103 results on '"A. S. W. Ho"'
Search Results
2. Fabrication and Assembly of Cu-RDL-Based 2.5-D Low-Cost Through Silicon Interposer (LC-TSI).
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Guruprasad Katti, S. W. Ho, Li Hong Yu, Songbai Zhang, Rahul Dutta, Roshan Weerasekera, Ka-Fai Chang, Jong-Kai Lin, Srinivasa Rao Vempati, and Surya Bhattacharya
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- 2015
- Full Text
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3. The wonders of BMP9: From mesenchymal stem cell differentiation, angiogenesis, neurogenesis, tumorigenesis, and metabolism to regenerative medicine
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Hue H. Luu, Guillermo A. Ameer, Aravind Athiviraham, Jennifer Moriatis Wolf, Hector Castillo, Russell R. Reid, Elam Coalson, Alex Alverdy, Sami Mostafa, Scott Du, Jason Strelzow, Elliott Bishop, Sherwin S. W. Ho, Alex Li, Yixiao Feng, Mingyang Li, Tong-Chuan He, Di Wu, Jiaming Fan, Winny Liu, Kelly Hynes, Alison Deng, Mikhail Pakvasa, Rex C. Haydon, Ofir Hagag, Michael J. Lee, Mia Spezia, Allen Zhu, and Alissa N. Li
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0301 basic medicine ,Bone morphogenetic proteins (BMPs) ,Angiogenesis ,Cellular differentiation ,Mesenchymal stem cells (MSCs) ,Biology ,Bone morphogenetic protein ,Biochemistry ,Regenerative medicine ,Article ,03 medical and health sciences ,0302 clinical medicine ,Osteogenesis ,BMP9/GDF2 ,Molecular Biology ,Genetics (clinical) ,Adipogenesis ,Neurogenesis ,Cell Biology ,3. Good health ,Cell biology ,030104 developmental biology ,Metabolism ,030220 oncology & carcinogenesis ,Tumorigenesis ,Mesenchymal stem cell differentiation ,Signal transduction - Abstract
Although bone morphogenetic proteins (BMPs) initially showed effective induction of ectopic bone growth in muscle, it has since been determined that these proteins, as members of the TGF-β superfamily, play a diverse and critical array of biological roles. These roles include regulating skeletal and bone formation, angiogenesis, and development and homeostasis of multiple organ systems. Disruptions of the members of the TGF-β/BMP superfamily result in severe skeletal and extra-skeletal irregularities, suggesting high therapeutic potential from understanding this family of BMP proteins. Although it was once one of the least characterized BMPs, BMP9 has revealed itself to have the highest osteogenic potential across numerous experiments both in vitro and in vivo, with recent studies suggesting that the exceptional potency of BMP9 may result from unique signaling pathways that differentiate it from other BMPs. The effectiveness of BMP9 in inducing bone formation was recently revealed in promising experiments that demonstrated efficacy in the repair of critical sized cranial defects as well as compatibility with bone-inducing bio-implants, revealing the great translational promise of BMP9. Furthermore, emerging evidence indicates that, besides its osteogenic activity, BMP9 exerts a broad range of biological functions, including stem cell differentiation, angiogenesis, neurogenesis, tumorigenesis, and metabolism. This review aims to summarize our current understanding of BMP9 across biology and the body.
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- 2019
4. The effect of surgical setting on anterior cruciate ligament reconstruction outcomes
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Aravind Athiviraham, Daniel M. Curtis, Mia M. Helfrich, Sherwin S. W. Ho, and Charles Qin
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Male ,Reoperation ,medicine.medical_specialty ,Outpatient Clinics, Hospital ,Databases, Factual ,Anterior cruciate ligament reconstruction ,medicine.medical_treatment ,Physical Therapy, Sports Therapy and Rehabilitation ,Comorbidity ,Health outcomes ,Ambulatory Care Facilities ,Cohort Studies ,03 medical and health sciences ,0302 clinical medicine ,Ambulatory Care ,medicine ,Humans ,Outpatient clinic ,Orthopedics and Sports Medicine ,030212 general & internal medicine ,Health policy ,Anterior Cruciate Ligament Reconstruction ,business.industry ,Anterior Cruciate Ligament Injuries ,Patient Selection ,030229 sport sciences ,humanities ,Logistic Models ,Ambulatory Surgical Procedures ,Ambulatory ,Physical therapy ,Female ,business - Abstract
Objective: Ambulatory surgical centers (ASC’s) have emerged as an alternative to the traditional hospital- based outpatient department (HOPD). We aim to determine the effect of surgical setting on ...
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- 2019
5. A Safe Interval between Preoperative Intra-articular Corticosteroid Injections and Subsequent Knee Arthroscopy
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Sarah Bhattacharjee, Wonyong Lee, Sherwin S. W. Ho, Michael J. Lee, Aravind Athiviraham, and Lewis L. Shi
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medicine.medical_specialty ,Time Factors ,Knee Joint ,medicine.drug_class ,Injections, Intra-Articular ,03 medical and health sciences ,Arthroscopy ,0302 clinical medicine ,Intra articular ,Adrenal Cortex Hormones ,medicine ,Postoperative infection ,Humans ,Surgical Wound Infection ,Orthopedics and Sports Medicine ,Surgical treatment ,Retrospective Studies ,030222 orthopedics ,Knee arthroscopy ,business.industry ,030229 sport sciences ,Surgery ,Cohort ,Corticosteroid ,business - Abstract
The purpose of this study is to evaluate the influence of intra-articular corticosteroid injections prior to knee arthroscopy on the rate of postoperative infection and define a safe timing interval between intra-articular corticosteroid injections and subsequent knee arthroscopy. The PearlDiver Database was used to identify patients who underwent a knee arthroscopy from 2007 to 2017. Patients were sorted into an injection cohort if they received any intra-articular corticosteroid injections within 6 months before surgery and a control cohort if they received no such injections. The injection cohort was then stratified into subgroups based on the timing of the most recent injection. We identified two types of postoperative infection in the 6 months following surgery: a broad definition of infection using knee infection diagnoses, and a narrow definition of infection requiring surgical treatment. The effects of the timing of preoperative corticosteroid injections on the rates of postoperative infection were investigated. The rate of broadly defined postoperative infection was significantly higher in the 0 to 2 weeks injection group (6.90%, 20/290) than the control group (2.01%, 1,449/72,089, p
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- 2020
6. Notch signaling: Its essential roles in bone and craniofacial development
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Changchun Niu, Jason Strelzow, Na Ni, Di Wu, Kevin H. Qin, Hao Hao Wang, Alonzo Jones, Tong-Chuan He, Mostafa H. El Dafrawy, Junyi Liao, Huaxiu Luo, Russell R. Reid, Kelly Hynes, Jing Zhang, Xiaoxing Wu, Michael J. Lee, Zongyue Zeng, Deyao Shi, Yukun Mao, Linjuan Huang, Mikhail Pakvasa, Pranav N. Haravu, Meng Meng Zhang, Meng. T. Wu, Qing Liu, Michael Boachie-Mensah, Elam Coalson, Kai Fu, Jennifer Moriatis Wolf, Aravind Athiviraham, Sherwin S. W. Ho, Fang He, Yongtao Zhang, and Xia Zhao
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0301 basic medicine ,Spondylocostal dysosotosis ,Notch ,lcsh:QH426-470 ,Notch signaling pathway ,Review Article ,Biology ,Biochemistry ,03 medical and health sciences ,0302 clinical medicine ,Osteogenesis ,Craniosynostosis ,medicine ,Craniofacial skeleton ,Craniofacial ,Bone ,Molecular Biology ,Genetics (clinical) ,Oncogenesis ,lcsh:R5-920 ,Cell Biology ,Alagille syndrome ,lcsh:Genetics ,Skull ,030104 developmental biology ,medicine.anatomical_structure ,030220 oncology & carcinogenesis ,Signal transduction ,lcsh:Medicine (General) ,Neuroscience ,Craniofacial development - Abstract
Notch is a cell–cell signaling pathway that is involved in a host of activities including development, oncogenesis, skeletal homeostasis, and much more. More specifically, recent research has demonstrated the importance of Notch signaling in osteogenic differentiation, bone healing, and in the development of the skeleton. The craniofacial skeleton is complex and understanding its development has remained an important focus in biology. In this review we briefly summarize what recent research has revealed about Notch signaling and the current understanding of how the skeleton, skull, and face develop. We then discuss the crucial role that Notch plays in both craniofacial development and the skeletal system, and what importance it may play in the future.
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- 2020
7. Sox9 augments BMP2-induced chondrogenic differentiation by downregulating Smad7 in mesenchymal stem cells (MSCs)
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Lewis L. Shi, Chen Zhao, Xi Liang, Junyi Liao, Wei Huang, Wei Jiang, Wei Xu, Mingming Yang, Wei Liu, Leonardo P. Oliveira, Hong Chen, H.M. Tsai, Jennifer Moriatis Wolf, Sherwin S. W. Ho, Aravind Athiviraham, Ning Hu, Nian Zhou, and Tong-Chuan He
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0301 basic medicine ,animal structures ,lcsh:QH426-470 ,Mesenchymal stem cells (MSCs) ,Biology ,Biochemistry ,Bone morphogenetic protein 2 ,Article ,Chondrocyte ,Cartilage tissue engineering ,03 medical and health sciences ,medicine ,Molecular Biology ,Endochondral ossification ,Bone morphogenetic protein 2 (BMP2) ,Genetics (clinical) ,Stem cell transplantation for articular cartilage repair ,lcsh:R5-920 ,Smad7 ,Chondrogenic differentiation ,Cartilage ,Mesenchymal stem cell ,fungi ,Cell Biology ,Anatomy ,Chondrogenesis ,biological factors ,Cell biology ,lcsh:Genetics ,030104 developmental biology ,medicine.anatomical_structure ,embryonic structures ,Stem cell ,lcsh:Medicine (General) ,Sox9 - Abstract
Cartilage injuries caused by arthritis or trauma pose formidable challenges for effective clinical management due to the limited intrinsic proliferative capability of chondrocytes. Autologous stem cell-based therapies and transgene-enhanced cartilage tissue engineering may open new avenues for the treatment of cartilage injuries. Bone morphogenetic protein 2 (BMP2) induces effective chondrogenesis of mesenchymal stem cells (MSCs) and can thus be explored as a potential therapeutic agent for cartilage defect repair. However, BMP2 also induces robust endochondral ossification. Although the precise mechanisms through which BMP2 governs the divergence of chondrogenesis and osteogenesis remain to be fully understood, blocking endochondral ossification during BMP2-induced cartilage formation may have practical significance for cartilage tissue engineering. Here, we investigate the role of Sox9-donwregulated Smad7 in BMP2-induced chondrogenic differentiation of MSCs. We find that overexpression of Sox9 leads to a decrease in BMP2-induced Smad7 expression in MSCs. Sox9 inhibits BMP2-induced expression of osteopontin while enhancing the expression of chondrogenic marker Col2a1 in MSCs. Forced expression of Sox9 in MSCs promotes BMP2-induced chondrogenesis and suppresses BMP2-induced endochondral ossification. Constitutive Smad7 expression inhibits BMP2-induced chondrogenesis in stem cell implantation assay. Mouse limb explant assay reveals that Sox9 expands BMP2-stimulated chondrocyte proliferating zone while Smad7 promotes BMP2-intitated hypertrophic zone of the growth plate. Cell cycle analysis indicates that Smad7 induces significant early apoptosis in BMP2-stimulated MSCs. Taken together, our results strongly suggest that Sox9 may facilitate BMP2-induced chondrogenesis by downregulating Smad7, which can be exploited for effective cartilage tissue engineering.
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- 2017
8. Design and Optimization of Wafer-Level Compression Molding Process for One Chip Plus Multiple Decaps
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Xiaowu Zhang, S. W. Ho, T. C. Chai, Booyang Jung, Sorono Dexter Velez, Lau Boon Long, and Lin Bu
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Engineering ,business.industry ,Design flow ,Semiconductor device modeling ,Process (computing) ,Mechanical engineering ,Compression molding ,Hardware_PERFORMANCEANDRELIABILITY ,Chip ,Industrial and Manufacturing Engineering ,Die (integrated circuit) ,Electronic, Optical and Magnetic Materials ,Printed circuit board ,Hardware_INTEGRATEDCIRCUITS ,Electronic engineering ,Wafer ,Electrical and Electronic Engineering ,business - Abstract
Decaps are the panacea for the noise-related issues. Due to the short distance advantage, decaps are embedded in the fan-out wafer-level package instead of the printed circuit board. These decaps, generally thicker than chips, will have a crucial influence on the molding process as well. A lot of issues are encountered in the molding process, especially with lots of decaps, i.e., voids issues, incomplete filling issues, and die shift issues. In an optimized design, all these issues should be prevented or reduced as much as possible. In this paper, design flow for the wafer-level molding process is demonstrated and design guidelines are provided. Three important evaluation standards are used to evaluate the design, i.e., incomplete filling, drag force, and voids. Two kinds of design parameters, structure parameters (i.e., die placement, die size and thickness, and so on) and process parameters (i.e., vacuum pressure, filling speed, and so on), are optimized in the whole study. Optimization of these parameters helps the real wafer-level molding process to be conducted smoothly.
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- 2015
9. Adenovirus-Mediated Gene Delivery: Potential Applications for Gene and Cell-Based Therapies in the New Era of Personalized Medicine
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Russell R. Reid, Shujuan Yan, Jiayan Lei, Ruyi Zhang, Evan M. Farina, Wenwen Zhang, Ke Wu, Aravind Athiviraham, Xingye Wu, Yasha Li, Michael J. Lee, Zongyue Zeng, Chao Yang, Chen Zhao, Jennifer Moriatis Wolf, Yi Shu, Xinyi Yu, Ying Wu, Elliot S. Bishop, Cody S. Lee, Tong-Chuan He, and Sherwin S. W. Ho
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0301 basic medicine ,Oncolytic virus ,lcsh:QH426-470 ,Genetic enhancement ,Systems biology ,Computational biology ,Gene delivery ,Biology ,Biochemistry ,Regenerative medicine ,Cell therapy ,Article ,Vaccine development ,Viral vector ,03 medical and health sciences ,Gene therapy ,Adenovirus ,Adenoviral vector ,Gene transfer ,Molecular Biology ,Genetics (clinical) ,lcsh:R5-920 ,business.industry ,Cell Biology ,Virology ,3. Good health ,lcsh:Genetics ,030104 developmental biology ,Personalized medicine ,lcsh:Medicine (General) ,business - Abstract
With rapid advances in understanding molecular pathogenesis of human diseases in the era of genome sciences and systems biology, it is anticipated that increasing numbers of therapeutic genes or targets will become available for targeted therapies. Despite numerous setbacks, efficacious gene and/or cell-based therapies still hold the great promise to revolutionize the clinical management of human diseases. It is wildly recognized that poor gene delivery is the limiting factor for most in vivo gene therapies. There has been a long-lasting interest in using viral vectors, especially adenoviral vectors, to deliver therapeutic genes for the past two decades. Among all currently available viral vectors, adenovirus is the most efficient gene delivery system in a broad range of cell and tissue types. The applications of adenoviral vectors in gene delivery have greatly increased in number and efficiency since their initial development. In fact, among over 2,000 gene therapy clinical trials approved worldwide since 1989, a significant portion of the trials have utilized adenoviral vectors. This review aims to provide a comprehensive overview on the characteristics of adenoviral vectors, including adenoviral biology, approaches to engineering adenoviral vectors, and their applications in clinical and pre-clinical studies with an emphasis in the areas of cancer treatment, vaccination and regenerative medicine. Current challenges and future directions regarding the use of adenoviral vectors are also discussed. It is expected that the continued improvements in adenoviral vectors should provide great opportunities for cell and gene therapies to live up to its enormous potential in personalized medicine.
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- 2017
10. Error-Free Perfect Secrecy Systems
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S.-W. Ho, T. Chan, A. Grant, C. Uduwerelle, Ho, Siu Wai, Chan, Terence, Grant, A, and Uduwerelle, C
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ciphertext ,cipher systems ,Data_CODINGANDINFORMATIONTHEORY ,encryption ,Computer Science::Information Theory ,Computer Science::Cryptography and Security - Abstract
Shannon's fundamental bound for perfect secrecy says that the source entropy cannot be larger than the entropy of the secret key initially shared by the sender and the legitimate receiver. Massey gave an information theoretic proof of this result, and his proof does not require independence of the key and the source message. By further assuming independence, some stronger results, which govern the probability distributions of the key and the ciphertext, can be shown. These results illustrate that the key entropy is not less than the logarithm of the message sample size in any cipher achieving perfect secrecy, even if the source distribution is fixed. The same bound also applies to the entropy of the ciphertext. These results still hold if the source message has been compressed before encryption.
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- 2017
11. OMICS AND PROGNSTIC MARKERS
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K. Adachi, H. Sasaki, S. Nagahisa, K. Yoshida, N. Hattori, Y. Nishiyama, T. Kawase, M. Hasegawa, M. Abe, Y. Hirose, A. Alentorn, Y. Marie, S. Poggioli, H. Alshehhi, B. Boisselier, C. Carpentier, K. Mokhtari, L. Capelle, D. Figarella-Branger, K. Hoang-Xuan, M. Sanson, J.-Y. Delattre, A. Idbaih, S. Yust-Katz, M. Anderson, A. Olar, A. Eterovic, N. Ezzeddine, K. Chen, H. Zhao, G. Fuller, K. Aldape, J. de Groot, N. Andor, J. Harness, S. G. Lopez, T. L. Fung, H. W. Mewes, C. Petritsch, A. Arivazhagan, K. Somasundaram, K. Thennarasu, P. Pandey, B. Anandh, V. Santosh, B. Chandramouli, A. Hegde, P. Kondaiah, M. Rao, R. Bell, R. Kang, C. Hong, J. Song, J. Costello, R. Nagarajan, B. Zhang, A. Diaz, T. Wang, L. Bie, Y. Li, H. Liu, W. F. C. Luyo, M. H. Carnero, M. E. P. Iruegas, A. R. Morell, M. C. Figueiras, R. L. Lopez, C. F. Valverde, A. K.-Y. Chan, J. C.-S. Pang, N. Y.-F. Chung, K. K.-W. Li, W. S. Poon, D. T.-M. Chan, Y. Wang, H.-a. K. Ng, M. Chaumeil, P. Larson, H. Yoshihara, D. Vigneron, S. Nelson, R. Pieper, J. Phillips, S. Ronen, V. Clark, Z. E. Omay, A. Serin, J. Gunel, B. Omay, C. Grady, M. Youngblood, K. Bilguvar, J. Baehring, J. Piepmeier, P. Gutin, A. Vortmeyer, C. Brennan, M. N. Pamir, T. Kilic, B. Krischek, M. Simon, K. Yasuno, M. Gunel, A. L. Cohen, M. Sato, K. D. Aldape, C. Mason, K. Diefes, L. Heathcock, L. Abegglen, D. Shrieve, W. Couldwell, J. D. Schiffman, H. Colman, Q. G. D'Alessandris, T. Cenci, M. Martini, L. Ricci-Vitiani, R. De Maria, L. M. Larocca, R. Pallini, B. Theeler, F. Lang, G. Rao, M. Gilbert, E. Sulman, R. Luthra, K. Eterovic, M. Routbort, R. Verhaak, G. Mills, J. Mendelsohn, F. Meric-Bernstam, A. Yung, K. MacArthur, S. Hahn, G. Kao, R. Lustig, M. Alonso-Basanta, S. Chandrasekaran, E. P. Wileyto, E. Reyes, J. Dorsey, K. Fujii, K. Kurozumi, T. Ichikawa, M. Onishi, J. Ishida, Y. Shimazu, B. Kaur, E. A. Chiocca, I. Date, C. Geisenberger, A. Mock, R. Warta, C. Schwager, C. Hartmann, A. von Deimling, A. Abdollahi, C. Herold-Mende, O. Gevaert, A. Achrol, S. Gholamin, S. Mitra, E. Westbroek, J. Loya, L. Mitchell, S. Chang, G. Steinberg, S. Plevritis, S. Cheshier, J. Xu, S. Napel, G. Zaharchuk, G. Harsh, D. Gutman, C. Holder, R. Colen, W. Dunn, R. Jain, L. Cooper, S. Hwang, A. Flanders, D. Brat, J. Hayes, A. Droop, H. Thygesen, M. Boissinot, D. Westhead, S. Short, S. Lawler, P. Bady, S. Kurscheid, M. Delorenzi, M. E. Hegi, C. Crosby, C. Faulkner, T. Smye-Rumsby, K. Kurian, M. Williams, K. Hopkins, A. Palmer, H. Williams, C. Wragg, H. R. Haynes, K. M. Kurian, P. White, T. Oka, L. Jalbert, A. Elkhaled, R. Jensen, K. Salzman, M. Schabel, D. Gillespie, M. Mumert, B. Johnson, T. Mazor, M. Barnes, S. Yamamoto, H. Ueda, K. Tatsuno, K. Aihara, A. Bollen, M. Hirst, M. Marra, A. Mukasa, N. Saito, H. Aburatani, M. Berger, B. Taylor, S. Popov, A. Mackay, W. Ingram, A. Burford, A. Jury, M. Vinci, C. Jones, D. T. W. Jones, V. Hovestadt, S. Picelli, W. Wang, P. A. Northcott, M. Kool, G. Reifenberger, T. Pietsch, M. Sultan, H. Lehrach, M.-L. Yaspo, A. Borkhardt, P. Landgraf, R. Eils, A. Korshunov, M. Zapatka, B. Radlwimmer, S. M. Pfister, P. Lichter, A. Joy, I. Smirnov, M. Reiser, W. Shapiro, S. Kim, B. Feuerstein, C. Jungk, S. Friauf, A. Unterberg, T. A. Juratli, J. McElroy, W. Meng, A. Huebner, K. D. Geiger, D. Krex, G. Schackert, A. Chakravarti, T. Lautenschlaeger, B. Y. Kim, W. Jiang, J. Beiko, S. Prabhu, F. DeMonte, R. Sawaya, D. Cahill, I. McCutcheon, C. Lau, L. Wang, K. Terashima, S. Yamaguchi, M. Burstein, J. Sun, T. Suzuki, R. Nishikawa, H. Nakamura, A. Natsume, S. Terasaka, H.-K. Ng, D. Muzny, R. Gibbs, D. Wheeler, X.-q. Zhang, S. Sun, K.-f. Lam, K. M. Y. Kiang, J. K. S. Pu, A. S. W. Ho, G. K. K. Leung, F. Loebel, W. T. Curry, F. G. Barker, N. Lelic, A. S. Chi, D. P. Cahill, D. Lu, J. Yin, C. Teo, K. McDonald, A. Madhankumar, C. Weston, B. Slagle-Webb, J. Sheehan, A. Patel, M. Glantz, J. Connor, C. Maire, J. Francis, C.-Z. Zhang, J. Jung, V. Manzo, V. Adalsteinsson, H. Homer, B. Blumenstiel, C. S. Pedamallu, E. Nickerson, A. Ligon, C. Love, M. Meyerson, K. Ligon, L. E. Jalbert, S. J. Nelson, A. W. Bollen, I. V. Smirnov, J. S. Song, A. B. Olshen, M. S. Berger, S. M. Chang, B. S. Taylor, J. F. Costello, S. Mehta, B. Armstrong, S. Peng, A. Bapat, M. Berens, B. Melendez, M. Mollejo, P. Mur, T. Hernandez-Iglesias, C. Fiano, J. Ruiz, J. A. Rey, V. Stadler, A. Schulte, K. Lamszus, C. Schichor, M. Westphal, J.-C. Tonn, O. Morozova, S. Katzman, M. Grifford, S. Salama, D. Haussler, A. Olshen, S. Fouse, S. Nakamizo, T. Sasayama, H. Tanaka, K. Tanaka, K. Mizukawa, M. Yoshida, E. Kohmura, P. Northcott, D. Jones, S. Pfister, R. Otani, S. Takayanagi, K. Saito, S. Tanaka, M. Shin, T. Ozawa, M. Riester, Y.-K. Cheng, J. Huse, K. Helmy, N. Charles, M. Squatrito, F. Michor, E. Holland, M. Perrech, L. Dreher, G. Rohn, R. Goldbrunner, M. Timmer, B. Pollo, V. Palumbo, C. Calatozzolo, M. Patane, R. Nunziata, M. Farinotti, A. Silvani, S. Lodrini, G. Finocchiaro, E. Lopez, A. Rioscovian, R. Ruiz, G. Siordia, A. P. de Leon, C. Rostomily, R. Rostomily, D. Silbergeld, D. Kolstoe, M. Chamberlain, J. Silber, P. Roth, A. Keller, J. Hoheisel, P. Codo, A. Bauer, C. Backes, P. Leidinger, E. Meese, E. Thiel, A. Korfel, M. Weller, G. Nagae, M. Nagane, J. Z. Sanborn, T. Mikkelsen, S. Jhanwar, L. Chin, M. Nishihara, M. Schliesser, C. Grimm, E. Weiss, R. Claus, D. Weichenhan, M. Weiler, T. Hielscher, F. Sahm, B. Wiestler, A.-C. Klein, J. Blaes, C. Plass, W. Wick, G. Stragliotto, A. Rahbar, C. Soderberg-Naucler, M. Won, R. Ezhilarasan, P. Sun, D. Blumenthal, M. Vogelbaum, R. Jenkins, R. Jeraj, P. Brown, K. Jaeckle, D. Schiff, J. Dignam, J. Atkins, D. Brachman, M. Werner-Wasik, M. Mehta, J. Shen, J. Luan, A. Yu, M. Matsutani, Y. Liang, T.-K. Man, A. Trister, M. Tokita, S. Mikheeva, A. Mikheev, S. Friend, M. van den Bent, L. Erdem, T. Gorlia, M. Taphoorn, J. Kros, P. Wesseling, H. Dubbink, A. Ibdaih, P. French, H. van Thuijl, J. Heimans, B. Ylstra, J. Reijneveld, A. Prabowo, I. Scheinin, H. van Essen, W. Spliet, C. Ferrier, P. van Rijen, T. Veersema, M. Thom, A. S.-v. Meeteren, E. Aronica, H. Kim, S. Zheng, D. J. Brat, S. Virk, S. Amini, C. Sougnez, J. Barnholtz-Sloan, R. G. W. Verhaak, C. Watts, A. Sottoriva, I. Spiteri, S. Piccirillo, A. Touloumis, P. Collins, J. Marioni, C. Curtis, S. Tavare, B. Tews, T. P. C. Yeung, B. Al-Khazraji, L. Morrison, L. Hoffman, D. Jackson, T.-Y. Lee, S. Yartsev, G. Bauman, J. Fu, R. Vegesna, Y. Mao, L. E. Heathcock, W. Torres-Garcia, S. Wang, A. McKenna, C. W. Brennan, W. K. A. Yung, J. N. Weinstein, E. P. Sulman, and D. Koul
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Abstracts ,Cancer Research ,Text mining ,Oncology ,business.industry ,Neurology (clinical) ,Computational biology ,Biology ,Omics ,business - Published
- 2013
12. Investigation on Die Shift Issues in the 12-in Wafer-Level Compression Molding Process
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Lin Bu, Sorono Dexter Velez, Xiaowu Zhang, T. C. Chai, and S. W. Ho
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Engineering drawing ,Materials science ,Flow (psychology) ,Mechanical engineering ,Compression molding ,Molding (process) ,medicine.disease_cause ,Industrial and Manufacturing Engineering ,Die (integrated circuit) ,Quantitative Biology::Cell Behavior ,Computer Science::Other ,Electronic, Optical and Magnetic Materials ,Drag ,Mold ,medicine ,Wafer ,Electrical and Electronic Engineering ,Wafer-level packaging - Abstract
Die shift issues that arise in embedded wafer-level packaging because of the mold flow process is investigated in this paper, along with solution strategies to address them. The nonlinearity trend of the die shift in the experimental inspection is explained and captured by the numerical simulation with a consideration of the coefficient of thermal expansion effect coupled with the mold flow effect. Optimizing the initial diameter of molding compounds, increasing the thickness of molding compounds, and reducing the filling speed are the three solutions we demonstrate for reducing the drag force. Die shift generated by the mold flow could be reduced by optimizing these controllable parameters.
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- 2013
13. Finding an Optimal Search Sequence of Files.
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S. W. Ho
- Published
- 1981
14. Optimising Conjunctive Queries on a Relational Interface to CODASYL DBMS.
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S. W. Ho
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- 1982
15. Genomic collinearity and the genetic architecture of floral differences between the homoploid hybrid species Iris nelsonii and one of its progenitors, Iris hexagona
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L D Rojas, S W Ho, Sunni J. Taylor, and Noland H. Martin
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Genetics ,Reproductive Isolation ,Genetic Linkage ,Iris Plant ,Quantitative Trait Loci ,food and beverages ,Flowers ,Reproductive isolation ,Quantitative trait locus ,Biology ,Genetic architecture ,Pollinator ,Genetic linkage ,Trait ,Original Article ,Hybrid speciation ,Iris hexagona ,Ecosystem ,Genome, Plant ,Genetics (clinical) - Abstract
Hybrid speciation represents a relatively rapid form of diversification. Early models of homoploid hybrid speciation suggested that reproductive isolation between the hybrid species and progenitors primarily resulted from karyotypic differences between the species. However, genic incompatibilities and ecological divergence may also be responsible for isolation. Iris nelsonii is an example of a homoploid hybrid species that is likely isolated from its progenitors primarily by strong prezygotic isolation, including habitat divergence, floral isolation and post-pollination prezygotic barriers. Here, we used linkage mapping and quantitative trait locus (QTL) mapping approaches to investigate genomic collinearity and the genetic architecture of floral differences between I. nelsonii and one of its progenitor species I. hexagona. The linkage map produced from this cross is highly collinear with another linkage map produced between I. fulva and I. brevicaulis (the two other species shown to have contributed to the genomic makeup of I. nelsonii), suggesting that karyotypic differences do not contribute substantially to isolation in this homoploid hybrid species. Similar to other studies of the genetic architecture of floral characteristics, at least one QTL was found that explained >20% variance in each color trait, while minor QTLs were detected for each morphological trait. These QTLs will serve as hypotheses for regions under selection by pollinators.
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- 2012
16. Tendinopathy Treatment: Where is the Evidence?
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Alexander K. Meininger, Christian C. Skjong, and Sherwin S. W. Ho
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medicine.medical_specialty ,Cumulative Trauma Disorders ,MEDLINE ,Pain relief ,Physical Therapy, Sports Therapy and Rehabilitation ,Running ,Tendinitis ,Prevalence ,medicine ,Humans ,Pain Management ,Orthopedics and Sports Medicine ,Intensive care medicine ,SCLEROSING AGENTS ,Evidence-Based Medicine ,business.industry ,Incidence ,Evidence-based medicine ,medicine.disease ,Symptomatic relief ,United States ,Exercise Therapy ,Eccentric exercise ,Athletic Injuries ,Tendinopathy ,business - Abstract
Tendinopathy is a common and debilitating condition that results in significant deficits in performance and prolonged time away from activity. For this reason, much effort has been placed in defining beneficial and cost-effective treatments. This review has outlined the current literature on some of the most widely used therapies for cases of tendinopathy. As such, recommendations remain limited by the evidence available. The variability in both quantity and quality of research into tendinopathy treatments makes it difficult to make definitive treatment recommendations. In general, however, a reasonable first line of treatment for tendinopathy should include a course of NSAIDs and eccentric exercise-based physical therapy. Corticosteroid injections seem to offer excellent short-term pain relief but lack long term efficacy. Alternative injections, such as PRP, have shown short-term efficacy for tendinopathy sufferers; data are lacking to support sclerosing agents and proteinase inhibitors. Operative management seems to offer some benefit in symptomatic relief but carries a higher complication rate than other treatment options and should be reserved only for patients recalcitrant to other more conservative options. Although the inability to make definitive therapeutic recommendations in some instances is discouraging, it is important to note that a lack of high-quality evidence supporting specific treatments does not necessarily imply that they are inherently ineffective. Given the growing prevalence of tendinopathy and the impact it has on the general public, it is more important now than ever to continue the search for the most effective and accessible treatment modalities.
- Published
- 2012
17. Clinical and radiographic evaluation of NobelActiveTMdental implants
- Author
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Bradley Curtis, Kwan Yat Zee, Peter Hell, Vijay Tumuluri, Danny S. W. Ho, and Stephen Yeung
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Male ,Insertion torque ,Immediate Dental Implant Loading ,Cone beam computed tomography ,Radiography ,Dentistry ,Mandible ,law.invention ,Postoperative Complications ,Randomized controlled trial ,Bone Density ,law ,Humans ,Medicine ,Prospective Studies ,Dental Implants ,Crowns ,business.industry ,Jaw, Edentulous, Partially ,Radiography, Dental, Digital ,Cone-Beam Computed Tomography ,Middle Aged ,Resonance frequency analysis ,Treatment Outcome ,Dental Prosthesis Design ,Torque ,Female ,Implant ,Oral Surgery ,business - Abstract
OBJECTIVES To conduct a randomised controlled trial to evaluate the short-term clinical and radiographic efficacy of the NobelActive™ system and to evaluate the relative importance of achieving primary stability at placement. MATERIALS AND METHODS A total of 32 subjects were recruited and, using a split-mouth design, the NobelActive(TM) implant was compared with a contralaterally matched Branemark implant. Both implants were placed in a single surgical procedure into healed sites using a one-stage protocol and reviewed at monthly intervals. NobelActive(TM) implants were functionally loaded with provisional restorations at 1 month and all implants were restored with final crowns 3 months post-implant placement. The implant was assessed using peak insertion torque values, resonance frequency analysis (RFA), clinical parameters, digital subtraction radiography, and cone beam computed tomography. RESULTS The insertion torque was significantly greater for the NobelActive(TM) implant group (P = 0.02), although no observable difference in RFA values were found. Preliminary results of 6 months follow-up suggest comparable clinical and radiographic healing responses between the test and control implants. Within the limits of the sample population, the survival rates were lower with the test implants, although this difference was not statistically significant. CONCLUSIONS The NobelActive(TM) implant system requires higher insertion torques and can also achieve greater primary stability compared with a control implant system. Short-term survival and marginal bone levels of NobelActive(TM) and control implants are comparable, although the NobelActive(TM) implant system appeared to be more technique-sensitive.
- Published
- 2011
18. Cell Biology and Signaling
- Author
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M. Agarwal, R. Nitta, S. Dovat, G. Li, H. Arita, Y. Narita, S. Fukushima, K. Tateishi, Y. Matsushita, A. Yoshida, Y. Miyakita, M. Ohno, V. P. Collins, N. Kawahara, S. Shibui, K. Ichimura, S. A. Kahn, S. Gholamin, M.-P. Junier, H. Chneiweiss, I. Weissman, S. Mitra, S. Cheshier, T. Avril, A. Hamlat, P.-J. Le Reste, J. Mosser, V. Quillien, C. Carrato, A. Munoz-Marmol, L. Serrano, L. Pijuan, C. Hostalot, S. l. Villa, A. Ariza, O. Etxaniz, C. Balana, E. T. Benveniste, Y. Zheng, B. McFarland, D. Drygin, S. Bellis, M. Bredel, D. Lotsch, C. Engelmaier, S. Allerstorfer, M. Grusch, J. Pichler, S. Weis, J. Hainfellner, C. Marosi, S. Spiegl-Kreinecker, W. Berger, A. Bronisz, M. O. Nowicki, Y. Wang, K. Ansari, E. A. Chiocca, J. Godlewski, K. Brown, M. Kwatra, T. Bui, S. Zhu, D. Kozono, J. Li, D. Kushwaha, B. Carter, C. Chen, J. Schulte, M. Srikanth, S. Das, J. Zhang, J. Lathia, L. Yin, J. Rich, E. Olson, J. Kessler, A. Chenn, A. Cherry, B. Haas, Y. H. Lin, S.-E. Ong, N. Stella, C. P. Cifarelli, R. J. Griffin, D. Cong, W. Zhu, Y. Shi, P. Clark, J. Kuo, S. Hu, D. Sun, M. Bookland, N. Darbinian, A. Dey, M. Robitaille, M. Remke, D. Faury, C. Maier, A. Malhotra, N. Jabado, M. Taylor, S. Angers, A. Kenney, X. Ren, H. Zhou, M. Schur, A. Baweja, M. Singh, A. Erdreich-Epstein, J. Fu, D. Koul, J. Yao, N. Saito, S. Zheng, R. Verhaak, Z. Lu, W. K. A. Yung, G. Gomez, S. Volinia, C. Croce, C. Brennan, W. Cavenee, F. Furnari, S. G. Lopez, D. Qu, C. Petritsch, M. Gonzalez-Huarriz, G. Aldave, D. Ravi, A. Rubio, R. Diez-Valle, M. Marigil, P. Jauregi, B. Vera, A. A. d. l. Rocha, S. Tejada-Solis, M. M. Alonso, U. Gopal, J. Isaacs, M. Gruber-Olipitz, S. Dabral, S. Ramkissoon, A. Kung, E. Pak, J. Chung, M. Theisen, Y. Sun, V. Monrose, Y. Franchetti, D. Shulman, N. Redjal, B. Tabak, R. Beroukhim, J. Zhao, S. Buonamici, K. Ligon, J. Kelleher, R. Segal, D. Canton, P. Diaz, J. Scott, K. Hara, T. Kageji, Y. Mizobuchi, K. Kitazato, T. Okazaki, T. Fujihara, K. Nakajima, H. Mure, K. Kuwayama, T. Hara, S. Nagahiro, L. Hill, H. Botfield, K. Hossain-Ibrahim, A. Logan, G. Cruickshank, Y. Liu, M. Gilbert, N. Kyprianou, V. Rangnekar, C. Horbinski, Y. Hu, C. Vo, Z. Li, C. Ke, N. Ru, K. R. Hess, M. E. Linskey, Y.-a. H. Zhou, F. Hu, K. Vinnakota, S. Wolf, H. Kettenmann, P. J. Jackson, J. D. Larson, D. A. Beckmann, B. S. Moriarity, D. A. Largaespada, S. Jalali, S. Agnihotri, S. Singh, K. Burrell, S. Croul, G. Zadeh, S.-H. Kang, M. O. Yu, N.-H. Song, K.-J. Park, S.-G. Chi, Y.-G. Chung, S. K. Kim, J. W. Kim, J. Y. Kim, J. E. Kim, S. H. Choi, T. M. Kim, S.-H. Lee, S.-K. Kim, S.-H. Park, I. H. Kim, C.-K. Park, H.-W. Jung, M. Koldobskiy, I. Ahmed, G. Ho, A. Snowman, E. Raabe, C. Eberhart, S. Snyder, I. Gugel, A. Bornemann, G. Pantazis, S. Mack, D. Shih, N. Sabha, M. Tatagiba, B. Krischek, A. Schulte, K. Liffers, A. Kathagen, S. Riethdorf, M. Westphal, K. Lamszus, J. S. Lee, J. Xiao, P. Patel, J. Schade, J. Wang, B. Deneen, H.-R. Song, L. Leiss, C. Gjerde, H. Saed, A. Rahman, M. Lellahi, P. O. Enger, R. Leung, O. Gil, L. Lei, P. Canoll, S. Sun, D. Lee, A. S. W. Ho, J. K. S. Pu, X.-q. Zhang, N. P. Lee, P. J. R. Dat, G. K. K. Leung, D. Loetsch, E. Steiner, K. Holzmann, C. Pirker, J. Hlavaty, H. Petznek, B. Hegedus, T. Garay, T. Mohr, W. Sommergruber, W. J. Lukiw, B. M. Jones, Y. Zhao, S. Bhattacharjee, F. Culicchia, N. Magnus, D. Garnier, B. Meehan, S. McGraw, M. Hashemi, T. H. Lee, C. Milsom, N. Gerges, J. Trasler, R. Pawlinski, N. Mackman, J. Rak, Z. Maherally, A. Thorne, Q. An, E. Barbu, H. Fillmore, G. Pilkington, S. L. Tan, S. Tan, S. Choi, C. Potts, D. A. Ford, Z. Nahle, A. M. Kenney, L. Matlaf, S. Khan, A. Zider, E. Singer, C. Cobbs, L. Soroceanu, B. C. McFarland, S. W. Hong, R. Rajbhandari, G. B. Twitty, G. K. Gray, H. Yu, E. N. Benveniste, S. E. Nozell, M. Minata, S. Kim, P. Mao, J. Kaushal, I. Nakano, T. Mizowaki, T. Sasayama, K. Tanaka, K. Mizukawa, M. Nishihara, S. Nakamizo, H. Tanaka, M. Kohta, K. Hosoda, E. Kohmura, S. Moeckel, K. Meyer, P. Leukel, U. Bogdahn, M. J. Riehmenschneider, A. K. Bosserhoff, R. Spang, P. Hau, A. Mukasa, A. Watanabe, H. Ogiwara, H. Aburatani, J. Mukherjee, S. Obha, W. See, R. Pieper, R. Otsuka, D. Kung, T. Sinha, G. Meares, S. Nozell, M. Ott, U. Litzenburger, K. Rauschenbach, L. Bunse, S. Pusch, K. Ochs, F. Sahm, C. Opitz, A. von Deimling, W. Wick, M. Platten, P. Peruzzi, R. Read, T. Fenton, J. Wykosky, S. Vandenberg, I. Babic, A. Iwanami, H. Yang, P. Mischel, J. Thomas, M. W. Ronellenfitsch, A. L. Thiepold, P. N. Harter, M. Mittelbronn, J. P. Steinbach, Y. Rybakova, A. Kalen, E. Sarsour, P. Goswami, J. Silber, G. Harinath, B. Aldaz, A. W. M. Fabius, S. Turcan, T. A. Chan, J. T. Huse, A. M. Sonabend, M. Bansal, P. Guarnieri, C. Soderquist, J. Yun, B. Kennedy, J. Sisti, S. Bruce, R. Bruce, R. Shakya, T. Ludwig, S. Rosenfeld, P. A. Sims, J. N. Bruce, A. Califano, M.-T. Stockhausen, K. Kristoffersen, L. S. Olsen, H. S. Poulsen, B. Stringer, B. Day, G. Barry, M. Piper, P. Jamieson, K. Ensbey, Z. Bruce, L. Richards, A. Boyd, A. Sufit, T. Burleson, J. P. Le, A. K. Keating, T. Sundstrom, J. K. Varughese, P. Harter, L. Prestegarden, K. Petersen, F. Azuaje, C. Tepper, E. Ingham, L. Even, S. Johnson, K. O. Skaftnesmo, M. Lund-Johansen, R. Bjerkvig, K. Ferrara, F. Thorsen, H. Takeshima, S. Yamashita, K. Yokogami, S. Mizuguchi, H. Nakamura, J. Kuratsu, T. Fukushima, K. Morishita, Y. Tang, D. Vaka, S. Chen, A. Ponnuswami, Y.-J. Cho, M. Monje, T. Nakamura, D. Cahill, K. Tiemann, H. Hedman, S. P. Niclou, M. Timmer, R. Tjiong, G. Rohn, R. Goldbrunner, P. Stavrinou, M. Perrech, M. Tokita, S. Mikheev, D. Sellers, A. Mikheev, Y. Kosai, R. Rostomily, I. Tritschler, K. Seystahl, J. J. Schroeder, M. Weller, A. Wade, A. E. Robinson, J. J. Phillips, Y. Gong, Y. Ma, Z. Cheng, R. Thompson, Q.-W. Fan, C. Cheng, W. Gustafson, E. Charron, P. Zipper, R. Wong, J. Chen, J. Lau, C. Knobbe-Thosen, N. Jura, G. Reifenberger, K. Shokat, W. Weiss, S. Wu, J. Hu, T. Taylor, G. R. Villa, P. S. Mischel, S. L. Gonias, D. Yamashita, T. Kondo, H. Takahashi, A. Inoue, S. Kohno, H. Harada, S. Ohue, T. Ohnishi, P. Li, J. Ng, L. Yuelling, F. Du, T. Curran, Z.-j. Yang, D. Zhu, R. C. Castellino, E. G. Van Meir, G. Begum, Q. Wang, S.-S. Yang, S.-H. Lin, and K. Kahle
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Cancer Research ,Tumor suppressor gene ,Central nervous system ,030204 cardiovascular system & hematology ,Biology ,urologic and male genital diseases ,Abstracts ,03 medical and health sciences ,0302 clinical medicine ,medicine ,Progenitor cell ,Transcription factor ,030304 developmental biology ,0303 health sciences ,urogenital system ,Cell growth ,medicine.disease ,nervous system diseases ,3. Good health ,Cell biology ,medicine.anatomical_structure ,NFIB ,Oncology ,Cell culture ,Neurology (clinical) ,Glioblastoma - Abstract
The phylogenetically-conserved vertebrate transcription factor, NFIB, is an orchestrator of glial differentiation in the developing mammalian central nervous system. We found NFIB expression to be reduced in glioblastoma (GBM), the commonest and most lethal primary adult brain cancer, so investigated what effect increased expression of NFIB had on GBM. Increased expression of NFIB in primary GBM cell lines induced expression of markers of glial differentiation, inhibited cell proliferation, reduced stem/progenitor cell growth, altered cell cycle progression and inhibited tumor growth in murine models of GBM. We thus identified NFIB to be a novel tumor suppressor gene in GBM.
- Published
- 2010
19. Comparison between self-assembling peptide nanofiber scaffold (SAPNS) and fibrin sealant in neurosurgical hemostasis
- Author
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Fei-Fan, Xu, Yue-Chun, Wang, Stella, Sun, Amy S W, Ho, Derek, Lee, Karrie M Y, Kiang, Xiao-Qin, Zhang, Wai-Man, Lui, Bai-Yun, Liu, Wu-Tian, Wu, and Gilberto K K, Leung
- Subjects
Wound Healing ,Time Factors ,Administration, Topical ,Nanofibers ,Fibrin Tissue Adhesive ,Hemostasis, Surgical ,Hemostatics ,Neurosurgical Procedures ,Rats, Sprague-Dawley ,Disease Models, Animal ,Brain Injuries ,Original Research Articles ,Animals ,Peptides - Abstract
RADA16‐I is a synthetic type I self‐assembling peptide nanofiber scaffold (SAPNS) which may serve as a novel biocompatible hemostatic agent. Its application in neurosurgical hemostasis, however, has not been explored. Although RADA16‐I is nontoxic and nonimmunogenic, its intrinsic acidity may potentially provoke inflammation in the surgically injured brain. We conducted an animal study to compare RADA16‐I with fibrin sealant, a commonly used agent, with the hypothesis that the former would be a comparable alternative. Using a standardized surgical brain injury model, 30 Sprague–Dawley rats were randomized into three treatment groups: RADA16‐I, fibrin sealant or gelatin sponge (control). Animals were sacrificed on day 3 and 42. Astrocytic and microglial infiltrations within the cerebral parenchyma adjacent to the operative site were significantly lower in the RADA16‐I and fibrin sealant groups than control. RADA16‐I did not cause more cellular inflammatory response despite its acidity when compared with fibrin sealant. Immunohistochemical studies showed infiltration by astrocytes and microglia into the fibrin sealant and RADA16‐I grafts, suggesting their potential uses as tissue scaffolds. RADA16‐I is a promising candidate for further translational and clinical studies that focus on its applications as a safe and effective hemostat, proregenerative nanofiber scaffold as well as drug and cell carrier.
- Published
- 2015
20. 2.5D through silicon interposer package fabrication by chip-on-wafer (CoW) approach
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S. W. Ho, Tai Chong Chai, Guruprasad Katti, Pei Siang Lim, Mian Zhi Ding, Surya Bhattacharya, and Daniel Ismail Cereno
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Materials science ,Through-silicon via ,Silicon ,business.industry ,chemistry.chemical_element ,Thermocompression bonding ,Printed circuit board ,chemistry ,Chemical-mechanical planarization ,Electronic engineering ,Interposer ,Optoelectronics ,Wafer ,business ,Flip chip - Abstract
In this paper, the fabrication process and results of 2.5D through silicon interposer (TSI) package using polymer based RDL and chip-on-wafer (CoW) stacking-first approach is presented. The through silicon interposer is fabricated on a 300 mm silicon substrate with Cu filled vias of aspect ratio of 1:10. Fine-pitch Cu RDL using semi-additive process and polymer based dielectric is used to form the 3 layer of rerouting layer on front-side. Chips with micro-bumps are flip chip assembled onto the under bump metallization (UBM) of the 12 inch interposer substrate using thermal compression bonding via chip-on-wafer (CoW) format on the thick interposer substrate A wafer level molding process is used to form the over-mold encapulation over the assembled chips. The over-mold encapsulation is mechanically thinned down to reduce the warpage of the molded interposer and temporary bonded to a silicon carrier. Mechanical-grinding and chemical mechanical polishing (CMP) is used to expose the Cu vias from the backside. Cu-RDL process is used to form the backside re-routing layer and UBM for solder bumps. The completed interposer wafer is then diced into singulated packages for assembled to printed circuit board (PCB).
- Published
- 2014
21. Fluorescence Properties of π-Conjugated Polymers in Porous Silica
- Author
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Drahomír Výprachtický, S. W. Ho, T. K. Kwei, and Y. Okamoto
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chemistry.chemical_classification ,Materials science ,Polymers and Plastics ,Organic Chemistry ,Polymer ,Conjugated system ,Porous glass ,Photochemistry ,Fluorescence ,Inorganic Chemistry ,chemistry.chemical_compound ,Wavelength ,chemistry ,Excited state ,Polymer chemistry ,Materials Chemistry ,Porosity ,Ethylene glycol - Abstract
The fluorescence properties of poly(2,6-(4-phenylquinoline)) (PPQ) and poly(ethylene glycol)-b-poly(p-phenylene ethynylene)-b-poly(ethylene glycol) (triblock) within porous glass were investigated. Emission was shifted to different wavelengths by varying the pore size. The emission shift is attributed to the unique aggregation state at each pore size. At small pore sizes (∼8 nm), the polymers emit lights as the monomer-like states (490 nm for PPQ and 420 nm for triblock when excited at 365 nm). The emission shifts to the red region as the pore size increases until it reaches 30 nm at which PPQ emits light at 545 nm and triblock at 500 nm. As the pore size continues to increase, there is sufficient space for the relatively smaller PPQ to orient in different directions, reducing the interchain interaction and causing the emission to be blue-shifted to ∼500 nm. The bulky triblock, however, prevents the polymer from orienting randomly, obliging the chains to align in a relatively planar geometry and retaining...
- Published
- 2003
22. Prevalence and predictors of renal artery stenosis in Chinese patients with coronary artery disease
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D. S. W. Ho, Y. Q. Wang, W. F. Lam, Y. Wang, M. Chui, Z. J. Shen, C. Z. Lu, and W. H. Chen
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medicine.medical_specialty ,business.industry ,Atherosclerotic cardiovascular disease ,food and beverages ,biochemical phenomena, metabolism, and nutrition ,medicine.disease ,Renal artery stenosis ,Nephropathy ,carbohydrates (lipids) ,Coronary artery disease ,Stenosis ,Abdominal aortogram ,medicine.artery ,Internal medicine ,Epidemiology ,Internal Medicine ,medicine ,Cardiology ,heterocyclic compounds ,lipids (amino acids, peptides, and proteins) ,Renal artery ,business - Abstract
Background: Ischaemic nephropathy is currently a major public health issue in atherosclerotic populations. Although atherosclerotic cardiovascular disease in Asia has reached epidemic proportions over the last two decades, there is little published data on the prevalence of atherosclerotic renal artery stenosis (ARAS) in Oriental subjects. Because ARAS may be clinically silent until end-stage renal failure sets in, it is important to identify patients with significant but clinically unsuspected ARAS. ARAS and coronary artery disease (CAD) often coexist. Aims: The purpose of the present study was to evaluate the prevalence and predictors of ARAS among Chinese patients with CAD. Methods: A total of 230 consecutive Chinese patients with CAD confirmed by coronary angiography underwent an abdominal aortogram in the same sitting to screen for ARAS. Patient demographics and comorbidities were analysed for any association with ARAS. Results: A total of 34 (14.8%) patients was found to have significant ARAS. Age and multivessel CAD were independent predictors of ARAS. Hypertension, renal insufficiency, extracranial cerebrovascular disease and female gender were also associated with a higher risk of ARAS but did not independently predict ARAS. Conclusion: Clinically silent yet angiographically significant ARAS is common among CAD patients. The prevalence and predictors of ARAS among Chinese patients with CAD are similar to those reported for Caucasian subjects. Underlying ARAS should be suspected in CAD patients with such comorbidities as hypertension, renal insufficiency, extracranial cerebrovascular disease, and more so in the elderly and those with multivessel disease. (Intern Med J 2003; 33: 280−285)
- Published
- 2003
23. Distinct effects of platelet-rich plasma and BMP13 on rotator cuff tendon injury healing in a rat model
- Author
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Daniel P. Mass, Maureen Beederman, Joseph D. Lamplot, Bryan Scott, Christian C. Skjong, Sherwin S. W. Ho, Richard W. Kang, Michael Angeline, Lewis L. Shi, Farbod Rastegar, Jovito Angeles, and Eric R. Wagner
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Male ,Vascular Endothelial Growth Factor A ,medicine.medical_specialty ,Pathology ,Rat model ,Green Fluorescent Proteins ,Becaplermin ,Physical Therapy, Sports Therapy and Rehabilitation ,Bone morphogenetic protein ,law.invention ,Adenoviridae ,Rotator Cuff Injuries ,Rats, Sprague-Dawley ,Transforming Growth Factor beta1 ,Rotator Cuff ,law ,medicine ,Animals ,Orthopedics and Sports Medicine ,Rotator cuff ,Microscopy ,Wound Healing ,biology ,business.industry ,Platelet-Rich Plasma ,Reverse Transcriptase Polymerase Chain Reaction ,Proto-Oncogene Proteins c-sis ,Surgery ,Tendon ,Fibronectins ,Up-Regulation ,medicine.anatomical_structure ,Collagen Type III ,Platelet-rich plasma ,Bone Morphogenetic Proteins ,Models, Animal ,Recombinant DNA ,biology.protein ,Stress, Mechanical ,business ,Platelet-derived growth factor receptor ,Transforming growth factor - Abstract
Background:Although platelet-rich plasma (PRP) is used clinically to augment tendon healing, bone morphogenetic protein–13 (BMP13) may provide a better therapeutic avenue to improve early tendon healing and repair.Hypothesis:Exogenous expression of BMP13 in tenocytes will up-regulate genes involved in tendon healing. Direct delivery of adenovirus-mediated BMP13 (AdBMP13) into the injured rat supraspinatus tendon will increase biomechanical properties.Study Design:Controlled laboratory study.Methods:Exogenous expression of BMP13 and the major growth factors in PRP (transforming growth factor–β1 [TGF-β1], vascular endothelial growth factor–A [VEGF-A], and platelet-derived growth factor–BB [PDGF-BB]) was accomplished by using recombinant adenoviral vectors. The expression of tendon- and matrix-associated genes in growth factor–treated tenocytes was analyzed by use of semiquantitative reverse-transcription polymerase chain reaction. A total of 32 rats with supraspinatus defect were divided into 4 groups and injected with adenovirus-containing green fluorescent protein (AdGFP; negative control), PRP, AdBMP13, or PRP+AdBMP13. All rats were sacrificed at 2 weeks after surgery, and tendons were harvested for biomechanical testing and histologic analysis.Results:BMP13 up-regulated type III collagen expression compared with AdGFP control and PRP growth factors ( P < .01). BMP13 and PRP growth factors each up-regulated fibronectin expression ( P < .01). There was an increase in stress to failure in each of the 3 treatment groups ( P < .05 for PRP; P < .01 for AdBMP13 or PRP+AdBMP13) compared with AdGFP control. AdBMP13 demonstrated higher stress to failure than did the PRPs ( P < .01). The addition of PRP did not increase the BMP13-enhanced stress to failure or stiffness. The biomechanical results were further supported by histologic analysis of the retrieved samples.Conclusion:Exogenous expression of BMP13 enhances tendon healing more effectively than PRP as assessed by tendon- and matrix-associated gene expression, biomechanical testing, and histologic analysis.Clinical Relevance:While PRP is used in the clinical setting, BMP13 may be explored as a superior biofactor to improve rotator cuff tendon healing and reduce the incidence of retears.
- Published
- 2014
24. Hyperoxia resensitizes chemoresistant glioblastoma cells to temozolomide through unfolded protein response
- Author
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Derek, Lee, Stella, Sun, Amy S W, Ho, Karrie M Y, Kiang, Xiao Qin, Zhang, Fei Fan, Xu, and Gilberto K K, Leung
- Subjects
Brain Neoplasms ,Blotting, Western ,Procollagen-Proline Dioxygenase ,Protein Disulfide-Isomerases ,Apoptosis ,Hyperoxia ,Endoplasmic Reticulum Stress ,Combined Modality Therapy ,Dacarbazine ,Drug Resistance, Neoplasm ,Temozolomide ,Tumor Cells, Cultured ,Unfolded Protein Response ,Humans ,Glioblastoma ,Antineoplastic Agents, Alkylating ,Cell Proliferation - Abstract
Intratumoural hypoxia is associated with chemoresistance in glioblastoma multiforme (GBM), a highly malignant brain tumour. Adaptive response to endoplasmic reticulum stress induced by temozolomide is a major obstacle in recurrent GBM. We investigated whether hyperoxia resensitizes temozolomide-resistant GBM cells to temozolomide by abrogating the hypoxia-induced, unfolded protein response (UPR)-related protective mechanisms.We examined changes to key UPR modulators in temozolomide-sensitive and -resistant human GBM cells (D54 and U87) treated with/without temozolomide at different oxygen concentrations using western blotting, and cytotoxic benefits of overexpressing key chaperone, P4HB, in GBM cells (U87 and U251) under normoxia and hyperoxia.Hyperoxia, alone or synergistically with temozolomide, activated the UPR in sensitive and resistant D54 and U87 cell lines. Hyperoxia also reduced survival benefit of U87 and U251 cells with P4HB overexpression through the UPR.Hyperoxia enhanced GBM cell sensitivity to temozolomide, likely through UPR, highlighting an important treatment modality targeting chemosensitive and -resistant GBM.
- Published
- 2014
25. Polymer-based fine pitch Cu RDL to enable cost-effective re-routing for 2.5D interposer and 3D-IC
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G. Q. Lo, Mingbin Yu, S. W. Ho, Song How Lim, Soon Ann Sek, and Liang Ding
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Materials science ,business.industry ,Contact resistance ,Electrical engineering ,Three-dimensional integrated circuit ,Highly accelerated stress test ,law.invention ,Electrical resistance and conductance ,law ,Interposer ,Integrated circuit packaging ,Composite material ,Resistor ,business ,Daisy chain - Abstract
In this paper, 2 metal layers, very fine pitch Cu RDL process using spin-on photo-pattern-able polymer based material was demonstrated, with Cu wiring of a minimum of 2-μm/2-μm line/space (L/S) and dielectric via diameter of 2 μm. Electrical test structures were designed and fabricated to assess the performance of the Cu RDL process. Meander fork structures of 2-μm/2-μm L/S was used to measure the leakage current. The leakage current ranged from 1 to 6 pA for the different line lengths evaluated, indicating good insulation property of the polymer material. Daisy chain structure was used to measure the electrical resistance with different via numbers pitches. From the measurement, the resistance of the daisy chain structure increases with the number of vias. Single via resistance was also measured with Cross Bridge Kelvin Resistor (CBKR) structure. The measured contact resistance of 2-μm diameter via is ~20 mΩΣ The reliability of the Cu RDL process was also evaluated by subjecting the wafers to Unbiased Highly Accelerated Stress Test (uHAST). The daisy chain structures measurement shows no significant change in electrical resistance after the reliability test, indicating good reliability of the Cu RDL process.
- Published
- 2013
26. Investigation on decap shift and incomplete fill issues in the wafer level compression molding process
- Author
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Ser Choong Chong, Booyang Jung, T. C. Chai, Sorono Dexter Velez, Boyu Zheng, Lin Bu, S. W. Ho, and Xiaowu Zhang
- Subjects
Engineering ,education.field_of_study ,business.industry ,Population ,Compression molding ,Chip ,Short distance ,Printed circuit board ,Noise ,Drag ,Electronic engineering ,Wafer ,business ,education - Abstract
Decaps are the panacea to cure the noise related issues. Due to the short distance advantage, decaps were embedded in the package instead of PCB. These decaps, generally having higher thickness than chips, would play a vital role in the wafer level molding process. Improper population will cause decap shift and incomplete fill issues. In the present paper, proper arrangement of decaps were designed and optimized. The results show that decaps placed along two adjacent sides rather than two opposite sides of the chip would result in better filling. In order to further reduce the drag force on decaps, chip to decap distance should be as large as possible. This implies that narrow gaps would result in higher drag force. Therefore, narrow gaps should be avoided to ease the drag force in the package as well as the whole wafer.
- Published
- 2013
27. EXPERIMENTAL THERAPEUTICS AND PHARMACOLOGY
- Author
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C. Aaberg-Jessen, L. Fogh, B. Halle, V. Jensen, N. Brunner, B. W. Kristensen, T. Abe, Y. Momii, J. Watanabe, I. Morisaki, A. Natsume, T. Wakabayashi, M. Fujiki, B. Aldaz, A. W. M. Fabius, J. Silber, G. Harinath, T. A. Chan, J. T. Huse, S. Anai, T. Hide, H. Nakamura, K. Makino, S. Yano, J.-i. Kuratsu, I. V. Balyasnikova, M. S. Prasol, D. K. Kanoija, K. S. Aboody, M. S. Lesniak, T. Barone, C. Burkhart, A. Purmal, A. Gudkov, K. Gurova, R. Plunkett, K. Barton, K. Misuraca, F. Cordero, E. Dobrikova, H. Min, M. Gromeier, D. Kirsch, O. Becher, L. B. Pont, J. Kloezeman, M. van den Bent, R. Kanaar, A. Kremer, S. Swagemakers, P. French, C. Dirven, M. Lamfers, S. Leenstra, R. Balvers, A. Kleijn, S. Lawler, X. Gong, A. Andres, J. Hanson, J. Delashaw, D. Bota, C.-C. Chen, N.-W. Yao, W.-J. Chuang, C. Chang, P.-Y. Chen, C.-Y. Huang, K.-C. Wei, Y. Cheng, Q. Dai, R. Morshed, Y. Han, B. Auffinger, D. Wainwright, L. Zhang, A. Tobias, E. Rincon, B. Thaci, A. Ahmed, C. He, M. Lesniak, Y. A. Choi, H. Pandya, D. M. Gibo, I. Fokt, W. Priebe, W. Debinski, Y. Chornenkyy, S. Agnihotri, P. Buczkowicz, P. Rakopoulos, A. Morrison, M. Barszczyk, C. Hawkins, S. Chung, S. Decollogne, P. Luk, H. Shen, W. Ha, B. Day, B. Stringer, P. Hogg, P. Dilda, K. McDonald, S. Moore, M. Hayden-Gephart, J. Bergen, Y. Su, H. Rayburn, M. Edwards, M. Scott, J. Cochran, A. Das, A. K. Varma, G. C. Wallace, Y. N. Dixon-Mah, W. A. Vandergrift, P. Giglio, S. K. Ray, S. J. Patel, N. L. Banik, T. Dasgupta, A. Olow, X. Yang, S. Mueller, M. Prados, C. D. James, D. Haas-Kogan, N. D. Dave, P. B. Desai, G. A. Gudelsky, L. M. L. Chow, K. LaSance, X. Qi, J. Driscoll, K. Ebsworth, M. J. Walters, L. S. Ertl, Y. Wang, R. D. Berahovic, J. McMahon, J. P. Powers, J. C. Jaen, T. J. Schall, Z. Eroglu, J. Portnow, A. Sacramento, E. Garcia, A. Raubitschek, T. Synold, S. Esaki, S. Rabkin, R. Martuza, H. Wakimoto, S. Ferluga, C. L. Tome, H. E. Forde, I. A. Netland, L. Sleire, B. Skeie, P. O. Enger, D. Goplen, M. Giladi, A. Tichon, R. Schneiderman, Y. Porat, M. Munster, M. Dishon, U. Weinberg, E. Kirson, Y. Wasserman, Y. Palti, D. Gramatzki, M. Staudinger, K. Frei, M. Peipp, M. Weller, C. Grasso, L. Liu, N. Berlow, L. Davis, M. Fouladi, A. Gajjar, E. Huang, E. Hulleman, M. Hutt, C. Keller, X.-N. Li, P. Meltzer, M. Quezado, M. Quist, E. Raabe, P. Spellman, N. Truffaux, D. van Vurden, N. Wang, K. Warren, R. Pal, J. Grill, M. Monje, A. L. Green, S. Ramkissoon, D. McCauley, K. Jones, J. A. Perry, L. Ramkissoon, C. Maire, S. Shacham, K. L. Ligon, A. L. Kung, K. Zielinska-Chomej, V. Grozman, J. Tu, K. Viktorsson, R. Lewensohn, S. Gupta, A. Mladek, K. Bakken, B. Carlson, F. Boakye-Agyeman, S. Kizilbash, M. Schroeder, J. Reid, J. Sarkaria, P. Hadaczek, T. Ozawa, L. Soroceanu, Y. Yoshida, L. Matlaf, E. Singer, E. Fiallos, C. S. Cobbs, R. Hashizume, M. Tom, Y. Ihara, R. Santos, J. D. L. Torre, E. Lepe, T. Waldman, D. James, X. Huang, L. Yu-Jen, N. Gupta, D. Solomon, Z. Zhang, T. Hayashi, K. Adachi, S. Nagahisa, M. Hasegawa, Y. Hirose, M. H. Gephart, Y. S. Su, S. Hingtgen, R. Kasmieh, I. Nesterenko, J.-L. Figueiredo, R. Dash, D. Sarkar, P. Fisher, K. Shah, E. Horne, P. Diaz, N. Stella, C. Huang, H. Yang, K. Wei, T. Huang, J. Hlavaty, D. Ostertag, F. L. Espinoza, B. Martin, H. Petznek, M. Rodriguez-Aguirre, C. Ibanez, N. Kasahara, W. Gunzburg, H. Gruber, D. Pertschuk, D. Jolly, J. Robbins, B. Hurwitz, J. Y. Yoo, C. Bolyard, J.-G. Yu, J. Wojton, J. Zhang, Z. Bailey, D. Eaves, T. Cripe, M. Old, B. Kaur, L. Serwer, N. Le Moan, S. Ng, N. Butowski, A. Krtolica, S. P. L. Cary, T. Johns, S. Greenall, J. Donoghue, T. Adams, G. Karpel-Massler, M.-A. Westhoff, R. E. Kast, A. Dwucet, C. R. Wirtz, K.-M. Debatin, M.-E. Halatsch, N. Merkur, F. Kievit, Z. Stephen, K. Wang, D. Kolstoe, R. Ellenbogen, M. Zhang, G. Kitange, E. Haefner, K. Knubel, B. M. Pernu, A. Sufit, A. M. Pierce, S. K. Nelson, A. K. Keating, S. S. Jensen, J. Lachowicz, M. Demeule, A. Regina, S. Tripathy, J.-C. Curry, T. Nguyen, J.-P. Castaigne, T. Davis, A. Davis, K. Tanaka, T. Keating, J. Getz, G. T. Kapp, J. M. Romero, S. Lee, S. Ramisetti, B. Slagle-Webb, A. Sharma, J. Connor, W.-S. Lee, M. Kluk, J. C. Aster, K. Ligon, S. Sun, D. Lee, A. S. W. Ho, J. K. S. Pu, Z.-q. Zhang, N. P. Lee, P. J. R. Day, G. K. K. Leung, Z. Liu, X. Liu, A. B. Madhankumar, P. Miller, B. Webb, J. R. Connor, Q. X. Yang, M. Lobo, S. Green, M. Schabel, Y. Gillespie, R. Woltjer, M. Pike, Y.-J. Lu, H. A. Luchman, O. Stechishin, S. Nguyen, J. G. Cairncross, S. Weiss, X. Lun, J. C. Wells, X. Hao, N. Grinshtein, D. Kaplan, A. Luchman, D. Senger, S. Robbins, A. Madhankumar, E. Rizk, R. Payne, A. Park, M. Pang, K. Harbaugh, A. Wilisch-Neumann, D. Pachow, E. Kirches, C. Mawrin, S. McDonell, J. Liang, Y. Piao, N. Nguyen, A. Yung, R. Verhaak, E. Sulman, C. Stephan, F. Lang, J. de Groot, Y. Mizobuchi, T. Okazaki, T. Kageji, K. Kuwayama, K. T. Kitazato, H. Mure, K. Hara, R. Morigaki, K. Matsuzaki, K. Nakajima, S. Nagahiro, S. Kumala, M. Heravi, S. Devic, T. Muanza, K. H. Knubel, A. Neuwelt, Y. J. Wu, A. Donson, R. Vibhakar, S. Venkatamaran, V. Amani, E. Neuwelt, L. Rapkin, N. Foreman, F. Ibrahim, P. New, K. Cui, H. Zhao, D. Chow, W. Stephen, K. Nozue-Okada, M. Nagane, K. L. McDonald, D. Ogawa, E. Chiocca, J. Godlewski, A. Patel, N. Pasupuleti, F. Gorin, A. Valenzuela, L. Leon, K. Carraway, C. Ramachandran, S. Nair, K.-W. Quirrin, Z. Khatib, E. Escalon, S. Melnick, A. Phillips, E. Boghaert, K. Vaidya, P. Ansell, D. Shalinsky, Y. Zhang, M. Voorbach, S. Mudd, K. Holen, R. Humerickhouse, E. Reilly, S. Parab, O. Diago, T. Ryken, S. Agarwal, M. Al-Keilani, M. Alqudah, Z. Sibenaller, M. Assemolt, K. Sai, W.-y. Li, W.-p. Li, Z.-p. Chen, R. Saito, Y. Sonoda, M. Kanamori, Y. Yamashita, T. Kumabe, T. Tominaga, G. Sarkar, G. Curran, R. Jenkins, R. Scharnweber, Y. Kato, J. Lin, R. Everson, H. Soto, C. Kruse, L. Liau, R. Prins, S. Semenkow, Q. Chu, C. Eberhart, R. Sengupta, J. Marassa, D. Piwnica-Worms, J. Rubin, R. Shai, T. Pismenyuk, I. Moshe, T. Fisher, S. Freedman, A. Simon, N. Amariglio, G. Rechavi, A. Toren, M. Yalon, Y. Shimazu, K. Kurozumi, T. Ichikawa, K. Fujii, M. Onishi, J. Ishida, T. Oka, M. Watanabe, Y. Nasu, H. Kumon, I. Date, R. W. Sirianni, R. L. McCall, J. Spoor, M. van der Kaaij, M. Geurtjens, O. Veiseh, C. Fang, M. Leung, G. Strohbehn, K.-K. Atsina, T. Patel, J. Piepmeier, J. Zhou, W. M. Saltzman, M. Takahashi, G. Valdes, A. Inagaki, S. Kamijima, K. Hiraoka, E. Micewicz, W. H. McBride, K. S. Iwamoto, H. E. Gruber, J. M. Robbins, D. J. Jolly, C. McCully, J. Bacher, T. Thomas, R. Murphy, E. Steffen-Smith, R. McAllister, D. Pastakia, B. Widemann, P. Chen, M. Hua, H. Liu, E. C. Woolf, M. G. Abdelwahab, K. E. Fenton, Q. Liu, G. Turner, M. C. Preul, A. C. Scheck, W. Shen, D. Brown, H. Pedersen, S. Hariono, T.-W. Yao, A. Sidhu, W. A. Weiss, T. P. Nicolaides, and T. Olusanya
- Subjects
Cancer Research ,Abstracts ,Oncology ,business.industry ,Medicine ,Neurology (clinical) ,Pharmacology ,business - Published
- 2013
28. Fatal Hemorrhagic Transformation of Acute Cerebral Infarction After the Use of Abciximab
- Author
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Raymond T.F. Cheung and David S. W. Ho
- Subjects
Advanced and Specialized Nursing ,medicine.medical_specialty ,Aspirin ,business.industry ,Cerebral infarction ,Placebo ,medicine.disease ,Asymptomatic ,Surgery ,Anesthesia ,Concomitant ,Antithrombotic ,Abciximab ,Medicine ,Platelet aggregation inhibitor ,Neurology (clinical) ,medicine.symptom ,Cardiology and Cardiovascular Medicine ,business ,medicine.drug - Abstract
To the Editor: The Abciximab in Ischemic Stroke Investigators reported the encouraging results of their randomized, double-blind, placebo-controlled, dose-escalation trial.1 Of 74 eligible and consenting patients presenting within 24 hours of onset of their ischemic stroke, 54 patients were treated with 4 escalating doses of intravenous abciximab and 20 patients with placebo. The scheduled post-study CT brain scan detected asymptomatic parenchymal hemorrhages in 7% of abciximab-treated patients and 5% of placebo-treated patients; another 11% of abciximab-treated patients had asymptomatic parenchymal hemorrhages on unscheduled brain imaging (CT or MRI) performed on days 2 through 35. Symptomatic hemorrhagic transformation was not seen, while asymptomatic parenchymal hemorrhages were associated with a higher baseline National Institute of Health Stroke Scale (NIHSS) score. We would raise the following issue for clarification by the authors and report our limited experience of using abciximab in Chinese stroke patients. Concomitant use of antithrombotic medications during the time period of diagnosing parenchymal hemorrhage was listed in Table 3 of the article.1 The scheduled CT brain scan detected asymptomatic parenchymal hemorrhages in patients A, D, G, H, and I, who also received concomitant antithrombotic medications, such as systemic heparin, low-dose heparin, aspirin, and warfarin sodium. Nevertheless, the study protocol required that antiplatelet agents or anticoagulants not be administered until the results of the scheduled CT brain scan became available (as …
- Published
- 2000
29. Intraarticular Anterior Cruciate Ligament Graft Placement on the Average Most Isometric Line on the Femur
- Author
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Louis F. Draganich, Sherwin S. W. Ho, Yeou-Fang Hsieh, and Bruce Reider
- Subjects
musculoskeletal diseases ,030222 orthopedics ,business.industry ,Anterior cruciate ligament ,Physical Therapy, Sports Therapy and Rehabilitation ,030229 sport sciences ,Isometric exercise ,Anatomy ,musculoskeletal system ,Transplantation ,03 medical and health sciences ,surgical procedures, operative ,0302 clinical medicine ,medicine.anatomical_structure ,Cadaver ,Ligament ,medicine ,Orthopedics and Sports Medicine ,Femur ,Cadaveric spasm ,Range of motion ,business ,human activities - Abstract
In the past, there has been a plausible hypothesis that anterior cruciate ligament graft placement at isometric sites, such that the tibial and femoral attachment sites remain equidistant from each other throughout knee range of motion, would increase the likelihood of a satisfactory outcome. For a given tibial placement we wanted to determine whether placing the graft on the average of the most isometric femoral line, a fixed distance from the outlet of the intercondylar notch, would return normal laxity to all knees. The three-dimensional kinematics of seven cadaveric knees were measured for angles from full extension to 90° of flexion at 15° increments. Physiologic levels of quadriceps muscle forces were applied to the intact knee, after transection of the anterior cruciate ligament, and after ligament reconstruction with a patellar tendon graft. On average, the reconstruction was found to return anterior-posterior translation, internal-external rotation, and varus-valgus rotation to levels not significantly different from those of the intact knee. However, the ranges of the translation and rotations were large. Placing the graft on the average most isometric femoral line did not restore knee laxity to normal in all knees. This supports the need to customize graft placement in each knee at the time of surgery.
- Published
- 1999
30. Increasing incidence of nosocomialChryseobacterium indologenes infections in Taiwan
- Author
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Kwen-Tay Luh, Wei-Chuan Hsieh, Lee-Jene Teng, Pan-Chyr Yang, S. W. Ho, and Po-Ren Hsueh
- Subjects
Adult ,DNA, Bacterial ,Microbiology (medical) ,medicine.medical_specialty ,Adolescent ,Chryseobacterium indologenes ,Molecular Sequence Data ,Taiwan ,Bacteremia ,Microbial Sensitivity Tests ,Drug resistance ,Flavobacterium ,Polymerase Chain Reaction ,Medical microbiology ,Internal medicine ,Humans ,Medicine ,Child ,Aged ,Antibacterial agent ,Cross Infection ,Base Sequence ,business.industry ,Incidence ,Incidence (epidemiology) ,Infant ,General Medicine ,Middle Aged ,medicine.disease ,Antimicrobial ,Drug Resistance, Multiple ,Anti-Bacterial Agents ,Surgery ,Survival Rate ,Pneumonia ,Infectious Diseases ,Child, Preschool ,Gram-Negative Bacterial Infections ,business - Abstract
To understand the clinical features, antimicrobial therapy, and epidemiology of Chryseobacterium indologenes infections, the medical records of 36 patients with nosocomial Chryseobacterium indologenes infections seen over a three-year period at National Taiwan University Hospital were reviewed. The 36 isolates recovered from these patients were studied by molecular typing and determination of antimicrobial susceptibility patterns. Nine patients had underlying neoplastic diseases, seven had diabetes mellitus, five had burn wounds, and four had uremia. The clinical syndrome included ten patients with intraabdominal infections, nine with wound sepsis, six with intravascular catheter-related bacteremia, and four with ventilator-associated pneumonia. Thirteen patients had monomicrobial bacteremia, and four had polymicrobial bacteremia. Nineteen patients (53%) developed infections associated with various indwelling devices. The deaths of five patients (14%) were directly attributable to infection with Chryseobacterium indologenes. All isolates recovered showed a wide range of resistance to commonly used antimicrobial agents. The random amplified polymorphic DNA (RAPD) patterns of the isolates differed from each other, indicating the absence of epidemiological relatedness among these isolates. Nosocomial infection caused by multiresistant Chryseobacterium indologenes appears to be an emerging problem in Taiwan and should be studied further.
- Published
- 1997
31. Enumeration of E. coli in environmental waters and wastewater using a chromogenic medium
- Author
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T.-Y. Tam and B. S. W. Ho
- Subjects
Environmental Engineering ,Water Science and Technology - Abstract
CHROMagar Liquid ECC (CLECC) was compared with membrane lauryl sulphate broth plus urea (mLS-UA) used routinely in Hong Kong for E. coli enumeration. E. coli appear as distinctive greenish-blue colonies on CLECC while other faecal coliforms are red in colour. CLECC performance was comparable to mLS with mixtures of faecal coliforms, E. coli and non-faecal coliforms. Beach, river, ground and waste water samples were used for further comparison. Results given by the two media were significantly correlated (P =
- Published
- 1997
32. Major Signaling Pathways Regulating the Proliferation and Differentiation of Mesenchymal Stem Cells
- Author
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Jinhua Wang, Guoxin Nan, Ruidong Li, Wei Shui, Hongyu Zhang, Lewis L. Shi, Xing Liu, Hue H. Luu, Joseph D. Lamplot, Ning Wang, Sahitya K. Denduluri, Liangjun Yin, Tong-Chuan He, Jovito Angeles, Rex C. Haydon, and Sherwin S. W. Ho
- Subjects
Crosstalk (biology) ,Cell signaling ,Adipogenesis ,Cellular differentiation ,Wnt signaling pathway ,Notch signaling pathway ,Biology ,Signal transduction ,Fibroblast growth factor ,Cell biology - Abstract
Various highly regulated, complex signaling pathways govern the lineage-specific differentiation of mesenchymal stem cells (MSCs). The unique properties of MSCs have allowed us to characterize the differentiation pathways and proliferative stimuli of these lineages. While the specific signaling cascades controlling differentiation and proliferation are unique among each lineage, some pathways are critical in the differentiation of multiple lineages. Furthermore, a considerable amount of crosstalk exists between the major signaling pathways. The TGF-β superfamily has significant effects on proliferation and differentiation, including key roles in osteogenic and chondrogenic differentiation. Bone morphogenetic proteins (BMPs) are members of the TGF-β superfamily with well-described effects on osteogenesis and chondrogenesis. Demonstrating crosstalk with BMPs, other signaling pathways implicated in osteogenic and chondrogenic differentiation include the Wnt signaling pathway and the FGF family. Hedgehog and notch signaling also crosstalk with Wnts, with diverse effects on osteogenic, myogenic and adipogenic differentiation. PPARγ is the master regulator of adipogenesis and is essential for the induction of normal adipogenesis, and C/EBPs modulate the expression and function of PPARγ. Crosstalk exists between the major signaling pathways governing adipogenesis and osteogenesis, as differential expression of BMPs and PPARγ significantly alters adipogenic and osteogenic differentiation. While the major signaling pathways mediating lineage-specific differentiation are well-studied, the complex crosstalk between these pathways and lineage-specific cascades makes elucidation of specific mechanisms quite difficult.
- Published
- 2013
33. The Effects of Ice on Blood Flow and Bone Metabolism in Knees
- Author
-
Robert Kagawa, Sherwin S. W. Ho, Allen B. Richardson, and Marc N. Coel
- Subjects
Adult ,Male ,medicine.medical_specialty ,Time Factors ,chemistry.chemical_element ,Physical Therapy, Sports Therapy and Rehabilitation ,Technetium ,Bone and Bones ,Bone remodeling ,03 medical and health sciences ,Sex Factors ,0302 clinical medicine ,Image Processing, Computer-Assisted ,Humans ,Medicine ,Knee ,Orthopedics and Sports Medicine ,Radionuclide Imaging ,030222 orthopedics ,Diphosphonates ,business.industry ,Ice ,Age Factors ,Biomechanics ,Computer image ,Skin temperature ,Soft tissue ,030229 sport sciences ,Blood flow ,Middle Aged ,Surgery ,Technetium Compounds ,chemistry ,Large joint ,Linear Models ,Female ,Skin Temperature ,business ,Nuclear medicine ,human activities - Abstract
The effects of an ice wrap, applied to a knee for 20 minutes, on blood flow and bone metabolism were measured using triple-phase technetium bone scans. Twenty-one subjects between 29 and 63 years of age were studied. A commercially available ice wrap was applied to one knee 20 minutes before scanning, while an identical wrap left at room temperature was applied to the opposite knee to act as a control. Scans of the knees were obtained at the completion of cooling, and the images were quantified by computer image analysis for each knee at each phase of the scan. Percentage of decrease in blood flow and subsequent bone uptake of technetium for the iced knee as compared with the op posite knee were calculated. All iced knees demon strated decreased arterial and soft tissue blood flow as well as decreased bone uptake, which is a reflection of changes in both bone blood flow and metabolism. The average decrease was 38.4% ± 4.97 in arterial blood flow, 25.8% ± 2.04 in soft tissue blood flow, and 19.3% ± 2.0 (standard error of the mean in each) in bone up take. This "ice effect" was not related to age, sex, knee circumference, or skin temperature after cooling. By de creasing blood flow and cell metabolism, ice theoreti cally can limit hemorrhage and cell death in the setting of acute traumatic injury. This study thus provides a scientific rationale for the use of ice as tested for such injuries to a large joint, whether in the soft tissues or bones.
- Published
- 1994
34. Predictors of thrombotic complications after placement of the flexible coil stent
- Author
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Gary S. Roubin, Actam D. Cannon, James A. Hearn, William A. Baxley, Larry S. Dean, Peter J. Macander, Subodh K. Agrawal, Ming W. Liu, Sriram S. Iyer, and David S. W. Ho
- Subjects
Male ,medicine.medical_specialty ,Percutaneous ,medicine.medical_treatment ,Myocardial Infarction ,Myocardial Ischemia ,Coronary Disease ,Recurrence ,medicine ,Humans ,cardiovascular diseases ,Stent thrombosis ,Angioplasty, Balloon, Coronary ,Vascular disease ,business.industry ,Coronary Thrombosis ,Coronary Aneurysm ,Stent ,Middle Aged ,equipment and supplies ,medicine.disease ,Thrombosis ,Surgery ,Aortic Dissection ,surgical procedures, operative ,Female ,Stents ,Radiology ,Cardiology and Cardiovascular Medicine ,business ,Complication ,Thrombotic complication ,Follow-Up Studies ,Forecasting - Abstract
The balloon-expandable, stainless steel, flexible coil stent is a useful device for managing acute or threatened closure after percutaneous transluminal coronary angioplasty.1–5 Use of the device is associated with thrombosis of the stented vessel in a small but important group of patients.3,6–10 The clinical, angiographic, and procedural factors associated with stent thrombosis with this device are still unknown. The objective of this study was to define predictors of stent thrombosis occurring within the ftrst month after stenting with this device.
- Published
- 1994
35. Photoluminescence behavior of poly(quinoline)s in silica glasses via the sol–gel process
- Author
-
S. W. Ho, Y. Okamoto, T. K. Kwei, and Wen-Yao Huang
- Subjects
chemistry.chemical_classification ,Photoluminescence ,Materials science ,Physics and Astronomy (miscellaneous) ,Silica glass ,Quinoline ,Polymer ,Full color ,Conjugated system ,Photochemistry ,Spectral line ,chemistry.chemical_compound ,chemistry ,Sol-gel - Abstract
A full color display with its spectra covering the entire visible color range using a single polymer is presented here. Different concentrations of poly(2,6-[4-phenylquinoline]) and poly(2,6-[p-phenylene]-4-phenylquinoline) were incorporated into silica gels via the sol–gel technique. At high concentrations, the conjugated polymers form multiple excimers in the channels within the silica network, leading to the emission of red light (∼600 nm). At low concentrations, the polymer chains are isolated and are being trapped individually in the silica domain, which results in the emission of blue light (∼400 nm). For concentrations in-between, moderate extensive chain interaction leads to the emission of green, yellow, and orange colors. Therefore, the color tunability can be achieved by simply varying the concentration of quinoline polymers in the silica glasses.
- Published
- 2002
36. Electron spin decoherence in nuclear spin baths and dynamical decoupling
- Author
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N. Zhao, W. Yang, S. W. Ho, J. L. Hu, J. T. K. Wan, R. B. Liu, Jisoon Ihm, and Hyeonsik Cheong
- Subjects
Physics ,Dynamical decoupling ,Quantum decoherence ,Condensed matter physics ,Spin polarization ,Spins ,Quantum mechanics ,Condensed Matter::Strongly Correlated Electrons ,Spin engineering ,Electron ,Zero field splitting ,Spin (physics) - Abstract
We introduce the quantum theory of the electron spin decoherence in a nuclear spin bath and the dynamical decoupling approach for protecting the electron spin coherence. These theories are applied to various solid‐state systems, such as radical spins in molecular crystals and NV centers in diamond.
- Published
- 2011
37. A low stress bond pad design for low temperature solder interconnections on through silicon vias (TSVs)
- Author
-
Dim-Lee Kwong, Ranjan Rajoo, V. N. Sekhar, C.S. Premachandran, Won Kyoung Choi, Xiaowu Zhang, S. W. Ong, S. W. Ho, Ling Xie, Damaruganath Pinjala, and C. S. Selvanayagam
- Subjects
Stress (mechanics) ,Interconnection ,Materials science ,Soldering ,Ultimate tensile strength ,Metallurgy ,Intermetallic ,Shear strength ,Joint (geology) ,Drop impact - Abstract
Low temperature bonds are thin intermetallic bonds that are formed between devices when plated layers of different metals on each side of the component come into contact under relatively low temperature and high pressure. These joints comprised completely of intermetallic compounds, will fail in a sudden unexpected manner, compared to normal solder joints which fail in a ductile manner where cracks grow more slowly. This problem of weak interconnects is further exacerbated when these thin interconnections are formed on pads located above through-silicon vias (TSVs). When a change in temperature occurs, the mismatch in coefficient of thermal expansion (CTE) causes the copper inside the TSV to expand or contract much more than the surrounding silicon. This could result in unexpectedly high tensile stresses in the joints. This additional tensile stress on post-formation cooling to room temperature increases the likelihood of joint failure. This paper presents a novel pad design to overcome the situation of high stress in the joints. The proposed design does not involve any additional fabrication or material cost. Simulation results show that with the proposed pad design, the maximum tensile stress in the interconnect decreases by 50%. Reliability assessment has also done in order to compare the proposed pad design with the conventional design. It is found that the samples with the proposed design have a better drop impact reliability performance and higher shear strength than the samples with the usual pad design.
- Published
- 2010
38. Human growth hormone and the development of osteochondritis dissecans lesions
- Author
-
Waqas M. Hussain, Mohammed S. Hussain, Haroon M. Hussain, and Sherwin S. W. Ho
- Subjects
Male ,medicine.medical_specialty ,Adolescent ,Knee Joint ,Elbow ,Hormone replacement ,Knee Injuries ,Baseball ,behavioral disciplines and activities ,mental disorders ,Elbow Joint ,medicine ,Humans ,Orthopedics and Sports Medicine ,Right elbow ,medicine.diagnostic_test ,business.industry ,Human Growth Hormone ,Human growth hormone ,Arthroscopy ,medicine.disease ,Dermatology ,Osteochondritis dissecans ,Magnetic Resonance Imaging ,Osteochondritis Dissecans ,humanities ,Surgery ,medicine.anatomical_structure ,Orthopedic surgery ,Etiology ,Accidental Falls ,business - Abstract
No single etiology regarding the cause of osteochondritis dissecans (OCD) lesions is unanimously accepted. This report documents a novel case of multiple OCD lesions affecting the left knee and a solitary defect of the right elbow in a patient with acquired human growth hormone (hGH) deficiency and supplementation. hGH deficiency and hormone replacement may be related to the development of OCD lesions.
- Published
- 2010
39. Polymerase chain reaction for the detection of Neisseria gonorrhoeae in clinical samples
- Author
-
S. I. Egglestone, W. G. Feng, B. S. W. Ho, and B. K. C. Wong
- Subjects
Molecular Sequence Data ,medicine.disease_cause ,Polymerase Chain Reaction ,Pathology and Forensic Medicine ,Microbiology ,law.invention ,Species Specificity ,Urethra ,Antigen ,law ,medicine ,Humans ,Amino Acid Sequence ,Elisa method ,Polymerase chain reaction ,biology ,General Medicine ,biology.organism_classification ,Molecular biology ,Neisseria gonorrhoeae ,N gonorrhoeae ,Restriction enzyme ,Evaluation Studies as Topic ,Genes, Bacterial ,Cervix Mucus ,Neisseriaceae ,Bacteria ,Research Article - Abstract
AIMS: To evaluate the use of a cppB gene derived polymerase chain reaction (PCR) assay for direct detection of Neisseria gonorrhoeae in clinical samples. METHODS: A PCR assay was performed on 33 N gonorrhoeae strains and 12 other Neisseria species and other normal genital flora to evaluate the specificity of the chosen cppB primers. The assay was subsequently evaluated with 52 clinical swab samples collected from China. RESULTS: An amplified product of 390 base pairs (bp) was observed with all the N gonorrhoeae strains, each of these products on digestion with the restriction enzyme MspI produced two bands of 250 bp and 140 bp respectively. This set of primers did not produce any amplified product of the expected length with the other non-gonococcal strains tested. For the 52 clinical swabs, 34 were culture positive and PCR successfully detected all these positives. In addition the PCR was positive for two swabs which were culture negative but positive for N gonorrhoeae antigens when tested with the ELISA method (Gonozyme). CONCLUSIONS: This PCR assay is a promising diagnostic tool for detection of gonococci directly from clinical swab samples. Further evaluation is necessary.
- Published
- 1992
40. Design, Assembly and Reliability of Large Die (21 x 21mm2) and Fine-pitch (150pm) Cu/Low-K Flip Chip Package
- Author
-
John H. Lau, Z. Yanfeng, Yue Ying Ong, Xiaowu Zhang, S. W. Ho, Vempati Srinivasa Rao, J. Ong, V. N. Sekhar, Juan Boon Tan, Kai Chong Chan, Dong Kyun Sohn, Vincent Lee Wen Sheng, Y.K. Lim, Leong Ching Wai, Ming Chinq Jong, Xuefen Ong, Yoon Uk Seung, David Yeo, and Kripesh Vaidyanathan
- Subjects
Thermal copper pillar bump ,Materials science ,JEDEC memory standards ,Chip-scale package ,Soldering ,Electronic engineering ,Wafer ,Wafer dicing ,Redistribution layer ,Composite material ,Flip chip - Abstract
This paper focused on design, assembly and reliability assessments of 21 × 21 mm2 Cu/Low-K Flip Chip (65 nm technology) with 150 ?m bump pitch. Metal redistribution layer (RDL) and polymer encapsulated dicing lane (PEDL) were applied to the chip wafer to reduce the shear stress on the Cu/low-K layers and also the strain on the solder bumps. The first level interconnects evaluated were Pb-free (97.5Sn2.5Ag), High-Pb (95Pb5Sn) and Cu-post/95Pb5Sn. Two different die thicknesses, such as 750 ?m and 300 ?m, were evaluated. the flip chip assembly of high-pb test vehicles required the right choice of flux and special alignment between the high-pb solder bumps and substrate presolder to ensure proper solder bumps and substrate pre-solder alloy wetting. Finite Element Modeling (FEM) was performed to investigate the impact of different underfill, on the inelastic strain of the outermost bumps and shear stress in the Cu/low-K layer. JEDEC standard reliability were performed on the test vehicles with different first level interconnects, die thickness, underfill materials and dicing methods.
- Published
- 2008
41. Typhoid fever and typhoid hepatitis in Taiwan
- Author
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Jiun-Ling Wang, Lee-Jene Teng, Jia-Horng Kao, Sung-Pin Tseng, Po-Ren Hsueh, and S. W. Ho
- Subjects
medicine.medical_specialty ,Epidemiology ,medicine.drug_class ,Cephalosporin ,Population ,Taiwan ,Drug resistance ,Salmonella typhi ,Typhoid fever ,Disease Outbreaks ,Hepatitis ,Internal medicine ,Medicine ,Humans ,Typhoid Fever ,education ,education.field_of_study ,business.industry ,Chloramphenicol ,Outbreak ,Drug Resistance, Microbial ,medicine.disease ,bacterial infections and mycoses ,Virology ,Anti-Bacterial Agents ,Infectious Diseases ,business ,medicine.drug ,Research Article - Abstract
The annual incidence of typhoid fever in Taiwan was 2.1-3.6 cases per 1,000,000 population from 1995 to 2002. More than 80% of 45 patients with typhoid fever treated at National Taiwan University Hospital from 1996 to 2002 had elevated serum aminotransferase levels at presentation. Ten of these patients were treated during an outbreak in Taipei County in 2002, and seven of them who did not have pre-existing liver disease developed hepatitis, which was unrelated to other aetiologies. All Salmonella typhi isolates were susceptible to extended-spectrum cephalosporins and fluoroquinolones. Multidrug resistance (intermediate resistance to ampicillin, trimethoprim-sulphamethoxazole, and chloramphenicol) was found in one (2.5%) of the 40 isolates studied. Pulsed-field gel electrophoresis analysis demonstrated a high genetic diversity among S. typhi isolates and identified a novel clone associated with the 2002 outbreak. Physicians should be alert to the possibility of typhoid fever when patients, without other gastrointestinal symptoms, present with sustained fever and hepatitis.
- Published
- 2005
42. Re-emergence of meningococcal disease in Taiwan: circulation of domestic clones of Neisseria meningitidis in the 2001 outbreak
- Author
-
K. T. Chen, Po-Ren Hsueh, T. Y. Lin, H. M. Hsu, Kwen-Tay Luh, S. W. Ho, Lee-Jene Teng, and S. J. Twu
- Subjects
Adult ,DNA, Bacterial ,Male ,Adolescent ,Genotype ,Epidemiology ,Population ,Taiwan ,Microbial Sensitivity Tests ,Meningitis, Meningococcal ,Neisseria meningitidis ,Meningococcal disease ,medicine.disease_cause ,Polymerase Chain Reaction ,Microbiology ,Disease Outbreaks ,Drug Resistance, Bacterial ,medicine ,Humans ,education ,Child ,DNA Primers ,education.field_of_study ,biology ,business.industry ,Incidence (epidemiology) ,Infant, Newborn ,Outbreak ,Infant ,biology.organism_classification ,medicine.disease ,Virology ,Anti-Bacterial Agents ,Penicillin ,Infectious Diseases ,Child, Preschool ,Neisseriaceae ,Female ,Seasons ,business ,Meningitis ,medicine.drug ,Research Article - Abstract
The annual incidence of meningococcal disease (meningitis and septicaemia) in Taiwan was 0·94/105 population in 1953. It then declined to below 0·001 from 1980 to 1987, and re-emerged in 2000 with a rate of 0·07/105 population. In 2001 there was a further increase in incidence (43 cases, 0·19/105). Of 43 isolates of Neisseria meningitidis available for this study, including 41 from patients treated in 2001, three (7·0%) were penicillin insensitive (MIC [ges ]0·12 μg/ml), though all were β-lactamase negative; 16 (37·2%) were resistant to trimethoprim–sulphamethoxazole sulphamethoxazole (MIC [ges ]4/76 μg/ml). Serogrouping and genotype analysis revealed nine domestic clones. None of the 43 patients had any relationship (travel or contact history) with the 2000 or 2001 Hajj pilgrimage. Epidemiological information and typing results suggested wide dissemination of a limited number of domestic clones of N. meningitidis, manifesting as serogroups W-135, B and Y. Two clones of serogroup W-135 involved in the outbreak were genetically distinct from the 2000 or 2001 Hajj-related W-135 clone.
- Published
- 2004
43. Tunable Photoluminescence of Poly(quinoline)s in Polymer Blend Films and Silica
- Author
-
S. W. Ho, W. Y. Huang, T. K. Kwei, and Y. Okamoto
- Published
- 2004
44. In vitro antimicrobial susceptibility ofVibrio vulnificus isolated in Taiwan
- Author
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S. W. Ho, J C Chang, Shan-Chwen Chang, Po-Ren Hsueh, and Wei-Chuan Hsieh
- Subjects
Microbiology (medical) ,medicine.medical_specialty ,biology ,business.industry ,Taiwan ,Antimicrobial susceptibility ,Microbial Sensitivity Tests ,General Medicine ,Vibrio vulnificus ,biology.organism_classification ,Vibrio ,In vitro ,Microbiology ,Infectious Diseases ,Medical microbiology ,Vibrio Infections ,medicine ,Humans ,business - Published
- 1995
45. Comparison of Various Icing Times in Decreasing Bone Metabolism and Blood Flow in the Knee
- Author
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Malcolm Cooper, Richard L. Illgen, Bruce Reider, Sherwin S. W. Ho, Richard W. Meyer, and Peter J. Torok
- Subjects
Adult ,Male ,medicine.medical_specialty ,Time Factors ,Knee Joint ,Physical Therapy, Sports Therapy and Rehabilitation ,Scintigraphy ,Bone scans ,Bone remodeling ,03 medical and health sciences ,0302 clinical medicine ,Image Interpretation, Computer-Assisted ,medicine ,Humans ,Orthopedics and Sports Medicine ,Radionuclide Imaging ,Aged ,Icing ,030222 orthopedics ,medicine.diagnostic_test ,business.industry ,Hemodynamics ,Temperature ,Soft tissue ,Arteries ,030229 sport sciences ,Blood flow ,Middle Aged ,Cooling time ,Surgery ,Technetium Compounds ,Cryotherapy ,Female ,business ,Nuclear medicine ,human activities - Abstract
In a previous study we used technetium-99m bone scans to show that cooling a knee for 20 minutes with a standard ice wrap will decrease soft tissue blood flow by a mean of 26%, and skeletal blood flow and me tabolism by 19%. The present study examined the ef fects of shorter and longer icing periods to determine minimum cooling time for a measurable and consistent decrease, and time to produce maximal decrease within a safe period of icing (
- Published
- 1995
46. Prevalence and predictors of renal artery stenosis in Chinese patients with coronary artery disease
- Author
-
Y, Wang, D S W, Ho, W H, Chen, Y Q, Wang, W F, Lam, Z J, Shen, C Z, Lu, and M, Chui
- Subjects
Male ,Analysis of Variance ,Angiography ,Comorbidity ,Coronary Artery Disease ,Middle Aged ,Coronary Angiography ,Prognosis ,Renal Artery Obstruction ,Severity of Illness Index ,Cohort Studies ,Survival Rate ,Age Distribution ,Logistic Models ,Asian People ,Predictive Value of Tests ,Risk Factors ,Prevalence ,Hong Kong ,Humans ,Female ,Sex Distribution ,Aged ,Probability - Abstract
Ischaemic nephropathy is currently a major public health issue in atherosclerotic populations. Although atherosclerotic cardiovascular disease in Asia has reached epidemic proportions over the last two decades, there is little published data on the prevalence of atherosclerotic renal artery stenosis (ARAS) in Oriental subjects. Because ARAS may be clinically silent until end-stage renal failure sets in, it is important to identify patients with significant but clinically unsuspected ARAS. ARAS and coronary artery disease (CAD) often coexist.The purpose of the present study was to evaluate the prevalence and predictors of ARAS among Chinese patients with CAD.A total of 230 consecutive Chinese patients with CAD confirmed by coronary angiography underwent an abdominal aortogram in the same sitting to screen for ARAS. Patient demographics and comorbidities were analysed for any association with ARAS.A total of 34 (14.8%) patients was found to have significant ARAS. Age and multivessel CAD were independent predictors of ARAS. Hypertension, renal insufficiency, extracranial cerebrovascular disease and female gender were also associated with a higher risk of ARAS but did not independently predict ARAS.Clinically silent yet angiographically significant ARAS is common among CAD patients. The prevalence and predictors of ARAS among Chinese patients with CAD are similar to those reported for Caucasian subjects. Underlying ARAS should be suspected in CAD patients with such comorbidities as hypertension, renal insufficiency, extracranial cerebrovascular disease, and more so in the elderly and those with multivessel disease.
- Published
- 2003
47. The myc oncogene: MarvelouslY Complex
- Author
-
Sara K, Oster, Cynthia S W, Ho, Erinn L, Soucie, and Linda Z, Penn
- Subjects
Proto-Oncogene Proteins c-myc ,Neovascularization, Pathologic ,Transcription, Genetic ,Neoplasms ,Cell Cycle ,Animals ,Humans ,Protein Isoforms ,Apoptosis ,Models, Biological ,Chromatin - Abstract
The activated product of the myc oncogene deregulates both cell growth and death check points and, in a permissive environment, rapidly accelerates the affected clone through the carcinogenic process. Advances in understanding the molecular mechanism of Myc action are highlighted in this review. With the revolutionary developments in molecular diagnostic technology, we have witnessed an unprecedented advance in detecting activated myc in its deregulated, oncogenic form in primary human cancers. These improvements provide new opportunities to appreciate the tumor subtypes harboring deregulated Myc expression, to identify the essential cooperating lesions, and to realize the therapeutic potential of targeting Myc. Knowledge of both the breadth and depth of the numerous biological activities controlled by Myc has also been an area of progress. Myc is a multifunctional protein that can regulate cell cycle, cell growth, differentiation, apoptosis, transformation, genomic instability, and angiogenesis. New insights into Myc's role in regulating these diverse activities are discussed. In addition, breakthroughs in understanding Myc as a regulator of gene transcription have revealed multiple mechanisms of Myc activation and repression of target genes. Moreover, the number of reported Myc regulated genes has expanded in the past few years, inspiring a need to focus on classifying and segregating bona fide targets. Finally, the identity of Myc-binding proteins has been difficult, yet has exploded in the past few years with a plethora of novel interactors. Their characterization and potential impact on Myc function are discussed. The rapidity and magnitude of recent progress in the Myc field strongly suggests that this marvelously complex molecule will soon be unmasked.
- Published
- 2002
48. Determination of aminoglycoside resistance mechanisms of Enterobacterlaceae Isolated from a hospital in Hong Kong with antibiogram and genotyping
- Author
-
M. H. Ng, R. S. Hare, G. H. Miller, K J Shaw, and B. S. W. Ho
- Subjects
Pharmacology ,Microbiology (medical) ,biology ,medicine.diagnostic_test ,business.industry ,Hybridization probe ,Drug resistance ,biology.organism_classification ,Enterobacteriaceae ,Microbiology ,Nucleic acid thermodynamics ,chemistry.chemical_compound ,Infectious Diseases ,Antibiogram ,chemistry ,Genotype ,Medicine ,Pharmacology (medical) ,business ,Genotyping ,DNA - Published
- 1993
49. Nosocomial Exophiala jeanselmei pseudoinfection after sonography-guided aspiration of thoracic lesions
- Author
-
P R, Hsueh, L J, Teng, J H, Hsu, Y S, Liaw, Y C, Chen, Y S, Pan, H J, Pan, P C, Yang, S W, Ho, and K T, Luh
- Subjects
Adult ,Male ,Cross Infection ,Biopsy, Needle ,Fatty Acids ,Middle Aged ,Random Amplified Polymorphic DNA Technique ,Mycoses ,Thoracic Diseases ,Exophiala ,Humans ,Female ,Aged ,Ultrasonography - Abstract
During the period from August 1994 to October 1998, a total of 19 isolates of Exophiala jeanselmei were recovered from 17 patients with various underlying thoracic diseases treated at National Taiwan University Hospital. The purpose of this study was to describe the clinical characteristics of these patients and to determine the microbiologic relatedness of the E. jeanselmei.Of the 19 isolates, 11 from nine patients were preserved and were identified based on their biotypes as determined by the API ID32C System, their cellular fatty acid profiles by gas-liquid chromatography, their antibiotypes to five antifungal agents by the E-test, and their random amplified polymorphic DNA (RAPD) patterns by arbitrarily primed PCR. Extensive environmental surveillance cultures and cultures from the skin of eight patients and hands of one physician were also performed.One of the 17 patients had E. jeanselmei isolated from cutaneous phaeohyphomycosis (3 isolates), and the other 16 patients had isolations from pleural effusion specimens (15 isolates) or lung mass (1 isolate) following sonography-guided aspiration. The latter 16 patients had no clinical or pathologic evidence of fungal infection. Isolates (clone 1) from aspirated specimens had identical biotypes, antibiotypes, and RAPD patterns, which were different from those of the three isolates (clone 2) from the patient with a cutaneous lesion. All specimens from environmental sources, patients' skin, and the hands of the physician were negative for E. jeanselmei.This series of patients demonstrates the difficulty in identifying the sources of a nosocomial pseudoinfection due to this slow-growing microorganism when isolated from pleural effusion specimens.
- Published
- 2001
50. High protease activity of Chryseobacterium indologenes isolates associated with invasive infection
- Author
-
H J, Pan, L J, Teng, Y C, Chen, P R, Hsueh, P C, Yang, S W, Ho, and K T, Luh
- Subjects
Virulence ,Endopeptidases ,Fatty Acids ,Humans ,Gram-Negative Bacterial Infections ,Flavobacterium - Abstract
In order to understand virulence factors of Chryseobacterium indologenes isolates associated with invasive infection, enzymatic activities and cellular fatty acid profiles of 42 isolates recovered at National Taiwan University Hospital from January 1994 to December 1996 were studied. Among them, 12 blood isolates were considered as invasive and 30 (recovered from urine, sputa, infected burn wounds, and catheter tips) were noninvasive. All isolates showed strong activities of alkaline phosphatase, acid phosphatase, naphthol-AS-BI-phosphohydrolase, and N-acetyl-beta-glucosaminidase, and had no activities for alpha-galactosidase, beta-galactosidase, beta-glucuronidase, alpha-mannosidase, and alpha-fucosidase. The activities of other enzymes were variable. Thirty-two isolates (76%) had varying degrees of protease activity. Two profiles (profiles I and II) of cellular fatty acids of the isolates were found and profile I predominated. There was no significant difference of distribution of cellular fatty acid profiles and activities of enzymes between invasive and noninvasive isolates, except protease activity which was significantly higher in invasive isolates than that in noninvasive isolates. Protease activity may play an important role in virulence on invasive infections caused by C. indologenes.
- Published
- 2001
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