28 results on '"Wei-Ting LAI"'
Search Results
2. Recognizing spatial and temporal clustering patterns of dengue outbreaks in Taiwan
- Author
-
Wei-Ting Lai, Chien-Hsiun Chen, Hsin Hung, Ray-Bing Chen, Sanjay Shete, and Chih-Chieh Wu
- Subjects
Dengue ,Hierarchical ,Spatial clustering ,Temporal clustering ,Zika ,Infectious and parasitic diseases ,RC109-216 - Abstract
Abstract Background Dengue fever is the most common arboviral infection in humans, with viral transmissions occurring in more than 100 countries in tropical regions. A global strategy for dengue prevention and control was established more than 10 years ago. However, the factors that drive the transmission of the dengue virus and subsequent viral infection continue unabated. The largest dengue outbreaks in Taiwan since World War II occurred in two recent successive years: 2014 and 2015. Methods We performed a systematic analysis to detect and recognize spatial and temporal clustering patterns of dengue incidence in geographical areas of Taiwan, using the map-based pattern recognition procedure and scan test. Our aim was to recognize geographical heterogeneity patterns of varying dengue incidence intensity and detect hierarchical incidence intensity clusters. Results Using the map-based pattern recognition procedure, we identified and delineated two separate hierarchical dengue incidence intensity clusters that comprise multiple mutually adjacent geographical units with high dengue incidence rates. We also found that that dengue incidence tends to peak simultaneously and homogeneously among the neighboring geographic units with high rates in the same cluster. Conclusion Beyond significance testing, this study is particularly desired by and useful for health authorities who require optimal characteristics of disease incidence patterns on maps and over time. Among the integrated components for effective prevention and control of dengue and dengue hemorrhagic fever are active surveillance and community-based integrated mosquito control, for which this study provides valuable inferences. Effective dengue prevention and control programs in Taiwan are critical, and have the added benefit of controlling the potential emergence of Zika.
- Published
- 2018
- Full Text
- View/download PDF
3. Connective tissue growth factor decreases mitochondrial metabolism through ubiquitin-mediated degradation of mitochondrial transcription factor A in oral squamous cell carcinoma
- Author
-
Wei-Ting Lai, Yue-Ju Li, Shi-Bei Wu, Cheng-Ning Yang, Tai-Sheng Wu, Yau-Huei Wei, and Yi-Ting Deng
- Subjects
CTGF ,Metabolism ,Mitochondrion ,mtTFA ,OSCC ,Medicine (General) ,R5-920 - Abstract
Deregulation of metabolic pathways is one of the hallmarks of cancer progression. Connective tissue growth factor (CTGF/CCN2) acts as a tumor suppressor in oral squamous cell carcinoma (OSCC). However, the role of CTGF in modulating cancer metabolism is still unclear. Methods: OSCC cells stably overexpressing CTGF (SAS/CTGF) and shRNA against CTGF (TW2.6/shCTGF) were established. Oxygen consumption rate (OCR) and extracellular acidification rate (ECAR) were examined by the Seahorse XF24 analyzer. The expression of CTGF and mitochondrial biogenesis related genes was measured by real-time polymerase chain reaction or Western blot analysis. Results: CTGF decreased OCR, ECAR, adenosine triphosphate (ATP) generation, mitochondrial DNA (mtDNA), and mitochondrial transcription factor A (mtTFA) protein expression in OSCC cells. Overexpression of mtTFA restored CTGF-decreased OCR, ECAR, mtDNA copy number, migration and invasion of SAS/CTGF cells. Immunoprecipitation assay showed a higher level of ubiquitinated mtTFA protein after CTGF treatment. MG132, an inhibitor of proteasomal degradation, reversed the effect of CTGF on mtTFA protein expression in SAS cells. Conclusion: CTGF can decrease glycolysis, mitochondrial oxidative phosphorylation, ATP generation, and mtDNA copy number by increasing mtTFA protein degradation through ubiquitin proteasome pathway and in turn reduces migration and invasion of OSCC cells. Therefore, CTGF may be developed as a potential additive therapeutic drug for oral cancer in the near future.
- Published
- 2018
- Full Text
- View/download PDF
4. Application of Head-up Tilt Table Testing in Children
- Author
-
Wei-Ting Lai, Ming-Ren Chen, Shan-Miao Lin, and Haw-Kwei Hwang
- Subjects
children ,neurocardiogenic syncope ,tilt table testing ,Medicine (General) ,R5-920 - Abstract
We investigated the application of head-up tilt table testing (HUT) and management of neurocardiogenic syncope (NCS) in children, as pediatric studies are limited. Methods: Seventy-nine patients (ages 6-18 years) underwent HUT for evaluation of syncope. Patient triggers and premonitory symptoms allowed the clinical diagnosis of NCS or non-NCS. Results were divided into four hemodynamic types (1, 2A, 2B, and 3) according to patient response to HUT. Results: NCS occurred in 65 patients and non-NCS in 14 patients. Isoproterenol infusion significantly increased the sensitivity of the test (from 28% to 45%) and was associated with a slight decrease in the specificity (from 93% to 86%). Subjects in the type 1 group accounted for the majority of responses to the test (69%). There were no complications associated with the test. At follow-up (16.6 ± 9.3 months), the overall recurrence rate was 30.8% but NCS was less severe in most patients. The recurrence rate was similar for patients with a positive or negative HUT and for both pharmacologically and non-pharmacologically treated patients. Conclusion: HUT can be safely performed with a high specificity in children, with the sensitivity of HUT improved by isoproterenol. Therefore, a positive response to treatment is reassuring to the physician and family. NCS is generally a self-limited condition despite a high recurrence rate.
- Published
- 2010
- Full Text
- View/download PDF
5. Post-traumatic Left Ventricular Aneurysm with Massive Hemopericardium in a Child Presenting 3 Years After a Fall
- Author
-
Wei-Ting Lai, Shan-Miao Lin, Shyr-Jao Wu, Haw-Kwei Hwang, Chun-Chih Peng, and Ming-Ren Chen
- Subjects
child ,hemopericardium ,left ventricular aneurysm ,trauma ,Pediatrics ,RJ1-570 - Abstract
A 7-year-old boy developed a left ventricular aneurysm with massive hemopericardium 3 years ago due to a fall from a fourth-floor window. He had mild neurological sequelae including cranial nerve III palsy and abnormal electroencephalography findings at that time. He had no chest pain until recently when he presented with chest tightness and abdominal pain for 2 days prior to admission. Chest X-ray showed marked cardiomegaly. Echocardiography revealed massive pericardial effusion and a large left ventricular aneurysm. The massive hemopericardium was surgically drained, and the aneurysm was resected under cardiopulmonary bypass. He was discharged uneventfully 1 week after operation. Because symptoms and signs can vary in patients with ventricular aneurysm, we strongly suggest a close clinical follow-up, preferably with chest X-ray or echocardiography, for patients experiencing a blunt chest trauma.
- Published
- 2013
- Full Text
- View/download PDF
6. Anti-IL-20 Monoclonal Antibody Suppresses Prostate Cancer Growth and Bone Osteolysis in Murine Models.
- Author
-
Yu-Hsiang Hsu, Cheng-Ying Wu, Chung-Hsi Hsing, Wei-Ting Lai, Li-Wha Wu, and Ming-Shi Chang
- Subjects
Medicine ,Science - Abstract
Interleukin (IL)-20 is a proinflammatory cytokine in the IL-10 family. IL-20 is associated with tumor promotion in the pathogenesis of oral, bladder, and breast cancer. However, little is known about the role of IL-20 in prostate cancer. We hypothesize that IL-20 promotes the growth of prostate cancer cells. Immunohistochemical staining showed that IL-20 and its receptors were expressed in human PC-3 and LNCaP prostate cancer cell lines and in prostate tumor tissue from 40 patients. In vitro, IL-20 upregulated N-cadherin, STAT3, vimentin, fibronectin, RANKL, cathepsin G, and cathepsin K, and increased the migration and colony formation of prostate cancer cells via activated p38, ERK1/2, AKT, and NF-κB signals in PC-3 cells. We investigated the effects of anti-IL-20 monoclonal antibody 7E on prostate tumor growth in vivo using SCID mouse subcutaneous and intratibial xenograft tumor models. In vivo, 7E reduced tumor growth, suppressed tumor-mediated osteolysis, and protected bone mineral density after intratibial injection of prostate cancer cells. We conclude that IL-20 is involved in the cell migration, colony formation, and tumor-induced osteolysis of prostate cancer. Therefore, IL-20 might be a novel target for treating prostate cancer.
- Published
- 2015
- Full Text
- View/download PDF
7. Strategies for Promoting Timely Palliative Care in Outpatient Clinics.
- Author
-
Pei-Yu LEE, Kuei-Min CHEN, Wei-Ting LAI, and Hsiu-Hung WANG
- Subjects
TUMOR treatment ,HOME care services ,PATIENT selection ,PATIENT autonomy ,NURSES ,PALLIATIVE treatment ,OCCUPATIONAL roles ,EARLY medical intervention ,CANCER patient medical care ,HEALTH policy ,HOSPITAL care ,DISEASE management ,PSYCHOLOGICAL adaptation ,FAMILIES ,CLINICS ,HEALTH promotion ,NEEDS assessment ,AUTOMATION ,SOCIAL support ,PALLIATIVE care nurses ,TERMINAL care ,INTEGRATED health care delivery ,MEDICAL referrals ,DISEASE progression - Abstract
With cancer now the leading cause of death, the importance of palliative care importance is increasingly evident. However, the focus of current policies is on inpatient and home-based care, which neglects the specialized needs of outpatients and results in many not receiving timely palliative care. Integrating palliative care into outpatient clinics using standardized referral criteria and automated systems will allow for timely patient selection and intervention, early symptom management, and psychological support as well as promote patient autonomy in treatment decision-making. Specialized oncology palliative care nurses play a crucial role in related assessment, care planning, and implementation activities. They help patients and families cope with disease progression and end-oflife care through education and support. Early outpatient palliative care benefits many patients and families, realizing a holistic and comprehensive care model. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
8. Unleashing the Influence of cAMP Receptor Protein: The Master Switch of Bacteriocin Export in Pectobacterium carotovorum subsp. carotovorum
- Author
-
Chuang, Chung-Pei Chang, Ruchi Briam James Sersenia Lagitnay, Tzu-Rong Li, Wei-Ting Lai, Reymund Calanga Derilo, and Duen-Yau
- Subjects
cAMP receptor protein ,low-molecular-weight bacteriocin ,flagellar-type III secretion ,Pectobacterium carotovorum subsp. carotovorum - Abstract
Pectobacterium carotovorum subsp. carotovorum (Pcc) is a Gram-negative phytopathogenic bacterium that produces carocin, a low-molecular-weight bacteriocin that can kill related strains in response to factors in the environment such as UV exposure or nutritional deficiency. The function of the catabolite activator protein (CAP), also known as the cyclic AMP receptor protein (CRP), as a regulator of carocin synthesis was examined. The crp gene was knocked out as part of the investigation, and the outcomes were assessed both in vivo and in vitro. Analysis of the DNA sequence upstream of the translation initiation site of carocin S3 revealed two putative binding sites for CRP that were confirmed using a biotinylated probe pull-down experiment. This study revealed that the deletion of crp inhibited genes involved in extracellular bacteriocin export via the flagellar type III secretion system and impacted the production of many low-molecular-weight bacteriocins. The biotinylated probe pull-down test demonstrated that when UV induction was missing, CRP preferentially attached to one of the two CAP sites while binding to both when UV induction was present. In conclusion, our research aimed to simulate the signal transduction system that controls the expression of the carocin gene in response to UV induction.
- Published
- 2023
- Full Text
- View/download PDF
9. [Living With Cancer: Clinical Application of Mindfulness on Cancer-Related Fatigue]
- Author
-
Wei-Ting, Lai, Min-Tao, Hsu, and Hsun-Kuei, Ko
- Subjects
Neoplasms ,Palliative Care ,Quality of Life ,Humans ,Mindfulness ,Fatigue - Abstract
Cancer-related fatigue is the most common and longest-lasting symptom of discomfort experienced by cancer patients. Its effects on patients include physical, psychological, emotional, and cognitive stress, which greatly reduce quality of life. The field of mind-body integrated medicine has improved gradually in recent years, with many evidence-based studies supporting the efficacy of mindfulness as a symptom management strategy for cancer-related fatigue. Based on a review of the literature, this paper introduces the definition of cancer-related fatigue and related assessments and treatments, describes the origin of mindfulness and related concepts, and introduces mindfulness-based empirical treatment strategies for cancer-related fatigue, including mindfulness-based stress reduction and mindfulness-based cognitive therapy, and their effects. The findings are intended to provide clinicians with a reference for the future care of patients with cancer-related fatigue.與癌共處—正念於癌因性疲憊之臨床應用.癌因性疲憊為癌症病人最常經歷且為時最久的不適症狀,影響病人產生諸多層面上的困擾,如身體、心理、情緒及認知等,大幅降低其生活品質。近年來身心整合醫學(mind-body integrative medicine)開始發展,實證研究陸續顯示,正念(mindfulness)可作為癌因性疲憊之症狀管理策略。因此本文透過文獻回顧,簡介癌因性疲憊的定義、評估及處置,並歸納整理正念的源起與相關概念,介紹正念運用於癌因性疲憊之相關實證處理策略與成效,如正念減壓(mindfulness-based stress reduction)及正念認知療法(mindfulness-based cognitive therapy)等,藉此提供臨床工作者未來照護癌因性疲憊病人之參考。.
- Published
- 2022
10. ATMIN Suppresses Metastasis by Altering the WNT-Signaling Pathway via PARP1 in MSI-High Colorectal Cancer
- Author
-
Yue-Ju Li, Tai-Sheng Wu, Cheng-Ning Yang, Been-Ren Lin, Wei-Ting Lai, and Mark Yen-Ping Kuo
- Subjects
DNA damage ,Poly (ADP-Ribose) Polymerase-1 ,Ataxia Telangiectasia ,03 medical and health sciences ,0302 clinical medicine ,PARP1 ,medicine ,Humans ,Wnt Signaling Pathway ,Transcription factor ,Gene knockdown ,business.industry ,Wnt signaling pathway ,Microsatellite instability ,TCF4 ,medicine.disease ,digestive system diseases ,Oncology ,030220 oncology & carcinogenesis ,Colonic Neoplasms ,Cancer cell ,Cancer research ,Microsatellite Instability ,030211 gastroenterology & hepatology ,Surgery ,Colorectal Neoplasms ,business ,Transcription Factors - Abstract
Constant DNA damage occurs in cells, and the cells are programmed to respond constitutively. This study explored the roles of ataxia-telangiectasia mutated interactor (ATMIN), one of the impaired pathways involving the DNA damage response (DDR) in mismatch repair-deficient [microsatellite instability (MSI)-high] colorectal carcinoma (CRC). Expression of ATMIN messenger RNA (mRNA) was detected in CRC specimens with microsatellite instability (MSI) characteristics. The effects of ectopic ATMIN expression and ATMIN knockdown on invasion abilities were evaluated in MSI-high cell lines, and liver metastasis ability was investigated in vivo. Protein-protein interactions were assessed by coimmunoprecipitation analyses in vitro. Decreased ATMIN expression was positively correlated with advanced stage of disease (P < 0.05), lymph node metastases (P < 0.05), and deeper invasion (P < 0.05) in MSI-high tumors. Transient or stable ATMIN knockdown significantly increased cell motility. Moreover, in the high-throughput microarray and gene set enrichment analysis, ATMIN was shown to act on the Wnt-signaling pathway via PARP1. This cascade influences β-catenin/transcription factor 4 (TCF4) binding affinity in MSI-high tumors, and PARP1 inhibition significantly decreased the number of metastases from ATMIN knockdown cancer cells. The results not only indicated the critical role of ATMIN, but also shed new light on PARP1 inhibitors, providing a basis for further clinical trials of MSI-high CRC.
- Published
- 2021
- Full Text
- View/download PDF
11. The Elephant in the Room: Integrative Care for Community Hospice Palliative Care in Taiwan: An Example of a Regional Teaching Hospital in Pingtung County.
- Author
-
Wei-Ting LAI, Min-Tao HSU, Chun-Hua HSU, Po-Yi CHEN, Li-Ping HSIAO, and Hsun-Kuei KO
- Subjects
HOSPICE care ,ACADEMIC medical centers ,TERMINAL care ,HOME care services ,COMMUNITIES ,COMMUNITY health services ,MEDICAL care costs ,COMMUNITY support ,MEDICAL care use ,HEALTH insurance ,INTEGRATED health care delivery ,PALLIATIVE treatment - Abstract
Taiwan has been an aging society since 2018. As a result, long-term care, end-of-life autonomy, and hospice care have received increasing attention. The government of Taiwan promotes home-based healthcare through the National Health Insurance System to enable the efficient utilization of medical resources and reduce overall medical costs. Taiwan's community hospice and palliative care network is expected to serve as the main care model supplementing partial hospitalization and institutional care. In this article, we review the history of and policies related to hospice and palliative care in Taiwan using a literature review and examining Pingtung County as a case study. The implementation of home-based palliative care is also outlined and policy revisions are proposed. The results are intended to provide a reference for healthcare authorities and medical institutions to promote community hospice and palliative care policies. The integrated care model can enhance the capacity of community-based palliative care, support patients receiving palliative care and their family members and caregivers, and ensure physical and psychological comfort for patients. This model contributes to the realization of older adults' preference for dying at home, which is especially pronounced in cultures where traditional Chinese ideas are deeply rooted. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
12. A review of Bayesian group selection approaches for linear regression models
- Author
-
Wei Ting Lai and Ray Bing Chen
- Subjects
Statistics and Probability ,Bayesian lasso ,Group selection ,Computer science ,business.industry ,Linear regression ,Bayesian probability ,Artificial intelligence ,business ,Machine learning ,computer.software_genre ,computer - Published
- 2020
- Full Text
- View/download PDF
13. The Antihypertensive Effects and Safety of LCZ696 in Patients with Hypertension: A Systemic Review and Meta-Analysis of Randomized Controlled Trials
- Author
-
Su-Kiat Chua, Lung-Ching Chen, Wei-Ting Lai, and Huei-Fong Hung
- Subjects
medicine.medical_specialty ,hypertension ,Subgroup analysis ,Review ,030204 cardiovascular system & hematology ,Placebo ,Sacubitril ,law.invention ,03 medical and health sciences ,0302 clinical medicine ,Randomized controlled trial ,law ,Internal medicine ,medicine ,LCZ696 ,030212 general & internal medicine ,business.industry ,General Medicine ,Publication bias ,ambulatory systolic blood pressure ,Blood pressure ,Valsartan ,Ambulatory ,Medicine ,business ,medicine.drug - Abstract
Background: The management of hypertension remains suboptimal throughout the world. Methods: We performed a random-effects model meta-analysis of randomized controlled trials to determine the effectiveness and safety of sacubitril/valsartan (LCZ696) for the treatment of high arterial pressure. Relevant published articles from PubMed, Cochrane base, and Medline were examined, and the last search date was December 2020. Only published randomized controlled trials and double-blind studies were selected for further analysis. The mean reductions in systolic blood pressure (msSBP) and diastolic blood pressure (msDBP) in the sitting position, as well as the mean reductions in ambulatory systolic blood pressure (maSBP) and ambulatory diastolic blood pressure (maDBP), were assumed as efficacy endpoints. Adverse events (AEs) were considered as safety outcomes. Results: Ten studies with a total of 5931patients were included for analysis. Compared with placebo, LCZ696 had a significant reduction in msSBP (weight mean difference (WMD) = −6.52 mmHg, 95% confidence interval (CI): −8.57 to −4.47; p < 0.001), msDBP (WMD = −3.32 mmHg, 95% CI: −4.57 to −2.07; p < 0.001), maSBP (WMD = −7.08 mmHg, 95% CI: −10.48 to −3.68; p < 0.001), maDBP (WMD = −3.57 mmHg, 95% CI: −5.71 to −1.44, p < 0.001). In subgroup analysis, only 200 mg and 400 mg LCZ696 showed a significant BP reduction. There was no difference in the AE rate between the LCZ696 and placebo groups (WMD = 1.02, 95% CI: 0.83 to 1.27, p = 0.54). Egger’s test revealed a potential publication bias for msSBP (p = 0.025), but no publication bias for other outcomes. Conclusion: LCZ696 may reduce blood pressure more efficaciously than traditional therapy in hypertensive patients without increasing adverse effects.
- Published
- 2021
- Full Text
- View/download PDF
14. Suppression of fructose-bisphosphate aldolase C expression as a predictor of advanced oral squamous cell carcinoma
- Author
-
Michael Hsiao, Mark Yen-Ping Kuo, Tse-Hung Huang, Cheng-Chi Chang, Yue-Ju Li, Jia-Ruei Fan, Tai-Sheng Wu, Been-Ren Lin, Shih-Jung Cheng, Wei-Ting Lai, and Cheng-Ning Yang
- Subjects
0301 basic medicine ,Pathology ,medicine.medical_specialty ,biology ,business.industry ,Aldolase C ,Fructose-bisphosphate aldolase ,Cell migration ,medicine.disease_cause ,medicine.disease ,Metastasis ,stomatognathic diseases ,03 medical and health sciences ,030104 developmental biology ,Otorhinolaryngology ,In vivo ,Cell culture ,Cancer cell ,medicine ,Cancer research ,biology.protein ,Carcinogenesis ,business - Abstract
Background Glycolysis machinery regulates cancer cell behavior. However, the roles of these glycolysis enzymes in oral squamous cell carcinoma (OSCC) progression remain unknown. Methods Fructose-bisphosphate aldolase C (ALDOC) expression in OSCC patients and cell lines was detected using quantitative real-time polymerase chain reaction (PCR). The functions of ALDOC in migration and invasion were determined using gain and loss of function approaches. An orthotopic OSCC animal model was performed to investigate the effects of ALDOC on metastasis and tumorigenesis in vivo. Results ALDOC expression is negatively significantly correlated with clinical outcome and cell migration in vitro and in vivo. ALDOC blocks adenosine triphosphate generation and lactate production, and mutation constructs of Arg42 and Lys146 functionally restore ALDOC-inhibited cell migration and invasion. Conclusion ALDOC functions as an OSCC prognosis marker clinically, and suppresses migration and invasion by its catalytic domain of Arg42 and Lys146. © 2015 Wiley Periodicals, Inc. Head Neck, 2015
- Published
- 2015
- Full Text
- View/download PDF
15. Single Germanium Quantum-dot Placement Along With Self-Aligned Electrodes for Effective Management of Single Charge Tunneling
- Author
-
I. H. Chen, Wei-Ting Lai, K. H. Chen, and Pei-Wen Li
- Subjects
Materials science ,business.industry ,Transistor ,chemistry.chemical_element ,Nanotechnology ,Germanium ,Electronic structure ,Capacitance ,Electronic, Optical and Magnetic Materials ,law.invention ,chemistry ,law ,Quantum dot ,Energy level ,Optoelectronics ,Nanorod ,Electrical and Electronic Engineering ,business ,Quantum tunnelling - Abstract
We demonstrated the controlled placement of a Ge quantum dot (QD) along with tunnel-junction engineering in a self-organized approach for the effective management of single charge tunneling. In this approach, a single-Ge-QD ( ~ 11 nm) self-aligning with nickel-polycide electrodes is realized by thermally oxidizing a SiGe nanorod that bridges a 15-nm-wide nanotrench in close proximity to electrodes via a spacer bilayer of Si3N4/SiO2. The fabricated Ge-QD single-hole transistor exhibits clear Coulomb oscillation and Coulomb diamond behaviors at T = 77 K-150 K, providing a way to analyze the electronic structure of the Ge QD.
- Published
- 2012
- Full Text
- View/download PDF
16. CMOS-Compatible Generation of Self-Organized 3-D Ge Quantum Dot Array for Photonic and Thermoelectric Applications
- Author
-
Wei-Ting Lai, Hung-Tai Chang, C. C. Wang, I. H. Chen, Jung-Chao Hsu, Pei-Wen Li, Ming-Tsung Hung, K. H. Chen, Wen-Yen Chen, Tzu-Min Hsu, and Shen-Wei Lee
- Subjects
Materials science ,business.industry ,Nanophotonics ,Nanotechnology ,Computer Science Applications ,Silicon-germanium ,chemistry.chemical_compound ,Nanolithography ,chemistry ,Quantum dot ,Thermoelectric effect ,Energy transformation ,Electrical and Electronic Engineering ,Photonics ,business ,Luminescence - Abstract
We demonstrate a CMOS-compatible scheme, selective oxidation of SiGe pillars, for creating well-organized 3-D Ge quantum dot (QD) array by guiding QDs migration along the oxidation path and thus placing them on targeted locations where the ultimate oxidation occurs. Stacked QDs exhibit tunable luminescence over the visible and possess low thermal conductivity, showing promise for nanophotonic and energy conversion devices.
- Published
- 2012
- Full Text
- View/download PDF
17. Controlled Heterogeneous Nucleation and Growth of Germanium Quantum Dots on Nanopatterned Silicon Dioxide and Silicon Nitride Substrates
- Author
-
K. H. Chen, C. Y. Chien, Wei-Ting Lai, Thomas F. George, Axel Scherer, and Pei-Wen Li
- Subjects
Ostwald ripening ,Materials science ,Silicon dioxide ,Nanowire ,Nucleation ,chemistry.chemical_element ,Nanotechnology ,Germanium ,General Chemistry ,Condensed Matter Physics ,chemistry.chemical_compound ,symbols.namesake ,Nanolithography ,Silicon nitride ,chemistry ,Quantum dot ,symbols ,General Materials Science - Abstract
Controlled heterogeneous nucleation and growth of Ge quantum dots (QDs) are demonstrated on SiO_2/Si_3N_4 substrates by means of a novel fabrication process of thermally oxidizing nanopatterned SiGe layers. The otherwise random self-assembly process for QDs is shown to be strongly influenced by the nanopatterning in determining both the location and size of the QDs. Ostwald ripening processes are observed under further annealing at the oxidation temperature. Both nanopattern oxidation and Ostwald ripening offer additional mechanisms for lithography for controlling the size and placement of the QDs.
- Published
- 2011
- Full Text
- View/download PDF
18. Analysis of Carrier Transport in Trigate Si Nanowire MOSFETs
- Author
-
Chia-Wei Wu, Pei-Wen Li, Wei-Ting Lai, and Cheng-Chih Lin
- Subjects
Materials science ,Condensed matter physics ,Silicon ,Scattering ,business.industry ,Exciton ,Nanowire ,chemistry.chemical_element ,Electronic, Optical and Magnetic Materials ,Optical pumping ,Photoexcitation ,chemistry ,Gate oxide ,MOSFET ,Optoelectronics ,Electrical and Electronic Engineering ,business - Abstract
Trigate Si nanowire (NW) MOSFETs have been fabricated and characterized at temperature between 77 and 300 K in the dark and under light pumping. The NW width W and height H, the gate length Lg, and the gate oxide thickness tox, respectively, were 7-25, 16, 34-52, and 7 nm. The interesting aspects of Si NW MOSFETs with W/Lg = 25 nm /52 nm, 24 nm/34 nm, 7 nm/47 nm, and 10 nm/37 nm measured at low drain voltage are that the drain current exhibited not only inverse temperature dependence in strong accumulation but also clear current plateaus/oscillations near the threshold regime at temperature up to 300 K. Notably, such current plateaus diminished or were invisible in the device of W/Lg = 24 nm/42 nm. The observed current behaviors are inferred from the interplay of quantum interference and intersubband scattering effects. Additional current plateaus due to photogenerated excitons were also observed in the studied devices, evidencing photoexcitation effects on quantum transports through a Si NW.
- Published
- 2011
- Full Text
- View/download PDF
19. Post-traumatic Left Ventricular Aneurysm with Massive Hemopericardium in a Child Presenting 3 Years After a Fall
- Author
-
Shan-Miao Lin, Wei-Ting Lai, Haw-Kwei Hwang, Shyr-Jao Wu, Chun-Chih Peng, and Ming-Ren Chen
- Subjects
Male ,medicine.medical_specialty ,Abdominal pain ,Time Factors ,Heart Ventricles ,Chest pain ,Hemopericardium ,Pericardial effusion ,Pericardial Effusion ,Aneurysm ,Internal medicine ,medicine ,Humans ,hemopericardium ,Pediatrics, Perinatology, and Child Health ,cardiovascular diseases ,Heart Aneurysm ,child ,business.industry ,left ventricular aneurysm ,lcsh:RJ1-570 ,lcsh:Pediatrics ,medicine.disease ,Ventricular aneurysm ,Surgery ,Left Ventricular Aneurysm ,trauma ,Echocardiography ,Pediatrics, Perinatology and Child Health ,Cardiology ,cardiovascular system ,Accidental Falls ,medicine.symptom ,business - Abstract
A 7-year-old boy developed a left ventricular aneurysm with massive hemopericardium 3 years ago due to a fall from a fourth-floor window. He had mild neurological sequelae including cranial nerve III palsy and abnormal electroencephalography findings at that time. He had no chest pain until recently when he presented with chest tightness and abdominal pain for 2 days prior to admission. Chest X-ray showed marked cardiomegaly. Echocardiography revealed massive pericardial effusion and a large left ventricular aneurysm. The massive hemopericardium was surgically drained, and the aneurysm was resected under cardiopulmonary bypass. He was discharged uneventfully 1 week after operation. Because symptoms and signs can vary in patients with ventricular aneurysm, we strongly suggest a close clinical follow-up, preferably with chest X-ray or echocardiography, for patients experiencing a blunt chest trauma.
- Published
- 2013
20. Characterization of in Vitro Modified Human Very Low-Density Lipoprotein Particles and Phospholipids by Capillary Electrophoresis
- Author
-
Wei-Ting Lai, Yi-Jyun Lin, You-Sian Lin, Mine-Yine Liu, Mei-Yu Su, Yen-Yi Chen, Chin-Pong Chong, Yi-Han Liao, Yi-Ning Liu, Ting-Yu Shu, and Huai-Guang Xie
- Subjects
Glycation End Products, Advanced ,Very low-density lipoprotein ,Glycosylation ,Phospholipid ,In Vitro Techniques ,Lipoproteins, VLDL ,digestive system ,Catalysis ,Micellar electrokinetic chromatography ,Article ,Inorganic Chemistry ,Absorbance ,lcsh:Chemistry ,chemistry.chemical_compound ,Capillary electrophoresis ,Glycation ,polycyclic compounds ,Humans ,micellar electrokinetic chromatography ,Physical and Theoretical Chemistry ,Molecular Biology ,lcsh:QH301-705.5 ,Spectroscopy ,phospholipids ,Chromatography ,Chemistry ,Organic Chemistry ,solid phase extraction ,Electrophoresis, Capillary ,nutritional and metabolic diseases ,General Medicine ,in vitro oxidation ,Computer Science Applications ,Electrophoresis ,Glucose ,lcsh:Biology (General) ,lcsh:QD1-999 ,capillary zone electrophoresis ,in vitro glycation ,lipids (amino acids, peptides, and proteins) ,Oxidation-Reduction ,Lipoprotein ,very low-density lipoprotein - Abstract
A simple capillary zone electrophoresis (CZE) method was used to characterize human very low-density lipoprotein (VLDL) particles for four healthy donors. One major peak was observed for native, in vitro oxidized and glycated VLDL particles. The effective mobilities and peak areas of the capillary electrophoresis (CE) profiles showed good reproducibility and precision. The mobility of the oxidized VLDL peak was higher than that of the native VLDL. The mobility of the glycated VLDL peak was similar to that of the native VLDL. Phospholipids isolated from VLDL particles were analyzed by our recently developed micellar electrokinetic chromatography (MEKC) with a high-salt stacking method. At absorbance 200 nm, the native VLDL phospholipids showed a major peak and a minor peak for each donor. For oxidized VLDL phospholipids, the area of the major peak reduced for three donors, possibly due to phospholipid decomposition. For glycated VLDL phospholipids, the peak mobilities were more positive than native VLDL phospholipids for two donors, possibly due to phospholipid-linked advanced glycation end products (AGEs). Very interestingly, at absorbance 234 nm, the major peak of oxidized VLDL phospholipids was resolved as two peaks for each donor, possibly due to conjugated dienes formed upon oxidation.
- Published
- 2012
- Full Text
- View/download PDF
21. Designer Ge quantum dots on Si: A heterostructure configuration with enhanced optoelectronic performance
- Author
-
Pei-Wen Li, Wei-Ting Lai, C. C. Wang, Thomas F. George, and Ming Hao Kuo
- Subjects
Photocurrent ,Materials science ,Physics and Astronomy (miscellaneous) ,business.industry ,Photoconductivity ,Heterojunction ,Photodiode ,law.invention ,Amorphous solid ,law ,Quantum dot ,Optoelectronics ,business ,Current density ,Dark current - Abstract
An otherwise random, self-assembly of Ge quantum dots (QDs) on Si has been controlled by nano-patterning and oxidation to produce QDs with desired sizes, locations, and depths of penetration into the Si substrate. A heterostructure consisting of a thin amorphous interfacial oxide between the Ge QD and the Si substrate is shown to improve crystalline quality by de-coupling the lattice-matching constraint. A low dark current density of 1.1 μA/cm2 and a high photocurrent enhancement up to 35 000 and 1500, respectively, for 1.5 mW incident illumination at 850 nm and 1160 nm was measured on our Ge QD-based metal-oxide-semiconductor photodiodes.
- Published
- 2012
- Full Text
- View/download PDF
22. Design of multifold Ge/Si/Ge composite quantum-dot heterostructures for visible to near-infrared photodetection.
- Author
-
Ming-Hao Kuo, Wei-Ting Lai, Sheng-Wei Lee, Yen-Chun Chen, Chia-Wei Chang, Wen-Hao Chang, Tzu-Min Hsu, and Pei-Wen Li
- Published
- 2015
- Full Text
- View/download PDF
23. Room-temperature observation of large Coulomb-blockade oscillations from germanium Quantum-dot single-hole transistors with self-aligned electrodes.
- Author
-
Gwong-Liang Chen, Wei-Ting Lai, Kuo, D., and Pei-Wen Li
- Published
- 2007
- Full Text
- View/download PDF
24. EXTERNAL COST OF HIGH VOLTAGE OVERHEAD TRANSMISSION LINES: A CASE OF TAIPOWER COMPANY'S NANTOU-CHANGLIN LINE.
- Author
-
Wei-Ting Lai, Chern, Wen S., and Liu, Kang Ernest
- Abstract
Building high voltage overhead transmission lines (HVOTL)may incur huge external social cost. This study attempts to estimate such external cost using the Taipower Company's Nantou-Changlin HVOTL as a case study. This HVOTL likely affects the values of farmland. Data were collected from a field survey de- signed from the contingent valuation method (CVM). An econometric model using farmland price as the dependent variable was specified and estimated by two-stage least squares (2SLS) and Heckman two-step model (Heckit). The econometric results show that building this HVOTL would reduce the value of farmland within 600 meters from this line with 23.6 km on both sides. The closer to HVOTL, the lower is the farmland price. The total lost farmland value amounts to 17.1 billion NT dollars. This amount is more than six times the construction cost of 2.7 billion. These research results should be very useful to the Taipower Company and government agencies in assessing the external social cost of the construction of HVOTLs in Taiwan. [ABSTRACT FROM AUTHOR]
- Published
- 2014
25. Characterization of in Vitro Modified Human Very Low-Density Lipoprotein Particles and Phospholipids by Capillary Electrophoresis.
- Author
-
Yi-Ning Liu, Ting-Yu Shu, Huai-Guang Xie, Wei-Ting Lai, Yi-Han Liao, Mei-Yu Su, You-Sian Lin, Yen-Yi Chen, Yi-Jyun Lin, Chin-Pong Chong, and Mine-Yine Liu
- Subjects
VERY low-density lipoproteins ,PHOSPHOLIPIDS ,CAPILLARY electrophoresis ,PARTICLES ,SOLID phase extraction ,MICELLAR electrokinetic chromatography ,OXIDATION ,ADVANCED glycation end-products - Abstract
A simple capillary zone electrophoresis (CZE) method was used to characterize human very low-density lipoprotein (VLDL) particles for four healthy donors. One major peak was observed for native, in vitro oxidized and glycated VLDL particles. The effective mobilities and peak areas of the capillary electrophoresis (CE) profiles showed good reproducibility and precision. The mobility of the oxidized VLDL peak was higher than that of the native VLDL. The mobility of the glycated VLDL peak was similar to that of the native VLDL. Phospholipids isolated from VLDL particles were analyzed by our recently developed micellar electrokinetic chromatography (MEKC) with a high-salt stacking method. At absorbance 200 nm, the native VLDL phospholipids showed a major peak and a minor peak for each donor. For oxidized VLDL phospholipids, the area of the major peak reduced for three donors, possibly due to phospholipid decomposition. For glycated VLDL phospholipids, the peak mobilities were more positive than native VLDL phospholipids for two donors, possibly due to phospholipid-linked advanced glycation end products (AGEs). Very interestingly, at absorbance 234 nm, the major peak of oxidized VLDL phospholipids was resolved as two peaks for each donor, possibly due to conjugated dienes formed upon oxidation. [ABSTRACT FROM AUTHOR]
- Published
- 2012
- Full Text
- View/download PDF
26. Controlled Heterogeneous Nucleation and Growth of Germanium Quantum Dots on Nanopatterned Silicon Dioxide and Silicon Nitride Substrates.
- Author
-
Kuan-Hung Chen, Chung-Yen Chien, Wei-Ting Lai, Tom George, Axel Scherer, and Pei-Wen Li
- Published
- 2011
- Full Text
- View/download PDF
27. A new bandpass shielding enclosure of hexagon array for modern portable digital devices.
- Author
-
Cheng-Nan Chiu and Wei-Ting Lai
- Subjects
- *
ELECTRONIC equipment enclosures , *DIGITAL electronics , *WIRELESS communications , *ELECTROMAGNETIC shielding , *RADIATION , *ANTENNAS (Electronics) , *SIMULATION methods & models - Abstract
A new bandpass shielding enclosure (BPSE) made by etching the apertures of a periodic hexagon array on its top and bottom surfaces is proposed for modern portable digital devices having wireless communication functions. The BPSE is required to provide high transmittance at the specified communication band and high shielding effectiveness outside this band, and to have little influence on the radiation characteristics of an internal antenna located inside the enclosure. All three required features are difficult to achieve simultaneously. A prototype of the BPSE was built and studied. Both the simulated and measured results obtained show the promising performance of the BPSE and its potential in practical applications. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 15–18, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22978 [ABSTRACT FROM AUTHOR]
- Published
- 2008
- Full Text
- View/download PDF
28. Strong quantum confinement and coulomb blockade effects in Ge quantum dots/SiO2 system.
- Author
-
Wei-Ming Liao, Wei-Ting Lai, Pei-Wen Li, Ming-Ting Kuo, Chen, P.S., and Tsai, M.-J.
- Published
- 2005
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.