997 results on '"An, Jong R."'
Search Results
2. Novel building energy performance-based climate zoning enhanced with spatial constraint
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Remizov, Alexey, Memon, Shazim Ali, and Kim, Jong R.
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- 2024
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Catalog
3. Blanket antimicrobial resistance gene database with structural information, BOARDS, provides insights on historical landscape of resistance prevalence and effects of mutations in enzyme structure
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Seyoung Ko, Jaehyung Kim, Jaewon Lim, Sang-Mok Lee, Joon Young Park, Jihoon Woo, Zoe K. Scott-Nevros, Jong R. Kim, Hyunjin Yoon, and Donghyuk Kim
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antimicrobial resistance ,database ,analysis pipeline ,WGS analysis ,predicted protein structures ,Microbiology ,QR1-502 - Abstract
ABSTRACTAntimicrobial resistance (AMR) in pathogenic bacteria poses a significant threat to public health, yet there is still a need for development in the tools to deeply understand AMR genes based on genetic or structural information. In this study, we present an interactive web database named Blanket Overarching Antimicrobial-Resistance gene Database with Structural information (BOARDS, sbml.unist.ac.kr), a database that comprehensively includes 3,943 reported AMR gene information for 1,997 extended spectrum beta-lactamase (ESBL) and 1,946 other genes as well as a total of 27,395 predicted protein structures. These structures, which include both wild-type AMR genes and their mutants, were derived from 80,094 publicly available whole-genome sequences. In addition, we developed the rapid analysis and detection tool of antimicrobial-resistance (RADAR), a one-stop analysis pipeline to detect AMR genes across whole-genome sequencing (WGSs). By integrating BOARDS and RADAR, the AMR prevalence landscape for eight multi-drug resistant pathogens was reconstructed, leading to unexpected findings such as the pre-existence of the MCR genes before their official reports. Enzymatic structure prediction-based analysis revealed that the occurrence of mutations found in some ESBL genes was found to be closely related to the binding affinities with their antibiotic substrates. Overall, BOARDS can play a significant role in performing in-depth analysis on AMR.IMPORTANCEWhile the increasing antibiotic resistance (AMR) in pathogen has been a burden on public health, effective tools for deep understanding of AMR based on genetic or structural information remain limited. In this study, a blanket overarching antimicrobial-resistance gene database with structure information (BOARDS)—a web-based database that comprehensively collected AMR gene data with predictive protein structural information was constructed. Additionally, we report the development of a RADAR pipeline that can analyze whole-genome sequences as well. BOARDS, which includes sequence and structural information, has shown the historical landscape and prevalence of the AMR genes and can provide insight into single-nucleotide polymorphism effects on antibiotic degrading enzymes within protein structures. more...
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- 2024
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4. The complementary value of intraoperative fluorescence imaging and Raman spectroscopy for cancer surgery: combining the incompatibles
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Lauwerends, L. J., Abbasi, H., Bakker Schut, T. C., Van Driel, P. B. A. A., Hardillo, J. A. U., Santos, I. P., Barroso, E. M., Koljenović, S., Vahrmeijer, A. L., Baatenburg de Jong, R. J., Puppels, G. J., and Keereweer, S. more...
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- 2022
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5. Assessment of the association between dust storms and COVID-19 infection rate in southwest Iran
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Broomandi, Parya, Crape, Byron, Jahanbakhshi, Ali, Janatian, Nasime, Nikfal, Amirhossein, Tamjidi, Mahsa, Kim, Jong R., Middleton, Nick, and Karaca, Ferhat
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- 2022
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6. A study protocol for individualized prognostic counselling in the palliative phase.
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van den Besselaar, Boyd Noël, Sewnaik, A., Dorr, M. C., Hoesseini, A., Hardillo, J. A., Baatenburg de Jong, R. J., and Offerman, M.P.J.
- Abstract
Background: Head and neck squamous cell cancer (HNSCC) has a poor prognosis, with approximately 25–30% of patients transitioning into the palliative phase at some point. The length of this phase is relatively short, with a median duration of five months. Patients in this stage often have increased prognostic information needs. Unfortunately, predicting individual life expectancy in this phase is particularly challenging, as physicians and patients tend to overestimate survival. To address this issue, we developed the prognostic model OncologIQ Palliative based on user preferences. In this study, we now aim to assess the clinical impact of utilizing this model during counselling. Methods: This study will employ both quantitative and qualitative approaches. The primary outcome is decisional conflict and satisfaction with the decision-making process after counselling without (cohort 1) and with (cohort 2) OncologIQ Palliative. Therefore, a prospective sequential cohort study will be conducted. Secondary outcomes include the amount of palliative treatment, overall survival rates, and quality of life. These measurements will be collected after the intervention. Additionally, patients' perspectives on the decision-making process and proactive care planning, including end-of-life discussions, will be explored through interviews. Discussion: By offering more personalized prognostic information for HNSCC patients in the palliative phase, we anticipate a shift towards more patient-centred counselling. This approach can facilitate enhanced end-of-life discussions and better proactive care planning. Patients may experience reduced decisional conflict, feel better prepared for what's coming, and find assistance in their decision-making process. This could potentially lead to fewer palliative treatments. Overall, these aspects can contribute to a better quality of life and quality of care for HNSCC patients in the last phase of their lives. Trial Registration: This study was registered November 18, 2024, on ClinicalTrials.gov: NCT06699316. [ABSTRACT FROM AUTHOR] more...
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- 2025
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7. Key Drivers for BIM-Enabled Materials Management: Insights for a Sustainable Environment
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Tokzhan Junussova, Abid Nadeem, Jong R. Kim, and Salman Azhar
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Building Information Modelling ,construction materials management ,sustainability ,Building construction ,TH1-9745 - Abstract
The value of Building Information Modelling (BIM) is widely discussed within all construction stages including the data-driven culture across building processes and sustainable impact in the long term. Yet, there is a need to explore the opportunities of BIM in improving construction materials management (CMM) as a core function of supply chain management. Due to the dearth of studies on BIM potential in improving CMM within the sustainability context, the authors examine the effectiveness and efficiency of BIM-enabled materials management, via three data streams: a literature review, an online survey, and interviews with subject matter experts in the field. This study aims to explore the drivers of BIM-enabled sustainable construction materials management. This is the preliminary study designed to test the initial hypotheses based on an online questionnaire application to derive tacit knowledge from industry and academic experts, followed by short interviews with respondents. Grounded in the comprehensive literature review, 24 indicators were defined for survey purposes. Preliminarily, 206 experts from 10 countries responded to the survey. The results show significant differences in the ranking of the indicators among the five factors. In developing countries, among two groups, industry sample awareness scales demonstrated lower understanding than among academic experts. Another finding relates to the significant agreement in scaling the importance of opportunities among industrial and academic sector experts. The research adds knowledge to deepen the understanding of opportunities of BIM-enabled materials management as a part of building project sustainable performance for industry policy and decision-makers. It also brings attention to the lack of sustainability awareness amongst industry experts in developing countries. Although materials constitute a solid part of any construction project cost, there is still a collaboration gap among designers, materials management, and, more broadly, supply chain management experts. more...
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- 2023
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8. Dynamic prediction of mortality in COVID-19 patients in the intensive care unit: A retrospective multi-center cohort study
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Smit, J.M., Krijthe, J.H., Endeman, H., Tintu, A.N., de Rijke, Y.B., Gommers, D.A.M.P.J., Cremer, O.L., Bosman, R.J., Rigter, S., Wils, E.-J., Frenzel, T., Dongelmans, D.A., De Jong, R., Peters, M.A.A., Kamps, M.J.A., Ramnarain, D., Nowitzky, R., Nooteboom, F.G.C.A., De Ruijter, W., Urlings-Strop, L.C., Smit, E.G.M., Mehagnoul-Schipper, D.J., Dormans, T., De Jager, C.P.C., Hendriks, S.H.A., Achterberg, S., Oostdijk, E., Reidinga, A.C., Festen-Spanjer, B., Brunnekreef, G.B., Cornet, A.D., Van den Tempel, W., Boelens, A.D., Koetsier, P., Lens, J.A., Faber, H.J., karakus, A., Entjes, R., De Jong, P., Rettig, T.C.D., Arbous, M.S., Lalisang, R.C.A., Tonutti, M., De Bruin, D.P., Elbers, P.W.G., Van Bommel, J., and Reinders, M.J.T. more...
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- 2022
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9. Quality improvements of healthcare trajectories by learning from aggregated patient-reported outcomes: a mixed-methods systematic literature review
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Dorr, Maarten C., van Hof, K. S., Jelsma, J. G. M., Dronkers, E. A. C., de Jong, R. J. Baatenburg, Offerman, M. P. J., and de Bruijne, M. C.
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- 2022
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10. Age Moderates the Effect of Obesity on Mortality Risk in Critically Ill Patients With COVID-19: A Nationwide Observational Cohort Study*
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den Uil, Corstiaan A., Termorshuizen, Fabian, Rietdijk, Wim J. R., Sablerolles, Roos S. G., van der Kuy, Hugo P. M., Haas, Lenneke E. M., van der Voort, Peter H. J., de Lange, Dylan W., Pickkers, Peter, de Keizer, Nicolette F., Arbous, M. S., Barnas, M. G. W., Boer, D. P., Bosman, R. J., Brunnekreef, G. B., de Bruin, M. Th., de Graaff, M. J., de Jong, R. M., de Meijer, A. R., de Ruijter, W., de Waal, R., Dijkhuizen, A., Dongelmans, D. A., Dormans, T. P. J., Draisma, A., Drogt, I., Eikemans, B. J. W., Elbers, P. W. G., Epker, J. L., Erkamp, M. L., Festen-Spanjer, B., Frenzel, T., Georgieva, L., Gritters, N. C., Hené, I. Z., Hoeksema, M., Holtkamp, J. W. M., Hoogendoorn, M. E., Jacobs, C. J. G. M., Janssen, I. T. A., Kieft, H., Koetsier, M. P., Koning, T. J. J., Kreeftenberg, H., Kusadasi, N., Lens, J. A., Lutisan, J. G., Mehagnoul-Schipper, D. J., Moolenaar, D., Nooteboom, F., Postma, N., Pruijsten, R. V., Ramnarain, D., Reidinga, A. C., Rengers, E., Rijkeboer, A. A., Rijpstra, T., Rozendaal, F. W., Schnabel, R. M., Silderhuis, V. M., Spijkstra, J. J., Spronk, P. E., te Velde, L. F., Urlings-Strop, L. C., van den Berg, A. E., van den Berg, R., van der Horst, I. C. C., van Driel, E. M., van Gulik, L., van Iersel, F. M., van Lieshout, M., van Oers, J. A. H., van Slobbe-Bijlsma, E. R., van Tellingen, M., Vandeputte, J., Verbiest, D. P., Versluis, D. J., Verweij, E., Vrolijk-de Mos, M., and Wesselink, R. M. J. more...
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- 2023
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11. Empirical derivation of the metallicity evolution with time and radius using TNG50 Milky Way and Andromeda analogues.
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Ratcliffe, B., Khoperskov, S., Minchev, I., Lu, L., de Jong, R. S., and Steinmetz, M.
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DISK galaxies ,MILKY Way ,GALACTIC evolution ,STAR formation ,GALACTIC center - Abstract
Context. Recent works use a linear birth metallicity gradient to estimate the evolution of the [Fe/H] profile in the Galactic disk over time, and infer stellar birth radii (R
birthipt>) from [Fe/H] and age measurements. These estimates rely on the evolution of [Fe/H] at the Galactic center ([Fe/H](0, τ)) and the birth metallicity gradient (∇[Fe/H](τ)) over time – quantities that are unknown and inferred under key assumptions. Aims. In this work, we use the sample of Milky Way and Andromeda analogues from the TNG50 simulation to investigate the ability to recover [Fe/H](R, τ) in a variety of galaxies. Methods. Using stellar disk particles, we tested the assumptions required in estimating R birth , [Fe/H](0, τ), and ∇[Fe/H](τ) using recently proposed methods to understand when they are valid. Results. We show that ∇[Fe/H](τ) can be recovered in most galaxies to within 26% from the range in [Fe/H] across age, with better accuracy for more massive and stronger barred galaxies. We also find that the true central metallicity is unrepresentative of the genuine disk [Fe/H] profile; thus we propose to use a projected central metallicity instead. About half of the galaxies in our sample do not have a continuously enriching projected central metallicity, with a dilution in [Fe/H] correlating with mergers. Most importantly, galaxy-specific [Fe/H](R, τ) can be constrained and confirmed by requiring the Rbirth distributions of mono-age, solar neighborhood populations to follow inside-out formation. Conclusions. We conclude that examining trends with Rbirth is valid for the Milky Way disk and similarly structured galaxies, where we expect Rbirth can be recovered to within 20% assuming today's measurement uncertainties in TNG50. [ABSTRACT FROM AUTHOR] more...- Published
- 2024
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12. Mechanical properties of asphalt concrete modified with carbon nanotubes (CNTs)
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Mohamed Samir Eisa, Ahmed Mohamady, Mohamed E. Basiouny, Ayman Abdulhamid, and Jong R. Kim
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Carbon nanotubes (CNTs) ,Modified asphalt cement ,Asphalt mixture ,Rutting ,Fatigue ,Low temperature cracking ,Materials of engineering and construction. Mechanics of materials ,TA401-492 - Abstract
Three different percentages of carbon nanotubes (CNTs) (0.1%, 0.5%, and 1% by mass of asphalt cement) were used to modify conventional asphalt cement (60/70) in this study. Mechanical properties of modified asphalt cement and mixture were evaluated. Penetration grade, kinematic viscosity, softening point and dynamic shear rheometer test were measured to evaluate physical properties of modified asphalt cement. The results exhibited that modifying asphalt cement with CNTs decreased its penetration and increased its kinematic viscosity and softening point. Rutting parameter increased with CNTs at the given temperature for both unaged and RTFOT-aged samples. Marshall stability tests, low temperature cracking tests, indirect tensile tests and wheel tracking tests were conducted to assess the mechanical performance of modified hot asphalt mixture. The Marshall stability increased with CNTs but no significant difference at 0.5 and 1.0 wt%, while Marshall flow decreased with CNTs. The results of wheel tracking test showed that rut depth decreased by 45% upon adding 0.5% CNTs by weight of asphalt cement; also, this percentage of CNTs endowed improvement in low temperature cracking and indirect tensile strength of the asphalt concrete. This study underlines that adding CNTs into asphalt cement enhances the performance of asphalt concrete pavement in both hot and cold weather, which in turn prolongs the pavement’s service life and saves maintenance expenses. more...
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- 2022
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13. Evaluation of Ultra-low-dose Paediatric Cone-beam Computed Tomography for Image-guided Radiotherapy
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Bryce-Atkinson, A., de Jong, R., Bel, A., Aznar, M.C., Whitfield, G., and van Herk, M.
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- 2020
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14. Distribution of potentially toxic soil elements along a transect across Kazakhstan
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Guney, Mert, Yagofarova, Almira, Yapiyev, Vadim, Schönbach, Christian, Kim, Jong R., and Inglezakis, Vassilis J.
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- 2020
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15. Maximum torsional reinforcement ratio of reinforced concrete beams
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Ju, Hyunjin, Lee, Deuckhang, Kim, Jong R., and Kim, Kang Su
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- 2020
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16. Cost-utility of an eHealth application ‘Oncokompas’ that supports cancer survivors in self-management: results of a randomised controlled trial
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van der Hout, A., Jansen, F., van Uden-Kraan, C. F., Coupé, V. M., Holtmaat, K., Nieuwenhuijzen, G. A., Hardillo, J. A., de Jong, R. J. Baatenburg, Tiren-Verbeet, N. L., Sommeijer, D. W., de Heer, K., Schaar, C. G., Sedee, R. J. E., Bosscha, K., van den Brekel, M. W. M., Petersen, J. F., Westerman, M., Honings, J., Takes, R. P., Houtenbos, I., van den Broek, W. T., de Bree, R., Jansen, P., Eerenstein, S. E. J., Leemans, C. R., Zijlstra, J. M., Cuijpers, P., van de Poll-Franse, L. V., and Verdonck-de Leeuw, I. M. more...
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- 2021
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17. Climate Zoning for Buildings: From Basic to Advanced Methods—A Review of the Scientific Literature
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Alexey Remizov, Shazim Ali Memon, and Jong R. Kim
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building energy-efficiency ,building energy simulation ,climate zoning ,climatic variables ,cluster analysis ,degree-days ,Building construction ,TH1-9745 - Abstract
Understanding the link between the energy-efficiency of buildings and climatic conditions can improve the design of energy-efficient housing. Due to global climate change and growing requirements for building energy-efficiency, the number of publications on climate zoning for buildings has grown over the last 20 years. This review attempted to give the reader an up-to-date assessment of the scientific literature in the field of climate mapping for buildings on a global and national scale, filling in the gaps of previous works and focusing on details that were not presented before. There were 105 scientific sources examined. The most dominant climate zoning variables were thoroughly analyzed. A clear categorization of climate zoning methods with specific criteria was shown. The most used methods were evaluated, emphasizing their similarities and differences, as well as their essential components and advantages. The main literature review was supported with bibliometric and bibliographic analysis. The existence of many climate zoning methods can be an indicator of the lack of agreement on the most effective strategy. A tendency has been established for the popularization among scientists of methods based on machine learning and building energy simulations, which are relatively easy to use and have proven to be the most reliable climate zoning methods. A transformation is emerging by shifting from a climate-based to a building performance-based climate zoning approach. more...
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- 2023
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18. A multi-criteria decision-making framework for building sustainability assessment in Kazakhstan
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Akhanova, Gulzhanat, Nadeem, Abid, Kim, Jong R., and Azhar, Salman
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- 2020
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19. Human respiratory syncytial virus infection in the pre-clinical calf model
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Cortjens, B., de Jong, R., Bonsing, J.G., van Woensel, J.B.M., Bem, R.A., and Antonis, A.F.G.
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- 2019
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20. Strategies to enhance the stability of nanoscale zero-valent iron (NZVI) in continuous BrO3− reduction
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Hamid, Shanawar, Abudanash, Damira, Han, Seunghee, Kim, Jong R., and Lee, Woojin
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- 2019
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21. Bankline Abutment Scour in Compound Channels.
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Abdelaziz, Ahmed A., Lim, Siow Y., and Kim, Jong R.
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FLOODPLAINS - Abstract
This paper presents the results of bed scouring near an abutment that spans the entire floodplain width and terminates at the edge of the main channel, termed here as the bankline abutment. The cross section can be divided into a scoured section and an un-scoured section. The scoured bed profile can be approximated using a power function. An analytical method has been suggested to predict the maximum scour depth at bankline abutment. This method is valid irrespective of whether the original bed is at or below the threshold condition of sediment motion. The proposed method is consistent with the experiments from this study and previous studies. [ABSTRACT FROM AUTHOR] more...
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- 2024
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22. Sustainable Construction through Resource Planning Systems Incorporation into Building Information Modelling
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Tokzhan Junussova, Abid Nadeem, Jong R. Kim, Salman Azhar, Malik Khalfan, and Mukesh Kashyap
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sustainability ,BIM ,ERP in AEC ,integration ,Building construction ,TH1-9745 - Abstract
The latest industrial revolution 4 enabled significant performance improvement through technological advancements. Simultaneously, the industry is setting high-level expectations for changing business practices toward long-term benefits in all three sustainability dimensions. The concept of sustainability embraces all production and operation processes in the Architecture, Engineering, and Construction (AEC) industry. This study systematically explores the literature on sustainability with Enterprise Resource Planning (ERP) and Building Information Modelling (BIM) technologies in the AEC industry and the sustainability vision for their integration. The different types of ERP and BIM implementations have similarities in addressing the broad scope of functionalities. The emergence and proliferation of ERP and BIM have brought crucial changes to the business environment. Further evolution to cloud-based operations is transforming companies from technology-oriented practices to data-centric decision-making smart infrastructures. The narrative literature review investigates the sustainability insights and ideas in ERP and BIM solutions, presenting state of the art on systems integration topics. The relevant literature was retrieved to achieve the research objectives which were qualitatively analyzed to generate the basis for further research. more...
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- 2022
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23. Photocatalytic Cementitious Material for Eco-Efficient Construction—A Systematic Literature Review
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Abdul Halim Hamdany, Alfrendo Satyanaga, Dichuan Zhang, Yongmin Kim, and Jong R. Kim
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photocatalysis ,cementitious materials ,titanium dioxide ,composite materials ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Biology (General) ,QH301-705.5 ,Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
Photoinduced processes governed by light activated TiO2 have been studied in many ways. One of the most active areas is the development of TiO2 photocatalysis technologies on their application for reducing environmental impacts. The immobilization of TiO2 on solid support, such as cementitious materials, greatly enhances its use in practical applications. In this review, a wide range of applications for achieving eco-efficient building using cementitious composite materials containing TiO2 photocatalyst was presented. The basic mechanism of photocatalysis, such as electron excitation, charge transfer process, reactive oxygen species (ROS) generation, and its role to oxidize the pollutant and microorganisms were extensively discussed. Unlike self-cleaning and air purification systems, the study on the antibacterial function of a cement-based surface containing TiO2 is very limited. In photocatalytic cementitious materials, the key element affecting the photocatalytic performance is the accessible active surface area. However, microstructure of cementitious materials changes with age due to hydration and surface carbonation. Hence, surface area reduction and mass transfer limitation become the main drawbacks of incorporating TiO2 in cementitious materials. This review, therefore, provides the state of the art in photocatalytic cement-based composite materials and identifies the areas in which future improvement is needed. more...
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- 2022
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24. Protein nanoparticle vaccine based on flagellin carrier fused to influenza conserved epitopes confers full protection against influenza A virus challenge
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Deng, Lei, Kim, Jong R., Chang, Timothy Z., Zhang, Han, Mohan, Teena, Champion, Julie A., and Wang, Bao-Zhong
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- 2017
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25. Autonomous end-to-end wireless monitoring system for railroad bridges
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Hoang, Tu, Fu, Yuguang, Mechitov, Kirill, Sánchez, Fernando Gómez, Kim, Jong R., Zhang, Dichuan, and Spencer, Jr, Billie F.
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- 2020
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26. Online adaptive radiotherapy compared to plan selection for rectal cancer: quantifying the benefit
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de Jong, R., Crama, K. F., Visser, J., van Wieringen, N., Wiersma, J., Geijsen, E. D., and Bel, A.
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- 2020
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27. Role of Bimodal Water Retention Curve on the Unsaturated Shear Strength
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Alfrendo Satyanaga, Nail Bairakhmetov, Jong R. Kim, and Sung-Woo Moon
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unsaturated shear strength ,bimodal ,water retention curve ,pore-size distribution ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Biology (General) ,QH301-705.5 ,Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
Changes in climatic conditions are expected globally resulting in a higher rainfall intensity and longer duration of rainfall. The increase in the rainwater infiltration into the soil contributes to many geotechnical issues, such as excessive settlement, retaining wall failure and rainfall-induced slope failures. These geotechnical problems could be mitigated by the improvement of the problematic soil with the incorporation of the unsaturated soil mechanic principles. Dual-porosity soils or soils with bimodal water retention curve (WRC) are able to retain more water during prolonged drying and they would be able to drain out water faster during intense rainfall to maintain the slope stability. The objective of this study is to investigate the characteristics of the unsaturated shear strength of soil with bimodal WRC. In addition, the new mathematical equation is proposed to estimate the unsaturated shear strength of soils with a bimodal WRC. The results of the study indicated that the nonlinearity of the unsaturated shear strength is a function of the shape of bimodal WRC limited by the first and second air-entry value (AEV) of dual-porosity soils. The proposed equation agreed well with the experimental data of the unsaturated shear strength for dual-porosity soil. more...
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- 2022
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28. Clash Detection Using Building Information Modeling (BIM) Technology in the Republic of Kazakhstan
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Botagoz Akhmetzhanova, Abid Nadeem, Md Aslam Hossain, and Jong R. Kim
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BIM technology in Kazakhstan ,clash detection ,reasons for clash occurrence ,BIM departments ,Building construction ,TH1-9745 - Abstract
Research on the digital built environment in the context of identifying and minimizing clashes is a critical area to investigate owing to the significant influence of clashes on the construction process. This research aims to identify the current state of building information modeling (BIM) enabled clash detection in the architecture, engineering, and construction and operation (AECO) industry of the Republic of Kazakhstan. It further identifies the main reasons for clash occurrence, methods, and practices used to decrease the workload on BIM project teams. It also recognizes the existence of BIM departments (their type and functionalities). It aims to answer whether the transition from clash detection to clash avoidance is possible in a country where BIM technology has just penetrated. This research conducted a literature review and review of current regulatory documents regarding BIM technology, interviews with industry professionals, and a survey among construction companies and design organizations. Although the AECO industry of Kazakhstan has just entered the BIM environment, this research has shown that BIM-enabled clash detection and resolution processes are trying to evolve in parallel. It was concluded that the transition is difficult in a country where document assistance with clash detection and resolution is not well developed. more...
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- 2022
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29. An Exhaustive Search Energy Optimization Method for Residential Building Envelope in Different Climatic Zones of Kazakhstan
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Mirzhan Kaderzhanov, Shazim Ali Memon, Assemgul Saurbayeva, and Jong R. Kim
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building envelope ,optimization ,OTTV ,energy consumption ,Brute Force Algorithm ,Building construction ,TH1-9745 - Abstract
Nowadays, the residential sector of Kazakhstan accounts for about 30% of the total energy consumption. Therefore, it is essential to analyze the energy estimation model for residential buildings in Kazakhstan so as to reduce energy consumption. This research is aimed to develop the Overall Thermal Transfer Value (OTTV) based Building Energy Simulation Model (BESM) for the reduction of energy consumption through the envelope of residential buildings in seven cities of Kazakhstan. A brute force optimization method was adopted to obtain the optimal envelope configuration varying window-to-wall ratio (WWR), the angle of a pitched roof, the depth of the overhang shading system, the thermal conductivity, and the thicknesses of wall composition materials. In addition, orientation-related analyses of the optimized cases were conducted. Finally, the economic evaluation of the base and optimized cases were presented. The results showed that an average energy reduction for heating was 6156.8 kWh, while for cooling it was almost 1912.17 kWh. The heating and cooling energy savings were 16.59% and 16.69%, respectively. The frontage of the building model directed towards the south in the cold season and north in the hot season demonstrated around 21% and 32% of energy reduction, respectively. The energy cost savings varied between 9657 to 119,221 ₸ for heating, 9622 to 36,088 ₸ for cooling. more...
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- 2021
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30. Stability and Consolidation of Sediment Tailings Incorporating Unsaturated Soil Mechanics
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Alfrendo Satyanaga, Martin Wijaya, Qian Zhai, Sung-Woo Moon, Jaan Pu, and Jong R. Kim
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unsaturated soil ,stability ,consolidation ,sediment ,Thermodynamics ,QC310.15-319 ,Descriptive and experimental mechanics ,QC120-168.85 - Abstract
Tailing dams are commonly used to safely store tailings without damaging the environment. Sand tailings (also called Sediment tailings) usually have a high water content and hence undergo consolidation during their placement. As the sediment tailings are usually placed above the ground water level, the degree of saturation and permeability of the sediment tailing is associated with the unsaturated condition due to the presence of negative pore-water pressure or suction. Current practices normally focus on the analyses saturated conditions. However, this consolidation process requires the flow of water between saturated and unsaturated zones to be considered. The objective of this study is to investigate the stability and consolidation of sediment tailings for the construction of road pillars considering the water flow between saturated and unsaturated zones. The scope of this study includes the unsaturated laboratory testing of sediments and numerical analyses of the road pillar. The results show that the analyses based on saturated conditions overestimate the time required to achieve a 90% degree of consolidation. The incorporation of the unsaturated soil properties is able to optimize the design of slopes for road pillars into steeper slope angles. more...
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- 2021
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31. Gaia DR3 data consistent with a short bar connected to a spiral arm.
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Vislosky, E, Minchev, I, Khoperskov, S, Martig, M, Buck, T, Hilmi, T, Ratcliffe, B, Bland-Hawthorn, J, Quillen, A C, Steinmetz, M, and de Jong, R
- Subjects
MILKY Way ,GALACTIC evolution ,GALACTIC dynamics ,COMPUTER simulation ,DATA modeling - Abstract
We use numerical simulations to model Gaia DR3 data with the aim of constraining the Milky Way (MW) bar and spiral structure parameters. We show that both the morphology and the velocity field in MW-like galactic disc models are strong functions of time, changing dramatically over a few tens of Myr. This suggests that by finding a good match to the observed radial velocity field, v
R (x, y), we can constrain the bar-spiral orientation. Incorporating uncertainties into our models is necessary to match the data; most importantly, a heliocentric distance uncertainty above 10–15 per cent distorts the bar's shape and vR quadrupole pattern morphology, and decreases its apparent angle with respect to the Sun-Galactocentric line. An excellent match to the Gaia DR3 vR (x, y) field is found for a simulation with a bar length Rb ≈ 3.6 kpc. We argue that the data are consistent with an MW bar as short as ∼3 kpc, for moderate strength inner disc spiral structure (A2 / A0 ≈ 0.25) or, alternatively, with a bar length up to ∼5.2 kpc, provided that spiral arms are quite weak (A2 / A0 ≈ 0.1), and is most likely in the process of disconnecting from a spiral arm. We demonstrate that the bar angle and distance uncertainty can similarly affect the match between our models and the data – a smaller bar angle (20° instead of 30°) requires smaller distance uncertainty (20 per cent instead of 30 per cent) to explain the observations. Fourier components of the face-on density distribution of our models suggest that the MW does not have strong m = 1 and/or m = 3 spirals near the solar radius. [ABSTRACT FROM AUTHOR] more...- Published
- 2024
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32. Preventing Ventricular Fibrillation by Flattening Cardiac Restitution
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Garfinkel, Alan, Kim, Young-Hoon, Voroshilovsky, Olga, Qu, Zhilin, Kil, Jong R., Lee, Moon-Hyoung, Karagueuzian, Hrayr S., Weiss, James N., and Chen, Peng-Sheng
- Published
- 2000
33. Coated protein nanoclusters from influenza H7N9 HA are highly immunogenic and induce robust protective immunity
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Wang, Li, Chang, Timothy Z., He, Yuan, Kim, Jong R., Wang, Shelly, Mohan, Teena, Berman, Zachary, Tompkins, S. Mark, Tripp, Ralph A., Compans, Richard W., Champion, Julie A., and Wang, Bao-Zhong
- Published
- 2017
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34. Building Information Modeling Based Building Sustainability Assessment Framework for Kazakhstan
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Gulzhanat Akhanova, Abid Nadeem, Jong R. Kim, Salman Azhar, and Malik Khalfan
- Subjects
building sustainability ,green buildings ,building information modeling ,assessment indicators ,Delphi method ,inter-rater agreement ,Building construction ,TH1-9745 - Abstract
The use of building information modeling (BIM) for building sustainability assessment (BSA) is a thriving topic within the architecture, engineering, and construction industry. Despite the various research approaches to employing BSA with BIM support, the research is limited to the BIM implications of BSA methods in developing countries. This paper presents how BIM can assist the BSA processes in Kazakhstan, using a previously developed building sustainability assessment framework for Kazakhstan (KBSAF). This framework has 46 assessment indicators grouped into nine assessment categories. The categories and assessment indicators of KBSAF were derived considering the regional variations and country-specific differences in the assessment factors. In this paper, BIM functions for BSA were identified through literature review; their applicability for KBSAF was evaluated by mapping the functions with the assessment indicators of KBSAF and a BIM-based BSA framework (BIM-KBSAF) was proposed. The proposed framework was validated through a three-round Delphi survey. One of the results demonstrates that for KBSAF, BIM can assess 24 out of 46 assessment indicators. The proposed framework could serve as a systematic guide to the application of BIM for BSA. Furthermore, it can facilitate the BSA process and save considerable time and effort. more...
- Published
- 2021
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35. Recent temperature trends in the South Central Andes reconstructed from sedimentary chrysophyte stomatocysts in Laguna Escondida (1742 m a.s.l., 38°28 S, Chile)
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De Jong, R., Schneider, T., Hernández–Almeida, I., and Grosjean, M.
- Published
- 2016
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36. Blimp-1/PRDM1 regulates the transcription of human CS1 (SLAMF7) gene in NK and B cells
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Kim, Jong R., Mathew, Stephen O., and Mathew, Porunelloor A.
- Published
- 2016
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37. Dosimetric benefit of an adaptive treatment by means of plan selection for rectal cancer patients in both short and long course radiation therapy
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de Jong, R., Visser, J., Crama, K. F., van Wieringen, N., Wiersma, J., Geijsen, E. D., and Bel, A.
- Published
- 2020
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38. Correction to: Advancing interdisciplinary research in head and neck cancer through a multicenter longitudinal prospective cohort study: the NETherlands QUality of life and BIomedical Cohort (NET-QUBIC) data warehouse and biobank
- Author
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Verdonck-de Leeuw, I. M., Jansen, F., Brakenhoff, R. H., Langendijk, J. A., Takes, R., Terhaard, C. H. J., Baatenburg de Jong, R. J., Smit, J. H., and Leemans, C. R.
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- 2019
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39. Advancing interdisciplinary research in head and neck cancer through a multicenter longitudinal prospective cohort study: the NETherlands QUality of life and BIomedical Cohort (NET-QUBIC) data warehouse and biobank
- Author
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Verdonck-de Leeuw, I.M., Jansen, F., Brakenhoff, R. H., Langendijk, J. A., Takes, R., Terhaard, C. H. J., Baatenburg de Jong, R. J., Smit, J. H., and Leemans, C. R.
- Published
- 2019
- Full Text
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40. Development and evaluation of regression tree models for predicting in-hospital mortality of a national registry of COVID-19 patients over six pandemic surges.
- Author
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Schut, M. C., Dongelmans, D. A., de Lange, D. W., Brinkman, S., Verbiest, D. P., te Velde, L. F., van Driel, E. M., Rijpstra, T., Elbers, P. H. J., Houwink, A. P. I., Georgieva, L., Verweij, E., de Jong, R. M., van Iersel, F. M., Koning, T. J. J., Rengers, E., Kusadasi, N., Erkamp, M. L., van den Berg, R., and Jacobs, C. J. M. G. more...
- Subjects
REGRESSION trees ,COVID-19 ,HOSPITAL mortality ,REGRESSION analysis ,COVID-19 pandemic ,MEDICAL registries - Abstract
Background: Objective prognostic information is essential for good clinical decision making. In case of unknown diseases, scarcity of evidence and limited tacit knowledge prevent obtaining this information. Prediction models can be useful, but need to be not only evaluated on how well they predict, but also how stable these models are under fast changing circumstances with respect to development of the disease and the corresponding clinical response. This study aims to provide interpretable and actionable insights, particularly for clinicians. We developed and evaluated two regression tree predictive models for in-hospital mortality of COVID-19 patient at admission and 24 hours (24 h) after admission, using a national registry. We performed a retrospective analysis of observational routinely collected data. Methods: Two regression tree models were developed for admission and 24 h after admission. The complexity of the trees was managed via cross validation to prevent overfitting. The predictive ability of the model was assessed via bootstrapping using the Area under the Receiver-Operating-Characteristic curve, Brier score and calibration curves. The tree models were assessed on the stability of their probabilities and predictive ability, on the selected variables, and compared to a full-fledged logistic regression model that uses variable selection and variable transformations using splines. Participants included COVID-19 patients from all ICUs participating in the Dutch National Intensive Care Evaluation (NICE) registry, who were admitted at the ICU between February 27, 2020, and November 23, 2021. From the NICE registry, we included concerned demographic data, minimum and maximum values of physiological data in the first 24 h of ICU admission and diagnoses (reason for admission as well as comorbidities) for model development. The main outcome measure was in-hospital mortality. We additionally analysed the Length-of-Stay (LoS) per patient subgroup per survival status. Results: A total of 13,369 confirmed COVID-19 patients from 70 ICUs were included (with mortality rate of 28%). The optimism-corrected AUROC of the admission tree (with seven paths) was 0.72 (95% CI: 0.71–0.74) and of the 24 h tree (with 11 paths) was 0.74 (0.74–0.77). Both regression trees yielded good calibration and variable selection for both trees was stable. Patient subgroups comprising the tree paths had comparable survival probabilities as the full-fledged logistic regression model, survival probabilities were stable over six COVID-19 surges, and subgroups were shown to have added predictive value over the individual patient variables. Conclusions: We developed and evaluated regression trees, which operate at par with a carefully crafted logistic regression model. The trees consist of homogenous subgroups of patients that are described by simple interpretable constraints on patient characteristics thereby facilitating shared decision-making. [ABSTRACT FROM AUTHOR] more...
- Published
- 2024
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41. Key Drivers for BIM-Enabled Materials Management: Insights for a Sustainable Environment.
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Junussova, Tokzhan, Nadeem, Abid, Kim, Jong R., and Azhar, Salman
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MATERIALS management ,LITERATURE reviews ,SUSTAINABILITY ,BUILDING information modeling ,SUPPLY chain management ,CONSTRUCTION management - Abstract
The value of Building Information Modelling (BIM) is widely discussed within all construction stages including the data-driven culture across building processes and sustainable impact in the long term. Yet, there is a need to explore the opportunities of BIM in improving construction materials management (CMM) as a core function of supply chain management. Due to the dearth of studies on BIM potential in improving CMM within the sustainability context, the authors examine the effectiveness and efficiency of BIM-enabled materials management, via three data streams: a literature review, an online survey, and interviews with subject matter experts in the field. This study aims to explore the drivers of BIM-enabled sustainable construction materials management. This is the preliminary study designed to test the initial hypotheses based on an online questionnaire application to derive tacit knowledge from industry and academic experts, followed by short interviews with respondents. Grounded in the comprehensive literature review, 24 indicators were defined for survey purposes. Preliminarily, 206 experts from 10 countries responded to the survey. The results show significant differences in the ranking of the indicators among the five factors. In developing countries, among two groups, industry sample awareness scales demonstrated lower understanding than among academic experts. Another finding relates to the significant agreement in scaling the importance of opportunities among industrial and academic sector experts. The research adds knowledge to deepen the understanding of opportunities of BIM-enabled materials management as a part of building project sustainable performance for industry policy and decision-makers. It also brings attention to the lack of sustainability awareness amongst industry experts in developing countries. Although materials constitute a solid part of any construction project cost, there is still a collaboration gap among designers, materials management, and, more broadly, supply chain management experts. [ABSTRACT FROM AUTHOR] more...
- Published
- 2024
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42. Group Pile Effect on Temperature Distributions inside Energy Storage Pile Foundations
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Dilnura Sailauova, Zhamilya Mamesh, Dichuan Zhang, Deuckhang Lee, Chang-Seon Shon, and Jong R. Kim
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group pile construction ,thermal transfer simulation ,energy storage pile ,dynamic analysis ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Biology (General) ,QH301-705.5 ,Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
Energy storage pile foundations are being developed for storing renewable energy by utilizing compressed air energy storage technology. Previous studies on isolated piles indicate that compressed air can result in pressure and temperature fluctuations in the pile, which can further affect safety of the pile foundation. Meanwhile, the temperature changes and distributions for the pile and surrounding soil also are influenced by adjacent piles in typical group pile constructions. Therefore, dynamic thermal transfer simulations were conducted in this paper to investigate the temperature changes and distributions in the concrete pile and surrounding soil for group pile construction. The main parameter in this study is the spacing of the piles. The analysis results show that the group pile effect significantly increases the temperature up to more than 100 °C depending on the location and changes its distribution in both concrete and soil due to the heat transferred from the adjacent piles. The final stabilized temperature can be as high as 120 °C in the concrete pile and 110 °C in the soil after numerous loading cycles, which is about 4 times higher than typical thermo-active energy pile applications. Thus, it is important to include the group pile effect for design and analysis of the energy storage pile foundation. more...
- Published
- 2020
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43. Free Vibrations with Large Amplitude of Axially Loaded Beams on an Elastic Foundation Using the Adomian Modified Decomposition Method
- Author
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Desmond Adair, Askar Ibrayev, Alima Tazabekova, and Jong R. Kim
- Subjects
Physics ,QC1-999 - Abstract
Analytical solutions describing free transverse vibrations with large amplitude of axially loaded Euler–Bernoulli beams for various end restrains resting on a Winkler one-parameter foundation are obtained using the Adomian modified decomposition method (AMDM). The AMDM allows the governing equation to become a recursive algebraic equation, and, after some additional simple mathematical operations, the equations can be cast as an eigenvector problem whose solution results in the calculation of natural frequencies and corresponding closed-form series solution of the mode shapes. Important to the use of the Adomian modified decomposition method is the treatment of the nonlinear Fredholm integral coefficient, which forms part of the governing equation. In addition to the calculation of natural frequencies and mode shapes, investigations are made of the effects on the free vibrations of the Winkler parameter and of increasing the axial loading. more...
- Published
- 2019
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44. Applicability of Hybrid Built-Up Wide Flange Steel Beams
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Hyunjin Ju, Se-Jung Lee, Sung-Mo Choi, Jong R. Kim, and Deuckhang Lee
- Subjects
built-up steel member ,different steel type ,welding ,structural experiment ,finite element method ,Mining engineering. Metallurgy ,TN1-997 - Abstract
To accommodate growing demands on either heavy steel structures or unique buildings with irregular configurations, built-up wide-flange steel (BWS) beams are being popularly used in modern steel construction. In current fabrication practices of BWS members, high-performance steels produced in steelmaking factories under the thermo-mechanical control process (TMCP) are typically utilized to achieve proper welding performances. However, since its basic unit price is quite higher than typical hot-rolled steel materials, this study introduced a hybrid BWS section for cost saving with no performance degradation, where high-performance TMCP steel was used in flanges, and conventional hot-rolled steel was adopted in web plate. To verify the tensile performances of a hybrid BWS section with non-uniform properties, split T tension and Charpy impact tests were conducted, and flexural tests were also carried out on hybrid and homogeneous BWS beam members. On this basis, it was confirmed that the structural performance of the hybrid BWS member is comparable with that of the conventional one with a uniform section property. more...
- Published
- 2020
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45. The Efficacy of Ketogenic Diet for Specific Genetic Mutation in Developmental and Epileptic Encephalopathy
- Author
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Ara Ko, Da E. Jung, Se H. Kim, Hoon-Chul Kang, Joon S. Lee, Seung T. Lee, Jong R. Choi, and Heung D. Kim
- Subjects
developmental and epileptic encephalopathy ,ketogenic diet ,next-generation sequencing ,mutation ,precision medicine ,Neurology. Diseases of the nervous system ,RC346-429 - Abstract
Objectives: Pathogenic mutations in developmental and epileptic encephalopathy (DEE) are increasingly being discovered. However, little has been known about effective targeted treatments for this rare disorder. Here, we assessed the efficacy of ketogenic diet (KD) according to the genes responsible for DEE.Methods: We retrospectively evaluated the data from 333 patients who underwent a targeted next-generation sequencing panel for DEE, 155 of whom had tried KD. Patients showing ≥90% seizure reduction from baseline were considered responders. The KD efficacy was examined at 3, 6, and 12 months after initiation. Patients were divided into those with an identified pathogenic mutation (n = 73) and those without (n = 82). The KD efficacy in patients with each identified pathogenic mutation was compared with that in patients without identified genetic mutations.Results: The responder rate to KD in the patients with identified pathogenic mutations (n = 73) was 52.1, 49.3, and 43.8% at 3, 6, and 12 months after initiation, respectively. Patients with mutations in SCN1A (n = 18, responder rate = 77.8%, p = 0.001), KCNQ2 (n = 6, responder rate = 83.3%, p = 0.022), STXBP1 (n = 4, responder rate = 100.0%, p = 0.015), and SCN2A (n = 3, responder rate = 100.0%, p = 0.041) showed significantly better responses to KD than patients without identified genetic mutations. Patients with CDKL5 encephalopathy (n = 10, responder rate = 0.0%, p = 0.031) showed significantly less-favorable responses to KD.Conclusions: The responder rate to KD remained consistent after KD in DEE patients with specific pathogenic mutations. KD is effective in patients with DEE with genetic etiology, especially in patients with SCN1A, KCNQ2, STXBP1, and SCN2A mutations, but is less effective in patients with CDKL5 mutations. Therefore, identifying the causative gene can help predict the efficacy of KD in patients with DEE. more...
- Published
- 2018
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46. Comparison of patient characteristics and long-term mortality between transferred and non-transferred COVID-19 patients in Dutch intensive care units: A national cohort study
- Author
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Wortel, Safira A., Bakhshi-Raiez, Ferishta, Termorshuizen, Fabian, de Lange, Dylan W., Dongelmans, Dave A., de Keizer, Nicolette F., Arbous, M. S., Barnas, M. G. W., Bindels, A. J. G. H., Boer, D. P., Bosman, R. J., Brunnekreef, G. B., de Bruin, M. Th., de Graaff, M., de Jong, R. M., de Meijer, A. R., de Ruijter, W., de Waal, R., Dijkhuizen, A., Dormans, T. P. J., Draisma, A., Drogt, I., Eikemans, B. J. W., Elbers, P. W. G., Epker, J. L., Erkamp, M. L., Festen-Spanjer, B., Frenzel, T., Gommers, D., Gritters, N. C., Hené, I. Z., Hoeksema, M., Holtkamp, J. W. M., Hoogendoorn, M. E., Houwink, A. P. I., Jacobs, C. J. M. G., Janssen, I. T. A., Kieft, H., Koetsier, M. P., Koning, T. J. J., Kusadasi, N., Lens, J. A., Lutisan, J. G., Mehagnoul-Schipper, D. J., Moolenaar, D., Nooteboom, F., Pruijsten, R. V., Ramnarain, D., Reidinga, A. C., Rengers, E., Rijkeboer, A. A., Rozendaal, F. W., Schnabel, R. M., Silderhuis, V. M., Spijkstra, J. J., Spronk, P., te Velde, L. F., Urlings-Strop, L. C., van Bussel, B. C. T., van den Berg, A. E., van den Berg, R., van der Voort, P. H. J., van Driel, E. M., van Gulik, L., van Iersel, F. M., van Lieshout, M., van Slobbe-Bijlsma, E. R., van Tellingen, M., Vandeputte, J., Verbiest, D. P., Versluis, D. J., Verweij, E., Mos, M. Vrolijk-de, Wesselink, R. M. J., Graduate School, Medical Informatics, APH - Methodology, APH - Quality of Care, Intensive Care Medicine, APH - Digital Health, Radiology and Nuclear Medicine, ACS - Microcirculation, and ANS - Neurovascular Disorders more...
- Subjects
COVID-19 ,intrahospital transfer ,severity of illness ,intensive care unit ,mortality - Abstract
Background: COVID-19 patients were often transferred to other intensive care units (ICUs) to prevent that ICUs would reach their maximum capacity. However, transferring ICU patients is not free of risk. We aim to compare the characteristics and outcomes of transferred versus non-transferred COVID-19 ICU patients in the Netherlands. Methods: We included adult COVID-19 patients admitted to Dutch ICUs between March 1, 2020 and July 1, 2021. We compared the patient characteristics and outcomes of non-transferred and transferred patients and used a Directed Acyclic Graph to identify potential confounders in the relationship between transfer and mortality. We used these confounders in a Cox regression model with left truncation at the day of transfer to analyze the effect of transfers on mortality during the 180 days after ICU admission. Results: We included 10,209 patients: 7395 non-transferred and 2814 (27.6%) transferred patients. In both groups, the median age was 64 years. Transferred patients were mostly ventilated at ICU admission (83.7% vs. 56.2%) and included a larger proportion of low-risk patients (70.3% vs. 66.5% with mortality risk more...
- Published
- 2022
47. Zenker’s diverticulum: Rotterdam experience
- Author
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Visser, L. J., Hardillo, J. A. U., Monserez, D. A., Wieringa, M. H., and Baatenburg de Jong, R. J.
- Published
- 2016
- Full Text
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48. Teachers' Expectations of Teacher-Student Interaction: Complementary and Distinctive Expectancy Patterns
- Author
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de Jong, R. J., van Tartwijk, J., and Verloop, N.
- Abstract
In this study it is investigated what student responses teachers expect in particular teacher behaviour vignettes, and whether experience and gender produce differences in expectations. Teacher behaviour vignettes were presented to teachers (N = 46), who described the student responses they anticipated. Anticipated student responses were then rated on their level of control and affiliation. Results indicated teachers' expectations were indeed complementary except for hostile vignettes, where teachers expected more submissive responses than other populations. There were no significant differences as a result of experience, however, female teachers expected friendlier responses than male teachers in friendly as well as in hostile vignettes. (Contains 2 figures and 2 tables.) more...
- Published
- 2012
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49. Evaluation of the Environmental Performance of Residential Building Envelope Components
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Serik Tokbolat, Farnush Nazipov, Jong R. Kim, and Ferhat Karaca
- Subjects
life cycle assessment ,building envelope ,environmental impact ,embodied energy ,greenhouse gas emissions ,Technology - Abstract
The role of buildings in the context of addressing the consequences of climate change and the energy deficit is becoming increasingly important due to their share in the overall amount of green house gas (GHG) emissions and rapidly growing domestic energy consumption worldwide. Adherence to a sustainability agenda requires ever-increasing attention to all stages of a building′s life, as such approach allows for the consideration of environmental impacts of a building, from design, through construction stages, until the final phase of a building′s life—demolition. A life cycle assessment (LCA) is one of the most recognized and adopted models for the evaluation of the environmental performance of materials and processes. This paper aims to perform an LCA of four different types of residential buildings in Nur-Sultan, Kazakhstan. The assessment primarily considered embodied energy and GHG emissions as key assessment indicators. Findings suggest that the operational stage contributed to more than half of the GHG emissions in all the cases. The results of the study indicate that there is a dependence between the comfort levels and the impact of the buildings on the environment. The higher the comfort levels, the higher the impacts in terms of the CO2 equivalent. This conclusion is most likely to be related to the fact that the higher the comfort level, the higher the environmental cost of the materials. A similar correlation can be observed in the case of comparing building comfort levels and life-cycle impacts per user. There are fewer occupants per square meter as the comfort level increases. Furthermore, the obtained results suggest potential ways of reducing the overall environmental impact of the building envelope components. more...
- Published
- 2019
- Full Text
- View/download PDF
50. Temperature Distributions inside Concrete Sections of Renewable Energy Storage Pile Foundations
- Author
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Dichuan Zhang, Zhamilya Mamesh, Dilnura Sailauova, Chang-Seon Shon, Deuckhang Lee, and Jong R. Kim
- Subjects
concrete pile foundation ,compressed air ,renewable energy storage ,heat transfer analysis ,non-steady state response ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Biology (General) ,QH301-705.5 ,Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
A new pile foundation system is being developed for renewable energy storage through a multi-disciplinary research project. This system utilizes the compressed air technology to store renewable energy inside the reinforced concrete pile foundation configured with hollowed sections. The compressed air can result in high air pressure to which the structural response of the pile foundation subjected has been studied. However, the temperature in the pile foundation can be affected by the compressed air if sufficient cooling is not provided. The temperature change can generate thermal stresses and affect the structural safety of the pile foundation. As a first step to investigate this thermal effect, this paper studies temperature distributions inside the concrete section for the pile foundation through non-steady state heat transfer analyses. Several parameters were considered in the study, including thermal conductivities of the concrete, specific heat capacities of the concrete, and dimensions of the pile foundation. It has been found that the temperature distribution along the concrete section varies significantly during a daily energy storage cycle as well as subsequent cycles due to the cumulative effect of residual temperatures at the end of each cycle. The temperature distribution is largely affected by the thermal conductivity of the concrete and the geometry of the pile foundation. The obtained temperature distribution can be used for investigation of the thermal stress inside the foundation and surrounding soil. more...
- Published
- 2019
- Full Text
- View/download PDF
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