Search

Your search keyword '"Nguyen, D.T."' showing total 621 results
Start Over Author "Nguyen, D.T."
621 results on '"Nguyen, D.T."'

4. Influence of the content of complex additives on the deformation properties of cement

Author

Svetlana V. Samchenko, Dmitriy A. Zorin, Nguyen D.T. Lam, and Tang V. Lam

Subjects
composite additive, cement deformation, gypsum, tripoli, alumina cement, experiment planning, regression equation, Construction industry, HD9715-9717.5
Abstract

Introduction. When using concrete and reinforced concrete structures, it is necessary to overcome problems associated with the quality of concrete to shrink in size and experience shrinkage during hardening and drying. To solve problems with shrinkage, special attention is paid to the materials that, when added to ordinary portland cement, make it possible to obtain non-shrinkable, expanding types of cements. A well-known way of producing expanding cements is to grind cement clinker, gypsum and a special additive together. In addition, the introduction of active mineral additives with pozzolanic properties allows to compact the structure of the cement stone, reduce porosity, increase strength and reduce shrinkage. They also save the clinker for the cement production, help to reduce the cost of production and help to reduce the burden on the environment. One of these mineral additives is tripoli.Materials and methods. The effect of additives content on the deformation property of the composite binger was studied using the experiment planning method. Deformation of cement at the age of 2, 3, 7, 14 and 28 days were determined in accordance with the method of results processing in accordance with GOST R 56727–2015, GOST 11052–74. The research was carried out in the laboratory of the Department of Construction Materials Science of the Moscow State University of Civil Engineering.Results. The results obtained are presented as the surface of a second level regression equation describing the dependence of the blinder deformation on the content of complex expanding and pozzolanic additives. As a result of the experiments conducted, the composition with the maximum expansion and the composition with maximum shrinkage using complex additives were obtained. The results will be further used to predict the deformation properties of the binder.Conclusions. Based on the results of this study, the authors will continue to study the properties of binders based on a complex expanding and pozzolanic additive in the future.

Published
2023
Full Text
View/download PDF

33. (196) A Novel Simultaneous Heart-Kidney (sHK) Transplantation Risk Calculator Predicts Chronic Dialysis or Death at 1-Year: A UNOS Analysis

Author

Kumar, S., primary, Nguyen, D.T., additional, Graviss, E.A., additional, Patil, S., additional, Kim, J.H., additional, Suarez, E.E., additional, Hussain, I., additional, Yousefzai, R., additional, Ahsan, S.A., additional, Gorthi, J., additional, Kassi, M., additional, Bhimaraj, A., additional, Martin, C.M., additional, and Guha, A., additional

Published
2023
Full Text
View/download PDF

38. Maxillary ostium preservation in ethmoidectomy.

Author

Pollet-Thiollier, A., Jankowski, R., Rumeau, C., and Nguyen, D.T.

Subjects
PARANASAL sinuses, NASAL polyps, GENERAL anesthesia, SPHINCTERS, NITRIC oxide
Abstract

The paranasal sinuses play a role in producing and storing nitric oxide (NO). NO is a powerful antiviral and antibacterial gas which may be involved in the non-specific immune defenses of the respiratory tract. Conducted by the inspiratory current at the alveolar-capillary membrane, it increases pulmonary venous blood oxygenation. NO is actively released in the form of independent boluses in the respiratory tract, thanks to a sphincter function that can be identified during ethmoidectomy under general anesthesia. Safeguarding paranasal sinus physiology necessarily involves conserving this ostial sphincter function, which is essential to the respiratory role of the paranasal sinuses. Although it has not yet been demonstrated that the destruction of this ostial function has measurable consequences for respiratory function, it makes sense to avoid systematic antrostomy and to preserve this ostial function whenever possible, depending on the clinical conditions. This technical note describes step-by-step how to conserve the maxillary ostium, in the example of radical ethmoidectomy with mucosal ablation for nasal polyposis (nasalization). It is illustrated by two videos. The discussion focuses on the respective indications for ostial preservation and middle meatotomy (antrostomy). [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

45. Sinusology

Author

Jankowski, R., Nguyen, D.T., Poussel, M., Chenuel, B., Gallet, P., and Rumeau, C.

Published
2016
Full Text
View/download PDF

46. The occurrence of Simpson's paradox if site-level effect was ignored in the TREAT Asia HIV Observational Database

Author

Ly, P.S., Khol, V., Zhang, F.J., Zhao, H.X., Han, N., Lee, M.P., Li, P.C.K., Lam, W., Chan, Y.T., Kumarasamy, N., Saghayam, S., Ezhilarasi, C., Pujari, S., Joshi, K., Gaikwad, S., Chitalikar, A., Merati, T.P., Wirawan, D.N., Yuliana, F., Yunihastuti, E., Imran, D., Widhani, A., Oka, S., Tanuma, J., Nishijima, T., Choi, J.Y., Na, S., Kim, J.M., Sim, B.L.H., Gani, Y.M., David, R., Kamarulzaman, A., Syed Omar, S.F., Ponnampalavanar, S., Azwa, I., Mustafa, M., Nordin, N., Ditangco, R., Uy, E., Bantique, R., Wong, W.W., Ku, W.W., Wu, P.C., Ng, O.T., Lim, P.L., Lee, L.S., Martinez-Vega, R., Phanuphak, P., Ruxrungtham, K., Avihingsanon, A., Chusut, P., Kiertiburanakul, S., Sungkanuparph, S., Chumla, L., Sanmeema, N., Chaiwarith, R., Sirisanthana, T., Kotarathititum, W., Praparattanapan, J., Kantipong, P., Kambua, P., Ratanasuwan, W., Sriondee, R., Nguyen, K.V., Bui, V.H., Nguyen, D.T.H., Nguyen, D.T., Pham, T.T., Cuong, D.D., Ha, H.L., Sohn, A.H., Durier, N., Petersen, B., Cooper, D.A., Law, M.G., Jiamsakul, A., Boettiger, D.C., Jiamsakul, Awachana, Kerr, Stephen J., Chandrasekaran, Ezhilarasi, Huelgas, Aizobelle, Taecharoenkul, Sineenart, Teeraananchai, Sirinya, Wan, Gang, Ly, Penh Sun, Kiertiburanakul, Sasisopin, and Law, Matthew

Published
2016
Full Text
View/download PDF

49. PARTICLE DEPOSITION STUDY IN A HORIZONTAL SQUARE CHANNEL USING HIGH-RESOLUTION IMAGING

Author

Orea D., Chavez R., Nguyen D.T., Vaghetto R., Anand N. K., Hassan Y. A., and Sabharwall P.

Subjects
particles deposition, non-intrusive optical measurements, Physics, QC1-999
Abstract

The ongoing research at Texas A&M University (TAMU) aims to develop and implement measurement techniques to quantify fission product transport and related phenomena in a Gas-Cooled Fast Reactor (GCFR). This study summarizes the experimental measurements performed in a Proof-of-Concept Facility (PCF) to understand particle transport under various Reynolds numbers. Using high-resolution high-magnification optical measurement techniques, surrogate particle deposition was measured on the bottom wall surface of the PCF. The particle deposition over time was observed to decrease as the Reynolds number increased. In addition, the particle spatial distributions increased approaching the side wall of the PCF. This state-of-the art optical technique allows for the non-intrusive measurements of micron-sized particles near the wall surface.

Published
2021
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results