Search

Your search keyword '"Chen, W. -S"' showing total 769 results
Start Over Author "Chen, W. -S"
769 results on '"Chen, W. -S"'

3. Nanometer-thick molecular beam epitaxy Al films capped with in situ deposited Al2O3—High-crystallinity, morphology, and superconductivity.

Author

Lin, Y. H. G., Cheng, C. K., Young, L. B., Chiang, L. S., Chen, W. S., Lai, K. H., Chiu, S. P., Wu, C. T., Liang, C. T., Lin, J. J., Hsu, C. H., Lin, Y. H., Kwo, J., and Hong, M.

Subjects
SCANNING transmission electron microscopy, MOLECULAR beam epitaxy, SURFACE roughness, ALUMINUM ores, SUPERCONDUCTING circuits
Abstract

Achieving high material perfection in aluminum (Al) films and their associated Al/AlOx heterostructures is essential for enhancing the coherence time in superconducting quantum circuits. We grew Al films with thicknesses ranging from 3 to 30 nanometers (nm) epitaxially on sapphire substrates using molecular beam epitaxy (MBE). An integral aspect of our work involved electron-beam (e-beam) evaporation to directly deposit aluminum oxide (Al2O3) films on the freshly grown ultrathin epitaxial Al films in an ultra-high-vacuum (UHV) environment. This in situ oxide deposition is critical for preventing the oxidation of parts of the Al films, avoiding the formation of undesired native oxides, and thereby preserving the nm-thick Al films in their pristine conditions. The thicknesses of our Al films in the study were accurately determined; for example, coherence lengths of 3.0 and 20.2 nm were measured in the nominal 3.0 and 20 nm thick Al films, respectively. These Al films were epitaxially grown on sapphire substrates, showing an orientational relationship, denoted as Al (111) ⟨ 2 1 ¯ 1 ¯ ⟩ ∥ sapphire (0001) [ 2 1 ¯ 1 ¯ 0 ]. The Al/sapphire interface was atomically ordered without any interfacial layers, as confirmed by in situ reflection high-energy electron diffraction (RHEED) and cross-sectional scanning transmission electron microscopy (STEM). All sample surfaces exhibited smoothness with a roughness in the range of 0.1–0.2 nm. The Al films are superconducting with critical temperatures ranging from 1.23 to around 2 K, depending on the film thickness. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

7. Gut microbiome modulates response to anti–PD-1 immunotherapy in melanoma patients

Author

Gopalakrishnan, V., Spencer, C. N., Nezi, L., Reuben, A., Andrews, M. C., Karpinets, T. V., Prieto, P. A., Vicente, D., Hoffman, K., Wei, S. C., Cogdill, A. P., Zhao, L., Hudgens, C. W., Hutchinson, D. S., Manzo, T., de Macedo, M. Petaccia, Cotechini, T., Kumar, T., Chen, W. S., Reddy, S. M., Sloane, R. Szczepaniak, Galloway-Pena, J., Jiang, H., Chen, P. L., Shpall, E. J., Rezvani, K., Alousi, A. M., Chemaly, R. F., Shelburne, S., Vence, L. M., Okhuysen, P. C., Jensen, V. B., Swennes, A. G., McAllister, F., Sanchez, E. Marcelo Riquelme, Zhang, Y., Le Chatelier, E., Zitvogel, L., Pons, N., Austin-Breneman, J. L., Haydu, L. E., Burton, E. M., Gardner, J. M., Sirmans, E., Hu, J., Lazar, A. J., Tsujikawa, T., Diab, A., Tawbi, H., Glitza, I. C., Hwu, W. J., Patel, S. P., Woodman, S. E., Amaria, R. N., Davies, M. A., Gershenwald, J. E., Hwu, P., Lee, J. E., Zhang, J., Coussens, L. M., Cooper, Z. A., Futreal, P. A., Daniel, C. R., Ajami, N. J., Petrosino, J. F., Tetzlaff, M. T., Sharma, P., Allison, J. P., Jenq, R. R., and Wargo, J. A.

Published
2018

20. The vehicle collision warning on urban road based on internet of vehicles data.

Author

Chen, W. S., Zhou, Z. G., Tuo, L. F., and Lin, J. X.

Subjects
*ALARMS, *KALMAN filtering, *SPACE vehicles, *INTERNET, *FALSE alarms, *WARNINGS
Abstract

It is of great significance to provide early warning for vehicle collisions on urban roads. In order to overcome the high missing rate and low warning accuracy and poor efficiency of traditional early warning methods, an urban road vehicle collision early warning method based on Internet of Vehicles data was proposed. The extended Kalman filter is used to estimate the vehicle attitude on urban roads, and the vehicle longitudinal safety distance model is established. Based on the Internet of Vehicles, the position, speed, acceleration and heading information of follow-up vehicles on urban roads and vehicles in front of urban roads are obtained, and the dispersion of vehicle spacing changes is obtained. The dispersion is used as the judgment threshold of urban road vehicle collision warning to realize collision warning. The experimental results show that the average false alarm rate is 1.2%, the maximum false alarm rate is only 1%, and the alarm time is only 19.9s. [ABSTRACT FROM AUTHOR]

Published
2022
Full Text
View/download PDF

28. Antinociceptive activity and chemical composition of constituents from Caragana microphylla seeds

Author

Huo, Y., Guo, C., Zhang, Q.-Y., Chen, W.-S., Zheng, H.-C., Rahman, K., and Qin, L.-P.

Subjects
Mimosaceae -- Composition -- Health aspects -- Research, Legumes -- Composition -- Health aspects -- Research, Pain -- Care and treatment, Beans -- Composition -- Health aspects -- Research, Biological sciences, Health, Science and technology
Abstract

Abstract This investigation was undertaken to ascertain the antinociceptive activity of Caragana microphylla Lam. seeds and isolate and characterize the constituents. Antinociceptive activity was screened using acetic acid-induced abdominal constriction [...]

Published
2007

43. Erratum

Author

Wang, J-W, Chen, W-S, Lin, P-C, Hsu, C-S, and Wang, C-J.

Published
2010

Catalog

Books, media, physical & digital resources
See catalog results