Results 21 to 30 of about 2,442,222 (305)

A Strategic Design Route to Find a Depleted Uranium High-Entropy Alloy with Great Strength

Metals, 2022
The empirical parameters of mixing enthalpy (ΔHmix), mixing entropy (ΔSmix), atomic radius difference (δ), valence electron concentration (VEC), etc., are used in this study to design a depleted uranium high-entropy alloy (HEA).
Weiran Zhang, Yasong Li, Peter K. Liaw, Yong Zhang   +3 more
doaj   +1 more source

Voluntary exercise can strengthen the circadian system in aged mice [PDF]

, 2013
Consistent daily rhythms are important to healthy aging according to studies linking disrupted circadian rhythms with negative health impacts. We studied the effects of age and exercise on baseline circadian rhythms and on the circadian system's ability ...
A Davidson, A Power, A Watanabe, AA Kondratova, AC King, AJ Davidson, AJ Davidson, B Rusak, C Castillo, CJ Guenthner, DE Kolker, DF Swaab, DJ Buysse, DJ Dijk, DJ Foley, DJ Foley, E Satinoff, E. Zimmerman, EK Baehr, F Aujard, G. S. Lall, GJ Tranah, GS Passos, H Albus, H Li, H. Queenan, HT vanderLeest, I. Song, IN Karatsoreos, J Schaap, K Cho, KJ Reid, M Asai, M Harrington, M Münch, M Nagano, M Palomba, M. E. Harrington, MA Grandner, MJ Duncan, MJ Duncan, MU Gillette, MW Greene, MW Marlatt, N Mrosovsky, O Castanon-Cervantes, P. C. Molyneux, PC Yannielli, RD Nebes, S Ancoli-Israel, S Benloucif, S Farajnia, S Kiessling, S Yamazaki, S Yamazaki, S Yamazaki, S. M. Biello, SH Yoo, SJ Aton, SM Biello, T Deboer, T Yoshikawa, T. L. Leise, TA Bedrosian, TA Martino, TA Martino, TJ Nakamura, TL Leise, U Abraham, U Albrecht, VS Valentinuzzi, W Nakamura, Y Tahara, Y Zhang, Y Zhang   +74 more
core   +2 more sources

Securing guarantees : how nuclear proliferation can strengthen great power commitments [PDF]

, 2018
The number of states with nuclear weapons has grown at a much slower rate than many predicted during the early years of the Cold War. Yet the reasons for this slow rate of proliferation are not well understood.
Phillips, Julianne Nicole
core   +1 more source

Improving tensile strength and impact toughness of plasticized poly(lactic acid) biocomposites by incorporating nanofibrillated cellulose

Nanotechnology Reviews, 2022
Poly(lactic acid) (PLA) biocomposites are usually plasticized to overcome the problem of poor ductility, which decreases the valuable tensile strength.
Tian Jiarong, Cao Zhongqi, Qian Shaoping, Xia Yingbo, Zhang Jiaxi, Kong Yingqi, Sheng Kuichuan, Zhang Ying, Wan Yi, Takahashi Jun   +9 more
doaj   +1 more source

Hybrid Effect of PVA Fibre and Carbon Nanotube on the Mechanical Properties and Microstructure of Geopolymers

Frontiers in Materials, 2021
The concept of geopolymers has been widely studied since it was proposed. However, the wide range of applications of geopolymers is affected by brittleness and poor crack resistance.
Tao Meng, Xiufen Yang, Yue Yu, Yue Yu, Hongming Yu, Hongming Yu, Miaozhou Huang, Miaozhou Huang   +7 more
doaj   +1 more source

Comparison of the Effects of Quality Improvement Strategies on Prevention of Mother-to-Child HIV Transmission in a Public and a Private Hospital in Lesotho

Journal of the International Association of Providers of AIDS Care, 2019
We compared quality improvement (QI) interventions for prevention of mother-to-child transmission in a private hospital and a government hospital (GH). From November 2013 to October 2016, data were extracted retrospectively for HIV-positive mothers and ...
Kelello L. M. Lerotholi MD, Manone Rantekoa BSc., N, MPH, Khotso G. Mahlalefa BSc, Lerato Hlehlisi BSN, MPH, Aurora O. Amoah PhD, MPP, MPH   +4 more
doaj   +1 more source

Strengthening of alumina

International Journal of High Technology Ceramics, 1986
Relatively large Al2O3 disc particles (16μm, 41μm) with high aspect ratios (5-20) were incorporated into a fine-grain Al2O3 matrix (-1μm) in order to improve the mechanical properties of sintered Al2O3. The flexural strength depends on the disc size and the microstructure of composites.
Tetsuo UCHIYAMA, Koichi NIIHARA, Toshio HIRAI   +2 more
openaire   +2 more sources

Applying Quality Improvement Approaches to Reduce Mother-to-Child HIV Transmission and Improve Health and Nutrition Care in Five Countries: Lessons from the Partnership for HIV-Free Survival

Journal of the International Association of Providers of AIDS Care, 2019
The World Health Organization guidelines for treating pregnant HIV-positive women and preventing HIV transmission to infants now recommend lifelong antiretroviral treatment for pregnant and breastfeeding women. We applied quality improvement (QI) methods
Amy F. Stern MHS, Anisa Ismail MPH, Esther Karamagi MBChb, MSc, Tamara Nsubuga-Nyombi BSc, MPHDC, Stella Kasindi Mwita MD, MPH, Monica M. Ngonyani MSc, Kevin Kinyua MbCHb, Prisca Muange MBChB, MPH, MSc, Kelello L. M. Lerotholi MD, Manone Rantekoa BScN, MPH, Khotso G. Mahlalefa BSc, Maureen Fatsani Tshabalala RNM, BBA, MPH, Nigel Livesley MD, MPH   +12 more
doaj   +1 more source

Reducing Mother-to-Child Transmission of HIV Using Quality Improvement Approaches

Journal of the International Association of Providers of AIDS Care, 2019
Over half of mother-to-child HIV transmission (MTCT) occurs postdelivery. Keeping mother–infant pairs in care remains challenging. Health workers in 3 countries used quality improvement (QI) approaches to improve data systems, mother–infant retention ...
Nigel Livesley MD, MPH, Astou Coly PhD, MPH, Esther Karamagi MBChb, MSc, Tamara Nsubuga-Nyombi BSc, MPHDC, Stella Kasindi Mwita MD, MPH, Monica M. Ngonyani MSc, Jane Mvungi MD, MPH, Kevin Kinyua MbCHb, Prisca Muange MBChB, MPH, MSc, Anisa Ismail MPH, Timothy Quick PhD, MS, Amy Stern MHS   +11 more
doaj   +1 more source

Strengthening Neighbourhood Substitution [PDF]

, 2020
Domain reduction is an essential tool for solving the constraint satisfaction problem (CSP). In the binary CSP, neighbourhood substitution consists in eliminating a value if there exists another value which can be substituted for it in each constraint.
openaire   +2 more sources