Results 71 to 80 of about 957,306 (285)

A multicenter survey on profile of care for hip fracture: predictors of mortality and disability.

, 2010
Summary Because delay in time to surgery beyond 24–48 h has been observed in many studies to be associated with adverse outcomes, a survey in nine centers in Italy was undertaken to examine the impact of time to surgery on mortality and disability at 6 ...
Saugo M, Siviero P, Hip Fracture Study Group, Besdine RW, Maggi S, Wetle T, CREPALDI, GAETANO   +6 more
core   +1 more source

Phase Field Failure Modeling: Brittle‐Ductile Dual‐Phase Microstructures under Compressive Loading

Advanced Engineering Materials, EarlyView.
The approach by Amor and the approach by Miehe and Zhang for asymmetric damage behavior in the phase field method for fracture are compared regarding their fitness for microcrack‐based failure modeling. The comparison is performed for the case of a dual‐phase microstructure with a brittle and a ductile constituent.
Jakob Huber, Jan Torgersen, Ewald Werner
wiley   +1 more source

Thermal conductivity measurement of liquids in a microfluidic device [PDF]

, 2010
A new microfluidic-based approach to measuring liquid thermal conductivity is developed to address the requirement in many practical applications for measurements using small (microlitre) sample size and integration into a compact device.
M. R. Bown, Newton, M.I., Allen, R. W.K., Ge, Rile, Ge, R., Kuvshinov, Dmitriy, MacInnes, J. M., Hardacre, C., Hardacre, C.; id_orcid, Doy, N., McHale, G., Allen, R. W K, Newton, Michael, Bown, Mark, Aldous, L., Allen, R.W.K., Newton, M. I., R. Ge, Hardacre, Christopher, N. Doy, D. Kuvshinov, Allen, Ray, Doy, Nicola, Kuvshinov, D., Bown, M.R., L. Aldous, MacInnes, Jordan, R. W. K. Allen, Allen, R. W. K., McHale, Glen, J. M. MacInnes, G. McHale, Aldous, Leigh, C. Hardacre, MacInnes, J.M., M. I. Newton, Bown, M. R.   +36 more
core   +1 more source

Microstructure‐Controlled Crack Propagation and Fracture Resistance in MoSiBTiC Alloy Revealed by Multiscale Extended Finite Element Method Modeling

Advanced Engineering Materials, EarlyView.
A two‐dimensional multiscale finite element analysis framework was established for the first‐generation MoSiBTiC alloy, and the mechanical and fracture‐related parameters of the constituent phases were calibrated through experiments and simulations. The framework provides a basis for analyzing crack propagation behavior in its complex microstructure ...
Junfeng Du, Takahiro Kaneko, Xinyu Yan, Takahito Ohmura, Kyosuke Yoshimi   +4 more
wiley   +1 more source

Microstructure Evolution of a VMnFeCoNi High‐Entropy Alloy After Synthesis, Swaging, and Annealing

Advanced Engineering Materials, EarlyView.
The synthesis and processing (rotary swaging and annealing) of the novel VMnFeCoNi alloy is investigated, alongside the estimation of the grain size effect on hardness. Analysis of a wide grain size range of recrystallized microstructures (12–210 µm) reveals a low annealing twin density.
Aditya Srinivasan Tirunilai, Zeki Ayrildi, Buse Şen, Maik Rajkowski, Mathias Redondo Garcia, Markus Stricker, Guillaume Laplanche   +6 more
wiley   +1 more source

How flow velocity affects the conductivity of propped coal fracture: New insights

International Journal of Coal Science & Technology
The conductivity of propped fracture in coal exerts a profound effect on the transport of coalbed methane (CBM) from low-permeable coal seams with hydraulic fracturing stimulation.
Ruishuai Ma, Jiyuan Zhang, Qihong Feng, Zhejun Pan, Sen Wang, Liang Wang, Youjun Yang   +6 more
doaj   +1 more source

Experimental study on main controlling factors influencing fracture conductivity under discontinuous proppant placement

Shiyou shiyan dizhi
To investigate efficient and low-cost approaches for enhancing fracture conductivity, the impacts of discontinuous (cluster-type) proppant placement on fracture conductivity were systematically studied, and its main controlling factors and applicable ...
Haicheng Sun
doaj   +1 more source

Statistical analyses of reservoir and fracturing parameters for a multifractured shale oil reservoir in Mississippi

Energy Science & Engineering, 2020
The use of multifractured horizontal wells has improved the efficiency of hydrocarbon extraction from shale gas and oil plays. It is highly desirable to estimate the characteristics of the reservoir and well fracturing through production data analysis ...
Xu Yang, Boyun Guo
doaj   +1 more source

Zoledronic Acid in Reducing Clinical Fracture and Mortality after Hip Fracture.

, 2007
BACKGROUND: Mortality is increased after a hip fracture, and strategies that improve outcomes are needed. METHODS: In this randomized, double-blind, placebo-controlled trial, 1065 patients were assigned to receive yearly intravenous zoledronic acid (at a
Moore, K.A., Lyles, K.W., Boonen, S., Nordsletten, L., Abrams, K., Hodgson, P.K., Colón-Emeric, C.S., Recknor, C., Eriksen, E.F., Mesenbrink, P., Adachi, J.D., Pieper, C.F., Hyldstrup, L., Magaziner, J.S., Horowitz, Z., Orloff, J.J., Mautalen, C., Lavecchia, C., Zhang, J., for the HORIZON Recurrent Fracture, Trial   +19 more
core   +1 more source

Hydrogen‐Assisted Fracture of Iron‐Based Fe–Ni–Al Alloys

Advanced Engineering Materials, EarlyView.
Principal relations and fracture mechanisms of single‐phase and precipitate‐strengthened Fe–Ni–Al alloys subjected to prior electrochemical hydrogen charging are identified. The mechanisms of hydrogen effect on strength and microhardness are discussed, including hydrogen‐induced increase in microhardness and the role of hydrogen in fracture behavior ...
Nataliya Yadzhak, Olha Zvirko, Rostyslav Leshchak, Hryhoriy Nykyforchyn   +3 more
wiley   +1 more source