Results 1 to 10 of about 441,585 (267)

Concavities of the margins of focal bone lesions on MRI: a retrospective study of 586 cases [PDF]

Insights into Imaging
Objectives Except for a few specific lesions, the analysis of the margins of focal bone lesions with MRI has been largely overlooked in the literature. We observed that some lesions exhibited concave margins, suggesting a non-aggressive nature.
Abdulrazak Kalaaji, Anthony De Leeuw, Simon Henry, Nathalie Boutry, Sammy Badr, Anne Cotten   +5 more
doaj   +2 more sources

Experimental and Numerical Investigation of the Heat Transfer of Honeycomb-Structured Tubes

Thermo, 2023
Tube bundle recuperators are generally designed to operate with smooth tubes. Structured tubes can be used to increase the efficiency of recuperators. Compared to smooth tubes, the surface for heat transfer is increased and thus heat transfer is enhanced.
Eileen Trampe, Dominik Büschgens, Herbert Pfeifer   +2 more
doaj   +1 more source

A Novel Smart Optimized Capacitance-Based Sensor for Annular Two-Phase Flow Metering With High Sensitivity

IEEE Access, 2023
Accurately determining phase fractions in two-phase flows is among the most significant issues in Industries related to the production and processing of petroleum and petrochemicals.
Rahmad B. Y. Syah, Aryan Veisi, Zainal Arifin Hasibuan, Mustafa A. Al-Fayoumi, Mohammad Sh. Daoud, Ehsan Eftekhari-Zadeh   +5 more
doaj   +1 more source

Assessment of Turbulence Models over a Curved Hill Flow with Passive Scalar Transport

Energies, 2022
An incoming canonical spatially developing turbulent boundary layer (SDTBL) over a 2-D curved hill is numerically investigated via the Reynolds-averaged Navier–Stokes (RANS) equations plus two eddy-viscosity models: the K−ω SST (henceforth SST) and the ...
David Paeres, Christian Lagares, Guillermo Araya   +2 more
doaj   +1 more source

Construction of Concave PdAg Nanoshells with Limited Thickness for Efficient Electroxidation of Ethanol

Frontiers in Materials, 2021
Noble metal nanocrystals enclosed with curved surfaces are of great benefit for applications in electrocatalysis since the atomic steps and kinks on these facets have higher chemical activity.
Quanlin Wu, Gongguo Zhang, Na Zhao, Yiqun Zheng, Yanyun Ma, Feng Liu, Maochang Liu   +6 more
doaj   +1 more source

Calculation of cams with concave profile in the MATHCAD system [PDF]

Омский научный вестник, 2022
The article shows the features of the cam with concave profile, the method of kinematic calculation of the pusher when it moves along a concave and rounded surface.
V. V. Ryndin, Yu. P. Makushev, T. A. Polyakova, L. Yu. Volkova   +3 more
doaj   +1 more source

Seat-to-Head Transmissibility Responses of Seated Human Body Coupled with Visco-Elastic Seats

Vibration, 2022
This study investigated the seat-to-head vibration transmissibility (STHT) responses of 58 subjects (31 males and 27 females) seated on three different elastic seats with (WB) and without back support (NB) and under three levels of vertical vibration (0 ...
K. N. Dewangan, Yumeng Yao, S. Rakheja
doaj   +1 more source

Gender and Anthropometric Effects on Seat-to-Head Transmissibility Responses to Vertical Whole-Body Vibration of Humans Seated on an Elastic Seat

Vibration, 2023
This study investigated the effects of gender and ten different anthropometric parameters on the vertical vibration transmission from seat to the head of the body seated on an elastic seat.
Yumeng Yao, Krishna N. Dewangan, Subhash Rakheja   +2 more
doaj   +1 more source

Investigating the influences of concave depths on stormwater runoff and pollution retention of urban grasslands

Water Science and Technology, 2022
In this study, scale-based runoff plots of concave grasslands were designed and simulated rainfall experiments were conducted to investigate their retention effectiveness for runoff volume and pollutant loads, and to analyze the influences of concave ...
Wen Liu, Zhixiang Lu
doaj   +1 more source

Effect of Concave Stave on Class I Barrel-Stave Flextensional Transducer

Micromachines, 2021
To meet the requirements of low frequency, high power, small size and light weight, a type of Class I barrel-stave flextensional transducer employing improved concave stave is presented.
Duo Teng, Xiaoyong Liu, Feng Gao
doaj   +1 more source