Results 61 to 70 of about 1,111,226 (344)

A 73‐Year‐Old Man With Several Years of Difficulty Climbing Stairs and Frequent Tripping

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT A 73‐year‐old man presented with progressive weakness and atrophy predominantly affecting the distal finger flexors and quadriceps muscles. Electrophysiological studies demonstrated mixed myogenic and neurogenic features. Muscle MRI showed inflammatory changes, and muscle biopsy revealed granulomatous myositis with histologic features ...
Mehmet Can Sari, Arens Taga, Sonya Ulrike Steele, Ahmet Hoke   +3 more
wiley   +1 more source

Dust size distributions in coagulation/fragmentation equilibrium: Numerical solutions and analytical fits

, 2010
Context. Grains in circumstellar disks are believed to grow by mutual collisions and subsequent sticking due to surface forces. Results of many fields of research involving circumstellar disks, such as radiative transfer calculations, disk chemistry ...
Birnstiel, Birnstiel, Birnstiel, Blum, Blum, Brauer, Brauer, Brauer, C. P. Dullemond, C. W. Ormel, Camacho, Cossins, Dohnanyi, Dubrulle, Dullemond, Dullemond, Garaud, Güttler, Hunt, Johansen, Klett, Kobayashi, Kretke, Makino, Mathis, Nakagawa, Natta, Ormel, Ormel, Paszun, Pollack, Pushkin, Ricci, Rodmann, Sano, Schräpler, T. Birnstiel, Tanaka, Tanaka, Testi, Wardle, Weidenschilling, Weidenschilling, Weidenschilling, Weidenschilling, Weidling, Williams, Wyatt, Youdin, Zsom   +49 more
core   +1 more source

High cycle fatigue of ARMCO iron severely deformed by ECAP [PDF]

, 2017
The high-cycle fatigue behavior of ARMCO iron severely deformed by Equal Channel Angular Pressing (ECAP) at room temperature through route Bc until 8 passes, with an average grain size of ~365 nm, was studied and compared with the same material in the ...
Cabrera Marrero, José M., Higuera Cobos, Oscar Fabián, Muñoz Bolaños, Jairo Alberto   +2 more
core   +2 more sources

Effect of bridgmanite-ferropericlase grain size evolution on Earth’s average mantle viscosity: implications for mantle convection in early and present-day Earth

Progress in Earth and Planetary Science
Recent experimental investigations of grain size evolution in bridgmanite-ferropericlase assemblages have suggested very slow growth for these bimodal phases.
Jyotirmoy Paul, Gregor J. Golabek, Antoine B. Rozel, Paul J. Tackley, Tomoo Katsura, Hongzhan Fei   +5 more
doaj   +1 more source

Numerical and Experimental Investigation of the Influence of Growth Restriction on Grain Size in Binary Cu Alloys

Metals, 2017
Grain refinement by elemental addition has been extensively investigated within the last decades in Al or Mg alloys. In contrast, in the Cu system, the role of solute on grain size is less investigated.
Andreas Cziegler, Olga Geraseva, Peter Schumacher   +2 more
doaj   +1 more source

Enhancing Corrosion Resistance and Mechanical Strength of 3D‐Printed Iron Polylactic Acid for Marine Applications via Laser Surface Texturing

Advanced Engineering Materials, EarlyView.
Laser surface texturing significantly improves the corrosion resistance and mechanical strength of 3D‐printed iron polylactic acid (Ir‐PLA) for marine applications. Optimal laser parameters reduce corrosion by 80% and enhance tensile strength by 25% and ductility by 15%.
Mohammad Rezayat, Mojtaba Karamimoghadam, Mohammadreza Lalegani Dezaki, Ali Zolfagharian, Giuseppe Casalino, Antonio Mateo, Mahdi Bodaghi   +6 more
wiley   +1 more source

Grain refinement control in TIG arc welding [PDF]

, 1975
A method for controlling grain size and weld puddle agitation in a tungsten electrode inert gas welding system to produce fine, even grain size and distribution is disclosed.
Iceland, W. F., Whiffen, E. L.
core   +1 more source

Mechanical properties of Mg-8Gd-3Y-0.5Zr alloy with bimodal grain size distributions

Journal of Magnesium and Alloys, 2017
The Mg-Gd-Y-Zn-Zr alloys are representational and potential age-hardening systems as reported in the past ten years, but their mechanical properties are still dependent on the grain size and its distribution. The effect of bimodal structure on mechanical
J.H. He, L. Jin, F.H. Wang, S. Dong, J. Dong   +4 more
doaj   +1 more source

Wide Grain 3, a GRAS Protein, Interacts with DLT to Regulate Grain Size and Brassinosteroid Signaling in Rice

Rice, 2022
Background: Grain size is a direct determinant of grain weight and yield in rice; however, the genetic and molecular mechanisms determining grain size remain largely unknown.
Weilan Chen, Xiaoling Hu, Li Hu, Xinyue Hou, Zhengyan Xu, Fanmin Yang, Min Yuan, Feifan Chen, Yunxiao Wang, Bin Tu, Ting Li, Liangzhu Kang, Shiwen Tang, Bingtian Ma, Yuping Wang, Shigui Li, Peng Qin, Hua Yuan   +17 more
doaj   +1 more source

Evaluation of the Potential of Laser Shock Peening Compared with Cold Expansion for Improving Fatigue Resistance of Riveted Lap Joints of Aerospace Grade 7175 Al Alloy

Advanced Engineering Materials, EarlyView.
This study investigates laser shock peening for enhancing fatigue performance of riveted aerospace aluminum joints. A comparative approach with cold expansion combines fatigue testing and synchrotron X‐ray methods. Integrating mechanical testing with residual stress and strain characterization provides insights into how different treatments affect the ...
Ogün Baris Tapar, David Osman Busse, Maximilian Sprengel, Domenico Furfari, Marc‐André Nielsen, Guilherme Abreu Faria, Jérémy Epp   +6 more
wiley   +1 more source