Results 71 to 80 of about 120,407 (285)

Drop Splashing on a Dry Smooth Surface

, 2005
The corona splash due to the impact of a liquid drop on a smooth dry substrate is investigated with high speed photography. A striking phenomenon is observed: splashing can be completely suppressed by decreasing the pressure of the surrounding gas.
A. L. Yarin, A. M. Worthington, C. D. Stow, F. V. Shaw, H. E. Edgerton, J. L. Zable, L. D. Landau, Lei Xu, O. G. Engel, Sidney R. Nagel, Wendy W. Zhang   +10 more
core   +1 more source

High redshift evolution of optically and IR-selected galaxies: a comparison with CDM scenarios [PDF]

, 1999
A combination of ground-based (NTT and VLT) and HST (HDF-N and HDF-S) public imaging surveys have been used to collect a sample of 1712 I-selected and 319 $K\leq 21$ galaxies. Photometric redshifts have been obtained for all these galaxies.
Adriano Fontana, Alan Moorwood, Arnouts, Arnouts, Baugh, Bernardi, Cohen, Cole, Connolly, Cowie, Cowie, Da Costa, Emanuele Giallongo, Fernandez-Soto, Fontana, Francesco Poli, Giallongo, Guiderdoni, Heyl, Hughes, Kauffmann, Kauffmann, Lacey, Lilly, Madau, Madau, Menci, Nicola Menci, Paolo Saracco, Pascarelle, Pei, Poli, Sandro D'Odorico, Saracco, Schade, Somerville, Somerville, Stefano Cristiani, Steidel, Treyer, White   +40 more
core   +4 more sources

Collision‐Resilient Winged Drones Enabled by Tensegrity Structures

Advanced Robotics Research, EarlyView.
Based on structures of birds such as the woodpeck, this article presents the collision‐resilient aerial robot, SWIFT. SWIFT leverages tensegrity structures in the fuselage and wings which allow it to undergo large deformations in a crash, without sustaining damage. Experiments show that SWIFT can reduce impact forces by 70% over conventional structures.
Omar Aloui, Raphael Zufferey, William Stewart, Mohammad Askari, Simon Jeger, Dario Floreano   +5 more
wiley   +1 more source

Thermally Induced Creep and Viscoelastic Behavior of Copper Micropillar Arrays

Advanced Science, EarlyView.
Copper micropillar arrays are fabricated by electrodeposition within through‐glass‐via, and their thermally induced time‐dependent deformation is quantified. Nanoindentation creep, EBSD, and TEM reveal a heat‐treatment‐driven transition between grain‐boundary‐mediated deformation and dislocation‐dominated creep, while Kelvin modeling captures ...
Miao Wang, Jihua Zhang, Libin Gao, Hongwei Chen, Wenbo Luo, Wenlei Li, Mingcheng Chen, Mengru Li, Dongbin Wang, Shuang Li, Ting Liu, Xingzhou Cai, Yong Li, Bin Peng, Wanli Zhang   +14 more
wiley   +1 more source

Systematically Engineering for Efficient Production of 3‐Methyl‐1‐Butanol in Escherichia coli

Advanced Science, EarlyView.
An integrated metabolic engineering strategy was established for high‐level 3‐methyl‐1‐butanol biosynthesis in Escherichia coli. Molecular dynamics‐guided semi‐rational engineering of dihydroxyacid dehydratase uncovered and relieved key catalytic bottlenecks, while adaptive laboratory evolution enhanced strain robustness.
Nanfei Geng, Hao Liu, Haolin Han, Meng Meng, Shaojie Wang, Tianwei Tan, Haijia Su   +6 more
wiley   +1 more source

Experimental study on the mechanical and acoustic emission features of frozen single fractured sandstone under drop hammer impact

Gong-kuang zidonghua
Mining rock masses in high-altitude cold regions can experience instability due to low temperature environments and dynamic load disturbances. Existing research mostly focuses on the static features of fractured sandstone under different freezing ...
HE Xinyao, CHANG Yuan, REN Fuqiang
doaj   +1 more source

Occam's hammer: a link between randomized learning and multiple testing FDR control

, 2006
We establish a generic theoretical tool to construct probabilistic bounds for algorithms where the output is a subset of objects from an initial pool of candidates (or more generally, a probability distribution on said pool). This general device, dubbed "
Blanchard, Gilles, Fleuret, François
core   +1 more source

Piezo1 Channel Mediates Mechanically Programmable Drug Delivery to Potentiate Intravesical Chemotherapy

Advanced Science, EarlyView.
This study utilizes programmable mechanical pressure as a therapeutic enhancer to establish a mechano‐chemotherapy strategy. Controlled pressure activates the mechanosensitive ion channel Piezo1 in bladder cancer, triggering a calcium ion cascade that transiently and reversibly amplifies membrane permeability to chemotherapeutics.
Minghai Ma, Xing Li, Minxuan Jing, Zezhong Yang, Jiale He, Jianpeng Li, Xiao Liang, Yunzhong Jiang, Rou Huang, Yuanquan Zhang, Yuanchun Pu, Jiawei Xiu, Yutong Chen, Kaibo Mi, Pu Zhang, Lei Wang, Jinhai Fan   +16 more
wiley   +1 more source

From the voice of a ‘Socratic Gadfly’: a call for more academic activism in the researching of disability in postsecondary education [PDF]

, 2017
In this article I use the lens of voices and silences to frame my review of research in the field of disability and postsecondary education. I argue that we need to view research in this field as a necessarily political act that seeks to turn voices of ...
Seale, Jane K
core   +1 more source

Covalent Bonds Reinforced Strength and Modulus of Heterocyclic Aramid Fiber by Interfacial Aminated‐MXene Nanosheets

Advanced Science, EarlyView.
We demonstrate the covalent bonds strategy to enhance the mechanical property of PBIA fiber by using interfacial MXene‐NH2 nanosheets. The MXene‐NH2 nanosheets with reactive amino sites that can serve as nucleating agents and chain anchors to enhance orientation, crystallinity and interchain interaction of PBIA fiber via strong interfacial amido ...
Boyuan Chen, Hansheng Liu, Weiheng Kong, Ke Han, Jing Fang, Xingjiang Wu, Jianhong Xu, Hao Li   +7 more
wiley   +1 more source