Results 21 to 30 of about 353,031 (193)

QCD and spin effects in black hole airshowers [PDF]

, 2007
In models with large extra dimensions, black holes may be produced in high-energy particle collisions. We revisit the physics of black hole formation in extensive airshowers from ultrahigh-energy cosmic rays, focusing on collisional QCD and black hole ...
Arunava Roy, Marco Cavaglià, S. C. Park   +2 more
core   +3 more sources

Micro black holes and the democratic transition [PDF]

Physical Review D, 2009
Unitarity implies that the evaporation of microscopic quasi-classical black holes cannot be universal in different particle species. This creates a puzzle, since it conflicts with the thermal nature of quasi-classical black holes, according to which all the species should see the same horizon and be produced with the same Hawking temperatures.
Dvali, Gia, Pujolas, Oriol
openaire   +3 more sources

The Effects of a Micro Hole in the First Convolution of a Bellows with Positive Rotation Angle on the Stress Behaviour

Engineering Transactions, 2016
A bellows is widely used as the element of an expansion joint in various piping system. It suffers from axial movement, lateral deflection and angular rotation caused by vibration, thermal expansion, etc.
Jinbong KIM
doaj   +1 more source

Improving the precision of micro-EDM for blind holes in titanium alloy by fixed reference axial compensation

Reviews on Advanced Materials Science, 2021
During the electrical discharge machining (EDM) process, the tool electrode wear is inevitable, which affects the process precision of the micro-hole.
Lin Chaohui, Li Jiaming, Liang Shiyong, Zhang Yonghui, Gou Junfeng, Liu Jiangwen, Li Yao   +6 more
doaj   +1 more source

Experimental Verification of the Pumping Effect Caused by the Micro-Tapered Hole in a Piezoelectric Atomizer

Sensors, 2018
In this study, we examined the use of a dynamic micro-tapered hole as a micro-scale tapered flow tube valveless piezoelectric pump. Firstly, we obtained photographs of a micro-tapered hole by using an environmental scanning electron microscope (ESEM ...
Jianhui Zhang, Qiufeng Yan, Jun Huang, Chuanyu Wu   +3 more
doaj   +1 more source

Coupling strength control in photonic crystal/photonic wire multiple cavity devices [PDF]

, 2009
Resonance splitting has been demonstrated for two coupled micro-cavities with control of the free spectral range between the resonance peaks, together with a normalised transmission level of approximately 60%.
A.R. Md Zain, Ahmad, Brien, M. Sorel, Md Zain, N.P. Johnson, R.M. De La Rue   +6 more
core   +1 more source

Precision EDM of Micron-Scale Diameter Hole Array Using in-Process Wire Electro-Discharge Grinding High-Aspect-Ratio Microelectrodes

Micromachines, 2020
Micro-electrical discharge machining (micro-EDM) is a good candidate for processing micro-hole arrays, which are critical features of micro-electro-mechanical systems (MEMS), diesel injector nozzles, inkjet printheads and turbine blades, etc.
Zhixiang Zou, Zhongning Guo, Qinming Huang, Taiman Yue, Jiangwen Liu, Xiaolei Chen   +5 more
doaj   +1 more source

Antireflection silicon structures with hydrophobic property fabricated by three-beam laser interference [PDF]

, 2015
This paper demonstrates antireflective structures on silicon wafer surfaces with hydrophobic property fabricated by three-beam laser interference. In this work, a three-beam laser interference system was set up to generate periodic micro-nano hole ...
Atwater, D. Li, Dobrzański, Iyengar, J. Zhang, L. Cao, L. Li, L. Zhao, Li, Meng, Moharam, Motamedi, Nosonovsky, Peng, Peng, Raguin, Sahoo, Sai, Sivasubramaniam, Sparber, Wang, Wang, Wang, Y. Yue, Yeo, Z. Wang, Zhang   +26 more
core   +1 more source

Investigation on the Electrochemical Micromachining of Micro Through-Hole by Using Micro Helical Electrode

Micromachines, 2020
The instability of machining process caused by the difficulty of the electrolyte refresh in electrochemical micromachining (EMM) of micro through-hole has been an unsolved problem. Thus, this paper investigates the electrochemical micromachining of micro
Baohui Liu, Hang Zou, Haixuan Luo, Xiaoming Yue   +3 more
doaj   +1 more source

Investigation on Cutting Performance of Micro-Textured Cutting Tools

Micromachines, 2019
This paper explores the influence of micro textures on cutting performance of polycrystalline cubic boron nitride (PCBN) tools from two aspects, that is, tool wear and machined surface roughness.
Qinghua Li, Chen Pan, Yuxin Jiao, Kaixing Hu   +3 more
doaj   +1 more source