Results 71 to 80 of about 1,013,931 (235)

Analysis of piston oscillation cooling characteristics of OP2S engine piston

Case Studies in Thermal Engineering
The Opposed-Piston Two-Stroke (OP2S) engine is renowned for its high power density and significant thermal load, necessitating the incorporation of an internal cooling oil chamber within the piston to facilitate forced cooling.
Yong Liu, Xiaofeng Zhang, Cenbo Xiong, Fukang Ma, Yijie Song   +4 more
doaj   +1 more source

Potentiel et limites d'utilisation, aux températures élevées, des lubrifiants liquides dans les moteurs Potential and Limitations of Use of Liquid Lubricants in Engines At High Temperatures

Oil & Gas Science and Technology, 2006
Cet article examine les possibilités de réponse de la formulation des lubrifiants à une élévation des températures dans les moteurs automobiles de la prochaine décennie; l'accroissement des puissances spécifiques des moteurs, et la réduction de leurs ...
Toulhoat H.
doaj   +1 more source

Views of Vidigal: negotiating opportunities and risks in a gentrifying favela in Rio de Janeiro Favela avec vue : négocier opportunités et risques dans un quartier en voie de gentrification à Rio de Janeiro

Journal of the Royal Anthropological Institute, EarlyView.
The contested dynamics of slum gentrification in Rio de Janeiro came into focus during the brief period of relative peace brought by the pacification policy leading up to the 2016 Olympics. In this unprecedented moment, Rio's South Zone favela residents experienced a respite from the daily confrontations with police operations and drug trade violence ...
Angela Torresan
wiley   +1 more source

Minimum requirements for feedback enhanced force sensing

, 2013
The problem of estimating an unknown force driving a linear oscillator is revisited. When using linear measurement, feedback is often cited as a mechanism to enhance bandwidth or sensitivity.
Bowen, Warwick P., Doherty, Andrew C., Harris, Glen I., McAuslan, David L., Stace, Thomas M.   +4 more
core   +1 more source

Cavity Optomechanics of Topological Spin Textures in Magnetic Insulators [PDF]

, 2018
Collective dynamics of topological magnetic textures can be thought of as a massive particle moving in a magnetic pinning potential. We demonstrate that inside a cavity resonator this effective mechanical system can feel the electromagnetic radiation ...
Kishine, Jun-ichiro, Ovchinnikov, Alexander S., Proskurin, Igor, Stamps, Robert L.   +3 more
core   +1 more source

Offspring performance does not explain oviposition preference in the leafminer Stigmella sorbi (Lepidoptera: Nepticulidae): a tri‐trophic perspective

Insect Science, EarlyView.
We studied oviposition site selection in a leaf‐mining moth (Stigmella sorbi) on rowan trees (Sorbus aucuparia) in northwestern Russia, assessing larval performance across different shoot types, leaf positions, and leaflets. Larval survival was highest on long vegetative shoots, yet females showed no preference for these optimal sites.
Mikhail V. Kozlov, Vitali Zverev
wiley   +1 more source

An Optomechanical Oscillator on a Silicon Chip [PDF]

, 2010
The recent observation on radiation-pressure-driven self-sustained oscillation in high-Q optical microresonators has created new possibilities for development of photonic devices that benefit from unique functionalities offered by these “optomechanical ...
Hossein-Zadeh, Mani, Vahala, Kerry J.
core   +1 more source

Behavioral, Ecological, and Morphological Data Suggest a Close Relationship Between the Ant Colobopsis truncata and the Gall Wasp Aphelonyx cerricola

Integrative Zoology, EarlyView.
Aphelonyx cerricola and the different stages that make this gall colonizable by ants. ABSTRACT Wasps of the family Cynipidae are known to induce galls of a species‐specific morphology, which during senescence provide a refuge for secondary insect fauna, especially ants.
Daniele Giannetti, Diego Gil‐Tapetado, Enrico Schifani, Elia Nalini, Donato A. Grasso, Carlo Polidori   +5 more
wiley   +1 more source

TECHNOLOGICAL PECULIARITIES OF PRODUCTION OF PISTONS FOR HIGH-POWERED ENGINES

Литьë и металлургия, 2009
The paper present the results obtained when investigating fabrication of castings for pistons of high-augmented diesel internal combustion engine. The optimum casting parameter ranges are determined.
M. A. Sadoha, A. T. Volochko, V. V. Ovchinnikov   +2 more
doaj  

Trapped Atoms and Superradiance on an Integrated Nanophotonic Microring Circuit

Physical Review X
Interfacing cold atoms with integrated nanophotonic devices could offer new paradigms for engineering atom-light interactions and provide a potentially scalable route for quantum sensing, metrology, and quantum information processing. However, it remains
Xinchao Zhou, Hikaru Tamura, Tzu-Han Chang, Chen-Lung Hung   +3 more
doaj   +1 more source