Results 151 to 160 of about 1,341,415 (398)

Method and apparatus for phasing segmented mirror arrays [PDF]

, 1992
A method and an apparatus are disclosed for edge phasing an array of segments in a segmented primary telescope mirror using white light from a far field source and starting with the inner edge of each segment in the first ring of segments.
Manhart, Paul K.
core   +1 more source

Novel Quinazolinones Active against Multidrug‐Resistant Mycobacterium Tuberculosis: Synthesis, Antimicrobial Evaluation, and in Silico Exploration of Penicillin‐Binding Protein 1A as a Potential Target

ChemMedChem, EarlyView.
Quinazolinone‐based compounds emerge as potent antimycobacterial agents, showing low minimum inhibitory concentrations against drug‐resistant Mycobacterium tuberculosis. Molecular modeling uncovers a novel allosteric site in PonA1 targeted by these derivatives.
Marek Kerda, Daria Nawrot, Petr Šlechta, Miroslav Domanský, Asal Askari, Hanieh Kamangar, Ondřej Janďourek, Klára Konečná, Pavla Paterová, Ingrid Hlbočanová, Miloslav Macháček, Matteo Mori, Fiorella Meneghetti, Martin Doležal, Jan Zitko, Ghada Bouz   +15 more
wiley   +1 more source

Tests of oil scraper piston ring and piston fitted with oil drain holes [PDF]

Tests were conducted to determine whether or not a properly located and properly designed oil scraper piston ring, installed on a piston provided with oil drain holes of sufficient area, would prevent the excessive oiling of the Liberty engine ...
Mcdewell, H S
core   +1 more source

DETAILED SPACIAL AND TIME RESOLVED STUDIES OF LUBRICANT DEGRADATION IN MULTI-CYLINDER DIESEL ENGINES [PDF]

, 2000
This work formed part of the North American Space Agency /US Department of Energy project to produce a 55% thermodynamic efficient diesel engine, which required the construction of a "low heat rejection" engine.
Jones, Craig J
core  

Late Pleistocene to Holocene sedimentation in the Great Blue Hole (Lighthouse Reef, Belize): Results from a 30 m long core

The Depositional Record, EarlyView.
A 30 m long sedimentary succession at the bottom of the Belize Blue Hole represents terrestrial cenote (12.5–7.2 ka BP), restricted marine swamp (7.2–5.7 ka BP) and fully marine lagoonal phases (5.7–0 ka BP) on Lighthouse Reef carbonate platform. Post‐glacial and Holocene sea‐level rise largely controlled the sedimentological, faunal and floral changes
Eberhard Gischler, Dominik Schmitt, Annika Wiegand, Hermann Behling, Lyudmila Shumilovskikh, Martin Melles, Volker Wennrich, Elija Nolte, Jozef Grego, Flavio S. Anselmetti, Hendrik Vogel, Daniel Birgel, Jörn Peckmann   +12 more
wiley   +1 more source

Design Method of the Stroke Ring Based on Deformation Pre-Compensation

Actuators
A common consensus is that an optimized curve profile of the stroke ring in the multiple-stroke piston motor can make the output torque more stable.
Gaocheng An, Kai Gao, Hongquan Dong, Baoyu Liu, Lin Li, Zhenhua Hu   +5 more
doaj   +1 more source

Lubricant degradation, transport and the effect of extended oil drain intervals on piston assembly tribology [PDF]

, 2006
There are ever increasing demands on lubricant manufacturers to meet governmental legislation and customer needs by improving fuel economy, engine durability and exhaust system compatibility as shown by the introduction of GF4 and move towards GF5 ...
Chung, S., Lee, P.M., Lindsay-Smith, J.R., Priest, M., Stark, M.S., Taylor, R.I., Wilkinson, J.J.   +6 more
core  

In situ loading of a pore network model for quantitative characterization and visualization of gas seepage in coal rocks

Deep Underground Science and Engineering, EarlyView.
Fine modeling of a three‐dimensional fracture structure under dynamic loading of coal is carried out. The streamline distribution law of pressure and velocity field in the loading process of the coal specimen is analyzed, the absolute permeability of the coal specimen is calculated, and the feasibility of the pore network model algorithm and finite ...
Huazhe Jiao, Xi Chen, Tiegang Zhang, Quilligan Michael, Yixuan Yang, Xiaolin Yang, Tongyi Yang   +6 more
wiley   +1 more source

Effects of Surface Irregularities on Piston Ring-Cylinder Tribo Pair of a Two Stroke Motor Engine in Hydrodynamic Lubrication [PDF]

Tribology in Industry, 2015
Tribological parameters such as friction, lubrication and wear influence strongly the engine component's life. In this study, a piston ring-cylinder system simulated taking into account the surface modifications under fully flooded lubrication and normal
A. Zavos, P. Nikolakopoulos
doaj  

Radiation of Pistons and Rings on Oblate and Prolate Spheroidal Baffles [PDF]

, 1967
Marvin A. Blizard, James F. Dillon
openalex   +1 more source