منابع مشابه
Rolls-Royce Merlin
The Rolls-Royce Merlin engines were a series of 12 cylinder, 60° "V", 27 litre, liquid cooled piston aircraft engines built during World War II by Rolls-Royce, and under licence in the United States by Packard. They are widely considered to be among the most successful aero engines produced during World War II, and perhaps the finest piston engines ever built for aviation. Merlins are highly so...
متن کاملEvaluation of Thermo-mechanical stress in work rolls of ring rolling mill under thermal and mechanical loading
The defect in work rolls directly influence the forming cost and the final shape of the product. The researchers tend to investigate the thermo-mechanical stress in work roll of rolling machines. These stresses may reduce the roll life. Since the investigation of the thermo-mechanical stress in work roll with real-conditions is complex, comprehensive studies by means of numerical methods are av...
متن کاملOperation Monitoring of Rotating Rolls
Operation monitoring of paper machinery is financially essential due to improved quality of the end product and increased machine lifetime. Rotating cylinders in rolling contact are essential parts when manipulating paper web. Roll stability is becoming more and more important since the paper machine speeds are still increasing. Dynamical instability of rolls leads to contact vibrations in roll...
متن کاملAbnormal Rolls in Hybrid
We report experimental and theoretical results on the conductive regime of electroconvection in hybrid aligned nematics. The drifting oblique/normal rolls below/above the Lifshitz frequency are observed at the onset of electroconvection under a.c. voltage. The experimental data on the threshold voltage, wavelength, oblique angle and drift period of the rolls as function of a.c. frequency are in...
متن کاملNeutrophil CD44 rafts and rolls.
Functional E-selectin ligands identified on murine neutrophils include E-selectin ligand-1 (ESL-1), PSGL-1, and CD44. So far, PSGL-1 is the only ligand reported to support neutrophil slow rolling over inflamed venules.1,2 In this issue of Blood, Yago et al3 identify CD44 and new components to an existing intracellular kinase signaling cascade in neutrophils that activates LFA-1 integrins to ena...
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ژورنال
عنوان ژورنال: Zen Nihon Shinkyu Gakkai zasshi (Journal of the Japan Society of Acupuncture and Moxibustion)
سال: 1997
ISSN: 1882-661X,0285-9955
DOI: 10.3777/jjsam.47.37