Low-loss gears are an interesting design approach for increasing the efficiency and thermal load limits of gearboxes. The loss-optimized gear geometry concentrates sliding around pitch point, which results in low load-dependent power losses. In this study, a method modeling transient EHL (elastohydrodynamically lubricated) contacts mesh considering mixed lubrication effects is introduced applie...

The DECi-hertz Interferometer Gravitational wave Observatory (DECIGO) is designed to detect gravitational waves at frequencies between 0.1 and 10 Hz. In this frequency band, one of the most important science targets detection primordial waves. DECIGO plans use a space interferometer with optical cavities increase its sensitivity. For evaluating sensitivity, diffraction laser light has be adequa...

ObjectiveTo test the hypothesis that telomere shortening and/or loss are risk factors for infertility.DesignRetrospective analysis of status in patients with infertility using conventional cytogenetic data collected prospectively.SettingAcademic centers.Patient(s)Cytogenetic slides cultured peripheral lymphocytes from 50 undergoing fertility treatment and 150 healthy donors, including 100 donor...

purpose: to report the rate of vitreous loss during phacoemulsification and its contributing risk factors in patients operated on at labbafinejad medical center.  methods: this prospective comparative descriptive study included patients with cataract undergoing phacoemulsification by ophthalmology residents or cornea fellows from november 2006 to november 2007. all patients underwent a complete...

Background Hearing loss is the most common congenital disorder the incidence of which is further increased in the presence of risk factors for hearing loss among newborns admitted to the neonatal intensive care unit (NICU). The aim of this study was early diagnosis and intervention for hearing loss in newborns discharged from NICU. Materials and Methods This prospective cohort study was conduct...

conclusions the significant difference between groups 1 and 3 permits to establish a correlation between degree of nicotine addiction and hearing loss. however, further studies are needed to identify the mechanisms leading to hearing loss. patients and methods the study recruited smokers (100) and non-smokers as a reference group (100) aged 21 to 50 years living in noisy or quiet areas of beiru...