Hover performance of a twin-rotor test model in terms of rotor overlap sweep, blade collective pitch, and blade tip speedwasexaminedexperimentally.The experimental setup consisted of two three-bladed rotors (tandem rotor configuration) with a diameter of1,220 mm and constant chord of 38 mm, giving a blade aspect ratio of 16.05. The blades were of a rectangular planform with NACA 0012 cross-sect...

eleven goat breeds of different origin (10 spanish and 1 african) were considered for this study: zambian dwarf, azpi-gorri, blanca-andaluza, blanca-celtibérica, blanca de rasquera, catalana, malagueña, moncaína, murciano-granadina, negra serrana and pyrenean. nine linear body measurements for females, as well as the body weight ratio between gender and body weight, were obtained from literatur...

BACKGROUND As a result of low numbers and diversity in study type, occupational health intervention studies are not easy to locate in electronic literature databases. AIM To develop a search strategy that facilitates finding occupational health intervention studies in Medline, both for researchers and practitioners. METHODS A gold standard of articles was created by going through two whole ...

Fibre reinforced plastics are increasing their importance as one of the most interesting groups of material on account of their low weight, high strength and stiffness. To obtain good quality holes, it is important to identify the type of material, ply stacking sequence and fibre orientation. In this paper, the drilling of quasi-isotropic hybrid carbon+glass/epoxy plates is analyzed. Two commer...

Past research has provided evidence that older adults have more difficulty than younger adults in discriminating small differences in lifted weight (i.e., the difference threshold for older adults is higher than that of younger adults). Given this result, one might expect that older adults would demonstrate similar impairments in weight ratio perception (a suprathreshold judgment) compared to y...

quantum dots are new types of fluorescent materials for biological labeling. as a result, qds toxicity study is an essential requirement for future clinical applications. therefore, the cytotoxic cdse:zns quantum dots effects on some organs in mice are presented in this study. in this work, 10, 20 and 40 mg/kg doses of cdse:zns quantum dots were injected to 32 adult male mice. structural and op...

The TW Hydrae system is perhaps the closest analog to the early solar nebula. We have used the Very Large Array to image TW Hya at wavelengths of 7 mm and 3.6 cm with resolutions of 0&farcs;1 ( approximately 5 AU) and 1&farcs;0 ( approximately 50 AU), respectively. The 7 mm emission is extended and appears dominated by a dusty disk of radius greater than 50 AU surrounding the star. The 3.6 cm e...

With thrust weight ratio increasing, integral panel is an important component to reduce the aircraft weight, and it a great challenge ensure forming accuracy mechanical property in large-scale panel. Laser shock has development prospect realizing improving its properties. This work investigated unequal alternate double-sided laser forming, which can make 7075 aluminum form induce hardened layer...

In this study, the relationship between growth of abalone and presence epibionts was investigated in cultured Goheung, Jeollanam-do, where there are severe problems high water temperatures attachment. The experiment conducted for eight months (May-December 2020), 40 were collected every month. Water temperature at its highest a range 13.5°C–26.6°C dissolved oxygen levels their lowest 4.0–10.2 ?...