UNLABELLED This study measured the facial dimensions of Korean Air Force (KAF) pilots, to design a pilot oxygen mask, and compared them with those of Korean civilians and US Air Force (USAF) personnel. Twenty-two facial dimensions were measured for 278 KAF male pilots (KMP) and 58 KAF female pilots and cadets (KFP) using an anthropometer and a three-dimensional scanner. The KMP face measurement...

A new methodology is proposed to estimate changes in the Earth's dynamic oblateness ([Formula: see text] or equivalently, [Formula: see text]) on a monthly basis. The algorithm uses monthly Gravity Recovery and Climate Experiment (GRACE) gravity solutions, an ocean bottom pressure model and a glacial isostatic adjustment (GIA) model. The resulting time series agree remarkably well with a soluti...

Pulmonary edema is a significant complication of a number of disease and conditions. Its main manifestation is the leakage of fluid from the pulmonary capillaries into the cavity of the alveoli through the alveolar-capillary membrane. This leads to a number of severe clinical manifestations and requires immediate treatment. The underlying mechanisms causing this complication include cardiogenic...

Abstract In oilfield, scaling caused by water injection is becoming increasingly serious blocking the gathering and transmission pipelines of oilfield resulting in a decline production great loss production. Oil gas leakage pipeline scaling, corrosion perforation has irreversible damage to surrounding environment. this paper, citric acid sodium pyrophosphate are used as main agents, hydrolytic ...

Radiation detectors need front-end electronics capable of measuring currents over a large dynamic range with femtoampere sensitivity. The goal this work is to find an alternative the legacy systems implemented using discrete components or technology nodes 350 nm higher. 130 evaluated on its leakage current performance assess employability in such applications. A comparative analysis three low m...

Well-leakage is a very difficult problem in the process of drilling at home and abroad. At present, it mainly relies on cumulative effect plugging slurry to implement regardless number times costs. Commonly used technology are guarantee success rate scientific malignant leakage, which has an extremely bad impact development petroleum industry. In this study, With polyvinyl alcohol acrylic acid ...

A new approach is adopted in this paper for modeling the transient magnetic field, radiated by buried grid under lightning strokes. This approach summarizes each of three methods: analytical formula, based on electrical dipole theory for determining radiated magnetic field in infinite conductive medium, modified images theory for taking into account the interface in the half space, and transmis...

An important practical problem in the area of the higher-order statistical signal processing is to estimate the cumulants and polyspectra of the analyzed signal when a finite sequence of time samples is available. We cannot use the theoretical formula because they are based on the assumption that an infinite sequence of time samples is available, but this is not true in practice. In order to ob...

We construct a simple public-key encryption scheme that supports polynomially many additions and one multiplication, similar to the cryptosystem of Boneh, Goh, and Nissim (BGN). Security is based on the hardness of the learning with errors (LWE) problem, which is known to be as hard as certain worst-case lattice problems. Some features of our cryptosystem include support for large message space...

introduction: there are several methods for evaluating microleakage in dentistry, for example dye or bacterial leakage, electro-chemical methods, radioisotope labeling and fluid filtration. the purpose of this study was to assemble the fluid filtration system for quantitative evaluation of microleakage in dental materials. materials and methods: the roots were connected to a tube filled with an...