Engineering involves the design and assemblage of elements that work in specific ways to achieve a predictable purpose and function. In systems design, engineering takes a conceptual “top-down” approach to problem solving that aims to decompose a complicated problem into separable and more manageable sub-problems. While this strategy has been successful in designing systems that deftly operate ...

An examination of rural policy requires an understanding of the unique conditions in rural places that justify separate national policies. The great differences among rural people and places in America make it hard to fashion national policies that fit all of these places. The analytical problem also is complicated by this diversity as well as the absence of a common statistical definition of r...

Exact non-reflecting boundary conditions for a linear incompletely parabolic system in one dimension have been studied. The system is a model for the linearized compressible Navier-Stokes equations, but is less complicated which allows for a detailed analysis without approximations. It is shown that well-posedness is a fundamental property of the exact non-reflecting boundary conditions. By usi...

Most failures develop as a result of lack resistivity information at the internal structure level during typical loading situations such shock load and impact load. Impact loads have significant on component’s structural performance. A careful, organized examination settings their side effects can reveal how well something withstand peak loads. First, this study investigated analyses nine varie...

OBJECTIVE This study compared outcomes between thoracic endovascular aortic repair and conventional open surgical and medical therapies for acute complicated type B aortic dissection. METHODS From 2002 to 2010, a total of 170 patients with type B aortic dissections were retrospectively identified from the University of Pennsylvania aortic database. Of these 170 patients, 147 had acute type B ...

In the absence of adequate preventive measures the manufacture of carbon electrodes is attended by a considerable dust hazard. The present paper is based on a study of the clinical, radiological, and pathological changes resulting from inhalation of this dust, which is derived from crushed coke and anthracite. An account is given of the findings in a clinical survey of 15 men who had been emplo...

introduction antiphospholipid syndrome (aps) associated with intra-cardiac thrombus and pulmonary embolism is infrequent. however, the presence of pleural effusion is extremely rare. case presentation a 42-year-old woman, admitted with palpitation, dyspnea and history of stroke and thrombocytopenia is described. doppler sonography revealed deep vein thrombosis. moreover, subsequent investigatio...

in this paper, two new quadrilateral elements are formulated to solve plane problems. low sensitivity to geometric distortion, no parasitic shear error, rotational invariance, and satisfying the felippa pure bending test are characteristics of these suggested elements. one proposed element is formulated by establishing equilibrium equations for the second-order strain field. the other suggested...