نتایج جستجو برای: soil arching
تعداد نتایج: 181247 فیلتر نتایج به سال:
نفت استخراج شده در اکثر میادین نفتی حاوی مقادیری آب به شکل امولسیون می باشد که انواعی از نمک ها به صورت نامحلول، در قطرات آب پراکنده شده در نفت وجود دارند. این امولسیون ها، به دلیل حمل آب اضافی و بالاتر بودن ویسکوزیته، باعث افزایش هزینه های حمل و نقل و پمپ کردن می شوند. همچنین نمک های حل شده در قطرات آب باعث افزایش مشکلات خوردگی تجهیزات و غیر فعال شدن کاتالیست ها می گردد. بنابراین شکستن امولسی...
Electronic voting systems are being introduced, and have been introduced, in many countries for a variety of reasons. The introduction of computers into the electoral process can offer several advantages. Among other things it can speed up the process of calculating results, can help voters avoid accidentally spoiling their vote, and can allow voters with special needs to vote in private. Often...
A head-mounted display provides continuous real-time imaging within the practitioner's visual field. We evaluated the feasibility of using head-mounted display technology to improve ergonomics in ultrasound-guided regional anesthesia in a simulated environment. Two anesthesiologists performed an equal number of ultrasound-guided popliteal-sciatic nerve blocks using the head-mounted display on a...
As demonstrated by the two preceding papers (Bedrosian, 1995; Higginbotham, 1995), the appropriate selection of subjects for conducting augmentative and alternative communication (AAC) research can be complex and, in many cases, unresolved. Our intention in presenting opposing views on the use of nondisabled individuals for AAC research was to highlight issues pertinent to subject selection. As...
Numerical investigation of gravity flow of granular solids in a hopper through orifices of different shapes has been conducted using the discrete element method. The simulations are validated by comparing with the experimental results for rapeseed cases. It is observed that with orifices of the same area the flow rate decreases in the order of circle, square, rectangle and triangle, which is si...
The opportunity to enhance the reputation of local government is an emerging philosophy, primarily driven by the current egovernment agenda, to transform governments into efficient, effective, customer-centric and innovative organisations. It can be argued that those authorities that successfully embed this change will attract new business and employment, increase loyalty, pull in more tax reve...
T T T T T T T T T T T T T T T Abstract In this paper we continue an earlier study of ends non-compact manifolds. The over-arching goal is to investigate and obtain generalizations of Siebenmann's famous collaring theorem that may be applied to manifolds having non-stable fundamental group systems at infinity. In this paper we show that, for mani-folds with compact boundary, the condition of inw...
The Intelligent Street is a music installation that is able to respond intelligently to the collective requests of users interacting together. The performance it creates is largely influenced by the collective set of text commands from users’ mobile phones. In this way, users in shared environments, subjugated for so long to uncontrollable and often undesired ‘Muzak’, can now directly influence...
In the United Kingdom the Environment Agency of England and Wales have developed a number of initiatives to assist in implementing the Water Framework Directive (2000/60/EC) including Catchment Management Strategies (CAMSs) and the Resource Assessment Management (RAM) Framework. These processes include setting river flow objectives and establishing best practice for the assessment of water reso...
No completely reliable echocardiographic technique has been described for the separate identification of the aorta and main pulmonary artery in complete transposition of the great arteries. A mechanical wide-angle (60 degrees) sector scanner has been applied to this problem in 17 infants and young children, including 8 newborns before angiocardiography. In all patients a longitudinal scan (sagg...
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