This study investigates experimentally and numerically the effects of sills with different geometric specifications at various positions on hydraulic characteristics flow through sluice gates. The simulation results showed that RNG turbulence model’s statistical indicators yield high accuracy compared to k-?, k-?, LES models. discharge coefficient (Cd) has an inverse relationship gate opening. ...

Although many different tools are already available which lessen the burden of spam, it sill remains a severe problem. A very promising solution for preventing outgoing spam starts at a different point. Spammers should be driven out of business by creating cost high enough to make their work unprofitable. In this report we try to show under which circumstances this goal can be reached and we pr...

[1] We use satellite imagery and numerical modeling to investigate the characteristics of Lombok Strait nonlinear internal waves in relation to the dominant monsoon seasonality. Two basic wave types are identified, the first of which represents the well‐known arc‐like internal wave (AIW) that radiates uniformly away from its generation region near the sill in regular sequences of ranked soliton...

The role of a Southern Ocean gateway in permitting multiple equilibria of the global ocean thermohaline circulation is examined. In particular, necessary conditions for the existence of multiple equilibria are studied with a coupled climate model, wherein stable solutions are obtained for a range of bathymetries with varying Drake Passage (DP) depths. No transitions to a Northern Hemisphere (NH...

Two widely used methods of semivariogram estimation are weighted least squares estimation and maximum likelihood estimation. The former have certain computational advantages, whereas the latter are more statistically efficient. We introduce and study a “hybrid” semivariogram estimation procedure that combines weighted least squares estimation of the range parameter with maximum likelihood estim...

In this study, experimental procedure and laboratory works have been conducted to investigate the energy loss rate on stepped spillway, using inclined steps together with end sill. To have a more elucidated investigation inclined steps with different slopes (Horizontal , 7, 10, and 12 degrees with respect to the horizon) and end sill with different thicknesses (5 and 10 mm) and heights (6, 8, 1...

هدف: پیشرفت جوامع بالاخص کشورهای درحال توسعه تا حد زیادی در گرو گسترش نهادهای دانشگاهی است. هم‌چنین یکی از مهم‌ترین ویژگی‌های آموزشی، درهم‌تنیدگی ساختارهای آموزش و اشتغال واقع هر آموزشی باید بازدهی یا توجیه اقتصادی داشته باشد که عالی‌ترین نوع آن ایجاد متناسب با فراگیر بر این اساس پژوهش حاضر به بررسی وضعیت راهیابی دانشجویان فارغ‌التحصیلان کارشناسی ارشد دکتری رشته تکنولوژی بازار کار عوامل مؤثر نظ...