WEIR COEFFICIENT FOR CYLINDRICAL WEIRS

In this study, the weir coefficient for cylindrical weirs was experimentally investigated. Experiments were conducted for both free and submerged overflow conditions. Experimental results have indicated that the weir coefficient is about 3.50-3.80 for the free overflow condition. The weir coefficient for the submerged overflow condition varies with the amount of submergence

A DIGITAL IMAGE ANALYSIS BASEDSURFACE POLISH MEASUREMENT SYSTEM

Because marble and natural rocks have been used widely for ornamental purposes, rubbing-polishing process also became important. One of the factors determining the quality of natural rocks is surface polish. The degree of surface polish is determined by qualitative definitions based on experiences in the plants natural rocks are processed. In this study, a digital image analysis based surface polish measurement system which measures surface polish systematically was developed and its validity and suitability were investigated by making experiments on a natural rock sample

Investigating buckling load of orthotropic plates with a circular cut-out

Bu çalışmada, bir doğrultulu statik düzlemsel yükler etkisindeki, basit mesnetli, tabakalı, dairesel delikli, ortotropik dikdörtgen plakların burkulma analizi sonlu elemanlar yöntemi kullanılarak yapılmıştır. Ortotropik plaklarda çeşitli geometrik deliklerin bulunması halinde elemanın taşıyabileceği burkulma yükünün incelenmesi oldukça önemlidir. Bu nedenle, bu çalışmada altı tabakalı, merkezi dairesel delikli ve tabakaları uygulanan yüke 0° ve 90°’lik açılarla yerleştirilmiş plaklar dikkate alınmıştır. Plak merkezine yerleştirilmiş daire şeklindeki deliğin yarıçapının değişmesi durumunda kritik burkulma yüklerinin değişimi araştırılmıştır. Ayrıca kritik burkulma yükü değişimleri için regresyon analizi yapılmıştır.In this study, buckling analysis of simply supported, laminated and orthotropic rectangular plates with circular cut-out subjected to uniaxial static in-plane loads are performed by using finite element method. It is important to investigate buckling load, which plate will bear, on orthotropic plates while those have various geometrically cut-outs. So, six laminates, central circular cut-out and cross-ply plates are taken into consideration. It is studied that when radius of central circular cut-out of plate increases, how the critical buckling load changes. Besides, a regression analysis is performed for the buckling loads

Use of interactive multisensor snow and ice mapping system snow cover maps (IMS) and artificial neural networks for simulating river discharges in Eastern Turkey

Basins located in Eastern Turkey are largely fed by snowmelt runoff during spring and early summer seasons. This study investigates the efficiency of artificial neural networks (ANNs) in snowmelt runoff generation. Although ANNs have been used for streamflow simulating/forecasting in the last two decades, using satellite-based snow-covered area (SCA) maps and meteorological observations as inputs to ANN provides a novel basis for estimating streamflow. The proposed methodology is implemented over Upper Euphrates River Basin in Eastern Turkey. SCA data was acquired from Interactive Multisensor Snow and Ice Mapping System (IMS) for an 8-year period from February 2004 to September 2011. Meteorological observations including daily cumulative precipitation and daily average air temperatures were obtained from Turkish State Meteorological Services. The simulation results are promising with coefficient of correlation varying from 0.67 to 0.98 among proposed models. Past days discharge was found to substantially improve the forecast accuracy. The paper presents the expected basin discharge for 2011 water year based on meteorological observations and SCA input