The aim of this research is to predict league rankings through various machine learning models using technical and physical parameters. This study followed a longitudinal observational analytical design. The SENTIO Sports optical tracking system was used to measure the physical demands and technical practices of the players in all matches. Then, the data regarding the last three seasons of the Turkish Super League (2015-2016, 2016-2017, and 2017-2018), was collected. In this research, league rankings were estimated using three machine learning methods: Artificial Neural Networks (ANN), Radial ...Daha fazlası
Laminated glass is made by combining glass layers with polyvinyl butyral (PVB) or a different adhesive with the help of heat and pressure. Its popularity is increasing in the building industry as a protective material. However, despite the popularity of laminated glass as a structural material, delamination is recognized as a highly undesirable problem inducing major damage to laminated glass. The effect of boundary conditions on the delamination strength of laminated glass is observed in this study. It is concluded that the location and size of delamination have a considerable effect in deter ...Daha fazlası
The luminescence of Er3 ions in silica glasses synthesized by the direct sol–gel–glass transition method and by melting of activated gel grit using various precursors of optical centers was studied. The formation of complex centers including erbium, aluminum, and alkali metal ions was found to be one way of essentially increasing the half-width of the 4 I 13/2 → 4 I 15/2 luminescence band of these ions.
Keyword: complex optical centers; luminescence; rare earth ions; sol–gel method
The delamination phenomena of laminated glass structures are issues that are not perfectly understood and remain problematic to predict due to the nonlinearity of the geometric response. A research study is undertaken to investigate the behavior of laminated glass curved beams with initial delamination exposed to different boundary conditions. A mathematical model which contains nonlinear field equations and boundary conditions is developed. An iterative procedure for the solution of field equations is implemented. In addition, experiments are conducted and finite element model is developed to ...Daha fazlası
Исследована люминесценция ионов Er3 в кварцевых стеклах, синтезированных методом прямого перехода золь-гель-стекло и плавлением активированной гель-крупки с использованием различных прекурсоров оптических центров. Установлено, что одним из путей существенного увеличения полуширины полосы люминесценции 4I13/2→4I15/2 указанных ионов является формирование сложных оптических центров, включающих в себя ионы эрбия, алюминия и щелочного металла.
Ключевые слова: золь-гель метод, редкоземельный ион, люминесценция, сложные оптические центры
Laminated glass is produced by laminating glass layers with an interlayer at specified pressure and temperatures using an autoclave. The characteristic properties of laminated glass can be affected considerably by the used interlayers. Polyvinyl Butyral, Ethyl Vinyl Acetate and SentryGlass are three common interlayers used by glass manufacturers. In order to select the appropriate interlayer parameters such as blast performance, availability, cost, durability, optical property and manufacturing equipment should be considered. Usage of laminated glass is expanding due to its safety and security ...Daha fazlası
The aim of this study is to search some mechanical features of polypropylene fibre mixed adobe. As fibre additive polypropylene, in proportions of 0%, 5%, 10%, 15%, soil with 26% clay and 7 kg straw per cubic meter were mixed and mixture with adobe was prepared. As a result the compressive strengths of the polypropylene fibre mixed samples were determined as 40 kgf/cýrf in %0, 26.55 kgf/cm in 5%, 31.62 kgf/cm2 in 10%,37.35 kgf/cm2 in 15%; tensile strengths as 13.76 kgf/cm2 in 0%, 45.80 kgf/cm2 in 5%, 46.90 kgf/cm2 in 10%, 47.20 kgf/cm2 in 15%; heat conduction values as 0.58 kcal/mh°c in 0%, 0. ...Daha fazlası
In this study, usability and resistance of silica fume in the manufacture of adobe by mixing silica fume in certain proportions with the material used in the manufacture of adobe was investigated. For this purpose, a certain amount of cement with no or some silica fume content was added to adobe. Three bricks were prepared with each of the cement added mixtures containing 0, 5, 10, and 15% (wsilica fume/wcement) silica fume. The prepared samples were tested to determine compressive strength, water resistance, and wind resistance. For the wind resistance tests, the bricks were painted with eith ...Daha fazlası
In this study, it was tried to obtain bearing concrete by using the pumice and perlite aggregates in certain proportions. Different cement dosages were used in every mixture poured with portland cement and portland composite cement, the 60% pumice and 40% perlite aggregates of which were kept stable. The silica fume was added as much as 10% of cement amount in mixture. Mixtures from 200 to 500 doses were made and poured with every type of cement. The prepared samples left to water cure and their 7 and 28 days compressive strengths were determined. The test results indicated that the mixtures p ...Daha fazlası
As the urban population increases and the level of social life advances, the amount of wastewater originating from houses, institutions and industries increases as well. It is necessary for the infrastructure systems in settlements to be sustained under healthy conditions. Since the subsequent repair of infrastructure systems is difficult, appropriate selection of the materials used in these systems is of importance. Concrete pipes are widely used in sewerage systems. In the present study, it was aimed to improve the biological corrosion resistance of concrete pipes via coating with various ma ...Daha fazlası
Animal fats are one of the biodiesel raw materials. In this study, biodiesel was produced from horse fat by transesterification method and the produced biodiesel was mixed with euro diesel at 5 by volume, and experimental fuels in the form of D-100 and D95B5 were obtained. Fuel properties of test fuels were determined. In addition, using the experimental fuels in a single-cylinder, four-stroke, water-cooled diesel engine, the data obtained by investigating the engine performances, energy analysis, and noise emissions were presented with graphics and interpreted. In the experiment results; D95B ...Daha fazlası