Bitlis Eren Üniversitesi Fen Bilimleri Dergisi最新文献

Upper and lower extremity bone segmentation with Mask R-CNN 利用掩模 R-CNN 进行上下肢骨骼分割

Bitlis Eren Üniversitesi Fen Bilimleri Dergisi Pub Date : 2024-03-15 DOI: 10.17798/bitlisfen.1413650

Ayhan Aydin, Caner Özcan

引用次数: 0

Evaluation the Shielding Properties of Various Water Equivalent Materials Using Different Calculation Methods and Monte Carlo 使用不同的计算方法和蒙特卡罗评估各种水当量材料的屏蔽性能

Bitlis Eren Üniversitesi Fen Bilimleri Dergisi Pub Date : 2024-03-12 DOI: 10.17798/bitlisfen.1331265

T. Sahmaran

引用次数: 0

Properties of Basalt Fiber-reinforced Lightweight Geopolymer Mortars Produced with Expanded Glass Aggregate 使用膨胀玻璃骨料生产的玄武岩纤维增强轻质土工聚合物砂浆的性能

Bitlis Eren Üniversitesi Fen Bilimleri Dergisi Pub Date : 2024-03-11 DOI: 10.17798/bitlisfen.1379342

A. Gültekin

{"title":"Properties of Basalt Fiber-reinforced Lightweight Geopolymer Mortars Produced with Expanded Glass Aggregate","authors":"A. Gültekin","doi":"10.17798/bitlisfen.1379342","DOIUrl":"https://doi.org/10.17798/bitlisfen.1379342","url":null,"abstract":"Geopolymers are new-generation construction materials that have attracted attention recently and can be an alternative to cement. In the production of these materials, aluminosilicate powder materials are used together with alkali or acid solutions. Geopolymers have different types of superiorities, such as rapid strength gain, high mechanical properties and good durability. This experimental study investigated the properties of expanded glass aggregate-bearing Class F fly ash-based lightweight geopolymer mortars. The fresh unit weight, water absorption capacity, compressive strength and high-temperature resistance (upon exposure to 900°C) of the mortars were determined. In addition, basalt fiber addition's effects on these properties were investigated. The inclusion ratios of basalt fiber were 0.1%, 0.2% and 0.4% by volume. The compressive strengths of fiber-free lightweight mixture and mixtures, including 0.1%, 0.2% and 0.4% basalt fiber, were found to be 8.2, 8.9, 9.0 and 8.0 MPa, respectively. The compressive strength of all lightweight mortars increased between 61.3% and 76.4% after the high-temperature effect. The results proved that it is possible to produce expanded glass aggregate-bearing lightweight geopolymer mortars with acceptable mechanical properties.","PeriodicalId":209817,"journal":{"name":"Bitlis Eren Üniversitesi Fen Bilimleri Dergisi","volume":"135 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140251601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Symbolic Aggregate Approximation-Based Clustering of Monthly Natural Gas Consumption 基于符号聚合近似的天然气月消费量聚类方法

Bitlis Eren Üniversitesi Fen Bilimleri Dergisi Pub Date : 2024-03-08 DOI: 10.17798/bitlisfen.1395411

Mehmet Eren Nali̇ci̇, İsmet Soylemez, Ramazan Ünlü

{"title":"Symbolic Aggregate Approximation-Based Clustering of Monthly Natural Gas Consumption","authors":"Mehmet Eren Nali̇ci̇, İsmet Soylemez, Ramazan Ünlü","doi":"10.17798/bitlisfen.1395411","DOIUrl":"https://doi.org/10.17798/bitlisfen.1395411","url":null,"abstract":"Natural gas is an indispensable non-renewable energy source for many countries. It is used in many different areas such as heating and kitchen appliances in homes, and heat treatment and electricity generation in industry. Natural gas is an essential component of the transportation sector, providing a cleaner alternative to traditional fuels in vehicles and fleets. Moreover, natural gas plays a vital role in boosting energy efficiency through the development of combined heat and power systems. These systems produce electricity and useful heat concurrently. As nations move towards more sustainable energy solutions, natural gas has gained prominence as a transitional fuel. This is due to its lower carbon emissions when compared to coal and oil, thus making it an essential component of the global energy framework. In this study, monthly natural gas consumption data of 28 different European countries between 2014 and 2022 are used. Symbolic Aggregate Approximation method is used to analyse the data. Analyses are made with different numbers of segments and numbers of alphabet sizes, and alphabet vectors of each country are created. These letter vectors are used in hierarchical clustering and dendrogram graphs are created. Furthermore, the elbow method is used to determine the appropriate number of clusters. Clusters of countries are created according to the determined number of clusters. In addition, it is interpreted according to the consumption trends of the countries in the determined clusters.","PeriodicalId":209817,"journal":{"name":"Bitlis Eren Üniversitesi Fen Bilimleri Dergisi","volume":"36 19","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140257375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design and Implementation of an Optimized PID Controller for Two-Limb Robot Arm Control 设计和实现用于双肢机器人手臂控制的优化 PID 控制器

Bitlis Eren Üniversitesi Fen Bilimleri Dergisi Pub Date : 2024-03-08 DOI: 10.17798/bitlisfen.1370223

Said Müftü, Barış Gökçe

{"title":"Design and Implementation of an Optimized PID Controller for Two-Limb Robot Arm Control","authors":"Said Müftü, Barış Gökçe","doi":"10.17798/bitlisfen.1370223","DOIUrl":"https://doi.org/10.17798/bitlisfen.1370223","url":null,"abstract":"With developing technology, robot arms are used in more areas, and this is directly proportional to the work done for its development. Studies on robot arms are generally focused on control. The controllability of robot arms generally provides speed and precision. \u0000Within the scope of this study, the control optimization of a two-arm robot arm with an optimized proportional integral differential controller (PID) was carried out using a microcontroller. The kinematic operations required to control a two-arm robot arm have been developed by the MATLAB Support Package for Arduino Hardware. The transfer function required for the control system was used for a direct current (DC) brushed motor, using the values given in the motor data sheet. Feedback is provided for the control system thanks to the Hall effect encoder. \u0000The gripper end of the two-limbed robot arm follows the specified square-shaped reference. In this study, where PID controller was used, controller parameters were obtained with particle swarm, artificial bee colony and chaos game metaheuristic optimization algorithms for square orbit and these parameters were used on the produced robot arm. \u0000Many methods have been used in the literature to determine PID parameters. In this study, the chaos game metaheuristic optimization algorithm, which has become popular in recent years, was used to determine the parameters of the PID controller.","PeriodicalId":209817,"journal":{"name":"Bitlis Eren Üniversitesi Fen Bilimleri Dergisi","volume":"108 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140256925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Determination of Some Atomic Parameters for Aktaş, Çıldır Lake, and Kura River Water with the Help of WinXCom 在 WinXCom 的帮助下测定阿克塔什、哲尔湖和库拉河水的一些原子参数

Bitlis Eren Üniversitesi Fen Bilimleri Dergisi Pub Date : 2024-03-08 DOI: 10.17798/bitlisfen.1367911

Burcu Akça, Rumeysa Günay Ağaoğlu

引用次数: 0

Gamma-Ray Shielding Capacity of Bi2O3-SiO2-B2O3 Glass Powders with Different Bi2O3 Contents 不同 Bi2O3 含量的 Bi2O3-SiO2-B2O3 玻璃粉的伽马射线屏蔽能力

Bitlis Eren Üniversitesi Fen Bilimleri Dergisi Pub Date : 2024-03-04 DOI: 10.17798/bitlisfen.1408329

Aycan Şengül, I. Akkurt

引用次数: 0

Work Accidents: A Bibliometric Analysis of International Literature and the Situation in Turkey 工伤事故：对国际文献和土耳其情况的文献计量分析

Bitlis Eren Üniversitesi Fen Bilimleri Dergisi Pub Date : 2023-12-19 DOI: 10.17798/bitlisfen.1335217

Ali Ağar

{"title":"Work Accidents: A Bibliometric Analysis of International Literature and the Situation in Turkey","authors":"Ali Ağar","doi":"10.17798/bitlisfen.1335217","DOIUrl":"https://doi.org/10.17798/bitlisfen.1335217","url":null,"abstract":"With scientific and technological developments, people's welfare levels have increased. However, occupational accidents still continue to be an important problem in workplaces around the world. The aim of this study is to examine the necessary articles about the active journals, the most publishing countries, the most used keywords and research areas in the international and Turkish literature on occupational accidents. In this study, bibliometric analysis techniques were used to realize the purpose of the research and to find answers to the research questions. Research data were obtained from the Web of Science (WoS) database in June 2023. VOSviewer and Excel software program were used in the analysis of the data. While the highest number of publications on work accidents in the world was made in 2020, it was made in 2019 in Turkey. While the most publications were made in the field of public, environmental and occupational health as a research subject in the world, the most publications were made in the field of emergency medicine in our country. While Brazil is the most broadcasting country in the world, Turkey ranks third. It has been determined that the most widely published magazine in the world is Safety Science magazine and the most frequently used keyword is work accident. In addition, it has been determined that most of the publications addressing Türkiye were made in Istanbul University. As a result, it is seen that the studies carried out on occupational accidents in the world and in Turkey are not sufficient. In order to increase the productivity of the workplaces and the efficiency of the employees, the prevention of work accidents and increasing the number of researches in this field should be the first priority.","PeriodicalId":209817,"journal":{"name":"Bitlis Eren Üniversitesi Fen Bilimleri Dergisi","volume":"35 16","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139171171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Effect of Conductivity on Surface Leakage Currents on Iced-Covered Insulators 电导率对冰封绝缘体表面泄漏电流的影响

Bitlis Eren Üniversitesi Fen Bilimleri Dergisi Pub Date : 2023-12-18 DOI: 10.17798/bitlisfen.1299867

Muhammed Buğracan Özküçük, M. Gençoglu

{"title":"The Effect of Conductivity on Surface Leakage Currents on Iced-Covered Insulators","authors":"Muhammed Buğracan Özküçük, M. Gençoglu","doi":"10.17798/bitlisfen.1299867","DOIUrl":"https://doi.org/10.17798/bitlisfen.1299867","url":null,"abstract":"Insulators on power transmission systems today are vital to ensuring the reliable and effective operation of high-voltage lines. However, it is inevitable that insulators will encounter problems such as contamination and icing due to natural environmental conditions and environmental factors. Pollution layers and ice buildup that have developed on insulator surfaces have a detrimental impact on insulation performance, increase surface leakage currents, and result in power line failures or interruptions. This article focuses on understanding the phenomena of contamination and icing in insulators, evaluating their effects, and investigating methods that can be taken to prevent or reduce these problems. For this purpose, solutions with different conductivity values were sprayed on the insulators in the laboratory environment, and ice covering the insulator surface was provided. Leakage currents were investigated by applying an alternating voltage with mains frequency to the insulators. Data were obtained with the help of the LabVIEW program, and the relationship of leakage currents of porcelain, glass, and silicone insulators with conductivity was compared.","PeriodicalId":209817,"journal":{"name":"Bitlis Eren Üniversitesi Fen Bilimleri Dergisi","volume":"72 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139173773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design, Finite Element Analysis and Optimization of Helical Angular Pressing (HAP) Method as a Novel SPD Technique 作为一种新型 SPD 技术的螺旋角冲压 (HAP) 方法的设计、有限元分析和优化

Bitlis Eren Üniversitesi Fen Bilimleri Dergisi Pub Date : 2023-12-15 DOI: 10.17798/bitlisfen.1295905

Ömer Karabey

{"title":"Design, Finite Element Analysis and Optimization of Helical Angular Pressing (HAP) Method as a Novel SPD Technique","authors":"Ömer Karabey","doi":"10.17798/bitlisfen.1295905","DOIUrl":"https://doi.org/10.17798/bitlisfen.1295905","url":null,"abstract":"Severe Plastic Deformation (SPD) processes improve the mechanical properties of materials by obtaining Ultra Fine Grained (UFG) materials, orienting the grains and reforming the grains. Helical Angular Pressing (HAP) is a newly proposed Severe Plastic Deformation (SPD) method. In order to improve the efficiency of the HAP method, its die geometry should be optimized first. In this context, four parameters (helical diameter, helical pitch, helical height and channel radius) were determined for the die channel geometry, each with four levels according to the literature. Then, thanks to Taguchi L16 combinations, 16 Finite Element Analyses (FEA) were carried out using Deform 3D software instead of 256 simulations, and effective strain values and maximum pressing load values were obtained. Later on, using the SPSS 16 software, Taguchi optimization was carried out to obtain the optimum HAP die channel geometries by minimizing the press load and maximizing the effective strain values. Next, the Finite Element Analysis (FEA) was repeated with these determined optimum die channel parameters. Finally, the efficiency of this novel HAP method was compared with conventional Equal Channel Angular Pressing (ECAP) and Twist Extrusion (TE) methods. As a result, HAP method provides effective strain values equivalent to 10 number of passes after processing with ECAP. And it is approximately 4 times higher than that achieved by TE processing. As a result of the Taguchi optimization, it is concluded that the values in the combination of diameter (d)=60 mm, height (h)=50 mm, radius (r)=4 and pitch (p)=1.25 are the optimum die geometry. In conclusion, these results indicate that the proposed novel HAP method is an efficient and applicable SPD technique.","PeriodicalId":209817,"journal":{"name":"Bitlis Eren Üniversitesi Fen Bilimleri Dergisi","volume":"147 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139177870","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0