SDG 9 · Sanayi, Yenilikçilik ve Altyapı · SDG · Erzincan Binali Yıldırım Üniversitesi

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ArticleAçık Erişim2021/r/ebyu/14353
Effect of polypropylene fibers on the development lengths of reinforcement bars of slabs
Kumbasaroglu, Atila; Yalciner, Kürşad; Yalciner, Hakan; Turan, Ahmet I.; Celik, Alper
Ductile behavior is one of the most important earthquake indicators that must be possessed by structures. Because of the limited tensile strength of concrete, alternative materials such as structural nanosynthetic fibers as three-dimensional reinforcement bars have gained increasing popularity over several decades. However, the contribution of fibers to the development length of reinforcement bars has not been investigated. Therefore, an experimental study was conducted to investigate the effects of polypropylene fibers on the development lengths of reinforcement bars. Thirty-three reinforced concrete (RC) slabs at three different volume fractions of fibers of 0.0, 1.0 and 1.5 % at different embedment lengths of reinforcement bars were investigated under four-point flexural strength tests. Load-displacement curves, energy absorption capacities, ductility ratios and bond-slip relationships were obtained for different embedment lengths of reinforcement bars with three different amounts of fibers in RC concrete slabs. The test results revealed that the predominant effects of fibers on structural behavior pertained to the energy absorption capacities at plastic deformation. It was found that resisting more strains by reinforcement bars with the help of added polypropylene fibers resulted in the regaining of ductile behavior due to the reduced embedment lengths of the reinforcement bars.
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ArticleYalnız künye2021/r/ebyu/14341
Corridor capacity analysis with mesoscopic simulation: Erzincan province sample
Demİrİz, Ahmet Oğuz; Bayrak, Osman Ünsal; Bayata, Halİm Ferİt
Today, the existing traffic networks cannot cope-up with the increasing transportation demands and traffic volume and fail to meet the demands. This causes economic and social losses. Increasing transportation demands and traffic volume in Erzincan city center of Turkey cause the main arteries and junctions to be insufficient. In such problems, solutions are generally produced using parameters such as trip and delay durations and exhaust emissions. Another point to be considered is to ensure the improved intersections to work as a whole. In this study, the main arteries and the junctions on these in Erzincan city center were discussed. In this context, totally 14 intersections were tried to be improved. Suggestions were offered regarding delay time, travel time, queue lengths, NOx and CO2 emissions, and average speed values as the design criteria. Simulations were made in AIMSUN program for the current situation and four different scenarios. Analytical Hierarchy Process (AHP), which is one of the multi-criteria decision-making methods for the network was employed to determine which scenario was more appropriate. At the end of the study, decrease of up to 23% for travel time, 47% for delays, 48% for queue lengths, 11% for NOx, and 13% for CO2 and increase of up to 30% in average speed were obtained. According to AHP, Scenario 4 had the highest priority value among all alternatives. Moreover, the reliability of the results was ensured by supporting the mesoscopic simulation with AHP which is a multi-criteria decision-making method.
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ArticleYalnız künye2021/r/ebyu/14254
Experimental investigation on the applicability of geogrid: A comparison between conventional and hybrid-reinforced irregular reinforced concrete members
Özkal, Fatih Mehmet
Since geogrid is a new and under-researched material in terms of reinforced concrete members, this study focuses on the experimental validation of the feasibility of this material to be used instead of steel rebars. Despite the apparent mechanical disadvantages of geogrid, higher durability and special applicability in harsh environments are significant advantages of the material. A total of 18 deep beams as nine unique models with various web-openings have been tested in this study. Each one of the conjugate test samples was designed conventionally by steel reinforcements, while the other one was designed by hybridizing geogrid and steel as the web reinforcement. Comparison of the structural performance and applicability of geogrid, which is used as the web reinforcement instead of steel, in terms of the flexural and mostly the shear strength of concrete members, is the main goal of the research. Because of the complexity depending on their geometrical irregularities, deep beams with web-openings were experimentally investigated for the validation of the feasible use of geogrid material. Experimental comparison of the deep beams, which have been subjected to flexural testing, revealed that geogrid has a remarkable contribution to the structural performance of reinforced concrete members. Alongside the advantage of geogrid’s structural flexibility and especially the bonding performance, higher ductility and stiffness levels of hybrid beams highlight the eligibility of geogrid to be used instead of steel rebars in reinforced concrete structures.
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ArticleYalnız künye2021/r/ebyu/14237
Architecture design and performance analysis of a hybrid hydrogen fuel cell system for unmanned aerial vehicle
Ozbek, Emre; Yalin, Gorkem; Karaoglan, Mustafa Umut; Ekici, Selcuk; Colpan, C. Ozgur; Karakoc, T. Hikmet
The flight endurance of UAV systems is an important issue that restricts the operational capabilities. Thus, different energy systems and alternative onboard energy generation systems have been tested for the UAVs. Within these systems, fuel cells provide high energy density that can increase flight endurance greatly. In this study, a PEM fuel cell – Li-Po battery hybrid system has been developed by evaluating three architecture models. In the guide of the experimental power demand data of a fixed-wing UAV, modeling and testing procedures were performed. Battery voltage and fuel cell current variations observed during the ground tests were evaluated. It has been observed that approximately 160–170 W of the 250 W power is met by the fuel cell since no preconditioning has been applied and the temperature values at which the fuel cell exhibits its optimum performance. In the case where the fuel cell could provide 7.8 An under conditions where the humidification effects were not included in the model, the required current was over 7.8 A between approximately 400-1200 s. The fuel cell and battery behavior in response to the sudden power changes and to the uncertainties corresponding to the changes in the motor power during the flight are also detailed.
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ArticleYalnız künye2021/r/ebyu/14219
Homogenized pouch cell material modelling and a comparison study
Orhan, Osman; Özel, Adnan
Simulation of the mechanical response of lithium-ion battery cells is preferably over experimental due to the explosive nature of them. There are several mechanical modelling methods for representing pouch cells; this study introduces a modified homogenized model. The model uses mechanical responses of layers from literature to establish an average behavior of a pouch cell. Data is normalized, then unified tension and compression stress-strain curves are gathered. These properties are used to build a homogenized pouch cell model by using a tension and compression plasticity model. A stress state dependent failure model (GISSMO) is utilized to demonstrate the damage of cell. Finally, experimental studies from literature are employed for validation. As a result, the model simulates peak forces of all experimental studies with a very low deviation. Homogenizing pouch cell with the proposed approach eliminates modeling detail without compromising the overall mechanical response of the cell. The model is seen to be suitable for applications that do not require a precise mechanical response, such as a battery module or pack analysis.
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ArticleYalnız künye2021/r/ebyu/14160
Zero-voltage switching half-bridge pulse width modulation DC–DC converter with switched capacitor active snubber cell for renewable energy applications
Bodur, Haci; Yesilyurt, Huseyin; Ting, Naim Suleyman; Sahin, Yakup
In this paper, soft switching isolated half-bridge converter with a new active snubber cell that uses switched capacitor for renewable energy applications is proposed. The proposed snubber cell does not consist any magnetic element so that its structure is quite simple. Furthermore, the auxiliary switches in the proposed active snubber cell are exposed to only half of the input voltage. There is no additional voltage and current stress on any semiconductor devices. All semiconductor power devices in the proposed converter are operated by soft switching. The proposed converter is analyzed thoroughly, and the theoretical analyzes are affirmed by an implementation having 300-VDC input, 20-VDC output, 75-W output power, and 150-kHz switching frequency. The overall hard switching efficiency of the converter is increased from 86.4% to 92.9% by aid of the proposed soft switching snubber cell.
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ArticleYalnız künye2021/r/ebyu/14096
Technological innovation, financialization, and ecological footprint: evidence from BEM economies
Destek, Mehmet Akif; Manga, Muge
Despite the growing interest in researches on the impact of technological development on carbon emissions, the effect of technological innovation on the other indicators of environmental degradation is of little interest. In order to close this gap, the aim of this study is to determine the effects of technological innovation on both carbon emission and ecological footprint for big emerging markets (BEM) countries. In doing so, the environmental impacts of the financialization process are also explored, in line with the fact that these countries face constraints in financing technological developments. In this context, the effects of technological development, financialization, renewable energy consumption, and non-renewable energy consumption on environmental degradation are examined through the second-generation panel data methods for the period 1995–2016. The findings indicate that technological innovation is effective in reducing carbon emissions, but does not have a significant impact on the ecological footprint, namely a 1% increase in technological innovations reduces carbon emission by 0.082–0.088%. Moreover, it is found that financialization harms environmental quality for both indicators of the environment because a 1% increase in financialization increases carbon emissions by 0.203–0.222% and increases ecological footprint by 0.069–0.071%.
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Conference ObjectAçık Erişim2021/r/ebyu/14056
A New Bearing Fault Diagnosis Method using Envelope based Feature Extraction
Tastimur, Canan; Karakose, Mehmet; Aydin, Ilhan; Akin, Erhan
The performance of conventional intelligent diagnostic methods depends on the feature extraction of faulty signals. Feature extraction from defective signals requires signal processing techniques, expert knowledge, and human exertion. In this study, a time series based classification technique was developed to detect malfunctions occurring in induction motors. The proposed algorithm only takes the vibration signals as input. The phase space of the vibration signals taken as input is generated according to the time delay and embedding dimension for each motor status. Each motor condition is divided into two classes: faulty and intact. After the envelope transform is enforced into each signal, phase space is obtained. Then the Gaussian mixture model is formed. After with K-means clustering algorithm, the classification has been made up of four classes which are normal, outer race, inner race, and ball. The proposed approach has been tested on normal and defective vibration signals and results with high accuracy have been obtained.
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ArticleAçık Erişim2020/r/ebyu/22162
Design, Producing and Testing of 12-Step Three-Phase Voltage Source Inverter with Flexible Independent PWM Current Control for Brushless Direct Current Motor
Özgenel, Mehmet
Brushless motors are used in wide areas in the industrial and domestic applications owing to their superior advantages over other type electric motors such as induction and brushed direct current motors. Owing to fact that the brushless direct current motors and their drivers are cheaper and easier to design than drives of permanent magnet synchronous motors, brushless direct current motors are preferred a large application areas. But BLDC motor drivers are still run classical three-phase six- step inverter. Because of that the BLDC motors are run classical three-phase six-step inverter, the BLDC motor does not show its real dynamic performance. If BLDC motor is run via 12-step inverter, it gives a better dynamic performance than that of six-step inverter. The aim of this study, to manufacture 12-step inverter which controls phase currents using pulse width modulation (PWM) technique and to analyze the dynamic performance of BLDC motor running under purposed 12-step inverter. In the 12-step inverter, two or three transistors are on conduction mode at each time interval alternatively and in order to keep switching losses minimum only one transistor runs PWM mode in this study. The experimental results show that purposed flexible independent PWM 12-step inverter works perfectly and this proposed inverter provides the BLDC motor generating high dynamic performance than that of six-step one.
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ArticleAçık Erişim2020/r/ebyu/22134
Investigation of the Usability of Waste Kevlars in Concrete Road Pavements
Bayata, Halim Ferit; Tunçel, Mustafa Uraz; Bayrak, Osman Ünsal; Bas, Fatih Irfan
At the present time, fiber optic cables are generally used in the communication sector. In our country, there are 324 thousand km of fiber cables including only 256 thousand km in Turk Telekom operators and 68 thousand km in other operators. These cables, which have a service life of 20 years, need to be renewed over time and the cables that are out of use are scrapped. An average of 15,000 km of cable is scrapped annually. Approximately 5 Kg of kevlars become waste in 1 km length cable. Since waste kevlars do not have a separate usage area, they cannot be recycled to the economy. In this study, the usability of the concrete produced with kevlar on the road superstructure was investigated. For this purpose, water / binder ratio (0.40, 0.45, 0.50), silica fume (%0, 5, 10 instead of cement), kevlar (0 gr / m3, 500 gr / m3, 1000 gr / m3) and polypropylene fiber (0 gr / m3, 500 gr / m3, 1000 gr / m3) are determined as mixture variables. According to the full factorial experiment design, 3 x 34 = 243 samples must be poured for each of the compressive strength, rupture modulus and elasticity modulus tests. In the case of a grand total, 729 samples are required if a full factorial experiment design is applied. For this reason, Taguchi method was used for the experimental design and optimum mixture variables that gave 28 days of flexural and compressive strength were determined by the modulus of elasticity. Considering the factor and number of the levels, the $L_9$ orthogonal array was chosen as the experimental design and the study to be performed with a total of 3x9x3 = 81 samples and 729 samples was represented. From the results of the experiment, it has been observed that Kevlar material has positive effects on the compressive, flexural and elasticity modulus values added up to 500 g / m3 in the concrete. Since polypropylene fiber and kevlar were tested together in the experiments, it is predicted that this rate will increase only in the use of kevlar. From the results, it was observed that Kevlar which is a waste material can be brought to the economy by adding to the concrete.
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ArticleAçık Erişim2020/r/ebyu/22133
SIMO Haberleşme Kanallarında Enerji Tabanlı İşbirlikli Spektrum Algılama
Ilgın, Fatih Yavuz
Son yıllarda haberleşme sistemlerinde yaşanan hızlı gelişim süreci, kablosuz haberleşme uygulamalarının sayısını oldukça artırmışdurumdadır. Kablosuz haberleşme sistemlerinde gerçekleşen bu gelişim, beraberinde spektrumda daha fazla band genişliği ihtiyacınıda gerektirmektedir. Band genişliği talebinin artışı ise spektrum kıtlığı problemini gün yüzüne çıkarmıştır. Spektrum kıtlığı probleminiaşmak için en geçerli yol, sabit frekans tahsisi yerine fırsatçı spektrum kullanımına geçilmesidir. Spektrumu fırsatçı kullanarakdinamik spektrum atama yöntemlerini uygulamak ise Bilişsel Radyo sistemlerinin temel amacıdır. Bilişsel Radyo bulunduğu spektrumortamını algılayarak boş spektrum bölgelerini belirleyerek bu bölgeleri ikincil kullanıcıların erişimine açmaktadır. Ikincil kullanıcıspektrum kullanımı için belirli bir ücret ödemeyen veya bir spektrum bölgesini yasal olarak kullanma hakkına sahip olmayan kişidir.Aynı şekilde lisanslı kulanıcı ise belirli bir spektrum bölgesini yasal olarak kullanma hakkına sahip kişi olarak tanımlanmaktadır. Butanımlar doğrultusunda yapılan bu çalışmada Bilişsel Radyo sistemleri için spektrum algılama yöntemlerinden biri olan, EnerjiTabanlı Spektrum Algılama için, adaptif bir spektrum algılama yöntemi önerilmiştir. Ayrıca önerilen yöntemde gürültü seviyesinintahmini için farklı bir kestirim yöntemi önerilmektedir. Bilindiği üzere enerji tabanlı algılama yöntemlerinin en büyük dezavantajıgürültü belirsizliği faktörünün algılama performansı üzerinde oluşturduğu olumsuz etkidir. Bu olumsuz etkiyi azaltmak için önerilenyöntemde ortamda bulunan gürültü, Marhenko Pastur teoremi ile tahmin edilerek, eşik değeri adaptif şekilde değiştirilmektedir.Önerilen yöntemin Rayleigh sönümlemeli tek giriş- çok çıkışlı sistemlerde benzetim çalışmaları yapılmıştır. Benzetim çalışmalarıişbirlikli ve işbirliksiz algılama yöntemleri için farklı gürültü seviyeleri için incelenmiştir. Ayrıca benzetim sonuçlarında algılamateorisi çalışmaları için sıklıkla kullanılan ROC eğrilerine de yer verilmektedir. Böylece önerilen algılama yönteminde gelenekselenerji algılama yöntemine göre olumlu sonuçlar gözlemlenmiştir.
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ArticleAçık Erişim2020/r/ebyu/22123
Kentiçi Kavşakların Mikrosimülasyon Yöntemiyle Modellenmesi: Erzurum İli Örneği
Bayata, Halim Ferit; Bayrak, Osman Ünsal; Bas, Fatih Irfan; Çolak, Muhammed Ali; Demiriz, Ahmet Oğuz; Keleş, Ömer Faruk; Mazlum, Yusuf; Gürel, Mehmet Oğuzhan; Demircioglu, Muhammed Sami
Gelişen teknolojiye bağlı olarak dünya genelinde olduğu gibi Erzurum il merkezinde de araç sayısında artış meydana gelmiş veErzurum kent içi ana arter ve ana arterleri üzerinde bulunan kavşaklarda trafik hacminin artmasına sebep olmuştur. Erzurum’da sonbeş yılda motorlu taşıt sayısı 16.762 artarak 119.108’e ulaşmıştır. Artan trafik hacmi özellikle şehrin en merkezi kavşağı konumundaolan Tebrizkapı Kavşağı’nı etkilemiştir. Tebrizkapı Kavşağı kentin en işlek merkezi olan Cumhuriyet Caddesi, Karskapı Caddesi veen önemli alışveriş merkezlerinden biri olan Taş Mağazalar Caddesi arasında kaldığından özellikle sabah mesai başlangıç saatleri veakşam mesai bitim saatlerinde ciddi trafik yoğunluklarına maruz kalmaktadır. Sayım sonuçları doğrultusunda Tebrizkapı Kavşağı’ndasabah zirve saati 07:45 ile 08:45 ve akşam zirve saati 16:45 ile 17:45 arasında olduğu belirlenmiş ve simülasyon yapılırken yoğunlukolan zirve saatlerin trafik hacimleri alınmıştır.Bu çalışmada, AIMSUN yazılımı kullanılarak Tebrizkapı Kavşağı’nın mevcut durum ve farklı kavşak tipleri ile tasarımlarıMikrosimülasyon ile simüle edilmiştir. Üretilen modellerin doğruluğunu ölçmek için trafik hacimleri üzerinde doğrulama testi olarakkullanılan GEH (Geoffrey E. Havers) formülünden faydalanılmıştır. Mevcut durumdaki gecikme süresi 41,10 saniye ve beklemesüresi 26,85 saniye olarak bulunmuştur. Mevcut durumdaki kavşak tipi değiştirilerek Modern Dönel Kavşak ve Farklı Düzey Kavşaktasarlanarak simülasyonları yapılmıştır. Yeni yapılan tasarımların gecikme süreleri Modern Dönel kavşak için 9,21 saniye, FarklıDüzey Kavşak için 5,03 saniye, bekleme süreleri ise Modern Dönel Kavşak için 1,66 saniye ve Farklı Düzey Kavşak için 1,20 saniyeolarak bulunmuştur. Simülasyonlar sonucunda gecikme süresi ve bekleme süresi faktörleri dikkate alınarak en uygun kavşak tipiFarklı Düzey Kavşak olarak bulunmasına rağmen yapım maliyetinin çok yüksek olmasından dolayı Modern Dönel Kavşak yapılmasıen uygun seçim olarak belirlenmiştir.
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ArticleAçık Erişim2020/r/ebyu/21974
Ekonomik karmaşıklık düzeyi ve CO2 emisyonu arasındaki ilişkinin analizi: asean ülkeleri örneği
Soyyiğit, Semanur; Akiş, Elife
İkili yapının hakim olduğu gelişen ülkeler geleneksel kesimden (tarım) modernkesime (sanayi) geçiş yaparken, üretimleri de düşük katma değerli ve bilgi içeriğidüşük mallardan, yüksek katma değerli mallara doğru bir geçiş sergilemektedir.Yapısal dönüşüm olarak adlandırılan bu geçiş sürecinde, üretim niteliği değişimgösterirken, ülkelerin enerji ihtiyaçları ve enerji tüketimleri de artmaktadır. Bu durum,özellikle küresel ısınma sebebiyle çevresel duyarlılığın daha da arttığı günümüzde,gelişen ülkelerin yapısal dönüşümü çevresel kötüleşme pahasına mı gerçekleştirdiğisorularını akla getirmektedir. Bu amaçla bu çalışmada, Dünya Bankası raporundada belirtildiği gibi, 1965’ten itibaren önemli bir büyüme performansı sergilemeyebaşlayan ve küresel değer zincirinde önemli birer ülke konumuna gelen ASEAN’ınkurucu ülkelerinde, yapısal dönüşüm ve CO2 emisyonu arasındaki uzun dönem ilişkisiincelenmektedir. Ekonomik karmaşıklık indeksi, son dönemlerde yapısal dönüşümütemsil eden bir değişken olarak kullanılmaktadır. Söz konusu ülkeler için 1990-2014dönemi kapsamında ekonomik karmaşıklık indeksi ve CO2 emisyonu arasındakieşbütünleşme analizi sonuçları, ekonomik karmaşıklık indeksinin uzun dönemdeTayland, Filipinler ve Endonezya’da CO2 emisyonu üzerinde negatif etkisinin olduğunuortaya koymaktadır. Bir diğer ifadeyle, uzun dönemde adı geçen ülkelerin ekonomikkarmaşıklık düzeyi arttıkça, CO2 emisyonları azalmaktadır.
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ArticleAçık Erişim2020/r/ebyu/20925
The Effect of Different Additives Materials and Different Concrete Strength Levels on the Ductility of Short Beams
Kumbasaroglu, Atila; Sezgin, Halil İbrahim
Short-spanned beams generally have inadequate flexural capacities to transfer the loads which cause ductility problems due to over exceeded shear forces. In addition to the use of stirrup alternative additive materials which are used for partially or fully replacing the stirrup bars have recently been met focus entirely on increasing the shear capacities of reinforced concrete members. In this study, an experimental study was conducted to investigate the improving of flexural capacity of short-spanned beams at different used concrete strength levels with different admixtures. A total of fourteen experimental reinforced concrete beams were tested under three point flexural strength tests. Failure patterns for each specimen were presented. Loaddisplacement relationships, initial stiffness, ductility ratio and energy dissipation capacities of different designed short-spanned beams were evaluated. As a result, the admixture material, which has a stronger adhesion property, was provided a higher bending capacity and thus a more ductile behaviour was achieved in the short-spanned beams.
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ArticleAçık Erişim2020/r/ebyu/20910
Evaluation of 110 Emergency Calls of Erzincan with Geographical Information Systems and Modeling with Different Statistical Analysis Methods
Bayata, Halim Ferit; Bayrak, Osman Ünsal; Gürel, Mehmet Oğuzhan
The most important criterion for 110 emergency call is the time, which is between the arrival of the teams at the event location after the emergency call and the initiation of emergency response; and called as “response time”. One of the most important problems affecting the intervention time is the problems arising from the station settlement. Today, advanced information technologies and imaging methods are widely used in the determination of the station settlement area. One of the methods used for this purpose is "Geographic Information Systems" (GIS). In the literature, various station settlement determination process in Turkey have been seen in the CBS. In this study, it is aimed to use time series and artificial neural networks to model the geographic information systems and calls to determine the coverage of the existing station locations based on the calls received by the 110 fire stations in Erzincan city center. The current research covers the neighborhoods of Erzincan center and the data were taken from the Erzincan Municipality Fire Department. SPSS (Statistical Package for the Social Sciences) package program, MATLAB program and ArcGIS program were used to analyze the data. In order to query the data in ArcGIS, basic geographical data (map) bases were created. Then, the data were digitized in the same coordinate system and transferred to the ArcGIS program. At the end of the research, the most appropriate the fire station were recommended with the locational analysis functions of GIS.
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ArticleAçık Erişim2020/r/ebyu/20223
Erzincan’da Motorlu Taşıtlar Tarafından Atmosfere Salınan Egzoz Emisyonları ve Tahmini Miktarlarının Belirlenmesi
Cetin, Murat; Ergüder, Tevfik Oğuzhan
Ülkemizde ulaşımda yaygın olarak içten yanmalı motorlar ile hareket eden taşıtlar kullanılmaktadır. İçten yanmalı motorlu taşıtlardan kaynaklanan zararlı egzoz gazlarının hava kirliliğinde önemli bir rolü vardır. Bu taşıtlar yaygın olarak yenilenemeyen fosil yakıtlardan üretilen benzin, motorin ve LPG gibi yakıtlarla çalıştırılmakta olup, bu yakıtların yakılması sonucunda CO, CO2, NOx ve PM gibi emisyonlar atmosfere bırakılmaktadır. Erzincan il merkezinde artmakta olan motorlu taşıt sayısıyla birlikte hava kirliliği miktarı da artmaktadır. Temel olarak motorlu taşıtların atmosfere bıraktığı emisyon miktarları hesaplanırken taşıt profili ve emisyon faktörü gibi verilere gereksinim duyulmaktadır. Çalışmada kullanılan il merkezindeki taşıtlarla ilgili veriler, yapılan anket çalışmaları ve Erzincan Trafik Bölge Müdürlüğü’nden alınan bilgiler ile elde edilmiştir. Yapılan anketler ile farklı sınıflara ait 947 taşıta ulaşılmış olup, bu taşıtların üretim yılları, boyutları, Emisyon Standartları, kullandığı yakıt cinsi, kullanım amacı, segmenti gibi özellikleri belirlenmiştir. Elde edilen veriler doğrultusunda taşıtlar belirlenen sınıflara ayrıldıktan sonra COPERT 5 programı yardımıyla emisyon miktarları teorik olarak hesaplanmış, Erzincan il merkezindeki motorlu taşıt kaynaklı hava kirliliğini önlemek için öneriler sunulmuştur.
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ArticleAçık Erişim2020/r/ebyu/18545
In Turkish Earthquake Seismic Codes 2007-2018 Comparison of Building Elements Extraction Scenarios and Building Periods
Aslay, Semi Emrah; Bede, Tayfun
In this study, software is developed by using MATLAB codes, which can make building period calculation for a reinforced concrete structure with fast iteration technique. In this software, periods are obtained with the SAP2000 OAPI, depending on the individual extraction of each of the structural elements. According to the 2007 and 2018 Turkish Earthquake Regulations, building periods and building element extraction scenarios are comparatively rapidly iterated. As a result, repetitive structural analyzes, which will take very long time under normal conditions, are made in a very short time with the software created and all structural elements are evaluated on a period-by-term basis with the possibility of constituting a structural problem. With this aspect, the study provides a rapid solution in the field of civil engineering for creating damage scenarios and performing multi-dimensional analysis. At the same time, it contributes to the need to use computer automations in the evaluation of building elements.
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Conference ObjectYalnız künye2020/r/ebyu/18270
Conflict-Free Route Planning For Autonomous Transport Vehicle
Aslan, Ozge; Yazici, Ahmet
This study deals with the problem of conflict-free route planning for multiple autonomous transport vehicles. In this study, an algorithm based on A* algorithm to solve conflict-free routing problems for multiple autonomous transport vehicles, is proposed. While classical A* algorithm plans routes for a single start and end node at the same time, the proposed algorithm plans routes for multiple start and end nodes without conflicts. The proposed algorithm apply waiting or change the route strategies to resolve conflict types. The proposed algorithm has been tested on multiple autonomous transport vehicles having different velocities (heterogeneous). Tests conducted within the scope of the study, show that the proposed algorithm finds effective conflict-free routes.
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ArticleAçık Erişim2020/r/ebyu/17960
Selection of solar energy supply facility location with robust optimization and an application
Karabulut, Turgut; Yavuz, Selahattin
Energy is a constant need and this need is a growing resource. Renewable energy, which is one of these energy sources, is very important for our world to be both clean and sustainable. One of the central belt countries in the world, Turkey is a very fortunate country in terms of renewable energy sources. In this study, a model for solar energy source installation and energy efficiency has been proposed for Erzurum, Erzincan, and Sivas. This model has been solved by deterministic and robust optimization. Pursuant to the results obtained from the solutions with these methods, the most suitable location has been determined. At the end of the study, it has been found out that Erzurum is the most suitable city for the selection of the location according to both solutions. According to deterministic solution for Erzurum, the efficiency has been observed between 83950724.1 and 87591854.81 while it has been between 83416034.92 and 87065524.19 according to robust solution. There has been an approximately 0.618% difference between these two solutions.
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ArticleYalnız künye2020/r/ebyu/17925
Airports' role as logistics centers in humanitarian supply chains: A surge capacity management perspective
Polater, Abdussamet
The purpose of this study is to investigate the key factors of airport logistics surge capacity and the relationships between these elements. The findings show that successful airport surge capacity management is closely related to prioritizing the flights and operational activities; considering the influx of local people to airports and local infrastructure capacity in the planning phase; developing suitable methods to encourage people to take part in surge operations; providing uninterrupted communication in and out of airport. In view of the above-stated findings this study suggests that airports can meet the surge demand through systematic capacity planning of the existing and additional human, supply, system and space elements by considering experienced or anticipated capacity shortages in disaster conditions.
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