TR Dizin İndeksli Yayınlar Koleksiyonu / TR Dizin Indexed Publications Collections

Permanent URI for this collectionhttps://hdl.handle.net/20.500.13091/4

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Citation - WoS: 5
Citation - Scopus: 4
12th June 2017 Offshore Karaburun-Lesvos Island Earthquake Coseismic Deformation Analysis Using Continuous Gps and Seismological Data
(SCIENTIFIC TECHNICAL RESEARCH COUNCIL TURKEY-TUBITAK, 2021) Yıldız, Hasan; Çırmık, Ayça; Pamukçu, Oya; Özdağ, Özkan Cevdet; Gönenç, Tolga; Kahveci, Muzaffer
Understanding the tectonic mechanism generated by the earthquakes and faults is possible only if the preseismic, coseismic and postseismic crustal deformation related to the earthquakes is determined properly. By the analysis of continuous GPS (CGPS) coordinate time series, it is possible to estimate the crustal deformation. Besides, accelerometer records at strong motion stations (SMSs) may support the CGPS-based estimates. In this study, CGPS coordinate time series were analyzed in comparison with the accelerometer records for clarifying the coseismic deformation caused by the earthquake occurred in the surrounding of Lesvos fault located in the northern part of Karaburun within the active mechanism that controls the area where the earthquakes occurred during June 2017 on the offshore Karaburun. The activity of this fault continued throughout June 2017 until the time when the main shock (12th June 2017, M-W = 6.2) occurred. We analyzed CGPS coordinate time series of AYVL and CESM and DEUG stations to determine the coseismic deformation due to the offshore Karaburun-Lesvos Island earthquake using the empirical mode decomposition (EMD) method. Besides, the EMD method results were compared with the accelerometer records obtained from the SMSs close to the CGPS stations and CGPS-based results were found to be consistent with the accelerometer records. Additionally, the horizontal displacements were calculated by Coulomb 3.3 software using different focal plane solutions and compared with CGPS-based results. Consequently, it is suggested an integrated use of CGPS and strong motion accelerometer networks for the joint assessment of the crustal deformation and for the cost-effective use of existing observation networks as well as for the establishment of future observation networks at lower cost.
Citation - Scopus: 1
2,4,6-Tris(p Synthesis and Electron Paramagnetic Resonance (epr) Analysis
(Sakarya University, 2022) Karataş, Ö.; Ceylan, Y.; Koç, Z.E.
A significant group of compounds arise from substituted s-triazine derivatives that have tripodal heterocyclic compound. Compounds classified as heterocyclic possible created the largest and most diverse family of organic compounds. In this study, we reported that a new template has been syntheses from a cyanuric chloride and its diamine derivative. The desired triamine a tripodal 2, 4, 6-tris (p-aminoaanilino)-1, 3, 5-triazine (C21H21N9), called to be TRIPOD, has been obtained from cyanuric chloride with 3 eq of p-phenylenediamine reaction in acetone. After synthesis, TRIPOD sample which was polycrystal form was irradiated by cobalt-gamma source. The electron paramagnetic resonance spectra of TRIPOD were recorded using X-band EPR spectrometer at room temperature in three axes (x, y, z) which are perpendicular at 10o intervals. The EPR spectrum was simulated using computer program and by using the spectrum. The radical structure was determined in the sample. © 2022, Sakarya University. All rights reserved.
The 2-Adic Valuation of Shifted Padovan and Perrin Numbers and Applications
(Tubitak Scientific & Technological Research Council Turkey, 2024) Bravo, Eric; Irmak, Nurettin
We characterize the 2-adic valuation of (Pn - 1) n >= 0 , where ( P n ) n >= 0 denotes the Padovan sequence. In addition, we use this formula to find all the Cullen and Proth numbers that are Padovan numbers. We also fully describe the 2-adic order of (Rn + 1) n >= 0 , where ( R n ) n >= 0 denotes the Perrin sequence, and use it to find all Woodall and Proth numbers of the second kind which are Perrin numbers. As a consequence we find that 3 , 5 , 9 , and 65 are the only Fermat numbers in the Padovan sequence; while 3 and 7 and 2 and 5 are the only numbers of Mersenne and Th & acirc;bit ibn Kurrah in the Perrin sequence respectively.
A 3d U-Net Based on Early Fusion Model: Improvement, Comparative Analysis With State-Of Models and Fine-Tuning
(Konya Teknik Univ, 2024) Kayhan, Beyza; Uymaz, Sait Ali
Multi-organ segmentation is the process of identifying and separating multiple organs in medical images. This segmentation allows for the detection of structural abnormalities by examining the morphological structure of organs. Carrying out the process quickly and precisely has become an important issue in today's conditions. In recent years, researchers have used various technologies for the automatic segmentation of multiple organs. In this study, improvements were made to increase the multi-organ segmentation performance of the 3D U-Net based fusion model combining HSV and grayscale color spaces and compared with state-of-the-art models. Training and testing were performed on the MICCAI 2015 dataset published at Vanderbilt University, which contains 3D abdominal CT images in NIfTI format. The model's performance was evaluated using the Dice similarity coefficient. In the tests, the liver organ showed the highest Dice score. Considering the average Dice score of all organs, and comparing it with other models, it has been observed that the fusion approach model yields promising results.
Aber Analysis of Ris-Aided Ssk Schemes Over Ricean Fading Channels
(2022) Canbilen, Ayşe Elif; Ates, Alper
Reconfigurable intelligent surface (RIS) is a promising technology to meet the needs of next-generation wireless communication techniques that enhance the quality of service by effectively adjusting the phases of the signals through a reflective surface. On the other side, space shift keying (SSK), as one of the typical index modulation (IM) techniques, provides data transmission by using only the information of the active transmitting antenna index instead of applying traditional modulation methods. In this study, two of the RIS-assisted SSK schemes are studied to take potential benefits of both RIS and SSK techniques, and the average bit error rate (ABER) performance is investigated over Ricean fading channels. The activated transmitter antenna for each transmission instant is detected by utilizing the maximum likelihood (ML) detection algorithm at the receiver side. The ABER performance of the proposed RIS-based systems in proportion to the increasing number of reflecting elements and Ricean-K factor is presented by both theoretical derivations and computer simulations. The obtained results show that the Ricean-K parameter and the number of reflective elements on the RIS have an undeniable effect on the system performance.
Citation - WoS: 1
Academic Text Clustering Using Natural Language Processing
(2022) Taşkıran, Fatma; Kaya, Ersin
Accessing data is very easy nowadays. However, to use these data in an efficient way, it is necessary to get the right information from them. Categorizing these data in order to reach the needed information in a short time provides great convenience. All the more, while doing research in the academic field, text-based data such as articles, papers, or thesis studies are generally used. Natural language processing and machine learning methods are used to get the right information we need from these text-based data. In this study, abstracts of academic papers are clustered. Text data from academic paper abstracts are preprocessed using natural language processing techniques. A vectorized word representation extracted from preprocessed data with Word2Vec and BERT word embeddings and representations are clustered with four clustering algorithms.
The Accessibility of Public Transportation Stops: Istanbul Case
(2023) Levend, Sinan; Öztaşkın, Dilara
The study emphasizes the importance of creating a sustainable public transportation system that people can use comfortably. This sustainable transportation approach aims to deliver transportation plans focused on people, society and space. Developing public transportation systems that contribute to social equality by appealing to all segments of society and reducing traffic density has become one of the main objectives of transportation plans. Ensuring the accessibility of public transportation stops is a crucial aspect of achieving this objective. In this context, the study examines the accessibility of public transportation stops in Istanbul. For the accessibility measurements of public transportation stops, the study uses the Service Areas Analysis tool in the ArcGIS program's Network Analyst extension, a geographical information system-based software program. The analysis results indicate that approximately 90% of the population can reach the stops of rubber-tyred public transportation types (one of the public transportation types in Istanbul) within a five-minute walking distance. However, the ratio of the population that can reach rail system stations and maritime transportation piers within a five-minute walking distance is only approximately 3%. Accordingly, it can be seen that the Istanbul transportation system depends heavily on the rubber-tyred public transportation system.
Citation - WoS: 1
Accuracy Assessment Toward Merging of Terrestrial Laser Scanner Point Data and Unmanned Aerial System Point Data
(2023) Karasaka, Lütfiye; Erdal, Kasım; Makineci, Hasan Bilgehan
Terrestrial Laser Scanning (TLS) techniques are widely preferred for 3D models of small and large objects, buildings, and historical and cultural heritages. However, sometimes relying on a single method for 3D modelling an object/structure is insufficient to arrive at a solution or meet expectations. For example, Unmanned Aerial Systems (UAS) provide perspective for building roofs, while terrestrial laser scanners provide general information about building facades. In this research, several facades of a selected building could not be modelled using terrestrial laser scanning, and UAS was used to complete the missing data for 3D modelling. The transformation matrix, a linear function, is created to merge different data types. In the transformation matrix, the scale was found to be 1:1.012. The accuracy analysis of the produced 3D model was also made by comparing the spatial measurements taken from different building facades and the differences in the measurement values obtained from the 3D model and calculating statistically. According to the accuracy analysis results, the Root Mean Square Error (RMSE) value is approximately 3 cm. The results of the accuracy research, which are within the 95% confidence interval with the three-sigma rule, are approximately 2 cm as RMSE. As a result of the study, it was determined that the data obtained from UAV photogrammetry and the data obtained by the TLS technique could be combined, and the integrated 3D model obtained can be used more efficiently.
An Adaptive and Hybrid State of Charge Estimation Method Integrating Sequence-To Learning and Coulomb Counting for Li-Ion Based Energy Storage Systems
(Konya Teknik Univ, 2025) Cımen, Halıl
For safe and long-lasting operation of Li-ion batteries used in electric vehicles and electric grid applications, the State of Charge (SOC) of the battery cell must be estimated with high accuracy. However, due to the uncertainty in environmental conditions and the complex nature of battery chemistry, SOC estimation still presents a significant challenge. In this study, an adaptive and hybrid method for SOC estimation of a Li-ion battery cell is proposed. Convolutional Neural Network (CNN) based Sequence-to-point learning architecture is used to estimate the initial SOC values at specific time intervals. In order to increase the estimation accuracy, a multi-scale CNN architecture is designed, and useful features are captured. The obtained estimation values are integrated with the partial coulomb counting method to increase the accuracy. In addition, the proposed model adaptively updates the estimation weights with the help of the estimation error data obtained during the full charging of the batteries. The proposed model is tested on the LG 18650HG2 dataset. The results prove that the proposed model is 23% more accurate than benchmark models at 25°C and 55.5% more accurate at 0°C.
The Adsorption of Cr(vi) and Organic Matter by New Generation Pyrolysis Char
(2021) Kalem, Merve; Yel, Esra; Arıkan, Zafer
Waste vehicle tires (WT) and high density polyetylene (HDPE) were pyrolyzed at 300, 500 and 700°C by slow pyrolysis. Solid product (pyrolysis char) were collected and pyrolysis char was used as adsorbent for COD and Cr(VI) removal. The char samples were characterized by BET, EDS, SEM and XRD analysis. Based on the BET, SEM and XRD results of the char samples, WT 700 can be used as adsorbents for Cr (VI) and organic material adsorptions. Cr(VI) and COD removal efficiency of char adsorbent were investigated. In the adsorption experiments, char was used as 0.1-0.5 g/100 mL doses and at 50°C and 80°C adsorption temperatures. The effects of adsorption temperature and char dosage on the adsorption efficiency were invesitigated. The maximum Cr(VI) adsorption capacity of this new generation char was found to be 14.09 mg/g for 80°C adsorption temperatures. 0.5 g/100 mL adsorbent dose was bettter in COD and Cr (VI) removals. The correlation of PSD1 (pseudo first order kinetic model) was better than PSD2 (pseudo second order kinetic model) for all doses. The Temkin and Langmuir isotherms were better isotherm for COD and Cr(VI) removals, respectively. A new approach were present to evaluation of waste HDPE and waste tires with this study.
Air Quality of Bursa: Temporal and Spatial Evaluation of PM10, PM2.5, NO2 and SO2 Pollutants Using IDW Geostatistical Technique
(2025) İspir, Duygu Arıkan; Yıldız, Ferruh
En önemli çevresel sorunlardan biri hava kirliliğidir. Bu sorun, çevreye ek olarak insan sağlığını da olumsuz etkilemektedir. Bu çalışmada, Türkiye'nin Bursa ili sınırları içinde 2022 yılına ait partikül madde 10 (PM10), partikül madde 2.5 (PM2.5), kükürtdioksit (SO2) ve azotdioksit (NO2) kirleticilerinin mekânsal ve zamansal analizi yapılmıştır. Şehirdeki hava kalitesi izleme istasyonlarından elde edilen 24 saatlik ölçümler kullanılarak aylık ve mevsimlik hava kirliliği haritaları oluşturulmuştur. Bu haritaların oluşturulmasında PM10, PM2.5, SO2 ve NO2 verileri kullanılmıştır. Kirlilik haritaları, Dünya Sağlık Örgütü (WHO) raporunda belirtilen kriterler ile Avrupa Birliği ve ulusal mevzuat tarafından belirlenen sınır değerler baz alınarak analiz edilmiştir. Elde edilen sonuçlara göre, yaz aylarında kirletici miktarı kış aylarına göre daha düşüktür. Yaz aylarında PM10 ortalama olarak 39.32 μg/m³ iken, kış aylarında ulusal mevzuatı %3.09 oranında aşmıştır. Ortalama yaz mevsiminde değerlendirildiğinde, PM2.5 ve SO2 konsantrasyonları sırasıyla 19.29 μg/m³ ve 5.82 μg/m³ olarak gözlemlenmiştir. Buna karşılık, kış mevsiminde PM2.5 ve SO2 konsantrasyonları sırasıyla 47.30 μg/m³ ve 11.07 μg/m³ olarak bulunmuştur. PM2.5 için ulusal mevzuatta yasal bir sınır bulunmamaktadır. SO2'nin belirlenen yasal mevzuatın altında olduğu tespit edilmiştir. NO2 yaz aylarında ortalama olarak 25.13 μg/m³ iken, kış aylarında ulusal mevzuatı %9.74 oranında aşmıştır. Bölgedeki kirleticilerin ana kaynakları incelenmiş ve bulgulara göre şehrin sanayi bölgesi olması ve yüksek trafik yoğunluğu gibi faktörlerin kirleticileri artırdığı belirlenmiştir. Bu araştırmanın sonuçları, Bursa'da hava kirliliğinin önemli bir sorun teşkil ettiğini göstermektedir.
Akıllı Sözleşmeler Kullanımıyla Güvenli Bir Çevrimiçi Sınav Sistemi
(2024) Oksuz, Ozgur
Kovid19 salgını eğitim başta olmak üzere birçok sektörü etkiledi. Hastalığın yayılmasını önlemek amacıyla tüm okul türleri (kamu ve özel), öğrencilerine çevrimiçi eğitim sistemleri sunmaya başladı. Online eğitim sistemi hastalığın yayılmasını durdurmanın yanı sıra birçok avantajı da beraberinde getirdi. Derslerin sınıfta olmaması nedeniyle öğrencilere daha fazla zaman kalıyor, fiziki olarak okula gitmedikleri için öğrenciler için maliyet düşüyor ve öğrencilerin derse katılım programlarını kendilerinin belirlemesi derslerde esneklik sağlıyor. Ancak çevrimiçi eğitim sisteminde bazı zorluklar var. Öğrencilerin sınava girmeleri, sınav sonuçlarını görüntülemeleri ve sınavlarını değerlendirmek üzere yüklemeleri sırasında sistemin kullanılabilir olması gerekmektedir. Dersler ve sınavlar online olarak yapıldığı için veriler çok önemlidir. Veriler sınavlar, cevaplar, puanlar, isim, doğum tarihi, adres, telefon numarası, resmi kimlik numarası vb. gibi hassas bilgileri içerir. Geleneksel bir çevrimiçi eğitim sistemi, tek bir kuruluş tarafından yönetilen ve idare edilen merkezi bir altyapıya sahiptir. Bu, sistemin tek hata noktası saldırılarına sahip olmasına neden olur. Bu makale akıllı sözleşmeye ve blokzincirine dayalı bir çevrimiçi sınav sistemi önermektedir. Blokzincir, tek nokta başarısızlık saldırılarını ortadan kaldırır. Öğretmenler sorular yazar ve bunları blokzincir'de saklar. Akıllı sözleşmeleri kullanarak sınavları yalnızca yetkili öğrenciler blokzincir'den alır. Öğrenciler tamamladıkları sınavları önceden belirlenen zamanlarda teslim ederler. Daha sonra öğretmenler öğrencilerin sınavlarını değerlendirir ve sonuçları blokzincir'e koyar. Sınav puanları her türlü yetkisiz kişiden şifreleme yoluyla korunur. Öğrenciler puanlarını istedikleri zaman özgürce görebilir ve görüntüleyebilirler. Daha sonra öğrenciler, dersleri başarıyla tamamladıklarını (staj veya işe başvurduklarında) sonuçlarını diğer üçüncü taraflara gösterebilirler. Sistem ayrıca ölçeklenebilirlik sorunlarını ortadan kaldırmak için merkezi olmayan bir depolama (zincir dışı) sistemi kullanıyor. Zincir dışı depolama (InterPlanetary Dosya Sistemi), öğrencilerin sınavlarını, cevaplarını ve sınav sonuçlarını saklarken, dosyaların karşılık gelen içerik tanımlayıcıları da blokzincirinde depolanır. Önerilen sistem, sınav sonuçlarını manipüle edebilecek kötü niyetli öğretmenlere karşı dayanıklıdır. Ayrıca önerilen sistem, sınav sonuçları hakkında şikâyette bulunabilecek dürüst olmayan öğrencilere de bir yöntem sunmaktadır. Başka bir deyişle, önerilen sistem varlıklar arasındaki her türlü çatışmayı çözmektedir.
Ambient Vibration Analysis of an Industrial Building
(2021) Kartal, Hüseyin; Dere, Yunus; Arslan, Musa Hakan
Due to the heavy and dynamic equipment, the vibration and resonance effects that are not encountered under static dead loading may amplify over time in industrial buildings. This might cause damage to the structural system and create human comfort problems while the structure is in service. In this study, ambient vibration testing of a building composed of reinforced concrete and steel structural systems and located at a boron processing plant in Turkey was performed. The velocities and accelerations caused by the sieve shaker system attached to the structure with springs, are evaluated under the effect of sample loading.
Citation - WoS: 8
Citation - Scopus: 9
Amplifying the Dielectric Constant of Shellac by Incorporating Natural Clays for Organic Field Effect Transistors (ofets)
(TUBITAK, 2023) Kim, S.; Yumuşak, Ç.; Irimia, C.V.; Bednorz, M.; Yenel, E.; Kuş, M.; Sariçiftçi, N.S.
We demonstrate in this work the practical use of uniform mixtures of a bioresin shellac and four natural clays, i.e. montmorillonite, sepiolite, halloysite and vermiculate as dielectrics in organic field effect transistors (OFETs). We present a thorough characterization of their processability and film forming characteristic, surface characterization, elaborate dielectric investigation and the fabrication of field effect transistors with two classic organic semiconductors, i.e. pentacene and fullerene C60. We show that low operating voltage of approximately 4 V is possible for all the OFETs using several combinations of clays and shellac. The capacitance measurements show an improvement of the dielectric constant of shellac by a factor of 2, to values in excess of 7 in the uniform mixtures of sepiolite and montmorillonite with this bioresin. © TÜBİTAK.
Analysing the Impact of Urban Growth on Agricultural Lands Using Sleuth Model and Google Earth Engine
(Konya Teknik Univ, 2024) Karasaka, Lutfiye; Gunes, Murat
In this study, it is aimed to determine the urban growth in the Sel & ccedil;uklu district of Konya, which is the study area with the SLEUTH model based on cellular automata, which is widely used in the modeling of urban growth and land use, and to examine the effect of urbanization on agricultural areas in the near future. In addition to the simulations carried out for the years 2030 and 2050 starting from 2015, which was determined as the last control year in the model, the simulation results of the year 2022 were compared with the terrain classes obtained from the Google Earth Engine (GEE) controlled classification of the 2022 Landsat satellite image. As a result of the creation of simulation models for the years 2030 and 2050, it was concluded that 10428.75-23747.49 hectares of agricultural land will be destroyed, respectively. The SLEUTH model has modeled a total of 56468.26 hectares of agricultural land for 2022. This corresponds to 95% of the classification result for 2022, which is an important factor in examining the accuracy of the model. This study, which aims to guide decision makers and planners, shows that the use of the SLEUTH model has for the examination of future land use.
An Analysis According To Regulation of Dbybhy 2007 and Tbdy 2018 by Equivalent Earthquake Load Method of a Reinforced Concrete Building
(Konya Technical University, 2021) Döndüren, Mahmud Sami; Hava, Şeyda; Ecemiş, Ali Serdar
Turkey is located at high-risk seismic region. As a result of earthquakes happened in our country, loss of life and property were encountered. For this reason seismic standarts and design codes were prepared. These standards have been revised depending to technological development and increment in seismic know-how during time. The last seismic code; Turkish Building Seismic Code 2018; was published in official gazette at 18 March 2018 and come into force at 01 January 2019.In this study; the differences and similarities between 2007 and 2018 Turkish Seismic Codes were compared. In the first part of the study seismic damages were investigated, afterwards the 2007-2018 codes were compared according to Equivalent Lateral Earthquake Load method and numerical comparisons were made on selected analysis building models. In accordance with this purpose a sample analysis building model having framed and wall-framed structural system with / without basement were selected at two locations (Konya and İstanbul) and at two soil classes ( Z1-ZA and Z3-ZD) and analysed. The analysis results were compared. As a result, TBDY 2018 concluded an increase in floor displacements and a decrease in floor shearing forces.
Citation - Scopus: 4
An Analysis and Countermeasures of Fatal Accidents Caused by Firedamp Explosions in Underground Coal Mines in Turkey
(2019) Dursun, Arif Emre
Fatal accidents in underground coal mines in Turkey are common and experienced frequently. The major accident categories for underground coal mining in Turkey are gas related accidents (firedamp and outbursts), roof falls, flooding, fire and transport. In recent years, coal mine gas related accidents in Turkey, which are usually caused by firedamp and outbursts, are still threatening miners’ lives. Firedamp explosions are majorly serious mine accidents that can occur quickly and cause great deal damage. In this study, work-related accidents caused by firedamp and another gas accidents in Turkey between the years 2010-2016 were analyzed. As a result of these analyses, the number of deaths in underground coal mines in the past 7 years is 550 and the fatality rate is found to be 96.86%. The percentage of gases as the cause of the deaths is 70.18%. In this study, countermeasures are proposed that can prevent and control firedamp explosions and other gas related accidents.
Analysis of Bending Moment-Curvature and the Damage Limits of Reinforced Concrete Circular Columns
(2020) Yüksel, S. Bahadır; Foroughi, Saeid
In this study; the effect of axial load levels, longitudinal reinforcement ratio, transverse reinforcement diameter and transverse reinforcement spacing were investigated on the moment curvature relationships of reinforced concrete columns. For this purpose, circular reinforced concrete columns having different parameters were designed considering the regulations of the Turkish Building Earthquake Code (2018). The behavior of the columns were investigated from the moment-curvature relation, by considering the nonlinear behavior of the materials taken into account. The moment-curvature relationships of the reinforced concrete column crosssections having different axial load levels have been obtained by considering Mander model, which considers the lateral, confined concrete strength. Moment-curvature relationships were obtained by SAP2000 Software, which takes the nonlinear behavior of materials into consideration. The designed reinforced concrete cross section models are considered to be composed of three components; cover concrete, confined concrete and reinforcement steel. The examined behavioral effects of the parameters were evaluated by the curvature and moment carrying capacity of the cross-sections. From the obtained moment-curvature relationship, cracking and destruction in cover and core concrete, yield and hardening conditions in reinforcement steel were calculated and the results were presented in charts and graphs. The confining effect in the core concrete is taken into account in the calculations. The behavior of the circular column sections and the types of refraction were interpreted according to the results obtained from the moment-curvature relationship of the sections. It is observed that the variation of the axial load, longitudinal reinforcement ratio, transverse reinforcement diameter and transverse reinforcement spacing have an important effect on the moment-curvature behavior of the reinforced concrete columns. The load bearing capacity of reinforced concrete column sections ends by destruction of the core concrete. Reinforced concrete column sections damaged by reinforcement yield before crushing of cover concrete exhibit more ductile behavior.
Analysis of Performance Coefficients in Maximum Electrical Power Extraction From Stand-Alone Wind Energy Conversion System
(2022) Dursun, Emre Hasan
Increasing performance and improving efficiency in maximum power extraction from Wind Energy Conversion Systems (WECS) is a quite important research topic. Today, in the large-scale WECS, it is widely aimed to extract the maximum mechanical power from the wind turbine using the Maximum Power Point Tracking (MPPT) unit. Similarly, it can also be targeted to achieve maximum mechanical power in small-scale WECS applications. However, losses occur in structural subsystems and electrical subunits located in WECS. Due to these losses, the overall system efficiency decreases and the characteristic of the system is also affected. The operation of these systems can also be performed via maximum electrical output power extraction, which is one of the most up-to-date ideas. Thus, the overall WECS rather than the wind turbine can be optimally controlled. Eventually, maximum electrical power tracking (MEPT) based designs can provide higher power extraction with higher efficiency than MPPT-based ones. In this paper, considering the system operating concepts with MPPT and MEPT for a stand-alone Permanent Magnet Synchronous Generator (PMSG) based WECS, the changes in performance coefficients at defined focus points in terms of system efficiency are evaluated. Technical and theoretical comparative analyzes are also made for each specific wind speed between 8m/s and 12m/s.
Analysis of Publications on Earthquake Research in Architecture Category and Analysis With R Studio-Biblioshiny Software
(2023) Karataş, Lale; Dal, Murat; Barkut, Emine Banu
The purpose of this research is to examine the publications focusing on earthquakes in the category of architecture (web of science). The data of the research was analyzed with the Biblioshiny software program. This software program makes a bibliometric analysis on which topics and concepts earthquake research focuses. In addition, images and frequencies of publications related to architecture and earthquakes were revealed. The data of the research was collected between 1-15 July 2023. Results for Architecture (WoS Categories) AND earthquake* (Topic) OR earthquake AND architecture (Topic) OR earthquake AND house (Topic) OR earthquake AND structure (Topic) OR earthquake AND damage (Topic) OR earthquake AND city (Topic) OR earthquake AND urban (Topic) and Türkiye (Countries/Regions). Data were collected with keywords in the Web of Science database. According to the research findings, there are 1033 publications and in the country/region category (Türkiye), 83 publications are accessed. The most used words in the publications are earthquake, urban transformation, Istanbul, seismic, retrofit, assessment, structural, urban, damage, buildings and performance.

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