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Reliability modeling and analysis of mixture of exponential distributions using artificial neural network
Get PDFIn recent years, statisticians have become more and more interested in the study of mixture models, especially in the last decade, without adequately considering the difficulty of modeling the reliability measures of mixture models using artificial neural networks. In this study, in which artificial neural networks and mixed model reliability criteria are analyzed, various reliability parameters are calculated considering different scenarios. In order to estimate the obtained numerical reliability parameters, a multilayer artificial neural network model has been developed. Seven different reliability parameter values have been obtained from the artificial neural network model designed with four input parameters. The prediction values obtained from the artificial neural network model developed with five neurons in the hidden layer have been compared with numerical data, and the performance of the model has been analyzed comprehensively. The mean squared error (MSE) value for the network model has been calculated as 1.98E-08 and the R value as 0.99991. The results clearly revealed that the artificial neural network model developed using data from the appropriate statistical model is an excellent tool that can be used to estimate reliability measures
Data-driven energy consumption prediction of a university office building using machine learning algorithms
Get PDFRedundant consumption of energy in buildings is an important issue that causes increasing problems of climate change and global warming in the world. Therefore, it is necessary to develop efficient energy management approaches in buildings. Accurate prediction of energy consumption plays an important role to obtain energyefficient buildings. Data-driven methods gained attention for estimation of energy consumption in buildings which would provide more accurate prediction results. In this study, hourly energy consumption prediction is performed on a university office building to increase energy efficiency in the building using machine learning algorithms. A new parameter is proposed, air conditioning demand, to improve accuracy of the algorithms. Moreover, temporal parameters, i.e. day of week, month of year, and hour of day, were used along with meteorological parameters to improve prediction performance of the algorithms. Experimental results show that hourly energy consumption of the building could be predicted using machine learning algorithms with high performance. When the results were analysed, Deep Neural Network (DNN) achieved better performance among other alternative algorithms. The average values of R2, RMSE and MAPE for DNN were 0.959, 4.796 kWh, and 5.738 %, respectively. Also, the addition of proposed air conditioning demand parameter provided improved performance to the algorithms
Supporting process of inclusive students continuing rehabilitation in the context of their potential development area: An action research
Get PDFEğitim Bilimleri Enstitüsü, Temel Eğitim Ana Bilim Dalı, Sınıf Öğretmenliği Eğitimi Bilim DalıBu çalışmanın amacı ilkokul düzeyinde öğrenimlerine devam eden kaynaştırma öğrencilerinin rehabilitasyon merkezleri desteği ile potansiyellerini gerçekleştirme durumunun maksimum düzeye ulaşmasını sağlamaktır. Araştırma 2023-2024 eğitim-öğretim yılında Kayseri' de bulunan bir özel eğitim ve rehabilitasyon merkezinin ilkokul kaynaştırma öğrencilerinden oluşan 20 öğrenci, 5 veli ve 11 öğretmen ile birlikte toplam 36 kişi çalışmaya dahil edilmiştir. Araştırma 4 hafta süreç ve 1 hafta sonuç olacak şekilde 5 haftalık bir uygulama planlanmıştır. Araştırma da elde edilecek bulgular için eylem araştırması kullanılmış ve planlar dahilinde hareket edilmiştir. Veri toplama araçları olarak gözlem, görüşme, araştırmacı günlükleri, fotoğraf ve video-kayıt kullanılmıştır. Öğrencilerin potansiyel düzeyini artırmak ve maksimum düzeye ulaşmalarını sağlamak için öğretmen, veli, çevre ve öğrenci potansiyeli olarak ele alınmıştır. Etmenlerden her birinin birlikte iş birliği sonucu iletişim kurması, etkinliklere katılması öğrencinin kendini gerçekleştirme süreci bağlamında olumlu sonuçlar yaratmıştır.The aim of this study is to maximize the realization of the potential of inclusion students who continue their education at primary school level with the support of rehabilitation centers. A total of 36 people, including 20 students, 5 parents and 11 teachers, consisting of primary school inclusion students of a special education and rehabilitation center in Kayseri in the 2023-2024 academic year, were included in the study. The research was planned as a 5-week application with 4 weeks of process and 1 week of result. Action research was used for the findings to be obtained in the research and action was taken within the plans. Observation, interviews, researcher diaries, photographs and video-recordings were used as data collection tools. In order to increase the potential level of the students and to ensure that they reach the maximum level, teacher, parent, environment and student potential were considered. The fact that each of the factors communicated and participated in the activities as a result of cooperation created positive results in the context of the student's self-realization process
Türkiye in the Second World War from the perspectives of Akşam Newspaper (1939-1942)
Get PDFSosyal Bilimler Enstitüsü, Tarih Ana Bilim Dalı1939-1945 yılları arasında altı yıl devam eden İkinci Dünya Savaşı, asrın felaketi olarak nitelendirilmiştir. Bütün dünya ülkelerini ve insanlarını etkilemekle beraber; atmış milyona yakın insanın ölümüne, geri kalanların ise yurtsuz, evsiz kalmasına sebebiyet vermiştir. Dünya, Adolf Hitler gibi bir insanın tek başına neleri yapabileceğine şahit olmuştur. Ayrıca ırkçılık kapsamında yapılan olağandışı katliamlar, esaret hayatı, bitmek bilmeyen acılar yaşanmıştır. İkinci Dünya Savaşı Türkiye'yi de derinden etkilemiştir. Savaşa dahil olmayan Türkiye maddi ve manevi büyük kayıplar vermiştir. Savaşa katılmamak adına yoğun çaba sarf edilmiştir. Uygulanan dış politika ile başarılı sonuçlar elde edilmiştir. Birinci Dünya Savaşı'na son veren antlaşmalar; kalıcı barışı sağlamadığı gibi, daha büyük felaketin sorumlusu oldu. Siyasi istikrarsızlık, belirsizlik beraberin de ekonomik bunalımı tetikledi. Almanya ve müttefikleri yeni yaşam alanı adı altında, ülkelerini ve vatandaşlarını savaşa sürükleyip, akabinde tüm dünyayı etkileyen büyük hasara yol açmışlardır. Umarım dünya bir daha böyle bir savaşı yaşamaz. Anahtar Kelimeler: İkinci Dünya Savaşı, Türkiye, HitlerThe Second World War, which lasted for six years between 1939 and 1945, has been described as the catastrophe of the century. Although it affected all countries and people of the world, it caused the deaths of nearly sixty million people and left the rest homeless and homeless. The world witnessed what a man like Adolf Hitler could do all by himself. In addition, extraordinary massacres, a life of captivity and endless suffering were experienced within the scope of racism. The Second World War also deeply affected Turkey. Turkey, which was not involved in the war, suffered great material and moral losses. Intense efforts were made not to participate in the war. Successful results were achieved with the foreign policy implemented. The treaties that ended the First World War did not provide a lasting peace and were responsible for a greater catastrophe. Political instability and uncertainty triggered an economic crisis. Under the name of a new living space, Germany and its allies dragged their country and its citizens into war, and then caused great damage that affected the whole world. I hope the world will never experience such a war again. Keywords: World War II, Turkey, Hitle
The relationship between nurses'psychological empowerment and attitudes towards their productivity
Get PDFSağlık Bilimleri Enstitüsü, Hemşirelik Ana Bilim Dalı, Psikiyatri Hemşireliği Bilim DalıBu araştırmada, hemşirelerin psikolojik güçlendirmeleri ile verimliliklerine ilişkin tutumları arasındaki ilişkinin incelenmesi amaçlanmıştır. Araştırma, Adana ilinin Yüreğir ilçesinde hizmet veren bir devlet hastanesinde görev yapmakta olan 334 hemşireyle yürütülmüştür. Hemşirelere Spreitzer Psikolojik Güçlendirme Ölçeği ve Hemşirelikte Verimliliğe İlişkin Tutumlar Ölçeği uygulanmıştır. Veriler; bilgisayar ortamında ortalama, standart sapma, ortanca, Kruskal Wallis testi, Mann-Whitney U testi ve Bonferroni düzeltmeli Mann Whitney U testi ile analiz edilmiştir. Çalışmanın örneklem gücü G-Power-3.1.9.2 programı ile 334 kişiye uygulanan analiz sonucunda ?=0,05 düzeyinde, etki büyüklüğü 0.146 olarak bulunmuş ve post-hoc olarak hesaplanan çalışmanın gücü 0,76 olarak hesaplanmıştır. Hemşirelerin Psikolojik Güçlendirme Ölçeği'nden aldıkları puan ortalaması 54.11±13.68, ölçeğin alt boyutlarından olan ''Yetkinlik Boyutu''ndan aldıkları puan ortalaması 15.57±3.94, ''Etki boyutu"ndan aldıkları puan ortalaması ise 9.95±4.40 olarak bulunmuştur. Hemşirelerin Verimliliğe İlişkin Tutum Ölçeği'nden aldıkları puan ortalaması 43.46±16.65, ölçeğin alt boyutundan olan ''Mesleğe Bağlılık'' alt boyutundan aldıkları puan ortalaması 73.83±4.76, ''Ödüllendirme" alt boyutundan aldıkları puan ortalaması 24.70±3.03 olarak bulunmuştur. Hemşirelerin psikolojik güçlendirmeleri ile verimliliğe ilişkin tutumları arasındaki puanlarında pozitif yönde zayıf düzeyde bir ilişki olduğu bulunmuştur.The aim of this study is to examine the relationship between nurses' psychological empowerment and their attitudes towards productivity. The research was conducted with 334 nurses working in a public hospital serving in Yüreğir district of Adana province. The Spreitzer Psychological Empowerment Scale and the Attitudes Toward Effectiveness in Nursing Scale were administered to the nurses. Data; Mean, standard deviation, median, Kruskal Wallis test, Mann-Whitney U test and Mann Whitney U test with Bonferroni correction were analyzed in computer environment. As a result of the analysis applied to 334 people with the G-Power-3.1.9.2 program, the sample power of the study was found to be ?=0.05, the effect size was 0.146, and the power was found to be ?=. 0.05. The post-hoc calculated rate of the study was calculated as 0.76. The average score that nurses received from the Psychological Empowerment Scale was 54.11±13.68, the average score they received from the Competence Dimension, one of the sub-dimensions of the scale, was 15.57±3.94, and the average score that nurses received was 15.57. ±3.94. The score obtained from "Effect Size" is 9.95±4.40. The average score nurses received from the Attitudes Towards Productivity Scale was 43.46±16.65, the average score they received from the "Commitment to the Profession" sub-dimension of the scale was 73.83±4.76, and the average score they received was 73.83± 4.76. From the "Reward" sub-dimension, it was found to be 24.70±3.03. It was determined that there was a weak positive relationship between nurses' psychological empowerment scores and their attitudes towards productivity
Phylogenetic Analysis of Anatolian Blind Mole Rats (Nannospalax) with Allopatric 2n=54 Cytotypes
Get PDFBlind mole rats (Nannospalax) in Turkey, adapted to low-oxygen subterranean habitats, demonstrate considerable diploid chromosome number diversity, including species like Nannospalax xanthodon, Nannospalax leucodon, and Nannospalax ehrenbergi. However, uncertainties persist regarding the taxonomic status and nomenclature of populations with varying diploid chromosome numbers. Resolving these uncertainties is essential for effective biodiversity management and strategic conservation planning within the ecosystem. This study focuses on elucidating the phylogenetic relationships within the blind mole rat genus Nannospalax, particularly among individuals exhibiting the 2n = 54 cytotype across diverse Turkish geographical regions. Utilizing nuclear (IRBP gene region) and mitochondrial DNA (D-loop control region and 16S rRNA gene regions), the study addresses key questions regarding the phylogenetic relationships between allopatric cytotypes sharing the same diploid chromosome number. The analyses, employing Maximum Likelihood, Neighbor Joining, and Network phylogenetic methods, reveal a preliminary differentiation level suggesting the potential existence of at least three cryptic species within the 2n = 54 cytotypes in Anatolia. It is emphasized that these conclusions are preliminary due to the limited sample size, necessitating further investigation. Additionally, the research validates the morphologically based species Nannospalax tuncelicus among Turkish blind mole rats. Genetic distance values from sequence analyses indicate significant divergence, establishing Nannospalax tuncelicus as a distinct species from other recognized species in Turkey. The study underscores the importance of resolving uncertainties in taxonomic status for effective biodiversity management and conservation planning. Future studies should expand sample sizes and comprehensively address the phylogenetic background of cytotypes, especially the & Idot;mamo & gbreve;lu-Adana (2n = 54) population within the Nannospalax ehrenbergi species, to enhance our understanding of the evolutionary dynamics within this genus.Nigde Omer Halisdemir University, Scientific Research Projects Coordination Unit [FMT 2022/3-HIDEP]This study was supported by Nigde Omer Halisdemir University, Scientific Research Projects Coordination Unit(Project No: FMT 2022/3-HIDEP)
Examining Defensive Medicine Behaviors in Physicians in Terms of Socio-Demographic Variables: A Cross-Sectional Study
Get PDFIntroduction: The aim of this cross-sectional study is to evaluate physicians' attitudes regarding defensive medicine practices and to investigate defensive medicine practices in terms of socio-demographic variables. Method: Research population was all of the 219 physicians working in public institutions in Aksaray city center. Although the entire population was aimed to be reached, 140 physicians agreed to participate. Data were collected from general practitioners, family physicians, specialist physicians and academic physicians by face-to-face interviews. Data collection tools used in the study include a personal information form containing demographic and sociocultural characteristics of physicians and the Defensive Medicine Practices Attitude Scale. The collected data was analyzed using the SPSS 25.0 package program. Findings: More than half (55%) of the participants stated that they had heard of the concept of defensive medicine, but 69.3% stated that they did not know enough about the content of the concept. Additionally, 80.7% of the participants believe that malpractice lawsuits affect medical practice and 90.7% think that there is an increase in malpractice lawsuits. The averages of the statements regarding the positive and negative defensive medicine sub-dimensions are 3.38±0.60 and 3.19±0.99, respectively, which shows that physicians tend to have a defensive attitude. Conclusion: It has been observed that physicians frequently resort to defensive medicine practices in order to protect themselves from malpractice lawsuits. It has been determined that these behaviors vary depending on factors such as gender, job title, unit of study, reason for choosing medicine, age, professional experience, and years of working in the institution. Physicians turning to defensive medicine practices does not benefit patients, and it is recommended that they be made aware of this issue. The workload of physicians and the number of patients per physician should be reduced
Experimental and numerical investigation of the damage state of Ti-6Al-4V alloy sheet in the tensile test, hydraulic bulging, and hydroforming processes
Get PDFThere has not been any damage prediction using Johnson-Cook's (JC) hardening and damage model in the hydraulic bulging (HB) and hydroforming (HF), which are the advanced manufacturing processes, of the Ti-6Al-4V (Ti64) alloy. In the presented study, the damage behavior of the Ti64 alloy sheet in the HB and HF processes was investigated both experimentally and numerically for the first time to address the existing research gap. In this context, firstly, tensile tests (TT) were carried out on samples with different stress triaxiality values at three different tensile speeds, and the fracture morphologies of the samples were examined to evaluate whether it was appropriate to use the JC hardening and damage model. Since the fracture surfaces generally exhibit a ductile fracture morphology and are affected by stress triaxiality and strain rate, it was determined that it would be appropriate to use the JC hardening model and damage criterion to predict the damage of the Ti64 alloy in finite element analysis (FEA). Then, JC model parameters were determined by fitting the stress-strain curve obtained from the FEA and experimental tensile tests. In the HB experiments, bulging height and thickness thinning were predicted by FEA with an accuracy of 97% and 96.85%, respectively. In the HF experiments, the experimental burst pressure, die inlet radius, and base radius were predicted correctly at a rate of 92.5%, 95.5%, and 97.8%, respectively. Also, the thickness of the sample showed good agreement with the FEA results. The fracture zones in each process exhibited good agreement with the experimental results. Thus, it has been demonstrated that the JC damage criterion can be successfully applied in FEA if the Ti64 titanium alloy is damaged in various processes.Konya Technical University Scientific Research Projects CoordinatorshipThe work presented in this article was conducted as the master's thesis of Yusuf Furkan Yapan at the Department of Mechanical Engineering of Konya Technical University
Determining the quality level of ready to-eat stuffed mussels with Arduino-based electronic nose
Get PDFIn this study, the performance of a pre-designed and low-cost Arduino electronic nose for determining the quality of stuffed mussels was analyzed. In addition, 1000 images were taken on each storage day in order to determine the quality levels of stuffed mussel groups with open and closed shells by machine learning. Freshness limit values of stuffed mussels were determined as 200 for MQ3 and MQ135 sensors and 100 for MQ9 on the 3rd storage day when the total viable count (TVC) value exceeded 3 log CFU/g. In the study, faster neural networks with lower prediction times, such as SqueezeNet and GoogLeNet, were compared with ResNet-50, ResNet-101 and DenseNet-201 neural networks, which have larger prediction times but better accuracy. Study data showed that residual network (ResNet) 50 and Teachable Machine (TM) had high success in determining the quality levels of stuffed mussels.Nigde Omer Halisdemir UniversityNo Statement Availabl
The modification of nisin with homocysteine thiolactone and its effect on antimicrobial activity
Get PDFThe aim of the present study is to make an important contribution to the literature by focusing on the preparation of the N-homocysteine conjugate of nisin and evaluating the effect of the N-homocysteinylation reaction on its antimicriobial activity. The modification process was monitored using both acetic acid urea polyacrylamide gel electrophoresis (AAU-PAGE) and tricine sodium dodecyl sulphate polyacrylamide gel electrophoresis (tricine SDS-PAGE). The antibacterial effectiveness of modified nisin was assessed against Staphylococcus aureus ATCC 6538, Enterococcus faecium ATCC 9097, Bacillus subtilis ATCC 6633, Lactococcus lactis ssp. cremoris Au, Listeria monocytogenes NCTC 5348, and Escherichia coli RSKK. Optimal conditions for achieving the highest N-homocysteinylation degree (6.30%) were determined as 6 mg/mL nisin, 150 mM homocysteine thiolactone, 150 rpm shaking rate, pH of 3.0, and a reaction time of 6 h. The modified nisin obtained did not have a significant inhibitory effect on the strains tested except E. faecium. E. faecium was inhibited by the modified nisin and its antibacterial activity was determined as approximately 10% of the antibacterial activity of unmodified nisin. On the other hand, hydrolysis of nisin by trypsin and thermolysin resulted in significant specific side chain modifications induced by the homocysteine-thiolactone reaction, especially at Lys12 and Lys22. The results provide valuable insights into the potential of N-homocysteinylation to improve the antibacterial properties of nisin and also suggest that the effects of specific modifications identified during the modification process should be investigated.Scientific Research Projects of Nigde Omer Halisdemir University [2014/21-BAGEP]The Scientific Research Projects of Nigde Omer Halisdemir University funded the present study (Project No: 2014/21-BAGEP)