2022 - Cilt 6 - Sayı 2
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Öğe Diploma verification using blockchain technology(Altınbaş Üniversitesi, 2022) Kazan, RamazanBlockchain technology is attracting attention from academies, industries, governments all over the world. Expectations of increased potential have led to extensive exploration of the use of this technology in various application platforms. Today, blockchain is considered to be a technological breakthrough that touches all areas of social life, and is expected to lead to very significant changes, especially in a few application areas. In the study; A certification diploma verification system has been developed using the decentralized, open-source blockchain platform. Thanks to the integration of blockchain technology with the document verification system, the centrality in the control mechanism can be eliminated and user initiative can be eliminated. In addition, the task of verifying documents in existing systems is a time-consuming process. Treatment can take up to several months, depending on the provider’s response. Thanks to the blockchain, employers or institutions that want to verify documents will be able to perform their transactions without spending time and money.Öğe Financial failure estimation in technology companies operating in Borsa İstanbul with logistics regression model(Altınbaş Üniversitesi, 2022) Korkmaz, Pınar; Karan, OğuzFinancial failure has been seen as the most critical threat to companies, investors and lenders for many years. With the impact of globalization in recent years, as well as the reflection of technological advances and financial conditions, it is seen that national and international sectors are rapidly differentiating and progressing. This difference and progress brings to the forefront the prediction of financial failures, mostly for companies. In this study, the concept of financial failure, types of financial failure, measures that can be taken to prevent financial failure, methods used to predict financial failure, financial technology, financial technology process, financial technology players and Borsa Istanbul concepts are explained conceptually. In the study, it is aimed to predict the failures of companies with financial data using logistic regression method. Ratios were created by collecting data from 27 technology companies traded in Borsa Istanbul. Unsuccessful companies were identified with 2021 data and financial data for the last three years. The data of the companies were primarily created according to 3-month periods, but as only the annual data of some companies for the years 2018 and 2019 could be accessed, it was decided to use annual data. The ratios determined for the years 2018, 2019 and 2020 were used as independent variables. When the ratios with missing data were removed, analysis was performed with 60 different ratios. Fixed Assets/Tangible Equity, Net Debt/EBITDA(Annual) and Total Debt/Equity ratios in predicting the financial failure of companies 3 years in advance, EBITDA/Growth (Annual) and Short Term Debt/Total Debt ratios in predicting 2 years in advance and 1 year in advance, Return on Equity/ROE and Short Term Debt/Growth ratios were found to be successful.Öğe Pre-processing techniques for movie review sentiment analysis : a comparative study for best feature set determination(Altınbaş Üniversitesi, 2022) Aly, Sohayla E.; Bayat, Oğuz; Duru, Adil D.Sentiment analysis is considered as the process to extract the overall expression, opinions, or feelings from reviews about something such as products, services, or movies. A pre-processing is considered as a crucial phase in sentiment analysis for text mining because it allows us to analyse the reviews according to its intended meaning by removing all of the appendages which are the words that do not affect the semantic from sentences. And therefore, the number of features will decrease and thus accuracy will increase. Accordingly, we have decided to evaluate our experiment in identifying the best influencing technique of pre-processing for several features through making a comparison between the features and by combining them together to reach the best result based on features number for each pre-processing technique and classification accuracy. this comparison was done by using three algorithms for classification SVM, NB and DT after applying tools for feature selection and feature extraction with three techniques for tokenization. We concluded that there are some of these techniques that have a negative effect like lemmatization and the part of them is not due to any difference, other, which is a little part, have an effectÖğe Eski eserlerin onarım ve güçlendirilmesinde yapılmış uygun olmayan yöntemler(Altınbaş Üniversitesi, 2022) Yıldırım, Y. Hazel; Kuruşçu, Ali OsmanAsırlar boyunca doğal ve yapay etkenlere maruz kalan tarihi yapılarda bu etkilere bağlı olarak zamanla birçok hasar oluşmaktadır. Bu hasarlar; oluştuğu yere, biçimine ve yapının genel özelliğine göre değişmekte olup yapıların zarar görmesine, yıkılmasına ve yok olmasına yol açar. Özellikle koruma ve müdahale aşamasında bu hasar biçimlerinin doğru bir şekilde yorumlanması gerekmektedir. Bilinçsiz ve yanlış tadilat, onarım ve güçlendirme girişimleri, yapılarda ciddi sorunlara neden olabilmektedir. Bu yüzden bu çalışma kapsamında tarihi yapılarda uygulanan onarım ve iyileştirme metotları incelenmiş olup bu bağlamda dünyadan örnek tarihi yapılarda uygulanan onarım ve güçlendirme yöntemlerinde yapılan uygun olmayan müdahaleler anlatılmıştır. Bu araştırmada, hasarlara müdahale ederken hasar nedenlerinin belirlenmesi gerektiği, birçok disiplinin bir arada çalışarak tercih edilen yapısal güçlendirme ve onarım uygulamalarının birçok analiz, deney ve testlerden geçmesi gerektiği gösterilmek istenmiştir.Öğe Supply chain risk management : Moroccan pharmaceutical sector case(Altınbaş Üniversitesi, 2022) Massmar, Adil; Arıkan, YıldızPharmaceutical systems are care settings characterized by the wide range of activities and scenarios with which they would be challenged. This causes interactions that result in unexpected scenarios associated with a variety of dangers such as variations in demand, risks associated with supplier relationships, and so on…. As a result, risk management appears to be a major issue for decision-makers. Today supply chain management needs to be dynamic and responsive to create added value, and mitigates these risks by using flexibility strategies to respond to change while remaining competitive. The goal of this research is to look into the supply and demand strategies used by pharmaceutical companies to respond to disruptions and avoid medicine interruptions for consumers. In this thesis the supply chain risk management strategies are basically connected to an empirical study done in 32 Moroccan pharmaceutical enterprises. Following that, the participants’ responses were based on a questionnaire structured through the literature seeks to bring more detailed information about these strategies. Accordingly, the results showed that Moroccan pharmaceutical firms focus on some crucial activities such as supplier selection, flexible control, supplier control, vendor verification, and inventory management to account for supply and demand risk. Empirical studies in the field of pharmaceutical risk management are rare. Thus, the goal of this work is address the scarcity of empirical studies in this field by outlining several key risk management strategies used by pharmaceutical supply chain laboratories in the context of Morocco which are putting more resources into these vital strategies. Most of the supply and demand techniques of these firms are found to be proactiveÖğe Full hareketli video oyunlarında etkileşim öğeleri(Altınbaş Üniversitesi, 2022) Kalender, Özgür; Uçan, BahadırÖzellikle son yıllar içerisinde artan interaktif medya üretimleriyle birlikte etkileşim teriminin kullanımı da büyük oranda artmıştır. Bu gelişmelerin ışığında multimedya, hipermedya, birleşik medya, bilgi otoyolu ve dijitalleşme gibi terimlerin kullanımında da artışlar gözlemlenmektedir. Tüm bu terimler, üretilen bir interaktif medya tasarımının yapısı olarak incelenebildiği gibi, bu tasarımın kullanıcı ile olan etkileşimi altında da incelenebilmektedir. 1980’lerin başında geliştirilen CD-ROM teknolojisi ile birlikte daha çok alana veri aktarma imkanı bulan tasarımcılar, pasif bir izleyiciyi aktif bir kullanıcıya dönüştüren Tüm Devinimli Video Oyunu üretimlerini arttırmışlardır. 1974 yılında Nintendo tarafından geliştirilen “Wild Gunman” bu tarz oyunların gelişmesi için ilk örnek olma özelliğini taşımaktadır. Özellikle kendi maceranı seç konseptini benimseyen tüm devinimli video oyunları, kullanıcılar ile birebir girdikleri etkileşim sayesinde kişisel seviyede bir deneyim ortaya çıkarmaktadırlar. Bu çalışma; Özgür Kalender’in Yıldız Teknik Üniversitesi İnteraktif Medya Tasarımı Yüksek Lisans Programı bünyesinde Doç. Dr. Bahadır Uçan danışmanlığında hazırladığı “Tüm Devinimli Video Oyunlarında Arayüz ve Anlatı Tasarımı İncelemesi” başlıklı tezinden türetilmiştir ve kullanıcı ile birebir etkileşim içerisinde bulunan ve kendi maceranı seç özelliği taşıyan tüm devinimli video oyunlarının etkileşim unsurlarına genel bir açıklama getirmek üzere düzenlenmiştir.Öğe Dimention analysis of bending perforated beams with the evolutionary topological optimization method(Altınbaş Üniversitesi, 2022) Çelik, Ender; Savaş, VedatThe aim of this study is to determine the optimal shape and clearance of the web openings in order to both increase the carrying capacity and decrease the weight of classic perforated beams by using evolutionary topological optimization technique. The effects of the optimal shape and web openings has been obtained by the application of the evolutionary topological optimization through finite elements method, and then the obtained optimal beam has been compared with widely used perforated beams in the market by using stress and displacement analysis. The designed beam seemed to have more advantages than the widely used ones in industry with a less weight and higher carrying capacity. With the topology optimization, the usual classic perforated beams’ geometry has been changed and stiffness was improved.Öğe Türkiye Feldspat madenciliğinin genel bir değerlendirmesi(Altınbaş Üniversitesi, 2022) Demir, Behzat Gökçen; Özdoğan, Ali Koray; Akbulut, AkınMadencilik, geçmişten günümüze uzanan tarihsel süreç boyunca insanlığın gelişimi için önemli bir faaliyet alanı olmuştur. Anadolu topraklarında gerçekleştirilen madencilik faaliyetlerinin de tarihte ayrı ve özel bir yeri vardır. Bugün, madenler ve madencilik hayatımızın birçok alanında yine ön plandadır. Feldspat mineralleri yerkabuğunda en bol bulunan mineral gruplarından birisi olmasına rağmen ticari/ ekonomik anlamda feldspat kazanımı/üretimi yapılan kaynak kayaç sayısı sınırlıdır. Türkiye’nin son yıllarda artan ihracat hacminin madencilik sektörü ihracatına olumlu katkıları olmuştur. Bu olumlu katkı, madenciliğin önemli alt kollarından biri olan feldspat madenciliğinin ihracat rakamlarının miktar ve değer yönünden artmasını sağlayan faktörlerden biri olarak değerlendirilebilir. Türkiye, dünya feldspat üretiminde son yıllarda ilk sırada yer almıştır. Feldspat minerallerinin ekonomik anlamda önemli rezerv bölgeleri ve madencilik alanlarının bulunduğu iller başta Aydın, Muğla ve Bilecik illeridir. Bu çalışmada, feldspat madenciliğinin genel bir değerlendirmesinin yapılması ve temel noktalarda bilgi verilmesi amaçlanmıştır.Öğe Evaluating sustainability aspects of housing in UNESCO world heritage city of Yazd case study : Lariha house(Altınbaş Üniversitesi, 2022) Beladi, Kimia; Karaman, AykutNowadays, reducing energy consumption and coexistence with natural and climatic conditions in the region has become one of the most prominent architectural goals. As a result of the growing population and the crisis created by rising energy demand, managing energy consumption patterns has become an essential component of sustainability. The traditional architecture of Iran is derived from the culture, tradition, customs and is unique to the climate of that region, which has caused the least use of non-renewable energy in the design and construction of its structure. Besides, simple and logical methods have provided the most use of renewable energy. As a result, this study explores the method of optimizing energy consumption in the housing sector through current native pattern designing in hot and dry regions with a specific emphasis on the relevance of energy savings. The case study of this research is Lariha House. It can be observed in the design concept of this house, the details such as wall thickness, placement of the building, the height of the internal structure, and other elements including plants, porches, wind flow and etc., directly influence optimizing energy usage.
