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Yayın EOQ model with transportation cost under deterministic demand(Işık Üniversitesi, 2012-12-24) Kars, Cihan; Altunbay, Seyhun; Işık Üniversitesi, Fen Bilimleri Enstitüsü, Endüstri Mühendisliği - Yöneylem Araştırması Yüksek Lisans ProgramıInventory planning issues are one of the most important aspects of the companies. To have optimal stock level both for production planning and low stock holding cost with successful demand forecast is also very important. If the companies work with high stock level, it causes the increase of the unused capital and it hinders to use the money for more effective operations. In global world, the companies purchase goods, semi-finished goods or materials from different regions of the world. They purchase the goods with variable quantities from different regions and directly affect the stock level of the companies. Furthermore it is essential to take transportation cost into account with the consumption quantity of material and the purchase price of unit material while determining inventory stock levels. There are also different payment options in purchasing of materials. The cash payment or the payment after receiving goods have also role in determining stock levels. When we take into account the transportation options and the payment options of purchasing materials the classical economic order quantity model is inadequate. The aim of this thesis is to have a new approach of economic order quantity model by considering the transportation cost and different payment options when we have deterministic demand. By the calculation of all possible transportation and payment alternatives, it becomes possible to find the optimum options of transportation and payment. The new model was implemented for a specific material of company X, for deterministic demand and the aim is to have optimal stock level for the specific material. The program MINITAB is used to find the appropriate method among different forecasting methods. The consumption of specific materials is evaluated and a sample group is composed to implement the new model. The all possible transportation modes, transportation durations and the historical demand data of 2010 and 2011 are collected and analyzed. Demand forecasting methods are applied on historical demand data and the results are accepted as deterministic and transportation modes and times are investigated in excel and used in problem. The process of the model is shown for the material WTR910R and the results are compared with the old system of company X.Yayın Evolving strategies for web crawler(Işık Üniversitesi, 2009-05-06) Küçük, Kamil; Perdahçı, Nazım Ziya; Işık Üniversitesi, Fen Bilimleri Enstitüsü, Enformasyon Teknolojileri Yüksek Lisans ProgramıWith the rapid growth of Internet and Internet-based information, it becomes the largest and publicly accessible data source in the world. Every day millions of information available so to achieve information becomes harder. To get the correct information trusted web sites and search engines are used. Trusted web sites have links between themselves, and users can reach correct and relevant information. Search engines are using crawler to follow links between pages. The context available to such crawlers can guide the navigation of links with the goal of efficiently locating highly relevant target pages. Crawler takes seed pages from search engines and follows these links using multi-agents. After first search, the results are inserted to database and they are used for seed pages for another search. The aim is the get access more reliable information using more seed pages in a short time.Yayın Author identification of newspaper columns using style and semantic features(Işık Üniversitesi, 2016-05-17) Yıldız, Ergin Doğan; Solak, Ercan; Işık Üniversitesi, Fen Bilimleri Enstitüsü, Bilgisayar Mühendisliği Yüksek Lisans ProgramıThis study has two major purposes : to implement and compare the author classification results of di erent Naive Bayes Classi ers, and to investigate whether merging individual methods will increase classi cation success or not. The subjects of this study were newspaper columnists. Data was collected from well known public newspapers. This study first investigates Numeric, Nominal, Multinominal NBC, and their various merged versions. We then address each method using cross-validation. The results of the experiments show that merging multiple classi cation methods can increase classifi cation success. Additionally, it depends on how well individual classifi cation models are constructed.Yayın Cluster based sensors scheduling in a target tracking application with particle filter method(Işık Üniversitesi, 2006) Özfidan, Özgür; Bayazıt, Uluğ; Işık Üniversitesi, Fen Bilimleri Enstitüsü, Elektronik Mühendisliği Yüksek Lisans ProgramıIn multisensor applications, management of sensors is neccessary for the classification of data they produce and for the efficient use of sensors as well. One of the most important aspects in sensor management is the sensor scheduling. By scheduling the sensors, serious redictions can be achieved in the cost of bandwith, power and computation. In this thesis, a simple solution for the problem of sensor scheduling in a multi-sensor target tracking application is presented. Proposed method is called sensor grouping. Due to non-linearity and non-gaussianity of the problem itself, proposed solution is presented in the framework of non-linear Bayesian Estimation. For this purpose a detailedtheoretical background of the theory of Bayesian Tracking and Particle Filtering algorithm is given.Yayın Factors encouraging and hindering a wider acceptance and more frequent utilization of mobile payment systems an empirical study among mobile phone subscribers in Turkey(Işık Üniversitesi, 2021-06-21) Coşkun, Ertan; Ferman, Murat; Işık Üniversitesi, Sosyal Bilimler Enstitüsü, Çağdaş İşletme Yönetimi Doktora ProgramıConsidering the technological development in mobile payment technology, and extensive literature of technology adoption models; the current state of the related field needs to be examined in more detail to better understand current situation. Such an investigation may be invaluable to enable further expansion, consumer acceptance, market adoption, and help to improve the existing platforms’ usability. This research deals with determining the factors that affect adoption of mobile payment technology among consumers, in Turkey. It seeks to find any patterns and connections that may be of aid in framing an implementation strategy for facilitating further adoption. It has gathered different definitions of “mobile payment” in literatüre and used a consumer side definition. This study offers a different perspective by grouping constructs from a broader literature and provides a mobile payment acceptance model based on the constructs used in other studies. Previous studies have been performed with small groups of respondents. This study aims to perform the research model in a cosmopolitan city (Istanbul) where all sorts of mobile payment options are available in the market and in the time of a pandemic when remote delivery and online purchases are widely preferred compared to offline alternatives. A survey is conducted among mobile phone subscribers in Istanbul, Turkey for primary data collection phase of this research. Istanbul is the city that holds the biggest population and has the highest amount of mobile phone subscribers in the country. Istanbul’s current population is more than 15.6million and mobile phone subscriptions are more than 22million as of 2019. Survey responses have been analysed with structural equation modeling and results are presented in the corresponding sections. Empirical findings of the research show that factors such as usefulness, security, social influence, ease of use, enjoyment and innovativeness have positive effects on use of mobile payments among consumers. Factors such as attractiveness of alternatives and new technology anxiety have negative effects on use of mobile payments. This study has also discovered that intention to use mobile payments differ among demographic parameters such as education level and gender of respondents.Yayın Emerging technologies and international security: machines, the state, and war(Işık Üniversitesi Yayınları, 2023-10-25) Albasar, İlgi DoğaHalf a century ago, due to rapidly advancing technological developments, one of the most cliché future predictions we saw in scientific magazines was the idea of the sky being filled with flying cars. While the concept of flying cars may not have come to fruition yet, thanks to artificial intelligence, at least we can now listen to Kim Jong-Un singing English Disney songs. Although this may be a humorous example, in a more grim manner, autonomous drones that cause civilian casualties in covert assassination missions can also be given as an example.Yayın The risk perception of it outsourcing in Turkey(Işık Üniversitesi, 2013-08-28) Bingöl, Erdem; Sevgi, Cüneyt; Işık Üniversitesi, Fen Bilimleri Enstitüsü, Enformasyon Teknolojileri Yüksek Lisans ProgramıThe competition in today's business is getting stronger each day. Due to its proven cost reduction potential the usage of Information Technology (IT) outsourcing and the flexibility it provided are among the attractive and effective features to both SMEs (Small Medium enterprises) and large enterprises. Most enterprises with different sizes decide to transfer some or all of their IT services to outsourcing vendors. Implementing IT outsourcing has some advantages such as decreasing time required to enter a market, increasing quality, enhancing customer satisfaction, and allowing an organization to focus on its core areas. However, the use of IT outsourcing comes with many risks which need to be carefully evaluated before any engagement. This thesis surveys the recent literature for the most important risk factors inherent to the IT outsourcing such as increase in expenses, increased dependence on outsourcing firm, confidentiality and communication problems, etc. Herein, we focus on identifying the IT outsourcing usage characteristics and understanding the perception of IT outsourcing risk factors by conducting a survey in both IT companies and IT departments of the companies in Turkey. The conducted data obtained by the survey is used to discover the variance among the management levels of IT personnel, in the perceived factors that may lead to IT outsourcing risks. We analyze the survey data and portrayed the current situation of risks of IT outsourcing perceived by IT practitioners in Turkey.Yayın SMS distribution and information system(Işık Üniversitesi, 2003-07) Yüzücü, Haluk; Yarman, Bekir Sıddık Binboğa; Işık Üniversitesi, Fen Bilimleri Enstitüsü, Bilgisayar Mühendisliği Yüksek Lisans ProgramıIn this master's thesis, a web based application software package is developed using a mobile terminal (Siemens M20), for sending SMS message to individuals or groups to disseminate information to cellular-phones. Employing utilizing the S/W developed in this thesis, SMS messages are sent to cell-phones via internet and users will get information using their cell-phone (Eg: for attendance, exam results, seminar days, etc..). Microsoft SQL Server Database is used for storing the user information, incoming and outgoing messages. ASP (Active Server Page) programming language is utilized for web based interface coding. The application software is developed on Siemens M20 mobile terminal device. Mobile communication has become an indispensable parts of everyone's daily life. This project, which has been developed by using SMS service, a branch of mobile communication, aims to enable people to access information with their cell-phones, when there is no internet. With this package institutions will be able to send announcements to groups of individuals as short messages at the same time. Besides these, with the developed web interface, SMS message will be sent only through cell-phones, but through internet as well.Yayın Some results on a subclass of multivalent harmonic mappings(Işık Üniversitesi, 2015) Öztürk, Durdane; Aydoğan, Seher Melike; Işık Üniversitesi, Fen Bilimleri Enstitüsü, Matematik Yüksek Lisans ProgramıIn this thesis, the fundamental function classes and their properties are introduced. Some results that we can generalize to multivalent functions are obtained. Next, as the main part of the study, a new subclass of sense-preserving multivalent harmonic mappings in the open unit disc is defined. Furthermore, distortion inequalities and growth theorems for the functions of this new class are determined.Yayın Data access layer code generator(Işık Üniversitesi, 2006) Küçükeren, Gökçe; Kuru, Selahattin; Işık Üniversitesi, Fen Bilimleri Enstitüsü, Bilgisayar Mühendisliği Yüksek Lisans ProgramıLayering techniques are commonly used in order to supply the operational requirements of today's complex enterprise applications. The codes developed for the Data Access Layer (DAL), which is the foundation of most layered applications, increases the time of projects' development phases, and the bugs in these manually written codes makes the data access unreliable. In this thesis, a tool is developed to generate the required codes for DAL. The automatically generated codes using this tool, Data Access Layer Code Generator, decreases the time wasted for DAL development and makes the data access reliable due to their uniform structure. Data Access Layer Code Generator is able to build the foundation of the layered architectures with its user-friendly interfaces integrated on the development platform and with the functionalities provided to the developers.
