Meltem Ozturan
Bogazici University, Management Information Systems, Faculty Member
The impact of social media on society has been growing fast, especially in the information era. While there are several studies in the literature that show the effect of social media on society, the least touched point is about the effect... more
The impact of social media on society has been growing fast, especially in the information era. While there are several studies in the literature that show the effect of social media on society, the least touched point is about the effect of social events on social media. Since the relation of social events and social media is not in one direction, this study aims to find the reaction behaviors of social media users for positive and negative events in society. Sentiments of approximately 5 million tweets of 5000 users filtered from 127 thousand were analyzed and the results showed that most positive and negative days of 2015 and first quarter of 2016 in Turkey were detected by this sentiment analysis with 69.05% accuracy. Also in this study, the effects of those social events on social media were examined in terms of reaction speed. As a result, 4 main social media reaction types were classified as “sudden impact-sudden fall”, “normal distribution”, “hear, ask, prove, react” and “on...
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Even though there is a growing reliance on the Internet for the promotion and sale of tourism products and services, companies' utilization of web sites is still not widespread. Consequently, web site evaluation frameworks are... more
Even though there is a growing reliance on the Internet for the promotion and sale of tourism products and services, companies' utilization of web sites is still not widespread. Consequently, web site evaluation frameworks are relatively limited. The objective of this paper is to analyze the content of the web sites of Turkish travel agencies in order to determine their adoption level of the Web as a tool of e-business. For this purpose, the authors have developed a framework based on different models available in the literature. The data was collected from 150 travel agencies by using an on-line questionnaire. The results of the survey show that most of the travel agencies that have a web site do not take full advantage of the e-business capabilities of the Internet. Almost all the respondents use their web sites to provide basic corporate information and basic product/service information, which do not require interactivity.
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... Search result page. Title: BÜSYAT Periodicals Retrieval System BÜSYAT Süreli Yayın Sorgulama Sistemi. Author: Meltem Özturan ; Nuri Başoğlu ; Bekir Kara. ... Ancak, diğer taraftan hızlandırıcı ve kolaylaştırıcı özelliği olan... more
... Search result page. Title: BÜSYAT Periodicals Retrieval System BÜSYAT Süreli Yayın Sorgulama Sistemi. Author: Meltem Özturan ; Nuri Başoğlu ; Bekir Kara. ... Ancak, diğer taraftan hızlandırıcı ve kolaylaştırıcı özelliği olan bilgisayarlar pek çok alanda kullanılmaktadır. ...
One of the great threats of earthquakes is soil liquefaction which can put many lives in danger and damage important structures. The evaluation of soil liquefaction potential is of great importance for geotechnical engineers in order to... more
One of the great threats of earthquakes is soil liquefaction which can put many lives in danger and damage important structures. The evaluation of soil liquefaction potential is of great importance for geotechnical engineers in order to avoid future costs. The most common approach for such an evaluation has been using historical records of soil liquefaction, gathered from different locations. Most of the historical records include SPT and CPT data. This paper focuses on the evaluation of liquefaction potential using shear wave velocity (SVW) database, including 415 site observations. Among many models for liquefaction potential assessment, ANN and SVM are popular and used by different researchers to better predict the future hazards of liquefaction. In this paper, we introduce Random Forest as a method for liquefaction assessment to classify soils with respect to their potential of liquefaction when exposed to certain earthquakes. The details of feature selection and model development is stated. It is shown that Random Forest, tested on 83 unseen cases (20% of database), is able to predict the liquefaction potential in soils with 92.77% accuracy. Also, Random Forest can provide the relative importance of the predictors, among which the normalized shear wave velocity (Vs1) obtained the highest significance score for liquefaction potential prediction.
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As organizations’ investments on information systems/information technology (IS/IT) increase, the assessment methods used during IS/IT investment decision-making process holds more and more importance. Since successful IS/IT projects are... more
As organizations’ investments on information systems/information technology (IS/IT) increase, the assessment methods used during IS/IT investment decision-making process holds more and more importance. Since successful IS/IT projects are key to the sustainability of an organization, identifying the factors which have effects on project success carries useful insights. In this study, 18 assessment methods are identified based on the literature. A novel classification method is proposed and assessment methods are classified into financial, strategic, and organizational categories. A novel rule-based method for determining the size of IS/IT projects is also proposed. Detailed information on project characteristics, employed IS/IT assessment methods, and project success is collected for 110 real-world IS/IT projects. The collected data is utilized in ANOVA and Regression tests to examine the factors which affect project success. Use of organization-related assessment methods, which is p...
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Recently, it is inevitable that businesses invest in many information system (IS) projects in order to gain a competitive advantage within the internal industry and global environment. The important point is the selection of the... more
Recently, it is inevitable that businesses invest in many information system (IS) projects in order to gain a competitive advantage within the internal industry and global environment. The important point is the selection of the appropriate IS environment, hence the optimal IS investment methods with respect to changing technological needs. In this respect, both empirical and conceptual studies are reviewed to identify the relevant IS/IT investment methods. After an extensive literature review, 51 relevant articles are identified. The IS/IT investment methods studied in these articles are classified and examined within the three categories: financial, non-financial, and hybrid. The results reveal that most of studies focus on a mixed usage of financial and non-financial methods called hybrid methods, whereas financial methods are used more frequently when compared to non-financial methods during the selected research period. On the other hand, the usage of pure financial methods dec...
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A Geographic Information System (GIS) is defined as a computer based tool useful for capturing, storing, retrieving and manipulating, displaying and querying both spatial and non-spatial data about given areas to generate various planning... more
A Geographic Information System (GIS) is defined as a computer based tool useful for capturing, storing, retrieving and manipulating, displaying and querying both spatial and non-spatial data about given areas to generate various planning scenarios for decision making. On the other hand, an Urban Management Information System (UMIS) is an economic resource that can benefit decision makers in the planning, development, and management of urban projects and resources using statistical data such as social, economic, demographic, housing and health data. Since Internet technology reduces the cost of data management and information distribution to mass usages as in UMIS, web based systems are mostly used for a UMIS applications throughout the world. Nowadays, the number of satellite cities is rapidly increasing in Turkey, especially in Istanbul. A satellite city for Istanbul can be defined as a mini city established outside Istanbul that has its own shopping centers, schools, social clubs...
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Bu calismanin uc farkli amaci vardir; oteller ve derecelendirmeleri hakkinda bazi bilgileri kesfetmek, musterilerin eWOM yorumlari icin duygu analizi ile yildiz derecelendirmelerini tahmin etmek ve bu eWOM yildiz derecelendirmelerini... more
Bu calismanin uc farkli amaci vardir; oteller ve derecelendirmeleri hakkinda bazi bilgileri kesfetmek, musterilerin eWOM yorumlari icin duygu analizi ile yildiz derecelendirmelerini tahmin etmek ve bu eWOM yildiz derecelendirmelerini istatistiksel analizlerle soz konusu yorumlara karsilik gelen cevrimici yildiz derecelendirmeleriyle karsilastirmaktir. Farkli gelir seviyesine sahip dort ildeki otel verileri PHP ile yazilmis bir program kullanilarak toplanmistir. Veriler cesitli kurallar goz onunde bulundurularak temizlenip, analizlere hazir hale getirilmistir. Lexalytics aracinin akademik demo surumu, duyarlilik analizi, RStudio ise istatistik analizler icin kullanilmistir. Sonuclar, otel basina ortalama oda sayisinin ve gunluk ortalama otel ucretlerinin illerin gelir duzeyi arttikca arttigini, otellerin yildiz puanlarinin ise illerin gelir duzeyi azaldikca arttigini gostermektedir. Analizler tum iller icin eWOM ve cevrimici yildiz derecelendirmeleri arasinda anlamli bir fark oldugun...
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This research focuses on the assessment of blockchain technology readiness level of banking industry. Firstly, blockchain technology is defined and its specifications have been highlighted. Secondly the answer for the question how the... more
This research focuses on the assessment of blockchain technology readiness level of banking industry. Firstly, blockchain technology is defined and its specifications have been highlighted. Secondly the answer for the question how the domains of information systems integration are related to the areas of adoption of blockchain technology is researched. Then the readiness level for blockchain technology is defined in conjunction with adoption theories and its similarities with the factors in the domains of information systems. As a case study Turkish banking industry has been reviewed and the results are discussed to give an idea about the readiness of Turkish banking industry for blockchain technology.
Increase in processing, communication and integration capabilities of information systems also benefited capital markets as much as other financial services. Exchanges and post-trade service firms widely recognize the fact that the speed... more
Increase in processing, communication and integration capabilities of information systems also benefited capital markets as much as other financial services. Exchanges and post-trade service firms widely recognize the fact that the speed and integrity demands of the investors are more easily satisfied by integrating the heterogeneous systems. This research aims to propose a three stage roadmap to explore the possibilities of achieving a higher level of integration between the three main actors of the capital markets of Turkey; namely Borsa Istanbul Inc. that is responsible for order collection, order matching and execution, Takas bank that provides settlement, clearing and custody services within Turkish capital markets, and Central Registry Agency Inc. which is the central securities depository institution of Turkey. This three stage roadmap includes establishment of a capital markets technology firm, unification of application portfolios and unification of data centers.
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Coklu sunu ortamlarinin etkin kullanimi icin yeni kullanici arayuzleri tasarlanmali ve gelistirilmelidir. Bu yazinin amaci, coklu sunu ortamlari icin var olan tasarim yol gostericilerini sunmak, tasarim sureci icinde kullanicilar ile... more
Coklu sunu ortamlarinin etkin kullanimi icin yeni kullanici arayuzleri tasarlanmali ve gelistirilmelidir. Bu yazinin amaci, coklu sunu ortamlari icin var olan tasarim yol gostericilerini sunmak, tasarim sureci icinde kullanicilar ile denenmesi gereken tasarim konularini belirlemek, bu amaci gerceklestirmek uzere hazirlanan deneme ortamini tanimlamak, ve kullanicilar ile yapilan deneme ile ilgili sonuclari sunmaktir. Yapilan test sonuclari gostermektedir ki var olan yolgostericileri kullanmak gerekli ama yeterli degildir.
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With the increased usage of Internet and high penetration of electronic devices, online advertising begin to receive great attention from the business world as well as academic environment. The main purpose of this study is to examine... more
With the increased usage of Internet and high penetration of electronic devices, online advertising begin to receive great attention from the business world as well as academic environment. The main purpose of this study is to examine Turkish consumers’ beliefs about online advertising, and investigate the relationship between beliefs about online advertising and attitudes towards online advertising. Secondly, we’ve explored whether there is a relationship between consumers’ attitudes towards online advertising and their behavioral responses. After conducting a factor analysis, it is found that Turkish consumers’ beliefs about online advertising can be grouped under four main dimensions, respectively, functionality, customization, credibility, and controllability. Results of the correlation analyses indicate that attitudes towards online advertising are found to be positively correlated in a statistically significant manner with all four belief factors. It is also discovered that th...
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Due to the increase in the share of online advertising out of total advertising market, beliefs about online advertising, especially about the companies using it, have become important for assigning marketing strategies. The main... more
Due to the increase in the share of online advertising out of total advertising market, beliefs about online advertising, especially about the companies using it, have become important for assigning marketing strategies. The main objectives of this study are to explore Turkish consumers' beliefs about the companies using online advertising, to seek whether there are relationships between consumers' demographic characteristics and these beliefs, and to examine the effects of these beliefs on consumers' behavioral responses. Results indicate that beliefs of Turkish consumers about companies using online advertising a) are more favorable as compared to companies not using it, b) have relationships between consumers' personal monthly income and Internet usage experience, and c) are different for consumers with different online ad clicking frequencies.
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PurposeThe purpose of this paper is twofold. First, to study collaborative research in general and identify its characteristics, advantages and disadvantages by conglomerating various views and ideas from the literature and from expert... more
PurposeThe purpose of this paper is twofold. First, to study collaborative research in general and identify its characteristics, advantages and disadvantages by conglomerating various views and ideas from the literature and from expert opinion research. Second, to determine the importance of and attitudes toward the usage of information technology (IT) in collaborative research projects.Design/methodology/approachInitially, an extensive literature review and ten in‐depth interviews have been conducted to determine the identifying characteristics of collaborative research. Consequently, a questionnaire is used as the major data collection tool to assess academicians' opinions about collaborative research and attitudes toward IT utilization in such studies.FindingsCollaborative research has been most distinctively defined with the concepts of teamwork, knowledge and experience sharing and direct and continuous communication. Increased visibility and recognition of such projects an...
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... In the tourism field this means that facilities such as hotels or train seats can be booked directly by consumers, and paid by means of credit or charge card (Beaver 1992). ... For hotels, judgment sampling was used and all hotels... more
... In the tourism field this means that facilities such as hotels or train seats can be booked directly by consumers, and paid by means of credit or charge card (Beaver 1992). ... For hotels, judgment sampling was used and all hotels except one-star hotels were selected. ...
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... July 13-14 2009, Crowne Plaza Hotel, Izmir Ibrahim Kanalici, Asli Sencer Erdem and MeltemOzturan. ... Meltem Ozturan, Department of Management Information Systems, Bogazici University, Istanbul, Turkey meltem.ozturan@boun.edu.tr... more
... July 13-14 2009, Crowne Plaza Hotel, Izmir Ibrahim Kanalici, Asli Sencer Erdem and MeltemOzturan. ... Meltem Ozturan, Department of Management Information Systems, Bogazici University, Istanbul, Turkey meltem.ozturan@boun.edu.tr Abstract ...
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The purpose of the study is to analyze e-government implementation and effectiveness at the municipal level in the vision of information system (IS) integration and to propose a roadmap for an integrated information system (IIS) for... more
The purpose of the study is to analyze e-government implementation and effectiveness at the municipal level in the vision of information system (IS) integration and to propose a roadmap for an integrated information system (IIS) for municipalities from the citizens' perspective. Integration models proposed in the literature are reviewed and merged into a more comprehensive model. Based on the proposed model, integration process occurs under four domains: strategic, organizational, logical and physical. Related approaches of hierarchy, structure, direction and extent are analyzed and evaluated for each domain. Then, IS practices for seven different municipalities are examined and compared to each other so as to evaluate the current situation. At the final stage, a practical structural framework is developed and presented. As a result of the longitudinal interviews with Sarıyer Municipality, the general framework and a roadmap for municipalities are put forward. While this roadmap can be extended further by other researchers, it can also act as a base for practitioners to develop integrated information systems (IIS) for citizen services offered local governments.
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Nowadays, universities are highly in need of an integrated university information system (IUIS) to increase the efficiency and effectiveness of the business processes in university administration which are eventually getting complicated... more
Nowadays, universities are highly in need of an integrated university information system (IUIS)
to increase the efficiency and effectiveness of the business processes in university administration
which are eventually getting complicated due to increase in student enrollment. In this study, it is
aimed to propose a roadmap for an IUIS based on strategic, logical, physical, and organizational
connectivity issues to fulfil this need. For this purpose, firstly literature survey has been done on
connectivity issues and best practices of IUISs. Afterwards, a university in Turkey has been
analyzed in detail and a roadmap for an IUIS is proposed as a case study. The IUIS in the
proposed roadmap consists of various subsystems that are integrated through a platform. All the
subsystems on this IUIS platform communicate with each other via web services and this
platform is accessed by users through a portal. As the output of this study, the roadmap for an
IUIS is recommended and explained in detail under the four connectivity issues.
to increase the efficiency and effectiveness of the business processes in university administration
which are eventually getting complicated due to increase in student enrollment. In this study, it is
aimed to propose a roadmap for an IUIS based on strategic, logical, physical, and organizational
connectivity issues to fulfil this need. For this purpose, firstly literature survey has been done on
connectivity issues and best practices of IUISs. Afterwards, a university in Turkey has been
analyzed in detail and a roadmap for an IUIS is proposed as a case study. The IUIS in the
proposed roadmap consists of various subsystems that are integrated through a platform. All the
subsystems on this IUIS platform communicate with each other via web services and this
platform is accessed by users through a portal. As the output of this study, the roadmap for an
IUIS is recommended and explained in detail under the four connectivity issues.
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Research Interests: Finance, Cognitive Science, Machine Learning, Data Mining, Stock Market, and 16 moreGenetic Algorithm, Mean square error, Multi-layer Perceptron, Exchange rate, Network Architecture, STOCK EXCHANGE, Moving average, Central Bank, Inflation and Stock Market Returns, Interest Rate, Istanbul Stock Exchange, Indexation, Artificial Neural Network, Feed-Forward, Feature Space, and Prediction Accuracy
This study seeks to shed light upon the strategic value of information technology (IT) investments. Previous literature suggests that IT investments per se are not sufficient for improving firm performance. Drawing from the resource-based... more
This study seeks to shed light upon the strategic value of information technology (IT) investments. Previous literature suggests that IT investments per se are not sufficient for improving firm performance. Drawing from the resource-based view, it is hypothesized in this study ...