Error Rate Analysis of GF(q) Network Coded Detect-and-Forward Wireless Relay Networks Using Equivalent Relay Channel Models

This paper investigates simple means of analyzing the error rate performance of a general q-ary Galois Field network coded detect-and-forward cooperative relay network with known relay error statistics at the destination. Equivalent relay channels are used in obtaining an approximate error rate of the relay network, from which the diversity order is found. Error rate analyses using equivalent relay channel models are shown to be closely matched with simulation results. Using the equivalent relay channels, low complexity receivers are developed whose performances are close to that of the optimal maximum likelihood receiver.Comment: 28 pages, 10 figures. This work has been submitted to the IEEE for possible publication. Copyright may be transferred without notice, after which this version may no longer be accessibl

New Space: The European Union's Evolving Space Policy and Changing European Space Ecosystem

Throughout the years, the identity and institutional capacity of the European Union (EU) has changed. As a global actor in international politics, the EU has perceived the need for developing a comprehensive space policy perspective. This perspective has evolved by the changing dynamics of the space ecosystem i.e., "New Space", and it is a phenomenon that consists of new business models, new technologies, new markets, new value chains, and new actors. New actors in space activities have drastically altered the dynamics of space activities. This paper aims to examine the new actors in the context of European space governance, and scrutinise the tendencies of space companies so as to develop a better understanding of the European space system. The article concludes that, being aware of the undeniable importance of space applications and the security of space systems, the EU attaches importance to catching the "New Space" trend in its governance structure and encouraging appropriate changes in the sector

Analyzing competitiveness of automotive industry through cumulative belief degrees

Ülengin, Füsun (Dogus Author) -- Önsel, Şule (Dogus Author) -- Kabak, Özgür (Dogus Author) -- Conference full title: 10th International Fuzzy Logic and Intelligent Technologies inNuclear Science Conference, FLINS 2012; Istanbul; Turkey; 26 August 2012 through 29 August 2012This study aims to analyze the automotive industry from competitiveness perspective using a novel cumulative belief degrees (CBD) approach. For this purpose, a mathematical model based on CBD is proposed to quantify the relations among the variables in a system. This model is used to analyze the Turkish Automotive Industry through scenario analysis.SEDEFED (Federation of Industrial Associations), REF (TÜSİAD Sabanci University Competitiveness Forum), and OSD (Automotive Manufacturers Association

Determination of Compatibility of Some Biodiesel Properties Produced under Turkey Conditions to Standards and Effects of Fuel Spraying Amount

Bu çalışmada, ülkemizde üretilen biyodizelin reolojik özelliklerinden biri olan viskozite değerleri ve bunun yanında motor performans eğrilerine doğrudan etkili olan özelliklerden biri olan özgül ağırlık değerleri saptanmıştır. Bu değerlerin standartlara uygunluğu incelenmiştir. Sıcaklığın viskozite değişimleri üzerine etkilerinin belirlenmesi amacıyla 20 ve 40 °C olmak üzere iki farklı sıcaklıkta viskozite ölçümleri gerçekleştirilmiştir. Standartlara uygun şekilde özgül ağırlık değerleri de 15 °C’ de belirlenmiştir. Bu çalışma, piyasadan toplanan ve kullanımda olan 8 adet biyodizel numunesi (4’ü Sanayi Ticaret İl Müdürlüklerine kayıtlı, diğer dördü ise kayıtlı değildir) ve karşılaştırma yapabilmek amacıyla da 1adet motorin numunesi kullanılarak gerçekleştirilmiştir. Viskozite ve özgül ağırlık ölçümlerinin yanı sıra farklı marka traktör motorlarında yaygın olarak kullanılan 3 farklı tip enjektör kullanılarak, viskozite ve özgül ağırlık değişimlerinin enjektörlerden püskürtülen yakıt miktarı üzerine ve püskürtülen yakıtın yanma odası içerisindeki dağılımına etkileri de belirlenmiştir. Yanma odası içerisindeki yakıt dağılımını saptamak amacıyla traktör motorundaki yanma odası ile aynı ölçülere sahip bir yanma odası modeli oluşturulmuştur. Araştırma sonuçlarına göre, örneklerin sıcaklık değerlerinin artmasıyla viskozite değerlerinin oldukça düştüğü saptanmıştır. Kayıtlı olan firmalara ait örneklerde dahil olmak üzere biyodizellerin büyük çoğunluğunda viskozite ve özgül ağırlık değerlerinin standart dışı olduğu belirlenmiştir. Yüksek özgül ağırlık ve viskoziteden dolayı püskürtülen yakıt miktarı tüm biyodizel örnekleri ve enjektörler için motorine kıyasla daha yüksek bulunmuştur. Yanma odası içerisindeki dağılıma göre en yüksek yakıt miktarı 9 numaralı yüksek viskoziteli biyodizel örneğinde saptanmıştır. Motorin yanma odasında biyodizel örneklerine göre daha uzak bölgelere püskürtülmüş ve dağılımın daha homojen olduğu saptanmıştır.In this study, viscosity values that is one of the rheological properties of biodiesel samples that have been produced under Turkey conditions. In addition to this, specific weight values that are effective on directly to engine performance curves were also determined. Compatibility of these values to standards were examined. Kinematic viscosity measurements at two different temperatures namely 20 and 40 °C were carried out to determine the effect of temperature on viscosity change. Density measurements according to the standard at 15 °C was also set. In this study, eight biodiesel samples were collected from markets (4 of them are enrolled to Industry and Commerce provincial Directorates, the other four are not registered), and 1 diesel sample as comparison sample were used. In addition to viscosity and specific weight measurements, effect of viscosity and specific weight changes on the amount of fuel sprayed from injector by using 3 different types injectors that are used in different brand widely used tractor engines was determined. In addition to these effects of fuel with different density and viscosity on distribution of sprayed fuel in combustion chamber was determined by manufacturing a model combustion chamber that has identical with tractor combustion chambers. According to research results, increasing of the temperature decreased the viscosity values highly. Including the registered samples, in the great majority of biodiesel samples viscosity and specific weight values were determined to be non-standard. Due to high specific weight and viscosity, amount the sprayed fuel were found higher for all injector and biodiesel samples compared to sprayed diesel amount. According to distrubition in combustion chamber, the highest fuel amount was found for biodiesel 9 that has the maximum viscosity. Diesel was spryed the furthest points in combustion chamber and its distribution was found more homogenity compared with those biodiesel samples

The relationships between emotional intelligence, career adaptation and life satisfaction: A research on the employees working in tourism sector

Amaç – Bu araştırma turizm sektöründe çalışan personelin duygusal zekalarının kariyer uyumlarını ne derece etkilediğini belirlemek amacıyla yapılmıştır. Ayrıca kariyer uyumlarının yaşam doyumlarına etkisi de araştırma kapsamında incelenmiştir. Yöntem – Araştırma amacına bağlı olarak veriler anket tekniğiyle Kapadokya bölgesindeki turizm işletmelerinde çalışan personelden toplanmıştır. Araştırmadan elde edilen veriler AMOS programı kullanılarak analiz edilmiştir. Bulgular – Araştırma sonuçlarına göre, turizm çalışanlarının duygusal zekalarının kariyer uyumlarını pozitif yönde etkilediği tespit edilmiştir. Ayrıca, çalışanların kariyer uyumları da yaşam doyumlarını pozitif yönde etkilemektedir. Tartışma – Çalışmadan elde edilen sonuçlara bağlı olarak alan yazında çalışan akademisyenlere ve sektör yöneticilere öneriler geliştirilmiştirPurpose – This research was carried out to determine to what extent the emotional intelligence of the staff working in tourism sector affects their career adaptation. In addition, the effect of career adaptations on life satisfaction was also examined within the scope of the research. Design/methodology/approach – Depending on the purpose of the research, the data were collected from the personnel working in tourism businesses in the Cappadocia region using the survey technique. The data obtained from the research were analyzed using the AMOS program. Findings – According to the results of the research, it has been determined that the emotional intelligence of tourism workers positively affects their career adaptation. What’s more, the career adaptations of employees increase their life satisfaction. Discussion – Based on the results obtained from the study, suggestions have been developed for sector representatives and academicians who are working in the literature

A decision support methodology to enhance the competitiveness of the Turkish automotive industry

This is the post-print (final draft post-refereeing) version of the article. Copyright @ 2013 Elsevier B.V. All rights reserved.Three levels of competitiveness affect the success of business enterprises in a globally competitive environment: the competitiveness of the company, the competitiveness of the industry in which the company operates and the competitiveness of the country where the business is located. This study analyses the competitiveness of the automotive industry in association with the national competitiveness perspective using a methodology based on Bayesian Causal Networks. First, we structure the competitiveness problem of the automotive industry through a synthesis of expert knowledge in the light of the World Economic Forum’s competitiveness indicators. Second, we model the relationships among the variables identified in the problem structuring stage and analyse these relationships using a Bayesian Causal Network. Third, we develop policy suggestions under various scenarios to enhance the national competitive advantages of the automotive industry. We present an analysis of the Turkish automotive industry as a case study. It is possible to generalise the policy suggestions developed for the case of Turkish automotive industry to the automotive industries in other developing countries where country and industry competitiveness levels are similar to those of Turkey

International competitiveness power and human development of countries

Human development should be the ultimate objective of human activity and its aim should be healthier, longer, and fuller lives. It is expected that if the competitiveness of a country is suitably managed, human welfare will be enhanced as a consequence. The research described here seeks to explore the relationship between the competitiveness of a country and its use for human development. For this purpose, 45 countries were evaluated using data envelopment analysis, where the global competitiveness indicators are taken as input variables and the human development index indicators as output variables. A detailed analysis is also conducted for the emerging economies

Effectiveness of tranexamic acid on bleeding in conization

Objective: Bleeding is the most common complication of conization of cervix. Hemostatic sutures, intraoperative ferric subsulfate, or vasopressin can be used when intraoperative bleeding occurred, whereas oral tranexamic acid (TA) may be used for post-operative bleeding. In this study, we aimed to find out whether intraoperative cervical TA administration in patients undergoing conization caused changes in the amount of intraoperative bleeding and post-operative hemogram. Material and Methods: Patients who have undergone cervical conization between January 2019 and July 2019 in Zeynep Kamil Health Application and Research Center Gynecological Diseases and Birth Clinic were evaluated. One hundred and five patients were included to our study. One ampoule of 10% TA was applied cervically to 47 of these patients. Both groups were evaluated in terms of measuring the intraoperative amount of blood in the aspirator, changes in post-operative hb/htc/plt values compared to the pre-operative values, and the rate of post-operative bleeding. Results: In our study, the amount of intraoperative hemorrhage and pre-operative hemoglobin, hematocrit, and platelet values compared to the post-operative values were found to be similar in both groups. Conclusion: Although TA has been shown to be effective on hemorrhage in benign gynecologic operations, menorrhagia, and postpartum hemorrhages, no significant effect on hemorrhage in conization with cervical TA administration has been demonstrated

Are road transportation investments in line with demand projections? A gravity-based analysis for Turkey

This is the post-print version of the article which has been published and is available at the link below.In this research, an integrated gravity-based model was built, and a scenario analysis was conducted to project the demand levels for routes related to the highway projects suggested in TINA-Turkey. The gravity-based model was used to perform a disaggregated analysis to estimate the demand levels that will occur on the routes which are planned to be improved in specific regions of Turkey from now until 2020. During the scenario development phase for these gravity-based models, the growth rate of Turkey's GDP, as estimated by the World Bank from now until 2017, was used as the baseline scenario. Besides, it is assumed that the gross value added (GVA) of the origin and destination regions of the selected routes will show a pattern similar to GDP growth rates. Based on the estimated GDP values, and the projected GVA growth rates, the demand for each selected route was projected and found that the demand level for some of these road projects is expected to be very low, and hence additional measures would be needed to make these investments worthwhile

A decision support system to evaluate the competitiveness of nations

The measurement of competitiveness and strategy development is an important issue for policy makers. The aim of this paper is to explore methodological transparency as a viable solution to problems created by existing aggregated indices as well as to conduct a detailed analysis on the ongoing performance of nations’ competitiveness. For this purpose, a methodology composed of three steps is used. To start, a combined clustering analysis methodology is used to assign countries to appropriate clusters. In current methods, country clustering is generally based on GDP. However, we suggest that GDP alone is insufficient to define the stage of competitiveness a country belongs. In the proposed methodology, 135 criteria are used for a proper classification of the countries. Relationships between the criteria and classification of the countries are determined using Artificial Neural Networks (ANNs). ANN provides an objective method for determining the attribute/criteria weights, which are, for the most part, subjectively specified in existing methods. Finally, in the third step, the countries of interest are ranked based on weights generated in the previous step. Beyond the ranking of countries, the proposed methodology can also be used to identify those attributes that a given country should focus on in order to improve its position relative to other countries, i.e., to transition from its current cluster to the next higher one. As a final analysis, the dynamic change of the rank of the countries over years has also been investigated