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Search Results: 1 - 10 of 483 matches for " Cem Alppay "
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Use of the AHP Methodology in Vehicle Design Process Dynamics: Determination of the Most Effective Concept Phases for the New Automotive Product  [PDF]
Fuat Ali Paker, Cem Alppay, Begüm Sertye?ili?ik
Journal of Transportation Technologies (JTTs) , 2018, DOI: 10.4236/jtts.2018.84017
Abstract: The function of decision-making in the management of new product development and vehicle design activities is achieved by defining, constructing or evaluating the outcome-oriented, and most effective steps from the sub-steps that form this basic process. The choice of the sub-stages of the basic process or the decision of how to do a job gains importance in terms of the efficiency of the firm’s activities. Therefore, the decision making function is one of the basic elements involved in the formation and development of the basic processes that can comply with the market dynamics of firms. With the new product being developed, the selection, the current editing or the evaluation of the steps that make up the vehicle design activities for the automotive industry companies that exist and compete in the market, bring about significant gains. In the manufacturing industry, the design of the vehicle determines the market spread, while the competitive conditions are driven by the new or improved product decision. In both cases, the automotive industry firms must know the stages of the most appropriate vehicle design in their own right, and the steps of forming new project dynamics must be devised in this direction. In this study, the result oriented activity of the current vehicle design phases used in the automotive industry companies is determined and the order of importance of the stages is listed. For this purpose, under the same conditions of competition (the same market, the same class vehicles develops and manufactures), 4 in the automotive firm administration, a total of 40 employees (4 × 10 process manager) with the vehicle design was evaluated by determining the effectiveness of the use of the stage. At this stage, analytic hierarchy methods applied to each of the phases are explored in practice instead of the use of the significance level automotive company. Study of the vehicle design phase of the automotive industry: structure, process modifications or new project reveals the important values to be configured according to the size.
Determination AHP Analysis of the Virtual Stage-Gate Process in the Global Scale Automotive Design  [PDF]
Fuat Ali Paker, Cem Alppay, Begüm Sertyesilisik
World Journal of Engineering and Technology (WJET) , 2018, DOI: 10.4236/wjet.2018.64062
Abstract: In this study, it is aimed to determine the ranking importance levels of the stages to be taken into consideration for new product development on a global scale in the automotive design process. New product design activity and stage-gate process differences between local automotive firms (serial production factory and stage-gate department in Turkey) and global automotive companies (serial production factory and stage-gate department in Turkey) are examined comparatively in the research area. In the automotive industry, which has been developing for a century, the question of how the local company products operating in the last sixty years have not been able to spread globally or how to develop global products is the background question of the research. For this purpose, one on one interviews were held with the managers of 3 national and 3 international automotive companies, who worked in the same region and who had previously designed a new vehicle, with design and product development departments.?According to?the data obtained by the AHP (Analytic Hierarchy Process) in the automotive design process, the importance of the criteria that should be taken into account for global product development has revealed. According to the results of the study, it was found that design validation stages were the most important globalization criterion in automotive design process as a new study area. In the comprehensive survey of the study, no other publication has been encountered to measure or evaluate the stages in the automotive design and new product development process in other sectors, including the vehicle industry. As in every industry sector, in the automotive industry, with the new product companies provide market development or competitive advantage. The new product is the life channel of a company and in the realization of this new vehicle; the disciplines of the automotive industry are formed by a hundred years of experience.
The Pre-Republic Period of the Turkish Automotive Industry: Design and Production  [PDF]
Fuat Ali Paker, Cem Alppay, Begüm Sertye?il???k
Art and Design Review (ADR) , 2018, DOI: 10.4236/adr.2018.64018
Abstract: This study was compiled by scientific research publication sheds light on the historical development of the Turkish automotive industry has been compiled for the period of conservation of the original value. The decline in industrial development in the last century of the Ottomans is directly proportional to the progress of Europe in the last century. This decline in the country’s pre-republican industry has surpassed to the rise with the subsequent European customs union agreements. This rise, which is focused on the defense industry in the pre-republican automotive sector, has resulted in successive private sector expansion with regional agreements. Turkeys automotive industry rise with the European customs union agreement, and alternative regional agreements, showed stronger growth. The time of establishment and expansion of the world automotive industry coincides with the last days of the pre-republican Ottoman Empire in our country. Therefore, both the development of this sector, as well as information related to transportation in this industry has been experiencing difficulties. Ottoman archives transcription studies state institute of statistics by ten years period the last period statistically. But its quite old Ottoman archives of Latin translations in the compilation of this data with their letter pretty much will take time.
Control of the menstrual cycle: the impact of nutrition on reproductive function
Cem
Turk Pediatri Ar?ivi , 2011,
Abstract: The menstrual cycle is a complex series of events, especially prone to outside factors during the adolescent period due to the incomplete maturation of hypothalamo-hypophysio-ovarian axis. Both over- and undernutrition may adversely affect the menstrual cycle. Anorexia nervosa, bulimia nervosa and the female athlete triad are the main causes of undernutrition. Menstrual cycle abnormalities and ovulatory problems are common. Overnutrition presents with obesity, becoming more and more prevalent throughout the world, and oligo or anovulation. Present knowledge suggests that energy balance and the amount of readily available energy are more important than “critical weight” in determining anovulation and menstrual cessation. Treatment of these adolescents by a multidiciplinary team increases their reproductive capacity and normolizes their menstrual cycle. (Turk Arch Ped 2011; 46 Suppl: 107-10)
De-Dollarization and European Energy Policy: Testing Brent and WTI  [PDF]
Berk Cem
Open Journal of Social Sciences (JSS) , 2015, DOI: 10.4236/jss.2015.38008
Abstract: Historically most of the oil trade has been made with US Dollars. This has important practical implications. For example, US Dollar is always a reserve currency since it has to be obtained to trade oil. There were previous attempts to trade in Euros such as Iraq however recently there is more support from resource countries such as Russia, China and Iran. A dedollarization campaign against petrodollar has already been started. This can be done by exporting oil, gas and gold with currencies other than US Dollar, such as Ruble, Yuan or Rial or most importantly an international reserve currency which could be Euros as a strong alternative to US Dollar. This is possible due to monetary policy practice of European Central Bank and support from European Union. This increases the value of Euro, decreases interest rates and helps European economy with increased interest on European assets. This paper investigates Brent and WTI for the changes in the value of major currencies. Brent is traditionally a European oil index, and oil is produced in North Sea whereas, WTI (West Texas Intermediate) is a Texas based US oil index. Both indices are used as international benchmarks of oil. The data for this research is daily between February 2011 and September 2014. The WTI and Brent are represented by variables from NYSE exchange traded funds namely Teucrium WTI Crude Oil ETF (WTI), and United States Brent Oil ETF(BRENT). The currencies analyzed for the study are EUR/USD, USD/CHF, USD/JPY, USD/RUB, USD/SAR and USD/ ZAR. The analysis includes unit root tests, vector autoregression (VAR), vector error correction model (VECM), cointegration and Granger Causality. Finally European Energy Policy implications, and opportunities and challenges of oil trade in Euros are discussed.
One Belt One Road Initiative: New Route on China’s Change of Course to Growth  [PDF]
Cem Nalbantoglu
Open Journal of Social Sciences (JSS) , 2017, DOI: 10.4236/jss.2017.51007
Abstract: China’s One Belt One Road Initiative (OBOR) is an inclusive project that is pregnant to profound changes for International Political Economy but also for Chinese Political Economy. In 21st Century, when Chinese Political Economy is observed, it is to be seen that engines of the economy that once led China to development become the very problems that are distorting the development and growth today. Those problems make the “challenges of China” and they are deeply connected to each other making local operations ineffective in long term solutions. Hence, China is in need of a restructuring in social and economic architecture of the country that will not only enable a grand solution to those challenges but that will also guarantee the stability in domestic affairs. By employing One Belt One Road Initiative, China aims to achieve peace and harmony in her domestic structures regarding economy and society. Therefore, China’s domestic challenges render One Belt One Road Initiative essential for the survival of a stable China.
Managing Real Estate Exposure: An Empirical Analysis on Interest Rate Risk  [PDF]
Cem Berk
Journal of Financial Risk Management (JFRM) , 2017, DOI: 10.4236/jfrm.2017.63019
Abstract: Real estate is an illiquid investment with cyclical returns, so risk management techniques should be used for sustainable returns. The risk management techniques include asset based, portfolio, insurance and derivatives solutions. Asset based solutions include the risk character of the real estate, based on where it’s located and how well it is developed. Some property such as foreclosure and those require maintenance is riskier than others. Portfolio solutions allow real estate companies to include real estate with different location and segments such as office and retail. Using this, the risk is limited to the systematic component, where asset based-idiosyncratic risk is tried to be reduced when included enough number of assets to the basket. The management should be capable of determining which risks taking and which to transfer. Some risks such as earthquake, fire, vehicle crush, terrorist activities are rare in nature but can cause severe damage when it takes place. The insurance policies can cover these events which most of the time are reinsured. In addition derivatives are available to hedge some of the risks. These can be traded on the market or over-the-counter. By using derivatives it is possible to hedge interest rate risk, inflation, currency risks, and property price changes. To hedge interest rate risk which is also studied in this paper, instruments such as cap, swap, and collar are available. The research is investigating the role of interest rate risk in the performance of real estate management companies. The variables used in this research are 30 years treasury yield, and exchange closing price for CBRE Group Inc., Colliers International Group, and Jones Lang LaSalle Incorporated. The data is daily for the period 16 June 2004 and 19 June 2015. The methods used are Johansen Cointegration and Granger Causality. The results of the study
Electricity Market Mechanism regarding the Operational Flexibility of Power Plants  [PDF]
Cem Kiyak, Andreas de Vries
Modern Economy (ME) , 2017, DOI: 10.4236/me.2017.84043
Abstract: Electricity market mechanisms designed to steer sustainable generation of electricity play an important role for the energy transition intended to mitigate climate change. One of the major problems is to complement volatile renewable energy sources by operationally flexible capacity reserves. In this paper, a proposal is given to determine prices on electricity markets taking into account the operational flexibility of power plants, such that the costs of long-term capacity reserves can be paid by short-term electricity spot markets. For this purpose, a measure of operational flexibility is introduced enabling to compute an inflexibility fee charging each individual power plant on a wholesale electricity spot market. The total sum of inflexibility fees is accumulated on the spot markets and then can be used to finance a capacity mechanism keeping the necessary reserves to warrant grid reliability. Here each reserve power plant then gets a reliable payment depending on its operational flexibility. The proposal is applied to an exemplary small grid, illustrating its main idea and also revealing the caveat that too high fees paradoxically could create incentives to employ highly flexible power plants on the spot market rather than to run them as backup capacity.
On Energy Dependence, Current Account Deficit and Population in Turkey  [PDF]
Cem Berk, Kazim Oguz Cin
Open Journal of Business and Management (OJBM) , 2018, DOI: 10.4236/ojbm.2018.61012
Abstract:
Energy industry is one of the most important elements in the development of countries. Energy dependence occurs when the energy produced in a country by using its own resources is unable to meet the consumption where the lacking amount needs to be imported. This might lead to significant effects in the current account of an economy. However in addition to non-renewable energy sources (such as natural gas, and oil), alternative production is available in Turkey (such as wind, solar, geothermal, biomass, and hydrogen) as well as projects to install nuclear plants. The population in Turkey on the other hand is unlikely to decrease even in the long term. In the Turkish economy, energy industry might affect the economic growth, trade deficit and population growth. This is proven by various studies explained in the summary of literature section of this paper. In this paper, energy consumption, population and trade deficit are analyzed in a data sample from a period of 1970 until 2014. The data is obtained from World Bank and Central Bank of Turkey. The relationship between energy consumption, population and current account deficit is analyzed by using Granger causality analysis, Augmented Dickey Fuller (ADF) Unit Roots Test”, Vector Autoregression (VAR) and Vector Error Correction Models (VECM). As a result of the “Granger Causaility Analysis”, it is determined that there is a two way relationship between energy consumption and trade deficit and one way relationship between population and trade deficit and between population and energy consumption. Therefore energy production strategies including the use of existing reserves and alternative energy sources are suggested for sustainable economic growth.
Vertex Separators for Partitioning a Graph
Cem Evrendilek
Sensors , 2008, DOI: 10.3390/s8020635
Abstract: Finite Element Method (FEM) is a well known technique extensively studiedfor spatial and temporal modeling of environmental processes, weather predictioncomputations, and intelligent signal processing for wireless sensors. The need for hugecomputational power arising in such applications to simulate physical phenomenoncorrectly mandates the use of massively parallel computers to distribute the workloadevenly. In this study, a novel heuristic algorithm called Line Graph Bisection whichpartitions a graph via vertex separators so as to balance the workload amongst theprocessors and to minimize the communication overhead is proposed. The proposedalgorithm is proved to be computationally feasible and makes cost-effective parallelimplementations possible to speed up the solution process.
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