Y. Arikan | İstanbul Kemerburgaz University (original) (raw)
Papers by Y. Arikan
Advances in Therapy, 2007
During laparoscopic surgery, gases such as carbon dioxide (CO 2), helium, or normal air are insuf... more During laparoscopic surgery, gases such as carbon dioxide (CO 2), helium, or normal air are insufflated into the intra-abdominal cavity so the surgeon can obtain a clear surgical field; however, this insufflation technique may cause injury to the intra-abdominal organs. This study was undertaken to evaluate the effects of different pressures of CO 2 on the apoptotic index in the peritoneum during laparoscopic surgery. A total of 30 Sprague-Dawley male rats were used in the study. CO 2 was insufflated into the intra-abdominal cavity via an angiocatheter cannula by an insufflator at pressures of 10 and 20 mm Hg over 60 min. In the control group, the cannula was inserted into the intra-abdominal cavity, but no gas was insufflated. After 60 min, the rats were killed; peritoneum was harvested from the abdominal wall and was cultured in the cell culture laboratory. Apoptotic and living cells were detected immunohistochemically, and the apoptotic index was calculated and statistically analyzed. The data collected revealed that the apoptotic index increases in proportion to the level of CO 2
Diffusion of environmentally sound technology: findings from the Turkish case. Çetindamar, Dilek ... more Diffusion of environmentally sound technology: findings from the Turkish case. Çetindamar, Dilek and Arıkan, Yıldız (2006) Diffusion of environmentally sound technology: findings from the Turkish case. In: 12th International Conference ...
IEEE Transactions on Power Systems, 2017
We consider a mid-sized private electricity generating company that plans to enter the market tha... more We consider a mid-sized private electricity generating company that plans to enter the market that is partially regulated. There is a cap and trade system in operation in the industry. There are nine possible power plant types that the company considers to invest on through a planning horizon. Some of these plants may include a carbon capture and storage technology. We develop a stochastic mixed-integer linear program for this problem where the objective is to maximize the expected net present value of the profit obtained. We include restrictions on the maximum and minimum possible amount of investment for every type of investment option. We also enforce market share conditions such that the percentage of the total investments of the company over the total installed capacity of the country stay between upper and lower bounds. Moreover, in order to distribute the investment risk, the percentage of each type of power plant investment is restricted by some upper bound. We tested the model for a hypothetical company operating in Turkey. The results show that the model is suitable to be used for determining the investment strategy of the company.
Proceedings of 8th Mediterranean Electrotechnical Conference on Industrial Applications in Power Systems, Computer Science and Telecommunications (MELECON 96)
The energy planning problem has gained a new dimension in view of the effects of energy productio... more The energy planning problem has gained a new dimension in view of the effects of energy production and consumption on environmental decline and ecological damage. The problem was usually formulated in total cost minimization form and the environmental effects of energy activities were not taken into account. It has been well understood now that decisions concerning energy supply cannot be
Energy Policy, 2001
This paper presents a modelling attempt to endogenise the level and timing of environmental taxes... more This paper presents a modelling attempt to endogenise the level and timing of environmental taxes within an optimisation framework. First, a base model of energy-economy-environmental interactions is extended to allow for exogenous tax analysis. Two types of environmental taxes, one on the sulphur content of fuels and the other on the level of emissions, are exogenously included in the model as alternative instruments to mitigate pollution. Next, the base model is modified to endogenise pollution abatement. This has been achieved by incorporating a preference rate, depending on an index of emissions, into the utility function. Finally, the emission index and emission tax are taken as substitutes and modelled within a CES form to endogenise the emission tax. Results for all cases, obtained with Turkish data, are discussed. It is found that a tax on SO 2 emissions is more effective in reducing SO 2 emissions than a tax applied on the sulphur content of fuels. It is also found that a gradually increasing tax is more effective in reducing emissions than a constant tax.
Energy Policy, 2008
There is a worldwide interest in renewable electricity technologies (RETs) due to growing concern... more There is a worldwide interest in renewable electricity technologies (RETs) due to growing concerns about global warming and climate change. As an EU candidate country whose energy demand increases exponentially, Turkey inevitably shares this common interest on RET. This study, using an aggregate economic equilibrium model, explores the economic costs of different policy measures to mitigate CO 2 emissions in Turkey. The model combines energy demands, capital requirements and labor inputs at a constant elasticity of substitution under an economy-wide nested production function. Growing energy demand, triggered by economic growth, is met by increased supply and initiates new capacity additions. Investment into RET is encouraged via the incorporation of (a) endogenous technological learning through which the RET cost declines as a function of cumulative capacity, and (b) a willingness to pay (WTP) function which imposes the WTP of consumers as a lower bound on RET installation. The WTP equation is obtained as a function of consumer income categories, based on data gathered from a pilot survey in which the contingent valuation methodology was employed. The impacts of various emission reduction scenarios on GDP growth and RET diffusion are explored. As expected, RET penetration is accelerated under faster technological learning and higher WTP conditions. It is found that stabilizing CO 2 emissions to year 2005 levels causes economic losses amounting to 17% and 23% of GDP in the years 2020 and 2030, respectively.
The 1997 Kyoto Protocol established the Clean Development Mechanism (CDM) as a way of promoting s... more The 1997 Kyoto Protocol established the Clean Development Mechanism (CDM) as a way of promoting sustainable development while minimizing the costs of limiting greenhouse gas emissions. The mechanism features companies from developed countries to earn certified emission reductions in return for investing in a sustainable development project that avoids emissions in a developing country. The Kyoto Protocol has not become legally binding yet, and the process involved in undertaking CDM projects consists of multiple complex and burdensome steps. However, CDM is still very useful in attracting public and private sector participants for the development of sustainable environment projects in developing countries. In this paper, we share our experiences on establishing business opportunities for CDM project development in Turkey. Six promising project proposals with public- private partnerships that have been initiated through the CDM initiative are described. We conclude that CDM, though i...
Proceedings of MELECON '94. Mediterranean Electrotechnical Conference, 1994
Abstract This paper describes and analyzes the Turkish Build-Operate-Transform (BOT) model for el... more Abstract This paper describes and analyzes the Turkish Build-Operate-Transform (BOT) model for electric power projects. The BOT procedure was created for financing and implementing public projects through the involvement of the private sector, thus reducing ...
eie.gov.tr
... Kaynaklar. Arıkan, Y, Kyoto Protokolü Öncesinde Değişen İklim, Kızışan Müzakereler ve Türkiy... more ... Kaynaklar. Arıkan, Y, Kyoto Protokolü Öncesinde Değişen İklim, Kızışan Müzakereler ve Türkiye, 9. Türkiye Enerji Kongresi, DEK-TMK,İstanbul 2003. DEK-TMK, Enerji Verimliliği Sektör Raporu, 2005. ... GeliştirilmesiGerekenTeknolojiler Deniz-Okyanus Enerjisi. ...
Energy Policy, 2001
This paper presents a modelling attempt to endogenise the level and timing of environmental taxes... more This paper presents a modelling attempt to endogenise the level and timing of environmental taxes within an optimisation framework. First, a base model of energy-economy-environmental interactions is extended to allow for exogenous tax analysis. Two types of environmental taxes, one on the sulphur content of fuels and the other on the level of emissions, are exogenously included in the model as alternative instruments to mitigate pollution. Next, the base model is modified to endogenise pollution abatement. This has been achieved by incorporating a preference rate, depending on an index of emissions, into the utility function. Finally, the emission index and emission tax are taken as substitutes and modelled within a CES form to endogenise the emission tax. Results for all cases, obtained with Turkish data, are discussed. It is found that a tax on SO 2 emissions is more effective in reducing SO 2 emissions than a tax applied on the sulphur content of fuels. It is also found that a gradually increasing tax is more effective in reducing emissions than a constant tax. #
Indian Pediatr, 2010
Trials in developed countries have shown that therapeutic hypothermia reduces the risk of death o... more Trials in developed countries have shown that therapeutic hypothermia reduces the risk of death or severe disability in infants with neonatal encephalopathy. Cooling has been adopted as a standard of care in some parts of the world. Some Indian neonatal units have considered or even embarked upon cooling encephalopathic term newborn infants. In this article we discuss some of the potential ethical questions that should be considered before introducing therapeutic hypothermia in an Indian setting. Evidence from previous trials ...
The 1997 Kyoto Protocol established the Clean Development Mechanism (CDM) as a way of promoting s... more The 1997 Kyoto Protocol established the Clean Development Mechanism (CDM) as a way of promoting sustainable development while minimizing the costs of limiting greenhouse gas emissions. The mechanism features companies from developed countries to earn certified emission reductions in return for investing in a sustainable development project that avoids emissions in a developing country. The Kyoto Protocol has not become legally binding yet, and the process involved in undertaking CDM projects consists of multiple complex and burdensome steps. However, CDM is still very useful in attracting public and private sector participants for the development of sustainable environment projects in developing countries. In this paper, we share our experiences on establishing business opportunities for CDM project development in Turkey. Six promising project proposals with public- private partnerships that have been initiated through the CDM initiative are described. We conclude that CDM, though i...
Advances in Therapy, 2007
During laparoscopic surgery, gases such as carbon dioxide (CO 2), helium, or normal air are insuf... more During laparoscopic surgery, gases such as carbon dioxide (CO 2), helium, or normal air are insufflated into the intra-abdominal cavity so the surgeon can obtain a clear surgical field; however, this insufflation technique may cause injury to the intra-abdominal organs. This study was undertaken to evaluate the effects of different pressures of CO 2 on the apoptotic index in the peritoneum during laparoscopic surgery. A total of 30 Sprague-Dawley male rats were used in the study. CO 2 was insufflated into the intra-abdominal cavity via an angiocatheter cannula by an insufflator at pressures of 10 and 20 mm Hg over 60 min. In the control group, the cannula was inserted into the intra-abdominal cavity, but no gas was insufflated. After 60 min, the rats were killed; peritoneum was harvested from the abdominal wall and was cultured in the cell culture laboratory. Apoptotic and living cells were detected immunohistochemically, and the apoptotic index was calculated and statistically analyzed. The data collected revealed that the apoptotic index increases in proportion to the level of CO 2
Diffusion of environmentally sound technology: findings from the Turkish case. Çetindamar, Dilek ... more Diffusion of environmentally sound technology: findings from the Turkish case. Çetindamar, Dilek and Arıkan, Yıldız (2006) Diffusion of environmentally sound technology: findings from the Turkish case. In: 12th International Conference ...
IEEE Transactions on Power Systems, 2017
We consider a mid-sized private electricity generating company that plans to enter the market tha... more We consider a mid-sized private electricity generating company that plans to enter the market that is partially regulated. There is a cap and trade system in operation in the industry. There are nine possible power plant types that the company considers to invest on through a planning horizon. Some of these plants may include a carbon capture and storage technology. We develop a stochastic mixed-integer linear program for this problem where the objective is to maximize the expected net present value of the profit obtained. We include restrictions on the maximum and minimum possible amount of investment for every type of investment option. We also enforce market share conditions such that the percentage of the total investments of the company over the total installed capacity of the country stay between upper and lower bounds. Moreover, in order to distribute the investment risk, the percentage of each type of power plant investment is restricted by some upper bound. We tested the model for a hypothetical company operating in Turkey. The results show that the model is suitable to be used for determining the investment strategy of the company.
Proceedings of 8th Mediterranean Electrotechnical Conference on Industrial Applications in Power Systems, Computer Science and Telecommunications (MELECON 96)
The energy planning problem has gained a new dimension in view of the effects of energy productio... more The energy planning problem has gained a new dimension in view of the effects of energy production and consumption on environmental decline and ecological damage. The problem was usually formulated in total cost minimization form and the environmental effects of energy activities were not taken into account. It has been well understood now that decisions concerning energy supply cannot be
Energy Policy, 2001
This paper presents a modelling attempt to endogenise the level and timing of environmental taxes... more This paper presents a modelling attempt to endogenise the level and timing of environmental taxes within an optimisation framework. First, a base model of energy-economy-environmental interactions is extended to allow for exogenous tax analysis. Two types of environmental taxes, one on the sulphur content of fuels and the other on the level of emissions, are exogenously included in the model as alternative instruments to mitigate pollution. Next, the base model is modified to endogenise pollution abatement. This has been achieved by incorporating a preference rate, depending on an index of emissions, into the utility function. Finally, the emission index and emission tax are taken as substitutes and modelled within a CES form to endogenise the emission tax. Results for all cases, obtained with Turkish data, are discussed. It is found that a tax on SO 2 emissions is more effective in reducing SO 2 emissions than a tax applied on the sulphur content of fuels. It is also found that a gradually increasing tax is more effective in reducing emissions than a constant tax.
Energy Policy, 2008
There is a worldwide interest in renewable electricity technologies (RETs) due to growing concern... more There is a worldwide interest in renewable electricity technologies (RETs) due to growing concerns about global warming and climate change. As an EU candidate country whose energy demand increases exponentially, Turkey inevitably shares this common interest on RET. This study, using an aggregate economic equilibrium model, explores the economic costs of different policy measures to mitigate CO 2 emissions in Turkey. The model combines energy demands, capital requirements and labor inputs at a constant elasticity of substitution under an economy-wide nested production function. Growing energy demand, triggered by economic growth, is met by increased supply and initiates new capacity additions. Investment into RET is encouraged via the incorporation of (a) endogenous technological learning through which the RET cost declines as a function of cumulative capacity, and (b) a willingness to pay (WTP) function which imposes the WTP of consumers as a lower bound on RET installation. The WTP equation is obtained as a function of consumer income categories, based on data gathered from a pilot survey in which the contingent valuation methodology was employed. The impacts of various emission reduction scenarios on GDP growth and RET diffusion are explored. As expected, RET penetration is accelerated under faster technological learning and higher WTP conditions. It is found that stabilizing CO 2 emissions to year 2005 levels causes economic losses amounting to 17% and 23% of GDP in the years 2020 and 2030, respectively.
The 1997 Kyoto Protocol established the Clean Development Mechanism (CDM) as a way of promoting s... more The 1997 Kyoto Protocol established the Clean Development Mechanism (CDM) as a way of promoting sustainable development while minimizing the costs of limiting greenhouse gas emissions. The mechanism features companies from developed countries to earn certified emission reductions in return for investing in a sustainable development project that avoids emissions in a developing country. The Kyoto Protocol has not become legally binding yet, and the process involved in undertaking CDM projects consists of multiple complex and burdensome steps. However, CDM is still very useful in attracting public and private sector participants for the development of sustainable environment projects in developing countries. In this paper, we share our experiences on establishing business opportunities for CDM project development in Turkey. Six promising project proposals with public- private partnerships that have been initiated through the CDM initiative are described. We conclude that CDM, though i...
Proceedings of MELECON '94. Mediterranean Electrotechnical Conference, 1994
Abstract This paper describes and analyzes the Turkish Build-Operate-Transform (BOT) model for el... more Abstract This paper describes and analyzes the Turkish Build-Operate-Transform (BOT) model for electric power projects. The BOT procedure was created for financing and implementing public projects through the involvement of the private sector, thus reducing ...
eie.gov.tr
... Kaynaklar. Arıkan, Y, Kyoto Protokolü Öncesinde Değişen İklim, Kızışan Müzakereler ve Türkiy... more ... Kaynaklar. Arıkan, Y, Kyoto Protokolü Öncesinde Değişen İklim, Kızışan Müzakereler ve Türkiye, 9. Türkiye Enerji Kongresi, DEK-TMK,İstanbul 2003. DEK-TMK, Enerji Verimliliği Sektör Raporu, 2005. ... GeliştirilmesiGerekenTeknolojiler Deniz-Okyanus Enerjisi. ...
Energy Policy, 2001
This paper presents a modelling attempt to endogenise the level and timing of environmental taxes... more This paper presents a modelling attempt to endogenise the level and timing of environmental taxes within an optimisation framework. First, a base model of energy-economy-environmental interactions is extended to allow for exogenous tax analysis. Two types of environmental taxes, one on the sulphur content of fuels and the other on the level of emissions, are exogenously included in the model as alternative instruments to mitigate pollution. Next, the base model is modified to endogenise pollution abatement. This has been achieved by incorporating a preference rate, depending on an index of emissions, into the utility function. Finally, the emission index and emission tax are taken as substitutes and modelled within a CES form to endogenise the emission tax. Results for all cases, obtained with Turkish data, are discussed. It is found that a tax on SO 2 emissions is more effective in reducing SO 2 emissions than a tax applied on the sulphur content of fuels. It is also found that a gradually increasing tax is more effective in reducing emissions than a constant tax. #
Indian Pediatr, 2010
Trials in developed countries have shown that therapeutic hypothermia reduces the risk of death o... more Trials in developed countries have shown that therapeutic hypothermia reduces the risk of death or severe disability in infants with neonatal encephalopathy. Cooling has been adopted as a standard of care in some parts of the world. Some Indian neonatal units have considered or even embarked upon cooling encephalopathic term newborn infants. In this article we discuss some of the potential ethical questions that should be considered before introducing therapeutic hypothermia in an Indian setting. Evidence from previous trials ...
The 1997 Kyoto Protocol established the Clean Development Mechanism (CDM) as a way of promoting s... more The 1997 Kyoto Protocol established the Clean Development Mechanism (CDM) as a way of promoting sustainable development while minimizing the costs of limiting greenhouse gas emissions. The mechanism features companies from developed countries to earn certified emission reductions in return for investing in a sustainable development project that avoids emissions in a developing country. The Kyoto Protocol has not become legally binding yet, and the process involved in undertaking CDM projects consists of multiple complex and burdensome steps. However, CDM is still very useful in attracting public and private sector participants for the development of sustainable environment projects in developing countries. In this paper, we share our experiences on establishing business opportunities for CDM project development in Turkey. Six promising project proposals with public- private partnerships that have been initiated through the CDM initiative are described. We conclude that CDM, though i...