Browsing by Subject "Sustainability"

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Open Access
A literature review on inventory pooling with applications
(MDPI AG, 2025-01-20) Yılmaz, Özlem
In this paper, we provide a review of academic research on inventory pooling published between 2010 and 2024, with a particular emphasis on studies that focus on real-world applications. The review analyzes the research conducted over the past 14 years, evaluates the outcomes of these applied studies, and identifies gaps in the literature. The contribution of this work is twofold: firstly, it provides insights into the extent to which theoretical advancements in inventory pooling have been implemented in the practice; secondly, it provides practitioners with an overview of recent real-world applications across various industrial contexts. The findings highlight the impact of inventory pooling on cost savings, service level improvements, inventory optimization in diverse sectors, and sustainability. Additionally, this paper examines the contributions of inventory pooling to economic, environmental, and social sustainability, offering a comprehensive analysis of its role in fostering sustainable practices across supply chains. Finally, the paper discusses practical challenges encountered in implementation and suggests directions for future research in this domain.
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Ankara Şeker Fabrikası Çiftliği
(Bilkent University, 2025) Balcı, Aysu; Kodalak, Beyzanur; Arslan, Damla; Toker, Fatma Saynur; Özsarı, İrem Sultan
Bu çalışma, 1972-1996 yılları arasında Ankara Şeker Fabrikası Çiftliği’nin yapısını ve işleyişini incelemektedir. Çiftlikte, şeker üretimi sırasında ortaya çıkan pancar posası ve melas gibi yan ürünler hayvan yemi olarak değerlendirilmiş, bu sayede ekonomik verimlilik ve sürdürülebilirlik sağlanmıştır. Çiftlik, üretim faaliyetlerinin yanı sıra çevre köylerdeki çiftçilere modern tarım ve hayvancılık tekniklerini öğreten bir eğitim merkezi olarak da hizmet vermiştir. 1997 yılında özelleştirilene kadar başarılı bir entegrasyon modeli sunan çiftlik, tarım ve hayvancılık alanında önemli katkılar sağlamıştır.
Open Access
Anonim ortaklıklarda kurumsal sürdürülebilirliğin düzenlenme modelleri
(2024-11) Özalp, Mustafa Gökay
Sürdürülebilirlik, tarihin ilkel dönemlerinden bu yana kabul gören bir anlayış olmuş ve zaman içerisinde sürdürülebilirlik, çevresel, sosyal ve ekonomik unsurlar olmak üzere “sürdürülebilir kalkınma” temelinde ele alınan bir kavram haline gelmiştir. Anonim ortaklıklar açısından ise bu konu, kurumsal sürdürülebilirlik kavramı çerçevesinde, sürdürülebilirlik sorunlarının anonim ortaklıklara etkisi, risk ve fırsatların yönetimi, yatırımcıların korunması, hatta geniş anlamdaki tüm menfaat sahiplerinin çıkarları bakımından, öğretide kurumsal yönetim odağında tartışılmıştır. Kurumsal yönetime ilişkin düzenleme modelleri, yasa hükmüne dayanmayan, öneri niteliğindeki ilkeler ile yasa hükmüne dayanan, bağlayıcı nitelikteki kuralları içermektedir. Bu düzenleme modellerinden hangisinin kurumsal yönetim anlayışına daha uygun olduğu ise öğretide sıkça tartışılan bir konu olmuştur. Kurumsal sürdürülebilirlik açısından da benzer tartışma yapılmışsa da konunun iklim krizi, insan hakları gibi aciliyet içeren sorunları bünyesinde barındırması nedeniyle kıyasla daha yoğun tartışılmıştır. Bu kapsamda, çalışmamızda kurumsal sürdürülebilirlik açısından düzenleme modellerinin üstün ve noksan yanları açıklanarak, aynı zamanda düzenleme modellerinin etki değerlendirmesi yapılmış ve öneriler sunulmuştur.
Open Access
The artistic afterlife of electronic waste
(2019-12) Köksal, Esra
This thesis aims to take a closer look at artistic projects that use discarded electronic parts as preferred medium. Electronic waste cumulates as the result of a highly technological era. The artworks that take part in this thesis emphasize that obsolete electronics should not be considered waste. From an array of artworks presented, works from artists such as Grégory Chatonsky, Walter Giers and Gabriel Dishaw partake in this thesis. In order to scrutinize these artworks, this study adopts a theoretical perspective that is strongly rooted in Deleuze and Guattari’s concepts of ‘becoming,’ ‘rhizome’ and ‘deterritorialization.’ These theories are applied to the fluid state of geological properties—such as aluminium, gold, copper and tantalum— that make up electronic devices. The contents that bring electronics to life are mined predominantly from the inner layers of the earth’s strata; therefore, their becomings are initiated long before their functionality in electronics. Contributing to and expanding upon the Deleuzian-Guattarian thought, Braidotti’s articulations on ‘becoming-nomad’ and her argument that nomadic ethics is the path for a sustainable future is also utilized. Besides, engaging in a different perspective toward media, Parikka emphasizes the need to look at media hardware and understand the contents that makes electronics function. Through art, identifying obsolete electronics with a potential for further use engages with issues of sustainability.
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Aski ve Ankara'nın su yönetimi
(Bilkent University, 2023) Kızılırmak,Ercem Ata; Öğüt,Halil Mert; Ünal,Pekşen Ali; Tecelli,Rüzgar Ulaş
Bu makale ASKİ'yi ele almaktadır. Makalenin konusu, bu kurumun zorlukların çözümünde, yenilikçi yaklaşımların uygulanmasında, kentsel planlama ve çevre politikalarının şekillendirilmesinde oynadığı önemli rolüdür. Bunun araştırılabilmesi için eski ASKİ çalışanları olan Ayhan Öğüt ve Burhan Özbük ile görüşme yapılarak Ankara'nın su ve atık yönetiminin dönüştürücü yolculuğunu ve bu evrimin öneminin açıklanması hedeflenmektedir.
Open Access
Barriers to the practice of sustainable interior architecture and design for interior renovations: A Parsimonious-Cybernetic Fuzzy AHP approach
(Elsevier BV, 2022-06-30) Ashour, Mojtaba; Mahdiyar, A.; Haron, S. H.; Hanafi, M. H.
While the notion of sustainability has long been a major concern in the built environment, the practice of sustainable interior architecture and design still falls short. This study aimed to identify and analyse barriers to the practice of sustainable interior architecture and design. To this end, after identifying 30 potential obstacles through a review of literature, a two-round Enhanced Fuzzy Delphi Method involving 13 qualified experts was employed resulting in the exclusion of 10, and the addition of one new barrier. To prioritise the remaining, a novel Parsimonious Cybernetic Fuzzy Analytic Hierarchy Process was introduced, significantly reducing the number of pairwise comparisons and eliminating the need for a complicated AHP questionnaire. Results showed the highest prioritised barriers are: (1) lack of sufficient sustainability modules in the education of interior architects/designers, (2) designers' lack of experience and technical understanding, (3) lack of codes, regulations and specific legal frameworks designed for different types of projects, (4) lack of interest from the client, and (5) designers’ lack of training. The findings of this study provide valuable insights for professional interior architects/designers, educators, statutory authorities, governments, and policymakers. Considering the dearth of existing literature on this topic, the present study fills this gap by providing a comprehensive list of barriers to sustainable interior architecture and design, establishes the groundwork for future research to build upon, and introduces a novel P-CFAHP that has not been employed before.
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Bir aile şirketinden sanayi devine: çok yönlü başarısı ile Abalıoğlu Holding
(Bilkent University, 2023) Sezer, Alp; Deveci, Ayşe Begüm; Şirin, Ceylin; Hadimlioğlu, Merve; Arzu, Sefa
Abalıoğlu Holding, 1941 yılında Cafer Sadık Abalıoğlu’nun ticaret hayatına adım atması ile kurulan ve seksen iki yıldır faaliyet gösteren bir aile şirketidir. Holding başlangıçta ham maddeyi işleyen bir fabrika olarak kurulup ilerleyen yıllarda kâğıt, tekstil ve enerji alanlarında faaliyet göstermeye başlamıştır. Sanayinin çeşitli dallarında gerçekleştirdikleri atılımlara ek olarak sosyal sorumluluk projelerinde de yer alarak toplum bilincinin artırılmasına katkı sağlamaktadırlar. Bu makalenin ana amacı çeşitli sektörlerde faaliyet göstererek başarıyı yakalayan ve kâr amacı gütmeyen vakıflar kurarak insanlığa ve çevreye hizmet eden Abalıoğlu Holding’in kuruluşunu ve yakın Türkiye tarihi içindeki gelişim sürecini incelemektir.
Embargo
Connectivity and spillover during crises: highlighting the prominent and growing role of green energy
(Elsevier, 2023-11-30) Banerjee, A.K.; Şensoy, Ahmet; Goodell, J.W.
How influential are green energy instruments? We examine how green- and carbon-energy assets differ regarding transmitting and receiving shocks between normal versus crises periods. Crises include the global financial crisis and Euro debt crisis, two waves of COVID-19, and the ongoing Russia-Ukrainian war. Our empirical illustration is based on volatility impulse function (VIRF) for dynamic conditional correlation–generalised autoregressive conditional heteroskedasticity (DCC-GARCH) method using daily data from January 03, 2007–March 31, 2023, of several green and brown energy instruments and market and energy controls, we evidence asymmetric connectedness that increases during crises. For specific green instruments, volatility transmissions can be transmitting or receiving. However, green instruments stand out overall as prominent transmitters, while brown energy instruments are prominent receivers. Results are consistent with green energy vehicles impacted by macroeconomic and market states and reflecting this to investors. Results are also consistent with green and brown interconnectivity. Further network analysis provides robustness to our study results and suggests this role is evolving. The study results are significant for policy intervention during the transition to alternative energy sectors and for risk and portfolio management implications
Open Access
Corporate social responsibility in the legal framework of global value chains
(Walter de Gruyter GmbH, 2021-09-06) Ucaryilmaz Deibel, Talya
What is the place of voluntary self-regulation in today’s international trade? Can we continue to understand the contract in its relation to the historical unity of state and law considering the massive transformation of the closely related dichotomies between national and international, public and private, and hard law and soft law? What is the role of corporate social responsibility (CSR) in the contemporary debate over global value chains (GVCs)? This paper addresses on the role of law in societal challenges arising from the kaleidoscopic view of globalization. GVCs operate through interdependent contracts and in relation to multiple normative orders that impose moral, economic, and legal obligations. This paper seeks to re evaluate the role of contract law in its relation to sustainable and ethical global trade. The perspective it develops prioritizes the interaction between extra-legal considerations in contract law and the momentum of CSR as well as the historical dynamics of law, economics, and politics.
Open Access
Digital twin-based approach for thermal efficiency assessment and optimization in the Nigerian construction industry
(2024-06) Haliru, Ibrahim Tahir
The Nigerian construction industry has been experiencing rapid growth over the years. The country's increasing population, urbanization, and economic growth have created a high demand for construction. Abuja, the capital city and administrative hub of Nigeria, has attracted substantial investment in infrastructural development, spanning commercial and residential projects. Nonetheless, substandard practices, inadequate regulations, and disregard for sustainable practices have been plaguing the industry. Therefore, with the aim of identifying recurrent challenges and constraints associated with the adoption of sustainable construction practices in Abuja, this study analyzes the current state of the construction industry, its approach, prioritization, and implementation towards sustainability. Through semi-structured interviews with resident architects, relevant insights were attained, and 18 factors from 8 distinct categories emerge as contributing challenges impeding the progression, adoption, and implementation of sustainable practices in the industry. Furthermore, through the implementation of Digital Twin technology, this study observes and analyzes the real-time thermal performance of a standard residential duplex in Abuja for a duration of fifteen days. Based on the real-time visual feedback and analysis, an exceptionally low amount of daylight illuminance and exceedingly high indoor temperatures were observed. As such, design recommendations and strategies that seek to achieve 3 primary objectives, i.e., minimize solar radiation, maximize daylighting, and effectively utilize efficient passive cooling strategies, are proposed.
Open Access
Eco-design of eco-labels with coarse grades
(Elsevier, 2020-02-03) Nadar, Emre; Ertürk, M. S.
We consider a third-party eco-label certifier that aims to reduce the total environmental impact of production on non-target resources and the total consumption rate of target resources. With these objectives the certifier determines the environmental standards for coarse grades of certification. Eco-labeled production involves a fixed investment cost, a larger marginal production cost, and a restricted access to supply, while eco-labeled products command a price premium. In response to a given grading scheme, we analytically characterize the subgame perfect equilibria for a two-stage game of environmental quality investment and quantity competition in a duopolistic setting. We then conduct numerical experiments to gain insights into whether and when multi-grade eco-labels may be more useful than single-grade eco-labels by providing better environmental protection in the dual objectives of the certifier. While multiple grades of an eco-label may appear in a market with asymmetric firms, our results indicate that multiple grades can indeed be useful under additional conditions: (i) when the investment costs are asymmetric, (ii) when the investment and production costs are asymmetric, either if the firm with the cost advantage has sufficiently low production cost under mild supply restrictions or if the production costs are very different, or (iii) when the supply bases are only moderately asymmetric and sufficiently large. Our findings uncover the role the cost and supply characteristics of the market play in eco-design of eco-labels, calling into question the common practice of offering single-grade eco-labels.
Open Access
The effects of daylight design features on the visitor satisfaction of art museums
(2015-07) Kaya, Şevkiye Merve
Daylight is an important element of lighting design strategies. Daylight allows visual comfort and enhances visual environmental quality within architectural spaces. Daylight usage also allows sustainability by allowing energy conservation. In this manner, proper daylight design issues and control strategies have significant role. However, in art museums, daylight is a very difficult element to deal with. The difficulty is caused because of the damage that can be caused by daylight exposure on different objects with different sensitivity levels in art museums. This study aims to search the effects of daylight design features on the visual environmental quality of art museums and visual comfort of the visitors. A case study was conducted in İstanbul Modern Art Museum, Istanbul. The thesis is based on the user data obtained through a survey questionnaire and daylight simulation data obtained by Autodesk 3D’s Max 2014. A three part questionnaire was conducted with 100 participants for both overcast sky and clear sky condition to rate visitor satisfaction with the museum and importance levels of daylight design issues by considering all art museums in general. The daylight illuminance data of the museum was measured in a scaled model by a computer simulation program. According to the statistical analyses and simulation renderings, daylight design is a multi-parameter task. There are many significant correlations between visual comfort and satisfaction. The study concludes with a number of daylight design guidelines.
Open Access
Effects of daylight design features on visitors’ satisfaction of museums
(SAGE Publications, 2018) Kaya, Şevkiye M.; Afacan, Yasemin
This study evaluates daylight performance in an art museum in İstanbul, Turkey to analyse the effects of daylight design features on visitors’ satisfaction in art museums. The study is based on users’ data obtained through a survey and daylight simulation achieved by Autodesk 3D’s Max 2014. A three-part questionnaire was conducted with 100 participants in overcast- and clear-sky conditions to rate visitors’ satisfaction with the museum and their importance level of daylight design issues in museums. The museum’s daylight illuminance data were measured on a scaled model by a computer simulation program. The statistical results and simulation renderings show that daylight design is a multi-parameter task. There are statistically significant correlations between visual comfort and visitor satisfaction. The study finds two essential daylight considerations for a practical guide to promote healthy and effective daylight use in museums: (i) that certain design aspects in a museum, such as location, window size and window distance from partitions or displays, are important regardless of weather conditions and that (ii) glare prevention from openings such as windows and skylights is also a crucial aspect in visual comfort.
Open Access
Effects of growth volatility on economic performance-empirical evidence from Turkey
(Elsevier BV, 2012) Berument, Hakan; Dincer, N. N.; Mustafaoglu, Z.
This paper examines the relationship between growth and growth volatility for a small open economy with high growth volatility: Turkey. Quarterly data for the period from 1987Q1 to 2007Q3 suggests that growth volatility reduces growth and that this result is robust under different specifications. This paper contributes to the literature by focusing on how growth volatility affects a set of variables that are crucial for growth. Empirical evidence from Turkey suggests that higher growth volatility reduces total factor productivity, investment, and the foreign currency value of local currency (depreciation). Moreover, it increases employment, though the evidence for this is not statistically significant. © 2011 Elsevier B.V. All rights reserved.
Open Access
Energy saving technological progress in overlapping generations economies with renewable and non-renewable resources
(Bilgesel Yayıncılık San. ve Tic. Ltd., 2012) Fazlıoğlu, B. A.; Sağlam, H. Ç.
We study the effects of energy saving technological progress and substitution of renewable energy resources with non-renewable resources on natural resource depletion and long run growth. We develop a growth model in two-period overlapping generations framework incorporating the presence of both renewable and non-renewable energy resources and resource augmenting technological progress. We provide an analytical characterization of the balanced growth path and analyze the conditions for the economy to exhibit positive long run growth. Then, we investigate the effects of discount factor, resource augmenting technological progress and intensity of resources in energy production on the depletion rate. We also examine whether the long run growth is sustainable or optimal. Our main finding is that the effect of an increase in the intensity of the renewable resources in producing energy on long run growth is positive. In addition although exhaustible resources are essential in production the economy can be sustained and the balanced growth path is optimal.
Open Access
Food prosumption technologies: A symbiotic lens for a degrowth transition
(SAGE Publications Ltd, 2023) Vicdan, H.; Ulusoy, E.; Tillotson, J. S.; Hong, S.; Ekici, Ahmet; Mimoun, L.
Prosumption is gaining momentum among the critical accounts of sustainable consumption that have thus far enriched the marketing discourse. Attention to prosumption is increasing whilst the degrowth movement is emerging to tackle the contradictions inherent in growth-driven, technology-fueled, and capitalist modes of sustainable production and consumption. In response to dominant critical voices that portray technology as counter to degrowth living, we propose an alternative symbiotic lens with which to reconsider the relations between technology, prosumption, and degrowth living, and assess how a degrowth transition in the context of food can be carried out at the intersection of human–nature–technology. We contribute to the critical debates on prosumption in marketing by analyzing the potentials and limits of technology-enabled food prosumption for a degrowth transition through the degrowth principles of conviviality and appropriateness. Finally, we consider the sociopolitical challenges involved in mobilizing such technologies to achieve symbiosis and propose a future research agenda.
Open Access
Four essays on overlapping generations resource economies : optimality, sustainability and dynamics
(2012) Fazlıoğlu, Burcu
This dissertation is made up of four essays on overlapping generations resource economies. The Örst essay studies the e§ects of energy saving technological progress and substitution of renewable energy resources with non-renewable resources on natural resource depletion and long run growth. A growth model in two-period overlapping generations framework incorporating the presence of both resources and resource augmenting technological progress is developed. The e§ect of an increase in the intensity of the renewable resources in producing energy on long run growth is found to be positive. Although exhaustible resources are essential in production the economy can be sustained and the balanced growth path is optimal. In the second essay, the implications of assuming di§erent energy intensities for physical capital accumulation and the Önal good production is studied in an overlapping generations resource economy where energy is obtained from the extraction of the natural resources. Apart from the standard literature, physical capital accumulation is assumed to be relatively more energy-intensive than consumption. Multiple steady states, indeterminacy and bifurcations are obtained, without taking non-linearizing assumptions evident in the literature. For the non-renewable resources if the share of energy resources is low enough, local indeterminacy and hopf bifurcations may arise in the model. The aim of third essay is to analyze can costly resource extraction and di§erentiating energy intensities induce dynamics other than saddles in an overlapping generations resource economy. The capital accumulation sector is assumed to be more energy intensive. The energy input is extracted from the natural resources with some extraction costs. The main Önding of the essay is that both naturally evident assumptions contribute to the richness of the dynamics. Depending on the share of resources in capital accumulation dynamics other than saddle ñindeterminacy, áip and hopf bifurcationsñ can arise in the model for the non-zero steady state. In the fourth essay, a feedback mechanism between population and natural resource to a standard model of renewable resource based OLG economy is incorporated to check the stability of the dynamics. Multiple steady states and indeterminacy have been obtained even in the absence of logistic regeneration and independent of intertemporal elasticity of substitution. In particular, transcritical bifurcations may arise in the model varying the rate of constant regeneration with respect to population growth rate.
Open Access
The future of macromarketing: recommendations based on a content analysis of the past twelve years of the journal of macromarketing
(SAGE Publications, 2020-10-16) Ekici, Ahmet; Genç, Tuğçe Özgen; Çelik, Hafize
In their essays published in the Silver Anniversary Issue (SAI) of the Journal of Macromarketing (2006), George Fisk and Mark Peterson independently outlined the current state of the discipline and made a list of visionary recommendations that would help macromarketers adapt and respond to the changing markets, marketing, and societies. These recommendations ranged from repositioning the discipline around the ideas of societal development to leading the way across disciplines toward achieving a sustainable world. Based on a thorough content analysis of the articles published in the Journal of Macromarketing since the SAI, we aim to report the extent to which macromarketing scholarship has responded to the recommendations of Fisk and Peterson. Utilizing the findings, we make a list of new recommendations that can assist macromarketers in fulfilling their mission of ‘saving the world’.
Open Access
Green museums: an introduction and a possible implementation in Ankara
(2020-06) Dedeoğlu, Defne
This thesis explores study the concept of green museums, reviews informational resources on this topic, evaluates the possibility of a green museum in Ankara as a case study and makes suggestions about its implementation. Recently, the severity of the threat of climate change has highlighted the concepts of “green” and “sustainability”. Green building and museum practices emerged to bring these concepts to life. The thesis includes a discussion as well as a timeline on the history of green buildings and green museums. Many international and local green building certification systems have been developed and started to be used for the environmentally friendly construction and implementation of buildings and museums. In this thesis, the criteria of LEED, which is the most known and widely used of these systems, are consulted. Then, the principles required to become a green building, hence a green museum are examined. Some of these are sustainable material selection, efficient use of water and energy, renewable energy sources and waste management. In addition to these green practices common to any green construction, a green museum should also use green exhibition techniques and provide education for a sustainable world. Green museums following these principles exist mainly in the USA. The only example in Turkey is the Konya Tropical Butterfly Garden. A survey was carried out with museum officials in and around Ankara about their awareness and knowledge of the concept of green museums. According to the survey, the subject of green museums is not known much in Ankara. However, the possibility of a green museum in Ankara is very favorable as I demonstrate in my case study. The existence of environmentally conscious consulting firms, eco-friendly material producers, local and natural building materials, and sufficient examples of green buildings are the factors that would facilitate the opening of a green museum in Ankara while a new museum building could be built, many old buildings could be renovated and turned into green museums as well. It has become a necessity, not an option, for museums in Turkey and Ankara to practice green principles because of the increasing environmental problems at present. This thesis is expected to contribute to the creation of awareness of green museums and to serve as an introduction to resources for realizing them.
Open Access
Integrating green building approaches to interior architecture education: a cross-cultural study
(Open House International Association, 2015-09) Pektaş, Ş. T.; Aybar, N. Ş.; Savut, N. Y.; McKinnon, H.
The success of the efforts for green building depends largely on integrating such approaches with building design education. However, most of the existing studies on green building have focused on the technical issues, while its sociocultural and educational aspects have been less examined. In order to alleviate the problem, this paper presents an international workshop that explores how green building design can be taught in a global teamwork project using a green building assessment system, Leadership in Energy and Environmental Design (LEED) checklist as a framework and examples of vernacular architecture as precedents. The results of an empirical survey reveals a gap between students' general learning about green building in a developing and a developed country and suggests that a collaborative project experience may facilitate bridging the gap and exchanging technical and cultural information related to sustainability.