Abstract:The metropolitan city of Istanbul is becoming overcrowded and the demand for clean water is steeply rising in the city. The use of analytical approaches has become more and more critical for forecasting the water supply and demand balance in the long run. In this research, Istanbul's water supply and demand data is collected for the period during 2006 and 2014. Then, using an autoregressive integrated moving average (ARIMA) model, the time series water supply and demand forecasting model is constructed for the period between 2015 and 2018. Three important sustainability metrics such as water loss to supply ratio, water loss to demand ratio, and water loss to residential demand ratio are also presented. The findings show that residential water demand is responsible for nearly 80% of total water use and the consumption categories including commercial, industrial, agriculture, outdoor, and others have a lower share in total water demand. The results also show that there is a considerable water loss in the water distribution system which requires significant investments on the water supply networks. Furthermore, the forecasting results indicated that pipeline projects will be critical in the near future due to expected increases in the total water demand of Istanbul. The authors suggest that sustainable management of water can be achieved by reducing the residential water use through the use of water efficient OPEN ACCESSSustainability 2015, 7 11051 technologies in households and reduction in water supply loss through investments on distribution infrastructure.

The sustainability impact of air transportation has become crucial to communities. Airports around the world are forced to be transparent with the society and to declare their sustainability results. As the sustainability goals and objectives and due to its multi‐dimension aspects that are needed to be decided of and subsequently improved, the decision has been taken, and the parameters have been selected due to its significance in this field. This research presents a managerial approach combining the optimization‐based frontier approach with the Global Report Initiative's comprehensive sustainability database for selected 30 major international airports based on data availability. In this regard, eco‐efficiency analysis is carried out with four different models using input‐oriented modeling with multiple undesirable environmental inputs (energy, carbon, water, and waste) and desirable outputs (revenue, passenger and employment) to compare efficiency and sustainability levels of airports in different contexts. Finally, performance improvement targets of each environmental indicators are presented for the airports. These comparative models reveal different frontier airports, which provide the opportunity to analyze diversified reference points for the same decision‐making unit. The presented statistical study has shown that San Francisco, Hong Kong, Hamad International Airport are the most efficient airports in terms of overall sustainability performance based on collected data and selected indicators. The authors also concluded that there is a discrepancy in sustainability data reporting between airports, and there is a need for collecting complete, consistent and real‐time social, environmental, economic, and governance data, to better compare and evaluate the performance of each airport from a sustainability perspective.

Rekabetçiliğin en önemli unsuru şüphesiz yeni teknolojiler üretebilmektir. Günümüzde teknoloji geliştirmenin yolu üniversitelerde ve şirketlerde yürütülen çalışmalarla bilginin üretilmesi ve akabinde üretilen bilginin uygulamaya geçirilebilmesi halinde teknolojiye dönüştürülmesidir. Bu işbirliğinin verimli bir şekilde sağlanabilmesi ancak birtakım ara yüzlerin kamu ölçeğinde geliştirilmesi ve gerekli teşvik edici yasal düzenlemelerin yapılması ile mümkündür. Dolayısıyla devletin üniversite -sanayi işbirliğinde kolaylaştırıcı ve teşvik edici rol oynaması önemli bir koşul olmaktadır. Teknoloji geliştirmesi sadece üretim sektöründe değil, hizmet sektöründe de olabilir. Bu yüzden 'sanayi' sözcüğü 'mal veya hizmet üreten firma' olarak algılanmalıdır.Çalışmada rekabetçilik çerçevesinde üniversite -sanayi işbirliği incelenmiş ve devletin oynadığı rol ile geliştirdiği arayüzler anlatılmıştır. Ayrıca dünya örnekleri de irdelenerek ülkemizde geliştirilen arayüzlerin en başarılı örneklerinden birisi olması beklenen Teknopark İstanbul bir örnek vaka mantığı çerçevesinde incelenmiş, başarılı bir üniversite -sanayi -devlet işbirliği için, özellikle teknoparklarda, gerekli unsurlar belirlenmeye ve öneriler sunulmaya çalışılmıştır.

This study analyzes the relationship between entrepreneurship intention and personal characteristics and skills by using the surveys we conducted in Turkey on 1465 senior university students. We use a modified version of the Entrepreneurial Orientation (EO) scale and the Political Skills Inventory to measure some personal characteristics and skills. We also use the nine sub-dimensions of these two scales. Probit model and wavelet coherence analysis results show that proactivity, entrepreneurship, and networking sub-dimensions of the scales are related to entrepreneurship intention. We also find that gender, the number of siblings, the grade point average (GPA) of the students, their family’s education level, the parent’ ownership of an enterprise, and the number of non-governmental organizations (NGO) that they are a member of are also related to entrepreneurship intention. Results may be useful to understand and enhance entrepreneurship potential.

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