Browsing by Author "Atan, Sabri Tankut"
Now showing items 1-15 of 15
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Dynamic frontier estimation for monitoring team performances: A case on Turkish first division football league
Yılmaz, Melike; Aksezer, Sezgin Çağlar; Atan, Sabri Tankut (Emerald Group Publishing Limited, 2019-06-10)Purpose: This paper aims to investigate how predictions of football league standings and efficiency measures of teams, obtained through frontier estimation technique, evolve compared to actual results. Design/methodology/approach: ... -
A genetic algorithm for final exam scheduling of Işık University
Yıldırım, Seda (Işık Üniversitesi, 2013-05-07)Exam timetabling is a widely encountered scheduling problem at educational institutions. Typically, exam timetabling problems involve some hard constraints and several soft constraints that may vary from one institution ... -
A genetic algorithm for simultaneously scheduling games and assigning referees in Turkish football league
Hüseyinoğlu, Olgu Pelin (Işık Üniversitesi, 2014-01-15)Scheduling games in a league and referee assignment are important planning tasks of professional football federations. Previous research studied game scheduling and referee assignment problems separately. This thesis ... -
Minimization of rest mismatches in round robin tournaments
Atan, Sabri Tankut; Çavdaroğlu, Burak (Pergamon-Elsevier Science Ltd, 2018-11-01)In sports tournaments, an occurrence of a difference in the rest periods of opponent teams in a game, which we refer to as a rest mismatch, will disadvantage the less rested team. Thus, it is only fair to expect opposing ... -
Optimal project duration for resource leveling
Eren, Elif; Atan, Sabri Tankut (Elsevier Science BV, 2018-04-16)Resource leveling is important in project management as resource fluctuations are costly and undesired. Typically, schedules with better resource profiles are obtained by shifting the activities within their float times ... -
Optimal project duration for resource leveling
Eren, Elif (Işık Üniversitesi, 2017-07-13)Resource leveling is important in project management as resource fluctuations are costly and undesired. Typically, schedules with better resource profiles are obtained using the schedule found by Critical Path Method and ... -
An optimization-based decision support system for dormitory placement at Işık University
Yavuz, Tonguç (Işık Üniversitesi, 2015-12-16)Placing students to dormitories is a yearly, routine activity at universities. Until recently, this process has been accomplished manually at Işık University. The manual process had several disadvantages: it was slow, it ... -
Prediction of final football league standings by dynamic frontier estimation
Yılmaz, Melike (Işık Üniversitesi, 2017-07-13)Data Envelopment Analysis (DEA) is a commonly used method for efficiency assessment of teams in many sports including football. In this work, we investigate how estimations of final league standings with DEA efficiency ... -
Procurement and activity planning for a production line provider
Ateş, Gülşah (Işık Üniversitesi, 2020-01-16)Consider a production line provider with the following problem. Turnkey production lines should be delivered to global clients by contractual due-dates. Machines in the production lines can be bought from suppliers or built ... -
Re-mining item associations: Methodology and a case study in apparel retailing
Demiriz, Ayhan; Ertek, Gürdal; Atan, Sabri Tankut; Kula, Ufuk (Elsevier Science BV, 2011-12)Association mining is the conventional data mining technique for analyzing market basket data and it reveals the positive and negative associations between items. While being an integral part of transaction data, pricing ... -
Re-mining positive and negative association mining results
Demiriz, Ayhan; Ertek, Gürdal; Atan, Sabri Tankut; Kula, Ufuk (Springer-Verlag Berlin, 2010)Positive and negative association mining are well-known and extensively studied data mining techniques to analyze market basket data. Efficient algorithms exist to find both types of association, separately or simultaneously. ... -
Simultaneous scheduling of football games and referees using Turkish league data
Atan, Sabri Tankut; Hüseyinoğlu, Olgu Pelin (Blackwell Publishing Ltd, 2017-05)Assignment decisions of referees to football (soccer) games are highly debated in sports media. Referee assignments are typically done on a weekly basis as the league progresses. However, this practice ignores important ... -
Statistical analysis of bus transportation networks for four largest cities in Turkey
Çoban, Veysel (Işık Üniversitesi, 2011-06-01)Network properties for public bus transportation networks (BTNs) of four largest cities (İstanbul, İzmir, Ankara, Bursa) in Turkey have been analyzed under C-, L- and P-Space topologies. Node degree distributions are shown ... -
Statistical analysis of bus transportation networks of Istanbul
Çoban, Veysel; Atan, Sabri Tankut (World Scientific Publishing Co Pte Ltd, 2016)Transportation networks such as railway, airport and bus networks are the real-world networks whose inherent statistical properties characterize and differentiate the networks. In order to understand the network characteristics ... -
Türk hazır giyim sanayi için veri madenciliği tabanlı bir kalıcı indirim yönetim sistemi prototipi
Demiriz, Ayhan; Ertek, Gürdal; Kula, Ufuk; Atan, Sabri Tankut (Tübitak, 2010-12)Tekstil sektörünün önemli bir alt-sektörü olan hazır giyim sanayindeki eğilim, üretici firmaların aynı zamanda perakendeci olarak da faaliyet göstermeleridir (LC Waikiki, Mavi Jeans, v.b.). Son yıllarda özellikle A.B.D’de ...
