Endüstri Mühendisliği Bölümü Yayın Koleksiyonu

Permanent URI for this collectionhttps://hdl.handle.net/20.500.12416/279

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  • Conference Object
    Forecasting Day of Week Volume Fluctuations in the Intermodal Freight Transportation
    (Institute of Industrial Engineers, 2011) Ertem, M.A.; Ertem, Mustafa Alp; Endüstri Mühendisliği
    Average daily volume fluctuates intensely based on the day of week in the intermodal freight transportation. Shippers tend to peak around Thursdays and receivers tend to peak around Mondays. These fluctuations bring challenges to the industry in terms of capacity management and getting reliable service from the railroad companies. The purpose of this study is to forecast J. B. Hunt Transport Services, Inc.'s load volume on railroads. Load is meant to be the number of containers that will arrive at a rail ramp during a 24hrs time window. The end in mind is to have better service from the railroad companies and to manage the company owned equipment better. The forecasting model applied to tackle this problem is a multiple linear regression model and is based on the historical in-gate numbers. It uses the previous two year's data and day of week information as independent variables, and current year's data as the response variable. The results indicate better accuracy levels for the model when compared to the two week moving average.
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    Citation - Scopus: 1
    Multi-Manned Assembly Line Balancing Problems With Sequence-Dependent Setup Times
    (Curran Associates Inc., 2017) Güner, F.; Güner, Funda; Kellegöz, T.; Toklu, B.; Çankaya Meslek Yüksekokulu
    In the production of large-size products (such as automobiles, buses, trucks etc.), designing assembly lines with multi-manned workstations may provide decreasing number of total workstations, requirement of large plant area and product flow time. Depending on the characteristics of the tasks about to be started and the one just completed on the same worker, setup times may be significant. Therefore, in some real life situations, it is possible to see setup times between tasks processed successively. In this study, assembly line balancing problems with multi-manned workstations and sequence dependent setup times are addressed. The formal definition of the problem is firstly presented. Then, its mixed integer programming formulation and is developed. In the computational study, by using these formulations, a set of test instances is solved, and results are provided.
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    Differential Algebraic Equations in Primal Dual Interior Point Optimization Methods
    (Amer inst Physics, 2004) Kasap, S; Kasap, Suat; Trafalis, TB; Endüstri Mühendisliği
    Primal dual Interior Point Methods (IPMs) generate points that lie in the neighborhood of the central trajectory. The key ingredient of the primal dual IPMs is the parameterization of the central trajectory. A new approach to the parameterization of the central trajectory is presented. Instead of parameterizing the central trajectory by the barrier parameter, it is parameterized by the time by describing a continuous dynamical system. Specifically, a new update rule based on the solution of an ordinary differential equation for the barrier parameter of the primal dual IPMs is presented. The resulting ordinary differential equation combined with the first order Karush-Kuhn-Tucker (KKT) conditions, which are algebraic equations, are called differential algebraic equations (DAEs). By solving DAEs, we find an optimal solution to the given problem.
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    TKİ-OAL çayırhan yeraltı işletmesinde hazırlık çalışmalarının değerlendirilmesi
    (2004) Eyyuboğlu, E. Mustafa; Bölükbaşı, Naci
    Orta Anadolu Linyitleri (OAL) ülkemizde tam mekanizasyonun uygulandığı ilk yeraltı işletmesidir. 1977 yılında ilk olarak Galeri Açma Makinaları'nm (GAM) kullanımı ile başlayan mekanizasyon çalışmaları 1985-1986 yıllarında yeraltı ocağında makinaların montajı ile devam etmiş ve 1987 yılında mekanize üretim başlamıştır. OAL'nin işletmecilik hakları 2000 yılından itibaren Park Termik A.Ş'ye devredilmiş olup kömür üretimi bu şirket tarafından yürütülmektedir. Bu çalışmada OAL'nin mekanize üretim için hazırlık çalışmalarını başlattığı 1977 yılından, işletme haklarını devrettiği 2000 yılına kadarki sürede yaptığı galeri açma çalışmalarının kapsamlı bir değerlendirilmesi sunulmuştur. Sonuçlar, işletmede özellikle son yıllarda yeterli performansa ulaşılamadığını göstermektedir.
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    Sector Selection for Cluster Formation at OSTİM Industrial Zone: An AHP Application
    (2009) Çetinkaya, Ferda Can; Kandiller, Levent; Satır, Benhür; Umutlu, Mehmet
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    Modeling Dry and Wet Spells of Central Anatolia Region of Turkey
    (2011) Yıldırım, Fetih; Bayrak, Özlem Türker
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