İGÜ Akademik BirimleriAcademic Units of IGUhttps://hdl.handle.net/11363/42024-03-28T14:10:11Z2024-03-28T14:10:11ZMulti-objective Solid Transportation Problem in Uncertain EnvironmentDalman, HasanSivri, Mustafahttps://hdl.handle.net/11363/72642024-03-26T01:23:12Z2017-01-01T00:00:00ZMulti-objective Solid Transportation Problem in Uncertain Environment
Dalman, Hasan; Sivri, Mustafa
Although new information technologies
decrease information and transaction costs, transportation
problem of physical goods is still relevant. Globalization of
trade increased the uncertainty that companies are facing, it
also increased the importance of supply chain management
in world economies drastically. Because transportation
systems are crucial for operation management, the problem
of finding efficient and sustainable solutions under such
uncertain environments needs to be studied. Thus, this
paper focuses on ‘‘multi-objective solid transportation
problem (STP) in uncertain environment’’ and presents
some approaches to find the compromised optimal solution
of multi-objective STP. Then, compatible with uncertainty,
fuzzy programming and some techniques of the fuzzy set
theory are implemented to solve the problem by using
Maple 17.02. A numerical example is executed and presented here to illustrate suggested procedures.
2017-01-01T00:00:00ZEustachian tube diameter: Is it associated with chronic otitis media development?Paltura, CekiSelçuk Can, TubaYılmaz, Behice KaniyeDinç, Mehmet EmreDevelioğlu, Ömer NecatiKülekçi, Mehmethttps://hdl.handle.net/11363/72632024-03-26T01:03:11Z2017-01-01T00:00:00ZEustachian tube diameter: Is it associated with chronic otitis media development?
Paltura, Ceki; Selçuk Can, Tuba; Yılmaz, Behice Kaniye; Dinç, Mehmet Emre; Develioğlu, Ömer Necati; Külekçi, Mehmet
Objective: To evaluate the effect of ET diameter on Chronic Otitis Media (COM) pathogenesis.
Study design: Retrospective.
Subjects and methods: Patients with unilateral COM disease are included in the study. The connection between
fibrocartilaginous and osseous segments of the Eustachian Tube (ET) on axial Computed Tomography (CT) images was defined and the diameter of this segment is measured. The measurements were carried out bilaterally
and statistically compared.
Results: 154 (76 (49%) male, 78 (51%) female patients were diagnosed with unilateral COM and included in the study. The
mean diameter of ET was 1947 mm (Std. deviation ± 0.5247) for healthy ears and 1788 mm (Std. deviation ± 0.5306) for
diseased ears. The statistical analysis showed a significantly narrow ET diameter in diseased ear side (p b 0.01).
Conclusion: The dysfunction or anatomical anomalies of ET are correlated with COM. Measuring of the bony diameter of ET
during routine Temporal CT examination is recommended for our colleagues.
2017-01-01T00:00:00ZThe Renewable Energy Potential of Turkish Coasts and A Concept Design of A Near Shore Sea PlatformŞener, BekirAytaç, S.https://hdl.handle.net/11363/72622024-03-26T00:27:35Z2017-01-01T00:00:00ZThe Renewable Energy Potential of Turkish Coasts and A Concept Design of A Near Shore Sea Platform
Şener, Bekir; Aytaç, S.
There are several types of renewable energy platforms. Because of requirements of places, where platforms were
built, every platform has different energy systems and qualities.
In this paper, the renewable energy potential of Turkish coasts was investigated according to different renewable
energy types. It is aimed to find suitable places for a near shore renewable energy platform and create a concept
design.
Firstly, the regions with highest energy potential according to four renewable energy types; wind, wave, current
and solar; were determined and five different regions were selected to analyze. For each region, the power data of
the different energy types were converted to same unit and the regions were ranked with respect to these results.
Then the existing platform types and alternative energy conversion systems were examined and for each energy
type a conversion system was chosen according to the characteristics of selected region. Finally, a concept near
shore platform was designed with selected systems.
2017-01-01T00:00:00ZBending behaviour of two directional functionally graded sandwich beams by using a quasi-3d shear deformation theoryKaramanlı, Armağanhttps://hdl.handle.net/11363/72612024-03-22T01:17:42Z2017-01-01T00:00:00ZBending behaviour of two directional functionally graded sandwich beams by using a quasi-3d shear deformation theory
Karamanlı, Armağan
This paper presents the static behaviour of two-directional functionally graded (FG) sandwich beams
subjected to various sets of boundary conditions by using a quasi-3D shear deformation theory and
the Symmetric Smoothed Particle Hydrodynamics (SSPH) method. The SSPH code, which is developed
based on the present formulation of the FG sandwich beam, is validated by solving a simply supported
conventional functionally graded beam problem. Numerical results which are in terms of maximum
dimensionless transverse deflections, dimensionless axial, normal and shear stresses are compared with
the analytical solutions and the results from previous studies. Various FG sandwich beam structures are
investigated by considering different aspect ratios (L/h) and sets of boundary conditions and using
power-law distribution.
2017-01-01T00:00:00Z