Browsing by Author "Aydın, Hakan"
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Açık Ve Uzaktan Öğrenme Araştırmalarında Delfi Tekniğinin Kullanımı
Aydın, Hakan; Koçdar, Serpil (Anadolu Üniversitesi, 2013)Araştırmanın amacı açık ve uzaktan öğrenme alanında Delfi tekniğinin kullanıldığı araştırmaların analiz sonuçlarını sunmaktır. Bu alandaki araştırmacılara yol göstermesi açısından öncelikle Delfi tekniği ayrıntılı olarak ... -
Component-based exergetic measures of an experimental turboprop/turboshaft engine for propeller aircrafts and helicopters
Aydın, Hakan; Turan, Önder; Karakoç, Tahir Hikmet; Midilli, Adnan (Inderscience Enterprises LTD, 2012)In this paper, component-based exergetic assessment is presented for an experimental turboprop/turboshaft engine, including comparisons and exergetic performance such as their efficiencies, improvement potentials, exergy ... -
A Cycle of Online Education Ecstasy/Agony: to Mooc Or Not to Mooc
Tu, Chih-Hsiung; McIsaac, Marina; Doyle, Robert; Aydın, Hakan; Özkul, Ali Ekrem (IEEE, 2013)MOOC stands for Massive Open Online Course, which is catching a lot of attention in higher educations. This attention particularly is popularized by mass media on the comments from innovative, disruptive, educational ... -
Çevrimiçi ders veren öğretmenlerin üstlenmesi gereken roller ve sahip olmaları gereken yeterliliklerin belirlenmesi : (Anadolu Üniversitesi'nde bir uygulama örneği)
Turan Eroğlu, Dilek (Anadolu Üniversitesi, 2003)Bu araştırmada çevrimiçi öğretmenlerin çevrimiçi ortamda ders verirken ne tür rolleri üstlendikleri ve ne tür yeterliliklere sahip olduklarının belirlenmesi amaçlanmıştır. Bu amaç doğrultusunda çevrimiçi ders veren ... -
Çevrimiçi öğrenme topluluklarında iletişimci biçimlerinin belirlenmesi
Dursun, Özcan Özgür (Anadolu Üniversitesi, 2011)Bu çalışma, bireylerin yüzyüze ve çevrimiçi öğrenme topluluklarındaki iletişimci biçimlerinin belirlenmesi ve her iki ortamdaki iletişimci biçimleri arasındaki ilişkilerin ortaya çıkarılması amacıyla gerçekleştirilmiştir. ... -
Dynamic modeling of exergy efficiency of turboprop engine components using hybrid genetic algorithm-artificial neural networks
Baklacıoğlu, Tolga; Turan, Önder; Aydın, Hakan (Pergamon-Elsevier Science LTD, 2015)Genetic algorithm is utilized to design the optimum initial value of parameters and topology of the artificial neural network which is trained by applying the improved backpropagation algorithm using momentum factor so as ... -
Energetic and exergetic efficiency modeling of a cargo aircraft by a topology improving neuro-evolution algorithm
Baklacıoğlu, Tolga; Aydın, Hakan; Turan, Önder (Pergamon-Elsevier Science LTD, 2016)An aircraft is a complex system that requires methodologies for an efficient thermodynamic design process. So, it is important to gain a deeper understanding of energy and exergy use throughout an aircraft. The aim of this ... -
Energetic and exergetic performance assessment of a turboprop engine at various loads
Aydın, Hakan; Turan, Önder; Midilli, Adnan; Karakoç, Tahir Hikmet (Inderscience Enterprises LTD, 2013)It is necessary to understand the mechanisms that have enabled improvements of performance parameters such as thermodynamics efficiencies, thrust or power, specific fuel consumption and specific power in aero engines, thus ... -
Environmental impact assessment of a turboprop engine with the aid of exergy
Atılgan, Ramazan; Turan, Önder; Altuntaş, Önder; Aydın, Hakan; Synylo, Kateryna (Pergamon-Elsevier Science LTD, 2013)To develop approaches that effectively reduce engine environmental effect of aircrafts, it is necessary to understand the mechanisms that have enabled improvements in thermodynamic efficiency of aircraft engines. In the ... -
Exergetic and exergo-economic analysis of a turboprop engine: a case study for CT7-9C
Aydın, Hakan; Turan, Önder; Midilli, Adnan; Karakoç, Tahir Hikmet (Inderscience Enterprises LTD, 2012)The turboprop engine has played an important role in short haul commuter and military transport aircraft where high speed is not critical. It may provide the aviation sector with one of the most significant means of achieving ... -
Exergetic performance of a low bypass turbofan engine at takeoff condition
Aydın, Hakan; Turan, Önder; Midilli, Adnan; Karakoç, Tahir Hikmet (Springer International Publishing, 2014)In this article, exergetic methodology is applied for a low bypass turbofan engine at maximum power setting. The engine is a low-bypass (0.96–1) turbofan engine and its variants fitted to the 737-100/200 all comprise six ... -
Exergetic Sustainability Indicators as a Tool in Commercial Aircraft: A Case Study for a Turbofan Engine
Aydın, Hakan; Turan, Önder; Karakoç, Tahir Hikmet; Midilli, Adnan (Taylor & Francis Inc, 2015)This paper focuses on the exergetic sustainability indicators of a medium-range commercial aircraft engine for constant reference environment and ground running conditions. First, a detailed exergy analysis of turbofan ... -
Exergo-economic analysis of an experimental aircraft turboprop engine under low torque condition
Atılgan, Ramazan; Turan, Önder; Aydın, Hakan (Springer Science and Business Media, LLC, 2014)Exergo-economic analysis is an unique combination of exergy analysis and cost analysis conducted at the component level. In exergo-economic analysis, cost of each exergy stream is determined. Inlet and outlet exergy streams ... -
Exergo-sustainability indicators of a turboprop aircraft for the phases of a flight
Aydın, Hakan; Turan, Önder; Karakoç, Tahir Hikmet; Midilli, Adnan (Pergamon-Elsevier Science LTD, 2013)One of the key challenges for sustainable aviation is to reduce global and local environmental impacts. The scope of this study is analysed and discussed in detail for better understanding of sustainability performances ... -
Exergy-based sustainability analysis of a low-bypass turbofan engine: A case study for JT8D
Turan, Önder; Aydın, Hakan (Elsevier Science BV, 2016)The growth in demand for air transport is a problem for the global and local environment. There are, moreover, fundamental conflicts with sustainable development objectives. Sustainability demands a sustainable supply of ... -
Numerical calculation of energy and exergy flows of a turboshaft engine for power generation and helicopter applications
Turan, Önder; Aydın, Hakan (Pergamon-Elsevier Science LTD, 2016)Fuel efficiency of aircraft and helicopter becomes greater concern in recent years caused by rising fuel costs and as well as environmental impact of aviation emissions. Modern helicopters, however, highly complex systems ... -
Sustainability assessment of PW6000 turbofan engine: an exergetic approach
Aydın, Hakan; Turan, Önder; Karakoç, Tahir Hikmet; Midilli, Adnan (Inderscience Enterprises LTD, 2014)In this paper, theory, methodology and example application are developed and shown for a PW6000 high-bypass turbofan engine in terms of exergo-sustainable perspective. To obtain exergetic sustainability indicators, first, ... -
Ticari uçakların ekserjetik sürdürülebilirlik indikatörlerinin geliştirilmesi
Aydın, Hakan (Anadolu Üniversitesi, 2012)Bu tezde ticari uçak ve uçak motorları için ekserjetik sürdürülebilirlik indikatörlerinin araştırılmıştır. Bu amaçla havacılıkta orta ve uzun menzilli yolcu uçaklarında kullanılan yüksek bypass oranına sahip bir turbofan ...