Browsing by Subject "Nuclear energy"
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Item Restricted Bir bilim insanı: Sadık Kakaç(Bilkent University, 2020) Aytemiz, Pırıl; Zeybek, Gizem; Karadağ, Deniz; Mazılıgüney, Gökmen; Şengünlü, AylinBu makalede Sadık Kakaç’ın Massachusetts Institute of Technology’de (MIT) başlayıp Miami Üniversitesindeki bölüm başkanlığına kadar giden yurt dışı çalışmaları, Türkiye’deki bilimsel faaliyetleri, akademisyenlik yaptığı üniversiteler ve aldığı uluslararası ödüllere kadar geniş bir yelpazede tecrübeleri incelenerek Türk mühendislik eğitim sürecinde nerede durduğu ve yaptığı katkılar araştırılacaktır. Bunun yanı sıra çocukluğu, okul ve üniversite öğretim yılları ve eşi ile evlilik sürecine yer verilecektir. Genel olarak, bu projenin Sadık Kakaç’ın biyografisi ve akademik kişiliği hakkında bir araştırma olması hedeflenmektedir.Item Open Access Contending approaches to nuclear power(Bilkent University, 2005) Berberoğlu, GökçeEnergy is an important figure in international relations, as being one of the most political choices of any country and as a crucial element of a nation’s progress. Among a variety of energy options, nuclear power has been subject to several arguments related its advantages and disadvantages. Especially after the Second World War, this debate on nuclear energy has reached to international levels where scholars and scientists were to discuss their arguments concerning the risks, effects and costs of nuclear energy. This thesis mainly aims to examine this debate between the supporters and critics of the nuclear energy option with an objective point of view. While examining this debate the study respectively focuses on the historical development of nuclear energy, the main arguments of both sides and possible middle grounds for the debate. The implementation of these arguments to Turkey is another subject which the thesis attempts to analyze. Being a descriptive study in nature, this thesis refrains from making any judgments but only objective observations.Item Open Access Isomeric yields of130Sb, 132Sb, 134I, and 136I in the thermal neutron fission of235U(Kluwer Academic Publishers, 1992) Erten, H. N.Isomer yield ratios of130Sb,132Sb,134I and136I isomers formed in the thermal neutron fission of235U have been calculated from our previous experimental studies that led to the identification of these species. In those studies the iodine and antimony fractions formed in fission were rapidly separated and the decay of γ-rays belonging to each isomer pair were followed using Ge(Li) detectors and a multichannel analyzer. The isomer ratios were calculated from growth and decay considerations of these γ-rays. The results are compared with the recently published values obtained with an on-line isotope separator, those from LOHENGRIN, and those from model calculations. Angular momenta of fission fragments corresponding to the measured isomer yields have also been calculated.Item Open Access Nuclear energy development and proliferation concerns in the Middle East(Deutsches Orient-Institut, 2008) Kibaroglu, M.; Caglar, B.This paper aims to present the connections between the drive for nuclear energy and proliferation concerns in the Middle East. It presents the nexus between the energy needs of states worldwide and environmental concerns, explaining the reasons why states opt for nuclear energy. The authors then concentrate on the connection between nuclear energy acquisition and the proliferation concerns raised therein. Within the framework of such a connection, focal states are those in the Middle East.Item Open Access Response of polyelectrolyte layers to the SiO2 substrate charging as probed by XPS(2009) Conger, C. P.; Süzer, ŞefikA single layer of the Cationic polyelectrolyte poly(allyamine) hydrochloride (PAH) deposited, using the layer-by-layer technique, on a silicon substrate containing 5 nm oxide layer is investigated by XPS while applying an external potential bias to the sample to control and manipulate the charge built-up on the oxide layer. Under application of a -10 V bias, the oxide layer is positively charged due to Photoemission process, evidenced by the measured Si2p binding energy of 104.4 eV. Application of a +10 V bias attracts the low energy neutralizing electrons, stemming from a hot filament, and leads to a negatively charged oxide layer, also evidenced by the measured Si2p binding energy of 102.9 eV. The single polyelectrolyte overlayer also responds to this polarity change of the oxide layer underneath by displaying a somewhat larger shifts both in the C1s and Nls peaks. In addition to the shifts in the positions, the N1s peaks undergo a significant intensity depletion, mostly on the positively charged -N+ component. We interpret this intensity depletion to be the result of reorientation of some of the dangling positively charged groups by moving toward the negatively charged oxide underlayer. To our knowledge this is the first time that a chemically specific response to an electrical stimuli is reported using XPS. A bilayer LbL film consisting of PAH and PSS, exhibits even a larger charging shift, but this time no intensity alteration is observed, most probably due to locking of the -N+ groups by the -SO3 + counterions of the second layer. © 2009 American Chemical Society.Item Restricted Türkiye'nin ilk nükleer reaktörü: TR-1(Bilkent University, 2020) Peker, Dilşad Simay; Kırmacı, Selin; Karaca, Kaan; Lomlu, RanaTürkiye'nin ilk reaktörü olan TR-1 hakkında olan bu araştırma yazısı TR-1'in açılma kararından başlayarak kuruluş süresini, aktif yıllarındaki çalışmalarını ve kapanış sürecini sosyal, siyasi ve ekonomik olarak detaylı bir şekilde incelemektedir. Bu süreçlerde karşılaşılan problemlere, halkın bakış açısına, kapanış nedenlerine ve Türkiye'nin gelişimine katkısına da değinen bu yazı TR-1'den sonra nükleer alanında yapılan çalışmaları da anlamak için bir ışık tutmaktadır.Item Open Access Understanding the nuclear energy debate in Turkey : internal and external contexts(Bilkent University, 2010) Udum, ŞebnemNuclear energy generation in Turkey has sparked debates on its relevance and necessity for energy security policy. As a developing country, Turkey chose nuclear energy to address both to sustainability and development needs. The decision is challenged on the basis of “threats” to life, environment and security. The arguments and prescriptions of the contending sides render two meanings for nuclear energy: “asset” and “threat.” This dissertation looks into the construction of these two meanings that prescribe nuclear energy either as the appropriate policy choice or an imminent threat to human life and environment. The respective arguments are shaped by the international norms on nuclear nonproliferation, environmentalism and antinuclearism. This study analyzes the contending discourses in order to find how the opposing meanings of nuclear energy are produced and sustained. It finds that the former meaning and policy prescription is formed with reference to the Realist conception of state power and security. It is Critical Theory, Marxism and Green Political Theory which account for the second meaning of nuclear energy. The “conflict” is not only at the practical but also at the theoretical level. The dissertation argues that this conflict can be addressed through a critical engagement of the parties concerned. It seeks to find common grounds on which the parties can talk. The analysis of the discourses reveals these common grounds where the two sides can find points of reconciliation and formulate a sound energy security policy