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Arabacioglu B.C.,Mimar Sinan Fine Arts University
Applied Soft Computing Journal | Year: 2010

Though architectural space is the main source and the only indispensable component of any architectural construction, in many cases its boundaries are uncertain, leading intuitive spatial design. Creating a mathematical model of architectural space with concrete results will offer many possibilities for design process in analysing spatial organization, independently from in architect's experience and intuitions. This paper presents a fuzzy inference system based spatial analysis model for spatial analysis for architectural design which brings many advantages to design process. The aim of this article is to investigate the potential of a fuzzy system with a Mamdami inference engine, considering different numbers of membership functions. Two venues have been selected and the fuzzy inference system based spatial analysis model is applied. For better judgement, outcomes of the model have been compared to depthmap analysis model. The results of the model indicate that fuzzy inference system based spatial analysis model performs very well, even with the limited and imprecise data. Such prototype can evolve into a tool for identifying spatial formations for improvements during the architectural design process. © 2009 Elsevier B.V. All rights reserved.

Kocabas A.,Mimar Sinan Fine Arts University
Habitat International | Year: 2013

The aim of this paper is to analyse the emergence of urban planning for climate change in Turkey, with particular reference to climate change mitigation, and to assess the prospects of a gradual transition to low carbon urbanisation. The paper first establishes an analytical perspective, in terms of normative models of low carbon urban development and the specificities of Turkish urbanisation processes. This perspective informs the analysis of the evolution of policies to reduce carbon emissions from cities which led to adoption of the first Turkish National Climate Change Action Plan in July 2011.The paper then argues that a move towards low carbon urbanisation is contingent on integrating national energy and climate change policies with evolving national policies for urban development and regeneration. The paper concludes that recent national policy innovations are an important first step and that continuing international support will sustain the momentum, but that significant progress towards low carbon urbanisation in Turkey will depend on the effectiveness of continuing efforts to improve the regulation of urban development. © 2011 Elsevier Ltd.

Sev A.,Mimar Sinan Fine Arts University
Civil Engineering and Environmental Systems | Year: 2011

Building environmental assessment (BEA) tools have become widespread in recent years and attracted the construction sector and public awareness in sustainability. Being partially effective in mitigating the environmental impacts of buildings, these tools reveal difficulties in their application, especially for developing countries and regional adaptations. Most of the BEA tools have been developed nationally and reflect the priorities of the conditions under which they have emerged. However, they are directly used or adapted for use in other countries. Importing these tools from one nation to another causes problematic consequences. This paper presents a comparative analysis of the most widely used BEA tools, which are established in developed countries, and discusses the current situation of these tools. The most highlighting matters related with these tools are that, they mostly do not cover economic and social issues, which have priority for developing countries, they are not flexible for cultural and regional variations, and they do not reflect the results of the assessment in a comprehensive manner. The lack of a consensus-based weighting system is also another problematic issue. However, it is possible to enhance BEA tools for regional adaptations and developing countries, as well as for future versions. © 2011 Taylor & Francis.

Akkaya Arier U.O.,Mimar Sinan Fine Arts University | Tepehan F.Z.,Technical University of Istanbul
Composites Part B: Engineering | Year: 2014

In this work, TiO2-Al2O3 nano-composite films were deposited on glass substrates by the sol gel method. The structural and optical properties of TiO2-Al2O3 nano composite films were characterized for different Al2O 3:TiO2 volume ratio in TiO2-Al 2O3 solution. The crystal size of TiO2 nanoparticles in TiO2-Al2O3 nano-composite films was determined for the different Al2O3:TiO 2 volume ratios. Band gap energy values of the films were controlled by changing Al2O3:TiO2 ratios. The properties of TiO2-Al2O3 nano-composite films were characterized by X-ray diffraction (XRD), atomic force microscopy (AFM), ultraviolet-visible spectroscopy (UV-vis), scanning electron microscopy (SEM), spectrophotometer (Perkin-Elmer), and Fourier transform infrared spectroscopy (FTIR). SEM results showed flower-like TiO2-Al2O 3 nano-composite films. © 2013 Elsevier Ltd. All rights reserved.

Senoguz V.N.,Mimar Sinan Fine Arts University | Shafi Q.,University of Delaware
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | Year: 2016

We consider non-supersymmetric GUT inflation models in which intermediate mass monopoles may survive inflation because of the restricted number of e-foldings experienced by the accompanying symmetry breaking. Thus, an observable flux of primordial magnetic monopoles, comparable to or a few orders below the Parker limit may be present in the galaxy. The mass scale associated with the intermediate symmetry breaking is 1013 GeV for an observable flux level, with the corresponding monopoles an order of magnitude or so heavier. Examples based on SO(10) and E6 yield such intermediate mass monopoles carrying respectively two and three units of Dirac magnetic charge. For GUT inflation driven by a gauge singlet scalar field with a Coleman-Weinberg or Higgs potential, compatibility with the Planck measurement of the scalar spectral index yields a Hubble constant (during horizon exit of cosmological scales) H∼7-9×1013 GeV, with the tensor to scalar ratio r predicted to be ≳0.02. Proton lifetime estimates for decays mediated by the superheavy gauge bosons are also provided. © 2015 The Authors.

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