Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
Permanent URI for this collectionhttps://hdl.handle.net/11147/7148
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Article Citation - WoS: 32Citation - Scopus: 37Teleoperation With Kinematically Redundant Robot Manipulators With Sub-Task Objectives(Cambridge Univ Press, 2009) Nath, Nitendra; Tatlicioglu, Enver; Dawson, Darren M.In this paper, control of nonlinear teleoperator systems where both the master and slave systems are kinematically redundant robot manipulators is addressed. The controller is developed under the assumption that the user and environmental input forces arc unmeasurable. Lyapunov-based stability analysis is used to prove that the proposed controller yields asymptotic tracking results and ensures the coordination of the master and slave systems while satisfying a sub-task objective. Numerical simulation results are presented to illustrate the effectiveness of the proposed controller.Book Part Factors Affecting the Learning Process of Professionals in Architectural Design Firms(CRC Press, 2009) Ozturk-Barlak,G.B.; Arditi,D.; Gunaydin,H.M.; Kale,S.; Yitmen,I.Learning is considered to be a sophisticated process and a source of competitiveꀊadvantage. Learning is essential in project-based environments. The one-of-a-kind structure of the operations of architectural design firms triggers special learning needs and requires a continuous learning activity. Learning is considered to improve an architectural design firm’s efficiency by recognizing the role of individuals in enhancing the firm’s objectives. However, theoretical research on individual professionals’ learning process in the architectural design is rather uncommon. The process of individual learning is composed of (1) data acquisition (2) assessment of the acquired information and (3) implementation of the knowledge gained in a group setting. Ten factors were identified to assess the effectiveness of the learning processes of professionals. This study is the first study in the field of architecture that presents a conceptual model about the factors that affect the effectiveness of the learning process of professionals. © 2010 Taylor and Francis Group, London, UK.Article Citation - Scopus: 2Film-Formation Property of Vinylidene Chloride-Methyl Methacrylate Copolymer Latex. Ii. Effect of Latex Storage Temperature(2002) Cai,W.D.; Ramesh,N.; Tihminlioglu,F.; Danner,R.P.; Duda,J.L.; Dhaan,A.Changes in the minimum film-formation temperature (MFFT) of 91:9 wt% vinylidene chloride (VDC)-methyl methacrylate (MMA) latex prepared by the seeded batch process during storage at 5, 20, and 40°C were investigated. MFFT of the latex rose the fastest at 20°C. Infrared absorption of fresh and stored latexes and wide-angle X-ray diffraction of powder polymers obtained by lyophilization of fresh and stored latexes indicated a much greater increase in polymer crystallinity during latex storage at 20°C than at 5 and 40°C. Observed increases in MFFT during latex storage correlated with increases in polymer crystallinity. Infrared absorption of polymer stored at 5-60°C in the dry state, such as lyophilized polymer and coating film, indicated that a polymer crystallinity increase was greater during storage at higher temperatures. These results showed that crystallization behavior of 91:9 wt% VDC-MMA copolymer latex differed from that of VDC-MMA copolymer in the dry state.Article Citation - Scopus: 33Modified Wheat Starches Used as Stabilizers in Set-Style Yogurt(2001) ÓZKAN,M.; YemenicioǦLU,A.; ÇITAK,B.; CemeroǦLU,B.Yogurt was formulated with gelatin; native wheat starch (NWS); and modified wheat starches (MWS) (acetylated cross-linked, hydroxypropylated, or hydroxypropylated cross-linked). Yogurt samples were evaluated for chemical (fat, total solids, pH, titratable acidity); microbiological (yeasts/molds and lactic acid bacteria); and physical (rheological, textural, color, syneresis) properties during 60 days of refrigerated storage. Yogurt formulated with NWS exhibited a significantly greater storage modulus (G') and firmness compared with yogurts prepared with MWS. Minimal syneresis was measured in all yogurt samples. The titratable acidity of yogurt samples increased and pH decreased during storage. Yeasts/molds were not detected while lactic acid bacteria counts decreased ∼ 1 log CFU/g by day 60 in all yogurt samples. This study showed that the characteristics of yogurt formulated with NWS and gelatin were similar, so NWS may be used as an alternative stabilizer. The MWS stabilized yogurts were stable but had different consistencies than gelatin- and NWS-stabilized yogurts.Article Citation - Scopus: 60Distribution of Elements in Honeys and Effect of a Thermoelectric Power Plant on the Element Contents(1998) Üren,A.; Şerifoglu,A.; Sarikahya,Y.Lead, cadmium, iron, copper, zinc, manganese, calcium, magnesium and potassium contents of Turkish honeys were investigated. Most of the elements were more abundant in honeydew honeys than in flower honeys. But calcium content of honeydew honeys was smaller than in flower honeys. Considerable temporal fluctuation of elements was observed in honeydew honeys produced in the same area and from the same hives during autumn 1992, 1993 and 1994. Element contents of Turkish honeys showed high coefficients of variation, and the coefficients of variation decreased with increasing amounts of total minerals in honeys. The thermoelectric power plant which was 15-18 km away from the hives did not cause any pollution in honeys. Turkish honeys did not show any contamination of lead, cadmium, iron or zinc, and amounts of these elements were found well below the permitted limits.Article Citation - Scopus: 2Mısır, Etrüsk, Roma: Piranesi ve Bir On Sekizinci Yüzyıl Tartışması(Orta Doğu Teknik Üniversitesi, 2008) Ek, Fatma İpek; Şengel, DenizOne crucial debate that resonated in eighteenth-century Europe concerned the origins of European architecture whose effects continue to inform present-day notions of the same. Numerous important eighteenth-century works were produced in the context of emergence of the discipline of architectural history. In this architectural, historical, and archaeological framework, Venetian architect and scholar Giovanni Battista Piranesi (1720- 1778) played an important role by his visual and literary works as well as original approach to history. Piranesi developed a history of architecture that was not based on the East/West division and the separation of continents. In opposition to writers like Winckelmann who rooted the origin of Roman architecture in the Greek, he claimed that Roman architecture derived from the Etruscan which found its roots in Egypt. Discussion of roots depended on the eighteenth century on aesthetical theory interpreting Grecian architecture as ‘beautiful’ and Roman -thus Egyptian- as ‘sublime’. It was in this lively intellectual environment that Piranesi searched the origins of Roman -and thus the whole Europeanarchitecture. His works were, however, misinterpreted as being Orientalist by contemporary scholars following Said.Article Citation - Scopus: 2Kırılan Temsiliyet : Libeskind'de Bellek,tarih ve Mimarlık(Orta Doğu Teknik Üniversitesi, 2009) Maden, Feray; Şengel, DenizMimarisini ‘yokluk,’ ‘yitirilmişlik’ ve ‘bellek’ kavramları üzerinden çizgiler, çarpıtılmış açılar, kesişen geometriler ve boşluklar etrafında kurgulayan Daniel Libeskind, çok disiplinli mimarisi ve radikal yaklaşımları ile kuşkusuz mimarlık kuram ve pratiğini etkileyen ustaların başında gelmektedir (1). Bellek ve tarihin ‘izleri’ üzerinde şekillenen projeleri ve çoğunlukla da müze yapıları ile karşımıza çıkan Libeskind, Rönesanstan bu yana süregelen mimarlıkta temsiliyet sorunsalı, mimarî temsil ve temsilin mimarlığı gibi tartışmalara, sergilediği aykırı mimari ile yeni bir yön kazandırmaktadır. Makalenin hedefi, Libeskind’in proje ve çizimleri üzerinden, mimarın tarihi yorumlaması çerçevesinde temsiliyet sorununu irdelemektir. Bu irdeleme, mimarlık ile tarih arasında kurulan ilişki bakımından birbirinden farklılaşan modern ve postmodern dönemler arasında kendisine yeni bir konum bulan Libeskind’in tarih anlayışını bir kez daha gözden geçirerek yorumlamayı amaçlamaktadır. Yazı ayrıca Libeskind mimarisinin, mimarlığın geleneksel temsillerinden farklılaşarak disiplinler arası bir yaklaşımla diğer alanlarla kurduğu ilişkiyi sorgulamayı da hedeflemektedir.Article Citation - WoS: 32Citation - Scopus: 34The Cms Barrel Calorimeter Response To Particle Beams From 2 To 350 Gev/C(Springer Verlag, 2009) CMS HCAL/ECAL Collaborations; Sönmez, NasufThe response of the CMS barrel calorimeter (electromagnetic plus hadronic) to hadrons, electrons and muons over a wide momentum range from 2 to 350 GeV/c has been measured. To our knowledge, this is the widest range of momenta in which any calorimeter system has been studied. These tests, carried out at the H2 beam-line at CERN, provide a wealth of information, especially at low energies. The analysis of the differences in calorimeter response to charged pions, kaons, protons and antiprotons and a detailed discussion of the underlying phenomena are presented. We also show techniques that apply corrections to the signals from the considerably different electromagnetic (EB) and hadronic (HB) barrel calorimeters in reconstructing the energies of hadrons. Above 5 GeV/c, these corrections improve the energy resolution of the combined system where the stochastic term equals 84.7 ± 1.6% and the constant term is 7.4 ± 0.8%. The corrected mean response remains constant within 1.3% rms. © Springer-Verlag / Società Italiana di Fisica 2009.Conference Object Citation - Scopus: 5Adaptive Visual Servo Regulation Control for Camera-In Configuration With a Fixed Camera Extension(Institute of Electrical and Electronics Engineers Inc., 2007) Tatlıcıoğlu, Enver; Dawson, Darren M.; Xian, B.In this paper, image-based regulation control of a robot manipulator with an uncalibrated vision system is discussed. To compensate for the unknown camera calibration parameters, a novel prediction error formulation is presented. To achieve the control objectives, a Lyapunov-based adaptive control strategy is employed. The control development for the camera-in-hand problem is presented in detail and a fixed-camera problem is included as an extension.Article Citation - WoS: 3Citation - Scopus: 2Sociospatial Segregation and Consumption Profile of Ankara in the Context of Globalization(Orta Doğu Teknik Üniversitesi, 2009) Akpınar, FigenThe ‘’Global City Hypothesis’’ argues that the economic restructuring of the new global economy produces highly uneven and polarized employment structure in urban society (1). Today, large global cities are marked by unusually high levels of income inequality. The significant increase in foreign investment and the arrival of the multi-national corporations along with the major accounting, advertising, and marketing firms and the fashion, design and entertainment industry caused changes both in spatial and demographic configuration and the internal structure of large metropolitan cities. The consequence of the economic restructuring is ‘class polarization’ characterized by a number of high income professionals and managerial jobs, and a vast population of low income causal, informal and temporary forms at the bottom. The effects of liberalization policies resulted in unprecedented fragmentation and polarization within the ‘middle class’ with the worsening public sector functionaries as some employees of the multinational firms had become wealthier (Kandiyoti, 2002, 5). This new wealth has engendered new social groups characterized as ‘young professionals’ or ‘new job elite’ with an increasingly educated cohorts of leading business with affluent lifestyles and consumption patterns similar to their global counterparts. Though such changes and processes occur to some extent in most developed world cities, the approach by the global city theorists seems to be accepted as the valid and elucidative pattern in general, and imposes a kind of generalization that in reality there are more counter evidences even in leading world cities and other metropolitan areas of the world which reveal different pattern (Maloutas, 2007, 734).