WoS İndeksli Yayınlar Koleksiyonu

Permanent URI for this collectionhttps://hdl.handle.net/20.500.12416/8653

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Citation - WoS: 3
Citation - Scopus: 3
Exploring Fire Safety Conditions of Double Skin Facades
(Gazi Univ, Fac Engineering Architecture, 2024) Aslar, Eylem Ezgi; Harputlugil, Gulsu Ulukavak
Human health, comfort and safety are of primary importance in the built environment. Among the security measures, the most important risk is the risk of fire. For this reason, the issue of fire risk, spread and safety is considered as one of the criteria that should be considered from the building design stage. Within the scope of this study, building models with the same floor height, different plan and facade types, designed in 3D, were analyzed in the fire simulation program called PyroSim. Based on the data obtained as a result of the analyzes, the results of the temperature, smoke and flame spread at the time of fire according to the facade and plan types are presented in tables. As a result of the data obtained, it was determined that box-type systems in double-layer facades are the most problematic facade type in terms of evacuation of living creatures. In terms of smoke spread, it has been revealed that the systems that continue uninterruptedly along the facade pose a problem when the access and spread to other floors are taken into account. It is necessary to consider fire safety as a design problem. It is considered that more detailed studies should be carried out in our country on this subject, that the project should be designed by considering the simulations from the decision stage to the implementation stage of the building, and that the regulations should be developed in order to be a good guide in both the design and implementation stages.
Citation - WoS: 1
Citation - Scopus: 2
A New Route for Regional Planning in Turkey: Recent Developments
(Springer international Publishing Ag, 2019) Ozdemir, Suna S.
Since the 1930s, regional plans have been drawn up for various regions in Turkey. However, the institutional practice of regional development policy as well as regional planning began with the establishment of the State Planning Organisation in 1960. After the 1960s, through Five-Year National Development Plans, a regional development policy was defined, and regional development plans were formulated for some specific regions. In practice, there were some challenges and problems during that period in regional planning. The shift in the regional development policy and regional planning began in 1999 with Turkey's accession period to the European Union. For adaptation to the EU's regional policy, some newpolicies, legislation, and institutional set-ups were defined. This chapter mainly focuses on these new policies and instruments, namely the new route taken by regional planning in Turkey.
Citation - WoS: 6
Citation - Scopus: 4
Symmetries of the Dual Metrics
(World Scientific Publ Co Pte Ltd, 2002) Baleanu, D
In this paper the symmetries of the dual manifold are investigated. We found the conditions when the manifold and its dual admit the same Killing vectors and Killing-Yano tensors. The dual conformal Killing vectors and dual conformal Killing-Yano tensors were investigated. In the case of an Einstein's metric g(munu) the corresponding equations for its dual were found. The examples of Kerr-Newman geometry and the separable coordinates in 1 + 1 dimensions axe analyzed in details.
Citation - WoS: 3161
Citation - Scopus: 3290
New Fractional Derivatives With Non-Local and Non-Singular Kernel Theory and Application To Heat Transfer Model
(Vinca inst Nuclear Sci, 2016) Baleanu, Dumitru; Atangana, Abdon
In this paper a new fractional derivative with non-local and no-singular kernel is proposed. Some useful properties of the new derivative are presented and applied to solve the fractional heat transfer model.
Citation - WoS: 2
Citation - Scopus: 3
An Extension of the Clark-Ocone Formula Under Benchmark Measure for Levy Processes
(Taylor & Francis Ltd, 2012) Okur, Yeliz Yolcu
The classical Clark-Ocone theorem states that any random variable F is an element of D-1,2(W) subset of L-2 (F-T, P) can be represented as F = E[F] + integral(T)(0) E[DtF vertical bar F-t]dWd(t), where E[.vertical bar F-t] denotes the conditional expectation, W(.) is a Brownian motion with canonical filtration {Ft}(t is an element of[0,T]) and D denotes the Malliavin derivative in the direction of W. Since many applications in financial mathematics require representation of random variables with respect to risk neutral martingale measure, an equivalent martingale measure version of this theorem was stated by Karatzas and Ocone (Stoch. Stoch. Rep. 34 (1991), 187-220). In this paper, we extend these results to be valid for square integrable pure jump Levy processes with no drift and for square integrable Ito-Levy processes using Malliavin calculus and white noise analysis. This extension might be useful for some applications in finance. As an application of our result, we calculate explicitly the closest hedge strategy for the digital option whose pay-off, F = chi([H,K))(S(T)) is not an element of D-1,2(W,(N) over tilde), is square integrable and the stock price S(.) is driven by a Levy process.
Citation - WoS: 45
Citation - Scopus: 59
Analysing Sound Environment and Architectural Characteristics of Libraries Through Indoor Soundscape Framework
(Polska Akad Nauk, Polish Acad Sciences, inst Fundamental Tech Res Pas, 2016) Yorukoglu, Papatya Nur Dokmeci; Kang, Jian
This study presents the indoor soundscape framework in detail by describing the variables and factors that form an indoor soundscape study. The main objective is to introduce a new indoor soundscaping framework and systematically explain the variables that contribute to the overall evaluation of an indoor soundscape. Hence, the dependencies of physical and psychoacoustical factors of the sound environment and the spatial factors of the built entity are statistically tested. The new indoor soundscaping framework leads to an overarching evaluation perspective of enclosed sound environments, combining objective room acoustics research and noise control engineering with architectural analysis. Therefore, it is hypothesised that case spaces with certain plan organisations, volumetric relations, and spatial referencing lead to differentiated sound pressure level (SPL) and loudness (N) values. SPL and N parametric variances of the sound environments are discussed through the statistical findings with respect to the architectural characteristics of each library case space. The results show that the relation between crowd level variances and sound environment parametric values is statistically significant. It is also found that increasing the atrium height and atrium void volume, the atrium's presence as a common architectural element, and its interpenetrating reference and domain containment results in unwanted variances and acoustic formations, leading to high SPL and N values.
Citation - WoS: 2
Citation - Scopus: 3
Compatibility Assessment of Exterior Finish Coats for Insulated Walls
(2013) Düzgüneş, Arda; Tavukçuoğlu, Ayşe; Demirci, Şahinde; Örs, Kerime
New approaches are emerging in contemporary wall constructionas a result of improved understanding of building materials andtheir behaviour. Not so long ago, the accepted practice was to createimpermeable exterior walls by using moisture-proof and vapour-prooflayers in their sectional compositions. However, any failure, such as tinycracks in any one of these impermeable layers, causes accumulation ofentrapped moisture which could not escape by evaporation from the wallsurface (Hughes, 1986; Massari and Massari, 1993; Richardson, 2001). Thisresults in a decrease in the lifetime of building materials, visible defects onwall surfaces, such as discoloration, cracking, scaling and flaking on finishcoats, and unhealthy interiors (Bochen et al., 2005). The concept of the"breathing wall", therefore, gained importance in the last few decades andexternal wall compositions, allowing the passage of water vapour back andforth through it, were started to be constructed.Along with this, energy efficient buildings and improvement ofconstruction technology in this regard became a current issue incontemporary buildings. In addition to installing more efficient fuelburningequipment, the use of both thermal insulation layers andlightweight porous masonry blocks and/or panels for its walls proper,should be incorporated within the compositions of the building envelope.However, due to their high water absorption characteristics, light-weightporous masonry needs to be protected from rainwater by means ofwatertight protective coatings and/or by water repellents (Andolsun et al.2006; Kuş, 2004). For these reasons, the exterior finishing systems consistingof under- and finish-coats, having low water permeability but high watervapour permeability properties are necessary.The matter which has not yet been foreseen, even overlooked, for multilayerconstructions is "compatibility with neighbouring materials". Thecompatibility of finishing/complementing layers with the porous masonry, in fact, has vital importance for contributing to the long-term durabilityand thermal performance of masonry wall structures. However, thebasic performance and compatibility properties of those layers, such aswater vapour permeability, water impermeability, thermal resistance,dilatation, modulus of elasticity characteristics, are as yet not well known.Comprehensive studies are, therefore, needed to derive this informationso that the performance expected of such systems in providing healthyinteriors can be improved.Materials are considered to be compatible with each other if theyhave similar characteristics in terms of some physical, mechanical andcompositional properties (Sasse and Snethlage, 1997; Fassina et al., 2002;Andolsun et al., 2005, 2006; Karoglou et al., 2007). The two importantparameters of compatibility are water vapour permeability and modulus ofelasticity (MoE):-o What is required of the finish coat is to permit water vapourtransmission while resisting droplet penetration from rain or surfacewash; in other words, being essentially watertight (Kuş, 2004;Harderup, 1996; Cerny, et al., 1996). It is also necessary to ensurecontinuity in this vapour transmission property throughout allthe layers making up the wall section in order to avoid interstitialcondensation.o The compatibility assessment of a layer with its neighbouring layers interms of MoE is still under discussion. The MoE is defined as the ratioof stress to strain and indicates the deformation ability of a materialunder external forces (Timoshenko, 1970). According to studiesdiscussing this subject, the MoE of coating layers should not exceedthat of the underlying masonry (Caner, 2003; Fabbri and Grossi, 2000;Kovler and Frostig, 1998; Sasse and Sneathlage, 1997). This means that,any compatible layer should be expected to have MoE not higher thanthat of the base material which is in contact so as to prevent mechanicaldamage in any of the weaker intermediate layer(s). If not so done,failures-especially in the form of tiny cracks-are liable to develop onthe fine coat and/or on sub-layers, which is often followed by flakingand scaling.Here, a number of proprietary exterior finish coats produced in Turkeywere examined in order to determine their compatibility for insulatedmasonry walls with an emphasis on their water vapour permeability andmodulus of elasticity characteristics (Örs, 2006) (1). It was expected toreveal not only their individual material properties, but also to developawareness in architects, builders and manufacturers about the significanceof compatibility in attaining an integrated building envelope.
Citation - WoS: 10
Citation - Scopus: 10
Receiver-Aperture Averaging of Annular Beams Propagating Through Turbulent Atmosphere
(Spie-soc Photo-optical instrumentation Engineers, 2013) Kamacioglu, Canan; Baykal, Yahya; Yazgan, Erdem
For an annular beam incidence, the power scintillation index in a weakly turbulent atmosphere is derived at the receiver plane, which has a Gaussian aperture. Employing this derivation, the receiver-aperture averaging factor is evaluated. Annular beams are found more advantageous than the Gaussian beams when compared on receiver-aperture averaging basis. The analyses indicate that the effect of the aperture averaging increases as the propagation length increases. Increase in the structure constant and the secondary beam source size is observed to strengthen the effect of the aperture averaging when the primary beam source size is fixed. (C) 2013 Society of Photo-Optical Instrumentation Engineers (SPIE)
Citation - Scopus: 1
Global Stability, Periodicity, and Bifurcation Analysis of a Difference Equation
(Aip Publishing, 2023) Manuel, M. Maria Susai; Baleanu, Dumitru; Dilip, D. S.; Amalraj, J. Leo
This research aims to discuss the existence, global stability, periodicity, and bifurcation analysis of a modified version of the ecological model proposed by Tilman and Wedlin [Nature 353, 653-655 (1991)].
Citation - WoS: 30
Citation - Scopus: 34
Performance and Surface Alloying Characteristics of Cu-Cr and Cu-Mo Powder Metal Tool Electrodes in Electrical Discharge Machining
(Taylor & Francis inc, 2016) Uslan, Ibrahim; Usta, Yusuf; Cogun, Can; Gulcan, Orhan
The main objective of this study is to investigate the effect of Cu-Cr and Cu-Mo powder metal (PM) tool electrodes on electrical discharge machining (EDM) performance outputs. The EDM performance measures used in the study are material removal rate (MRR), tool electrode wear rate (EWR), average workpiece surface roughness (R-a), machined workpiece surface hardness, abrasive wear resistance, corrosion resistance, and workpiece alloyed layer depth and composition. The EDM performance of Cu-Cr and Cu-Mo PM electrodes produced at three different mixing ratios (15, 25, and 35wt% Cr or Mo), compacting pressures (P-c = 600, 700, and 800MPa), and sintering temperatures (T-s = 800, 850, and 900 degrees C) are compared with those machined with electrolytic Cu and Cu PM electrodes when machining SAE 1040 steel workpiece. Analyses revealed that tool materials were deposited as a layer over the work surface yielding high surface hardness, strong abrasion, and corrosion resistance. Moreover, the mixing ratio, P-c, and T-s affect the MRR, EWR, and R-a values.
Classification of Linked Data Sources Using Semantic Scoring
(Ieice-inst Electronics information Communication Engineers, 2018) Dogdu, Erdogan; Kodaz, Halife; Yumusak, Semih
Linked data sets are created using semantic Web technologies and they are usually big and the number of such datasets is growing. The query execution is therefore costly, and knowing the content of data in such datasets should help in targeted querying. Our aim in this paper is to classify linked data sets by their knowledge content. Earlier projects such as LOD Cloud, LODStats, and SPARQLES analyze linked data sources in terms of content, availability and infrastructure. In these projects, linked data sets are classified and tagged principally using VoID vocabulary and analyzed according to their content, availability and infrastructure. Although all linked data sources listed in these projects appear to be classified or tagged, there are a limited number of studies on automated tagging and classification of newly arriving linked data sets. Here, we focus on automated classification of linked data sets using semantic scoring methods. We have collected the SPARQL endpoints of 1,328 unique linked datasets from Datahub, LOD Cloud, LODStats, SPARQLES, and SpEnD projects. We have then queried textual descriptions of resources in these data sets using their rdfs: comment and rdfs: label property values. We analyzed these texts in a similar manner with document analysis techniques by assuming every SPARQL endpoint as a separate document. In this regard, we have used WordNet semantic relations library combined with an adapted term frequency-inverted document frequency (tfidf) analysis on the words and their semantic neighbours. In WordNet database, we have extracted information about comment/label objects in linked data sources by using hypernym, hyponym, homonym, meronym, region, topic and usage semantic relations. We obtained some significant results on hypernym and topic semantic relations; we can find words that identify data sets and this can be used in automatic classification and tagging of linked data sources. By using these words, we experimented different classifiers with different scoring methods, which results in better classification accuracy results.
Citation - WoS: 1
Citation - Scopus: 2
Evaluation of Semantic Relatedness Measures for Turkish Language
(Springer international Publishing Ag, 2018) Sopaoglu, Ugur; Ercan, Gonenc
The problem of quantifying semantic relatedness level of two words is a fundamental sub-task for many natural language processing systems. While there is a large body of research on measuring semantic relatedness in the English language, the literature lacks detailed analysis for these methods in agglutinative languages. In this research, two new evaluation resources for the Turkish language are constructed. An extensive set of experiments involving multiple tasks: word association, semantic categorization, and automatic WordNet relationship discovery are performed to evaluate different semantic relatedness measures in the Turkish language. As Turkish is an agglutinative language, the morphological processing component is important for distributional similarity algorithms. For languages with rich morphological variations and productivity, methods ranging from simple stemming strategies to morphological disambiguation exists. In our experiments, different morphological processing methods for the Turkish language are investigated.
Citation - WoS: 22
Citation - Scopus: 20
Scintillation Index of Optical Spherical Wave Propagating Through Biological Tissue
(Taylor & Francis Ltd, 2017) Baykal, Yahya; Arpali, Caglar; Arpali, Serap Altay
Effects of the tissue turbulence on the propagation of an optical spherical wave are analysed. For this purpose, scintillation index of an optical spherical wave which is propagating in a soft tissue is formulated and evaluated in weakly turbulent soft tissue. Scintillation index of the optical spherical wave is examined against the changes in the tissue parameters which are the tissue length between the optical spherical wave source and the detector, random variations in the refractive index of the tissue and the outer scale of the tissue turbulence. According to our graphical outputs, it is observed that increase in the random variations of the refractive index of the tissue results in an increase in the scintillation index at a certain realization of the turbulence spectrum. On the other hand, larger outer scales and longer tissue lengths yield larger scintillations. The variation of the scintillation index of the optical spherical wave versus the wavelength is also investigated. It is found that at small tissue lengths, wavelength has almost no effect on the scintillations; however, when the tissue length reaches a certain value, shorter wavelengths give rise to larger intensity fluctuations.
Citation - WoS: 10
Citation - Scopus: 15
Super Metric Spaces
(Univ Nis, Fac Sci Math, 2022) Karapinar, Erdal; Khojasteh, Farshid
The aim of this paper is to propose a new generalization of metric space which may open a new framework. As an application, we consider the analog of Banach contraction mapping principle that works properly.
Citation - WoS: 32
Citation - Scopus: 52
A Generalized Q-Mittag Function by Q-Captuo Fractional Linear Equations
(Hindawi Ltd, 2012) Baleanu, Dumitru; Abdeljawad, Thabet; Benli, Betul
Some Caputo q-fractional difference equations are solved. The solutions are expressed by means of a new introduced generalized type of q-Mittag-Leffler functions. The method of successive approximation is used to obtain the solutions. The obtained q-version of Mittag-Leffler function is thought as the q-analogue of the one introduced previously by Kilbas and Saigo (1995).
Citation - WoS: 13
Citation - Scopus: 17
The Dynamics of New Dual-Mode Kawahara Equation: Interaction of Dual-Waves Solutions and Graphical Analysis
(Iop Publishing Ltd, 2020) Jaradat, Imad; Ali, Mohammed; Baleanu, Dumitru; Alquran, Marwan
In this paper, we introduce a new dual-mode Kawahara equation with new dissipative, nonlinearity and interaction phase velocity parameters. Also, we study the solutions of this model by using the tanh-scheme, Kudryashov-scheme and the sine-cosine function methods. Dynamics and shapes of the obtained solutions are illustrated by using graphical 2D and 3D plots. Finally, the interaction of the obtained dual-waves has been linked with the change of the phase-velocity parameter.
Citation - WoS: 16
Citation - Scopus: 24
Architectural Design Quality Assessment Based on Analytic Hierarchy Process: a Case Study (1)
(Middle East Technical Univ, 2014) Gultekin, A. Tanju; Prins, Matthijs; Topcu, Y. Ilker; Harputlugil, Timucin
Citation - WoS: 4
Citation - Scopus: 5
Explicit Deconvolution of Well Test Data Dominated by Wellbore Storage
(Hindawi Ltd, 2014) Hashemi, A.; Razminia, A.; Baleanu, D.; Razminia, K.
This paper addresses some methods for interpretation of oil and gas well test data distorted by wellbore storage effects. Using these techniques, we can deconvolve pressure and rate data from drawdown and buildup tests dominated by wellbore storage. Some of these methods have the advantage of deconvolving the pressure data without rate measurement. The two important methods that are applied in this study are an explicit deconvolution method and a modification of material balance deconvolution method. In cases with no rate measurements, we use a blind deconvolution method to restore the pressure response free of wellbore storage effects. Our techniques detect the afterflow/unloading rate function with explicit deconvolution of the observed pressure data. The presented techniques can unveil the early time behavior of a reservoir system masked by wellbore storage effects and thus provide powerful tools to improve pressure transient test interpretation. Each method has been validated using both synthetic data and field cases and each method should be considered valid for practical applications.
Citation - WoS: 24
Citation - Scopus: 23
Scintillation Index of Flat-Topped Gaussian Laser Beam in Strongly Turbulent Medium
(Optical Soc Amer, 2011) Gercekcioglu, Hamza; Baykal, Yahya
In a strongly turbulent medium, the scintillation index of flat-topped Gaussian beams is derived and evaluated. In the formulation, unified solution of Rytov method is utilized. Our results correctly reduce to the existing strong turbulence scintillation index of the Gaussian beam, and naturally to spherical and plane wave scintillations. Another checkpoint of our result is the scintillation index of flat-topped Gaussian beams in weak turbulence. Regardless of the order of flatness, scintillations of flat-topped Gaussian beams in strong turbulence are found to be determined mainly by the small-scale effects. For large-sized beams in moderate and strongly turbulent medium, flatter beams exhibit smaller scintillations. (C) 2011 Optical Society of America
Citation - WoS: 2
Citation - Scopus: 8
Data Mining Applications in Risk Research: a Systematic Literature Review
(Sage Publications inc, 2025) Sicakyuz, Cigdem; Edalatpanah, Seyyed Ahmad; Pamucar, Dragan
Despite the rising literature on data mining (DM) approaches, there is a lack of a complete literature review and categorization system within risk research. This paper presents the first recognized academic literature review on the application of data mining tools in risk research provides an up-to-date SCOPUS literature database. Based on bibliometric analysis, 5422 papers related torisk were identified from a total of 77,410 studies on data mining and thoroughly analyzed. Each of the selected 5422 papers was classified into four risk categories: global risk, public health risk, molecular and biomedical risk, and pharmaceutical risk. Each primary risk category was further subdivided to highlight the specific research focuses within each domain. Global risks encompass business, environmental, and social risks. Scholars have predominantly focused on the banking, market, and construction sectors within business risk, while environmental risk includes catastrophe-related risks. Social risks encompass areas such as education, traffic safety, and transportation concerns. Clinical data is usually employed in public health risk research, while various radiomic databases are utilized in genetic and molecular biology research. In pharmaceutical research, DM is primarily used to detect adverse drug effects. According to the findings of this review, the fields of computer science and medicine received the most significant research attention. The review also discusses limitations and provides a roadmap to guide future research, aiming to enhance knowledge development related to the application of data mining techniques in risk-related studies.

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