Browsing by Author "İdemen, Mehmet Mithat"
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Analysis of layered media terminated with an impedance surface varying in lateral directions
İdemen, Mehmet Mithat; Alkumru, Ali (SpringerVerlag Berlin, 2000)Determination of the constitutive parameters of a region from data provided by remote sensing is an extremely interesting and important topic from various points of view. In a large class of problems of this type, the ... 
Comments on "upper cutoff frequency of the bound wave and new leaky wave on the slotline"
İdemen, Mehmet Mithat; Büyükaksoy, İbrahim Alinur (IEEEINST Electrical Electronics Engineers Inc, 199905)[No abstract available] 
The concept of confluence and the edge conditions for a wedge bounded by material sheets
İdemen, Mehmet Mithat (IEEE, 2000)The edge conditions which dictate the asymptotic behaviour of the electromagnetic field near the edges play a crucial role in solving boundaryvalue problems involving boundaries having edges, in analytical studies they ... 
The confluent edge and tip singularities of the electromagnetic wave on material sheets
İdemen, Mehmet Mithat (2004)The singularities of the electromagnetic wave at sharp edges and tips effect the performance of electric devices and, hence, requires serious precautions at both the design and production stages. Furthermore, in theoretical ... 
Confluent edge conditions for the electromagnetic wave at the edge of a wedge bounded by material sheets
İdemen, Mehmet Mithat (Elsevier ScienceWave Motion, 200007)The edge conditions which dictate the asymptotic behaviour of the electromagnetic field near the edges play a crucial role in solving boundaryvalue problems involving boundaries having edges. In analytical studies they ... 
Confluent tip singularity of the electromagnetic field at the apex of a material cone
İdemen, Mehmet Mithat (Elsevier Science, 200309)The tip singularity of the electromagnetic field at the apex of a cone (conical sheet) is investigated in its most general framework. To this end one considers, without loss of generality, a circularly symmetric cone which ... 
Crosssectional thermoacoustic imaging using multilayer cylindrical media
Elmas, Demet; Ünalmış Uzun, Banu; İdemen, Mehmet Mithat; Karaman, Mustafa (IEEE, 20171110)For crosssectional twodimensional thermoacustic imaging of breast and brain, we explored solution of the wave equation using layered tissue model consisting of concentric annular layers on a cylindrical crosssection. ... 
Çok katmanlı düzlemsel ortam için termoakustik dalga denkleminin çözümü
Bayıntır, Hazel; Ünalmış Uzun, Banu; İdemen, Mehmet Mithat; Karaman, Mustafa (IEEE, 20170627)Bu çalışmada, farklı akustik parametrelere sahip çok katmanlı düzlemsel ortam için tüm katmanlarda kaynak dağılımı olduğu varsayımı altında termoakustik dalga denkleminin analitik olarak düz ve ters çözümü elde edilmiştir. ... 
Çok katmanlı silindirik yapılar için termoakustik dalga denkleminin ters çözümü
Elmas, Demet; Ünalmış Uzun, Banu; İdemen, Mehmet Mithat; Karaman, Mustafa (IEEE, 20170627)Termoakustik görüntüleme, elektromanyetik enerji uyarımı ile ultrason dalgaları oluşumunu sağlayan yeni bir yöntemdir. Bu sistemin görüntüleme işlemi termoakustik dalga denkleminin ters çözümüne dayanmaktadır. Ters çözümde ... 
Derivation of the Lorentz transformation from the Maxwell equations
İdemen, Mehmet Mithat (Vsp BV, 2005)The Special Theory of Relativity had been established nearly one century ago to conciliate some seemingly contradictory concepts and experimental results such as the Ether, universal time, contraction of dimensions of ... 
Diffraction of twodimensional highfrequency electromagnetic waves by a locally perturbed twopart impedance plane
İdemen, Mehmet Mithat; Alkumru, Ali (Elsevier Science BV, 200506)During the second half of the last century mixed boundaryvalue problems had been an appealing research subject for both mathematicians and engineers. Among this kind of problems those connected with wave propagation in ... 
Diffraction of twodimensional highfrequency electromagnetic waves by a locally perturbed twopart impedance plane
İdemen, Mehmet Mithat; Alkumru, Ali (2004)Among the wave propagation problems, those connected with halfspaces bounded by sectionally homogeneous boundaries take important place because they are motivated by microwave applications. If the boundary are of three ... 
A generalization of the WienerHopf approach to direct and inverse scattering problems connected with nonhomogeneous halfspaces bounded by npart boundaries
İdemen, Mehmet Mithat; Alkumru, Ali (Oxford Univ Press, 200008)The classical WienerHopf method connected with mixed twopart boundaryvalue problems is generalized to cover npart boundaries. To this end one starts from an adhoc representation for the Green function, which involves ... 
Influence of the velocity on the energy patterns of moving scatterers
İdemen, Mehmet Mithat; Alkumru, Ali (Taylor & Francis, 2004)Parallel to the developments in the communication through space vehicles achieved during the last two decades, the scattering problems connected with moving objects became more and more important from both theoretical and ... 
Meme kanserinin tanısı ve izlenmesi için mikrodalga uyarımlı termoakustik görüntüleme
Karaman, Mustafa; Özdemir, Özgür; Yazgı, Metin; Şimşek, Serkan; Doğan, Aydın; Aksun, Muhammet İrşadi; Ünalmış Uzun, Banu (Tübitak, 201710)Termoakustik görüntüleme, iyonize etkisi olmayan, noktasal ve kontrast çözünürlüğü yüksek yeni bir hibrit görüntüleme modalitesi olup kanserinin erken tanısı ve izlenmesi için uygun bir tekniktir. Bu teknik bilimsel, ... 
A new method for the source localization in sectionally homogeneous bounded domains involving finitely many inner interfaces of arbitrary shapes
İdemen, Mehmet Mithat; Alkumru, Ali (PergamonElsevier Science, 200105)A new method to localize a static point source buried in a nonhomogeneous bounded domain composed of finitely many homogeneous parts separated by interfaces of arbitrary shapes was established. The source can be a simple ... 
On a class of functional equations of the WienerHopf type and their applications in npart scattering problems
İdemen, Mehmet Mithat; Alkumru, Ali (Oxford Univ Press, 200312)An asymptotic theory for the functional equation Kphi=f, where K : X>Y stands for a matrixvalued linear operator of the form K=K1P1+K2P2+...+KnPn, is developed. Here X and Y refer to certain Hilbert spaces, {Palpha} ... 
Scattering of electromagnetic waves by a rectangular impedance cylinder
Topsakal, Erdem; Büyükaksoy, İbrahim Alinur; İdemen, Mehmet Mithat (Elsevier Science, 200004)A uniformly valid asymptotic solution is developed for the diffraction of a highfrequency wave by an infinitely long rectangular cylinder having different impedance walls. The incident wave is generated by a line source ... 
Thermoacoustic image reconstruction based on layered tissue model
Bayıntır, Hazel; İdemen, Mehmet Mithat; Ünalmış Uzun, Banu; Karaman, Mustafa; Elmas, Demet (SPIEInt Soc Optical Engineering, 2017)We derived analytical forward and inverse solution of thermoacoustic wave equation for inhomogeneous multi layered planar and cylindrical mediums with the source distribution existing in all layers. These solutions are ... 
Tip singularity of the electromagnetic field at the apex of a material cone
İdemen, Mehmet Mithat (SpringerVerlag Berlin, 2004)The tip Singularity of the electromagnetic field at the apex of a cone is investigated in its most general framework. To this end one considers, without loss of generality, a circularly symmetric cone which separates two ...