TR-Dizin
Permanent URI for this collectionhttps://ada.atilim.edu.tr/handle/123456789/21
Browse
Browsing TR-Dizin by Scopus Q "Q2"
Now showing 1 - 20 of 21
- Results Per Page
- Sort Options
Book Review Citation Count: 0Publication Citation Count: 4China-Africa relations in the 21st century : Engagement,compromise and controversy(2009) Uchehara, E.kieranÇin’in Afrika ile ilgili dış politika gündemi, gelişmekte olan ülkeler arasındaki işbirliğini artırma ve yükselen bir süper güç olarak statüsünü gösterme hamlesinin bir parçasını oluşturmaktadır. 2000 Pekin Deklarasyonu ve Çin-Afrika Ekonomik ve Siyasi işbirliği Programı yenilenen ilişkilerin temelini oluşturmaktadır. Çin, Afrika ile tüm karşılıklı ilişki alanlarında Afrika ile farklı ve çeşitli ilişkiler geliştirmiştir. Ancak Çin’in büyüyen sanayisinin ihtiyaç duyduğu Afrika’nın maden ve enerji kaynakları, 21. yüzyılda Çin’in Afrika ile iyi ilişkiler kurmasının ana sebebidir. Çin’in Afrika’daki ticaret ve yatırımındaki hızlı artış, kıtanın kalkınması ile ilgili fırsatlar ve zorlukların yapısına ilişkin ve Batı ile olduğu gibi yeni-sömürgeci tarzı ilişkilerin gelişme ihtimalinin olup olmadığı konusunda akademisyenler ve siyasiler arasındaki uyuşmazlıkları açığa çıkarmıştır. Kısmen ekonomik asimetrilerden kaynaklanan ticari ve yatırım ilişkilerindeki dengesizlik, Çin’in Afrikalı baskıcı yönetimleri kınamaması ve iyi yönetilmeyen ekonomiler; kendisine hizmet eden ve kısa dönem kazanımlardan etkilenen bir dış ekonomik politikayı işaret etmektedir.Article Citation Count: 0A convergent two-level linear scheme for the generalized Rosenau–KdV–RLW equation(Tubitak Scientific & Technological Research Council Turkey, 2019) Aydın, Ayhan; MathematicsA new convergent two-level finite difference scheme is proposed for the numerical solution of initial valueproblem of the generalized Rosenau–KdV–RLW equation. The new scheme is second-order, linear, conservative, andunconditionally stable. It contains one free parameter. The impact of the parameter to error of the numerical solutionis studied. The prior estimate of the finite difference solution is obtained. The existence, uniqueness, and convergence ofthe scheme are proved by the discrete energy method. Accuracy and reliability of the scheme are tested by simulating thesolitary wave graph of the equation. Wave generation subject to initial Gaussian condition has been studied numerically.Different wave generations are observed depending on the dispersion coefficients and the nonlinear advection term.Numerical experiments indicate that the present scheme is conservative, efficient, and of high accuracy, and well simulatesthe solitary waves for a long time.Article Citation Count: 0Exact and nonstandard finite difference schemes for the Burgers equation B(2, 2)(Tubitak Scientific & Technological Research Council Turkey, 2021) Köroğlu, Canan; Aydın, Ayhan; MathematicsIn this paper, we consider the Burgers equation B(2, 2) . Exact and nonstandard finite difference schemes(NSFD) for the Burgers equation B(2, 2) are designed. First, two exact finite difference schemes for the Burgers equationB(2, 2) are proposed using traveling wave solution. Then, two NSFD schemes are represented for this equation. Thesetwo NSFD schemes are compared with a standard finite difference (SFD) scheme. Numerical results show that the NSFDschemes are accurate and efficient in the numerical simulation of the kink-wave solution of the B(2, 2) equation. We seethat although the SFD scheme yields numerical instability for large step sizes, NSFD schemes provide reliable results forlong time integration. Local truncation errors show that the NSFD schemes are consistent with the B(2, 2) equation.Article Citation Count: 0An exhaustive computer search for finding new curves with many points among fibre products of two Kummer covers over $\\Bbb{F}_5$ and $\\Bbb{F}_7$(2013) Özbudak, Ferruh; Temür, Burcu Gülmez; Yayla, Oğuz; MathematicsIn this paper we make an exhaustive computer search for finding new curves with many points among fibre products of 2 Kummer covers of the projective line over F5 and F7 . At the end of the search, we have 12 records and 6 new entries for the current Table of Curves with Many Points. In particular, we observe that the fibre product $y^3_1$ = $\\frac {5(x+2)(x +5)} {x}$, $y^3_2$ $\\frac {3x^2(x +5)} {x + 3}$ over F7 has genus 7 with 36 rational points. As this coincides with the Ihara bound, we conclude that the maximum number N7 (7) of F7 -rational points among all curves of genus 7 is 36. Our exhaustive search has been possible because of the methods given in the recent work by Özbudak and Temür (2012) for determining the number of rational points of such curves.Article Citation Count: 1An expansion result for a Sturm-Liouville eigenvalue problem with impulse(2010) Faydaoğlu, Şerife; Guseınov, Gusein Sh.The paper is concerned with an eigenvalue problem for second order differential equations with impulse. Such a problem arises when the method of separation of variables applies to the heat conduction equation for two-layered composite. The existence of a countably infinite set of eigenvalues and eigenfunctions is proved and a uniformly convergent expansion formula in the eigenfunctions is established.Article Citation Count: 0Fedja’s proof of Deepti’s inequality(Tubitak Scientific & Technological Research Council Turkey, 2018) Ostrovska, Sofiya; Turan, Mehmet; MathematicsThe paper aims to present, in a systematic way, an elegant proof of Deepti’s inequality. Both the inequalityand various ideas concerning the issue were discussed on the Mathoverflow website by a number of users, but none haveappeared in the literature thus far. In this work, suggestions pertaining to users ‘Deepti’ and ‘fedja’ are traced, whencethe title. The results or the paper are new, and the proof is divided into a series of statements, many of which are ofinterest in themselves.Publication Citation Count: 0Field extensions having the unique subfield property, and G-Cogalois extensions(2002) Albu, TomaWe present a short proof, based on Cogalois Theory, of a result due to Acosta de Orozco and Vélez (1982, J. Number Theory 15, 388-405) characterizing separable simple radical field extensions with the unique subfield property, and prove that these extensions are precisely the simple G--Cogalois extensions with a cyclic Kneser group.Article Citation Count: 0Hydrogen implantation effects on the electrical and optical properties of InSe thin films(2012) Qasrawı, Atef Fayez; Ilaıwı, Khaled Faysal; Polımenı, AntonioThe effects of hydrogen ion implantation on the structural, electrical and optical properties of amorphous InSe thin films have been investigated. X-ray diffraction analysis revealed no change in the structure of the films. An implantation of 7.3 × $10^{18}$ ions/$cm^2$ decreased the electrical conductivity by three orders of magnitude at 300 K. Similarly, the conductivity activation energy, which was calculated in the temperature range of 300–420 K, decreased from 210 to 78 meV by H-ion implantation. The optical measurements showed that the direct allowed transitions energy band gap of amorphous InSe films has decreased from 1.50 to 0.97 eV by implantation. Furthermore, significant decreases in the dispersion and oscillator energy, static refractive index and static dielectric constants are also observed by hydrogen implantation.Editorial Citation Count: 0Introduction: Marxifying IR, IRifying Marxism(International Relations Council of Turkey, 2024) Yalvaç,F.; Joseph,J.; International RelationsAlthough the neglect of Marxism has been a pervasive characteristic of IR theory, there has been a marked revival of interest in Marxism. Marx’s materialist insights into the general historical development of societies, as well as his critique of capitalism and political economy, have served as alternative starting points for different critical approaches to IR and offers a welcome alternative to neorealism, constructivism, and poststructuralism that have dominated IR for several decades. Marxism provides a redefinition of IR by focusing on changes in material circumstances, historical conditions, and society instead of assuming unchanging and fixed structures of anarchy or the state. Marx’s analysis and insights into the dynamics of international relations have become even more important given the ongoing crisis of neoliberal capitalism, the rise of authoritarianism, right-wing nationalist populisms, and the racial and gendered subordinations accompanying them pointing to the importance of Marxifying IR and IRifying Marxism. © 2024, International Relations Council of Turkey. All rights reserved.Article Citation Count: 1A note on the generalized Matsumoto relation(2017) Dalyan, Elif; Medetoğulları, Elif; Pamuk, Mehmetcik; MathematicsWe give an elementary proof of a relation, first discovered in its full generality by Korkmaz, in the mapping class group of a closed orientable surface. Our proof uses only the well-known relations between Dehn twists.Article Citation Count: 0Number fields and divisible groups via model theory(Tubitak Scientific & Technological Research Council Turkey, 2021) CELIK, Sermin C. A. M.; GORAL, HaydarIn this note, we first show that solutions of certain equations classify the number fields lying in imaginary quadratic number fields. Then, we study divisible groups with a predicate. We show that these structures are not simple and have the independence property under some natural assumptions.Article Citation Count: 1Number of pseudo–Anosov elements in the mapping class group of a four–holed sphere(2010) Ozan, Ferihe Atalan; Korkmaz, Mustafa; MathematicsWe compute the growth series and the growth functions of reducible and pseudo-Anosov elements of the pure mapping class group of the sphere with four holes with respect to a certain generating set. We prove that the ratio of the number of pseudo-Anosov elements to that of all elements in a ball with center at the identity tends to one as the radius of the ball tends to infinity.Article Citation Count: 3On strongly autinertial groups(Tubitak Scientific & Technological Research Council Turkey, 2018) Onur, Cansu Betin; MathematicsA subgroup X of G is said to be inert under automorphisms (autinert) if |X : $X^\\alpha$ ∩ X| is finite for allα ∈ Aut(G) and it is called strongly autinert if | < X, $X^\\alpha$ >: X| is finite for all α ∈ Aut(G). A group is calledstrongly autinertial if all subgroups are strongly autinert. In this article, the strongly autinertial groups are studied. Wecharacterize such groups for a finitely generated case. Namely, we prove that a finitely generated group G is stronglyautinertial if and only if one of the following hold:i) G is finite;ii) G = ⟨a⟩ ⋉ F where F is a finite subgroup of G and ⟨a⟩ is a torsion-free subgroup of G.Moreover, in the preliminary part, we give basic results on strongly autinert subgroups.Article Citation Count: 0On symmetric monomial curves in $\\Bbb{P}^3$(2009) Şahin, Mesut; MathematicsIn this paper, we give an elementary proof of the fact that symmetric arithmetically Cohen-Macaulay monomial curves are set-theoretic complete intersections. The proof is constructive and provides the equations of the surfaces cutting out the monomial curve.Article Citation Count: 2Self-adjoint boundary value problems on time scales and symmetric Green' s functions(2005) Guseınov, Gusein Sh.In this note, higher order self-adjoint differential expressions on time scales, and associated with them self-adjoint boundary conditions, are discussed. The symmetry peoperty of the corresponding Green's functions is emphasizedArticle Citation Count: 1A short note on some arithmetical properties of the integer part of ap(Tubitak Scientific & Technological Research Council Turkey, 2019) Akbal, Yıldırım; MathematicsLet $a>0$ be an irrational number. We study some of the arithmetical properties of ${\\{\\lfloor ap\\rfloor\\}}_{p=2}^\\infty$ where pdenotes a prime number and $\\lfloor x\\rfloor$ denotes the largest integer not exceeding x.Article Citation Count: 0The Socio-Economic Impact of the Covid-19 Pandemic on Syrian Refugees in Turkey(Uluslararasi Iliskiler Konseyi dernegi, 2024) Memisoglu, Fulya; Ozkil, Altan; Kilinc, Tuna; Aviation ManagementBuilding upon empirical research, this study examines the socio-economic impact of the Covid-19 pandemic on Syrian refugees in Turkey by analyzing its implications on employment, livelihood opportunities, and social cohesion. More specifically, it focuses on the experiences of Syrian refugees to examine the ways in which they exert their agency to cope with the structural constraints when faced with 'multiple crises' in host countries, intersecting with the dynamics of a 'normalized refugee crisis'. Our findings from fieldwork conducted in the top six refugee-hosting cities reveal that loss of jobs, limited access to decent work, increased dependency on external financial assistance, and social exclusion have been some of the most acute effects of the pandemic on refugees. Meanwhile, the perceived effects that refugees have on the host community's welfare trigger problems that impede social cohesion. All in all, the study intends to highlight the far-reaching effects of the pandemic beyond its direct health implications by addressing the structural vulnerability of refugees and the importance of providing an enabling environment for socio-economic self-reliance.Article Citation Count: 0Solving an initial boundary value problem on thesemiinfinite interval(2016) Atalan, Ferihe; Guseınov, Gusein Sh.; MathematicsWe explore the sign properties of eigenvalues and the basis properties of eigenvectors for a special quadratic matrix polynomial and use the results obtained to solve the corresponding linear system of differential equations on the half line subject to an initial condition at t = 0 and a condition at t = ∞.Article Citation Count: 0Some permutations and complete permutation polynomials over finite fields(Tubitak Scientific & Technological Research Council Turkey, 2019) Ongan, Pınar; Temür, Burcu Gülmez; MathematicsIn this paper we determine $b\\in F_{q^n}^\\ast$ for which the polynomial $f(x)=x^{s+1}+bx\\in F_{q^n}\\left[x\\right]$ is a permutationpolynomial and determine $b\\in F_{q^n}^\\ast$ for which the polynominal $f(x)=x^{s+1}+bx\\in F_{q^n}\\left[x\\right]$ is a complete permutationpolynomial where $s=\\frac{q^n-1}t,\\;t\\in\\mathbb{Z}^+$ such that $\\left.t\\;\\right|\\;q^n-1$.
