Scopus İndeksli Yayınlar Koleksiyonu

Permanent URI for this collectionhttps://hdl.handle.net/20.500.12416/8651

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Now showing 1 - 10 of 28
  • Article
    Citation - WoS: 3
    Citation - Scopus: 3
    Simulating systems of Ito? SDEs with split-step (?, ?)-Milstein scheme
    (Amer Inst Mathematical Sciences-AIMS, 2022) Ranjbar, Hassan; Torkzadeh, Leila; Baleanu, Dumitru; Nouri, Kazem
    In the present study, we provide a new approximation scheme for solving stochastic differential equations based on the explicit Milstein scheme. Under sufficient conditions, we prove that the split-step (alpha, beta)-Milstein scheme strongly convergence to the exact solution with order 1.0 in mean-square sense. The mean-square stability of our scheme for a linear stochastic differential equation with single and multiplicative commutative noise terms is studied. Stability analysis shows that the mean-square stability of our proposed scheme contains the mean-square stability region of the linear scalar test equation for suitable values of parameters alpha, beta. Finally, numerical examples illustrate the effectiveness of the theoretical results.
  • Article
    Citation - WoS: 11
    Citation - Scopus: 18
    Analysis of the family of integral equation involving incomplete types of I and Ī-functions
    (Taylor & Francis Ltd, 2023) Bhatter, Sanjay; Jangid, Kamlesh; Kumawat, Shyamsunder; Baleanu, Dumitru; Suthar, D.L.; Purohit, Sunil Dutt
    The present article introduces and studies the Fredholm-type integral equation with an incomplete I-function (IIF) and an incomplete (Formula presented.) -function (I (Formula presented.) F) in its kernel. First, using fractional calculus and the Mellin transform principle, we solve an integral problem involving IIF. The idea of the Mellin transform and fractional calculus is then used to analyse an integral equation using the incomplete (Formula presented.) -function. This is followed by the discovery and investigation of several important exceptional cases. This article's general discoveries may yield new integral equations and solutions. The desired outcomes seem to be very helpful in resolving many real-world problems whose solutions represent different physical phenomena. And also, findings help solve introdifferential, fractional differential, and extended integral equation problems.
  • Article
    Low-diameter topic-based pub/sub overlay Network Construction with minimum–maximum node Degree
    (PeerJ Inc., 2021) Yumusak, Semih; Layazali, Sina; Öztoprak, Kasım; Hassanpour, Reza
    In the construction of effective and scalable overlay networks, publish/subscribe (pub/sub) network designers prefer to keep the diameter and maximum node degree of the network low. However, existing algorithms are not capable of simultaneously decreasing the maximum node degree and the network diameter. To address this issue in an overlay network with various topics, we present herein a heuristic algorithm, called the constant-diameter minimum–maximum degree (CD-MAX), which decreases the maximum node degree and maintains the diameter of the overlay network at two as the highest. The proposed algorithm based on the greedy merge algorithm selects the node with the minimum number of neighbors. The output of the CD-MAX algorithm is enhanced by applying a refinement stage through the CD-MAX-Ref algorithm, which further improves the maximum node degrees. The numerical results of the algorithm simulation indicate that the CD-MAX and CD-MAX-Ref algorithms improve the maximum node-degree by up to 64% and run up to four times faster than similar algorithms.
  • Article
    Kronik hastalıklarda duygu düzenleme: Kalp ve damar sistemi hastalıkları, kanser, migren, fibromiyalji ve sedef hastalığı üzerine bir derleme
    (Association for Clinical Psychology Research, 2023) Tuna, Ezgi
    Duygu düzenleme; duyguların oluşumunu, çeşidini, yoğunluğunu, zaman akışındaki yerini ve ifadesini belirlediğimiz bilinçli ve bilinçdışı süreçleri içermektedir. Yapılan çalışmalar, duygu düzenlemenin ruh sağlığı üzerindeki kritik etkisinin yanı sıra, fiziksel sağlık üzerinde de önemli etkilerinin olduğuna işaret etmektedir. Özellikle kronik hastalığı olan bireylerde duyguların nasıl düzenlendiği öz-bakım, tedaviye uyum ve stres kaynaklarıyla baş etme gibi pek çok süreci etkileyerek hem fiziksel hem de psikolojik iyilik hali için belirleyici olmaktadır. Bunun yanında duygu düzenlemeyle ilgili sorunların bazı kronik hastalıkların etiyolojisinde ve seyrinde rol oynadığına dair kanıtlar mevcuttur. Bu derleme makalesinin amacı, kronik hastalıklarda duygu ve duygu düzenlemeye dair bilimsel çalışma bulgularını özetlemek ve mevcut çalışmalardaki eksiklere değinerek gelecek çalışmalar için öneriler sunmaktır. Bu amaçla, duygular ve sağlık ilişkisine dair mekanizmaların kısaca özetlenmesinin ardından; sırasıyla, kalp ve damar sistemi (KDS) hastalıkları, kanser, migren, fibromiyalji ve sedef hastalığında duygu düzenlemeyle ilgili bulgulara değinilmiştir. Özetle, KDS hastalıklarının etiyolojisinde duygu ve duygu düzenlemenin rolüne dair kanıtların güçlü olduğu görülmekteyken, kanser için etiyolojiye dair bulguların çelişkili olduğu söylenebilir. Migren, sedef hastalığı ve fibromiyalji için ise çalışma bulguları ilişkisel niteliktedir. Genel olarak çalışmalar kronik hastalığı olanlarda olmayanlara göre duygu düzenleme sürecinde aksaklıklar olduğunu göstermektedir. Hastalar arasında işlevsel duygu düzenleme stratejilerinin daha az kullanımı; psikopatoloji belirtileri, bedensel belirtiler ve düşük yaşam kalitesi gibi olumsuz sonuçlarla ilişkilendirilmiştir. Duygu düzenleme süreçlerinin kronik hastalıklardaki rolünün anlaşılması, önleyici çalışmaların planlanması ve kronik hastalığı olan bireylerin yaşam kalitesini arttıracak müdahalelerin geliştirilmesinde rehberlik etmesi açısından önemlidir. Makale, alanyazının genel bir değerlendirmesi ve öneriler ile sona ermektedir.
  • Article
    Industry 4.0 Readiness of SMEs: Active Participants or Silent Audience of the Revolution?
    (Sosyoekonomi Soc, 2023) Karapolatgil, Ahmet Anıl; Sener, Irge
    Günümüzde Dördüncü Sanayi Devriminin teknolojik sonuçları tüm örgütleri etkilemektedir. Fakat KOBİ’lerin güncel tepkileri nadiren araştırılmıştır. Bu nedenle, bu çalışmada KOBİ’lerin güncel konumlarına odaklanılmış ve Endüstri 4.0 teknolojileri karşısındaki hazırlıklarının ve farkındalıklarının tespiti amaçlanmıştır. Çalışmanın örneklemini oluşturan Ankara’da faaliyet gösteren 44 KOBİ yöneticisi ile yarı yapılandırılmış mülakatlar gerçekleştirilmiş olup, içerik analizi ile 3 ana tema belirlenmiştir. Araştırmanın bulguları belirlenen ana temalar kapsamında incelenmiştir. Bu kapsamda, örneklemde yer alan KOBİ’lerin Endüstri 4.0 için düşük farkındalığa sahip oldukları ve hazırlıklarının yetersiz olduğu sonucuna ulaşılmıştır.
  • Article
    δ-β-Gabor integral operators for a space of locally integrable generalized functions
    (Springer, 2020) Al-Omari, Shrideh Khalaf; Baleanu, Dumitru; Nisar, Kottakkaran Sooppy
    In this article, we give a definition and discuss several properties of the δ-β-Gabor integral operator in a class of locally integrable Boehmians. We derive delta sequences, convolution products and establish a convolution theorem for the given δ-β-integral. By treating the delta sequences, we derive the necessary axioms to elevate the δ-β-Gabor integrable spaces of Boehmians. The said generalized δ-β-Gabor integral is, therefore, considered as a one-to-one and onto mapping continuous with respect to the usual convergence of the demonstrated spaces. In addition to certain obtained inversion formula, some consistency results are also given.
  • Article
    The first observation of memory effects in the infrared (FT-IR) measurements: Do successive measurements remember each other?
    (Public Library Science, 2014) Nigmatullin, Raoul R.; Osokin, Sergey I.; Baleanu, Dumitru; Al-Amri, Sawsan; Azam, Ameer; Memic, Adnan
    Over the past couple of decades there have been major advances in the field of nanoscience and nanotechnology. Many applications have sprouted from these fields of research. It is essential, given the scale of the materials, to attain accurate, valid and reproducible measurements. Material properties have shown to be a function of their size and composition. Physiochemical properties of the nanomaterials can significantly alter material behavior compared to bulk counterparts. For example, metal oxide nanoparticles have found broad applications ranging from photo-catalysis to antibacterial agents. In our study, we synthesized CuO nanoparticles using well established sol-gel based methods with varying levels of Ni doping. However, upon analysis of measured infrared data, we discovered the presence of quasi-periodic (QP) processes. Such processes have previously been reported to be tightly associated with measurement memory effects. We were able to detect the desired QP process in these measurements from three highly accurate repetitive experiments performed on each Ni (1-7%) doped CuO sample. In other words, successive measurements performed in a rather short period of time remember each other at least inside a group of neighboring measurements.
  • Article
    The analytical analysis of nonlinear fractional-order dynamical models
    (Amer Inst Mathematical Sciences-AIMS, 2021) Xu, Jiabin; Khan, Hassan; Shah, Rasool; Alderremy, A. A.; Aly, Shaban; Baleanu, Dumitru
    The present research paper is related to the analytical solution of fractional-order nonlinear Swift-Hohenberg equations using an efficient technique. The presented model is related to the temperature and thermal convection of fluid dynamics which can also be used to explain the formation process in liquid surfaces bounded along a horizontally well-conducting boundary. In this work Laplace Adomian decomposition method is implemented because it require small volume of calculations. Unlike the variational iteration method and Homotopy pertubation method, the suggested technique required no variational parameter and having simple calculation of fractional derivative respectively. Numerical examples verify the validity of the suggested method. It is confirmed that the present method's solutions are in close contact with the solutions of other existing methods. It is also investigated through graphs and tables that the suggested method's solutions are almost identical with different analytical methods.
  • Article
    On fractional order hybrid differential equations
    (Hindawi Publishing Corporation, 2014) Herzallah, Mohamed A. E.; Baleanu, Dumitru
    We develop the theory of fractional hybrid differential equations with linear and nonlinear perturbations involving the Caputo fractional derivative of order 0 << 1. Using some fixed point theorems we prove the existence of mild solutions for two types of hybrid equations. Examples are given to illustrate the obtained results.
  • Article
    On a new class of fractional operators
    (Springeropen, 2017) Jarad, Fahd; Uğurlu, Ekin; Abdeljawad, Thabet; Baleanu, Dumitru
    This manuscript is based on the standard fractional calculus iteration procedure on conformable derivatives. We introduce new fractional integration and differentiation operators. We define spaces and present some theorems related to these operators.