All Articles

Summary: A mathematical model of a queuing-inventory system (QIS) with catastrophes is built. Incoming customers form a Poisson flow with rate λ. The customer servicing time in the considered QIS is zero. The (S,Q) replenishment policy is used to increase the inventory level in the system. Here, S is the maximum storage size of the QIS, and Q=S-s indicates the fixed size of the proposed order.

Summary: Pneumonia is a prevalent illness that has a global impact, primarily affecting children and older individuals. Timely identification is essential for immediate intervention, particularly in regions with restricted healthcare availability. The purpose of this paper is to compare how well two methods work for finding pneumonia on chest X-rays creating a custom Convolutional Neural Network (CNN) and using a model that has been pre-trained, such as ResNet-50. The results indicated that although the customized CNN had difficulties achieving satisfactory performance, the ResNet-50 model demonstrated encouraging outcomes following the process of fine-tuning. This paper seeks to improve the detection of pneumonia, especially in disadvantaged places with limited medical resources, by utilizing modern technologies such as deep learning and pre-trained models. Considering the results gained to enhance patient outcomes and decrease mortality rates associated with pneumonia by enabling more precise and prompt detection, this has a beneficial effect on global public health

Summary: This work is dedicated to the impulsive Sturm - Liouville operator on the whole axis with complex almost periodic potentials and the discontinuous coefficient on the right – hand side. We investigated the main characteristics of the fundamental solutions of the Sturm – Liouville equation. From the impulsive condition we found the transfer matrix. Using the impulsive condition and transfer matrix, we constructed Green’s function and obtained the resolvent of the impulsive Sturm – Liouville operator. In future works, eigenvalues of the impulsive Sturm - Liouville operator will be investigated. The inverse problem will be formulated, a constructive procedure for the solution of the inverse problem will be provided.

Summary: Artificial intelligence driven drone systems offer promising solutions for early detection and response to environmental hazards like wildfires and oil leaks. However, their widespread adoption raises significant ethical and environmental implications, including privacy infringements, algorithmic bias, data security, noise pollution, and greenhouse gas emissions. This study addresses these issues through literature reviews, surveys of affected populations, and prototype testing of AI models for disaster identification, in order to mitigate ethical issues. A specific metric was developed to rate drone components and identify the most sustainable options, minimizing the environmental impact. By promoting these solutions, this research aims to ensure the sustainable and responsible integration of artificial intelligence systems in environmental monitoring, protecting ecosystems and communities effectively.

Summary: The paper considers a boundary value problem generated by a differential diffusion equation and nonseparated boundary conditions. One of the boundary conditions contains a quadratic function of the spectral parameter. The multiplicity of eigenvalues of the boundary value problem under consideration is investigated. A criterion for the multiplicity of eigenvalues and zeros of the characteristic function of a boundary value problem is obtained.The found necessary and sufficient conditions are expressed through the values of the fundamental solutions of the diffusion equation and the coefficients of the boundary conditions. Note that the results obtained can be used in the study of direct and inverse problems of spectral analysis for various differential operators. These results also play an important role in studying the structure of the spectrum, in establishing the order of arrangement of eigenvalues of boundary value problems, and in finding sufficient conditions for the reconstruction of the corresponding problems.

Summary: In this article, the issue of controlling the movement of a hexacopter-type unman-ned aerial vehicle (UAV) along a route is investigated. The movement of the hexacopter is modeled as the movement of a rigid body, and in this process, the forces of gravity and aerodynamic resistance are taken into account. The spatial orientation of the hexacopter is expressed using quaternions. The movement route is considered as a broken line consisting of straight segments, and the parameters controlling its flight are determined when one of the hexacopter's motors is not working. Mathematical justification is provided for how the operational motors are controlled to continue the hexacopter's movement in its previous manner when one motor fails.

Summary: The paper examines different types of hypersingular integrals with the Cauchy kernel on a segment and a unit circle and defines them using specific methods. It presents more general definitions for one-dimensional hypersingular integrals with the Cauchy kernel based on Hadamard's integral in the sense of a finite part. The paper also establishes the existence theorems of these hypersingular integrals and formulas, which demonstrates the accuracy of the resulting integrals that are applied in various applications and engineering problem-solving. The proposed formulas are straightforward to calculate, making the new approximate method reliable and easy to apply and the obtained numerical results demonstrate the stability and efficiency of the approach.

Summary: Nearly every organization would like to adapt their environment to the cloud to increase productivity and decrease operational costs. By moving to the cloud, organizations are still struggling with enterprise mobile management systems. Managing devices can be challenging because of the complexity of the Microsoft ecosystem. However, Microsoft Intune is a service which was created to solve issues with managing devices and increase device security. This product can help to reduce potential security incidents within the organization and even during collaboration with other organizations. The research employs a methodical approach where organizations utilize Microsoft Intune with its full capabilities and all available security configurations. This paper will examine Microsoft Intune's effectiveness in the matter of device management and security with different aspects.

Summary: Leaders can make significant contributions to the functioning of the firm, regardless of their time and position. Leadership with effective strategies can provide a fundamental foundation for the effective use of the strategic management process. Leaders who follow strategies can accelerate the growth of relevant strategic activities and determine how to implement them. These activities serve as a gateway to higher average results and strategic competitiveness. Managers working in various organizations are fully aware of the need to create a strategic plan for the future of their organizations and participate in the effective adoption of these well-planned plans. In strategic management, the leader assumes various roles. He/she creates the conditions for change. Secondly, he/she selects key players from the organization and in the third stage, he/she creates a leadership team by shaping the vision and strategy through a visionary process that breaks down the existing hierarchy and clarifies the strategy that the entire organization can understand. Taking into consideration above mentioned facts, the article focuses on theoretical background of the topic. Scientific literature has been used in order to shred light into the topic.

Summary: Entrepreneurship is critically importance for individuals' economic and social development. The concepts of entrepreneurial resilience, entrepre-neurial intentions and entrepreneurial self-efficacy have become important research topics in the field of entrepreneurship and the number of studies carried out on these topics is increasing. Entrepreneurial resilience describes the resistance and adaptability of entrepreneurs in overcoming challenges, while entrepreneurial intentions represent individuals' attitudes and motivations towards entrepreneurial activities. Entrepreneurial self-efficacy is based on individuals' entrepreneurial abilities and their confidence in using these abilities. The aim of this study is to comprehensively examine the bibliometric analysis of academic studies on entrepreneurial resilience, entrepreneurial intentions and entrepreneurial self-efficacy. This type of analysis is essential for understanding the current knowledge in the field of entrepreneurship, evaluating the effects on entrepreneurial processes and determining future research directions. For this purpose, data was obtained using the Web of Science database and analyzed using the R program using the bibliometric method. Within the scope of the findings, 2525 studies are examined in detail and it is aimed to provide important information for researchers who want to work in this field and to contribute to the literature.