American Journal of Applied Science and Technology https://www.theusajournals.com/index.php/ajast <p><strong>American Journal Of Applied Science And Technology (<span class="ng-scope"><span class="ng-binding ng-scope">2771-2745</span></span>)</strong></p> <p><strong>Open Access International Journal</strong></p> <p><strong>Last Submission:- 25th of Every Month</strong></p> <p><strong>Frequency: 12 Issues per Year (Monthly)</strong></p> <p> </p> en-US info@theusajournals.com (Oscar Publishing Services) info@theusajournals.com (Oscar Publishing Services) Sat, 01 Nov 2025 06:50:32 +0000 OJS 3.3.0.8 http://blogs.law.harvard.edu/tech/rss 60 Beyond Confidentiality: A Dynamic Framework for Systemic Risk Management and Enhanced Resilience in Critical Infrastructure Operations https://www.theusajournals.com/index.php/ajast/article/view/7732 <p>Purpose: Cyber-Physical Systems (CPS) underpinning critical infrastructure face unique security challenges due to the interconnected nature of their computational and physical components. Traditional Information Technology (IT) risk assessment methods prove inadequate, as they fail to quantify the kinetic impact—the physical and safety consequences—of a cyber breach. This study addresses this critical gap by proposing and defining a novel Unified Cyber-Physical Risk Management (UCPRM) Framework.</p> <p>Methodology: The UCPRM Framework is built upon three core principles: holistic IT/OT integration, real-time dynamism, and quantitative consequence mapping. The framework introduces a Cyber-Physical Attack Graph (CPAG) to model complex, cascading failures and a Kinetic Impact Score (KIS) metric to translate cyber likelihoods into measurable physical and financial risk. The methodology integrates established international standards (ISO, NIST) with continuous operational telemetry data for dynamic risk updates.</p> <p>Findings: Application of the UCPRM Framework to a simulated critical infrastructure environment demonstrated that traditional IT-centric risk models significantly underestimate the actual risk profile of CPS by failing to account for the KIS. The framework's real-time risk score enabled predictive alerting and superior resource allocation decisions, aligning security investments with actual physical safety and continuity concerns.</p> <p>Originality: The UCPRM Framework is the first to seamlessly integrate real-time operational data with a structured, quantitative mechanism for assessing the physical consequences of cyber-attacks, offering a necessary paradigm shift for managing the security and resilience of critical CPS.</p> Minh-Hieu Nguye Copyright (c) 2025 Minh-Hieu Nguye https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/7732 Fri, 14 Nov 2025 00:00:00 +0000 The Impact Of Antioxidant Enzymes On Oxidative Stress https://www.theusajournals.com/index.php/ajast/article/view/7901 <p>Oxidative stress represents a critical imbalance between the production of reactive oxygen species (ROS) and the antioxidant defense systems in living organisms. Antioxidant enzymes such as superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GPx) play a vital role in neutralizing oxidative damage. This study explores the biochemical mechanisms, experimental evaluation, and therapeutic implications of antioxidant enzymes in mitigating oxidative stress in human and animal systems. Using spectrophotometric assays, enzyme kinetics, and comparative analysis, the research highlights the potential of natural antioxidants to enhance enzyme efficiency. The results demonstrate a significant correlation between elevated enzyme activity and reduced oxidative biomarkers, suggesting the crucial role of enzymatic regulation in maintaining cellular homeostasis.</p> Halimova Maftuna Obidovna Copyright (c) 2025 Halimova Maftuna Obidovna https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/7901 Mon, 24 Nov 2025 00:00:00 +0000 The Evolution Of Hydraulic Fracturing: A Comprehensive Review Of Techniques, Technological Innovations, And Environmental Consequences https://www.theusajournals.com/index.php/ajast/article/view/7558 <p>Background: Hydraulic fracturing is an indispensable technology for extracting oil and gas from unconventional reservoirs, fundamentally altering the global energy landscape. However, its operational complexity and environmental footprint necessitate continuous innovation. A comprehensive synthesis of traditional techniques, emerging innovations, and associated environmental impacts is required to guide future development.</p> <p>Objective: This article provides a systematic review of hydraulic fracturing, charting its evolution from foundational methods to cutting-edge technologies. It aims to (1) analyze the principles and applications of various fracturing techniques, (2) highlight key technological innovations in fluids and methods, and (3) critically evaluate the environmental impacts and corresponding mitigation strategies.</p> <p>Methods: The analysis is based on a structured review of seminal and contemporary literature. The works are categorized to compare proppant and acid fracturing; assess applications in diverse geologies like shale, high-pressure/high-temperature, and mature fields; and examine novel methods, including supercritical CO2, foam-based, and plasma-based fracturing. The review integrates findings from field case studies and advanced simulation models to connect theory with practice.</p> <p>Results: The review confirms a clear technological progression from water-intensive conventional methods to waterless or reduced-water alternatives designed to enhance efficiency and minimize environmental risks. Innovations like supercritical CO2 and plasma fracturing offer promising solutions for shale reservoirs. Advanced modeling techniques have proven crucial for optimizing fracture network complexity and well performance in challenging environments. While these innovations address key issues like water consumption, significant environmental challenges, particularly concerning water management and induced seismicity, persist.</p> <p>Conclusion: The future of hydraulic fracturing hinges on developing and deploying technologies that are both economically viable and environmentally sustainable. While significant progress has been made, current predictive models for managing environmental risks remain a key area for improvement. Future research must focus on the long-term scalability of novel techniques and the creation of integrated models that fully account for complex geological and environmental interactions.</p> Prof. Helena Santos Copyright (c) 2025 Prof. Helena Santos https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/7558 Sat, 01 Nov 2025 00:00:00 +0000 Method For Assessing The Operating Mode Of Pump Stations In The Karshi Machine Channel Cascade And Calculating Their Hydraulic Parameters https://www.theusajournals.com/index.php/ajast/article/view/7852 <p>First of all, the method for improving the pumping station and the anti-machine channel cascade is based on the design mode of the pumping station and the parameters of the water and channel flow, as well as the development of a hydraulic model. which characterizes the mutual dynamics of the hydraulic parameters of the pump unit and the flow of water and channel, as well as the energy characteristics of the motor pump.</p> Uktam Jovliev, Ergash Kazakov, Muzaffar Ruziev, Rukhshona Ziyadullaeva Copyright (c) 2025 Uktam Jovliev, Ergash Kazakov, Muzaffar Ruziev, Rukhshona Ziyadullaeva https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/7852 Wed, 19 Nov 2025 00:00:00 +0000 Mathematical Induction In Proving Theorems https://www.theusajournals.com/index.php/ajast/article/view/7976 <p>This article presents the proof of a number of theorems using the convenient method of mathematical induction.</p> Mirzakarimova Nigoraxon Mirzaxakimovna, Xolmatov Axrorjon Xakimovich Copyright (c) 2025 Mirzakarimova Nigoraxon Mirzaxakimovna, Xolmatov Axrorjon Xakimovich https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/7976 Fri, 28 Nov 2025 00:00:00 +0000 Mapping The Computational And Memory-Bound Characteristics Of Image Filtering Operations Using The Roofline Model https://www.theusajournals.com/index.php/ajast/article/view/7713 <p>The Roofline model offers a compact way to reason about whether an image-processing kernel is limited by floating-point throughput or by memory bandwidth. This article applies the Roofline framework to canonical filters—generic 3×3 convolution, Sobel edge detection with gradient magnitude, and separable Gaussian blurs (5×5 and 7×7)—to map their computational intensity and predict performance on representative CPU and GPU profiles. We formalize arithmetic intensity under transparent assumptions for single-channel 32-bit images and two-pass separable pipelines, and we derive bandwidth-bound ceilings and compute-bound plateaus for each architecture. Using an illustrative device pair (CPU with 500 GFLOP/s peak and 50 GB/s bandwidth; GPU with 10 TFLOP/s peak and 300 GB/s bandwidth), we show that the studied filters occupy the bandwidth-limited region with intensities between ≈0.38 and ≈1.25 FLOPs/byte, which implies that improving blocking, reuse, and data movement often dominates raw FLOP optimization. A Roofline chart and a comparative table report predicted ceilings in GFLOP/s and converted pixel-throughput ceilings for each kernel. We discuss implications for schedule design, separability, and pipeline organization and argue that Roofline-guided reasoning helps prioritize cache tiling, fusion, and memory-traffic reduction before micro-optimizing scalar FLOPs.</p> Gaybullayeva Mahbuba, Ismailov Shixnazar Copyright (c) 2025 Gaybullayeva Mahbuba, Ismailov Shixnazar https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/7713 Tue, 11 Nov 2025 00:00:00 +0000 Security Challenges In The Era Of Cryptography And Quantum Technologies https://www.theusajournals.com/index.php/ajast/article/view/7888 <p>This article analyzes the profound impact of quantum computing on modern cryptographic systems. It explores the computational complexity theory framework to assess the vulnerability of current cryptographic mechanisms, which rely on complex mathematical problems. The analysis confirms that symmetric cryptography and hash functions remain relatively secure against quantum attacks, primarily threatened by Grover's algorithm. In contrast, widely used public-key cryptosystems are critically vulnerable to Shor's algorithm. The study concludes by examining the transition to post-quantum cryptography, highlighting the challenges of efficiency, trust, and usability that must be overcome before these new algorithms can be widely deployed.</p> Nuriddin Safoev Copyright (c) 2025 Nuriddin Safoev https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/7888 Sun, 23 Nov 2025 00:00:00 +0000 Synthesis Of A Mixed Heteroligand Complex Of Copper Salts With Acetylacetone And Acetamid https://www.theusajournals.com/index.php/ajast/article/view/8002 <p>In recent years, scientists worldwide have been conducting research on the synthesis of heteroligand complex compounds, identifying coordination centers in heteroligand compounds, studying their geometric structure, composition, and properties, elucidating mechanisms of complex formation reactions, investigating complex compounds in solutions, and isolating them in solid form. This article discusses the results of synthesis and analysis of such complex compounds.</p> Sultonova Sitora Faxriddinovna Copyright (c) 2025 Sultonova Sitora Faxriddinovna https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/8002 Fri, 28 Nov 2025 00:00:00 +0000 Study Of Methods For Obtaining Potassium Sulfate https://www.theusajournals.com/index.php/ajast/article/view/7850 <p>This article describes methods for obtaining potassium sulfate. Information on the physicochemical properties of potassium sulfate and some raw materials is also provided. Modern progress in agriculture, along with the introduction of new high-yielding varieties, increased mechanization of field work and irrigation, is largely determined by the degree of its chemicalization and, above all, the use of mineral fertilizers, plant growth and development stimulants, and chemical pesticides.</p> Mirzayev Navruzbek Abdullayevich, Abidova Mamuraxon Alisherovna, Valiyev Barkamoljon Barhayotjon o‘g‘li Copyright (c) 2025 Mirzayev Navruzbek Abdullayevich, Abidova Mamuraxon Alisherovna, Valiyev Barkamoljon Barhayotjon o‘g‘li https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/7850 Wed, 19 Nov 2025 00:00:00 +0000 Dual-Loop P/Pi Control Of A Dc Servodrive: Modeling, Analysis https://www.theusajournals.com/index.php/ajast/article/view/7941 <p>This paper presents a dual-loop P/PI control strategy for a DC servodrive, focusing on the modeling, analysis, and numerical demonstration of system performance. The control structure consists of two cascaded loops: the inner current loop, which ensures fast electromagnetic torque generation, and the outer velocity loop, responsible for dynamic tracking of motor speed. The inner loop is designed using a proportional (P) controller to obtain a fast current response, while the outer loop utilizes a proportional-integral (PI) controller to achieve zero steady-state error in speed control. A mathematical model of the DC motor is developed, including the electrical and mechanical subsystems, and the transfer functions for each control loop are derived. Stability and transient performance of the closed-loop system are evaluated based on classical control theory methods. Finally, a numerical example is provided to demonstrate the tuning approach and illustrate the effectiveness of the dual-loop P/PI control architecture. The results confirm that the cascaded control structure improves dynamic performance and robustness, making it suitable for industrial servodrive applications.</p> Iroda Narimanova, Temurbek Rakhimov, Erkinov Sultonbek, Junjie Yuan Copyright (c) 2025 Iroda Narimanova, Temurbek Rakhimov, Erkinov Sultonbek, Junjie Yuan https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/7941 Wed, 26 Nov 2025 00:00:00 +0000 Green Chemistry Principles In Biopolymer Synthesis https://www.theusajournals.com/index.php/ajast/article/view/7687 <p>The transition to sustainable polymer production is urgent in response to global plastic pollution and fossil resource depletion. Biopolymers — derived from renewable resources or produced biologically — offer promising alternatives to conventional plastics, but their synthesis and processing must adhere to green chemistry principles to realize environmental benefits. This review synthesizes core green chemistry strategies applied in biopolymer synthesis, including renewable feedstocks, benign solvents, enzyme and heterogeneous catalysis, energy-efficient processes, and waste-minimization. Case studies on polylactic acid (PLA), chitosan, and bacterial cellulose illustrate practical implementations and techno-economic considerations. Metrics and life cycle assessment (LCA) approaches used to quantify “greenness” are discussed, as are challenges for scale-up and regulatory acceptance. Recommendations highlight integrated process design, circularity through end-of-life planning, and interdisciplinary research needs to accelerate adoption.</p> <p>The transition to sustainable polymer production is urgent in response to global plastic pollution and fossil resource depletion. Biopolymers — derived from renewable resources or produced biologically — offer promising alternatives to conventional plastics, but their synthesis and processing must adhere to green chemistry principles to realize environmental benefits. This review synthesizes core green chemistry strategies applied in biopolymer synthesis, including renewable feedstocks, benign solvents, enzyme and heterogeneous catalysis, energy-efficient processes, and waste-minimization. Case studies on polylactic acid (PLA), chitosan, and bacterial cellulose illustrate practical implementations and techno-economic considerations. Metrics and life cycle assessment (LCA) approaches used to quantify “greenness” are discussed, as are challenges for scale-up and regulatory acceptance. Recommendations highlight integrated process design, circularity through end-of-life planning, and interdisciplinary research needs to accelerate adoption.</p> Kenjayeva Nargiza Razzaqovna Copyright (c) 2025 Kenjayeva Nargiza Razzaqovna https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/7687 Mon, 10 Nov 2025 00:00:00 +0000 Assessment Of The Potential For Zoning Water-Saving Irrigation Technologies Based On The Aridity Index https://www.theusajournals.com/index.php/ajast/article/view/7880 <p>This article presents the results of assessing aridity indicators by districts of Jizzakh region for the period 2021–2024. Table 1 provides calculations of M.I. Budyko’s radiation aridity index for total and irrigated areas, showing that the values vary within a very narrow range across districts, which indicates a relatively uniform background of natural radiation aridity in the region. Table 2 presents a comparative analysis of an improved aridity index that accounts for irrigation-specific factors and components of the water balance; it is shown that the aridity index for total areas generally ranges from 1.2 to 1.6, while for irrigated areas in some districts it reaches 2.0–3.0. This reflects a deficit of water resources and a high drought potential during the vegetation period, and confirms the urgency of introducing water-saving and innovative irrigation technologies, differentiating crop structure, and implementing adaptive water resources management, especially in the districts of Zomin, Zafarabad, Arnasay and Mirzachul.</p> B.Amanov, D.Gulomov Copyright (c) 2025 B.Amanov, D.Gulomov https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/7880 Fri, 21 Nov 2025 00:00:00 +0000 Methodology For Developing Professional Competence Of Medical Higher Education Students In The Process Of Teaching Biochemistry https://www.theusajournals.com/index.php/ajast/article/view/8000 <p>The article discusses the importance of receiving a quality education from the best universities in the world, not only for our children, but also for adults, and also points out the importance of rankings and education indices for assessing the quality of educational systems in various countries.</p> <p>The main idea of the article is that in the modern world, with the constant development of science, technology and technology, education should change towards the development of practical skills based on theoretical knowledge. It is important to develop students’ competencies and perform tasks based on the knowledge and skills inherent in a particular profession. It is emphasized that modern education should provide preparation for independent decision-making, changes in life and academic activities, as well as contribute to the development of the universality of professional skills and constant changes in society.</p> <p>Particular attention is paid to the formation of competencies as a new modern method of educational development. It is clarified that assessing the ability of students to solve problems based on knowledge and skills, such as self-education, interconnection of knowledge, information search, decision making, teamwork, helps to develop skills and competencies.</p> <p>In conclusion, the article emphasizes the importance of developing and cultivating universal competencies necessary for successful activities in the field of vocational education. The need for continuous updating of teaching methodology is discussed, as well as the presence of two categories of competencies for students: general and special.</p> <p>Thus, the main idea of the article is the need to adapt educational programs to the new requirements of modern society and develop in students the competencies necessary for successful work in the field of their professional activities.</p> Nurutdinova Feruza Muidinovna Copyright (c) 2025 Nurutdinova Feruza Muidinovna https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/8000 Fri, 28 Nov 2025 00:00:00 +0000 Theoretical Basis Of Cascade Dryer Aerodynamics And Evaluation Of Variable Parameters https://www.theusajournals.com/index.php/ajast/article/view/7819 <p>This article discusses the theoretical foundations of the aerodynamics of a cascade dryer used in the industrial drying of wheat grain and the physical and mathematical models of the heat and mass transfer processes occurring in it. The efficiency of the dryer is evaluated depending on the air flow rate, temperature, partial pressure, and moisture properties of the grain being dried. The study analyzed the effects of parameters such as the drying agent motion mode, resistance coefficients in the grain layer, mass transfer coefficient hm, and evaporation coefficient φs. Also, the relationships between the saturation pressure of water vapor on the grain surface psat(Ts), air humidity Yxavo, and air density ρn.u were developed. The results obtained serve to determine the optimal technological modes that allow for energy-efficient drying of wheat while maintaining quality indicators.</p> Azizjon Isomidinov, Abdullokh Abdulazizov, Davronbek Yusupov, Asrorbek Olimjonov Copyright (c) 2025 Azizjon Isomidinov, Abdullokh Abdulazizov, Davronbek Yusupov, Asrorbek Olimjonov https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/7819 Tue, 18 Nov 2025 00:00:00 +0000 Orchestrating Elasticity: A Comparative Analysis Of AI-Driven Predictive Scaling Versus Reactive Auto-Scaling In Microservices Architectures https://www.theusajournals.com/index.php/ajast/article/view/7930 <p>As cloud computing paradigms shift towards microservices and containerized architectures, the efficiency of resource allocation remains a critical challenge. Traditional reactive auto-scaling mechanisms, which rely on threshold-based metrics such as CPU and memory utilization, often fail to address sudden workload spikes, leading to service degradation and "cold start" latency. This study presents a comparative analysis between standard reactive scaling, Ansible-based dynamic scaling on Azure PaaS, and a novel AI-driven predictive scaling framework. Drawing on recent developments in Artificial Intelligence and Infrastructure as Code (IaC), we evaluate these approaches using a synthesized workload representative of complex industrial scenarios, such as refinery turnarounds, and high-velocity e-commerce transactions. Our methodology involves the deployment of a Long Short-Term Memory (LSTM) neural network to forecast workload demands 10 minutes in advance, triggering proactive scaling actions. We contrast this with standard Kubernetes Horizontal Pod Autoscaling (HPA) and rule-based Ansible automation. The results demonstrate that the AI-driven predictive model reduces 95th percentile latency by approximately 34% compared to reactive approaches and mitigates cold-start latency by 90%. Furthermore, while the predictive model incurs a marginal computational overhead, it reduces overall cloud expenditure by 18% by minimizing over-provisioning during idle periods. The findings suggest that integrating AI into the orchestration layer is essential for the next generation of cost-efficient, high-performance cloud architectures.</p> Siddharth V. Menon Copyright (c) 2025 Siddharth V. Menon https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/7930 Thu, 27 Nov 2025 00:00:00 +0000 Comparative Analysis Of Bio-Composites Derived From Animal Chitosan And Fungal Chitosan https://www.theusajournals.com/index.php/ajast/article/view/7649 <p>Chitosan, a biopolymer derived from chitin, is widely recognized for its biodegradability, biocompatibility, and non-toxic characteristics. Animal-derived chitosan, extracted primarily from crustacean shells, has been the conventional source for decades. However, fungal-derived chitosan has recently gained traction as a sustainable and hypoallergenic alternative. This extended article explores structural, physicochemical, and biological differences between animal and fungal chitosan, analyzing their advantages, limitations, and potential applications in medicine, agriculture, food packaging, nanotechnology, and environmental science. The paper further highlights recent research developments (2018–2025), sustainability implications, and future perspectives. Comparative graphs, tables, and literature insights are included to provide a comprehensive understanding of bio-composites based on both sources.</p> Rasulova Yulduz Zikrulloyevna Copyright (c) 2025 Rasulova Yulduz Zikrulloyevna https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/7649 Wed, 05 Nov 2025 00:00:00 +0000 Apoptosis And The Role Of Caspases In The Regulation Of Cellular Stress https://www.theusajournals.com/index.php/ajast/article/view/7865 <p>Apoptosis is programmed cell death triggered by the destruction of the cytoskeleton by proteases and DNA cleavage by endonucleases. This process occurs through various homeostatic and pathological pathways and plays a vital role in maintaining the body's homeostasis, eliminating cells that pose a threat to its survival.</p> <p>Caspases play a key role both in triggering apoptosis (programmed cell death) in the event of irreversible damage and in adaptive cellular responses to moderate stress. More precisely, apoptosis is the controlled elimination of cells deemed unnecessary or potentially dangerous to the body.</p> Sultanova Dildor Bakhshilloevna Copyright (c) 2025 Sultanova Dildor Bakhshilloevna https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/7865 Thu, 20 Nov 2025 00:00:00 +0000 Organic Fundamentals Of Synthesizing Bioplastics From Plant Oils https://www.theusajournals.com/index.php/ajast/article/view/7998 <p>The transition from petrochemical plastics to bio-based alternatives has accelerated interest in plant-oil-derived polymers. Vegetable oils (castor, soybean, linseed, olive, sunflower, and others) provide a versatile platform of triglyceride molecules that can be chemically transformed into a wide range of polymeric architectures including polyesters, polyurethanes, epoxies, and acrylates. This article reviews the organic-chemistry foundations of converting plant oils into bioplastics: functionalization of triglycerides (epoxidation, transesterification, hydrolysis), generation of reactive monomers (fatty acid-based diacids, polyols, cyclic carbonates), polymerization strategies (step-growth polycondensation, ring-opening polymerization, radical curing, non-isocyanate routes), and structure–property relationships. Attention is given to green chemistry principles — atom economy, benign reagents, catalytic and solvent-free methodologies — and to performance factors (crosslink density, crystallinity, thermal stability) that determine suitability for applications. Analytical and characterization techniques (FTIR, NMR, GPC, DSC, TGA, mechanical testing) commonly used to validate molecular structure and properties are summarized. The review concludes with discussion on biodegradability, life-cycle considerations, industrial challenges and perspectives for future research. Keywords and a curated bibliography are provided to meet Scopus submission expectations.</p> Kenjayeva Nargiza Razzaqovna Copyright (c) 2025 Kenjayeva Nargiza Razzaqovna https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/7998 Fri, 28 Nov 2025 00:00:00 +0000 Decay Of Ni Impurity Accumulations In Si Under The Influence Of Thermal Annealing https://www.theusajournals.com/index.php/ajast/article/view/7744 <p>In this article, the effect of thermal annealing on the electrical conductivity of nickel-doped silicon single crystals is investigated. The results of analyses of morphological parameters of impurity accumulations of nickel under the influence of heat treatment, obtained using the method of electron microscopy, are presented. It is revealed that under the influence of thermal annealing at T=1173 K, impurity accumulations of nickel in silicon decay.</p> Turgunov N.A., Sobirova Sh.A. Copyright (c) 2025 Turgunov N.A. https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/7744 Wed, 12 Nov 2025 00:00:00 +0000 Evolving Frameworks for Digital Trust: A Multidimensional Analysis of Data Governance in Cloud, IoT, and Multimodal AI Ecosystems https://www.theusajournals.com/index.php/ajast/article/view/7923 <p><strong>Purpose: </strong>As organizations transition toward cloud-native architectures and artificial intelligence (AI) integration, traditional data governance (DG) frameworks—originally designing for on-premise, structured data—are proving insufficient. This study aims to analyze the evolving requirements of DG in converged environments, specifically examining the intersection of Cloud Computing, Internet of Things (IoT), and Multimodal AI systems. The research seeks to establish a taxonomy of enabling factors that facilitate secure AI adoption and digital trust.</p> <p><strong>Methodology:</strong> A systematic literature review and qualitative document analysis were conducted on 33 peer-reviewed sources ranging from 2014 to 2025. The analysis utilized a risk-based modeling approach to categorize governance dimensions, contrasting cloud versus non-cloud governance taxonomies and evaluating frameworks for algorithmic auditing and multimodal data fusion.</p> <p>&nbsp;<strong>Findings:</strong> The review identifies that successful DG in modern ecosystems requires a shift from static compliance checklists to dynamic, "agile" governance models. Key findings indicate that cloud data governance is distinctively characterized by shared responsibility models that complicate digital forensics and custody. Furthermore, the integration of AI necessitates new governance layers for "grey data" and multimodal inputs, particularly in high-stakes sectors like healthcare and banking. The study confirms that organizational culture and executive sponsorship are as critical as technical controls in enabling secure digital transformation.</p> <p><strong>Originality/value:</strong> This paper proposes a unified conceptual framework that bridges the gap between technical data management and strategic corporate governance. It uniquely addresses the governance of "multimodal" data streams and provides a roadmap for internal auditors to engage with AI systems despite the current lack of standardized guidance.</p> Helvina L. Orvest Copyright (c) 2025 Helvina L. Orvest https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/7923 Wed, 26 Nov 2025 00:00:00 +0000 Molecular Mechanisms Of Catabolism And Their Significance For Cellular Metabolism https://www.theusajournals.com/index.php/ajast/article/view/7646 <p>This study examines the molecular mechanisms of catabolism as the foundation of energy and plastic metabolism in the cell. Particular attention is given to the sequence of biochemical reactions that ensure the breakdown of complex organic compounds into simple metabolites. The oxidative pathways of carbohydrate, lipid, and protein degradation, as well as their interrelations within the overall metabolic system, are analyzed. It is demonstrated that catabolic processes play a crucial role in regulating the cell’s energy balance and maintaining homeostasis. The specific features of enzymatic control and intermolecular interactions determining the efficiency of catabolic reactions have been identified. The obtained results may serve as a theoretical basis for further research in the field of cellular biochemistry and metabolic regulation.</p> Dilnoza Zubayd qizi Ismoilova Copyright (c) 2025 Dilnoza Zubayd qizi Ismoilova https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/7646 Wed, 05 Nov 2025 00:00:00 +0000 Urban Planning Foundations For The Design And Organization Of Recreational And Service Areas Along Intercity Highways https://www.theusajournals.com/index.php/ajast/article/view/7856 <p>This article analyzes the types of roadside rest areas along intercity highway routes, their functional structure, and the characteristics of their spatial placement from a scientific and architectural perspective. The increasing traffic flow on major highways, the growing demand for safe travel conditions for drivers and passengers, and the rising need for service facilities highlight the necessity of modern approaches to the design of rest areas. The article presents a classification of rest areas (minimum, basic, and comprehensive service zones), their service categories, sanitary and hygienic requirements, transport-logistical placement criteria, and environmental approaches. In addition, urban planning parameters and international practices are examined to determine optimal spacing, capacity, and functional organization of such zones. The study concludes with practical recommendations aimed at improving highway transport infrastructure, modernizing roadside service networks, and enhancing the efficiency of interregional transport connections.</p> Ikrom Quzievich Eshatov, Ne'matullayeva Maftuna Oʻlmasbek qizi, Dilnoza Nazar qizi Shaydullayeva Copyright (c) 2025 Ikrom Quzievich Eshatov, Ne'matullayeva Maftuna Oʻlmasbek qizi, Dilnoza Nazar qizi Shaydullayeva https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/7856 Thu, 20 Nov 2025 00:00:00 +0000 Developing Library Services Through Mobile Applications And Chatbots: A Modern Digital Approach https://www.theusajournals.com/index.php/ajast/article/view/7977 <p>The rapid advancement of mobile technologies and artificial intelligence has introduced new opportunities for transforming library services. This study investigates how mobile applications and chatbots can improve access to library resources, enhance user experience, and optimize internal workflows. Using a mixed-method design combining a literature review, user surveys, and prototype testing, the research explores the practical impact of these technologies in academic libraries. Findings indicate that mobile and chatbot-based services significantly reduce information-search time, increase satisfaction, and decrease the repetitive workload of librarians. The paper concludes with recommendations for implementing smart, user-centered digital systems in higher education libraries.</p> Sunnatillo Nuralievich Ernakulov Copyright (c) 2025 Sunnatillo Nuralievich Ernakulov https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/7977 Fri, 28 Nov 2025 00:00:00 +0000 The Impact Of A Combination Of Healthy Eating And Physical Activity On Student Health https://www.theusajournals.com/index.php/ajast/article/view/7730 <p>This research article explores the significance of healthy nutrition and physical activity in maintaining and improving the health of university students. The study analyzed students’ dietary habits, their participation in sports activities, and the effects on the body’s functional indicators. The findings indicate that the combination of regular physical exercise and balanced nutrition helps regulate metabolic processes, prevent excess weight gain, and improve mental and emotional well-being. Practical recommendations for promoting a healthy lifestyle among students are also provided.</p> Ibragimov Azizbek Ilhom o’g’li Copyright (c) 2025 Ibragimov Azizbek Ilhom o’g’li https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/7730 Wed, 12 Nov 2025 00:00:00 +0000 Scientific And Methodological Foundations For Developing Practical Fire Safety Skills In Students https://www.theusajournals.com/index.php/ajast/article/view/7900 <p>The development of civil society, the introduction of automated systems, the construction of advanced mechanisms and multi-storey buildings and structures, as well as other factors, necessitate aligning the professional and physical preparedness of rescuers with modern requirements.</p> Xadicha Xuramova Mamadovna Copyright (c) 2025 Xadicha Xuramova Mamadovna https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/7900 Mon, 24 Nov 2025 00:00:00 +0000 Operationalizing Trust: A Multi-Layered Framework for Ethical Governance and Explainability in High-Stakes Artificial Intelligence Systems https://www.theusajournals.com/index.php/ajast/article/view/8031 <p>Background: As Artificial Intelligence (AI) systems become integral to high-stakes decision-making in healthcare, finance, and education, the opacity of "black box" models presents significant ethical and legal challenges. While deep learning models offer superior predictive accuracy, their lack of interpretability undermines user trust and complicates compliance with emerging privacy regulations.</p> <p>Methods: This study employs a comprehensive theoretical analysis, synthesizing literature on Cyber Security, AI Governance, and Explainable AI (XAI). We utilize a systems-design perspective to construct a multi-layered framework that aligns algorithmic transparency with ethical privacy requirements. The research evaluates various XAI approaches—including prototype-based reasoning and counterfactual explanations—against metrics of fairness, privacy preservation, and explanation quality.</p> <p>Results: Our analysis identifies a critical "Transparency-Privacy Paradox," where granular explanations may inadvertently leak sensitive training data. Furthermore, we find that post-hoc explanation methods often suffer from "deceptive transparency," providing plausible but unfaithful justifications for model behavior. Conversely, interpretable-by-design architectures demonstrate a higher capacity for building sustainable trust without compromising privacy standards.</p> <p>Conclusion: We conclude that trust in AI cannot be achieved through performance metrics alone. Instead, it requires a holistic governance strategy that integrates "Privacy by Design" with robust XAI mechanisms. We propose a shift from retrospective explanation to prospective, interpretable model architecture as the standard for critical infrastructure.</p> Dr. Aris Thorne , Dr. Elena V. Rostova Copyright (c) 2025 Dr. Aris Thorne , Dr. Elena V. Rostova https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/8031 Sun, 30 Nov 2025 00:00:00 +0000 The Presence Form Iridium In Waste Gases Of Copper Production https://www.theusajournals.com/index.php/ajast/article/view/7851 <p>The modern development of metallurgy requires comprehensive processing of raw materials with the extraction of valuable components from technogenic waste. Despite the presence of significant quantities of valuable components in technogenic waste, a significant aspect is the form of occurrence and properties of the extracted component, as their physicochemical properties during interaction with process reagents lead to unpredictable interactions. To select an effective technology and assess the quality of the resulting product, it is necessary to investigate and analyze the chemical and mineralogical formations of compounds in the raw materials. Consequently, iridium is present in the exhaust gases of the copper smelting section. Iridium belongs to the rarest and most refractory elements of the platinum group. Despite its extremely low content in nature, it can be present in the waste flows of non-ferrous metallurgy, especially during the processing of copper-nickel and copper-molybdenum sulfide ores containing platinum metal impurities. The capture and extraction of iridium from exhaust gases is becoming both ecologically relevant and resource-saving. This article is dedicated to the analysis of the forms of iridium's presence in gases, the thermodynamic aspects of its behavior in various types of furnaces, and the technical possibilities of its capture and extraction.</p> Abdurahmanov S.A., Samadov A.U., Askarova N.M. Copyright (c) 2025 Abdurahmanov S.A., Samadov A.U., Askarova N.M. https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/7851 Wed, 19 Nov 2025 00:00:00 +0000 AI-Augmented Devsecops Security: Integrating Neural Vulnerability Detection, Adaptive Learning, And Policy-Driven Automation Across Modern CI/CD Pipelines https://www.theusajournals.com/index.php/ajast/article/view/7966 <p>This research article presents a deeply elaborated and theoretically grounded examination of AI-augmented DevSecOps security, synthesizing findings from neural code-scanning innovations, adaptive learning systems, policy-driven architectures, cloud-native security automation, and AIOps-enabled operational intelligence. Drawing exclusively from the provided references, the study develops an expanded conceptual model illustrating how deep learning, adaptive threat modeling, automated security governance, and continuous vulnerability detection converge to create a mature, self-evolving DevSecOps ecosystem. The article emphasizes the increasing sophistication of neural code-scanning models capable of identifying complex and previously unseen vulnerabilities, along with adaptive learning mechanisms designed to cope with evolving attack surfaces in cloud-native architectures. In addition, policy-driven DevSecOps frameworks are explored as a means of enforcing compliance, providing architectural guardrails, and guaranteeing uniform security enforcement across distributed microservices. Further analysis highlights the relevance of AI safety principles, the operational challenges inherent in large-scale automation, and the implications of continuous security testing for real-world CI/CD environments. This research integrates theoretical reasoning with practical insights arising from case studies on pipeline vulnerabilities, dynamic security testing obstacles, anomaly detection within cloud-native microservice ecosystems, and the emerging importance of AIOps in enabling self-healing pipeline infrastructures. Collectively, the findings offer a detailed conceptual foundation intended to support researchers, security engineers, and DevSecOps practitioners seeking to design robust, AI-enabled security architectures capable of sustained resilience.</p> Dr. Chen P. Wei Copyright (c) 2025 Dr. Chen P. Wei https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/7966 Fri, 28 Nov 2025 00:00:00 +0000 Optimization Of Power Supply Systems For Mobile Network Base Stations https://www.theusajournals.com/index.php/ajast/article/view/7699 <p>The modern era of telecommunications is characterized by an insatiable demand for connectivity, which has created a pressing need to optimize the energy efficiency of base station subsystems. The base station subsystem serves as the backbone of mobile communication networks and is a significant consumer of power. This article explores contemporary trends in the realm of telecommunications infrastructure to promote a more sustainable and eco-friendly future.</p> Juraev Nurmakhamad Mamatovich Copyright (c) 2025 Juraev Nurmakhamad Mamatovich https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/7699 Tue, 11 Nov 2025 00:00:00 +0000 Mplementation Of The Process Of High Temperature Diffusion Treatment https://www.theusajournals.com/index.php/ajast/article/view/7881 <p>The test specimens and finished products were subjected to high-temperature diffusion treatment in low-melting metal melts. The final mechanically processed products, which reached a roughness of Rz40-Ra2.5, were degreased with alcohol and acetone before loading into the furnace. The working ampoules were made of grade 10 carbon steel and were solid metal, with an outer diameter of up to 85 mm, a height of up to 180 mm, and a wall thickness of up to 8 mm, allowing for maximum utilization of the working space of the SShV-1.2.5/25-I1 vacuum furnace. When studying the kinetics of the effect of melt composition on the HTAD process, smaller ampoule specimens with an outer diameter of 20 mm, a height of 35 mm, and a wall thickness of 3 mm were used.</p> Ismatov Jumaniez Faizullaevich, Mizrabov Ulugbek Bolikulivich Copyright (c) 2025 Ismatov Jumaniez Faizullaevich, Mizrabov Ulugbek Bolikulivich https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/7881 Fri, 21 Nov 2025 00:00:00 +0000 Innovative Approaches To Assessing Medical Students’ Knowledge And Professional Competence In A Competency-Based Educational Model https://www.theusajournals.com/index.php/ajast/article/view/8001 <p>The article analyzes the results of applying the competency-based approach in the higher education system. The role of biochemistry as a fundamental academic discipline in the formation of basic and professional competencies of future medical workers is considered. Examples are given that the main integral tool for monitoring the results of students' educational and cognitive activities is the rating assessment system.</p> Nurutdinova Feruza Muidinovna Copyright (c) 2025 Nurutdinova Feruza Muidinovna https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/8001 Fri, 28 Nov 2025 00:00:00 +0000 Defects Arising In The Process Of Sewing Outerwear https://www.theusajournals.com/index.php/ajast/article/view/7844 <p>This article examines defects that arise during the outerwear sewing process. Defects in the sewing seam at garment manufacturing facilities were also examined during the outerwear sewing process. The study identified instances of needle friction and thread burning of clothing materials. The study found that many thread breaks are caused by damage to the warp and weft threads of the clothing material.</p> <p>&nbsp;</p> Saidova Хulkar Хamidovna, Djalolova Dilafruz Fattoxovna Copyright (c) 2025 Saidova Хulkar Хamidovna, Djalolova Dilafruz Fattoxovna https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/7844 Wed, 19 Nov 2025 00:00:00 +0000 Integration Of Artificial Intelligence In Environmental Protection Technologies https://www.theusajournals.com/index.php/ajast/article/view/7940 <p>This research explores the integration of artificial intelligence (AI) into modern environmental protection technologies. It highlights how AI-driven systems—such as machine learning, computer vision, and data analytics—enhance environmental monitoring, pollution control, waste management, and climate modeling. The paper discusses applications of AI in predicting natural disasters, optimizing energy use, and supporting sustainable resource management. Furthermore, ethical challenges, data reliability, and policy implications are examined to ensure responsible and effective deployment of AI technologies in environmental protection. The study concludes that AI has transformative potential to accelerate global sustainability efforts and improve decision-making for environmental governance.</p> Jumaqulova Zulayho Bahodirjon kizi Copyright (c) 2025 Jumaqulova Zulayho Bahodirjon kizi https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/7940 Wed, 26 Nov 2025 00:00:00 +0000 An Algorithm For Selecting Informative Symbols Based On Determining The Measure Of Information In A Nominally Informed Space https://www.theusajournals.com/index.php/ajast/article/view/7681 <p>The article reveals the issue of reducing the size of the phase of features describing objects, from data mining to brain cancer diseases. Initially, with the support of specialists in the field of medicine, 218 objects of the 4th class were conducted (it is a paid astrocytoma of the right hemisphere of the brain; Adenoma of the cellar region of the brain; Glioblastoma of the right-sided region of the brain; Meningioma of the right frontal region of the brain) and a training sample of 19 characters is formed.&nbsp; In this educational selection, the features characterizing the objects of the class are expressed as a nominal value. For this reason, this article proposes an algorithm for solving the problem of choosing a set of informative symbols based on determining the measurement of information in a nominal data space.</p> Juraev Gulomjon Primovich, Saparov Saidqul Khojamurotovich Copyright (c) 2025 Juraev Gulomjon Primovich, Saparov Saidqul Khojamurotovich https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/7681 Sun, 09 Nov 2025 00:00:00 +0000 Studying The Importance Of Processes Performing A Useful Function Due To Movement-Based Vibratory Movement https://www.theusajournals.com/index.php/ajast/article/view/7878 <p>This article studies the physical and mathematical models of technological processes based on induced vibrational motions and their significance in industrial sectors. The influence of vibrational (vibrational) action on mass transfer, energy distribution and structure stabilization in liquid, solid and mixed media is analyzed. Also, the energy-saving and eco-technological advantages of using vibrating systems in chemical and building materials production processes are shown.</p> B.J. Khursanov Copyright (c) 2025 B.J. Khursanov https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/7878 Fri, 21 Nov 2025 00:00:00 +0000 Teaching Complex Biochemical Reactions Through Simplified Algorithms https://www.theusajournals.com/index.php/ajast/article/view/7999 <p>This article discusses the effectiveness of teaching complex metabolic processes and multi-step reactions in biochemistry using simplified algorithms. Since topics explained through complex schemes in traditional methods often cause difficulties for students, it is emphasized that the algorithmic approach helps to master the processes step by step, in a logical sequence. During the research, it was observed that when algorithmic blocks, the “if-then” principle, and visual flowcharts were used, the level of students' understanding of the topic, the effectiveness of memorizing the sequence of processes, and systematic thinking skills significantly increased. It was also noted that interactive tasks made the lesson more interesting and increased student activity. The results obtained allow us to recommend the algorithmic approach as an innovative and effective pedagogical method in teaching biochemical processes.</p> Saidov Olimjon Amon o’g’li Copyright (c) 2025 Saidov Olimjon Amon o’g’li https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/7999 Fri, 28 Nov 2025 00:00:00 +0000 The Production Of Organic Reagents From Renewable Raw Materials https://www.theusajournals.com/index.php/ajast/article/view/7759 <p>This comprehensive article deeply analyzes the production of organic reagents from renewable raw materials, focusing on technological, environmental, and economic aspects. It emphasizes the significance of renewable feedstocks such as lignocellulosic biomass, plant oils, and algae as sustainable alternatives to fossil-based sources. Moreover, it examines recent innovations, industrial applications, and future directions in green chemistry.</p> Alauatdinova Aynagul Inyatdinovna, Nietova Aliya Polatovna, Erimbatova Dilnoza Nurulla qizi Copyright (c) 2025 Alauatdinova Aynagul Inyatdinovna, Nietova Aliya Polatovna, Erimbatova Dilnoza Nurulla qizi https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/7759 Thu, 13 Nov 2025 00:00:00 +0000 Integrated Framework For Robust, Responsible, And Evaluative Deployment Of Large Language Models: A Comprehensive Methodological And Theoretical Treatise https://www.theusajournals.com/index.php/ajast/article/view/7925 <p>Background: The rapid evolution of large language models (LLMs) has outpaced standardized frameworks for their evaluation, deployment, and governance. Diverse evaluation protocols, emergent alignment techniques, and domain adaptation strategies have been proposed, yet a unified, theoretically grounded, and practically applicable framework that connects evaluation, fine-tuning, bias assessment, and end-to-end testing remains underdeveloped.</p> <p>Objective: This article proposes and elaborates an integrated framework that synthesizes state-of-the-art evaluation methodologies, bias and truthfulness assessments, domain-specific fine-tuning practices, and automation frameworks for end-to-end testing, grounded in existing literature and empirical benchmarks. Methods: Drawing strictly on the provided literature, we construct a conceptual pipeline where standardized evaluation metrics (including human-aligned LLM-based evaluators), bias and safety assays, and domain adaptation workflows interlock to produce responsible deployment. We analytically extend evaluation taxonomies, compare model families (closed versus open foundation models), and propose best-practice procedural guidelines for automated testing.</p> <p>Results: The framework clarifies relationships among intrinsic metrics (e.g., perplexity and proxy linguistic measures), extrinsic metrics (task performance), human-aligned automated evaluation (G-Eval and OmniEvalKit principles), and qualitative safety/bias tests (StereoSet, CrowS-Pairs, TruthfulQA). We articulate methodological choices for domain fine-tuning and provide an automation blueprint for continuous validation and regression testing in production settings.</p> <p>Conclusions: The proposed integrated framework operationalizes evaluation and governance for LLMs, balancing performance optimization with societal risk mitigation. Adoption of this framework can reduce deployment failures, improve alignment with human judgments, and create a replicable pipeline for domain-specialized LLMs. Limitations include dependence on evolving evaluation tools and the need for empirical calibration in diverse application domains. The article closes with prioritized avenues for future research, including benchmark harmonization and adaptive testing regimes.</p> Dr. Arjun Sen Copyright (c) 2025 Dr. Arjun Sen https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/7925 Thu, 27 Nov 2025 00:00:00 +0000 Cyano-Acylation And Cyano-Esterification Of Unsaturated Hydrocarbons https://www.theusajournals.com/index.php/ajast/article/view/7648 <p>This review aims to summarize the current literature on the direct vicinal cyano-acylation and cyano-esterification of unsaturated hydrocarbons, with a particular focus on the mechanistic features of these reactions. This review is structured into four main sections. The first section covers the cyano-acylation of alkenes, followed by a discussion of cyano-esterification of alkenes in the second section. The third section consists of an overview of cyano-acylation of alkynes, while the final section focuses on the cyano-esterification of alkynes.</p> Oblokulov Shavkat Shayimovich Copyright (c) 2025 Oblokulov Shavkat Shayimovich https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/7648 Wed, 05 Nov 2025 00:00:00 +0000 Opportunities For Organizing Counterflow (Reversion) Traffic For Motor Vehicles https://www.theusajournals.com/index.php/ajast/article/view/7857 <p>Managing traffic flows in modern urban infrastructure shapes the efficiency of the transport system. In recent years, the rapid growth of vehicles in major cities of Uzbekistan, especially in Samarkand, has strained existing road networks and increased congestion. Along with building new roads, the introduction of intelligent control systems and reversible traffic methods has become an urgent priority.</p> Davlatov Ikrom Shavxidinovich, Xujakeldiyev Parviz Erkin o’g’li Copyright (c) 2025 Davlatov Ikrom Shavxidinovich, Xujakeldiyev Parviz Erkin o’g’li https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/7857 Thu, 20 Nov 2025 00:00:00 +0000 Dermatological Patterns In Patients During The Post-Covid Period https://www.theusajournals.com/index.php/ajast/article/view/7978 <p>At the beginning of the pandemic, dermatological changes were rarely documented, possibly due to the lack of conditions for conducting a full skin examination; subsequent studies showed a significantly greater number of cases of skin lesions and the emergence of dermatological manifestations. The true cause of dermatological changes after a previous coronavirus infection, the uncertainty as to whether they appear in connection with the direct effect of the infection or are associated with systemic diseases (for example, reactive or drug-induced), and how best to manage them, are pressing issues that complicate the understanding of these dermatological conditions.</p> R.A. Oripov, G.K. Ismailova, Z.M. Abdiyev Copyright (c) 2025 R.A. Oripov, G.K. Ismailova, Z.M. Abdiyev https://creativecommons.org/licenses/by/4.0 https://www.theusajournals.com/index.php/ajast/article/view/7978 Fri, 28 Nov 2025 00:00:00 +0000