Kurgan State University

Ushbu maqolada suvqalampir (Persicaria minor) barglari va oddiy sachratqi (Cichorium intybus L) poyalaridan turli nisbatlarda tayyorlangan spirtli ekstraktlarning antiradikallik faolligi DPPH usuli yordamida baholandi. Ekstraktlarning erkin radikallarni to‘xtatish qobiliyati DPPH eritmasining yorug‘lik yutilishini pasaytirishi orqali aniqlandi. Natijalarga ko‘ra, barg va poya ekstrakti 1:1 nisbatda eng yuqori faollikni namoyon etdi: ARF 45,80% ni, IC50 esa 30 daqiqadan so‘ng 108,77 mkl ni tashkil etdi. 3:1 va 1:3 nisbatlardagi ekstraktlar ham antioksidant xususiyatga ega bo‘ldi, biroq 1:1 nisbat eng samarali ekanligi aniqlandi. Olingan natijalar suvqalampir ekstraktlarining tabiiy antioksidant sifatidagi salohiyatini tasdiqlaydi.

This article presents a comparative semantic and linguocultural analysis of lexical units representing the concept “woman” in Uzbek and English. The study examines denotative and connotative meanings, socio-cultural motivations, and gender-related semantic shifts reflected in both languages. The findings demonstrate that in Uzbek linguistic consciousness the concept is strongly associated with family roles, moral responsibility, modesty, and honour, whereas in English it reflects individuality, equality, autonomy, and social independence. The research confirms that semantic differences are rooted not only in lexical structures but also in cultural schematization and cognitive framing. The study contributes to gender linguistics, cross-cultural semantics, and linguoculturologyThis article presents a comparative semantic and linguocultural analysis of lexical units representing the concept “woman” in Uzbek and English. The study examines denotative and connotative meanings, socio-cultural motivations, and gender-related semantic shifts reflected in both languages. The findings demonstrate that in Uzbek linguistic consciousness the concept is strongly associated with family roles, moral responsibility, modesty, and honour, whereas in English it reflects individuality, equality, autonomy, and social independence. The research confirms that semantic differences are rooted not only in lexical structures but also in cultural schematization and cognitive framing. The study contributes to gender linguistics, cross-cultural semantics, and linguoculturology.

ABSTRACT Reliability assessment of complex engineering systems is crucial for ensuring safety, performance, and cost‐effectiveness. Traditional reliability models frequently treat failure rates as static and analyze component failure rates in isolation. When dependencies are acknowledged, they are typically considered in a linear manner. This approach, however, fails to adequately capture the dynamic and nonlinear interactions that characterize real‐world systems. This paper proposes a novel reliability modeling framework that integrates dynamic failure rates and nonlinear dependencies to enhance predictive accuracy in reliability analysis. The model considers time‐varying operational and environmental factors that influence failure behavior, along with nonlinear interdependencies among system components, which can amplify risks in unpredictable ways. The proposed framework improves reliability estimation under evolving conditions. To illustrate the implications of the proposed model assumptions, the model is applied on two numerical examples and to demonstrate the impact of the model assumptions, the reliability is compared with the case where these assumptions are not considered. The findings of this research contribute to the advancement of reliability engineering by providing a more comprehensive approach to modeling failures in dynamic, interconnected systems.

The use of artificial intelligence tools in vocabulary learning has gained significant attention recently, with ChatGPT emerging as a potentially game-changing resource for language education. Despite the growing interest, there is limited empirical evidence on the effectiveness of ChatGPT-assisted vocabulary practice in English as a Medium of Instruction (EMI) settings. This study investigates the impact of ChatGPT-assisted vocabulary practice on EMI students' vocabulary development. Over four weeks, a quasi-experimental design compared this new method with traditional vocabulary learning strategies. Sixty EMI students from History, Philosophy, and Pedagogy programs at Fergana State University took part in the research. Pre- and post-vocabulary tests assessed lexical acquisition. Significant improvement is anticipated in the group using ChatGPT-assisted practice compared to the control group. The findings aim to enhance EMI pedagogy and provide insights into effective AI use in academic vocabulary teaching.

This article discusses how music education in preschool educational institutions is considered the main foundation of a child's spiritual and creative development. It develops aesthetic feelings in the child, teaches them to feel beauty, supports mental and emotional development, and develops the child's speech, memory, and attention, revealing their creative abilities.

Mazkur tadqiqotda xelba (Trigonella foenum-graecum) urug‘i ekstraktining yallig‘lanishga qarshi faolligi in vivo sharoitida o‘rganildi. Tajribalar karragenin orqali subplantar yo‘l bilan chaqirilgan o‘tkir ekssudativ yallig‘lanish modeli asosida olib borildi. Tadqiqot 159 ± 17,9 g tana massasiga ega bo‘lgan 8 bosh kalamushlarda amalga oshirildi. Preparat ta’siri 1–5 soatlar va 24 soatda baholandi. “Paxta granulyomasi” modeli orqali antiproliferativ va antiekssudativ faollik aniqlandi. Natijalar xelba ekstrakti ekssudatsiyani va shish darajasini statistik ishonchli kamaytirishini ko‘rsatdi.

The article discusses the use of Voltaire functional series for the analytical synthesis of optimal regulators of systems with nonlinear polynomial dynamics. The relevance of developing control methods for objects with high degrees of nonlinearity, especially in the context of symmetric polynomial systems, is indicated. The paper proposes an approach based on an approximate analytical solution of the equations of free motion using Voltaire functional series, which makes it possible to obtain accurate approximations of solutions and simplify the design of control actions. Models with symmetric and non-symmetric characteristics are considered, as well as the transformation of the initial equations into forms convenient for synthesis. The main task is to develop a method for constructing controls that ensure asymptotic stability and minimize the functionality of generalized work. The work is relevant for the automatic control of complex nonlinear systems, where classical methods are not effective enough.

The paper proposes a method for detecting a situation in which, during facial authentication, one person disguises himself as another by replacing his face with a photograph or a displayed video. The facial feature vector is extracted using a convolutional neural network, classification is implemented using a support vector machine, and the method can be fed with either a single frame or a group of frames as input.

The article analyzes research dedicated to the life and scholarly activity of the prominent source scholar and orientalist, Academician Buriboy Akhmedov, who played a significant role in the development of Temurid studies in the region. The study seeks to identify the main directions and stages of the scholar’s academic work, as well as his place within historiography.