Digital Commons Network^™

Movable Bed Physical Model Investigation Of Bed Level Changes Caused By River Sediment Diversions, Hayden Cole Franklin

LSU Master's Theses

Since 1932, due to human and natural processes, over 2,000 square miles of Louisiana’s coast have been lost. River sediment diversions have been proposed as sustainable options to combat land loss. These projects, like the proposed Mid-Barataria Sediment Diversion, are designed to deliver sediment-rich Mississippi River water into nearby bays and estuaries, helping build and maintain land. However, river sediment diversions may alter river hydraulics and sediment transport, potentially inducing upstream degradation and downstream aggradation. Using the Lower Mississippi River Physical Model (LMRPM), this study quantitatively analyzed bed level changes as well as hydraulic conditions associated with the proposed Mid-Barataria …

Analysis Of Soda Production Processes In Ammonia-Soda Production, Nadirbek Rustambekovich Yusupbekov Professor, Djalolitdin Paxritdinovich Mukhitdinov Professor, Fatima Faxritdinovna Iskhakova

Technical science and innovation

This paper provides a comprehensive analysis of the fundamental principles of the classical Solvay process, a key component in the industrial production of soda ash. It is noted that despite its widespread use and technological maturity, the process has a number of significant technological, energy, and environmental limitations associated with high raw material and energy consumption, the generation of significant industrial waste, and CO₂ emissions. The need to modernize the traditional production process to improve efficiency, resource conservation, and environmental sustainability is substantiated. The review systematically summarizes current approaches to process improvement, including modified versions of the Solvay process, the …

Analysis And Study Of Telemetry Systems For Directional And Horizontal Well Drilling, Jahongir Abdiganiyev Erkin Ugli, Sherali Halloqovich Umedov

Technical science and innovation

The article discusses the issues of reducing non-productive drilling time during the construction of directional and horizontal wells. The main focus is on the analysis of drilling conditions in complex geological and high-temperature environments. Particular attention is paid to drilling conditions in the territory of the Republic of Uzbekistan, with a specific study of data from the Boysun and Ustyurt regions. An analysis and study of the performance of telemetry systems available on the market, as well as their main technical characteristics, have been conducted. Key factors affecting the accuracy of wellbore trajectory measurements under various geological and technical conditions …

Mathematical Modelling And Optimisation Of The Reactor For The Esterification Process Of Safflower Oil With N-Butyl Alcohol, Sadritdin Makhamatdinovich Turabdjanov Academician, Hasan Sadriddin Ugli Fozilov, Ozoda Bakhronovna Axmedova, Sadriddin Fayzullayevich Fozilov

Technical science and innovation

This study addresses the mathematical modelling and optimisation of a reactor for the esterification of safflower oil with n-butyl alcohol. To improve process controllability and reduce the need for numerous pilot-scale trials, an ideal-mixing continuous stirred-tank reactor (CSTR) model was adopted. Incorporating reaction kinetics, the effect of contact time on the relative viscosity of the product mixture was analysed. The modelling results indicate that achieving an acceptable degree of feedstock conversion is difficult when a single ideal-mixing reactor is used. Therefore, a CSTR cascade was proposed, and the configuration with N = 2 reactors was selected as the most appropriate …

Adaptive Multi-Stage Fuzzy Logic Approach With Dynamic Weight Adjustment For Robust Power Transformer Diagnostics, Dilafruz Rustamovna Abdullabekova, Odiljon Muhammadjonovich Kutbidinov

Technical science and innovation

An adaptive multi-level fuzzy logic framework with dynamic weight adjustment for power transformer fault diagnosis and health index assessment was proposed in this study. A comprehensive analysis of existing transformer diagnostic approaches was performed, and their limitations related to static weighting schemes and uncertainty handling were identified. A hierarchical fuzzy inference structure was introduced, integrating multi-source diagnostic data, including dissolved gas analysis, transformer oil quality indicators, thermal parameters, and electrical measurements. At the first level, individual fuzzy subsystems were developed to evaluate partial condition indices associated with insulation degradation, oil aging, and thermal–electrical stress. At the second level, a global …

Manufacturing Of Functional Surface Coatings In The Automotive Industry, Gulirano Saidakhmedova

Technical science and innovation

The development of environmentally sustainable technologies for material processing represents one of the most pressing scientific and technical challenges in modern industrial production. This issue is particularly relevant to the automotive industry, where growing demands for energy efficiency, durability, and environmental safety necessitate the adoption of advanced manufacturing methods. Special attention is given to developing vacuum-based, import-substituting equipment and technologies for producing functional coatings from composite materials with predefined physical, mechanical, and optical properties, including reflective and protective characteristics. Current requirements for mechanical engineering products and production technologies drive the need for innovative approaches to material processing and specialized technical …

Disproportionate Influence: Rethinking Control In American Corporate Governance, Dhruv Aggarwal, Ofer Eldar

Northwestern University Law Review

Corporate law has undergone a gradual transformation. Founding chief executive officers (“founder-CEOs”) and activist hedge funds increasingly dominate leading American corporations despite owning well short of a majority of shares. Founder-CEOs, through personal brands or dual-class voting structures, control firms despite having minority stakes; activist hedge funds, with single-digit holdings, press for major governance changes. We argue that these two types of shareholders, often treated as opposites, both dominate corporations through disproportionate influence rather than majority ownership. We describe these investors who dictate corporate policy through disproportionate influence as high-influence shareholders.

Delaware’s doctrinal response to high-influence shareholders has been inconsistent, …

Studying The Performance Of Photovoltaic Installations In The Pvsyst Software Package, Zukha Islamovna Juraeva, Isroil Abriyevich Yuldoshev I.A.Y., Islom Rakhmatovich Juraev

Technical science and innovation

This article simulates the operation of photovoltaic installations consisting of photovoltaic panels of crystalline and thin-film technologies. The calculations were performed in the PVSyst software package 7.4.8 version. In the calculations, the input parameters were environmental factors, the angle of inclination of the panels to the horizon. In calculating the values of the solar radiation flux density, the program selects the METEONORM climate database in accordance with the geographical area of the Tashkent city. The tilt angles of the photovoltaic panels of the installation were set manually by selecting specific values of the characteristic tilt angles in the range from …

Modern Promising Directions For The Development Of Alternating Current Converters, Shukhrat Badretdinovich Umarov, Ubaydullo Abdushukur Ugli Boqijonov

Technical science and innovation

The relevance of this work is explained by the presentation of modern trends in the development of powerful AC converters, which are widely used in various industrial processes, agriculture, and other sectors. Today, the most widely used method for creating powerful AC converters is the use of double energy conversion systems (DECS). The article shows the electrical diagram and functional tasks of the DECS system, as well as the technical and schematic capabilities of the pulse width modulation (PWM) inverter.  It highlights the importance of effectively using independent (autonomous) filters to improve the hybrid and matrix structure, as well as …

Analysis Of Automatic Regulation Based On The Dynamic Indicators Of The Working Body For Cleaning Channels And Ditches, Nasiba Siraj Amirbayova

Technical science and innovation

Today, the comprehensive development of road infrastructure and agriculture directly requires the reconstruction and effective use of systems intended for irrigation and protection of road surfaces. The goal of agricultural development has made it necessary to increase attention to this area. This also reveals the correct use and operation of existing melioration irrigation systems as an important problem. This is mainly one of the issues of correct operation of road infrastructure. It is known that the majority of agricultural products are produced in areas where irrigation systems are widely developed. On the other hand, the use of collector-drainage networks, cleaning …

Refinement Of Wind Speed Estimation At Turbine Hub Height Using Satellite Data And Regression Analysis Under Complex Terrain Conditions, Isroil Abriyevich Yuldoshev, Tulqin Rustamovich Jamolov, Sa'dullo Sayfiddin Ugli Fazliddinov, Jumanazar Farhodjon OʻGʻL Abdurashidov

Technical science and innovation

Reliable assessment of wind energy potential in regions characterized by complex terrain is often constrained by the limited availability of ground-based meteorological measurements. This study proposes an improved regression-based approach for refining wind speed estimates at the wind turbine hub height of 65 m using satellite-derived data from the NASA POWER database combined with a logarithmic vertical wind profile. The proposed methodology is validated using real operational data from a 750 kW wind power plant located in the mountainous Bostanlyk district of Uzbekistan for the period 2018–2021. The regression analysis demonstrates a strong linear relationship between the extrapolated wind speed …

Design Of Virtual Impedance Controller For Parallel-Connected Converters In A Microgrid, Manyanda Makoye, Francis Mwasilu, Peter M. Makolo, Jackson Justo

Tanzania Journal of Science

This paper addresses the significant challenge of inaccurate power sharing among Distributed Generators (DGs) in islanded microgrids, which is primarily caused by mismatched feeder and line impedances. Conventional decentralized control solutions often fail to ensure accurate power sharing, especially when line impedances are resistive. To overcome this, the paper proposes a robust, coordinated Virtual Impedance Control (VIC) strategy for DGs. This method implements fixed virtual resistance and virtual inductance to standardize the output impedance characteristics of parallel-connected inverters, thereby minimizing impedance discrepancies and enhancing system stability through increased damping. The theoretical analysis and design of the VIC were validated through …

Relationships Between The Parameters Of The Vegetable Oil Refining Process And Energy Consumption, Umidjon Abdimajitovich Ruziev, Marufjon Kobuljonovich Shodiev

Technical science and innovation

Vegetable oil refining is a multi-stage thermochemical process that is closely related to energy consumption, process parameters, product quality, and food safety requirements. Despite the extensive scientific literature on oil quality and pollutant formation, the quantitative relationship between purification parameters and relative energy consumption has not been sufficiently studied. In this work, a systematic analysis and engineering synthesis were carried out based on existing studies. According to the analysis results, the deodorization process accounts for 52–56% of the total thermal energy consumption, with a relative value ranging from 160 to 380 kJ/kg, depending on the enterprise's capacity and heat utilization …

Impact Of Compositing Method Choice On Spectral Fidelity In Semi-Arid Mining Landscapes, Ruslan Nailevich Khadzhaev, Dilbarkhon Shamuradovna Fazilova

Technical science and innovation

This study examines the choice of satellite image compositing method for Landsat 8/9 (Collection 2 Level-2) imagery to calculate the Normalised Difference Vegetation Index (NDVI). This paper compares the methods used to create median and medoid composites for the Angren open pit coal mine. The 'synthetic' nature of the composites is quantified based on a spectral consistency metric. This involves assessing the equivalence of median and medoid values, and analysing the sensitivity of NDVI to the compositing method across varying surface types. A strongly right-skewed distribution of surface reflectance values was found, covering 82.8% of the pixels, mostly in areas …

Mapping Of Petroleum-Prospective Structures In The Jurassic Complex Of The Western Aral Uplift Based On Seismic Attributes, Yuliya Leonidovna Salaydinova, Marina Georgievna Yuldasheva

Technical science and innovation

To solve the problems of identifying and mapping prospective structures, comprehensive analysis of 3D seismic attributes is widely used at the present stage of geological research; it was applied to assess the petroleum potential of the Jurassic rock complex in the Aral Sea offshore area of the Ustyurt region. The study integrates structural mapping on the tops of Permo-Triassic and Jurassic horizons, attribute volumes (Variance/Coherence, Sweetness, root-mean-square (RMS) amplitude, Envelope) and generalized spectral decomposition (GSD, 19-41 Hz), combined with well-log and well-test data from the Western Aral, Meros, Dengiz and Karakum areas. Variance attributes were used to delineate fault zones …

Theoretical And Practical Foundations Of Healthcare System Digitalization, Sanjarbek Bekturdiev Sharifboyevich Phd, Muxlisa G‘Ulom Qizi G‘Ofurova

Technical science and innovation

The digital transformation of healthcare represents a key direction in improving the accessibility, quality, and efficiency of medical services. This study examines the main components of eHealth, including telemedicine, electronic health records, cloud technologies, and mobile applications, as well as the role of international organizations in promoting national digital health strategies. Particular attention is given to the current state of digital healthcare in the Republic of Uzbekistan, where significant progress has been made in developing infrastructure and implementing information systems, although challenges related to integration, standardization, and regulatory support remain. The work identifies the main trends in the development of …

Development Of New Methods For Calculating Pressure And Energy Losses For Pumping Station Water Intakes, Faxriddin Jaylovovich Nosirov, Oleg Yakovlevich Glovatsky, Jurabek Abdyrahmon O'G'Li Urolov, Abduqodirkhon Samatkhonovich Abdullakhaev, Anvar Mamur Ugli Uzokov

Technical science and innovation

The aim of this study is to improve the efficiency of water resource management methods. Improvements to the water intake of the Karshi Main Canal are considered using calculations of pressure losses at the entry and exit of liquid into the flow, which differ from pressure losses in a stationary medium. The article considers some of the methods for using renewable energy sources, where the change in gravitational potential energy does not depend on the way of using energy and the operating scheme is a gravitational energy pump. The implementation of control and monitoring systems is necessary to ensure optimal …

Dual History Enhancement With Hybrid Hypergraph-Graph Networks For Temporal Knowledge Graph Reasoning, Kailun Ye, Xiangjie Kong, Yuchao Zhang, Xuan Wang, Linan Zhu, Jiaxin Du, Guojiang Shen, Jianxin Li

Research outputs 2022 to 2026

Temporal Knowledge Graph (TKG) reasoning seeks to predict future events by analyzing historical data, where the effective leverage of both local and global historical facts proves crucial. Existing approaches employ graph neural networks (GNNs) and recurrent neural networks (RNNs) for local evolution patterns, complemented by statistical methods to enhance attention to global facts, demonstrating efficient predictive capabilities. However, traditional GNNs, constrained by their low-order neighborhood aggregation design, inherently fail to model potential high-order dependencies among facts. Furthermore, existing global history modeling approaches may introduce irrelevant historical information that interferes with prediction tasks. To address these limitations, we propose a Dual …

Elemental And Mineralogical Characterization Of Permo-Carboniferous Coal In The Ngaka Coalfield, Southwest Tanzania: Implications For Coal Quality Variation, John W. Gama, Justina J. Saroni, Remigius L. Gama

Tanzania Journal of Science

Coal from heterolithic seams exhibits distinct chemical characteristics due to interbedded non-coal beds, which influence its quality and usability. Despite extensive research in these settings, the elemental and mineralogical characteristics of the heterolithic sequences of the Mchuchuma Formation (K2) in the Ngaka Coalfield remain poorly documented. This study provides the first detailed assessment of K2 seams across five active mine sites. Eleven representative samples were analyzed using proximate, elemental, and mineralogical techniques, supported by Pearson correlation, binary analysis, and Principal Component Analysis. Proximate analysis revealed that ash content varies across mine sites, with values ranging from 9.17 to 25.03%, volatile …

Students' Perceptions Of The Flipped Academic Writing Classroom Learning Activities, Muhammad Dzulfiqar Praseno, Utari Praba Astuti, Niamika El Khoiri

Jurnal Pendidikan Humaniora

Flipped-classroom strategy, as the name suggests, flips the conventional teaching and learning process. In a flipped classroom, students learn the materials at home in an online platform (out-class) and then they learn more through discussion with their peers in the classroom (in-class). This study focuses on students' perceptions of the activities in a flipped academic writing classroom. The result shows that the activities were able to help students to learn and improve their academic writing. In addition, students also gave positive responses to the use of teaching media and peer feedback sessions.

Students' Willingness To Communicate In English Through Virtual Classroom, Chotmaniyah Chotmaniyah, Yazid Basthomi, Mirjam Anugerahwati

Jurnal Pendidikan Humaniora

The aim of this study is to describe students' willingness to communicate in English through virtual classroom during Covids-19 Pandemic. This study used descriptive qualitative research design, conducted at SMK Negeri 8 Malang. Data collection methods were obtained from students' responses on questionnaires and compiled with transcripts of the virtual interview result. The finding showed the students preferred to communicate in English written rather than English spoken.

Efl Learning Strategies Employed By Indonesian Successful High School Students, Maharani Khansa

Jurnal Pendidikan Humaniora

Language learning strategies (LLSs) play an essential role in the process of English language learning. This study is aimed at investigating language-learning strategies employed by successful Indonesian EFL high school students. This study is of significance to provide a model of strategies practiced by successful EFL students who manage to develop good command of English regardless certain limitations and challenges they face. The results of this study show the students actively employ a combination of affective and cognitive-social learning strategies to develop their English skills.

The Effectiveness Of Interactive Multimedia To Increase Learning Outcomes Of Deaf Students In Elementary School Level: A Literature Study, Putri Kartika Ningsih, Mohammad Efendi, Ediyanto Ediyanto, Asep Sunandar

Jurnal Pendidikan Humaniora

Salah satu konsekuensi dari hambatan kemampuan pendengaran anak tunarungu adalah kesulitan menerima dan memahami materi pembelajaran verbal atau audio. Penelitian ini dilakukan untuk mengetahui efektivitas pengembangan multimedia interaktif yang dapat berpengaruh positif terhadap hasil belajar siswa tunarungu di tingkat sekolah dasar melalui studi literatur Google Scholar (2015-2021).

Esp Textbook: What The Users' Need?, Sitta Meinawati

Jurnal Pendidikan Humaniora

This study was implemented in a private institution focusing on the ESP textbook employed in the class of management. There were 196 students, 9 ESP instructors, and one ESP expert who participated in this research. The aim was to know their perspectives toward the textbook used.

Bagaimana Keberlangsungan Home Industry Sanitair Melalui Penerapan Pendidikan Ekonomi?, Widya Eka Puspitasari, Sri Umi Mintarti, Lisa Roksmani

Jurnal Pendidikan Humaniora

Tujuan penelitian adalah menganalisis keberlangsungan usaha Sanitair ditinjau dari penerapan pendidikan ekonomi para pelaku usaha. Penelitian ini menggunakan metode kualitatif jenis fenomenologi. Informan penelitian adalah pelaku usaha sanitair yang memiliki usaha lebih dari 20 tahun. Hasil penelitian menunjukkan keberlangsungan usaha sanitair pelaku usaha dikategorikan baik dan berkembang...

English Performance Of The Students Of The English Department From Different Educational Backgrounds, Sakinah Aprilia Dewi, Ali Saukah, Utari Praba Astuti

Jurnal Pendidikan Humaniora

This study aimed to compare school program attended by students in Senior High School based on the score of the English performance. The data collected were in form of participants' individual score of Placement test. The data representing 309 participants divided in to three groups; natural science, social science and language program.

Illocutionary Acts And Politeness Strategies In Efl Classroom Interaction And The Students' Perceptions, Mida Alifia Soviana, Nur Mukminatien

Jurnal Pendidikan Humaniora

This study explores illocutionary acts and politeness strategies employed by the academic staff and also the students' perceptions on the academic staff 's language and politeness strategies in EFL classroom interaction. Twelve different classes of six English academic staff in one term lasting 100 minutes each were observed and recorded and then transcribed. The results showed that four out of five types of illocutionary acts were employed; directive, representative, commisive, and expressive. Concerning the use of politeness strategies in the academic staff s illocutionary acts, bald on-record, positive, negative and off-record politeness strategies were all employed. This study also indicates …

Swear Words In Early Childhood Communication, Yuli Rahayu Indriani, Hardika Hardika, Ach. Rasyad

Jurnal Pendidikan Humaniora

There has many differ perception about the meaning of swear words in daily communication, so that this research's aim was to described those swear word's meaning. The focus of this research is meaning of swear words that said by children age 4-6 years in RA Al-Azhar Bantur. This research used descriptive qualitative method, thereby the collected data was found on research field. The result showed that the swearing words commonly spoken by children was jancuk, taek, bedhes, patek, goblok, gendeng, and jangkrik. Children did not know the meaning of those swearing words, but they assume that swearing is a taboo …

Physical Education Graduates Prospect In Wetland Area, Sunarno Basuki

Jurnal Pendidikan Humaniora

As a university located in wetland are, Lambung Mangkurat University must adapt with the surrounding geographical area to prepare prospective graduates that meets the current local demands. This paper seeks to explore the prospect of Physcial Educatioan Graduates in wetland areas. This paper was a descriptive research which examined the current development of Physical Education to meet the demand of wetland area. This paper showed that some efforts must be performed to improve the graduates of Physical Education Department. The efforts that must be made including: the preparation of professional faculty members, suitable and contextualized curriculum, supporting facilities and infrastructure, …

Speaking Performance And Grammatical Competence Across Cognitive Learning Styles And Strategy Inventory For Language Learning (Sill), Ayu Chandra Agustin, Ekaning Dewanti Laksmi, Suharyadi Suharyadi

Jurnal Pendidikan Humaniora

The correlation between speaking performance and grammatical competence has been a debatable issue. It is also believed that cognitive learning styles and learning strategies are two of the many factors that influence students' language achievement.