7264 research outputs found
Sort by
LOCALIZATION OF AXIAL AND RADIAL DISPLACEMENT IN AIR-CORE TRANSFORMER USING FREQUENCY RESPONSE ANALYSIS
No full textThe axial and radial displacement of transformer windings can lead to significant defects,
accounting for a large proportion of transformer failures. These defects not only result
in power outages but also pose serious safety
risks. This paper presents a novel methodology for the localization of axial and radial
displacement in air-core transformers. Utilizing Frequency Response Analysis (FRA) coupled with deterministic algorithms. The proposed approach involves analytical modelling
of the transformer, data collection through software simulation, and measurements. By creating a comprehensive lookup table for potential winding displacements, this method leverages software simulations in Python and SPICE
to accurately predict and identify the location
winding deformations. The deterministic algorithm is implemented as a key factor in the reliable prediction of such displacements
DESIGN OF A MULTI-STORY OFFICE BUILDING IN LOS ANGELES
No full textThis capstone project report presents the comprehensive design and analysis of a multi-story office building located at 516 W Pico Blvd, Los Angeles. The project aims to address the architectural, structural, geotechnical, environmental, and construction management aspects of constructing a high-rise building in a seismically active and geotechnically complex region. The building, with a height of 44.5 meters and a total floor area of 15950 square meters, is designed to house both office and commercial spaces, ensuring energy efficiency, sustainability, and compliance with local building regulations.
The architectural design prioritizes natural lighting, ventilation, and energy-efficient features, such as high-performance glass and solar panels, to achieve LEED certification. Structural design focuses on seismic resilience, incorporating advanced techniques like moment frames and dual force resistance systems. Geotechnical investigations address the soil profile, seismic analysis, and foundation design to ensure stability and safety.
Environmental engineering efforts include a robust waste management plan, emphasizing recycling, composting, and potential methane recovery. Construction management outlines the project charter, scheduling, cost estimation, risk assessment, and quality management to ensure successful project delivery.
Overall, this project contributes to the development of sustainable and resilient infrastructure in Los Angeles, enhancing the city's commercial real estate landscape while meeting stringent safety and environmental standards
ENHANCING KAOLIN CLAY EXTRUSION FOR HIGH-PRECISION 3D PRINTING: MATERIALS, PROCESS OPTIMIZATION, AND RHEOLOGY
No full textThe present research aims to find the best kaolin clay extrusion conditions, suitable for this technology, which would result in an increase in efficiency and quality of the products. Kaolin clay, which is renowned for its thermal stability and compatibility with complex forms, is the main focus of the research because of the growing use in the 3D printing processes worldwide for the manufacturing industries. Research is restricted by the fact that it relates only to kaolin clay and its rheological properties which are specific to the results. The first target is to develop a predictive model that will accurately define the extrusion pressure needed for kaolin clay, using the rheological parameters as a basis. The involved work focuses on the detailed performance of these parameters, such as yield stress, consistency index, and flow index, and their role in extrusion. The methodological approach of the study brings together the experimental determination of kaolin viscosity behavior with the FEA simulations in COMSOL Multiphysics. Sample preparation, performing the rheological measurements, and extruding with a ram extruder are the experimental methods that are used. On the other hand, FEA simulations are meant to recreate the extrusion process and verify experiment results. The results demonstrate that the physical properties of kaolin paste have a strong bearing on its extrusion behavior, and so the rheological properties should be taken into consideration during the printing process so as to optimize the outcome. The study is able to confirm the relation between the experimental results and the computer simulation, all of which confirm the predictive model's accuracy. The topic of the presentations will be the impact on the 3D printing business brought about by these revelations. There is a probability that defective printing can be avoided, and more efficient printing can be achieved through better knowledge of material properties. The study concludes the importance of the exact assessment of rheological parameters and the accurate 3D printing process simulation for bettering of kaolin clay extrusion in 3D printing. Research into the material properties and optimization of the extrusion process should be carried out
FANDOMAT: REVERSE VENDING MACHINE
No full textThe overwhelming production of plastics, with an estimated 6.3 billion tonnes manufactured globally from 1950 to 2018, has led to a dire environmental crisis. A minimal fraction of this plastic has been recycled or incinerated, leaving a significant impact on the environment and public health. The improper disposal and burning of plastic release toxic substances such as phthalates, heavy metals, and bisphenol A into food, water, and the air, posing severe risks to living organisms. Additionally, the durability of plastics contributes to marinepollution, where they degrade into microplastics that harm marine life. Addressing this issue requires legislative measures to limit plastic waste and regulate the use of harmful additives. The plastics industry must take responsibility for the lifecycle of its products through recycling or upgrading programs. Innovative solutions like Reverse Vending Machines (RVMs), exemplified by the Fandomat, offer a promising approach to mitigate these adverse effects. By incentivizing recycling through monetary rewards for depositing glass, metal, and plastic bottles, RVMs aim to bridge the gap between environmental conservation efforts and community engagement, promoting resource conservation, recycling behaviors, and waste reduction as long-term goals
WEB-BASED VIDEO EDITOR
No full textThis thesis describes the development of a web-based video editor that functions entirely on the client side, thus avoiding any server-side processing. The main goal of this project is to deal with frequently occurring problems in current web-based video editors: resource-intensiveness, slow experience, and privacy risks from server-run video processing. Featuring improved performance, bandwidth saving, and security/privacy by utilizing the WebCodecs and Service Worker APIs provided by modern web browsers with several optimizations.
The video editor can do real-time manipulation of frames on a video, changing opacity, color, saturation, brightness, and adding blur effects. Users can upload multiple videos for editing, perform trimming and track removal operations, and export videos in multiple ratios and resolutions. With the easy-to-use and intuitive interface, users can navigate and control their way through to a hassle-free editing experience.
This thesis describes building and developing the functions of the video editor and analyses problems encountered and ideas used to solve them. Performance evaluations show huge improvements in export times and reduced file sizes compared to current server-side and client-side video editors. The project ends by listing possible extensions such as support for audio manipulation, animations, auto-captioning with AI, and more advanced text overlay functionalities. With this work, we seek to make a high-speed, safe, and user-friendly application that can be integrated with similar applications in web video editing
SELF-SUSTAINING WIRELESS COMMUNICATION NETWORKS
No full textThe increasing demand for wireless communication systems and the associated challenges of
maintenance costs and environmental impact arise the need for sustainable and efficient energy
sources. This work is about designing an RF energy harvesting system for wireless communication
networks. The metamaterial (MTM) absorbers were selected as the main components of the RF
system. MTM absorbers have unique properties and near-ideal absorption, which makes them good
candidates for energy harvesting. The MTM absorbers were studied in a literature review to select
the best fundamental structure for a unit cell. The absorber was designed and simulated using a
CST simulator and operated at 29.5 GHz. The simulation results show good absorption rates and
impedance matching between the ports. The experimental setup was built to test the manufactured
design. The setup consisted of an anechoic chamber, signal generator, horn antenna, RF cables, a
3D model of the stand, a spectrum analyzer, and an MTM absorber. A power budget was calculated
to not damage the equipment and compare input and output results. The results of the experimental
measurements were analysed and compared with the simulation results
TECTONIC ANALYSIS OF AKTOBE AND ZHANKORGAN VALLEYS OF THE BOLSHOI KARATAU CARBONATE PLATFORM
No full textBolshoi Karatau Mountains in the south of Kazakhstan expose a Devonian-Carboniferous carbonate platform exposing several formations which exhibit some strong patterns of multiphase heavy deformations. Aim of this study is to analyse valley-scale details of Aktobe and Zhankorgan sections of the Bolshoi Karatau mountains, including folds, veins, and formations and how they connect between the valleys. The results are expected to shed light on the tectonic overprints on the carbonate platform and the overall deformation features on the region.
So far 7 formations have been mapped all dipping southwest as part of the northern limb of a big synclinal structure while a smaller portion of the formations comprise the southern limb. Cross-sections reveal substantial folding events in the middle of the valley that are positioned at ad angle in relation to the strike-slip fault proposed by Alexeiv et al. (2009). Findings in this paper reveal a higher lateral connection between formations and structures and hence propose an emphasized study of the same formations of the same northwestern limb of the big syncline across the two valleys. Comparatively, the connection between two limbs of the big syncline at the Aktobe valley is poorly understood due to strike-slip faulting that cuts across the big synclin
FUNCTIONAL ANALYSIS OF TYRO3 ISOFORMS IN BLADDER CANCER CELLS
No full textBladder cancer (BC) is the 10th most common cancer type both in men and women and its incidence increases with age. TYRO3 is increased in 50% of muscle invasive bladder cancer (MIBCs), and TYRO3 overexpression confers TYRO3 dependence on bladder tumor cells. The downregulation of TYRO3 was linked to a decrease in bladder cancer cell growth and TYRO3 knockdown caused bladder cancer cell cycle arrest. The utilization of distinct BC cell lines in the investigations may imply that inhibiting TYRO3 has distinct effects. This thesis work hypothesizes that alternatively spliced TYRO3 isoform 2 is present in the nucleus of T24 and RT112 bladder cancer cells and regulates gene expression. Molecular cloning techniques were used to construct the recombinant plasmid, which were further transfected into T24 and RT112 cell lines and expression of protein were analyzed by Western Blotting method. The results of the thesis project are thoroughly presented and future perspectives are described
FDM PRINTABILITY OF RECYCLED MATERIAL: INVESTIGATION OF MECHANICAL PROPERTIES & SURFACE CHARACTERISTICS
No full textThe main objectives of this study are to investigate the effect FDM 3D printing with
different parameters on mechanical properties of the material and to investigate the effect
of recycling and reuse of the material on its mechanical characteristics. The project consists of cyclical experimental testing and recycling, the results of which are analyzed using the Taguchi method. The material for the research is a polylactic acid, also known as
PLA, and the focused printing parameters are infill pattern, infill density and extrusion
temperature. For infill pattern triangular, tri-hexagonal and octet shapes were investigated
and for infill density and printing temperature 40,60,80 percent and 190,200,210°C were
taken correspondingly. For design of the experiment the L9orthogonal array Taguchi
method was used, resulting in total of 9 samples. After printing, specimens underwent
through tensile, hardness and bending tests on the corresponding equipment. After, the
material was recycled - the tested specimen were then shredded, palletized and then
extruded as a new filament. The recycled PLA went through the same tests and after that
the material was recycled and tested again. All in all, 3 runs of experiment were conducted
for virgin PLA and for 2 iterations of recycling. Overall, according to results, the optimal
printing parameters for the virgin material were 80 percent infill density, 200°C extrusion
temperature and tri-hexagonal shape infill pattern. After recycling, tensile and bending
properties of the PLA decreased and the effect of the parameters changed. However, with
proper printing parameters such as 80 percent infill density, 190°C extrusion temperature
and tri-hexagonal shape infill pattern, recycled PLA can give close to the virgin material
results of tensile, hardness and bending tests
PARTY SYSTEMS AND DEMOGRAPHIC CHANGE IN THE REPUBLIC OF KAZAKHSTAN
No full textii. Abstract.
This study attempts to answer the question of how demographic changes shape what a country’s party system is, as little research has been done on youth wing and youth quota. In particular, party system changes and party system stability literature never studied loyalty of young voters and perceived activities of youth wing “Zhastar Rukhy” and youth quota and vice versa. Therefore, this study looks at whether and how youth wing and youth quota, party system stability and party system change relate to one another.
Empirical evidence has been gathered using mixed-method research to study the issue of youth voting in Kazakhstan. This research involved data collection in 17 regions and 3 cities of Kazakhstan. Youth online surveys were conducted to explore the perceived activities of the youth wing called “Zhastar Rukhy” and youth quota, as well as socio-demographic factors that might impact voting for the Amanat party through satisfaction with the creation of the youth wing and youth quota. The semi-structured interview was used to complement the online survey results by studying the professional views and work experience of Members of Parliament (MPs), deputies of Maslikhats and others on the role of youth wing and youth quota in youth voting, including voting for the Amanat party.
The research findings suggest that the youth wing’s mobilization and their ability to pay attention to youth issues in Parliament significantly impact voting for the Amanat party. Additionally, the satisfaction level among young people with the creation of a youth wing and youth quota has a positive effect on their voting for the Amanat party. The results of a semi-structured interview with the political elite indicate that in terms of socio-demographic characteristics (age, ethnicity, language, education) everything matters. Moreover, youth leaders who support party can influence significant portions of peers. If youth are involved in party activities, they will remain with Amanat party.
The policy implication is that if the ruling Amanat party wants to remain in power, it must invest more resources in ensuring the success of the youth wing, “Zhastar Rukhy.” Specifically, establishing mentoring of youth wing employees under the guidance of experienced Heads of regional political departments of the Amanat party. This will give Amanat party move away from a centralized form of management to decentralized one, evaluate activities and nominate employees. It will also contribute to creation of youth projects with diverse needs of youth focus – groups (disabled, unemployed, rural, and urban youth) as well as develope political youth leadership in rural and urban areas of youth wing.
Keywords: youth wing «Zhastar Rukhy», youth quota, Amanat party, Kazakhstan, party system stability, party system change, party system indexes, fluidity index