Engineering Commons^™

New Sorbents For Adsorption Cleaning Phenol-Containing Waste Water Refinery, Bahodir Bahramovich Kakharov, Uchqun Vafokulovich Umarov

Journal of Tashkent Institute of Railway Engineers

The article discusses some issues of creating new adsorbents based on local raw materials and waste for the purification of phenol-containing wastewater from refineries. Studied some sorption properties of new sorbents

Production Of Fire-Resistant Concrete Based On Technogenic Waste, Uzmonjon Turgunaliyevich Yusupov

Journal of Tashkent Institute of Railway Engineers

The article notes that at present, with the development of the construction industry, the need for fire-resistant concrete is also increasing. In increasing the volume of construction, concrete and other components are some of the resources available at the price of finished objects achieved through cost reduction. It is determined that the developed fire- and heat-resistant concrete, prepared according to the technological requirements developed by us and the established standards, will provide the facility with reliable fire safety and longevity

Development Of A Mathematical Model For Calculating The Strength Of The Main Frame Of The Vl80s Electric Truck Body For Railway Engineering, Galina Khromova, Sergey Khromov, Davran Radjibaev

Journal of Tashkent Institute of Railway Engineers

A mathematical model was developed for the main body frame of the VL80s locomotive for railway engineering, including the justification of the design modes available in operation, the calculation of quasistatic characteristics for static loading modes, for single-thrust and double-thrust modes, for compression and tension modes. A calculation is also made on the effect of distributed inertial loads, then the power factors and stresses in the calculated sections of the main body frame of the VL80s electric locomotive are calculated. Summarizing conclusions are given on the maximum voltages in the design modes of the main frame of the VL80s electric …

Features Of Power Converters For Operation Of Electric Locomotives, Malika Nabievna Tuychieva

Journal of Tashkent Institute of Railway Engineers

The work analyzed features of technical characteristics of AC electric locomotives from other electric locomotives used in Uzbekistan. Converters are installed in the power circuit, with GTO (lockable thyristor) for electric locomotives "Uzbekistan," and for electric locomotives "Uzbekistan - yulovci" with IGBT (bipolar transistor with isolated gate). In general, two main current converters are installed on the locomotive. Each of them consists of four-quadrant pulse rectifier with three coordinates, intermediate DC link and 2 types of voltage inverters. One inverter serves for two frame-controlled bogie motors, the other for one axial-controlled bogie motor. In case of damage to any traction …

To The Conclusion Of The Variational Equation Of Motion Of Shell Structures Supported By Frames And Stringers, Farkhod Erkinovich Abdukadirov

Journal of Tashkent Institute of Railway Engineers

In this article is given the construction of the variational equation of motion of the shell structure supported by frames and stringers. Using the Hamilton - Ostrogradsky variational principle, systems of differential equations of motion of shell elements are obtained.

Damping Cell From Gallium Arsenide With Plasma Contacts In An Extreme Gas Discharge Cell, Khurshidjon Tolibovich Yuldashev, Sherzod Sodikjonovich Akhmedov, Jasurbek Mahammadovich Ibrohimov

Journal of Tashkent Institute of Railway Engineers

The results of an experimental study of the photocurrent in a semi-insulating gallium arsenide with plasma contacts are presented in order to identify the conditions under which the generation interaction of a plasma by a semiconductor becomes significant. The experimental data are compared with the results predicted by the simplified theory.

Resource-Saving Maintenance And Repair Of The Traction Transformer Based On Its Diagnostics, Mirzhalil Sagatovich Yakubov, Kamolbek Hamidovich Turdibekov, Absaid Khurramovich Sulliev

Journal of Tashkent Institute of Railway Engineers

Based on a generalized analysis of the compiled mathematical model of the maintenance and repair system of a traction transformer of an electrified railway, a resource-saving strategy is made based on the use of the results of technical diagnostics and providing the calculation of the optimal periodicity of the overhaul periods according to the values of the practical probability of failures, the number of factors wagging on Actual residual life and exploited in various operating conditions oviyah his work.

Choosing The Optimal Scheme Of Placement Of Thermal Trains On The Chart Of The Movement Of Trains, Muslimа Djalalovna Akhmedova, Dilmurod Baхodirovich Butunov, Sardor Askarovich Abdukodirov

Journal of Tashkent Institute of Railway Engineers

To analyze the methods of selecting the optimal scheme of layout of thermal trains at railway stations. Graphic and mathematical modeling methods are used. The factors influencing the selection of the optimal train schedule have been identified.Existing trains of thermal trains have been analyzed the schemes and mathematical formulas have been developed. Frequently used mathematical formulas at the railway stations, thermal trains create smooth and efficient traffic, and the train traffic destroys the possibility of direct adjustment.

To The Question Of Dispatching Regulation Of Overtaking Freight Trains, Samandar Bahtiyorovich Sattorov, Ruslanovna Ibragimova Gulshan, Daurenbek Ihtiyarovich Ilesaliev

Journal of Tashkent Institute of Railway Engineers

This article discusses the problems of the influence of accelerated freight trains on station and distillation intervals, as well as on a simple freight train under overtaking. The relevance of this article is due to the fact that irrational dispatch regulation of overtaking of freight trains with accelerated trains negatively affects the throughput of the railway line.

Linking Train Schedule Assignments To A Solid Schedule, Alexander Aleksanlrovich Svetashev, Nodir Qodirovich Aripov, Nargiza Faritovna Svetasheva

Journal of Tashkent Institute of Railway Engineers

The article provides an analysis of the composition of the sorting station during the accumulation of trains and the formation of trains with their departure on a solid schedule in order to establish dependencies that allow you to determine the cost of wagon-hours for the accumulation of cars and the rationale for the use of a solid schedule. The paper highlights the features of the process of accumulation of cars with a solid schedule as opposed to accumulation with a flexible schedule. As a result of modeling the composition of the solid schedule, the necessary parameters were calculated, which were …

Results Of Application Of The Methods “Conditional Group Sorting” And “Combinatorial Sorting” Duringthe Multi-Group Trains Formation, Sakijan Kabildjanovich Khudayberganov, Shinpolat Mansuraliyevich Suyunbayev, Alfiya Mirkhatimovna Bashirova, Sherzod Bakhromugli Jumayev

Journal of Tashkent Institute of Railway Engineers

At present, the formation of multi-group freight trains on the sorting stations is the actual issue. The main raisons are: there is no exact (developed) technology, in order to form multi-group trains on the sort stations and also, formation of such type of trains according to the established procedure based on many years of experience of the relevant personnel. In this article, the results of the applied methods are presented “Conditional group sorting” and “Combinatorial sorting” during the multi-group trains formation on the sorting station JSC Uzbek Railways. The efficiency of the method “Conditional group sorting” has been revealed regarding …

Three-Way Thermal Model Of Asynchronous Traction Engines For Diagnostics Of Their Technical Condition, Zhavkharbek Sulton Ugli Fayzullaev

Journal of Tashkent Institute of Railway Engineers

Mathematical models of the thermal processes of traction induction motors are developed. An induction motor is considered as a thermal system consisting of three bodies (stator winding, stator magnetic circuit and rotor), in which heat transfer is taken into account not only between the respective bodies, but also heat transfer between each body and the environment. It is shown that the steady-state excess of the stator winding temperature of a traction induction motor depends on the multiplicity of the stator winding current, the coefficient of electrical energy loss, and also on the temperature coefficient of resistance of the material of …

An Example Of Calculating The Speed Of The Railway Carriage On The Accelerating Slope Of The Hump, Shukhrat Batirovich Djabbarov

Journal of Tashkent Institute of Railway Engineers

The paper content is based on classic provisions of mechanics (D’Alembert principle) for non-ideal communication. The authors provide with the analytical proof of that the linear acceleration of the car when it is uniformly accelerated along the descending part of the hump depends on the force that affects the car to roll down the slope of the hump, on the force of resistance of all kinds, on the adjusted weight of the car with load taking into account the moment of flywheel action. At the same time, the results of calculations prove that the rotating parts weight practically does not …

Petrology, Physicochemical And Thermal Analyses Of Selected Cretaceous Coals From The Benue Trough Basin In Nigeria, S. A. Akinyemi, O. F. Adebayo, B. B. Nyakuma, A. K. Adegoke, O. A. Aturamu, O. A. Olaolorun, A. Adetunji, James C. Hower, Madison M. Hood, A. Jauro

Center for Applied Energy Research Faculty and Staff Publications

Abundant coal resources that were previously neglected due to a crude oil boom need revitalisation and integration into the national electricity mix to address the energy demands of the Nigerian population. Selected coal samples from the Benue Trough sedimentary basin in Nigeria were examined by various techniques, including proximate and ultimate analyses, organic petrography, Fourier transform infrared ray spectroscopy, and thermogravimetric analysis. Based on vitrinite reflectance, the Lafia-Obi (OLB), Garin Maiganga (GMG), Imiegba (IMG), and Okaba (OKB) coals are classified as subbituminous, while the Lamja1 (LMJ1), Lamja2 (LMJ2) and Chikila (CHK) coals are high volatile B bituminous. The Enugu (ENG) …

Analysis Of Feature Extraction In Knee Cartilage Semantic Segmentation Convolutional Neural Networks, Logan Thorneloe

Undergraduate Honors Theses

Recent advances in deep learning and convolutional neural networks (CNNs) have shown promise for automatic segmentation in magnetic resonance images. However, because of the stochastic nature of the training process, it is difficult to interpret what information networks learn to represent. This study explores multiple difference metrics between networks to determine semantic relationships between knee cartilage tissues. It explores how differences in learned weights and output activations between networks can be used to express these relationships. These findings are further supported by training multi-class networks to segment multiple tissues to compare network accuracy across different tissue combinations. This study shows …

Gender Diversity In The Aviation Workplace, Lindsay Stevenson, Haydee Cuevas, Katie Kirkpatrick, Katya K. Rivera, Marisa Aguiar

Student Works

In the past 90 years, the workforce has been diversified in many fields yet gender diversity for occupations in the aviation domain (e.g., pilots, air traffic controllers, aircraft maintenance technicians) has grown slowly. To explore this issue, the objective of this archival study was to examine the increase in the number of females and males from 2005 to 2018 for six aviation occupations in the private sector (civilian) in the United States: aircraft pilot and flight engineer; air traffic controller and airfield operations specialist; aerospace engineer; avionics technician; aircraft mechanic and service technician; and aircraft structure, surfaces, rigging, and systems …

Porosity Prediction Of Granular Materials Through Discrete Element Method And Back Propagation Neural Network Algorithm, Yu Liu, Miaomiao Li, Peifeng Su, Biao Ma, Zhanping You

Michigan Tech Publications, Part 1

Granular materials are used directly or as the primary ingredients of the mixtures in industrial manufacturing, agricultural production and civil engineering. It has been a challenging task to compute the porosity of a granular material which contains a wide range of particle sizes or shapes. Against this background, this paper presents a newly developed method for the porosity prediction of granular materials through Discrete Element Modeling (DEM) and the Back Propagation Neural Network algorithm (BPNN). In DEM, ball elements were used to simulate particles in granular materials. According to the Chinese specifications, a total of 400 specimens in different gradations …

A New Ectotherm 3d Tracking And Behavior Analytics System Using A Depth-Based Approach With Color Validation, With Preliminary Data On Kihansi Spray Toad (Nectophrynoides Asperginis) Activity, Philip Bal, Damian Lyons, Avishai Shuter

Faculty Publications

The Kihansi spray toad (Nectophrynoides asperginis), classified as Extinct in the Wild by the IUCN, is being bred at the Wildlife Conservation Society’s (WCS) Bronx Zoo as part of an effort to successfully reintroduce the species into the wild. Thousands of toads live at the Bronx Zoo presenting an opportunity to learn more about their behaviors for the first time, at scale. It is impractical to perform manual observations for long periods of time. This paper reports on the development of a RGB-D tracking and analytics approach that allows researchers to accurately and efficiently gather information about the toads’ behavior. …

Deep Generative Models For Semantic Text Hashing, Suthee Chaidaroon

Engineering Ph.D. Theses

As the amount of textual data has been rapidly increasing over the past decade, efficient similarity search methods have become a crucial component of large-scale information retrieval systems. A popular strategy is to represent original data samples by compact binary codes through hashing. A spectrum of machine learning methods have been utilized, but they often lack expressiveness and flexibility in modeling to learn effective representations. The recent advances of deep learning in a wide range of applications has demonstrated its capability to learn robust and powerful feature representations for complex data. Especially, deep generative models naturally combine the expressiveness of …

Engaging First Year Students With Intellectual Property, Marian G. Armour-Gemmen

Faculty & Staff Scholarship

Since intellectual property is so important to engineers, creating enthusiasm from the beginning of their engineering studies is imperative. Since first year students have not learned how to apply technological concepts to real life, demonstrating intellectual property could be a challenge. To engage first year engineering students in the concept and the value of intellectual property, students were introduced to basic concepts and applications. Different concepts were applied to real life examples allowing them to interface with technology from an intellectual property perspective. This paper highlights not only patents, but also trademarks and trade secrets.

Illuminator, Volume 3, Issue 7, Batten College Of Engineering & Technology, Old Dominion University

College of Engineering & Technology Newsletter

March 2020 issue of Illuminator, a monthly publication of ODU's Batten College of Engineering and Technology.

Innovative Solutions To Overcome Educational Lab Limitations, Farman A. Moayed

Department of Built Environment

No abstract provided.

Integrate A Conflict Resolution Session Into The Freshman Engineering Problem Solving Course To Improve Students’ Ability To Solve Interpersonal Team Conflicts, Xinyu Zhang, Jeremy G. Roberts

Faculty & Staff Scholarship

The project-based freshman engineering course entitled “Engineering Problem Solving I” in the Fundamentals of Engineering Program (FEP) at West Virginia University (WVU) requires students to work in teams to complete engineering design projects. Many students are lacking in their team dynamics, particularly in handling inter-team conflicts, which can seriously hinder their learning and future coping with conflict. When a conflict happened within a team, students hesitated to enforce their team charters, which defines the project parameters and the team’s standard of conduct. Some students avoided confronting the difficult team members, some waited for the instructor to handle the issues for …

Evaluating The Applicability Of Biostimulated Calcium Carbonate Precipitation To Stabilize Clayey Soils, Md Touhidul Islam, Bhaskar C.S. Chittoori, Malcolm Burbank

Civil Engineering Faculty Publications and Presentations

Clayey soils with medium to high plasticity are prevalent in several parts of the world, causing billions of dollars in damage annually to various civil infrastructures. Several ground-improvement techniques can be employed to counteract this issue. However, these methods are impractical in certain situations and unsustainable in others due to their economic and environmental impacts. Microbial-induced calcite precipitation (MICP) could provide a more sustainable alternative. Researchers have successfully used MICP to alter specific geotechnical properties of sands and silts. This research investigates the applicability of MICP via biostimulation to treat clayey soils with low to high plasticity. The goal is …

New Stanford Hospital, Fpe 2020 Student

Fire Protection Engineering: Culminating Experience Project Reports

This report is the compiled culminating project for the Fire Protection Engineering Master’s Program at Cal Poly, SLO. Addressed herein is the fire protection and life safety approach for the New Stanford Hospital in Palo Alto, California in accordance with the 2012 NFPA 101 – Life Safety Code and the 2016 California Building and Fire Codes. This includes review of building occupancies, construction type, fire-resistive ratings, means of egress, and fire protection systems. The objective of this report is to review the impact of major fire scenarios on life, property, and operations.

The New Stanford Hospital is a Type IA …

A Blockchain Approach To Social Responsibility, Augusto Bedin, Wander Queiroz, Miriam A M Capretz, London Hydro

Electrical and Computer Engineering Publications

As blockchain technology matures, more sophisticated solutions arise regarding complex problems. Blockchain continues to spread towards various niches such as government, IoT, energy, and environmental industries. One often overlooked opportunity for blockchain is the social responsibility sector. Presented in this paper is a permissioned blockchain model that enables enterprises to come together and cooperate to optimize their environmental and societal impacts. This is made possible through a private or permissioned blockchain. Permissioned blockchains are blockchain networks where all the participants are known and trust relationships among them can be fostered more smoothly. An example of what a permissioned blockchain would …

Deal: Differentially Private Auction For Blockchain Based Microgrids Energy Trading, Muneeb Ul Hassan, Mubashir Husain Rehmani, Jinjun Chen

Publications

Modern smart homes are being equipped with certain renewable energy resources that can produce their own electric energy. From time to time, these smart homes or microgrids are also capable of supplying energy to other houses, buildings, or energy grid in the time of available self-produced renewable energy. Therefore, researches have been carried out to develop optimal trading strategies, and many recent technologies are also being used in combination with microgrids. One such technology is blockchain, which works over decentralized distributed ledger. In this paper, we develop a blockchain based approach for microgrid energy auction. To make this auction more …

Differential Privacy Techniques For Cyber Physical Systems: A Survey, Muneeb Ul Hassan, Mubashir Husain Rehmani, Jinjun Chen

Publications

Modern cyber physical systems (CPSs) has widely being used in our daily lives because of development of information and communication technologies (ICT).With the provision of CPSs, the security and privacy threats associated to these systems are also increasing. Passive attacks are being used by intruders to get access to private information of CPSs. In order to make CPSs data more secure, certain privacy preservation strategies such as encryption, and k-anonymity have been presented in the past. However, with the advances in CPSs architecture, these techniques also need certain modifications. Meanwhile, differential privacy emerged as an efficient technique to protect CPSs …

A Bridge-Rehabilitation Strategy Based On The Analysis Of A Bridge-Inspection Data Set, Liam Dromey, Kieran Ruane, John J. Murphy, Brian O'Rourke, Seán Lacey

Publications

Bridge-management systems (BMSs) allow bridge owners to assess the condition of their bridge stock. However, not all BMS packages have the capability to formulate network-level bridge-rehabilitation investment strategies. This research has developed a decision-support system for bridge owners in the selection of the best strategy for bridge rehabilitation at the network level. The basis of the research is an available data set of 1367 bridge-inspection records for County Cork, Ireland, that has been prepared to the Eirspan BMS inspection standard. The developed system consists of a project-prioritisation procedure that builds on previous research, a methodology for the calculation of a …

Integration Concept Of Injection, Forming And Foaming: A Practical Approach To Manufacture Hybrid Structures, Saeed Farahani, Sai Aditya Pradeep, Srikanth Pilla

Publications

Motivated by the concept of the integrative production systems, the hybrid process of polymer injection molding and sheet metal forming, known as polymer injection forming (PIF), has been introduced to manufacture sheet metal-polymer components in a single operation. Despite the wide potential application of this technology, its implementation in actual industrial production has been hindered due to several challenges; a thick layer of polymer where there is deep deformation, non-uniform deformation due to pressure loss and the opposite phenomena of shrinkage and springback. To mitigate these practical issues, the novel idea of integrating supercritical fluid (Sc.F.) technology with the PIF …