Other Engineering Commons^™

Condition Rating Prediction Using An Interactive Deterioration Model Development Package, Minwoo Chang, Mitchell S. Maguire

Durham School of Architectural Engineering and Construction: Faculty Publications

This paper presents an advanced method to determine explanatory variables required for developing deterioration models without the interference of human bias. Although a stationary set of explanatory variables is ideal for long-term monitoring and asset management, the penalty regression results vary annually due to the innate bias in the inspection data. In this study, weighting factors were introduced to consider the inspection data collected for several years, and the most stationary set was identified. To manage the substantial amount of inspection data effectively, we proposed a software package referred to as the Deterioration Model Development Package (DMDP). The objective of …

Study Of The Change In The Concentration Of Metal Ions In Bacterial Oxidation Of Floto Concentrate In The Liquid Phase, K. Sanakulov, B.F. Muhiddinov, S.Sh. Sharipov, A.T. Umrzakov

Gorniy vestnik Uzbekistana

The article presents the results of a study of the qualitative and quantitative analysis of metal ions in the bacterial oxidation of flotation concentrate in the liquid phase by mass spectroscopy. Changes in the concentration of metal ions (Na, Si, K, Ca, Fe, etc.) and ions of noble metals (gold, silver) in the process of bacterial oxidation of flotation concentrate were determined and changes in their concentration in the process were substantiated

Improving The Quality Of Cathodic Precipitation Coming To The Gmz-2 Of The State Enterprise "Navoi Mmc", Adizov L.A., Sh.R. Kodirov, Tazhibaev D.Yu., Ergashev N.U.

Gorniy vestnik Uzbekistana

In this article, the object of research was the cathode precipitation of GMZ-4, obtained by electrolytic precipitation of rich gold-containing solutions after intensive leaching of gravioconcentrates. As a result of the conducted research, to improve the quality of cathode precipitation in the conditions of GMZ-2, the optimal method of nitric acid treatment was chosen. This method is implemented on an industrial scale in the shop of finished products and is used when cathode precipitation is below the required quality

Innovative Centrifugal Concentrator Bowl From Sepro Mineral Systems, Van Kleek Mark, A. Pariy, M. Grodowski

Gorniy vestnik Uzbekistana

Modern centrifugal concentrators have become standard equipment for most precious metal extraction technologies due to their simplicity, cost-effectiveness and efficiency. However, as with any other technology, there is always room for improvement. Sepro Mineral Systems, Canada's largest supplier of mineral processing equipment, has developed a new Frontier centrifugal concentrator bowl (patent pending), which will soon be installed on all Falcon gravity concentrators, and will also be able to serve as a replacement part for most Knelson concentrator models.

Schemes Of Fast Automatic Input Of The Reserve For Electricity Systems With High-Voltagemi Asynchronny Electric Motors, Kholboev G.O., Aliyor Hamidov, Ataullaev A.O., Rasulova B.I.

Gorniy vestnik Uzbekistana

The main purpose of developing a fast-acting automatic reserve inclusion system is to reduce the impact of transition processes, mechanical impacts on engines and current throws while maintaining uninterrupted power supply to the engines at a time when power is disrupted from one of the power sources and the load is switched to the second source.

Paper Recycling Fiber Recapture, Erin Riley

Honors Theses

The goal of the Yoda Chemical Company Paper Recycling Fiber Recapture project and subsequent report was to identify and recommend plant optimization opportunities associated with the potential recovery of five waste streams. Additionally, an analysis of the upgrade’s design was completed in order to determine the economic viability of fiber recapture. Beginning the analysis, the five waste streams were identified and analyzed. The waste streams include the top liner, back liner, and filler liner primary cleaner rejects on the K1 machine, the common rejects from under the K3 paper machine, and the tertiary cleaner rejects from stock preparation.

Two different …

Design Of Outdoor Residential Lighting Fixture, Jenna Vanmarter

Honors Theses

No abstract provided.

Challenges And Suggestions Of Diesel Oil Cleaning System In Unmanned Surface Vessels, Liwei Zhang

Maritime Safety & Environment Management Dissertations (Dalian)

No abstract provided.

The Impact Of Automation On Student's Career Decision, Muhammad Hizkil Imran, Arshveen Ramesh, T Rudran

Introduction to Research Methods RSCH 202

We study the impact of automation on employment and students’ career paths, by obtaining credible datasets from the Government of Singapore. The manufacturing and construction sectors were the most affected industries over the last 15 years. Along with the limited studies, we propose a survey to quantify and analyse students’ views on automation. The shift in employment rate in various sectors due to automation was found to be a contributing factor for students’ career decisions. Based on our findings, we observed that more students are acknowledging the impact of automation and finding the need for job securities and opportunities by …

Bayes’ Network And Smart Sensors: Occupancy Detection, Donald Tryon

Department of Construction Engineering and Management: Dissertations, Theses, and Student Research

This dissertation presents a Bayesian analysis for determining residential occupancy using inexpensive commercially available passive infrared (PIR) motion detectors, compared against two other detectors that were used to establish ground-truth. One of the ground-truth detectors was a GPS signal from a smartphone, the second was a Bluetooth key fob. Data were gathered from four residential locations, and then analyzed to determine occupancy. The occupancy data collected from the PIR sensors were compared against ground-truth to verify the results of the PIR sensor events that were collected every minute for a week. The Bayesian training data that was used to determine …

Framework For Extracting And Characterizing Load Profile Variability Based On A Comparative Study Of Different Wavelet Functions, Andrew Parker, Kevin James, Dongming Peng, Mahmoud Alahmad

Durham School of Architectural Engineering and Construction: Faculty Publications

The penetration of distributed energy resources (DERs) on the electric power system is changing traditional power flow and analysis studies. DERs may cause the systems' protection and control equipment to operate outside their intended parameters, due to DERs' variability and dispatchability. As this penetration grows, hosting capacity studies as well as protection and control impact mitigation become critical components to advance this penetration. In order to conduct such studies accurately, the electric power system's distribution components should be modeled correctly, and will require realistic time series loads at varying temporal and spatial conditions. The load component consists of the built …

Stem Education In College: An Analysis Of Stakeholders’ Recent Challenges And Potential Solutions, Santanu De, Georgina Arguello

FDLA Journal

A vast majority of academic disciplines and curricula in the college center around Science, Technology, Engineering, and Mathematics (STEM), which are critical to developing the skills necessary for a global workforce. Rapid changes in pedagogical setups, educational modes, and advances in instructional technology entail diverse challenges for key stakeholders (i.e. students, faculty, and the organizations). This paper highlights the most relevant challenges and potential solutions in STEM higher education at the college level, reported in the last decade. The holistic analysis combining the three stakeholders’ perspectives would help elucidate significant contemporary aspects impacting the fields. The goal is to further …

Influence Of Fiberboard Container Design On Compression Bulge Displacement, Koushik Saha, Shane Messner, John Dizon, Nirav Chhajed, Jay Singh

Journal of Applied Packaging Research

Bulge effect is the out-of-plane displacement of a panel of a corrugated fiberboard box from its original position. This bulge effect often is the result of excessive weight being placed on a box that rests at the bottom of a palletized load. Panels that are out-of-plane reduce the stacking strength of the box and can result in damage to products inside the containers. This study was designed to find the influence of fiberboard container design on its bulging performance when under compression. The objective of the study was to determine if change in height of a regular slotted container will …

Development Of Reduced Order Models Using Reservoir Simulation And Physics Informed Machine Learning Techniques, Mark V. Behl Jr

LSU Master's Theses

Reservoir simulation is the industry standard for prediction and characterization of processes in the subsurface. However, simulation is computationally expensive and time consuming. This study explores reduced order models (ROMs) as an appropriate alternative. ROMs that use neural networks effectively capture nonlinear dependencies, and only require available operational data as inputs. Neural networks are a black box and difficult to interpret, however. Physics informed neural networks (PINNs) provide a potential solution to these shortcomings, but have not yet been applied extensively in petroleum engineering.

A mature black-oil simulation model from Volve public data release was used to generate training data …

Evaluation Of A Bulge Reduction Technology For Corrugated Fiberboard Containers Under Static Compression, Daan Peleman, Jay Singh, Koushik Saha, S. Roy

Journal of Applied Packaging Research

This research examines the effect of top-to-bottom static compression load on the bulge of RSC containers. The study compares a control regular slotted container (RSC) constructed with corrugated fiberboard to tape-reinforced designs. The bulge reduction, achieved using various tape placements and conditioning environments, were measured. Currently, no research on the effect of reinforcement tape towards reduction in the out-of-plane displacement (bulging) of the corrugated fiberboard panels has been undertaken. Samples related to four different container designs, varying by presence, quantity and the position of the reinforcement tape on the vertical panels, were tested and analyzed. The study involved the use …

Writing Standards-Based Lesson Plans To Standards For Technological And Engineering Literacy, Scott Bartholomew, Thomas Loveland, Vanessa Santana

Faculty Publications

While written lesson plans may seem like a lot of work, with little purpose or benefit to new teachers, a well-written lesson plan is quite valuable for many reasons. The process of writing lesson plans at the beginning of one’s teaching career can be very time-consuming (Arnett-Hartwick and Cannon, 2019); however, the development of sequenced lessons that result in effective learning must be organized and articulate, not done haphazardly. Designing a lesson through a written document can help a teacher see the pattern, flow, and implications of a lesson and how it will help all students; this can be especially …

Моделирование Процесса Сушки Хлопка-Сырца Движущегося Совместно С Сетчатой Поверхностью., Nazirjon Safarov

Acta of Turin Polytechnic University in Tashkent

В работе рассматривается хлопок-сырец и замешанный с ним воздух как непрерывный континуум. Взаимодействий фазы между собой определяется эмпирическими законами, учитывающими действия вязких сил влияние неоднородности поля скоростей, инерционных сил, связанных с присоединенными массами ускоренно движущейся континуума. В результате чего получены теоретические зависимости, характеризующий процесс движения “хлопок + воздушный поток” в конвейерных сушильных камерах.

Method Of Joints: Theory And Practice Of Designing, Building, And Testing Trusses, Andrew J. Hughes, Chris Merrill

Educational Leadership & Technology Faculty Publications

The authors of this article, like many of us, are proponents of engineering education but are also proponents of shop skills, craftsmanship, technological literacy, and the tacit knowledge and skills developed through applying sound theories during practical hands-on learning. The authors believe that engineering is an important aspect of our discipline, but so are the application of thinking, tool skills, measurement, geometric construction, manufacturing, instrumentation, testing and analysis, mathematical and scientific theories, and many other hands-on, minds-on skillsets that all need to maintain association with our discipline. As the authors are proponents for engineering education that is done well, they …

Wind Hazard Resilient Construction Mitigation Decision-Making Using A Multi-Objective Optimization, Erin Gregory

Masters Theses & Specialist Projects

While storms worsen and damage to homes increases, limited information is available about mitigations that are effective in lessening damage to homes and/or buildings. Information on past storms exists within FEMA’s Hazus-MH application, but the information provided by the data within the Hazus-MH application, while very informative on its own, was decidedly more precise and useful when optimized to provide defined information to those responsible for determining building codes or regulations for homes.

The research available from Hazus-MH details results from past storms categorized by building type, mitigations, and intensity of disaster. The data can be used to simulate storm …

Thermodynamic Functions Of Silumin Ak12m2, H.M. Nazarov, Okil Osimi, Ganiev I.N.

Gorniy vestnik Uzbekistana

The article presents the results of studying the thermodynamic functions of silumin grade AK12M2. The temperature and cooling time dependences obtained during the experiment are described by the equations that are necessary for calculating the cooling rate of alloys. It is shown that as enthalpy increases, enthalpy, entropy, specific heat and heat transfer coefficient of alloy AK12M2 increase, and Gibbs energy decreases

Study Of Gold Encapsulation In Maghemite During Microwave Roasting Of Flotation Concentrate, K. Sanakulov, O.U. Fuzaylov

Gorniy vestnik Uzbekistana

The article presents the results of a study of the encapsulation of gold in maghemite during microwave processing of refractory gold-bearing concentrate. The magnetic separation of the MW calcine showed the concentration of gold in the magnetic fraction. The results of XRD analysis confirmed the high content of maghemite in the magnetic fraction. An obvious correlation was found between gold and maghemite, since most of the gold recovered in the magnetic fraction where the maghemite content is 48.7%. Sulfuric acid leaching of the magnetic fraction in order to dissolve iron oxides made it possible to increase the rate of gold …

Inclusions In Granodiorites Of The Auminzinsky Intrusion (Central Kyzylkum), Amirov E.M.

Gorniy vestnik Uzbekistana

Based on a study of the composition, petro- and geochemical features of the inclusions and hostgranitoid rocks of the Auminzatau mountains, their identity was established and a conclusion was drawn on the correspondence of melonratic fragments to the earlier phase of the earlier phase of the granitoid complex under consideration, reflecting the nature of the gravitational differentiation of a single magma chamber, which formed these varieties of intrusive formations

Extraction Of Iron From Acid Waste Solutions Of The Process Of Bioxidation Of Sulfide Gold-Containing Concentrates, Sanakulov U.K., Tazhibaev D.Yu., Ergashev Ulugbek Abdurasulovich

Gorniy vestnik Uzbekistana

The article presents the results of laboratory studies on the extraction of iron from acidic waste solutions of the process of bacterial leaching of sulfide gold-bearing concentrates. The aim of this work is to extract iron from technogenic arsenic-containing acidic wastes, to increase the efficiency of using mineral raw materials with obtaining additional products. The studies were carried out on a solution taken from the biooxidation unit of the NMMC. The main task of this work was to determine the optimal parameters for the processing of acid waste solutions and the separation of iron from the solution without arsenic impurities. …

Prospects For Attracting Foreign Investment For The Development Of Non-Metallic Minerals In The Complex On The Example Of The "Vaush" Deposit, Mirzaev B.A., Sharipov Sh.F., Istablaev F.F.

Gorniy vestnik Uzbekistana

This article provides information about the Dolomites, bentonite clays and quartz Sands of The vaush Deposit located in the Navoi region. The analysis of physical and chemical properties and composition of natural mineral raw materials is carried out. The prospects of developing the “VAUSH” field are proved.

Social Enterprise And Sustainability: Key Factors That Lead To The Successful Establishment Of Sustainable Development Initiatives In Ireland, Gerard Doyle

Doctoral

International research points to the positive impact that social enterprises with an environmental focus (also referred to as sustainable development initiatives) perform in the transition to low carbon societies. This thesis examines the capacities required for the establishment and maintenance of sustainable development initiatives in Ireland. The thesis is based on five pieces of research which are either published in international peer-reviewed publications or of a publishable standard. One of the published pieces provides an explanatory framework addressing the reasons why the social enterprise sector in Ireland is less developed than in a number of European countries, details a number …

The Irish Construction Industry’S State Of Readiness For A Bim Mandate In 2020, Barry Mcauley, Alan V. Hore, Roger P. West

Conference papers

It was recently announced that a BIM mandate for the Irish public sector is not imminent, suggesting that the sector is not yet ready for what such a mandate implies. Following on from a forward-looking BIM Roadmap for Ireland in 2017 and the publication by the authors of a detailed BIM in Ireland study in 2017 and 2019, what is the actual state of readiness for a more general BIM mandate in Ireland? This paper will review recent publications, seminars and industry initiatives on this topic of interest supported by an online survey to assess the current state of readiness …

The Effects Of Relational And Social Behaviors Exhibited By Construction Project Team Members On Relationship Quality And Project Outcomes, James Ogechi Kereri

LSU Doctoral Dissertations

Relational and social behaviors of construction project team members explain team relationships. Whereas relational behaviors have often been studied in construction project team relationships, the current literature is deficient on the social behaviors. The literature review revealed seven relational behaviors (i.e., harmonization of conflict, propriety of means, restraint of power, reliance and expectation, contractual solidarity, flexibility, and reciprocity) and three social behaviors (i.e., past experience, benevolence, and integrity) commonly exhibited by construction project team members. Through a binomial logistic regression, research findings revealed that past experience was a significant (p < 0.01) predictor for five of the seven relational behaviors while benevolence and integrity were each significant (p < 0.01) predictors for three of the seven relational behaviors. Overall, out of the seven relational behaviors, only propriety of means is predicted by all the three social behaviors. Through multinomial regression, the results indicated that there is not enough evidence to show a relationship between the dimensions of relationship quality and project outcomes. However, there is a relationship between relationship embeddedness and project outcomes. Through internal and external validation, the prediction models performed well based on both positive predictive values and negative predictive values.

From a relationship management standpoint, this research introduces relational and …

Fault-Tolerant Capability Of Star Connected Symmetrical Six-Phase Induction Machine With Single And Two Isolated Neutrals, Wan Noraishah Wan Abdul Munim

Student Works (2020-2029)

Traditionally, electrical machines have been designed to operate with single- or three phase power supplies. In the early stage of power electronics development, three-phase machine suffers problems such as high torque ripple due to low order harmonics during six-step switching and limited current handling capacity of the power switches. This has motivated the use of multiphase machines which is capable of mitigating the aforementioned issues. The revival of multiphase machine research is mainly motivated by the need for more reliable drive systems. The vector space decomposition (VSD) model is used for a healthy multiphase machine as the basis for control …

Nonlinear Innovation Identification For Ship Maneuvering Modeling Via The Full-Scale Trial Data, Chunyu Song

Maritime Safety & Environment Management Dissertations (Dalian)

No abstract provided.

Numerical Simulation And Evaluation For The Airflow Field Of Surface Ship, Wenxuan Ma

Maritime Safety & Environment Management Dissertations (Dalian)

No abstract provided.