Mechanical Engineering Commons^™

Technological Features Of Moistening Of Technical Seeds, O. Matchanov, B. Tuxtamishev

Irrigation and Melioration

This article describes the technological features of the reduction of technical varieties of cotton. Requirements for technical seeds in the processing of raw cotton are technical specifications and quality indicators. Seeds of technical cotton with quality indicators and adapted technical seeds must meet the requirements of technical conditions. The technical need for coated seeds should correspond to technical characteristics, such as reducing production costs, reducing moisture, long-term storage, improving quality, thermal conductivity, aerodynamic resistance, and heat resistance. From the point of view of heat treatment of seeds, parameters taking into account their thermophysical properties should be used to justify the …

Regulations Of Hydraulic Resistance Of Machine Channels Of Pumping Stations, D.R. Bazarov, B.R. Uralov, M.P. Tashkhanova

Irrigation and Melioration

The paper considers the general equation of fluid motion in the channels and the functional dependences of the hydraulic friction coefficient on the Reynolds number, relative roughness, and on the shape of the live section of the channel. Resistance formulas are given for the simplest cross-sectional shapes of channels and for channels with a more complex cross-sectional shape. To take into account the effect (on the pressure loss) of the channel cross-sectional shape and the presence of a flow with a free surface in it, additional correction factors are introduced (using the hydraulic radius concept) and be clarified as a …

Studying The Movement Of Crop Drined Seeds Of Cottage On A Slope Tray In A Protective Machine, R.K. Djamolov, A.A. Akrаmov, K. Djamolov

Irrigation and Melioration

The article presents the results of a theoretical study of the movement of pubescent cotton seeds along an inclined guide in a pickling machine. Equations are obtained that describe the movement of the seed along the inclined tray of the dresser. A formula is derived for determining the time of movement of the seed on an inclined one to the dressing agent. A plot of the change in the speed of the seed in the tray on the change in the angle of inclination and on the value of the movement of the seed. To increase the feed rate of …

Modernization Of Functions Of Management Of Land Use In The Conditions Of Innovative Economy, Sh.K. Narbaev

Irrigation and Melioration

Land use management, as a complex material-abstract system, is carried out through a number of its functions. The article provides an analysis of the functions of land management, improved the content of some functions and introduced additional new functions in the context of the development of an innovative economy. It is noted that improving the management system will increase the efficiency of land use, improve their environmental status, preserve landscape ecosystems based on the accelerated development of innovative activities. New land management functions are recommended: innovative land use development, territory development, land use technical support, remote study of land properties …

Combined Installation Photo Thermal Battery - Electric Water Heater To Provide Electricity And Water To Rural Households, R.A. Muminov, M.N. Tursunov, Х. Sabirov, U.R. Kholov, Т.Z. Аkhtamov, М. Eshmuradova

Irrigation and Melioration

The article presents the experimental results of the study of the parameters of a combined installation photo thermal battery – electric heater, used to provide electric energy and water to rural households. Photo thermal battery is made on the basis of photovoltaic batteries of crystalline silicon with an efficiency of ~ 20 %. Cellular polycarbonate was used as a heat sink. When creating the KU based on photo thermal battery EVN, modern efficient batteries, controllers, inverters and consumers of electric energy were used, and Ariston was chosen as the EVN. KU is adapted to climatic conditions, effectively and reliably provides …

Modeling The Movement Of A Heap In A Dielectric Sorting Device For Alfalfa Seeds, A. Lee, Z. Sharipov, M.N. Sattarov

Irrigation and Melioration

This article presents a theoretical study of modeling the movement of a mixture in a dielectric sorting plant for alfalfa seeds. Theoretical studies were carried out using the general laws of mechanics and mathematical modeling of alfalfa seeds, taking into account their physical and mechanical properties. The results of a theoretical study on modeling the detachment conditions of alfalfa seed heap particles and particle dynamics along the casing and pitched boards of a dielectric sorting device are presented. The differential equation with the initial conditions was solved by numerical methods of "Runge-Kutta-Felberg" with automatic step selection. The components of a …

Conceptual Approaches To Improve Quality Of The Process Of Preparation Energy Personnel For Agricultural Sector Of Economy, A. Radjabov

Irrigation and Melioration

The article highlights problems of training energy personnel for agricultural sector and conceptual, principle and practical approaches to their solution based on goals and objectives outlined in concept of development of higher education system in Uzbekistan until 2030 and Strategy for development of agriculture Republic of Uzbekistan for 2020 - 2030

About Improvement Of Support Of Innovative Activity Of Higher Education By The State, A.E. Norov

Irrigation and Melioration

This article provides information on regulatory acts in support of innovative activities in the field of higher education. It is also indicated that the fact that the scientific activities of universities are not organized based on the prospects for socio-economic development of regions, forecasting innovative development based on analysis and effectiveness of innovations, research results, commercialization of scientific developments, and the involvement of talented youth in research, is the reason for the lack of reliable integration of education, science and production. It is necessary to improve the internal system of competitions, programs and projects aimed at supporting the commercialization of …

Revolutionizing The Mechanical Engineering Undergraduate Curriculum, Shelby Ann Mcneilly, Krishna Pakala, Donald Plumlee

Mechanical and Biomedical Engineering Faculty Publications and Presentations

As the age of technological advancement and occupational opportunity continues to progress, companies must be constantly adjusting and transforming in order to accommodate industry demands. With these quickly developing requirements comes an expectation of employee experience and skill sets. For individuals seeking a career in mechanical engineering, moving forward with the tools necessary for success in this continuously evolving world begins with higher education. This paper is the first of a three-part series to report on the progress of Boise State University’s Mechanical and Biomedical Engineering Department’s mission to implement a revolutionized curriculum in their academic program. This paper will …

Embedding Computer Simulation Based Classroom Activities To Enhance The Learning Experience For Manufacturing Systems, Tzu-Liang Bill Tseng, Md Fashiar Rahman, Richard Chiou, Ivan Arturo Renteria-Marquez, Aditya Akundi, Amit J. Lopes, Jeevarathinam Senthilkumar

Manufacturing & Industrial Engineering Faculty Publications

In recent time, manufacturing environment are bracing higher end technologies to achieve high productivity, efficiency and effectiveness. Due to the adoption of the sophisticated technologies, the system is becoming very complex and stochastic. Moreover, the manufacturing system is interconnected among its different subsystems and components, which cannot be described only through the theoretical explanation. Here, computer simulation can be integrated to design and visualize the stochastic and complex system. This paper uses the advantage of simulation to describe a series classroom activity using SIMIO software, which are deployed in industrial systems simulation course in the University of Texas at El …

Senior Capstone Team Formation Based On Project Interest: Team Selection By Students Compared To Team Selection By Instructors, Peter Schuster, Lauren Anne Cooper, Eltahry Elghandour, Eileen W. Rossman, Sarah Harding, Brian P. Self

Mechanical Engineering

Assigning teams in large courses is logistically challenging and students are sometimes unhappy with their assigned team. This is exacerbated when the project work extends over multiple terms and teams have unique projects. Giving students some agency in team and project selection is one way to improve their project experience. This paper examines two key questions: (a) What is the best way to incorporate student interests into the team-forming process? (b) What impact does the team-forming process have on the student experience throughout the project?

We consider two different approaches to giving students agency in the team formation / project …

Privileging Learning Over Numbers: Developing An Alternative Student Assessment In Engineering, Eleazar Marquez, Samuel Garcia

Mechanical Engineering Faculty Publications

In this research study, a new model to assess student performance and academic learning in engineering disciplines is proposed with the intention of shifting a grade driven mentality into a learning-oriented mindset. The rational for this model of assessment is to disrupt normalized assessment practices in higher education, reframe student thinking regarding learning and acquisition of knowledge, and encourage students to engage in coursework in meaningful ways. Unfortunately, grades in higher education have become a primary focal point for many students as a means to secure internship opportunities, undergraduate research, post-graduation employment, and graduate school acceptance into desired institutions. The …

Quantifying The Environmental Impacts Of Cookstove Transitions A Societal Exergy Analysis Based Model Of Energy Consumption And Forest Stocks In Honduras, Noah Ver Beek, Elvin Vindel, Matthew K. Heun, Paul E. Brockway

University Faculty Publications and Creative Works

Unsustainable consumption of biofuels contributes to deforestation and climate change, while household air pollution from burning solid biofuels in homes results in millions of premature deaths globally every year. Honduras, like many low and medium Human Development Index countries, depends on primary solid biofuels for more than 30% of its primary energy supply (as of 2013). We conducted a societal exergy analysis and developed a forest stock model for Honduras for 1971–2013 and used the results to model an energy transition from traditional wood stoves to either improved efficiency wood cookstoves or modern fuel cookstoves (using Electricity or Liquefied petroleum …

Developing An Equivalent Solid Material Model For Bcc Lattice Cell Structures Involving Vertical And Horizontal Struts, Tahseen A. Alwattar, Ahsan Mian

Mechanical and Materials Engineering Faculty Publications

In this study, a body-centered cubic (BCC) lattice unit cell occupied inside a frame structure to create a so-called “InsideBCC” is considered. The equivalent quasi-isotropic properties required to describe the material behavior of the InsideBCC unit cell are equivalent Young’s modulus ( E e ) , equivalent shear modulus ( G e ) , and equivalent Poisson’s ratio ( ν e ) . The finite element analysis (FEA) based computational approach is used to simulate and calculate the mechanical responses of InsideBCC unit cell, which are the mechanical responses of the equivalent solid. Two separates finite element models are then …

Conversion Of Self-Contained Breathing Apparatus Mask To Open Source Powered Air-Purifying Particulate Respirator For Fire Fighter Covid-19 Response, Benjamin R. Hubbard, Joshua M. Pearce

Michigan Tech Publications, Part 1

To assist firefighters and other first responders to use their existing equipment for respiration during the COVID-19 pandemic without using single-use, low-supply, masks, this study outlines an open source kit to convert a 3M-manufactured Scott Safety self-contained breathing apparatus (SCBA) into a powered air-purifying particulate respirator (PAPR). The open source PAPR can be fabricated with a low-cost 3-D printer and widely available components for less than $150, replacing commercial conversion kits saving 85% or full-fledged proprietary PAPRs saving over 90%. The parametric designs allow for adaptation to other core components and can be custom fit specifically to fire-fighter equipment, including …

Hydrolastic Damping: A Change To The Modern Helmet, Mark Buesa, Ara Moosekian, Michael Simeon, Ian Watts

Mechanical Engineering Senior Theses

High rates of concussion in the NFL suggest that helmet technology is not satisfactory for the athletes, and soft foam padding has dominated the helmet industry since its inception. The team proposed that implementing a fluid-based hydrolastic suspension system in the helmet would reduce the risk of concussions at all levels of competition. After using COMSOL to successfully model fluid flow through the dampers and after physical testing on dampers filled with air and water lead to increased "time to stop" of an average of 240% when compared to traditional foam padding, the team concluded that the dampers showed promise …

Lstm-Based Anomaly Detection For Non-Linear Dynamical System, Yue Tan, Chungjing Hu, Kuan Zhang, Kan Zeng, Ethan A. Davis, Jae Sung Park

Department of Mechanical and Materials Engineering: Faculty Publications

Anomaly detection for non-linear dynamical system plays an important role in ensuring the system stability. However, it is usually complex and has to be solved by large-scale simulation which requires extensive computing resources. In this paper, we propose a novel anomaly detection scheme in non-linear dynamical system based on Long Short-Term Memory (LSTM) to capture complex temporal changes of the time sequence and make multi-step predictions. Specifically, we first present the framework of LSTM-based anomaly detection in non-linear dynamical system, including data preprocessing, multi-step prediction and anomaly detection. According to the prediction requirement, two types of training modes are explored …

Improving The Piezoelectric Properties Of Flexible Polymer-Nanoparticle Energy Harvesters, Muhammet Emin Cavusoglu

Theses and Dissertations

In this research, one of the widely used polymers, poly(vinylidene fluoride)(PVDF), was used to develop thin-film polymer energy harvesters. Dimethylformamide (DMF) and methyl ethyl ketone (MEK) were used to dissolve the PVDF powder. Four different (0%, 3%, 5%, and 7%) ZnO nanoparticle (NP) concentrations were used to enhance the electrical output of the thin-film energy harvesters. A sonication bath and additional MEK were used in dispersing the ZnO NPs to obtained uniform PVDF/ZnO NP solution. The electrode poling technique was used for dipole alignment to improve the electrical performance of the devices. The fabricated samples were tested using the tensile …

Thermal Conductivity Performance Of 2d Hbn/Mos 2/Hybrid Nanostructures Used On Natural And Synthetic Esters, Jaime Taha-Tijerina, Hélio Ribeiro, Karla Aviña, Juan Manuel Martínez, Anna Paula Godoy, Josué Marciano De Oliveira Cremonezzi, Milene Adriane Luciano, Marcos Antônio Gimenes Benega, Ricardo Jorge Espanhol Andrade, Guilhermino José Macedo Fechine

Manufacturing & Industrial Engineering Faculty Publications

In this paper, the thermal conductivity behavior of synthetic and natural esters reinforced with 2D nanostructures-single hexagonal boron nitride (h-BN), single molybdenum disulfide (MoS2), and hybrid h-BN/MOS2-were studied and compared to each other. As a basis for the synthesis of nanofluids, three biodegradable insulating lubricants were used: FR3TM and VG-100 were used as natural esters and MIDEL 7131 as a synthetic ester. Two-dimensional nanosheets of h-BN, MoS2, and their hybrid nanofillers (50/50 ratio percent) were incorporated into matrix lubricants without surfactants or additives. Nanofluids were prepared at 0.01, 0.05, 0.10, 0.15, and 0.25 weight percent of filler fraction. The experimental …

'Bici-Bomba' Pedal Powered Well Purification System, Matthew Kamimura, Devan Hollar, Ally Belica, Liam Scobey

Mechanical Engineering Senior Theses

This senior design project consists of designing and building a bike powered well pump that purifies water. The Guatemalan NGO Maya Pedal is the critical customer that requested this project, and will help facilitate implementing it in the San Andres community. The project addresses these main needs: providing an easier, faster way to retrieve water and to clean water to safe drinking levels. In addition to these primary needs, a major goal is having the project be scalable within the San Andres community. This means that all of the components are available in Guatemala at reasonable prices, it is durable …

Development Of Water Coning Control Design Metrics In Naturally Fractured Reservoirs, Samir Prasun

LSU Doctoral Dissertations

Naturally fractured reservoirs (NFRs) with bottom-water are known for their instant water breakthrough and severe water coning that reduces oil recovery. This is because water channels through the highly permeable fractures easily connecting the well to the aquifer bypassing the oil contained in the matrix. Remedial techniques such as producing below critical-oil rate, optimizing the well spacing and installing the downhole water sink (DWS)/ downhole water loop (DWL) technology, have already been successfully tested in single-porosity reservoirs (SPR). However, applicability of these techniques in NFRs are unknown since only a few studies have been performed on their feasibility in NFRs, …

Neptune: Marine Rov Retrofit And Shape Memory Alloy Water Sampler, Ben O'Brien, Sophia Cero, Artie Henderson, Garrett Nelson, Eleni Spirakis

Mechanical Engineering Senior Theses

The Robotics Systems Lab at Santa Clara University worked closely with Monterey Bay Aquarium Research Institute to design and modernize a safe, low-voltage remotely operated vehicle (ROV) and fabricate a shape memory alloy (SMA) triggered water sampler. The scope of this project was split into two parts. The first was to modernize an existing ROV frame and flotation device with low-cost, low-voltage components for depths up to 300ft. The second scope was to design and manufacture a 100ml water sampling system that was mostly mechanical. Due to the onset of COVID-19, the functionality and performance of the ROV was verified …

Sunny-Side Solutions: A Solar Powered Water Heating And Shower System, Adrienne Lee, Malonda Mcelwee, Jada Paddock, Jesus Reyes

Mechanical Engineering Senior Theses

Sunny-Side Solutions is a solar water heating and shower system designed for Naretu Academy in Narok, Kenya, to provide the academy's teachers a simple, reliable, and frugal method of receiving hot water for daily showers. After thorough research and testing, the final system's main components are ½ diameter, 54.9 m long irrigation piping solar collector, a 100 L insulated hot water tank, and a 67 W circulation pump. These components ensure that all water that enters the system will be able to achieve a final temperature of 38 °C and maintain this temperature until the teachers shower and drain the …

Graftthis: Modernizing Organic Farming, Brendan Gescher, Molly Jansky, Jack Margolis, Kaleb Pattawi

Mechanical Engineering Senior Theses

Traditional plant characteristic improvement techniques are accompanied by certain disadvantages. Most notably, it takes several seasons in order to breed for favorable characteristics such as crop yield and disease resistance via deliberate selection. In order to expedite this improvement process, grafting - a method in which two separate plants with individual, desirable qualities are physically combined, may be used.

This report explores the development of a regulated environment as a solution to many of the problems associated with the grafting of plants during their recovery stage. The grafting chamber model necessitates: (1) an ability to maintain the specific temperature, humidity …

Feasibility Of Electric Field Assisted Clogging Reduction In Cold Gas Spraying Nozzle, Hendric Tronsson

ENGS 88 Honors Thesis (AB Students)

The relatively novel cold spraying process expands its range of applications constantly. In order to continue this trend, this process still has various hurdles that need to be overcome such as clogging. Clogging within the cold gas spraying process causes porous coatings with less material properties and lower durability; a solution is needed in order to reduce the clogging and so expand the cold gas spraying applications. This study aimed to explore the feasibility of using an electric field to reduce clogging. To do so a simplified channel was used to simulate charged particle trajectory shifts under the influence of …

Numerical Method For Rapid Aerostructural Design And Optimization, Jeffrey D. Taylor, Douglas F. Hunsaker

Mechanical and Aerospace Engineering Student Publications and Presentations

During early phases of wing design, analytic and low-fidelity methods are often used to identify promising design concepts. In many cases, solutions obtained using these methods provide intuition about the design space that is not easily obtained using higher-fidelity methods. This is especially true for aerostructural design. However, many analytic and low-fidelity aerostructural solutions are limited in application to wings with specific planforms and weight distributions. Here, a numerical method for minimizing induced drag with structural constraints is presented that uses approximations that apply to wings with arbitrary planforms and weight distributions. The method is applied to the NASA Ikhana …

Faculty Perspectives On The Impact Of Virtual Office Hours In Engineering Courses, Brooke-Lynn Caprice Andrade, Krishna Pakala, Diana Bairaktarova, Douglas Hagemeier, Harish Subbaraman

Mechanical and Biomedical Engineering Faculty Publications and Presentations

Instructor-student interaction is an important element of a course design, but office hours can be challenging to attend based on students’ commitments. They have time and space limitations that prevent students from getting the help they need and often garner poor attendance. Virtual office hours can address issues related to low attendance and provide a low stakes environment where unhindered learning can happen. Virtual office hours are flexible, yield productive interactions, and all enrolled students can participate. This study reports on three engineering instructors’ perspectives on the efficacy of virtual office hours compared to the traditional face-to-face interactions with the …

Fsec Energy Research Center Strategic Plan (2020-2025) Executive Summary, Florida Solar Energy Center, James Fenton

FSEC Energy Research Center®

The Florida Legislature created the Florida Solar Energy Center (FSEC) in 1975 to support the growth and development of renewable energy. The year 2025 will mark the half-century mark for FSEC's service as the statewide energy research and education institute. In preparation for the next 50 years of dynamic energy developments, the FSEC Energy Research Center is undertaking a strategic planning and rebranding process.

Data Acquisition, Analysis, And Modeling Of Rotordynamic Systems, Michael P. Mullen

Master's Theses

Data acquisition systems for rotordynamic analysis and machine vibration were explored for the purpose of replacing the obsolete Bently Nevada ADRE 208 and ADRE for Windows system. These included the development of Matlab based custom data acquisition systems and a user interface. A model of an anisotropic rotor response undergoing transient speed was developed for the rapid prototyping and testing of data acquisition systems. Several methods for the measurement of amplitudes and phase in both the time domain and frequency domain were developed and compared. An alternate data acquisition method which is more inline with industry practices was created for …

Simulation Of Cu Precipitation In Fe-Cu Dilute Alloys With Cluster Mobility, Senlin Cui, Mahmood Mamivand, Dane Morgan

Mechanical and Biomedical Engineering Faculty Publications and Presentations

Cu-rich precipitates formation is associated with the precipitation hardening of Fe-Cu based steels and the embrittlement of reactor pressure vessel steels under neutron irradiation. The accurate modeling of the time evolution of Cu-rich precipitates is therefore of fundamental importance for the design of Fe-Cu based steels and the prediction of the irradiation induced shift of the ductile to brittle transition temperature of reactor pressure vessels. This work applies cluster dynamics with mobile Cu monomers and clusters to model Cu precipitation in dilute Fe-Cu alloys at several temperatures. Optimized model parameters can be used to simulate the mean radius, number density, …