Engineering Commons^™

Engineering Model To Calculate Mass Flow Rate Of A Two-Phase Saturated Fluid Through An Injector Orifice, Brian J. Solomon

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

An engineering model is developed to calculate mass flow rate of nitrous oxide, a self-pressurizing saturated oxidizer commonly used in hybrid rocket motors. While use of N_{2}0 cannot be accurately modeled using traditional ideal gas, compressible, or incompressible flow assumptions. To obtain accurate mass flow rate this one-dimensional analysis includes both incompressible fluid and homogeneous equilibrium mass flow rate models. Mass flow calculations from the two models are independently weighted and summed to obtain representative two-phase mass flow rate. Fluid properties are iterated in time by keeping track of fluid enthalpy and are propagated across the injector using either isentropic …

Concept Tests For A New Wire Flying Vehicle Designed To Achieve High Horizontal Resolution Profiling In Deep Water, Chris Roman, Dave Hebert

Graduate School of Oceanography Faculty Publications

Efficiently profiling the water column to achieve both high vertical and horizontal resolution from a moving vessel in deep water is difficult. Current solutions, such as CTD tow-yos, moving vessel profilers, and undulating tow bodies, are limited by ship speed or water depth. As a consequence, it is difficult to obtain oceanographic sections with sufficient resolution to identify many relevant scales over the deeper sections of the water column. This paper presents a new concept for a profiling vehicle that slides up and down a towed wire in a controlled manner using the lift created by wing foils. The wings …

Bs News November/December

Building Services Engineering

No abstract provided.

2011 Fall Engr333 Project Assignment, Matthew K. Heun

ENGR 333

The Fall 2011 ENGR333 project focused on the Bunker Interpretive Center (BIC) at Calvin University.

I asked the students “What would it take for Calvin College to obtain an Energy Star rating for the BIC? Or, if the BIC already qualifies for an Energy Star rating, what would it take to improve the energy efficiency of the BIC (as measured by Energy Star metrics) by 15%, thereby ensuring Energy Star performance of the building into the future?”

Customer

As I recall, the customer for this project was Biology faculty member Randy Van Dragt.

Bs News September/October

Building Services Engineering

No abstract provided.

Pointer States Via Engineered Dissipation, Kaveh Khodjasteh, Viatcheslav V. V. Dobrovitski, Lorenza Viola

Dartmouth Scholarship

Pointer states are long-lasting high-fidelity states in open quantum systems. We show how any pure state in a non-Markovian open quantum system can be made to behave as a pointer state by suitably engineering the coupling to the environment via open-loop periodic control. Engineered pointer states are constructed as approximate fixed points of the controlled open-system dynamics, in such a way that they are guaranteed to survive over a long time with a fidelity determined by the relative precision with which the dynamics is engineered. We provide quantitative minimum-fidelity bounds by identifying symmetry and ergodicity conditions that the decoherence-inducing perturbation …

Automation Of Orthodontic Wire Tester For Performing Three Point Bending Tests, Adithya Venkatesan

Master's Theses

Abstract

Understanding the biomechanical factors in orthodontics is important in order to improve the overall effectiveness of actual clinical treatment. An accurate method to study the threedimensional (3D) force systems and the resulting movements of teeth during orthodontic treatment is needed along with the understanding of the material properties of any orthodontic wire. Until recently, most of the orthodontic biomechanics literature was limited to twodimensional experimental studies. Recent advances in threedimensional computer modeling have also been developed but have been limited to the manual control of tooth movement. Overall, there is very little published evidence in the literature on the …

Thermoelectric Power Factor Of In2O3:Pd Nanocomposite Films., Otto J. Gregory, Matin Amani, Gustave C. Fralick

Chemical, Biomolecular, and Materials Engineering Faculty Publications

A nanocomposite exhibiting large thermoelectric powers and capable of operating at temperatures as high as 1100 °C in air was fabricated by embedding palladium nanoparticles into an indium oxide matrix via co-sputtering from metal and ceramic targets. Combinatorial chemistry techniques were used to systematically investigate the effect of palladium content in these nanocomposite films on thermoelectric response. Based on these rapid screening experiments, the thermoelectric properties of the most promising nanocomposites were evaluated as a function of post-deposition heat treatment at high temperatures. An n-type nanocomposite film was developed exhibiting a power factor of 4.5 x 10^-4 W/m·K^{2 …}

Bs News July/August

Building Services Engineering

No abstract provided.

An Investigation Of The Perception Of Gains From Undergraduate International Exchange Programs: The Tale Of Atlantis, Donal Mchale, Gul Okudan Kremer, Michael Dyrenfurth, Brian Bowe

Conference Papers

In this paper, we provide the quantitative results collected through a two-column survey instrument with which students recorded their perceptions of their educational experiences, and then summarize the qualitative study findings to outline the benefits of being immersed in different educational settings through study abroad experiences. Given the current resource constraint environment in higher education settings, we hope to help our community in making better decisions relevant to developing and sustaining study abroad programs

An Interdisciplinary Team-Based Mobile Robots Design Course For Engineering, Fernando Rios-Gutierrez, Rocio Alba-Flores

Electrical & Computer Engineering: Faculty Publications

An Interdisciplinary, Team-Based Mobile Robots Design Course for Engineering TechnologyAbstractThis work describes the educational experience gained during a new course in mobile robotics, a fourthyear elective course in the undergraduate Electrical Engineering Technology program at our University.The main topic of this course is concentrated on team-based, one semester-long robotics projects in whichstudents design and build mobile robots for different applications. A mobile robot is a system that contains mechanical and electronic parts that can be programmed toperform some specific functions, responding to sensory inputs under the control of an internal or externalcomputer. The reasons to use mobile robots as the …

Qualitative Research In Engineering Education, Kevin Kelly, Brian Bowe

Conference papers

No abstract provided.

Thermodynamic Based Model Eliciting Activities For Undergraduate Mechanical Engineering Education, Paul Nicholas Van Bloemen Waanders

Master's Theses

Undergraduate engineering education is designed to prepare students for their careers.  The rise of technology in modern engineering allows for a shift in the way undergraduates are prepared for the modern workplace.  Model Eliciting Activities (MEAs) allow students to think critically about their own work and allow instructors to analyze the students’ problem solving methods.  To ensure that new MEAs are as effective as possible they are subject to six basic principles: model construction, reality, generalizability, self-assessment, model documentation, and effective prototype.

This document focuses on evaluating new MEAs for their adherence to the six principles from an instructor's and …

Asynchronous Use Of Engineering (Materials) Education Videos, Craig Johnson, Arthur D. Morken

All Faculty Scholarship for the College of the Sciences

Engineering education delivery is dynamic and increasingly asynchronous. An observation that students had very different levels of knowledge and skills as they progressed through our programs, led the authors to use audio/visual media as a leveling intervention. In this effort the authors collected data to determine if audio/visual media can be used to increase performance in the development of a program related task and guide students to higher levels of learning on Blooms Taxonomy through the development of student created learning aids.

One specific need was reflected in the disparate skills of our majority component of ‘transfer’ students in our …

Recording Of Elevated Temperature Fatigue Crack Growth Data By Dcpd System, N. Ramachandran, N. Arakere, Tarun Goswami

Biomedical, Industrial & Human Factors Engineering Faculty Publications

The growth of "long" fatigue cracks, in α-β titanium alloy forging, subjected to cyclic stresses, is studied in this paper. The fatigue crack growth rate (FCGR) data were recorded at room temperature, 350, 450, 550 and 650°F using the Direct Current Potential Difference (DCPD) technique. The DCPD method, used in this investigation, was found to record and correlate the potential difference in terms of crack growth rate (da/dN) and Mode I stress intensity factor range satisfactorily. Various factors related to error minimization and calibration equations for compact tension specimens have been elaborated. Also discussed were the means to enhance the …

Statistical Analysis When The Data Is An Image: Eliciting Student Thinking About Sampling And Variability., Margaret A. Hjalmarson, Tamara J. Moore, Robert Delmas

School of Engineering Education Faculty Publications

Results of analysis of responses to a first-year undergraduate engineering activity are presented. Teams of students were asked to develop a procedure for quantifying the roughness of a surface at the nanoscale, which is typical of problems in Materials Engineering where qualities of a material need to be quantified. Thirty-five teams were selected from a large engineering course for analysis of their responses. The results indicate that engagement in the task naturally led teams to design a sampling plan, use or design measures of center and variability, and integrate those measures into a model to solve the stated problem. Team …

Bs News May/June

Building Services Engineering

No abstract provided.

Development Of High Resolution Sea Floor Mapping Tools And Techniques, Gabrielle Inglis, J. Ian Vaughn, Clara Smart, Christopher N. Roman

Graduate School of Oceanography Faculty Publications

There is a persistent need for high resolution photographic and bathymetric maps of the sea floor for many research areas in marine geology, biology and archaeology. This poster will present recent work using high frequency multibeam sonars, stereo vision and structured light laser imaging techniques to create maps with centimeter resolution for these applications. This research involves the development of new image and sonar processing techniques that combat the typical difficulties of imperfect navigation information, limited sensor ranges and adverse environmental conditions associated with using marine robotic vehicles in the ocean. Data for this work has been collected with the …

Coherent-State Transfer Via Highly Mixed Quantum Spin Chains, Paola Cappellaro, Lorenza Viola, Chandrasekhar Ramanathan

Dartmouth Scholarship

Spin chains have been proposed as quantum wires in many quantum-information processing architectures. Coherent transmission of quantum information in spin chains over short distances is enabled by their internal dynamics, which drives the transport of single-spin excitations in perfectly polarized chains. Given the practical challenge of preparing the chain in a pure state, we propose to use a chain that is initially in the maximally mixed state. We compare the transport properties of pure and mixed-state chains and find similarities that enable the experimental study of pure-state transfer via mixed-state chains. We also demonstrate protocols for the perfect transfer of …

Exploration Of The Anaximander Mud Volcanoes, Timothy M. Shank, Santiago Herrera, Walter Cho, Christopher N. Roman, Katherine L. Croff Bell

Graduate School of Oceanography Faculty Publications

No abstract provided.

Landscape Imaging Of The Southeast Aegean Sea, Michael L. Brennan, Tufan Turanli, Bridget Buxton, Katherine L. Croff Bell, Christopher N. Roman, Meko Kofahl, Orkan Koyagasioglu, Daniel Whitesell, Thomas Chamberlain, Richard Sullivan, Robert Ballard

Graduate School of Oceanography Faculty Publications

No abstract provided.

Bs News March/April

Building Services Engineering

No abstract provided.

Development Of High-Resolution Underwater Mapping Techniques, Christopher N. Roman, Gabrielle Inglis, J. Ian Vaughn, Stefan Williams, Oscar Pizarro, Ariell Friedman, Daniel Steinberg

Graduate School of Oceanography Faculty Publications

No abstract provided.

Exploration Of The Kolumbo Volcanic Rift Zone, Steven Carey, Katherine L. Croff Bell, Paraskevi Nomikou, Georges Vougioukalakis, Christopher N. Roman, Kathleen Cantner, Konstantina Bejelou, Maria Bourbouli, Julie Fero Martin

Graduate School of Oceanography Faculty Publications

No abstract provided.

The Rock 2011, School Of Engineering And Computer Science

The Rock

No abstract provided.

The Role Of Conflict Management On Virtual Team Performance And Satisfaction, Pilar Pazos, Anil Ustun, Rolando Delaguila

Engineering Management & Systems Engineering Faculty Publications

The role that input factors from project planning processes play on conflict emergence and conflict resolution in virtual teams is not well understood. Of particular interest for this paper is the role that factors during planning stages play in preventing interpersonal conflict, supporting conflict resolution and ultimately enhancing team outcomes in virtual team settings. This study examines the relationships among commitment to team goals, conflict management and team outcomes in virtual teams. First we provide an in depth review of relevant empirical findings. Next, we describe a study examining the relationships between three sets of variables: 1) goal commitment, 2) …

Hydration Repulsion Effects Of The Formation Of Supported Lipid Bylayers, Selver Ahmed, Rajesh Raman Madathingal, Stephanie L. Wunder, Yanjing Chen, Geoffrey D. Bothun

Chemical, Biomolecular, and Materials Engineering Faculty Publications

When zwitterionic lipids fuse onto substrates such as silica (SiO₂), the water of hydration between the two approaching surfaces must be removed, giving rise to an effective hydration repulsion. Removal of water around the polar headgroups of the lipid and the silanols (SiOH) of SiO₂ allows supported lipid bilayer (SLB) formation, although an interstitial water layer remains between the lipid and surface. The importance of hydration repulsion in SLB formation is demonstrated by monitoring fusion of zwitterionic lipids onto silica (SiO2) nanoparticles heat treated to control the silanol group (SiOH) density and thus the amount of bound …

Electimize A New Evolutionary Algorithm For Optimization With Applications In Construction Engineering, Raheem, Mohamed Abdel

Electronic Theses and Dissertations

Optimization is considered an essential step in reinforcing the efficiency of performance and economic feasibility of construction projects. In the past few decades, evolutionary algorithms (EAs) have been widely utilized to solve various types of construction-related optimization problems due to their efficiency in finding good solutions in relatively short time periods. However, in many cases, these existing evolutionary algorithms failed to identify the optimal solution to several optimization problems. As such, it is deemed necessary to develop new approaches in order to help identify better-quality solutions. This doctoral research presents the development of a new evolutionary algorithm, named “Electimize,” that …

Successful Engineering And Technology Student Mobility: Key Student Perspectives And Quality Determinants Before, During And After Student Exchange Under The Atlantis Programme, Mike Murphy, Donal Mchale, Michael Dyrenfurth, James Barnes

Articles

The EU-US Agreement through the Atlantis Programmes supports consortia of higher education and training institutions working together at undergraduate or graduate level to improve their educational services, to compare and modernise curricula and to develop joint study programmes with full recognition of credits and qualifications. The EU-US Atlantis Programme funds innovative projects across three strands: mobility projects, double or joint “transatlantic degrees” for students in the EU and US and policy-oriented measures. The main focus of activities must be on transatlantic rather than intra-European or intra-American interactions. Funded activities, such as the development of curricula, joint study programmes, exchanges and …

Critical Issues And Lessons Learned In Establishing Concurrent International Ms Degree Programs In Engineering Technology, Mike Murphy, Michael Dyrenfurth, Gary Bertoline, Robert Herrick, Kathryne Newton, Sancho Maria-Ribera, Nuria Castell, James Barnes, Matthias Kuder, Gareth O'Donnell

Articles

Globalization, competitiveness, and innovation are frequently employed themes as governments, business and industry and universities attempt to respond to the challenges facing them. Clearly business as usual is not likely to be successful in the future. One strategic response for universities has been a significant impetus – in many parts of the world – towards dual, joint or concurrent degree programs involving international partners. It is perhaps not surprising that engineering is among the disciplines that make most use of international collaboration but it seems that engineering technology programs do not yet participate as extensively in this aspect of international …