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Articles 1 - 11 of 11
Full-Text Articles in Engineering
Human-Centered Data Visualizations And Web Layouts For Life-Cycle Assessment Design Guides, Jonathan Klein
Human-Centered Data Visualizations And Web Layouts For Life-Cycle Assessment Design Guides, Jonathan Klein
ENGS 86 Independent Projects (AB Students)
User tests with 30 Dartmouth Engineering and STEM undergraduates were performed to investigate preferences toward a set of data visualizations and web layouts showing life-cycle assessment data and corresponding uncertainty. The data was collected and synthesized from academic papers, corporate manufacturers, and self-generated using the LCA software Sustainable Minds. A variety of visualizations were produced to accurately and aesthetically represent the data graphically, and especially understand how non-technical audiences interact with different displays of uncertainty, which is a key component of data visualization that is lacking from most LCA design guides. Web layouts were produced to present key information about …
Group Iv Environmentally Benign, Inexpensive Semiconductor Nanomaterials For Solar Cells, Lisa Je
Group Iv Environmentally Benign, Inexpensive Semiconductor Nanomaterials For Solar Cells, Lisa Je
ENGS 86 Independent Projects (AB Students)
Modern solar cells are composed of silicon, cadmium tellurium, and copper indium gallium diselenide. While these materials are efficient, elements such as cadmium and indium are rare and expensive. To make this renewable energy source more inexpensive and sustainable, the Liu Optics lab is substituting expensive rare earth metals for more commonly found transition state metals. Work has been done to replace the solar cell layers composed of cadmium and gallium to replace them with glass, silicon, and/or thin films. Common metals such as germanium and tin are investigated and characterized to provide a platform for solar cell components.
Evaluating The Potential For Renewable Energy Technology At Us Ski Resorts, Tyler Farrell
Evaluating The Potential For Renewable Energy Technology At Us Ski Resorts, Tyler Farrell
ENGS 86 Independent Projects (AB Students)
The ski industry is one of the most at-risk industries as a result of climate change. Warming temperatures and decreasing snowfall are contributing to a decline in skier visitations, shorter seasons, and higher energy costs. Currently, only 3 of 478 ski resorts in the United States rely on 100% renewable energy sources. The intent of this paper is to understand what the issues and barriers are to renewable energy development at ski resorts, and what technologies are feasible and appropriate for this industry to develop. While the renewable energy industry faces many issues and barriers, the ski industry faces its …
Mascoma River Greenway Extension, Isalys Quiñones
Mascoma River Greenway Extension, Isalys Quiñones
ENGS 86 Independent Projects (AB Students)
In July of 2018, the Mascoma River Greenway (MRG), a 2.2-mile rail trail extending from Downtown Lebanon, NH to Glen Road in West Lebanon, NH, was completed with the help of the MRG Coalition, the Friends of the Northern Rail Trail, Lebanon Recreation and Parks, and members of the City of Lebanon. Initially, this trail was proposed to extend from Downtown Lebanon to Downtown West Lebanon and White River Junction (WRJ). With pushback from the State of New Hampshire to lease the City of Lebanon recreational usage to the New Hampshire State Department of Transportation (NHDOT) owned rail corridor, the …
Comparing Past Board Assembly Inemi Roadmaps To Technology Outcomes, Annaka Rose Balch
Comparing Past Board Assembly Inemi Roadmaps To Technology Outcomes, Annaka Rose Balch
ENGS 86 Independent Projects (AB Students)
This project compares past board assembly roadmaps with actual technological outcomes, examining the progression of predictions across seven significant aspects of board assembly covered in the 1994, 2002, 2007, 2013 and 2017 roadmaps: 1) Conversion Costs, 2) NPI Cycle Time, 3) Component Trends, 4) Solder Paste, 5) Bar Solder, 6) Wave Solder Flux and 7) Die Attach Adhesives. It should be noted that there are discrepancies between these roadmaps—from general outline to the many aspects of board assembly that are investigated. This project aims to bridge these discrepancies in a comprehensive fashion to better inform iNEMI and identify possible areas …
Soundboard: Planar Tracking For Instrument Control, Peter O'Sullivan
Soundboard: Planar Tracking For Instrument Control, Peter O'Sullivan
ENGS 86 Independent Projects (AB Students)
The Soundboard is the central component of Syrinx, a synthesizer instrument invented by Spencer Topel. A generated audio signal is transduced through the Soundboard, and by manually adjusting the positioning of its top metal plane, the user can manipulate the encased soundwaves before they are transduced back into a signal and output. My task for this project was to add controller functionality to the Soundboard component by implementing control voltages that carry information about its planar tilt, yaw, and altitude. These voltages can be used to modulate various digital parameters and further affect the sonic output of the instrument. Further, …
Functionalized Plasmonic Gold Nanorods On Chip For Circulating Tumor Dna Point Mutation Detection, George Cheng
Functionalized Plasmonic Gold Nanorods On Chip For Circulating Tumor Dna Point Mutation Detection, George Cheng
ENGS 86 Independent Projects (AB Students)
Nanosensors utilizing the phenomenon of localized surface plasmon resonance (LSPR) have been gaining in popularity due to improved sensitivity and wider dynamic range of optical sensors. Liquid biopsy is a minimally invasive method of analyzing disease dynamics and many technologies have been developed for research laboratory settings. However, there remains a need to simplify the workflow and expand these technologies into point-of-care clinical settings. Functionalized gold nanoparticles dispersed on-chip represent a promising solution to this problem and could also be easily multiplexed to detect many different biomarkers on a single-chip. We are focused on the KRAS G12V point mutation of …
Making Personal Goals More Achievable, Adam Carlson
Making Personal Goals More Achievable, Adam Carlson
ENGS 86 Independent Projects (AB Students)
Achieving long-term goals has a large impact on one’s life. However, this success requires focused, consistent work even when the achievement is not imminent. Presently, we turn to calendars and task management applications for help. But, these tools quickly become cluttered making it difficult to visualize progress. I created an iPhone application which emphasizes long-term thinking. First-time users must provide three long-term goals with deadlines. Then, they have the opportunity to add smaller, to-do items to their week. For each item, the user must specify a long-term goal to which it is associated. The long-term association ensures users stay focused.
Proposed Delivery And Return Water Temperatures For Dartmouth College Hot Water Network, Storm Mata
Proposed Delivery And Return Water Temperatures For Dartmouth College Hot Water Network, Storm Mata
ENGS 86 Independent Projects (AB Students)
This study aimed to verify the viability of the planned hot water heating network at Dartmouth, and determine the necessary hot water radiator areas needed to satisfy the empirically-determined heat demand for buildings on campus, using 5 year of steam con- sumption data. In order to verify viability, the pressure and temperature of the delivery steam and return condensate of the current heating network were used to find the amount of heat delivered per pound of steam to campus. The above-mentioned steam consump- tion data were then used to find the max heat demand for the past five years and …
Correcting Human Errors In Rock Climbing, Regina Yan
Correcting Human Errors In Rock Climbing, Regina Yan
ENGS 86 Independent Projects (AB Students)
In the sport of rock climbing, improper belay technique resulting from the belayer standing too far from the wall is a main source of accidents and injuries from lead climbing. This project aimed to correct human errors in lead belaying and climbing. The resulting product was the Belay Belt, a device that successfully measured the belayer’s distance from the wall and alerted the belayer when he or she exceeded a safe distance threshold.
Microfluidic Pcr On Gold Nanorods For Combined Screening And Detection Of Ctdna, Cathy Li
Microfluidic Pcr On Gold Nanorods For Combined Screening And Detection Of Ctdna, Cathy Li
ENGS 86 Independent Projects (AB Students)
Microfluidics and liquid biopsy on chip are growing in popularity as a method of detection and analysis used in point of care devices. The advantages of liquid biopsy include minimal invasiveness, low cost, shorter time from analysis to results, and less consumption of sample and reagents. Liquid biopsy has shown the ability to detect small concentrations of a biomarker of interest. However, some biomarkers, such as circulating tumor deoxyribose nucleic acid (DNA), exist in very small concentrations that make detection challenging. The integration of miniaturized polymerase chain reaction (PCR) with liquid biopsy techniques is a promising solution. Gold nanoparticles are …