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Articles 1 - 21 of 21
Full-Text Articles in Physical Sciences and Mathematics
Eyes On The Rise, Jennifer Fu, Susan Jacobson
A Machine Learning Approach To Post-Market Surveillance Of Medical Devices, Jonathan Bates, Shu-Xia Li, Craig Parzynski, Ronald Coifman, Harlan Krumholz, Joseph Ross
A Machine Learning Approach To Post-Market Surveillance Of Medical Devices, Jonathan Bates, Shu-Xia Li, Craig Parzynski, Ronald Coifman, Harlan Krumholz, Joseph Ross
Yale Day of Data
Post-market surveillance is a collection of processes and activities used by product manufacturers and regulators, such as the U.S. Food and Drug Administration (FDA) to monitor the safety and effectiveness of medical devices once they are available for use “on the market”. These activities are designed to generate information to identify poorly performing devices and other safety problems, accurately characterize real-world device performance and clinical outcomes, and facilitate the development of new devices, or new uses for existing devices. Typically, a device is monitored by comparing adverse events in the exposed population to a matched unexposed population. This research considers …
A High-Altitude Balloon Platform For Determining Regional Uptake Of Carbon Dioxide Over Agricultural Landscapes, Angela M. Bouche
A High-Altitude Balloon Platform For Determining Regional Uptake Of Carbon Dioxide Over Agricultural Landscapes, Angela M. Bouche
2017 Academic High Altitude Conference
Interactions between the biosphere and atmosphere are an important part of the global carbon cycle, and quantifying the carbon dioxide exchanges between them is helpful in predicting the uptake of carbon dioxide from anthropogenic sources by the biosphere in the future. In the Midwestern United States, agricultural systems cover a large part of the landscape, so understanding their role in influencing the global carbon budget is crucial as anthropogenic sources of carbon dioxide grow larger. Carbon dioxide exchanges can be measured by eddy covariance at the ecosystem level (bottom-up approach) or regionally by inversion techniques (top-down approach). Here we describe …
Building An Undergraduate Cohort In High Altitude Ballooning, Mike Davis
Building An Undergraduate Cohort In High Altitude Ballooning, Mike Davis
2017 Academic High Altitude Conference
City Colleges of Chicago (CCC), in partnership with DePaul University and the Illinois Space Grant Consortium, has recently been awarded a grant from NASA to develop a research and education program in high-altitude ballooning. The project builds on the Chicago Initiative for Research and Recruitment in the Undergraduate Sciences (CIRRUS) model of undergraduate research and community college/four year college collaborative projects, a successful NSF-funded collaboration between DePaul and CCC. The project has four goals: (1) initiate a year-round undergraduate research program to recruit promising community college students into the STEM disciplines, (2) provide tuition support and fellowships to support student …
Nasa Nebraska High Altitude Ballooning And The Fab Lab, Kendra Sibbernsen, Michael Sibbernsen
Nasa Nebraska High Altitude Ballooning And The Fab Lab, Kendra Sibbernsen, Michael Sibbernsen
2017 Academic High Altitude Conference
The NASA Nebraska High Altitude Ballooning (N-NHAB) program has collaborated on projects with the Fab Lab at Metropolitan Community College (MCC) in Omaha, NE. Based on the MIT Center for Bits and Atoms, the Fab Lab contains 3D printers, laser cutters, CNC machines, and much more. In its trial phase, the Fab Lab encouraged projects from the sciences. In response to this request, one of these projects involved a HAB student who wanted to streamline custom circuitry for measuring the efficiency of solar cells. The circuit pathways were designed and precisely cut from a copper sheet and the laser cutter …
Who Are You? ...Honestly!, Zeinab Mahdavifar
Who Are You? ...Honestly!, Zeinab Mahdavifar
TAC Talks
Online social media has made life easier in many ways. Stay in touch with old classmates (Facebook), find a way to connect to like-minded professionals all over the globe (LinkedIn), and even seek help from fellow humans we could never imagine otherwise to help us (Mechanical Turk)! Social network profiles are never complete. Ascertaining personality traits and accurate determination of age and gender can make such social networks safer and stronger instruments of true collaboration and human connection.
In my talk, I will discuss the predictive models we built with the Social Media group within the Center for Data Science …
Private Predictive Modeling Power, Stacey C. Newman
Private Predictive Modeling Power, Stacey C. Newman
TAC Talks
The predictive potential of the many large datasets being held in healthcare, financial markets, social media, etc. by separate entities is locked behind privacy constraints. These separate entities either cannot share their data with one another or it is against their interests to do so. The ability to produce powerful predictive models that leverage knowledge from these different data sources is restrained by an inability to do so without revealing the data.
In my talk, I will outline our proposed protocol in which two different entities can build one of the most popular machine learning modules, a linear regression model …
Org Or Inorg? Atmospheric Carbon Controls That Initiated The Late Paleozoic Ice Age 326mya, Paco Defrancis
Org Or Inorg? Atmospheric Carbon Controls That Initiated The Late Paleozoic Ice Age 326mya, Paco Defrancis
CLAS: Colby Liberal Arts Symposium
The Late Paleozoic Ice Age (LPIA) was a major global icehouse that initiated in the Mississippian (326 million years ago; ma) and lasted through the Early Permian (267ma). An ice sheet nucleated in southern Gondwana near the South Pole, which either paleogeography (positioning of paleocontinents) or atmospheric concentration of the greenhouse gas CO2 controlled. In this paper I accept recent findings that prove atmospheric pCO2 and not paleogeography forced global cooling that resulted in the nucleation of Gondwanan ice sheets that defined the LPIA. There remains no broad consensus of what caused pCO2 lowering in the Mississippian. Organic carbon found …
Exploring Computer Graphics: Photorealistic And Non-Photorealistic Rendering, Brittany Chin
Exploring Computer Graphics: Photorealistic And Non-Photorealistic Rendering, Brittany Chin
CLAS: Colby Liberal Arts Symposium
Over the course of the year, the Advanced Computer Graphics course has explored a variety of image rendering techniques starting with the basic filling of polygons, and working all the way up to non-photorealistic rendering techniques. I have implemented a variety of these techniques in projects which demonstrate the growth and advancements of graphics over time. The implementations that are featured are an interactive tile game, a curve editor, a ray-tracer, and a non-photorealistic project. The capabilities of computer graphics are seemingly endless, and it is getting easier and easier to model the real world in synthetic systems. Where will …
Graphics, Beatrice Liang
Graphics, Beatrice Liang
CLAS: Colby Liberal Arts Symposium
Here I show images generating using computer graphics methods ranging from green screen images to 3D models
3d Model Generation From Flat Images And Other Pretty Pictures, Matthew Levine
3d Model Generation From Flat Images And Other Pretty Pictures, Matthew Levine
CLAS: Colby Liberal Arts Symposium
We present a novel method of generating 3D models from 2D images using neural network techniques. We also show a custom implementation of a global illumination model natively integrated into Python's standard 2D image library (with a fast C backend).
Trees And Non-Photorealistic Images, Christopher Burnham
Trees And Non-Photorealistic Images, Christopher Burnham
CLAS: Colby Liberal Arts Symposium
Showing of a graphics system with some trees and non-photorealistic images.
A Look Into Graphics Engines And Non-Photorealistic Rendering, Margaux Leblanc
A Look Into Graphics Engines And Non-Photorealistic Rendering, Margaux Leblanc
CLAS: Colby Liberal Arts Symposium
Throughout the year I have created a graphics pipeline that can render both photorealistic and non-photorealistic images. It all starts with defining what a pixel is and building from there. For instance, an image is a collection of pixels, a color is just three numbers (red, green, and blue values), a line is coloring certain pixels with such a color based on Bresenham's line algorithm and so on. My graphics engine can draw and shade points, lines, polylines, and polygons according to different algorithms. Using these basic shapes I can create photorealistic images of L-systems and non-photorealistic images of paintbrush …
Computer Graphics Presentation, Itrat Akhter
Computer Graphics Presentation, Itrat Akhter
CLAS: Colby Liberal Arts Symposium
The aim of this poster presentation is to display the works that I did over two semester of computer graphics classes. As such, I will give a brief glimpse of the methods and images involving fractals, bezier curves and surfaces, hierarchical modeling, shading and lighting, particle systems and others.
Investigations Of Synthetic Fuels: S8 And Sasol Ipk To Determine The Possibility Of Alternate Fuels In The Aerospace Industry, Scott M. Dyke
Investigations Of Synthetic Fuels: S8 And Sasol Ipk To Determine The Possibility Of Alternate Fuels In The Aerospace Industry, Scott M. Dyke
GS4 Georgia Southern Student Scholars Symposium
Investigations of Synthetic Fuels: S8 and Sasol IPK to Determine the Possibility of Operation as Alternate Fuels in the Aerospace Industry
Name: Scott Dyke
Co-Authors: Martin Muinos, Julia Heimberger, Dr. Valentin Soloiu,
An ever-growing society that becomes more and more dependent on a finite energy source will eventually exceed its supply. Fossil fuel quantities are continuously decreasing and new solutions are needed. According to the United States Department of Transportation, over 10 billion gallons of airline fuels have been consumed in each of the past 15 years with some years over 13 billion gallons. In the meantime, fuel costs have …
Modeling Traffic At An Intersection, Kaleigh L. Mulkey, Saniita K. Fasenntao
Modeling Traffic At An Intersection, Kaleigh L. Mulkey, Saniita K. Fasenntao
Symposium of Student Scholars
The main purpose of this project is to build a mathematical model for traffic at a busy intersection. We use elements of Queueing Theory to build our model: the vehicles driving into the intersection are the “arrival process” and the stop light in the intersection is the “server.”
We collected traffic data on the number of vehicles arriving to the intersection, the duration of green and red lights, and the number of vehicles going through the intersection during a green light. We built a SAS macro code to simulate traffic based on parameters derived from the data.
In our program …
Microfluidic Generator Of Sub-10-Micron Hydrosomes, Zhenghao Ding, Lunjun Liu, Gabriel C. Spalding, Faculty Advisor
Microfluidic Generator Of Sub-10-Micron Hydrosomes, Zhenghao Ding, Lunjun Liu, Gabriel C. Spalding, Faculty Advisor
John Wesley Powell Student Research Conference
Known as the fundamental “lab on a chip” technology, microfluidics is a thriving young research area that first took off in the 1990s. It is commonly used for reducing the amount of material required for biochemical analysis, such DNA sequencing. Its narrow tunnels can annihilate turbulence even in high-speed fluid flow, facilitating controlled, systematic processing. Also, by leveraging lithographic techniques developed for the semiconductor industry, enormous capability can be integrated into a single microfluidic chip. We have thus far utilized templates designed and fabricated by previous students in our lab, for fabrication of a series of microfluidic chips, made of …
Assembly, Alignment, And Maintenance Of An Automated Laser Cutter, Zhenghao Ding, Lunjun Liu, Gabriel C. Spalding, Faculty Advisor
Assembly, Alignment, And Maintenance Of An Automated Laser Cutter, Zhenghao Ding, Lunjun Liu, Gabriel C. Spalding, Faculty Advisor
John Wesley Powell Student Research Conference
We have assembled a kit for an automated laser cutter system, intended to play an important role in a wide variety of student-led design projects on our campus. We began by electrically soldering the wiring for a powerful (60 Watt), pulsed infrared (10.6µm wavelength) CO2 laser beam, which can thermally induce shock waves that locally ablate a wide range of (non-reflective) materials. The laser tube itself generates significant heat when operating, so we also assembled the required water-cooling system. Given the high powers involved, careful alignment this invisible laser was required, to ensure that the beam is safely contained …
A New Laboratory For Mm-/Sub-Mm-Wave Characterization Of Cosmic Dust Analogs, Lunjun Liu, Thushara Perera, Faculty Advisor
A New Laboratory For Mm-/Sub-Mm-Wave Characterization Of Cosmic Dust Analogs, Lunjun Liu, Thushara Perera, Faculty Advisor
John Wesley Powell Student Research Conference
At visible wavelengths, cosmic dust obscures many interesting astronomical environments such as stellar nurseries and new planetary systems. Studying how light interacts with cosmic dust would help reveal the nature of the objects and environments that are obscured by dust. In order to study the optical properties of cosmic dust analogs in the lab, we constructed a custom apparatus, which consists of a vacuum chamber, a cooling mechanism to vary the temperature of dusts in an astronomically interesting range (7-50 Kelvin), and a long-wavelength spectrometer. Since completing the construction of the custom apparatus, we are currently assembling and testing the …
How The University Of California Runs One Repository For Ten Campuses, Katie Fortney
How The University Of California Runs One Repository For Ten Campuses, Katie Fortney
Inaugural CSU IR Conference, 2015
Katie Fortney, JD, MLIS, Copyright Policy & Education Officer, Office of Scholarly Communication, University of California http://osc.universityofcalifornia.edu/
Implementing Metaarchive And Lockss At Digital Commons @Cal Poly, Michele Wyngard
Implementing Metaarchive And Lockss At Digital Commons @Cal Poly, Michele Wyngard
Inaugural CSU IR Conference, 2015
Michele Wyngard, Digital Repository Coordinator, CSU Cal Poly