Physical Sciences and Mathematics Commons^™

Inheritance Details In Scala, Raffi T. Khatchadourian

Open Educational Resources

No abstract provided.

Technology Belmont Data, Christopher Monz, Vera Hausner, Jennifer Schmidt

Browse all Datasets

The data is based on semi-structured household interviews conducted in Noatak (n = 12), Noorvik (n = 11), and Brevig Mission (n = 12) in the March of 2017. Information gathered consists of individuals use of technology, perceptions about how technology has helped or hindered their ability to do subsistence and address the changing climate, and the role of technology in the community. Demographic information includes gender, race, education, household size, and employment status. Individuals who were particularly knowledgeable and amendable participated in a q-sort exercise to assess values and beliefs regarding technology in their community. Individual records are confidential …

Changes In Water Vapor Adsorption And Water Film Thickness In Clayey Materials As A Function Of Relative Humidity, Qinhong Hu

Earth & Environmental Sciences Datasets

Soil water, with adsorbed water being an important component, plays an important role in fluid flow and chemical movement in the unsaturated zone. The adsorbed water consists of water film and interlayer water, and its content is related to the relative humidity (RH). This study theoretically and experimentally focuses on the variation in adsorbed water content in clayey materials as the RH changes. Based on a slit-pore model, three types of water (water film, interlayer water, and capillary water) could be present in the water vapor adsorption process. The variation of water film is obtained from the analysis of interfacial …

Yellowstone National Park - Feat Snowmobile Measurements, University Of Denver

Non-Road Vehicle Data

Relevant Publications

Environmental Science & Technology Publication (1999)

Environmental Science & Technology Publication (2001)

Environmental Science & Technology Publication (2005)

1998 Final Report

1999 Final Report

2005 Final Report

Yellowstone National Park - Pems Snowcoach Measurements, University Of Denver

Non-Road Vehicle Data

Relevant Publications

Environmental Science & Technology Publication (2006)

Air & Waste Management Publication (2009)

Environmental Science & Technology Publication (2014)

2005 Final Report

2006 Final Report

2012 Final Report

An Empirical Study Of Refactorings And Technical Debt In Machine Learning Systems, Yiming Tang, Raffi T. Khatchadourian, Mehdi Bagherzadeh, Rhia Singh, Ajani Stewart, Anita Raja

Publications and Research

Machine Learning (ML), including Deep Learning (DL), systems, i.e., those with ML capabilities, are pervasive in today's data-driven society. Such systems are complex; they are comprised of ML models and many subsystems that support learning processes. As with other complex systems, ML systems are prone to classic technical debt issues, especially when such systems are long-lived, but they also exhibit debt specific to these systems. Unfortunately, there is a gap of knowledge in how ML systems actually evolve and are maintained. In this paper, we fill this gap by studying refactorings, i.e., source-to-source semantics-preserving program transformations, performed in real-world, open-source …

Determining How Increasing Precipitation Intensity Will Impact Rangelands In Utah., Karen H. Beard, Andrew Kulmatiski

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As the atmosphere warms, precipitation events become larger, but less frequent. Yet, there is fundamental disagreement about how increased precipitation intensity will affect vegetation. Walter’s two-layer hypothesis and experiments testing it have demonstrated that precipitation intensity can increase woody plant growth. Observational studies have found the opposite pattern. Not only are the patterns contradictory, but inference is largely limited to grasslands and savannas. We tested the effects of increased precipitation intensity in a shrub-steppe ecosystem that receives >30% of its precipitation as snow. We used 11 (8 m x 8 m) shelters to collect and redeposit rain and snow as …

Olivine, Scott Brande

RockDoc - 3D Rock Models

Courtesy of EDUROCK

Galena, Scott Brande

RockDoc - 3D Rock Models

Courtesy of Prof. Dexter Perkins

200-30, Scott Brande

RockDoc - 3D Rock Models

Model created by Dr. Scott Brande

Hornblende, Scott Brande

RockDoc - 3D Rock Models

Courtesy of Sara Carena

Sulfur, Scott Brande

RockDoc - 3D Rock Models

Sulfur model from Prof. Dexter Perkins

Plagioclase, Scott Brande

RockDoc - 3D Rock Models

Courtesy of Prof. Dexter Perkins

A Pulse-Decay Method For Low Permeability Analyses Of Granular Porous Media: Mathematical Solutions And Experimental Methodologies, Quinhong Hu

Earth & Environmental Sciences Datasets

This dataset is for a manuscript titled "A pulse-decay method for low permeability analyses of granular porous media: Mathematical solutions and experimental methodologies" being reviewed by Water Resources Research, a journal of American Geophysical Union and Wiley (2020-07-29)

Switzerland - Canton Of Uri 1998, University Of Denver

FEAT Heavy-Duty Vehicle Measurements

Relevant Publications

Environmental Science & Technology Publication

Colorado - Coors Brewery, University Of Denver

FEAT Heavy-Duty Vehicle Measurements

Relevant Publications

Environmental Science & Technology Publication (2001)

Environmental Science & Technology Publication (2006)

Thesis

Colorado - Dumont Weigh Station, University Of Denver

FEAT Heavy-Duty Vehicle Measurements

Relevant Publications

Environmental Science & Technology Publication (2001)

Environmental Science & Technology Publication (2006)

Thesis

Texas - Port Of Houston 2009, University Of Denver

FEAT Heavy-Duty Vehicle Measurements

Relevant Publications

Thesis

California - Peralta Weigh Station, University Of Denver

FEAT Heavy-Duty Vehicle Measurements

Relevant Publications

Environmental Science & Technology Publication (2001)

Environmental Science & Technology Publication (2012)

Environmental Science & Technology Publication (2013)

Environmental Science & Technology Publication (2018)

Air & Waste Management Journal (2021)

2008 Final Report

2009 Final Report

2010 Final Report

2012 Final Report

2017 Final Report

Studying The Oxygen Effect In Proton Therapy Via Gpu-Based Microscopic Monte Carlo Simulation, Marcos Joseph Guillen

Physics Theses

Dissolved oxygen molecules are known to play an important role in radiotherapy. For example, tumor cells can be more radio-resistance under hypoxia than normoxia. There has been multiple hypothesis proposed to explain these phenomena, including the oxygen mediated chemical track evolution. In principle, we can perform microscopic Monte Carlo (MC) simulation to quantitively test this hypothesis. Yet, to avoid the extreme high computational resource consuming, in the current CPU-based MC tools, oxygen is either ignored or taken as a continuous radical-scavenging background. Recently, our research group developed an open-source, GPU-based MC simulation tool, gMicroMC, in which, the oxygen mediated chemical …

Texas - San Marcos Weigh Station 1998, University Of Denver

FEAT Heavy-Duty Vehicle Measurements

Relevant Publications

Environmental Science & Technology Publication

Final Report

California - Port Of Los Angeles, University Of Denver

FEAT Heavy-Duty Vehicle Measurements

Relevant Publications

Environmental Science & Technology Publication (2012)

Environmental Science & Technology Publication (2013)

2008 Final Report

2009 Final Report

2010 Final Report

2012 Final Report

Geometry Aided Sonification, Michael Tecce

Computer Science Summer Fellows

Sonification is the process of deriving an audio representation of a time series which conveys important information about that time series. Otology and vision science have established that humans process audio information more quickly than visual information, and sonification can convey data to the visually impaired. In our work, we implement pipelines using Python/Numpy, and we handle both ordinary 1D time series and multivariate time series. For 1D time series, we find that using data to modulate the pitch or timing of preselected sounds (such as sine waves) simply and effectively captures repeating patterns and anomalies/outliers within the data. To …

Coqui Frog Predator Avoidance And Recognition, Karen H. Beard

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The purpose of this study was to determine whether coqui frogs from their non-native range responded to native predators the same way as frogs from their native range. Frogs were collected from two sites in Puerto Rico (El Yunque and Rio Abajo) in May 2006 and one site in Hawaii (Hilo) in June 2006. At each site, frogs were collected from a high (> 700 m) and low (< 300 m) elevation population. Of the total number of frogs collected, 100 males were randomly selected to be used in this study (45 and 55 from Hawaii and Puerto Rico, respectively). Three tailless whipscorpions (Phrynus longipes) and three tarantulas (Avicularia laeta) were also collected in Puerto Rico in field sites where frogs were collected and shipped back to a laboratory.

California - Port Of Los Angeles, Unversity Of Denver

On-road Heavy-duty Monitoring System Measurements

Relevant Publications

Environmental Science & Technology Publication (2015)

Environmental Science & Technology Publication (2017)

Environmental Science & Technology Publication (2018)

Final Report

California - Cottonwood Weigh Station, University Of Denver

On-road Heavy-duty Monitoring System Measurements

Relevant Publications

Environmental Science & Technology Publication (2015)

Environmental Science & Technology Publication (2017)

Environmental Science & Technology Publication (2018)

Final Report

Radiocarbon And Contextual Data For Non Nok Tha, Don Kok Pho And Don Pa Daeng, Khon Kaen Province, Northeast Thailand, Cyler N. Conrad, Eden Franz, Ernestene Green, Emily Lena Jones

Anthropology Datasets

This compendium includes ten documents: 1) the "Buckley Letter" describing the radiocarbon analysis results for sample I-5324, 2) the "GaK-653" sheet describing the radiocarbon analysis results for sample GaK-653, 3) the "GaK-1026" sheet describing the radiocarbon analysis results for sample GaK-1026, 4) the "Geochron Letter" describing radiocarbon analysis results for sample GX-1612, 5) Ernestene Green's ca. 1965 field notes on her test excavations at Don Kok Pho (NP6), 6) Ernestene Green's ca. 1965 field notes on her test excavations at Non Nok Tha (NP7), 7) Ernestene Green's ca. 1965 field notes on her test excavations at Don Pa Daeng (NP8), …

Mathematical Modeling: Instructor And Student Resources, Marnie Phipps, Patty Wagner

Mathematics Ancillary Materials

This collection of student and instructor materials for Mathematical Modeling contains lesson plans, lecture slides, homework, learning goals, and student notes for the following major topics:

• Linear Functions
• Quadratic Functions
• Exponential Functions
• Logarithmic Functions

This is a materials update for a collection of materials created for a Round Nine ALG Textbook Transformation Grant.

College Algebra Notes And Exercises (Gcsu), Rabia Shahbaz, Janice Alves

Mathematics Ancillary Materials

Developed as part of a Round 13 Mini-Grant, these updated supplementary materials for Stitz-Zeager Open Source Mathematics and the LibGuides Open Course for College Algebra at GCSU include notes and exercises on equations, inequalities, functions, polynomial and rational functions, and exponential and logarithmic functions are included in one .zip file.

Glyoxal’S Impact On Dry Ammonium Salts: Fast And Reversible Surface Aerosol Browning (Raw Data), David O. De Haan Phd, Lelia N. Hawkins Phd, Margaret A. Tolbert Phd, Jean-François Doussin

Chemistry and Biochemistry: Faculty Scholarship

Alpha-dicarbonyl compounds are believed to form brown carbon in the atmosphere via reactions with ammonium sulfate (AS) in cloud droplets and aqueous aerosol particles. In this work, brown carbon formation in AS and other aerosol particles was quantified as a function of relative humidity (RH) during exposure to gas-phase glyoxal (GX) in chamber experiments. Under dry conditions (RH < 5%), solid AS, AS/glycine, and methylammonium sulfate aerosol particles brown within minutes upon exposure to GX, while sodium sulfate particles do not. When GX concentrations decline, browning goes away, demonstrating that this dry browning process is reversible. Declines in aerosol albedo are found to be a function of [GX]2, and are consistent between AS and AS/glycine aerosol. Dry methylammonium sulfate aerosol browns 4´ more than dry AS aerosol, but deliquesced AS aerosol browns much less than dry AS aerosol. Optical measurements at 405, 450, and 530 nm provide an estimated Ångstrom absorbance coefficient of -16 ±4. This coefficient and the empirical relationship between GX and albedo are used to estimate an upper limit to global radiative forcing by brown carbon formed by 70 ppt GX reacting with AS (+7.6 ´10-5 W/m2). This quantity is < 1% of the total radiative forcing by secondary brown carbon, but occurs almost entirely in the ultraviolet range.

The zipped data files are in the following formats: Igor experiments (.pxp), Word documents (.docx), Excel spreadsheets (.xlsx), organized by experiment number. “Optical” files contain cavity attenuated phase shift (CAPS) extinction, scattering and albedo data; PILS/waveguide data (experiments 1,2, and 5 only); …