Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Environmental Sciences (12)
- Chemistry (6)
- Analytical Chemistry (3)
- Artificial Intelligence and Robotics (3)
- Computer Sciences (3)
-
- Environmental Health and Protection (3)
- Life Sciences (3)
- Natural Resources Management and Policy (3)
- Natural Resources and Conservation (3)
- Social and Behavioral Sciences (3)
- Sustainability (3)
- Environmental Chemistry (2)
- Law (2)
- Natural Resource Economics (2)
- Physical Chemistry (2)
- Physics (2)
- Plant Sciences (2)
- Political Science (2)
- African Studies (1)
- Agriculture (1)
- Animal Sciences (1)
- Astrophysics and Astronomy (1)
- Business (1)
- Cosmology, Relativity, and Gravity (1)
- Dairy Science (1)
- Earth Sciences (1)
- Environmental Education (1)
- Environmental Indicators and Impact Assessment (1)
- Environmental Law (1)
- Keyword
-
- California (2)
- Climate Change (2)
- 3TGs (1)
- Agricultural Biomass Burning (1)
- Aquifer (1)
-
- Authority (1)
- Basin (1)
- Biodegradable (1)
- Bioplastic (1)
- Bioretention (1)
- Burning Alternatives (1)
- Business value (1)
- Climate Governance (1)
- Climate Justice (1)
- Colley method (1)
- Coltan (1)
- Compost (1)
- Compostable plastic (1)
- Conductivity (1)
- Conflict Minerals (1)
- Cosmology (1)
- DRC (1)
- Department of water resources (1)
- EPR (1)
- Electrochemistry (1)
- Emissions Intensity (1)
- Environmental change (1)
- Extended producer responsibility (1)
- Ferricyanide (1)
- Fire (1)
- Publication
- Publication Type
- File Type
Articles 1 - 23 of 23
Full-Text Articles in Physical Sciences and Mathematics
Triple Bottom Line As A Method To Increase Business Value And Foster Positive Social And Environmental Change, Jayleene West
Triple Bottom Line As A Method To Increase Business Value And Foster Positive Social And Environmental Change, Jayleene West
Master's Theses
The Triple Bottom Line (TBL) business model has transformed the business world by changing the way businesses operate. By focusing on the people and the environment, businesses have grown to see substantial profit and avoid risks along the way. Companies are using the TBL to build their brand and customer loyalty by enhancing the environment and society. This paper analyzes four companies that are leaders in their industry and are founded on the TBL; Seventh Generation, New Belgium Brewing, Patagonia, and Ben & Jerry’s. Recommendations have been made by performing a literature review on the advantages and disadvantages of the …
Detection And Melting Of Surface-Bound Dna Using A Purely Electrochemical Approach, Denny Ho
Detection And Melting Of Surface-Bound Dna Using A Purely Electrochemical Approach, Denny Ho
Master's Theses
In this thesis, we demonstrate an electrochemical approach for monitoring the electric-field induced melting of surface-bound double-stranded DNA. The electrochemical routine involves repeated chronoamperometry pulses to melt the duplex and square wave voltammetry to monitor the extent of melting. We utilize a scanning potential and constant potential technique to generate melting curves and access the stability and kinetics of the DNA duplexes. Our method uses a mixed monolayer of thiol-modified DNA oligomers and mercaptohexanol on gold electrodes, are subsequently incubated with target DNA covalently modified with electroactive methylene blue. Under room temperature, 10 mM Tris, and optimized electrochemical parameters, DNA …
The Investigation Of The Chlorine Initiated Oxidation Of 2-Phenylethanol And Stability Of Superalkali Lithium Substituted Silyls., Adam Otten
Master's Theses
This thesis investigates the combustion potential of 2-phenylethanol and the superalkali properties of small lithium substituted silicon compounds. All combustion experiments were performed at the Advanced Light Source of Lawrence Berkeley National Laboratory at the Chemical Dynamics Beamline 9.0.2. The chlorine initiated oxidation of 2PE was investigated at 298 and 550 K using a multiplex photoionization mass spectrometer, coupled with the tunable vacuum ultraviolet radiation. Reaction products were identified using kinetic time traces and photoionization spectra.
Additionally, the stability of small superalkali silicon-lithium compounds has also been investigated. All structures and energetics were calculated using the CBS-QB3 composite method.
The …
Electropolymerization Of Polyaniline In The Presence Of Ferricyanide: Electrochemical, Spectroscopic And Gravimetric Studies, Lucas Marinelli
Electropolymerization Of Polyaniline In The Presence Of Ferricyanide: Electrochemical, Spectroscopic And Gravimetric Studies, Lucas Marinelli
Master's Theses
In this work, ferricyanide-doped polyaniline (PANI) is electropolymerized by constant current and cyclic voltammetry (CV) measurements with simultaneous monitoring of mass changes using electrochemical quartz crystal microbalance (eQCM). Raman spectroscopy, Fourier transform infrared spectroscopy and CV measurements confirm the incorporation of the ferricyanide into the film and indicate modified electrical conductivity. UV-Vis absorbance spectroscopy and Raman spectroscopy confirm the conducting ‘emeraldine-salt’ state and confirm the presence of polarons, i.e. charge carriers.
The addition of ferricyanide during electropolymerization of the PANI film results in an increase of polymerization rate as confirmed using eQCM. A decrease in counter ion ingress/egress and an …
Sustainably Managing Groundwater - Surface Water Interactions Within The Santa Rosa Plain Basin, Rhianna Frank
Sustainably Managing Groundwater - Surface Water Interactions Within The Santa Rosa Plain Basin, Rhianna Frank
Master's Projects and Capstones
In this paper, I designed a strategy for implementation of sustainably managing groundwater-surface water interactions in the Santa Rosa Plain Basin in compliance with the requirements set forth by the Sustainable Groundwater Management Act of 2014. The research objectives for this analysis are: (1) to fully examine the requirements of the Sustainable Groundwater Management Act and the implications that implementation will have on the Santa Rosa Plain Basin, (2) to use technical data gathered regionally coupled with related policy design theory to analyze how groundwater and surface water interactions can be managed to meet the requirements set forth in this …
An Evaluation Of Extended Producer Responsibility (Epr) As A Policy Option For Compostable Plastics In California, Amy Franz
Master's Projects and Capstones
This research project evaluates Extended Producer Responsibility (EPR) in California as a viable option to address the end-of-life management challenges identified for compostable plastics. The evaluation is done in three ways (1) review the main challenges identified for managing compostable plastics against the existing California EPR laws for mercury thermostats, agricultural pesticide containers, carpet, paint and mattresses to look for overlap in issues EPR has been used to address, (2) review compostable plastics in the context of the Product Selection Criteria used by California, (3) Look at the California Framework for setting up an EPR program to lay out what …
The Discovery Of A Gravitationally Lensed Supernova Ia At Redshift 2.22, David Rubin, Brian Hayden, Xiaosheng Huang, Greg Aldering, R Amanullah, K Barbary, K Boone, M Brodwin, S E. Deustua, S Dixon, P Eisenhardt, A S. Fruchter, A H. Gonzalez, A Goobar, R R. Gupta, I Hook, M. James Jee, A G. Kim, M Kowalski, C Lidman, E V. Linder, K Luther, J Nordin, R Pain, Saul Perlmutter, Z Raha, M Rigault, P Ruiz-Lapuente, C Saunders, C Sofiatti, A L. Spadafora, S A. Stanford, D Stern, N Suzuki, S C. Williams
The Discovery Of A Gravitationally Lensed Supernova Ia At Redshift 2.22, David Rubin, Brian Hayden, Xiaosheng Huang, Greg Aldering, R Amanullah, K Barbary, K Boone, M Brodwin, S E. Deustua, S Dixon, P Eisenhardt, A S. Fruchter, A H. Gonzalez, A Goobar, R R. Gupta, I Hook, M. James Jee, A G. Kim, M Kowalski, C Lidman, E V. Linder, K Luther, J Nordin, R Pain, Saul Perlmutter, Z Raha, M Rigault, P Ruiz-Lapuente, C Saunders, C Sofiatti, A L. Spadafora, S A. Stanford, D Stern, N Suzuki, S C. Williams
Physics and Astronomy
We present the discovery and measurements of a gravitationally lensed supernova (SN) behind the galaxy cluster MOO J1014+0038. Based on multi-band Hubble Space Telescope and Very Large Telescope (VLT) photometry of the supernova, and VLT spectroscopy of the host galaxy, we find a 97.5% probability that this SN is a SN Ia, and a 2.5% chance of a CC SN. Our typing algorithm combines the shape and color of the light curve with the expected rates of each SN type in the host galaxy. With a redshift of 2.2216, this is the highest redshift SN Ia discovered with a spectroscopic …
Investigation On The Dissociative Photoionization Mechanism Of Furfural, Investigation Of The Absolute Photoionization Cross Sections Of Three Potential Propargylic Fuels, And Ab Initio Analysis On Potential Superbases Of Several Hyperlithiated Species: Li3f2o And Li3f2(Oh)N (N = 1, 2, 3), Matthew Winfough
Master's Theses
This thesis presents the study photoionization cross sections of three different propargylic biofuels; dipropargyl ether, propargyl alcohol, and propargylamine, in chlorine radical-initiated combustion experiments at the Chemical Dynamics Beamline (9.0.2) at the Advanced Light Source of the Ernest Orlando Berkeley National Laboratory in Berkeley, California. Additionally, the unimolecular dissociative photoionization mechanism of furfural was studied using photoelectron photoionization coincidence (PEPICO) spectroscopy at the vacuum ultraviolet beamline at the Swiss Light Source of the Paul Scherrer Institut in Villigen, Switzerland. Dissociation products and mechanisms for furfural were identified over a photon energy range of 10.9 to 14.5 eV. Lastly, a study …
Evaluating Capital And Maintenance Costs For Four Low Impact Development Treatment Systems, And Their Efficiency In Removing Total Suspended Solids From Storm Water Runoff, Jimmy A. Dileo
Master's Projects and Capstones
Storm water runoff is the leading source of surface water pollution. To reduce the amount of contaminants in storm water runoff, municipalities and city governments require developers to construct storm water treatment measures, or low impact development (LID) systems, as part of the development project. LID storm water treatment systems utilize a mix of sedimentation, filtration, adsorption, and phytoremediation as mechanisms that remove pollutants from storm water prior to discharging to waterbodies. Existing studies have shown that LID storm water measures are effective in reducing runoff and improving water quality, but studies that can assist decision makers in selecting the …
Mineral Warfare: The Dark Side Of Technology And International Mediation, Priyanka Basnyat
Mineral Warfare: The Dark Side Of Technology And International Mediation, Priyanka Basnyat
Master's Theses
Conflict surrounding the extraction and trade of natural resources is not an uncommon phenomenon. Especially in the case of the Democratic Republic of Congo (DRC), which has historically suffered from the negative impacts of the resource curse since their mineral wealth was first discovered by their Colonial administrators. The importance of Congo’s minerals has fluctuated over the years but has peaked during recent times, as their use in technological advancements are becoming more vital. The global demand for these mineral ores have sky rocketed and consequentially, the largely informal trade has benefitted certain rebel groups, playing a pivotal role in …
Causal Fire Relationships In Sonoma County & Identification Of Suitable Fire Management Strategies, Allison Howlett
Causal Fire Relationships In Sonoma County & Identification Of Suitable Fire Management Strategies, Allison Howlett
Master's Projects and Capstones
Acknowledging recent wildfires that have set historic fire size records in both Northern and Southern California, it is important to understand what impacts can be expected and how variations in regional characteristics can influence fire severity. Combining a long history of droughts alongside periodic rain events this paper considers the causal fire relationships and fire management strategies necessary for implementation for future fire size and fire severity reduction in Sonoma County. Throughout this paper a subset of questions are answered regarding fire severity, precipitation, erosion and sediment response. Methods include the examination of peer-reviewed articles and grey sources to identify …
Alternatives To Traditional Agricultural Biomass Burning In Napa Valley, Daniela Bazán
Alternatives To Traditional Agricultural Biomass Burning In Napa Valley, Daniela Bazán
Master's Projects and Capstones
Vineyard pruning residues and removed vines create an annual biomass waste issue for growers in Napa Valley. Traditionally this agricultural biomass waste is eliminated by open burning, but with increasing public health and climate change concerns as well as public outcry over large smoke plumes in picturesque Napa Valley, it is necessary to evaluate the alternatives to traditional agricultural biomass burning. The purpose of this study is to evaluate and compare these alternatives and to determine the most sustainable and practicable alternatives for use in Napa Valley. The alternatives to traditional agricultural biomass burning analyzed in this study include low-smoke …
What’S At Steak? The Political Discourse Of Emissions Intensity And Implications Of Animal Agriculture, Kalyn Simon
What’S At Steak? The Political Discourse Of Emissions Intensity And Implications Of Animal Agriculture, Kalyn Simon
Master's Theses
This thesis analyzes the international discourse of greenhouse gas emissions in relation to livestock production. Specific government ministries, research institutes, and multilateral organizations are framing a new strategy to mitigate emissions by using emissions intensity metrics. Emissions intensity is a ratio comparing emissions produced per unit of animal product as oppose to measuring absolute emissions. This research is acknowledged as a win-win scenario which allows for a reduction of greenhouse gas emissions while continuing production more efficiently. This thesis outlines the emergence of this metric in international discourse and the implications this shift has on the livestock sector globally. Ultimately, …
Forecasting Smart Meter Energy Usage Using Distributed Systems And Machine Learning, Feiran Ji, Chris Dong, Lingzhi Du, Zizhen Song, Yuedi Zheng, Paul Intrevado
Forecasting Smart Meter Energy Usage Using Distributed Systems And Machine Learning, Feiran Ji, Chris Dong, Lingzhi Du, Zizhen Song, Yuedi Zheng, Paul Intrevado
Creative Activity and Research Day - CARD
In this research, we explore the technical and computational merits of a machine learning algorithm on a large data set, employing distributed systems. Using 167 million(10 GB) energy consumption observations collected by smart meters from residential consumers in London, England, we predict future residential energy consumption using a Random Forest machine learning algorithm. Distributed systems such as AWS S3 and EMR, MongoDB and Apache Spark are used. Computational times and predictive accuracy are evaluated. We conclude that there are significant computational advantages to using distributed systems when applying machine learning algorithms on large-scale data. We also observe that distributed systems …
Plant Biodiversity In The Face Of Climate Change: What Will Become Of Coastal Endemic Species?, Nila Le
Plant Biodiversity In The Face Of Climate Change: What Will Become Of Coastal Endemic Species?, Nila Le
Creative Activity and Research Day - CARD
How will longitudinally constrained coastal flora fare in the face of rapid anthropogenic climate change and disturbance? Coastal communities pose a unique problem for climate change and its associated risks. Species that are concentrated along the coast are naturally vulnerable to the influence of harsh abiotic ecology, such as coastal erosion and high salt concentrations. In addition, analogous to montane species-habitat interactions, coastal communities may be “pushed” off the coast edge as a result of tracking preferred climate in the face of climate variability and sea level rise. This can be problematic for species that cannot disperse quickly enough to …
Cerebral Necrosis Research With Machine Learning Techniques, Sangyu Shen
Cerebral Necrosis Research With Machine Learning Techniques, Sangyu Shen
Creative Activity and Research Day - CARD
Cerebral necrosis after radiotherapy for patients with brain metastases is being recognized as a problem more common than previously estimated. To better understand the onset of necrosis and reduce its occurrence, we studied the relationships between features of patients and necrosis onset with machine learning techniques.
Using Monte Carlo Simulation To Derive Electron Energy Distribution Functions In Argon Plasma, Ivan Sepulveda
Using Monte Carlo Simulation To Derive Electron Energy Distribution Functions In Argon Plasma, Ivan Sepulveda
Creative Activity and Research Day - CARD
A two-dimensional Monte-Carlo simulation is used to obtain distribution of electron energies inside low temperature argon plasma. The simulation written using a python script propagates an electron inside plasma by checking whether an electron collides with an argon atom and checking whether an elastic or inelastic collision occurred. Low temperature plasmas are commonly used for plasma etching in the semiconductor and medical fields.
Ligand Substitution Of Ruthenium (Ii) Complexes That Elicit Physical And Chemical Changes, Dakota Tan, Megan Farley, Jeff Curtis, John Hendrix
Ligand Substitution Of Ruthenium (Ii) Complexes That Elicit Physical And Chemical Changes, Dakota Tan, Megan Farley, Jeff Curtis, John Hendrix
Creative Activity and Research Day - CARD
Over the last few years the exploration into ruthenium compounds and the field of coordination chemistry have grown. Ruthenium (II) and ruthenium (III) carry oxidation states that accommodate six-coordinated octahedral configurations in which axial attached ligands can determine chemical and steric properties. UV/Vis spectrometry, H1 NMR, and electrochemical voltammetry will be used to gather data from previously synthesized ruthenium (II) coordination complexes. We hope that by substituting various R groups on three different locations of our ruthenium (II) complex we will be able to control for many physical and chemical changes. After collecting the data from all three complimentary techniques …
Examining The Bacterial Methionine Transporter Utilizing Soluble Lipid Bilayer Systems, Gabrielle Isabelle Servito, Michael Winslow, Dennis Hicks, Lyle Patrick Ureta
Examining The Bacterial Methionine Transporter Utilizing Soluble Lipid Bilayer Systems, Gabrielle Isabelle Servito, Michael Winslow, Dennis Hicks, Lyle Patrick Ureta
Creative Activity and Research Day - CARD
The phospholipid bilayer present in both eukaryotes and prokaryotes regulates the cell’s acquisition of nutrients and excretion of waste. Studies on the complex components of the lipid bilayer have paved the way for learning about the selective permeability of the membrane. It is of great interest to understand how materials are being transported through transmembrane proteins in relation to the electrochemical gradient. Investigation into the mechanistic properties of these transport proteins, particularly ATP-binding cassettes (ABC) transporters, can clarify how substrates are being transported via the binding and hydrolysis of adenosine triphosphate (ATP). The study of ABC transporters is significant in …
An Optimization Approach To Automate The Generation Of Radiotherapy Treatment Plans, Qian Li
An Optimization Approach To Automate The Generation Of Radiotherapy Treatment Plans, Qian Li
Creative Activity and Research Day - CARD
The main goal of radiotherapy is to deliver a specified dose of radiation directly to the tumor while minimizing radiation damage to healthy tissues. Currently, the treatment plan is being developed by professional planners using a commercial treatment planning system. In this treatment planning system, the planner modifies the objectives and weights of the objectives until an ideal combination of doses is achieved. This arbitrary process can cost a few hours or a day to finish. My research aims to automate the generation of the plans by implementing an optimization algorithm on top of the treatment planning system using gradient …
Improving Habitat Restoration For Native Pollinators In San Francisco, Tyrha Delger
Improving Habitat Restoration For Native Pollinators In San Francisco, Tyrha Delger
Creative Activity and Research Day - CARD
By looking at how these three species are conserved inside and outside of San Francisco, how an urban environment might affect habitat conservation, and lessons learned from other cities’ restoration projects, we can improve urban habitat conservation projects.
A Network Diffusion Ranking Family That Includes The Methods Of Markov, Massey, And Colley, Stephen Devlin, Thomas Treloar
A Network Diffusion Ranking Family That Includes The Methods Of Markov, Massey, And Colley, Stephen Devlin, Thomas Treloar
Mathematics
We present a one parameter family of ratings and rankings that includes the Markov method, as well as the methods of Colley and Massey as particular cases. The rankings are based on a natural network diffusion process that unites the methodologies above in a common framework and brings strong intuition to how and why they differ. We also explore the behavior of the ranking family using both real and simulated data.
Disproportionate Realities: The Climate Justice Implications Of Mitigation Policies Across Scales, Tinuviel Carlson
Disproportionate Realities: The Climate Justice Implications Of Mitigation Policies Across Scales, Tinuviel Carlson
Undergraduate Honors Theses
Global climate change will have disproportionate effects on low-income and minority communities around the world producing important justice challenges. As national governments increasingly rely on local governments, civil society, and private transnational actors to establish and implement climate actions policies, it is important to assess whether and how these newly emergent actors can address these justice challenges. First this thesis examines concepts of justice in relation to climate change across different scales in order to develop a comprehensive conceptual framework of climate justice. This conceptual framework expands the scale of the international climate justice movement address local concerns. Further, the …