Open Access. Powered by Scholars. Published by Universities.®
![Digital Commons Network](http://assets.bepress.com/20200205/img/dcn/DCsunburst.png)
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Environmental Sciences (17)
- Natural Resource Economics (13)
- Natural Resources and Conservation (13)
- Social and Behavioral Sciences (13)
- Sustainability (13)
-
- Economics (12)
- Life Sciences (12)
- Oil, Gas, and Energy (11)
- Agricultural and Resource Economics (10)
- Environmental Health (10)
- Pharmacology, Toxicology and Environmental Health (10)
- Water Resource Management (10)
- Agricultural Economics (9)
- Agriculture (9)
- Biodiversity (9)
- Computer Sciences (8)
- Forest Management (8)
- Forest Sciences (8)
- Chemistry (2)
- Mathematics (2)
- Organic Chemistry (2)
- Physics (2)
- Algebra (1)
- Analysis (1)
- Applied Mathematics (1)
- Art and Design (1)
- Arts and Humanities (1)
- Astrophysics and Astronomy (1)
- Atomic, Molecular and Optical Physics (1)
- Keyword
-
- Climate change (3)
- Maine (2)
- Active galactic nucleus black holes (1)
- Adamantylidenecarbene (1)
- Alternative energy (1)
-
- Art (1)
- Art museums (1)
- Banach Space (1)
- Beach Width (1)
- Bio fuels (1)
- BioCarbon (1)
- Biomass (1)
- Black holes (1)
- CE (1)
- Cafe Standards (1)
- Carbene (1)
- Carbenes (1)
- Carbon cycling (1)
- Carbon neutrality (1)
- Cauchy-Schwarz Inequality (1)
- Central Maine (1)
- Chandra Space Telescope (1)
- Choice Experiment (1)
- Climate change; beliefs; responsibility; economics (1)
- Colby College (1)
- Completely Bounded maps (1)
- Conservation (1)
- Coral (1)
- Cost Benefit (1)
- Drones for Good (1)
- Publication
- Publication Type
- File Type
Articles 1 - 30 of 34
Full-Text Articles in Physical Sciences and Mathematics
Using Choice Experiment Valuation Methods To Measure Public Preference For A New National Park In Maine, Alexander G. Wilsterman
Using Choice Experiment Valuation Methods To Measure Public Preference For A New National Park In Maine, Alexander G. Wilsterman
Journal of Environmental and Resource Economics at Colby
With global population increasing faster than ever, the need to protect land from development is at an all-time high. This paper seeks the measure the public preference for a new national park located in northern Maine. A national park will both protect the land and inject a much-needed economic stimulus to the surrounding communities. The study uses the choice experiment valuation method to quantify its results. Through this revealed preference we can quantify which characteristics are most important to the public so that these characteristics may be considered if the project is ever approved.
Golf Courses In Maine: Land Type Valuation Versus A Hedonic Pricing Analysis, Gregory Ladd, Jason Buco
Golf Courses In Maine: Land Type Valuation Versus A Hedonic Pricing Analysis, Gregory Ladd, Jason Buco
Journal of Environmental and Resource Economics at Colby
Many studies have been conducted analyzing the economic impact of golf courses on the local communities. These studies examine economic impacts of tournaments, endorsements, and vacation expenses of the major golf courses in the United States. However, there is little research conducted on the environmental impact of Golf courses, specifically in Maine. This paper performs a hedonic pricing analysis using housing prices in proximity to golf courses and compares it to the valuation of various land types in Maine. Housing prices were collected in the towns of Auburn, and North Yarmouth both near and distant from the local golf course. …
Converting Croplands To Grassland: A Spatial Analysis Of The Economic Feasibility Of Soil Greenhouse Gas Mitigation In Midwest, United States, Paco C. Defrancis
Converting Croplands To Grassland: A Spatial Analysis Of The Economic Feasibility Of Soil Greenhouse Gas Mitigation In Midwest, United States, Paco C. Defrancis
Journal of Environmental and Resource Economics at Colby
The global agriculture sector is responsible for close 20% of the aggregate anthropogenic greenhouse gas (GHG) emissions emitted since the start of the industrial age. Much of these emissions are attributed to the degradation of soils due to land use change when native ecosystems were converted to agricultural fields. Soil organic carbon (SOC) has been found to decrease in temperate soils when the native (such as a forest or grassland) ecosystem is replace by croplands. The aggregate amount of organic carbon stored in soils globally is estimated be 3.3x the size of the atmospheric carbon pool. Further soil degradation and …
Cost Benefit Analysis Of Café Standards Compared To The Alternative Fuel/Carbon Tax, Brian Levinson
Cost Benefit Analysis Of Café Standards Compared To The Alternative Fuel/Carbon Tax, Brian Levinson
Journal of Environmental and Resource Economics at Colby
The Cafe Standards were introduced in 1975 following the Oil Embargo. The goals of this program were simple. To reduce co2 emissions in vehicles by increasing a mandatory average mpg level for car manufacturers in the United States. Recently, in 2012, the Obama Administration set new Cafe Standard requirements for car manufacturers. By 2025, all new cars on the road in the United States must average 54.5 miles per gallon, which would double the current 27 mpg average in place right now. While the intentions of this policy are to reduce co2 emissions while at the same time increasing savings …
The Economics Of The Audubon Society's Sanctuary Program For Golf Courses, Dan Hyszczak
The Economics Of The Audubon Society's Sanctuary Program For Golf Courses, Dan Hyszczak
Journal of Environmental and Resource Economics at Colby
Millions of people play golf every year, and in 2011 Golf Courses gained $22 billion dollars in revenue. This statistic combined with golf’s inherent place in the natural environment lead to questions of value and development for golf course owners. In 1991, The Audubon Society created their Cooperative Sanctuary Program for Golf Courses (ACSP) to promote environmentally sustainable practices for golf courses and to recognize the courses that are the most environmentally in both the United States and around the world.
This paper builds off of prior research that connects golf course beauty with revenue by examining the effects of …
Preferences For Coral Reef And Fishery Management In Okinawa, Japan, Nils Carlson
Preferences For Coral Reef And Fishery Management In Okinawa, Japan, Nils Carlson
Journal of Environmental and Resource Economics at Colby
This study is an example of how a nonmarket valuation method – a choice experiment – can be used to influence and guide ecosystem conservation efforts. Using a choice experiment survey, this study estimates the willingness to pay (WTP) for certain hypothetical attributes of a restored and conserved coral reef in Okinawa, Japan. I find that an increase in the amount of fish available to catch in ten years as well as an increase in the extent and health of the coral reefs and the number of marine biodiversity found in the Okinawan waters after ten-years, both positively affect respondent’s …
An Exploratory Statistical Analysis Of The External And Internal Effects Of Art Museums In The United States, John Eder
Journal of Environmental and Resource Economics at Colby
An Exploratory Statistical Analysis of the External and Internal Effects of Art Museums in the United States
How Does The Stock Market Value The Renewable Energy Sector: A Public Announcement Analysis And Test Of The Efficient Market Hypothesis, Jack Crampton
How Does The Stock Market Value The Renewable Energy Sector: A Public Announcement Analysis And Test Of The Efficient Market Hypothesis, Jack Crampton
Journal of Environmental and Resource Economics at Colby
This study analyzes the market reaction to public announcements in the stock market. The efficient market hypothesis is put to test and similar studies are reexamined in the context of the renewable energy sector. Through fixed effects models, we can assess the validity to the efficient market hypothesis and assess how the market values the clean energy sector.
The Effects Of Land Conservation On Productivity, Robert Mccormick, Carolyn Fuwa
The Effects Of Land Conservation On Productivity, Robert Mccormick, Carolyn Fuwa
Journal of Environmental and Resource Economics at Colby
In this research the relationship between productivity of land conservation is analyzed using panel data of the GDP and acres conserved of all 50 U.S. states from 1998-2005. Two main theories of the conservation productivity relationship exist. The first maintains that conservation impedes productivity because it does not allow land cultivation. Conversely, the second theory maintains that land conservation has a positive effect on GDP due to the recreation and tourism it creates. Through the use of fixed effects and random effects regressions, the amount of land conserved per state is not a significant predictor of state GDP The GDP …
A Survey On Climate Change: How Beliefs Shape Responsibility, Connor P. Clancy, Sarah Beth Solomon
A Survey On Climate Change: How Beliefs Shape Responsibility, Connor P. Clancy, Sarah Beth Solomon
Journal of Environmental and Resource Economics at Colby
This paper examines the lack of awareness and feelings of personal responsibility for climate change. Previous literature suggests that while part of the United States population may be aware of climate change, they do not feel personally responsible for causing it despite feeling climate change’s effects just like everyone else. Furthermore, studies suggest that individuals also do not believe climate change will affect them now, but rather it is an issue for future generations. Using a survey, we examine which demographics and personal factors are most important in eliciting awareness for climate change, and furthermore, personal responsibility for its effects. …
The Value Of Dune Width In Avalon, New Jersey: A Hedonic Pricing Analysis, Matt Mignon
The Value Of Dune Width In Avalon, New Jersey: A Hedonic Pricing Analysis, Matt Mignon
Journal of Environmental and Resource Economics at Colby
Previous research on the economics of coastal housing markets has proven that housing values along the east coast of the United States capitalize on the attributes of local beaches. These recent studies document two important findings: that beach width positively affects coastal property values and that there is a proximity effect, in which distance from the beach plays a significant role in the capitalization of local beach attributes. This paper builds upon these findings to explore the influence that dune width has on coastal property values in Avalon, New Jersey. I hypothesize that as dune width increases, local property values …
Invited Introduction To Jerec, Noelwah Netusil
Invited Introduction To Jerec, Noelwah Netusil
Journal of Environmental and Resource Economics at Colby
No abstract provided.
Welcome By The Editor, Sahan T. M. Dissanayake
Welcome By The Editor, Sahan T. M. Dissanayake
Journal of Environmental and Resource Economics at Colby
No abstract provided.
Shooting For The Sky: Martin Tengler Is Part Of A Team That Wants To Use Drones To Plant A Billion Trees A Year, Gerry Boyle
Shooting For The Sky: Martin Tengler Is Part Of A Team That Wants To Use Drones To Plant A Billion Trees A Year, Gerry Boyle
Colby Magazine
Martin Tengler '12 can picture a time when aerial drones fan out to map vast reaches of deforested land and then plant thousands of seed pods that will turn wasteland into new forest.
Extragalactic Explorers: Professors Elizabeth Mcgrath And Dale Kocevski Divine The Mysteries Of The Universe, Gerry Boyle
Extragalactic Explorers: Professors Elizabeth Mcgrath And Dale Kocevski Divine The Mysteries Of The Universe, Gerry Boyle
Colby Magazine
From their offices on the fourth floor of the Mudd Science Building, Elizabeth McGrath and Dale Kocevski enjoy a view that takes in the terraced lawn of the academic quad, the rooftops of Lovejoy and Cotter Union- and distant galaxies as they appeared when the universe was young.
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 …
An Exploration Into Computer Graphics: L-Systems And A Non-Photorealistic Filter, Victoria Edwards
An Exploration Into Computer Graphics: L-Systems And A Non-Photorealistic Filter, Victoria Edwards
CLAS: Colby Liberal Arts Symposium
This past fall I worked on developing a graphics pipeline. I implemented a handful of graphics algorithms that allowed me to render creative scenes. This semester we explored the world of computer graphics by doing an in-depth study of different areas in the field. To do this we read critical SIGGRAPH papers on the subjects. SIGGRAPH is the publication forum for computer graphics and it maps the last forty years of research in the computer graphics world. This semester I have decided to focused on the photorealistic method of creating L-Systems and a non-photo realistic image filter.
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
Photorealistic Computer Rendering, William Kearney
Photorealistic Computer Rendering, William Kearney
CLAS: Colby Liberal Arts Symposium
Sample portfolio demonstrating photorealistic and non-photorealistic computer graphic techniques such as ray tracing and edge detection.
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.
Finding Aid To The Bern Porter Collection Of Contemporary Letters, Bern Porter, Colby College Special Collections
Finding Aid To The Bern Porter Collection Of Contemporary Letters, Bern Porter, Colby College Special Collections
Finding Aids
Bern Porter (1911–2004) was an artist, writer, philosopher, and scientist who was involved in the development of the cathode ray tube, the Saturn V rocket, and the Manhattan Project, which he renounced upon learning of the bombing of Hiroshima. Also a pioneer in the arts, he is known for his landmark work as an author and publisher. He was an early practitioner of mail art and found and performance poetry and experimented with typography, sculpture, photography, artists’ books, and collage throughout his life. Porter lived and worked in New Jersey, New York, Tennessee, California, Guam, Alabama, and Tasmania. He finally …
The Central Hankel Transform, Matthew J. Levine
The Central Hankel Transform, Matthew J. Levine
Honors Theses
This honors thesis presents the Hankel transform on an integer sequence, a function with colorful mathematical history and rich theoretical background. We then introduce a matricial Toeplitz transform that parallels some of most famous qualities of the Hankel transform, especially when in consideration of popular sequences like the Fibonacci numbers. The result is a characterization of the injectivity of this new function, a description of some of its interesting behaviors, and a discussion of a few new Fibonacci identities.
Assessing The Carbon Impacts Of Colby College’S Biomass Plant, Alice Hotopp
Assessing The Carbon Impacts Of Colby College’S Biomass Plant, Alice Hotopp
Honors Theses
Biomass energy plants are considered to be carbon neutral systems under some definitions. However, this concept of carbon neutrality needs to be rethought in order to understand the true carbon impact of biomass plants upon global climate change. A biomass plant’s wood source, the extent to which the biomass plant emits carbon dioxide, and the timescale over which the biomass plant emits carbon should all be taken into account. In this study, I consider the Colby College biomass plant’s role in carbon cycling. Colby’s Physical Plant Department provided me with information on how much carbon (tons of woodchips) is used …
Quantization Of Analysis, Kelvin K. Lui
Quantization Of Analysis, Kelvin K. Lui
Honors Theses
In quantum mechanics the replacement of complex vectors with operators is essential to “quantizing” space. Nonetheless, in many physics textbooks there is no justification for this action. Therefore in this thesis I will attempt to understand the mathematical formalism that allows for such a “replacement” to be rigorous. I will approach this topic by first defining a vector spaces and its dual space, a Hilbert space and a conjugate Hilbert space, and an operator space. Next, I will look at the algebraic tensor product of two vector spaces, two Hilbert spaces, and finally two operator spaces. Ultimately we will look …
Construction And Optimization Of A Tapered Amplifier System For Applications In Ultra-Cold Plasma Research, Ryan Cole
Honors Theses
The number density of cold atoms confined in a magneto-optical trap (MOT) is critically dependent on the intensity of the lasers used to cool the sample. To generate large optical powers while retaining the practicality of homemade external cavity diode lasers (ECDLs), a tapered amplifier (TA) system was designed and constructed to amplify the output of an existing 780 nm, continuous-wave ECDL. The amplifier’s performance is discussed in terms of its gain and power output. Under standard operating conditions, optical amplification of 12 dB is achieved, with a maximum power output of 0.75 W. The completed amplifier is installed into …
Mathematical Modeling Of Emiliania Huxleyi And A Host-Specific Virus, Julia Middleton
Mathematical Modeling Of Emiliania Huxleyi And A Host-Specific Virus, Julia Middleton
Honors Theses
The world’s oceans provide the basis for life on the planet. One microscopic algae, the coccolithophores, and Emiliania huxleyi in particular, is a major source of carbon drawdown in the context of the global carbon cycle and account for a significant amount of the primary production in oceanic ecosystems. We know that the oceans are packed with marine viruses and they have an important role in the rise and fall of plankton populations but current mathematical models do not accurately account for virus-host interactions when predicting plankton blooms. Therefore I am using model optimization and comparison techniques to evaluate current …