Digital Commons Network^™

A Hyperbolic Two -Step Model Based Finite Difference Method For Studying Thermal Deformation In A Micro Thin Film Heated By Ultrashort -Pulsed Lasers, Tianchan Niu

Doctoral Dissertations

Heat transport through micro thin films plays a very important role in microtechnology applications. Many microelectronic devices have metal thin films as their key components. Microscale heat transfer is also important for the thermal processing of materials, including laser micromachining, laser patterning, laser synthesis and laser surface hardening. Hence, studying the thermal behavior of thin films is essential for predicting the performance of a microelectronic device or for obtaining the desired microstructure. Recently, it has become very popular to use ultrashort-pulsed lasers in thermal processing, which lasers have pulse durations of the order of subpicoseconds to femtoseconds, and these kinds …

Introduction And Recovery Of Ga And N Sublattice Defects In Electron-Irradiated Gan, F. Tuomisto, V. Ranki, David C. Look, Gary C. Farlow

Physics Faculty Publications

We have used positron annihilation spectroscopy to study the introduction and recovery of point defects introduced by 0.45 and 2 MeV electron irradiation at room temperature in n-type GaN. Isochronal annealings were performed up to 1220 K. We observe vacancy defects with specific lifetime of τ_V=190±15 ps that we tentatively identify as N vacancies or related complexes in the neutral charge state in the samples irradiated with 0.45 MeV electrons. The N vacancies are produced at a rate Σ_N^0.45≃0.25 cm⁻¹. The irradiation with 2 MeV electrons produces negatively charged Ga vacancies and negative …

The Voice, Fall 2007: Volume 53, Issue 1, Dordt College

The Voice Archive

Maas Turns Stewardly Passion into Environmental Internship; It's All About the Graduates; Two Grants Will Benefit the Education Department; May Trips Put Students in Other Cultures; Music CDs Showcase Dordt Student Musicians' Talents; Engineering Grads Continue Seven Year Streak; 20th Annual Faculty Poetry Reading Celebrates Life; Brue Receives Second Energy Grant; Dordt is Third on Best Colleges List; Schuttinga Takes Helm in Student Services; Cella Bosma Graciously Accepts John Calvin Award; Faculty News; Biorenewable Energy: Dordt Engineers Look for Greener Energy Alternatives; Defenders Surge into Season; New Scoreboards at De Witt Gymnasium; Alumni Council Faces New Issues; Alumni Notes; The …

Report On Mini-Workshop “Bringing Margins Science To The Classroom”, Cathy Manduca, Jeffrey G. Ryan, Don Reed

Geology Faculty Publications

MARGINS has been awarded an NSF Course, Curriculum, and Laboratory Improvement (CCLI) grant to bring MARGINS research into widespread use in undergraduate teaching in ways that showcase the integrated, multidisciplinary approach that is characteristic of modern, front-line geoscience research. In collaboration with the Science Education Resource Center (SERC) at Carleton College, the project is developing a web-based collection of teaching materials referred to as “Mini-Lessons” (http://serc.carleton.edu/margins). Mini-Lessons range in scope from something as simple as the use of MARGINS science to illustrate a lecture to multi-day lab projects that capitalize on the MARGINS Data Repository. An exciting aspect of this …

Downregulation Of Rap1gap Contributes To Ras Transformation, Oxana Tsygankova, Gregory V. Prendergast, Kanchan Puttaswamy, Yan Wang, Michael D. Feldman, Hongbin Wang, Marcia S. Brose, Judy L. Meinkoth

Faculty, Staff and Student Publications

Although abundant in well-differentiated rat thyroid cells, Rap1GAP expression was extinguished in a subset of human thyroid tumor-derived cell lines. Intriguingly, Rap1GAP was downregulated selectively in tumor cell lines that had acquired a mesenchymal morphology. Restoring Rap1GAP expression to these cells inhibited cell migration and invasion, effects that were correlated with the inhibition of Rap1 and Rac1 activity. The reexpression of Rap1GAP also inhibited DNA synthesis and anchorage-independent proliferation. Conversely, eliminating Rap1GAP expression in rat thyroid cells induced a transient increase in cell number. Strikingly, Rap1GAP expression was abolished by Ras transformation. The downregulation of Rap1GAP by Ras required the …

Models Of Interdisciplinary Research And Service Learning At Hope College, Aaron A. Best, Matthew Dejongh, Amanda J. Barton, Jeff R. Brown, Christopher C. Barney

Publications

"Children love to explore the world around them. In doing so they are not aware of disciplinary boundaries or even of disciplines. They move freely from watching ants (biology) to building structures (engineering) to counting rocks (mathematics and geology) to seeing what things dissolve in water (chemistry). Only as they go to school do they learn that humans divide up the way we learn about the universe and start to think within disciplinary boundaries. In doing so, those children, who are now us, lose the ability to think broadly and use the insights of various ways of thinking to solve …

Gap-Based Estimation: Choosing The Smoothing Parameters For Probabilistic And General Regression Neural Networks, Mingyu Zhong, Dave Coggeshall, Ehsan Ghaneie, Thomas Pope, Mark Rivera, Michael Georgiopoulos, Georgios C. Anagnostopoulos, Mansooreh Mollaghasemi, Samuel Richie

Electrical Engineering and Computer Science Faculty Publications

Probabilistic neural networks (PNN) and general regression neural networks (GRNN) represent knowledge by simple but interpretable models that approximate the optimal classifier or predictor in the sense of expected value of the accuracy. These models require the specification of an important smoothing parameter, which is usually chosen by crossvalidation or clustering. In this article, we demonstrate the problems with the cross-validation and clustering approaches to specify the smoothing parameter, discuss the relationship between this parameter and some of © 2007 Massachusetts Institute of Technology the data statistics, and attempt to develop a fast approach to determine the optimal value of …

Fact Book 2007, Planning, Research, And Policy Analysis

Fact Book (1988-2019)

Fact Book 2007 for Illinois State University

Watered Down: The Intersection And Integration Of Tourism Development And Water Resource Management In Marrakech, Morocco, Alison Maassen

Independent Study Project (ISP) Collection

No abstract provided.

Implementing Uganda’S National Wetlands Policy: A Case Study Of Kabale District, Sophie Glass

Independent Study Project (ISP) Collection

Uganda’s “National Policy for the Conservation and Management of Wetland Resources” was launched in 1995 to promote the protection of Uganda’s wetlands in order to sustain their ecological and socioeconomic functions. Despite the formal policy, wetlands continue to be drained and converted. This report examines factors that account for the divide between the National Wetlands Policy and reality. Six weeks were spent researching the challenges associated with implementing the National Wetlands Policy. Kabale District was used as a case-study to better understand the issues that institutions and stakeholders face when trying to abide by the precepts of the policy. Rapid …

Distribution Of Ultraviolet-Absorbing Sunscreen Compounds Across The Body Surface Of Two Species Of Scaridae, Elizabeth Cerny-Chipman

Independent Study Project (ISP) Collection

Ultraviolet radiation has far-reaching effects in marine ecosystems, but many marine organisms have UV-absorbing compounds that protect them from sun-induced damage. The mucus of coral reef fish has been found to contain mycosporine-like amino acids that absorb UV light from 309-360 nm. Using UV spectrophotometry, we examined whether fish are able to allocate these MAA sunscreen compounds to areas of the body that receive the most UV radiation. We compared absorbance spectra of mucus from the body surface of dorsal, ventral, caudal and head areas in two species of Scaridae (Scarus schlegeli and Chlorurus sordidus) from Coral Bay, Western Australia. …

The Microcredit Impact: The Evaluation And Effects Of Microloans On Caboclos Communities Of The Tapajós River, Robert Chew

Independent Study Project (ISP) Collection

In 2002, Projeto Saúde e Alegria, an NGO dedicated to improving the health, education and socio-economic situation of rural caboclos communities of the greater Santarém region of Pará, began a microcredit program to facilitate the creation of alternative sources of income and poverty reduction within the communities. Three years later in 2005, the program was cancelled indefinitely due to low repayment rates. The following study attempts to identify and analyze what problems occurred within the microcredit program that led to the project’s eventual failure. Additionally, speculation into whether the program helped certain communities reduce poverty will also be investigated to …

Desarrollo Turístico Y Sustentabilidad: Caso Villa Pehuenia Y La Comunidad Mapuche Puel, Sasha Shahidi

Independent Study Project (ISP) Collection

With limited resources and overpopulation on a global level, sustainable development is the only way that human beings will be able to survive on this earth. The problem is that the dominant model of development stresses the importance of economic profits in the short term and far too often exploits natural resources and less powerful cultural groups. This creates dangerous long-term affects as natural resources and indigenous cultures that depend on them continue to disappear with no plan, or possibility, to replace them. Sustainability seeks the least negative impacts possible on the natural environment and indigenous cultures in order to …

2007-2009 Otterbein College Undergraduate Course Catalog, Otterbein University

Course Catalogs

No abstract provided.

2007-2009 Otterbein College Graduate Course Catalog, Otterbein University

Course Catalogs

No abstract provided.

Thin-Film Evolution Equation For A Strained Solid Film On A Deformable Substrate: Numerical Steady States, Wondimu T. Tekalign, Brian J. Spencer

Articles

We consider the nonlinear behavior of the thin-film evolution equation for a strained solid film on a substrate. The evolution equation describes morphological changes to the film by surface diffusion in response to elastic energy, surface energy, and wetting energy. Due to the thin-film approximation, the elastic response of the film is determined analytically, resulting in a self-contained evolution equation which does not require separate numerical solution of the full three-dimensional elasticity problem. Using a pseudospectral predictor-corrector method we numerically determine the family of steady state solutions to this evolution equation which correspond to quantum dot and quantum ridge morphologies.

Curriculum Integration: A Trial, Pat Grant, Kathy Paige

Australian Journal of Teacher Education

Curriculum integration and working in teams are two key characteristics of middle schooling in Australia today. As part of a new primary/middle teacher education program an interdisciplinary team of academics has developed a course that aims to teach pre service teachers how to plan for and teach an integrated curriculum unit in an authentic context: their 6 week school placement. This paper will describe the first cycle of an action research project detailing the issues for the third year pre service teachers and for the staff involved in teaching the course as they come to grips with new ways of …

Course Offerings, Fall 2007 [Difficult Dialogues], Clark University

Difficult Dialogues (2006-2013)

Difficult Dialogues course offerings for the Fall 2007 semester. While each semester's Difficult Dialogues programming centered around a theme, the initiative's course offerings covered a broader range of topic approaching the process of dialogues in a variety of ways and across a number of disciplines.

Clark University's Difficult Dialogues initiative was launched in 2006 and ran through 2013. The initiative aimed to raise awareness and develop skills of dialogue as a distinct approach to discourse, as well as encourage its practice among faculty, staff, and students.

Is Airline Passenger Profiling Necessary?, Timothy M. Ravich

University of Miami Law Review

No abstract provided.

The Constitutionality Of Open Space Requirements And Minimum Lot Sizes, Matthew Weiss

Land Use Clinic

The United States Supreme Court and other federal and state courts have consistently dismissed challenges against open space requirements and reductions in minimum lot sizes similar to those that exist within ordinances regulating conservation subdivisions. Although some precedent exists for finding open space requirements and minimum lot sizes unconstitutional, courts have only reached such conclusions in limited situations where the challenged regulations destroy the entire economic value of a plaintiff’s property, where there is no rational basis for the regulations, or where the land use regulation is found to substantially interfere with the property owner’s use and enjoyment of their …

Forecasting The Impacts Of Climate Change On Coastal Ecosystems: How Do We Integrate Science And Policy, Brian Helmuth

Southeastern Environmental Law Journal

No abstract provided.

ข่าวสิ่งแวดล้อม

Thai Environment

No abstract provided.

Patenting The Tax Code: Monopolizing Basic Tax Strategy, Nicholas Robinson

Buffalo Intellectual Property Law Journal

No abstract provided.

Utpa Stats At A Glance - Fall 2007, University Of Texas-Pan American

UTPA Archives - Stats At A Glance

No abstract provided.

Utpa Commencement – Fall 2007, University Of Texas-Pan American

Edinburg Archives - Legacy Commencement Programs

No abstract provided.

Los Arcos - Fall 2007, University Of Texas-Pan American

UTPA Archives - Los Arcos Magazine

No abstract provided.

What Shall We Do With All Of This Ground Water?, John Shomaker

Natural Resources Journal

No abstract provided.

South Dakota State University Spring 2008 Course Schedule Catalog, South Dakota State University

South Dakota State University Catalogs and Bulletins: 1935 to present

No abstract provided.

How Geometer’S Sketchpad Improves Student Learning, William George Awe

Mathematics Graduate Theses

This study investigated whether dynamic software improves learning and reviews different types of dynamic software. The study then narrows its focus to one type of dynamic software, Geometer’s Sketchpad and studies how Geometer’s Sketchpad, in itself, improves student learning. The researcher identified what dynamic software is, the importance of dynamic software and different types of dynamic software. The researcher also identifies how dynamic software is utilized in schools and researches how to improve the use of dynamic software in schools. Dynamic software, and Geometer’s Sketchpad, In particular, was found to improve learning across grade levels and with different levels of …

Thumbs Up To Undergraduate Research At Umw, Jack Bales

Administrative / Professional Faculty Articles

With newly minted college graduates flooding the job market or graduate schools, each one is naturally searching for an edge to stand out among the competition. According to Mary Washington students, UMW's Undergraduate Research Program is earning high marks for helping provide that edge.