Digital Commons Network^™

Exploring User-Provided Connectivity, Mohammad H. Afrasiabi, Roch Guerin

All Computer Science and Engineering Research

Network services often exhibit positive and negative externalities that affect users' adoption decisions. One such service is "user-provided connectivity" or UPC. The service offers an alternative to traditional infrastructure-based communication services by allowing users to share their "home base" connectivity with other users, thereby increasing their access to connectivity. More users mean more connectivity alternatives, i.e., a positive externality, but also greater odds of having to share one's own connectivity, i.e., a negative externality. The tug of war between positive and negative externalities together with the fact that they often depend not just on how many but also which users …

Range Of Horizontal Transport And Residence Time Of Nitrate In A Mature Karst Vadose Zone, Jiri Kamas, Jiri Bruthans, Helena Vysoka, Miroslav Kovařík

International Journal of Speleology

Nitrate concentrations in drips in Amaterska, Spolecnak, and Holstejnska caves situated below a 25 to 120 m thick vadose zone in the Moravian Karst, Central Europe were studied during several periods from 1992. Each cave runs below a land-use boundary between fertilized lands and forest, which enabled study of the range of horizontal components of nitrate transport in the vadose zone. Parts of the fertilized land were turned into grassland in 1998 and 2003, and the cave drips were sampled both prior and after the changes in land use. The mean residence time of nitrate is - 30 m thick …

Hairy Stalagmites, A New Biogenic Root Speleothem From Botswana, Gerhard C. Du Preez, Paolo Forti, Gerhard Jacobs, Anine Jordaan, Louwrens Tiedt

International Journal of Speleology

Ngamiland in northwestern Botswana hosts the Gcwihaba Caves which present unique subterranean environments and host speleothems never before recorded. Cave atmospheric conditions can be extreme with temperatures as high as 28°C and relative humidity nearing 99.9%. Within Dimapo and Diviner’s Caves peculiar root speleothems that we named ‘Hairy Stalagmites’ were found. These stalagmites are closely associated with the roots of Namaqua fig (Ficus cordata) trees that enter the cave environment in search of water. Pieces of broken stalagmites were sampled from Dimapo Cave for further investigations. Stereo and electron microscopy revealed that the Hairy Stalagmites consist of multiple …

High-Resolution Digital 3d Models Of Algar Do Penico Chamber: Limitations, Challenges, And Potential, Ivo Silvestre M.Sc., José I. Rodrigues Phd, Mauro Figueiredo Phd, Cristina Veiga-Pires Phd

International Journal of Speleology

The study of karst and its geomorphological structures is important for understanding the relationships between hydrology and climate over geological time. In that context, we conducted a terrestrial laser-scan survey to map geomorphological structures in the karst cave of Algar do Penico in southern Portugal. The point cloud data set obtained was used to generate 3D meshes with different levels of detail, allowing the limitations of mapping capabilities to be explored.

In addition to cave mapping, the study focuses on 3D-mesh analysis, including the development of two algorithms for determination of stalactite extremities and contour lines, and on the interactive …

A Hot Mess: Knowing Juliet Through Accidental Encounters In Popular Culture, Kirk Hendershott-Kraetzer

Selected Papers of the Ohio Valley Shakespeare Conference

No abstract provided.

Can You Solve The Navajo Sheep Problem?, Ohio University College Of Arts & Sciences

All Forum Articles

No abstract provided.

Singh Gets Faculty Award For Excellence In Global Engagement, Ohio University College Of Arts & Sciences

All Forum Articles

No abstract provided.

Personal Reflections / 11.25.14, José M. Torres

Personal Reflections

In this season of giving thanks and family celebrations, I want to take a moment to personally thank you for your dedication and continued commitment—and to express my gratitude to each of you for helping IMSA to accomplish so much this year.

It’s been a few weeks since my last personal reflection and I think today is a perfect day—at the start of this season of gratitude—to share my thoughts with you.

First, it has been an honor and a joy to serve as your President these past two months, ten weeks to be exact! During this time my Listening …

U.S. Drought Monitor, November 25, 2014, Eric Luebehusen

United States Agricultural Commodities in Drought Archive

Drought map of U.S. for November 25, 2014 (11/25/14) plus: U.S. crop areas experiencing drought (map), Approximate percentage of crop located in drought, by state (bar graph), Percent of crop area located in drought, past 52 weeks (line graph) for: Corn, Soybeans, Hay, Cattle, Winter wheat.

Empirical Formulas For Direct Double Ionization By Bare Ions: Z=-1 To 92, Robert D. Dubois, A. C.F. Santos, S. T. Manson

Physics Faculty Research & Creative Works

Experimental cross sections and cross-section ratios reported in the literature for direct double ionization of the outer shells of helium, neon, and argon atoms resulting from bare ions ranging from protons to uranium and for antiprotons are analyzed in terms of a first- and second-order interference model originally proposed by McGuire [J. H. McGuire, Phys. Rev. Lett. 49, 1153 (1982) PRLTAO0031-900710.1103/PhysRevLett.49.1153]. Empirical formulas for the various contributions to double ionization plus information about the phase difference between the first- and second-order mechanisms are extracted from the data. Projectile and target scaling's are also extracted. Total cross sections and their ratios …

Catechol Oxidation By Ozone And Hydroxyl Radicals At The Air-Water Interface, Elizabeth A. Pillar, Robert C. Camm, Marcelo I. Guzman

Chemistry Faculty Publications

Anthropogenic emissions of aromatic hydrocarbons promptly react with hydroxyl radicals undergoing oxidation to form phenols and polyphenols (e.g., catechol) typically identified in the complex mixture of humic-like substances (HULIS). Because further processing of polyphenols in secondary organic aerosols (SOA) can continue mediated by a mechanism of ozonolysis at interfaces, a better understanding about how these reactions proceed at the air–water interface is needed. This work shows how catechol, a molecular probe of the oxygenated aromatic hydrocarbons present in SOA, can contribute interfacial reactive species that enhance the production of HULIS under atmospheric conditions. Reactive semiquinone radicals are quickly produced upon …

Upward Flow Constructed Wetland For Treatment Of Water Contaminated With Chlorinated Aliphatics, Michael Shelley, Abinash Agrawal, Ke Qin, Garrett Struckhoff, Carl Enfield, James Waldron, Christina Powell

AFIT Patents

An improved upward flow constructed wetland cell for treatment of water contaminated with chlorinated aliphatics is disclosed. The improvements include adding ammonia-oxidizing microorganisms to the methane-oxidizing microorganisms already present in an oxygenated root zone and adding improved pore-water sample chambers for measuring the performance of the constructed wetland cell.

Alexander V. Stibal Respondent's Brief Dckt. 41604

Idaho Supreme Court Records & Briefs, All

No abstract provided.

Executive Functioning In The Context Of Urban Poverty: An Examination Of Poverty Related Stress And Its Relationships To Academic Achievement, Jacquelyn L. Doxie

College of Science and Health Theses and Dissertations

Living in urban poverty has been linked to numerous negative conditions that disproportionately expose low-income urban youth and their families to severe and chronic stressors (Collins et al., 2010; DeNavas-Walt, Proctor, and Smith, 2012; Sznitman, Reisel, and Romer, 2011). Research has consistently shown a strong relationship between these stressors and numerous negative outcomes that can impact an adolescent emotionally, behaviorally, and academically (Conger et al., 2002). This dissertation is focused on the area of academic achievement, an outcome consistently found to be negatively impacted by poverty (Rouse and Fantuzzo, 2009). Based on Bronfenbrenner’s model of bio-ecological human development (Bronfenbrenner and …

Computational Investigation Of Potential Failure Modes In Arterial Hemodynamic Flowpath, Praveen Kumar Koya

Theses

The formation of an arterial disease for large and medium size vessels is believed to be a multifactorial interplay of bio - mechanical - chemical processes in the arterial wall and the hemodynamic flow path. The present research presents the viewpoint of a mechanical engineer assuming that mechanical factors are of the key importance in the formation of aneurism, atherosclerotic plague and rupture. The repetitive pressure and shear stresses exerted by the blood flow on the weakened arterial wall may cause its progressive degrade, resulting in aneurism with the following potential rupture. Elevated blood pressure results in an elevated repetitive …

Behavioral Measures Of Audibility As Indicators Of Hearing Aid Benefit, Bethany Lauren Burkeen

Student Theses and Dissertations

This study investigated the possibility of quantifying hearing aid benefit by means of the Audibility Index. The Audibility Index (AI) is defined as the amount of the audible speech spectrum available to a listener. Twenty-one participants with bilateral sensorineural hearing losses, each required to wear bilateral hearing aids, were recruited for this study. Utilizing FM tone stimuli, audiometric thresholds were established for each individual conventionally under earphones for the right and left ears, unaided in a sound field, and aided in a sound field. The thresholds were placed on a count-the-dot audiogram in order to calculate AIs for each individual. …

Making Telework Work: The Effect Of Telecommuting Intensity On Employee Work Outcomes, Maria Spilker

Dissertations

The current study examined the effects of telecommuting intensity – the amount of scheduled time that employees spend doing work away from the central work location – on employee outcomes. Results of this study provided insight into how telecommuting intensity relates to turnover intent and supervisor-rated performance through mediating mechanisms of work-life conflict, professional isolation, and Leader-Member Exchange. An online survey instrument was created, and an invitation to participate was sent by e-mail to telecommuters. Each participant was asked to provide an email address for his or her direct supervisor. The supervisor was asked to complete a shortened version of …

Neural Network Dynamic Progamming Constrained Control Of Distributed Parameter Systems Governed By Parabolic Partial Differential Equations With Application To Diffusion-Reaction Processes, Behzad Talaei, Hao Xu, S. Jagannathan

Electrical and Computer Engineering Faculty Research & Creative Works

In this paper, a novel neural network (NN) adaptive dynamic programming (ADP) control scheme for distributed parameter systems (DPS) governed by parabolic partial differential equations (PDE) is introduced in the presence of control constraints and unknown system dynamics. First, Galerkin method is utilized to develop a relevant reduced order system which captures the dominant dynamics of the DPS. Subsequently, a novel control scheme is proposed over finite horizon by using NN ADP. To relax the requirement of system dynamics, a novel NN identifier is developed. More-over, a second NN is proposed to estimate online the time-varying non-quadratic value function from …

The First Month Of Evolution Of The Slow-Rising Type Iip Sn 2013ej In M74, S. Valenti, D. Sand, A. Pastorello, M. L. Graham, D. A. Howell, J. T. Parrent

Dartmouth Scholarship

We present early photometric and spectroscopic observations of SN 2013ej, a bright Type IIP supernova (SN) in M74. SN 2013ej is one of the closest SNe ever discovered. The available archive images and the early discovery help to constrain the nature of its progenitor. The earliest detection of this explosion was on 2013 July 24.125 ut and our spectroscopic monitoring with the FLOYDS spectrographs began on July 27.7 ut, continuing almost daily for two weeks. Daily optical photometric monitoring was achieved with the 1 m telescopes of the Las Cumbres Observatory Global Telescope (LCOGT) network, and was complemented by UV …

Students’ Perceptions Of And Responses To Teaching Assistant And Peer Feedback, Kelsey J. Rodgers, Aladar K. Horvath, Hyunyi Jung, Amanda S. Fry, Heidi Diefes-Dux, Monica E. Cardella

Interdisciplinary Journal of Problem-Based Learning

Authentic open-ended problems are increasingly appearing in university classrooms at all levels. Formative feedback that leads to learning and improved student work products is a challenge, particularly in large enrollment courses. This is a case study of one first-year engineering student team’s experience with teaching assistant and peer feedback during a series of open-ended mathematical modeling problems called Model-Eliciting Activities. The goal of this study was to gain deep insight into the interactions between students, feedback providers, and written feedback by examining one team’s perceptions of the feedback they received and the changes they made to their solutions based on …

An Analysis Of Hybrid Energy System: A Case Study, Yading Yang

Morehead State Theses and Dissertations

A Thesis Presented to the Faculty of the College of Science and Technology Morehead State University in Partial Fulfillment of the Requirements for the Degree Master of Science by Yading Yang on November 24, 2014.

Quantifying An Adherence Path-Specific Effect Of Antiretroviral Therapy In The Nigeria Pepfar Program, Caleb Miles, Ilya Shpitser, Phyllis Kanki, Seema Meloni, Eric J. Tchetgen Tchetgen

Harvard University Biostatistics Working Paper Series

No abstract provided.

On The Restricted Mean Survival Time Curve Survival Analysis, Lihui Zhao, Brian Claggett, Lu Tian, Hajime Uno, Marc A. Pfeffer, Scott D. Solomon, Lorenzo Trippa, L. J. Wei

Harvard University Biostatistics Working Paper Series

No abstract provided.

Math Senior Seminar: Solutions & Their Bounds For The Traveling Salesman Problem, Nov. 24, Ohio University College Of Arts & Sciences

All Forum Articles

No abstract provided.

Columbia Chronicle (11/24/2014), Columbia College Chicago

Columbia Chronicle

Student newspaper from November 24, 2014 entitled The Columbia Chronicle. This issue is 40 pages and is listed as Volume 50, Number 13. Cover story: "Course reductions unite LGBTQ community" Editor-in-Chief: Tyler Eagle

Ferroelectric Tunnel Junctions With Graphene Electrodes, Haidong Lu, Alexey Lipatov, Sangjin Ryu, D. J. Kim, H. Lee, M. Ye. Zhuravlev, Chang-Beom Eom, Evgeny Y. Tsymbal, Alexander Sinitskii, Alexei Gruverman

Evgeny Tsymbal Publications

Polarization-driven resistive switching in ferroelectric tunnel junctions (FTJs)—structures composed of two electrodes separated by an ultrathin ferroelectric barrier—offers new physics and materials functionalities, as well as exciting opportunities for the next generation of non-volatile memories and logic devices. Performance of FTJs is highly sensitive to the electrical boundary conditions, which can be controlled by electrode material and/or interface engineering. Here, we demonstrate the use of graphene as electrodes in FTJs that allows control of interface properties for significant enhancement of device performance. Ferroelectric polarization stability and resistive switching are strongly affected by a molecular layer at the graphene/BaTiO₃ interface. …

A Review Of Software For Analyzing Molecular Sequences, Haema Nilakanta, Kimberly L. Drews, Suzanne Firrell, Mary A. Foulkes, Kathleen A. Jablonski

GW Biostatistics Center

Background Over the past ten years, there has been an explosion of microbiome research. Many software packages for analyzing microbial sequences such as the 16S gene from 454 sequencers and Illumina platforms are available. But for a new researcher, it is difficult to know which package to choose. We present a systematic review of packages for the analysis of molecular sequences used to describe and compare microbial communities. This review gives students and researchers information to help choose the best analytic pipeline for their project. To the best of our knowledge, this is the first review of such software.

Findings …

Braincheck - A Very Brief Tool To Detect Incipient Cognitive Decline: Optimized Case-Finding Combining Patient- And Informant-Based Data, Michael M. Ehrensperger, Kirstein I. Taylor, Manfred Berres, Nancy S. Foldi, Myriam Dellenbach, Irene Bopp, Gabriel Gold, Armin Von Gunten, Daniel Inglin, René Müri, Reto W. Kressig, Andreas U. Monsch

Publications and Research

Introduction Optimal identification of subtle cognitive impairment in the primary care setting requires a very brief tool combining (a) patients- subjective impairments, (b) cognitive testing, and (c) information from informants. The present study developed a new, very quick and easily administered case-finding tool combining these assessments ('BrainCheck') and tested the feasibility and validity of this instrument in two independent studies.

Methods We developed a case-finding tool comprised of patient-directed (a) questions about memory and depression and (b) clock drawing, and (c) the informant-directed 7-item version of the Informant Questionnaire on Cognitive Decline in the Elderly (IQCODE). Feasibility study: 52 general …

Whalesong 2014-11-24, N/A N/A

Whalesong

No abstract provided.

The Bg News November 24, 2014, Bowling Green State University

BG News (Student Newspaper)

The BGSU campus student newspaper. November 24, 2014. Volume 94-Issue 40.