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Charge Saturation And Neutral Substitutions In Halomethanes And Their Group 14 Analogues, Bernard K. Wittmaack, Chad Crigger, Matthew Guarino, Kelling J. Donald 2011 University of Richmond

Charge Saturation And Neutral Substitutions In Halomethanes And Their Group 14 Analogues, Bernard K. Wittmaack, Chad Crigger, Matthew Guarino, Kelling J. Donald

Chemistry Faculty Publications

A computational analysis of the charge distribution in halomethanes and their heavy analogues (MH4-nXn: M= C, Si, Ge, Sn, Pb; X = F, Cl, Br, I) as a function of n uncovers a previously unidentified saturation limit for fluorides when M ≠ C. We examine the electron densities obtained at the CCSD, MP2(full), B3PW91, and HF levels of theory for 80 molecules for four different basis sets. A previously observed substituent independent charge at F in fluoromethanes is shown to be a move toward saturation that is restricted by the low polarizability of C. This limitation fades into ...


Stabilizing Carbon-Lithium Stars, Nancy Perez-Peralta, Maryel Contreras, William Tiznado, John Stewart, Kelling J. Donald, Gabriel Merino 2011 University of Richmond

Stabilizing Carbon-Lithium Stars, Nancy Perez-Peralta, Maryel Contreras, William Tiznado, John Stewart, Kelling J. Donald, Gabriel Merino

Chemistry Faculty Publications

We have explored in silico the potential energy surfaces of the C5Linn-6 (n = 5, 6, and 7) clusters using the Gradient Embedded Genetic Algorithm (GEGA) and other computational strategies. The most stable forms of C5Li5-- and C5Li6 are two carbon chains linked by two lithium atoms in a persistent seven membered ring capped by two Li atoms. The other Li atoms are arrayed on the edge of the seven membered ring. In contrast, the global minimum structure for C5Li7+ is a bicapped star of D5h symmetry ...


Ace-Fts Measurements Of Trace Species In The Characterization Of Biomass Burning Plumes, K. A. Tereszchuk, G. González Abad, C. Clerbaux, D. Hurtmans, P.-F. Coheur, P. F. Bernath 2011 Old Dominion University

Ace-Fts Measurements Of Trace Species In The Characterization Of Biomass Burning Plumes, K. A. Tereszchuk, G. González Abad, C. Clerbaux, D. Hurtmans, P.-F. Coheur, P. F. Bernath

Chemistry & Biochemistry Faculty Publications

To further our understanding of the effects of biomass burning emissions on atmospheric composition, we report measurements of trace species in biomass burning plumes made by the Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS) instrument on the SCISAT-1 satellite. An extensive set of 15 molecules, C2H2, C2H6, CH3OH, CH4, CO, H2CO, HCN, HCOOH, HNO3, NO, NO2, N2O5, O-3, OCS and SF6 are used in our analysis. Even though most biomass burning smoke is typically confined to the boundary layer, some of these emissions ...


Modification Of Turbulence At The Air-Sea Interface Due To The Presence Of Surfactants And Implications For Gas Exchange. Part Ii: Numerical Simulations, Silvia Matt, Atsushi Fujimara, Alexander Soloviev, Shin Hyung Rhee 2011 Nova Southeastern University

Modification Of Turbulence At The Air-Sea Interface Due To The Presence Of Surfactants And Implications For Gas Exchange. Part Ii: Numerical Simulations, Silvia Matt, Atsushi Fujimara, Alexander Soloviev, Shin Hyung Rhee

Oceanography Faculty Books and Book Chapters

We conducted high-resolution non-hydrostatic numerical simulations to study the effect of surfactants on near-surface turbulence. Laboratory experiments at the UM RSMAS ASIST facility presented in a companion paper report a reduction of turbulence below the air-sea interface and an increase of the surface drift velocity in the presence of surfactants. We implement the effect of surfactants as a rheological, viscoelastic boundary condition at the surface. Our numerical experiments are consistent with the results of the laboratory experiments. We also simulated the effect of surfactants on the temperature difference across the thermal molecular sublayer (cool skin) and on gas transfer velocity ...


Buffernomics: Assessing Willingness To Pay For Lake Conservation On North Pond And East Pond, Sophie D. Sarkar 2011 Colby College

Buffernomics: Assessing Willingness To Pay For Lake Conservation On North Pond And East Pond, Sophie D. Sarkar

Honors Theses

Hedonic property valuations in Maine have estimated that a one-meter decrease in water clarity can reduce shoreline property values by 4 to 16%. To avoid a loss on their lakefront investment, shoreline property owners have a particularly large incentive to conserve lake water quality. Nevertheless, while some shoreline residents voluntarily install vegetated buffers and actively participate in lake stewardship, others continue to ignore shoreline zoning laws at the expense of lake health. In this thesis, I examine the dichotomy of active and indifferent shoreline residents by analyzing the motivations that distinguish residents who are willing to pay (WTP) for and ...


Biomass Energy At Colby College, Rachel E. Baron 2011 Colby College

Biomass Energy At Colby College, Rachel E. Baron

Honors Theses

In light of growing concern regarding the effects of global climate change, Colby College signed the American College and University Presidents’ Climate Commitment (ACUPCC) in 2008. Through this pledge, Colby has committed to reducing carbon emissions in its Climate Action Plan (IPCC 2007; CCAP 2010). The College seeks to be carbon neutral by 2015 (CCAP 2010). This will be accomplished through a variety of mechanisms, one of which includes the construction of a biomass facility to replace most of the oil currently used for heating (CCAP 2010).

Anthropogenic global climate change has been documented by many scientists, but was widely ...


Making Algebra More Accessible: How Steep Can It Be For Teachers?, Diana Cheng, Polina Sabinin 2011 Towson University

Making Algebra More Accessible: How Steep Can It Be For Teachers?, Diana Cheng, Polina Sabinin

Mathematics Faculty Publications

Teacher educators need to support middle grades teachers in developing mathematical knowledge for teaching algebraic concepts. In particular, teachers should become familiar with possible introductions and sequencing to the concept of slope, and common middle school students’ limited conceptions about measuring the steepness of an incline. Steepness can be expressed directly in terms of an angle or indirectly as a slope. Encouraging middle school students to find a measure of steepness using a ratio may help support students’ transition to multiplicative thinking. This mixed – methods study explores middle school students’ responses in solving a comparison problem involving the steepness of ...


Testing The Mean For Business Data: Should One Use The Z-Test, T-Test, F-Test, The Chi-Square Test, Or The P-Value Method?, Jiajuan (John) Liang, William S. Pan 2011 University of New Haven

Testing The Mean For Business Data: Should One Use The Z-Test, T-Test, F-Test, The Chi-Square Test, Or The P-Value Method?, Jiajuan (John) Liang, William S. Pan

Marketing and Quantitative Analysis Faculty Publications

Purpose – The overall purpose of this research is to discuss the relationship among the tests for population mean that are taught in the Business Statistics course for business majors. Design/methodology/approach – The approach to this study is to describe the types of business data according to one-sample, two-sample, and multi-sample cases first and then combine tests for categorical data with tests for continuous data into a unified format on testing the mean of a population. Under this unified format, we summarize the methodology on the topic of testing the mean in business statistics course. Findings – One of the important ...


Discrete-Time Recurrent Neural Network And Its Application To Compression Of Infra-Red Spectrum, Leong-Kwan Li, Sally S. L. Shao 2011 Hong Kong Polytechnic University

Discrete-Time Recurrent Neural Network And Its Application To Compression Of Infra-Red Spectrum, Leong-Kwan Li, Sally S. L. Shao

Mathematics Faculty Publications

We study the discrete-time recurrent neural network that derived from the Leaky-integrator model and its application to compression of infra-red spec- trum. Our results show that the discrete-time Leaky-integrator recurrent neural network (RNN) model can be used to approximate the continuous-time model and inherit its dynamical characters if a proper step size is chosen. Moreover, the discrete-time Leaky-integrator RNN model is absolutely stable. By developing the double discrete integral method and employing the state space search algorithm for the discrete-time recurrent neural network model, we demonstrate with quality spectra regenerated from the compressed data how to compress the infra-red spectrum ...


Privacy-Preserving Pki Design Based On Group Signature, Sokjoon Lee, Hyeok Chan Kwon, Dong-il Seo 2011 ETRI, Daejeon, Korea

Privacy-Preserving Pki Design Based On Group Signature, Sokjoon Lee, Hyeok Chan Kwon, Dong-Il Seo

Australian Information Security Management Conference

Nowadays, Internet becomes a part of our life. We can make use of numerous services with personal computer, Lap-top, tablet, smart phone or smart TV. These devices with network make us enjoy ubiquitous computing life. Sometimes, on-line services request us authentication or identification for access control and authorization, and PKI technology is widely used because of its security. However the possibility of privacy invasion will increase, if We’re identified with same certificate in many services and these identification data are accumulated. For privacy-preserving authentication or anonymous authentication, there have been many researches such as Group signatures, anonymous credentials, etc ...


Redox-Active Liposome Delivery Agents With Highly Controllable Stimuli-Responsive Behavior, Nicole Hollabaugh Carrier 2011 Louisiana State University and Agricultural and Mechanical College

Redox-Active Liposome Delivery Agents With Highly Controllable Stimuli-Responsive Behavior, Nicole Hollabaugh Carrier

LSU Doctoral Dissertations

Over the last few decades, liposomes have generated a lot of interest as drug delivery vehicles to address the need for providing both increased therapeutic efficacy and decreased systemic exposure, simultaneously. The challenge of increasing drug accumulation at diseased sites, without compromising the integrity and stability of the liposomal carrier during circulation, has been met with two possible solutions: (1) active targeting and (2) active triggering. To achieve selective and site-specific delivery of drugs to tumors, active triggering methods have been developed wherein a responsive element is incorporated into the liposomal bilayer, which causes destabilization of the liposome upon exposure ...


Insecurity By Obscurity Continues: Are Adsl Router Manuals Putting End-Users At Risk, Kim Andersson, Patryck Szewczyk 2011 Edith Cowan University

Insecurity By Obscurity Continues: Are Adsl Router Manuals Putting End-Users At Risk, Kim Andersson, Patryck Szewczyk

Australian Information Security Management Conference

The quantity and sophistication of threats targeting ADSL routers is on a steady increase. There is a reliance on end-users to ensure that their ADSL router is secure by continually updating the firmware, using strong authentication credentials, and enabling the in-built firewall. However, to do this, the end-user must be presented with well written procedural instructions, and an explanation of why this is important. This paper examines the design quality and security content provided by vendors in ADSL router manuals. This paper reveals that the lack of security related content and poor overall design could impact on end-users’ interpretation and ...


Human-Related Information Security Problems Faced By British Companies In Economically Rising Countries, Suchinthi Fernando, Tatsuo Asai 2011 Nagaoka University of Technology, Japan

Human-Related Information Security Problems Faced By British Companies In Economically Rising Countries, Suchinthi Fernando, Tatsuo Asai

Australian Information Security Management Conference

In some cases, global businesses expansion leads to human-related problems due to cultural differences between investor countries and investee countries. This study focuses on such problems in the area of information security. Potential problems which British companies may face in rising economies are discussed here. Russia, India and China, where UK is one of the key investors, are examined. Potential problems were developed by using Hofstede’s framework of culture and the recently proposed theory of Level of Potential (LoP) was adopted to predict their magnitudes. Three online surveys were conducted in Russia, India and China to evaluate the severity ...


Efficient And Expressive Fully Secure Attribute-Based Signature In The Standard Model, Piyi Yang, Tanveer A. Zia, Zhenfu Cao, Xiaolei Dong 2011 University of Shanghai for Science and Technology

Efficient And Expressive Fully Secure Attribute-Based Signature In The Standard Model, Piyi Yang, Tanveer A. Zia, Zhenfu Cao, Xiaolei Dong

Australian Information Security Management Conference

Designing a fully secure (adaptive-predicate unforgeable and perfectly private) attribute-based signature (ABS), which allows a signer to choose a set of attributes in stead of a single string representing the signer‘s identity, under standard cryptographic assumption in the standard model is a challenging problem. Existing schemes are either too complicated or only proved in the generic group model. In this paper, we present an efficient fully secure ABS scheme in the standard model based on q-parallel BDHE assumption which is more practical than the generic group model used in the previous scheme. To the best of our knowledge, our ...


A Preliminary Investigation Of Distributed And Cooperative User Authentication, C G. Hocking, S M. Furnell, N L. Clarke, P L. Reynolds 2011 Plymouth University, UK

A Preliminary Investigation Of Distributed And Cooperative User Authentication, C G. Hocking, S M. Furnell, N L. Clarke, P L. Reynolds

Australian Information Security Management Conference

Smartphones and other highly mobile yet sophisticated technologies are rapidly spreading through society and increasingly finding their way into pockets and handbags. As reliance upon these intensifies and familiarity grows, human nature dictates that more and more personal details and information is now to be found upon such devices. The need to secure and protect this valuable and desirable information is becoming ever more prevalent. Building upon previous work which proposed a novel approach to user authentication, an Authentication Aura, this paper investigates the latent security potential contained in surrounding devices in everyday life. An experiment has been undertaken to ...


Semi-Direct Galois Covers Of The Affine Line, Linda Gruendken, Laura L. Hall-Seelig, Bo-Hae Im, Ekin Ozman, Rachel Pries, Katherine Stevenson 2011 Merrimack College

Semi-Direct Galois Covers Of The Affine Line, Linda Gruendken, Laura L. Hall-Seelig, Bo-Hae Im, Ekin Ozman, Rachel Pries, Katherine Stevenson

Mathematics Faculty Publications

Let k be an algebraically closed field of characteristic p > 0. Let G be a semi-direct product of the form (Z/`Z) b o Z/pZ where b is a positive integer and ` is a prime distinct from p. In this paper, we study Galois covers ψ : Z → P 1 k ramified only over ∞ with Galois group G. We find the minimal genus of a curve Z which admits a covering map of this form and we give an explicit formula for this genus in terms of ` and p. The minimal genus occurs when b equals the order a of ...


River Otter (Lontra Canadensis) Use Of Phragmites Australis And Density Estimation Using Genetic Techniques, Amy R. Williams 2011 University of Nebraska-Lincoln

River Otter (Lontra Canadensis) Use Of Phragmites Australis And Density Estimation Using Genetic Techniques, Amy R. Williams

Dissertations & Theses in Natural Resources

River otters were extirpated in Nebraska in the early 1900’s. In 1986 Nebraska Game and Parks Commission began reintroducing otters. In support of developing an otter management plan, I conducted research on two aspects of otter ecology in Nebraska. First, I examined otter use of habitats dominated by the non–native aquatic plant, Phragmites australis, in the Big Bend reach of the Platte River. Sixteen otters were trapped, radio–tagged, and tracked between 2006 and 2009. I identified 517 den/resting locations, 127 of which were unique locations. I compared den/resting site habitat use to availability to determine ...


Herschel Observations Of The Centaurus Oluster - The Dynamics Of Cold Gas In A Cool Core, R. Mittal, C. P. O'Dea, Gary J. Ferland, J. B. R. Oonk, A. C. Edge, R. E. A. Canning, H. Russell, S. A. Baum, H. Böhringer, F. Combes, M. Donahue, A. C. Fabian, N. A. Hatch, A. Hoffer, R. Johnstone, B. R. McNamara, P. Salomé, G. Tremblay 2011 Rochester Institute of Technology

Herschel Observations Of The Centaurus Oluster - The Dynamics Of Cold Gas In A Cool Core, R. Mittal, C. P. O'Dea, Gary J. Ferland, J. B. R. Oonk, A. C. Edge, R. E. A. Canning, H. Russell, S. A. Baum, H. Böhringer, F. Combes, M. Donahue, A. C. Fabian, N. A. Hatch, A. Hoffer, R. Johnstone, B. R. Mcnamara, P. Salomé, G. Tremblay

Physics and Astronomy Faculty Publications

Brightest cluster galaxies (BCGs) in the cores of galaxy clusters have distinctly different properties from other low-redshift massive ellipticals. The majority of the BCGs in cool-core clusters show signs of active star formation. We present observations of NGC 4696, the BCG of the Centaurus galaxy cluster, at far-infrared (FIR) wavelengths with theHerschel space telescope. Using the PACS spectrometer, we detect the two strongest coolants of the interstellar medium, [C II] at 157.74 μm and [O I] at 63.18 μm, and in addition [N II] at 121.90 μm. The [C II] emission is extended over a region ...


A Deep Spectroscopic Study Of The Filamentary Nebulosity In Ngc 4696, The Brightest Cluster Galaxy In The Centaurus Cluster, R. E. A. Canning, A. C. Fabian, R. M. Johnstone, J. S. Sanders, C. S. Crawford, Gary J. Ferland, N. A. Hatch 2011 University of Cambridge, UK

A Deep Spectroscopic Study Of The Filamentary Nebulosity In Ngc 4696, The Brightest Cluster Galaxy In The Centaurus Cluster, R. E. A. Canning, A. C. Fabian, R. M. Johnstone, J. S. Sanders, C. S. Crawford, Gary J. Ferland, N. A. Hatch

Physics and Astronomy Faculty Publications

We present results of deep integral-field spectroscopy observations using high-resolution optical (4150–7200 Å) VLT VIsible MultiObject Spectrograph spectra of NGC 4696, the dominant galaxy in the Centaurus cluster (Abell 3526). After the Virgo cluster, this is the second nearest (z= 0.0104) example of a cool-core cluster. NGC 4696 is surrounded by a vast, luminous Hα emission-line nebula (L= 2.2 × 1040 erg s−1). We explore the origin and excitation of the emission-line filaments and find their origin consistent with being drawn out, under rising radio bubbles, into the intracluster medium as in other similar systems ...


Modification Of Turbulence At The Air-Sea Interface Due To The Presence Of Surfactants And Implications For Gas Exchange. Part I: Laboratory Experiment, Alexander Soloviev, S. Matt, Mikhail Gilman, H. Huhnerfuss, Brian K. Haus, D. Jeong, I. Savelyev, Mark A. Donelan 2011 Nova Southeastern University; University of Miami

Modification Of Turbulence At The Air-Sea Interface Due To The Presence Of Surfactants And Implications For Gas Exchange. Part I: Laboratory Experiment, Alexander Soloviev, S. Matt, Mikhail Gilman, H. Huhnerfuss, Brian K. Haus, D. Jeong, I. Savelyev, Mark A. Donelan

Oceanography Faculty Books and Book Chapters

The air-sea gas transfer of gases like CO2 is substantiallydetermined bythe properties of the aqueous diffusion sublayer and free-surface turbulent boundarylayer. Little is known about the effect of surfactants on turbulence in the near-surface layer of the ocean. In order to investigate the effect of surfactants on turbulent exchanges below the air-sea interface, we have conducted a series of laboratoryexperiments at the UM RSMAS Air-Sea Interaction Saltwater Tank (ASIST) facility. Results from these experiments demonstrate that the surfactant monolayer suppresses turbulence and reduces drag below the water surface and increases the surface drift velocity. This effect is important for parameterization ...


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