Physical Sciences and Mathematics Commons^™

Combined Mössbauer Spectral And Density Functional Theory Determination Of The Magnetic Easy-Axis In Two High-Spin Iron(Ii) 2-Pyrazinecarboxylate Complexes, Gary J. Long, Stefania Tanase, Françoise Remacle, Ganga Periyasamy, Fernande Grandjean

Chemistry Faculty Research & Creative Works

A combination of density functional theory (DFT) calculations and Mössbauer spectroscopy has been used to determine that the magnetic easy-axis is coincident with its crystallography c-axis in [Fe(pca) 2(py)2] · py, where pac is the 2- pyrazinecarboxylate ligand. This easy-axis bisects the approximately axial O-Fe-O coordination axes of molecules adjacent to each other along the c-axis. in {[Fe(pca)2(H₂O)]-H₂O) n the easy magnetic axis is not coincident with any of its crystallographic axes nor with the Fe-O(water) coordination axis, but is coincident with one of the Fe ... Fe axes in the crystal structure. the DFT calculations, …

Manipulating Self-Assembly In Silver(I) Complexes Of 1,3-Di-N-Pyrazolylorganyls, Brendan J. Liddle, Daniel Hall, Sergey V. Lindeman, Mark D. Smith, James R. Gardinier

Chemistry Faculty Research and Publications

Three di-N-pyrazolylorganyls with different conformational flexibilities in the three-atom organyl spacers have been prepared, and the self-assembly properties with AgBF₄ have been studied both in solution and in the solid state. All ligands give low-coordinate silver(I) centers that are capable of participating in multiple noncovalent interactions, but only the rigid 1,8-dipyrazolylnaphthalene ligand promotes very short Ag−Ag contacts.

Estimating Debye Parameters From Gpr Reflection Data Using Spectral Ratios, John H. Bradford

Geosciences Faculty Publications and Presentations

In the GPR frequency range, electromagnetic wave attenuation is largely controlled by dielectric relaxation processes. A primary relaxation commonly occurs in the 10 – 100 MHz range for many earth materials in which the GPR signal propagates effectively. This relaxation leads to strong nonlinearity in the frequency dependent attenuation and occurs in a frequency range that is often used for groundwater investigations. This non-linearity complicates data analysis but also may provide additional material property information. I investigate inversion for Debye relaxation parameters directly from GPR reflection data, including increasing the bandwidth of the signal by summing the response from 25 …

Towards Mineralogical And Geochemical Reference Groups For Some Bronze Age Ceramics 
From Transylvania (Romania), Volker Hoeck, Corina Ionescu, Lucretia Ghergari, Carmen Precup

Studia UBB Geologia

Based on their chemical composition ceramic shards from three Bronze Age sites in Transylvania, i.e., Copăceni, Derşida and Palatca respectively, were distinguished by major, trace, and RE elements. Within the Copăceni samples, two subgroups (A and B) showing different chemistry and mineralogy were additionally separated out. The link between chemistry and mineralogy showed clearly the important contribution of the temper to the overall chemistry of the ceramic shards. In turn, the chemistry facilitated the provenance study of the raw materials, which were collected in the vicinity of the sites. In combination with the mineralogy of the ceramics, the chemical analyses …

Soil-Plant Relationship Of Pteropyrum Olivieri, A Serpentine Flora Of Wadh, Balochistan, Pakistan And Its Use In Mineral Prospecting, Shahid Naseem, Erum Bashir, Khaula Shireen, Sheraz Shafiq

Studia UBB Geologia

Biogeochemical investigation of Pteropyrum olivieri, a flora of Wadh area in perspective of plant-soil-rock relationship has been made. It is a native of Irano-Turanian region which extended into Saharo-Sindian region of Pakistan. The distribution of P. olivieri and some other co-ecological flora in relation to lithology was also discussed. Field observations showed its controlled population on the serpentine soil. The average abundance of Mg and Ca in soil was estimated as 2.43% and 5.46 respectively. The Mg/Ca ratio of the soils of the study area was below unity (0.445), indicating pedogenesis from serpentinite. Quantitative estimation of Cr, Ni, Co and …

Gpr Detection Of Karst And Archaeological Targets Below The Historical Centre Of Merida, Yucatán, Mexico., Luis Barba, Jorge Blancas, Agustin Ortiz, Josep Ligorred

Studia UBB Geologia

The Historical Center of Merida has been classified as a “zone of high patrimonial value” based on the study of topography and the historical documents that show a long-term occupation, non-interrupted since pre-Columbian times when T’Hó was the great capital of the northern region of the Maya area.

For the local government, rehabilitation of the Historical Center of Merida has been a great priority. Among others, this project includes preservation of archaeological remains (pre-Columbian or colonial) and detection of karstic zones under the city. In order to prevent damage to the patrimony, ground penetrating radar (GPR) surveys were carried out …

Development And Usage Of Geosites: New Results From Research And Conservation Activities In The Piemonte Region (Italy), Luca Ghiraldi, Paola Coratza, Ermanno De Biaggi, Marco Giardino, Mauro Marchetti, Luigi Perotti

Studia UBB Geologia

This paper describes a series of activities carried out by public institutions, whose aim is to identify possible ways of acquiring knowledge and of allowing enjoyment of the Piemonte Region’s geological heritage. The activities concern the inventory, the evaluation, the storage and the publication of information, both alphanumerical and geographical, in relation to geosites. A database accessible directly from Web and a Web-GIS application has been developed in order to supply valuable and comprehensive instruments for both, representing the results of research and promoting the knowledge of the geological heritage to a large number of people.

Decaying Of The Marble And Limestone Monuments In The Urban Environment. Case Studies From Saint Petersburg, Russia, Olga V. Frank-Kamenetskaya, Dmitrii Yu Vlasov, Marina S. Zelenskaya, Irina V. Knauf, Maryia A. Timasheva

Studia UBB Geologia

The results of a long-lasting research of sulphation process, which causes an essential deterioration of marble and limestone monuments in Saint Petersburg are reported. Based on a variety of field and analytical methods we can show that the decay process forming a gypsum-rich patina depends mainly on the local environment, the moisture accumulation, and is connected with the fissuring and porosity of the rock and the relief of a monument. Three main stages of gypsum-rich patina formation in the presence of microorganisms were revealed.

Deterioration Of Carbonate Rocks Used For Archeological Monuments In Tauric Chersonesos (Crimea), Alexander V. Mosyagin, Irina V. Knauf, Marina S. Zelenskaya

Studia UBB Geologia

The paper presents the mineralogy and petrography of the Proconesian marble and Chersonesian limestone, used as building materials from Antiquity to the medieval times in the Tauric Chersonesos, Crimea. The deterioration process, due to the modern time’s pollution and the climatic factors, is represented by forming of mainly gypsum-rich patina. The ubiquitous presence of micromycetes favors the stone decay.

Assessment Of Geohazards And Management Of Their Possible Impacts In The Kurbini Region, Albania, Arjan Beqiraj, Fran Gjoka, Mentor Lamaj, Majlinda Cenameri

Studia UBB Geologia

The small region of Kurbini, situated in the north western part of Albania, faces various hazards, due to the particular geographical position marked by the close neighbourhood of the high mountains and the Adriatic Sea. The hydrological and hydrogeological hazards, the deterioration of the groundwater quality, the intense erosion of the soil, the local acidification/contamination/salinization of the soil, and the desertification of land, are the most important geohazards threatening the area. A complex monitoring of all identified risk factors is necessary in order to avoid catastrophic events and irreversible damages.

Contrasting Recipes For The Kiln Furnitures Of The Faience Manufacture Granges-Le-Bourg (Haute Saône, France), Marino Maggetti, Denis Morin, Vincent Serneels, Christoph Neururer

Studia UBB Geologia

Thirty-nine samples of kiln furniture or technical ceramic (firing plate, saggars, spacers, props, wads) and six samples of building ceramics (bricks, tiles) from the manufacture of Granges-le-Bourg were studied by optical microscopy, X-ray fluorescence, X-ray diffraction and scanning electron microscopy. The kiln furniture is chemically inhomogeneous and belong to a CaO- + MgO-poor (firing plate, saggars) or a CaO- + MgO-rich (props, spacers, wads) group. Bricks and tiles pertain to the first group which was manufactured using decarbonatized top layers of local Triassic dolomitic marls. For the second group, the deeper layers were used. Plate and saggars are covered with …

Color As A Source Of Brand Differentiation: Can It Be Defended?, Byron W. Keating, T. R. Coltman

Dr Byron W. Keating

Savvy marketers have long sought to exploit the psychological effects of color to differentiate their brands and create competitive advantage: IBM Blue, Coca- Cola Red, and BP Green. These are not new colors but well-known brand colors. While changes in international trademark law over the past decade paved the way for marketers to seek protection for a color associated with a brand, this case demonstrates some important challenges in defending such trademarks.

In Pursuit Of A Sustainable Supply Chain: Insights From Westpac Banking Corporation, Byron Keating, Ali Quazi, Anton Kriz, Tim Coltman

Dr Byron W. Keating

Purpose – The aim of this paper is to provide clues to industry and academia on how best to approach the challenge of developing a sustainable supply chain. Design/methodology/approach – A case study was undertaken of the Westpac Banking Corporation – one of the world's most socially responsible banks – to examine how they approached the challenge of managing corporate social responsibility (CSR) in their supply chain. Findings – This paper highlights some of the challenges and opportunities associated with extending corporate governance beyond the firm boundary. Specific attention is given to a discussion of assessment and governance tools. Research …

Outbound Tourism From China: Literature Review And Research Agenda, Byron W. Keating, A. Kriz

Dr Byron W. Keating

The rapid growth of China's outbound tourism market has attracted a great deal of attention in recent years. However, the academic literature is still sparse in this area. Using a theoretical framework that synthesises the key processes related to destination choice, the authors undertake a systematic review of the academic literature on outbound tourism from China. Stemming from this review, the article provides some direction for future empirical research on this important topic. The authors also suggest that a new model for travel planning could be developed, suggesting that traditional destination choice models may inadequately capture the nuances of destination …

Unpacking The Rfid Investment Decision, Byron W. Keating, Tim R. Coltman, Samuel Fosso Wamba, Valerie Baker

Dr Byron W. Keating

Mandates aside, there are many reasons why firms decide to move forward with or delay investment in RFID technology. In this paper we use a theoretically based, easy to implement methodology to empirically derive a relative importance scale of those factors that influence the decision to invest in RFID technology. More specifically, we compare the factors that matter most and least to a sample of firms that have adopted RFID technology with a sample of firms that have yet to embrace RFID technology. The theoretical and practical implications are that both RFID adopters and non adopters are driven by the …

A Non-Thermal Wimp Miracle, Scott Watson, Bobby Samir Acharya, Gordon Kane, Piyush Kumar

Physics - All Scholarship

Light scalar fields with only gravitational strength couplings are typically present in UV complete theories of physics beyond the Standard Model. In the early universe it is natural for these fields to dominate the energy density, and their subsequent decay, if prior to BBN, will typically yield some dark matter particles in their decay products. In this paper we make the observation that a Non-thermal WIMP `Miracle' may result: that is, in the simplest solution to the cosmological moduli problem, non-thermally produced WIMPs can naturally account for the observed dark matter relic density. Such a solution may be generic in …

Multimodal Drug Delivery Using Gold Nanoparticles, Ck Kim, P Ghosh, Vm Rotello

Vincent Rotello

Gold nanoparticles (AuNPs) are promising nanocarriers for therapeutics due to their facile synthesis, ease of functionalization, biocompatibility, and inherent non-toxicity. The unique chemical and physical properties of AuNP monolayers provide versatility in delivery method and tunability of surface properties. Here, we discuss several strategies to utilize the properties of AuNPs for drug delivery.

Homomorphic Encryption Based K-Out-Of-N Oblivious Transfer Protocols, Mummoorthy Murugesan, Wei Jiang, Erhan Nergiz, Serkan Uzunbaz

Department of Computer Science Technical Reports

No abstract provided.

Spectroscopic Investigation Of The Anatase-To-Rutile Transformation Of Sol-Gel Synthesised Tio2 Photocatalysts, Nicholas Nolan, Suresh Pillai, Michael Seery

Articles

Among the three major phases in titania, anatase is reported to be a better photocatalytically active phase. Anatase to rutile transformations, under normal conditions, usually occurs at a temperatue range of 600- 700 °C. Various chemical additives have previously been employed to extend the anatase transition to higher temperatures. Effect of employing various concentrations of formic acid and water on phase transition has systematically been studied by XRD, FTIR and Raman spectroscopy. A considerably higher anatase phase (41%) has been obtained at 800 ºC and 10% anatase composition is retained after annealing the materials at 900 ºC for the optimised …

Complete Findings: Survey On Public Opinions And Attitudes On Outdoor Recreation In California: 2009, Arnold Schwarzeneggar, Mike Chrisman, Ruth Coleman, William W. Hendricks

Natural Resources Management and Environmental Sciences

A Statewide Comprehensive Outdoor Recreation Plan (SCORP) is required of every state in order to be eligible for grants from the Land and Water Conservation Fund Act. The LWCF Act requires the SCORP to include the following: a) the name of the state agency with authority to act for California in dealing with the Secretary of the Interior for the purposes of the LWCF Act, b) an evaluation of the demand for and supply of the outdoor recreation resources and facilities in the state, c) a program for the implementation of the Plan, d) certification by the governor that ample …

Toward Automating Requirements Satisfaction Assessment, E. Ashlee Holbrook, Jane Huffman Hayes, Alex Dekhtyar

Computer Science and Software Engineering

This paper introduces the automation of satisfaction assessment: the process of determining the satisfaction mapping of natural language textual requirements to natural language design elements. Satisfaction assessment is useful because it assists in discovering unsatisfied requirements early in the lifecycle when such issues can be corrected with lower cost and impact than later. We define the basic terms and concepts for this process and explore the feasibility of developing baseline methods for its automation. This paper describes the satisfaction assessment approach algorithmically and then evaluates the effectiveness of two proposed information retrieval (IR) methods in two industrial studies - one …

Ice Supersaturations From The Vcsel Hygrometer In Hippo Global And Start08 Campaigns, Minghui Diao, Mark Zondlo

Faculty Publications, Meteorology and Climate Science

No abstract available.

Temporal Data Classification Using Linear Classifiers, Peter Revesz, Thomas Triplet

CSE Conference and Workshop Papers

Data classification is usually based on measurements recorded at the same time. This paper considers temporal data classification where the input is a temporal database that describes measurements over a period of time in history while the predicted class is expected to occur in the future. We describe a new temporal classification method that improves the accuracy of standard classification methods. The benefits of the method are tested on weather forecasting using the meteorological database from the Texas Commission on Environmental Quality.

Vowel Recognition From Articulatory Position Time-Series Data, Jun Wang, Ashok Samal, Jordan R. Green, Tom D. Carrell

CSE Conference and Workshop Papers

A new approach of recognizing vowels from articulatory position time-series data was proposed and tested in this paper. This approach directly mapped articulatory position time-series data to vowels without extracting articulatory features such as mouth opening. The input time-series data were time-normalized and sampled to fixed-width vectors of articulatory positions. Three commonly used classifiers, Neural Network, Support Vector Machine and Decision Tree were used and their performances were compared on the vectors. A single speaker dataset of eight major English vowels acquired using Electromagnetic Articulograph (EMA) AG500 was used. Recognition rate using cross validation ranged from 76.07% to 91.32% for …

Tb202: Composition And Biomass Of Forest Floor Vegetation In Experimentally Acidified Paired Watersheds At The Bear Brook Watershed In Maine, Peter Kenlan, G. B. Wiersma, A. S. White, I. J. Fernandez

Technical Bulletins

The percentage cover (abundance), frequency of occurrence, biomass, species richness, and species diversity of understory herbs was measured on a paired watershed ecosystem in eastern Maine, USA. This paired watershed site (Bear Brook Watershed in Maine, BBWM) has had the West Bear Brook Watershed treated bi-monthly with granular ammonium sulfate at a rate of 28.8 kg S ha-1 yr-1 and 25.2 kg N ha-1 yr-1 since 1989. East Bear Brook Watershed serves as the reference site. More than 100 plots were randomly located across the two watersheds. The data suggest that there is generally a lower frequency of occurrence of …

Itr: A Computational Framework For Observational Science: Data Assimilation Methods And Their Application For Understanding North Atlantic Zooplankton Dynamics, Andrew J. Pershing

University of Maine Office of Research Administration: Grant Reports

This project will develop a modular data assimilation system, investigate several algorithms to make data assimilation more efficient, and will apply this system to investigate zooplankton dynamics in the North Atlantic. The goal of data assimilation is to find the value of the control variables (typically, the initial conditions or boundary conditions or model parameters) producing the best agreement between the model and the data. A data assimilation system consists of a forward model representing known dynamics. This model is integrated and the deviation between its predictions and available observations are quantified by a cost function. An adjoint model, representing …

Observing Biogeochemical Cycles At Global Scales With Profiling Floats And Gliders: Prospects For A Global Array, Kenneth S. Johnson, William M. Berelson, Emmanuel S. Boss, Zanna Chase, Hervé Claustre, Steven R. Emerson, Nicolas Gruber, Arne Körtzinger, Mary Jane Perry, Stephen C. Riser

Marine Sciences Faculty Scholarship

Chemical and biological sensor technologies have advanced rapidly in the past five years. Sensors that require low power and operate for multiple years are now available for oxygen, nitrate, and a variety of bio-optical properties that serve as proxies for important components of the carbon cycle (e.g., particulate organic carbon). These sensors have all been deployed successfully for long periods, in some cases more than three years, on platforms such as profiling floats or gliders. Technologies for pH, pCO 2, and particulate inorganic carbon are maturing rapidly as well. These sensors could serve as the enabling technology for a global …

Teaching Physical Concepts In Oceanography: An Inquiry-Based Approach, Lee Karp-Boss, Emmanuel Boss, Herman Weller, James Loftin, Jennifer Albright

Marine Sciences Faculty Scholarship

This supplement to Oceanography magazine focuses on educational approaches to help engage students in learning and offers a collection of hands-on/minds-on activities for teaching physical concepts that are fundamental in oceanography. These key concepts include density, pressure, buoyancy, heat and temperature, and gravity waves. We focus on physical concepts for two reasons. First, students whose attraction to marine science stems from an interest in ocean organisms are typically unaware that physics is fundamental to understanding how the ocean, and all the organisms that inhabit it, function. Second, existing marine education and outreach programs tend to emphasize the biological aspects of …

On The Price Of Stability For Undirected Network Design, Giorgos Christodoulou, Christine Chung, Katrina Ligett, Evangelia Pyrga, Rob Van Stee

Computer Science Faculty Publications

No abstract provided.

M2-Factor Of Coherent And Partially Coherent Dark Hollow Beams Propagating In Turbulent Atmosphere, Yangsheng Yuan, Yangjian Cai, Jun Qu, Halil T. Eyyuboglu, Yahya Baykal, Olga Korotkova

Physics Articles and Papers

Analytical formula is derived for the M²-factor of coherent and partially coherent dark hollow beams (DHB) in turbulent atmosphere based on the extended Huygens-Fresnel integral and the second-order moments of the Wigner distribution function. Our numerical results show that the M²- factor of a DHB in turbulent atmosphere increases on propagation, which is much different from its invariant properties in free-space, and is mainly determined by the parameters of the beam and the atmosphere. The relative M²-factor of a DHB increases slower than that of Gaussian and flat-topped beams on propagation, which means a …