Physical Sciences and Mathematics Commons^™

Technology Platform For Sampling Water With Electrolyte-Gated Organic Transistors Sensitised With Langmuiur-Deposited Calixarene Surface Layers., Delia Puzzovio, Abdullah Al Naim, Lee Hague, Mary Deasy, James P. Ward, Tim Richardson, Martin Grell

Articles

We demonstrate a technology platform that enables the development of new, surface-sensitised organic transistor sensors. We show that an organic semiconductor can still be gated by an electric double layer within the electrochemical window of water after the deposition of up to four Langmuir- Schäfer calixarene layers onto its surface. Since many calixarenes are known to selectively bind waterborne cations, this facilitates sensitising a conventional organic semiconductor with a physically deposited layer for specific cation recognition. When at least two Langmuir-Schäfer layers are deposited, these also block the electrochemical doping of the organic semiconductor, which otherwise competes with the field …

Tackling Tax Evasion: Transfer Price Manipulation, Extractive Natural Resources And A Strategy For The Southern African Customs Union, Patrick Grant Mclennan

Electronic Theses and Dissertations

An increase in the number of multinational enterprises (MNEs) has increased the attention on cross-border challenges, such as transfer price manipulation (TPM). TPM is a development issue - it undermines institutions as well as siphons money from government revenues that could be directed towards programs for human development. Pervasive corruption in the natural resource sector supports an environment where TPM can flourish. This paper develops a strategy for combating TPM within the countries of the Southern African Customs Union. It does this by 1) defining the terrain of illicit flows, both generally and specifically to the abuse of transfer pricing …

Modeling Of Growth Kinetics And Characterization Of Membrane Mechanics, Antonio Nava

Electronic Theses and Dissertations

One growing field in alternative energy is biofuel production through microorganisms. These fields of research include hydrogen and biofuel production through the cultivation of algae. We've selected 2 different algae, Anabaena sp. cpcc 387 and Tetraselmis to study. Through mathematical modeling of Anabaena we investigate the complex multicellular relationships and colony stability when noise is introduced. In conjunction with researchers at NREL, we've set out to characterize Tetraselmis cells' membrane elasticity.

Accurate Player Modeling And Cheat-Proof Gameplay In Peer-To-Peer Based Multiplayer Online Games, Daniel Everett Pittman Jr.

Electronic Theses and Dissertations

We present the first detailed measurement study and models of the virtual populations in popular Massively Multiplayer Online Role-Playing Games (MMORPGs). Our results show that, amongst several MMORPGs with very different play styles, the patterns of behaviors are consistent and can be described using a common set of models.

In addition, we break down actions common to Trading Card Games (TCGs) and explain how they can be executed between players without the need for a third party referee. In each action, the player is either prevented from cheating, or if they do cheat, the opponent will be able to prove …

New Open Source Software For Building Molecular Dynamics Systems, Bruce Michael Allen

Electronic Theses and Dissertations

The context of this work is the development of open source software to support researchers to quickly build systems of molecules for molecular dynamics (MD) simulations. The goal is achieved through the integration of three open source programs by judicious modifications and creation of new source code, which allows the creation of molecular models, MD cells and the LAMMPS geometry input files. The software changes work together supporting an easy and intuitive process for simulation system creation. Creation of multiple MD cells for research simulations becomes quicker and provides needed standardization to the simulation process. The researcher can select from …

Interferometric, Astrometric, And Photometric Studies Of Epsilon Aurigae: Seeing The Disk Around A Distant Star, Brian Keith Kloppenborg

Electronic Theses and Dissertations

Epsilon (ε) Aurigae is a binary star system that has baffled astronomers for 170 years. In 1821 it was first noticed that the star system had dimmed by nearly 50%. After many decades of photometric monitoring, the 27.1 year period was finally established in 1903. A few years later, in 1912, Henry Norris Russell published the first analytic methods for binary star analysis. Later application of these formulae came to an interesting conclusion; the system was composed of two stars: the visible F-type supergiant, and an equally massive, but yet photometrically and spectroscopically invisible, companion.

Several theories were advanced to …

The Arctic Game, Sarah E. Nuernberger

Electronic Theses and Dissertations

Since outsiders first visited the Arctic, they have believed in man's ability to conquer the region. Today's Arctic conquest is not one of heroic exploration, but rather one of ownership and exploitation. This paper illustrates contestation in the Arctic through the metaphor of a game, with attendant prizes, players, and rules. It focuses on how to prevent the future destruction of the Arctic given the interactions of the Arctic's landscape, prizes, players, and current management frameworks. In the wake of renewed resource exploitation and escalating climate change impacts, the current frameworks and mindsets are inadequate to support the precarious balance …

Plasma Spectroscopic Techniques Applied To Biological And Environmental Matrices, Morgan Steele Schmidt

Electronic Theses and Dissertations

The purpose of this research was to apply the use of direct ablation plasma spectroscopic techniques, including spark-induced breakdown spectroscopy (SIBS) and laser-induced breakdown spectroscopy (LIBS), to a variety of environmental matrices. These were applied to two different analytical problems. SIBS instrumentation was adapted in order to develop a fieldable monitor for the measurement of carbon in soil. SIBS spectra in the 200 nm to 400 nm region of several soils were collected, and the neutral carbon line (247.85 nm) was compared to total carbon concentration determined by standard dry combustion analysis. Additionally, Fe and Si were evaluated in a …

Structural Polymorphism In Tau Filaments: An Implication For Neurodegenerative Diseases, Ayisha Siddiqua

Electronic Theses and Dissertations

Tau filaments are the pathological hallmark of >20 neurodegenerative diseases including Alzheimer's disease, Pick's disease, and progressive supranuclear palsy. In the adult human brain, six isoforms of tau are expressed that differ by presence or absence of the second of the four semiconserved repeats. As a consequence, half of the tau isoforms have three repeats (3R tau), whereas the other half has four repeats (4R tau).

Site-directed spin labeling of recombinant tau in conjunction with electron paramagnetic resonance spectroscopy was used to obtain structural insights into tau filaments. The studies showed that the filaments of 4R tau and 3R tau …

Nonlinear Optical Properties Of Carbon Nanotube Hybrids In Polymer Dispersions, Jun Wang, Kang-Shyang Liao, Daniel Früchtl, Ying Tian, Aisling Gilchrist , T, Nigel Alley, Enrico Andreoli, Brad Aitchison, Albert Nasibulin, Hugh Byrne, Esko I. Kauppinen, Long Zhang, Werner Blau, Seamus Curran

Articles

A series of double-walled carbon nanotubes (DWNTs) and multi-walled nanotubes (MWNTs) functionalized with selected organic chromophores, fluorescein 5(6)-isothiocyanate (FITC), rhodamine B isothiocyanate (RITC) and fullerene (C₆₀) were synthesized by covalently linking these electron-donor groups to the metallic nanotubes. These versatile carbon nanotube composites show remarkable nonlinear optical (NLO) performance, due to a merged effect of the complementary NLO characteristics of the moieties of the composites. The hybrids were characterized by UV-Vis spectroscopy and Raman spectroscopy. Evidence suggests charge transfer species are formed between the chromophores and the nanotubes. The optical limiting performance of the DWNT, MWNT hybrids and …

Al-In-Hornblende Thermobarometry And Sr-Nd-O-Pb Isotopic Compositions Of The Early Miocene Alaçam Granite In Nw Anatolia (Turkey), Altuğ Hasözbek, Burhan Erdoğan, Muharrem Satir, Wolfgang Siebel, Erhan Akay, Güllü Deni̇z Doğan, Heinrich Taubald

Turkish Journal of Earth Sciences

During and after the closure of the Neo-Tethyan Ocean and progressive collision of the Tauride-Anatolide Platform with the Sakarya Continent, widespread magmatism occurred in NW Anatolia. This magmatism is manifested in a NW-trending belt along the northern border of the Menderes Massif. Due to the complex geodynamic setting of this region, the exact emplacement depth of the granitoids is still a matter of debate. Here we present Al-in-hornblende barometrical data and Sr-Nd-Pb isotope compositions of the Early Miocene Alaçam granite. The results imply a shallow emplacement depth of this granite (4.7±1.6 km) in contrast to previous studies which suggested emplacement …

Geochemical And Isotopic Constraints On Petrogenesis Of The Beypazarı Granitoid, Nw Ankara, Western Central Anatolia, Turkey, Yeşi̇m Yücel Öztürk, Cahi̇t Helvaci, Muharrem Satir

Turkish Journal of Earth Sciences

The Upper Cretaceous Beypazarı granitoid of the western Ankara, Turkey, is composed of two different units, on the basis of petrography and geochemical composition; these are granodiorite and diorite. The granitoid is subalkaline, belonging to the high-K calc-alkaline I-type granite series, which have relatively low initial 87Sr/86Sr ratios (0.7053-0.7070). All these characteristics, combined with major, trace element geochemical data as well as mineralogical and textural evidence, reveal that the Beypazarı granitoid formed in a volcanic arc setting and was derived from a subduction-modified and metasomatized mantle-sourced magma, with its crustal and mantle components contaminated by interaction with the upper crust. …

Chromite-Hosted Silicate Melt Inclusions From Basalts In The Stravaj Complex, Southern Mirdita Ophiolite Belt (Albania), Izabella Havancsàk, Friedrich Koller, Jànos Kodolànyi, Csaba Szabò, Volker Höck, Kujtim Onuzi

Turkish Journal of Earth Sciences

The Stravaj ophiolite compex, part of the western Mirdita ophiolite belt in Albania, is located east of the Shpati massif, and west of the Shebenik massif. The Stravaj ophiolite sequence itself consist of MOR-related and subduction-related volcanic rocks (Hoeck et al. 2007) formed by pillow lavas and various dykes. The deeper units are formed by gabbros and plagioclase-bearing peridotites. The pillow lavas are intersected by basaltic dykes with a rather primitive composition. The studied basaltic dyke contains former relics of olivine, fresh spinel and clinopyroxene phenocrysts in a glassy groundmass. The silicate phases are strongly altered. The spinels appear as …

Aspects Of Final Disposal Of Radioactive Waste In Germany, Guido Bracke

Turkish Journal of Earth Sciences

Safe disposal of radioactive waste is required in all countries using nuclear power, radioactive materials in medicine and in industry or research. This contribution presents an overview of the strategy of final disposal of radioactive waste and summarizes the procedure and present status in Germany. It is concluded that the safe disposal of radioactive waste is feasible but that the public demand for safety has to be met by applying a stepwise, transparent, and traceable development procedure for a repository in a safety case to obtain regulatory and public approval.

Ichnology Of The Miocene Güneyce Formation (Southwest Turkey): Oxygenation And Sedimentation Dynamics, Jan Kresten Nielsen, Muhi̇tti̇n Görmüş, Kubi̇lay Uysal, Süveyla Kanbur

Turkish Journal of Earth Sciences

The Güneyce Formation is well exposed in the Lake District of southwestern Turkey. It was deposited in the early Miocene in the Neotethys ocean and contains a large variety of trace fossils. The following ichnotaxa were recognized: Chondrites intricatus, C. targionii, ?Cosmorhaphe isp., Helminthopsis isp., Helminthorhaphe flexuosa, Lorenzinia isp., Naviculichnium marginatum, ?Nereites isp., Ophiomorpha rudis, ?Phycosiphon incertum, Planolites beverleyensis, cf. Rhizocorallium isp. and Thalassinoides suevicus. There is a lateral trend from proximal turbiditic successions to distal low-oxygen shaly mudstone. Ophiomorpha rudis ichnosubfacies, Paleodictyon ichnosubfacies of the Nereites ichnofacies and Zoophycos ichnofacies were identified.

The Early−Middle Palaeozoic Oceanic Events Along The Southern European Margin: The Deli Jovan Ophiolite Massif (Ne Serbia) And Palaeo-Oceanic Zones Of The Great Caucasus, Guram Zakariadze, Stevan Karamata, Sergei Korikovsky, Aleksei Ariskin, Shota Adamia, Tamar Chkhotua, Sergei Sergeev, Natasha Solov'eva

Turkish Journal of Earth Sciences

The paper deals with the Middle Palaeozoic oceanic events on the northern margin of the Eastern Mediterranean Hercynides. The Balkan-Carpathian Ophiolite Belt (BCO) and palaeo-oceanic zones of the Great Caucasus, all framing the East European Platform from the south, are correlated. The BCO palaeo-oceanic complex was widely thought to be a Late Precambrian-earliest Cambrian oceanic thrust sheet (563±5 Ma), a part of the South European Palaeo-oceanic Suture. The geochronological studies carried out on gabbroic series of the Deli Jovan Massif (BCO, NE Serbia), showed, however, that they are of much younger (Early Devonian) age: (a) Sm-Nd mineral isochron age of …

Palaeozoic Formations From Dobrogea And Pre-Dobrogea – An Overview, Antoneta Seghedi

Turkish Journal of Earth Sciences

No abstract provided.

Tectonics Of The Strandja Massif, Nw Turkey: History Of A Long-Lived Arc At The Northern Margin Of Palaeo-Tethys, Boris Natalin, Gürsel Sunal, Muharrem Satir, Erkan Toraman

Turkish Journal of Earth Sciences

The Strandja Massif, Thrace Peninsula, NW Turkey, forms an important link between the Balkan Zone of Bulgaria, which is usually correlated with Variscan orogen in Central Europe, and the Pontides, where Cimmerian structures are the most prominent. The massif is composed of a Palaeozoic basement and a Triassic metasedimentary cover. The basement is made of various granite gneisses, paragneisses, and schists that are intruded by large plutons of monzonitic metagranites. Detrital zircon studies have revealed Ordovician (433 and 446 Ma) and Carboniferous (305 Ma) ages of the metasedimentary rocks. The isotopic age of the granite gneisses is 308-315 Ma (Carboniferous, …

Singular Solutions Of Coss-Coupled Epdiff Equations: Waltzing Peakons And Compacton Pairs, Colin Cotter, Darryl Holm, Rossen Ivanov, James Percival

Conference papers

We introduce EPDiff equations as Euler-Poincare´ equations related to Lagrangian provided by a metric, invariant under the Lie Group Diff(Rⁿ). Then we proceed with a particular form of EPDiff equations, a cross coupled two-component system of Camassa-Holm type. The system has a new type of peakon solutions, 'waltzing' peakons and compacton pairs.

Comparison Of Micro- And Nanoscale Fe+3-Containing (Hematite) Particles For Their Toxicological Properties In Human Lung Cells In Vitro, Kunal Bhattacharya, Eik Hoffmann, Roel Schins, Jens Boertz, Eva-Maria Prantl, Gerrit Alink, Hugh Byrne, Thomas Kuhlbusch, Qamar Rahman, Hartmut Wiggers, Christof Schulz, Elke Dopp

Articles

The specific properties of nanoscale particles, large surface-to-mass ratio and highly reactive surfaces, have increased their commercial application in many fields. However, the same properties are also important for the interaction and bio-accumulation of the non-/biodegradable nanoscale particles in a biological system and are a cause for concern. Hematite (α-Fe2O3), being a mineral form of Fe(III) oxide, is one of the most used iron oxides besides magnetite. The aim of our study was the characterization and comparison of biophysical reactivity and toxicological effects of α-Fe2O3 nano- (d < 100 nm) and microscale (d < 5 μm) particles in human lung cells. Our study demonstrates that the surface reactivity of nanoscale α-Fe2O3 differs to that of microscale particles with respect to the state of agglomeration, radical formation potential, and cellular toxicity. The presence of proteins in culture medium and agglomeration were found to affect the catalytic properties of the hematite nano- and microscale particles. Both the nano- and microscale α-Fe2O3 particles were actively taken up by human lung cells in vitro, although, they were not found in the nuclei and mitochondria. …

The Science Of Aging, Daniel Starer-Star

The Synapse: Intercollegiate science magazine

No abstract provided.

Photon Impact Factor And 𝑘T Factorization In The Next-To-Leading Order, Ian Balitsky

Physics Faculty Publications

The photon impact factor for the BFKL pomeron is calculated in the next-to-leading order (NLO) approximation using the operator expansion in Wilson lines. The result is represented as a NLO k_T-factorization formula for the structure functions of small-x deep inelastic scattering.

Design And Development Of Superconducting Parallel-Bar Deflecting/Crabbing Cavities, Subashini De Silva, Jean R. Delayen

Physics Faculty Publications

The superconducting parallel-bar cavity is a deflecting/crabbing cavity with attractive properties that is being considered for a number of applications. We present the designs of a 499 MHz deflecting cavity developed for the Jefferson Lab 12 GeV Upgrade and a 400 MHz crabbing cavity for the LHC High Luminosity Upgrade. Prototypes of these two cavities are now under development and fabrication.

Stable Isotope Composition Of Hydrothermally Altered Rocks And Hydrothermal Minerals At The Los Azufres Geothermal Field, Mexico, Ignacio S Torres Alvarado, Muharrem Satir, Daniel Perez Zarate, Peter Birkle

Turkish Journal of Earth Sciences

The Los Azufres geothermal field is the second most important geothermal field for electricity production in Mexico, with a total installed capacity of 188 MW. Hydrothermal alteration studies have been an important tool for geothermal exploration and development of the field, but little attention has been given to the geochemical and isotopic characterization of hydrothermal minerals. \delta^1^8O, \delta^2H, and \delta^1^3C systematics at Los Azufres geothermal field were investigated using whole rock samples, as well as hydrothermal minerals separates, obtained from different depths in the wells Az-26 and Az-52. Most \delta^1^8O values reproduce well the present in-situ field temperatures and isotopic …

Variability Of Neogene Continental Climates In Northwest Europe - A Detailed Study Based On Microfloras, Torsten Utescher, Abdul Rahman Ashraf, Andreas Dreist, Karen Dybkjaer, Volker Mosbrugger, Jörg Pross, Volker Wilde

Turkish Journal of Earth Sciences

This study presents a detailed continental palaeoclimate record for the Neogene of Northwestern Europe. Palynomorph samples from continental to marginal marine deposits in 5 correlated sections from the Lower Rhine Basin (NW Germany) covering the time-span from Burdigalian to Zanclean are analysed. Independent time-control in the sections is provided by sequence stratigraphy. Based on 1470 microfloras 3 temperature (mean annual temperature, warm and cold month mean) and 4 precipitation variables (mean annual precipitation, mean monthly precipitation in the driest, wettest and warmest month) are quantified using the Coexistence Approach, a method employing climate requirements of Nearest Living Relatives of fossil …

Sedimentary Properties Of The Middle−Upper Eocene Formations In Çardak, Burdur And İncesu, Sw Turkey, Ezher Toker, Mehmet Serkan Akki̇raz, Fuzuli̇ Yağmurlu, Funda Akgün, Sefer Örçen

Turkish Journal of Earth Sciences

The integration of sedimentological, palynological and palaeontological data in three different outcrops in SW Turkey provides a clearer understanding of the palaeoenvironments in an area between the Çardak-Dazkırı Basin and the Isparta region during the Middle-Late Eocene. In this study, the Çardak-Dazkırı (Başçeşme Formation), Burdur (Varsakyayla Formation) and Isparta (Kayıköy Formation) areas have been studied for facies and facies associations. These formations contain alluvial fan, fan delta, shelf and related marine deposits. Detailed field observations allowed 34 lithofacies and 10 facies associations to be identified. The palynomorph assemblages in the Başçeşme and Varsakyayla formations contain biostratigraphically important taxa such as …

Discovery Of A Mississippian Reef In Turkey: The Upper Viséan Microbial-Sponge-Bryozoan-Coral Bioherm From Kongul Yayla (Taurides, S Turkey), Julien Denayer, Markus Aretz

Turkish Journal of Earth Sciences

For the first time, a Mississippian reef is described from Turkey. This microbial-sponge-bryozoan-coral bioherm has been discovered in the Central Taurides (South Turkey), at Kongul Yayla located between Hadim and Taşkent. The bioherm contains a rich and diversified fauna: sponges and rugose corals are of particular interest. The bioherm shows four main facies reflecting distinct growth stages from the base to the top: (1) the basal bioclastic beds, (2) the core facies formed of framestone comprising rugose corals, lithistid sponges, fistuliporid bryozoans and microbial boundstone, (3) the crest facies with large colonies of cerioid rugose corals and chaetetid sponges, and …

A New Late Holocene Eolianite Record From Altınkum Beach, North Cyprus, Ahmet Evren Ergi̇nal, Nafi̇ye Güneç Kiyak, Topçu Ahmet Ertek

Turkish Journal of Earth Sciences

In this study, we investigated the main depositional characteristics and obtained Optically Stimulated Luminescence (OSL) ages of coastal eolianite on the north coast of Cyprus, where this occurrence had not previously been recorded. Based on EDX/SEM and XRD data and field observations, the studied eolianite that crops out between elevations of 1 m and 14 m a.s.l. is made up predominantly of quartz grains, most of which consist of medium- to fine-grained sand. The rock comprises aragonite, calcite and quartz with lesser amounts of bornite and hematite as accessory minerals. OSL ages indicated that the initial deposition of eolianite sands …

Late Palaeozoic To Cenozoic Evolution Of The Black Sea-Southern Eastern Europe Region: A View From The Russian Platform, Anatoly Nikishin, Peter Ziegler, Sergey Bolotov, Pavel Fokin

Turkish Journal of Earth Sciences

A synthesis of the Late Palaeozoic to Cenozoic evolution of the Black Sea region and the southern parts of the East European Platform (EEP) is presented. During Carboniferous to Early Permian times the Cordillera-type Euxinus Orogen evolved along the southern margin of the EEP in response to progressive closure of the Rheic and Palaeotethys oceans and the accretion of Gondwana-derived continental terranes. Permian development of the north-dipping Palaeotethys subduction system along the southern Pontides margin of these terranes was accompanied by important compressional intraplate deformation on the EEP. The Mesozoic to Palaeogene evolution of the southern parts of the EEP, …

Geology And Hydrocarbon Systems In The Western Black Sea, Georgi Georgiev

Turkish Journal of Earth Sciences

This paper presents the author's integrated regional studies during the last decade. The main purpose is to present an overall understanding of the geological structure, sedimentary basins and hydrocarbon systems of the whole Western Black Sea Zone (WBSZ). This study is based on original data from boreholes, seismic and gravity-magnetic surveys and hydrocarbon accumulations. Many geophysical borehole data obtained for WBSZ during the last 3-4 decades were interpreted mostly at a national level using different approaches, terminology and nomenclature for the same or similar lithostratigraphic and tectonic units. Therefore, a unified approach to interpretation of borehole-seismic data and correlation of …