cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Four-lepton production at hadron colliders: aMC@NLO predictions with theoretical uncertainties
Creators: name: Frederix, Rikkert
name: Frixione, Stefano
name: Hirschi, Valentin
name: Maltoni, Fabio
name: Pittau, Roberto
name: Torrielli, Paolo
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We use aMC@NLO to study the production of four charged leptons at the LHC, performing parton showers with both HERWIG and Pythia6. Our underlying matrix element calculation features the full next-to-leading order $O(α_S)$ result and the $O(α_S^2)$ contribution of the $gg$ channel, and it includes all off-shell, spin-correlation, virtual-photon-exchange, and interference effects. We present several key distributions together with the corresponding theoretical uncertainties. These are obtained through a process-independent technique that allows aMC@NLO to compute scale and PDF uncertainties in a fully automated way and at no extra CPU-time cost
description: 24 pages, 6 figures
Antimicrobial Resistant Escherichia coli in Alberta's Rural Well Water
Creators: name: Meyer, Kelsey
Publisher: name: Graduate Studies
Year: 2017
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Veterinary Science
subject: Biophysics--Medical
subject: Environmental Sciences
subject: Epidemiology
subject: Public Health
subject: E.coli
subject: Escherichia coli
subject: Water
subject: Drinking water
subject: groundwater
subject: Well water
subject: Antibiotic resistance
subject: Antimicrobial resistance
subject: ESBL
subject: Extended spectrum beta lactamase
subject: Alberta
subject: STEC
subject: Shiga toxin producing E.coli

description: The consumption of rural well water (RWW) contaminated with antimicrobial resistant (AMR) Escherichia coli has been linked to human carriage of resistance. Our objective was to determine whether AMR and extended spectrum beta lactamase (ESBL) producing E.coli are present in Alberta’s RWW. Resistant isolates were detected with an agar screen on (up to) 20 isolates from each sample, and AMR was measured with NARMS Sensititre(TM) panels. Disk diffusion assays detected ESBL-producing E.coli, and spatial clusters of AMR E.coli were assessed using ArcGIS (version 10.4.1) and SaTScan(TM) (version 9.4.4). Among 1129 samples, 22% contained AMR E.coli including four ESBL-producers. Resistance to three or more classes of antimicrobials was observed in 48% of AMR E.coli isolates, and a significant cluster of AMR E.coli was detected between Calgary and Lethbridge (p<0.05). Our results suggest AMR and ESBL-producing E.coli are present in Alberta’s rural well water, posing a risk to human and animal health.
Bioinformatics approach to investigate genetic differences underlying breast tumours with specific outcomes of adoptive T-cell therapy using a mouse model
Creators: name: Chun, Hye-Jung
Publisher: name: University of British Columbia
Year: 2010

description: The immune system plays a critical role in cancer prevention and development. The stimulation of natural immune reaction in a cancer patient by adoptive T-cell therapy has shown success in treating metastatic melanomas and renal cell carcinomas. However, the use of adoptive T-cell therapy remains limited due to unpredictable outcomes and low response rates. In particular, adoptive T-cell therapy for breast cancer has not been realized, despite of the presence of immunogenic antigens such as over-expressed HER2, present in 20-40% of breast tumours. Using a unique transgenic mouse model, the global profiles of gene expression, miRNA abundance and single nucleotide variants (SNVs) were investigated to identify the molecular difference of murine mammary tumours with isogenic background, which exhibited complete regression (CR), partial regression (PR) or progressive disease (PD) outcome of adoptive T-cell therapy. The bioinformatics analyses were further carried out to identify uniquely activated pathways, prognostic gene expression signatures, the effect of post-transcriptional gene regulation and mutated genes unique to tumours with specific outcome. The largest differences in gene expression, miRNA and SNV profiles were repeatedly observed between the regressing (CR, PR) and non-regressing (PD) tumours, supporting the attribution of molecular differences to the immunotherapy outcome. In particular, the gene expression signatures derived from genes in immune-related pathways were experimentally validated to be strong prognostic markers for predicting the CR outcome. Comparison with the human breast cancer subtypes further revealed similarities of the non-regressing tumours with the basal subtype, and the regressing tumours with the HER2 subtype. The difference in miRNA profiles between CR and PR tumours suggested potential translational activities unique to PR, which was nearly identical to CR at the transcriptome level. The findings from this study show that tumour-derivied factors that either promote or suppress the immune system are responsible for the varying outcome of immunotherapy, and that the molecular characteristics can be further applied for the development of clinical prognostic tools, cancer vaccines and drug targets to enhance the efficacy of adoptive T-cell therapy.
Electronic states and magnetic structure at the Co3O4 (110) surface: a first principles study
Creators: name: Chen, Jia
name: Selloni, Annabella
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Tricobalt tetraoxide (Co3O4) is an important catalyst and Co3O4(110) is a frequently exposed surface in Co3O4 nanomaterials. We employed Density-functional theory with on-site Coulomb repulsion U term to study the atomic structures, energetics, magnetic and electronic properties of the two possible terminations, A and B, of this surface. These calculations predict A as the stable termination in a wide range of oxygen chemical potentials, consistent with recent experimental observations. The Co3+ ions do not have a magnetic moment in the bulk, but become magnetic at the surface, which leads to surface magnetic orderings different from the one in the bulk. Surface electronic states are present in the lower half of the bulk band gap and cause partial metallization of both surface terminations. These states are responsible for the charge compensation mechanism stabilizing both polar terminations. The computed critical thickness for polarity compensation is 4 layers.
title: An ostensive information architecture to enhance semantic interoperability for healthcare information systems
Creators: name: Guo, Hua
Publisher: name: University of Reading
Year: 2023

description: Health information systems (HISs) manage healthcare data and support 
decision-making in order to improve the quality of health service. The 
nature of healthcare demands, particularly resulting from patient-centred 
care policies and evidence-based medicine, necessitates the efficient 
management and usage of healthcare resources. Given the benefits that 
technological advancements such as sensor-based technologies and 
ubiquitous computing environments give to healthcare services, the HIS 
faces various hurdles. The Interoperability across diverse information 
systems, particularly the complexity introduced by continuously 
increasing data sources, is one of the greatest obstacles. This research 
focuses on the semantic ambiguity in information exchange processes 
and then proposes an ostensive information architecture based on the
widely adopted international standard FHIR (Fast Health Interoperability 
Resources) to improve the semantic interoperability between healthcare 
information systems.
The semantic interoperability concerns the capacity of systems to share 
and interpret the meaning of information exchanged in ecosystems. 
Motived by the semantic ambiguity generated in FHIR implementation, 
this research investigates the semiotic sources semantic ambiguity. It 
then proposes an ostensive information architecture to reduce ambiguity 
caused by applying FHIR specifications in various contexts for various 
objectives.
Examining the effect of anti-tumor lipid drugs on pH homeostasis and membrane structure in Saccharomyces cerevisiae
Creators: name: Czyz, Ola Aleksandra Joanna
Publisher: name: Graduate Studies
Year: 2013
Subjects: subject: Biology--Cell
subject: Genetics
subject: FOS: Biological sciences
subject: Edelfosine
subject: anti-tumor lipids
subject: yeast
subject: pH homeostasis
subject: lipid raft
subject: nutrient transporters

description: The lysophosphatidylcholine analogue, edelfosine is a potent anti-tumor lipid drug that is known to target cellular membranes. The underlying mechanisms leading to cell death remain largely controversial, although previous results obtained using yeast, have indicated that edelfosine associates with lipid rafts at the plasma membrane (PM), resulting in the internalization of essential proton pump, Pma1 and ergosterol. To further elucidate the conditions that enhance or prevent the cytotoxic effect of edelfosine, genome-wide surveys in the model organism Saccharomyces cerevisiae were performed. The results of these screens indicated that maintenance of pH homeostasis modulates cell sensitivity to edelfosine. Our studies further demonstrated that edelfosine induces intracellular acidification and alters PM organization by selectively inducing ubiquitination and subsequent endocytosis of PM transporters. We also showed that the second-generation anti-tumor lipids, miltefosine and perifosine, cause PM disorganization in a manner analogous to edelfosine, suggesting a similar mode of action for this drug family.
Thermal and electrical conductivity of iron at Earth's core conditions
Creators: name: Pozzo, Monica
name: Davies, Chris
name: Gubbins, David
name: Alfè, Dario
Publisher: name: arXiv
Year: 2012
Subjects: subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: The Earth acts as a gigantic heat engine driven by decay of radiogenic isotopes and slow cooling, which gives rise to plate tectonics, volcanoes, and mountain building. Another key product is the geomagnetic field, generated in the liquid iron core by a dynamo running on heat released by cooling and freezing to grow the solid inner core, and on chemical convection due to light elements expelled from the liquid on freezing. The power supplied to the geodynamo, measured by the heat-flux across the core-mantle boundary (CMB), places constraints on Earth's evolution. Estimates of CMB heat-flux depend on properties of iron mixtures under the extreme pressure and temperature conditions in the core, most critically on the thermal and electrical conductivities. These quantities remain poorly known because of inherent difficulties in experimentation and theory. Here we use density functional theory to compute these conductivities in liquid iron mixtures at core conditions from first principles- the first directly computed values that do not rely on estimates based on extrapolations. The mixtures of Fe, O, S, and Si are taken from earlier work and fit the seismologically-determined core density and inner-core boundary density jump. We find both conductivities to be 2-3 times higher than estimates in current use. The changes are so large that core thermal histories and power requirements must be reassessed. New estimates of adiabatic heat-flux give 15-16 TW at the CMB, higher than present estimates of CMB heat-flux based on mantle convection; the top of the core must be thermally stratified and any convection in the upper core driven by chemical convection against the adverse thermal buoyancy or lateral variations in CMB heat flow. Power for the geodynamo is greatly restricted and future models of mantle evolution must incorporate a high CMB heat-flux and explain recent formation of the inner core.
description: 11 pages including supplementary information, two figures. Scheduled to appear in Nature, April 2012
Direct Observation of Inner and Outer G' Band Double-resonance Raman Scattering in Free Standing Graphene
Creators: name: Luo, Zhiqiang
name: Cong, Chunxiao
name: Zhang, Jun
name: Xiong, Qihua
name: Yu, Ting
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In contrary to the widely reported single and symmetric peak feature of G' (or 2D) band in Raman spectrum of graphene, we herein report the observation of splitting in G' band in free standing graphene. Our experimental findings provide a direct and strong support for the previous theoretical prediction that the coexistence of the outer and inner processes in the doubleresonance Raman scattering would cause the splitting of G' mode. Our investigation of the influence of trigonal warping effect on the spectral features of G' subbands further verified the theoretical interpretation established on the anisotropic electronic structure of graphene.
description: 7 pages, 5 figure
Investigating the Inhibitory Effect of Acidic pHs on Methane Biofiltration Technology
Creators: name: Barzgar, Sonya
Publisher: name: Graduate Studies
Year: 2017
Subjects: subject: Engineering--Environmental
subject: Methane

description: This research was focused on assessing the effect of pH on methane oxidation by methanotrophs in compost biofilters. The batch experiments were run to study the dependency of maximum methane oxidation rate (Vmax) on pH. In addition, the impact of moisture content on CH4 oxidation at different pH values was evaluated. The results from batch experiments confirmed that pH 4.5 is the lowest pH in which methanotrophs are still able to oxidize methane. Laboratory column experiments were performed to investigate the behaviour of compost biofilters operating at different pHs. The results confirmed that columns operated at pH 4.5 were found to oxidize methane at a rate of 53 g/m2/d compared to 146 g/m2/d in the columns operated at pH 7.5 (neutral). Observing no oxidation activity for columns operated at pH 2.5 leads to the fact that too acidic condition was suspected to be the cause for inhibiting methanotrophs ability to oxidize methane. Also, DNA sequencing analysis on the samples from column experiments indicated that the more acidic environment tends to inhibit the growth and activity of methanotrophs type I while being ineffective to the growth of methanotrophs type II. Biofilter columns operated at pH 2.5 contained only 2% methanotrophs type I, compared to 55% of the total microbial population in columns operated at pH 7.5. This study has revealed that the MOB population changes in the biofilter with acidification compromised its capacity to oxidize methane demonstrating that compost biofilter cannot operate efficiently under acidic conditions.
Dagbani tongue-root harmony : a formal account with ultrasound investigation
Creators: name: Hudu, Fusheini Angulu
Publisher: name: University of British Columbia
Year: 2010

description: The aim of this dissertation is (i) to contribute to understanding of [ATR] harmony patterns with a formal account of Dagbani [ATR] harmony using the theory of Headed Spans (Span Theory) and (ii) to answer basic empirical questions about the relations between tongue-root phonological features and the articulatory gestures involved in producing vowels with these features. In Dagbani [+ATR] harmony, there are three vowel triggers: the high front vowel /i/ triggers progressive assimilation of [+ATR]; the mid vowels [e] and [o] trigger regressive assimilation. Mid vowel triggers predictably surface in domain-final open syllables while /i/ is contrastive. I account for [+ATR] harmony using the theory of Grounded Phonology and the interaction of height-based markedness constraint hierarchies. In addition to the basic harmonic patterns, Dagbani [ATR] harmony is constrained by a height similarity condition limiting the trigger and target to vowels of the same specification for [±high]. Within Span Theory, this is argued to be a restriction on height featural combination in a [+ATR] span. A unique part of the formal analysis is the account of direction-specific consonant opacity. Having challenged previous harmony theories, the account here demonstrates the relative strength of Span Theory and supports the assumption that intervocalic consonants are targets of vowel harmony features. The second goal of the dissertation is achieved with an ultrasound imaging study testing the hypothesis that there is a direct mapping between tongue-root features and the articulatory positions of the tongue in producing vowels with different tongue-root feature specifications. It further investigates whether such a mapping also reflects which of the values of the feature [ATR]/[RTR] is dominant in a language. The results of 5 experiments show that in addition to the tongue-root position distinguishing [+ATR] from [-ATR] vowels, the dominant [+ATR] feature has a tongue-root position anterior to the neutral tongue-root rest position while the recessive [-ATR] vowels have a variable tongue-root position. The results support a direct mapping between the phonological feature [ATR] and the articulatory gestures that produce it.
Nonrelativistic Proca stars: Spherical stationary and multi-frequency states
Creators: name: Nambo, Emmanuel Chávez
name: Diez-Tejedor, Alberto
name: Preciado-Govea, Edgar
name: Roque, Armando A.
name: Sarbach, Olivier
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we follow an effective theory approach to study the nonrelativistic limit of a selfgravitating and selfinteracting massive vector field. Our effective theory is characterized by three parameters: the field's mass $m_0$ and the selfinteraction constants $λ_n$ and $λ_s$. For definiteness, we focus on a systematic study of the equilibrium configurations, commonly referred to as Proca stars when they have finite energy. We identify two different types of Proca stars, depending on the specific sector of the effective theory that we are exploring. In the generic sector, defined by $λ_s\neq 0$, all equilibrium configurations are stationary states described by wave functions that evolve harmonically in time. However, in the symmetry-enhanced sector, for which $λ_s=0$, there exist multi-frequency states whose wave functions oscillate with two or three distinct frequencies in addition to the stationary states. We determine the conditions under which a ground state configuration with fixed particle number exists. When these conditions are met, we prove that the lowest energy is reached by a stationary spherically symmetric configuration of constant polarization that is linear or circular depending on the sign of $λ_s$. We numerically construct some illustrative examples of spherical stationary and multi-frequency solutions, analyze their properties, and compare them with our analytical predictions. Unlike stationary states and other soliton configurations, which form a discrete set in the solution space associated with fixed particle number, the symmetry-enhanced sector exhibits a continuum of solutions with multi-frequency states connecting stationary states of constant polarization.
description: 28 pages, 15 figures and 2 tables. To appear in Phys. Rev. D
Multimodal Cancelable Biometric System
Creators: name: Paul, Padma Polash
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Computer Science
subject: Cancelable Feature Fusion
subject: Cancelable Binary Pattern
subject: Cancelable Biometrics
subject: Biometric Template Protection
subject: Multimodal Biometric System

description: Cyberattacks against individuals and organizations are increasing at alarming rates all over the world. Traditional password, pin, smart id, and tokens based systems are insufficient to provide reliable authentication. Biometric authentication is now widely used in both physical and virtual worlds. Unfortunately, even the well-established biometric systems are suffering from vulnerabilities, with the most crucial components being biometric templates that store user biometric data. If the biometric of a user is compromised, the identity and privacy of an individual are compromised as well, since it is impossible to revoke or reissue the biometric template. Therefore, secure and revocable biometric template generation algorithms are required to ensure biometric system integrity and user privacy. In this thesis, biometric template generation algorithm for multimodal biometric system is presented. To achieve the template protection for the multimodal biometric verification system, new methods for feature level fusion and feature extraction are proposed, called Cancelable Feature Fusion (CFF) and Cancelable Binary Pattern (CBP), respectively. CFF combines multiple biometric traits using random indexes so that for every fusion it generates a new fused template. Developed 2-Fold Cross-Folding (2-CF) and Generalized Cross-Folding (G-CF) are new algorithms for cancelable feature fusion, which utilize random indexes to combine multiple biometric traits. Another developed method is CBP, a biometric feature extraction algorithm that can generate a new set of features from a single sample as needed. For after matching fusion, Social Network Analysis (SNA) based score fusion is proposed to achieve better verification accuracy. In this thesis, traditional feature fusion and feature extraction algorithms are replaced with CFF and CBP respectively to support the template protection. For the validation of the methodologies, genuine, stolen and fake key scenarios are analyzed using several sets of virtual multimodal biometric databases of face, ear, and signature. Experimental results show that proposed Multimodal Cancelable Biometric System (MCBioS) architectures can achieve 0% Equal Error Rate (EER) and a higher template integrity.
Supplementary material from Striving for humane deaths for laboratory mice: hypobaric hypoxia provides a potential alternative to carbon dioxide exposure
Creators: name: Clarkson, J.M.
name: Martin, J. E.
name: Sparrey, J.
name: Leach, M. C.
name: McKeegan, D. E. F.
Publisher: name: The Royal Society
Year: 2023
Subjects: subject: 60801 Animal Behaviour
subject: FOS: Biological sciences

description: Killing is often an unavoidable and necessary procedure for laboratory mice involved in scientific research, and providing a humane death is vital for public acceptance. Exposure to carbon dioxide (CO2) gas is the most widely used methodology despite well proven welfare concerns. Consequently, the continued use of CO2 and its globally permitted status in legislation and guidelines presents an ethical dilemma for users. We investigated whether killing with hypobaric hypoxia via gradual decompression was associated with better welfare outcomes for killing laboratory mice. We compared the spontaneous behaviour of mice exposed to CO2, decompression or sham conditions, and used analgesic or anxiolytic interventions to determine their relative welfare impact. Gradual decompression resulted in longer times to unconsciousness and death and the pharmacological interventions support the notion of a minimally negative animal experience, while providing further evidence for pain and anxiety associated with exposure to CO2. Decompression resulted in moderate ear haemorrhage, but our welfare assessment suggests this may happen when mice are unconscious. Hence, gradual decompression could be the basis of significant refinement for killing laboratory mice. Future work should corroborate behaviour with neurobiological markers of loss of consciousness to verify the conscious phase of concern for animal welfare.
Additional file 1 of HDAC6-selective inhibitor CAY10603 ameliorates cigarette smoke-induced small airway remodeling by regulating epithelial barrier dysfunction and reversing
Creators: name: Zhang, Qin
name: Yan, Liming
name: Lu, Ye
name: Liu, Xiaodong
name: Yin, Yan
name: Wang, Qiuyue
name: Gu, Xiu
name: Zhou, Xiaoming
Publisher: name: figshare
Year: 2024
Subjects: Biophysics
Biochemistry
Medicine
Cell Biology
Molecular Biology
Pharmacology
Biological Sciences not elsewhere classified
Developmental Biology
Cancer
Science Policy

description: Supplementary Material 1: Supplementary original blot images.
Euricrium varians Lane 1955
Creators: name: Amorim, Dalton De Souza
name: Schnell, Guilherme
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Sciaridae
Euricrium
Euricrium varians

description: Euricrium varians (Lane, 1955)
(Figs 3, 4, 7, 8, 10, 12, 15, 16, 17)
 Euricrium varians (Lane, 1955): 257 (Zygoneura). Type-locality: Brazil, State of São Paulo, Salesópolis (Estação Biológica de Boracéa). Distribution: southern Brazil and higher altitudes in southeastern Brazil. References: Amorim (1992), catalogue; Mohrig & Menzel (2014), redescription, figs. 10a-b (male gonostyle, 4th flagellomere). Holotype male, MZUSP.
 Material examined. Holotype female, Brazil, State of São Paulo, Salesópolis (Estação Biológica de Boracéa), 14.viii.1947, E. Rabello, F. Travassos & J. Lane leg. (Reg. Nr. 7728, MZUSP). Paratypes, 3 females, same data as holotype (Reg. Nr. 7729–7731, MZUSP); 1 female, State of Santa Catarina, Seara (Nova Teutônia) vii.1948, F. Plaumann leg. (MZUSP). Additional specimens: State of Santa Catarina: 1 female, Seara (Nova Teutônia), May, 1970, F. Plaumann leg.; 1 female, same data, but October, 1971; 1 female, but April, 1971; 3 females, same data, but May, 1971; 15 females, same data, but June, 1971; 4 females, same data, but July, 1971; 8 females, same data, but August, 1971; 1 male, 12 females, same data, but September, 1971; 2 females, same data, but October, 1971; 1 female, same data, but May, 1972; 1 female, same data, but June, 1972; 1 female, same data, but July, 1972 (MZUSP). State of Paraná: 5 males, 19 females, Araucária, sweeping at industrial pine (Pinus taeda and P. elliotii) log yards, October 26, 2015, G. Schnell e Schühli col. (MZUSP); 2 males, 2 females, same data (DZUP); 5 females, same data, but 10.x.2015 (MZUSP); State of São Paulo: 1 female, Salesópolis, Estação Biológica de Boracea, July, 1949, Lane & Coher leg. (MZUSP).
 Besides the original description of E. varians by Lane (1955: 257), Mohrig & Menzel (2014: 152) carefully redescribed the species, with the reexamination of the female holotype. Mohrig & Menzel (2014) had in hands male specimens from Costa Rica that were considered conspecific with the female holotype from Brazil and illustrated the male flagellomere 4 and the male gonostyle. We have in hands fresh material from the species and we include here color plates—habitus (Figs 3–4), antenna (Figs 7–8), thorax (Fig 10), male terminalia (Fig 12), and wing (Figs 15–16)—with details that help discriminating E. varians from other close congeneric species. The sexual dimorphism in color and in flagellomere shape and extension in E. varians is more striking than in E. edwardsi, sp. n.
description: Published as part of Amorim, Dalton De Souza & Schnell, Guilherme, 2017, A new species of Euricrium Enderlein from southern Brazil, new records for E. varians (Lane), a new combination, and a key for the Neotropical species of the genus, pp. 327-340 in Zootaxa 4231 (3) on page 334, DOI: 10.11646/zootaxa.4231.3.2, http://zenodo.org/record/291326
Off-shell D=5, N=2 Riemann Squared Supergravity
Creators: name: Bergshoeff, Eric A.
name: Rosseel, Jan
name: Sezgin, Ergin
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct a new off-shell invariant in N=2, D=5 supergravity whose leading term is the square of the Riemann tensor. It contains a gravitational Chern-Simons term involving the vector field that belongs to the supergravity multiplet. The action is obtained by mapping the transformation rules of a spin connection with bosonic torsion and a set of curvatures to the fields of the Yang-Mills multiplet with gauge group SO(4,1). We also employ the circle reduction of an action that describes locally supersymmetric Yang-Mills theory in six dimensions.
description: 17 pages, v2 : references added
Clinical Simulation-Based Assessment in Respiratory Therapy Education
Creators: name: West, Andrew
Publisher: name: Graduate Studies
Year: 2017
Subjects: subject: Education
subject: Education--Higher
subject: Education--Technology
subject: Education--Vocational
subject: Health Sciences
subject: Rehabilitation and Therapy
subject: Simulation
subject: Assessment
subject: Networked Learning
subject: Ontological Security
subject: Fidelity
subject: Respiratory Therapy

description: The manuscripts that comprise this dissertation collectively investigate clinical simulation-based assessment in respiratory therapy education. Clinical simulation, characterized by debriefing that engages learners in self- and collaborative peer-assessment in addition to formative instructor assessment, is a well-established set of practices in respiratory therapy education. Contextual factors within the profession of respiratory therapy in Canada, in particular its regulatory environment, are prompting a move from using formative debriefing sessions that support learning in simulation, to employing high-stakes testing intended to assess entry-to-practice competencies. There exists a need for the profession to consider how environmental factors, including externally derived requirements, may ultimately impact the effectiveness of simulation-based learning environments. It is proposed that several important social elements of the clinical simulation-based learning environment, including trust, ontological security, and fidelity, may be at risk in the face of the evolving assessment practices in health professions education. As an at once undertheorized yet highly technologically enhanced and connected approach to learning, a shift towards socio-cultural perspectives on clinical simulation assessment, research, and practice is needed to better understand the social phenomena inherent in clinical simulation. This shift can benefit from the adoption of networked learning theory to encourage deeper understanding of the interrelationships that exist among sociomaterial dimensions of clinical simulation. The findings of a qualitative case study are presented, examining the experiences of respiratory therapy students in clinical simulation learning environments where comparable instructional designs are characterized by differences between two important assessment approaches used in the field: formative debriefing for learning and summative debriefing for high-stakes testing. The findings indicate that social aspects of participants’ experiences in clinical simulation are characterized by: their comfort levels, their senses of ontological security, and their degrees of immersion in the simulation. Each of these experiential dimensions were impacted in some manner by the assessment design, a phenomenon that was further modulated by individuals’ self-reflexive capacity. These phenomena appear to coalesce to impact learners’ perceptions of their own performance in the clinical simulation context, which was also related to the approach to assessment built into in the instructional design.
Realizing Universal Edge Properties in Graphene Fractional Quantum Hall Liquids
Creators: name: Hu, Zi-Xiang
name: Bhatt, R. N.
name: Wan, Xin
name: Yang, Kun
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Universal chiral Luttinger liquid behavior has been predicted for fractional quantum Hall edge states, but so far has not been observed experimentally in semiconductor-based two-dimensional electron gases. One likely cause of this absence of universality is the generic occurrence of edge reconstruction in such systems, which is the result of a competition between confinement potential and Coulomb repulsion. We show that due to a completely different mechanism of confinement, edge reconstruction can be avoided in graphene, which allows for the observation of the predicted universality.
description: 5 pages, 3 figures
Observational cosmology using characteristic numerical relativity: Characteristic formalism on null geodesics
Creators: name: van der Walt, P. J.
name: Bishop, N. T.
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The characteristic formalism of numerical relativity is based on a system of coordinates aligned with outgoing null cones. While these coordinates were designed for studying gravitational waves, they can also be easily adapted to model cosmological past null cones (PNCs). Similar to observational coordinates in the observational approach to cosmology, this then provides a model that only makes use of information causally connected to an observer. However, the diameter distance, which is used as a radial coordinate, limits the model's cosmological application to the region prior to the PNC refocussing. This is because after refocussing, the diameter distance ceases to be a unique measure of distance. This paper addresses the problem by introducing a metric based on the Bondi-Sachs metric where the radial coordinate is replaced by an affine parameter. A model is derived from this metric and it is then shown how an existing numerical scheme can be adapted for simulation of cosmological PNC behaviour. Numerical calculations on this model are found to have the same stability and convergence properties as the standard characteristic formalism.
description: 18 pages, 9 figures, 1 Table. arXiv admin note: some text overlap with arXiv:some 1007.3189
Analytical solutions to zeroth-order dispersion relations of a cylindrical metallic nanowire
Creators: name: Wan, Li
name: Huang, Yun-Mi
name: Dong, Chang-Kun
name: Luo, Hai-Jun
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Zeroth-order complex dispersion relations of a cylindrical metallic nanowire have been solved out analytically with approximate methods. The analytical solutions are valid for the sections of the dispersion relations whose frequencies are close to the Surface Plasmon frequency. The back bending of the Surface Plasmon-Polaritons(SPPs) can be well described by the analytical solutions, confirming that the back bending is originated from the metal Ohmic loss. The utility of the back bending point in the dispersion relation for the measurement of the metallic Ohimc loss has also been suggested.
description: 6pages, 3figures
Three Essays on Institutional Economics
Creators: name: Heffernan, Ian
Publisher: name: Arts
Year: 2016
Subjects: subject: Economics
subject: Economics--Theory
subject: Economics
subject: Conflict
subject: Political Economy

description: This dissertation presents three essays in institutional economics. Each chapter considers a different stage in the progression of institutional agreements, beginning with an essay on the origin of repressive regimes, proceeding to an essay on how natural resources finance civil war, and concluding with an essay on the effect of political institutions on the voluntary provision of public goods. Each essay examines the interdependence of economic and institutional factors. The first chapter examines the relationship between insecure property rights over natural resource wealth, redistribution, and the emergence of repressive regimes. This chapter presents a theoretical model examining a government's decision to redistribute natural resource wealth when property rights are insecure. I show that the presence of insecure property rights can lead to redistribution taking inefficient forms. I then consider repression as a means available to those in power to avoid engaging in inefficient redistribution. The theory suggests that repressive regimes emerge as a means to avoid deterring conflict through redistribution. The second chapter examines the importance of economic factor when institutions are contested, by examining how the ability to finance civil war with natural resource wealth effects the incidence, onset and duration of civil war. In this essay I estimate the causal effect of an international certification scheme whose aim is to reduce conflict by eliminating trade in diamonds sold to finance conflict. I find that the policy significantly reduced conflict and that this reduction resulted from a reduction in the duration of conflicts rather than preventing new conflicts from initiating. The results suggest that access to a lucrative source of financing does not cause civil war but can prolong civil wars that began for other reasons. In the final chapter I consider how political institutions, once in place, effect economic outcomes. In this essay, I examine the effect that democratic institutions have on cooperation in public goods games. I find that allowing people to vote on the per capita return of a public good significantly increases contributions to the public good. The results emphasize the important of the institutions that choose policy.
Arabidopsis thaliana Protein Phosphatase 1: A Cell Signalling Engine with Many Keys
Creators: name: Sieben, Nicolas Ambrose
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Biochemistry
subject: Phosphatase

description: Throughout all domains of life the strict regulation of signalling pathways allows for the proper control of cellular processes through the action of protein kinases and protein phosphatases. In the model plant Arabidopsis thaliana, one of the major protein phosphatases, PP1, represents a critical regulator of many signalling pathways. Type one phosphatases (PP1) use regulatory subunits to target dephosphorylation and associate with these regulatory proteins via a highly conserved ‘RVxF’ motif. The regulators of PP1 in Arabidopsis are largely unidentified. Using Arabidopsis stable transformant plant extracts, the regulators of PP1 have been identified. Of the previously known PP1 regulators, GEM is a known root hair differentiation checkpoint protein and contains the PP1 docking motif ‘RVxF’. Using a biophysical approach, I have validated the PP1:GEM interaction through the ‘RVxF’ motif. Finally GEM contains a GRAM domain and the analysis of phosphotidyl-inositol lipid binding to this domain was examined.
title: Η συμβολή της δραματικής τέχνης στην ανάπτυξη της συναισθηματικής επάρκειας των παιδιών της Δ΄ τάξης δημοτικού σχολείου.
title: The contribution of dramatic art to the strengthening of emotional competence of 4th grade primary school children.
titleType: AlternativeTitle
Creators: name: Δέδε, Δήμητρα
Publisher: name: Πανεπιστήμιο Πελοποννήσου
Year: 2023
Subjects: subject: Δραματική τέχνη
subject: Εκπαιδευτικό δράμα
subject: Συναισθηματική επάρκεια
subject: Ενσυναίσθηση
subject: Συνεργασία
subject: Παρεμβάσεις
subject: Πρωτοβάθμια εκπαίδευση
subject: Μικτή έρευνα
subject: Δραματική Τέχνη
subject: Συναισθηματική Επάρκεια
subject: Παρεμβάσεις
subject: Ενσυναίσθηση
subject: Συνεργασία

description: Η παρούσα έρευνα εξετάζει τη συμβολή της δραματικής τέχνης, μέσω παιδαγωγικών παρεμβάσεων, στην ενίσχυση της συναισθηματικής επάρκειας μαθητών και μαθητριών δημοτικού σχολείου. Πραγματοποιήθηκε έρευνα δράσης κατά το σχολικό έτος 2022-2023 σε δημοτικό σχολείο της περιοχής της πόλης του Άργους. Εφαρμόστηκαν 12 εργαστήρια δραματικής τέχνης σε μαθητές/τριες της Δ’ τάξης της σχολικής μονάδας, κατά την περίοδο από Οκτώβριο 2022 μέχρι και Ιανουάριο 2023. Για τη συλλογή δεδομένων, υιοθετήθηκε η μεικτή ερευνητική μέθοδος. Για τα ποσοτικά δεδομένα αξιοποιήθηκε ερωτηματολόγιο, το οποίο συμπληρώθηκε από τους μαθητές/τριες πριν και μετά τις παρεμβάσεις. Τα δεδομένα επεξεργάστηκαν και αναλύθηκαν με τη βοήθεια του Statistical Package for the Social Science (SPSS). Στα ποιοτικά δεδομένα, ακολουθήθηκε η συμμετοχική παρατήρηση και για την επεξεργασία των ευρημάτων υιοθετήθηκε η θεματική ανάλυση και οι σημειώσεις πεδίου. Τα συμπεράσματα της έρευνας επιβεβαίωσαν τα ερευνητικά ερωτήματα που τέθηκαν και συνεπώς τη συμβολή της δραματικής τέχνης στην ενίσχυση της συναισθηματικής επάρκειας των μαθητών.
title: Βιωσιμότητα – Κοινωνική αναγκαιότητα και κινητήρια δύναμη μετασχηματισμού της ναυτιλίας
title: Sustainability – Social need and motivational power of change for the shipping industry
titleType: AlternativeTitle
Creators: name: Καρυώτη, Σοφία
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2023
Subjects: Βιωσιμότητα
Ναυτιλία
Εφοδιαστική αλυσίδα
Πράσινη χρηματοδότηση
Επιχειρηματικός κίνδυνος

description: Στην εργασία αυτή επιχειρώ μια ιστορική αναδρομή στις κοινωνικές και περιβαλλοντικές αιτίες της αφύπνισης και εμπέδωσης της βιώσιμης ανάπτυξης από την κοινωνία και τον κόσμο των επιχειρήσεων από το 1960 ως σήμερα. Στην συνέχεια και με γνώμονα τα κριτήρια και τους κινδύνους βιωσιμότητας όπως ορίζονται από τα Ηνωμένα Έθνη και έχουν ενσωματωθεί στις πολιτικές που επηρεάζουν άμεσα την ναυτιλία παραθέτω την επίδραση στον χρηματοπιστωτικό κλάδο, τις ναυτιλιακές εταιρείες, τα λιμάνια και τις εταιρείες αγοροπωλησίας φυσικών εμπορευμάτων, καθώς θεωρώ στην εργασία αυτή ότι η ναυτιλία είναι ένα τμήμα τις πολύπλοκης και ισχυρά αλληλεξαρτώμενης αλυσίδας εφοδιασμού (supply chain). Eντοπίζω κινδύνους και ευκαιρίες βιώσιμης ανάπτυξης στον κλάδο της ναυτιλίας σήμερα σε μια προσπάθεια να ερευνήσω ποιες είναι οι προκλήσεις βιωσιμότητας που αντιμετωπίζει η ναυτιλία σήμερα, πως επιδρούν οι προκλήσεις αυτές στην βιομηχανία της ναυτιλίας και τελικά αποτελούν και την κινητήρια δύναμη της ριζικής αναμόρφωσης της.
Multi Agent Protocol Creator (MAPC): Evolving Multi Agent Communications Protocols
Creators: name: Heard, Jason Peter
Publisher: name: Graduate Studies
Year: 2013
Subjects: subject: Artificial Intelligence
subject: Computer Science
subject: Multi Agent Systems
subject: Genetic Programming
subject: Communications Protocols

description: Multi agent systems rely on communication between agents, typically regulated by protocols, to facilitate cooperation and coordination. To create protocols, multi agent system designers spend an extensive amount of time designing and testing to ensure that all requirements of the new protocol have been met. To aid the creation of multi agent protocols, research has shifted from designing low-level protocols, where every interaction must be outlined, to designing higher-level protocol description languages, which allow high-level interactions to be described. Though the focus of research has shifted, the general process of designing new multi agent protocols has remained consistent and still requires that designers describe actions of agents at various stages of a protocol. This dissertation describes an alternative process for creating protocols: an automatic protocol creator that generates a protocol based on a description of the requirements of the desired protocol. The Multi Agent Protocol Creator (MAPC) was constructed to evolve protocols using genetic programming. To evolve protocols, MAPC must first be given a protocol domain model. This protocol domain model contains all of the information needed to define the requirements of a new protocol in a declarative manner. It includes infor- mation to generate potential protocols, try the generated protocols in an appropriate environment and then evaluate their performance once they have been executed. Tests show that MAPC is able to evolve protocols in several test protocol domains. Concise, reasonable protocols, that are tailored to the inputs of the given protocol domain, similar to those that would potentially be programmed by a human, are produced. The use of MAPC will enable agent designers to focus on the desired communication instead of specific protocol details.
Analytic Models for the Evolution of Semilocal String Networks
Creators: name: Nunes, A. S.
name: Avgoustidis, A.
name: Martins, C. J. A. P.
name: Urrestilla, J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We revisit previously developed analytic models for defect evolution and adapt them appropriately for the study of semilocal string networks. We thus confirm the expectation (based on numerical simulations) that linear scaling evolution is the attractor solution for a broad range of model parameters. We discuss in detail the evolution of individual semilocal segments, focusing on the phenomenology of segment growth, and also provide a preliminary comparison with existing numerical simulations.
description: 13 pages, 13 figures, submitted to Phys. Rev. D; v.2: minor corrections and clarifications, following referee's suggestions
Fully Packed Loop configurations in a triangle
Creators: name: Nadeau, Philippe
Publisher: name: arXiv
Year: 2011
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: Fully Packed Loop configurations (FPLs) are certain configurations on the square grid, naturally refined according to certain link patterns. If $A_X$ is the number of FPLs with link pattern $X$, the Razumov--Stroganov correspondence provides relations between numbers $A_X$ relative to a given grid size. In another line of research, if $X\cup p$ denotes $X$ with $p$ additional nested arches, then $A_{X\cup p}$ was shown to be polynomial in $p$: the proof gives rise to certain configurations of FPLs in a triangle (TFPLs). In this work we investigate these TFPL configurations and their relation to FPLs. We prove certain properties of TFPLs, and enumerate them under special boundary conditions. From this study we deduce a class of linear relations, conjectured by Thapper, between quantities $A_X$ relative to different grid sizes, relations which thus differ from the Razumov--Stroganov ones.
description: 25 pages, many figures. This article contains some of the work presented at the Fpsac 2010 conference in San Francisco
Territorial Disputes in the Arctic: Prospects for Conflict and Cooperation
Creators: name: Halt, Christian
Publisher: name: Graduate Studies
Year: 2017
Subjects: subject: Political Science--International Law and Relations
subject: Arctic
subject: Territorial Disputes

description: This thesis examines the territorial disputes between Arctic states and investigates why the region has not seen conflict resulting from the disputes and whether this state of affairs will persist. The economic, strategic and symbolic value of the disputed territory is considered for all parties involved, as is the role this value has in fostering cooperative or conflictual relations. Through examination of the Arctic’s disputed territory, it is concluded that the Arctic’s harsh environment has played an important role in limiting the value of the disputed territory and therefore allowing Arctic states to avoid both serious management efforts and conflictual relations. However, the value of the disputed territory is growing, as is the need for states to manage activity in these areas. Should Arctic states continue to leave disputes unresolved, future attempts at resolution will involve more contentious negotiations, along with a greater potential for inter-state incidents and clashes.