cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Effect of Finite Element Discretisation on the Stationary Distribution of SPDEs
Creators: name: Voss, Jochen
Publisher: name: arXiv
Year: 2011
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60H35, 60H15, 65C30

description: This article studies the effect of discretisation error on the stationary distribution of stochastic partial differential equations (SPDEs). We restrict the analysis to the effect of space discretisation, performed by finite element schemes. The main result is that under appropriate assumptions the stationary distribution of the finite element discretisation converges in total variation norm to the stationary distribution of the full SPDE.
description: 15 pages, 1 figure
Spin-orbit scattering in quantum diffusion of massive Dirac fermions
Creators: name: Shan, Wen-Yu
name: Lu, Hai-Zhou
name: Shen, Shun-Qing
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Effect of spin-orbit scattering on quantum diffusive transport of two-dimensional massive Dirac fermions is studied by the diagrammatic technique. The quantum diffusion of massive Dirac fermions can be viewed as a singlet Cooperon in the massless limit and a triplet Cooperon in the large-mass limit. The spin-orbit scattering behaves like random magnetic fields only to the triplet Cooperon, and suppresses the weak localization of Dirac fermions in the large-mass regime. This behavior suggests an experiment to detect the weak localization of bulk subbands in topological insulator thin films, in which a narrowing of the cusp of the negative magnetoconductivity is expected after doping heavy-element impurities. Finally, a detailed comparison between the conventional two-dimensional electrons and Dirac fermions is presented for impurities of orthogonal, symplectic, and unitary symmetries.
description: 5 pages, 3 figures, 2 tables. To be submitted, comments are welcome
What is Helpful? Stories of Counselling by Asian Canadians
Creators: name: Lo, Lai Kwan Shirley
Publisher: name: Graduate Studies
Year: 2013
Subjects: subject: Educational Psychology
subject: Education--Guidance and Counseling
subject: Multicultural
subject: Client experience
subject: Asian

description: My interest in Asian Canadians’ perception of helpful counselling emerged from the discrepancy I felt between my personal counselling experience and the knowledge I learned from the current literature. Informed by knowledge of acculturation and the worldview of collectivism, scholars have identified some useful counselling strategies for Asian clients. Nevertheless, it has been argued that current understandings fail to address clients’ perspective. Using a narrative approach to research, I conducted this study aiming to gain a better understanding, from the perspective of East and Southeast Asian clients, of how counsellors could improve service delivery. Eight participants shared stories of their counselling experiences. Themes emerged reveal that counselling was once perceived as problem-oriented, but became a valuable experience when clients were able to gain different perspectives and self-awareness. The results also highlight that client’s self-agency plays an important role in the counselling process. Implications of these findings are discussed.
Electromagnetic wave scattering by a superconductor
Creators: name: Fiolhais, Miguel C. N.
name: Essén, Hanno
Publisher: name: arXiv
Year: 2012
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The interaction between radiation and superconductors is explored in this paper. In particular, the calculation of a plane standing wave scattered by an infinite cylindrical superconductor is performed by solving the Helmholtz equation in cylindrical coordinates. Numerical results computed up to $\mathcal{O}(77)$ of Bessel functions are presented for different wavelengths showing the appearance of a diffraction pattern.
description: 3 pages, 3 figures
Untersuchungen zur Rolle der RNA-Transportproteine Rec von HERV-K und REV von HIV-1 bei der Virusassemblierung
Creators: name: Liedgens, Linda
Publisher: name: Robert Koch-Institut
Year: 2019
Subjects: subject: 610 Medizin und Gesundheit

description: Diese Arbeit beschäftigt sich mit den RNA-Transportproteinen Rec des humanen endogenen Retrovirus K (HERV-K) und Rev des humanen Immundefizienz-Virus 1 (HIV-1) und ihrer Rolle während des nukleozytoplasmatischen RNA-Transports und der Virusassemblierung. Um ihrer Rolle als RNA-Transportproteine gerecht zu werden, müssen HERV-K Rec und HIV-1 Rev mit einer Vielzahl von Wirtsproteinen interagieren. Es wurde vor allem das Zusammenspiel mit möglichen Interaktionspartnern wie dem RNA-Transportprotein Staufen-1 oder dem antiviralen hochmolekularen APOBEC3G (apolipoprotein B mRNA-editing enzyme catalytic polypeptide 1-like) untersucht. Co-Immunpräzipitationsversuche konnten eine bereits gezeigte Interaktion zwischen HERV-K Rec und Staufen-1 auch für das HIV-1 Rev nachweisen. Die spezifische Interaktion, die hierbei zwischen Staufen-1 und HIV-1 Rev nachgewiesen wurde, konnte durch Immunfluoreszenzversuche bestätigt werden. Es soll untersucht werden, ob die Interaktion von Staufen-1 und den RNA-Transportproteinen Rec und Rev möglicherweise einen antiviralen Kontrollmechanismus der Wirtszelle darstellt, indem HIV-1 Rev und HERV-K Rec über die Interaktion mit dem Staufen-1 in Stressgranula und antivirale HMM APOBEC3G-Komplexe rekrutiert und dort regulatorischen Mechanismen unterworfen werden. Die räumliche Nähe von HERV-K Rec zu A3G konnte bereits gezeigt werden. Allerdings konnte dies für das HIV-Rev bei Versuchen im Rahmen dieser Bachelorarbeit nicht bestätigt werden. Ebenso konnte keine Colokalisation mit TIA-1, einem Stressgranula-Markerprotein gezeigt werden. Weiteres Ziel dieser Arbeit ist die Aufreinigung von Staufen-1- und HERV-K Rec-Protein. Dies soll die Vorarbeit für eine entsprechende Antikörpergenerierung darstellen und konnte für das Staufen-1 erfolgreich realisiert werden. Eine Aufreinigung des HERV-K Rec war trotz Versuchsoptimierung aufgrund der Bildung sogenannter „Inclusion Bodies“ nicht möglich.
Vortex Lines in Topological Insulator-Superconductor Heterostructures
Creators: name: Chiu, Ching-Kai
name: Gilbert, Matthew J.
name: Hughes, Taylor L.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: 3D topological insulator/s-wave superconductor heterostructures have been predicted as candidate systems for the observation of Majorana fermions in the presence of superconducting vortices. In these systems, Majorana fermions are expected to form at the interface between the topological insulator and the superconductor while the bulk plays no role. Yet the bulk of a 3D topological insulator penetrated by a magnetic flux is not inert and can gap the surface vortex modes destroying their Majorana nature. In this work, we demonstrate the circumstances under which only the surface physics is important and when the bulk physics plays an important role in the location and energy of the Majorana modes.
description: 10 pages, 4 figures
Magnetism in Transition metal doped Cubic SiC
Creators: name: Patnaik, Padmaja
name: Mukhopadhyay, Gautam
name: Singh, Prabhakar P.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report here our study on SiC doped with transition metals using first principle density functional theory calculations. We have considered cubic SiC with 3d transition metals as substitutional impurities for Si and C site separately. Cubic SiC doped with Cr, Mn, show ferromagnetism whereas with Sc, Ti, V and Co show site dependency of magnetic properties. Rests of the impurities are found to be non-magnetic.
description: Presented in the 55th DAE-Solid State Physics Symposium, 26th to 30th December, 2010, Manipal University, Manipal, India; AIP Conf. Proc. 1349, 1087-1088 (2011)
Inductively Coupled Two-Probe Measurement Setup with Improved Calibration for Online Impedance Measurement
Creators: name: Chou, Hui Lin
Publisher: name: Zenodo
Year: 2021

description: The online impedance serves as one of the most crucial specification to evaluate the health status and efficiency of an electrical device or system. The inductive coupling technique is a preferred approach to measure the online impedance due to the ease of implementation of the circuit which has zero physical contact to the live electrical system. The existing inductive coupling method deployed to measure the online impedance of an electrical device under test (DUT) adopts two probes in total: an injecting inductive probe (IIP) and a receiving inductive probe (RIP). An open/short/load (OSL) calibration procedure is implemented to eradicate the ramifications of the probe-to-probe coupling, however, based on the assumption that the calibration criterions (shorted, open and 50Ω) are approximated to their theoretical values in a specified frequency range. Hence, any measurement with frequency outside the specified range (i.e. ≥ 1 MHz) will not be accurate due to the frequency-dependent residual inductances and capacitances of the calibration model. To overcome the aforesaid limitation, this report introduces an improved calibration procedure which is applicable for a wider frequency range which takes the frequency-dependent characteristics into consideration. With the two-probe measurement setup (TPMS), the adopted improved calibration procedure is introduced to eradicate the ramifications of the probe-to-probe coupling with the intention to refine the accuracy of the extracted online impedance.
A Phenomenological Inquiry of the Lived Experiences of Participants in a Rotational Leadership Development Program at One Diversified Firm in Canada
Creators: name: Cook Ross, Christian L.
Publisher: name: Graduate Studies
Year: 2015
Subjects: subject: Education--Business
subject: rotational leadership development program
subject: Leadership Development
subject: transformative learning theory
subject: phenomenology
subject: emerging leaders
subject: job rotation

description: Many Canadian organizations have adopted job rotation as a leadership development intervention to ameliorate current and anticipated talent shortages in their leadership ranks. Corporately structured rotational leadership development programs (RLDPs) provide high potential employees with opportunities for development through a series of planned rotational job assignments, often across diverse business units. This research addressed a gap in the literature identified by the absence of in-depth qualitative research concerning the perspectives and experiences of RLDP participants in Canada. Understanding the participants’ perspectives and experiences as they are hired to, move through, and complete a rotational leadership development program has provided a more holistic perspective of organizational programming for the purposes of developing leadership capacity through job rotation. Applying a socio-constructivist worldview and employing the transcendental phenomenological research tradition, this qualitative study has sought to understand the lived experiences of nine RLDP participants in one diversified Canadian firm. Four major themes emerged from the data: (1) developing a strategic mindset, (2) dealing with ambiguity, (3) interacting with systems of support, and (4) exercising resiliency. Mezirow’s Transformative Learning Theory underpinned the theoretical framework for the study. In addition to providing scholarly contributions in the important and distinct research areas of job rotation, leadership development, and adult learning, the findings contribute to an emerging area of scholarship concerning rotational leadership development programs and provide future opportunities for extensive research in this novel area.
The origins of articulatory-motor influences on speech perception
Creators: name: Yeung, Ho Henny
Publisher: name: University of British Columbia
Year: 2010

description: Myriad factors influence perceptual processing, but “embodied” approaches assert that sensorimotor information about bodily movements plays an especially critical role. This view has precedence in speech research, where it has often been assumed that the movements of one’s articulators (i.e., the tongue, lips, jaw, etc.) are closely related to perceiving speech. Indeed, previous work has shown that speech perception is influenced by concurrent stimulation of speech motor cortex or by silently making articulatory motions (e.g., mouthing “pa”) when hearing speech sounds. Critics of embodied approaches claim instead that so-called articulatory influences are attributed to other processes (e.g., auditory imagery or feedback from phonological categories), which are also activated when making speech articulations. This dissertation explores the embodied basis of speech perception, and further investigates its ontogenetic development. Chapter 2 reports a study where adults made silent and synchronous speech-like articulations while listening to and identifying speech sounds. Results show that sensorimotor aspects of these movements (i.e., articulatory-motor information) are a robust source of perceptual modulation, independent from auditory imagery or phonological activation. Chapter 3 reports that even low-level, non-speech articulatory-motor information (i.e., holding one’s breath at a particular position in the vocal tract) can exert a subtle influence on adults’ perception of related speech sounds. Chapter 4 investigates the developmental origins of these influences, showing that low-level articulatory information can influence 4.5-month-old infants’ audiovisual speech perception. Specifically, achieving lip-shapes related to /i/ and /u/ vowels (while chewing or sucking, respectively) is shown to disrupt infants’ ability to match auditory speech information about these vowels to visual displays of talking faces. Together, these chapters show that aspects of speech processing are embodied and follow a pattern of differentiation in development. Before infants produce clear speech, links between low-level articulatory representations and speech perception are already in place. As adults, these links become more specific to sensorimotor information in dynamically coordinated articulations, but vestigial links to low-level articulatory-motor information remain from infancy.
title: IDENTIFICATION OF THE CAUSES AND EXTENT OF ELEVATED METHANE CONCENTRATIONS IN THE GROUNDWATER OF EASTERN KENTUCKY
Creators: name: Villa, Cristopher Alvarez
Publisher: name: University of Kentucky Libraries
Year: 2020
Subjects: subject: FOS: Earth and related environmental sciences

description: Recent development of unconventional oil and gas (UOG) resources has prompted concerns about its potential impact on public health and the quality of water and air resources. Elevated dissolved methane concentrations (> 1 mg/L) have been associated with proximity to UOG development and stray gas, but also with natural microbial activity. Baseline gas data, local hydrogeology and geochemistry context can aid assessment of methane sources and interactions. Methane concentrations in eastern Kentucky groundwater are above the “immediate action” level in some private/domestic water wells, show wide variations over small distances, and have been hypothesized to have different relationships to mining. This study suggests that groundwater in areas with extensive coal mining often has low methane concentrations due to sulfate production by pyrite oxidation. Microbial production of methane is common in groundwater, but sulfate-rich groundwater can limit methane production and sulfate-reducing conditions can be coupled with methane oxidation. Areas with a high density of oil and gas wells appear to be more likely to introduce thermogenic methane in groundwater. These results suggest that anthropogenic activities directly and indirectly influence geochemical conditions and methane distribution in groundwater in eastern Kentucky. Similar effects would be expected throughout the Appalachian Basin and in areas with different levels of mining and oil and gas development.
description: © 2020 Cristopher Alvarez Villa
Distributed source seeking with formation control of multi-agent systems
Creators: name: Ahmadi Barogh, Siavash
Publisher: name: Dr. Hut
Year: 2023
Subjects: subject: Multi-agent systems
subject: Formation control
subject: Source-seeking
subject: Gradient estimation
subject: distance-based formation control
classificationCode: 620
subject: Ingenieurwissenschaften

description: In dieser Arbeit wird ein neuer Ansatz zur kooperativen Lösung des Source Seeking Problems vorgestellt, der auf Methoden der Formationsregelung beruht. Zwei Arten der Formationsregelung - verschiebungsbasiert und entfernungsbasiert - werden dafür untersucht und für verschiedene Agentenmodelle angepasst. Die Stabilität der vorgeschlagenen Verfahren wird durch eine Lyapunov Stabilitätsanalyse gezeigt. Simulationsstudien demonstrieren die Leistungsfähigkeit der Methode. Eine experimentelle Validierung erfolgte durch Implementierung einer entfernungsbasierten Formationsregelung für Source Seeking auf einer Gruppe zweirädriger Roboter.
description: This thesis proposes a novel approach to the problem of cooperative source seeking based on formation control. Two types of formation control - displacement based and distance based - are considered and adapted to different agent models. A Lyapunov stability analysis of the proposed approach is given. The practicality of the method is demonstrated in simulation studies. In addition, the method has been validated experimentally by implementing a distance-based formation control scheme for source seeking by a group of wheeled robots.
Spectral domain optical coherence tomography system design : sensitivity fall-off and processing speed enhancement
Creators: name: Chan, Kenny K. H.
Publisher: name: University of British Columbia
Year: 2010

description: Spectral domain optical coherence tomography (SD-OCT) is an imaging modality that provides cross-sectional images with micrometer resolution. One major drawback of SD-OCT, however, is the depth dependent sensitivity fall-off by which image quality rapidly degrades in regions corresponding to deeper locations of the sample. This disadvantage is due to the finite spectral resolution of the hardware as well as the software reconstruction method that is used. SD-OCT employs a broadband light source for illumination and a spectrometer for signal detection. This system uses diffraction grating to separate spectral components by wavelengths (λ), which are then detected by a CCD array. The sensitivity fall-off is dependent on the spot size shining on the CCD, with respect to the pixel size of the CCD array. This hardware contribution to the fall-off can be minimized by careful design of the spectrometer. The software reconstruction is based mainly on the discrete Fourier transform (DFT) of the measured spectral data, which can be performed quickly using the widely accepted fast Fourier transform (FFT) algorithm, provided that the input is sampled uniformly in the wavenumber (k) domain. Due to the inverse relationship between k and λ, the data must be resampled to achieve a uniform spacing in k. Accuracy of the resampling method is important for the reconstruction, since the performance of the interpolation algorithm tends to degrade as the signal approaches the Nyquist sampling rate. This also causes a sensitivity fall-off for signals originating at greater depths, which corresponds to a higher modulation fringe frequency in the k domain. The goal of this thesis is to outline the development of a real-time SD-OCT imaging system that can deliver high quality images. The aim is to solve two major problems of current state-of-the-art SD-OCT systems, namely the depth dependent sensitivity fall-off and the image reconstruction time limitation. An SD-OCT system is demonstrated using a new reconstruction approach based on non-uniform fast Fourier transform (NUFFT). Using parallel computing techniques, our system can produce high quality images at over 100 frames per second with less than 12.5dB sensitivity fall-off over the full imaging range of 1.7mm.
title: Community participation in sustainable tourism development in Rose Blanche, Newfoundland and Labrador
Creators: name: Sarkar, Tanay Bhushon
Publisher: name: Memorial University of Newfoundland
Year: 2020

description: This research focuses on the community participation in sustainable tourism development in Rose Blanche, Newfoundland and Labrador, Canada. Rose Blanche is one of the six remaining small towns on Newfoundland and Labrador province’s Southwest shore. The traditional occupation of the local communities of Rose Blanche was fishing. When the fishing industry collapsed in Rose Blanche in 1990, and the town faced economic restructuring, it became clear that the ability of Rose Blanche to grow and provide employment opportunities to its community members can no longer depend solely on the fishing industry. Consequently, tourism has been identified as the most suitable alternative. In this research, participatory action research has been chosen as a research method to explore the attitudes and perceptions of local residents’ about tourism development in Rose Blanche; the community participation process in tourism planning and implementation; and the three main dimensions of tourism impact on the community: economic, socio-cultural and environmental. Eight policy recommendations for future sustainable tourism development in the research area are presented. Findings suggest that sustainable tourism development should be encouraged in the region, but that its potential is limited unless government is supportive of the process and the community members actively participate in the tourism development process by building tourism infrastructure and attracting off-season visitors. This research concludes that despite demographic and economic challenges, the tourism sector in Rose Blanche has the potential for further development, in the form of cruise ship tourism, camping, iceberg visitation and other resource-based activities. The local community’s perception of tourism and the additional environmental and societal aspects of tourism are positive in Rose Blanche, which is essential for its sustainable tourism development.
title: Characterization of CG34126: the Drosophila melanogaster homologue of a novel Parkinson Disease gene
Creators: name: Saddika, Tarana
Publisher: name: Memorial University of Newfoundland
Year: 2019

description: Parkinson Disease (PD) is a progressive and debilitating neurodegenerative disease characterized by the inadequate function or the loss of dopamine-producing neurons in the human midbrain. PD has a complex etiology including aberrant protein inclusion, mitochondrial dysfunction, oxidative stress, and defects in protein trafficking, which may occur due to genetic or non-genetic factors. Recently identified PD causative genes can be evaluated in model organisms, through which pathophysiological interactions with previously discovered PD genes may be determined. A new gene associated with PD, UHRF1BP1L, has a putative role in mitochondrial dynamics and protein homeostasis, similar to several other well-established PD genes. I investigated CG34126, the only homologue of UHRF1BP1L in Drosophila melanogaster, in an attempt to model PD using the UAS-GAL4 system of inducible gene expression in the dopaminergic neurons as well as during the development of the eye. In brief, RNAi-mediated knockdown of CG34126 can reduce lifespan and locomotor ability over time, and the overexpression of CG34126 directed by the Dopa decarboxylase (Ddc)-Gal4 transgene leads to reduced longevity and climbing ability throughout life. However, overexpression of CG34126 partially rescues the parkin-RNA-interference model of PD by increasing both longevity and locomotor ability over time. No neurodevelopmental defect was observed through a detailed biometric analysis of eye phenotypes, either from overexpression or knockdown of CG34126. As the altered ectopic expression of CG34126 can either positively or negatively influence ageing and locomotion, the consequences of altering UHRF1BP1L function in the fly contributes a better understanding of PD and general ageing mechanisms.
Analyse und Quantifizierung der frühen Eintrittsphase der HERV-K Viren in die Zelle
Creators: name: Schwotzer, Henriette
Publisher: name: Robert Koch-Institut
Year: 2019
Subjects: subject: 610 Medizin und Gesundheit

description: Der frühe Eintrittsprozess der HERV-K Viren weißt noch zahlreiche Fragen auf. Endgültige Untersuchungen in Bezug auf den Entry-Prozess konnten noch nicht getroffen werden. Daher sind Fragen über die Kinetik des intrazellulären Transports oder die Bildung replikationskompetenter Viren nicht endgültig geklärt.[1][2] Durch die Rekonstruktion einer möglichen Wildtypsequenz durch Rückmutationen und einer Codonoptimierung wurde die Expression viraler Proteine verstärkt.[3] Basierend auf der viralen Wildtypsequenz soll, im Rahmen dieser Arbeit, der Entry-Prozess mit Hilfe fluoreszenzmarkierter Proteine verfolgt werden. Es handelt sich dabei um ein mit mCherry markiertes oricoGag. Die Auswertung erfolgt dabei durch das FACS und durch lichtmikroskopische Untersuchungen. Fluoreszenzmarkierte Proteine sind für Untersuchungen von viralen Proteinen und intrazellulären Strukturen gut geeignet. Die Herstellung von fluoreszenzmarkierten reifen und unreifen virus-like particles sollte die Unterschiede während des Eindringens in die Wirtszelle aufzeigen. Reife VLPs werden durch die Protease gebildet, zerfallen, wenn sie in das Cytoplasma gelangen, sehr schnell. Der Vermutung, ob unreife VLPs länger im Cytoplasma bestehen können, sollte nachgegangen werden. Zusätzlich sollten Untersuchen über die Eintrittsphase durch das infektiöse Glycoprotein VSV-G und der nicht infektiösen Mutante VSV-Gmut erfolgen. Es konnte in dieser Arbeit gezeigt werden, dass fluoreszenzmarkierte VLPs erzeugt werden können. Die Ausbeute an fluoreszenzmarkierte VLPs, in denen keine Protease enthalten ist, konnte in nicht ausreichenden Mengen produziert werden. Weiterhin konnte gezeigt werden, dass eine Mutante des VSV-G Hüllprotein, welches zur Pseudotypisierung benutzt wurde, dieses Glycoprotein funktionslos macht. Mittels ELISA und PERT konnten die VLPPräparationen mit einander verglichen werden. Dadurch war es möglich die definierte Menge an VLPs mit einem funktionellen Env bzw. der Kontrolle mit nicht-infektiösem Env, für Infektionsversuche einzusetzen. Es konnte weiterhin gezeigt werden, dass die Fluoreszenzintensität mit VSV-G über einen bestimmten Zeitpunkt verstärkt wird, während es bei VSV-Gmut zu keinen Änderungen gekommen ist.
Magnetically-driven electronic phase separation in the semimetallic ferromagnet EuB$_6$
Creators: name: Das, P.
name: Amyan, A.
name: Brandenburrg, J.
name: Müller, J.
name: Xiong, P.
name: von Molnár, S.
name: Fisk, Z.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: From measurements of fluctuation spectroscopy and weak nonlinear transport on the semimetallic ferromagnet EuB$_6$ we find direct evidence for magnetically-driven electronic phase separation consistent with the picture of percolation of magnetic polarons (MP), which form highly conducting magnetically-ordered clusters in a paramagnetic and 'poorly conducting' background. These different parts of the conducting network are probed separately by the noise spectroscopy/nonlinear transport and the conventional linear resistivity. We suggest a comprehensive and 'universal' scenario for the MP percolation, which occurs at a critical magnetization either induced by ferromagnetic order at zero field or externally applied magnetic fields in the paramagentic region.
Epigenetic Memory of COVID-19 in Innate Immune Cells and Their Progenitors
Creators: name: Gyu, Jin
Publisher: name: Zenodo
Year: 2023

description: These are codes used for the analysis in the manuscript titled "Epigenetic Memory of COVID-19 in Innate Immune Cells an­­­­­d Their Progenitors" in Cell. It is also accessible from https://github.com/sharmasiddhartha231/Final_Covid19_Scripts
title: Dental Hygiene Manpower Distribution in Virginia
Creators: name: Nielsen, Christine Ann
Publisher: name: Old Dominion University Libraries
Year: 1990

description: The purpose of this investig~tion was to conduct a comprehensive dental hygiene manpower study in the Commonwealth of Virginia. Data were collected to establish the present number of dental hygienists and dentists in Virginia; the estimated number of practicing and nonpracticing dental hygienists and dentists in Virginia; and the past, present and forecasted employment opportunities for dental hygienists in Virginia. Primary and secondary data were collected via professional associations, state regulatory boards, health agencies, employment and educational commissions and labor statistics bureaus. Frequency distributions were used to analyze the data. Results suggest that there is an adequate supply of dental hygiene manpower to meet the demand for dental hygienists in the Commonwealth of Virginia. Three areas in Virginia exhibit a surplus of dental hygiene manpower, and eight areas exhibit a deficit of dental hygiene manpower suggesting a manpower maldistribution rather than a manpower shortage. Recommendations to address the dental hygiene manpower maldistribution include recruitment efforts targeting non-practicing dental hygienists and potential students, attracting dental hygiene manpower from surplus areas to deficient areas, making dental hygiene employment opportunities more attractive and supporting existing educational standards for dental hygienists in Virginia. These aforementioned recommendations could increase the public's access to dental hygiene care in Virginia.
U-Turn Diffusion
Creators: name: Behjoo, Hamidreza
name: Chertkov, Michael
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: We investigate diffusion models generating synthetic samples from the probability distribution represented by the Ground Truth (GT) samples. We focus on how GT sample information is encoded in the Score Function (SF), computed (not simulated) from the Wiener-Ito (WI) linear forward process in the artifical time $t\in [0\to \infty]$, and then used as a nonlinear drift in the simulated WI reverse process with $t\in [\infty\to 0]$. We propose U-Turn diffusion, an augmentation of a pre-trained diffusion model, which shortens the forward and reverse processes to $t\in [0\to T_u]$ and $t\in [T_u\to 0]$. The U-Turn reverse process is initialized at $T_u$ with a sample from the probability distribution of the forward process (initialized at $t=0$ with a GT sample) ensuring a detailed balance relation between the shorten forward and reverse processes. Our experiments on the class-conditioned SF of the ImageNet dataset and the multi-class, single SF of the CIFAR-10 dataset reveal a critical Memorization Time $ T_m $, beyond which generated samples diverge from the GT sample used to initialize the U-Turn scheme, and a Speciation Time $ T_s $, where for $ T_u > T_s > T_m $, samples begin representing different classes. We further examine the role of SF non-linearity through a Gaussian Test, comparing empirical and Gaussian-approximated U-Turn auto-correlation functions, and showing that the SF becomes effectively affine for $ t > T_s $, and approximately affine for $t\in [T_m,T_s]$.
Crystal Chemistry and Structure of Anomalous Birefringent Cubic Uvarovite Garnet, Ideally Ca3Cr2Si3O12
Creators: name: Salvador, Jeffrey
Publisher: name: Graduate Studies
Year: 2017
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences
subject: Mineralogy
subject: Uvarovite

description: Anomalous birefringent uvarovite (Uv) garnets from the Ural Mountains, Russia (SAR-1, SAR-2, and SKR-1), Zermatt, Switzerland (STZ-1), Jacksonville, Tuolumne County, California (JTC-1), and Outokumpu, Finland (FIN-1) were analyzed using synchrotron high-resolution powder X-ray diffraction (HRPXRD) and electron microprobe analysis (EMPA) in order to understand the crystal chemistry and structure that causes the occurrence of optical anisotropy. HRPXRD detected the existence of fine scale intergrowths of two (SAR-2, STZ-1, and JTC-1), three (SAR-1), and up to four (FIN-1) additional cubic phases of Uv, with slight changes in the a unit-cell parameter representative of distinct chemical compositional phases obtained by EMP analyses. The a unit-cell parameter ranges from 11.91425(2) Å in SAR-1b to 12.05305(2) Å in JTC-4a and based on the garnet end-member composition, uvarovite ranges from Uv9Adr88Grs2 in JTC-4a to Uv71Grs24Sps1 in FIN-6a. Rietveld refinement X-ray diffraction traces show no deviation from cubic symmetry and reveal consistent peak profiles with the appearance of broadening and asymmetrical peak effects caused by the existence of additional microscopic cubic uvarovite phases intergrown together. These multiphase intergrowths contain strain derived from lattice mismatch of slightly different a unit-cell parameters against boundary contacts between phases and ultimately give rise to the observed birefringence in uvarovite, and possibly to other garnet end-member species.
An elementary proof of Bridy's theorem
Creators: name: Rowland, Eric
name: Stipulanti, Manon
name: Yassawi, Reem
Publisher: name: arXiv
Year: 2023
Subjects: subject: Number Theory (math.NT)
subject: Formal Languages and Automata Theory (cs.FL)
subject: Symbolic Computation (cs.SC)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 11B85, 13F25, 14H05

description: Christol's theorem states that a power series with coefficients in a finite field is algebraic if and only if its coefficient sequence is automatic. A natural question is how the size of a polynomial describing such a sequence relates to the size of an automaton describing the same sequence. Bridy used tools from algebraic geometry to bound the size of the minimal automaton for a sequence, given its minimal polynomial. We produce a new proof of Bridy's bound by embedding algebraic sequences as diagonals of rational functions.
description: 31 pages, 2 figures, 2 tables; publication version
A study of energy concentration and drain in incompressible fluids
Creators: name: Shvydkoy, Roman
Publisher: name: arXiv
Year: 2012
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: Primary:76B03, Secondary:35Q31

description: In this paper we examine two opposite scenarios of energy behavior for solutions of the Euler equation. We show that if $u$ is a regular solution on a time interval $[0,T)$ and if $u \in L^rL^\infty$ for some $r\geq \frac{2}{N}+1$, where $N$ is the dimension of the fluid, then the energy at the time $T$ cannot concentrate on a set of Hausdorff dimension samller than $N - \frac{2}{r-1}$. The same holds for solutions of the three-dimensional Navier-Stokes equation in the range $5/30$. The results are applied to find new exclusions of locally self-similar blow-up in cases not covered previously in the literature.
description: an update of the previous version
Creating a Culture of Inclusion in Pre-Kindergarten: An Integral Analysis of Beliefs, Understandings, and Pedagogical Practices of Early Childhood Educators
Creators: name: Prytuluk, Natalie Anne
Publisher: name: Graduate Studies
Year: 2017
Subjects: subject: Education--Early Childhood
subject: Education--Special
subject: early childhood
subject: inclusion
subject: pre-kindergarten
subject: preschool
subject: special education
subject: Pedagogy
subject: early childhood education
subject: Integral Theory

description: In the province of Alberta, Canada, early childhood education is undergoing change to reconceptualize pre-kindergarten programming so that it is inclusive of all children in light of postmodern views and theoretical perspectives about inclusion and the impact of experiences, relationships, environment, and culture on learning. The purpose of this study was to understand how beliefs, understandings, and pedagogical practices of early childhood educators affect, and are affected by, their relationships with children, classroom team members, parents, and colleagues, as they create an inclusive culture in a pre-kindergarten classroom. Four research questions were addressed in the study: • What do early childhood educators believe and understand about creating a classroom culture that includes all children? • How are early childhood educators affected by, and how do they affect perspectives shared by children, classroom team members, colleagues, and parents in the creation of an inclusive classroom culture? • What pedagogical practices do early childhood educators use to include all children? • How are early childhood educators affected by system level structures and processes in the creation of an inclusive classroom culture? To explore the research problem from multiple perspectives, Integral theory (Wilber, 2006) was selected as the conceptual framework and Integral Methodological Pluralism (IMP) was employed in the research design. Data about educational experiences, culture, behaviours and systems, were collected from five early childhood educators in pre-kindergarten classrooms in four urban schools, followed by a questionnaire of classroom practices, document analysis, and a focus group. Findings revealed that early childhood educators’ positive beliefs toward inclusion, a social constructivist theoretical perspective, building strong relationships with children, parents, team and colleagues, and eight characteristics describing the disposition of an early childhood educator were important to create an inclusive classroom culture. Six pedagogical practices that support inclusion are defined, and supports from schools and government necessary for creation of inclusive classroom cultures are identified. Implications for policies and regulations to support inclusion, pre-kindergarten programming and early childhood educators are discussed.
Exploring the NANOGrav Signal and Planet-mass Primordial Black Holes through Higgs Inflation
Creators: name: Yi, Zhu
name: You, Zhi-Qiang
name: Wu, You
name: Chen, Zu-Cheng
name: Liu, Lang
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The data recently released by the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) provides compelling evidence supporting the existence of a stochastic signal that aligns with a gravitational-wave background. We show that the scalar-induced gravitational waves from the Higgs inflation model with the parametric amplification mechanism can explain this signal. Such a gravitational-wave background naturally predicts the substantial existence of planet-mass primordial black holes, which can be planet 9 in our solar system and the lensing objects for the ultrashort-timescale microlensing events observed by the Optical Gravitational Lensing Experiment. Therefore, the NANOGrav signal, the potential Planet 9 in our solar system, and the Optical Gravitational Lensing Experiment can be explained within the framework of Higgs inflation.
description: 23 pages, 3 figures, accepted by JCAP
Computação Inteligente - Conceitos, Aplicações e Desenvolvimento
Creators: name: Pacheco, André G. C.
name: Meira, Guilherme T.
name: Manso, Giuliano L.
Publisher: name: Zenodo
Year: 2019
Subjects: Computação inteligente, aprendizado de máquina, machine learning, inteligência computacional, análise de dados, visão computacional, inteligência artificial

description: Computação inteligente é um blog que foi fundado em 2015 e surgiu com a intenção de prover conteúdo na área de inteligência artificial em português Brasileiro. Atualmente a maioria do conteúdo que envolve inteligência computacional, machine learning, deep learning, análise de dados, etc… está em inglês. E sabemos que, principalmente alunos de graduação, infelizmente não dominam a língua inglesa a ponto de se sentirem confortáveis em estudar esse tipo de conteúdo. Sem contar que conversar, interagir e estudar em nossa língua materna é algo muito mais fácil e prático. Portanto, a primeira premissa aqui é utilizar o nosso português brasileiro. Obviamente, há situações em que um termo não é traduzível ou não é adequado traduzir. Nesses casos, utilizaremos o termo original mas sempre mostrando uma tradução livre.

A segunda premissa do blog é utilizar um linguajar simples, direto e didático. Muitas das vezes, os conteúdos de área são repletos de termos díficeis, muita matemática e estatística etc. A intenção do blog é simplificar ao máximo. É claro, que se você quer se aventurar nessa área, você sabe que vai precisar estudar conceitos profundos. Mas, muitas vezes analogias, imagens, e um linguajar mais simples, é o divisor de águas entre a comprensão e a dúvida.

A terceira premissa é que tudo que é discutido aqui será aberto e livre para uso não comercial. Portanto, se você encontrou um código e quer utilizá-lo, sinta-se livre. Mas lembre-se sempre de dar créditos a quem merece crédito!

Portanto, de maneira resumida, o blog visa ensinar de maneira simples, livre e em português brasileiro. Os posts são divididos em categorias que você encontra no topo da página principal. E caso possua sugestões ou críticas, estamos totalmente dispostos à ouvi-las! Entre em contato conosco via twitter, email ou comentários nos posts, sinta-se a vontade. Esperamos que com nosso conteúdo possa ajudá-lo de alguma forma.

Acesse: http://computacaointeligente.com.br
title: Dispersed oil fingerprinting in marine environments
Creators: name: Song, Xing
Publisher: name: Memorial University of Newfoundland
Year: 2019

description: The occurrence of offshore oil spills can induce various negative effects on marine environments. Oil fingerprinting is a key technology to identify the sources of crude oil and associated refined products spilled into the environments. Spill oil fingerprinting can be achieved by investigating the diagnostic relationships among specific hydrocarbons, known as biomarkers. Biomarkers in oils can be uniquely distributed to pinpoint the oil geographic source and weathering status.
 Dispersants are widely used marine oil spill treatment agents, containing surfactants and solvents. It can reduce interfacial tension between oil and seawater by enhancing the generation of small and stable oil-surfactant micelles (i.e., oil-in-water emulsion). By using dispersants, the spilled oil in a water emulsion bridged by surfactants, called chemically dispersed oil (CDO), can dwell in seawater for a longer period under proper conditions. CDO fingerprinting is essential for assessment of its environmental impact, selection of further response countermeasures, and for a better understanding of the fate and behaviors of CDO in marine environments.
 However, dispersant application could change the physicochemical properties of spilled oil, which is challenging for the applicability of current environmental forensics for CDO fingerprint and limits the research on the topic reported. To address this challenge, this thesis carried out investigations on dispersed oil fingerprinting in marine environments in the following aspects: 1) investigation of the applicability of existing typical biomarkers for fingerprinting of short-term weathered CDO, 2) identification of relatively long-term weathered CDO through screening eight types of aliphatic and aromatic biomarkers, 3) differentiation of CDO from non-dispersed oil using principal component analysis, 4) assessment of the impacts of biodegradation of weathered dispersed oil (treated by a shrimp-waste based new dispersant) on fingerprinting of CDO, and 5) comprehensive evaluation of environmental factors on CDO fingerprinting. The research outputs lead to a group of identified biomarkers for effective dispersed oil identification and oil weathering assessment, a better understanding of the characteristics of spilled oil treated by dispersants, and a more robust means for tracking fate and behaviors of CDO in marine environments.
Greater distractor interference during vertical saccades : the time course of horizontal, vertical, and oblique saccadic curvature
Creators: name: Laidlaw, Kaitlin Elizabeth Wiggins
Publisher: name: University of British Columbia
Year: 2010

description: In three studies, we characterize the effect of a nearby distractor on vertical, horizontal and oblique saccadic curvature under normal saccade preparation times. In Experiments 1 and 2, participants made saccades to targets in the presence or absence of a nearby distractor. Consistent with previous findings, longer-latency vertical saccades showed greater curvature away from a distractor than did oblique or horizontal saccades. At short latencies, vertical saccades showed greater curvature towards the distractor. We propose that vertical saccades may be prone to greater distractor interference due to the superior colliculus, a midbrain region implicated in attentional and saccadic shifts, under-representing vertical target objects, which results in a relative over-representation of non-vertical distractor objects. In Experiment 3, we tested this hypothesis by having participants make saccades to vertical or horizontal targets in the presence or absence of bright or dim distractors. We reasoned that weaker representations for vertical targets would allow for greater interference from nearby distractors, which would be especially pronounced when distractors are highly salient. Consistent with this prediction, we found that only the trajectory of vertical saccades was modulated by distractor luminance.
Direct experimental observation of binary agglomerates in complex plasmas
Creators: name: Chaudhuri, M.
name: Nosenko, V.
name: Knapek, C.
name: Konopka, U.
name: Ivlev, A. V.
name: Thomas, H. M.
name: Morfill, G. E.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: A defocusing imaging technique has been used as a diagnostic to identify binary agglomerates (dimers) in complex plasmas. Quasi-two-dimensional plasma crystal consisting of monodisperse spheres and binary agglomerates has been created where the agglomerated particles levitate just below the spherical particles without forming vertical pairs. Unlike spherical particles, the defocused images of binary agglomerates show distinct, stationary/periodically rotating interference fringe patterns. The results can be of fundamental importance for future experiments on complex plasmas.
ANALYSIS OF THE KIDNEY CONDITION IN NEWBORNS FROM MOTHERS WITH CYTOMEGALOVIRUS INFECTION
Creators: name: Khazratkulova, Mashkhura
name: Dilmuradova, Clara
Publisher: name: Zenodo
Year: 2023

description: One of the causes of kidney damage that occurs during pregnancy and childbirth is fetal infections, among which cytomegalovirus infection takes one of the leading places. 50 babies born in 2022-2023 were observed in the Samarkand Regional Perinatal Center and maternity complex No. 1, 30 of them were born to mothers with cytomegalovirus infection, and 20 were compared with healthy babies born to mothers with no MVI infection was studied. From the results of the examination, it was found that the increase of the NGAL biomarker in urine and blood serum can increase the risk of urinary tract inflammation in the later periods of the baby's life.