cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The reproduction, establishment, and growth of white spruce in the forest tundra ecotone of the Inuvik-Tuktoyaktuk region
Creators: name: Walker, Xanthe
Publisher: name: University of British Columbia
Year: 2010

description: Climate is considered one of the most important factors controlling tree reproduction, establishment, and growth at the treeline. As climate change continues the latitudinal treeline is expected to shift northwards. The main objective of this research was to characterize the ecological patterns and processes of Picea glauca (Moench.) Voss. (white spruce) in the Tuktoyaktuk region of the Northwest Territories, Canada. In particular, this study aims to determine how climate influences white spruce tree reproduction, establishment, and growth throughout the forest-tundra transition zone. A total of four forest stand sites and eight tree island sites, examined in the early 1990s, were located and re-examined in the summer of 2009. Cone production has increased since the early 1990s and cone production decreases northward across the forest-tundra. Germination rates significantly decrease with increasing latitude but have not significantly changed since they were last examined 15 years ago. In June 1994 seedlings were transplanted at three tree island sites, survivorship of these seedlings ranged from 3 to 20%. A search for true seedlings was also completed, however, none were found. Basal cores were obtained from numerous individuals within each of the sites and an age structure was developed. Establishment of individuals coincided with decades classified as cool and wet. The yearly diameter growth of each tree was determined via ring width measurements and using principal component analysis two chronologies were built, one for forest stands and one for tree islands. The chronologies were correlated to climate data of temperature and precipitation from the Inuvik airport. In general, growth was negatively correlated to previous growing season temperature and positively correlated to current season temperature. Results from this study indicate that tree islands are not likely to be important in supplying viable seed for the infilling of trees in the forest tundra, rather infilling will more likely occur from increased seed production in trees at or just south of treeline. Under proposed climate change scenarios the establishment of new seedlings will likely be negatively affected by the warmer and drier conditions, whereas the radial growth of individuals will likely increase with warming temperatures.
Pipeline Corrosion and Coating Failure under Alternating Current Interference
Creators: name: Kuang, Da
Publisher: name: Graduate Studies
Year: 2016
Subjects: Engineering--Mechanical

description: The results demonstrate that the size of the defect is critical to AC corrosion of steel occurring at the defect base. Generally, circular and triangular defects are associated with the most and least negative direct current (DC) potentials as well as the largest and smallest anodic current densities, respectively. Local pits can be initiated on the steel at sufficiently high AC current densities in both high pH and neutral pH solutions. Mechanistic models are proposed to illustrate the pitting initiation in the presence of AC, where AC can affect passive film or corrosion product layer formed on the steel. Furthermore, the effect of AC on the properties and performance of epoxy coatings was studied in a simulated soil solution and a conceptual model was developed to illustrate the mechanistic aspect of AC induced coating degradation. The applied CP can be shielded by coating disbondment through monitoring the local potential and solution pH under disbonded coating on a steel. Then the CP shielding behavior of pipeline coatings, i.e., high density polyethylene (HDPE) and FBE, was investigated. The structure of HDPE does not change upon CP permeating test. Conversely, there are obvious changes of the functional groups in FBE. Water uptakes into the coating occur continuously with time. The CP permeation through FBE coating is time dependent. Moreover, the effect of AC interference on the CP permeation into the disbonding crevice was investigated. At small AC current densities, AC results in an enhancement of permeation of CP current into the crevice. However, with the increase of AC current density, corrosion product generates and deposits in the solution, blocking the ionic diffusion and CP permeation. Finally, the effects of AC interference on CP potential and performance were investigated. Results demonstrated that the shift of CP potential depends on the CP level and AC current density. No matter if the DC potential of the steel is shifted negatively or positively upon application of AC, the steel suffers from increased corrosion.
HI Absorption Measurements and Kinematic Distances to 34 Supernova Remnants
Creators: name: Ranasinghe, Sujith Yasantha
Publisher: name: Graduate Studies
Year: 2017
Subjects: Astronomy and Astrophysics

description: Accurate distances to supernova remnants (SNRs) are crucial in determining their size, age, luminosity and evolutionary state. To determine distances, 34 bright SNRs were chosen from the VLA Galactic Plane Survey (VGPS) to extract HI absorption spectra. Analyzing the HI absorption and 13CO emission spectra, HI and 13CO channel maps, distances to the 34 SNRs were calculated. To estimate a distance, an accurate rotation curve is essential in order to obtain orbital velocities V(R). The orbital velocities obtained by the tangent point method were compared with the Universal Rotation Curve as a test of its validity. From the analysis 12 new, 9 changed, 6 revised and 7 confirmed distances are presented. Furthermore, the selection effects of the study sample is discussed. The surface density of SNRs were calculated and found to be proportional to the density of stars. The validity of the Σ-D relation of estimating distances is discussed.
Alucinaciones persistentes y glioma de bajo grado en región insular: a propósito de un caso
Creators: name: Latorre Forcen, Patricia
name: Laporta Herrero, Isabel
name: Vives Hidalgo, Eric
name: Belló Pérez, Sofía
name: Villodres Moreno, Marta
Publisher: name: Psicosomàtica y Psiquiatría
Year: 2021

description: Psicosomàtica y Psiquiatría, Núm. 16 (2021)
Integrable Hamiltonian systems with incomplete flows and Newton's polygons
Creators: name: Kudryavtseva, Elena A.
name: Lepsky, Timur A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Differential Geometry (math.DG)
subject: Dynamical Systems (math.DS)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 37J05, 37J35

description: We study the Hamiltonian vector field $v=(-\partial f/\partial w,\partial f/\partial z)$ on $\mathbb C^2$, where $f=f(z,w)$ is a polynomial in two complex variables, which is non-degenerate with respect to its Newton's polygon. We introduce coordinates in four-dimensional neighbourhoods of the "points at infinity", in which the function $f(z,w)$ and the 2-form $dz\wedge dw$ have a canonical form. A compactification of a four-dimensional neighbourhood of the non-singular level set $T_0=f^{-1}(0)$ of $f$ is constructed. The singularity types of the vector field $v|_{T_0}$ at the "points at infinity" in terms of Newton's polygon are determined.
description: 14 pages, 6 figures, in Russian, Proceedings of International Conference "Metric geometry of surfaces and polytopes" (Moscow, Aug. 2010)
Más allá de la basura: a propósito de un caso.
Creators: name: Yárnoz-Goñi, Nora
name: Ruiz Ruiz, Raquel
name: Goñi-Sarries, Adriana
name: Gutiérrez Talavera, Gerardo
Publisher: name: Psicosomàtica y Psiquiatría
Year: 2021

description: Psicosomàtica y Psiquiatría, Núm. 16 (2021)
Ideación suicida reactiva a patología somática
Creators: name: Huergo Lora, Covadonga
name: Fernández García, Graciano
name: Ocio León, Sergio
name: Gómez Simón, Manuel
name: González Suárez, Aida
name: López Fernández, Jaime
name: Lago García, Laura
name: Valtueña García, Mercedes
name: Ludwig, Carina
Publisher: name: Psicosomàtica y Psiquiatría
Year: 2021

description: Psicosomàtica y Psiquiatría, Núm. 16 (2021)
Four Canadian Expatriate Women’s Personal History Self-Study Stories on their International-Mindedness (IM) Development and Approaches to Teaching IM
Creators: name: Pitre, Natalie
Publisher: name: Graduate Studies
Year: 2015
Subjects: subject: Education--Language and Literature
subject: international-mindedness
subject: cultural self-study
subject: self-study in education

description: The purpose of this study was to learn how Canadian expatriate educators, in International Baccalaureate Diploma Programs (IBDP) abroad, could use personal history self-study as a reflective process for understanding their own international-mindedness (IM) development. An additional focus of this study was to understand how participants use this knowledge to make pedagogical decisions about leading their students to develop IB Learner Profile characteristics to become internationally-minded through their English Language B and English A: Language and literature courses. Darla Deardorff’s (2006; 2009) Process Model of Intercultural Competence was used as the theoretical framework for this study to identify the attitudes, knowledge and comprehension, and skills that these educators have acquired through cross-cultural learning experiences while living abroad, leading to cultural self-awareness, and how the ethnorelative views that they possess influence the ways they teach international-mindedness to students’ in four unique contexts: one public school in China, one public school in Azerbaijan, one international school in Singapore, and one international school in the Philippines. Personal history self-study in education was used as the methodology for this study. Data for this study was collected online using D2L during one school semester spanning six months. An adapted version of Weigl’s (2009) cultural self-study method was used to elicit stories on the development of cultural self-awareness of the participants’ and my reflection on professional practice questions were used to examine the ways that their intercultural competence contributes to their pedagogical choices to teach IM in their classrooms. As a co-learner in this study, I shared cultural self-study stories with participants to establish trust, develop a sense of how the participants experience the research process, and to gain a sense of the possible braiding of themes across stories. Findings of this study revealed that the intercultural skills that the participants possessed influenced their pedagogical decisions to foster intercultural understanding among students in their lessons. Barriers that were identified in leading students to become internationally-minded include: school context, students’ cultural understanding of the IBDP Western-based programming model, and capacity to adapt to the aims of the programme.
Global existence result for pair diffusion models
Creators: name: Glitzky, Annegret
name: Hünlich, Rolf
Publisher: name: Weierstrass Institute
Year: 2002
Subjects: subject: Reaction-diffusion systems for charged particles
subject: pair diffusion models
subject: global existence
subject: a priori estimates
subject: fixed point theorems
subject: 35K45
subject: 35K57
subject: 35R05
subject: 35D05
subject: 35B45
subject: 80A30

description: In this paper we prove a global existence result for pair diffusion models in two dimensions. Such models describe the transport of charged particles in semiconductor heterostructures. The underlying model equations are continuity equations for mobile and immobile species coupled with a nonlinear Poisson equation. The continuity equations for the mobile species are nonlinear parabolic PDEs involving drift, diffusion and reaction terms, the corresponding equations for the immobile species are ODEs containing reaction terms only. Forced by applications to semiconductor technology these equations have to be considered with non-smooth data and kinetic coefficients additionally depending on the state variables. Our proof is based on regularizations, on a priori estimates which are obtained by energy estimates and Moser iteration as well as on existence results for the regularized problems. These are obtained by applying the Banach Fixed Point Theorem for the equations of the immobile species, and the Schauder Fixed Point Theorem for the equations of the mobile species.
Real-Time Dynamics of a Spin Chain with Dzyaloshinskii-Moriya Interactions: Spiral Formation and Quantum Spin Oscillations
Creators: name: Solano-Carrillo, E.
name: Franco, R.
name: Silva-Valencia, J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We studied the non-equilibrium short-time dynamics of a spin-1/2 chain with Dzyaloshinskii-Moriya interactions after a sudden quench by a transverse field. We found that inhomogeneous spin-spirals with opposite chiralities propagate from the edges towards the center of the chain. This propagation is accompanied by quantum spin oscillations which decay asymptotically with time. A theoretical description of this phenomenon is given to a good accuracy with the help of numerical calculations with the adaptive time-dependent density matrix renormalization group algorithm.
description: 10 pages, 9 figures
"Maintaining the Mobility of the Corps:" Horses, Mules, and the Canadian Army Veterinary Corps in the Great War
Creators: name: McEwen, Andrew
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: History--Canadian
subject: History--Military
subject: Veterinary history
subject: Canadian military history
subject: First World War
subject: Boer War
subject: horses
subject: Canadian Army Veterinary Corps

description: Animal transportation played a crucial role in the Canadian Expeditionary Force (CEF) during the Great War. In an era of growing mechanization and technological development, horses and mules still provided the overwhelming bulk of draught power in the combat zone. They hauled artillery, supplies, and ambulances, packed ammunition, served as officers’ riding mounts, and chargers for cavalrymen. By the Armistice of 11 November 1918, the CEF alone utilized 24,134 horses and mules in France and Belgium. The task of overseeing their health and working efficiency fell to just a few officers and enlisted personnel of the Canadian Army Veterinary Corps (CAVC). Only 73 Veterinary Officers and 780 Other Ranks presided over this truly living and breathing transportation system. They treated diseases, wounds, exhaustion, malnourishment, and exposure to the elements. They saved what animals they could, and humanely destroyed those they could not. They were, in the words of Canadian Corps commander Lieutenant-General Sir Arthur Currie, essential for “maintaining the mobility of the Corps.” However, their contributions remain largely overlooked in the prevailing historiography. Neither the multifaceted literature exploring the conflict’s impact on Canadian society, nor the considerable scholarship on the CEF in France and Flanders, seriously considers the role played by Canadian horses and veterinarians in the war. A few monographs, book chapters, and journal articles acknowledge these crucial facets, though they too remain largely insular and do not connect the services of horses and veterinarians to the war’s broader chronology. This dissertation seeks to redress such omissions. It argues that Canada’s horses and mules, and the veterinary efforts to keep them healthy, exerted a clear impact on combat operations in the Great War. It explores their foundations in pre-war society Canadian to understand how both became key facets of the Dominion’s war effort, and further emphasizes the broader British Imperial context both served within overseas. Utilizing a broad array of war diaries, weekly casualty reports, government publications, internal correspondence, and contemporary periodicals from Canadian and British sources alike, this study exhibits how horses, mules, and veterinarians critically impacted Canada’s Great War experience.
Byte your tongue : a computational model of human mandibular-lingual biomechanics for biomedical applications
Creators: name: Stavness, Ian Kent
Publisher: name: University of British Columbia
Year: 2010

description: Biomechanical models provide a means to analyze movement and forces in highly complex anatomical systems. Models can be used to explain cause and effect in normal body function as well as in abnormal cases where underlying causes of dysfunction can be clarified. In addition, computer models can be used to simulate surgical changes to bone and muscle structure allowing for prediction of functional and aesthetic outcomes. This dissertation proposes a state-of-the-art model of coupled jaw-tongue-hyoid biomechanics for simulating combined jaw and tongue motor tasks, such as chewing, swallowing, and speaking. Simulation results demonstrate that mechanical coupling of tongue muscles acting on the jaw and jaw muscles acting on the tongue are significant and should be considered in orofacial modeling studies. Towards validation of the model, simulated tongue velocity and tongue-palate pressure are consistent with published measurements. Inverse simulation methods are also discussed along with the implementation of a technique to automatically compute muscle activations for tracking a target kinematic trajectory for coupled skeletal and soft-tissue models. Additional target parameters, such as dynamic constraint forces and stiffness, are included in the inverse formulation to control muscle activation predictions in redundant models. Simulation results for moving and deforming muscular-hydrostat models are consistent with published theoretical proposals. Also, muscle activations predicted for lateral jaw movement are consistent with published literature on jaw physiology. As an illustrative case study, models of segmental jaw surgery with and without reconstruction are developed. The models are used to simulate clinically observed functional deficits in movement and bite force production. The inverse simulation tools are used to predict muscle forces that could theoretically be used by a patient to compensate for functional deficits following jaw surgery. The modeling tools developed and demonstrated in this dissertation provide a foundation for future studies of orofacial function and biomedical applications in oral and maxillofacial surgery and treatment.
Liver Lesion Diagnosis Challenge on Multi-phase MRI
Creators: name: Lou, Meng
name: Xiaoqing Liu
name: Yuqing Zhang
name: Yizhou Yu
name: Zhou, Hong-Yu
Publisher: name: Zenodo
Year: 2023
Subjects: Liver Lesion
Multi-phase MRI
Diagnosis
Classification
MICCAI Challenges

description: Liver cancer remains one of the most severe diseases threatening human health globally. Early diagnosis plays an important role in improving the survival rate and reducing patient suffering. In clinical practice, multi-phase contrast-enhanced magnetic resonance imaging (MRI) can deliver more accurate liver lesion diagnosis, as there is more detailed visual information such as clearer blood vessels, mediastinum, and different image enhancement manners of various lesions. However, liver lesion diagnosis in 3D multi-phase images is a challenging task since liver lesion has variant shape, diverse size, irregular boundaries, and low signal-to-noise ratio. Meanwhile, each phase exhibits different image properties such as intensity and contrast, that is, each phase reflects different lesion characteristics. Moreover, to the best of our knowledge, there is no publicly available dataset of liver lesions with multi-phase MR scans, which limits the development of automatic computer-aided diagnosis (CAD) systems for multi-phase liver lesion identification. We plan to host the first Liver Lesion Diagnosis Challenge on Multi-phase MRI (termed LLD- MMRI2023) to promote the research of such CAD systems. In our challenge, 498 multi-phase MRI lesion cases are publicly released, which are carefully annotated by 3 experienced radiologists. Each case comprises 8 different phases, including the non-contrast phase, arterial phase, venous phase, delay phase, T2-weighted imaging phase, diffusion-weighted imaging phase, T1 in-phase, and T1 out-of-phase. We assigned 316cases for training, 78 cases for validation, and 104 cases for testing. The classification performance is reported with F1-score and Cohen's Kappa coefficient.
Radiation Dosimetry in the Presence of Gold Nanoparticles
Creators: name: Koger, Brandon
Publisher: name: Graduate Studies
Year: 2017
Subjects: subject: Biophysics--Medical
subject: Physics
subject: Physics--Radiation
subject: gold nanoparticles
subject: Radiation Therapy
subject: Nanotechnology
subject: FOS: Nanotechnology

description: The use of gold nanoparticles (GNPs) to enhance the dose due to radiation, through increased photoelectric effect interactions, has shown promise in vivo and in vitro. Monte Carlo studies have worked towards quantifying the dose enhancement and the dosimetry surrounding GNPs. This thesis investigates the dosimetry in the presence of GNPs for several scenarios using PENELOPE Monte Carlo simulations. Accurate simulation of GNPs can be challenging due to the large number of particles present in realistic scenarios – up to 10^15 particles/cm^3. Because of this, many Monte Carlo studies have approximated GNPs in tissue as a homogeneous mixture of tissue and gold. However, such models ignore details of energy deposition on nanoscopic scales, including absorption of dose within the GNPs. In this thesis, we first quantified the dosimetric impact of this assumption, finding dose differences up to 31% for the scenarios investigated, and enabling fast, accurate simulation of macroscopic dose enhancement. The eventual clinical application of GNP-enhanced radiation therapy will rely on enhancement at macroscopic scales. We next investigated the general feasibility of using GNP-enhanced arc radiation therapy (GEART) to treat deep-seated tumours using kilovoltage photon beams. Applying the method established above, we quantified the quality of GEART treatments compared to conventional 6 MV treatments for a variety of tumour sizes and depths. We recommended those sites for which further investigation should be undertaken. In vivo and in vitro, GNPs are often coated with polyethylene glycol (PEG), a polymer that enables functionalization and biocompatibility. Monte Carlo studies, however, typically do not model these coatings, which may lead to dosimetric errors. We quantified the dose lost to PEG coatings for a variety of GNP sizes, coating thicknesses, and photon beam energies. Dose losses of up to 7.5% and 34% were seen on microscopic and nanoscopic scales, respectively. Through this work we aim to provide a basis for future studies examining clinical implementation of GNP dose enhancement, adding to the base of knowledge that can be drawn upon if GNP dose enhancement is to be brought into clinical use. Further research is needed to evaluate the radiobiological impact of the effects studied here.
Chrysis sexdentata Christ 1791
Creators: name: Paukkunen, Juho
name: Rosa, Paolo
name: Soon, Villu
name: Johansson, Niklas
name: Ødegaard, Frode
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Masaridae
Chrysis
Chrysis sexdentata

description: 64. Chrysis sexdentata Christ, 1791
Chrysis sexdentata Christ 1791: 404. Type?; locality unknown (Mus.?). Tumšs & Maršakovs 1970: 92, Soon 2004: 46, Orlovskytė et al. 2010: 153.
Chrysis sexdentata sexdentata: Rosa & Soon 2012.
Distribution. Latvia.—Westpalearctic: southern and central Europe, western and central Asia, North Africa (Linsenmaier 1959, 1999).
Remarks. One male specimen of this species was reported from central Latvia, Ropaži, by Tumšs & Maršakovs (1970). The specimen has been checked at LMSZ in Riga. The closest records are from Belarus (Shljachtenok 2006). Haupt (1957: 118) reported C. sexdentata from southern Sweden, but this record is most likely erroneous. The record of Dahlbom (1831) of C. sexdentata (nec Christ, 1791) from Westrogothia (= Västergötland) in Sweden refers to C. equestris or C. zetterstedti, which were not yet described at that time. Dahlbom’s record of C. sexdentata was also mentioned by Zetterstedt (1840).
description: Published as part of Paukkunen, Juho, Rosa, Paolo, Soon, Villu, Johansson, Niklas & Ødegaard, Frode, 2014, Faunistic review of the cuckoo wasps of Fennoscandia, Denmark and the Baltic countries (Hymenoptera: Chrysididae), pp. 1-67 in Zootaxa 3864 (1) on page 45, DOI: 10.11646/zootaxa.3864.1.1, http://zenodo.org/record/4930433
Trastorno obsesivo compulsivo, covid-19 y nueva normalidad
Creators: name: García Lázaro, Fernando
name: Márquez Ligero, Francisco José
name: Del Pilar Ridruejo López, María Isabel
name: López Lavela, Erica
Publisher: name: Psicosomàtica y Psiquiatría
Year: 2021

description: Psicosomàtica y Psiquiatría, Núm. 16 (2021)
A Survey of Ocean Simulation and Rendering Techniques in Computer Graphics
Creators: name: Darles, Emmanuelle
name: Crespin, Benoît
name: Ghazanfarpour, Djamchid
name: Gonzato, Jean-Christophe
Publisher: name: arXiv
Year: 2011
Subjects: subject: Graphics (cs.GR)
subject: FOS: Computer and information sciences

description: This paper presents a survey of ocean simulation and rendering methods in computer graphics. To model and animate the ocean's surface, these methods mainly rely on two main approaches: on the one hand, those which approximate ocean dynamics with parametric, spectral or hybrid models and use empirical laws from oceanographic research. We will see that this type of methods essentially allows the simulation of ocean scenes in the deep water domain, without breaking waves. On the other hand, physically-based methods use Navier-Stokes Equations (NSE) to represent breaking waves and more generally ocean surface near the shore. We also describe ocean rendering methods in computer graphics, with a special interest in the simulation of phenomena such as foam and spray, and light's interaction with the ocean surface.
Additional file 2 of Polygenic risk score improves the accuracy of a clinical risk score for coronary artery disease
Creators: name: King, Austin
name: Wu, Lang
name: Deng, Hong-Wen
name: Shen, Hui
name: Wu, Chong
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Mathematical Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer
subject: Virology
subject: Computational Biology

description: Additional file 2: Variable definition codes. Table S1. Definition of Codes for Variables in UK Biobank. Table S2. Definition of Codes for Coronary Artery Disease.
Depresión postpsicótica y suicidio
Creators: name: Moya Sáez, Isabel
name: Sánchez Romero, Paloma
name: Báez Rodríguez, Ana María
Publisher: name: Psicosomàtica y Psiquiatría
Year: 2021

description: Psicosomàtica y Psiquiatría, Núm. 16 (2021)
Hamiltonian analysis for topological and Yang-Mills theories expressed as a constrained BF-like theory
Creators: name: Escalante, Alberto
name: López-Osio, J. Angel
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The Hamiltonian analysis for the Euler and Second-Chern classes is performed. We show that, in spite of the fact that the Second-Chern and Euler invariants give rise to the same equations of motion, their corresponding symplectic structures on the phase space are different, therefore, one can expect different quantum formulations. In addition, the symmetries of actions written as a BF-like theory that lead to Yang-Mills equations of motion are studied. A close relationship with the results obtained in previous works for the Second-Chern and Euler classes is found.
Electron distributions in nonlinear Compton scattering
Creators: name: Boca, Madalina
name: Dinu, Victor
name: Florescu, Viorica
Publisher: name: arXiv
Year: 2012
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Based on quantum theory, we investigate the distribution of the electrons scattered in nonlinear Compton effect by an electromagnetic plane wave. Deviations of the final electron momentum from its initial value are solely due to quantum effects. The monochromatic case, examined in detail, reveals features of the electron distribution, useful in the understanding of the pulsed plane wave case for particular intensity and electron energy regimes. The graphs displayed focus on the case of head-on or near head-on collision of an energetic electron with an electromagnetic circularly polarized pulsed plane wave and show that the deviation in direction is extremely small, while the distribution in energy can be visibly different from that of the initial electron. Two pulse shapes, several laser intensities and high incident electron energies are considered.
description: accepted by Phys. Rev. A
title: Parameters of the Seismic Risk for Blagoevgrad Region, Bulgaria
Creators: name: Trifonova, Petya
name: Solakov, Dimcho
name: Simeonova, Stela
name: Metodiev, Metodi
name: Balan, Stefan Florin
Publisher: name: Proceeding of 1st International Conference on Environmental Protection and Disaster RISKs, 2020, p. 353-360
Year: 2020
Subjects: subject: FOS: Earth and related environmental sciences

description: Exposure means people, property, systems, or other elements present in hazard zones that are thereby subject to potential losses. Present research analyses the human exposure at one of the most dangerous earthquake zones in Bulgaria-Blagoevgrad region as one of the main parameters of the seismic risk. Seismic hazard is modelled using GIS and overlaid with one square kilometre grid of population distribution in order to determine the population exposure. We define a parameter called “population exposure index” (PEI) which has five classes: Minor, Low, Moderate, High and Major. As was expected, the seismic hazard levels of Blagoevgrad region are in the upper part of the classification scale. The Krupnik- Kresna area is fully covered with the highest 5th level and the remaining part falls within the interval limits of level 4. The total population in the Blagoevgrad region (NUTS II) is around 138 000 people. Results show that more than 45 000 people are exposed to the highest level of seismic hazard. More than 50 settlements (towns and villages) are classified with Major (5) PEI.
description: Proceeding of 1st International Conference on Environmental Protection and Disaster RISKs, 2020, p. 353-360
Additional file 3 of Polygenic risk score improves the accuracy of a clinical risk score for coronary artery disease
Creators: name: King, Austin
name: Wu, Lang
name: Deng, Hong-Wen
name: Shen, Hui
name: Wu, Chong
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Mathematical Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer
subject: Virology
subject: Computational Biology

description: Additional file 3: Polygenic risk score methodology and reclassification metrics.
A two-component jet model based on the Blandford-Znajek and Blandford-Payne processes
Creators: name: Xie, Wei
name: Lei, Wei-Hua
name: Zou, Yuan-Chuan
name: Wang, Ding-Xiong
name: Wu, Qingwen
name: Wang, Jiu-Zhou
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We propose a two-component jet model consistent with the observations of several gamma ray bursts (GRBs) and active galactic nuclei (AGNs). The jet consists of inner and outer components, and they are supposed to be driven by the Blandford-Znajek (BZ) and Blandford-Payne (BP) processes, respectively. The baryons in the BP jet is accelerated centrifugally via the magnetic field anchored in the accretion disk. The BZ jet is assumed to be entrained a fraction of accreting matter leaving the inner edge of the accretion disk, and the baryons are accelerated in the conversion from electromagnetic energy to the kinetic energy. By fitting the Lorentz factors of some GRBs (GRB 030329, GRB 051221A, GRB 080413B) and AGNs (Cen A, Mkn 501 and Mkn 421) with this model, we constrain the physical parameters related to the accretion and outflow of these two kind of objects. We conclude that the spine/sheath structure of the jet from these sources can be interpreted naturally by the BZ and BP processes.
description: 12 pages, 5 figures, 1 table, accepted for publication in RAA
Community-driven Publishing: Praktische Unterstützung, und wie geht es weiter?
Creators: name: Wrzesinski, Marcel
Publisher: name: Zenodo
Year: 2023
Subjects: open access
wissenschaftsgeleitetes Publizieren

description: Faires, gebührenfreies und wissenschaftsgeleitetes Open Access ist nach Ansicht der Forschungs-, Förderungs- und Bibliothekscommunity der Idealzustand wissenschaftlicher Kommunikation. Allerdings sind wissenschaftsgeleitete Zeitschriften noch in der Minderheit und stehen in der redaktionellen Praxis vor zahlreichen Herausforderungen: Publikationstechnologien und infrastrukturelle Dienste sind zum Teil unzugänglich, Rechtsunsicherheiten sind allgegenwärtig, Arbeitsabläufe sind ausgebremst, finanzielle wie personelle Ressourcen fehlen, es mangelt an Reputation im Publikationsdiskurs. Das BMBF-Projekt “Scholar-led Plus” greift diese Herausforderungen auf und erarbeitet praktische und strategische Wissensressourcen. Der Vortrag stellt die Projektergebnisse vor und gibt Antworten auf folgende Fragen: Zu welchen Themen brauchen wissenschaftsgeleitete Zeitschriften praktische Unterstützung? Wie kann diese Unterstützung praxisnah gestaltet werden? Welches sind die zentralen Herausforderungen für wissenschaftsgeleitete Zeitschriften? Wie wird sich wissenschaftsgeleitetes Publizieren in den nächsten Jahren entwickeln? Der Vortrag wurde am 29.06.2023 im Rahmen der Webinar-Reihe Open Access Talk des BMBF-geförderten Projektes open-access.network gehalten.
Optimality and Fairness in Speed Scaling Systems
Creators: name: Elahi, Bibi Maryam
Publisher: name: Graduate Studies
Year: 2017
Subjects: Computer Science

description: Dynamic speed-scaling has received significant attention in the recent literature as an effective method for balancing between better performance and the associated cost of energy. In particular, the objective of minimizing the linear combination of average response time and energy consumption in single-server systems is extensively studied. Coupled speed-scaling, in which the speed is a function of the number of jobs in the system, is shown to be robust and optimal for minimizing the linear combination of average response-time and energy consumption in a single-server system. However, there are concerns that coupled speed-scaling may create or magnify unfairness. The goal of this thesis is to further investigate the tradeoffs between optimality and fairness in speed-scaling systems. We investigate the autoscaling properties of coupled speed-scaling systems under distributional assumptions about the workload and structural assumptions about the speed scaler. We observe distinct speed-scaling dynamics for PS and SRPT, which sheds light on the tradeoffs between optimality and fairness in coupled speed-scaling systems. In particular, we observe that the cost under M/GI/1 PS with coupled speed-scaling is near-optimal at high load. Furthermore, we investigate the magnitude of unfairness under SRPT. We observe that the compromise in cost optimality is small for PS in comparison to the significant performance degradation for the largest jobs under the optimal policy SRPT. We further investigate the possibility of a robust, fair, and near-optimal policy in speed-scaling systems. We show that the FSP policy is not well-defined in the coupled speed-scaling model. To facilitate the analysis of FSP and other scheduling policies on a level ground, an alternative model called decoupled speed-scaling is proposed and evaluated. With decoupled speed-scaling, FSP dominates PS, and is provably efficient. Simulation results demonstrate a notable performance advantage for FSP, compared to PS. Based on our analysis and evaluation, we conjecture that it is possible to achieve fairness, robustness, and near-optimality with decoupled speed-scaling.
Ortho-H2 and the Age of Interstellar Dark Clouds
Creators: name: Pagani, Laurent
name: Roueff, Evelyne
name: Lesaffre, Pierre
Publisher: name: arXiv
Year: 2011
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Interstellar dark clouds are the sites of star formation. Their main component, dihydrogen, exists under two states, ortho and para. H2 is supposed to form in the ortho:para ratio (OPR) of 3:1 and to subsequently decay to almost pure para-H2 (OPR <= 0.001). Only if the H2 OPR is low enough, will deuteration enrichment, as observed in the cores of these clouds, be efficient. The second condition for strong deuteration enrichment is the local disappearance of CO, which freezes out onto grains in the core formation process. We show that this latter condition does not apply to DCO+, which, therefore, should be present all over the cloud. We find that an OPR >= 0.1 is necessary to prevent DCO+ large-scale apparition. We conclude that the inevitable decay of ortho-H2 sets an upper limit of ~6 million years to the age of starless molecular clouds under usual conditions.
The Northern Irish hunger strikers as cultural icons
Creators: name: Simuna, Erja
Publisher: name: Akademisk kvarter | Academic Quarter
Year: 2015

description: The aim of this article is to discuss hunger strikers as cultural icons. Fasting is a non-violent way of communicating a message or achieving a goal. It is a process that includes and reveals poignant cultural values, and can be regarded as a symbolic gesture. It is also a phenomenon recognised by many cultures. As the nature of this recognition can vary between different cultures, wider cross-cultural aspects of iconicity can be reached.

This article examines the 1981 Northern Irish hunger strike to find out what iconic attributes are connected with the hunger strikers. A special focus is given to the role of international news media as an intensifier of iconicity.
description: Akademisk kvarter | Academic Quarter, Icons, Vol. 10
Synthesis of Cylindricine C and its Stereoisomers
Creators: name: Prinsloo, Rohen
Publisher: name: Graduate Studies
Year: 2015
Subjects: subject: Chemistry--Organic
subject: Cylindricine alkaloids
subject: Acetylenic sulfone

description: Cylindricine alkaloids are unique in their structural makeup due to the unusual tricyclic pyrrolo[2,1-j]quinoline framework having a cis-fused azadecalin skeleton. Novel approaches to synthesising these complex molecules are useful due to the difficulty in isolating these compounds from natural sources. Acetylenic sulfones have been used by our group in the synthesis of numerous nitrogen-containing heterocycles. We have applied our acetylenic sulfone methodology to the synthesis of 2,13-di-epi-cylindricine C and cylindricine C by employing a tandem conjugate addition and intramolecular cyclisation of a key intermediate β-amino ester. Key steps in our synthesis involve a Curtius rearrangement to install the nitrogen at the quaternary center and an electrophilic cyclisation to construct the tricyclic core. Desulfonylation and reduction of the resulting enaminone double bond moiety yielded 2,13-di-epi-Cylindricine C and Cylindricine C in a diastereomeric ratio of 3:1. A route amenable to an enantioselective approach was also achieved.
Coupled high Q-factor Surface Nanoscale Axial Photonics (SNAP) microresonators
Creators: name: Sumetsky, M.
name: Abedin, K.
name: DiGiovanni, D. J.
name: Dulashko, Y.
name: Fini, J. M.
name: Monberg, E.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We experimentally demonstrate series of identical two, three, and five coupled high Q-factor Surface Nanoscale Axial Photonics (SNAP) microresonators formed by periodic nanoscale variation of the optical fiber radius. These microresonators are fabricated with a 100 \mum period along an 18 \mum radius optical fiber. The axial FWHM of these microresonators is 80 \mum and their Q-factor exceeds 107. In addition, we demonstrate a SNAP microresonator with the axial FWHM as small as 30 \mum and the axial FWHM of the fundamental mode as small as 10 \mum. These results may potentially enable the dense integration of record low loss coupled photonic microdevices on the optical fiber platform.
A propósito de un caso: depresión con delirio de negación de Cotard
Creators: name: Ludwig, Carina
name: Lago García, Laura
name: Valtueña García, Mercedes
name: Huergo Lora, Covadonga
name: Arias Martino, Ramón
name: Ocio León, Sergio
Publisher: name: Psicosomàtica y Psiquiatría
Year: 2021

description: Psicosomàtica y Psiquiatría, Núm. 16 (2021)
Conducta suicida en adolescente con trastorno del neurodesarrollo: ¿Autismo o Psicosis emergente?
Creators: name: Pérez Moreno, María Rosario
name: Ladrón Jiménez, Alfonso
Publisher: name: Psicosomàtica y Psiquiatría
Year: 2021

description: Psicosomàtica y Psiquiatría, Núm. 16 (2021)
Esketamina intranasal en depresión resistente: a propósito de un caso
Creators: name: Sanchis Marco, Irene
name: Conesa Burguet, Llanos
Publisher: name: Psicosomàtica y Psiquiatría
Year: 2021

description: Psicosomàtica y Psiquiatría, Núm. 16 (2021)
The Pop-Icon Hitler as a Trope of Critical Reflection on Media Society
Creators: name: Gebauer, Mirjam
Publisher: name: Akademisk kvarter | Academic Quarter
Year: 2015

description: Countless representations in different media and genres through several decades make Hitler one of the most productive icons on a global scale. The analysis of this icon seems of fundamental theoretical interest as its original semantics as the embodiment of evil challenges common notions of icon work between collaborative iconolatry, on the one hand, and adversarial iconoclasm, on the other. However, the range of different significances to be found in contemporary Hitler representations suggests that the icon serves to work through issues of the respective context in which it is used. I will argue that, interestingly, especially representations claiming to do justice to history and to the historical person Hitler might be problematized and seen as part of a “remembrance industry”, while pop-cultural, often humorous representations of the icon establish a critical meta-level allowing audiences to reflect on certain phenomena in contemporary media society.
description: Akademisk kvarter | Academic Quarter, Icons, Vol. 10
E-learning Experiences of Adult Learners from Nigeria: A Narrative Inquiry
Creators: name: ATAKE, RITA
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Education
subject: Education--Adult and Continuing
subject: Education--Curriculum and Instruction
subject: Education--Higher
subject: Education--Teacher Training
subject: Education--Technology
subject: E-LEARNING IN CANADA
subject: Culture
subject: NIGERIANS AND E-LEARNING
subject: narrative inquiry

description: The cultural impact on adult learners from other cultures who bring their narrative and cultural histories to the Canadian e-learning context can be great. This research study examined how adult learners from Nigeria describe, understand, and interpret their e-learning experiences in Canada. Based on social constructivism (Fosnot & Perry, 2005; Garrison, Anderson, & Archer, 2000; Lave & Wenger, 1991; Vygotsky, 1978) and using Hofstede’s (1983) cultural dimensions theory as a conceptual framework, findings from this study indicated that asynchronous e-learning environments can become sites of struggle, and present barriers to the learning experience of adult learners from Nigeria. The literature reviewed for this study examined three main areas: culture and learning styles; e-learning and adult education; and epistemological diversity. Drawing from Connelly and Clandinin’s (2000) three-dimensional narrative inquiry space, stories of past educational experiences in Nigeria and of interactions in the asynchronous e-learning context in Canada were elicited from participants using open-ended semi-structured interviews. Data analysis was performed using a two-fold approach based on Polkinghorne’s (1995) narrative analysis and an analysis of narrative. By using this augmented approach, I aimed to give voice to the experiences of adult learners from Nigeria whose voices are rarely included in the literature on culturally responsive e-learning. Key findings from this study indicated that asynchronous e-learning can present challenges to adult learners from Nigeria as a result of three factors: unfamiliarity with using technology for higher education purposes; the reliance on written text for teacher, student, content interactions, and communication; and an increased requirement for self-regulation and self-directed learning that is complicated by distance education. Recommendations were offered to adult educators for designing and facilitation e-learning programs, as well as to culturally diverse adult learners for successful engagement in e-learning.
Direct observation of the proliferation of ferroelectric loop domains and vortex-antivortex pairs
Creators: name: Chae, S. C.
name: Lee, N.
name: Horibe, Y.
name: Tanimura, M.
name: Mori, S.
name: Gao, B.
name: Carr, S.
name: Cheong, S. -W.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We discovered "stripe" patterns of trimerization-ferroelectric domains in hexagonal REMnO3 (RE=Ho, ---, Lu) crystals (grown below ferroelectric transition temperatures (Tc), reaching up to 1435 oC), in contrast with the vortex patterns in YMnO3. These stripe patterns roughen with the appearance of numerous loop domains through thermal annealing just below Tc, but the stripe domain patterns turn to vortex-antivortex domain patterns through a freezing process when crystals cross Tc even though the phase transition appears not to be Kosterlitz-Thouless-type. The experimental systematics are compared with the results of our six-state clock model simulation and also the Kibble-Zurek Mechanism for trapped topological defects.
other ways to inhabit the world | other ways of being with
Creators: name: Inkster, Alexandria
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Fine Arts
subject: Performance
subject: Installation

description: This paper re-presents the research/artworks I have conducted/lived/produced between September 2014 and Summer 2016. Its primary objective is to better situate my Thesis Performance, collate | the collective inside, within the larger framework of an iterative creative research practice. Through the practices of installation and performance art, I have sought to investigate, identify, and present alternative ways in which to perceive and inhabit our shared and overlapping lifeworlds; other ways to inhabit the world | other ways of being with re-presents the projects I have undertaken with this objective in mind over the past two years. I contextualize my position within contemporary art by briefly touching on artists whose artwork and/or practices operate with similar aims to my own. At the end of the document, I provide an appendix of personally relevant, redefined terms, which relate to concepts and themes that have impelled and shaped much of my research and cultural production to date.