cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Deformations of Symmetric Simple Modular Lie (Super)Algebras
Creators: name: Bouarroudj, Sofiane
name: Grozman, Pavel
name: Leites, Dimitry
Publisher: name: arXiv
Year: 2008
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 17B50, 70F25

description: We say that a Lie (super)algebra is ''symmetric'' if with every root (with respect to the maximal torus) it has the opposite root of the same multiplicity. Over algebraically closed fields of positive characteristics (up to 7 or 11, enough to formulate a general conjecture), we computed the cohomology corresponding to the infinitesimal deformations of all known simple finite-dimensional symmetric Lie (super)algebras of rank $<9$, except for superizations of the Lie algebras with ADE root systems, and queerified Lie algebras, considered only partly. The moduli of deformations of any Lie superalgebra constitute a supervariety. Any infinitesimal deformation given by any odd cocycleis integrable. All deformations corresponding to odd cocycles are new. Among new results are classifications of the cocycles describing deforms (results of deformations) of the 29-dimensional Brown algebra in characteristic 3, of Weisfeiler-Kac algebras and orthogonal Lie algebras without Cartan matrix in characteristic 2. Open problems: describe non-isomorphic deforms and equivalence classes of cohomology theories. Appendix: For several modular analogs of complex simple Lie algebras, and simple Lie algebras indigenous to characteristics 3 and 2, we describe the space of cohomology with trivial coefficients. We show that the natural multiplication in this space is very complicated.
Phlexor: A Residual Force Controlled, Synergy-Based Hand Exoskeleton for Grasping Assistance
Creators: name: DIYA BENGANI
name: AKUL DIXIT
name: CATHERINE QU
name: Glover, Nelson
name: Sanders, Quentin
Publisher: name: Journal of Student-Scientists' Research
Year: 2023

description: As a result of stroke, millions across the United States struggle with limited upper extremity function, specifically limited hand dexterity. Hand exoskeletons are designed to improve and restore hand motor function as well as quality of life. However, providing robust and intuitive user control remains challenging due to reliability issues or limited applicability to daily life scenarios. Phlexor’s control method addresses these obstacles by using a force sensor placed within a button on the palm which utilizes the residual isometric grip force of the ring and little finger to actuate the remaining three fingers. Phlexor uses a differential mechanism consisting of a single bevel gear and three spur gears to power separate rack-and-pinions, stimulating the natural postural synergies of the hand and supporting multiple variations of grasps with a single servo motor. A spring-driven slider placed on the dorsal side of the hand allows the user to mechanically fix the thumb in three different positions, enabling them to create opposition when needed. To improve the user’s donning and doffing experience, Phlexor is designed to attach to the dorsal side of the hand using compliant clasps. The inexpensive design prioritizes a lightweight and compact profile on the hand and arm while simultaneously achieving consistent movement. Future studies look to validate the functionality of Phlexor to both restore the user’s ability to perform acts of daily living and rehabilitate natural biomechanical functionality.
description: Journal of Student-Scientists' Research, Vol. 5 (2023)
The classification of almost affine (hyperbolic) Lie superalgebras
Creators: name: Chapovalov, Danil
name: Chapovalov, Maxim
name: Lebedev, Alexei
name: Leites, Dimitry
Publisher: name: arXiv
Year: 2009
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 17B65

description: We say that an indecomposable Cartan matrix A with entries in the ground field of characteristic 0 is almost affine if the Lie sub(super)algebra determined by it is not finite dimensional or affine but the Lie (super)algebra determined by any submatrix of A, obtained by striking out any row and any column intersecting on the main diagonal, is the sum of finite dimensional or affine Lie (super)algebras. A Lie (super)algebra with Cartan matrix is said to be almost affine if it is not finite dimensional or affine, and all of its Cartan matrices are almost affine.
 We list all almost affine Lie superalgebras over complex numbers correcting two earlier claims of classification and make available the list of almost affine Lie algebras obtained by Li Wang Lai.
description: 92 pages
Minkowski superspaces and superstrings as almost real-complex supermanifolds
Creators: name: Bouarroudj, Sofiane
name: Grozman, Pavel
name: Leites, Dimitry
name: Shchepochkina, Irina
Publisher: name: arXiv
Year: 2010
Subjects: subject: Differential Geometry (math.DG)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 58A50, 32C11, 81Q60

description: In 1996/7, J. Bernstein observed that smooth or analytic supermanifolds that mathematicians study are real or (almost) complex ones, while Minkowski superspaces are completely different objects. They are what we call almost real-complex supermanifolds, i.e., real supermanifolds with a non-integrable distribution, the collection of subspaces of the tangent space, and in every subspace a complex structure is given.
 An almost complex structure on a real supermanifold can be given by an even or odd operator; it is complex (without "always") if the suitable superization of the Nijenhuis tensor vanishes. On almost real-complex supermanifolds, we define the circumcised analog of the Nijenhuis tensor. We compute it for the Minkowski superspaces and superstrings. The space of values of the circumcised Nijenhuis tensor splits into (indecomposable, generally) components whose irreducible constituents are similar to those of Riemann or Penrose tensors. The Nijenhuis tensor vanishes identically only on superstrings of superdimension 1|1 and, besides, the superstring is endowed with a contact structure. We also prove that all real forms of complex Grassmann algebras are isomorphic although singled out by manifestly different anti-involutions.
description: Exposition of the same results as in v.1 is more lucid. Reference to related recent work by Witten is added
Development of an Artificial Muscle based on an Electroosmosis-Driven Magnetic Responsive Hydrogel
Creators: name: AAYUSH TALLURI
name: Glover, Nelson
name: Veneziano, Remi
name: Sanders, Quentin
Publisher: name: Journal of Student-Scientists' Research
Year: 2023

description: Pneumatically driven artificial muscles are lightweight and have high power density, but they require large compressors in addition to other auxiliary components, which limits their portability and overall utility. This has led to an increased amount of interest in investigating alternative sources to generate pneumatic pressure. Hydrogels are a promising option as they are lightweight, possess good mechanical properties, are easily fabricated, and can generate various mechanical responses (e.g., swelling) from different external stimuli (e.g., pH, temperature, light, electricity, magnetic fields, etc.). However, these actuators often suffer from low force generation and slow response times. In this work, a proof-of-concept novel artificial muscle was fabricated. The artificial muscle was based on a hydrogel placed in an electrolyte solution, which was then surrounded by a semipermeable membrane. The hydrogel swelled in the presence of a magnetic field, with the effect further amplified by electroosmosis. The combination of electroosmosis and embedding magnetic particles within the gel was chosen to improve the response me, while harnessing the electroosmotic turgor pressure enhanced force generation. Future work will look to further characterize the performance of the artificial muscle and understand the feasibility of the muscle for wearable applications.
description: Journal of Student-Scientists' Research, Vol. 5 (2023)
Deciphering Susceptibility Factors of MERS-CoV in Ethiopia: Insights from a Comprehensive Zoonotic Disease Survey
Creators: name: ROSHNI SHAH
name: Roess, Amira
Publisher: name: Journal of Student-Scientists' Research
Year: 2023

description: Middle East Respiratory Syndrome Coronavirus (MERS-CoV) is a zoonotic virus that has raised serious concerns as a public health threat worldwide. Ethiopia, with its substantial camel population and diverse wildlife, represents an important ecological context for studying the transmission dynamics of MERS-CoV between other animals and humans. However, the factors that trigger zoonotic disease emergence and spread remain poorly understood. Through analyzing and condensing data from a zoonotic disease survey, considering various factors such as occupation, drinking water sources, current health status, or number of animals owned, we are now able to identify which groups are most susceptible to these diseases due to different environments and styles of living. From the simple data analysis, we can reasonably infer that there are large numbers of older people, individuals with weakened immune systems, and poor health statuses. These groups are likely at greater risk of developing severe disease. Additionally, those who work around animals, eat animal meat, or use them for skins and medicine are more vulnerable to zoonotic diseases as well.
description: Journal of Student-Scientists' Research, Vol. 5 (2023)
title: Zur Kenntnis tricyclischer Heptalen-Derivate
Creators: name: Hafner, Klaus
name: Schneider, Gisela
Publisher: name: Wiley-VCH
Year: 2023

description: Es wird über Substituenteneinflüsse auf die Lichtabsorption des Cyclopentadienoheptalens (I) sowie über dessen Reaktionen mit elektrophilen und nucleophilen Agenzien berichtet. In Übereinstimmung mit MO- und LCAO-Berechnungen verhält sich I wie ein Azulen mit in 1.8-Stellung angegliederter Dienbrücke, deren π-Elektronen an der Resonanz des bicyclischen 10π-Elektronensystems teilnehmen. Ausgehend von II konnte das aus drei 7-Ringen und einem 5-Ring aufgebaute tetracyclische System XXXIII gewonnen werden.
The classical Yang-Baxter equation and the associated Yangian symmetry of gauged WZW-type theories
Creators: name: Itsios, Georgios
name: Sfetsos, Konstantinos
name: Siampos, Konstantinos
name: Torrielli, Alessandro
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We construct the Lax-pair, the classical monodromy matrix and the corresponding solution of the Yang--Baxter equation, for a two-parameter deformation of the Principal chiral model for a simple group. This deformation includes as a one-parameter subset, a class of integrable gauged WZW-type theories interpolating between the WZW model and the non-Abelian T-dual of the principal chiral model. We derive in full detail the Yangian algebra using two independent methods: by computing the algebra of the non-local charges and alternatively through an expansion of the Maillet brackets for the monodromy matrix. As a byproduct, we also provide a detailed general proof of the Serre relations for the Yangian symmetry.
description: 1+32 pages, Latex, v2: few minor changes, NPB version, v3: A factor of two corrected in (A.22)
Non-Detection of X-Ray Emission From Sterile Neutrinos in Stacked Galaxy Spectra
Creators: name: Anderson, Michael E.
name: Churazov, Eugene
name: Bregman, Joel N.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We conduct a comprehensive search for X-ray emission lines from sterile neutrino dark matter, motivated by recent claims of unidentified emission lines in the stacked X-ray spectra of galaxy clusters and the centers of the Milky Way and M31. Since the claimed emission lines lie around 3.5 keV, we focus on galaxies and galaxy groups (masking the central regions), since these objects emit very little radiation above $\sim 2$ keV and offer a clean background against which to detect emission lines. We develop a formalism for maximizing the signal-to-noise of decaying dark matter emission lines by weighing each X-ray event according to the expected dark matter profile. In total, we examine 81 and 89 galaxies with Chandra and XMM-Newton respectively, totaling 15.0 and 14.6 Ms of integration time. We find no significant evidence of any emission lines, placing strong constraints on the mixing angle of sterile neutrinos with masses between 4.8-12.4 keV. In particular, if the 3.57 keV feature from Bulbul et al. (2014) were due to 7.1 keV sterile neutrino emission, we would have detected it at $4.4σ$ and $11.8σ$ in our two samples. The most conservative estimates of the systematic uncertainties reduce these constraints to $4.4σ$ and 7.8$σ$, or letting the line energy vary between 3.50 and 3.60 keV reduces these constraints to $2.7σ$ and $11.0σ$ respectively. Unlike previous constraints, our measurements do not depend on the model of the X-ray background or on the assumed logarithmic slope of the center of the dark matter profile.
description: accepted to MNRAS
Phase Separation, Competition, and Volume Fraction Control in NaFe$_{1-x}$Co$_x$As
Creators: name: Ma, Long
name: Dai, J.
name: Wang, P. S.
name: Lu, X. R.
name: Song, Yu
name: Zhang, Chenglin
name: Tan, G. T.
name: Dai, Pengcheng
name: Hu, D.
name: Li, S. L.
name: Normand, B.
name: Yu, Weiqiang
Publisher: name: arXiv
Year: 2014
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report a detailed nuclear magnetic resonance (NMR) study by combined $^{23}$Na and $^{75}$As measurements over a broad range of doping to map the phase diagram of NaFe$_{1-x}$Co$_x$As. In the underdoped regime ($x \le$ 0.017), we find a magnetic phase with robust antiferromagnetic (AFM) order, which we denote the {\it s}-AFM phase, cohabiting with a phase of weak and possibly proximity-induced AFM order ({\it w}-AFM) whose volume fraction $V \simeq 8$\% is approximately constant. Near optimal doping, at $x = 0.0175$, we observe a phase separation between static antiferromagnetism related to the {\it s}-AFM phase and a paramagnetic (PM) phase related to {\it w}-AFM. The volume fraction of AFM phase increases upon cooling, but both the N{é}el temperature and the volume fraction can be suppressed systematically by applying a $c$-axis magnetic field. On cooling below $T_c$, superconductivity occupies the PM region and its volume fraction grows at the expense of the AFM phase, demonstrating a phase separation of the two types of order based on volume exclusion. At higher dopings, static antiferromagnetism and even critical AFM fluctuations are completely suppressed by superconductivity. Thus the phase diagram we establish contains two distinct types of phase separation and reflects a strong competition between AFM and superconducting phases both in real space and in momentum space. We suggest that both this strict mutual exclusion and the robustness of superconductivity against magnetism are consequences of the extreme two-dimensionality of NaFeAs.
description: 12 pages, 6 figures
Antibiotic resistance in Campylobacter jejuni and coli genes among poultry and humans
Creators: name: BABIHA BAKSHI
name: Roess, Amira
Publisher: name: Journal of Student-Scientists' Research
Year: 2023

description: The Campylobacter bacteria, as identified by epidemiologists and public health officials, is the culprit of various gastrointestinal infections resulting from consuming raw poultry and meat. In most cases, Campylobacter is self-limiting after 3-5 days, but severe cases require antibiotic treatment. However, two species of this bacteria’s, C. jejuni and C. coli,isolates of clinical and animal origin showed high anti-microbial resistance to various drugs. In this study, genomes of 109 isolates of AMR Campylobacter from a source in Bangladesh were sequenced to determine which drugs the bacteria are most resistant to. Chicken, pigeon, and human stool samples were tested for multiresistance, in addition to singular AMR genes. Antibiotics tested included macrolides, aminoglycosides, quinolones, beta-lactams, tetracyclines, streptothricin, and arsenic. For singular drugs, both C. jejuni and C. coli were most resistant to quinolones, with 94% of C. jejuni samples and 100% of C. coli samples demonstrating resistance to this specific antibiotic. Both species were least resistant to aminoglycosides and streptothricin, with none of the C. coli samples, and a singular C. jejuni sample indicating resistance. When measuring multiresistance, 92% of C. jejuni samples were multiresistant to a total of 12 antibiotic combinations and 100% of C. coli samples were multiresistant to a total of 8 antibiotic combinations. 11 out of the 12 C. jejuni resistant combinations and all 8 of the C. coli resistant combinations contained quinolones, while only 1 out of the 12 C. jejuni combinations contained aminoglycosides and streptothricin. In the following, the antibiotics are ordered from most effective to least effective: aminoglycosides, streptothricin, arsenic, macrolides, beta-lactams, tetracyclines, and finally quinolones. From this data, health care professionals can be informed that aminoglycosides and streptothricin are the most effective antibiotic treatment for severe Campylobacter cases, while quinolones are the least effective and should be avoided.
description: Journal of Student-Scientists' Research, Vol. 5 (2023)
New developments of parametric and semiparametric volatility models with application to quantitative risk management
Creators: name: Letmathe, Sebastian
Publisher: name: Universität Paderborn
Year: 2023

description: The underlying methodology of this thesis is based on the decomposition of a time series into a deterministic and stochastic component, where the latter is assumed to follow well-known time series models from the ARMA- as well as GARCH-class and the formeris a non-negative slowly varying function, which can be estimated via a nonparametric smoothing method. A time series composed as described before is at best locally stationary. Hence, fitting a parametric model directly to such a series is in fact a misspecication. As a remedy, the deterministic trend or scale function has to be estimated and removed beforehand from the data, in order to fit a parametric model to the approximately stationary residuals. In this thesis local polynomial and penalised spline regression are employed for the estimation of the deterministic component. Various iterative plug-in algorithms are proposed for smoothing parameter selection and are implemented in R-packages, namely smoots, esemifar and ufRisk. All these packages are publicly available on CRAN. The wide applicability of these packages is illustrated with real data examples and the performance of the algorithms is validated within the scope of thorough simulation studies. One of the major contributions of this thesis is the development and application of a new parametric time series model with long memory, namely the FI-Log-GARCH and various semiparametric extensions of this model as well as of other well-known time series models with short- and long memory. The FI-Log-GARCH is a fractional extension of the Log-GARCH. Theoretical properties such as necessary and sucient conditions for stationary solutions, existence of nite fourth moments, explicit expression for the autocorrelation and central limit theorem for the sample mean are derived.
Disparities in Adolescent HPV and Tdap Immunization Uptake Across Virginia in 2021
Creators: name: Allisyn Lam
name: McNally, Kimberly
name: Roess, Amira
Publisher: name: Journal of Student-Scientists' Research
Year: 2023

description: Vaccination against Human Papillomavirus infection (HPV) prevents cancer-causing infections and precancers for those who receive the recommended inoculations. In use since 2006, it is both a safe and effective cancer prevention, however, there are still a substantial number of people who do not receive the vaccine. In Virginia, the school mandate for HPV vaccinations became effective for females in 2008 and gender-neutral in 2021. Yet today, there are statewide disparities in the rates of adolescent inoculations. This study is a retrospective cross-sectional analysis of 7th grade vaccine data at the school level for the 2021 school year. Data from the Virginia Department of Health’s Annual School Self-Reports of Immunization Coverage: Student Immunization Status Report was utilized for 339 individual schools. Summary statistics were calculated to provide a comparison between school level data and published national and state level studies. Overall, in 2021 the HPV vaccination rate in male students was 56.1% while it was 60.2% for female students. For Tdap, the statewide vaccination rate was 91.5%. Comparing schools to the Healthy People 2030’s 80% vaccination goal amongst adolescents, 11.21% of schools’ male HPV inoculation rates met this goal, 15.34% of schools’ female HPV inoculation rates met this goal, and 88.79% of schools’ Tdap inoculation rates met this goal. HPV vaccinations are more frequently opted-out of for students of non-Title I designated schools amongst males and females as HPV vaccinations remain significantly lower than Tdap vaccinations.
description: Journal of Student-Scientists' Research, Vol. 5 (2023)
Prediction of semi-metallic tetragonal Hf2O3 and Zr2O3 from first-principles
Creators: name: Xue, Kan-Hao
name: Blaise, Philippe
name: Fonseca, Leonardo R. C.
name: Nishi, Yoshio
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: A tetragonal phase is predicted for Hf2O3 and Zr2O3 using density functional theory. Starting from atomic and unit cell relaxations of substoichiometric monoclinic HfO2 and ZrO2, such tetragonal structures are only reached at zero temperature by introducing the oxygen vacancy pair with the lowest formation energy. The tetragonal Hf2O3 and Zr2O3 structures belong to space group P-4m2 and are more stable than their corundum structure counterparts. These phases are semi-metallic, as confirmed through further G0W0 calculations. The carrier concentrations are estimated to be 1.77E21 cm^{-3} for both electrons and holes in tetragonal Hf2O3, and 1.75E21 cm^{-3} for both electrons and holes in tetragonal Zr2O3. The tetragonal Hf2O3 phase is probably related to the low resistivity state of hafnia-based resistive random access memory (RRAM).
Emergent gravitational dynamics in relativistic Bose--Einstein condensate
Creators: name: Belenchia, Alessio
name: Liberati, Stefano
name: Mohd, Arif
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Analogue models of gravity have played a pivotal role in the past years by providing a test bench for many open issues in quantum field theory in curved spacetime such as the robustness of Hawking radiation and cosmological particle production. More recently, the same models have offered a valuable framework within which current ideas about the emergence of spacetime and its dynamics could be discussed via convenient toy models. In this context, we study here an analogue gravity system based on a relativistic Bose--Einstein condensate. We show that in a suitable limit this system provides not only an example of an emergent spacetime (with a massive and a massless relativistic fields propagating on it) but also that such spacetime is governed by an equation with geometric meaning that takes the familiar form of Nordstr{ö}m theory of gravitation. In this equation the gravitational field is sourced by the expectation value of the trace of the effective stress energy tensor of the quasiparticles while the Newton and cosmological constants are functions of the fundamental scales of the microscopic system. This is the first example of analogue gravity in which a Lorentz invariant, geometric theory of semiclassical gravity emerges from an underlying quantum theory of matter in flat spacetime.
description: 23 pages, no figures, new references added and minor modifications on the anonymous referee's feedback, this version accepted for publication in Phys. Rev. D
title: Visuelle Darstellung Geflüchteter in der Öffentlichkeitsarbeit von NGOs
Creators: name: Rüster, Harald Constantin Philipp
Year: 2021

description: Diese Masterarbeit befasst sich mit der visuellen Darstellung Geflüchteter in der Öffentlichkeitsarbeit von NGOs. Dazu wurden über den Zeitraum von zwei Jahren 650 Bilder von vier Organisationen- UNHCR, Caritas, Diakonie und Asylkoordination Österreich- gesammelt und mit der Methode der Bildtypenanaly-se ausgewertet. Die induktiv entwickelten Bildtypen wurden beschrieben und anschließend erfolgte die Untersuchung der vier größten Bildtypen mit der Theorie des Repräsentationsregimes von Stuart Hall. Dabei ist als Ergebnis festzuhalten, dass in der Darstellung von NGOs eine visuelle Auseinandersetzung mit dem hegemonialen Darstellungsregime ausbleibt, was der Theorie Halls nach notwendig wäre, um diese Hegemonie zu überwinden.
description: This Master thesis deals with the visual representation of Refugees in public relations of NGOs. 650 pic-tures over a two year period of four Organizations- UNHCR, Caritas, Diakonie and Asylkoordination Aus-tria- have been collected for this purpose and put in order according to the method of image type analy-sis. The inductively developed image types were characterized and the four biggest image types have been subsequently investigated with Stuart Hall’s theory of representation regime. The result of the the-sis is that a visual examination is missing with the hegemonic representation regime, which would be necessary to overcome this hegemony according to Hall’s theory.
A Study on Startup Intentions Among Final Year Arts & Science Students in Coimbatore City
Creators: name: Dr.Rajamani G, Legaa N J, Renith Susai J
Publisher: name: Zenodo
Year: 2025

description: The study explores the Start-up intentions among final year arts & science students in Coimbatore city. The focuses on students’ preference in selection of industry or sector and how do they utilize the technology and social media for their improvement of ideas and understanding. Primary data was collected in the form of questionnaires. The tool used for the study was SPSS: Frequency analysis, ANOVA and T-test. The sample size of the study is about 120 respondents. The findings reveal that students are highly preferable towards sectors with significant growth potential, such as fintech and e-commerce. The analysis further indicates that educational qualifications influence the use of technology and social media for business ideas. The study concludes that with better guidance, mentor-ship, and institutional support, these students can turn their entrepreneurial aspirations into successful ventures, contributing to a dynamic startup ecosystem.
Lie algebra deformations in characteristic 2
Creators: name: Bouarroudj, Sofiane
name: Lebedev, Alexei
name: Leites, Dimitry
name: Shchepochkina, Irina
Publisher: name: arXiv
Year: 2013
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 17B50, 70F25

description: Of four types of Kaplansky algebras, type-2 and type-4 algebras have previously unobserved $\mathbb{Z}/2$-gradings: nonlinear in roots. A method assigning a simple Lie superalgebra to every $\mathbb{Z}/2$-graded simple Lie algebra in characteristic 2 is illustrated by seven new series. Type-2 algebras and one of the two type-4 algebras are demystified as nontrivial deforms (the results of deformations) of the alternate Hamiltonian algebras. The type-1 Kaplansky algebra is recognized as the derived of the nonalternate version of the Hamiltonian Lie algebra, the one that preserves a tensorial 2-form, not an exterior one.
 Deforms corresponding to nontrivial cohomology classes can be isomorphic to the initial algebra, e.g., we confirm Grishkov's implicit claim and explicitly describe the Jurman algebra as such a "semitrivial" deform of the derived of the alternate Hamiltonian Lie algebra. This paper helps to sharpen the formulation of a conjecture describing all simple finite-dimensional Lie algebras over any algebraically closed field of nonzero characteristic and supports a conjecture of Dzhumadildaev and Kostrikin stating that all simple finite-dimensional modular Lie algebras are either of "standard" type or deforms thereof.
 In characteristic 2, we give sufficient conditions for the known deformations to be semitrivial.
description: The text is edited, references updated. Main results are more clearly formulated
Monitoring Drought in the Horn of Africa (HOA) with the NASA MODIS ET and NDVI Products
Creators: name: RACHEL KU
name: Xianjun Hao
name: Qu, John J.
name: Liu, Qian
Publisher: name: Journal of Student-Scientists' Research
Year: 2023

description: The Horn of Africa (HOA) is currently grappling with an urgent drought situation, resulting in severe water and food insecurity and natural resource crises. To address this challenge, this research focuses on tracking drought conditions in the HOA region using Evapotranspiration (ET) and Normalized Difference Vegetation Index (NDVI). A significant knowledge gap exists in the understanding of drought patterns as climate change is constantly changing the pattern. This study seeks to fill this gap by utilizing satellite remote sensing data from the Moderate Resolution Imaging Spectroradiometer (MODIS) and Famine Early Warning Systems Network (FEWSNET) modeling data. The research incorporates the analysis of ET indices from 2000 to 2023, analyzing the temporal trend of vegetation health and assessing the severity of extreme drought events. Additionally, the study explores the relationship between ET, NDVI, and drought during the wet season, focusing on March to June, and the dry season, focusing on December to March in the HOA. The results reveal the substantial impact of drought on vegetation health and agricultural productivity, with ET and NDVI declining significantly after major droughts, indicating the urgency for improved drought resilience and adaptation strategies in the region. Through this study, important revelations are made concerning the monitoring and comprehension of drought dynamics in the Horn of Africa (HOA), offering essential implications for the Africa Water-Energy-Food-Health (AWEFH) Nexus and the management of natural resources.
description: Journal of Student-Scientists' Research, Vol. 5 (2023)
title: SchülerInnenvorstellungen zum Thema Migration in Österreich in der Sekundarstufe II
Creators: name: Muttenthaler, Tanja
Year: 2021

description: Die vorliegende Forschungsarbeit soll Aufschluss darüber geben, wie österreichische Geographie- und Wirtschaftskunde-Schulbücher Migrationsthemen darstellen und aufbereiten. Zudem gilt es, die vorhandenen lebensweltlichen Vorstellungen der SchülerInnen zum Thema Migration in Österreich zu erheben, zu analysieren und mit den Darstellungen in den Lehrwerken zu vergleichen. Im Zuge der Arbeit soll überprüft werden, ob die Vorstellungen der befragten SchülerInnen den Darstellungen in den Schulbüchern entsprechen.
description: This thesis deals with the descriptions of migration topics in Austrian geography textbooks. The aim is to collect the pupils' existing ideas about migration in Austria and to compare them with the representations in the textbooks. The hypothesis to be tested is that the ideas of the interviewed pupils about migration corresponds to the representations in the textbooks.
title: Darstellung und Eigenschaften von Derivaten des Pentalens und Heptalens
Creators: name: Hafner, Klaus
name: Schneider, Joachim
Publisher: name: Wiley-VCH
Year: 2023

description: Ausgehend von Immoniumsalzen des 4.6.8-Trimethyl-azulen-1-aldehyds und seines Vinylogen, des 4.6.8-Trimethyl-azulen-1-propenals, wurden durch intramolekulare Kondensation die beiden tricyclischen Kohlenwasserstoffe V und VI dargestellt, die sowohl als Derivate des Pentalens und Heptalens als auch des Azulens aufgefaßt werden können. Die physikalischen und chemischen Eigenschaften der neuen Ringsysteme werden beschrieben.
Assessing Water Volume Fluctuations in Africa's Lake Victoria Using NASA Satellite Measurements
Creators: name: ASHLEY CHON
name: Qu, John
Publisher: name: Journal of Student-Scientists' Research
Year: 2023

description: Lake Victoria is the second largest fresh-water lake by surface area and Africa’s largest lake. For this reason, 30 million people in Tanzania, Kenya, and Uganda rely on Lake Victoria for water supply. Due to this heavy reliance, it is critical to monitor Lake Victoria. Due to climate change, recent major changes in African weather have caused Lake Victoria’s water levels to vary greatly. Initially, rising temperatures have caused water levels to decrease, but unprecedented high amounts of rainfall have caused Lake Victoria to flood in the past several years. Warning residents of these fluctuations ahead of time is crucial for many people’s safety and health. Monitoring such a large lake solely through on-site data collection is inefficient and insufficient to predict these fluctuations. To combat this issue, scientists often use satellite imaging, particularly precipitation. However, it is difficult to predict water volume fluctuations far enough ahead of time to warn residents only with precipitation data. This study aims to compare the effectiveness of predicting water volume fluctuations between precipitations (the traditional method) and Normalized Difference Water Index (NDWI) for Lake Victoria using [insert satellite name] data collected since 2000 to present. This study proves that NDWI has the ability to predict fluctuations in water level further ahead in time in comparison to precipitation. Such findings can be implemented into new technologies to better forecast water volume fluctuations in Lake Victoria to warn residents ahead of time. These results can also potentially be applied to other bodies of water as well.
description: Journal of Student-Scientists' Research, Vol. 5 (2023)
Population properties of black holes and neutron stars: the emerging picture from gravitational-wave astronomy
Creators: name: GALAUDAGE, SHANIKA ACHINI
Publisher: name: Monash University
Year: 2023
Subjects: General relativity and gravitational waves

description: Gravitational-wave astronomy provides a new perspective of the Universe, allowing us to 'listen' to some of the most violent events: collisions between black holes and neutron stars. We can extract the properties of these compact objects, such as their masses and spins, from the gravitational-wave signal. With over 90 of these events, we can ask questions about the overall properties of the population and investigate the lives of these binaries. In this thesis, I study the population properties of merging black holes and neutron stars to probe the formation and evolution of these systems.
A priori error estimates for Lagrange interpolation on triangles
Creators: name: Kobayashi, Kenta
name: Tsuchiya, Takuya
Publisher: name: arXiv
Year: 2014
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65D05, 65N30

description: We present the error analysis of Lagrange interpolation on triangles. A new \textit{a priori} error estimate is derived in which the bound is expressed in terms of the diameter and circumradius of a triangle. No geometric conditions on triangles are imposed in order to get this type of error estimates.
description: 15 pages, 2 figures To appear in Applications of Mathematics
Monitoring Vegetation Health in Africa Using Remote Sensing Measurements: Implications for the African-Water-Energy-Food-Health Nexus
Creators: name: AKSHAY WALIA
name: Xianjun Hao
name: Qu, John
Publisher: name: Journal of Student-Scientists' Research
Year: 2023

description: The African continent is facing pressing challenges resulting from the effects of climate change. Rising temperatures, shifting precipitation patterns, and the occurrence of extreme weather events, such as prolonged droughts, have substantially impacted the fragile balance of the African-Water-Energy-Food-Health (AWEFH) Nexus. Monitoring changes in vegetation health over time can provide crucial insights into the ecological responses to these climatic variations, offering valuable information for developing sustainable strategies to address the interlinked challenges of water availability, energy security, food production, and human health. In this study, we leveraged the National Oceanic and Atmospheric Administration's (NOAA) Advanced Very High-Resolution Radiometer (AVHRR) vegetation health product, spanning from 1981 to the present with a spatial resolution of 4km and a temporal resolution of 7 days. By utilizing the Normalized Difference Vegetation Index (NDVI) and Vegetation Health Index (VHI), we assessed the spatiotemporal dynamics of vegetation health across Africa. Monitoring Africa's vegetation health with NDVI and VHI can inform sustainable strategies to tackle interconnected challenges of water, energy, food, and health amidst climate change.
description: Journal of Student-Scientists' Research, Vol. 5 (2023)
Additional file 11 of Complete representation of a tapeworm genome reveals chromosomes capped by centromeres, necessitating a dual role in segregation and protection
Creators: name: Olson, Peter D.
name: Tracey, Alan
name: Baillie, Andrew
name: James, Katherine
name: Doyle, Stephen R.
name: Buddenborg, Sarah K.
name: Rodgers, Faye H.
name: Holroyd, Nancy
name: Berriman, Matt
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 11: Figure S9. Multiple alignment of the terminal centromeric repeats of each chromosome. 26 consecutive repeat copies were taken from a single location at the end of each of the six chromosomes in turn and aligned in order (top 26 = Chr1, next 26 = Chr2 etc.). Strong conservation of the 179mer centromeric repeat is seen across all chromosomes except Chr2 which shows a second novel repeat type. However, searching within the whole of the Chr2 repeat array shows that the ‘canonical’ 179mer observed in the other aligned reads is found with 100% coverage and identity. The terminal array on Chr2 is also much larger than those of the other chromosomes and is interspersed with various other repeats not shown here. Full assembly of the Chr2 terminal array is not resolvable without longer sequencing reads. Notably, when the centrosomal repeat arrays are oriented at the same end of each chromosome their sequences are found to be in alignment.
The proper geometric dimension of the mapping class group
Creators: name: Aramayona, Javier
name: Martínez-Pérez, Conchita
Publisher: name: arXiv
Year: 2013
Subjects: subject: Geometric Topology (math.GT)
subject: Group Theory (math.GR)
subject: FOS: Mathematics

description: We show that the mapping class group of a closed surface admits a cocompact classifying space for proper actions of dimension equal to its virtual cohomological dimension.
description: In the published version of this article, one of the two arguments we gave for Corollary 1.3 made an incorrect use of Harer's spine, which is in fact only valid for $n = 1$. In this version, which supersedes the published version, we have included only the other argument, embedded in the paragraph before Corollary 1.3
Vaporization of Kitaev spin liquids
Creators: name: Nasu, Joji
name: Udagawa, Masafumi
name: Motome, Yukitoshi
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Quantum spin liquid is an exotic quantum state of matter in magnets. This state is a spin analogue of the liquid helium which does not solidify down to the lowest temperature due to strong quantum fluctuations. In conventional fluids, liquid and gas possess the same symmetry and adiabatically connect to each other by bypassing the critical end point. We find that the situation is qualitatively different in quantum spin liquids realizing in a three-dimensional Kitaev model; both gapless and gapped quantum spin liquid phases at low temperatures are always distinguished from the high-temperature paramagnet (spin gas) by a phase transition. The results challenge common belief that the absence of thermodynamic singularity down to the lowest temperature is a symptom of a quantum spin liquid.
description: 11 pages, 9 figures, accepted for publication in Phys. Rev. Lett
Derivations and Central Extensions of Symmetric Modular Lie Algebras and Superalgebras
Creators: name: Bouarroudj, Sofiane
name: Grozman, Pavel
name: Lebedev, Alexei
name: Leites, Dimitry
Publisher: name: arXiv
Year: 2013
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 17B50, 70F25

description: Over algebraically closed fields of positive characteristic, for simple Lie (super)algebras, and certain Lie (super)algebras close to simple ones, with symmetric root systems (such that for each root, there is minus it of the same multiplicity) and of ranks less than or equal to 8 - most needed in an approach to the classification of simple vectorial Lie superalgebras (i.e., Lie superalgebras realized by means of vector fields on a supermanifold), - we list the outer derivations and nontrivial central extensions. When the conjectural answer is clear for the infinite series, it is given for any rank. We also list the outer derivations and nontrivial central extensions of one series of non-symmetric (except when considered in characteristic 2), namely periplectic, Lie superalgebras - the one that preserves the nondegenerate symmetric odd bilinear form, and of the Lie algebras obtained from them by desuperization. We also list the outer derivations and nontrivial central extensions of an analog of the rank 2 exceptional Lie algebra discovered by Shen Guangyu. Several results indigenous to positive characteristic are of particular interest being unlike known theorems for characteristic 0, some results are, moreover, counterintuitive.
description: with an Appendix by Andrey Krutov
Ward Identities for Hall Transport
Creators: name: Hoyos, Carlos
name: Kim, Bom Soo
name: Oz, Yaron
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We derive quantum field theory Ward identities based on linear area preserving and conformal transformations in 2+1 dimensions. The identities relate Hall viscosities, Hall conductivities and the angular momentum. They apply both for relativistic and non relativistic systems, at zero and at finite temperature. We consider systems with or without translation invariance, and introduce an external magnetic field and viscous drag terms. A special case of the identities yields the well known relation between the Hall conductivity and half the angular momentum density.
description: 35 pages, 1 figure, minor changes. Published version
Refined Chern-Simons Theory in Genus Two
Creators: name: Arthamonov, Semeon
name: Shakirov, Shamil
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Geometric Topology (math.GT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Reshetikhin-Turaev (a.k.a. Chern-Simons) TQFT is a functor that associates vector spaces to two-dimensional genus g surfaces and linear operators to automorphisms of surfaces. The purpose of this paper is to demonstrate that there exists a Macdonald q,t-deformation -- refinement -- of these operators that preserves the defining relations of the mapping class groups beyond genus 1. For this we explicitly construct the refined TQFT representation of the genus 2 mapping class group in the case of rank one TQFT. This is a direct generalization of the original genus 1 construction of arXiv:1105.5117, opening a question if it extends to any genus. Our construction is built upon a q,t-deformation of the square of q-6j symbol of U_q(sl_2), which we define using the Macdonald version of Fourier duality. This allows to compute the refined Jones polynomial for arbitrary knots in genus 2. In contrast with genus 1, the refined Jones polynomial in genus 2 does not appear to agree with the Poincare polynomial of the triply graded HOMFLY knot homology.
description: 27 pages, 13 figures
Low-Mach-number--slenderness limit for elastic Cosserat rods
Creators: name: Baus, Franziska
name: Klar, Axel
name: Marheineke, Nicole
name: Wegener, Raimund
Publisher: name: arXiv
Year: 2015
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 74K10, 35Q74, 35B40, 35C20, 65Mxx

description: This paper deals with the relation of the dynamic elastic Cosserat rod model and the Kirchhoff beam equations. We show that the Kirchhoff beam without angular inertia is the asymptotic limit of the Cosserat rod, as the slenderness parameter (ratio between rod diameter and length) and the Mach number (ratio between rod velocity and typical speed of sound) approach zero, i.e. low-Mach-number--slenderness limit. The asymptotic framework is exact up to fourth order in the small parameter and reveals a mathematical structure that allows a uniform handling of the transition regime between the models. To investigate this regime numerically, we apply a scheme that is based on a spatial Gauss-Legendre collocation and an $α$-method in time.
Measuring and Calculating Velocity of Material Along Solar Coronal Magnetic Loops
Creators: name: ARUSHI SURVE
name: SOWMYA VENKATESH
name: SAMANTHA BLOOMQUIST
name: Poland, Arthur
Publisher: name: Journal of Student-Scientists' Research
Year: 2023

description: A perplexing nature of the sun is that although the core of the sun, where nuclear fusion occurs, is the hottest region – at 15 million K - and the surface, the photosphere, of the sun is much cooler - at 5000 K - the outer magnetic loops jump in temperature to 2 million K. Magnetic loops are the result of strong magnetic fields protruding through the sun’s atmosphere as arcs. Scientists are investigating the cause of the sudden increase in temperature from the surface to the solar coronal magnetic loops. They have developed computer models to simulate the heat conditions. Using data from the EIS EUV-imaging spectrometer on the Hinode spacecraft, the velocities of particles have been measured along three different magnetic loops. Velocity is a critical component of theoretical predictions and computer models. Several studies have already taken place, however, they were left inconclusive as they contradict computer models. Increasing observations and data collection lead to a better understanding of the velocity profile in the coronal loops. To make these measurements, new computer programs in Python are used. Tools from EIS and built-in Python libraries are used to first select points on the three chosen magnetic loops. These velocities are measured at several different spectral lines. Subsequently, programs measuring the velocities based on the observed wavelength vs the lab wavelength are used. The graphs of three different magnetic loops measured at different wavelengths will be presented.
description: Journal of Student-Scientists' Research, Vol. 5 (2023)
Modeling of macroscopic stresses in a dilute suspension of small weakly inertial particles
Creators: name: Vibe, Alexander
name: Marheineke, Nicole
Publisher: name: arXiv
Year: 2015
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 76Axx, 76Dxx, 76Mxx, 76Txx

description: In this paper we derive asymptotically the macroscopic bulk stress of a suspension of small inertial particles in an incompressible Newtonian fluid. We apply the general asymptotic framework to the special case of ellipsoidal particles and show the resulting modification due to inertia on the well-known particle-stresses based on the theory by Batchelor and Jeffery.
description: 27 pages, 1 figure, submitted to: Kinetic and Related Models (KRM)