cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Creation of unstable particles and decoherence in semiclassical cosmology
Creators: name: Castagnino, Mario
name: Landau, Susana
name: Lombardo, Fernando C.
Publisher: name: arXiv
Year: 1998
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider a simple cosmological model in order to show the importance of unstable particle creation for the validity of the semiclassical approximation. Using the mathematical structure of rigged Hilbert spaces we show that particle creation is the seed of decoherence which enables the quantum to classical transition.
description: latex file; 18 pages. Some changes have been added. To appear in Gen. Rel. and Grav
CERKL regulates autophagy via the NAD-dependent deacetylase SIRT1
Creators: name: Hu, Xuebin
name: Lu, Zhaojing
name: Yu, Shanshan
name: Reilly, James
name: Liu, Fei
name: Jia, Danna
name: Qin, Yayun
name: Han, Shanshan
name: Liu, Xiliang
name: Qu, Zhen
name: Lv, Yuexia
name: Li, Jingzhen
name: Huang, Yuwen
name: Jiang, Tao
name: Jia, Haibo
name: Wang, Qing
name: Liu, Jingyu
name: Shu, Xinhua
name: Tang, Zhaohui
name: Liu, Mugen
Publisher: name: Taylor & Francis
Year: 2018
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Physiology
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Plasma Physics
subject: Hematology

description: Macroautophagy/autophagy is an important intracellular mechanism for the maintenance of cellular homeostasis. Here we show that the CERKL (ceramide kinase like) gene, a retinal degeneration (RD) pathogenic gene, plays a critical role in regulating autophagy by stabilizing SIRT1. In vitro and in vivo, suppressing CERKL results in impaired autophagy. SIRT1 is one of the main regulators of acetylation/deacetylation in autophagy. In CERKL-depleted retinas and cells, SIRT1 is downregulated. ATG5 and ATG7, 2 essential components of autophagy, show a higher degree of acetylation in CERKL-depleted cells. Overexpression of SIRT1 rescues autophagy in CERKL-depleted cells, whereas CERKL loses its function of regulating autophagy in SIRT1-depleted cells, and overexpression of CERKL upregulates SIRT1. Finally, we show that CERKL directly interacts with SIRT1, and may regulate its phosphorylation at Ser27 to stabilize SIRT1. These results show that CERKL is an important regulator of autophagy and it plays this role by stabilizing the deacetylase SIRT1.
An automated search for transiting exocomets
Creators: name: Kennedy, Grant M.
name: Hope, Greg
name: Hodgkin, Simon T.
name: Wyatt, Mark C.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: This paper discusses an algorithm for detecting single transits in photometric time-series data. Specifically, we aim to identify asymmetric transits with ingress that is more rapid than egress, as expected for cometary bodies with a significant tail. The algorithm is automated, so can be applied to large samples and only a relatively small number of events need to be manually vetted. We applied this algorithm to all long cadence light curves from the Kepler mission, finding 16 candidate transits with significant asymmetry, 11 of which were found to be artefacts or symmetric transits after manual inspection. Of the 5 remaining events, four are the 0.1% depth events previously identified for KIC 3542116 and 11084727. We identify HD 182952 (KIC 8027456) as a third system showing a potential comet transit. All three stars showing these events have H-R diagram locations consistent with $\sim$100Myr-old open cluster stars, as might be expected given that cometary source regions deplete with age, and giving credence to the comet hypothesis. If these events are part of the same population of events as seen for KIC 8462852, the small increase in detections at 0.1% depth compared to 10% depth suggests that future work should consider whether the distribution is naturally flat, or if comets with symmetric transits in this depth range remain undiscovered. Future searches relying on asymmetry should be more successful if they focus on larger samples and young stars, rather than digging further into the noise.
description: MNRAS in press
title: Fledermäuse und COVID-19
Creators: name: Joger, Ulrich
Publisher: name: Cuvillier
Year: 2022
Subjects: subject: Jahrbuch der BWG
subject: Brunsvicensien der Universitätsbibliothek Braunschweig
subject: 591
subject: 571

description: Jahrbuch der Braunschweigischen Wissenschaftlichen Gesellschaft, vol. 2021Jahrbuch 2021 der Braunschweigischen Wissenschaftlichen Gesellschaft, vol. 2021, p. 178
EXPLORATION OF IMPLEMENTATION OUTCOMES, BARRIERS, FACILITATORS AND FUNCTION ON A FRAMEWORK DEVELOPED SHOULDER INJURY REDUCTION PROGRAM FOR DIVISION I COLLEGE WRESTLERS: A MIXED-METHODS STUDY
Creators: name: Johnson, Matthew Maurice
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2024

description: The purpose of the study was to examine the effects of stakeholder feedback on implementation outcomes. Barriers/facilitators to program implementation along with the effects of a shoulder injury reduction program on shoulder function in DI wrestlers were studied. A 10-exercise program was created based on stakeholder feedback. The program was implemented for an 8-week period. The RE-AIM scoresheet assessed implementation outcomes. Shoulder function was measured, with goniometry, upper extremity Y-balance (UEYBT), and the western Ontario shoulder instability index (WOSI), before and after the implementation period. A post intervention survey was used to determine barriers/facilitators.  	Overall RE-AIM score was 7.55/10, all shoulder function measures trended towards improvement, and time along with belief in effectiveness were the biggest barriers/facilitators. In conclusion, the use of stakeholder feedback is important for implementation outcomes. An injury reduction program may improve shoulder function, and time along with belief in effectiveness are important factors to improve implementation.
Hamiltonian formulation of a class of constrained fourth-order differential equations in the Ostrogradsky framework
Creators: name: Öttinger, Hans Christian
Publisher: name: arXiv
Year: 2018
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We consider a class of Lagrangians that depend not only on some configurational variables and their first time derivatives, but also on second time derivatives, thereby leading to fourth-order evolution equations. The proposed higher-order Lagrangians are obtained by expressing the variables of standard Lagrangians in terms of more basic variables and their time derivatives. The Hamiltonian formulation of the proposed class of models is obtained by means of the Ostrogradsky formalism. The structure of the Hamiltonians for this particular class of models is such that constraints can be introduced in a natural way, thus eliminating expected instabilities of the fourth-order evolution equations. Moreover, canonical quantization of the constrained equations can be achieved by means of Dirac's approach to generalized Hamiltonian dynamics.
description: 8 pages
LOOK GOOD PLAY GOOD? A QUANTITATIVE INVESTIGATION OF THE EFFECT OF AN APPAREL PROVIDER ON ON-FIELD PERFORMANCE.
Creators: name: Corry, Noah
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2024

description: In the landscape of college athletics, achieving success in football has become paramount for athletic departments, in terms of both institutional pride and financial sustainability. As administrators seek every advantage to enhance on-field performance, partnerships with apparel providers have emerged as a significant consideration. This study examines the relationship between various factors and the on-field performance of Football Bowl Subdivision (FBS) teams, focusing particularly on the impact of apparel providers. Through a comprehensive analysis of data encompassing multiple seasons, and running two random effects models it was found that apparel providers do not exert a statistically significant influence on FBS football teams' on-field performance. However, the study reveals several other factors that do correlate with team success. Notably, the number of bowl games played in, recruiting ranking, membership in a Group of Five conference, and the number of home games emerged as significant predictors of on-field performance. These findings shed light on the complex dynamics shaping the success of FBS football teams, highlighting the importance of diverse factors beyond the realm of apparel providers in determining team performance.
Bound States in Curved Quantum Layers
Creators: name: Duclos, Pierre
name: Exner, Pavel
name: Krejcirik, David
Publisher: name: arXiv
Year: 2001
Subjects: subject: Mathematical Physics (math-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Spectral Theory (math.SP)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 81Qxx;58Jxx

description: We consider a nonrelativistic quantum particle constrained to a curved layer of constant width built over a non-compact surface embedded in $R^3$. We suppose that the latter is endowed with the geodesic polar coordinates and that the layer has the hard-wall boundary. Under the assumption that the surface curvatures vanish at infinity we find sufficient conditions which guarantee the existence of geometrically induced bound states.
description: 20 pages in LaTeX
A FACTOR MODEL BASED APPROACH TO ESTIMATE CLASSIFICATION AGREEMENT ACROSS SCREENING MEASURES
Creators: name: Millechek, Jeno
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2024

description: There is a plethora of psychological screeners that are used to flag individuals for the potential presence of many common mental health diagnoses. Although screeners are not used for definitive diagnosis, they are used to determine whether someone is advised to receive further evaluation (i.e., at a primary care physician’s office) and used as a method to classify individuals into groups for research purposes (e.g., depressed or not depressed). This paper presents the FAMILIAR method, a novel approach to estimating classification agreement between screeners using bivariate distributions of factor model implied sum scores. A series of simulation studies were conducted to assess parameter recovery of the FAMILIAR method and results are reported, including raw bias, relative bias, and mean square error of the estimates. The performance of bootstrapped confidence intervals of the estimates and applied examples of the FAMILIAR method with real-world data are also reported.
Phase Transitions in Neutron Stars
Creators: name: Dexheimer, V.
name: Soethe, L. T. T.
name: Roark, J.
name: Gomes, R. O.
name: Kepler, S. O.
name: Schramm, S.
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In this paper we review the most common descriptions for the first order phase transition to deconfined quark matter in the core of neutron stars. We also present a new description of these phase transitions in the core of proto-neutron stars, in which more constraints are enforced so as to include trapped neutrinos. Finally, we calculate the emission of gravitational waves associated with deconfinement phase transitions, discuss the possibility of their detection, and how this would provide information about the equation of state of dense matter.
description: Invited review for the International Journal of Modern Physics E
Coryphophthalmus VERHOEFF 1910
Creators: name: Kaplin, V. G.
name: Kiseleva, L. V.
name: Kozhevnikova, O. P.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Archaeognatha
Machilidae
Coryphophthalmus

description: Genus Coryphophthalmus Verhoeff, 1910
 Type species: Coryphophthalmus banaticus Verhoeff, 1910.
description: Published as part of Kaplin, V. G., Kiseleva, L. V. & Kozhevnikova, O. P., 2020, NEW SPECIES OF BRISTRLETAILS OF THE GENUS CORYPHOPHTHALMUS VERHOEFF, 1910 (ARCHAEOGNATHA: MACHILIDAE) FROM NORTH AND SOUTH OSSETIA, pp. 1-13 in Far Eastern Entomologist 406 on page 2, DOI: 10.25221/fee.406.1, http://zenodo.org/record/7165475
title: Protracted transition. Management of residential built heritage  in the historic center of Rostov-on-Don, Russia
Creators: name: Batunova, Elena
name: Davletshina, Albina
name: Neugebauer, Carola
Publisher: name: Conference Proceedings  XXIX International Seminar on Urban Form ISUF 2022 Urban Redevelopment and Revitalisation A Multidisciplinary Perspective/ Lodz University of Technology Press
Year: 2022
Subjects: Built heritage, Urban fabric, Institutional practices, Post-socialist transition, Russia

description: Abstract: In urban development, residential heritage is a space for the challenging process of demarcation and negotiation between public and private. The complexity increases when the relationship between the public and the individual changes dramatically, and the evolution of rules defining this relationship is not complete. Since the USSR collapsed, large Russian cities have transformed radically due to the privatization of land and real estate, commercialization of urban space, and the increasing role of non-state actors in urban development. At the same time, most of these processes are not finalized. There are "ownerless" land plots, buildings, or infrastructures in a highly fragmented urban fabric and contradictions or gaps in the legal framework related to responsibilities, obligations, and rights in the field of urban development. Based on the case of the historic center of Rostov-on-Don in Russia, the paper examines how institutional transition influences the existing institutional approaches to residential heritage use, management, and preservation. Our findings demonstrated the transitional context largely determines the existing practices, and the local institutions cannot overcome the existing gaps and contradictions in legislation, property rights definition, and management.
Additional file 1 of Proteomic profiling of circulating plasma exosomes reveals novel biomarkers of Alzheimer’s disease
Creators: name: Cai, Huimin
name: Pang, Yana
name: Wang, Qi
name: Qin, Wei
name: Wei, Cuibai
name: Li, Ying
name: Li, Tingting
name: Li, Fangyu
name: Wang, Qigeng
name: Li, Yan
name: Wei, Yiping
name: Jia, Longfei
Publisher: name: figshare
Year: 2022
Subjects: subject: Biochemistry
subject: Cell Biology
subject: Molecular Biology
subject: Neuroscience
subject: Chemical Sciences not elsewhere classified
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer

description: Additional file 1: Table S1. ELISA kits information. Table S2. The association between exosomal protein levels and MMSE scores in Dataset 2. Materials and methods.
ASSESSING THE EFFECTS OF MENSTRUAL CYCLE PHASE ON ACUTE HIGH INTENSITY INTERVAL TRAINING EXERCISE PERFORMANCE AND FATIGUE IN HEALTHY WOMEN
Creators: name: Joniak, Kelly
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2024

description: This study assessed menstrual cycle (MC) effects on high intensity exercise performance (CP, AWC, AP, and PP), fatigue (PD, %PD, and PDec, fatigue, and sleepiness), and cravings in naturally-menstruating and contraceptive-using females. Thirty-five participants were randomized to MC phase and HIIT order with a crossover design. MC did not impact exercise performance as no significant phase differences were found [FP-LP; Average Power (AP) Δ ± SE:0.46 ± 0.92 W; Peak Power (PP): 3.66 ± 2.11 W]. The MC may affect fatigue as power decrement (FP-LP; Δ ± SE: 10.08 ± 3.10W) and %PD (FP-LP; Δ ± SE: 3.39 ± 1.34%) were significantly different between phases. Feelings of fatigue (FP - LP; Δ ± SD: -5.69 ± 12.08) and sleepiness (FP - LP; Δ ± SD: -3.34 ± 9.70) were greater during the LP. MC does not appear to influence high intensity exercise, but fatigue may be greater during the FP.
A Covariant Entropy Conjecture
Creators: name: Bousso, Raphael
Publisher: name: arXiv
Year: 1999
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We conjecture the following entropy bound to be valid in all space-times admitted by Einstein's equation: Let A be the area of any two-dimensional surface. Let L be a hypersurface generated by surface-orthogonal null geodesics with non-positive expansion. Let S be the entropy on L. Then S does not exceed A/4. We present evidence that the bound can be saturated, but not exceeded, in cosmological solutions and in the interior of black holes. For systems with limited self-gravity it reduces to Bekenstein's bound. Because the conjecture is manifestly time reversal invariant, its origin cannot be thermodynamic, but must be statistical. Thus it places a fundamental limit on the number of degrees of freedom in nature.
description: 41 pages, 7 figures. v2,v3: references added
Massive star winds and HMXB donors
Creators: name: Sander, Andreas A. C.
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Understanding the complex behavior of High Mass X-ray binaries (HMXBs) is not possible without detailed information about their donor stars. While crucial, this turns out to be a challenge on multiple fronts. First, multi-wavelength spectroscopy is vital. As such systems can be highly absorbed, this is often already hard to accomplish. Secondly, even if the spectroscopic data is available, the determination of reliable stellar parameters requires sophisticated model atmospheres that accurately describe the outermost layers and the wind of the donor star. For early-type donors, the stellar wind is radiatively driven and there is a smooth transition between the outermost layers of the star and the wind. The intricate non-LTE conditions in the winds of hot stars complicate the situation even further, as proper model atmospheres need to account for a multitude of physics to accurately provide stellar and wind parameters. The latter are especially crucial for the so-called "wind-fed" HXMBs, where the captured wind of the supergiant donor is the only source for the material accreted by the compact object. In this review I will address the different approaches for treating stellar winds in the analysis of HMXBs. Fundamentals of stellar atmosphere modeling are discussed, also addressing the limitations of modern models and examples from recent analysis results for particular HMXBs. Moreover, the path for the next generation of stellar atmosphere models will be outlined, where models can be used not only for measurements, but also to make predictions and provide a laboratory for theoretical conclusions. Stellar atmospheres are a key tool in understanding HMXBs, e.g. by providing insights about the accretion of stellar winds onto the compact object, or by placing the studied systems in the correct evolutionary context in order to identify potential gravitational wave (GW) progenitors.
description: 11 pages, 1 figure, to appear in the proceedings of the IAU Symposium No. 346 "High-mass X-ray binaries: illuminating the passage from massive binaries to merging compact objects"
Poeschl-Teller paradoxes
Creators: name: Znojil, Miloslav
Publisher: name: arXiv
Year: 2001
Subjects: subject: Mathematical Physics (math-ph)
subject: Spectral Theory (math.SP)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 35E25; 81Q05

description: Poeschl-Teller trigonometric potential well is PT symmetrically regularized at its "impenetrable" end-point barriers. This gives the four different solvable generalizations of the model and enables us to clarify some paradoxes encountered, in the SUSY context, in the classically forbidden coupling regime.
description: 12 p., latex, 4 ps figures, seminar for Doppler Institute (Prague)
Investigating Dynamics of Social Edupreneurship towards Combatting Educational Marginalization in the MENA Region
Creators: name: Hussain, Khairunnisa' Mohamed
Publisher: name: Manara - Qatar Research Repository
Year: 2025
Subjects: classificationCode: 50
subject: Philosophy and religious studies

description: With the advent of technology in recent decades, entrepreneurship is increasingly being viewed as an essential tool of empowerment. Social entrepreneurship, in particular, helps to transform conservative minds into innovative shapers and create extensive opportunities across all fields of knowledge. This research study aims to investigate the exogenous and internal factors responsible for entrepreneurial activity in the MENA region—with specific focus on Qatar and Morocco—as well as understand the roles played by various stakeholders within the local entrepreneurship ecosystems in the region. A series of interviews with entrepreneurs and key training providers in Qatar and Morocco was conducted, along with comprehensive analyses of relevant legal documents and governmental reports. The findings underline the importance of government involvement and bureaucratic assistance in ensuring entrepreneurial growth and success for local youth and new business ventures. Socioeconomic factors, such as gender and culture, as well as individual attitudes to risk, also affect the productivity and efficiency of entrepreneurship in Qatar and Morocco. Furthermore, both governmental and non-governmental bodies were found to play crucial roles in advancing local entrepreneurial standards. Understanding the dynamics of entrepreneurship in these two Arab nations enables the formulation of effective strategies and policies in order to benefit the society at large.
Infrared bands of CS2 dimer and trimer at 4.5 cm-1
Creators: name: Barclay, A. J.
name: Esteki, K.
name: Michaelian, K. H.
name: McKellar, A. R. W.
name: Moazzen-Ahmadi, N.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: FOS: Physical sciences

description: We report observation of new infrared bands of (CS2)2 and (CS2)3 in the region of the CS2 ν1+ ν3 combination band (at 4.5 cm-1) using a quantum cascade laser. The complexes are formed in a pulsed supersonic slit-jet expansion of a gas mixture of carbon disulfide in helium. We have previously shown that the most stable isomer of (CS2)2 is a cross-shaped structure with D2d symmetry and that for (CS2)3 is a barrel-shaped structure with D3 symmetry. The dimer has one doubly degenerate infrared-active band in the ν1+ ν3 region of the CS2 monomer. This band is observed to have a rather small vibrational shift of -0.846 cm-1. We expect one parallel and one perpendicular infrared-active band for the trimer but observe two parallel and one perpendicular bands. Much larger vibrational shifts of -8.953 cm-1 for the perpendicular band and -8.845 cm-1 and +16.681 cm-1 for the parallel bands are observed. Vibrational shifts and possible vibrational assignments, in the case of the parallel bands of the trimer, are discussed using group theoretical arguments.
description: 24 pages, 5 figures and 2 tables
How Protest Works, Even When It Doesn't
Creators: name: Ploeger, Raye
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2024

description: Protest is often thought to be a good and appropriate response to injustice. One reason for this isthat protest can bring unjust states of affairs to an end. But many people think that protest can be agood thing even when it does not have this kind of result. In this paper, I put forward anexplanation for why such “ineffective” protests can be good. I go about this by (i) arguing that thereexists conceptual space for a particular speech act, Speech Act X, (ii) showing that Speech Act X isan especially appropriate response to injustice, and then (iii) arguing that protest is Speech Act X.
Darboux first integral conditions and integrability of the 3D Lotka-Volterra system
Creators: name: Cairó, Laurent
Publisher: name: arXiv
Year: 2000
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We apply the Darboux theory of integrability to polynomial ODE's of dimension 3. Using this theory and computer algebra, we study the existence of first integrals for the 3-dimensional Lotka-Volterra systems with polynomial invariant algebraic solutions linear and quadratic and determine numerous cases of integrability.
title: Impfen gegen COVID-19
Creators: name: Dübel, Stefan
Publisher: name: Cuvillier
Year: 2022
Subjects: subject: Jahrbuch der BWG
subject: Brunsvicensien der Universitätsbibliothek Braunschweig
subject: 614.4

description: Jahrbuch der Braunschweigischen Wissenschaftlichen Gesellschaft, vol. 2021Jahrbuch 2021 der Braunschweigischen Wissenschaftlichen Gesellschaft, vol. 2021, p. 237
The Socioecoethical Model of Ethical Social Work
Creators: name: Munir Moosa Sadruddin
Publisher: name: Zenodo
Year: 2020
Subjects: The Socioecoethical Model of Ethical Social Work
Model of Social Work
Model of Ethical Social Work
The Socioecoethical Model of human rights education
Munir

description: The Socioecoethical Model of Ethical Social Work, adapted from Munir's Socioecoethical Model of Human Rights Education, is a sustainable and ethical approach to social work. This model is focused on providing social, educational, and moral support to vulnerable populations, including elderly individuals, orphans, children with cancer, street kids, people with disabilities, acid burn victims, widows, and more. The model is designed to foster socialization, increase awareness, and offer various therapeutic activities such as art therapy, game therapy, mental health counseling, gift distribution, and competitions. Additionally, spending quality time with these individuals is a key aspect of the model. The ultimate goal of this approach is to foster empathy and engagement from others to help improve the lives of these vulnerable populations.
Testing Feedback Regulated Star Formation in Gas Rich, Turbulent Disk Galaxies
Creators: name: Fisher, Deanne B
name: Bolatto, Alberto D.
name: White, Heidi
name: Glazebrook, Karl
name: Abraham, Roberto G.
name: Obreschkow, Danail
Publisher: name: arXiv
Year: 2018
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In this paper we compare the molecular gas depletion times and mid-plane hydrostatic pressure in turbulent, star forming disk galaxies to internal properties of these galaxies. For this analysis we use 17 galaxies from the DYNAMO sample of nearby ($z\sim0.1$) turbulent disks. We find a strong correlation, such that galaxies with lower molecular gas depletion time (t_{dep}) have higher gas velocity dispersion ($σ$). Within the scatter of our data, our observations are consistent with the prediction that depletion time is inversely proportionate to velocity dispersion made in theories of feedback-regulated star formation. We also show a strong, single power-law correlation between mid-plane pressure (P) and star formation rate surface density (Sigma_{SFR}), which extends for 6 orders of magnitude in pressure. Disk galaxies with lower pressure are found to be roughly in agreement with theoretical predictions. However, in galaxies with high pressure we find P/Sigma_{SFR} values that are significantly larger than theoretical predictions. Our observations could be explained with any of the following: (1) the correlation of Σ_{SFR}-P is significantly sub-linear; (2) the momentum injected from star formation feedback (so-called p*/m*) is not a single, universal value; or (3) alternate sources of pressure support are important in gas-rich disk galaxies. Finally using published survey results, we find that our results are consistent with the cosmic evolution of t_{dep}(z) and velocity dispersion. Our interpretation of these results is that the cosmic evolution of t_{dep} may be regulated not just by the supply of gas, but also the internal regulation of star formation via feedback.
description: Accepted to ApJ
title: Haus- und Wanderratten und die Verbreitung der Pest
Creators: name: Wieden, Brage
Publisher: name: Cuvillier
Year: 2022
Subjects: subject: Jahrbuch der BWG
subject: Brunsvicensien der Universitätsbibliothek Braunschweig
subject: 610.9

description: Jahrbuch der Braunschweigischen Wissenschaftlichen Gesellschaft, vol. 2021Jahrbuch 2021 der Braunschweigischen Wissenschaftlichen Gesellschaft, vol. 2021, p. 187
On the Distribution of zeros of chaotic wavefunction
Creators: name: Shukla, Pragya
Publisher: name: arXiv
Year: 1997
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The wavefunctions in phase-space representation can be expressed as entire functions of their zeros if the phase space is compact. These zeros seem to hide a lot of relevant and explicit information about the underlying classical dynamics. Besides, an understanding of their statistical properties may prove useful in the analytical calculations of the wavefunctions in quantum chaotic systems. This motivates us to persue the present study which by a numerical statistical analysis shows that both long as well as the short range correlations exist between zeros; while the latter turn out to be universal and parametric-independent, the former seem to be system dependent and are significantly affected by various parameters i.e symmetry, localization etc. Furthermore, for the delocalized quantum dynamics, the distribution of these zeros seem to mimick that of the zeros of the random functions as well as random polynomials.
description: PlainTex, Seven figures (available on direct request to author), J.Phys. (in Press)
Algebraic Holography
Creators: name: Rehren, K. -H.
Publisher: name: arXiv
Year: 1999
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A rigorous (and simple) proof is given that there is a one-to-one correspondence between causal anti-deSitter covariant quantum field theories on anti-deSitter space and causal conformally covariant quantum field theories on its conformal boundary. The correspondence is given by the explicit identification of observables localized in wedge regions in anti-deSitter space and observables localized in double-cone regions in its boundary. It takes vacuum states into vacuum states, and positive-energy representations into positive-energy representations.
description: 16 pages, 1 figure, v3: new material added in response to referees' reports, v4: a hasty conclusion in v3 rectified + more cosmetic changes
The Socioecoethical Model of Ethical Social Work
Creators: name: Sadruddin, Munir Moosa
Publisher: name: Zenodo
Year: 2023
Subjects: The Socioecoethical Model of Ethical Social Work
Model of Social Work
Model of Ethical Social Work
The Socioecoethical Model of human rights education
Munir

description: The Socioecoethical Model of Ethical Social Work, adapted from Munir's Socioecoethical Model of Human Rights Education, is a sustainable and ethical approach to social work. This model is focused on providing social, educational, and moral support to vulnerable populations, including elderly individuals, orphans, children with cancer, street kids, people with disabilities, acid burn victims, widows, and more. The model is designed to foster socialization, increase awareness, and offer various therapeutic activities such as art therapy, game therapy, mental health counseling, gift distribution, and competitions. Additionally, spending quality time with these individuals is a key aspect of the model. The ultimate goal of this approach is to foster empathy and engagement from others to help improve the lives of these vulnerable populations.
Gravity-driven instability in a spherical Hele-Shaw cell
Creators: name: Miranda, Jose A.
name: Parisio, Fernando
name: Moraes, Fernando
name: Widom, Michael
Publisher: name: arXiv
Year: 2000
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Pattern Formation and Solitons (nlin.PS)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: A pair of concentric spheres separated by a small gap form a spherical Hele-Shaw cell. In this cell an interfacial instability arises when two immiscible fluids flow. We derive the equation of motion for the interface perturbation amplitudes, including both pressure and gravity drivings, using a mode coupling approach. Linear stability analysis shows that mode growth rates depend upon interface perimeter and gravitational force. Mode coupling analysis reveals the formation of fingering structures presenting a tendency toward finger tip-sharpening.
description: 13 pages, 4 ps figures, RevTex, to appear in Physical Review E
A spin-statistics theorem for quantum fields on curved spacetime manifolds in a generally covariant framework
Creators: name: Verch, Rainer
Publisher: name: arXiv
Year: 2001
Subjects: subject: Mathematical Physics (math-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A model-independent, locally generally covariant formulation of quantum field theory over four-dimensional, globally hyperbolic spacetimes will be given which generalizes similar, previous approaches. Here, a generally covariant quantum field theory is an assignment of quantum fields to globally hyperbolic spacetimes with spin-structure where each quantum field propagates on the spacetime to which it is assigned. Imposing very natural conditions such as local general covariance, existence of a causal dynamical law, fixed spinor- or tensor-type for all quantum fields of the theory, and that the quantum field on Minkowski spacetime satisfies the usual conditions, it will be shown that a spin-statistics theorem hols: If for some spacetimes the corresponding quantum field obeys the "wrong" connection between spin and statistics, then all quantum fields of the theory, on each spacetime, are trivial.
description: latex2e, 1 figure, 32 pages
Study of auditory verbal hallucinations in schizophrenia from image analysis by Functional Magnetic Resonance Imaging.
Creators: name: Moraga, Raúl Pérez
name: García-García, Francisco
name: Iglesia-Vayá, María De La
Publisher: name: figshare
Year: 2019
Subjects: subject: Neuroscience
subject: 60102 Bioinformatics
subject: FOS: Computer and information sciences

description: Schizophrenia is a multivariate and complex illness, where genetic and social-economics factors play an important role in the disruption of brain functioning. Psychopathology symptoms could divide in two types, negative and positive. Negative symptoms refer to an absence or lack of healthy mental function behavior and perception. Positive symptoms are the delusions and hallucinations, being one key part of them the auditory verbal hallucinations (AVH). AVHs are a convictions that other individuals are talking to the patient despite the absence of an external auditory signal.
Using pedagogical approaches through fairytales for pre-schoolers  in English as second language
Creators: name: Israilova Dildora
Publisher: name: Zenodo
Year: 2024

description: Abstract. Practice shows that fairy tales are a source of early learning a foreign language. As an element of folklore, fairy tales have great potential for the development of moral qualities, mental abilities and volitional behavior. They vividly express the identity of the people, its culture, traditions, moral foundations, features of national life.

Key words: preschool age, fairy tale, folklore, moral principles, national way of life, self-expression, education, upbringing.
Link between trees of fragmenting granules and deep downflows in MHD simulation
Creators: name: Roudier, T.
name: Malherbe, J. M.
name: Stein, R. F.
name: Frank, Z.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Trees of fragmenting granules (TFG) and associated flows are suspected to playa major role in the formation of the network in the quiet Sun. We investigate the counterparts, in terms of dynamics, of surface structures detectable by high resolution observations in deeper layers up to 15 Mm, which are only available from numerical simulations. The first aim is to demonstrate that TFG can be evidenced either from surface intensitites, vertical (Vz), or Doppler (Vdop) velocities. The second is to show that horizontal flows, which are derived from intensities or Vz/Vdop flows, are in good agreement, and that this is the case for observations and numerical simulations. The third objective is to apply this new Vz-based method to a 3D simulation to probe relationships between horizontal surface flows, TFG, and deep vertical motions. The TFG were detected after oscillation filtering of intensities or Vz/Vdop flows, using a segmentation and labelling technique. Surface horizontal flows were derived from local correlation tracking (LCT) and from intensities or Vz/Vdop flows. These methods were applied to Hinode observations, 2D surface results of a first simulation, and 3D Vz data of a second simulation. We find that TFG and horizontal surface flows (provided by the LCT) can be detected either from intensities or Vz/Vdop component, for high resolution observations and numerical simulations. We apply this method to a 3D run providing the Vz component in depth. This reveals a close relationship between surface TFG (5 Mm mesoscale) and vertical downflows 5 Mm below the surface. We suggest that the dynamics of TFG form larger scales (the 15-20 Mm supergranulation) associated with 15 Mm downflowing cells below the surface. The TFG and associated surface flows seem to be essential to understanding the formation and evolution of the network at the meso and supergranular scale.
description: 12 pages, 15 figures , 7 movies
Damage spreading in random field systems
Creators: name: Vojta, Thomas
Publisher: name: arXiv
Year: 1997
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We investigate how a quenched random field influences the damage spreading transition in kinetic Ising models. To this end we generalize a recent master equation approach and derive an effective field theory for damage spreading in random field systems. This theory is applied to the Glauber Ising model with a bimodal random field distribution. We find that the random field influences the spreading transition by two different mechanisms with opposite effects. First, the random field favors the same particular direction of the spin variable at each site in both systems which reduces the damage. Second, the random field suppresses the magnetization which, in turn, tends to increase the damage. The competition between these two effects leads to a rich behavior.
description: 4 pages RevTeX, 3 eps figures
Metal-Insulator transition in 8-Pmmn Borophene under perpendicular incidence of electromagnetic radiation
Creators: name: Champo, Abdiel E.
name: Naumis, Gerardo G.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The energy spectrum for the problem of 8-Pmmn borophene's electronic carriers under perpendicular incidence of electromagnetic waves is studied without the use of any perturbative technique. This allows to study the effects of very strong fields. To obtain the spectrum and wavefunctions, the time-dependent Dirac equation is solved by using a frame moving with the space-time cone of the wave, i.e., by transforming the equation into an ordinary differential equation in terms of the wave-phase, leading to an electron-wave quasiparticle. The limiting case of strong fields is thus analyzed.The resulting eigenfunctions obey a generalized Mathieu equation,i.e., of a classical parametric pendulum. The energy spectrum presents bands, and a gap at the Fermi energy. The gaps are due to the space-time diffraction of electrons in phase with the electromagnetic field, i.e., electrons in borophene acquire an effective mass under strong electromagnetic radiation
description: arXiv admin note: text overlap with arXiv:1707.08469 by other authors
Renormalization Group and the Melnikov Problem for PDE's
Creators: name: Bricmont, Jean
name: Kupiainen, Antti
name: Schenkel, Alain
Publisher: name: arXiv
Year: 2001
Subjects: subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We give a new proof of persistence of quasi-periodic, low dimensional elliptic tori in infinite dimensional systems. The proof is based on a renormalization group iteration that was developed recently in [BGK] to address the standard KAM problem, namely, persistence of invariant tori of maximal dimension in finite dimensional, near integrable systems. Our result covers situations in which the so called normal frequencies are multiple. In particular, it provides a new proof of the existence of small-amplitude, quasi-periodic solutions of nonlinear wave equations with periodic boundary conditions.
description: 44 pages, plain TeX
Semiclassical Calculation of Shell Effects in Deformed Nuclei
Creators: name: Brack, M.
name: Amann, Ch.
Publisher: name: arXiv
Year: 2000
Subjects: subject: Nuclear Theory (nucl-th)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We summarize recent work in which the shell effect, which causes the onset of the mass asymmetry in nuclear fission, could be explained semiclassically in the framework of the periodic orbit theory. We also present new results for the inclusion of a spin-orbit interaction in the semiclassical calculation of the level density.
description: 8 pages, 4 figures; Conference contribution to "Fission dynamics of atomic clusters and nuclei" (Luso, Portugal, May 15-20, 2000) eds. D. Brink et al. (World Scientific Press, Singapore, 2001); in press
TАSVIIY SАN'АTNI BUGUNGI KUNDАGI O'RNI
Creators: name: Mirxosilovа, Bаshorаt
Publisher: name: Zenodo
Year: 2024

description: Ushbu mаqolа XIX аsrdа tаsviriy sаnʼаtning rivojlаnаyotgаn mаnzаrаsi, texnologik tаrаqqiyot, tаsviriy sаnʼаtning bugungi kundаgi oʻrni, rаqаmli plаtformаlаr orqаli sаnʼаtni demokrаtlаshtirish, rivojlаnаyotgаn sаnʼаt bozorining tаʼsiri vа bаdiiy аmаliyotdа ijtimoiy vа siyosiy ishtirokkа eʼtibor kuchаyishi hаqidа muhokаmа qilаdi.
The two-dimensional quantum Heisenberg antiferromagnet: effective Hamiltonian approach to the thermodynamics
Creators: name: Cuccoli, Alessandro
name: Tognetti, Valerio
name: Vaia, Ruggero
name: Verrucchi, Paola
Publisher: name: arXiv
Year: 1997
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In this paper we present an extensive study of the thermodynamic properties of the two-dimensional quantum Heisenberg antiferromagnet on the square lattice; the problem is tackled by the pure-quantum self-consistent harmonic approximation, previously applied to quantum spin systems with easy-plane anisotropies, modeled to fit the peculiar features of an isotropic system. Internal energy, specific heat, correlation functions, staggered susceptibility, and correlation length are shown for different values of the spin, and compared with the available high-temperature expansion and quantum Monte Carlo results, as well as with the available experimental data.
description: 14 pages, 13 Postscript figures embedded by psfig.sty; revisions: paper shortened, some parts moved in the appendices, 4 figures replaced by 2 only, minor errors corrected
Molecular-Cloud-Scale Chemical Composition III: Constraints of Average Physical Properties through Chemical Models
Creators: name: Harada, Nanase
name: Nishimura, Yuri
name: Watanabe, Yoshimasa
name: Yamamoto, Satoshi
name: Aikawa, Yuri
name: Sakai, Nami
name: Shimonishi, Takashi
Publisher: name: arXiv
Year: 2018
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: It is important to understand the origin of molecular line intensities and chemical composition in the molecular-cloud scale in the Galactic sources because it serves as a benchmark to compare with the chemical compositions of extragalactic sources. Recent observations of the 3-mm spectra averaged over the 10-pc scale show similar spectral pattern among sources for molecular lines HCN, HCO$^+$, CCH, HNC, HNCO, c-C$_3$H$_2$, CS, SO, N$_2$H$^+$, and CN. To constrain the average physical property emitting such spectral pattern, we model molecular spectra using a time-dependent gas-grain chemical model followed by a radiative transfer calculation. We use a grid of physical parameters such as the density $n=3 \times 10^2 - 3\times 10^4$ cm$^{-3}$, the temperature, $T=10-30$ K, the visual extinction $A_{\rm V} = 2,4,10$ mag, the cosmic-ray ionization rate $ζ= 10^{-17} - 10^{-16}$ s$^{-1}$, and the sulfur elemental abundance $S/H = 8\times 10^{-8} - 8\times 10^{-7}$. Comparison with the observed spectra indicates that spectra are well reproduced with the relatively low density of $n=(1-3) \times 10^3\,$cm$^{-3}$, $T=10\,$K, $ζ= 10^{-17}$ s$^{-1}$, and the short chemistry timescale of $10^5$ yrs. This short chemistry timescale may indicate that molecular clouds are constantly affected by the turbulence, and exposed to low-density, low $A_{\rm V}$ regions that "refreshes" the chemical clock by UV radiation. The relatively low density obtained is orders of magnitude lower than the commonly-quoted critical density in the optically thin case. Meanwhile, this range of density is consistent with results from recent observational analysis of molecular-cloud-scale mapping.
description: 30 pages, 21 figures, accepted for publication in The Astrophysical Journal
Second order gauge invariant gravitational perturbations of a Kerr black hole
Creators: name: Campanelli, M.
name: Lousto, C. O.
Publisher: name: arXiv
Year: 1998
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate higher than the first order gravitational perturbations in the Newman-Penrose formalism. Equations for the Weyl scalar $ψ_4,$ representing outgoing gravitational radiation, can be uncoupled into a single wave equation to any perturbative order. For second order perturbations about a Kerr black hole, we prove the existence of a first and second order gauge (coordinates) and tetrad invariant waveform, $ψ_I$, by explicit construction. This waveform is formed by the second order piece of $ψ_4$ plus a term, quadratic in first order perturbations, chosen to make $ψ_I$ totally invariant and to have the appropriate behavior in an asymptotically flat gauge. $ψ_I$ fulfills a single wave equation of the form ${\cal T}ψ_I=S,$ where ${\cal T}$ is the same wave operator as for first order perturbations and $S$ is a source term build up out of (known to this level) first order perturbations. We discuss the issues of imposition of initial data to this equation, computation of the energy and momentum radiated and wave extraction for direct comparison with full numerical approaches to solve Einstein equations.
description: 19 pages, REVTEX. Some misprints corrected and changes to improve presentation. Version to appear in PRD