cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Non-locality of Hydrodynamic and Magnetohydrodynamic Turbulence
Creators: name: Cho, Jungyeon
Publisher: name: arXiv
Year: 2010
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We compare non-locality of interactions between different scales in hydrodynamic (HD) turbulence and magnetohydrodynamic (MHD) turbulence in a strongly magnetized medium. We use 3-dimensional incompressible direct numerical simulations to evaluate non-locality of interactions. Our results show that non-locality in MHD turbulence is much more pronounced than that in HD turbulence. Roughly speaking, non-local interactions count for more than 10\% of total interactions in our MHD simulation on a grid of $512^3$ points. However, there is no evidence that non-local interactions are important in our HD simulation with the same numerical resolution. We briefly discuss how non-locality affects energy spectrum.
description: 6 pages, 5 figures
On the fragmentation criteria of self-gravitating protoplanetary discs
Creators: name: Meru, Farzana
name: Bate, Matthew R.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We investigate the fragmentation criterion in massive self-gravitating discs. We present new analysis of the fragmentation conditions which we test by carrying out global three-dimensional numerical simulations. Whilst previous work has placed emphasis on the cooling timescale in units of the orbital timescale, β, we find that at a given radius the surface mass density (i.e. disc mass and profile) and star mass also play a crucial role in determining whether a disc fragments or not as well as where in the disc fragments form. We find that for shallow surface mass density profiles (p<2, where Σ\propto R^{-p}), fragments form in the outer regions of the disc. However for steep surface mass density profiles (p \gtrsim 2), fragments form in the inner regions of a disc. In addition, we also find that the critical value of the cooling timescale in units of the orbital timescale found in previous simulations is only applicable to certain disc surface mass density profiles and for particular disc radii and is not a general rule for all discs. We find an empirical fragmentation criteria between the cooling timescale in units of the orbital timescale, β, the surface mass density, the star mass and the radius.
description: Accepted for publication by MNRAS. 15 pages, 18 figures
From Skew-Cyclic Codes to Asymmetric Quantum Codes
Creators: name: Ezerman, Martianus Frederic
name: Ling, San
name: Sole, Patrick
name: Yemen, Olfa
Publisher: name: arXiv
Year: 2010
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences
subject: 58F15, 58F17 (Primary) 53C35 (Secondary)

description: We introduce an additive but not $\mathbb{F}_4$-linear map $S$ from $\mathbb{F}_4^{n}$ to $\mathbb{F}_4^{2n}$ and exhibit some of its interesting structural properties. If $C$ is a linear $[n,k,d]_4$-code, then $S(C)$ is an additive $(2n,2^{2k},2d)_4$-code. If $C$ is an additive cyclic code then $S(C)$ is an additive quasi-cyclic code of index $2$. Moreover, if $C$ is a module $θ$-cyclic code, a recently introduced type of code which will be explained below, then $S(C)$ is equivalent to an additive cyclic code if $n$ is odd and to an additive quasi-cyclic code of index $2$ if $n$ is even. Given any $(n,M,d)_4$-code $C$, the code $S(C)$ is self-orthogonal under the trace Hermitian inner product. Since the mapping $S$ preserves nestedness, it can be used as a tool in constructing additive asymmetric quantum codes.
description: 16 pages, 3 tables, submitted to Advances in Mathematics of Communications
High-speed photoconductivity of GaP light-emitting diodes at liquid-nitrogen temperature
Creators: name: Moser, K.
name: Eisfeld, W.
name: Prettl, Wilhelm
Publisher: name: Universität Regensburg
Year: 1985
Subjects: subject: 530 Physik

description: In GaP : N (Zn,Te) light-emitting diodes, extrinsic photoconductivity was excited by modelocked TEA CO2 laser pulses at liquid-nitrogen temperature, showing a current sensitivity of 2.10−5 A/W and a response time of the order of 0.5 ns.
Frustrated multiband superconductivity
Creators: name: Dias, R. G.
name: Marques, A. M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We show that a clean multiband superconductor may display one or several phase transitions with increasing temperature from or to frustrated configurations of the relative phases of the superconducting order parameters. These transitions may occur when more than two bands are involved in the formation of the superconducting phase and when the number of repulsive interband interactions is odd. These transitions are signalled by slope changes in the temperature dependence of the superconducting gaps.
description: 5 pages, 3 figures
Review on dynamically generated resonances
Creators: name: Oset, E.
name: Molina, R.
name: Nicmorus, D.
name: Geng, L. S.
name: Gonzalez, P.
name: Vijande, J.
name: Sarkar, S.
name: Sun, Bao Xi
name: Vacas, M. J. Vicente
name: Ramos, A.
name: Garzon, E. J.
name: Torres, A. Martinez
name: Khemchandani, K.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We present recent results on the vector meson-vector meson and vector meson-baryon interaction using a unitary approach based on the hidden-gauge Lagrangians. For the vector-vector case we find that 11 states get dynamically generated, corresponding to poles of the scattering matrices on the second Riemann sheet. In the vector-baryon sector we also find 9 states dynamically generated from the vector-baryon octet interaction and 10 from the vector-baryon decuplet interaction. We also report on baryon states found from the interaction of two mesons and a baryon.
description: Lectures given at the New Frontiers in QCD 2010 Workshop, Kyoto, February 2010. 10 pages
Far-infrared photoconductivity as a probe for non-equilibrium phase transitions in n-GaAs
Creators: name: Obermaier, R.
name: Böhm, W.
name: Prettl, Wilhelm
name: Dirnhofer, P.
Publisher: name: Universität Regensburg
Year: 1984
Subjects: subject: 530 Physik

description: A strong enhancement of the cyclotron resonance induced FIR-photoconductivity has been observed in n-GaAs close to the threshold of impact ionization breakdown. The results are discussed in terms of phase transitions far from equilibrium showing that the photoconductivity reflects the Curie-Weiss behaviour of the generalized susceptibility.
Ultracold Atoms as a Target: Absolute Scattering Cross-Section Measurements
Creators: name: Würtz, P.
name: Gericke, T.
name: Vogler, A.
name: Ott, H.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We report on a new experimental platform for the measurement of absolute scattering cross-sections. The target atoms are trapped in an optical dipole trap and are exposed to an incident particle beam. The exponential decay of the atom number directly yields the absolute total scattering cross-section. The technique can be applied to any atomic or molecular species that can be prepared in an optical dipole trap and provides a large variety of possible scattering scenarios.
Impact ionization induced negative far-infrared photoconductivity inn-GaAs
Creators: name: Schöll, E.
name: Heisel, W.
name: Prettl, Wilhelm
Publisher: name: Universität Regensburg
Year: 1982
Subjects: subject: 530 Physik

description: Far-infrared photoconductivity ofn-GaAs epitaxial layers showing impact ionization breakdown has been investigated by molecular lasers at photon energies below the 1s-2p shallow donor transition energy. Negative photoconductivity was observed if a magnetic field was applied to the crystals and if impact ionization of donors by the electric bias field was the dominant electron excitation mechanism. The experimental results are qualitatively explained on the basis of the generation-recombination kinetics of electrons bound to donors. Negative photoconductivity is attributed to optically induced free to bound transitions of electrons from theN=0 Landau band to donor levels shifted by the magnetic field above the low energy edge of the conduction band.
Targeting and efficacy of novel mab806-antibody-drug conjugates in malignant mesothelioma
Creators: name: PL Chia
name: Sagun Parakh
name: MS Tsao
name: NA Pham
name: Gan, Hui
name: D Cao
name: Burvenich, Ingrid JG
name: Rigopoulos, Angela
name: EB Reilly
name: John, Thomas
name: Scott, Andrew
Publisher: name: La Trobe
Year: 2020
Subjects: Uncategorized

description: © 2020 by the authors. Licensee MDPI, Basel, Switzerland. Epidermal growth factor receptor (EGFR) is highly overexpressed in malignant mesothelioma (MM). MAb806 is a novel anti-EGFR antibody that selectively targets a tumor-selective epitope. MAb806-derived antibody drug conjugates (ADCs), ABT-414, ABBV-221 and ABBV-322, may represent a novel therapeutic strategy in MM. EGFR and mAb806 epitope expressions in mesothelioma cell lines were evaluated using an array of binding assays, and the in vitro cell effects of ABT-414 and ABBV-322 were determined. In vivo therapy studies were conducted in mesothelioma xenograft and patient-derived xenograft (PDX) tumor models. We also performed biodistribution and imaging studies to allow the quantitative targeting of MM by mAb806 using a89Zr-labeled immunoconjugate—ch806. A high EGFR expression was present in all mesothelioma cell lines evaluated and mAb806 binding present in all cell lines, except NCIH-2452. ABT-414 and ABBV-322 resulted in significant tumor growth inhibition in MM models with high EGFR and mAb806 epitope expressions. In contrast, in an EGFR-expressing PDX model that was negative for the mAb806 epitope, no growth inhibition was observed. We demonstrated the specific targeting of the mAb806 epitope expressing MM tumors using89Zr-based PET imaging. Our data suggest that targeting EGFR in MM using specific ADCs is a valid therapeutic strategy and supports further investigation of the mAb806 epitope expression as a predictive biomarker.
Navigating the Clouds on the Horizon: A Vision for Reproducible Hydrologic Modeling in the Cloud
Creators: name: Flores, Alejandro
Publisher: name: Zenodo
Year: 2021
Subjects: Pangeo
Hydrology
Water Management

description: This talk provides an overview of a new NSF project that will produce knowledge of how precipitation, snow, and runoff in the Snake River Basin will be impacted by climate variability and change, while also expanding the use of cloud computing in water science research. Although cloud computing is increasingly important in research, the water science community lacks training materials and case studies to onboard researchers to effective practices. This project addresses this tension by: (1) developing cloud computing solutions to three common computing uses in water science, (2) using those approaches to create datasets that characterize the effects of climate variability and change on hydrology in the Snake River Basin, and (3) designing and disseminating educational materials to train water scientists in the use of cloud computing. This project will produce scientific insights and datasets to help water managers prepare for climate change in the western US and prepare the next generation of water scientists in modern computing paradigms. Specific focus is paid here to how open and reproducible computing platforms are essential to this project and, importantly, can help advance co-production of knowledge and decision support for stakeholders in the realm of water management.
Gravitational collapse in Painlevé-Gullstrand coordinates
Creators: name: Kanai, Yuki
name: Siino, Masaru
name: Hosoya, Akio
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We construct an exact solution for the spherical gravitational collapse in a single coordinate patch. To describe the dynamics of collapse, we use a generalized form of the Painlevé-Gullstrand coordinates in the Schwarzschild spacetime. The time coordinate of the form is the proper time of a free-falling observer so that we can describe the collapsing star not only outside but also inside the event horizon in a single coordinate patch. We show the both solutions corresponding to the gravitational collapse from infinity and from a finite radius.
An Investigation Into P&G's Coconut Oil Supply Chain
Creators: name: Du, Cindy
Publisher: name: The University of Texas at Austin
Year: 2023
Subjects: Signature Course Information Literacy Award
human trafficking

description: This project won second place in the 2023 Signature Course Information Literacy Award. The award recognizes exemplary student work that achieves the learning outcomes of the Signature Course information literacy requirement, that students will be able to create and execute a research strategy, critically evaluate information, and navigate the scholarly conversation. Cindy Du's paper, "An Investigation into P&G's Coconut Oil Supply Chain," was nominated by Kirsta Melton, instructor for UGS 303: Modern Day Slavery. Dr. Melton said "The research paper for the Modern Day Slavery Course...requires students to choose a product they use regularly, break down its ingredients, identify one or more that are generated through exploitative labor practices, track the supply chain of the product and ingredients, analyze the labor exploitation and make independent recommendations for change. ...Ms. Du's research effort was significant and varied, with more than a dozen sources ranging from the company's website to industry publications, nonprofits and academic journals. ...She seamlessly integrated the research with her chosen theoretical framework--the ecological lens, when analyzing the factual situation, and when proposing recommendations for the industry and in addressing the limitations of her own work. Her paper demonstrates a willingness to push beyond conventional sourcing, a refusal to stop when her initial efforts did not yield an easy or direct answer, a sophistication in procuring, blending and analyzing multiple sources to generate creative independent solutions and a recognition of the need to identify for the reader where additional research could be done."
description: The coconut industry is rife with human trafficking and labor exploitation due to the farming practices used and the way the supply chain is structured. Though companies such as Cargill have been able to create sustainable and ethical supply chains for coconut oil by targeting these inferior practices through organizations like the Rainforest Alliance, a majority of coconut farmers are still subject to human trafficking and labor exploitation. Native deodorant claims that the natural deodorant they produce is sustainable and ethical, as being cruelty-free is a company value. However, the company, owned by P&G, uses coconut oil as one of the ingredients for its deodorant, and P&G currently sources its coconut oil from the Philippines and Indonesia, where human trafficking within the coconut industry, known as copra slavery, is abundant. Steps were taken in the research process to determine the stance of the company, the company’s supply chain, and the general supply chain for coconut oil. Though the company has entered a partnership to create a certifiably sustainable and transparent coconut oil supply
A Four-Stokes-Parameter Spectral Line Polarimeter at the Caltech Submillimeter Observatory
Creators: name: Hezareh, Talayeh
name: Houde, Martin
Publisher: name: arXiv
Year: 2010
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We designed and built a new Four-Stokes-Parameter spectral line Polarimeter (FSPPol) for the Caltech Submillimeter Observatory (CSO). The simple design of FSPPol does not include any mirrors or optical components to redirect or re-image the radiation beam and simply transmits the beam to the receiver through its retarder plates. FSPPol is currently optimized for observation in the 200-260 GHz range and measures all four Stokes parameters, I, Q, U, and V. The very low level of instrument polarization makes it possible to obtain reliable measurements of the Goldreich-Kylafis effect in molecular spectral lines. Accordingly, we measured a polarization fraction of a few percent in the spectral line wings of ^{12}\mathrm{CO} (J=2\rightarrow1) in Orion KL/IRc2, which is consistent with previous observations. We also used FSPPol to study the Zeeman effect in the N=2\rightarrow1 transition of CN in DR21(OH) for the first time. At this point we cannot report a Zeeman detection, but more observations are ongoing.
Understanding connections between older men's masculinities and physical activity
Creators: name: Thandi, Manpreet Kaur Gill
Publisher: name: University of British Columbia
Year: 2017

description: One of the most significant factors influencing the health of older men is their engagement in physical activity. Although the benefits of physical activity are well-established, inactivity tends to increase with aging, with men being at a significant risk of sedentary behaviour. Aging men may face significant pressures to embody dominant masculine ideals, affecting their motivations and experiences with physical activity. The purpose of this qualitative study was to enhance understanding of older men’s contextualized experiences with physical activity in their day-to-day lives, with an emphasis on the influence of masculinities on these experiences. These experiences were situated within socioecological and masculinities frameworks to assist healthcare providers develop health promotion interventions that are specific to older men, facilitating healthy aging and enhancing quality of life in this subpopulation. Four older men, over the age of 65, participated in in-depth data collection methods including an initial sit-down interview, three walk-along sessions, and photovoice, resulting in 2.17 hours of video, 10.17 hours of audio, and 54 pictures across the four men. An interpretive descriptive approach to data analysis was used to identify key areas of the men’s personal experiences with physical activity. Data analysis resulted in three key themes: Aging Male Bodies, Out in the Community, and Social Connectedness and Physical Activity. Findings from this study add to the growing knowledge around connections between older men, physical activity, and masculinities. Understanding the intersections between these factors will enhance understanding of older men’s experiences with physical activity in the context of their day-to-day lives, and assist healthcare providers develop health promotion programs targeted to the unique needs of older men.
The NWS Implementation of the OGC API - Environmental Data Retrieval
Creators: name: Mill, Shane
name: Olson, Steve
Publisher: name: Zenodo
Year: 2021
Subjects: Pangeo
National Weather Service
EDR API
Environmental Data

description: An Environmental Data Retrieval (EDR) API provides a family of lightweight interfaces to access Environmental Data resources. Each resource addressed by an EDR API maps to a defined query pattern. This specification identifies resources, captures compliance classes, and specifies requirements which are applicable to OGC Environmental Data Retrieval API’s. This specification addresses two fundamental operations; discovery and query. Discovery operations allow the API to be interrogated to determine its capabilities and retrieve information (metadata) about this distribution of a resource. This includes the API definition of the server as well as metadata about the Environmental Data resources provided by the server. Query operations allow Environmental Data resources to be retrieved from the underlying data store based upon simple selection criteria, defined by this standard and selected by the client. The National Weather Service's implementation of the EDR-API makes use of open source software such as ZARR, Xarray, and Dask to enable optimized access to large environmental datasets through the use of N-Dimensional indexed arrays. The use of these technologies allows for a flexible and scalable backend of data that can be modified to fit different use cases. The NWS is investigating how the EDR-API can enhance existing operational web services.
A new solvability criterion for finite groups
Creators: name: Dolfi, Silvio
name: Guralnick, Robert
name: Herzog, Marcel
name: Praeger, Cheryl
Publisher: name: arXiv
Year: 2011
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20D10, 20F16

description: In 1968, John Thompson proved that a finite group G is solvable if and only if every 2-generator subgroup of G is solvable. In this paper, we prove that solvability of a finite group G is guaranteed by a seemingly weaker condition: G is solvable if, for all conjugacy classes C and D of G consisting of elements of prime power order, there exist x in C and y in D with x and y generating a solvable group. We also prove the following property of finite nonabelian simple groups, which is the key tool for our proof of the solvability criterion: if G is a finite nonabelian simple group, then there exist two prime divisors a and b of |G| such that, for all elements x, y in G with |x|=a and |y|=b, the subgroup generated by x and y is not solvable. Further, using a recent result of Guralnick and Malle, we obtain a similar membership criterion for any family of finite groups closed under forming subgroups, quotients and extensions.
description: The results here are an improved version of the paper of the same name posted as arXiv:1007.5394 by the first, third and fourth authors
Cosmic acceleration and the challenge of modifying gravity
Creators: name: Trodden, Mark
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: I briefly discuss the challenges presented by attempting to modify general relativity to obtain an explanation for the observed accelerated expansion of the universe. Foremost among these are the questions of theoretical consistency - the avoidance of ghosts in particular - and the constraints imposed by precision local tests of gravity within the solar system. For those models that clear these highly constraining hurdles, modern observational cosmology offers its own suite of tests, improving with upcoming datasets, that offer the possibility of ruling out modified gravity approaches or providing an intriguing hint of new infrared physics. In the second half of the talk, I discuss a recent approach to extracting cosmology from higher-dimensional induced gravity models.
description: 15 pages, 1 figure. Plenary talk delivered at the 28th International Colloquium on Group Theoretical Methods in Physics, Newcastle, England, July 26-30, 2010
Exoplanets around G-K Giants
Creators: name: Döllinger, M. P.
name: Hatzes, A. P.
name: Pasquini, L.
name: Guenther, E. W.
name: Hartmann, M.
name: Setiawan, J.
name: Girardi, L.
name: de Medeiros, J. R.
name: da Silva, L.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: G and K giants are a class of radial velocity (RV) variables. One reason for this variability are planetary companions which are indicated in time series of stellar spectra. Since 2004 these spectra in the visual range were obtained with the high resolution coudé échelle spectrograph mounted on the 2m telescope of the Thüringer Landessternwarte Tautenburg (TLS) for a northern sample of 62 very bright K giants. In the South around 300 G and K giants were observed with HARPS mounted on the 3.6m telescope on La Silla. The TLS sample contains at least 11 stars (18 %) which show low-amplitude, long-period RV variations most likely due to planets. This percentage of planet frequency is confirmed by preliminary results of the HARPS study. Moreover the TLS survey seems to indicate that giant planets do not favour metal-rich stars, are more massive, and have longer periods than those found around solar-type host stars.
description: Part of PlanetsbeyondMS/2010 proceedings http://arxiv.org/html/1011.6606
Exploring music and piano playing with young children : a piano teacher's pedagogical stories
Creators: name: Ryu, Jee Yeon
Publisher: name: University of British Columbia
Year: 2017

description: The purpose of my inquiry is to learn more about how young children learn to play the piano through examining my own teaching practices. By using autoethnography (Adams, Jones, & Ellis, 2014; Bartleet & Ellis, 2009; Bochner & Ellis, 2016; Chang, 2008; Ellis, 2004, 2009; Ellis & Bochner, 2000; Jones, Adams, & Ellis, 2013; Reed-Danahay, 1997; Richardson, 2000) – as a creative non-fictional form of storytelling – my intent is (1) to illustrate a number of new, emerging perspectives and practices in piano pedagogy for young children through creative non-fiction stories; (2) to learn more about how my lived experiences of be(com)ing a piano teacher-researcher inform that practice; and (3) to determine the importance and value of piano teachers’ autoethnographies in the development of a piano pedagogy for young beginner learners and piano teacher education. Throughout the dissertation, I also include a series of photographs and videos to convey my students’ unique, individual ways of learning to play the piano. The mixed forms of visual, musical, and textual data capture how we have been exploring music and piano playing with one another. They are my metaphorical fragments of my life stories – of teaching, writing, and researching – concerning what it means to be with young children when exploring music and piano playing.
Investigating a Potential Link Between Prophage Activation and the DNA Damage Response in the E. coli Long-Term Evolution Experiment
Creators: name: Bhakta, Aneesa
Publisher: name: The University of Texas at Austin
Year: 2023
Subjects: Long-Term Evolution Experiment
E. coli
Prophage
SOS Response

description: The Long-Term Evolution Experiment (LTEE) is an open-ended endeavor to understand evolution through one of the simplest and quickest-replicating forms of life: Escherichia coli. Cultured in the lab since 1988, the 12 populations of E. coli in the LTEE have reached over 75,000 generations and accumulated many beneficial mutations in their genomes. One area of interest is a prophage from the P2/186 phage family called Rybb*B. Most prophage regions found in the genome of the ancestor of the LTEE are not functional, but Rybb*B was shown to be inducible by DNA damage. Additionally, past genome sequencing data showed evidence of more than one copy, on average, of the prophage region’s DNA per cell in the ancestor and clonal isolates from early generations, but not in later generations of all 12 LTEE populations. This extra sequencing coverage, as well as the presence of reads supporting a new junction in the DNA suggested that the prophage was stochastically replicating in these strains. However, the reason for the apparent decrease in the prophage copy number in later generations is unknown. I performed experiments to understand these unexplained changes in prophage activation. First, I measured prophage copy number in early strains of the LTEE using quantitative PCR (qPCR). Second, I used a reporter plasmid to test whether changes in the SOS DNA damage response evolved during the LTEE that might have affected stochastic prophage activation. Unlike in prior results, I found that Rybb*B prophage copy number remains relatively consistent throughout the early LTEE strains except for the ancestor which seems to have a higher prophage copy number. I also found that the SOS reporter is induced by azidothymidine similarly in strains from 5000 generations or earlier but does not appear to activate in strains from 10000 generations.
Additional file 1 of The Effects of Rf4 and the Genetic Mechanism Behind Fertility Restoration of Wild Abortive Cytoplasmic Male Sterility (WA-CMS) in Japonica Rice (Oryza sativa ssp. Japonica)
Creators: name: Zhang, Honggen
name: Li, Xixu
name: Xu, Zuopeng
name: Zhao, Xiangqiang
name: Wan, Zihao
name: Cheng, Xiaojun
name: Liu, Qiaoquan
name: Gu, Minghong
name: Tang, Shuzhu
Publisher: name: figshare
Year: 2023
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1. Table S1: Markers and primers used for gene mapping and sequencing.
Kondo Effect of a Vibrating Magnetic Impurity
Creators: name: Yashiki, Satoshi
name: Kirino, Shunsuke
name: Ueda, Kazuo
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: A generalized Anderson model for a magnetic ion in a harmonic potential is formulated. The model is investigated by the numerical renormalization group(NRG) method. In addition to the conventional s-wave screening, the model exhibits phonon assisted p-wave Kondo effect as well as Yu and Anderson type Kondo effect. It is shown that the s-wave Kondo and the Yu-Anderson Kondo belong to the same fixed point. At the boundary between the s-wave and p-wave Kondo regions line of fixed points of the two channel Kondo effect is identified.
description: 5pages, 6figures, J. Phys. Soc. Jpn. 79 (2010) No.9 to be published
Confining vs. conformal scenario for SU(2) with adjoint fermions. Gluonic observables
Creators: name: Del Debbio, Luigi
name: Lucini, Biagio
name: Patella, Agostino
name: Pica, Claudio
name: Rago, Antonio
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Walking technicolor is a mechanism for electroweak symmetry breaking without Higgs field. The Higgs mechanism is provided by chiral symmetry breaking in the technicolor theory. An essential ingredient is the vicinity to an IR fixed point, which could reconcile technicolor with the electroweak precision tests. SU(2) gauge theory with two Dirac adjoint fermions has been proposed as a candidate for walking technicolor. Understanding whether this theory is confining or IR-conformal is a challenging problem, which can be addressed by means of numerical simulations. We have pointed out that a clean signal for the existence of an IR fixed point in this theory can be obtained by comparing the mesonic and gluonic sectors. We review some technical details of our calculations. Possible systematic errors are discussed.
description: 7 pages, 4 PDF figures + PoS logo, Lattice 2010
Pressure and temperature dependence of the longitudinal proton relaxation times in supercooled water to -87°C and 2500 bar
Creators: name: Lang, Elmar
name: Lüdemann, Hans-Dietrich
Publisher: name: Universität Regensburg
Year: 1977
Subjects: subject: MOLECULAR MOTION, HYDROGEN BONDS, REORIENTATION, QUADRUPOLE INTERACTIONS, SUPERCOOLED LIQUIDS, LIQUIDS, WATER, SPIN−LATTICE RELAXATION, OXYGEN 17, HIGH PRESSURE, ISOTOPE EFFECTS, LATTICE VIBRATIONS, RELAXATION TIME, METASTABLE STATES, NMR SPECTRA
subject: 570 Biowissenschaften, Biologie
subject: 76.60.Es
subject: 07.35.+k

description: The longitudinal proton relaxation times T1 of the water protons have been determined at 100.1 MHz in the temperature range from +20 to −87 °C and up to pressures of 2500 bar. At temperatures below +10 °C, the T1 isotherms exhibit a maximum at pressures between 1.5 and 2 kbar. While at +10 and 0 °C, T1 rises by ∼10% from its atmospheric pressure value, this maximum becomes much more pronounced between −20 and −45 °C. In this region application of pressure increases T1 by ∼100%. The isobars at 2 kbar and above run through a minimum at −76 °C, indicating that at this temperature ωτϑ?1 and that the proton relaxation rate cannot be described by the extreme narrowing condition below ∼−40 °C. The experimental T1 data and the τϑ values derived at 2 kbar could be treated by a sum of two exponentials. While the smaller activation energies derived from this fit of 3.44±0.17 kcal mole−1 is independent of pressure, the higher activation energy decreases from 13±0.65 kcal mole−1 at atmospheric pressure to 9.3±0.5 kcal mole−1 around 1 kbar and then remains independent of pressure to 2.5 kbar. The data are qualitatively discussed in terms of a random hydrogen‐bond network.
A Planet of an A-Star: HD15082b
Creators: name: Guenther, E. W.
name: Cameron, A. C.
name: Smalley, B.
name: Rodler, F.
name: Rebolo, R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Most of the known transiting extrasolar planets orbit slowly rotating F, G or K stars. In here we report on the detection of a transiting planet orbiting the bright, rapidly rotating A5 star HD15082 (WASP-33b, V=8.3, m sin i = 86 km s-1), recently made by SuperWASP. Time resolved spectroscopic observations taken during transit show a hump caused by the planet crossing the line profile. From the analysis of the spectra, we derive the radius of the planet and find that it is orbiting retrograde in respect to the spin of the star. Because of its small distance from an A5 star (the orbital period of only 1.22 days), the equilibrium temperature of the planet is estimated to be 2700 K. The planet thus is one of the hottest planets known, which makes it relatively easy to detect it in the IR. We thus tried to detect it using the TNG but did not succeed.
description: Part of PlanetsbeyondMS/2010 proceedings http://arxiv.org/html/1011.6606
Self consistent GW determination of the interaction strength: application to the iron arsenide superconductors
Creators: name: Kutepov, A.
name: Haule, K.
name: Savrasov, S. Y.
name: Kotliar, G.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We introduce a first principles approach to determine the strength of the electronic correlations based on the fully self consistent GW approximation. The approach provides a seamless interface with dynamical mean field theory, and gives good results for well studied correlated materials such as NiO. Applied to the recently discovered iron arsenide materials, it accounts for the noticeable correlation features observed in optics and photoemission while explaining the absence of visible satellites in X-ray absorption experiments and other high energy spectroscopies.
description: 3 figs, 4 pages
Nuclear magnetic resonance studies of supercooled aqueous electrolyte solutions
Creators: name: Lang, Elmar
name: Bradl, S.
name: Fink, W.
name: Radkowitsch, H.
name: Girlich, D.
Publisher: name: Universität Regensburg
Year: 1990
Subjects: subject: 570 Biowissenschaften, Biologie
subject: 76.60.Es Relaxation effects
subject: 64.70.P- Glass transitions of specific systems
subject: 66.30.H- Self-diffusion and ionic conduction in nonmetals
subject: 64.60.A- Specific approaches applied to studies of phase transitions
subject: 64.60.My Metastable phases

description: The dynamic properties of water molecules coordinated to simple ions (alkali and alkali-earth halides) and hydrophobic ions (tetraalkylammonium (TAA) halides) in supercooled solutions have been investigated with NMR. The study of spin-lattice relaxation rates and self-diffusion coefficients as functions of temperature, pressure Larmor frequency and concentration reveals characteristic features of molecular motions close to the low-temperature limit of the metastable phase (percolation transition and glass transition) and provides certain details of the local arrangement of water molecules in the coordination sphere of these ions. The intramolecular flexibility of the alkyl chains of the hydrated TAA cations has been investigated also. The dynamics of the methyl group reorientation provide a sensitive probe of structural differences in these solutions.
Pressure and temperature dependence of the longitudinal proton and deuteron relaxation rates in liquid H₂S and D₂S
Creators: name: Hauer, J.
name: Lang, Elmar
name: Lüdemann, Hans-Dietrich
Publisher: name: Universität Regensburg
Year: 1981
Subjects: subject: 570 Biowissenschaften, Biologie
subject: 76.60.Es Relaxation effects
subject: 07.35.+k High-pressure apparatus; shock tubes; diamond anvil cells

description: The pressure and temperature dependence of the spin-lattice relaxation time T1 for the protons in liquid H2S and the deuterons in liquid D2S have been measured between the melting-pressure-curve and 395 K at pressures up to 200 MPa. The different contributions to the experimental relaxation rate T1−1 could be separated with the extended J-diffusion model. The results are compared with analogous measurements made previously in liquid water and liquid ammonia in order to get some insight into the influence of hydrogen bonding interactions upon molecular motions in these liquids. From the pressure dependence of the isotherms an activation volume of Δ V‡ = 2 ± 0.5 [cm3/mol] is derived for the rotational motion of the H2S molecule, while the translational motion is characterized by a higher Δ V‡ = 7 ± 1 [cm3/mol].
The nature of nuclear Halpha emission in LINERs
Creators: name: Masegosa, J.
name: Márquez, I.
name: Ramirez, A.
name: González-Martín, O.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: To get insight in the nature of the ionized gas in the nuclear region of LINERs we have performed a study of HST Halpha imaging of 32 LINERs. The main conclusion from this analysis is that for the large majority of LINERs (84%) an unresolved nuclear source has been identified as well as extended emission with equivalent sizes ranging from few tens till about hundredths of parsecs. Their morphologies appear not to be homogeneous being basically grouped into three classes:nuclear outflow candidates (42%), core-halo morphologies (25%) and nuclear spiral disks (14%). Clumpy structures reminiscent of young stellar clusters are not a common property on LINERs. The remaining 5 galaxies are too dusty to allow a clear view of the ionized gas distribution. A size-luminosity relation has been found between the equivalent radius of the Halpha emission and the (2-10 keV) X-ray luminosities. Both ionised gas morphologies and the size-luminosity relation are indistinguishable from those of low luminosity Seyferts, suggesting the same origin for the NLR of LINERs and Seyferts. Also a relation between soft X-rays and ionized gas has been suggested for the first time in LINERs. From multiwavelength data, only 4 out of the 32 LINERs have no evidences on an AGN nature of theirnuclear sources from multiwavelength data, but extremely obscured AGNs cannot be discarded out given the Compton thick signatures of their X-ray emission. For the confirmed AGN LINERs, their Halpha imaging favour core-halo and outflow morphologies (65% of the cases). Finally, their calculated Eddington ratios show that our LINER sources radiate at sub-Eddington regime, with core-halo systems having on average larger Eddington ratios than outflow candidates.
description: Accepted for publication in Astronomy and Astrophysics
Planets around Extreme Horizontal Branch Stars
Creators: name: Bear, E.
name: Soker, N.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We review three main results of our recent study: We show that a proper treatment of the tidal interaction prior to the onset of the common envelope (CE) leads to an enhance mass loss. This might increase the survivability of planets and brown dwarfs that enter a CE phase. From the distribution of planets around main sequence stars, we conclude that around many sdB/sdO stars more than one planet might be present. One of these might have a close orbit and the others at about orbital periods of years or more. We show that the intense ionizing flux of the extreme horizontal branch star might evaporate large quantities of a very close surviving substellar object. Balmer emission lines from the evaporated gas can be detected via their Doppler shifts.
description: Part of PlanetsbeyondMS/2010 proceedings http://arxiv.org/html/1011.6606
Entanglement Witnesses and Characterizing Entanglement Properties of Some PPT States
Creators: name: Jafarizadeh, M. A.
name: Behzadi, N.
name: Akbari, Y.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: On the basis of linear programming, new sets of entanglement witnesses (EWs) for 3x3 and 4x4 systems are constructed. In both cases, the constructed EWs correspond to the hyperplanes contacting, without intersecting, the related feasible regions at line segments and restricted planes respectively. Due to the special property of the contacting area between the hyper-planes and the feasible regions, the corresponding hyper-planes can be turned around the contacting area throughout a bounded interval and hence create an infinite number of EWs. As these EWs are able to detect entanglement of some PPT states, they are non-decomposable (nd-EWs).
description: 11 pages
Anomalien des flüssigen Wassers
Creators: name: Lang, Elmar
name: Lüdemann, Hans-Dietrich
Publisher: name: Universität Regensburg
Year: 1982
Subjects: subject: 570 Biowissenschaften, Biologie

description: Bei tiefen Temperaturen (T < 300 K) zeigt flüssiges Wasser viele ungewöhnliche physikalisch-chemische Eigenschaften, die durch die starke Direktivität der Wasserstoffbrückenbindung und die damit verbundene energetische Bevorzugung einer tetraedrischen Nahordnung mit schlechter Raumausfüllung verursacht werden. Diese Anomalien werden im metastabilen Bereich unterhalb der Schmelzdruckkurve wesentlich ausgeprägter. Im vorliegenden Beitrag werden die Experimentalbefunde anhand der neueren Theorien diskutiert und mit den Ergebnissen von Computer-Simulationen am kalten Wasser verglichen. Die Anomalien des Wassers, die sich z. B. im Dichtemaximum der flüssigen Phase oder in der Abnahme der Viskosität mit dem Druck manifestieren, sind auf den Bereich T < 300 K und p ≲ 200 MPa beschränkt. Bei diesen Drücken zeigt das unterkühlte Wasser mit fallender Temperatur ein ungewöhnliches Verhalten: Alle isobaren Eigenschaften deuten auf einen Phasenübergang bei T ≈ (TK − 50 K), dessen physikalische Natur noch nicht eindeutig beschrieben werden kann. Dieses Phänomen ist bis jetzt ausschließlich im flüssigen Wasser beobachtet worden. – Künftig wird man unterkühlte wäßrige Lösungen für kinetische Untersuchungen verwenden und dadurch den zugänglichen dynamischen Bereich der Untersuchung wäßriger Lösungen erheblich erweitern können.
Effects of strain on the electronic structure of VO_2
Creators: name: Lazarovits, Bence
name: Kim, Kyoo
name: Haule, Kristjan
name: Kotliar, Gabriel
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present cluster-DMFT (CTQMC) calculations based on a downfolded tight-binding model in order to study the electronic structure of vanadium dioxide (VO_2) both in the low-temperature (M_1) and high-temperature (rutile) phases. Motivated by the recent efforts directed towards tuning the physical properties of VO_2 by depositing films on different supporting surfaces of different orientations we performed calculations for different geometries for both phases. In order to investigate the effects of the different growing geometries we applied both contraction and expansion for the lattice parameter along the rutile c-axis in the 3-dimensional translationally invariant systems miming the real situation. Our main focus is to identify the mechanisms governing the formation of the gap characterizing the M_1 phase and its dependence on strain. We found that the increase of the band-width with compression along the axis corresponding to the rutile c-axis is more important than the Peierls bonding-antibonding splitting.
Diffusion in simple fluids
Creators: name: Speedy, R. J.
name: Prielmeier, F. X.
name: Vardag, T.
name: Lang, Elmar
name: Lüdemann, Hans-Dietrich
Publisher: name: Universität Regensburg
Year: 1989
Subjects: subject: 570 Biowissenschaften, Biologie

description: Computed self diffusion coefficients for the Lennard-Jones and hard sphere fluids are related by Dej = DNs(aB) exp (--e/2kB T) where σB=σLJ(2/[1+ii(1+2kBT/ε)])1/6, the effective hard sphere diameter, is the (average) distance of closest approach in collisions between molecules which interact with the positive part of the LJ potential, and the Arrhenius term reflects the influence of the negative part. σLJ and ε are the size and well depth parameters. Measured diffusion coefficients of the halomethane liquids are reproduced by the equation over wide ranges of temperature and density and do not reveal any influence of the inelastic effects associated with molecular anisotropy.
Website von: Wissensportal der ETH-Bibliothek / ETH Library's Knowledge Portal mit der Original-URL https://www.library.ethz.ch
Creators: name: ETH Zürich, Informatikdienste
Publisher: name: ETH-Bibliothek, Hochschularchiv der ETH Zürich
Year: 2018
Subjects: Spiegelung der Website, geharvestet mit dem Crawler Heritrix. Beim Aufrufen der Website kann eine Fehlermeldung betreffend Silbentrennung (hyphenator.js) erscheinen; der Fehler hat keine Auswirkung auf Inhalt oder Darstellung der Website. Webarchivierung unvollständig, u.a. Werden Bilder nicht angezeigt.

description: deutsch und englisch
title: Beeinträchtigungen der handmotorischen Funktionen bei Schülerinnen und Schülern mit einer Cerebralparese im Fach Mathematik – Kriterienkatalog für den Umgang mit Arbeitsmitteln im Erstrechenunterricht
title: Impairments of hand motor functions of students with cerebral palsy in the subject of mathematics – Criteria catalog for the use of working materials in first calculation lessons
Creators: name: Sigmund, Annika
Publisher: name: Universität Würzburg
Year: 2022
Subjects: subject: 371 Schulen, schulische Tätigkeiten; Sonderpädagogik

description: LFS online; 3
Monte Carlo methods for pricing and hedging American options
Creators: name: Milstein, Grigori N.
name: Reiß, Oliver
name: Schoenmakers, John G. M.
Publisher: name: Weierstrass Institute
Year: 2003
Subjects: subject: Pricing and hedging of American options
subject: Monte Carlo simulation
subject: Determination of the exercise boundary
subject: 60H30
subject: 65C30
subject: 91B28

description: We introduce a new Monte Carlo method for constructing the exercise boundary of an American option in a generalized Black-Scholes framework. Based on a known exercise boundary, it is shown how to price and hedge the American option by Monte Carlo simulation of suitable probabilistic representations in connection with the respective parabolic boundary value problem. The methods presented are supported by numerical simulation experiments.