cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Non-equilibrium Enhancement of Cooper Pairing in Cold Fermion Systems
Creators: name: Robertson, Andrew
name: Galitski, Victor
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Non-equilibrium stimulation of superfluidity in trapped Fermi gases is discussed by analogy to the work of Eliashberg [G. M. Eliashberg, in "Nonequilibrium Superconductivity," edited by D. N. Langenberg and A. I. Larkin (North-Holland, New York, 1986)] on the microwave enhancement of superconductivity. Optical excitation of the fermions balanced by heat loss due to thermal contact with a boson bath and/or evaporative cooling enables stationary non-equilibrium states to exist. Such a state manifests as a shift of the quasiparticle spectrum to higher energies and this effect effectively raises the pairing transition temperature. As an illustration, we calculate the effective enhancement of Cooper pairing and superfluidity in both the normal and superfluid phases for a mixture of Rb and Li in the limit of small departure from equilibrium. It is argued that in experiment the desirable effect is not limited to such small perturbations and the effective enhancement of the pairing temperature may be quite large.
description: 7 pages, 6 figures
title: Scaffolding for chemistry students – which tools are assessed as being more helpful
title: Stepped supporting tools or task navigators?
titleType: Subtitle
Creators: name: Hermanns, Jolanda
Publisher: name: Universität Potsdam
Year: 2021

description: In this paper the use of two different scaffolds in a seminar on the topic of heterocycles is discussed. The students first used both scaffolds (stepped supporting tools and a task navigator) on two tasks and could then choose for one other task the scaffold that suited them more. The scaffolds were evaluated in a mixedmethods study by the use of questionnaires and the conducting of a focus group interview. Both scaffolds were assessed as being helpful. However, students who thought they didn’t need different sorts of tips, as provided by the task navigator, chose the stepped supporting tools. All students reflected on their use of the scaffolds; their choices for one of both are therefore well-founded. As the reasons for choosing the scaffold are very individual, in future seminars both types of scaffolds will be provided.
description: Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe; 1108
Consecutive extreme flooding and heat wave in Japan: Are they becoming a norm?
Creators: name: Wang, Simon S.-Y.
name: Kim, Hyungjun
name: Coumou, Dim
name: Yoon, Jin-Ho
name: Zhao, Lin
name: Gillies, Robert R.
Publisher: name: Hoboken, NJ : Wiley
Year: 2019
Subjects: subject: extreme events
subject: climate change
subject: subtropical anticyclone
subject: deepened synoptic trough
subject: 550

description: [No abstract available]
Noise-Resilient Group Testing: Limitations and Constructions
Creators: name: Cheraghchi, Mahdi
Publisher: name: arXiv
Year: 2008
Subjects: subject: Discrete Mathematics (cs.DM)
subject: Information Theory (cs.IT)
subject: Combinatorics (math.CO)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: We study combinatorial group testing schemes for learning $d$-sparse Boolean vectors using highly unreliable disjunctive measurements. We consider an adversarial noise model that only limits the number of false observations, and show that any noise-resilient scheme in this model can only approximately reconstruct the sparse vector. On the positive side, we take this barrier to our advantage and show that approximate reconstruction (within a satisfactory degree of approximation) allows us to break the information theoretic lower bound of $\tildeΩ(d^2 \log n)$ that is known for exact reconstruction of $d$-sparse vectors of length $n$ via non-adaptive measurements, by a multiplicative factor $\tildeΩ(d)$. Specifically, we give simple randomized constructions of non-adaptive measurement schemes, with $m=O(d \log n)$ measurements, that allow efficient reconstruction of $d$-sparse vectors up to $O(d)$ false positives even in the presence of $δm$ false positives and $O(m/d)$ false negatives within the measurement outcomes, for any constant $δ< 1$. We show that, information theoretically, none of these parameters can be substantially improved without dramatically affecting the others. Furthermore, we obtain several explicit constructions, in particular one matching the randomized trade-off but using $m = O(d^{1+o(1)} \log n)$ measurements. We also obtain explicit constructions that allow fast reconstruction in time $\poly(m)$, which would be sublinear in $n$ for sufficiently sparse vectors. The main tool used in our construction is the list-decoding view of randomness condensers and extractors.
description: Full version. A preliminary summary of this work appears (under the same title) in proceedings of the 17th International Symposium on Fundamentals of Computation Theory (FCT 2009)
Storage of multiple coherent microwave excitations in an electron spin ensemble
Creators: name: Wu, Hua
name: George, Richard E.
name: Ardavan, Arzhang
name: Wesenberg, Janus H.
name: Mølmer, Klaus
name: Schuster, David I.
name: Schoelkopf, Robert J.
name: Itoh, Kohei M.
name: Morton, John J. L.
name: Briggs, G. Andrew D.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Electron and nuclear spins have good coherence times and an ensemble of spins is a promising candidate for a quantum memory. By employing holographic techniques via field gradients a single ensemble may be used to store many bits of information. Here we present a coherent memory using a pulsed magnetic field gradient, and demonstrate the storage and retrieval of up to 100 weak 10 GHz coherent excitations in collective states of an electron spin ensemble. We further show that such collective excitations in the electron spin can then be stored in nuclear spin states, which offer coherence times in excess of seconds.
description: Corrected reference and typos
The assessment of omega 3 oil sources for use in aquaculture ‚Äö- alternatives to the unsustainable harvest of wild fish stocks
Creators: name: Miller, MR
Publisher: name: University Of Tasmania
Year: 2023

description: ABSTRACT Worldwide harvest of wild marine fisheries for fish oil cannot increase. However, the demand for fish oil is increasing due to a rapidly expanding aquaculture industry and is further increased by nutraceutical/biomedical and agricultural companies. Aquaculture uses fish oil as a source for essential fatty acids in particular omega-3 long chainpolyunsaturated fatty acids (˜ìv¢3 LC-PUFA) and for energy. Other novel sources of renewable, environmentally sustainable oil that provide these nutritional requirements for Atlantic salmon (Salmo salar L.) are needed. This research looked at alternate sources of oil containing the ˜ìv¢3 LC-PUFA that are associated with the many health benefits of eating Atlantic salmon. This thesis also contributed to the development of three techniques for use in aquaculture lipid nutrition research: 1) advanced chromatography and mass spectroscopy to examine intact molecular membrane lipids; 2) nuclear magnetic resonance (13C NMR) to assess the regiospecific distribution of ˜ìv¢3 LC-PUFA in oil, and 3) molecular RT-PCR to investigate endogenous ˜ìv¢3 LC-PUFA production.
Some aspects of conjugation in Stentor coeruleus
Creators: name: Webb, Terry Lavern
Publisher: name: University of British Columbia
Year: 2011

description: Conjugation in Stentor coeruleua was investigated using two experimental methods which regularly yielded large numbers of mating pairs. One method involves a particular culture technique, the other requires a mixture of cells from different stocks. Mating pairs appeared in the form of bursts of conjugation, either induced by mixing certain stocks or occurring spontaneously in some stock cultures. Spontaneous bursts, in the majority of cases, occurred during a definite interval in the development of a culture. Morphologically distinct pre-conjugator cells appear immediately before as well as during the initial stages of a burst of conjugation. Mating pairs were formed by the union of two pre-conjugators. Mixing eight stocks in all possible combinations of twos and observing their subsequent response revealed they were separable into two complementary mating types. The majority of mating pairs formed in mixtures of stocks consisted of individuals of different mating types. Evidence is presented which is compatible with the hypothesis that cell to cell contacts between individuals of differing mating type are necessary for the initiation of a mating reaction.
Tuning Nanocrystal Surface Depletion by Controlling Dopant Distribution as a Route Toward Enhanced Film Conductivity
Creators: name: Staller, Corey Michael
name: Robinson, Zachary L.
name: Agrawal, Ankit
name: Gibbs, Stephen L.
name: Greenberg, Benjamin L.
name: Lounis, Sebastien D.
name: Kortshagen, Uwe R.
name: Milliron, Delia J.
Publisher: name: The University of Texas at Austin
Year: 2018
Subjects: nanocrystal
dopant

description: Electron conduction through bare metal oxide nanocrystal (NC) films is hindered by surface depletion regions resulting from the presence of surface states. We control the radial dopant distribution in tin-doped indium oxide (ITO) NCs as a means to manipulate the NC depletion width. We find in films of ITO NCs of equal overall dopant concentration that those with dopant-enriched surfaces show decreased depletion width and increased conductivity. Variable temperature conductivity data show electron localization length increases and associated depletion width decreases monotonically with increased density of dopants near the NC surface. We calculate band profiles for NCs of differing radial dopant distributions and in agreement with variable temperature conductivity fits find NCs with dopant-enriched surfaces have narrower depletion widths and longer localization lengths than those with dopant-enriched cores. Following amelioration of NC surface depletion by atomic layer deposition of alumina, all films of equal overall dopant concentration have similar conductivity. Variable temperature conductivity measurements on alumina-capped films indicate all films behave as granular metals. Herein, we conclude that dopant-enriched surfaces decrease the near-surface depletion region, which directly increases the electron localization length and conductivity of NC films.
The reproductive biology and movement patterns of the draughtboard shark, (Cephaloscyllium laticeps): implications for bycatch management
Creators: name: Awruch, CA
Publisher: name: University Of Tasmania
Year: 2023

description: The draughtboard shark (Cephaloscyllium laticeps) is the most common shark on temperate reefs in southeastern Australia. In order to implement adequate management plans its reproductive biology and movement patterns were studied. Females developed a single external-type ovary with a maximum follicle diameter of 35 mm. Vitellogenesis commenced at 10 mm follicle diameter. The male reproductive tract consisted of paired testis with spermatocysts undergoing diametric development. The hormones testosterone, 17-˜í‚â§ estradiol, progesterone and 11-ketotestosterone (males only) were examined to determine their role in reproduction. Testosterone and estradiol showed major changes during follicle development. Estradiol increased as the follicle developed before declining as the follicle reached maturity. Testosterone remained low during the first stages of follicular development and increased as the follicle reached maturity. Progesterone showed a peak just prior to ovulation. Testosterone was the only hormone that varied with maturity in males and no levels of 11-ketotestosteorne were detected. Females were able to store sperm for at least 15 months and eggs were laid in pairs at monthly intervals. Juveniles hatched after 12 months. The size at maturity and seasonality of reproduction were estimated using reproductive parameters obtained from dissected animals and from steroid hormones. The sizes at onset of sexual maturity by both methods were similar. Females laid eggs throughout the year with a peak in deposition between January and June. Elevated values of testosterone and progesterone coincide with this period of egg deposition. Males showed no seasonal pattern in reproduction although both testosterone and the amount of sperm in the seminal vesicle were marginally higher in the first semester of the year. Movement studies were undertaken using conventional and acoustic tagging. The area of study included a marine reserve and the adjacent bays of southeast Tasmania. Both methods demonstrate that the majority of sharks remained in the same region in which they were tagged, although a few sharks moved large distances. Sharks were active throughout the day and night with peak activity during dawn and dusk. This species could remain stationary on the bottom for periods up to five days. No correlation was found between activity and lunar patterns and both sexes showed similar activity patterns This study has provided the first information on reproduction and movement of draughtboard shark and demonstrated the potential for hormones to provide reproductive information necessary for management without the need to sacrifice the shark.
Interacting model of new agegraphic dark energy: Cosmological evolution and statefinder diagnostic
Creators: name: Zhang, Li
name: Cui, Jinglei
name: Zhang, Jingfei
name: Zhang, Xin
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The statefinder diagnosic is a useful method for distinguishing different dark energy models. In this paper, we investigate the new agegraphic dark energy model with interaction between dark energy and matter component by using statefinder parameter pair $\{r, s\}$ and study its cosmological evolution. We plot the trajectories of the new agegraphic dark energy model for different interaction cases in the statefinder plane. As a result, the influence of the interaction on the evolution of the universe is shown in the statefinder diagrams.
description: 15 pages, 4 figures
Microbial reduction of metal-organic frameworks enables synergistic chromium removal
Creators: name: Springthorpe, Sarah Katherine
name: Dundas, Christopher M.
Publisher: name: Nature Communications
Year: 2019
Subjects: Redox

description: Redox interactions between electroactive bacteria and inorganic materials underpin many emerging technologies, but commonly used materials (e.g., metal oxides) suffer from limited tunability and can be challenging to characterize. In contrast, metal-organic frameworks exhibit well-defined structures, large surface areas, and extensive chemical tunability, but their utility as microbial substrates has not been examined. Here, we report that metal-organic frameworks can support the growth of the metal-respiring bacterium Shewanella oneidensis, specifically through the reduction of Fe(III). In a practical application, we show that cultures containing S. oneidensis and reduced metal-organic frameworks can remediate lethal concentrations of Cr(VI) over multiple cycles, and that pollutant removal exceeds the performance of either component in isolation or bio-reduced iron oxides. Our results demonstrate that frameworks can serve as growth substrates and suggest that they may offer an alternative to metal oxides in applications seeking to combine the advantages of bacterial metabolism and synthetic materials.
Accounting for risk of non linear portfolios: a novel Fourier approach
Creators: name: Bormetti, Giacomo
name: Cazzola, Valentina
name: Delpini, Danilo
name: Livan, Giacomo
Publisher: name: arXiv
Year: 2010
Subjects: subject: Risk Management (q-fin.RM)
subject: Portfolio Management (q-fin.PM)
subject: FOS: Economics and business

description: The presence of non linear instruments is responsible for the emergence of non Gaussian features in the price changes distribution of realistic portfolios, even for Normally distributed risk factors. This is especially true for the benchmark Delta Gamma Normal model, which in general exhibits exponentially damped power law tails. We show how the knowledge of the model characteristic function leads to Fourier representations for two standard risk measures, the Value at Risk and the Expected Shortfall, and for their sensitivities with respect to the model parameters. We detail the numerical implementation of our formulae and we emphasizes the reliability and efficiency of our results in comparison with Monte Carlo simulation.
description: 10 pages, 12 figures. Final version accepted for publication on Eur. Phys. J. B
Testing bias adjustment methods for regional climate change applications under observational uncertainty and resolution mismatch
Creators: name: Casanueva, Ana
name: Herrera, Sixto
name: Iturbide, Maialen
name: Lange, Stefan
name: Jury, Martin
name: Dosio, Alessandro
name: Maraun, Douglas
name: Gutiérrez, José M.
Publisher: name: Hoboken, NJ : Wiley
Year: 2020
Subjects: subject: bias adjustment
subject: climate change signal
subject: downscaling
subject: observational uncertainty
subject: 550

description: Systematic biases in climate models hamper their direct use in impact studies and, as a consequence, many statistical bias adjustment methods have been developed to calibrate model outputs against observations. The application of these methods in a climate change context is problematic since there is no clear understanding on how these methods may affect key magnitudes, for example, the climate change signal or trend, under different sources of uncertainty. Two relevant sources of uncertainty, often overlooked, are the sensitivity to the observational reference used to calibrate the method and the effect of the resolution mismatch between model and observations (downscaling effect). In the present work, we assess the impact of these factors on the climate change signal of temperature and precipitation considering marginal, temporal and extreme aspects. We use eight standard and state-of-the-art bias adjustment methods (spanning a variety of methods regarding their nature—empirical or parametric—, fitted parameters and trend-preservation) for a case study in the Iberian Peninsula. The quantile trend-preserving methods (namely quantile delta mapping (QDM), scaled distribution mapping (SDM) and the method from the third phase of ISIMIP-ISIMIP3) preserve better the raw signals for the different indices and variables considered (not all preserved by construction). However, they rely largely on the reference dataset used for calibration, thus presenting a larger sensitivity to the observations, especially for precipitation intensity, spells and extreme indices. Thus, high-quality observational datasets are essential for comprehensive analyses in larger (continental) domains. Similar conclusions hold for experiments carried out at high (approximately 20 km) and low (approximately 120 km) spatial resolutions. © 2020 The Authors. Atmospheric Science Letters published by John Wiley & Sons Ltd on behalf of the Royal Meteorological Society.
Allelic frequency and genotype distributions of angiotensin converting enzyme gene among three essential Iraqi ethnic group population
Creators: name: Al-Awadi, Salwa J.
Publisher: name: Faculty of Pharmaceutical Sciences KKU MSU UBU
Year: 2012
Subjects: ACE (angiotensin-converting enzyme), ACE polymorphism. Iraqi Ethnics group

description: Isan Journal ofPharmaceutical Sciences, 8, 1, 27-33
Critical Formation of Trapped Surfaces in the Collision of Non-expanding Gravitational Shock Waves in de Sitter Space-Time
Creators: name: Aref'eva, I. Ya.
name: Bagrov, A. A.
name: Guseva, E. A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the formation of marginally trapped surfaces in the head-on collision of two shock waves in de Sitter space-time as a function of the cosmological constant and the shock wave energy. We search for a marginally trapped surface on the past light cone of the collision plane. For space-time dimension $D\geq3$ there exists a critical value of the shock wave energy above which there is no trapped surface of this type. For $D>3$ the critical value of the shock wave energy depends on the de Sitter radius, and there is no this type trapped surface formation for a large cosmological constant. For D=3, the critical value of the shock wave energy is independent of the cosmological constant. At the critical point the trapped surface is finite. Below the critical energy value, the area of trapped surface depends on the cosmological constant and the shock wave energy.
description: Latex, 26 pages, 4 figures, several typos corrected
Study of estrogenic effect on estrogen-dependent tissues of phytoestrogen extraction of Thai medicinal plants in Ubon Ratchatani province
Creators: name: Jaruwan Wongbutdee
Publisher: name: Faculty of Pharmaceutical Sciences KKU MSU UBU
Year: 2012
Subjects: phytoestrogen, estrogenic effect, estrogen-dependent tissues, uterine wet weight, herbal

description: Isan Journal ofPharmaceutical Sciences, 8, 1, 34-39
D.E.P. bulletin 1983 January - June
Creators: name: No Name Supplied
Publisher: name: No Publisher Supplied
Year: 1983

description: The DEP bulletin is a semi-monthly publication of the New Jersey Department of Environmental Protection. It contains a list of construction permit applications recently filed or acted upon by the Department along with a calendar of events of interest, a schedule of public hearings, and Environmental Impact Statements acted upon during the period.
Pharmaceutical Uses of Polyelectrolyte Complexes
Creators: name: Duangkamon Sakloetsakun
Publisher: name: Faculty of Pharmaceutical Sciences KKU MSU UBU
Year: 2012
Subjects: Polyelectrolyte complexes, PE-PE, Characterization, Drug delivery, Cytotoxicity

description: Isan Journal ofPharmaceutical Sciences, 8, 2, 1-11
The experience of knowing : a hermeneutic study of intuitive emergency nursing practice
Creators: name: Lyneham, JI
Publisher: name: University Of Tasmania
Year: 2023

description: This study described the nature and component themes captured within the intuitive practice of emergency nursing; it also explicates the nature of expert practice as define by Patricia Benner in 1984. The history of intuitive practice or as noted in this study the experience of knowing has to this point only been anecdotal. The experience of knowing needed to either be validated or refuted so that its place in emergency nursing could be found. The study was informed by the philosophy and method of phenomenology. The participants in the study were fourteen experienced emergency nurses with between 4.5 ‚Äö- 23 emergency nursing years. These participants through their stories and experiences of emergency practice expressed their experience of knowing. Through a van Manen process and Gadamerian analysis six themes associated with the ways in which my participants experienced knowing, were identified. These were named, knowledge, experience, connection, feeling, syncretism and trust. Further analysis uncovered a developmental relationship between the themes in general and with each other. Culminating in the reconstruction of Benner's expert stage into three distinct phases, Cognitive intuition, transitional intuition and embodied intuition. To enable the full expression of these findings a mathematical theory has been put forward.
On Ramification Filtrations and p-adic Differential Equations, II: mixed characteristic case
Creators: name: Xiao, Liang
Publisher: name: arXiv
Year: 2008
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11S15

description: Let K be a complete discretely valued field of mixed characteristic (0, p) with possibly imperfect residue field. We prove a Hasse-Arf theorem for the arithmetic ramification filtrations on G_K, except possibly in the absolutely unramified and non-logarithmic case, or p=2 and logarithmic case. As an application, we obtain a Hasse-Arf theorem for filtrations on finite flat group schemes over O_K.
Tachyons and $i$ions in Theoretical Particle Physics
Creators: name: Riley, Spencer
Publisher: name: figshare
Year: 2017
Subjects: subject: Quantum Mechanics
subject: 20203 Particle Physics
subject: FOS: Physical sciences

description: Super-luminous particles, such as the Tachyon, should be seen as a possibility for further advancement of our understanding of how the universe or even the Multiverse functions. Due to the particle's imaginary mass and the lack of detection, Tachyons have been identified as a ‘hypothetical’ or ‘exotic’ particle. This classification is not based upon their Quantum Spin. This new class of particle, “imaginary ions” or “iions”, consists of all particles associated with a imaginary Quantum Spin, such as the Tachyon and its corresponding anti-particle. This document will discuss and break down the classification of Tachyons as well as the numerous components of these magnificent particles while also traveling down into the rabbit hole of the quantum mechanical universe to the exotic branches of the physical realm.
Three-body forces and the limit of oxygen isotopes
Creators: name: Otsuka, Takaharu
name: Suzuki, Toshio
name: Holt, Jason D.
name: Schwenk, Achim
name: Akaishi, Yoshinori
Publisher: name: arXiv
Year: 2009
Subjects: subject: Nuclear Theory (nucl-th)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The limit of neutron-rich nuclei, the neutron drip-line, evolves regularly from light to medium-mass nuclei except for a striking anomaly in the oxygen isotopes. This anomaly is not reproduced in shell-model calculations derived from microscopic two-nucleon forces. Here, we present the first microscopic explanation of the oxygen anomaly based on three-nucleon forces that have been established in few-body systems. This leads to repulsive contributions to the interactions among excess neutrons that change the location of the neutron drip-line from $^{28}$O to the experimentally observed $^{24}$O. Since the mechanism is robust and general, our findings impact the prediction of the most neutron-rich nuclei and the synthesis of heavy elements in neutron-rich environments.
description: 4 pages, 4 figures, to be published in PRL
Thermal Conductance across Harmonic-Matched Epitaxial Al-Sapphire Heterointerfaces
Creators: name: Matthews, Christopher
name: Lee, Eungkyu
name: Clinton, Evan
name: Ahmad, Habib
name: Shi, Jingjing
name: Yates, Luke
name: Goorsky, Mark
name: Liao, Michael
name: Hopkins, Patrick
name: Hu, Rejiu
name: Li, Ruiyang
name: Graham, Samuel
name: Luo, Tengfei
name: Bai, Tingyu
name: Doolittle, William
name: Koh, Yee Rui
name: Wang, Yekan
name: Engel, Zachary
name: Cheng, Zhe
name: Tian, Zhiting
Publisher: name: University of Notre Dame
Year: 2023

description: A unified fundamental understanding of interfacial thermal transport is missing due to the complicated nature of interfaces which involves complex factors such as interfacial bonding and mixing, surface chemistry, crystal orientation, roughness, and interfacial disorder. This is especially true for metal-nonmetal interfaces which incorporate multiple fundamental heat transport mechanisms such as elastic and inelastic phonon scattering as well as electron-phonon coupling in the metal and across the interface. All these factors jointly affect thermal boundary conductance (TBC). Therefore, the experimentally measured interfaces may not be the same as the ideally modelled, thus obfuscating conclusions drawn from previous experimental and modeling comparisons. This work provides a systematic study of interfacial thermal conductance across well-controlled and ultraclean epitaxial (111) Al || (0001) sapphire interfaces, known as harmonic-matched interface. The measured high TBC is compared with theoretical models of atomistic Green’s function (AGF) and the non-equilibrium Landauer approach, showing that elastic phonon transport dominates the interfacial thermal transport of the Al-sapphire interfaces. By scaling the TBC with the Al heat capacity and sapphire heat capacity with phonon frequency lower than the max Al phonon frequency, a nearly constant transmission coefficient is observed, indicating that the phonons on the Al side limits the Al-sapphire TBC. This confirms that elastic phonon transport dominates interfacial thermal transport of the Al-sapphire interfaces and other mechanisms play negligible roles. Our work enables a quantitative study of TBC to validate theoretical models of thermal transport mechanisms across metal-nonmetal interfaces, and acts as a benchmark when studying how other factors impact TBC. KEYWORDS: Thermal boundary conductan.
$|V_{ub}|$ and $B\toη^{(')}$ Form Factors in Covariant Light Front Approach
Creators: name: Chen, Chuan-Hung
name: Shen, Yue-Long
name: Wang, Wei
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: $B\to (π, η, η')$ transition form factors are investigated in the covariant light-front approach. With theoretical uncertainties, we find that $B\to (π, η, η')$ form factors at $q^2=0$ are $f^{(π, η, η')}_{+}(0)=(0.245^{+0.000}_{-0.001}\pm 0.011, 0.220 \pm 0.009\pm0.009, 0.180\pm 0.008^{+0.008}_{-0.007})$ for vector current and $f^{(π, η, η')}_{T}(0)=(0.239^{+0.002+0.020}_{-0.003-0.018}, 0.211\pm 0.009^{+0.017}_{-0.015}, 0.173\pm 0.007^{+0.014}_{-0.013})$ for tensor current, respectively. With the obtained $q^2$-dependent $f^π_{+}(q^2)$ and observed branching ratio (BR) for $\bar B_d\to π^+ \ell \bar ν_{\ell}$, the $V_{ub}$ is found as $|V_{ub}|_{LF}= (3.99 \pm 0.13)\times 10^{-3}$. As a result, the predicted BRs for $\bar B\to (η, η') \ell \barν_{\ell}$ decays with $\ell=e,μ$ are given by $(0.49^{+0.02+0.10}_{-0.04- 0.07}, 0.24^{+0.01+0.04}_{-0.02-0.03})\times 10^{-4}$, while the BRs for $D^-\to (η,η')\ell\barν_{\ell}$ are $(11.1^{+0.5+0.9}_{-0.6-0.9}, 1.79^{+0.07+0.12}_{-0.08-0.12})\times 10^{-4}$. In addition, we also study the integrated lepton angular asymmetries for $\bar B\to (π,η,η')τ\barν_τ$:$(0.277^{+0.001+0.005}_{-0.001-0.007},0.290^{+0.002+0.003}_{-0.000-0.003},0.312^{+0.004+0.005}_{-0.000-0.006})$.
description: 14 pages, 2 figures, final version to appear in PLB
A reconstruction of global hydroclimate and dynamical variables over the Common Era
Creators: Steiger, Nathan J.
Smerdon, Jason E.
Cook, Edward R.
Publisher: name: Columbia University
Year: 2018
Subjects: Paleoclimatology
Climatic changes
Hydrologic cycle
Hydrologic models

description: Hydroclimate extremes critically affect human and natural systems, but there remain many unanswered questions about their causes and how to interpret their dynamics in the past and in climate change projections. These uncertainties are due, in part, to the lack of long-term, spatially resolved hydroclimate reconstructions and information on the underlying physical drivers for many regions. Here we present the first global reconstructions of hydroclimate and associated climate dynamical variables over the past two thousand years. We use a data assimilation approach tailored to reconstruct hydroclimate that optimally combines 2,978 paleoclimate proxy-data time series with the physical constraints of an atmosphere—ocean climate model. The global reconstructions are annually or seasonally resolved and include two spatiotemporal drought indices, near-surface air temperature, an index of North Atlantic variability, the location of the intertropical convergence zone, and monthly Niño indices. This database, called the Paleo Hydrodynamics Data Assimilation product (PHYDA), will provide a critical new platform for investigating the causes of past climate variability and extremes, while informing interpretations of future hydroclimate projections.
On The Stability Of Non-Supersymmetric AdS Vacua
Creators: name: Narayan, Prithvi
name: Trivedi, Sandip P.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider two infinite families of Non-Supersymmetric $AdS_4$ vacua, called Type 2) and Type 3) vacua, that arise in massive IIA supergravity with flux. We show that both families are perturbatively stable. We then examine non-perturbative decays of these vacua to other supersymmetric and non-supersymmetric $AdS_4$ vacua mediated by instantons in the thin wall approximation. We find that many decays are ruled out since the tension of the interpolating domain wall is too big compared to the energy difference in AdS units. In fact, within our approximations no decays of Type 2) vacua are allowed, although some decays are only marginally forbidden. This can be understood in terms of a "pairing symmetry" in the landscape which relate Type 2) vacua with supersymmetric ones of the same energy.
description: 50 pages, Minor changes in section 2.2.1
A comparative study of breeding ecology and timing in plankton-feeding alcids (Cychlorrhynchus and Aethia spp.) on St. Lawrence Island, Alaska.
Creators: name: Sealy, Spencer George
Publisher: name: University of British Columbia
Year: 2011

description: A comparative study of breeding ecology in Parakeet Auklets (Cychlorrhynchus psittacula (Pallas)), Crested Auklets (Aethia cristatella (Pallas)), and Least Auklets (A. pusilla (Pallas)) was conducted on St. Lawrence Island, Alaska, in 1966 and 1967. Emphasis was placed upon the climatic conditions which prevailed throughout the breeding seasons and their effects on timing of breeding in auklets. The pre-egg stage, egg-laying and incubation, hatching, growth of young, and departure of chicks were studied in both seasons; 1966 was a late year and 1967 was an early year. It was found that (1) Parakeet Auklets appear to have a more extensive migration than Aethia spp. , (2) arrival of adults back on the breeding grounds in spring occurs at approximately mid-May each year, (3) the pre-egg stage is prolonged but the post-breeding dispersal of adults and young from the nesting slope is rapid, (4) breeding does not take place at the same time each year, (5) Cychlorrhynchus breeds a few days later than Aethia spp., (6) a change in diet accompanies the onset of the chick-rearing period in Aethia spp. but not in Cychlorrhynchus, (7) patterns and rates of growth of A. pusilla chicks and possibly chicks of Cychlorrhynchus and A. cristatella differ according to time of hatching, (8) chicks of these auklets are well-adapted to early life, (9) predation upon auklets is low in the Sevuokuk colony, and (10) molt of adults overlaps the breeding effort in Aethia spp. but not in Cychlorrhynchus. Ecological and behavioral specializations in the annual cycles of these auklets revealed close synchronization and shortening of breeding events necessary for breeding in the short Arctic summer. It appears that these auklets are faced with two problems in timing their breeding cycles. Breeding must take place within a period which is largely dictated by climate and they must make best use of the food supply.
Violencia y conflicto como elementos centrales para el deterioro del contexto educativo de la Educación Básica y Media en instituciones educativas públicas
Creators: name: Mosquera Rodas, Jhon  Jairo
Publisher: name: figshare
Year: 2021
Subjects: subject: 220302 Decision Theory
subject: FOS: Philosophy, ethics and religion
subject: Education

description: La investigación tiene como objetivo analizar los factores de violencia y conflicto en las instituciones educativas, para el descubrimiento de los elementos centrales que permiten el deterioro del contexto educativo, centrado en el análisis de las variables violencia y conflicto, empleando el análisis de dichas categorías, además de la aplicación del equilibrio de Nash, definiendo bajo esta teoría el camino idóneo para afrontar las dinámicas que emergen en los contextos educativos afectados por estos fenómenos. El método se ajusta a la investigación cualitativa enfocada a un tipo de estudio descriptivo correlacional, determinando cuáles son los elementos relacionados con el deterioro institucional. Además, se emplea el análisis descriptivo estadístico, junto al perceptrón multicapa como posibilidades de identificación de dichos aspectos, en la búsqueda de soluciones específicas al problema de la violencia y al conflicto en la escuela. En los resultados estadísticos no se muestra la diferencia sobre la percepción que tienen los encuestados sobre las categorías, lo que lleva a señalar que existe un proceso de normalización de los diferentes aspectos de la violencia, tanto en la comunidad, como en las instituciones educativas.
The Empire at war: British and Indian perceptions of empire in the First World War
Creators: name: Davis, AE
Publisher: name: University Of Tasmania
Year: 2023

description: This thesis discusses the relationship between the British and Indian soldiers in World War One. The first two chapters discuss the British officers. Chapter One shows how British commanding officers viewed the Indian soliders. Chapter Two shows how some lower-ranking British officers, due to combat experience and proximity to the Indian soldiers, changed their perceptions of people from India and the British empire. Chapter Three discusses the reaction of the Indian soldiers to combat in the trenches of the Western Front.
A comparison of times series approaches for dendroecological reconstructions of past canopy disturbance events
Creators: Druckenbrod, Daniel L.
Pederson, Neil
Rentch, James
Cook, Edward R.
Publisher: name: Columbia University
Year: 2013
Subjects: subject: Ecology
subject: FOS: Biological sciences
subject: Environmental management
subject: Forests and forestry

description: Time series analysis can identify outliers in tree-ring widths that may not only indicate past disturbances, but may also estimate the subsequent effects of these disturbances on tree growth. Finding a way to isolate these disturbance signals from tree-ring time series could have broad applications in forest ecology and management. Time series outliers may be expressed as pulse, step, or trend interventions, but few dendroecological studies have explored how well these different types of interventions express the response of tree-ring widths to a canopy disturbance resulting in a release event. This study addresses that question by comparing two different time series approaches for detecting release events: a pulse intervention approach and a new combined step and trend (CST) intervention approach. These methods are tested against tree-ring collections with known historical canopy disturbance events: northern red oaks (Quercus rubra) in New York released by the chestnut blight during the early 1920s, eastern hemlocks (Tsuga canadensis) in Pennsylvania released by adjacent selective logging in 1910, and northern red oaks and chestnut oaks (Quercus montana) in West Virginia released through an experimental thinning in 1982. Clusters of CST interventions, but not pulse interventions, were detected for all three collections during and immediately after the known disturbance events, showing that a CST intervention approach consistently reconstructs these release events. In addition, a CST intervention approach isolated canopy disturbance signals from tree-ring widths as disturbance-growth indices. Detrending disturbances from tree-ring widths provides an alternative approach to reconstruct climate in closed-canopy forests; however, just as importantly, disturbance-growth indices created through this method can also reconstruct changes in tree growth rates, biomass, or carbon resulting from a past disturbance event or forest thinning.
Characterizing compact Clifford semigroups that embed into convolution and functor-semigroups
Creators: name: Banakh, Taras
name: Cencelj, Matija
name: Hryniv, Olena
name: Repovš, Dušan
Publisher: name: arXiv
Year: 2008
Subjects: subject: Group Theory (math.GR)
subject: General Topology (math.GN)
subject: FOS: Mathematics
subject: 20M18, 20M30, 22A15, 43A05, 54B20, 54B30

description: We study algebraic and topological properties of the convolution semigroups of probability measures on a topological groups and show that a compact Clifford topological semigroup $S$ embeds into the convolution semigroup $P(G)$ over some topological group $G$ if and only if $S$ embeds into the semigroup $\exp(G)$ of compact subsets of $G$ if and only if $S$ is an inverse semigroup and has zero-dimensional maximal semilattice. We also show that such a Clifford semigroup $S$ embeds into the functor-semigroup $F(G)$ over a suitable compact topological group $G$ for each weakly normal monadic functor $F$ in the category of compacta such that $F(G)$ contains a $G$-invariant element (which is an analogue of the Haar measure on $G$).
School Location: Challenges to Students' Academic Achievement and Baccalaureate Attainment at Various Educational Stages
Creators: name: Dela Cruz, Mary
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 399999
subject: Other education not elsewhere classified

description: The objective of this research study is to determine how the location of a student's school affects their academic performance and the rate of students who complete all 12 basic education programs. The study also looks at how the students' school location affects their attendance at college and degree completion rates while they overcome challenges that they experience inside and outside the school premises.
Connected rectilinear graphs on point sets
Creators: name: Löffler, Maarten
name: Mumford, Elena
Publisher: name: Journal of Computational Geometry
Year: 2011

description: Let V be a set of n points in Rd. We study the question whether there exists an orientation such that V is the vertex set of a connected rectilinear graph in that orientation. A graph is rectilinear if its edges are straight line segments in d pairwise perpendicular directions. We prove that at most one such orientation can be possible, up to trivial rotations of 90 degrees around some axis. In addition, we present an algorithm for computing this orientation (if it exists) in O(nd) time when d≥2.
description: Journal of Computational Geometry, Vol 2, No 1 (2011)
Approximate Euclidean Ramsey theorems
Creators: name: Dumitrescu, Adrian
Publisher: name: Journal of Computational Geometry
Year: 2011

description: According to a classical result of Szemerédi, every dense subset of 1,2,…,N contains an arbitrary long arithmetic progression, if N is large enough. Its analogue in higher dimensions due to Fürstenberg and Katznelson says that every dense subset of {1,2,…,N}d contains an arbitrary large grid, if N is large enough. Here we generalize these results for separated point sets on the line and respectively in the Euclidean space: (i) every dense separated set of points in some interval [0,L] on the line contains an arbitrary long approximate arithmetic progression, if L is large enough. (ii) every dense separated set of points in the d-dimensional cube [0,L]d in Rd contains an arbitrary large approximate grid, if L is large enough. A further generalization for any finite pattern in Rd is also established. The separation condition is shown to be necessary for such results to hold. In the end we show that every sufficiently large point set in Rd contains an arbitrarily large subset of almost collinear points. No separation condition is needed in this case.
description: Journal of Computational Geometry, Vol 2, No 1 (2011)
Multinetwork of international trade: A commodity-specific analysis
Creators: name: Barigozzi, Matteo
name: Fagiolo, Giorgio
name: Garlaschelli, Diego
Publisher: name: arXiv
Year: 2009
Subjects: subject: General Finance (q-fin.GN)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Economics and business
subject: FOS: Physical sciences

description: We study the topological properties of the multinetwork of commodity-specific trade relations among world countries over the 1992-2003 period, comparing them with those of the aggregate-trade network, known in the literature as the international-trade network (ITN). We show that link-weight distributions of commodity-specific networks are extremely heterogeneous and (quasi) log normality of aggregate link-weight distribution is generated as a sheer outcome of aggregation. Commodity-specific networks also display average connectivity, clustering, and centrality levels very different from their aggregate counterpart. We also find that ITN complete connectivity is mainly achieved through the presence of many weak links that keep commodity-specific networks together and that the correlation structure existing between topological statistics within each single network is fairly robust and mimics that of the aggregate network. Finally, we employ cross-commodity correlations between link weights to build hierarchies of commodities. Our results suggest that on the top of a relatively time-invariant ``intrinsic" taxonomy (based on inherent between-commodity similarities), the roles played by different commodities in the ITN have become more and more dissimilar, possibly as the result of an increased trade specialization. Our approach is general and can be used to characterize any multinetwork emerging as a nontrivial aggregation of several interdependent layers.
description: New accepted version
Delaunay triangulation of imprecise points, preprocess and actually get a fast query time
Creators: name: Devillers, Olivier
Publisher: name: Journal of Computational Geometry
Year: 2011

description: We propose a new algorithm to preprocess a set of n disjoint unit disks in O(n log n) expected time, allowing to compute the Delaunay triangulation of a set of n points, one from each disk, in O(n) expected time. Our algorithm has the same asymptotic complexity as previous ones for this problem, but our algorithm is much simpler and it runs faster in practice than a direct computation of the Delaunay triangulation.
description: Journal of Computational Geometry, Vol 2, No 1 (2011)
1738 years of Mongolian temperature variability inferred from a tree-ring width chronology of Siberian pine
Creators: D'Arrigo, Rosanne Dorothy
Frank, David
Jacoby, Gordon
Pederson, Neil
Cook, Edward R.
Buckley, Brendan M.
Nachin, Baatarbileg
Mijiddorj, R.
Dugarjav, Chultamiin
Publisher: name: Columbia University
Year: 2001
Subjects: Climatic changes
Dendrochronology
Paleoclimatology
Meteorology

description: 1738 years (AD 262–1999) of temperature variability are inferred from tree-ring widths of Siberian pine at Solongotyn Davaa (Sol Dav), a timberline (2420 m) site in Mongolia. This chronology can account for 33% of the temperature variance from 1882–1993. The warmest conditions over the past millennium are during the 20th century. The 1999 ring width has the highest index value over the past millennium. Both warmer and colder intervals are inferred during the “Medieval Warm Epoch”. The most severe cold occurred in the 19th century. Unusual cold and frost in AD 536–545 coincide with extremes in other proxies and historical accounts, confirming a widespread, catastrophic event. Trends resemble those of other Eurasian paleoseries, and hemispheric-scale reconstructions over the past millennium. More chronologies such as Sol Dav are essential to improve coverage in the uncertain earlier centuries of these reconstructions and their estimates of natural variability relative to recent anthropogenic change.