cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
VOLUNTARY ACTION OF A FIRM ON ENVIROMENT MANAGEMENT: AN EMPIRICAL ASSESSMENT ON SRI LANKAN FOOD PROCESSING FIRMS’ RESPONSE TO THE PRIVATE AND REGULATORY INCENTIVES
Creators: name: Jayasinghe-Mudalige, Udith K.
name: Udugama, J.M.M.
name: Ikram, S.M.M.
name: Jayasinghe-Mudalige, Udith K.
name: Udugama, J.M.M.
name: Ikram, S.M.M.
Publisher: name: Unknown
Year: 2011
Subjects: subject: Farm Management
subject: Environment management
subject: Food processing sector in Sri Lanka
subject: Incentives
subject: Regulation
subject: Solid waste management
subject: Voluntary adoption

description: The effect of a set of private/market (i.e. financial implications, internal efficiency, market response) and public/non-market (i.e. government regulation, judiciary/legal system) incentives for a firm to act voluntarily on environmental quality is examined. It uses the levels of adoption of five solid waste management practices [SWMPs], namely: (1) 3R system; (2) Composting; (3) Good manufacturing practices; (4) Biogas unit, and (5) ISO 14000 by food processing sector in Sri Lanka in response to the prevalence of each incentive at the firm as the case. The data collected from 325 firms through in-depth interviews and site inspections and supported by a validated structured questionnaire were analyzed using the principles of Structural Equation Modeling. The “Analysis of Moment Structures” (AMOS) software was used to establish the relationships between the levels of adoption of SWMPs and the strength of each incentive. The results show that firms‟ response to environment is relatively low, i.e. 49.2% did not adopt a single practice, while only 28%, 12%, 7.4%, 3.1% and 0.3%, respectively, have adopted 1, 2, 3, 4 or all practices. Firms tend to adopt a higher number of SWMPs as the relative strength of an each incentive perceived by the decision maker of firm gets increases. Firms put a higher weight on the impact on regulation and legal system than the private incentives and the firm size has a substantial impact on its response to the environment. The results highlight the importance of bringing the current public regulatory regimes in developing countries like Sri Lanka towards co-regulation, which is practiced by developed countries like Australia and Canada to facilitate businesses to come up with own solutions for environmental and food quality, as the outcome of this analysis points out that firms‟ compliance to the recommended SWMP was not triggered satisfactorily by the private/voluntary action.
Assessing the potential for beneficial diversification in rain-fed agricultural enterprises
Creators: name: Kandulu, John
name: Kandulu, John
Publisher: name: Unknown
Year: 2011
Subjects: subject: Environmental Economics and Policy
subject: climate variability
subject: yield uncertainty
subject: economic returns
subject: rain-fed agricultural enterprise
subject: risk
subject: Monte Carlo

description: Climate change and climate variability induce uncertainty in yields, and thus threaten long term economic viability of rain-fed agricultural enterprises. Enterprise mix diversification is the most common, and is widely regarded as the most effective, strategy for mitigating multiple sources of farm business risk. We assess the potential for enterprise mix diversification in mitigating climate induced variability in long term net returns from rain-fed agriculture. We build on APSIM modelling and apply Monte Carlo simulation, probability theory, and finance techniques, to assess the potential for enterprise mix diversification to mitigate climate-induced variability in long term economic returns from rain-fed agriculture. We consider four alternative farm enterprise types consisting of three non-diversified farm enterprises and one diversified farm enterprise consisting of a correlated mix of rain-fed agricultural activities. We analyse a decision to switch from a non-diversified agricultural enterprise with the highest expected return to a diversified agricultural enterprise consisting of a mix of agricultural enterprises. Correlation analysis showed that yields were not perfectly correlated (i.e. are less than 1) indicating that changes in climate variables cause non-proportional impacts on yield production. We conclude that at best, diversification can reduce the standard deviation of net returns by up to about A$110 Ha-1, or 52% of mean net returns; increase the probability of below-average net returns by up to about 4% and increase the mean of 10% of worst probable annual net returns by up to A$54/ha. At worst, diversification can reduce the mean of net returns by up to about A$95 Ha-1, or 46%.
The 2.73 Ga I-type granites in the Lengshui Complex and implications for the Neoarchean tectonic evolution of the Yangtze Craton
Creators: name: Huang, Mingda
name: Cui, Xiaozhuang
name: Ren, Guangming
name: Guo, Jinwei
name: Ren, Fei
name: Pang, Weihua
name: Chen, Fenglin
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biochemistry
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Cancer

description: We report the oldest I-type granites in the Lengshui Complex of the Yangtze Craton, providing new insights for its tectonic evolution during the Neoarchean. An approach-combined study of zircon U-Pb dating and Lu-Hf isotopes, as well as whole-rock element geochemistry and Nd isotopes, were employed. LA-ICP-MS zircon U-Pb dating for the monzogranite sample LSG03 and LSG16 yielded ages of 2732 ± 13 Ma and 2738 ± 25 Ma, respectively. The more precise age of 2732 ± 13 Ma for the sample LSG03 was taken as the crystallization age of the monzogranite. These rocks have high SiO2 (73.11–74.01 wt%), K2O (3.93–5.48 wt%), Na2O (3.93–4.86 wt%) and low CaO (0.30–0.69 wt%), MgO (0.17–0.30 wt%), TiO2 (0.14–0.17 wt%), P2O5 (0.01–0.06 wt%), Al2O3 (14.11–14.37 wt%) content with weakly peraluminous affinity (A/CNK = 1.04–1.11). Geochemically, they belong to I-type granites, indicating partial melting of a thickened lower crust. Their relatively high Nb/Ta (15.2–34.8) ratios further suggest they formed under eclogite-facies conditions. The consistent whole-rock Nd and zircon Hf isotopic compositions indicate a homogeneous source. According to their εHf(t) values (−2.0 to 0.8), two-stage Hf model ages (3.1 to 3.2 Ga) and positive εNd(t) (1.4 to 2.1), we argue that they were probably generated by partial melting of a juvenile lower crust with little ancient materials. Monzogranites formed in a late-orogenic or collisional compressive tectonic regime, whereas subsequent ca. 2.73 Ga and 2.67–2.62 Ga A-type granites in the Zhongxiang Uplift (including the Lengshui Complex) may represent a prolonged extensional setting. Thus, Archean subduction (probably unlike modern subduction) likely occurred prior to ca. 2.73 Ga. Similar magmatism in the Kongling Complex implies that the Zhongxiang Uplift may have accrete to the Kongling Complex during the early Neoarchean. The transition from I-type to A-type magmatism may have resulted from a change in the geodynamic regime from the late-orogenic or collisional compressive environment to an extensional environment caused by the subsequent lithospheric collapse and mantle upwelling, suggesting an early Neoarchean orogenic event in the eastern Yangtze Craton.
High mass X-ray binaries in the SMC: the luminosity function
Creators: name: Shtykovskiy, P.
name: Gilfanov, M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study population of compact X-ray sources in the Small Magellanic Cloud using the archival data of XMM-Newton observatory. The total area of the survey is ~1.5 square degrees with the limiting sensitivity of ~10^{-14} erg/s/cm^2, corresponding to the luminosity of ~4.3\cdot 10^{33} erg/s at the SMC distance. Out of ~150 point sources detected in the 2--8 keV energy band, ~3/4 are background CXB sources, observed through the SMC. Based on the properties of the optical and near-infrared counterparts of the detected sources we identified likely HMXB candidates, and sources, whose nature is uncertain, thus, providing a lower and upper limits on the luminosity distribution of HMXBs in the observed part of the SMC. The observed number of HMXBs is consistent with the prediction based on SFR estimates derived from the supernovae frequency and analysis of color-magnitude diagrams of the stellar population. If, on the contrary, the true value of the SFR is better represented by FIR, H_alpha and UV based estimators, then the abundance of HMXBs in the SMC may significantly (by a factor of as much as ~10) exceed the value derived for the Milky Way and other nearby galaxies. The shape of the observed distribution at the bright end is consistent with the universal HMXB XLF. At the faint end, L_X>2* 10^{34} erg/sec, the upper limit on the luminosity function is consistent with while the lower limit is significantly flatter than the L^{-0.6} power law.
description: 13 pages, 9 figures, accepted for publication in MNRAS (minor changes made according to referee comments)
Three-dimensional non-relativistic extended supergravity with cosmological constant
Creators: name: Concha, Patrick
name: Ravera, Lucrezia
name: Rodríguez, Evelyn
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper, we present novel non-relativistic superalgebras which correspond to supersymmetric extensions of the enlarged extended Bargmann algebra. The three-dimensional non-relativistic Chern-Simons supergravity actions invariant under the aforementioned superalgebras are constructed. The new non-relativistic superalgebras allow to accommodate a cosmological constant in a non-relativistic supergravity theory. Interestingly, we show that one of the non-relativistic supergravity theories presented here leads to the recently introduced Maxwellian exotic Bargmann supergravity when the flat limit $\ell \rightarrow\infty$ is considered. Besides, we show that both descriptions can be written in terms of a supersymmetric extension of the Nappi-Witten algebra or the extended Newton-Hooke superalgebra.
description: 34 pages
Bigger is Better: Avoided Deforestation Offsets in the Face of Adverse Selection
Creators: name: Van Benthem, Arthur A.
name: Kerr, Suzi
name: Van Benthem, Arthur A.
name: Kerr, Suzi
Publisher: name: Unknown
Year: 2011
Subjects: Environmental Economics and Policy

description: Voluntary opt-in programs to reduce emissions in unregulated sectors or countries have spurred considerable discussion. Since any regulator will make errors in predicting baselines and participants will self-select into the program, adverse selection will reduce efficiency and possibly environmental integrity. In contrast, pure subsidies lead to full participation but require large financial transfers. We present a simple model to analyze this trade-off between adverse selection and infra-marginal transfers. We find that increasing the scale of voluntary programs both improves efficiency and reduces transfers. We show that discounting (paying less than full value for offsets) is inefficient and cannot be used to reduce the fraction of offsets that are spurious while setting stringent baselines generally can. Both approaches reduce the cost to the offsets buyer. The effects of two popular policy options are less favorable than many believe: Limiting the number of offsets that can be one-for-one exchanged with permits in a cap-and-trade system will lower the offset price but also quality. Trading ratios between offsets and allowances have ambiguous environmental effects if the cap is not properly adjusted. This paper frames the issues in terms of avoiding deforestation but the results are applicable to any voluntary offset program.
Correspondence between quasinormal modes and the shadow radius in a wormhole spacetime
Creators: name: Jusufi, Kimet
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper we study the correspondence between the real part of quasinormal modes (QNMs) and the shadow radius in a wormhole spacetime. Firstly we consider the above correspondence in a static and spherically symmetric wormhole spacetime and then explore this correspondence numerically by considering different wormhole models having specific redshift functions. To this end, we generalize this correspondence to the rotation wormhole spacetime and calculate the typical shadow radius of the rotating wormhole when viewed from the equatorial plane. We argue that due to the rotation and depending on the specific model, the typical shadow radius can increase or decrease and a reflecting point exists. Finally, we discuss whether a wormhole can mimic the black hole due to it's shadow. In the light of the EHT data, we find the upper and lower limits of the wormhole throat radius in the galactic center M87.
description: 10 pages, 5 figures. Published in GERG
ADOPT: a tool for predicting adoption of agricultural innovations
Creators: name: Kuehne, Geoff
name: Llewellyn, Rick S.
name: Pannell, David J.
name: Wilkinson, Roger
name: Dolling, P.
name: Ewing, Michael A.
name: Kuehne, Geoff
name: Llewellyn, Rick S.
name: Pannell, David J.
name: Wilkinson, Roger
name: Dolling, P.
name: Ewing, Michael A.
Publisher: name: Unknown
Year: 2011
Subjects: subject: Research and Development/Tech Change/Emerging Technologies
subject: Adoption
subject: Diffusion
subject: Prediction

description: A wealth of evidence exists about the adoption of new practices and technologies in agriculture but there does not appear to have been any attempt to simplify this vast body of research knowledge into a model to make quantitative predictions across a broad range of contexts. This is despite increasing demand from research, development and extension agencies for estimates of likely extent of adoption and the likely timeframes for project impacts. This paper reports on the reasoning underpinning the development of ADOPT (Adoption and Diffusion Outcome Prediction Tool). The tool has been designed to: 1) predict an innovation‘s likely peak extent of adoption and likely time for reaching that peak; 2) encourage users to consider the influence of a structured set of factors affecting adoption; and 3) engage R, D & E managers and practitioners by making adoptability knowledge and considerations more transparent and understandable. The tool is structured around four aspects of adoption: 1) characteristics of the innovation, 2) characteristics of the population, 3) actual advantage of using the innovation, and 4) learning of the actual advantage of the innovation. The conceptual framework used for developing ADOPT is described.
Mirror Symmetry of Calabi-Yau Supermanifolds
Creators: name: Ahn, Changhyun
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study super Landau-Ginzburg mirrors of the weighted projective superspace WCP^{3|2} which is a Calabi-Yau supermanifold and appeared in hep-th/0312171(Witten) in the topological B-model. One of them is an elliptic fibration over the complex plane whose coordinate is given in terms of two bosonic and two fermionic variables as well as Kahler parameter of WCP^{3|2}. The other is some patch of a degree 3 Calabi-Yau hypersurface in CP^2 fibered by the complex plane whose coordinate depends on both above four variables and Kahler parameter but its dependence behaves quite differently.
description: 12pp; the last paragraph of section 1 improved and some clarifications added
Nd isotopic stratigraphy of Paleoproterozoic to late Paleozoic sedimentary strata of the southwestern Yangtze Block and implications for its tectonic evolution
Creators: name: Gao, Yongjuan
name: Qin, Yadong
name: Lin, Shiliang
name: Ling, Wenli
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Neuroscience
subject: Pharmacology
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Computational Biology

description: A systematic Sm-Nd isotopic study is reported for Paleoproterozoic to Late Paleozoic strata from the Dongchuan area in the southwestern Yangtze Block. The results, combined with the available detrital zircon U-Pb ages and Hf isotope data, constrain the provenances of these sedimentary rocks and further identify three important tectono-magmatic activities. Most of the Paleo-Mesoproterozoic samples (Dongchuan Group) display a wide TDM2 range of 1.92–2.52 Ga with corresponding εNd(t) values of +4.0 to −3.5, suggesting Paleoproterozoic-dominated provenances mixed with mantle-derived materials. This corresponds to the ~1.7–1.5 Ga mafic magmatic activities commonly occurred in the southwestern Yangtze Block, which are related to the early breakup of the Columbia supercontinent. The obvious vale of TDM2 and apex of εNd(t) occurred in the Neoproterozoic strata (~0.8 Ga) of the southwestern margin over the whole Yangtze Block. This is consistent with the widely recognized mantle-derived magmatism around the Yangtze Block related to the breakup of Rodinia. However, the decreases in Nd model ages are different among various regions, indicating that the Neoproterozoic mantle inputs are more profound in the southwestern and central Yangtze Block than the southeastern Yangtze and the Jiangnan orogenic belt. The late Ediacaran to early Cambrian strata from the southwestern Yangtze exhibit a decrease in TDM2 (from 2.00 to 1.67 Ga) and increase in εNd(t) (from −9.0 to −5.2). This is in accordance with the coeval juvenile crustal materials discovered in the northwestern Yangtze, which were probably derived from the assembly of the Gondwana continent. Thus, a Gondwanan affinity is suggested for the southwestern Yangtze Block. Overall, the Nd isotopic studies of the Paleoproterozoic to Late Paleozoic sedimentary strata from the southwestern Yangtze Block identified three major episodes of magmatic activities, late Paleoproterozoic (~1.7 Ga), Neoproterozoic (~0.8 Ga) and late Neoproterozoic-early Cambrian (~0.55 Ga) in the context of Columbia, Rodinia and the subsequent Gondwana supercontinents.
Deep image prior for 3D magnetic particle imaging: A quantitative comparison of regularization techniques on Open MPI dataset
Creators: name: Dittmer, Sören
name: Kluth, Tobias
name: Henriksen, Mads Thorstein Roar
name: Maass, Peter
Publisher: name: International Journal on Magnetic Particle Imaging
Year: 2021

description: Magnetic particle imaging (MPI) is an imaging modality exploiting the nonlinear magnetization behavior of (super-) paramagnetic nanoparticles to obtain a space- and often also time-dependent concentration of a tracer consisting of these nanoparticles. MPI has a continuously increasing number of potential medical applications. One prerequisite for successful performance in these applications is a proper solution to the image reconstruction problem. More classical methods from inverse problems theory, as well as novel approaches from the field of machine learning, have the potential to deliver high-quality reconstructions in MPI. We investigate a novel reconstruction approach based on a deep image prior, which builds on representing the solution by a deep neural network. Novel approaches, as well as variational and iterative regularization techniques, are compared quantitatively in terms of peak signal-to-noise ratios and structural similarity indices on the publicly available Open MPI dataset. Int. J. Mag. Part. Imag. 7(1), 2021, Article ID: 2103001, DOI: 10.18416/IJMPI.2021.2103001
description: International Journal on Magnetic Particle Imaging, Vol 7 No 1 (2021)
Additional file 1 of Prostate-specific membrane antigen (PSMA) expression in adenoid cystic carcinoma of the head and neck
Creators: name: Nulent, Thomas J. W. Klein
name: Valstar, Matthijs H.
name: Smit, Laura A.
name: Smeele, Ludwig E.
name: Zuithoff, Nicolaas P. A.
name: Keizer, Bart De
name: Bree, Remco De
name: Es, Robert J. J. Van
name: Willems, Stefan M.
Publisher: name: figshare
Year: 2020
Subjects: subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Cancer
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Additional file 1: Supplementary Figure 1. Differences in PSMA expression between primary, recurrent and metastatic AdCC in 18 patients, in order of PSMA expression of the primary tumour.
Dark Energy, Scalar-Tensor Gravity and Large Extra Dimensions
Creators: name: Kainulainen, Kimmo
name: Sunhede, Daniel
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We explore in detail a dilatonic scalar-tensor theory of gravity inspired by large extra dimensions, where a radion field from compact extra dimensions gives rise to quintessence in our 4-dimensional world. We show that the model can give rise to other types of cosmologies as well, some more akin to $k$-essence and possibly variants of phantom dark energy. In our model the field (or radius) stabilization arises from quantum corrections to the effective 4D Ricci scalar. We then show that various constraints nearly determine the model parameters, and give an example of a quintessence-type cosmology consistent with observations. We show that the upcoming SNAP-experiment would easily distinguish the present model from a constant $Λ$ model with an \emph{equal} amount of dark energy, but that the SNAP-data alone will not be able distinguish it from a $Λ$ model with about 5% less dark energy.
description: Substantially revised version accepted for publication in Phys. Rev. D, 19 pages, 9 figures
Selection of organic solvents as reaction media for laccase from Trametes versicolor
Creators: name: Kushch, Olga V.
name: Hordieieva, Iryna O.
name: Sirobaba, Serhii I.
name: Shendrik, Alexander N.
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Biophysics
subject: Biochemistry
subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: Evolutionary Biology
subject: Chemical Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Infectious Diseases
subject: FOS: Health sciences

description: The ability of laccases to work effectively in properly selected aqueous-organic solutions significantly expands the scope of their application, making them commercially attractive and more competitive. However, it must be considered that molecules of organic solvent are very aggressive towards enzymes and destroy weak non-covalent interactions that maintain the spatial structure of the protein. In this work, we quantitatively described the influence of the nature of water-miscible organic solvents and their concentration on the activity and stability of Trametes versicolor laccase during the oxidation of ABTS (2,2-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid)) through the maximum rates and the Michaelis constants KM. The obtained kinetic parameters make it possible to compare the effect of various organic solvents on laccase and select the most optimal one, which minimizes the decrease in enzyme activity, maintains its stability and allows repeated use. Among the solvents studied, polyhydroxy compounds have the least negative effect on laccase activity; however, in all cases, a high concentration of organic solvent (≥30% (v/v)) leads to suppression of enzymatic activity. It has been shown that the longer the alkyl chain (hydrophobic fragment of the structure), the stronger the negative effect of alcohols on enzymes. The most toxic solvent for Trametes versicolor laccase is isopropanol. In addition, numerous examples of various uses of Trametes versicolor in aquatic-organic environments are discussed here.
Implementation of Conditional-Phase Gates based on tunable ZZ-Interactions
Creators: name: Collodo, Michele C.
name: Herrmann, Johannes
name: Lacroix, Nathan
name: Andersen, Christian Kraglund
name: Remm, Ants
name: Lazar, Stefania
name: Besse, Jean-Claude
name: Walter, Theo
name: Wallraff, Andreas
name: Eichler, Christopher
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: High fidelity two-qubit gates exhibiting low crosstalk are essential building blocks for gate-based quantum information processing. In superconducting circuits two-qubit gates are typically based either on RF-controlled interactions or on the in-situ tunability of qubit frequencies. Here, we present an alternative approach using a tunable cross-Kerr-type ZZ-interaction between two qubits, which we realize by a flux-tunable coupler element. We control the ZZ-coupling rate over three orders of magnitude to perform a rapid (38 ns), high-contrast, low leakage (0.14 %) conditional-phase CZ gate with a fidelity of 97.9 % without relying on the resonant interaction with a non-computational state. Furthermore, by exploiting the direct nature of the ZZ-coupling, we easily access the entire conditional-phase gate family by adjusting only a single control parameter.
Additional file 2 of Performance in dynamic movement tasks and occurrence of low back pain in youth floorball and basketball players
Creators: name: Rossi, M. K.
name: K. Pasanen
name: A. Heinonen
name: S. Äyrämö
name: A. M. Räisänen
name: M. Leppänen
name: G. Myklebust
name: T. Vasankari
name: P. Kannus
name: J. Parkkari
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: Additional file 2 Supplementary Table 2. Differences between players with and without baseline test result.
(Anti-)de Sitter Black Hole Thermodynamics and the Generalized Uncertainty Principle
Creators: name: Bolen, Brett
name: Cavaglia, Marco
Publisher: name: arXiv
Year: 2004
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We extend the derivation of the Hawking temperature of a Schwarzschild black hole via the Heisenberg uncertainty principle to the de Sitter and anti-de Sitter spacetimes. The thermodynamics of the Schwarzschild-(anti-)de Sitter black holes is obtained from the generalized uncertainty principle of string theory and non-commutative geometry. This may explain why the thermodynamics of (anti-)de Sitter-like black holes admits a holographic description in terms of a dual quantum conformal field theory, whereas the thermodynamics of Schwarzschild-like black holes does not.
description: 10 pages, revtex4
Rainbow odd cycles
Creators: name: Aharoni, Ron
name: Briggs, Joseph
name: Holzman, Ron
name: Jiang, Zilin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C38 (Primary) 05C70, 05B35 (Secondary)

description: We prove that every family of (not necessarily distinct) odd cycles $O_1, \dots, O_{2\lceil n/2 \rceil-1}$ in the complete graph $K_n$ on $n$ vertices has a rainbow odd cycle (that is, a set of edges from distinct $O_i$'s, forming an odd cycle). As part of the proof, we characterize those families of $n$ odd cycles in $K_{n+1}$ that do not have any rainbow odd cycle. We also characterize those families of $n$ cycles in $K_{n+1}$, as well as those of $n$ edge-disjoint nonempty subgraphs of $K_{n+1}$, without any rainbow cycle.
description: 14 pages, 2 figures, accepted to SIAM Journal on Discrete Mathematics (SIDMA)
Geographies of cultural capital : international education, circular migration and family strategies between Canada and Hong Kong
Creators: name: Waters, Johanna L.
Publisher: name: University of British Columbia
Year: 2009

description: This thesis examines recent patterns of global student mobility through the investigation of an emergent map of'international education' and the related socio-spatial strategies underpinning the contemporary transnational migration of students and their families between Canada and Hong Kong. It is particularly concerned with uncovering the symbolic meanings and practical implications of 'foreign educational credentials' for East Asian families; 'education' is conceived in terms of 'cultural capital' and is found to be intimately related to broader capital accumulation strategies amongst households seeking to reproduce their middle-class status in contemporary Hong Kong. Research was conducted in Vancouver and Hong Kong, including in-depth interviews with current immigrant students and returnee graduates. The thesis explores some of the main facets of education as geographically differentiated cultural capital and demonstrates also the central role of embedded social relations ('social capital') in the valuation of credentials. Broadly, it seeks to elucidate the relationship between the recent internationalisation of education in particular countries, trends in the long-distance spatial mobility of students from East Asia, and family strategies of capital accumulation and social class reproduction.
The Effect of Rotational Gravity Darkening on Magnetically Torqued Be Star Disks
Creators: name: Brown, J. C.
name: Telfer, D.
name: Li, Q.
name: Hanuschik, R.
name: Cassinelli, J. P.
name: Kholtygin, A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In the magnetically torqued disk (MTD) model for hot star disks, as proposed and formulated by \citet{cassi02}, stellar wind mass loss was taken to be uniform over the stellar surface. Here account is taken of the fact that as stellar spin rate S_o (=\sqrt {Ω_o^2 R^3/GM}) is increased, and the stellar equator is gravity darkened, the equatorial mass flux and terminal speed are reduced, compared to the poles, for a given total \mdot. As a result, the distribution of equatorial disk density, determined by the impact of north and southbound flows, is shifted further out from the star. This results, for high S_o (\gtrsim 0.5), in a fall in the disk mass and emission measure, and hence in the observed emission line EW, scattering polarization, and IR emission. Consequently, contrary to expectations, critical rotation S_o \to 1 is not the optimum for creation of hot star disks which, in terms of EM for example, is found to occur in a broad peak around S_o\approx 0.5-0.6 depending slightly on the wind velocity law. The relationship of this analytic quasi-steady parametric MTD model to other work on magnetically guided winds is discussed. In particular the failures of the MTD model for Be-star disks alleged by \citet{owo03} are shown to revolve largely around open observational tests, rather in the basic MTD physics, and around their use of insufficiently strong fields.
description: 25 pages with 11 figures, accepted by MNRAS
Lipase-catalyzed synthesis of laurate esters from puerarin and its β-D-fructofuranosyl-(2→6)-puerarin derivative
Creators: name: Campos, Amador
name: Casas-Godoy, Leticia
name: Torres-Tolentino, José-Guadalupe
name: Sandoval, Georgina
name: Hernández, Lázaro
name: Plou, Francisco J.
name: Arrizon, Javier
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Immunology
subject: FOS: Clinical medicine

description: This study investigates the transesterification of isoflavones puerarin and β-D-fructofuranosyl-(2→6)-puerarin to enhance their lipophilicity for specific pharmacological applications. The process achieved high yields (80-100%) in the isoflavones conversion when commercial lipases from Candida antarctica (CALB) and Thermomyces lanuginosus (TL IM) were used. The acylation patterns between CALB and TL IM varied depending on the substrate; both enzymes yielded principally monoacylated products from puerarin and β-D-fructofuranosyl-(2→6)-puerarin. However, TL IM also produced di- and triacylated derivatives of β-D-fructofuranosyl-(2→6)-puerarin in substantial amounts. Structural characterization by NMR identified puerarin-6ʹʹ-O-laurate and β-D-fructofuranosyl-(2→6)-puerarin-6ʹʹʹ-O-laurate as the primary products in CALB and TL IM reactions. These acyl derivatives presented improved lipophilicity (Log P from −1.0 − 0.16 to 3.26 − 3.58) and antioxidant activity (67.2-97.3 to 102.5-131.4 µM TE/mmol). Therefore, these compounds have potential pharmacological applications.
Teoria do valor-trabalho: Determinação pelo trabalho vivo como alternativa às interpretações fisiológica e da forma-valor
Creators: name: de Paula, Patrick
Publisher: name: figshare
Year: 2021
Subjects: subject: Economics
subject: 149903 Heterodox Economics
subject: FOS: Economics and business
subject: 140203 Economic History

description: O objetivo deste artigo é apresentar uma interpretação da teoria marxista do valor-trabalho que difere da interpretação tradicional e fisiológica o valor como trabalho incorporado nas mercadorias no momento da produção, mas difere também da interpretação que remonta ao trabalho de Rubin (ou a certa leitura de seu trabalho), que vê a determinação quantitativa do valor através do mercado (circulação), ou pelo direcionamento da produção ao mercado. Nessa interpretação alternativa, é o trabalho vivo, ou seja, o trabalho socialmente necessário para a reprodução de uma mercadoria no momento do intercâmbio, que determina quantitativamente o valor das mercadorias, enquanto o trabalho abstrato é resultado da redução do processo de trabalho a um momento do processo de valorização do capital, característica da época capitalista. Depois de apresentada esta interpretação, é apresentada uma crítica às interpretações anteriores.
Free product formulae for quantum permutation groups
Creators: name: Banica, Teodor
name: Bichon, Julien
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 16W30 (46L37, 46L54)

description: Associated to a finite graph $X$ is its quantum automorphism group $G(X)$. We prove a formula of type $G(X*Y)=G(X)*_wG(Y)$, where $*_w$ is a free wreath product. Then we discuss representation theory of free wreath products, with the conjectural formula $μ(G*_wH)=μ(G)\boxtimesμ(H)$, where $μ$ is the associated spectral measure. This is verified in two situations: one using free probability techniques, the other one using planar algebras.
description: 31 pages
Topologically twisted index of $T[SU(N)]$ at large $N$
Creators: name: Coccia, Lorenzo
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We compute, in the large $N$ limit, the topologically twisted index of the 3d $T[SU(N)]$ theory, namely the partition function on $Σ_{\mathfrak{g}} \times S^1$, with a topological twist on the Riemann surface $Σ_{\mathfrak{g}}$. To provide an expression for this quantity, we take advantage of some recent results obtained for five dimensional quiver gauge theories. In case of a universal twist, we correctly reproduce the entropy of the universal black hole that can be embedded in the holographically dual solution.
description: 34 pages. v2: references added and corrected, other minor adjustments. v3: minor changes, clarifications added in the Introduction and in Section 4. Accepted for pubblication in JHEP
Assessing Domestic Demand for Organic and ‘Locally Grown' Produce on An ‘Organic Island': Dominica's Dilemma
Creators: name: Boys, Kathryn A.
name: Willis, David B.
name: George, Seraphine
name: Hammig, Michael D.
name: Boys, Kathryn A.
name: Willis, David B.
name: George, Seraphine
name: Hammig, Michael D.
Publisher: name: Unknown
Year: 2011
Subjects: subject: Agricultural and Food Policy
subject: International Development
subject: Marketing
subject: FOS: Economics and business
subject: contingent valuation
subject: willingness to pay
subject: Caribbean
subject: organic
subject: locally grown
subject: food

description: The economy of Dominica faces a unique set of challenges. As with many other Caribbean nations, Dominica has historically been dependent upon agriculture. Over the past several hundred years, the island's economy has been largely supported through the concentrated mono-cropping of a variety of export-oriented crops including coffee, limes, vanilla, and bananas (FAVACA, 2008). Today, approximately 45% of Dominica's labor force is employed in the agricultural sector (FAVACA, 2008). While neighboring countries have economically benefited from tourism, due to its lack of white sand beaches, Dominica is not a typical tourist destination. Taking advantage of its landscape, rainforests, and diversity of natural wildlife, in an effort to diversify its economy Dominica has instead catered to eco-/wellness tourists. Bridging its agricultural foundations with the ecological preservation needed to support its tourist industry, the government of Dominica has signaled its interest in transforming Dominica into an Organic Island (‘Organic Dominica') by 2015. Through this initiative, sustainable, organic agricultural production methods will be encouraged. Complementing this, a ‘Buy Organic, Locally Grown' campaign has been proposed to encourage domestic and regional consumption of Dominica's agricultural outputs and food products. As such, ‘Organic Dominica' has the potential to simultaneously address ongoing national concerns surrounding food security, foreign exchange availability, domestic un/underemployment, and environmental preservation. Before and since proposing this policy, surveys were conducted to identity the major stakeholders in (organic) agricultural production, and current and potential markets for organic production. It remains, however, to quantify Dominica's capacity to produce organic goods, the scale of the potential market, and the price premia that organic production could command. This information is critical to determining the appropriate initial level of producer support and marketing programs required to successfully promote the production and consumption of Dominica's organic outputs and propel Dominica toward the desired status of a model ‘Organic Island'.
Large negative magnetoresistance in a ferromagnetic shape memory alloy : Ni_{2+x}Mn_{1-x}Ga
Creators: name: Biswas, C.
name: Rawat, R.
name: Barman, S. R.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: 5% negative magnetoresistance (MR) at room temperature has been observed in bulk Ni_{2+x}Mn_{1-x}Ga. This indicates the possibility of using Ni_{2+x}Mn_{1-x}Ga as magnetic sensors. We have measured MR in the ferromagnetic state for different compositions (x=0-0.2) in the austenitic, pre-martensitic and martensitic phases. MR is found to increase with x. While MR for x=0 varies almost linearly in the austenitic and pre-martensitic phases, in the martensitic phase it shows a cusp-like shape. This has been explained by the changes in twin and domain structures in the martensitic phase. In the austenitic phase, which does not have twin structure, MR agrees with theory based on s-d scattering model.
description: 3 pages, 3 figures, Appl. Phys. Lett 86, 202508 (2005)
A perturbative model for the feedback cooling of finite temperature Bose gases
Creators: name: Blacker, Matthew J.
Publisher: name: The Australian National University
Year: 2020
Subjects: Quantum dynamics
cold-atoms
Bogoliubov theory

description: Ultra-cold atomic gases are an ideal platform for precision measurement devices and analogue quantum simulators, which will prove instrumental in unlocking the secrets of quantum gravity and high-temperature superconductivity. However, current experimental techniques cannot cool atomic gases to simulatenously both the low entropies and high particle numbers necessary for these applications. A promising alternative is feedback cooling: using continuous-measurement feedback control to damp out energy fluctuations and cool a gas. So far, feedback cooling has been primarily studied at zero temperature, with the only finite temperature simulation achieved via a computationally expensive numerical method restricted to bosons. This thesis develops a perturbative model for the feedback cooling of a finite temperature condensed Bose gas using Bogoliubov theory, with the aim of deriving dynamic equations for the system that are both analytically tractable, and allow for fast numerical prototyping of new feedback control schemes. Using the measurement-feedback model of Szigeti \textit{et al.} \cite{szigeti_continuous_2009,szigeti_feedback_2010}, we derive a low temperature perturbative model for feedback cooling of a Bose gas in an arbitrary trapping and control potential. Using this general model, we then derive a model for the dynamics of a Bose gas in a hard box trap being cooled with an energy damping control. We complete preliminary simulations of this model in the no-backaction conditional measurement limit, damping out density fluctuations in a gas of $90\%$ condensate fraction and cooling it to $93.5 \pm 1\%$. We find that, in this limit, the dynamics of the gas are largely independent of number but significantly depend on the inter-particle interaction. We also find an optimal energy damping control strength in this limit. However, our model is not very efficient for simulation, particularly for a large number of particles and measurement strength. As an alternative, we propose an approximation scheme in which steady-state analytic solutions could be obtained from the model. Finally, we propose two methods to develop a Bogoliubov model for the feedback cooling of fermions, which would be the first finite temperature model for the Fermi gas case.
Constraints on New Physics from $K \to πν\barν$
Creators: name: Deshpande, N. G.
name: Ghosh, Dilip Kumar
name: He, Xiao-Gang
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study constraints on new physics from the recent measurement of Br ($K^+ \to π^+ ν\bar ν)$ by the E787 and E949 Collaborations. In our analysis we consider two models of new physics: $(a)$ extra down type singlet quark model (EDSQ) and $(b)$ R-parity violating Minimal Supersymmetric Standard Model(MSSM). We find that $K^+\to π^+ ν\bar ν$ along with other processes like $K_L \to μ^+ μ^-, ε^\prime/ε$ provide useful bounds on the parameter $U_{sd}$, characterizing the off-diagonal $Z-d-\bar s $ coupling of model $(a)$. The bounds on the ${\rm Re}(U_{sd})$ from $(K_L \to μ^+μ^-)_{\rm SD}$ and ${\rm Im}(U_{sd})$ from $ε^\prime/ε$ are so tight that the branching ratio of $K^+\to π^+ ν\bar ν$ can exceed the standard model value by at most a factor of two For model b), we also obtain stringent bounds on certain combinations of product of two $\lp_{ijk}$ couplings originating from $L$ number violating operator $ L_i Q_j D^c_k $ using $K^+ \to π^+ ν\bar ν$ and $K_L \to μ^+ μ^-$ processes. Even with the stringent constraints on $U_{sd}$ (in model $(a)$) and on products of two $\rp$couplings (model $(b)$), we find that the branching ratios for $K_L \to π^0 ν\bar ν$ and $K_L \to π^0 e^+ e^-$ can be substantially different in both the above models from those predicted in the standard model.
description: K_L --> pi^0 e+ e- section has been altered, new references to this process are cited. One Figure has been removed and other Figure modified
Using Weak Separability and Generalized Composite Commodity Theorem in Modeling Ground Beef Demand
Creators: name: Schulz, Lee L.
name: Schroeder, Ted C.
name: Xia, Tian
name: Schulz, Lee L.
name: Schroeder, Ted C.
name: Xia, Tian
Publisher: name: Unknown
Year: 2011
Subjects: subject: Demand and Price Analysis
subject: Aggregation
subject: Generalized Composite Commodity Theorem
subject: beef demand
subject: weak separability

description: Ground beef is an important component of overall beef demand. We utilize retail scanner data of branded ground beef with differing lean percentage levels to provide information on appropriate aggregation schemes and determine whether these schemes are consistent with weakly separable preferences. This study provides the first estimated price and income elasticities for individual ground beef lean percentage and branded products. These estimates provide better understanding of how consumers make decisions concerning ground beef purchases.
description: Replaced with revised version of paper 06/15/11.
Reactive ion etching of tantalum in silicon tetrachloride.pdf
Creators: name: Al-mashaal, Asaad K.Edaan
Publisher: name: figshare
Year: 2025
Subjects: classificationCode: 401801
subject: Micro- and nanosystems
classificationCode: 401802
subject: Molecular and organic electronics
classificationCode: 401803
subject: Nanoelectromechanical systems
classificationCode: 401804
subject: Nanoelectronics
classificationCode: 401807
subject: Nanomaterials
classificationCode: 401806
subject: Nanomanufacturing
classificationCode: 401805
subject: Nanofabrication, growth and self assembly
classificationCode: 401809
subject: Nanophotonics
classificationCode: 401808
subject: Nanometrology
classificationCode: 401605
subject: Functional materials
classificationCode: 401607
subject: Metals and alloy materials

description: A precise patterning of metal structures plays an essential role in the development of feasible metal-based de­ vices. By examining the etching conditions under which a layer of material is properly etched, the etching process can be further optimised and hence controlled. This work reports on the reactive ion etching (RIE) of micrometric films of tantalum (Ta) using silicon tetrachloride (SiCl4)/Argon (Ar) plasmas. The etching charac­ teristics have been studied with respect to SiCl4/Ar ratio, plasma power and chamber pressure. It has been found that increasing the flow rate of SiCl4 or plasma power leads to an increase in the etching rate. Moreover, the observations suggest that it is ineffective to increase the flow rate of Ar to more than 30 sccm and the plasma pressure to more than 100 mTorr. The work implemented here represents an important step for the development of tantalum-based structures that can be used in a wide range of devices.