cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
From Farm Income to Food Consumption: Valuing USDA Data Products
Creators: name: Lusk, Jayson L.
name: Lusk, Jayson L.
Publisher: name: Unknown
Year: 2016
Subjects: Agricultural and Food Policy
Research and Development/Tech Change/Emerging Technologies
Research Methods/ Statistical Methods

description: Tightening budgets and increased calls for accountability have sparked efforts to determine the value of U.S. Department of Agriculture (USDA) data products. This report surveys the social science literature on the value of public data, explores the research on the value of USDA data, and describes a framework for prioritizing data collection and reporting. There are a number of motivations for the public provision of information, such as public-good and externality argu-ments, the potential to improve market efficiency and resource allocation, and the desire to reduce information asym-metries and inequities, which suggest a potential under-provision of market information by the private sector. The value of information is related to the ability of producers, speculators, and consumers to make decisions that better correspond with reality. A wide variety of empirical approaches have been used to study the value of information, and the advantages and disadvantages of each are explored. Researchers have used market-reaction tests most often to assess the value of USDA commodity information. The extant literature consistently shows that such data provides valuable information to market participants. Although numerous studies provide indirect evidence that USDA data offer significant economic value, prior research has largely refrained from quantifying the value of data in a way that can be compared with costs. A proposed framework for data product prioritization requires decision-makers to weight the relative merits of different factors affecting the value of data collec-tion and dissemination. The framework can be used to provide qualitative guidance and quantitative, relative rankings of alternative data products. The last section of the report offers recommendations for further research, understanding the extent of data product use across Federal agencies and streamlining data products to more closely match how and when they are most useful.
title: Experimental Investigations Into the Role of Dietary Protein on the Control of Energy Intake and Body Mass in Humans
Creators: name: Hall, Rosemary Megan
Publisher: name: The Open University
Year: 2011

description: Evidence is needed to inform dietary strategies to promote a healthy weight and reduce cardiovascular risk. Dietary protein (P) may influence both energy intake (EI) and energy expenditure (EE). To determine the relationships between appetite control, body mass regulation and protein from different animal and vegetable sources, healthy lean subjects were studied in tightly controlled experiments.

In a 5-way crossover study, 28 subjects aged 19-68 years consumed 2.5 MJ high-protein preload meals (33% energy from protein (P), 34% fat (F), 33% carbohydrate (C)) rich in meat, dairy, nuts and legumes, soy, or control (15%P, 34%F, 51%C), followed by test meals 180 min later. Appetite control mechanisms before, during and for 5 hours after eating, were assessed from analysis of serial blood samples and other physiological measurements. Mean EI was lower after soy (4.1±0.4 MJ) than control (4.6±0.4 MJ), meat (4.7±0.4 MJ), dairy (4.6±0.4 MJ) or nuts/legumes (5.0±0.5 MJ) preloads. Gastric emptying was slower and hunger decreased after soy, and after nuts/legumes, satiation increased and hunger reduced. Blood glucose and insulin excursions were significantly lower after the nuts/legumes and soy meals.

Similar parameters, plus urinary nitrogen, EI and EE were measured in 10 adults during 3 five-day residential experiments. On days 1-3, they ate ad libitum diets providing 10%, 15%, or 25% protein, 30% fat and the remainder as carbohydrate. EI was fixed at maintenance requirements on day 4 and EE was measured by calorimeter. EI was lower during the 25%P (8.1±1.0 MJ/d) than the 15%P diet (8.7±1.0 MJ/d) with higher fullness scores, flatter glucose curves and higher pancreatic polypeptide concentration. EE was similar but fat oxidation was higher on the 25%P diet.

Higher dietary protein promotes energy balance, through decreased energy intake and increased fat oxidation, improves metabolic risk factors, and may be useful to prevent weight gain and related metabolic diseases.
Pre-Harvest Risk Management for Kentucky Grain Farms
Creators: name: Davis, Todd D.
name: Schwenke, Eric
name: Davis, Todd D.
name: Schwenke, Eric
Publisher: name: Unknown
Year: 2018
Subjects: subject: Farm Management
subject: Risk and Uncertainty
subject: grain
subject: futures
subject: risk management
subject: forward contracts

description: Corn, soybean, and wheat pre-harvest price risk management strategies are evaluated using data from 2001 to 2017 crop years. A comparison of seasonality of the December corn, November soybeans, and July wheat futures contracts is used to determine potential months to implement hedges. The value of hedges is compared to use of cash forward contracts or cash sales at harvest.
High precision mass measurements of the isomeric and ground states of $^{44}$V: improving constraints on the IMME parameters of the A=44, $\text{0}^{\text{+}}$ quintet
Creators: name: Puentes, D.
name: Bollen, G.
name: Brodeur, M.
name: Eibach, M.
name: Gulyuz, K.
name: Hamaker, A.
name: Izzo, C.
name: Lenzi, S. M.
name: MacCormick, M.
name: Redshaw, M.
name: Ringle, R.
name: Sandler, R.
name: Schwarz, S.
name: Schury, P.
name: Smirnova, N. A.
name: Surbrook, J.
name: Valverde, A. A.
name: Villari, A. C. C.
name: Yandow, I. T.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The Isobaric Multiplet Mass Equation (IMME) has been successful at predicting the masses of isobaric analogue states in the same multiplet, while its coefficients are known to follow trends as functions of mass number. The Atomic Mass Evaluation 2016 [Chin. Phys. C 41, 030003 (2017)] $^{44}$V mass value results in an negative $c$ coefficient for the IMME quadratic term. The $b$ and $c$ coefficients can provide constraints for construction of the isospin-nonconserving (INC) Hamiltonians for the $pf$ shell. The excitation energy of the $0^+, T=2$ level in $^{44}$V is currently unknown and can be used to constrain the $^{44}$Cr mass. The aim of the experiment was to perform high-precision mass measurements to resolve the difference between $^{44}$V isomeric and ground states, to test the IMME, and to provide ingredients for identifying the $0^+$, $T=2$ state in $^{44}$V. High-precision Penning trap mass spectrometry was performed at LEBIT, to measure the cyclotron frequency ratios of [$^{44g,m}$VO]$^+$ versus [$^{32}$SCO]$^+$, a reference mass, to extract both the isomeric and ground state masses of $^{44}$V. The mass excess of the ground and isomeric states in $^{44}$V were measured to be $-23\ 804.9(80)$ keV/$\text{c}^2$ and $-23\ 537.0(55)$ keV/$\text{c}^2$. This yielded a new proton separation energy of $S_p$ = 1\ 773(10) keV. The new mass values of $^{44}$V have been used to deduce the IMME $b$ and $c$ coefficients of the lowest $2^+$ and $6^+$ triplets in $A=44$. The $2^+$ $c$ coefficient is verified with the IMME trend and agrees with the shell-model predictions using charge-dependent Hamiltonians. The mirror energy differences were determined between $^{44}$V and $^{44}$Sc, in line with isospin-symmetry. The new value of the proton separation energy determined will be important for the determination of the $0^+$, $T=2$ state in $^{44}$V and for prediction of the mass of $^{44}$Cr.
description: 9 pages, 5 figures
Vorticity and vortex-core states
Creators: name: Berthod, C.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The origin of the vortex-core states in s-wave and d_{x^2-y^2}-wave superconductors is investigated by means of some selected numerical experiments. By relaxing the self-consistency condition in the Bogoliubov-de Gennes equations and tuning the order parameter in the core region, it is shown that the suppression of the superfluid density in the core is not a necessary condition for the core states to form. This excludes ``potential well'' types of interpretations for the core states. The topological defect in the phase of the order parameter, however, plays a crucial role. This observation is explained by considering the effect of the vortex supercurrent on the Bogoliubov quasiparticles, and illustrated by comparing conventional vortices with multiply-quantized vortices and vortex-antivortex pairs. The core states are also found to be extremely robust against random phase disorder.
description: REVTeX 4, 11 pages, 8 EPS figures
Quantum dynamics in strongly driven random dipolar magnets
Creators: name: Buchhold, M.
name: Tang, C. S.
name: Silevitch, D. M.
name: Rosenbaum, T. F.
name: Refael, G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The random dipolar magnet LiHo$_x$Y$_{1-x}$F$_4$ enters a strongly frustrated regime for small Ho$^{3+}$ concentrations with $x<0.05$. In this regime, the magnetic moments of the Ho$^{3+}$ ions experience small quantum corrections to the common Ising approximation of LiHo$_x$Y$_{1-x}$F$_4$, which lead to a $Z_2$-symmetry breaking and small, degeneracy breaking energy shifts between different eigenstates. Here we show that destructive interference between two almost degenerate excitation pathways burns spectral holes in the magnetic susceptibility of strongly driven magnetic moments in LiHo$_x$Y$_{1-x}$F$_4$. Such spectral holes in the susceptibility, microscopically described in terms of Fano resonances, can already occur in setups of only two or three frustrated moments, for which the driven level scheme has the paradigmatic $Λ$-shape. For larger clusters of magnetic moments, the corresponding level schemes separate into almost isolated many-body $Λ$-schemes, in the sense that either the transition matrix elements between them are negligibly small or the energy difference of the transitions is strongly off-resonant to the drive. This enables the observation of Fano resonances, caused by many-body quantum corrections to the common Ising approximation also in the thermodynamic limit. We discuss its dependence on the driving strength and frequency as well as the crucial role that is played by lattice dissipation.
description: 15 pages, 9 figures
Data Management and Mining in Astrophysical Databases
Creators: name: Frailis, M.
name: De Angelis, A.
name: Roberto, V.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Databases (cs.DB)
subject: Astrophysics (astro-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences
subject: H.2.4; H.2.8

description: We analyse the issues involved in the management and mining of astrophysical data. The traditional approach to data management in the astrophysical field is not able to keep up with the increasing size of the data gathered by modern detectors. An essential role in the astrophysical research will be assumed by automatic tools for information extraction from large datasets, i.e. data mining techniques, such as clustering and classification algorithms. This asks for an approach to data management based on data warehousing, emphasizing the efficiency and simplicity of data access; efficiency is obtained using multidimensional access methods and simplicity is achieved by properly handling metadata. Clustering and classification techniques, on large datasets, pose additional requirements: computational and memory scalability with respect to the data size, interpretability and objectivity of clustering or classification results. In this study we address some possible solutions.
description: 10 pages, Latex
Little Higgs Phenomenology
Creators: name: Logan, Heather E.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Recently a new class of models has emerged that addresses the naturalness problem of a light Higgs boson. In these ''little Higgs'' models, the Standard Model Higgs boson is a pseudo-Nambu-Goldstone boson of an approximate global symmetry. The Higgs boson acquires mass radiatively only through ''collective breaking'' of the global symmetry, so that more than one interaction is required to give the Higgs a mass. This protects the Higgs mass from receiving quadratically divergent radiative corrections at one-loop. These models contain new vector bosons, fermions and scalars at the TeV scale that cancel the quadratic divergences in the Higgs mass due to the Standard Model gauge, top quark, and Higgs boson loops. In this talk I review the phenomenology of the little Higgs models, focusing on collider signatures and electroweak precision constraints.
description: 3 pages, 2 figures, talk given at EPS 2003, Aachen, Germany, July 2003
Quarkonium Production in Heavy Ion Collisions: From Open Quantum System to Transport Equation
Creators: name: Yao, Xiaojun
name: Ke, Weiyao
name: Xu, Yingru
name: Bass, Steffen A.
name: Mehen, Thomas
name: Müller, Berndt
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Using the open quantum system formalism and effective field theory of QCD, we derive the Boltzmann transport equation of quarkonium inside the quark-gluon plasma. Our derivation illuminates that the success of transport equations in quarkonium phenomenology is closely related to the separation of scales in the problem.
description: 4 pages, 3 figures; contribution to the proceedings of XXVIIIth International Conference on Ultrarelativistic Nucleus-Nucleus Collisions (Quark Matter 2019); updated a few references
title: An agenda for preventive diplomacy : implications for ASEAN and regional conflict management in Southeast Asia
Creators: name: Michael Tivayanond, J
Publisher: name: University of Kent
Year: 2022

description: The post Cold War international system faces a number of key challenges. Among these, the increasingly complex nature of global conflicts and the inability of the United Nations to cope adequately with such cases has called for the identification of more effective methodologies of international conflict management. In this light, not only has it been suggested that regional organisations should play a more active role in assisting the world organisation in the responsibility for maintaining international peace and security, but it has also been recommended that the activities associated with the practice of preventive diplomacy can provide a more useful approach to this end. Preventive diplomacy can be classified into two main categories. On the one hand there is long-term preventive diplomacy which aims at the creation and maintenance of cooperative relationships between entities so that the functional value of conflict can be eradicated over time. On the other hand there is short-term preventive diplomacy which is concerned with thwarting the emergence or escalation of violent conflict at the inter-state and at the intra-state level. Preventive diplomacy aimed at thwarting violence involves a select group of functions and these include the activities of fact-finding and early warning, the use of diplomatic `good offices', the application of confidence-building measures, and the act of preventive deployment. These activities require adequate resources, preparation and political support. However it cannot be assumed that certain regional organisations, in the call to be more supportive to the United Nations, will be readily able to implement such measures of preventive diplomacy. The Association of South East Asian Nations (ASEAN) is one particular regional organisation which has been finding it difficult to fully develop such a preventive diplomacy capability. ASEAN is a regional organisation preoccupied with fortifying intra-mural political unity, and with proving itself as a consequential grouping of states within the wider Asia-Pacific region. It is also a regional organisation that continues to be informed by a deeply embedded style of regional conflict management known as the `ASEAN way'. These inter-related factors have made considering a preventive diplomacy agenda less of a priority for ASEAN. Needless to say, it is essential for the ASEAN states to acknowledge the importance of more substantial conflict prevention measures for the region.
Marginal Cost of Carbon Abatement through Afforestation of Agricultural Land in the Mississippi Delta
Creators: name: Moore, Karli A.
name: Kovacs, Kent F.
name: Moore, Karli A.
name: Kovacs, Kent F.
Publisher: name: Unknown
Year: 2018
Subjects: subject: Environmental Economics and Policy
subject: Land Economics/Use
subject: afforestation
subject: carbon sequestration
subject: land

description: Sequestration of atmospheric carbon in forested lands offsets carbon emissions from other industries. Conversion of private lands, particularly agricultural tracts in marginal areas, to forests can bolster carbon abatement. The United States Department of Agriculture (USDA) administers voluntary, incentive-based programs to encourage landowners to adopt production practices with positive environmental outcomes. This policy can be used to increase transition from marginal agricultural land to forests, thereby creating new carbon sinks. We analyze an eleven-county study area in the Mississippi Delta region of Arkansas to determine feasibility for a subsidy focused on carbon abatement through afforestation. This study area is significant for two reasons: the long growing season and humid climate is ideal for fast growing trees such as loblolly pine, and groundwater depletion dynamics factor heavily into future optimal land use patterns. A spatially-explicit optimization model will determine the pattern of land use that maximizes discounted economic returns to landowners and explore responsiveness of optimal land use to government subsidies. The product of this effort, a marginal cost curve for carbon abatement, will assist policymakers in allocating limited resources to programs for greenhouse gas mitigation.
Abaxisotima spiniforma Wang and Shi 2009
Creators: name: Wang, Gang
name: Shi, Fu-Ming
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Orthoptera
Phaneropteridae
Abaxisotima
Abaxisotima spiniforma

description: Abaxisotima spiniforma Wang and Shi, 2009
(Figures 3J, 5C)
 Abaxisotima spiniforma Wang and Shi 2009: 32.
 Material examined
One male, Yongshan, Yunnan, 1930 m, 20 July 2006; one male, Yongshan, Yunnan, 1780m, 20 July 2006; one male, Daguan, Yunnan, 2030 m, 22 July 2006; one male, Daguan, Yunnan, 1845 m, 22 July 2006; one female, Daguan, Yunnan, 25 July 2006, one female, Yanjin, Yunnan, 1875 m, 28 July 2006, all collected by Guo Xiao.
 Distribution
China (Yunnan).
description: Published as part of Wang, Gang & Shi, Fu-Ming, 2012, The genus Abaxisotima Gorochov (Orthoptera: Tettigoniidae: Phaneropterinae) from China, pp. 2537-2547 in Journal of Natural History (J. Nat. Hist.) (J. Nat. Hist.) 46 (41 - 42) on pages 2540-2541, DOI: 10.1080/00222933.2012.708446, http://zenodo.org/record/4652693
Generalized uncertainty principle and $D$-dimensional quantum mechanics
Creators: name: Park, DaeKil
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The non-relativistic quantum mechanics with a generalized uncertainty principle (GUP) is examined in $D$-dimensional free particle and harmonic oscillator systems. The Feynman propagators for these systems are exactly derived within the first order of the GUP parameter.
description: 13 pages, 1 figure, will appear in PRD
Phase correlation of laser waves with arbitrary frequency spacing
Creators: name: Huss, A. F.
name: Lammegger, R.
name: Neureiter, C.
name: Korsunsky, E. A.
name: Windholz, L.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The theoretically predicted correlation of laser phase fluctuations in Lambda-type interaction schemes is experimentally demonstrated. We show, that the mechanism of correlation in a Lambda scheme is restricted to high frequency noise components, whereas in a double-$Λ$ scheme, due to the laser phase locking in closed-loop interaction, it extends to all noise frequencies. In this case the correlation is weakly sensitive to coherence losses. Thus the double-Lambda scheme can be used to correlate e.m. fields with carrier frequency differences beyond the GHz regime.
description: 4 pages, 4 figures
Data and codes behind "Crowdsourced mapping of unexplored target space of kinase inhibitors"
Creators: name: Cichońska, Anna
name: Ravikumar, Balaguru
name: Allaway, Robert J
name: Fangping Wan
name: Sungjoon Park
name: Isayev, Olexandr
name: Shuya Li
name: Mason, Michael
name: Lamb, Andrew
name: Ziaurrehman Tanoli
name: Minji Jeon
name: Sunkyu Kim
name: Popova, Mariya
name: Capuzzi, Stephen
name: Jianyang Zeng
name: Dang, Kristen
name: Koytiger, Gregory
name: Jaewoo Kang
name: Carrow I. Wells
name: Willson, Timothy M.
name: Consortium, The IDG-DREAM Drug-Kinase Binding Prediction Challenge
name: Oprea, Tudor I.
name: Schlessinger, Avner
name: Drewry, David H.
name: Stolovitzky, Gustavo
name: Wennerberg, Krister
name: Guinney, Justin
name: Aittokallio, Tero
Publisher: name: Zenodo
Year: 2021
Subjects: Kinase inhibitor
Kinase
Drug-kinase interaction
Binding affinity prediction
Machine learning
DREAM Challenge
Crowdsourced competition

description: This repository contains the data underlying the figures in the journal publication describing the IDG-DREAM Drug Kinase Binding Prediction Challenge [1] as well as archives of the two following GitHub repositories: IDG-DREAM-Challenge-Analysis-ncomms.zip (https://github.com/Sage-Bionetworks/IDG-DREAM-Challenge-Analysis): codes for reproducing the analyses described in [1]; licence Apache 2.0. IDG-DREAM-Drug-Kinase-Challenge-ncomms.zip (https://github.com/Sage-Bionetworks/IDG-DREAM-Drug-Kinase-Challenge): codes used for the Challenge scoring; licence Apache 2.0. References
 [1] Cichońska A, Ravikumar B, Allaway RJ, Wan F, Park S, Isayev O, Li S, Mason M, Lamb A, Tanoli Z, Jeon M, Kim S, Popova M, Capuzzi S, Zeng J, Dang K, Koytiger G, Kang J, Wells CI, Willson TM, The IDG-DREAM Drug-Kinase Binding Prediction Challenge Consortium, Oprea TI, Schlessinger A, Drewry DH, Stolovitzky G, Wennerberg K, Guinney J, Aittokallio T. Crowdsourced mapping of unexplored target space of kinase inhibitors. Nature Communications 2021.
Fractional Quantum Hall Edge Electrons, Chiral Anomaly and the Berry Phase
Creators: name: Basu, B.
name: Bandyopadhyay, P.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: It is shown that the deviation of fractional quantum Hall edge fluid from power law correlation functions with universal exponent $α=1/ν$ as observed in recent experiment may be explained when analyzed from the viewpoint of chiral anomaly and Berry phase. It is observed that at the edge anomaly vanishes and this induces a nonlocal effect in the construction of the electron creation operator in terms of the edge boson fields. This nonlocality is responsible for the deviation of the power law exponent from $α=1/ν$ of the edge fluid. There are gapless edge excitations described by chiral boson fields and the number of branches of chiral boson fields can be related to the polarization states of electrons in the bulk. We have noted that for fully polarized state at $ν=\frac{1}{2m \pm 1}$ we will have a single branch whereas for partially polarized state at $ν=\frac{n}{2mn \pm 1}$, with $n >1$ and odd, we will have $n$ branches. However for unpolarized state at $ν=\frac{n}{2mn \pm 1}$ with $n$ even we will have two branches.
description: 8 pages
title: Detection and Analysis of Debris Discs
Creators: name: Marshall, Jonathan Peter
Publisher: name: The Open University
Year: 2011

description: Debris discs are the dusty remnants of the planet formation process around main sequence stars, detected through their emission at infrared wavelengths. The study of these objects improves our understanding of both the frequency and the timescale of planet formation around other stars, and, in resolved disc systems, can be used as an indirect method of planet detection in regions of orbital radius-planet mass space where standard methods (e.g. radial velocity, transits) are insensitive.

In Chapter 1, an overview of debris discs is presented, summarising the key results since their discovery and a synopsis of the most recent results. The motivation and goals for the research undertaken in this thesis are also placed within the context of our current understanding of debris discs. In Chapter 2, the mathematics of the computer models used in fitting debris disc observations with physical structure and dust grain properties are explained, starting from the black body approximation.

In Chapter 3, a search for new YSO candidates in the LI551 region is presented, comparing the YSO population with both the Taurus cloud and other similar low mass star forming regions.

In Chapter 4, the results of a search for debris discs in the AKARI FIS all sky survey are presented. Over 50 debris disc candidates are identified in the survey, though half of these have been previously observed by IRAS. Two dozen new candidates are identified at 90 μm.

In Chapter 5, a search for mid infrared excess from DUNES sources in the AKARI IRC point source catalogue is presented. Fourteen stars with infrared excess are identified, from the 102 stars with 18 μm photometry in the 133 star sample.

In Chapter 6, the Herschel ATLAS field observed during the science demonstration phase is analysed, looking for debris discs at sub-mm wavelengths. The surprising result indicates the presence of several very high mass discs (> M⊕), with no reported excess in the far infrared, implying these discs are widely separated from their stars and very cold.

In Chapter 7, a dynamical study of the HR8799 planetary system is presented, using the MERCURY code to test the stability of the observed planetary architecture over Myr timescales. From these simulations, the influence of planetary eccentricity on the system is determined, and a comparison made to previous dynamical models of the planets.

In Chapters 8 and 9, the main findings and conclusions of the thesis are summarised and discussed. A short section giving details of the current and near-future work being undertaken on the basis of this thesis is also provided.
The physical parameters, excitation and chemistry of the rim, jets and knots of the planetary nebula NGC 7009
Creators: name: Goncalves, Denise R.
name: Corradi, Romano L. M.
name: Mampaso, Antonio
name: Perinotto, Mario
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present long-slit optical spectra along the major axis of the planetary nebula NGC 7009. These data allow us to discuss the physical, excitation and chemical properties of all the morphological components of the nebula, including its remarkable systems of knots and jets. The main results of this analysis are the following: i) the electron temperature throughout the nebula is remarkably constant, T_e[OIII] = 10200K; ii) the bright inner rim and inner pair of knots have similar densities of N_e = 6000cm^{-3}, whereas a much lower density of N_e = 1500cm^{-3} is derived for the outer knots as well as for the jets; iii) all the regions (rim, inner knots, jets and outer knots) are mainly radiatively excited; and iv) there are no clear abundance changes across the nebula for He, O, Ne, or S. There is a marginal evidence for an overabundance of nitrogen in the outer knots (ansae), but the inner ones (caps) and the rim have similar N/H values that are at variance with previous results. Our data are compared to the predictions of theoretical models, from which we conclude that the knots at the head of the jets are not matter accumulated during the jet expansion through the circumstellar medium, neither can their origin be explained by the proposed HD or MHD interacting-wind models for the formation of jets/ansae, since the densities as well as the main excitation mechanisms of the knots, disagree with model predictions.
description: Figure 1 was changed because features were misidentified in the previous version. 17 pages including 5 figures and 3 tables. ApJ in press. Also available at http://www.iac.es/galeria/denise/
Hard-loop dynamics of non-abelian plasma instabilities
Creators: name: Strickland, Michael
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: I discuss recent advances in the understanding of non-equilibrium gauge field dynamics in plasmas which have particle distributions which are locally anisotropic in momentum space. In contrast to locally isotropic plasmas such anisotropic plasmas have a spectrum of soft unstable modes which are characterized by exponential growth of transverse (chromo)-magnetic fields at short times. The long-time behavior of such instabilities depends on whether or not the gauge group is abelian or non-abelian. Here I will report on recent numerical simulations which attempt to determine the long-time behavior of an anisotropic non-abelian plasma within hard-loop effective theory.
description: 4 pages, 1 figure; Contribution to proceedings of Quark Matter 2005, Budapest, Hungary, Aug 4-9 2005
No Massive Companion to the Coherent Radio-Emitting M Dwarf GJ 1151
Creators: name: Pope, Benjamin J. S.
name: Bedell, Megan
name: Callingham, Joseph R.
name: Vedantham, Harish K.
name: Snellen, Ignas A. G.
name: Price-Whelan, Adrian M.
name: Shimwell, Timothy W.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The recent detection of circularly polarized, long-duration (>8 hr) low-frequency (~150 MHz) radio emission from the M4.5 dwarf GJ 1151 has been interpreted as arising from a star-planet interaction via the electron cyclotron maser instability. The existence or parameters of the proposed planets have not been determined. Using 20 new HARPS-N observations, we put 99th-percentile upper limits on the mass of any close companion to GJ 1151 at Msini < 5.6 M earth. With no stellar, brown dwarf, or giant planet companion likely in a close orbit, our data are consistent with detected radio emission emerging from a magnetic interaction between a short-period terrestrial-mass planet and GJ 1151.
Reionisation, chemical enrichment and seed black holes from the first stars: is Population III important?
Creators: name: Ricotti, Massimo
name: Ostriker, Jeremiah P.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate the effects of a top-heavy stellar initial mass function on the reionisation history of the intergalactic medium (IGM). We use cosmological simulations that include self-consistently the feedback from ionising radiation, H_2 dissociating radiation and supernova (SN) explosions. We find that it is difficult to reionise the IGM at z_rei>10 with stellar sources even after making extreme assumptions. If star formation in 10^9 M_\odot galaxies is not suppressed by SN explosions, the optical depth to Thomson scattering is tau_e< 0.13. If we allow for the normal energy input from SNe or if pair-instability SNe are dominant, we find taue<0.09. Assuming normal yields for the first stars (popIII), the mean metallicity of the IGM is already Z/Z_\odot=2x10^-3 (10^-3260 M_\odot, they collapse directly onto black holes without exploding as SNe.If metal-poor stars are initially important and collapse to black holes is the typical outcome, then the secondary emission of ionising radiation from accretion on SN induced seed black holes, might be more important than the primary emission. Surprisingly, including feedback effects, we estimate that a warm dark matter scenario (with particle mass of 1.25 keV) reduces tau_e by only approximately 10%.[abridged]
description: Accepted for publication in MNRAS. 13 pages, including 9 figures and 2 tables
Generating survival times with time-varying covariates using the Lambert W Function
Creators: name: Ngwa, Julius S.
name: Cabral, Howard J.
name: Cheng, Debbie M.
name: Gagnon, David R.
name: LaValley, Michael P.
name: Cupples, L. Adrienne
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Computational Biology

description: Simulation studies provide an important statistical tool in evaluating survival methods, requiring an appropriate data-generating process to simulate data for an underlying statistical model. Many studies with time-to-event outcomes use the Cox proportional hazard model. While methods for simulating such data with time-invariant predictors have been described, methods for simulating data with time-varying covariates are sorely needed. Here, we describe an approach for generating data for the Cox proportional hazard model with time-varying covariates when event times follow an Exponential or Weibull distribution. For each distribution, we derive a closed-form expression to generate survival times and link the time-varying covariates with the hazard function. We consider a continuous time-varying covariate measured at regular intervals over time, as well as time-invariant covariates, in generating time-to-event data under a number of scenarios. Our results suggest this method can lead to simulation studies with reliable and robust estimation of the association parameter in Cox-Weibull and Cox-Exponential models.
Poverty Among Children and Elderly
Creators: name: McGranahan, David
name: McGranahan, David
Publisher: name: Unknown
Year: 1985
Subjects: Consumer/Household Economics
Food Security and Poverty

description: The Nation's overall poverty rate increased from 12.1 percent in 1969 to 15.2 percent in 1983. In nonmetropolitan areas, poverty rates were 17 percent in both 1969 and 1983. Underlying poverty rates for children and elderly changed markedly, however. Poverty among the elderly decreased, especially in nonmetro areas, while poverty among children rose.
Atomistic mechanisms for the ordered growth of Co nano-dots on Au(788): comparison of VT-STM experiments and multi-scaled calculations
Creators: name: Rohart, Stanislas
name: Baudot, Gregory
name: Repain, Vincent
name: Girard, Yann
name: Rousset, Sylvie
name: Bulou, Herve
name: Goyhenex, Christine
name: Proville, Laurent
Publisher: name: arXiv
Year: 2004
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Hetero-epitaxial growth on a strain-relief vicinal patterned substrate has revealed unprecedented 2D long range ordered growth of uniform cobalt nanostructures. The morphology of a Co sub-monolayer deposit on a Au(111) reconstructed vicinal surface is analyzed by Variable Temperature Scanning Tunneling Microscopy (VT-STM) experiments. A rectangular array of nano-dots (3.8 nm x 7.2 nm) is found for a particularly large deposit temperature range lying from 60 K to 300 K. Although the nanodot lattice is stable at room temperature, this paper focus on the early stage of ordered nucleation and growth at temperatures between 35 K and 480 K. The atomistic mechanisms leading to the nanodots array are elucidated by comparing statistical analysis of VT-STM images with multi-scaled numerical calculations combining both Molecular Dynamics for the quantitative determination of the activation energies for the atomic motion and the Kinetic Monte Carlo method for the simulations of the mesoscopic time and scale evolution of the Co submonolayer.
What Drives the Distribution of Rural Doctors?
Creators: name: Dudensing, Rebekka
name: Carpenter, Craig W.
name: Liu, Jyh C.
name: Dudensing, Rebekka
name: Carpenter, Craig W.
name: Liu, Jyh C.
Publisher: name: Unknown
Year: 2018
Subjects: subject: Community/Rural/Urban Development
subject: Health Economics and Policy
subject: rural healthcare
subject: rural development
subject: rural doctors
subject: rural hospitals

description: A number of media stories document a “shortage” of doctors in rural communities. The distribution of primary care physicians (PCP) is remarkably similar to the distribution of other services, including grocery stores, suggesting the role of regional economic factors in determining doctor location. This national study examines variables associated with the number of PCP per 100,000 people at the county level. Demographic factors significantly associated with the PCP rate include population density, the share of the population living outside urban cluster or urbanized areas, and the share of Hispanic residents. Economic factors include post-secondary education, out-commuting, the share of the workforce in agriculture and natural resource industries, employer law establishments per 100,000 people, and the presence of broadband. Being located in a Medicaid expansion state was the only significant insurance-related variable, but significance was sensitive to how expansion status was determined. Results suggest that decision makers should be cognizant of the role of economic changes in affecting, as well as reflecting, changes in the healthcare sector.
A Mystery in Chamaeleon: Serendipitous Discovery of a Galactic Symbiotic Nova
Creators: name: Lancaster, Lachlan
name: Greene, Jenny
name: Ting, Yuan-Sen
name: Koposov, Sergey E.
name: Pope, Benjamin J. S.
name: Beaton, Rachael L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the serendipitous discovery of a low luminosity nova occurring in a symbiotic binary star system in the Milky Way. We lay out the extensive archival data alongside new follow-up observations related to the stellar object V$^*$ CN Cha in the constellation of Chamaeleon. The object had long period ($\sim\! 250\,$day), high amplitude ($\sim\! 3\,$mag) optical variability in its recent past, preceding an increase in optical brightness by $\sim\! 8\,$magnitudes and a persistence at this luminosity for about 3 years, followed by a period of $\sim\! 1.4\,{\rm mag}\,{\rm yr}^{-1}$ dimming. The object's current optical luminosity seems to be dominated by H$α$ emission, which also exhibits blue-shifted absorption (a P-Cygni-like profile). After consideration of a number of theories to explain these myriad observations, we determine that V$^*$ CN Cha is most likely a symbiotic (an evolved star-white dwarf binary) system which has undergone a long-duration, low luminosity, nova. Interpreted in this way, the outburst in V$^*$ CN Cha is among the lowest luminosity novae ever observed.
description: Submitted to AJ, 19 pages, 9 figure
An Investigation into Energy Efficient Laboratory Equipments Freezers & Autoclaves
Creators: name: Ma, Cheng-Li Jerry
name: Koochakyazdi, Sousan
name: Tang, Weihan
name: Zhang, Frank
Publisher: name: The University of British Columbia
Year: 2010

description: Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”
title: Parents' and Childrens' Engagement When Sharing Personalised Books
Creators: name: Kucirkova, Natalia
Publisher: name: The Open University
Year: 2011

description: This study aimed to compare parents’ and children’s engagement during shared book reading of a personalised, non-personalised and a favourite book. A within-subjects comparison of seven native English parents and their children aged between 12 and 33 months was performed, with a multi-method design in order to cross-validate the findings. Data from parents’ questionnaire reports, interviews and field notes, indicated high levels of children’s engagement with the personalised books. Video observations showed higher specific engagement levels for children when comparing the personalised with nonpersonalised book and for parents also with the child’s favourite book. There was most correspondence between parents’ and children’s engagement in the personalised book condition. The results suggest that personalised books foster a joint, specific engagement in parents and children and this is probably due to the personal information they contain. A multimethod assessment proved to be an effective technique to adequately address the multifaceted nature of parents’ and children’s engagement in sharing different types of books.
Trididemnum pusillum Kott 2004, sp. nov.
Creators: name: Kott, Patricia
Publisher: name: Zenodo
Year: 2004
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Ascidiacea
Enterogona
Didemnidae
Trididemnum
Trididemnum pusillum

description: Trididemnum pusillum sp. nov.
(figure 18)
 Distribution. Type locality: Western Australia (W of Port Hedland 40 m, coll. T. S. Ward, 5 December 1982, holotype NTM E32).
 Description. The newly recorded colonies are fleshy plates, spicules being present at the surface but sparse elsewhere, although a thin layer lines the common cloacal cavity. The posterior abdominal common cloacal cavity isolates zooids from the fleshy basal or central test (in some elevated domes or ridges). Spicules are stellate to 0.08 mm diameter, with 9–11 conical rays (sometimes with chisel-shaped tips) in optical transverse section.
Zooids are small, but have a long thin retractor muscle, black squamous epithelium and an endostylar pigment cap. Branchial siphons have six pointed lobes around the aperture and atrial siphons are postero-dorsal, with a plain rimmed aperture. Eight coils of the vas deferens surround the undivided testis. Larvae are not known.
 Remarks. The particularly small zooids and the spicules resemble those of T. vahaereere Monniot and Monniot, 1987, although chisel-shaped tips have not been reported on the spicule rays of either T. vahaereere or the related T. tomarahi Monniot and Monniot, 1987. Both these species are further distinguished from the present one by their brittle colonies with spicules crowded throughout and the absence of posterior abdominal common cloacal cavities.
 Other Trididemnum species with spicules mainly in a surface layer and lining a posterior abdominal common cloacal cavity are the tropical T. areolatum (Herdman, 1906) with more spicule rays, the temperate T. amiculum Kott, 2001 with larger spicules to 0.1 mm and larger zooids, and T. nobile Kott, 2001 with large complex colonies and larger zooids.
description: Published as part of Kott, Patricia, 2004, New and little-known species of Didemnidae (Ascidiacea, Tunicata) from Australia (part I), pp. 731-774 in Journal of Natural History 38 (19) on pages 764-765, DOI: 10.1080/00222930310001647334, http://zenodo.org/record/4653689
Trididemnum reticulatum Kott 2004, sp. nov.
Creators: name: Kott, Patricia
Publisher: name: Zenodo
Year: 2004
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Ascidiacea
Enterogona
Didemnidae
Trididemnum
Trididemnum reticulatum

description: Trididemnum reticulatum sp. nov.
(figure 19)
 Distribution. Type locality: Queensland (Slashers Reef—central Great Barrier Reef, reef slope 4 m, coll. AIMS Bioactivity Group, 15 April 1995, holotype QM G308535).
 Description. The colony is a thin (about 3 mm thick), hard sheet, orange in life but dirty beige in preservative owing to a slightly translucent superficial spicule-free bladder cell layer which is about one-tenth of the colony thickness. Beneath the bladder cell layer (at branchial siphon level), spicules are crowded throughout the colony. Except for a small plug of spicules in the lining of each branchial siphon, they are absent over the anterior end of each zooid. When seen from the surface, this interruption of the crowded spicules by the zooids appears as a network pattern beneath the superficial bladder cell layer. Otherwise there are no special features on this flat, smooth-surfaced colony. The common cloacal cavity is shallow, at oesophageal level. Spicules are relatively small (to 0.04 mm diameter), some globular to burr-like, with flat, rounded or irregular ray tips and others with thicker rays and rosette-like groups of small bumps on the broad, flat tips. Occasionally broken spicules appear to be hollow.
Contracted zooids are small (to about 1 mm long). Branchial lobes are short and sharply pointed. Short, cylindrical atrial siphons project from the middle of each thorax. A fine, tapering retractor muscle projects from halfway down the oesophageal neck. The gut forms a double loop. The pointed conical testis has eight coils of the vas deferens around it.
Larvae, in the basal test, have a trunk 0.5 mm long, with the tail wound about three-quarters of the way around it. Four club-shaped ectodermal ampullae are along each side of only two antero-median adhesive organs on long cylindrical stalks.
 Remarks. The species is unusual in its globular and burr-like spicules which are seldom found in this genus, the exceptions being the spicules of T. miniatum Kott, 1977 and T. spumosum Kott, 2001 which are smaller (to 0.02 and 0.03 mm diameter, respectively). Both these species have different colonies from the present species, although T. miniatum does has a similar arrangement of its spicules, which are not present over the anterior ends of the zooids. However, its colonies are small, soft cushions and it has green cell symbionts embedded in the test. Larvae also are unusual in having only two adhesive organs (as in the small larva of T. cyclops, see Kott, 2001).
description: Published as part of Kott, Patricia, 2004, New and little-known species of Didemnidae (Ascidiacea, Tunicata) from Australia (part I), pp. 731-774 in Journal of Natural History 38 (19) on pages 765-766, DOI: 10.1080/00222930310001647334, http://zenodo.org/record/4653689