cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Deployment and Evaluation of a Flexible Human-Robot Collaboration Model Based on AND/OR Graphs in a Manufacturing Environment
Creators: name: Murali, Prajval Kumar
name: Darvish, Kourosh
name: Mastrogiovanni, Fulvio
Publisher: name: arXiv
Year: 2020
Subjects: subject: Robotics (cs.RO)
subject: Artificial Intelligence (cs.AI)
subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: The Industry 4.0 paradigm promises shorter development times, increased ergonomy, higher flexibility, and resource efficiency in manufacturing environments. Collaborative robots are an important tangible technology for implementing such a paradigm. A major bottleneck to effectively deploy collaborative robots to manufacturing industries is developing task planning algorithms that enable them to recognize and naturally adapt to varying and even unpredictable human actions while simultaneously ensuring an overall efficiency in terms of production cycle time. In this context, an architecture encompassing task representation, task planning, sensing, and robot control has been designed, developed and evaluated in a real industrial environment. A pick-and-place palletization task, which requires the collaboration between humans and robots, is investigated. The architecture uses AND/OR graphs for representing and reasoning upon human-robot collaboration models online. Furthermore, objective measures of the overall computational performance and subjective measures of naturalness in human-robot collaboration have been evaluated by performing experiments with production-line operators. The results of this user study demonstrate how human-robot collaboration models like the one we propose can leverage the flexibility and the comfort of operators in the workplace. In this regard, an extensive comparison study among recent models has been carried out.
South Korean Public Preferences for Genetically Modified Foods: A Random-Parameter Model
Creators: name: Onyango, Benjamin M.
name: Govindasamy, Ramu
name: Onyango, Benjamin M.
name: Govindasamy, Ramu
Publisher: name: Unknown
Year: 2005
Subjects: Consumer/Household Economics

description: Food biotechnology promises to deliver a wide range of enhanced consumer benefits. This study models consumer's willingness to trade-off the potential risks of GM foods with the possibility of extracting significant benefits. It estimates the marginal effects and relationships between product characteristics and consumer attributes on acceptance of GM foods for South Korea.
Monitoring of Sudden Ionospheric Disturbances (SID) from Kolkata (INDIA)
Creators: name: Chakrabarti, Sandip K.
name: Acharyya, K.
name: Bose, B.
name: Mandal, S.
name: Chatterjee, A.
name: Nandi, N. M.
name: Pal, S.
name: Khan, R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report our first results of monitoring sudden ionospheric disturbances (SID). We present data taken continuously for two weeks during 20th Sept. 2002 and 4th Oct. 2002. We compare the effects of solar flares of the VLF signal with those obtained by GOES Satellite of NASA monitoring in X-rays and found excellent agreement.
description: 4 pages 2 figures
Scheduling Dynamic Software Updates in Mobile Robots
Creators: name: Yaacoub, Ahmed El
name: Mottola, Luca
name: Voigt, Thiemo
name: Rümmer, Philipp
Publisher: name: Universität Regensburg
Year: 2023
Subjects: subject: Dynamic software updates, mobile robotics, safety-critical systems, aerial drones
subject: 004 Informatik

description: We present NeRTA (Next Release Time Analysis), a technique to enable dynamic software updates for low-level control software of mobile robots. Dynamic software updates enable software correction and evolution during system operation. In mobile robotics, they are crucial to resolve software defects without interrupting system operation or to enable on-the-fly extensions. Low-level control software for mobile robots, however, is time sensitive and runs on resource-constrained hardware with no operating system support. To minimize the impact of the update process, NeRTA safely schedules updates during times when the computing unit would otherwise be idle. It does so by utilizing information from the existing scheduling algorithm without impacting its operation. As such, NeRTA works orthogonal to the existing scheduler, retaining the existing platform-specific optimizations and fine-tuning, and may simply operate as a plug-in component. To enable larger dynamic updates, we further conceive an additional mechanism called bounded reactive control and apply mixed-criticality concepts. The former cautiously reduces the overall control frequency, whereas the latter excludes less critical tasks from NeRTA processing. Their use increases the available idle times. We combine real-world experiments on embedded hardware with simulations to evaluate NeRTA. Our experimental evaluation shows that the difference between NeRTA’s estimated idle times and the measured idle times is less than 15% in more than three-quarters of the samples. The combined effect of bounded reactive control and mixed-criticality concepts results in a 150+% increase in available idle times. We also show that the processing overhead of NeRTA and of the additional mechanisms is essentially negligible.
Der Ökumenische Rat der evangelischen Kirchen in Ungarn und seine Arbeit
Creators: name: Pákozdy, Ladislaus Martin
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 8 Nr. 1 (1959): Ökumenische Rundschau, Band 8, Heft 1
Isolation and characterization of the major fraction of flaxseed proteins
Creators: name: Chung, Mavis W. Y.
Publisher: name: University of British Columbia
Year: 2009

description: Flaxseed has not been well characterized in terms of the physicochemical and functional properties of its constituent proteins. This information is essential for its utilization. The major fraction of flaxseed proteins was isolated and characterized in this study. Proteins from NorMan flaxseeds were extracted with 0.10 M NaCl in 0.10 M Tris at pH 8.6 and fractionated by DEAE-Sephacel anion-exchange chromatography. The major protein fraction was eluted at 0.25 M NaCl and comprised 63.7 % of the total proteins. The gel electrophoretic profiles, isoelectric points, sulfhydryl and disulfide groups, and amino acid composition of the major fraction were investigated. In addition, the surface hydrophobicity, apparent viscosity, solubility and foaming properties of the major fraction in buffer conditions with two NaCl concentrations (0.01 or 1.0 M) at three pHs (3, 5 or 7) were examined. At least six different size classes of polypeptides, with predominant components having molecular weights of 20 ± 1, 26 ± 2 and 31 ± 1 kDa, were observed for the major fraction in reducing SDS-PAGE. The fraction had a high content of disulfide linkages but low content of sulfhydryl groups. Similar to the storage globulin of other oilseeds, it had high level of arginine, glutamate (and/or glutamine) and aspartate (and/or asparagine). The isoelectric points of three components in the major fraction separated by isoelectric focusing were 4.7 ± 0.0, 5.1 ± 0.0, and 5.6 ± 0.1. Its surface hydrophobicity (S0) measured by the PRODAN fluorescent probe was significantly affected by pH and NaCl concentrations. S0 increased with the addition of NaCl and increased in pH. The major fraction showed a typical U-shaped solubility curve as a function of pH at low NaCl concentration while addition of NaCl broadened and shifted the region of minimal solubility to the acidic side. The fraction had foaming properties comparable to that of a commercial egg albumen powder in 0.01 M NaCl at pH 7 and it had the densest and most stable foam in the same buffer at pH 3. Results from this thesis serve as a basis for more in-depth characterization of the major fraction of flaxseed proteins.
D-wave baryon resonances with charm from coupled-channel dynamics
Creators: name: Hofmann, J.
name: Lutz, M. F. M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Identifying the zero-range exchange of vector mesons as the driving force for the s-wave scattering of pseudo-scalar mesons off the baryon ground states, the spectrum of ${3/2}^-$ molecules is computed. We predict a strongly bound 15-plet of $C=-1$ states. A narrow crypto-exotic octet of charm-zero states is foreseen. In the $C=+1$ sector a sextet of narrow resonances is formed due to the interaction of D mesons with the baryon decuplet. A strongly bound triplet of double-charm states is a consequence of coupled-channel dynamics driven by the D mesons.
description: 38 pages
Supermarketization of the "Emerging Markets" of the Pacific Rim: Development and Trade Implications
Creators: name: Reardon, Thomas
name: Berdegue, Julio A.
name: Timmer, C. Peter
name: Reardon, Thomas
name: Berdegue, Julio A.
name: Timmer, C. Peter
Publisher: name: Unknown
Year: 2005
Subjects: Agribusiness

description: There has been extremely rapid transformation in the past decade of the food retail sector, embodied in the rapid spread of supermarkets, in East and Southeast Asia and Latin America-the emerging markets of the Pacific Rim region. As the supermarket sector develops, leading chains are rapidly adopting technological, organizational, and institutional changes in their product-procurement systems. These changes alter the market that farmers face and have the potential to substantially transform the nature, composition, and volume of trade in the region. These trends in turn present both opportunities and challenges for development that require careful program and policy attention.
Spin-orbit interaction of light in three-dimensional microcavities
Creators: name: Kreismann, Jakob
name: Hentschel, Martina
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We investigate the spin-orbit coupling of light in three-dimensional cylindrical and tube-like whispering gallery mode resonators. We show that its origin is the transverse confinement of light in the resonator walls, even in the absence of inhomogeneities or anisotropies. The spin-orbit interaction results in elliptical far-field polarization (spin) states and causes spatial separation of polarization handedness in the far field. The ellipticity and spatial separation are enhanced for whispering gallery modes with higher excitation numbers along the resonator height. We analyze the asymmetry of the ellipticity and the tilt of the polarization orientation in the far field of cone-like microcavities. Furthermore, we find a direct relationship between the tilt of the polarization orientation in the far field and the local inclination of the resonator wall. Our findings are based on FDTD-simulations and are supported by three-dimensional diffraction theory.
description: 18 pages, 6 figures
Spin gapless semiconductors
Creators: name: Yue, Zengji
name: Li, Zhi
name: Sang, Lina
name: Wang, Xiaolin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Spin gapless semiconductors (SGSs) are a new class of zero gap materials which have a fully spin polarised electrons and holes. They bridge zero gap materials and half-metals. The band structures of the SGSs can have two types of energy dispersions: Dirac linear dispersion and parabolic dispersion. The Dirac type SGSs exhibit fully spin polarized Dirac cones, and offer a platform for massless and fully spin polarized spintronics as well as dissipationless edge state via quantum anomalous Hall effect. Due to its fascinating spin and charge states, they hold great potential application in spintronics. There have been tremendous efforts worldwide on searching for suitable candidates of SGSs. In particularly, there is an increasing interest in searching for Dirac type SGSs. In the past decade, a large number of Dirac or parabolic type SGSs have been predicted by density functional theory and some of parabolic SGSs have been experimentally demonstrated. The SGSs hold great potential for high speed and low-energy consumption spintronics, electronics and optoelectronics. Here, we review both Dirac and parabolic types of SGSs in different materials systems and outline the concepts of SGSs, novel spin and charge states, and potential applications of SGSs in next generation spintronic devices.
description: Small in press. Submitted on September 10, 2019, Accepted on May 6, 2020
Casimir effect in conformally flat spacetimes
Creators: name: Markowicz, Bartosz
name: Dębski, Kacper
name: Kolanowski, Maciej
name: Kamiński, Wojciech
name: Dragan, Andrzej
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We discuss several approaches to determine the Casimir force in inertial frames of reference in different dimensions. On an example of a simple model involving mirrors in Rindler spacetime we show that Casimir's and Lifschitz's methods are inequivalent and only latter can be generalized to other spacetime geometries. For conformally coupled fields we derive the Casimir force in conformally flat spacetimes utilizing an anomaly and provide explicit examples in the Friedmann-Lemaitre-Robertson-Walker $(k=0)$ models.
description: (21 pages, 1 figure)
Chemical telemetry of OH observed to measure interstellar magnetic fields
Creators: name: Viti, S.
name: Hartquist, T. W.
name: Myers, P. C.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present models for the chemistry in gas moving towards the ionization front of an HII region. When it is far from the ionization front, the gas is highly depleted of elements more massive than helium. However, as it approaches the ionization front, ices are destroyed and species formed on the grain surfaces are injected into the gas phase. Photodissociation removes gas phase molecular species as the gas flows towards the ionization front. We identify models for which the OH column densities are comparable to those measured in observations undertaken to study the magnetic fields in star forming regions and give results for the column densities of other species that should be abundant if the observed OH arises through a combination of the liberation of H2O from surfaces and photodissociation. They include CH3OH, H2CO, and H2S. Observations of these other species may help establish the nature of the OH spatial distribution in the clouds, which is important for the interpretation of the magnetic field results.
description: 11 pages, 2 figures, accepted by Astrophysics and Space Science
Linear, nonlinear and transitional regimes of second mode instability
Creators: name: Unnikrishnan, S.
name: Gaitonde, Datta V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: The 2D second-mode is a potent instability in hypersonic boundary layers (HBLs). We study its linear and nonlinear evolution, followed by its role in transition and eventual breakdown of the HBL into a fully turbulent state. Linear stability theory (LST) is utilized to identify the second-mode wave through FS-synchronization, which is then recreated in linearly and nonlinearly forced 2D direct numerical simulations (DNSs). The nonlinear DNS shows saturation of the fundamental frequency, and the resulting superharmonics induce tightly braided ``rope-like'' patterns near the generalized inflection point (GIP). The instability exhibits a second region of growth constituted by the fundamental frequency, downstream of the primary envelope, which is absent in the linear scenario. Subsequent 3D DNS identifies this region to be crucial in amplifying oblique instabilities riding on the 2D second-mode ``rollers''. This results in lambda vortices below the GIP, which are detached from the ``rollers'' in the inner boundary layer. Streamwise vortex-stretching results in a localized peak in length-scales inside the HBL, eventually forming haripin vortices. Spectral analyses track the transformation of harmonic peaks into a turbulent spectrum, and appearance of oblique modes at the fundamental frequency, which suggests that fundamental resonance is the most dominant mechanism of transition. Bispectrum reveals coupled nonlinear interactions between the fundamental and its superharmonics leading to spectral broadening, and traces of subharmonic resonance as well.
Hoiho tracking: 23 July - 20 August 2020
Creators: name: Mattern, Thomas
Publisher: name: figshare
Year: 2020
Subjects: subject: Marine Biology
subject: Ecology
subject: FOS: Biological sciences
subject: 60201 Behavioural Ecology
subject: 60205 Marine and Estuarine Ecology (incl. Marine Ichthyology)
subject: 60207 Population Ecology

description: Hoiho tracking suffered several setbacks in the past four weeks. Despite substantial effort with daily monitoring of the Bobby’s Head colony, we could not recover the device from male hoiho 982000365942039. There are two possible explanations for this, either the bird did not return to the site during the nearly three weeks of constant evening surveillance or the penguin removed the device making it impossible to identify the bird without getting a transponder reading. Automatic surveillance of the site up until mid-August revealed very little penguin traffic at the site; trail cameras were removed from Bobby’s Head on 9 August. The device is now considered loss which left our team with a device pool of four units. Further deployments were planned at Haywards Point in the Catlins. These were to be the last deployments before conclusion of the project. Deployments were delayed with the recurrence of Covid-19 in Auckland, and the uncertainty whether the South Island would return to a lockdown level that would prevent recovery of devices. After level-2 was announced for the South Island, the Haywards Point colony was visited on the third weekend of August. Plan was to fit devices to pairs to investigate whether cooperative foraging as observed at Bobby’s Head may be a common occurrence. However, once in the field, three of the four units malfunctioned which we are currently investigating with TechnoSmart. As a result, only a single individual could be fitted with GPS dive logger. In the evening of 15 August, male hoiho 982000405532334 was captured and the last reliable device deployed; the bird weighed 5.8 kg. Two other birds were seen that night. However, neither appeared to be the captured penguin’s partner, so we decided against fitting devices that were unlikely to record data reliably. Beyond field work, analysis of dive data progressed further with 80% of all dive data now processed.
The Horn and the Thermal Model
Creators: name: Cleymans, J.
name: Oeschler, H.
name: Redlich, K.
name: Wheaton, S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The recently discovered sharp peak in the K+/pi+ ratio in relativistic heavy-ion collisions is discussed in the framework of the thermal model. In this model a rapid change is expected as the hadronic gas undergoes a transition from a baryon-dominated to a meson-dominated gas. The transition occurs at a temperature T = 140 MeV and baryon chemical potential muB = 410 MeV corresponding to an incident energy of 8.2 GeV.
description: 4 pages, 3 figures. ICPAQG5, Kolkata, India
GEMOFILIYA KASSALLIGI HAQIDA.
Creators: name: Yo'ldasheva, Zuxraxon
name: Dadaboyev, Dilshodbek
name: Isojonov, Yusufjon
Publisher: name: Zenodo
Year: 2024

description: Ushbu maqolada bugungi kunda ayrim insonlarda uchrab turadigan irsiy kasallik hisoblangan gemofiliya haqida ma’lumot berilgan.
Additional file 1 of Early shell field morphogenesis of a patellogastropod mollusk predominantly relies on cell movement and F-actin dynamics
Creators: name: Weihong Yang
name: Huan, Pin
name: Baozhong Liu
Publisher: name: figshare
Year: 2020
Subjects: subject: Biophysics
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Cell Biology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Developmental Biology
subject: Cancer
subject: Inorganic Chemistry

description: Additional file 1: Figure S1. Expression of pSF genes in early embryos. The anterior/animal pole is on the top for each panel. The dorsal and ventral sides are difficult to discriminate at 3 and 4 hpf. Posttrocal expression of the genes (arrows) started at 5 hpf for BMP2/4, GATA2/3 and Hox1, while the earliest Engrailed expression was detected in dorsal cells at 4 hpf (k, which was used to determine the dorsal and ventral sides of the embryo). Pretrochal BMP2/4 expression was constantly detected at the stages investigated (arrowheads in a-c).
Additional file 2 of Early shell field morphogenesis of a patellogastropod mollusk predominantly relies on cell movement and F-actin dynamics
Creators: name: Weihong Yang
name: Huan, Pin
name: Baozhong Liu
Publisher: name: figshare
Year: 2020
Subjects: subject: Biophysics
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Cell Biology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Developmental Biology
subject: Cancer
subject: Inorganic Chemistry

description: Additional file 2: Figure S2. No evident cell proliferation in the shell field from 6 to 8 hpf. Similar to Fig. 4, all panels were optical sections collected by an laser confocal microscope (note that the dorsal and ventral sides are different from those in Fig. 4). BrdU was added at 6 hpf and the samples were collected at 8 hpf. The incorporation of BrdU (green fluorescence) indicates the divided cells during this period. No evident cell proliferations was detected in the shell field (sf). D, dorsal; V, ventral. Bar represents 20 μm.
Approximate Linear Time ML Decoding on Tail-Biting Trellises in Two Rounds
Creators: name: Krishnan, K. Murali
name: Shankar, Priti
Publisher: name: arXiv
Year: 2006
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: A linear time approximate maximum likelihood decoding algorithm on tail-biting trellises is prsented, that requires exactly two rounds on the trellis. This is an adaptation of an algorithm proposed earlier with the advantage that it reduces the time complexity from O(mlogm) to O(m) where m is the number of nodes in the tail-biting trellis. A necessary condition for the output of the algorithm to differ from the output of the ideal ML decoder is reduced and simulation results on an AWGN channel using tail-biting rrellises for two rate 1/2 convoluational codes with memory 4 and 6 respectively are reported
Hoiho tracking: 23 July - 20 August 2020
Creators: name: Mattern, Thomas
Publisher: name: figshare
Year: 2020
Subjects: subject: Marine Biology
subject: Ecology
subject: FOS: Biological sciences
subject: 60201 Behavioural Ecology
subject: 60205 Marine and Estuarine Ecology (incl. Marine Ichthyology)
subject: 60207 Population Ecology

description: Hoiho tracking suffered several setbacks in the past four weeks. Despite substantial effort with daily monitoring of the Bobby’s Head colony, we could not recover the device from female hoiho 982000365942039. There are two possible explanations for this, either the bird did not return to the site during the nearly three weeks of constant evening surveillance or the penguin removed the device making it impossible to identify the bird without getting a transponder reading. Automatic surveillance of the site up until mid-August revealed very little penguin traffic at the site; trail cameras were removed from Bobby’s Head on 9 August. The device is now considered loss which left our team with a device pool of four units. Further deployments were planned at Haywards Point in the Catlins. These were to be the last deployments before conclusion of the project. Deployments were delayed with the recurrence of Covid-19 in Auckland, and the uncertainty whether the South Island would return to a lockdown level that would prevent recovery of devices. After level-2 was announced for the South Island, the Haywards Point colony was visited on the third weekend of August. Plan was to fit devices to pairs to investigate whether cooperative foraging as observed at Bobby’s Head may be a common occurrence. However, once in the field, three of the four units malfunctioned which we are currently investigating with TechnoSmart. As a result, only a single individual could be fitted with GPS dive logger. In the evening of 15 August, male hoiho 982000405532334 was captured and the last reliable device deployed; the bird weighed 5.8 kg. Two other birds were seen that night. However, neither appeared to be the captured penguin’s partner, so we decided against fitting devices that were unlikely to record data reliably. Beyond field work, analysis of dive data progressed further with 80% of all dive data now processed.
Thick string-like braneworlds in f(T) gravity
Creators: name: Moreira, A. R. P.
name: Silva, J. E. G.
name: Veras, D. F. S.
name: Almeida, C. A. S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We propose a codimension two warped braneworld model within the teleparallel $f(T)$ gravity. By assuming a global vortex as the source, we found a $l=0$ vortex solution that yields to a thick string-like brane. Asymptotically, the bulk geometry converges to an $AdS_6$ spacetime whose cosmological constant is produced by the torsion parameters. Furthermore, the torsion induces an $AdS-dS$ transition on the exterior region. Inside the brane core, the torsion produces an internal structure even for a single complex scalar field. As the torsion parameters vary, the brane undergoes a phase transition leading to the formation of ring-like structures. The bulk-brane Planck mass ration is modified by the torsion. The analysis of the stress energy condition reveals a splitting brane process satisfying the weak and strong energy conditions for some values of the parameters. In addition, we investigate the behaviour of the gravitational perturbations in this scenario. It turns out that the gravitational spectrum has a linear behaviour for small masses and is independent of the torsion parameters for large masses. In the bulk, the torsion keeps a gapless non-localizable and stable tower of massive modes. Inside the brane core the torsion produces new barriers and potential wells leading to small amplitude massive modes and a massless mode localized around the ring structures.
description: 25 pages, 11 figures
Measurement of Exclusive rho+rho- Production in Mid-Virtuality Two-Photon Interactions and Study of the gamma gamma* -> rho rho Process at LEP
Creators: name: L3 Collaboration
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Exclusive rho+rho- production in two-photon collisions between a quasi-real photon, gamma, and a mid-virtuality photon, gamma*, is studied with data collected at LEP at centre-of-mass energies root(s)=183-209GeV with a total integrated luminosity of 684.8pb^-1. The cross section of the gamma gamma* -> rho+ rho- process is determined as a function of the photon virtuality, Q^2, and the two-photon centre-of-mass energy, W_gg, in the kinematic region: 0.2GeV^2 < Q^2 <0.85GeV^2 and 1.1GeV < W_gg < 3GeV. These results, together with previous L3 measurements of rho0 rho0 and rho+ rho- production, allow a study of the gamma gamma* -> rho rho process over the Q^2-region 0.2GeV^2 < Q^2 < 30 GeV^2.
Laser-driven Collisionless Shock Acceleration of Ions from Near-critical plasmas
Creators: name: Tochitsky, S.
name: Pak, A.
name: Fiuza, F.
name: Haberberger, D.
name: Lemos, N.
name: Link, A.
name: Froula, D. H.
name: Joshi, C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: This paper overviews experimental and numerical results on acceleration of narrow energy spread ion beams by an electrostatic collisionless shockwave driven by 1 um (Omega EP) and 10 um (UCLA Neptune Laboratory) lasers in near critical density CH and He plasmas, respectively. Shock waves in CH targets produced high-energy 50 MeV protons (energy spread of <30%) and 314 MeV C6+ ions (energy spread of <10%). Observation of acceleration of both protons and carbon ions to similar velocities is consistent with reflection of particles off the moving potential of a shock front. For shocks driven by CO2 laser in a gas jet, 30 MeV peak in He ion spectrum was detected. Particle-in-cell simulations indicate that regardless of the target further control over its density profile is needed for optimization of accelerated ion beams in part of energy spread, yield and maximum kinetic energy.
description: 16 pages, 7 figures
Incentive Provision and Coordination Costs in Food-Marketing Channels: A Multi-Stage Channel-Agency Theory Perspective
Creators: name: Kuwornu, John K.M.
name: Kuiper, W. Erno
name: Pennings, Joost M.E.
name: Meulenberg, Matthew T.G.
name: Kuwornu, John K.M.
name: Kuiper, W. Erno
name: Pennings, Joost M.E.
name: Meulenberg, Matthew T.G.
Publisher: name: Unknown
Year: 2005
Subjects: Agribusiness

description: Food-supply chains have become extensively vertically coordinated through the use of contracts as an organizational response to satisfy the needs of consumers in the saturated food markets of the industrialized countries. The contracts involved must establish an optimal trade-off between incentive provision and risk reduction. Agency theory can be used to model this trade-off. We show how to do this in a three-stage (producer, wholesaler, retailer) principal-agent supply-chain model. Its application to the Dutch supply chain of ware potatoes shows that during the period 1961-2002, retailers have been able to provide more incentives to the wholesalers and producers and as a consequence the costs of coordination in the supply chain decreased.
On the approximation of the black hole shadow with a simple polar curve
Creators: name: Farah, Joseph R.
name: Pesce, Dominic W.
name: Johnson, Michael D.
name: Blackburn, Lindy L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A black hole embedded within a bright, optically thin emitting region imprints a nearly circular "shadow" on its image, corresponding to the observer's line-of-sight into the black hole. The shadow boundary depends on the black hole's mass and spin, providing an observable signature of both properties via high resolution images. However, standard expressions for the shadow boundary are most naturally parametrized by Boyer-Lindquist radii rather than by image coordinates. We explore simple, approximate parameterizations for the shadow boundary using ellipses and a family of curves known as limacons. We demonstrate that these curves provide excellent and efficient approximations for all black hole spins and inclinations. In particular, we show that the two parameters of the limacon naturally account for the three primary shadow deformations resulting from mass and spin: size, displacement, and asymmetry. These curves are convenient for parametric model fitting directly to interferometric data, they reveal the degeneracies expected when estimating black hole properties from images with practical measurement limitations, and they provide a natural framework for parametric tests of the Kerr metric using black hole images.
description: 9 pages, 9 figures; accepted for publication in ApJ
The Emission Line Properties of Star-forming Galaxies in the WEAVE-LOFAR Survey
Creators: name: Davis, Faye
Publisher: name: UH Research Archive
Year: 2021
Subjects: WEAVE
LOFAR
Spectroscopy
star formation
BPT
emission lines
AGN
MCMC

description: The third operational rehearsal of WEAVE-LOFAR has produced 7273 model optical spectra of radio-selected star-forming galaxies. It is the most realistic simulation of what we expect WEAVE's performance to be. The purpose of this research is to build an algorithm which can reliably extract emission line properties from the model spectra in preparation for the bulk arrival of the WEAVE-LOFAR data by the end of 2020. Spectral fitting software already exists; however, the algorithm described in this thesis has been designed to specifically model simulated WEAVE spectra. The algorithm uses Markov chain Monte Carlo (MCMC) techniques to determine posterior distributions of the emission line parameters, and is designed to accurately model low signal-to-noise (SNR) spectra of radio sources. The data preparation stages and the process of modelling the continuum, dust attenuation and the broad and narrow emission lines are discussed in detail in this thesis. The fundamental aim is to gain an insight into what we expect the real WEAVE data to resemble and understand everything we can prior to its arrival. This thesis presents evidence that reliable emission line diagnostics can be retrieved, even from low SNR spectra, by comparing their flux measurements to the input spectra. These emission line measurements are used to classify the targets into star-forming galaxies or AGN, with an accuracy of 89%. Hα fluxes are dust corrected using the Balmer decrement, from which star formation rates (SFR) are derived and compared to those derived from the SKA simulated skies LOFAR 150 MHz measurements. The purpose of this comparison is to understand how representative the radio derived measurements are of the SFR and whether a strong case can be made to use non-thermal radio continuum as an alternative SFR indicator. Radio surveys are very sensitive, impervious to dust and can survey the sky at fast speeds, therefore the use of this diagnostic will be highly beneficial to star formation research. During the process of this analysis, any complications or limitations presented by the model spectra are thoroughly investigated and reviewed. A potential issue with the flux calibration is highlighted which appears to distort the shape of the continuum, offsets the blue and red arm spectra and results in a 25% systematic offset from the input fluxes. Furthermore, the presence of skyline residuals, particularly at longer wavelengths, showed evidence of poor sky subtraction. Despite these issues, the research in this thesis provides a proof of principle that MCMC-based codes can be used in bulk to classify and recover physical information from WEAVE spectra.
PANEL ESTIMATION OF WATER DEMAND BASED ON AN EPISODE OF RATE REFORM
Creators: name: Moreno, Georgina
name: Sunding, David L.
name: Schoengold, Karina
name: Moreno, Georgina
name: Sunding, David L.
name: Schoengold, Karina
Publisher: name: Unknown
Year: 2004
Subjects: subject: Resource /Energy Economics and Policy
subject: Input demand estimation
subject: water resources
subject: conservation technology

description: Agriculture is by far the dominant user of water in the western United States and in nearly all arid regions of the planet. Despite this fact and despite a growing push to rely on price mechanisms for rationalizing water allocation, there are few econometric studies of agricultural water demand that measure its responsiveness to price. Using a unique panel data set of water use at a disaggregated level, this paper estimates the parameters of an agricultural water demand function. The approach incorporates the notion of "jointness" in the farm production function, which postulates that producers choose inputs, outputs and technology simultaneously. Estimation results indicate that the own-price elasticity of water use is in the range [-0.415, -0.275], which includes the indirect effects of water price changes on output and technology choices. The estimation results also provide the first direct measurement of the conservation benefits of investment in precision irrigation technology. Water savings from technology adoption vary widely by crop but can be as high as 50 percent relative to gravity irrigation.
Heavy Quark Diffusion and Lattice Correlators
Creators: name: Petreczky, P.
name: Petrov, K.
name: Teaney, D.
name: Velytsky, A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study charmonia correlators at finite temperature. We analyze to what extent heavy quarkonia correlators are sensitive to the effect of heavy quark transport and whether it is possible to constrain the heavy quark diffusion constant by lattice calculations. Preliminary lattice calculations of quarkonia correlators performed on anisotropic lattices show that they are sensitive to the effect of heavy quark transport, but much detailed calculations are required to constrain the value of the heavy quark diffusion constant.
description: Based on talks presented on Lattice 2005, Extreme QCD 2005 and Quark Matter 2005, 5 pages, 4 Figures
Dimensions of citizenship among Mexican immigrants in Vancouver, Canada
Creators: name: Rempel, Geoffrey Elliott Lee
Publisher: name: University of British Columbia
Year: 2009

description: The beginning of the twenty-first century is a time of far-reaching global changes; these changes have tremendous implications for the meaning of citizenship. Increasing connections of all kinds across borders and between cultures demand the reevaluation of traditional understandings of the relationship of individuals to the state and to each other in the public sphere. This thesis uses the testimony of Mexican immigrants to Vancouver, Canada, (a largely unresearched group at the forefront of these global changes) to query their experiences of the meaning of citizenship. Semistructured interviews in English and Spanish were conducted with twenty-seven respondents. Three dimensions of citizenship were found to be particularly important to this group. First, these immigrants operate within the structure of neoliberal nation-building projects of both the Mexican and the Canadian states. Two examples of such biopolitical mobilization (the National Solidarity Program in Mexico, and the federal multicultural policy in Canada) are examined in detail. Second, citizenship for Mexican immigrants is transnational; it is characterized by multiple, simultaneous economic, social, and political involvements in both Mexico and Canada. However, the actual extent of such transnationalism was found to be rather more limited than much transnational literature suggests. Third, belonging to a community is a central element of citizenship; these immigrants were found not to form a single cohesive community, but rather multiple, dispersed communities split along lines of class and other identity axes. This research demonstrates the challenges and opportunities that increasingly common hybrid identities present for the meaning and function of citizenship, particularly for an ethnic minority immigrant group maintaining strong ties to their country of origin.
FIRMS, INCENTIVES, AND THE SUPPLY OF FOOD SAFETY: A FORMAL MODEL OF GOVERNMENT ENFORCEMENT
Creators: name: Goldsmith, Peter D.
name: Turan, Nesve A.
name: Gow, Hamish R.
name: Goldsmith, Peter D.
name: Turan, Nesve A.
name: Gow, Hamish R.
Publisher: name: Unknown
Year: 2004
Subjects: Food Consumption/Nutrition/Food Safety

description: Recent instances of significant food safety breeches in both meat and biotechnology challenge traditional safety efforts. A formal model utilizing agency theory is used to explore the power relationships between the regulator and the firm. Fundamental issues effecting firms' supply of safety are demonstrated and alternative corrective mechanisms are discussed.
Flux Compactifications on Projective Spaces and The S-Duality Puzzle
Creators: name: Bouwknegt, P.
name: Evslin, J.
name: Jurco, B.
name: Mathai, V.
name: Sati, H.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We derive a formula for D3-brane charge on a compact spacetime, which includes torsion corrections to the tadpole cancellation condition. We use this to classify D-branes and RR fluxes in type II string theory on RP^3xRP^{2k+1}xS^{6-2k} with torsion H-flux and to demonstrate the conjectured T-duality to S^3xS^{2k+1}xS^{6-2k} with no flux. When k=1, H\neq 0 and so the K-theory that classifies fluxes is twisted. When k=2 the square of the H-flux yields an S-dual Freed-Witten anomaly which is canceled by a D3-brane insertion that ruins the K-theory classification. When k=3 the cube of H is nontrivial and so the D3 insertion may itself be inconsistent and the compactification unphysical. Along the way we provide a physical interpretation for the AHSS in terms of boundaries of branes within branes.
description: 43 pages, 4 eps figures; minor corrections, mostly typos; published version
Additional file 8 of Large-scale discovery of male reproductive tract-specific genes through analysis of RNA-seq datasets
Creators: name: Robertson, Matthew J.
name: Kent, Katarzyna
name: Tharp, Nathan
name: Nozawa, Kaori
name: Dean, Laura
name: Mathew, Michelle
name: Grimm, Sandra L.
name: Zhifeng Yu
name: Légaré, Christine
name: Fujihara, Yoshitaka
name: Ikawa, Masahito
name: Sullivan, Robert
name: Coarfa, Cristian
name: Matzuk, Martin M.
name: Garcia, Thomas X.
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 8: Fig. S3. Venn diagrams comparing the overlap between the candidate male reproductive genes identified by the indicated reproductive tissues. The human testis combined gene list is the list of genes from both new samples we isolated and from previously published testis samples. The human epididymis combined gene list is the list of genes identified in either previously published samples or the newly generated samples across all sections of the epididymis. Lastly, the mouse epididymis combined gene list is the list combined list of genes identified across all three sections of the mouse epididymis.
Evolution of the Black Hole - Bulge Relationship in QSOs
Creators: name: Shields, G. A.
name: Salviander, S.
name: Bonning, E. W.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: QSOs allow study of the evolution of the relationship between black holes in galactic nuclei and their host galaxies. The black hole mass can be derived from the widths of the broad emission lines, and the stellar velocity dispersion (sigma_*) of the host galaxy can be inferred from the narrow emission lines. Results based on [OIII] and [OII] line widths indicate that the black hole mass - sigma_* relationship, at redshifts up to z ~ 2, is consistent with no evolution or an increase of up to ~ 0.5 dex in black hole mass at fixed sigma_*. CO line widths offer an estimate of sigma_* for luminous QSOs at high redshifts. The available objects from z ~ 4 to 6 have very massive black holes, \~ 10^9.5 M_sun, but their CO line widths suggest much smaller host galaxies than would be expected by the local black hole mass - sigma_* relationship. The most massive black holes must continue to reside in comparatively modest galaxies today, because their number density inferred from QSO statistics exceeds the present-day abundance of proportionally massive galaxies.
description: 5 pages, 2 figures, uses elsart3.cls, to appear in the proceedings of "QSO Host Galaxies: Evolution and Environment", P.D. Barthel & D.B. Sanders, eds., New Astronomy Reviews, 2006
Additional file 7 of Large-scale discovery of male reproductive tract-specific genes through analysis of RNA-seq datasets
Creators: name: Robertson, Matthew J.
name: Kent, Katarzyna
name: Tharp, Nathan
name: Nozawa, Kaori
name: Dean, Laura
name: Mathew, Michelle
name: Grimm, Sandra L.
name: Zhifeng Yu
name: Légaré, Christine
name: Fujihara, Yoshitaka
name: Ikawa, Masahito
name: Sullivan, Robert
name: Coarfa, Cristian
name: Matzuk, Martin M.
name: Garcia, Thomas X.
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 7: Fig. S2. Summary of number of statistically significant up and down-regulated genes, and quantification of candidate genes with respect to the individual reproductive tissue or cell of interest. The plots in panels (A) and (B) summarizes the number of statistically significant human or mouse genes respectively, that are up-regulated or down-regulated in each reproductive tissue or cell of interest compared to the non-reproductive tissue with maximal gene expression. Red columns depict the number genes that are up-regulated and blue columns depict the number genes that are down-regulated. Changes in gene expression were considered statistically significant for an FDR of less than or equal to 0.05. The total number of candidate genes are designated by the black columns. Candidate genes are genes that passed the FDR and TPM expression value filters.
EFFICIENCY OF FOREST COMMODITY FUTURES MARKETS
Creators: name: He, Dequan
name: Holt, Matthew T.
name: He, Dequan
name: Holt, Matthew T.
Publisher: name: Unknown
Year: 2004
Subjects: subject: Marketing
subject: FOS: Economics and business

description: Market efficiency and unbiasedness tests are performed for the first time for three forest commodity futures markets: softwood lumber, oriented strand board (OSB), and northern bleached softwood kraft pulp (NBSK). The Johansen cointegration procedure is applied to test long-term market efficiency, while the standard error correction models (ECM) and ECM with GQARCH-in-mean process are also used to examine short-term market efficiency and unbiasedness. Results show that these markets are inefficient and biased in both the long-term and short-term. Results also indicate that no short-term time-varying risk premiums are found in these commodity futures markets.
Wave and Particle Scattering Properties of High Speed Black Holes
Creators: name: Barrabes, C.
name: Frolov, V. P.
name: Hogan, P. A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The light-like limit of the Kerr gravitational field relative to a distant observer moving rectilinearly in an arbitrary direction is an impulsive plane gravitational wave with a singular point on its wave front. By colliding particles with this wave we show that they have the same focussing properties as high speed particles scattered by the original black hole. By colliding photons with the gravitational wave we show that there is a circular disk, centered on the singular point on the wave front, having the property that photons colliding with the wave within this disk are reflected back and travel with the wave. This result is approximate in the sense that there are observers who can see a dim (as opposed to opaque) circular disk on their sky. By colliding plane electromagnetic waves with the gravitational wave we show that the reflected electromagnetic waves are the high frequency waves.
description: Latex file, 22 pages, 1 figure, accepted for publication in Classical and Quantum Gravity