cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Extraction of kinetic freeze-out properties and effect of resonance decays
Creators: name: Molnar, Levente
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We present STAR results from identified particle spectra measured in $\sqrt{s_{NN}}$ = 62.4 GeV Au-Au collisions. Particle production and system dynamics are compared to results at $\sqrt{s_{NN}}$ = 200 GeV. We extract kinetic and chemical freeze-out parameters using blast wave model parameterization and statistical model. We discuss the effect of resonance decays on the extracted kinetic freeze-out parameters.
description: Proceedings of the 21st Winter Workshop on Nuclear Dynamics, Breckenridge, Colorado, February 5-12, 2005
Topological entanglement entropy
Creators: name: Kitaev, Alexei
name: Preskill, John
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We formulate a universal characterization of the many-particle quantum entanglement in the ground state of a topologically ordered two-dimensional medium with a mass gap. We consider a disk in the plane, with a smooth boundary of length L, large compared to the correlation length. In the ground state, by tracing out all degrees of freedom in the exterior of the disk, we obtain a marginal density operator ρfor the degrees of freedom in the interior. The von Neumann entropy S(ρ) of this density operator, a measure of the entanglement of the interior and exterior variables, has the form S(ρ)= αL -γ+ ..., where the ellipsis represents terms that vanish in the limit L\to\infty. The coefficient α, arising from short wavelength modes localized near the boundary, is nonuniversal and ultraviolet divergent, but -γis a universal additive constant characterizing a global feature of the entanglement in the ground state. Using topological quantum field theory methods, we derive a formula for γin terms of properties of the superselection sectors of the medium.
description: 4 pages, 3 eps figures. v2: reference added
Ghetto-Narrative in deutschsprachigen Rap-Texten und Lebenswelten jugendlicher Hörer*innen: Handlungsmöglichkeiten für die Offene Jugendarbeit
Creators: name: Gross, Nicola
Publisher: name: Zenodo
Year: 2020

description: Gegenstand vorliegender Bachelorarbeit sind Ghetto-Narrative in deutschsprachigen Rap-Texten und die Lebenswelten der jugendlichen Hörer*innen. Aus Sicht der Sozialraumorientierung wird das Spannungsfeld zwischen künstlerischer Inszenierung und gesellschaftlicher Realität betrachtet. Ghetto-Narrative im Rap thematisieren sozioökonomische benachteiligte Quartiere und stellen soziale Räume als Orte dar, welche von Armut, Ausgrenzung, Kriminalität und Überlebenskampf auf der Strasse geprägt sind. Strassenrap ist eine kulturelle Ausdrucksform der Marginalisierten und dient deren Selbstermächtigung und Distinktion. Ursprünglich stigmatisierende Eigenschaften werden positiv umgedeutet und die eigene sozialräumliche Herkunft wird aufgewertet. Anhand von Bourdieus Theorie des Habitus werden Gemeinsamkeiten zwischen Rapper* innen und jugendlichen Fans aufgezeigt. Die Ausbildung des für Strassenrap spezifischen Habitus lässt sich unter anderem durch die Analyse der Dimensionen Klasse und Ethnizität und deren Verschränkung erklären. Diese haben Einfluss darauf, wo Menschen wohnen und weshalb benachteiligte Quartiere existieren. Strassenrap hat antidiskriminierendes und antirassistisches Potential, kann kulturelle Grenzen überwinden und fördert die kulturelle Repräsentation und den Zusammenhalt der Marginalisierten. Nebst dem bereitstellen von Infrastruktur für die Rap- und HipHop-Szene ist für die Offene Jugendarbeit in Bezug auf Strassenrap eine akzeptierende Arbeitshaltung zentral. Ausserdem existieren diverse Möglichkeiten für die Praxis, welche aus Sicht des Handlungsmodells für die Soziokulturelle Animation vorgestellt werden.
description: + Code Diss LU: hslusa bask be 2020 + Fussnote: Bachelorarbeit, Hochschule Luzern – Soziale Arbeit, Ausbildungsgang Soziokultur 2020 + NL-Code: NLLUHSA202002
Symmetry Properties of Autonomous Integrating Factors
Creators: name: Moyo, Sibusiso
name: Leach, P. G. L.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We study the symmetry properties of autonomous integrating factors from an algebraic point of view. The symmetries are delineated for the resulting integrals treated as equations and symmetries of the integrals treated as functions or configurational invariants. The succession of terms (pattern) is noted. The general pattern for the solution symmetries for equations in the simplest form of maximal order is given and the properties of the associated integrals resulting from this analysis are given.
description: Published in SIGMA (Symmetry, Integrability and Geometry: Methods and Applications) at http://www.emis.de/journals/SIGMA/
Helping Software Developers through Offline Repository Based API Searching in Data MiningIntegrated Environment
Creators: name: Ashraf, Ratul Uddin
name: Das, Anujoy
name: Rahman, Ziaur
name: Bahar, Ali Newaz
name: Rubaiyeat, Husne Ara
Publisher: name: arXiv
Year: 2020
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences
subject: K.6.3

description: Software development is getting changed so rapidly. It will be highly benefited if we can accelerate software development process by guiding developers. Appropriate guidelines and accurate recommendations to developers during development process can reduce software development expenses, as well as can save valuable times of developers. There are a number of approaches to speed up the software development process. It can be done through code assistance tools that help developers by recommending relevant items from searching particular repository of Application Programming Interface (API). Some approaches are based on online searching that have some drawbacks due to request and response latency as it has to deal with the extra-large files in a server. Developers generally uses previously completed resources as well as libraries or frameworks to generate relevant snippets which are supplied by the referral repository of APIs. Developers find it hard to choose the appropriate methods as there are thousands of methods in which some are not properly documented. In this paper we have proposed a concept and its respective framework to guide developers that suggests relevant API methods from an offline mined repository. From the investigation we made, we can say that our approach works much better than some of the existing approaches.
description: 4 Pages, 4 Figures 3 Tables
THE EFFECT OF A FOREST CONSERVATION REGULATION ON THE VALUE OF SUBDIVISIONS IN MARYLAND
Creators: name: Hardie, Ian W.
name: Nickerson, Cynthia J.
name: Hardie, Ian W.
name: Nickerson, Cynthia J.
Publisher: name: Unknown
Year: 2003
Subjects: Resource /Energy Economics and Policy

description: Profit-maximizing land developers are hypothesized to configure subdivisions to minimize the effects of a conservation regulation on developed land values, subject to their expectations about the demand for developed building lots. This hypothesis allows development of a hedonic price model that takes account of production adjustments. The model is applied to the Maryland Forest Conservation Act, which requires developers to retain or plant trees on part of the developed land. Being exempt from the Act allows developers to gain more for the subdivisions they develop: the cost to regulated developers is about six percent of the per-acre price of developed land. The Act has significantly lowered per-acre developed land values in subdivisions with a mixture of townhouses and single-family dwellings. Costs of the Act are reduced by provisions that allow developers to plant trees offsite or to pay fees in lieu of planting.
The Relationship Between Baryons and Dark Matter in Extended Galaxy Halos
Creators: name: Putman, M. E.
name: Rosenberg, J. L.
name: Stocke, J. T.
name: McEntaffer, R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The relationship between gas-rich galaxies and Ly-alpha absorbers is addressed in this paper in the context of the baryonic content of galaxy halos. Deep Arecibo HI observations are presented of two gas-rich spiral galaxies within 125 kpc projected distance of a Ly-alpha absorber at a similar velocity. The galaxies investigated are close to edge-on and the absorbers lie almost along their major axes, allowing for a comparison of the Ly-alpha absorber velocities with galactic rotation. This comparison is used to examine whether the absorbers are diffuse gas rotating with the galaxies' halos, outflow material from the galaxies, or intergalactic gas in the low redshift cosmic web. The results indicate that if the gas resides in the galaxies' halos it is not rotating with the system and possibly counter-rotating. In addition, simple geometry indicates the gas was not ejected from the galaxies and there are no gas-rich satellites detected down to 3.6 - 7.5 x 10^6 Msun, or remnants of satellites to 5-6 x 10^{18} cm^{-2}. The gas could potentially be infalling from large radii, but the velocities and distances are rather high compared to the high velocity clouds around the Milky Way. The most likely explanation is the galaxies and absorbers are not directly associated, despite the vicinity of the spiral galaxies to the absorbers (58-77 kpc from the HI edge). The spiral galaxies reside in a filament of intergalactic gas, and the gas detected by the absorber has not yet come into equilibrium with the galaxy. These results also indicate that the massive, extended dark matter halos of spiral galaxies do not commonly have an associated diffuse baryonic component at large radii.
description: Accepted by AJ, 33 pages preprint format, see http://www.astro.lsa.umich.edu/~mputman/putman1.pdf for a higher resolution version
THE IMPACTS OF ALLOCATION STRATEGIES FOR SPATIALLY REGULATED CHEMICAL USE
Creators: name: Lynch, Lori
name: Carpenter, Janet
name: Lynch, Lori
name: Carpenter, Janet
Publisher: name: Unknown
Year: 2001
Subjects: Environmental Economics and Policy

description: Spatial regulations can restrict chemical use more efficiently by linking benefits to the costs. California has instituted such a spatially based regulation of an agricultural fumigant to meet air quality standards. We examine the implications of alternative allocation mechanisms: use allocated based on a first come, first served basis; on quotas linked to historical use; and on the highest-value use. Although there are distributional impacts by crop, the overall change in aggregate value from using a highest value use mechanism rather than a first come, first served approach is estimated to be less than nine million.
Newspapers as a validation proxy for GIS modeling in Fujairah, United Arab Emirates: identifying flood‑prone areas
Creators: name: Yagoub, M. M.
Publisher: name: figshare
Year: 2020
Subjects: Geography

description: The UN Office for Disaster Risk Reduction listed 10 reasons businesses should reducetheir disaster exposure, including risk factoring, which cannot be achieved without historicaldata about hazards, their locations, magnitudes, and frequencies. Substantial hazarddata are reported by newspapers, which could add value to disaster management decisionmaking. In this study, a text-mining program extracted keywords related to floods’ geographiclocation, date, and damages from newspaper analyses of flash floods in Fujairah,UAE, from 2000–2018. The paper describes extracting such information as well as geocodingand validating flood-prone areas generated through geographic information system(GIS) modeling. The generation of flood-prone areas was based on elevation, slope, landuse, soil, and geology coupled with topographic wetness index, topographic position index,and curve number. Analytical Hierarchy Process (AHP) produced relative weight for eachfactor, and GIS map algebra generated flood-prone areas. AHP inclusion helped minimizeweight subjectivity among various experts. Of all areas, 85% are considered medium andlow flood-prone zones, mainly mountainous areas. However, the 15% that are high/veryhigh are dominated by urban areas in low coastal plains, predisposing them to flash floods.Eighty-four percent of flood events reported by newspapers were in areas rated as high/veryhigh flood-prone zones. In the absence of flood records, newspapers reports can be used asa reference. Policymakers should assess whether flood-prone area models offer accurateanalyses. These findings are useful for organizations related to disaster management, urbanplanning, insurance, archiving, and documentation.
Dipolar evaporation of reactive molecules to below the Fermi temperature
Creators: name: Valtolina, Giacomo
name: Matsuda, Kyle
name: Tobias, William G.
name: Li, Jun-Ru
name: De Marco, Luigi
name: Ye, Jun
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Atomic Physics (physics.atom-ph)
subject: Chemical Physics (physics.chem-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Molecules are the building blocks of matter and their control is key to the investigation of new quantum phases, where rich degrees of freedom can be used to encode information and strong interactions can be precisely tuned. Inelastic losses in molecular collisions, however, have greatly hampered the engineering of low-entropy molecular systems. So far, the only quantum degenerate gas of molecules has been created via association of two highly degenerate atomic gases. Here, we use an external electric field along with optical lattice confinement to create a two-dimensional (2D) Fermi gas of spin-polarized potassium-rubidium (KRb) polar molecules, where elastic, tunable dipolar interactions dominate over all inelastic processes. Direct thermalization among the molecules in the trap leads to efficient dipolar evaporative cooling, yielding a rapid increase in phase-space density. At the onset of quantum degeneracy, we observe the effects of Fermi statistics on the thermodynamics of the molecular gas. These results demonstrate a general strategy for achieving quantum degeneracy in dipolar molecular gases to explore strongly interacting many-body phases.
description: 8+4 pages, 4+4 figures
Ginzburg-Landau approach to the three flavor LOFF phase of QCD
Creators: name: Casalbuoni, R.
name: Gatto, R.
name: Ippolito, N.
name: Nardulli, G.
name: Ruggieri, M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We explore, using a Ginzburg-Landau expansion of the free energy, the Larkin-Ovchinnikov-Fulde-Ferrell (LOFF) phase of QCD with three flavors, using the NJL four-fermion coupling to mimic gluon interactions. We find that, below the point where the QCD homogeneous superconductive phases should give way to the normal phase, Cooper condensation of the pairs u-s and d-u is possible, but in the form of the inhomogeneous LOFF pairing.
description: 8 pages, 4 figures. Eq. (20) corrected. As a consequence figures have been modified to show only the solution with parallel total momenta of the us, ud pairs, as the other configurations are suppressed. Main conclusions of the paper are unchanged
Spatio-temporal and hazard mapping of Earthquake in UAE (1984–2012): Remote sensing and GIS application
Creators: name: Yagoub, M. M.
Publisher: name: figshare
Year: 2020
Subjects: Geography

description: Analyzing data from 1984 to 2012 showed that during the period of 28 years there were frequentearthquakes that occurred with intensity ranges from mild to moderate with the maximum magnitude of 5.1.Spatially, earthquake events were found clustered in the Emirate of Fujairah in the Eastern part of UAE (OmanThrust). Temporally, the maximum number of earthquake events (49% of the events) occurred in 2011 and this is inline with the United States Geological Survey (USGS) report that indicates in 2011 the earthquake activity reachedits highest level in 20 years. Even the magnitude of the earthquakes is low, the frequency of being increased in thepast few years coupled with urban development are point of concern and it becomes necessary to developpreventive measures such as hazard maps for the area. In this study seven parameters are used for generation of ahazard map, this includes geology, soil, slope, land use, historical earthquake events, fault line, and roads. GISweighted overlay analysis is used to demarcate the earthquake risk zones.
Performance Evaluation of Fuzzy Integrated Firewall Model for Hybrid Cloud based on Packet Utilization
Creators: name: Rahman, Ziaur
name: Swapna, Asma Islam
name: Habib, Habibur Rahman
name: Shaoun, Akramuzzaman
Publisher: name: arXiv
Year: 2020
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences
subject: C.2.1

description: Cloud computing is one of the highly flexible, confidential and easily accessible medium of platforms and provides powerful service for sharing information over the Internet. Cloud security has become an emerging issue as network manager eventually encounter its data protection, vulnerability during information exchange on the cloud system. We can protect our data from unwanted access on a hybrid cloud through controlling the respective firewall of the network. But, the firewall has already proved its weakness as it is unable to ensure multi-layered, secured accessibility of the cloud network. Efficient packet utilization sometimes causes high response time in accessing hybrid cloud. In this paper, a Cloud Model with Hybrid functionality and a secure Fuzzy Integrated Firewall for that Hybrid Cloud is proposed and thereby evaluated for the performance in traffic response. Experimental result illustrated that having a fuzzified firewall gives high point-to-point packet utilization decreasing the response time than a conventional firewall. Results from this research work will highly be implemented in transplanting artificial intelligence in future Internet of Things (IoT).
description: 6 Pages, 2 Tables, 7 Figures
U.S./CANADIAN AGRICULTURAL POLICIES AND EFFECTS ON WESTERN HEMISPHERE MARKETS SINCE 1995, WITH A FOCUS ON GRAINS AND OILSEEDS
Creators: name: Gardner, Bruce L.
name: Gardner, Bruce L.
Publisher: name: Unknown
Year: 2002
Subjects: Agricultural and Food Policy

description: U.S. and Canadian agricultural support policies for grains are reviewed, focusing on changes since 1995. Estimates of effects on acreage and production from the literature and from acreage data for the U.S. are estimated. Likely further effects of the U.S. 2002 Farm Act are discussed, including discussion of the likelihood of breaching Uruguay Round Agricultural Agreement limits for domestic support in the WTO.
Effective energy-momentum tensor of strong-field QED with unstable vacuum
Creators: name: Gavrilov, S. P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the influence of a vacuum instability on the effective energy-momentum tensor (EMT) of QED, in the presence of a quasiconstant external electric field, by means of the relevant Green functions. In the case when the initial vacuum, |0,in>, differs essentially from the final vacuum, |0,out>, we find explicitly and compared both the vacuum average value of EMT, <0,in|T_{μν}|0,in>, and the matrix element, <0,out|T_{μν}|0,in>. In the course of the calculation we solve the problem of the special divergences connected with infinite time T of acting of the constant electric field. The EMT of pair created by an electric field from the initial vacuum is presented. The relations of the obtained expressions to the Euler-Heisenberg's effective action are established.
description: 8 pages, 1 figure, Talk given at "QFEXT'05", the 7-th workshop on quantum field theory under the influence of external conditions, Barcelona, Spain, Sept. 5-9, 2005; minor misprints corrected
Better User Recommendations using Enhancing Software Development Process Repository
Creators: name: Rahman, Ziaur
name: Hasan, Md. Kamrul
Publisher: name: arXiv
Year: 2020
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences
subject: K.6.3

description: Reusing previously completed software repository to enhance the development process is a common phenomenon. If developers get suggestions from the existing projects they might be benefited a lot what they eventually expect while coding. The strategies available in this field have been rapidly changing day by day. There are a number of efforts that have been focusing on mining process and constructing repository. Some of them have emphasized on the web based code searching while others have integrated web based code searching in their customized tool. But web based approaches have inefficiency especially in building repository on which they apply mining technologies. To search the code snippets in response to the user query we need an enriched repository with better representation and abstraction. To ensure that repository before mining process we have developed a concept based on Enhancing Software Development Process (ESDP). In ESDP approach multiple sources of codes from both online and offline storages are considered to construct the central repository with XML representation and applied mining techniques in the client side. The respective evaluation shows that ESDP approach works much better in response time and performance than many other existing approaches available today.
description: 6 Pages 6 Figures 8 Tables
[Letter from Johan Nordal Fischer Wille]
Creators: name: Wille, Johan Nordal Fischer
Publisher: name: Unknown
Year: 1903

description: He encloses Lithothamnion specimens from the Fram Expedition. For further information, he should contact Candidate H. G. Simmons, Botanical Museum, Kjøbenhavn.
description: Handwritten comment: M. farinosa, on the letter.
Correlative study of the effect of the squat exercises on the improvement of the olympic exercises performance in Algerian weightlifters
Creators: name: Gasmi, Amin
Publisher: name: figshare
Year: 2020
Subjects: subject: 110699 Human Movement and Sports Science not elsewhere classified
subject: FOS: Health sciences

description: The purpose of this study was to determine the influence of the two squat variants (back and front squat) on the two olympic movements (snatch, clean and jerk) results. Seventy two (72) Algerian weightlifters, which nine of them are international confirmed weightlifters, have taken part in this study. Each weightlifter has gone through four maximal tests (1-RM) : snatch, clean and jerk, back and front squat. For each test the weightlifter has performed three trials. The best result in each test has been registred. Many categories was selected from the collected data : age (three categories), height (three categories) and weight (four categories). Then, we have statistically analyzed the selected data with a Personal Computer equiped by a statistics software : SPSS in order to determine the relationship between the squat exercises and the olympic movements results in different categories of age, height and weight by calculating the correlation coefficient of Pearson. The results of this research shows that Pearson coefficients are higher than 0,9 with a signification level of α = 0,0005 between the squat exercises and the olympic movements performances in any category of age, height or weight whichconfirms our hypothesis about the importance of the squat exercises in the improvement of the snatch and clean and jerk results. In front of this, no significative difference wasobserved between the influence neither of the back squat nor of the front squat on the olympic exercises which prove that the back and the front squat improve in the same waythe results of the snatch and the clean and jerk.
Optimal Contracts for Exploration with Cost Recovery of an Exhaustible Natural Resource Under Asymmetric Information
Creators: name: Helal, Uddin
name: Rahman, Shaikh Mahfuzur
name: Helal, Uddin
name: Rahman, Shaikh Mahfuzur
Publisher: name: Unknown
Year: 2006
Subjects: Resource /Energy Economics and Policy

description: Exploration of an exhaustible resource with cost recovery under asymmetric information about cost is modeled and analyzed employing Principal-Agent theory. Allocation of lower than full information level of effort for the high-cost firms is found socially optimal. However, distortion is less in a two-stage process of exploration and extraction.
QUALITY INSPECTION, ADVERSE SELECTION AND TRADE IN PERISHABLE COMMODITIES
Creators: name: Dimitri, Carolyn
name: Lichtenberg, Erik
name: Dimitri, Carolyn
name: Lichtenberg, Erik
Publisher: name: Unknown
Year: 2002
Subjects: International Relations/Trade

description: The quality of many goods and services may change randomly between the time of shipment and delivery, creating disputes over quality that can result in lemons-market equilibria. We investigate the potential of third-party inspections for such inefficiencies. We consider two types of inspection, ex post verification of quality in consignment contracts and ex ante certification in FOB contracts, which were instituted for fruits and vegetables in the U.S. when national markets were emerging. We show that both types of inspection can counteract misallocations of quality found in lemons-market equilibria. Buyers prefer ex post verification to ex ante certification while sellers prefer the reverse. Government provision of inspection services may be necessary for making provision of inspection services economically viable, and may be desirable for reducing inefficiencies due to the costliness of inspection. The U.S. experience may provide lessons for developing countries in creating marketing institutions to foster economic growth.
Broad band variability of SS433: Accretion disk at work?
Creators: name: Revnivtsev, M.
name: Fabrika, S.
name: Abolmasov, P.
name: Postnov, K.
name: Bikmaev, I.
name: Burenin, R.
name: Pavlinsky, M.
name: Sunyaev, R.
name: Khamitov, I.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present broad band power spectra of variations of SS433 in radio, optical and X-ray spectral bands. We show that at frequencies lower than 1e-5 Hz the source demonstrates the same variability pattern in all these bands. The broad band power spectrum can be fitted by one power law down to frequencies ~1e-7 Hz with flattening afterwards. Such a flattening means that on time scales longer than ~1e7 sec the source variability becomes uncorrelated. This naturally leads to the appearance of quasi-poissonian flares in the source light curve, which have been regularly observed in radio and optical spectral bands. The radio flux power spectrum appears to have a second break at Fourier frequencies ~1e-5 Hz which can be caused by the smearing of the intrinsic radio variability on timescale of the light-crossing time of the radio emitting region. We find a correlation of the radio and optical fluxes of SS433 and the radio flux is delayed by about ~2 days with respect to the optical one. Power spectra of optical and X-ray variabilities continue with the same power law from 1e-7 Hz up to ~0.01-0.05 Hz. The broad band power spectrum of SS433 can be interpreted in terms of self-similar accretion rate modulations in the accretion disk proposed by Lyubarskii (1997) and elaborated by Churazov et al. (2001). We discuss a viscous time-scale in the accretion disk of SS433 in implication to the observed broad band power spectrum.
description: 8 pages, 2 figures. Submitted to A&A
COMPARING THE PERFORMANCES OF THE PARTIAL EQUILIBRIUM AND TIME-SERIES APPROACHES TO HEDGING
Creators: name: Bryant, Henry L.
name: Haigh, Michael S.
name: Bryant, Henry L.
name: Haigh, Michael S.
Publisher: name: Unknown
Year: 2003
Subjects: subject: Marketing
subject: FOS: Economics and business
subject: Risk and Uncertainty

description: This research compares partial equilibrium and statistical time-series approaches to hedging. The finance literature stresses the former approach, while the applied economics literature has focused on the latter. We compare the out-of-sample hedging effectiveness of the two approaches when hedging commodity price risk using futures contracts. For various methods of parameter estimation and inference, we find that the partial equilibrium models cannot out-perform a vector error-correction model with a GARCH error structure. The partial equilibrium models' unpalatable assumption of deterministically evolving futures volatility seems to impede their hedging effectiveness, even when potentially foresighted option-implied volatility term structures are employed.
Computing Floquet Hamiltonians with Symmetries
Creators: name: Loring, Terry
name: Vides, Fredy
Publisher: name: arXiv
Year: 2020
Subjects: subject: Numerical Analysis (math.NA)
subject: Mathematical Physics (math-ph)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 65F60

description: Unitary matrices arise in many ways in physics, in particular as a time evolution operator. For a periodically driven system one frequently wishes to compute a Floquet Hamilonian that should be a Hermitian operator $H$ such that $e^{-iTH}=U(T)$ where $U(T)$ is the time evolution operator at time corresponding the period of the system. That is, we want $H$ to be equal to $-i$ times a matrix logarithm of $U(T)$. If the system has a symmetry, such as time reversal symmetry, one can expect $H$ to have a symmetry beyond being Hermitian. We discuss here practical numerical algorithms on computing matrix logarithms that have certain symmetries which can be used to compute Floquet Hamiltonians that have appropriate symmetries. Along the way, we prove some results on how a symmetry in the Floquet operator $U(T)$ can lead to a symmetry in a basis of Floquet eigenstates.
description: 25 pages, 13 figure, 14 ancillary files, primarily Matlab files. Updated to have correct spelling of author names of authors in the Arxiv metadata
title: The Effects of a Modified Gantt Chart Depicting Schedule Risk
Creators: name: Hope, Joseph Allen
Publisher: name: Old Dominion University Libraries
Year: 2003

description: The tools and methodologies used to manage projects continue to evolve. A popular project management tool for monitoring a project's schedule is the Gantt chart. The Gantt chart provides information about projected start and end times for each task of a project. A critical limitation of the Gantt chart, however, is its inability to depict uncertainty surrounding the project schedule, or project schedule risk. The present study investigated the effectiveness of three alternative formats for depicting schedule risk. The three presentation formats used were a table, a table with a traditional Gantt chart, and a table and a modified Gantt chart that includes a triangular distribution to represent schedule risk. Eighteen undergraduate students viewed three PowerPoint slideshow presentations containing thirty questions each. The independent variables of task type (single or multiple) and question type (specific date, contingency, or distribution) resulted in six question categories. The measures of effectiveness for each presentation format were accuracy and speed. Results showed the modified Gantt was more effective for conveying schedule risk on distribution and contingency questions than the other two formats. These findings could have important design implications in the how future project management applications convey schedule risk.
St. Maria Magdalena, St. Thomas und St. Markus
Creators: name: Pahlitzsch, Johannes
Publisher: name: Oriens christianus : Hefte für die Kunde des christlichen Orients
Year: 2024

description: Oriens christianus : Hefte für die Kunde des christlichen Orients, Bd. 81 (1997): Oriens christianus, Band 81
Ringlike vortices in a logarithmic generalized Maxwell theory
Creators: name: Lima, F. C. E.
name: Almeida, C. A. S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate the presence of vortex structures in a Maxwell model with a logarithmic generalization. This generalization becomes important because it generates stationary field solutions in models that describe the dynamics of a scalar field. In this work, we will choose to investigate the dynamics of the complex scalar field with the gauge field governed by Maxwell term. For this, we will investigate the Bogomol'nyi equations to describe the static field configurations. Then, we show numerically that the complex scalar field solutions that generate minimum energy configurations have internal structures. Finally, assuming a planar vision, the magnetic field and the density energy show the interesting feature of the ringlike vortex.
description: 15 pages, 6 figures. To appear in Europhysics Letters
MPEC 2024-A144 : 2024 AR3
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 AR3

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
An empirical formula for the mass-loss rates of dust-enshrouded red supergiants and oxygen-rich Asymptotic Giant Branch stars
Creators: name: van Loon, Jacco Th.
name: Cioni, Maria-Rosa L.
name: Zijlstra, Albert A.
name: Loup, Cecile
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present an empirical determination of the mass-loss rate as a function of stellar luminosity and effective temperature, for oxygen-rich dust-enshrouded Asymptotic Giant Branch stars and red supergiants. To this aim we obtained optical spectra of a sample of dust-enshrouded red giants in the Large Magellanic Cloud, which we complemented with spectroscopic and infrared photometric data from the literature. Two of these turned out to be hot emission-line stars, of which one is a definite B[e] star. The mass-loss rates were measured through modelling of the spectral energy distributions. We thus obtain the mass-loss rate formula log Mdot = -5.65 + 1.05 log(L / 10,000 Lsun) -6.3 log(Teff / 3500 K), valid for dust-enshrouded red supergiants and oxygen-rich AGB stars. Despite the low metallicity of the LMC, both AGB stars and red supergiants are found at late spectral types. A comparison with galactic AGB stars and red supergiants shows excellent agreement between the mass-loss rate as predicted by our formula and that derived from the 60 micron flux density for dust-enshrouded objects, but not for optically bright objects. We discuss the possible implications of this for the mass-loss mechanism.
description: Accepted for publication in Astronomy and Astrophysics, 17 pages including figures
Correlative study of the effect of the squat exercises on the improvement of the olympic exercises performance in Algerian weightlifters
Creators: name: Gasmi, Amin
Publisher: name: figshare
Year: 2020
Subjects: subject: 110699 Human Movement and Sports Science not elsewhere classified
subject: FOS: Health sciences

description: The purpose of this study was to determine the influence of the two squat variants (back and front squat) on the two olympic movements (snatch, clean and jerk) results. Seventy two (72) Algerian weightlifters, which nine of them are international confirmed weightlifters, have taken part in this study. Each weightlifter has gone through four maximal tests (1-RM) : snatch, clean and jerk, back and front squat. For each test the weightlifter has performed three trials. The best result in each test has been registred. Many categories was selected from the collected data : age (three categories), height (three categories) and weight (four categories). Then, we have statistically analyzed the selected data with a Personal Computer equiped by a statistics software : SPSS in order to determine the relationship between the squat exercises and the olympic movements results in different categories of age, height and weight by calculating the correlation coefficient of Pearson. The results of this research shows that Pearson coefficients are higher than 0,9 with a signification level of α = 0,0005 between the squat exercises and the olympic movements performances in any category of age, height or weight whichconfirms our hypothesis about the importance of the squat exercises in the improvement of the snatch and clean and jerk results. In front of this, no significative difference wasobserved between the influence neither of the back squat nor of the front squat on the olympic exercises which prove that the back and the front squat improve in the same way the results of the snatch and the clean and jerk.
Spiral waves and the secondary in the novalike variable, V3885 Sgr
Creators: name: Hartley, L. E.
name: Murray, J. R.
name: Drew, J. E.
name: Long, K. S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present seven nights' blue spectroscopy of the novalike variable star, V3885 Sgr. The line spectrum shows a typical combination of broad absorption and emission in H gamma and H beta and He I, which is associated with the accretion disk. We also observe anti-phased narrow emission, which we attribute to irradiation of the secondary star. The He II 4686 and N III--C III--C IV emission lines are devoid of structure and are most likely formed in an outflow. We measure radial velocity shifts in the absorption and emission lines, from which we fit an orbital period of 4.97126+/-0.00036h. From the velocity semi-amplitudes of the disk and companion star, we are able to constrain the binary mass ratio to q>0.7. The phase-folded spectra provide dense coverage of the entire orbital cycle. Doppler tomograms of the hydrogen and He I lines reveal spiral structure in the accretion disk and the irradiated donor star. We believe this is the first unambiguous detection of spiral waves in a novalike variable.
description: 9 pages, accepted for publication in MNRAS
Optimal STEM Convergence Angle Selection using a Convolutional Neural Network and the Strehl Ratio
Creators: name: Schnitzer, Noah
name: Sung, Suk Hyun
name: Hovden, Robert
Publisher: name: arXiv
Year: 2020
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: Selection of the correct convergence angle is essential for achieving the highest resolution imaging in scanning transmission electron microscopy (STEM). Use of poor heuristics, such as Rayleigh's quarter-phase rule, to assess probe quality and uncertainties in measurement of the aberration function result in incorrect selection of convergence angles and lower resolution. Here, we show that the Strehl ratio provides an accurate and efficient to calculate criteria for evaluating probe size for STEM. A convolutional neural network trained on the Strehl ratio is shown to outperform experienced microscopists at selecting a convergence angle from a single electron Ronchigram using simulated datasets. Generating tens of thousands of simulated Ronchigram examples, the network is trained to select convergence angles yielding probes on average 85% nearer to optimal size at millisecond speeds (0.02% human assessment time). Qualitative assessment on experimental Ronchigrams with intentionally introduced aberrations suggests that trends in the optimal convergence angle size are well modeled but high accuracy requires extensive training datasets. This near immediate assessment of Ronchigrams using the Strehl ratio and machine learning highlights a viable path toward rapid, automated alignment of aberration-corrected electron microscopes.
description: 28 pages, 5 figures
THE ROLE OF LIABILITY, REGULATION AND ECONOMIC INCENTIVES IN BROWNFIELD REMEDIATION AND REDEVELOPMENT: EVIDENCE FROM SURVEYS OF DEVELOPERS
Creators: name: Alberini, Anna
name: Longo, Alberto
name: Tonin, Stefania
name: Trombetta, Francesco
name: Turvani, Margherita
name: Alberini, Anna
name: Longo, Alberto
name: Tonin, Stefania
name: Trombetta, Francesco
name: Turvani, Margherita
Publisher: name: Unknown
Year: 2002
Subjects: Environmental Economics and Policy
Land Economics/Use

description: We examine different market-based mechanisms and other incentives intended to promote the environmental remediation and reuse of brownfields. Policies that encourage cleanup and re-use of brownfields offer real estate developers reductions in regulatory burden, relief from liability for future cleanups once certain mitigation standards are met, and/or financial support for regeneration of brownfields. We use conjoint choice experiments-a stated preference approach-to assess the responses of real estate developers to different mixes of these incentives. Our survey instrument was administered in person to a sample of developers and real estate professionals randomly intercepted at the Marché International des Professionnels de l'Immobilier (MIPIM) in Cannes, France, in March 2002. Conditional and random-coefficient logit models of the responses to the choice questions indicate that developers find sites with contamination problems less attractive than others, and that they value liability relief. This confirms our expectation that contaminated sites are less desirable because of the associated cleanup costs, but refutes earlier claims that liability does not matter. Our developers are not deterred by prior contamination, once it has been cleaned up, suggesting that "contamination stigma" is not very important, and appreciate fast-track review of development and remediation plans, direct financial incentives, and flexible (negotiable) cleanup standards. Developers with prior experience with contaminated sites are more responsive to the policies than are inexperienced developers, especially for subsidies. Inexperienced developers are more responsive to liability relief and regulatory relief than they are to subsidies. Similar considerations hold true for larger developers.
Spontaneous emission rates of dipoles in photonic crystal membranes
Creators: name: Koenderink, A. F.
name: Kafesaki, M.
name: Soukoulis, C. M.
name: Sandoghdar, V.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We show theoretically that finite two-dimensional (2D) photonic crystals in thin semiconductor membranes strongly modify the spontaneous emission rate of embedded dipole emitters. Three-dimensional Finite-Difference Time-Domain calculations show over 7 times inhibition and 15 times enhancement of the emission rate compared to the vacuum emission rate for judiciously oriented and positioned dipoles. The vertical index confinement in membranes strongly enhances modifications of the emission rate as compared to vertically unconfined 2D photonic crystals. The emission rate modifications inside the membrane mimic the local electric field mode density in a simple 2D model. The inhibition of emission saturates exponentially as the crystal size around the source is increased, with a $1/e$ length that is inversely proportional to the bandwidth of the emission gap. We obtain inhibition of emission only close to the slab center. However, enhancement of emission persists even outside the membrane, with a distance dependence which dependence can be understood by analyzing the contributions to the spontaneous emission rate of the different vertically guided modes of the membrane. Finally we show that the emission changes can even be observed in experiments with ensembles of randomly oriented dipoles, despite the contribution of dipoles for which no gap exists.
Self-accelerating beam dynamics in the space fractional Schrödinger equation
Creators: name: Colas, David
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Self-accelerating beams are fascinating solutions of the Schrödinger equation. Thanks to their particular phase engineering, they can accelerate without the need of external potentials or applied forces. Finite-energy approximations of these beams have led to many applications, spanning from particle manipulation to robust in vivo imaging. The most studied and emblematic beam, the Airy beam, has been recently investigated in the context of the fractional Schrödinger equation. It was notably found that the packet acceleration would decrease with the reduction of the fractional order. Here, I study the case of a general nth-order self-accelerating caustic beam in the fractional Schrödinger equation. Using a Madelung decomposition combined with the wavelet transform, I derive the analytical expression of the beam's acceleration. I show that the non-accelerating limit is reached for infinite phase order or when the fractional order is reduced to 1. This work provides a quantitative description of self-accelerating caustic beams' properties.
description: 8 pages, 4 figures
D4.1-Counterfactual Risk Analysis
Creators: name: Woo, Gordon
name: Piotrowicz, Wojciech
Publisher: name: Zenodo
Year: 2024

description: Task 4.1 focuses on downward counterfactual risk analysis. This analysis is based on the counterfactual assessment of salient historical events, specifically the seven designated CORE events, and is an extension of scenario analysis. Compared with generic scenario analysis, the key innovation in downward counterfactual scenario analysis is the exploration of alternative realisations of actual historical events (Woo et al., 2017: Woo, 2019; Lin et al., 2020; Ciullo et al., 2021; Woo, 2021). Beyond WP4, this new perspective on the seven designated CORE events adds a further dimension to the understanding of the role of science and human factors in achieving societal resilience. A detailed presentation of the concepts underlying downward counterfactuals is given in section 1.2, following a general review of scenario analysis.
EPIC Simulations of Neptune's Dark Spots Using an Active Cloud Microphysical Model
Creators: name: Hadland, Nathan
name: Sankar, Ramanakumar
name: LeBeau,, Raymond Paul
name: Palotai, Csaba
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The Great Dark Spot (GDS-89) observed by Voyager 2 was the first of several large-scale vortices observed on Neptune, the most recent of which was observed in 2018 in the northern hemisphere (NDS-2018). Ongoing observations of these features are constraining cloud formation, drift, shape oscillations, and other dynamic properties. In order to effectively model these characteristics, an explicit calculation of methane cloud microphysics is needed. Using an updated version of the Explicit Planetary Isentropic Coordinate General Circulation Model (EPIC GCM) and its active cloud microphysics module to account for the condensation of methane, we investigate the evolution of large scale vortices on Neptune. We model the effect of methane deep abundance and cloud formation on vortex stability and dynamics. In our simulations, the vortex shows a sharp contrast in methane vapor density inside compared to outside the vortex. Methane vapor column density is analogous to optical depth and provides a more consistent tracer to track the vortex, so we use that variable over potential vorticity. We match the meridional drift rate of the GDS and gain an initial insight into the evolution of vortices in the northern hemisphere, such as the NDS-2018.
description: 9 pages, 12 figures, accepted for publication in MNRAS