cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Evolution of charge density wave order and superconductivity under pressure in LaPt$_2$Si$_2$
Creators: name: Shen, B.
name: Du, F.
name: Li, R.
name: Thamizhavel, A.
name: Smidman, M.
name: Nie, Z. Y.
name: Luo, S. S.
name: Le, T.
name: Hossain, Z.
name: Yuan, H. Q.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report measurements of the electrical resistivity and ac magnetic susceptibility of single crystalline LaPt$_2$Si$_2$ under pressure, in order to investigate the interplay of superconductivity and CDW order. LaPt$_2$Si$_2$ exhibits a first order phase transition from a tetragonal to orthorhombic structure, accompanied by the onset of CDW order below $T_{\rm{CDW}}$ = 76 K, while superconductivity occurs at a lower temperature of $T_{\rm{c}}$ = 1.87 K. We find that the application of pressure initially suppresses the CDW transition, but enhances $T_{\rm{c}}$. At pressures above 2.4 GPa, CDW order vanishes, while both $T_{\rm{c}}$ and the resistivity $A$-coefficient reach a maximum value around this pressure. Our results suggest that the occurrence of a superconducting dome can be accounted for within the framework of BCS theory, where there is a maximum in the density of states upon the closure of the CDW gap.
description: 6 pages, 5 figures
Electron correlation effects in the exchange coupling at the Fe/CoO/Ag(001) ferro-/antiferro-magnetic interface
Creators: name: Sbroscia, Marco
name: Verna, Adriano
name: Stefani, Giovanni
name: Vaidya, Shital Ramchandra
name: Moroni, Riccardo
name: Bisio, Francesco
name: Iacobucci, Stefano
name: Offi, Francesco
name: Simonucci, Stefano
name: Ruocco, Alessandro
name: Gotter, Roberto
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Angle resolved-Auger-photoelectron coincidence spectroscopy (AR-APECS) has been exploited to investigate the role that electron correlation plays in the exchange-coupling at the ferromagnetic/antiferromagnetic interface of a Fe/CoO bilayer growth on Ag(001). The effective correlation energy U$_{\textrm{eff}}$, usually employed to assess the energy distribution of core-valence-valence Auger spectra, has been experimentally determined for each possible combination of the orbital (e$_g$ or t$_{2g}$) and the spin (majority or minority) of the two valence electrons involved in the Auger decay. Coulomb and exchange interactions have been identified and compared with the result obtained on the Fe/Ag system. The presented analysis reveals in the Fe/CoO interface an enhancement of the Coulomb interaction for the e$_g$ orbital and of the exchange interaction for the t$_{2g}$ orbital with respect to the Fe/Ag case that can be associated to the stronger electron confinement and to the exchange coupling between the two layers, respectively.
description: 37 pages, 6 figures
Hydrodynamic attractor of a hybrid viscous fluid in Bjorken flow
Creators: name: Mitra, Toshali
name: Mondkar, Sukrut
name: Mukhopadhyay, Ayan
name: Rebhan, Anton
name: Soloviev, Alexander
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The nonequilibrium evolution in a boost-invariant Bjorken flow of a hybrid viscous fluid model containing two interacting components with different viscosities, such that they represent strongly and weakly self-coupled sectors, is shown to be characterized by a hydrodynamic attractor which has an early-time behavior that is reminiscent of the so-called bottom-up thermalization scenario in heavy-ion collisions. The hydrodynamization times for the two sectors can differ strongly, with details depending on the curve realized on the two-dimensional attractor surface, which might account for different scenarios for small and large systems in nuclear collisions. The total system behaves like a single viscous fluid with a dynamically determined effective shear viscosity.
description: 7 pages, 3 figures, 1 table; v2: minor corrections and some extensions
[Halle (Saale), Universitäts- und Landesbibliothek Sachsen-Anhalt, Morbio 5 (274)]
Creators: name: Johaninus
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 1399
Subjects: subject: Sonstige geistliche Aussteller
subject: Notarsurkunde
subject: Urkunde
subject: 090

description: Johaninus de Uspinellis, praepositus des Klosters St. Cataldi in Cremona, verpachtet mit Zustimmung des Georgius de Uspinellis, canonicus des genannten Klosters, dem Guidinus de Bonuinis, Sohn des verstorbenen Antoniolus, wohnhaft in Costa Sant'Abramo im districtus von Cremona, auf neun Jahre ein Stück Land im Gebiet von Casanova del Morbasco an einem Ort, genannt Cagalupus. Es schließt sich ein weiterer Rechtsakt an, in welchem die Vertreter des genannten Klosters dem Andriolus de Cazonibus, Sohn des verstorbenen Gandolfus, wohnhaft in Casanova del Morbasco, Land verpachten.
Power in Sierra Leone_ Seizing the Mini-grids opportunity to achieve SDG7.
Creators: name: Thoronka, Jeremiah
Publisher: name: figshare
Year: 2021
Subjects: subject: 150304 Entrepreneurship
subject: FOS: Economics and business
subject: 90608 Renewable Power and Energy Systems Engineering (excl. Solar Cells)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: 90607 Power and Energy Systems Engineering (excl. Renewable Power)
subject: Environmental Humanities
subject: 90703 Environmental Technologies
subject: FOS: Environmental engineering

description: The article aims to not only raise awareness about the mini-grids sector and the critical role they can play in achieving SDG7 targets by 2030 but also provide a foundation for rich knowledge and data in a transparent manner to mobilize investments and the effective utilization of the sector.
An Overview of Climate Change: What does it mean for our way of life? What is the best future we can hope for?
Creators: name: Goodwin, Neva R.
name: Goodwin, Neva R.
Publisher: name: Unknown
Year: 2008
Subjects: Environmental Economics and Policy
Institutional and Behavioral Economics
International Development
International Relations/Trade
Political Economy
Resource /Energy Economics and Policy

description: This paper starts with the question of whether climate change will require a significant reduction of consumption among the richer people in the world, and ends with the most optimistic picture the author can conjure up, of the world in the year 2075. That hopeful picture is of a world in which inequalities – among and within nations – have been substantially reduced. The challenges and adjustments confronting humanity in the coming decades provide an opportunity that could be used to mitigate climate change in ways that can improve the circumstances of the poor. Ecological reasons to reduce throughput of energy and materials in economic systems urge the abandonment of high-consumption life-styles. The 21st century will be an era of many losses, but it is conceivable that societies will successfully make the transition from goals of economic growth, as understood in the 20th century, to goals of maintaining and increasing sustainable well-being.
In-medium jet modification measured by PHENIX via two particle correlations and high pT hadrons in A+A collisions
Creators: name: Hodges, Anthony
Publisher: name: Zenodo
Year: 2020
Subjects: qm19
phenix
jet
rhic
modification
hadron
correlations
cu+au
raa
au+au
u+u
π0

description: Talk presented at the Quark Matter 2019 conference. An analysis of jet modification factors in PHENIX.
[Halle (Saale), Universitäts- und Landesbibliothek Sachsen-Anhalt, Morbio 4 (97 b)]
Creators: name: Ottorinus Bera
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 1326
Subjects: subject: Sonstige weltliche Aussteller
subject: Notarsurkunde
subject: Urkunde
subject: 090

description: Ottorinus Bera und weitere namentlich genannte consules und Offiziale von Mesero lösen die Schulden des Zonfredus Palloni aus.
An apparently normal gamma-ray burst with an unusually low luminosity
Creators: name: Sazonov, S.
name: Lutovinov, A.
name: Sunyaev, R.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Much of progress in gamma-ray bursts has come from the studies of distant events (redshift z~1). The brightest GRBs are the most collimated events and seen across the Universe due to their brilliance. It has long been suspected that nearest (and most common) events have been missed because they are not so collimated or under-energetic or both. Here we report soft gamma-ray observations of GRB 031203, the nearest event to date (z=0.106). This event with a duration of 40 s and peak energy of >190 keV appears to be a typical long duration GRB. However, the isotropic gamma-ray energy
description: 11 pages, 3 figures
Life annuity program in Romania: is the indemnity high enough to be efficient?
Creators: name: Ghib, Marie-Luce
name: Ghib, Marie-Luce
Publisher: name: Unknown
Year: 2008
Subjects: subject: Land Economics/Use
subject: Life annuity program
subject: Land policy
subject: Romania

description: Romania bears the marks of the country’s former land policies : 36% of the active population is involved in agricultural activity. In addition, the agricultural land is characterized by excessive land fragmentation (approximately 2 ha per holding). In the context of a strong will to stimulate the land market and to encourage competitiveness by modernizing the production systems, the Ministry of Agriculture in 2005 decided to implement a specific policy : the life annuity subsidy. This consists in a subsidy calculated according to the surface of the agricultural land, paid to people over 62 years old who commit themselves to stopping agricultural activity. This paper analyses the opportunity for farmers to participate in this program using a Net Present Value to test the financial incentive of the measure under renting or selling contracts. We based our analysis on data concerning the land market and profitability from a survey conducted in the Mures region in the summer of 2007 and on land price figures. We show that in this specific context of grain and land prices, the amount of the subsidy is not high enough to make the program attractive but comforts landowners who are already engaged in renting contracts.
Anisotropic Ultrafast Spin Dynamics in Epitaxial Cobalt
Creators: name: Unikandanunni, Vivek
name: Medapalli, Rajasekhar
name: Fullerton, Eric E.
name: Carva, Karel
name: Oppeneer, Peter M.
name: Bonetti, Stefano
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate the ultrafast spin dynamics in an epitaxial hcp(1100) cobalt thin film. By performing pump-probe magneto-optical measurements with the magnetization along either the easy or hard magnetic axis, we determine the demagnetization and recovery times for the two axes. We observe a 35% slower dynamics along the easy magnetization axis, which we attribute to magneto-crystalline anisotropy of the electron-phonon coupling, supported by our ab initio calculations. This points towards an unambiguous and previously undisclosed role of anisotropic electron-lattice coupling in ultrafast magnetism.
description: Main text: 6 pages, 4 figures. Supplemental Material: 6 pages, 7 figures
Partial ownership arrangements in the Japanese automobile industry; 1990-2000
Creators: name: Ono, Hiroshi
name: Nakazato, Takuya
name: Davis, Colin
name: Alley, Wilson
name: Ono, Hiroshi
name: Nakazato, Takuya
name: Davis, Colin
name: Alley, Wilson
Publisher: name: Unknown
Year: 2004
Subjects: subject: partial ownership arrangements
subject: price-cost margin
subject: technology transfers

description: The end of the 1990’s saw a number of foreign automobile manufacturers become the largest shareholders in several Japanese automobile manufacturers. It seems logical to conclude that a firm only enters into a partial ownership arrangement (POA) if it is profit maximizing. However, research to date has treated POAs as if exogenous to the model. This paper develops a model that assumes POAs are determined endogenously. Data for the Japanese automobile industry are then used to investigate the factors that determine whether a firm enters into a POA, and the effects a POA has on the price-cost margin. The findings of this paper suggest that while both foreign and domestic firms take an interest in product mix when exploring POAs in the Japanese market, they have differing profit incentives. Furthermore, the level of ownership has a positive effect on POAs.
Distillers Dried Grain Product Innovation and Its Impact on Adoption, Inclusion, Substitution, and Displacement Rates in a Finishing Hog Ration
Creators: name: Fabiosa, Jacinto F.
name: Fabiosa, Jacinto F.
Publisher: name: Unknown
Year: 2008
Subjects: subject: biofuel
subject: DDGS
subject: DG
subject: distillers dried grain with solubles
subject: distillers grain
subject: feeder-finisher
subject: optimal feed ration.

description: This study finds that the use of distillers dried grain with solubles (DDGS) as feed is greatly influenced by the development of DDGS products that are available in the market. We find that newer-generation DDGS products have a higher optimal inclusion rate, reaching the maximum allowable rate of 20% for swine, and they have a higher displacement rate of 0.23 for soymeal and 0.93 for corn. Although both traditional and newer-generation DDGS products are primarily used as a corn substitute for energy, it will take only a relatively small change in the price or matrix A (or both) for the newer-generation DDGS to primarily substitute for soymeal for the limiting amino acid, lysine. In contrast, traditional DDGS products have a lower optimal inclusion rate of 7%, and they have a lower displacement rate of 0.75 for corn and 0.08 for soy meal. This product is primarily used as a corn substitute for energy. When traditional DDGS is introduced in a feed ration, total feed cost declines by 2.64%, or a reduction of $0.29 per cwt of feed. This translates into a $2.17 per head savings in feed cost in a feeder-to-finish operation. Using newer-generation DDGS reduces feed cost by 9.88%, or a reduction of $1.08 per cwt of feed, saving feeder-finisher operations $8.06 per head. This study suggests that as a substitute product, the price of DDGS will track the price of both corn and soymeal. It will be more of the former until new-generation DDGS can be used as a primary substitute for soymeal and take a dominant share of the market. Finally, this study clearly points to the critical importance of DDG product innovation to promote widespread and optimal use of DDGS as a feed ingredient, thereby alleviating the food-feed-fuel trade-off.
[Halle (Saale), Universitäts- und Landesbibliothek Sachsen-Anhalt, Morbio 4 (109 e)]
Creators: name: Hugolinus De Sancto Marco
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 1335
Subjects: subject: Bischofsurkunde
subject: Notarsurkunde
subject: Urkunde
subject: 090

description: Hugolinus de Sancto Marco, Bischof von Cremona, bestätigt, von Gerardus, Abt des Klosters St. Thomae in Cremona, eine Abgabe erhalten zu haben.
Renormalization-group improved evolution of the meson distribution amplitude at the two-loop level
Creators: name: Bakulev, Alexander P.
name: Stefanis, N. G.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss the two-loop evolution of the flavor-nonsinglet meson distribution amplitude in perturbative QCD. After reviewing previous two-loop computations, we outline the incompatibility of these solutions with the group property of the renormalization-group transformations. To cure this deficiency, we compute a correction factor for the non-diagonal part of the meson evolution equation and prove that with this modification the two-loop solution conforms with the group properties of the renormalization-group transformations. The special case of a fixed strong coupling (no Q^2 dependence) is also discussed and comparison is given to previously obtained results.
description: 23 pages, 9 figures, Revtex4 class. Discussion of relation to conformal symmetry enlarged and references added. Matches version to be published in Nucl. Phys. B
Development of Protective Adhesive for Gloves
Creators: name: Silva, Antonia Homrich Da
name: Santos, Caroline Bittencourt Dos
name: Inaciane Teixeira Da Silva
name: Cristiane Krause Santin
name: Souza, José De
Publisher: name: figshare
Year: 2020
Subjects: subject: Mechanical Engineering
subject: FOS: Mechanical engineering

description: This paper presents a study on the development of an adhesive with specific characteristics such as: the shear strength, flexibility and the practicality of being adhered to the glove according to the need of its user. In view of this, the project has the problem of making a protective coat for gloves that is resistant to cutting, flexible, so as not to disturb the movement, and that can be applied in any region of the hand, according to the need of its user. Consequently, its objectives are: to study the materials to complete this task, as well as to validate its operation through tests and to use materials from other operations. The methodology was based on the collection of waste from the grinding operation and, at first, its pressing with a plastic bag. As this operation failed, it was attempted to dissolve the bag and separately impregnate the iron powder and the residue in that solution to obtain a homogeneous film, thereby making it one of the layers of the adhesive. The results obtained in the first test were unsatisfactory because the pressed layers did not unite and the second test is being performed; therefore, the study is not yet complete.
Energy controlled insertion of polar molecules in dense fluids
Creators: name: De Fabritiis, Gianni
name: Delgado-Buscalioni, Rafael
name: Coveney, Peter V.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Biomolecules (q-bio.BM)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: We present a method to search low energy configurations of polar molecules in the complex potential energy surfaces associated with dense fluids. The search is done in the configurational space of the translational and rotational degrees of freedom of the molecule, combining steepest-descent and Newton-Raphson steps which embed information on the average sizes of the potential energy wells obtained from prior inspection of the liquid structure. We perform a molecular dynamics simulation of a liquid water shell which demonstrates that the method enables fast and energy-controlled water molecule insertion in aqueous environments. The algorithm finds low energy configurations of incoming water molecules around three orders of magnitude faster than direct random insertion. This method is an important step towards dynamic simulations of open systems and it may also prove useful for energy-biased ensemble average calculations of the chemical potential.
O papel da mulher na agricultura familiar: dois estudos de caso
Creators: name: Medeiros, Rosa Maria
name: Ribeiro, Eduardo Magalhaes
name: Medeiros, Rosa Maria
name: Ribeiro, Eduardo Magalhaes
Publisher: name: Unknown
Year: 2003
Subjects: subject: family farming
subject: female labour
subject: rural woman.

description: This articles discusses aspects of female labour in the strategies developed by farming families from Minas so as to ensure both access to and permanence in farmlands. Case studies have been carried out in two communities- one of which being an old constitution, Boa Vista, in Itaguara, MG, the other being a newly consituted unit, Assentamento Dom Orione, in Betim, MG- where it was possible to observe the importance of women’s role with their struggle and labor in the composition of family strategies. The Boa Vista community has been experiencing changes in the families’ production dynamics due to the decline in income from farming activities, causing handcraft work to gain greater and greater economic importance. Such activity involves all family members, but it is the women who outstand for coordinating the related activities and for being, themselves, the artisans, the connoisseurs of the office. The new importance of handcraft work done in loomshas redefined gender relations in and out of the family nucleus. However, that does not bring deeper changes in cultural patterns. In spite of modifying men and women, they not only keep, but also reaffirm gender relations, female subordination included. As for the life history of the families from Assentamento Dom Orione brings to light aspects of alterations in women’s bahaviour patterns and roles. Of rural origin, these families have undergone intense migratory processes, motivated by the search for land and work. Women stood for labour force of communitary organization and played a fundamental role in children raising and family care. It is important to mention that the community in question is located in the metropolitan boundaries of Belo Horizonte, and the families are devoted mainly to farming activities, the non-farming activities performed by them not being the chief ones. Thus, female farm work becomes auxiliary and subordinated to men’s. Besides, women’s participation in the gestion of the community is of secondary importance, occupying positions of smaller political strength. The farming environment in this rural space which lies next to the urban space strongly controls the role played by women.
Nuclear dependence of transverse single-spin asymmetry of charged hadrons in polarized p+p, p+Al and p+Au collisions in PHENIX
Creators: name: Bok, Jeongsu
Publisher: name: Zenodo
Year: 2020
Subjects: qm19
phenix
spin
rhic
transverse spin asymmetry
muon arms
p+p
p+al
p+au

description: Poster presented at the Quark Matter 2019 conference. Transverse Single Spin Asymmetry (TSSA) describes the azimuthal-angular dependence of particle production relative to the transverse spin direction of the polarized proton in proton-proton collisions.
Interplay of the exciton and electron-hole plasma recombination on the photoluminescence dynamics in bulk GaAs
Creators: name: Amo, A.
name: Martin, M. D.
name: Vina, L.
name: Toropov, A. I.
name: Zhuravlev, K. S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present a systematic study of the exciton/electron-hole plasma photoluminescence dynamics in bulk GaAs for various lattice temperatures and excitation densities. The competition between the exciton and electron-hole pair recombination dominates the onset of the luminescence. We show that the metal-to-insulator transition, induced by temperature and/or excitation density, can be directly monitored by the carrier dynamics and the time-resolved spectral characteristics of the light emission. The dependence on carrier density of the photoluminescence rise time is strongly modified around a lattice temperature of 49 K, corresponding to the exciton binding energy (4.2 meV). In a similar way, the rise-time dependence on lattice temperature undergoes a relatively abrupt change at an excitation density of 120-180x10^15 cm^-3, which is about five times greater than the calculated Mott density in GaAs taking into account many body corrections.
description: 15 pages, 7 figures, submitted to Phys. Rev. B
Representações sociais sobre os sistemas de gestão ambiental: uma análise em agroindústrias do setor lácteo sul-mineiro
Creators: name: Souza, Carla Regina De
name: Brito, Mozar Jose De
name: Cappelle, Monica Carvalho Alves
name: Amancio, Robson
name: Souza, Carla Regina De
name: Brito, Mozar Jose De
name: Cappelle, Monica Carvalho Alves
name: Amancio, Robson
Publisher: name: Unknown
Year: 2003
Subjects: subject: Social representations
subject: environmental management systems
subject: and organizations.

description: This paper objectified to bring to light the milk industry managers’ social representations on the environmental management. For such, the systematization of a theoretic-methodological framework was adopted, whose interpretation shows that the environmental management, in the view of the researched milk industries managers, runs three complementary representations. In the first one, the environmental management emerges as an organizational practice which necessarily aims the execution of state legal environmental norms. In the second one, the same process refers to the managers’ imagination as an organizational strategy which may contribute for gains in competitive advantages in the market, which is becoming more and more demanding when it comes to environmental preservation questions. In the third and last representation, the environmental management is perceived as an organizational practice that extrapolates the market limits, as it opens space for the adoption of a socially responsible business attitude.
Propagating Speed of Primordial Gravitational Waves
Creators: name: Giarè, William
name: Renzi, Fabrizio
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Primordial Gravitational Waves, i.e. a background of metric perturbations sourced by the quantum inflationary fluctuations, if measured, could both provide a substantial evidence for primordial inflation and shed light on physics at extremely high energy scales. In this work we focus on their propagating speed. Using an effective field theory approach we introduce a time-dependent propagating speed $c_{\rm T}(t)$ showing that also small deviations from the General Relativity (GR) prediction $c_{\rm T}(t) = c$ can lead to testable consequences. We derive a set of equations that relate the propagating speed and its time dependence to the inflationary parameters and that generalize the usual slow roll consistency relations. Imposing the new generalized consistency relations and combining small and large scales data, we derive model independent constraints on inflation with non-trivial primordial tensor speed. In particular we constrain its scale dependence to be $d\log c_{\rm T} / d\log k=0.082^{+0.047}_{-0.11}$ at 68% C.L. while we only derive the lower bound $c_{\rm T}>0.22\,c$ at 95% C.L. . We also constrain the tensor-to-scalar ratio at the pivot scale $k_*=0.05\rm{Mpc}^{-1}$ to be $r<0.0599$ at 95% C.L. in agreement with the result provided by the Planck collaboration. Thanks to a proper small scale parameterization of the tensor spectrum we derive stringent constraints on the tensor tilt $n_{\rm T}=-0.084^{+0.10}_{-0.047}$ at 68% C.L. and on its runnings $α_{\rm T}=d\,n_{\rm T}/d\log k=0.0141^{+0.0035}_{-0.021}$ and $β_{\rm T}=d\,α_{\rm T}/d\log k= -0.0061^{+0.010}_{-0.0014}$ both at 68% C.L. Our results show a remarkable agreement with the standard slow roll predictions and prove that current data can significantly constrain deviations from GR on the inflationary energy scales.
description: 25 pages, 8 figures. Edited to match Phys. Rev. D published version
The sub-energetic GRB 031203 as a cosmic analogue to GRB 980425
Creators: name: Soderberg, A. M.
name: Kulkarni, S. R.
name: Berger, E.
name: Fox, D. W.
name: Sako, M.
name: Frail, D. A.
name: Gal-Yam, A.
name: Moon, D. S.
name: Cenko, S. B.
name: Yost, S. A.
name: Phillips, M. M.
name: Persson, S. E.
name: Freedman, W. L.
name: Wyatt, P.
name: Jayawardhana, R.
name: Paulson, D.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Over the six years since the discovery of the gamma-ray burst GRB 980425, associated with the nearby (distance, ~40 Mpc) supernova 1998bw, astronomers have fiercely debated the nature of this event. Relative to bursts located at cosmological distances, (redshift, z~1), GRB 980425 was under-luminous in gamma-rays by three orders of magnitude. Radio calorimetry showed the explosion was sub-energetic by a factor of 10. Here, we report observations of the radio and X-ray afterglow of the recent z=0.105 GRB 031203 and demonstrate that it too is sub-energetic. Our result, when taken together with the low gamma-ray luminosity, suggest that GRB 031203 is the first cosmic analogue to GRB 980425. We find no evidence that this event was a highly collimated explosion viewed off-axis. Like GRB 980425, GRB 031203 appears to be an intrinsically sub-energetic gamma-ray burst. Such sub-energetic events have faint afterglows. Intensive follow-up of faint bursts with smooth gamma-ray light curves (common to both GRBs 031203 and 980425) may enable us to reveal their expected large population.
description: To Appear in Nature, August 5, 2004
Claw device adjustable to walking sticks for objects handling
Creators: name: Fleck, Eduardo Finger
name: Giacomin, Alexandre
name: Souza, José De
name: Mombach, Augusto
Publisher: name: figshare
Year: 2020
Subjects: subject: 91007 Manufacturing Robotics and Mechatronics (excl. Automotive Mechatronics)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The following article presents a prototype for an electrical claw system attachable to Canadian canes. This project occurs at the Fundação Escola Técnica Liberato Salzano Vieira da Cunha in Novo Hamburgo with the intent of figuring out if there was a way of developing a device attachable to Canadian canes to help users with motor deficiency on the leg retrieve belonging on the floor. The knowledge necessary for this project was based on mechanical engineering knowledge of pulleys and electronic knowledge of motors and the prototyping platform Arduino. The research had two phases: the software prototyping and planning and the construction of the prototype. We were able to conclude the prototype, although there remains a big space for improvement soon.
A indústria do turismo: história, características e tendências
Creators: name: Mendonca, Maria Cristina Angelico De
name: Batalha, Mario Otavio
name: Santos, Antonio Carlos Dos
name: Mendonca, Maria Cristina Angelico De
name: Batalha, Mario Otavio
name: Santos, Antonio Carlos Dos
Publisher: name: Unknown
Year: 2003
Subjects: subject: industry
subject: tourism
subject: rural sector.

description: This present paper aims to present a historical evolution of the tourism industry, focusing on the reflexes of the industrial management paradigms as well as those of some technological innovations on it, show its features emphasizing its differences in relation to other industry forms and reflect on its trends in Brazil, considering the participation of the rural segment. Through the historical evolution, one verifies that the movements of other forms of industry, as far as growth is concerned, technological innovations and changes in management patterns have reflected directly on tourism industry. There is a trend in formation of networks, as a managerial alternative to small and medium size companies, and it happens to adapt to the tourism industry’s features. In Brazil one also verifies that its trajectory follows the same path as former Europe’s and the trend is also the countryside’s tranquility for similar reasons. As for the reflections, they focus basically on the managerial challenge that rural producers will face ahead due to the tourism industry’s features, to the features of the product and its production, such as being responsible for avoiding its occurring in the rural environment, which is where he makes his living, and which still features such valuable natural resources, so as to avoid undergoing consequences of negative experiences similar to those from the past, and keeping it from being destroyed even further than it has been so far.
Radiodetection of Cosmic Ray Extensive Air Showers
Creators: name: Ardouin, D.
name: Belletoile, A.
name: Charrier, D.
name: Dallier, R.
name: Denis, L.
name: Eschstruth, P.
name: Gousset, T.
name: Haddad, F.
name: Lamblin, J.
name: Lautridou, P.
name: Lecacheux, A.
name: Monnier-Ragaiggne, D.
name: Rahmani, A.
name: Ravel, O.
name: Collaboration, the Codalema
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the characteristics and performance of a demonstration experiment devoted to the observation of ultra high- energy cosmic ray extensive air showers using a radiodetection technique. In a first step, one antenna narrowed band filtered acting as trigger, with a 4 $σ$ threshold above sky background-level, was used to tag any radio transient in coincidence on the antenna array. Recently, the addition of 4 particle detectors has allowed us to observe cosmic ray events in coincidence with antennas.
Dielectric constant of supercritical water in a large pressure-temperature range
Creators: name: Hou, Rui
name: Quan, Yuhui
name: Pan, Ding
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: A huge amount of water at supercritical conditions exists in Earth's interior, where its dielectric properties play a critical role in determining how it stores and transports materials. However, it is very challenging to obtain the static dielectric constant of water, $ε_0$, in a wide pressure-temperature (P-T) range as found in deep Earth either experimentally or by first-principles simulations. Here, we introduce a neural network dipole model, which, combined with molecular dynamics, can be used to compute P-T dependent dielectric properties of water as accurately as first-principles methods but much more efficiently. We found that $ε_0$ may vary by one order of magnitude in Earth's upper mantle, suggesting that the solvation properties of water change dramatically at different depths. There is a subtle interplay between the molecular dipole moment and the dipolar angular correlation in governing the change of $ε_0$. We also calculated the frequency-dependent dielectric constant of water in the microwave range, which, to the best of our knowledge, has not been calculated from first principles, and found that temperature affects the dielectric absorption more than pressure. Our results are of great use in many areas, e.g., modelling water-rock interactions in geochemistry. The computational approach introduced here can be readily applied to other molecular fluids.
description: The trained NND model is openly available at https://github.com/angstrom-group/NN-Dipole-Model
Modelos de séries temporais aplicados a índices de preços hospitalares do Hospital da Universidade Federal de Santa Catarina
Creators: name: Cirillo, Marcelo Angelo
name: Safadi, Thelma
name: Cirillo, Marcelo Angelo
name: Safadi, Thelma
Publisher: name: Unknown
Year: 2003
Subjects: subject: ARIMA model
subject: intervention analysis
subject: hospital prices

description: The basic principle of the management of institutions directed to the public attendance consists of sound information which is able to help in decision-making. Thus, the knowledge in the managemental aspect is widened enabling for improvement in service quality and reduction in expenses. It is aimed to carry out a study, showing the viability of the application of time series so that the forecasts will contribute to decision-making in the hospital context. For the accomplishment of this work, the hospital price series of the Federal University of Santa Catarina hospital was investigated, this one being made up of remarks concerning the Hospital Price Indices (HIP), portraying the monthly variations of costs related with medicines, consumption material and other services. Thus, the ARIMA models were adjusted both with and without intervention for the period of November, 1993 through December, 2001 and forecasts were made for the months of January to April of 2002.
UAV Path Planning for Wireless Data Harvesting: A Deep Reinforcement Learning Approach
Creators: name: Bayerlein, Harald
name: Theile, Mirco
name: Caccamo, Marco
name: Gesbert, David
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Information Theory (cs.IT)
subject: Robotics (cs.RO)
subject: Signal Processing (eess.SP)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Autonomous deployment of unmanned aerial vehicles (UAVs) supporting next-generation communication networks requires efficient trajectory planning methods. We propose a new end-to-end reinforcement learning (RL) approach to UAV-enabled data collection from Internet of Things (IoT) devices in an urban environment. An autonomous drone is tasked with gathering data from distributed sensor nodes subject to limited flying time and obstacle avoidance. While previous approaches, learning and non-learning based, must perform expensive recomputations or relearn a behavior when important scenario parameters such as the number of sensors, sensor positions, or maximum flying time, change, we train a double deep Q-network (DDQN) with combined experience replay to learn a UAV control policy that generalizes over changing scenario parameters. By exploiting a multi-layer map of the environment fed through convolutional network layers to the agent, we show that our proposed network architecture enables the agent to make movement decisions for a variety of scenario parameters that balance the data collection goal with flight time efficiency and safety constraints. Considerable advantages in learning efficiency from using a map centered on the UAV's position over a non-centered map are also illustrated.
description: Code available under https://github.com/hbayerlein/uav_data_harvesting, IEEE Global Communications Conference (GLOBECOM) 2020
DAMA detection claim is still compatible with all other DM searches
Creators: name: Gelmini, Graciela B.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We show that the annual modulation signal observed by DAMA can be reconciled with all other negative results from dark matter searches with a conventional halo model for particle masses around 5 to 9 GeV. We also show which particular dark matter stream could produce the DAMA signal.
description: Talk given at TAUP2005, Sept. 10-14 2005, Zaragoza (Spain). 3 pages, 4 figures
Análise de conteúdo e análise de discurso nas ciências sociais
Creators: name: Cappelle, Monica Carvalho Alves
name: Melo, Marlene Catarina De Oliveira Lopes
name: Goncalves, Carlos Alberto
name: Cappelle, Monica Carvalho Alves
name: Melo, Marlene Catarina De Oliveira Lopes
name: Goncalves, Carlos Alberto
Publisher: name: Unknown
Year: 2003
Subjects: subject: analysis of contents
subject: analysis of speech
subject: social sciences

description: Transforming collected raw-state data into research results involves the use of certain precedures so as to systematize, categorize and enable its analysis by the researcher.In the specific case of the analysis of communications, adequate mechanisms are demanded so one is able to find in data obtained by means of interviews, messages and documents in general information that illustrate, explain or help bring investigated phenomena to light. Among such mechanisms are the analysis of contents and the analysis of speech as theorical-methodological propositions, intending to surpass their status as “simple techniques of analysis” and compose a field of knowledge. Thus, this present text has been elaborated aiming to providing a better understanding about what constitutes the contents and speech analyses, so as to providing researchers with some subsidy for their adequate utilization. For such, the authors intended to approach these two fields of knowledge, primarily giving their definition, contextualizing them and reporting their historical origins. Next, the authors sought to dealing with each one’s utilization, operationalization and organization, as well as with their specificities. Later, some comparisons between the analisys of contents and the analysis of speech were elaborated, aiming to facilitate the reader’s understanding. Last, some final considerations were woven which deal with the limitations of this work in the sense of trying to approach, in a short essay, two areas of knowledge about which a vast amplitude of studies, publishings and research already exist.
Teaching with Code: Globular Cluster Distance Lab
Creators: name: Newland, James
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Modern astronomy increasingly depends on computational thinking. Although some astronomy courses for undergraduates use computing, high school astronomy courses often have little computing. Created as a part of a research experience for teachers in astronomy and another in computer science, this project leverages robotic telescope images and astronomical algorithms to determine the distance to a star cluster using variable stellar photometry. Students investigate Python and Jupyter Notebook to analyze astronomical images to calculate the interstellar distance to a star cluster across the Milky Way. Students will learn how to write Python code that runs in a Jupyter Notebook such that the brightness of stars in an astronomical image can be determined. The real astronomical image data will be directly manipulated and analyzed by code the students create. Student project files and teacher solution files are provided. Code is open source, and materials are available for classroom use.
description: This submission is for inclusion in the AAS 236 focus issue. 3 pages. Result of poster presentation at 236th meeting of the American Astronomical Society in June 2020
Comments on BRST quantization of strings
Creators: name: Craps, Ben
name: Skenderis, Kostas
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The BRST quantization of strings is revisited and the derivation of the path integral measure for scattering amplitudes is streamlined. Gauge invariances due to zero modes in the ghost sector are taken into account by using the Batalin-Vilkovisky formalism. This involves promoting the moduli of Riemann surfaces to quantum mechanical variables on which BRST transformations act. The familiar ghost and antighost zero mode insertions are recovered upon integrating out auxiliary fields. In contrast to the usual treatment, the gauge-fixed action including all zero mode insertions is BRST invariant. Possible anomalous contributions to BRST Ward identities due to boundaries of moduli space are reproduced in a novel way. Two models are discussed explicitly: bosonic string theory and topological gravity coupled to the topological A-model.
description: 23 pages, latex; v2: typos fixed, footnote and reference added
𝜋0 Azimuthal Anisotropy in Central d+Au Collisions at 200GeV with PHENIX at RHIC
Creators: name: Drees, Axel
Publisher: name: Zenodo
Year: 2020
Subjects: qm19
phenix
anisotropy
rhic
π0
flow
d+au

description: Poster presented at the Quark Matter 2019 conference. The study of anisotropic flow provides strong constrains to the evolution of the medium produced in heavy ion collisions and its event-by-event geometry fluctuations. These observables have long been related to collective behavior in the formed medium. Recent results both at RHIC and LHC provide strong evidence for the formation of such medium in smaller systems.
Identifying Risk Factors Affecting Weather- and Disease-Related Losses in the U.S. Farm-Raised Catfish Industry
Creators: name: Hanson, Terrill R.
name: Shaik, Saleem
name: Coble, Keith H.
name: Edwards, Seanicaa
name: Miller, J. Corey
name: Hanson, Terrill R.
name: Shaik, Saleem
name: Coble, Keith H.
name: Edwards, Seanicaa
name: Miller, J. Corey
Publisher: name: Unknown
Year: 2008
Subjects: subject: Livestock Production/Industries
subject: Risk and Uncertainty
subject: aquaculture
subject: tobit
subject: risk management
subject: columnaris
subject: enteric septicemia of catfish
subject: weather losses

description: Two double-limit tobit models are used to identify significant risk factors that most affect farm-raised catfish losses from weather-related events and from disease outbreaks. Results of the weather loss model indicate that the variables for operator education level, number of ponds, pond water depth, production management strategy, past experience with severe losses from low oxygen levels from off-farm power outages, past experience with severe losses from diseases, and being in the South are statistically significant. Results of the disease loss model indicate that the variables for operator experience and pond water depth are significant. De-velopment of models explaining weather and disease losses through observable variables pro-vides a better understanding of the interrelation between the loss perils and explanatory vari-ables so management strategies can be developed to mitigate losses from identified risk factors.
Willingness to Pay for a Potential Insurance Policy: Case Study of Trout Aquaculture
Creators: name: Shaik, Saleem
name: Coble, Keith H.
name: Hudson, Darren
name: Miller, James C.
name: Hanson, Terrill R.
name: Sempier, Stephen H.
name: Shaik, Saleem
name: Coble, Keith H.
name: Hudson, Darren
name: Miller, James C.
name: Hanson, Terrill R.
name: Sempier, Stephen H.
Publisher: name: Unknown
Year: 2008
Subjects: subject: Livestock Production/Industries
subject: Risk and Uncertainty
subject: willingness to pay
subject: subjective elicitation and survey data
subject: aquaculture trout insurance

description: Using trout producer survey data and the contingent valuation method, we estimate willing-ness to pay for a potential insurance policy. The survey was conducted in 2005 across the United States; 268 producers completed the survey instrument, resulting in a response rate of 81 percent. Design of the contingent valuation method takes into account two coverage levels and four premium rates. Using standard willingness-to-pay techniques, we assess the premium rate that producers with varying practices and regions are willing to pay for two different cov-erage levels of insurance. In general, trout producers appear willing to pay premium rates of 2 to 11 percent for these coverage levels.
An Insurance Approach to Risk Management in the Ethanol Industry
Creators: name: Paulson, Nicholas D.
name: Babcock, Bruce A.
name: Hart, Chad E.
name: Hayes, Dermot J.
name: Paulson, Nicholas D.
name: Babcock, Bruce A.
name: Hart, Chad E.
name: Hayes, Dermot J.
Publisher: name: Unknown
Year: 2008
Subjects: subject: Resource /Energy Economics and Policy
subject: Risk and Uncertainty
subject: corn-based ethanol
subject: insurance
subject: risk management
subject: correlation
subject: Monte Carlo

description: The vast majority of crop and revenue insurance policies sold in the United States are single-crop policies that insure against low yields or revenues for each crop grown on the farm. But, increasingly, producer income is based more on the value of crops that have been converted into a value-added product such as ethanol. Moreover, the recent increases in energy and com-modity price levels and volatilities emphasize the importance of risk management to ethanol investors. This paper uses an insurance approach to outline a risk management tool which mimics the gross margin level of a typical corn-based ethanol plant. The gross margin, pre-mium, and indemnity levels are calculated on a per bushel basis to enable producers/investors to utilize the product based on their ownership share in the production facility. The fair pre-mium rates are shown to be quite sensitive with respect to corn and energy price levels and volatilities.