cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Observation of $B^0 \to D^{*-} (5π)^+$, $B^+ \to D^{*-} (4π)^{++}$ and $B^+ \to \bar{D}^{*0} (5π)^+$
Creators: name: Majumder, G.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We report the first observation of a number of decay modes of the B meson, namely $B^0 \to D^{*-} (5π)^+$, $B^+ \to D^{*-} (4π)^{++}$ and $B^+ \to \bar{D}^{*0} (5π)^+$, where $(nπ)$ implies the combination of n charged pions. The analysis is based on a 140 fb$^{-1}$ data sample collected at the $Υ(4S)$ resonance with the Belle detector at KEKB. We measure ${\cal{B}}(B^0 \to D^{*-} (5π)^+) = (4.72 \pm 0.59 \pm 0.71) \times 10^{-3}$, ${\cal{B}}(B^+ \to D^{*-} (4π)^{++} = (2.56 \pm 0.26 \pm 0.33) \times 10^{-3}$ and ${\cal{B}}(B^+ \to \bar{D}^{*0} (5π)^+) = (5.67 \pm 0.91 \pm 0.85) \times 10^{-3}$. We also provide improved measurements of the branching fractions for the decay modes $B^0 \to D^{*-} (3π)^+$, $B^+ \to \bar{D}^{*0} (3π)^+$ and $B^0 \to \bar{D}^{*0} (4π)^0$.
description: 5 pages, 2 figures, Typo. KEK Preprint 2004-45, Belle Preprint 2004-25, submitted to PRD(R)
A Governança no Arranjo Produtivo de Grãos de Santarém e Belterra, Estado do Pará: uma análise a partir do grão soja
Creators: name: Oliveira, Cyntia Meireles De
name: Santana, Antônio Cordeiro De
name: Oliveira, Cyntia Meireles De
name: Santana, Antônio Cordeiro De
Publisher: name: Unknown
Year: 2012
Subjects: subject: Agribusiness
subject: Cluster
subject: institutions and actors
subject: transaction costs.

description: The purpose of this study was to examine the governance structures established throughout the Local Arrangement Productive of Grains in Santarém and Belterra, from interactions between the institutional environment and social actors, and commercial transactions occurring in the arrangement. Data were collected through structured questionnaire, which was applied to 20 grain producers, and the analysis of results was developed from Williamson (1993), Williamson (1999), Humphrey and Schmitz (2000), Kaplinsky (2000) and Schmitz (2000). Results show that governance throughout the chain occurs with the leadership of Cargill Agrícola S/A company, and that the executive governance developed by growers occurs without an entrepreneurial action, which hinders the creation of sustainable competitive advantages in the long-term.
Mudanças Institucionais e Produção Familiar na Cadeia Produtiva do Leite no Oeste Catarinense
Creators: name: Oliveira, Luis Fernando Tividini
name: Silva, Sandro Pereira
name: Oliveira, Luis Fernando Tividini
name: Silva, Sandro Pereira
Publisher: name: Unknown
Year: 2012
Subjects: subject: Agribusiness
subject: Institutional environment
subject: family farming
subject: milk production chain
subject: Pronaf
subject: IN51.

description: This paper aims to analyze how family farmers behave facing significant changes in the institutional environment of milk production chain. In this sense, we investigated main consequences and impacts on the social and productive organization of milk producing families as a result of the Institution Normative 51 by Ministry of Agriculture in the western region of Santa Catarina state. We used the approach of New Institutional Economics (NIE) and field research with strategic actors involved in the dairy production in the region. We concluded that the IN51 decisively influences the form of organization and participation of family farming in the milk production chain.
Additional file 1 of Community Connectors (CCx): the strategies employed by peer to peer connectors to foster relationships with early years caregivers to improve universal early child health and development
Creators: name: Mills, C. F.
name: E. Lowrie
name: K. Kinloch
name: E. Hall
Publisher: name: figshare
Year: 2021
Subjects: subject: Sociology
subject: FOS: Sociology
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 1. Interview Guide.
Does it really make a difference? Health care utilization with two high deductible health care plans: Health care utilization with two high deductible health care plans
Creators: name: Pichler, Stefan
name: Ruffner, Jan
Publisher: name: ETH Zurich
Year: 2016
Subjects: Advantageous selection
Moral hazard
WIRTSCHAFTLICHE ASPEKTE + FINANZIELLE ASPEKTE (ALLGEMEIN)
Deductible
Health insurance
ÖFFENTLICHES GESUNDHEITSWESEN, GESUNDHEITSPFLEGE UND UNFALLSCHUTZ
PUBLIC HEALTH, HEALTH CARE AND ACCIDENT PREVENTION
Instrumental variables
ECONOMIC ASPECTS + FINANCIAL ASPECTS (GENERAL)
info:eu-repo/classification/ddc/330
info:eu-repo/classification/ddc/610
Economics
Medical sciences, medicine

description: KOF Working Papers, 404
Eighth-Order Foldy-Wouthuysen Transformation
Creators: name: Jentschura, Ulrich D.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The calculation of higher-order binding corrections to bound systems is a fundamental problem of theoretical physics. For any nonrelativistic expansion, one needs the Foldy-Wouthuysen Transformation which disentangles the particle and the antiparticle degrees of freedom. This transformation is carried out here to eighth order in the momenta, or, to eighth order in the momentum operators, which is equivalent to the eighth order of the fine-structure constant. Matrix elements of the eighth-order terms are evaluated for F_5/2 and F_7/2 states in hydrogenlike ions and compared with the Dirac-Coulomb energy levels.
description: 9 pages; RevTeX; discussion in Appendix A enhanced; accepted for publication by Physical Review A
Mudança Tecnológica na Agricultura: uma revisão crítica da literatura e o papel das economias de aprendizado
Creators: name: Vieira Filho, José Eustáquio Ribeiro
name: Silveira, José Maria Ferreira Jardim Da
name: Vieira Filho, José Eustáquio Ribeiro
name: Silveira, José Maria Ferreira Jardim Da
Publisher: name: Unknown
Year: 2012
Subjects: subject: Agribusiness
subject: Technological change
subject: knowledge
subject: absorptive capacity
subject: innovation.

description: This paper presents a critical review on the literature related to technological change in agriculture, and makes a brief description of the alternative approach for agricultural growth. In the traditional literature, technological diffusion, productive dualism and induced innovation are studied. In the dynamic view, the alternative approach of agricultural growth is discussed together with the importance of innovation process and the ability to explore external knowledge. The major limitation of traditional thinking about agricultural growth is the absence of explanations on innovation and learning process. The agricultural sector must recognize that not all technological development and new knowledge come with the acquisition of inputs. Agriculture does not cater to the means of agents who will simply be the receptors of technology. The innovation process within agriculture is organized through complex, production systems, as well as institutions, both private and public, which promote knowledge. Investments and experimentation activities occur within the unit of production, thus creating a wider knowledge stock and a larger absorptive capacity, in addition to fostering the private appropriation of productive gains.
The role of prey quality in rhinoceros auklet (Cerorhinca monocerata) productivity
Creators: name: Beaubier, Jessica
Publisher: name: University of British Columbia
Year: 2010

description: While shifts in the species composition of seabird nestling diets are generally well described, their energetic implications for nestlings are poorly understood due to a lack of information on relative prey quality. I investigated how prey quality related to interannual differences in rhinoceros auklet reproductive success at Triangle Island, British Columbia. I first estimated the energy density and proximate composition of the 4 main prey types (Pacific sand lance (Ammodytes hexapterus), Pacific saury (Cololabis saira), juvenile rockfish species (Sebastes spp.), and juvenile salmon (Oncorhynchus spp.) fed to rhinoceros auklet nestlings at Triangle Island. I then developed models of prey energy content and used them to estimate average energy content and quality of rhinoceros auklet nestling meals in two years of contrasting diets. I then tested to see if diet differences correlated with differences in chick growth and fledging characteristics. Prey types varied in energy density, both within and between species, which discounts using relative meal biomass as a proxy for relative meal energy content. Both mass and energy of nestling meals were lower in 2003 than in 2004 and varied non-linearly over the course of each breeding season. Average diet quality (kJ/g) did not vary between years and interannual differences in energy were driven by differences in average meal mass. Differences in prey availability may have led to large differences in productivity between years, but primarily by affecting hatching success rather than chick growth. Of nestling variables measured, only tarsus length varied between years: 2003 tarsi at fledge were shorter than those of 2004. Prey availability was likely more important than prey quality in driving annual production during these two years of study at Triangle Island.
Preparation of a mixed Al/Sc nano-oxide derived from the bauxite residue (red mud) via the sulfuric acid roastingะleachingะprecipitation process
Creators: name: Habibpour, Razieh
Publisher: name: Metallurgy and Materials Science Research Institute Chulalongkorn University
Year: 2021
Subjects: Bauxite residue
Red mud
Sulfuric acid roasting
Precipitation
Al/Sc nano-oxide

description: Journal of Metals, Materials and Minerals, 31, 1, 25-34
Competing long-range interactions and spin vector chirality in spin-chains
Creators: name: Vernek, E.
name: Ávalos-Ovando, O.
name: Ulloa, S. E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Studies of competing orders in 1D magnetic chains have attracted considerable attention in recent years, as the presence of long-range Heisenberg interactions is found to allow interesting quantum phase transitions. We investigate here the role of spin-orbit effects by considering spin-1/2 chains in the presence of both collinear and non-collinear long-range interactions. By employing exact diagonalization and density matrix renormalization group calculations we investigate the rich phase diagram of this system. We find transitions from collinear to transverse magnetic correlated order as the strength of the non-collinear coupling increases, accompanied by a jump in the vector spin chirality order parameter of the system. This shows that tuning long-range interactions allows control of the onset of sizable vector spin chirality in a system, which may be used to transmit information down the chain. We investigate the characteristic structure of the distinct phases and explore their possible physical implementation in different materials systems.
description: 5 pages, 5 Figures
Singlet Free Energies of a Static Quark-Antiquark Pair
Creators: name: Petrov, Konstantin
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We study the singlet part of the free energy of a static quark anti-quark pair at finite temperature in three flavor QCD with degenerate quark masses using $N_τ=4$ and 6 lattices with Asqtad staggered fermion action. We look at thermodynamics of the system around phase transition and study its scaling with lattice spacing and quark masses.
description: Talk given at Strong and Electroweak Matter 04 conference, Helsinki, Finland
Improvement on cost-performance ratio of fiberglass/carbon fiber hybrid composite
Creators: name: Nathawat Poopakdee
Publisher: name: Metallurgy and Materials Science Research Institute Chulalongkorn University
Year: 2021
Subjects: Cost-performance
Hybrid Composite
Fiberglass
Carbon Fiber
FiberTensile Properties

description: Journal of Metals, Materials and Minerals, 31, 1, 35-43
Testing Dissipative Collapse Models with a Levitated Micromagnet
Creators: name: Vinante, A.
name: Gasbarri, G.
name: Timberlake, C.
name: Toroš, M.
name: Ulbricht, H.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present experimental tests of dissipative extensions of spontaneous wave function collapse models based on a levitated micromagnet with ultralow dissipation. The spherical micromagnet, with radius $R=27$ $μ$m, is levitated by Meissner effect in a lead trap at $4.2$ K and its motion is detected by a SQUID. We perform accurate ringdown measurements on the vertical translational mode with frequency $57$ Hz, and infer the residual damping at vanishing pressure $γ/2π<9$ $μ$Hz. From this upper limit we derive improved bounds on the dissipative versions of the CSL (continuous spontaneous localization) and the DP (Diósi-Penrose) models with proper choices of the reference mass. In particular, dissipative models give rise to an intrinsic damping of an isolated system with the effect parameterized by a temperature constant; the dissipative CSL model with temperatures below 1 nK is ruled out, while the dissipative DP model is excluded for temperatures below $10^{-13}$ K. Furthermore, we present the first bounds on dissipative effects in a more recent model, which relates the wave function collapse to fluctuations of a generalized complex-valued spacetime metric.
description: 10 pages, 7 figures
A LAKOSSÁG VISZONYULÁSA TELEPÜLÉSÉHEZ A GYÖNGYÖSI KISTÉRSÉGBEN
Creators: name: Szűcs, Antónia
name: Szűcs, Antónia
Publisher: name: Unknown
Year: 2012
Subjects: subject: Community/Rural/Urban Development
subject: életminőség
subject: Gyöngyösi kistérség
subject: stratégiai fejlesztés
subject: egyenlőtlenség
subject: beruházások
subject: the quality of life
subject: micro region of Gyöngyös
subject: strategic development
subject: disparity
subject: investments

description: Egy település népességének életminőségét nagymértékben befolyásolja, hogy milyen életkörülményeket tudnak számukra biztosítani. 2012 első felében kérdőíves felmérést készítettem a Gyöngyösi kistérség négy településén (Gyöngyösoroszi, Gyöngyöspata, Gyöngyöstarján és Nagyréde). Jelen tanulmány célja, hogy a vizsgált településeken élők véleményeinek, tapasztalatainak összegyűjtése és elemzése révén képet kapjak a jelenlegi helyzetről, az aktuális problémákról. A település jellemzőire irányuló elégedettségi skála eredményei szerint a válaszadók többsége közepesen elégedett lakóhelyével. A faktorsúlyok alapján a szociális biztonságot szolgáló fejlesztéseket tartják legfontosabbnak a megkérdezettek. Az eredmények ismeretében válhatnak láthatóvá azok a lakossági igények és elvárások, melyekre hangsúlyt kell helyezni a térség stratégiai fejlesztési irányainak meghatározásakor. --------------------------------------------------------- The quality of life of a municipality’s population is highly influenced by what living conditions they can provide the inhabitants. In the first half of 2012 a questionnaire survey was made in four settlements of the micro region of Gyöngyös (Gyöngyösoroszi, Gyöngyöspata, Gyöngyöstarján and Nagyréde). The aim of this study is to get a clear picture of the current situation and problems of the inhabitants on the surveyed municipalities by collecting and analyzing their opinions and experience. The results of the satisfaction scale aiming at town features shows that the majority of respondents are satisfied with their abode. According to the factors the social security is the most important developments from the point of view of respondents. In view of these results the needs and expectations of inhabitants become visible which must be emphasized during the determination of the directions of strategic.
Additional file 1 of Dapagliflozin effect on endothelial dysfunction in diabetic patients with atherosclerotic disease: a randomized active-controlled trial
Creators: name: Sposito, Andrei C.
name: Ikaro Breder
name: Soares, Alexandre A. S.
name: Kimura-Medorima, Sheila T.
name: Munhoz, Daniel B.
name: Riobaldo M. R. Cintra
name: Bonilha, Isabella
name: Oliveira, Daniela C.
name: Breder, Jessica Cunha
name: Cavalcante, Pamela
name: Moreira, Camila
name: Moura, Filipe A.
name: Lima-Junior, Jose Carlos De
name: Helison R. P. Do Carmo
name: Barreto, Joaquim
name: Nadruz, Wilson
name: Luiz Sergio F. Carvalho
name: Thiago Quinaglia
Publisher: name: figshare
Year: 2021
Subjects: subject: Biochemistry
subject: Space Science
subject: Medicine
subject: Cell Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Immunology
subject: FOS: Clinical medicine

description: Additional file 1. Supplemental material provides detailed information on the methods and exploratory analyses presented in the study.
Counter example to a quantum inequality
Creators: name: Krasnikov, S.
Publisher: name: arXiv
Year: 2004
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A `quantum inequality' (a conjectured relation between the energy density of a free quantum field and the time during which this density is observed) has recently been used to rule out some of the macroscopic wormholes and warp drives. I discuss the possibility of generalizing that result to other similar spacetimes and first show that the problem amounts to verification of a slightly different inequality. This new inequality \emph{can} replace the original one, if an additional assumption (concerning homogeneity of the `exotic matter' distribution) is made, and \emph{must} replace it if the assumption is relaxed. Then by an explicit example I show that the `new' inequality breaks down even in a simplest case (a free field in a simply connected two dimensional space). Which suggests that there is no grounds today to consider such spacetimes `unphysical'.
description: Sec. II is completely rewritten: the gulf is discussed between the proven QIs and those used in ruling out exotic spacetimes
Anisotropy in Antiferromagnets
Creators: name: O'Grady, K
name: Sinclair, J
name: Elphick, K
name: Carpenter, R
name: Vallejo-Fernandez, G
name: Probert, M I J
name: Hirohata, A
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Due to the advent of antiferromagnetic (AF) spintronics there is a burgeoning interest in AF materials for a wide range of potential and actual applications. Generally, AFs are characterized via the ordering at the Neel temperature (TN) but, to have a stable AF configuration, it is necessary that the material have a sufficient level of anisotropy so as to maintain the orientation of the given magnetic state fixed in one direction. Unlike the case for ferromagnets there is little established data on the anisotropy of AFs and in particular its origins and those factors which control it. In this paper these factors are reviewed in the light of recent and established experimental data. Additionally, there is no recognized technique for the first principle determination of the anisotropy of an AF which can only be found indirectly via the exchange bias phenomenon. This technique is reviewed and in particular the implications for the nature of the anisotropy that is measured and its distribution. Finally, a strategy is proposed that would allow for the development of AF materials with controlled anisotropy for future applications.
description: 20 pages, 11 figures, invited paper
Multidimensional hierarchical tests of general relativity with gravitational waves
Creators: name: Zhong, Haowen
name: Isi, Maximiliano
name: Chatziioannou, Katerina
name: Farr, Will M.
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Tests of general relativity with gravitational waves typically introduce parameters for putative deviations and combine information from multiple events by characterizing the population distribution of these parameters through a hierarchical model. Although many tests include multiple such parameters, hierarchical tests have so far been unable to accommodate this multidimensionality, instead restricting to separate one-dimensional analyses and discarding information about parameter correlations. In this paper, we extend population tests of general relativity to handle an arbitrary number of dimensions. We demonstrate this framework on the two-dimensional inspiral-merger-ringdown consistency test, and derive new constraints from the latest LIGO-Virgo-KAGRA catalog, GWTC-3. We obtain joint constraints for the two parameters introduced by the classic formulation of this test, revealing their correlation structure both at the individual-event and population levels. We additionally propose a new four-dimensional formulation of the inspiral-merger-ringdown test that we show contains further information. As in past work, we find the GW190814 event to be an outlier; the 4D analysis yields further insights on how the low mass and spin of this event biases the population results. Without (with) this event, we find consistency with general relativity at the 60\% (92\%) credible level in the 2D formulation, and 76\% (80\%) for the 4D formulation. This multi-dimensional framework can be immediately applied to other tests of general relativity in any number of dimensions, including the parametrized post-Einsteinian tests and ringdown tests.
description: 18 pages, 11 figures
Surface Brightness and Stellar Populations at the Outer Edge of the Large Magellanic Cloud: No Stellar Halo Yet
Creators: name: Gallart, C.
name: Stetson, P. B.
name: Hardy, E.
name: Pont, F.
name: Zinn, R.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a high quality CMD for a 36'x 36' field located 8 degrees (7 kpc) from the LMC center, as well as a precise determination of the LMC surface brightness derived from the resolved stellar population out to this large galactocentric radius. This deep CMD shows for the first time the detailed age distribution at this position, where the surface brightness is V=26.5 mag/sq". At a radius R=474' the main sequence is well populated from the oldest turnoff at I=21.5 to the 2.5 Gyr turnoff at I=19.5. Beyond this radius, a relatively strong gradient in the density of stars with ages in the 2.5-4 Gyr range is apparent. There are some stars brighter and bluer than the main population, quite uniformly distributed over the whole area surveyed, which are well matched by a 1.5 Gyr isochrone and may be indicative of a relatively recent star formation, or merger, event. The surface brightness profile of the LMC remains exponential to this large galactocentric radius and shows no evidence of disk truncation. Combining the information on surface brightness and stellar population we conclude that the LMC disk extends (and dominates over a possible stellar halo) out to a distance of at least 7 kpc. These results confirm that the absence of blue stars in the relatively shallow off-center CMDs of dIrr galaxies is not necessarily evidence for an exclusively old stellar population resembling the halo of the Milky Way.
description: ApJLett, in press 13 pages including 3 color figures
FADIAGRAMOK ALKALMAZÁSA A VALÓSZÍNŰSÉG-SZÁMÍTÁS TANÍTÁSA SORÁN
Creators: name: Debrenti, Edith
name: Debrenti, Edith
Publisher: name: Unknown
Year: 2013
Subjects: subject: Teaching/Communication/Extension/Profession
subject: valószínűségszámítás
subject: matematikaoktatás
subject: reprezentációk
subject: fadiagramok
subject: döntési fák
subject: probability theory
subject: teaching of the mathematics
subject: representations
subject: tree diagrams
subject: decision trees

description: A világról szerzett információink nagy részét a szemünk segítségével fogadjuk be, a vizualításnak nagy szerepe van az életünkben. Így a tárgyi és képi reprezentációknak fontos szerepe van a tanulási folyamatban, a szemléletes oktatás segít a fogalmak mélyebb megértésében, ezt számos pszichológiai kutatás is bizonyítja. Az emberek jobban emlékeznek egy fogalom vizuális aspektuaira, mint az analitikus szempontokra. A nemzetközi matematikadidaktikai szakirodalomban erősödik az a felfogás, hogy a vizuális reprezentációkat a felsőfokú oktatásban is alkalmazni kell, ezzel is segítve a megértést. A klasszikus valószínűség-számítás tanítása során jól használhatók a fadiagramok, melyek főleg többlépcsős kísérleteknél, sokkal áttekinthetőbbek, jól észrevehető, látható rajtuk az összes kimenetel. Egy gyökértől kiindulva különböző utakat rajzolunk az egymást kizáró eredményekkel, amelyek a kísérlet első lépcsőjében fellépnek, és ellátjuk a megfelelő valószínűségekkel. Onnan a további lépcsők következnek. Jól szemléltethető fadiagrammal a teljes valószínűség tétele és a Bayes-tétel is. Az előadásban a valószínűség-számítás tanítása során észlelt tapasztalataimról is szó esik. ----------------------------------------------------------- We collect the most part of the information from the world around us with the help of our eyes. Our visual ability plays an important role in man’s life. Thus the visual and symbolic representations are of great help in learning. The use of visual aids in the process of teaching leads to a better understanding of the concepts. The same fact has been proved by many psychological experiments, too. In teaching the probability theory we can use with great success the three diagrams which, mainly in the case of multilevel experiments, can give us a much clearer view of the problem, they are easy to look over or grasp their view and can show us an overall representation of the case. Starting from the same root, we can draw different ramifications which can be marked with their appropriate value of probability. Hence the next stages continue. The total probability’s theorem and Bayes’ theorem can be clearly represented on a tree diagram. In my lecture I shall also deal with the experiences I had in teaching the probability theory.
KOMPLETTEN POZITÍV LEKÉPEZÉSEK ÉS R. V. KADISON EGY SEJTÉSE
Creators: name: Kovács, István Béla
name: Kovács, István Béla
Publisher: name: Unknown
Year: 2013
Subjects: subject: Research Methods/ Statistical Methods
subject: Teaching/Communication/Extension/Profession
subject: C*-algebra
subject: kompletten pozitív operátor
subject: deriváció
subject: completely positive operator
subject: derivation

description: Múlt évben az operátor tér és a kompletten korlátos leképezés fogalmát jártuk körül, azaz azt vizsgáltuk, hogyan adható meg alkalmas norma sorozat egy lineáris tér vektoraiból alkotott négyzetes mátrixokon. Ez évben egy C*-algebra elemeiből alkotott mátrixok kvantálásával foglalkozunk. Ha A egy C*-algebra és M (A) az olyan n x n-es mátrixok tere, amelyek elemei A-ból valók, akkor M (A) is természetes módon C*-algebra, pozitív elemekkel. Definiáljuk C*-algebrák kompletten pozitív leképezéseit és bemutatunk néhány példát. Megvizsgáljuk a pozitivitás, kompletten pozitív tulajdonság, valamint a komplett korlátosság viszonyát, majd bemutatunk néhány a kompletten pozitív leképezésekre vonatkozó tételt. Végül néhány, az operátor tér struktúrából származó többlet információt kihasználó tétel segítségével két ekvivalens megfogalmazását ismertetjük Kadison egyik, a C*-algebrák algebra homomorfizmusaira vonatkozó sejtésének. --------------------------------------------------------------- Last year we have introduced operator spaces and completely bounded maps, that is we investigated how can a sequence of norms be defined on matrices constructed from the vectors of a linear space. This year we quantize matrices with entries from a C*-algebra. If A is a C*-algebra then M (A) is again a C*-algebra in a natural way, with positive elements. We define the completely positive maps of C*-algebras and list some examples. We inspect the relationship between complete positivity and complete boundedness and quote further theorems on completelypositive maps. Finally, with the help of some theorems using the extra information encoded in the operator space structure we show two equivalent forms of Kadison’s conjecture on bounded algebra homomorphisms of C*-algebras.
AZ INTEGRÁLSZÁMÍTÁS OKTATÁSÁRÓL
Creators: name: Körtesi, Péter
name: Körtesi, Péter
Publisher: name: Unknown
Year: 2013
Subjects: subject: Teaching/Communication/Extension/Profession
subject: integrálszámítás
subject: integrál összegek
subject: oktatás
subject: integral calculus
subject: integral sum
subject: teaching

description: A határozott integrál értelmezése során különböző integrál-összegekkel találkozhatunk. Nyilvánvaló, hogy a határozott integrál pontosan akkor létezik, ha ezek az integrál-összegek konvergensek. Ez azt is jelenti, hogy ha egy határozott integrál létezik, mert pl. van primitív függvénye az adott intervallumon, vagy az intervallumon folytonos függvény integrálját tekintjük, akkor ez a határozott integrál egyben mindenfajta, sajátos formában felírt integrál-összegnek a határértéke is. -------------------------------------------------------- While introducing the notion of definite integral one use different integral sums. By definition the definit integral exists exactly when the given sums converge. Once the definite integral exists (e.g. the given function has pimitive or it is continous on that interval) it will be the limit of all sums, even special form integral sums as well.
Collins Effect in Single Spin Asymmetries of the $p^{\uparrow}p \to πX$ Process
Creators: name: Ma, Bo-Qiang
name: Schmidt, Ivan
name: Yang, Jian-Jun
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We investigate the Collins effect in single spin asymmetries (SSAs) of the $p^{\uparrow}p \to πX$ process, by taking into account the transverse momentum dependence of the microscopic sub-processes cross sections, with the transverse momentum in the Collins function integrated over. We find that the asymmetries due to the Collins effect can only explain the available data at best qualitatively, by using our choices of quark distributions in the quark-diquark model and a pQCD-based analysis, together with several options of the Collins function. Our results indicate the necessity to take into account contributions from other effects such as the Sivers effect or twist-3 contributions.
description: 10 LaTeX pages, 2 figures. Version in journal publication
Probabilistic heuristics for disseminating information in networks
Creators: name: Stauffer, A. O.
name: Barbosa, V. C.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences
subject: C.2.2; F.2.2

description: We study the problem of disseminating a piece of information through all the nodes of a network, given that it is known originally only to a single node. In the absence of any structural knowledge on the network other than the nodes' neighborhoods, this problem is traditionally solved by flooding all the network's edges. We analyze a recently introduced probabilistic algorithm for flooding and give an alternative probabilistic heuristic that can lead to some cost-effective improvements, like better trade-offs between the message and time complexities involved. We analyze the two algorithms both mathematically and by means of simulations, always within a random-graph framework and considering relevant node-degree distributions.
Obtaining a class of Type N pure radiation metrics using invariant operators
Creators: name: Ramos, M. P. Machado
name: Edgar, S. Brian
Publisher: name: arXiv
Year: 2004
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We develop further the integration procedure in the generalised invariant formalism, and demonstrate its efficiency by obtaining a class of Petrov type N pure radiation metrics without any explicit integration, and with comparatively little detailed calculations. The method is similar to the one exploited by Edgar and Vickers when deriving the general conformally flat pure radiation metric. A major addition to the technique is the introduction of non-intrinsic elements in generalised invariant formalism, which can be exploited to keep calculations manageable.
description: This work was presented in July 2004, in the Gr17 meeting held in Dublin-Ireland
Can Sub-photospheric Magnetic Reconnection Change the Elemental Composition in the Solar Corona?
Creators: name: Baker, Deborah
name: van Driel-Gesztelyi, Lidia
name: Brooks, David H.
name: Demoulin, Pascal
name: Valori, Gherardo
name: Long, David M.
name: Laming, J. Martin
name: To, Andy S. H.
name: James, Alexander W.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Within the coronae of stars, abundances of those elements with low first ionization potential (FIP) often differ from their photospheric values. The coronae of the Sun and solar-type stars mostly show enhancements of low- FIP elements (the FIP effect) while more active stars such as M-dwarfs have coronae generally characterized by the inverse-FIP effect (I-FIP). Here we observe patches of I-FIP effect solar plasma in AR 12673, a highly complex beta/gamma/delta active region. We argue that the umbrae of coalescing sunspots and more specifically strong light bridges within the umbrae, are preferential locations for observing I-FIP effect plasma. Furthermore, the magnetic complexity of the active region and major episodes of fast flux emergence also lead to repetitive and intense flares. The induced evaporation of the chromospheric plasma in flare ribbons crossing umbrae enables the observation of four localized patches of I-FIP effect plasma in the corona of AR 12673. These observations can be interpreted in the context of the ponderomotive force fractionation model which predicts that plasma with I-FIP effect composition is created by the refraction of waves coming from below the chromosphere. We propose that the waves generating the I-FIP effect plasma in solar active regions are generated by sub-photospheric reconnection of coalescing flux systems. Although we only glimpse signatures of I-FIP effect fractionation produced by this interaction in patches on the Sun, on highly active M-stars it may be the dominant process.
title: Potential and costs of geothermal energy with particular interest on district heating
Creators: name: Danese, Carlo
Publisher: name: TU Wien
Year: 2016
Subjects: subject: Geothermie
subject: Potentiale
subject: Kosten
subject: Stromerzeugung
subject: Wärmeversorgung
subject: Europa
subject: Geothermal Energy
subject: Potentials
subject: Costs
subject: Electricity supply
subject: Heat supply
subject: Europe

description: The aim of this thesis is to provide a general overview of potential and costs of electricity and heat generation from geothermal energy in Europe, with particular interest on the potential of district heating. The approach taken includes a literature survey, expert interviews and detailed complementary bottom-up modeling to accomplish data lacks identified throughout the literature survey. This thesis provides a synthesis of different data and estimations from different specialized reports and researches concerning the potential for geothermal energy supply and use in Europe. Both district heating and electricity generation have been considered for a broad set of European countries, including the EU28 and focal countries outside the EU. For what concerns the estimation of the district heating potential from geothermal energy in Europe, the existent (i.d. viewed) literature considers only a portion of the European countries. The evaluation has been expanded to the whole continent throughout a graphic and analytic process based on a temperature map provided by the GeoELEC Project. The results and data have been compared in order to have a broader and more consistent view of the geothermal energy potential in Europe. The analysis of the costs of a district heating system powered by geothermal energy has been made with the help of specific case-studies made in different countries. The potential and the costs of the electricity generation from geothermal energy were, in the considered literature, already strictly related, and so they have been reported in this thesis. The results, especially for the heat generation potential, are astonishing: almost every European country possesses a geothermal energy potential already at 1000m depth. The potential increases with deeper depths and with them, in general, the costs sink. In fact, in comparison to a resource at 60°C located at 1km depth, one just 20° warmer located at 2km depth is more economically valuable. The total potential of the 30 analyzed territories accounts for 1428TWhth. The actual European heat generation from geothermal energy is around 14TWhth. Considering only the electricity generation, the amount of electricity potential producible with power plants powered by geothermal energy is above 4000TWhe. If we think that the electricity demand of the EU28 in 2050 will be around 4300TWhe (countries like Turkey and Iceland aren-t included in the calculation), it becomes clear how the geothermal energy could play a key role in the future energetic paradigm.
Warped CFT duals of the Plebański-Demiański family of solutions
Creators: name: Jiang, Xuhao
name: Xu, Jianfei
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper, we analyze the symmetry properties of the complete family of type D spacetimes generalized form the Plebański-Demiański solution in four dimensions holographically in terms of a warped CFT. The generalized Plebański-Demiański solutions are black hole-like spacetimes characterized by seven physical parameters. Most of the black holes in four dimensions are included within this family. Generically consider a solution with horizon in this family, we figure out the possible warped conformal symmetry attached to the horizon. The horizon can be either extremal or non-extremal. In the extremal case, the near horizon region can be mapped to an infinite spacetime with geometry given by a warped and twist product of AdS$_2$ and S$^2$. The new boundary conditions for AdS$_2$ as well as their higher dimensional uplifts are applied here to manifest the asymptotic symmetry as the warped conformal symmetry. In the non-extremal case, the global warped conformal symmetry is singled out by analyzing the scalar wave equation with constant frequency. The local warped conformal symmetries are represented by the charge algebra associated to the vector fields which preserve the scalar wave equation as well as its frequency. In defining the variation of the covariant charges, a proper counterterm is introduced for consistency conditions which is supposed to be suitable for all the solutions within the family. As a consistency check, the horizon entropy is reproduced by the entropy formula of the warped CFT by using its modular covariance and the central terms derived in the bulk spacetimes.
description: 27 pages
Metodología para el diseño de Barreras Reactivas Permeables para la descontaminación de As y Hg en aguas subterráneas
Creators: name: Sierra, Antonio Luis Marques
Publisher: name: figshare
Year: 2020
Subjects: subject: 50207 Environmental Rehabilitation (excl. Bioremediation)
subject: FOS: Earth and related environmental sciences

description: Los emplazamientos mineros que cesaron su actividad con anterioridad a la promulgación de legislaciones ambientales más exigentes en materia de responsabilidad medioambiental, suponen en muchos casos un foco de contaminación para los ecosistemas. En Asturias la minería del mercurio supuso una importante y lucrativa industria hasta que en los años 70 en la que los cambios en el mercado y en la nueva normativa ambiental sobre el mercurio a nivel mundial abocaron al cierre a las
explotaciones asturianas.
En la actualidad de las explotaciones de mercurio presentes en Asturias en 1970 solo se ha actuado parcialmente sobre una de ellas situada en Mieres, pero el resto de ellas (Caunedo, Soterraña, Campa del Trave, etc.) siguen en un estado de abandono total y emitiendo lixiviados con contenidos en metales como el As o el Hg que suponen un
riesgo para la salud y el medioambiente.
Asturias es una región con un clima húmedo y lluvioso por los que las escombreras de residuos de la minería del mercurio (escorias, calcinados y estériles) actúan por una
parte como acuíferos libres y por otra como pilas de lixiviación generando lixiviados con altos niveles de Arsénico, dadas las peculiaridades de la mineralización (cinabrio con contenidos de rejalgar oropimente y arsenopirita, entre otras especies). Existen múltiples estudios sobre algunas de estas minas de mercurio y todos ellos remarcan el riesgo que suponen para la salud y el medio ambiente. El problema que existe es que
no existen vías de financiación actualmente disponibles para acometer los trabajos necesarios para la descontaminación de estas áreas. De todas las áreas que están incluidas en el catálogo de suelos contaminados de Asturias solo se ha procedido a la descontaminación del Grupo La Peña El Terronal en Mieres y se encuentra
presupuestado pero sin fecha de ejecución para la escombrera de La Soterraña. El resto de explotaciones no tienen visos de descontaminarse en un futuro cercano.
El problema radica en el elevado coste que supone para las arcas públicas acometer las acciones necesarias de descontaminación. Mientras tanto seguimos teniendo pilas de lixiviación que vierten sus lixiviados contaminantes al medio ambiente sin poder hacer nada para frenar esta situación.
La opción analizada en este estudio sería usar técnicas pasivas para evitar que esos lixiviados contaminantes afecten al medioambiente. Entre las tecnologías disponibles en la actualidad que mejor encajan en las necesidades descritas se encuentran las Barreras Reactivas Permeables (PRB por sus siglas en ingles).
A MÉRNÖKI FIZIKA ONLINE OKTATÁSA A DUNAÚJVÁROSI FŐISKOLÁN
Creators: name: Horvát, Miklós
name: Kiss, Endre
name: Kenyeres, Krisztina
name: Horvát, Miklós
name: Kiss, Endre
name: Kenyeres, Krisztina
Publisher: name: Unknown
Year: 2013
Subjects: subject: Teaching/Communication/Extension/Profession
subject: fizika tanítás
subject: online tananyag fejlesztés
subject: mérnöki fizika
subject: teaching of physics
subject: online developing of curriculum
subject: engineering phisics

description: A Dunaújvárosi Főiskolán egy elnyert pályázat keretein belül több tantárgyból nagyszabású tananyag fejlesztés indult 2012-ben. A projekt során Mérnöki fizikából olyan online tananyagot fejlesztünk, amely a lecsökkent kontakt óraszámot és bemutatandó kísérleteket rövid, lényegre törő, de jól megtervezett, érdekes videóra rögzített előadásokkal, filmre rögzített kísérletekkel, valamint számítógépes animációkkal pótolja. A tananyag fejlesztés célja az, hogy a csökkenő kontakt óraszám mellett egy jól használható, könnyű önálló tanulásra alkalmas segédletet adjon a hallgatók kezébe. A levelező képzés esetén a lehetséges minimumra csökkent óraszám miatt - nem lemondva a személyes konzultáció lehetőségéről - a kontakt órákat kell helyettesíteni ezzel a tananyaggal a lehető legnagyobb mértékben. Jelen cikkben a Mérnöki fizika tantárgy feldolgozásának koncepcióját, az online tananyag fejlesztés alapelveit és az eddig elkészült fejezeteit szeretnénk bemutatni. ----------------------------------------------------- In the College of Dunaújváros a large-scale curriculum development began in 2012 within a won tender, including several subjects. During the project the online teaching material of Engineering physics is developed. This new curriculum substitutes the missing contact lectures and demonstrations for brief and concise, but well-designed interesting video recorded lectures, short filmclips about experiments, and computer animations. The main goal of the curriculum development, to deliver for the students a well-usable, suitable for easy self-study teaching material, under the conditions of decreasing number of contact lectures. In case of correspondence cours, because of the minimalized number of contact lectures- not renouncing the possibility of a personal consultation -the contact hours should be replaced by this teaching material as much as possible. This paper discusses the concept of the processing of Engineering physics course, the principles of development of the online curriculum, and we would like to introduce the completed chapters of the curriculum.
Y2 Isochrones with an Improved Core Overshoot
Creators: name: Demarque, Pierre
name: Woo, Jong-Hak
name: Kim, Yong-Cheol
name: Yi, Sukyoung
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Convective core overshoot affects stellar evolution rates and the dating of stellar populations. In this paper, we provide a patch to the $Y^2$ isochrones with an improved treatment of convective core overshoot. The new tracks cover the transition mass range from no convective core to a fully developed convective core. We compare the improved isochrones to CMDs of a few well observed open star clusters in the Galaxy and the Large Magellanic Cloud. Finally we discuss future prospects for improving the treatment of core overshoot with the help of asteroseismology.
description: Accepted for publication in ApJS (December issue)
Robust trajectory generation for robotic control on the neuromorphic research chip Loihi
Creators: name: Michaelis, Carlo
name: Lehr, Andrew B.
name: Tetzlaff, Christian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Neuromorphic hardware has several promising advantages compared to von Neumann architectures and is highly interesting for robot control. However, despite the high speed and energy efficiency of neuromorphic computing, algorithms utilizing this hardware in control scenarios are still rare. One problem is the transition from fast spiking activity on the hardware, which acts on a timescale of a few milliseconds, to a control-relevant timescale on the order of hundreds of milliseconds. Another problem is the execution of complex trajectories, which requires spiking activity to contain sufficient variability, while at the same time, for reliable performance, network dynamics must be adequately robust against noise. In this study we exploit a recently developed biologically-inspired spiking neural network model, the so-called anisotropic network. We identified and transferred the core principles of the anisotropic network to neuromorphic hardware using Intel's neuromorphic research chip Loihi and validated the system on trajectories from a motor-control task performed by a robot arm. We developed a network architecture including the anisotropic network and a pooling layer which allows fast spike read-out from the chip and performs an inherent regularization. With this, we show that the anisotropic network on Loihi reliably encodes sequential patterns of neural activity, each representing a robotic action, and that the patterns allow the generation of multidimensional trajectories on control-relevant timescales. Taken together, our study presents a new algorithm that allows the generation of complex robotic movements as a building block for robotic control using state of the art neuromorphic hardware.