cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Sub-Terahertz Wireless Coverage Analysis at 142 GHz in Urban Microcell
Creators: name: Xing, Yunchou
name: Kanhere, Ojas
name: Ju, Shihao
name: Rappaport, Theodore S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Small-cell cellular base stations are going to be used for mmWave and sub-THz communication systems to provide multi-Gbps data rates and reliable coverage to mobile users. This paper analyzes the base station coverage of sub-THz communication systems and the system performance in terms of spectral efficiency through Monte Carlo simulations for both single-cell and multi-cell cases. The simulations are based on realistic channel models derived from outdoor field measurements at 142 GHz in urban microcell (UMi) environments conducted in downtown Brooklyn, New York. The single-cell base station can provide a downlink coverage area with a radius of 200 m and the 7-cell system can provide a downlink coverage area with a radius of 400 m at 142 GHz. Using a 1 GHz downlink bandwidth and 100 MHz uplink bandwidth, the 7-cell system can provide about 4.5 Gbps downlink average data rate and 410 Mbps uplink average data rate at 142 GHz.
description: 6 pages, 7 figures, 1 table, IEEE ICC 2022
Extended Bose Hubbard model of interacting bosonic atoms in optical lattices: from superfluidity to density waves
Creators: name: Mazzarella, G.
name: Giampaolo, S. M.
name: Illuminati, F.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: For systems of interacting, ultracold spin-zero neutral bosonic atoms, harmonically trapped and subject to an optical lattice potential, we derive an Extended Bose Hubbard (EBH) model by developing a systematic expansion for the Hamiltonian of the system in powers of the lattice parameters and of a scale parameter, the {\it lattice attenuation factor}. We identify the dominant terms that need to be retained in realistic experimental conditions, up to nearest-neighbor interactions and nearest-neighbor hoppings conditioned by the on site occupation numbers. In mean field approximation, we determine the free energy of the system and study the phase diagram both at zero and at finite temperature. At variance with the standard on site Bose Hubbard model, the zero temperature phase diagram of the EBH model possesses a dual structure in the Mott insulating regime. Namely, for specific ranges of the lattice parameters, a density wave phase characterizes the system at integer fillings, with domains of alternating mean occupation numbers that are the atomic counterparts of the domains of staggered magnetizations in an antiferromagnetic phase. We show as well that in the EBH model, a zero-temperature quantum phase transition to pair superfluidity is in principle possible, but completely suppressed at lowest order in the lattice attenuation factor. Finally, we determine the possible occurrence of the different phases as a function of the experimentally controllable lattice parameters.
description: 18 pages, 7 figures, accepted for publication in Phys. Rev. A
Fireballs from Quark Stars in the CFL Phase: Application to Gamma Ray Bursters
Creators: name: Ouyed, R.
name: Rapp, R.
name: Vogt, C.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Recent studies of photon-generation mechanisms in the color-superconducting Color-Flavor Locked (CFL) phase of dense quark matter have found gamma-ray emissivities in excess of ~ 10^{50} erg cm^{-3} s^{-1} for temperatures in the 10-30 MeV range. We suggest that this property can trigger gamma-ray bursts (GRBs) and associated fireballs at the surface of hypothetical hot (newly born) quark stars with an energy release of up to 10^{48}-10^{50} erg within a fraction of a millisecond. If surrounded by an accretion disk following its formation, the star's bursting activity can last from tens of milliseconds to hundreds of seconds releasing up to 10^{52} erg in total energy. We discuss typical features of observed GRBs within our model and explain how quark stars in the CFL phase might constitute natural candidates for corresponding inner engines.
description: 8 journal pages, 6 figures. Accepted for publication in the Astrophysical Journal
A Study of customer satisfaction in Social Learning Center in Malaysia
Creators: name: Ali, Muhammad Najib
Publisher: name: figshare
Year: 2020
Subjects: subject: Sociology
subject: FOS: Sociology
subject: 160512 Social Policy
subject: FOS: Political science

description: This study will identify main theme contribute to customer satisfaction in social learning centre from u3e centre, PAWE, private and NGOs day care. In quantitative study, 250 operators targeted as sample size of population. A minimum of 150 sample size were involved in this study within PAWE, u3e, private daycare centre or pondok day care activities. 
Modeling Hall viscosity in magnetic-skyrmion systems
Creators: name: Kim, Bom Soo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Magnetic skyrmions are topologically stable objects that are made with a bunch of spins tightly arranged in a smooth fashion. Their topological nature provides unusual and complex transport properties, such as the skyrmion Hall effect. Extensive Hall data have further revealed asymmetry between skyrmion and antiskyrmion Hall angles, which cannot be accounted by known mechanisms. Here, we explain this asymmetry by utilizing another universal transport coefficient called `Hall viscosity,' extensively studied in quantum Hall systems. Hall viscosity is modeled in steady-state skyrmions motion by generalizing the Thiele equation with a transverse velocity component and is independent of the skyrmion charge. Our analyses, based on available asymmetric Hall angle data, reveal this transverse force amounts 3\% - 5.4\% of the force due to the skyrmion Hall effect. Further clarification of Hall viscosity will be essential for designing next generation storage devices properly, not to mention for our deeper understanding of fundamental properties of nature.
description: 5 pages, 2 figures. A short presentation can be found in APS March Meeting page, https://absuploads.aps.org/presentation.cfm?pid=16434
On the Color-Metallicity Relation of the Red Clump and the Reddening Toward the Magellanic Clouds
Creators: name: Nataf, David M.
name: Cassisi, Santi
name: Casagrande, Luca
name: Yuan, Wenlong
name: Riess, Adam G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The zero point of the reddening toward the Large Magellanic Cloud (LMC) has been the subject of some dispute. Its uncertainty propagates as a systematic error for methods which measure the extragalactic distance scale through knowledge of the absolute extinction of LMC stars. In an effort to resolve this issue, we used three different methods to calibrate the most widely-used metric to predict LMC extinction, the intrinsic color of the red clump, $(V-I)_{RC,0}$, for the inner $\sim$3 degrees of that galaxy. The first approach was to empirically calibrate the color zeropoints of the BaSTI isochrones over a wide metallicity range of $Δ\rm{[Fe/H]} \approx 1.10$ using measurements of red clump stars in 47 Tuc, the Solar Neighborhood, and NGC 6791. From these efforts we also measure these properties of the Solar Neighborhood red clump, ($V-I$, $G_{BP}-K_{s}$, $G-K_{s}$, $G_{RP}-K_{s}$, $J-K_{s}$, $H-K_{s}$, $M_{I}$, $M_{Ks}$)$_{RC,0} =$ (1.02, 2.75, 2.18, 1.52, 0.64, 0.15, $-$0.23, $-$1.63). The second and third methods were to compare the observed colors of the red clump to those of Cepheids and RR Lyrae in the LMC. With these three methods, we estimated the intrinsic color of the red clump of the LMC to be $(V-I)_{RC,0,\rm{LMC}} = \{ \approx 0.93,0.91 \pm 0.02,0.89 \pm 0.02\}$ respectively, and similarly using the first and third method we estimated $ (V-I)_{RC,0,\rm{SMC}} = \{\approx 0.85,0.84 \pm 0.02 \}$ respectively for the Small Magellanic Cloud. We estimate the luminosities to be $M_{I,RC,\rm{LMC}}=-0.26$ and $M_{I,RC,\rm{SMC}}=-0.37$. We show that this has important implications for recent calibrations of the tip of the red giant branch in the Magellanic Clouds used to measure $H_0$.
description: 20 pages, 5 figures, 4 tables. Accepted for Publication in The Astrophysical Journal as of February 9th, 2021
Lifetime of dynamic heterogeneities in a binary Lennard-Jones mixture
Creators: name: Flenner, Elijah
name: Szamel, Grzegorz
Publisher: name: arXiv
Year: 2004
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: A four-time correlation function was calculated using a computer simulation of a binary Lennard-Jones mixture. The information content of the four-time correlation function is similar to that of four-time correlation functions measured in NMR experiments. The correlation function selects a sub-ensemble and analyzes its dynamics after some waiting time. The lifetime of the sub-ensemble selected by the four-time correlation function is calculated, and compared to the lifetimes of slow sub-ensembles selected using two different definitions of mobility, and to the $α$ relaxation time.
description: accepted for publication in Phys. Rev. E
Lower bounds for open charm and beauty contributions to F_2
Creators: name: Kisselev, A. V.
name: Petrov, V. A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: On the basis of some peculiar scaling properties of the OPE coefficient functions, we give the lower bounds for F_2^{c\bar{c}} and F_2^{b\bar{b}} independently of the properties of the gluon density function. Predictions for F_2^{b\bar{b}} within reach of HERA are made.
description: 10 pages, 4 eps figures. Misprints are corrected and comment is added. To appear in JHEP
Violation of Remaining Lorentz Symmetry in the Approach of Time-Ordered Perturbation Theory to Space-Time Noncommutativity
Creators: name: Reichenbach, Tobias
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study remaining Lorentz symmetry, i.e. Lorentz transformations which leave the noncommutativity parameter $θ^{μν}$ invariant, within the approach of time-ordered perturbation theory (TOPT) to space-time noncommutative theories. Their violation is shown in a simple scattering process. We argue that this results from the non-covariant transformation properties of the phase factors appearing in TOPT.
description: 8 pages, 1 figure
A scaling improved inner-outer decomposition of near-wall turbulent motions
Creators: name: Wang, Limin
name: Hu, Ruifeng
name: Zheng, Xiaojing
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Near-wall turbulent velocities in turbulent channel flows are decomposed into small-scale and large-scale components at $y^+<100$ by improving the predictive inner-outer model of Baars et al. [Phys. Rev. Fluids 1, 054406 (2016)], where $y^+$ is the viscous-normalized wall-normal height. The small-scale one is obtained by reducing the outer reference height (a parameter in the model) from the center of the logarithmic layer to $y^+=100$, which can fully remove outer influences. On the other hand, the large-scale one represents the near-wall footprints of outer energy-containing motions. We present plenty of evidences that demonstrate that the small-scale motions are Reynolds-number invariant with the viscous scaling, at friction Reynolds numbers between 1000 and 5200. At lower Reynolds numbers from 180 to 600, the small scales can not be scaled by the viscous units, and the vortical structures are progressively strengthened as Reynolds number increases, which is proposed as a possible mechanism responsible for the anomalous scaling behavior. Finally, it is found that a small-scale part of the outer large-scale footprint can be well scaled by the viscous units.
Geometric Effect of High-Resolution Electron Energy Loss Spectroscopy on the Identification of Plasmons: An Example of Graphene
Creators: name: Li, Jiade
name: Lin, Zijian
name: Miao, Guangyao
name: Zhong, Weiliang
name: Xue, Siwei
name: Li, Yi
name: Tao, Zhiyu
name: Wang, Weihua
name: Guo, Jiandong
name: Zhu, Xuetao
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: High-resolution electron energy loss spectroscopy (HREELS) is one of the most powerful methods to detect the dispersion of plasmons. However, we find that in the HREELS measurement, the scattering geometric configuration will seriously affect the identification of plasmons. Here, taking graphene as an example, using the HREELS capable of two-dimensional energy-momentum mapping combined with the intensity distribution calculations, we visually display the intensity distribution of the scattering geometric factor. We demonstrate that the energy loss peaks from the scattering geometric effect may be misinterpreted as the features of an acoustic plasmon. In any HREELS measurement, it is necessary to evaluate the effect of the scattering geometry quantitatively to identify the intrinsic surface excitations.
description: 5 figures
Artificial scaling laws of the dynamical magnetic susceptibility in heavy-fermion systems
Creators: name: Knafo, W.
name: Raymond, S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report here how artificial, thus erroneous, scaling laws of the dynamical magnetic susceptibility can be obtained when data are not treated carefully. We consider the example of the heavy-fermion system Ce$_{0.925}$La$_{0.075}$Ru$_{2}$Si$_{2}$ and we explain how different kinds of artificial scaling laws in $E/T^β$ can be plotted in a low temperature regime where the dynamical susceptibility is nearly temperature independent.
description: 4 pages, 4 figures
Be/X-ray binaries: An observational approach
Creators: name: Negueruela, Ignacio
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Be/X-ray binaries are the most numerous class of X-ray binaries. They constitute an excellent tracer of star formation and can be used to study several aspects of astrophysics, from mass loss in massive stars to binary evolution. This short review, intended for the non-specialist, presents a summary of their basic observational properties and outlines the physical mechanisms giving rise to these characteristics.
description: 8 pages, 1 figure. Uses ASP Conference macro (included). Extended (mainly by expansion of the bibliography) version of short review appearing in Proceedings of "Massive Stars in Interacting Binaries" (Lac Sacacomie, Quebec, 16-20 Aug 2004) eds. N. St-Louis & A. Moffat, ASP Conf. Series
A STUDY OF CUSTOMER SATISFACTION IN SOCIAL LEARNING CENTER IN MALAYSIA
Creators: name: Ali, Muhammad Najib
Publisher: name: figshare
Year: 2020
Subjects: subject: Sociology
subject: FOS: Sociology
subject: 160512 Social Policy
subject: FOS: Political science

description: This study will identify main theme contribute to customer satisfaction in social learning centre from u3e centre, PAWE, private and NGOs day care. In quantitative study, 250 operators targeted as sample size of population. A minimum of 150 sample size were involved in this study within PAWE, u3e, private daycare centre or pondok day care activities. 
A study of customer satisfaction in Social Learning Center in Malaysia
Creators: name: Ali, Muhammad Najib
Publisher: name: figshare
Year: 2020
Subjects: subject: Sociology
subject: FOS: Sociology
subject: 160512 Social Policy
subject: FOS: Political science

description: This study will identify main theme contribute to customer satisfaction in social learning centre from u3e centre, PAWE, private and NGOs day care. In quantitative study, 250 operators targeted as sample size of population. A minimum of 150 sample size were involved in this study within PAWE, u3e, private daycare centre or pondok day care activities. 
Remex Monniot C. 1983
Creators: name: Kim, Il-Hoi
name: Boxshall, Geoff A.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Copepoda
Cyclopoida
Notodelphyidae
Remex

description: Genus Remex Monniot C., 1983
Diagnosis. Body of female slightly depressed: consisting of cephalosome, short neck, expanded brood pouch and narrow urosome. Brood pouch formed by fused fourth and fifthpedigerous somites. Freeurosome 5-segmented but with traces of articulations. Caudal rami whip-like. Rostrum shield-like. Antennule 7-segmented. Female antenna 3-segmented, comprising coxa, allobasis and unsegmented free endopod bearing terminal claw. Male antenna forming powerful chelate grasping organ. Mandible with coxal gnathobase forming broad cutting margin; basis separate; endopod 2-segmented, separate from basis; first and second endopodal segments with 3 and 7 setae, respectively; exopod 1-segmented, armed with 5 setae. Maxillule armedwith 8 setaeon arthrite, 1 on endite and 1 on epipodite, 3 on basis, 4 on exopod and 5 on endopod. Maxilla 3-segmented; basis with claw plus 2 setae; endopod small, 1-segmented with 4 setae plus spiniform process. Maxilliped 2-segmented, armedwith 5 setae on first segment and 3 setae on second. Legs 1–4 with 3-segmented exopods and 2-segmented endopods; inner coxal seta absent in all legs; basis of leg 1 with inner distal spine. Leg 4 lacking inner seta on first exopodal segment. Armature formula for legs 1–4 as follows.
Leg 5 comprising lateral papilla bearing protopodal seta and exopodal segment armed with 2 setae distally.
Type species. Remex obesus Monniot C., 1983, by original designation.
Remarks. When he established Remex, Monniot (1983) considered that it was related to Lonchidiopsis. These two genera appear to form a distinct group and may be distinguished from other related genera by shared features, such as: (1) antenna sexually dimorphic, cheliform in male; (2) basis and first endopodal segment of mandible fused; (3) endopod of maxillule armedwith 5 setae; (4) maxilla with strong claw on basis and atrophied endopod; (5) maxilliped bipartite, armedwith 3 setae on distal part (or segment); (6) legs 1–3 each with 2- segmented endopod; and (7) leg 5 rudimentary. Of these, three features, the sexually dimorphic antenna, the 5 setae on the maxillulary endopod, and the bipartite maxilliped with 3 distal setae, are unusual and serve to characterise the group. Remex is not confusable with Lonchidiopsis, however, because it has 3-segmented exopods in legs 1–3, and displays a peculiar form of the caudal rami and leg 4.
description: Published as part of Kim, Il-Hoi & Boxshall, Geoff A., 2020, Untold diversity: the astonishing species richness of the Notodelphyidae (Copepoda: Cyclopoida), a family of symbiotic copepods associated with ascidians (Tunicata), pp. 1-6 in Megataxa 4 (1) on page 454, DOI: 10.11646/megataxa.4.1.1, http://zenodo.org/record/4591138
Heterotic strings on homogeneous spaces
Creators: name: Israel, Dan
name: Kounnas, Costas
name: Orlando, Domenico
name: Petropoulos, P. Marios
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct heterotic string backgrounds corresponding to families of homogeneous spaces as exact conformal field theories. They contain left cosets of compact groups by their maximal tori supported by NS-NS 2-forms and gauge field fluxes. We give the general formalism and modular-invariant partition functions, then we consider some examples such as SU(2)/U(1) ~ S^2 (already described in a previous paper) and the SU(3)/U(1)^2 flag space. As an application we construct new supersymmetric string vacua with magnetic fluxes and a linear dilaton.
description: JHEP style; 47 pages, one figure
Az EU-s támogatások és a tagállamok közigazgatásának kapcsolata
Creators: name: Toth, Tamas
name: Naar-Toth, Zsuzsanna
name: Toth, Tamas
name: Naar-Toth, Zsuzsanna
Publisher: name: Unknown
Year: 2009
Subjects: subject: Agricultural and Food Policy
subject: International Development
subject: támogatás
subject: közigazgatás
subject: forrásfelhasználás
subject: subsidy
subject: public administration
subject: utilisation of funds

description: Az Európai Unió regionális politikájának intézményi háttere jogszabályokban került lefektetésre. Az intézményrendszer felállítása és működtetése az EU-tárgyalásoknak is kiemelt témája volt. A megkövetelt végrehajtási rendszer minden tagállamban – akár régi, akár újonnan csatlakozott – a meglévő közigazgatási rendszerre épült. Ugyanakkor nem lényegtelen, hogy míg az ún. régi tagállamok, és ezért maga az EU-szabályozás is már az elmúlt 25-35 évben a „New Public Management” eszméjében élt és fejlődött, addig az újonnan csatlakozók még az ezredfordulón is inkább egy bürokratikus közigazgatást működtettek, és kevésbé volt jelen a szolgáltatói szemlélet, illetve eredményorientáció. Annak ellenére, hogy az új tagállamok jelentős időnyomásra állították fel intézményrendszerüket, és a közigazgatási kultúra változása is folyamatosan jelen van még ma is az uniós források felhasználásában (szigorúan pénzügyileg nézve), ez nem okozott hátrányt. A V4 országok a forráslehívások tekintetében nem egy régi tagállamot is megelőznek. Vagyis az az állítás, hogy nem tudjuk az EU-s forrásokat felhasználni, megdőlni látszik (persze a programok jogi, EU általi zárása még hátra van). ----------------------------------------- The institutional background for the Community regional policy was set forth in legal regulations. Setting up and operating the institutional system was a priority topic at the accession negotiations as well. The required implementation system was built on the existing system of public administration in every country, whether old or new Member State. It needs to be pointed out, however, that while the old Member States – and the Community regulations themselves – have existed and developed in an environment infused with the theory of ‘New Public Management’ over the last 25 to 35 years, the new Member States were running a rather bureaucratic public administration system even at the turn of the millennium. The aspects of being a service provider and of focusing on goals were less prominent. Despite the fact that the new Member States were under significant time pressure when setting up their institutional systems, and the culture of public administration is still evolving, utilisation of Community subsidies – from a strictly financial perspective – was not hindered. The V4 countries are ahead of more than one old member state in terms of the proportion of funds called down. There fore the claim that we are unable to utilise the Community funds seems to be overturned (of course the legal closing of the programmes by the Community has not yet been performed).
Összefogás mentheti meg a hazai méhészeteket
Creators: name: Nagy, Istvan
name: Nagy, Istvan
Publisher: name: Unknown
Year: 2009
Subjects: subject: Agribusiness
subject: Livestock Production/Industries
subject: akácméz
subject: fajtamézek
subject: mézértékesítés
subject: export
subject: összefogás
subject: robinia honey
subject: monofloral honeys
subject: honey marketing
subject: cooperation

description: A rendszerváltást követően az előző évtizedekben eredményesen működő kistermelői (háztáji) integrációs rendszer úgy szűnt meg, hogy nem lépett a helyébe más termelés- és felvásárlás-szervezést végző együttműködési forma. Figyelembe véve a kialakult helyzetet, valamint azt a tényt, hogy a mézexport az agrár-külkereskedelem lényeges szegmense – a magyar méz mint hungarikum, fontos exportcikk –, továbbá hogy a méhészet, mint pozitív externália a növénytermelésben és a kertészetben is jelentős szerepet játszik, mindenféleképpen szükséges a méhészetek pozíciójának erősítése. A mézgazdálkodásra vonatkozó vizsgálataink – interjúk, saját méz¬termelési tapasztalatok, az országos és uniós mézgazdálkodás összehasonlítása – alapján megállapítható, hogy a termelők összefogása nélkül nem oldható meg a termelők érdekérvényesítő képessége, méretbeni, technológiai-technikai fejlesztése és minőségvédelme. -------------------------------------- Following the abandonment of the Socialist system of government, the system of small farmers (home farmers), which had functioned successfully in the preceding decades, was discontinued. No new arrangements for cooperation in production and marketing was introduced to take its place, however. Considering that honey export is an important section of foreign trade in agricultural products, Hungarian honey is a Hungaricum and is a significant exported article, as well as the role of bee-keeping as a positive external effect on crop growing and horticulture, the position of apiaries would definitely need to be improved. Our inquiries concerning honey production and marketing – interviews, our own experience in apiculture, comparison of honey economics in Hungary and in the Community – led to the conclusion that cooperation between the producers is the only way to promote their interests, to improve their technology, to grow economically and to improve product quality.
Astronomical masers and Dicke's superradiance
Creators: name: Rajabi, Fereshteh
name: Houde, Martin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We consider the radiation properties and processes of a gas with a population inversion using the formalism based on the Maxwell-Bloch equations. We focus on the maser action and Dicke's superradiance to establish their relationship in the overall radiation process during the temporal evolution of the system as a function of position. We show that the maser action and superradiance are not competing phenomena but are rather complementary, and define two distinct limits for the intensity of radiation. Masers characterise the quasi-steady state limit, when the population inversion density and the polarisation amplitude vary on time-scales longer than those of non-coherent processes affecting their evolution (e.g., collisions), while superradiance defines the fast transient regime taking place when these conditions are reversed. We show how a transition from a maser regime to superradiance will take place whenever a critical threshold for the column density of the population inversion is reached, at which point a strong level of coherence is established in the system and a powerful burst of radiation can ensue during the transient regime. This critical level also determines the spatial region where a transition from the unsaturated to the saturated maser regimes will take place; superradiance can thus be seen as the intermediary between the two. We also quantify the gain in radiation intensity attained during the superradiance phase relative to the two maser regimes, and show how the strong coherence level during superradiance is well suited to explain observations that reveal intense and fast radiation flares in maser-hosting regions.
description: 15 pages, 9 figures, accepted MNRAS
Non-Abelian tensor gauge fields: generalization of Yang-Mills theory
Creators: name: Savvidy, George
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We suggest an extension of the gauge principle which includes tensor gauge fields. The extended non-Abelian gauge transformations of the tensor gauge fields form a new large group. On this group one can define field strength tensors, which are transforming homogeneously with respect to the extended gauge transformations. The invariant Lagrangian is quadratic in the field strength tensors and describes interaction of tensor gauge fields of arbitrary large integer spin $1,2,...$. It does not contain higher derivatives of the tensor gauge fields, and all interactions take place through three- and four-particle exchanges with dimensionless coupling constant. In this extension of the Yang-Mills theory the vector gauge boson becomes a member of a bigger family of tensor gauge bosons. We shall present a second invariant Lagrangian which can be constructed in terms of the above field strength tensors. The total Lagrangian is a sum of the two Lagrangians and exhibits enhanced local gauge invariance with double number of gauge parameters. This allows to eliminate all negative norm states of the nonsymmetric second-rank tensor gauge field, which describes therefore three physical polarizations: two symmetric polarizations of helicity-two massless charged tensor gauge bosons and antisymmetric polarization of helicity-zero charged B field.
description: LaTex file, 21 pages,
Modified Gravity (MOG), Cosmology and Black Holes
Creators: name: Moffat, J. W.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: A covariant modified gravity (MOG) is formulated by adding to general relativity two new degrees of freedom, a scalar field gravitational coupling strength $G= 1/χ$ and a gravitational spin 1 vector field $ϕ_μ$. The $G$ is written as $G=G_N(1+α)$ where $G_N$ is Newton's constant, and the gravitational source charge for the vector field is $Q_g=\sqrt{αG_N}M$, where $M$ is the mass of a body. Cosmological solutions of the theory are derived in a homogeneous and isotropic cosmology. Black holes in MOG are stationary as the end product of gravitational collapse and are axisymmetric solutions with spherical topology. It is shown that the scalar field $χ$ is constant everywhere for an isolated black hole with asymptotic flat boundary condition. A consequence of this is that the scalar field loses its monopole moment radiation.
description: 8 pages, no figures. Changes made to comply with published paper. Paper accepted for publication by Journal of Cosmology and Astroparticle Physics. Text corrected to match published paper
Combating international terrorism : a study of whether the responses by the UK and US to the events of 9/11 are compatible with respect for fundamental human rights
Creators: name: Walewski, Paul M. A.
Publisher: name: University of British Columbia
Year: 2009

description: On Tuesday 11 September 2001, four commercial planes were hijacked by terrorists. One hijacked passenger jet leaving Boston, Massachusetts crashed into the north tower of the World Trade Centre at 8.45 a.m. setting the tower on fire. Eighteen minutes later, a second hijacked akliner, United Airlines Flight 175 from Boston, crashed into the south tower of the World Trade Centre and exploded. Later that morning both the north and south towers collapsed, plummeting into the streets below. At 9.43 a.m., a third hijacked airliner (American Airlines Flight 77) crashed into the Pentagon sending up a huge plummet of smoke. A portion of the building later collapsed. At 10.10 a.m. a fourth hijacked airliner (United Airlines Flight 93) crashed into Somerset County, Pennsylvania, south-east of Pittsburgh. The crashing o f these hijacked airliners into buildings and on land were the worst terrorist attacks in the history o f the United States. They led to the loss of thousands of innocent lives and damaged property running into billions of dollars. The attacks were heralded as not only terrorist attacks on the US, but also an attack on the entire global community. The atrocities led to the most dramatic amendment to anti-terrorism legislation ever known, both within the United States and the United Kingdom. The new antiterrorism legislation in both nations however, has been widely criticised as not being compatible with respect for fundamental human rights, due to its hasty enactment. This thesis analyses the responses and new anti-terrorism legislation in both countries examining the question: do they deprive international human rights?
Finanszírozási lehetőségeka magyar–orosz kereskedelemben
Creators: name: Tegla, Imre
name: Tegla, Imre
Publisher: name: Unknown
Year: 2009
Subjects: subject: Agribusiness
subject: International Relations/Trade
subject: orosz gazdasági kapcsolatok
subject: exportfinanszírozási konstrukciók
subject: Russian economic ties
subject: export financing arrangements.

description: A dolgozat bemutatja azokat az exportfinanszírozási konstrukciókat, melyek aktívabb alkalmazása több eredményt hozhat a magyar exportőröknek az orosz piacon. Sokéves tapasztalataim – mint banki finanszírozó és mint gyakorló exportőr – azt bizonyítják, hogy az orosz piacon van helye a magyar áruknak és szolgáltatásoknak, s jóval nagyobb helyet is betölthetnének, ha a meglévő és elérhető pénzügyi eszközöket jobban használnák. Oroszország keresi helyét a világban, és ambiciózus terveket valósít meg néhány területen a még elavult, főleg infrastrukturális lemaradása lefaragásában. Ezek óriási lehetőségek a mezőgazdasági, egészségügyi és építőipari ágazatokban. ---------------------------------- The paper presents export financing arrangements which could make Hungarian exporters more successful in the Russian market if used more actively. My own experience of many years – both as a bank financer and a practicing exporter – proves that the Russia market can accommodate Hungarian goods and services, and they could gain a much bigger share of the market if the existing and accessible financial tools were used more effectively. Russia is trying to find it own place in the world. It is implementing ambitious plans in certain fields to close the gap it still has in terms of infrastructure. This offers great opportunities for the agricultural, health care and construction industries.
An analysis of farmers’ behaviour and rewarded provision of public goods
Creators: name: Roel, Jongeneel
name: Ge, Lan
name: Roel, Jongeneel
name: Ge, Lan
Publisher: name: Unknown
Year: 2010
Subjects: subject: Community/Rural/Urban Development
subject: Farmers’ behaviour
subject: provision of public goods
subject: jointness
subject: Common Agricultural Policy (CAP)

description: Aiming to stimulate the role of agriculture as provider of public goods, the new CAP reform raises many theoretical and practical questions. The most relevant ones concern farmers’ response to the policy instruments. This paper uses a formal model to analyse the incentives and constraints generated by policy instruments and their potential impact on farmers’ participation decision. The analysis shows that, when choosing policy instruments to stimulate provision of public good, it is important to take into account different degrees and mechanisms of jointness between commodity and non-commodity (potentially public good) production, as they can enhance or erode the desired effect of the policy instruments. Some implications for modelling and policy analysis are discussed.
Collider Phenomenology of the Higgsless Models
Creators: name: Birkedal, Andreas
name: Matchev, Konstantin
name: Perelstein, Maxim
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We identify and study the signatures of the recently proposed Higgsless models at the Large Hadron Collider (LHC). We concentrate on tests of the mechanism of partial unitarity restoration in the longitudinal vector boson scattering, which is crucial to the phenomenological success of any Higgsless model and does not depend on the model-building details. We investigate the discovery reach for charged massive vector boson resonances and show that all of the preferred parameter space will be probed with 100 inverse fb of LHC data. Unitarity restoration requires that the masses and couplings of the resonances obey certain sum rules. We discuss the prospects for their experimental verification at the LHC.
description: 5 pages, 3 figures, uses RevTeX and axodraw. Reference added, minor editorial changes, version to appear in Phys. Rev. Lett
Rural development policy delivery and governance in Greece
Creators: name: Papadopoulou, Eleni
name: Christos, Papalexiou
name: Hasanagas, Nikolaos
name: Ventouri, Eirini
name: Papadopoulou, Eleni
name: Christos, Papalexiou
name: Hasanagas, Nikolaos
name: Ventouri, Eirini
Publisher: name: Unknown
Year: 2010
Subjects: subject: Community/Rural/Urban Development
subject: Rural Development Programme
subject: policy implementation
subject: governance
subject: administration

description: The main purpose of this research is focused on understanding the politico-administrative system and structure of rural policy implementation in the third programming period (2000-2006). Case studies have been conducted for selected measures of the Greek Rural Development Programme (RDP) and LEADER+ initiative. In-depth interviews were conducted with officials involved in the rural development policy implementation. Inflexibility due to centralization, lack of personnel motivation and inadequacy of the personnel involved in policy implementation are the main weaknesses. Work seasonal overload is also a weakness, which can be caused by peak periods or by too many and in part possibly unnecessary documents, official permissions and other legal or administrative obligations. The administrative personnel should be better motivated by financial bonus and properly trained. A central integrated database, accessible to all administrative levels and units, should also be designed. Such changes could lead to a smoother decentralisation process because in some cases centralisation is considered to cause communication obstacles, work overload and delays.
Comment on: "Neutron star under homotopy perturbation method" Ann. Phys. 409 (2019) 167918
Creators: name: Fernández, Francisco M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this comment we discuss the application of homotopy perturbation method to a nonlinear differential mass equation that solves the Tolman-Oppenheimer-Volkoff equation for an isotropic and spherically symmetric system. We show that one obtains the same results, more easily and straightforwardly, by means of a textbook power-series method.
Calprotectin, a Promising Serological Biomarker for the Early Diagnosis of Superinfections with Multidrug-Resistant Bacteria in Patients with COVID-19
Creators: name: Keller, Dennis
name: Mester, Patricia
name: Räth, Ulrich
name: Krautbauer, Sabrina
name: Schmid, Stephan
name: Greifenberg, Verena
name: Müller, Martina
name: Kunst, Claudia
name: Buechler, Christa
name: Pavel, Vlad
Publisher: name: Universität Regensburg
Year: 2024
Subjects: subject: calprotectin; biomarker; critical care; bloodstream infections; COVID-19
subject: 610 Medizin

description: Bacterial and fungal superinfections are common in COVID-19, and early diagnosis can enable timely intervention. Serum calprotectin levels increase with bacterial, fungal, and viral infections. This study evaluated serum calprotectin as a diagnostic and prognostic tool for microbial superinfections in COVID-19. Serum samples from adult patients with moderate and severe COVID-19 were collected during hospitalization from 2020 to 2024. Calprotectin levels were measured using an enzyme-linked immunosorbent assay in 63 patients with moderate COVID-19, 60 patients with severe COVID-19, and 34 healthy individuals. Calprotectin serum levels were elevated in patients with moderate COVID-19 compared with controls, and these levels were further increased in the severe cases. Patients with severe COVID-19 and vancomycin-resistant enterococci (VRE) bacteremia had elevated calprotectin levels, but their C-reactive protein and procalcitonin levels were not increased. Fungal superinfections and herpes simplex virus reactivation did not change the calprotectin levels. A calprotectin concentration of 31.29 µg/mL can be used to diagnose VRE bloodstream infection with 60% sensitivity and 96% specificity. These data suggest that serum calprotectin may be a promising biomarker for the early detection of VRE bloodstream infections in patients with COVID-19.
Lessons Learned from Designing an AI-Enabled Diagnosis Tool for Pathologists
Creators: name: Gu, Hongyan
name: Huang, Jingbin
name: Hung, Lauren
name: Chen, Xiang 'Anthony'
Publisher: name: arXiv
Year: 2020
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Image and Video Processing (eess.IV)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Despite the promises of data-driven artificial intelligence (AI), little is known about how we can bridge the gulf between traditional physician-driven diagnosis and a plausible future of medicine automated by AI. Specifically, how can we involve AI usefully in physicians' diagnosis workflow given that most AI is still nascent and error-prone (e.g., in digital pathology)? To explore this question, we first propose a series of collaborative techniques to engage human pathologists with AI given AI's capabilities and limitations, based on which we prototype Impetus - a tool where an AI takes various degrees of initiatives to provide various forms of assistance to a pathologist in detecting tumors from histological slides. We summarize observations and lessons learned from a study with eight pathologists and discuss recommendations for future work on human-centered medical AI systems.
description: 25 pages, 5 figures. To appear in the 24th ACM Conference on Computer-Supported Cooperative Work and Social Computing (CSCW 2021)
Politico-administrative scenario evaluation through quantitative network analysis: Using Measure 121 (modernization of agricultural holdings) of Axis 1 as an illustration
Creators: name: Papadopoulou, Eleni
name: Ventouri, Eirini
name: Hasanagas, Nikolaos
name: Papalexiou, Christos
name: Papadopoulou, Eleni
name: Ventouri, Eirini
name: Hasanagas, Nikolaos
name: Papalexiou, Christos
Publisher: name: Unknown
Year: 2010
Subjects: subject: Community/Rural/Urban Development
subject: rural development programme
subject: agricultural holdings
subject: politico-administrative system

description: In Greece, there is a fostered policy for the modernization of agricultural holdings. This aims in order at improving productivity and environmental performance within a highly competitive international environment. The main research questions are to find what structural changes are desirable or possible to appear in the politico-administrative hierarchy from the 3rd to the 4th Programming Period. Issues of power centralization, information management, dogmatism and conflict are examined. The main method applied for this purpose is the Quantitative Network Analysis. Primary data were collected with standardized questionnaires. State officials have been interviewed. Three scenarios are extracted: a) the real situation of the 3rd PP, b) the desirable situation of the 4th PP, and the probable situation of the 4th PP. Informal hierarchies are measured and visualized. The operationalization of the power dimensions and the other types of links is of crucial importance for the validity and reliability of the results. The results can be useful for policy consulting, if one compares the “probable” and “desirable” scenarios of the 4th PP with the past situation of 3rd PP and particular suggestions can be made. Greece is characterized by a top-down approach of rural development. The process of design and delivery is strongly centralized, and this leads to inflexibility. The bureaucratic procedures and the requirement of too many and possibly unnecessary documents are usual obstacles. The participants present ambitious desires but they also are realists rather than over-optimists concerning the simplicity of the procedures. They believe that the experience of the past can become a lesson for a realistic and not over-optimistic improvement.
Markov Chain Monte Carlo Predictions of Neutron-rich Lanthanide Properties as a Probe of $r$-process Dynamics
Creators: name: Vassh, Nicole
name: McLaughlin, Gail C.
name: Mumpower, Matthew R.
name: Surman, Rebecca
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Lanthanide element signatures are key to understanding many astrophysical observables, from merger kilonova light curves to stellar and solar abundances. To learn about the lanthanide element synthesis that enriched our solar system, we apply the statistical method of Markov Chain Monte Carlo to examine the nuclear masses capable of forming the $r$-process rare-earth abundance peak. We describe the physical constraints we implement with this statistical approach and demonstrate the use of the parallel chains method to explore the multidimensional parameter space. We apply our procedure to three moderately neutron-rich astrophysical outflows with distinct types of $r$-process dynamics. We show that the mass solutions found are dependent on outflow conditions and are related to the $r$-process path. We describe in detail the mechanism behind peak formation in each case. We then compare our mass predictions for neutron-rich neodymium and samarium isotopes to the latest experimental data from the CPT at CARIBU. We find our mass predictions given outflows that undergo an extended (n,$γ$)$\rightleftarrows$($γ$,n) equilibrium to be those most compatible with both observational solar abundances and neutron-rich mass measurements.
Selective coherence transfers in homonuclear dipolar coupled spin systems
Creators: name: Ramanathan, Chandrasekhar
name: Sinha, Suddhasattwa
name: Baugh, Jonathan
name: Havel, Timothy F.
name: Cory, David G.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Mapping the physical dipolar Hamiltonian of a solid-state network of nuclear spins onto a system of nearest-neighbor couplings would be extremely useful for a variety of quantum information processing applications, as well as NMR structural studies. We demonstrate such a mapping for a system consisting of an ensemble of spin pairs, where the coupling between spins in the same pair is significantly stronger than the coupling between spins on different pairs. An amplitude modulated RF field is applied on resonance with the Larmor frequency of the spins, with the frequency of the modulation matched to the frequency of the dipolar coupling of interest. The spin pairs appear isolated from each other in the regime where the RF power (omega_1) is such that omega_weak << omega_1 << omega_strong. Coherence lifetimes within the two-spin system are increased from 19 us to 11.1 ms, a factor of 572.
description: 4 pages. Paper re-submitted with minor changes to clarify that the scheme demonstrated is not an exact mapping onto a nearest neighbor system. However, this is the first demonstration of a controlled evolution in a subspace of an extended spin system, on a timescale that is much larger than the dipolar dephasing time