cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Intervju med Jacobsen, Edel
Creators: name: Krogstad, John Atle
Publisher: name: Unknown
Year: 1975
Subjects: Jacobsen, Edel

description: Intervju utført av John Atle Krogstad i forbindelse med hans hovedoppgave fra 1975 "Kommunistene i Trøndelag 1936-45: kamp mot krig og fascisme". Omhandler blant annet evakuering til Byneset, illegal avis og arrestasjon, pengeunderstøttelse.
On a nonlinear parabolic problem arising in the quantum diffusive description of a degenerate fermion gas
Creators: name: Barletti, Luigi
name: Salvarani, Francesco
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: This article studies, both theoretically and numerically, a nonlinear drift-diffusion equation describing a gas of fermions in the zero-temperature limit. The equation is considered on a bounded domain whose boundary is divided into an "insulating" part, where homogeneous Neumann conditions are imposed, and a "contact" part, where nonhomogeneous Dirichlet data are assigned. The existence of stationary solutions for a suitable class of Dirichlet data is proven by assuming a simple domain configuration. The long-time behavior of the time-dependent solution, for more complex domain configurations, is investigated by means of numerical experiments.
Intervju med Johnsen, Øistein
Creators: name: Krogstad, John Atle
Publisher: name: Unknown
Year: 1974
Subjects: Johnsen, Øistein

description: Intervju utført av John Atle Krogstad i forbindelse med hans hovedoppgave fra 1975 "Kommunistene i Trøndelag 1936-45: kamp mot krig og fascisme". Omhandler blant annet politisk aktivitet under Finlandskrigen, møte med Carsten Wærdahl og Kristoffer Svendsen 8. april 1940, illegalt arbeid, rapportering til Wærdahl, AUF, NGU, IOGT, Spaniakomiteen, Thingstadgruppa, Adding-gruppen.
Intervju med Jacobsen, Harry
Creators: name: Krogstad, John Atle
Publisher: name: Unknown
Year: 1974
Subjects: Jacobsen, Harry

description: Intervju utført av John Atle Krogstad i forbindelse med hans hovedoppgave fra 1975 "Kommunistene i Trøndelag 1936-45: kamp mot krig og fascisme". Omhandler blant annet Henry Thingstad, antikrigsmøtet mars 1940, antifascistisk arbeid, arrestasjon av Thornæs, tillitsverv TKU, illegale aviser, om grupperinger i ungdomslaget, Fritjof Holthe, Alfred Warnes, Finlandskrigen, reaksjoner blant kommunister etter 9. april. Biografiske opplysninger.
Intervju med Jacobsen, Jacob C.
Creators: name: Krogstad, John Atle
Publisher: name: Unknown
Year: 1974
Subjects: Jacobsen, Jacob C.

description: Intervju utført av John Atle Krogstad i forbindelse med hans hovedoppgave fra 1975 "Kommunistene i Trøndelag 1936-45: kamp mot krig og fascisme". Omhandler blant annet møte på Falstad under krigen mellom Arne Johansen og Alfred Warnes, møte på Angleterre 9. april 1940, AIF, NGU, forhør 1940, illegale aviser, om flukt for Thingstad med flere i 1943.
Intervju med Jacobsen, Odd W.
Creators: name: Krogstad, John Atle
Publisher: name: Unknown
Year: 1974
Subjects: Jacobsen, Odd W.

description: Intervju utført av John Atle Krogstad i forbindelse med hans hovedoppgave fra 1975 "Kommunistene i Trøndelag 1936-45: kamp mot krig og fascisme". Brev og intervjuer. Omhandler blant annet besøk i Oslo februar 1941 med møter med Emil Løvlien, Lars Nordbø og Arne Gauslå. Avhør hos tyskerne, illegale møter, arrestasjon, om kontakt mellom Thingstad og Wærnes, eksklusjon fra AIF, Alfred Warnes, Ørnulf Bakke, Martin Brendberg, bevilgninger til Spania og den spanske borgerkrigen, "Spesialoppdraget", møtet på Torvet 1939. Biografiske opplysninger. Finlandskrigen, Vestkanten AUL, AIF og avholdsbevegelsens rolle, idrettslag, Rinnan.
Charm physics at Belle
Creators: name: Yabsley, Bruce
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: This talk reviews an unrepresentative selection of Belle's open-charm and charmonium analyses, focussing on new developments and topics of interest to the DIS community. Highlights include an X(3872) analysis favoring J^PC = 1++, and the D0-D*0bar bound-state interpretation.
description: 4 pages, 2 figures, talk presented at DIS'05, Madison, WI. v2: corrected a typo in the summary
Intervju med Kjennerud, Ole
Creators: name: Krogstad, John Atle
Publisher: name: Unknown
Year: 1974
Subjects: Kjennerud, Ole

description: Intervju utført av John Atle Krogstad i forbindelse med hans hovedoppgave fra 1975 "Kommunistene i Trøndelag 1936-45: kamp mot krig og fascisme". Omhandler blant annet trønderske frivillige til Spania, ikke-angrepspakten, illegal partiorganisering, arrestasjon.
Transfers in coarse homology
Creators: name: Bunke, Ulrich
name: Engel, Alexander
name: Kasprowski, Daniel
name: Winges, Christoph
Publisher: name: Mathematisches Institut (Universität Münster)
Year: 2020
Subjects: subject: 510 Mathematics

description: We enlarge the category of bornological coarse spaces by adding transfer morphisms and introduce the notion of an equivariant coarse homology theory with transfers. We then show that equivariant coarse algebraic K-homology and equivariant coarse ordinary homology can be extended to equivariant coarse homology theories with transfers. In the case of a finite group, we observe that equivariant coarse homology theories with transfers provide Mackey functors. We express standard constructions with Mackey functors in terms of coarse geometry, and we demonstrate the usage of transfers in order to prove injectivity results about assembly maps.
Collisions of solitons and vortex rings in cylindrical Bose-Einstein condensates
Creators: name: Komineas, Stavros
name: Brand, Joachim
Publisher: name: arXiv
Year: 2005
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Interactions of solitary waves in a cylindrically confined Bose-Einstein condensate are investigated by simulating their head-on collisions. Slow vortex rings and fast solitons are found to collide elastically contrary to the situation in the three-dimensional homogeneous Bose gas. Strongly inelastic collisions are absent for low density condensates but occur at higher densities for intermediate velocities. The scattering behaviour is rationalised by use of dispersion diagrams. During inelastic collisions, spherical shell-like structures of low density are formed and they eventually decay into depletion droplets with solitary wave features. The relation to similar shells observed in a recent experiment [Ginsberg et al. Phys Rev. Lett. 94, 040403 (2005)] is discussed.
Functional Renormalization for pinned elastic systems away from their steady states
Creators: name: Schehr, Gregory
name: Doussal, Pierre Le
Publisher: name: arXiv
Year: 2005
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Using one loop functional RG we study two problems of pinned elastic systems away from their equilibrium or steady states. The critical regime of the depinning transition is investigated starting from a flat initial condition. It exhibits non trivial two-time dynamical regimes with exponents and scaling functions obtained in a dimensional expansion. The aging and equilibrium dynamics of the super-rough glass phase of the random Sine-Gordon model at low temperature is found to be characterized by a single dynamical exponent $z \approx c/T$, where $c$ compares well with recent numerical work. This agrees with the thermal boundary layer picture of pinned systems.
description: 5 pages
The nearly Newtonian regime in Non-Linear Theories of Gravity
Creators: name: Sotiriou, Thomas P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The present paper reconsiders the Newtonian limit of models of modified gravity including higher order terms in the scalar curvature in the gravitational action. This was studied using the Palatini variational principle in [Meng X. and Wang P.: Gen. Rel. Grav. {\bf 36}, 1947 (2004)] and [Domínguez A. E. and Barraco D. E.: Phys. Rev. D {\bf 70}, 043505 (2004)] with contradicting results. Here a different approach is used, and problems in the previous attempts are pointed out. It is shown that models with negative powers of the scalar curvature, like the ones used to explain the present accelerated expansion, as well as their generalization which include positive powers, can give the correct Newtonian limit, as long as the coefficients of these powers are reasonably small. Some consequences of the performed analysis seem to raise doubts for the way the Newtonian limit was derived in the purely metric approach of fourth order gravity [Dick R.: Gen. Rel. Grav. {\bf 36}, 217 (2004)]. Finally, we comment on a recent paper [Olmo G. J.: Phys. Rev. D {\bf 72}, 083505 (2005)] in which the problem of the Newtonian limit of both the purely metric and the Palatini formalism is discussed, using the equivalent Brans--Dicke theory, and with which our results partly disagree.
description: typos corrected, replaced to match published version
Multiple scattering camouflaged as magnetic stripes in single crystals of superconducting (La,Sr)$_2$CuO$_4$
Creators: name: Ţuţueanu, A. -E.
name: Tejsner, T. B.
name: Lǎcǎtuşu, M. E.
name: Hansen, H. W.
name: Eliasen, K. L.
name: Boehm, M.
name: Steffens, P.
name: Niedermayer, C.
name: Lefmann, K.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Neutron diffraction has been a very prominent tool to investigate high-temperature superconductors, in particular through the discovery of an incommensurate magnetic signal known as stripes. We here report the findings of a neutron diffraction experiment on the superconductor (La,Sr)$_2$CuO$_4$, where a spurious signal appeared to be magnetic stripes. The signal strength was found to be strongly dependent on the neutron energy, peaking at $E = 4.6$~meV. We therefore attribute the origin of this signal to be a combination of multiple scattering and crystal twinning. A forward calculation of the scattering intensity including these two effects almost completely recovers our experimental observations. We emphasise the need for employing such analysis when searching for ways to avoid spurious scattering signals.
description: 8 pages, 5 figures
Intervju med Kolstad, Arne
Creators: name: Krogstad, John Atle
Publisher: name: Unknown
Year: 1975
Subjects: Kolstad, Arne

description: Intervju utført av John Atle Krogstad i forbindelse med hans hovedoppgave fra 1975 "Kommunistene i Trøndelag 1936-45: kamp mot krig og fascisme". Biografisk informasjon om Arne Kolstad. Omhandler blant annet illegal aktivitet med blant andre Trygve Eidem, Even Flatreit og William Kristiansen.
Asymptotic charges in 3d gravity with torsion
Creators: name: Blagojevic, M.
name: Cvetkovic, B.
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We discuss some new developments in three-dimensional gravity with torsion, based on Riemann-Cartan geometry. Using the canonical approach, we study the structure of asymptotic symmetry, clarify its fundamental role in defining the gravitational conserved charges, and explore the influence of the asymptotic structure on the black hole entropy.
description: 6 pages, LATEX file (+jpconf.cls,jpconf11.clo), Talk presented at Constrained Dynamics and Quantum Gravity 05, Cala Gonone (Sardinia, Italy), September 12-16, 2005
Jedin, Hubert, Krisis und Abschluß des Trienter Konzils 1562/63
Creators: name: Schweigart, Hans Günther
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 13 Nr. 4 (1964): Ökumenische Rundschau, Band 13, Heft 4
Cloning of Gaussian states by linear optics
Creators: name: Olivares, Stefano
name: Paris, Matteo G. A.
name: Andersen, Ulrik L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We analyze in details a scheme for cloning of Gaussian states based on linear optical components and homodyne detection recently demonstrated by U. L. Andersen et al. [PRL 94 240503 (2005)]. The input-output fidelity is evaluated for a generic (pure or mixed) Gaussian state taking into account the effect of non-unit quantum efficiency and unbalanced mode-mixing. In addition, since in most quantum information protocols the covariance matrix of the set of input states is not perfectly known, we evaluate the average cloning fidelity for classes of Gaussian states with the degree of squeezing and the number of thermal photons being only partially known.
description: 8 pages, 7 figures
Proca-stinated Cosmology I: A N-body code for the vector Galileon
Creators: name: Becker, Christoph
name: Arnold, Christian
name: Li, Baojiu
name: Heisenberg, Lavinia
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We investigate the nonlinear growth of large-scale structure in the generalised Proca theory, in which a self-interacting massive vector field plays the role of driving the acceleration of the cosmic expansion. Focusing to the Proca Lagrangian at cubic order -- the cubic vector Galileon model -- we derive the simplified equations for gravity as well as the longitudinal and transverse modes of the vector field under the weak-field and quasi-static approximations, and implement them in a modified version of the ECOSMOG N-body code. Our simulations incorporate the Vainshtein screening effect, which reconciles the fifth force propagated by the longitudinal mode of the cubic vector Galileon model with local tests of gravity. The results confirm that for all scales probed by the simulation, the transverse mode has a negligible impact on structure formation in a realistic cosmological setup. It is well known that in this model the strength of the fifth force is controlled by a free model parameter, which we denote as beta_3. By running a suite of cosmological simulations for different values of beta_3, we show that this parameter also determines the effectiveness of the Vainshtein screening. The model behaves identically to the cubic scalar Galileon for beta_3 going to zero, in which the fifth force is strong in unscreened regions but is efficiently screened in high-density regions. In the opposite limit, beta_3 going to infinity, the model approaches its `quintessence' counterpart, which has a vanishing fifth force but a modified expansion history compared to LambdaCDM. This endows the model with rich phenomenology, which will be investigated in future works.
description: 32 pages, 7 figures, version to appear in JCAP
Intervju med Kristensen, Bendik
Creators: name: Krogstad, John Atle
Publisher: name: Unknown
Year: 1975
Subjects: Kristensen, Bendik

description: Intervju utført av John Atle Krogstad i forbindelse med hans hovedoppgave fra 1975 "Kommunistene i Trøndelag 1936-45: kamp mot krig og fascisme". Omhandler blant annet den politisk situasjonen i Meråker, anti-fascistisk aktivitet, NKP/DNA, Finlandskrigen, Henry Thingstad, kontakt med Trondheim.
Dark Energy Evolution and the Curvature of the Universe from Recent Observations
Creators: name: Ichikawa, Kazuhide
name: Takahashi, Tomo
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss the constraints on the time-varying equation of state for dark energy and the curvature of the universe using observations of type Ia supernovae from Riess et al. and the most recent Supernova Legacy Survey (SNLS), the baryon acoustic oscillation peak detected in the SDSS luminous red galaxy survey and cosmic microwave background. Due to the degeneracy among the parameters which describe the time dependence of the equation of state and the curvature of the universe, the constraints on them can be weakened when we try to constrain them simultaneously, in particular when we use a single observational data. However, we show that we can obtain relatively severe constraints when we use all data sets from observations above even if we consider the time-varying equation of state and do not assume a flat universe. We also found that the combined data set favors a flat universe even if we consider the time variation of dark energy equation of state.
description: 17 pages, 12 figures, references added
Free speech on the global internet : the role of e-commerce
Creators: name: Khangura, Harinder Singh
Publisher: name: University of British Columbia
Year: 2009

description: The Internet has truly become a worldwide phenomenon in recent years, with more and more countries coming online every day. The new global economy that the Internet enables is the main catalyst behind this embrace of the Internet by even the most closed societies. However, the wide variety of material available on the Internet presents a problem for legislators all over the world, and as a result a broad range of free speech policies have been adopted by governments. The focus of this thesis is to find possible relations between the e-commerce concerns that a particular country has and the free speech policy that it chooses. Having these relations can help to predict how a free speech policy will change over time. The thesis starts with a description of blocking and filtering, as that is central to the free speech policies in many countries. Next, a survey of the free speech policies and e-commerce statistics for countries from all major regions of the world is presented. This data is analyzed to determine how e-commerce concerns can affect the free speech policy of a country. Finally, trends on how free speech policies can change over time due to economic factors are outlined.
A topological definition of the Maslov bundle
Creators: name: Anné, Colette
Publisher: name: arXiv
Year: 2006
Subjects: subject: Differential Geometry (math.DG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 81Q20,35S30,47G30

description: We give a definition of the Maslov fibre bundle for a lagrangian submanifold of the cotangent bundle of a smooth manofold. This definition generelizes the definition given, in homotopic terms, by Arnol'd for lagrangian submanifolds of the cotangent bundle of the euclidean space and coincides with the one of Hörmander in his works about Fourier Inegral Operators.
Towards deterministic optical quantum computation with coherently driven atomic ensembles
Creators: name: Petrosyan, David
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Scalable and efficient quantum computation with photonic qubits requires (i) deterministic sources of single-photons, (ii) giant nonlinearities capable of entangling pairs of photons, and (iii) reliable single-photon detectors. In addition, an optical quantum computer would need a robust reversible photon storage devise. Here we discuss several related techniques, based on the coherent manipulation of atomic ensembles in the regime of electromagnetically induced transparency, that are capable of implementing all of the above prerequisites for deterministic optical quantum computation with single photons.
description: 11 pages, 7 figures
Intervju med Larsen, Edith
Creators: name: Krogstad, John Atle
Publisher: name: Unknown
Year: 1975
Subjects: Larsen, Edith

description: Intervju utført av John Atle Krogstad i forbindelse med hans hovedoppgave fra 1975 "Kommunistene i Trøndelag 1936-45: kamp mot krig og fascisme". Omhandler blant annet illegalt arbeid, Carsten Wærdahl, Reidar Wærdahl, Arvid Austad. Biografiske opplysninger om Edith Larsen.
Vortex State of Tl$_2$Ba$_2$CuO$_{6+δ}$ via $^{205}$Tl NMR at 2 Tesla
Creators: name: Itoh, Y.
name: Michioka, C.
name: Yoshimura, K.
name: Hayashi, A.
name: Ueda, Y.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report a $^{205}$Tl NMR study of vortex state for an aligned polycrystalline sample of an overdoped high-$T_c$ superconductor Tl$_2$Ba$_2$CuO$_{6+δ}$ ($T_{c}\sim$85 K) with magnetic field 2 T along the c axis. We observed an imperfect vortex lattice, so-called Bragg glass at $T$=5 K, coexistence of vortex solid with liquid between 10 and 60 K, and vortex melting between 65 and 85 K. No evidence for local antiferromagnetic ordering at vortex cores was found for our sample.
description: 4 pages with 5 figures
Intervju med Lian, Alfhild
Creators: name: Krogstad, John Atle
Publisher: name: Unknown
Year: 1975
Subjects: Lian, Alfhild

description: Intervju utført av John Atle Krogstad i forbindelse med hans hovedoppgave fra 1975 "Kommunistene i Trøndelag 1936-45: kamp mot krig og fascisme". Omhandler blant annet Alfred Warnes, TKU, husmorlag, forhold før krigen.
Finding and using exact solutions of the Einstein equations
Creators: name: MacCallum, M. A. H.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The evolution of the methods used to find solutions of Einstein's field equations during the last 100 years is described. Early papers used assumptions on the coordinate forms of the metrics. Since the 1950s more invariant methods have been deployed in most new papers. The uses to which the solutions found have been put are discussed, and it is shown that they have played an important role in the development of many aspects, both mathematical and physical, of general relativity.
description: 15 pages, LaTeX2e, aipproc.cls, invited lecture to appear in the Proceedings of ERE05 (the Spanish Relativity Meeting), Oviedo, September 2005, to be published by the American Institute of Physics. v2: Remarks on black hole entropy corrected. Other minor changes
Intervju med Lian, Einar
Creators: name: Krogstad, John Atle
Publisher: name: Unknown
Year: 1975
Subjects: Lian, Einar

description: Intervju utført av John Atle Krogstad i forbindelse med hans hovedoppgave fra 1975 "Kommunistene i Trøndelag 1936-45: kamp mot krig og fascisme". Omhandler blant annet deltakelse i pionerbevegelsen før krigen, medlemskap i Ravn, illegal aktivitet, studievirksomhet, kurervirksomhet, Friheten, Henry Thingstad, Harald Rusten, flukt til Sverige. Biografiske opplysninger.
Intervju med Lie, Johan Petter
Creators: name: Krogstad, John Atle
Publisher: name: Unknown
Year: 1975
Subjects: Lie, Johan Petter

description: Intervju utført av John Atle Krogstad i forbindelse med hans hovedoppgave fra 1975 "Kommunistene i Trøndelag 1936-45: kamp mot krig og fascisme". Biografiske opplysninger. Omhandler blant annet hans tilhørighet til kommunismen, illegalt arbeid i Råkvåg, Henry Thingstad, illegale aviser, møte i Trondheim november 1941 og kontakt med Trondheim.
A cosmic equation of state for the inhomogeneous Universe: can a global far-from-equilibrium state explain Dark Energy?
Creators: name: Buchert, Thomas
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A system of effective Einstein equations for spatially averaged scalar variables of inhomogeneous cosmological models can be solved by providing a `cosmic equation of state'. Recent efforts to explain Dark Energy focus on `backreaction effects' of inhomogeneities on the effective evolution of cosmological parameters in our Hubble volume, avoiding a cosmological constant in the equation of state. In this Letter it is argued that, if kinematical backreaction effects are indeed of the order of the averaged density (or larger as needed for an accelerating domain of the Universe), then the state of our regional Hubble volume would have to be in the vicinity of a far-from-equilibrium state that balances kinematical backreaction and average density. This property, if interpreted globally, is shared by a stationary cosmos with effective equation of state $p_{\rm eff} = -1/3 ρ_{\rm eff}$. It is concluded that a confirmed explanation of Dark Energy by kinematical backreaction may imply a paradigmatic change of cosmology.
description: 7 pages, matches published version in Class. Quant. Grav
Intervju med Vestvik, Sverre og Ivar Lillesand
Creators: name: Krogstad, John Atle
Publisher: name: Unknown
Year: 1975
Subjects: Vestvik, Sverre og Ivar Lillesand

description: Intervju utført av John Atle Krogstad i forbindelse med hans hovedoppgave fra 1975 "Kommunistene i Trøndelag 1936-45: kamp mot krig og fascisme". Biografiske opplysninger. Omhandler blant annet om situasjonen på 1930-tallet på Verdal og ellers, situasjonen ved krigsutbruddet, kontakt med Henry Thingstad og Carsten Wærdahl, Vestviks arbeid fra Sverige, Rolf Nevermos flukt.
Heavy neutrino mass hierarchy from leptogenesis in left-right symmetric models with spontaneous CP-violation
Creators: name: Sahu, Narendra
name: Sankar, S. Uma
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider left-right symmetric model with spontaneous CP-violation. The Lagrangian of this model is CP invariant and the Yukawa couplings are real. Due to spontaneous breaking of the gauge symmetry, some of the neutral Higgses acquire complex vacuum expectation values, which lead to CP-violation. In the model considered here, we identify the neutrino Dirac mass matrix with that of Fritzsch type charged lepton mass matrix. We assume a hierarchical spectrum of the right handed neutrino masses and derive a bound on this hierarchy by assuming that the decay of the lightest right handed neutrino produces the baryon asymmetry via the leptogenesis route. It is shown that the mass hierarchy we obtain is compatible with the current neutrino oscillation data.
description: References added, Journal version, to appear in Nucl.Phys.B
High-responsivity graphene photodetectors integrated on silicon microring resonators
Creators: name: Schuler, Simone
name: Muench, Jakob E.
name: Ruocco, Alfonso
name: Balci, Osman
name: van Thourhout, Dries
name: Sorianello, Vito
name: Romagnoli, Marco
name: Watanabe, Kenji
name: Taniguchi, Takashi
name: Goykhman, Ilya
name: Ferrari, Andrea C.
name: Mueller, Thomas
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Graphene integrated photonics provides several advantages over conventional Si photonics. Single layer graphene (SLG) enables fast, broadband, and energy-efficient electro-optic modulators, optical switches and photodetectors (GPDs), and is compatible with any optical waveguide. The last major barrier to SLG-based optical receivers lies in the low responsivity - electrical output per optical input - of GPDs compared to conventional PDs. Here we overcome this shortfall by integrating a photo-thermoelectric GPD with a Si microring resonator. Under critical coupling, we achieve $>$90% light absorption in a $\sim$6 $μ$m SLG channel along the Si waveguide. Exploiting the cavity-enhanced light-matter interaction, causing carriers in SLG to reach $\sim$400 K for an input power of $\sim$0.6 mW, we get a voltage responsivity $\sim$90 V/W, demonstrating the feasibility of our approach. Our device is capable of detecting data rates up to 20 Gbit/s, with a receiver sensitivity enabling it to operate at a 10$^{-9}$ bit-error rate, on par with mature semiconductor technology. The natural generation of a voltage rather than a current, removes the need for transimpedance amplification, with a reduction of the energy-per-bit cost and foot-print, when compared to a traditional semiconductor-based receiver.
description: 11 pages, 5 figures
Scaling collapse and structure functions: Identifying self-affinity in finite length time series
Creators: name: Chapman, S. C.
name: Hnat, B.
name: Rowlands, G.
name: Watkins, N. W.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Empirical determination of the scaling properties and exponents of time series presents a formidable challenge in testing, and developing, a theoretical understanding of turbulence and other out-of-equilibrium phenomena. We discuss the special case of self affine time series in the context of a stochastic process. We highlight two complementary approaches to the differenced variable of the data: i) attempting a scaling collapse of the Probability Density Functions which should then be well described by the solution of the corresponding Fokker-Planck equation and ii) using structure functions to determine the scaling properties of the higher order moments. Using the example of a Lévy flight, we demonstrate a method for conditioning the time series that recovers the underlying self affine scaling in a finite length time series.
description: Submitted Nonlinear Processes in Geophysics, 18 pages including 8 figures
POTENTIAL COST SAVINGS AND FRAMEWORK OF STRATEGIES FOR IMPROVED DELIVERY OF GOVERNMENT SERVICES
Creators: name: Edelman, Mark A.
name: Edelman, Mark A.
Publisher: name: Unknown
Year: 2000
Subjects: Public Economics

description: This Preliminary Assessment represents a response to an important and timely request for information from the Governor's Strategic Planning Council. This report represents a limited response based on findings and principles from existing applied studies, academic literature, and input from a knowledgeable range of expertise from the private and public sectors represented on the Iowa Research Council Public Finance Study Development Committee. The intended purpose of this report is to provide a basis for discussion by the Governor's Strategic Planning Council as well as other state and local policymakers, leaders and citizens. The specific questions provided to the Iowa Research Council included: (1) Is there potential to generate significant savings from consolidation of public services across counties, schools and cities? (2) Will any potential savings from government consolidation be significant enough to fund major new statewide initiatives? (3) Is telecommunications technology changing the economies of scale for provision of public services? (4) What are the alternative strategies for efficient provision of public services in areas of growth and decline?
Intervju med Lund, Arne
Creators: name: Krogstad, John Atle
Publisher: name: Unknown
Year: 1974
Subjects: Lund, Arne

description: Intervju utført av John Atle Krogstad i forbindelse med hans hovedoppgave fra 1975 "Kommunistene i Trøndelag 1936-45: kamp mot krig og fascisme". Brev til Krogstad fra Arne Lund. Intervjuet omhandler blant annet arbeid i 1930-åra, illegalt arbeid, Henry Thingstad, kontakt med Wærnes, Rinnan, flukt til Sverige, forbindelse med Odd Jacobsen, Arvid Knutsen.
Giant bubble pinch-off
Creators: name: Bergmann, Raymond
name: van der Meer, Devaraj
name: Stijnman, Mark
name: Sandtke, Marijn
name: Prosperetti, Andrea
name: Lohse, Detlef
Publisher: name: arXiv
Year: 2006
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: Self-similarity has been the paradigmatic picture for the pinch-off of a drop. Here we will show through high-speed imaging and boundary integral simulations that the inverse problem, the pinch-off of an air bubble in water, is not self-similar in a strict sense: A disk is quickly pulled through a water surface, leading to a giant, cylindrical void which after collapse creates an upward and a downward jet. Only in the limiting case of large Froude number the neck radius $h$ scales as $h(-\log h)^{1/4} \propto τ^{1/2}$, the purely inertial scaling. For any finite Froude number the collapse is slower, and a second length-scale, the curvature of the void, comes into play. Both length-scales are found to exhibit power-law scaling in time, but with different exponents depending on the Froude number, signaling the non-universality of the bubble pinch-off.
description: 5 pages, 2 figures. Figure quality was reduced considerably and converted to greyscale to decrease file size
HUMAN CAPITAL, EDUCATION, AND AGRICULTURE
Creators: name: Huffman, Wallace E.
name: Huffman, Wallace E.
Publisher: name: Unknown
Year: 2000
Subjects: subject: Labor and Human Capital
subject: Schooling
subject: education
subject: human capital
subject: agriculture
subject: information technologies
subject: training
subject: global agriculture

description: Education is widely recognized as the most important form of human capital, and health as the second most important form. The primary focus is on schooling where private and social real rates of return remain high in low and middle income countries for elementary and secondary schooling. The paper reviews broad effects of education in agriculture, and examines some of the prospects and potential for the future. Conclusions include: (i) schooling cannot be viewed as unconditionally productive in agriculture. It s impact is conditioned by the price and technology environment and options for off-farm work and migration. (ii) With rapid advances and fall prices of communication and information technologies, farm people of the future will need strong basic schooling to adopt and use these technologies so as to participate successfully in the new global information system of the 21st century. The structure of agriculture seems likely to change dramatically during the first 25 years, and a new set of adjustments for farm families can be expected.
Intervju med Lyseth, Reidar
Creators: name: Krogstad, John Atle
Publisher: name: Unknown
Year: 1975
Subjects: Lyseth, Reidar

description: Intervju utført av John Atle Krogstad i forbindelse med hans hovedoppgave fra 1975 "Kommunistene i Trøndelag 1936-45: kamp mot krig og fascisme". Biografiske opplysninger. Oversikt over idrettslag tilsluttet Kampforbundet for Rød Sportsenhet. Omhandler blant annet bakgrunn for Kampforbundet, årsakene til samlingen 1934, solidaritet med Spania, illegal kamp, Thingstadgruppa.
Intervju med Løfsnes, Knut
Creators: name: Krogstad, John Atle
Publisher: name: Unknown
Year: 1974
Subjects: Løfsnes, Knut

description: Intervju utført av John Atle Krogstad i forbindelse med hans hovedoppgave fra 1975 "Kommunistene i Trøndelag 1936-45: kamp mot krig og fascisme". Omhandler blant annet kontakt med Arne Lund, Rinnan og Rinnanbanden, samarbeid mellom den norske legasjonen og det svenske politiet.
Endowing the Nonlinear Sigma Model with a Flat Connection Structure: a Way to Renormalization
Creators: name: Ferrari, Ruggero
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss the quantized theory of a pure-gauge non-abelian vector field (flat connection) as it would appear in a mass term a` la Stueckelberg. However the paper is limited to the case where only the flat connection is present (no field strength term). The perturbative solution is constructed by using only the functional equations and by expanding in the number of loops. In particular we do not use a perturbative approach based on the path integral or on a canonical quantization. It is shown that there is no solution with trivial S-matrix. Then the model is embedded in a nonlinear sigma model. The solution is constructed by exploiting a natural hierarchy in the functional equations given by the number of insertions of the flat connection and of the constrained component of the sigma field. The amplitudes with the sigma field are simply derived from those of the flat connection and of the constraint component. Unitarity is enforced by hand by using Feynman rules. We demonstrate the remarkable fact that in generic dimensions the naive Feynman rules yield amplitudes that satisfy the functional equations. This allows a dimensional renormalization of the theory in D=4 by recursive subtractions of the poles in the Laurent expansion. Thus one gets a finite theory depending only on two parameters. The novelty of the paper is the use of the functional equation associated to the local left multiplication introduced by Faddeev and Slavnov, here improved by adding the external source coupled to the constrained component. It gives a powerful tool to renormalize the nonlinear sigma model.
description: 42 pages, 7 figures, Latex; improved presentation of the subtraction procedure
NEW INSIGHTS ON THE ORGANIZATION OF AGRICULTURAL RESEARCH: THEORY AND EVIDENCE FOR WESTERN DEVELOPED COUNTRIES
Creators: name: Huffman, Wallace E.
name: Huffman, Wallace E.
Publisher: name: Unknown
Year: 1999
Subjects: Research and Development/Tech Change/Emerging Technologies

description: Public and private R&D are important sources of advances in knowledge leading to new technologies for and products from agriculture in western developed countries. Over the past fifteen years, a significant reduction in the rate of growth of public funding for agricultural research in western developed countries has occurred relative to the preceding decade. The future, however, holds unexplored options for the organization of public agricultural research. Advances in the theory of impure public goods can be applied to create new financing jurisdictions and funding sources for public agricultural research. Advances in principal-agent theory can be applied to the unique characteristics of the R&D production process, i.e., output is highly uncertain and administrators cannot effectively monitor scientists' effort, to design incentive compatible contracts that significantly improve scientists' attention to effort and quality of research payoffs. Some implications for alternative funding mechanisms are developed. The paper concludes with several new insights about the likely organization of agricultural research in western developed countries for the 21st century.
An Inference and Learning Engine for Spiking Neural Networks in Computational RAM (CRAM)
Creators: name: Cılasun, Hüsrev
name: Resch, Salonik
name: Chowdhury, Zamshed I.
name: Olson, Erin
name: Zabihi, Masoud
name: Zhao, Zhengyang
name: Peterson, Thomas
name: Parhi, Keshab
name: Wang, Jian-Ping
name: Sapatnekar, Sachin S.
name: Karpuzcu, Ulya
Publisher: name: arXiv
Year: 2020
Subjects: subject: Emerging Technologies (cs.ET)
subject: FOS: Computer and information sciences
subject: B.0

description: Spiking Neural Networks (SNN) represent a biologically inspired computation model capable of emulating neural computation in human brain and brain-like structures. The main promise is very low energy consumption. Unfortunately, classic Von Neumann architecture based SNN accelerators often fail to address demanding computation and data transfer requirements efficiently at scale. In this work, we propose a promising alternative, an in-memory SNN accelerator based on Spintronic Computational RAM (CRAM) to overcome scalability limitations, which can reduce the energy consumption by up to 164.1$\times$ when compared to a representative ASIC solution.
Intervju med Løkstad, Rudolf
Creators: name: Krogstad, John Atle
Publisher: name: Unknown
Year: 1975
Subjects: Løkstad, Rudolf

description: Intervju utført av John Atle Krogstad i forbindelse med hans hovedoppgave fra 1975 "Kommunistene i Trøndelag 1936-45: kamp mot krig og fascisme". Biografiske opplysninger. Omhandler blant annet Spania, 17. mai, Finlandskrigen, okkupasjonen, arrestasjoner, illegale aviser, Leo Paltiel.
Completeness of the cubic and quartic Hénon-Heiles Hamiltonians
Creators: name: Conte, Robert
name: Musette, Micheline
name: Verhoeven, Caroline
Publisher: name: arXiv
Year: 2005
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: The quartic Hénon-Heiles Hamiltonian $H = (P_1^2+P_2^2)/2+(Ω_1 Q_1^2+Ω_2 Q_2^2)/2 +C Q_1^4+ B Q_1^2 Q_2^2 + A Q_2^4 +(1/2)(α/Q_1^2+β/Q_2^2) - γQ_1$ passes the Painlevé test for only four sets of values of the constants. Only one of these, identical to the traveling wave reduction of the Manakov system, has been explicitly integrated (Wojciechowski, 1985), while the three others are not yet integrated in the generic case $(α,β,γ)\not=(0,0,0)$. We integrate them by building a birational transformation to two fourth order first degree equations in the classification (Cosgrove, 2000) of such polynomial equations which possess the Painlevé property. This transformation involves the stationary reduction of various partial differential equations (PDEs). The result is the same as for the three cubic Hénon-Heiles Hamiltonians, namely, in all four quartic cases, a general solution which is meromorphic and hyperelliptic with genus two. As a consequence, no additional autonomous term can be added to either the cubic or the quartic Hamiltonians without destroying the Painlevé integrability (completeness property).
description: 10 pages, To appear, Theor.Math.Phys. Gallipoli, 34 June--3 July 2004
Digital watermarking by DCT coefficient manipulation
Creators: name: Sun, Xiaodi
Publisher: name: University of British Columbia
Year: 2009

description: The advent of digital multimedia and worldwide area networks such as the Internet facilitates efficient distribution, reproduction and manipulation over networked information systems. To discourage the unauthorized copying and distributing of electronic documents, new tools are needed for their tracking and copyright enforcement. Digital watermark, which is an invisible mark embedded in a digital medium, for example a serial number or copyright information and can be retrieved even after attacks such as image processing and lossy compression, is one of the most promising ways for this purpose. This thesis is concerned with analyzing and developing several digital watermarking schemes based on manipulating DCT coefficients of images. In the first scheme, a variant of the watermarking scheme proposed by Langelaar, et al. for JPEG/MPEG streams is implemented based on selectively discarding high frequency DCT coefficients. The watermark bits can be recovered by comparing the high frequency energy in difference DCT blocks. The second scheme embeds a watermark into the DCT coefficients of an image during the process of quantization; by introducing a self-reference pattern, the robustness of an watermark can be improved. In the third scheme, pairs of mid-frequency DCT coefficients are selected and modified to embed a watermark. The last scheme is built on the foundation of spread-spectrum communication. After presenting a generic spread spectrum based watermarking scheme, we derive the expectation and variance of the correlation between the investigated image and the watermark, from which the performance of our spread spectrum watermarking algorithm is analyzed and is found to be consistent with the experiment results. The watermarking schemes can detect the embedded watermarks in the DCT domain without the help from the original images. Experiment results show that the embedded watermarks in images can be retrieved successfully even after the JPEG compression and certain other image processing attacks. In addition, our spread spectrum watermarking scheme is capable of embedding multiple watermarks into an image and is robust to cropping attack as well as the JPEG compression with a very low quality factor.
Polygons on a Rotating Fluid Surface
Creators: name: Jansson, Thomas R. N.
name: Haspang, Martin P.
name: Jensen, Kaare H.
name: Hersen, Pascal
name: Bohr, Tomas
Publisher: name: arXiv
Year: 2005
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: We report a novel and spectacular instability of a fluid surface in a rotating system. In a flow driven by rotating the bottom plate of a partially filled, stationary cylindrical container, the shape of the free surface can spontaneously break the axial symmetry and assume the form of a polygon rotating rigidly with a speed different from that of the plate. With water we have observed polygons with up to 6 corners. It has been known for many years that such flows are prone to symmetry breaking, but apparently the polygonal surface shapes have never been observed. The creation of rotating internal waves in a similar setup was observed for much lower rotation rates, where the free surface remains essentially flat. We speculate that the instability is caused by the strong azimuthal shear due to the stationary walls and that it is triggered by minute wobbling of the rotating plate. The slight asymmetry induces a tendency for mode-locking between the plate and the polygon, where the polygon rotates by one corner for each complete rotation of the plate.
AN EXAMINATION OF PROFIT INEFFICIENCY OF RICE FARMERS IN NORTHERN GHANA
Creators: name: Abdulai, Awudu
name: Huffman, Wallace E.
name: Abdulai, Awudu
name: Huffman, Wallace E.
Publisher: name: Unknown
Year: 1998
Subjects: subject: Crop Production/Industries
subject: Africa
subject: Ghana
subject: production efficiency
subject: profit frontier
subject: rice

description: This paper employs a stochastic frontier model to examine profit inefficiency of rice farmers in the Northern Region of Ghana using farm-level survey data. The efficiency index, based on a half-normal distribution of the stochastic error term is related to farm and household characteristics. The empirical results show that farmers' human capital represented by the level of schooling contributes positively to production efficiency, suggesting that investment in farmers' education improves their allocative performance. Access to credit and greater specialization in rice production, are found to be positively related to production efficiency. A farmer's participation in nonfarm employment and being older, however, reduce production efficiency. Farmers located in areas with better facilities like extension services and agricultural input delivery systems also tend to exhibit greater production efficiency.
Proposal on Application of the Multi-Wire Proportional Chambers of the LHCb MUON Detector at Very High Rates for the Future Upgrades
Creators: name: Bondar, N.
name: Ilin, D.
name: Maev, O.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The MUON Detector (MD) of LHCb is one of the largest instruments of this kind worldwide, and one of the most irradiated. It has performed exceptionally well during the RUN1 and RUN2 of the LHC at an instantaneous luminosity of 4$\times$10$^{32}$ cm$^{-2}$s$^{-1}$, with tracking inefficiencies at the level of 1$\%$ and 2.6$\%$, respectively. Looking forward for the future LHCb Upgrade 2 (U2) planned in 2031 and aiming in running the detector at increased luminosity by a factor $\sim$50, and at the same time keeping a very high ($\sim$99$\%$) detection efficiency, an option with reuse significant part of the present Multi-Wire Proportional Chambers (MWPC) in a new Muon System is presented. In addition, the first idea of new Front End Electronics (FEE) and an existing test setup applicable for designing both: new MWPCs with a higher granularity of the cathode readout pads and new FEE are described.
Intervju med Moe, Alf
Creators: name: Krogstad, John Atle
Publisher: name: Unknown
Year: 1975
Subjects: Moe, Alf

description: Intervju utført av John Atle Krogstad i forbindelse med hans hovedoppgave fra 1975 "Kommunistene i Trøndelag 1936-45: kamp mot krig og fascisme". Omhandler blant annet politisk tilhørighet, idrett (Lyn, Ørnulf), Reidar Wærdahl, motstandskamp, Thingstadgruppa, studiesirkler, flukt. Biografiske opplysninger.