cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Cosmic-ray upscattered inelastic dark matter
Creators: name: Bell, Nicole F.
name: Dent, James B.
name: Dutta, Bhaskar
name: Ghosh, Sumit
name: Kumar, Jason
name: Newstead, Jayden L.
name: Shoemaker, Ian M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Light non-relativistic components of the galactic dark matter halo elude direct detection constraints because they lack the kinetic energy to create an observable recoil. However, cosmic-rays can upscatter dark matter to significant energies, giving direct detection experiments access to previously unreachable regions of parameter-space at very low dark matter mass. In this work we extend the cosmic-ray dark matter formalism to models of inelastic dark matter and show that previously inaccessible regions of the mass-splitting parameter space can be probed. Conventional direct detection of non-relativistic halo dark matter is limited to mass splittings of $δ\sim10~\mathrm{keV}$ and is highly mass dependent. We find that including the effect of cosmic-ray upscattering can extend the reach to mass splittings of $δ\sim100~\mathrm{MeV}$ and maintain that reach at much lower dark matter mass.
description: 9 pages, 6 figures
S-wave γγ\to ππand f_0(980)\to ππ
Creators: name: Oller, J. A.
name: Roca, L.
name: Schat, C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We report on a dispersion relation for the γγ\to (ππ)_I S-wave in isospin I emphasizing the low energy region. The f_0(980) signal that emerges in γγ\to ππis also discussed. Our results could be used to distinguish between different ππisoscalar S-wave parameterizations. We also calculate the width of the σresonance to γγand obtain the value Γ(σ\toγγ)=(1.68\pm 0.15) KeV. Finally, we elaborate on the size of the f_0(980) coupling to ππand show that its smallness compared to the K\bar{K} one is not related to the OZI rule.
description: 6 pages, 1 figure. Prepared for the Workshop on Scalar Mesons and Related Topics, Lisbon, 11-16 Feburary 2008
Eutacticity in sea urchin evolution
Creators: name: López-Sauceda, J.
name: Aragón, J. L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences

description: An eutactic star, in a n-dimensional space, is a set of N vectors which can be viewed as the projection of N orthogonal vectors in a N-dimensional space. By adequately associating a star of vectors to a particular sea urchin we propose that a measure of the eutacticity of the star constitutes a measure of the regularity of the sea urchin. Then we study changes of regularity (eutacticity) in a macroevolutive and taxonomic level of sea urchins belonging to the Echinoidea Class. An analysis considering changes through geological time suggests a high degree of regularity in the shape of these organisms through their evolution. Rare deviations from regularity measured in Holasteroida order are discussed.
description: 17 pages, 6 figures
ความแปรปรวนทางพันธุกรรมในประชากรปลายี่สกเทศของไทยที่มาจากการเพาะเลี้ยง ปรับปรุงพันธุ์ และแหล่งน้ำธรรมชาติ
Creators: name: Panom Krachangpoj Sodsuk
Publisher: name: Genetics Society of Thailand
Year: 2013
Subjects: Rohu (Labeo rohita), genetic variation, microsatellite

description: 2, 6, Thai Journal of Genetics
การตรวจสอบความหอมในเชื้อพันธุกรรมข้าวไร่ไทยโดยใช้เครื่องหมายดีเอ็นเอ ที่จำเพาะต่อยีน Os2AP และการวิเคราะห์คุณภาพหุงต้มและความหนาแน่นของธาตุเหล็กในเมล็ด
Creators: name: ไวพจน์ กันจู
name: สุกัญญา เรืองขำ
name: สุมน ห้อยมาลา
name: อนุชา พลับพลา
name: อภิชาติ วรรณวิจิตร
name: ธีรยุทธ ตู้จินดา
Publisher: name: Genetics Society of Thailand
Year: 2013
Subjects: aroma, upland rice, DNA marker,Os2AP gene, amylose content, iron

description: 1, 6, Thai Journal of Genetics
Hirota-Kimura Type Discretization of the Classical Nonholonomic Suslov Problem
Creators: name: Dragovic, Vladimir
name: Gajic, Borislav
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: Dynamical Systems (math.DS)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 37J60, 70H06

description: We constructed Hirota-Kimura type discretization of the classical nonholonomic Suslov problem of motion of rigid body fixed at a point. We found a first integral proving integrability. Also, we have shown that discrete trajectories asymptotically tend to a line of discrete analogies of so-called steady-state rotations. The last property completely corresponds to well-known property of the continuous Suslov case. The explicite formulae for solutions are given. In n-dimensional case we give discrete equations.
description: 10 pages, 4 pictures
Quantum entanglement, fair sampling, and reality: Is the moon there when nobody looks?
Creators: name: Adenier, Guillaume
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In 1981, David Mermin described a cleverly simplified version of Bell's theorem. It pointed out in a straightforward way that interpreting entanglement from a local realist point of view can be problematic. I propose here an extended version of Mermin's device that can actually be given a simple local realist interpretation through a sample selection bias, and I argue that we still have no scientific reason to believe that the moon could possibly not be there when nobody looks.
description: 13 pages, 8 Figures, 1 Table
A Thousand Invisible Cords Binding Astronomy and High-Energy Physics
Creators: name: Kolb, Rocky
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The traditional realm of astronomy is the observation and study of the largest objects in the Universe, while the traditional domain of high-energy physics is the study of the smallest things in nature. But these two sciences concerned with opposite ends of the size spectrum are, in Muir's words, bound fast by a thousand invisible cords that cannot be broken. In this essay I propose that collaborations of astronomers and high-energy physicists on common problems are beneficial for both fields, and that both astronomy and high-energy physics can advance by this close and still growing relationship. Dark matter and dark energy are two of the binding cords I will use to illustrate how collaborations of astronomers and high-energy physicists on large astronomical projects can be good for astronomy, and how discoveries in astronomy can guide high-energy physicists in their quest for understanding nature on the smallest scales. Of course, the fields have some different intellectual and collaborative traditions, neither of which is ideal. The cultures of the different fields cannot be judged to be right or wrong; they either work or they don't. When astronomers and high-energy physicists work together, the binding cords can either encourage or choke creativity. The challenge facing the astronomy and high-energy physics communities is to adopt the best traditions of both fields. It is up to us to choose wisely.
description: Why "Fundamentalist" Physics Is Good for Astronomy (in response to the paper of Simon White, arXiv:0704.2291)
Emittance fluctuation of mesoscopic conductors in the presence of disorders
Creators: name: Ren, Wei
name: Xu, Fuming
name: Wang, Jian
Publisher: name: arXiv
Year: 2008
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We report the investigation of the dynamic conductance fluctuation of disordered mesoscopic conductors including 1D, 2D and quantum dot systems. Our numerical results show that in the quasi-ballistic regime the average emittance is negative indicating the expected inductive-like behavior. However, in the diffusive and localized regime, the average emittance is still negative. This disagrees qualitatively with the result obtained from the random matrix theory. Our analysis suggests that this counter-intuitive result is due to the appearance of non-diffusive elements in the system, the necklace states (or the precursor of necklace states in the diffusive regime) whose existence has been confirmed experimentally in an optical system.
Grain Physics and Rosseland Mean Opacities
Creators: name: Ferguson, Jason W.
name: Heffner-Wong, Amanda S.
name: Penley, Jonathan J.
name: Barman, Travis S.
name: Alexander, David R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Tables of mean opacities are often used to compute the transfer of radiation in a variety of astrophysical simulations from stellar evolution models to proto-planetary disks. Often tables, such as Ferguson et al. (2005), are computed with a predetermined set of physical assumptions that may or may not be valid for a specific application. This paper explores the effects of several assumptions of grain physics on the Rosseland mean opacity in an oxygen rich environment. We find that changing the distribution of grain sizes, either the power-law exponent or the shape of the distribution, has a marginal effect on the total mean opacity. We also explore the difference in the mean opacity between solid homogenous grains and grains that are porous or conglomorations of several species. Changing the amount of grain opacity included in the mean by assuming a grain-to-gas ratio significantly affects the mean opacity, but in a predictable way.
description: 19 pages, 6 figures, accepted for publication in ApJ
Spiriferida Waagen 1883
Creators: name: Doweld, Alexander B.
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Brachiopoda
Rhynchonellata
Spiriferida

description: Order Spiriferida Waagen 1883    Genus Rukavischnikovia gen. nov. (= Iliella Rukavischnikova non Tschernyschev, 1940) Type species.  Rukavischnikovia minima (Rukavischnikova) comb. nov. (= Iliella minima Rukavischnikova in Nikitin & al., 1980: 72, tab. 21, figs 12-18, 23, text-fig. 10). Holotype: 257/11678 [Central Scientific-Research Geological Exploration Museum after S. N. Chernyshev (CNIGRMuseum), S.-Petersburg, Russian Federation]. Stratum typicum: Upper Ordovician (Katian = Chokparian horizon). Locus typicus: Oysu creek, Anzhar river, Dulankara mountains, Southern Kazakhstan.
 Diagnosis. See Rukavschnikova (in Nikitin et al., 1980: 72).
 Remarks. It should be noted that this brachiopod genus was inadvertently omitted from the revised Brachiopod Treatise.
description: Published as part of Doweld, Alexander B., 2015, Rukavisсhnikovia, a new replacement name for preoccupied Iliella Rukavishnikova, 1980 (Brachiopoda) non Tschernyshev, 1940 (Crustacea), pp. 478 in Zootaxa 4052 (4) on page 478, DOI: 10.11646/zootaxa.4052.4.5, http://zenodo.org/record/244576
Ultimate-state scaling in a shell model for homogeneous turbulent convection
Creators: name: Ching, Emily S. C.
name: Ko, T. C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: An interesting question in turbulent convection is how the heat transport depends on the strength of thermal forcing in the limit of very large thermal forcing. Kraichnan predicted [Phys. Fluids {\bf 5}, 1374 (1962)] that the heat transport measured by the Nusselt number (Nu) would depend on the strength of thermal forcing measured by the Rayleigh number (Ra) as Nu $\sim$ Ra$^{1/2}$ with possible logarithmic corrections at very high Ra. This scaling behavior is taken as a signature of the so-called ultimate state of turbulent convection. The ultimate state was interpreted in the Grossmann-Lohse (GL) theory [J. Fluid Mech. {\bf 407}, 27 (2000)] as a bulk-dominated state in which both the kinetic and thermal dissipation are dominated by contributions from the bulk of the flow with the boundary layers either broken down or playing no role in the heat transport. In this paper, we study the dependence of Nu and the Reynolds number (Re) measuring the root-mean-squared velocity fluctuations on Ra and the Prandtl number (Pr) using a shell model for homogeneous turbulent convection where buoyancy is acting directly on most of the scales. We find that Nu$\sim$ Ra$^{1/2}$Pr$^{1/2}$ and Re$\sim$ Ra$^{1/2}$Pr$^{-1/2}$, which resemble the ultimate-state scaling behavior for fluids with moderate Pr, but the presence of a drag acting on the large scales is crucial in giving rise to such scaling. This suggests that if buoyancy acts on most of the scales in the bulk of turbulent convection at very high Ra, then the ultimate state cannot be a bulk-dominated state.
A layout generator for stray insensitive switched capacitor filters
Creators: name: Lindholm, John Erik
Publisher: name: University of British Columbia
Year: 2010

description: Two software programs have been developed to automatically generate the layout of stray insensitive switched capacitor filters. The first program, CIRCE, uses a SWITCAP filter description to generate an intermediate format filter description that is suitable for direct layout. It groups the filter elements into integrators and then sorts these integrators and their elements. The SWITCAP description can be with or without switch-sharing. The second program, SISCL, lays out the filter in CIF format using a double-polysilicon ISOCMOS process. The layout is done with a capacitor array placed over the switches and the standard-cell operational amplifiers placed beneath the switches. The layout is done with full switch-sharing. Capacitors may be rearranged in the intermediate file to produce better layouts. The software' is written in the C language.
$η$ and $η'$ mesons in the Dyson-Schwinger approach at finite temperature
Creators: name: Horvatic, D.
name: Klabucar, D.
name: Radzhabov, A. E.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the temperature dependence of the pseudoscalar meson properties in a relativistic bound-state approach exhibiting the chiral behavior mandated by QCD. Concretely, we adopt the Dyson-Schwinger approach with a rank-2 separable model interaction. After extending the model to the strange sector and fixing its parameters at zero temperature, T=0, we study the T-dependence of the masses and decay constants of all ground-state mesons in the pseudoscalar nonet. Of chief interest are $η$ and $η^\prime$. The influence of the QCD axial anomaly on them is successfully obtained through the Witten-Veneziano relation at T=0. The same approach is then extended to T>0, using lattice QCD results for the topological susceptibility. The most conspicuous finding is an increase of the $η^\prime$ mass around the chiral restoration temperature $T_{\rm Ch}$, which would suggest a suppression of $η^\prime$ production in relativistic heavy-ion collisions. The increase of the $η^\prime$ mass may also indicate that the extension of the Witten-Veneziano relation to finite temperatures becomes unreliable around and above $T_{\rm Ch}$. Possibilities of an improved treatment are discussed.
description: 13 pages, 15 figures
The holding company concept applied to multiple automobile dealerships
Creators: name: Gunn, Henry Guynn
Publisher: name: The University of Texas at Austin
Year: 1976
Subjects: subject: Automobile dealers--United States
subject: Automobile showrooms--United States
subject: Holding companies--United States

description: Ownership and operation of more than one automobile dealership and the resulting possible financial rewards have been made difficult to attain in recent years. This difficulty has been especially harmful to those dealers in areas of population which are considerably less dense than the metropolitan areas. These smaller dealers cannot amass the large sales and profit potential available to the dealers in the metropolitan areas. It can then be to their benefit to develop some arrangement in which they can circumvent the problems and obstacles which have arisen to block a multiple dealership operation. This report will deal with these problems and suggest a possible solution to them. The situation dealt with will be limited to a small business application. It will be pointed toward the ownership of several dealerships which would not be located in metropolitan areas. Further it will be limited to General Motors Corporation dealerships although it could be applied to others. The problems which will be covered include those requirements and regulations imposed by General Motors and those problems which particularly affect the small business entity
INTERACCIONES DE LA CADENA C34 EN EL ESTADO DE FUSIÓN ACTIVO DE LA gp41 DEL VIH-1
Creators: name: Martinez-Seara, Hector
Publisher: name: Zenodo
Year: 2019
Subjects: GP41, HIV

description: Material Master en quinica experimental

Universiad de Barcelona

Departamento de quimica fisica

Autor: Hector Martinez-Seara Monne

Date: 30 de junio de 2004

Director: Dr. Jaime Rubio Martínez
Neutron photocrystallography: simulation and experiment
Creators: name: Schefer, J.
name: Schaniel, D.
name: Petricek, V.
name: Woike, Th.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The investigation of light-induced structural changes by diffractive methods has improved much in the last two decades. We present here the case of neutron photocrystallography for which we have built a special experimental setup at the single crystal neutron diffractometer TriCS at the Swiss Spallation Neutron Source SINQ. We illustrate the progress of the method on the example of the structural determination of photoinduced nitrosyl linkage-isomers in Na2[Fe(CN)5NO] 2H2O. The in-situ determination of the population of the light-induced linkage isomers by optical transmission measurements enhances the reliability of such structural investigations considerably. Additionally we present a new simulation tool within the program package JANA2006 which allows to plan a photocrystallographic experiment thoroughly since the required q-range, the minimally needed population of the photoinduced species, as well as the necessary counting statistics for a successful single crystal diffraction experiment can be evaluated in advance.
Web scraping with Excel and Google Sheets
Creators: name: Lee, Yoo Young
Publisher: name: Zenodo
Year: 2021
Subjects: Web scraping
Excel
Google Sheets

description: The Web has become a source of data for daily and scientific research. Although there are many initiatives to facilitate data exchange, most of the Web content are written in plain HTML. This workshop will introduce web scraping of scrape web data into Excel and Google Sheet and how these techniques can be applied to daily work and research.
Accumulation of chromium metastable atoms into an Optical Trap
Creators: name: Chicireanu, R.
name: Beaufils, Q.
name: Pouderous, A.
name: Laburthe-Tolra, B.
name: Marechal, E.
name: Vernac, L.
name: Keller, J. -C.
name: Gorceix, O.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We report the fast accumulation of a large number of metastable 52Cr atoms in a mixed trap, formed by the superposition of a strongly confining optical trap and a quadrupolar magnetic trap. The steady state is reached after about 400 ms, providing a cloud of more than one million metastable atoms at a temperature of about 100 microK, with a peak density of 10^{18} atoms.m^{-3}. We have optimized the loading procedure, and measured the light shift of the 5D4 state by analyzing how the trapped atoms respond to a parametric excitation. We compare this result to a theoretical evaluation based on the available spectroscopic data for chromium atoms.
description: 7 pages, 5 Figures
Absence of magnetic ordering in NiGa_2S_4
Creators: name: Mazin, I. I.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Triangular-layered NiGa2S4, contrary to intuitive expectation, does not form a noncollinear antiferromagnetic structure, as do isoelectronic NaCrO2 and LiCrO2. Instead, the local magnetic moments remain disordered down to the lowest measured temperature. To get more insight into this phenomenon, we have performed first principles calculations of the first, second end third neighbors exchange interactions, and found that the second neighbor exchange is negligible, while the first and the third neighbor exchanges are comparable and antiferromagnetic. Both are rapidly suppressed by the on-site Hubbard repulsion.
description: 4 pages, 4 figures
Dynamical black hole in a bouncing universe
Creators: name: Pérez, Daniela
name: Bergliaffa, Santiago E. Perez
name: Romero, Gustavo E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We analyze the causal structure of McVittie spacetime for a classical bouncing cosmological model. In particular, we compute the trapping horizons of the metric and integrate the trajectories of radial null geodesics before, during, and after the bounce takes place. In the contracting phase up to the occurrence of the bounce, a dynamical black hole is present. When the universe reaches a certain minimum scale, the trapping horizons disappear and the black hole ceases to exist. After the bounce, the central weak singularity becomes naked. In the expanding phase, for large positive values of the cosmic time, the behaviour of null geodesics indicates that the solution contains a black hole. These results suggest that neither a contracting nor an expanding universe can accommodate a black hole at all times.
description: 13 pages, 19 figures, accepted for publication in Physical Review D
Electric-Field Induced Phase Transitions in Capillary Electrophoretic Systems
Creators: name: Kaygusuz, Hakan
name: Erim, F. Bedia
name: Berker, A. Nihat
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The movement of the particles in a capillary electrophoretic system under electroosmotic flow was modeled using Monte Carlo simulation with Metropolis algorithm. Two different cases, with repulsive and attractive interactions between molecules were taken into consideration. The simulation was done using a spin-like system where the interactions between the nearest and second closest neighbors were considered in two separate steps of the modeling study. A total of 20 different cases with different rate of interactions for both repulsive and attractive interactions were modeled. The movement of the particles through the capillary is defined as current. At a low interaction level between molecules, a regular electroosmotic flow is obtained, on the other hand, with increasing interactions between molecules the current shows a phase transition behavior. The results also show that a modular electroosmotic flow can be obtained for separations by tuning the ratio between molecular interactions and electric field strength.
description: 8 pages, 4 figures
Rate-Splitting Multiple Access for Joint Radar-Communications with Low-Resolution DACs
Creators: name: Dizdar, Onur
name: Kaushik, Aryan
name: Clerckx, Bruno
name: Masouros, Christos
Publisher: name: arXiv
Year: 2021
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In this paper, we introduce the design of a multi-antenna Joint Radar-Communication (JRC) system with Rate Splitting Multiple Access (RSMA) and low resolution Digital-to-Analog Converter (DAC) units. Using RSMA, the communication messages are split into private and common parts, then precoded and quantized before transmission. We use a problem formulation to design the JRC system with RSMA and low resolution DACs by maximizing communication sum-rate and the proximity of the resulting JRC waveform to an optimal radar beampattern under an average transmit power constraint. We solve the joint sum-rate maximization and beampattern error minimization problem using Alternating Direction Method of Multipliers (ADMM) method. The numerical results show that RSMA achieves a significantly higher sum-rate compared to Space Division Multiple Access (SDMA) while providing the same Normalized Mean Square Error (NMSE) for the designed radar beampattern.
Experimental investigation of fishing vessel stability in a transverse seaway
Creators: name: Rohling, Gerald Francis
Publisher: name: University of British Columbia
Year: 2010

description: The continuing loss of life at sea due to the capsizing of fishing vessels in inclement weather requires the research and design communities to continue their search to find methods for the prevention of further occurances. As part of this investigative process this thesis was prepared. To gain an initial foothold on the dynamics of capsizing the area of transverse seaways was considered for its contribution to capsizing through the impact of breaking waves on the side of the ship. Two model fishing vessels, built without bulwarks or superstructure, were prepared for testing in a 220 foot test basin where, through the use of computer control, a repeatable sea environment could be created. The models were equipped with adjustable displacements and centers of gravity to allow testing of IMO stability guidelines and the simulation of wind induced decreases in general stability. Tests were conducted in still water, regular waves and breaking waves of the plunging jet type. Motions, including roll, pitch, heave, sway and yaw, were measured and stored on media for analysis by computer. Along with the electronic monitoring of the vessel's motions a video tape was made of the tests to allow visual verification of motions at a later date. From the results of the tests it was found that the single chine seiner exhibited greater intact stability in all transverse sea conditions tested than did the west coast trawler. Under no circumstance did the single chine seiner capsize while, in breaking waves, the trawler exhibited repeated capsizing behaviour when at its heaviest displacement and lowest metacentric height. This capsizing illustrates the need for greater stability characterisitics and improved safety criterion for breaking waves survival over that required in regular seas.
Hans Jonas: la bioetica come problema di storia della filosofia
Creators: name: Del Giudice, Armando
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2006

description: Il lavoro svolto affronta in modo sistematico la parabola intellettuale del filosofo tedesco Hans Jonas, dimostrando come il suo passaggio alla bioetica sia determinato dalla necessità teoretica, oltre che morale, di risolvere il problema del nichilismo moderno.  Un problema che trova una fortissima eco nell’antica fede gnostica, e che si configura essenzialmente come smarrimento del senso della sacralità dell’ordine della creazione. Impegnandosi, a sua volta, nella riformulazione dell’ontologia, Jonas giunge a reintegrare la metafisica da cui derivare un’etica giusnaturalistica. Tenuto conto però di come la metafisica ed il giusnaturalismo mal riescono a fronteggiare – teoreticamente e soprattutto politicamente – le sollecitazioni del pluralismo della cultura e della società moderne, e di quali derive fondamentaliste possono annidarsi dietro di esso, la tesi discussa conclude con una critica del giusontologismo jonasiano (e implicitamente con il giusontologismo tout court).
La tesi è corredata di una corposa bibliografia di e su Jonas
Generic Continuous Spectrum for Ergodic Schr"odinger Operators
Creators: name: Boshernitzan, Michael
name: Damanik, David
Publisher: name: arXiv
Year: 2007
Subjects: subject: Spectral Theory (math.SP)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: We consider discrete Schr"odinger operators on the line with potentials generated by a minimal homeomorphism on a compact metric space and a continuous sampling function. We introduce the concepts of topological and metric repetition property. Assuming that the underlying dynamical system satisfies one of these repetition properties, we show using Gordon's Lemma that for a generic continuous sampling function, the associated Schr"odinger operators have no eigenvalues in a topological or metric sense, respectively. We present a number of applications, particularly to shifts and skew-shifts on the torus.
description: 14 pages
Thermal state of the intergalactic medium near to the optical limit for the Ly-$α$ forest
Creators: name: Ondro, Tomáš
name: Gális, Rudolf
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In this article, the temperature-density relation of the intergalactic medium was studied in the region $1.6 \leq z < 2.0$ divided into two bins. For this purpose, the Ly-$α$ forest decomposition into individual absorption profiles was used for the study of 35 publicly available quasar spectra obtained by the Ultraviolet and Visual Echelle Spectrograph (UVES) on the Very Large Telescope (ESO) and by the High Resolution Echelle Spectrometer (HIRES) on the Keck Telescope. For the determination of the thermal state sensitive cut-off position in the $b - N_{HI}$ distribution, the iterative fitting procedure was adopted. The measurements were calibrated using mock Ly-$α$ forest data generated by 23 hydrodynamical simulations with different thermal histories. The value of the temperature at mean density corresponds to the decreasing trend predicted by various models at the lower redshifts. In the case of power law index, determined values are close to 1.6, which is expected after all reionization events in various models assuming the balance of photoheating with adiabatic cooling.
The s-wave charmed baryon resonances from a coupled-channel approach with heavy quark symmetry
Creators: name: Garcia-Recio, C.
name: Magas, V. K.
name: Mizutani, T.
name: Nieves, J.
name: Ramos, A.
name: Salcedo, L. L.
name: Tolos, L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study charmed baryon resonances which are generated dynamically within a unitary meson-baryon coupled channel model that treats the heavy pseudoscalar and vector mesons on equal footing as required by heavy-quark symmetry. It is an extension of recent SU(4) models with t-channel vector meson exchanges to a SU(8) spin-flavor scheme, but differs considerably from the SU(4) approach in how the strong breaking of the flavor symmetry is implemented. Some of our dynamically generated states can be readily assigned to recently observed baryon resonances, while others do not have a straightforward identification and require the compilation of more data as well as an extension of the model to d-wave meson-baryon interactions and p-wave coupling in the neglected s- and u-channel diagrams. Of several novelties, we find that the Lambda_c(2595), which emerged as a ND quasi-bound state within the SU(4) approaches, becomes predominantly a ND* quasi-bound state in the present SU(8) scheme.
description: 37 pages, 7 figures. Some parameters of the model have been changed, more channels are considered. To appear in PRD
Cloning, expression and characterization
of P2-glucose-6P dehydrogenase from barley (Hordeum vulgare) and  poplar (Populus trichocarpa.

Effects of Abscissic acid (ABA) on activity, occurrence and expression of different isoforms of glucose-6P dehydrogenase in barley
Creators: name: Cardi, Manuela
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2010

description: Glucose 6-phosphate dehydrogenase (G6PDH, EC 1.1.1.49) is the main regulatory enzyme of the oxidative pentose phosphate pathway (OPPP), an important provider of NADPH. The effect of exogenous ABA on the activity, expression level and protein amount of different G6PDH isoforms has been studied in barley plants. G6PDH activity increased by 50% in ABA treated roots for 12h; this increase resembles a similar (+35%) effect observed in P2-G6PDH transcript levels .The transcript Cy-G6PDH levels did not change appreciably upon ABA supply. Similar variations were observed in protein levels in immunoblotting analyses. In leaves, ABA did not affect the cytosolic protein levels, while a sudden decrease was observed for chloroplastic P1-G6PDH protein; therefore the two-fold increase in G6PDH activity observed after ABA treatment is likely related to an increase in mRNA level (+ 50%) and protein amount (+ 85%) of  leaf P2-G6PDH. Altogether, these results suggest a specific role for the plastidial P2-isoform in ABA treated barley plants, encouraging a better characterization of this plastidic isoform.
Therefore, genes of the plastidic isoform of G6PDH (P2-G6PDH) from two different organisms, barley (Hordeum vulgare) and poplar (Populus trichocarpa) have been cloned in two different expression vectors, pET3d and pET15b (His-Tag), and overexpressed in E.coli. The purified enzyme was checked by mass spectrometry analysis,  and for the reactivity against specific P2—G6PDH antibodies; the main kinetic parameters, and differential sensitivity to reduction by DTT were determined.The recombinant P2-G6PDHs exhibits molecular weights of 55.5 kDa and 61kDa for barley and poplar, respectively. The main kinetic parameters measured for both HvP2-G6DPH and PtP2G6PDH are in agreement (e.g. high KiNADPH) with the values known for the most of other P2-type G6PDHs. The recombinant barley protein is moderately sensitive to reductants (DTT); moreover the Populus trichocarpa enzyme presents a redox potential (-280 mV) favourable for control by either thioredoxins m or f.
FIRESTARTER 2: Dynamic Code Generation for Processor Stress Tests
Creators: name: Schöne, Robert
name: Schmidl, Markus
name: Bielert, Mario
name: Hackenberg, Daniel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Performance (cs.PF)
subject: FOS: Computer and information sciences

description: Processor stress tests target to maximize processor power consumption by executing highly demanding workloads. They are typically used to test the cooling and electrical infrastructure of compute nodes or larger systems in labs or data centers. While multiple of these tools already exists, they have to be re-evaluated and updated regularly to match the developments in computer architecture. This paper presents the first major update of FIRESTARTER, an Open Source tool specifically designed to create near-peak power consumption. The main new features concern the online generation of workloads and automatic self-tuning for specific hardware configurations. We further apply these new features on an AMD Rome system and demonstrate the optimization process. Our analysis shows how accesses to the different levels of the memory hierarchy contribute to the overall power consumption. Finally, we demonstrate how the auto-tuning algorithm can cope with different processor configurations and how these influence the effectiveness of the created workload.
description: supported in part by the German Research Foundation (DFG) within the CRC 912 - HAEC
Strobe checklist for the article entitled: Retrospective analysis of the use of osteoporosis medication at the presentation of non-vertebral fragility fractures in a predominantly Hispanic population.
Creators: name: Torres-Reveron, Annelyn
Publisher: name: Zenodo
Year: 2021
Subjects: osteoporosis; reporting guidelines

description: This is a STROBE checklist for an article entitled: Retrospective analysis of the use of osteoporosis medication at the presentation of non-vertebral fragility fractures in a predominantly Hispanic population. The article was submitted for publication to F1000Research.
Distortion correction of two-component - two-dimensional PIV using a large imaging sensor with application to measurements of a turbulent boundary layer flow at $Re_τ = 2386$
Creators: name: Sun, Bihai
name: Shehzad, Muhammad
name: Jovic, Daniel
name: Cuvier, Christophe
name: Willert, Christian
name: Ostovan, Yasar
name: Foucaut, Jean-Marc
name: Atkinson, Callum
name: Soria, Julio
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: In the past decade, advances in electronics technology have made larger imaging sensors available to the experimental fluid mechanics community. These advancements have enabled the measurement of 2-component 2-dimensional (2C-2D) velocity fields using particle image velocimetry (PIV) with much higher spatial resolution than previously possible. However, due to the large size of the sensor, the lens distortion needs to be taken into account as it will now have a more significant effect on the measurement quality that must be corrected to ensure accurate high-fidelity 2C-2D velocity field measurements. In this paper, two dewarping models, a second-order rational function (R2) and a bicubic polynomial (P3) are investigated with regards to 2C-2D PIV measurements of a turbulent boundary layer (TBL) using a large imaging sensor. Two approaches are considered and compared: (i) dewarping the images prior to the PIV cross-correlation analysis and (ii) undertaking the PIV cross-correlation analysis using the original recorded distorted images then followed by using the mapping functions derived for image dewarping to provide the correct spatial location of the velocity measurement point. The results demonstrate that the use of P3 dewarping model to correct lens distortion yields better results than the R2 dewarping model. Furthermore, both approaches for the P3 dewarping model yield results which are statistically indistinguishable.
Energy Efficiency Aspects of the AMD Zen 2 Architecture
Creators: name: Schöne, Robert
name: Ilsche, Thomas
name: Bielert, Mario
name: Velten, Markus
name: Schmidl, Markus
name: Hackenberg, Daniel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Hardware Architecture (cs.AR)
subject: FOS: Computer and information sciences

description: In High Performance Computing, systems are evaluated based on their computational throughput. However, performance in contemporary server processors is primarily limited by power and thermal constraints. Ensuring operation within a given power envelope requires a wide range of sophisticated control mechanisms. While some of these are handled transparently by hardware control loops, others are controlled by the operating system. A lack of publicly disclosed implementation details further complicates this topic. However, understanding these mechanisms is a prerequisite for any effort to exploit the full computing capability and to minimize the energy consumption of today's server systems. This paper highlights the various energy efficiency aspects of the AMD Zen 2 microarchitecture to facilitate system understanding and optimization. Key findings include qualitative and quantitative descriptions regarding core frequency transition delays, workload-based frequency limitations, effects of I/O die P-states on memory performance as well as discussion on the built-in power monitoring capabilities and its limitations. Moreover, we present specifics and caveats of idle states, wakeup times as well as the impact of idling and inactive hardware threads and cores on the performance of active resources such as other cores.
description: supported in part by the German Research Foundation (DFG) within the CRC 912 - HAEC
Unusual heavy-mass nearly ferromagnetic state with a surprisingly large Wilson ratio in the double layered ruthenates (Sr$_{1-x}$Ca$_{x}$)$_{3}$Ru$_{2}$O$_{7}$
Creators: name: Qu, Zhe
name: Spinu, Leonard
name: Yuan, Huiqiu
name: Dobrosavljevic, Vladimir
name: Bao, Wei
name: Lynn, Jeffrey W.
name: Nicklas, M.
name: Peng, Jin
name: Liu, Tijiang
name: Fobes, David
name: Flesch, Etienne
name: Mao, Z. Q.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report an unusual nearly ferromagnetic, heavy-mass state with a surprisingly large Wilson ratio $R_{\textrm{w}}$ (e.g., $R_{\textrm{w}}\sim$ 700 for $x =$ 0.2) in double layered ruthenates (Sr$_{1-x}$Ca$_{x}$)$_{3}$Ru$_{2}$O$_{7}$ with 0.08 $< x
description: 4 pages, 4 figures; to be published in Physical Review B Rapid Communication; solve the problem with Fig.1
First time-series optical photometry from Antarctica
Creators: name: Strassmeier, K. G.
name: Briguglio, R.
name: Granzer, T.
name: Tosti, G.
name: DiVarano, I.
name: Savanov, I.
name: Bagaglia, M.
name: Castellini, S.
name: Mancini, A.
name: Nucciarelli, G.
name: Straniero, O.
name: Distefano, E.
name: Messina, S.
name: Cutispoto, G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Beating the Earth's day-night cycle is mandatory for long and continuous time-series photometry and had been achieved with either large ground-based networks of observatories at different geographic longitudes or when conducted from space. A third possibility is offered by a polar location with astronomically-qualified site characteristics. Aims. In this paper, we present the first scientific stellar time-series optical photometry from Dome C in Antarctica and analyze approximately 13,000 CCD frames taken in July 2007. We conclude that high-precision CCD photometry with exceptional time coverage and cadence can be obtained at Dome C in Antarctica and be successfully used for time-series astrophysics.
description: accepted for A&A
Flow in an hourglass: particle friction and stiffness matter
Creators: name: Pongó, Tivadar
name: Stiga, Viktória
name: Török, János
name: Lévay, Sára
name: Szabó, Balázs
name: Stannarius, Ralf
name: Hidalgo, Raúl Cruz
name: Börzsönyi, Tamás
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Granular flow out of a silo is studied experimentally and numerically. The time evolution of the discharge rate as well as the normal force (apparent weight) at the bottom of the container is monitored. We show, that particle stiffness has a strong effect on the qualitative features of silo discharge. For deformable grains with a Young's modulus of about $Y_m\approx 40$ kPa in a silo with basal pressure of the order of 4 kPa lowering the friction coefficient leads to a gradual change in the discharge curve: the flow rate becomes filling height dependent, it decreases during the discharge process. For hard grains with a Young's modulus of about $Y_m\approx 500$ MPa the flow rate is much less sensitive to the value of the friction coefficient. Using DEM data combined with a coarse-graining methodology allows us to compute all the relevant macroscopic fields, namely, linear momentum, density and stress tensors. The observed difference in the discharge in the low friction limit is connected to a strong difference in the pressure field: while for hard grains Janssen-screening is effective, leading to high vertical stress near the silo wall and small pressure above the orifice region, for deformable grains the pressure above the orifice is larger and gradually decreases during the discharge process. We have analyzed the momentum balance in the region of the orifice (near the location of the outlet) for the case of soft particles with low friction coefficient, and proposed a phenomenological formulation that predicts the linear decrease of the flow rate with decreasing filling height.
description: 17 pages, 10 figures
Water Control in Cut Stems of Rose and Carnation
Creators: name: Di Stasio, Emilio
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2010

description: This PhD Thesis address, on cut flowers vase life, physiological mechanisms aimed at maintaining and regulating tissues hydration, cellular turgor, water use and senescence phenomena. Specifically we considered the effect of compatible solutes (osmoregulation) on water status, hydration state and vase life of cut stems of rose and carnation (chapter 1). In the second chapter we evaluated  the application of anti-transpirant compounds that may act indirectly or directly on rose cut stems transpiration, in order to control the water use and longevity during the vase life.  Finally (Chapter 3) we assessed how anti ethylene compounds may delay senescence phenomena of carnation cut stems,  with the purpose to evaluate this effect in terms of on water balance, hydration and longevity during the vase life.
Estimates of the optimal density and kissing number of sphere packings in high dimensions
Creators: name: Scardicchio, A.
name: Stillinger, F. H.
name: Torquato, S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The problem of finding the asymptotic behavior of the maximal density of sphere packings in high Euclidean dimensions is one of the most fascinating and challenging problems in discrete geometry. One century ago, Minkowski obtained a rigorous lower bound that is controlled asymptotically by $1/2^d$, where $d$ is the Euclidean space dimension. An indication of the difficulty of the problem can be garnered from the fact that exponential improvement of Minkowski's bound has proved to be elusive, even though existing upper bounds suggest that such improvement should be possible. Using a statistical-mechanical procedure to optimize the density associated with a "test" pair correlation function and a conjecture concerning the existence of disordered sphere packings [S. Torquato and F. H. Stillinger, Experimental Math. {\bf 15}, 307 (2006)], the putative exponential improvement was found with an asymptotic behavior controlled by $1/2^{(0.77865...)d}$. Using the same methods, we investigate whether this exponential improvement can be further improved by exploring other test pair correlation functions correponding to disordered packings. We demonstrate that there are simpler test functions that lead to the same asymptotic result. More importantly, we show that there is a wide class of test functions that lead to precisely the same exponential improvement and therefore the asymptotic form $1/2^{(0.77865...)d}$ is much more general than previously surmised.
description: 23 pages, 4 figures, submitted to Phys. Rev. E