cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Mössbauer spectroscopic study of a sigma-Fe65.9V34.1 alloy: Curie and Debye temperatures
Creators: name: Żukrowski, J.
name: Dubiel, S. M.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Sigma-phase Fe65.9V34.1 alloy was investigated with the Mössbauer spectroscopy. Mössbauer spectra were recorded in the temperature interval of 80-300 K. Their analysis in terms of the hyperfine distribution protocol yielded the average hyperfine field, , the average center shift, , and the spectral area, A. The magnetic ordering temperature, T_C=312.5(5) K was determined from the temperature dependence of , and the Debye temperature, T_D, from the temperature dependence of and the relative spectral area. The value obtained from the former was 403(17) K and that from the latter 374(2) K. The value of the force constant was determined. The lattice dynamics of Fe atoms was described in terms of the kinetic, E_k, and the potential energy, E_p.
description: 14 pages, 8 figures, 14 references
Begonia fiebrigii De Candolle 1914
Creators: name: Martín, Claudia M.
name: Ospina, Juan C.
name: Zanotti, Christian A.
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Cucurbitales
Begoniaceae
Begonia
Begonia fiebrigii

description: Begonia fiebrigii De Candolle (1914:123).
 Lectotype:— PARAGUAY. ‘In regione fluminis Alto Paraná’, 1910, K.A.G. Fiebrig 6313 (lectotype G 00077059 (four sheets)! designated here, isolectotypes G 00085119!, G 00077060 (drawing)!, SI 001119!, B 100247909!, B 100247910!, GH 00068232!, US 00115309!).
 Taxonomic notes:—De Candolle cited in the protologue of B. fiebrigii ‘ Alto Parana: K. Fiebrig n. 6313’. Two specimens and an illustration corresponding to Fiebrig 6313 were found in G. Then, we considering the lectotypifications proposals by Prado et al. (2015) for this case, because they indicate the fact that the types of many older names are syntypes (see Art. 9.5) not holotypes, and we chose the specimen G 00077059 as a lectotype for B. fiebrigii, because it is a complete specimen and coincides with the illustration accompanying the protologue. In addition, it bears the original label with the name of the species by De Candolle’s handwriting in 1913. The specimen chose as a lectotype (G 00077059) was mounted on four sheets and represents a unique specimen of this collection (Gautier et al. 2016).
description: Published as part of Martín, Claudia M., Ospina, Juan C. & Zanotti, Christian A., 2017, Nomenclature issues into southern of South American species of Begonia (Begoniaceae), pp. 129-134 in Phytotaxa 314 (1) on page 132, DOI: 10.11646/phytotaxa.314.1.13, http://zenodo.org/record/13686341
title: PERMA Lead
title: Der Einsatz des Positive Leadership Führungsansatzes als Instrument während der Covid-19 Pandemie
titleType: Subtitle
Creators: name: Kristler, Katrin
Publisher: name: FH CAMPUS 02 (CAMPUS 02 Fachhochschule der Wirtschaft)
Year: 2023
Subjects: subject: 658 Allgemeines Management

description: Bereits seit einigen Jahren unterliegt die Führungsforschung den Herausforderungen der sich auch durch die Digitalisierung entwickelnden Veränderungen, jedoch hat die aufkommende Covid-19 Pandemie im März 2020 sowohl die Weltwirtschaft als auch Führungskräfte vor eine unerwartete Krise gestellt. Weder Unternehmen noch Regierungen waren auf diese Krise vorbereitet. Die Auswirkungen der nach wie vor nicht überstandenen Pandemie waren branchenabhängig sehr unterschiedlich. Durch die besonderen Herausforderungen an Führungskräfte während der Krise und einem relativ jungen Führungsmodell namens PERMA-Lead, sollen in der vorliegenden Arbeit hilfreiche Bewältigungsstrategien für Organisationen und Führungskräfte aufgezeigt werden. Durch die Beleuchtung der Entwicklung der Führungsforschung im Wandel der Zeit wird die notwendige Adaptierung von Führungsverhalten beleuchtet. Konkretes Führungsverhalten zu identifizieren ist jedoch auch in der Vergangenheit durch Positive Leadership Ansätze nicht vollends gelungen. Daher untersucht die vorliegende Forschungsarbeit den Einsatz im Zusammenhang mit der Bedeutung des PERMA-Lead Modells während der Covid-19 Pandemie. Die Vorteile in Krisen von Positive Leadership Herangehensweisen und die bisherige Wirksamkeit des Modells werden theoretisch dargestellt und folglich mit der empirischen Untersuchung durch qualitative ExpertInneninterviews hilfreicher PERMA-Lead Strategien und dem Krisenbewältigungsbeitrag des Modells verknüpft. Konkretes Führungsverhalten wird bereits durch das theoretische Modell vorgeschlagen und durch die empirische Untersuchung der qualitativen Forschung ergänzt. Die Ergebnisse der Untersuchung zeigen, dass PERMA-Lead während der Krise durchaus als hilf-reiches Instrument anzusehen ist und bestätigen die Wirksamkeit im Rahmen der vorliegenden Arbeit, beschränken die Wirkungsbreite jedoch auf Grund der Notwendigkeit einer prozesshaften zeit- und ressourcenintensiven Implementierung bereits vor Krisenausbruch. Der Vorteil durch das PERMA-Lead ergibt sich nämlich vorwiegend durch eine bereits vor der Krise erarbeitete Position, die das Unternehmen und die MitarbeiterInnen für die Krise stärkt.
Evaluating adult’s health-related values and preferences about unprocessed red meat and processed meat consumption: protocol for a cross-sectional mixed-methods study
Creators: name: Valli, Claudia
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Medicine and Health Sciences

description: This study, as part of NutriRECS initiative (Nutritional Recommendations) (www.nutrirecs.com), aims to evaluate adults’ values and preferences regarding meat intake and their willingness to change their consumption in the face of possible undesirable health consequences.
Local density of states for nanoplasmonics
Creators: name: Shahbazyan, Tigran V.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We obtain the local density of states (LDOS) for any nanoplasmonic system in the frequency range dominated by a localized surface plasmon. By including the Ohmic losses in a consistent way, we show that the plasmon LDOS is proportional to the local field intensity normalized by the absorbed power. We obtain explicit formulas for the energy transfer (ET) between quantum emitters and plasmons as well as between donors and acceptors situated near a plasmonic structure. In the latter case, we find that the plasmon-assisted ET rate is proportional to the LDOS product at the donor and acceptor positions, obtain, in a general form, the plasmon ET enhancement factor, and establish the transition onset between Forster-dominated and plasmon-dominated ET regimes.
description: 6 pages, 1 figure
On the Partial Analytical Solution of the Kirchhoff Equation
Creators: name: Michels, Dominik L.
name: Lyakhov, Dmitry A.
name: Gerdt, Vladimir P.
name: Sobottka, Gerrit A.
name: Weber, Andreas G.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We derive a combined analytical and numerical scheme to solve the (1+1)-dimensional differential Kirchhoff system. Here the object is to obtain an accurate as well as an efficient solution process. Purely numerical algorithms typically have the disadvantage that the quality of solutions decreases enormously with increasing temporal step sizes, which results from the numerical stiffness of the underlying partial differential equations. To prevent that, we apply a differential Thomas decomposition and a Lie symmetry analysis to derive explicit analytical solutions to specific parts of the Kirchhoff system. These solutions are general and depend on arbitrary functions, which we set up according to the numerical solution of the remaining parts. In contrast to a purely numerical handling, this reduces the numerical solution space and prevents the system from becoming unstable. The differential Kirchhoff equation describes the dynamic equilibrium of one-dimensional continua, i.e. slender structures like fibers. We evaluate the advantage of our method by simulating a cilia carpet.
description: 13 Pages, 1 Figure
The Spectrum of Pluto, 0.40 - 0.93 $μ$m I. Secular and longitudinal distribution of ices and complex organics
Creators: name: Lorenzi, V.
name: Pinilla-Alonso, N.
name: Licandro, J.
name: Cruikshank, D. P.
name: Grundy, W. M.
name: Binzel, R. P.
name: Emery, J. P.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Context. During the last 30 years the surface of Pluto has been characterized, and its variability has been monitored, through continuous near-infrared spectroscopic observations. But in the visible range only few data are available. Aims. The aim of this work is to define the Pluto's relative reflectance in the visible range to characterize the different components of its surface, and to provide ground based observations in support of the New Horizons mission. Methods. We observed Pluto on six nights between May and July 2014, with the imager/spectrograph ACAM at the William Herschel Telescope (La Palma, Spain). The six spectra obtained cover a whole rotation of Pluto (Prot = 6.4 days). For all the spectra we computed the spectral slope and the depth of the absorption bands of methane ice between 0.62 and 0.90 $μ$m. To search for shifts of the center of the methane bands, associated with dilution of CH4 in N2, we compared the bands with reflectances of pure methane ice. Results. All the new spectra show the methane ice absorption bands between 0.62 and 0.90 $μ$m. The computation of the depth of the band at 0.62 $μ$m in the new spectra of Pluto, and in the spectra of Makemake and Eris from the literature, allowed us to estimate the Lambert coefficient at this wavelength, at a temperature of 30 K and 40 K, never measured before. All the detected bands are blue shifted, with minimum shifts in correspondence with the regions where the abundance of methane is higher. This could be indicative of a dilution of CH4:N2 more saturated in CH4. The longitudinal and secular variations of the parameters measured in the spectra are in accordance with results previously reported in the literature and with the distribution of the dark and bright material that show the Pluto's albedo maps from New Horizons.
description: This manuscript may change and improve during the reviewing process. The data reduction and calibration is reliable and has been checked independently using different reduction approaches. The data will be made publicily available when the paper is accepted. If you need them before, please, contact the author
The Effect of Iron Status during Pregnancy on Hearing Functions in the Newborn.
Creators: name: Doorsian, Mona
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2017
Subjects: Otoacoustic Emission (OAE)
Auditory Brainstem Responses (ABR)
Iron Deficiency Anemia (IDA)
Hemoglobin (Hb)
Mean Corpuscular Volume (MCV)
Hematocrit (HCT)

description: Background: Iron deficiency, anemia, and iron excess have been associated with altered hearing functions in children and adults. Animal studies suggest that iron deficiency during pregnancy negatively affect fetal auditory development. The relationship between maternal iron status and auditory functions in healthy term newborns has not been clearly elucidated among humans. The goal of this pilot study was to determine the relationship between markers of iron status during pregnancy and brainstem auditory function in healthy neonates. Methods: Pregnant women who gave birth at the Montfort Hospital were recruited to take part in this study (n=6). Within two weeks after birth, their newborn’s hearing function was assessed by wave amplitude, latency and inter-latency from the Auditory Brainstem Response (ABR) test. Markers of iron status, namely hemoglobin (Hb) and mean corpuscular volume (MCV), were collected retrospectively for the first and second trimester from the women’s medical chart. Results: Overall, no significant relationship was observed between maternal Hb and MCV concentrations and newborns auditory function. Although two significant Spearman correlations were observed (MCV and inter-latency I-V; r=0.87; p=0.005 and Hb and amplitude V; r=0.89; p=0.04), these findings may be due to chance because of multiple testing and the small sample size. Conclusion: Although iron is a key nutrient involved in the brain and auditory system development, we were not able to demonstrate a relationship between iron status during pregnancy and newborn hearing function. Prospective or intervention studies with a larger sample size and with more specific iron markers (ex. ferritin) are required to confirm these findings.
Begonia micranthera , Grisebach 1874
Creators: name: Martín, Claudia M.
name: Ospina, Juan C.
name: Zanotti, Christian A.
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Cucurbitales
Begoniaceae
Begonia
Begonia micranthera

description: Begonia micranthera Grisebach (1874: 148).
 Type:— ARGENTINA. ‘ Tucumán. Siambon’, March 1872, P.G. Lorentz 281 (lectotype GOET 000317! designated here).
 Taxonomic notes:—In the protologue of B. micranthera, Grisebach (1874) cited “Tucumán in silvis umbrosis reg. Subtropic. Pr. Siambon”. This author did not indicate any specimen for this taxon, but the plants described in this work were collected by P.G. Lorentz between 1871 and 1872 (see, Grisebach 1874: 49). Three collections corresponding to the type locality were found [G.H.E.W. Hieronymus & P.G. Lorentz 901 (B 10 0186655! and a photo of Field Museum F0 BN 020864!); P.G. Lorentz & G.H.E.W. Hieronymus 1051 (NY 00118631!, US 00115391!); P.G. Lorentz 281 (GOET 000317!)]. We consider that these collections correspond to the original material studied by Grisebach in 1874, and therefore can be considered syntypes (Art. 9.5, ICN 2012). For these reason, we chose the specimen GOET 000317! as a lectotype of B. micranthera, because it corresponds to the description and locality included in the protologues, as well as the date specified in the introduction by Grisebach (1874: 49). Finally, this collection is housed in GOET that was Grisebach’s workplace (Stafleu & Cowan 1979).
description: Published as part of Martín, Claudia M., Ospina, Juan C. & Zanotti, Christian A., 2017, Nomenclature issues into southern of South American species of Begonia (Begoniaceae), pp. 129-134 in Phytotaxa 314 (1) on page 132, DOI: 10.11646/phytotaxa.314.1.13, http://zenodo.org/record/13686341
The mean shape of transition and first-passage paths
Creators: name: Kim, Won Kyu
name: Netz, Roland R.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We calculate the mean shape of transition paths and first-passage paths based on the one-dimensional Fokker-Planck equation in an arbitrary free energy landscape including a general inhomogeneous diffusivity profile. The transition path ensemble is the collection of all paths that do not revisit the start position $x_A$ and that terminate when first reaching the final position $x_B$. In contrast, a first-passage path can revisit but not cross its start position $x_A$ before it terminates at $x_B$. Our theoretical framework employs the forward and backward Fokker-Planck equations as well as first-passage, passage, last-passage and transition-path time distributions, for which we derive the defining integral equations. We show that the mean time at which the transition path ensemble visits an intermediate position $x$ is equivalent to the mean first-passage time of reaching the starting position $x_A$ from $x$ without ever visiting $x_B$. The mean shape of first-passage paths is related to the mean shape of transition paths by a constant time shift. Since for large barrier height $U$ the mean first-passage time scales exponentially in $U$ while the mean transition path time scales linearly inversely in $U$, the time shift between first-passage and transition path shapes is substantial. We present explicit examples of transition path shapes for linear and harmonic potentials and illustrate our findings by trajectories generated from Brownian dynamics simulations.
Implementing Efficient All Solutions SAT Solvers
Creators: name: Toda, Takahisa
name: Soh, Takehide
Publisher: name: arXiv
Year: 2015
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: Artificial Intelligence (cs.AI)
subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: All solutions SAT (AllSAT for short) is a variant of propositional satisfiability problem. Despite its significance, AllSAT has been relatively unexplored compared to other variants. We thus survey and discuss major techniques of AllSAT solvers. We faithfully implement them and conduct comprehensive experiments using a large number of instances and various types of solvers including one of the few public softwares. The experiments reveal solver's characteristics. Our implemented solvers are made publicly available so that other researchers can easily develop their solver by modifying our codes and compare it with existing methods.
A Precise Determination of the Mid-Infrared Interstellar Extinction Law Based on the APOGEE Spectroscopic Survey
Creators: name: Xue, Mengyao
name: Jiang, Biwei
name: Gao, Jian
name: Liu, Jiaming
name: Wang, Shu
name: Li, Aigen
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: A precise measure of the mid-infrared interstellar extinction law is crucial to the investigation of the properties of interstellar dust, especially of the grains in the large size end. Based on the stellar parameters derived from the SDSS-III/APOGEE spectroscopic survey, we select a large sample of G- and K-type giants as the tracers of the Galactic mid-infrared extinction. We calculate the intrinsic stellar color excesses from the stellar effective temperatures and use them to determine the mid-infrared extinction for a given line of sight. For the entire sky of the Milky Way surveyed by APOGEE, we derive the extinction (relative to the K$_{\rm S}$ band at wavelength $λ=2.16μ$m) for the four WISE bands at 3.4, 4.6, 12 and 22$μ$m, the four Spitzer/IRAC bands at 3.6, 4.5, 5.8 and 8$μ$m, the Spitzer/MIPS24 band at 23.7$μ$m and for the first time, the AKARI/S9W band at 8.23$μ$m. Our results agree with previous works in that the extinction curve is flat in the ~3--8$μ$m wavelength range and is generally consistent with the $R_V=5.5$ model curve except our determination exceeds the model prediction in the WISE/W4 band. Although some previous works found that the mid-IR extinction law appears to vary with the extinction depth $A_{\rm{K_S}}$, no noticeable variation has been found in this work. The uncertainties are analyzed in terms of the bootstrap resampling method and Monte-Carlo simulation and are found to be rather small.
description: The bandpass coverage of WISE in Fig.18 changed from photon-counting relative system response (RSR) to QE-based (response per photon) RSR
Mapping a fractional quantum Hall state to a fractional Chern insulator
Creators: name: Zhang, Yinhan
name: Shi, Junren
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We establish a variational principle for properly mapping a fractional quantum Hall (FQH) state to a fractional Chern insulator (FCI). We find that the mapping has a gauge freedom which could generate a class of FCI ground state wave functions appropriate for different forms of interactions. Therefore, the gauge should be fixed by a variational principle that minimizes the interaction energy of the FCI model. For a soft and isotropic electron-electron interaction, the principle leads to a gauge coinciding with that for maximally localized \emph{two-dimensional} projected Wannier functions of a Landau level.
description: 8 pages, 5 figures
The model of the black hole enclosed in dust. The flat space case
Creators: name: Jaluvkova, Pavlina
name: Kopteva, Elena
name: Stuchlik, Zdenek
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this work the model is constructed to describe the black hole enclosed in the dust cosmological background in case of zero spatial curvature. This model is based on our exact solution of the class of LTB inhomogeneous solutions. We considered the properties of the model and built the R-T-structure of the resulting space-time. It was shown that central region includes the Schwarzchild-like black hole. We derived the equations of motion of the test particle from the point of view of the observer comoving with cosmological expansion. We found analytical expressions for observable orbital and radial velocities of the particle and plotted the surface profile of the total velocity in this case. In comoving coordinate frame it is impossible to study the questions concerning the black hole horizon but one can observe the local motion of the particles influenced by the cosmological expansion.
description: 9 pages, 4 figures
LHC dijet constraints on double beta decay
Creators: name: Helo, J. C.
name: Hirsch, M.
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We use LHC dijet data to derive constraints on neutrinoless double beta decay. Upper limits on cross sections for the production of "exotic" resonances, such as a right-handed W boson or a diquark, can be converted into lower limits on the double beta decay half-life for fixed choices of other parameters. Constraints derived from run-I data are already surprisingly strong and complementary to results from searches using same-sign dileptons plus jets. For the case of the left-right symmetric model, in case no new resonance is found in future runs of the LHC and assuming $g_L=g_R$, we estimate a lower limit on the double beta decay half-live larger than $10^{27}$ ys can be derived from future dijet data, except in the window of relatively light right-handed neutrino masses in the range $0.5$ MeV to $50$ GeV. Part of this mass window will be tested in the upcoming SHiP experiment. We also discuss current and future limits on possible scalar diquark contributions to double beta decay that can be derived from dijet data.
description: 13 pages, 5 figures
Long term continuous radon monitoring in a seismically active area
Creators: name: Piersanti, A.
name: Cannelli, V.
name: Galli, G.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: We present the results of a long term, continuous radon monitoring experiment started in April 2010 in a seismically active area, affected during the 2010-2013 data acquisition time window by an intense micro seismic activity and by several small seismic events. We employed both correlation and cross-correlation analyses in order to investigate possible relationship existing between the collected radon data, seismic events and meteorological parameters. Our results do not support the feasibility of a robust one-to-one association between the small magnitude earthquakes characterizing the local seismic activity and single radon measurement anomalies, but evidence significant correlation patterns between the spatio-temporal variations of seismic moment release and soil radon emanations, the latter being anyway dominantly modulated by meteorological parameters variations.
The Terror Management Health Model and the Role of Fear Appeals: A Systematic Review
Creators: name: Courtney, Emily
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Social and Behavioral Sciences
subject: Fear Appeals
subject: Qualitative Synthesis
subject: Systematic Review
subject: Terror Management Health Model
subject: Terror Management Theory

description: The current project is a systematic review literature focused on the terror management health model, integrating other research from public health fear appeal literature in which death is the primary source of fear. The review aims to do the following: 1) Discuss proximal health-based defenses against the awareness of mortality; 2) Define proximal defenses in the context of public health fear appeal literature where death is the primary source of fear; 3) Discuss distal health-based defenses against the awareness of mortality 4) Discuss the extent to which distal health-based defenses hinge upon self and identity relevance; 5) Use these areas to help determine future directions for fear appeal and terror management literature
Harnessing disordered quantum dynamics for machine learning
Creators: name: Fujii, Keisuke
name: Nakajima, Kohei
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: Neural and Evolutionary Computing (cs.NE)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Quantum computer has an amazing potential of fast information processing. However, realisation of a digital quantum computer is still a challenging problem requiring highly accurate controls and key application strategies. Here we propose a novel platform, quantum reservoir computing, to solve these issues successfully by exploiting natural quantum dynamics, which is ubiquitous in laboratories nowadays, for machine learning. In this framework, nonlinear dynamics including classical chaos can be universally emulated in quantum systems. A number of numerical experiments show that quantum systems consisting of at most seven qubits possess computational capabilities comparable to conventional recurrent neural networks of 500 nodes. This discovery opens up a new paradigm for information processing with artificial intelligence powered by quantum physics.
description: 19 pages, 13 figures
A uvbyCaHbeta CCD Analysis of the Open Cluster Standard, NGC 752
Creators: name: Twarog, B. A.
name: Anthony-Twarog, B. J.
name: Deliyannis, C. P.
name: Thomas, D. T.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Precision uvbyCaHbeta photometry of the nearby old open cluster, NGC 752, is presented. The mosaic of CCD fields covers an area ~42' on a side with internal precision at the 0.005 to 0.010 mag level for the majority of stars down to V~15. The CCD photometry is tied to the standard system using an extensive set of published photoelectric observations adopted as secondary standards within the cluster. Multicolor indices are used to eliminate as nonmembers a large fraction of the low probability proper-motion members near the faint end of the main sequence, while identifying 24 potential dwarf members between V=15.0 and 16.5, eight of which have been noted before from Vilnius photometry. From 68 highly probable F dwarf members, we derive a reddening estimate of E(b-y)= 0.025 +/- 0.003 (E(B-V) = 0.034 +/- 0.004), where the error includes the internal photometric uncertainty and the systematic error arising from the choice of the standard (b-y), Hbeta relation. With reddening fixed, [Fe/H] is derived from the F dwarf members using both m_1 and hk, leading to [Fe/H] = -0.071 +/-0.014 (sem) and -0.017 +/- 0.008 (sem), respectively. Taking the internal precision and possible systematics in the standard relations into account, [Fe/H] for NGC 752 becomes -0.03 +/-0.02. With the reddening and metallicity defined, we use the Victoria-Regina isochrones on the Stromgren system and find an excellent match for (m-M) = 8.30 +/- 0.05 and an age of 1.45 +/- 0.05 Gyr at the appropriate metallicity.
description: 37 pages, 11 figures, 4 tables. Accepted to Astronomical Journal
A color-period diagram for the open cluster M 48 (NGC 2548), and its rotational age
Creators: name: Barnes, Sydney A.
name: Weingrill, Jörg
name: Granzer, Thomas
name: Spada, Federico
name: Strassmeier, Klaus G.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Rotation periods are increasingly being used to derive ages for cool single field stars. Such ages are based on an empirical understanding of how cool stars spin down, acquired by constructing color-period diagrams (CPDs) for a series of open clusters. Our main aims here are to construct a CPD for M 48, to compare this with other clusters of similar age to check for consistency, and to derive a rotational age for M 48 using gyrochronology. We monitored M 48 photometrically for over 2 months with AIP's STELLA I 1.2 m telescope and the WiFSIP 4K imager in Tenerife. Light curves with 3 mmag precision for bright (V~14 mag) stars were produced and then analysed to provide rotation periods. A cluster CPD has then been constructed. We report 62 rotation periods for cool stars in M 48. The CPD displays a clear slow/I-sequence of rotating stars, similar to those seen in the 625 Myr-old Hyades and 590 Myr-old Praesepe clusters, and below both, confirming that M 48 is younger. A similar comparison with the 250 Myr-old M 34 cluster shows that M 48 is older and does not possess any fast/C-sequence G or early K stars like those in M 34, although relatively fast rotators do seem to be present among the late-K and M stars. A more detailed comparison of the CPD with rotational evolution models shows that the cluster stars have a mean age of 450 Myr, and its (rotating) stars can be individually dated to +-117 Myr (26%). Much of this uncertainty stems from intrinsic astrophysical spread in initial periods, and almost all stars are consistent with a single age of 450 Myr. The gyro-age of M 48 as a whole is 450+-50 Myr, in agreement with the previously determined isochrone age of 400+-100 Myr.
Stability of normalized solitary waves for three coupled nonlinear Schrodinger equations
Creators: name: Bhattarai, Santosh
Publisher: name: arXiv
Year: 2015
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 35Q55, 35B35, 35A15

description: In this paper we establish existence and stability results concerning fully nontrivial solitary-wave solutions to 3-coupled nonlinear Schrödinger system \[ i\partial_t u_{j}+\partial_{xx}u_{j}+ \left(\sum_{k=1}^{3} a_{kj} |u_k|^{p}\right)|u_j|^{p-2}u_j = 0, \ j=1,2,3, \] where $u_j$ are complex-valued functions of $(x,t)\in \mathbb{R}^{2}$ and $a_{kj}$ are positive constants satisfying $a_{kj}=a_{jk}$ (symmetric attractive case). Our approach improves many of the previous known results. In all methods used previously to study solitary waves, which we are aware of, the variational problem has consisted of finding the extremum of an energy functional subject to the constraints that were not independently chosen. Here we study a problem of minimizing the energy functional subject to three independent $L^2$ mass constraints and establish existence and stability results for a true three-parameter family of solitary waves.
description: 28 pages. Analogous results on $L^2$ normalized solutions for 2-coupled nonlinear Schr\"odinger system are proved in our earlier work arXiv:1406.2418
Spatial structure of Sinai-Ruelle-Bowen measures
Creators: name: Chernov, N.
name: Korepanov, A.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: Sinai-Ruelle-Bowen measures are the only physically observable invariant measures for billiard dynamical systems under small perturbations. These measures are singular, but as it was observed, marginal distributions of spatial and angular coordinates are absolutely continuous. We generalize these facts and provide full mathematical proofs.
Single-shot implementation of dispersion-scan for the characterization of ultrashort laser pulses
Creators: name: Fabris, Davide
name: Holgado, Warein
name: Silva, Francisco
name: Witting, Tobias
name: Tisch, John W. G.
name: Crespo, Helder
Publisher: name: arXiv
Year: 2015
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We demonstrate a novel, single-shot ultrafast diagnostic, based on the dispersion-scan (d-scan) technique. In this implementation, rather than scanning wedges to vary the dispersion as in standard d-scan, the pulse to be measured experiences a spatially varying amount of dispersion in a Littrow prism. The resulting beam is then imaged into a second-harmonic generation crystal and an imaging spectrometer is used to measure the two-dimensional trace, which is analyzed using the d-scan retrieval algorithm. We compare the single-shot implementation with the standard d-scan for the measurement of sub-3.5-fs pulses from a hollow core fiber pulse compressor. We show that the retrieval algorithm used to extract amplitude and phase of the pulse provides comparable results, proving the validity of the new single-shot implementation down to near single-cycle durations.
description: 6 pages, 4 figures
Η επίδραση της πανδημίας covid-19 στην επαγγελματική εξουθένωση των μελών της πρωτοβάθμιας φροντίδας υγείας
Creators: name: Σεργάκη, Κυριακή Μαρία Ιωσήφ
Publisher: name: Aristotle University of Thessaloniki
Year: 2023
Subjects: Επαγγελματική εξουθένωση
Πανδημία κορονοϊού
Επαγγελματίες υγείας
Burnout
Pandemic Covid-19
Physicians

description: Σκοπός: Η παρούσα εργασία είχε ως βασικό στόχο της μελέτη της επίδρασης της πανδημίας του covid-19 στην εμφάνιση των χαρακτηριστικών του συνδρόμου επαγγελματικής εξουθένωσης στο σύνολο των επαγγελματιών υγείας. Μέθοδοι: Κατασκευάστηκε ερωτηματολόγιο δημογραφικών στοιχείων. Χρησιμοποιήθηκε για την επαγγελματική εξουθένωση το ερωτηματολόγιο Μaslach Burnout Inventory (ΜΒΙ). Έγινε διανομή και συμπλήρωση των ερωτηματολογίων διαδικτυακά μέσω GoogleForms. Τα αποτελέσματα αναλύθηκαν με τα υπολογιστικά φύλλα. Απαντήθηκε από 50 εργαζομένους δομών υγείας της 7ης ΥΠΕ. Αποτελέσματα:Σύμφωνα με την παρούσα έρευνα η πλειοψηφία των ερωτηθέντων ήταν γυναίκες (84%), σε αντίθεση με τους άντρες που ήταν (16%). To 60% δεν είναι ευχαριστημένοι από τις οικονομικές απολαβές που τους προσφέρει η εργασία τους. Το 34% θα άφηνε σίγουρα τη δουλειά του για μια καλύτερη ευκαιρία. Στην ερώτηση «Με ενδιαφέρει πραγματικά τι συμβαίνει στους ασθενείς μου.» το 38% δήλωσε ότι πάντα ενδιαφέρεται. Oι ερωτηθέντες σημείωσαν σκορ υψηλής συναισθηματικής εξουθένωσης, αποπροσωποποίησης και αισθήματος έλλειψης επαγγελματικών επιτευγμάτων σε ποσοστά 74%, 70% και 40% αντίστοιχα. Το 60% ερωτηθέντων εμφανίζει υψηλά σκορ επαγγελματικής εξουθένωσης και στις 3 κατηγορίες. Συμπεράσματα: Από τα αποτελέσματα φάνηκε ότι η επαγγελματική εξουθένωση είναι αρκετά συχνό φαινόμενο κατά την περίοδο της πανδημίας του Covid-19.
description: Methods used: Α demographics questionnaire was made. The Μaslach Burnout Inventory (ΜΒΙ) questionnaire was used for the burn- out. The distribution and the questionnaire completion took place online through google forms. The results were analyzed with spread- sheets. It was replied from 50 healthcare workers from several units throughout the local region. Results: The majority of the people who participated were women (84%), in contrast with men (16%). A percentage of 60% isn't contented with the amount of money that they earn from their job. A percentage of 34% would definitely leave their job for a better chance. In the question asked '' Do I care about what happens to my patients'' only a percentage of 38% stated that are always interested. Questioned people marked high burnout scores (74%), depersonalization (70%), and no personal goals achievement feeling (40%). 60% of the people asked showed high scores of burnout in both three categories. Conclusion: From the results was shown that burnout is a very common effect, especially during the pandemic covid-19.
Begonia micranthera var. hieronymi Smith & Schubert 1941
Creators: name: Martín, Claudia M.
name: Ospina, Juan C.
name: Zanotti, Christian A.
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Cucurbitales
Begoniaceae
Begonia
Begonia micranthera
Begonia micranthera var. hieronymi (lindau) smith & schubert (1941: 96)

description: Begonia micranthera var. hieronymi (Lindau) Smith & Schubert (1941: 96).
 Basionym: Begonia hieronymi Lindau (1895: 14). Lectotype:— ARGENTINA. Tucumán: [Department of Tafí del Valle], La Ciénaga, Sierra de Tucumán, 10–17 January 1874, G.H.E.W. Hieronymus & P.G. Lorentz 644 (lectotype B 10 0186668! designated here, isolectotypes B 10 0186669!, B 10 0186670!, CORD 00003573!, CORD 00003574!, F0BN020863 (photo)!, GOET 000315!, GOET 000316!).
 Taxonomic notes:—In the protologue of B. hieronymi, Lindau cited two syntypes [TUCUMAN: Prope La Ciénaga, Sierra de Tucuman (L. et H. N. 644, 724)]. We chose the specimen G.H.E.W. Hieronymus & P.G. Lorentz 644 (B 10 0186668!) as a lectotype, because it is more widely represented in different herbaria, it is the more complete specimen and bears the original label with the name of the species by Lindau’s handwriting.
description: Published as part of Martín, Claudia M., Ospina, Juan C. & Zanotti, Christian A., 2017, Nomenclature issues into southern of South American species of Begonia (Begoniaceae), pp. 129-134 in Phytotaxa 314 (1) on pages 132-133, DOI: 10.11646/phytotaxa.314.1.13, http://zenodo.org/record/13686341
Partition function zeros for the Ising model on complete graphs and on annealed scale-free networks
Creators: name: Krasnytska, M.
name: Berche, B.
name: Holovatch, Yu.
name: Kenna, R.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We analyze the partition function of the Ising model on graphs of two different types: complete graphs, wherein all nodes are mutually linked and annealed scale-free networks for which the degree distribution decays as $P(k)\sim k^{-λ}$. We are interested in zeros of the partition function in the cases of complex temperature or complex external field (Fisher and Lee-Yang zeros respectively). For the model on an annealed scale-free network, we find an integral representation for the partition function which, in the case $λ> 5$, reproduces the zeros for the Ising model on a complete graph. For $3
description: 36 pages, 31 figures
Ιερά Μονή Ευαγγελίστριας Άνω Πεδινών Ιωαννίνων και ο Νεόφυτος Δούκας
Creators: name: Καφφές, Θωμάς Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2023
Subjects: subject: Ευαγγελίστρια
subject: Τουρισμός
subject: Νεόφυτος Δούκας
subject: Evagelistria
subject: Tourism
subject: FOS: Economics and business
subject: Νeofitos Dοukas

description: Η εργασία μας, είναι μια έρευνα που αναφέρεται στην συνοπτική ιστορία της Ιεράς Μονής της Ευαγγελίστριας του νομού Ιωαννίνων στην περιοχή των Άνων Πεδινών. Στην συγκεκριμένη μονή έζησε και πέρασε κάποια από τα χρόνια της ζωής του ο Ηπειρώτης λόγιος και ιερομόναχος Νεόφυτος Δούκας. Σε συνδυασμό με την ιστορία, την αρχιτεκτονική, την ανάλυση των κτηριακών συγκροτημάτων και την νεότερη περίοδο της μονής, θα αναφερθούμε και στο έργο και την ζωή του Νεόφυτου Δούκα. Μέσα από ιστορικές έρευνες, μέσα από μελέτες ιστορικών αλλά και από την διήγηση της μοναχής Ευφημίας που εγκαταβιώνει στην Ιερά Μονή της Ευαγγελίστριας, θα μιλήσουμε και θα γράψουμε για όλα τα παραπάνω, όπως αξίζει σε αυτόν τον τόπο που τα τελευταία χρόνια είναι ένας από τους δημοφιλέστερους τουριστικούς προορισμούς ολόκληρης της Ελλάδος.
description: Our work is a research that refers to the brief history of the Holy Monastery of Evangelistria in the prefecture of Ioannina in the area of Ano Pedina. The Epirot scholar and hieromonk Neophytos Doukas lived and spent some years of his life in this particular monastery. In combination with the history, the architecture, the analysis of the building complexes and the newer period of the monastery, we will also refer to the work and life of Neophytos Doukas. Through historical research, through studies of historians, but also through the narration of the nun Euphimia who lives in the Holy Monastery of Evangelistria, we will talk and write about all of the above, as it deserves in this place which in recent years has been one of the most popular tourist destinations of the whole of Greece.
D-JRP15-FED-AMR-WP2.7 Quantity and stability of free extracellular DNA observed in environmental compartments tested so far (T2.7)
Creators: name: Cabal Rosel, Adriana
name: Caniça, Manuela
name: De Menezes, Alexandre
Publisher: name: Zenodo
Year: 2022
Subjects: FED-AMR
extracellular DNA
exDNA

description: In task JRP15-R2-WP2-T7 (Isolate and assess quantity, diversity and stability of free extracellular ARG encoding DNA in the tested environments. Sequence comparisons.) We used the extracted extracellular free DNA from all the collected samples the samples according to the generated protocols based on previous literature available. We performed gene enrichment as described in WP2-T3.
The Role of Plate Tectonic-Climate Coupling and Exposed Land Area in the Development of Habitable Climates on Rocky Planets
Creators: name: Foley, Bradford J.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The long-term carbon cycle is vital for maintaining liquid water oceans on rocky planets due to the negative climate feedbacks involved in silicate weathering. Plate tectonics plays a crucial role in driving the long-term carbon cycle because it is responsible for CO$_2$ degassing at ridges and arcs, the return of CO$_2$ to the mantle through subduction, and supplying fresh, weatherable rock to the surface via uplift and orogeny. However, the presence of plate tectonics itself may depend on climate according to recent geodynamical studies showing that cool surface temperatures are important for maintaining vigorous plate tectonics. Using a simple carbon cycle model, I show that the negative climate feedbacks inherent in the long-term carbon cycle are uninhibited by climate's effect on plate tectonics. Furthermore, initial atmospheric CO$_2$ conditions do not impact the final climate state reached when the carbon cycle comes to equilibrium, as long as liquid water is present and silicate weathering can occur. Thus an initially hot, CO$_2$ rich atmosphere does not prevent the development of a temperate climate and plate tectonics on a planet. However, globally supply-limited weathering does prevent the development of temperate climates on planets with small subaerial land areas and large total CO$_2$ budgets because supply-limited weathering lacks stabilizing climate feedbacks. Planets in the supply-limited regime may become inhospitable for life and could experience significant water loss. Supply-limited weathering is less likely on plate tectonic planets, because plate tectonics promotes high erosion rates and thus a greater supply of bedrock to the surface.
description: Accepted at Ap. J., 54 pages, 14 figures
$μ$-tempered metadynamics: Artifact independent convergence times for wide hills
Creators: name: Dickson, Bradley M.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Recent analysis of well-tempered metadynamics (WTmetaD) showed that it converges without mollification artifacts in the bias potential. Here we explore how metadynamics heals mollification artifacts, how healing impacts convergence time, and whether alternative temperings may be used to improve efficiency. We introduce "$μ$-tempered" metadynamics as a simple tempering scheme, inspired by a related mollified adaptive biasing potential (mABP), that results in artifact independent convergence of the free energy estimate. We use a toy model to examine the role of artifacts in WTmetaD and solvated alanine dipeptide to compare the well-tempered and $μ$-tempered frameworks demonstrating fast convergence for hill widths as large as $60^{\circ}$ for $μ$TmetaD.
description: 2 figures, 8 pages
Assessment and added value estimation of an ensemble approach with a focus on global radiation forecasts
Creators: name: Bouallegue, Zied Ben
Publisher: name: arXiv
Year: 2015
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: The assessment of the high-resolution ensemble weather prediction system COSMO-DE-EPS is achieved with the perspective of using it for renewable energy applications. The performance of the ensemble forecast is explored focusing on global radiation, the main weather variable affecting solar power production, and on quantile forecasts, key probabilistic products for the energy sector. First, the ability of the ensemble system to capture and resolve the observation variability is assessed. Secondly, the potential benefit of the ensemble forecasting strategy compared to a single forecast approach is quantitatively estimated. A new metric called ensemble added value is proposed, aiming at a fair comparison of an ensemble forecast with a single forecast, when optimized to the users' needs. Hourly mean forecasts are verified against pyranometer measurements over verification periods covering 2013. The results show in particular that the added value of the ensemble approach is season-dependent and increases with the forecast horizon.
Strain and correlation induced half-metallic ferromagnetism in orthorhombic BaFeO$_{3}$
Creators: name: Rahman, Gul
name: Sarwar, Saad
Publisher: name: arXiv
Year: 2015
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Using first-principles calculations, the electronic and magnetic properties of orthorhombic BaFeO$_{3}$ (BFO) are investigated with local spin density approximation (LSDA). The calculations reveal that at the optimized lattice volume BFO has a lower energy in ferromagnetic state as compared with antiferromagnetic state. At the equilibrium volume, BFO shows metallic behavior, however, under a large tensile strain ($\sim25\%$), BFO shows half-metallic behavior consistent with the integer magnetic moment of $4.0μ_{\rm{B}}$/fu mainly caused by the $t_{2g}$ and $e_{g}$ electrons of Fe. Including a Hubbard-like contribution $U$ (LSDA$+U$) on Fe $d$ states induced half-metallic bahvior without external strain, which indicates that $U$ can be used to tune the electronic structure of BFO. The magnetic moments remained robust against $\sim 10\%$ compressive and tensile strain. At large compressive (tensile) strain, the half-metallicity of BFO is mainly destroyed by the Fe-$d$ (O-$p$) electrons in agreement with the non-integer value of the magnetic moments of BFO.
description: Accepted For Publication in PSS B: Basic Solid State Physics. arXiv admin note: text overlap with arXiv:1202.1431 by other authors