cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Nonlinear optical responses of organic based indole derivative: an experimental and computational study
Creators: name: Ranaa, Meenakshi
name: Chowdhury, Papia
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The nonlinear optical (NLO) properties of the Indole-7-carboxyldehyde (I7C) have been investigated by computational and experimental (UV-VIS, Raman) data analysis. Mulliken charge analysis, molecular electrostatic potential, and UV-VIS absorption and vibrational Raman studies have been used to analyze the intra-molecular charge transfer occurrence in the probe system. Observed high value of dipole moment, linear polarizability and first order hyperpolarizability values suggest that the indole derivative may indeed have possibility to show good NLO behaviour.
Two spin liquid phases in the spatially anisotropic triangular Heisenberg model
Creators: name: Yunoki, Seiji
name: Sorella, Sandro
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The quantum spin-1/2 antiferromagnetic Heisenberg model on a two dimensional triangular lattice geometry with spatial anisotropy is relevant to describe materials like ${\rm Cs_2 Cu Cl_4}$ and organic compounds like {$κ$-(ET)$_2$Cu$_2$(CN)$_3$}. The strength of the spatial anisotropy can increase quantum fluctuations and can destabilize the magnetically ordered state leading to non conventional spin liquid phases. In order to understand these intriguing phenomena, quantum Monte Carlo methods are used to study this model system as a function of the anisotropic strength, represented by the ratio $J'/J$ between the intra-chain nearest neighbor coupling $J$ and the inter-chain one $J'$. We have found evidence of two spin liquid regions. The first one is stable for small values of the coupling $J'/J \alt 0.65$, and appears gapless and fractionalized, whereas the second one is a more conventional spin liquid with a small spin gap and is energetically favored in the region $0.65\alt J'/J \alt 0.8$. We have also shown that in both spin liquid phases there is no evidence of broken translation symmetry with dimer or spin-Peirls order or any broken spatial reflection symmetry of the lattice. The various phases are in good agreement with the experimental findings, thus supporting the existence of spin liquid phases in two dimensional quantum spin-1/2 systems.
description: 35 pages, 24 figures, 3 tables
An overview of the Hamilton--Jacobi theory: the classical and geometrical approaches and some extensions and applications
Creators: name: Román-Roy, Narciso
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences
subject: Primary: 35F21, 70H03, 70H05, 70H20, Secondary: 53C15, 53C80, 70G45, 70H50, 70S05

description: This work is devoted to review the modern geometric description of the Lagrangian and Hamiltonian formalisms of the Hamilton--Jacobi theory. The relation with the "classical" Hamiltonian approach using canonical transformations is also analyzed. Furthermore, a more general framework for the theory is also briefly explained. It is also shown how, from this generic framework, the Lagrangian and Hamiltonian cases of the theory for dynamical systems are recovered, and how the model can be extended to other types of physical systems, such as higher-order dynamical systems and (first-order) classical field theories in their multisymplectic formulation.
description: 22 pp
Quantum Correlation Dynamics in Controlled Two-Coupled-Qubit Systems
Creators: name: Ghiu, Iulia
name: Grimaudo, Roberto
name: Mihaescu, Tatiana
name: Isar, Aurelian
name: Messina, Antonino
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study and compare the time evolutions of concurrence and quantum discord in a driven system of two interacting qubits prepared in a generic Werner state. The~corresponding quantum dynamics is exactly treated and manifests the appearance and disappearance of entanglement. Our analytical treatment transparently unveils the physical reasons for the occurrence of such a phenomenon, relating it to the dynamical invariance of the $X$ structure of the initial state. The~quantum correlations which asymptotically emerge in the system are investigated in detail in terms of the time evolution of the fidelity of the initial Werner state.
Studies on Size Dependent Structures and Optical Properties of CdSeS Clusters
Creators: name: Rana, Meenakshi
name: Chowdhury, Papia
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The size-dependent structures and optical properties of CdSeS nanoclusters in water medium are investigated. The stability of different size-dependent Cd$_n$Se$_m$S$_p$ nanoclusters (up to n=6) is studied using density functional theory/time-dependent density functional theory (DFT/TDDFT). The computed results for ground (S$_0$) and excited (S$_1$, S$_2$, S$_3$) states are experimentally verified through UV-Vis spectroscopy. Computed ab initio results suggest that CdSeS clusters are significantly more hyperpolarizable compared to CdX (X= S, Se, Te) clusters. Structure dependent response properties are also observed, especially for n>3. Larger hyperpolarizabilities ($β$ and$γ$), charge variation and orbital analysis establish Cd$_4$Se$_m$S$_p$ clusters, as nonlinear optically active quantum dots (QDs).
description: Optical properties of size dependent CdSeS QDs have been studied
Plasma N-terminal pro-B-type natriuretic peptide in the detection of aortic valve stenosis
Creators: name: Koljonen, Elisa
name: Lappalainen, Laura
name: Kotiranta, Sanna
name: Turpeinen, Anu
name: Vepsäläinen, Ville
name: Kärkkäinen, Satu
name: Romppanen, Jarkko
name: Selander, Tuomas
name: Hartikainen, Juha
name: Rysä, Jaana
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Space Science
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Genetics
subject: Molecular Biology
subject: Physiology
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Immunology
subject: FOS: Clinical medicine
subject: Mathematical Sciences not elsewhere classified
subject: Developmental Biology
subject: Marine Biology
subject: Cancer
subject: Mental Health

description: Systolic murmur suggestive of aortic valve origin is a common accidental finding, particularly in the elderly. Usually, it is due to aortic stenosis (AS) or aortic sclerosis (ASc). Currently, echocardiography is used to differentiate AS from ASc. Plasma N-terminal (NT)-prohormone BNP (NT-proBNP) is known to correlate with the severity of AS. We assessed whether NT-proBNP separates AS from ASc. The study population consisted of three groups: AS (n = 87, age 77 ± 7 years), ASc (n = 76, age 72 ± 10 years), and healthy controls (n = 101, age 55 ± 10 years). All subjects underwent transthoracic echocardiography and measurement of plasma NT-proBNP. Patients with diseases known to increase NT-proBNP were excluded. The crude plasma NT-proBNP (median; IQR) in AS patients (413; 165–1055 ng/l) was significantly higher compared to ASc patients (96; 53–237 ng/l, p < 0.001) and healthy controls (50; 29–76 ng/l, p < 0.001). After adjusting for the confounding factors (age, coronary artery disease, renal function and diastolic blood pressure), plasma NT-proBNP remained significantly higher in AS patients as compared to ASc (p < 0.002) and controls (p < 0.0001). In the receiver-operating characteristic curve for NT-proBNP to identify AS from ASc and controls, the area under the curve was 0.878 with optimal cutoff of 115 ng/l. In addition, using 115 ng/l to separate AS from ASc yielded sensitivity of 0.885, and negative predictive value of 0.808. NT-proBNP was sensitive to identify AS and useful to rule out AS in patients with systolic murmur in the left ventricular outflow tract provided the patient does not have coexisting disease known to impact NT-proBNP.
Magnetic Properties of 2-Dimensional Dipolar Squares: Boundary Geometry Dependence
Creators: name: Sugano, Ryoko
name: Matsushita, Katsuyoshi
name: Kuroda, Akiyoshi
name: Tomita, Yusuke
name: Takayama, Hajime
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: By means of the molecular dynamics simulation on gradual cooling processes, we investigate magnetic properties of classical spin systems only with the magnetic dipole-dipole interaction, which we call dipolar systems. Focusing on their finite-size effect, particularly their boundary geometry dependence, we study two finite dipolar squares cut out from a square lattice with $Φ=0$ and $π/4$, where $Φ$ is an angle between the direction of the lattice axis and that of the square boundary. Distinctly different results are obtained in the two dipolar squares. In the $Φ=0$ square, the ``from-edge-to-interior freezing'' of spins is observed. Its ground state has a multi-domain structure whose domains consist of the two among infinitely (continuously) degenerated Luttinger-Tisza (LT) ground-state orders on a bulk square lattice, i.e., the two antiferromagnetically aligned ferromagnetic chains (af-FMC) orders directed in parallel to the two lattice axes. In the $Φ=π/4$ square, on the other hand, the freezing starts from the interior of the square, and its ground state is nearly in a single domain with one of the two af-FMC orders. These geometry effects are argued to originate from the anisotropic nature of the dipole-dipole interaction which depends on the relative direction of sites in a real space of the interacting spins.
description: 21 pages, 13 figures, submitted to Journal of Physical Society Japan
Relativistic generalization of the Schrodinger-Newton model for the wavefunction reduction
Creators: name: Kassandrov, Vladimir V.
name: Markova, Nina V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Pattern Formation and Solitons (nlin.PS)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider the model of the self-gravity driven spontaneous wavefunction reduction proposed by L. Diosi, R. Penrose et al. and based on a self-consistent system of the Schrodinger and Poisson equations. An analogous system of coupled Dirac and Maxwell-like equations is proposed as a relativization. Regular solutions to the latter form a discrete spectrum in which all the "active" gravitational masses are always positive, and approximately equal to inertial masses and to the mass $m$ of the quanta of Dirac field up to the corrections of order $α^2$. Here $α=(m/M_{pl})^2$ is the gravitational analogue of the fine structure constant negligibly small for nucleons. In the limit $α\to 0$ the model reduces back to the nonrelativistic Schrodinger-Newton one. The equivalence principle is fulfilled with an extremely high precision. The above solutions correspond to various states of the same (free) particle rather than to different particles. These states possess a negligibly small difference in characteristics but essentially differ in the widths of the wavefunctions. For the ground state the latter is $α$ times larger the Compton length, so that a nucleon cannot be sufficiently localized to model the reduction process
description: 5 pages. Talk presented at the 10-th Friedmann Seminar (Saint-Petersburg, Russia, 2019)
Complete d-Band Dispersion and the Mobile Fermion Scale in NaxCoO2
Creators: name: Qian, D.
name: Wray, L.
name: Hsieh, D.
name: Viciu, L.
name: Cava, R. J.
name: Luo, J. L.
name: Wu, D.
name: Wang, N. L.
name: Hasan, M. Z.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We utilize fine-tuned polarization selection coupled with excitation-energy variation of photoelectron signal to image the \textit{complete d}-band dispersion relation in sodium cobaltates. A hybridization gap anticrossing is observed along the Brillouin zone corner and the full quasiparticle band is found to emerge as a many-body entity lacking a pure orbital polarization. At low dopings, the quasiparticle bandwidth (Fermion scale, many-body \textit{E$_F$} $\sim$ 0.25 eV) is found to be smaller than most known oxide metals. The low-lying density of states is found to be in agreement with bulk-sensitive thermodynamic measurements for nonmagnetic dopings where the 2D Luttinger theorem is also observed to be satisfied.
description: 4+ pages, 5 Figs
Μελέτη βιοενεργών ουσιών υψηλής διαιτητικής αξίας 24 λαχανικών:
Creators: name: Παπαϊωάννου, Ειρήνη Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: βιοενεργές ουσίες
ολική αντιοξειδωτική ικανότητα
λαχανικά
bioactive substances
total antioxidant capacity
vegetables

description: Στην παρούσα μελέτη, εξετάστηκαν 24 είδη λαχανικών ευρείας κατανάλωσης για την περιεκτικότητα τους σε συστατικά υψηλής διαιτητικής αξίας. Συγκεκριμένα προσδιορίστηκαν ποσοτικώς η ολική αντιοξειδωτική τους ικανότητα, το ασκορβικό οξύ ( βιταμίνη C ), οι περιεχόμενες ολικές φαινόλες καθώς και η χλωροφύλλη. Τα λαχανικά εκτός της πιπεριάς τύπου Φλωρίνης και της κίτρινης, πορτοκαλί και κόκκινης τύπου “καμπάνα” πιπεριάς, οι οποίες αγοράστηκαν από τοπικό κατάστημα μαναβικής, στο σύνολο τους προέρχονταν από καλλιέργειες στην περιοχή των Βασιλικών ( 26 km από τη Θεσσαλονίκη ).Το φυλλώδες τμήμα του σέλινου παρουσίασε την υψηλότερη αντιοξειδωτική ικανότητα ( 31,17 μmol I. Α. Ο/g ν. β. ). Η πιπεριά τύπου Φλωρίνης ήταν το πλουσιότερο λαχανικό σε βιταμίνη C ( 74,38 mg/100g ν. β. ) καθώς και σε ολικές φαινόλες ( 0,88 mg GAE/g ν. β. ). Χλωροφύλλη περιείχαν μόνο οχτώ από τα εξετασθέντα λαχανικά μεταξύ των οποίων την υψηλότερη περιεκτικότητα σημείωσαν ο άνηθος ( 1,24 mg/g ν. β. ), η ρόκα ( 1,02 mg/g ν. β. ), το φυλλώδες τμήμα του σέλινου ( 1,01 mg/g ν. β. ) και ο μαϊντανός ( 0,99 mg/g ν. β.). Τα αποτελέσματα που παρουσιάζονται σε αυτήν και σε παρεμφερείς μελέτες διαφέρουν ως συνέπεια των διαφορετικών μεθόδων εκχύλισης και προσδιορισμού των ενώσεων, που ερευνώνται. Ακόμα και στην περίπτωση ταύτισης των παραπάνω υπάρχει διαφορά λόγω ενδογενών και εξωγενών παραγόντων, που επηρεάζουν τα εξεταζόμενα φυτά.
description: In the present research, 24 vegetables commonly consumed, were tested for their content in bioactive substances of dietary value. More specific, total antioxidant components ( antioxidant activity ), ascorbic acid ( vitamin C ), total phenols and chlorophyll were quantitatively determined and valued. All vegetables tested were purchased from farmers in the region of Vasilika ( 26 km from Thessaloniki ) except the peppers type Florinis and the yellow, orange and red bell type of peppers, which were purchased from a local greengrocery. The foliar part of celery demonstrated the higher total antioxidant activity ( 31,17 μmol of ascorbic acid/g f. w. ). Τhe pepper type Florinis was the richest vegetable in ascorbic acid ( 74,38 mg/100g f. w ) and in total phenols ( 0,88 mg GAE/g f. w ). Only eight of the tested vegetables contained chlorophyll, with its higher concentration determined in dill ( 1,24 mg/g f. w. ), rocket ( 1,02 mg/g f. w. ), the foliar part of celery ( 1,01 mg/g f. w. ) and parsley ( 0,99 mg/g f. w. ).The results of this and other similar studies vary as a consequence of the different methods of extraction and determination employed. Even with identical methods, differences might be revealed due to different endogenous and exogenous factors that influence the plants.
On Drag Forces and Jet Quenching in Strongly Coupled Plasmas
Creators: name: Caceres, Elena
name: Guijosa, Alberto
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We compute the drag force experienced by a heavy quark that moves through plasma in a gauge theory whose dual description involves arbitrary metric and dilaton fields. As a concrete application, we consider the cascading gauge theory at temperatures high above the deconfining scale, where we obtain a drag force with a non-trivial velocity dependence. We compare our results with the jet-quenching parameter for the same theory, and find qualitative agreement between the two approaches. Conversely, we calculate the jet-quenching parameter for N=4 super-Yang-Mills with an R-charge density (or equivalently, a chemical potential), and compare our result with the corresponding drag force.
description: 12 pages, 1 figure; added references, minor changes
title: Health care for immigrants in the context of economic crisis
title: the perceptions and experiences of health professionals in Greece
titleType: Subtitle
Creators: name: Milionis, Charalampos
Publisher: name: Lancaster University
Year: 2019

description: Background: Greece, alongside other European countries, is facing constant immigration inflow. Rising immigration creates unprecedented pressures on local health systems. This situation is aggravated by the current circumstances of economic recession in Greece. Health professionals are at the coal face of health care, being in constant clinical contact with immigrants. This study explored Greek health professionals’ perspectives on, and experiences of, caring for the various categories of immigrants in the context of economic crisis. Methods: A theoretical framework, consisting of political and economic theories about the provision of health care and concepts of culturally competent care, served as a tool to explore and interpret issues in the provision of care to immigrants from health professionals’ perspective. A qualitative study was conducted based on 20 interviews with health workers of various professional identities and experiences who were practicing in public health care services in Attica and Central Greece. The participants were recruited via purposeful sampling. Interview data were analysed using thematic analysis. Results: Interviewees highlighted problems relating to the social status of immigrant populations, the impact of the current economic crisis, the existing legislation regulating access to health care and the utilisation of health services by immigrants. Reported organisational difficulties were related to health system deficiencies and shortfalls in culturally competent care. The participants’ accounts revealed problematic staff attitudes towards immigrants, cultural differences between staff and the immigrants they cared for, and failures in communication with immigrant patients. Measures to improve health care for immigrants are suggested. Conclusions: The provision of health services to immigrants is a challenging task. Problems were found to be interrelated and their effects determine health outcomes. Managing the identified problems with appropriate health policies and practices should be prioritised in order to protect both immigrants’ and non-immigrant public health.
Percolation Phenomena in Low and High Density Systems
Creators: name: Chayes, L.
name: Lebowitz, J. L.
name: Marinov, V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We consider the 2D quenched--disordered $q$--state Potts ferromagnets and show that at self--dual points any amalgamation of $q-1$ species will fail to percolate despite an overall (high) density of $1-q^{-1}$. Further, in the dilute bond version of these systems, if the system is just above threshold, then throughout the low temperature phase there is percolation of a single species despite a correspondingly small density. Finally, we demonstrate both phenomena in a single model by considering a ``perturbation'' of the dilute model that has a self--dual point. We also demonstrate that these phenomena occur, by a similar mechanism, in a simple coloring model invented by O. Häggström.
description: 26 pages, v2: some more details in the Appendix, fixed typographical errors and included references to physics literature (following referees suggestions)
Stable and Metastable Cosmic Strings in Heterotic M-Theory
Creators: name: Buchbinder, Evgeny I.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We address the question of finding stable and metastable cosmic strings in quasi-realistic heterotic M-theory compactifications with stabilized moduli. According to Polchinski's conjecture, the only stable strings in the absence of massless fields are Aharonov-Bohm strings. Such strings could potentially be created in heterotic compactifications as bound states of open membranes, five-branes wrapped on four-cycles and solitonic strings. However, in generic compactifications, the process of moduli stabilization can conflict production of Aharanov-Bohm strings. In this case, heterotic cosmic strings will have to be unstable under breakage on monopoles. We estimate the monopole masses and find that they are big enough so that the strings can be metastable with a sufficiently long lifetime. On the other hand, if we allow one or more axions to remain massless at low energies, stable global strings can be produced.
description: LaTeX, 26 pages, 1 figure, subsection added, references added
Diffraction by multipoles in a 5d2 rhenium double perovskite
Creators: name: Lovesey, S. W.
name: Khalyavin, D. D.
name: van der Laan, G.
name: Nilsen, G. J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: A recent polarized neutron diffraction experiment on the 5d2 rhenium double perovskite Ba2YReO6 held at a low temperature uncovered weak magnetic diffraction peaks. Data analysis inferred a significantly reduced Re dipole moment, and long-range order compatible with an antiferromagnet, non-collinear motif. To interpret the experimental findings, we present a model wavefunction for Re ions derived from the crystal field potential, Coulomb interaction, and spin-orbit coupling that fully respects the symmetry of the low-temperature ordered state. It is used to calculate in analytic form all multipole moments visible in neutron and resonance enhanced x-ray diffraction. A minimal model consistent with available neutron diffraction data predicts significant multipolar moments up to the hexadecapole, and, in particular, a dominant charge-like quadrupole moment. Calculated diffraction patterns embrace single crystal x-ray diffraction at the Re L-edge, and renewed neutron diffraction, to probe the presumed underlying multipolar order.
Subclinical hypothyroidism in pregnancy – assessment of offspring thyroid status and mitochondrial robustness to stress
Creators: name: Stryhn, Julie Kristine Guldberg
name: Larsen, Jacob
name: Pedersen, Palle Lyngsie
name: Gæde, Peter Haulund
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Neuroscience
subject: Physiology
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer

description: Subclinical hypothyroidism’s clinical implications on pregnancy are controversial. Consequently, thyrotropin (TSH) cutoff-values for pregnancy are continuously a subject for debate. In subclinical hypothyroidism, altered levels of thyroid hormones may affect mitochondrial function. Objectives were i) to analyze thyroid hormone levels in offspring of women with and without subclinical hypothyroidism ii) to analyze mitochondrial “robustness” in terms of MTG/TMRM ratio in pregnant women and their offspring in relation to thyroid function and iii) to perform differentiate analyses on different TSH thresholds to determine the importance of cutoff-values to results. Pregnant women were included by blood collections prior to a planned cesarean section, and cord samples were collected after delivery. Thyroid status (analyzed by Siemens Healthcare Diagnostics by an electrochemical luminescent immunoassay based on LOCI-technology) grouped the women and their offspring in euthyroid or subclinical hypothyroid, with groups established from previous recommended third-trimester cutoff-value (TSH > 3.0 mIU/L) and the recently recommended cutoff-value in Denmark (TSH > 3.7 mIU/L). Flow cytometric measurements of mitochondrial function in mononuclear blood cells with the fluorophores TetraMethylRhodamine Methyl Ester (TMRM) and Mitotracker Green (MTG) were used to evaluate mitochondrial robustness as the MTG/TMRM ratio. No significant differences in mitochondrial robustness between euthyroid and subclinical hypothyroid cohorts were observed, irrespective of TSH-cutoff applied. Maternal and cord MTG/TMRM ratios were positively correlated. Cord-TSH was elevated in subclinical hypothyroid offspring, independent of TSH cutoff applied. Cord-TSH was associated with maternal TSH-level, maternal smoking and cord arterial-pH.
Biological variation of plasma 25-Hydroxyvitamin D3, serum vitamin B12, folate and ferritin in Turkish healthy subject
Creators: name: Ozkanay, Hayat
name: Arslan, Fatma Demet
name: Narin, Figen
name: Koseoglu, Mehmet Hicri
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Biochemistry
subject: Medicine
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Hematology

description: Biological variation (BV) plays a crucial role in determining analytical performance specifications, assessing serial measurements of individuals, and establishing the use of population-based reference intervals. Our study aimed to calculate the BV and BV-based quality goals of 25-hydroxyvitamin D3 (25-OH D3), ferritin, folate and vitamin B12 tests. We included a total of 22 apparently healthy volunteers (9 women and 13 men) aged 18-55 years in the study that we conducted in Turkey. Blood samples were collected from the participants once a week for five weeks. Serum ferritin, folate and vitamin B12 levels were measured using immunochemical method, while plasma 25-OH D3 levels were determined using the high-performance liquid chromatography method. Analysis of variance (ANOVA) was used to estimate analytical variation(CVA), within-subject BV(CVI) and between-subject BV(CVG). The individuality index (II) and reference change value (RCV) were calculated based on these data. The CVI of 25-OH D3, ferritin, folate, and vitamin B12 were found to be 1.8% (0.6%-2.5%), 16.9% (14.4%-20.2%), 10.7% (9.2%-12.7%), and 8.6% (6.8%-10.5%), respectively. CVG were 44.2% (34.3%-69.9%), 132% (87.7%-238%), 19.4% (14.4%-28.8%), and 39.6% (29.8%-59.0%) for the same biomarkers, while CVA were 3.2% (2.81%-3.71%), 3.5% (3.1%-4.1%), 4.0% (3.5%-4.6%), and 7.5% (6.6%-8.6%), respectively. The II values for 25-OH D3, ferritin, folate, and vitamin B12 were calculated as 0.04, 0.13, 0.55, and 0.22, respectively. The RCV were 10.2%, 47.8%, 31.7%, and 31.6%, respectively. Because the tests analyzed in this study exhibit high individuality, RCV should be preferred rather than population-based reference ranges in clinical interpretation of results.
DAWIS, a Detection Algorithm with Wavelets for Intracluster light Studies
Creators: name: Ellien, A.
name: Slezak, E.
name: Martinet, N.
name: Durret, F.
name: Adami, C.
name: Gavazzi, R.
name: Rabaça, C. R.
name: Da Rocha, C.
name: Pereira, D. N. Epitácio
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Large amounts of deep optical images will be available in the near future, allowing statistically significant studies of low surface brightness structures such as intracluster light (ICL) in galaxy clusters. The detection of these structures requires efficient algorithms dedicated to this task, where traditional methods suffer difficulties. We present our new Detection Algorithm with Wavelets for Intracluster light Studies (DAWIS), developed and optimised for the detection of low surface brightness sources in images, in particular (but not limited to) ICL. DAWIS follows a multiresolution vision based on wavelet representation to detect sources, embedded in an iterative procedure called synthesis-by-analysis approach to restore the complete unmasked light distribution of these sources with very good quality. The algorithm is built so sources can be classified based on criteria depending on the analysis goal; we display in this work the case of ICL detection and the measurement of ICL fractions. We test the efficiency of DAWIS on 270 mock images of galaxy clusters with various ICL profiles and compare its efficiency to more traditional ICL detection methods such as the surface brightness threshold method. We also run DAWIS on a real galaxy cluster image, and compare the output to results obtained with previous multiscale analysis algorithms. We find in simulations that in average DAWIS is able to disentangle galaxy light from ICL more efficiently, and to detect a greater quantity of ICL flux due to the way it handles sky background noise. We also show that the ICL fraction, a metric used on a regular basis to characterise ICL, is subject to several measurement biases both on galaxies and ICL fluxes. In the real galaxy cluster image, DAWIS detects a faint and extended source with an absolute magnitude two orders brighter than previous multiscale methods.
description: 31 pages, 12 figures
Determination of the Neutrino Mass Hierarchy via the Phase of the Disappearance Oscillation Probability with a Monochromatic \barν_e Source
Creators: name: Minakata, Hisakazu
name: Nunokawa, Hiroshi
name: Parke, Stephen
name: Funchal, Renata Zukanovich
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The neutrino mass hierarchy can be determined, in principle, by measuring a phase in the disappearance oscillation probability in vacuum, without relying on the matter effect, using a single channel. This phase is not the same for the normal and inverted neutrino mass spectra. In this paper, we give a complete description and physics understanding of the method. The key feature of the method is to detect advancement (normal) or retardation (inverted) of the phase of the atmospheric-scale oscillation relative to the solar-scale oscillation. We then show that this method can be realized with the recently proposed resonant $\barν_{e}$ absorption reaction enhanced by Mössbauer effect. The unique feature of this setup is the ultra-monochromaticity of the observed \barν_{e}'s. Because of this feature the phase advancement or retardation of atmospheric-scale neutrino oscillation is detectable after 20 or more oscillations if the source and the target are made sufficiently compact in size. A quantitative estimate of the sensitivity to mass hierarchy resolution is given. We have also examined how a possible continuation of such experiment can be carried out in order also to achieve high precision (few %) determination of the solar-scale oscillation parameters Δm^2_{21} and θ_{12}.
description: 23 pages, 10 figures, final published version, title changed
Ultraluminous X-ray sources in Globular Clusters
Creators: name: Wiktorowicz, Grzegorz
name: Giersz, Mirek
name: Askar, Abbas
name: Hypki, Arkadiusz
name: Helstrom, Lucas
Publisher: name: arXiv
Year: 2025
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: This paper investigates the formation, populations, and evolutionary paths of UltraLuminous X-ray Sources (ULXs) within Globular Clusters (GCs). ULXs, characterised by their extreme X-ray luminosities, present a challenge to our understanding of accretion physics and compact object formation. While previous studies have largely focused on field populations, this research examines the unique environment of GCs, where dynamical interactions play a significant role. Using the MOCCA Monte Carlo code, we explore how dynamics influences ULX populations within these dense stellar clusters.
 Our findings reveal that dynamical processes, such as binary hardening and exchanges, can both facilitate and impede ULX formation in GCs. The study explores the impact of parameters including the initial binary fraction, tidal filling, and multiple stellar populations on the evolution of ULXs. We find that non-tidally filling clusters exhibit significantly larger ULX populations compared to tidally filling ones.
 The results indicate that the apparent scarcity of ULXs in GCs may be related to the older stellar populations of GCs relative to the field. Furthermore, the study identifies a population of "escaper" ULXs, which originate in GCs but are ejected and emit X-rays outside the cluster. These escapers may significantly contribute to the observed field ULX population.
description: 12 pages, 3 figures, published in A&A
Evolution Operators for Linearly Polarized Two-Killing Cosmological Models
Creators: name: G., J. Fernando Barbero
name: Vergel, Daniel Gómez
name: Villaseñor, Eduardo J. S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We give a general procedure to obtain non perturbative evolution operators in closed form for quantized linearly polarized two Killing vector reductions of general relativity with a cosmological interpretation. We study the representation of these operators in Fock spaces and discuss in detail the conditions leading to unitary evolutions.
description: Accepted for publication in Physical Review D
Οι λόγοι αναίρεσης των διατάξεων του άρθρου 559 αρ. 11 και 12 ΚΠολΔ:
Creators: name: Πυροβέτση, Έλλη Πέτρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: αναίρεση
απόδειξη
Άρειος Πάγος
appeal
evidence
Court of Appeal

description: Η εργασία ασχολείται με τη θεωρητική και νομολογιακή ανάλυση του αναιρετικού λόγου του άρθρου 559 αριθμός 11 ΚΠολΔ για την περίπτωση που το δικαστήριο έλαβε υπόψη του ανεπίτρεπτα αποδεικτικά μέσα, για την περίπτωση που το δικαστήριο παρά το νόμο έλαβε υπόψη του αποδεικτικά μέσα που οι διάδικοι δεν προσκόμισαν και για την περίπτωση που το δικαστήριο δεν έλαβε υπόψη του αποδεικτικά μέσα που οι διάδικοι προσκόμισαν και επικαλέστηκαν. Επίσης γίνεται θεωρητική και νομολογιακή ανάλυση του αναιρετικού λόγου του άρθρου 559 αριθμός 12 ΚΠολΔ για την περίπτωση παραβίασης των ορισμών του νόμου για τη δύναμη των αποδεικτικών μέσων.
description: This thesis is about the theoretical and jurisprudential analysis of the ground of appeal of the article 559 number 11 of the Greek Civil Procedure Law in the case that the court took into consideration illegal evidences, in the case that the court despite the law took into consideration evidences that the parties did not present and in the case that the court did not take into consideration the evidences that the parties presented and adduced. Furthermore, it takes place theoretical and jurisprudential analysis of the ground of appeal of the article 559 number 12 of the Greek Civil Procedure Law in the case of the violation of the law regulations about the force of the evidences.
How changing physical constants and violation of local position invariance may occur?
Creators: name: Flambaum, V. V.
name: Shuryak, E. V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Light scalar fields very naturally appear in modern cosmological models, affecting such parameters of Standard Model as electromagnetic fine structure constant $α$, dimensionless ratios of electron or quark mass to the QCD scale, $m_{e,q}/Λ_{QCD}$. Cosmological variations of these scalar fields should occur because of drastic changes of matter composition in Universe: the latest such event is rather recent (redshift $z\sim 0.5$), from matter to dark energy domination. In a two-brane model (we use as a pedagogical example) these modifications are due to changing distance to "the second brane", a massive companion of "our brane". Back from extra dimensions, massive bodies (stars or galaxies) can also affect physical constants. They have large scalar charge $Q_d$ proportional to number of particles which produces a Coulomb-like scalar field $ϕ=Q_d/r$. This leads to a variation of the fundamental constants proportional to the gravitational potential, e.g. $δα/ α= k_αδ(GM/ r c^2)$. We compare different manifestations of this effect. The strongest limits $k_α+0.17 k_e= (-3.5\pm 6) * 10^{-7}$ are obtained from the measurements of dependence of atomic frequencies on the distance from Sun (the distance varies due to the ellipticity of the Earth's orbit).
description: reference added
Color night vision correlation imaging without an infrared focal plane array
Creators: name: Duan, Deyang
name: Xia, Yunjie
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: Image and Video Processing (eess.IV)
subject: FOS: Physical sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Night vision is the ability to see in low-light conditions. However, conventional night vision imaging technology is limited by the requisite high-performance infrared focal plane array. In this article, we propose a novel scheme of color night vision imaging without the use of an infrared focal plane array. In the experimental device, the two-wavelength infrared laser beam reflected by the target is modulated by a spatial light modulator, and the output light is detected by a photomultiplier tube. Two infrared night vision images are reconstructed by measuring the second-order intensity correlation function between two light fields. Thus, the processing mode of optical electric detection in conventional night vision imaging is transformed into the processing mode of light field control. Furthermore, two gray images with different spectra are processed to form a color night vision image. We show that a high-quality color night vision image can be obtained by this method.
description: 5pages,5figures
Particle motion during the compaction of granular matter
Creators: name: Slotterback, Steven
name: Toiya, Masahiro
name: Goff, Leonard
name: Douglas, Jack F.
name: Losert, Wolfgang
Publisher: name: arXiv
Year: 2008
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We track particle motions in a granular material subjected to compaction using a laser scattering based imaging method where compaction is achieved through thermal cycling. Particle displacements in this jammed fluid correlate strongly with rearrangments of the Voronoi cells defining the local spatial partitioning about the particles, similar to previous observations of Rahman on cooled liquids. Our observations provide further evidence of commonalities between particle dynamics in granular matter close to jamming and supercooled liquids.
description: 4 pages, 6 Figures, to be submitted to PRL
Impact of RF I/Q Imbalance on Interference-Limited Mixed RF/FSO TWR Systems with Non-Zero Boresight Error
Creators: name: Upadhya, Abhijeet
name: Gupta, Juhi
name: Dwivedi, Vivek K.
name: Alouini, Mohamed-Slim
Publisher: name: arXiv
Year: 2020
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In this letter, we investigate a generic model assessing the effect of in-phase/quadrature-phase imbalance (IQI) on an asymmetric dual hop radio frequency/free space optical (RF/FSO) two-way relay (TWR) system in the presence of multiple co-channel interferers (CCIs) at the relay. The fading on the RF and FSO links have been modeled using K-distribution and double generalized Gamma (D-GG) turbulence model, respectively. The impact of non-zero boresight pointing error and type of optical demodulation schemes have been considered on the FSO link. To this end, a closed-form probability density function (PDF) has been derived for the FSO link undergoing D-GG irradiance with non-zero boresight pointing error. Furthermore, the exact and high signal-to-noise (SNR) asymptotic expression for outage probability have been presented. To gain insights into the throughput of the system, approximate and asymptotic expressions for the achievable sum rate (ASR) have been derived. The results show dependency of reliability and throughput offered on IQI at the RF front-end and strength of interference for the considered TWR system.
description: 13 Pages, 03 Figures
On the Kaluza-Klein geometrization of the Electro-Weak Model within a gauge theory of the 5-dimensional Lorentz group
Creators: name: Montani, Orchidea Maria Lecian Giovanni
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The geometrization of the Electro-Weak Model is achieved in a 5-dimensional Riemann-Cartan framework. Matter spinorial fields are extended to 5 dimensions by the choice of a proper dependence on the extra-coordinate and of a normalization factor. U(1) weak hyper-charge gauge fields are obtained from a Kaluza-Klein scheme, while the tetradic projections of the extra-dimensional contortion fields are interpreted as SU(2) weak isospin gauge fields. SU(2) generators are derived by the identification of the weak isospin current to the extra-dimensional current term in the Lagrangian density of the local Lorentz group. The geometrized U(1) and SU(2) groups will provide the proper transformation laws for bosonic and spinorial fields. Spin connections will be found to be purely Riemannian.
description: 21 pages, no figures, to appear on IJMPD
Biological variation of plasma 25-Hydroxyvitamin D3, Serum vitamin B12, folate and ferritin in Turkish healthy subject
Creators: name: Ozkanay, Hayat
name: Arslan, Fatma Demet
name: Narin, Figen
name: Koseoglu, Mehmet Hicri
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biochemistry
subject: Medicine
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Hematology

description: Biological variation (BV) plays a crucial role in determining analytical performance specifications, assessing serial measurements of individuals, and establishing the use of population-based reference intervals. Our study aimed to calculate the BV and BV-based quality goals of 25-hydroxyvitamin D3 (25-OH D3), ferritin, folate and vitamin B12 tests. We included a total of 22 apparently healthy volunteers (9 women and 13 men) aged 18-55 years in the study that we conducted in Turkey. Blood samples were collected from the participants once a week for five weeks. Serum ferritin, folate and vitamin B12 levels were measured using immunochemical method, while plasma 25-OH D3 levels were determined using the high-performance liquid chromatography method. Analysis of variance (ANOVA) was used to estimate analytical variation(CVA), within-subject BV(CVI) and between-subject BV(CVG). The individuality index (II) and reference change value (RCV) were calculated based on these data. The CVI of 25-OH D3, ferritin, folate, and vitamin B12 were found to be 1.8% (0.6%-2.5%), 16.9% (14.4%-20.2%), 10.7% (9.2%-12.7%), and 8.6% (6.8%-10.5%), respectively. CVG were 44.2% (34.3%-69.9%), 132% (87.7%-238%), 19.4% (14.4%-28.8%), and 39.6% (29.8%-59.0%) for the same biomarkers, while CVA were 3.2% (2.81%-3.71%), 3.5% (3.1%-4.1%), 4.0% (3.5%-4.6%), and 7.5% (6.6%-8.6%), respectively. The II values for 25-OH D3, ferritin, folate, and vitamin B12 were calculated as 0.04, 0.13, 0.55, and 0.22, respectively. The RCV were 10.2%, 47.8%, 31.7%, and 31.6%, respectively. Because the tests analyzed in this study exhibit high individuality, RCV should be preferred rather than population-based reference ranges in clinical interpretation of results.
Physics and evolution of the most massive stars in 30 Dor. Mass loss, envelope inflation, and a variable upper stellar mass limit
Creators: name: Gräfener, Götz
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The identification of stellar-mass black-hole mergers with up to 80 Msun as powerful sources of gravitational wave radiation led to increased interest in the physics of the most massive stars. The largest sample of possible progenitors of such objects, very massive stars (VMS) with masses up to 300 Msun, have been identified in the 30 Dor star-forming region in the Large Magellanic Cloud (LMC). The physics and evolution of VMS is highly uncertain, mainly due to their proximity to the Eddington limit. In this work we investigate the two most important effects that are thought to occur near the Eddington limit. Enhanced mass loss through optically thick winds, and the formation of radially inflated stellar envelopes. We compute evolutionary models for VMS at LMC metallicity and perform a population synthesis of the young stellar population in 30 Dor. We find that enhanced mass loss and envelope inflation have a dominant effect on the evolution of the most massive stars. While the observed mass-loss properties and the associated surface He-enrichment are well described by our new models, the observed O-star mass-loss rates are found to cover a much larger range than theoretically predicted, with particularly low mass-loss rates for the youngest objects. Also, the (rotational) surface enrichment in the O-star regime appears to be not well understood. The positions of the most massive stars in the Hertzsprung-Russell Diagram (HRD) are affected by mass loss and envelope inflation. For instance, the majority of luminous B-supergiants in 30 Dor, and the lack thereof at the highest luminosities, can be explained through the combination of envelope inflation and mass loss. Finally, we find that the upper limit for the inferred initial stellar masses in the greater 30 Dor region is significantly lower than in its central cluster R 136, implying a variable upper limit for the masses of stars.
description: 12 pages, 14 figures, accepted by A&A