bluuebunny/crossref_metadata_2025_split huggingface dataset:
NUCLEAR MOMENTUM DISTRIBUTION WITH FRACTIONAL OCCUPATION PROBABILITIES OF THE SURFACE ORBITS
Authors: Kosmas T. S. , Vergados J. D. 
Published: April 2020

Simplified expressions for calculating nucléon momentum distributions are derived in the context of the harmonic oscillator shell model and in its modification in which fractional occupation probabilities of the surface orbits are used. The method is applied to study the proton momentum distribution of the spherical nucleus 40Ca. The values of the partial occupation probabilities used had been previously determined by fitting to the experimental elastic form factor data.
K-SHELL IONIZATION AND X-RAY PRODUCTION CROSS SECTIONS BY PROTONS IN VACUUM AND GASEOUS ENVIRONMENT
Authors: Kallithrakas-Kontos N. , Katsanos A. A. 
Published: April 2020

The Κα ionization and x-ray production cross sections from the bombardment of three metal targets with protons were measured in vacuum and in gaseous environment (external beam technique). Proton energies between 1.5 and 8 MeV were used. The experimental Κ shell ionization and x-ray production cross sections were calculated for the same targets and com­ pared with three theoretical and two semiempirical approxima­ tions. For the measurements in gaseous environment the influ­ence of the secondary electrons (delta electrons) emitted from the gas, to the x-ray yields was investigated. For this pur­ pose a suitable model was introduced and tested experimen­tally.
SPECTROSCOPY IN A ROTATING DEFORMED NUCLEUS
Authors: Papadopoulos C. T. , Vlastou R. 
Published: April 2020

Recent advances in the physics of nuclei at high spin are presented. In particular the new phenomena observed by the latest generation of γ-rays spectrometers are discussed. An overview of experimental and theoretical treatment of "backbending·'' effect, quasiparticle alignment and band crossing is described in more detail. The outlines of the Cranked Shell Model, which is a successful framework for the interpretation of experimental data, are also reported.
PHENOMENOLOGICAL RELATIVISTIC STUDY OF THE ENERGY OF Α Λ IN ITS GROUND AND EXCITED STATES IN HYPERNUCLEI
Authors: Papadopoulos G. J. , Koutroulos C. G. , Grypeos M. E. 
Published: April 2020

The binding energy B_Λ of a Λ-particle in hypernuclei is studied by means of the Dirac equation containing attractive and repulsive potentials of orthogonal shapes. The energy eigenvalue equation in this case is obtained analytically for every bound state. An attempt is also made to investigate the possibility of deriving in particular cases approximate ana­lytic expressions for B_Λ.
Strong interaction effects in Σ- atoms
Authors: Petridou Th. 
Published: April 2020

An approximation is made for the Σ- atomic energy shifts and widths due to strong interaction central and spin-orbit parts of the potential with the use of the S-Matrix Approach, introduced by DelofF. This simplified model is applied in 12C_Σ in connection with the Σ-hypernuclear data: 12C_Σ. It is concluded that there is an essential influence of the strong interaction and especially of the nuclear spin-orbit coupling in the spectra of Σ-12C, mainly for the p-shell.
Parametrization of the effective potential in sodium clusters
Authors: Kotsos B. A. , Grypeos M. E. 
Published: April 2020

The effective radial electronic potentials for neutral sodium clus­ters determined by the local density approximation and the jellium model are parametrized by means οf (symmetrized) Woods-Saxon and "Wine-Bottle" symmetrized Woods-Saxon potentials. The potential parameters are deter­ mined by various least-squares fitting procedures. Particular attention is paid to the dependence of the radius parameter R on the particle number Ν and it is realized that for relatively smaller values of N, complex expressions of R as a function of N, are more appropriate than the standard one R = r_0N^{1/3}. It is also found that improved results in these cases are obtained with an expression, of the form R = r_0N^{1/3} + 6, which is still very simple.
Inclusive neutrino-nucleus reaction cross sections at intermediate energies
Authors: Kosmas T. S. , Oset E. 
Published: April 2020

Inclusive neutrino-nucleus reaction cross sections at intermediate energies (20 MeV < Ey < 500 MeV) are calculated throughout the periodic table for the most interesting nu­ clei from an experimental point of view. The method used had previously proved to be very accurate in calculating the induced reaction cross section for T=0 light nuclei (12C and 16O) and in the study of other similar processes like the ordinary muon capture. The electron-neutrino (ve) cross section weighted by the Michel distribution is also discussed in conjuction with the existing experimental results at LAMPF and ΚARMEN.
Shell model calculations in the A=90-98 mass region. A study of the N=51. nuclei
Authors: Divari P. , Skouras L. D. 
Published: April 2020

The properties of nuclei with 39 < Ζ < 47 and N=51 are investigated in large scale shell-model calculations. The doubly closed nucleus 100Sn is selected as the reference state and the nuclei under examination are described in terms of proton holes and a single neutron outside the inert core. The proton holes are distributed in a model space consisting of the orbitals g9/2, p1/2, p3/2 while f5/2 is sometimes also considerd. Similary the model space for the single neutron includes the orbitals g7/2, d5/2, d3/2, s1/2 and in certain cases h11/2. The effective two-body interaction and the matrix elements of the effective operators were determined by introducing second-order correctios to the Sussex matrix elements. The single proton holes as well as the single-neutron energies were treated as parameters which were determined by least-squares fit to the observed levels of 39 < Ζ < 47, N=50 and Ν=51 respectively. The results of the calculation were found to be in satisfactory agreement with experimental data and this enable us to make predictions about the properties of some exotic nuclei in the vicinity of 100Sn.
High-spin phenomena in 194Hg
Authors: Fotiades N. , Et al. - 
Published: April 2020

High-spin states in the isotope 194Hg were populated using the 150Nd(40Ca,4n) reaction at a beam energy of 213 MeV. The analysis of γ-γ coincidences, which were detected using the EUROGAM detector array, has revealed two new structures at excitation energies above 6 MeV and at moderate spin. The first one could be interpreted as a manifestation of a band termination phenomenon while the second one is associated with a single-particle decay mode.
Materials analysis by ion channeling at "Demokritos"
Authors: Harissopulos S. , Kossionides S. , Paradellis T. , Maggiore G. 
Published: April 2020

A new fully automated Goniometer system installed recently at the Institute of Nuclear Physics of "Demokritos" is presented. This system enables to perform materials analysis not only via the Rutherford Backscattering method, which has been used so far at "Demokritos", but also by the ion channeling technique. The first experiments carried out using the Goniometer are also presented.
Assessment of arrangements for the detection of radon emanating from soil
Authors: Papachristodoulou C. A. , Ioannides K. G. , Mertzimekis T. J. , Karamanis D. T. , Stamoulis K. C. 
Published: April 2020

CR-39 solid state nuclear track detectors were used to measure radon (222Rn) concentration in the soil near ground surface. The measurements were performed in the campus of the University of Ioannina, using PVC tubes at 0.25 m intervals down to depths of 1.25 m. The track detectors were etched in 7N NaOH solutions at 80°C. The tracks were counted using a microscope - camera - computer system, developed for automatic counting. The results provide evidence for the non-diffusive transport of radon in soils. A transport length of (46.9 ± 3.2) cm was estimated for radon transport near ground surface. Also the variation of soil's radon was correlated to meteorological variations.
Environmental study of natural radioactivity regime of the Ikaria island and the radiological impact
Authors: Trabidou G. , Florou H. , Angelopoulos A. , Sakelliou L. , Katsikis I. 
Published: April 2020

This is a preliminary study on the natural radioactivity of the spas in the Icaria island and the consequent impact to the public health. In order to carry out this research : a) Car-borne radiometry has been applied in the areas around the spas as well as in some reference areas in the island b) The activity concentrations of the natural radionuclides of the 238U-226Ra and 232Th decay series, as well as 40K, in spa water, soil, sediment, surface sea water and marine flora samples in the areas of the spas were measured, from the results derived one notes that elevated concentrations of the environmental abiotic materials are presented, which are reflected to the concentrations observed in marine flora. Consequently, higher population doses in comparison with other Greek regions are resulted.
Simulations of Fragment Correlations in the Disintegration of Non-Compact Nuclear Configurations
Authors: Nicolis N. G. 
Published: April 2020

Non-spherical and hollow nuclear configurations have been predicted for intermediate-energy heavy-ion collisions. We have developed a simulation of the emitted heavy fragments in order to establish observables indicative of non-spherical break-up geometries. Starting with a spherical, bubble, spheroidal or a toroidal freeze-out volume configuration, a primary fragment distribution is defined with a given radial collective energy, thermal momentum distribution and intrinsic excitation energy. The outgoing fragments are allowed to propagate along their Coulomb trajectories in a self-consistent manner. Account is taken of the de-excitation of the primary fragments by nucléon and cluster evaporation. Considering 5-fragment partitions, azimuthal distributions and two-fragment correlation functions are constructed and discussed in connection with their associated break-up geometries.
The Role of Λ-Effective Mass in a Phenomenological Analysis of the Λ-Energy in Hypernuclei
Authors: Efthimiou C. A. , Grypeos M. E. , Koutroulos C. G. 
Published: April 2020

A preliminary account is given of an effort undertaken to allow for the effective mass of the Λ-particle in a phenomenological analysis of existing experimental data for the (ground state) energy of the Λ : EΛ in hypernuclei. The non - relativistic treatment is adopted to describe the motion of the Λ - particle, by considering a central potential well V (r), formed by the nuclear "host" medium of the Λ in the hypernucleus. The Λ - effective mass in the medium is taken to be an r-dependent effective mass mΛ(r) representing approximately some non-local effects in a way suggested in the past. Certain preliminary numerical results are obtained and discussed.
Optimisation and standardisation of a multiplex immunoassay of diverse Plasmodium falciparum antigens to assess changes in malaria transmission using sero-epidemiology
Authors: Wu Lindsey , Hall Tom , Ssewanyana Isaac , Oulton Tate , Patterson Catriona , Vasileva Hristina , Singh Susheel , Affara Muna , Mwesigwa Julia , Correa Simon , Bah Mamadou , D'Alessandro Umberto , Sepúlveda Nuno , Drakeley Chris , Tetteh Kevin K A 
Published: April 2020

Background: Antibody responses have been used to characterise transmission and exposure history in malaria-endemic settings for over a decade. Such studies have typically been conducted on well-standardised enzyme-linked immunosorbent assays (ELISAs). However, recently developed quantitative suspension array technologies (qSAT) are now capable of high-throughput and multiplexed screening of up to hundreds of analytes at a time. This study presents a customised protocol for the Luminex MAGPIX© qSAT using a diverse set of malaria antigens. The aim is to develop a standardised assay for routine serological surveillance that is implementable across laboratories and epidemiological settings. Methods: A panel of eight Plasmodium falciparum recombinant antigens, associated with long- and short-lived antibody responses, was designed for the Luminex MAGPIX© platform. The assay was optimised for key steps in the protocol: antigen-bead coupling concentration, buffer composition, serum sample dilution, and bead storage conditions. Quality control procedures and data normalisation methods were developed to address high-throughput assay processing. Antigen-specific limits of quantification (LOQs) were also estimated using both in-house and WHO reference serum as positive controls. Results: Antigen-specific bead coupling was optimised across five serum dilutions and two positive controls, resulting in concentrations operational within stable analytical ranges. Coupled beads were stable after storage at room temperature (22⁰C) for up to eight weeks. High sensitivity and specificity for distinguishing positive and negative controls at serum sample dilutions of 1:500 (AUC 0.94 95%CI 0.91-0.96) and 1:1000 (AUC 0.96 95%CI 0.94-0.98) were observed. LOQs were also successfully estimated for all analytes but varied by antigen and positive control. Conclusions: This study demonstrates that developing a standardised malaria-specific qSAT protocol for a diverse set of antigens is achievable, though further optimisations may be required. Quality control and data standardisation methods may also be useful for future analysis of large sero-epidemiological surveys.
Ultrasound-detected venous changes associated with peripheral intravenous placement in children
Authors: Goel Dewansh , Smitthimedhin Anilawan , Yadav Bhupender , Vellody Ranjith , Lele Meenal , Meagher Elisabeth , Yarmolenko Pavel , Sharma Karun V. 
Published: April 2020

HIGHLIGHTS Ultrasound shows several venous changes in pediatric PIV-containing veins. Changes were visualized by ultrasound in the absence of physical exam findings. Venous luminal narrowing, wall thickening, and thrombosis may explain PIV failure. Background: Peripheral intravenous catheters (PIVs) are routinely used for venous access in hospitalized pediatric patients to administer fluids and medications and to aspirate blood. Unfortunately, PIVs do not remain functional for the entire duration of intravascular need. We hypothesized that PIV malfunction may be related to venous changes that can be visualized with ultrasound (US) imaging. The purpose of this study was to describe and document such changes in pediatric patients. Methods: This Institutional Review Board-approved study was performed at a tertiary pediatric medical center. Patients underwent US scans of their PIV-containing veins, documenting venous characteristics such as depth, diameter, wall thickness, blood flow, valves, branch points, and presence of thrombus. Patient demographics and PIV characteristics were also recorded. Results: Data from 30 patients including 12 males and 18 females with a mean age of 11 years were analyzed. Mean venous depth and diameter were 2.07 ± 0.13 and 2.02 ± 0.18 mm, respectively. Mean PIV dwell time at time of evaluation was 3.3 days. PIV-associated venous changes were seen in 73% of accessed veins and included lumen narrowing (47%), wall thickening (33%), presence of thrombus (20%), and absence of blood flow around the PIV tip (40%). Conclusion: PIV-associated venous changes are seen with US in the majority of pediatric patients with indwelling PIVs but are not necessarily appreciated on physical exam. These changes may help explain the high rate of pediatric PIV device failure. Given the small sample size, further investigation is needed to better characterize PIV-associated venous changes in children.
Nota Prévia
Authors: Moniz Gonçalo Canto , Figueira Jorge 
Published: April 2020

O número 4 da revista de cultura arquitectónica joelho aborda o problema do ensino da arquitectura a partir das reflexões realizadas no colóquio internacional “Ensinar pelo Projecto”, que teve lugar no Colégio das Artes nos dias 27, 28 e 29 de Setembro de 2012.
Esta iniciativa foi promovida pelo Departamento de Arquitectura e pelo Centro de Estudos Sociais, com o objectivo de conciliar a abordagem pedagógica com a pesquisa em métodos de ensino.
Regards croisés de mères, de donneurs et d’enfants de familles lesboparentales en France
Authors: Côté Isabel , Gross Martine , Lavoie Kévin , Chamberland Line 
Published: April 2020

En France, la plupart des mères lesbiennes se tournent vers la procréation médicalement assistée (PMA) pour fonder une famille. Un certain nombre d’entre elles ont cependant recours à un « donneur connu », c’est-à-dire un homme de leur entourage qui accepte de faire un don pour les aider à devenir mères sans pour autant revendiquer une paternité légale. Cet article explore cette configuration familiale en documentant les relations entretenues entre les mères lesbiennes, leur donneur, mais également les enfants issus de ses dons. Quatre rôles endossés par le donneur se dégagent en fonction de la proximité établie avec les mères et de la relation entretenue ou non avec l’enfant au fil du temps : 1) une « quasi » coparentalité planifiée ; 2) un donneur considéré comme un père par une partie de la famille ; 3) un donneur « proche » ou 4) un donneur « distant », voire inconnu.
Etnicidad y corporalidad en comunidades de la Huasteca Potosina: el Trazol y Dhiman talab
Authors: López Millán Minerva 
Published: April 2020

El objetivo de este artículo es describir y comparar dos dinámicas relacionales que tienen una manifestación y tratamiento corporal: el trazol y dhiman talab (ser brujeado), en siete comunidades de la Huasteca potosina.
La investigación es etnográfica, iniciada desde 2012 en comunidades distribuidas al sur de Tamuín, San Vicente Tancuayalab y Tanlajás. La ponencia se estructura en tres apartados: en el primero se introduce de manera general una aportación de David Le Breton (1995) sobre antropología del cuerpo para enmarcar el caso del trazol y de dhiman talab.
Con base en un trabajo previo (en prensa a) destinado a explorar las concepciones del mal en una comunidad de Tamuín, en la segunda sección explicaré por qué definí al trazol como el mal que a todos hace iguales. El último apartado está dedicado al “temor a ser brujeado” (dhiman talab), lo trata un especialista ritual y tiene implicaciones sociales para conservar la lealtad y lazos de cohesión entre los propios de San Francisco Cuayalab, principalmente. En la comparación final se destacará que ambas fenomenologías corporales tienen diferente expresión en cuanto a relación de etnicidad entre los habitantes en una de las comunidades, y al mismo tiempo constituyen un regulador para hacer frente a problemas de desigualdad social.
Enhancing the Fresh and Hardened Properties of the Early Age Concrete Modified with Powder Polymers and Characterized Using Different Models
Authors: Burhan Lajan , Ghafor Kawan , Mohammed Ahmed 
Published: April 2020

Abstract
This study focuses on the effect of three types of powder polymer (polycarboxylate superplasticizer) in term of setting time of cement, workability, density, and compressive strength of concrete until 28 days of curing. The percentage of the polymer ranged between 0 to 0.25 % (by dry weight of cement). Slump and compressive strength results of concrete modified with polymers were compared with the fresh and hardened properties of cement replacement with silica fume (SF) used in the literature. Based on the statistical analysis, the range of SF used in different research studies varied between 0 and 25 %. The initial water-to-cement ratio (w/c) was 0.60 and decreased gradually to 0.46 with an increase in the polymer contents. The compressive strength of concrete modified with only 0.25 % of polymers increased by 24 to 97 % based on the types of polymer, polymer content, w/c, and curing time. A nonlinear model (NLM) was used to model the compressive strength of concrete modified with three types of the polymer and SF; the compressive strength of modified concrete was modeled as a function of polymer content, w/c, and time of curing. Based on the NLM parameters, it was found that the polymers are more effective than SF in improving the workability and compressive strength of concrete.
In Vivo Visual Screen for Dopaminergic Rab ↔ LRRK2-G2019S Interactions in Drosophila Discriminates Rab10 from Rab3
Authors: Petridi Stavroula , Middleton C Adam , Ugbode Chris , Fellgett Alison , Covill Laura , Elliott Christopher J H 
Published: April 2020

Abstract
LRRK2 mutations cause Parkinson’s, but the molecular link from increased kinase activity to pathological neurodegeneration remains undetermined. Previous in vitro assays indicate that LRRK2 substrates include at least 8 Rab GTPases. We have now examined this hypothesis in vivo in a functional, electroretinogram screen, expressing each Rab with/without LRRK2-G2019S in selected Drosophila dopaminergic neurons. Our screen discriminated Rab10 from Rab3. The strongest Rab/LRRK2-G2019S interaction is with Rab10; the weakest with Rab3. Rab10 is expressed in a different set of dopaminergic neurons from Rab3. Thus, anatomical and physiological patterns of Rab10 are related. We conclude that Rab10 is a valid substrate of LRRK2 in dopaminergic neurons in vivo. We propose that variations in Rab expression contribute to differences in the rate of neurodegeneration recorded in different dopaminergic nuclei in Parkinson’s.
Levels of Heterochiasmy DuringArabidopsisDevelopment as Reported by Fluorescent Tagged Lines
Authors: Saini Ramswaroop , Singh Amit Kumar , Hyde Geoffrey J , Baskar Ramamurthy 
Published: April 2020

AbstractCrossing over, the exchange of DNA between the chromosomes during meiosis, contributes significantly to genetic variation. The rate of crossovers (CO) varies depending upon the taxon, population, age, external conditions, and also, sometimes, between the sexes, a phenomenon called heterochiasmy. In the model plant Arabidopsis thaliana, the male rate of all crossover events (mCO) is typically nearly double the female rate (fCO). A previous, PCR-based genotyping study has reported that the disparity decreases with increasing parental age, because fCO rises while mCO remains stable. We revisited this topic using a fluorescent tagged lines approach to examine how heterochiasmy responded to parental age in eight genomic intervals distributed across the organism’s five chromosomes. We determined recombination frequency for, on average, more than 2000 seeds, for each interval, for each of four age groups, to estimate sex-specific CO rates. mCO did not change with age, as reported previously, but, here, fCO did not rise, and thus the levels of heterochiasmy were unchanged. We can see no methodological reason to doubt that our results reflect the underlying biology of the accessions we studied. The lack of response to age could perhaps be due to previously reported variation in CO rate among accessions of Arabidopsis.