bluuebunny/crossref_metadata_2025 huggingface dataset:
ALMA Observations of Giant Molecular Clouds in M33. I. Resolving Star Formation Activities in the Giant Molecular Filaments Possibly Formed by a Spiral Shock
Authors: Tokuda Kazuki , Muraoka Kazuyuki , Kondo Hiroshi , Nishimura Atsushi , Tosaki Tomoka , Zahorecz Sarolta , Onodera Sachiko , Miura Rie E. , Torii Kazufumi , Kuno Nario , Fujita Shinji , Sano Hidetoshi , Onishi Toshikazu , Saigo Kazuya , Fukui Yasuo , Kawamura Akiko , Tachihara Kengo
Published: June 2020

We report molecular line and continuum observations toward one of the most massive giant molecular clouds (GMCs), GMC-16, in M33 using ALMA with an angular resolution of 0.″44 × 0.″27 (∼2 pc × 1 pc). We have found that the GMC is composed of several filamentary structures in 12CO and 13CO(J = 2–1). The typical length, width, and total mass are ∼50–70 pc, ∼5–6 pc, and ∼105
M
⊙, respectively, which are consistent with those of giant molecular filaments (GMFs) as seen in the Galactic GMCs. The elongations of the GMFs are roughly perpendicular to the direction of the galaxy’s rotation, and several H ii regions are located at the downstream side relative to the filaments with an offset of ∼10–20 pc. These observational results indicate that the GMFs are considered to be produced by a galactic spiral shock. The 1.3 mm continuum and C18O(J = 2–1) observations detected a dense clump with the size of ∼2 pc at the intersection of several filamentary clouds, which is referred to as the “hub filament,” possibly formed by a cloud–cloud collision. A strong candidate for protostellar outflow in M33 has also been identified at the center of the clump. We have successfully resolved the parsec-scale local star formation activity in which the galactic scale kinematics may induce the formation of the parental filamentary clouds.
A Detailed View of the Circumstellar Environment and Disk of the Forming O-star AFGL 4176
Authors: Johnston Katharine G. , Hoare Melvin G. , Beuther Henrik , Linz Hendrik , Boley Paul , Kuiper Rolf , Kee Nathaniel Dylan , Robitaille Thomas P.
Published: June 2020

We present a detailed analysis of the disk and circumstellar environment of the forming O-type star AFGL 4176 mm1, placing results from the Atacama Large Millimeter/submillimeter Array (ALMA) into context with multiwavelength data. With ALMA, we detect seventeen 1.2 mm continuum sources within 5″ (21,000 au) of AFGL 4176 mm1. We find that mm1 has a spectral index of 3.4 ± 0.2 across the ALMA band, with >87% of its 1.2 mm continuum emission from dust. The source mm2, projected 4200 au from mm1, may be a companion or a blueshifted knot in a jet. We also explore the morphological differences between the molecular lines detected with ALMA, finding 203 lines from 25 molecules, which we categorize into several morphological types. Our results show that AFGL 4176 mm1 provides an example of a forming O-star with a large and chemically complex disk, which is mainly traced by nitrogen-bearing molecules. Lines that show strong emission on the blueshifted side of the disk are predominantly oxygen-bearing, which we suggest are tracing a disk accretion shock. The molecules C34S, H2CS, and CH3CCN trace a slow wide-angle wind or dense structures in the outflow cavity walls. With the Australia Telescope Compact Array (ATCA), we detect a compact continuum source (<2000 × 760 au) at 1.2 cm, associated with mm1, of which >96% is from ionized gas. The ATCA NH3(1, 1) and (2, 2) emission traces a large-scale (r ∼ 0.5 pc) rotating toroid with the disk source mm1 in the blueshifted part of this structure offset to the northwest.
On the Formation of SS433
Authors: Han Qin , Li Xiang-Dong
Published: June 2020

SS433 is an extraordinary X-ray binary that is ejecting bipolar jets at 26% the speed of light. Associated with the supernova-like shell W50, SS433 is also probably one of the youngest X-ray binaries with an age of ≲105 yr. However, the masses of the two components in SS433 and even the nature of the compact object are still under debate. In this work, assuming that the compact object is a black hole, we employ a binary population synthesis method to study the formation of SS433. We use previous estimates of the age of W50 and the duration of the jet activity to constrain the evolutionary history. Our calculations suggest that SS433 likely harbored a Hertzsprung gap star at the beginning of the current Roche-lobe overflow phase. The masses of the black hole and the optical/donor star in SS433 suggested by the simulations are around 8 M
☉ and 24 M
☉, respectively. Future measurement of the donor mass and radius can help infer not only the origin of the binary but also the nature of the nebula W50.
A Rapidly Varying Red Supergiant X-Ray Binary in the Galactic Center
Authors: Gottlieb Amy M. , Eikenberry Stephen S. , Ackley Kendall , DeWitt Curtis , Marco Amparo
Published: June 2020

We analyzed multiwavelength observations of the previously identified Galactic center X-ray binary CXO 174528.79–290942.8 (XID 6592) and determine that the near-infrared counterpart is a red supergiant based on its spectrum and luminosity. Scutum X-1 is the only previously known X-ray binary with a red supergiant donor star and closely resembles XID 6592 in terms of X-ray luminosity (L
X), absolute magnitude, and IR variability (L
IR,var), supporting the conclusion that XID 6592 contains a red supergiant donor star. The XID 6592 infrared counterpart shows variability of ∼0.5 mag in the Wide-field Infrared Survey Explorer-1 band (3.4 μm) on timescales of a few hours. Other infrared data sets also show large-amplitude variability from this source at earlier epochs but do not show significant variability in recent data. We do not expect red supergiants to vary by ∼50% in luminosity over these short timescales, indicating that the variability should be powered by the compact object. However, the X-ray luminosity of this system is typically ∼1000× less than the variable luminosity in the infrared and falls below the Chandra detection limit. While X-ray reprocessing can produce large-amplitude fast infrared variability, it typically requires

L
IR,var to do so, indicating that another process must be at work. We suggest that this system may be a supergiant fast X-ray transient (SFXT), and that a large (∼1038 ergs s−1), fast (102-4 s) X-ray flare could explain the rapid IR variability and lack of a long-lasting X-ray outburst detection. SFXTs are normally associated with blue supergiant companions, so if confirmed, XID 6592 would be the first red supergiant SFXT, as well as the second X-ray red supergiant binary.
Sensitivity of the Atmospheric Water Cycle within the Habitable Zone of a Tidally Locked, Earth-like Exoplanet
Authors: Labonté Marie-Pier , Merlis Timothy M.
Published: June 2020

Synchronously orbiting, tidally locked exoplanets with a dayside facing their star and a permanently dark nightside orbiting dim stars are prime candidates for habitability. Simulations of these planets often show the potential to maintain an Earth-like climate with a complete hydrological cycle. Here we examine the sensitivity of the atmospheric water cycle to changes in stellar flux and describe the main underlying mechanisms. In a slowly rotating, tidally locked Earth-like atmospheric model, the response to a small (about 10%) increase in stellar irradiance from a habitable zone control simulation is examined. The water cycle is enhanced in response to the increased stellar irradiance. While the evaporation increase behaves similarly to the stellar radiation increase, the day-to-night energy transport by the mean circulation is critical to the planet's precipitation changes. Increased efficiency of the energy transport in a warmer climate shapes the substellar precipitation increase. On the nightside, precipitation changes are weak as a result of the large cancellation between the increased energy transport and the increased longwave emission. The day-to-night energy transport efficiency is sensitive to the variation of the atmosphere's vertical stratification. Due to weak temperature gradients in the upper troposphere and a moist adiabat maintained in the substellar region, variations in the substellar surface temperature and specific humidity govern the increase of the planet’s stratification with warming. This suggests a scaling of the nightside’s precipitation based on the substellar surface thermodynamic changes, a sensitivity that holds over a wider range of stellar irradiance changes.
The AREPO Public Code Release
Authors: Weinberger Rainer , Springel Volker , Pakmor Rüdiger
Published: June 2020

We introduce the public version of the cosmological magnetohydrodynamical moving-mesh simulation code Arepo. This version contains a finite-volume magnetohydrodynamics algorithm on an unstructured, dynamic Voronoi tessellation coupled to a tree-particle-mesh algorithm for the Poisson equation either on a Newtonian or cosmologically expanding spacetime. Time integration is performed adopting local time step constraints for each cell individually, solving the fluxes only across active interfaces, and calculating gravitational forces only between active particles, using an operator-splitting approach. This allows simulations with high dynamic range to be performed efficiently. Arepo is a massively distributed-memory parallel code, using the message passing interface (MPI) communication standard and employing a dynamical workload and memory balancing scheme to allow for optimal use of multi-node parallel computers. The employed parallelization algorithms of Arepo are deterministic and produce binary-identical results when rerun on the same machine and with the same number of MPI ranks. A simple primordial cooling and star formation model is included as an example of sub-resolution models commonly used in simulations of galaxy formation. Arepo also contains a suite of computationally inexpensive test problems, ranging from idealized tests for automated code verification to scaled-down versions of cosmological galaxy formation simulations, and is extensively documented in order to assist adoption of the code by new scientific users.
THOR 2.0: Major Improvements to the Open-source General Circulation Model
Authors: Deitrick Russell , Mendonça João M. , Schroffenegger Urs , Grimm Simon L. , Tsai Shang-Min , Heng Kevin
Published: June 2020

THOR is the first open-source general circulation model (GCM) developed from scratch to study the atmospheres and climates of exoplanets, free from Earth- or solar-system-centric tunings. It solves the general nonhydrostatic Euler equations (instead of the primitive equations) on a sphere using the icosahedral grid. In the current study, we report major upgrades to THOR, building on the work of Mendonça et al. First, while the horizontally explicit and vertically implicit integration scheme is the same as that described in Mendonça et al., we provide a clearer description of the scheme and improve its implementation in the code. The differences in implementation between the hydrostatic shallow, quasi-hydrostatic deep, and nonhydrostatic deep treatments are fully detailed. Second, standard physics modules are added: two-stream, double-gray radiative transfer and dry convective adjustment. Third, THOR is tested on additional benchmarks: tidally locked Earth, deep hot Jupiter, acoustic wave, and gravity wave. Fourth, we report that differences between the hydrostatic and nonhydrostatic simulations are negligible in the Earth case but pronounced in the hot Jupiter case. Finally, the effects of the so-called “sponge layer,” a form of drag implemented in most GCMs to provide numerical stability, are examined. Overall, these upgrades have improved the flexibility, user-friendliness, and stability of THOR.
Checklist of the parasites of European eel Anguilla anguilla (Linnaeus, 1758) (Anguillidae) in Poland
Authors: Dzido Joanna , Rolbiecki Leszek , Izdebska Joanna , Bednarek Rafał
Published: June 2020

The present paper lists all parasite species of the European eelAnguilla anguilla(Linnaeus, 1758), recorded in Poland, in both its saltwater and freshwater habitats. The list has been drawn up, based on data acquired since 1844. The majority of included parasite species are presented with fish infection parameters together with data on their developmental stages and occupied microhabitats, localities and dates of collection of the eels themselves. The database includes 62 parasite taxa (including 50 species, nine identified to the genus level and three to higher taxa), representing at least 47 genera and 39 families. The most frequently-noted parasites of the European eel are the cestodeBothriocephalus claviceps, the nematodesAnguillicoloides crassus,Camallanus lacustrisandRaphidascaris acusand the acanthocephalanAcanthocephalus lucii. Four alien species have been noted from this host:A. crassus, the monogeneansPseudodactylogyrus anguillaeandPseudodactylogyrus biniand the acanthocephalanParatenuisentis ambiguus. The present list includes both new host records and earlier records not included in previous lists of parasites of eels.
Biologer: an open platform for collecting biodiversity data
Authors: Popović Miloš , Vasić Nikola , Koren Toni , Burić Ivona , Živanović Nenad , Kulijer Dejan , Golubović Ana
Published: June 2020

We have developed a new platform named "Biologer" intended for recording species observations in the field (but also from literature resources and collections). The platform is created as user-friendly, open source, multilingual software that is compatible with Darwin Core standard and accompanied by a simple Android application. It is made from the user’s perspective, allowing everyone to choose how they share the data. Project team members are delegated by involved organisations. The team is responsible for development of the platform, while local Biologer communities are engaged in data collection and verification.

Biologer has been online and available for use in Serbia since 2018 and was soon adopted in Croatia and Bosnia and Herzegovina. In total, we have assembled 536 users, who have collected 163,843 species observation records data from the field and digitalised 33,458 literature records. The number of active users and their records is growing daily. Out of the total number of gathered data, 89% has been made open access by the users, 10% is accessible on the scale of 10×10 km and only 1% is closed. In the future, we plan to provide a taxonomic data portal that could be used by local and national initiatives in Eastern Europe, aggregate all data into a single web location, create detailed data overview and enable fluent communication between users.
Database of Romanian cave invertebrates with a Red List of cave species and a list of hotspot/coldspot caves
Authors: Moldovan Oana Teodora , Iepure Sanda , Brad Traian , Kenesz Marius , Mirea Ionuț Cornel , Năstase-Bucur Ruxandra
Published: June 2020

The increasing human impact in Romanian caves raises the urgency of publishing a correct database of the strictly-adapted cave fauna. Previous attempts at indexing cave fauna and classifying caves by using their fauna opened many questions regarding the use of an incomplete list of cave species and mixed lists of troglobionts/stygobionts with troglophiles/stygophiles for ranking caves with priority for protection. It has also become obvious that there is a need to publish a list of Romanian cave species that are under threat. Cave species in Romania (and elsewhere) are endemic on small ranges, are unique and must be considered as important units for conservation. A cave must be equally protected if it has one or more rare and strictly endemic cave species. Although not exhaustive, we here provide the first checklist of Romanian troglobionts/stygobionts developed in the framework of the DARKFOOD and GROUNDWATERISK projects, coordinated by the “Emil Racovita” Institute of Speleology, Cluj-Napoca, Romania. The GIS application was used to complement the checklist of cave species with data on caves and surface environments above the caves. Until complete data on species diversity and population sizes are made available for each cave, measures of conservation can be implemented, based on the presence/absence of cave species, while classifications of caves for protection, based on the number of species, must be avoided. We also propose a list of Romanian caves with fauna that are under threat and a tentative Red List of Romanian troglobiont/stygobionts.

This is the first database with identified troglobiont and stygobiont species of Romania, with a critical analysis of their distribution inside the country. A list of caves that need protection for their rare and unique species and a tentative Red List of Romanian cave fauna are also added. A total of 173 species were identified, of which 77 troglobionts and 96 stygobionts are currently registered in 366 caves. The database is divided into two parts, one part with a list of troglobionts, their revised systematic position, cave name, cave code and geographic region; and the second part with the same information on stygobionts. The database represents the contribution of many active researchers, who are the authors of this paper and of review publications of many other authors of the "Emil Racoviță" Institute of Speleology.
Faire campagne sur Youtube : une nouvelle « grammaire » pour contrôler sa communication et influer sur le cadrage médiatique ?
Authors: Theviot Anaïs
Published: June 2020

La campagne présidentielle de 2017 a été marquée par un outil crée il y a plus de dix ans : Youtube. Pourtant, il apparaît alors comme une nouveauté sur la scène politique française et fait l’objet de nombreux commentaires journalistiques au regard du succès de la chaîne Youtube du candidat de la France Insoumise, Jean-Luc Mélenchon. Ce dernier s’est en effet inspiré de la tendance des youtubeurs populaires au grand nombre d’abonnés, tels que Cyprien (plus de 13 millions), Squeezie (presque 13 millions) et Norman (presque 10 millions). L’objectif de cet article est de repérer cette « grammaire » des youtubeurs à succès et d’analyser comment ces codes sont ensuite repris, adaptés par le candidat de la France Insoumise. Nous verrons qu’au-delà du format, ce qui est recherché est avant tout la visibilité médiatique en ligne et hors ligne pour modeler l’image du candidat, proche du « peuple ».
Comment voisine-t-on dans la France confinée ?
Authors: Lambert Anne , Cayouette-Remblière Joanie , Guéraut Élie , Le Roux Guillaume , Bonvalet Catherine , Girard Violaine , Langlois Laetitia
Published: June 2020

En temps normal comme en période de crise, les échanges de services de proximité n’échappent pas aux lois de la sociabilité : les cadres compensent l’éloignement relatif de leur famille par des relations de voisinage plus nombreuses, et se sentent moins isolés que les autres catégories sociales. Pendant le confinement lié à la pandémie de Covid-19, la proportion de services échangés avec les voisins est restée stable, mais elle s’est réorientée au profit des personnes de 75 ans ou plus, et au détriment des familles. Plus que jamais, les personnes de 60 à 74 ans sont au centre de l’entraide. Sur un point, pourtant, le confinement a changé la donne : l’échange de services n’a pas empêché la forte augmentation du sentiment d’isolement.
Outcomes Comparison Between Wavefront-Optimized and Topography-Guided PRK in Contralateral Eyes With Myopia and Myopic Astigmatism
Authors: Faria-Correia Fernando , Ribeiro Sara , Lopes Bernardo T. , Salomão Marcella Q. , Ambrósio Renato
Published: June 2020

PURPOSE:

To compare clinical outcomes between topography-guided customized ablation treatment (TCAT) and wavefront-optimized (WFO) photorefractive keratectomy (PRK) in fellow eyes of myopic patients.

METHODS:

Forty-six eyes of 23 patients who underwent PRK were included. WFO ablation was performed in one eye (WFO group) and TCAT in the fellow eye (TCAT group). The customized treatment plan was based on the Topolyzer Vario topography system (Alcon Laboratories, Inc) data. The patients were observed for 12 months after the procedure.

RESULTS:

One year after the surgery, there was no significant difference in the manifest refraction spherical equivalent, sphere, or cylinder variables between the two groups (
P
> .05). In both groups, 96% of eyes achieved an uncorrected distance visual acuity of 20/20 or better at 12 months postoperatively. Accuracy, safety, and efficacy of the refractive and visual outcomes were similar in the two groups. The postoperative higher order aberrations magnitude was lower in the TCAT group, but this was not statistically significant (
P
> .05). During the 12-month follow-up, no patient described any symptoms related to glare, halos, or starbursts in either eye. Other postoperative complications, such as infection or cor-neal infiltrates, did not occur in either group.

CONCLUSIONS:

TCAT and WFO ablations provided similar outcomes after PRK for myopia and myopic astigmatism correction. There were no statistically significant differences in postoperative corneal wavefront analysis.

[
J Refract Surg
. 2020;36(6):358–365.]
Femtosecond Laser–Assisted LASIK in Children With Hyperopia and Anisometropic Amblyopia: 7 Years of Follow-up
Authors: Kulikova Irina Leonidovna , Pashtaev Nikolay Petrovich , Batkov Yevgeniy Nikolayevich , Pikusova Svetlana Mikh'ilovna , Terent'eva Anna Evgen'evna
Published: June 2020

PURPOSE:

To analyze clinical and functional results of femtosecond laser–assisted laser in situ keratomileusis (FSLASIK) in children with hyperopia and unilateral anisome-tropic amblyopia.

METHODS:

The study included 24 patients (24 eyes) aged 5 to 15 years. Before the surgery, the mean manifest refractive spherical equivalent (MRSE) of amblyopic eyes was +3.90 ± 1.60 diopters (D) (range: +1.50 to +6.80 D) and the mean refractive anisometropia was 3.06 ± 1.64 D (range: 0.87 to 7.50 D). Every patient had at least 1 year of ineffective traditional amblyopia treatment before surgery. The mean follow-up period was 7 years (range: 6.9 to 7.4 years).

RESULTS:

At the final follow-up visit, the mean MRSE of operated eyes was +0.41 ± 1.35 D (range: −1.13 to +3.88 D) (
P
< .001) and anisometropia in MRSE notation was 1.39 ± 1.15 D (range: 0.00 to 4.63 D). Postoperative spherical equivalent was within ±0.50, ±1.00, and ±2.00 D in 31%, 38%, and 92%, respectively. There were no complications. All patients showed a one to seven line gain of corrected distance visual acuity.

CONCLUSIONS:

FS-LASIK was an effective method of hyperopia correction in this cohort of children with amblyopia, resulting in reduction in anisometropia, restoration of refractive balance, and functional improvement in the amblyopic eye when traditional methods failed.

[
J Refract Surg
. 2020;36(6):366–373.]
Refractive Changes After Corneal Stromal Filler Injection for the Correction of Hyperopia
Authors: Wertheimer Christian M. , Brandt Katharina , Kaminsky Steffen , Elhardt Carolin , Kassumeh Stefan A. , Pham Linh , Schulz-Hildebrandt Hinnerk , Priglinger Siegfried , Anderson R. Rox , Birngruber Reginald
Published: June 2020

PURPOSE:

To evaluate a new non-ablative and adjustable procedure for laser ablative refractive corneal surgery in hyperopia using the injection of a biocompatible liquid filler material into a stromal pocket.

METHODS:

A total of 120 stromal pockets were created using a clinical femtosecond laser system in 96 rabbit corneoscleral discs and 24 whole globes. Pockets were cut at a depth of 120 or 250 µm below the epithelial surface. Hyaluronic acid was injected manually into the pocket. To determine the refractive changes, three-dimensional optical coherence tomography images and a specifically developed picture recognition Matlab (The Mathworks) routine were used.

RESULTS:

After injection, a steepening of the anterior and flattening of the posterior corneal surface was observed, which led to hyperopic correction. The two main factors determining the amount of correction were the pocket depth and the injected volume. After the pocket was homogeneously filled, an initial refractive increase was observed, followed by a linear relation between the injected volume and the refraction increase.

CONCLUSIONS:

This possible clinical protocol for controlled refraction correction of hyperopia suggests a potential readjustable clinical application.

[
J Refract Surg
. 2020;36(6):406–414.]
Sleep Problems in Children with Autism Spectrum Disorder
Authors: Posar Annio , Visconti Paola
Published: June 2020

Sleep disorders are one of the most frequent comorbidities in children with autism spectrum disorder (ASD). Heterogeneous sleep problems in children with ASD have been reported, and insomnia has a prevalence in children with ASD ranging from 60% to 86%. Poor sleep can cause harmful effects on cognitive functions, fostering the appearance of aggression, irritability, inattention, and hyperactivity in children with ASD. Sleep disorders can also be related to the severity of the core symptoms of ASD, including social cognition and communication, stereotypic behavior, and hypersensitivity to the environment. The etiology of sleep disorders in children with ASD is multifactorial, related to complex interactions between biological factors and psychological, socio-environmental, and family factors. From the therapeutic perspective, interventions should only be considered after any medical conditions potentially contributing to sleep disorders have been carefully evaluated.

[
Pediatr Ann.
2020;49(6):e278–e282.]
Postinfectious Glomerulonephritis
Authors: Mohammad Dunya , Baracco Rossana
Published: June 2020

Postinfectious glomerulonephritis continues to be the most common cause of acute glomerulonephritis in children. Although in the past it was considered to be mainly a complication of streptococcal infections, today it is well known that infection with many other pathogens may trigger an immune response that results in glomerular injury. Most children with postinfectious glomerulonephritis have an excellent prognosis with complete recovery of renal function and no recurrence. This article summarizes the history, presentation, evaluation, differential diagnosis, and management of children with postinfectious glomerulonephritis.

[
Pediatr Ann
. 2020;49(6):e273–e277.]
Los lenguajes documentales en las bases de información política y de actualidad
Authors: Rodríguez Vela Cristina
Published: June 2020

La vieja discusión entre lenguaje libre y lenguaje controlado cobra especial trascendencia cuando se trata de bases de información política y de actualidad. La conveniencia o no de aplicar un tesauro a las tareas de análisis documental de la prensa diaria y semanarios de actualidad es objeto de este trabajo . La riqueza conceptual de esta documentación desborda la adaptación de un tesauro a esa realidad cambiante. Sin embargo, la combinación de búsqueda en texto libre y mediante descriptores garantiza el éxito de la misma. La adopción de ambos procedimientos asegura una estrategia que, por su carácter complementario, parece la aconsejable para el tratamiento de este tipo de documentación.
Diseño de una base de datos de prensa controlada por un lenguaje facetado de estructura combinatoria («Thesaurus»)
Authors: Izquierdo Arroyo José María , Moreno Fernández Luis M.
Published: June 2020

Este proyecto se inscribe en el marco del Plan de Información y Documentación de las Comunidades Autónomas, uno de cuyos objetivos es favorecer la creación y coordinación de Bases de Datos. Describe la construcción y el mantenimiento de una base de datos y un lenguaje documental de estructura combinatoria («Thesaurus»), para el tratamiento de la documentación de actualidad referida a la Comunidad Autónoma de la Región de Murcia. Incluye los diversos tipos de registros que integrarán las Bases de Datos, el equipo informático propuesto para el almacenamiento y recuperación de la información, las características del Thesaurus que ha de controlarla y el plan de trabajo a seguir en la elaboración de ambos productos. Tareas que se realizan de modo conjunto.
Los niveles alternativos en los estándares bibliográficos
Authors: Busquets Daniel
Published: June 2020

Se comentan los recientes desarrollos para el establecimiento de normas internacionales de descripción bibliográfica de monografías ISBD (M) simplificadas como nivel alternativo, y las propuestas relativas a formatos bibliográficos MARC mínimos. Los factores que concurren en este enfoque y sus antecedentes son también analizados . Se resumen brevemente las prácticas de catalogación de nivel mínimo en Estados Unidos y Gran Bretaña. La situación actual de los estándares de nivel mínimo en España es asimismo descrita. Se incluyen algunos comentarios sobre los registros bibliográficos breves, la normalización bibliotecaria, y sus necesidades actuales
Las revistas científicas: el centro y la periferia
Authors: Jiménez Contreras Evaristo
Published: June 2020

Se analiza la composición por países del fondo de Revistas de SCI para establecer el número de las revistas pertenecientes a Francia, Italia y España y su evolución dentro de este conjunto entre los años 1976-90. Igualmente se estudian los datos relativos a la producción de estos países. Por último se apuntan las posibles razones que explican la evolución opuesta de los valores correspondientes a uno y otro grupo.
Centros de acceso a bases de datos en España: Datos de cinco años
Authors: Capo Rosa Maria
Published: June 2020

Se ofrecen estadísticas que permiten observar la evolución de los centros de teledocumentación españoles entre 1985 y 1990, elaboradas a partir de los cuestionarios enviados y recopilados para realizar el Directorio de Centros de Acceso a Bases de datos . que actualmente se mantiene como base de datos online («Dirce») en el Instituto de Estadística de Catalunya. Los centros se clasifican por: accesibilidad; tipo de institución; fecha de inicio del servicio; comunidades autónomas; áreas temáticas; número de contratos con distribuidores españoles/extranjeros; número de profesionales y lectores/ subscripciones a bases de datos en CD-ROM.
Pasado cercano y futuro inmediato de la FID/CLA. Una visión a mitad del camino
Authors: Arango Humberto
Published: June 2020

No disponible
BIREME: Un modelo. de cooperación entre países
Authors: Rodríguez Alonso Fernando
Published: June 2020

No disponible
Un proyecto de cooperación bibliotecaria en el ámbito iberoamericano
Authors: Caro Carmen
Published: June 2020

Presentamos un artículo en el que se distinguen dos partes. Una teórica introductoria en la que se repasan los antecedentes de la cooperación bibliotecaria en el ámbito iberoamericano y otra de realizaciones durante dos años de trabajo continuado.
Con motivo de la conmemoración del Quinto Centenario del Descubrimiento de América, se ha iniciado el primer plan cooperativo bibliotecario internacional de largo alcance que aborda no sólo proyectos sino también los problemas a los que se enfrentan las bibliotecas en la actualidad. En él participan las bibliotecas de países con un pasado histórico común, con unas lenguas y unas culturas comunes como son las Bibliotecas Nacionales de lberoamérica. Los proyectos concretos que este plan tiene como objetivo prioritario son la creación de una gran base de datos bibliográfica que reúna los fondos de las Bibliotecas Nacionales Iberoamericanas, y de inmediata ejecución, la elaboración de ediciones en soporte magnético, el equipamiento de las Bibliotecas tanto en el campo de la automatización como en el de la preservación y restauración, la formación y actualización de conocimientos del personal bibliotecario, la difusión del patrimonio cultural con la edición de libros de referencia y facsímiles y la exposición de las piezas más significativas.
La consecución de estos proyectos significa un alto grado de coordinación, una vertebración probada entre todas las bibliotecas participantes y una enorme influencia, repercusión y proyección en foros internacionales tanto del mundo de las bibliotecas como ajenos a él.
En este proyecto España y Portugal son los dos países que forman parte tanto de lberoamérica como de Europa, por lo que son nexo de unión de los dos ámbitos, participando en proyectos de la Asociación de Bibliotecas Nacionales de lberoamérica (ABINIA) como de la Red Europea de Información y Documentación sobre América Latina (REDIAL).
Situación de la industria de bases de datos en lberoamérica
Authors: Ruiz González Beatriz
Published: June 2020

En los países de habla española y portuguesa se está desarrollando un sentimiento cada vez más firme de la importancia de la información automatizada en su calidad de herramienta para la toma de decisiones políticas, económicas y sociales. De esta forma, la comunidad iberóamericana de países está evolucionando desde una situación de casi absoluta dependencia en materia de información hacia un adecuado grado de autonomía en este campo. En este artículo se ofrece un análisis de la situación de la industria de bases de datos en esta comunidad basado en los datos aportados en el censo de bases de datos iberoamericanas realizado por la Fundación Fuinca en 1988.
Circulations savantes et production des identités territoriales dans les Pyrénées centrales (1880-1930)
Authors: Chandivert Arnauld
Published: June 2020

Cet article est consacré à l’examen de l’élaboration des images territoriales et des représentations de l’identité culturelle dans les Pyrénées centrales, et ce dans le dernier quart du xixe siècle et le premier quart du siècle suivant. Il se concentre sur la contribution de plusieurs sociétés d’érudition à cette élaboration, en portant l’attention sur les différents registres de singularisation alors utilisés. Il analyse notamment l’importance prise par des « circulations savantes » entre différents lieux et échelles d’action, qui seules permettaient d’assurer ce que visaient ces sociétés : montrer que leur territoire de référence était porteur d’un certain nombre de spécificités, qui en faisaient un objet d’études des plus intéressants. Cependant, il est aussi possible de comprendre l’importance grandissante prise sur la période par l’échelon régional dans l’organisation des activités scientifiques et d’examiner les conditions ayant conduit à une déqualification progressive de ces savoirs érudits.
Des choix intimes dérangeants : Narrations privées et discours publics sur l’immigration et l’islam dans l’Italie contemporaine
Authors: Odasso Laura
Published: June 2020

En Italie, depuis la moitié des années 1970, l’immigration transforme le tissu social et les dynamiques familiales. Dans ce contexte historique, en mobilisant et en articulant des documents médiatiques et des narratives privées de femmes italiennes mariées avec des ressortissants étrangers provenant d’un pays arabo-musulman, l’article montre l’ingérence du discours public sur l’immigration et l’islam dans les représentations de la vie conjugale mixte. Une doxa néo-orientaliste et fémonationaliste, ainsi qu’un discours sécuritaire et antimusulman traversent la société italienne contemporaine et produisent des stéréotypes racisés et sexués qui n’affectent pas uniquement les étrangers, mais aussi leurs conjointes.
L’ère de l’intimité : Un nouvel agenda pour l’histoire de la famille dans l’Italie contemporaine
Authors: Asquer Enrica
Published: June 2020

L’article présente une réflexion critique sur l’historiographie dédiée aux relations familiales en Italie au xxe siècle, dans le but de tracer un nouvel agenda de recherche capable d’aller au-delà des résultats obtenus lors de la saison productive des années 1980. À la lumière de l’histoire culturelle et du genre, l’article propose d’adopter une perspective moins centrée sur les reconstructions linéaires et plus attentive à éclairer les conflits sociaux qui traversent la définition même de la famille et de l’intimité. À partir de deux thèmes emblématiques, les pratiques de consommation et les comportements reproductifs, l’article aborde ensuite la question d’ordre méthodologique posée par l’affaiblissement progressif de l’histoire sociale et souligne la nécessité d’une imbrication étroite entre le « social » et le « culturel ».
La « fonction essentielle » des femmes : Famille, travail domestique et salaire en Italie entre fascisme et République
Authors: Gissi Alessandra
Published: June 2020

L’article analyse le débat politique autour du salaire pour les femmes au foyer en Italie. Il remonte aux sources de cette question dans les propos du mouvement tayloriste sur l’organisation scientifique du travail domestique qui se développera en Italie, et ailleurs en Europe, à partir des années 1920. Puis, il se prolonge, dans l’après-guerre, quand la discussion reprendra lors de la rédaction de la Constitution de la République italienne. Son article 37 réaffirmera la « naturalité » de la fonction maternelle et stoppera le débat. La question du « salaire domestique » émergera à nouveau dans les années 1970 dans les réflexions du groupe féministe de Padoue, Lotta femminista. Dans les mêmes années les femmes immigrées commencent à devenir prépondérantes dans ce secteur du marché de travail.
DIAGNOSIS OF LUNG NODULES FROM 2D COMPUTER TOMOGRAPHY SCANS
Authors: Karrar Ayat , Mabrouk Mai S. , Wahed Manal AbdEl
Published: June 2020

Cancers typically are both highly dangerous and common. Among these, lung cancer has one of the lowest survival rates compared to other cancers. CT scans can reveal dense masses of different shapes and sizes; in the lungs, these are called lung nodules. This study applied a computer-aided diagnosis (CAD) system to detect candidate nodules — and diagnose it either solitary or juxtapleural — with equivalent diameters, ranging from 7.78[Formula: see text]mm to 22.48[Formula: see text]mm in a 2D CT slice. Pre-processing and segmentation is a very important step to segment and enhance the CT image. A segmentation and enhancement algorithm is achieved using bilateral filtering, Thresholding the gray-level transformation function, Bounding box and maximum intensity projection. Border artifacts are removed by clearing the lung border, erosion, dilation and superimposing. Feature extraction is done by extracting 20 gray-level co-occurrence matrix features from four directions: [Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text] and one distance of separation ([Formula: see text] pixel). In the classification step, two classifiers are proposed to classify two types of nodules based on their locations: as juxtapleural or solitary nodules. The two classifiers are a deep learning convolutional neural network (CNN) and the K-nearest neighbor (KNN) algorithm. Random oversampling and 10-fold cross-validation are used to improve the results. In our CAD system, the highest accuracy and sensitivity rates achieved by the CNN were 96% and 95%, respectively, for solitary nodule detection. The highest accuracy and sensitivity rates achieved by the KNN model were 93.8% and 96.7%, respectively, and K was set to 1 to detect juxtapleural nodules.
Hydrophobic Zinc Oxide Nanocomposites for Consolidation and Protection of Quartzite Sculptures: A Case Study
Authors: Hefni Yasser Kamal
Published: June 2020

Quartzite sculptures are considered some of the most impressive and informative archaeological remains which have been found in the most of Egyptian archaeological sites. Regrettably, quartzite sculptures suffer from many deterioration aspects such as granular disintegration, scaling, cracking, efflorescence, soiling, microbiological colonization. Water is the main aggressive deterioration factor of stones and stone-based monuments, as in addition to its direct role in deterioration mechanisms, it plays as a catalyst in the physicochemical and microbiological deterioration processes.During the last two decades, polymer nanocomposites have widely been applied in the field of cultural heritage conservation due to their unique physical and chemical characteristics. Zinc oxide nanoparticles are among the most important semiconductive nanomaterials that have been applied in the fabrication of nanocomposites. They have been demonstrated to improve the physicochemical and mechanical properties of polymers. In addition, zinc oxide nanoparticles were mixed with polymers in order to fabricate superhydrophobic and self-cleaning protective materials.The aim of this paper is to evaluate the efficiency of zinc oxide nanocomposites, in order to select the best of them for the consolidation and protection of a colossal quartzite statue of Ramesses II. The properties of the treated quartzite samples were comparatively examined by colourimetric measurements, static water contact angle, compressive strength, and scanning electron microscope.
Effect of Processing Parameters on the Morphology, Particulate, and Superconducting Properties of Electrospun YBCO Nanostructures
Authors: Jasim Saleh Eesaa , Jusoh Mohamad Ashry , Kamarudin Muhammad Aizat , Esa Fahmiruddin , Nazlan Rodziah
Published: June 2020

Superconductivity in nanostructured ceramics offers significant advantages over the conventional coarse-grained materials in view of miniaturization of superconducting electronic devices. In this paper, we report the formation of four morphologies of superconducting YBa2Cu3O7-δ (YBCO) nanostructures by electrospinning technique using polymeric polyvinyl pyrrolidone (PVP) solutions of different molecular weight and altering the total content of the metallic precursors. The morphologies prepared using this strategy are nanorods (NRs), nanogarlands (NGs), nanohierarchical (NH), and nanoparticles (NPs). Alternating current susceptibility measurements showed high critical temperatures (TC ~90 K) for the NH YBCO synthesized using PVP of the lowest molecular weight; whereas the YBCO NRs synthesized using a higher molecular weight polymer showed the lowest TC (82 K). A relationship between the particulate properties and TC was also observed – the lower is the pore size the higher is the TC. The YBCO NGs showed the highest specific surface area (7.06 m2/g) with intermediate TC (88 K). Electrospinning process appears an effective and controllable technique to produce different nanomorphologies with intrinsic properties suitable for practical applications.
Difference of Work Related Behaviors between Generation X and Generation Y: A Study of Professionals of a Development Bank in Sri Lanka
Authors: Pathirage U. K. , Weerasinghe, T. D.
Published: June 2020

Managing a multi-generation workforce today is becoming endlessly challenging, basically due to their different work related behaviors. In the recent literature, it is reported that further investigations are required for three work related behaviors of generations; work engagement, career development and teamwork, in banks, especially in developing countries. As a leading development bank in Sri Lanka, XYZ is unique in its multi-generation workforce consist of 2347 permanent employees as at 31st July 2019 across the county. In the context, a gap is identified for such a study among two major generations; Gen X and Gen Y. Hence, bridging the gap in the context, and adding further evidence to the extant literature, this study was carried out as a cross-sectional, quantitative, field study among a sample of 350 Gen X and Gen Y professionals, randomly selected from XYZ Bank. Primary data were collected based on a standard measurement scale, through an offline questionnaire survey. Descriptive statistics and the Independent Sample t-test were used to analyze data and coming to conclusions with the aid of SPSS software. There is no significant difference found among Gen X and Gen Y professionals at XYZ Bank in terms of those three work related behaviors; work engagement, career development and teamwork. Further, the importance of a strong corporate culture is emphasized in which generational differences are neutralized up to a significant extent. Hence, it is recommended that the XYZ Bank does customize its people management policies and practices based on the needs and the dynamics of its corporate culture.
Impact of Remittances and Gender on Expenditure Pattern: An Insight into Intra-Household Resource allocation of Rural Sector Households in Sri Lanka
Authors: Dharmadasa R.A.P.I.S. , Rathnayake, K.K.H.M , Samaraweera, W.G.R.L
Published: June 2020

Using a nationally representative data set, this study examines the impact of migrant remittances on expenditure pattern and intra-household decision making process of rural households in Sri Lanka. The impact was estimated using fractional logit models within the Engel curve framework. Estimating the fractional logit models, we find evidence that there are strong differences in the impact on expenditure patterns of male and female household heads with the receipt of internal remittances whereas effect of international remittances on changing the expenditure pattern and the intra-household resource allocation is negligible. More specifically male household heads allocate less on education and more on ad hoc purchases, entertainment and transport expenditure, while female household heads allocate more on food expenditure with the receipt of internal remittances. Moreover, remitters’ contribution for the ad hoc purchases, entertainment and transport expenditure increases with their presence as a migrant to the household head. Overall, the study concludes that remittances are not directed towards the productive investments or human capital formation with the receipt of remittances in male headed or female headed households of rural sector of Sri Lanka.
Critical Upper Airway Obstruction as the First Symptom of Acute Myeloid Leukemia—An Anesthesiologic Reminder
Authors: Bruserud Øyvind , Wendelbo Øystein , Vetti Nils , Goplen Frederik Kragerud , Johansen Silje , Reikvam Håkon
Published: June 2020

Acute upper airway obstruction can be fatal. Early recognition of airway distress followed by diagnostic laryngoscopy and prompt intervention to secure airway control is crucial. We here present a 62-year old male patient who presented with cough and increasing respiratory distress for three weeks. Within the next 24 h, he developed symptoms of critical upper airway obstruction, endotracheal intubation was not possible, and an acute surgical tracheotomy was performed to retain patent airways. A computer tomography scan revealed severe laryngopharyngeal soft tissue thickening and upper airway obstruction caused by leukemic infiltration. He was diagnosed with acute leukemia and responded to induction chemotherapy. This case report points out the importance of establishing the diagnosis of critical upper airway obstruction in patients presenting with respiratory symptoms, and highlights the emergency management of airway obstruction due to malignant infiltration of leukemic blasts.
Idiopathic pulmonary hemosiderosis - A rare cause of chronic anemia
Authors: Butt Ayesha , Ahmed Rashida , Sheikh Muhammad Dawood Amir , Khan Omar , Iqbal Nousheen , Rahman Arshalooz Jamila , Khan Javaid Ahmed
Published: June 2020

Idiopathic pulmonary hemosiderosis (IPH) is a rare disease marked by alveolar bleeding and accumulation of hemosiderin in the lungs. Here we present three cases of IPH. The first case is of a 26-year-old male with anemia, hemoptysis and dyspnea. Bronchoscopy confirmed diffuse alveolar hemorrhage (DAH). A diagnosis of IPH was made after ruling out other causes of DAH and observing good response to steroids. The patient’s condition improved with prednisolone and azathioprine. The second case is of 26-year-old female with severe anemia. Imaging suggested IPH and lung biopsy confirmed it. She died shortly afterwards. The third case is of a 7-year-old male with chronic anemia. CT was suggestive of IPH and lung biopsy confirmed the diagnosis. Later, patient developed posterior reversible encephalopathy syndrome (PRES). This patient is stable on azathioprine and prednisolone. We aim to emphasize the importance of considering IPH as a differential in patients with DAH or chronic anemia.