bluuebunny/crossref_metadata_2025 huggingface dataset:
Distinct surface response to black carbon aerosols
Authors: Tang Tao , Shindell Drew , Zhang Yuqiang , Voulgarakis Apostolos , Lamarque Jean-Francois , Myhre Gunnar , Faluvegi Gregory , Samset Bjørn , Andrews Timothy , Olivié Dirk , Takemura Toshihiko , Lee Xuhui
Published: May 2021

Abstract. For the radiative impact of individual climate forcings, most previous studies focused on the global mean values at the top of the atmosphere (TOA) and less attention has been paid to surface processes, especially for black carbon aerosols. In this study, the surface radiative responses to five different forcing agents were analyzed by using idealized model simulations. Our analyses reveal that for greenhouse gases, solar irradiance and scattering aerosols, the surface temperature changes are mainly dictated by the changes of surface radiative heating, but for BC, surface energy redistribution between different components plays a more crucial role. Globally, when a unit BC forcing was imposed at TOA, the net shortwave radiation at the surface decreased by 5.09 ± 1.80 W m−2 (averaged over global land), which is partially offset by increased downward longwave radiation (1.67 ± 0.24 W m−2) from the warmer atmosphere, causing a net decrease in the incoming downward surface radiation of 3.42 ± 0.51 W m−2. Despite a reduction in the downward radiation energy, the surface air temperature still increased by 0.14 ± 0.05 K because of less efficient energy dissipation, manifested by reduced surface sensible (2.53 ± 0.37 W m−2) and latent heat flux (1.30 ± 0.27 W m−2), as well as a decrease of Bowen ratio (0.18 ± 0.05). Such reductions of turbulent fluxes can be largely explained by enhanced air stability (0.06 ± 0.01 K), measured as the difference of the potential temperature between 925 hPa and surface, and reduced surface wind speed (0.05 ± 0.01 m s−1). The enhanced stability is due to the faster atmospheric warming relative to the surface whereas the reduced wind speed can be partially explained by enhanced stability and reduced equator-to-pole atmospheric temperature gradient. These rapid adjustments under BC forcing exerted a “top-down” impact on the surface energy redistribution and thus, surface temperature response, which is not observed under greenhouse gas or scattering aerosols. Our study provides new insights into the impact of absorbing aerosols on surface energy balance and surface temperature response.
Compositional data analysis (CoDA) as a tool to evaluate a new low-cost settling-based PM10 sampling head in a desert dust source region
Authors: Xu-Yang Yangjunjie , Losno Rémi , Monna Fabrice , Rajot Jean-Louis , Labiadh Mohamed , Bergametti Gilles , Marticorena Béatrice
Published: May 2021

Abstract. This paper presents a new sampling head design and the method used to evaluate it. The elemental composition of aerosols collected by two different sampling devices in a semi-arid region of Tunisia is compared by means of compositional perturbation vectors and biplots. This set of underused mathematical tools belongs to a family of statistics created specifically to deal with compositional data. The two sampling devices operate at a flow rate of about 17 L min−1, with a cut-off diameter of 10 µm. The first device is a low-cost laboratory-made system, where the largest particles are removed by gravitational settling in a vertical tube. This new system will be compared to the second device, a brand-new standard commercial PM10 sampling head, where size segregation is achieved by particle impaction on a metal surface. A total of 44 elements (including rare earth elements or REE, together with Al, As, Ba, Be, Ca, Cd, Co, Cr, Cu, Fe, K, Li, Mg, Mn, Mo, Na, Ni, P, Pb, Rb, S, Sc, Se, Sr, Ti, Tl, U, V, Zn, and Zr), was analysed in sixteen paired samples, collected during a two-week field campaign in Tunisian dry lands, close to source areas, with high levels of large particles. The contrasting meteorological conditions encountered during the field campaign allowed a broad range of aerosol compositions to be collected, with very different aerosol mass concentrations. No compositional differences were observed between samples collected simultaneously by the two devices. The mass concentration of the particles collected was estimated through chemical analysis, and results for the two sampling devices were also very similar to those obtained from an on-line aerosol weighing system, TEOM (tapered element oscillating micro-balance), installed next to them. Results suggest that the commercial PM10 impactor head can therefore be replaced by the decanter, without any measurable bias, for the determination of chemical composition, and for further assessment of PM10 concentrations in source regions.
On the semi-annual variation of relativistic electrons in the outer radiation belt
Authors: Katsavrias Christos , Papadimitriou Constantinos , Aminalragia-Giamini Sigiava , Daglis Ioannis A. , Sandberg Ingmar , Jiggens Piers
Published: May 2021

Abstract. The nature of the semi-annual variation in the relativistic electron fluxes in the Earth's outer radiation belt is investigated using Van Allen Probes (MagEIS and REPT) and Geostationary Operational Environmental Satellite Energetic Particle Sensor (GOES/EPS) data during solar cycle 24. We perform wavelet and cross-wavelet analysis in a broad energy and spatial range of electron fluxes and examine their phase relationship with the axial,
equinoctial and Russell–McPherron mechanisms. It is found that the semi-annual variation in the relativistic electron fluxes exhibits pronounced power in the 0.3–4.2 MeV energy range at L shells higher than 3.5, and, moreover, it exhibits an in-phase relationship with the Russell–McPherron effect, indicating the former is primarily driven by the latter. Furthermore, the analysis of the past three solar cycles with GOES/EPS indicates that the semi-annual variation at geosynchronous orbit is evident during the descending phases and coincides with periods of a higher (lower) high-speed stream (HSS) (interplanetary coronal mass ejection, ICME) occurrence.
Carbonyl sulfide: comparing a mechanistic representation of the vegetation uptake in a land surface model and the leaf relative uptake approach
Authors: Maignan Fabienne , Abadie Camille , Remaud Marine , Kooijmans Linda M. J. , Kohonen Kukka-Maaria , Commane Róisín , Wehr Richard , Campbell J. Elliott , Belviso Sauveur , Montzka Stephen A. , Raoult Nina , Seibt Ulli , Shiga Yoichi P. , Vuichard Nicolas , Whelan Mary E. , Peylin Philippe
Published: May 2021

Abstract. Land surface modellers need measurable proxies to
constrain the quantity of carbon dioxide (CO2) assimilated by
continental plants through photosynthesis, known as gross primary production
(GPP). Carbonyl sulfide (COS), which is taken up by leaves through their
stomates and then hydrolysed by photosynthetic enzymes, is a candidate GPP
proxy. A former study with the ORCHIDEE land surface model used a fixed
ratio of COS uptake to CO2 uptake normalised to respective ambient
concentrations for each vegetation type (leaf relative uptake, LRU) to
compute vegetation COS fluxes from GPP. The LRU approach is known to have
limited accuracy since the LRU ratio changes with variables such as
photosynthetically active radiation (PAR): while CO2 uptake slows under
low light, COS uptake is not light limited. However, the LRU approach has
been popular for COS–GPP proxy studies because of its ease of application
and apparent low contribution to uncertainty for regional-scale
applications. In this study we refined the COS–GPP relationship and
implemented in ORCHIDEE a mechanistic model that describes COS uptake by
continental vegetation. We compared the simulated COS fluxes against
measured hourly COS fluxes at two sites and studied the model behaviour and
links with environmental drivers. We performed simulations at a global scale,
and we estimated the global COS uptake by vegetation to be −756 Gg S yr−1,
in the middle range of former studies (−490 to −1335 Gg S yr−1). Based
on monthly mean fluxes simulated by the mechanistic approach in ORCHIDEE, we
derived new LRU values for the different vegetation types, ranging between
0.92 and 1.72, close to recently published averages for observed values of
1.21 for C4 and 1.68 for C3 plants. We transported the COS using the monthly
vegetation COS fluxes derived from both the mechanistic and the LRU
approaches, and we evaluated the simulated COS concentrations at NOAA sites.
Although the mechanistic approach was more appropriate when comparing to
high-temporal-resolution COS flux measurements, both approaches gave similar
results when transporting with monthly COS fluxes and evaluating COS
concentrations at stations. In our study, uncertainties between these two
approaches are of secondary importance compared to the uncertainties in the
COS global budget, which are currently a limiting factor to the potential of
COS concentrations to constrain GPP simulated by land surface models on the
global scale.
Deoxygenation dynamics on the western Nile deep-sea fan during sapropel S1 from seasonal to millennial timescales
Authors: Blanchet Cécile L. , Tjallingii Rik , Schleicher Anja M. , Schouten Stefan , Frank Martin , Brauer Achim
Published: May 2021

Abstract. Ocean deoxygenation is a rising threat to marine ecosystems and food
resources under present climate warming conditions. Organic-rich sapropel
layers deposited in the Mediterranean Sea provide a natural laboratory to
study the processes that have controlled changes in seawater oxygen levels
in the recent geological past. Our study is based on three sediment cores
spanning the last 10 000 years and located on a bathymetric transect
offshore from the western distributaries of the Nile delta. These cores are
partly to continuously laminated in the sections recording sapropel S1,
which is indicative of bottom-water anoxia above the western Nile deep-sea
fan. We used a combination of microfacies analyses and inorganic and organic
geochemical measurements to reconstruct changes in oxygenation conditions at
seasonal to millennial timescales. Millimetre-thick laminations are
composed of detrital, biogenic and chemogenic sublayers reflecting seasonal
successions of sedimentation. Dark layers reflect the deposition of summer
floods and two types of light layers correspond to autumn plankton blooms
and authigenic carbonates formed in the water column during spring–early
summer, respectively. The isotopic signature of the authigenic carbonates
suggests permanent anoxic to euxinic bottom waters resulting in high levels
of anaerobic remineralization of organic matter and highlights their
potential to reconstruct seawater chemistry at times when benthic fauna was
absent. Ratios of major elements combined with biomarkers of terrestrial and
marine organic matter and redox-sensitive compounds allow changes
in terrigenous input, primary productivity and past deoxygenation dynamics
on millennial timescales to be tracked. Rapid fluctuations of oxygenation conditions in
the upper 700 m water depth occurred above the Nile deep-sea fan between 10
and 6.5 ka BP, while deeper cores recorded more stable anoxic conditions.
Synchronous changes in terrigenous input, primary productivity and past
oxygenation dynamics after 6.5 ka BP show that runoff-driven eutrophication
played a central role in rapid oxygenation changes in the south-eastern
Levantine Basin. These findings are further supported by other regional
records and reveal time-transgressive changes in oxygenation state driven by
rapid changes in primary productivity during a period of long-term
deep-water stagnation.
ESD Ideas: Planetary Antifragility: A new dimension in the definition of the Safe Operating Space for Humanity
Authors: López-Corona Oliver , Kolb Melanie
Published: May 2021

Abstract. The Safe Operating Space for Humanity is not fully characterized by the state values of Planetary Boundaries because not only does interaction among them matter, but more importantly the perturbation response capacity dimension is missing. We present a systems dynamics measure of this perturbation response capacity under the Antifragility framework. Here we define, for the first time, Planetary Antifragility as the changes of shortwave global albedo anomalies for the July months in the northern hemisphere from 1982 to 2010, which shows a net reduction of 47.63 %. This loss in Antifragility implies a compounding problem because human perturbations such as climate or land-use changes are increasing but at the same time, the planet is losing its capacity to respond to them.
Simulating carbon and water fluxes using a coupled process-based terrestrial biosphere model and joint assimilation of leaf area index and surface soil moisture
Authors: Li Sinan , Zhang Li , Xiao Jingfeng , Ma Rui , Tian Xiangjun , Yan Min
Published: May 2021

Abstract. Reliable modeling of carbon and water fluxes is essential for understanding the terrestrial carbon and water cycles and informing policy strategies aimed at constraining carbon emissions and improving water use efficiency. We used an assimilation framework (LPJ-Vegetation and soil moisture Joint Assimilation, or LPJ-VSJA) to improve gross primary production (GPP) and evapotranspiration (ET) estimates globally. The terrestrial biosphere model that we used is the integrated model – LPJ-PM coupled from the Lund-Potsdam-Jena Dynamic Global Vegetation Model (LPJ-DGVM) and a hydrology module (i.e., the updated Priestley–Taylor Jet Propulsion Laboratory model, PT-JPLSM). Satellite-based soil moisture products derived from the Soil Moisture and Ocean Salinity (SMOS) and Soil Moisture Active and Passive (SMAP) and leaf area index (LAI) from the global Land and Ground satellite (GLASS) product were assimilated into LPJ-PM to improve GPP and ET simulations using a Proper Orthogonal Decomposition-based ensemble four-dimensional variational assimilation method (PODEn4DVar). The joint assimilation framework LPJ-VSJA achieved the best model performance (with an R2 of 0.91 and 0.81 and an RMSD reduced by 50.4 % and 38.4 % for GPP and ET, respectively, compared with those of LPJ-DGVM at the monthly scale). The assimilated GPP and ET demonstrated a better performance in the arid and semiarid regions (GPP: R2 = 0.73, ubRMSD = 1.05 g C m−2 d−1; ET: R2 = 0.73, ubRMSD =  0.61 mm d−1) than in the humid and sub-dry humid regions (GPP: R2 = 0.61, ubRMSD = 1.23 g C m−2 d−1; ET: R2 = 0.66; ubRMSD = 0.67 mm d−1). The ET simulated by LPJ-PM that assimilated SMAP or SMOS had a slight difference, and the ET that assimilated SMAP soil moisture data was more improved than that assimilated SMOS data. Our global simulation modeled by LPJ-VSJA was compared with several global GPP and ET products (e.g., GLASS GPP, GOSIF GPP, GLDAS ET, GLEAM ET) using the triple collocation (TC) method. Our products, especially ET, exhibited advantages in the overall error distribution (estimated error (μ): 3.4 mm month−1; estimated standard deviation of μ: 1.91 mm month−1). Our research showed that the assimilation of multiple datasets could reduce model uncertainties, while the model performance differed across regions and plant functional types. Our assimilation framework (LPJ-VSJA) can improve the model simulation performance of daily GPP and ET globally, especially in water-limited regions.
HazMapper: a global open-source natural hazard mapping application in Google Earth Engine
Authors: Scheip Corey M. , Wegmann Karl W.
Published: May 2021

Abstract. Modern satellite networks with rapid image acquisition cycles allow for near-real-time imaging of areas impacted by natural hazards such as mass wasting, flooding, and volcanic eruptions. Publicly accessible multi-spectral datasets (e.g., Landsat, Sentinel-2) are particularly helpful in analyzing the spatial extent of disturbances, however, the datasets are large and require intensive processing on high-powered computers by trained analysts. HazMapper is an open-access hazard mapping application developed in Google Earth Engine that allows users to derive map and GIS-based products from Sentinel or Landsat datasets without the time- and cost-intensive resources required for traditional analysis. The first iteration of HazMapper relies on a vegetation-based metric, the relative difference in the normalized difference vegetation index (rdNDVI), to identify areas on the landscape where vegetation was removed following a natural disaster. Because of the vegetation-based metric, the tool is typically not suitable for use in desert or polar regions. HazMapper is not a semi-automated routine but makes rapid and repeatable analysis and visualization feasible for both recent and historical natural disasters. Case studies are included for the identification of landslides and debris flows, wildfires, pyroclastic flows, and lava flow inundation. HazMapper is intended for use by both scientists and non-scientists, such as emergency managers and public safety decision-makers.
Auditoría de recursos humanos: análisis bibliométrico
Authors: Sánchez Henríquez Jorge Alejandro , Yáñez Vidal Ignacio Andrés
Published: May 2021

El propósito de este artículo es presentar un análisis de la producción científica sobre auditoría de recursos humanos, utilizando para ello la bibliometría, la investigación se realizó en las dos principales y reconocidas bases de datos globales, Scopus y Web of Science. Los artículos científicos encontrados fueron procesados mediante las herramientas MS Excel, RStudio, VosViewer y Bibliometrix, proporcionando información sobre la producción anual, producción por países, producción en revistas, análisis por autores, información sobre el nivel de citación de los documentos, coincidencia de palabras claves y análisis de los documentos. La producción científica sobre la auditoría de recursos humanos en las bases de datos estudiadas va aumentando en el tiempo, sin embargo, sigue siendo muy baja, a pesar de ello destacaron estudios referentes a auditorías en el área de la medicina, de la innovación, en el área medioambiental, de la compensación, del conocimiento humano, de la evaluación de desempeño. A nivel de resultados se destaca que la producción científica se encuentra muy concentrada tanto a nivel de páises, como de continentes y especialmente a nivel de autores. Además, se constató un bajísimo nivel de cocitacaciones. Los artículos más específicos sobre auditoría de recursos humanos no se encuentran publicados en revistas de auditoría o contabilidad, lo que refleja lo transversal que resulta este tema, que según los autores aumentará la productividad científica en esta área, en el futuro.
Prácticas de liderazgo dirigido en pymes del sector construcción. Propiedades psicométricas en la medición
Authors: Quijano García Román Alberto , Magaña Medina Deneb Elí
Published: May 2021

La industria de la construcción es un referente económico, ya que refleja de manera inmediata el desarrollo o crisis financiera de los países, la permanencia de las empresas pymes que participan en el sector es fundamental ya que proveen empleo a la población con menos preparación académica, por lo tanto, se requiere información sobre la influencia del estilo de liderazgo en las actividades de este tipo de organizaciones y su incidencia en el posicionamiento actual en el mercado. Este trabajo tiene como principal objetivo la validación psicométrica de una subescala denominada Liderazgo Dirigido obtenida del Inventario de Prácticas de Liderazgo de Kouzes y Posner (1996), así como determinar las diferencias por sector económico. El estudio es cuantitativo con un diseño no experimental transversal, los resultados de fiabilidad y validez (análisis factorial exploratorio y confirmatorio) muestran un adecuado ajuste. Se encontraron diferencias significativas entre los sectores económicos cuyo tamaño del efecto para ambas dimensiones se puede considerar moderado. Se concluye que el modelo se ajusta empíricamente a la teoría y aporta una escala válida y confiable para su empleo en el contexto estudiado.
Innovación y Diseño: cómo transformar organizaciones y prosperar en mercados competitivos
Authors: Montenegro Orozco Josué Carlos
Published: May 2021

El objetivo del presente artículo es analizar la estructura del modelo de innovación impulsado por procesos de diseño y como este puede promover transformaciones estratégicas en las firmas, que les permitan mantenerse competitivas en el mercado y responder de manera más efectiva a los desafíos que este impone. La investigación es de tipo descriptiva y ha seguido un proceso sistémico de revisión de literatura en bases de datos especializadas para identificar fuentes de información pertinentes. Se encontró que el Pensamiento de Diseño a través del impulso de prácticas metodológicas, restructuración de procesos, y fomento al intercambio de información y aprendizaje continuo puede transformar la cultura de una organización, permitiendo el surgimiento de nuevos métodos de trabajo que agilicen la identificación e interpretación de necesidades y problemas al igual que la formulación de acciones de respuesta. Se concluye que el modelo de innovación planteado puede tener un papel estratégico en las organizaciones en la medida en que también existan estructuras internas de apoyo.
Perspectiva espacio - territorio en la gestión integral e inteligente de destinos turísticos
Authors: Font Aranda Mabel
Published: May 2021

Los desplazamientos humanos han estado presentes a lo largo de la historia, y es un elemento distintivo de la actividad turística. Las personas se sienten atraídas por recursos, productos, ofertas, experiencias; naturales y culturales que existen fuera del lugar de residencia habitual. Emerge un destino turístico, donde se configuran todas las condiciones para recibir a un visitante. El objetivo es, determinar los aspectos distintivos de la gestión integral e inteligente de destinos turísticos, asumiendo como foco la perspectiva espacial-territorial. Se emplea un enfoque descriptivo y los métodos analítico-sintético, comparación, modelación esquemática a partir de la revisión bibliográfica de bases de datos internacionales. La estancia vivida en Islas Baleares, España; permite enriquecer la teoría una ejemplificación descriptiva. Se sistematizan los preceptos teórico-metodológicos, los vínculos entre las categorías referidas y los procesos que tienen lugar. Se concluye que, la perspectiva espacial (límites de nexos naturaleza sociedad) y territorial (límites de gobernanza político administrativa) junto a la calidad de las relaciones múltiples y la aplicación de los avances tecnológicos, configuran los aspectos clave de gestión integrada e inteligente que garantizan: calidad de vida a los residentes, experiencias a los turistas y sostenibilidad al destino.
What do we expect to visualize on the radiographs of mronj patients?
Authors: ÜNSAL Gürkan , ORHAN Kaan
Published: May 2021

Medication related osteonecrosis of the jaws (MRONJ) is a common complication of the bisphosphonates and other anti-resorptive drugs which are mainly used for osteoporosis, malignancy related hypercalcemia and distant bone metastases. While some imaging modalities are not successful at detecting Stage 0 MRONJ patients, some modalities such as Magnetic Resonance Imaging (MRI), can detect early MRONJ lesions. Early diagnosed MRONJ lesions are relatively easier to maintain and treat; thus, early diagnosis plays huge role in treatment. In this review main imaging modalities which are used in dentistry were evaluated regarding MRONJ.
APRESENTAÇÃO
Authors: Ribeiro Silvar Ferreira , Pinto Sônia Maria da Conceição , Santos Katiuscia Silva
Published: May 2021

A Revista REN9VE, surge como um espaço de debate, de afirmação e de fortalecimento da pesquisa e extensão no Departamento de Ciências Humanas e Tecnologias – DCHT, Campus XIX, da Universidade do Estado da Bahia, onde são ofertados cursos de graduação, Bacharelados em Ciências Contábeis e Bacharelado em Direito, além de um curso de pós-graduação stricto senso, vinculado ao PPGDC - Programa Multi-Institucional de Pós-Graduação em Difusão do Conhecimento. A oferta deste doutorado estimulou a comunidade acadêmica a refletir sobre a necessidade de ampliar as suas ações na área da pós-graduação, iniciando-se a elaboração de projetos de especialização lato senso nas áreas de contabilidade, direito e educação, além de um debate em torno da criação de mestrado na área da difusão do conhecimento. Este periódico vem atender estas demandas. Neste número concretiza-se o seu lançamento formal , constituindo-se como um periódico de divulgação científica, multidisciplinar, voltado para áreas de pesquisa e extensão diversificadas, característica bem acentuada nesta primeira edição, que traz artigos do campo do direito, da cultura indígena nos livros de língua portuguesa, da psicologia e da educação, passando nesta área pela educação a distância, educação infantil e as políticas públicas educacionais.
The development of perception in tennis
Authors: Micó Salvador Santiago , Martínez-Gallego Rafael , Vicente Rams José
Published: May 2021

This article provides coaches with a background to the concept of perception, defining it and linking it to the different components involved in certain specific motor tasks. The article then discusses theories that provide a framework to develop this aspect. Finally, it provides a practical set of specific exercises tennis players who want to improve their perceptive capacities, one of the keys to improving player performance.
Accepting the pressures of coaching: Insights into what experienced coaches learn with over 10 years-experience working with elite junior tennis players
Authors: Gowling Callum
Published: May 2021

Despite a growing body of research into sports coaching there is little understanding of what it is like to coach elite junior tennis players. The purpose of this study was to examine the experiences of 8 UK, experienced tennis coaches and describe what it is like to coach elite junior tennis players.  An Interpretative Phenomenological Analysis (IPA) of 8 experienced tennis coaches (over 10 years-experience) shows their insights into elite junior tennis coaching and provides avenues of comparison with the experiences of younger tennis coaches (Gowling, 2019).  This study found that (a) experienced tennis coaches described a panoramic view of coaching, (b) experienced coaches were confident in their coaching effectiveness, and (c) acceptance of challenges in coaching helped experienced coaches develop effective coping mechanisms to sustain their emotional well-being and motivation to coach for long careers.  The findings of this research contribute to an evolving, problematic epistemology of sports coaching and confirms that the experiences of existing coaches could contribute to more effective training of coaches.  The findings present governing bodies opportunities to inform coach education literature and help tennis coaches to sustain themselves in an emotionally challenging role.
Redução de danos e educação
Authors: Sodell Marcelo
Published: May 2021

A relação entre a área de Educação e o uso de drogas é fortemente atravessada pelos pressupostos proibicionistas. A consequência disso é que os projetos preventivos desenvolvidos no âmbito educacional balizados por esta postura de “guerra às drogas” fracassam, pois não conseguem alcançar o seu principal objetivo: impedir o consumo de drogas (abstinência total). Além de ineficazes, esses projetos preventivos contribuem negativamente para aumentar o estigma e o preconceito ao usuário de drogas, disseminado informações equivocadas sobre esse complexo fenômeno. Assim, o presente artigo tem como objetivo desenvolver um estudo de aproximação da noção de vulnerabilidade e da abordagem de Redução de Danos como novos fundamentos para a área de Educação, reafirmando a importância do rompimento definitivo com os pressupostos proibicionistas.
Futebol: entre o lazer e o controle
Authors: Kupper Agnaldo
Published: May 2021

O futebol moderno vincula-se ao industrialismo. Arrisco afirmar que a vida humana ocidental contemporânea aparenta partidas de futebol: embates, tempo medido, lutas pela titularidade e aceitação, torcidas agindo como partidos políticos, discussões de teses, improvisos, simbologias de socialização, teatralização da vida social, entre outros. Faz-se necessário entender como o brasileiro apropriou-se do esporte, como que o tomando das camadas mais abastadas que o introduziram no país. Nas primeiras décadas do século XX, o movimento operário brasileiro postou-se de forma ruidosa. A nascente burguesia industrial brasileira, inquieta diante das mobilizações sindicais proletárias, teria feito uso de mecanismos menos duros como apoiar e financiar o esporte que caíra nas graças operárias: o futebol. O resgate histórico-social de documentos de diversas agremiações permite observar interferências patronais no desenvolvimento clubista, controlando-as direta e/ou indiretamente. De lá para cá, o esporte seguiu sua trajetória, permeando políticas e ajustando conflitos pessoais.
Comunidade à mesa: a comensalidade em O Pai Goriot de Balzac
Authors: Dantas Rebekka Fernandes , Dantas Alexsandro Galeno Araujo
Published: May 2021

Nosso objetivo é compreender a comensalidade como um fenômeno da sociedade, que se modifica no mundo contemporâneo, a partir da obra O pai Goriot, de Balzac. A história se passa em uma pensão de um bairro decadente de Paris, chamada Casa Vauquer. Nesse ambiente, a mesa aparece como palco de práticas alimentares, bem como de desentendimentos e desarmonias na vida em grupo ou em comunidade. Que comunidade é essa? Para pensá-la utilizaremos as noções de comunidade inconfessável e inoperante de Maurice Blanchot e Jean-Luc Nancy. Essas comunidades não são possíveis na comunhão, mas sim no estranhamento. Com essa base pensamos na mesa da Casa Vauquer como um espaço de hostilidade e hospitalidade, que apresenta marcas do individual e do coletivo e onde prevalecem conflitos e desordens.
A judicialização do cais: o legicentrismo no estatuto do juiz
Authors: Lima Marcelo Rubin de
Published: May 2021

Este artigo investiga o papel social dos juízes nos conflitos sobre a revitalização do Cais Mauá em Porto Alegre-RS. As expectativas quanto às ações do juiz neste conflito estruturaram práticas sociais mobilizadas pelos atores envolvidos no conflito. A análise do material empírico indicou que os movimentos sociais esperam que o juiz atue segundo o conceito operacional de “legicentrismo social”, em que o juiz é percebido como aplicador da lei e protetor das pessoas desassistidas, aquelas que não conseguem acessar os espaços de tomadas de decisão da política administrativa do Estado. Esta noção coloca os magistrados diante de tensões sociais e expectativas que muitas vezes não podem ser correspondidas.
O gosto e o cheiro: práticas de consumo e diferenças regionais no Brasil
Authors: Nery Salete
Published: May 2021

O objetivo deste artigo é compreender o gosto do brasileiro pelo perfume. O Brasil é o segundo maior consumidor mundial de perfumes. Os produtos mais consumidos são os nacionais e massivos. Os maiores consumidores são pessoas das Classes C, D e E das regiões Norte e Nordeste, que, segundo dados do Instituto Brasileiro de Geografia e Estatística (IBGE) (2010), gastam familiarmente por mês mais com perfumes do que com arroz ou com educação. O ponto de partida é o debate sobre o suposto caráter supérfluo dos perfumes, à luz da particularidade sócio-histórica do Brasil. Daí buscamos compreender esse gosto a partir da relação daquilo que foi considerado pela pesquisadora Renata Aschcar como o cheiro do Brasil no século XX, a lavanda, a partir de um de seus produtos de destaque na história nacional da perfumaria: a Seiva de Alfazema criada pela Phebo.
Vidas Sob o Signo do Encanto: Ethos estético nos ofícios artísticos da Arte do Carnaval Carioca
Authors: Farias Edson Silva
Published: May 2021

Neste artigo importa discutir: no curso da discussão da sociologia da gloria e do reconhecimento, é possível estabelecer correlações entre uma estética tendo por fundamento o impacto das aparências em grandes multidões e um possível ethos atravessando escalas e circuitos de diferentes atividades, mas cuja identidade é fortemente definida pela tônica posta no encanto, na condução recursiva a sentidos orientadores dos emaranhados dos atos?
Reforma portuária, trabalho e ação sindical: O exemplo do porto de Itajaí-SC 2000-2016
Authors: Bozzano Gabriel
Published: May 2021

A proposta do artigo é avaliar o impacto de políticas públicas sobre o setor portuário brasileiro a partir do ciclo de reformas iniciado nos anos 2000, tomando como exemplo o caso do porto de Itajaí-SC. Especificamente, a intenção é demostrar o papel dos trabalhadores e sindicatos para a contestação dos efeitos mais nocivos dos processos de privatização portuária em curso nessa cidade. Analisamos como os sindicatos portuários construíram novas formas de cooperar e propor novas formas de organizar seus trabalhos, atuando, desse modo, para o direcionamento da política local de desenvolvimento portuário.
Discursos sobre regulação e governança algorítmica
Authors: Silveira Sergio Amadeu
Published: May 2021

O texto traz as práticas discursivas das principais pesquisas sobre a regulação e a governança dos algoritmos. Discorre sobre os elementos fundamentais que articulam os discursos em torno de sistemas algorítmicos e suas expressões como Big Data, machine learning e Inteligência Artificial (IA). Identifica os principais enunciados e expõe as controvérsias sobre regulação e as contraposições discursivas sobre os riscos e benefícios da implementação generalizada dos sistemas algorítmicos.
Conservadorismo coroado: movimentos monarquistas no Brasil atual
Authors: Quadros Marcos Paulo Reis
Published: May 2021

Partindo de um mapeamento dos grupos “restauracionistas” que atuaram entre o final do século XIX e a metade do século XX, o artigo posteriormente volta-se à análise dos posicionamentos da atual Casa Imperial Brasileira e de movimentos que a apoiam no tempo presente. Para tanto, vale-se especialmente de materiais disponíveis em portais monarquistas na internet e de entrevista realizada com um militante. A pesquisa sugere que os atuais grupos monarquistas tentam instrumentalizar a crise política instalada no Brasil da segunda década do século XXI, somando-se a movimentos conservadores mais amplos que se espalham pela sociedade. Além da restauração e da denúncia da instabilidade que seria inerente à República, os monarquistas de hoje centram seus discursos na oposição às esquerdas e na valorização dos princípios cristãos.
Pengunaan Bilik Swab Pencegah Risiko Penularan Penyakit Infeksius di RS TNI AD Palangka Raya
Authors: Audina Munthe Ervi , Permatasari Silvani , Immanuela Toemon Agnes , Sasmithae Lia
Published: May 2021

WHO merekomendasikan pengambilan spesimen untuk diagnosis COVID-19 pada dua lokasi, yaitu dari saluran napas atas (swab nasofaring atau orofaring) atau saluran napas bawah [sputum, bronchoalveolar lavage, atau aspirat endotrakeal]. Tenaga medis harus memperhatikan keselamatan kerja dengan menggunakan APD (alat pelindung diri) yang tepat karena adanya kontak langsung dengan pasien terduga COVID-19 ketika mengambil sampel yang berisiko tinggi terinfeksi. Kasus COVID-19 di Indonesia meningkat setiap hari dan harga APD melambung tinggi dan terjadi kelangkaan. Mencermati kejadian tersebut maka sebagai wujud implementasi Tri Dharma Perguruan Tinggi, dosen UPR mengambil peran aktif dalam pengabdian masyarakat melalui program dosen pendukung SDM unggul untuk memberikan bilik swab dalam melindungi tenaga medis dari penyebaran infeksi secara langsung. Target dalam pelaksanaan pengabdian masyarakat ini adalah RS TNI-AD Palangka Raya. Metode yang digunakan adalah metode serah-terima alat dan demonstrasi pemakaian sebagai solusi kepada mitra yaitu RS TNI-AD Palangka Raya. Kesimpulan dari program pengabdian ini dengan adanya pemanfaatan bilik swab di RS dapat meminimalisir paparan penyebaran infeksi secara langsung ke tenaga medis serta sebagai alternatif  saat krisis kelangkaan APD level 3
Đánh giá hiệu quả giảm đau sau phẫu thuật thay khớp háng của phương pháp gây tê cơ vuông thắt lưng liên tục dưới hướng dẫn siêu âm
Authors: Phương Vũ Hoàng , Tuấn Hoàng Văn
Published: May 2021

Nghiên cứu nhằm mục tiêu đánh giá tác dụng giảm đau và các tác dụng không mong muốn của phương pháp gây tê liên tục cơ vuông thắt lưng dưới hướng dẫn siêu âm sau phẫu thuật thay khớp háng. 30 bệnh nhân phẫu thuật thay khớp háng theo chương trình được được giảm đau sau mổ bằng phương pháp gây tê cơ vuông thắt lưng liên tục dưới hướng dẫn của siêu âm tại Trung tâm Gây mê và Hồi sức ngooại khoa – Bệnh viện Việt Đức từ tháng 4 đến tháng 8 năm 2019. Thời gian thực hiện kĩ thuật, vùng phong bế cảm giác, điểm đau VAS khi nghỉ và khi vận động, mức độ hài lòng của bệnh nhân và số lượng morphin tiêu thụ và một số tác dụng không mong muốn được ghi lại trong 48 giờ sau mổ. Thời gian thực hiện kĩ thuật trung bình là 16,03 ± 2,80 (phút). 100% người bệnh phong bế được thần kinh chậu bẹn chậu hạ vị; 96,7% phong bế được thần kinh đùi và thần kinh bì đùi ngoài; 70% phong bế được thần kinh sinh dục đùi và 50% phong bế được thần kinh bịt. Điểm VAS trung bình khi nghỉ đều < 3 và khi vận động đều xấp xỉ 4 ở tất cả các thời điểm. Có 1 bệnh nhân phải giải cứu bằng morphin với tổng liều 36 mg và 96,7% bệnh nhân có mức độ hài lòng và rất hài lòng. Nghiên cứu của chúng tôi cho thấy gây tê cơ vuông thắt liên tục dưới hướng dẫn siêu âm có hiệu quả giảm đau tốt sau mổ cho các phẫu thuật thay khớp háng.
Giá trị của cắt lớp vi tính trong chẩn đoán thiếu máu ruột ở bệnh nhân tắc ruột non
Authors: Hùng Nguyễn Duy , Huệ Nguyễn Hoa , Ngân Vương Kim
Published: May 2021

Giá trị của cắt lớp vi tính trong chẩn đoán thiếu máu  ruột ở bệnh nhân tắc ruột non. Phương pháp hồi cứu mô tả trên 146 bệnh nhân tắc ruột non chụp cắt lớp vi tính và phẫu thuật tại Bệnh viện Hữu nghị Việt Đức từ tháng 8 năm 2018 đến tháng 6 năm 2020. Tổn thương gồm các dấu hiệu gợi ý thiếu máu  ruột trong tắc ruột non được mô tả trên cắt lớp vi tính sau đó đối chiếu với kết quả phẫu thuật để đưa ra độ nhạy, độ đặc hiệu, giá trị chẩn đoán dương tính, âm tính và tính chính xác chẩn đoán. Kết quả: nguyên nhân do thoát vị và do dây chằng là nguyên nhân chủ yếu có biến chứng thiếu máu  ruột, chiếm lần lượt 33,3% và 31,0%; dịch tự do ổ bụng có độ nhạy cao nhất, 83,3%; các dấu hiệu thành ruột ngấm thuốc kém hoặc không ngấm, quai ruột hình bia , khí trong thành ruột, khí trong khoang phúc mạc có độ đặc hiệu cao 93 - 99%. Kết luận: dấu hiệu thành ruột ngấm thuốc kém hoặc không ngấm thuốc, khí trong thành ruột, khí trong khoang phúc mạc có độ đặc hiệu và giá trị cao trong chẩn đoán thiếu máu  ruột, dấu hiệu quai ruột hình bia có giá trị chẩn đoán thiếu máu ruột giai đoạn sớm.
Bose-Einstein Condensation and Supersolids
Authors: Alexanian Moorad , Mkrtchian Vanik E.
Published: May 2021

We consider interacting Bose particles in an external potential. It is shown that a Bose-Einstein condensate is possible at finite temperatures that describes a super solid in three dimensions (3D) for a wide range of potentials in the absence of an external potential. However, for 2D, a self-organized super solid exists for finite temperatures provided the interaction between bosons is nonlocal and of infinitely long-range. It is interesting that in the absence of the latter type of potential and in the presence of a lattice potential, there is no Bose-Einstein condensate and so in such a case, a 2D super solid is not possible at finite temperatures. We also propose the correct Bloch form of the condensate wave function valid for finite temperatures, which may be used as the correct trial wave function.
The Financial Crises of 1929 and 2008: What Lessons Learned from the COVID-19 Health Crisis?
Authors:   University of Moncton, Avelé Donatien
Published: May 2021

Reading the history of economic and financial crises bears witness to the unprecedented and unprecedented nature of the COVID-19 pandemic. To complete our reflection, we are discussing the impact of the COVID-19 pandemic in connection with macroeconomic instability. This short reflection answers the question of whether the lessons learned from the crises of the past can serve the major international financial players in the future
Primary Oxide Minerals in the Layered Series of the Muskox Intrusion
Authors: Irvine T. N. , Smith C. H.
Published: May 2021

The layered series of the Muskox intrusion consists of 42 layers of 18 different rock types and has a total thickness of about 6,500 feet. The series ranges with much repetition from dunite at the base, through peridotite and various pyroxenites and gabbros, to a discontinuous capping of granophyre. The layers are accumulations of mineral grains fractionally crystallized and settled from basaltic magma, and the sequence of layers reflects the order of crystallization of the minerals periodically interrupted by the introduction of fresh magma. The primary oxide minerals are chromite, magnetite and ilmenite.

Chromite occurs as tiny octahedral crystals. It is disseminated in amounts of 1–3 percent (by volume) throughout layers of dunite and peridotite having a total thickness of about 4,000 feet, and it is concentrated in two thin layers in peridotite just below orthopyroxenite layers. Textural, modal and chemical data show that the chromite crystallized simultaneously with olivine, and the thin concentrated layers apparently formed as a result of gravity sorting accompanying a change in crystallization from relatively coarse olivine to finer-grained orthopyroxene. Chromite ceased to precipitate when pyroxene began to form.

The magnetite and ilmenite are settled minerals in granophyre-bearing gabbro near the top of the intrusion. Magnetite was first to crystallize and co-precipitated with plagioclase and pyroxene in amounts of 3–5 percent. With the appearance of ilmenite, the two oxide minerals generally total 8–10 percent. The settled grains of magnetite have equant forms; those of ilmenite, a distinctive platy habit. The magnetite commonly shows lamellae of ilmenite probably formed by "exsolution" in response to deuteric or later oxidation. The parent liquid of the magnetite and ilmenite apparently was fairly rich in FeO and TiO2 but did not have an exceptionally large content of Fe2O3.

The crystallization relations of the Muskox oxide minerals obey closely certain theoretical rules of fractional crystallization and are generally consistent, both qualitatively and quantitatively, with available phase equilibria data. They may therefore be applicable in other intrusions, in which case they place some fairly stringent limitations on processes of fractional crystallization as possible means of producing ore-grade deposits of chromite, magnetite and ilmenite.
Origin of Chromite Seams in the Hartley Complex of the Great Dyke, Rhodesia
Authors: Bichan R.
Published: May 2021

The Great Dyke of Rhodesia consists of 4 ultrabasic lopolithic complexes, each of which can be divided into a series of synclinal units; these are numbered Unit 1, Unit 2, Unit 3, etc., from the top to the bottom of each lopolith. The present investigations, based on numerous diamond drill cores, is concerned with Unit 2 in the Hartley Complex of the Dyke and, in particular, with the origin of the two chromite seams it contains. A typical vertical section is: Unit 1, Gabbroic rocks; Unit 2, Pyroxenite, olivine in basal part—470 feet, Picrite and harzburgite—150 ft., Chromite Seam No. 1—10 in., Harzburgite—80 ft., Chromite Seam No. 2—14 in., Unit 3, Pyroxenite, etc.

Detailed examination has been made on the petrographic and stratigraphic relations of the two chromite seams and the contact of Units 2 and 3, and the chemical composition of whole rocks and co-existing chromite and olivine.

These studies indicate that Unit 2 was formed from two magmatic inflows, the first occurring before complete crystallization of the pyroxenites of Unit 3 had taken place and the second well before crystallization of the first inflow had been completed.
Precambrian Iron Deposits in Missouri
Authors: Snyder Frank G.
Published: May 2021

New discoveries made over the past several years indicate that Southeast Missouri is a major iron province. The ten known iron occurrences include three major deposits.

The ore occurs as magnetite, with minor amounts of hematite, in Precambrian rhyolites and andesites. Iron mineralization may be conformable with flow structures of volcanic rocks or may be sharply disconformable. Ore bodies, overlain by up to 2,000 feet of Lower Paleozoic sediments, may be at the Precambrian outcrop or subcrop, or within upper Precambrian. Their presence is indicated by strong sharp magnetic anomalies.

Published age dates of rocks from Missouri range from 1.1 b.y. to 1.5 b.y. At Pea Ridge ore body, the rhyolite host and a post-ore dike cutting the ore body give essentially the same age, within the limits of error, of 1.3 b.y.

Deformation due to magmatic pressures that accompanied or immediately followed igneous activity is believed to be the major factor localizing the deposits. The iron could have been derived by differentiation of granitic magma or from hydrothermal alteration of older basic rocks. Presently available evidence suggests that it was derived from the granitic magma.
Nickel Sulfide Ores Related to Ultrabasic Intrusions in Canada
Authors: Kilburn L. C. , Wilson H. D. B. , Graham A. R. , Ogura Y. , Coats C. J. A. , Scoates R. F. J.
Published: May 2021

Canadian nickel sulfide ores related to ultrabasic rocks are divided into two categories based on geological environment. The Orogenic category is related to ultrabasic intrusions localized along or adjacent to major faults, whereas the Volcanic category is distributed throughout thick volcanic sequences as interflow sills and dikes.

In both the orogenic and volcanic categories, nickel sulfide deposits occur as disseminations within the ultrabasic intrusion, as massive and stringer zones at the ultrabasic contact, and as massive and stringer zones within the adjacent wall rocks.

The normal sulfide assemblage in most deposits is relatively simple, and comprises the primary minerals pyrrhotite, pentlandite, pyrite, chalcopyrite, and magnetite, usually in that order of abundance. Important exceptions are millerite, pentlandite, pyrite and chalcopyrite at Marbridge No. 2, Quebec and unusually high pyrite contents at Shebandowan, Ontario.

Petrographic studies reveal a pattern of progressive recrystallization with serpentinization. Increased serpentine grain size with recrystallization leads to displacement of sulfide minerals and finally complete destruction of primary silicate-sulfide textures.

In the Orogenic category, ultrabasic rocks are predominantly peridotite and pyroxenite; disseminated sulfide is the most common mode of occurrence, irregularly distributed throughout the ultrabasic intrusion; contact deposits are encountered less frequently and deposits in the wall rocks are rare. In the Volcanic category, ultrabasic rocks are predominantly peridotite with gabbro; contact deposits are most common; disseminated deposits are less common; and wall rock deposits are rare.
Discussion of Papers Concerned with Sulfide Deposits
Authors: Naldrett A. J.
Published: May 2021

In this discussion I make no pretence of covering all the papers that were concerned with sulfide ore deposits but restrict myself to three or four that touch on problems of particular interest to me. The paper by Souch, Podolsky, et al. (this volume) on the ores of the Sudbury district contains much factual information that has an important bearing on the hypotheses that we may propose for the origin and emplacement of the ores. Data from my own recent study (Naldrett and Kullerud, 1966) of the Strathcona Mine point to hypotheses similar to those suggested by the evidence in Souch et al.'s paper. Accordingly, I will first consider the Sudbury ores, touching on problems such as the nature of the Nickel Irruptive and the emplacement of the sulfide ores. Following this I will discuss the papers describing nickel deposits associated with ultramafic rocks.