bluuebunny/crossref_metadata_2025 huggingface dataset:
INCIDENCIA Y EL CONTROL DE HYPSIPHYLA GRANDELLA ZELLER EN PLANTAS DE SWIETENIA MACROPHYLLA KING.
Authors: Justiniano Aguada Cristian Antonio
Published: April 2023

El presente estudio tiene el objetivo de evaluar de la incidencia y el control de la Hypsiphyla grandella Zeller en plantas de Swietenia macrophylla King., durante el segundo año de desarrollo en el lugar definitivo. El material vegetal de Swietenia macrophylla King., fueron establecidas con anterioridad de ocho meses. El Insecticida empleado para el control de la Hypsipylla grandella Zeller fue Monomor-600 principio activo Monocrotophos 60% CE. El procedimiento experimental consistió en la aplicación del insecticida al 50% de las plantas en una dosis de 1 ml/litro de agua con intervalos de 30 días durante doce meses, paralelamente a la aplicación del insecticida se registraron la incidencia del insecto, estado de la planta, el crecimiento y la mortalidad. Las condiciones climáticas registradas durante la investigación fueron: temperatura promedio de 25,5ºC, mínima de 20,0ºC, máxima de 31,0ºC y precipitación total de 1788,9 mm fueron las óptimas para el desarrollo de la mara. La incidencia de Hypsipylla grandella Zeller fue del 19,2%. El mayor ataque se presentó en el mes de diciembre (10,8%), seguido de enero (7,5%) y marzo el mes con menor ataque (0,8%). A pesar de que el ataque fue relativamente menor en las plantas que recibieron tratamiento preventivo respecto a los que no recibieron, no se observó diferencia estadística significativa. El efecto del insecticida Monomor 60% CE, sobre el estado final de las plantas que fueron atacadas por la Hypsipylla grandella Zeller, indican que la mayor proporción quedaron con deformaciones severas en el tallo (38,5% - 40%) seguidos por aquellos con deformación leve (30,0% - 30,8%), no observándose diferencia significativa entre plantas con tratamiento respecto a los sin tratamiento. Durante el periodo de estudio se observó la mortalidad del 10% de plantas, de los cuales 5% se registró en el mes de febrero y los demás en los meses de enero (2,5%) y marzo (2,5%). En los doce meses de estudio se observaron incrementos de 132,2 y 134,4 cm en plantas con y sin tratamiento, respectivamente con promedios de 11,0 y 11,2 cm/mes. El diámetro del tallo registró incrementos de 14,1 y 15,4 mm con promedios de 1,2 y 1,3 mm/mes.
EN BUSCA DE UNA TECNOLOGÍA PORTÁTIL PARA LA PURIFICACIÓN DE AGUAS CONTAMINADAS POR INUNDACIONES EN LA AMAZONÍA
Authors: Loma Marcelo Iván Saavedra
Published: April 2023

El agua potable es fundamental para la vida humana y el desarrollo económico y social, pero en muchas partes del mundo la escasez de agua potable es un grave problema que afecta a millones de personas. Esta escasez se debe a una combinación de factores, como el aumento creciente de la población, la contaminación de fuentes de agua y el cambio climático. La Amazonía es una región de gran importancia ecológica y biodiversidad, pero también es vulnerable a desastres naturales como las inundaciones, que pueden contaminar el agua potable de la región y afectar gravemente la salud de la población local. El cambio climático en nuestro planeta es un hecho evidente y tangible que afecta a cada localidad, comunidad, ciudad y región en diferentes formas. En la región amazónica, las inundaciones se están dando con mayor regularidad e intensidad debido al calentamiento global. Por lo tanto, es necesario que los habitantes de la Amazonía cuenten con tecnologías portátiles y eficientes para la purificación de aguas contaminadas por desastres naturales, especialmente las inundaciones. En la actualidad, se han desarrollado varios dispositivos para purificar el agua contaminada, pero su disponibilidad, costo y acceso en la región amazónica es altamente limitado. Por lo tanto, es necesario desarrollar una tecnología local y asequible para la purificación de aguas contaminadas por inundaciones en la Amazonía. En este artículo, exploraremos algunas de las opciones tecnológicas disponibles y discutiremos sus ventajas y desventajas. También abordaremos el desafío de hacer que estas soluciones sean asequibles y accesibles para la población local.
INCIDENCIA DE GARRAPATAS DE LOS GÉNEROS IXODES, RHIPICEPHALUS, DERMACENTOR, AMBLYOMMA Y HAEMAPHYSALIS EN (CANIS FAMILIARIS) EN UNA ÁREA URBANA
Authors: Arrazola Verónica Flores , Poma Juan Pablo Catari , Nogales Carola Cecilia Sempertegui , Monasterio Emilio Román
Published: April 2023

El presente trabajo titulado “Determinación de la prevalencia de garrapatas de los géneros Ixodes, Rhipicephalus, Dermacentor, Amblyomma, Haemaphysalis en Canis familiaris en el área urbana del municipio de Puerto Rico, Pando Bolivia 2020”; El municipio de Puerto Rico cuenta con 2.672 habitantes, según el último censo de 2012 realizado por el (INE), cuenta con 10 barrios, se obtuvo el siguiente resultado de 402 canes (perros) censados en el presente trabajo encontramos 3 perros con Rhipicephalus (garrapata marrón) equivalente al 0,77 %, un can con Rhipicephalus sanguineus, de raza criollo de sexo macho menor a un año (barrio Progreso), dos perros con Rhipicephalus sanguineus (Barrio Amazónico) de raza criolla de uno a dos años, en los otros ocho barrios no se reportó ningún caso de perros con garrapatas. Para identificar o tipificar a la Rhipicephalus, solo se consideró a las garrapatas adultas, la Rhipicephalus hembra, llega a medir un aproximado de 10cm. Las (hembras adultas) tienen el cuerpo color marrón oscuro, cuatro pares de patas son de color marrón rojizo a su vez presentan escases de espolones, rostrum corto, base del gnatossoma o capitulun de forma hexagonal, en las hembras el escudo protector corto, presenta gran números de poros de tamaño pequeño e uniformemente distribuidos, presentas surcos tanto en la región dorsal como en la región abdominal.
MANEJO Y CONSERVACIÓN DE LA SOLANUM MELONGENA L. UTILIZANDO TECNOLOGÍA DE ATMÓSFERAS MODIFICADAS
Authors: Bautista Choque Ronald Williams , Garcia Eduardo Mendoza
Published: April 2023

El Manejo Pos cosecha es muy importante en todos los productos hortofrutícolas ya que la mayor perdida en porcentaje de estos alimentos ocurre en la cosecha, por esta razón el manejo tiene gran importancia después de la cosecha. Existen varios aspectos a los que engloba el tema de Manejo Pos cosecha como: almacenamiento, conservación, transporte y comercialización. La conservación es uno de los factores más importantes y cuenta con varias tecnologías para alargar la durabilidad de los productos. El presente estudio pretende evaluar el comportamiento de las Berenjenas en un periodo de tiempo determinado aplicando tecnología de Atmosferas Modificadas mixtas (pasiva y activa) en el manejo pos cosecha de estos frutos, para lograr la conservación de este producto por un tiempo de 3 semanas sin alterar significativamente las características físicas, químicas y organolépticas. En los resultados observamos una gran respuesta a la tecnología aplicada, obteniendo un producto sin daños de ningún tipo y apta para el consumo humano.
INFORMAÇÃO SOCIOAMBIENTAL: RELATO DE EXPERIÊNCIA DE UMA BRINQUEDOTECA COMUNITÁRIA
Authors: Alves Renato Marques , Queiroz Marcio Pedro Carvalho Pataro , Oliveira Lúcia Marisy Souza Ribeiro de , Oliveira Adelson Dias de , Duarte Francisco Ricardo
Published: April 2023

O relato aqui apresentado é o resultado do projeto de extensão “Brinquedoteca Comunitária” que tem a finalidade de promover atividades culturais e a disseminação de informações socioambientais para crianças de escolas públicas. A educação ambiental é vista como ferramenta poderosa para mudança de mentalidade do indivíduo e, consequentemente, para a construção de sociedades sustentáveis. Com base nisso, foi proposto um serviço de disseminação de informação socioambiental para as Escolas Municipais Infantis (EMEI) localizadas na cidade de Juazeiro-BA e adjacências organizado pela brinquedoteca comunitária do Espaço Plural da Universidade Federal Vale do São Francisco para apresentação do sistema de produção de alimentos (Sisteminha Espaço Plural). Na visita de campo os alunos e professores recebem orientações sobre as hortaliças, legumes e frutas. Exploram livremente os canteiros e pomar das frutas, assim como, as instalações dos animais, das aves e o reservatório de peixes. Toda essa vivência gera nos participantes uma rica aprendizagem sobre temas como saúde, segurança alimentar, sustentabilidade e preservação da biodiversidade para uma maior resiliência do bioma caatinga.
TERREIRO SUSPENSO: UMA ALTERNATIVA PARA SECAGEM GRÃOS NA AGRICULTURA FAMILIAR
Authors: Santana Weslley Nunes , Borges João Paulo Goes da Silva , Viana Jeandson Silva , Gonçalves Edilma Pereira , Araujo Vanyelle Raquel Pereira de , Santos Danilo de Lima , Silva Maria Beatrice Gueiros , Silva Jessica Lidiane da , Silva Maria Camila Cordeiro da
Published: April 2023

Essa pesquisa teve como objetivo desenvolver tecnologia alternativa para secagem de grãos em terreiro suspenso, por meio de materiais reciclados como uma possibilidade para agricultores familiares. O trabalho foi desenvolvido em campo experimental da Universidade Federal do Agreste de Pernambuco – UFAPE, escolhida levando em consideração a declividade do terreno (< 5%), ausência de árvores que pudessem prejudicar a luminosidade, facilidade de acesso e proximidade da área de cultivo. Para construção do terreiro suspenso utilizou-se resto de madeira oriundo de construções de prédio da UFAPE, plástico transparente e sombrite de 50%, pregado em retângulo de com dimensões de 0,9x0,5x1,35m, ALC. Para avaliação da eficiência na secagem de grãos foram utilizadas amostras de soja da cultivar BRS Domínio, sendo inicialmente determinado o teor de água dos grãos pelo método de estufa a 105º ± 2º. Para fim de controle da metodologia foi verificada a temperatura e umidade do interior do terreiro suspenso com auxílio de termo-higrômetro digital. Os principais resultados demostram uma eficiência dessa tecnologia na secagem de grãos de soja, de modo que as temperaturas internas do terreiro suspenso variaram de 15 a 50°C, com umidade variando de 22% durante a noite e 99% durante o dia. A curva de secagem dos grãos atingiu ponto máximo com duração equivalente a 83 horas, nesse ponto especifico os grãos apresentaram um teor de água de 8,52%, valor dentro da faixa ideal para armazenamento. O terreiro suspenso construído com material reciclável foi eficiente no aumento da temperatura interna e na diminuição da umidade relativa, contribuindo para a secagem de grão de soja da Cultivar “BRS Domínio”, sendo uma tecnologia barata para agricultores familiares na secagem de grãos.
IDENTIFICAÇÃO DE UMA PONTE MIOCÁRDICA EM CORAÇÃO DO ACERVO DA FACULDADE DE MEDICINA DO MUCURI: UM RELATO DE CASO E SUAS REPERCUSSÕES CLÍNICAS
Authors: Martins JLO , Prates RKP , Almeida TMO , Brant FP , Abreu BJ , Amaral EA
Published: April 2023

O presente trabalho teve como objetivo relatar a identificação de ponte miocárdica em uma peça anatômica da Faculdade de Medicina do Mucuri (FAMMUC). Durante discussões nas reuniões da Liga de Ciências Morfofuncionais Aplicadas, alguns alunos manifestaram interesse em pesquisar sobre as variações anatômicas das artérias coronárias. Em um coração pertencente ao acervo da FAMMUC, foi identificada a presença de uma ponte miocárdica (PM) na artéria interventricular anterior, ramo da artéria coronária esquerda. Diante deste achado, abordou-se a relevância clínica da ponte miocárdica, admitindo-se que é imprescindível o conhecimento desse tipo de variação anatômica, principalmente por cardiologistas, pois é bem estabelecida a associação entre PMs e complicações cardiovasculares, como isquemia e síndrome coronariana aguda. Esse achado ressalta a importância do estudo e identificação das variações anatômicas, pois tal conhecimento tem um impacto didático sobre o aprendizado em anatomia humana e poderá ter implicações na sua futura prática profissional.
PLANTAS UTILIZADAS NA ALIMENTAÇÃO ANIMAL CONHECIDAS POR ESPECIALISTA LOCAIS EM UMA COMUNIDADE DE FUNDO DE PASTO, EM JUAZEIRO-BA
Authors: Costa Erilva Machado , Pifano Daniel Salgado , Yamamoto Sandra Mari
Published: April 2023

Objetivo: este estudo teve como objetivo registrar os saberes sobre usos das plantas que são utilizadas na alimentação animal na Comunidade Tradicional de Fundo de Pasto Cano, no município de Juazeiro, na Bahia. Métodos: para coleta de dados realizou-se uma abordagem etnobotânica, utilizando método de amostragem não-probabilístico, utilizando a técnica bola de neve (snowball sampling). Para a obtenção da lista de espécies conhecidas pelos informantes-chave, especialistas sobre as plantas, utilizou-se a técnica de lista livre. Resultados: os informantes-chave citaram 10 plantas, distribuídas entre três famílias botânicas e nove gêneros representados por 10 espécies botânicas. Entre as famílias botânicas, a Fabaceae apresentou maior riqueza de espécies. A espécie mais citada foi a Leucaena leucocephala (leucena). A maioria das espécies são de hábito de crescimento arbóreo, que se propagam em fragmentos de remanescentes florestais. Conclusão: constatou-se que há uma maior preferência por espécies nativas, demonstrando, assim, uma forte dependência da população da comunidade pela vegetação nativa. Apesar do reduzido número de espécies citadas, os conhecimentos aqui registrados poderão ser como subsídios para outras pesquisas relacionadas aos potenciais nutricionais das espécies citadas, às práticas adequadas de conservação e preservação das espécies, principalmente as espécies nativas, assim como auxiliar nas tomadas de decisões para criação de políticas públicas voltadas para o incentivo de produção de sistemas agroecológicos e preservação da agrobiodiversidade.
Behavioral Insight
Authors: Fazekas-Pátyodi Szandra
Published: April 2023

Aim: The MIT Press Essential Knowledge series provides the reader with accessible, concise, yet interesting and completely up-to-date information. Till now, we have reviewed the following members of the series: Neuroplasticity (Németh, 2021a), Anticorruption (Németh, 2021b), Collaborative Society (Németh & Szabo, 2022), Critical Thinking (Németh, 2022b).Methodology: Each part was written by excellent experts on the subject, in a language understood by non-experts, too. In this way, the current research data and results in the field of each topic can be really used. Nowadays, it is not easy to find in the endless set of information obtainable on the World Wide Web those that essentially provide the fundamental knowledge on a particular topic (Tidor, 2020).Findings: Behavior insight examines the current and possible later relationship between conscious thinking and unconscious action processes. It also examines how to develop and use it ethically to the benefit of humanity.Value: The book presents the importance of conscious thinking and action, which is so far only known to scientists.
Fukushima Nükleer Santral Kazası Gazete Manşetlerinin İçerik Yönünden İncelenmesi ve Enerji Gazeteciliğinin Türkiye’deki Durumu
Authors: GÜNALTAY Aybüke , TÜRKAN Nureddin
Published: April 2023

Bir kaza yada doğal felaket anında yapılan bilinçli haber ve yönlendirmelerin, toplum ve halk sağlığı açı-sından önemi büyüktür. Bu kaza yada doğal felaketlerin bilinçli haberler halinde yapılmasında AFET ve enerji gazeteciliği öne çıkmaktadır. Böylece, oluşabilecek maddi-psikolojik-zihinsel zararların önün geçil-mesinde ve bu zararların en aza indirilmesinde AFET ve enerji muhabirliği hayati önem taşımaktadır. Özellikle gelişmiş ülkelerde, bu alanlardaki gazete muhabirliğine oldukça fazla önem verilmekte ve böylece toplumundaki her yaştan bireylerin fiziksel ve zihinsel zararlardan korunması için önlem alınmaktadır. Bu alanlardaki haber yayıncılığı ve gazete muhabirliğinin eksikliği, geçmişte 1986 yılında Çernobil’de meyda-na gelen reaktör kazası sırasında ülkemizi olumsuz etkilemiştir. Kazanın olduğu o yıllarda, ülkemizde bu tür felaketlere karşı halkı doğru şekilde aydınlatma ve algıyı sağlıklı bir şekilde yönetme becerisinde de eksiklikler yaşanmıştır. Kaza gerçekleştikten sonra Karadeniz’de üretilen çaylarda ölçülen 25000 Bq/Kg civarı radyasyon nedeni ile yaklaşık 59000 ton çay tüketilmeden toprağa gömülmüştür. Oysaki günümüzde halen Almanya, doz ölçümü 80000 Bq/kg seviyelerine varan çayları gümrüğünden ülkesine kabul etmekte-dir. Ayrıca yine aynı yıllarda ülkemizde et kalitesinin en değerli olduğu Van bölgesinin et üreticileri de bu felaketten ekonomik olarak etkilenmiştir. Bu etlerin ölçülen radyasyon dozları 20 Bq civarı olup, tonlarca et ihraç edilemediğinden gümrüklerde çürümüştür. Oysa ki, daha sonra ihtiyaç duyulan 150-200 Bq’lik etler ithal edilmişti. Bu çalışmada, 2011 yılında Japonya Fukushima’da meydana gelen nükleer reaktör kazası ile ilgili ülkemizdeki ve dünyadaki belirli gazetelerde çıkan haberlerle ilgili başlıklar incelenerek enerji gazeteciliğinin Türkiye’deki durumu ele alınacaktır.
Testing the Interaction between a Substellar Companion and a Debris Disk in the HR 2562 System
Authors: Zhang Stella Yimiao , Duchêne Gaspard , De Rosa Robert J. , Ansdell Megan , Konopacky Quinn , Esposito Thomas , Chiang Eugene , Rice Malena , Matthews Brenda , Kalas Paul , Macintosh Bruce , Marchis Franck , Metchev Stan , Patience Jenny , Rameau Julien , Ward-Duong Kimberly , Wolff Schuyler , Fitzgerald Michael P. , Bailey Vanessa P. , Barman Travis S. , Bulger Joanna , Chen Christine H. , Chilcotte Jeffrey K. , Cotten Tara , Doyon René , Follette Katherine B. , Gerard Benjamin L. , Goodsell Stephen , Graham James R. , Greenbaum Alexandra Z. , Hibon Pascale , Hung Li-Wei , Ingraham Patrick , Maire Jérôme , Marley Mark S. , Marois Christian , Millar-Blanchaer Maxwell A. , Nielsen Eric L. , Oppenheimer Rebecca , Palmer David W. , Perrin Marshall D. , Poyneer Lisa A. , Pueyo Laurent , Rajan Abhijith , Rantakyrö Fredrik T. , Ruffio Jean-Baptiste , Savransky Dmitry , Schneider Adam C. , Sivaramakrishnan Anand , Song Inseok , Soummer Remi , Thomas Sandrine , Wang Jason J. , Wiktorowicz Sloane J.
Published: April 2023

The HR 2562 system is a rare case where a brown dwarf companion resides in a cleared inner hole of a debris disk, offering invaluable opportunities to study the dynamical interaction between a substellar companion and a dusty disk. We present the first ALMA observation of the system as well as the continued Gemini Planet Imager monitoring of the companion’s orbit with six new epochs from 2016 to 2018. We update the orbital fit, and in combination with absolute astrometry from GAIA, place a 3σ upper limit of 18.5 M

J
on the companion’s mass. To interpret the ALMA observations, we used radiative transfer modeling to determine the disk properties. We find that the disk is well resolved and nearly edge-on. While the misalignment angle between the disk and the orbit is weakly constrained, due to the short orbital arc available, the data strongly support a (near) coplanar geometry for the system. Furthermore, we find that the models that describe the ALMA data best have inner radii that are close to the companion’s semimajor axis. Including a posteriori knowledge of the system’s SED further narrows the constraints on the disk’s inner radius and places it at a location that is in reasonable agreement with (possibly interior to) predictions from existing dynamical models of disk truncation by an interior substellar companion. HR 2562 has the potential over the next few years to become a new test bed for dynamical interaction between a debris disk and a substellar companion.
TOI-5375 B: A Very Low Mass Star at the Hydrogen-burning Limit Orbiting an Early M-type Star*

†
Authors: Lambert Mika , Bender Chad F. , Kanodia Shubham , Cañas Caleb I. , Monson Andrew , Stefánsson Gudmundur , Cochran William D. , Everett Mark E. , Gupta Arvind F. , Hearty Fred , Kobulnicky Henry A. , Libby-Roberts Jessica E. , Lin Andrea S. J. , Mahadevan Suvrath , Ninan Joe P. , Parker Brock A. , Robertson Paul , Schwab Christian , Terrien Ryan C.
Published: April 2023

The Transiting Exoplanet Survey Satellite (TESS) mission detected a companion orbiting TIC 71268730, categorized it as a planet candidate, and designated the system TOI-5375. Our follow-up analysis using radial-velocity data from the Habitable-zone Planet Finder, photometric data from Red Buttes Observatory, and speckle imaging with NN-EXPLORE Exoplanet Stellar Speckle Imager determined that the companion is a very low mass star near the hydrogen-burning mass limit with a mass of 0.080 ± 0.002M
☉ (83.81 ± 2.10M

J
), a radius of

0.1114

−
0.0050

+
0.0048

R

☉

(1.0841

0.0487

0.0467

R

J

), and brightness temperature of 2600 ± 70 K. This object orbits with a period of 1.721553 ± 0.000001 days around an early M dwarf star (0.62 ± 0.016M
☉). TESS photometry shows regular variations in the host star’s TESS light curve, which we interpreted as an activity-induced variation of ∼2%, and used this variability to measure the host star’s stellar rotation period of

1.9716

−
0.0083

+
0.0080

days. The TOI-5375 system provides tight constraints on stellar models of low-mass stars at the hydrogen-burning limit and adds to the population in this important region.
Validation of TOI-1221 b: A Warm Sub-Neptune Exhibiting Transit Timing Variations around a Sun-like Star
Authors: Mann Christopher , Lafreniére David , Dragomir Diana , Quinn Samuel N. , Tan Thiam-Guan , Collins Karen A. , Howell Steve B. , Ziegler Carl , Mann Andrew W. , Stassun Keivan G. , Kristiansen Martti H. , Osborn Hugh , Boyajian Tabetha , Eisner Nora , Hellier Coel , Ricker George R. , Vanderspek Roland , Latham David W. , Seager S. , Winn Joshua N. , Jenkins Jon M. , Villaseñor Jesus Noel , McLean Brian , Rowden Pamela , Torres Guillermo , Caldwell Douglas A. , Collins Kevin I. , Schwarz Richard P.
Published: April 2023

We present a validation of a long-period (

91.68278

−
0.00041

+
0.00032

days) transiting sub-Neptune planet, TOI-1221 b (TIC 349095149.01), around a Sun-like (m

V
= 10.5) star. This is one of the few known exoplanets with a period >50 days, and belongs to the even smaller subset of which have bright enough hosts for detailed spectroscopic follow-up. We combine Transiting Exoplanet Survey Satellite light curves and ground-based time-series photometry from the Perth Exoplanet Survey Telescope (0.3 m) and Las Cumbres Observatory global telescope network (1.0 m) to analyze the transit signals and rule out nearby stars as potential false-positive sources. High-contrast imaging from the Southern Astrophysical Research Telescope and Gemini/Zorro rule out nearby stellar contaminants. Reconnaissance spectroscopy from CHIRON sets a planetary scale upper mass limit on the transiting object (1.1 and 3.5 M
Jup at 1σ and 3σ, respectively) and shows no sign of a spectroscopic binary companion. We determine a planetary radius of

R

p

=

2.91

−
0.12

+
0.13

R

⊕

, placing it in the sub-Neptune regime. With a stellar insolation of

S
=

6.06

−
0.77

+
0.85

S

⊕

, we calculate a moderate equilibrium temperature of T
eq = 440 K, assuming no albedo and perfect heat redistribution. We find a false-positive probability from the TRICERATOPS tool of FPP = 0.0014 ± 0.0003 as well as other qualitative and quantitative evidence to support the statistical validation of TOI-1221 b. We find significant evidence (>5σ) of oscillatory transit timing variations, likely indicative of an additional nontransiting planet.
Fast Reconstruction of 3D Density Distribution around the Sun Based on the MAS by Deep Learning
Authors: Rahman Sumiaya , Shin Seungheon , Jeong Hyun-Jin , Siddique Ashraf , Moon Yong-Jae , Park Eunsu , Kang Jihye , Bae Sung-Ho
Published: April 2023

This study is the first attempt to generate a three-dimensional (3D) coronal electron density distribution based on the pix2pixHD model, whose computing time is much shorter than that of the magnetohydrodynamic (MHD) simulation. For this, we consider photospheric solar magnetic fields as input, and electron density distribution simulated with the MHD Algorithm outside a Sphere (MAS) at a given solar radius is taken as output. We consider 155 pairs of Carrington rotations as inputs and outputs from 2010 June to 2022 April for training and testing. We train 152 deep-learning models for 152 solar radii, which are taken up to 30 solar radii. The artificial intelligence (AI) generated 3D electron densities from this study are quite consistent with the simulated ones from lower radii to higher radii, with an average correlation coefficient 0.97. The computing time of testing data sets up to 30 solar radii of 152 deep-learning models is about 45.2 s using the NVIDIA TITAN XP graphics-processing unit, which is much less than the typical simulation time of MAS. We find that the synthetic coronagraphic images estimated from the deep-learning models are similar to the Solar Heliospheric Observatory (SOHO)/Large Angle and Spectroscopic Coronagraph C3 coronagraph data, especially during the solar minimum period. The AI-generated coronal density distribution from this study can be used for space weather models on a near-real-time basis.
Conserving Local Magnetic Helicity in Numerical Simulations
Authors: Zenati Yossef , Vishniac Ethan T.
Published: April 2023

Magnetic helicity is robustly conserved in systems with very large magnetic Reynolds numbers, including most systems of astrophysical interest, and unlike kinetic and magnetic energy, it is not dissipated at small scales. This plays a major role in suppressing the kinematic large-scale dynamo and may also be responsible for driving the large-scale dynamo through the magnetic helicity flux. Numerical simulations of astrophysical systems typically lack sufficient resolution to enforce global magnetic helicity over several dynamical times. In these simulations, magnetic helicity is lost either through numerical errors or through the action of an unrealistically large resistivity. Errors in the internal distribution of magnetic helicity are equally important and typically larger. Here, we propose an algorithm for enforcing strict local conservation of magnetic helicity in the Coulomb gauge in numerical simulations, so that their evolution more closely approximates that of real systems.
Constraints on Magnetic Braking from the G8 Dwarf Stars 61 UMa and τ Cet
Authors: Metcalfe Travis S. , Strassmeier Klaus G. , Ilyin Ilya V. , van Saders Jennifer L. , Ayres Thomas R. , Finley Adam J. , Kochukhov Oleg , Petit Pascal , See Victor , Stassun Keivan G. , Jeffers Sandra V. , Marsden Stephen C. , Morin Julien , Vidotto Aline A.
Published: April 2023

During the first half of their main-sequence lifetimes, stars rapidly lose angular momentum to their magnetized winds, a process known as magnetic braking. Recent observations suggest a substantial decrease in the magnetic braking efficiency when stars reach a critical value of the Rossby number, the stellar rotation period normalized by the convective overturn timescale. Cooler stars have deeper convection zones with longer overturn times, reaching this critical Rossby number at slower rotation rates. The nature and timing of the transition to weakened magnetic braking have previously been constrained by several solar analogs and two slightly hotter stars. In this Letter, we derive the first direct constraints from stars cooler than the Sun. We present new spectropolarimetry of the old G8 dwarf τ Cet from the Large Binocular Telescope, and we reanalyze a published Zeeman Doppler image of the younger G8 star 61 UMa, yielding the large-scale magnetic field strengths and morphologies. We estimate mass-loss rates using archival X-ray observations and inferences from Lyα measurements, and we adopt other stellar properties from asteroseismology and spectral energy distribution fitting. The resulting calculations of the wind braking torque demonstrate that the rate of angular momentum loss drops by a factor of 300 between the ages of these two stars (1.4–9 Gyr), well above theoretical expectations. We summarize the available data to help constrain the value of the critical Rossby number, and we identify a new signature of the long-period detection edge in recent measurements from the Kepler mission.
A new species of Dictyochaeta (Sordariomycetes, Chaetosphaeriales, Chaetosphaeriaceae) from freshwater habitats in China
Authors: Yan Xin-Yi , Huang Jun-En , Song Hai-Yan , Gao Yang , Hu Hai-Jing , Zhai Zhi-Jun , Yan Jun-Qing , Huo Guang-Hua , Hu Dian-Ming
Published: April 2023

Freshwater fungi refer to the fungi that depend on the freshwater habitats for the whole life cycle or part of their life cycle. In this context, a new aquatic hyphomycete was isolated from decaying wood in a freshwater habitat in Jiangxi Province, China.

Dictyochaeta jiangxiensis sp. nov., a new aquatic hyphomycete, is characterised by its unbranched, septate, base-fertile conidiophores with multisepta and single phialide at the apex, brown, sterile seta, monophialidic, subcylindrical conidiogenous cells narrowing below the funnel-shaped collarette, hyaline, unicellular, thin-walled, smooth, guttulate, falcate to subclavate conidia narrowly rounded at both ends with hair-like appendages. Phylogenetically, the new species Dictyochaeta jiangxiensis clustered together with Dictyochaeta brevis MFLU 19-0216 in a well-supported clade, but formed a separate branch. In order to better define the taxonomic status of the new species, a phylogenetic tree of most closely-related taxa in Chaetosphaeriaceae was established, based on multi-locus sequences (ITS and LSU). The novel species is described and illustrated. Newly-generated molecular data of Dictyochaeta jiangxiensis is also provided.
Rapport au corps et normes de minceur au prisme du genre : quels enjeux ?
Authors: Lavrilloux Mathilde
Published: April 2023

Avec l’apparition du Programme national de nutrition santé en 2001, les individus se sont retrouvés confrontés à des prescriptions alimentaires communes, celles selon lesquelles l’alimentation devait être contrôlée dans le but d’acquérir un corps en bonne santé. En parallèle, les femmes, plus que les hommes, sont exposées à des pressions les poussant à acquérir un corps mince pour des raisons d’ordre esthétique. Cette enquête propose donc, à partir d’un questionnaire mené auprès de 450 femmes et 195 hommes de tous âges et de toutes catégories socio-économiques, d’interroger leur rapport au corps. Les résultats montrent notamment que les femmes, bien plus exposées que les hommes aux normes de minceur, sont également plus enclines qu’eux à souhaiter acquérir une silhouette plus fine que celle qu’elles jugent en bonne santé.
Des artisans du film qui deviennent techniciens de cinéma
Authors: Zarka Samuel
Published: April 2023

Cet article étudie la restructuration du marché du travail dans l’industrie cinématographique française au cours des années 1930 et dans le contexte du Front populaire. Issue d’une négociation collective entre producteurs de cinéma et metteurs en scène, la catégorie de techniciens de la production cinématographique s’est en effet institutionnalisée à l’encontre d’un syndicat ouvrier des studios et laboratoires photochimiques, porteur d’une vision unifiée de l’industrie. Cet épisode met en lumière les usages contrastés du droit du travail dans un moment fort d’institutionnalisation du salariat.
Au-delà du « carnet d’adresses »
Authors: Kolopp Sarah
Published: April 2023

Comment la compétition entre puissant·es est-elle régulée aux sommets de l’État quand les titres ne suffisent plus ? Cet article examine l’inégal accès des haut·es fonctionnaires aux positions de pouvoir à partir du cas de Jean-Yves Haberer. À la manière de la société de cour étudiée par Elias, c’est aussi dans et par le commerce des autres que s’ordonne la concurrence entre élites administratives. La sociologie des élites permet de déplacer le regard des politistes des relations politico-administratives vers l’économie multipolarisée d’échanges d’influence où se jouent, aussi, les carrières.
Variabilité interindividuelle de la réponse au stress – compléments
Authors: Trousselard Marion
Published: April 2023

La variabilité interindividuelle de la réponse de stress est importante. Cette réponse dépend de nombreux facteurs qui conditionnent en partie la santé physique et psychique des individus. Notamment, la répétition des contraintes favorise les pathologies de stress lorsque la réponse de stress est chroniquement mal-ajustée. Mieux appréhender les facteurs de cette variabilité est un enjeu de prévention. Le fonctionnement en pleine conscience est une cible d’intérêt pour la prévention en ce qu’il sous-tend la résilience. Si ce fonctionnement est entraîné par des programmes de méditation, les techniques ORFA permettent également de l’optimiser.
Activation cognitive et mise en action de l’individu en état de stress dépassé : l’apport des neurosciences
Authors: Giaume Louise
Published: April 2023

Exposés quotidiennement à des situations traumatiques, les primo-intervenants doivent affronter, au fil des interventions, décès brutaux, accidents de la voie publique, souffrance psychique et physique, violences urbaines et familiales, précarité, etc. Ces situations présentent toutes le risque d’être génératrices d’un stress important aussi bien pour ceux qui interviennent, que pour ceux qui en sont témoins. Comment faire face lorsqu’un individu présente un état de stress dépassé lors d’une intervention ?
Le sans-domicilisme. Réflexion sur les catégories de l’exclusion du logement
Authors: Loison Marie
Published: April 2023

L’absence de logement « à soi » n’est pas simple à définir et les sans-domicile forment une population hétérogène et fluctuante. La grande diversité de leurs trajectoires et de leurs situations résidentielles rend difficiles l’appréhension et la qualification du phénomène d’exclusion du logement. En France, depuis les travaux pionniers des années 1990 et jusqu’à aujourd’hui, différentes catégorisations ont été produites mais elles sont souvent méconnues et les mots employés génèrent des confusions ayant parfois des conséquences problématiques dans la mise en œuvre des politiques publiques à destination des populations concernées. Cette contribution propose d’ouvrir le débat en présentant le terme « sans-abrisme » comme une synecdoque du néologisme « sans-domicilisme ». Elle défend l’idée selon laquelle l’usage de ce dernier terme permet davantage d’éviter les confusions et la reproduction des idées reçues sur ces populations, de mieux prendre en compte les trajectoires spécifiques de certaines catégories de population exclues du logement et de mieux traduire le terme anglo-saxon homelessness (qui est aujourd’hui le plus souvent traduit par « sans-abrisme »). Ce faisant, il pourrait contribuer à la (re)constitution d’un champ de recherche français plus unifié sur cette question et à un meilleur dialogue entre recherche et action publique.
Le trafic de drogues en prison comme enjeu de santé publique
Authors: Protais Caroline , Jauffret-Roustide Marie
Published: April 2023

Cet article présente les principaux résultats d’une enquête réalisée par l’Observatoire français des drogues et des tendances addictives (OFDT) en partenariat avec le CERMES 3 et le CEMS 2 sur les échanges de drogues en prison. Après avoir décrit les différentes modalités d’échanges de substances et démontré l’existence de réseaux de trafics organisés en détention, trois différents risques sanitaires seront exposés. Certains concernent les détenus (surexposition aux produits, risques sociaux-sanitaires liés à l’instrumentalisation de certains prisonniers dans le trafic), d’autres, les surveillants (souffrance au travail). La conclusion présente les principales pistes pour prévenir ces risques, soulignant l’importance des réponses de long terme, orientées vers l’accompagnement et la réinsertion des détenus.
Serious video games in engineering education: A scoping review
Authors: Núñez-Pacheco Rosa , Espinoza-Montoya Claudia , Yucra-Quispe Liz-Marjorie , Turpo-Gebera Osbaldo , Aguaded Ignacio
Published: April 2023

Video games have become an important element of contemporary life. The need to use them in the field of education has given rise to the appearance of serious video games, which have been specially designed to achieve objectives at different educational levels and generate spaces for educational innovation. The purpose of this work is to investigate the use of serious video games in engineering education. A scoping review was carried out on serious video games that were used or designed for this purpose. The search was done in the Scopus and Web of Science databases between 2016 and 2021. The main results show that there is a strong inclination towards serious simulation video games, and they have a good degree of educational acceptance among engineering students.
1ST International Congress on Research, Technological Development and Innovation in University Education
Authors: Pérez Postigo Gerber Sergio , Amante García Beatriz , Martínez Martínez María
Published: April 2023

Different papers have been presented to the congress by renowned researchers along the following five thematic lines:- Scientific research, training and researcher training- Research, innovation and development policies in Higher Education.- Paradigms in scientific research and new epistemological challenges in the production of knowledge in Latin American universities.- Internationalization of research networks, groups and institutes.- Public communication of science and technology.
Hierarchical federated learning with global differential privacy
Authors: Long Youqun , Zhang Jianhui , Wang Gaoli , Fu Jie
Published: April 2023

Federated learning (FL) is a framework which is used in distributed machine learning to obtain an optimal model from clients' local updates. As an efficient design in model convergence and data communication, cloud-edge-client hierarchical federated learning (HFL) attracts more attention than the typical cloud-client architecture. However, the HFL still poses threats to clients' sensitive data by analyzing the upload and download parameters. In this paper, to address information leakage effectively, we propose a novel privacy-preserving scheme based on the concept of differential privacy (DP), adding Gaussian noises to the shared parameters when uploading them to edge and cloud servers and broadcasting them to clients. Our algorithm can obtain global differential privacy with adjustable noises in the architecture. We evaluate the performance on image classification tasks. In our experiment on the Modified National Institute of Standards and Technology (MNIST) dataset, we get 91% model accuracy-layer HFL-DP, our design is more secure while as being accurate.
Cauchy problem for fractional $ {(p, q)} $-difference equations
Authors: Boutiara Abdelatif , Rhaima Mohamed , Mchiri Lassaad , Makhlouf Abdellatif Ben
Published: April 2023

In this research article, we deal with the global convergence of successive approximations (s.a) as well as the existence of solutions to a fractional $ {(p, q)} $-difference equation. Then, we discuss the existence result of the solutions of Caputo-type $ {(p, q)} $-difference fractional vector-order equations in a Banach space. Also, we prove a theorem on the global convergence of successive approximations to the unique solution of our problem. Finally, the application of the main results is demonstrated by presenting numerical examples.
La Blockchain à l’épreuve de la vie privée
Authors: Caron Cécile
Published: April 2023

Presented as trust technologies, blockchains, by allowing secure peer-to-peer exchanges without the intermediary of a trusted third party, immediate and almost free of charge, have a strong disruptive potential. However, they are controversial, especially in terms of privacy. They raise issues of compliance with regulations and are accentuated by the emergence of a growing concern of users regarding the protection of their privacy. Through the analysis of a use case, the design and experimentation of a mobility service, we will show what challenges (governance, personal data management, transparency) this antagonism between Blockchains and privacy raises and what socio-technical compromises the actors have made to overcome them. If for the Blockchain specialists involved in the creation of this new service, these compromises have limited the disruptive potential of the technology by restricting its decentralized and anonymous character, they have allowed for the emergence of unexpected uses and benefits, such as confirming the choice of the Blockchain technology as a « privacy solution ». In addition, the search for solutions to ensure compliance has also involved socio-technical compromises that guarantee the acceptability of the service in the eyes of users, and have made it possible to take into account the broader issues of privacy (respect for intimacy, guarantee of autonomy and control of data) by going beyond the issues of compliance.
Light Induced Synthesis of Ag Nanorods for Potential Application as Optical Filter Tailored to Visible Domain
Authors: Sarkar Arnab Kumar , Rajbongshi Himanshu , Baruah Sunandan , Datta Pranayee
Published: April 2023

Monodispersed Ag nanorods were synthesized using a one-pot synthesis method. These Ag nanorods normally manifest dual surface plasmon resonance (SPR) peaks. This work presents a study of the variation of SPR peaks with variation in the shape of Ag nanorods. Shape variation was achieved through the degradation of a shape-controlling agent (PVP in this work) under white light irradiance with silica passivation to halt further shape variations. This paper also reports the growth & characterization of thin films of the synthesized rod-shaped silver nanoparticles on glass slides along with studies on band pass filter characteristics of the as-synthesized nanoparticles.
Optimization of Machining Variables of Inconel 800 Alloy in CNC Face Milling Using TiAlN and TiAlN-TiN Coated Inserts
Authors: Kumar Vinod , Bala Niraj
Published: April 2023

This research work is based on the machinability of an Inconel 800 alloy using TiAlN-coating and TiAlN-TiN-coating tools. In the CNC VMC Face milling process feed, depth of cut (DoC), and cutting speed consider input variables and surface roughness, Tool wear is measured for all machining conditions. To enhance the machining conditions a Taguchi L9 Design of Experiment was created. ANOVA analysis was used to identify the important variables influencing Flank wear (tool wear) and surface roughness. The signal-to-noise ratio for the ideal cutting combination was identified by evaluating the optimum surface roughness and tool wear. for the effect of coating, a comparison was done between the findings obtained using both TiAlN-coated and TiAlN-TiN tungsten carbide-coated tools. The best optimum surface roughness and tool wear of the experiment conducted under machining with TiAlN-TiN coated carbide tool resulted in .3433 µm and 128 µm respectively.
Structural and Dielectric Characterization of Nanocrystalline BaWO4
Authors: Stephen Seenamol K. , Xavier Francis P.A. , Varghese Thomas
Published: April 2023

BaWO4 samples prepared by the chemical precipitation method were structurally characterized by X-ray diffraction and scanning electron microscopic measurements. The results confirm the tetragonal scheelite-type structure of the BaWO4 sample. The dependence of εꞌ, tanδ, and ac conductivity with frequency and temperature was studied for the nanocrystalline BaWO4 calcined samples. It is found that all these factors hinge on temperature and frequency. The values of εꞌ and tanδ are high at low frequencies and their values decrease quickly with the increase in frequency. Both εꞌ and tanδ attain steady values at high frequency regime. The space charge polarization is the cause of exponential decrease of εꞌ at the low frequency. It is also found that the calcination temperature is a key factor in determining the dielectric properties of a material. The low and steady value of the dissipation factor and an almost steady value of the εꞌ suggest the suitability of BaWO4 materials in low-temperature co-fired ceramic applications. The deviation of ac conductivity against frequency comply with Jonscher’s power law, however, a small deviation in the low-frequency region is due to the Maxwell-Wagner-type effect.
Critical Failure Factors in ERP Implementation: A Systematic Literature Review
Authors: Rajapakse D. P. P. K. , Thushara S. C.
Published: April 2023

It has been more than two decades of experience adopting and implementing enterprise resource planning (ERP) systems in business. However, the success of these systems remains debatable. The failure rate of ERP systems is relatively high, despite the fact that success stories of ERPs are recorded in earlier research studies. The main purpose of this study is to identify and assess the degree of ERP implementation failure factors encountered by organisations and confirm which is significant in various countries. A systematic literature review was performed, considering research studies published between 2000 to 2022 for this purpose. This study critically reviewed 55 relevant articles published in reputable journals. The systematic literature review identified 35 failure factors categorised as the most critical based on their occurrence in past studies. The top five failure factors included lack of top management support, Inadequate education and training, the mismatch between the system and business strategies, lack of project management performers, and users unwilling to use the ERP system. According to the country-wise evaluation, "Lack of top management support" is a critical failure factor of the ERP implementation for all clusters. However, the more frequent impact for Asian countries, with a moderate impact for European countries and less for North American countries. Also, "Inadequate education and training" is a major Critical failure factor for Asian and North American countries during ERP implementation projects.This is the first comprehensive systematic review attempted to identify the Critical failure factor during the implementation of ERP systems.
Stroke in Mycoplasma pneumoniae pneumonia: a clinical case
Authors: Russo Fara , Russo Maria Carolina , Candurro Camillo
Published: April 2023

Mycoplasma pneumoniae (MP) cause more than 40% of community- acquired pneumonia. Sometimes extrapulmonary manifestations may occur: in particular, central nervous system (CNS) symptoms occur in 10% of hospitalizations for MP. A young woman was being admitted to our intensive care unit (ICU) for respiratory failure and suspected stroke, ten days after flu-like syndrome. The patient was already intubated, sedated, in controlled mechanical ventilation. At admission brain computed tomography (CT) was negative, chest CT showed bilateral pneumonia with interstitial thickening. After 36 hours, brain CT showed an extensive hypodense cortico-subcortical area with frontal-parietal-temporal left seat. The positivity of IgM for MP and PCR in nasopharynx led to the diagnosis of MP pneumonia complicated by stroke: 15 days after admission, a post-ischemic status was manifested by aphasia, dysphagia, right brachio-crural hemiplegia. In our paper we evaluated possible major neurological complications, up to stroke, in MP respiratory infection. We concluded that, although they are actually rare, neurological symptoms up to cerebral ischemia in young people with MP pneumonia, are to be considered.