bluuebunny/crossref_metadata_2025 huggingface dataset:
Edge Effect in Pine Stands in the Northern Taiga
Authors:   N. Laverov Federal Center for Integrated Arctic Research of the Ural Branch of the Russian Academy of Sciences, Feklistov Pavel A. , Bolotov Ivan N. , Sobolev Aleksandr N. ,   Solovetsky State Historical, Architectural and Natural Museum-Reserve, Babich Nikolay A. ,   Northern (Arctic) Federal University named after M.V. Lomonosov, Sungurova Natalia R. , Melekhov Vladimir I.
Published: April 2023

The studies are carried out in pine stands situated on the forest boundaries, which are in between the open space locations and forest growth areas. The investigations were made on the territory of the Kholmogorskiy and Primorskiy districts in the Arkhangelsk region. The purpose of the research is to identify the characteristics of meteorological factors at different distances from the edge of phytocenosis as well as their influence on the undergrowth and ground vegetation in the ecotone zone. For this purpose, the vegetation, which grew on the transects at different distances from the edge of the phytocenosis, is described in layers. The transects were positioned perpendicular to the forest boundary. The following parameters were described and measured, such as undergrowth, ground vegetation, luminance, air temperature, wind speed, air humidity. The taxation of the stand was accomplished by using relascopic circular platforms. It is found that luminance, air temperature, and wind speed naturally decrease with distance from the edge of the phytocenosis deeper into the forest. The decrease in luminance can be revealed to 8 m, temperature to 8–15 m, wind speed to 30 m. However, air humidity increases up to 8 m. A correlation between meteorological factors and the distance from the edge of the phytocenosis is determined. The distribution of the undergrowth according to the edges of phytocenosis has a consistent pattern. The undergrowth of heliophytes of pine, birch, and aspen is most abundant at the edge of phytocenoses, and their numbers decrease with distance from the edge. The undergrowth of sciophytes either increases or its quantity does not change. Such distributions are confirmed by correlation analysis. The resulting figures are rated as significant or high. They are reliable at the significance level of 0.05. The number of plants in the grass-shrub tier decreases with the distance deep into the forest. Any define conclusion can’t be made regarding the moss-lichen tier. In general, it can be concluded that the size of the ecotone zone in terms of meteorological factors and indicators of vegetation is 12–14 m. For citation: Feklistov P.A., Sobolev A.N., Babich N.A., Sungurova N.R., Melekhov V.I., Bolotov I.N. Edge Effect in Pine Stands in the Northern Taiga. Lesnoy Zhurnal = Russian Forestry Journal, 2023, no. 2, pp. 26–37. (In Russ.). https://doi.org/10.37482/0536-1036-2023-2-26-37
Dynamische Berechnung von Eisenbahnbrücken – Parameteruntersuchung für zweigleisige Brücken aus Spannbeton/Dynamic Calculation of Railroad Bridges – Parameter Investigation of Double Track Prestressed Concrete Bridges
Authors: Fröhlich Stephan , Laubach Andreas
Published: April 2023

Ziel dieser Parameteruntersuchung ist es, die Auswirkungen einer erforderlichen dynamischen Berechnung schon im Entwurf abschätzen zu können. Dazu werden bestimmte Entwurfsparameter des festgelegten Brückentyps – zweigleisige und über zwei Felder spannende Brücken aus Spannbeton – variiert, die verschiedenen Varianten des Tragwerks dynamisch berechnet und die Ergebnisse mit den statischen Schnittgrößen verglichen. Die Brückensysteme mit zweistegigen Plattenbalken als Überbauquerschnitt unterscheiden sich in der Stützweite, dem Stützweitenverhältnis und in ihrer Schlankheit. Die statischen Berechnungen erfolgen mit dem Regellastmodell LM 71 für Vertikallasten aus Zugverkehr. Den mittels direkter Zeitschrittintegration durchgeführten dynamischen Berechnungen werden die in Deutschland am häufigsten verkehrenden Hochgeschwindigkeitszüge ICE 3 und ICE 4 der Deutschen Bahn zugrunde gelegt. Durch die graphische Darstellung des Schnittgrößenvergleichs können, ohne eigene dynamische Berechnungen anzustellen, deren Auswirkung auf die bemessungsrelevanten Schnittgrößen im Entwurf abgeschätzt werden.
Mixed-Reality in der Ingenieurgeologie – von der Datenaufnahme bis zum immersiven 3D-Hologramm/Mixed-Reality in engineering geology – from data acquisition to immersive 3D holograms
Authors: Kaspar Markus , Kieffer D. Scott
Published: April 2023

Die rasch voranschreitende Digitalisierung und wachsenden Mengen an (Geo)-daten stellen die Bauindustrie vor neue Herausforderungen. Moderne Geräte wie Drohnen und Laserscanner produzieren in kurzer Zeit enorme Datenmengen. Diese aufzubereiten und Auftraggebern, Planern oder Interessenvertretern verständlich zu präsentieren sind Teil von ingenieurgeologischen Aufgaben. Anstelle der üblicherweise verwendeten Pläne, Profilschnitte und statischen 3D-Modelle können diese Daten auf anschaulichere Weise in einer interaktiven, digitalen Umgebung präsentiert werden. Mixed-Reality Anwendungen bieten hierbei neue Möglichkeiten, den digitalen Zwilling eines Projektes in Form eines Hologramms virtuell und immersiv zu besuchen. Ortsunabhängige Besprechungen in Echtzeit an holografischen 3D-Modellen, ohne physisch den Ort zu wechseln, bringen Zeitersparnis und raschen Informationsaustausch mit sich.

 

Dieser Aufsatz liefert einen Überblick über den Workflow zum Generieren von holografischen Daten bestehender Projekte und legt dar, was bei der Aufnahme und Verarbeitung von Daten für neue Projekte zu beachten ist. Der Schwerpunkt liegt auf ingenieurgeologischen Anwendungen, wobei die Möglichkeiten und Grenzen dieser Technologie erörtert werden.
‘Everyone is a Master in his own Way’: Master, Skill, Craft in Paroemias
Authors:   Moscow City University, Raikova Irina N.
Published: April 2023

The paper examines a thematic group of proverbs and sayings about the master, skill, craft, material, tools, and products of the master in Russian and non-ethnic material. It also involves, for comparison, the material of riddles of a similar subject. The study reveals the main traditional ideas about the master and mastery, similar in various ethno-cultural traditions and relevant to this day: mastery should bring income; any craft is necessary; each person is a master in his own realm; craft requires specialization; mastery is determined by trained students; a real master does not give advice to another, etc. The variants and ethnic versions of the paroemias often highlight specific, often contradictory nuances of these ideas. In the paroemias, we are talking primarily about artisans and people engaged in household works. Mastery is associated primarily with manual labor, less often in the Russian tradition, it relates to creative people. The paroemias confirm the blacksmith's special status in mythology, history and culture. In addition to didactic, informative, prescriptive functions, the analyzed paroemias also perform emotive one. Riddles of similar subjects associate the human with the natural, thereby affirming the natural source of human skill and the skill of Mother Nature herself.
Perception of the Theological Seminary by the Soviet Intelligentsia of the Late USSR Period
Authors:   Institute of Pedagogical Education and Social Technologies, Lebedev Vladimir Yu. , Prilutskii Alexander M. ,   Herzen State Pedagogical University of Russia
Published: April 2023

The paper is to study the mythological late Soviet discourse about Orthodox seminaries and academies. The formation of this discourse took place in the conditions of alienation of a significant part of the Soviet intelligentsia from religion, which applies both to the humanitarian and technical intelligentsia. The sources of the formation of the corresponding mythologemes are atheistic propaganda materials, often representing religious relations in a caricatured, vulgarized form, stories of the older generation, often quite ignorant in religious matters, random information obtained from various sources, etc. Along with the Soviet intelligentsia, representatives of the clergy and lower clergy were also exposed to “church mythology”. First of all, this applies to the clergy who began their ministry in the years of perestroika. Many of them came to the church from a secular, sometimes atheistic background, so that they did not have family church traditions and were in many ways bearers of the late Soviet culture of everyday life. The discourse fixes the mythological idealization of spiritual education, with the emphasis on the deep study of classical languages and modern languages, continuity with pre-revolutionary schools, an exceptionally large competition of applicants. Along with the idealization of spiritual education, discourse records another extreme, which is largely a consequence of Soviet atheistic propaganda, portraying the church as a stronghold of ignorance and obscurantism. Negative reviews also demonstrate a significant range both in the harshness of criticism and in its accordance with reality (from fixing real moments in the life of church schools to mythological fantasies). The paper shows that negative reviews differ in the degree of temporal relevance and the desire to globalize the comments. Such reviews demonstrate varying degrees of familiarity with the real state of affairs.
AVALIAÇÃO DO USO DO PÓ DE BASALTO NA CULTURA DO FEIJÃO PRETO
Authors: Griebler Ferreira Namir , Redin Marciel , Maisa da Silva Danni , Enivar Lanzanova Mastrângello , Lorensi de Souza Eduardo , Guerra Divanilde , Hart Weber Fernanda
Published: April 2023

Objetivo: Avaliar o efeito de diferentes doses de pó de basalto (PB) sobre a cultura do feijão preto (Phaseolus vulgaris) como alternativa de fertilização do solo. Métodos: O trabalho foi desenvolvido utilizando-se 396 vasos de plástico como unidades experimentais, nas quais foram testadas 5 doses de PB: 10, 20, 40, 80 e 160 t ha, e um tratamento com NPK, nas condições de aplicação superficial (SUP) e incorporado (INC) tendo como substrato solo e areia lavada, com repetições para cada tratamento. Foram avaliados a altura de plantas, número de folhas e vagens, produção de matéria seca da parte aérea e de raízes. Resultados: Os tratamentos com PB INC ao solo apresentaram os melhores resultados para todas as quantidades aplicadas, com desempenho satisfatório para todos os quesitos avaliados. As doses de 20 t ha e 40 t ha foram podem ser consideradas as mais viáveis considerando os resultados apresentados pela cultura do feijão preto. Conclusão: Portanto, experimento indica que o uso de PB INC pode ser utilizado como fonte de fertilização mineral alternativa na cultura do feijão preto.
SÍNDROME DE EAGLE: ASPECTOS MORFOLÓGICOS E CLÍNICO-CIRÚRGICOS
Authors: Ribeiro Ryan Lisboa , Porto Ítalo de Souza , Silva Antônio Levi Alves , Araújo Moysés Macedo , Silva Wesley Pereira da , Braga Emilie Ferreira , Souza Gabriela Caldeira de Paula , Sousa Maria Clara Silva Ribeiro , Silva Mariana Morais da , Cerqueira Gilberto Santos
Published: April 2023

O processo estiloide é uma protuberância que emerge da parte inferior da base do crânio. Ele se relaciona anatomicamente com diversos nervos, vasos, músculos e ligamentos, além de possuir importantes conexões embriológicas. Quando essa projeção tem um comprimento elevado ou quando há uma calcificação do ligamento estilo-hioideo, pode ocorrer a síndrome de Eagle, uma condição rara cuja sintomatologia inclui, dentre outras queixas, dores na região cervico-facial. O estudo de uma caixa craniana que possuía um tamanho aberrante do processo estiloide associado ao relato de uma colaboradora detentora da síndrome foi de grande valia para uma melhor compreensão dessa patologia e de suas implicações clínico-cirúrgicas, temas esses abordados neste capítulo.
DIVERSIDADE DE PLANTAS MEDICINAIS EM QUINTAIS E ROÇADOS DA COMUNIDADE DE FUNDO DE PASTO CANOA, EM JUAZEIRO, BAHIA
Authors: Costa Erilva Machado , Pifano Daniel Salgado , Yamamoto Sandra Mari
Published: April 2023

Objetivo: o objetivo deste estudo foi realizar um levantamento das plantas utilizadas para fins medicinais que são cultivadas nos quintais e roçados da Comunidade de Fundo de Pasto Canoa, Distrito de Massaroca, em Juazeiro, Bahia. Métodos: Este estudo foi realizado na comunidade de Fundo de Pasto Canoa, que está localizada no Distrito de Massaroca, no município de Juazeiro, Bahia, no Território de Indentidade Sertão do São Francisco. O método de amostragem utilizado foi não-probabilístico por meio da técnica snowball sampling (bola de neve), com intuito de identificar os participantes informantes-chave conhecedores sobre as plantas medicinais da comunidade. A abordagem dos informantes-chave foi realizada por meio de entrevistas semiestruturadas com auxílio de um formulário contendo perguntas abertas e fechadas.As informações sobre as plantas medicinais citadas, registradas nas listas livres, foram fundamentadas e confirmadas por meio de turnês-guiadas pelos quintais e roçados das propriedades dos informantes. Resultados: através da listagem livre das plantas medicinais foi possível identificar 25 espécies, distribuídas em 17 famílias botânicas e 23 gêneros. As família botânicas com maior número de espécies citadas foram Fabaceae e Lamiaceae com quatro espécies cada, seguidas por Verbenaceae e Asteraceae com duas espécies cada. No que se refere à origem das espécies citadas, 64% são exóticas (cultivadas e naturalizadas) e 36% nativas. Conclusão: os saberes e fazeres terapêuticos das plantas medicinais aqui registradas estão resguardados com informantes-chave em sua maioria mulheres que têm um importante protagonismo no cultivo e manutenção dos quintais na comunidade Canoa. As herbáceaes capim-santo (Cymbopogon citratus) e a erva cidreira (Lippia alba), foram as espécies mais citadas nas listas livres, sendo ambas utilizadas na forma de chá para ação calmante. As folhosas de origem exótica e hábito de crescimento herbáceo são predominantes nos quintais e roçados da comunidade estudada.
ARTÉRIA DE PERCHERON: ESTUDO DA VARIAÇÃO ANATÔMICA E SUAS IMPLICAÇÕES CLÍNICAS
Authors: Sperandio ACF , Gazzinelli VS , Monteiro GS , Abreu BJ , Amaral EA
Published: April 2023

A artéria de Percheron (AP) é uma rara variação anatômica da circulação encefálica que consiste em um tronco solitário com origem no segmento proximal (P1) da artéria cerebral posterior (ACP). Tem como função suprir o tálamo paramediano e o mesencéfalo rostral através de ramos perfurantes. A oclusão ou lesão da AP provoca o infarto talâmico paramediano bilateral com ou sem acometimento do mesencéfalo rostral. Devido ao conjunto de funções do tálamo, a sintomatologia do infarto é incomum e depende das áreas talâmicas afetadas. Além disso, por ter um pequeno calibre, a detecção do infarto da AP por intermédio de exames de imagem iniciais muitas vezes não é possível. A junção dos sinais e sintomas obscuros com a difícil visualização por imagem torna o diagnóstico do infarto talâmico paramediano bilateral uma tarefa desafiadora. O infarto provocado pela oclusão da AP é frequentemente manifestado por três sintomas clássicos: alterações da consciência, déficits de memória e paralisia do olhar vertical. No entanto, outros sintomas sensórios, motores e psíquicos podem ocorrer. O estudo sobre as variações na vascularização do tálamo paramediano evidencia a potencialidade de um ensino contextualizado, integrando ciências morfofuncionais e conhecimento médico aplicado
A UTILIZAÇÃO DO QUADRO DE MODELO DE NEGÓCIO
PARA AUXÍLIO NO PLANEJAMENTO E PRODUÇÃO
DE UM NOVO PRODUTO, A COMPOTA DE PITAYA
COM ESPUMANTE E VINHO BRANCO
Authors: Sampaio Neto A. , Pacheco Clecia Simone Gonçalves Rosa , Araújo José Lincoln Pinheiro , Padilha Neto Antonio de Santana , Brandão Luma Mirely de Souza , Santos Florisvaldo Cavalcanti dos , Silva Ana Carla Pereira da , Brito Maria Victoria Souza Gonçalves , Alves Danielle de Sousa , Santos Reinaldo Pacheco dos
Published: April 2023

O Quadro de Modelo de Negócios ou Business Model Canvas, como também é conhecido, é uma ferramenta que permite planejar, criar ou reformular algum empreendimento. Desenvolvido pelo suíço Alex Osterwalder, sendo um instrumento que visa compreender de maneira fácil e lógica, a estrutura de um negócio, a partir da descrição de elementos e fases que compõem um empreendimento, como: Proposta de Valor, Canais, Segmento de Clientes, Relacionamento com Clientes, Recursos Principais, Atividades Principais, Parcerias Principais, Estrutura de Custos e Fontes de Receita. Objetivo: Analisar e fazer compreender o quadro de modelo de negócio elaborado pelo empreendimento Compota do Vale, que no ano de 2022, criou a Compota de Pitaya com Espumante e Vinho Branco. Método: É um estudo de caráter exploratório e descritivo, com abordagem qualitativa. Resultados: Depois de analisar o quadro de modelo de negócio desenvolvido, constatou-se que a Compota do Vale tem potencial e viabilidade, disponibilizando um produto exclusivo, inovador, com boa qualidade e sabor, além da valorização local da matéria-prima usada. Para a obtenção desse produto, a empresa apresenta uma variedade de canais de comunicação, como Instagram, Site, WhatsApp e Delivery, além de disponibilizar o produto em lojas físicas. Ademais, a empresa conta com parcerias importantes, como a Agência Municipal do Empreendedor de Petrolina - PE (AGE Petrolina) , Empreendedoras do Vale, Sertão das Artes e SEBRAE Pernambuco. Conclusão: Devido à diversidade de frutas existentes no Semiárido nordestino e ao fato de que estas apresentam propriedades adequadas para o processamento, além de funcionais, demonstra-se que, este é um mercado que possui um potencial de crescimento no Brasil.
VÉRTEBRAS CERVICAIS ATÍPICAS ASSOCIADAS À SÍNDROME DE KLIPPEL FEIL
Authors: Gasparim Valentina , Camargo Ana , Silva Anna , Ruchs Eduarda , Roque Matheus , Freitas Jayme , Isaac Andréia , Pereira Kleber
Published: April 2023

Alterações congênitas da coluna vertebral ocorrem, muitas vezes, por falhas de formação de uma ou mais vértebras ou erros no processo de segmentação, podendo resultar na posterior fusão de um número indeterminado de vértebras. Tais anomalias surgem quando o esqueleto axial se forma no mesênquima, durante a quinta ou a sexta semana de gestação. O objetivo do artigo é relatar uma fusão na segunda e na terceira vértebras cervicais, encontradas em crânios secos de um projeto de extensão realizado na Universidade Federal do Paraná, Campus Toledo. Para esse projeto, foram analisadas 18 ossadas de cadáveres provenientes do cemitério municipal de Cascavel-PR, advindas de doações feitas conforme a Lei n 8.501, de 30 de novembro de 1992, que visa disciplinar a destinação de cadáver às escolas de medicina para fins de ensino e pesquisa. O método utilizou-se da osteotécnica para a preparação das peças ósseas cadavéricas. Em uma das ossadas, foi encontrada uma sinostose do áxis (C II) com a terceira vértebra cervical, apresentando a união completa dos corpos vertebrais e processos espinhosos e parcial dos arcos vertebrais. Essa anomalia pode interferir diretamente na qualidade de vida do indivíduo portador, podendo estar associada a uma condição congênita rara, denominada síndrome de Klippel Feil (SKF), que atinge 1 a cada 42000 pessoas, com predominância em pacientes do sexo feminino (65% dos casos). A SKF possui como associações clínicas comuns a tríade: pescoço curto e alado, baixa implantação dos cabelos e restrição dos movimentos cervicais. Outras manifestações menos frequentes são surdez, anormalidades geniturinárias, alterações cardiovasculares, escoliose e outras anormalidades ósseas, incluindo malformações nas costelas (também presentes na ossada analisada). Por fim, o estudo clínico e o diagnóstico precoce de malformações congênitas na coluna vertebral e da síndrome de Klippel Feil são de extrema importância para investigar doenças associadas e outras condições extra-osteoarticulares, que não possuem caráter curativo, a fim de obter um bom prognóstico.
VARIAÇÃO ANATÔMICA DO NERVO RADIAL E SÍNDROMES COMPRESSIVAS: REVISÃO DE CASOS E APLICAÇÃO CLÍNICA
Authors: Bettencourt Pires Maria Alexandre , Silva Júnior Edivaldo Xavier da , Martinez Daniel Casanova , Olewnik Łukasz Hubert , Pais Diogo De Freitas Branco
Published: April 2023

O presente estudo do nervo radial por revisão e classificação das principais variações anatómicas, em relação com os pontos de compressão ou lesão, fundamenta-se em dissecções humanas efetuadas em Teatro Anatómico de Lisboa, Pernambuco, Santiago do Chile e Varsóvia. É apresentada revisão histórica e bibliográfica dos principais achados anatómicos referentes, desde o século XVI, completando com atualização clinico-cirúrgica acerca das principais aplicações clínicas, como o manejo de síndromes compressivas. As lesões por estiramento do nervo radial resultam, em geral, de fraturas diafisárias umerais, ou na sequência das manipulações ortopédicas de reparação. As lesões compressivas do nervo surgem nos pontos de relação com outras estruturas envolventes, musculares, tendinosas ou fasciais, e variam na sintomatologia, consoante sejam lesadas fibras sensitivas e/ou motoras. A compressão do ramo interósseo posterior (ramo motor), a nível da arcada do músculo supinador produz sintomas motores com afeção do grupo muscular póstero-lateral do antebraço, como “mão pendente” (Síndrome do supinador); A compressão do ramo anterior, sensitivo, ao nível do “túnel radial”, no trajeto profundo do nervo, ou no ponto em que o nervo emerge superficialmente, por perfuração da fáscia para se tornar subcutâneo, cursando com queixas sensitivas sem afeção motora (síndrome de Wartenberg). A anatomia clínica do nervo radial é menos explorada, modernamente, por comparação com a clínica de síndromes compressivas do nervo mediano, o que acresce ao interesse pelo estudo anatómico do nervo, pela maior dificuldade de preparação.
The Effectiveness of The Free Senior High School Policy in Ghana: A Moral Development Perspective
Authors: Tawiah Dennis , Addai-Mensah Peter
Published: April 2023

The secondary agents of social connections are schools. Since schools have access to trained professionals and resources, it is assumed that this is the only place where students’ moral and ethical development can be reinforced and flourish. As a result, the school’s role is to support students in developing their moral judgment. However, present students’ behaviour in the post-free senior high school period is getting out of hand, both on school campuses and in society. This has raised a lot of questions about the effectiveness of the free senior high school policy on students’ moral development. This necessitated research into how the policy has affected students’ conduct and moral development. The researchers employed a descriptive survey design for this study. Interviews and focus group discussions were used to collect data from forty-one (41) participants, consisting of twenty-one (21) students, ten (10) teachers, and ten (10) parents in Sefwi Wiawso Municipality in the Western North Region of Ghana. It was established that the policy has led to mass moral literacy (moral education). On the other hand, other challenges have impaired students’ moral development. The findings call for and necessitate that those with a vested interest in the free senior high school policy do an evaluation and revision of the program.

Keywords: Ghana, Free Senior High School Policy, Morality, and Moral Development, Double Track System
On Generalized WKB Expansion of Monodromy Generating Function
Authors:   Concordia University,Canada, Klimov Roman
Published: April 2023

We study symplectic properties of the monodromy map of the Schrödinger equation on a Riemann surface with a meromorphic potential having second-order poles. At first, we discuss the conditions for the base projective connection, which induces its own set of Darboux homological coordinates, to imply the Goldman Poisson structure on the character variety. Using this result, we extend the paper [Theoret. and Math. Phys. 206 (2021), 258-295, arXiv:1910.07140], by performing generalized WKB expansion of the generating function of monodromy symplectomorphism (the Yang-Yang function) and computing its first three terms.
FUZZY TOPSIS IN SELECTING LOGISTIC HANDLING OPERATOR: CASE STUDY FROM POLAND
Authors: Tubis Agnieszka , Werbińska-Wojciechowska Sylwia
Published: April 2023

Reliable and effective selection of logistic handling operator is a particularly demanding process due to the short reaction time or high level of accompanying stress. Moreover, diversification of transported cargo makes use of classical indicators and methods of carrier selection highly unsatisfactory for decision-makers. To solve this problem, managers are seeking multi-criteria decision methods that improve the decision-making process related to the selection of the carrier and reduce the risk indicator related to the incorrect implementation of the transport order. Thus, in this paper, we present a Multi-Criteria Decision-Making (MCDM) approach for selecting logistic handling operators under partial or incomplete information (uncertainty) and taking into account the different type of transported cargo. The proposed approach comprises 2 main steps. In the 1st step, we identify the input parameters, mainly connected with criteria for carrier selection depending on the type of transported cargo. In the 2nd step, experts provide linguistic ratings to the potential alternatives against the selected criteria and the best alternative is chosen. At this stage, the fuzzy Technique for Order Performance by Similarity to Ideal Solution (TOPSIS) approach is used. Later, the applicability of the developed method is presented based on the chosen case company. The comparison of classical and fuzzy approaches to decision-making process is also given.
The impact of COVID-19 on the accommodation sector in tourism - a bibliometric analysis
Authors: Nekova Mariela
Published: April 2023

The significance of review articles has been proved. This type of articles is especially necessary now, when immediate actions to save an important economic sector must be taken. The present research aims to determine the impacts of the COVID-19 pandemic on one of the most important elements of tourism – the accommodation facilities, through bibliometric analysis. In order to achieve this goal, the VOSviewer software was used, and data from one of the world’s largest databases of scientific production – the Web of Science, was collected. The bibliographic coupling approach was used in the bibliometric analysis. The bibliometric analysis was followed by content analysis of the most cited studies from each cluster. The effects of COVID-19 on the accommodation facilities are summarized and classified by groups.
An initial molecular resolution of the mantellid frogs of the Guibemantis liber complex reveals three new species from northern Madagascar
Authors: Koppetsch Thore , Pabijan Maciej , Hutter Carl R. , Köhler Jörn , Gehring Philip-Sebastian , Rakotoarison Andolalao , Ratsoavina Fanomezana M. , Scherz Mark D. , Vieites David R. , Glaw Frank , Vences Miguel
Published: April 2023

The small arboreal frog Guibemantis liber (Anura: Mantellidae) has served as an example for the existence of deep conspecific lineages that differ by a substantial amount in mitochondrial DNA but are similar in morphology and bioacoustics and thus are assigned to the same nominal species. During fieldwork in northern Madagascar, we identified additional such lineages and surprisingly, observed close syntopy of two of these at various sites. In-depth study based on DNA sequences of the mitochondrial cytochrome b gene from 338 specimens of G. liber sensu lato from across its range, sequences of four nuclear-encoded markers for 154‒257 of these specimens, a phylogenomic dataset obtained by the FrogCap target capture approach, and additional mitochondrial genes for representatives of most mitochondrial lineages, as well as bioacoustic and morphological comparisons, revealed concordant differentiation among several lineages of the G. liber complex. We identify nine lineages differing by 5.3‒15.5% in cytochrome b and 2.4‒10.1% in the 16S rRNA gene, and find that several of these lack or have only limited allele sharing in the nuclear-encoded genes. Based on sympatric or parapatric occurrence without genetic admixture, combined with differences in bioacoustic and morphological characters, we scientifically name three lineages from northern Madagascar as new species: G. razokysp. nov., G. razandrysp. nov., and G. fotsitendasp. nov. Of these new species, G. razokysp. nov. and G. razandrysp. nov. show widespread syntopy across northern Madagascar and differ in body size and advertisement calls. Guibemantis fotsitendasp. nov. is sister to G. razandrysp. nov., but appears to occur at lower elevations, including in close geographic proximity on the Marojejy Massif. We also detected subtle differences in advertisement calls among various other mitochondrial lineages distributed in the Northern Central East and Southern Central East of Madagascar, but the status and nomenclatural identity of these lineages require further morphological and bioacoustic study of reliably genotyped individuals, and assignment of the three available names in the complex: Rhacophorus liber Peracca, 1893, Gephyromantis albogularis Guibé, 1947, and Gephyromantis variabilis Millot and Guibé, 1951. We discuss the identity and type material of these three nomina, designate a lectotype for Gephyromantis variabilis from Itremo, and flag the collection of new material from their type localities, Andrangoloaka and Itremo, as paramount for a comprehensive revision of the G. liber complex.
Fatigue damage calculation of cold recycled asphalt pavement considering measured temperature field and traffic volume distribution
Authors: Dong Zhao , Sai Zhiyi , Zhang Jinglin , Xu Guangji
Published: April 2023

A finite element simulation method for fatigue damage calculation and life prediction of pavement structures under the influence of temperature and traffic distribution factors was proposed in this study. Relying on the test cold recycled asphalt pavement structure, the existing distress, pavement structure forms, field monitored temperature and strain were first introduced and analyzed. Then, in constructing the numerical model, the viscoelastic constitutive model was introduced to characterize the effect of temperature and loading conditions on the mechanical response of the hot mix asphalt (HMA) layers and the emulsified asphalt cold recycled (EACR) layer. The damage variables are defined by fatigue equations, and the damage accumulation can be determined by Miner's linear fatigue accumulation theory. To reflect the distribution of traffic volume, the total traffic volume of a year was divided into 144 axle load groups according to the monthly and hourly distribution conditions. Accordingly, based on the monthly maximum and minimum temperature, 12 representative days were selected to represent the climate characteristics of 12 months, respectively. Then, each representative day's measured structural temperature data were extracted every 2 hours and linearly interpolated to obtain 144 representative temperature fields corresponding to 144 axle load groups. Through the above method, simulation calculations were performed for cold recycled asphalt pavement structures with different cement-stabilized aggregate (CSA) base stiffnesses. The results show that the fatigue damage accumulation of the EACR layers reaches its highest value in winter and midday hours, owing to the temperature variation and traffic distribution. Due to the weak fatigue resistance of EACR mixtures, it is not recommended to be paved EACR layers directly on top of the CSA base with poor bearing capacity. Otherwise, fatigue cracking is likely to occur first. For this reason, recommendations for ensuring the durability of the cold recycled pavement structure were also proposed in the study.
Frames associated with an operator in spaces with an indefinite metric
Authors: Villar Osmin Ferrer , Acosta Jesús Domínguez , Ortiz Edilberto Arroyo
Published: April 2023

In the present paper, we study frames associated with an operator ($ \mathcal{W} $-frames) in Krein spaces, and we give the definition of frames associated with an operator depending on the adjoint of the operator in the Krein space (Definition 4.1). We prove that the definition given in [A. Mohammed, K. Samir, N. Bounader, K-frames for Krein spaces, Ann. Funct. Anal., 14 (2023), 10.], which depends on the adjoint of the operator in the associated Hilbert space, is a consequence of our definition. We prove that our definition is independent of the fundamental decomposition (Theorem 4.1) and that having $ \mathcal{W} $-frames for the Krein space necessarily gives $ \mathcal{W} $-frames for the Hilbert spaces that compose the Krein space (Theorem 4.4). We also prove that orthogonal projectors generate new operators with their respective frames (Theorem 4.2). We prove an equivalence theorem for $ \mathcal{W} $-frames (Theorem 4.3), without depending on the fundamental symmetry as usually given in Hilbert spaces.
« Maximal Extractable Value » ou la Tragédie des Blockchains en tant que Communs
Authors: Filippi Primavera de , Deffains Bruno , Poux Philémon
Published: April 2023

Dans cet article, nous montrons comment certaines pratiques de Maximal Extractable Value (MEV) qui conduisent à l’accaparement, par certains acteurs des réseaux blockchains, de la valeur produite par d’autres utilisateurs s’apparentent à du parasitisme (freeriding). Nous montrons que ces comportements de passagers clandestins d’un nouveau genre sont rendus possible par la conception algorithmique et économique des blockchains qui éliminent pourtant les pratiques classiques de « free-riders ». Ces MEV réduisent notamment l’assurance (confidence) que les utilisateurs de la blockchain portent au réseau.La théorie des jeux non coopératifs qui sous-tend les relations sur les blockchains ne sont donc pas en mesure de prévenir les MEV inéquitables. Nous nous tournons donc vers les jeux coopératifs, et en particulier dans le contexte des biens communs pour éclairer la situation. La théorie ostromienne des biens communs, en particulier, ses huit principes permettent de proposer une nouvelle lecture des pratiques iniques de MEV, de leurs conséquences sur les utilisateurs du réseau, mais également des solutions existantes. Nous proposons aussi de nouvelles pistes, reposant sur une participation communautaire et réintroduisant les enjeux de confiance (trust) afin de préserver la fiabilité du réseau.
L’Industrie musicale québécoise
Authors: Barondeau Régis , Blanche Charlotte , Delage Simon
Published: April 2023

L’industrie musicale s’est emparée du phénomène des chaînes de blocs dans de nombreux champs d’applications allant de la relation au public à la gestion des droits en passant par les nouvelles possibilités de création. L’intérêt suscité pour cette nouvelle technologie est propulsé par un discours médiatique qui met en avant une plus-value monétaire pour les artistes et une facilitation de la gestion des données. En regardant le cas spécifique de l’industrie musicale québécoise, nous présentons comment les acteurs du milieu entrevoient l’adoption des technologies des chaînes de blocs, notamment au regard des enjeux de protection de l’exception culturelle musicale québécoise. Nous proposons avec cet article de participer à ces discussions en mobilisant l’aspect théorique des communs de la connaissance d’Oström à travers un scénario de création d’un registre distribué des métadonnées autogouvernées par les acteurs de l’industrie.
HYBRID AI MODEL FOR THE DETECTION OF RHEUMATOID ARTHRITIS FROM HAND RADIOGRAPHS
Authors: Ahalya R. K. , Snekhalatha U. , Krishnan Palani Thanaraj
Published: April 2023

The study aims to develop a computerized hybrid model using artificial intelligence (AI) for the detection of rheumatoid arthritis (RA) from hand radiographs. The objectives of the study include (i) segmentation of proximal interphalangeal (PIP), and metacarpophalangeal (MCP) joints using the deep learning (DL) method, and features are extracted using handcrafted feature extraction technique (ii) classification of RA and non-RA participants is performed using machine learning (ML) techniques. In the proposed study, the hand radiographs are resized to [Formula: see text] pixels and pre-processed using the various image processing techniques such as sharpening, median filtering, and adaptive histogram equalization. The segmentation of the finger joints is carried out using the U-Net model, and the segmented binary image is converted to gray scale image using the subtraction method. The features are extracted using the Harris feature extractor, and classification of the proposed work is performed using Random Forest and Adaboost ML classifiers. The study included 50 RA patients and 50 normal subjects for the evaluation of RA. Data augmentation is performed to increase the number of images for U-Net segmentation technique. For the classification of RA and healthy subjects, the Random Forest classifier obtained an accuracy of 91.25% whereas the Adaboost classifier had an accuracy of 90%. Thus, the hybrid model using a Random Forest classifier can be used as an effective system for the diagnosis of RA.
System Level Benchmarking of Public Clouds
Authors: Ahuja Sanjay P.
Published: April 2023

It is important for cloud users to be able to evaluate and compare different cloud services to achieve high performance and maximize cost savings. To that end, this research benchmarked Amazon web services elastic compute cloud and Rackspace cloud infrastructure and compared the results for the two public cloud providers. The intent of the study was to determine how these selected providers perform with regards to system parameter usage and hence three system-level benchmarks: STREAM, IOR, and NPB-EP were run on different configurations to provide an insight to the cloud users in selection of provider on VM clusters of 1,2,4,6, and 8 nodes. The clusters were created with similar virtual machines from both providers. The benchmarks examined bandwidth, I/O and CPU performance. A comparison of results for the two providers is presented graphically and T-test applied to determine if differences are significant. Observations were taken at multiple times at different time periods on weekdays and weekends to examine variance of cloud performance.
Impact of Human and Economic Development on Fake News Propensity During the COVID-19 Crisis
Authors: Shirish Anuragini , Kotwal Kanika
Published: April 2023

The advent of the COVID-19 pandemic augmented the propensity for fake news globally. Today, over 90% of the global population depends on the internet for information. However, there is an enormous difference in fake news propensity in different countries. Thus, one must understand what factors influence the propensity for fake news during the COVID-19 crisis. Leveraging prior literature on fake news, the authors theorize the relationship between human and economic development and fake news propensity within nations. They analyzed the proposed model on a dataset generated from 104 countries. The research finds that a level of human development did not affect a nation's fake news propensity, while a higher level of economic development curbed its fake news propensity. This research extends prior IS research on fake news at the macro level and aims to better inform governments and policymakers in designing future crisis-proof policies to curb fake news.
Analysis of a Vacuum-Infused Carbon Fiber/Epoxy Composite Beam under 3-Point Bending
Authors: Kerche Eduardo Fischer , Tonatto Maikson Luiz Passaia , da Silva Laís Vasconcelos , Amico Sandro Campos
Published: April 2023

In this paper, a hollow square cross-section carbon fiber/epoxy composite beam was designed and manufactured. Evaluation of the beam behavior considered orientation and stacking sequence, aiming to reduce the number of layers and weight. Finite element method (FEM) was used to simulate the performance of the composite beam under 3-point bending and using three failure criteria, Tsai-Hill, Tsai-Wu and maximum stress. In order to identify the input parameters for the model, flat composites were tested under tension and compression. It was concluded that a minimum of 12 layers of unidirectional carbon fiber were required to reach the required load (44.5 kN). The prototype was successfully fabricated by vacuum-infusion process and subjected to 3-point bending test. The experimental failure load was within the predicted range by the Tsai-Hill failure criteria and maximum stress.
Effect of Job Characteristic Factors on Turnover Intention of Skilled Labourers in CS2 Category Construction Companies in Sri Lanka: Mediating Role of Organizational commitment
Authors: Manjula C. , Galhena B. L. , Mudalige D. M.
Published: April 2023

At present, construction industry is one of the most important industries in Sri Lankan economy that is expected to develop further in the future as well. However, in recent years, employee turnover in the construction industry has become a major concern in Sri Lanka and this rate has continued to increase. High employee turnover can have a substantial effect on construction companies given their nature of work which require skills, experience, and knowledge base more than other industries. The purpose of this study was to investigate the factors influencing employee turnover intention. The main objective of the present study was to study the effect of job characteristic factors on organizational commitment and turnover intention of employees in construction sector employees in Sri Lanka. It also aimed to study whether organization commitment mediates the relationship between job characteristic factors and turnover intention. This study considered skill variety, task identity, task significance, job autonomy and job feedback as job characteristic factors. The quantitative research methods were used, and data were collected by using a questionnaire. The survey used a sample of 265 employees from 13 companies in Colombo district (CS-2 category). The sample was selected by using simple random sampling technique. Structured Equation Modelling method was used to analyze data. Results revealed that skill variety, task significance and job feedback were significantly related with turnover intention. Moreover, organizational commitment partially mediated the effect of these variables on turnover intention. However, task identity and job autonomy did not significantly relate with turnover intention. Therefore, managers should pay more attention on employee’s organizational commitment to reduce employee turnover intention. Skill variety, task significance and job feedback should be given priority in Sri Lankan context when considering job characteristic factors.
Anti-inflammatory, antibacterial and antioxidant activities of the medicinal species Atractylis cancellata
Authors: Mouffouk Sara , Mouffouk Chaima , Mouffouk Soumia , Mekki Ahmed Hachem , Moumen Messaoud Abderrahman , Haba Hamada
Published: April 2023

This research is focused on the estimation of total bioactive contents and the evaluation of in vitro pharmacological activities of crude extracts (petroleum ether, ethyl acetate and n-butanol) obtained from the species Atractylis cancellata. The antioxidant activity was assessed by three different techniques. The antibacterial activity was determined using the agar disk diffusion assay against five bacterial strains. Furthermore, the anti-inflammatory activity was evaluated by the ovalbumin method. According to the results, A. cancellata extracts are rich in several classes of secondary metabolites, especially steroids, triterpenoids, flavonoids, and alkaloids. In addition, the tested extracts showed very interesting antioxidant activities in DPPH (2,2-Diphenyl-1-picrylhydrazyl) and FRAP assays and important correlation coefficients between the results of antioxidant activities and total phenolic and flavonoid contents were found. Moreover, all the tested extracts displayed an antibacterial effect at least against three bacterial strains. The petroleum ether extract inhibited the growth of all the tested bacteria in a dose-dependent manner except Escherichia coli ATCC 25922 and it revealed a strong anti-inflammatory activity (81.77±0.05%). We conclude that A. cancellata could be an important source of natural pharmacological candidates against oxidative stress, inflammatory and microbial diseases.
Efficacy and safety of thoracoscopic cryobiopsy in patients with undiagnosed exudative pleural effusion
Authors: El Sayed Tamer A. , Mansour Ahmed El Sayed , Ali Raed El Metwally , El Hadidy Tamer A.
Published: April 2023

Background

Pleural effusions are either transudate or exudate according to the biochemical analysis of aspirated pleural fluid. Thoracentesis or blind pleural biopsy may not provide a definitive diagnosis. Cryobiopsy has more successful diagnostic results than forceps biopsies with complications (only hemorrhage) during procedures. Cryobiopsy can obtain more diagnostic biopsies due to the size of the biopsies and best property in expressions of an artifact-free sample area.

Results

This prospective intervention study was conducted on 51 patients who were divided randomly into two groups according to the biopsy technique: Group I (cryobiopsy group): 26 patients where patients will be subjected to thoracoscopic cryobiopsy. Group II (forceps group): 25 patients where patients will be subjected to thoracoscopic forceps biopsy. To demonstrate the efficacy and safety of taking biopsy specimens from parietal pleura in undiagnosed exudative pleural effusion. In the present study, the most common thoracoscopic finding was pleural nodules in 17 (65.4%) patients of cryobiopsy and 13 (53%) patients of forceps biopsy. The mean size in cryobiopsy was 14±4.2 mm, while in forceps biopsy, it was 5±0.6 mm. The most common pathological type of malignancy was the metastatic adenocarcinoma in 30 (58.8%) patients. The diagnostic yield of rigid medical thoracoscopy was 100% in both groups. Cryobiopsy was easily interpretable in the current study as focal and diffuse hemorrhage and crush artifact/atelectasis is less in biopsy. All procedures were generally well-tolerated by the patients in both groups, cryobiopsy was a painless procedure, while forceps biopsy was registered pain in 12 (48%) patients.

Conclusions

Cryobiopsies of the pleura using medical rigid thoracoscopy represent a safe and painless method to take biopsy and an effective tool to obtain larger tissue samples with a safe cellular architecture.