bluuebunny/crossref_metadata_2025 huggingface dataset:
ДИАГНОСТИЧЕСКИЕ УПРАЖНЕНИЯ И КОРОТКАЯ ТРЕНИРОВОЧНАЯ ПРОГРАММА ДЛЯ ПОДДЕРЖАНИЯ ОТДЕЛЬНЫХ СИЛОВЫХ ПОКАЗАТЕЛЕЙ.
Authors: Полтавец Юрий
Published: April 2023

Представленная программа специальной физической подготовки, направлена на сохранение силовой выносливости в условиях, когда полноценные и разнообразные по содержанию физические тренировки не могут быть проведены.
IMPACTOS AMBIENTAIS CAUSADOS PELA INDÚSTRIA PETROLÍFERA
Authors: De Almeida Meirilane Santos , De Lima Marcelo Gadelha , Martins Maria de Lourdes
Published: April 2023

O petróleo é utilizado como principal fonte de energia pela sociedade nas últimas décadas. Além do seu uso como forma de energia, o petróleo é utilizado em diversos fins tais como cosméticos, no ambiente da medicina e até na fabricação de plásticos. No entanto, ao longo do seu processamento, diversos impactos ambientais são gerados direta ou indiretamente, sendo alguns reversíveis e outros não, desde a degradação do solo, água e ar, atingindo assim todos os seres vivos. Assim, foram criados licenciamentos ambientais que obrigam as empresas a cumprir normas de preservação ambiental evitando assim possíveis danos à natureza. Dessa forma, o objetivo deste trabalho é apresentar os impactos gerados pela exploração, produção e consumo do petróleo, os licenciamentos obrigatórios para as empresas e possíveis soluções para reduzir a degradação ambiental. As soluções elencadas pretendem contribuir para a recuperação das áreas atingidas dentro de uma perspectiva sustentável.
ANÁLISE DO HIBISCO COMO INIBIDOR NATURAL DE CORROSÃO EM ENSAIOS DE IMPACTO NO AÇO CARBONO 1020
Authors: Martins Lourdes , Moreira Leonardo Finoti , Gomes Lumena C. , Abreu Cícero V.
Published: April 2023

Aço é um material de grande utilização na engenharia devido a sua significativa diversidade. Basicamente é composto por uma liga de ferro e carbono, diferenciando-se pela porcentagem de carbono presente em sua composição. Embora apresentem consideráveis propriedades mecânicas, quando submetidos a meios corrosivos, diversos equipamentos são degradados, o que acarreta elevados gastos com manutenção e até a substituição dos mesmos, além de um interesse econômico e tecnológico em métodos eficientes de combate à deterioração. Nesse contexto, os inibidores de corrosão têm sido utilizados, mas, apesar da eficiência dos inibidores convencionais, a relevância da questão ambiental tem motivado o estudo de inibidores naturais. Dessa forma, o objetivo do presente trabalho é avaliar a eficiência do hibisco como inibidor natural de corrosão através de ensaios mecânicos de impacto do aço carbono SAE 1020 em meio ácido. Inicialmente produziu-se extratos aquosos de hibisco para os ensaios. Após, foram realizados ensaios de perda de massa e de impacto com corpos de prova de Charpy em meio ácido, na ausência e presença do inibidor produzido. Os ensaios de perda de massa apresentaram resultados relevantes, onde consideráveis produtos de corrosão foram observados na superfície do corpo de prova do aço 1020 após a imersão em solução ácida sem inibidor. O efeito é atenuado em presença do inibidor natural. Durante os ensaios mecânicos de impacto, os corpos de prova na presença do inibidor exibiram um grau energia de absorção bem próximos ao corpos de prova sem o ataque corrosivo, o que indica a eficiência da inibição. Os resultados apontaram o decréscimo do processo corrosivo e inibição da redução das propriedades mecânicas em ensaios de impacto do aço na presença do inibidor de hibisco, o que demonstra a aplicabilidade do processo em uma perspectiva produtiva e ainda sustentável.
O DESENVOLVIMENTO DE UMA ESTRATÉGIA DE MARKETING PARA A MARCA CHIARA FERRAGNI COLLECTION NO BRASIL
Authors: Alves de Castro Charles
Published: April 2023

Este artigo descreve o desenvolvimento de uma estratégia de marketing para a marca Chiara Ferragni Collection, abordando o objetivo principal de "vender seus produtos dentro do mercado brasileiro". Para entregar um resultado substancial, este estudo oferece ao leitor uma breve descrição da empresa e do produto, referindo-se à indústria em que atua, sua participação de mercado, tendências, vendas e o mercado-alvo. Também, a ideia/conceito do produto destaca os benefícios e valor da marca para os clientes. Além disso, ao longo da estratégia é possível perceber os principais números da análise de mercado, aspectos do mercado-alvo, posicionamento do produto e o marketing mix de maneira geral. Esta pesquisa foi realizada por meio de uma revisão de literatura para apoiar dados e fatos secundários. No entanto, o principal método de pesquisa foi realizado através das técnicas de questionário, pesquisa e análise quantitativa. Isso é importante para demonstrar, explicar, validar e avaliar o principal achado nesta pesquisa. Além disso, a análise dos dados deu precisão e validação a este projeto, pois apresentou muitos números e fatos coletados através do levantamento. Os principais achados mostram uma forte possibilidade de penetração da marca Chiara Ferragni Collection dentro do mercado brasileiro.
GESTÃO DE PROJETOS E A ADMINISTRAÇÃO DE TEMPO COMO “FERRAMENTAS” DE COMPETITIVIDADE EMPRESARIAL
Authors: Souza Marcelo Pereira , De Oliveira Amanda Vieira
Published: April 2023

Em nossa atualidade, pelo menos aquela que versa sobre o “cenário mercadológico cada vez mais fluido”, revela-nos a não existência de barreiras e frontes consideradas impossíveis quanto a superação de flancos pela classe empreendedora, assim como, no sentido de angariar, prospectar, mas também de reter o target. Tão logo, às organizações empresariais não se marginalizaram frente a conjuntura contemporânea (no sentido de gerir projetos, tempo e sua competitividade), visto que se adequaram as novas demandas situacionais, reconfigurando sua empreitada de acordo com os novos projetos de cunho econômico, baseando-se em planejamentos concretos, realísticos e que não acarretassem em perda de tempo, tanto no sentido de atender às expectativas dos clientes quanto de sua própria função corporativa. Desse modo, este artigo, de modo lato sensu, resgata o diálogo da questão comportamental empresarial, isto é, em nível concorrencial, apresentando, teoricamente, caminhos que vão ao encontro do gerenciamento de projetos, articulando, ainda, essa premissa com o gerenciamento de tempo, uma vez que se tratam de questões problematizadores nos parâmetros da gestão empresarial atualmente. Para tanto, recorre-se a revisão de literatura, ao método bibliográfico, enquanto perspectiva metodológica adotada. Ademais, pretendemos o não esgotamento da discussão tripartite (gestão de projeto, gestão de tempo e a competitividade), sugerindo, entretanto, caminhos para uma breve reflexão à luz da Ciência Social Aplicada, com ênfase nas demandas da Administração de Empresas.
Nota sobre la fenología reproductiva de Tillandsia fasciculata var. clavispica Mez. (Bromeliaceae) en la Península de Varadero, Cuba
Authors: Verçoza Fábio de Castro
Published: April 2023

Este trabajo registró la ocurrencia de eventos reproductivos fenológicos como floración, fructificación y dispersión de semillas en Tillandsia fasciculata var. clavispica Mez. (Bromeliaceae) en la arenosa península de Varadero, Ciudad de Matanzas, Cuba. Los datos sobre la ocurrencia de episodios de floración y fructificación se obtuvieron a partir de la observación focal de individuos de Tillandsia fasciculata var. clavispica ocurre en una zona boscosa costera de suelo arenoso, en buen estado, ubicada en el balneario de Varadero, península ubicada en la Ciudad de Matanzas, a 130 kilómetros de La Habana, capital de Cuba. La recolección de datos se realizó mediante incursiones diarias a la vegetación, en el mes de enero de 2018. Varios individuos de T. fasciculata var. clavispica estaban en flor. Las inflorescencias están compuestas, ramificadas (de 15 a 20 ramas), con alrededor de 60 botones florales, protegidos por brácteas de un intenso color rosa. En cada inflorescencia, solo dos flores se abren cada día, con una floración secuencial, de baja intensidad pero larga. Las flores son inodoras, tubulares, de color violeta, con anteras amarillas, protegidas por brácteas de fuerte tono rosado, lo que hace que el conjunto sea visualmente muy colorido y atractivo. La especie presenta frutos maduros que liberan semillas después de un año de floración. Los frutos son secos y contienen muchas semillas blancas, diminutas y plumosas.
Repensar la arqueología de Piedras Blancas: cosas, espacios, personas y tiempos en relación (valle de Ambato, Catamarca, Argentina; s. VI-XI d.C.)
Authors: Laguens Andrés
Published: April 2023

Se presenta un estado de conocimiento sobre la arqueología del sitio Piedras Blancas, en el valle de Ambato, Catamarca, correspondiente a ocupaciones de sociedades Aguada entre los siglos VI y XI d.C. Se revisa la información disponible y se realiza una nueva aproximación al sitio, repensándolo desde otra mirada que intenta incluir la posible ontología nativa vigente en aquel momento. Se propone un acercamiento al sitio y a los problemas planteados por su registro arqueológico particular que toma en cuenta de manera experimental la ontología local como teoría propia acerca del mundo, considerada a la par con nuestra propia teoría antropológica y arqueológica. Se intenta desde allí avanzar en un entendimiento lo más situado posible de este caso, centrado en relaciones entre las personas y ciertas cosas, como cuerpos, espacios en las casas, animales y algunos objetos, como distintas clases de vasijas.
Exploraciones arqueológicas en la localidad de Tolombón: el sitio La Reservada Bajo (departamento Cafayate, Salta)
Authors: Scattolin María Cristina , Bugliani María Fabiana , Pereryra Domingorena Lucas , Cortés Leticia Inés , Taboada Marianela , Belotti López de Medina Carlos , Carbonelli Juan Pablo
Published: April 2023

Se dan a conocer los resultados de las investigaciones arqueológicas realizadas en el sitio La Reservada Bajo (Cafayate, Salta) cuyo objetivo consistió en la localización de un contexto cultural de la transición entre los períodos Formativo y Tardío de la secuencia histórica prehispánica. Para ello se realizaron tareas de registro de colecciones locales, prospecciones, recolecciones superficiales, relevamientos planimétricos y excavaciones. La investigación permitió identificar un establecimiento rural con una ocupación fechada a principios del segundo milenio de la E.C. Se reconstruyeron de manera parcial cuatro ollas cerámicas Ordinario Alisado y una tinaja Santa María Bicolor; además, se observó que el cuarzo fue la materia prima más utilizada para la talla y que el conjunto óseo está representado principalmente por camélidos. Finalmente, se discute la transición entre Formativo y Tardío a partir de las vinculaciones iconográficas en los estilos Guachipas Polícromo y Santa María y de la configuración arquitectónica del sitio.
Resultados iniciales del análisis del primer enterratorio inkaico contextualizado en Antofagasta de la Sierra (Puna meridional argentina)
Authors: Pérez Martina Inés , Clur Alejo Adrián , Miranda Paula , Olivera Daniel Enzo
Published: April 2023

Presentamos los primeros resultados del análisis del sitio Casa Eladio Reales I (CER I), Antofagasta de la Sierra, Puna de Catamarca. El sitio se compone de estructuras funerarias en las que se hallaron restos humanos, artefactos cerámicos, óseos, metálicos, de madera y material malacológico. El análisis cerámico revela la presencia de materiales Inka-provincial, Yocavil Polícromo, Santa María, Caspinchango y Belén. Se relevó la presencia de quince individuos de ambos sexos y diversos grupos de edad. Estos restos muestran una representación de gran parte de las regiones anatómicas, así como un buen grado de preservación general. Los elementos del ajuar dan cuenta de un tratamiento especial de los individuos allí inhumados y ponen de manifiesto que estos podrían haber ocupado un lugar importante dentro de la sociedad, quizás ligados de manera estrecha a las estrategias de dominación inkaica de la región.
Más allá de lo visible: materias primas y estándares de pastas de la cerámica de la quebrada de Pajchela (Puna de Jujuy, Argentina) durante el Período de Desarrollos Regionales Tardío e Inka/Colonial Temprano (1200-1660 d.C.)
Authors: Di Tullio Martina
Published: April 2023

Los vínculos de la Cuenca Superior del río Grande de San Juan (Puna de Jujuy) con otras zonas de la región durante los períodos Tardío e Inka/Colonial Temprano aún continúan inciertos. Las características superficiales de la cerámica recuperada en dos sitios cercanos a la localidad de Cusi Cusi han despertado diversas hipótesis al respecto, debido a sus similitudes con estilos definidos para la región. En este trabajo se presentan los resultados del análisis submacroscópico del material alfarero, a través cual del se identificaron las materias primas utilizadas y se definieron por primera vez estándares de pastas locales. Considerando la distribución temporal de estos grupos de pastas y su asociación con los tratamientos de superficies, la continuidad de las elecciones tomadas en las primeras etapas de la cadena operativa permite dudar de la relevancia de las materias primas para distinguir entre tradiciones tecnológicas del pasado.
De las huellas a las técnicas: un abordaje experimental de las formas de aplicación de las pinturas rupestres de La Candelaria (Catamarca)
Authors: Landino Matias , Ahets Etcheberry Eugenia , Gheco Lucas , Gastaldi Marcos R. , Tascon Marcos , Quesada Marcos , Marte Fernando
Published: April 2023

Las técnicas de aplicación de las pinturas rupestres resultan fundamentales para comprender sus procesos de producción, pues permiten acceder a las interacciones constitutivas entre seres, materiales, tiempos y espacios que se entablan al hacer los motivos. Sin embargo, son escasas las investigaciones centradas en identificar marcadores materiales específicos que permitan diferenciar entre la multiplicidad de técnicas de aplicación posibles. En líneas generales, estas se han inferido a partir de criterios poco explicitados. Este trabajo plantea un abordaje experimental de cuatro técnicas de aplicación (digital, con hisopo, con pincel y con palito) con vistas a detectar huellas específicas a cada una. Posteriormente, se aplican estos conocimientos para avanzar en el relevamiento macroscópico de las pinturas rupestres de la cueva de La Candelaria (departamento Ancasti, Catamarca). Ello posibilitó identificar huellas de diversas técnicas de aplicación en las pinturas del sitio, demostrando la importancia de retroalimentar los relevamientos in situ con estudios experimentales.
HARDWARE AND PSYCHOLOGICAL INDICATORS OF INDIVIDUAL OBJECTIVIZATION OF PSYCHOPHYSICAL ABILITIES OF YOUTH
Authors: BOLTIVETS Sergei
Published: April 2023

The article substantiates the relevance of tempering youth on the psychophysiological basis of identification of a young person in his own self-awareness. Its individual psychological reflection is embodied in the psychophysiological parameters of specially created for this purpose and manufactured psychological devices "Duzhin", "Pyatra", "Rin" and others, which are distinguished by the uniqueness of both the design and the technical implementation. The psychological system "Duzhin" ensures the definition and development of the ability to emotional and volitional self-regulation without age restrictions, as a rule, starting from the age of three - with the acquisition of the ability to imitative reproduction of psychomotor action. Measuring the coefficient of emotional-volitional regulation using the psychological device "Duzhin" allows to establish the individual dynamics and development of emotional-volitional regulation caused by the development of primary control of impulses - psychomotor processes of brain self-control of one's own activity by periodically determining the variability of its coefficients; to develop the ability for emotional-volitional self-regulation of psychomotor processes of cerebral self-control of one's own activity, to focus the volitional function of the psyche on conscious management of one's own actions and regulation of behavior, to carry out psychological correction of impulsive behavior caused by a violation of impulse control. The "Pyatra" device has five main levels of complexity, the mastery of which reveals psychomotor abilities in their creative expression, allows you to go beyond the proposed standard tasks and randomly try to implement your own options for performing psychomotor exercises. "Piatra" contains a subtest for measuring the psychomotor praxis of thinking "Rin for distinguishing indicators of mental development F-70 - 73, determining related intellectual functioning as a conditional mental norm - related to the sufficiency of mental development, as well as a special mental ability. The indicators recorded in the protocol are given psychological examination according to the scale of the psychomotor praxis of thinking "Rin". The fundamental principle embodied by the above means of objectification of individual self-awareness of psychophysical abilities is the mythologemes of community, which includes everyone and does not reject anyone from the human population commensurate with the possibilities of their own psychophysical development.
Illír bükkös (Vicio oroboidi-Fagetum) erdőtársulás részletes cönológiai vizsgálata
Authors: Somogyi Zoltán , Juhász Magdolna
Published: April 2023

The investigated illyrian beech forest is situated in SW Hungary. Its canopy is dominated by Tilia tomentosa and Fagus sylvatica. Statistics of phytosociological characters, flora elements, life forms and social behaviour types are given. The surveyed stands are near-natural characterised by following specialists: Ruscus hypoglossum, Lathyrus venetus, Aremonia agrimonioides, Staphylea pinnata, Galanthus nivalis, Isopyrum thalictroides, Listera ovata, Anemone nemorosa, Hepatica nobilis
A kárókatona fészekalj és tojásméret vizsgálata a Kis-Balatonon és a Nagyberekben
Authors: Kovács Gyula , Winkler Dániel , Faragó Sándor
Published: April 2023

Study on some breeding parameters of the Great Cormorant (Phalacrocorax carbo sinensis) was carried out in 2005 on Kis-Balaton and in 2009 in the Nagyberek Fehérvíz Nature Conservation Area. Mean (±SE) of clutch size was 3.51±0.15 (N=41) on Kis-Balaton and 3.27±0.19 (N=11) on Nagyberek while ranges of clutch size were 1–6 and 3–5, respectively, that didn’t show significant differences (F= 0.38, p= 0.68) compared with earlier Hungarian data. Mean of egg sizes (length±SE x width±SE), shape index and egg volume were 62.0±0.2 x 39.1±0.1 mm, 1.59±0.01 and 48.38±0.34 cm3 on Kis-Balaton (N=137), while their values were respectively 61.6±0.5 x 38.2±0.2 mm, 1.61±0.02 and 45.94±0.69 cm3 on Nagyberek (N=29). Egg weight was measured only on Kis-Balaton (53.0±0.4 g, N=135). Comparing the results of the two areas, significant differences were found on egg width (t=3.15, p=0.002) and volume (t=3.02, p=0.003), while no statistical differences were found when comparing the other egg parameters measured.
Botanical survey of Southern Transdanubian oxbow lakes and the changes of the last 10 years
Authors: Balázs Adrienn , Erdős László
Published: April 2023

We studied six oxbow lakes along the River Drava with the Kohler-method. Oxbow lakes were chosen, in which occurences of Nymphaea alba were mentioned earlier. In comparison to the former studies, the quantity of Nymphaea alba has decreased dramatically in most oxbow lakes. Moreover, several other water-weeds have disappeared. Probably, this problem is caused by the settlement of Ctenopharyngodon idella, the grubbing-up of water-weeds, the pollution from the nearby cultivated fields and the fact that nature conservational aspects are not considered in the management of the lakes. The invasive weed species have mostly spread at Bresztik and Zalátai Ó-Dráva while at the other oxbow lakes, their quantity has been found generally low. Among the invasive species, Solidago gigantea seems to be the most dangerous.
Stability of equilibrium price-production of dynamic duopoly Bertrand–Cournot game in a transnational supply chain with asymmetric information
Authors: Long Jianjun , Wang Fenglian
Published: April 2023

Bounded rationality, asymmetric information and foreign trade are widespread in the economic market, and have been studied extensively in oligopoly games, but there are not many works discussing asymmetric information and bounded rationality in the supply chain hybrid game. In contrast with existing works, in our study, we innovatively construct a duopoly Bertrand–Cournot game model in a transnational supply chain with bounded rationality and asymmetric information. It is assumed that upstream firm 1 knows all the market information and adopts boundedly rational expectation, while downstream firm 2 only partially knows the market information and uses naïve expectation. Based on game theory and nonlinear dynamic theory, the complexity of the discrete system is analysed with respect to effective information, shareholding ratio and price sensitivity. Results reveal the following: (i) When the downstream firm knows little about the price information of the upstream firm, the market may be unstable or even chaotic; otherwise, it is conducive to the stability of the product market. (ii) When the shareholding ratio or the price sensitivity is relatively small, the market is more stable, and as they increase, the discrete price-production system goes through bifurcation and eventually falls into chaos. Our research has an important theoretical and practical significance for price-production supply chain competition in oligopoly markets.
A clinical case of a newly diagnosed carcinoma of the nasal cavity
Authors: Karpishchenko S. A. , Vereshchagina O. E. , Bolozneva Ye. V. , Korolevskaya V. A.
Published: April 2023

This article presents a rare clinical case of a newly diagnosed carcinoma of the nasal cavity in a young woman. The clinical symptoms of this disease are scarce, complaints are typical for most diseases of the ENT organs. The final verification of the diagnosis is possible on the basis of histological examination of the surgical material.
Female urethroplasty with a flap of the oral mucosa in a patient with in idiopathic urethral stricture. Clinical case
Authors: Al-Shukri A. S. , Ponomareva Ju. A. , Maksimova A. V. , Dub N. I. , Andriyanov A. A. , Manchenko A. A. , Petrov S. B.
Published: April 2023

This article presents a clinical case of a rare pathology in urological practice – idiopathic stricture of the female urethra, considers the tactics of patient management and the method of surgical correction.
Professor Nikolai Alekseevich Bogoraz (1874–1952)
Authors: Polishchuk M. A. , Borovets S. Yu. , Al-Shukri S. H.
Published: April 2023

This article contains historical aspects of the life of the great Russian scientist and surgeon – Nikolai Alekseevich Bogoraz. The work is devoted to the scientific discoveries of Nikolai Alekseevich in the field of urology, operative surgery, as well as the main points of the biography of N. A. Bogoraz are described here: the path from a student of the Military Medical Academy to an outstanding Russian surgeon. Nikolai Alekseevich was born on February 1 (13 according to the Julian calendar), 1874 in the city of Taganrog, Donskoy Army region – modern Rostov region. The future famous scientist and surgeon, Nikolai Alekseevich, graduated with a gold medal at first from the Tiflis Gymnasium in 1892, and then from the Military Medical Academy in 1897, graduating with the degree of «doctor with honors». Further, N. A. Bogoraz had a long, multidisciplinary professional path. In 1920, Nikolai Alekseevich lost both lower limbs because of a traffic accident, which gives a halo of heroism to the image of the professor. However, this tragic accident did not hindered the talented surgeon from creating a monumental work that glorified N. A. Bogoraz in the world medical community, – «Reconstructive surgery» in two volumes. N. A. Bogoraz died at the age of 78 on July 15, 1952 from repeated myocardial infarction and was buried at the Vvedenskoye cemetery in Moscow.
On the 95th anniversary of the birth of Mikhail Ivanovich Dolgorukov
Authors: Demko А. E. , Kokhanenko N. Yu. , Peregudov S. I. , Pichuev A. V. , Kulagin V. I.
Published: April 2023

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EDUCAÇÃO MUSICAL UMA FERRAMENTA PEDAGÓGICA IMPORTANTE PARA O PROCESSO DE ENSINO E APRENDIZAGEM DA CRIANÇA
Authors: Lopes Fabrício de Oliveira , Ferraz Isaque Rodrigues , Ferraz Ismael Rodrigues , Barbosa Leandro Freitas
Published: April 2023

Desde os primórdios e por intermédio de diversas personalidades, a educação musical foi utilizada com a finalidade progressiva para o desenvolvimento de ensino e aprendizagem educacional. O estudo da música na sua forma física e psíquica estimula o cérebro e impulsiona a inteligência, fomenta a socialização e instrui o indivíduo na compreensão de vários conceitos educacionais. Neste sentido, o objetivo da presente investigação foi estudar, através de apontes teóricos, as nuances significativas da educação musical no processo de ensino e aprendizagem da criança. A metodologia do trabalho encontra-se organizada de forma qualitativa e descritiva, com propósito de contemplar a revisão de leitura sobre o referido tema, buscando ainda uma melhor compreensão do assunto abordado. Dessa forma, foram utilizados, para suporte e construção da base científica, os recursos de pesquisas bibliográficas e referenciais teóricos, tais como: livros, revistas, jornais, artigos científicos e dissertações publicadas nos últimos setenta anos. Os resultados da análise apontaram para uma súmula histórica da educação musical; os conceitos da normatização da Lei de educação musical nº 11.769/2008; os benefícios da aprendizagem musical; as questões do estímulo cerebral dos indivíduos através da música; a interdisciplinaridade e o apófise de ensino-aprendizagem mediante a expressividade dos sons. Portanto, percebe-se que a síntese dos sons sempre será uma tentativa ou estratégia para a elaboração das mais variadas ações que promovam: educação, filosofia, religiosidade, inclusão social, ciências, artes, cultura e saúde.
Aerodynamic Appraisal of the VEGA-C Launcher
Authors: Roncioni Pietro , Luigi Vitagliano Pier , De Gregorio Fabrizio , Pezzella Giuseppe , Romano Luca , Paglia Fabio
Published: April 2023

In the framework of the VEGA Consolidation and Evolution Preparation Program, carried out by the European Space Agency to develop the VEGA-C launcher, several aerodynamic design activities have been performed with the help of both numerical and experimental campaigns. The results of those design efforts contributed to the definition of the launcher aerodynamic database, necessary to feed flight mechanics and vehicle performance characterizations. Launcher aerodynamic database is obtained by means of a buildup approach that exploits several contributions ranging from engineering judgments, flowfield numerical analyses, and wind tunnel tests. The final aerodynamic database has been also provided with suitable uncertainty models to assure reliable estimations of the launcher aerodynamic coefficients in the ranges of Mach, altitude, and attitude, expected for the vehicle along with the ascent flight. In this paper, the final aerodatabase and the whole building process are presented and discussed in detail. Finally, comparisons between wind tunnel data and results of flowfield simulations are also shown, together with extrapolation to flight judgments to accommodate for the Reynolds number effects. Result comparisons highlight that numerical and experimental data compare rather well, thus confirming the reliability of the present design efforts.
Polyarteritis Nodosa: Clinical Cases in Boys 12 and 9 Years Old
Authors: Burlutskaya A. V. , Tril V. E. , Saveleva N. V. , Ustuzhanina D. V. , Pisotskaya Ju. V. , Bogacheva S. M.
Published: April 2023

Background. Polyarteritis nodosa is an acute, subacute or chronic immune complex disease associated with peripheral and visceral artery involvement, predominantly of middle and small sizes, development of destructive-proliferative arteritis and subsequent peripheral and visceral ischaemia.

Cases description. The present paper describes two clinical cases of polyarteritis nodosa in patient R., aged 12, and patient A., aged 9, and demonstrates the difficulties of diagnosing the disease in its early stages. Patient R., aged 12, was admitted to the Rheumatology Unit of the Krasnodar Krai Children’s Clinical Hospital with complaints of red, patchy, dense rash on the palms and plantar surface of the feet. The child has been ill since September 2017, and after a history of tonsillitis suffered a fever of 37 °C, pain in the right heel area, nodular thickening on the feet, livedo reticularis, swelling of both hands. The disease had a recurrent course. The boy was treated with prednisolone, mycophenolate mofetil, hydroxychloroquine and three courses of rituximab (April 2018, January 2019, September 2020). Repeated courses of human normal immunoglobulin and alprostadil therapy were carried out. The treatment showed positive dynamics, fever was eliminated, general well-being improved, and acute inflammatory markers in blood became normal. The skin retained minimal manifestation of livedo, nodularities on the feet did not progress in dynamics. Patient A. was admitted to the Rheumatology Unit of the Krasnodar Krai Children’s Clinical Hospital in April 2022 with complaints of weakness, myalgia of the lower extremities and necrosis foci in the left lumbar region. The medical history indicates that in March 2022, the boy, being in good health before, developed a bluish, painful rash on his lower legs after a workout. Skin changes and soreness resolved on their own without treatment. After examination, a diagnosis was made as follows: juvenile polyarteritis nodosa, activity score — 3.

Conclusion. The diagnosis of polyarteritis nodosa can be often problematic due to the very character of the disease featured by absence of specific symptoms, by polymorphism of clinical manifestations, and by lack of clear diagnostic and laboratory markers.
Abiotrophia defectiva: A rare and lethal but an easy miss!
Authors: Prakruthi S. , Mishra Jayashree , Sharma Disha , Nalwalla Zahabiya
Published: April 2023

Abiotrophia defectiva is a nutritionally deficient streptococci, a rare pathogen of infective endocarditis (IE) in children but is frequently known to cause valvular dysfunction and embolic complications. Only nine cases of A. defectiva endocarditis have been reported so far in world literature. We report a case of A. defectiva endocarditis in a 7-year old girl, with a small peri membranous ventricular septal defect with congenital bilateral sensorineural hearing loss status post left-sided cochlear implantation who presented with prolonged fever. A. defectiva should be considered in children with endocarditis with a subacute course and atypical presentations. Although fastidious in growth it is a virulent bacterium preferentially affecting endovascular structures and is implicated in many culture negative endocarditis. Our case reiterates the possibility of a rare cause of this common disease and the challenges encountered while isolating this nutritionally deficient organism and its treatment.
Non-Oxidative Coupling of Methane: Interplay of Catalyst Interface and Gas Phase Mechanisms
Authors: Zhang Seraphine B.X.Y. , Copéret Christophe
Published: April 2023

Non-oxidative coupling of methane (NOCM) is a sought-after reaction that has been studied for decades. Harsh reaction conditions (T >800°C) in the face of limited catalyst stability lead to rapid catalyst deactivation and strong coking, preventing application thus far. Recent reports have shown the significance of an interplay of catalyst nature and reaction conditions, whereas metal carbides have prevailed to play a crucial role which involves incorporation of carbidic carbon in C2Hx and aromatic products. This perspective gives an overview of proposed mechanistic pathways and considerations about experiment conditions in order to foster a rational catalyst design platform for NOCM.
Chemical Recycling of Polymethacrylates Synthesized by RAFT Polymerization
Authors: Wang Hyun Suk , Anastasaki Athina
Published: April 2023

Reversing controlled radical polymerization and regenerating the monomer has been a long-standing challenge for fundamental research and practical applications. Herein, we report a highly efficient depolymerization method for various polymethacrylates synthesized by reversible addition-fragmentation chain-transfer (RAFT) polymerization. The depolymerization process, which does not require any catalyst, exhibits near-quantitative conversions of up to 92%. The key aspect of our approach is the utilization of the high end-group fidelity of RAFT polymers to generate chain-end radicals at 120 °C. These radicals trigger a rapid unzipping of the polymethacrylates. The depolymerization product can be utilized to either reconstruct the linear polymer or create an entirely new insoluble gel that can also be subjected to depolymerization. Our depolymerization strategy offers a promising route towards the development of sustainable and efficient recycling methods for complex polymer materials.
Uncovering the Untapped Potential of the Use of Sodium Amides for Regioselective Arene Functionalisation
Authors: Tortajada Andreu , Hevia Eva
Published: April 2023

Alkali-metal amides have become key reagents in synthetic chemistry, with special focus in deprotonation reactions. Despite the higher reactivity found in the heavier sodium and potassium amides, their insolubility and low stability has favoured the use of the more soluble  lithium analogues, converting them into the most used non-nucleophilic bases. Studying the coordination effects of Lewis donor molecules such as tridentate amine PMDETA (N,N,N’,N’’,N’’-pentamethyldiethylenetriamine) in combination with the sodium amide NaTMP (TMP = 2,2’,6,6’-tetramethylpiperidide), we have been able to unlock the use of these reagents for the functionalisation of arenes, i.e. the deuterium incorporation by hydrogen isotope exchange and the deprotonative borylation of unactivated arenes. These findings show how sodium amides are not just a simple more sustainable replacement of their lithium counterparts, but also that they can display significantly enhanced reactivities allowing for the development of new transformations.
HARVESTING HARDWOOD SAP IN THE FAR EAST
Authors: Шемякина А.В.
Published: April 2023

В статье представлены биологические запасы березового и кленового соков на Дальнем Востоке. Заготовка и сбор березового сока на арендованных участках (заготовительные пункты, наименование лесопользователя).

The article presents the biological stocks of birch and maple sap in the Far East. The harvesting and collection of birch sap on leased plots (harvesting points, name of forest user).
Resolving the structural complexity of gamma-Al2O3: the nature of vacancy ordering and the structure of complex antiphase boundaries
Authors: Kovarik Libor , Bowden Mark , Khivantsev Konstantin , Kwak Ja Hun , Szanyi Janos
Published: April 2023

The structure of gamma-Al2O3 remains largely undetermined despite decades of research. This is due to the high degree of disorder, which poses significant challenges for structural analysis using conventional crystallographic approaches. Herein, we study the structure of gamma-Al2O3 with Scanning Transmission Electron Microscopy (STEM) and ab-initio calculations to provide a complete structural description. We show that the microstructure can be understood in terms of two key structural features of nanoscale spinel domains and finite thickness segments termed as complex antiphase boundaries (cAPB) that provide the domain interconnectivity. The spinel domains have a distinctive preference for vacancy ordering, which can be rationalized in terms of a structure with a stacking disorder. Tetragonal P41212 or monoclinic P21 models, all based on the identical motif, can be considered as representative ordered forms. Individual spinel domains are interconnected via cAPBs, which adopt a distinct non-spinel bonding environment of gamma-Al2O3. The most common cAPB consists of a single delta motif with thickness of just 0.6 nm on (001), with the resulting displacement a/4 [101]. Remarkably, the cAPBs are shown to energetically stabilize the spinel domains of gamma-Al2O3 explaining their high abundance. We demonstrate how the tetragonal distortions naturally arise in this intricate microstructure and place the proposed model in the context of phase transformations to high temperature transition aluminas.
1,2-Redox Transpositions of Tertiary Amides
Authors: Shennan Benjamin , Sánchez Alonso Sergio , Dixon Darren
Published: April 2023

Reactions capable of transposing the oxidation levels of adjacent carbon atoms in organic molecules enable rapid and fundamental alteration of a molecule’s reactivity. Herein, we report the 1,2-transposition of carbon atom oxidation level in cyclic and acyclic tertiary amides, resulting in the one-pot synthesis of 1,2- and 1,3-oxygenated tertiary amines. This oxidation level transfer was facilitated by the careful orchestration of an iridium-catalyzed reduction with the functionalization of transiently-formed enamine intermediates. Remarkably, a novel 1,2-carbonyl transposition was observed when the commercial oxidant mCPBA was selected as the coupling partner. The scope of this transformation and the breadth of this redox transposition strategy has been explored and the diverse β-functionalized amine products were shown to be multi-faceted and valuable synthetic intermediates, accessing challenging biologically-relevant motifs.
Substrate effect on the structure and properties of Cu clusters supported on ZnO
Authors: Love-Nkansah Chasity , Jayamaha Peshala , Wang Lichang
Published: April 2023

To understand the interaction between the Cu clusters and the ZnO substrate, we performed density functional theory (DFT) calculations on the adsorptions of small copper clusters on the ZnO(100) surface. The PBE functional was used in the DFT calculations with a plane wave basis set. The structural changes of the Cu clusters upon adsorption on the ZnO surface were provided. Although a few different adsorption sites are available, a single Cu atom was found to be adsorbed on three positions on a ZnO(100) surface. The adsorption strength of a Cu dimer is increased with respect to the adsorption of a single Cu atom. In the adsorptions of tetramers, and pentamers, three-dimensional configurations of Cu clusters are more favorable than the planer.
Hydrogen Generation by Hydrolysis of Magnesium Hydride in Organic Acids Solutions
Authors: Lototskyy Mykhaylo , Davids Moegamat Wafeeq , Sekgobela Tshepo Kgokane , Arbuzov Artem , Mozhzhukhin Sergey , Zhu Yongyang , Tang Renheng , Tarasov Boris
Published: April 2023

Hydrolysis of MgH2 has a high theoretical hydrogen yield (15.2%) and is very attractive for onsite hydrogen production. However, the low solubility of Mg(OH)2 causes sluggish kinetics and incomplete utilization of MgH2. In this paper, we solve this problem by using organic acids (acetic, citric and oxalic) and nanoscale graphene-like carbon. The organic acid solution significantly increases the yield and rate of H2 generation due to its acidic nature. The hydrogen yield approaches 100% with a fast hydrolysis rate when the molar ratio Acid/MgH2 exceeds 0.9, 2.0 and 2.7 for the citric, oxalic and acetic acid, respectively. In doing so, pH of the reaction solutions after hydrolysis corresponds to 4.53, 2.11 and 4.28, accordingly, testifying about buffer nature of the solutions “citric acid / magnesium citrate” and “acetic acid / magnesium acetate”. The addition of graphene-like material (GLM) also significantly increases the yield and rate of H2 generation due to the decrease of particle size and increase of defects in the material, as well as due to stabilising the MgH2 nanoparticles and preventing their agglomeration. Additionally, GLM encapsulates the MgH2 particles thus suppressing the formation of MgO and, in turn, promoting achievement of the maximum hydrogen yield. In addition, this work presents layout and operation features of the developed apparatus for the controlled generation of pressurised hydrogen using hydrolysis of Mg or MgH2 in acidic solutions, as well as its testing results for the hydrolysis of Mg and MgH2 in the solution of citric acid.
Time-resolved in-situ nanoparticle size evolution during magnetron sputtering onto liquids
Authors: Eneren Pinar , Sergievskaya Anastasiya , AKSOY Yunus Tansu , Umek Polona , Konstantinidis Stephanos , Vetrano Maria Rosaria
Published: April 2023

Aggregation and growth of silver nanoparticles (Ag NPs) occur both at the plasma-liquid interface and inside the silicone oil during and after the magnetron sputtering. Despite the same amount of deposited silver, the growth kinetics of Ag NPs in silicone oil vary at different deposition rates. Stirring helps to disaggregate the particle lumps. The Light Extinction Spectroscopy (LES) technique is employed for the first time to in-situ and real-time characterize the particle size distribution (PSD) during and after the sputtering of the silver atoms onto silicone oil, i.e., Sputtering onto Liquids (SoL) process. The effects of the deposition rate and the stirring speed on the PSDs are analyzed. Based on De Brouckere mean diameters, the size evolution of Ag NPs over time is monitored. Via the LES technique, Ag NPs bigger than 20 nm are detected, and the PSDs are shown to be poly-disperse, which is also supported by the ex-situ TEM measurements and in-situ time-resolved absorption spectra. At higher deposition rates, larger NPs are formed. Faster stirring does not substantially influence the final size but promotes the formation of smaller NPs (<20 nm). Low colloidal stability of Ag NPs in silicone oil is also observed.
An Assessment of Brand Loyalty, Perceived Quality and Price as Antecedents of Purchase Decision: Evidence From Ghana’s Textile Industry
Authors: Senayah W. K. , Metsiwodzi H. , Biney-Aidoo V. , Anyanful T. K. , Frimpong Opuni F.
Published: April 2023

Purpose: The main purpose of this study is to assess the effects of brand loyalty, perceived quality and perceived price on purchase decisions among buyers in Ghana's textile industry.

Design/Methodology/approach: The current study was quantitative in nature and involved gathering and analysis of cross-sectional data. The study gathered quantitative data from a representative sample of 500 customers from Accra, Ghana. Descriptive and inferential statistics were applied in analysing primary data. A structural equation modelling approach with IBM SPSS AMOS software was used to assess the nature of the nexus between the identified variables.

Findings:  The findings suggested that the predictors: brand loyalty, perceived price, and perceived quality separately and jointly have a significantly positive effect on purchase decisions for Ghanaian textile products.

Practical Implications: This study has practical implications for using branding to gain a competitive advantage. Textiles firms using ‘made in Ghana’ branding, a good communication strategy on product quality can influence purchase intention and build brand loyalty among buyers.

Social Implications: The study's findings on the influence of cultural factors on purchase decisions can have important social implications. By understanding how social norms, values, and beliefs affect consumer behaviour, policymakers can develop policies and regulations that support sustainable and ethical practices in the textile industry.

Original Value: The novelty of this study lies in its investigation of the relationship between brand loyalty, perceived quality, price, and purchase decisions in the context of Ghana's textile industry. While there is some research on these factors in other industries and regions, there is a lack of comprehensive studies on how they affect purchase decisions in the textile industry in Ghana.
Heart Diseases by Professor Dmitry D. Pletnev (for the reprint of D.D. Pletnev's monograph “Heart Diseases”, 1936)
Authors: Chuchalin Alexander G. , Bobkov Eugeny V.
Published: April 2023

The article presents a brief review of Heart Diseases (1936), the monograph by one of the founders of domestic and world cardiology Dmitry Dmitrievich Pletnev. In the monograph, he summarized his clinical and experimental approach to the issues of heart diseases, addressed several fundamental problems of modern physiology and healthcare, introduced the concept of functional unit and functional unity of the whole body, the concept of the extracardiac genesis of the chest frog, differential diagnosis of left and right ventricle myocardial infarction, semiotics and treatment of chronic heart failure, functional diagnosis of heart arrhythmias. All these approaches and concepts have long been included in the classics of world cardiology.
Structural insights into ubiquitin chain cleavage byLegionellaovarian tumor deubiquitinases
Authors: Kang Sangwoo , Kim Gyuhee , Choi Minhyeong , Jeong Minwoo , van der Heden van Noort Gerbrand J , Roh Soung-Hun , Shin Donghyuk
Published: April 2023

Although ubiquitin is found only in eukaryotes, several pathogenic bacteria and viruses possess proteins that hinder the host ubiquitin system.Legionella, a gram-negative intracellular bacterium, possesses an ovarian tumor (OTU) family of deubiquitinases (Lot DUBs). Herein, we describe the molecular characteristics of Lot DUBs. We elucidated the structure of the LotA OTU1 domain and revealed that entire Lot DUBs possess a characteristic extended helical lobe that is not found in other OTU-DUBs. The structural topology of an extended helical lobe is the same throughout the Lot family, and it provides an S1′ ubiquitin-binding site. Moreover, the catalytic triads of Lot DUBs resemble those of the A20-type OTU-DUBs. Furthermore, we revealed a unique mechanism by which LotA OTU domains cooperate together to distinguish the length of the chain and preferentially cleave longer K48-linked polyubiquitin chains. The LotA OTU1 domain itself cleaves K6-linked ubiquitin chains, whereas it is also essential for assisting the cleavage of longer K48-linked polyubiquitin chains by the OTU2 domain. Thus, this study provides novel insights into the structure and mechanism of action of Lot DUBs.
List of peer reviewers for issue 25
Authors: Higgins Joanna
Published: April 2023

List of peer reviewers for issue 25
Cognitive Science and the Study of Syntactic Speech Construction: Modern Issues
Authors: Konurbaev M. E. , Andreeva E. Yu.
Published: April 2023

This article deals with the problem of applying the discourse approach to the analysis of different types of texts, which is of paramount importance for modern linguistics. The subject of the study is the syntactic structure of different types of contemporary media texts. The purpose of the research is to broaden the ways of the discourse analysis with the help of cognitive science. The relevance of the topic of the present paper is determined by the rapid development of studies in the sphere of cognitive linguistics and the need to apply the latest approaches to the analysis of the syntactic structure of speech. The scientific novelty lies in the fact that the authors single out modern trends in syntactic analysis of speech construction on the example of contemporary media texts and give an outlook on further significant developments in the sphere, discussing the issue of developing and optimizing telescopic texts for the purposes of modern science, management, education and other essential spheres of life. Within the framework of the present study, the authors used the methods of system analysis, analysis of statistical data, official documents and works of the consummate professionals in the sphere of the cognitive science. Based on the results of the research, it was revealed that modern technologies give marvellous opportunities to create a specific digital data format of various texts, associated development and display tools. The authors concluded that the “telescopic text” is now becoming a way for effective digital communication and information exchange.