bluuebunny/crossref_metadata_2025 huggingface dataset:
Les perceptions polonaise et balte de la politique allemande dans le conflit russo-ukrainien depuis février 2022
Authors: Weber Pierre-Frédéric
Published: March 2023

L’invasion russe en Ukraine, par le changement de forme et d’échelle qu’elle signifie dans ce conflit en cours depuis au moins huit ans, a révélé les erreurs commises depuis le début des années 2000 par l’Allemagne dans son évaluation de la nature du régime russe et de ses intentions en Europe. Après avoir ignoré pendant des années les nombreux appels à la prudence des principaux acteurs d’Europe centrale et orientale, en particulier de la Pologne et des pays baltes, Berlin a dû brutalement opérer une révision complète de sa politique à l’est – à la fois dans le domaine de la défense et de la sécurité énergétique. Toutefois, au regard des hésitations persistantes du gouvernement allemand, le changement d’époque ( Zeitenwende ) annoncé par le chancelier Olaf Scholz peine à convaincre ses partenaires de Tallinn à Varsovie en passant par Vilnius, alors que le centre de gravité de l’Union européenne semble se déplacer vers l’est.
Et après le décès d’un proche aidé…
Authors: Zech Emmanuelle , Westrelin Nicolas , Boever Camille
Published: March 2023

Que se passe-t-il pour les proches aidants après le décès de leur proche ? La brève synthèse de littérature réalisée indique que les proches aidants ayant pu accompagner la fin de vie de leur proche autant qu’ils le souhaitaient sont moins à risque de développer des processus de deuil compliqués. Cependant, ces processus sont, pour chaque personne endeuillée, fondamentalement personnels et changeants et nécessitent donc une approche compréhensive et bienveillante.
Éthique et soin
Authors: Philippe Aloïse
Published: March 2023

Qu’est-ce que demander sinon faire avant tout acte de parole ? La parole a des effets et faire acte de parole est un mode d’énonciation qui vise un au-delà de l’énoncé. Dans cette phrase énoncée : « Je veux la mort », il s’agit d’entendre le « je » de la demande de mort qui est un « je » de l’énoncé et, de façon différente, le « je » de l’énonciation qui se fait entendre dans l’adresse faite. La demande de mort est un paradigme de la parole polyphonique qui ouvre à une alternative de réponses qui font la richesse de l’accompagnement en fin de vie.
Morphologie de l’athlète du docteur Thooris
Authors: Claverie Éric , Loudcher Jean-François , Krier Julien
Published: March 2023

L’article décline la trajectoire et l’œuvre de ce médecin français. Par ses écrits et expérimentations anthropotechniques, il étend une école française de morphologie au secteur sportif. Il s’implique ainsi à la Fédération française d’athlétisme. À cette occasion, il publie son ouvrage phare, La Vie par le Stade , somme dans laquelle il établit les critères d’une morphologie sportive efficiente. Plus encore, l’auteur idéalise un type morphologique supérieur : le Franc. De cette idéalisation tenant plus du fantasme que de la scientificité, il est possible de deviner une tendance eugéniste glissant progressivement vers une idéologie raciste plus ouvertement affirmée durant l’Occupation. Au final, les positions de Thooris apportent la preuve de l’existence d’une forme d’eugénisme dans le milieu sportif, secteur acceptant plus volontiers l’idée de sélection des individus.
Effect of astaxanthin isomer supplementation on their accumulation in edible orthopterans: migratory locusts and two-spotted crickets
Authors: Honda M. , Hirota K. , Zhang Y. , Hayashi Y. , Sugahara R.
Published: March 2023

The effects of an all-E-isomer-rich astaxanthin diet (E-AST-D) andZ-isomer-rich astaxanthin diet (Z-AST-D) supplementation on astaxanthin accumulation and isomer composition in the edible orthopterans, migratory locust (Locusta migratoria) and two-spotted cricket (Gryllus bimaculatus), were investigated.Z-Isomer-rich astaxanthin was prepared from the all-E-isomer via thermal treatment in corn oil at 160 °C for 30 min, increasing the totalZ-isomer ratio from 1.3 to 57.7%. Supplementation with E-AST-D and Z-AST-D toL. migratoria had little effects on astaxanthin concentration and isomer composition in the body. In contrast, astaxanthin supplementation toG. bimaculatus significantly improved the astaxanthin concentration, and when Z-AST-D was fed, the astaxanthin concentration was approximately eight times higher than that of supplementation with E-AST-D. This suggests thatL. migratoria exhibits very low astaxanthin isomer bioavailability, whereasG. bimaculatus can absorb astaxanthin isomers from its diet.L. migratoria may synthesise astaxanthin endogenously regardless of dietary astaxanthin content. TheZ-isomers were more bioavailable than the all-E-isomer inG. bimaculatus. Furthermore, astaxanthin isomer ratios in the faeces of both species were different from the dietary sources, suggesting that these ratios were modulated during digestion. These findings are important for increasing the added value of insect foods and for elucidating the mechanism of astaxanthin isomerisation in insects.
Contribution of a power multivector to distorting load identification
Authors: Menti Anthoula , Barkas Dimitrios , Pachos Pavlos , Psomopoulos Constantinos S.
Published: March 2023

The identification of harmonic generating loads and the assignation of responsibility for harmonic pollution is an important first step for harmonic control in modern power systems. In this paper, a previously introduced power multivector is examined as a possible tool for the identification of such loads. This representation of power is based on the mathematical framework of Geometric Algebra (GA). Components of the power multivector derived at the point of connection of a load are grouped into a single quantity, which is a bivector in GA and is characterized by a magnitude, direction and sense. The magnitude of this bivector can serve as an indicator of the distortion at the terminals of the load. Furthermore, in contrast to indices based solely on magnitude, such as components derived from any apparent power equation, the proposed bivectorial representation can differentiate between loads that enhance distortion and those with a mitigating effect. Its conservative nature permits an association between the distortion at specific load terminals and the common point of connection. When several loads connected along a distribution line are considered, then an evaluation of the impact of each one of these loads on the distortion at a specific point is possible. Simulation results confirm that information included in the proposed bivector can provide helpful guidance when quantities derived from apparent power equations deliver ambiguous results.
Flood spatial location in a Mediterranean coastal city: Ibiza (Balearic Islands) from 2000 to 2021
Authors: Rosselló-Geli Joan , Grimalt-Gelabert Miquel
Published: March 2023

Floods are a common occurrence in the Western Mediterranean basin, causing daily life disturbances, economic impacts and fatalities as the population living near the Mediterranean shores face a great risk. The city of Ibiza has been historically affected by floods of different magnitudes. After almost three decades without large events, with the 1977 flood being the latest, 20 floods have been identified within the city boundaries since the beginning of the 21st century, causing a great social impact. The aim of the research herein presented is to identify the locations of floods and their possible causes. The methodology is based on a comprehensive survey of newspapers articles and technical reports, thus allowing mapping of the location of the events over a city map. Among the causes, there are the lack of a runoff network and deficient infrastructure planning. Regarding the spatial distribution of floods, the most affected areas are the circumvallation freeways around the city and the neighborhoods urbanized after the 1960's. The results highlight the importance of the urban sprawl and malpractices related to flood risk areas, which increase the occurrence of floods. Moreover, the identification of the most affected areas can help city planners to create prevention measures and systems to reduce flood hazards and vulnerability.
Impact of online public opinion regarding the Japanese nuclear wastewater incident on stock market based on the SOR model
Authors: Hong Wei , Gu Yiting , Wu Linhai , Pu Xujin
Published: March 2023

The exposure of the Japanese nuclear wastewater incident has shaped online public opinion and has also caused a certain impact on stocks in aquaculture and feed industries. In order to explore the impact of network public opinion caused by public emergencies on relevant stocks, this paper uses the stimulus organism response(SOR) model to construct a framework model of the impact path of network public opinion on the financial stock market, and it uses emotional analysis, LDA and grounded theory methods to conduct empirical analysis. The study draws a new conclusion about the impact of online public opinion on the performance of relevant stocks in the context of the nuclear waste water incident in Japan. The positive change of media sentiment will lead to the decline of stock returns and the increase of volatility. The positive change of public sentiment will lead to the decline of stock returns in the current period and the increase of stock returns in the lag period. At the same time, we have proved that media attention, public opinion theme and prospect theory value have certain influences on stock performance in the context of the Japanese nuclear wastewater incident. The conclusion shows that after the public emergency, the government and investors need to pay attention to the changes of network public opinion caused by the event, so as to avoid the possible stock market risks.
COVID-19 disease identification network based on weakly supervised feature selection
Authors: Liu Jingyao , Feng Qinghe , Miao Yu , He Wei , Shi Weili , Jiang Zhengang
Published: March 2023

The coronavirus disease 2019 (COVID-19) outbreak has resulted in countless infections and deaths worldwide, posing increasing challenges for the health care system. The use of artificial intelligence to assist in diagnosis not only had a high accuracy rate but also saved time and effort in the sudden outbreak phase with the lack of doctors and medical equipment. This study aimed to propose a weakly supervised COVID-19 classification network (W-COVNet). This network was divided into three main modules: weakly supervised feature selection module (W-FS), deep learning bilinear feature fusion module (DBFF) and Grad-CAM++ based network visualization module (Grad-Ⅴ). The first module, W-FS, mainly removed redundant background features from computed tomography (CT) images, performed feature selection and retained core feature regions. The second module, DBFF, mainly used two symmetric networks to extract different features and thus obtain rich complementary features. The third module, Grad-Ⅴ, allowed the visualization of lesions in unlabeled images. A fivefold cross-validation experiment showed an average classification accuracy of 85.3%, and a comparison with seven advanced classification models showed that our proposed network had a better performance.
Fundo Social do Pré-Sal no Brasil: Marco Legal e Institucional, especificidades e desafios na promoção do Desenvolvimento Humano
Authors: Ismael Ricardo , Leone Rafael
Published: March 2023

A descoberta do Pré-Sal, em 2006, trouxe ao Brasil a esperança de um novo ciclo de desenvolvimento, combinando crescimento da economia com avanços no bem-estar social. O novo marco legal e institucional para exploração de petróleo e gás natural, aprovado pelo Congresso Nacional, definiu a criação do Fundo Social do Pré-Sal, que tinha os seguintes objetivos principais: estimular uma poupança de longo prazo; arrecadar recursos para o financiamento da educação e saúde, dois pilares do desenvolvimento humano; reduzir os impactos macroeconômicos gerados pela comercialização dos recursos naturais. O artigo pretende discutir a implantação do modelo brasileiro, entre 2012 e 2019, procurando analisar suas especificidades, cumprimento de seus propósitos e montante distribuído para as áreas sociais citadas. Quando comparado ao Fundo Soberano da Noruega, observa-se que a gestão do fundo no caso brasileiro é mais suscetível a interferências políticas, diante da ausência na legislação de mecanismos de transparência. A investigação mostrou que o Fundo Social do Pré-Sal arrecadou, no período considerado, um volume de recursos significativo, mas que não foi distribuído para o campo educacional, ou para o Sistema Único de Saúde, permanecendo depositado na Conta Única do Tesouro Nacional. Isto aconteceu porque o governo federal não criou as duas instituições gestoras previstas em lei: o Comitê de Gestão Financeira e o Conselho Deliberativo do Fundo Social. Conclui-se que esta questão deve ser enfrentada nos próximos anos, diante das projeções de aumento dos montantes envolvidos e das necessidades de financiamento da área social.
Considerações sociológicas sobre religião em Moçambique
Authors: Fernando Ilídio , Lanza Fabio , Patrocino Luis Gustavo
Published: March 2023

A sociedade moçambicana é fundamentada na diversidade religiosa a ponto de ser classificada como uma sociedade multirreligiosa. O presente artigo aborda a religião em Moçambique com o objetivo de apresentar panoramicamente os três períodos históricos da implantação das três religiões com maior contingente. Intenciona-se explicar aspectos relevantes do contexto sociorreligioso no processo da formação da nação e da sociedade moçambicana. São apresentados aspectos sociais referentes às três grandes matrizes religiosas vigentes no país: a religião cristã, a islâmica e a tradicional africana (RTA). Para tal, questiona-se como essas matrizes religiosas têm contribuído na formação dasociedade moçambicana. Trata-se, metodologicamente, de uma pesquisa bibliográfica e documental, utilizando análise processual e hermenêutica histórica juntamente com embasamento teórico da sociologia da religião, numa perspectiva analítica do conhecimento emancipatório. Como resultados pode-se afirmar que as religiões são fundamentais no que concerne à apuração dos alicerces ou gêneses religiosas que se destacam na formação cultural, humanização, socialização dos moçambicanos, meio de interação entre indivíduos e a sociedade e no desenvolvimento da religiosidade dos moçambicanos.
Das negociações com as facções à afirmação do monopólio da violência do Estado nas prisões: preços a serem pagos
Authors: Soria Batista Analía , Nascimento Francisco Elionardo de Melo , Barreira César
Published: March 2023

O artigo discute as relações entre o Estado e a sociedade, analisando a gestão das prisões no estado do Ceará. Essas relações são abordadas em perspectiva histórico-cultural, sociológica e política. Discute duas formas de gestão prisional que se sucedem no tempo: a negociação do monopólio da violência do Estado com as facções e a afirmação desse monopólio pelo enfrentamento a esses grupos. As práticas presentes nas modalidades de gestão são caudatárias de habitus de relacionamento entre o Estado e a sociedade produzidos pelo déficit histórico de cidadania. O texto está fundamentado na análise qualitativa dos dados adquiridos a partir de entrevistas e observação participante, análises bibliográfica, de vídeos, de matérias jornalísticas, de documentos e dados oficiais e não oficiais. A afirmação do monopólio da violência do Estado nas prisões é uma delicada operação política que inicia com estratégias intervencionistas de enfrentamento às facções criminais e de disciplinamento das prisões. E que continua com reformas como a burocratização do trabalho e o cumprimento de regulações oficiais e não oficiais. A política apresenta resultados controversos para os presos e para os policiais penais, como as denúncias de torturas dos presos e de adoecimento psíquico desses profissionais. De um outro lado, a negociação da gestão prisional entre o Estado e as facções fortalece a essas últimas e sela o destino no crime dos jovens negros e pobres.
Territórios integrados por grandes projetos de investimentos: reflexões a partir do sudeste e do norte do Brasil
Authors: Amorim Benevides-Guimarães Rosangela Maria , Do Socorro Silva Moreira Edma , De Sousa Ana Lúcia
Published: March 2023

Este artigo discute a correlação entre a integração territorial por meio de grandes projetos de investimentos (GPIs) em infraestrutura e a sua dominação e os impactos territoriais provocados aos povos indígenas, aos camponeses e pescadores locais nas regiões Sudeste e Norte do Brasil. Tem como propósito compreender, numa perspectiva dialética, o que denominamos de “processo de integração-desintegração territorial” associado ao Complexo Portuário do Açu, no Norte Fluminense e à Estrada de Ferro Carajás, na Amazônia. Para isso, nos baseamos nos estudos e nas pesquisas que envolvem as temáticas sobre a fragmentação territorial, os processos de desindustrialização e as commodities, além dos documentos técnicos referentes aos empreendimentos e das informações de campo (2019-2020). Nessas regiões, esses dois GPIs, com conexões globais, são responsáveis por deslocamentos humanos, pela exclusão de áreas para a agricultura e a pesca, pela expropriação de terras, pela violência e pela degradação ambiental, que ocorrem concomitantes com suas expansões físico-territoriais. As consequências desse processo acirram conflitos nesses territórios, dialeticamente integrados-desintegrados pelo capital e pelo Estado, e neles emergem resistências dos grupos sociais locais contra a usurpação de seus direitos sociais e contra a destruição da natureza e das culturas.
Projeto político pedagógico de uma escola paulistana periférica e a promoção de justiça social
Authors: Nunes Flávio , Da Silva Marcelino Jonathan
Published: March 2023

Este artigo teve como proposta dialogar com o Projeto Político Pedagógico de uma escola municipal de ensino fundamental da periferia da cidade de São Paulo. A intenção foi identificar traços de uma proposta educacional, que promova a superação das desigualdades, e colabore para promoção e fortalecimento de uma conjuntura de justiça curricular/social. Um estudo documental, de natureza qualitativa, que se apropria da noção de justiça sistematizada no pensamento da filósofa Nancy Fraser e do sociólogo Boaventura Santos e a confronta com o documento institucional. Consideramos que, enquanto carta de intenção, ao demonstrar vontade de fissurar a monocultura e combater a imposição de um modo universal de constituir a vida, o PPP da unidade em tela tem potencial para fazer emergir práticas pedagógicas em prol das diferenças.
Tendências & Desafios dos estudos em Educação para a Paz no Brasil
Authors: Costa Santos André Felipe , Prado de Sousa Clarilza , Serrano Oswald Serena Erendira
Published: March 2023

Objetivou-se analisar as tendências e os desafios dos estudos brasileiros a respeito da ‘Educação para a Paz’ (EPP) elaborados por investigadores vinculados a grupos de pesquisas registrados e certificados no Diretório de Grupos de Pesquisa do Conselho Nacional de Desenvolvimento Científico e Tecnológico; ademais, foi inventariado quais desses estudos, articulavam-se com a Teoria das Representações Sociais (TRS) – de S. Moscovici. Dos 117 artigos elaborados entre 2008-2018 por esses pesquisadores, destacam-se como tendências: o predomínio de estudos teóricos (70,7%), sobre investigações de cunho empírico (29,2%); registram-se como as disciplinas com maior produção de investigações em EPP no Brasil, a Educação Física e Relações Internacionais; não foram localizadas pesquisas em EPP articuladas com a TRS. Erguem-se como desafios: desenvolver pesquisas em EPP, conforme as especificidades da área de conhecimento da Educação; serem elaboradas investigações em EPP articuladas com a TRS.
A Organização das Nações Unidas: um reflexão pacifista
Authors: Santos Lopes Nuno
Published: March 2023

O presente texto pretende refletir sobre a Organização das Nações Unidas do ponto de vista pacifista, recorrendo principalmente a um dos seus objetivos fundamentais: manutenção da paz e da segurança internacionais. Procura-se, igualmente, reforçar o importante papel do multilateralismo no sistema internacional contemporâneo, bem como o contributo da ONU para essa dinâmica. Através de uma análise qualitativa, recorre-se a fontes primárias e bibliografia crítica para explorar o carácter pacifista, e multilateral, da maior organização internacional alguma vez fundada. Conclui-se que, não obstante os desafios colocados pelo contexto international atual, em particular devido às decisões de alguns Estados-membros em relação à cooperação internacional, a ONU tem conseguido fazer vingar os seus desígnios.
What Can Data Tell Us?
Authors: Torres Kelly M. , Statti Aubrey
Published: March 2023

Researchers have found that student engagement has an impact on student learning, retention, motivation, and persistence in higher education. However, faculty often experience challenges in maintaining high levels of student engagement in their classes. Data collected in class during activities, through learner generated reports, and at various points in students' academic careers can provide valuable insight into student engagement. This datum can be used to enhance instructional approaches and curricula to improve student academic gains and interest. Further, universities can use student engagement data to better support vulnerable student populations and improve institutional effectiveness. Because student engagement can have a profound effect on student engagement, this literature review highlights how universities can collect and analyze data to provide targeted instructional practices to augment student performance.
GIS for Sustainable Urban Transformation in Countries With Emerging Economies
Authors: Fernandez Trinidad , Schroeder Stella
Published: March 2023

In South America, the urban population has been growing rapidly over the last century, with a share of more than 80% expected by 2020. This trend has created new challenges for city planning because municipalities must address issues caused by horizontal urban expansion and the informal occupation of peripheral areas. Frequently, the latter are not designed or equipped for the basic needs of new inhabitants. This research is based on the work of MGI, an initiative for smart, sustainable development in Piura, an intermediate city with one of the highest rates of urban sprawl in Peru. This initiative promotes climate change adaptation and mitigation based on urban analysis embodied in a sustainability profile and an action-oriented roadmap with concrete, feasible, and replicable measures and projects. One such measure is a spatial analysis, prioritising small illegal dumpsites for recovery and converting these areas into a public space using digital planning tools. This study analyses the development of the intervention to be implemented against the city´s opportunities and challenges.
News Reporting in Drone Internet of Things Digital Journalism
Authors: Nwanakwaugwu Andrew Chinonso , Matthew Ugochukwu O. , Okey Ogobuchi Daniel , Kazaure Jazuli Sanusi , Nwamouh Ubochi Chibueze
Published: March 2023

The current study investigated several innovations for drone technology adoption in journalistic expeditions for intelligence and news gathering purposes. The necessity to leverage technologies to improve the direct involvement of eyewitnesses especially in violence-prone areas where physical and direct human involvement would be impossible or with high risk of survivability expectations is the motivating factor that directed the current research. The paper surveys the adoption of autonomous sensing drone systems in internet of things journalism and amalgamated the theoretic ingredients from the academic standpoint with realistic technological advancements from the global perspective and eventually expanded the propositions for conceivable adoption in the credible societal applications. The paper envisioned the future journalism and mass media practices and how drone innovation can revolutionize the journalism profession for the purpose of news and intelligence gathering with practical and technical realism with reduction of journalistic casualties.
Structure and Spesific Absorption Rate Identification of Mn0.25Fe2.75O4/NiCo2O4 Magnetic Nanocomposites
Authors: Ardiyanti Aprilia Dewi , Sunaryono Sunaryono , Choerullah Andy , Wisodo Hari , Mufti Nandang , Taufiq Ahmad
Published: March 2023

Magnetic nanoparticles are a potential material that can be used in a few fields of nanotechnology such as absorbent, catalyst, energy, storage, biomedical, and cancer treatment. Every nanoparticle has different properties, so they will appear unique when two magnetic materials were composited into one unit. Mn0.25Fe2.75O4/NiCo2O4 nanocomposites were successfully synthesized by using simple coprecipitation and sonication methods. To determine the nanostructure and Specificesific Absorption Rate (SAR) value of sample, Mn0.25Fe2.75O4/NiCo2O4 nanocomposites were successfully characterized by using XRD, SEM, and Magneto-thermal instrument, respectively. Based on the data analysis, the XRD profile of Mn0.25Fe2.75O4/NiCo2O4 combining from two phase of Mn0.25Fe2.75O4 and NiCo2O4. By using the Debye Scherer equation, the particle size of Mn0.25Fe2.75O4/NiCo2O4 nanocomposites is about 10.64 nm and presentage of crystallinity is 67.66%. SEM characterization shows that there is agglomeration in the nanocomposites due to the large surface energy between the particles. Properties of superparamagnetic was observed by using VSM, saturation magnetization 17.79 emu/gr and coercivity about 0,15 T. Furthermore, SAR value of Mn0.25Fe2.75O4/NiCo2O4 nanocomposite revealed the optimum value with 0.343 Watt every gram.
Sensitivity Analysis of Gas Tungsten Arc Welding Process Variables for Angular Distortion in Chromium Manganese Stainless Steel Using Design Thinking Approach
Authors: Sudhakaran R. , Sivasakthivel P.S. , Eazhil K.M. , Narayanan S. , Balamurali B.
Published: March 2023

An approach to problem solving that is solution-based is provided by the design methodology known as Design Thinking (DT). To address complicated problems, the five stages of design thinking can be applied. This research article focuses on using the DT method, which includes empathising, defining, and coming up with ideas, to produce high-quality weld joints. The selection of welding process parameters plays a vital role in determining the quality of weld. The weld should be free from weld defects to ensure good performance. One of the major defects that affect the weld quality is angular distortion. During welding the rapid heating and cooling of the work piece results in uneven expansion and contraction in all directions. This results in the work piece getting distorted. It becomes imperative to predict distortion in the work piece so that it can be reduced by providing initial angular distortion in the negative direction. Through empathy, it has been found that the welding process parameters such as welding current (I), welding gun angle (θ), shielding gas flow rate (Q), plate length (L), and welding speed (V), significantly contribute to angular distortion of the weld joint. From the ideation process the following suggestions were arrived to predict angular distortion and identify the factor that has significant effect on angular distortion. A statistical prediction model was developed correlating the welding process parameters with angular distortion. Central Composite Rotatable Design with five factor and five levels was used to develop mathematical models. The experiments were conducted on Chromium Manganese Stainless Steel Grade AISI 202 in GTAW process. Optimization of process parameters was done using Simulated Annealing algorithm. From the sensitivity analysis it was found that the lower values of welding current, welding gun angle and higher values of welding speed, shielding gas flow rate and plate length resulted in minimum angular distortion.
Microstructure Evolution and Fracture Toughness Behaviour of Cryorolled LM6 Al Alloy
Authors: Singh Aakash Kumar , Joshi Amit , Ravi Ravi Kant , Pant Pawan Kumar , Pathak Manoj Kumar , Yogesha K.K.
Published: March 2023

In the present work, the effect of cryo-rolling on the processed LM6 alloy samples has been studied. The solution treated (ST) sample of LM6 alloy has been processed through cryo-rolling with reduction of its thickness with values such as 30%, 40%, and 75%. One of the key material properties i.e., fracture toughness has been studied and equivalent energy fracture toughness ( ) is being evaluated according to the ASTM E 992 standard. The microstructure evolution after processing through cryorolling (CR) has been carried out with the help of optical microscopy and Scanning Electron Microscopy (SEM). Then, the calculated values of fracture toughness parameter i.e., equivalent energy fracture toughness ( is being correlated with the microstructure evolution after processing of LM6 alloy. It was found out that there is an improvement in equivalent energy fracture toughness ( ) as the reduction values increases. The 75% CR sample showed great increment of 67% as compared to ST alloy sample. The microstructure evolution also signifies the mix-mode fracture visualized through Scanning Electron Microscopy (SEM) and as the reduction values increase, the ductile fracture zone dominance increases on brittle fracture zone indicating there is improvement in fracture toughness of the ultra-fined grain LM6 alloy due to the grain refinement, dislocation strengthening and grain boundary strengthening.
Weld Repair Technique for Petroleum Product Pipeline in Extreme Conditions of Prolonged Thermal Cycling
Authors: Karatseyeu Artur , Lupachou Aliaksandr , Parshin Sergey G.
Published: March 2023

The paper presents the results of experimental research on the development of a repair technique for a pipeline transporting hydrogen mixed with petroleum vapors, which has been in operation for 25 years at Mozyr Oil Refinery, the largest oil enterprise of the Republic of Belarus. The failure of this pipeline was caused by a crack formed in the weld root and its propagation along the fusion line of the heterogeneous weld joint. The developed technique made it possible to prevent further crack propagation without interrupting the refinery fractionation column operation. Welding of the main weld should be performed on a previously deposited damping layer. The damping layer must be deposited by using welding materials, the welding method and the technique that lead to creating a nonoriented dendritic structure. For this purpose, a welding material that has an energy of crack initiation and propagation greater than the energy of crack propagation in the base metal must be used. The composition of the weld must include chemical elements that inhibit the intensity of diffusion processes and increase the strength of the interatomic forces of the austenitic matrix at the pipeline operating temperature.
Influences Stacking of Basalt-Glass Fabrics Reinforced Epoxy Matrix Hybrid Composites towards Tension Loads
Authors: Subagia I.D.G. Agy , Sutantra N. , Kim Yon Jig
Published: March 2023

This work focused to investigates the effect of basalt and E-glass fabrics in stacking sequences mode of hybrid composites under tensile loads. The sample has fabricated in a hybrid approach in stacking layers of the basalt and E-glass fabrics with a ratio of 60%:40% through the vacuum injection molding (VIM) process. A tensile test to initiate mechanical properties had conducted. And a scanning electron microscope (SEM) is used for damage analysis. The testing result shows that hybridization basalt with E-glass fabrics has been tension strength increased average of 3.95%. The dominant failures occurred as fiber pull out and delamination. Conclusions show that stacking sequences of basalt and E-glass fabrics is a potential design to maintenance composites structures. However, it was not caused sufficiently by tension loads.
Experimental Study of Sound Absorption Coefficient Characteristics of Oil Palm Frond Reinforced Composite
Authors: Khem Samrith , Sutikno  , Suwarta Putu , Istana Budi
Published: March 2023

This study aims to investigate the capability of sound absorption coefficient (SAC) of oil palm frond (OPF) composite. Also, to characterize the fiber surface without treatment and with alkali treatment. Two parameters were formulated to characterize the SAC ability of the OPF composite: chemical treatment and density of composite. The composite was manufactured from a waste OPF as a reinforcement and urea-formaldehyde (UF) resin as a matrix. The fibers were blended with UF 10% (weight fraction) and formed by hot-pressing under the pressure of 9 tons at 140°C for 5mn. The SAC was measured by the impedance tube respected with ASTM 1050 (the transfer function method) within the frequency of 125-6400 Hz. Morphological analysis is investigated by scanning electron microscopy (SEM) on untreated and alkali-treated OPF fiber. The measurement data were obtained and compared with different densities and treatments. It reveals that the SAC of OPF composite was proportion to density and alkali-treated. The SAC worsens as the composite becomes dense due to the greater density. The treated fibers have more roughness and friction area than untreated fiber; thereby, the incidence of sound energy rapidly dissipates to thermal energy, causing improved SAC performance
Experimental Study on the Heat Transfer Performance of Nanofluid MnFe2O4 - Ethylene Glycol/Water on Double-Pipe Heat Exchanger
Authors: Permanasari Avita Ayu , Rusli Muhammad Hilmi , Puspitasari Poppy , Sukarni Sukarni , Zaine S.N. Azella , Wahyunengsih Wahyunengsih
Published: March 2023

The heat exchanger is an example of heat transfer applications in industries that commonly found in cooling systems and powerplants. The heat exchangers utilise water, oil, and ethylene glycol (EG) as heat transfer fluids which possess a deficiency in heat transfer characteristics. Nanofluid are expected to improve the heat characteristics of the fluid used in heat exchangers. This research used MnFe2O4 nanoparticles with a volume fraction of 0.05% into the base fluid. The base fluid is a mixture of EG-water with a concentration of 20; 40; 60; and 80%. This study aims to understand the heat transfer characteristics of the MnFe2O4-EG/water nanofluid. The experiments were carried out on a double-pipe heat exchanger with variations flow rate 0.2; 0.4; and 0.6 l/min. This study is expected to show the best performance of MnFe2O4-EG/water nanofluid.
Synthesis and Characterization of ZnFe2O4- PEG/RGO Nanocomposites as Lead Heavy Metal Adsorbents
Authors: Febrianti Nur Safitri , Taufiq Ahmad , Hidayat Arif , Mufti Nandang , Subadra ST. Ulfawanti Intan
Published: March 2023

Lead waste that pollutes the environment can cause a variety of serious diseases. Various efforts have been made to remove lead waste from the environment, one of which is through the development of magnetic nanoparticles-based adsorbents. In this work, the synthesis of ZnFe2O4-PEG/RGO nanocomposites was carried out through co-precipitation and sonochemical methods. The structure, morphology, function groups, and adsorption performance of the ZnFe2O4-PEG/RGO nanocomposites were characterized using XRD, SEM, FTIR, and AAS. X-ray diffraction pattern showed the formation of a single phase ZnFe2O4 with a cubic spinel structure. The RGO peak was not detected because the RGO mass was much smaller inside the ZnFe2O4-PEG/RGO nanocomposites. Furthermore, refinement analysis through Rietica software obtained crystallite size of ZnFe2O4-PEG/RGO were 9.6 nm. The SEM result showed that the morphology of ZnFe2O4-PEG tends to be spherically distributed on RGO. Based on FTIR results, the functional groups of ZnFe2O4-PEG/RGO nanocomposites showed the presence of Zn-O and Fe-O bonds at 529 cm-1 and 428 cm-1. Meanwhile, C-O bonds at wavenumbers 1222 cm-1 showed typical absorption of RGO. Despite Fe-O and C-O bonds, the presence of C-O-C bonds at wavenumbers of 1031 cm-1 indicates the characteristics of PEG that successfully coats ZnFe2O4 nanoparticles. Interestingly, the AAS results showed that ZnFe2O4-PEG/RGO nanocomposites had an excellent performance as lead adsorbents, evidenced by the percentage of adsorption up to 97,7%.
Developing the Methodology of Failure Probability for the Rolling Equipment Units and Elements
Authors: Belyaev Sergey Yu. , Fedulov Artem A. , Surkov Ivan A. , Raskatov Evgeny Yu. , Bulganina Marina Yu.
Published: March 2023

The safety of basic parts of the rolling equipment is most at risk due to the complex geometrical shape and significant levels of nominal stresses. With a significant mass of such parts and a long production time, the replacement process is accompanied by the need to dismantle the old mill and install a new one. Currently, there are no specialized methods for assessing the risks of failures in relation to the rolling equipment, therefore, it is required to develop new methodological provisions and adapt the existing general methods of risk assessment to real production conditions. Based on the fundamentals of the regulatory document, a methodology for assessing the risks of failures in relation to the rolling equipment has been developed. The roughing stand of the “2000” hot rolling mill for titanium alloy sheet production was chosen as a practical object for assessing the risks of failure. The preliminary analysis of the dangers and their consequences had shown that for most of the elements of the working stand, which perceive the rolling force, as well as for the units and parts of the main drive loaded with the rolling torque, there are dangers that can lead to disruption of the deadlines for fulfilling orders for rolled products. For a numerical assessment of these risks, special calculations were performed.
Powder Metallurgy Methods in Technologies for Producing Titanium Orthopedic and Dental Implants
Authors: Ilyushchanka Aliaksandr , Savich Vadim V. , Taraikovich Aliaksandr , Golodok Robert
Published: March 2023

Today, the ability to form porous structures and coatings from titanium powder on implants parts of specified porosity, size and morphology of pores into which newly formed bone tissues and, thus, they contribute to the osseointegration and high and long-term stability of the implant functioning in the body is widely used. The ability to obtain work pieces of complex geometry by powder metallurgy methods with a minimum of mechanical rework by cutting, it also promotes the diffusion of this technology in the implants manufacturing as the titanium alloys are classified as difficult to process. The future progress in the development of new materials and types of implants is directly related to powder metallurgy - there is information about the creation of a highly solid biocompatible composite based on the intermetallic system β-Ti3Au, from which rib replacement implants are made
Dielectrics and Optical Properties of Green-Synthesized Fe3O4 Nanoparticles
Authors: Sitorus Friska Suryani , Tumbelaka Rivaldo Marsel , Istiqomah Nurul Imani , Nuswantari Aulia , Suharyadi Edi
Published: March 2023

The magnetite (Fe3O4) nanoparticles have been green-synthesized using Moringa Oleifera extract (MO) with variations of 5, 10, 15, and 20 ml. The X-ray diffraction results confirmed that the microstructure of Fe3O4 nanoparticles is a cubic inverse spinel structure with an average particle size of 5.0-8.9 nm and lattice parameters in the range of 8.14-8.22 Å. The results of UV-VIS data presented that the absorption edges of Fe3O4 MO 5 ml were 193.4 nm and the band gap energy of Fe3O4-MO is in the range of 2.62-3.31 eV. Dielectric properties were measured using impedance spectroscopy in the frequency range of 10-900 kHz. The results of measurement were in the form of real dielectric (ε'), imaginary dielectric (ε''), and tangent loss (tan δ). The dielectric constant decreased with increasing frequency due to interfacial polarization. In addition, MO affected the dielectric properties of Fe3O4 nanoparticles. The dielectrics of green-synthesized Fe3O4 with various MO of 5, 10, 15, and 20 ml at a frequency of 10 kHz are 248.5, 276.9, 289.0, and 308.1, respectively. The results measurement of the dielectric properties showed the optimality of the green synthesized sample with MO concentrations of 10 and 15 ml with values ​​of 276.9 and 289.0 at a frequency of 10 kHz. So, green synthesis Fe3O4 magnetite nanoparticles are used for Surface Plasmon Resonance (SPR) and Electromagnetic Interference (EMI) Shielding because these two applications are dependent on frequency and dielectric constant.
The Influence of Microstructure Quality on the Efficiency of Bucket Teeth of Career Excavators
Authors: Galata Lyudmila A. , Ermakov Boris S. , Kancev Roman G. , Karzina Julija S.
Published: March 2023

The mining industry is the main base of the country's industrial potential, a significant part of which is the development and production of various rocks and minerals. The main type of machines used in open pit mining are powerful excavators, who make up the bulk of the equipment fleet of mining enterprises. Operating enterprises incur large losses due to wear and destruction of excavator bucket teeth, therefore, improving the quality of the tooth material is an urgent task. This article discusses the influence of the casting quality, including the cast structure of the material, on the performance of the excavator teeth. The object of research was the teeth of the buckets of Cat-391 and VOLVO-350 mining excavators made of 30Cr2Si2MnMo steel after long-term operation. The actual condition of the bucket teeth of mining excavators after operation was examined and microstructure, hardness and worn surfaces of the teeth was analyzed. The study showed that the efficiency of excavator bucket teeth is determined by the level of unevenness of the microstructure and microhardness and the presence of defects, hot and cold cracks. It has been established that the main reason for the accelerated failure of the teeth of open-pit excavator buckets is the superposition of various microstructural defects connected with unevenness of the metal microstructure and imperfection of the casting process. Main directions of increasing efficiency of mining excavators’ teeth bucket were identified.
Impact of Humanitarian Crises on Diabetes Care in Iraq and Syria—IDF-MENA Region
Authors: Odhaib Samih Abed , Mansour Abbas Ali , Khalifa Suha Falah , Shegem Nadima , Thannon Wael , Saad Michele Abi , Abdulrazaq Hazim , Belkhadir Jamal , Sandid Mohamad , Masood Shabeen Naz
Published: March 2023

This short review tried to discuss the factors that affect diabetes care during humanitarian crises after the political and military conflicts in post-2003 Iraq and post-2011 Syria. The pattern of the devastating effect of the conflicts on the suboptimal healthcare system and infrastructure is quite similar. Both countries’ long-term and continuous geopolitical instability and security concerns were barriers to applying any disaster preparedness plans. They had markedly exhausted diabetes care in these countries with similar mixed public and private healthcare systems. The influx of huge numbers of refugees with chronic diseases, especially diabetes, in the neighboring host countries created pressure on the healthcare systems. It urged some changes in the national policies with the needed help from the aid organizations to an extent. The internal displacement problem for huge nationals in their country exhausted the already exhausted healthcare facilities, with more burdens on the effective equal provision of diabetes-related medication and management tools. Still, diabetes care is not included as a vital part of the mitigation plans during crises in both countries, with the main concern the communicable rather than non-communicable diseases. Type 1 diabetes mellitus received less care during the crisis in both countries, with the insulin shortage being their major concern. The availability and affordability of diabetes medications in camp and non-camp settings were suboptimal and unsatisfactory. More active planning is needed to build a well-prepared healthcare system with diabetes care as an integral part.
Assessment of Footwear among Patients with Diabetes Mellitus
Authors: John Anulekha Mary , Charley Jessilin K. , Joy Jibily
Published: March 2023

Background:

Diabetic peripheral neuropathy, a well-known complication of diabetes mellitus, leads to insensate foot, prone for ulceration. Inappropriate footwear and walking barefoot increases this risk in a neuropathic foot. A diabetic foot ulcer can be very costly, affecting the quality of life adversely and also result in amputation. A well-fitting, good footwear plays an important role in preventing injury and ulceration. In this study, we aimed to assess the footwear of patients with diabetes.

Materials and Methods:

This study was conducted during May 2019. Alternate patients among 230 patients were selected, and 112 patients with type 2 diabetes were included. Every patient was educated regarding all aspects of diabetes. Feet of each patient were examined. Biothesiometry, monofilament, and footwear assessments were performed.

Results:

Among 112 patients enrolled, 69 (61.6%) were males and 43 (38.3%) females. Mean age was 60.2 ± 11.7 years, and age ranged from 21 to 83 years. Duration of diabetes ranged from less than a year to 45 years. Of the total patients, 73 (65.17%) had significant diabetic peripheral neuropathy when assessed objectively, using biothesiometry and 10 g Semmes–Weinstein monofilament. Only 10 (8.9%) patients had footwear made of microcellular rubber. Only 15 (13.3%) wore a footwear with backstrap. Among those with neuropathy, only 4 (3.5%) had microcellular rubber (MCR) footwear with a backstrap. Optimal toe box was seen in 98 (87.5%) patients as most patients wore open footwear. Most of our patients wore footwear that was too hard, with shore value on durometry ranging from 60 to 75. Only 5 (4.46%) patients had desirable soft insole.

Conclusion:

No patient had an optimal footwear that fulfilled all criteria required for a foot with diabetic peripheral neuropathy. Hence, in addition to screening for neuropathy and regular checking of feet, it is also important to look at patient's footwear and make necessary amendments periodically.
Clusters and Components of Metabolic Syndrome (MeS) as a Predictor for Fatty Liver
Authors: Bhargav Varanasi Yugandar , Jain Mayank , Alen Tom , Kedarisetty Chandan Kumar , Arthur Preetam , Karthikeyan Mu , Selvan Thamarai S. , Venkataraman Jayanthi
Published: March 2023

Aim:

Metabolic syndrome (MeS) refers to metabolic risk factors with different phenotype combinations. The study aim was to determine the clusters of MeS components by age and gender as predictors for the presence of fatty liver (FL).

Materials and Methods:

The cohort consisted of 990 subjects, undergoing executive health check between January 2019 and February 2020. Baseline data, anthropometric parameters, and ultrasound findings were noted. Patients with normal ultrasound were categorized as group 1 and those with FL as group 2. MeS is defined and clustered and risk of predicting FL was analyzed in age and gender.

Results:

Of the 990 subjects, 689 (69.6%) had FL (group 2); 554 patients (56%) were >45 years. Females had significant grade 1 (P < 0.05) and grade 2 (P < 0.01) FL, ≥45 years, and MeS of three or more components in FL, both above (P < 0.01) and below (P < 0.03) 45 years of age. Waist circumference (WC), diabetes mellitus (DM) with hypertension, triglyceride, and high-density lipoprotein (cluster 3) were statistically significant in males, both <45 and >45 years of age (P < 0.001); in females, the same cluster was statistically significant only for >45 years (P <0.001).

Conclusion:

Females ≥45 years had significant FL. MeS of three or more components was seen in both above and below 45 years in females with FL when compared with males. The highest risk clusters were the ones that included WC and WC + DM, indicating that the clusters associated with WC alone or in combination with DM had the highest risk for FL when compared with the other MeS combinations.