bluuebunny/crossref_metadata_2025 huggingface dataset:
Modeling of processes occurred during heating and ignition of coal particles in methane-air mixture in the area of fire
Authors:   Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine, Minieiev Serhii , Demchenko Sehii ,   Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine
Published: January 2023

The study of combustion processes at high temperatures is associated with two main problems. The first of them is to determine composition and amount of possible combustion products, and to clarify thermodynamic properties of the mixture under various combustion conditions. The second problem is to determine amount of heat released during combustion and maximum attainable temperature of combustion or work which can be obtained if to apply the established simplifications and under the conditions in which combustion occurs. Great importance is given to predicting temperature indicators in the fire site when performing work in mine conditions on extinguishing and assessing the development of fires in mines. These indicators are important for the actual assessment of the state of the environment in the focus of its extinguishing, since they are control indicators for determining the cooling of the rocks of the massif and, ultimately, indirectly assess the fact of an extinct fire. In the article, the authors present a method for calculating parameters of the process of solid fuel combustion, which is based on the results of theoretical and experimental studies in the field of the theory of combustion of dusty fuel. By this method, the following parameters of combustion process are calculated: theoretical air consumption required for combustion of a unit of fuel quantity; volume of combustion products; composition of combustion products; enthalpy of combustion products at required temperatures and excess air; and calorimetric and theoretical temperatures of solid fuel combustion. By using the known dependences, the forecast of the temperature in the fire zone is substantiated for further development of new and improvement of existing methods. Some proposals developed for improving the estimates of the parameters of the state of the rock massif in the process of extinguishing a fire are considered. It is proposed, for example, as preventive measures, while determining indicator gases and evaluating their dynamics, to take additionally samples of coal before a fire and gradually heat them in laboratory conditions in muffle furnaces until the coal ignites, whereupon to evaluate their dynamics according to a laboratory experiment; then, when a fire occurs, it is possible to determine its real state by the dynamics of changes in the factually measured indicator gases. This proposal is not normative and requires further development, industrial verification and discussion. Keywords: coal particles, temperature forecast, area of fire, heat exchange, air, atmospheric composition.
Common Ukrainian-Moldovan Places of Memory in the Cultural Landscape of the Orhei Codres of the Republic of Moldova
Authors:   M. Rylskyi Institute of Art Studies, Folkloristics and Ethnology, Bosa Liubov , Holovko Oleksandr ,   M. Rylskyi Institute of Art Studies, Folkloristics and Ethnology
Published: January 2023

The article is based on the materials of an expeditionary journey in 2019 to Orhei district of the Republic of Moldova. The importance of local traditions formed in the conditions of Ukrainian-Moldovan intercultural coexistence and included into modern arsenal of cultural memory of both Moldovans and Ukrainians is emphasized. Especial significance of the cultural landscape of the territory as the collective memory retransmitter in this is noted. Owing to the analysis of the interconnections between the local community and the natural conditions of its residence, it has become possible to determine the features of folk housing, economic practices, rituals, etc. The formative importance of the former estate of the landowner K. Balioz in Ivancha village (Ivancea) in the mental construction of the local landscape is shown. At the same time, such structure is influenced significantly by the location of the settlement in the area of the Old Orhei (Orheiul Vechi), a unique natural and cultural zone, which is considered as an iconic place of Moldova. Numerous commemorative practices of Ukrainians, namely the creation of public organizations, the activities of local folk group, search for the up-to-date forms of self‑presentation, are important components of life of the Ivancha villagers. Besides, it is also an essential aspect of the development of ethnic self‑consciousness of the entire Ukrainian community of Moldova in general in the conditions of conscious harmonious intercultural coexistence and common places of memory.
A mentalizáció, a reziliencia és a problémaviselkedés kapcsolati beágyazottsága serdülőkorban: vizsgálatok a Reflektív Funkció Kérdőív (RFQ-H) magyar változatával
Authors: Szél Erzsébet , Szabó Éva
Published: January 2023

Háttér és célkitűzések

A mentalizáció kulcsfontosságú a szociokognitív képességek integrációjához és fejlett interperszonális készségek kialakításához. Hagelquist (2017) pedagógiai és pszichoterápiás modelljében a sikeres mentalizációt építőkövek hierarchikus rendszerébe helyezte. Célunk a Reflektív Funkció Kérdőív megbízhatóságának vizsgálata és a mentalizáció hagelquisti modelljének igazolása egészséges serdülő mintán. Jelen kutatásban azt vizsgáltuk, hogy az észlelt társas támogatás és a mentalizáció színvonala milyen kapcsolatot mutat a rezilienciával és a problémaviselkedés kialakulásával.

Módszer

A vizsgálatban 444 serdülő vett részt (M = 16,3 év, SD = 1,15 év), akik a Reflektív Funkció Kérdőív mellett kitöltötték a Serdülő Reziliencia Kérdőív magyar változatát, a Képességek és Nehézségek Kérdőívet, valamint a Multidimenzionális Társas Támogatás Kérdőívet. Az adatok elemzéséhez klaszteranalízist végeztünk a mentalizáció és az észlelt társas támogatás dimenzióinak bevonásával.

Eredmények

Az észlelt problémaviselkedés gyenge, illetve közepes erősségű kapcsolatban áll a mentalizáció sérülésével, a mentalizáció dimenziói közül a bizonytalan mentalizációval és az érzelmi elárasztottság skálájával, azaz az egyén csökkent képessége arra, hogy saját szándékait értelmezze, pozitív együtt járást mutat a problémaviselkedés kialakulásával. A mentalizáció és az észlelt társas támogatás dimenzióinak bevonásával három klasztert alakítottunk ki. A kiegyensúlyozott csoportba tartozó egyének szignifikánsan kevesebb problémaviselkedést jeleztek, és magasabb szintű rezilienciáról számoltak be. A magárahagyottak csoportja a reziliencia és a problémaviselkedés területén is a legerősebb sérüléseket jelzi, míg az érzelemvezérelt csoport esetén a problémaviselkedés emelkedett mértéke jellemző.

Következtetések

A mentalizáció kapcsolati beágyazottsága befolyásolja a reziliencia színvonalát és a problémaviselkedés kialakulásának esélyét, ezzel igazolódott Hagelquist modelljének azon része, amely a sikeres mentalizáció egyik feltételének a környezeti-kapcsolati biztonságot jelöli ki.
Silk fibroin molecularly imprinted nanoparticles as biocompatible molecular nanotraps: Molecular recognition ties the knot with biomaterials. The bioMIP’s labeling and degradation
Authors: Maniglio Devid , Agostinacchio Francesca , Bossi Alessandra Maria
Published: January 2023

Molecularly imprinted nanoparticles (nanoMIPs) are biomimetic polymeric nanomaterials, typically prepared from acrylamide and derivatives, that are formed by a template-assisted synthesis. NanoMIPs display high affinity, selectivity, and specificity for the targeted molecule, on the par of natural receptors and antibodies. Recently, we introduced a paradigmatic change by forming nanoMIPs starting from biomaterials, under the name of bioMIPs, as a strategy to promptly translate them into the clinical settings. Silk fibroin, that is a biocompatible and non-immunogenic natural material, was used as a building block for the synthesis of bioMIPs tailored to recognize the protein human serum albumin. BioMIPs confirmed high selectivity and specificity for the targeted protein, together with cytocompatibility. The present work expands the actual knowledge on bioMIPs, studying a route to post-synthetically entail fluorescent tags, with the aim to localize these molecular nanotraps in cells and tissues. Moreover, the enzymatic degradation of bioMIPs was investigated, to support the role of bioMIPs as greener and biocompatible alternatives to non-natural biomimetics.

Graphical abstract
The Role of COVID-19 in Antibiotic Resistance in Pediatric Population
Authors: Kuznetsov Kirill O. , Tukbaeva Laysan R. , Kazakova Valeriya V. , Mirzoeva Kamilla R. , Bogomolova Ekaterina A. , Salakhutdinova Adelina I. , Ponomareva Darya Yu. , Garipova Aigul R. , Mutsolgova Marina S.-M. , Galimkhanov Arslan G. , Sakhibgareev Marsel I. , Guzhvieva Elina R.
Published: January 2023

There is data on the irrational use of antimicrobial drugs in pediatric population during the COVID-19 pandemic. This could lead to potential development of antibiotic resistance and increased morbidity and mortality among this vulnerable population group. The aim of this review is to study the role of COVID-19 in antimicrobial drugs administration and antibiotic resistance development, as well as to determine a set of measures for its prevention. Recent studies results have shown that COVID-19 pandemic had both direct and indirect impact on antibiotic resistance development in pediatric population. The COVID-19 outbreak has revealed weaknesses in health systems around the world. Antibiotics administration in patients with coronavirus infection during this period exceeded the number of cases with bacterial co-infection or other diseases. Thus, it indicates irrational antibiotic treatment. There were cases of inappropriate antibiotics administration during the crisis caused by the COVID-19 pandemic even in regions with long-term rational antibiotic treatment programs. One of the most viable methods to combat antibiotic resistance is to improve approaches in health care and to increase preparedness to infectious outbreaks. Increasing clinical competence of medical workers, accessibility of medical facilities, permanent supply of high-quality and cheap antibiotics, vaccines, reducing COVID-19 testing time, and adequate administration of antibacterial agents are the measures that can prevent diseases caused by drug resistance. All stakeholders (health authorities, regulating authorities, politicians, scientific community, pharmaceutical companies) have to collaborate and achieve results to implement all the mentioned above protection measures.
Regional Experience in Improving the Quality and Cost-Effectiveness of Medical Care for Children with Acute Respiratory Pathology in the Rostov Region
Authors: Besedina Elena A. , Piskunova Svetlana G. , Badyan Alexandra S. , Dudnikova Eleonora V. , Barkovskaya Galina Yu.
Published: January 2023

One of the priorities of the modern world medical community is the continuous comprehensive improvement of medical care quality. Evaluation of medical care quality and material costs level for the management of patients with acute respiratory pathology (ARP) was performed in one city medical facility, as well as cost-effectiveness analysis of the project “Improvement of medical care quality for children of the Rostov region”. The first step of this study was retrospective audit of source medical records (n = 154) of Children’s hospital via the adapted World Health Organization questionnaire “Evaluation of in-patient care quality for children” recommended for Europe and revised in 2015. Inclusion criteria: hospitalization of patients with acute conditions; outcome — recovery with no complications; presence of one of the clinical manifestations (acute nasopharyngitis, acute non-obstructive bronchitis, acute obstructive bronchitis, acute obstructive laryngitis, acute community-acquired pneumonia). The cost-effectiveness evaluation was performed considering the direct treatment costs and the coefficient of economic costs per patient (CECPP). Analysis of the study’s first stage has revealed defects in medical care quality, significant and irrational material costs of the medical facility at all stages of medical and diagnostic care for children with ARP. CECPP peak indicators came under notice in all observation groups due to high expenses on medications and specifically those not included in clinical practice guidelines, vast amount of unreasonable hospitalizations and diagnostic procedures, expenses on physical therapy (PT), etc. Analysis of the study’s second stage medical records (n = 146) of patients with ARP took place after the initial audit followed by quarterly monitoring and hospital staff training (endpoint — 12 months). Significant improvements in the health care quality and cost-effectiveness for children with ARP have been shown.
IMPROVEMENT OF THE ROUTE NETWORK OF THE CITY OF MARHANETS
Authors: KUDRIASHOV A. , MAZURENKO A. , KOMAR V. , HAIDUK T.
Published: January 2023

Purpose. Carry out the formation of a new route and transport network in the city of Marganets and a comparative assessment of the routes of the existing and proposed route and transport network. Methodology. The design of a rational route transport network was carried out using methods of combinatorial analysis, graph theory was used to develop a topological scheme of routes, the search and final selection of "candidate" routes was performed on the basis of analytical methods. Findings. The formation of the outgoing route transport network of Marganets was completed; precinct routes were checked for compliance with the maximum permissible traffic interval; the search for "candidate" routes satisfying the condition of not exceeding the maximum allowable interval was performed; a rational route transport network of the city of Marganets was developed using the method of directed selection; determined the time spent by passengers traveling on the route network; a comparative evaluation of the effectiveness of existing and developed routes was performed. Originality. The research carried out on the process of transporting passengers on the transport network of the city of Marganets allowed to improve the passenger route network to improve the quality of transport services for the city’s population. Practical value. The practical significance of the work is that the implementation of the developed rational passenger route network will improve the quality of transport services for the population of Marganets, reduce the time spent by passengers on the approach to the bus stops and improve the quality of passenger service.
OUTSOURCING OF TRANSPORT AND FORWARDING COMPANIES FOR EXECUTION OF PLANNED VOLUMES OF TRANSPORTATION
Authors: PAPAKHOV O. , LOGVINOVA N. , HUDIMOV V. , MAKSYMENKOV Y.
Published: January 2023

The purpose of this work is to understand the transport and logistics scheme of cargo delivery with minimal transportation costs and the direct process of providing cargo transportation services on the most attractive terms for all participants in this process and effective use of vehicles. Transport forwarding activity is a component of transport outsourcing. The paper considers the general characteristics of PL levels of logistics and the given characteristics of each of them and the differences between them. The description of transport documentation, which is used when using different types of transport for intrastate and interstate transportation of goods, is given. Recommendations for choosing a service transport and forwarding company are provided. The practical significance of the article lies in the use of the specified requirements by the enterprise to make the optimal choice of the transport and forwarding company for joint work on the delivery of goods to customers.
ANALYSIS OF EXISTING METHODS FOR CALCULATING THE POSITION OF BOUNDARY COLUMNS
Authors: KOZACHENKO D. , BOZHKO M. , BEREZOVYI M. , MALASHKIN V.
Published: January 2023

The purpose of the research is to improve the methods of calculating the position of limit posts on the railways of Ukraine. To achieve the established goal, a comprehensive analysis of the existing methods of determining the position of boundary posts was performed, taking into account the multivariate design features of the railway track connection and compliance with traffic safety requirements. Methodology. In the process of research, methods of analysis and synthesis were used to study the content and basic provisions of existing methods for determining the position of limit posts on railways; methods of analytical geometry to describe the position of the limit column relative to adjacent tracks, taking into account the geometric parameters of the rolling stock. The results. As a result of the conducted research, the following conclusions were obtained. The basis of the current methods of determining the position of the limit posts are the requirements for the parameters of the calculation car, which is not operated on the railways of Ukraine, however, the recalculation of the position of the boundary columns on the existing tracks of the main and industrial railway transport using the characteristics of the car that will replace the existing calculation car is currently impractical and irrelevant Taking into account the multivariate constructions of the connection of railway tracks, there is no universal analytical solution for determining the position of the limit column. New approaches to determining the distribution of the overall distance when calculating the position of the limit posts in the conditions of automated design have inaccuracies, and also do not take into account the variety of structural features of the connection of railway tracks. The results of the performed analysis are the basis for continuing research on improving the methods of calculating the position of limit posts on the railways of Ukraine. Scientific novelty. The obtained results make it possible to summarize the scientific basis for the imperfection of the existing methods of calculating the position of the limit posts on the railways of Ukraine. Practical significance. From a practical point of view, the results of the analysis create conditions for further research on the improvement of the above methods. The result of the research should be the development of a universal method of theoretically accurate calculation of the position of the limit post or other objects on railway tracks for any design of track development. The use of this method in design practice is possible by developing a software product for determining the position of the boundary column, including on tracks with a width of 1435 mm, for cases where tracks with a width of 1435 and 1520 mm are combined on the same ground surface and under the condition of using calculated wagons with any parameters.
Trajetórias profissionais de jovens professoras e professores
Authors: Zan Dirce , Souza Aparecida Neri de
Published: January 2023

Resumo Este artigo foi elaborado a partir de pesquisa realizada em 2015 com jovens professoras e professores do ensino médio de escolas públicas e privadas da cidade de Campinas (SP). Com o objetivo de compreender a trajetória formativa desses sujeitos e suas experiências de trabalho, foram entrevistados 12 professores com idade entre 20 e 29 anos. Identificamos que a opção pelo magistério é vista por esse grupo como uma possibilidade de contribuir para mudanças sociais, enquanto produtores de cultura, e como uma escolha profissional viável diante de sua situação social e econômica. As condições em que os professores trabalham colocam em evidência diferentes fatores quanto ao conteúdo e significado do trabalho docente, bem como sobre a decisão de permanecer no magistério.
Trajetórias de trabalho: empregos precários e inserções provisórias
Authors: Silva José Humberto da
Published: January 2023

Resumo Os trânsitos juvenis são significativos para pesquisar as reconfigurações que tomam corpo no mundo contemporâneo, em suas diversas esferas sociais. A juventude é o contingente social mais diretamente exposto aos dilemas de nossa sociedade, e hoje são expressivas as taxas de desemprego entre os jovens no país. Além das barreiras para ingressar e se manter em um primeiro emprego, são ainda maiores as dificuldades encontradas para permanecer em um emprego digno e protegido. Os dados também evidenciam que a informalidade se apresenta mais elevada nesse grupo quando comparado ao grupo dos adultos. Já em condição de emprego formal, é notória a presença dos jovens em ocupações de maior rotatividade e inserções provisórias. Nesse sentido, com o objetivo de desvelar os percursos laborais construídos por parte da juventude trabalhadora brasileira, este trabalho pretende, por meio de singulares trajetórias e triangulando conjuntamente com bases de dados nacionais, analisar duas formas de inserção no trabalho: o primeiro emprego por meio da lei da aprendizagem e o emprego no setor de telemarketing. Os percursos juvenis analisados contribuíram para que as formas flexíveis de emprego constituam uma porta de acesso ao exercício de uma atividade remunerada. Todavia, a grande transformação que se verifica nos últimos anos reside no fato de que tanto os empregos precários como as novas formas de subemprego – aprendizes e os operadores de telemarketing – assumem cada vez menos uma ponte para a estabilidade empregatícia. Para muitos jovens, esse tipo de trabalho deixou de ser um acontecimento biográfico pontual, passando a um modo de vida.
Prontidão para via oral, aleitamento materno e diabetes mellitus gestacional: estudo caso-controle
Authors: Gomes Maria Teresa Bezerra , Yamamoto Raquel Coube de Carvalho , Oliveira Taísa Ribeiro de Souza
Published: January 2023

RESUMO Objetivo verificar a prontidão para via oral e aleitamento materno em recém-nascidos de mães diagnosticadas com diabetes mellitus gestacional (DMG). Métodos estudo observacional, analítico, quantitativo, do tipo caso-controle. Para avaliação da sucção não nutritiva, foi utilizado o Protocolo de Prontidão do Prematuro para Início da Alimentação por Via Oral - POFRAS e, para avaliação do desempenho em seio materno, o Protocolo de Acompanhamento Fonoaudiológico - Aleitamento Materno. A amostra foi estratificada em dois grupos, sendo o grupo experimental composto por recém-nascidos de mães diagnosticadas com DMG e o grupo-controle, por recém-nascidos de mães hígidas. Para a análise estatística, foram utilizados os testes Mann-Whitney, Shapiro Wilk e t de Student. Resultados a amostra total foi composta por 46 recém-nascidos, sendo 21 do grupo experimental e 25 do grupo-controle. Observou-se p<0,05 na comparação entre os grupos nas seguintes variáveis: oscilação do estado de consciência, hipotonia global, reflexo de procura débil, menos de cinco sucções por pausa na avaliação da sucção não nutritiva, pega em seio, adormecimento após iniciar sucção e posicionamento mãe-bebê. Conclusão recém-nascidos de mães diagnosticadas com DMG apresentaram maior dificuldade na prontidão para via oral e na prática do aleitamento materno nas primeiras 72 horas de vida, comparados aos filhos de mães hígidas.
A prática de terapeutas ocupacionais com mães acompanhantes em enfermarias pediátricas
Authors: Souza Lucas Ramon Santos de , Joaquim Regina Helena Vitale Torkomian
Published: January 2023

Resumo Introdução Terapeutas ocupacionais têm consolidado sua assistência nos contextos hospitalares atuando em diversos setores dessas instituições com populações diversas. A enfermaria pediátrica é um dos cenários de atuação desses profissionais, que prestam seus serviços às crianças e adolescentes hospitalizados, assim como as suas acompanhantes, as mães. Objetivos Apresentar a intervenção de terapeutas ocupacionais com mães acompanhantes em enfermaria pediátrica e a percepção desses profissionais sobre sua contribuição nesse contexto. Método Trata-se de estudo descritivo, exploratório, de abordagem qualitativa. Participaram 14 terapeutas ocupacionais que atuavam com mães acompanhantes em enfermaria pediátrica. Os dados foram coletados por meio de questionário autoaplicável contendo 39 questões disponibilizado via Google Forms®, codificados com auxílio do software ATLAS.ti® (versão 8) e analisados por análise de conteúdo na modalidade temática. Resultados Os dados apontam que as terapeutas ocupacionais avaliam as dificuldades e necessidades das mães acompanhantes durante a internação dos seus filhos, traçam objetivos que englobam a mulher ou a díade e percebem as contribuições decorrentes da sua prática. Os dados apontam ainda modelos, técnicas, recursos e referenciais teóricos utilizados pelos profissionais nas intervenções com as mães acompanhantes, além dos locais disponibilizados pelas instituições para essa prática. Conclusão Terapeutas ocupacionais auxiliam de forma integral as mães acompanhantes durante a internação dos seus filhos. Os resultados ilustram o processo de intervenção da terapia ocupacional com esse público, perpassando pela avaliação, intervenção e resultados observados pelos profissionais.
Intervention of occupational therapists with accompanying mothers in hospital pediatric wards
Authors: Souza Lucas Ramon Santos de , Joaquim Regina Helena Vitale Torkomian
Published: January 2023

Abstract Introduction Occupational therapists have consolidated their assistance in hospital settings through their work in various sectors of these institutions with diverse populations. The pediatric ward is one of the scenarios where these professionals act, providing services to hospitalized children and adolescents, as well as to their companions: their mothers. Objective To present the intervention of occupational therapists with accompanying mothers in pediatric wards and these professionals’ perception of the mothers’ contribution in this context. Method This is a descriptive, exploratory, qualitative study. 14 occupational therapists working with accompanying mothers in pediatric wards participated in this study. The data were collected through a self-administered questionnaire containing 39 questions available via Google Forms®, coded using the ATLAS.ti® 8.0 software, and analyzed by Content Analysis in its thematic modality. Results The data showed that occupational therapists assess the difficulties and needs of accompanying mothers during the hospitalization of their children, set goals that encompass the woman or the dyad, and perceive the contributions arising from their practice. The data also pointed out the models, techniques, resources, and theoretical frameworks used by these professionals in their interventions with the accompanying mothers, as well as the places made available by these institutions for this practice. Conclusion Occupational therapists fully help accompanying mothers during the hospitalization of their children. The results illustrate the occupational therapy intervention process with this population, from the evaluation, intervention, to the results observed by the professionals.
Occupational engagement: some assumptions to inform occupational therapy
Authors: Cruz Daniel Cezar da , Taff Steven , Davis Jane
Published: January 2023

Abstract Occupational engagement has been conflated with other concepts, such as participation, active occupational performance, and therapeutic engagement. This critical review will discuss occupational engagement as a unique concept that describes a form of involvement in doing that does not require performance and foregrounds the subjective-affective and cognitive experiences of doing. We present some attributes of occupational engagement and the implications for the lack of clarity of this concept within the literature. The difference between occupational engagement and therapeutic engagement is discussed by comparing the foundational tenets of the Model of Human Occupation (MOHO) and the Canadian Model of Occupational Performance and Engagement (CMOP-E). Through one illustrative narrative, we discuss how occupational engagement can be understood as a phenomenon that is not performance-dependent and has different levels of engagement. To conclude, we point out some assumptions about occupational engagement that can inform occupational therapy research and practice.
Solidarity, militancy and mental health in times of pandemic
Authors: Torrenté Mônica de Oliveira Nunes de , Marques Tiago Pires , Torrenté Maurice de
Published: January 2023

Based on digital network narratives, we analyzed various forms of solidarity actions negotiated by users of the mental health care network to deal with the problems arising from the Covid-19 pandemic in a context of ultra-neoliberal economy. If, on the one hand, the increase in psychosocial suffering was evident, on the other hand, the coping strategies organized by those people were astounding, many of them being developed and managed by themselves. Among these strategies, there is the activation and creation of social networks for specific purposes depending on the problem to be solved. Prioritizing the notion of “gift,” these strategies updated the illusio of militancy of the users involved in them. However, the physical distance between the network members and the organization of dialogue in a virtual space make difficult the interaction dynamics in favor of the establishment of interpersonal bonds and conflict resolution.
FORMATION OF WEAR-RESISTANT ANODIC OXIDE FILMS ON SILICON ALUMINUM ALLOY FOR ELECTRICAL AND ELECTRONIC MATERIALS
Authors: Nmadu Daniel , Stepanova-Parshuto Elena , Uma Uma U. , Eli-Chukwu Ngozi C. , Parshuto Alexander A. , Smyaglikov Igor P. , Ogah Ogah E. , Eheduru Marcellinus I. , Ezichi Samuel I. , Mba-Ogbonna Callista N.
Published: January 2023

The composition of electrolytes for the formation of wear-resistant oxide layers on the silicon aluminum alloy by the method of high-voltage electrochemical oxidation is developed. Obtained anodic oxide films possess a thickness of up to 100 μm and a hardness of up to 5.5 GPa. The frictional behavior of oxide films in different counter-body-substrate friction pairs under conditions of dry friction was investigated. It was established that the use of the "oxide coating-oxide coating" pair in the dry friction regime shows the highest wear resistance in comparison with friction pairs of bare alloys.
Peri-Implant Tissue Health and Disease in the Pre- and Post-Loading Phases
Authors: Kadkhodazadeh Mahdi , Amid Reza
Published: January 2023

Considering the widespread use of dental implants, a precise definition for peri-implant tissue health and an appropriate classification for peri-implant diseases are imperative for researchers and dental clinicians. However, absence of a unanimous definition and an efficient classification system has created controversies in the published reports regarding the epidemiology and prevalence of peri-implant diseases. Moreover, lack of a standard system for differentiation of different grades of peri-implantitis further complicates the interpretation of reports regarding the diagnosis prevalence, treatment, and outcome of such conditions, and highlights the need for a classification system based on the severity of disease. Almost all of the currently available classification systems focus on the assessment of health or disease status of the tissues around loaded implants. The purpose of the present study is to propose a classification/scoring system for peri-implant tissue health before and after prosthetic loading. This grading system can aid the researchers and dental clinicians in assessment of peri-implant tissue condition both before and after prosthetic loading of dental implants.
Synthesis of iron oxide nanoparticles, characterization, uses as nanozyme and future prospects
Authors: Tanvir Fouzia , Sardar Nimra , Yaqub Atif , Ditta Sarwar Allah
Published: January 2023

Iron oxide nanoparticles (IONPs) have recently attracted wider attention because of their unique properties, such as superparamagnetism, larger surface area, surface-to-volume ratio and simple manufacturing process. Several chemical, physical and biological techniques have been employed to synthesize nanoparticles (NPs) with acceptable surface chemistry. This paper summarizes the approaches for producing IONPs, managing their shape and size and tailoring their properties for bioengineering, pharmaceutical and modern applications. Iron oxides have significant potential in biology, climate change mitigation and horticulture, among several fields. Surface coatings with organic or inorganic particles are one of a kind. The surface coatings of IONPs are critical to their performance because they prevent NP aggregation, reduce the risk of immunogenicity and limit non-specific cellular uptake. Chitosan is a biodegradable polymer that is applied on IONPs to coat them. Chitosan derivatives such as O-(2-hydroxyl)propyl-3-trimethyl ammonium chitosan chloride (O-HTCC; an ammonium quaternary chitosan derivative) have a long-lasting positive charge that allows them to work in different pH ranges, allowing them to interact with cell layers at physiological pH. By reacting epoxypropyltrimethylammonium chloride with chitosan, the hydro-solvent HTCC is formed. For hyperthermic treatment of patients, NPs can also be coordinated to an organ, tissue or tumor through an external attractive field. Given the increasing interest in iron NPs, the purpose of this review is to present data on IONPs, particularly chitosan-capped iron NPs, for different biomedical fields.
Toma de decisión estadística
Authors:   Universidad Cooperativa de Colombia, Daza Garzón Claudia Liliana
Published: January 2023

La finalidad del presente material, de tipo académico, es concienciar y exhortar, a cualquier futuro profesional o a los que ya se encuentran en el ejercicio de su profesión, a ser objetivos en momentos de toma de decisión en un entorno cotidiano, laboral, científico o de índole profesional. Esta nota de clase se encuentra distribuida en tres partes: 1) conceptos generales de tipo estadístico y terminología específica sobre pruebas de hipótesis, 2) procedimiento de pruebas de hipótesis mediante el cálculo del estadístico de prueba y 3) desarrollo de situaciones que implican dicho proceso. Es de anotar que cada una de las partes por tratar se hará de forma sencilla y práctica y se restringirá al máximo la formalidad de los modelos de índole probabilístico y estadístico que se pudieran necesitar; únicamente nos dedicaremos a su uso de acuerdo con la necesidad de lo que se pretenda analizar. En la primera parte, la de los conceptos generales, se establece como una especie de glosario de términos, tanto estadísticos como específicos, sobre las pruebas de hipótesis, con el objeto de que cuando se llegue a la etapa del procedimiento, únicamente se nombren. En la segunda parte, se presenta el paso a paso, de índole universal, del procedimiento de pruebas de hipótesis, específicamente para muestras grandes o varianza poblacional conocida, mediante el cálculo del estadístico de prueba. Y en la última parte, se ejemplificará el procedimiento en dos escenarios específicos: uno cotidiano (o “casero”) y otro de índole académico, extraído de la interpretación, de tipo estadístico, de los resultados de las pruebas Saber Pro del 2021, donde se puede recrear fácilmente un escenario de toma de decisión estadística. Finalmente, el alcance de esta nota de clase es proporcionar el proceso de medición estadística para generar objetividad ante la presencia de una toma de decisiones que se pudiera presentar en cualquier momento y desde cualquier escenario.
Pautas para un plan estratégico en una empresa del sector de servicios
Authors:   Universidad Cooperativa de Colombia, García Tamayo José Arbey , López Sandra Yaninna
Published: January 2023

La realización de este estudio de caso en referencia a una compañía del sector de servicios permite analizar diferentes situaciones problemáticas desde el punto de vista administrativo, las cuales tienen a su vez efectos en todas las áreas de la organización, particularmente en la contable y financiera. Se cuenta con la particularidad de que algunas empresas pequeñas presentan escenarios donde no están diseñadas ni establecidas las funciones de cada uno de los empleados, teniendo como consecuencia el no progreso de las directrices para el desarrollo de sus planes estratégicos para la misma organización en un determinado lapso de tiempo (corto, mediano y largo plazo). Surge entonces la importancia de tener una planeación adecuada en cada uno de los procesos administrativos que permita la orientación del rumbo de la organización. Entre estos procesos, se deben plantear y diseñar objetivos que permitan visualizar el horizonte que genere el direccionamiento basado tanto en la misión como la visión del ente económico. En síntesis, el desarrollo adecuado de un plan estratégico no solo permite trabajar todos hacia un mismo objetivo, sino que se genera la calidad de los servicios prestados, además de que se genera la capacidad de innovación, el desarrollo de la creatividad, un excelente liderazgo, una muy buena comunicación, entre otros. Estos argumentos permiten al estudiante (o lector interesado) analizar e interpretar situaciones problemáticas, así como desarrollar una postura crítica en la identificación de soluciones y la toma de decisiones.
Multistage Gold Mineralization at The Wanagon Gold Prospect, Ertsberg District, Mimika Regency, Papua Province, Indonesia
Authors: Hartiningsih Endang , Syafrizal Syafrizal , Sucipta IGB Eddy , Notosiswoyo Sudarto
Published: January 2023

DOI:10.17014/ijog.9.3.279-290The Wanagon Gold prospect area located in the Ertsberg District, Papua Province, the eastern part of Indonesia, is predominantly underlain by Upper Mesozoic to Cenozoic sedimentary rocks intruded by the Wanagon Sill monzodiorite-diorite and andesite intrusion (Wanagon Dike). The study by previous researchers at Wanagon Gold prospect was based on pre-2005 exploration data and did not contain extensive additional drillings in 2007-2011. This paper aims to elucidate the genesis of the Wanagon Gold deposits based on the latest exploration data. The mineralogy was determined by using thin section and polish section analyses, a scanning electron microscope with an energy dispersive spectrometer (SEM-EDS), X-ray diffraction (XRD), and Near-Infrared spectroscopy (NIR). The chemical composition of the rock was identified using an X-ray fluorescence spectrometer (XRF). Gold mineralization is associated with pyrite, of which there are three types of gold-bearing pyrite: (1) massive pyrite, (2) disseminated pyrite, and (3) fine-grained pyrite associated with clay minerals. Only massive pyrite contains visible gold-bearing minerals such as native gold, electrum, and gold-telluride minerals, while in nonmassive pyrite, gold is only detected by the assay. The deposit is interpreted as structurally controlled distal gold skarn. Instead, its local association of gold with arsenic also indicates a minor component of more-distal sediment-hosted type gold mineralization.
Geochemical Characterization of Coal, Carbonaceous Shale, and Marine Shale As Source Rock in West Sulawesi, Indonesia
Authors: Sutadiwiria Yarra , Burhannudinnur Muhammad , Jambak Moehammad Ali , Riyandhani Cahyaningratri Prima , Yeftamikha Yeftamikha
Published: January 2023

DOI:10.17014/ijog.9.3.303-314The eastern part of the Makassar Strait has not achieved significant success in the petroleum exploration stage. In general, exploration wells in this area have not found hydrocarbons to date. Most of the problems experienced by these wells are geochemical-related, including the absence of a source rock where the hydrocarbon is formed, immature source rock, and low volume of hydrocarbon. Therefore, this study aims to find potential Eocene source rock in West Sulawesi. It commenced by determining the paleofacies followed by the geochemical analysis of well cutting and surface samples. The geochemical analyses conducted are total organic carbon (TOC), rock eval pyrolysis (REP), kerogen type, vitrinite reflectance (VR), and gas chromatography/mass spectrometry (GC/MS). The samples that have a potential as an Eocene source rock were coal, as well as carbonaceous and marine shale. Based on the plotting of relative abundance for sterane (C27 - C29), the coal and carbonaceous shale had the input from terrestrial organic material with a contribution from marine, while marine shale had the input from marine organic material and contribution from terrestrial. Furthermore, coal and carbonaceous shale had a relatively high proportion of C29 sterane compared to C27 and C28, while marine shale had a relatively high proportion of C27 compared to C28 and C29. The higher plants also contributed to the organic matter in carbonaceous shale and coal samples, as indicated by the abundance of oleanane/C 30 hopane and the other significant content of resin biomarker. In accordance with the objectives of the study, it was found that during the Eocene, the type of source rock in the eastern side of the province varied, starting with coal and carbonaceous shale in the upper intertidal-fluviodeltaic environment, and marine shale sediments from the source facies of marine algal.
Optimal Tide Gauge Location for Tsunami Validation in The Lembeh Island, North Sulawesi
Authors: Sriyanto Sesar Prabu Dwi , Angmalisang Ping Astony , Manu Lusia
Published: January 2023

DOI:10.17014/ijog.9.3.315-327The tsunami early warning system in Bitung does not work optimally, because there is no buoy as a marine equipment for tsunami validation before reaching the coastal area. The lack of buoy can be replaced by placing a tide gauge on the east coast of Lembeh Island. To determine the optimal tide gauge location, the simple additive weighting (SAW) method was used with three criteria. Those three criteria are the potential of tsunami detection, sufficient evacuation time, and an appropriate site for tide gauge installation. Numerical tsunami modeling is used to calculate the first two criteria. The third criterion is a limiting factor, because the tide gauge can only be installed on the dock. Therefore, there were only five candidate locations on the east coast of Lembeh, namely Dorbolang, Pancuran, Posokan, Motto, and Lirang. The result, Posokan is the best location for tide gauge placement with a total score of 2.884. Based on the simulation, an additional tide gauge in Posokan can detect tsunami at the average of 11.4 minutes earlier than use only the tide gauge currently available at Bitung port. It means that people on the coast of Bitung have more evacuation time before the tsunami hits the coastal area
Model Framework for Analysis and Visualization of Climate Disaster Patterns
Authors: Pratiwi Dian
Published: January 2023

DOI:10.17014/ijog.9.3.329-336Extreme climate change has almost begun to show symptoms just about in all countries, including Indonesia. At the beginning of 2020, some parts of Indonesia were flooded due to high rainfall intensity. In fact, in DKI Jakarta area the potential for flooding often arrive early. For this reason, an appropriate disaster pattern analysis system needs to be developed and implemented to prevent the incident from recurring by planning better handling. The model framework that was built to create a visualization system for disaster patterns in this study consisted of five stages, namely the image processing stage in the map image, the placement of the coordinates of the affected area, interpolation with the B-Spline method, extrapolation with the Von-Neumann law, and the accurate evaluation of the formed disaster pattern mapping. Through this model framework, it is expected to produce a system design for informative disaster pattern mapping.
Who Pays For Your Rewards? Redistribution in the Credit Card Market
Authors: Presbitero Andrea , Wix Carlo , Agarwal Sumit , Silva André F.
Published: January 2023

We study credit card rewards as an ideal laboratory to quantify redistribution between consumers in retail financial markets. Comparing cards with and without rewards, we find that, regardless of income, sophisticated individuals profit from reward credit cards at the expense of naive consumers. To probe the underlying mechanisms, we exploit bank-initiated account limit increases at the card level and show that reward cards induce more spending, leaving naive consumers with higher unpaid balances. Naive consumers also follow a sub-optimal balance-matching heuristic when repaying their credit cards, incurring higher costs. Banks incentivize the use of reward cards by offering lower interest rates than on comparable cards without rewards. We estimate an aggregate annual redistribution of $15 billion from less to more educated, poorer to richer, and high to low minority areas, widening existing disparities.
Recession Signals and Business Cycle Dynamics: Tying the Pieces Together
Authors: Kiley Michael T.
Published: January 2023

Examining a parsimonious, yet comprehensive, set of recession signals yields three lessons. First, signals from financial markets, leading indicators of activity, and gauges of the macroeconomic environment are each useful at different horizons, with leading indicators and financial signals informative at short horizons and the state of the business cycle at medium horizons. Second, approaches emphasizing the yield curve overstate the recession signal from the term spread if other factors are not considered; given correlations among indicators, these differences are often small, but were large in 2022. Finally, simulations of a reduced-form vector autoregression of unemployment and financial conditions, which captures the time-series properties of the series well, suggest the patterns are consistent with a typical hump-shape characterization of business cycle dynamics; this synthesis tightens the connections of the recession prediction literature with the business-cycle literature.
Automatic Deposition of CHCA Matrix for MALDI Analysis of Lipids v1
Authors: Neumann Elizabeth
Published: January 2023

Scope: To describe the procedure for spraying tissue sections with CHCA for lipids. CHCA is used as a safer matrix to ship coated slides to collaborators. Expected Outcome: Slides should be coated with CHCA. Tissue sections should be imaged within 24 hours of matrix application.
Evaluation of miniaturized Illumina DNA preparation protocols for SARS-CoV-2 whole genome sequencing protocol v1
Authors: Pillay Sureshnee
Published: January 2023

This protocol describes the miniaturisation of the Illumina DNA Prep library kit and the use of a rapid modified protocol with fewer clean-up steps and different reagent volumes (full volume, half volume, one-tenth volume). The cost of sequencing can be reduced roughly sevenfold, and the time required to prepare the library can be reduced from 6.5 hours to 3 hours. The protocol adaptation represents a lower-cost, streamlined approach for SARS-CoV-2 sequencing, which can be used to generate genomic data quickly and affordably, particularly in resource-constrained settings.
Literature Review and Experiment: Diversity of Bacteria in Forest, Revegetated Post-Mining Land, and Active Tin Mining with A Metagenomic Approach
Authors: Sari Eka , Nugroho Andhika Puspito , Retnaningrum Endah , Prijambada Irfan Dwidya
Published: January 2023

The objective of this study was to investigate the diversity of bacteria in the rhizosphere of Acacia grow in the forest and different ages of revegetated land and non-rhizospheric bacteria from active tin mining soil on Bangka Island with a metagenomic approach and to investigate its relationship with physicochemical properties of the soil and its metal content. 17 species/genera were found in the four fields, and Bradyrhizobium is the dominant genus. Bacterial communities of the forest (more than 5 years in revegetated post-tin mining land containing C, N, P, and Fe) are Paraburkholderia sp., Bacillus sp., Candidatus-Xiphinematobacter, and Bacterium enrichment. The physicochemical properties of soil from less than 5 years of revegetated contain Cu, Cr, and Mo, and the dominant species in this soil were Bulkhorderia sp., Bacillus lehensis, B. fordii, B. thermolactis, Chloroflexi bacterium, and Thermonosporaceae bacterium. The physicochemical properties of soil from the mining were dominated by Cd and Ni, and the dominant species in this soil were Sinomonas atrocyanea.