Improving Preventive Maintenance Management in an Energy Solutions Company

30th International Conference on Flexible Automation and Intelligent Manufacturing (FAIM2021)In industry, production processes and assets are constantly evolving, Thus, continually improving and updating them is essential to their sustainability. This work intended to apply a set of methods and philosophies to improve the Preventive Maintenance Management process in a case study company dedicated to the development, production and maintenance of power and distribution transformers. Thus, a Action – Research methodology was used. After identifying the main problems, a mixed maintenance strategy based on Reliability Centered Maintenance (RCM) and Total Productive Maintenance (TPM) was applied. The following achievements were obtained by this work: (a) method of grading equipment critically based on its importance to the production process was developed and implemented;(b) a new flowchart of decisions and actions was developed for Preventive Maintenance Plan Management; (c) a reduction of the waste time in Preventive Maintenance (PM) was obtained; (d) the implementation of Autonomous Maintenance (AM) resulted in a reduction of 66% in equipment failures; (e) a set of new Key Performance Indicators (KPI´s) were introduced; (f) maintenance plans compliance rates increased by 12%. At the end of the work a reduction of € 120 060 could be achieved. Thus, the main contribution of this work was to show that bringing to the action different tool together in an organized way and share the information and responsibilities with the workers can result in important savings to the company, becoming the maintenance function more effective.info:eu-repo/semantics/publishedVersio

De lá para cá: classe, raça e gênero em narrativas autobiográficas de antropólogas em memoriais acadêmicos (USP/UNICAMP, 2004-2014)

Nas universidades brasileiras, os memoriais acadêmicos são documentos que apresentam uma autorreflexão sobre a trajetória intelectual e profissional de um docente, caracterizando uma das raras manifestações de escrita autobiográfica a respeito de intelectuais e de pesquisadores de diferentes áreas, formações e pertencimentos. Este artigo apresenta reflexões sobre a percepção de classe, raça e gênero, a partir de relatos autobiográficos dos memoriais de titularidade de antropólogas da Universidade de São Paulo (USP) e da Universidade de Campinas (UNICAMP), aprovadas em concursos entre 2004 e 2014. Para o docente, este é um momento que representa a ascensão ao topo da carreira. No entanto, a universidade é uma instituição na qual as mulheres ainda lutam para superar preconceitos, por isso tais narrativas autorreflexivas estãoinseridas em certas estruturas e tradições do campo intelectual-acadêmico e mostram-se como um rico material para a compreensão da trajetória e do papel feminino neste espaço, enquanto um exercício de autoetnografia

Cyperaceae e Juncaceae no Parque Estadual de Ibitipoca, Minas Gerais, Brasil

O Parque Estadual de Ibitipoca (PEIB), localizado no sudeste do estado de Minas Gerais (21º40'-21º44'S, 43º52'-43º55'W) abriga em sua área grandes extensões de campos rupestres entremeado por porções de florestas. Foram encontradas no Parque um total de 23 espécies distribuídas em nove gêneros de Cyperaceae e uma espécie de Juncaceae. Os táxons observados ocorrem em áreas abertas com solos arenosos a rochosos e áreas sazonalmente alagadas, além do sub-bosque das florestas. Lagenocarpus rigidus é a espécie mais comum na área do Parque, formando touceiras densas em áreas de campo rupestre com solo arenoso úmido. Bulbostylis carajana e B. distichoides são registrados pela primeira vez para a Região Sudeste do Brasil, reforçando a necessidade de estudos de floras locais para o melhor entendimento da distribuição das espécies.The Parque Estadual de Ibitipoca (PEIB) is located in the southeast of Minas Gerais (21º40'-21º44'S, 43º52'-43º55'W) and comprises an expanse of campos rupestres penetrated by some forested areas. A total of 23 species distributed in nine genera of Cyperaceae and one species of Juncaceae were found in the park. The taxa observed occur in open areas with sandy to rocky soils and in seasonally flooded areas in addition to the forest understory. Lagenocarpus rigidus is the most common species within the park, forming dense clusters in areas of campo rupestre with moist, sandy soil. Bulbostylis carajana and B. distichoides are registered for the first time in the Southeast of Brazil, reinforcing the need for local floristic studies to better understand species distribution

The impact of a health promotion program on toddlers' socio-emotional development: a cluster randomized study

BACKGROUND: The first 3 years of life are a critical period for the development of socio-emotional skills, highlighting the importance of socio-emotional development in early childhood. This study aimed to evaluate the effectiveness of a health promotion intervention program on the socio-emotional development of children aged 12 to 42 months during the COVID-19 pandemic. METHODS: A total of 344 children from 15 childcare centers participated in this study, with six centers in the intervention group and nine in the control group. Childcare teachers in the intervention group received a 6-month training program aimed at promoting healthy lifestyles, including topics such as diet, sleep, physical activity, and sedentary behavior. Sociodemographic and anthropometric measures were assessed at baseline, and socio-emotional development was assessed using the Bayley Scales of Infant and Toddler Development - Third Edition (Bayley-III) at baseline and post-intervention. RESULTS: After the intervention, a significant difference in socio-emotional development was observed between children with mothers of varying education levels. Specifically, children whose mothers had lower education levels demonstrated significantly greater socio-emotional development (B = 19.000, p = 0.028) compared to the control group. In contrast, there was no significant difference in socio-emotional development among children with mothers from higher education levels. CONCLUSION: These findings suggest that intervention programs for childcare teachers can effectively promote healthy socio-emotional development in children from socioeconomically disadvantaged backgrounds. Future intervention programs should consider tailoring their approaches to target disadvantaged populations. TRIAL REGISTRATION: This cluster randomized controlled trial was registered in the Clinical Trials database/platform on 09/09/2019 (number NCT04082247).- Fundação Calouste Gulbenkian(221669

Efeitos tardios da co exposição larval a doses realísticas do inseticida clotianidina e do fungicida piraclostrobina : avaliação da longevidade das operárias adultas de apis mellifera africanizada

Nos últimos anos, as abelhas vêm sofrendo um declínio populacional que afeta os serviços ecossistêmicos de polinização, dentre os fatores desse declínio estão os agrotóxicos. Com o objetivo de avaliar o efeito da exposição a uma mistura do inseticida clotianidina e do fungicida piraclostrobina no desenvolvimento de Apis mellifera africanizada, larvas de primeiro instar obtidas de três colônias foram transferidas para cúpulas com dieta artificial padronizada. Realizou-se exposição repetida por via oral nas larvas, do terceiro ao sexto dia do bioensaio. O consumo total do inseticida foi de 0,2364 ng/larva e do fungicida de 23,63 ng/larva. Avaliou-se a longevidade das abelhas emergidas e realizou a caracterização química dos compostos por infravermelho. Os agrotóxicos não apresentaram efeitos deletérios nas larvas e pupas. Entretanto, as abelhas expostas ao inseticida isolado e aos dois agrotóxicos combinados apresentaram redução na longevidade dos adultos emergidos (p<0,01). O decréscimo no tempo de sobrevivência foi maior no grupo exposto apenas ao inseticida, sendo que a presença do fungicida no grupo co-exposto atenuou este decréscimo na longevidade, possivelmente por uma interação dos compostos químicos dos agrotóxicos, evidenciada pela mudança no padrão do espectrograma. O fungicida isolado não alterou a longevidade das abelhas (p>0,1). A co-exposição pode ter diminuído a toxicidade do inseticida por meio de interações químicas e/ou facilitado o processo de desintoxicação destes xenobióticos no organismo, reduzindo a mortalidade. Do ponto de vista da dinâmica populacional da colônia, estes dados são preocupantes, visto que as concentrações dos agrotóxicos foram encontradas nos recursos alimentares das abelhasFil: Menezes Tadei, Rafaela. Universidade Federal de Sao Carlos (Brasil)Fil: Aparecido, J.. Universidade Federal de Sao Carlos (Brasil)Fil: Silva Zacarin, Elaine C. M.. Universidade Federal de Sao Carlos (Brasil

DT-TTF Salts with [Cu(dcdmp)2]−: The Richness of Different Stoichiometries

(DT-TTF)[Cu(dcdmp)(2)] (1), (DT-TTF)(2)[Cu(dcdmp)(2)] (2), and (DT-TTF)(3)[Cu(dcdmp)(2)](2) (3) are three new charge transfer salts obtained by electrocrystallization of the donor DT-TTF (dithiophene-tetrathiafulvalene) with the diamagnetic copper complex [Cu(dcdmp)(2)](-) (dcdmp = 2,3-dicyano-5,6-dimercaptopyrazine). Compounds 1 and 3 crystallize in the triclinic system and consist of out-of-registry layers of mixed stacks of donor and acceptor molecules. (DT-TTF)(2)[Cu(dcdmp)(2)] presents a structure similar to the parent spin-ladder systems with donor stacks arranged in pairs; however, a magnetic spin-ladder behavior is not observed probably due to strong interactions between pairs. Compound 3, despite the mixed nature of the stacks, displays relatively high conductivity (7 S/cm) due to a one-dimensional network of interactions between donors.This work was supported by FCT (Portugal) through contracts PTDC/QEQ-SUP/1413/2012 and UID/Multi/04349/2013 and by DGI, Spain (CTQ2013-40480), the Generalitat de Catalunya (2014SGR0017), the CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), promoted by ISCIII, Spain. R. A. L. S. is thankful to FCT for the PhD grant SFRH/BD/86131/2012.Peer reviewe

An analysis of rainfall based on entropy theory

The principle of maximum entropy can provide consistent basis for analyzing rainfall and for geophysical processes in general. The daily rainfall data was assessed using the Shannon entropy for a 10-years period from 189 stations in the northeastern region of Brazil. Mean values of marginal entropy were computed for all observation stations and isoentropy maps were then constructed for delineating annual and seasonal characteristics of rainfall. The Mann-Kendall test was used to evaluate the long-term trend in marginal entropy for two sample stations. The marginal entropy values of rainfall were higher for locations and periods with highest amount of rainfall. The results also showed that the marginal entropy decreased exponentially with increasing coefficient of variation. The Shannon theory produced spatial patterns which led to a better understanding of rainfall characteristics throughout the northeastern region of Brazil. Trend analysis indicated that most time series did not have any significant trends

Obstáculo epistemológico em material da mídia impressa para contextualização no Ensino de Química.

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Electrospun magnetic ionic liquid based electroactive materials for tissue engineering applications

Functional electrospun fibers incorporating ionic liquids (ILs) present a novel approach in the development of active microenviroments due to their ability to respond to external magnetic fields without the addition of magnetic particles. In this context, this work reports on the development of magnetically responsive magneto-ionic fibers based on the electroactive polymer poly(vinylidene fluoride) and the magnetic IL (MIL), bis(1-butyl-3-methylimidazolium) tetrathiocyanatocobaltate ([Bmim]2[(SCN)4Co]). The PVDF/MIL electrospun fibers were prepared incorporating 5, 10 and 15 wt.% of the MIL, showing that the inclusion of the MIL increases the polar β-phase content of the polymer from 79% to 94% and decreases the crystallinity of the fibers from 47% to 36%. Furthermore, the thermal stability of the fibers decreases with the incorporation of the MIL. The magnetization of the PVDF/MIL composite fibers is proportional to the MIL content and decreases with temperature. Finally, cytotoxicity assays show a decrease in cell viability with increasing the MIL content.This research was funded by FCT—Fundação para a Ciência e Tecnologia (FCT) under the scope of the strategic funding of UID/FIS/04650/2020, and project PTDC/BTM-MAT/28237/2017. Moreover, the authors thank FCT for the research grant SFRH/BD/145345/2019 (LMC), SFRH/BD/148655/2019 (RMM), and D.M.C. and CR thank the FCT for the contract under the Stimulus of Scientific Employment 2020.02915.CEECIND and 2020.04163.CEECIND, respectively.The authors acknowledge funding by Spanish State Research Agency (AEI) and the European Regional Development Fund (ERFD) through the project PID2019-106099RB-C43/AEI/10.13039/501100011033 and from the Basque Government Industry Departments under the ELKARTEK program. Technical and human support provided by IZO-SGI, SGIker (UPV/EHU, MICINN, GV/EJ, ERDF and ESF) is gratefully acknowledged

Cutting Forces Assessment in CNC Machining Processes: A Critical Review

Machining processes remain an unavoidable technique in the production of high-precision parts. Tool behavior is of the utmost importance in machining productivity and costs. Tool performance can be assessed by the roughness left on the machined surfaces, as well as of the forces developed during the process. There are various techniques to determine these cutting forces, such as cutting force prediction or measurement, using dynamometers and other sensor systems. This technique has often been used by numerous researchers in this area. This paper aims to give a review of the different techniques and devices for measuring the forces developed for machining processes, allowing a quick perception of the advantages and limitations of each technique, through the literature research carried out, using recently published worksThe present work was done and funded under the scope of the project ON-SURF (ANI | P2020 | POCI-01-0247-FEDER-024521, co-funded by Portugal 2020 and FEDER, through COMPETE 2020-Operational Programme for Competitiveness and Internationalisation. F.J.G. Silva also thanks INEGI-Instituto de Ciência e Inovação em Engenharia Mecânica e Engenharia Industria, due to its support.info:eu-repo/semantics/publishedVersio