Resumo O espraiamento recente das plataformas digitais tem provocado novas dinâmicas da relação entre trabalho e cidade. O objetivo deste artigo é analisar os fluxos urbanos dos entregadores de aplicativos pela metrópole de São Paulo para explorar empiricamente as condições em que esse trabalho se inscreve na cidade. Argumentamos que a dispersão de milhares de trabalhadores pela metrópole, ancorada por uma gestão algorítmica, somente se realiza por um controle incisivo do tempo, do território e do próprio trabalho e pela intensa vulnerabilidade dos trabalhadores. Mobilizando dados obtidos por meio de incursões etnográficas, entrevistas e elaboração de material cartográfico, buscaremos discutir as dinâmicas de (re)produção das desigualdades centro-periferia de um trabalho que se espacializa sob gestão centralizada das empresas de plataforma. cidade algorítmica tempo etnográficas cartográfico reprodução re produção centroperiferia centro periferia plataforma

Abstract The recent spread of digital platforms has produced new dynamics in the relationship between work and the city. The aim of this article is to analyze urban flows of app-based delivery workers in the São Paulo metropolis to explore empirically the conditions under which this work is inscribed in the city. We argue that the dispersion of thousands of workers throughout the metropolis, supported by an algorithmic management, can only be carried out through an incisive control of time, territory, and of the work itself, as well as through the workers’ intense vulnerability. Using data obtained by means of ethnographic incursions, interviews, and by the development of cartographic material, we seek to discuss the dynamics of (re)production of central-peripheral inequalities along with work that is spatialized under the centralized management of platform companies. city appbased app based time territory itself vulnerability incursions interviews material reproduction re production centralperipheral central peripheral companies

RESUMO JUSTIFICATIVA E OBJETIVOS: A abordagem das cefaleias secundárias na infecção pela SARS-CoV-2 é crucial para um manejo adequado e otimização do cuidado. Esta revisão tem como objetivo sintetizar os dados sobre as características da cefaleia e o impacto das condições pré-existentes de cefaleia sobre esses sintomas na infecção pela SARS-CoV-2. CONTEÚDO: Uma pesquisa sistemática foi realizada em vários bancos de dados, incluindo: Pubmed/Medline, Cochrane Collaboration, Web of Science, Scopus, LILACS, Embase, Open Grey e Google Scholar, com o objetivo de identificar estudos sobre as características da cefaleia associadas à SARS-CoV-2. A pesquisa se concentrou nos sintomas, nas características, no início, na duração e na resposta ao tratamento da cefaleia durante e após a infecção. Vinte e três estudos atenderam aos critérios de inclusão. Aproximadamente 42,1% dos indivíduos com SARS-CoV-2 relataram dores de cabeça, semelhantes a dores de cabeça do tipo tensional e enxaquecas. Essas cefaleias geralmente se manifestavam nos primeiros três dias de infecção e podiam persistir por até quatro meses. Os dados sugerem que a ativação trigeminovascular e os mediadores pró-inflamatórios desempenham um papel importante na patogênese da cefaleia, com condições preexistentes de cefaleia exacerbando os sintomas. A importância de estratégias eficazes de controle da dor deve ser enfatizada. CONCLUSÃO: A cefaleia é um sintoma prevalente entre os indivíduos infectados pela SARS-CoV-2, com significativas implicações no atendimento ao paciente. Os achados deste estudo enfatizam a importância do reconhecimento das características da cefaleia no manejo da SARS-CoV-2 e sugerem que abordagens clínicas personalizadas são essenciais para o alívio eficaz dos sintomas. OBJETIVOS SARSCoV2 SARSCoV SARS CoV 2 SARS-CoV- cuidado préexistentes pré existentes SARSCoV2. 2. CONTEÚDO incluindo PubmedMedline Pubmed Medline Pubmed/Medline Collaboration Science Scopus LILACS Embase Scholar início inclusão 421 42 1 42,1 enxaquecas meses próinflamatórios pró inflamatórios enfatizada CONCLUSÃO SARSCoV2, 2, paciente SARS-CoV 4 42,

ABSTRACT BACKGROUND AND OBJECTIVES: Addressing secondary headaches in SARS-CoV-2 infection is crucial for effective management and care optimization. This review aims to synthesize data on headache characteristics and the impact of pre-existing headache conditions on these symptoms in SARS-CoV-2 infection. CONTENTS: A systematic search was conducted across multiple databases, including PubMed/Medline, Cochrane Collaboration, Web of Science, Scopus, LILACS, Embase, Open Grey, and Google Scholar, to identify studies on headache characteristics associated with SARS-CoV-2. The search focused on headache symptoms, characteristics, onset, duration, and response to treatment during and post-infection. Twenty-three studies met the inclusion criteria. Approximately 42.1% of individuals with SARS-CoV-2 reported headaches, resembling tension-type headaches and migraines. These headaches often manifested within the first three days of infection and could persist for up to four months. The data suggest that trigeminovascular activation and pro-inflammatory mediators play a significant role in headache pathogenesis, with pre-existing headache conditions exacerbating the symptoms. The importance of effective pain management strategies must be emphasized. CONCLUSION: Headache is a prevalent symptom among SARS-CoV-2 infected individuals, with significant implications for patient care. The findings emphasize the importance of recognizing headache characteristics in SARS-CoV-2 management and suggest that tailored clinical approaches are essential for effective symptom relief. OBJECTIVES SARSCoV2 SARSCoV SARS CoV 2 SARS-CoV- optimization preexisting pre existing CONTENTS databases PubMedMedline PubMed Medline PubMed/Medline Collaboration Science Scopus LILACS Embase Grey Scholar SARSCoV2. 2. onset duration postinfection. postinfection post post-infection Twentythree Twenty criteria 421 42 1 42.1 tensiontype tension type migraines months proinflammatory pro inflammatory pathogenesis emphasized CONCLUSION relief SARS-CoV 4 42.

ABSTRACT Objective: This study aimed to present a temporal and spatial analysis of the 2018 measles outbreak in Brazil, particularly in the metropolitan city of Manaus in the Amazon region, and further introduce a new tool for spatial analysis. Methods: We analyzed the geographical data of the residences of over 7,000 individuals with measles in Manaus during 2018 and 2019. Spatial and temporal analyses were conducted to characterize various aspects of the outbreak, including the onset and prevalence of symptoms, demographics, and vaccination status. A visualization tool was also constructed to display the geographical and temporal distribution of the reported measles cases. Results: Approximately 95% of the included participants had not received vaccination within the past decade. Heterogeneity was observed across all facets of the outbreak, including variations in the incubation period and symptom presentation. Age distribution exhibited two peaks, occurring at one year and 18 years of age, and the potential implications of this distribution on predictive analysis were discussed. Additionally, spatial analysis revealed that areas with the highest case densities tended to have the lowest standard of living. Conclusion: Understanding the spatial and temporal spread of measles outbreaks provides insights for decision-making regarding measures to mitigate future epidemics. Objective 201 Brazil region Methods 7000 7 000 7,00 2019 symptoms demographics status cases Results 95 decade presentation peaks 1 age discussed Additionally living Conclusion decisionmaking decision making epidemics 20 700 00 7,0 9 2 70 0 7,

Two novel coordination polymers were synthesized through the reaction of the Hpcpa2- ligand (H3pcpa = N-(4-carboxyphenyl)oxamic acid) with cadmium(II) and lead(II) metal ions, yielding [Cd2(Hpcpa)2(H2O)6]n·H2O (1) and [Pb(Hpcpa)(H2O)]n (2). Structural analysis by single-crystal X-ray diffraction revealed that 1 consists of one-dimensional zigzag polymeric chains, while 2 is a three-dimensional polymer network. Additionally, investigations of their optical properties were carried out in a comparative study involving the previously reported pcpa-based coordination polymers {[Zn(Hpcpa)(H2O)3]·0.5H2O}n and {[Gd2(Hpcpa)3(H2O)5]·H2O}n], called here as 3 and 4, respectively. Under 330 nm excitation wavelength, all compounds exhibited broad emission bands spanning from 350 to 650 nm. Particularly, 1 and 3 displayed notable external quantum yields of 15.4 and 12.8%, respectively, highlighting their potential in luminescent applications. Hpcpa2 Hpcpa H3pcpa H pcpa N4carboxyphenyloxamic Ncarboxyphenyloxamic N 4 carboxyphenyl oxamic acid cadmiumII cadmium II cadmium(II leadII lead lead(II ions Cd2Hpcpa2H2O6n·H2O Cd2Hpcpa2H2O6nH2O CdHpcpaHOnHO Cd2 H2O 6 n·H2O n Cd O (1 PbHpcpaH2On PbHpcpaHOn Pb 2. . (2) singlecrystal single crystal Xray X ray onedimensional one dimensional chains threedimensional three network Additionally pcpabased based ZnHpcpaH2O3·0.5H2On ZnHpcpaH2O305H2On ZnHpcpaHOHOn Zn ·0.5H2O 0 5H2O Gd2Hpcpa3H2O5·H2On, Gd2Hpcpa3H2O5H2On GdHpcpaHOHOn Gd2 5 ·H2O , Gd {[Gd2(Hpcpa)3(H2O)5]·H2O}n] respectively 33 wavelength 35 65 Particularly 154 15 15. 128 12 8 12.8% applications carboxyphenyloxamic Cd2Hpcpa2H2O6n nH HO nH2O nHO ( PbHpcpaH On (2 ZnHpcpaH2O3 5H2On ZnHpcpaH 05H2O Gd2Hpcpa3H2O5 H2On Gd2Hpcpa3H2O5·H2On {[Gd2(Hpcpa)3(H2O)5]·H2O}n 12.8 CdHpcpaHOn ZnHpcpaHO ZnHpcpaH2O HOn GdHpcpaHO Gd2Hpcpa3H2O 12.

Resumo Objetivo Analisar a associação entre a adesão à terapia medicamentosa com nível de entendimento e complexidade da prescrição, bem como avaliar a concordância entre dois questionários de adesão aplicados a pessoas idosas polimedicadas. Método Trata-se de estudo transversal, com pessoas idosas atendidas no ambulatório de geriatria de um hospital universitário do Rio de Janeiro, Brasil. Nesses pacientes foi avaliado a adesão à terapia medicamentosa (Brief Medication Questionarie - BMQ e Instrumento de Avaliação da Atitude frente à tomada de remédios - IAAFTR), o conhecimento sobre os medicamentos prescritos e a complexidade da farmacoterapia. Para análise estatística foram utilizados testes qui-quadrado e exato de Fisher sendo considerado o nível de significância de p-valor ≤0,05. A concordância entre os dois métodos de adesão foi avaliada pelo índice Kappa. Resultados Dos 49 idosos entrevistados, 75,5% eram mulheres, hipertensão arterial (82%) e diabetes (37%) as doenças mais prevalentes. Observou-se pelos testes BMQ e IAAFTR que 35% e 45% dos pacientes, respectivamente, eram aderentes a terapia medicamentosa. Não houve concordância de resultado entre os métodos de adesão. Grande parte dos pacientes apresentou bom nível de informação sobre seus medicamentos, porém, a maioria deles foi considerada não aderente. Não foi observado associação estatisticamente significativa entre a complexidade da prescrição frente a adesão e ao nível de informação sobre medicamentos. Conclusão A adesão a terapia medicamentosa é um processo multifatorial e as ferramentas de avaliação de adesão e de outros fatores que a influência deve ser criteriosamente escolhida de acordo com a população de estudo, pois em nosso trabalho elas apresentaram respostas diferenciadas. polimedicadas Tratase Trata se transversal Janeiro Brasil Brief IAAFTR, , IAAFTR) farmacoterapia quiquadrado qui quadrado pvalor p valor 005 0 05 ≤0,05 Kappa 4 entrevistados 755 75 5 75,5 mulheres 82% 82 (82% 37% 37 (37% prevalentes Observouse Observou 35 45 respectivamente porém aderente diferenciadas 00 ≤0,0 7 75, 8 (82 3 (37 ≤0, (8 (3 ≤0 ( ≤

Abstract Objective To analyze the association between medication therapy adherence and level of understanding and complexity of the prescription, as well as to assess the agreement between two adherence questionnaires administered to polymedicated older adults. Method This is a cross-sectional study involving older adults attending the geriatrics outpatient clinic at a university hospital in Rio de Janeiro, Brazil. In these patients, medication therapy adherence (assessed using the Brief Medication Questionnaire - BMQ and the Instrument for Assessing Attitudes Toward Medication Taking - IAAFTR), knowledge about prescribed medications, and pharmacotherapy complexity were evaluated. Statistical analysis was conducted using Chi-square tests and Fisher's Exact test, with a significance level set at p-value ≤ 0.05. The agreement between the two adherence methods was assessed using the Kappa index. Results Of the 49 interviewed older adults, 75.5% were women, with arterial hypertension (82%) and diabetes (37%) being the most prevalent conditions. According to the BMQ and IAAFTR tests, 35% and 45% of patients, respectively, were adherent to medication therapy. There was no agreement in the results between the adherence methods. A large proportion of patients exhibited a good level of information about their medications; however, the majority of them were considered non-adherent. No statistically significant association was observed between prescription complexity and adherence, nor between the level of medication information and adherence. Conclusion Medication therapy adherence is a multifactorial process, and the assessment tools for adherence and other influencing factors should be carefully chosen according to the study population, as they exhibited different responses in our work. crosssectional cross sectional Janeiro Brazil IAAFTR, , IAAFTR) medications evaluated Chisquare Chi square Fishers Fisher s test pvalue p value 005 0 05 0.05 index 4 755 75 5 75.5 women 82% 82 (82% 37% 37 (37% conditions 35 45 respectively however nonadherent. nonadherent non adherent. non-adherent process population work 00 0.0 7 75. 8 (82 3 (37 0. (8 (3 (

RESUMO Este artigo tem como objetivo responder à pergunta: A superdotação intelectual em seres humanos, quando comparada à inteligência normal de indivíduos, está associada à experiência de depressão ou de transtorno depressivo? Considerando resultados de cinco bases (PsycInfo, Web of Science, Scopus, SciELO e PubMed) e critérios de inclusão e de exclusão, relaciona-se a depressão em superdotados: à autoestima (n = 4); a comportamentos internalizantes (n = 2); ao estresse (n = 4); a fatores de proteção e/ou risco (n = 5); à ideação suicida (n = 2); ao perfeccionismo (n = 3); ao ajustamento emocional (n = 6). A diversidade de critérios para superdotação ou de testes psicométricos utilizados restringe a possibilidade de conclusão; contudo, observam-se pontos de convergência. Por um lado, três estudos revelaram que os superdotados eram menos deprimidos do que os alunos de desempenho normal, e um artigo revelou o contrário. Um estudo ratificou a proposição de que meninas são mais deprimidas do que meninos na mesma condição. Por outro lado, os resultados de dois artigos demonstraram que, entre os superdotados, meninos são mais deprimidos do que meninas. Postula-se a realização de futura metanálise a fim de mensurar a significância e o tamanho do efeito de cada resultado. pergunta humanos indivíduos depressivo PsycInfo, PsycInfo (PsycInfo Science Scopus PubMed exclusão relacionase relaciona se n 4 4) 2 2) eou 5 5) 3 3) 6. 6 . 6) conclusão contudo observamse observam convergência lado contrário condição Postulase Postula resultado

ABSTRACT This article aims to answer the question: Is intellectual giftedness in human beings, when compared to the normal intelligence of individuals, associated with the experience of depression or depressive disorder? Considering the results of five databases (PsycInfo, Web of Science, Scopus, SciELO and PubMed) and inclusion and exclusion criteria, depression in gifted individuals is related to: self-esteem (n = 4); internalizing behaviors (n = 2); stress (n = 4); protective and/or risk factors (n = 5); suicidal ideation (n = 2); perfectionism (n = 3); emotional adjustment (n = 6). The diversity of criteria for giftedness or psychometric tests used restricts the possibility of conclusion; however, points of convergence are observed. In the one hand, three studies found that the gifted were less depressed than average-achieving students, one article found the opposite. One study confirms the proposition that girls are more depressed than boys in the same condition. On the other hand, the results of two articles demonstrate that, among the gifted, boys are more depressed than girls. It is postulated that a future meta-analysis will be carried out in order to measure the significance and effect size of each result. question beings disorder PsycInfo, PsycInfo (PsycInfo Science Scopus PubMed selfesteem self esteem n 4 4) 2 2) andor 5 5) 3 3) 6. 6 . 6) conclusion however observed hand averageachieving average achieving students opposite condition metaanalysis meta analysis result

In this study, the interaction between benzothiazole (BTA, concentration of a drug required for 50% inhibition in vitro (IC50) = 0.77 mM) and benzimidazole (BIA, IC50 = 2.14 mM) with urease was quantitatively assessed, using UV-Vis, molecular fluorescence, and circular dichroism. The results showed that both compounds interact with urease by a static fluorescence quenching mechanism with a non-fluorescent complex formation. The main forces responsible for stabilizing the supramolecular complex between BTA and urease were hydrophobic while, for BIA, van der Waals interactions and hydrogen bonds were the main ones. Urease conformation changes due to the interaction process were analyzed by circular dichroism and synchronous fluorescence. Besides, a competitive assay with substrate and inhibitors was used to evaluate the preferential urease site of interaction with BTA and BIA. Our experimental and theoretical studies supported that both, BTA and BIA, are mixed-inhibitors of ureases with a slight preference to the active site of such enzymes. Finally, both BTA and BIA showed to possess anti-Helicobacter pylori (one reference strain and six clinical isolates) activity, presenting minimal inhibitory concentration (MIC) values ranging from 38-150 and 20-164 µM, respectively. The urease inhibitors omeprazole and hydroxyurea showed MIC values in the range of 46-185 µM and 1683-> 3366 µM, respectively.

RESUMO O presente estudo teve como objetivo a análise do lançamento de disco em atletas paralímpicos de duas classes funcionais (CFs). Sete atletas de duas classes F-44 (N=4) e F-46 (N=3) executaram 3 lançamentos cada durante uma competição regional, e foram avaliados por meio de cinemetria 3D. Os atletas avaliados apresentaram uma técnica de lançamento semelhante, com movimento de preparação em direção oposta ao lançamento que antecedia o arremate. Na classe F-44 houve uma fraca correlação entre a velocidade de decolagem e o alcance do disco (r= 0,15; p>0,05). Na F-46 houve forte correlação entre a velocidade de decolagem e o alcance (r= 0,77; p=0,014). Conclui-se que atletas das CFs avaliadas apresentam diferenças importantes em termos de desempenho.

ABSTRACT This study aimed to analyze discus throwing in Paralympic athletes from two functional classes (FCs). Seven athletes from two classes F-44 (N=4) and F-46 (N=3) performed three throws each during a regional competition and were evaluated through 3D kinemetry. The assessed athletes presented a similar throwing technique, with a preparation movement opposite to the throw preceding the shot. Class F-44 showed a weak correlation between take-off speed and range (r= 0.15; p>0.05). F-46 showed a strong correlation between take-off speed and range (r=0.77; p=0.014). We conclude that athletes from the assessed FCs present important differences in terms of performance.

RESUMEN El presente estudio tuvo como objetivo analizar el lanzamiento de disco en atletas paralímpicos de dos clases funcionales (FC). Siete atletas de dos clases F-44 (N = 4) y F-46 (N = 3) realizaron 3 lanzamientos cada uno durante una competencia regional, y fueron evaluados usando cinemetría 3D. Los deportistas evaluados presentaron una técnica de lanzamiento similar, con un movimiento de preparación en sentido contrario al lanzamiento que precedió al tiro. En la clase F-44 hubo una correlación débil entre la velocidad de despegue y el alcance del disco (r = 0,15; p> 0,05). En el F-46 hubo una fuerte correlación entre la velocidad de despegue y el alcance (r = 0,77; p = 0,014). Se concluye que los deportistas de los CF evaluados presentan importantes diferencias en cuanto a rendimiento.

RESUMO Objetivo: investigar como as escalas para o conceito de virtudes morais são construídas e mensuradas, em estudos associados à ética empresarial e à tradição da ética das virtudes. Métodos: realizou-se uma revisão sistemática da literatura para selecionar artigos empíricos sobre virtudes morais que elaboram ou aplicam escalas. Com base em critérios de busca, seleção e análise, foram consultadas cinco bases de dados e selecionados 37 trabalhos, analisando-se o procedimento de desenvolvimento e mensuração de escalas (itens, amostra, análise fatorial) e fatores emergentes. Resultados: o estudo reúne escalas de múltiplas virtudes morais (19) e de virtudes específicas (18), evidenciando limitações na geração de itens e na proporção item-amostra em algumas escalas, como também contribuições teóricas em liderança e fortalecimento de relações, fazendo uma discussão teórico-metodológica, à luz dos pressupostos da ética das virtudes na tradição aristotélico-tomista. Conclusões: o artigo intenciona contribuir para uma melhor compreensão sobre as virtudes morais em administração, ao discutir as escalas a partir da unidade das virtudes e da conexão phronesis-virtudes morais, com implicações no comportamento humano e na ética empresarial. Recomendam-se procedimentos para estudos futuros qualitativos e quantitativos em novos contextos de pesquisa.

ABSTRACT Objective: to investigate how scales for the concept of moral virtues are constructed and measured, in studies associated with business ethics and the tradition of virtue ethics. Methods: a systematic literature review was conducted to select empirical articles on moral virtues that design or apply scales. Based on search, selection, and analysis criteria, five databases were consulted, and 37 papers were selected, with subsequent analysis of the scales development and measurement procedure (items, sample, factor analysis) and emerging factors. Results: the study gathers scales of multiple moral virtues (19) and of specific virtues (18), showing limitations in the generation of items, and in the item-sample proportion in some scales, as well as theoretical contributions in leadership and relationship strengthening, making a theoretical and methodological discussion in the light of the assumptions of virtue ethics in the Aristotelian-Thomistic tradition. Conclusions: the article intends to contribute to a better understanding of moral virtues in management, by discussing the scales from the unity of virtues and the phronesis-moral virtues connection, with implications for human behavior and business ethics. Procedures are recommended for future qualitative and quantitative studies in new research contexts.

Abstract The current COVID-19 pandemic has already claimed more than 3.7 million victims and it will cause more deaths in the coming months. Tools that track the number and locations of cases are critical for surveillance and help in making policy decisions for controlling the outbreak. However, the current surveillance web-based dashboards run on proprietary platforms, which are often expensive and require specific computational knowledge. We developed a user-friendly web tool, named OUTBREAK, that facilitates epidemic surveillance by showing in an animated graph the timeline and geolocations of cases of an outbreak. It permits even non-specialist users to input data most conveniently and track outbreaks in real-time. We applied our tool to visualize the SARS 2003, MERS, and COVID19 epidemics, and provided them as examples on the website. Through the zoom feature, it is also possible to visualize cases at city and even neighborhood levels. We made the tool freely available at https://outbreak.sysbio.tools/. OUTBREAK has the potential to guide and help health authorities to intervene and minimize the effects of outbreaks.

Resumo: A Supply Chain vem passando por grandes transformações em função da necessidade de implementação de novas tecnologias da Indústria 4.0, como a Internet das Coisas, Big Data, Sistemas Físico-Cibernéticos e a Computação em Nuvem. Graças a essas tecnologias, bem como a seus subsistemas e componentes, a integração total da Supply Chain está se tornando possível. No entanto, observa-se que ainda não estão totalmente claros e identificados os reais impactos, positivos ou negativos, que as tecnologias da Indústria 4.0 causam na Supply Chain. Este trabalho tem como objetivo identificar e apresentar uma análise dos desafios que as empresas deverão enfrentar ao implantar as tecnologias da Indústria 4.0 na Supply Chain. Para isso, foram selecionados e analisados, por meio de uma revisão sistemática da literatura, os trabalhos mais relevantes sobre o tema. A revisão identificou vinte desafios agrupados em quatro macrogrupos: (1) desafios técnicos, (2) desafios financeiros, ambientais e legais, (3) desafios tecnológicos e (4) desafios socioculturais. Observa-se que estes desafios requerem grande atenção e estudos mais aprofundados por parte da academia para apoiar a indústria no sentido de mitigá-los e, assim, permitir melhor aproveitamento dos recursos tecnológicos disponíveis e otimizar o desempenho das operações da Supply Chain.

Abstract: The Supply Chain has undergone major transformations due to the need to implement new Industry 4.0 technologies, such as Internet of Things, Big Data, Cyber-Physical Systems and Cloud Computing. Thanks to these technologies, as well as to their subsystems and components, full integration of the supply chain is becoming possible. However, it is observed that the real impacts of Industry 4.0 technologies, rather positive or negative, are not yet totally clear and identified. This paper aims to identify and present an analysis of the challenges and obstacles that Industry 4.0 technologies may cause in the Supply Chain. For this, the most relevant papers on the topic were selected and analyzed through a systematic literature review. Twenty challenges grouped into four macrogroups were identified: (1) technical challenges, (2) financial, environmental and legal challenges, (3) technological challenges, and (4) sociocultural challenges. It should be noted that these challenges require greater attention and more in-depth studies on the part of the academy to support industry in order to mitigate them and thus allow better use of the available technological resources and optimize the performance of Supply Chain operations.

Four new complexes of formula [Fe(H2pcpa)2(H2O)2] (1), {[Mn(Hpcpa)(H2O)3]•1/2H2O}n (2), {[Zn(Hpcpa)(H2O)3]•1/2H2O}n (3) and [Cu2(Hpcpa)2(bipy)2]•8H2O (4) [H3pcpa = N-(4-carboxyphenyl)oxamic acid; bipy = 2,2¢-bipyridine] have been synthesized and their structures determined by X-ray diffraction. The structure of 1 consists of mononuclear iron(II) units where each iron(II) ion is six-coordinate by two trans-positioned water molecules and two bidentate H2pcpa- ligands building a distorted octahedral environment. 2 and 3 consist of neutral zigzag chains of MnII and ZnII ions respectively, the Hpcpa2- groups acting as linkers in a bidentate/monodentate coordination mode with three mer-positioned water molecules achieving the six-coordination around the metal centers. Compound 4 is a neutral centrosymmetric dicopper(II) complex where two Hpcpa2- groups adopting the bidentate/monodentate coordination mode and act as bridges and bidentate bipy molecules act as end-cap ligands, describing a square pyramidal surrounding around each copper atom. Cryomagnetic measurements for 1, 2 and 4 in the temperature range 1.9-300 K reveal the occurrence of a field-induced single-ion magnet (SIM) behavior (1) and weak interchain (J = -0.22 cm-1, 2) and intradimer (J = -0.39 cm-1, 4) antiferromagnetic interactions, the Hamiltonian being defined as H = -J Sa.Sb.

Resumen Este artículo presenta un sistema de adquisición de datos para medir la fuerza de corte en el proceso de roscado hecho en un torno convencional. São usados modelos analíticos para encontrar la profundidad del corte de la herramienta de fabricación. La fuerza de la herramienta de corte puede ser responsable por el colapso de la herramienta debido a la deformación plástica de la arista. La fuerza de corte fue obtenida a través de medidas directas en muestras seleccionadas permitiendo obtener datos confiables comparados con datos obtenidos del análisis teórico. El sistema fue implementado en LabView® analizando diversas variables que entran en juego en el proceso de manufactura en tornos convencionales. Es posible así encontrar en tiempo real la profundidad del corte. Específicamente, los autores presentan resultados usando los modelos de Fredericks, Sandvik y Lira. El análisis permite obtener conclusiones sobre la fuerza de corte de cada modelo.

Abstract This report concerns a data acquisition system with the final idea of measuring the cutting force in the threading process done on a conventional lathe. Analytical models are used to find the depth of cut of the machining tool. This is important because the machining force can be responsible for the tool collapse by plastic edge deformation. The cutting force was obtained through direct measurements in selected samples. This allows obtaining more realistic data compared with data obtained by analytical estimation from theory. The data acquisition system was implemented in LabView®, and it allowed analyzing the several variables involved in the machining process on conventional lathes. In such a way, it is possible to find out, in real time, the depth of cut variable. Specifically, the authors present results obtained from analysis of Fredericks, Sandvik and Lira models. This analysis allows drawing conclusions about the cutting force from each model.