In this work, a miniaturized version of the QuEChERS (quick, easy, cheap, effective, rugged, and safe) method was optimized, validated, and applied for extracting eight pesticide residues in anuran liver tissue samples. The extracts were quantified by high-performance liquid chromatography with diode array detection, and the detected residues in liver tissue samples were identified by tandem mass spectrometry-liquid chromatography. The optimized extraction method entailed the scale reduction of the QuEChERS method twenty times using 500 mg of liver tissue sample, 200 mg Mg2SO4, 50 mg NaCl, 1.5 mL of acetonitrile, and a mixture of 25 mg C18 + 25 mg PSA (primary-secondary amine) as dispersive solid-phase extraction sorbent. The method was validated using liver tissue samples spiked at two levels of pesticide concentrations according to the SANTE/11312/2021 document. Recoveries ranged from 91-110% with a relative standard deviation < 20%. The method robustness assessed by the Steiner and Youden test resulted in recovery rate variations of less than 2% for all pesticides after deliberated changes in seven variables. The validated method was applied to 72 liver tissue samples from two anuran species, registering residues of some pesticides in 31 samples. The proposed method proved to be efficient, precise, and robust for determining pesticide residues in anuran liver tissues. work quick, quick (quick easy cheap effective rugged safe highperformance high performance detection spectrometryliquid spectrometry sample 20 Mg2SO4 MgSO Mg SO 5 NaCl 15 1 1. acetonitrile 2 C C1 primarysecondary primary secondary amine solidphase solid phase sorbent SANTE113122021 SANTE 11312 2021 SANTE/11312/202 document 91110% 91110 91 110% 110 91-110 20% variables 7 species 3 efficient precise tissues Mg2SO SANTE11312202 1131 202 SANTE/11312/20 9111 9 11 91-11 SANTE1131220 113 SANTE/11312/2 911 91-1 SANTE113122 SANTE/11312/ 91- SANTE11312 SANTE/11312 SANTE1131 SANTE/1131 SANTE113 SANTE/113 SANTE11 SANTE/11 SANTE1 SANTE/1 SANTE/

ABSTRACT Due to the importance of grain production, and the need to work the soil under limited moisture, the aim of this study was to develop computer software to predict the tractive capacity of wheeled tractors for two types of tyre, the effect of different inflation pressures and levels of soil moisture. A mathematical model was developed to predict the tractive capacity of a 4 x 2 AFT tractor. Software was developed and tested by comparing the computational data with those from tests of a working tractor in the field. The parameters under evaluation were drawbar force and front and rear drive wheel slip. At both moisture levels, the bias tyres had the lowest front to rear slip ratio at the lower pressure; the ratios were similar when equipped with radial tyres. The bias tyres show maximum force at a slip ratio of 1.09 at the higher pressure and 1.03 at the lower, while for the radial tyres the ratio was 1.05 at the higher pressure and 1.07 at the lower. Software was developed to process data from the model, with the results used for estimating the tractive force of the tractor. The tractive force was overestimated by the model, which needs further adjustment for direct application in the field. production tyre field 109 1 09 1.0 103 03 105 05 107 07 10 0 1.

BiOCl/KBiO3 p-n heterostructures with hierarchical mesoporous architectures were successfully synthesized via a facile in situ method. The X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and scanning electron microscope (SEM) results indicate the formation of heterojunctions between BiOCl and KBiO3. The photocatalytic performance of the as-prepared samples was investigated by the degradation of dye Rhodamine B (RhB) under visible light irradiation. BiOCl/KBiO3 composite has never been used to photodegrade the RhB which is a common dye and very difficult to degrade. The results demonstrated that KBiO3 combined with proper amount of BiOCl nanosheets exhibited high efficiency in the photocatalytic process, and BiOCl/KBiO3 with the molar ratio of 70/30 demonstrated the highest photocatalytic activity due to its large surface area, excellent charge separation characteristics and the suppressed recombination of electron-hole pairs. The results of active species detection reveal that the superoxide radical anions (O2-), hydroxyl free radicals (·OH), photogenerated holes (h+) and photogenerated electrons (e-) reactive species work together for the photocatalytic degradation of RhB. A possible and new mechanism of photocatalysis that differs from other teams was also explored and proposed. The present study will benefit the development of the new p-n heterojunction photocatalysts and would be of great importance to meet ever-increasing environmental demands in the future. BiOClKBiO3 BiOClKBiO KBiO BiOCl/KBiO pn p n method Xray X ray XRD, XRD , (XRD) XPS (XPS SEM (SEM asprepared as prepared (RhB irradiation degrade process 7030 70 30 70/3 area electronhole hole pairs O2, O2 O (O2-) ·OH, OH ·OH (·OH) h+ h (h+ e (e- proposed everincreasing ever increasing future (XRD 703 7 3 70/ (O2- (·OH (h (e (O2 (O

Compared to other species, components of Combretum lanceolatum are still with few data reported in the literature. This work describes the compounds identification, antioxidant and antimicrobial activities of C. lanceolatum twigs. Ethanolic extract (EECLT) from C. lanceolatum twigs was submitted to partition obtaining: hexane (HF), diethyl ether (EEF), ethyl acetate (EAF) and hydromethanolic (HMF) fractions. They were analyzed by gas chromatography-mass spectrometry, high performance liquid chromatography coupled to mass spectrometry and direct insertion mass spectrometry and evaluated for antioxidant assay (2,2-diphenyl-1-picrylhydrazyl (DPPH) method) and antimicrobial assay. Fifty-seven compounds were identified in the fractions. In antioxidant assay, EECLT and EAF demonstrated good antioxidant potential (half maximal effective concentration (EC50): 57.9 and 45.4 µg mL–1, respectively), better than the positive control butylated hydroxytoluene (BHT) (EC50: 69.34 µg mL–1). For antimicrobial assay, all fractions presented promising minimal inhibitory concentration (MIC). EECLT presented the best values against Staphylococcus aureus (125 µg mL–1) and Escherichia coli (62.5 µg mL–1) and better than the positive control fluconazole (8 and 16 µg mL–1) against Candida albicans (3.9 µg mL–1) and Candida krusei (15.6 µg mL–1) strains. This study presents relevant chemical and biological information about C. lanceloatum expanding the knowledge of Brazilian flora. species literature identification C (EECLT obtaining HF, HF , (HF) EEF, EEF (EEF) (EAF HMF (HMF chromatographymass 2,2diphenyl1picrylhydrazyl 22diphenyl1picrylhydrazyl diphenylpicrylhydrazyl 2,2 diphenyl 1 picrylhydrazyl 2 DPPH (DPPH method Fiftyseven Fifty seven half EC50 EC (EC50) 579 57 9 57. 454 45 4 45. mL1 mL mL–1 respectively, respectively respectively) BHT (BHT (EC50 6934 69 34 69.3 mL–1. . MIC. MIC (MIC) 125 (12 62.5 625 62 5 (62. 8 ( 3.9 39 3 (3. 15.6 156 15 6 (15. strains flora (HF (EEF 2diphenyl1picrylhydrazyl 22 2, EC5 mL– (EC5 693 69. (MIC 12 (1 62. (62 3. (3 15. (15 (EC (6

Serial numbers are marks present on several day-to-day objects, created by manufacturers for purposes such as quality control, product tracking and to prevent counterfeiting. In the case of firearms, these characters can be obliterated or damaged by natural processes or intentionally by criminals to prevent positive identification of stolen property. One non-destructive method employed by crime laboratories for the restoration of obliterated characters is the magnetic particle method. The present work aims to study the synthesis and application of waste-made magnetic nanoparticles in the recovery of adulterated markings. A set of analytical-grade materials and metallic waste magnetic nanoparticles were synthesized for comparison purposes. Chemical characterization tests by X-ray fluorescence, morphological tests by scanning electron microscopy (SEM), and magnetization tests by vibrating sample magnetometer (VSM) were performed. The efficacy of the synthesized nanoparticles was tested on 1020 steel plates previously engraved and adulterated by sanding. Both homemade magnetic nanoparticles demonstrated superior performance compared to commercial magnetic particles. The application of homemade magnetic particles, especially using waste as the source of production, decreases the cost of the material and is environmentally friendly. The development of this material makes magnetic serial number restoration a better option for widespread use in forensic procedures. daytoday day objects control counterfeiting firearms property nondestructive non destructive wastemade made markings analyticalgrade analytical grade Xray X ray fluorescence SEM, SEM , (SEM) VSM (VSM performed 102 sanding particles production friendly procedures (SEM 10 1

Palicourea tomentosa (Aubl.) Borhidi (Rubiaceae, Palicoureeae), earlier classified as Psychotria poeppigiana Müll. Arg., is used in folk medicine for a variety of diseases. Biological studies on the plant describes their vasorelaxant, antiplasmodial, antitumoural and anticholinesterase activities. To expand the knowledge on the chemical and biological potential of this species, in this work, phytochemical and dereplication studies, as well as antimicrobial and anticholinesterase evaluation of Palicourea tomentosa were carried out. Phytochemical investigation deals with the isolation of lutein (1), a mixture of dehydrovomifoliol (2) and megastigma-4,7-dien-3-one (3), loliolide (4), 5,13-epoxy-9-hydroxy-megastigma-7-en,3-one (5), vomifoliol (6), asperuloside (7), 3-O-p-coumaroylquinic acid (8), and a mixture of the pyrrolizidinoindoline alkaloids hodgkinsine (9), chimonanthine (10) and psychotriasine (11). The ultra-high performance liquid chromatography coupled to high-resolution mass spectrometry (UHPLC HRMS/MS) based on molecular networking dereplication of dichloromethane fraction led to putative identification of other two megastigmanes, one terpene lactone and three carotenoids, besides seven triterpenes and four indole alkaloids. The dichloromethane, ethyl acetate and hydromethanol fractions of P. tomentosa were able to inhibit Candida albicans with minimum inhibitory concentrations (MICs) of 125, 250 and 125 µg mL-1, respectively. The methanol crude extract, dichloromethane and alkaloid fractions inhibited selectively the butyrilcholinesterase (BuChE) at percentages of 63.09, 60.39 and 56.22%, respectively. Aubl. Aubl (Aubl. Rubiaceae, Rubiaceae (Rubiaceae Palicoureeae, Palicoureeae , Palicoureeae) Müll Arg Arg. diseases vasorelaxant antiplasmodial activities species work out 1, 1 (1) 2 (2 megastigma4,7dien3one megastigma47dien3one megastigmadienone megastigma 4,7 dien 3 4 7 3, (3) 4, (4) 5,13epoxy9hydroxymegastigma7en,3one 513epoxy9hydroxymegastigma7en3one epoxyhydroxymegastigmaenone 5,13 epoxy 9 hydroxy en,3 5 13 en 5, (5) 6, 6 (6) 7, (7) 3Opcoumaroylquinic Opcoumaroylquinic O p coumaroylquinic 8, 8 (8) 9, (9) 10 (10 11. 11 . (11) ultrahigh ultra high highresolution resolution UHPLC HRMS/MS HRMSMS HRMS MS megastigmanes carotenoids P MICs (MICs 25 12 mL1, mL1 mL mL-1 respectively extract BuChE (BuChE 6309 63 09 63.09 6039 60 39 60.3 5622 56 22 56.22% (Aubl (1 ( megastigma4 7dien3one 47 (3 (4 13epoxy9hydroxymegastigma7en 3one hydroxymegastigma 513 5,1 en3 en, (5 (6 (7 (8 (9 (11 mL- 630 0 63.0 603 60. 562 56.22 dienone epoxyhydroxymegastigmaen 51 63. 56.2 56.

RESUMO Embora os separadores espirais estáticos sejam eficientes na remoção de partículas de formas e densidades variadas, eles frequentemente descartam sementes de alta qualidade fisiológica. Isso levou ao surgimento de dispositivos que possibilitam a rotação, permitindo assim um controle mais preciso sobre a separação das frações de sementes. O objetivo deste trabalho foi avaliar a qualidade física e fisiológica de sementes de soja separadas em frações qualificadas e descartadas por um separador espiral rotativo. O equipamento utilizado para os testes operou em diferentes velocidades de rotação, processando até 1,2 Mg h-1. Foram utilizados 27 sacos de 30 kg de sementes. Os tratamentos foram constituídos por dois fatores: velocidades de rotação (nula, 5 e 10 rpm) e fluxos de alimentação (0,3, 0,6 e 1,2 Mg h-1), com três repetições. Foram utilizadas sementes de soja da cultivar CZ 37B51 IPRO (safra 2022-2023) com 13% de umidade. A velocidade nula resultou nos maiores descartes de sementes (até 40%), especialmente na maior taxa de fluxo de alimentação. Uma velocidade de 5 rpm também resultou em grandes decartes. Uma velocidade de 10 rpm com fluxos de alimentação de 0,3 e 0,6 Mg h-1 resultou num melhor desempenho, reduzindo o descarte e melhorando a fração de sementes qualificadas, embora possa comprometer a qualidade destas sementes. A velocidade de 10 rpm reduziu o descarte de sementes de alta qualidade, e o fluxo de 1,2 Mg h-1 foi menos eficiente, resultando em maior descarte de sementes de alta qualidade em comparação com fluxos menores. variadas rotativo 12 1 2 1, h1. h1 h 1. 3 fatores nula, (nula 0,3, 03 0 (0,3 06 6 0, h1, , h-1) repetições B 37B5 safra 20222023 2022 2023 2022-2023 13 umidade 40%, 40 40% 40%) decartes h- desempenho eficiente menores (0, 37B 2022202 202 2022-202 4 (0 202220 20 2022-20 ( 20222 2022-2 2022-

ABSTRACT Although static spiral separators are efficient in removing particles of varying shapes and densities, they often discard seeds of high physiological quality. This has led to the emergence of devices that enables rotation, thus allowing more precise control over separation of seed fractions. The objective of this work was to assess the physical and physiological quality of soybean seeds separated into qualified and discarded fractions by a rotary spiral separator. The device used for the tests operated at different rotation speeds, processing up to 1.2 Mg h-1. Twenty-seven 30 kg seed bags were used. Treatments consisted of two factors: rotation speeds (null, 5, and 10 rpm) and feed flow rates (0.3, 0.6, and 1.2 Mg h-1), with three replicates. Soybean seeds of the CZ 37B51 IPRO cultivar (2022-2023 crop season) with 13% moisture content were used. The null speed resulted in the highest seed discards (up to 40%), especially at the highest feed flow rate. A speed of 5 rpm also resulted in high discards. A speed of 10 rpm with feed flows of 0.3 and 0.6 Mg h-1 resulted in better performance, reducing discard and improving the fraction of qualified seeds, although it may compromise the quality of these seeds. A speed of 10 rpm reduced the discard of high-quality seeds, and a flow of 1.2 Mg h-1 was less efficient, resulting in a higher discard of high-quality seeds compared to lower flows. densities separator 12 1 2 1. h1. h1 h Twentyseven Twenty seven 3 factors null, (null 0.3, 03 0 (0.3 06 6 h1, , h-1) replicates B 37B5 20222023 2022 2023 (2022-202 season 13 40%, 40 40% 40%) rate 0. h- performance highquality (0. 37B 2022202 202 (2022-20 4 (0 202220 20 (2022-2 ( 20222 (2022- (2022 (202 (20 (2

ABSTRACT Introduction/framework/objectives Multiple Sclerosis has a reasonable prevalence and the diagnosis is generally made at working age, at a stage that is still demanding on a professional level, a time when there are also generally personal/family particularities that require some dedication. Furthermore, given the incidence, diversity and severity of the symptoms presented, limitations often arise that can seriously affect the ability to work or even lead to unemployment. It is then desirable that the members working in Occupational Health and Safety teams have some knowledge on the subject, in order to better guide their performance, safeguarding the interests of everyone involved. Methodology This is a Bibliographic Review, initiated through a search carried out in April 2023, in the databases “CINALH plus with full text, Medline with full text, Database of Abstracts of Reviews of Effects, Cochrane Central Register of Controlled Trials, Cochrane Database of Systematic Reviews, Cochrane Methodology Register, Nursing and Allied Health Collection: comprehensive, MedicLatina and RCAAP”. Content It is a demyelinating and autoimmune disease of the Central Nervous System; it is characterized by recurrent and intermittent episodes of inflammation, with generally progressive destruction of axonal myelin. In most cases there is a cycle of relapses and remissions and symptoms of varying intensity; the evolution is unpredictable. Causes autonomic, visual, motor and sensory symptoms; which makes independent daily living and the ability to work difficult; sometimes becoming debilitating. It is incurable and neurodegenerative. The severity varies depending on the neurological areas most affected. The function of myelin is to facilitate conduction at the level of axons; with changes in this, the electrical impulses that coordinate mental and physical functions become less effective. As myelin deteriorates, it is replaced by scars of abnormal tissue, with different consistency (stiffness, plaques), which further disrupts conduction. Injuries to the frontal and parietal lobes often result in cognitive and emotional changes; in the spinal cord, problems arise more easily in the lower limbs. Changes in the optic nerve and occipital lobe can cause visual problems. This is the neurological desease that causes most limitations in the young adult active population. Given the reasonably young age at which symptoms begin, there will be a decrease in quality of life, more significant than in other chronic diseases. Discussion and Conclusions Although the bibliography is not scarce, the emphasis in the vast majority of articles is not on Occupational Health or Safety. It would be relevant for some teams working in large companies with some prevalence, to evaluate the cases in detail, describing the main problems detected, proposed measures and their subsequent evaluation, in order to publish not only the path, but also the conclusions obtained, for greater dissemination of the subject.

RESUMO Introdução/enquadramento/objetivos A Esclerose Múltipla tem uma prevalência razoável e o diagnóstico faz-se geralmente em idade ativa, numa fase ainda exigente a nível profissional, altura essa onde geralmente também existem particularidades pessoais/familiares que necessitam de alguma dedicação. Para além disso, dada a incidência, diversidade e gravidade dos sintomas apresentados, com frequência surgem limitações que podem condicionar seriamente a capacidade de trabalho ou até levar ao desemprego. Será então desejável que os elementos a exercer em equipas de Saúde e Segurança Ocupacionais tenham alguns conhecimentos sobre o tema, de forma a melhor orientar o seu desempenho, salvaguardando os interesses de todos os envolvidos. Metodologia Trata-se de uma Revisão Bibliográfica, iniciada através de uma pesquisa realizada em abril de 2023, nas bases de dados “CINALH plus with full text, Medline with full text, Database of Abstracts of Reviews of Effects, Cochrane Central Register of Controlled Trials, Cochrane Database of Systematic Reviews, Cochrane Methodology Register, Nursing and Allied Health Collection: comprehensive, MedicLatina e RCAAP”. Conteúdo É uma doença desmielinizante e auto-imune do Sistema Nervoso Central; carateriza-se por episódios recorrentes e intermitentes de inflamação, com destruição de mielina axonal, geralmente progressiva. Na maioria dos casos existe um ciclo de relapsos e remissões e sintomas de intensidade oscilante; a evolução é imprevisível. Causa sintomas autonómicos, visuais, motores e sensoriais; o que dificulta a vida quotidiana independente e o trabalho, tornando-se por vezes debilitante. É incurável e neurodegenerativa. A gravidade varia com as áreas neurológicas mais atingidas. À medida que a mielina se detiora, ela é substituída por cicatrizes de tecido anormal, com diferente consistência (rigidez, placas), o que perturba ainda mais a condução. Lesões nos lóbulos frontal e parietal geralmente resultam em alterações cognitivas e emocionais; na espinal medula, mais facilmente surgem problemas nos membros inferiores. Alterações no nervo ótico e lobo occipital podem originar alterações visuais. Trata-se da doença neurológica que mais limitações causa na população ativa jovem adulta. Dada a idade razoavelmente jovem do início de sintomas, irá ocorrer diminuição da qualidade de vida, mais significativa que noutras doenças crónicas. Discussão e Conclusões Ainda que a bibliografia não seja escassa, a enfase da grande maioria dos artigos não é dada à Saúde ou Segurança Ocupacionais. Seria relevante que algumas equipas a exercer em empresas grandes e com alguma incidência, avaliassem com detalhe os casos, descrevendo os principais problemas detetados, medidas propostas e avaliação posterior das mesmas, de forma a publicar não só o caminho, mas também as conclusões obtidas, para maior divulgação do assunto.

ABSTRACT Introduction/framework/objectives: There have always been employers, managers and/or co-workers with less correct and disruptive behaviors, with possible consequences in terms of physical and emotional health, in addition to direct intervention in work parameters (such as performance, satisfaction, productivity and profit). Within this dimension there is a very wide variation between more subtle and possibly less serious situations, to the opposite. The aim of this review is to address the softer part of this spectrum and, possibly, more discreet and frequent, in order to provide Occupational Health and Safety Professionals with more weapons, to better guide the situation. Methodology: This is a Bibliographic Review, initiated through a search carried out in April 2023 in the databases “CINALH plus with full text, Medline with full text, Database of Abstracts of Reviews of Effects, Cochrane Central Register of Controlled Trials, Cochrane Database of Systematic Reviews, Cochrane Methodology Register, Nursing and Allied Health Collection: comprehensive, MedicLatina and RCAAP”. Content: Civility can be defined as tolerance, respect and concern for others; with the possibility of sharing and disagreeing in a polite and cooperative way, based on treating with dignity; which can mitigate the effects of workload on employees’ mental health. Incivility occurs when an individual violates respect for others by being rude and/or condescending, leading to disrespect, conflict and anxiety. In other words, it is a deviant behavior that is not very intense, violating the rules of good work conduct. This review also mentions data relating to possible classifications of Incivility, elements that can commit it, factors that increase or mitigate the risk of being a target of this phenomenon, professional areas most affected, some international statistics; as well as personal and work consequences and ways to mitigate the problem. Discussion and Conclusions: Addressing and drawing attention to Workplace Incivility will certainly make everyone involved more aware and capable of mitigating or eliminating it, contributing to the construction of healthier cultures and work environments (physically and emotionally); creating more competitive and profitable institutions. It would be interesting to see if, at a national level, there are employers who have already studied the topic inside (or intend to do so in the future), summarizing the respective incidences/prevalence of the different subtypes of uncivilized behavior, socio-demographic-professional characteristics of the aggressors and attacked workers, measures taken and their effectiveness, publishing this in a specialized magazine.

RESUMO Introdução/enquadramento/objetivos: Desde sempre que existiram empregadores, chefias e/ou colegas de trabalho com comportamentos menos corretos e perturbadores, com eventuais consequências a nível da saúde física e emocional, para além da interação com parâmetros laborais (como desempenho, satisfação, produtividade e lucro). Dentro desta dimensão existe uma variação muito ampla entre situações mais subtis e eventualmente menos graves, até o oposto. Pretende-se com esta revisão abordar a parte mais suave deste espetro e, eventualmente, mais discreta e frequente, de forma a dotar os Profissionais da Saúde e Segurança Ocupacionais de mais armas, para melhor orientarem a situação. Metodologia: Trata-se de uma Revisão Bibliográfica, iniciada através de uma pesquisa realizada em abril de 2023 nas bases de dados “CINALH plus with full text, Medline with full text, Database of Abstracts of Reviews of Effects, Cochrane Central Register of Controlled Trials, Cochrane Database of Systematic Reviews, Cochrane Methodology Register, Nursing and Allied Health Collection: comprehensive, MedicLatina e RCAAP”. Conteúdo: Civilidade pode ser definida como tolerância, respeito e preocupação pelos outros; com possibilidade de partilhar e discordar de uma forma educada, cooperando, baseada no trato com dignidade; podendo atenuar os efeitos da carga de trabalho na saúde mental dos funcionários. Incivilidade ocorre quando um indivíduo viola o respeito por terceiros, sendo rude e/ou condescendente, levando a um ambiente de conflito e ansiedade. Ou seja, é um comportamento desviante não muito intenso, mas violando as normas/condutas de trabalho. Nesta revisão são ainda mencionados dados relativos a eventuais classificações de Incivilidade, elementos que a podem cometer, fatores que potenciam ou atenuam o risco de ser alvo deste fenómeno, áreas profissionais mais atingidas e algumas estatísticas internacionais, consequências pessoais e laborais e forma de atenuar o problema. Discussão e Conclusões: Abordar e chamar a atenção para a Incivilidade Laboral certamente conseguirá que todos os envolvidos ficam mais atentos e capazes de a atenuar ou eliminar, contribuindo para a construção de culturas e ambientes de trabalho mais saudáveis (física e emocionalmente); criando instituições mais competitivas e lucrativas. Seria curioso perceber se a nível nacional existem empregadores que já tenham estudado o tema dentro de suas portas (ou pretendam fazê-lo futuramente), resumindo as respetivas incidências/prevalências dos diversos subtipos de comportamentos incivilizados, caraterísticas socio-demográfico-profissionais dos agressores e agredidos, medidas tomadas e eficácia das mesmas, divulgando tal em revista especializada.

Abstract The competitiveness of SMEs is relevant to analyze their development in the market, which increasingly requires better performance to remain relevant. Competitiveness must be analyzed comprehensively to have a better overview of these companies and know how they interact with their competitors. The objective of this article is to present an analysis of the level of competitiveness of SMEs in the municipality of Umán, Yucatán. The present work is with a quantitative and cross-sectional approach. In this research, the systemic competitiveness model was used, the study population was 95 companies with a sample of 77. The main findings of the work indicate that the companies studied have a high competitiveness index, where the quality assurance factor is one of the best evaluated, while the environmental management factor is one of those that obtained the lowest score.

Resumen La competitividad de las PyMEs resulta relevante para analizar su desarrollo en el mercado, el cual cada vez exige un mejor desempeño para que se mantengan vigentes. La competitividad debe ser analizada de forma integral para tener un mejor panorama de estas empresas y conocer cómo interactúan con sus competidores. El objetivo del presente artículo es presentar un análisis del nivel de competitividad de las PyMEs del municipio de Umán, Yucatán. El presente trabajo es con enfoque cuantitativo y de corte transversal. En esta investigación se empleó el modelo de la competitividad sistémica, la población de estudio fueron 95 empresas con una muestra de 77. Los principales hallazgos del trabajo indican que las empresas estudiadas presentan un alto índice de competitividad, donde el factor de aseguramiento de la calidad es uno de los mejores evaluados, mientras que el factor de la gestión ambiental es uno de los que obtuvieron menor puntaje

Abstract Open innovation proposes information exchanges between the company and external stakeholders to improve the results of innovation processes. In this work we adopt the open innovation approach to enhance a company’s innovation performance by implementing co-creation practices with customers. To do this, we rely on design thinking, a framework focusing on the relationship with end users, and adopt action research as a research methodology. The research is carried out in a service SME, characterised by being knowledge-intensive and offering innovative and customised services with high value added. We identify several co-creation practices and examine their degree of adoption by the company and prioritise those that should be implemented. For academics, this work contributes to increase the stock of knowledge on co-creation in the context of SMEs. The study offers valuable insights to practitioners into how an innovation framework that incorporates co-creation practices helps to improve the firm's innovation results, while presenting a methodology that facilitates collaboration with researchers on innovation projects.

Resumen La innovación abierta propone el intercambio de información entre la empresa y su entorno externo para mejorar los resultados de su proceso de innovación. En este trabajo adoptamos el enfoque de la innovación abierta para mejorar los resultados de innovación de una empresa mediante la aplicación de prácticas de co-creación con los clientes. Para ello, nos basamos en design thinking, un marco de trabajo centrado en la relación con el usuario final, y adoptamos la investigación-acción como metodología de investigación. La investigación se lleva a cabo en una PYME de servicios, caracterizada por ser intensiva en conocimiento y ofrecer servicios innovadores y personalizados de alto valor añadido. Se identifican una serie de prácticas de co-creación, se examina su grado de adopción por parte de la empresa y se priorizan las que deben ser implementadas. Este trabajo es de interés para el ámbito académico porque cubre brechas de investigación relacionadas con la co-creación en el contexto de una PYME y el uso de la metodología de investigación-acción en la gestión de la innovación. Para los profesionales, por una parte ofrece conocimientos sobre un nuevo marco de innovación que incorpora prácticas de co-creación para mejorar sus resultados, y por otra presenta una metodología que facilita la colaboración con investigadores en proyectos de innovación.

Summary: Bioestimulants such as chitosan in traditional agriculture have proven effective in promoting plant growth and development, as well as protecting them from diseases. However, in aquaponic production systems its effect is not documented, therefore the objective of the present work was to determine the effect of chitosan concentration (0, 500 and 1000 mg L-1) in three varieties (Great Lakes, Regina 500 and Red Rock) of lettuce (Latuca sativa L.), on production parameters in a circular aquaponics system. Using a completely randomized design with a 3×3 factorial arrangement, chitosan was applied by spraying at 10 and 45 days after transplantation. After the analysis of variance, the differences due to the variety were determined using the Tukey test and the effect of chitosan concentration through orthogonal polynomials, in addition to a correlation analysis and simple linear regression between the yield, height, number and length of the leaves. The results showed that the variables number of leaves, length of leaves and root, plant weight, plant height and yield increased as the dose of chitosan increased. The Red Rock variety outperformed the Regina 500 and Great Lakes varieties. No presence of insects or diseases was detected. It is concluded that chitosan favors the growth, development and yield of the lettuce plant in a circular aquaponic system, especially with doses of 1000 mg L-1 of chitosan, and that with respect to these same variables, the Red Rock variety surpasses to the Regina 500 and Great Lakes varieties.

Resumen: Los bioestimulantes como el quitosano en la agricultura tradicional han demostrado su eficacia para promover el crecimiento y desarrollo de las plantas, así como protegerlas de enfermedades. Sin embargo, en sistemas de producción acuapónicos su efecto no está documentado, por ello el objetivo del presente trabajo fue determinar el efecto de la concentración de quitosano (0, 500 y 1000 mg L-1) en tres variedades (Grandes Lagos, Regina 500 y Red Rock) de lechuga (Latuca sativa L.), sobre los parámetros de producción en un sistema circular de acuaponía. Utilizando un diseño completamente al azar con un arreglo factorial 3×3 el quitosano se aplicó mediante aspersión a los 10 y 45 días después del trasplante. Posterior al análisis de varianza, las diferencias debido a la variedad se determinaron utilizando la prueba de Tukey y, el efecto de la concentración de quitosano mediante polinomios ortogonales, además de un análisis de correlación y regresión lineal simple entre el rendimiento, altura, número y longitud de las hojas. Los resultados demostraron que las variables número de hojas, longitud de hojas y raíz, peso de planta, altura de planta y rendimiento, se incrementó conforme se aumentó la dosis de quitosano. La variedad Red Rock superó a las variedades Regina 500 y Grandes Lagos. No se detectó la presencia de insectos ni enfermedades. Se concluye que el quitosano favorece el crecimiento, desarrollo y rendimiento de la planta de lechuga en un sistema circular de acuaponía, sobre todo con dosis de 1000 mg L-1 de quitosano, y que respecto a estas mismas variables, la variedad Red Rock supera a las variedades Regina 500 y Grandes Lagos.

RESUMEN La presente investigación tuvo como objetivo analizar los efectos de la transformación digital en el sector contable y financiero en Ecuador. Para lograr este objetivo se establecieron tres objetivos específicos, que fueron: identificar los cambios que la transformación digital ha generado en los procesos contables y financieros en empresas ecuatorianas de diversos sectores industriales, analizar las percepciones de los contadores y financieros sobre la adopción de tecnologías digitales en sus tareas cotidianas y cómo afecta a su desempeño laboral, y evaluar la efectividad de las soluciones tecnológicas implementadas en el sector contable y financiero en Ecuador, en términos de eficiencia, reducción de costos y mejora en la toma de decisiones. Para llevar a cabo esta investigación se utilizó un diseño de investigación no experimental de tipo transversal y se aplicó un cuestionario a 150 contadores y financieros de diferentes empresas de Ecuador. Los resultados de la investigación indican que la transformación digital ha tenido un impacto positivo en el sector contable y financiero en Ecuador, ya que ha permitido una mayor eficiencia en los procesos, reducción de costos y mejora en la toma de decisiones. Asimismo, los contadores y financieros perciben que la adopción de tecnologías digitales en sus tareas cotidianas ha mejorado su desempeño laboral y les ha permitido enfocarse en tareas más estratégicas. En cuanto a las soluciones tecnológicas implementadas en el sector contable y financiero, se encontró que las más utilizadas son el software de contabilidad y finanzas, los sistemas de gestión de recursos empresariales y los sistemas de gestión documental. Estas soluciones han demostrado ser efectivas en la mejora de los procesos y en la reducción de costos.

ABSTRACT The objective of this research was to analyze the effects of digital transformation in the accounting and financial sector in Ecuador. To achieve this objective, three specific objectives were established, which were: to identify the changes that digital transformation has generated in accounting and financial processes in Ecuadorian companies from various industrial sectors, to analyze the perceptions of accountants and financiers about the adoption of digital technologies in their daily tasks and how it affects their work performance, and evaluate the effectiveness of the technological solutions implemented in the accounting and financial sector in Ecuador, in terms of efficiency, cost reduction and improvement in decision making. To carry out this research, a non-experimental cross-sectional research design was used and a questionnaire was applied to 150 accountants and financiers from different companies in Ecuador. The results of the research indicate that digital transformation has had a positive impact on the accounting and financial sector in Ecuador, since it has allowed greater efficiency in processes, cost reduction, and improved decision-making. Likewise, accountants and financiers perceive that the adoption of digital technologies in their daily tasks has improved their work performance and has allowed them to focus on more strategic tasks. Regarding the technological solutions implemented in the accounting and financial sector, it was found that the most used are accounting and finance software, business resource management systems and document management systems. These solutions have proven to be effective in improving processes and reducing costs.

Abstract: Smart Grids have revolutionized the electricity industry by enabling more efficient control and monitoring of the electricity supply, with a key component being smart meters (SM). These collect information on demand, energy, and harmonic distortion, among others, which must be stored and managed efficiently in a metering data management system (MDMS). The MDMS must ensure that a complete set of data is obtained for use in algorithms to ensure the reliability and quality of the power supply. To address the challenge of management the big data generated by SM, short, medium, and long-term measurement forecasting techniques have been proposed, highlighting the use of artificial intelligence such as Artificial Neural Networks (ANN) and Deep Learning (DL) methods due to their ability to adapt to different input and output variables with various time horizons. In addition, the influence of the diversity of Information and Communication Technologies (ICT) on the update time and data storage in the MDMS is highlighted. In this sense, this work aims to identify which ANN or DL architecture(s) could be more suitable for enterprise, survey, or research applications, demonstrating favorable performance metrics in different scenarios of sampling frequency and typical data update times in Smart Grids. This is relevant due to the need for MDMS to perform multivariate and multi-pass predictions in the short term to complete the information until the information is available or updated.

Resumen: Las Redes Eléctricas Inteligentes de Distribución (REID) han revolucionado la industria eléctrica al permitir un control y monitoreo más eficiente del suministro eléctrico, con un componente clave siendo los medidores inteligentes (SM). Estos recopilan información sobre la demanda, energía, distorsión armónica, entre otros, que deben ser almacenados y gestionados eficientemente en un sistema de gestión de datos de medición (MDMS). El MDMS debe garantizar la obtención de un conjunto completo de datos para su uso en algoritmos que aseguren la confiabilidad y calidad del suministro eléctrico. Para abordar el desafío de gestionar la gran cantidad de datos generados por los SM, se han propuesto diferentes técnicas de predicción de mediciones a corto, mediano y largo plazo, destacando el uso de inteligencia artificial como las Redes Neuronales Artificiales (ANN) y métodos de Aprendizaje Profundo (DL) debido a su capacidad de adaptación a diferentes variables de entrada y salida con diversos horizontes temporales. Además, se destaca la influencia de la diversidad de Tecnologías de la Información y Comunicación (TIC) en el tiempo de actualización y almacenamiento de datos en un MDMS. En este sentido, este trabajo tiene como objetivo identificar qué arquitectura o arquitecturas de ANN o DL podrían ser más adecuadas para aplicaciones en empresas, estudios o investigaciones, demostrando métricas de rendimiento favorables en diferentes escenarios de frecuencia de muestreo y tiempos de actualización de datos típicos en un REID. Esto es relevante debido a la necesidad del MDMS de realizar predicciones multivariables y multipaso a corto plazo para completar la información, hasta que la misma esté disponible o se actualice.

Resumen (Objetivo) Aunque el uso de vídeos de aula no es un tópico novedoso en la formación inicial del profesorado de educación matemática infantil, todavía hay preguntas de investigación sin resolver asociadas, sobre todo, a criterios para seleccionar y analizar vídeos desde un enfoque didáctico y disciplinar. Desde esta perspectiva, la finalidad del artículo es diseñar y validar una rúbrica que sirva para este doble propósito. (Metodología) A partir de un paradigma de investigación cualitativo, se ha seguido un proceso 4x3, es decir, un método secuenciado en cuatro fases con tres pasos en cada una de ellas: 1) revisión, 2) creación, 3) contraste y evaluación, y 4) mejora. (Resultados) La versión definitiva de la rúbrica, denominada R4, consta de 28 ítems organizados en cuatro dimensiones: 1) rol docente, sobre la función que tiene cada docente en el aula; 2) respuesta del alumnado infantil en la tarea, sobre su actuación; 3) relaciones matemáticas, sobre el tipo de matemática; 4) recursos, sobre la gestión y uso de recursos-materiales humanos. Para cada dimensión se considera diversas subdimensiones, en total 16. (Conclusiones) Se concluye que la rúbrica R4 aborda aspectos fundamentales (rol docente, respuesta del alumnado infantil, relaciones matemáticas y recursos) en la labor docente de una maestra o maestro de educación infantil, lo cual permite analizar la práctica docente de un modo holístico y fundamentado.

Resumo (Objetivo) Embora o uso de vídeos em sala de aula não seja um tópico novo na formação inicial de professores de matemática da educação infantil, ainda há questões de pesquisa não resolvidas associadas, sobretudo, aos critérios de seleção e análise de vídeos a partir de uma abordagem didática e disciplinar. A partir dessa perspectiva, o objetivo do artigo é projetar e validar uma rubrica que atenda a essa dupla finalidade. (Metodologia) Com base em um paradigma de pesquisa qualitativa, foi seguido um processo 4x3, ou seja, um método sequenciado em quatro fases com três etapas em cada uma delas: 1) revisão, 2) criação, 3) contraste e avaliação, e 4) aprimoramento. (Resultados) A versão final da rubrica, denominada R4, consiste em 28 itens organizados em quatro dimensões: 1) papel do professor, sobre a função que cada professor tem na sala de aula; 2) resposta dos alunos à tarefa, sobre seu desempenho; 3) relações matemáticas, sobre o tipo de matemática; 4) recursos, sobre o gerenciamento e o uso de recursos humanosmateriais. Para cada dimensão são consideradas diversas subdimensões, totalizando 16. (Conclusões) Conclui-se que a rubrica R4 aborda os principais aspectos (função do professor, resposta dos alunos da educação infantil, recursos e relações matemáticas) no trabalho de ensino de um professor da educação infantil, o que permite uma análise holística e informada da prática de ensino.

Abstract (Objective) Although the use of classroom videos is not a new topic in the initial training of early childhood mathematics education teachers, there are still unresolved research questions associated, above all, with criteria for selecting and analyzing these videos from both a didactic and disciplinary approach. From this perspective, the purpose of this article is to design and validate a rubric that serves this dual purpose. (Methodology) Based on a qualitative research paradigm, a 4x3 process has been followed, that is, a method sequenced in four phases with three steps in each one of them: 1) Review; 2) Creation; 3) Contrast and Evaluation; and 4) Improvement. (Results) The final version of the rubric, called R4, consists of 28 items organized in four dimensions: 1) Teaching role, on the role of the teacher in the classroom; 2) Response of children in the task to his/her performance; 3) Mathematical relations, on the type of mathematics; 4) and Resources, on the management and use of human resources and materials. For each dimension, several subdimensions are considered, 16 in total. (Conclusions) It is concluded that the R4 rubric addresses fundamental aspects (Teaching role, Childrens’ response, Mathematical relations and Resources) in the teaching work of an early childhood education teacher, which allows analyzing the teaching practice in a holistic and justified way.