Implementación de un SGSST para reducir la accidentabilidad laboral en la Empresa Prez Ingeniería Industrial SAC, Lima, 2022

La presente investigación lleva por título “Implementación de un SGSST para reducir la accidentabilidad laboral en la empresa PREZ Ingeniería Industrial SAC, Lima”, la empresa de estudio realiza trabajos estructurales en acero al carbono, mantenimiento preventivo y correctivo de maquinarias industriales, los principales clientes son empresas del sector minería, petrolera y gasoductos. Este trabajo de investigación se realizó mediante la metodología de investigación de tipo aplicada, es decir que la solución planteada se llevó a la práctica mediante la implementación del sistema de gestión de seguridad y salud en el trabajo. De la misma manera se realizó con un diseño experimental ya que se manipula una variable a fin de obtener resultados pre test y post test medibles y proceder a realizar una comparación entre ellos. Por su nivel tiende a ser explicativa, esto debido a que se investigó las causas y consecuencias de la problemática presentada en la empresa Prez Ingeniería Industrial esto reflejado en la prueba de hipótesis de las variables que nos permitió hacer predicciones. La población está representada por la cantidad de registros de accidentes e incidentes peligrosos ocasionados durante los 6 últimos meses del año 2021. Se recolecto datos a través de la técnica de observación y registros pasados de accidentes, los datos obtenidos se analizaron con el programa estadístico SPSS, trabajando con el método TStudent y obteniendo una reducción de accidentabilidad del 78.2%. En conclusión, se aceptó la hipótesis alterna generales, es decir que la Implementación del SGSST reduce el índice de accidentabilidad en la empresa Prez Ingeniería Industrial SAC

Assessment of interests and cognitive styles of learning in science in students 7th and 8th years of teaching basic and 1st and 2nd of teaching secondary in the province of Llanquihue

El interés por estudiar ciencia en nuestro país debe ser abordado bajo nuevos modelos didácticos curriculares, que estén relacionados con el entorno y con el desarrollo económico social de la región, de tal forma que los estudiantes se puedan ver más motivados y encuentren el sentido de vida que tiene la ciencia. Se evaluaron los intereses y estilos cognitivos de aprendizaje en ciencia en alumnos de séptimo y octavo Básico y primero y segundo año de Educación Media de la Provincia de Llanquihue, Región de los Lagos, Chile. La muestra estuvo compuesta por 80 alumnos seleccionados de un colegio Particular, uno Particular Subvencionado, uno de Educación General Básica Municipalizado y un colegio Técnico Profesional Municipalizado. Se evaluaron los intereses vocacionales a través del test de Kuder y los estilos de aprendizaje con el test de Honey –Alonso. Todos los colegios están sobre el 60% de actitud positiva hacia el aprendizaje de la ciencia, pero la contextualización no se ve inserta en el tratamiento de los contenidos.The interest for studying science in our country should considerate a new didactic approach and a new curricular model, related to the environment and to the regional social economical development, in order to motivate students and help them to find the sense of life through science. The samples utilized in this research were: a private school, a semi- private school, a primary public school and a public vocational school. The results show that 60% of students have a positive attitude towards the science learning. However, contextualization in the science teaching is not noticed

Assessment of learning outcomes in computing studies

The assessment of learning outcomes is a key concept in the European Credit Transfer and Accumulation System (ECTS) since credits are awarded when the assessment shows the competences which were aimed at have been developed at an appropriate level. This paper describes a study which was first part of the project of the Bologna Experts Team-Spain and then developed as an independent study. It was carried out with the overall goal to gain experience in the assessment of learning outcomes. More specifically it aimed at 1) designing procedures for the assessment of learning outcomes related to these compulsory generic competences; 2) testing some basic psychometric features that an assessment device with some consequences for the subjects being evaluated needs to prove; 3) testing different procedures of standard setting, and 4) using assessment results as orienting feedback to students and their tutors. The process of development of tests to carry out the assessment of learning outcomes related to these competences, as well as some basic features regarding their reliability and validity is described and first results on the comparison of results achieved at two academic levels, will also be described at a later stage

Assessment of problem solving in computing studies

The assessment of learning outcomes is a key concept in the European Credit Transfer and Accumulation System (ECTS) since credits are awarded when the assessment shows the competences which were aimed at have been developed at an appropriate level. This paper describes a study which was first part of the Bologna Experts Team-Spain project and then developed as an independent study. It was carried out with the overall goal to gain experience in the assessment of learning outcomes. More specifically it aimed at 1) designing procedures for the assessment of learning outcomes related to these compulsory generic competences; 2) testing some basic psychometric features that an assessment device with some consequences for the subjects being evaluated needs to prove; 3) testing different procedures of standard setting, and 4) using assessment results as orienting feedback to students and their tutors. The process of development of tests to carry out the assessment of learning outcomes is described as well as some basic features regarding their reliability and validity. First conclusions on the comparison of the results achieved at two academic levels are also presented

Photography-based taxonomy is inadequate, unnecessary, and potentially harmful for biological sciences

The question whether taxonomic descriptions naming new animal species without type specimen(s) deposited in collections should be accepted for publication by scientific journals and allowed by the Code has already been discussed in Zootaxa (Dubois & Nemésio 2007; Donegan 2008, 2009; Nemésio 2009a–b; Dubois 2009; Gentile & Snell 2009; Minelli 2009; Cianferoni & Bartolozzi 2016; Amorim et al. 2016). This question was again raised in a letter supported by 35 signatories published in the journal Nature (Pape et al. 2016) on 15 September 2016. On 25 September 2016, the following rebuttal (strictly limited to 300 words as per the editorial rules of Nature) was submitted to Nature, which on 18 October 2016 refused to publish it. As we think this problem is a very important one for zoological taxonomy, this text is published here exactly as submitted to Nature, followed by the list of the 493 taxonomists and collection-based researchers who signed it in the short time span from 20 September to 6 October 2016

Evaluación de los intereses y estilos cognitivos de aprendizaje en ciencia en alumnos de 7° y 8° año de enseñaza básica y 1° y 2° año de educación media de la provincia de Llanquihue

The interest for studying science in our country should considerate a new didactic approach and a new curricular model, related to the environment and to the regional social economical development, in order to motivate students and help them to find the sense of life through science. The samples utilized in this research were: a private school, a semi- private school, a primary public school and a public vocational school. The results show that 60% of students have a positive attitude towards the science learning. However, contextualization in the science teaching is not noticed.El interés por estudiar ciencia en nuestro país debe ser abordado bajo nuevos modelos didácticos curriculares, que estén relacionados con el entorno y con el desarrollo económico social de la región, de tal forma que los estudiantes se puedan ver más motivados y encuentren el sentido de vida que tiene la ciencia. Se evaluaron los intereses y estilos cognitivos de aprendizaje en ciencia en alumnos de séptimo y octavo Básico y primero y segundo año de Educación Media de la Provincia de Llanquihue, Región de los Lagos, Chile. La muestra estuvo compuesta por 80 alumnos seleccionados de un colegio Particular, uno Particular Subvencionado, uno de Educación General Básica Municipalizado y un colegio Técnico Profesional Municipalizado. Se evaluaron los intereses vocacionales a través del test de Kuder y los estilos de aprendizaje con el test de Honey -Alonso. Todos los colegios están sobre el 60% de actitud positiva hacia el aprendizaje de la ciencia, pero la contextualización no se ve inserta en el tratamiento de los contenidos

Molecular evidence of the avocado defense response to Fusarium kuroshium infection: a deep transcriptome analysis using RNA-Seq

Fusarium kuroshium is a novel member of the Ambrosia Fusarium Clade (AFC) that has been recognized as one of the symbionts of the invasive Kuroshio shot hole borer, an Asian ambrosia beetle. This complex is considered the causal agent of Fusarium dieback, a disease that has severely threatened natural forests, landscape trees, and avocado orchards in the last 8 years. Despite the interest in this species, the molecular responses of both the host and F. kuroshium during the infection process and disease establishment remain unknown. In this work, we established an in vitro pathosystem using Hass avocado stems inoculated with F. kuroshium to investigate differential gene expression at 1, 4, 7 and 14 days post-inoculation. RNA-seq technology allowed us to obtain data from both the plant and the fungus, and the sequences obtained from both organisms were analyzed independently. The pathosystem established was able to mimic Fusarium dieback symptoms, such as carbohydrate exudation, necrosis, and vascular tissue discoloration. The results provide interesting evidence regarding the genes that may play roles in the avocado defense response to Fusarium dieback disease. The avocado data set comprised a coding sequence collection of 51,379 UniGenes, from which 2,403 (4.67%) were identified as differentially expressed. The global expression analysis showed that F. kuroshium responsive UniGenes can be clustered into six groups according to their expression profiles. The biologically relevant functional categories that were identified included photosynthesis as well as responses to stress, hormones, abscisic acid, and water deprivation. Additionally, processes such as oxidation-reduction, organization and biogenesis of the cell wall and polysaccharide metabolism were detected. Moreover, we identified orthologues of nucleotide-binding leucine-rich receptors, and their possible action mode was analyzed. In F. kuroshium, we identified 57 differentially expressed genes. Interestingly, the alcohol metabolic process biological category had the highest number of upregulated genes, and the enzyme group in this category may play an important role in the mechanisms of secondary metabolite detoxification. Hydrolytic enzymes, such as endoglucanases and a pectate lyase, were also identified, as well as some proteases. In conclusion, our research was conducted mainly to explain how the vascular tissue of a recognized host of the ambrosia complex responds during F. kuroshium infection since Fusarium dieback is an ambrosia beetle-vectored disease and many variables facilitate its establishment

Evolution of the Atonishing Naica Giant Crystals in Chihuahua, Mexico

Calcium sulfate (CaSO4) is one of the most common evaporites found in the earth’s crust. It can be found as four main variations: gypsum (CaSO4·2H2O), bassanite (CaSO4 ·0.5H2O), soluble anhydrite, and insoluble anhydrite (CaSO4), being the key difference the hydration state of the sulfate mineral. Naica giant crystals’ growth starts from a supersaturated solution in a delicate thermodynamic balance close to equilibrium, where gypsum can form nanocrystals able to grow up to 11–12 m long. The growth rates are reported to be as slow as (1.4 ± 0.2) × 10−5 nm/s, taking thousands of years to form crystals with a unique smoothness and diaphaneity, which may or may not include solid or liquid inclusions. Conservation efforts can be traced back to other gypsum structures found prior to Naica’s. Furthermore, in the last two decades, several authors have explored the unique requirements in which these crystals grow, the characterization of their environment and microclimatic conditions, and the prediction of deterioration scenarios. We present a state-of-the-art review on the mentioned topics. Beyond the findings on the origin, in this work we present the current state and the foreseeable future of these astounding crystals.The support provided by CONACYT Project No. 183706, the proposals SSRL 3939, the ESRF HG-77, Elettra Sincrotrone-Trieste 20155328, as well as by the International Centre for Theoretical Physics (ICTP) are acknowledged. Special thanks to Manuel Reyes-Cortés, who provided some of the key research samples and supported their selection and analysis. The authors thank the cooperation of the management of the Peñoles company, the Desert Museum of Ciudad Delicias, Chihuahua, the Harvard Museum of Natural History, and the Faculty of Engineering of the Autonomous University of Chihuahua for providing essential specimens for the study. The authors thank the anonymous referees for their helpful suggestions