Repositorio Ciencia Abierta Universidad del Bío-Bío

IN ORDER TO PROMOTE THE USE OF WOOD IN CONSTRUCTION, THIS STUDY AIMS TO IMPROVE THE PHYSICAL AND MECHANICAL PROPERTIES OF PLYWOOD AND LAMINATED VENEER LUMBER (LVL) MADE FROM RADIATA PINE, A SPECIES THAT EXHIBITS LOW PHYSICAL-MECHANICAL PERFORMANCE AND DURABILITY. THIS IMPROVEMENT IS PURSUED THROUGH THE REINFORCEMENT OF THESE PRODUCTS WITH ENGINEERED FIBERS AND ADHESIVES. THEREFORE, THE BEHAVIOR OF BASALT FIBER COMBINED WITH EPOXY AND POLYVINYL ACETATE ADHESIVES IS ANALYZED AT A LABORATORY SCALE, AND COMPARED TO CARBON FIBER, WHICH IS MORE COMMONLY USED FOR THIS PURPOSE BUT HAS DISADVANTAGES SUCH AS ITS HIGH COST. THE FOLLOWING TESTS WERE CONDUCTED IN ACCORDANCE WITH THE METHODOLOGIES DESCRIBED IN THE RESPECTIVE STANDARDS: SURFACE ROUGHNESS, SWELLING, STATIC BENDING, AND JANKA HARDNESS. THE RESULTS OBTAINED FROM THE REINFORCED BOARDS WERE COMPARED TO UNREINFORCED STANDARD BOARDS, SHOWING A SWELLING REDUCTION OF UP TO 100% IN LVL PANELS. IN TERMS OF STIFFNESS AND BENDING STRENGTH, THERE WAS A 49% INCREASE IN MOR IN PLYWOOD REINFORCED WITH CARBON FIBER AND EPOXY RESIN, AND A 30% INCREASE IN MOE AND 38% IN MOR IN LVL PANELS REINFORCED WITH CARBON FIBER AND EPOXY RESIN. ADDITIONALLY, A 35% AND 41% INCREASE IN JANKA HARDNESS WAS OBSERVED IN PLYWOOD REINFORCED WITH CARBON FIBER AND POLYVINYL ACETATE, AND IN LVL PANELS REINFORCED WITH CARBON FIBER AND EPOXY RESIN, RESPECTIVELY. THE STUDY LED TO IMPORTANT CONCLUSIONS REGARDING THE USE OF ENGINEERED FIBERS AS REINFORCEMENT. FIRSTLY, IT WAS CONFIRMED THAT REINFORCING THE BOARDS RESULTED IN IMPROVED PHYSICAL AND MECHANICAL PROPERTIES COMPARED TO UNREINFORCED PANELS. SECONDLY, IN SOME CASES, BASALT FIBER SHOWED EQUAL OR EVEN SUPERIOR PERFORMANCE WHEN COMPARED TO CARBON FIBER; THE RECOMMENDATION WILL DEPEND ON THE INTENDED USE OF THE PANEL.

THIS ARTICLE AIMS TO IDENTIFY THE MOST FREQUENTLY ADDRESSED SUSTAINABLE DEVELOPMENT GOALS (SDGS) IN SCIENTIFIC PRODUCTION A DECADE AFTER THEIR LAUNCH, WITH THE PURPOSE OF DETERMINING WHICH GOALS HAVE BEEN PRIORITIZED IN ACADEMIC RESEARCH. TO THIS END, THE WEB OF SCIENCE (CORE COLLECTION) DATABASE WAS USED, IDENTIFYING 12,817 ARTICLES. FROM THIS TOTAL, A SUBSAMPLE OF 4,829 ARTICLES WAS SELECTED, ON WHICH A BIBLIOMETRIC ANALYSIS WAS CONDUCTED USING VOSVIEWER SOFTWARE, COVERING THE PERIOD FROM 2015 TO 2024. THE RESULTS INDICATE THAT 96.65% OF THE ARTICLES ARE WRITTEN IN ENGLISH, AND THAT 9.09% ORIGINATE FROM CHINA. MOREOVER, IT WAS FOUND THAT THREE SDGS ACCOUNT FOR 87.9% OF THE 7,988 ARTICLES ANALYZED: QUALITY EDUCATION (44.7%), GENDER EQUALITY (26.10%), AND CLIMATE ACTION (17.1%)-WHICH REPRESENT THE MAIN RESEARCH PRIORITIES. IT IS CONCLUDED THAT, ALTHOUGH THE SDGS ARE INTERRELATED, SOME RECEIVE SIGNIFICANTLY MORE ATTENTION FROM THE ACADEMIC COMMUNITY, REVEALING A LACK OF RESEARCH ON OTHER GOALS. THIS HIGHLIGHTS THE NEED TO STRENGTHEN RESEARCH ON LESS-EXPLORED SDGS TO CONTRIBUTE MORE EQUITABLY TO THE CHALLENGES PROPOSED BY THE UNITED NATIONS AND THE GLOBAL COMMUNITY.

THE OBJECTIVE OF THIS STUDY WAS TO EXAMINE THE PERCEPTION OF A GROUP OF CHILEAN STUDENTS REGARDING THE DIFFERENT TYPES OF WRITTEN CORRECTIVE FEEDBACK DELIVERED BY THE TEACHER IN THEIR ACADEMIC WRITINGS IN ENGLISH. THE TYPE OF STUDY USED CORRESPONDED TO A DESCRIPTIVE CORRELATIONAL METHOD. THE SAMPLE CONSISTED OF 31 THIRD-YEAR STUDENTS FROM A CHILEAN PUBLIC UNIVERSITY AND THE ANALYZED CORPUS COMPRISED 15 ABSTRACTS WRITTEN IN ENGLISH. THE RESULTS INDICATED THAT THE STUDENTS SHOWED A POSITIVE PERCEPTION TOWARDS DIRECT WRITTEN CORRECTIVE FEEDBACK. IN ADDITION, A FAVORABLE REACTION IS OBSERVED BY THE STUDENTS FOR THE WRITTEN CORRECTIVE FEEDBACK. ON THE OTHER HAND, THE RESULTS ALSO SHOWED THAT THERE IS A RELATIONSHIP BETWEEN PERFORMANCE AND SOME TYPES OF FEEDBACK.

SOCIAL EATING OR COMMUNAL DINING IS AN ACTIVITY THAT TRANSCENDS DIETARY AND NUTRITIONAL CONCERNS THROUGHOUT ALL STAGES OF LIFE, ENABLING OLDER ADULTS TO STRENGTHEN SOCIAL BONDS, TRANSMIT FOOD-RELATED KNOWLEDGE, AND CONTRIBUTE TO OVERALL BIOPSYCHOSOCIAL WELL-BEING. IN ORDER TO PROVIDE AN ANALYTICAL POINT OF VIEW ON COMMENSALITY AND ITS FUTURE FOR OLDER PEOPLE, AN OVERVIEW OF THE SUBJECT IS PRESENTED FROM A SOCIO-HEALTH APPROACH, BEGINNING WITH A CONCEPTUALISATION OF THE ROLE AND IMPORTANCE OF COMMENSALITY, REFLECTING ON THE REALITY OF EATING TOGETHER TODAY AND LOOKING IN DEPTH, AMONG OTHER ASPECTS, AT THE INFLUENCE THAT TECHNOLOGIES AND GLOBALISATION WILL HAVE ON THE FUTURE OF EATING TOGETHER. IT IS CONCLUDED THAT THE FUTURE OF EATING TOGETHER FOR THE ELDERLY IS IN LINE WITH OTHER STAGES OF THE LIFE COURSE, AND THAT THIS ACTION CAN BE VISUALISED FOR CLINICAL OR COMMUNITY HEALTH CARE.