Repositorio Ciencia Abierta Universidad del Bío-Bío

TOFU FROM SIX DIFFERENT LANDRACES OF CHILEAN COMMON BEANS (ARAUCANO, CIMARR & OACUTE;N, MAGNUM, PEUMO, SAPITO, AND TORTOLA) WAS PREPARED AND ANALYZED FOR PROXIMATE AND LIPID COMPOSITION, ANTIOXIDANT CAPACITY, AND PHENOLIC CONTENT. TOFU HAS HIGHER PROTEIN AND LIPID CONTENT, LOWER CARBOHYDRATE AND PHENOLIC CONTENT, AND SHOWS ANTIOXIDANT CAPACITY. THE HIGHEST TOTAL PROTEIN WAS FOUND FOR TOFU PREPARED FROM CIMARR & OACUTE;N AND SAPITO BEANS. THE MAIN PHENOLICS IN THE SECONDARY METABOLITE-ENRICHED EXTRACT OF THE TOFU WERE KAEMPFEROL 3-O-GLUCOSIDE AND KAEMPFEROL. NUCLEAR MAGNETIC RESONANCE (NMR) ANALYSES SHOWED THAT MOST LIPIDS FROM THE BEANS AND TOFU WERE UNSATURATED FATTY ACIDS TRIGLYCERIDES.

ESTE LIBRO RECUPERA Y PUBLICA POR PRIMERA VEZ EL EXPEDIENTE TÉCNICO DEL PLAN REGULADOR DE CONCEPCIÓN 1960?1980, ELABORADO POR EMILIO DUHART Y ROBERTO GOYCOOLEA: UNA OBRA CLAVE EN LA HISTORIA DEL URBANISMO MODERNO EN CHILE QUE, HASTA AHORA, PERMANECÍA DISPERSA E INACCESIBLE. LA RECONSTRUCCIÓN DE SUS 36 LÁMINAS, RESULTADO DEL TRABAJO SISTEMÁTICO DE CRISTIÁN BERRÍOS Y DEL ARCHIVO RESGUARDADO POR SERGIO BAERISWYL, OFRECE UNA MIRADA INÉDITA SOBRE EL PENSAMIENTO URBANO DE DUHART. CON UNA INTRODUCCIÓN DE FERNANDO PÉREZ OYARZUN, EL VOLUMEN REAFIRMA LA VIGENCIA DEL URBANISMO COMO PROYECTO MORFOLÓGICO, AL TIEMPO QUE RECONOCE A DUHART COMO UNO DE LOS GRANDES MAESTROS DE LA ARQUITECTURA CHILENA. MÁS QUE UNA COMPILACIÓN DOCUMENTAL, ESTA PUBLICACIÓN INVITA A REDESCUBRIR UNA CIUDAD CONCEBIDA COMO TOTALIDAD Y A VALORAR EL URBANISMO COMO FORMA DE CONOCIMIENTO PROYECTUAL. ARCHIVO FACSIMILAR, HERRAMIENTA DE ESTUDIO Y HOMENAJE, ESTE LIBRO OFRECE UNA BASE CONCRETA PARA PENSAR EL FUTURO DE NUESTRAS CIUDADES.

THE WOOD MANUFACTURING INDUSTRY INCREASINGLY REQUIRES AUTOMATED AND INTELLIGENT SYSTEMS FOR DEFECT DETECTION TO ENSURE CONSISTENT AND RELIABLE QUALITY CONTROL. TRADITIONALLY, THIS PROCESS HAS RELIED ON VISUAL INSPECTION BY HUMAN OPERATORS, WHICH INTRODUCES VARIABILITY AND LIMITS PERFORMANCE. THIS STUDY ADDRESSES THIS CHALLENGE BY EVALUATING CONVOLUTIONAL NEURAL NETWORKS FOR AUTOMATIC DEFECT CLASSIFICATION IN MELAMINE-FACED BOARDS. MULTISPECTRAL IMAGES IN THE VISIBLE (VIS) AND NEAR-INFRARED (NIR) BANDS WERE CAPTURED UNDER REAL PRODUCTION CONDITIONS USING AN INDUSTRIAL IMAGING SYSTEM. THE RESIDUAL NETWORK 18 AND VISUAL GEOMETRY GROUP 16 MODELS WERE TESTED ON THE DATASET AND ACHIEVED ACCURACY LEVELS COMPARABLE TO THOSE OF EXPERT HUMAN INSPECTORS. THE PROPOSED METHOD CONSISTENTLY REACHED OVER 92% ACCURACY ACROSS ALL CLASSIFICATION TASKS, INDICATING ITS PRACTICAL POTENTIAL FOR INDUSTRIAL QUALITY CONTROL APPLICATIONS.

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.