Archival science and changes in the paradigm

The dominant paradigm in Archival Science, thehistorical-technicist paradigm, has its origins with the French Revolution and raised from the social, economic, political, ideological and cultural changes that occur during the 19th and 20th centuries. During this last one and due specially to the technological revolution Archival Science reinforced its technical component and became autonomous in face of History, but the consolidation of the model, based on a custodial, technicist and documentalist perspective, is associated to a knowledge essentially empirical. By effect of the new conditions generated by Information Society, the dominant paradigm entered into a crisis and developed inside itself the factors which, unavoidably, will produce the paradigm shift. The new paradigm — thescientific-informational paradigm — conceives Archival Science as an applied discipline into the scope of Information Science and defines unequivocally its object of study — the archive, understood as aninformation system — and its scientific method of research. The method tends to find consolidation through quadripolar research dynamics, which is operated and continuously repeated within the field of knowledge itself, which implies a permanent interaction on four poles — epistemological, theoretical, technical and morphological.     

Archival science and changes in the paradigm

The dominant paradigm in Archival Science, thehistorical-technicist paradigm, has its origins with the French Revolution and raised from the social, economic, political, ideological and cultural changes that occur during the 19th and 20th centuries. During this last one and due specially to the technological revolution Archival Science reinforced its technical component and became autonomous in face of History, but the consolidation of the model, based on a custodial, technicist and documentalist perspective, is associated to a knowledge essentially empirical. By effect of the new conditions generated by Information Society, the dominant paradigm entered into a crisis and developed inside itself the factors which, unavoidably, will produce the paradigm shift. The new paradigm — thescientific-informational paradigm — conceives Archival Science as an applied discipline into the scope of Information Science and defines unequivocally its object of study — the archive, understood as aninformation system — and its scientific method of research. The method tends to find consolidation through quadripolar research dynamics, which is operated and continuously repeated within the field of knowledge itself, which implies a permanent interaction on four poles — epistemological, theoretical, technical and morphological.     

Maturity-associated variation in sport-specific skills of youth soccer players aged 13 – 15 years

The aim of this study was to estimate the contribution of experience, body size and maturity status to variation in sport-specific skills of adolescent soccer players. The participants were 69 players aged 13.2?–?15.1 years from three clubs that competed in the highest division for their age group. Height and body mass were measured and stage of pubic hair development was assessed at clinical examination. Years of experience in football was obtained at interview. Six football skill tests were administered: ball control with the body, ball control with the head, dribbling with a pass, dribbling speed, shooting accuracy and passing accuracy. Multiple linear regression analysis was used to estimate the relative contributions of age, stage of sexual maturity, height, body mass and years of formal training in soccer to the six skill tests. Age, experience, body size and stage of puberty contributed significantly but in different combinations to the variance in four of the six skill tests: dribbling with a pass (21%; age, stage of maturity), ball control with the head (14%; stage of maturity, height, body height × body mass interaction), ball control with the body (13%; stage of maturity, years of training) and shooting accuracy (8%; stage of maturity, height; borderline significance, P?=?0.06). There were no significant predictors for the tests of dribbling speed and passing accuracy. In conclusion, age, experience, body size and stage of puberty contributed relatively little to variation in performance in four of the six soccer-specific skill tests in adolescent footballers aged 13?–?15 years.     

Influence of surface roughness on the color of dental-resin composites

This study deals with the influence of surface roughness on the color of resin composites. Ten resin composites (microfilled, hybrid, and microhybrid) were each polished with 500-grit, 1 200-grit, 2 000-grit, and 4 000-grit SiC papers. The roughness parameter (R _a) was measured using a Plμ confocal microscope, and field-emission scanning electron microscope (Fe-SEM) images were used to investigate filler morphology. Color was measured using a spectroradiometer and a D65 standard illuminant (geometry diffuse/0° specular component excluded (SCE) mode). Surface roughness decreased with grit number and was not influenced by filler size or size distribution. A significant influence of R _a on lightness (L*) was found. Lightness increased with decreases in roughness, except for specimens that underwent polishing procedure 4 (PP4; 500-grit, 1 200-grit, 2 000-grit, and 4 000-grit SiC papers consecutively). Generally, it was found that surface roughness influenced the color of resin composites. The composites that underwent PP1 (500-grit SiC paper) exhibited significant differences in chroma (C*), hue (h°), and lightness (L*) compared to composites that underwent PP3 (500-grit, 1 200-grit, and 2 000-grit SiC papers consecutively) and PP4. Color difference (ΔE*) between the polishing procedures was within acceptability thresholds in dentistry.