A novel validation approach shows new, solid reasons why vertical jump height should not be used to predict leg power / Uma nova abordagem de validação acrescenta fortes razões para não usar a altura do salto vertical como um indicador de potência das pernas / Un novedoso enfoque de validación añade sólidas razones para no utilizar la altura del salto vertical como predictor de la potencia de piernas

Abstract Jump height continues to be widely used to predict power in humans. Individual progress is often monitored on the basis of estimated power, but prediction equations are based on group data. The objective of the study was to show that vertical jump performance (vJP) and mechanical power are poorly associated, particularly within individuals. Two experiments are presented. First, 52 physically active male college students performed five maximal vertical jumps each. Second, three young male participants performed 50 maximal jumps each. Participants rested for 1 minute between jumps. vJP was calculated from kinematic data as peak body center of mass (BCOM) minus standing BCOM; peak power (PEAKPWR) was calculated from the vertical ground reaction force registered by a force plate, and average power (MEANPWR) during propulsion from the change in potential energy of BCOM. Regression analyses were performed using standardized vJP scores as the predictor variable and standardized power scores as the resulting variables, expecting an identity function of y = x (intercept = 0, slope = 1) and R2 = 1. In experiment 1, the model for zPEAKPWR R2 = 0.9707 (p < 0.0001) but slope (0.3452) ≠ 1 (p < 0.0001). The model for zMEANPWR R2 = 0.9239 (p < 0.0001); nevertheless, slope (0.4257) ≠ 1 (p < 0.0001). In experiment 2, all individual models for zPEAKPWR and zMEANPWR resulted in poor associations (R2 ≤ 0.21) and slopes ≠ 1 (p≤0.001). In conclusion, regression analysis for individuals, and even for groups, confirms that vJP is a poor predictor of mechanical power.

Resumo A altura do salto ainda é amplamente usada para prever a potência em humanos. O progresso individual é frequentemente monitorado usando a estimativa de potência, mas as equações de previsão são baseadas em dados de grupo. O objetivo do estudo é demonstrar que a altura do salto vertical (ASv) e a potência mecânica têm uma correlação débil, principalmente em um mesmo indivíduo. São apresentados dois experimentos: primeiro, 52 estudantes universitários fisicamente ativos realizaram cinco saltos verticais máximos cada um; segundo, três participantes do sexo masculino realizaram 50 saltos máximos cada um. Os participantes descansaram por 1 minuto entre os saltos. A ASv foi calculada a partir de dados cinemáticos como a posição mais alta do centro de massa corporal (CMC) menos o CMC em pé; a potência de pico (PEAKPWR) foi calculada a partir da força de reação vertical registrada por uma plataforma de força e a potência média (MEANPWR) durante a propulsão a partir da mudança na energia potencial do CMC. As análises de regressão foram realizadas usando os escores da ASv padronizados como variável preditora e os escores de potência padronizados como variáveis de resultado, com a expectativa de obter uma função de identidade y = x (interceptação = 0, inclinação = 1) e R2 = 1. No experimento 1, o modelo para zPEAKPWR produziu R2 = 0,9707(p < 0,0001), mas a inclinação (0,3452) ≠ 1 (p = 8,7x10-15). O modelo para zMEANPWR apresentou R2 = 0,9239 (p < 0,0001); no entanto, a inclinação (0,4257) ≠ 1 (p = 1,15x10-5). No experimento 2, todos os modelos individuais para zPEAKPWR e zMEANPWR apresentaram associações débeis (R2 ≤ 0,21) e inclinações ≠ 1(p ≤ 0,001). Em conclusão, a análise de regressão para indivíduos e até mesmo para grupos confirma que a ASv é um indicador débil da potência mecânica.

Resumen La altura del salto se sigue usando ampliamente para predecir la potencia en seres humanos. El progreso individual, a menudo, se monitorea usando una estimación de la potencia, pero las ecuaciones de predicción se basan en datos grupales. El estudio pretende demostrar que la altura del salto vertical (ASv) y la potencia mecánica tienen una pobre correlación, particularmente en un mismo individuo. Se presentan dos experimentos; primero, 52 estudiantes universitarios físicamente activos ejecutaron cinco saltos verticales máximos cada uno; segundo, tres participantes masculinos ejecutaron 50 saltos máximos cada uno. Los participantes descansaron 1 minuto entre saltos. ASv se calculó a partir de los datos cinemáticos como posición más alta del centro de masa corporal (CDM) menos CDM de pie; la potencia pico (PEAKPWR) se calculó a partir de la fuerza vertical de reacción registrada por una plataforma de fuerza y la potencia promedio (MEANPWR) durante la propulsión a partir del cambio en la energía potencial del CDM. Se realizaron análisis de regresión usando puntajes estandarizados de ASv como la variable predictora y puntajes estandarizados de potencia como las variables resultantes, con la expectativa de obtener una función de identidad y = x (intercepto = 0, pendiente = 1) y R2 = 1. En el experimento 1, el modelo para zPEAKPWR arrojó R2 = 0.9707 (p <.0001) pero la pendiente (0.3452) ≠ 1 (p = 8.7x10-15). El modelo para zMEANPWR dio R2 = 0.9239 (p < .0001); sin embargo, la pendiente (0.4257) ≠ 1 (p = 1.15x10-5). En el experimento 2, todos los modelos individuales para zPEAKPWR y zMEANPWR arrojaron asociaciones débiles (R2 ≤ 0.21) y pendientes ≠ 1 (p ≤ .001). En conclusión, el análisis de regresión para individuos y aún para grupos confirma que la ASv es un pobre predictor de la potencia mecánica.

Cooperation and subject analysis of the research of ω-3 unsaturated fatty acids / 中华临床营养杂志

Objective To learn the latest progress in the research of ω-3 unsaturated fatty acids and provide references for the related investigator through visualized analysis of the research of ω-3 unsaturated fatty acids published in our country.Methods China Biology Medicine disc was searched by computer from the beginning until December 31,2017.Bibliographic Item Co-occurrence Mining System (BICOMS) was used to extract and summarize the data of age,author,organization,province and key words and to produce a co-occurrence matrix.NetDraw of Ucinet 6.0 was employed to draw the social network diagram of the author,organization,province and key words.And cluster analysis of the key words was performed by gCLUTO 2.0.Results A total of 1 165 studies involviug 30 provinces and cities,854 research units,3 789 authors and 1 016 significative key words were included.The cooperation of author,organization and province needed to be further strengthened.The study focused on 3 aspects:the effects of unsaturated fatty acids on apoptosis/lipid in mice/rats with related genes of diabetes/cardiovascular disease/coronary artery disease;meta-analysis of immunonutrition to improve tumor/inflammation/sepsis;effect of fish oil fat emulsion on interleukin/C reactive protein in pneumonia/lung injury.Conclusions The research of ω-3 unsaturated fatty acids develops rapidly in China,but it is mainly concentrated in a few centers of cooperation agencies.There is little cooperation among different provinces,cities,areas,and organizations and the research topics needs to be further expanded.

Problems facing the participation of academic libraries in reference service for decision-making and their solutions / 中华医学图书情报杂志

The major problems facing the participation of academic libraries in reference service for decision-making were described with suggestions proposed for their solution according to the practical experiences with participation of our library in reference service for decision-making in order to provide reference for the participation of other academic libraries in reference service for decision-making.

Bibliometric Analysis of Drug Therapy of Rheumatoid Arthritis Based on WoS Core Collection / 中国药房

OBJECTIVE:To investigate the development of drug therapy of rheumatoid arthritis,and to provide reference for the study of this field in China. METHODS:All literatures were retrieved during 2005-2016 using Web of ScienceTM(called"WoS"for short)core collection as database,"Rheumatoid arthritis""Rheumatoid-arthritis""Drug therapy""Medication"as subjects,set-ting literature type as"Article""Review". Bibliometric analysis method was used to list and analyze literatures about drug therapy of rheumatoid arthritis by annual number of articles published,source journals,subjects,agencies,authors and hot issues. RE-SULTS:A total of 2 528 literatures were retrieved from WoS core collection. The number of literatures showed an overall trend of growth.Those literatures came from more than 800 journals,among which top 10 journals published 689 literatures about drug ther-apy of rheumatoid arthritis(27.25%).A total of 18 subjects were involved,and the number of literatures in"Clinical medicine"was the largest,with 1 884 literatures(74.53%).A total of 3 431 research institutions were involved,and the largest number of literatures were issued by the Harvard University,with 68 literatures in total(2.69%). A total of 14 325 researchers were in-volved,and top 10 researchers published 240 literatures about drug therapy of rheumatoid arthritis(9.49%). The frequency of 25 keywords was greater than or equal to 100 times,that of 12 was greater than or equal to 150 times."Rheumatoid-arthritis"had the highest frequency(1 740 times). In basic scientific index(ESI)database,there were 35 literatures with high citation fre-quency. CONCLUSIONS:With the literatures of rheumatoid arthritis therapy increasing year by year,the focus of research in this field is focused on the diagnosis of rheumatoid arthritis and clinical efficacy. In China,no institution or author enters the world front rank in this research field.Attention should be paid to the clinical study on drug therapy of rheumatoid arthritis.

Bibliometric Analysis of Drug Therapy of Rheumatoid Arthritis Based on WoS Core Collection / 中国药房

OBJECTIVE:To investigate the development of drug therapy of rheumatoid arthritis,and to provide reference for the study of this field in China. METHODS:All literatures were retrieved during 2005-2016 using Web of ScienceTM(called"WoS"for short)core collection as database,"Rheumatoid arthritis""Rheumatoid-arthritis""Drug therapy""Medication"as subjects,set-ting literature type as"Article""Review". Bibliometric analysis method was used to list and analyze literatures about drug therapy of rheumatoid arthritis by annual number of articles published,source journals,subjects,agencies,authors and hot issues. RE-SULTS:A total of 2 528 literatures were retrieved from WoS core collection. The number of literatures showed an overall trend of growth.Those literatures came from more than 800 journals,among which top 10 journals published 689 literatures about drug ther-apy of rheumatoid arthritis(27.25%).A total of 18 subjects were involved,and the number of literatures in"Clinical medicine"was the largest,with 1 884 literatures(74.53%).A total of 3 431 research institutions were involved,and the largest number of literatures were issued by the Harvard University,with 68 literatures in total(2.69%). A total of 14 325 researchers were in-volved,and top 10 researchers published 240 literatures about drug therapy of rheumatoid arthritis(9.49%). The frequency of 25 keywords was greater than or equal to 100 times,that of 12 was greater than or equal to 150 times."Rheumatoid-arthritis"had the highest frequency(1 740 times). In basic scientific index(ESI)database,there were 35 literatures with high citation fre-quency. CONCLUSIONS:With the literatures of rheumatoid arthritis therapy increasing year by year,the focus of research in this field is focused on the diagnosis of rheumatoid arthritis and clinical efficacy. In China,no institution or author enters the world front rank in this research field.Attention should be paid to the clinical study on drug therapy of rheumatoid arthritis.

Problems facing the participation of academic libraries in reference service for decision-making and their solutions / 中华医学图书情报杂志

The major problems facing the participation of academic libraries in reference service for decision-making were described with suggestions proposed for their solution according to the practical experiences with participation of our library in reference service for decision-making in order to provide reference for the participation of other academic libraries in reference service for decision-making.

Satisfacción usuaria en dos centros hospitalarios de caaguazú durante el segundo semestre del año 2010 / User Satisfaction in two Hospitals in Caaguazú in the Second Semester of 2010

Esta investigación se efectuó con el objetivo de comprobar si existen diferencias en el grado de satisfacción de los usuarios de los servicios de dos centros hospitalarios de Caaguazú, utilizando un análisis descriptivo, comparativo y transversal, y teniendo en cuenta variables sociodemográficas y hospitalarias (Análisis Intra-sujeto e Inter-sujeto). La muestra constó de 192 mujeres y 58 hombres en la Institución A, y 234 mujeres y 16 hombres en la Institución B. Un total de 250 participantes en cada Centro. Para la selección se utilizó un muestreo intencional no probabilístico de participación voluntaria. Se registraron diferencias significativas en el grupo de Edad y Escolaridad en los factores "Infraestructura", "Calidad de la Atención", "Satisfacción del Usuario" en las Instituciones A y B respectivamente, encontrándose con alto nivel de satisfacción los Adultos Mayores y aquellos usuarios con un nivel de preparación primaria. También, se encontró diferencia significativa al nivel alfa 0,01 en el factor "Participación del Usuario" en la comparación entre ambas instituciones, donde los usuarios de la Institución A (2,78) están satisfechos y los de la Institución B (2,39) insatisfechos.

This research was conducted to find the difference in the degree of satisfaction of patients from two Caaguazú hospitals, using descriptive analysis and cross comparison and considering sociodemographic and hospital variables (Intra-subject and Inter-subject analysis). The sample consisted of 192 women and 58 men in Institution A, and 234 women and 16 men in Institution B, totaling 250 participants in each center. Intentional non-probabilistic voluntary participation was used to select the sample. There were significant differences in the groups Age and Education when analyzing the factors "Infrastructure" "Quality Care", "User Satisfaction" in Institutions A and B respectively. A high level of satisfaction was reported from the elderly and those patients with an education level of a primary school. Also, significant differences were found at the alpha 0.01 level with the factor "User Participation" in the comparison between the two institutions, where patients from Institution A (2,78) were satisfied and patients from Institution B (2,39) were unsatisfied.