Effects of discontinued endurance methods on VO2max in judokas

Este estudio tuvo como objetivo investigar el efecto de dos diferentes planes de entrenamiento de resistencia basados en la metodología discontinua (intermitente e interválica), sobre el VO2Máx de atletas Antioqueños de Judo de rendimiento. Para ello, 21 Judokas de la Selección Antioqueña pertenecientes a la categoría Senior (20,43±4,18 años), fueron distribuidos aleatoriamente en tres grupos, dos grupos experimentales y un grupo control. Ambos grupos experimentales entrenaron la resistencia durante 4 semanas con 4 estímulos por semana, uno de los grupos experimentales basó su entrenamiento en el método interválico y el otro en el intermitente. Por su parte, el grupo control no realizó ningún tipo de entrenamiento de la resistencia. No se hallaron diferencias significativas entre pretest y postest de ninguno de los grupos ni experimentales ni el de grupo control (p>0,05). Se concluyó que el entrenamiento de la resistencia basado en métodos discontinuos no produjo diferencias significativas en el VO2Máx

Efectos de los métodos discontinuos de resistencia sobre VO2 máx de judokas

The aim of this study was to investigate the effect of two different endurance training protocols based on discontinuous methodology (intermittent and interval), on the VO2Peakof Antioquia's top Judo athletes. To do this, 21 judokas of Antioquia’s judo team, belonging to the category of Major (20.43±4.18 years) were randomized into two experimental groups and a control group. Both experimental groups were trained in endurance for 4 weeks with 4 weekly stimuli, one of the experimental groups was trained based on the interval training method, and the other was trained based on the intermittent method. Meanwhile, the control group made no endurance training.No significant differences between pretest and posttest of both experimental groups, (intermittent and interval training protocols), nor in the control group were found (p> 0.05). It was concluded that the endurance training protocols based on discontinuous methodology, produced no significant difference in VO2Peakof Antioquia's top Judo athletes.Este estudio tuvo como objetivo investigar el efecto de dos diferentes planes de entrenamiento de resistencia basados en la metodología discontinua (intermitente e interválica), sobre el VO2Máx de atletas Antioqueños de Judo de rendimiento.Para ello, 21 Judokas de la Selección Antioqueña pertenecientes a la categoría Senior (20,43±4,18 años), fueron distribuidos aleatoriamente en tres grupos, dos grupos experimentales y un grupo control. Ambos grupos experimentales entrenaron la resistencia durante 4 semanas con 4 estímulos por semana, uno de los grupos experimentales basó su entrenamiento en el método interválico y el otro en el intermitente. Por su parte, el grupo control no realizó ningún tipo de entrenamiento de la resistencia.             No se hallaron diferencias significativas entre pretest y postest de ninguno de los grupos ni experimentales ni el de grupo control (p>0,05). Se concluyó que el entrenamiento de la resistencia basado en métodos discontinuos no produjo diferencias significativas en el VO2Máx.

Considering neighborhood effects improves individual dbh growth models for natural mixed-species forests in Mexico

International audienceAbstractKey messageMore accurate diameter at breast height (dbh)-growth models are needed for developing management tools for mixed-species forests in Mexico. Individual distance-dependent dbh growth models that quantify local neighborhood effects have been developed for four species groups in such forests. The performance of the models is improved by distinguishing between inter- and intraspecific group competitions.ContextThe management of mixed-species forests in the northwest of Durango, Mexico, is mainly based on the selection method. Understanding the interspecific and intraspecific competition is critical to developing management tools for such mixed-species forests.AimsAn individual-based distance-dependent modeling approach was used to model the growth of dbh and to evaluate neighborhood effects for four species groups in Mexican mixed-species stands.MethodsTwenty-two species were classified into four groups: Pinus (seven species), other conifers (three species), other broadleaves (four species), and Quercus (eight species). Four methods were used to select neighboring trees and 12 competition indices (CIs) were calculated. Comparisons of the neighboring trees selection methods and CIs and tests of assumptions about neighborhood effects were conducted.ResultsIntra-species-group competition significantly reduced diameter growth for all species groups, except for the Quercus group. The Pinus, other conifers, and Quercus groups had significant and negative neighborhood effects on the other broadleaves species group, and not vice versa. The Quercus group also had negative neighborhood effect on the Pinus and other conifers species groups, and not vice versa. The Pinus and other conifers species groups had negative neighborhood effects on each other. All fitted age-independent dbh growth models showed a good of fit to the data (adjusted coefficient of determination larger than 0.977).ConclusionThe growth models can be used to predict dbh growth for species groups and competition in mixed-species stand from Durango, Mexico

Feeding habits of the South Pacific hake, Merluccius gayi, in Ecuador, Tropical Eastern Pacific Ocean

The South Pacific hake, Merluccius gayi, is an ecologically and economically important species in Ecuador.However, studies regarding its feeding habits remain scarce. This study aimed to characterize the food andfeeding habits of M. gayi in the Ecuadorian Pacific Ocean by sex, sexual maturity stages, size classes, and years.Hakes obtained (n = 2993) from industrial fishing (captured with seine nets) were analyzed from September 2013to December 2014. Their diet was composed of 27 prey species. The most important prey was the euphausiidNyctiphanes simplex (52%) and the same hake species (M. gayi; 31%) according to the prey-specific indexof relative importance (%PSIRI), making this species a cannibal predator. Results show no significant dietarydifferences between female and male hakes or immature and mature males, but found differences betweenimmature and mature females and individuals from four size classes and hake between 2013 and 2014.According to Levin’s Index, the species showed a low trophic niche breadth (Bi = 0.03), making it a selectivespecialist mesopredator with high specialization. The trophic overlap analysis based on Jaccard’s index by sexwas low (J = 0.23) for indetermined individuals, moderate (J = 0.59) for males and females, and high (J = 0.78)for immature females and males; moderate values were noted for size classes (J  =  0.42-0.63) and low foryears (J = 0.31). Based on the Cortés index, the trophic level totaled (TLk = 3.22), indicating that this species isa primary and secondary carnivore mesopredator. This information supports the understanding of the relationsbetween predators and prey and the flow of nutrients and energy in marine ecosystems, which serve as a basefor ecosystemic fishing management

Prevalence of colonizing bacteria and their association with primary bacteremias in hemodialysis of a university hospital

to be from 2.5 to 5.5 cases per 1,000 catheter-day. the clinical impact is relevant and increases the cost of the HD Unit. Methods: The present study is the irst of 2 phases. It was conducted from January to December of 2012, and included all patients and nurses who were in the HD Unit. The prevalence of Gramnegative bacilli (GNB) and methicillin-resistant Staphylococcus aureus (MrSA) colonizing the nasal passages and the skin is described. Also, phenotypic association was sought by genus, species and sensitivities between colonizing bacterial strains and blood cultures with GNB and MRSA. Results: the study included 70 patients and 10 nurses. the prevalence of nasal colonization in patients by GNB was 9% and 6% in the pericatheter, and no nursing GNB colonization was discovered. The prevalence of MRSA nasal colonization was 19% and 6% in the pericatheter for patients and in the nurses the nasal colonization was 50% and 10% in the hands. We identiied 29 cases of primary bacteremia. The primary bacteremia rate is 1.5 per 1,000 catheter-day or 0.4 episodes per patient per year. Conclusion: We demonstrated a high prevalence of MrSA colonization in patients and nurses in the HD Unit. No relationship was found between primary bacteremia by GNB and patients and nurses’ bacteria colonization by the phenotypic comparison

Pattern recognition applying LDA and LR to optoelectronic signals of optical scanning systems

[ES] Este artículo da seguimiento a previas experimentaciones actualmente publicadas acerca de la minimización de ruido ópticoeléctrico en los sistemas de barrido óptico OSS (en inglés, Optical Scanning Systems), implementando técnicas computacionales para el reconocimiento de los patrones que se generan de cada fuente de referencia y que son utilizadas para indicar una coordenada que el OSS monitoreará. Técnicas como análisis linear discriminante LDA (en inglés, Linear Discriminant Analysis) y regresión lineal LR (en inglés, Linear Regression) fueron implementadas para discriminar las señales causadas por otras fuentes distintas a las de referencia. Para aumentar la eficiencia de estos modelos fueron implementados codificación predictiva lineal LPC (en inglés, Linear Predictive Coding) y Cuantiles como extractores de características. Los resultados fueron alentadores con tasas de reconocimiento mayores al 91.2 %, alcanzando en algunos casos una exactitud del 100 %.[EN] This paper is a follow-up to previous researches already published regarding the minimization of optical-electrical noise in optical scanning systems OSS, by the implementation of computational techniques for pattern recognition generated by each reference source used to indicate a coordinate that the OSS will be monitoring. Techniques such as linear discriminant analysis LDA and linear regression LR were implemented in order to discriminate the signals caused by other sources different to the references. In order to enhance the efficiency of these models was implemented linear predictive coding LPC and quantiles as features extractors. The results were encouraging with rates of recognition greater than 91.2 %, reaching in some cases an accuracy of 100 %.Miranda-Vega, JE.; Rivas-López, M.; Flores-Fuentes, W.; Sergiyenko, O.; Lindner, L.; Rodríguez-Quiñonez, JC. (2020). Reconocimiento de patrones aplicando LDA y LR a señales optoelectrónicas de sistemas de barrido óptico. Revista Iberoamericana de Automática e Informática industrial. 17(4):401-411. https://doi.org/10.4995/riai.2020.12385OJS401411174Brooks, D. R., Mims III, F. M., 2001. Development of an inexpensive handheld led-based sun photometer for the globe program. Journal of Geophysical Research: Atmospheres 106 (D5), 4733-4740. https://doi.org/10.1029/2000JD900545Cervantes, J., Taltempa, J., Lamont, F. G., Castilla, J. S. R., Rendon, A. Y., Jali- li, L. D., 2017. Análisis comparativo de las técnicas utilizadas en un sistema de reconocimiento de hojas de planta. Revista Iberoamericana de Automática e Informática industrial 14 (1), 104-114. https://doi.org/10.1016/j.riai.2016.09.005Cheng, P., John, W., Zheng, W., 2002. Large structure health dynamic monito- ring using gps technology. In: FIG XXII International Congress, Washing- ton, DC USA. pp. 1-10.Dave, N., 2013. Feature extraction methods lpc, plp and mfcc in speech recog- nition. International journal for advance research in engineering and techno- logy 1 (6), 1-4.Di Sante, R., 2015. Fibre optic sensors for structural health monitoring of aircraft composite structures: Recent advances and applications. Sensors 15 (8), 18666-18713. https://www.mdpi.com/1424-8220/15/8/18666 , https://doi.org/10.3390/s150818666Doebling, S., Farrar, C., Prime, M., Shevitz, D., 5 1996. Damage identification and health monitoring of structural and mechanical systems from changes in their vibration characteristics: A literature review. Report. https://doi.org/10.2172/249299Feng, D., Feng, M. Q., 2017. Experimental validation of cost-effective vision- based structural health monitoring. Mechanical Systems and Signal Processing 88, 199-211. https://doi.org/10.1016/j.ymssp.2016.11.021Flores-Fuentes, W., López, M., Sergiyenko, O., González-Navarro, F. F., Rivera-Castillo, J., Hernandez-Balbuena, D., Rodríguez-Quiñonez, J., 2014. Combined application of power spectrum centroid and support vector ma- chines for measurement improvement in optical scanning systems. Signal Processing 98, 37-51. https://doi.org/10.1016/j.sigpro.2013.11.008Flores-Fuentes, W., Miranda-Vega, J. E., Rivas-López, M., Sergiyenko, O., Rodríguez-Quiñonez, J. C., Lindner, L., 2018. Comparison between different types of sensors used in the real operational environment based on optical scanning system. Sensors 18 (6). https://doi.org/10.3390/s18061684Jayalakshmi, T., Santhakumaran, A., 2011. Statistical normalization and back propagation for classification. International Journal of Computer Theory and Engineering 3 (1), 1793-8201. https://doi.org/10.7763/IJCTE.2011.V3.288Jo, H., Sim, S.-H., Tatkowski, A., Spencer Jr, B., Nelson, M. E., 2013. Feasibility of displacement monitoring using low-cost gps receivers. Structural Control and Health Monitoring 20 (9), 1240-1254. https://doi.org/10.1002/stc.1532Jung, H. K., Park, G., 2018. Integrating passive-and active-sensing techniques using an l-shaped sensor array for impact and damage localization. Journal of Intelligent Material Systems and Structures 29 (17), 3436-3443. https://doi.org/10.1177/1045389X17733059Lindner, L., Sergiyenko, O., Rodríguez-Quiñonez, J. C., Rivas-Lopez, M., Hernandez-Balbuena, D., Flores-Fuentes, W., Murrieta-Rico, F. N., Tyrsa, V., 2016. Mobile robot vision system using continuous laser scanning for industrial application. Industrial Robot: An International Journal. https://doi.org/10.1108/IR-01-2016-0048Mims, F. M., Dec 2000. Solar radiometer with light-emitting diodes as spectrally-selective detectors. Appl. Opt. 39 (34), 6517-6518. http://ao.osa.org/abstract.cfm?URI=ao-39-34-6517, https://doi.org/10.1364/AO.39.006517Miranda-Vega, J. E., Rivas-Lopez, M., Flores-Fuentes, W., Sergiyenko, O., Lindner, L., Rodríguez-Quiñonez, J. C., 2019. Implementación digital de filtros fir para la minimización del ruido óptico y optoelectrónico de un sistema de barrido óptico. Revista Iberoamericana de Automática e Informática industrial 16, 344-357. https://doi.org/10.4995/riai.2019.10210Rivera-Castillo, J., Flores-Fuentes, W., Rivas-Lopez, M., Sergiyenko, O., Gonzalez-Navarro, F. F., Rodríguez-Quiñonez, J. C., Hernandez-Balbuena, D., Lindner, L., Básaca-Preciado, L. C., 2017. Experimental image and range scanner datasets fusion in shm for displacement detection. Structural Control and Health Monitoring 24 (10), e1967. https://doi.org/10.1002/stc.1967Sergiyenko, O., Hernandez, W., Tyrsa, V., Cruz, L. F. D., Starostenko, O., Peña-Cabrera, M., 2009. Remote sensor for spatial measurements by using optical scanning. Sensors 9 (7), 5477-5492. https://doi.org/10.3390/s90705477Van der Auweraer, H., Peeters, B., 2003. Sensors and systems for structural health monitoring. Journal of Structural Control 10(2), 117-125. https://doi.org/10.1002/stc.196710.1002/stc.21X.Ba, Q.Pan, B.Ju, Z.Feng, 2017. Ultrafast displacement actuation of piezo- electric stacks with time-sequence. IEEE Transactions on Industrial Electronics 64, 2955-2961. https://doi.org/10.1002/stc.196710.1109/TIE.2016.263111

Relación entre la diversidad pecuaria y la seguridad alimentaria de pequeños productores agropecuarios en Guatemala

Una gran parte de la población mundial depende de la agricultura para su subsistencia y, por este motivo, la misma juega un papel importante en la lucha contra la pobreza y la subnutrición. Numerosos estudios han confirmado la importancia de la variedad de cultivos para la seguridad y diversidad alimentaria de pequeños productores; sin embargo, se ha analizado poco la relación entre la diversidad pecuaria y la seguridadalimentaria. Esta investigación tiene como objetivo examinar el impacto de la diversidad pecuaria en la seguridad alimentaria de pequeños productores agropecuarios, con las metas específicas de: 1) determinar qué índice de diversidad ecológica sería más apropiado para medir la diversidad pecuaria de pequeños productores agropecuarios; 2) establecer si hay relación entre esta medida de diversidad y el estado de seguridad alimentaria del hogar;  y 3) explorar la relación entre la diversidad adentro y entre varios grupos funcionales de animales y la seguridad alimentaria del hogar.Este estudio transversal utilizó datos de encuestas de hogares de pequeños productores agropecuarios de Guatemala, del 2011 (n=2577). Se evaluaron varios índices de diversidad pecuaria y se analizó, con el uso del modelo de enlaces acumulativos, su asociación con el estado de seguridad alimentaria del hogar. El índice de diversidad de Shannon se identificó como el índice más apropiado para representar la diversidad pecuaria de pequeños productores. Una mayor diversidad pecuaria en general, así como adentro de y entre varios grupos funcionales de animales pecuarios, se asociaron auna mejor seguridad alimentaria

Glucose levels as a mediator of the detrimental effect of abdominal obesity on relative handgrip strength in older adults

Excess central adiposity accelerates the decline of muscle strength in older people. Additionally, hyperglycemia, independent of associated comorbidities, is related to the loss of muscle mass and strength, and contributes to functional impairment in older adults. We studied the mediation effect of glucose levels, in the relationship between abdominal obesity and relative handgrip strength (HGS). A total of 1571 participants (60.0% women, mean age 69.1 ± 7.0 years) from 86 municipalities were selected following a multistage area probability sampling design. Measurements included demographic and anthropometric/adiposity markers (weight, height, body mass index, and waist circumference). HGS was measured using a digital dynamometer for three sets and the mean value was recorded. The values were normalized to body weight (relative HGS). Fasting glucose was analyzed by enzymatic colorimetric methods. Mediation analyses were performed to identify associations between the independent variable (abdominal obesity) and outcomes (relative HGS), as well as to determine whether fasting glucose levels mediated the relationship between excess adiposity and relative HGS. A total of 1239 (78.8%) had abdominal obesity. Abdominal obesity had a negative effect on fasting glucose (β = 9.04, 95%CI = 5.87 to 12.21); while fasting glucose to relative HGS was inversely related (β = −0.003, 95%CI = −0.005 to −0.001), p < 0.001. The direct effect of abdominal obesity on relative HGS was statistically significant (β = −0.069, 95%CI = −0.082 to −0.057), p < 0.001. Lastly, fasting glucose levels mediates the detrimental effect of abdominal obesity on relative HGS (indirect effect β = −0.002, 95%CI = −0.004 to −0.001), p < 0.001. Our results suggest that the glucose level could worsen the association between abdominal obesity status and lower HGS. Thus, it is plausible to consider fasting glucose levels when assessing older adults with excess adiposity and/or suspected loss of muscle mass

Adherencia, satisfacción al tratamiento y calidad de vida de pacientes con cáncer de mama en el Hospital Universitario del Caribe.(Cartagena, Colombia)

Objetivos: Determinar la adherencia, satisfacción al tratamiento y calidad de vida de pacientes con cáncer de mama. Materiales y métodos: Estudio descriptivo, prospectivo, trasversal,  desarrollado en el Hospital Universitario del Caribe, entre agosto de 2014 y  abril de 2015. La muestra fueron 23 pacientes, diagnosticadas de cáncer de mama. La adherencia, satisfacción al tratamiento y calidad de vida se determinaron con los instrumentos siguientes: Cuestionario simplified medication adherence questionnaire (SMAQ), registro de dispensación del hospital (RD), test de satisfacción ESTAR del Estudio ARPAS adaptado y el cuestionario WHOQOL BREF respectivamente. El cuestionario ESTAR fue  validado por expertos y mediante alfa de Cronbach.   Resultados: El 54,78% de las pacientes (según SMAQ), fueron no  adherentes a quimioterápicos, la satisfacción fue de 3,94 (rango 0-6). La calidad de vida estuvo en un promedio de 3.2 (rango 1-5), con valores de 14,5% y 7,14% en el nivel 5 del rango. La mayoría de dimensiones del cuestionario de calidad de vida guardan una correlación directamente  proporcional con el nivel total de satisfacción al tratamiento; arrojando un dato negativo (-0,3207) únicamente en la dimensión de satisfacción con la eficacia al tratamiento   Conclusiones: La calidad de vida fue media y baja, la adherencia y  satisfacción al tratamiento fueron bajas y se presentó una correlación inversa entre calidad de vida y la satisfacción al tratamiento, probablemente a causa de reacciones adversas indeseables que se constituyen en disminución de la calidad de vida