Reconstruction of practices and identities in a context of intercultural mathematics education and social justice

En esta comunicación describimos la reconstrucción de prácticas e identidades culturales en un contexto de la educación matemática intercultural y de justicia social, que forma parte de una investigación en colaboración con un grupo de docentes de educación primaria en las comunidades de la provincia de Canas de Perú. En este estudio se pretende enlazar las concepciones, procesos y valores practicados en las comunidades andinas con las actividades escolares de matemáticas. Este proceso de reconstrucción tiene como finalidad promover el respeto, la identidad y la participación. Hemos identificado como eje trascendental para la organización de las actividades escolares el calendario comunal, que es la secuencia de actividades anual que la comunidad ha establecido histórica y culturalmente. A partir de esta organización se propone la construcción de prácticas e identidades de actividades culturales de la comunidad local que conecta con los contenidos escolares. La metodología empleada en este estudio es el estudio de casos. La recolección de datos consistió en entrevistas y observaciones de actividades en aulaIn this paper we describe the reconstruction of cultural practices and identities in a context of intercultural mathematics and social justice education, which is part of a collaborative research with a group of elementary education teachers in the communities of the province of Canas in Peru. This study aims to link the conceptions, processes and values practiced in the Andean communities with the school activities in mathematics. This reconstruction process aims to promote respect, identity and participation. We have identified as a transcendental axis for the organization of school activities the communal calendar, which is the annual sequence of activities that the community has historically and culturally established. From this organization it is proposed the construction of practices and identities of cultural activities of the local community that connects with the school contents. The methodology used in this study is the case study. Data collection consisted of interviews and observations of classroom activitie

Resultados de la Colocación de Clavo Endomedular en Fracturas Diafisiarias de Tibia en el Hospital Regional de Andahuaylas, Entre los Años 2016 Y 2017

El presente trabajo pretende identificar los resultados de la colocación de clavo endomedular en fracturas diafisiarias de tibia del Hospital de Andahuaylas, Perú. En la literatura internacional se describe el enclavijado intramedular como el estándar de oro para su tratamiento y las últimas investigaciones enfatizan la mínima exposición. La población estuvo compuesta de 49 pacientes con el diagnóstico de fractura diafisiaria de tibia en el Hospital Regional de la ciudad de Andahuaylas entre el 1ro de enero del 2016 al 31 de diciembre del 2017. La técnica utilizada fue el método de revisión documentaria, y el instrumento una ficha de recolección de datos, en los pacientes que cumplían los criterios de inclusión y exclusión. En un total de 49 pacientes el grupo de edad más afectado fue el de 20 a 30 años. El sexo masculino predominó. La causa que con mayor frecuencia se observó fueron los accidentes de tránsito. En cuanto al tipo de exposición de la fractura predominó la abierta (73%); un 27% GUSTILO I con 13 pacientes, 24 % GUSTILO II con 12 pacientes, 22%; GUSTILO III A con 11 pacientes, 14 % GUSTILO III B con 7 pacientes. Las fracturas cerradas fueron no más de la quinta parte según este tipo de clasificación (TSCHERNE ) y correspondieron a un 15 % con 4 pacientes. En la clasificación AO de los tipos: 42-A1, 42-A2 y 42-A3 distribuidas en nueve subtipos correspondió al 67% (41 pacientes). En todos los pacientes se usó clavo endomedular que fue insertado a través del tendón rotuliano, a foco cerrado en el mas del 90% de los pacientes; y con fresado (rimado) del canal medular en todos los casos. No se usó radiología dentro de sala de operaciones en la gran mayoría de los pacientes. El tiempo promedio de consolidación radiológica grado III –IV fue de cuatro a cinco meses y además el tiempo para la carga total sin muletas fue igual. Conclusión : El uso del clavo intramedular en el tratamiento de las fracturas diafisiarias de tibia a foco cerrado proporciona una estabilidad inmediata debido al bloqueo proximal y distal, reducción cerrada e irrigación sanguínea del periostio, posibilidad de la movilización temprana de las articulaciones de la rodilla y el tobillo, facilidad con la que la extremidad pueda ser observada post quirúrgicamente, baja prevalencia de infecciones de la herida, adecuada estabilidad biomecánica de la corteza ósea y buena posibilidad de unión ósea; proporcionando estimulación temprana para la formación de callo óseo y una más rápida recuperación y retorno al trabajo. PALABRAS CLAVE Fractura diafisiaria de tibia, fractura diafisiaria abierta, accidentes de tráfico en Perú, enclavado endomedular, enclavado sin intensificador de imagen, accidente deportivo , fresado, clasificación de la Asociación de Osteosíntesis.Trabajo académic

Entanglement properties of quantum polaritons

ABSTRACT: Exciton polaritons are coupled states of matter and light, originated by the strong interaction between an optical mode and semiconductor excitons. This interaction can be obtained also at a single-particle level, in which case it has been shown that a quantum treatment is mandatory. In this work we study the light-matter entanglement of polaritons from a fully quantum formalism including pumping and dissipation. We find that the entanglement is completely destroyed if the exciton and photon are tuned at the resonance condition, even under very low pumping rates. Instead, the best condition for maximizing entanglement and purity of the steady state is when the exciton and photon are out of resonance and when incoherent pumping exactly compensates the dissipation rate. In the presence of multiple quantum dots coupled to the light mode, matter-light entanglement survives only at larger detuning for a higher number of quantum dots considered

ANALYSIS OF THE SETTING AND PREDICTIVE FACTORS OF THE EFFECT OF ATTACK ACCORDING TO GAME ECOLOGY: THE CASE OF FEMALE VOLLEYBALL

The objective of this study was to identify how the ecological variables influence the setter during the setting and what were the predictive factors of the attack effect among Brazilian teams ranked from the 1st to 4th place in the volleyball Women’s Super-League in 2016-2017. We analyzed 768 attacks from 10 matches played among the teams. A descriptive analysis was performed and, to identify how the setting location differed in relation to the ecological variables, the One-Way ANOVA (factor 1 = setting location) was used. In addition, multinomial logistic regression was performed to understand the predictive factors of the effect of the attack. The significance level was set at 5% (p≤.05) and the SPSS software version 20.0 was used. The results showed the setting location differed according to the distance between the setter and the central attacker, the distance between the setter and the central blocker, and the distance between the setter and the blocker of position 4. Besides, it was observed that the powerful attack and the blocking touch were predictive factors of the effect of the attack. Thus, it is concluded that the decision-making for the action of the setting is based on the availability of the central attacker and the configuration of the blockers, the powerful attack reduces the chances of defense and the blocking touch reduces the chances of scoring by attacking.Key words: volleyball, game analysis, game ecology</p

Aerobic Fitness Evaluation during Walking Tests Identifies the Maximal Lactate Steady State

Objective. The aim of this study was to verify the possibility of lactate minimum (LM) determination during a walking test and the validity of such LM protocol on predicting the maximal lactate steady-state (MLSS) intensity. Design. Eleven healthy subjects (24.2 ± 4.5 yr; 74.3 ± 7.7 kg; 176.9 ± 4.1 cm) performed LM tests on a treadmill, consisting of walking at 5.5 km · h−1 and with 20–22% of inclination until voluntary exhaustion to induce metabolic acidosis. After 7 minutes of recovery the participants performed an incremental test starting at 7% incline with increments of 2% at each 3 minutes until exhaustion. A polynomial modeling approach (LMp) and a visual inspection (LMv) were used to identify the LM as the exercise intensity associated to the lowest [bLac] during the test. Participants also underwent to 2–4 constant intensity tests of 30 minutes to determine the MLSS intensity. Results. There were no differences among LMv (12.6 ± 1.7%), LMp (13.1 ± 1.5%), and MLSS (13.6 ± 2.1%) and the Bland and Altman plots evidenced acceptable agreement between them. Conclusion. It was possible to identify the LM during walking tests with intensity imposed by treadmill inclination, and it seemed to be valid on identifying the exercise intensity associated to the MLSS

Acute exercise performed close to the anaerobic threshold improves cognitive performance in elderly females

The objective of the present study was to compare the effect of acute exercise performed at different intensities in relation to the anaerobic threshold (AT) on abilities requiring control of executive functions or alertness in physically active elderly females. Forty-eight physically active elderly females (63.8 ± 4.6 years old) were assigned to one of four groups by drawing lots: control group without exercise or trial groups with exercise performed at 60, 90, or 110% of AT (watts) and submitted to 5 cognitive tests before and after exercise. Following cognitive pretesting, an incremental cycle ergometer test was conducted to determine AT using a fixed blood lactate concentration of 3.5 mmol/L as cutoff. Acute exercise executed at 90% of AT resulted in significant (P < 0.05, ANOVA) improvement in the performance of executive functions when compared to control in 3 of 5 tests (verbal fluency, Tower of Hanoi test (number of movements), and Trail Making test B). Exercising at 60% of AT did not improve results of any tests for executive functions, whereas exercise executed at 110% of AT only improved the performance in one of these tests (verbal fluency) compared to control. Women from all trial groups exhibited a remarkable reduction in the Simple Response Time (alertness) test (P = 0.001). Thus, physical exercise performed close to AT is more effective to improve cognitive processing of older women even if conducted acutely, and using a customized exercise prescription based on the anaerobic threshold should optimize the beneficial effects

Las cantidades en la Yupana en un contexto de educación matemática intercultural y justicia social

En esta comunicación presentamos un análisis del proceso de construcción de prácticas e identidades relacionadas al concepto de cantidad, histórica y culturalmente presentes en las actividades de las comunidades andinas. Perseguimos dos propósitos: en primer lugar, un proceso de reconstrucción de prácticas culturales que enfatice el respeto, la identidad y la participación en un contexto de educación matemática intercultural y justicia social; en segundo lugar, que esta construcción de prácticas posibilite una adaptación pedagógica apropiada a través de un recurso también culturalmente relevante como es la Yupana. En este sentido, enlazamos las prácticas e identidades realizadas por las personas en un contexto cultural andino con las actividades escolares. Específicamente, analizamos la construcción de conceptos, procesos y valores relacionados a la cantidad y a las operaciones básicas, llevado a cabo con estudiantes del tercer y cuarto grado de educación primaria. La metodología empleada es el estudio de casos. La recolección de datos consistió en entrevistas y observaciones de actividades en aula

Brazilian high-level men’s volleyball: characterization of the attack performed by the opposite player

The present study aimed to characterize and differentiate between the predictive factors of the attacks performed by the opposite player from positions 1 and 2. The sample consisted of the observation records of 142 volleyball games of the Brazilian Men’s Super-League season 2014/2015, totaling 8,010 actions of reception, setting and attack, with 5,965 actions from position 2 and 2,045 from position 1. The analysis of the predictive factors of the opposite player’s attack, according to the position of the attack, showed that the attacks from position 2 are more likely to occur after reception B (OR:1.317), in either diagonal (OR:1.302) or parallel (OR: 1.548), and to result in blocking of the attack (OR:1.496). On the other hand, attacks performed from position 1 are more likely to occur after receiving A (OR:0.458) resulting in a point (OR:0.709). Thus, situational constraints influenced the predictive factors of the opposite player’s attack, according to the attacking position