Feasibility report of conservative surgery, perioperative high-dose-rate brachytherapy (PHDRB), and low-to-moderate dose external beam radiation therapy (EBRT) in pediatric sarcomas

This study was undertaken to determine the feasibility of perioperative high-dose-rate brachytherapy (PHDRB) as an accelerated boost in patients with pediatric sarcomas. METHODS AND MATERIALS: Five pediatric patients (ages 7-16) with soft tissue sarcomas (STS) or soft tissue recurrences of previously treated osteosarcomas were treated with surgical resection and PHDRB (16-24 Gy) for R0-R1 resections. Patients with STS and osteosarcomas received 27 Gy and 45 Gy of EBRT postoperatively. RESULTS: After a median follow-up of 27 months (range, 12-50) all the patients remain locally controlled. Only 1 patient developed regrowth of pulmonary metastases and died of distant disease at 16 months. CONCLUSIONS: The use of PHDRB is safe in the short-term in this pediatric population. Only 1 patient suffered a partial wound dehiscence that may not be entirely related to PHDRB. Patients with recurrent osteosarcomas can be treated in a fashion similar to their adult soft tissue counterparts and avoid limb amputation. Younger patients with STS may achieve local control and prevent growth retardation with a combination of PHDRB and moderate doses of EBR

Seguimiento del nivel de líquido de un sistema de tanques acoplado empleando control cuasi-lpv

This article proposes a gain-scheduling procedure based on quasi-LPV modeling for a nonlinear coupled tank system to track the liquid level with zero steady-state error. The nonlinearities are directly represented by a parameter vector that varies within a bounded set constrained by the physical limits of the tank system levels. This approach enables accurate nonlinear system modeling using a linear parameter-varying model. State-feedback linear controllers are designed at the extreme vertices of the bounded set. The global controller is derived as the weighted average of local controller contributions, with the weighting determined by the instantaneous values of the parameter vector. Two interpolation mechanisms are proposed to implement this weighted averaging of the linear controllers. The results confirm the effectiveness of the proposed method in achieving accurate liquid level tracking.En este artículo se propone un procedimiento de programación de ganancias basado en un modelado cuasi-LPV de un sistema no lineal de tanques acoplados para seguir el nivel de líquido con error en estado estacionario nulo. Las no linealidades están representadas directamente por un vector de parámetros que varía dentro de un conjunto acotado por los límites físicos del nivel del sistema de tanques. Esto permite un modelado exacto del sistema no lineal utilizando un modelo lineal de parámetros variantes. Luego, se diseñan controladores lineales de realimentación de estado en los vértices extremos del conjunto acotado. El controlador global corresponde a un promedio ponderado de las contribuciones locales. Esta ponderación depende de los valores instantáneos del vector de parámetros. Para implementar el promedio ponderado de los controladores lineales, se proponen dos mecanismos de interpolación. Los resultados obtenidos muestran la efectividad del método

Comentarios al pliego de condiciones generales aprobado por el Real Decreto de 10 de julio de 1861

Copia digital. España : Ministerio de Cultura. Subdirección General de Coordinación Bibliotecaria, d2024Rústica.Registro de la Propiedad Intelectual: Ley de 1847; n. de solicitud de ingreso: "4886"; fecha y datos de ingreso: "22 Marzo 67

Encountering Faces Of The Other: A Phenomenological Study Of American High School Students Journeying Through South Africa

ABSTRACT TITLE OF DISSERTATION: ENCOUNTERING FACES OF THE OTHER: A PHENOMENOLOGICAL STUDY OF AMERICAN HIGH SCHOOL STUDENTS JOURNEYING THROUGH SOUTH AFRICA Christopher Scott Garran, Doctor of Philosophy, 2004 Dissertation directed by: Professor Francine Hultgren Department of Education Policy & Leadership In this phenomenological study, I explore the lived experience of American high school students encountering the Other within South Africa. My research question wonders, "While dwelling with one-an-Other, what is the experience like for my students to journey to the place of South Africa and to encounter the primary Other of the people, the Other of nature and the Other of social justice?" My exploration relies heavily upon the works of Levinas, Heidegger and Freire. As a research guide, van Manen keeps me attuned pedagogically. Through the de-tour and the tension of the encounter experience, I follow my students' voices. As I dig deep into their lived experience of encountering the face of the South African Other, I unearth the phenomenon's essential structures. A preliminary study with two students reveals in the initial encounter a "starting from oneself" where they feel a captured, advertised and alienated presence. In going face-to-face and in unpacking their prejudices, they place the Other behind an exotic mask. Considering the lived place of South Africa, these two students speak to a dwelling together and a wandering-out. As I dig deeper, the eight students of my study lead me toward the tensions within South Africa's beautiful, poor places. In these lived places, the Other's face summons my students and guilt spreads across their being. In seeing the Other, my students begin to realize that they, too, are watched. They begin to recognize the Other in the self and the self in the Other. Fractured by their encounter, my students step away from the ego-self. They begin to homestead and to construct an-Other-self. Standing on the frontier of transformation, my students begin to cultivate a self that crosses borders, holds an awareness of its attachment to the world and feels its unfinishedness. Finally, I suggest that teachers and students must lend their presence to one-an-Other while re-implacing themselves out in the world of lived experience. Intervening in the world, together as teacher and students, we cultivate the pedagogical conditions for transformative, social justice education

Foreign policy and political possibility

This article explores the relationship between foreign policy and political possibility in two parts. First, the relationship between foreign policy and political possibility is theorized around three analytical moments: political possibility is linked to the framing of conceivable, communicable and coercive foreign policy. Second, this framework is developed and demonstrated through a brief analysis of Coalition foreign policy in the War on Terror, considering American, British and Australian foreign policy between 2001 and 2003. This analysis dissects distinct and divergent Coalition foreign policies through a linked three-part conceptualization of political possibility. It enables an understanding of how the War on Terror was rendered possible through the construction of foreign policy in thinkable, resonant and ultimately dominant terms. The article concludes by looking to the wider analytical applicability of this particular theorization of the relationship between foreign policy and political possibility