[Review of] A. Roy Eckardt. Black, Woman, Jew: Three Wars for Human Liberation

In this book, A. Roy Eckardt uses his anger against oppression in its various forms and his extensive knowledge of the literatures in the field to craft a work of the first magnitude. He views oppression, as he explains, from the perspective of a white, male gentile ... a privileged minority: the nonoppressed of the world. Yet his honesty and compassion for the oppressed represented in this study take him into the center of the battle which he wages: the battle for human liberation. His new book is, he explains, a sequel to For Righteousness\u27 Sake: Contemporary Moral Philosophies, published in 1987

Critique [of What Shall I Give My Children? The role of the Mentor in Gloria Naylor\u27s The Women of Brewster Place and Paule Marshall\u27s Praisesong for the Widow by Linda Wells]

In her article \u27What Shall I Give My Children?\u27: The Role of the Mentor in Gloria Naylor\u27s The Women of Brewster Place and Paule Marshall\u27s Praisesong for the Widow, Wells focuses upon the woman\u27s role as mentor in various works of modem African American women writers. In using Gwendolyn Brooks\u27 poem as the cornerstone of her study, she establishes the sense of anguish and frustration faced by the mother who seeks to give to her children a sense of worth and self-esteem in a society which automatically disenfranchises them. She poses an important question -- one that goes beyond the role of mother: How does the power of mentoring and affiliation help women to overcome the institutional oppression leveled against them because of race, gender and class? The works of Naylor and Marshall offer their individual answers for triumph in the face of an autumn freezing everywhere

[Review of] William L. Andrews. To Tell a Free Story: The First Century of Afro-American Autobiography, 1760-1865

William L. Andrews\u27 To Tell a Free Story is a fine study of the history and development of the Afro-American narrative in its first century. Andrews presents the narrative in the hands of its creators as a dynamic form which, when studied for its process of telling, expresses the movement of its writers from an absence of self to a celebration of both self and community. It follows in the footsteps of Andrew\u27s\u27 other important contributions to the field of black studies, and promises to serve as a resource to which other studies of the genre can look

Por qué hablar sobre sexualidad en la escuela : un proyecto en marcha

Somos docentes de nivel medio de Argentina que, estimuladas por la necesidad de incluir la educación sexual en la escuela, pusimos en marcha hace algunos años un proyecto de cambio. Este promueve generar espacios que posibiliten la reflexión, estimulen el pensamiento crítico y aporten conocimientos científicos, para que los adolescentes puedan ampliar sus posibilidades de decisión y elección, en un marco de expresión, confianza y compromiso de búsqueda y construcción conjunta. Para ello partimos de un trabajo de indagación a través de encuestas que fue constituyendo la base de una investigación. A partir de los resultados de la investigación reformulamos la secuencia didáctica de Educación para la Salud. La última unidad "Reproducción" pasó a ser la primera "Sexualidad y Reproducción" convirtiéndose en disparadora y referente de los temas del año. Sobre la base de los resultados, vamos mejorando y ampliando el proyecto de modo tal de incluir instancias de talleres y espacios de discusión y reflexión extracurriculares para otros alumnos y docentes de la escuela y para padres

Por qué hablar sobre sexualidad en la escuela : un proyecto en marcha

Somos docentes de nivel medio de Argentina que, estimuladas por la necesidad de incluir la educación sexual en la escuela, pusimos en marcha hace algunos años un proyecto de cambio. Este promueve generar espacios que posibiliten la reflexión, estimulen el pensamiento crítico y aporten conocimientos científicos, para que los adolescentes puedan ampliar sus posibilidades de decisión y elección, en un marco de expresión, confianza y compromiso de búsqueda y construcción conjunta. Para ello partimos de un trabajo de indagación a través de encuestas que fue constituyendo la base de una investigación. A partir de los resultados de la investigación reformulamos la secuencia didáctica de Educación para la Salud. La última unidad “Reproducción” pasó a ser la primera “Sexualidad y Reproducción” convirtiéndose en disparadora y referente de los temas del año. Sobre la base de los resultados, vamos mejorando y ampliando el proyecto de modo tal de incluir instancias de talleres y espacios de discusión y reflexión extracurriculares para otros alumnos y docentes de la escuela y para padres

Optimizing direct laser-driven electron acceleration and energy gain at ELI-NP

We study and discuss electron acceleration in vacuum interacting with fundamental Gaussian pulses using specific parameters relevant for the multi-PW femtosecond lasers at ELI-NP. Taking into account the characteristic properties of both linearly and circularly polarized Gaussian beams near focus we have calculated the optimal values of beam waist leading to the most energetic electrons for given laser power. The optimal beam waist at full width at half maximum correspond to few tens of wavelengths, $\Delta w_0=\left\{13,23,41\right\}\lambda_0$, for increasing laser power $P_0 = \left\{0.1,1,10\right\}$ PW. Using these optimal values we found an average energy gain of a few MeV and highest-energy electrons of about $160$ MeV in full-pulse interactions and in the GeV range in case of half-pulse interaction.Comment: 12 pages, 10 figure

STUDIES ON THYMUS FUNCTION : II. COOPERATIVE EFFECT OF NEWBORN AND EMBRYONIC HEMOPOIETIC LIVER CELLS WITH THYMUS FUNCTION

Significant immunological restoration of 45-day old, neonatally thymectomized C3Hf mice was obtained by the cooperation of syngeneic newborn or embryonic hemopoietic liver cells with thymic function. Thymic function or cells alone are almost ineffective or restore approximately 10% of the animals. Newborn liver cells are effective in association with thymus grafts or humoral thymic function (thymoma grafts and thymus or thymomas in diffusion chambers). Embryonic liver cells are ineffective, even in large numbers, when associated with humoral thymic function. On the other hand, embryonic liver cells are effective in the cooperative effect only in association with viable thymus grafts, preferably syngeneic, whether the grafts were placed subcutaneously, intraperitoneally, or under the kidney capsule. Dispersed viable thymic cells are ineffective in association with embryonic liver cells. Cells capable of cooperating with humoral thymic function start to appear to embryonic liver by day 19–21 of gestation and are detectable until day 5–6 postbirth. Embryonic hemopoietic liver cells from 12 to 18 days of gestation contain cells capable of cooperation only with viable free thymus grafts and not with humoral thymic function. A prethymic cell population of partially differentiated cells of hemopoietic origin, insensitive to humoral activity of the thymus but requiring thymic stroma and traffic through the thymus is postulated to explain our results. This population of prethymic cells can become postthymic through this process and eventually develop into competent cells. Postthymic cells are characterized by their sensitivity to humoral activity of the thymus and by their wide distribution in the lymphohemopoietic tissues of newborn and young adult mice

MORPHOLOGICAL AND FUNCTIONAL STUDIES OF FETAL THYMUS TRANSPLANTS IN MICE

The fetal thymus at 13 days of gestation withstands transplantation and develops normally under the renal capsule of a syngenic host. Distinct differences were observed between the fetal thymus grafts and grafts from neonatal or adult thymus donors. The fetal thymus graft did not undergo the rapid and severe necrosis observed when adult thymus was grafted. Furthermore, when thymuses were transplanted into allogenic recipients, rejection was delayed. The fetal thymus was as effective as the adult thymus in restoring syngenic neonatally thymectomized mice and far superior to adult thymus when grafted into allogenic recipients. These observations seem relevant to clinical efforts to restore immunocompetence in patients with congenital absence of the thymus