The Snail Darter, The Tellico Dam, and Sustainable Democracy — Lessons for the Next President From a Classic Environmental Law Controversy.

This presentation was the product of an invitation to speak at a symposium for students and faculty from a variety of different non-law departments at the University of Tennessee, where in 1973 I had started what became a six-year legal campaign to divert the Tennessee Valley Authority from impounding the last flowing 33 miles of the Little Tennessee River behind TVA’s Tellico Dam.

Laser Safety in higher education - Classic video!

Vintage video (1986) on laser safety, presented by Dr. Gillian Rice. This is a 37 minute video, explaining the hazards which are likely to be encountered and ways to reduce those hazards in teaching and research laboratories in higher education. Presented in 5 parts: Part 1 (1:49) Laser radiation and the body Part 2 (8:49) Classes of laser Part 3 (13:32) Safety measures Part 4 (21:32) Other risks: precautions Part 5 (31:49) Summary

Representaciones sociales hegemónicas y polémicas en el contexto de identidad rural [TC]

El objetivo de este estudio es conocer las representaciones de lo rural y lo urbano con el intento de comprender cómo miembros de una comunidad rural se posicionan frente a la estructura social y simbólica hegemónicamente urbana. Se obtuvo el conjunto de datos a través de entrevistas a 200 integrantes de una comunidad rural, contemplando los siguientes núcleos de información: motivaciones para éxodo/permanencia en el territorio, experiencia de prejuicios, estereotipos atribuidos al grupo rural, y valores endo/exo-grupales. Los resultados referentes a las motivaciones para el éxodo o permanencia en el campo revelaron el predominio del proyecto de vida vinculado a lo rural. Los clásicos estereotipos de roceiros, bobos y caipiras fueran identificados como la imagen social del hombre del campo, elementos que producen el escenario conflictivo estratégico a la elaboración de representaciones defensivas, siendo el endogrupo rural asociado a valores positivos, y la ciudad, a significados negativamente valorizados. Se discute el imaginario grupal como campo de fuerzas en el que se elaboran representaciones polémicas en respuesta a la hegemonía urbana.

Beginning to read : the new phonics in context : a precis of the classic text.

Trata de conciliar el debate que ha dividido durante décadas a los teóricos sobre el 'correcto' modo de ayudar a los niños a aprender a leer, y pone de manifiesto que los educadores no deben verse atrapados en el dilema de fonética versus lectura con significado. Se propone un tratamiento integral, incluida la fonética, de los conocimientos y los procesos involucrados en el desarrollo de la habilidad para la lectura.

The adult learner : the definitive classic in adult education and human resource development.

Es una lectura esencial para los profesionales del aprendizaje de adultos, estudiantes y profesionales de los recursos humanos, pues proporciona un marco teórico para la comprensión de los problemas del aprendizaje de adultos, tanto en los entornos docentes como en los lugares de trabajo. Se divide en tres partes: la primera parte estudia 'Las raíces de la andragogía', se traza el desarrollo de esta teoría y las características de los estudiantes adultos; en la segunda parte 'Los avances en el aprendizaje de adultos', se explican sus perspectivas de futuro en la investigación y la práctica y, en la última parte, 'Practica en el aprendizaje de adultos', se presentan lecturas seleccionadas que desarrollan los aspectos específicos de la andragogía en la práctica y que incluye estrategias para implementar los supuestos básicos, para adaptar el aprendizaje a las diferencias individuales, y para implementar la educación de adultos en las organizaciones. De especial interés son dos instrumentos de autoevaluación, 'the Core Competency Diagnostic and Planning Guide' y 'the Personal Adult Learning Style Inventory' que permiten al lector ponerse en camino del desarrollo personal en el aprendizaje de adultos.

Originals : classic and modern fiction and non-fiction in English with key.

Libro para estudiantes de inglés como lengua extranjera de nivel intermedio que quieran mejorar mediante la lectura, y para la preparación del examen Cambridge Preliminary English Test (PET). Contiene 28 fragmentos de obras clásicas y modernas de ficción o basadas en hechos reales, escritas en inglés por autores de distintos países, en orden ascendente de dificultad. Incluye una breve biografía de cada autor, preguntas previas a la lectura para estimular el interés, ejercicios de compresión y debate para trabajar con el texto, y ejercicios de vocabulario y gramática. Hay una sección con todas las soluciones al final del libro.

The classic stories

Se describe una experiencia llevada a cabo en la CEPA de Miajadas (C??ceres), que consisti?? en dramatizar algunos cuentos cl??sicos en ingl??s en centros educativos de la zona. La actividad conllev?? la lectura de los textos, su memorizaci??n, la adaptaci??n del vocabulario al p??blico y por ??ltimo, la dramatizaci??n

Pour une formation muséologique contextualisée à réinventer en permanence

N’ayant pas tout à fait saisi la portée et le sens du thème proposé pour la conférence “Une formation pour un musée universel”, dois-je comprendre qu’il devrait y avoir un seul modèle de formation pour l’ensemble des musées dans le monde ou bien que ceux-ci devraient refléter en premier lieu des préoccupations dites universelles? Partisan initiateur, militant et formateur de la nouvelle muséologie dans ses composantes sociales et de développement régional, s’appuyant sur les pratiques les plus évoluées de l’écomuséologie et de la démocratie culturelle, héritières de décennies d’action-recherche populaire autonome dans plusieurs régions du monde, je ne crois pas, si telle était la proposition, qu’il puisse y avoir un modèle universel de musée, ni une formation universelle desservant celui-ci.

Rapid radiation in spiny lobsters (Palinurus spp) as revealed by classic and ABC methods using mtDNA and microsatellite data

Background: Molecular tools may help to uncover closely related and still diverging species from a wide variety of taxa and provide insight into the mechanisms, pace and geography of marine speciation. There is a certain controversy on the phylogeography and speciation modes of species-groups with an Eastern Atlantic-Western Indian Ocean distribution, with previous studies suggesting that older events (Miocene) and/or more recent (Pleistocene) oceanographic processes could have influenced the phylogeny of marine taxa. The spiny lobster genus Palinurus allows for testing among speciation hypotheses, since it has a particular distribution with two groups of three species each in the Northeastern Atlantic (P. elephas, P. mauritanicus and P. charlestoni) and Southeastern Atlantic and Southwestern Indian Oceans (P. gilchristi, P. delagoae and P. barbarae). In the present study, we obtain a more complete understanding of the phylogenetic relationships among these species through a combined dataset with both nuclear and mitochondrial markers, by testing alternative hypotheses on both the mutation rate and tree topology under the recently developed approximate Bayesian computation (ABC) methods. Results: Our analyses support a North-to-South speciation pattern in Palinurus with all the South-African species forming a monophyletic clade nested within the Northern Hemisphere species. Coalescent-based ABC methods allowed us to reject the previously proposed hypothesis of a Middle Miocene speciation event related with the closure of the Tethyan Seaway. Instead, divergence times obtained for Palinurus species using the combined mtDNA-microsatellite dataset and standard mutation rates for mtDNA agree with known glaciation-related processes occurring during the last 2 my. Conclusion: The Palinurus speciation pattern is a typical example of a series of rapid speciation events occurring within a group, with very short branches separating different species. Our results support the hypothesis that recent climate change-related oceanographic processes have influenced the phylogeny of marine taxa, with most Palinurus species originating during the last two million years. The present study highlights the value of new coalescent-based statistical methods such as ABC for testing different speciation hypotheses using molecular data.

Selective biodegradation of keratin matrix in feather rachis reveals classic bioengineering

Flight necessitates that the feather rachis is extremely tough and light. Yet, the crucial filamentous hierarchy of the rachis is unknown—study hindered by the tight chemical bonding between the filaments and matrix. We used novel microbial biodegradation to delineate the fibres of the rachidial cortex in situ. It revealed the thickest keratin filaments known to date (factor >10), approximately 6 µm thick, extending predominantly axially but with a small outer circumferential component. Near-periodic thickened nodes of the fibres are staggered with those in adjacent fibres in two- and three-dimensional planes, creating a fibre–matrix texture with high attributes for crack stopping and resistance to transverse cutting. Close association of the fibre layer with the underlying ‘spongy’ medulloid pith indicates the potential for higher buckling loads and greater elastic recoil. Strikingly, the fibres are similar in dimensions and form to the free filaments of the feather vane and plumulaceous and embryonic down, the syncitial barbules, but, identified for the first time in 140+ years of study in a new location—as a major structural component of the rachis. Early in feather evolution, syncitial barbules were consolidated in a robust central rachis, definitively characterizing the avian lineage of keratin.

Permanence of stability for a class of system of differential equations with two delays

The paper studies a class of a system of linear retarded differential difference equations with several parameters. It presents some sufficient conditions under which no stability changes for an equilibrium point occurs. Application of these results is given. (c) 2007 Elsevier Ltd. All rights reserved.

Effects of Different Periods of Clomazone plus Hexazinona Permanence in Soil and Sugarcane Mulch before the Occurrence of Rain on Weed Control Efficacy

The objective of this work was to evaluate the efficacy of the formulated mixture clomazone and hexazinone applied in soil or combined with sugarcane mulch, after different periods of permanence without the occurrence of rain. The experiment was carried out in vases under greenhouse conditions in Botucatu, São Paulo, Brazil. The weeds Brachiaria decumbens, Ipomoea grandifolia, Ipomoea hederifolia and Euphorbia heterophylla were sown and covered or not with sugarcane mulch. The experiment was arranged in a complete randomized design with four repetitions. The treatments were displaced in a 3x6 factorial scheme, with the factors being six periods without rain (0, 3, 7, 15, 30, and 60 days) and three modes of herbicide application(on the soil without sugarcane mulch, on and under sugarcane mulch). Control evaluations were carried out at 10, 21, 35 and 42 days after the occurrence of rain. The clomazone + hexazinone mixture promoted an excellent weed control for all the species studied when applied on, under, or without sugarcane mulch. However, the control levels tended to reduce for periods over 60 days without rain.