112,599 research outputs found
Letter from H. B. Simons to Hubert Creekmore (14 October 1953)
No full textSimons writes from Palestine, Texas, to Creekmore, regarding The Chain in the Heart. He expresses his surprise at learning that Creekmore is not African American, and he praises Creekmore for understanding African Americans\u27 experiences in the South at the time.https://egrove.olemiss.edu/creekmore/1176/thumbnail.jp
Interpret in context: generalizing from the single case in evaluation
No full textThis article presents an argument for how to generalize from a single case study evaluation of a social programme or policy, focusing on two essential elements of case study – context and particularity. Taking an interpretivist perspective and drawing on artistic and humanistic ways of understanding, it examines both different ways of generalizing from the case that retain a connection with the context in which they first arose and how we generalize by direct encounter with the particular. This argument is not new. It has its origins in earlier centuries and, in contemporary evaluation, dating back to the 1970s. However, in a political climate that privileges evaluation approaches stemming from large sample studies and experimental designs, it seems timely to restate the value of generalizing from the single case. Grounded in the reality of programme experience and retaining that connection with context and particulars in the case facilitates the use of evaluation knowledge
Magnetoelectric boundary simulated by a Chern-Simons-like model
No full textIn this work we study some physical phenomena that emerge in the vicinity of a magnetoelectric boundary. For simplicity, we restrict to the case of a planar boundary described by a coupling between the gauge field with a planar external Chern-Simons-like potential. The results are obtained exactly. We compute the correction undergone by the photon propagator due to the presence of the Chern-Simons coupling and we investigate the interaction between a stationary point-like charge and the magnetoelectric boundary. In the limit of a perfect mirror, where the coupling constant between the field and the potential diverges, we recover the image method. For a non perfect mirror, we show that we have an attenuated image charge and, in addition, an image magnetic monopole whose field strength does not exhibit the presence of the undesirable and artificial divergences introduced by Dirac strings. We also study the interaction between the plate and a quantum particle with spin. In this case we have a kind of charge-magnetic dipole interaction due to the magnetoelectric properties of the plate
Analysis of watersheds and river systems: short course
No full textShort course: Analysis of Watersheds and River Systems, Session I and II, held on May 28-June 1, 1979 and June 4-June 8, 1979 at Colorado State University, Fort Collins, Colorado.Speakers: Dr. E. V. Richardson, Dr. David Duttweiller, Mr. Lee Mulkey, Dr. Stanley A. Schumm, Dr. Daryl B. Simons, Dr. Ross Carder.Includes bibliographical references.This short course is designed for individuals dealing with the analysis of watersheds and rivers. Practical applications concerning physical processes will be emphasized.Chapter 1. General introduction / Daryl B. Simons and Ruh-Ming Li -- Chapter 2. Introduction to watershed and river analysis / Daryl B. Simons and Ruh-Ming Li -- Chapter 3. Physical processes governing response of watersheds and rivers / Daryl B. Simons, Timothy J. Ward and Ruh-Ming Li -- Chapter 4. Sediment transport / H. W. Shen -- Chapter 5. Alluvial bed roughness / H. W. Shen -- Chapter 6. Overview of flood routing methods / Ruh-Ming Li and V. Miguel Ponce -- Chapter 7. Water routing and yield from watersheds, Part I and II / Ruh-Ming Li, Daryl B. Simons, and Kenneth G. Eggert -- Chapter 8. Water routing in rivers / Yung-Hai Chen -- Chapter 9. Stage discharge relations / Robert K. Simons, Ruh-Ming Li, and Daryl B. Simons -- Chapter 10. Watershed sediment yield / Ruh-Ming Li, Daryl B. Simons, and Timothy J. Ward -- Chapter 11. Unsteady sediment routing models in rivers / Yung-Hai Chen and Daryl B. Simons -- Chapter 12. Known discharge sediment routing / Glenn O. Brown and Ruh-Ming Li -- Chapter 13. Landslide potential delineation / Timothy J. Ward, Ruh-Ming Li, and Daryl B. Simons -- Chapter 14. Application of Kalman filtering in watershed and river analysis / Nguyen Duong -- Chapter 15. Handheld calculator programs for analysis / Kenneth G. Eggert, Ruh-Ming Li, and Daryl B. Simons -- Chapter 16. Overview of case studies and data management / Daryl B. Simons, Ruh-Ming Li, and Nguyen Duong -- Chapter 17. Canal and channel design and river response analysis / Daryl B. Simons, Ruh-Ming Li, and Yung-Hai Chen -- Chapter 18. Degradation and aggradation analysis / Ruh-Ming Li and Daryl B. Simons -- Chapter 19. Watershed best management analysis / Ruh-Ming Li, Timothy J. Ward, and Daryl B. Simons -- Chapter 20. Large river basin analysis: Yazoo River Sedimentation Study / Daryl B. Simons and Ruh-Ming Li
Scattering Amplitudes of Massive N=2 Gauge Theories in Three Dimensions
No full textWe study the scattering amplitudes of mass-deformed Chern-Simons theories and Yang-Mills-Chern-Simons theories with N=2 supersymmetry in three dimensions. In particular, we derive the on-shell supersymmetry algebras which underlie the scattering matrices of these theories. We then compute various 3 and 4-point on-shell tree-level amplitudes in these theories. For the mass-deformed Chern-Simons theory, odd-point amplitudes vanish and we find that all of the 4-point amplitudes can be encoded elegantly in superamplitudes. For the Yang-Mills-Chern-Simons theory, we obtain all of the 4-point tree-level amplitudes using a combination of perturbative techniques and algebraic constraints and we comment on difficulties related to computing amplitudes with external gauge fields using Feynman diagrams. Finally, we propose a BCFW recursion relation for mass-deformed theories in three dimensions and discuss the applicability of this proposal to mass-deformed N=2 theories
H. Taine: Sa vie et sa correspondance, Tome IV : 1876-1893
No full textSimons G. H. Taine: Sa vie et sa correspondance, Tome IV : 1876-1893. In: Revue néo-scolastique. 14ᵉ année, n°55, 1907. pp. 437-440
H. Taine. Sa vie et sa correspondance. Tome III, 1870-1875
No full textSimons G. H. Taine. Sa vie et sa correspondance. Tome III, 1870-1875. In: Revue néo-scolastique. 13ᵉ année, n°50, 1906. pp. 218-220
H. Taine: Sa vie et sa correspondance, Tome IV : 1876-1893
No full textSimons G. H. Taine: Sa vie et sa correspondance, Tome IV : 1876-1893. In: Revue néo-scolastique. 14ᵉ année, n°55, 1907. pp. 437-440
Cultural codes - who holds the key?: The concept and conduct of evaluation in Central and Eastern Europe
No full textThis article examines the impact of cultural codes on the conduct and outcomes of evaluation. Cultural codes are defined as symbols and systems of meaning that are relevant to members of a particular culture (or subculture). These codes can be utilized to facilitate communication within the ‘inside group’ and also to obscure the meaning to ‘outside groups’. Drawing on the authors' combined experiences in Central and Eastern Europe, the article explores how cultural codes emerged in these contexts and the challenges they presented to the conduct and utilization of evaluation and to the evaluators themselves. Evaluators must be prepared, it is suggested, to unlock their own internal codes in relation to those of other cultures in order to create the appropriate socio-political relationships that are a prerequisite for learning and change. The article concludes with a discussion of the kind of partnerships and trust it is necessary to establish to underpin a mutual unlocking of codes
- …
