201 research outputs found
Scaling symmetries, contact reduction and Poincaré’s dream
No full textWe state conditions under which a symplectic Hamiltonian system admitting a certain type of symmetry (a scaling symmetry) may be reduced to a type of contact Hamiltonian system, on a space of one less dimension. We observe that such contact reductions underly the well-known McGehee blow-up process from classical mechanics. As a consequence of this broader perspective, we associate a type of variational Herglotz principle associated to these classical blow-ups. Moreover, we consider some more flexible situations for certain Hamiltonian systems depending on parameters, to which the contact reduction may be applied to yield contact Hamiltonian systems along with their Herglotz variational counterparts as the underlying systems of the associated scale-invariant dynamics. From a philosophical perspective, one obtains an equivalent description for the same physical phenomenon, but with fewer inputs needed, thus realizing Poincare's dream of a scale-invariant description of the Universe
Countee Cullen-Harold Jackman Memorial Collection
No full textThe Cullen Jackman Memorial Collection (1881-1995) documents the artistic and creative nature of those of African descent. A series of note within this collection are the photographs by Carl Van Vechten, an American writer, artistic photographer, and patron of the Harlem Renaissance. An appreciator of the arts, Van Vechten promoted many of the major figures of the Renaissance through his photography, including Langston Hughes, Paul Robeson, Rose McClendon, and Ethel Waters.
At the AUC Robert W. Woodruff Library we are always striving to improve our digital collections. We welcome additional information about people, places, or events depicted in any of the works in this collection. To submit information, please contact us at [email protected]
The Implications of a National Popular Vote for President
No full textDefenders of the winner-take-all method of the Electoral College predict that implementing a national popular vote would cause less-densely populated cities and states to be forgotten in presidential elections. This paper takes a quantitative approach to evaluate that claim.
Author information: Julia Jackman is a senior at Barrett, the Honors College, at Arizona State University. She is majoring in Biochemistry and Global Health and minoring in Civic and Economic Thought and Leadership. Julia plans to pursue graduate studies in refugee studies and global health before applying for medical school
In Memory of an Emily
No full textabstract: In Memory of an Emily is a piece of creative nonfiction and a short film that together detail the author’s experience with mental illness in the collegiate environment. In its 45 pages, Jackman begins to detail the realities of living with depression, anxiety, and anorexia nervosa. The piece includes five sections of writing, including a preface and four portions describing freshman to senior year. Each section endeavors to explore simplistic and purposefully cliché events common in young adult/collegiate life and juxtapose the banal nature of these events with the experience of the mentally ill. Her story endeavors to explore the emotional truths of pain and suffering, revealing that beneath her tender façade lies a very different existence, one tangled in eating disorders, panic attacks, and overwhelming sadness. While maintaining a story-like quality traditional to creative non-fiction, Jackman ventures to warn with a cautionary tale of pathologizing abnormality and exploring the long lasting effects of childhood trauma. Weaving careful storytelling into an exploration of the mentally ill mind, Jackman keeps the reader both terrifyingly close and far away, whispering painful secrets and then desperately running away with the truth. She speaks frankly of all aspects of life, ranging from far more mundane events, such as break ups and college rejection letters, to complicated issues, such as the suicide of her grandfather and her admission into an eating disorder facility. The author attempts to establish a balanced rapport with the reader, recognizing the need to maintain distance and elicit emotion simultaneously. Jackman writes In Memory of an Emily as a heartbreaking but authentic tale, playing with stream of consciousness and paralyzing emotional description. She opens the door and invites the reader into her mind so as to share in the physical and emotional discomfort of the storyteller, but then promptly slams the door once inside
Cedric Dover, April 15, 1948
No full textPortrait of Cedric Dover. Written on recto: For Harold with every good wish, Cedric. Written on verso: The late Cedric Dover, Eurasian at one time on the faculty at Fisk University, and author of the famous book on Negro art, for which Harold Jackman furnished much of the material; Photograph by Carl Van Vechten; 101 Central Park West; Cannot be reproduced without permission; April 15, 1948
Claude McKay, circa 1933
No full textA portrait of Claude McKay. Written on recto: Claude McKay, author of "Banjo" and "Home to Harlem," whose new novel, "Banana Bottom," will be published by Harper & Brothers on March 29th, has been living in Spain and Morocco for the last three years. The background of his novel is the island of Jamaica, British West Indies, where Mr. McKay was born. Written on verso: For Harold Jackman After a five year interval wit[?] the same sentiment. Claude McKa
Details on the author\u27s airplane ride over the northern forests with representat
No full textDetails on the author\u27s airplane ride over the northern forests with representatives of Ban clear-cutting, the group sponsoring the November 5 referendum on clear-cutting and forest practices. The author writes that the buffer zones left around clearcuts resemble suburban lawns, manufactured as gestures of compliance. A dozen clearcuts south of Jackman leave the area unsuitable for harvesting again until 2010
A review of CJD research regarding molecular function and genetic predispositions
No full textCreutzfeldt-Jakob disease (CJD) is the most common form of human transmissible spongiform encephalopathy, occurring at a rate of 1-2 per million. This disease is caused by the misfolding of a prion protein from its natural state (PrPᶜ) into a pathogenic state of the protein (PrPˢᶜ). The disease causes aggregation of amyloids in the brain that lead to symptoms akin to that of Alzheimer's disease and, in all cases, death. It has been found that the occurrence of this disease is associated with mutations in regions of PRNP gene that codes the prion protein, as well as changes in the genetic expression of many other genes. This state-of-the-art review compiles and analyzes the most recent research focusing on genetic predispositions related to CJD and how the effects of CJD on the body can be studied to find new diagnostic techniques. Also, it explores a recent case of interaction between CJD and COVID-19
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