Sample records for american history cluster

  1. Writing American Indian History (United States)

    Noley, Grayson B.


    The purpose of this paper is to critique the manner in which history about American Indians has been written and propose a rationale for the rethinking of what we know about this subject. In particular, histories of education as regards the participation of American Indians is a subject that has been given scant attention over the years and when…

  2. History of American Higher Education (United States)

    McCarthy, Margaret Cain


    "History of American Higher Education" documents the fascinating evolution of American colleges and universities, touching on the historical events that shaped them, from the colonial era through the early twenty-first century. Throughout history, higher education has played an important role in the transmission of cultural identity from…

  3. History of American Higher Education (United States)

    McCarthy, Margaret Cain


    "History of American Higher Education" documents the fascinating evolution of American colleges and universities, touching on the historical events that shaped them, from the colonial era through the early twenty-first century. Throughout history, higher education has played an important role in the transmission of cultural identity from one…

  4. History of Asian American psychology. (United States)

    Leong, Frederick T L; Okazaki, Sumie


    An overview of the history of Asian American psychology is provided by reviewing the context for the development of the field as well as the early founding of the Asian American Psychological Association (AAPA). The presidents of AAPA as well as key events and conferences are noted. The involvement of AAPA leaders in national mental health policies and activities are reviewed. The substantive areas of Asian American psychology and the education and training of Asian American psychologists are also discussed. The article ends with some comments about the future of Asian American psychology.

  5. Teaching American Environmental History. (United States)

    Strong, Douglas H.


    Themes, issues, teaching approaches, and bibliographic references to sources for a course in environmental history, offered with the hope of preparing students to formulate principles to guide our further conduct toward the environment, are described. (JH)

  6. American History (an introduction)

    DEFF Research Database (Denmark)

    Nye, David Edwin

    I et letforståeligt engelsk giver professor David Nye en fængende præsentation af amerikansk historie fra den tidlige kolonisationsperiode til præsident Obama. Bogen giver et helhedsportræt af perioderne og inkluderer til hver periode en kortfattet præsentation af kultur- og litteraturhistorien....

  7. Guide to Sources: American History. (United States)

    Patterson, Thomas H., Comp.

    Designed to introduce students to some of the basic bibliographic tools in American history available in the Fogler Library at the University of Maine, this guide begins by listing examples of relevant Library of Congress Subject Headings and providing brief explanations of the call numbers and classification systems (Library of Congress and Dewey…

  8. Women in Latin American History. (United States)

    Lavrin, Asuncion


    Presents a bibliography and suggests a number of topics around which a college level history course on Latin American women could be organized. Course topics include migration of women, definition of sex roles, legal status of women, women's work and society, feminism, politics, religion, women and the family, and women's education and…

  9. Environmental History in the American West. (United States)

    Rothman, Hal K.


    Asserts that environmental history is an important component of the history of the American west. Discusses the historiography of the American west in relationship to environmental issues. Concludes that environmental history opened the door for scholars to study the way human beings interact with the physical world around them. (CFR)

  10. Teaching American History in a Global Context (United States)

    Guarneri; Carl, Ed.; Davis, James, Ed.


    This comprehensive resource is an invaluable aid for adding a global dimension to students' understanding of American history. It includes a wide range of materials from scholarly articles and reports to original syllabi and ready-to-use lesson plans to guide teachers in enlarging the frame of introductory American history courses to an…

  11. Evaluating Professional Development of American History Teachers (United States)

    Kortecamp, Karen; Steeves, Kathleen Anderson


    The first Teaching American History (TAH) grants were made available to K-12 schools from the Department of Education in 2002. They provide money to school systems for three-year projects to form partnerships with area organizations with the goal of increasing the American history knowledge of teachers and students. This study focuses on the…

  12. Teaching American History Evaluation: Final Report (United States)

    Weinstock, Phyllis; Tseng, Fannie; Humphrey, Daniel; Gillespie, Marilyn; Yee, Kaily


    In 2001, Congress established the Teaching American History (TAH) program, which seeks to improve student achievement by improving teachers' knowledge, understanding, and appreciation of traditional American history as a separate subject within the core curriculum. Under this program, grants are awarded to local education agencies (LEAs), which…

  13. African-American Women in History. (United States)

    Martin, Ron


    Describes two reference books suitable for middle/junior high school library media centers that present information about African-American women and suggests activities for Afro-American History Month. Library media skills objectives, social studies and art objectives, grade levels, resources, instructional roles, activities and procedures,…

  14. Reconstructing Native American population history. (United States)

    Reich, David; Patterson, Nick; Campbell, Desmond; Tandon, Arti; Mazieres, Stéphane; Ray, Nicolas; Parra, Maria V; Rojas, Winston; Duque, Constanza; Mesa, Natalia; García, Luis F; Triana, Omar; Blair, Silvia; Maestre, Amanda; Dib, Juan C; Bravi, Claudio M; Bailliet, Graciela; Corach, Daniel; Hünemeier, Tábita; Bortolini, Maria Cátira; Salzano, Francisco M; Petzl-Erler, María Luiza; Acuña-Alonzo, Victor; Aguilar-Salinas, Carlos; Canizales-Quinteros, Samuel; Tusié-Luna, Teresa; Riba, Laura; Rodríguez-Cruz, Maricela; Lopez-Alarcón, Mardia; Coral-Vazquez, Ramón; Canto-Cetina, Thelma; Silva-Zolezzi, Irma; Fernandez-Lopez, Juan Carlos; Contreras, Alejandra V; Jimenez-Sanchez, Gerardo; Gómez-Vázquez, Maria José; Molina, Julio; Carracedo, Angel; Salas, Antonio; Gallo, Carla; Poletti, Giovanni; Witonsky, David B; Alkorta-Aranburu, Gorka; Sukernik, Rem I; Osipova, Ludmila; Fedorova, Sardana A; Vasquez, René; Villena, Mercedes; Moreau, Claudia; Barrantes, Ramiro; Pauls, David; Excoffier, Laurent; Bedoya, Gabriel; Rothhammer, Francisco; Dugoujon, Jean-Michel; Larrouy, Georges; Klitz, William; Labuda, Damian; Kidd, Judith; Kidd, Kenneth; Di Rienzo, Anna; Freimer, Nelson B; Price, Alkes L; Ruiz-Linares, Andrés


    The peopling of the Americas has been the subject of extensive genetic, archaeological and linguistic research; however, central questions remain unresolved. One contentious issue is whether the settlement occurred by means of a single migration or multiple streams of migration from Siberia. The pattern of dispersals within the Americas is also poorly understood. To address these questions at a higher resolution than was previously possible, we assembled data from 52 Native American and 17 Siberian groups genotyped at 364,470 single nucleotide polymorphisms. Here we show that Native Americans descend from at least three streams of Asian gene flow. Most descend entirely from a single ancestral population that we call 'First American'. However, speakers of Eskimo-Aleut languages from the Arctic inherit almost half their ancestry from a second stream of Asian gene flow, and the Na-Dene-speaking Chipewyan from Canada inherit roughly one-tenth of their ancestry from a third stream. We show that the initial peopling followed a southward expansion facilitated by the coast, with sequential population splits and little gene flow after divergence, especially in South America. A major exception is in Chibchan speakers on both sides of the Panama isthmus, who have ancestry from both North and South America.

  15. Reconstructing Native American Population History (United States)

    Reich, David; Patterson, Nick; Campbell, Desmond; Tandon, Arti; Mazieres, Stéphane; Ray, Nicolas; Parra, Maria V.; Rojas, Winston; Duque, Constanza; Mesa, Natalia; García, Luis F.; Triana, Omar; Blair, Silvia; Maestre, Amanda; Dib, Juan C.; Bravi, Claudio M.; Bailliet, Graciela; Corach, Daniel; Hünemeier, Tábita; Bortolini, Maria-Cátira; Salzano, Francisco M.; Petzl-Erler, María Luiza; Acuña-Alonzo, Victor; Aguilar-Salinas, Carlos; Canizales-Quinteros, Samuel; Tusié-Luna, Teresa; Riba, Laura; Rodríguez-Cruz, Maricela; Lopez-Alarcón, Mardia; Coral-Vazquez, Ramón; Canto-Cetina, Thelma; Silva-Zolezzi, Irma; Fernandez-Lopez, Juan Carlos; Contreras, Alejandra V.; Jimenez-Sanchez, Gerardo; Gómez-Vázquez, María José; Molina, Julio; Carracedo, Ángel; Salas, Antonio; Gallo, Carla; Poletti, Giovanni; Witonsky, David B.; Alkorta-Aranburu, Gorka; Sukernik, Rem I.; Osipova, Ludmila; Fedorova, Sardana; Vasquez, René; Villena, Mercedes; Moreau, Claudia; Barrantes, Ramiro; Pauls, David; Excoffier, Laurent; Bedoya, Gabriel; Rothhammer, Francisco; Dugoujon, Jean Michel; Larrouy, Georges; Klitz, William; Labuda, Damian; Kidd, Judith; Kidd, Kenneth; Rienzo, Anna Di; Freimer, Nelson B.; Price, Alkes L.; Ruiz-Linares, Andrés


    The peopling of the Americas has been the subject of extensive genetic, archaeological and linguistic research; however, central questions remain unresolved1–5. One contentious issue is whether the settlement occurred via a single6–8 or multiple streams of migration from Siberia9–15. The pattern of dispersals within the Americas is also poorly understood. To address these questions at higher resolution than was previously possible, we assembled data from 52 Native American and 17 Siberian groups genotyped at 364,470 single nucleotide polymorphisms. We show that Native Americans descend from at least three streams of Asian gene flow. Most descend entirely from a single ancestral population that we call “First American”. However, speakers of Eskimo-Aleut languages from the Arctic inherit almost half their ancestry from a second stream of Asian gene flow, and the Na-Dene-speaking Chipewyan from Canada inherit roughly one-tenth of their ancestry from a third stream. We show that the initial peopling followed a southward expansion facilitated by the coast, with sequential population splits and little gene flow after divergence, especially in South America. A major exception is in Chibchan-speakers on both sides of the Panama Isthmus, who have ancestry from both North and South America. PMID:22801491

  16. Situational or Personal: Interest in American History (United States)

    Stewart, Victoria Caterina


    The main purpose of the study was to investigate how individuals with a stated interest in American history described their interest. Understanding interest and the factors influencing interest development in a particular content is important as personal interest has been described as "having a critical role in the learning and development of…

  17. 2000 African American History Month Celebration Luncheon (United States)


    Mack McKinney (left), chief, Programs Resources Management, and Delores Abraham (right), with the Astronaut office, flank one of the posters decorating the Early Space Exploration Conference Center at the KSC Visitor Complex for the 2000 African American History Month Celebration Luncheon. McKinney is chairperson for the event.

  18. Representing African American Women in U.S. History Textbooks (United States)

    Schocker, Jessica B.; Woyshner, Christine


    This article addresses the dearth of African American women in high school U.S. history textbooks. The authors conducted a content analysis of the images in an African American history textbook and found that black women are underrepresented. Women are found in less than 15 percent of the images in the African American history text, while they…

  19. “American” Pictures and (Trans-National Iconographies: Mapping Interpictorial Clusters in American Studies

    Directory of Open Access Journals (Sweden)

    Udo J. Hebel


    Full Text Available Udo J. Hebel examines the recent critical history of visual cultures in American Studies in his essay “‘American’ Pictures and (Trans-National Iconographies: Mapping Interpictorial Clusters in American Studies,” focusing his analysis specifically on “political photography” and the concurrency of contexts that inform his reading of the history of US presidential images. This beautifully researched article, previously published in American Studies Today: New Research Agendas (Heidelberg: Universitätsverlag Winter, 2014, takes up questions related to “tensions” between disciplinary concerns and transdisciplinary potentialities for interpreting the representation of the political inside the framework of transnational American Studies.

  20. History of the american college health association. (United States)

    Mack, Rachel


    Following Dr Edward Hitchcock's lead at Amherst College in 1861, soon other institutions of higher education established physical education departments that evolved into independent college health programs. As the field of college health expanded, leaders from numerous campuses began meeting to share information and discuss formation of a national organization. As a result, the American Student Health Association was founded in 1920 to promote campus health care for students and advance the interests of college health. The name was changed to the American College Health Association in 1948. The past history of this organization has been well documented in the literature, so this review will focus more on ACHA's accomplishments over the past 20 years.(1)(,) (2)(,) (3)(,) (4).

  1. 77 FR 5375 - National African American History Month, 2012 (United States)


    ... Documents#0;#0; ] Proclamation 8776 of January 31, 2012 National African American History Month, 2012 By the President of the United States of America A Proclamation The story of African Americans is a story of... for the better. During National African American History Month, we celebrate the rich legacy...

  2. 75 FR 52318 - Presidential Academies for American History and Civics Education; Congressional Academies for... (United States)


    ... History and Civics Education; Congressional Academies for Students of American History and Civics...), as they apply to projects funded under the Presidential Academies for American History and Civics... for Students of American History and Civics Education program. These regulations,...

  3. The assembly history of the milky way nuclear star cluster

    NARCIS (Netherlands)

    Krause-Feldmeier, A.


    We study the assembly history of the nuclear star cluster in the Milky Way. Dense nuclear star clusters form distinct components in ~75% of nearby galaxies. Because the Milky Way nuclear star cluster is at a distance of only 8 kpc, we can spatially resolve its stellar populations and kinematics much

  4. Assessing the Factorial Structure of High School History Teachers' Perceptions on Teaching American History (United States)

    Liu, Yuanlong; Shen, Jianping; Warren, Wilson J.; Cowart, Lynne E.


    The purpose of the research reported in this paper was to develop a preliminary factorial structure of high school history teachers' perceptions on the most important elements of successful history teaching. The 54-item Teaching American History Perception and Behavior Questionnaire was developed and administered to high school American history…

  5. Sacred and Profane American History: Does It Exist in Textbooks? (United States)

    Henry, Michael


    Tony Waters, a sociologist at California State University, Chico, has raised an interesting issue about the intellectual conflict some of his students experienced when they arrived on campus and enrolled in American history classes. He reported students were perplexed to find there were two kinds of American history--the version they learned in…

  6. 76 FR 6519 - National African American History Month, 2011 (United States)


    ..., 2011 National African American History Month, 2011 By the President of the United States of America A... February 4, 2011 Part II The President Proclamation 8627--National African American History Month, 2011 #0..., there is no progress.'' Progress in America has not come easily, but has resulted from the...

  7. 78 FR 8347 - National African American History Month, 2013 (United States)


    ... Documents#0;#0; ] Proclamation 8930 of January 31, 2013 National African American History Month, 2013 By the President of the United States of America A Proclamation In America, we share a dream that lies at the heart... Nation's history, that dream has gone unfulfilled. For African Americans, it was a dream denied until...

  8. Teaching and Learning African American History in a Multiracial Classroom (United States)

    Chikkatur, Anita


    The author explores the challenges of teaching and learning African American history, a history fraught with uncomfortable implications about contemporary race relations and race-based inequalities. Drawing on various theories of anti-oppressive education, and using data from an ethnographic study conducted in one history classroom, the author…

  9. National Museum of American History's OurStory Program: History, Literature, and Civic Literacy (United States)

    Coquillon, Naomi; Wei, Jenny


    In 1998, the Smithsonian's National Museum of American History, Kenneth E. Behring Center launched OurStory: History through Children's Literature, a history and literacy program series for family visitors to the Museum that was designed to help children and adults enjoy exploring history together. Ten years later, to reach a broader, national…

  10. African-American women and abortion: a neglected history. (United States)

    Ross, L J


    The history of African-American women's efforts to control their fertility is largely unknown. From slavery to the present, the growth rate of the African-American population has been cut in half. Demographers and historians frequently attribute this change to external factors such as poverty, disease, and coerced birth control, rather than the deliberate agency of African-American women. This essay assembles a brief historical record of the ways African-American women have sought to control their fertility through the use of abortion and birth control. It also examines the activism of African-American women in the establishment of family planning clinics and in defense of abortion rights.

  11. History Descending a Staircase: American Historians and American Culture (United States)

    Pells, Richard


    In this article, the author contends that the vast majority of American historians no longer regard American culture--whether high culture or mainstream popular culture--as an essential area of study. The much-vaunted culture turn in the humanities has run its course in one of the first disciplines it influenced. Indeed, most of the books today…

  12. The Sporting Past in American History. (United States)

    Borish, Linda J.


    Discusses the role of sports in U.S. history. Describes primary sources and scholarly articles available for use in integrating sports history into history courses. Addresses questions about sport and society in the United States from the Puritans through the present day. Suggests that sports have been used to limit upward mobility and maintain…

  13. Reconstructing Galaxy Histories from Globular Clusters

    CERN Document Server

    West, M J; Marzke, R O; Jordan, A; West, Michael J.; Cote, Patrick; Marzke, Ronald O.; Jordan, Andres


    Nearly a century after the true nature of galaxies as distant "island universes" was established, their origin and evolution remain great unsolved problems of modern astrophysics. One of the most promising ways to investigate galaxy formation is to study the ubiquitous globular star clusters that surround most galaxies. Recent advances in our understanding of the globular cluster systems of the Milky Way and other galaxies point to a complex picture of galaxy genesis driven by cannibalism, collisions, bursts of star formation and other tumultuous events.

  14. Native Americans in Cold War Public Diplomacy: Indian Politics, American History, and the US Information Agency (United States)

    Denson, Andrew


    This essay examines the depiction of Native Americans by the US Information Agency (USIA), the bureau charged with explaining American politics to the international public during the Cold War. In the 1950s and 1960s, the USIA broadcast the message that Americans had begun to acknowledge their nation's history of conquest and were working to…

  15. Native American History in a Box: A New Approach to Teaching Native American Cultures (United States)

    Helms, Emory C.; Hitt, Austin M.; Schipper, Jason A.; Jones, Adam M.


    This article describes the Native American History in a Box curriculum which is designed to introduce elementary and middle-level students to Native American cultures. The curriculum consists of a five day unit addressing the following concepts pertaining to Native American Nations: settlements, tools, sustenance, pottery, and contact with…

  16. Teaching African-American History in the Age of Obama (United States)

    Millward, Jessica


    When the author proposed a spring course on major topics in African-American history, drawing a large enrollment was her chief concern. She had previously taught the course under a different title at the University of Illinois at Urbana-Champaign, a campus with a sizable African-American presence among students and faculty members. She now teaches…

  17. The Zoot Suit Riots: Exploring Social Issues in American History (United States)

    Chiodo, John J.


    The Zoot Suit Riots provide students with a case study of social unrest in American history. The influx of Latinos into the Los Angeles area prior to World War II created high levels of social unrest between Mexican Americans, military servicemen, and local residences. With large numbers of soldiers stationed in the area during the Second World…

  18. The Sacred and the Profane in American History Curriculum (United States)

    Waters, Tony


    The question of why students think there are two kinds of American history taught--one in the K-12 system and one in the university system--can be examined critically using Emile Durkheim's (1973) description of the sacred and the profane. The history taught in K-12 classrooms often focuses on idealized accounts of the past that protect the status…

  19. Learning History by Doing: The Laboratory in American Civilization (United States)

    Miller, Zane L.; Shapiro, Henry D.


    Reviews development and first two years' experiences of a laboratory course of inquiry into the nature and processes of American civilization through examination of local history as symptomatic history. Faculty, graduate fellows, and advanced undergraduates collaborated on research and analysis of the relationship of culture, environment, and…

  20. Evaluating American History Teachers' Professional Development: Effects on Student Learning (United States)

    De La Paz, Susan; Malkus, Nathaniel; Monte-Sano, Chauncey; Montanaro, Elizabeth


    The United States government has invested nearly one billion dollars in funding to professional historians and history educators across the country since 2000 to strengthen the teaching of American history in elementary and secondary schools, yet we know little about how these programs impact student learning. Using data from one such Teaching…

  1. Mapping Early American History: Beyond What Happened Where (United States)

    Milson, Andrew J.


    American history demands to be mapped. The stories of exploration, the colonies, the Louisiana Purchase, and so on are incomplete without maps to locate historical places, events, and conflicts. Yet maps can do more for the history teacher than simply illustrating what happened where or what territory was acquired when. Maps also provide clues…

  2. The American Psychiatric Association and the history of psychiatry. (United States)

    Hirshbein, Laura


    The history committee within the American Psychiatric Association was actively involved in the history of psychiatry in the early decades of the twentieth century, as well as from 1942 to 2009.This paper explores the role of this committee in the context of changes in the psychiatric profession over the twentieth century.

  3. Latin American History: Concerns and Conflicts. (United States)

    Grover, Mark L.


    Examines increased interest in Latin American studies initiated by Cuban Revolution of Fidel Castro. Identifies and compares older historiography which evolved in Latin America and newer efforts which have emanated from the United States. Suggests that a changing political and economic climate and different emphasis in methodology are affecting…

  4. KSC kicks off African-American History Month (United States)


    Mack McKinney, chief, program resources management at NASA and chairperson for African-American History Month, presents a plaque to Bhetty Waldron at the kick-off ceremony of African-American History Month on Feb. 3 at the NASA Training Auditorium. The award was given in thanks for Waldron's portrayal of Dr. Mary McLeod Bethune and Zora Neal Hurston during the ceremony. The theme for this year's observation is 'Heritage and Horizons: The African-American Legacy and the Challenges of the 21st Century.' February is designated each year as a time to celebrate the achievements and contributions of African Americans to Kennedy Space Center, NASA and the nation.

  5. A Brief History of American Drug Control. (United States)

    Musto, David F.


    Traces the history of drug control in the United States from the extensive consumption of opium, heroin, and cocaine before World War I to the popularity of marijuana and LSD during the 1960s. Discusses public concern over drug use that seems to peak following periods of widespread drug use that is linked to foreign influences. (DK)

  6. Teaching American History through the Novel. (United States)

    Bannister, Sharon; Wells, Twyla R.

    This reproducible manual contains over 300 outlines of novels for use by middle-school, junior-high, and senior high school teachers and students of U.S. history and literature. Novel types found in this manual are historical, biographical, classical, and utopian. The book provides an introduction, suggestions on how to use the book, and ideas for…

  7. Evaluation of the Teaching American History Program (United States)

    Humphrey, Daniel C.; Chang-Ross, Christopher; Donnelly, Mary Beth; Hersh, Lauren; Skolnik, Heidi


    Nearly 20 years ago, the first national assessment of student achievement in U.S. history yielded disappointing results. Although policy-makers and researchers expressed great concern about the low scores, the federal government did not undertake large-scale efforts to address poor student performance, and few research dollars were dedicated to…

  8. A Bibliography of American Peace History. (United States)

    Howlett, Charles


    Provides a comprehensive annotated listing of resources for the study and teaching of "peace history." Resources are divided into nine categories: (1) finding aids and broad surveys; (2) archives; (3) secondary sources; (4) monographs; (5) international studies; (6) individual figures; (7) pacifist organizations; (8) insider accounts;…

  9. The art of Indigenous Americans and American art history: a century of exhibitions


    Berlo, Janet Catherine


    The indigenous arts of the United States have long stood in a vexed relationship with the canons of American art history. This brief essay covers only the highlights of this relationship, by considering some major exhibits and installations of Native art in American art museums (and, occasionally, in other exhibition spaces) during the past century. I make these comments as an art historian who has for more than three decades focused on Native American art, with some contributions to others a...

  10. Tracing the merger history of MACS clusters using the GMRT

    CERN Document Server

    Paul, S; Intema, H T


    Galaxy-cluster merger shocks efficiently accelerate the ambient electrons through diffusive shock acceleration and amplify magnetic field by compressing the Inter Cluster Medium. As a result, such objects produce a significant amount of synchrotron radio emission. Radio halo and Mpc scale peripheral radio relics thus help us to trace back the cluster formation history. To study the dynamical state of the galaxy clusters and their relation to the merging scenario, as a pilot project, we thus observed four suitable candidates from the MACS (Massive Cluster Survey) cluster sample. Observations were carried out simultaneously at 610 and 235 MHz with the GMRT. We observed a rare phenomena in the cluster MACSJ0014.3-3022, which hosts both a peripheral spectacular radio relic and an unusually flat spectrum central giant radio halo of more than 1.5 Mpc dimension. We also report that another cluster MACSJ0152.5-2852 is possibly showing the sign of one of the earliest and young merging system where, we saw a faint 0.5 ...

  11. Exploring 350 Years of Jewish American History on the Internet (United States)

    Berson, Michael J.; Cruz, Barbara C.


    The recent Library of Congress exhibition, From Haven to Home: 350 Years of Jewish Life in America, has sparked renewed interest in the history of Jews in the United States. The collection featured more than 200 documents, images, and artifacts that chronicle the Jewish American experience. In exhibit from September through December 2004, From…

  12. How to Find Out in: American History. Revised (United States)

    Hogan, Jeanne

    This library handbook is a guide for the student of American History. It lists some of the more useful materials and reference books basic to general research and gives their location in the Fogler Library at the University of Maine. Materials are listed in seven categories: (1) guides to the literature; (2) encyclopedias and dictionaries; (3)…

  13. Hate Speech: The History of an American Controversy. (United States)

    Walker, Samuel

    Noting that no other country in the world offers protection to offensive speech, this book provides a comprehensive account of the history of the hate speech controversy in the United States. The book examines the issue, from the conflicts over the Ku Klux Klan in the 1920s and American Nazi groups in the 1930s, to the famous Skokie, Illinois…

  14. The Selling of Clio: American History College Survey Textbooks. (United States)

    Chesson, Michael B.


    Reviews the treatment of 15 different, often unrelated topics and eras, as found in the first volumes of 19 widely-used U.S. history survey textbooks. Topics reviewed include Jamestown, American slavery, the Constitution, and Fort Sumter. The review focuses on factual errors, questionable interpretations, boring prose, and the question of…

  15. Podcasting in an Eighth-Grade American History Class (United States)

    Davis, Patrick D.


    The purpose of this study was to see how students used podcasts in an eighth-grade American history unit and the value they placed on them as an educational tool. The 6-week study was conducted in a suburban middle school in a district that is part of a large metropolitan area in Texas. Participants included 29 students and 2 eighth-grade…

  16. "Using history to make slavery history": the African American past and the challenge of contemporary slavery


    James B. Stewart


    This article argues that contemporary antislavery activism in the United States is programmatically undermined and ethically compromised unless it is firmly grounded in a deep understanding of the African American past. Far too frequently those who claim to be “the new abolitionists” evince no interest in what the original abolitionist movement might have to teach them and seem entirely detached from a U.S. history in which the mass, systematic enslavement of African Americans and its consequ...

  17. Space-time clusters of breast cancer using residential histories

    DEFF Research Database (Denmark)

    Nordsborg, Rikke Baastrup; Meliker, Jaymie R; Ersbøll, Annette Kjær


    selected from the Civil Registration System. Residential addresses of cases and controls from 1971 to 2003 were collected from the Civil Registration System and geo-coded. Q-statistics were used to identify space-time clusters of breast cancer. All analyses were carried out with both control groups......BACKGROUND: A large proportion of breast cancer cases are thought related to environmental factors. Identification of specific geographical areas with high risk (clusters) may give clues to potential environmental risk factors. The aim of this study was to investigate whether clusters of breast...... cancer existed in space and time in Denmark, using 33 years of residential histories. METHODS: We conducted a population-based case-control study of 3138 female cases from the Danish Cancer Registry, diagnosed with breast cancer in 2003 and two independent control groups of 3138 women each, randomly...

  18. The Archives of the History of American Psychology: An Interview with David B. Baker. (United States)

    Prieto, Loreto R.


    Presents an interview with David B. Baker, Director of the Archives of the History of American Psychology. Covers topics such as: Baker's interest in the history of psychology, his work at the Archives of the History of American Psychology, and recommendations for teachers when addressing history in non-history courses. (CMK)

  19. Reading, Interpreting, and Teaching African American History: Examining How African American History Influences the Curricular and Pedagogical Decisions of Preservice Teachers (United States)

    King, LaGarrett Jarriel


    African American history and how it is taught in classroom spaces have been a point of contention with activists, historians, and educators for decades. In it current form, African American history narratives often are ambiguous and truncated, leaving students with a disjointed construction about U.S. history. Additionally, the pedagogical…

  20. A spacefaring nation - Perspectives on American space history and policy (United States)

    Collins, Martin J. (Editor); Fries, Sylvia D. (Editor)


    The present volume on perspectives on American space history and policy discusses decision-making, space science and scientific communities, postwar aeronautical research in the federal laboratory, and civilian and military remote sensing and reconnaissance. Attention is given to the interpenetration of science, technology, and politics; space 'sociology'; and space technology and planetary science from 1950 to 1985. Other topics addressed include the aeronautics infrastructure as it applies to aeronautics history, the Lewis Research Center and its transition to space, the relationship between NASA and the users of earth resources data, and methodology for researching a classified system for space reconnaissance.

  1. Siting epidemic disease: 3 centuries of American history. (United States)

    Rosenberg, Charles E


    Epidemics of infectious disease have always played a role in American history, and such epidemics are sited in time and place and configured in terms of ecology and demography, available medical knowledge, and cultural values and collective experience. The mix of these variables has changed dramatically since the theocratic world of 17th-century New England, but the relevance of each remains. Avian influenza already exists virtually in Western society in terms of planning, global networks, laboratory research, social expectations, media representations, and a specific shared history based on the memory of the 1918 influenza pandemic.

  2. Ancient DNA perspectives on American colonization and population history. (United States)

    Raff, Jennifer A; Bolnick, Deborah A; Tackney, Justin; O'Rourke, Dennis H


    Ancient DNA (aDNA) analyses have proven to be important tools in understanding human population dispersals, settlement patterns, interactions between prehistoric populations, and the development of regional population histories. Here, we review the published results of sixty-three human populations from throughout the Americas and compare the levels of diversity and geographic patterns of variation in the ancient samples with contemporary genetic variation in the Americas in order to investigate the evolution of the Native American gene pool over time. Our analysis of mitochondrial haplogroup frequencies and prehistoric population genetic diversity presents a complex evolutionary picture. Although the broad genetic structure of American prehistoric populations appears to have been established relatively early, we nevertheless identify examples of genetic discontinuity over time in select regions. We discuss the implications this finding may have for our interpretation of the genetic evidence for the initial colonization of the Americas and its subsequent population history.

  3. Thermal and Shock Histories of Gas in Galaxy Clusters (United States)

    Benjamin, Sarah; Nagai, D.; Wetzel, A. R.


    Galaxy clusters are the most recently formed cosmological objects in the universe, making them ideal for studying the interplay between cosmology and baryonic physics in structure formation. Understanding their formation and growth requires not only an understanding of the baryonic physics, but also the detailed dynamics of how gas accretes from cosmic filaments onto a cluster throughout its lifetime. One of the outstanding questions concerning galaxy clusters currently is the baryon deficit in their interior as well as non-equilibrium phenomena (such as turbulence and gas clumping) in the virialization regions. Recent X-ray and microwave observations have revealed detailed thermodynamic structure of the cluster hot gas from the core to their virial radii, making comparisons of gas accretion in simulations to observations a strong cosmological probe. In this work, we focus on quantifying gas accretion in non-radiative cosmological simulations of galaxy clusters, where the only significant changes in entropy will be due to shock heating. In order to track each gas element, we implemented a tracer particle module in the Adaptive Refinement Tree cosmological simulation code. By following the thermal histories of each tracer particle, we measure the Mach number of every shock the particle experienced and identify periods of significant shock-heating. Combining this with measurements of how the temperature distribution of regions of the halo change over time, we then investigate whether gas had significantly different histories based on whether they accrete straight from the cosmic background or by first accreting onto a subhalo, the change in accretion due to the mass of the final main halo, and the disruptive effect mergers have on the smooth accretion process. We discuss implications of our results for understanding recent deep Chandra X-ray observations of Abell 133 which revealed several unexpected structural features connected to its gas accretion, including a

  4. Digital History: Using the Internet to Enhance African American Studies in the Secondary School (United States)

    Scheuerell, Scott; Jaeger, Matt


    The authors discuss how high school students participated in a unit in which they learned about African American history in a 1:1 computer classroom--in particular, how they were able to use digital history to learn about a variety of African American leaders who are not frequently covered in the traditional American History textbook. In addition,…

  5. 77 FR 52058 - Notice of Inventory Completion: American Museum of Natural History, New York, NY; Correction (United States)


    ... National Park Service Notice of Inventory Completion: American Museum of Natural History, New York, NY... completion of an inventory of human remains in the possession of the American Museum of Natural History, New... following sentence: Officials of the American Museum of Natural History have determined that, pursuant to...

  6. 76 FR 43712 - Notice of Inventory Completion: American Museum of Natural History, New York, NY (United States)


    ... National Park Service Notice of Inventory Completion: American Museum of Natural History, New York, NY AGENCY: National Park Service, Interior. ACTION: Notice. SUMMARY: The American Museum of Natural History... human remains may contact the American Museum of Natural History. Repatriation of the human remains...

  7. 3 CFR 8345 - Proclamation 8345 of February 2, 2009. National African American History Month, 2009 (United States)


    ... African American History Month, 2009 8345 Proclamation 8345 Presidential Documents Proclamations Proclamation 8345 of February 2, 2009 Proc. 8345 National African American History Month, 2009By the President of the United States of America A Proclamation The history of African Americans is unique and...

  8. British and American History in English Extensive Reading

    Institute of Scientific and Technical Information of China (English)



    <正>In this part,we mainly talk about British and American history in English Extensive Reading.There are some information related to the text"A Useful Stick".London ranks as one of the world’s oldest and most historic cities.It is the capital of the United Kingdom of Great Britain and Northern Ireland.The city was founded about 43A.D.,when the armies of the Roman Empire conquered Britain.

  9. Tabanidae (Diptera) of the American Museum of Natural History Collection. (United States)

    Henriques, Augusto Loureiro


    A checklist of Tabanidae in the American Museum of Natural History was compiled. Over 9,000 specimens were studied. The currently accepted taxa names have been listed based on general catalogs and recent publications. Where possible, modern locality names are given and determiners of each species are provided. A total of 882 species are listed in alphabetical order; including 52 primary and 219 secondary types. The collection includes a substantial global representation of species records for this family.

  10. Latin American Economic History, Business History and Economics of Enterprise: Current trends

    Directory of Open Access Journals (Sweden)

    Araceli Almaraz


    Full Text Available Recent studies about Latin American business are worried about their position on the emerging and global economies. In this article we want to remark the important role of the universities, institutes, schools, and research centers in Latin America that make possible the research work and the publication of Bulletins, Journals and books on business history. In this way, we observe the recent activities of associations and international groups that focus in Latin American Business History in the last twenty five years. We identify the advances and goals in this arena and agreed with Carlos Davila about the thematic diversity and the need to achieve methodological rigor and theoretical propositions. For this reason, we emphasize the historical role of Latin American enterprises and the role of the family business, and their position in the global economies. This article has a double aim, on the one hand, we offer an overview and a state of the art about Latin American Business History. And, on the other hand, we emphasize, within the field of Latin American business, emergent studies that show the potential of this discipline to participate in broader debates about innovation, corporate governance and learning.

  11. The Depiction of Native Americans in Recent (1991-1998) Secondary American History Textbooks. (United States)

    Sanchez, Antonio R.

    As a follow-up to studies by R. Costo and J. Henry (1970) and J. Loewen (1995), this study examined 12 current secondary level U.S. history textbooks to evaluate their accuracy in depicting Native Americans. The criteria embodied an authenticity guideline based upon the "Five Great Values" (generosity and sharing, respect for elders and…

  12. Keeping Current. African American History Month--More than Book Reports! (United States)

    O'Neal, Anita J.


    Mention the observance of African American History Month and the name Carter G. Woodson immediately comes to mind. Woodson, an educator, publisher, and historian, initiated the "Negro History Week" observance in 1926. Known as the "Father of Black History," Woodson believed that it was important for African Americans to know their history in…

  13. History of Science Web Resources at American Institute of Physics (United States)

    Good, G. A.


    The Center for History of Physics and the associated Niels Bohr Library & Archives at the American Institute of Physics were pioneers in web resource development for education and for research in the 1990s. While these units of AIP continue to add significantly to the traditional ways of putting content before the public, they are also experimenting with blogs and Facebook, and are looking at other forms of interactive web presence. This talk explores how an active research center is trying to do both.

  14. A Comparative Study of History Interests between American and Chinese College Students (United States)

    Dan, Yong-jun; She, Xiao-bo; Lan, William


    The purpose of this study was to compare the history interests between American and Chinese college students. Research studies have consistently shown that American students have very limited knowledge on their country's history. American college students usually do better than K-12 students, but their scores are still low. To address the issue,…

  15. Effects of Multimedia Software on Achievement of Middle School Students in an American History Class (United States)

    Kingsley, Karla V.; Boone, Randall


    This study investigated social studies achievement as a result of utilizing a multimedia-based American history software program (Ignite Early American History, 2003) to augment textbook and lecture materials for seventh-grade middle school history students in an ethnically and linguistically diverse urban school district. The instructional…

  16. Rare Exceptions: Some University Professors and the Teaching of Native American History, 1900-1970 (United States)

    Crum, Steven


    From 1900 to 1970, only eight United States historians established courses on Native American history in history departments at the college and university level. This made them rare exceptions in an academic world that placed overwhelming emphasis on mainstream Euro-American history, with extremely limited attention to race and ethnicity. Except…

  17. American plastic surgery and global health: a brief history. (United States)

    Hughes, Christopher D; Alkire, Blake; Martin, Christine; Semer, Nadine; Meara, John G


    Access to essential surgical care in resource-poor settings is gaining recognition as a major component of international public health efforts. As evidence is mounting about the burden of surgically treatable disease in low- and middle-income countries, so too is the evidence for the significant need for plastic surgery treatment of disease rising in these areas. American plastic surgery has a long history with international surgical efforts in resource-poor regions around the world. Early experiences were not formalized until after World War II, when a foundation partnership provided a venue for interested plastic surgeons to volunteer. These efforts progressed and advanced throughout the 1960s-1970s, but were ultimately devastated by the Vietnam War. Subsequent international plastic surgical experiences by American surgeons over the last 40 years have been largely through several nongovernmental organizations. American plastic surgical involvement in global surgery has changed significantly over the last 70 years. Although quality care is being delivered to resource-poor regions around the world, many of the challenges of regionally appropriate, sustainable care persist today.

  18. History Matters: What Happens When African Americans Confront Their Difficult Past. (United States)

    Seitz, Phillip


    History and Reconstruction is an interdisciplinary project to assess the impact of African American history education for black men. Under the theory of trauma recovery, leading scholars of African American history worked with a group of ten ex-offenders, supported by the services of a psychologist and an African American cultural expert and storyteller. Results based on psychological testing and qualitative feedback showed that history can be a catalyst for personal development and transformation. It also demonstrated that difficult history can be taught and assimilated for audience benefit. History and Reconstruction was supported by the Pew Center for Arts and Heritage.

  19. Fluorine abundances and the puzzle of globular cluster chemical history

    CERN Document Server

    de Laverny, P


    The abundance of fluorine in a few Galactic globular clusters is known to strongly vary from star-to-star. These unexpected chemical properties are an additional confirmation of the chemical inhomogeneities already found in several GC, and probably caused by the first generations of stars formed in these systems. The aim of this article is to complement our understanding of the F-behaviour in GC stars and to look for new constraints on the formation histories of their multiple stellar populations. We have collected near-IR spectra of 15 RGB stars belonging to GC spanning a wide range of metallicity: 47 Tuc, M4, NGC6397 and M30. F, Na and Fe abundances have been estimated by spectral synthesis. No anticorrelation between F and Na abundances are found for the most metal-rich cluster of the sample (47 Tuc). In this GC, RGB stars indeed exhibit rather small differences in [F/Fe] unlike the larger ones found for the [Na/Fe] ratios. This reveals a rather inhomogeneous stellar system and a complex chemical evolution...

  20. The Utilization of Local History in Teaching American Religious History: A Gilded Age and Progressive Era North Dakota Case Study (United States)

    Price, Christopher Neal


    Teachers of college-level courses on American religious history generally leave out the importance of local and regional histories when telling the story of religion in America. The study of local history provides a fertile ground for understanding broad national trends in a local context. This dissertation focuses upon a little-studied religious…

  1. North American regional climate reconstruction from ground surface temperature histories (United States)

    Jaume-Santero, Fernando; Pickler, Carolyne; Beltrami, Hugo; Mareschal, Jean-Claude


    Within the framework of the PAGES NAm2k project, 510 North American borehole temperature-depth profiles were analyzed to infer recent climate changes. To facilitate comparisons and to study the same time period, the profiles were truncated at 300 m. Ground surface temperature histories for the last 500 years were obtained for a model describing temperature changes at the surface for several climate-differentiated regions in North America. The evaluation of the model is done by inversion of temperature perturbations using singular value decomposition and its solutions are assessed using a Monte Carlo approach. The results within 95 % confidence interval suggest a warming between 1.0 and 2.5 K during the last two centuries. A regional analysis, composed of mean temperature changes over the last 500 years and geographical maps of ground surface temperatures, show that all regions experienced warming, but this warming is not spatially uniform and is more marked in northern regions.

  2. A history of the American Society for Clinical Investigation. (United States)

    Howell, Joel D


    One hundred years ago, in 1909, the American Society for Clinical Investigation (ASCI) held its first annual meeting. The founding members based this new society on a revolutionary approach to research that emphasized newer physiological methods. In 1924 the ASCI started a new journal, the Journal of Clinical Investigation. The ASCI has also held an annual meeting almost every year. The society has long debated who could be a member, with discussions about whether members must be physicians, what sorts of research they could do, and the role of women within the society. The ASCI has also grappled with what else the society should do, especially whether it ought to take a stand on policy issues. ASCI history has reflected changing social, political, and economic contexts, including several wars, concerns about the ethics of biomedical research, massive increases in federal research funding, and an increasingly large and specialized medical environment.

  3. American Heroism Incarnated in Different Ways in the History of America%American Heroism Incarnated in DifferentDiirerent Ways in the History of America

    Institute of Scientific and Technical Information of China (English)



    American heroism is a noble spirit of self-sacrifice and a form of courage,for life,for others,for nation,and even for the whole human-being in recent days.It has been incamated in the American history.

  4. Learning Other People's History: Pre-Service Teachers' Developing African American Historical Knowledge (United States)

    King, LaGarrett Jarriel


    Drawing from the historical lens of cultural memory, I examined the development of three social studies pre-service teachers' African American history knowledge. The participants were engaged in a rigorous summer reading program dedicated to learning African American history. This qualitative case study examined both pre and post interpretations…

  5. 77 FR 42365 - Price for the Making American History Coin and Currency Set (United States)


    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF THE TREASURY United States Mint Price for the Making American History Coin and Currency Set AGENCY: United States Mint... for the Making American History Coin and Currency Set. FOR FURTHER INFORMATION CONTACT: B.B....

  6. Adopting and Sustaining Use of New Teaching Strategies for American History in Secondary Classrooms (United States)

    Ragland, Rachel G.


    A study of how middle and high school American history teachers adopted and maintained the use of research-based instructional practices is described as a model of professional development for social studies teachers. The teachers participated in a three-year project funded by the U.S. Department of Education's Teaching American History grant…

  7. American Indian History and Writing from Home: Constructing an Indian Perspective (United States)

    Fixico, Donald L.


    If the typical premise of American Indian history is actually the history of Indian-white relations, then the "other" side of the coin must be turned over for understanding an Indian point of view and what is called "writing from home." Conceptually, "writing from home" is the challenge of historians who are American Indian and who write history…

  8. The Depiction of Native Americans in Recent (1991-2004) Secondary American History Textbooks: How Far Have We Come? (United States)

    Sanchez, Tony R.


    This study examined 15 secondary American history textbooks to evaluate their accuracy in depicting Native Americans as a follow-up to studies by Costo and Henry (1970) and Loewen (1995). The criteria embodied an authenticity guideline based upon the Five Great Values with a rating scale between 1 (lowest) and 5 (highest). The results indicate…

  9. The Japanese American Internment, 1942-45: A Lesson from Recent History. Multicultural Education Resource Series. (United States)

    Washington Office of the State Superintendent of Public Instruction, Olympia. Office for Equity Education.

    Designed for secondary school students, this 3-5 day unit focuses on the legal context of the Japanese-American internment during World War II and can be incorporated into a history unit or used as a case study of the American legal system or American race relations. Four lesson plans are provided. In lesson 1, the historical events of the…

  10. The Assembly History of Globular Cluster Star Streams

    CERN Document Server

    Carlberg, Raymond G


    The early accretion onto the Milky Way of satellite galaxies containing dense star clusters is a likely source of the halo globular clusters and the beginning of their associated stellar streams. The process of infall of a satellite with dynamical friction and subsequent merging is simulated with a simple evolving potential model. King model clusters are initiated within the satellite galaxy on circular orbits in a disk. Merging places the clusters on new orbits that substantially underfill their tidal radii, requiring that some internal relaxation of the clusters must be included to cause them to expand to their new tidal surface and start or continue to produce star streams. A toy model with a simplified Monte Carlo relaxation procedure gives the clusters star particles random velocity kicks at approximately the rate expected from collisional dynamics. The clusters expand and lose stars to evaporation leading to tidal streams that have local properties, including sub-halo gaps, as expected in a static halo....

  11. Girls Like Us: Looking at History through the American Girl Series (United States)

    Philpott, Sarah Lewis


    Quality historical fiction enables readers to imagine what life might have been like for a variety of people, particularly those not typically written about in history texts. Social history of an era is often of particular interest to young students. This article looks at using the American Girl Series to interest students in history and provides…

  12. Those Who Can't, Teach: The Disabling History of American Educators (United States)

    Rousmaniere, Kate


    This essay is an exploratory history of American educators as viewed through the lens of disability studies. By this the author means that she is looking at the history of school teachers with disability as the primary marker of social relations, in much the same way that she and others have looked at the history of education through the primary…

  13. South American Summer Monsoon history recorded in Brazilian speleothems (United States)

    Wang, X.; Auler, A. S.; Edwards, R. L.; Cheng, H.


    We have obtained three high-resolution oxygen isotopic records of cave calcites from Caverna Botuverá, southern Brazil, Gruta do Padre, central Brazil, and Caverna Paraíso, Amazonian Brazil. All three records have chronologies determined by U-Th dates and span the last 90, 20 and 50 thousand years, respectively. Tests for equilibrium conditions show that their oxygen isotopic variations are primarily caused by climate change. The three records thus can provide information about precipitation history and fluctuations of the South American Summer Monsoon along a latitudinal transect from 28° S to 4° S. During the last glacial period, the three oxygen isotopic profiles show abrupt millennial-scale variations, which are anti- correlated with the Chinese speleothem monsoon records and northern high-latitude ice core records. This is likely related to the displacement of the mean position of the intertropical convergence zone and associated asymmetry of Hadley cells, consistent with an oceanic meridional overturning circulation mechanism for driving the abrupt climate events. However, the three records show distinct isotopic patterns in Holocene epoch. The δ18O values in the Botuvera record decrease steadily throughout Holocene, while in the Padre record, the δ18O drops slightly until ~6-7 thousand years ago and then gradually increases until the present. The Paraiso Holocene record is similar to the Padre one, but with a much greater amplitude. Together with Andean ice core and lake records, our observations suggest asynchronous changes in Holocene monsoonal precipitation in South America, possibly related to strengthened zonal tropical air-sea interactions after the melting of the large northern ice sheets.

  14. The star cluster - field star connection in nearby spiral galaxies. II. Field star and cluster formation histories and their relation

    CERN Document Server

    Silva-Villa, Esteban


    Recent studies have started to cast doubt on the assumption that most stars are formed in clusters. Observational studies of field stars and star cluster systems in nearby galaxies can lead to better constraints on the fraction of stars forming in clusters. We aim to constrain the amount of star formation happening in long-lived clusters for four galaxies through the homogeneous study of field stars and star clusters. Using HST/ACS-WFPC2 images of the galaxies NGC45, NGC1313, NGC5236 and NGC7793, we estimate star formation histories by means of the synthetic CMD method. Masses and ages of star clusters are estimated using simple stellar population model fitting. Comparing observed and modeled luminosity functions we estimate cluster formation rates. By randomly sampling the stellar IMF, we construct artificial star clusters and quantify how stochastic effects influence cluster detection, integrated colors and age estimates. Star formation rates appear to be constant over the past 10-100 Myr. The number of clu...

  15. The environmental history of group and cluster galaxies in a $\\Lambda$CDM Universe

    CERN Document Server

    De Lucia, Gabriella; Poggianti, Bianca; Aragon-Salamanca, Alfonso; Zaritsky, Dennis


    We use publicly available galaxy merger trees, obtained applying semi-analytic techniques to a large high resolution cosmological simulation, to study the environmental history of group and cluster galaxies. Our results highlight the existence of an intrinsic history bias which makes the nature versus nurture (as well as the mass versus environment) debate inherently ill posed. In particular we show that: (i) surviving massive satellites within clusters were accreted later than their less massive counterparts, from more massive haloes; (ii) the mixing of galaxy populations is incomplete during cluster assembly, which creates a correlation between the time a galaxy becomes satellite and its present distance from the cluster centre. The weakest trends are found for the most massive satellites as a result of efficient dynamical friction and late formation times of massive haloes. A large fraction of the most massive cluster members are accreted onto the main progenitor of the final group/cluster as central galax...

  16. Featured Image: Violent History of the Toothbrush Cluster (United States)

    Kohler, Susanna


    This stunning composite image shows the components of the galaxy cluster RX J0603.3+4214, located at a redshift of z=0.225. This image contains Chandra X-ray data (red), radio data from the Giant Metrewave Radio Telescope (green), and optical from the Subaru Telescope (background). The shape of the enormous (6.5 million light-years across!) radio relic, shown in green, gives this collection of galaxies its nickname: the Toothbrush Cluster. A team of scientists led by Myungkook James Jee (Yonsei University and University of California, Davis) used Hubble and Subaru to study weak gravitational lensing by the Toothbrush Cluster, in order to determine how the clusters mass is distributed. Jee and collaborators found that most of the dark-matter mass is located in two large clumps on a north-south axis (shown by the white contours overlaid on the image), suggesting that the Toothbrush Cluster is the result of a past merger between two clusters. This violent merger is likely what caused the enormous Toothbrush radio relic. Check out the paper below for more information!CitationM. James Jee et al 2016 ApJ 817 179. doi:10.3847/0004-637X/817/2/179

  17. National History/Transnational Themes: Inaugural Addresses and American Mythology

    DEFF Research Database (Denmark)

    Andersen, Marie


    Amerikansk historie, amerikansk mytologi, amerikansk præsidenttaler, indsættelsestaler, civil religion......Amerikansk historie, amerikansk mytologi, amerikansk præsidenttaler, indsættelsestaler, civil religion...

  18. The Effects of Ability Grouping upon Achievement in Eleventh Grade American History (United States)

    Thompson, Gerald Wayne


    Article sought to answer the question of whether pupils in comparable ability levels, taught in homogeneous and heterogeneous classes, differ significantly in achievement gain in 11th grade American history at the .05 alpha level. (Author/RK)

  19. College Textbooks in American History: Brickbats and Bouquets. (United States)

    Foster, Carrie; Rickert-Epstein, Connie


    Analyzes seven college-level U.S. history survey texts to determine the deteriorating quality of college history textbooks. Focuses on three areas: (1) the simplification of style and content, (2) indications of implicit censorship, and (3) the lack of a thematic structure which would contribute to the students' understanding of history. (LS)

  20. Globular cluster content and evolutionary history of NGC147

    CERN Document Server

    Sharina, Margarita


    We present the results of spectroscopic observations of eight globular cluster candidates in NGC147, a satellite dwarf elliptical galaxy of M31. Our goal is to make a complete inventory of the globular cluster system of this galaxy, determine the properties of their stellar populations, and compare these properties with those of systems of globular clusters in other dwarf galaxies. The candidates were identified on Canada-France-Hawaii telescope photographic plates. Medium resolution spectra were obtained with the SCORPIO spectrograph at the prime focus of the 6m telescope of the Russian Academy of Sciences. We were able to confirm the nature of all eight candidates, three of which (GC5, GC7, and GC10) are indeed globular clusters, and to estimate evolutionary parameters for the two brightest ones and for Hodge II. The bright clusters GC5 and GC7 appear to have metallicities ([Z/H]~ -1.5- -1.8) that are lower than the oldest stars in the galaxy. The fainter GC Hodge II has a metallicity [Z/H]=-1.1 dex, simila...

  1. Bayesian History Reconstruction of Complex Human Gene Clusters on a Phylogeny

    CERN Document Server

    Vinař, Tomáš; Song, Giltae; Siepel, Adam


    Clusters of genes that have evolved by repeated segmental duplication present difficult challenges throughout genomic analysis, from sequence assembly to functional analysis. Improved understanding of these clusters is of utmost importance, since they have been shown to be the source of evolutionary innovation, and have been linked to multiple diseases, including HIV and a variety of cancers. Previously, Zhang et al. (2008) developed an algorithm for reconstructing parsimonious evolutionary histories of such gene clusters, using only human genomic sequence data. In this paper, we propose a probabilistic model for the evolution of gene clusters on a phylogeny, and an MCMC algorithm for reconstruction of duplication histories from genomic sequences in multiple species. Several projects are underway to obtain high quality BAC-based assemblies of duplicated clusters in multiple species, and we anticipate that our method will be useful in analyzing these valuable new data sets.

  2. A History of Learning Communities within American Higher Education (United States)

    Fink, John E.; Inkelas, Karen Kurotsuchi


    This chapter describes the historical development of learning communities within American higher education. We examine the forces both internal and external to higher education that contributed to and stalled the emergence of learning communities in their contemporary form.

  3. Rethinking American History in a Post-9/11 World. (United States)

    Foner, Eric


    Explores why, following September 11, historical education should provide a framework that eschews pronouncements about our own superiority and prompts greater self-consciousness among Americans and greater knowledge of those arrayed against us. (EV)

  4. The star formation history of the Large Magellanic Cloud as seen by star clusters and stars



    The aim of this work is to test to what extent the star cluster population of a galaxy can be utilised to constrain or estimate the star formation history, with the Large Magellanic Cloud as our testbed. We follow two methods to extract information about the star formation rate from star clusters, either using only the most massive clusters (Maschberger & Kroupa 2007) or using the whole cluster population, albeit this is only possible for a shorter age span. We compare these results with the ...

  5. History of atomic layer deposition and its relationship with the American Vacuum Society

    NARCIS (Netherlands)

    Parsons, G.N.; Elam, J.W.; George, S.M.; Haukka, S.; Jeon, H.; Kessels, W.M.M.; Leskelä, M.; Poodt, P.; Ritala, M.; Rossnagel, S.M.


    This article explores the history of atomic layer deposition (ALD) and its relationship with the American Vacuum Society (AVS). The authors describe the origin and history of ALD science in the 1960s and 1970s. They also report on how the science and technology of ALD progressed through the 1990s an

  6. Oral History and American Advertising: How the "Pepsi Generation" Came Alive. (United States)

    Dreyfus, Carol; Connors, Thomas


    Described is a project in which the Archives Center of the National Museum of American History and the George Meany Memorial Archives analyzed a collection of advertising materials of the Pepsi-Cola USA company and conducted interviews to gather historically valuable information concerning the company. Valuable social history information was…

  7. The New Gateway, an Old Paradox: Immigrants and Involuntary Americans in North Carolina History Textbooks (United States)

    Hilburn, Jeremy; Fitchett, Paul G.


    The authors conducted a content analysis of North Carolina history textbooks to explore how the definition of immigration has changed over the last century. They also examined how immigrant groups and involuntary Americans have been portrayed throughout the state's history. Findings suggest that as a burgeoning gateway state for immigrants, North…

  8. Play and the History of American Childhood: An Interview with Steven Mintz (United States)

    American Journal of Play, 2010


    An authority on the history of American children and families, Steven Mintz is a professor of history at Columbia University, where he also directs the Graduate School of Arts and Sciences Teaching Center. Previously, he was a fellow at the Center for Advanced Study in the Behavioral Sciences at Stanford University and the Moores Professor of…

  9. The Dark Ages of Education and a New Hope: Teaching Native American History in Maine Schools (United States)

    Loring, Donna


    In 2001, the author wrote legislation that required all public schools in Maine to teach Maine Indian history. On June 14 of that year, Gov. Angus King signed "An Act to Require Maine Native American History and Culture in Maine's Schools" into law--the first of its kind in the U.S. What makes the law unique is its requirement that…

  10. Making African American Culture and History Central to Early Childhood Teaching and Learning (United States)

    Boutte, Gloria Swindler; Strickland, Jennifer


    This article provides a conceptualization for including African and African American history in early childhood classrooms. An example of a kindergarten teacher's efforts to counter negative depictions and frequently omitted information in her classroom is shared. While many early childhood educators avoid discussions of history because the…

  11. Setting out the (Un) Welcome Mat: A Portrayal of Immigration in State Standards for American History (United States)

    Journell, Wayne


    This article frames history education as a social construction designed to create a national identity through the inclusion, exclusion, and treatment of various societal groups. Using this lens, the author analyzes curriculum standards from nine states that annually assess student knowledge of American history to better understand the depiction of…

  12. Viewing American History through Native Eyes: Ideas for Sharing a Different Perspective (United States)

    Warren, Carol C.


    A common criticism of American history curricula is that the content mostly relates the activities and accomplishments of Anglo males. The stories and contributions of women and people of color are frequently missing from history textbooks. While authors and publishers have worked in recent times to rectify these omissions, the voice of Native…

  13. Deconstructing Black History Month: Three African American Boys' Exploration of Identity (United States)

    Landa, Melissa Hare


    Every February, schools celebrate Black History Month and teachers teach the grand narrative of famous African Americans such as Martin Luther King, Jr. While the stories communicate bravery, they are also about racism and violence. Here, through narrative inquiry, a teacher deconstructs Black History Month, inviting student responses to stories…

  14. Women in American History: A Series. Book Four, Women in the Progressive Era 1890-1920. (United States)

    Sanders, Beverly

    The document, one in a series of four on women in American history, discusses the role of women in the Progressive Era (1890-1920). Designed to supplement high school U.S. history textbooks, the book is comprised of five chapters. Chapter I describes reformers and radicals including Jane Addams and Lillian Wald who began the settlement house…

  15. Discrimination History, Backlash Fear, and Ethnic Identity among Arab Americans: Post-9/11 Snapshots (United States)

    Nassar-McMillan, Sylvia C.; Lambert, Richard G.; Hakim-Larson, Julie


    The authors examined discrimination history, backlash fear, and ethnic identity of Arab Americans nationally at 3 times, beginning shortly after September 11, 2001. Relations between variables were moderate, and discrimination history and backlash fear were statistically significant predictors of ethnic identity. Implications for acculturation and…

  16. History of American Communication Education: A Selected, Annotated Basic Bibliography. (United States)

    Friedrich, Gustav W.

    Noting that only a fraction of the articles in speech journals have been concerned with the history of speech education in the United States, this annotated bibliography provides a broad guide to the materials necessary for understanding that history. The 45 citations are organized in six sections concerned with: (1) historical background; (2)…

  17. Using Philosophical Liberalism and Philosophical Conservatism as an Organizing Theme in the First Half of the American History Survey (United States)

    Morris, Richard J.


    Since approximately 1970, many historians have been seeking a unifying theme for the American History Survey. Early in the twentieth century, Progressive historians identified class conflict as the main theme in American History, but during the 1950s and 1960s, this view was challenged by the Consensus Schools' assertion that Americans have always…

  18. Spatial Clustering from GALEX-SDSS samples: Star Formation History and large-scale clustering

    CERN Document Server

    Heinis, Sebastien; Szalay, A S; Arnouts, Stephane; Aragon-Calvo, Miguel A; Wyder, Ted K; Barlow, Tom A; Foster, Karl; Friedman, Peter G; Martin, D Christopher; Morrissey, Patrick; Neff, Susan G; Schiminovich, David; Seibert, Mark; Bianchi, Luciana; Donas, Jose; Heckman, Timothy M; Lee, Young-Wook; Madore, Barry F; Milliard, Bruno; Rich, R Michael; Yi, Sukyoung K


    We measure the projected spatial correlation function w_p(r_p) from a large sample combining GALEX ultraviolet imaging with the SDSS spectroscopic sample. We study the dependence of the clustering strength for samples selected on (NUV - r)_abs color, specific star formation rate (SSFR), and stellar mass. We find that there is a smooth transition in the clustering of galaxies as a function of this color from weak clustering among blue galaxies to stronger clustering for red galaxies. The clustering of galaxies within the "green valley" has an intermediate strength, and is consistent with that expected from galaxy groups. The results are robust to the correction for dust extinction. The comparison with simple analytical modeling suggests that the halo occupation number increases with older star formation epochs. When splitting according to SSFR, we find that the SSFR is a more sensitive tracer of environment than stellar mass.

  19. A history of the American College of Medical Quality. (United States)

    Fetterolf, Donald; Brodie, Bridget


    The American College of Medical Quality is a national organization of health care professionals who are interested in the advancement of medical quality as a field. Composed primarily of doctorate-level individuals in medicine, dentistry, and podiatry, it also includes affiliate members in preprofessional training as well as nursing. Origins of the organization date to 1973, when it was first called the American College of Utilization Review Physicians. It is formally recognized by the American Medical Association and holds a seat in its House of Delegates. The College views the advancement of medical quality as a field of study within itself and offers multiple venues for self-education, testing, and professional networking for its members. Recently, rising national awareness of quality in health care as a field of endeavor has elevated enrollment levels and increased interest in the organization.

  20. Fire resistance in American heavy timber construction history and preservation

    CERN Document Server

    Heitz, Jesse


    This volume presents a history of heavy timber construction (HTC) in the United States, chronicling nearly two centuries of building history, from inception to a detailed evaluation of one of the best surviving examples of the type, with an emphasis on fire resistance. The book does not limit itself in scope to serving only as a common history. Rather, it provides critical analysis of HTC in terms of construction methods, design, technical specifications, and historical performance under fire conditions. As such, this book provides readers with a truly comprehensive understanding and exploration of heavy timber construction in the United States and its performance under fire conditions.

  1. Return to Old Times: Rural Romanticism in American Education History. (United States)

    Warren, Donald


    Discusses the rural-urban dichotomy that regularly surfaces in educational history and argues that a full understanding of the role of cities is needed to overcome a rural romanticism that ill-serves public education policy. (CMG)

  2. The Paranoid Style in American History of Science

    Directory of Open Access Journals (Sweden)

    George Reisch


    Full Text Available Historian Richard Hofstadter’s observations about American cold-war politics are used to contextualize Thomas Kuhn’s The Structure of Scientific Revolutions and argue that substantive claims about the nature of scientific knowledge and scientific change found in Structure were adopted from this cold-war political culture

  3. Revolutions: Interdisciplinary Approaches to Teaching Printmaking and Latin American History (United States)

    Kiddy, Elizabeth; Woodward, Kristen T.


    As part of a U.S. Department of Education grant to expand Latin American and Caribbean Studies at Albright College, the authors of this article, one a historian and one an artist, teamed up to teach a course called Revolutions: Art and Revolution in Latin America. In the class, they proposed to combine a studio art printmaking class with Latin…

  4. Comments on the Short History of American Linguistics

    Institute of Scientific and Technical Information of China (English)



    @@ This book is one of the Series of Mordern Linguistics and it is compiled by Z hao Shikai(赵世开).It offers the readers the general picture of American linguist ic developing course. Generally speaking,the content of the book can be roughly divided into three parts.

  5. Sports, Physical Activity and Recreation in Early American History. (United States)

    Ballou, Ralph B.

    Sports and physical recreation activities have been part of American life since the days of the early settlers. Although the settlers were faced with problems of survival, accounts of life in the colonies in the 1600's carry mention of bowling in the streets, play with bows and arrows, and ice skating. Other activities to gain popularity before…

  6. New Perspectives on the History of American Sign Language (United States)

    Shaw, Emily; Delaporte, Yves


    Examinations of the etymology of American Sign Language have typically involved superficial analyses of signs as they exist over a short period of time. While it is widely known that ASL is related to French Sign Language, there has yet to be a comprehensive study of this historic relationship between their lexicons. This article presents…

  7. Teaching Magna Carta in American History: Land, Law, and Legacy (United States)

    Saxe, David W.


    Magna Carta, that great cornerstone of American liberty, has been in the news lately. Put up for sale by three-time U.S. Presidential candidate Ross Perot in December 2007, the 1297 version of Magna Carta displayed in the National Archives was sold to financier David Rubenstein for $21.3 million. While its sale demonstrates the cash value of the…

  8. Customized recommendations for production management clusters of North American automatic milking systems. (United States)

    Tremblay, Marlène; Hess, Justin P; Christenson, Brock M; McIntyre, Kolby K; Smink, Ben; van der Kamp, Arjen J; de Jong, Lisanne G; Döpfer, Dörte


    Automatic milking systems (AMS) are implemented in a variety of situations and environments. Consequently, there is a need to characterize individual farming practices and regional challenges to streamline management advice and objectives for producers. Benchmarking is often used in the dairy industry to compare farms by computing percentile ranks of the production values of groups of farms. Grouping for conventional benchmarking is commonly limited to the use of a few factors such as farms' geographic region or breed of cattle. We hypothesized that herds' production data and management information could be clustered in a meaningful way using cluster analysis and that this clustering approach would yield better peer groups of farms than benchmarking methods based on criteria such as country, region, breed, or breed and region. By applying mixed latent-class model-based cluster analysis to 529 North American AMS dairy farms with respect to 18 significant risk factors, 6 clusters were identified. Each cluster (i.e., peer group) represented unique management styles, challenges, and production patterns. When compared with peer groups based on criteria similar to the conventional benchmarking standards, the 6 clusters better predicted milk produced (kilograms) per robot per day. Each cluster represented a unique management and production pattern that requires specialized advice. For example, cluster 1 farms were those that recently installed AMS robots, whereas cluster 3 farms (the most northern farms) fed high amounts of concentrates through the robot to compensate for low-energy feed in the bunk. In addition to general recommendations for farms within a cluster, individual farms can generate their own specific goals by comparing themselves to farms within their cluster. This is very comparable to benchmarking but adds the specific characteristics of the peer group, resulting in better farm management advice. The improvement that cluster analysis allows for is

  9. Case-control geographic clustering for residential histories accounting for risk factors and covariates

    Directory of Open Access Journals (Sweden)

    Goovaerts Pierre


    Full Text Available Abstract Background Methods for analyzing space-time variation in risk in case-control studies typically ignore residential mobility. We develop an approach for analyzing case-control data for mobile individuals and apply it to study bladder cancer in 11 counties in southeastern Michigan. At this time data collection is incomplete and no inferences should be drawn – we analyze these data to demonstrate the novel methods. Global, local and focused clustering of residential histories for 219 cases and 437 controls is quantified using time-dependent nearest neighbor relationships. Business address histories for 268 industries that release known or suspected bladder cancer carcinogens are analyzed. A logistic model accounting for smoking, gender, age, race and education specifies the probability of being a case, and is incorporated into the cluster randomization procedures. Sensitivity of clustering to definition of the proximity metric is assessed for 1 to 75 k nearest neighbors. Results Global clustering is partly explained by the covariates but remains statistically significant at 12 of the 14 levels of k considered. After accounting for the covariates 26 Local clusters are found in Lapeer, Ingham, Oakland and Jackson counties, with the clusters in Ingham and Oakland counties appearing in 1950 and persisting to the present. Statistically significant focused clusters are found about the business address histories of 22 industries located in Oakland (19 clusters, Ingham (2 and Jackson (1 counties. Clusters in central and southeastern Oakland County appear in the 1930's and persist to the present day. Conclusion These methods provide a systematic approach for evaluating a series of increasingly realistic alternative hypotheses regarding the sources of excess risk. So long as selection of cases and controls is population-based and not geographically biased, these tools can provide insights into geographic risk factors that were not specifically

  10. An academic genealogy on the history of American field primatologists. (United States)

    Kelley, Elizabeth A; Sussman, Robert W


    In this paper, we present the academic genealogy of American field primatologists. The genealogy has been compiled to formally document the historical record of this young field. Data have been collected from three main sources: 1) e-mail surveys, 2) library and Internet research, and 3) verbal communication through forums such as American Association of Physical Anthropology meetings. Lineages of primatologists have been graphically displayed using Microsoft Visio. As of September 2005, 672 names and 239 affiliated universities, organizations and institutions have been recorded in 19 lineages. Five hundred and thirty-eight of the 672 names, 80.1%, are field primatologists. The Hooton/Washburn lineage is the largest; 60.6% of the recorded field primatologists are linked to this lineage. In addition, four of the five professors who have mentored a comparable number of field primatologists at American universities since Washburn are linked to the Hooton/Washburn lineage; and the school where Washburn mentored a majority of his students, UC-Berkeley, continues to have the highest overall graduation record for this subdiscipline. However, the field of primatology has been diversifying since the 1960s, and different universities are now responsible for graduating a substantial number of primatologists. We conclude that while the Hooton/Washburn lineage has remained remarkably homogenous in its anthropological focus, the field is also becoming increasingly enriched by primatologists who have had training in fields such as zoology, psychology, and ecology both in the United States and abroad.

  11. Connecting health and natural history: a failed initiative at the American Museum of Natural History, 1909-1922. (United States)

    Brown, Julie K


    In 1909, curator Charles-Edward Winslow established a department of public health in New York City's American Museum of Natural History (AMNH). Winslow introduced public health as a biological science that connected human health-the modern sciences of physiology, hygiene, and urban sanitation-to the natural history of plants and animals. This was the only time an American museum created a curatorial department devoted to public health. The AMNH's Department of Public Health comprised a unique collection of live bacterial cultures-a "Living Museum"-and an innovative plan for 15 exhibits on various aspects of health. I show how Winslow, facing opposition from AMNH colleagues, gathered scientific experts and financial support, and explain the factors that made these developments seem desirable and possible. I finish with a discussion of how the Department of Public Health met an abrupt and "inglorious end" in 1922 despite the success of its collections and exhibitions.

  12. Eruptive history of the Ubehebe Crater cluster, Death Valley, California (United States)

    Fierstein, Judy; Hildreth, Wes


    A sequence of late Holocene eruptions from the Ubehebe Crater cluster in Death Valley was short-lived, emplacing several phreatomagmatic and magmatic deposits. Seven craters form the main group, which erupted along a north-south alignment 1.5 km long. At least five more make a 500-m east-west alignment west of the main crater group. One more is an isolated shallow crater 400 m south of that alignment. All erupted through Miocene fanglomerate and sandstone, which are now distributed as comminuted matrix and lithic clasts in all Ubehebe deposits. Stratigraphic evidence showing that all Ubehebe strata were emplaced within a short time interval includes: (1) deposits from the many Ubehebe vents make a multi-package sequence that conformably drapes paleo-basement topography with no erosive gullying between emplacement units; (2) several crater rims that formed early in the eruptive sequence are draped smoothly by subsequent deposits; and (3) tack-welded to agglutinated spatter and bombs that erupted at various times through the sequence remained hot enough to oxidize the overlying youngest emplacement package. In addition, all deposits sufficiently consolidated to be drilled yield reliable paleomagnetic directions, with site mean directions showing no evidence of geomagnetic secular variation. Chemical analyses of juvenile components representing every eruptive package yield a narrow range in major elements [SiO2 (48.65-50.11); MgO (4.98-6.23); K2O (2.24-2.39)] and trace elements [Rb (28-33); Sr (1513-1588); Zr (373-404)]. Despite lithologic similarities, individual fall units can be traced outward from vent by recording layer thicknesses, maximum scoria and lithic sizes, and juvenile clast textural variations. This permits reconstruction of the eruptive sequence, which produced a variety of eruptive styles. The largest and northernmost of the craters, Ubehebe Crater, is the youngest of the group. Its largely phreatomagmatic deposits drape all of the others, thicken in

  13. Baseball, Popular Music, and Twentieth-Century American History. (United States)

    Cooper, B. Lee; Walker, Donald E.


    Argues that using popular recordings that feature baseball imagery is an innovative way to introduce students to the pluralistic nature of U.S. life. Outlines a variety of themes that use baseball history to develop concepts about social change, cultural values, and individual achievement. Lists audio recordings that have baseball themes. (DB)

  14. Hanoi and the American War: Two International Histories

    Directory of Open Access Journals (Sweden)

    Geoffrey C. Stewart


    Full Text Available Pierre Asselin, Hanoi’s Road to the Vietnam War, 1954-1965. Berkeley: University of California Press, 2013. 319 pp. $55 (cloth Lien-Hang T. Nguyen, Hanoi’s War: An International History of the War for Peace in Vietnam. Chapel Hill: The University of North Carolina Press, 2012. 444 pp. $34.95 (cloth.

  15. Skinheads. Shaved for Battle. A Cultural History of American Skinheads. (United States)

    Moore, Jack B.

    The origins and history of the skinhead movement in the United States are traced, beginning with their links with skinheads in England and focusing on racist skinheads rather than the less-well-known nonracist skinheads. How skinheads have developed within the larger youth group scenes, their ideas and activities, the role of music in their…

  16. Life Histories of Three Exemplary American Physical Educators (United States)

    Cazers, Gunars


    The purpose of the following article-style dissertation was to present the life histories of three exemplary physical educators, to give them voice, explore ways in which they experienced marginalization, and describe how they persevered in spite of difficulties they experienced in their careers. The participants included (a) Robin, a female…

  17. Student Attitudes toward Technology Enhanced History Education: Comparison between Turkish and American Students

    Directory of Open Access Journals (Sweden)

    Ibrahim Turan


    Full Text Available Teacher and student attitudes towards the technology enhanced instruction plays a critical role in determining its effectiveness. The purpose of the study is to examine Turkish and American students’ attitudes and thoughts toward the use of educational technologies in history courses, and to compare the results to determine whether there are any differences between the attitudes of Turkish and American student. This study was conducted with 197 American students from Upper Saint Claire High school in Pittsburgh, PA, and 214 Turkish students from Konya High school who volutered for this study. The required data for this study were gathered by a 26-item technology questionnaire, which included 7 multiple-choice questions and 19 Likert scale questions. This questionnaire was developed to gather data on five different areas of interest: (1 demographic information, (2 participants’ computer- and Internet-usage skills, (3 the level of technology used in history classrooms, (4 participants’ attitudes toward technology-enhanced history education, and (5 participants’ attitudes toward history. Most of the Turkish and American students rated themselves as being very well experienced on the eight computer- and Internet-usage skills targeted in this study. But the comparison of the data indicated that American students have higher computer- and Internet-usage skills than Turkish students do, and this difference is statistically significant (p = 0.001. Most of the Turkish and American students showed positive attitudes on using educational technologies in history classrooms. A majority of the Turkish and American students stated that they would be able to focus and learn better if more technological materials were used in classroom activities, and this, in turn, would increase their academic achievements.

  18. The star cluster - field star connection in nearby spiral galaxies. II. Field star and cluster formation histories and their relation (United States)

    Silva-Villa, E.; Larsen, S. S.


    Context. Recent studies have started to cast doubt on the assumption that most stars are formed in clusters. Observational studies of field stars and star cluster systems in nearby galaxies can lead to better constraints on the fraction of stars forming in clusters. Ultimately this may lead to a better understanding of star formation in galaxies, and galaxy evolution in general. Aims: We aim to constrain the amount of star formation happening in long-lived clusters for four galaxies through the homogeneous, simultaneous study of field stars and star clusters. Methods: Using HST/ACS and HST/WFPC2 images of the galaxies NGC 45, NGC 1313, NGC 5236, and NGC 7793, we estimate star formation histories by means of the synthetic CMD method. Masses and ages of star clusters are estimated using simple stellar population model fitting. Comparing observed and modeled luminosity functions, we estimate cluster formation rates. By randomly sampling the stellar initial mass function (SIMF), we construct artificial star clusters and quantify how stochastic effects influence cluster detection, integrated colors, and age estimates. Results: Star formation rates appear to be constant over the past 107 - 108 years within the fields covered by our observations. The number of clusters identified per galaxy varies, with a few detected massive clusters (M ≥ 105 M⊙) and a few older than 1 Gyr. Among our sample of galaxies, NGC 5236 and NGC 1313 show high star and cluster formation rates, while NGC 7793 and NGC 45 show lower values. We find that stochastic sampling of the SIMF has a strong impact on the estimation of ages, colors, and completeness for clusters with masses ≤ 103 - 104 M⊙, while the effect is less pronounced for high masses. Stochasticity also makes size measurements highly uncertain at young ages (τ ≲ 108 yr), making it difficult to distinguish between clusters and stars based on sizes. Conclusions: The ratio of star formation happening in clusters (Γ) compared to

  19. The History of American Settlement at Camp Atterbury (United States)


    Fisher 1852:55). The under- story consists of ferns, wildflowers , and under the chestnut oaks green- brier, black huckleberry, blueberry, and painted...Kathleen M. 2002. Women of the Klan: Racism and Gender in the 1920s. Berkeley: University of California Press. Branigin, Elba L. 1913. History of...Bartholomew County Historical Society. David, Bruno, and Julian Thomas, eds. 2008. Handbook of Landscape Archaeology. Walnut Creek, California : Left Coast

  20. Principal host relationships and evolutionary history of the North American arenaviruses


    Cajimat, Maria N. B.; Milazzo, Mary Louise; Hess, Barry D.; Rood, Michael P.; Fulhorst, Charles F.


    A previous study suggested that the genomes of the arenaviruses native to North America are a product of genetic recombination between New World arenaviruses with significantly different phylogenetic histories. The purpose of this study was to extend our knowledge of the principal host relationships and evolutionary history of the North American arenaviruses. The results of this study suggest that the large-eared woodrat (Neotoma macrotis) is a principal host of Bear Canyon virus and that the...

  1. Patterns of family health history communication among older African American adults. (United States)

    Hovick, Shelly R; Yamasaki, Jill S; Burton-Chase, Allison M; Peterson, Susan K


    This qualitative study examined patterns of communication regarding family health history among older African American adults. The authors conducted 5 focus groups and 6 semi-structured interviews with African Americans aged 60 years and older (N = 28). The authors identified 4 distinct patterns of family health history communication: noncommunication, open communication, selective communication (communication restricted to certain people or topics), and one-way communication (communication not reciprocated by younger family members). In general, participants favored open family health history communication, often resulting from desires to change patterns of noncommunication in previous generations regarding personal and family health history. Some participants indicated that they were selective about what and with whom they shared health information in order to protect their privacy and not worry others. Others described family health history communication as one-way or unreciprocated by younger family members who appeared uninterested or unwilling to share personal and family health information. The communication patterns that the authors identified are consistent with communication privacy management theory and with findings from studies focused on genetic testing results for hereditary conditions, suggesting that individuals are consistent in their communication of health and genetic risk information. Findings may guide the development of health message strategies for African Americans to increase family health history communication.

  2. The Constraints of History: Revision and Revolution in American Literary Studies. (United States)

    Carafiol, Peter


    Asserts that rigorous historicism might change the following: (1) American literary study, by dropping the traditional nationalist project; (2) the notion of canon, by abandoning it; (3) and the institutional structure that supports academic literary criticism, by interrogating current critical conversation and, by recuperating its history,…

  3. The Legacy of the Teaching American History Grants: Statues on Easter Island? (United States)

    Olwell, Russell


    It is not too early to ask what legacy the Teaching American History grants will leave behind. Put another way, when all the money is spent, when all the seminars are done, when all the professional development has ended, what evidence will there be that the program ever existed? Will historians in the future look back at the evidence left behind…

  4. Teaching America's Past to Our Newest Americans: Immigrant Students and United States History (United States)

    Dunne, Kerry A.; Martell, Christopher C.


    At one high school outside of Boston, most students look forward to their daily American history class. They love their teacher's regular pop culture references and arrive ready to participate in the lively and contentious debates. Yet, despite Almira's fondness for the teacher and deep commitment to academic success, this class causes her more…

  5. Strategies for Teaching African American History: Musings from the Past, Ruminations for the Future (United States)

    Dagbovie, Pero Gaglo


    The analysis of the existing body of scholarship on the teaching of African American history shows that various new relevant pedagogies should be adopted to utilize the past reflections for future teaching strategies. The author demonstrates the need for a more rigorous scholarship on the philosophies, methodologies and techniques of teaching…

  6. A Novel Approach: Using Fiction by African American Women To Teach Black Women's History. (United States)

    Bunch-Lyons, Beverly A.


    Discusses the use of novels and other works written by African American women as tools for teaching the history of black women in the United States in an undergraduate course. Focuses on specific works used in the course, such as Octavia Butler's "Kindred" and Terry McMillan's "Waiting to Exhale." (CMK)

  7. The Final Report of the Study Committee on American History and Citizenship Education. (United States)

    Massachusetts State Board of Education, Boston.

    Recommendations to increase knowledge of American history and of the rights and responsibilities of citizens among public school students in Massachusetts are outlined and discussed. The recommendations made by the special study committee were based on two state-wide surveys (one of secondary teachers and social studies directors or chairpeople…

  8. Treatment of Japanese-American Internment During World War II in U.S. History Textbooks (United States)

    Ogawa, Masato


    The purpose of this study is to analyze the treatment of Japanese-American internment during World War II in high school United States history textbooks. Four reasons highlight the selection of this topic for study. First, this historical event was selected because a little over a year ago was the 60th anniversary of President Franklin D.…

  9. The National Museum of African American History and Culture: The Vision (United States)

    Bunch, Lonnie G., III


    One challenge many museums cite is unintentional exclusion. There is too much power and respect that museums hold to be exclusive--intentionally or unintentionally. From the outset, the National Museum of African American History and Culture has been a place for everyone. Inclusion is built in its mission and vision. This article discusses how…

  10. A Brief History of the Psychology Course in American High Schools. (United States)

    Benjamin, Ludy T., Jr.


    Traces the history of psychology in the U.S. high school curriculum, beginning with the 19th century, and discussing the role of the American Psychological Association. Focuses on the social and educational contexts that led to changes in the nature of high school psychology classes, concluding with comments about the value of precollege…

  11. The Isotopic History of Western North American Grasslands (United States)

    Crowley, B. E.; Koch, P. L.


    Over the last 20 years, researchers have detected a rise in carbon isotope values of fossil mammals, paleosol minerals, and organic substrates roughly 6 to 8 Ma, which indicates an increase in the relative abundance of C4 grass at localities around the world. Prior research has shown that this increase in C4 abundance did not occur in cool high latitude regions, nor did it occur at sites around the Mediterranean. Similarly, modern California and Nevada do not support native C4 grasses. These states have a water regime similar to the Mediterranean region, with hot and dry summers, and most precipitation occurring during the cool winter months. Because the amount of C4 grass in North American ecosystems correlates positively with growing season temperature, it is not surprising that these western states, which have a winter growing season, do not support C4 plants. This does not necessarily imply, however, that C4 plants have never been favored in these western states. We used the carbon isotope composition of fossil ungulate tooth enamel as a proxy for C4 plant abundance in California and Nevada from 18 Ma to the present. Our carbon isotope data suggest that whereas there are very few native C4 species living in California or Nevada today, C4 plants may have been present in the region as early as the Late Miocene. Furthermore, there is an indication that C4 plants may have increased in abundance in the region during Pleistocene glacial periods.

  12. 75 FR 58425 - Notice of Intent to Repatriate Cultural Items: American Museum of Natural History, New York, NY (United States)


    ... National Park Service Notice of Intent to Repatriate Cultural Items: American Museum of Natural History... intent to repatriate cultural items in the possession of the American Museum of Natural History, New York..., or Federal agency that has control of the cultural items. The National Park Service is...

  13. 75 FR 58426 - Notice of Intent to Repatriate Cultural Items: Thomas Gilcrease Institute of American History and... (United States)


    ... American History and Art (Gilcrease Museum), Tulsa, OK, that meet the definition of objects of cultural... National Park Service Notice of Intent to Repatriate Cultural Items: Thomas Gilcrease Institute of American History and Art, Tulsa, OK AGENCY: National Park Service, Interior. ACTION: Notice. Notice is here...

  14. The History and Future of the Southern Bible Institute: A Post-Secondary School of Biblical Studies for African Americans (United States)

    Cooks, Michael


    The United States of America has a long history in higher education, but one area of its history not exhausted through research involves higher education for African Americans. Specifically, higher education for African Americans in the area of theology or biblical studies presents numerous opportunities for further research. Soon after the…

  15. Backlash against American psychology: an indigenous reconstruction of the history of German critical psychology. (United States)

    Teo, Thomas


    After suggesting that all psychologies contain indigenous qualities and discussing differences and commonalities between German and North American historiographies of psychology, an indigenous reconstruction of German critical psychology is applied. It is argued that German critical psychology can be understood as a backlash against American psychology, as a response to the Americanization of German psychology after WWII, on the background of the history of German psychology, the academic impact of the Cold War, and the trajectory of personal biographies and institutions. Using an intellectual-historical perspective, it is shown how and which indigenous dimensions played a role in the development of German critical psychology as well as the limitations to such an historical approach. Expanding from German critical psychology, the role of the critique of American psychology in various contexts around the globe is discussed in order to emphasize the relevance of indigenous historical research.

  16. From Wilderness to Environment: The Role of ‘Nature’ in Western American History from Frederick Jackson Turner to Donald Worster and the New Western History


    Schiffhauer, Mark


    This dissertation examines the role of ‘nature’ as an analytic concept in Western American History from the emergence of the field at the end of the nineteenth century to the formation of the New Western History in the late 1980s. Starting with an analysis of Frederick Jackson Turner’s concept of the ‘wilderness’ in “The Significance of the Frontier in American History” in 1893, the dissertation traces the evolution of Western ...

  17. The extended star formation history of the star cluster NGC 2154 in the Large Magellanic Cloud

    CERN Document Server

    Baume, G; Costa, E; Méndez, R A; Girardi, L; Baume, Gustavo; Carraro, Giovanni; Costa, Edgardo; B., Rene' A. Mendez; Girardi, Leo


    The color-magnitude diagram (CMD) of the intermediate-age Large Magellanic Cloud (LMC) star cluster NGC 2154 and its adjacent field, has been analyzed using Padova stellar models to determine the cluster's fundamental parameters and its Star Formation History (SFH). Deep $BR$ CCD photometry, together with synthetic CMDs and Integrated Luminosity Functions (ILFs), has allowed us to infer that the cluster experienced an extended star formation period of about 1.2 Gyrs, which began approximately 2.3 Gyr and ended 1.1 Gyr ago. The physical reality of such a prolonged period of star formation is however questionable, and could be the result of inadequacies in the stellar evolutionary tracks themselves. A substantial fraction of binaries (70%) seems to exist in NGC 2154.

  18. Manifest Meanings: The Selling (Not Telling) of American Indian History and the Case of "The Black Horse Ledger" (United States)

    Gercken, Becca


    What is the value or perceived necessity--for an Indian or for a white man--of changing Northern Cheyenne history? How are a reader's conclusions affected by her perception of the race of the person altering that history? Why is it acceptable to sell but not tell American Indian history? An examination of the visual and discursive rhetoric of "The…

  19. The history and visions of African American psychology: multiple pathways to place, space, and authority. (United States)

    Holliday, Bertha Garrett


    The author describes the multiple pathways of events and strategies that served to nurture African American psychology in the United States. Special attention is given to strategies for inclusion and empowerment used in 4 psychological professional and scholarly associations: the American Counseling Association, the American Psychological Association, the Association of Black Psychologists, and the Society for Research in Child Development. In addition, the author describes 4 major intellectual traditions that informed not only the strategies of inclusion but also the theoretical, research, and intervention perspectives and other professional and academic efforts of African American psychologists. Those perspectives are the Afrocentric/African-centered tradition derived from longstanding nationalist/Pan-African and culturally centered traditions within African American communities; the social contextual/multidisciplinary research tradition of the University of Chicago School of Social Science; the empirical social science research tradition of the University of Michigan; and the Black scholar/activist tradition of Howard University. This article also presents a chronological timeline of major events in the history of African American psychology.

  20. Asian Americans in American History: An AsianCrit Perspective on Asian American Inclusion in State U.S. History Curriculum Standards (United States)

    An, Sohyun


    Compared to other groups of color, Asian Americans and their perspectives have rarely been given attention in curriculum studies. This article seeks to address the gap in the literature. It uses AsianCrit, a branch of critical race theory, as a theoretical lens to analyze and explicate common patterns across various states' scripting of Asian…

  1. Post Civil War African American History: Brief Periods of Triumph, and Then Despair. (United States)

    Graff, Gilda


    During Reconstruction, which is often called the most progressive period in American history, African Americans made great strides. By 1868 African American men constituted a majority of registered voters in South Carolina and Mississippi, and by 1870 eighty-five percent of Mississippi's black jurors could read and write. However, Reconstruction was followed by approximately one hundred years of Jim Crow laws, lynching, disenfranchisement, sharecropping, unequal educational resources, terrorism, racial caricatures, and convict leasing. The Civil Rights Revolution finally ended that period of despair, but the era of mass incarceration can be understood as a reaction to the Civil Rights Movement. This article attempts to understand the persistence of racism in the United States from slavery's end until the present.

  2. Fiction as Reconstruction of History: Narratives of the Civil War in American Literature

    Directory of Open Access Journals (Sweden)

    Reinhard Isensee


    Full Text Available Even after more than 140 years the American Civil War continues to serve as a major source of inspiration for a plethora of literature in various genres. While only amounting to a brief period in American history in terms of years, this war has proved to be one of the central moments for defining the American nation since the second half of the nineteenth century. The facets of the Civil War, its protagonists, places, events, and political, social and cultural underpinnings seem to hold an ongoing fascination for both academic studies and fictional representations. Thus, it has been considered by many the most written-about war in the United States.

  3. Violent Inscriptions: Border Crossings in Early Nineteenth-Century American Literary History


    Schilz, Lisa


    AbstractViolent Inscriptions:Border Crossings in Early Nineteenth-Century American Literary HistoryLisa SchilzMy dissertation, Violent Inscriptions: Trauma, Translation, and Trans-nation in the Borderlands, stages convergences among a multilingual, multicultural web of texts and textual traces—Comanche, Ojibwe, Mexican, U.S., German—that thematize and register violence in the early national period. While 1848 has rightly been proclaimed as a (or even the) significant periodizing marker for Am...

  4. The fate of spiral galaxies in clusters: the star formation history of the anemic Virgo cluster galaxy NGC 4569

    CERN Document Server

    Boselli, A; Cortese, L; De Paz, A G; Seibert, M; Madore, B F; Buat, V; Martin, D C


    We present a new method for studying the star formation history of late-type, cluster galaxies undergoing gas starvation or a ram-pressure stripping event by combining bidimensional multifrequency observations with multi-zones models of galactic chemical and spectrophotometricevolution. This method is applied to the Virgo cluster anemic galaxy NGC 4569. We extract radial profiles from recently obtained UV GALEX images at 1530 and 2310 A, from visible and near-IR narrow (Halpha) and broad band images at different wavelengths (u, B, g, V, r, i, z, J, H, K), from Spitzer IRAC and MIPS images and from atomic and molecular gas maps. The model in the absence of interaction (characterized by its rotation velocity and spin parameter) is constrained by the unperturbed H band light profile and by the Halpha rotation curve. We can reconstruct the observed total-gas radial-density profile and the light surface-brightness profiles at all wavelengths in a ram-pressure stripping scenario by making simple assumptions about t...

  5. Juan Comas's summary history of the American association of physical anthropologists (1928-1968). (United States)

    Alfonso, Marta P; Little, Michael A


    This translation of Juan Comas's Summary History of the American Association of Physical Anthropologists was originally published in Spanish by the Instituto Nacional de Antropología e Historia, Mexico, in 1969 (Departamento de Investigaciones Antropológicas, Publication 22). Physical anthropologists from North America and members of the American Association of Physical Anthropologists owe Juan Comas a debt of gratitude for having labored to produce this Summary History of the AAPA. There is much useful and interesting material in this document: extensive endnotes that are helpful to the historian of the profession; an appendix of the Journal issues where the proceedings of annual meetings can be found; a detailed listing of contributors of papers to annual meetings from 1930-1968; a warm acknowledgment and history of the contributions of the Wenner-Gren Foundation to biological anthropology; a history of the Yearbook of Physical Anthropology; and comments on the short-lived PA Newsletter. In addition, there are appendices with the founding AAPA Constitution and By-Laws from 1930 and as they existed in 1968. All of this synoptic information saves the reader with interests in the history of the AAPA considerable effort, especially when few university and college libraries have the full (old and new) series of the AJPA on their shelves. We have tried to provide a translation of Comas's history that is faithful to the original Spanish-language publication. In a few cases, we shortened sentences and applied a slightly more modern usage than was popular in the late 1960s.

  6. Suzaku Observations of Chemical Enrcihment History of Galaxy Cluster A3112 (United States)

    Ezer, Cemile; Nihal Ercan, Enise; Bulbul, Esra


    Galaxy clusters are known as grand reservoir of metals as their intracluster medium (ICM) are gradually enriched by supernova (SN) explosions. The azimuthal and spatial distributions of these metals from cluster's centre out to the virial radius are of vital importance since they record all the information on nucleosynthesis and chemical enrichment history of the formation. In this study, we present results from Suzaku observations of an archetypal cluster A3112 out to ˜1470 kpc. We additionally used overlapping Chandra observations to detect unresolved point sources. We studied the total number of SN explosions and the ratio of type Ia (SN Ia) to core-collapse (SNcc) integrated over the cluster lifetime by directly fitting the X-ray spectra. We investigated almost flat radial distribution of the relative contribution of SN Ia to SNcc and the percentage of SN Ia contributing to ICM is found to be 10%-25%. We also studied the α element (Mg, Si and S) abundances. Ultimate results will be presented and they are expected to unravel the enrichment type of the evolution.

  7. The Hercules Cluster Environment Impact on the Chemical History of Star-Forming Galaxies (United States)

    Petropoulou, V.; VíLchez, J. M.; Iglesias-Páramo, J.; Papaderos, P.

    In this work we study the effects of the Hercules cluster environment on the chemical history of star-forming (SF) galaxies. For this purpose we have derived the gas metallicities, the mean stellar metallicities and ages, the masses and the luminosities of our sample of galaxies. We have found that our Hercules SF galaxies are either chemically evolved spirals with nearly flat oxygen gradients, or less metal-rich dwarf galaxies which appear to be the "newcomers" in the cluster. Most Hercules SF galaxies follow well defined mass-metallicity and luminosity-metallicity sequences; nevertheless significant outliers to these relations have been identified, illustrating how environmental effects can provide a physical source of dispersion in these fundamental relations.

  8. Merged or monolithic? Using machine-learning to reconstruct the dynamical history of simulated star clusters

    CERN Document Server

    Pasquato, Mario


    Context. Machine-Learning (ML) solves problems by learning patterns from data, with limited or no human guidance. In Astronomy, it is mainly applied to large observational datasets, e.g. for morphological galaxy classification. Aims. We apply ML to gravitational N-body simulations of star clusters that are either formed by merging two progenitors or evolved in isolation, planning to later identify Globular Clusters (GCs) that may have a history of merging from observational data. Methods. We create mock-observations from simulated GCs, from which we measure a set of parameters (also called features in the machine-learning field). After dimensionality reduction on the feature space, the resulting datapoints are fed to various classification algorithms. Using repeated random subsampling validation we check whether the groups identified by the algorithms correspond to the underlying physical distinction between mergers and monolithically evolved simulations. Results. The three algorithms we considered (C5.0 tree...

  9. The oral histories of six African American males in their ecology of Advanced Placement Biology (United States)

    Halasa, Katrina Bassam

    The major purpose of this qualitative study was to examine the past in order to understand the complex phenomenon of students engaging in science (Newman, Ridenour, Newman, & DeMarco, 2003) specifically through the oral histories of six self-identified African American males enrolled in a high school Advanced Placement Biology class and the oral histories about events that followed during their post high school experiences. To elucidate an understanding of this phenomenon, this research explored the ecology of African American males' descriptions of their school science, their peer school science community, their lived experiences during and after graduation, and their meso-community (Bronfenbrenner, 1979). Many minority and low-income students are less likely to enroll in rigorous courses during high school (Education Trust, 2006). This study is of utmost importance because capturing the informants' oral histories may improve rigorous science education. Many African American male students are attending urban schools with an ever growing achievement gap among their White counterparts (Norman, Ault, Bentz, & Meskimen, 2001); therefore, they are disengaging in science. As a result, African American males are underrepresented in both science careers and achievements in science (Atwater, 2000; National Science Foundation, 1994). The six oral histories highlighted the ecological factors that affected African American males regarding (1) the impact of their relationship with their mothers, (2) the understanding of personal responsibility, (3) the notion of a scientist, (4) the issue of gender being more of an obstacle than race, (5) the understanding that education is valuable, (6) the interactions and influence of relationships with others on their decisions, (7) the development of integrity through the participation in sports, (8) the ecological neighborhood environment influences an image, (9) the enrollment of Advanced Placement Biology course helped the transition

  10. Bringing dinosaurs back to life: exhibiting prehistory at the American Museum of Natural History. (United States)

    Rieppel, Lukas


    This essay examines the exhibition of dinosaurs at the American Museum of Natural History during the first two decades of the twentieth century. Dinosaurs provide an especially illuminating lens through which to view the history of museum display practices for two reasons: they made for remarkably spectacular exhibits; and they rested on contested theories about the anatomy, life history, and behavior of long-extinct animals to which curators had no direct observational access. The American Museum sought to capitalize on the popularity of dinosaurs while mitigating the risks of mounting an overtly speculative display by fashioning them into a kind of mixed-media installation made of several elements, including fossilized bone, shellac, iron, and plaster. The resulting sculptures provided visitors with a vivid and lifelike imaginative experience. At the same time, curators, who were anxious to downplay the speculative nature of mounted dinosaurs, drew systematic attention to the material connection that tied individual pieces of fossilized bone to the actual past. Freestanding dinosaurs can therefore be read to have functioned as iconic sculptures that self-consciously advertised their indexical content.

  11. Principal host relationships and evolutionary history of the North American arenaviruses. (United States)

    Cajimat, Maria N B; Milazzo, Mary Louise; Hess, Barry D; Rood, Michael P; Fulhorst, Charles F


    A previous study suggested that the genomes of the arenaviruses native to North America are a product of genetic recombination between New World arenaviruses with significantly different phylogenetic histories. The purpose of this study was to extend our knowledge of the principal host relationships and evolutionary history of the North American arenaviruses. The results of this study suggest that the large-eared woodrat (Neotoma macrotis) is a principal host of Bear Canyon virus and that the present-day association of Bear Canyon virus with the California mouse (Peromyscus californicus) in southern California represents a successful host-jumping event from the large-eared woodrat to the California mouse. Together, the results of analyses of viral gene sequence data in this study and our knowledge of the phylogeography of the rodents that serve as principal hosts of the New World arenaviruses suggest that genetic recombination between arenaviruses with significantly different phylogenetic histories did not play a role in the evolution of the North American arenaviruses.

  12. An American health dilemma: a history of blacks in the health system. (United States)

    Byrd, W M; Clayton, L A


    The present black health crisis is a continuum. After 346 years of neglect, flawed efforts were made to admit black Americans to the "mainstream" health system. Gains were significant from 1965 to 1975; however, since then black health status has eroded. Since colonial times, the racial dilemma that affected America's liberal democratic system also distorted medical relationships and institutions. There are clear connections between campaigns to defeat bills that would improve the health of blacks and other disadvantaged groups and acquiescence with the present reassignment of them to the underfunded, overcrowded, inferior, public health-care sector. Physician leadership helped to establish the slaveocracy, create the racial inferiority myths, and build the segregated health subsystem for blacks and the poor. Clearly, if the history-based health disparities are to be resolved, black physician leadership will be necessary. Without justice and equity in health care, the dream of Martin Luther King will never become a reality for African Americans.

  13. The 100 Myr Star Formation History of NGC 5471 from Cluster and Resolved Stellar Photometry

    CERN Document Server

    García-Benito, Rubén; Díaz, Ángeles I; Apellániz, Jesús Maíz; Cerviño, Miguel


    We show that star formation in the giant HII region NGC 5471 has been ongoing during the past 100 Myr. Using HST/WFPC2 F547M and F675W, ground based JHKs, and GALEX FUV and NUV images, we have conducted a photometric study of the star formation history in the massive giant extragalactic HII region NGC 5471 in M101. We perform a photometric study of the colour-magnitude diagram (CMD) of the resolved stars, and an integrated analysis of the main individual star forming clusters and of NGC 5471 as a whole. The integrated UV-optical-nIR photometry for the whole region provides two different reference ages, 8 Myr and 60 Myr, revealing a complex star formation history, clearly confirmed by the CMD resolved stellar photometry analysis. The spatial distribution of the stars shows that the star formation in NGC 5471 has proceeded along the whole region during, at least, the last 100 Myr. The current ionizing clusters are enclosed within a large bubble, which is likely to have been produced by the stars that formed in ...

  14. Resistance and Assent: How Racial Socialization Shapes Black Students' Experience Learning African American History in High School (United States)

    Thornhill, Theodore E.


    African American history is often taught poorly in high school U.S. history courses. However, we know little about how Black students perceive and experience this situation. I use a refined racial socialization framework and interview data with 32 Black college students in the Northeast to investigate how familial racial socialization shapes their…

  15. With an Eye on "We": A Teacher Research Study of Students Using Narrative Inquiry to Critique Mexican American History (United States)

    Luna, Enrique


    The purpose of this teacher research study was to examine narrative inquiry as a method for student engagement with course material and the local community. This study sought to understand how students perceived themselves within Mexican American history. While a number of studies have used oral history and narrative effectively, these studies…

  16. Sharing Our Teachers: The Required Graduate Class at the American Museum of Natural History for Lehman College (CUNY) (United States)

    Aquino, Adriana E.; Kelly, Angela M.; Bayne, Gillian U.


    This reflective study explores the history and outcomes of a teacher education collaboration between the American Museum of Natural History (AMNH) and Lehman College of The City University of New York (CUNY), in the Bronx, NY, USA. AMNH developed and teaches a Lehman course, Museum Resources for Teaching Science, for Master's degree candidates in…

  17. Merged or monolithic? Using machine-learning to reconstruct the dynamical history of simulated star clusters (United States)

    Pasquato, Mario; Chung, Chul


    Context. Machine-learning (ML) solves problems by learning patterns from data with limited or no human guidance. In astronomy, ML is mainly applied to large observational datasets, e.g. for morphological galaxy classification. Aims: We apply ML to gravitational N-body simulations of star clusters that are either formed by merging two progenitors or evolved in isolation, planning to later identify globular clusters (GCs) that may have a history of merging from observational data. Methods: We create mock-observations from simulated GCs, from which we measure a set of parameters (also called features in the machine-learning field). After carrying out dimensionality reduction on the feature space, the resulting datapoints are fed in to various classification algorithms. Using repeated random subsampling validation, we check whether the groups identified by the algorithms correspond to the underlying physical distinction between mergers and monolithically evolved simulations. Results: The three algorithms we considered (C5.0 trees, k-nearest neighbour, and support-vector machines) all achieve a test misclassification rate of about 10% without parameter tuning, with support-vector machines slightly outperforming the others. The first principal component of feature space correlates with cluster concentration. If we exclude it from the regression, the performance of the algorithms is only slightly reduced.

  18. Abandoning evolution. The forgotten history of antievolution activism and the transformation of American social science. (United States)

    Lienesch, Michael


    From its inception, antievolution activism has been aimed not only at the natural sciences but also, and almost as often, at the social sciences. Although almost entirely overlooked by scholars, this activism played a significant part in the development of American social science in the early twentieth century. Analyzing public writings and private papers of antievolution activists, academic social scientists, and university officials from the 1920s, this essay recalls this forgotten history, showing how antievolution activism contributed to the abandonment of evolutionary theory and the adoption of a set of secular, scientific, and professional characteristics that have come to define much of modern social science.

  19. Love Song of the Foreign Liberator: Teaching Tibetan History to American Students in the PRC

    Directory of Open Access Journals (Sweden)

    Adam Cathcart


    Full Text Available This article takes as its point of departure 'Love Song of Kangding '(康定情歌, ''a romantic film from fall 2010 which propagandizes the positive consequences of the liberation of Tibetan cultural areas by the People’s Liberation Army (PLA in 1950-51.  The article describes how the film fit into a semester-long course on contemporary Tibet taught to American students in Chengdu, Sichuan, and the particular sensitivities and difficulties relating to learning about Tibetan history in China.     ''

  20. Teaching Indigenous American Culture and History: Perpetuating Knowledge or Furthering Intellectual Colonization?

    Directory of Open Access Journals (Sweden)

    Michael K. Ward


    Full Text Available Problem statement: This study addresses a number of ongoing and important issues related to teaching the history and culture of Native Americans in the public setting. As part of the social science curriculum, the study and academic interpretations of American Indian culture and history regularly attracts educators and students alike, but remains problematic for reasons of cultural property and identity. Of particular concern are matters related to the accuracy and purposes of such instructional content and problems of cultural representation, cultural boundaries and cultural and/ or intellectual property. A related question concerns problems associated with limiting access to cultural knowledge versus increased demands for open access to information. Approach: By examining the historiography related to this subject and exploring other mainstream and indigenous academic and traditional indigenous perspectives on this topic, the scope of the problem of American Indian cultural misrepresentation can be ascertained, while the complexities of these issues may also be recognized. A key aspect of this study is its emphasis on indigenous perspectives, which often stand in contrast with those of mainstream academic thought on this and related topics. Though legal questions arise from such an examination, the issues addressed here are largely ethical in nature. Results: From traditional indigenous and indigenous academic perspectives, the unauthorized use of ceremonies, sacred songs and stories, or ritual and other material culture objects constitutes a theft of cultural and/ or intellectual property. The fact that this problem persists despite many decades of indigenous criticism indicates the continuation of an overall non-indigenous disregard for American Indian authority. Thus, the perpetuation of cultural misrepresentation and the continued theft of cultural and/ or indigenous intellectual property serves to further the historic process of non

  1. Liberating history: the context of the challenge of psychologists of color to American psychology. (United States)

    Pickren, Wade E


    The history of race and ethnicity in North America is long and complex. It has been fraught with racism and various forms of oppression--intellectual, social, and physical--and defies easy analysis. This article examines the history of race and ethnicity in the United States, and how it played out in the field of psychology. Although other articles in this issue examine the specific impact of racism and internal colonialism on racial and ethnic minorities, this article places these events within an international context, specifically the post-World War II era when oppressed peoples around the world sought liberation from colonial oppressors. The article suggests that the struggles and successes of racial and ethnic minority psychologists may provide the best opportunity for American psychology to connect with emerging indigenous psychologies in other parts of the world, which represent the future of psychology in a globalizing world.

  2. When the Present Took Precedence over the Past: Social Adjustment and the Mainstreaming of American Jewish History in the Supplementary School (United States)

    Krasner, Jonathan


    This paper traces the mainstreaming of American Jewish history and social studies in the American Jewish school curricula, a process which began in the 1920s and picked up momentum in the mid-late 1930s and 1940s. From the beginning, the "raison d'etre" for teaching American Jewish history and community studies was articulated in terms of…

  3. The star cluster - field star connection in nearby spiral galaxies. II. Field star and cluster formation histories and their relation

    NARCIS (Netherlands)

    Silva-Villa, E.; Larsen, S.S.


    Context. Recent studies have started to cast doubt on the assumption that most stars are formed in clusters. Observational studies of field stars and star cluster systems in nearby galaxies can lead to better constraints on the fraction of stars forming in clusters. Ultimately this may lead to a bet

  4. The American Association of Plastic Surgeons Recent History, with a Review of the Past. (United States)

    Lawrence, W Thomas


    The American Association of Plastic Surgeons was founded in 1921 and is the oldest of the plastic surgery societies. It was born out of the enthusiasm of reconstructive surgeons who had recently increased in numbers and expanded the scope of their activities as a result of the challenges posed by battle-injured soldiers during World War I. Early meetings were small, focused exclusively on the head and neck, and often included live surgical demonstrations. The Association has grown in size and scope with time, but it has maintained its academic focus. This article focuses on the most recent 15 years of the Association's history, as prior publications have chronicled the history of the organization up to 2000. The organization has remained robust in the new millennium, with the national meetings being its most prominent activity. The format of the meetings has continually been improved to remain relevant and of interest to the membership and other attendees. The organization continues to support the development of young academic plastic surgeons through the Academic Scholars Program. It has established new programs such as the Constable Fellowship to support international exchange and has also sponsored two consensus conferences to help define standards of care in plastic surgery-related issues. The Association annually recognizes significant contributors to the field through the variety of awards that it bestows as well. The mission of the American Association of Plastic Surgeons is to provide scholarly leadership in plastic surgery, and the organization continues to successfully accomplish this mission.

  5. The Truth about Truth-Telling in American Medicine: A Brief History. (United States)

    Sisk, Bryan; Frankel, Richard; Kodish, Eric; Harry Isaacson, J


    Transparency has become an ethical cornerstone of American medicine. Today, patients have the right to know their health information, and physicians are obliged to provide it. It is expected that patients will be informed of their medical condition regardless of the severity or prognosis. This ethos of transparency is ingrained in modern trainees from the first day of medical school onward. However, for most of American history, the intentional withholding of information was the accepted norm in medical practice. It was not until 1979 that a majority of physicians reported disclosing cancer diagnoses to their patients. To appreciate the current state of the physician-patient relationship, it is important to understand how physician-patient communication has developed over time and the forces that led to these changes. In this article, we trace the ethics and associated practices of truth-telling during the past two centuries, and outline the many pressures that influenced physician behavior during that time period. We conclude that the history of disclosure is not yet finished, as physicians still struggle to find the best way to share difficult information without causing undue harm to their patients.

  6. Ancient collagen reveals evolutionary history of the endemic South American 'ungulates'. (United States)

    Buckley, Michael


    Since the late eighteenth century, fossils of bizarre extinct creatures have been described from the Americas, revealing a previously unimagined chapter in the history of mammals. The most bizarre of these are the 'native' South American ungulates thought to represent a group of mammals that evolved in relative isolation on South America, but with an uncertain affinity to any particular placental lineage. Many authors have considered them descended from Laurasian 'condylarths', which also includes the probable ancestors of perissodactyls and artiodactyls, whereas others have placed them either closer to the uniquely South American xenarthrans (anteaters, armadillos and sloths) or the basal afrotherians (e.g. elephants and hyraxes). These hypotheses have been debated owing to conflicting morphological characteristics and the hitherto inability to retrieve molecular information. Of the 'native' South American mammals, only the toxodonts and litopterns persisted until the Late Pleistocene-Early Holocene. Owing to known difficulties in retrieving ancient DNA (aDNA) from specimens from warm climates, this research presents a molecular phylogeny for both Macrauchenia patachonica (Litopterna) and Toxodon platensis (Notoungulata) recovered using proteomics-based (liquid chromatography-tandem mass spectrometry) sequencing analyses of bone collagen. The results place both taxa in a clade that is monophyletic with the perissodactyls, which today are represented by horses, rhinoceroses and tapirs.

  7. Fabricating authenticity: modeling a whale at the American Museum of Natural History, 1906-1974. (United States)

    Rossi, Michael


    Historians of science have in recent years become increasingly attentive to the ways in which issues of process, matter, meaning, and value combine in the fabrication of scientific objects. This essay examines the techniques that went into the construction--and authentication--of one such scientific object: a model of a blue, or "sulfur-bottom," whale manufactured at the American Museum of Natural History in 1907. In producing their model, exhibitors at the American Museum employed a patchwork of overlapping discursive, procedural, and material techniques to argue that their fabrication was as authentic--as truthful, accurate, authoritative, and morally and aesthetically worthy of display--as an exhibit containing a real, preserved cetacean. Through an examination of the archival and published traces left by these exhibitors as they built their whale, I argue that the scientific meanings of authenticity at the American Museum were neither static nor timeless, but rather were subject to constant negotiation, examination, re-evaluation, and upkeep.

  8. Perspectives:The Strength of a People: Exploring the Impact of History and Culture on African American Families Who Are Homeless (United States)

    Temple, Tabitha; Diamond-Berry, Kimberly


    The authors share their perspective on how the history of African American's in the U.S., and an awareness of the role of African cultural traditions, can provide insight on working effectively with African American families.

  9. History of Indian Arts Education in Santa Fe: The Institute of American Indian Arts with Historical Background 1890 to 1962. (United States)

    Garmhausen, Winona

    This book traces the history of the Institute of American Indian Arts in Santa Fe, New Mexico. Sections cover four time periods in the evolution of the Institute: the United States Indian Industrial School at Sante Fe, 1890-1932; the Santa Fe Indian School, 1930-62; and the Institute of American Indian Arts, 1962-70 and 1970-78. The United States…

  10. An Empire of Wealth:The Epic History of American Economic Power

    Institute of Scientific and Technical Information of China (English)


    From the publish.Throughout time, from ancient Rome to modern Britain, the great empires built and maintained their dominion through force of arms and political power over alien peoples. In this illuminating work of history, John Steele Gordon tells the extraordinary story of how the United States, a global power without precedent, became the first country to dominate the world through the creation of wealth.The American economy is by far the world's largest,but it is also the most dynamic and innovative. The nation used its English political inheritance, as well as its diverse, ambitious population and seemingly bottomless imagination, to create an unrivaled economy capable of developing more wealth for more and more people as it grows.

  11. "One Grand Pursuit": A Brief History of the American Philosophical Society's First 250 Years. 1743-1993 by Edward C. Carter II. American Philosophical Society, Philadelphia, 1993

    Directory of Open Access Journals (Sweden)

    Richard B. Woodbury


    Full Text Available The American Philosophical Society (APS was founded in 1743 by Benjamin Franklin (then only 37 years old and is North America's oldest scholarly organization. The archaeological interests of Thomas Jefferson, who became its third president in 1797, are not mentioned in this history but it is worth noting that besides his well known pioneering excavation of a burial mound in 1784 he sent out a circular letter for the APS to secure information on archaeological remains, stating, "The American Philosophical Society have [sic] always considered the antiquity, changes, and present state of their own country as primary objects of their research".

  12. Online Teacher Education: A Formal-Informal Partnership between Brooklyn College and the American Museum of Natural History (United States)

    Miele, Eleanor; Shanley, Deborah; Steiner, Robert V.


    This article describes the evolution of a partnership between Brooklyn College (BC) of the City University of New York (CUNY) and the American Museum of Natural History (AMNH) that ultimately resulted in the formal incorporation of the museum's online Seminars on Science (SoS) courses into master's degree programs at Brooklyn College for teachers…

  13. An Analysis of the Treatment of Corporate Influence on Government by United States History and American Government High School Textbooks (United States)

    Neumann, Richard


    This article reports on an investigation to explore the possibility that ideology might be expressed in the treatment of corporate influence on federal government by social studies textbooks. Two textbooks were examined in the study--United States history and American government. Corporate influence involves activities that affect election and…

  14. Debating the Study of the Past: A Historical Analysis of American History Curriculum and Instruction between 1890 and 1920 (United States)

    Galligan, Mark N.


    This paper presents the research design, rationale, and the results of a historical document-based research project to answer the following two-part question: How do popular and dominant political, social, and economic forces affect the creation and delivery of American history curriculum in public schools between 1890 and 1920 and how is this…


    Energy Technology Data Exchange (ETDEWEB)

    Jang, Sohee; Lee, Young-Wook, E-mail: [Center for Galaxy Evolution Research and Department of Astronomy, Yonsei University, Seoul 120-749 (Korea, Republic of)


    In our recent investigation of the Oosterhoff dichotomy in the multiple population paradigm, we have suggested that the RR Lyrae variables in the globular clusters (GCs) of Oosterhoff groups I, II, and III are produced mostly by first, second, and third generation stars (G1, G2, and G3), respectively. Here we show, for the first time, that the observed dichotomies in the inner and outer halo GCs can be naturally reproduced when these models are extended to all metallicity regimes, while maintaining reasonable agreements in the horizontal-branch type versus [Fe/H] correlations. In order to achieve this, however, specific star formation histories are required for the inner and outer halos. In the inner halo GCs, the star formation commenced and ceased earlier with a relatively short formation timescale between the subpopulations (∼0.5 Gyr), while in the outer halo, the formation of G1 was delayed by ∼0.8 Gyr with a more extended timescale between G1 and G2 (∼1.4 Gyr). This is consistent with the dual origin of the Milky Way halo. Despite the difference in detail, our models show that the Oosterhoff period groups observed in both outer and inner halo GCs are all manifestations of the “population-shift” effect within the instability strip, for which the origin can be traced back to the two or three discrete episodes of star formation in GCs.

  16. Star formation history of the Milky Way halo traced by the Oosterhoff dichotomy among globular clusters

    CERN Document Server

    Jang, Sohee


    In our recent investigation of the Oosterhoff dichotomy in the multiple population paradigm (Jang et al. 2014), we have suggested that the RR Lyrae variables in the Oosterhoff groups I, II, and III globular clusters (GCs) are produced mostly by the first, second, and third generation stars (G1, G2, and G3), respectively. Here we show, for the first time, that the observed dichotomies in the inner and outer halo GCs can be naturally reproduced when these models are extended to all metallicity regimes, while maintaining reasonable agreements in the horizontal-branch type versus [Fe/H] correlations. In order to achieve this, however, specific star formation histories are required for the inner and outer halos. In the inner halo GCs, the star formation commenced and ceased earlier with relatively short formation timescale between the subpopulations (~0.5 Gyr), while in the outer halo, the formation of G1 was delayed by ~0.8 Gyr with more extended timescale between G1 and G2 (~1.4 Gyr). This is consistent with the...

  17. Cluster and cluster galaxy evolution history from IR to X-ray observations of the young cluster RX J1257.2+4738 at z=0.866

    CERN Document Server

    Ulmer, M P; Neto, G B Lima; Durret, F; Covone, G; Ilbert, O; Cypriano, E S; Allam, S S; Kron, R G; Mahoney, W A; Gavazzi, R


    The cosmic time around the z~1 redshift range appears crucial in the cluster and galaxy evolution, since it is probably the epoch of the first mature galaxy clusters. Our knowledge of the properties of the galaxy populations in these clusters is limited because only a handful of z~1 clusters are presently known. In this framework, we report the discovery of a z~0.87 cluster and study its properties at various wavelengths. We gathered X-ray and optical data (imaging and spectroscopy), and near and far infrared data (imaging) in order to confirm the cluster nature of our candidate, to determine its dynamical state, and to give insight on its galaxy population evolution. Our candidate structure appears to be a massive z~0.87 dynamically young cluster with an atypically high X-ray temperature as compared to its X-ray luminosity. It exhibits a significant percentage ~90% of galaxies that are also detected in the 24micron band. The cluster RXJ1257.2+4738 appears to be still in the process of collapsing. Its relativ...

  18. Recasting History: Are Race, Class, and Gender Dominating American History? A Study of U.S. History Courses at the University of Texas and Texas A&M University (United States)

    Fonte, Richard W.; Wood, Peter W.; Thorne, Ashley


    In 1971, the state of Texas enacted a legislative requirement that students at public institutions complete two courses in American history. With that mandate in mind, the Texas Association of Scholars and the National Association of Scholars' Center for the Study of the Curriculum proposed to determine how students today meet the requirement, and…

  19. Dietary history contributes to enterotype-like clustering and functional metagenomic content in the intestinal microbiome of wild mice. (United States)

    Wang, Jun; Linnenbrink, Miriam; Künzel, Sven; Fernandes, Ricardo; Nadeau, Marie-Josée; Rosenstiel, Philip; Baines, John F


    Understanding the origins of gut microbial community structure is critical for the identification and interpretation of potential fitness-related traits for the host. The presence of community clusters characterized by differences in the abundance of signature taxa, referred to as enterotypes, is a debated concept first reported in humans and later extended to other mammalian hosts. In this study, we provide a thorough assessment of their existence in wild house mice using a panel of evaluation criteria. We identify support for two clusters that are compositionally similar to clusters identified in humans, chimpanzees, and laboratory mice, characterized by differences in Bacteroides, Robinsoniella, and unclassified genera belonging to the family Lachnospiraceae. To further evaluate these clusters, we (i) monitored community changes associated with moving mice from the natural to a laboratory environment, (ii) performed functional metagenomic sequencing, and (iii) subjected wild-caught samples to stable isotope analysis to reconstruct dietary patterns. This process reveals differences in the proportions of genes involved in carbohydrate versus protein metabolism in the functional metagenome, as well as differences in plant- versus meat-derived food sources between clusters. In conjunction with wild-caught mice quickly changing their enterotype classification upon transfer to a standard laboratory chow diet, these results provide strong evidence that dietary history contributes to the presence of enterotype-like clustering in wild mice.

  20. The History, Role, and Value of Public Directors on Certifying Boards: The American Board of Ophthalmology Experience. (United States)

    Anderson, Suzanne T; Nora, Lois M; McEntee, Christine W; Fitzgerald, Matthew E; Nugent, Samantha Guastella


    The mission of the American Board of Ophthalmology (ABO) is to serve the public by improving the quality of ophthalmic practice through a continuing certification process that fosters excellence and encourages continual learning. Since 2001, achieving this mission has been enhanced by including public directors in the ABO governance. We review the evolution of including nonprofessional members on the governing boards of professional regulatory and self-regulatory organizations generally, provide history about the incorporation of non-professional public directors into the governance structure of the American Board of Medical Specialties and the ABO, and offer insights about the perceived impact of public directors on the ABO.

  1. Evolutionary history of four binary blue stragglers from the globular clusters \\omega Cen, M55, 47 Tuc and NGC 6752

    CERN Document Server

    Stepien, K; Rozyczka, M


    Context. Origin and evolution of blue stragglers in globular clusters is still a matter of debate. Aims. The aim of the present investigation is to reproduce the evolutionary history of four binary blue stragglers in four different clusters, for which precise values of global parameters are known. Methods. Using the model for cool close binary evolution, developed by one of us (KS), progenitors of all investigated binaries were found and their parameters evolved into the presently observed values. Results. The results show that the progenitors of the binary blue stragglers are cool close binaries with period of a few days, which transform into stragglers by rejuvenation of the initially less massive component by mass transfer from its more massive companion overflowing the inner critical Roche surface. The parameters of V209 from \\omega Cen indicate that the binary is substantially enriched in helium. This is an independent and strong evidence for the existence of the helium rich subpopulation in this cluster...

  2. A "Great Roads" Approach to Teaching Modern World History and Latin American Regional Survey Courses: A Veracruz to Mexico City Case Study. (United States)

    Brown, James Seay, Jr.; Sullivan-Gonzalez, Douglass


    Outlines an innovative way of teaching "World History Since 1500" at Samford University (Birmingham, Alabama) called the "great roads" approach, centered upon important roads in a country's history. Presents the "Veracruz to Mexico City corridor" case study used to teach a Latin American modern history course. (CMK)

  3. Historie

    DEFF Research Database (Denmark)

    Poulsen, Jens Aage

    Historie i serien handler om læreplaner og læremidler og deres brug i skolefaget historie. Bogen indeholder nyttige redskaber til at analysere og vurdere læremidler......Historie i serien handler om læreplaner og læremidler og deres brug i skolefaget historie. Bogen indeholder nyttige redskaber til at analysere og vurdere læremidler...

  4. A cluster analytic examination of acculturation and health status among Asian Americans in the Washington DC metropolitan area, United States. (United States)

    Lee, Sunmin; Chen, Lu; He, Xin; Miller, Matthew J; Juon, Hee-Soon


    Previous studies reported mixed findings on the relationship between acculturation and health status among Asian Americans due to different types of acculturation measures used or different Asian subgroups involved in various studies. We aim to fill the gap by applying multiple measures of acculturation in a diverse sample of Asian subgroups. A cross sectional study was conducted among Chinese, Korean and Vietnamese Americans in Washington D.C. Metropolitan Area to examine the association between health status and acculturation using multiple measures including the Suinn-Lew Asian Self-Identity Acculturation (SL-ASIA) scale, clusters based on responses to SL-ASIA, language preference, length of stay, age at arrival in the United Sates and self-identity. Three clusters (Asian (31%); Bicultural (47%); and American (22%)) were created by using a two-step hierarchical method and Bayesian Information Criterion values. Across all the measures, more acculturated individuals were significantly more likely to report good health than those who were less acculturated after adjusting for covariates. Specifically, those in the American cluster were 3.8 times (95% Confidence Interval (CI): 2.2, 6.6) more likely and those in the Bicultural cluster were 1.7 times more likely (95% CI: 1.1, 2.4) to report good health as compared to those in the Asian cluster. When the conventional standardized SL-ASIA summary score (range:-1.4 to 1.4) was used, a one point increase was associated with 2.2 times greater odds of reporting good health (95% CI: 1.5, 3.2). However, the interpretation may be challenging due to uncertainty surrounding the meaning of a one point increase in SL-ASIA summary score. Among all the measures used, acculturation clusters better approximated the acculturation process and provided us with a more accurate test of the association in the population. Variables included in this measure were more relevant for our study sample and may have worked together to capture the

  5. “Using History to Make Slavery History”: The African American Past and the Challenge of Contemporary Slavery

    Directory of Open Access Journals (Sweden)

    James B. Stewart


    Full Text Available This article argues that contemporary antislavery activism in the United States is programmatically undermined and ethically compromised unless it is firmly grounded in a deep understanding of the African American past. Far too frequently those who claim to be “the new abolitionists” evince no interest in what the original abolitionist movement might have to teach them and seem entirely detached from a U.S. history in which the mass, systematic enslavement of African Americans and its consequences are dominating themes. As a result contemporary antislavery activism too often marginalizes the struggle for racial justice in the United States and even indulges in racist ideology. In an effort to overcome these problems, this article seeks to demonstrate in specific detail how knowledge of the African American past can empower opposition to slavery as we encounter it today.

  6. New York City International Polar Weekend at the American Museum of Natural History (United States)

    Pfirman, S.; Turrin, M.; Macphee, R.


    The American Museum of Natural History, in partnership with Lamont-Doherty Earth Observatory and the Earth Institute of Columbia University and Barnard College, is featuring the International Polar Year through a New York City International Polar Weekend (NYC-IPW) in 2007, 2008 and 2009. The event showcases current polar research, polar environmental changes, history and culture during two days of family programs and activities, performances, and lectures. The goal of the NYC-IPW is to engage diverse audiences and enhance the public understanding of polar science, in particular IPY research, through close interactions with polar experts. Activities for the public include many disciplines, ranging from the physical sciences and cultural anthropology to music and art, and are presented in many forms, from lectures, panels and films to posters and play. Highlights of the NYC-IPW include: 1) A polar fair for youth and adults, showcasing scientists, artists, and educators who have worked at one or both poles and including many interactive exhibits featuring such topics as life in New York at the end of the last Ice Age, how Arctic sea ice is changing, and life on and under the ice. 2) Performances and presentations oriented towards children and families, including Inuit Throat Singers, Central Park Zoo Theater Group, and a northern lights show. 3) Lectures showcasing current IPY research and addressing such issues as the possible effects of climate change on the poles and the rest of the world, as well as polar poetry, art and film. 4) A partnership with New York City Urban Advantage program for Middle School students in the city to meet with scientists, teachers and students who had participated in polar research and travel. 5) Norwegian Consulate sponsorship of science presenters and Sami performers. The March 2007 event involved 85 presenters and volunteers from 22 institutions, and attracted ca. 3,500 visitors. Approximately 5,000 visitors attended the February 2008

  7. The context of collecting family health history: examining definitions of family and family communication about health among African American women. (United States)

    Thompson, Tess; Seo, Joann; Griffith, Julia; Baxter, Melanie; James, Aimee; Kaphingst, Kimberly A


    Public health initiatives encourage the public to discuss and record family health history information, which can inform prevention and screening for a variety of conditions. Most research on family health history discussion and collection, however, has predominantly involved White participants and has not considered lay definitions of family or family communication patterns about health. This qualitative study of 32 African American women-16 with a history of cancer-analyzed participants' definitions of family, family communication about health, and collection of family health history information. Family was defined by biological relatedness, social ties, interactions, and proximity. Several participants noted using different definitions of family for different purposes (e.g., biomedical vs. social). Health discussions took place between and within generations and were influenced by structural relationships (e.g., sister) and characteristics of family members (e.g., trustworthiness). Participants described managing tensions between sharing health information and protecting privacy, especially related to generational differences in sharing information, fear of familial conflict or gossip, and denial (sometimes described as refusal to "own" or "claim" a disease). Few participants reported that anyone in their family kept formal family health history records. Results suggest family health history initiatives should address family tensions and communication patterns that affect discussion and collection of family health history information.

  8. Introducing Hyperworld(s: Language, Culture, and History in the Latin American world(s

    Directory of Open Access Journals (Sweden)

    Paul Allatson


    Full Text Available This introduction to the January 2008 special edition of PORTAL engages with the processes by which, in the early 21st century—an information age of hypertechnology, post-nationalism, post-Fordism, and dominating transnational media—culture and economy have become fused, and globalizations tend towards the mercantilization, commodification, and privatization of human experience. We recognize that access to the technologies of globalizations is uneven. Although cyberspace and other hypertechnologies have become an integral part of workspaces, and of the domestic space in most households, across Western industrialized societies, and for the middle and upper-classes everywhere, this is not a reality for most people in the world, including the Latin American underclasses, the majority of the continent’s population. But we also agree with pundits who note how that limited access has not prevented a ‘techno-virtual spillover’ into the historical-material world. More and more people are increasingly touched by the techno-virtual realm and its logics, with a resultant transformation of global imaginaries in response to, for instance, the global spread of privatised entertainment and news via TV, satellites and the internet, and virtualized military operations (wars on terror, drugs, and rogue regimes. Under these hyperworldizing conditions, we asked, how might we talk about language, culture and history in Latin America, especially since language has an obvious, enduring importance as a tool for communication, and as the means to define culture and give narrative shape to our histories and power struggles? Our central term ‘hyperworld(s’ presents us with numerous conceptual and epistemological challenges, not least because, whether unintended or not, it evokes cyberspace, thus gesturing toward either the seamless integration of physical and virtual reality, or its converse, a false opposition between the material and the virtual. The term

  9. Einstein Online: A Web-based Course for K-12 Teachers from the American Museum of Natural History (United States)

    Steiner, Robert


    Einstein Online: A Web-based Course for K-12 Teachers from the American Museum of Natural History Robert V. Steiner, Ph.D. Project Director, Seminars on Science American Museum of Natural History The American Museum of Natural History, in collaboration with Hebrew University and the Skirball Cultural Center, has created a major exhibit on Albert Einstein, including extensive coverage of his contributions to relativity, quantum mechanics and unified field theories as well as the social and political dimensions of his life. Leveraging the assets of this exhibit as well as the expertise of the Museum's Department of Astrophysics and its Education Department, a six-week online professional development course for K-12 teachers has been created, providing inquires into some of the frontiers of physics through rich media resources, facilitated discussion forums and assignments. The course, which requires only minimal Web access, offers a unique opportunity for teachers across the United States to explore modern physics guided by a working scientist and a skilled online facilitator. The course includes original essays by Museum scientists, images, video, simulations, web links and digital resources for classroom use. The course design, development, implementation and evaluation are reviewed.

  10. Approaches to Climate Literacy at the American Museum of Natural History (United States)

    Steiner, R. V.


    The American Museum of Natural History (AMNH) offers a suite of courses, workshops and special events in climate change education for audiences ranging from young children to adults and utilizing both online and in-person formats. These offerings are supported by rich digital resources including video, animations and data visualizations. These efforts have the potential to raise awareness of climate change, deepen understandings and improve public discourse and decision-making on this critical issue. For adult audiences, Our Earth's Future offers participants a five-week course at AMNH that focuses on climate change science, impacts and communication, taking advantage of both AMNH expertise and exhibitry. Online versions of this course include both a ten-week course as well as three different three-week thematic courses. (The longer course is now available as a MOOC in Coursera.) These activities have been supported by a grant from IMLS. The results of independent evaluation provide insight into participant needs and how they might be addressed. For K-12 educators, the Museum's Seminars on Science program of online teacher professional development offers, in collaboration with its higher education partners, a graduate course in climate change that is authored by both an AMNH curator and leading NASA scientists. Developed with support from both NASA and NSF, the course provides a semester-equivalent introduction to climate change science for educators, including digital resources, assignments and discussions for classroom use. The results of independent evaluation will be presented. For younger audiences, the presentation will highlight resources from the AMNH Ology site; television programming conducted in partnership with HBO; Science Bulletinsvideos that include current climate change research; resources related to the GRACE mission for tracking water from space; and special event programming at the Museum on climate change. This presentation will address the

  11. American Labor in U.S. History Textbooks: How Labor's Story Is Distorted in High School History Textbooks (United States)

    Cole, Paul F.; Megivern, Lori; Hilgert, Jeff


    Imagine opening a high school U.S. history textbook and finding no mention of--or at most a passing sentence about--Valley Forge, the Missouri Compromise, or the League of Nations. Imagine not finding a word about Benjamin Franklin, Lewis and Clark, Sitting Bull, Andrew Carnegie, or Rosa Parks. Imagine if these key events and people just…

  12. Community Portraits: County Atlases as Resources for Teaching U.S. History. Cartographic Traditions in American History. (United States)

    Danzer, Gerald A., Ed.; Newman, Mark, Ed.

    This collection of cartographic projects grew out of a professional development summer institute for teachers conducted in 1995 in the History Department of the University of Illinois at Chicago. Curriculum materials developed during the institute were used in various classrooms during the following school year. The collection contains selected…

  13. A data mining approach to dinoflagellate clustering according to sterol composition: Correlations with evolutionary history. (United States)

    This study examined the sterol compositions of 102 dinoflagellates (including several previously unexamined species) using clustering techniques as a means of determining the relatedness of the organisms. In addition, dinoflagellate sterol-based relationships were compared statistically to dinoflag...

  14. Supernova enrichment and dynamical histories of solar-type stars in clusters

    CERN Document Server

    Parker, Richard J; Davies, Melvyn B; Meyer, Michael R


    We use N-body simulations of star cluster evolution to explore the hypothesis that short-lived radioactive isotopes found in meteorites, such as 26-Al, were delivered to the Sun's protoplanetary disc from a supernova at the epoch of Solar System formation. We cover a range of star cluster formation parameter space and model both clusters with primordial substructure, and those with smooth profiles. We also adopt different initial virial ratios - from cool, collapsing clusters to warm, expanding associations. In each cluster we place the same stellar population; the clusters each have 2100 stars, and contain one massive 25M_Sun star which is expected to explode as a supernova at about 6.6Myr. We determine the number of Solar (G)-type stars that are within 0.1 - 0.3pc of the 25M_Sun star at the time of the supernova, which is the distance required to enrich the protoplanetary disc with the 26-Al abundances found in meteorites. We then determine how many of these G-dwarfs are unperturbed `singletons'; stars whic...

  15. The IMF and Star Formation History of the Stellar Clusters in the Vela D Cloud

    CERN Document Server

    Massi, F; Vanzi, L; Massi, Fabrizio; Testi, Leonardo; Vanzi, Leonardo


    We present the results of a Near-Infrared deep photometric survey of a sample of six embedded star clusters in the Vela-D molecular cloud, all associated with luminous (~10^3 Lsun) IRAS sources. The clusters are unlikely to be older than a few 10^6 yrs, since all are still associated with molecular gas. We employed the fact that all clusters lie at the same distance and were observed with the same instrumental setting to derive their properties in a consistent way, being affected by the same instrumental and observational biases. We extracted the clusters' K Luminosity Functions (KLF) and developed a simple method to correct them for extinction, based on colour-magnitude diagrams. The reliability of the method has been tested by constructing synthetic clusters from theoretical tracks for pre-main sequence stars and a standard Initial Mass Function (IMF). The clusters' IMFs have been derived from the dereddened KLFs by adopting a set of pre-main sequence evolutionary tracks and assuming coeval star formation. ...

  16. The formation history of massive cluster galaxies as revealed by CARLA

    CERN Document Server

    Cooke, E A; Rettura, A; Wylezalek, D; Galametz, A; Stern, D; Brodwin, M; Muldrew, S I; Almaini, O; Conselice, C J; Eisenhardt, P R; Hartley, W G; Jarvis, M; Seymour, N; Stanford, S A


    We use a sample of 37 of the densest clusters and protoclusters across $1.3 \\le z \\le 3.2$ from the Clusters Around Radio-Loud AGN (CARLA) survey to study the formation of massive cluster galaxies. We use optical $i'$-band and infrared 3.6$\\mu$m and 4.5$\\mu$m images to statistically select sources within these protoclusters and measure their median observed colours; $\\langle i'-[3.6] \\rangle$. We find the abundance of massive galaxies within the protoclusters increases with decreasing redshift, suggesting these objects may form an evolutionary sequence, with the lower redshift clusters in the sample having similar properties to the descendants of the high redshift protoclusters. We find that the protocluster galaxies have an approximately unevolving observed-frame $i'-[3.6]$ colour across the examined redshift range. We compare the evolution of the $\\langle i'-[3.6] \\rangle$ colour of massive cluster galaxies with simplistic galaxy formation models. Taking the full cluster population into account, we show tha...

  17. Probing the Large Magellanic Cloud's recent chemical enrichment history through its star clusters

    CERN Document Server

    Palma, Tali; Geisler, Doug; Gramajo, Luciana V; Ahumada, Andrea V


    We present Washington system colour-magnitude diagrams (CMDs) for 17 practically unstudied star clusters located in the bar as well as in the inner disc and outer regions of the Large Magellanic Cloud (LMC). Cluster sizes were estimated from star counts distributed throughout the entire observed fields. Based on the best fits of theoretical isochrones to the cleaned $(C-T_1,T_1)$ CMDs, as well as on the $\\delta T_1$ parameter and the standard giant branch method, we derive ages and metallicities for the cluster sample. Four objects are found to be intermediate-age clusters (1.8-2.5 Gyr), with [Fe/H] ranging from -0.66 to -0.84. With the exception of SL263, a very young cluster ($\\sim$ 16 Myr), the remaining 12 objects are aged between 0.32 and 0.89 Gyr, with their [Fe/H] values ranging from -0.19 to -0.50. We combined our results with those for other 231 clusters studied in a similar way using the Washington system. The resulting age-metallicity relationship shows a significant dispersion in metallicities, wh...

  18. Forgotten History: Mexican American School Segregation in Arizona from 1900-1951 (United States)

    Powers, Jeanne M.


    This article documents the efforts by Mexican Americans to challenge school segregation in Arizona in the first half of the twentieth century. As in Texas and California, although state law never formally mandated the segregation of Mexican American students, school districts in Arizona often established separate "Mexican Schools" for…

  19. Encyclopedia of Native American Jewelry: A Guide to History, People, and Terms. (United States)

    Baxter, Paula A.

    A current guide to significant people, techniques, design motifs, materials, and forms, this comprehensive encyclopedia covers Native American jewelry making from the first contact with the Europeans to the present, focusing primarily on the last 150 years of Native American jewelry making. The encyclopedia contains 350 cross-referenced entries…

  20. Women in History--Dr. Susan LaFlesche Picotte: American Physician and Heroine (United States)

    Krumm, Bernita L.


    This article profiles Susan LaFlesche Picotte, the first Native American woman doctor in the United States. Several accounts record that at a very young age Picotte witnessed an incident involving a Caucasian doctor who refused to care for a dying Native American woman. Picotte was inspired by that incident to become a physician, ultimately…

  1. Critical Contexts for Biomedical Research in a Native American Community: Health Care, History, and Community Survival (United States)

    Sahota, Puneet Chawla


    Native Americans have been underrepresented in previous studies of biomedical research participants. This paper reports a qualitative interview study of Native Americans' perspectives on biomedical research. In-depth interviews were conducted with 53 members of a Southwest tribal community. Many interviewees viewed biomedical research studies as a…

  2. Halo Wide Binaries and Moving Clusters as probes of the Dynamical and Merger History of our Galaxy

    CERN Document Server

    Allen, C; Hernandez-Alcantara, A; Allen, Christine; Poveda, Arcadio


    Wide or fragile pairs are sensitive probes of the galactic potential, and they have been used to provide information about the galactic tidal field, the density of GMC and the masses of dark matter perturbers present in both the disk and the halo. Halo wide binaries and moving clusters, since they are likely to be the remains of past mergers or of dissolved clusters, can provide information on the dynamical and merger history of our Galaxy. Such remnants should continue to show similar motions over times of the order of their ages. We have looked for phase space groupings among the low-metallicity stars of Schuster et al. (2006) and have identified a number of candidate moving clusters. In several of the moving clusters we found a wide CPM binary already identified in our catalogue of wide binaries among high-velocity and metal-poor stars (Allen et al 2000a). Spectroscopic follow-up studies of these stars would confirm the physical reality of the groups, as well as allow us to distinguish whether their progen...

  3. The History and Founding Organizations of the American Board of Ophthalmology. (United States)

    Spivey, Bruce E


    In the early 1900s, ophthalmologists became the first group of American physicians to lead the call for the establishment of higher standards in the practice of medicine. This movement for excellence in practice evolved into a program of board certification through the creation of what is today the American Board of Ophthalmology (ABO). Three organizations-the American Ophthalmological Society, the Section on Ophthalmology of the American Medical Association, and the American Academy of Ophthalmology and Otolaryngology-are credited as the founders of the ABO. Representatives from these organizations were charged with overseeing the development of board certification programs from the ABO's inception in 1916 through 1982, when it became a fully autonomous organization.

  4. A history of the gamma-ray burst flux at the Earth from Galactic globular clusters

    CERN Document Server

    Domainko, W; Feng, F


    Nearby gamma-ray bursts (GRBs) are likely to have represented a significant threat to life on the Earth. Recent observations suggest that a significant source of such bursts is compact binary mergers in globular clusters. This link between globular clusters and GRBs offers the possibility to find time intervals in the past with higher probabilities of a nearby burst, by tracing globular cluster orbits back in time. Here we show that the expected flux from such bursts is not flat over the past 550 Myr but rather exhibits three broad peaks, at 70, 180 and 340 Myr ago. The main source for nearby GRBs for all three time intervals is the globular cluster 47 Tuc, a consequence of its large mass and high stellar encounter rate, as well as the fact that it is one of the globular clusters which comes quite close to the Sun. Mass extinction events indeed coincide with all three time intervals found in this study, although a chance coincidence is quite likely. Nevertheless, the identified time intervals can be used as a...

  5. Simulating galaxy Clusters -II: global star formation histories and galaxy populations

    CERN Document Server

    Romeo, A D; Sommer-Larsen, J


    Cosmological (LambdaCDM) TreeSPH simulations of the formation and evolution of galaxy groups and clusters have been performed. The simulations invoke star formation, chemical evolution with non-instantaneous recycling, metal dependent radiative cooling, strong star burst and (optionally) AGN driven galactic super winds, effects of a meta-galactic UV field and thermal conduction. The properties of the galaxy populations in two clusters, one Virgo-like (T~3 keV) and one (sub) Coma-like (T~6 keV), are discussed. The global star formation rates of the cluster galaxies are found to decrease very significantly with time from redshift z=2 to 0, in agreement with observations. The total K-band luminosity of the cluster galaxies correlates tightly with total cluster mass, and for models without additional AGN feedback, the zero point of the relation matches the observed one fairly well. The match to observed galaxy luminosity functions is reasonable, except for a deficiency of bright galaxies (M_B < -20), which bec...

  6. Johns Hopkins's first professorship in philosophy: a critical pivot point in the history of American psychology. (United States)

    Green, Christopher D


    The first professorship in philosophy at Johns Hopkins University was contested in the early 1880s by two of the most prominent and influential scholars in America: Charles Sanders Peirce and George Sylvester Morris. A third figure also vied for the position, although he was much less well known at the time: Granville Stanley Hall. Through a series of unexpected circumstances, Hall ultimately won the professorship and then used it to leverage an extraordinary career that included his opening the first American research laboratory in psychology, establishing the American Journal of Psychology, becoming president of Clark University, founding the American Psychological Association, and profoundly affecting the character of developmental psychology in America.

  7. Medical history for the masses: how American comic books celebrated heroes of medicine in the 1940s. (United States)

    Hansen, Bert


    When comic books rose to mass popularity in the early 1940s, one segment of the industry specialized in "true adventures," with stories about real people from the past and the present--in contrast to competing books that offered fantasy, science fiction, superheroes, detectives and crime, funny people, or funny animals. This study examines the figures from both medical history and twentieth-century medicine who were portrayed as heroes and role models in these comic books: first, to call attention to this very popular, if unknown, genre of medical history, and second, to illustrate how medical history was used at that time to popularize scientific and medical ideas, to celebrate the achievements of medical research, to encourage medical science as a career choice, and to show medicine as a humane and noble enterprise. The study explains how these medical history stories were situated in American popular culture more generally, and how the graphic power of comic books successfully conveyed both values and information while also telling a good story. Attention to this colorful genre of popular medical history enriches our picture of the mid-twentieth-century public's enthusiasm for medical progress.

  8. Using family history and health risk behaviors to determine predictors of depressive symptoms in Central American immigrant mothers. (United States)

    Maradiegue, Ann H; Lyon, Debra E; Meyers, Melanie F


    In this study, depressive symptomatology in Central American immigrant mothers with adolescent daughters living in the USA was explored. Using the Center for Epidemiologic Studies Depression Short Scale, the Family History Scale, an Acculturation Scale, and the core section of the Youth Conduct Disorder scale from the National Health and Nutrition Examination Survey, 101 Central American mothers were analyzed to identify predictors of depressive symptoms. Over one-third of the participants had depressive symptoms. There were no significant findings for acculturation as a predictor of depressive symptoms. Predictors that related to depressive symptomatology were a positive family history of depression, marital status (divorced), and having a daughter engaged in health risk behaviors. Clinicians working with mothers from Central America should consider risk of depression, whether there is a family history of depression; and additional stresses, such as the health risk behaviors of adolescents. Unprecedented levels of immigration around the world underscore the importance of meeting the healthcare needs of culturally-diverse groups.

  9. Genomic evidence for the Pleistocene and recent population history of Native Americans (United States)

    Eriksson, Anders; Moltke, Ida; Metspalu, Mait; Homburger, Julian R.; Wall, Jeff; Cornejo, Omar E.; Moreno-Mayar, J. Víctor; Korneliussen, Thorfinn S.; Pierre, Tracey; Rasmussen, Morten; Campos, Paula F.; de Barros Damgaard, Peter; Allentoft, Morten E.; Lindo, John; Metspalu, Ene; Rodríguez-Varela, Ricardo; Mansilla, Josefina; Henrickson, Celeste; Seguin-Orlando, Andaine; Malmström, Helena; Stafford, Thomas; Shringarpure, Suyash S.; Moreno-Estrada, Andrés; Karmin, Monika; Tambets, Kristiina; Bergström, Anders; Xue, Yali; Warmuth, Vera; Friend, Andrew D.; Singarayer, Joy; Valdes, Paul; Balloux, Francois; Leboreiro, Ilán; Vera, Jose Luis; Rangel-Villalobos, Hector; Pettener, Davide; Luiselli, Donata; Davis, Loren G.; Heyer, Evelyne; Zollikofer, Christoph P. E.; Ponce de León, Marcia S.; Smith, Colin I.; Grimes, Vaughan; Pike, Kelly-Anne; Deal, Michael; Fuller, Benjamin T.; Arriaza, Bernardo; Standen, Vivien; Luz, Maria F.; Ricaut, Francois; Guidon, Niede; Osipova, Ludmila; Voevoda, Mikhail I.; Posukh, Olga L.; Balanovsky, Oleg; Lavryashina, Maria; Bogunov, Yuri; Khusnutdinova, Elza; Gubina, Marina; Balanovska, Elena; Fedorova, Sardana; Litvinov, Sergey; Malyarchuk, Boris; Derenko, Miroslava; Mosher, M. J.; Archer, David; Cybulski, Jerome; Petzelt, Barbara; Mitchell, Joycelynn; Worl, Rosita; Norman, Paul J.; Parham, Peter; Kemp, Brian M.; Kivisild, Toomas; Tyler-Smith, Chris; Sandhu, Manjinder S.; Crawford, Michael; Villems, Richard; Smith, David Glenn; Waters, Michael R.; Goebel, Ted; Johnson, John R.; Malhi, Ripan S.; Jakobsson, Mattias; Meltzer, David J.; Manica, Andrea; Durbin, Richard; Bustamante, Carlos D.; Song, Yun S.; Nielsen, Rasmus; Willerslev, Eske


    How and when the Americas were populated remains contentious. Using ancient and modern genome-wide data, we find that the ancestors of all present-day Native Americans, including Athabascans and Amerindians, entered the Americas as a single migration wave from Siberia no earlier than 23 thousand years ago (KYA), and after no more than 8,000-year isolation period in Beringia. Following their arrival to the Americas, ancestral Native Americans diversified into two basal genetic branches around 13 KYA, one that is now dispersed across North and South America and the other is restricted to North America. Subsequent gene flow resulted in some Native Americans sharing ancestry with present-day East Asians (including Siberians) and, more distantly, Australo-Melanesians. Putative ‘Paleoamerican’ relict populations, including the historical Mexican Pericúes and South American Fuego-Patagonians, are not directly related to modern Australo-Melanesians as suggested by the Paleoamerican Model. PMID:26198033

  10. POPULATION GENETICS. Genomic evidence for the Pleistocene and recent population history of Native Americans. (United States)

    Raghavan, Maanasa; Steinrücken, Matthias; Harris, Kelley; Schiffels, Stephan; Rasmussen, Simon; DeGiorgio, Michael; Albrechtsen, Anders; Valdiosera, Cristina; Ávila-Arcos, María C; Malaspinas, Anna-Sapfo; Eriksson, Anders; Moltke, Ida; Metspalu, Mait; Homburger, Julian R; Wall, Jeff; Cornejo, Omar E; Moreno-Mayar, J Víctor; Korneliussen, Thorfinn S; Pierre, Tracey; Rasmussen, Morten; Campos, Paula F; Damgaard, Peter de Barros; Allentoft, Morten E; Lindo, John; Metspalu, Ene; Rodríguez-Varela, Ricardo; Mansilla, Josefina; Henrickson, Celeste; Seguin-Orlando, Andaine; Malmström, Helena; Stafford, Thomas; Shringarpure, Suyash S; Moreno-Estrada, Andrés; Karmin, Monika; Tambets, Kristiina; Bergström, Anders; Xue, Yali; Warmuth, Vera; Friend, Andrew D; Singarayer, Joy; Valdes, Paul; Balloux, Francois; Leboreiro, Ilán; Vera, Jose Luis; Rangel-Villalobos, Hector; Pettener, Davide; Luiselli, Donata; Davis, Loren G; Heyer, Evelyne; Zollikofer, Christoph P E; Ponce de León, Marcia S; Smith, Colin I; Grimes, Vaughan; Pike, Kelly-Anne; Deal, Michael; Fuller, Benjamin T; Arriaza, Bernardo; Standen, Vivien; Luz, Maria F; Ricaut, Francois; Guidon, Niede; Osipova, Ludmila; Voevoda, Mikhail I; Posukh, Olga L; Balanovsky, Oleg; Lavryashina, Maria; Bogunov, Yuri; Khusnutdinova, Elza; Gubina, Marina; Balanovska, Elena; Fedorova, Sardana; Litvinov, Sergey; Malyarchuk, Boris; Derenko, Miroslava; Mosher, M J; Archer, David; Cybulski, Jerome; Petzelt, Barbara; Mitchell, Joycelynn; Worl, Rosita; Norman, Paul J; Parham, Peter; Kemp, Brian M; Kivisild, Toomas; Tyler-Smith, Chris; Sandhu, Manjinder S; Crawford, Michael; Villems, Richard; Smith, David Glenn; Waters, Michael R; Goebel, Ted; Johnson, John R; Malhi, Ripan S; Jakobsson, Mattias; Meltzer, David J; Manica, Andrea; Durbin, Richard; Bustamante, Carlos D; Song, Yun S; Nielsen, Rasmus; Willerslev, Eske


    How and when the Americas were populated remains contentious. Using ancient and modern genome-wide data, we found that the ancestors of all present-day Native Americans, including Athabascans and Amerindians, entered the Americas as a single migration wave from Siberia no earlier than 23 thousand years ago (ka) and after no more than an 8000-year isolation period in Beringia. After their arrival to the Americas, ancestral Native Americans diversified into two basal genetic branches around 13 ka, one that is now dispersed across North and South America and the other restricted to North America. Subsequent gene flow resulted in some Native Americans sharing ancestry with present-day East Asians (including Siberians) and, more distantly, Australo-Melanesians. Putative "Paleoamerican" relict populations, including the historical Mexican Pericúes and South American Fuego-Patagonians, are not directly related to modern Australo-Melanesians as suggested by the Paleoamerican Model.

  11. A history of the American Board of Surgery: vignettes from the certifying examination: The Edgar J. Poth Memorial Lecture. (United States)

    Walker, John Patrick


    The American Board of Surgery was established in 1937 to certify surgeons who through training, experience, and examination meet the highest standards of surgical care. This lecture was given as the Edgar Poth lecture at the April 2015 meeting of the Southwestern Surgical Congress. Dr Poth was a surgical educator from the University of Texas Medical Branch, Galveston who was President of the Southwestern in 1963. The paper presents the history of the founding of the American Board of Surgery, with particular emphasis on the certifying examination-Part 2. Vignettes of occurrences associated with the "Oral" examination are given. The examination has changed substantially from a 2-day event involving an actual surgical procedure to the 90-minute quiz given today. The oral examinations remain an important part in the process of certification of surgeons of the highest quality.

  12. Genomic evidence for the Pleistocene and recent population history of Native Americans


    Raghavan, M.; Steinrücken, M.; Harris, K; Schiffels, S.; Rasmussen, S.; DeGiorgio, M.; Albrechtsen, A.; Valdiosera, C.; Ávila-Arcos, M.; Malaspinas, A.; Eriksson, A; Moltke, I.; Metspalu,M; Homburger, J.; Wall, J


    How and when the Americas were populated remains contentious. Using ancient and modern genome-wide data, we found that the ancestors of all present-day Native Americans, including Athabascans and Amerindians, entered the Americas as a single migration wave from Siberia no earlier than 23 thousand years ago (ka) and after no more than an 8000-year isolation period in Beringia. After their arrival to the Americas, ancestral Native Americans diversified into two basal genetic branches around 13 ...

  13. Cenozoic History of Paleo-Currents through the Central American Seaway: Insights from Deep Sea Sediments and Outcrops in Panama (United States)

    Waite, A. J.; Martin, E. E.


    Paleontologic, oceanographic, and ecologic studies suggest gradual shoaling of the Central American Seaway between ~15 to 2 Ma that caused a stepwise shutdown of deep, intermediate, and shallow water exchange between the Pacific Ocean and Caribbean Sea. This diminishing communication has been further associated with changes in surface and deep ocean currents, atmospheric flow, and ultimately regional and global climate. Recent studies of the Isthmus of Panama's exhumation history, palm phylogenies, and fossil/molecularly derived migration rates, however, suggest that the isthmus may have risen much earlier. An earlier rise scenario would call into question many accepted consequences of this gateway event under the 'Panama Hypothesis,' including strengthened thermohaline circulation, North Atlantic Deep Water production, the onset of Northern Hemisphere glaciation, and the Great American Biotic Interchange. Despite considerable research on the Neogene, few paleoceanographic studies have directly examined long-term changes in the adjacent oceans over the Cenozoic to evaluate the potential for earlier events in the closure history of the seaway. In this study, we extend records of bottom water circulation reconstructed from the Nd-isotopes of fish teeth from several Caribbean International Ocean Discovery Program sediment cores (ODP Sites 998, 999, 1000). These reconstructions clearly depict an increase in Pacific volcanism throughout the Cenozoic and sustained transport of Pacific waters into the Caribbean basin from ~50 to 9 Ma, although there appear to be interesting complexities within the Caribbean basin itself. We also present preliminary investigations into the potential of Nd-isotopic analyses on fossil fish teeth recovered from outcrops and exposures of marine strata across Panama to further elucidate the regional dynamics and shoaling history of the Central American Seaway.

  14. Diamond in the Rough: Baseball and the Study of American Sports History. (United States)

    Zingg, Paul J.


    Using baseball as its focus, this article demonstrates the importance of sport in helping students understand certain central themes of United States history. Provides a brief history of baseball and reviews scholarly works on its influence in United States culture. (JDH)

  15. "Sisters Are Doin' It for Themselves" The Feminization of American History Through Popular Culture as Method. (United States)

    Chilcoat, George W.

    In considering the historical contributions of women in a high school history course, a series of projects were developed that were activity oriented, created student involvement in historial research, and organized to feature the roles women have played in the development of the United States. Classroom procedures are introduced based on early…

  16. A brief foreword to « Wars and New Beginnings in American History: An American National Rhetoric from the Early Republic to the Obama Presidency »

    Directory of Open Access Journals (Sweden)

    Jenel Virden


    Full Text Available War has been a defining moment in the history of nations and no more so than in the United States.  It gives the editors of EJAS great pleasure to present this excellent volume of essays focussed on the issue of American national rhetoric and American wars.  This volume is comprised of essays that were presented at a workshop on “Wars and New Beginnings in American History”, which took place in Dublin in 2010 at the biennial conference of the European Association for American Studies, or are ...

  17. American Dream in Early American Literatuer

    Institute of Scientific and Technical Information of China (English)

    屈彩娥; 李小玺


    American dream has often been closely rehted to American literature.Many say that the American literary history can be seen as the history of American dreams.In most periods in history,writers,whose dreams have been infused in a variety of characters create the American literature.While in Early American literature,American dream had been presented in a dif-ferent way.

  18. Genomic evidence for the Pleistocene and recent population history of Native Americans

    KAUST Repository

    Raghavan, Maanasa


    How and when the Americas were populated remains contentious. Using ancient and modern genome-wide data, we found that the ancestors of all present-day Native Americans, including Athabascans and Amerindians, entered the Americas as a single migration wave from Siberia no earlier than 23 thousand years ago (ka) and after no more than an 8000-year isolation period in Beringia. After their arrival to the Americas, ancestral Native Americans diversified into two basal genetic branches around 13 ka, one that is now dispersed across North and South America and the other restricted to North America. Subsequent gene flow resulted in some Native Americans sharing ancestry with present-day East Asians (including Siberians) and, more distantly, Australo-Melanesians. Putative "Paleoamerican" relict populations, including the historical Mexican Pericúes and South American Fuego-Patagonians, are not directly related to modern Australo-Melanesians as suggested by the Paleoamerican Model. © 2015, American Association for the Advancement of Science. All rights reserved.

  19. The special growth history of central galaxies in groups and clusters (United States)

    Nipoti, Carlo


    Central galaxies (CGs) in galaxy groups and clusters are believed to form and assemble a good portion of their stellar mass at early times, but they also accrete significant mass at late times via galactic cannibalism, that is merging with companion group or cluster galaxies that experience dynamical friction against the common host dark-matter halo. The effect of these mergers on the structure and kinematics of the CG depends not only on the properties of the accreted satellites, but also on the orbital parameters of the encounters. Here we present the results of numerical simulations aimed at estimating the distribution of merging orbital parameters of satellites cannibalized by the CGs in groups and clusters. As a consequence of dynamical friction, the satellites' orbits evolve losing energy and angular momentum, with no clear trend towards orbit circularization. The distributions of the orbital parameters of the central-satellite encounters are markedly different from the distributions found for halo-halo mergers in cosmological simulations. The orbits of satellites accreted by the CGs are on average less bound and less eccentric than those of cosmological halo-halo encounters. We provide fits to the distributions of the central-satellite merging orbital parameters that can be used to study the merger-driven evolution of the scaling relations of CGs.

  20. Solving cryptogenic histories using host and parasite molecular genetics: the resolution of Littorina littorea's North American origin. (United States)

    Blakeslee, April M H; Byers, James E; Lesser, Michael P


    Even after decades of investigation using multiple sources of evidence, the natural histories of some species remain unclear (i.e. cryptogenic). A key example is Littorina littorea, the most abundant intertidal snail in northeastern North America. Native to Europe, the snail's ecological history in North America has been debated for over 100 years with no definitive resolution. To resolve its cryptogenic status, we used molecular genetics from a novel combination of the snail and a highly associated trematode parasite, Cryptocotyle lingua. Based on mitochondrial sequences of 370 L. littorea and 196 C. lingua individuals, our results demonstrate a significant reduction in genetic diversity in North America vs. Europe, North American haplotypes nested within European haplotypes, and mean divergence estimates of approxiamtely 500 years ago from Europe for both host and parasite--thus supporting a recent introduction of both host and parasite to North America from Europe. Our study therefore resolves not only a specific cryptogenic history, but it also demonstrates the success of our approach generally and could be used in resolving difficult invasion histories worldwide.

  1. Possessing History and American Innocence: James Baldwin, William F. Buckley, Jr., and the 1965 Cambridge Debate

    Directory of Open Access Journals (Sweden)

    Daniel Robert McClure


    Full Text Available The 1965 debate at Cambridge University between James Baldwin and William F. Buckley, Jr., posed the question: “Has the American Dream been achieved at the Expense of the American Negro?” Within the contours of the debate, Baldwin and Buckley wrestled with the ghosts of settler colonialism and slavery in a nation founded on freedom and equality. Framing the debate within the longue durée, this essay examines the deep cultural currents related to the American racial paradox at the height of the Civil Rights movement. Underscoring the changing language of white resistance against black civil rights, the essay argues that the Baldwin and Buckley debate anticipated the ways the U.S. would address racial inequality in the aftermath of the civil rights era and the dawn of neoliberalism in the 1970s.

  2. Spatially Resolved Spectroscopy and Chemical History of Star-forming Galaxies in the Hercules Cluster: The Effects of the Environment (United States)

    Petropoulou, V.; Vílchez, J.; Iglesias-Páramo, J.; Papaderos, P.; Magrini, L.; Cedrés, B.; Reverte, D.


    Spatially resolved spectroscopy has been obtained for a sample of 27 star-forming (SF) galaxies selected from our deep Hα survey of the Hercules cluster. We have applied spectral synthesis models to all emission-line spectra of this sample using the population synthesis code STARLIGHT and have obtained fundamental parameters of stellar components such as mean metallicity and age. The emission-line spectra were corrected for underlying stellar absorption using these spectral synthesis models. Line fluxes were measured and O/H and N/O gas chemical abundances were obtained using the latest empirical calibrations. We have derived the masses and total luminosities of the galaxies using available Sloan Digital Sky Survey broadband photometry. The effects of cluster environment on the chemical evolution of galaxies and on their mass-metallicity (MZ) and luminosity-metallicity (LZ) relations were studied by combining the derived gas metallicities, the mean stellar metallicities and ages, the masses and luminosities of the galaxies, and their existing H I data. Our Hercules SF galaxies are divided into three main subgroups: (1) chemically evolved spirals with truncated ionized-gas disks and nearly flat oxygen gradients, demonstrating the effect of ram-pressure stripping; (2) chemically evolved dwarfs/irregulars populating the highest local densities, possible products of tidal interactions in preprocessing events; and (3) less metallic dwarf galaxies that appear to be "newcomers" to the cluster and are experiencing pressure-triggered star formation. Most Hercules SF galaxies follow well-defined MZ and LZ sequences (for both O/H and N/O), though the dwarf/irregular galaxies located at the densest regions appear to be outliers to these global relations, suggesting a physical reason for the dispersion in these fundamental relations. The Hercules cluster appears to be currently assembling via the merger of smaller substructures, providing an ideal laboratory where the local

  3. The role of fecundity and reproductive effort in defining life-history strategies of North American freshwater mussels. (United States)

    Haag, Wendell R


    Selection is expected to optimize reproductive investment resulting in characteristic trade-offs among traits such as brood size, offspring size, somatic maintenance, and lifespan; relative patterns of energy allocation to these functions are important in defining life-history strategies. Freshwater mussels are a diverse and imperiled component of aquatic ecosystems, but little is known about their life-history strategies, particularly patterns of fecundity and reproductive effort. Because mussels have an unusual life cycle in which larvae (glochidia) are obligate parasites on fishes, differences in host relationships are expected to influence patterns of reproductive output among species. I investigated fecundity and reproductive effort (RE) and their relationships to other life-history traits for a taxonomically broad cross section of North American mussel diversity. Annual fecundity of North American mussel species spans nearly four orders of magnitude, ranging from 200000). Estimates of RE also were highly variable, ranging among species from 0.06 to 25.4%. Median fecundity and RE differed among phylogenetic groups, but patterns for these two traits differed in several ways. For example, the tribe Anodontini had relatively low median fecundity but had the highest RE of any group. Within and among species, body size was a strong predictor of fecundity and explained a high percentage of variation in fecundity among species. Fecundity showed little relationship to other life-history traits including glochidial size, lifespan, brooding strategies, or host strategies. The only apparent trade-off evident among these traits was the extraordinarily high fecundity of Leptodea, Margaritifera, and Truncilla, which may come at a cost of greatly reduced glochidial size; there was no relationship between fecundity and glochidial size for the remaining 61 species in the dataset. In contrast to fecundity, RE showed evidence of a strong trade-off with lifespan, which was

  4. Genomic evidence for the Pleistocene and recent population history of Native Americans

    DEFF Research Database (Denmark)

    Raghavan, Maanasa; Steinruecken, Matthias; Harris, Kelley


    Howand when the Americas were populated remains contentious. Using ancient and modern genome-wide data, we found that the ancestors of all present-day Native Americans, including Athabascans and Amerindians, entered the Americas as a single migration wave from Siberia no earlier than 23 thousand ...

  5. The American Academy of Social Work and Social Welfare: History and Grand Challenges (United States)

    Barth, Richard P.; Gilmore, Grover C.; Flynn, Marilyn S.; Fraser, Mark W.; Brekke, John S.


    Conceptualized by social work deans and actualized with the support of major social work organizations, the American Academy of Social Work and Social Welfare was established in 2009. This article describes the historical context and creation of the Academy, whose objectives include recognizing outstanding social work scholars and practitioners;…

  6. History Matters: Children's Art Education inside the Japanese American Internment Camp (United States)

    Wenger, Gina Mumma


    What did art education look like within the confines of the Japanese American Internment Camp classrooms? Did the art education in the camps reflect the same curriculum that was being taught outside the camps and what other factors may have played a part in the students' experience? I propose that there were at least three significant…

  7. Teaching about the Influence of the Scientific Revolution and the Enlightenment on Early American History. (United States)

    Mills, Randy K.; Woods, John C.


    Utilizes selections from 17th century philosophical writing as instructional material for a series of learning activities that reveal the influence of the material on early American democratic thought. Activities involve selections from Isaac Newton, John Locke, Montesquieu, Rousseau, The Declaration of Independence, and Bishop Bossuet. (MJP)

  8. A History of the Division of Inorganic Chemistry, American Chemical Society. (United States)

    Bailar, John C., Jr.


    Describes the development of the Division of Inorganic Chemistry, from the founding of the American Chemical Society in 1876, the formation of the Division in 1957, and recent events. Includes tables listing officers of the Division and symposia titles at national meetings. (YP)

  9. The IMACS Cluster Building Survey: IV. The Log-normal Star Formation History of Galaxies

    CERN Document Server

    Gladders, Michael D; Dressler, Alan; Poggianti, Bianca; Vulcani, Benedetta; Abramson, Louis


    We present here a simple model for the star formation history of galaxies that is successful in describing both the star formation rate density over cosmic time, as well as the distribution of specific star formation rates of galaxies at the current epoch, and the evolution of this quantity in galaxy populations to a redshift of z=1. We show first that the cosmic star formation rate density is remarkably well described by a simple log-normal in time. We next postulate that this functional form for the ensemble is also a reasonable description for the star formation histories of individual galaxies. Using the measured specific star formation rates for galaxies at z~0 from Paper III in this series, we then construct a realisation of a universe populated by such galaxies in which the parameters of the log-normal star formation history of each galaxy are adjusted to match the specific star formation rates at z~0 as well as fitting, in ensemble, the cosmic star formation rate density from z=0 to z=8. This model pr...

  10. The Chişinău Diocesan Bulletin as a Source of History of North American Rus’

    Directory of Open Access Journals (Sweden)

    Sergey G. Sulyak


    Full Text Available The article presents an analysis of materials on the history of North American Rus’, published in the Chişinău Diocesan Bulletin in 1914. The information concerns Platon (Rozhdestvensky, Archbishop of Chişinău and Khotin in 1914–1915. Prior to that he ran the Aleutian and North American Diocese where the Russian Orthodox Church exercised canonical power over Orthodox Christians of different ethnic groups. The pages of the Chişinău Diocese official mouthpiece contained a lot of interesting information on the history of Orthodoxy in America. Much attention was given to Rusins who had emigrated to the United States and Canada from the Austro-Hungarian Empire. Archbishop Platon described affectionately the Russian inhabitants of Galician Rus’ who were the majority of his congregation. The Archbishop considered it his high-priority task to help Uniats return into the fold of the Orthodox Church. Numerous missionary conferences, towns’ meetings and other outreach conducted by the Russian Mission throughout the North American territory facilitated mass conversion of Russian Galicians (Rusins to Orthodoxy. The adoption of the New Church Statute helped organize parish life. The Russian Immigrant newspaper (1912 and The Orthodox Devotee (1913 founded by the Archbishop, played an important part in the strenghening of Orthodoxy. Established with the support of the Archbishop, the Russian Emigree Society and the Russian Emigrees’ House (1908 were able to render assistance to more than 100 000 ethnic Russian emigrees from Russia and Rusins from Galicia, Bukovina and Subcarpathian Rus’. The Archbishop’s efforts led to an increase in Orthodox parishes, thus strengthening the position of the Russian Orthodox Church in North Americ

  11. American Religion

    Institute of Scientific and Technical Information of China (English)



    It is said that American religion,as a great part of American culture,plays an important role in American culture. It is hoped that some ideas can be obtained from this research paper,which focuses on analyzing the great impact is produced to American culture by American religion. Finally, this essay gives two useful standpoints to English learners:Understunding American religion will help understand the American history, culture and American people,and help you to communic.ate with them better. Understanding American religion will help you understand English better.

  12. An early manuscript in the history of American comparative psychology: Lewis Henry Morgan's "Animal Psychology" (1857). (United States)

    Johnston, Timothy D


    Lewis Henry Morgan (1818-1881) is best known as the 1st ethnographer of Native American culture, but he also wrote on animal psychology, beginning in 1843, some 50 years before the founding of comparative psychology as a scientific discipline. Although not an evolutionist, Morgan argued that animals possess many human mental abilities, such as reason and moral judgment, and he rejected the scientific utility of the concept of instinct, a view that did not gain much currency in psychology until the rise of behaviorism in the 1920s. This 1857 manuscript, which is in the Lewis Henry Morgan Papers at the University of Rochester in Rochester, New York, formed the basis for the last chapter of his 1868 monograph on the American beaver but gives additional information on his sources and an expanded criticism of the concept of instinct.

  13. Species Profiles: Life Histories and Environmental Requirements of Coastal Fishes and Invertebrates (South Atlantic): American Eel, (United States)


    economic importance, if applicable. A three-ring binder is used for this series so that new profiles can be added as they are prepared . This project is...bands of small, pectinate or setiform teeth. A long The American eel is an important tooth patch also occurs on the vomer. prey species of larger marine...Fahay 1978). et al. (1978) collected glass eels Prior to completion of the differenti- from the Cooper River, South Carolina, ation process , some

  14. The History of Stratigraphic Excavation In Latin American Archaeology: A New Look

    Directory of Open Access Journals (Sweden)

    Daniel Schavelzon


    Full Text Available Allow me to do some history of archaeology. In 1984 and jointly with Jaime Litvak King we organized a congress that gathered at the UNAM. Mexico, with the purpose of paying homage to Ignacio Bemal called "The History of Archaeology in Mexico". On that occasion my paper raised heated controversies, as it revised the origins of stratigraphy in Mexico, a country in which the image of Manuel Gamio was highly respected and admired, while William Holmes, in those days, happened to be a perfect nobody.

  15. Overlapping clusters of gray matter deficits in paranoid schizophrenia and psychotic bipolar mania with family history. (United States)

    Cui, Liqian; Li, Mingli; Deng, Wei; Guo, Wanjun; Ma, Xiaohong; Huang, Chaohua; Jiang, Lijun; Wang, Yingcheng; Collier, David A; Gong, Qiyong; Li, Tao


    The purpose of this study was to assess volumetric abnormalities of gray matter throughout the entire brain in patients with paranoid schizophrenia or with bipolar mania compared with control groups. We obtained weighted 3D T1 magnetic resonance images from 23 patients with paranoid schizophrenia, 24 patients with psychotic bipolar mania, and 36 healthy controls. Gray matter volume differences were assessed using optimized volumetric voxel-based morphometry (VBM). Both paranoid schizophrenia and bipolar mania group showed reduction of gray matter volume in the superior temporal gyrus (STG) (Brodmann Area, BA 22 areas), and the inferior parietal lobule, and enlargement of putamen, although different sides of the inferior parietal lobule and putamen were affected in the groups. Our findings showed the presence of overlapping clusters of gray matter deficits in paranoid-type schizophrenia and psychotic bipolar mania. The overlap in gray matter pathology between the two disorders may be attributed to risk factors common to both disorders.

  16. „Lenin’s Ghost!” History of Soviet Comics Characters in American Pop Culture

    Directory of Open Access Journals (Sweden)

    Przemysław Dudziński


    Full Text Available The tension between Soviet Union and United States thatdefined the global political landscape of the second half of the twentiethcentury, had its clear impact on perceptions and creation of Soviet heroes in the context of American culture. The first and primary goal of our article is to investigate and describe the functioning of a particular theme – Russian characters, especially Russian meta-humans in the area of American popular culture, especially mainstream comics. This inquiry is intended to demonstrate the basic historical dimension, i.e. the periods of growth and decline in popularity, and even the complete disappearance of that theme. The purpose of the second goal is an attempt to analyze the structures of comics characters associated with the Soviet Union and place them in a broader historical and cultural context. These treatments allow to signal changes in time-sensitive structure, which consists of values, stereotypes and pop culture clichés appropriate for the American culture. Thus, we hope that this article will be an important contribution to the further study of these issues.

  17. And Santayana Lives On: Students' Views on the Purposes for Studying American History. (United States)

    VanSledright, Bruce A.


    Reviews and analyzes the responses of a small number of fifth graders, eighth graders, and high schoolers to detailed interviews concerning the purpose or efficacy of studying history. Reveals a sizable range of rationales characterized by age, interest, and ethnic background. Considers possible implications for teaching and curriculum…

  18. Brave New World or Blind Alley? American History on the World Wide Web. (United States)

    O'Malley, Michael; Rosenzweig, Roy


    Offers a preliminary assessment of the possibilities and limitations, allures, and dangers, of the World Wide Web for those interested in presenting, teaching, and learning United States history. Reviews Internet search tools, online libraries and archives, and museums and commercial sites. Discusses how to create an online archive. (DSK)

  19. The Images of Our Time: Using Iconic Photographs in Developing a Modern American History Course (United States)

    Lindquist, David H.


    History courses based on chronological narratives in textbooks often assume a linear format through which students accumulate substantial amounts of surface-level information, with the various pieces of that information being disconnected from each other and from larger historical contexts. In addition, such narratives are often dry and lifeless,…

  20. Using Fiction to Teach American History in Middle School: Affects on Student Engagement (United States)

    Elias, Anjuli Rose


    This research highlights the effects of using literature and relevant curriculum to teach history in grade levels 6 through 8, and analyzes how students respond when learning complicated themes and events through the medium of historic fiction. Specifically, my research seeks to inform secondary educators concerning the use of the narrative and…

  1. History of Science as Interdisciplinary Education in American Colleges: Its Origins, Advantages, and Pitfalls (United States)

    Viterbo, Paula


    Before 1950, history of science did not exist as an independent academic branch, but was instead pursued by practitioners across various humanities and scientific disciplines. After professionalization, traces of its prehistory as a cross-disciplinary area of interest bound to an interdisciplinary, educational philosophy have remained. This essay…

  2. The Struggle to Teach the Whole Story: Calvin Coolidge and American History Education. (United States)

    Stern, Sheldon M.


    Observes that up-to-date history textbooks present a view of Calvin Coolidge that is nearly indistinguishable from those of decades ago; despite strong contradictory evidence, Coolidge is portrayed as extremely reactionary and unenergetic. Argues that he was actually progressive and dedicated to his work until the death of his son in 1924. (DSK)

  3. Getting Medieval on American History Research: A Method to Help Students Think Historically (United States)

    Burkholder, Peter


    In an attempt to increase college history majors' ability to analyze primary sources, the author set up a unique research project designed to tap into his students' personal interests, and which would utilize a specific method requiring them to grapple with primary source materials in an unfamiliar, though hopefully more profitable fashion. The…

  4. American Pathfinders: Using Ray Bradbury's "Martian Chronicles" To Teach Frontier History. (United States)

    Schmalholz, Deborah Wielgot


    Presents an interdisciplinary thematic unit designed for eleventh graders that uses selected chapters of "The Martian Chronicles" to teach frontier history. Maintains that Bradbury's novel enriches students' understanding of the frontier because it compares the interactions between Native inhabitants of Mars and Earthlings to the…

  5. The improbable but unexceptional occurrence of megadrought clustering in the American West during the Medieval Climate Anomaly (United States)

    Coats, Sloan; Smerdon, Jason E.; Karnauskas, Kristopher B.; Seager, Richard


    The five most severe and persistent droughts in the American West (AW) during the Common Era occurred during a 450 year period known as the Medieval Climate Anomaly (MCA—850-1299 C.E.). Herein we use timeseries modeling to estimate the probability of such a period of hydroclimate change occurring. Clustering of severe and persistent drought during an MCA-length period occurs in approximately 10% of surrogate timeseries that were constructed to have the same characteristics as a tree-ring derived estimate of AW hydroclimate variability between 850 and 2005 C.E. Periods of hydroclimate change like the MCA are thus expected to occur in the AW, although not frequently, with a recurrence interval of approximately 11 000 years. Importantly, a shift in mean hydroclimate conditions during the MCA is found to be necessary for drought to reach the severity and persistence of the actual MCA megadroughts. This result has consequences for our understanding of the atmosphere-ocean dynamics underlying the MCA and a persistently warm Atlantic Multidecadal Oscillation is suggested to have played an important role in causing megadrought clustering during this period.

  6. Contrasting demographic history and gene flow patterns of two mangrove species on either side of the Central American Isthmus. (United States)

    Cerón-Souza, Ivania; Gonzalez, Elena G; Schwarzbach, Andrea E; Salas-Leiva, Dayana E; Rivera-Ocasio, Elsie; Toro-Perea, Nelson; Bermingham, Eldredge; McMillan, W Owen


    Comparative phylogeography offers a unique opportunity to understand the interplay between past environmental events and life-history traits on diversification of unrelated but co-distributed species. Here, we examined the effects of the quaternary climate fluctuations and palaeomarine currents and present-day marine currents on the extant patterns of genetic diversity in the two most conspicuous mangrove species of the Neotropics. The black (Avicennia germinans, Avicenniaceae) and the red (Rhizophora mangle, Rhizophoraceae) mangroves have similar geographic ranges but are very distantly related and show striking differences on their life-history traits. We sampled 18 Atlantic and 26 Pacific locations for A. germinans (N = 292) and R. mangle (N = 422). We performed coalescence simulations using microsatellite diversity to test for evidence of population change associated with quaternary climate fluctuations. In addition, we examined whether patterns of genetic variation were consistent with the directions of major marine (historical and present day) currents in the region. Our demographic analysis was grounded within a phylogeographic framework provided by the sequence analysis of two chloroplasts and one flanking microsatellite region in a subsample of individuals. The two mangrove species shared similar biogeographic histories including: (1) strong genetic breaks between Atlantic and Pacific ocean basins associated with the final closure of the Central American Isthmus (CAI), (2) evidence for simultaneous population declines between the mid-Pleistocene and early Holocene, (3) asymmetric historical migration with higher gene flow from the Atlantic to the Pacific oceans following the direction of the palaeomarine current, and (4) contemporary gene flow between West Africa and South America following the major Atlantic Ocean currents. Despite the remarkable differences in life-history traits of mangrove species, which should have had a strong influence on seed

  7. Ancient proteins resolve the evolutionary history of Darwin's South American ungulates. (United States)

    Welker, Frido; Collins, Matthew J; Thomas, Jessica A; Wadsley, Marc; Brace, Selina; Cappellini, Enrico; Turvey, Samuel T; Reguero, Marcelo; Gelfo, Javier N; Kramarz, Alejandro; Burger, Joachim; Thomas-Oates, Jane; Ashford, David A; Ashton, Peter D; Rowsell, Keri; Porter, Duncan M; Kessler, Benedikt; Fischer, Roman; Baessmann, Carsten; Kaspar, Stephanie; Olsen, Jesper V; Kiley, Patrick; Elliott, James A; Kelstrup, Christian D; Mullin, Victoria; Hofreiter, Michael; Willerslev, Eske; Hublin, Jean-Jacques; Orlando, Ludovic; Barnes, Ian; MacPhee, Ross D E


    No large group of recently extinct placental mammals remains as evolutionarily cryptic as the approximately 280 genera grouped as 'South American native ungulates'. To Charles Darwin, who first collected their remains, they included perhaps the 'strangest animal[s] ever discovered'. Today, much like 180 years ago, it is no clearer whether they had one origin or several, arose before or after the Cretaceous/Palaeogene transition 66.2 million years ago, or are more likely to belong with the elephants and sirenians of superorder Afrotheria than with the euungulates (cattle, horses, and allies) of superorder Laurasiatheria. Morphology-based analyses have proved unconvincing because convergences are pervasive among unrelated ungulate-like placentals. Approaches using ancient DNA have also been unsuccessful, probably because of rapid DNA degradation in semitropical and temperate deposits. Here we apply proteomic analysis to screen bone samples of the Late Quaternary South American native ungulate taxa Toxodon (Notoungulata) and Macrauchenia (Litopterna) for phylogenetically informative protein sequences. For each ungulate, we obtain approximately 90% direct sequence coverage of type I collagen α1- and α2-chains, representing approximately 900 of 1,140 amino-acid residues for each subunit. A phylogeny is estimated from an alignment of these fossil sequences with collagen (I) gene transcripts from available mammalian genomes or mass spectrometrically derived sequence data obtained for this study. The resulting consensus tree agrees well with recent higher-level mammalian phylogenies. Toxodon and Macrauchenia form a monophyletic group whose sister taxon is not Afrotheria or any of its constituent clades as recently claimed, but instead crown Perissodactyla (horses, tapirs, and rhinoceroses). These results are consistent with the origin of at least some South American native ungulates from 'condylarths', a paraphyletic assembly of archaic placentals. With ongoing

  8. New Constraints on the Star Formation History of the Star Cluster NGC 1856

    CERN Document Server

    Correnti, Matteo; Puzia, Thomas H; de Mink, Selma E


    We use the Wide Field Camera 3 onboard the Hubble Space Telescope to obtain deep, high-resolution photometry of the young (age ~ 300 Myr) star cluster NGC1856 in the Large Magellanic Cloud. We compare the observed colour-magnitude diagram (CMD), after having applied a correction for differential reddening, with Monte Carlo simulations of simple stellar populations (SSPs) of various ages. We find that the main sequence turn-off (MSTO) region is wider than that derived from the simulation of a single SSP. Using constraints based on the distribution of stars in the MSTO region and the red clump, we find that the CMD is best reproduced using a combination of two different SSPs with ages separated by 80 Myr (0.30 and 0.38 Gyr, respectively). However, we can not formally exclude that the width of the MSTO could be due to a range of stellar rotation velocities if the efficiency of rotational mixing is higher than typically assumed. Using a King-model fit to the surface number density profile in conjunction with dyna...

  9. Early history of electroencephalography and establishment of the American Clinical Neurophysiology Society. (United States)

    Stone, James L; Hughes, John R


    The field of electroencephalography (EEG) had its origin with the discovery of recordable electrical potentials from activated nerves and muscles of animals and in the last quarter of the 19th century from the cerebral cortex of animals. By the 1920s, Hans Berger, a neuropsychiatrist from Germany, recorded potentials from the scalp of patients with skull defects and, a few years later, with more sensitive equipment from intact subjects. Concurrently, the introduction of electronic vacuum tube amplification and the cathode ray oscilloscope was made by American physiologists or "axonologists," interested in peripheral nerve recordings. Berger's findings were independently confirmed in early 1934 by Lord Adrian in England and by Hallowell Davis at Harvard, in the United States. In the United States, the earliest contributions to human EEG were made by Hallowell Davis, Herbert H. Jasper, Frederic A. Gibbs, William Lennox, and Alfred L. Loomis. Remarkable progress in the development of EEG as a useful clinical tool followed the 1935 report by the Harvard group on the electrographic and clinical correlations in patients with absence (petit mal) seizures and altered states of consciousness. Technical aspects of the EEG and additional clinical EEG correlations were elucidated by the above investigators and a number of others. Further study led to gatherings of the EEG pioneers at Loomis' laboratory in New York (1935-1939), Regional EEG society formation, and the American Clinical Neurophysiology Society in 1946.

  10. Pubertal timing and sexual risk behaviors among rural African American male youth: testing a model based on life history theory. (United States)

    Kogan, Steven M; Cho, Junhan; Simons, Leslie Gordon; Allen, Kimberly A; Beach, Steven R H; Simons, Ronald L; Gibbons, Frederick X


    Life History Theory (LHT), a branch of evolutionary biology, describes how organisms maximize their reproductive success in response to environmental conditions. This theory suggests that challenging environmental conditions will lead to early pubertal maturation, which in turn predicts heightened risky sexual behavior. Although largely confirmed among female adolescents, results with male youth are inconsistent. We tested a set of predictions based on LHT with a sample of 375 African American male youth assessed three times from age 11 to age 16. Harsh, unpredictable community environments and harsh, inconsistent, or unregulated parenting at age 11 were hypothesized to predict pubertal maturation at age 13; pubertal maturation was hypothesized to forecast risky sexual behavior, including early onset of intercourse, substance use during sexual activity, and lifetime numbers of sexual partners. Results were consistent with our hypotheses. Among African American male youth, community environments were a modest but significant predictor of pubertal timing. Among those youth with high negative emotionality, both parenting and community factors predicted pubertal timing. Pubertal timing at age 13 forecast risky sexual behavior at age 16. Results of analyses conducted to determine whether environmental effects on sexual risk behavior were mediated by pubertal timing were not significant. This suggests that, although evolutionary mechanisms may affect pubertal development via contextual influences for sensitive youth, the factors that predict sexual risk behavior depend less on pubertal maturation than LHT suggests.

  11. Association of American Veterinary Medical Colleges (AAVMC): 50 Years of History and Service. (United States)

    Maccabe, Andrew T; Crawford, Lester; Heider, Lawrence E; Hooper, Billy; Mann, Curt J; Pappaioanou, Marguerite


    The mission of the Association of American Veterinary Medical Colleges (AAVMC) is to advance the quality of academic veterinary medicine. Founded in 1966 by the 18 US colleges of veterinary medicine and 3 Canadian colleges of veterinary medicine then in existence, the AAVMC is celebrating 50 years of public service. Initially, the AAVMC comprised the Council of Deans, the Council of Educators, and the Council of Chairs. In 1984, the tri-cameral structure was abandoned and a new governing structure with a board of directors was created. In 1997, the AAVMC was incorporated in Washington, DC and a common application service was created. Matters such as workforce issues and the cost of veterinary medical education have persisted for decades. The AAVMC is a champion of diversity in the veterinary profession and a strong advocate for One Health. The AAVMC has adopted a global perspective as more international colleges of veterinary medicine have earned COE accreditation and become members.

  12. The Land of Prehistory: A Critical History of American Archaeology. Alice Beck Kehoe. Routledge. New York

    Directory of Open Access Journals (Sweden)

    David L. Browman


    Full Text Available This book is a very difficult work to read dispassionately, for a variety of reasons, such as difficulties the reader may have with a rather convoluted discussion of Daniel Wilson and the Scottish enlightenment, the categorization of many practicing archaeologists as "petrified puddle ducks", after a term borrowed from Waiter Taylor. and taking a leaf from Taylor, utilization of the term "critical" primarily as "criticism", so that almost no current significant practicing archaeologist in North America comes out unscathed. The term puddle ducks" was employed in several places. Perhaps the strongest usage when Kehoe states (p. 183 that "Compared to the political sophistication displayed by so many social anthropologists, mainstream American archaeologists have been petrified puddle ducks." The term "petrified puddle ducks" had a nice ring to it but I confess I did not remember the context that Taylor employed it in, so I repaired to the vol­ume to re-educate myself.

  13. Progressive Business: An Intellectual History of the Role of Business in American Society

    DEFF Research Database (Denmark)

    Christiansen, Christian O.

    of the ruling class. The book helps explain how capitalism regained its social legitimacy in the face of different kinds of legitimacy crises, by appealing to ideals such as the social responsibility of industrialists, the soulful corporation, serving the public, or responsibility for humanity and life itself....... Through a history of the idea of progressive business and its critics, we can not only get a better understanding of how and why it has been advocated—but also for what reasons it has disturbed critics from the right, who often feared that it would undermine the shareholder view of the corporation...

  14. The Phase Space of z~1.2 SpARCS Clusters: Using Herschel to probe Dust Temperature as a Function of Environment and Accretion History

    CERN Document Server

    Noble, A G; Yee, H K C; Muzzin, A; Wilson, G; van der Burg, R F J; Balogh, M L; Shupe, D L


    We present a five-band Herschel study (100-500um) of three galaxy clusters at z~1.2 from the Spitzer Adaptation of the Red-Sequence Cluster Survey (SpARCS). With a sample of 120 spectroscopically-confirmed cluster members, we investigate the role of environment on galaxy properties utilizing the projected cluster phase space (line-of-sight velocity versus clustercentric radius), which probes the time-averaged galaxy density to which a galaxy has been exposed. We divide cluster galaxies into phase-space bins of (r/r200) x (v/sigma_v), tracing a sequence of accretion histories in phase space. Stacking optically star-forming cluster members on the Herschel maps, we measure average infrared star formation rates, and, for the first time in high-redshift galaxy clusters, dust temperatures for dynamically distinct galaxy populations---namely, recent infalls and those that were accreted onto the cluster at an earlier epoch. Proceeding from the infalling to virialized (central) regions of phase space, we find a steady...

  15. "Artforum," Andy Warhol, and the Art of Living: What Art Educators Can Learn from the Recent History of American Art Writing (United States)

    Carrier, David


    What is the best way to understand the recent development of American art? An older tradition of commentary focuses on the role of tradition, noting how each new form of painting is rooted in a long history. But Jack Bankoswky and some other art writers discussing Andy Warhol have adapted a different approach, arguing that his art breaks radically…

  16. Slavery, the Civil War Era, and African American Representation in U.S. History: An Analysis of Four States' Academic Standards (United States)

    Anderson, Carl B.; Metzger, Scott Alan


    This study is a mixed-methods text analysis of African American representation within K-12 U.S. History content standards treating the revolutionary era, the early U.S. republic, the Civil War era, and Reconstruction. The states included in the analysis are Michigan, New Jersey, South Carolina, and Virginia. The analysis finds that the reviewed…

  17. Resisting Official Knowledge: The Incorporation and Abjection of Race and Poverty in High School American History Textbooks, 1960s-2000s (United States)

    Kearl, Benjamin Kelsey


    Through an interpretive analysis of how high school American history textbooks depict the urban-riots of the late-1960s, in this article the author discusses how textbooks incorporate and abject official knowledge related to the intersections of race and poverty. Incorporation is related with Raymond Williams' theory of the selective tradition and…

  18. Mindfulness-Based Stress Reduction for Low-Income, Predominantly African American Women with PTSD and a History of Intimate Partner Violence (United States)

    Dutton, Mary Ann; Bermudez, Diana; Matas, Armely; Majid, Haseeb; Myers, Neely L.


    In this article, we consider the use of Mindfulness-Based Stress Reduction (MBSR; Kabat-Zinn, 1991) as a community-based intervention for posttraumatic stress disorder (PTSD) among low-income, predominantly African American women with a history of intimate partner violence (IPV). The results of a pilot randomized clinical trial (RCT) of MBSR as an…

  19. History and Progress of the North American Soil Geochemical Landscapes Project,2001-2010

    Institute of Scientific and Technical Information of China (English)

    David B.Smith; William F.Cannon; Laurel G.Woodruff; Francisco Moreira Rivera; Andrew N.Rencz; Robert G.Garrett


    In 2007,the U.S.Geological Survey,the Geological Survey of Canada,and the Mexican Geological Survey initiated a low-density(1 site per 1600 km2,13323 sites) geochemical and mineralogical survey of North American soils(North American Soil Geochemical Landscapes Project).Sampling and analytical protocols were developed at a series of workshops in 2003-2004 and pilot studies were conducted from 2004-2007.The ideal sampling protocol at each site includes a sample from 0-5 cm depth,a composite of the soil A horizon,and a sample from the soil C horizon.The 2-mm fraction of each sample is analyzed for Al,Ca,Fe,K,Mg,Na,S,Ti,Ag,Ba,Be,Bi,Cd,Ce,Co,Cr,Cs,Cu,Ga,In,La,Li,Mn,Mo,Nb,Ni,P,Pb,Rb,Sb,Sc,Sn,Sr,Te,Th,Tl,U,V,W,Y,and Zn by inductively coupled plasma-mass spectrometry and inductively coupled plasma-atomic emission spectrometry following a near-total digestion in a mixture of HCl,HNO3,HClO4,and HF.Separate methods are used for As,Hg,Se,and total C on this same size fraction.The major mineralogical components are determined by a quantitative X-ray diffraction method.Sampling in the conterminous U.S.was completed in 2010(c.4800 sites) with chemical and mineralogical analysis currently underway.In Mexico,approximately 66% of the sampling(871 sites) had been done by the end of 2010 with completion expected in 2012.After completing sampling in the Maritime provinces and portions of other provinces(472 sites,7.6% of the total),Canada withdrew from the project in 2010.Preliminary results for a swath from the central Florida clearly show the effects of soil parent material and climate on the chemical and mineralogical composition of soils.A sample archive will be established and made available for future investigations.

  20. [The William P. Didusch Center for Urologic History of the American Urological Association: new exciting approaches in presenting urologic history, not only in the USA - a personal guided tour]. (United States)

    Engel, R M


    The Didusch Center for Urologic History encompasses a rich and varied collection of drawings, photographs, and instruments of historical importance to urology, many displayed in the urological exhibits during the American Urological Association (AUA) conventions. The Center also houses a library devoted to urological and early medical texts and the AUA archives and is the institution of research in all fields of urologic history in the USA. The museum collection features most of Didusch's original drawings, as well as an impressive instrument collection acquired primarily through donations by urologists. The original William P. Didusch Museum (now known as the William P. Didusch Center for Urologic History) was originally housed in the AUA's Baltimore City headquarters building. Upon the association's move to Linthicum, MD in 2003, the museum has evolved into the William P. Didusch Center for Urologic History and taken on new tasks and responsibilities that include the topic of research in urologic history.

  1. The Pan American Health Organization and international health: a history of training, conceptualization, and collective development. (United States)

    Auer, Annella; Guerrero Espinel, Juan Eduardo


    A constantly changing and increasingly complex global environment requires leaders with special competencies to respond effectively to this scenario. Within this context, the Pan American Health Organization (PAHO) goes beyond traditional leadership training models both in terms of its design as well as its conceptual approach to international health. As an intergovernmental, centenary organization in health, PAHO allows participants a unique vantage point from which to conceptualize, share experiences and develop projects relevant to international health. Derived from over two decades of experience (1985-2006) training professionals through its predessor Training Program in International Health, the Leaders in International Health Program "Edmundo Granda Ugalde" (LIHP) utilizes an innovative design, virtual and practical learning activities, and a problem-based approach to analyze the main concepts, theories, actors, forces, and processes relevant to international health. In collaboration with PAHO/WHO Representative Offices and national institutions, participants develop country projects based on priority health issues, many of which are integrated into the Organization's technical cooperation and/or implemented by relevant ministries and other entities in their respective countries/subregions. A total of 185 participants representing 31 countries have participated in the LIHP since its inception in 2008, building upon the 187 trained through its predecessor. These initiatives have contributed to the development of health professionals in the Region of the Americas devoted to international health, as well as provided important input towards a conceptual understanding of international health by fostering debate on this issue.

  2. The history and politics of US health care policy for American Indians and Alaskan Natives. (United States)

    Kunitz, S J


    This paper traces the development of the US federal government's program to provide personal and public health services to American Indians and Alaska Natives since the 1940s. Minimal services had been provided since the mid 19th century through the Bureau of Indian Affairs of the Department of the Interior. As a result of attempts by western congressmen to weaken and destroy the bureau during the 1940s, responsibility for health services was placed with the US Public Health Service. The transfer thus created the only US national health program for civilians, providing virtually the full range of personal and public health services to a defined population at relatively low cost. Policy changes since the 1970s have led to an emphasis on self-determination that did not exist during the 1950s and 1960s. Programs administered by tribal governments tend to be more expensive than those provided by the Indian Health Service, but appropriations have not risen to meet the rising costs, nor are the appropriated funds distributed equitably among Indian Health Service regions. The result is likely to be an unequal deterioration in accessibility and quality of care.

  3. The Origin of S0s in Clusters: evidence from the bulge and disc star formation histories

    CERN Document Server

    Johnston, Evelyn J; Merrifield, Michael R


    The individual star formation histories of bulges and discs of lenticular (S0) galaxies can provide information on the processes involved in the quenching of their star formation and subsequent transformation from spirals. In order to study this transformation in dense environments, we have decomposed long-slit spectroscopic observations of a sample of 21 S0s from the Virgo Cluster to produce one-dimensional spectra representing purely the bulge and disc light for each galaxy. Analysis of the Lick indices within these spectra reveals that the bulges contain consistently younger and more metal-rich stellar populations than their surrounding discs, implying that the final episode of star formation within S0s occurs in their central regions. Analysis of the $\\alpha$-element abundances in these components further presents a picture in which the final episode of star formation in the bulge is fueled using gas that has previously been chemically enriched in the disc, indicating the sequence of events in the transfo...

  4. Impact of Abuse History on Adolescent African-American Women’s Current HIV/STD-associated Behaviors and Psychosocial Mediators of HIV/STD Risk (United States)

    Brown, Jennifer L.; Young, April M.; Sales, Jessica M.; DiClemente, Ralph J.; Rose, Eve S.; Wingood, Gina M.


    This study examined if relationship power, sex refusal self-efficacy, and/or fear of condom negotiation mediated the relationship between abuse history and consistent condom use (CCU) among African-American female adolescents (n=593). Participants with an abuse history (58%) were less likely to report CCU (p=.003). Women with an abuse history reported less relationship power (p=.006) and self-efficacy for refusing sex (p<.001), and more fear of condom negotiation (p=.003), none of which independently or jointly mediated the association between abuse and CCU. Notably, history of abuse was associated with CCU across mediator models (p=.037 to p=.067), despite inclusion of psychosocial mediators. This study demonstrates the importance of understanding adolescents’ condom use behaviors within the context of their life experiences, especially past abuse history. PMID:25505369

  5. A meningioma and its consequences for American history and the rise of neurosurgery. (United States)

    Ansari, Shaheryar F; Gianaris, Nicholas G; Cohen-Gadol, Aaron A


    The case of General Leonard Wood is notable both for its contribution to the field of neurosurgery and its historical significance. As one of Harvey Cushing's first successful brain tumor operations in 1910, Wood's surgery was part of the case series that culminated in Cushing's monograph Meningioma. This case was important to the rise of Cushing's career and his recognition as a member of the next generation of neurosurgeons who did not settle for mere bony decompression to taper intracranial tension but who dared to pursue intradural resections-operations that had been performed by surgeons for decades but were frowned upon because of the attendant risks. Cushing's operation to remove a recurrent brain tumor ended Wood's life in 1927. The authors discuss the effects the tumor may have had on Wood's life and career, explore an alternate explanation for the cause of Wood's death, and provide a brief account of the life of General Wood, highlighting events in his military and administrative career juxtaposed against the progression of his illness. Furthermore, the case history of the General is reviewed, using information drawn from the original patient notes and recently discovered images from the Cushing Brain Tumor Registry that elucidate more details about General Wood's story, from the injury that caused his first tumor to his final surgery, leading to his demise.

  6. The dynamic evolutionary history of genome size in North American woodland salamanders. (United States)

    Newman, Catherine E; Gregory, T Ryan; Austin, Christopher C


    The genus Plethodon is the most species-rich salamander genus in North America, and nearly half of its species face an uncertain future. It is also one of the most diverse families in terms of genome sizes, which range from 1C = 18.2 to 69.3 pg, or 5-20 times larger than the human genome. Large genome size in salamanders results in part from accumulation of transposable elements and is associated with various developmental and physiological traits. However, genome sizes have been reported for only 25% of the species of Plethodon (14 of 55). We collected genome size data for Plethodon serratus to supplement an ongoing phylogeographic study, reconstructed the evolutionary history of genome size in Plethodontidae, and inferred probable genome sizes for the 41 species missing empirical data. Results revealed multiple genome size changes in Plethodon: genomes of western Plethodon increased, whereas genomes of eastern Plethodon decreased, followed by additional decreases or subsequent increases. The estimated genome size of P. serratus was 21 pg. New understanding of variation in genome size evolution, along with genome size inferences for previously unstudied taxa, provide a foundation for future studies on the biology of plethodontid salamanders.

  7. The Holocene History of the North American Flux lobe: New Constraints From Fish Lake, Harney County, Oregon (United States)

    Stoner, J. S.; Abbott, M. B.; Ziegler, L. B.; Reilly, B. T.; Finkenbinder, M. S.; Hatfield, R. G.; Hillman, A. L.; Konyndyk, D.


    To constrain the Holocene history of the North American flux lobe we present new relative paleointensity (RPI) and paleomagnetic secular variation (PSV) data from Fish Lake, Harney County Oregon. Located high on Steens Mt, Fish Lake (42° 44' 15" N, 118° 38' 57" W, 2,246.7 m) is the largest of several lakes in the Fish Lake glacial valley. Cored along with Pate Lake in the summer of 2012, sediment from four offset holes were cored to a maximum depth of 9 m using a UWITEC coring system. Field based magnetic susceptibility insured that a completely duplicated sediment sequence was recovered. Computer tomographic scans confirmed the quality of the recovered sediment and allowed precise mapping of overlapping sequences. Additional physical properties data, along with Pb-210, radiocarbon dating and discrete tephra layers, including Mazama, tightly constrain this sequence from -0.06 to 14 ka. Progressive alternating field demagnetization of u-channel samples demonstrate that a consistently strong, stable, and low coercivity magnetization is preserved, with low MAD values both before and after deconvolution. Inclinations vary around expected values for the site latitude, with no evidence for inclination shallowing as suggested in previous studies. Declination was reconstructed by initially rotating the declination of each drive to a mean of zero, then further rotating to achieve maximum alignment of overlapping sections, followed by a final rotation of the entire sequence base upon a 400 yr historical model calibration. Remanence is normalized using ARM acquisition, ARM demagnetization, and IRM demagnetization and agreement between these suggests that RPI is preserved. RPI from Fish Lake provides a previously missing proxy for the North American flux lobe that invites comparison with other high quality, high resolution, and independently dated paleomagnetic and archeomagnetic records from the NE Pacific to Europe; allowing us to tease out modes of variability of a large

  8. Sexual victimization and family violence among urban African American adolescent women: do violence cluster profiles predict partner violence victimization and sex trade exposure? (United States)

    Kennedy, Angie C; Bybee, Deborah; Kulkarni, Shanti J; Archer, Gretchen


    Guided by an intersectional feminist perspective, we examined sexual victimization, witnessing intimate partner violence (IPV) in the family, and familial physical abuse among a sample of 180 urban African American adolescent women. We used cluster analysis to better understand the profiles of cumulative victimization, and the relationships between profiles and IPV victimization and personal exposure to the sex trade. Just under one third of the sample reported sexual victimization, with cooccurrence with both forms of family violence common. The cluster profile with high levels of severe family violence was associated with the highest rate of IPV victimization and sex trade exposure.

  9. Big Bangs in Galaxy Clusters: Using X-ray Temperature Maps to Trace Merger Histories in Clusters with Radio Halos/Relics (United States)

    Burns, Jack O.; Datta, Abhirup; Hallman, Eric J.


    Galaxy clusters are assembled through large and small mergers which are the most energetic events ("bangs") since the Big Bang. Cluster mergers "stir" the intracluster medium (ICM) creating shocks and turbulence which are illuminated by ~Mpc-sized radio features called relics and halos. These shocks heat the ICM and are detected in x-rays via thermal emission. Disturbed morphologies in x-ray surface brightness and temperatures are direct evidence for cluster mergers. In the radio, relics (in the outskirts of the clusters) and halos (located near the cluster core) are also clear signposts of recent mergers. Our recent ENZO cosmological simulations suggest that around a merger event, radio emission peaks very sharply (and briefly) while the x-ray emission rises and decays slowly. Hence, a sample of galaxy clusters that shows both luminous x-ray emission and radio relics/halos are good candidates for very recent mergers. We are in the early stages of analyzing a unique sample of 48 galaxy clusters with (i) known radio relics and/or halos and (ii) significant archival x-ray observations (>50 ksec) from Chandra and/or XMM. We have developed a new x-ray data analysis pipeline, implemented on parallel processor supercomputers, to create x-ray surface brightness, high fidelity temperature, and pressure maps of these clusters in order to study merging activity. The temperature maps are made using three different map-making techniques: Weighted Voronoi Tessellation, Adaptive Circular Binning, and Contour Binning. In this talk, we will show preliminary results for several clusters, including Abell 2744 and the Bullet cluster. This work is supported by NASA ADAP grant NNX15AE17G.

  10. Insights into the Evolutionary History of an Extinct South American Freshwater Snail Based on Historical DNA (United States)

    Strong, Ellen E.; Rumi, Alejandra; Peso, Juana G.


    Highly oxygenated freshwater habitats in the High Paraná River (Argentina–Paraguay) were home to highly endemic snails of the genus Aylacostoma, which face extinction owing to the impoundment of the Yacyretá Reservoir in the 1990s. Two species, A. chloroticum and A. brunneum, are currently included in an ongoing ex situ conservation programme, whereas A. guaraniticum and A. stigmaticum are presumed extinct. Consequently, the validity and affinities of the latter two have remained enigmatic. Here, we provide the first molecular data on the extinct A. stigmaticum by means of historical DNA analysis. We describe patterns of molecular evolution based on partial sequences of the mitochondrial 12S ribosomal RNA gene from the extinct species and from those being bred within the ex situ programme. We further use this gene to derive a secondary structure model, to examine the specific status of A. stigmaticum and to explore the evolutionary history of these snails. The secondary structure model based on A. stigmaticum revealed that most polymorphic sites are located in unpaired regions. Our results support the view that the mitochondrial 12S region is an efficient marker for the discrimination of species, and the extinct A. stigmaticum is recognized here as a distinct evolutionary genetic species. Molecular phylogenetic analyses revealed a sister group relationship between A. chloroticum and A. brunneum, and estimated divergence times suggest that diversification of Aylacostoma in the High Paraná River might have started in the late Miocene via intra-basin speciation due to a past marine transgression. Finally, our findings reveal that DNA may be obtained from dried specimens at least 80 years after their collection, and confirms the feasibility of extracting historical DNA from museum collections for elucidating evolutionary patterns and processes in gastropods. PMID:28033407

  11. 跨国主义与美国移民史学%Transnationalism and American Immigration History

    Institute of Scientific and Technical Information of China (English)



    In recent years,the rise of"transnationalism"has brought great impact to the academic cir-cles.Some of the viewpoints once considered as taboos in American immigration history,including"dual-nationalism"and"Diaspora theory",are now being recognized by more and more scholars and become a hot topic.However,although many established opinions have been substantially revised under the influ-ence of"transnationalism",It would be wrong to overemphasize the transnational factors or even underesti-mate or deny the role of the nation-state.Otherwise,the research on immigration history will be led into a wrong direction.%近年来兴起的“跨国主义”思潮给史学界带来了不小的冲击。美国移民史学中曾经被视为禁忌的一些观点,包括“双重民族主义”和“散居论”等等,现在正得到越来越多学者的认同,并且成为热门话题。在“跨国主义”思潮的影响下,许多已成定论的观点都得到了大幅修正或者即将被修正。不过,虽然“跨国主义”理论为美国移民史的研究开了风气,但如果我们过分强调跨国因素,进而轻视甚至否定民族国家的作用,也会令移民史的研究走上歧途。

  12. The emergence of computer science instructional units in American colleges and universities (1950--1975): A history (United States)

    Conners, Susan Elaine

    The purpose and scope of this dissertation is to investigate the origins and development of academic computer science units in American higher education and examine the intent and structure of their curricula. Specifically the study examines selected undergraduate and graduate curricula that developed from 1950 to 1975. This dissertation examines several of the earliest academic units formed and the issues surrounding their formation. This study examines some of the variety of courses and programs that existed among the early computer science programs. The actual titles of the units varied but they shared a common overreaching goal to study computers. The departments formed in various methods and some units were a subset of other departments. Faculties of these new units were often comprised of faculty members from various other disciplines. This dissertation is an exploration of the connections between a variety of diverse institutions and the new computer science discipline that formed from these early academic roots. While much has been written about the history of hardware and software development and the individual pioneers in the relatively new computer science discipline, the history of the academic units was documented primarily based on individual institutions. This study uses a wider lens to examine the patterns of these early academic units as they formed and became computer science units. The successes of these early pioneers resulted in a proliferation of academic computer programs in the following decades. The curricular debates continue as the number and purposes of these programs continue to expand. This dissertation seeks to provide useful information for future curricular decisions by examining the roots of the academic computer science units.

  13. A review of American psychiatry through its diagnoses: the history and development of the Diagnostic and Statistical Manual of Mental Disorders. (United States)

    Fischer, Bernard A


    The history of the Diagnostic and Statistical Manual of Mental Disorders (DSM) reflects the larger history of American psychiatry. As the field anticipates DSM-5, it is useful to take stock of this history and consider not only how diagnosis impacts our understanding of mental illness but also how contemporary thought influences diagnosis. Before the DSM, the field was disjointed. The publication of the first American diagnostic manual, the precursor of the DSM, mirrored society's interest in organized record keeping and prevention rather than treatment of mental illness. The first and second editions of DSM brought a common language to diagnosis and were largely the work of outpatient and academic psychiatrists rather than those based in large state hospitals. The third edition of the DSM saw the shift in American psychiatry's leadership from the eminent clinician to the researcher, whereas the fourth edition reflected the rise of "evidence-based medicine." DSM-5 will likewise represent the current status of the field-not only with regard to science but also reflecting the place of American psychiatry in medicine today.

  14. Selection and quality assessment of Landsat data for the North American forest dynamics forest history maps of the US (United States)

    Schleeweis, Karen; Goward, Samuel N.; Huang, Chengquan; Dwyer, John L.; Dungan, Jennifer L.; Lindsey, Mary A.; Michaelis, Andrew; Rishmawi, Khaldoun; Masek, Jeffery G.


    Using the NASA Earth Exchange platform, the North American Forest Dynamics (NAFD) project mapped forest history wall-to-wall, annually for the contiguous US (1986–2010) using the Vegetation Change Tracker algorithm. As with any effort to identify real changes in remotely sensed time-series, data gaps, shifts in seasonality, misregistration, inconsistent radiometry and cloud contamination can be sources of error. We discuss the NAFD image selection and processing stream (NISPS) that was designed to minimize these sources of error. The NISPS image quality assessments highlighted issues with the Landsat archive and metadata including inadequate georegistration, unreliability of the pre-2009 L5 cloud cover assessments algorithm, missing growing-season imagery and paucity of clear views. Assessment maps of Landsat 5–7 image quantities and qualities are presented that offer novel perspectives on the growing-season archive considered for this study. Over 150,000+ Landsat images were considered for the NAFD project. Optimally, one high quality cloud-free image in each year or a total of 12,152 images would be used. However, to accommodate data gaps and cloud/shadow contamination 23,338 images were needed. In 220 specific path-row image years no acceptable images were found resulting in data gaps in the annual national map products.

  15. Founding, early history, and transformation of the Journal for Lipid Research to an American Society of Biochemistry and Molecular Biology journal. (United States)

    Dennis, Edward A


    The Journal of Lipid Research was founded in October, 1959 and has had a long and distinguished history. It evolved from an initial concept of a loose-leaf methodology handbook to a major journal for the lipid field. Its growth has in many ways paralleled the growth and expansion of lipid research. Today, it is operated as a journal of the American Society for Biochemistry and Molecular Biology at the forefront of biomedical research on lipids.

  16. A Re-examination on the writers of the “Roaring 20s”and their significance in the history of American Literature

    Institute of Scientific and Technical Information of China (English)



    <正>Ⅰ.Introduction Two disasters,the World WarⅠwhich ended in 1919 and the Great Depression began in 1929,distinguish the 1920s from the rest of the American history.These 10 years,called"the Roaring 20s",is a period of peaceful development,flourishing and encouraging,and a period of shapely changes,disturbing and annoying(Tao,1).Many famous writers appeared in this critical

  17. Dissecting 30 Doradus: Optical and Near Infrared Star Formation History of the starburst cluster NGC2070 from the Hubble Tarantula Treasury Project (United States)

    Cignoni, Michele


    I will present new results on the star formation history of 30 Doradus in the Large Magellanic Cloud based on the panchromatic imaging survey Hubble Tarantula Treasury Project (HTTP). Here the focus is on the starburst cluster NGC2070. The star formation history is derived by comparing the deepest ever optical and NIR color-magnitude diagrams (CMDs) with state-of-the-art synthetic CMDs generated with the latest PARSEC models, which include all stellar phases from pre-main sequence (PMS) to post-main sequence. For the first time in this region we are able to measure the star formation using intermediate and low mass stars simultaneously. Our results suggest that NGC2070 experienced a prolonged activity. I will discuss the detailed star formation history, initial mass function and reddening distribution and how these relate to previous studies of this starburst region.

  18. Is the Escape Velocity in Star Clusters Linked to Extended Star Formation Histories? Using NGC 7252: W3 as a Test Case

    CERN Document Server

    Cabrera-Ziri, I; Hilker, M; Davies, B; Schweizer, F; Kruijssen, J M D; Mejía-Narváez, A; Niederhofer, F; Brandt, T D; Rejkuba, M; Bruzual, G; Magris, G


    The colour-magnitude diagrams of some intermediate-age clusters (1-2 Gyr) star clusters show unexpectedly broad main-sequence turnoffs, raising the possibility that these clusters have experienced more than one episode of star formation. Such a scenario predicts the existence of an extended main sequence turn off (eMSTO) only in clusters with escape velocities above a certain threshold ($>15$ km s$^{-1}$), which would allow them to retain or accrete gas that eventually would fuel a secondary extended star-formation episode. This paper presents a test of this scenario based on the study of the young and massive cluster NGC 7252: W3. We use the HST photometry from WFPC2 and WFC3 images obtained with UV and optical filters, as well as MagE echellette spectrograph data from the Las Campanas Clay 6.5m telescope, in order to construct the observed UV/optical SED of NGC 7252: W3. The observations are then compared with synthetic spectra based on different star formation histories consistent with those of the eMSTO c...


    Energy Technology Data Exchange (ETDEWEB)

    Ferré-Mateu, Anna [Subaru Telescope, Hilo, HI 96720 (United States); Sánchez-Blázquez, Patricia [Departamento de Física Teórica, Universidad Autónoma de Madrid, E-28049 Cantoblanco, Madrid (Spain); Vazdekis, Alexandre; De la Rosa, Ignacio G., E-mail: [Instituto de Astrofísica de Canarias, E-38205 La Laguna, Tenerife (Spain)


    We present a detailed stellar population analysis for a sample of 24 early-type galaxies (ETGs) belonging to the rich cluster RX J0152.7-1357 at z = 0.83. We have derived the age, metallicity, abundance pattern, and star formation history (SFH) for each galaxy individually to further characterize this intermediate-z reference cluster. We then study how these stellar population parameters depend on the local environment. This provides a better understanding on the formation timescales and subsequent evolution of the substructures in this cluster. We have also explored the evolutionary link between z ∼ 0.8 ETGs and those in the local universe by comparing the trends that the stellar population parameters followed with galaxy velocity dispersion at each epoch. We find that the ETGs in Coma are consistent with being the (passively evolving) descendants of the ETG population in RX J10152.7-1357. Furthermore, our results favor a downsizing picture, where the subclumps centers were formed first. These central parts contain the most massive galaxies, which formed the bulk of their stars in a short, burst-like event at high z. On the contrary, the cluster outskirts are populated with less-massive, smaller galaxies that show a wider variety of SFHs. In general, they present extended star formation episodes over cosmic time, which seems to be related to their posterior incorporation into the cluster around 4 Gyr after the initial event of formation.

  20. Patterns of variation at Ustilago maydis virulence clusters 2A and 19A largely reflect the demographic history of its populations. (United States)

    Kellner, Ronny; Hanschke, Christian; Begerow, Dominik


    The maintenance of an intimate interaction between plant-biotrophic fungi and their hosts over evolutionary times involves strong selection and adaptative evolution of virulence-related genes. The highly specialised maize pathogen Ustilago maydis is assigned with a high evolutionary capability to overcome host resistances due to its high rates of sexual recombination, large population sizes and long distance dispersal. Unlike most studied fungus-plant interactions, the U. maydis - Zea mays pathosystem lacks a typical gene-for-gene interaction. It exerts a large set of secreted fungal virulence factors that are mostly organised in gene clusters. Their contribution to virulence has been experimentally demonstrated but their genetic diversity within U. maydis remains poorly understood. Here, we report on the intraspecific diversity of 34 potential virulence factor genes of U. maydis. We analysed their sequence polymorphisms in 17 isolates of U. maydis from Europe, North and Latin America. We focused on gene cluster 2A, associated with virulence attenuation, cluster 19A that is crucial for virulence, and the cluster-independent effector gene pep1. Although higher compared to four house-keeping genes, the overall levels of intraspecific genetic variation of virulence clusters 2A and 19A, and pep1 are remarkably low and commensurate to the levels of 14 studied non-virulence genes. In addition, each gene is present in all studied isolates and synteny in cluster 2A is conserved. Furthermore, 7 out of 34 virulence genes contain either no polymorphisms or only synonymous substitutions among all isolates. However, genetic variation of clusters 2A and 19A each resolve the large scale population structure of U. maydis indicating subpopulations with decreased gene flow. Hence, the genetic diversity of these virulence-related genes largely reflect the demographic history of U. maydis populations.

  1. Patterns of variation at Ustilago maydis virulence clusters 2A and 19A largely reflect the demographic history of its populations.

    Directory of Open Access Journals (Sweden)

    Ronny Kellner

    Full Text Available The maintenance of an intimate interaction between plant-biotrophic fungi and their hosts over evolutionary times involves strong selection and adaptative evolution of virulence-related genes. The highly specialised maize pathogen Ustilago maydis is assigned with a high evolutionary capability to overcome host resistances due to its high rates of sexual recombination, large population sizes and long distance dispersal. Unlike most studied fungus-plant interactions, the U. maydis - Zea mays pathosystem lacks a typical gene-for-gene interaction. It exerts a large set of secreted fungal virulence factors that are mostly organised in gene clusters. Their contribution to virulence has been experimentally demonstrated but their genetic diversity within U. maydis remains poorly understood. Here, we report on the intraspecific diversity of 34 potential virulence factor genes of U. maydis. We analysed their sequence polymorphisms in 17 isolates of U. maydis from Europe, North and Latin America. We focused on gene cluster 2A, associated with virulence attenuation, cluster 19A that is crucial for virulence, and the cluster-independent effector gene pep1. Although higher compared to four house-keeping genes, the overall levels of intraspecific genetic variation of virulence clusters 2A and 19A, and pep1 are remarkably low and commensurate to the levels of 14 studied non-virulence genes. In addition, each gene is present in all studied isolates and synteny in cluster 2A is conserved. Furthermore, 7 out of 34 virulence genes contain either no polymorphisms or only synonymous substitutions among all isolates. However, genetic variation of clusters 2A and 19A each resolve the large scale population structure of U. maydis indicating subpopulations with decreased gene flow. Hence, the genetic diversity of these virulence-related genes largely reflect the demographic history of U. maydis populations.

  2. Ethnic Groups in History Textbooks. (United States)

    Glazer, Nathan; Ueda, Reed

    Six popular high school American history textbooks are examined to address accusations of overcompensation by textbook publishers as a result of the raised ethnic consciousness of the 1970s. The textbooks are: "Our American Heritage" (Silver Burdett); "The Pageant of American History" (Allyn and Bacon); "A History of Our American Republic"…

  3. When Lions Write History: Black History Textbooks, African-American Educators, & the Alternative Black Curriculum in Social Studies Education, 1890-1940 (United States)

    King, LaGarrett J.


    The African proverb, "Until the lions have their historians, tales of the hunt shall always glorify the hunter," is used to metaphorically describe how dominant groups inscribe power through historical narrative. In this article the author discusses how African-American educators between the years of 1890-1940 conceptualized citizenship…

  4. Cluster-cluster clustering (United States)

    Barnes, J.; Dekel, A.; Efstathiou, G.; Frenk, C. S.


    The cluster correlation function xi sub c(r) is compared with the particle correlation function, xi(r) in cosmological N-body simulations with a wide range of initial conditions. The experiments include scale-free initial conditions, pancake models with a coherence length in the initial density field, and hybrid models. Three N-body techniques and two cluster-finding algorithms are used. In scale-free models with white noise initial conditions, xi sub c and xi are essentially identical. In scale-free models with more power on large scales, it is found that the amplitude of xi sub c increases with cluster richness; in this case the clusters give a biased estimate of the particle correlations. In the pancake and hybrid models (with n = 0 or 1), xi sub c is steeper than xi, but the cluster correlation length exceeds that of the points by less than a factor of 2, independent of cluster richness. Thus the high amplitude of xi sub c found in studies of rich clusters of galaxies is inconsistent with white noise and pancake models and may indicate a primordial fluctuation spectrum with substantial power on large scales.

  5. Cluster-cluster clustering

    Energy Technology Data Exchange (ETDEWEB)

    Barnes, J.; Dekel, A.; Efstathiou, G.; Frenk, C.S.


    The cluster correlation function xi sub c(r) is compared with the particle correlation function, xi(r) in cosmological N-body simulations with a wide range of initial conditions. The experiments include scale-free initial conditions, pancake models with a coherence length in the initial density field, and hybrid models. Three N-body techniques and two cluster-finding algorithms are used. In scale-free models with white noise initial conditions, xi sub c and xi are essentially identical. In scale-free models with more power on large scales, it is found that the amplitude of xi sub c increases with cluster richness; in this case the clusters give a biased estimate of the particle correlations. In the pancake and hybrid models (with n = 0 or 1), xi sub c is steeper than xi, but the cluster correlation length exceeds that of the points by less than a factor of 2, independent of cluster richness. Thus the high amplitude of xi sub c found in studies of rich clusters of galaxies is inconsistent with white noise and pancake models and may indicate a primordial fluctuation spectrum with substantial power on large scales. 30 references.

  6. A mitochondrial DNA minisatellite reveals the postglacial history of jack pine (Pinus banksiana), a broad-range North American conifer. (United States)

    Godbout, Julie; Jaramillo-Correa, Juan P; Beaulieu, Jean; Bousquet, Jean


    Jack pine (Pinus banksiana Lamb.) is a broadly distributed North American conifer and its current range was covered by the Laurentian ice sheet during the last glacial maximum. To infer about the history and postglacial colonization of this boreal species, range-wide genetic variation was assessed using a new and highly variable minisatellite-like marker of the mitochondrial genome. Among the 543 trees analysed, 14 distinct haplotypes were detected, which corresponded to different repeat numbers of the 32-nucleotide minisatellite-like motif. Several haplotypes were rare with limited distribution, suggesting recent mutation events during the Holocene. At the population level, an average of 2.6 haplotypes and a mean haplotype diversity (H) of 0.328 were estimated. Population subdivision of genetic diversity was quite high with G(ST) and R(ST) values of 0.569 and 0.472, respectively. Spatial analyses identified three relatively homogeneous groups of populations presumably representative of genetically distinct glacial populations, one west and one east of the Appalachian Mountains in the United States and a third one presumably on the unglaciated northeastern coastal area in Canada. These results indicate the significant role of the northern part of the US Appalachian Mountains as a factor of vicariance during the ice age. A fourth distinct group of populations was observed in central Québec where the continental glacier retreated last. It included populations harbouring haplotypes present into the three previous groups, and it had higher level of haplotype diversity per population (H = 0.548) and lower population differentiation (G(ST) = 0.265), which indicates a zone of suture or secondary contact between the migration fronts of the three glacial populations. Introgression from Pinus contorta Dougl. var. latifolia Engelm. was apparent in one western population from Alberta. Altogether, these results indicate that the mitochondrial DNA variation of jack pine is

  7. Lifetime history of traumatic events in an American Indian community sample: heritability and relation to substance dependence, affective disorder, conduct disorder and PTSD. (United States)

    Ehlers, Cindy L; Gizer, Ian R; Gilder, David A; Yehuda, Rachael


    American Indians appear to experience a higher rate of traumatic events than what has been reported in general population surveys. American Indians also suffer higher alcohol related death rates than any other ethnic group in the U.S. population. Therefore efforts to delineate factors which may uniquely contribute to increased likelihood of trauma, post traumatic stress disorder (PTSD), and substance use disorders (SUD) over the lifetime in American Indians are important because of the high burden of morbidity and mortality that they pose to American Indian communities. Participants were American Indians recruited from reservations that were assessed with the Semi-Structured Assessment for the Genetics of Alcoholism (SSAGA), family history assessment and the stressful-life-events scale. Of the 309 participants, equivalent numbers of men and women (94%) reported experiencing traumas; however, a larger proportion of women received a PTSD diagnosis (38%) than men (29%). Having experienced multiple trauma and sexual abuse were most highly associated with PTSD. Having experienced assaultive trauma and having PTSD symptoms were both found to be moderately heritable (30-50%). Logistic regression revealed that having an anxiety and/or affective disorder and having a substance dependent diagnosis, but not having antisocial personality disorder/conduct disorder, were significantly correlated with having a diagnosis of PTSD. These studies suggest that trauma is highly prevalent in this American Indian community, it is heritable, is associated with PTSD, affective/anxiety disorders and substance dependence. Additionally, trauma, PTSD and substance dependence appear to all co-emerge in early adulthood in this high-risk population.

  8. The three-dimensional geometry and merger history of the massive galaxy cluster MACS J0358.8-2955

    CERN Document Server

    Hsu, Li-Yen; Richard, Johan


    We present results of a combined X-ray/optical analysis of the dynamics of the massive cluster MACS J0358.8-2955 (z=0.428) based on observations with the Chandra X-ray Observatory, the Hubble Space Telescope, and the Keck-I telescope on Mauna Kea. MACS J0358.8-2955 is found to be one of the most X-ray luminous clusters known at z>0.3, featuring L_X(clusters. One collision proceeds close to head-on, while the second features a significant impact parameter. The temperature variations in the intra-cluster gas, two tentative cold fronts, the radial velocities measured for cluster galaxies, and the small offsets betwe...

  9. The history of mass assembly of faint red galaxies in 28 galaxy clusters since z=1.3

    CERN Document Server

    Andreon, S


    We measure the relative evolution of the number of bright and faint (as faint as 0.05 L*) red galaxies in a sample of 28 clusters, of which 16 are at 0.50<= z<=1.27, all observed through a pair of filters bracketing the 4000 Angstrom break rest-frame. The abundance of red galaxies, relative to bright ones, is constant over all the studied redshift range, 0cluster mass, parametrized by velocity dispersion or X-ray luminosity. Our analysis, with respect to previous one, samples a wider redshift range, minimizes systematics and put a more attention to statistical issues, keeping at the same time a large number of clusters.

  10. History, place, and racial self-representation in 21st century America. (United States)

    Liebler, Carolyn A; Zacher, Meghan


    How is a person's racial self-representation related to the race history of the place in which he or she lives? We use Census Bureau data about race and ancestry to address this research question for two groups of people with mixed racial heritage: those reporting white and American Indian heritages, or reporting black and American Indian heritages. Links between history, place, and self-representation can be seen in geographic clustering for each race/ancestry response combination. We use multinomial logistic regression models to predict individuals' race/ancestry responses (e.g., white with American Indian ancestry versus white and American Indian races) using measures of local race history and the area's contemporary racial composition. Multivariate results highlight the relationship between a person's identity claims and the history of the area, net of contemporary area composition. Future research should attend to the history of the place as a potential contributor to contemporary patterns.

  11. Patterns of hospital use, family history and co-existing conditions among urban African-American and Hispanic-American children with insulin-dependent diabetes mellitus. (United States)

    Lipton, R B


    Little information is available about insulin-dependent diabetes mellitus (IDDM) when it occurs among US minorities. The incidence of IDDM among African-American and Hispanic children Diabetes among the first degree relatives of children from both ethnic groups was common, and the most frequently listed co-morbid conditions were asthma and obesity. The risk for IDDM in Chicago is among the highest for both African-origin and Hispanic children worldwide. The prevalence of asthma and obesity parallels the high prevalence of these conditions among non-diabetic children in Chicago. The ongoing epidemic of non-insulin-dependent diabetes mellitus (NIDDM) among African-Americans and US Hispanics is likely to be the reason for the large number of minority IDDM patients who have a first-degree relative with diabetes.

  12. Fruit Trees and Tamarisk Brooms: Grafting a Unique Perspective of American History in Willa Cather’s Death Comes for the Archbishop (United States)


    were experiences of [her] own" (8). She claims that Death Comes for the Archbishop, notable for its lack of driving plot, is a "special genre ," arguing...9 May 05). Murphy, John J. "Willa Cather." Ed. in Chief, J. Golden Taylor. A Literary History of the American West. < AFIT PA, I am an English Literature PhD student (and public affairs officer ©). I have a literary paper I am presenting at a conference in June

  13. Tibetans and Tibetan Americans: Helping K-8 School Librarians and Educators Understand Their History, Culture, and Literature. (United States)

    Bruno, Frank Alan; Beilke, Patricia F.


    Provides a review and listing of literature for K-8 school librarians and teachers that focuses on the geography, history, and culture of Tibet and the diverse experiences and folklore of Tibetans. Includes references, other recommended works, and an annotated bibliography divided into folklore, biography, culture and history, fiction, videos, and…

  14. William Cain Ruffin, M.D., and some history of the Ruffin family as it pertains to the American Civil War. (United States)

    Enoch, Jay M


    In the late 1970s, Prof. Herbert ("Herb") Kaufman, M.D., a fine Harvard-trained ophthalmologist who had both developed and chaired the Department of Ophthalmology, College of Medicine, University of Florida. Gainesville, FL, chose to resign his appointment there. Prof. Kaufman had accepted the Chair in Ophthalmology at Louisiana State U. in New Orleans. The writer was a member of the Department of Ophthalmology faculty in Gainesville, FL, at the time. Following Herb Kaufman's resignation, Professor William Cain Ruffin, M.D., a psychiatrist with academic credentials, was assigned to serve as the Interim Chairman of the Department of Ophthalmology at Gainesville for a few years by the then Dean of the Medical School at the U. of Florida. This paper addresses some interesting facts regarding Prof./Dr. Ruffin and his family history, particularly as that history relates to the American Civil War.

  15. The Evolution of Research on American Curriculum History%美国课程史研究的历史演进

    Institute of Scientific and Technical Information of China (English)



    美国课程史研究最早是作为传统教育史的次领域而萌芽的,秉持传统教育史的进步史观、重视史料、编年体叙写等特点。20世纪70年代,课程领域的转向和修正教育史学的兴起,促使课程史研究开始思考与教育史的关系,并自觉寻求课程历史的理论解释。20世纪90年代,在后现代、后结构思潮和课程研究“理解范式”的影响下,课程史研究走向多元理论解释的路径。应从课程史与课程理论内在关联的角度,充分认识课程史研究的学术价值。%The research on American curriculum history initially sprouted as a secondary field of the traditional history of education , with such characteristics of traditional education history as progressive views ,emphasis on historical data , and chronological narration . In 1970's , with the turning of the curriculum field and the rising of the revisionist history of education , research on curriculum history started to explore its relationship with education history , and consciously seek for the theoretical interpretation of curriculum history . In 1990's , under the influence of post‐modernism , post‐structuralism thoughts and the paradigm of understanding curriculum , research on curriculum history began to take multiple paths of theoretical interpretation . Full understanding of the academic value of research on curriculum history should be made from the perspective of the tight relationship between curriculum history and curriculum theory .

  16. A tale of a rich cluster at z$\\sim$0.8 as seen by the Star Formation Histories of its ETGs

    CERN Document Server

    Ferré-Mateu, Anna; Vazdekis, Alexandre; de la Rosa, Ignacio G


    We present a detailed stellar population analysis for a sample of 24 early-type galaxies belonging to the rich cluster RXJ0152.7-1357 at z=0.83. We have derived the age, metallicity, abundance pattern and star formation history for each galaxy individually, to further characterize this intermediate-z reference cluster. We then study how these stellar population parameters depend on local environment. This provides a better understanding on the formation timescales and subsequent evolution of the substructures in this cluster. We have also explored the evolutionary link between z$\\sim$0.8 ETGs and those in the local Universe by comparing the trends that the stellar population parameters follow with galaxy velocity dispersion at each epoch. We find that the ETGs in Coma are consistent with being the (passively-evolving) descendants of the ETG population in RXJ10152.7-1357. Furthermore, our results favor a downsizing picture, where the subclumps centers were formed first. This central parts contain the most mass...

  17. The history of the German Cardiac Society and the American College of Cardiology and their two founders. (United States)

    Lüderitz, Berndt; Holmes, David R; Harold, John


    The German Cardiac Society is the oldest national cardiac society in Europe, founded on June 3, 1927, in Bad Nauheim by Dr. Bruno Kisch and Professor Arthur Weber. They were actively supported by Dr. Franz Groedel, who together with Kisch became co-founders of the American College of Cardiology in 1949. Both Groedel and Kisch would be proud to see the fulfillment of their visions and dreams, which was commemorated at the joint session of the two societies held during the 78th annual meeting of the German Cardiac Society in Mannheim, Germany. "It is ironic that their dreadful years in Germany and their loss to German Cardiology helped to contribute to advances in American and international Cardiology," said Dr. Simon Dack, American College of Cardiology president in 1956 and 1957. The legacy of Groedel might be reflected by his own words: "We will meet the future not merely by dreams but by concerned action and inextinguishable enthusiasm".

  18. 美国课程史研究的演进%The Evolution of American Curriculum Histories

    Institute of Scientific and Technical Information of China (English)



    After its independence as a research field,curriculum history kept absorbing theories from history and curriculum studies,became a unique form of curriculum inquiry,and made the shift of its focus“from macro level to micro level,from reconstruction to deconstruction,and from the center to the edge”. Taken the context of both curriculum theories and historical studies into consideration,the evolution of curriculum historical studies in America was described in three dimensions:from intellectual history to so-cial history,then to cultural history;from reconstructive history to constructive history and then to decon-structive history;and from a single subject to multi-subjects,and then to rethinking of the “subject”as a construction of history.%课程史研究在美国成为独立的研究领域后,不断从史学和课程理论中汲取养分,发展为一种独特的课程探究方式,并实现了“从宏观到微观、从还原到解构、从中心到边缘”的研究重心转移。结合课程理论和史学研究的整体学术境脉,可从三个维度考察美国课程史研究的演变趋势:从思想史转向社会史再转向新文化史;从重构史学到建构史学再到解构史学;关注的“主体”从单一转向多元,再转而对作为历史的建构物的“主体”本身进行反思。

  19. Evolutionary history of HIV-1 subtype B and CRF01_AE transmission clusters among men who have sex with men (MSM) in Kuala Lumpur, Malaysia. (United States)

    Ng, Kim Tien; Ong, Lai Yee; Lim, Sin How; Takebe, Yutaka; Kamarulzaman, Adeeba; Tee, Kok Keng


    HIV-1 epidemics among men who have sex with men (MSM) continue to expand in developed and developing countries. Although HIV infection in MSM is amongst the highest of the key affected populations in many countries in Southeast Asia, comprehensive molecular epidemiological study of HIV-1 among MSM remains inadequate in the region including in Malaysia. Here, we reported the phylodynamic profiles of HIV-1 genotypes circulating among MSM population in Kuala Lumpur, Malaysia. A total of n = 459 newly-diagnosed treatment-naïve consenting subjects were recruited between March 2006 and August 2012, of whom 87 (18.9%) were self-reported MSM. Transmitted drug resistance mutations were absent in these isolates. Cumulatively, phylogenetic reconstructions of the pro-rt gene (HXB2∶2253-3275) showed that HIV-1 subtype B and CRF01_AE were predominant and contributed to approximately 80% of the total HIV-1 infection among MSM. In addition to numerous unique transmission lineages within these genotypes, twelve monophyletic transmission clusters of different sizes (2-7 MSM sequences, supported by posterior probability value of 1) were identified in Malaysia. Bayesian coalescent analysis estimated that the divergence times for these clusters were mainly dated between 1995 and 2005 with four major transmission clusters radiating at least 12 years ago suggesting that active spread of multiple sub-epidemic clusters occurred during this period. The changes in effective population size of subtype B showed an exponential growth within 5 years between 1988 and 1993, while CRF01_AE lineage exhibited similar expansion between 1993 and 2003. Our study provides the first insight of the phylodynamic profile of HIV-1 subtype B and CRF01_AE circulating among MSM population in Kuala Lumpur, Malaysia, unravelling the importance of understanding transmission behaviours as well as evolutionary history of HIV-1 in assessing the risk of outbreak or epidemic expansion.

  20. Perceptions of family history and genetic testing and feasibility of pedigree development among African Americans with hypertension (United States)

    Pettey, Christina M; McSweeney, Jean C; Stewart, Katharine E; Price, Elvin T; Cleves, Mario A; Heo, Seongkum; Souder, Elaine


    Background Pedigree development, family history, and genetic testing are thought to be useful in improving outcomes of chronic illnesses such as hypertension (HTN). However, the clinical utility of pedigree development is still unknown. Further, little is known about African Americans’ (AAs’) perceptions of family history and genetic testing. Aims This study examined the feasibility of developing pedigrees for AAs with HTN and explored perceptions of family history and genetic research among AAs with HTN. Methods The US Surgeon General’s My Family Health Portrait was administered, and 30–60 minute in-person individual interviews were conducted. Descriptive statistics were used to analyze pedigree data. Interview transcripts were analyzed with content analysis and constant comparison. Results Twenty-nine AAs with HTN were recruited from one free clinic (15 women, 14 men; mean age 49 years, SD 9.6). Twenty-six (90%) reported their family history in sufficient detail to develop a pedigree. Perceptions of family history included knowledge of HTN in the family, culturally influenced family teaching about HTN, and response to family history of HTN. Most participants agreed to future genetic testing and DNA collection because they wanted to help others; some said they needed more information and others expressed a concern for privacy. Conclusion The majority of AAs in this sample possessed extensive knowledge of HTN within their family and were able to develop a three generation pedigree with assistance. The majority were willing to participate in future genetic research. PMID:25322748

  1. Constituting a Sense of "American" Identity and Place through Language and Literary Study: A Curriculum History, 1898-1912 (United States)

    Brass, Jory


    This article examines constructions of "American" identity and place in the first influential guides for English teaching published in the United States at the cusp of the 20th Century. It recovers how English teaching was to weaken youths' ties to more immediate people and places and to reorient their sense of self, others and the…

  2. "Making History Go" at a Local Community Center: Popular Media and the Construction of Historical Knowledge among African American Youth. (United States)

    Dimitriadis, Greg


    Looks at how young people use historical knowledge, gained from media sources, to deal with current situations. A group of young African Americans draw on behavioral examples from the film, "Panther," instead of school-based learning, to give them ways to deal with the Ku Klux Klan in their neighborhood. (DAJ)

  3. African American History and Culture: A Grassroots Interpretation of Culturally-Relevant Teaching for Academic Achievement and College Access (United States)

    Cross, Beverly E.


    The Achievement, Confidence and Excellence (ACE) Academy in Memphis is a partnership involving the University of Memphis, its Benjamin Hooks Institute for Social Change, and three area school districts. ACE operates as a Saturday Institute, serving three hundred seventh to twelfth grade African American students. Grounded in culturally relevant…

  4. Native American Students' Understanding of Geologic Time Scale: 4th-8th Grade Ojibwe Students' Understanding of Earth's Geologic History (United States)

    Nam, Younkyeong; Karahan, Engin; Roehrig, Gillian


    Geologic time scale is a very important concept for understanding long-term earth system events such as climate change. This study examines forty-three 4th-8th grade Native American--particularly Ojibwe tribe--students' understanding of relative ordering and absolute time of Earth's significant geological and biological events. This study also…

  5. Images of American Indians in Environmental Education: Anthropological Reflections on the Politics and History of Cultural Representation (United States)

    Willow, Anna J.


    For hundreds of years, North America's colonizers worked systematically to eradicate the indigenous cultural practices, religious beliefs, and autonomous political systems many venerate. This article illustrates that imperialist nostalgia underlies and directs portrayals of American Indians in environmental education today. Whether unconsciously…

  6. Cardiovascular disease risks in adult Native and Mexican Americans with a history of alcohol use disorders: association with cardiovascular autonomic control. (United States)

    Criado, José R; Gilder, David A; Kalafut, Mary A; Ehlers, Cindy L


    Hypertension and obesity are serious health problems that have been associated with an increased risk of cardiovascular disease (CVD). We recently showed a relationship between hypertension, obesity and cardiovagal control in a sample of Native and Mexican Americans at high risk of alcohol use disorders (AUD). While studies have shown that Native and Mexican Americans exhibit high rates of AUD, the consequences of AUD on CVD risk factors and their relationship with cardiovascular autonomic control is not well understood in these ethnic groups. This study investigated whether an association could be demonstrated between cardiovascular autonomic control and several CVD risk factors in Native and Mexican American men and women (n = 228) who are literate in English and are residing legally in San Diego County. Participants with lifetime history of AUD showed higher rates of systolic and diastolic hypertension and obesity than participants without lifetime AUD. Lifetime AUD was significantly associated with reduced HR response to deep breathing (HRDB) measure of cardiovagal control, higher current drinking quantity, and obesity. Reduced HRDB was also associated with increased systolic pre-hypertension or hypertension (pre-/hypertension) and with higher diastolic blood pressure in a linear regression model that included several diagnostic and demographic variables. HRDB and time- and frequency-domain measures of cardiovagal control were significantly reduced in participants with diastolic pre-/hypertension. These data suggest that lower cardiovagal control may play a role in the prevalence of systolic and diastolic pre-/hypertension in a community sample with a history of alcohol and substance use disorders.

  7. Spatially resolved spectroscopy and chemical history of star-forming galaxies in the Hercules cluster: the effects of the environment

    CERN Document Server

    Petropoulou, V; Iglesias-Páramo, J; Papaderos, P; Magrini, L; Cedrés, B; Reverte, D


    Spatially resolved spectroscopy has been obtained for a sample of 27 star-forming (SF) galaxies selected from our deep Halpha survey of the Hercules cluster. We have applied spectral synthesis models to all emission-line spectra of this sample using the population synthesis code STARLIGHT. We have obtained fundamental parameters of the stellar components, as the mean metallicity and age, and we have corrected the emission-line spectra for underlying stellar absorption. O/H and N/O gas chemical abundances were obtained using the latest empirical calibrations. The effects of cluster environment on the chemical evolution of galaxies and on their mass-metallicity (MZ) and luminosity-metallicity (LZ) relations were studied combining the derived gas metallicities, the mean stellar metallicities and ages, the masses and luminosities of galaxies and their existing HI data. We have found that our Hercules SF galaxies divide into three main subgroups: a) chemically evolved spirals with truncated ionized-gas disks and n...

  8. Stellar models simulating the disk-locking mechanism and the evolutionary history of the Orion Nebula cluster and NGC 2264 (United States)

    Landin, N. R.; Mendes, L. T. S.; Vaz, L. P. R.; Alencar, S. H. P.


    Context. Rotational evolution in young stars is described by pre-main sequence evolutionary tracks including non-gray boundary conditions, rotation, conservation of angular momentum, and simulations of disk-locking. Aims: By assuming that disk-locking is the regulation mechanism for the stellar angular velocity during the early stages of pre-main sequence evolution, we use our rotating models and observational data to constrain disk lifetimes (Tdisk) of a representative sample of low-mass stars in two young clusters, the Orion Nebula cluster (ONC) and NGC 2264, and to better understand their rotational evolution. Methods: The period distributions of the ONC and NGC 2264 are known to be bimodal and to depend on the stellar mass. To follow the rotational evolution of these two clusters' stars, we generated sets of evolutionary tracks from a fully convective configuration with low central temperatures (before D- and Li-burning). We assumed that the evolution of fast rotators can be represented by models considering conservation of angular momentum during all stages and of moderate rotators by models considering conservation of angular velocity during the first stages of evolution. With these models we estimate a mass and an age for all stars. Results: The resulting mass distribution for the bulk of the cluster population is in the ranges of 0.2-0.4 M⊙ and 0.1-0.6 M⊙ for the ONC and NGC 2264, respectively. For the ONC, we assume that the secondary peak in the period distribution is due to high-mass objects still locked in their disks, with a locking period (Plock) of ~8 days. For NGC 2264 we make two hypotheses: (1) the stars in the secondary peak are still locked with Plock = 5 days, and (2) NGC 2264 is in a later stage in the rotational evolution. Hypothesis 2 implies in a disk-locking scenario with Plock = 8 days, a disk lifetime of 1 Myr and, after that, constant angular momentum evolution. We then simulated the period distribution of NGC 2264 when the mean age

  9. Dissolution of Globular Clusters


    Baumgardt, Holger


    Globular clusters are among the oldest objects in galaxies, and understanding the details of their formation and evolution can bring valuable insight into the early history of galaxies. This review summarises the current knowledge about the dissolution of star clusters and discusses the implications of star cluster dissolution for the evolution of the mass function of star cluster systems in galaxies.

  10. 美国社会科课程中的史地综合%On Integration of History and Geography in Social Studies Curriculum in American

    Institute of Scientific and Technical Information of China (English)



    史地综合是当代美国社会科课程设计的主要特征之一。经过长期的研究和实践,美国学者认为:社会科课程中的历史内容设计应关注五个地理概念,即定位、区域、人与环境的相互作用、运动和地区。这五个地理概念是美国社会科课程中史地内容联系的重要纽带,并在课程和教学设计中受到普遍的关注。%Integrating History and geography is one of the main features of social studies curriculum design in contemporary America. After a long research and practice, American scholars thought that the design of history contents in social studies curriculum should pay close attention to five geographic concepts: location, place, hu- man-environment interaction, movement and regions. These five geographic concepts are important links between History and Geography in social studies curriculum and are generally valued in the design of curriculum and instruction.

  11. Trauma history in African-American women living with HIV: effects on psychiatric symptom severity and religious coping. (United States)

    Brownley, Julie R; Fallot, Roger D; Wolfson Berley, Rebecca; Himelhoch, Seth S


    Women living with HIV (WLHIV) have rates of post-traumatic stress disorder (PTSD) up to 5 times higher than the general population. Individuals living with HIV and a concurrent diagnosis of PTSD have poorer HIV-related outcomes; however, the prevalence and impact of PTSD on African-American WLHIV seeking mental health treatment is unknown. The aim of this study is to examine the associations between PTSD symptoms with psychiatric symptom severity and psychological/religious coping strategies in African-American WLHIV who are seeking mental health treatment. This is a cross-sectional study of 235 African-American WLHIV attending an urban community mental health clinic. Bivariate analyses were conducted to evaluate associations between a PTSD symptoms scale (PSS≥21 versus PSSAmerican WLHIV attending an outpatient mental health clinic had symptoms associated with PTSD. These symptoms were associated with worse mental health symptoms and utilization of dysfunctional religious and nonreligious coping strategies. Untreated PTSD in WLHIV predicts poorer HIV-related health outcomes and may negatively impact comorbid mental health outcomes. Screening for PTSD in WLHIV could identify a subset that would benefit from evidence-based PTSD-specific therapies in addition to mental health interventions already in place. PTSD-specific interventions for WLHIV with PTSD may improve outcomes, improve coping strategies, and allow for more effective treatment of comorbid mental health disorders.

  12. African-American Biography. (United States)

    Martin, Ron


    Suggests sources of information for African American History Month for library media specialists who work with students in grades four through eight. Gale Research's "African-American Reference Library," which includes "African-America Biography,""African-American Chronology," and "African-American Almanac,"…

  13. Thinking Historically, Teaching Historically: Perspectives on the Professional Development of Teachers from a Teaching American History Grant (United States)

    Sheets, Kevin B.


    In teacher's idealized history classroom, students are abuzz with questions. They are eager to jump into a serious analysis of primary sources. They relish additional opportunities to engage historiographical debates. They are, as teachers like to say, "thinking historically." While there are few easy ways to create these idealized…

  14. Power and Liberty: A Long-Term Course Planning Strategy to Encourage the Contextualization of Events in American History (United States)

    Endacott, Jason L.


    Applying a consistent historical theme throughout a social studies course is an effective long-term planning strategy that can promote student engagement, retention of information, and contextualized knowledge of history's continuity and change. This article demonstrates how one such theme, power and liberty, might be incorporated into a secondary…

  15. Life History Traits and Niche Instability Impact Accuracy and Temporal Transferability for Historically Calibrated Distribution Models of North American Birds. (United States)

    Wogan, Guinevere O U


    A primary assumption of environmental niche models (ENMs) is that models are both accurate and transferable across geography or time; however, recent work has shown that models may be accurate but not highly transferable. While some of this is due to modeling technique, individual species ecologies may also underlie this phenomenon. Life history traits certainly influence the accuracy of predictive ENMs, but their impact on model transferability is less understood. This study investigated how life history traits influence the predictive accuracy and transferability of ENMs using historically calibrated models for birds. In this study I used historical occurrence and climate data (1950-1990s) to build models for a sample of birds, and then projected them forward to the 'future' (1960-1990s). The models were then validated against models generated from occurrence data at that 'future' time. Internal and external validation metrics, as well as metrics assessing transferability, and Generalized Linear Models were used to identify life history traits that were significant predictors of accuracy and transferability. This study found that the predictive ability of ENMs differs with regard to life history characteristics such as range, migration, and habitat, and that the rarity versus commonness of a species affects the predicted stability and overlap and hence the transferability of projected models. Projected ENMs with both high accuracy and transferability scores, still sometimes suffered from over- or under- predicted species ranges. Life history traits certainly influenced the accuracy of predictive ENMs for birds, but while aspects of geographic range impact model transferability, the mechanisms underlying this are less understood.

  16. Distinct core and halo stellar populations and the formation history of the bright Coma cluster early-type galaxy NGC 4889

    CERN Document Server

    Coccato, Lodovico; Arnaboldi, Magda


    We study the stellar population far into the halo of one of the two brightest galaxies in the Coma cluster, NGC 4889, based on deep medium resolution spectroscopy with FOCAS at the Subaru 8.2m telescope. We fit single stellar population models to the measured line-strength (Lick) indices (Hbeta, Mgb, [MgFe]' and ). Combining with literature data, we construct radial profiles of metallicity, [alpha/Fe] element abundance ratio and age for NGC 4889, from the center out to ~60 kpc (~4Re). We find evidence for different chemical and star formation histories for stars inside and outside 1.2Re = 18 kpc radius. The inner regions are characterized by a steep [Z/H] gradient and high [alpha/Fe] at ~2.5 times solar value. In the halo, between 18 and 60 kpc, the [Z/H] is near-solar with a shallow gradient, while [alpha/Fe] shows a strong negative gradient, reaching solar values at ~60 kpc. We interpret these data in terms of different formation histories for both components. The data for the inner galaxy are consistent wi...

  17. Radiologic history exhibit: the American Association for Women Radiologists (AAWR): 25 years of promoting women in radiology. (United States)

    Angtuaco, Teresita L; Macura, Katarzyna J; Lewicki, Ann M; Rosado-de-Christenson, Melissa L; Rumack, Carol M


    On the 25th anniversary of the American Association for Women Radiologists (AAWR), the association's accomplishments in promoting the careers of women radiologists were reviewed. Programs that feature opportunities for women to balance their careers and their personal lives have contributed greatly to promoting networking opportunities at national meetings. Highlights of women's accomplishments in national radiology organizations underline how far women have advanced in the specialty. Future initiatives for the organization center on increasing women's involvement in recruiting and mentoring other women in radiology.

  18. Stellar models simulating the disk-locking mechanism and the evolutionary history of the Orion Nebula cluster and NGC2264

    CERN Document Server

    Landin, N R; Vaz, L P R; Alencar, S H P


    Rotational evolution in young stars is described by pMS evolutionary tracks including rotation, conservation of angular momentum (AM), and simulations of disk-locking (DL). By assuming that DL is the regulation mechanism for the stellar angular velocity during the early stages of pMS, we use our models and observational data to constrain disk lifetimes (Tdisk) of a sample of low-mass stars in the ONC and NGC2264. The period distributions of the ONC and NGC2264 are bimodal and depend on the stellar mass. To follow the rotational evolution of these two clusters' stars, we generated some sets of evolutionary tracks. We assumed that the evolution of fast rotators can be modeled by considering conservation of AM during all stages and of moderate rotators by considering conservation of angular velocity during the first stages of evolution. With these models we estimate a mass and an age for all stars. For the ONC, we assume that the secondary peak in the period distribution is due to high-mass objects locked in the...

  19. High-resolution Holocene South American monsoon history recorded by a speleothem from Botuverá Cave, Brazil (United States)

    Bernal, J. P.; Cruz, Francisco W.; Stríkis, Nicolás M.; Wang, Xianfeng; Deininger, Michael; Catunda, Maria Carolina A.; Ortega-Obregón, C.; Cheng, Hai; Edwards, R. Lawrence; Auler, Augusto S.


    A Holocene stalagmite from Botuverá Cave, southeastern Brazil was analyzed by LA-ICPMS for Mg/Ca, Sr/Ca, Ba/Ca. The observed variability in the record was demonstrated to be modulated by prior calcite precipitation, and, thus, is interpreted to reflect monsoon intensity. We find that the calcite δ18O is strongly correlated with Sr/Ca, indicating that atmospheric circulation over South America and monsoon intensity have been tightly correlated throughout most of the Holocene, both directly responding to solar precession. Comparison with other contemporaneous high-resolution hydroclimate records reveals that SAMS has shown a degree of complexity during the Holocene not previously detected, with periods where the South American Convergence Zone (SACZ) expanded to cover most of the South American sub-continent, and coincident with periods of low-SST in the north Atlantic. We also detect periods where rainfall amount in northeastern and southeastern Brazil are markedly anti-phased, suggesting a north-south migration of SACZ, which it appears to be mediated by solar irradiance. The high-resolution nature of our record allow us to examine the effect that Holocene climate anomalies had upon SAMS dynamics and hydroclimate in southeastern Brazil, in particular the 8.2 ka event and the Little Ice Age. In addition to confirm the internal structure of the events, we also detect the possible consequences of the climatic anomalies upon ocean-atmosphere interactions through its effects upon SAMS.

  20. A history of radiologic pathology correlation at the Armed Forces Institute of Pathology and its evolution into the American Institute for Radiologic Pathology. (United States)

    Murphey, Mark D; Madewell, John E; Olmsted, William W; Ros, Pablo R; Neiman, Harvey L


    The evolution of the Armed Forces Institute of Pathology (AFIP) has played an important role in the history of pathology education and in radiologic pathology correlation in the United States. From its humble beginnings as a museum, showcasing dried and varnished morbid specimens--human relics of the Civil War, the institute became a leader in pathology. Later, it became a center of instruction for radiology residents seeking to understand the pathologic findings that underlay the radiologic appearance of disease. Images were gathered by the AFIP and the American Registry of Pathology (ARP) and have been used in research and education in radiology and other fields (ophthalmology, otalaryngology, dermatology, obstetrics and gynecology, and surgery). Despite the contributions of the AFIP, the ARP, and the Radiologic Pathology Correlation Course, high-ranking members of the military and the federal government frowned on a military-owned educational system that also served civilians. Although support from the radiology community dissuaded military officers and federal officials from taking action against the participation of civilians, the 2005 Base Realignment and Closure (BRAC) provisions mandated the disestablishment of the AFIP, forcing the redistribution of some of its resources to other military-only organizations and disbanding other AFIP functions. To ensure that the correlation course, known to radiology residents as the "rad-path" course, was not a casualty of the BRAC, the American College of Radiology (ACR) and leaders of the AFIP and ARP agreed that the ACR should continue this vital educational endeavor. In January 2011, the American Institute for Radiologic Pathology of the ACR debuted and successfully instructed 268 radiology residents, including 40 international residents. The faculty and staff, who had been part of the course at the AFIP, continue to help enrich and improve the course established by their predecessors.

  1. History, law, and policy as a foundation for health care delivery for American Indian and Alaska native children. (United States)

    Thierry, Judith; Brenneman, George; Rhoades, Everett; Chilton, Lance


    Most American Indian and Alaska Native Children (AIAN) receive health care that is based on the unique historical legacy of tribal treaty obligations and a trust relationship of sovereign nation to sovereign nation. From colonial America to the early 21st century, the wellbeing of AIAN children has been impacted as federal laws were crafted for the health, education and wellbeing of its AIAN citizens. Important public laws are addressed in this article, highlighting the development of the Indian Health Service (IHS), a federal agency designed to provide comprehensive clinical and public health services to citizens of federally recognized tribes. The context during which various acts were made into law are described to note the times during which the policy making process took place. Policies internal and external to the IHS are summarized, widening the lens spanning the past 200 years and into the future of these first nations' youngest members.

  2. Partitional clustering algorithms

    CERN Document Server


    This book summarizes the state-of-the-art in partitional clustering. Clustering, the unsupervised classification of patterns into groups, is one of the most important tasks in exploratory data analysis. Primary goals of clustering include gaining insight into, classifying, and compressing data. Clustering has a long and rich history that spans a variety of scientific disciplines including anthropology, biology, medicine, psychology, statistics, mathematics, engineering, and computer science. As a result, numerous clustering algorithms have been proposed since the early 1950s. Among these algorithms, partitional (nonhierarchical) ones have found many applications, especially in engineering and computer science. This book provides coverage of consensus clustering, constrained clustering, large scale and/or high dimensional clustering, cluster validity, cluster visualization, and applications of clustering. Examines clustering as it applies to large and/or high-dimensional data sets commonly encountered in reali...

  3. The 2012 American College of Nurse-Midwives core competencies for basic midwifery practice: history and revision. (United States)

    Phillippi, Julia C; Avery, Melissa D


    The American College of Nurse-Midwives (ACNM) Core Competencies for Basic Midwifery Practice, approved in 2012, (hereafter referred to as Core Competencies) outline the knowledge, skills, and abilities that can be expected of new certified nurse-midwives (CNMs) and certified midwives (CMs). The Core Competencies are standards for midwifery education, and the document is an important guide for midwifery practice and policy. As a part of the 2012 revision, the Basic Competency Section of the ACNM Division of Education reviewed a variety of national and international documents to ensure that the basic education of CNMs/CMs is consistent with the practice of midwives in the United States and internationally. Few substantive changes were made to the document, but several areas were adjusted and clarified. New graduates continue to be prepared by midwifery education programs to provide safe, evidence-based midwifery care to women across the lifespan, well newborns up to 28 days, and sexual partners of women diagnosed with sexually transmitted infections.

  4. The vital role of the American Journal of Psychology in the early and continuing history of mental chronometry. (United States)

    O'Shea, Geoffrey; Bashore, Theodore R


    The American Journal of Psychology (AJP) was founded in 1887 by G. Stanley Hall during what Edwin G. Boring (1950) called the Period of Mental Chronometry and, consistent with the prevailing interests of the time, featured articles of relevance to scientists in this research domain. Contained in the early volumes of AJP were several articles that examined what have become some of the enduring issues faced by researchers studying the structure and timing of mental processing using reaction time (RT) procedures. Collectively, RT research published in AJP during its early years contributed to establishing mental chronometry as an important subfield of psychology. From 1900 to 1950 interest in mental chronometry waned, during what has been called its Dark Age. Nonetheless, interest in the effects of factors such as age and intelligence on total RT continued unabated. Numerous articles pertinent to these effects appeared in AJP. Finally, with the publication of Neisser's (1963) seminal work on visual search, AJP played an important role in reviving interest in mental chronometry in the latter half of the 20th century and continues in its 125th year of existence to contribute pertinent articles on contemporary research in mental chronometry.

  5. Hubble Tarantula Treasury Project: Unraveling Tarantula's Web. II. Optical and Near Infrared Star Formation History of the Starburst Cluster NGC 2070 in 30 Doradus

    CERN Document Server

    Cignoni, M; van der Marel, R P; Tosi, M; Zaritsky, D; Anderson, J; Lennon, D J; Aloisi, A; de Marchi, G; Gouliermis, D A; Grebel, E K; Smith, L J; Zeidler, P


    We present a study of the recent star formation of 30 Doradus in the Large Magellanic Cloud (LMC) using the panchromatic imaging survey Hubble Tarantula Treasury Project (HTTP). In this paper we focus on the stars within 20 pc of the center of the massive ionizing cluster of 30 Doradus, NGC 2070. We recovered the star formation history by comparing deep optical and NIR color-magnitude diagrams (CMDs) with state-of-the-art synthetic CMDs generated with the latest PARSEC models, which include all stellar phases from pre-main sequence to post- main sequence. For the first time in this region we are able to measure the star formation using intermediate and low mass stars simultaneously. Our results suggest that NGC2070 experienced a prolonged activity. In particular, we find that the star formation in the region: i) exceeded the average LMC rate ~ 20 Myr ago; ii) accelerated dramatically ~ 7 Myr ago; and iii) reached a peak value 1-3 Myr ago. We did not find significant deviations from a Kroupa initial mass funct...

  6. The Holocene history of the North American Monsoon: 'known knowns' and 'known unknowns' in understanding its spatial and temporal complexity (United States)

    Metcalfe, Sarah E.; Barron, John A.; Davies, Sarah J.


    Evidence for climatic change across the North American Monsoon (NAM) and adjacent areas is reviewed, drawing on continental and marine records and the application of climate models. Patterns of change at 12,000, 9000, 6000 and 4000 cal yr BP are presented to capture the nature of change from the Younger Dryas (YD) and through the mid-Holocene. At the YD, conditions were cooler overall, wetter in the north and drier in the south, while moving into the Holocene wetter conditions became established in the south and then spread north as the NAM strengthened. Until c. 8000 cal yr BP, the Laurentide Ice Sheet influenced precipitation in the north by pushing the Bermuda High further south. The peak extent of the NAM seems to have occurred around 6000 cal yr BP. 4000 cal yr BP marks the start of important changes across the NAM region, with drying in the north and the establishment of the clear differences between the summer-rain dominated south and central areas and the north, where winter rain is more important. This differentiation between south and north is crucial to understanding many climate responses across the NAM. This increasing variability is coincident with the declining influence of orbital forcing. 4000 cal yr BP also marks the onset of significant anthropogenic activity in many areas. For the last 2000 years, the focus is on higher temporal resolution change, with strong variations across the region. The Medieval Climate Anomaly (MCA) is characterised by centennial scale ‘megadrought’ across the southwest USA, associated with cooler tropical Pacific SSTs and persistent La Niña type conditions. Proxy data from southern Mexico, Central America and the Caribbean reveal generally wetter conditions, whereas records from the highlands of central Mexico and much of the Yucatan are typified by long -term drought. The Little Ice Age (LIA), in the north, was characterised by cooler, wetter winter conditions that have been linked with increased

  7. Recasting History: The Public Option (United States)

    Salerno, Beth


    If you ask Americans what is studied in history classrooms, many will answer "facts and dates." If you ask them what people can do with a history degree, they answer "teach." Yet those same Americans acknowledge the power and practical relevance of history as they flock to national parks, historic sites, museums, and cultural…

  8. Black-tailed and white-tailed jackrabbits in the American West: History, ecology, ecological significance, and survey methods (United States)

    Simes, Matthew; Longshore, Kathleen; Nussear, Kenneth E.; Beatty, Greg L.; Brown, David E.; Esque, Todd C.


    Across the western United States, Leporidae are the most important prey item in the diet of Golden Eagles (Aquila chrysaetos). Leporids inhabiting the western United States include black-tailed (Lepus californicus) and white-tailed jackrabbits (Lepus townsendii) and various species of cottontail rabbit (Sylvilagus spp.). Jackrabbits (Lepus spp.) are particularly important components of the ecological and economic landscape of western North America because their abundance influences the reproductive success and population trends of predators such as coyotes (Canis latrans), bobcats (Lynx rufus), and a number of raptor species. Here, we review literature pertaining to black-tailed and white-tailed jackrabbits comprising over 170 published journal articles, notes, technical reports, conference proceedings, academic theses and dissertations, and other sources dating from the late 19th century to the present. Our goal is to present information to assist those in research and management, particularly with regard to protected raptor species (e.g., Golden Eagles), mammalian predators, and ecological monitoring. We classified literature sources as (1) general information on jackrabbit species, (2) black-tailed or (3) white-tailed jackrabbit ecology and natural history, or (4) survey methods. These categories, especially 2, 3, and 4, were further subdivided as appropriate. The review also produced several tables on population trends, food habits, densities within various habitats, and jackrabbit growth and development. Black-tailed and white-tailed jackrabbits are ecologically similar in general behaviors, use of forms, parasites, and food habits, and they are prey to similar predators; but they differ in their preferred habitats. While the black-tailed jackrabbit inhabits agricultural land, deserts, and shrublands, the white-tailed jackrabbit is associated with prairies, alpine tundra, and sagebrush-steppe. Frequently considered abundant, jackrabbit numbers in western North

  9. Population genetic structure of traditional populations in the Peruvian Central Andes and implications for South American population history. (United States)

    Cabana, Graciela S; Lewis, Cecil M; Tito, Raúl Y; Covey, R Alan; Cáceres, Angela M; Cruz, Augusto F De La; Durand, Diana; Housman, Genevieve; Hulsey, Brannon I; Iannacone, Gian Carlo; López, Paul W; Martínez, Rolando; Medina, Ángel; Dávila, Olimpio Ortega; Pinto, Karla Paloma Osorio; Santillán, Susan I Polo; Domínguez, Percy Rojas; Rubel, Meagan; Smith, Heather F; Smith, Silvia E; Massa, Verónica Rubín de Celis; Lizárraga, Beatriz; Stone, Anne C


    Molecular-based characterizations of Andean peoples are traditionally conducted in the service of elucidating continent-level evolutionary processes in South America. Consequently, genetic variation among "western" Andean populations is often represented in relation to variation among "eastern" Amazon and Orinoco River Basin populations. This west-east contrast in patterns of population genetic variation is typically attributed to large-scale phenomena, such as dual founder colonization events or differing long-term microevolutionary histories. However, alternative explanations that consider the nature and causes of population genetic diversity within the Andean region remain underexplored. Here we examine population genetic diversity in the Peruvian Central Andes using data from the mtDNA first hypervariable region and Y-chromosome short tandem repeats among 17 newly sampled populations and 15 published samples. Using this geographically comprehensive data set, we first reassessed the currently accepted pattern of western versus eastern population genetic structure, which our results ultimately reject: mtDNA population diversities were lower, rather than higher, within Andean versus eastern populations, and only highland Y-chromosomes exhibited significantly higher within-population diversities compared with eastern groups. Multiple populations, including several highland samples, exhibited low genetic diversities for both genetic systems. Second, we explored whether the implementation of Inca state and Spanish colonial policies starting at about ad 1400 could have substantially restructured population genetic variation and consequently constitute a primary explanation for the extant pattern of population diversity in the Peruvian Central Andes. Our results suggest that Peruvian Central Andean population structure cannot be parsimoniously explained as the sole outcome of combined Inca and Spanish policies on the region's population demography: highland populations

  10. "Journey to the Stars": Presenting What Stars Are to Global Planetarium Audiences by Blending Astrophysical Visualizations Into a Single Immersive Production at the American Museum of Natural History (United States)

    Emmart, Carter; Mac Low, M.; Oppenheimer, B. R.; Kinzler, R.; Paglione, T. A. D.; Abbott, B. P.


    "Journey to the Stars" is the latest and fourth space show based on storytelling from data visualization at the Rose Center for Earth and Space at the American Museum of Natural History. This twenty five minute, full dome movie production presents to planetarium audiences what the stars are, where they come from, how they vary in type and over time, and why they are important to life of Earth. Over forty scientists from around the world contributed their research to what is visualized into roughly fifteen major scenes. How this production is directed into a consolidated immersive informal science experience with learning goals is an integrative process with many inputs and concerns for scientific accuracy. The goal is a seamless merger of visualizations at varying spatial and temporal scales with acuity toward depth perception, revealing unseen phenomena, and the layering of concepts together to build an understanding of stars; to blend our common experience of them in the sky with the uncommon meaning we have come to know through science. Scripted by Louise Gikow who has worked for Children's Television Workshop, narrated by Whoopie Goldberg, and musically scored by Robert Miller, this production strives to guide audiences through challenging scientific concepts by complimenting the natural beauty the subject matter presents with understandable prose and musical grandeur. "Journey to the Stars" was produced in cooperation with NASA's Science Mission Directorate, Heliophysics Division and is in release at major planetariums, worldwide.

  11. On the history of cultural psychiatry: Georges Devereux, Henri Ellenberger, and the psychological treatment of Native Americans in the 1950s. (United States)

    Delille, Emmanuel


    Henri Ellenberger (1905-1993) wrote the first French-language synthesis of transcultural psychiatry ("Ethno-psychiatrie") for the French Encyclopédie Médico-Chirurgicale in 1965. His work casts new light on the early development of transcultural psychiatry in relation to scientific communities and networks, particularly on the role of Georges Devereux (1908-1985). The Ellenberger archives offer the possibility of comparing published texts with archival ones to create a more nuanced account of the history of transcultural psychiatry, and notably of the psychological treatment of Native Americans. This paper examines some key moments in the intellectual trajectories of Devereux and Ellenberger, including Devereux's dispute with Ackerknecht, the careers of Devereux and Ellenberger as therapists at the Menninger Foundation (Topeka, Kansas) in the 1950s, and their respective positions in the research network developed by McGill University (Montreal, Quebec) with the newsletter Transcultural Research in Mental Health Problems Finally, I consider their ties to other important figures in this field as it transitioned from colonial medicine to academic medicine, including Roger Bastide (France), Henri Collomb and the Ortigues (France and Africa), as well as Eric Wittkower and Brian Murphy (Canada) and Alexander Leighton (United States and Canada).

  12. Holocene sea level history, modern-day vertical uplift and forebulge evolution: further constraints on the GIA process over the North American continent (United States)

    Roy, K.


    The intense cycles of glaciation and deglaciation that have characterized Earth's climate over the past 900,000 years have had a profound impact on the Earth system. The significant imprints that the related variations in surface mass load have had on sea level history and the Earth's shape can be employed to constrain models of the glacial isostatic adjustment (GIA) process. These models rely on two fundamental inputs, namely a history of ice-sheet loading and a representation of the variation of viscosity in the lithosphere and in the mantle. Especially important GIA related observables include Global Positioning System (GPS) observations of the movement of the solid Earth's surface and inferences of past relative sea level evolution. Depending on the region from which they originate, these data provide information on different model characteristics. In particular, while the relative sea level constrained relaxation occurring near former centers of glaciation can be relatively easily parametrized to facilitate an inversion for mantle viscosity, the same process in the regions of forebulge collapse is much more complex but nevertheless provides essential further constraints upon mantle viscosity. In this paper, we examine how recently available high-quality datasets of relative sea level evolution from the U.S. East coast (Engelhart et al., Geology, 2011) and the North American Pacific coast (Engelhart et al., QSR, 2015) can be employed, together with an extensive dataset of space-geodetic observations of present-day vertical uplift of the crust over North America (Peltier et al., JGR - Solid Earth, 2015), to further improve the latest state-of-the-art ICE-6G_C (VM5a) model (Peltier et al., JGR - Solid Earth, 2015). It will be demonstrated that the high quality of the data does not only provide further constraints on radial variations of viscosity in the mantle, but also on the history of the deglaciation that occurred over North America after the Last Glacial

  13. Sommerferiens historie

    DEFF Research Database (Denmark)

    Lützen, Karin


    Summer holiday is a pleasure which did not become available to many people until the 20th Century. The article describes the early mountain rambles of the bourgeoisie and their holidays in seaside boarding houses. Outdoor pursuits and stays in boarding houses at bathing resorts also became favour...... pattern. Finally, the history of the special holiday camps is told, which were established by American Jews because they were excluded from many hotels....

  14. Evolutionary history of trypanosomes from South American caiman (Caiman yacare) and African crocodiles inferred by phylogenetic analyses using SSU rDNA and gGAPDH genes. (United States)

    Viola, L B; Almeida, R S; Ferreira, R C; Campaner, M; Takata, C S A; Rodrigues, A C; Paiva, F; Camargo, E P; Teixeira, M M G


    In this study, using a combined data set of SSU rDNA and gGAPDH gene sequences, we provide phylogenetic evidence that supports clustering of crocodilian trypanosomes from the Brazilian Caiman yacare (Alligatoridae) and Trypanosoma grayi, a species that circulates between African crocodiles (Crocodilydae) and tsetse flies. In a survey of trypanosomes in Caiman yacare from the Brazilian Pantanal, the prevalence of trypanosome infection was 35% as determined by microhaematocrit and haemoculture, and 9 cultures were obtained. The morphology of trypomastigotes from caiman blood and tissue imprints was compared with those described for other crocodilian trypanosomes. Differences in morphology and growth behaviour of caiman trypanosomes were corroborated by molecular polymorphism that revealed 2 genotypes. Eight isolates were ascribed to genotype Cay01 and 1 to genotype Cay02. Phylogenetic inferences based on concatenated SSU rDNA and gGAPDH sequences showed that caiman isolates are closely related to T. grayi, constituting a well-supported monophyletic assemblage (clade T. grayi). Divergence time estimates based on clade composition, and biogeographical and geological events were used to discuss the relationships between the evolutionary histories of crocodilian trypanosomes and their hosts.

  15. HAD Oral History Project (United States)

    Holbrook, Jarita


    The Historical Astronomy Division is the recipient of an American Institute of Physics Neils Bohr Library Grant for Oral History. HAD has assembled a team of volunteers to conduct oral history interviews since May 2013. Each oral history interview varies in length between two and six hours. This presentation is an introduction to the HAD Oral History Project and the activities of the team during the first six months of the grant.

  16. Discussion in the Research on American History of Westward Development%美国西部开发史研究综述

    Institute of Scientific and Technical Information of China (English)

    王储; 蒋涛


    19世纪美国西部开发取得巨大成就,成为世界上对欠发达地区成功开发的典型。自上世纪90年代以来,我国学术界充分认识到研究美国西部开发史的现实意义,对该课题进行了卓有成效的探讨,取得了较为丰硕的成果,主要集中在美国西部开发中的土地政策、交通革命和城市化等领域。本文对这些成果加以综述,较为完整地描述了我国学术界对美国西部开发史的研究现状。%The western part of the United States has made a great progress in the development in 19th century known as "the westward expansion". This became an ideal model and was subsequ ently applied to the exploration of the undeveloped areas. Since the 1990s, scholars in China have increasingly recognized the international significance of the history of America~ development of the West. By the highly effective discussion of this study, scholars have a- chieved a lot which focus on the field of land policy, transportation revolution and urbanization under the development of western regions in America. In this paper, the author offers an deep review of these advancements. This is followed by a discussion of the current developments in the research of Chinese academics and their analysis of the American his- tory of westward development.

  17. American Museum of Natural History (United States)

    ... and Christmas. Accessibility Admissions & Ticketing Coat Check and Photography Dining Directions and Transportation Download Museum Map Plan ... Curriculum Collections Evaluation, Research, and Policy Master of Arts in Teaching Online Courses for Educators Urban Advantage ...

  18. Course Syllabus: American Environmental History. (United States)

    Koppes, Clayton R.


    Focuses on the intellectual and political forces that have influenced man's relationship with the environment. Discusses why the use of the environment has occurred as it has, and who benefited from these choices. Concludes with a look at global deforestation. Includes daily assignments and readings. (MVL)

  19. Integrating Geography into American History (United States)

    Thornton, Stephen J.


    Geography faces stiff curricular competition from the continuing emphasis of policy makers on the three R's and science. In many places, this competition seems to have squeezed out any systematic attention to geography or the other social studies, particularly in elementary school. What's more, it doesn't look like things are going to turn around…

  20. American History Brought to Life (United States)

    Teague, Joetta


    For the past twenty years, a major project for the author's eighth-grade art classes has been a group diorama with plaster figures. The group has to include two to four people participating in a sport or an occupation while showing some kind of action and interaction. Not too long ago, a couple of girls asked to depict the signing of the…

  1. Diagnosed but Not Defeated: The Experiences of African-American Males with Past Histories of Enrollment in Special Education Who Successfully Attend Community College (United States)

    Strickland-Dixon, Kennedi


    African-American males are disappearing at alarming rates before our eyes through racially driven practices that secure their position in the penal system and special education. Though many scholars in the field of education have highlighted alarming rates of incarceration and overrepresentation in special education for African-American males,…

  2. Biology and Life History of Atanycolus cappaerti (Hymenoptera: Braconidae), a North American Larval Parasitoid Attacking the Invasive Emerald Ash Borer (Coleoptera: Buprestidae) (United States)

    Atanycolus cappaerti Marsh and Strazanac is a native North American parasitoid that has been found to parasitize the emerald ash borer, Agrilus planipennis Fairmaire, a serious invasive pests of North American ash trees (Fraxinus spp.). To facilitate the development of potential augmentative biocon...

  3. Putting teachers-to-be in the field and the lab: Hands-on research at the American Museum of Natural History (United States)

    Nadeau, P. A.; Ebel, D. S.; Harlow, G. E.; Landman, N. H.; Pagnotta, A.; Sessa, J.; Shara, M.; Ustunisik, G. K.; Webster, J. D.; Blair, D.; Shumer, M.


    The American Museum of Natural History (AMNH) is halfway through a pilot program designed to prepare Earth Science teachers for grades 7-12 in high-needs schools in New York. The program was implemented to address a critical shortage of qualified Earth Science teachers throughout the state as well as to reach student populations that traditionally have limited science exposure and hands-on learning opportunities. This Master of Arts in Teaching is unique amongst teacher preparation programs, not only in that it is housed at a world-class research museum and places the teacher candidates in a year-long teaching residency, but also in that it accepts only students with a strong background in Earth Science via a degree in geology, meteorology, oceanography, astronomy, or a related discipline. Following a year of graduate courses in science and pedagogy, as well as teaching residencies, and only months before embarking on teaching career, candidates begin a seven-week science practicum. This exercise combines field and lab work under the tutelage of AMNH science curators and postdoctoral research fellows to provide experience with the scientific process, from field work and data collection to interpretation and public presentation of results. In the science practicum, teaching candidates begin by selecting one of four topics on which to focus their research: astrophysics, experimental petrology, mineralogy, or paleontology. An introduction to lab materials, techniques, and instrumentation is followed by two weeks in the field, both upstate and in New York City, where rocks of all types are encountered and discussed. Nights are devoted to astronomical observing and data collection to supplement the geology-oriented daytime sessions. Following the trips, candidates are back at AMNH analyzing data and samples in preparation for a short, scientific-style manuscript and presentation of results in an AGU-style talk. Three research groups have already discovered potentially

  4. Chemical evolution of star clusters


    van Loon, Jacco Th.


    I discuss the chemical evolution of star clusters, with emphasis on old globular clusters, in relation to their formation histories. Globular clusters clearly formed in a complex fashion, under markedly different conditions from any younger clusters presently known. Those special conditions must be linked to the early formation epoch of the Galaxy and must not have occurred since. While a link to the formation of globular clusters in dwarf galaxies has been suggested, present-day dwarf galaxi...

  5. On the American“Teaching American History Grant Program”and the New Trend on the Teacher Training%从“美国史教学资助计划”看美国教师培训新趋势

    Institute of Scientific and Technical Information of China (English)



    21世纪以来,美国教育改革的首要目标是提高教育质量和学生学习成绩。为此,美国政府从发展教师能力、改善教学质量和转变教育观念的角度加强了对教师的教育和培训力度。本文以《美国史教学资助计划》为例,对新世纪以来美国师资教育培训的特点和趋势进行考察。%The reform of American history education is deepening. Following the established National History Standards, new American Elementary and Secondary Education Act was established. The aim of the new Act referring to the history reform is to improve the quality of American history teaching and the stress of it is to train the teachers who teach American history, which is “Teaching American History Grant Program”. The goal of this article is to discuss the settings, content, and performance of the Program and to evaluate it. And sum up the reference to the history teaching reform of China.

  6. The susceptibility of Asian, European and North American Fraxinus species to the ash dieback pathogen Hymenoscyphus fraxineus reflects their phylogenetic history

    DEFF Research Database (Denmark)

    Nielsen, Lene R.; McKinney, Lea V.; Hietala, Ari M.;


    that there is species-specific variation in disease susceptibility among European and North American Fraxinus species, but a wider comparison at the genus level has been missing so far. We assessed disease symptoms and pathogen apothecium development in 17 Fraxinus species from Asia, Europe and North America exposed...... susceptibility where closely related Asian, European and North American species in section Fraxinus had relatively high levels of H. fraxineus DNA in the leaves and supported high production of apothecia. Leaves from some North American species also contained relatively high levels of H. fraxineus DNA, supported...

  7. A Chandra Study of the Rosette Star-Forming Complex. III. The NGC 2237 Cluster and the Region's Star Formation History

    CERN Document Server

    Wang, Junfeng; Townsley, Leisa K; Broos, Patrick S; Román-Zúñiga, Carlos G; Lada, Elizabeth; Garmire, Gordon


    We present Chandra X-ray images of the NGC 2237 young star cluster on the periphery of the Rosette Nebula. We detect 168 X-ray sources, 80% of which have counterparts in USNO, 2MASS, and deep FLAMINGOS images. These constitute the first census of the cluster members with 0.2<~M<~2 Msun. Star locations in near-infrared color-magnitude diagrams indicate a cluster age around 2 Myr with a visual extinction of 1cluster NGC 2244. We derive the K-band luminosity function and the X-ray luminosity function of the cluster, which indicate a population ~400-600 stars. The X-ray-selected sample shows a K-excess disk frequency of 13%. The young Class II counterparts are aligned in an arc ~3 pc long suggestive of a triggered formation process induced by the O stars in NGC 2244. The diskless Class III sources are more dispersed. Several X-ray emitting stars are located inside the molecular cloud and around gaseous pillars projecting from the cloud. These...

  8. Teaching American Indian Architecture. (United States)

    Winchell, Dick


    Reviews "Native American Architecture," by Nabokov and Easton, an encyclopedic work that examines technology, climate, social structure, economics, religion, and history in relation to house design and the "meaning" of space among tribes of nine regions. Describes this book's use in a college course on Native American architecture. (SV)

  9. The History, Characteristics and Enlightenment of American Liberal Arts Colleges%美国文理学院的历史与特点研究及其启示

    Institute of Scientific and Technical Information of China (English)



      美国文理学院是美国高等教育中别具特色的一个重要类型,历史悠久,经历多次时代的挑战。随着美国大学模式的确立,其从占据主导地位到面临生存危机,但由于坚守博雅教育理念等多方面因素而得以继续保留,并以优质而富有特色的本科教育在美国高等教育中占据一席之位。美国文理学院的发展历史和特点对我国优化高等教育结构、引导高校特色发展和凝练办学理念、促进顶尖创新人才培养上具有重要的借鉴意义。%Liberal arts colleges are an important and distinctive type in American higher education. With a long history, liberal arts colleges, used to be the dominant type in American higher education, have confronted with identity crisis, especially since university mode formed in America. Through insisting on liberal education and supplying the good-quality undergraduate education with distinctive features, liberal arts colleges still play an important role in American higher education. Therefore, the history and characteristics of American liberal arts colleges can be used for reference to higher education reforms in China.

  10. Life-history diversity and its importance to population stability and persistence of a migratory fish: steelhead in two large North American watersheds. (United States)

    Moore, Jonathan W; Yeakel, Justin D; Peard, Dean; Lough, Jeff; Beere, Mark


    Life-history strategies can buffer individuals and populations from environmental variability. For instance, it is possible that asynchronous dynamics among different life histories can stabilize populations through portfolio effects. Here, we examine life-history diversity and its importance to stability for an iconic migratory fish species. In particular, we examined steelhead (Oncorhynchus mykiss), an anadromous and iteroparous salmonid, in two large, relatively pristine, watersheds, the Skeena and Nass, in north-western British Columbia, Canada. We synthesized life-history information derived from scales collected from adult steelhead (N = 7227) in these watersheds across a decade. These migratory fishes expressed 36 different manifestations of the anadromous life-history strategy, with 16 different combinations of freshwater and marine ages, 7·6% of fish performing multiple spawning migrations, and up to a maximum of four spawning migrations per lifetime. Furthermore, in the Nass watershed, various life histories were differently prevalent through time - three different life histories were the most prevalent in a given year, and no life history ever represented more than 45% of the population. These asynchronous dynamics among life histories decreased the variability of numerical abundance and biomass of the aggregated population so that it was > 20% more stable than the stability of the weighted average of specific life histories: evidence of a substantial portfolio effect. Year of ocean entry was a key driver of dynamics; the median correlation coefficient of abundance of life histories that entered the ocean the same year was 2·5 times higher than the median pairwise coefficient of life histories that entered the ocean at different times. Simulations illustrated how different elements of life-history diversity contribute to stability and persistence of populations. This study provides evidence that life-history diversity can dampen fluctuations in

  11. The American Montessori Society, Inc. (United States)

    Donahue, Gilbert E.


    This article offers a brief history of the establishment of the American Montessori Society (AMS) and takes a closer look at its structure. The history of AMS has essentially been a search for standards and a search for community in its efforts to further the welfare of children in America. It has been an indigenous effort by American parents, and…

  12. Modern African, Asian, Latin American, and Middle Eastern Military History: A Bibliography of English-Language Books and Articles Published From 1960-2013 (United States)


    Blackburn, Kevin. “Recalling War Trauma of the Pacific War and the Japanese Occupation in the Oral History of Malaysia and Singapore.” The Oral...XXX 2 (Spring 2008): 83-107. Fitzgerald, John. “Warlords, Bullies , and State Building in Nationalist China: The Guangdong Cooperative Movement...During the Vietnam War.” The Journal of Military History LXX 1 (January 2006): 91-122. Hawkins, David C. “Britain and Malaysia -- Another View: Was

  13. "I Never Really Knew the History behind African American Language": Critical Language Pedagogy in an Advanced Placement English Language Arts Class (United States)

    Baker-Bell, April


    This article responds to two long-standing dilemmas that limit the effectiveness of language education for students who speak and write in African American Language (AAL): (1) the gap between theory and research on AAL and classroom practice, and (2) the need for critical language pedagogies. This article presents the effectiveness of a critical…

  14. Las historias de la narrativa hispanoamericana: Criterios, metodos y ausencias. (Histories of the Latin-American Narrative: Criteria, Methods, and Absences). (United States)

    Zavalo, Lauro

    This paper explains that materials on the teaching of Latin-American literature are sparse, even though most researchers in the field will dedicate much of their time to teaching. The paper adds that, in scholarly journals, little attention is given to teaching literature, and the topic is also absent from most academic congresses. The paper then…

  15. Post-Slavery? Post-Segregation? Post-Racial? A History of the Impact of Slavery, Segregation, and Racism on the Education of African Americans (United States)

    Span, Christopher M.


    This chapter details how slavery, segregation, and racism impacted the educational experiences of African Americans from the colonial era to the present. It argues that America has yet to be a truly post-slavery and post-segregation society, let alone a post-racial society.

  16. Massive star clusters in galaxies

    CERN Document Server

    Harris, William E


    The ensemble of all star clusters in a galaxy constitutes its star cluster system. In this review, the focus of the discussion is on the ability of star clusters, particularly the systems of old massive globular clusters (GCSs), to mark the early evolutionary history of galaxies. I review current themes and key findings in GCS research, and highlight some of the outstanding questions that are emerging from recent work.

  17. Chemical Heterogeneity of a Large Cluster IDP: Clues to its Formation History Using X-ray Fluorescence Mapping and XANES Spectroscopy (United States)

    Wirick, S.; Flynn, G. J.; Sutton, S.; Zolensky, M. E.


    Chondritic porous IDPs may be among the most primitive objects found in our solar system [1]. They consist of many micron to submicron minerals, glasses and carbonaceous matter [2,3,4,5,6,7] with > 10(exp 4) grains in a 10 micron cluster [8]. Speculation on the environment where these fine grained, porous IDPs formed varies with possible sources being presolar dusty plasma clouds, protostellar condensation, solar asteroids or comets [4,6,9]. Also, fine grained dust forms in our solar system today [10,11]. Isotopic anomalies in some particles in IDPs suggest an interstellar source[4,7,12]. IDPs contain relic particles left from the dusty plasma that existed before the protostellar disk formed and other grains in the IDPs formed later after the cold dense nebula cloud collapsed to form our protostar and other grains formed more recently. Fe and CR XANES spectroscopy is used here to investigate the oxygen environment in a large (>50 10 micron or larger sub-units) IDP. Conclusions: Analyzing large (>50 10 micron or larger sub-units) CP IDPs gives one a view on the environments where these fine dust grains formed which is different from that found by only analyzing the small, 10 micron IDPs. As with cluster IDP L2008#5 [3], L2009R2 cluster #13 appears to be an aggregate of grains that sample a diversity of solar and perhaps presolar environments. Sub-micron, grain by grain measurement of trace element contents and elemental oxidation states determined by XANES spectroscopy offers the possibility of understanding the environments in which these grains formed when compared to standard spectra. By comparing thermodynamic modeling of condensates with analytical data an understanding of transport mechanisms operating in the early solar system may be attained.

  18. 从探索自主性发展道路的角度解读拉美历史--评介林被甸、董经胜著《拉丁美洲史》%Interpretation of Latin American History from the Perspective of Exploring the Independent Path of Development:Review of A History of Latin American by Lin Beidian & Dong Jingsheng

    Institute of Scientific and Technical Information of China (English)



    把宏观透视与微观分析相结合,着力介绍《拉丁美洲史》的主要特色,以现代部分作为评介重点,如该书作者对拉美国家寻求自主性发展道路,拉美国家发展道路的特殊性,拉美国家民众主义、威权主义等的分析和论述,进而说明该书“超越前人旧作,大有创意”,“代表了中国拉美史研究的新水平”。%Combining macro perspective with micro analysis, the pa-per focuses on introducing the features and the modern part of the Latin American History. For example, the authors’ discussion of Latin American countries which sought independent path of development, the particularity of the path of national development in Latin America, the national popu-lism and authoritarianism of Latin America. Therefore the book can be seen as“beyond the previous, very creative,” and“represents a new level of Latin American history”.

  19. Genomic Insights into the Ancestry and Demographic History of South America (United States)

    Homburger, Julian R.; Moreno-Estrada, Andrés; Gignoux, Christopher R.; Nelson, Dominic; Sanchez, Elena; Ortiz-Tello, Patricia; Pons-Estel, Bernardo A.; Acevedo-Vasquez, Eduardo; Miranda, Pedro; Langefeld, Carl D.; Gravel, Simon; Alarcón-Riquelme, Marta E.; Bustamante, Carlos D.


    South America has a complex demographic history shaped by multiple migration and admixture events in pre- and post-colonial times. Settled over 14,000 years ago by Native Americans, South America has experienced migrations of European and African individuals, similar to other regions in the Americas. However, the timing and magnitude of these events resulted in markedly different patterns of admixture throughout Latin America. We use genome-wide SNP data for 437 admixed individuals from 5 countries (Colombia, Ecuador, Peru, Chile, and Argentina) to explore the population structure and demographic history of South American Latinos. We combined these data with population reference panels from Africa, Asia, Europe and the Americas to perform global ancestry analysis and infer the subcontinental origin of the European and Native American ancestry components of the admixed individuals. By applying ancestry-specific PCA analyses we find that most of the European ancestry in South American Latinos is from the Iberian Peninsula; however, many individuals trace their ancestry back to Italy, especially within Argentina. We find a strong gradient in the Native American ancestry component of South American Latinos associated with country of origin and the geography of local indigenous populations. For example, Native American genomic segments in Peruvians show greater affinities with Andean indigenous peoples like Quechua and Aymara, whereas Native American haplotypes from Colombians tend to cluster with Amazonian and coastal tribes from northern South America. Using ancestry tract length analysis we modeled post-colonial South American migration history as the youngest in Latin America during European colonization (9–14 generations ago), with an additional strong pulse of European migration occurring between 3 and 9 generations ago. These genetic footprints can impact our understanding of population-level differences in biomedical traits and, thus, inform future medical

  20. Genomic Insights into the Ancestry and Demographic History of South America. (United States)

    Homburger, Julian R; Moreno-Estrada, Andrés; Gignoux, Christopher R; Nelson, Dominic; Sanchez, Elena; Ortiz-Tello, Patricia; Pons-Estel, Bernardo A; Acevedo-Vasquez, Eduardo; Miranda, Pedro; Langefeld, Carl D; Gravel, Simon; Alarcón-Riquelme, Marta E; Bustamante, Carlos D


    South America has a complex demographic history shaped by multiple migration and admixture events in pre- and post-colonial times. Settled over 14,000 years ago by Native Americans, South America has experienced migrations of European and African individuals, similar to other regions in the Americas. However, the timing and magnitude of these events resulted in markedly different patterns of admixture throughout Latin America. We use genome-wide SNP data for 437 admixed individuals from 5 countries (Colombia, Ecuador, Peru, Chile, and Argentina) to explore the population structure and demographic history of South American Latinos. We combined these data with population reference panels from Africa, Asia, Europe and the Americas to perform global ancestry analysis and infer the subcontinental origin of the European and Native American ancestry components of the admixed individuals. By applying ancestry-specific PCA analyses we find that most of the European ancestry in South American Latinos is from the Iberian Peninsula; however, many individuals trace their ancestry back to Italy, especially within Argentina. We find a strong gradient in the Native American ancestry component of South American Latinos associated with country of origin and the geography of local indigenous populations. For example, Native American genomic segments in Peruvians show greater affinities with Andean indigenous peoples like Quechua and Aymara, whereas Native American haplotypes from Colombians tend to cluster with Amazonian and coastal tribes from northern South America. Using ancestry tract length analysis we modeled post-colonial South American migration history as the youngest in Latin America during European colonization (9-14 generations ago), with an additional strong pulse of European migration occurring between 3 and 9 generations ago. These genetic footprints can impact our understanding of population-level differences in biomedical traits and, thus, inform future medical

  1. Genomic Insights into the Ancestry and Demographic History of South America.

    Directory of Open Access Journals (Sweden)

    Julian R Homburger


    Full Text Available South America has a complex demographic history shaped by multiple migration and admixture events in pre- and post-colonial times. Settled over 14,000 years ago by Native Americans, South America has experienced migrations of European and African individuals, similar to other regions in the Americas. However, the timing and magnitude of these events resulted in markedly different patterns of admixture throughout Latin America. We use genome-wide SNP data for 437 admixed individuals from 5 countries (Colombia, Ecuador, Peru, Chile, and Argentina to explore the population structure and demographic history of South American Latinos. We combined these data with population reference panels from Africa, Asia, Europe and the Americas to perform global ancestry analysis and infer the subcontinental origin of the European and Native American ancestry components of the admixed individuals. By applying ancestry-specific PCA analyses we find that most of the European ancestry in South American Latinos is from the Iberian Peninsula; however, many individuals trace their ancestry back to Italy, especially within Argentina. We find a strong gradient in the Native American ancestry component of South American Latinos associated with country of origin and the geography of local indigenous populations. For example, Native American genomic segments in Peruvians show greater affinities with Andean indigenous peoples like Quechua and Aymara, whereas Native American haplotypes from Colombians tend to cluster with Amazonian and coastal tribes from northern South America. Using ancestry tract length analysis we modeled post-colonial South American migration history as the youngest in Latin America during European colonization (9-14 generations ago, with an additional strong pulse of European migration occurring between 3 and 9 generations ago. These genetic footprints can impact our understanding of population-level differences in biomedical traits and, thus, inform

  2. Osteopathic medicine and the practice of dermatology: history and current status. An overview of the American Osteopathic College of Dermatology, an affiliate specialty college of the American Osteopathic Association. (United States)

    Austin, Erik; Way, Bill V; Lustig, Chava; Green, Jason; Manlio, Christopher; Broomer, Amy; Persichetti, Greg; Akhtar, Asfa; Elias, Merrick; Favreau, Tracy; Skopit, Stanley


    As the unified training body for osteopathic physicians specializing in dermatology, the American Osteopathic College of Dermatology (AOCD) sponsors 18 dermatology residency programs that integrate academic training (focusing on the core of basic medical sciences) with clinical instruction (emphasizing specialized diagnostic and laboratory techniques and the high-level performance of all dermatologic and surgical procedures) to engender the ability to provide superior, specialized dermatologic care. The board of directors of the American Academy of Dermatology (AAD) recommended passage of a bylaws amendment establishing a category of osteopathic fellow for those osteopathic physicians who are certified by the American Osteopathic Board of Dermatology; however, the AAD membership failed to adopt the amendment by the required two-thirds majority. Constitutional bylaws of both societies stress the importance of the goal of unification and representation of the specialty of dermatology. Continued rapprochement appears to be in the best interest of the AAD and AOCD and may well enhance our efforts to deal with the challenges that face dermatology and medical practice in the 21st century.

  3. Lifetime history of traumatic events in a young adult Mexican American sample: Relation to substance dependence, affective disorder, acculturation stress, and PTSD. (United States)

    Ehlers, Cindy L; Kim, Corinne; Gilder, David A; Stouffer, Gina M; Caetano, Raul; Yehuda, Rachel


    Mexican Americans comprise one of the most rapidly growing populations in the United States, and within this population, trauma and post-traumatic stress disorder (PTSD) are associated with physical and mental health problems. Therefore, efforts to delineate factors that may uniquely contribute to increased likelihood of trauma, PTSD, and substance use disorders over the lifetime in Mexican Americans are important to address health disparities and to develop treatment and prevention programs. Six hundred fourteen young adults (age 18-30 yrs) of Mexican American heritage, largely second generation, were recruited from the community and assessed with the Semi-Structured Assessment for the Genetics of Alcoholism and an acculturation stress scale. More males (51.2%) reported experiencing traumas than females (41.1%), however, a larger proportion of females received a PTSD diagnosis (15%) than males (8%). Alcohol dependence and affective disorders, but not anxiety disorders, antisocial disorders, nicotine, marijuana, or stimulant dependence, were significantly comorbid with PTSD. Endorsing higher levels of acculturation stress was also significantly associated with both trauma exposure and a diagnosis of PTSD. Logistic regression revealed that female gender, having an affective disorder, alcohol dependence, higher levels of acculturation stress, and lower levels of education were all predictors of PTSD status. Additionally, alcohol dependence generally occurred after the PTSD diagnosis in early adulthood in this high-risk population. These studies suggest that treatment and prevention efforts should particularly focus on young adult second generation Mexican American women with higher levels of acculturation stress, who may be at higher risk for PTSD, affective disorder, and alcohol dependence following trauma exposure.

  4. Calvin M. Woodward and the Beginnings of the Project Method of Instruction. A Chapter from the American History of Education, 1876-1900. (United States)

    Knoll, Michael


    Describes the origin of the project method and questions the educational and political intentions Calvin M. Woodward had when he introduced manual training and the project idea. Examines the project method's history and rise to significance when, around 1900, it became the sole means of manual education. (GEA)

  5. Trends And Dilemmas Of American Anthropology: The History Of The Institute Of Social Anthropology At The Smithsonian Institution And Its Presence In Brazil [tendências E Dilemas Da Antropologia Norte-americana: Sobre A História Do Instituto De Antropologia Social Da Smithsonian Institution E Sua Presença No Brasil


    de Figueiredo R.E.D.


    This paper is about the history of Smithsonian Institution's Institute of Social Anthropology, which was an agency in charge of the cooperation involving North-American researchers and Latin-American institutions in the social sciences, between 1943 and 1952. Taking into account the geopolitical context - marked by the war efforts, Good Neighborhood Policy and Technical Assistance and Development Programs - the Institute's trajectory expresses the interfaces between science and politics and a...

  6. Open Clusters and OB Associations: a Review

    Directory of Open Access Journals (Sweden)

    Anthony G. A. Brown


    Full Text Available In this review on open clusters and OB associations I discuss some recent developments to which Latin American astronomers have contributed. Subsequently, results from the Hipparcos mission concerning OB associations, the Hyades and other nearby open clusters will be discussed. I end with a brief discussion of current theories of star cluster formation and prospects for future research.

  7. “崛起美国”数字图书馆--记录美国成长的足迹%Making of America Digital Library--Documenting American Social History

    Institute of Scientific and Technical Information of China (English)

    刘燕权; 田硕


    “崛起美国”数字图书馆(Making of America Digital Library, MOA)是一个收集美国内战前到重建时期(1850-1877)社会历史一手资料的数字图书馆项目。馆藏资源涵盖教育、心理、社会、宗教、科学技术和美国历史等多个学科领域,是通过数字技术保存的有关美国基础设施发展方面重要原始资料的代表性项目。本文对该图书馆的建设及现状进行了综合性评析,包括项目概述、资源组织、技术特征、服务特点等,并给出评价与建议。%Making of America (MOA) is a digital library of primary sources in American social history from the antebel um period through reconstruction. The col ection is particularly strong in the subject areas of education, psychology, American history, sociology, religion, and science and technology. It represents“a major col aborative endeavor to preserve and make accessible through digital technology a significant body of primary sources related to development of the U.S. infrastructure.”The paper made an extended review on the digital library's construction and current development, including project background, resources organization, technological structures and service features. Comments and suggestion were also given.

  8. Line Strengths in Early-Type Cluster Galaxies at z=0.33: Implications for alpha/Fe, Nitrogen and the Histories of E/S0s

    CERN Document Server

    Kelson, D D; Franx, M; Van Dokkum, P G; Kelson, Daniel D.; Illingworth, Garth D.; Franx, Marijn


    [Heavily Abbreviated] In this paper we analyze previously published spectra with high signal-to-noise ratios of E/S0 galaxies in the rich cluster CL1358+62 at z=0.33, and introduce techniques for fitting stellar population models to the data. Here we focus on the 19 E and S0 galaxies with an homogeneous set of eight blue Lick indices. We explore the galaxy properties using six-parameter stellar population models from the literature, and describe an approach for fitting the models differentially, such that the largest systematic errors are avoided. We find: (1) no differences between the stellar population parameters of Es and S0s, at fixed sigma; (2) the stars in the Es and S0s are uniformly old, consistent with previously published results using M/L ratios; (3) a significant correlation of [Z/H] with sigma, in a manner consistent with the observed B-V colors of the galaxies; (4) no significant correlation of [alpha/Fe] with sigma; and (5) a significant anti-correlation of [alpha/N] with [Z/H], which we inter...

  9. Posttraumatic stress disorder symptoms among low-income, African American women with a history of intimate partner violence and suicidal behaviors: self-esteem, social support, and religious coping. (United States)

    Bradley, Rebekah; Schwartz, Ann C; Kaslow, Nadine J


    There is a dearth of research on risk/protective factors for posttraumatic stress disorder (PTSD) among low-income African American women with a history of intimate partner violence (IPV), presenting for suicidal behavior or routine medical care in a large, urban hospital. We examined self-esteem, social support, and religious coping as mediators between experiences of child maltreatment (CM) and IPV and symptoms of PTSD in a sample (N = 134) of low-income African American women. Instruments used included the Index of Spouse Abuse, the Childhood Trauma Questionnaire, the Taylor Self-Esteem Inventory, the Multidimensional Profile of Social Support, the Brief Religious Coping Activities Scale, and the Davidson Trauma Scale. Both CM and IPV related positively to PTSD symptoms. Risk and resilience individual difference factors accounted for 18% of the variance in PTSD symptoms over and above IPV and CM, with self-esteem and negative religious coping making unique contributions. Both variables mediated the abuse-PTSD symptom link. In addition, we tested an alternate model in which PTSD symptoms mediated the relationship between abuse and both self-esteem and negative religious coping.

  10. Star Clusters within FIRE (United States)

    Perez, Adrianna; Moreno, Jorge; Naiman, Jill; Ramirez-Ruiz, Enrico; Hopkins, Philip F.


    In this work, we analyze the environments surrounding star clusters of simulated merging galaxies. Our framework employs Feedback In Realistic Environments (FIRE) model (Hopkins et al., 2014). The FIRE project is a high resolution cosmological simulation that resolves star forming regions and incorporates stellar feedback in a physically realistic way. The project focuses on analyzing the properties of the star clusters formed in merging galaxies. The locations of these star clusters are identified with, a publicly available dendrogram algorithm. Once star cluster properties are extracted, they will be used to create a sub-grid (smaller than the resolution scale of FIRE) of gas confinement in these clusters. Then, we can examine how the star clusters interact with these available gas reservoirs (either by accreting this mass or blowing it out via feedback), which will determine many properties of the cluster (star formation history, compact object accretion, etc). These simulations will further our understanding of star formation within stellar clusters during galaxy evolution. In the future, we aim to enhance sub-grid prescriptions for feedback specific to processes within star clusters; such as, interaction with stellar winds and gas accretion onto black holes and neutron stars.

  11. Runaways in History (United States)

    Lipschutz, Mark R.


    Although running away is a glorified part of American folk tradition, today's runaway runs afoul of a host of laws, including those which make the act itself illegal. This article examines the history of the social and legal status of youth and why they run away. (Author)

  12. Cluster headache (United States)

    Histamine headache; Headache - histamine; Migrainous neuralgia; Headache - cluster; Horton's headache; Vascular headache - cluster ... A cluster headache begins as a severe, sudden headache. The headache commonly strikes 2 to 3 hours after you fall ...

  13. Cluster Forests

    CERN Document Server

    Yan, Donghui; Jordan, Michael I


    Inspired by Random Forests (RF) in the context of classification, we propose a new clustering ensemble method---Cluster Forests (CF). Geometrically, CF randomly probes a high-dimensional data cloud to obtain "good local clusterings" and then aggregates via spectral clustering to obtain cluster assignments for the whole dataset. The search for good local clusterings is guided by a cluster quality measure $\\kappa$. CF progressively improves each local clustering in a fashion that resembles the tree growth in RF. Empirical studies on several real-world datasets under two different performance metrics show that CF compares favorably to its competitors. Theoretical analysis shows that the $\\kappa$ criterion is shown to grow each local clustering in a desirable way---it is "noise-resistant." A closed-form expression is obtained for the mis-clustering rate of spectral clustering under a perturbation model, which yields new insights into some aspects of spectral clustering.

  14. Star Clusters


    Gieles, M.


    Star clusters are observed in almost every galaxy. In this thesis we address several fundamental problems concerning the formation, evolution and disruption of star clusters. From observations of (young) star clusters in the interacting galaxy M51, we found that clusters are formed in complexes of stars and star clusters. These complexes share similar properties with giant molecular clouds, from which they are formed. Many (70%) of the young clusters will not survive the fist 10 Myr, due to t...

  15. Chemical evolution of star clusters

    CERN Document Server

    van Loon, Jacco Th


    I discuss the chemical evolution of star clusters, with emphasis on old globular clusters, in relation to their formation histories. Globular clusters clearly formed in a complex fashion, under markedly different conditions from any younger clusters presently known. Those special conditions must be linked to the early formation epoch of the Galaxy and must not have occurred since. While a link to the formation of globular clusters in dwarf galaxies has been suggested, present-day dwarf galaxies are not representative of the gravitational potential wells within which the globular clusters formed. Instead, a formation deep within the proto-Galaxy or within dark-matter minihaloes might be favoured. Not all globular clusters may have formed and evolved similarly. In particular, we may need to distinguish Galactic halo from Galactic bulge clusters.

  16. The Violence Factors in American Culture

    Institute of Scientific and Technical Information of China (English)



    Violence symbolized the dark side of America culture. The theme of this article is to explore the causes of the violence factors in American culture. American violence exists as a result of a complex network of elements from American history, American value, various social factors such as economic inequality, racial discrimination, mass media, wide spread of guns as well as drug abuse. Besides, the governmental policy plays an essential role in American violence to some extent.

  17. History Microcomputer Games: Update 2. (United States)

    Sargent, James E.


    Provides full narrative reviews of B-1 Nuclear Bomber (Avalon, 1982); American History Adventure (Social Science Microcomputer Review Software, 1985); Government Simulations (Prentice-Hall, 1985); and The Great War, FDR and the New Deal, and Hitler's War, all from New Worlds Software, 1985. Lists additional information on five other history and…

  18. Black History, Inc! Investigating the Production of Black History through Walmart's Corporate Web Site (United States)

    King, LaGarrett J.; Brown, Anthony L.


    Social and public sites are becoming a popular medium for intellectual consumption of Black history. Given the educational climate in which many students' exposure to Black history may come from outside of schools, the authors examine how Walmart's Black History Month Web site produced simplistic and safe narratives about African American history.

  19. A Consumer's Guide to High School History Textbooks (United States)

    Ravitch, Diane


    This document reviews a dozen history textbooks. The following American History textbooks are reviewed: (1) Joyce Appleby, Alan Brinkley, and James M. McPherson, The American Journey: Building a Nation (Glencoe, 2003), and Joyce Appleby, Alan Brinkley, Albert S. Broussard, James M. McPherson, and Donald A. Ritchie, The American Republic Since 1877…

  20. Saga of American Sport. (United States)

    Lucas, John A.; Smith, Ronald A.

    This history of sports and athletic activities in America covers a time span from the close of the sixteenth century to the present time. It is divided into three major sections. The first, "Colonial and Early American Sport," narrates the early moral and ethical attitudes of the Puritans and follows the changes in attitudes and introduction of…

  1. Cultural Vignette: Vietnamese Americans. (United States)

    Boyer, Mary Ellen; And Others

    This booklet, developed as part of a multicultural research project conducted in the San Diego Community College District, presents the findings of a nine-member research team on various aspects of the history and culture of Vietnamese Americans. The areas covered are: (1) the Vietnamese as immigrant, which includes a discussion of the trauma and…

  2. Open clusters and the galactic disk

    CERN Document Server

    Roeser, Siegfried; Piskunov, Anatoly E; Schilbach, Elena; Scholz, Ralf-Dieter; Zinnecker, Hans


    It is textbook knowledge that open clusters are conspicuous members of the thin disk of our Galaxy, but their role as contributors to the stellar population of the disk was regarded as minor. Starting from a homogenous stellar sky survey, the ASCC-2.5, we revisited the population of open clusters in the solar neighbourhood from scratch. In the course of this enterprise we detected 130 formerly unknown open clusters, constructed volume- and magnitude-limited samples of clusters, re-determined distances, motions, sizes, ages, luminosities and masses of 650 open clusters. We derived the present-day luminosity and mass functions of open clusters (not the stellar mass function in open clusters), the cluster initial mass function CIMF and the formation rate of open clusters. We find that open clusters contributed around 40 percent to the stellar content of the disk during the history of our Galaxy. Hence, open clusters are important building blocks of the Galactic disk.

  3. A History of Ashes: An 80 Year Comparative Portrait of Smoking Initiation in American Indians and Non-Hispanic Whites—the Strong Heart Study

    Directory of Open Access Journals (Sweden)

    Jack Goldberg


    Full Text Available The consequences of starting smoking by age 18 are significant. Early smoking initiation is associated with higher tobacco dependence, increased difficulty in smoking cessation and more negative health outcomes. The purpose of this study is to examine how closely smoking initiation in a well-defined population of American Indians (AI resembles a group of Non-Hispanic white (NHW populations born over an 80 year period. We obtained data on age of smoking initiation among 7,073 AIs who were members of 13 tribes in Arizona, Oklahoma and North and South Dakota from the 1988 Strong Heart Study (SHS and the 2001 Strong Heart Family Study (SHFS and 19,747 NHW participants in the 2003 National Health Interview Survey. The participants were born as early as 1904 and as late as 1985. We classified participants according to birth cohort by decade, sex, and for AIs, according to location. We estimated the cumulative incidence of smoking initiation by age 18 in each sex and birth cohort group in both AIs and NHWs and used Cox regression to estimate hazard ratios for the association of birth cohort, sex and region with the age at smoking initiation. We found that the cumulative incidence of smoking initiation by age 18 was higher in males than females in all SHS regions and in NHWs (p < 0.001. Our results show regional variation of age of initiation significant in the SHS (p < 0.001. Our data showed that not all AIs (in this sample showed similar trends toward increased earlier smoking. For instance, Oklahoma SHS male participants born in the 1980s initiated smoking before age 18 less often than those born before 1920 by a ratio of 0.7. The results showed significant variation in age of initiation across sex, birth cohort, and location. Our preliminary analyses suggest that AI smoking trends are not uniform across region or gender but are likely shaped by local context. If tobacco prevention and control programs depend in part on addressing the origin of AI

  4. Support for Native Americans with Developmental Disabilities. (United States)

    Goodman, Wylie; Rife, Christine

    This report addresses the high incidence of fetal alcohol syndrome (FAS) and fetal alcohol effects (FAE) among Native Americans and suggests that there is a lack of comprehensive effort to provide outreach services to the Native American population in Illinois. The report begins with an overview of American Indian history and the migration of…

  5. A Preliminary Study on the Academic Research Concepts of American Psychological History School%美国心理史学学派学术研究理念初探

    Institute of Scientific and Technical Information of China (English)

    王凯; 张晓武


    American psychological history school is an important genre of the West new historiography, the school has formed a relatively mature concepts of academic research in the process of long-term development:Pay attention to the subject blend;Put the historical figures and their psychological activities as the main object of study;Research related to the history of the problem based on the historical figures and their psychological activities. But, the concept of academic research of this school has some defects which mainly displays in the limits of the applicability of the modern psychology theory in the research. And it also has some limits of the historical data to identify.%美国心理史学学派是西方新史学的一个重要流派,这一学派在长期的发展过程中形成了一套相对成熟的学术研究理念:注重学科间的交叉、融合;以历史上的人及其心理活动为主要研究对象;以历史上的人的心理活动为依据来探究与之相关的历史问题。但是,这一学派的学术研究理念也存在一些缺陷,主要表现在其依靠的现代心理学理论在研究中的适用性的局限以及在史料鉴别方面的局限。

  6. Stellar populations in star clusters (United States)

    Li, Cheng-Yuan; de Grijs, Richard; Deng, Li-Cai


    Stellar populations contain the most important information about star cluster formation and evolution. Until several decades ago, star clusters were believed to be ideal laboratories for studies of simple stellar populations (SSPs). However, discoveries of multiple stellar populations in Galactic globular clusters have expanded our view on stellar populations in star clusters. They have simultaneously generated a number of controversies, particularly as to whether young star clusters may have the same origin as old globular clusters. In addition, extensive studies have revealed that the SSP scenario does not seem to hold for some intermediate-age and young star clusters either, thus making the origin of multiple stellar populations in star clusters even more complicated. Stellar population anomalies in numerous star clusters are well-documented, implying that the notion of star clusters as true SSPs faces serious challenges. In this review, we focus on stellar populations in massive clusters with different ages. We present the history and progress of research in this active field, as well as some of the most recent improvements, including observational results and scenarios that have been proposed to explain the observations. Although our current ability to determine the origin of multiple stellar populations in star clusters is unsatisfactory, we propose a number of promising projects that may contribute to a significantly improved understanding of this subject.

  7. The American Way of Warfare (United States)


    Military Experience: History and Learning,” The Journal of Interdisciplinary History, Vol. 1, No. 2 (Winter, 1971), 208. 19 Jerome S. Bruner , Jacqueline... Bruner , Jerome S., Goodnow, Jacqueline J, and Austin, George A. A Study of Thinking. New York: Wiley, 1956. Bruscino, Thomas A, “Our American

  8. Leishmaniose tegumentar americana: histórico, epidemiologia e perspectivas de controle American cutaneous leishmaniasis: history, epidemiology and prospects for control

    Directory of Open Access Journals (Sweden)

    Sergio de Almeida Basano


    Full Text Available A Leishmaniose Tegumentar Americana (LTA é uma doença causada por protozoários do gênero Leishmania, transmitida ao homem pela picada de mosquitos flebotomíneos (Ordem Diptera; Família Psychodidae; Sub-Família Phlebotominae. No Brasil existem atualmente 6 espécies de Leishmania responsáveis pela doença humana, e mais de 200 espécies de flebotomíneos implicados em sua transmissão. Trata-se de uma doença que acompanha o homem desde tempos remotos e que tem apresentado, nos últimos 20 anos, um aumento do número de casos e ampliação de sua ocorrência geográfica, sendo encontrada atualmente em todos os Estados brasileiros, sob diferentes perfis epidemiológicos. Estima-se que, entre 1985 e 2003, ocorreram 523.975 casos autóctones, a sua maior parte nas regiões Nordeste e Norte do Brasil. Neste estudo, são discutidos aspectos relacionados ao tratamento e ao controle dessa doença, assim como também as dificuldades para a implementação dessas medidas. São apontadas alternativas que passam pela estruturação dos serviços de saúde, com respeito ao diagnóstico, no desenvolvimento de drogas de aplicação tópica ou por via oral, no desenvolvimento de vacinas, no controle diferenciado de vetores e no aprofundamento de estudos relacionados à biologia celular do parasita.American Cutaneous Leishmaniasis (ACL is an infectious disease transmitted by the bite of phlebotomines mosquitos (Order Diptera: Family Psychodidae: Sub-Family Phlebotominae and caused by protozoa from the genus Leishmania (ROSS 1903. In Brazil, there are six different species of Leishmania and more than 200 different species of phlebotomines. It's a disease that has been afflicting human beings for many centuries, and in Brazil, in the past two decades, there has been an important increase in the number of cases and also in its geographical distribution. Presently, ACL cases are registered in all Brazilian states under three different epidemiological

  9. The Studies of American and British Political Parties' System and Revelations from the Perspective of History and Culture%从历史和文化的视角看英美政党制度

    Institute of Scientific and Technical Information of China (English)



    政党不是从来就有的,它是一定历史阶段的产物,同时,政党制度受到一定社会的文化的影响而打上了深深的文化烙印,两党制是西方社会最典型的政党制度,而两党制最典型的代表又是英美两国,因此,首先从历史和文化的角度对英美政党制度进行研究,不仅有利于了解英美政党制度的起源和发展,而且还有助于了解一个国家选择什么样的政党制度是由以文化和历史为基础的政治生态环境决定的。然后通过从历史和文化的视角对比英美政党制度与我国现在的政党制度,指出我国现在的政党制度不仅是由我国历史条件决定的,而且更是由我国传统文化中的文化基因决定的,这对坚持我国现在的政党制度,培养理论自信和制度自信以及对我国政党制度的建设具有深远和重要的意义。%The political party is not always there, it is the product of a certain historic stage. At the same time, political party system is influenced by certain social culture with deep cultural imprint. The two-party system is the most typical western society's political party system, and the most typical representatives of the two-party system are Britain and America. So taking an analysis of British and American political party system from the perspective of history and culture is not only beneficial to understand the origin and development of American and British political party systems, but also contributes to the understanding that a country's political system is mainly determined by the political environment on the basis of the culture and history of the country. By taking a contrast and comparison between British and American political party systems and our political party system, we can make a conclusion that our current political party system is not only decided by the historic conditions of our country, but also by the cultural gene of Chinese traditional culture

  10. Meaningful Clusters

    Energy Technology Data Exchange (ETDEWEB)

    Sanfilippo, Antonio P.; Calapristi, Augustin J.; Crow, Vernon L.; Hetzler, Elizabeth G.; Turner, Alan E.


    We present an approach to the disambiguation of cluster labels that capitalizes on the notion of semantic similarity to assign WordNet senses to cluster labels. The approach provides interesting insights on how document clustering can provide the basis for developing a novel approach to word sense disambiguation.

  11. The Assembly of Galaxy Clusters

    Energy Technology Data Exchange (ETDEWEB)

    Berrier, Joel C.; Stewart, Kyle R.; Bullock, James S.; Purcell, Chris W.; Barton, Elizabeth J.; Wechsler, Risa H.


    We study the formation of fifty-three galaxy cluster-size dark matter halos (M = 10{sup 14.0-14.76} M{sub {circle_dot}}) formed within a pair of cosmological {Lambda}CDM N-body simulations, and track the accretion histories of cluster subhalos with masses large enough to host {approx} 0.1L{sub *} galaxies. By associating subhalos with cluster galaxies, we find the majority of galaxies in clusters experience no 'pre-processing' in the group environment prior to their accretion into the cluster. On average, {approx} 70% of cluster galaxies fall into the cluster potential directly from the field, with no luminous companions in their host halos at the time of accretion; and less than {approx} 12% are accreted as members of groups with five or more galaxies. Moreover, we find that cluster galaxies are significantly less likely to have experienced a merger in the recent past ({approx}< 6 Gyr) than a field halo of the same mass. These results suggest that local, cluster processes like ram-pressure stripping, galaxy harassment, or strangulation play the dominant role in explaining the difference between cluster and field populations at a fixed stellar mass; and that pre-evolution or past merging in the group environment is of secondary importance for setting cluster galaxy properties for most clusters. The accretion times for z = 0 cluster members are quite extended, with {approx} 20% incorporated into the cluster halo more than 7 Gyr ago and {approx} 20% within the last 2 Gyr. By comparing the observed morphological fractions in cluster and field populations, we estimate an approximate time-scale for late-type to early-type transformation within the cluster environment to be {approx} 6 Gyr.

  12. Garnet polycrystals and the significance of clustered crystallization (United States)

    Whitney, Donna L.; Seaton, Nicholas C. A.


    Polycrystalline garnets are common in metamorphic rocks and may form as a result of close spacing of nuclei (if clustering is early) or impingement of larger grains (if clustering occurs later in the growth history). The timing of clustering relative to garnet growth is relevant to understanding the formation and evolution of porphyroblasts and evaluating the significance (if any) of clustering. Electron backscattered diffraction (EBSD) analysis of garnet-bearing metamorphic rocks reveals the presence of polycrystalline garnet in nine localities examined in this study: the northern Appalachians (Vermont, Maine, New York, USA); North American Cordillera (North Cascades Range, Washington; Snake Range, Nevada, USA); western Rocky Mountains (British Columbia, Canada); southern Menderes Massif (Turkey); Santander Massif (Colombia); and the Sanandaj-Sirjan zone (Hamadan, Iran). In some samples, polycrystals comprise ~20-30% of garnets analyzed, and chemical and textural evidence suggests that early coalescence of garnet polycrystals is common. Some early-coalescing polycrystals exhibit growth zoning that is concentric about the geometric center of the polycrystal. In thin section, these garnets may be undetectable as polycrystals based on morphology or zoning. In some polycrystals, zoning is unrelated to the location of internal grain boundaries; in others, Fe-Mn-Mg zoning has a different pattern than that of Ca; zoning patterns may vary on the scale of a single thin section. In addition, some polycrystals are characterized by high-angle misorientation boundaries that may be in special (non-random) orientations, an observation that indicates that these polycrystals are not random clusters of grains. The presence of internal grain boundaries may affect diffusion pathways and length scales, and may facilitate communication of porphyroblast interiors with matrix phases, thereby influencing reaction history of the rock and the composition/zoning of garnet.

  13. Weighted Clustering

    DEFF Research Database (Denmark)

    Ackerman, Margareta; Ben-David, Shai; Branzei, Simina


    We investigate a natural generalization of the classical clustering problem, considering clustering tasks in which different instances may have different weights.We conduct the first extensive theoretical analysis on the influence of weighted data on standard clustering algorithms in both...... the partitional and hierarchical settings, characterizing the conditions under which algorithms react to weights. Extending a recent framework for clustering algorithm selection, we propose intuitive properties that would allow users to choose between clustering algorithms in the weighted setting and classify...... algorithms accordingly....

  14. Cluster Lenses

    CERN Document Server

    Kneib, Jean-Paul; 10.1007/s00159-011-0047-3


    Clusters of galaxies are the most recently assembled, massive, bound structures in the Universe. As predicted by General Relativity, given their masses, clusters strongly deform space-time in their vicinity. Clusters act as some of the most powerful gravitational lenses in the Universe. Light rays traversing through clusters from distant sources are hence deflected, and the resulting images of these distant objects therefore appear distorted and magnified. Lensing by clusters occurs in two regimes, each with unique observational signatures. The strong lensing regime is characterized by effects readily seen by eye, namely, the production of giant arcs, multiple-images, and arclets. The weak lensing regime is characterized by small deformations in the shapes of background galaxies only detectable statistically. Cluster lenses have been exploited successfully to address several important current questions in cosmology: (i) the study of the lens(es) - understanding cluster mass distributions and issues pertaining...

  15. 77 FR 33601 - National Caribbean-American Heritage Month, 2012 (United States)


    ... Documents#0;#0; ] Proclamation 8835 of June 1, 2012 National Caribbean-American Heritage Month, 2012 By the... their lives what they will, and during National Caribbean- American Heritage Month, we celebrate their... Caribbean-American Heritage Month. I encourage all Americans to celebrate the history and culture...

  16. American Heroism Seen From the Band of Brothers

    Institute of Scientific and Technical Information of China (English)



    Band of Brothers is a mirror of American heroism. It shows us a clear view of what is really American heroism, which spiritually leads the American society, not only in the American history, but also in the recent development of the nation.

  17. Data Clustering (United States)

    Wagstaff, Kiri L.


    On obtaining a new data set, the researcher is immediately faced with the challenge of obtaining a high-level understanding from the observations. What does a typical item look like? What are the dominant trends? How many distinct groups are included in the data set, and how is each one characterized? Which observable values are common, and which rarely occur? Which items stand out as anomalies or outliers from the rest of the data? This challenge is exacerbated by the steady growth in data set size [11] as new instruments push into new frontiers of parameter space, via improvements in temporal, spatial, and spectral resolution, or by the desire to "fuse" observations from different modalities and instruments into a larger-picture understanding of the same underlying phenomenon. Data clustering algorithms provide a variety of solutions for this task. They can generate summaries, locate outliers, compress data, identify dense or sparse regions of feature space, and build data models. It is useful to note up front that "clusters" in this context refer to groups of items within some descriptive feature space, not (necessarily) to "galaxy clusters" which are dense regions in physical space. The goal of this chapter is to survey a variety of data clustering methods, with an eye toward their applicability to astronomical data analysis. In addition to improving the individual researcher’s understanding of a given data set, clustering has led directly to scientific advances, such as the discovery of new subclasses of stars [14] and gamma-ray bursts (GRBs) [38]. All clustering algorithms seek to identify groups within a data set that reflect some observed, quantifiable structure. Clustering is traditionally an unsupervised approach to data analysis, in the sense that it operates without any direct guidance about which items should be assigned to which clusters. There has been a recent trend in the clustering literature toward supporting semisupervised or constrained

  18. Cluster Chemistry

    Institute of Scientific and Technical Information of China (English)


    @@ Cansisting of eight scientists from the State Key Laboratory of Physical Chemistry of Solid Surfaces and Xiamen University, this creative research group is devoted to the research of cluster chemistry and creation of nanomaterials.After three-year hard work, the group scored a series of encouraging progresses in synthesis of clusters with special structures, including novel fullerenes, fullerene-like metal cluster compounds as well as other related nanomaterials, and their properties study.

  19. Community History. (United States)

    Lewis, Helen M.


    Recounts the experience of researching community history in Ivanhoe, Virginia, between 1987 and 1990. The Ivanhoe History Project involved community members in collecting photographs, memorabilia, and oral histories of their town. Subsequent published volumes won the W. D. Weatherford Award and inspired a quilt exhibit and a theatrical production.…

  20. The Modern History of American Agriculture and the Its Enlightenment on China%美国农业现代化的历程及对我国的启示

    Institute of Scientific and Technical Information of China (English)



    The development history of modern agriculture of the United States and other developed countries has an important reference significance for agriculture modernization of the after -development countries.American modern agriculture started earlier,from the angle of government agricultural policies promote the development of modern agriculture,it can be divided into three periods,experienced agricultural machinery revolution,chemical revolution,biological revolution and management revo-lution.In terms of government support system,agricultural cooperative organization,the market system and agricultural infor-mation system,they have lots of enlightenment on the development of China's modern agriculture.%美国等发达国家现代农业发展历程对后发展国家的农业现代化具有重要的借鉴意义。美国的现代农业起步较早,从政府农业政策推动现代农业发展的角度,大致可以分为三个时期,经历了农业机械革命、化学革命和生物革命以及管理革命。在政府支持体系、农业合作组织、市场体系、农业信息化体系等方面对中国的现代农业发展有着诸多启示。

  1. Leopoldo Zea e o movimento latino-americano de História das idéias Leopoldo Zea and the Latin-American movement of History of Ideas

    Directory of Open Access Journals (Sweden)

    Eugênio Rezende de Carvalho


    Full Text Available O artigo analisa as etapas de fundação e consolidação de um dos mais importantes movimentos intelectuais da América Latina no século XX - o movimento latino-americano de História das Ideias -, a partir, sobretudo, das ações e escritos de seu principal líder e fundador, o filósofo mexicano Leopoldo Zea Aguilar (1912-2004. Na etapa de fundação, que corresponde à década de 1940, o foco principal é na obra inicial de Zea, bem como em seus primeiros esforços no sentido da articulação e organização institucional do movimento em escala continental. Já na etapa seguinte, que corresponde à década de 1950, é abordado o processo de consolidação orgânica e epistemológica do movimento.This article analyzes the stages of foundation and consolidation of one of the most important intellectual movements of Latin America in the twentieth century - the Latin-American movement of History of Ideas -, starting from actions and writings of its main leader and founder, the Mexican philosopher Leopoldo Zea Aguilar (1912-2004. In the 1940s, during the foundation period, the main focus is on the primary work of Zea, as well as on his first efforts to articulate and organize this movement in continental scale. Moreover, in the following stage held in the 1950s, the process of organic and epistemology consolidation of the movement is invoked.

  2. American Military History: A Selected Bibliography (United States)


    Project. Carlisle Barracks: U.S. Army War College, March 12, 2012. 38pp. (AD-A560-677) Bartlett , Merrill L...2011) Sheehan, Neil . A Fiery Peace in a Cold War: Bernard Schriever and the Ultimate Weapon. New York: Random House, 2009. 534pp. (E745 .S34S34 2009

  3. Exploring "American History X" through Transformational Learning (United States)

    Sharma, Sonia


    Adult educators often struggle with finding creative ways to help students understand adult learning theories and applications of those theories in professional practice. Media analysis of popular culture can uncomplicate this task by engaging learners in understanding concepts, principles or theories (Baumgartner & Merriam, 1999). The purpose of…

  4. Using Images of Women in American History (United States)

    Bennett, Linda B.; Williams, Frances Janeene


    Research on the inclusion of women in textbooks found severe inequalities in the way women were included in text and illustration. The use of carefully and purposefully selected images in the classroom can address both the lack of images of women in textbooks as well as the stereotypical portrayal of woman in textbook images.

  5. Oral History in Biography: A Shaping Source. (United States)

    Weidman, Bette S.


    Examines the relationship between oral history and biography. Looks specifically at three studies of individual American Indians. Investigates the literary forms authors invented, reshaped, or adopted to bring oral narrative into biographic form. (RKM)

  6. Clustered regression with unknown clusters

    CERN Document Server

    Barman, Kishor


    We consider a collection of prediction experiments, which are clustered in the sense that groups of experiments ex- hibit similar relationship between the predictor and response variables. The experiment clusters as well as the regres- sion relationships are unknown. The regression relation- ships define the experiment clusters, and in general, the predictor and response variables may not exhibit any clus- tering. We call this prediction problem clustered regres- sion with unknown clusters (CRUC) and in this paper we focus on linear regression. We study and compare several methods for CRUC, demonstrate their applicability to the Yahoo Learning-to-rank Challenge (YLRC) dataset, and in- vestigate an associated mathematical model. CRUC is at the crossroads of many prior works and we study several prediction algorithms with diverse origins: an adaptation of the expectation-maximization algorithm, an approach in- spired by K-means clustering, the singular value threshold- ing approach to matrix rank minimization u...

  7. Subspace clustering through attribute clustering

    Institute of Scientific and Technical Information of China (English)

    Kun NIU; Shubo ZHANG; Junliang CHEN


    Many recently proposed subspace clustering methods suffer from two severe problems. First, the algorithms typically scale exponentially with the data dimensionality or the subspace dimensionality of clusters. Second, the clustering results are often sensitive to input parameters. In this paper, a fast algorithm of subspace clustering using attribute clustering is proposed to over-come these limitations. This algorithm first filters out redundant attributes by computing the Gini coefficient. To evaluate the correlation of every two non-redundant attributes, the relation matrix of non-redundant attributes is constructed based on the relation function of two dimensional united Gini coefficients. After applying an overlapping clustering algorithm on the relation matrix, the candidate of all interesting subspaces is achieved. Finally, all subspace clusters can be derived by clustering on interesting subspaces. Experiments on both synthesis and real datasets show that the new algorithm not only achieves a significant gain of runtime and quality to find subspace clusters, but also is insensitive to input parameters.

  8. Latin American Insurgencies, (United States)


    poses one of the great ironies of recent military history. In an era when rapid technological development can render state- of-the- art prototypes...linked to Sali a- dor-ati terrorist operat ik s m orking through lhe Re’ olutionar\\ [) art \\ of’ Central American Workers-1.1dOUNteL11 \\\\fillh Cuban- N...Revolutionary Army Frente Urbano Zapatista (FUZ). See Zapatista Urban Front FAR. See Rebel Armed Forces FSLN. See Sandinista National Farabundo Marti

  9. New Resources for Black History Month. (United States)

    Broderick, Patricia, Ed.


    Reviews eight children's books, three books for teachers, and a set of posters that focus on African American history. The books focus on rhymes, poetry, the negro baseball leagues, the African American family, the civil rights movement, the Coretta Scott King Awards, multicultural education, and black innovators. (MDM)

  10. History Sources on the Internet. (United States)

    Fink, Kenneth D.

    This paper provides descriptions of key online history resources useful to teachers, librarians, and other education professionals. Highlights include: primary sources on the Internet; archives; Online Public Access Catalogs (OPACs); the American Historical Association (AHA) Web site; state and federal government resources; business history…

  11. Living History: Clark M. Blatteis (United States)

    Quan, Ning


    In 2005, the American Physiological Society (APS) initiated the Living History Project to recognize senior members who have made extraordinary contributions during their career to the advancement of the discipline and profession of physiology. During 2007, the APS Section of Environmental and Exercise Physiology selected Clark M. Blatteis to be…

  12. Living History: Elsworth R. Buskirk (United States)

    Tipton, Charles M.


    In 2005, the American Physiological Society (APS) initiated the Living History of Physiology Archival Program to recognize senior members who have made significant contributions during their career to the advancement of the discipline and the profession of physiology. Subsequently, the leadership of the APS Section of Environmental and Exercise…

  13. AAS Oral History Project (United States)

    Buxner, Sanlyn; Holbrook, Jarita; AAS Oral History Team


    Now in its fourth year, the AAS Oral History Project has interviewed over 80 astronomers from all over the world. Led by the AAS Historical Astronomy Division (HAD) and partially funded by the American Institute of Physics Niels Bohr Library and ongoing support from the AAS, volunteers have collected oral histories from astronomers at professional meetings starting in 2015, including AAS, DPS, and the IAU general assembly. Each interview lasts one and a half to two hours and focuses on interviewees’ personal and professional lives. Questions include those about one’s family, childhood, strong influences on one’s scientific career, career path, successes and challenges, perspectives on how astronomy is changing as a field, and advice to the next generation. Each interview is audio recorded and transcribed, the content of which is checked with each interviewee. Once complete, interview transcripts are posted online as part of a larger oral history library at Future analysis will reveal a rich story of astronomers and will help the community address issues of diversity, controversies, and the changing landscape of science. We are still recruiting individuals to be interviewed from all stages of career from undergraduate students to retired and emeritus astronomers. Contact Jarita Holbrook to schedule an interview or to find out more information about the project ( Also, contact Jarita Holbrook if you would like to become an interviewer for the project.

  14. Entangled histories (United States)

    Cotler, Jordan; Wilczek, Frank


    We introduce quantum history states and their mathematical framework, thereby reinterpreting and extending the consistent histories approach to quantum theory. Through thought experiments, we demonstrate that our formalism allows us to analyze a quantum version of history in which we reconstruct the past by observations. In particular, we can pass from measurements to inferences about ‘what happened’ in a way that is sensible and free of paradox. Our framework allows for a richer understanding of the temporal structure of quantum theory, and we construct history states that embody peculiar, non-classical correlations in time.

  15. Cluster editing

    DEFF Research Database (Denmark)

    Böcker, S.; Baumbach, Jan


    . The problem has been the inspiration for numerous algorithms in bioinformatics, aiming at clustering entities such as genes, proteins, phenotypes, or patients. In this paper, we review exact and heuristic methods that have been proposed for the Cluster Editing problem, and also applications......The Cluster Editing problem asks to transform a graph into a disjoint union of cliques using a minimum number of edge modifications. Although the problem has been proven NP-complete several times, it has nevertheless attracted much research both from the theoretical and the applied side...

  16. Cluster analysis

    CERN Document Server

    Everitt, Brian S; Leese, Morven; Stahl, Daniel


    Cluster analysis comprises a range of methods for classifying multivariate data into subgroups. By organizing multivariate data into such subgroups, clustering can help reveal the characteristics of any structure or patterns present. These techniques have proven useful in a wide range of areas such as medicine, psychology, market research and bioinformatics.This fifth edition of the highly successful Cluster Analysis includes coverage of the latest developments in the field and a new chapter dealing with finite mixture models for structured data.Real life examples are used throughout to demons

  17. Weighted Clustering

    CERN Document Server

    Ackerman, Margareta; Branzei, Simina; Loker, David


    In this paper we investigate clustering in the weighted setting, in which every data point is assigned a real valued weight. We conduct a theoretical analysis on the influence of weighted data on standard clustering algorithms in each of the partitional and hierarchical settings, characterising the precise conditions under which such algorithms react to weights, and classifying clustering methods into three broad categories: weight-responsive, weight-considering, and weight-robust. Our analysis raises several interesting questions and can be directly mapped to the classical unweighted setting.

  18. 76 FR 25523 - Older Americans Month, 2011 (United States)


    ... Americans, celebrate their role in steering the course of our history, and recognize their valuable insights... kitchens. They mentor our children and stock the shelves at food pantries and libraries. Programs...

  19. [Historical demography in the Central American isthmus]. (United States)

    Perez Brignoli, H


    The author reviews and evaluates sources of information on the demographic history of Central America. Past and present administrative, state, ecclesiastical, and genealogical sources are examined, and recent studies of various Central American countries are cited. A bibliography is provided

  20. Intellectual History

    DEFF Research Database (Denmark)

    In the 5 Questions book series, this volume presents a range of leading scholars in Intellectual History and the History of Ideas through their answers to a brief questionnaire. Respondents include Michael Friedman, Jacques le Goff, Hans Ulrich Gumbrecht, Jonathan Israel, Phiip Pettit, John Pocock...

  1. Romerrigets historie

    DEFF Research Database (Denmark)

    Christiansen, Erik

    Romerrigets historie fra Roms legendariske grundlæggelse i 753 f.v.t. til Heraklios' tronbestigelse i 610 e.v.t.......Romerrigets historie fra Roms legendariske grundlæggelse i 753 f.v.t. til Heraklios' tronbestigelse i 610 e.v.t....

  2. Fast Affinity Propagation Clustering based on Machine Learning


    Shailendra Kumar Shrivastava; J. L. Rana; DR.R.C.JAIN


    Affinity propagation (AP) was recently introduced as an un-supervised learning algorithm for exemplar based clustering. In this paper a novel Fast Affinity Propagation clustering Approach based on Machine Learning (FAPML) has been proposed. FAPML tries to put data points into clusters based on the history of the data points belonging to clusters in early stages. In FAPML we introduce affinity learning constant and dispersion constant which supervise the clustering process. FAPML also enforces...

  3. Quantum Histories

    CERN Document Server

    Kent, A


    There are good motivations for considering some type of quantum histories formalism. Several possible formalisms are known, defined by different definitions of event and by different selection criteria for sets of histories. These formalisms have a natural interpretation, according to which nature somehow chooses one set of histories from among those allowed, and then randomly chooses to realise one history from that set; other interpretations are possible, but their scientific implications are essentially the same. The selection criteria proposed to date are reasonably natural, and certainly raise new questions. For example, the validity of ordering inferences which we normally take for granted --- such as that a particle in one region is necessarily in a larger region containing it --- depends on whether or not our history respects the criterion of ordered consistency, or merely consistency. However, the known selection criteria, including consistency and medium decoherence, are very weak. It is not possibl...

  4. The New Deal: A Global History

    NARCIS (Netherlands)

    Patel, Kiran Klaus


    The New Deal: A Global History provides a radically new interpretation of a pivotal period in US history. The first comprehensive study of the New Deal in a global context, the book compares American responses to the international crisis of capitalism and democracy during the 1930s to responses by o

  5. 77 FR 13185 - Women's History Month, 2012 (United States)


    ...#0;#0; ] Proclamation 8780 of March 1, 2012 Women's History Month, 2012 By the President of the United States of America A Proclamation As Americans, ours is a legacy of bold independence and... Women's History Month, we commemorate their struggles, celebrate centuries of progress, and reaffirm...

  6. Clustering of absorption line systems

    CERN Document Server

    Petitjean, P


    Absorption line systems are luminosity unbiased tracers of the spatial distribution of baryons over most of the history of the Universe. I review the importance of studying the clustering properties of the absorbers and the impact of VLT in this subject. The primary aim of the project is to track the evolution of the structures of the Universe back in time.

  7. Placing Asterisks: An Approach to American Studies (United States)

    Lawler, Daniel O.


    In this article, the author describes how he co-teaches an interdisciplinary American Studies class that fosters inquiry and reflection on the complexity of an authentic telling of US history. With the help of his partner, a social studies teacher, the author designed an American Studies course that aims to reveal to students that America's…

  8. Guns as a Symbol of American Individualism

    Institute of Scientific and Technical Information of China (English)



    Due to continuous gun violence, Americans' crazy love for guns has always been attacked home and abroad. Americans' passion for guns derives from individualism through the development of American history. They consider guns as a means to guarantee independence and freedom, and therefore as a symbol of American individualism.

  9. A Brief Introduction of American Political Cultrue

    Institute of Scientific and Technical Information of China (English)



    @@ The American Constitution in 1787 After the repeated compromise, the work of drawing up a constitution was completed on September 17,1787, a day which has been designated as Constitution Day of America. The appearance of constitution was a great event in American history. It established the Federal System which was the first in the world at that time.

  10. Civil Rights and Japanese-American Internment. (United States)

    Francis, Greg; Hojo, Samantha; Lai, Selena; Mukai, Gary; Yoda, Steven

    Students may not be as familiar with the Asian American struggle for equal rights as they are with the black struggle for equal rights. But Asian Americans' civil rights have also been challenged and/or denied throughout their history in the United States. This curriculum module contains six lessons and can be used as a supplement to history…

  11. Depression, Sociocultural Factors, and African American Women (United States)

    Hunn, Vanessa Lynn; Craig, Carlton David


    The authors discuss depression in African American women from a sociocultural perspective, including aspects of oppression and racism that affect symptom manifestation. The authors highlight John Henryism as a coping mechanism, the history and continuing role of the African American church as a safe haven, and strategies for culturally competent…

  12. American Studies Center:An Introduction

    Institute of Scientific and Technical Information of China (English)

    Shu; HONG


    <正>The year 2012 was remarkable in the history of American Studies at Sichuan University.First,it marked the 28thAnniversary of the founding of the American Studies Center,which had its official debut in May,1984,coinciding with the establishment of the US Consulate General in Chengdu.U.S.Vice President George Bush was present at the Inauguration Ceremony of the American Studies Center,and

  13. What is a polycentric history of psychology?

    Directory of Open Access Journals (Sweden)

    Adrian Charles Brock


    Full Text Available The term, "polycentric history of psychology" was originally used by Kurt Danziger and it has since been adopted by other historians of psychology. The article provides an introduction to this approach. The trend towards the internationalisation of psychology has led to the history of American psychology being supplemented by other local histories. Polycentric history is contrasted this approach. It is concerned with the interrelationships between centres and not individual centres considered in isolation. The article concludes with some examples of history that has been written from a polycentric perspective.

  14. Star Cluster Buzzing With Pulsars (United States)


    A dense globular star cluster near the center of our Milky Way Galaxy holds a buzzing beehive of rapidly-spinning millisecond pulsars, according to astronomers who discovered 21 new pulsars in the cluster using the National Science Foundation's 100-meter Robert C. Byrd Green Bank Telescope (GBT) in West Virginia. The cluster, called Terzan 5, now holds the record for pulsars, with 24, including three known before the GBT observations. Pulsar Diagram Pulsar Diagram: Click on image for more detail. "We hit the jackpot when we looked at this cluster," said Scott Ransom, an astronomer at the National Radio Astronomy Observatory in Charlottesville, VA. "Not only does this cluster have a lot of pulsars -- and we still expect to find more in it -- but the pulsars in it are very interesting. They include at least 13 in binary systems, two of which are eclipsing, and the four fastest-rotating pulsars known in any globular cluster, with the fastest two rotating nearly 600 times per second, roughly as fast as a household blender," Ransom added. Ransom and his colleagues reported their findings to the American Astronomical Society's meeting in San Diego, CA, and in the online journal Science Express. The star cluster's numerous pulsars are expected to yield a bonanza of new information about not only the pulsars themselves, but also about the dense stellar environment in which they reside and probably even about nuclear physics, according to the scientists. For example, preliminary measurements indicate that two of the pulsars are more massive than some theoretical models would allow. "All these exotic pulsars will keep us busy for years to come," said Jason Hessels, a Ph.D student at McGill University in Montreal. Globular clusters are dense agglomerations of up to millions of stars, all of which formed at about the same time. Pulsars are spinning, superdense neutron stars that whirl "lighthouse beams" of radio waves or light around as they spin. A neutron star is what is

  15. Family History (United States)

    Your family history includes health information about you and your close relatives. Families have many factors in common, including their genes, ... as heart disease, stroke, and cancer. Having a family member with a disease raises your risk, but ...

  16. Fuzzy Clustering

    DEFF Research Database (Denmark)

    Berks, G.; Keyserlingk, Diedrich Graf von; Jantzen, Jan;


    and clustering are the basic concerns in medicine. Classification depends on definitions of the classes and their required degree of participant of the elements in the cases' symptoms. In medicine imprecise conditions are the rule and therefore fuzzy methods are much more suitable than crisp ones. Fuzzy c....... A symptom may belong to more than one class. For instance to the class of very severe disease and to the class of failure of awareness of the own disturbance. The description of language failures by c-mean classification of analyzed factors correspond in many but not in all cases to the traditional......-mean clustering is an easy and well improved tool, which has been applied in many medical fields. We used c-mean fuzzy clustering after feature extraction from an aphasia database. Factor analysis was applied on a correlation matrix of 26 symptoms of language disorders and led to five factors. The factors...

  17. Native American youth and justice

    Directory of Open Access Journals (Sweden)

    Dr.Sc. Laurence A. French


    Full Text Available Youth and delinquency issues have long been problematic among Native Americans groups both on- and off-reservation. This phenomenon is further complicated by the cultural diversity among American Indians and Alaska Natives scattered across the United States. In address these issues, the paper begins with a historical overview of Native American youth. This history presents the long tradition of federal policies that, how well intended, have resulted in discriminatory practices with the most damages attacks being those directed toward the destruction of viable cultural attributes – the same attributes that make Native Americans unique within United States society. Following the historical material, the authors contrast the pervasive Native American aboriginal ethos of harmony with that of Protestant Ethic that dominates the ethos of the larger United States society. In addition to providing general information on Native American crime and delinquency, the paper also provides a case study of Native American justice within the Navajo Nation, the largest tribe, in both size and population, in the United States. The paper concludes with a discussion of issues specific to Native American youth and efforts to address these problems.

  18. Polish Americans. Second, Revised Edition. (United States)

    Lopata, Helen Znaniecka

    This book examines Polonia, the Polish ethnic community in America created by three giant waves of immigration between 1880 and 1990. The complicated history of this ethnic group is reflected in the lives of increasing numbers of Polish Americans, including recent immigrants brought by political and economic changes, as they achieve middle class…

  19. 75 FR 25099 - Jewish American Heritage Month, 2010 (United States)


    ... of the past century who sought refuge from the horrors of pogroms and the Holocaust. As they have.... During Jewish American Heritage Month we celebrate this proud history and honor the invaluable... Americans have shaped our Nation and helped steer the course of our history. We are a stronger and...


    Institute of Scientific and Technical Information of China (English)


    Disputes over historical issues have been a factor affecting China-Japan relations for quite some time. If mishandled, they could remain an obstacle to the further improvement of bilateral ties, some American scholars believe.Richard C. Bush, senior fell

  1. Chemical evolution of star clusters. (United States)

    van Loon, Jacco Th


    I discuss the chemical evolution of star clusters, with emphasis on old Galactic globular clusters (GCs), in relation to their formation histories. GCs are clearly formed in a complex fashion, under markedly different conditions from any younger clusters presently known. Those special conditions must be linked to the early formation epoch of the Galaxy and must not have occurred since. While a link to the formation of GCs in dwarf galaxies has been suggested, present-day dwarf galaxies are not representative of the gravitational potential wells within which the GCs formed. Instead, a formation deep within the proto-Galaxy or within dark-matter mini-haloes might be favoured. Not all GCs may have formed and evolved similarly. In particular, we may need to distinguish Galactic Halo from Galactic Bulge clusters.

  2. Investigating Exoplanets Within Stellar Clusters (United States)

    Glaser, Joseph Paul; Reisinger, Tyler; Thornton, Jonathan; McMillan, Stephen L. W.


    Recent surveys exploring nearby open clusters have yielded noticeable differences in the planetary population from that seen in the Field. This is surprising, as it is widely accepted that a majority of stars form within clustered environments before dispersing throughout the galaxy. Though dynamical arguments have been used to explain this discrepancy in the past, previous surveys' observational statistics and detection biases can also be used to argue that the open cluster planet population is indistinguishable from the Field.Our group aims to explore the role of stellar close encounters and interplanetary interactions in producing the observed exoplanet populations for both open cluster stars and Field stars. We employ a variety of different computational techniques to investigate these effects, ranging from traditional Monte Carlo scattering experiments to multi-scale n-body simulations. We are interested in: the effects of stellar binaries; Hot Jupiter migrations; long-period ice giants; and the habitability history of terrestrial planets.

  3. XMM Observations of Metal Abundances in Galaxy Clusters

    Directory of Open Access Journals (Sweden)

    L. Lovisari


    Full Text Available The hot gas that fills the space between galaxies in clusters is rich in metals. Due to their large potential well, galaxy clusters accumulate metals over the whole history of the cluster, and retain important information on cluster formation and evolution.We derive detailed metallicity maps for a sample of 5 clusters, observed with XMM-Newton, to study the distribution of metals in the Intra-Cluster Medium (ICM. We show that even in relaxed clusters the distribution of metals shows many inhomogeneities with several maxima separated by low metallicity regions. We also found a deviation from the expected temperature-metallicity relation.

  4. Unique post-doctoral positions in Master of Arts in Teaching Earth Science program at the American Museum of Natural History: Involving early-career research scientists in Earth science education (United States)

    Flores, K. E.; Nadeau, P. A.; Zirakparvar, N. A.; Grcevich, J.; Ustunisik, G. K.


    Post-doctoral positions in Earth science fields traditionally emphasize research within a university setting or research institute. Such positions may include a teaching component, but one which is often restricted to introductory undergraduate Earth science courses or upper-level courses within their own field of specialization. With such a specific focus, there may not be much inclination on the part of a post-doctoral fellow to involve themselves in broader education programs, such as public outreach or secondary schools. The American Museum of Natural History is now conducting a non-traditional post-doctoral position as part of its new Master of Arts in Teaching Earth Science (MAT). This pilot program involves forging a one-of-a-kind partnership between a world-class research museum and high-needs schools in New York City with the goal of addressing a critical shortage of qualified Earth Science teachers in New York State, particularly in high-needs schools with diverse populations. The program, which is part of the state's Race to the Top initiative, is approved by the NYS Board of Regents and will prepare a total of 50 candidates in two cohorts to earn a Board of Regents-awarded Masters of Arts in Teaching (MAT) degree with a specialization in Earth Science for grades 7-12. The post-doctoral fellows of the MAT program have unique 3-year positions, with more traditional research-based work comprising 65% of the tenure and non-traditional educational roles 35%. The MAT fellows are divided into two types: those with a teaching role, who are involved in the co-design and co-teaching of graduate-level Earth science courses; and those in a research/mentoring role, who design and teach a summer-long science research practicum while also providing informal support to MAT teaching candidates throughout the school year. Over the first year of the MAT program's implementation, fellows have been exposed to a range of activities outside the realm of a traditional post

  5. American Indian Students Speak out: What's Good Citizenship? (United States)

    Martin, Leisa A.; Chiodo, John J.


    For much of our country's history, citizenship has eluded American Indian people. With this in mind, the authors conducted a study to determine the perceptions of eighth and eleventh grade American Indian students regarding citizenship. We wanted to find out what American Indian students believe are the attributes of a good citizen; what…

  6. Why Should American Education Be Globalized? It's a Nonsensical Question. (United States)

    Anderson, Lee F.


    Long-term globalization of the world's social structure, the decline of Western dominance of that structure, and the loss of American hegemony within the world necessitate globalization of American education. Americans will need foreign languages, cross-cultural awareness, and an understanding of world history, sociology, and geography. (PP)

  7. 75 FR 62453 - German-American Day, 2010 (United States)


    ... October 6, 2010, as German-American Day. I encourage all Americans to learn more about the history of... Documents#0;#0; ] Proclamation 8580 of October 6, 2010 German-American Day, 2010 By the President of the... shores in search of freedom, opportunity, and the chance at a better life. The German men and women...

  8. Review on the Disillusionment of Gatsby’s American Dream

    Institute of Scientific and Technical Information of China (English)



    As a spokesperson of the Jazz Age, the American famous novelist F· Scott Fitzgerald who published his masterpiece The Great Gatsby in 1925 is recognized as one of the most important novelists in American literature history. With profound meaning, it is considered as a classic novel revealing the ilusory essence of the American dream. By narrating Gatsby's life, the author skilfuly interprets the conflict between the dream and reality as wel as the intense clash of the spiritual desire and substantial desire in real life. And ultimately Gatsby’s destruction in such conflicts is linked with American history, which implies national tragedy of the United States and satirizes ilusion of American dream.

  9. The Mexican American Heritage: With Writing Exercises. (United States)

    Jimenez, Carlos M.

    Written by a Los Angeles history teacher frustrated by the lack of culturally relevant materials, this book covers some of the most interesting events in the history of Mexico and the heritage of Mexican Americans. Chapters are: (1) Indian Mexico (Teotihuacan, the Maya, the Toltecs, and the Aztecs); (2) La Conquista (Cortes and Moctezuma, conquest…

  10. Cluster-surface interaction: from soft landing to implantation

    DEFF Research Database (Denmark)

    Popok, Vladimir; Barke, Ingo; Campbell, Eleanor E.B.;


    energy and what effects are induced under different energetic regimes. The review starts with an introduction to the field and a short history of cluster beam development. Then fundamental physical aspects of cluster formation and the most common methods for the production of cluster beams are overviewed...

  11. Impostor Syndrome, a Reparative History

    Directory of Open Access Journals (Sweden)

    Dana Simmons


    Full Text Available This is an attempt to insert the stories we tell about fear and shame into a history of twentieth-century psychology and its obsession with achievement and modernization. It is an attempt to write an affective history of achievement at the turn of the millennium - and to make this feeling history. Impostor Syndrome is a pop-psychological diagnosis, employed to explain the low presence of women in STEM fields, business and academic administration and ’thought leadership’ in the pubic sphere. The article follows the intellectual lineage of two precursors of Impostor Syndrome, Fear of Success and the Impostor Phenomenon. It argues that the grouping of gender/ race/ success/ affect was a keystone of twentieth-century American psychology and development theory. The history of this feeling has consequences for thinking about situated knowledge, realism and epistemic justice.

  12. Simpósio Ibero-Americano de História da Enfermagem: novas perspectivas da produção intelectual em história da enfermagem Coloquio Ibero-Americano de Historia de la Enfermería: nuevas perspectivas de la producción intelectual en historia de la enfermería Ibero-American Symposium on History of Nursing: new perspectives of intellectual production in the history of nursing

    Directory of Open Access Journals (Sweden)

    Almerinda Moreira


    Full Text Available A produção intelectual apresentada no I Simpósio Ibero-Americano de História da Enfermagem foi organizada a partir de três eixos temáticos: antropologia do cuidado, história das instituições de ensino, de assistência e agremiações de enfermagem e história de vida, totalizando 198 estudos. Mediante os resultados apresentados a produção mostrada no simpósio apontou para a tendência dos estudos em história da enfermagem, nos eixos temáticos, pela ordem de interesse dos pesquisadores em: história das instituições, antropologia do cuidado e história de vida.La producción intelectual presentada en el I Simposio Ibero-Americano de Historia de la Enfermería fue organizada a partir de tres bases temáticas: antropología del cuidado, historia de las instituciones de enseñanza, asistencia y agremiaciones de enfermería y historia de vida, totalizando 198 estudios. Mediante los resultados presentados, la producción presentada en el simposio reveló la tendencia de los estudios en historia de la enfermería, en las bases temáticas, por la orden de interés de los investigadores en: historia de las instituciones, antropología del cuidado y historia de vida.Intellectual production presented in the I Symposium Ibero-American of Nursing History was organized in three thematic bases: anthropology care, history of the institutions of teaching, caring and associations of nursing and history of life, totalizing 198 researches. Results of production in the Symposium showed that tendency of the researches in the nursing history in the thematic bases, according with interest of researchers in: history of institutions, anthropology of care and history of life.

  13. American ginseng (United States)

    ... and inflammation of the lining of the stomach (gastritis). American ginseng is also used for low iron ... Dizziness. Pregnancy and childbirth complications. Stress. Anemia. Insomnia. Gastritis. Impotence. Fever. Hangover symptoms. Headaches. Swine flu. Aging. ...

  14. Star Clusters in the Magellanic Clouds-1: Parameterisation and Classification of 1072 Clusters in the LMC (United States)

    Nayak, P. K.; Subramaniam, A.; Choudhury, S.; Indu, G.; Sagar, Ram


    We have introduced a semi-automated quantitative method to estimate the age and reddening of 1072 star clusters in the Large Magellanic Cloud (LMC) using the Optical Gravitational Lensing Experiment (OGLE) III survey data. This study brings out 308 newly parameterised clusters. In a first of its kind, the LMC clusters are classified into groups based on richness/mass as very poor, poor, moderate and rich clusters, similar to the classification scheme of open clusters in the Galaxy. A major cluster formation episode is found to happen at 125±25 Myr in the inner LMC. The bar region of the LMC appears prominently in the age range 60 - 250 Myr and is found to have a relatively higher concentration of poor and moderate clusters. The eastern and the western ends of the bar are found to form clusters initially, which later propagates to the central part. We demonstrate that there is a significant difference in the distribution of clusters as a function of mass, using a movie based on the propagation (in space and time) of cluster formation in various groups. The importance of including the low mass clusters in the cluster formation history is demonstrated. The catalog with parameters, classification, and cleaned and isochrone fitted CMDs of 1072 clusters, which are available as online material, can be further used to understand the hierarchical formation of clusters in selected regions of the LMC.

  15. Quotients of cluster categories


    Jorgensen, Peter


    Higher cluster categories were recently introduced as a generalization of cluster categories. This paper shows that in Dynkin types A and D, half of all higher cluster categories are actually just quotients of cluster categories. The other half can be obtained as quotients of 2-cluster categories, the "lowest" type of higher cluster categories. Hence, in Dynkin types A and D, all higher cluster phenomena are implicit in cluster categories and 2-cluster categories. In contrast, the same is not...

  16. A Short History of the Movies. Second Edition. (United States)

    Mast, Gerald

    This second edition of "A Short History of the Movies" includes expanded information and judgments about some of the "old masters" of film; an updated discussion of the "new masters"; and new sections on Japanese, Indian, and Czech cinema. In general, this history reveals significant trends in film history. American films are the primary focus,…

  17. Linjefaget historie

    DEFF Research Database (Denmark)

    Rasch-Christensen, Andreas

    Afhandlingen er en undersøgelse af linjefaget historie ved læreruddannelsen. Med fokus på subjektperspektivet peger afhandlingen på en række afgørende udviklingsperspektiver for læreruddannelsen, uddannelsen af historielærere og folkeskolens historieundervisning.......Afhandlingen er en undersøgelse af linjefaget historie ved læreruddannelsen. Med fokus på subjektperspektivet peger afhandlingen på en række afgørende udviklingsperspektiver for læreruddannelsen, uddannelsen af historielærere og folkeskolens historieundervisning....

  18. Matematikkens historie

    DEFF Research Database (Denmark)

    Hansen, Vagn Lundsgaard


    Matematikkens historie i syv kapitler: 1. Matematik i støbeskeen; 2. Matematikkens græske arv; 3. Den gyldne tidsalder for hinduer og arabere; 4. Matematik i Kina; 5. Renæssancens matematik; 6. Regning med infinitesimaler ser dagens lys; 7. Matematik i det tyvende århundrede.......Matematikkens historie i syv kapitler: 1. Matematik i støbeskeen; 2. Matematikkens græske arv; 3. Den gyldne tidsalder for hinduer og arabere; 4. Matematik i Kina; 5. Renæssancens matematik; 6. Regning med infinitesimaler ser dagens lys; 7. Matematik i det tyvende århundrede....

  19. Environmental history

    DEFF Research Database (Denmark)

    Pawson, Eric; Christensen, Andreas Aagaard


    Environmental history is an interdisciplinary pursuit that has developed as a form of conscience to counter an increasingly powerful, forward-looking liberal theory of the environment. It deals with the relations between environmental ideas and materialities, from the work of the geographers George...... risks”. These are exposed by environmental history’s focus on long-run analysis and its narrative form that identifies the stories that we tell ourselves about nature. How a better understanding of past environmental transformations helps to analyse society and agency, and what this can mean...... for solutions and policies, is the agenda for an engaged environmental history from now on....

  20. Regional Innovation Clusters (United States)

    Small Business Administration — The Regional Innovation Clusters serve a diverse group of sectors and geographies. Three of the initial pilot clusters, termed Advanced Defense Technology clusters,...

  1. A Brief Analysis to Modern American Slang

    Institute of Scientific and Technical Information of China (English)

    肖煜晨; 李洋


    Modern American slang has a unique display of feelings and ideas and a long history. It has become a language used widely in every field of work, and it continues to appear in newspapers, TVs, reports, and even election speeches. Modern American slang has gained importance over the years, During its development process, American slang has formed its own unique characteristics: it is humorous, vivid, easy to express feelings, and updates fast. Although scholars’ opinions toward slang have a wide discrepancy, it is undeniable that the emergence and development of modern American slang has conformed to the needs of the society and times.

  2. The Confucian Asian cluster

    Directory of Open Access Journals (Sweden)

    Ionel Sergiu Pirju


    Full Text Available The Confucian Asian cluster consists of China, Hong Kong, Japan, Singapore, South Korea, and Taiwan. Confucian tradition countries were defined by achieving a consistent performance in the global economy, they still representing the major competitors in the EU and North American countries. Their progress is defined by a great national management that was able to influence beneficial management systems applied in organizations, these rules characterized by authority; aims to ensure the confidence in business. This article will present the intercultural values characterizing it, the leadership style and also tracing major macroeconomic considerations. The research is synchronic, analysing the contemporary situation of these countries, and the analysis will be interdisciplinary exploratory, identifying specific regional cultural elements.

  3. Cultural history as polyphonic history

    Directory of Open Access Journals (Sweden)

    Burke, Peter


    Full Text Available This texts offers a reflection on the origins and actual development of the field of cultural history through a comparison with the term that has served as title for this seminar: “polyphonic history”. The author provides an overview of the themes that have structured the seminar (the history of representations, the history of the body and the cultural history of science with the aim of making explicit and clarifying this plurality of voices in the field of history as well as its pervasiveness in other research areas.

    En este texto se ofrece una reflexión sobre el origen y actual desarrollo del campo de la historia cultural a través de una comparación con el término que ha dado título a este seminario: “historia polifónica”. El autor propone un recorrido por las áreas temáticas que han conformado la estructura del seminario (la historia de las representaciones, la historia del cuerpo y la historia cultural de la ciencia con el objeto de explicitar y explicar esta pluralidad de voces en el campo de la historia, así como su repercusión en otras áreas del conocimiento.

  4. Cluster forcing

    DEFF Research Database (Denmark)

    Christensen, Thomas Budde

    -industrialism and the ‘liveable' region. In this paper the cluster strategies that have been applied to the automotive sector in Wales are analysed. The paper includes a theoretical discussion on how the cluster concept has been applied to industrial policies, along with an empirical analysis of the application of the concept...... automotive sector in Wales. The paper draws from a survey of Welsh automotive suppliers on the characteristics of the local business environment and innovation. On the basis of the survey it is concluded that the public sector has an important task ahead concerning the linkages between universities and local...... businesses. The universities were not considered by the participating companies to be important parts of the local business environment and inputs from universities did not appear to be an important source to access knowledge about new product development or new techniques in production, distribution...

  5. Adventures in Law and History. Volume I: Native Americans, the Spanish Frontier, and the Gold Rush. A Law and Civic Education Curriculum for Upper Elementary Grades with Units on Rules and Laws, Property, and Authority. (United States)

    Croddy, Marshall; Degelman, Charles; Doggett, Keri; Hayes, Bill

    This is volume one of a two-volume civics curriculum on law and effective citizenship for upper-elementary students. The lessons, set in American historical eras, engage students in cooperative-learning activities, role plays, simulations, readers theater, stories, and guided discussions, which introduce and reinforce law-related and civic…

  6. Consequences of Learning about Historical Racism among European American and African American Children (United States)

    Hughes, Julie M.; Bigler, Rebecca S.; Levy, Sheri R.


    Knowledge about racism is a critical component of educational curricula and contemporary race relations. To examine children's responses to learning about racism, European American (Study 1; N = 48) and African American (Study 2; N = 69) elementary-aged children (ages 6-11) received history lessons that included information about racism…

  7. Potted history

    NARCIS (Netherlands)

    Van Dijk, T.


    The Jordan Valley was once populated by a people, now almost forgotten by historians, with whom the pharaoh of Egypt sought favour. That is the conclusion reached by Niels Groot, the first researcher to take a PhD at the Delft-Leiden Centre for Archaeology, Art History and Science.

  8. Business History

    DEFF Research Database (Denmark)

    Hansen, Per H.


    This article argues that a cultural and narrative perspective can enrich the business history field, encourage new and different questions and answers, and provide new ways of thinking about methods and empirical material. It discusses what culture is and how it relates to narratives. Taking...

  9. Why History? (United States)

    Duffy, Robert E.


    Examines the way in which studying history contributes to intellectual development. Identifies five mental attributes it enhances: perspective--gained from placing people, events, institutions against larger background; encounter--confronting great ideas, personalities, etc.; relativism in a pluralistic world--developed from immersion in other…

  10. Bulletproof History. (United States)

    Roy, R. H.


    Asserts that the writers and producers of the television documentary, "The Valour and the Horror," provided a false impression of an event to fit preconceived and erroneous interpretations of history. Points out specific examples of inaccurate historical presentations and provides contradictory historical interpretations. (CFR)

  11. Cluster Table - KAIKOcDNA | LSDB Archive [Life Science Database Archive metadata

    Lifescience Database Archive (English)

    Full Text Available [ Credits ] BLAST Search Image Search Home About Archive Update History Contact us ...dentical cDNA sequences that make up cluster. Data file File name: File URL: Download License Update History of This Database Site Policy | Contact Us Cluster Table - KAIKOcDNA | LSDB Archive ...

  12. American Gothic (United States)

    Reardon, Christopher


    This article describes a new curriculum which explores a disturbing side of the Progressive Era. The national education program Facing History and Ourselves is a 25-year-old organization best known for its trenchant examination of the Holocaust and other genocide campaigns. Facing History discovered in the course of that work that many of the…

  13. Money Problems on American Political Election-Based on the Perspective of History and Culture%美国政治选举的金钱问题--基于历史与文化的视角

    Institute of Scientific and Technical Information of China (English)



    Money problems in American politics are the key of American democracy which can not be avoided,money is American political machine running propeller,although the United States government and legislators have reduced the money influence on political election policy and regulations,but American Republic class rely on a large number of the bourgeois elite .The constitution of political election is set from the start to become a money game . The control for the de⁃mocracy and people’s rights causes the essence of American democracy,which gives service to a few people.%美国政治生活中的金钱问题是探讨美国式民主所不可回避的关键,金钱是美国政治机器运转的推进器,虽然美国政府与立法者一直都在为降低金钱对政治选举的影响出台政策与法规限制,但美国立国的阶级依靠是大量的资产阶级精英,宪法对政治选举的设定从一开始便成为精英阶层的金钱游戏。对于民主的遏制和民众权利的制约,致使美国的民主实质上是服务于少数人。

  14. American Culture Reflected in American English

    Institute of Scientific and Technical Information of China (English)



    Language is a vehicle for culture. It is also a key component of culture. It not only reflects culture but also influences culture. As a variety of British English, American English, especially American words and expressions can reflect American culture from many aspects. This paper studies some typical traits of American culture reflected in words and expressions of American Eng-lish.

  15. The Function of Native American Storytelling as Means of Education in Luci Tapahonso's Selected Poems (United States)

    Saddam, Widad Allawi; Ya, Wan Roselezam Wan


    Native American storytelling has become a very vital issue in education. It preserves Native American history for the next generation and teaches them important lessons about the Native American culture. It also conveys moral meanings, knowledge and social values of the Native American people to the universe. More importantly, Native American…

  16. Destruction of the galactic globular cluster system

    CERN Document Server

    Gnedin, O Y; Gnedin, Oleg Y; Ostriker, Jeremiah P


    We investigate the dynamical evolution of the Galactic Globular Cluster System in considerably greater detail than has been done hitherto, finding that destruction rates are significantly larger than given by previous estimates. More than half of the present clusters (52%-58% for the OC galactic model, and 75%-86% for the BSS model) will be destroyed in the next Hubble time. For the evolution of individual clusters we use a Fokker-Planck code including two-body relaxation, tidal truncation of clusters, compressive gravitational shocks while clusters pass through the Galactic disk, and tidal shocks due to passage close to the bulge. Gravitational shocks are treated comprehensively, using a recent result by Kundic & Ostriker (1995) that the shock-induced relaxation term, driving an additional dispersion of energies, is generally more important than the usual energy shift term. We discuss some implications for a past history of the Globular Cluster System, and the initial distribution of the destruction time...

  17. Photometric Properties of Poor Cluster Galaxies (United States)

    Sharma, M.; Prabhu, T. P.


    We study several statistical properties of galaxies in four poor clusters of galaxies using multi-color optical photometry obtained at the Vainu Bappu Telescope, India. The clusters, selected from the EMSS Catalog, are at moderate redshifts (0.08 composite luminosity functions (LFs) in B, V, and R bands are flat at the faint end, similar to the V-band LF derived by Yamagata & Maehara for other (MKW/AWM) poor clusters but steeper than the R-band field LF derived by Lin et al. In terms of the statistical properties of their member galaxies, poor clusters appear to be lower-mass extensions of their rich counterparts. The brightest galaxies of three of these poor clusters appear to be luminous ellipticals with no incontrovertible signatures of a halo. It is likely that they were formed from multiple mergers early in the history of the clusters.

  18. American Connections

    DEFF Research Database (Denmark)

    Petersen, Anne Ring


    The Danish artist Thomas Bang spent his early years in the USA. The works he created in this formative period were thus profoundly shaped by the contemporary movements in American art of the 1960s and 1970s when sculpture, or to be more precise, three-dimensional work became a hotbed of expansive...... experiments. This article traces how Bang made a radical move from painting to sculpture, which was characteristic of that time, and how he developed his artistic idiom by taking an active part in some of the seminal new departures in American art, in particular process art and post-minimalism. By leaping...... to the lasting impact of Bang's American period, which remains the key to understanding his works....

  19. Consonant Cluster Reduction in Tejano English. (United States)

    Bayley, Robert


    Examines the process of consonant cluster reduction in the English of residents of a San Antonio, Texas, "barrio." The author compares Tejano patterns of "/-t,d/" deletion with the pan-English pattern. Results suggest a pattern of convergence and divergence. The study shows that Mexican American English exhibits regional and…

  20. Hierarchical Clustering and Active Galaxies

    CERN Document Server

    Hatziminaoglou, E; Manrique, A


    The growth of Super Massive Black Holes and the parallel development of activity in galactic nuclei are implemented in an analytic code of hierarchical clustering. The evolution of the luminosity function of quasars and AGN will be computed with special attention paid to the connection between quasars and Seyfert galaxies. One of the major interests of the model is the parallel study of quasar formation and evolution and the History of Star Formation.