Showing 1761 - 1770 of 2039 Items
Role of iron and organic carbon in mass-specific light absorption by particulate matter from louisiana coastal waters
Date: 2012-01-01
Creator: Margaret L. Estapa
Emmanuel Boss
Lawrence M. Mayer
Collin S. Roesler
Access: Open access
- We investigated the influences of organic content and mineralogical composition on light absorption by mostly mineral suspended particles in aquatic and coastal marine systems. Mass-specific absorption spectra of suspended particles and surface sediments from coastal Louisiana and the lower Mississippi and Atchafalaya rivers were measured with a centered sample-mount integrating sphere and analyzed in conjunction with organic carbon (OC), hydrochloric acid- (HCl-) extractable iron, and dithionite-extractable iron contents. Compositions and absorption properties were comparable to published values for similar particles. Dithionite-extractable iron was strongly correlated with absorption at ultraviolet (UV) and blue wavelengths, while OC and HCl-extractable iron were weakly but positively correlated. Oxidative removal of OC from sediments caused small and variable changes in absorption, while dithionite extraction of iron oxides strongly reduced absorption. Shoulders in the absorption spectra corresponded to absorption bands of iron oxide minerals, and their intensities were well correlated to dithionite-extractable iron contents of the samples. These findings support a primary role for iron oxide and hydroxide minerals in the mass-specific absorption of mostly inorganic particles from the terrestrially influenced coast of Louisiana. Riverine particles had higher dithionite-extractable iron contents and iron oxide- specific absorption features than did marine particles, consistent with current knowledge regarding differential transport of particulate iron oxides and hydroxides through estuarine salinity gradients and reductive alteration of these oxide phases on the Louisiana shelf. The quantifiable dependence of UV absorption features on iron oxide content suggests that, under certain conditions, in situ hyperspectral absorption measurements could be designed to monitor water-column iron mineral transport and transformation. © 2012, by the Association for the Sciences of Limnology and Oceanography, Inc.
Accounting for creativity: Lessons from the economic history of intellectual property and innovation
Date: 2020-01-01
Creator: B. Zorina Khan
Access: Open access
- Social progress depends on the realization of inventive ideas, and economic history provides valuable lessons about creativity in technology and culture. The empirical study of over one hundred thousand innovative individuals who obtained patents, copyrights, and prizes, sheds light on the relationship between institutions, incentives, and transformative ideas and expression, over the past two centuries. The European growth model assumed useful knowledge was scarce, and top-down administered innovation systems offered rights and rewards to “exclusive” groups. By contrast, American policies regarded creativity as widely distributed in the general population, and further promoted “inclusive” market-oriented mechanisms that fostered diversity in ideas and outcomes. The evidence suggests that property rights in patents facilitated markets in ideas, and ensured that returns were aligned with productivity and market demand. Whereas, such administered systems as innovation prizes and publisher’s copyrights in the “creative industries” benefited the few rather than overall social welfare.
Statement by Douglas Chapman collected by Erika Bjorum on August 9, 2023
Date: 2023-08-09
Creator: Douglas Chapman
Access: Open access
- This statement was given privately.
Interview with Colleen Quint by Andrea L’Hommedieu
Date: 2008-03-06
Creator: Colleen Quint
Access: Open access
- Biographical NoteColleen Quint was born on September 22, 1963. She grew up in Portland, Maine, attended Deering High School, and Bates College, graduating in 1985. She first met Senator Mitchell in the fall of 1985 while working as an intern in his Washington, D.C. office. She worked at the Christian Science Monitor for three years as editor for Western Europe and Great Britain, then returned to Maine for law school and practiced law for ten years. She is married to Bill Hiss, who was involved in the founding of the Mitchell Institute. At the time of this interview she was executive director of the Mitchell Institute. SummaryInterview includes discussion of: family and educational background; growing up in Portland, Maine; working as an intern in Senator Mitchell’s office in Washington D.C.; Samantha Smith legislation; working for the Christian Science Monitor; clerkship with Thomas Delahanty; Attorney General’s Office legal work; Bowdoin College fraternity policies; Americans with Disabilities Act [ADA]; the creation of the Mitchell Institute; running into George Mitchell at the airport and his great memory; the environment that many Mitchell Scholars come from; and the development of the Mitchell Institute.
Interview with Heather Mitchell (2) by Brien Williams
Date: 2010-03-02
Creator: Heather M Mitchell
Access: Open access
- Biographical NoteHeather McLachlan Mitchell was born and raised in Montreal, Canada, and lived in Paris, France, for fifteen years. She was assistant to the executive director of the Association of Tennis Professionals and subsequently represented professional male tennis players. She relocated from Paris to New York and in 1993 met George Mitchell at the U.S. Open. The two were married in 1994. She later worked independently coordinating tennis events. Once their children started school, she began working as a literary agent at Gelfman Schneider. SummaryInterview includes discussion of: connections in Maine when growing up in Quebec; visiting Maine with George Mitchell; visiting Maine with their children; Mitchell’s balance between work and family; Mitchell’s contact with support staff from his Senate days; and Mitchell’s house in D.C.
Interview with Christine Williams by Brien Williams
Date: 2008-11-21
Creator: Christine G Williams
Access: Open access
- Biographical NoteChristine G. Williams was born January 20, 1952, in Boston, Massachusetts, to Adelaide and Donald Williams, a Methodist minister. She earned a degree in history from Boston University. As a VISTA volunteer she taught on the Rosebud reservation in South Dakota before returning to New England to teach at Brunswick High School in Brunswick, Maine, for the 1975-1976 school year. Subsequently, after teaching in New Hampshire for four years, she was hired by George Mitchell’s U.S. Senate office in 1982 and worked there until 1994, focusing on health care issues in the latter years. She later went to work for the Agency for Health Care Research and Quality. SummaryInterview includes discussion of: teaching social studies; working for Senator Mitchell; changes when Mitchell became chair of the Health Subcommittee of the Finance Committee; Robert Wood Johnson Fellows and staff in Mitchell’s office; involvement in Health Care Reform and the bill they wrote; changes when Mitchell became Senate majority leader; Clinton’s election and what could have been done better for health reform; the task force on the Clinton health reform bill; work on health care legislation and how the bill was finally defeated; other health legislation; the question of bipartisanship; her wedding; Mitchell’s retirement; appreciation and understanding of Maine people, Maine’s health care; ambience of Mitchell’s office and what it was like working there; Mitchell’s temperament, professionalism, and personality; Mitchell’s contributions to the Senate and leadership; Mitchell’s election to majority leader; involvement with the Mitchell Institute scholarship program; Mitchell and long term care; and federal recognition for the Micmacs.
Interview with Barbara Mikulski by Brien Williams
Date: 2010-05-04
Creator: Barbara A Mikulski
Access: Open access
- Biographical NoteBarbara Ann Mikulski was born on July 20, 1936, and grew up in the Highlandtown neighborhood of East Baltimore, Maryland. She attended Mount Saint Agnes College and received her M.S.W. from the University of Maryland School of Social Work. She became a social worker, community organizer, and Baltimore city councilor, and she made an unsuccessful bid for the U.S. Senate in 1974 before winning election to the U.S. House of Representatives in 1976. After serving in the House for ten years, she ran for the U.S. Senate in 1986, becoming the first elected woman Democratic U.S. senator. She has won numerous re-elections and continued to serve in the Senate as its longest-serving female senator at the time of this interview. SummaryInterview includes discussion of: Mikulski’s run for the Senate in 1986 and Mitchell’s DSCC role in supporting her campaign; Mitchell dancing with Mikulski at a fund raiser; Mikulski’s reception in the Senate as a female senator; Mikulski-Mitchell ‘spousal impoverishment’ amendment; committee assignments during Mikulski’s first term; women in Congress; DSCC Women’s Senate Network; women’s issues worth legislating and fighting for in the Senate; Mitchell’s qualities as a leader; common constituent interests among ‘coastal senators;’ NAFTA; how Mitchell related to women; Mikulski’s reaction to Mitchell’s retirement from the Senate; Mitchell’s legacy as Senate leader.
Interview with Dan Wathen by Andrea L’Hommedieu
Date: 2009-09-29
Creator: Daniel 'Dan' E Wathen
Access: Open access
- Biographical NoteDaniel E. "Dan" Wathen was born November 4, 1939, in Easton, Maine, to Wilda (Persis) and Joseph Jackson Wathen. He was graduated from Easton High School and Ricker College in Houlton, Maine (1962), the University of Maine School of Law (1965), and the University of Virginia School of Law (1988). He was appointed to the Maine Superior Court by Governor James B. Longley and served there for four years. He was then appointed justice to the Maine Supreme Judicial Court by Governor John McKernan. He served as justice for ten years, then chief justice for ten more years. Justice Wathen retired from the bench in 2001 and subsequently joined Pierce-Atwood law firm in Portland, Maine. SummaryInterview includes discussion of: Dan Wathen’s legal career; practicing law in Augusta; becoming acquainted with George Mitchell through his practice in Maine; his parents’ recollections of George Mitchell; first impression upon meeting Mitchell; Freddy Vahlsing and sugar beet project; Mitchell’s 1974 gubernatorial campaign against James B. Longley; Wathen’s inspiration to be a judge; Mitchell’s judicial temperament; Mitchell’s diplomatic role; and the Mitchell Institute.
Interview with Bob Lenna by Andrea L’Hommedieu
Date: 2009-09-14
Creator: Robert 'Bob' O Lenna
Access: Open access
- Biographical NoteRobert Oscar “Bob” Lenna was born in Jamestown, New York, in 1945 to Harry Albert and Babette (Simon) Lenna. He received his undergraduate degree in American studies and his graduate degree in American and New England studies at the University of Southern Maine. In 1970, he worked on the staff of Senator Charles Goodell of New York, then moved to Maine and was hired for a position on George Mitchell’s staff when Mitchell announced his run for U.S. Senate. He later worked for Libby Mitchell. SummaryInterview includes discussion of: family and educational background; working on Mitchell’s 1974 gubernatorial campaign; Lenna’s motivations to get involved in politics in the 1970s; Lenna’s impressions of why Mitchell lost the 1974 campaign; difference Lenna noticed between Mitchell’s 1974 and 1982 campaigns; Mitchell’s legacy; Mitchell’s reaction to Nixon’s pardon; and Libby Mitchell’s career.