Professors are usually categorized as "ordinario" or "concursado" (tenured, selected by a jury composed of tenured professors or other reputed authorities on the subject, after a selection process involving academic background evaluation and a public dissertation), "interino" (non-tenure, but stable position, the professor is proposed by the director of the corresponding department – sometimes after different selection processes – and accepted by the Consejo Directivo of the corresponding school), or "suplente" (substitute, hired through the same process as interinos).
 In most cases, classes are taught by a professorial team (a "cátedra", chair), formed by one or two professors and auxiliars, which generally also functions as a research team.
 Regardless of the rank, professors in public universities (and in many private ones) must perform research.
 This ranking system is the one used at the Universidad de Buenos Aires (the largest Argentine university) and by most of the public universities, but not all of them; being autonomous, they can choose their own scale.
 Private universities have their own rank in each case, sometimes based on the public university system, although as a general rule they have less ranks or hold a higher ranking as the starting point for a teaching career (devoting auxiliar ranks to undergraduates).
Joseph-Achille Mbembe, known as Achille Mbembe (born 1957), is a Cameroonian philosopher, political theorist, and public intellectual.
 He was born near Otélé in French Cameroons in 1957.
 He obtained his Ph.D. in history at the University of Sorbonne in Paris, France, in 1989.
 He subsequently obtained a D.E.A. in political science at the Institut d’Etudes Politiques in the same city.
 He has held appointments at Columbia University in New York, Brookings Institution in Washington, D.C., University of Pennsylvania, University of California, Berkeley, Yale University, Duke University and Council for the Development of Social Science Research in Africa (CODESRIA) in Dakar, Senegal.
 He was Assistant Professor of History at Columbia University, New York, from 1988-1991, a Senior Research Fellow at the Brookings Institution in Washington, D.C., from 1991 to 1992, Associate Professor of History at the University of Pennsylvania from 1992 to 1996, Executive Director of the Council for the Development of Social Science Research in Africa (Codesria) in Dakar, Senegal, from 1996 to 2000.
 Achille was also a visiting Professor at the University of California, Berkeley, in 2001, and a visiting Professor at Yale University in 2003.
 He is currently a Research Professor in History and Politics at Harvard University's W.E.B. Dubois Research Institute.
The University of Craiova (Romanian: "Universitatea din Craiova" ) is a public university located in Craiova, Romania.
 Founded in 1947, with 4 institutes at the beginning, in the Palace of Justice of Craiova.
 It is the largest university in the historical Oltenia province of Romania.
 It was the last university established in the Kingdom of Romania.
 It was the fifth university in Romania officially approved by the Ministerial Council of the Socialist Republic of Romania in 1965, with 7 faculties: Mathematics, Philology, Electrotechnics, Agriculture, Horticulture, Chemistry and Economics.
 The university is a member of the European University Association.
 It currently includes a total of 16 faculties and 2 colleges for undergraduate and postgraduate programms.
 Professor Cezar Ionuț Spînu is the University's 13th Rector since 2016.
 The university is governed by a 7-member Vice-Rector Board.
 The university is internationally known by its football club FC Universitatea Craiova.
Haywood Jefferson Powell (born April 25, 1954) is a law professor at Duke University.
 Before his return to Duke, he served in the Office of Legal Council at the United States Justice Department in Washington, D.C. Before this second tenure in the Justice Department, Powell was the Lyle T. Alverson Professor of Law at The George Washington University in Washington, D.C., a post which he accepted in 2010.
 Before joining The George Washington University Law Faculty, Powell had been a professor of Law at Duke University since 1987.
 In 1999 the Duke Bar Association presented Powell with the "Excellence in Small Section Teaching" Award, and in the academic year 2001–2002, he was Duke University's "Scholar/Teacher of the year".
 More recently, he has been named Frederic Cleaveland Professor of Law and Divinity.
 Powell is currently the Samuel Rubin Visiting Professor of Law at Columbia Law School, where he teaches constitutional law.
Vijaya Lakshmi Melnick (born November 19, 1937) is an India-born American academic specializing in biological and environmental sciences and immunology.
 She is Professor Emeritus of Biological and Environmental Sciences at the University of the District of Columbia.
 She was the First Vice President and then Co-President of the International Health Awareness Network, an affiliate of the United Nations.
 She holds memberships on the boards and executive committees of national and international organizations related to either health and education or both.
 She has written several research papers and books.
The University of Washington Bothell (UW Bothell) is a four-year undergraduate and graduate campus in northeast King County, one of the three campuses of the public University of Washington.
 The campus was established in 1990 (which is the same year the University of Washington Tacoma opened).
 UW Bothell shares a campus with Cascadia College.
 UW Bothell is the largest branch campus in the state and the fastest growing four-year university in the state of Washington.
 In 2014 and 2015, Money Magazine ranked UW Bothell as the best university in Washington state in terms of value and quality.
 In the same study, UW Bothell ranked 10th nationally among public universities and 36th overall.
Gerard Casey (born 1951) is a Professor "Emeritus" at the University College Dublin.
 He holds law degrees from the University of London and UCD as well as a primary degree in philosophy from University College Cork, an MA and PhD from the University of Notre Dame and the higher doctorate, DLitt, from the National University of Ireland.
 He was formerly Assistant Professor at The Catholic University of America (Washington, D.C.), 1983-1986 and Adjunct Professor at the Pontifical Institute in Washington D.C., 1984-86.
 He also was a member of the School of Philosophy in University College Dublin (UCD) (Head from 2001–2006) until he retired in December 2015.
 He has a Fellowship at Mises UK and an Associated Scholarship at the Ludwig von Mises Institute in Auburn, Alabama.
Washington State University Tri-Cities is a campus in the Washington State University system along the Columbia River in northern Richland, Washington.
 With upper division and graduate programs, WSU Tri-Cities offers 20 baccalaureate, 17 master’s, and 14 doctoral degree programs.
 The campus added freshman and sophomore courses in fall 2007 to become a true four-year public university, extending the WSU land-grant mission of providing affordable, accessible higher education.
 WSU Tri-Cities has strong community support and partnerships, particularly with the nearby Pacific Northwest National Laboratory.
 WSU Tri-Cities also partners with the Miss Tri-Cities Organization, offering a $1,000 scholarship to Miss Tri-Cities in 2010.
The University of the District of Columbia (UDC) is the only public university in the U.S. capital of Washington, D.C. UDC is one of the few urban land-grant universities in the country and a member school of the Thurgood Marshall College Fund.
The University of Maryland, Baltimore County (often referred to as UMBC) is an American public research university, located in Baltimore County, Maryland, United States, mostly in the community of Catonsville, approximately 10 minutes (8.3 miles) from downtown Baltimore City, 9 minutes (6.1 miles) from Baltimore–Washington International Airport (BWI).
 With a fall 2016 enrollment of 13,640 students, 48 undergraduate majors, over 60 graduate programs (36 master, 24 doctoral, and 17 graduate certificate programs) and the first university research park in Maryland, UMBC has been named the #1 Up-and-Coming University for six years in a row, since 2009, by "US News & World Report".
 In addition, "US News & World Report" has placed UMBC in the top ten for best undergraduate teaching six years in a row, being placed at #5, the second highest-ranked public university.

Question: Vijaya Melnick is a professor at what public university in Washington, D.C.?
Answer: The University of the District of Columbia