19 results
Exchange on dynamic encounter networks allows plant mitochondria to collect complete sets of mitochondrial DNA products despite their incomplete genomes
- Konstantinos Giannakis, Joanna M. Chustecki, Iain G. Johnston
-
- Journal:
- Quantitative Plant Biology / Volume 3 / 2022
- Published online by Cambridge University Press:
- 09 September 2022, e18
-
- Article
-
- You have access Access
- Open access
- HTML
- Export citation
-
Mitochondria in plant cells usually contain less than a full copy of the mitochondrial DNA (mtDNA) genome. Here, we asked whether mitochondrial dynamics may allow individual mitochondria to ‘collect’ a full set of mtDNA-encoded gene products over time, by facilitating exchange between individuals akin to trade on a social network. We characterise the collective dynamics of mitochondria in Arabidopsis hypocotyl cells using a recent approach combining single-cell time-lapse microscopy, video analysis and network science. We use a quantitative model to predict the capacity for sharing genetic information and gene products through the networks of encounters between mitochondria. We find that biological encounter networks support the emergence of gene product sets over time more readily than a range of other possible network structures. Using results from combinatorics, we identify the network statistics that determine this propensity, and discuss how features of mitochondrial dynamics observed in biology facilitate the collection of mtDNA-encoded gene products.
What is quantitative plant biology?
- Daphné Autran, George W. Bassel, Eunyoung Chae, Daphne Ezer, Ali Ferjani, Christian Fleck, Olivier Hamant, Félix P. Hartmann, Yuling Jiao, Iain G. Johnston, Dorota Kwiatkowska, Boon L. Lim, Ari Pekka Mahönen, Richard J. Morris, Bela M. Mulder, Naomi Nakayama, Ross Sozzani, Lucia C. Strader, Kirsten ten Tusscher, Minako Ueda, Sebastian Wolf
-
- Journal:
- Quantitative Plant Biology / Volume 2 / 2021
- Published online by Cambridge University Press:
- 20 May 2021, e10
-
- Article
-
- You have access Access
- Open access
- HTML
- Export citation
-
Quantitative plant biology is an interdisciplinary field that builds on a long history of biomathematics and biophysics. Today, thanks to high spatiotemporal resolution tools and computational modelling, it sets a new standard in plant science. Acquired data, whether molecular, geometric or mechanical, are quantified, statistically assessed and integrated at multiple scales and across fields. They feed testable predictions that, in turn, guide further experimental tests. Quantitative features such as variability, noise, robustness, delays or feedback loops are included to account for the inner dynamics of plants and their interactions with the environment. Here, we present the main features of this ongoing revolution, through new questions around signalling networks, tissue topology, shape plasticity, biomechanics, bioenergetics, ecology and engineering. In the end, quantitative plant biology allows us to question and better understand our interactions with plants. In turn, this field opens the door to transdisciplinary projects with the society, notably through citizen science.
Glucose uptake by the brain on chronic high-protein weight-loss diets with either moderate or low amounts of carbohydrate
- Gerald E. Lobley, Alexandra M. Johnstone, Claire Fyfe, Graham W. Horgan, Grietje Holtrop, David M. Bremner, Iain Broom, Lutz Schweiger, Andy Welch
-
- Journal:
- British Journal of Nutrition / Volume 111 / Issue 4 / 28 February 2014
- Published online by Cambridge University Press:
- 05 September 2013, pp. 586-597
- Print publication:
- 28 February 2014
-
- Article
-
- You have access Access
- HTML
- Export citation
-
Previous work has shown that hunger and food intake are lower in individuals on high-protein (HP) diets when combined with low carbohydrate (LC) intakes rather than with moderate carbohydrate (MC) intakes and where a more ketogenic state occurs. The aim of the present study was to investigate whether the difference between HPLC and HPMC diets was associated with changes in glucose and ketone body metabolism, particularly within key areas of the brain involved in appetite control. A total of twelve men, mean BMI 34·9 kg/m2, took part in a randomised cross-over trial, with two 4-week periods when isoenergetic fixed-intake diets (8·3 MJ/d) were given, with 30 % of the energy being given as protein and either (1) a very LC (22 g/d; HPLC) or (2) a MC (182 g/d; HPMC) intake. An 18fluoro-deoxyglucose positron emission tomography scan of the brain was conducted at the end of each dietary intervention period, following an overnight fast (n 4) or 4 h after consumption of a test meal (n 8). On the next day, whole-body ketone and glucose metabolism was quantified using [1,2,3,4-13C]acetoacetate, [2,4-13C]3-hydroxybutyrate and [6,6-2H2]glucose. The composite hunger score was 14 % lower (P= 0·013) for the HPLC dietary intervention than for the HPMC diet. Whole-body ketone flux was approximately 4-fold greater for the HPLC dietary intervention than for the HPMC diet (P< 0·001). The 9-fold difference in carbohydrate intakes between the HPLC and HPMC dietary interventions led to a 5 % lower supply of glucose to the brain. Despite this, the uptake of glucose by the fifty-four regions of the brain analysed remained similar for the two dietary interventions. In conclusion, differences in the composite hunger score observed for the two dietary interventions are not associated with the use of alternative fuels by the brain.
Contributors
-
- By Rose Teteki Abbey, K. C. Abraham, David Tuesday Adamo, LeRoy H. Aden, Efrain Agosto, Victor Aguilan, Gillian T. W. Ahlgren, Charanjit Kaur AjitSingh, Dorothy B E A Akoto, Giuseppe Alberigo, Daniel E. Albrecht, Ruth Albrecht, Daniel O. Aleshire, Urs Altermatt, Anand Amaladass, Michael Amaladoss, James N. Amanze, Lesley G. Anderson, Thomas C. Anderson, Victor Anderson, Hope S. Antone, María Pilar Aquino, Paula Arai, Victorio Araya Guillén, S. Wesley Ariarajah, Ellen T. Armour, Brett Gregory Armstrong, Atsuhiro Asano, Naim Stifan Ateek, Mahmoud Ayoub, John Alembillah Azumah, Mercedes L. García Bachmann, Irena Backus, J. Wayne Baker, Mieke Bal, Lewis V. Baldwin, William Barbieri, António Barbosa da Silva, David Basinger, Bolaji Olukemi Bateye, Oswald Bayer, Daniel H. Bays, Rosalie Beck, Nancy Elizabeth Bedford, Guy-Thomas Bedouelle, Chorbishop Seely Beggiani, Wolfgang Behringer, Christopher M. Bellitto, Byard Bennett, Harold V. Bennett, Teresa Berger, Miguel A. Bernad, Henley Bernard, Alan E. Bernstein, Jon L. Berquist, Johannes Beutler, Ana María Bidegain, Matthew P. Binkewicz, Jennifer Bird, Joseph Blenkinsopp, Dmytro Bondarenko, Paulo Bonfatti, Riet en Pim Bons-Storm, Jessica A. Boon, Marcus J. Borg, Mark Bosco, Peter C. Bouteneff, François Bovon, William D. Bowman, Paul S. Boyer, David Brakke, Richard E. Brantley, Marcus Braybrooke, Ian Breward, Ênio José da Costa Brito, Jewel Spears Brooker, Johannes Brosseder, Nicholas Canfield Read Brown, Robert F. Brown, Pamela K. Brubaker, Walter Brueggemann, Bishop Colin O. Buchanan, Stanley M. Burgess, Amy Nelson Burnett, J. Patout Burns, David B. Burrell, David Buttrick, James P. Byrd, Lavinia Byrne, Gerado Caetano, Marcos Caldas, Alkiviadis Calivas, William J. Callahan, Salvatore Calomino, Euan K. Cameron, William S. Campbell, Marcelo Ayres Camurça, Daniel F. Caner, Paul E. Capetz, Carlos F. Cardoza-Orlandi, Patrick W. Carey, Barbara Carvill, Hal Cauthron, Subhadra Mitra Channa, Mark D. Chapman, James H. Charlesworth, Kenneth R. Chase, Chen Zemin, Luciano Chianeque, Philip Chia Phin Yin, Francisca H. Chimhanda, Daniel Chiquete, John T. Chirban, Soobin Choi, Robert Choquette, Mita Choudhury, Gerald Christianson, John Chryssavgis, Sejong Chun, Esther Chung-Kim, Charles M. A. Clark, Elizabeth A. Clark, Sathianathan Clarke, Fred Cloud, John B. Cobb, W. Owen Cole, John A Coleman, John J. Collins, Sylvia Collins-Mayo, Paul K. Conkin, Beth A. Conklin, Sean Connolly, Demetrios J. Constantelos, Michael A. Conway, Paula M. Cooey, Austin Cooper, Michael L. Cooper-White, Pamela Cooper-White, L. William Countryman, Sérgio Coutinho, Pamela Couture, Shannon Craigo-Snell, James L. Crenshaw, David Crowner, Humberto Horacio Cucchetti, Lawrence S. Cunningham, Elizabeth Mason Currier, Emmanuel Cutrone, Mary L. Daniel, David D. Daniels, Robert Darden, Rolf Darge, Isaiah Dau, Jeffry C. Davis, Jane Dawson, Valentin Dedji, John W. de Gruchy, Paul DeHart, Wendy J. Deichmann Edwards, Miguel A. De La Torre, George E. Demacopoulos, Thomas de Mayo, Leah DeVun, Beatriz de Vasconcellos Dias, Dennis C. Dickerson, John M. Dillon, Luis Miguel Donatello, Igor Dorfmann-Lazarev, Susanna Drake, Jonathan A. Draper, N. Dreher Martin, Otto Dreydoppel, Angelyn Dries, A. J. Droge, Francis X. D'Sa, Marilyn Dunn, Nicole Wilkinson Duran, Rifaat Ebied, Mark J. Edwards, William H. Edwards, Leonard H. Ehrlich, Nancy L. Eiesland, Martin Elbel, J. Harold Ellens, Stephen Ellingson, Marvin M. Ellison, Robert Ellsberg, Jean Bethke Elshtain, Eldon Jay Epp, Peter C. Erb, Tassilo Erhardt, Maria Erling, Noel Leo Erskine, Gillian R. Evans, Virginia Fabella, Michael A. Fahey, Edward Farley, Margaret A. Farley, Wendy Farley, Robert Fastiggi, Seena Fazel, Duncan S. Ferguson, Helwar Figueroa, Paul Corby Finney, Kyriaki Karidoyanes FitzGerald, Thomas E. FitzGerald, John R. Fitzmier, Marie Therese Flanagan, Sabina Flanagan, Claude Flipo, Ronald B. Flowers, Carole Fontaine, David Ford, Mary Ford, Stephanie A. Ford, Jim Forest, William Franke, Robert M. Franklin, Ruth Franzén, Edward H. Friedman, Samuel Frouisou, Lorelei F. Fuchs, Jojo M. Fung, Inger Furseth, Richard R. Gaillardetz, Brandon Gallaher, China Galland, Mark Galli, Ismael García, Tharscisse Gatwa, Jean-Marie Gaudeul, Luis María Gavilanes del Castillo, Pavel L. Gavrilyuk, Volney P. Gay, Metropolitan Athanasios Geevargis, Kondothra M. George, Mary Gerhart, Simon Gikandi, Maurice Gilbert, Michael J. Gillgannon, Verónica Giménez Beliveau, Terryl Givens, Beth Glazier-McDonald, Philip Gleason, Menghun Goh, Brian Golding, Bishop Hilario M. Gomez, Michelle A. Gonzalez, Donald K. Gorrell, Roy Gottfried, Tamara Grdzelidze, Joel B. Green, Niels Henrik Gregersen, Cristina Grenholm, Herbert Griffiths, Eric W. Gritsch, Erich S. Gruen, Christoffer H. Grundmann, Paul H. Gundani, Jon P. Gunnemann, Petre Guran, Vidar L. Haanes, Jeremiah M. Hackett, Getatchew Haile, Douglas John Hall, Nicholas Hammond, Daphne Hampson, Jehu J. Hanciles, Barry Hankins, Jennifer Haraguchi, Stanley S. Harakas, Anthony John Harding, Conrad L. Harkins, J. William Harmless, Marjory Harper, Amir Harrak, Joel F. Harrington, Mark W. Harris, Susan Ashbrook Harvey, Van A. Harvey, R. Chris Hassel, Jione Havea, Daniel Hawk, Diana L. Hayes, Leslie Hayes, Priscilla Hayner, S. Mark Heim, Simo Heininen, Richard P. Heitzenrater, Eila Helander, David Hempton, Scott H. Hendrix, Jan-Olav Henriksen, Gina Hens-Piazza, Carter Heyward, Nicholas J. Higham, David Hilliard, Norman A. Hjelm, Peter C. Hodgson, Arthur Holder, M. Jan Holton, Dwight N. Hopkins, Ronnie Po-chia Hsia, Po-Ho Huang, James Hudnut-Beumler, Jennifer S. Hughes, Leonard M. Hummel, Mary E. Hunt, Laennec Hurbon, Mark Hutchinson, Susan E. Hylen, Mary Beth Ingham, H. Larry Ingle, Dale T. Irvin, Jon Isaak, Paul John Isaak, Ada María Isasi-Díaz, Hans Raun Iversen, Margaret C. Jacob, Arthur James, Maria Jansdotter-Samuelsson, David Jasper, Werner G. Jeanrond, Renée Jeffery, David Lyle Jeffrey, Theodore W. Jennings, David H. Jensen, Robin Margaret Jensen, David Jobling, Dale A. Johnson, Elizabeth A. Johnson, Maxwell E. Johnson, Sarah Johnson, Mark D. Johnston, F. Stanley Jones, James William Jones, John R. Jones, Alissa Jones Nelson, Inge Jonsson, Jan Joosten, Elizabeth Judd, Mulambya Peggy Kabonde, Robert Kaggwa, Sylvester Kahakwa, Isaac Kalimi, Ogbu U. Kalu, Eunice Kamaara, Wayne C. Kannaday, Musimbi Kanyoro, Veli-Matti Kärkkäinen, Frank Kaufmann, Léon Nguapitshi Kayongo, Richard Kearney, Alice A. Keefe, Ralph Keen, Catherine Keller, Anthony J. Kelly, Karen Kennelly, Kathi Lynn Kern, Fergus Kerr, Edward Kessler, George Kilcourse, Heup Young Kim, Kim Sung-Hae, Kim Yong-Bock, Kim Yung Suk, Richard King, Thomas M. King, Robert M. Kingdon, Ross Kinsler, Hans G. Kippenberg, Cheryl A. Kirk-Duggan, Clifton Kirkpatrick, Leonid Kishkovsky, Nadieszda Kizenko, Jeffrey Klaiber, Hans-Josef Klauck, Sidney Knight, Samuel Kobia, Robert Kolb, Karla Ann Koll, Heikki Kotila, Donald Kraybill, Philip D. W. Krey, Yves Krumenacker, Jeffrey Kah-Jin Kuan, Simanga R. Kumalo, Peter Kuzmic, Simon Shui-Man Kwan, Kwok Pui-lan, André LaCocque, Stephen E. Lahey, John Tsz Pang Lai, Emiel Lamberts, Armando Lampe, Craig Lampe, Beverly J. Lanzetta, Eve LaPlante, Lizette Larson-Miller, Ariel Bybee Laughton, Leonard Lawlor, Bentley Layton, Robin A. Leaver, Karen Lebacqz, Archie Chi Chung Lee, Marilyn J. Legge, Hervé LeGrand, D. L. LeMahieu, Raymond Lemieux, Bill J. Leonard, Ellen M. Leonard, Outi Leppä, Jean Lesaulnier, Nantawan Boonprasat Lewis, Henrietta Leyser, Alexei Lidov, Bernard Lightman, Paul Chang-Ha Lim, Carter Lindberg, Mark R. Lindsay, James R. Linville, James C. Livingston, Ann Loades, David Loades, Jean-Claude Loba-Mkole, Lo Lung Kwong, Wati Longchar, Eleazar López, David W. Lotz, Andrew Louth, Robin W. Lovin, William Luis, Frank D. Macchia, Diarmaid N. J. MacCulloch, Kirk R. MacGregor, Marjory A. MacLean, Donald MacLeod, Tomas S. Maddela, Inge Mager, Laurenti Magesa, David G. Maillu, Fortunato Mallimaci, Philip Mamalakis, Kä Mana, Ukachukwu Chris Manus, Herbert Robinson Marbury, Reuel Norman Marigza, Jacqueline Mariña, Antti Marjanen, Luiz C. L. Marques, Madipoane Masenya (ngwan'a Mphahlele), Caleb J. D. Maskell, Steve Mason, Thomas Massaro, Fernando Matamoros Ponce, András Máté-Tóth, Odair Pedroso Mateus, Dinis Matsolo, Fumitaka Matsuoka, John D'Arcy May, Yelena Mazour-Matusevich, Theodore Mbazumutima, John S. McClure, Christian McConnell, Lee Martin McDonald, Gary B. McGee, Thomas McGowan, Alister E. McGrath, Richard J. McGregor, John A. McGuckin, Maud Burnett McInerney, Elsie Anne McKee, Mary B. McKinley, James F. McMillan, Ernan McMullin, Kathleen E. McVey, M. Douglas Meeks, Monica Jyotsna Melanchthon, Ilie Melniciuc-Puica, Everett Mendoza, Raymond A. Mentzer, William W. Menzies, Ina Merdjanova, Franziska Metzger, Constant J. Mews, Marvin Meyer, Carol Meyers, Vasile Mihoc, Gunner Bjerg Mikkelsen, Maria Inêz de Castro Millen, Clyde Lee Miller, Bonnie J. Miller-McLemore, Alexander Mirkovic, Paul Misner, Nozomu Miyahira, R. W. L. Moberly, Gerald Moede, Aloo Osotsi Mojola, Sunanda Mongia, Rebeca Montemayor, James Moore, Roger E. Moore, Craig E. Morrison O.Carm, Jeffry H. Morrison, Keith Morrison, Wilson J. Moses, Tefetso Henry Mothibe, Mokgethi Motlhabi, Fulata Moyo, Henry Mugabe, Jesse Ndwiga Kanyua Mugambi, Peggy Mulambya-Kabonde, Robert Bruce Mullin, Pamela Mullins Reaves, Saskia Murk Jansen, Heleen L. Murre-Van den Berg, Augustine Musopole, Isaac M. T. Mwase, Philomena Mwaura, Cecilia Nahnfeldt, Anne Nasimiyu Wasike, Carmiña Navia Velasco, Thulani Ndlazi, Alexander Negrov, James B. Nelson, David G. Newcombe, Carol Newsom, Helen J. Nicholson, George W. E. Nickelsburg, Tatyana Nikolskaya, Damayanthi M. A. Niles, Bertil Nilsson, Nyambura Njoroge, Fidelis Nkomazana, Mary Beth Norton, Christian Nottmeier, Sonene Nyawo, Anthère Nzabatsinda, Edward T. Oakes, Gerald O'Collins, Daniel O'Connell, David W. Odell-Scott, Mercy Amba Oduyoye, Kathleen O'Grady, Oyeronke Olajubu, Thomas O'Loughlin, Dennis T. Olson, J. Steven O'Malley, Cephas N. Omenyo, Muriel Orevillo-Montenegro, César Augusto Ornellas Ramos, Agbonkhianmeghe E. Orobator, Kenan B. Osborne, Carolyn Osiek, Javier Otaola Montagne, Douglas F. Ottati, Anna May Say Pa, Irina Paert, Jerry G. Pankhurst, Aristotle Papanikolaou, Samuele F. Pardini, Stefano Parenti, Peter Paris, Sung Bae Park, Cristián G. Parker, Raquel Pastor, Joseph Pathrapankal, Daniel Patte, W. Brown Patterson, Clive Pearson, Keith F. Pecklers, Nancy Cardoso Pereira, David Horace Perkins, Pheme Perkins, Edward N. Peters, Rebecca Todd Peters, Bishop Yeznik Petrossian, Raymond Pfister, Peter C. Phan, Isabel Apawo Phiri, William S. F. Pickering, Derrick G. Pitard, William Elvis Plata, Zlatko Plese, John Plummer, James Newton Poling, Ronald Popivchak, Andrew Porter, Ute Possekel, James M. Powell, Enos Das Pradhan, Devadasan Premnath, Jaime Adrían Prieto Valladares, Anne Primavesi, Randall Prior, María Alicia Puente Lutteroth, Eduardo Guzmão Quadros, Albert Rabil, Laurent William Ramambason, Apolonio M. Ranche, Vololona Randriamanantena Andriamitandrina, Lawrence R. Rast, Paul L. Redditt, Adele Reinhartz, Rolf Rendtorff, Pål Repstad, James N. Rhodes, John K. Riches, Joerg Rieger, Sharon H. Ringe, Sandra Rios, Tyler Roberts, David M. Robinson, James M. Robinson, Joanne Maguire Robinson, Richard A. H. Robinson, Roy R. Robson, Jack B. Rogers, Maria Roginska, Sidney Rooy, Rev. Garnett Roper, Maria José Fontelas Rosado-Nunes, Andrew C. Ross, Stefan Rossbach, François Rossier, John D. Roth, John K. Roth, Phillip Rothwell, Richard E. Rubenstein, Rosemary Radford Ruether, Markku Ruotsila, John E. Rybolt, Risto Saarinen, John Saillant, Juan Sanchez, Wagner Lopes Sanchez, Hugo N. Santos, Gerhard Sauter, Gloria L. Schaab, Sandra M. Schneiders, Quentin J. Schultze, Fernando F. Segovia, Turid Karlsen Seim, Carsten Selch Jensen, Alan P. F. Sell, Frank C. Senn, Kent Davis Sensenig, Damían Setton, Bal Krishna Sharma, Carolyn J. Sharp, Thomas Sheehan, N. Gerald Shenk, Christian Sheppard, Charles Sherlock, Tabona Shoko, Walter B. Shurden, Marguerite Shuster, B. Mark Sietsema, Batara Sihombing, Neil Silberman, Clodomiro Siller, Samuel Silva-Gotay, Heikki Silvet, John K. Simmons, Hagith Sivan, James C. Skedros, Abraham Smith, Ashley A. Smith, Ted A. Smith, Daud Soesilo, Pia Søltoft, Choan-Seng (C. S.) Song, Kathryn Spink, Bryan Spinks, Eric O. Springsted, Nicolas Standaert, Brian Stanley, Glen H. Stassen, Karel Steenbrink, Stephen J. Stein, Andrea Sterk, Gregory E. Sterling, Columba Stewart, Jacques Stewart, Robert B. Stewart, Cynthia Stokes Brown, Ken Stone, Anne Stott, Elizabeth Stuart, Monya Stubbs, Marjorie Hewitt Suchocki, David Kwang-sun Suh, Scott W. Sunquist, Keith Suter, Douglas Sweeney, Charles H. Talbert, Shawqi N. Talia, Elsa Tamez, Joseph B. Tamney, Jonathan Y. Tan, Yak-Hwee Tan, Kathryn Tanner, Feiya Tao, Elizabeth S. Tapia, Aquiline Tarimo, Claire Taylor, Mark Lewis Taylor, Bishop Abba Samuel Wolde Tekestebirhan, Eugene TeSelle, M. Thomas Thangaraj, David R. Thomas, Andrew Thornley, Scott Thumma, Marcelo Timotheo da Costa, George E. “Tink” Tinker, Ola Tjørhom, Karen Jo Torjesen, Iain R. Torrance, Fernando Torres-Londoño, Archbishop Demetrios [Trakatellis], Marit Trelstad, Christine Trevett, Phyllis Trible, Johannes Tromp, Paul Turner, Robert G. Tuttle, Archbishop Desmond Tutu, Peter Tyler, Anders Tyrberg, Justin Ukpong, Javier Ulloa, Camillus Umoh, Kristi Upson-Saia, Martina Urban, Monica Uribe, Elochukwu Eugene Uzukwu, Richard Vaggione, Gabriel Vahanian, Paul Valliere, T. J. Van Bavel, Steven Vanderputten, Peter Van der Veer, Huub Van de Sandt, Louis Van Tongeren, Luke A. Veronis, Noel Villalba, Ramón Vinke, Tim Vivian, David Voas, Elena Volkova, Katharina von Kellenbach, Elina Vuola, Timothy Wadkins, Elaine M. Wainwright, Randi Jones Walker, Dewey D. Wallace, Jerry Walls, Michael J. Walsh, Philip Walters, Janet Walton, Jonathan L. Walton, Wang Xiaochao, Patricia A. Ward, David Harrington Watt, Herold D. Weiss, Laurence L. Welborn, Sharon D. Welch, Timothy Wengert, Traci C. West, Merold Westphal, David Wetherell, Barbara Wheeler, Carolinne White, Jean-Paul Wiest, Frans Wijsen, Terry L. Wilder, Felix Wilfred, Rebecca Wilkin, Daniel H. Williams, D. Newell Williams, Michael A. Williams, Vincent L. Wimbush, Gabriele Winkler, Anders Winroth, Lauri Emílio Wirth, James A. Wiseman, Ebba Witt-Brattström, Teofil Wojciechowski, John Wolffe, Kenman L. Wong, Wong Wai Ching, Linda Woodhead, Wendy M. Wright, Rose Wu, Keith E. Yandell, Gale A. Yee, Viktor Yelensky, Yeo Khiok-Khng, Gustav K. K. Yeung, Angela Yiu, Amos Yong, Yong Ting Jin, You Bin, Youhanna Nessim Youssef, Eliana Yunes, Robert Michael Zaller, Valarie H. Ziegler, Barbara Brown Zikmund, Joyce Ann Zimmerman, Aurora Zlotnik, Zhuo Xinping
- Edited by Daniel Patte, Vanderbilt University, Tennessee
-
- Book:
- The Cambridge Dictionary of Christianity
- Published online:
- 05 August 2012
- Print publication:
- 20 September 2010, pp xi-xliv
-
- Chapter
- Export citation
Contents
- Edited by Rawi Abdelal, Harvard Business School, Yoshiko M. Herrera, University of Wisconsin, Madison, Alastair Iain Johnston, Harvard University, Massachusetts, Rose McDermott, University of California, Santa Barbara
-
- Book:
- Measuring Identity
- Published online:
- 05 June 2012
- Print publication:
- 06 April 2009, pp v-vi
-
- Chapter
- Export citation
V - EXPERIMENTS
- Edited by Rawi Abdelal, Harvard Business School, Yoshiko M. Herrera, University of Wisconsin, Madison, Alastair Iain Johnston, Harvard University, Massachusetts, Rose McDermott, University of California, Santa Barbara
-
- Book:
- Measuring Identity
- Published online:
- 05 June 2012
- Print publication:
- 06 April 2009, pp 343-344
-
- Chapter
- Export citation
II - SURVEY METHODS
- Edited by Rawi Abdelal, Harvard Business School, Yoshiko M. Herrera, University of Wisconsin, Madison, Alastair Iain Johnston, Harvard University, Massachusetts, Rose McDermott, University of California, Santa Barbara
-
- Book:
- Measuring Identity
- Published online:
- 05 June 2012
- Print publication:
- 06 April 2009, pp 111-112
-
- Chapter
- Export citation
IV - DISCOURSE ANALYSIS AND ETHNOGRAPHY
- Edited by Rawi Abdelal, Harvard Business School, Yoshiko M. Herrera, University of Wisconsin, Madison, Alastair Iain Johnston, Harvard University, Massachusetts, Rose McDermott, University of California, Santa Barbara
-
- Book:
- Measuring Identity
- Published online:
- 05 June 2012
- Print publication:
- 06 April 2009, pp 277-278
-
- Chapter
- Export citation
Contributors
- Edited by Rawi Abdelal, Harvard Business School, Yoshiko M. Herrera, University of Wisconsin, Madison, Alastair Iain Johnston, Harvard University, Massachusetts, Rose McDermott, University of California, Santa Barbara
-
- Book:
- Measuring Identity
- Published online:
- 05 June 2012
- Print publication:
- 06 April 2009, pp vii-viii
-
- Chapter
- Export citation
Measuring Identity
- A Guide for Social Scientists
- Edited by Rawi Abdelal, Yoshiko M. Herrera, Alastair Iain Johnston, Rose McDermott
-
- Published online:
- 05 June 2012
- Print publication:
- 06 April 2009
-
The concept of identity has become increasingly prominent in the social sciences and humanities. Analysis of the development of social identities is an important focus of scholarly research, and scholars using social identities as the building blocks of social, political, and economic life have attempted to account for a number of discrete outcomes by treating identities as causal factors. The dominant implication of the vast literature on identity is that social identities are among the most important social facts of the world in which we live. Abdelal, Herrera, Johnston, and McDermott have brought together leading scholars from a variety of disciplines to consider the conceptual and methodological challenges associated with treating identity as a variable, offer a synthetic theoretical framework, and demonstrate the possibilities offered by various methods of measurement. The book represents a collection of empirically-grounded theoretical discussions of a range of methodological techniques for the study of identities.
I - DEFINITION, CONCEPTUALIZATION, AND MEASUREMENT ALTERNATIVES
- Edited by Rawi Abdelal, Harvard Business School, Yoshiko M. Herrera, University of Wisconsin, Madison, Alastair Iain Johnston, Harvard University, Massachusetts, Rose McDermott, University of California, Santa Barbara
-
- Book:
- Measuring Identity
- Published online:
- 05 June 2012
- Print publication:
- 06 April 2009, pp 15-16
-
- Chapter
- Export citation
1 - Identity as a Variable
- Edited by Rawi Abdelal, Harvard Business School, Yoshiko M. Herrera, University of Wisconsin, Madison, Alastair Iain Johnston, Harvard University, Massachusetts, Rose McDermott, University of California, Santa Barbara
-
- Book:
- Measuring Identity
- Published online:
- 05 June 2012
- Print publication:
- 06 April 2009, pp 17-32
-
- Chapter
- Export citation
-
Summary
For the past two decades, the attention given to the concept of “identity” – both in the social sciences and in the world at large – has continued to rise. Multiple disciplines and subfields are producing an expanding literature on the definition, meaning, and development of ethnic, national, linguistic, religious, gender, class, and other identities and their roles in political, social, and economic outcomes. The ubiquity of identity-based scholarship suggests an emerging realization that identities, as Rogers Smith (2002: 302) has observed, are “among the most normatively significant and behaviorally consequential aspects of politics,” yet the literature has remained diffuse. That is, despite this flurry of activity, the social sciences have not yet witnessed a commensurate rise in definitional consensus on the concept of identity.
The intense interest in scholarship on identity, as well as the many kinds of studies this fascination has spawned, has unfortunately helped undermine the conceptual clarity of identity as a variable. The wide variety of conceptualizations and definitions of identity has led some to conclude that identity is so elusive, slippery, and amorphous that it will never prove to be a useful variable for the social sciences. Rogers Brubaker and Frederick Cooper (2000) have even argued, in the most important critique of identity scholarship to date, that it is time to let go of the concept of identity altogether and to move beyond a scholarly language that they suggest is hopelessly vague and has obscured more than it has revealed.
Bibliography
- Edited by Rawi Abdelal, Harvard Business School, Yoshiko M. Herrera, University of Wisconsin, Madison, Alastair Iain Johnston, Harvard University, Massachusetts, Rose McDermott, University of California, Santa Barbara
-
- Book:
- Measuring Identity
- Published online:
- 05 June 2012
- Print publication:
- 06 April 2009, pp 369-408
-
- Chapter
- Export citation
Introduction
- Edited by Rawi Abdelal, Harvard Business School, Yoshiko M. Herrera, University of Wisconsin, Madison, Alastair Iain Johnston, Harvard University, Massachusetts, Rose McDermott, University of California, Santa Barbara
-
- Book:
- Measuring Identity
- Published online:
- 05 June 2012
- Print publication:
- 06 April 2009, pp 1-14
-
- Chapter
- Export citation
-
Summary
This volume outlines a variety of definitions and methodologies for studying social identities in a diverse set of contexts within American politics, comparative politics, and international relations. As such, we hope it will serve as a primer on the analysis and methodology of identity scholarship for a wide range of interested researchers. Political scientists have long enjoyed access to many excellent guides to mainstream theories and methods, yet those wanting to do research on social identities have had to synthesize enormous literatures on their own, with no practical guide to the alternatives they might employ in their scholarship. This volume aims to be such a road map, both analytically and methodologically. The chapters include a broad array of definitions as well as methodological options available for scholarly research on identity, including methods currently in use and some promising newer ones.
The chapters of this volume demonstrate concretely how to conduct identity research using several different methodological options. Each chapter shows how the ideas that underlie identity are applied in the context of individual research and what sorts of insights such projects can yield. In this way, the combined chapters create a whole greater than the sum of its parts; by aggregating the various specific methodological approaches, the text provides a coherent basis for the general examination of identity in the study of political science.
III - CONTENT ANALYSIS AND COGNITIVE MAPPING
- Edited by Rawi Abdelal, Harvard Business School, Yoshiko M. Herrera, University of Wisconsin, Madison, Alastair Iain Johnston, Harvard University, Massachusetts, Rose McDermott, University of California, Santa Barbara
-
- Book:
- Measuring Identity
- Published online:
- 05 June 2012
- Print publication:
- 06 April 2009, pp 201-202
-
- Chapter
- Export citation
Frontmatter
- Edited by Rawi Abdelal, Harvard Business School, Yoshiko M. Herrera, University of Wisconsin, Madison, Alastair Iain Johnston, Harvard University, Massachusetts, Rose McDermott, University of California, Santa Barbara
-
- Book:
- Measuring Identity
- Published online:
- 05 June 2012
- Print publication:
- 06 April 2009, pp i-iv
-
- Chapter
- Export citation
Index
- Edited by Rawi Abdelal, Harvard Business School, Yoshiko M. Herrera, University of Wisconsin, Madison, Alastair Iain Johnston, Harvard University, Massachusetts, Rose McDermott, University of California, Santa Barbara
-
- Book:
- Measuring Identity
- Published online:
- 05 June 2012
- Print publication:
- 06 April 2009, pp 409-428
-
- Chapter
- Export citation
Identity as a Variable
- Rawi Abdelal, Yoshiko M. Herrera, Alastair Iain Johnston, Rose McDermott
-
- Journal:
- Perspectives on Politics / Volume 4 / Issue 4 / December 2006
- Published online by Cambridge University Press:
- 28 November 2006, pp. 695-711
- Print publication:
- December 2006
-
- Article
- Export citation
-
As scholarly interest in the concept of identity continues to grow, social identities are proving to be crucially important for understanding contemporary life. Despite—or perhaps because of—the sprawl of different treatments of identity in the social sciences, the concept has remained too analytically loose to be as useful a tool as the literature's early promise had suggested. We propose to solve this longstanding problem by developing the analytical rigor and methodological imagination that will make identity a more useful variable for the social sciences. This article offers more precision by defining collective identity as a social category that varies along two dimensions—content and contestation. Content describes the meaning of a collective identity. The content of social identities may take the form of four non-mutually-exclusive types: constitutive norms; social purposes; relational comparisons with other social categories; and cognitive models. Contestation refers to the degree of agreement within a group over the content of the shared category. Our conceptualization thus enables collective identities to be compared according to the agreement and disagreement about their meanings by the members of the group. The final section of the article looks at the methodology of identity scholarship. Addressing the wide array of methodological options on identity—including discourse analysis, surveys, and content analysis, as well as promising newer methods like experiments, agent-based modeling, and cognitive mapping—we hope to provide the kind of brush clearing that will enable the field to move forward methodologically as well.
Rawi Abdelal is Associate Professor, Harvard Business School (rabdelal@hbs.edu). Yoshiko M. Herrera is Associate Professor, Government Department, Harvard University (herrera@fas.harvard.edu). Alastair Iain Johnston is Professor, Government Department, Harvard University (johnston@fas.harvard.edu). Rose McDermott is Associate Professor, Political Science Department, University of California at Santa Barbara (rmcdermott@polsci.ucsb.edu). Research for the paper was made possible by the generous support of the Weatherhead Initiative of the Weatherhead Center for International Affairs at Harvard University. We are grateful to those who commented on earlier versions of this paper: Peter Burke, Lars-Erik Cederman, Jeff Checkel, Michael Dawson, James Fearon, David Frank, Erin Jenne, Michael Jones-Correa, Cynthia Kaplan, Peter Katzenstein, Herb Kelman, Paul Kowert, David Laitin, Daniel Posner, Paul Sniderman, Werner Sollors, Jeff Strabone, Philip Stone, Ronald Suny, Charles Tilly, Mary Waters, and three anonymous reviewers. We would also like to thank participants of the 2004 Identity as a Variable conference, including Henry Brady, Kanchan Chandra, Jack Citrin, Neta Crawford, Jennifer Hochschild, Jacques Hymans, Ted Hopf, Cynthia Kaplan, Ulrich Krotz, Taeku Lee, Will Lowe, Jason Lyall, Kimberly Neuendorf, Roger Petersen, Kevin Quinn, David Rousseau, Rogers Smith, Donald Sylvan, Kim Williams, and Michael Young, for comments on this version.
Boundary coiflets for wavelet shrinkage in function estimation
- Part of
- Iain M. Johnstone, Bernard W. Silverman
-
- Journal:
- Journal of Applied Probability / Volume 41 / Issue A / 2004
- Published online by Cambridge University Press:
- 14 July 2016, pp. 81-98
- Print publication:
- 2004
-
- Article
- Export citation
-
There are standard modifications of certain compactly supported wavelets that yield orthonormal bases on a bounded interval. We extend one such construction to those wavelets, such as ‘coiflets', that may have fewer vanishing moments than had to be assumed previously. Our motivation lies in function estimation in statistics. We use these boundary-modified coiflets to show that the discrete wavelet transform of finite data from sampled regression models asymptotically provides a close approximation to the wavelet transform of the continuous Gaussian white noise model. In particular, estimation errors in the discrete setting of computational practice need not be essentially larger than those expected in the continuous setting of statistical theory.