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Relevant bibliographies by topics / Robert N

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Academic literature on the topic 'Robert N'

Author: Grafiati

Published: 4 June 2021

Last updated: 2 March 2023

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Journal articles on the topic "Robert N"

1

Moore, Gordon E. "Robert N. Noyce." Physics Today 44, no. 1 (1991): 82–83. http://dx.doi.org/10.1063/1.2809969.

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Hopkins, John C., and Nanette Moore. "Robert N. Thorn." Physics Today 44, no. 12 (1991): 97–98. http://dx.doi.org/10.1063/1.2810376.

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Linda Wang. "Robert N. Hammer." C&EN Global Enterprise 98, no. 47 (2020): 43. http://dx.doi.org/10.1021/cen-09847-obits3.

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Lichter, Paul R. "Robert N. Shaffer." American Journal of Ophthalmology 146, no. 1 (2008): 143–44. http://dx.doi.org/10.1016/j.ajo.2008.03.023.

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Sweet, W. "Robert N. Metcalfe." IEEE Spectrum 33, no. 6 (1996): 48–49. http://dx.doi.org/10.1109/6.499949.

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McDonald, Ronald H. "Robert N. Kearney." PS: Political Science & Politics 20, no. 04 (1987): 968–69. http://dx.doi.org/10.1017/s1049096500027505.

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Linton, Otha. "Robert N. Cooley." Journal of the American College of Radiology 6, no. 9 (2009): 659–60. http://dx.doi.org/10.1016/j.jacr.2009.05.014.

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McDonald, Ronald H. "Robert N. Kearney." PS 20, no. 4 (1987): 968–69. http://dx.doi.org/10.1017/s0030826900629144.

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Whiteley, J. Stuart. "Dr Robert N. Rapoport." Group Analysis 30, no. 1 (1997): 138–39. http://dx.doi.org/10.1177/0533316497301014.

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Pines, Malcolm. "Dr Robert N. Rapoport." Group Analysis 30, no. 1 (1997): 139. http://dx.doi.org/10.1177/0533316497301015.

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Dissertations / Theses on the topic "Robert N"

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Stäubli, Christine. "Gesellschaft, Menschenbild und Erziehung bei Robert Owen und Leo N. Tolstoj /." Zürich : ADAG Administration und Druck, 1989. http://catalogue.bnf.fr/ark:/12148/cb35497355d.

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Agnew, Robert J. "Assessment of the variablity of indoor viable airborne mold sampling using the Anderson N-6 single stage impactor." Oklahoma City : [s.n.], 2002. http://library.ouhsc.edu/epub/theses/Agnew-Robert-J.pdf.

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Kretschmer, Robert [Verfasser], and Helmut [Akademischer Betreuer] Schwarz. "N-H-Bindungsaktivierung und C–N-Bindungsknüpfung durch Übergangsmetallkomplexe in der Gasphase / Robert Kretschmer. Betreuer: Helmut Schwarz." Berlin : Universitätsbibliothek der Technischen Universität Berlin, 2012. http://d-nb.info/1025538811/34.

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Verhoef, Anné H. "Alfa en Omega : 'n studie in die trinitariese denke van Robert Jenson /." Link to the online version, 2008. http://hdl.handle.net/10019.1/1346.

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Tsouti-Schillinger, Assimina N. "Thematics in the art of Robert Morris." Thesis, University of Sussex, 2011. http://sro.sussex.ac.uk/id/eprint/6941/.

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This dissertation investigates thematic unities within Robert Morris's seemingly disparate body of work. It demonstrates the thematic similarities, structural continuities and formal associations used throughout his art despite the great diversity of the media employed. It departs at times from a strictly chronological approach because its primary purpose is to explore how one work begets another or one style morphs into the next. The research involved extensive archival work studying unpublished correspondence and texts, contracts, drawings and emails, along with traditional sources like books, interviews, lectures and Morris's own published criticism and texts. The author also examined many original artworks or reproductions of unavailable ones. Chapter One discusses the definition and problem of style, establishment of artistic influences, and Morris's reluctance to accept traditional boundaries. Chapter Two addresses the choreography and its task-oriented vocabulary, and Morris's minimalist sculptures, examining his ideas on process and the phenomenology of perception. Chapter Three is devoted to Morris's concept of space and exploration of the horizontal as a spatial vector. It studies his interest in structural continuity throughout his lead, mirror and felt works, and touches on both the physical space of the sculptures, and the virtual space of the mirrors, as well as the fleeting evanescent space of the steam. His elaborations on “how to make a mark” are considered, too, from the Blind Time drawings, riding on horseback and body-part imprints, to language and the natural world. Chapter Four turns to Morris's philosophical investigations, his studies of language and imagery—some apocalyptic—and his increasing concern with destructive contemporary attitudes. Chapter Five takes up the works of the last two decades, his interest in memory and his growing cultural pessimism. Finally, analyzing one of the most recent works, the Conclusion makes clear that through its recurrent timeliness, Morris's art achieves a certain sublimity which aims towards a suspension of time—a timelessness.

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Verhoef, Anne Hendrik. "Alfa en omega : ’n studie in die trinitariese denke van Robert Jenson." Thesis, Stellenbosch : University of Stellenbosch, 2008. http://hdl.handle.net/10019.1/1346.

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Thesis (DTh (Systematic Theology and Ecclesiology))—University of Stellenbosch, 2008.<br>This study offers an overview, interpretation and critical evaluation of the theology of the Lutheran American theologian Robert Jenson. The first aim is to give an outline of his theology in such a way that the importance of the relation between God and time in his thought will become clear in this process. This study will therefore focus on specific themes in his theology and the implications for the current theological debate on time, eternity, history and God. The title was also the title of Jenson’s own early study of the work of Karl Barth, Alpha and Omega. Jenson’s theology is ecumenical by driven from the beginning to the end. He tries to formulate a theology for the one united church of the future. In his theology he thus focuses on early writers, the church fathers and on ecumenical confessions such as Nicea. He wants to get clarity why the church differs on certain points and investigates where it all started. He then brings his theology in connection with current Orthodox theologians, as well as with the Western theologians of different church traditions and tries to build on the common factors between them. His theology has an ecumenical aim, but it is first and foremost a theology written in reaction to postmodernism and especially the nihilism of his Western and primarily North-American cultural context. To find answers to these (ecumenical and nihilistic) questions, Jenson focuses on mainly three themes that will be discussed in this study: (1) the relation between time, eternity and Trinity, (2) the trinitarian identity and character of God, and (3) the importance of the narrative nature of theology. Jenson appropriates much of Karl Barth’s thought on the Trinity and on the Trinity’s relation to time and eternity but he draws much more radical implications and consequences. He therefore differs from Barth on these issues at critical points. Jenson stands in the tradition of eschatological and trinitarian theologians of the previous century and he builds his theology around these foci in order to serve his ecumenical aim. Finally the critical question is also asked whether and to what extent Jenson succeeds in his aim. It looks at the specific contributions Jenson made and which questions still remain unanswered regarding this key question for Christian faith, thought and life.

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Fern��ndez, Huerta Juan Francisco. "Mejora de los procesos en el departamento de Supply Relocation Management, Empresa Robert Bosch." Thesis, Universidad de las Am��ricas Puebla, 2010. http://catarina.udlap.mx/u_dl_a/tales/documentos/lni/fernandez_h_jf/.

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Thivierge, Robert. "Le tambour métallique : paradigme instrumental d'un espace sonore temporaire." Master's thesis, Université Laval, 2005. http://hdl.handle.net/20.500.11794/34280.

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Le présent texte d’accompagnement de l’exposition de maîtrise en arts visuels intitulée « Le tambour métallique : paradigme instrumental d’un espace sonore temporaire » approfondit les différentes étapes qui ont amené le candidat à ce projet de recherche. Du travail d’atelier jusqu’au studio de son, ce texte témoigne de la recherche effectuée pour éclaircir le phénomène de la production sonore à travers l’étude des notions fondamentales d’acoustique. Il poursuit avec le récit de la réalisation d’une sculpture-instrument, origine du paradigme de recherche et rend enfin compte de la méthodologie utilisée afin de construire les séquences sonores du projet. De plus, les concepts sociaux et historiques qui conditionnent la nature des projets du candidat y sont exposés : de la persistance de la sensation d’ennui chez l’être humain, en passant par la volonté affichée des avant-gardes musicales de la première moitié du vingtième siècle, de renouveler la matière sonore de l’art musical, jusqu’à l’éclatement de la notion traditionnelle de la sculpture vers une spécificité multisensorielle.<br>Québec Université Laval, Bibliothèque 2019

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MURATA, Eiji, та 英治村田. "Robert N. Anthonyの財務会計学説の含意". 名古屋大学大学院経済学研究科, 2012. http://hdl.handle.net/2237/16282.

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Gauthier, Louise. "An analysis of Robert Rauschenberg's combine-painting period." Master's thesis, Université Laval, 1990. http://hdl.handle.net/20.500.11794/33505.

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Au cours des années cinquante et au début des années soixante, plusieurs critiques d’art proclamaient que la période des combine-paintings de Robert Rauschenberg était une renaissance du mouvement révolutionnaire dada. En effet, dans plusieurs articles de l’époque, on note une utilisation fréquente du terme "néo-dada" pour faire référence à la production de Rauschenberg. Au milieu des années soixante, cependant, une nouvelle tendance critique émergeait condamnant cette catégorisation. Les tenants de cette nouvelle orientation voyaient Rauschenberg non plus comme un néo-dada mais comme un précurseur du Pop. Tout en reconnaissant la validité de ces deux positions critiques, je tenterai de démontrer, dans les pages qui suivent, que ni l’une ni l’autre expliquent de façon adéquate la période des combine-paintings et le projet artistique qui l’a initiée. Après avoir examiné les points de vue de quelques représentants de ces deux tendances antagonistes, je démontrerai que la valeur essentielle des combine-paintings ne peut être reliée ni au dada ni au Pop. En effet, à la différence du mouvement dada qui rejetait l’institution de l’art et du mouvement Pop qui s’intégrait, d’une façon cynique, à celle-ci, les combine- paintings de Rauschenberg s’inscrivent dans l’institution de l’art de manière à la subvertir et reformule ainsi le projet de l’avant-garde historique qui consistait à combler la brèche entre le statut autonome de l’art et la vie quotidienne. Signatures : Louise Gauthier: Elliott<br>During the late 1950s and early 1960s, many critics believed that Robert Rauschenberg’s combine-painting period was a revival of the revolutionary Dada movement. Indeed, in many articles, critics referred to the combines as "neo-dada". In the mid 1960s, however, a new wave of criticism began to surface which strongly criticized this categorization. Rather than considering Rauschenberg as a neo-dadaist, these critics saw him as a precursor to Pop. The purpose of this paper will be to show that while both critical perspectives contain some elements of truth, neither one adequately explains the combine-paintings and the basic artistic project that motivated them. After examining the points of view defended by some representatives of these opposed perspectives, I shall argue that the essential value of Rauschenberg’s combine-paintings does not lie in their relationship to either Dada or Pop. Unlike Dada’s total rejection of the institution of art in bourgeois society and Pop art’s cynical acceptance of it, Rauschenberg’s combine-paintings work within the institution of art in order to subvert it, thus reformulating the historical avant- garde’s unfinished project of breaking down the distinction between art as an autonomous entity and day-to-day life.<br>Montréal Trigonix inc. 2018

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Books on the topic "Robert N"

1

Phantasmen: Robert N. Bloch zum Sechzigsten. Lindenstruth, 2010.

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Robert Munsch: My favorite writer. Weigl Publishers, 2008.

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Vijay, Govindarajan, ed. Management control systems / Robert N. Anthony, Vijay Govindarajan. McGraw Hill/Irwin, 2001.

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Banks-Stiegman, Liesl. A thinker tool for Pigs by Robert N. Munsch. IRI/Skylight Publishing, 1992.

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Goldenson, Robert M. Sex A to Z: Robert M. Goldenson and Kenneth N. Anderson. World Almanac, 1989.

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Robert, Crawford. Sterts & stobies: Poems in Scots by Robert Crawford & W. N. Herbert. Obog Books, 1985.

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Schwarzkopf, David L. A review of Essentials of accounting, 6th ed. [by] Robert N. Anthony. Addison Wesley, 1997.

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Banks-Stiegman, Liesl. A thinker tool for The paper bag princess by Robert N. Munsch. IRI/Skylight Publishing, 1992.

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Robert, Jewett, and McGinn Sheila E, eds. Celebrating Romans: Template for Pauline theology : essays in honor of Robert Jewett. William B. Eerdmans Pub., 2004.

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Stavins, R. N. Environmental economics and public policy: Selected papers of Robert N. Stavins, 1988-1999. E. Elgar Pub., 2000.

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Book chapters on the topic "Robert N"

1

Birnberg, Jacob G. "Memorial: Robert N. Anthony." In Memorial Articles for 20th Century American Accounting Leaders. Routledge, 2016. http://dx.doi.org/10.4324/9781315642321-1.

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Hammer, Stefanie. "Robert N. Bellah: Civil Religion in America (1967)." In Schlüsselwerke der Religionssoziologie. Springer Fachmedien Wiesbaden, 2019. http://dx.doi.org/10.1007/978-3-658-15250-5_29.

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Zeisler, Anikó. "Robert N. Emde – von den Grundmotiven zur Selbstentwicklung." In Die frühe Entwicklung – Psychodynamische Entwicklungspsychologien von Freud bis heute. Vandenhoeck & Ruprecht, 2017. http://dx.doi.org/10.13109/9783666451386.140.

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Kohl, Werner, and Heinz Mayrhofer. "Florentin, Julius und Ludwig Robert – ihre Spuren in Himberg bei Wien und die Zucker-Fabrik in Seelowitz." In Die österreichische Zuckerindustrie und ihre Geschichte(n) 1750-2013. Böhlau Verlag, 2014. http://dx.doi.org/10.7767/boehlau.9783205792802.144.

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"Robert N. Bellah." In Religion and American Culture. Routledge, 2003. http://dx.doi.org/10.4324/9780203426999-38.

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Nier, Keith A. "Robert N. Clayton." In The Encyclopedia of Mass Spectrometry. Elsevier, 2015. http://dx.doi.org/10.1016/b978-0-08-100379-4.00067-8.

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Dreveton, Benjamin, and Gérald Naro. "XV. Robert N. Anthony." In Les grands auteurs en management public. EMS Editions, 2021. http://dx.doi.org/10.3917/ems.chate.2021.01.0162.

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"Robert Lepage ROBERT LEPAGE I N DISCUSSION." In The Twentieth Century Performance Reader. Routledge, 2013. http://dx.doi.org/10.4324/9780203125236-46.

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"Acknowledgments." In Robert N. Butler, MD. Columbia University Press, 2013. http://dx.doi.org/10.7312/ache16442-001.

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"One. Life Review." In Robert N. Butler, MD. Columbia University Press, 2013. http://dx.doi.org/10.7312/ache16442-002.

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Conference papers on the topic "Robert N"

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Lamouroux, Julien, Robert R. Gamache, Anne L. Laraia, et al. "The Importance of Trajectory Models in Complex Robert-Bonamy Formalism Calculations : Application to the Rotational Band of H[sub 2]O Broadened by N[sub 2], O[sub 2], and Air." In 20TH INTERNATIONAL CONFERENCE ON SPECTRAL LINE SHAPES. AIP, 2010. http://dx.doi.org/10.1063/1.3517547.

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Chen, Shiang-Fong, James H. Oliver, and David Fernandez-Baca. "A Fast Algorithm for Planning Collision-Free Paths With Rotations." In ASME 1997 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/detc97/dac-4002.

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Abstract Motion planning is a major problem in robotics. The objective is to plan a collision-free path for a robot moving through a workspace populated with obstacles. In this paper, we present a fast and practical algorithm for moving a convex polygonal robot among a set of polygonal obstacles with translations and rotations. The running time is O(c((n + k)N + nlogn)), where c is a parameter controlling the precision of the results, n is the total number of obstacle vertices, k is the number of intersections of configuration space obstacles, and N is the number of obstacles, decomposed into convex objects. This work builds upon the slabbing method proposed by Ahrikencheikh et al. (1994), which finds an optimal motion for a point among a set of non-overlapping obstacles. Here, we extend the slabbing method to the motion planning of a convex polygonal robot with translations and rotations, which also allows overlapping configuration space obstacles. This algorithm has been fully implemented and the experimental results show that it is more robust and faster than other approaches.

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Schmid, Philipp, and Etienne Barnard. "Robust, n-best formant tracking." In 4th European Conference on Speech Communication and Technology (Eurospeech 1995). ISCA, 1995. http://dx.doi.org/10.21437/eurospeech.1995-168.

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Ferrari, P., G. Giorgi, C. Narduzzi, S. Rinaldi, and M. Rizzi. "Robust synchronization for IEEE 802.15.4 CSS wireless sensor networks." In 2013 IEEE International Workshop on Measurements & Networking (M&N). IEEE, 2013. http://dx.doi.org/10.1109/iwmn.2013.6663767.

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Ophir, Dan, and Ahiya Davidovitch. "Planning TS Trajectory Using MLAT in $\mathrm{o}(\mathrm{n}\log \mathrm{n})$." In 2019 12th International Workshop on Robot Motion and Control (RoMoCo). IEEE, 2019. http://dx.doi.org/10.1109/romoco.2019.8787357.

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Becker, Bernd, and Hans-Ulrich Simon. "How robust is the n-cube?" In 27th Annual Symposium on Foundations of Computer Science (sfcs 1986). IEEE, 1986. http://dx.doi.org/10.1109/sfcs.1986.24.

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Parodi, Gabriel, Augusto Raska, Martin Izquierdo, and Esteban Volentini. "Robot para resolución de laberintos." In 2014 IEEE Biennial Congress of Argentina (ARGENCON). IEEE, 2014. http://dx.doi.org/10.1109/argencon.2014.6868595.

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Grazioso, Stanislao, Annarita Tedesco, Roberto Sabella, et al. "Using a Soft Growing Robot as a Sensor Delivery System in Remote Environments: A Practical Case Study." In 2022 IEEE International Symposium on Measurements & Networking (M&N). IEEE, 2022. http://dx.doi.org/10.1109/mn55117.2022.9887783.

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Liu, Wen, Dimitris P. Ioannou, Johnatan Kantarovsky, Byoung Min, and Tanya Nigam. "Robust Off-State TDDB Reliability of n-LDMOS." In 2022 IEEE International Reliability Physics Symposium (IRPS). IEEE, 2022. http://dx.doi.org/10.1109/irps48227.2022.9764573.

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Sciarra, Alessandro, and Owe Philipsen. "Roberge-Weiss transition in N$_{f}$=2 QCD with staggered fermions and N$_{\tau}$=6." In 34th annual International Symposium on Lattice Field Theory. Sissa Medialab, 2017. http://dx.doi.org/10.22323/1.256.0055.

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Reports on the topic "Robert N"

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Fischer W. Robust linear coupling correction with N-turn maps. Office of Scientific and Technical Information (OSTI), 2003. http://dx.doi.org/10.2172/1061691.

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Lin, Paul P., Alec J. Jaeger, Tung-Yun Wu, et al. Construction of a Robust Non-Oxidative Glycolysis in Model Organisms for n-Butanol Production. Office of Scientific and Technical Information (OSTI), 2019. http://dx.doi.org/10.2172/1506427.

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Dutra, Lauren M., Matthew C. Farrelly, Brian Bradfield, Jamie Ridenhour, and Jamie Guillory. Modeling the Probability of Fraud in Social Media in a National Cannabis Survey. RTI Press, 2021. http://dx.doi.org/10.3768/rtipress.2021.mr.0046.2109.

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Cannabis legalization has spread rapidly in the United States. Although national surveys provide robust information on the prevalence of cannabis use, cannabis disorders, and related outcomes, information on knowledge, attitudes, and beliefs (KABs) about cannabis is lacking. To inform the relationship between cannabis legalization and cannabis-related KABs, RTI International launched the National Cannabis Climate Survey (NCCS) in 2016. The survey sampled US residents 18 years or older via mail (n = 2,102), mail-to-web (n = 1,046), and two social media data collections (n = 11,957). This report outlines two techniques that we used to problem-solve several challenges with the resulting data: (1) developing a model for detecting fraudulent cases in social media completes after standard fraud detection measures were insufficient and (2) designing a weighting scheme to pool multiple probability and nonprobability samples. We also describe our approach for validating the pooled dataset. The fraud prevention and detection processes, predictive model of fraud, and the methods used to weight the probability and nonprobability samples can be applied to current and future complex data collections and analysis of existing datasets.

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Baszler, Timothy, Igor Savitsky, Christopher Davies, Lauren Staska, and Varda Shkap. Identification of bovine Neospora caninum cytotoxic T-lymphocyte epitopes for development of peptide-based vaccine. United States Department of Agriculture, 2006. http://dx.doi.org/10.32747/2006.7695592.bard.

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The goal of the one-year feasibility study was to identify specific cytotoxic T-lymphocyte (CTL) epitopes to Neosporacaninum in the natural bovine host in order to make progress toward developing an effective peptide-based vaccine against bovine neosporosis. We tested the hypothesis that: N. caninum SRS2 peptides contain immunogenicCTLepitope clusters cross-presented by multiple bovine MHC-I and MHC-IIhaplotypes. The specific objectives were: (1) Map bovine CTLepitopes of N. caninum NcSRS-2 and identify consensus MHC-I and class-II binding motifs; and (2) Determine if subunit immunization with peptides containing N. caninum-specificCTLepitopes cross-reactive to multiple bovine MHChaplotypes induces a CTL response in cattle with disparate MHChaplotypes. Neosporosis is a major cause of infectious abortion and congenital disease in cattle, persisting in cattle herds via vertical transmission.5 N. caninum abortions are reported in Israel; a serological survey of 52 Israeli dairy herds with reported abortions indicated a 31% infection rate in cows and 16% infection rate in aborted fetuses.9,14 Broad economic loss due to bovine neosporosis is estimated at $35,000,000 per year in California, USA, and $100,000,000 (Australian) per year in Australia and New Zealand.13 Per herd losses in a Canadian herd of 50 cattle are estimated more conservatively at $2,305 (Canadian) annually.4 Up to date practical measures to reduce losses from neosporosis in cattle have not been achieved. There is no chemotherapy available and, although progress has been made toward understanding immunity to Neospora infections, no efficacious vaccine is available to limit outbreaks or prevent abortions. Vaccine development to prevent N. caninum abortion and congenital infection remains a high research priority. To this end, our research group has over the past decade: 1) Identified the importance of T-lymphocyte-mediated immunity, particularly IFN-γ responses, as necessary for immune protection to congenital neosporosis in mice,1,2,10,11 and 2) Identified MHC class II restricted CD4+ CTL in Neosporainfected Holstein cattle,16 and 3) Identified NcSRS2 as a highly conserved surface protein associated with immunity to Neospora infections in mice and cattle.7,8,15 In this BARD-funded 12 month feasibility study, we continued our study of Neospora immunity in cattle and successfully completed T-lymphocyte epitope mapping of NcSRS2 surface protein with peptides and bovine immune cells,15 fulfilling objective 1. We also documented the importance of immune responses NcSRS2 by showing that immunization with native NcSRS2 reduces congenital Neospora transmission in mice,7 and that antibodies to NcSRS2 specifically inhibition invasion of placental trophoblasts.8 Most importantly we showed that T-lymphocyte responses similar to parasite infection, namely induction of activated IFN-γ secreting Tlymphocytes, could be induced by subunit immunization with NcSRS2 peptides containing the Neospora-specificCTLepitopes (Baszler et al, In preparation) fulfilling objective 2. Both DNA and peptide-based subunit approaches were tested. Only lipopeptide-based NcSRS2 subunits, modified with N-terminal linked palmitic acid to enhance Toll-like receptors 2 and 1 (TLR2-TLR1), stimulated robust antigen-specific T-lymphocyte proliferation, IFN-γ secretion, and serum antibody production across different MHC-IIhaplotypes. The discovery of MHC-II cross-reactive T-cellinducing parasite peptides capable of inducing a potentially protective immune response following subunit immunization in cattle is of significant practical importance to vaccine development to bovine neosporosis. In addition, our findings are more widely applicable in future investigations of protective T-cell, subunit-based immunity against other infectious diseases in outbred cattle populations.

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Beckett-Brown, C. E., A. M. McDonald, and M. B. McClenaghan. Discovering a porphyry deposit using tourmaline: a case study from Yukon. Natural Resources Canada/CMSS/Information Management, 2023. http://dx.doi.org/10.4095/331349.

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As the exploration for porphyry Cu-Au-Mo deposits has become increasingly challenging, the development of more effective techniques directed at detecting buried deposits has become critical. One methodology is to focus on key minerals, one of which is tourmaline, a robust, ubiquitous mineral in most mineralized porphyry systems. Overall, a combination of physical and chemical characteristics including 1) macro-color, 2) morphology, 3) inclusion populations, and 4) trace-element compositions are useful in discriminating between porphyry- versus non-porphyry-derived (or related) tourmaline in surficial sediments (Beckett-Brown 2022). These features are applied to tourmaline obtained from stream sediment samples (n = 22) from 16 streams derived from the unglaciated terrain proximal to the Casino calc-alkaline porphyry Cu-Au-Mo deposit (Yukon Territory, Canada). The obtained tourmaline occurs as two distinct morphologies: 1) individual blocky to prismatic sub- to euhedral grains (Type 1), 2) aggregates of radiating prismatic to acicular sub- to euhedral grains (Type 2). Type 1 grains display trace-element contents that reflect mixed origins including a mineralized porphyry origin as well metamorphic and pegmatitic (background) environments. Type 2 grains almost exclusively exhibit porphyry-derived trace-element chemistries (i.e., high Sr/Pb ~150 avg. and relatively low Zn/Cu ~2.5 avg. values). In Canadian Creek, that directly drains from the Casino deposit, samples closest to the deposit contain &amp;gt;70% porphyry-derived tourmaline, while other streams in the region from unprospective drainage basins contain no porphyry-derived tourmaline. At the most distal sample site in Canadian Creek, ~20 km downstream from Casino, nearly 30% of the recovered tourmaline in the stream sediments is porphyry-related. This method has potential to be a strong indicator of prospectivity and applicable for exploration for porphyry Cu-Au-Mo systems in both unglaciated and glaciated terrains.

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Ron, Eliora, and Eugene Eugene Nester. Global functional genomics of plant cell transformation by agrobacterium. United States Department of Agriculture, 2009. http://dx.doi.org/10.32747/2009.7695860.bard.

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The aim of this study was to carry out a global functional genomics analysis of plant cell transformation by Agrobacterium in order to define and characterize the physiology of Agrobacterium in the acidic environment of a wounded plant. We planed to study the proteome and transcriptome of Agrobacterium in response to a change in pH, from 7.2 to 5.5 and identify genes and circuits directly involved in this change. Bacteria-plant interactions involve a large number of global regulatory systems, which are essential for protection against new stressful conditions. The interaction of bacteria with their hosts has been previously studied by genetic-physiological methods. We wanted to make use of the new capabilities to study these interactions on a global scale, using transcription analysis (transcriptomics, microarrays) and proteomics (2D gel electrophoresis and mass spectrometry). The results provided extensive data on the functional genomics under conditions that partially mimic plant infection and – in addition - revealed some surprising and significant data. Thus, we identified the genes whose expression is modulated when Agrobacterium is grown under the acidic conditions found in the rhizosphere (pH 5.5), an essential environmental factor in Agrobacterium – plant interactions essential for induction of the virulence program by plant signal molecules. Among the 45 genes whose expression was significantly elevated, of special interest is the two-component chromosomally encoded system, ChvG/I which is involved in regulating acid inducible genes. A second exciting system under acid and ChvG/Icontrol is a secretion system for proteins, T6SS, encoded by 14 genes which appears to be important for Rhizobium leguminosarum nodule formation and nitrogen fixation and for virulence of Agrobacterium. The proteome analysis revealed that gamma aminobutyric acid (GABA), a metabolite secreted by wounded plants, induces the synthesis of an Agrobacterium lactonase which degrades the quorum sensing signal, N-acyl homoserine lactone (AHL), resulting in attenuation of virulence. In addition, through a transcriptomic analysis of Agrobacterium growing at the pH of the rhizosphere (pH=5.5), we demonstrated that salicylic acid (SA) a well-studied plant signal molecule important in plant defense, attenuates Agrobacterium virulence in two distinct ways - by down regulating the synthesis of the virulence (vir) genes required for the processing and transfer of the T-DNA and by inducing the same lactonase, which in turn degrades the AHL. Thus, GABA and SA with different molecular structures, induce the expression of these same genes. The identification of genes whose expression is modulated by conditions that mimic plant infection, as well as the identification of regulatory molecules that help control the early stages of infection, advance our understanding of this complex bacterial-plant interaction and has immediate potential applications to modify it. We expect that the data generated by our research will be used to develop novel strategies for the control of crown gall disease. Moreover, these results will also provide the basis for future biotechnological approaches that will use genetic manipulations to improve bacterial-plant interactions, leading to more efficient DNA transfer to recalcitrant plants and robust symbiosis. These advances will, in turn, contribute to plant protection by introducing genes for resistance against other bacteria, pests and environmental stress.

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