Results for 'structure'

980 found
Order:
  1. L. popova Paris III.Definitude Et Variation des Structures & Dans les Langues Samoyedes D'actance - 1988 - Contrastes: Revue de l'Association Pour le Developpement des Études Contrastives 16:103.
    No categories
     
    Export citation  
     
    Bookmark  
  2. Some Mechanical Properties of Collagenous Frameworks and Their Functional Significance.Structure of Connective Tissue - 1965 - In Karl W. Linsenmann (ed.), Proceedings. St. Louis, Lutheran Academy for Scholarship.
     
    Export citation  
     
    Bookmark  
  3. Ewald Vervaet.Structures of Personality Along Piagetian Lines - 1994 - Philosophica 54 (2):89-110.
    No categories
     
    Export citation  
     
    Bookmark  
  4. Understanding the object.Property Structure in Terms of Negation: An Introduction to Hegelian Logic & Metaphysics in the Perception Chapter - 2019 - In Robert Brandom (ed.), A Spirit of Trust: A Reading of Hegel’s _phenomenology_. Cambridge, Massachusetts: Harvard University Press.
     
    Export citation  
     
    Bookmark  
  5.  5
    The Phenomenon of Life.Christopher Alexander & Center for Environmental Structure - 2002
    Contemporary architecture is increasingly grounded in science and mathematics. Architectural discourse has shifted radically from the sometimes disorienting Derridean deconstruction, to engaging scientific terms such as fractals, chaos, complexity, nonlinearity, and evolving systems. That's where the architectural action is -- at least for cutting-edge architects and thinkers -- and every practicing architect and student needs to become conversant with these terms and know what they mean. Unfortunately, the vast majority of architecture faculty are unprepared to explain them to students, not (...)
    Direct download  
     
    Export citation  
     
    Bookmark   5 citations  
  6.  5
    Andras Komlosy.Deep Structure Cases Reinterpreted - 1982 - In Ferenc Kiefer (ed.), Hungarian General Linguistics. Benjamins. pp. 351.
    No categories
    Direct download  
     
    Export citation  
     
    Bookmark  
  7.  49
    Exo III digest-partial/\ Exo III digest-complete.Exo I. I. I. Generated Structures - 1996 - Hermes 2 (1):100-102.
    No categories
    Direct download  
     
    Export citation  
     
    Bookmark  
  8.  27
    Residuation, Structural Rules and Context Freeness.Gerhard Jager & Structural Rules Residuation - 2004 - Journal of Logic, Language and Information 13 (1):47-59.
    The article presents proofs of the context freeness of a family of typelogical grammars, namely all grammars that are based on a uni- ormultimodal logic of pure residuation, possibly enriched with thestructural rules of Permutation and Expansion for binary modes.
    No categories
    Direct download  
     
    Export citation  
     
    Bookmark   6 citations  
  9. On this page.A. Structural Model Of Turnout & In Voting - 2011 - Emergence: Complexity and Organization 9 (4).
    No categories
     
    Export citation  
     
    Bookmark  
  10. Displacement.Nicolas Parent & JiróN Mariscal José Antonio de Sucre Questioning Capitalistic Power Structures: A. Way to Reconnect People With - 2022 - In Jennifer Mateer, Simon Springer, Martin Locret-Collet & Maleea Acker (eds.), Energies beyond the state: anarchist political ecology and the liberation of nature. Lanham: Rowman & Littlefield.
     
    Export citation  
     
    Bookmark  
  11. Volume 45, No. 1–August 1998 MC Sánchez/Rational Choice on Non-finite Sets by Means of Expansion-contraction Axioms 1–17 L. Sapir/The Optimality of the Expert and Majority Rules under Exponentially Distributed Competence 19–35. [REVIEW]P. D. Thistle & Economic Performance Social Structure - 1998 - Theory and Decision 45 (2):303-304.
     
    Export citation  
     
    Bookmark  
  12.  3
    Dual structure of mind in 『Guanzi 4』. 이은호 - 2009 - Journal of Eastern Philosophy 58:141-164.
    No categories
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark  
  13. The structure of empirical knowledge.Laurence BonJour - 1985 - Cambridge: Harvard University Press.
    1 Knowledge and Justification This book is an investigation of one central problem which arises in the attempt to give a philosophical account of empirical ...
    Direct download (4 more)  
     
    Export citation  
     
    Bookmark   855 citations  
  14. The structure of behavior.Maurice Merleau-Ponty - 1963 - Boston,: Beacon Press.
    At the time of his death in May 1961, Maurice Merleau-Ponty held the chair of Philosophy at the College de France. Together with Jean-Paul Sartre and Simone de Beauvoir, he was cofounder of the successful and influential review Les Temps Modernes. However, after Merleau-Ponty's two studies of Marxist theory and practice (Humanisme et Terreur and Les Aventures de la Dialectique), he alienated both orthodox Marxists and "mandarins of the left" such as Sartre and de Beauvoir. Perhaps his most lasting contribution (...)
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark   318 citations  
  15. The Problem of Molecular Structure Just Is The Measurement Problem.Alexander Franklin & Vanessa Angela Seifert - forthcoming - The British Journal for the Philosophy of Science.
    Whether or not quantum physics can account for molecular structure is a matter of considerable controversy. Three of the problems raised in this regard are the problems of molecular structure. We argue that these problems are just special cases of the measurement problem of quantum mechanics: insofar as the measurement problem is solved, the problems of molecular structure are resolved as well. In addition, we explore one consequence of our argument: that claims about the reduction or emergence (...)
    Direct download (3 more)  
     
    Export citation  
     
    Bookmark   9 citations  
  16. What is a (social) structural explanation?Sally Haslanger - 2016 - Philosophical Studies 173 (1):113-130.
    A philosophically useful account of social structure must accommodate the fact that social structures play an important role in structural explanation. But what is a structural explanation? How do structural explanations function in the social sciences? This paper offers a way of thinking about structural explanation and sketches an account of social structure that connects social structures with structural explanation.
    Direct download (5 more)  
     
    Export citation  
     
    Bookmark   138 citations  
  17. Structure, Agency and the Internal Conversation.Margaret S. Archer - 2003 - Cambridge University Press.
    The central problem of social theory is 'structure and agency'. How do the objective features of society influence human agents? Determinism is not the answer, nor is conditioning as currently conceptualised. It accentuates the way structure and culture shape the social context in which individuals operate, but it neglects our personal capacity to define what we care about most and to establish a modus vivendi expressive of our concerns. Through inner dialogue, 'the internal conversation', individuals reflect upon their (...)
     
    Export citation  
     
    Bookmark   146 citations  
  18. Structural injustice.Maeve McKeown - 2021 - Philosophy Compass 16 (7):e12757.
    The concept of “structural injustice” has a long intellectual lineage, but Iris Marion Young popularised the term in her late work in the 2000s. Young’s theory tapped into the zeitgeist of the time, providing a credible way of thinking about transnational and domestic injustices, illuminating the importance of political, economic and social structures in generating injustice, theorising the role of individuals in perpetuating structural injustice, and the responsibility of everyone to try to correct it. Young’s theory has inspired secondary and (...)
    No categories
    Direct download (3 more)  
     
    Export citation  
     
    Bookmark   5 citations  
  19. The structure and interpretation of quantum mechanics.R. I. G. Hughes - 1989 - Cambridge: Harvard University Press.
    R.I.G Hughes offers the first detailed and accessible analysis of the Hilbert-space models used in quantum theory and explains why they are so successful.
  20. Structural Injustice and Massively Shared Obligations.Anne Schwenkenbecher - 2021 - Journal of Applied Philosophy 38 (1):1-16.
    It is often argued that our obligations to address structural injustice are collective in character. But what exactly does it mean for ‘ordinary citizens’ to have collective obligations visà- vis large-scale injustice? In this paper, I propose to pay closer attention to the different kinds of collective action needed in addressing some of these structural injustices and the extent to which these are available to large, unorganised groups of people. I argue that large, dispersed and unorganised groups of people are (...)
    Direct download (3 more)  
     
    Export citation  
     
    Bookmark   6 citations  
  21.  67
    “Structural Injustice” as an analytical tool.Kirun Sankaran - 2021 - Philosophy Compass 16 (10):e12780.
    “Structural Injustice” refers to injustices that can't be attributed to particular actions by bad actors. This article surveys Iris Marion Young's influential account of structural injustice; lays out some considerations related to the concept's use as an analytical tool; and critically surveys Young's account of individual responsibility for structural injustice.
    No categories
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark   2 citations  
  22. The structure of epistemic probabilities.Nevin Climenhaga - 2020 - Philosophical Studies 177 (11):3213-3242.
    The epistemic probability of A given B is the degree to which B evidentially supports A, or makes A plausible. This paper is a first step in answering the question of what determines the values of epistemic probabilities. I break this question into two parts: the structural question and the substantive question. Just as an object’s weight is determined by its mass and gravitational acceleration, some probabilities are determined by other, more basic ones. The structural question asks what probabilities are (...)
    Direct download (5 more)  
     
    Export citation  
     
    Bookmark   20 citations  
  23. Structural Rationality and the Property of Coherence.Marc-Kevin Daoust - 2023 - Pacific Philosophical Quarterly 104 (1):170-194.
    What is structural rationality? Specifically, what is the distinctive feature of structural requirements of rationality? Some philosophers have argued, roughly, that the distinctive feature of structural requirements is coherence. But what does coherence mean, exactly? Or, at least, what do structuralists about rationality have in mind when they claim that structural rationality is coherence? This issue matters for making progress in various active debates concerning rationality. In this paper, I analyze three strategies for figuring out what coherence means in the (...)
    Direct download (3 more)  
     
    Export citation  
     
    Bookmark   5 citations  
  24.  8
    The Structure of Scientific Revolutions.Thomas Kuhn - 1962 - In Michael Ruse (ed.), Philosophy After Darwin: Classic and Contemporary Readings. Princeton University Press. pp. 176-177.
  25. The structures of the life-world.Alfred Schutz - 1973 - Evanston [Ill.]: Northwestern University Press. Edited by Thomas Luckmann.
    The Structures of the Life-World is the final focus of twenty-seven years of Alfred Schutz's labor, encompassing the fruits of his work between 1932 and his death in 1959. This book represents Schutz's seminal attempt to achieve a comprehensive grasp of the nature of social reality. Here he integrates his theory of relevance with his analysis of social structures. Thomas Luckmann, a former student of Schutz's, completed the manuscript for publication after Schutz's untimely death.
    No categories
    Direct download  
     
    Export citation  
     
    Bookmark   174 citations  
  26. Structural Powers and the Homeodynamic Unity of Organisms.Christopher J. Austin & Anna Marmodoro - 2017 - In William M. R. Simpson, Robert C. Koons & Nicholas J. Teh (eds.), Neo-Aristotelian Perspectives on Contemporary Science. Routledge. pp. 169-184.
    Although they are continually compositionally reconstituted and reconfigured, organisms nonetheless persist as ontologically unified beings over time – but in virtue of what? A common answer is: in virtue of their continued possession of the capacity for morphological invariance which persists through, and in spite of, their mereological alteration. While we acknowledge that organisms‟ capacity for the “stability of form” – homeostasis - is an important aspect of their diachronic unity, we argue that this capacity is derived from, and grounded (...)
    Direct download  
     
    Export citation  
     
    Bookmark   7 citations  
  27. Structural Realism.James Ladyman - 2014 - In Edward N. Zalta (ed.), The Stanford Encyclopedia of Philosophy. Stanford, CA: The Metaphysics Research Lab.
    Structural realism is considered by many realists and antirealists alike as the most defensible form of scientific realism. There are now many forms of structural realism and an extensive literature about them. There are interesting connections with debates in metaphysics, philosophy of physics and philosophy of mathematics. This entry is intended to be a comprehensive survey of the field.
    Direct download (5 more)  
     
    Export citation  
     
    Bookmark   140 citations  
  28. Beyond Structure: Using the Rational Force Model to Assess Argumentative Writing.Ylva Backman, Alina Reznitskaya, Viktor Gardelli & Ian A. G. Wilkinson - 2023 - Written Communication 40 (2):555–585.
    Current approaches used in educational research and practice to evaluate the quality of written arguments often rely on structural analysis. In such assessments, credit is awarded for the presence of structural elements of an argument, such as claims, evidence, and rebuttals. In this article, we discuss limitations of such approaches, including the absence of criteria for evaluating the quality of the argument elements. We then present an alternative framework, based on the Rational Force Model (RFM), which originated from the work (...)
    Direct download (4 more)  
     
    Export citation  
     
    Bookmark   2 citations  
  29. Structural Irrationality.Thomas Scanlon - 2007 - In Geoffrey Brennan, Robert Goodin, Frank Jackson & Michael Smith (eds.), Common minds: themes from the philosophy of Philip Pettit. Clarendon Press.
     
    Export citation  
     
    Bookmark   102 citations  
  30. Information structure and sentence form: topic, focus, and the mental representations of discourse referents.Knud Lambrecht - 1994 - New York, NY, USA: Cambridge University Press.
    Why do speakers of all languages use different grammatical structures under different communicative circumstances to express the same idea? In this comprehensive study, Professor Lambrecht explores the relationship between the structure of sentences and the linguistic and extra-linguistic contexts in which they are used. His analysis is based on the observation that the structure of a sentence reflects a speaker's assumptions about the hearer's state of knowledge and consciousness at the time of the utterance. This relationship between speaker (...)
    Direct download  
     
    Export citation  
     
    Bookmark   68 citations  
  31. Ontic Structural Realism and Modality.Nora Berenstain & James Ladyman - 2012 - In Elaine Landry & Dean Rickles (eds.), Structural Realism: Structure, Object, and Causality. Springer.
    There is good reason to believe that scientific realism requires a commitment to the objective modal structure of the physical world. Causality, equilibrium, laws of nature, and probability all feature prominently in scientific theory and explanation, and each one is a modal notion. If we are committed to the content of our best scientific theories, we must accept the modal nature of the physical world. But what does the scientific realist’s commitment to physical modality require? We consider whether scientific (...)
    Direct download (6 more)  
     
    Export citation  
     
    Bookmark   35 citations  
  32. Information Structure in Discourse: Towards an Integrated Formal Theory of Pragmatics.Craige Roberts - 1996 - Semantics and Pragmatics 5:1-69.
    A framework for pragmatic analysis is proposed which treats discourse as a game, with context as a scoreboard organized around the questions under discussion by the interlocutors. The framework is intended to be coordinated with a dynamic compositional semantics. Accordingly, the context of utterance is modeled as a tuple of different types of information, and the questions therein — modeled, as is usual in formal semantics, as alternative sets of propositions — constrain the felicitous flow of discourse. A requirement of (...)
     
    Export citation  
     
    Bookmark   277 citations  
  33. Structure and Categoricity: Determinacy of Reference and Truth Value in the Philosophy of Mathematics.Tim Button & Sean Walsh - 2016 - Philosophia Mathematica 24 (3):283-307.
    This article surveys recent literature by Parsons, McGee, Shapiro and others on the significance of categoricity arguments in the philosophy of mathematics. After discussing whether categoricity arguments are sufficient to secure reference to mathematical structures up to isomorphism, we assess what exactly is achieved by recent ‘internal’ renditions of the famous categoricity arguments for arithmetic and set theory.
    Direct download (7 more)  
     
    Export citation  
     
    Bookmark   11 citations  
  34. Structure in mathematics and logic: A categorical perspective.S. Awodey - 1996 - Philosophia Mathematica 4 (3):209-237.
    A precise notion of ‘mathematical structure’ other than that given by model theory may prove fruitful in the philosophy of mathematics. It is shown how the language and methods of category theory provide such a notion, having developed out of a structural approach in modern mathematical practice. As an example, it is then shown how the categorical notion of a topos provides a characterization of ‘logical structure’, and an alternative to the Pregean approach to logic which is continuous (...)
    Direct download (10 more)  
     
    Export citation  
     
    Bookmark   69 citations  
  35.  8
    Structures and Categories for the Representation of Meaning.Timothy C. Potts - 1994 - Cambridge University Press.
    This 1994 book develops a way of representing the meanings of linguistic expressions which is independent of any particular language, allowing the expressions to be manipulated in accordance with rules related to their meanings which could be implemented on a computer. It begins with a survey of the contributions of linguistics, logic and computer science to the problem of representation, linking each with a particular type of formal grammar. A system of graphs is then presented, organized by scope relations in (...)
    Direct download  
     
    Export citation  
     
    Bookmark   3 citations  
  36. Structural realism and the nature of structure.Jonas R. Becker Arenhart & Otávio Bueno - 2015 - European Journal for Philosophy of Science 5 (1):111-139.
    Ontic Structural Realism is a version of realism about science according to which by positing the existence of structures, understood as basic components of reality, one can resolve central difficulties faced by standard versions of scientific realism. Structures are invoked to respond to two important challenges: one posed by the pessimist meta-induction and the other by the underdetermination of metaphysics by physics, which arises in non-relativistic quantum mechanics. We argue that difficulties in the proper understanding of what a structure (...)
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark   18 citations  
  37.  75
    Quantum structures and the nature of reality: the indigo book of 'Einstein meets Magritte'.Diederik Aerts (ed.) - 1999 - Boston: Kluwer Academic.
    Quantum Structures and the Nature of Reality is a collection of papers written for an interdisciplinary audience about the quantum structure research within the International Quantum Structures Association. The advent of quantum mechanics has changed our scientific worldview in a fundamental way. Many popular and semi-popular books have been published about the paradoxical aspects of quantum mechanics. Usually, however, these reflections find their origin in the standard views on quantum mechanics, most of all the wave-particle duality picture. Contrary to (...)
  38. Two Kinds of Structural Injustice: Disentangling Unfreedom and Inequality.Hochan Kim - manuscript
    Structural injustice broadly refers to objectionable outcomes produced by generally accepted social structures for members of particular social groups. But theorists of structural injustice have said relatively little about why certain outcomes are objectionable, and many theorists suggestively connect structural injustice to a worry about oppression without explaining their precise normative concerns. I provide a normative analysis of structural injustice that addresses this gap and clarifies its connection to oppression. On this view, there are two kinds of structural injustice, each (...)
     
    Export citation  
     
    Bookmark  
  39. A Structural Explanation of Injustice in Conversations: It's about Norms.Saray Ayala-López - 2018 - Pacific Philosophical Quarterly 99 (4):726-748.
    In contrast to individualistic explanations of social injustice that appeal to implicit attitudes, structural explanations are unintuitive: they appeal to entities that lack clear ontological status, and the explanatory mechanism is similarly unclear. This makes structural explanations unappealing. The present work proposes a structural explanation of one type of injustice that happens in conversations, discursive injustice. This proposal meets two goals. First, it satisfactorily accounts for the specific features of this particular kind of injustice; and second, it articulates a structural (...)
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark   21 citations  
  40. The Structure of Gunk: Adventures in the Ontology of Space.Jeffrey Sanford Russell - 2008 - In Dean Zimmerman (ed.), Oxford Studies in Metaphysics: Volume 4. Oxford University Press. pp. 248.
    Could space consist entirely of extended regions, without any regions shaped like points, lines, or surfaces? Peter Forrest and Frank Arntzenius have independently raised a paradox of size for space like this, drawing on a construction of Cantor’s. I present a new version of this argument and explore possible lines of response.
    Direct download (3 more)  
     
    Export citation  
     
    Bookmark   21 citations  
  41.  18
    The structure of Hume’s historical thought before the History of England.Pedro Faria - 2024 - Intellectual History Review 34 (2):365-387.
    David Hume’s historical thought was shaped before he even began writing the History of Great Britain in 1752. This article shows how Hume developed his historical thought in an attempt to combine two historical structures: the natural-jurisprudential conjectural history of the Treatise of Human Nature and the early eighteenth-century historical narratives of modern Europe that featured in his Essays. The Treatise’s conjectural history used the developmental categories “rude” and “civilised” to explain the origins of justice, government and the moral sentiment. (...)
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark  
  42. Swap structures semantics for Ivlev-like modal logics.Marcelo E. Coniglio & Ana Claudia Golzio - 2019 - Soft Computing 23 (7):2243-2254.
    In 1988, J. Ivlev proposed some (non-normal) modal systems which are semantically characterized by four-valued non-deterministic matrices in the sense of A. Avron and I. Lev. Swap structures are multialgebras (a.k.a. hyperalgebras) of a special kind, which were introduced in 2016 by W. Carnielli and M. Coniglio in order to give a non-deterministic semantical account for several paraconsistent logics known as logics of formal inconsistency, which are not algebraizable by means of the standard techniques. Each swap structure induces naturally (...)
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark   4 citations  
  43.  6
    Contents Structure of 『Ethics』 and 『Guide of Life』 in Elementary School Textbook, and Asian Ethics. 지준호 - 2010 - THE JOURNAL OF KOREAN PHILOSOPHICAL HISTORY 30:259-282.
    No categories
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark  
  44. Structure not Selection.James A. C. Ladyman - 2021 - In Anjan Chakravartty (ed.), Contemporary Scientific Realism and the Challenge from the History of Science. London, England: Oxford University Press.
    No categories
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark   2 citations  
  45. A Structural Equation Model on Pro-Social Skills and Expectancy-Value of STEM Students.Starr Clyde Sebial & Joy Mirasol - 2023 - European Journal of Educational Research 12 (2):967-976.
    The objective of the study was to develop a structural model that explores the relationship between Mathematics Performance and students’ self-regulated learning skills, grit, and expectancy-value towards science, technology, engineering and mathematics (STEM). The research collected survey data from 664 senior high school students from 17 STEM high schools, and conducted a covariance-based structural equation modeling (SEM) analysis. The results of the SEM analysis indicate that the Re-specified Self-Regulated Learning Skill – Expectancy-Value towards STEM – Grit – Mathematics Performance (Re-specified (...)
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark  
  46. Structural realism: The best of both worlds?John Worrall - 1989 - Dialectica 43 (1-2):99-124.
    The no-miracles argument for realism and the pessimistic meta-induction for anti-realism pull in opposite directions. Structural Realism---the position that the mathematical structure of mature science reflects reality---relieves this tension.
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark   612 citations  
  47. The Structure of Episodic Memory: Ganeri's ‘Mental Time Travel and Attention’.Susanna Siegel & Nicholas Silins - 2017 - Australasian Philosophical Review 1 (4):374-394.
    We offer a framework for assessing what the structure of episodic memory might be, if one accepts the Buddhist denial of persisting selves. This paper is a response to Jonardon Ganeri's paper "Mental time travel and attention", which explores Buddhaghosa's ideas about memory. (It will eventually be published with a reply by Ganeri).
    Direct download (5 more)  
     
    Export citation  
     
    Bookmark  
  48. Structural domination in the labor market.Lillian Cicerchia - 2022 - European Journal of Political Theory 21 (1).
    In recent years, there has been a wide-ranging debate about the neo-republican principle of non-domination. Neo-republicans argue that domination is a capacity for one to intentionally use arbitrary power to interfere in someone’s life. Critics of neo-republicanism argue that this definition of freedom as non-domination precludes a structural analysis of domination, which would explain and critique the ways in which societies produce structural domination unintentionally. The article focuses on capitalism’s labor process and its labor markets. It argues that critics are (...)
    Direct download (3 more)  
     
    Export citation  
     
    Bookmark   12 citations  
  49.  11
    The structure of moral revolutions: studies of changes in the morality of abortion, death, and the bioethics revolution.Robert Baker - 2019 - Cambridge, Massachusetts: The MIT Press.
    On scientific and moral revolutions -- Using the dead for the living: the benthamite moral revolution -- Immoralizing and criminalizing abortion: the doctors revolution -- Irredentism and counter-revolutions in geology and abortion -- The american bioethics revolution -- The structure of moral revolutions.
    Direct download  
     
    Export citation  
     
    Bookmark   12 citations  
  50.  93
    The structure of metaphor: the way the language of metaphor works.Roger M. White - 1996 - Cambridge: Blackwell.
    This volume provides a philosophical introduction to and analysis of the study of metaphor. By proceeding from the concrete analysis of complex metaphors, White is able to identify a range of features which are incompatible with standard accounts of the way words function in metaphor.
    Direct download  
     
    Export citation  
     
    Bookmark   17 citations  
1 — 50 / 980