In some languages every statement must contain a specification of the type of evidence on which it is based: for example, whether the speaker saw it, or heard it, or inferred it from indirect evidence, or learnt it from someone else. This grammatical reference to information source is called 'evidentiality', and is one of the least described grammatical categories. Evidentiality systems differ in how complex they are: some distinguish just two terms (eyewitness and noneyewitness, or reported and everything else), while (...) others have six or even more terms. Evidentiality is a category in its own right, and not a subcategory of epistemic or some other modality, nor of tense-aspect. Every language has some way of referring to the source of information, but not every language has grammatical evidentiality. In English expressions such as I guess, they say, I hear that, the alleged are not obligatory and do not constitute a grammatical system. Similar expressions in other languages may provide historical sources for evidentials. True evidentials, by contrast, form a grammatical system. In the North Arawak language Tariana an expression such as "the dog bit the man" must be augmented by a grammatical suffix indicating whether the event was seen, or heard, or assumed, or reported. This book provides the first exhaustive cross-linguistic typological study of how languages deal with the marking of information source. Examples are drawn from over 500 languages from all over the world, several of them based on the author's original fieldwork. Professor Aikhenvald also considers the role evidentiality plays in human cognition, and the ways in which evidentiality influences human perception of the world.. This is an important book on an intriguing subject. It will interest anthropologists, cognitive psychologists and philosophers, as well as linguists. (shrink)

Après les guerres du siècle dernier qui ont remis en cause l'idée de progrès, devant les formes multiples des guerres actuelles, peut-on encore penser la paix aujourd'hui? A l'encontre des idées conservatrices de la paix où cette dernière, conçue comme ordre et stabilité, a souvent été le corrélat des Etats policiers, la pensée de la paix, telle que l'élabore Levinas, relève d'une critique de l'autoritarisme politique et permet d'élaborer un nouveau concept de liberté affranchi de la tutelle des Etats. La (...) paix n'est pas ici une idée abstraite mais porte le sujet hors de toutes les formes de confort moral ou de conformisme politique. C'est à un Levinas neuf que nous avons ici à faire : tout en dialoguant avec la tradition moderne et contemporaine de la philosophie politique, il nous montre que la paix est une forme d'insubordination qui aspire à "désembourgeoiser la révolution". Une lecture intranquille de Levinas. (shrink)

L'expérience de théorisation d'Edgar Morin a été, pour nous sociologues, bien plus qu'un témoignage exemplaire. Elle a aidé à entamer un parcours épistémologique ; la discipline sociologique peut, en effet, apparaître comme une partition à plusieurs voix au travers d'une discussion non seulement sociologique, mais aussi, anthropologique et philosophique, et ce, en trois temps : la rupture, la construction et la constatation. Ce livre est, ainsi, conçu comme un "aide à penser", d'une part, la genèse de la sociologie, en revisitant (...) les auteurs canoniques (Marx, Durkheim, Weber) et les théories sociologiques contemporaines, et, d'autre part, la complexité des défis culturels, sociaux et politiques, dans nos sociétés. L'expérience d'une pensée aussi rigoureuse que la complexité ne peut se faire par procuration. Il fallait contribuer à l'initiation à la sociologie et beaucoup d'attention pour oser penser par soi-même. L'ouvrage porte sur des problèmes de "théorie", mais tous s'appuient sur des données ethnographiques (enquêtes de terrain). Enfin, l'ouvrage d'Ali Aït Abdelmalek s'inscrit dans son projet de création, à l'Université de Rennes 2, d'un Groupement d'intérêt scientifique "Institut de la complexité : Territoire, Identité, Patrimoine et Politique", en collaboration avec la Fondation Edgar Morin."--Page 4 of cover. (shrink)

Ultrasonic excitation has been widely used in the detection of microcracks on metal surfaces, but there are problems such as poor excitation effect of ultrasonic pulse, long time to reach the best excitation, and difficult to find microcracks. In this paper, an adaptive ultrasonic pulse excitation device and infrared thermal imaging technology have been combined, as well as their control method, to solve the problem. The adaptive ultrasonic pulse excitation device adds intelligent modules to realize automatic adjustment of detection parameters, (...) which can quickly obtain reliable excitation; the multidegree-of-freedom base realizes the three-dimensional direction change of the ultrasonic gun to adapt to different excitation occasions. When the appropriate ultrasonic excitation makes microcracks in the resonance state, the microcracks can be frictionated, which produce heat rise with the temperature. Then, the microcrack defect can be detected by the infrared thermal instrument through the different surface temperatures with imaging recognition method. Our detection experiments of the titanium alloy plates and the aluminum alloy profiles of marine engineering show that the method can get reliable detection parameters in a short time and measure the crack length effectively. It can be used in many aspects such as crack detection in mechanical structures or complex equipment operating conditions and industrial production processes. (shrink)

It is demonstrated on the basis of the Dirac equation that quarks cannot be confined by a vector gluon potential of the form(r/r 0)a or[ln(r/r 0]a, a>0, if the quark-gluon interaction conserves parity. In order to confine quarks with the parity-conserving interaction, the effective gluon potential must be a pseudovector or a scalar. These are shown in a simple Yang-Mills field with theSU(2) group.

艾丰(1938~),河北玉田人,人民日报编委、经济部主任、高级记者,兼任中国社会科学院研究生院教授,中国人民大学新闻学院教授.

Selections from the sayings of Zhuangzi rendered into cartoon form and translated into English.

We suggest that as people move to construe robots as social agents, interact with them, and treat them as capable of social ties, they might develop (close) relationships with them. We then ask what kind of relationships can people form with bots, what functions can bots fulfill, and what are the societal and moral implications of such relationships.