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101.
ABSTRACTWhen a screw dislocation pierces one or two free surface(s), noticeable elastic relaxation takes place nearby these surfaces. To refine the theoretical interpretation of an electron microscopy image this relaxation should be included in a precise imaging model. In the present work, the relaxation field is evaluated for a periodic set of misfit screw dislocations normal to the free surface of a semi-infinite or plate-like heterogeneous bicrystal. The proposed approach uses an appropriate combination of known biperiodic elastic fields. For a homogeneous medium and when the period increases, the results around a misfit screw dislocation converge to those of Eshelby and Stroh (1951) who considered an isolated translation screw dislocation. 相似文献
102.
The molecular interactions in binary mixtures of anisole with o-chlorophenol and o-cresol have been studied at three different temperatures using dielectric measurements. The static permittivity and the permittivity at optical frequency have also been determined and used to obtain the Kirkwood correlation factors, the Bruggeman parameter, the excess permittivity and the excess free energy for different concentrations of two binary mixtures, namely (1) anisole + o-chlorophenol and (2) anisole + o-cresol. Using the effective Kirkwood correlation factor, parallel and anti-parallel alignments among the dipoles are identified. The corrective Kirkwood correlation factor, the excess permittivity and the Bruggeman parameter are used to explain the interaction between unlike molecules. The temperature dependences of the above parameters are also reported. The investigation shows systematic changes in the dielectric behaviour with variations in concentration and temperature. 相似文献
103.
The present study deals with the straining of ferromagnetic martensite in a magnetizing field. A phenomenological model of the movement of the interface between martensitic variants is developed for calculation of the strength of the magnetic field required for a variant change. The effect of uniaxial stress on interface movement is also examined. The results are applied to the martensite phases of NiMnGa and FePd ferromagnetic shape-memory alloys. 相似文献
104.
Werner Ebeling 《World Futures: Journal of General Evolution》2013,69(1-4):467-481
We investigate first several entropy concepts, from static to dynamic entropy. Dynamic entropy is introduced as a measure of predictability. Then the relation between entropy and information is studied. Following Wiener information is considered as a non‐physical quantity, not matter or energy. Information is understood as a binary relation between a sender and a receiver. We differentiate between bound and free information. Information can be created by selforganization, historically it is connected with the origin of life. The structure and predictability of informational strings is investigated. For example we study symbolic sequences generated by evolution, as e.g. texts. It is shown that several information carriers show criticality connected with the existence of long‐range correlations, long memory in time and historical behaviour (self‐tuned criticality). The higher order Shannon entropies and the conditional entropies (dynamical entropies and there limit) are calculated, characteristic scaling laws are found. 相似文献
105.
Aggregating snippets from the semantic memories of many individuals may not yield a good map of an individual’s semantic memory. The authors analyze the structure of semantic networks that they sampled from individuals through a new snowball sampling paradigm during approximately 6 weeks of 1‐hr daily sessions. The semantic networks of individuals have a small‐world structure with short distances between words and high clustering. The distribution of links follows a power law truncated by an exponential cutoff, meaning that most words are poorly connected and a minority of words has a high, although bounded, number of connections. Existing aggregate networks mirror the individual link distributions, and so they are not scale‐free, as has been previously assumed; still, there are properties of individual structure that the aggregate networks do not reflect. A simulation of the new sampling process suggests that it can uncover the true structure of an individual’s semantic memory. 相似文献
106.
David Mitchell 《British Journal for the History of Philosophy》2013,21(5):946-966
This paper explores Nietzsche's account of the free spirit's genesis, as primarily given in the 1886 prefaces written for the works of his ‘free spirit trilogy’. In particular, it will focus on how what will be argued is the free spirit's distinguishing capacity for radical questioning is created out of the process described there. That is, it will examine how what Nietzsche calls, ‘the experience of sickness’, in enabling the free spirit's liberation, helps forge a mode of philosophical awareness which is not otherwise attainable. However, the second half of this paper goes on to explore how the success of this process is endangered by a certain psychological tendency to which free spirits are susceptible. In other words, the free spirit's chance of enduring those painful depths of sickness necessary for liberation is threatened by the appeal of ‘romantic pessimism’; a perspective which offers consolation by idealizing the sufferer's state. As such, then, in our final section, we will examine Nietzsche's efforts to combat this phenomenon. In particular, we will look at his advocacy of a specific kind of asceticism for this purpose, and with it his attempt to show how a true liberation of the spirit can be achieved. 相似文献
107.
Ted A. Warfield 《Philosophical explorations》2013,16(2):185-194
In this paper we raise three questions of clarification about Alfred Mele's fine recent book, Free Will and Luck. Our questions concern the following topics: (i) Mele's combination of ‘luck’ and ‘Frankfurt-style’ objections to libertarianism, (ii) Mele's stipulations about ‘compatibilism’ and the relation between questions about free action and questions about moral responsibility, and (iii) Mele's treatment of the Consequence Argument. 相似文献
108.
Alfred Mele 《Philosophical explorations》2013,16(3):297-309
This article explores the conceptual connections between free action and action for which the agent is morally responsible. Questions addressed include the following. Can agents who are never morally responsible for anything sometimes act freely? Can agents who never act freely be morally responsible for some of their actions? Various compatibilist and incompatibilist responses to these questions are discussed, as is the control over their behavior that ordinary agents attribute to themselves. 相似文献
109.
Five musicians suffering from focal dystonia participated in a pilot study that examined the feasibility of an experimental protocol designed to assess musicians' motor performance under stress. Electrocardiography, free cortisol levels, and subjective assessments were used to monitor alterations of the hypothalamic-pituitary-adrenal axis. As measures of motor outcome, temporal variability of finger movements and muscular cocontraction of the wrist flexor and extensor were assessed. Findings suggest that the specific experimental design could be successfully applied. Several methodological issues such as carryover effects, the use of free cortisol, the inclusion of a double baseline, and the classification of dystonic patients into stress responders and nonresponders are analyzed and discussed. 相似文献
110.
Leena Klockars 《Scandinavian Psychoanalytic Review》2013,36(2):105-112
Psychoanalysis differs from other theories because of the great significance it attributes to a man's unconscious. Psychoanalysis differs fundamentally from other therapeutic methods in its use of free association and the significance and power it gives to this method when investigating unconscious phenomena. The present article begins with a brief review of the history of free association and its use as a method. After that, I discuss the relationship between free association and memory, neuropsychoanalysis and semiotics. Free association is linked with implicit memory and seen as a way of remembering; unconscious experiences are given a verbal form with the help of free association. The psychoanalytical setting and transference together constitute a psychic space, in which it becomes possible for the patient to get into touch with his or her bodily, psychic and verbal experiences and material simultaneously. The author sees free association specifically as a form of mental processing which is typical to psychoanalysis; it is a core process where the experiences of mind, body and language and their expressions link together. Free association is simultaneously the result of a memory activity and creative activity and, above all, a combination or synthesis of these two processes. 相似文献