Quantification of dislocation structures at high resolution by atomic force microscopy of dislocation etch pits

Atomic force microscopy of dislocation etch pit structures is a convenient means of characterising the dislocation structure in etchable materials at high resolution for dislocation spacing extending down to 25 nm . This is demonstrated for single crystals of CaF₂. The local deformation zone generated around nanoindents at ambient temperature and the low-angle boundaries generated in the bulk during uniaxial compression at elevated temperatures are presented as examples.     

Is recognition accuracy really impaired when the target is repeated in the display?

Bjork and Murray (1977) have presented a feature-specific interactive channels model that predicts perceptual interference between letters presented simultaneously in visual displays. Maximum interference is predicted when a target letter is presented with an identical letter. In their experiment, Bjork and Murray found support for their model, but their results could have occurred artifactually from response biases of their subjects. Santee and Egeth (1980) used a different paradigm that eliminated the possibility of this particular response bias and reported that their data supported the feature-specific model. However, the present paper shows that analysis of their data by Santee and Egeth was incomplete and the comparisons inappropriate. In two experiments that used the Santee and Egeth paradigm, we failed to find support for the feature-specific model when more detailed analyses of the data were undertaken. In a third experiment, one that used the Bjork and Murray paradigm, but with control of response bias, no significant or suggestive evidence was found that feature similarity between noise and target letters affected recognition of the latter.     

Action selection by temporally distal goal states

In line with ideomotor theory, numerous response–effect compatibility (REC) studies have revealed evidence that action effects are anticipated prior to action initiation, as indicated by an REC effect: For example, a response is given faster when its effect occurs on the same rather than on the opposite side. So far, REC studies have only investigated immediate effects—that is, effects occurring immediately after the response is given. However, it may be argued that in everyday life many actions cause effects that do not occur immediately. Additionally, because actions can have more than one effect, desired effects occurring in the future may only be arrived at if fundamental effects are achieved first. In the present study, we investigated whether temporally more distal effects are anticipated in order to initiate actions, and how multiple, serially occurring effects are represented. To this end, a spatial REC paradigm was extended in such a way that a first, immediate effect (i.e., immediately following the response; E1) was followed 500 ms later by another visual effect (E2). An REC effect was only observed for the temporally more distal E2, and this result suggests that temporally more distal effects can also be anticipated during action selection.     

The Limits of Toleration in John Locke's Liberal Thought

In the following paper I attempt to show how in Locke's liberalthought the individual is subject to a complex operation involvingliberation and subjugation. In A Letter on Toleration (1685),Locke argues that the individual's inward beliefs should be freed fromthe coercion of Church and State. To ensure liberty of conscience, theindividual's soul should be constituted in practice – notstructured by violence but negotiated by rational persuasion. However,as I suggest, the authority of reason is not established without anelement of violence. In his writings on education, Locke maintains thatthe right to care for one's soul should be enjoyed only after rigorousmoral training. Thus, the individual's conscience is to be freed fromoutward violence of ecclesiastic and civil powers only after first, inyouth, being subject to the moral discipline of esteem, disgrace, andshame, the inward violence of which discloses limits in Locke'sdiscourse on toleration.     

Hegel and Derrida on the problem of reason and repression

In this paper I attempt to question central assumptions of Derrida's strategy of deconstruction by analyzing his critique of Hegel's notion of Aufhebung. Hegel's dialectics claims to sublate conflicting difference between not individuals in reconciled communal relations. Deconstruction exposes, however, how Hegel's dialectics leads not to reconciliation but the violent internment of différance; traces of repression reveal the limits of Hegelian reason. Yet by grasping Hegelian dialectics as a restricting economy involving repression, Derrida has difficulties accounting for the difference Hegel introduces between repressive and productive power. In his early philosophy of ethical life (1801-1803), Hegel differentiates between moral and legal coercion (Zwang) and ethical subjugation (Bezwingen). In Glas, as I seek to show, Derrida reduces the difference between these two economies of power without proper justification. Derrida's deconstructive interpretation of Hegelian dialectics thus takes part in the repressive relève it criticizes by limiting a difference in Hegel's discourse on power. This revised version was published online in August 2006 with corrections to the Cover Date.     

Preface

Studies in East European Thought -     

The Phenomenology of Posttraumatic Distress in Older Adult Holocaust Survivors

This paper focuses on the effects of the Holocaust on its survivors more than 55 years after the end of World War II. The emphasis is on survivors who were either adults during the Holocaust and who are now over the age of 70, or survivors who were children during the Holocaust and whose age is now between 56 and 70. The central question was: What kinds of posttraumatic phenomena are seen in older adult survivors? After an overview of the field, the situation of survivors in Israel is presented in 2 ways. Results of a survey of survivors who were referred to Amcha, the National Israeli Center for Psychosocial Support of Survivors of the Holocaust, is provided to give some insight in a clinical population. In addition, 2 case histories of survivors are presented to give a more in-depth perspective. The gap between the data from the questionnaires and the clinical material has relevance for the way in which we conceptualize the late consequences of massive trauma.