Lebenserinnerungen /

Mode of access: Internet.

Holley's steel reports.

Binder's title.

Der Albanipsalter in Hildesheim und seine beziehung zur symbolischen kirchensculptur des XII. jahrhunderts.

Anhang I. Beschreibung der einzelnen initialen.--Anhang II. Verzeichniss der ganzseitigen bilder der handschrift.--Anhang III. Verzeichniss der monatsbilder und verse im kalender.

Elektrolytische Abscheidung wasserzersetzender Metalle aus ihren Salzlosungen /

Thesis (doctoral)--Georg-Augusts-Universitat zu Gottingen, 1904.

The creators of the age of steel.

Introduction. - Sir Henry Bessemer. - Sir William Siemens. - Sir Joseph Whitworth. - Sir John Brown. - Mr. S.G. Thomas. - Mr. G.J. Snelus.

A proposed scheme for comprehensive characterization of the measured geometric distortion in magnetic resonance imaging using a three-dimensional phantom

Recently, a 3-dimensional phantom that can provide a comprehensive, accurate and complete measurement of the geometric distortion in MRI has been developed. In this paper, a scheme for characterizing the measured geometric distortion using the 3-D phantom is described. In the proposed scheme, a number of quantitative measures are developed and used to characterize the geometric distortion. These measures encompass the overall and spatial aspects of the geometric distortion. Two specific types of volume of interest, rectangular parallelepipeds (including cubes) and spheres are considered in the proposed scheme. As an illustration, characterization of the geometric distortion in a Siemens 1.5T Sonata MRI system using the proposed scheme is presented. As shown, the proposed scheme provides a comprehensive assessment of the geometric distortion. The scheme can be potentially used as a standard procedure for the assessment of geometric distortion in MRI. (C) 2004 American Association of Physicists in Medicine.

Geometric distortion in clinical MRI systems - Part I: evaluation using a 3D phantom

Recently, a 3D phantom that can provide a comprehensive and accurate measurement of the geometric distortion in MRI has been developed. Using this phantom, a full assessment of the geometric distortion in a number of clinical MRI systems (GE and Siemens) has been carried out and detailed results are presented in this paper. As expected, the main source of geometric distortion in modern superconducting MRI systems arises from the gradient field nonlinearity. Significantly large distortions with maximum absolute geometric errors ranged between 10 and 25 mm within a volume of 240 x 240 x 240 mm(3) were observed when imaging with the new generation of gradient systems that employs shorter coils. By comparison, the geometric distortion was much less in the older-generation gradient systems. With the vendor's correction method, the geometric distortion measured was significantly reduced but only within the plane in which these 2D correction methods were applied. Distortion along the axis normal to the plane was, as expected, virtually unchanged. Two-dimensional correction methods are a convenient approach and in principle they are the only methods that can be applied to correct geometric distortion in a single slice or in multiple noncontiguous slices. However, these methods only provide an incomplete solution to the problem and their value can be significantly reduced if the distortion along the normal of the correction plane is not small. (C) 2004 Elsevier Inc. All rights reserved.

ANÁLISE SISTÊMICA DAS RELAÇÕES DE PODER EM GRUPOS DE LIDERANÇA OFICIAL DE IGREJAS DE GOVERNO CONGREGACIONAL: Estudo de Caso em Igrejas Menonitas de Curitiba

A pesquisa a seguir tem o poder como objeto de estudos, especificamente na forma de relações de poder em conselhos diretores (pastoral e administrativo) de igrejas menonitas em Curitiba. A forma presumida de governo dessas igrejas é historicamente congregacional, isto é, as assembléias das respectivas igrejas são supremas e últimas nas deliberações. A metodologia de pesquisa é sociológica, indutiva, funcionalista, com tendências fenomenológicas, tendo como perspectiva principal a teoria sistêmica e seus recursos de pesquisa. A teoria geral dos sistemas orienta os fundamentos da pesquisa, a teoria dos sistemas sociais é o arcabouço da pesquisa. O método de pesquisa é a observação-participante com registros em vídeo e áudio, transcrição, análise e elaboração de conclusões. A técnica de pesquisa citada demonstrou-se eficaz e útil para o levantamento de dados em pesquisas de campo que tratam de grupos e suas funções diferenciadas em agremiações eclesiásticas. Os objetivos buscam identificar a dinâmica sistêmica nas reuniões dos conselhos observados, bem como identificar o processo das relações de poder nos mesmos. As hipóteses lançadas como ponto de partida afirmam que a teoria sistêmica em qualquer perspectiva é observável, bem como os elementos (conselheiros) das relações de poder se demonstram inconscientes de seus atos de poder. As hipóteses principais e secundárias foram confirmadas pela observação-participante, a saber: a pesquisa verifica a hipótese geral de que mesmo igrejas e seus sistemas sociais evidenciam princípios sistêmicos segundo a teoria geral dos sistemas e a teoria dos sistemas sociais de Niklas Luhmann. As hipóteses específicas verificam se os conselheiros dos grupos de liderança evidenciam consciência do poder exercido e do poder implícito em suas funções e papéis; se os grupos formais, eleitos pela assembléia exercem poder de fato ou se existe influência do poder informal; se existe uma correlação, entre o poder formal e as fronteiras rígidas , o poder informal e a fronteira difusa ; se é possível trabalhar preventivamente e interventivamente através do conceito de relações de poder e os princípios sociais sistêmicos. As igrejas menonitas de Curitiba de maneira geral preservam traços de governo congregacional, mas, a transição para estilos de governo pastorcêntricos e autocráticos a partir dos conselhos observados é um fato e parece irreversível. Aparentemente a causalidade desse movimento surge no contexto social metropolitano e suas implicações, mais do que numa mudança estrategicamente planejada pelas lideranças. Portanto, a transição parece ser cultural. Aliás, as transformações sociais das tradições menonitas são diretamente proporcionais à sua inclusão e inculturação no contexto social em que se situam, confirmando assim os princípios sistêmicos da sociedade em geral.(AU)

Autonomic response in depersonalisation disorder

Background Emotional-processing inhibition has been suggested as a mechanism underlying some of the clinical features of depersonalization and/or derealization. In this study, we tested the prediction that autonomic response to emotional stimuli would be reduced in patients with depersonalization disorder. Methods The skin conductance responses of 15 patients with chronic depersonalization disorder according to DSM-IV, 15 controls, and 11 individuals with anxiety disorders according to DSM-IV, were recorded in response to nonspecific elicitors (an unexpected clap and taking a sigh) and in response to 15 randomized pictures with different emotional valences: 5 unpleasant, 5 pleasant, and 5 neutral. Results The skin conductance response to unpleasant pictures was significantly reduced in patients with depersonalization disorder (magnitude of 0.017 µsiemens in controls and 0.103 µsiemens in patients with anxiety disorders; P = .01). Also, the latency of response to these stimuli was significantly prolonged in the group with depersonalization disorder (3.01 seconds compared with 2.5 and 2.1 seconds in the control and anxiety groups, respectively; P = .02). In contrast, latency to nonspecific stimuli (clap and sigh) was significantly shorter in the depersonalization and anxiety groups (1.6 seconds) than in controls (2.3 seconds) (P = .03). Conclusions In depersonalization disorder, autonomic response to unpleasant stimuli is reduced. The fact that patients with depersonalization disorder respond earlier to a startling noise suggests that they are in a heightened state of alertness and that the reduced response to unpleasant stimuli is caused by a selective inhibitory mechanism on emotional processing.