468 research outputs found
Device modelling of nano-structured solar cells
No full textThis chapter discusses the device modeling of nano- structured solar cells. The aim of device modeling is to develop a link between materials properties and the electrical device characteristics of a nano-structured solar cell. This is in contrast with materials modeling, where materials parameters are studied and theoretically modeled based on physical and chemical phenomena and interactions. An assumption that optical analysis of the cell has resulted in the knowledge of the optical generation of electron-hole pairs and excitons as a function of position and wavelength is made. Thus, the scope of this chapter is electrical device modeling of nano-structured solar cells. The first goal of the device modeling is to simulate the J-V curve of a nano-structured solar cell, both in dark and under illumination. Device modelling has various benefits such as (1) to gain insight in the internal cell processes, which are not available to measurement; (2) to enable interpretation of measurements in terms of the internal cell physics and chemistry; (3) to explain the conversion losses occurring in the cell, and if possible, (4) to provide hints for improvement of the cell efficiency. Moreover, numerical simulation of nano-structured solar cells of various kinds is a discipline in full development. Interesting and useful results are already obtained. However, the status already obtained in simulating bulk crystalline and polycrystalline thin film solar cells still has to be obtained in simulating nano-structured solar cells. © 2006 Elsevier B.V. All rights reserved.status: Publishe
The Femme Fatale and the Exotic Queer within Shinya Tuskamoto\u27s Tetsuo: Gender as Narrative Tool within an Allegory for Post WWII Japan\u27s Industrialized Identity Crisis
No full textWithin Shinya Tsukamoto’s seminal independent horror masterpiece Tetsuo, the viewer’s perceptions of reality and the present are distorted within a temporally disjointed blend of horrific fantasy and banal existence; this instability reflects the vocal and subconscious critiques of historical ontological truths exhibited within the emergent transnational genres of Japanese cyberpunk and American Avant-pop ideologies of the late 1980’s. Author Takayuki Tatsumi uses Shinya Tsukamoto\u27s Tetsuo to illustrate the emergence of the Japanoid, a technologically driven fusion of American and Japanese post-war identity best understood as a manifestation of Donna Haraway\u27s socio-political cyborg. Tatsumi strongly advises avoiding interpretation through a queer lens, proposing that the use of “cyborg” and scrap iron serve as an analogy for the stratification and integration of disenfranchised post WWII Okinawan “scrap apaches.” However, Tetsuo’s prominent homoerotic elements cannot be ignored. Arguably, The film presents as blatantly non-heteronormative; to ignore queerness and instead focus solely on Tatsumi\u27s definition of identity ignores the meaning of masculinity in a patriarchal culture, rendering an incomplete (post)colonial reading. A queer reading clarifies Tsukamoto\u27s take on the contemporary disenfranchisement of the so-called Japanoid identity that Tatsumi embraces. Within Tetsuo, representation of woman as femme fatale and an overt queering of masculinity problematize the traditional heteronormative Japanese identity
Inexpensive Fracture Toughness Testing of Welded Steel
No full textIn a prior project, TNO has presented a low-cost way of finding fracture toughness of base materials for cleavage fracture. That method features a small-scale CTOD specimen, combined with simplified sensors, less fatigue pre-cracking, faster testing, and no need for a temperature chamber. This method has been extended to welds by considering the effect of pop-ins. This paper summarizes the prior method and the justifications for it before extending it to welded structures by introducing adjustments for pop-ins for small-scale specimens.Accepted Author ManuscriptShip Hydromechanics and StructuresBUS/TNO STAF
Design Contours for Complex Marine Systems
No full textThis paper examines the performance of 6 stiffened ship panel designs in different operational profiles. The main question of interest is: which sea states will lead to the worst panel performances in terms of reliability? As stiffened panel collapse is governed by combined lateral and in-plane loading effects (non-linear functions of the wave environment) this is not a simple problem and does not easily fit into the confines of traditional analyses. Interesting sea states for stiffened panel collapse are identified by a low-order design contour method which uses order statistics and extreme value theory. The resulting multimodal design contours pinpoint areas of interest and the panel performances are confirmed using a higher-order reliability analysis: the non-linear Design Loads Generator process. Such results have impact for creating and interpreting environmental and design contours, as well as assumptions about which operational profiles will lead to the worst system responses.Accepted Author ManuscriptShip Hydromechanics and StructuresShip Design, Production and Operation
Toward a Phenomenology of Curriculum: The Work of Max Van Manen and T. Tetsuo Aoki.
No full textIn this study an attempt was made at understanding contemporary thought and application of phenomenological research to the field of curriculum and instruction. More specifically, it sought to identify a place and need for a methodology in curriculum research that exposes and clarifies the dynamics of pedagogy as a result of investigating the existential/ontological nature of pedagogical activity. In accomplishing this, the works of two major North American phenomenological curriculum theorists, T. Tetsuo Aoki and Max van Manen were examined. The work of these two significant contemporary curriculum theorists was used due to the international recognition their seminal phenomenologically oriented research activities in curriculum has received. The work of van Manen and Aoki was not only examined for its theoretical foundations and principal themes, but was also used as the guide to a modest phenomenological investigation by the author into the interpretation given to the phenomenon of experiencing knowledge by thirty-three Developmental Reading students from Louisiana State University. This examination of the study was prefaced by a review of three theoretical emphases from which the research of reading has been approached. This examination of the field of reading included a positing by the author of the necessity and benefits a phenomenological perspective of reading can offer to its curriculum development and instruction. Based on this discussion and the work of van Manen and Aoki, the phenomenological analysis of these students\u27 written responses to the reading of the novel Flowers For Algernon provided the researcher with the basis for several recommendations to curriculum development and instructional approaches in teaching reading to developmental education students. The conclusion of this study found that phenomenology, as part of an eclectic research methodology, can uniquely contribute to curriculum research and allows for the creation of a more lifeworld sensitive pedagogical praxis
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