7,684 research outputs found
Finite element analysis of dynamic response of wrinkling membranes
No full textA new iterative scheme for finite element analysis of wrinkling membranes, originally devised for static analysis, is extended for analyzing dynamic response of wrinkling membranes. The scheme is found to be successfully implemented with an explicit total Lagrangian finite element code based upon the central difference method. The finite element implementation of the scheme is straightforward, and only minor modifications are needed for existing membrane finite element codes. In light of application for contact-impact, discussed are a couple of existing contact algorithms which are well suited for treating contact-impact of wrinkling membranes with rigid bodies. The validity of the scheme is demonstrated via a numerical simulation of an inflating automotive airbag, made of orthotropic membranes, under impulse pressure loading. (C) 1999 Elsevier Science B.V. All rights reserved
SLIDING MODE CONTROL OF A ZERO-CURRENT SWITCHING RESONANT CONVERTER
No full textA closed-loop output voltage control method for QSRC using a sliding mode control is presented. Because the closed-loop system can be reduced from 3rd order to 2nd order, the system design becomes very much simplified. It is shown that the dynamic ranges of the output voltage and load resistance are very large, and that the dynamic behaviour of the sliding mode control is not affected by input voltage, showing the robustness of the sliding mode control technique. These features are verified by computer simulations and experiments with good agreement
Niemcza diorites and moznodiorites (Sudetes, SW Poland): a record of changing geotectonic setting at ca. 340 Ma
No full textGranites sensu lato in the Sudetes intruded in several episodes during the Variscan orogeny recording different stages of crust and mantle evolution. Correlating precise ages with geochemistry of the Variscan granites provides information on the evolution of these sources within the Variscan orogen. The Variscan intrusive rocks from the Niemcza Zone (Bohemian Massif, Sudetes, SW Poland) include undeformed dioritic to syenitic rocks and magmatically foliated granodiorites. In this study we analysed low SiO2 (48–53 wt.%) monzodioritic rocks from Przedborowa and Koźmice. The monzodiorites contain late-magmatic zircons with ages of 341.8 ± 1.9 Ma for Przedborowa and 335.6 ± 2.3 Ma for Koźmice, interpreted as emplacement ages of the dioritic magmas. Older Przedborowa rocks are lower in K, Mg, Rb and Ni than the Koźmice rocks and similar compositional trend is also observed in the Central Bohemian Plutonic Complex. The implication is that the mantle underlying the Niemcza Zone became more enriched from ca. 342 to ca. 336 Ma, probably following the collision of the Saxothuringian and Moldanubian/Lugian domains. The magmatism related to the collision occurred ca. 12 Ma later than that in the Central Bohemian Plutonic Complex, but was accompanied by a similar change in magma chemistry from high-K (Przedborowa) to shoshonitic (Koźmice, Kośmin enclaves) and probably to ultrapotassic (Wilków Wielki)
High cycle fatigue life prediction of cold forging tools based on workpiece material property
No full textThe present investigation is focused on high cycle fatigue life prediction based on material property of the workpiece. A new approach based on industrial tool life data was introduced for estimation of fatigue properties of the tool material. The effect of the strength coefficient K and strain hardening exponent n of four different workpiece materials was included in the local stress and strain approach to derive a simple relationship between the high cycle fatigue life and material property of the workpiece. According to this relationship, a reasonably reliable high cycle fatigue tool life can be estimated. (C) 2007 Elsevier B.V. All rights reserved.The authors wish to thank for grants from POSCO and
National Research Laboratory Programs of the KOSEF and for
the technical data from Thaeyang Industry. The fellowship from
the Korea Research Foundation was much appreciated for the
Master work of the first author
G2 & G1 plants species of SW Colorado
No full textPresented at the 16th symposium held on September 27, 2019 in Grand Junction, Colorado.2019 G2 species of SW Colorado -- 2019 G1 species of SW Colorado
Synthesis of low temperature burnable P(MMA-co-BMA) binder and control of carbon residue during baking process of BAM phosphor paste
No full textNeural mechanism for judging the appropriateness of facial affect
No full textQuestions regarding the appropriateness of facial expressions in particular situations arise ubiquitously in everyday social interactions. To determine the appropriateness of facial affect, first of all, we should represent our own or the other's emotional state as induced by the social situation. Then, based on these representations, we should infer the possible affective response of the other person. In this study, we identified the brain mechanism mediating special types of social evaluative judgments of facial affect in which the internal reference is related to theory of mind (ToM) processing. Many previous ToM studies have used non-emotional stimuli, but, because so much valuable social information is conveyed through nonverbal emotional channels, this investigation used emotionally salient visual materials to tap ToM. Fourteen right-handed healthy subjects volunteered for our study. We used functional magnetic resonance imaging to examine brain activation during the judgmental task for the appropriateness of facial affects as opposed to gender matching tasks. We identified activation of a brain network, which includes both medial frontal cortex, left temporal pole, left inferior frontal gyrus, and left thalamus during the judgmental task for appropriateness of facial affect compared to the gender matching task. The results of this study suggest that the brain system involved in ToM plays a key role in judging the appropriateness of facial affect in an emotionally laden situation. In addition, our result supports that common neural substrates are involved in performing diverse kinds of ToM tasks irrespective of perceptual modalities and the emotional salience of test materials. (c) 2005 Elsevier B.V. All rights reserved
Weitere schlechte SW-Handschriftendigitalisate aus München (Cgm)
No full textCgm 29 Cgm 134 Cgm 473 Cgm 484 Cgm 485 Cgm 486 Cgm 4700 Cgm 5198 - Wiltener Meisterliederhandschrift Cgm 9489 Im Fall des Cgm 426 (Konstanzer Weltchronik u.a.) wurde das SW-Digitalisat gegen ein Farbdigitalisat ausgetauscht, die URL im Handschriftencensus funktioniert nicht mehr: http://www.handschriftencensus.de/6132 Ich bezeichnete das SW-Digitalisat 2007 als besonders mies: http://archiv.twoday.net/stories/4122473 Nun: Persistenter Link dieser Seite: http://daten.digitale-sammlungen.de/bsb..
The Farthest Spatial Skyline Queries
No full textPareto-optimal objects are favored as each of such objects has at least one competitive edge against all other objects, or "not dominated". Recently, in the database literature, skyline queries have gained attention as an effective way to identify such pareto-optimal objects. In particular, this paper studies the pareto-optimal objects in perspective of facility or business locations. More specifically, given data points P and query points Q in two-dimensional space, our goal is to retrieve data points that are farther from at least one query point than all the other data points. Such queries are helpful in identifying spatial locations far away from undesirable locations, e.g., unpleasant facilities or business competitors. To solve this problem, we first study a baseline Algorithm TFSS and propose an efficient progressive Algorithm BBFS, which significantly outperforms TFSS by exploiting spatial locality. We also develop an efficient approximation algorithm to trade accuracy for efficiency. We validate our proposed algorithms using extensive evaluations over synthetic and real datasets. (C) 2012 Elsevier Ltd. All rights reserved.X1154sciescopu
Migration von /sw vom AFS ins DCE/DFS
No full text/sw ist eine verteilte Softwarebereitstellung mit dem Ziel, jedem Benutzer Software zentral zur Verfügung zu stellen, ohne daß er sich darum kümmern muß, woher er seine Software bekommt. Für eine Außenstehenden ergibt sich somit das Bild eines großen Softwarepools, aus dem er sich fertig installierte Software für seine Plattform herunterladen kann.
Voraussetzung dafür ist, daß ein Benuzter an seiner Workstation über AFS (Andrew File System), DFS (Distributed File System) oder ftp verfügt. Zur Zeit werden vom /sw für 18 verschiedenen Unix-Plattformen 594 Programme in 1024 verschiedenen Installationen angeboten. Die meisten Architekturen vom /sw liegen im AFS, bis auf die Architekturen DEC ALPHA, IRIX 4.0 und Linux, die im NFS liegen.
In Zukunft wird es für die gesamte /sw Software nur noch eine Quelle geben, das DFS. Mit der Migration von /sw aus dem AFS ins DFS entfällt dann die Trennung von /sw in einen AFS-Teil und einem NFS-Teil und damit auch der AFS/NFS-Translators, der recht unstabil läuft. Die gesamte Software von /sw wurde aus dem AFS bzw. NFS ins DFS migriert, so daß für alle vom /sw unterstützten Architekturen nur noch eine Quelle zur Verfügung steht, die Stuttgarter DCE-Zelle. Jeder AFS-Klient hat über den AFS/DFS-Translator Zugriff auf /sw und für die NFS-Klienten wird das /sw-Fi-lesystem exportiert, so daß jeder NFS-Klient die Möglichkeit hat das DFS-Filesystem /sw zu mounten. Eine Workstation kann sowohl AFS- als auch DCE/DFS-Klient sein
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