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Dominik Janzing 《Informatik - Forschung und Entwicklung》2006,8(4):83-90
Progress in controlling quantum systems is the major pre-requisite
for the realization of quantum computing, yet the results of quantum computing research can also be useful
in solving quantum control problems that are not related to computational problems. We arguethat quantum
computing provides clear concepts and simple models for discussing quantum theoretical problems. In this
article we describe examples from completely different fields where models of quantum computing and quantum
communication shed light on quantum theory.
First we address quantum limits of classical low power computation and argue that the terms of quantum
information theory allows us to discuss device-independent bounds. We
argue that a classical bit behaves to some extent like a quantum bit in the time period where
it switches its logical value. This implies that a readout during the switching process generates
entropy. A related problem is the distribution of timing information like clock signals in low power
devices. For low signal energy, the situation is close to phase-covariant cloning problems in quantum information
theory. 相似文献
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Mathias Weske Jens Hündling Dominik Kuropka und Hilmar Schuschel 《Informatik - Forschung und Entwicklung》1998,13(4):179-195
Zusammenfassung. Dieser Beitrag enth?lt die wesentlichen konzeptionellen überlegungen zur Entwicklung eines flexiblen Workflow-Management-Systems.
Ausgehend von einer Diskussion m?glicher Modellierungsalternativen wird unter Verwendung objektorientierter Modellierungstechniken
ein Workflow-Meta-Schema entwickelt, das die relevanten Entit?ten klassifiziert und ihre Beziehungen abbildet. Anhand eines
Beispiels werden die getroffenen Entwurfentscheidungen ausführlich begründet. Schlie?lich werden Zust?nde und Zustandsüberg?nge
von Workflow-Instanzen beschrieben, und es wird diskutiert, wie dynamische Ver?nderungen von Workflows zur Laufzeit durchgeführt
werden k?nnen, um laufende Workflows dynamisch an ver?nderte Umweltbedingungen anzupassen.
Eingegangen am 20. Dezember 1997 / Angenommen am 24. Juli 1998 相似文献
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Nina Feddermann-Demont Dominik Straumann Jiří Dvořák 《Journal of sports sciences》2014,32(13):1217-1228
AbstractA concussion is a rare but potentially serious injury of football players. Thus, an immediate and valid diagnosis, estimate of severity and therapeutic management is required. To summarise the published information on management of concussion with respect to a safe return to play (RTP), a literature search was conducted. Current guidelines on concussion in sports and significant studies on concussion in football were analysed. After concussion, management and RTP decision should remain in the area of clinical judgement on an individualised basis according to the current international guidelines. If a concussion is suspected, the player should not be allowed to RTP the same day. The RTP programme should follow a gradual step-wise procedure. A concussed player should not RTP unless he/she is asymptomatic and the neurological and neuropsychological examinations are normal. Untimely RTP bears an increased risk of sustaining another more severe brain injury and repetitive brain injury of long-term sequelae. In football, the management of concussion should primarily follow the recommendations proposed by the Concussion in Sports Group. Information and education of players and their medical and coaching team help to protect the players’ health. Future studies on concussion should include validated and detailed information on RTP protocols. 相似文献
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Wie können Ergebnisse der Kompetenzdiagnostik in Forschungsprojekten sinnvoll zurückgemeldet werden?
Reporting on research results to students, teachers and institutions is a big challenge within competence assessment research: students individually have to be given feedback about how they performed, teachers have to be provided with information about their classes, education authorities are interested in actual research results. For feedback being helpful for students, teachers and institutions, the following questions have to be thought of: (1) Who is the feedback given to? What is the aim of the feedback? (2) Which results shall be reported? (3) How should feedback theoretically look like? And (4) how does feedback depend on the given general framework? The given article discusses these questions and offers a “checklist” to research projects with a focus on competence assessment. 相似文献
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Dominik Finkelde 《Culture, Theory & Critique》2018,59(3):232-261
Fantasies and especially excessive or ‘phantascistic’ fantasies, as they are referred to here, have the power to suppress within political communities, consciously and unconsciously alike, inner antagonisms in times of crisis. More precisely, they help to blur aporias within the ideological structures of a community through the evocation of a sensus communis (Kant) that establishes the community anew, similar to an act of religious conversion. Their impact on the space of reasons is analysed in this article as one that does not take part in the game of giving and asking for reasons, but operates in the background of communal reason via an emotionally and clandestine ‘code’ of what it means to be ‘We?…?– We who we are’. Next to theoretical elaborations of how and why these phantascistic fantasies are produced, the theory will be further explained through a series of exemplifications demonstrating the way that it has played out across a long history of conflict in the Middle East and a shorter history of contemporary politics in the United States. Through all of this, the aim is to illustrate how very concrete excessive fantasies have an impact on a body politic's form of enjoyment. 相似文献
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Although the Internet features excess demand for media, especially movie downloads, the motion picture industry lacks sustainable business models for this market. An enriched form of the theory of planned behavior can identify drivers of consumer intentions to adopt a legal movie download service. Using a large data set, this study estimates structural equation model parameters. The magnitude of specific influences is subject to unobserved heterogeneity, according to a finite mixture approach with partial least squares estimation. Not only attitude, but also social influence, perceived technical feasibility, innovativeness, compatibility, and past behavior drive adoption decisions. 相似文献
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Measuring audiences’ selective exposure to media content in naturalistic settings constitutes a methodological challenge that has only partly been resolved. We present a new methodological approach that is based on the open-source web analytics software Piwik. This method allows for the tracking of selective exposure and facilitates the integration of selective exposure data with online survey data. To ease data handling, we created a plug-in turning Piwik into a scientific research tool. After discussing the theoretical and methodological background of collecting data on user selections, we provide step-by-step instructions on the integration of Piwik with online content, survey software, and the merging of tracking and survey data. Finally, we discuss research applications, advantages, and limitations of the new research tool. 相似文献
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Dominik Hölbling Emanuel Preuschl Michaela Hassmann Arnold Baca 《Journal of sports sciences》2017,35(4):317-324
The double side kick is a frequently used technique in pointfighting on which most offensive kicking techniques are based on. The aim of the study was to identify parameters, e.g., trunk and leg positions, durations and velocities that affect successful technique execution.
44 fighters, male and female, including European and World champions, participated in the research. The participants performed double side kicks to a punching bag with the target at chest level. 10 international experts scored (1–10 points; interrater correlation ICC (3,1): 0.952) videos of the best individual trial for quality of technique execution. Based on the average of the scores participants were categorised into 2 equally sized groups. For kinematic data acquisition, a Vicon 3D-motion capturing system was used. The normalised knee height of the kick leg (KHK), normalised absolute distance to the frontal shoulder (DKS) at the end of both chambering phases, the horizontal velocity during both chambering phases (KEV), the durations of all 6 functional phases and total duration, were analysed.
KHK1, KHK2, DKS1 and DKS2, total duration as well as 4 out of 6 phase durations and KEV1 showed significant differences between groups in two-sided t-test or Mann–Whitney U-test for not normally distributed variables. 相似文献