931 resultados para Operaatio Iraqi Freedom
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General note: Title and date provided by Bettye Lane.
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General note: Title and date provided by Bettye Lane.
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General note: Title and date provided by Bettye Lane.
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General note: Title and date provided by Bettye Lane.
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General note: Title and date provided by Bettye Lane.
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This paper proposes conceptual designs of multi-degree(s) of freedom (DOF) compliant parallel manipulators (CPMs) including 3-DOF translational CPMs and 6-DOF CPMs using a building block based pseudo-rigid-body-model (PRBM) approach. The proposed multi-DOF CPMs are composed of wire-beam based compliant mechanisms (WBBCMs) as distributed-compliance compliant building blocks (CBBs). Firstly, a comprehensive literature review for the design approaches of compliant mechanisms is conducted, and a building block based PRBM is then presented, which replaces the traditional kinematic sub-chain with an appropriate multi-DOF CBB. In order to obtain the decoupled 3-DOF translational CPMs (XYZ CPMs), two classes of kinematically decoupled 3-PPPR (P: prismatic joint, R: revolute joint) translational parallel mechanisms (TPMs) and 3-PPPRR TPMs are identified based on the type synthesis of rigid-body parallel mechanisms, and WBBCMs as the associated CBBs are further designed. Via replacing the traditional actuated P joint and the traditional passive PPR/PPRR sub-chain in each leg of the 3-DOF TPM with the counterpart CBBs (i.e. WBBCMs), a number of decoupled XYZ CPMs are obtained by appropriate arrangements. In order to obtain the decoupled 6-DOF CPMs, an orthogonally-arranged decoupled 6-PSS (S: spherical joint) parallel mechanism is first identified, and then two example 6-DOF CPMs are proposed by the building block based PRBM method. It is shown that, among these designs, two types of monolithic XYZ CPM designs with extended life have been presented.
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With the introduction of new input devices, such as multi-touch surface displays, the Nintendo WiiMote, the Microsoft Kinect, and the Leap Motion sensor, among others, the field of Human-Computer Interaction (HCI) finds itself at an important crossroads that requires solving new challenges. Given the amount of three-dimensional (3D) data available today, 3D navigation plays an important role in 3D User Interfaces (3DUI). This dissertation deals with multi-touch, 3D navigation, and how users can explore 3D virtual worlds using a multi-touch, non-stereo, desktop display. The contributions of this dissertation include a feature-extraction algorithm for multi-touch displays (FETOUCH), a multi-touch and gyroscope interaction technique (GyroTouch), a theoretical model for multi-touch interaction using high-level Petri Nets (PeNTa), an algorithm to resolve ambiguities in the multi-touch gesture classification process (Yield), a proposed technique for navigational experiments (FaNS), a proposed gesture (Hold-and-Roll), and an experiment prototype for 3D navigation (3DNav). The verification experiment for 3DNav was conducted with 30 human-subjects of both genders. The experiment used the 3DNav prototype to present a pseudo-universe, where each user was required to find five objects using the multi-touch display and five objects using a game controller (GamePad). For the multi-touch display, 3DNav used a commercial library called GestureWorks in conjunction with Yield to resolve the ambiguity posed by the multiplicity of gestures reported by the initial classification. The experiment compared both devices. The task completion time with multi-touch was slightly shorter, but the difference was not statistically significant. The design of experiment also included an equation that determined the level of video game console expertise of the subjects, which was used to break down users into two groups: casual users and experienced users. The study found that experienced gamers performed significantly faster with the GamePad than casual users. When looking at the groups separately, casual gamers performed significantly better using the multi-touch display, compared to the GamePad. Additional results are found in this dissertation.
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In this paper I discuss one of the most significant strategies in Spinoza’s theoretical approach against those that entrave its understanding in a very powerful way. As well as Descartes, Spinoza uses the inmediate or unreflexive experience for developing his conception of free will or the distinction between body and soul, but he does so in order to prove that the experience is useful to demonstrate some purely anti-Cartesian thesis that express the core principles of Spinozism.
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the article explores the putatively non-metaphysical – non-voluntarist, and even non-causal – concept of freedom outlined in Hegel’s work and discusses its influential interpretation by robert Pippin as an ‘essentially practical’ concept. I argue that Hegel’s affirmation of freedom must be distinguished from that of Kant and Fichte, since it does not rely on a prior understanding of self-consciousness as an originally teleological relation and it has not the nature of a claim ‘from a practical point of view’.
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Scholarship generated in the post-civil rights US underpins a growing consensus that any honest confrontation with the American past requires an acknowledgment both of the nation’s foundations in racially-based slave labour and of the critical role that the enslaved played in ending that system. But scholars equally need to examine why the end of slavery did not deliver freedom, but instead – after a short-lived ‘jubilee’ during which freedpeople savoured their ‘brief moment in the sun’ – opened up a period of extreme repression and violence. This article traces the political trajectory of one prominent ex-slave and Republican party organiser, Elias Hill, to assess the constraints in which black grassroots activists operated. Though mainly concerned with the dashed hopes of African Americans, their experience of a steep reversal is in many ways the shared and profoundly significant legacy of ex-slaves across the former plantation societies of the Atlantic world.
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Extended contribution to a roundtable on Mark A. Lause's Free Labor: The Civil War and the Making of an American Working Class, emphasizing the wartime labor movement's great difficulty in responding to rapid industrialization brought on by the war, and to the increasing diversity of the labor force brought about by mass immigration.
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What opportunities and challenges are presented to religious education across the globe by the basic human right of freedom of religion and belief? To what extent does religious education facilitate or inhibit ‘freedom of religion’ in schools? What contribution can religious education make to freedom in the modern world? This volume provides answers to these and related questions by drawing together a selection of the papers delivered at the seventeenth session of the International Seminar on Religious Education and Values held in Ottawa in 2010. These reflections from international scholars, drawing upon historical, theoretical and empirical perspectives, provide insights into the development of religious education in a range of national contexts, from Europe to Canada and South Africa, as well as illuminating possible future directions for the subject.
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Thesis (Ph.D.)--University of Washington, 2016-06