3,668 research outputs found

    Russia and the World Trade Organization: Will TRIPS Be a Stumbling Block to Accession?

    Get PDF
    Arbetet som presenteras i denna rapport har utförts pÄ R1K, vilket Àr en avdelning pÄ RönnskÀrsverken, som Àr en del av New Bolidens koncern. 2007 byggdes ett nytt gassystem med ett flertal nya komponenter. Till detta gassystem fanns bristande information om hur dessa komponenter fungerar och hÀnger ihop. Detta examensjobb har till syfte att skapa en funktionsbeskrivning i form av en lÀttlÀst operatörsmanual, för nya och erfarna operatörer. Informationen till funktionsbeskrivningen har kompilerats frÄn tillverkarmanualer, konstruktionsritningar, informationspÀrmar, intervjuer samt ABB styrsystem. Bilder har tagits och redigerats, för att ge en illustrativ överblick av fluider och gasers vÀg genom gassystemet och dess kringutrustning. Information och bilder har sedan sammanstÀllts i en funktionsbeskrivning (Se bilaga 1).The study which is presented in this report has been carried out at R1K, which is a section of the RönnskÀr smelter plant. The plant is owned by New Boliden. In the year of 2007 a new gas system containing several new components were built. The operators that were in charge of monitoring the new system were not given sufficient education about the new components and their part in the system as whole. The purpose of this study is to create a function functional description about the system and all its components. The functional description is to be presented in the form of an easy-to-use manual for both experienced and new operators. The manual has been compiled from manufacturer manuals, construction blueprints, scattered operator manuals, knowledge of the ABB operator-system and interviews with various employees. To give the operators and the readers a good visual overview of all the different gas and fluid flows in the system pictures have been taken. All this have been compiled into the operator manual that is the functional description. (See attachment 1)

    Decomposition of the efficiency of the Chinese state-owned commercial banks at the provincial level

    Get PDF
    This study adopts a bank production function approach to the measurement of banking efficiency at the provincial level in the Chinese state-owned commercial banking sector from 1998 to 2003. Applying Data Envelopment Analysis and efficiency decomposition analysis, this paper has revealed a significant level of pure technical input inefficiency and, to a lesser extent, scale inefficiency across the provincial branches of all the banking groups. The study has also uncovered the extent of inefficiency in individual banking inputs and provincial branches. Finally, the provincial-level efficiency is further decomposed into within-banking-group and between-banking-group effects

    Bounding the entanglement of N qubits with only four measurements

    Full text link
    We introduce a new measure for the genuinely N-partite (all-party) entanglement of N-qubit states using the trace distance metric, and find an algebraic formula for the GHZ-diagonal states. We then use this formula to show how the all-party entanglement of experimentally produced GHZ states of an arbitrary number of qubits may be bounded with only four measurements

    Genuinely Multipartite Concurrence of N-qubit X-matrices

    Full text link
    We find an algebraic formula for the N-partite concurrence of N qubits in an X-matrix. X- matricies are density matrices whose only non-zero elements are diagonal or anti-diagonal when written in an orthonormal basis. We use our formula to study the dynamics of the N-partite entanglement of N remote qubits in generalized N-party Greenberger-Horne-Zeilinger (GHZ) states. We study the case when each qubit interacts with a partner harmonic oscillator. It is shown that only one type of GHZ state is prone to entanglement sudden death; for the rest, N-partite entanglement dies out momentarily. Algebraic formulas for the entanglement dynamics are given in both cases

    Flow Ambiguity: A Path Towards Classically Driven Blind Quantum Computation

    Get PDF
    Blind quantum computation protocols allow a user to delegate a computation to a remote quantum computer in such a way that the privacy of their computation is preserved, even from the device implementing the computation. To date, such protocols are only known for settings involving at least two quantum devices: either a user with some quantum capabilities and a remote quantum server or two or more entangled but noncommunicating servers. In this work, we take the first step towards the construction of a blind quantum computing protocol with a completely classical client and single quantum server. Specifically, we show how a classical client can exploit the ambiguity in the flow of information in measurement-based quantum computing to construct a protocol for hiding critical aspects of a computation delegated to a remote quantum computer. This ambiguity arises due to the fact that, for a fixed graph, there exist multiple choices of the input and output vertex sets that result in deterministic measurement patterns consistent with the same fixed total ordering of vertices. This allows a classical user, computing only measurement angles, to drive a measurement-based computation performed on a remote device while hiding critical aspects of the computation.Comment: (v3) 14 pages, 6 figures. expands introduction and definition of flow, corrects typos to increase readability; contains a new figure to illustrate example run of CDBQC protocol; minor changes to match the published version.(v2) 12 pages, 5 figures. Corrects motivation for quantities used in blindness analysi

    Architecture and Systemics - in Praise of Roughness

    Get PDF
    Architecture is a complex idea in its own right. In architectural culture, systemic references are not new. Design theories, in Europe as well as in USA, have often referred to many concepts more or less strictly linked to Systemics and to scientific domains such as Information theories and Cybernetics. Quite often, such references have been a mere metaphorical suggestion or, as in the field of “rational” design and process engineering, they mostly have heavy functional overtones. Such is the idea of “performance”, whose original definition was meant as an industrial design tool pursuing optimization, linking together the users’ needs and the requirements an artifact must possess to satisfy those needs. But, as we know, “bottom up” emergence processes have nothing to do with “top down” design strategies for optimization. Nevertheless, the idea of performance conveys the meaning of a strong influence intercurring between two entities, one of them on the “giving” and the other one on the “taking” sides, both of them interacting through feedback. For this reason, I believe the idea of performance should not be discarded lightheartedly. Rather, a “softer” notion of performance, linked to the realm of social perception and attachment to places, should be brought to thorough definition. It might be useful to find a more productive, non-metaphorical use of systemic references to understand and (then) to design - or to redevelop - human settlements

    The Air-temperature Response to Green/blue-infrastructure Evaluation Tool (TARGET v1.0) : an efficient and user-friendly model of city cooling

    Get PDF
    The adverse impacts of urban heat and global climate change are leading policymakers to consider green and blue infrastructure (GBI) for heat mitigation benefits. Though many models exist to evaluate the cooling impacts of GBI, their complexity and computational demand leaves most of them largely inaccessible to those without specialist expertise and computing facilities. Here a new model called The Air-temperature Response to Green/blue-infrastructure Evaluation Tool (TARGET) is presented. TARGET is designed to be efficient and easy to use, with fewer user-defined parameters and less model input data required than other urban climate models. TARGET can be used to model average street-level air temperature at canyon-to-block scales (e.g. 100 m resolution), meaning it can be used to assess temperature impacts of suburb-to-city-scale GBI proposals. The model aims to balance realistic representation of physical processes and computation efficiency. An evaluation against two different datasets shows that TARGET can reproduce the magnitude and patterns of both air temperature and surface temperature within suburban environments. To demonstrate the utility of the model for planners and policymakers, the results from two precinct-scale heat mitigation scenarios are presented. TARGET is available to the public, and ongoing development, including a graphical user interface, is planned for future work

    Correlated Spectral and Recurrence Variations of Cygnus X-1

    Full text link
    We present results of recurrence analysis of the black hole X-ray binary Cygnus X-1 using combined observations from the Rossi X-ray Timing Explorer All-sky Monitor and the Japanese Monitor of All-sky X-ray Image aboard the ISS. From the time-dependent windowed recurrence plot (RP), we compute ten recurrence quantities that describe the dynamical behavior of the source and compare them to the spectral state at each point in time. We identify epochs of state changes corresponding to transitions into highly deterministic or highly stochastic dynamical regimes and their correlation to specific spectral states. We compare k-Nearest Neighbors and Random Forest models for various sizes of the time-dependent RP. The spectral state in Cygnus X-1 can be predicted with greater than 95 per cent accuracy for both types of models explored across a range of RP sizes based solely on the recurrence properties. The primary features from the RP that distinguish between spectral states are the determinism, Shannon entropy, and average line length, all of which are systematically higher in the hard state compared to the soft state. Our results suggest that the hard and soft states of Cygnus X-1 exhibit distinct dynamical variability and the time domain alone can be used for spectral state classification.Comment: 17 pages, 10 figures, 7 tables; Accepted for publication in Monthly Notices of the Royal Astronomical Societ
    • 

    corecore