56,506 research outputs found

    Evaluation and establishment of new quality specification to immunoglobulin and albumin

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    The limits of quality specification for the parameter alcohol content, using 50 industrial batches of immunoglobulin and albumin, were calculated employing Bowker's method to get the upper specification limits for three different conditions. All the measurements of the alcohol content as impurity were performed by an enzymatic method. In addition, the behaviour of the parameter alcohol content was evaluated after the quality specification limits were estimated. The results of the follow-up phase of the 30 industrial batches were processed statistically giving best performance for the immunoglobulin. Using the control charts as tool, showed that both process were under a state of statistical control, and tend to be a capable process for immunoglobulin when Q = 99 %Colegio de Farmacéuticos de la Provincia de Buenos Aire

    A thread-tag based semantics for sequence diagrams

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    The sequence diagram is one of the most popular behaviour modelling languages which offers an intuitive and visual way of describing expected behaviour of object-oriented software. Much research work has investigated ways of providing a formal semantics for sequence diagrams. However, these proposed semantics may not properly interpret sequence diagrams when lifelines do not correspond to threads of controls. In this paper, we address this problem and propose a thread-tag based sequence diagram as a solution. A formal, partially ordered multiset based semantics for the thread-tag based sequence diagrams is proposed

    Recurrence and lyapunov exponents

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    We prove two inequalities between the Lyapunov exponents of a diffeomorphism and its local recurrence properties. We give examples showing that each of the inequalities is optimal

    Discrete-event simulation of process control in low volume high value industries

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    This paper presents a new method of process control for set-up dominant processes. This new method known as Set-up Process Algorithm (SUPA) was compared with existing industrial practices and statistical techniques in the literature. To test the method’s robustness, a generic discrete-event simulation model was built. This model was used to test four different statistical approaches to process control. It was concluded that SUPA offers a method of process control for set-up dominant processes, which is easier to apply than classically derived SPC approaches, by using simple rules and a traffic light system based on design specification. Simulation analysis shows that SUPA: is more sensitive, at detecting an incapable process as it will monitor more units when a process is less capable; is more sensitive than PRE-Control at detecting mean shifts in a process. SUPA is also a nonparametric methodology and therefore robust against processes with non-Gaussian distributions

    Synthesis of behavioral models from scenarios

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    Perceived Welfare Effects of Current Account Deficit - Evidence from American Economy 1967-2005

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    The paper addresses the question, whether the increasing current account deficit has negative impact on American economy and society. Using data for American economy in years 1967 – 2005, it will be shown that perceived welfare effects, as measured by changes in Consumer Confidence, asymmetrically reflect changes in exports and imports. The provided VAR analysis allowed to filter out potential output and cyclical movements in endogenous factors and to describe the remaining error in terms of external trade volatility. Keeping information on exports and imports as external factors allowed to estimate a structure of the model, where the responsiveness of perceived welfare in respect to simulated changes in current account was studied. The provided analysis shows that opening the economy enhanced observed volatility of the Consumer Confidence, while presence of the current account deficit allowed to obtain superior welfare.Current Account, Trade Liberalization, Welfare

    PERCEIVED WELFARE EFFECTS OF CURRENT ACCOUNT DEFICIT – EVIDENCE FROM AMERICAN ECONOMY 1967 - 2005

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    The paper addresses the question, whether the increasing current account deficit has negative impact on American economy and society. Using data for American economy in years 1967 – 2005, it will be shown that perceived welfare effects, as measured by changes in Consumer Confidence, asymmetrically reflect changes in exports and imports. The provided VAR analysis allowed to filter out potential output and cyclical movements in endogenous factors and to describe the remaining error in terms of external trade volatility. Keeping information on exports and imports as external factors allowed to estimate a structure of the model, where the responsiveness of perceived welfare in respect to simulated changes in current account was studied. The provided analysis shows that opening the economy enhanced observed volatility of the Consumer Confidence, while presence of the current account deficit allowed to obtain superior welfare.Current Account, Trade Liberalization
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