1,721,068 research outputs found
Construction of the expression vectors to encode various molecular weight of bioadhesive protein precursor
No full textThe dynamic performance analysis of foil journal bearings considering coulomb friction: Rotating unbalance response
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Multiple script-based task model and decision/interaction model for fetch-and-carry robot
No full textThe characteristics of the behaviors of home-service robots are different from those of other intelligent systems. Based on these characteristics, we developed a task model that can both support meaningful interactions and improve task performance. The task model is able to generate the robot's diverse actions and aid its interaction management. A decision/interaction model was established to decide autonomy of decision problems that are embedded on the task model. When Interactions with humans are required, it also manages timing of the interactions. We demonstrated the applicability of the developed system with a computer simulation. ?2007 IEEE
Design and fabrication of a flexural plate wave accelerometer
No full textWe design and fabricate a novel flexural plate wave (FPW) accelerometer which has wide working range and improved sensitivity. A bridge as well as a rectangular diaphragm with a proof mass has been considered for a wave propagation medium to enhance the performance. The performance improvement is also verified with the bridge structure and the existence of the proof mass in the simulation results
Temperature dependence of the nucleation effect of sorbitol derivatives on polypropylene crystallization
No full textThe temperature dependence of the nucleation effect of three sorbitol derivatives on the crystallization of isotactic polypropylene (iPP) was studied by means of isothermal crystallization kinetic analysis. Isothermal crystallization thermograms obtained by differential scanning calorimetry (DSC) were analyzed based on the Avrami equation. The Avrami analysis for the nucleated iPP was carried out with DSC data collected to 35% relative crystallinity, and the rate constants were corrected assuming the heterogeneous nucleation and three dimensional growth of iPP spherulites. A semi-empirical equation for the radial growth rate of iPP spherulites was given as a function of temperature and was used to determine the number of effective nuclei at different temperatures. The number of effective nuclei in the nucleated samples was estimated to be 3 x 10(2) approximately 10(5) times larger than that in the neat iPP. The logarithmic numbers of the effective nuclei decreased linearly with decreasing degree of supercooling in the range of crystallization temperatures tested. The temperature dependence of the effect of the nucleating agents on iPP crystallization was given quantitatively in terms of the deactivation factor defined as a fraction of the particles that are active at a particular temperature but inert at the temperature one degree higher. The nucleation activity and its temperature dependence are considered to be cooperative effects of many factors, including the dispersion and the physical or chemical nature of the agent as well as the interaction between the agent and the polymer. It is suggested that the temperature dependence of the effect of a nucleating agent should be treated as a characteristic of a given polymer/ nucleating agent mixture
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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