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[en] It was built a versatile photoelectrochemical cell devoted to the comparative study of the photosensitive materials used as photoelectrodes in solar-hydrogen production. The experimental arrangement makes possible a relative evaluation of the electrodes properties by the measurement of the electric parameters, giving directly I = f (U) for the cell electric circuit with and without an external electrical bias. It also gives a direct measurement of the volume of the evolved gases, and an on-line analysis of the gases by the coupled gas chromatograph, or of-line, by a mass spectrometer.
[en] We designed a novel sensor specifically aimed at ex vivo measurements of white thrombus volume growth; a white thrombus is induced within an artificial micro-channel where hemostasis takes place starting from whole blood under flow conditions. The advantage of the proposed methodology is to identify the time evolution of the thrombus volume by means of an original data fusion methodology based on 2D optical and electrical impedance data simultaneously processed. On the contrary, the present state of the art optical imaging methodologies allow the thrombus volume estimation only at the end of the hemostatic process
[en] Described is the proposal of application of the GUM uncertainty type A evaluation to measurements with auto-correlated observations. The first step to it is the identification and cleaning of the raw sample data from the regularly variable components. Then formulas for standard deviation of the sample and of the mean value are expressed with the use correction coefficients or the so-called 'effective number' of observations. These quantities depend on number of observations and on the sample autocorrelation function and allow to calculate the expanded uncertainty due to the GUM recommendations. The method of estimation of autocorrelation function for the sample data is also given. Considerations are illustrated by examples
[en] Sun-as-a-star observations are very important for the study of the conditions within the Sun and in particular for the deep interior where higher degree modes do not penetrate. They are also of significance in this era of dramatic advances in stellar asteroseismology as they are comparable to those measured in other stars by asteroseismic missions such as CoRoT, Kepler, and MOST. More than 17 years of continuous measurements of SoHO and more than 30 years of BiSON observations provide very long data sets of uninterrupted helioseismic observations. In this work, we discuss the present status of all these facilities that continue to provide state-of-the-art measurements and invaluable data to improve our knowledge of the deepest layers of the Sun and its structural changes during the activity cycle.
[en] A total edge irregularity strength of G has been already widely studied in many papers. The total α -labeling is said to be a total edge irregular α -labeling of the graph G if for every two different edges e 1 and e 2, it holds w ( e 1) ≠ w ( e 2), where w ( uv ) = f ( u ) + f ( uv ) + f ( v ), for e = uv . The minimum α for which the graph G has a total edge irregular α -labeling is called the total edge irregularity strength of G , denoted by tes ( G ). A natural extension of this concept is by considering the evaluation of the weight is not only for each edge but we consider the weight on each subgraph H ⊆ G . We extend the notion of the total α -labeling into a total H -irregular α -labeling. The total α -labeling is said to be a total H -irregular α -labeling of the graph G if for H ⊆ G , the total H -weights W ( H ) = ∑ v ∈ V ( H ) f ( v ) + ∑ e ∈ E ( H ) f ( e ) are distinct. The minimum α for which the graph G has a total H -irregular α -labeling is called the total H -irregularity strength of G , denoted by tHs ( G ). In this paper we initiate to study the tHs of shackle and amalgamation of any graphs and their bound. (paper)
[en] The imagined existences of 'quantity' in psychology is a prerequisite for measurement. Any person (researcher or subject) may imagine homogeneous concepts as quantities, for example, (perceived) redness, loudness or heaviness of different kinds of objects or events. Conversely, heterogeneous concepts may be merged to imagined quantities such as intelligence or personality, which both are constructed from agreed upon sets of theoretical concepts. Measurement in physics, psychophysics and psychology will be contemplated, comparatively
[en] This paper describes the structure of a repository initiated by IMEKO TC21 to allow the comparison of different definitions and use of the same term or concept in written standards and guidelines available internationally. The method used is illustrated for a case study: the critical concept of 'trueness' and its definitions.
[en] This work presents a method to calibrate the reference wavefront generated by an IDP. This wavefront is considered for quantitative evaluation of a plano-convex aspheric surface. Preliminary experimental results are presented. (paper)
[en] The minimum between solar cycles 23 and 24 was quite unusual compared with other minima for which detailed data are available and this pointed to the possibility that cycle 24 will be unusual. Cycle 24 is almost at its maximum now and we take this opportunity to compare and contrast the solar rotation rate and zonal flows between the two cycles. We find that the rotation rate during cycle 24 is slightly lower than that during cycle 23. Additionally we find that the poleward branch of the zonal flow that is believed to be the harbinger of the next solar cycle is very week in cycle 24.