A new, wavelet-based, non-intrusive method for speech transmission quality measurements is described in the abstract. It models human perception of quality of transmitted speech signal. The deployed Discrete Wavelet Transform, in comparison with Fourier Transform, enables to reduce the computational power. In comparison with standardized methods (based on ITU-T P.563 algorithms), the described method saves about 90% of operations needed, achieving about 90% of the results of P.563. Thus, it is suitable for operational continuous assessment, or even for applications embedded in the mobile...
XVIII IMEKO World Congress · TC18 · 2006 · Download
Maura Casadio, Alessandro Noriaki Ide, Pietro G. Morasso, Vittorio Sanguineti
The paper proposes an approach for linking the analysis of the neural control of movement and motor learning with robot therapy in neuromotor rehabilitation. A new haptic workstation is described and a pilot study of robot therapy with hemiplegic patients is presented.
XVIII IMEKO World Congress · TC18 · 2006 · Download
Anna Ostaszewska, Sabina śebrowska-Łucyk, Rafał Kłoda
The main purpose of this paper is to present the method of subjective quality evaluation recommended by International Telecommunication Union and the results obtained. Authors propose a bunch of factors describing an individual viewer.
XVIII IMEKO World Congress · TC18 · 2006 · Download
This article reports the results of a multinational research project investigating visual performance in halflight (mesopic) conditions. From the experimental investigations using reaction time, detection threshold and recognition contrast threshold techniques, the results were used to develop a system for practical mesopic photometry, which provides an acceptably good fit to the experimental data and is also suitable for practical implementation by the lighting industry. A major feature of the model is that it can be implemented in terms of photopic and scotopic luminance measurements,...
XVIII IMEKO World Congress · TC18 · 2006 · Download
In daily life, humans must compensate for the resultant forces arising form interaction with the physical environment. Recent studies have shown that humans can acquire a neural representation of the relation between motor command and movement, i.e. learn an internal model of the environment dynamics. The present paper discusses whether humans can identify one side of dynamics from the mixed environment dynamics in the case where humans have experienced either of them.
XVIII IMEKO World Congress · TC18 · 2006 · Download
he paper is focused on the analyze of the accuracy and linearity of the six degrees-of-freedom (DoF) measurement system for the sampling of structural dynamic properties in robotics, engineering constructions and for control operation in space. The subject of this measurement device is the sampling and information processing used in the conversion of the 2-D CCD array images into three axial and three angular displacement values. Every 2- CCD array image consists of one, alternatively four light spot produced by light rays from four laser sources. These light beams form the edges of a...
XVIII IMEKO World Congress · TC17 · 2006 · Download
Using industrial robots to the measurement tasks in the field of multicoordinate metrology is worth the interest. But it demands performing adaptation process, correcting the measuring accuracy if needed and determining the field of measuring tasks. During the adaptation process it is important to perform analysis of the accuracy of built measurement system. In the case of lack of accuracy it is indispensable to correct this values. The use of software methods like ANN (Artifical Neural Networks) seems to be expedient, because it is not the mechanical interference. The point of the described...
XVIII IMEKO World Congress · TC17 · 2006 · Download
Mariolino De Cecco, Luca Baglivo, Enrico Ervas, Enrico Marcuzzi
This paper presents a description of the ‘sensor fusion’ algorithm for our proprietary new navigation system, the LS_NAV, which is based on laser range scanning data inside natural environment. The fusion is exploited between odometric navigation and the LS_NAV. In the proposed algorithm the accuracy of both navigation systems is estimated as a function of the actual manoeuvre being carried out. The method allows compensating the drift of the incremental system estimation, high data rate and noise reduction of the LS_NAV estimates. Experimental verification is carried out using an autonomous...
XVIII IMEKO World Congress · TC17 · 2006 · Download
The original Timber Barking Principle – Using Electrical Current Effects has been tested for an industry timber barking purposes. This untraditional timber barking - no wood loss - method demands the special measuring Stand By Post to be done – for the parameters identification and setting; to be realized the voltage control for the Timber Barking Model with Operational Dimensions. The other control way – acceptable for the logs with the low quality subcortical layers has been tested. The speed control tests of the feeding device has been done – to be improved the robotized system...
XVIII IMEKO World Congress · TC17 · 2006 · Download
The new tactile sensors - based on piezoeffect – have been developed. Piezoceramics PZK 850 is used as the force – electrical signal converter. This sensor is able to measure static force to 50 N without charge amplifier using. Functional principles and sensors properties are described.
XVIII IMEKO World Congress · TC17 · 2006 · Download