IMEKO Event Proceedings Search

   

Page 892 of 939 Results 8911 - 8920 of 9382

Wieslaw Kicinski
PROCESSING OF MEASURING SIGNALS FOR MONITORING OF TRANSIENTS IN UNDERWATER ENVIRONMENT

The problem of processing of the class of measuring signals, so called transient signals, caused by shocks of the oxygen tank of diver has been discussed. The method of transient signals processing based on wavelet transform and multivariate data analysis has been described.

Jacek Golebiowski
MEASUREMENT OF AIR HUMUDITY WITH APPLY MEMBRANE SILICON ULTRASONIC DEVICES

The devices to the measurements of relative air humidity with the membrane silicon ultrasonic sensors were presented. The temperature measurements and the determination so called dew point are especially important in the determination of relative air humidity by dew point technique. The accuracy of the dew point determination appoints the accuracy of the method. The optical and photoelectric devices are used very often to the dew point determination in the different applications of this technique. The possibility of the membrane silicon sensor with ultrasonic plate waves application to the determination of the appearance of condensed water vapour is presented in this paper. The device with the ultrasonic plate waves is shown and described. The advantages of the constructed sensor in the practical determinations of air relative humidity by dew point technique are discussed. The results of experimental date are presented.

Vitaliy B. Mokin, Boris I. Mokin
CONTROL OVER VOLUME AND QUALITY OF SEWAGE WATER IN THE RIVER WATERWAY

The paper considers the task of control over volume and quality of sewage water in the river, based on data of natural measurement with the application of the dynamic two -dimensional spatial model of river processes. The mathematical algorithm, calculation expressions and an example illustrating practical realization of this algorithm had also been suggested. The suggested algorithm of control is not sensitive to accidental errors, arising while measuring.

Aimé Lay-Ekuakille
ATMOSPHERIC REMOTE SENSING: TEMPERATURE DATA ACCURACY EVALUATION OF RASS-WIND PROFILER SYSTEM

The aim of this paper is to show the usefulness of a combined apparatus of RASS (Radio Acoustic Sounding System) and radiometer as an integrated sensor system in Remote Sensing field, especially in recovering atmosphere temperatures. Since these two systems work at different frequencies and conditions, it is interesting to see how they can be integrated according to data calibration instead of processing. A supervising unit that describes signal state in some of its conditions has been implemented, for a particular instant of time measured in clock pulse. It is useful to calibrate Rass- Wind Profiler data with radiometer and radiosonde ones. That is, to icrease the accuracy of recovered temperatures by Rass. Simulations and comparison with actual data have demonstrated that this kind of approach is necessary to fill limitations of one apparatus with respect to another.

Diana Milcic, Osman Muftic, Jasna Jurum Kipke
MEASUREMENT OF HUMAN HEAD AND NECK MOVEMENT

Whiplash injuries which occur mainly in rear end collision are the most frequent injuries reported in traffic accidents. In the available literature there are various approaches to solving and explaining whiplash movement of head and neck. The M.D.Freeman et al. mention a number of more than 10000 works related generally to phenomenon of whiplash movement of head and neck. Regardless of the fact that the mentioned movement has been the subject of numerous studies and discussions, it is still lacking clarity and research. In this work measurements have been carried out with the aim of determining the kinematics magnitudes of movement. Different movements of head and neck have also been defined, which were considered as being useful in determining the data for the interpretation of whiplash movement of head and neck.

Jaromír Volf, Marie Bláhová, Stanislav Holý, Karel Vítek, Ladislav Hrubant, Vladimír Bezouška
SPECIAL MINIATURE TRANSDUCER FOR IN VIVO OF BONE MEASUREMENT

This paper attends to new special transducer for measuring the stress field in the bone. This transducer is designed as hole that into bone is placed. Paper described design of this transducer, its properties, results of measurement in simulation conditions and its calibration.

Pietro G. Morasso, Maura Casadio, Cristina Re, Vittorio Sanguineti
MOTOR CONTROL MECHANISMS IN UNSTABLE TASKS

The motor control mechanisms adopted by humans when carrying out unstable tasks are investigated in relation with 2 specific paradigms: A) Stabilisation of the standing posture; B) Stabilisation of an inverted pendulum, grasped at different heights. It is shown that stiffness control is present but is insufficient and predictive control mechanisms are filling the gap.

Francesco Crenna, Matteo Panero, Giovanni B. Rossi
EVALUATION OF THE SOUND EMITTED BY POST-SORTING MACHINES WITH JURY TEST METHODS

Ergonomics aspects in working environment have grown the awareness of the need of improving sound quality of machinery sound as well as to reduce its sound. Psychoacoustics supplies important tools (with more sophisticated methods employing ear–related metrics) in order to evaluate the sound quality. It is well recognized that jury (or panel) evaluation provides a reasonable guide to value the quality of machinery noise in working environment. The following work belongs to a project dealing with the studies and the applications of psychoacoustic methods in order to evaluate the sound emitted by post–sorting machines. After a measurement campaign, two kinds of jury tests have been performed, one based on pair comparison forced-choice trials, the other on magnitude estimation. The results allowed us to define a robust scale of pleasantness of typical sounds generated in a wide variety of post–sorting machines, in different environments and under different operating conditions.

Takashi Moriyama, Toshihiro Miyagawa, Shunsuke Fujiwara
TRANSIENT RESPONSE OF HUMAN BRAIN

This aim of the study is the improvement of the relationship between the operators and robotics in CIM room, and teahing room and students. It is said that we human beings are controlled by the left brain for the intelligent quality (IQ) and by the right brain for the emotional quality (EQ). The blood pressure and frequency, the face temperature and 1/f music taste and odor, the several music are supplied for alpha1 waves (8-10 Hz for the reluxation) and alpha2 waves (10-13 Hz for the concentration). Changing the tacct time of the testee’s liking suitable music is better for making tha alpha1 waves and the alpha2 waves for the right brain. For example changing Allegro (133 c/min) to Andante (70 c/min) of Mozart’s Piano Concert No.21, K 467 or Mendelssohn’s Concert for violin and orchestra in E minor, Op.64 ior Tchaikovsky’s Concert for violin and orchestra in D major, Op.35 is suitable making alpha1 and alpha2 waves in the right brain.

Ken Ohta, Mikhail Svinin, ZhiWei Luo, Shigeyuki Hosoe
DEALING WITH CONSTRAINTS: OPTIMAL TRAJECTORIES OF THE CONSTRAINED HUMAN ARM MOVEMENTS

Opening a door, turning a steering wheel, rotating a coffee mill are typical examples of human movements that require physical interaction with external environment. In these tasks, the human arm is kinematically constrained by the external environment. Although there are infinite possibilities for human subject to select his/her arm trajectories as well as interacting forces, experimental data of human constrained motion show that there exists some regulation inherent in all the measurement data. It is suggested in this paper that in the constrained movements human optimizes the criterion that minimizes the change of the hand contact forces as well as the muscle forces. This criterion differs from the minimum torque change criterion, predicting unconstrained reaching movements. Our experiments show close matching between the prediction and the subjects' data. Therefore, human may use different optimization strategies when performing constrained movements.

Page 892 of 939 Results 8911 - 8920 of 9382