Full-text resources of PSJD and other databases are now available in the new Library of Science.
Visit https://bibliotekanauki.pl
Preferences help
Polish version English version Language
enabled [disable] Abstract
Number of results

Results found: 10

Number of results on page
first rewind previous Page / 1 next fast forward last

Search results

help Sort By:

help Limit search:
first rewind previous Page / 1 next fast forward last
1
Content available remote

Investigation of the Vibroacoustic Climate Inside the Buses MAN SG242 Used in Public Transport Systems

100%
Damijan Z.
|
|
issue 1
27-30
EN
A driver of a municipal transport bus is more liable to vibration-acoustic stimuli connected with the movement of the vehicle than a passenger. In literature on the subject noise and vibration exposures are categorised into passive (whereby passengers are exposed) and active (driver's or machine operator's exposure). Despite new technological solutions and attempts to improve the working conditions during the operation of vehicles, city bus drivers are still exposed to negative impacts of noise and vibrations, causing stress, increased fatigue and lead to numerous diseases. It is required, therefore, that the working conditions for drivers should be monitored on a regular basis. In order that they work safely, their working conditions should be as comfortable as possible, in terms of physical and psychical conditions and free from any nuisance. Therefore it seems merited to investigate the acoustic climate (i.e. acoustic phenomena caused by the sources of noise of vibrations in the function of time and space) and the working conditions during the operation of MAN SG242 vehicles, widely used in public transport systems. The following conclusions can be formulated (based on the conducted tests): the highest effective weighted values of vibration acceleration a_w, eq (0.823 m/s^{2}) (exceedance of the legitimate value) were noted in the passengers' compartment in the middles of the vehicle, the lowest- in the driver's cabin (0.411 m/s^{2}). In the driver's cabin, the peak noise level L_C peak = 138.7 dB was exceeded; as the 1/3 octave analyses show, in the driver's cabin dominates low-frequency noise with the frequency from 10 to 25 Hz and the acoustic pressure level of about 90 dB (G). The research has been conducted within the framework of the author's research no 10.10.130.140 and the statuary ones no 11.11.130.119.
2
Content available remote

The Influence of the Vibroacoustic Environment Conditions on Functional Stability of Drivers

100%
Damijan Z.
|
|
issue 1
23-26
EN
Despite new technological solutions and attempts to improve the working conditions during the operation of vehicles, city bus drivers are still exposed to negative impacts of noise and vibrations. This research project was undertaken in response to the lack of holistic analyses of the environmental factors that might impact on the city bus drivers at work. No extensive major research was done to investigate the influence of the conditions at work on functional stability of bus drivers and basic physiological parameters of the human body (systolic and diastolic pressure, pulse rate, temperature in the ear channel, loading of postural muscles, blood circulation determined with the use of a thermovision camera, fatty tissue content, body mass and physical condition (squeezing and pressing exercises). the main purpose of this research program was to show the impacts that the conditions at work might have on bus drivers or to demonstrate that these impacts do no exist.
3
Content available remote

Investigation of Physical Climate Inside the Lake Wessel Chamber

64%
Damijan Z., Kasprzak C.
|
|
issue 1
31-34
EN
This study summarizes the research results and environmental measurement data collected in the Lake Wessel Chamber in the salt mine Wieliczka. This chamber is a place where patients who suffer from upper airways diseases are treated during 14-days' therapeutic periods. Therapeutic properties of certain caverns and chambers have been well known since the 1950s while the therapeutic values of underground space, particularly the atmosphere, were discovered in the 1960s and the term "subterranotherapy' was subsequently coined up. The treatment is applied there whereby patients, mostly those suffering from respiratory diseases, are subjected to specific physical, chemical and biological stimuli which are available only underground, those stimuli featuring a complex natural structure and synergic biodynamics. Major features of the underground atmosphere determining its therapeutic properties include the presence of natural aerosols, electroaerosols, temperature, humidity, air circulation, ions, light radiation, electromagnetics, gravitation forces and pH of the atmosphere. This study summarises the radiation measurement data (concentrations of potential energy alpha Cα) and air composition measurements (SO_2, H_2S, CO, CO_2, NO contents). the measurement procedures were in line with the relevant standards and regulations.
4
Content available remote

The Influence of Driver's Working Environment οn Thermical Changes of Their Organism

64%
Damijan Z., Uhryński A.
|
|
issue 1
35-40
EN
The work presents the research on the influence of driver's working environment on thermical changes in their organism. The experiment was conducted between 24 and 31 March 2008 in the tram depot of Public Transport Agency in Tychy. Thermo-visual photos were conducted twice a day - before starting work and after finishing it during six following days. The group consisted of 14 drivers aged 24-49 driving city buses (the make: Solaris Urbino 18). The results were analyzed concerning statistics using Statistica. For the sake of the analysis the significance level was p = 0.05, the non-parametric Wilcoxon test or parametric T-test were used for two groups of dependent variables. The research and analysis show that driver's working environment has valid influence on thermical changes in their organism.
5
Content available remote

The Effect of General Low Frequency Vibration on EnergyBalance of a Human Being

64%
Damijan Z., Uhryński A.
Acta Physica Polonica A
|
2013
|
vol. 123
|
issue 6
970-973
EN
The work presents the research and analysis concerning general low frequency vibration and its effect on energy balance of a human organism (a comparison with a control group). The research was conducted in two phases: a group exposed to vibration and a control group. An exposed group (28 participants) took part in 19 training sessions, each lasting 20 min, of low frequency vibration (around 3.2 Hz in standing position) applied to each participant at fixed time of the day. Before and after the session, the thermographic images were taken and deep temperature was taken too. The control group (33 participants) also took part in 19 everyday 20-min sessions with no vibrations and only measurements conducted. The results were analysed concerning statistics using Statistica. For the sake of the analysis the significance level was p = 0.05, the parametric T - test, and the non-parametric Kołmogorow-Smirnow tests were used for two groups of independent variables. Having conducted the research and analysis, one can state that 20-min exposure to low frequency vibration results in significant positive changes in chosen parameters.
6
Content available remote

Systemic Cryotherapy Influence of Low Temperatures on Selected Physiological Parameters

64%
Damijan Z., Uhryński A.
Acta Physica Polonica A
|
2012
|
vol. 121
|
issue 1A
A-38-A-41
EN
The work presents the research and analysis of the influence of low temperatures on selected physiological parameters of a human being. The research was conducted in the 20th Military Healing and Rehabilitation Hospital SPZOZ in Krynica-Zdrój, Poland. Systematic cryotherapy is a procedure during which the whole body, including the head, is exposed to very low temperature (about - 110°C) in a short time (no more than 3 min). The procedure is of a stressful nature; the exposure of almost naked body to a temperature not met in human natural environment causes a sudden mobilization of all the organism defence forces which is used in treatment, sport training and biological renewal. The reaction to extreme cold takes form of a short contraction which is followed by long-lasting - a few hours - dilatation of skin blood vessels. It is accompanied by analgesic and anti-inflammatory effect, relaxation of bronchi muscles, tendency to decrease oedemas and exudates, increase in immunity and mood, including even the euphoria feeling. The research included 20 people after having signed the agreement and excluding any contraindications. The research was carried on following the criteria of the estimate of research reliability according to Jadad randomisation. Every day, during 14 weekdays, after and before the procedure (3 min stay in a cryochamber, t = - 110°C) the measurement of selected parameters were taken, such as: systolic and diastolic pressure, pulse, temperature in aural canal, body mass, fatty tissue and changes of outer body temperatures (thermo-vision analysis). On the basis of the results and conducted analysis one can state that systemic cryotherapy causes the following changes: statistically significant increase of systolic pressure, diastolic pressure, fatty tissue, significant drop of pulse, deep temperature in aural canal and outer body temperature in analysed thermograms. The results were developed statistically using standard methods in accordance with algorithms of statistical inference. The aim of the work is the research on how a short-term exposure to cold changes the outside temperature of the front of a body, and answer to the question if the limb heat - the left and right side - reacts to heat identically. The work introduces biophysical research of the influence of low temperatures on thermodynamic changes in a human being. The results presented are not often met in specialist literature.
7
Content available remote

The Influence of General Low Frequency Vibration on Posture Stability

64%
Damijan Z., Uhryński A.
Acta Physica Polonica A
|
2012
|
vol. 121
|
issue 1A
A-28-A-31
EN
The work presents the research and analysis concerning general low frequency vibration and its influence on posture stability. The research was conducted in two phases: a group exposed to vibration - August 2006, a control group: November 2006 in Krynica-Zdrój. An exposed group (29 participants/took part in 19 training sessions, each lasting 20 min, of low frequency vibration, standing position) applied to each participant at fixed time of the day. The low frequency vibration amplitude was 4 mm, while the frequency was 3.5 Hz. Before and after the session the posturographic examination of posture stability was conducted. The control group (33 participants) also took part in 19 everyday 20 min sessions with no vibrations and only measurements conducted. The results were analyzed concerning statistics using Statistica. For the sake of the analysis the significance level was p = 0.05, the parametric t-test and the nonparametric Kolmogorov-Smirnov tests were used for two groups of independent variables. Having conducted the research and analysis, one can state that 20 min exposure to low frequency vibration results in significant changes in posture stability and 19 day long vibration training changes significantly the posture stability among the participants. The observed changes were of positive nature. The work introduces research on the possibility of using low-frequency vibration to improve human stability. The results presented concern biophysics in rehabilitation of posture stability and are not often met in specialist literature.
8
Content available remote

Investigation of the Vibroacoustic Climate inside the Buses Solaris Urbino 18 Used in Public Transport Systems - Driver's Cab

51%
Damijan Z., Skrzyniarz S., Kwaśniewski J.
Acta Physica Polonica A
|
2011
|
vol. 119
|
issue 6A
1068-1072
EN
Despite new technological solutions and attempts to improve the working conditions during driving of vehicles, city bus drivers are still exposed to negative impacts of noise and vibrations, causing stress, increased fatigue and leads to numerous diseases. Therefore it seems merited to investigate the acoustic climate and the working conditions during the operation of Solaris Urbino 18 vehicles, widely used in public transport systems. The main purpose of this research program was to show the impacts that the conditions at work might have on bus drivers or to demonstrate that these impacts do not exist. No extensive major research was done to investigate the influence of the conditions at work on functional stability of bus drivers. Investigation of vehicle vibroacoustic climate in working (normal) environment are led rarely. Measurements often are done in idle run or during ride at manoeuvring site only for 2-3 min. In this paper results of acceleration and noise in idle run are presented for 3 min measurement and for 3 h until ride. All measurements are done in working environment on streets of Tychy city with passengers on board. In this paper detailed numerical analysis of vibroacoustic parameters are presented. Physical parameters like noise spectral analysis in 1/3 octave frequency bands and histogram of acoustic pressure level in the driver's cabin are presented in results.
9
Content available remote

Impact of Vibroacoustic Climate on Driver's Postural Stability for Eyes Closed in Driver's Cabin

51%
Damijan Z., Skrzyniarz S., Kwaśniewski J.
Acta Physica Polonica A
|
2011
|
vol. 119
|
issue 6A
1073-1076
EN
Several levels of the nervous system are responsible for stability of the vertical position in humans. Three basic inputs are involved: atrial, visual and proprioceptive as well as mechanoreceptors present in the skin. Signals from these inputs control the body posture and its orientation with respect to internal and external reference systems. External systems are formed based on the gravitation field and visual stimuli. Internal systems are generated in the central nervous system by polymodal representations, also referred to as body schema. Some of environmental factors of driver's work place could disturb postural stability. Almost all vehicles are according with actual norms and directives. We investigate how normal week of work has impact on postural stability in new city buses. We concentrate on postural stability for closed eyes. In this paper results of investigation were presented.
10
Content available remote

Investigation of the Vibroacoustic Climate Inside the Buses Solaris Urbino 12 Used in Public Transport Systems

51%
Damijan Z., Iwański D., Dahlke G.
Acta Physica Polonica A
|
2012
|
vol. 121
|
issue 1A
A-32-A-37
EN
Despite new technological solutions and attempts to improve the working conditions during the operation of vehicles, city bus drivers are still exposed to negative impacts of noise and vibrations, causing stress, increased fatigue and lead to numerous diseases. Therefore it seems merited to investigate the acoustic climate (i.e. acoustic phenomena caused by the sources of noise of vibrations in the function of time and space) and the working conditions during the operation of Solaris Urbino 12 vehicles, widely used in public transport systems. The main aim of the research was to show the influence of the 5 day, 8 h working week on selected psycho-physiological parameters on a driver's organism. It was assumed that the main aggravating factor of the driver's organism are vibroacoustics conditions of a work place. The results of this research will be presented in due course. This work presents the research on vibroacoustic climate in one of many city buses used - Solaris Urbino 12. Investigation of the vibroacoustic climate is the branch of environmental biophysics. The measurements, tests and analysis are genuine because they were carried out under real conditions, with passengers, in the long stretches of time and in the entire route of the vehicle. Presented results are very rarely reported in the literature.
first rewind previous Page / 1 next fast forward last
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.