broj: 3-4/1996
pdf (28,4 MB) |
|
||||||||||||||
| IZVORNI ZNANSTVENI ČLANCI | ||
| Matić, S., Oršanić, M., Anić, I. | UDK 630*221.4.001 | |
| Some Features and Problems Concerning Silver Fir (Abies alba Mill.) Selection Forests in Croatia pdf HR EN | 91 | |
| Hrašovec, B., Margaletić, J. | UDK 630*449 : 323.3.001 | |
| Seed Pests and their Impact on Reforestation Efforts in Croatia pdf HR EN | 101 | |
| Španjol, Ž. | UDK 502.7.001 | |
| Environmental Protection in the Republic of Croatia pdf HR EN | 107 | |
| Borzan, Ž., Idžojtić, M., Guttenberger, H. | UDK 630*165.42.001 (Picea omorika Panč.) | |
| Research on the Standardization of Gymnosperm Karyotypes using Picea Omorica as an Example pdf HR EN | 121 | |
| Sever, S. | UDK 630*31+903+681 (497.13).001 | |
| Some Experience in the Attempt to Define Logging Strategies in Croatia, a Country in Transition pdf HR EN | 133 | |
| Horvat, D., Sever, S. | UDK 631*352.5+319.4 : 630*232.326.2+236.9 : 631*072.16.001 | |
| Mulching Flail Mower - one Method for Mechanization of Stand Establishment and Treatment Operations pdf HR EN | 143 | |
| Krpan, A. P. B. | UDK 630*379.001 | |
| Problem of Skidding Timber in Croatian Lowland Forests pdf HR EN | 151 | |
| Horvat, D., Sever, S. | UDK 630*375.M--015.2 (234.5) : 630*377.2.001 | |
| Some Properties of the Skidders Used Mountain Forest Stand Thinning pdf HR EN | 157 | |
| Goglia, V., Horvat, D., Risović, S., Sever, S. | UDK 332.14.839.31+861.0.001 | |
| Past and the Future of the Forest Biomass Utilization in Croatia pdf HR EN | 163 | |
| Kušan, V. | UDK 630*587.001 | |
| The Approach to Remote Sensing and GIS in Croatian Forestry pdf HR EN | 171 | |
| Tomanić, S. | UDK 630*689.001 | |
| Choise of Subject of Research in Forest Operations pdf HR EN | 179 | |
| Goglia, V. | UDK 630*362.7-015.21(083.7)001 | |
| Parameters Influenting the Vibration Level of Portable Chain Saw pdf HR EN | 187 | |
| Summary: It is a well known fact that the vibration level of the motor chain saws is influenced by a large number of parameters. To provide for repeatability and reproducibility of the vibration level measurements, the international standards seek to give a clear definition of the measurement procedure for measuring vibrations on the motor chain saw handles. Only a well- defined measurement procedure enables the ergonomic evaluation of motor chain saws and the choice of the type best meeting the imposed ergonomic criteria. Unfortunately, the measurements of the vibration levels made in various laboratories on the same motor chain saw showed substantially different results. In inevitably leads to the conclusion that the measurement procedure does not control all the significant parameters influencing the vibration level of the motor chain saws. It is therefore necessary to do further research work into the quantification of the factors of influence yet not mentioned by the international standards. Bearing this in mind, a research work on motor chain saw vibration levels was done at the Faculty of Forestry, University of Zagreb, Croatia. The following parameters were studied: -operator, - chain strain, - chain guide length, -fuel level in tank, - ways of gripping the motor chain saw handles. The influences of these parameters were quantified by measurements. The paper presents detailled research data and results, which are very interesting in many respects: some of the obtained results were expected, but some of them came as a suprise. The research results on the whole give us reason to believe that this research work might contributed to the gradual improvement of the procedure for measuring vibrations on the motor chain saw handles and initiate the necessary changes of the relevant international standards. Key words: chain saw; vibration; measuring procedure; international standards | ||
| Goglia, V., Beljo, R. | UDK 630*822.34:621*935+9.02.001 | |
| Lateral Movement of the Band Saw Blade and Machine´s own Resistance Power in Relation to the Strain Force pdf HR EN | 195 | |
| Korpel, Š. | UDK 630*228.81+221.4.001 | |
| Development and Strukture of Beech-Fir Virgin Forests and their Application to the Selection Forest Management pdf HR EN | 203 | |