Contributions of ergonomics and prognoses of its development under conditions of complex rationalization in forestry

apprenticeship apprentissage aprendizaje body condition bruit condiciones ambientales condiciones de trabajo condition de milieu condition de travail dasonomos descanso environmental conditions ergonomics ergonomie foresters forestier forestry operations health protection hearing protection horas laborables labour productivity main d'oeuvre mano de obra manpower mo models noise occupational hazards operaciones forestales operations research optimization methods organisation du travail productividad del trabajo protection contre le bruit repos rest riesgos ocupacionales risque professionnel ruido sensory disorders temps de travail trastornos sensoriales trouble sensoriel vibraciones vibration work organization working conditions working hours