نتایج جستجو برای: lack of safety during maintenance
تعداد نتایج: 21324009 فیلتر نتایج به سال:
BACKGROUND The occupational health and safety implications associated with compressed and extended work periods have not been fully explored in the mining sector. AIMS To examine the impact on employee health and safety of changes to the roster system in an Australian coal mine. METHODS Absenteeism and incident frequency rate data were collected over a 33 month period that covered three dif...
in the process of milk production, the highest cost relates to animal feed. based on reports provided by the experts, around seventy percent of dairy livestock costs included feed costs. in order to minimize the total price of livestock feed, according to the limits of feed sources in each region or season, and also the transportation and maintenance costs and ultimately milk price reduction, o...
Background: With increasing activities in underground mines and special risks of such mines, establishment of a coordinated and systematic safety system is important. Prediction of occupational accidents to prevent their occurrence is very important. Methods: In this cross-sectional study, the accidents occurred during 2006 to 2010 in one of the mines of central region of Iran were studied, an...
learning-oriented assessment seeks to emphasise that a fundamental purpose of assessment should be to promote learning. it mirrors formative assessment and assessment for learning processes. it can be defined as actions undertaken by teachers and / or students, which provide feedback for the improvement of teaching and learning. it also contrasts with equally important measurement-focused appro...
background: elevator-related accidents are uncommon, but can cause significant injury. however, little data exist on these types of accidents. to compile and analyze accident data involving elevators in an effort to eliminate or at least significantly reduce such accidents. methods: in this retrospective study we investigated 1,819 cases of elevator-related accidents during a four-year period...
plagiarism in esl/efl learning contexts has been established as a dynamic and multi-layered phenomenon and has become a topic engaging many researchers in a heated debate in recent years. comparisons of student-generated texts with their source texts have shown that students rely on source texts in their writings and copying is a major strategy used by both l1 and l2 writers. in our country a...
according to coates’s (2004, as cited in zhang, 2010) definition of "conversational dominance" (p.111), it refers to the phenomenon of a speaker dominating others in interaction. specifically, it means how a speaker makes use of certain strategies to get the floor and maintain the floor. thus, the amount of talk is the main measurement for the dominance of the conversation. whether a speaker do...
abstract background cancer diagnosis may cause deep emotional and affective problems in patients and their families.nowadays, however, despite its rising prevalence,cancer is no longer synonymous with death. given the significance of emotional well-being in cancer patients, we decided to assess the frequency of psychological problems in seven to seventeen yearolds with acute lymphoblastic leuke...
this study is an outlook of iranians religious practices and customs in eras such as nasser one. it attempts to answer the main question, "religious practices and ceremonies in the society during naseri ruling" and other subsidiary questions with scientific and historical theories. iran was a traditional and religious community . people abided by their religious practices and duties within reli...
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