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181.
Thomas G. Bobick Author Vitae E.A. McKenzie Jr. Author Vitae Author Vitae 《Journal of Safety Research》2010,41(3):203-211
Introduction
Fall-related occupational injuries and fatalities are serious problems in the U.S. construction industry, especially incidents related to unguarded holes. The National Institute for Occupational Safety and Health, Division of Safety Research, Morgantown, WV conducted a project to evaluate the effectiveness of guardrail systems to prevent falls through roof and floor holes.Methods
Two commercial edge-protection products were evaluated when used as perimeter guarding around a roof hole. Installations of the commercial products were compared to job-built guardrails constructed of 2″ × 4″ construction-grade lumber. Occupational Safety and Health Administration (OSHA) regulations require that “a force of at least 200 pounds” must be supported by the top rail of a guardrail system “in any outward or downward direction at any point along the top edge.” A laboratory testing system was developed to evaluate this requirement. A dynamic 200-lb force was generated against the top rail using a weighted manikin mounted on a hinged steel frame. Nine construction workers, who served as test subjects, each built five different guardrail configurations.Results
All 45 configurations met the 200-lb OSHA requirement. Installation time for one commercial product was 32% quicker than the job-built configuration (25.6 min vs. 37.9 min).Impact on Industry
This study: (a) indicates that the two edge-protection products can be used as perimeter guarding; (b) highlights the importance of using proper materials and fasteners to construct guardrails to protect workers from falling into unguarded roof and floor holes; and (c) discusses an overall-strength-testing methodology that can be used by fall-protection researchers. 相似文献182.
Problem
Drilling overhead into concrete or metal ceilings is a strenuous task done by construction workers to hang ductwork, piping, and electrical equipment. The task is associated with upper body pain and musculoskeletal disorders. Previously, we described a field usability evaluation of a foot lever and inverted drill press intervention devices that were compared to the usual method for overhead drilling. Both interventions were rated as inferior to the usual method based on poor setup time and mobility.Method
Three new interventions, which differed on the design used for aligning the drilling column to vertical, were compared to the usual method for overhead drilling by commercial construction workers (n = 16).Results
The usual method was associated with the highest levels of regional body fatigue and the poorest usability ratings when compared to the three interventions.Conclusion
Overall, the 'Collar Base' intervention design received the best usability ratings.Impact on Industry
Intervention designs developed for overhead drilling may reduce shoulder fatigue and prevent subsequent musculoskeletal disorders. These designs may also be useful for other overhead work such as lifting and supporting materials (e.g., piping, ducts) that are installed near the ceiling. Workplace health and safety interventions may require multiple rounds of field-testing prior to achieving acceptable usability ratings by the end users. 相似文献183.
Effectiveness of a worker-worn electric-field sensor to detect power-line proximity and electrical-contact 总被引:1,自引:0,他引:1
Shengke Zeng Author Vitae John R. Powers Author VitaeAuthor Vitae 《Journal of Safety Research》2010,41(3):229-239
Problem
Construction workers suffer the most electrocutions among all industries. Currently, there are no electrical contact warning devices on the market to protect workers. This paper proposes a worker-worn electric-field sensor. As the worker is in proximity to, or in contact with, a live power-circuit, the sensor sets off an audible/visual warning alarm. The sensor also has the potential to wirelessly trip a wireless-capable circuit breaker, and to trigger a wireless transmitter to notify emergency response of an electrical contact.Methods
An experiment was conducted to measure electric-field variation on simulated human-wrists (10 defrosted hog-legs) in various proximities and in electrical-contact to a simulated power-circuit. The purpose of these tests was to determine the feasibility of developing a worker-worn electric-field detection sensor for use in protecting workers from contact with energized electrical conductors.Results
This study observed a significant electric-field-magnitude increase as a hog-leg approaches the live-circuit, and the distinct electric-field-magnitude jump as the leg contacts with the live-circuit. The observation indicates that this sensor can be an effective device to warn the workers of electrical hazards. Additionally, the sensor has the potential to wirelessly trip a wireless-capable circuit-breaker and trigger a wireless transmitter (such as a cell phone) to notify an emergency response. The prompt notification prevents the worker from further injury caused by postponed medical-care.Impact on Industry
Widespread use of this sensor could lower electrocution and electrically related injury rates in the construction industry. 相似文献184.
Hester J. Lipscomb Author Vitae James Nolan Author Vitae Author Vitae John M. Dement Author Vitae 《Journal of Safety Research》2010,41(3):241-245
Problem
Nail guns are a common source of acute, and potentially serious, injury in residential construction.Method
Data on nail gun injuries, hours worked and hours of tool use were collected in 2008 from union apprentice carpenters (n = 464) through classroom surveys; this completed four years of serial cross-sectional data collection from apprentices. A predictive model of injury risk was constructed using Poisson regression.Results
Injury rates declined 55% from baseline measures in 2005 with early training and increased use of tools with sequential actuation. Injury rates declined among users of tools with both actuation systems, but the rates of injury were consistently twice as high among those using tools with contact trip triggers.Discussion and impact
Nail gun injuries can be reduced markedly through early training and use of tools with sequential actuation. These successful efforts need to be diffused broadly, including to the non-union sector. 相似文献185.
Matt Gillen Author Vitae 《Journal of Safety Research》2010,41(3):289-299
The U.S. National Institute for Occupational Safety and Health (NIOSH) conducts research to improve and protect the health and safety of workers. This paper describes the experience of the NIOSH Construction Program with two recent program planning initiatives intended to improve the program: (a) an independent external review of work over the past decade and (b) the development of strategic goals organized into a “National Construction Agenda” to guide a decade of future work. These goals, developed with input from construction industry stakeholders and researchers, are a part of the NIOSH National Occupational Research Agenda (NORA) initiative. The NORA goals are intended to provide an ambitious set of goals for all construction stakeholders to work together on. Both efforts relate to insuring the relevance and impact of research, reflecting an emerging policy perspective that research programs should be judged not just by the quality and quantity of science produced, but by the industry impact and tangible benefit resulting from the research. This paper describes how views on research planning have evolved to incorporate lessons learned about how research leads to improved safety and health for workers. It also describes the process used to develop the goals and the resulting strategic and intermediate goals that comprise the National Construction Agenda. 相似文献
186.
Ann Hedlund Author Vitae Mattias Åteg Author VitaeAuthor Vitae Gunnar Rosén Author Vitae 《Journal of Safety Research》2010,41(2):145-151
Problem
Workers' motivation to actively take part in improvements to the work environment is assumed to be important for the efficiency of investments for that purpose. That gives rise to the need for a tool to measure this motivation.Method
A questionnaire to measure motivation for improvements to the work environment has been designed. Internal consistency and test-retest reliability of the domains of the questionnaire have been measured, and the factorial structure has been explored, from the answers of 113 employees.Results
The internal consistency is high (0.94), as well as the correlation for the total score (0.84). Three factors are identified accounting for 61.6% of the total variance.Discussion
The questionnaire can be a useful tool in improving intervention methods.Impact on Industry
The expectation is that the tool can be useful, particularly with the aim of improving efficiency of companies' investments for work environment improvements. 相似文献187.
A.E. af Wåhlberg Author Vitae 《Journal of Safety Research》2010,41(4):381-383
Problem
Studies on individual differences in traffic safety report differently on their methodologies, and use different statistics, and these are therefore difficult to compare and meta-analyze.Method
Based upon a previous, extensive review and meta-analysis of the traffic safety literature, several recommendations are made about what features of the methodology of studies on individual differences (including evaluations) in safety need to be reported to facilitate interpretation and meta-analysis. Similarly, some basic types of statistical values are recommended.Impact on Industry
The accumulation of knowledge about individual differences in traffic safety would be facilitated if scientific authors and journals adhered to these guidelines. 相似文献188.
A.E. af Wåhlberg Author Vitae 《Journal of Safety Research》2010,41(4):331-338
Introduction
Offending drivers are often re-educated, but these courses have seldom been shown to have any safety effects.Method
An on-line improvement course for offending drivers below the age of 25 was evaluated with several driver inventories.Results
The drivers reported higher levels of aggression, stress, sensation seeking, drunk driving, and driving violations, six months after the course than before. However, these levels were lower than those of controls, indicating that the initially low levels for the education group were due to socially desirable responding, as measured by a lie scale, an effect that waned after the course.Discussion
The results can be interpreted as a positive effect of the education, although this conclusion is tentative and not in agreement with all effects in the data.Impact on industry
The results are in disagreement with previous evaluation studies using the same or similar instruments, and show the need to include controls for social desirability in self-report studies. 相似文献189.
Charles M. Farmer Author Vitae Bevan B. Kirley Author VitaeAuthor Vitae 《Journal of Safety Research》2010,41(1):39-2367
Objectives
The objective was to determine if teenage driving behavior improves when a monitoring and feedback device is installed in the teen's vehicle.Methods
Vehicles of 85 teenage drivers were fit with a device that detected all instances of sudden braking/acceleration, speeding, and nonuse of seat belts. Drivers were assigned randomly to one of four research groups, differing in whether or not an alert sounded in the vehicle and whether or not parents were given access to websites containing notification records. Time trends in event rates per mile traveled were compared using Poisson regression.Results
Seat belt use improved when violations were reported to the parent websites, and improved even more when in-vehicle alerts were activated. Consistent reductions in speeding were achieved only when teenagers received alerts about their speeding behavior, believed their speeding behavior would not be reported to parents if corrected, and when parents were being notified of such behavior by report cards.Conclusions
Electronic monitoring of teenage drivers can reduce the incidence of risky behavior, especially seat belt nonuse. More complicated behavior is more difficult to change, however.Impact on Industry
Parent participation is key to successful behavioral modification, but it is yet to be determined how best to encourage such participation. 相似文献190.
We developed and tested a plant-based index of biological integrity (IBI) and used it to evaluate the existing reclamation
wetlands in Alberta’s oil sands mining region. Reclamation plans call for >15,000 ha of wetlands to be constructed, but currently,
only about 25 wetlands are of suitable age for evaluation. Reclamation wetlands are typically of the shallow open water type
and range from fresh to sub-saline. Tailings-contaminated wetlands in particular may have problems with hydrocarbon- and salt-related
toxicity. From 60 initial candidate metrics in the submersed aquatic and floating vegetation communities, we selected five
to quantify biological integrity. The IBI included two diversity-based metrics: the species richness of floating vegetation
and the percent of total richness contributed by Potamogeton spp. It also included three relative abundance-based metrics: that of Ceratophyllum demersum, of floating leafed species and of alkali-tolerant species. We evaluated the contribution of nonlinear metrics to IBI performance
but concluded that the correlation between IBI scores and wetland condition was not improved. The method used to score metrics
had an influence on the IBI sensitivity. We conclude that continuous scoring relative to the distribution of values found
in reference sites was superior. This scoring approach provided good sensitivity and resolution and was grounded in reference
condition theory. Based on these IBI scores, both tailings-contaminated and tailings-free reclamation wetlands have significantly
lower average biological integrity than reference wetlands (ANOVA: F
2,59 = 34.7, p = 0.000000000107). 相似文献