fit testing Articles
-
Application of L–moments for IDF determination in an Austrian basin
The aim of this paper is to evaluate a precise intensity–duration–frequency (IDF) relation for a small catchment area which is situated at the north part of Graz in Austria. In order to determine the probability of occurrence of any rainfall event, the frequency distribution, which can fit past characteristics on the magnitude and the probability of occurrence of such rainfalls, ...
-
Identification of suitable copulas for bivariate frequency analysis of flood peak and flood volume data
Multivariate flood frequency analysis, involving flood peak flow, volume and duration, has been traditionally accomplished by employing available functional bivariate and multivariate frequency distributions that have a restriction on the marginals to be from the same family of distributions. The copula concept overcomes this restriction by allowing a combination of arbitrarily chosen marginal ...
-
Assessing the vulnerability of different age groups regarding flood fatalities: case study in the Philippines
This study aimed to identify age groups vulnerable to flood fatalities and quantify their vulnerability by means of statistical methods. First, the study obtained data of 122 victims directly resulting from five flood disasters in the Philippines over the period 2010–2013 which was used to compare the number of flood fatalities in each age group with the population numbers. The chi-square ...
-
9 Things Your Respiratory Protection Program Must Include
Osha Respiratory Protection Standard The OSHA Respiratory Protection Standard 29 CFR 1910.134 has many requirements in addition to respirator fit testing. If respirators are worn by any employees, companies must have a written Respiratory Protection Program. The one exception is if the only respirators in use are those voluntarily worn by employees, then a written program is not required. But ...
-
Application of L-moment for evaluating drought indices of cumulative precipitation deficit (CPD) and maximum precipitation deficit (MPD) based on regional frequency analysis
Two indices of cumulative precipitation deficit and maximum precipitation deficit are used for assessing the severity of drought of a certain year such that a regional frequency analysis has been carried out by L-moment. In this paper, 11 synoptic stations in Isfahan province, Iran with a semi-arid environment have been used. Hosking homogeneity test is applied for identifying a homogeneous ...
-
Application of response surface methodology to optimize the fabrication of ZnCl2-activated carbon from sugarcane bagasse for the removal of Cu2+
The present study focused on the application of response surface methodology to optimize the fabrication of activated carbon (AC) from sugarcane bagasse for adsorption of Cu2+ ion. The AC was synthesized via chemical activation with ZnCl2 as the activating agent. The central composite design based experiments were performed to assess the individual and interactive effect of influential ...
-
Application of Box–Behnken design for modeling of lead adsorption onto unmodified and NaCl-modified zeolite NaA obtained from biosilica
The main objective of the present study was to optimize lead adsorption onto zeolite NaA. For this purpose, to synthesize zeolite NaA under hydrothermal conditions, local wheat husk was precleaned with chemical treatment using hydrochloric acid solution. The unmodified (ZU) and NaCl-modified (ZN) zeolites were characterized by Brunauer–Emmett–Teller, scanning electron microscopy coupled with ...
-
Getting back to work—Safely!!
We Can Help You Develop a Plan That is Safe and Effective to Re-Open Your Facility. Atlantic Environmental, Inc. has 42 years (1978-2020) in developing plans for worker health and safety. We follow CDC, OSHA, AIHA, and ASSP guidelines on re-opening following the COVID-19 Pandemic. We can tailor them to your specific facility(facilities). This includes, (but not limited to): General ...
-
Getting Back To Work—Safely!!
Posted by atlanticei If you need COVID-19 Recovery assistance discussed in this article, call us at 1-800-344-4414 or e-mail us at info@atlenv.com for details and a free estimate. Written By: Robert E. Sheriff, MS, CIH, CSP We Can Help You Develop a Plan That is Safe and Effective to Re-Open Your Facility. Atlantic Environmental, Inc. has 42 years (1978-2020) in developing plans for worker ...
-
Common Mistakes in Compliance with OSHA Standard for Respiratory Protection
Year after year, citations for violations of the Respiratory Standard 1910.134 consistently remain in the TOP 5 most cited OSHA violations. Don’t kid yourself, respiratory protection is a complex subject. You cannot just arbitrarily decide that “it looks dusty out there, I guess I will have the workers wear dust masks.” Here are some of the most common mistakes made by ...
-
Iron corrosion as a factor contributing to haloacetic acids formation in the distribution system: experimental assessment and model development
In this paper, the results of an experimental investigation into four potential explanatory factors (i.e. Fe(II) ions, pH, phosphate and reaction time) with different levels, and their influence in the formation of haloacetic acids (HAAs) in water samples are presented. This study revealed that Fe(II) ions (p = 0.0001), phosphate based corrosion inhibitor (p = 0.01) and pH (p ...
-
Pandemic preparedness - Respiratory protection 101
Has the recent media coverage regarding the spread of the H1N1 virus caused your organization to reconsider whether you need a respiratory protection plan for your employees? If so, you’re not alone. David Lahoda, Managing Editor of OSHA Watch and contributor to OSHA Healthcare Advisor, recently blogged on the wake-up call many of us have received as we rush to get our respiratory protection ...
-
Beyond the Bloodborne Pathogen Standard
Are you considering the full range of applicable OSHA Standards for your healthcare facility? Healthcare facilities are a highly regulated industry and many hospitals and ambulatory care settings work hard to reach and maintain appropriate accreditation goals. Much focus is placed on patient safety and the myriad of other quality measures healthcare facilities are required to meet. Federal ...
-
Enabling innovative thinking: fostering the art of knowledge crafting
In the industrial revolution, the mechanical toolmakers became the most critical element in the economic chain of production. It was, after all, the toolmakers who made all the other factories possible. In the age of knowledge and high performance organisations, the toolmakers are those who generate the operating knowledge used in every other organisation. Software is probably the best example of ...
-
A hierarchically defined fault pattern generator using genetic algorithm
Test generation using fault algorithms is a complex procedure. This paper presents a hierarchical approach for test vector generation, which searches for a compact set of test patterns, in an otherwise large search space. Genetic algorithms (GAs) have been effective in solving many search and optimisation problems. Since test generation is a search process over a large vector space, it is an ...
-
Optimization of pyrocatechol violet biosorption by Robinia pseudoacacia leaf powder using response surface methodology: kinetic, isotherm and thermodynamic studies
We have investigated the biosorption of pyrocatechol violet (PCV) from aqueous solutions by Robinia pseudoacacia tree leaves as a low-cost and eco-friendly biosorbent. A full factorial design was performed for screening the main variables and their interactions, which reduces the large total number of experiments. Results of the full factorial design (24) based on an analysis of variance ...
-
Weather SDM: estimating snow density with high precision using snow depth and local climate
Snow density is an important measure in hydrology used to convert snow depth to the snow water equivalent (SWE). A model developed by Sturm, Tara and Liston predicts the snow density by using snow depth, the snow age and a snow class defined by the location. In this work this model is extended to include location and seasonal weather-specific variables. The model is named Weather Snow Density ...
-
Characterisation of arsenic contamination in groundwater by statistical methods
Statistical investigation on groundwater arsenic concentration data of southwest Bangladesh was performed. Two data sets of 1998–99 and 2002–03 were selected for this analysis. Summary statistics of the data shows that the mean concentration exceeds the Bangladesh limit (0.05 mg/l) in all areas. Normality of arsenic concentration data was checked by frequency histogram, skewness coefficient and ...
-
Eutrophication forecasting and management by artificial neural network: a case study at Yuqiao Reservoir in North China
Yuqiao Reservoir is the potable water supply source for a city with a population of more than 14 million. Eutrophication has threatened the reliability of drinking water supplies and, therefore, the forecasting systems for eutrophication and sound management become urgent needs. Water temperature and total phosphorus have long been considered as the major influencing factors to eutrophication. ...
-
Two-phase reactors applied to the removal of substituted phenols: comparison between liquid-liquid and liquid-solid systems
In this paper, a comparison is provided between liquid-liquid and liquid-solid partitioning systems applied to the removal of high concentrations of 4-nitrophenol. The target compound is a typical representative of substituted phenols found in many industrial effluents while the biomass was a mixed culture operating as a conventional Sequencing Batch Reactor and acclimatized to 4-nitrophenol as ...
Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you