Work-based resources as moderators of the relationship between work hours and satisfaction with work-family balance.

This study reports an investigation of the relationships of work hours, job complexity, and control over work time to satisfaction with work-family balance. Based on data from a sample of 570 telephone call center representatives, a moderated hierarchical regression analysis revealed that work hours were negatively related to satisfaction with work-family balance, consistent with the resource drain perspective. Job complexity and control over work time were positively associated with satisfaction with work-family balance. Control over work time moderated the relationship such that as work hours rose, workers with low control experienced a decline in work-family balance satisfaction, while workers with high control did not. Results encourage greater research attention to work characteristics, such as job complexity and control over work time, and skills that represent resources useful to the successful integration of work and family demands. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Desalting 36,000 ppm well water with electrodialysis — a 5-year report

The author reported on the design and initial operation of this unidirectional electrodialysis plant in July 1977. The 36,000 ppm TDS well water is saturated with calcium sulfate and contains high levels of hydrogen sulfide (reported as high as 190 ppm). The 42,000 USGPD plant has now been in service for nearly 5 years and has never failed to provide the potable water needs of the desert camp that it serves.The operation of the pretreatment section of the plant has been modified to reduce the amount of lime fed to the solids contact clarifier thereby reducing the quantity of acid required for pH reduction of the feed water.The only major modification to the electrodialysis portion of the plant has been the installation of new type anion membranes. The membrane stacks are now primarily equipped with two types of anion membranes, both of which operate at a lower electrical resistance and higher ion transfer efficiency. The result of these more efficient anion membranes is a lower power consumption and higher production rate. Improvements to the electrode system have resulted in continuous membrane stack operating periods of over 6000 hours between disassemblies.Equipment to increase the capacity of the plant by 50% is scheduled for installation and start-up in 1981.