A survey of commercial laundry detergents – how effective are they? Part I: powders

The effectiveness of 11 non-phosphate containing powdered detergents and 12 phosphate containing powdered detergents, of varying formulations, in cleaning a standard soiled fabric in soft water (5 ppm) were evaluated. It was found that in soft water there were no differences between washing with either phosphate or non-phosphate detergent. In general, washing with detergents which contained phosphates did give somewhat better results in warm water. Detergents that contained bleach as an additive did not result in a whiter fabric.     

The effects of water hardness level on washing quality using commercial laundry detergents

The water hardnesses were determined for 10 samples of water. A wide variation of water hardnesses were found ranging from very soft to very hard. The effectiveness of six commercial laundry detergents of different formulations were evaluated. The detergent containing a non-ionic surfactant with a phosphate builder was found to give the best whiteness results, regardless of water hardness. Because of the possible environmental problems associated with the use of phosphates, consumers may wish to select the next most effective detergent formulation, which varied between water samples.     

Just Tell Me! Making Alternative Dispute Resolution Systems Fair

This study investigates fairness perceptions of alternative dispute systems utilizing a policy capturing design and a sample of four hundred and fifty non‐union, non‐management employees from seven organizations. The communication surrounding the decision, the level of employee input, and the composition of the grievance panel had larger effects on overall fairness perceptions than did outcome. Unfavorable outcomes that were reached by fair processes generate higher distributive justice ratings than favorable outcomes reached by unfair processes.     

COST,QUALITY, AND ENVIRONMENTAL TRADEOFFS FOR PRINTED CIRCUIT BOARD ASSEMBLY

After exhausting all “pollution prevention pays” opportunities, further efforts towards environmental protection often engender some type of cost to the manufacturer. Then, designers must weigh tradeoffs between environmental impacts and equally pressing needs to reduce costs, improve product quality, and reduce cycle time: all while meeting customer demands, which are the driving force behind the design process. Although there is a growing market for “green” products as customers' desire to be environmentally responsible increases, it is extremely difficult to accurately assess the customer's actual willingness to pay for environmental protection. This paper first briefly reviews methods for assessing customer preferences. Then, it presents a decision model for use by design engineers to assist in making these tradeoffs between cost, quality, and environmental impact in which customer preferences can be reflected in weighting factors assigned by the design engineer. Qualitative HOQ information is used as a starting point to derive a mathematical programming formulation for multiobjective optimization. Finally, an illustrative example for printed circuit board assembly is provided.     

The effect of water hardness on washing performance of built and unbuilt surfactants

Five different surfactants were used at 2.0% concentrations. The most and least effective were found to be Synthrapol N and Ahcowet RS respectively; based on their rating of whiteness index. Synthrapol N and Ahcowet RS were evaluated with the addition of sodium carbonate, sodium tripolyphosphate and a 1:1 combination of the two builders. In both cases the addition of a builder improved the cleaning efficiency of the surfactant. Although each builder alone improved the cleaning efficiency, the combination of sodium carbonate and sodium tripolyphosphate improved efficiency at a lower total concentration.     

Homemakers' household-work time in single-parent and two-parent families

The purpose of this study was to determine if a significant difference existed between single-parent family homemakers and two-parent family homemakers regarding the amount of time spent in selected household tasks. The examination of the impacts of selected socio-demographic variables on the amount of time spent in total household work and the component tasks by the homemakers was also a part of this study.     

Bargaining Effects of the Mandatory-Permissive Distinction

This study uses a laboratory experiment to examine empirically the effect of the mandatory permissive distinction on the negotiation of wages, employment guarantees, and advertising expenditures. Results suggest that negotiators spend more time bargaining over a smaller settlement range when an issue is mandatory than when it is permissive. Further, tentative findings provide no evidence that negotiators can circumvent the distinction through the use of tradeoffs across issues or bargaining power.