Direct-Indirect Lighting Fixtures, Fan on Grinder Spindle, and more

Supplemental greenhouse lighting: Return on Investment for LED and HPS fixtures

Direct Lighting Calculation

The details of doing a Monte Carlo direct lighting calculation are presented. For direct lighting from multiple luminaires, a method of sending one shadow ray per viewing ray is presented, and it is argued that this is preferable for scenes with many luminaires. Some issues of the design of probability densities on unions of luminaire surfaces are discussed.

The Direct and Indirect Effects of Gratitude and Optimism on the Marital Satisfaction

Objective: The major focus of present literature on marital satisfaction is about the processes that weaken it in couples. In contrast, positive factors that may contribute to the prosperity of couples’ relationships are less widely considered. Gratitude is one of the factors that its role and in particular, the pathways that associate it to marital satisfaction are not studied. The current stu...

O12: Direct and Indirect Insults of Traumatic Brain Injury

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Direct and Indirect Representation

How much can a constituency influence the power of its representative in the legislature? We develop a theoretical model of the constituency basis of legislator influence. The key players in the model are interest groups who may receive targeted transfers from the legislature. The model predicts that the amount of transfers that such groups receive is increasing in their ability to help a party...