Sunshine is the Best Disinfectant Once again, Pennsylvania has made national headlines as a pioneer in the public reporting of information related to medical quality. Now with the release of PHC4's report on hospitalacquired infections (HAI) in Pennsylvania, the state has focused a very bright light on a critical health care issue with national policy implications. Indeed, Pennsylvania is the f...

In this study, by recognizing geographical location changes of the sun-path diagram, we present a selection of sustainable architectural guidelines that influence the climatic element of sunshine. For this purpose, after the introduction of triple zones of the earth in terms of how the sun is exposed(include:Tropical, temperate and polar), the function of the earth's curvature to create geograp...