Live updates: Warriors vs. Lakers, Thursday at 7:30 p.m.

first_imgJoin us Thursday at 7:30 p.m. for live news and analysis when the Warriors face the Lakers in Los Angeles as LeBron James remains sidelined.The Warriors (53-24) take a Magic Number of 3 into the game and need a combination of three Warriors wins or Denver losses to clinch the top seed in the Western Conference. Golden State has just five games remaining in the regular season.The Lakers (35-43) have long been eliminated from the playoff hunt and will finish their highly disappointing …last_img read more

Athletics swept by Astros to close homestand with five straight losses

first_imgOAKLAND — Houston is a problem the Athletics may not be capable of solving.The Astros got run-scoring singles from Michael Brantley and Yuli Gurriel against Lou Trivino in the top of the 12th inning Sunday to send the Athletics to their fifth straight defeat and sweep a three-game series before a crowd of 23,144 at the Coliseum.At 29-30, the Athletics are 10 1/2 games behind the two-time defending American League … Click here if you’re unable to view the photo gallery on your mobile device.last_img read more

All About Vapor Diffusion

first_img Sign up for a free trial and get instant access to this article as well as GBA’s complete library of premium articles and construction details. Start Free Trial Already a member? Log in Building scientists talk about several different moisture transport mechanisms. Most of these mechanisms — for example, water entry due to a roof leak — are easy to understand. Other transport mechanisms, like vapor diffusion, aren’t quite as intuitive.First, some basic definitions. Water vapor is water in a gaseous state — that is, water that has evaporated. It is invisible.Water vapor diffusion is the movement of water vapor through vapor-permeable materials. Vapor diffusion happens through a solid material even when the material has no holes.A typical example of vapor diffusion happens when a material — for example, gypsum drywall installed on a wall — separates two zones. If the air on one side of the drywall is very damp, and the air on the other side of the drywall is very dry, moisture in the air will diffuse through the drywall.To understand how this happens, imagine how drywall takes on water when it is damp. On a dry day in Arizona, drywall is crisp. When scored with a sharp knife, it can be easily snapped. However, if a sheet of drywall is left for a week lying flat on a damp basement slab in Vermont, it gets limp and noodly. Drywall absorbs moisture like a sponge from either face, and it also dries out readily from either face via evaporation.If the drywall is screwed to a stud wall that separates a damp area from a dry area, the drywall absorbs moisture on its damp side. Moisture evaporates from its dry side. The moisture has moved through the drywall by diffusion.When water vapor diffuses through a vapor-permeable material, the driving force is either a vapor pressure difference (in which case the water vapor moves from the zone of higher vapor pressure to the zone of lower vapor pressure) or a… center_img This article is only available to GBA Prime Memberslast_img read more