Like any big U.S. city, Houston has a community of eager entrepreneurs hoping for a breakthrough. This month, the Houston Chronicle looks at three local startups with ideas to address specific problems in healthcare. One has embedded fiber-optic sensors in a disposable pad for nursing-home residents to track whether a patient is in bed, having a seizure or breathing abnormally. Another has developed a web-based program for hospitals to spot and manage safety lapses, while the third produces software to scan and analyze medical images, and let users share files online. Article