Due to resource constraint of WSNs, it may be unnecessary or impossible to provide full coverage in many applications. Instead, partial coverage is enough to satisfy user requirements. Meanwhile, by applying partial coverage, network lifetime can be prolonged remarkably which is a primary goal of WSNs. In this paper, we investigate the pPercent Coverage Problem which only requires that p% of th...

In this paper, I estimate the causal effect of attending a selective college on a student’s academic performance. My results differ from previous studies, because I estimate a local effect, identified only for students who enroll in a selective college but would not have been able to without the guaranteed admissions granted to them by Texas’ Top Ten Percent Law. Differing from many previous st...

Because proper interpretation of pulmonary function tests (PFTs) depends critically on the predicted normal values, the availability of new reference values, such as those from the National Health and Nutrition Examination Survey (NHANES)1 or the Health Survey for England,2 poses important challenges and evaluative opportunities for investigators/authors, respiratory care clinicians, and pulmon...

Background: Because total prostate-specific antigen (PSA) and, more recently, the percent free PSA are used to screen men for prostate cancer, population-based, ageand racespecific distributions are needed of both PSA tests among American men to estimate the effect of lowering the PSA threshold or widespread introduction of the free PSA test as an additional screening test. Methods: We did PSA ...