We performed a sanity check of public keys collected on the web. Our main goal was to test the validity of the assumption that different random choices are made each time keys are generated. We found that the vast majority of public keys work as intended. A more disconcerting finding is that two out of every one thousand RSA moduli that we collected offer no security. Our conclusion is that the...

 3つの異なる練習方法でダンスの学習効果を検証した.  marking練習は full-out練習よりも学習効果がある.  markingと full-outと共にmental simulation練習よりも学習効果がある.

Algorithmic debugging is a semi-automatic method for locating bugs in programs. An algorithmic debugger asks a user a series of questions about the intended behaviour of the program. Here we present two new methods that reduces the number of questions a user must answer to locate a bug. First, we describe a heuristic based on comparing computations of the same program with different inputs. Bes...

Although future Medicare costs are highly uncertain, reasonable projections of those costs suggest a major financing problem. The Balanced Budget Act of 1997 will provide temporary relief, although it introduced some new problems, including its geographic adjustment of Medicare+Choice rates. For the future we propose a premium-support system and an expanded benefits package. Such a system would...

AKI is the loss of kidney function over a period of hours to days. Although the definition is easily stated, operationalizing it in a form that can be readily applied in clinical practice and in research settings has been a challenge. Markers of glomerular filtration, including serum creatinine and urine output, generally lag behind the actual onset of parenchymal kidney injury and reliance on ...