The earliest extant description of a surgical operation for the cure of cataract is that of Celsus, toho practiced medicine in Rome at the beginning of the Christian era. In his text De Meclicina he described in detail his method of couching, by which he inserted a bronze needle into the eye at the equator on the lateral side of ihe globe and depressed the cataract downward into the lower part ...

Suspensions of Salmonella typhimurium TA100 or TA1535 cells were exposed to pure enantiomeric forms or racemic mix tures of 3H-labeled benzo(a)pyrene ani/or syn-7,8-dihydrodiol9,10-epoxide. Diol-epoxide-induced cytotoxicity and mutation frequencies at the hisG and gpt loci were determined. Hydrolysates of diol-epoxide-modified bacterial DMA were also examined by high-performance liquid chromato...

EHRs can now be adapted to integrate seamlessly with existing research platforms. However, key challenges need to be overcome in order to provide a platform that functions across many EHR systems. The IHE Quality, Research and Public Health (QRPH) domain addresses the information exchange standards necessary to share information relevant to quality improvement in patient care and clinical resea...

The critical importance of integrating production, distribution, and inventory (PDI) operations has long been recognized by top management of many companies. Now. using (he laiest advances in Managemenl Science modeling and solution technology, an integruied computer-based PDI system has saved approximately $18 million dollars during its first three years of implemenlalion for a major national ...

Smte-oi-rbe-art ítem response theo,y (IRT) models use logistie functions exclusivcly as their ítem response functions (IREs). Logistie funcííons mee Ihe reqrtírements thai iheir range is che unit iníerval ami íhat they are monotonically increasing. bur they upase a parameter ipace whose dimensions can only be assigned a meíaphoñcal interpretation in the context of cesting. Applications of 1RT m...

We study the problem of guaranteeing synchronous message deadlines in communication networks where the timed token medium access control protocol is employed. Synchronous capacity, defined as ihe maxrmum time for which a node can transmit its synchronous messages every time it receives the token, is a key parameter in the control of synchronous message transmission. To ensure the iransmission o...

We thank Dr Bing Hu for his interest about our publication, and we read with attention his similar cases. It is interesting to note that intramural esophageal dissection (IED) is characterized by transverse and longitudinal separation of the mucosal and submucosal layers of the esophageal wall, with or without perforation, and it is also known as intramural hematoma of the esophagus (IHE). Howe...

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