The playfair cipher operates on pairs of letters. The cipher text is broken into group of blocks, each block contains two letters. Encryption and decryption cipher depends on key search, which is a square matrix that contains 5x5 letters. The matrix contains every letter expect letter j. In this paper the cryptanalyst a playfair is presented using search techniques. It is a Memetic Algorithm, a...

Department of General Surgery, Rambam Medical Center, Haifa, Israel. Ami Mayo, MD, Surgeon; Yoram Kluger, MD, FACS, Chairman; and Associate Clinical Professor of Surgery, Israeli Institute of Technology, and Rappaort School of Medicine. Correspondence: Yoram Kluger, Department of General Surgery, Rambam Medical Center, POB 9602, Haifa, 31096, Israel. [email protected] ADF Health ISS...

A new method for building a reduced order circuit model, based on symbolic or numerical elimination of the internal circuit nodes, is presented. The circuit passivity is preserved unlike the majority of other approaches. A 1033 node RC circuit is reduced to an admittance with one pole and two zeros for a frequency range of three decades.

بإنتهاء الحرب العالمية الأولى عام 1918 م ، تكون بريطانيا قد خرجت من منتصرة إلا أنها كانت تعاني أزمة اقتصادية ومالية صعبة للغاية وجيش مُتعَب يحتاج إلى إعادة تأهيل . وقوات بحرية شبه مُدَمرة وفقدت ثلثي سفنها ومُعداتها ومدن مُهدمة وطرق وجسور خَرِبة وعلى الرغم ذلك فقد بسطت سيطرتها على مستعمراتها في القارة الهندية والخليج العربي وبلاد فارس والعراق وفلسطين وشرق الأردن وعدن ومضيق باب المندب وأجزاء الصومال والب...