This paper describes features of a new strongly typed, compiled programming language, called LEDA. LEDA attempts to combine aspects of both imperative (value-oriented) and logical (relation-oriented) styles of programming. Logical behavior is introduced by means of a new programming structure, called a relation. Relations have similarities to functions and procedures, but are distinct from both...

Batı resim sanatında “Leda ve Kuğu (Leda and swan)” mitini yansıtan eserler Rus M.A. Vrubel’in “Kuğu Çariçe (Tsarevna lebed)” eseri, içinde barındırdıkları kuğu figürleri ile Doğu mitlerinin birer yansımadır. Bu yansıma Yunan mitolojisinde Slav mitlerini barından masallarında bir insanın biçim değiştirerek kılığına girmesi ilgili anlatıları kapsamaktadır. Ancak kuğuların dönüşüm öyküleri altınd...

The low-energy demonstration accelerator (LEDA) is an operational 6.7-MeV, 100-mA, cw proton accelerator consisting of an injector, radio-frequency quadrupole (RFQ), and all associated integration equipment. Achieving this unprecedented level of performance (670kW of beam power) from an RFQ required a number of design innovations. We highlight a number of those more-significant technical advanc...

In this paper we describe robust and eecient implementations of two graph connectivity algorithms. The implementations are based on the LEDA library of eecient data types and algorithms 18]. Moreover, we provide experimental evaluations of the implemented algorithms and we compare their performance to other graph connectivity algorithms currently implemented in LEDA. The rst algorithm is the Ka...

The LEDA RFQ, a 350-MHz continuous wave (CW) radio-frequency quadrupole (RFQ), successfully accelerated a 100-mA CW proton beam from 75 keV to 6.7 MeV. We have accumulated 111 hr of beam on time with at least 90 mA of CW output beam current. The 8-mlong RFQ accelerates a dc, 75–keV, ~106-mA H beam from the LEDA injector with ~94% transmission. When operating the RFQ at the RF power level for wh...

En el Modernismo latinoamericano son abundantes las apropiaciones de elementos la mitología grecorromana. Entre ellos, propongo analizar reescrituras del mito Leda y cisne que llevaron a cabo Rubén Darío en Cantos vida esperanza (1905) Delmira Agustini Los cálices vacíos (1913). diálogo se establece entre estos poemas (la respuesta Darío) ambos hipotexto mítico es posible ver cómo traman cierta...

In 1995 my students and I developed Leda, a multiparadigm language based on the Pascal model. Leda allowed programmers to create abstractions in an object-oriented, functional, or logic programming style. More recently we have been interested in recreating this work, but this time using Java as the language basis. The objective to to add as few new operations as possible, and to make these oper...