Development of a Real Time System in Algol 68.

For various reasons, many Algol 68 compilers do not directly implement the parallel processing operations defined in the Revised Algol 68 Report. It is still possible however, to perform parallel processing, multitasking and simulation provided that the implementation permits the creation of a master routine for the coordination and initiation of processes under its control. The package described here is intended for real time applications and runs in conjunction with the Algol 68R system; it extends and develops the original Algol 68RT package, which was designed for use with multiplexers at the Royal Radar Establishment, Malvern. The facilities provided, in addition to the synchronising operations, include an interface to an ICL Communications Processor enabling the abstract processes to be realised as the interaction of several teletypes or visual display units with a real time program providing a useful service.

Run-time profiling of Algol 68-R programs using DIDYMUS and SCAMP

Information concerning the run-time behaviour of programs ("program profiling") can be of the greatest assistance in improving program efficiency. Two software devices have been developed for use on ICL 1900 Series machines to provide such information. DIDYMUS is probabilistic in approach and uses multi- tasking facilities to sample the instruction addresses used by a program at run time. It will work regardless of the source language of the program and matches the detected addresses against a loader map to produce a histogram. SCAMP is restricted to profiling Algol 68-R programs, but provides deterministic information concerning those language constructs that are monitored. Procedure calls to appropriate counting routines are inserted into the source text in a pre-pass prior to compilation. The profile information is printed out at the end of the program run. It has been found that these two approaches complement each other very effectively.

Influência do sistema anteoxidante da catalase no ciclo do glioxilato durante o estabelecimento pós-germinativo de cártamo (Carthamus tinctorius L.) e de girassol (Helianthus annuus L.)

Oilseeds are a high-value natural resource, due to its use as a substitute for petroleum. However, the storage time can reduce seed viability and oil quality. Therefore, scientific efforts have been made to provide a increment of storage time, germination rates and plant establishment of high-value oilseeds. The seedling establishment depends of the plant pass over the functional transition stage, characterized by a metabolic change from heterotrophic condition to autotrophic one. The storage oil mobilization is performed by β-oxidation process and the glyoxylate cycle. Also, the functional transition involves acclimation to photosynthetic condition, which generally includes the participation of antioxidant system and the reactive oxygen species, the latter are produced in various reactions of primary and secondary metabolism. In the present study, Catalase was inhibited during the functional transition of sunflower and safflower, after were performed many analyzes to elucidate the effects caused on the SOD and APX antioxidant systems. Also, were checked the changes in expression pattern of the glyoxylate cycle enzymes markers, ICL and MLS. It was observed that after CAT inhibition, the SOD and APX antioxidant systems allow the seedling establishment. Besides, was verified that both oilseeds can be accelerate the reverse mobilization and the photosynthetic establishment when Catalase activity has dramatically decreased

Juventudes partidárias portuguesas : que visão sobre o desenvolvimento global?

O ponto de partida da nossa reflexão passou pela dúvida em relação ao conhecimento aprofundado dos/as jovens portugueses relativamente às temáticas Globais e aos paradigmas que vêm sendo dominantes na última década: qual o grau de participação e mobilização dos/as jovens portugueses/as para as temáticas da Cooperação Internacional? Qual o seu papel enquanto Agentes na mobilização e na advocacia junto dos/as nossos/as decisores/as políticos/as?. Sabemos que, ao longo dos anos, a distância entre as intenções e os Tratados Internacionais e Declarações globais de princípios colide com as prioridades nacionais e a vontade dos Estados. A retórica política está muitas vezes a milhas da ação política real e de interesses privados. Por isso, procurámos envolver nesta pesquisa aqueles/as jovens que, já tendo responsabilidades representativas no sistema partidário, terão provavelmente no futuro responsabilidades governativas ou legislativas. Colocando as Juventudes Partidárias Portuguesas em cena, quisemos iniciar com estas uma discussão em torno de temáticas sobre Desenvolvimento Global, de forma a lançar as primeiras bases para um futuro trabalho conjunto que possa influenciar e reforçar a importância da área e das organizações que nela têm vindo a desenvolver atividades.