A knowledge-based system with learning for computer communication network design

Computer communication network design is well-known as complex and hard. For that reason, the most effective methods used to solve it are heuristic. Weaknesses of these techniques are listed and a new approach based on artificial intelligence for solving this problem is presented. This approach is particularly recommended for large packet switched communication networks, in the sense that it permits a high degree of reliability and offers a very flexible environment dealing with many relevant design parameters such as link cost, link capacity, and message delay

Human and automation: a matter of cooperation.

International audienceMost of the time, machine design should be considered as human-machine system design in order to solve human-machine cooperation problems. The traditional levels of automation should be re-interpreted in terms of cooperation requirements. A framework is proposed in order to categorise car-driving assistance devices on the basis of human-machine cooperation

Proposed CGIAR Initiative on Aquaculture: Resolving Outstanding Issues

Discussion paper by an ad hoc subcommittee established to review issues raised at TAC 45 about a proposal for a CGIAR initiative on aquaculture, and to provide additional background information. The purpose of the paper was to establish the basis for a TAC decision.Agenda document, TAC 46

Role of the CGIAR in Coconut Research

Paper by an ad hoc TAC panel working from Gabrielle Persley's studies of the needs for internationally supported research on the coconut, in the context of previous TAC decisions on the priority of oilseeds in general. The paper reviews existing research programs, and discusses suitable priority areas within coconut research. The panel considered six number of institutional alternatives, including support to national institutions, and to ICRAF, IRRI and IBPGR. It recommended the establishment of a new International Coconut Research Council.Agenda document, TAC 52

Variabilidad en el indumento de Phaseolus vulgaris var. aborigineus (Fabaceae)

The indument of Phaseolus vulgaris L. var. aborigineus (Burkart) Baudet, a native bean from Argentina, potential source for improvement of cultivated varieties, was compared between different genetic lines. Seeds collected from wild, weedy forms and presumptive hybrid individuals in two distant latitudes were sown in two sites of Buenos Aires University Campus (field and greenhouse). Two type of trichomes were found, which differenciate in length and shape. The pubescence density was significantly different between wild specimens from different latitudes and between culture sites for plants of a same procedence. This character could be involved in physical defences of these plants.El indumento de Phaseolus vulgaris L. var. aborigineus (Burkart) Baudet, un poroto nativo de la Argentina, potencial fuente para mejoramiento de variedades cultivadas, se comparó entre diferentes líneas genéticas. Semillas de individuos silvestres, tipos maleza y presuntos híbridos colectadas en dos latitudes distantes fueron sembradas en dos sitios del campus de la Universidad de Buenos Aires (campo e invernáculo). Se encontraron dos tipos de tricomas que se diferencian en longitud y forma. La densidad de la pubescencia fue significativamente distinta entre especímenes silvestres de distintas latitudes y entre sitios de cultivo para plantas de la misma procedencia; este carácter podría estar relacionado con las defensas físicas de estas plantas.Fil: Ojeda, Fabiana S.. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Biodiversidad y Biología ExperimentalFil: Amela García, María T.. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Biodiversidad y Biología ExperimentalFil: Hoc, Patricia S.. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Biodiversidad y Biología Experimenta

Variability in the indument of Phaseolus vulgaris var. aborigeous (Fabaceae)

The indument of Phaseolus vulgaris L. var. aborigineus (Burkart) Baudet, a native bean from Argentina, potential source for improvement of cultivated varieties, was compared between different genetic lines. Seeds collected from wild, weedy forms and presumptive hybrid individuals in two distant latitudes were sown in two sites of Buenos Aires University Campus (field and greenhouse). Two type of trichomes were found, which differenciate in length and shape. The pubescence density was significantly different between wild specimens from different latitudes and between culture sites for plants of a same procedence. This character could be involved in physical defences of these plants.Fil: Ojeda, Fabiana Soledad. Consejo Nacional de Invest.cientif.y Tecnicas. Oficina de Coordinacion Administrativa Ciudad Universitaria. Plan. Toxicas y Medic., Metab. de Comp. Sinteticos y Nat.- Hongos que Intervienenen la Deg.; Argentina;Fil: Amela Garcia, Maria Teresa. Consejo Nacional de Invest.cientif.y Tecnicas. Oficina de Coordinacion Administrativa Ciudad Universitaria. Plan. Toxicas y Medic., Metab. de Comp. Sinteticos y Nat.- Hongos que Intervienenen la Deg.; Argentina;Fil: Hoc, Patricia Susana. Consejo Nacional de Invest.cientif.y Tecnicas. Oficina de Coordinacion Administrativa Ciudad Universitaria. Plan. Toxicas y Medic., Metab. de Comp. Sinteticos y Nat.- Hongos que Intervienenen la Deg.; Argentina

How do hotel and tourism students select internship employers? a segmentation approach

The major objective of this study is to segment the hotel and tourism students into groups based on their perceived importance of the criteria for selecting internship employers, which is grounded in the expectancy theory and job choice framework. Drawing from a self-administered survey of 273 hotel and tourism management college students in Hong Kong, the study used cluster analysis to generate four clusters of students, namely learning enthusiasts, social support seekers, brand seekers, and school followers. Chi-square tests showed that school followers generally do not have internship experience. Implications for educators and internship employers are discussed in the paper

Plant Genetic Resources in the CGIAR

Paper revised from a version considered at TAC 41 by an Ad hoc Working Group on Plant Genetic Resources composed of TAC and Center representatives. The paper deals with the roles of IBPGR and the nine commodity-oriented IARCs in the international collection, evaluation, and preservation of plant genetic resources. This ad hoc group recommended the establishment of a continuing Inter-Center Working Group on Plant Genetic Resources composed of representatives of the ten centers, with a TAC observer. The continuing working group would advise TAC and the center directors on twelve specified issues. The paper includes a table of genetic resource activities at the IARCs by commodity. Agenda document at TAC 41 and TAC 42, October-November 1986, and March 1987