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1. Effect of innate preferences, conditioning and adult experience on the attraction of Aphidius ervi (Hymenoptera: Braconidae) toward plant volatiles

Creator:
Rodríguez, Luis C., Fuentes-Contreras , Eduardo, and Niemeyer, Hermann M.
Type:
article, model:article, and TEXT
Subject:
Aphidius ervi, Sitobion avenae, Acyrthosiphon pisum, wheat, alfalfa, olfactometry, behaviour, preferences, conditioning, parasitoids, and aphids
Language:
English
Description:
The aphid parasitoid Aphidius ervi was collected and subsequently reared on Sitobion avenae on wheat or Acyrthosiphon pisum on alfalfa. Parasitoids from both origins were exposed in an olfactometer to alfalfa or wheat volatiles after plant experience (wheat or alfalfa) or after oviposition experience (S. avenae on wheat or A. pisum on alfalfa). The results showed the importance of adult experience, conditioning and innate preferences on the responses of A. ervi toward volatiles and provided a mechanistic explanation to the high prevalence of A. ervi on aphids on cereals and legumes in central Chile.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

2. Some issues of fuzzy querying in relational databases

Creator:
Hudec, Miroslav and Vučetić, Milian
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
membership functions, aggregation functions, preferences, commutative queries, non-commutative queries, empty and overabundant answers, and application
Language:
English
Description:
Fuzzy logic has been used for flexible database querying for more than 30 years. This paper examines some of the issues of flexible querying which seem to have potential for further research and development from theoretical and practical points of view. More precisely, defining appropriate fuzzy sets for queries, calculating matching degrees for commutative and non-commutative query conditions, preferences, merging constraints and wishes, empty and overabundant answers, and views on practical realizations are discussed in this paper. Suggestions how to solve them and integrate into one compact solution are also outlined in this paper.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public