Résumé. Dans cet article, nous étudions de manière conjointe la construction et l’exploration visuelle d’une structure de classification pour de très grande base d’images. Pour garantir que la structure construite vérifiera les contraintes de taille nécessaires à sa visualisation dans une interface Web tout en reflétant les propriétés topologiques des données (clusters), nous combinons la class...

Extractives from silver birch (Betula pendula) can play an important role in the future bioeconomy by delivering feedstock, for instance, antioxidative applications. It is, therefore, inevitable to gain knowledge of distribution extractive content and composition different tissues tree estimating potential volumes valuable extractable compounds. This study examines compound such as outer inner ...

The classical theory of invariants of binary quartics is applied to the problem of determining the group of rational points of an elliptic curve deened over a eld K by 2-descent. The results lead to some simpliications to the method rst presented in (Birch and Swinnerton-Dyer, 1963), and can be applied to give a more eecient algorithm for determining Mordell-Weil groups over Q, as well as being...

Luostarinen, K. 2006. Effects of environmental and internal factors of trees and timber treatment on colour of dried birch (Betula pendula) wood. University of Joensuu, Faculty of Forestry. Wood of silver birch (Betula pendula) has good properties that lead to its extensive use in mechanical wood industries in Finland. However, a problem with sawn birch timber is the darkening of the wood durin...

Karlsson, LT. 2000. X f . i m r m . L usgenerulion oJ'hroadleaved lree .species in .soulhern Sweden EJJerls o$ . s i l v i r d f u m l ireafment.s mnd .seed disprsa l f rom surrounding .slnnds. Doctor's dissertation. ISSS 1401-67307 ISBN 91-576-6080-8 The objective of the present thesis was to examine the effects of silvicultural treatments and seed dispersal from surrounding stands on the esta...

The ongoing shifts in natural vegetation zones predict the expansion of European beech (Fagus sylvatica L.) into Eastern Baltic region, suggesting it will become a potential alternative to birch (Betula pendula Roth. and Betula pubescens Ehrh.) forest regeneration. For successful application regeneration material, an evaluation susceptibility disturbances (e.g., wind) is necessary for reliable ...

Let f be a newform of weight 2 on Γ0(N), and let Af be the corresponding optimal abelian variety quotient of J0(N). We describe an algorithm to compute the order of the component group of Af at primes p that exactly divide N . We give a table of orders of component groups for all f of level N ≤ 127 and five examples in which the component group is very large, as predicted by the Birch and Swinn...

BACKGROUND Subcutaneous immunotherapy has been the principal approach of immunotherapy in the treatment of allergic diseases. Several clinical studies with birch, alder or hazel pollen extract conducted as subcutaneous immunotherapy have been published suggesting a well-tolerated and clinically effective treatment. Only a few clinical studies of sublingual immunotherapy (SLIT) with these allerg...