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A characteristic feature of spider karyotypes is the predominance of unusual multiple X chromosomes. To elucidate the evolution of spider sex chromosomes, their meiotic behavior was analyzed in 2 major clades of opisthothele spiders, namely, the entelegyne araneomorphs and the mygalomorphs. Our data support the predominance of X(1)X(2)0 systems in(More)
In terms of cytogenetics, entelegyne araneomorphs are the best studied clade of spiders. The typical karyotype of entelegyne males consists of acrocentric chromosomes, including 2 non-homologous X chromosomes. The present study is focused on the karyotype, nucleolus organising regions (NORs) and sex chromosome behaviour during meiosis of the entelegyne(More)
The karyotypes of pseudoscorpions of the family Atemnidae (Arachnida: Pseudoscorpiones) were studied for the first time. Karyotype data for 7 species have been obtained. The diploid chromosome numbers of most species considerably exceed the numbers reported in pseudoscorpions so far, with males ranging between 65 and 143. In spite of this, the sex(More)
Service orientation is becoming the leading paradigm of contemporary software. The paradigm has been well known and successfully used in some domains like process control for decades. It is, however, a new paradigm in business scopes for many people and many software vendors. We discuss some implications of this fact. We study patterns in service-oriented(More)
The symbol λk (k ∈ {1, 2}) will denote the k-dimensional Hausdorff measure (with the usual normalization, so that λk([0, 1] ) = 1). For M ⊂ R we use the symbols ∂M , intM and clM to denote the boundary, the interior and the closure of M , respectively. For M 6= ∅ we denote by C(M) the Banach space of all bounded continuous functions on M with the supremum(More)
Service-oriented architecture (SOA) can use fine grained a well as coarse grained service interfaces. It appeared that coarse-grained interfaces are usually preferable. The fine-grained interfaces have some technical advantages - e.g. the applicability of object-oriented attitudes (compare SOAP-RPC protocol) but it often leads to SOA antipatterns like(More)
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