我々は,ネットワークオーバレイのアルゴリズム研究基盤として,オーバレイ構築ツールキット Overlay Weaver を開発・配布している.これを用いることで,計算機 1 台上で繰り返し動作試験を 行いながら,少ないコード量で structured オーバレイのアルゴリズムを実装できる.また,アルゴ リズムの差し替え,および,計算機 1台上での数千ノード規模のエミュレーションが可能であるため, アルゴリズム間の公正な比較を行うことができる.同時に,こうして実装したアルゴリズムはそのま ま実ネットワーク上で動作するため,アルゴリズム研究の成果が直接アプリケーションに結び付く. 本ツールキットでは,アルゴリズムの実装を容易なものとするために,各アルゴリズムに共通する ルーティング処理をアルゴリズム実装から分離した.本論文では,この分離を可能とする両者間のイ ンタフェースを提案する.この分...

Dynamic AOP (Aspect-Oriented Programming) is receiving growing interests in both the academia and the industry. Since it allows weaving aspects with a program at runtime, it is useful for rapid prototyping and adaptive software. However, the previous implementations of dynamic AOP systems suffered from serious performance penalties. This paper presents our new efficient dynamic AOP system in Ja...

Many birds can defend body temperature (Tb) far below air temperature (Ta) during acute heat exposure, but relatively little is known about how avian heat tolerance and evaporative cooling capacity varies with body mass (Mb), phylogeny or ecological factors. We determined maximum rates of evaporative heat dissipation and thermal end points (Tb and Ta associated with thermoregulatory failure) in...

The weaver (wv) mutation affects the pore-forming region of the inwardly rectifying potassium channel (GIRK) leading to degeneration of cerebellar granule and midbrain dopaminergic neurons. The mutated channel (wvGIRK) loses its potassium selectivity, allowing sodium (Na+) and possibly calcium ions (Ca2+) to enter the cell. Here we performed whole cell patch-clamp recordings combined with micro...

Normal mice (+/+) and homozygous weaver mutant mice (wv/wv) at 1 year of age were used for three-dimensional computer-aided reconstructions of the nucleus accumbens (NA) and neostriatum (ST) and for quantitative estimations of the total number of medium-sized neurons in the NA and ST, and for the total number of tyrosine hydroxylase (TH)-containing neurons in the ventral tegmental area (VTA) an...

Vulnerability of midbrain dopaminergic (DA) neurons in the weaver mouse was studied at postnatal (P) days 8 and 90, in chosen coronal levels throughout the anteroposterior (AP) extent of the substantia nigra pars compacta (SNc). Wild-type (+/+) and homozygous weaver (wv/wv) mice used were the offspring of pregnant dams injected in several cases with tritiated thymidine on embryonic days 11-15. ...