本稿では過負荷時にWeb アプリケーションサーバの性能低下を防ぐ Session-aware Queue Scheduling(SQS)を 提案する.既存の多くのアドミッション制御はサーバ全体またはページを単位として制御を行うため,セッション を利用する現実のワークロードには適していない.実際のワークロードを重視したスケジューリングを行うために, SQS ではページ単位のスケジューラとセッション単位のスケジューラを連携させる.ページスケジューラはWeb アプリケーションの進捗を監視することで,最適なページ処理並行度を動的に決定する.セッションスケジューラ はページスケジューラの待機リクエストのためのキューを監視することで最適な同時セッション数を動的に決定す る.我々はこれらのスケジューラを Tomcat 上に実装し,セッションを考慮したワークロードを用いて実験を行っ た.その結果,S...

It is hypothesized that interplay of earthquake, soil, foundation and structure (SFS) dynamic characteristic, and their interaction in time domain, control the behavior of SFS system during earthquakes. Moreover, (passive and active) control of spatial and temporal location of seismic energy dissipation (preferably in soil) can improve safety and economy of SFS systems. Such energy dissipation ...

Arai has developed several physical models of the human vocal tract for education and has reported that they are intuitive and helpful for students of acoustics and speech science. We first reviewed dynamic models, including the sliding three-tube (S3T) model and the flexible-tongue model. We then developed a head-shaped model with a sliding tongue, which has the advantages of both the S3T and ...

We determined the inner products of two conformal vectors with central charge 1 2 whose τ -involutions generates S3 if none of τ -involutions are trivial. We also see that a subVA generated by such conformal vectors is a VOA with central charge 1 2 + 20 21 or 4 5 + 6 7 and has a Griess algebra of dimension three or four, respectively.

Writing functions in R is an important skill for anyone using R. S3 methods allow for functions to be generalised across different classes and are easy to implement. Whilst many R users are be adept at creating their own functions, it seems that there is room for many more to take advantage of R's S3 methods. This paper provides a simple and targeted guide to explain what S3 methods are, why pe...

We present a simple algorithm for estimating the cardinality of a set I, based on a RandomSample(I) primitive that returns an element of I uniformly at random. Our algorithm with probability (1−perr) returns an estimate of |I| accurate within a factor (1 ± δerr) invoking RandomSample(I) at most O (

Large numbers of people all over the world read and contribute to various review sites. Many contributors are understandably concerned about privacy in general and, specifically, about linkability of their reviews (and accounts) across multiple review sites. In this paper, we study linkability of community-based reviewing and try to answer the question: to what extent are ”anonymous” reviews li...

This paper will attempt to identify some of the major methodological hurdles that are present when treating or researching seizure conditions using neurobehavioural approaches. An overview of the unique methodological problems that arise with behavioural/psychological treatments will be discussed. The author will focus on personal experiences with complex and simple partial seizures, looking in...

This document describes an architecture for describing Simple Network Management Protocol (SNMP) Management Frameworks. The architecture is designed to be modular to allow the evolution of the SNMP protocol standards over time. The major portions of the architecture are an SNMP engine containing a Message Processing Subsystem, a Security Subsystem and an Access Control Subsystem, and possibly m...

An α-degree is hyperimmune-free if it does not contain a hyperimmune set. We study the existence problem of a hyperimmunefree α-degree for an admissible ordinal α, and show that the underlying structure of an admissible ordinal determines the existence and cardinality of the collection of hyperimmune-free α-degrees. The combinatorial principle 3 is demonstrated to play a key role in answering t...