AdaptWID: An Adaptive, Memory-Efficient Window Aggregation Implementation

Memory efficiency is important for processing high-volume data streams. Previous stream-aggregation methods can exhibit excessive memory overhead in the presence of skewed data distributions. Further, data skew is a common feature of massive data streams. The authors introduce the AdaptWID algorithm, which uses adaptive processing to cope with time-varying data skew. AdaptWID models the memory usage of alternative aggregation algorithms and selects between them at runtime on a group-by-group basis. The authors' experimental study using the NiagaraST stream system verifies that the adaptive algorithm improves memory usage while maintaining execution cost and latency comparable to existing implementations.     

嵌入式窗口系统的研究与实现

通过对多种嵌入式窗口系统的分析研究 ,提出了一个按模块分层的嵌入式窗口系统结构模型。该模型分为输入 /输出、窗口核心和应用接口三层 ,通过消息传递把各个组成模块有机地结合起来。其实现方法是以消息驱动为核心 ,采取窗口间的层叠顺序管理和相互剪切管理技术 ,合理地定义它们的数据结构和调用工具函数。利用该方法成功地实现了一个高效、简洁并便于移植和定制的嵌入式窗口系统。     

GKS-9x: Some Implementation Considerations

The Graphical Kernel System (GKS) was published as an ISO standard for computer graphics programming in August 1985. GKS is now undergoing revision in ISO/IEC and at the time of writing the text of the Draft International Standard of GKS-9x was being finalized. This paper presents a way in which a key part of the new functionality in GKS-9x, namely namesets and selection criteria, can be implemented effectively.     

一种通用遥感图像三维移动窗系统的设计

遥感卫星实时移动窗显示系统能够很直观地监视卫星数据接收质量,也能够及时发现感兴趣的信息点,因此成为地面系统的重要组成部分。本文利用JOGL技术、World Wind Java SDK技术和RCP技术实现一种通用三维移动窗显示系统,能够将卫星数据以及星下点轨迹进行实时3D滚动显示。此外,系统具有波段设置、全分辨率显示等功能,并可轻松实现跨平台移植。     

Implementation of Some Algorithms for Accelerating Computer Calculations

Methods for speeding up the execution of operations of division of polynomials are considered. Owing to the parallel determination of high-order and low-order digits of a quotient, processes of polynomial coding/decoding of digital data are accelerated by two to four times.     

教育评价系统几个关键问题的实现

计算机教育评价系统是基于Web设计的系统,以科学可行的评价指标为依托,根据教育教学评价和模糊数学的理论,利用计算机技术去统计、量化评价结果,借助因特网或局域网来实施评价活动.该系统采用JSP技术来设计开发,主要阐述该系统中几个关键问题的实现方法.     

Elements that Influence the Implementation of Crisis Preparedness Measures by Meeting Planners

The purpose of this study was to analyse the adoption of crisis preparedness measures by meeting planners. The study sought to determine how the adoption of crisis preparedness measures relates to meeting planner characteristics and identify the elements that influence their adoption (or lack of adoption) of these measures. A survey of professional meeting planners identified significant differences in the frequency of use of some key core crisis preparedness measures. Additionally, 10 categories of elements influencing the adoption of or failure to adopt crisis preparedness measures were identified. The findings of this study should be of interest to meeting organizers and professionals who want to make their meetings more crisis prepared rather than crisis prone.     

Twenty Years Beyond the Turing Test: Moving Beyond the Human Judges Too

Minds and Machines - In the last 20 years the Turing test has been left further behind by new developments in artificial intelligence. At the same time, however, these developments have revived...     

Guest Editorial: Window on the 80's

• In 1978 Radio Shack was the 44th largest computer company in the US.¹• One model of kitchen blender contains one thousand bytes of memory. • The week before Christmas, department stores sold more computers in toys than are presently found in data processing centers worldwide.     

工程制图技能训练方案探索与实施

注重职业能力培养,增加操作技能训练,是目前高职教育改革的一大特点。工程制图作为机电类专业的基础课,如何在缩减的学时中寻求高效的教与学是我们面临的问题。通过剖析相应岗位群需求,以工作过程为导向,明确了课程目标;架构了以“一个规范,二种技法,三大技能”为核心职业能力的课程训练框架;设计了以形体为主线,从基本训练到进阶训练的课程内容;提出了以具体任务为载体,固着教学,认知学徒式学习的技能训练实施方案。     

Beyond handover: supporting awareness for continuous coverage

Hospitals are required to operate as a continuous system because patient care cannot be temporarily suspended and handover is seen as a key method for enabling this. This paper reports a study of handover in a medical admissions unit. We draw on the notion of awareness as conceptualised within the Computer-Supported Cooperative Work literature to explore the role played by a variety of cognitive artifacts in supporting continuous coverage. While such awareness is typically characterised as being ‘effortless’, our study reveals that maintaining awareness in a context such as the medical admissions unit is effortful due to invisible work. We suggest that the notion of awareness is beneficial for exploring the practices of continuous coverage because it moves attention away from the moment of handover, instead encouraging consideration of the variety of practices through which clinicians display their work to, and monitor the work of, colleagues on different shifts. We argue that efforts to support continuous coverage should focus on improving awareness by increasing the visibility of information.     

VLIW微处理器模拟器仿真实现的几个关键问题

文章就一种VLIW体系微处理器模拟器仿真实现的几个关键问题(如模型建立、串并行的转换和数据相关等)进行了简要讨论,并提出了行之有效的解决方法.     

Beyond the Web: Mobile WAP-Based Management

Mobility, tightening competition and changes in system administrator behavior present new challenges in the management world. In particular, the need to constantly monitor services and rapidly identify and fix problems is becoming increasingly important. The Internet has made it possible to offer a comprehensive range of management services and applications accessible over the web. Nevertheless, in the near future a new and improved way to manage systems will be done by means of mobile phones. This paper shows how existing web-based solutions can be enhanced to support the new generation of media phones based on WAP (Wireless Application Protocol) technology. Although the specific focus of this work is on management solutions, the rsults are general and applicable to many other types of existing web-based applications. Some implementation details and experiences drawn from adding a WAP interface to an existing web-based management application are described.     

IS Innovation: Thinking Beyond the Silo

The IS discipline must shift its focus from current platforms, application areas, and comfort zones to societal engagement of technology.     

Beyond the cybernetic jam fantasy: the continuator

The Continuator is a usable musical instrument combining techniques from interactive and automatic learning systems. It learns and interactively plays with a user in the user's style. Music-generation systems have traditionally belonged to one of two categories: interactive systems in which players trigger musical phrases, events, or effects, such as the Karma musical workstation, and systems such as Risset's interactive piano, which allow for user input such as keystrokes or chords, but can't learn and use preprogrammed musical styles. Most of these systems propose musical effects libraries (a term used in the Karma workstation meaning a generation of music material based on user input). Although some of these effects are musically impressive, these systems can't be considered cybernetic musicians or even musical companions, because they use preprogrammed reactions and have no memory or facility for evolving.     

Beyond the black box: open implementation

Encapsulation, informally known as black-box abstraction, is a widely known and accepted principle. It is a basic tenet of software design, underlying approaches to portability and reuse. However, many practitioners find themselves violating it in order to achieve performance requirements in a practical manner. The gap between theory and practice must be filled. Open implementation is a controversial new approach that claims to do just that. The paper provides some ideas to spark further debate on black-box abstraction