构建鄱阳湖生态经济区低碳农业发展的路径思考

在全球气候变暖的条件下,发展低碳农业已成为不可逆转的趋势。鄱阳湖生态经济区内农业碳资源比较丰富,且极具开发潜力,因此,低碳农业发展空间巨大。鄱阳湖生态经济区内各地政府要立足当地资源优势,充分挖掘当地农业碳资源,通过发展有机农业和循环农业,加大植树造林力度,加强湿地保护,促使农业由高碳向低碳有效转变。     

浅谈“电力猫”宽带接入技术的应用

"电力猫"是一项基于电力线传输信号的设备,它在电力线上网技术中的应用十分广泛,是继有线通信、无线通信、卫星通信之后的又一通信网,电力猫通信已经成为多年来国内外科技人员技术攻关的新目标。对于家庭或小办公室用户而言,电力猫产品提供了最便捷、最安全的方式,它极大方便了人们的使用,有效延伸区域网路的涵盖范围。     

基于ZigBee的煤矿人员管理系统解决方案

本文介绍了ZigBee技术(无线传感器网络技术)的特点和优势,以及与其他几种无线通信技术的区别。详细叙述了KJ296煤矿人员管理系统的特点,以及ZigBee技术在此系统中的应用。     

EWB软件在《高频电子技术》实验中的应用

本文介绍了EWB仿真软件的特点及其在《高频电子技术》课程教学中的具体应用,将传统的实验方法与EWB的相结合,还可以使学生对新知识产生浓厚的探索兴趣,能有效地提高实验教学质量。     

An emerging paradigm or just another trajectory? Understanding the nature of technological changes using engineering heuristics in the telecommunications switching industry

The theoretical literature on technological changes distinguishes between paradigmatic changes and changes in trajectories. Recently several scholars have performed empirical studies on the way technological trajectories evolve in specific industries, often by predominantly looking at the artifacts. Much less - if any - empirical work has been done on paradigmatic changes, even though these have a much more profound impact on today's industry. It follows from the theory that such studies would need to focus more on the knowledge level than on the artifact level, raising questions on how to operationalize such phenomena. This study aims to fill this gap by applying network-based methodologies to knowledge networks, represented here by patents and patent citations. The rich technological history of telecommunications switches shows how engineers in the post-war period were confronted with huge challenges to meet drastically changing demands. This historical background is a starting point for an in-depth analysis of patents, in search of information about technological direction, technical bottlenecks, and engineering heuristics. We aim to identify when such changes took place over the seven different generations of technological advances this industry has seen. In this way we can easily recognize genuine paradigmatic changes compared to more regular changes in trajectory.     

An empirical investigation of factors influencing the adoption of data mining tools

Previous studies explored the adoption of various information technologies. However, there is little empirical research on factors influencing the adoption of data mining tools (DMTs), particularly at an individual level. This study investigates how users perceive and adopt DMTs to broaden practical knowledge for the business intelligence community. First, this study develops a theoretical model based on the Technology Acceptance Model 3, and then examines its perceived usefulness, perceived ease of use, and its ability to explain users’ intentions to use DMTs. The model's determinants include 4 categories: the task-oriented dimension (job relevance, output quality, result demonstrability, response time, and format), control beliefs (computer self-efficacy and perceptions of external control), emotion (computer anxiety), and intrinsic motivation (computer playfulness). This study also surveys the moderating effect of experience and output quality on the determinants of DMT adoption and use. An empirical study involving 206 DMT users was conducted to evaluate the model using structural equation modeling. Results demonstrate that the proposed model explains 58% of the variance. The findings of this study have interesting implications with respect to DMT adoption, both for researchers and practitioners.     

An institutional theory investigation of U.S. technology development trends since the mid-19th century

Drawing on institutional theory, we examine how institutions have influenced technology development trends in the U.S. since the mid-19th century. Based on an inductive analysis of the history of technology development and corporate R&D, we show that both formal and informal institutional rules and constraints played a role in the initial rise of markets for technology, their decline during the early-20th century, and their eventual return at the end of the 20th century. We also find that formal and informal institutions influenced the widespread adoption of in-house R&D labs during the mid-20th century. Our study integrates insights from both the economics and sociology branches of institutional theory. This perspective is particularly useful to analyze historical phenomenon and shifts in trends across long time periods.     

Investigating effectiveness and user acceptance of semantic social tagging for knowledge sharing

Social tagging systems enable users to assign arbitrary tags to various digital resources. However, they face vague-meaning problems when users retrieve or present resources with the keyword-based tags. In order to solve these problems, this study takes advantage of Semantic Web technology and the topological characteristics of knowledge maps to develop a system that comprises a semantic tagging mechanism and triple-pattern and visual searching mechanisms. A field experiment was conducted to evaluate the effectiveness and user acceptance of these mechanisms in a knowledge sharing context. The results show that the semantic social tagging system is more effective than a keyword-based system. The visualized knowledge map helps users capture an overview of the knowledge domain, reduce cognitive effort for the search, and obtain more enjoyment. Traditional keyword tagging with a keyword search still has the advantage of ease of use and the users had higher intention to use it. This study also proposes directions for future development of semantic social tagging systems.     

New Products of the 1980s and 1990s: The Diffusion of Household Technology in the Decade 1985-1995

The management of our households and the way we spend our leisure time has been greatly influenced by the introduction of various household technologies in the 1980s and 1990s. This paper compares the extent and rate of adoption of selected household products in Australian households. The diffusion of colour television sets, video cassette recorders, compact disc players, microwave ovens and personal computers into various types of households during the 1980s and 1990s was examined. This study found that different types of Australian households adopted new technology at different rates. The levels of ownership of various household technologies were highest for households with children. In general, one-adult households were slower to adopt new household technology when compared to other types of households. This paper speculates as to why one-person households are slower to purchase the latest in cooking and entertainment technology.     

从技术与社会的关系看技术的文化本质——以中国古代青铜技术为例

技术史研究的首要问题是对技术本质的探讨。目前对技术本质的理解大多偏向技术对自然改造的物质力量,而忽视了技术对维系社会价值体系和社会秩序的文化力量。中国古代青铜技术不仅在促进生产力发展方面有着重要作用,而且在对社会结构的建立和社会价值的规范中也显示出了重要的文化本质。