《多晶硅生产技术》课程项目化教学改革实践

随着信息化、数字化技术的发展,学生获取知识的渠道增多,传统的教学方法已不适应现代社会的发展,进行课程教学改革势在必行。从多晶硅生产技术项目化课程设计、实践教学、课程考核、教学形式和方法入手,提出解决这些问题的具体意见和建议。自《多晶硅生产技术》实施课程项目化教学改革以来,学生综合素养、自主学习能力普遍比未实施课改的学生强。     

致密油压裂现状及发展建议

致密油作为一种非常规石油资源,目前在美国和加拿大开发地较为成功。近年来,随着页岩气水平井钻井技术和水力压裂技术的快速发展,其开发技术也为致密油的开采打下了良好基础。我国致密油开发相对较晚,目前还处于起步阶段。因此,加快我国致密油勘探开发技术的发展,对我国致密油的成功开发具有重大意义。概述了国内外致密油开发现状,分析了致密油的储层特征,重点介绍了目前国内致密油压裂技术的进展并结合目前现状对我国致密油压裂技术的发展提出了一些建议。     

钛合金内螺纹的电火花加工工艺研究

钛合金材料具有硬度高、强度大、导热系数小、弹性模量低的特点,采用机用丝锥进行钛合金内螺纹加工,经常导致丝锥损坏、螺纹成品率低,对应优化措施需要综合考虑因素多,不易掌握。尤其是小尺寸螺纹加工,难度更大。而电火花加工内螺纹技术成熟。通过M2规格钛合金内螺纹的电火花加工实例,确定了电极尺寸、放电参数和精度保证方式等工艺控制要点以及小尺寸钛合金螺纹电火花加工的工艺路径。试验表明:采用电火花加工钛合金内螺纹具有高效率、成本低、质量可靠的特点。     

轮胎技术领域中国发明专利分析

通过对中国发明专利进行数据检索,分析中国轮胎技术领域的专利逐年申请趋势、申请人地域和属性构成,结果表明中国轮胎产业处于快速发展期,企业是轮胎技术领域的创新主体。结合重点轮胎制造企业的专利申请量、专利授权率、专利维持时间、发明人数量、技术分布等因素,分析重点企业的专利竞争情况。     

The relationship between cell phone use,academic performance,anxiety, and Satisfaction with Life in college students

While functional differences between today’s cell phones and traditional computers are becoming less clear, one difference remains plain – cell phones are almost always on-hand and allow users to connect with an array of services and networks at almost any time and any place. The Pew Center’s Internet and American Life Project suggests that college students are the most rapid adopters of cell phone technology and research is emerging which suggests high frequency cell phone use may be influencing their health and behavior. Thus, we investigated the relationships between total cell phone use (N = 496) and texting (N = 490) on Satisfaction with Life (SWL) in a large sample of college students. It was hypothesized that the relationship would be mediated by Academic Performance (GPA) and anxiety. Two separate path models indicated that the cell phone use and texting models had good overall fit. Cell phone use/texting was negatively related to GPA and positively related to anxiety; in turn, GPA was positively related to SWL while anxiety was negatively related to SWL. These findings add to the debate about student cell phone use, and how increased use may negatively impact academic performance, mental health, and subjective well-being or happiness.     

Factors influencing digital technology use in early childhood education

The current study uses path modeling to investigate the relationship between extrinsic and intrinsic factors that influence early childhood educators' digital technology use. Survey data from 1234 early childhood educators indicate that attitudes toward the value of technology to aid children's learning have the strongest effect on technology use, followed by confidence and support in using technology. Additionally, student SES has the strongest effect on attitudes, while support and technology policy influence teacher confidence, which in turn influences attitudes. In contrast, more experienced teachers have more negative attitudes. Overall, the study provides the first path model investigating early childhood educators' technology use and provides practical considerations to aid teachers' use of technology in the classroom.     

Household Adoption of Technology: The Case of High-Speed Broadband Adoption in Australia

Within the home context a high-speed broadband Internet connection is seen as a key enabler for effective access to and use of the Internet. This article examines the factors contributing to household adoption of high speed broadband in Australia. Building on the Theory of Reasoned Action and seminal research on technology adoption in the home and the workplace, the article presents and evaluates a hypothesized model of Household Adoption of Technology.     

Aligning RFID applications with supply chain strategies

Many large retailers decided to adopt RFID as their new supply chain technology, but RFID adoption by all industries did not spread as rapidly as initially expected. We believe that its benefits constituted the major barrier to its adoption, and argued that a major contributor to the delay has been its inappropriate implementation. Our study reports the result of six in-depth case studies, which, together with case content analysis of 88 reported RFID applications, provided us with a clear view of the RFID implementation landscape, suggesting that organizations often mindlessly adopted RFID applications that were misaligned with their supply chain strategies, leading to unsatisfactory benefits. Insights into how organizations should adopt RFID were developed from our results and were discussed.     

Intrusion of software robots into journalism: The public's and journalists' perceptions of news written by algorithms and human journalists

This study adopted a two (author: algorithm or journalist) by two (notification of author: real or inverse) between subject design to investigate how the public and journalists perceive the quality of algorithms-written articles compared with human journalist's work. Findings showed that both the public and journalists' evaluations were varied by the manipulation of author notification. That is, the public gave higher scores to the algorithm's work when it was notified as the real author, but they gave lower scores to the algorithm's work when the author was notified as a journalist. It confirmed the public's negative attitude toward journalists' credibility and craving for new information and communication technology (ICT) products/services in Korea. Based on journalists' resistance to change and innovation and the theory of prejudice, it was expected that journalists would be favorable to another journalist's work and unfavorable to an algorithm's work. However, contrary to the hypothetical expectation, journalists also gave higher scores to an algorithm's work and lower scores to a journalist's work. Implications relating to the intrusion of algorithm-written articles into journalism were discussed.     

Temperature stable 0.35Ag2MoO4-0.65Ag0.5Bi0.5MoO4 microwave dielectric ceramics with ultra-low sintering temperatures

In this study, the novel temperature-stable (1-x)Ag₂MoO₄-xAg_0.5Bi_0.5MoO₄ microwave dielectric ceramics were prepared by a modified solid-state reaction method. The phase composition, microstructures and microwave dielectric properties of the (1-x)Ag₂MoO₄-xAg_0.5Bi_0.5MoO₄ ceramics were investigated. All the compounds can be sintered well at ultra-low temperatures (<540 °C). The XRD and SEM analysis indicate that the Ag₂MoO₄ and the Ag_0.5Bi_0.5MoO₄ can coexist with each other. When x = 0.65, the ceramics exhibit the best microwave dielectric properties with a relative permittivity of 23.9, a Q × f value of 16,200 GHz (at 7.3 GHz) and a near-zero TCF value of -2.4 ppm/°C at 520 °C. The results indicate that temperature-stable (1-x)Ag₂MoO₄-xAg_0.5Bi_0.5MoO₄ ceramics are promising candidates for low temperature co-fired ceramics (LTCC) applications.