基于iOS平台的步长计算方案与实现

GPS一般不适用于室内环境定位,惯性导航是一种常用的室内定位技术。对此,提出了一种基于iOS平台的行走步长计算方法,通过iOS设备内置加速度计采集数据,计算腰部的竖直位移。行走时,人体的腰部轨迹相对于前进方向近似1个倒置单摆模型,依据此运动模型可以计算行走的步长。此外还给出了在iPhone上实现步长计算的软件实现方案,并设计了应用软件。实验表明,所提出的步长计算方案和软件可以实时显示行进的步长和总位移,测量结果较准确,误差约为5%,该方法可为开发室内定位系统提供一定理论依据。     

Mobile learning vs. traditional classroom lessons: a comparative study

Different methods can be used for learning, and they can be compared in several aspects, especially those related to learning outcomes. In this paper, we present a study in order to compare the learning effectiveness and satisfaction of children using an iPhone game for learning the water cycle vs. the traditional classroom lesson. The iPhone game includes multiple interaction forms and combined augmented reality (AR) mini‐games with non‐AR mini‐games. The traditional classroom lesson had the same learning content as the iPhone game. Thirty‐eight children participated in the study. The analyses showed that the children made significant learning gains about the water cycle, regardless of the method used. Even though the results showed that the iPhone method achieved higher knowledge results than the traditional classroom lesson, no statistically significant differences were found between the iPhone and the classroom lesson. When analysing the motivational outcomes, the results showed that the children found the iPhone game to be more satisfying than the classroom lessons. Since the iPhone game achieved similar learning results and a higher motivational effect than the classroom lesson, this suggests that games of this kind could be used as a tool in primary schools to reinforce students' lessons.     

Urban Interactive

Valentina Croci profiles the work of entertainment design office Area/Code which foregrounds urban locations in its games. As Croci explains the approach of this NewYork-based partnership, which delivers sat nav-inspired gaming to the mobile phone, demonstrates an inherent understanding of the importance of the physical in enhancing the imaginary. Copyright © 2010 John Wiley & Sons, Ltd.     

QR Panopticism: User Behavior Triangulation and Barcode-Scanning Applications

ABSTRACT

The increasingly ubiquitous two-dimensional barcodes designed by the Denso Wave company, known as the QR code, were originally intended to track millions of parts as they moved about on high-speed assembly lines. Since then, these increasingly ubiquitous black and white squares have been applied to an ever-broader range of nonindustrial uses. In order to make use of these codes, the vast majority of consumers use smart phone technologies in order to convert the codes into usable information. However, neither Apple’s iOS nor Google’s Android operating systems include a robust native capability to decode printed barcodes. As a result, users of these devices must download and install third-party applications that will do this work for them. Our research question is straightforward: are there privacy and security risks associated with this emerging QR app ecosystem? We installed and analyzed over twenty of the most popular QR code applications. Our findings suggest that a majority of the most popular QR code readers found in the Apple App and Google Play marketplaces are not passive systems, but instead capture and transmit additional data about the device back to the application developer. The paper then considers the privacy and security implications of the QR code app ecosystem.     

一种新型车载数字音频系统的软件设计

为了解决当前车载MP3功能单一、存储介质固定且存储容量小、不支持WMA音频文件播放、音源不足等问题。在完成硬件平台设计的基础上,提出了车载数字音频系统的软件设计方案,包括整个软件系统架构、工作流程及各主要功能子模块的实现过程。搭建的系统实现了播放USB/SD卡海量存储设备上的MP3/WMA音频文件,高灵敏度FM立体声收音机播放,iPod/iPhone音频播放控制,高低音音效控制,LCD液晶显示系统状态,更预留音频接口,可以方便连接CD、MP3、笔记本电脑、手机等外部音源。     

An empirical analysis of smartphone personalisation: measurement and user variability

The present report is an empirical analysis of smartphone personalisation. We collected data from two groups of users to measure how they adapt the content, interface and physical appearance of their devices. This user-driven personalisation is measured with a simple heuristic approach to quantify the behaviour. Using these scores, we explore how users differ from each other in how they personalise their smartphones with a focus on gender differences, usability and device usage in the wild. Among our findings are that not all users personalise their smartphones, females and males personalise their iPhones differently, and those who personalised their phones more tended to rate it as more usable. The users who personalised more also used their device for greater periods of time on a broader range of applications. For instance, individuals who adapted their iPhones to a greater degree also accessed the Web more often and spent more time browsing once it was accessed. We conclude with a discussion of possible factors underlying the large user diversity of smartphone personalisation found in this research.     

关于iPhone 4手机信号问题的探讨

iPhone 4为达到超薄机身和玻璃外壳的设计,将天线整合到不锈钢材质外围包边,用户只要同时握住他们就会出现信号衰减。在查阅了大量资料之后,导出iPhone 4的信号问题是由软件和硬件共同产生的。具体来有三个原因,现将详细分析三个原因,提出较为合理的改进方案,旨在阐述该产品的不足之处,解答消费者的疑惑,为iPhone 4保留市场占有率提供一点儿建议。     

iPastoral

Architectural theorist and educator Mark Morris parallels the 18th-century enthusiasm for the Claude glass, a black mirror that framed and filtered views into painterly landscapes, with the current infatuation for a similarly small shiny black device with a capacity for taking picturesque images.     

智能手机数据的提取与恢复

随着移动通信技术的发展,手机成为人们工作生活中必备的通讯工具,与此同时,手机犯罪也与日俱增,手机取证是打击这类犯罪的有效手段。以iPhone手机为例,介绍了数据恢复工具的安装,以及对智能手机的数据进行提取与恢复的方法。