e-Pontos: Uma solução embarcada de automação comercial aplicada a clubes de fidelidade baseado em tecnologia RFID e esmart card

In practically all vertical markets and in every region of the planet, loyalty marketers have adopted the tactic of recognition and reward to identify, maintain and increase the yield of their customers. Several strategies have been adopted by companies, and the most popular among them is the loyalty program, which displays a loyalty club to manage these rewards. But the problem with loyalty programs is that customer identification and transfer of loyalty points are made in a semiautomatic. Aiming at this, this paper presents a master's embedded business automation solution called e-Points. The goal of e-Points is munir clubs allegiances with fully automated tooling technology to identify customers directly at the point of sales, ensuring greater control over the loyalty of associate members. For this, we developed a hardware platform with embedded system and RFID technology to be used in PCs tenant, a smart card to accumulate points with every purchase and a web server, which will provide services of interest to retailers and customers membership to the club

Enhancing security of linux-based android devices

Our daily lives become more and more dependent upon smartphones due to their increased capabilities. Smartphones are used in various ways from payment systems to assisting the lives of elderly or disabled people. Security threats for these devices become increasingly dangerous since there is still a lack of proper security tools for protection. Android emerges as an open smartphone platform which allows modification even on operating system level. Therefore, third-party developers have the opportunity to develop kernel-based low-level security tools which is not normal for smartphone platforms. Android quickly gained its popularity among smartphone developers and even beyond since it bases on Java on top of "open" Linux in comparison to former proprietary platforms which have very restrictive SDKs and corresponding APIs. Symbian OS for example, holding the greatest market share among all smartphone OSs, was closing critical APIs to common developers and introduced application certification. This was done since this OS was the main target for smartphone malwares in the past. In fact, more than 290 malwares designed for Symbian OS appeared from July 2004 to July 2008. Android, in turn, promises to be completely open source. Together with the Linux-based smartphone OS OpenMoko, open smartphone platforms may attract malware writers for creating malicious applications endangering the critical smartphone applications and owners� privacy. In this work, we present our current results in analyzing the security of Android smartphones with a focus on its Linux side. Our results are not limited to Android, they are also applicable to Linux-based smartphones such as OpenMoko Neo FreeRunner. Our contribution in this work is three-fold. First, we analyze android framework and the Linux-kernel to check security functionalities. We survey wellaccepted security mechanisms and tools which can increase device security. We provide descriptions on how to adopt these security tools on Android kernel, and provide their overhead analysis in terms of resource usage. As open smartphones are released and may increase their market share similar to Symbian, they may attract attention of malware writers. Therefore, our second contribution focuses on malware detection techniques at the kernel level. We test applicability of existing signature and intrusion detection methods in Android environment. We focus on monitoring events on the kernel; that is, identifying critical kernel, log file, file system and network activity events, and devising efficient mechanisms to monitor them in a resource limited environment. Our third contribution involves initial results of our malware detection mechanism basing on static function call analysis. We identified approximately 105 Executable and Linking Format (ELF) executables installed to the Linux side of Android. We perform a statistical analysis on the function calls used by these applications. The results of the analysis can be compared to newly installed applications for detecting significant differences. Additionally, certain function calls indicate malicious activity. Therefore, we present a simple decision tree for deciding the suspiciousness of the corresponding application. Our results present a first step towards detecting malicious applications on Android-based devices.

Developing and benchmarking native Linux applications on Android

Smartphones get increasingly popular where more and more smartphone platforms emerge. Special attention was gained by the open source platform Android which was presented by the Open Handset Alliance (OHA) hosting members like Google, Motorola, and HTC. Android uses a Linux kernel and a stripped-down userland with a custom Java VM set on top. The resulting system joins the advantages of both environments, while third-parties are intended to develop only Java applications at the moment. In this work, we present the benefit of using native applications in Android. Android includes a fully functional Linux, and using it for heavy computational tasks when developing applications can bring in substantional performance increase. We present how to develop native applications and software components, as well as how to let Linux applications and components communicate with Java programs. Additionally, we present performance measurements of native and Java applications executing identical tasks. The results show that native C applications can be up to 30 times as fast as an identical algorithm running in Dalvik VM. Java applications can become a speed-up of up to 10 times if utilizing JNI.

An Implementation of Partitioned Scheduling Scheme for Hard Real-Time Tasks in Multicore Linux with Fair Share for Linux Tasks

The correctness of a hard real-time system depends its ability to meet all its deadlines. Existing real-time systems use either a pure real-time scheduler or a real-time scheduler embedded as a real-time scheduling class in the scheduler of an operating system (OS). Existing implementations of schedulers in multicore systems that support real-time and non-real-time tasks, permit the execution of non-real-time tasks in all the cores with priorities lower than those of real-time tasks, but interrupts and softirqs associated with these non-real-time tasks can execute in any core with priorities higher than those of real-time tasks. As a result, the execution overhead of real-time tasks is quite large in these systems, which, in turn, affects their runtime. In order that the hard real-time tasks can be executed in such systems with minimal interference from other Linux tasks, we propose, in this paper, an integrated scheduler architecture, called SchedISA, which aims to considerably reduce the execution overhead of real-time tasks in these systems. In order to test the efficacy of the proposed scheduler, we implemented partitioned earliest deadline first (P-EDF) scheduling algorithm in SchedISA on Linux kernel, version 3.8, and conducted experiments on Intel core i7 processor with eight logical cores. We compared the execution overhead of real-time tasks in the above implementation of SchedISA with that in SCHED_DEADLINE's P-EDF implementation, which concurrently executes real-time and non-real-time tasks in Linux OS in all the cores. The experimental results show that the execution overhead of real-time tasks in the above implementation of SchedISA is considerably less than that in SCHED_DEADLINE. We believe that, with further refinement of SchedISA, the execution overhead of real-time tasks in SchedISA can be reduced to a predictable maximum, making it suitable for scheduling hard real-time tasks without affecting the CPU share of Linux tasks.

Lego EV3 eta Linux-en arteko konektibitatea

Lego Mindstorms eta EV3ren arteko konektibitatea ahalbidetzeko driverraren garapena.

基于Linux的USB驱动程序实现

由于Linux良好的开放性和USB总线极佳的通用性 ,USB设备在Linux操作系统中得到了广泛的应用。文中首先介绍Linux驱动程序的架构 ,然后介绍USB设备 ,重点说明USB驱动程序的实现

基于嵌入式Linux的网络电视终端的实时性开发及HTML控制方法

Linux诸多优点，和国际自由软件组织的努力，使基于Linux的开发的嵌入式产品越来越多。由于Web技术的普及，怎样在嵌入式产品上实现性能优异的Web功能成为了当前的一个研究热点。该文深入探讨在进行嵌入式应用开发过程中遇到的问题并给出了相应的解决方法。并以网络电视终端为例，详细论述具体嵌入式产品中各部分的设计和实现。重点论述基于嵌入式Linux的网络电视终端的实时性开发及HTML控制方法。

Linux内核的实时支持的研究与实现

目前嵌入式计算的发展对实时多任务操作系统（RTOS）的需求日益迫切，而Linux内核的实时支持研究为迎合这种需求提供了新的可能性，通过从中断控制、实时调度策略、内核抢占机制及细粒度定时器几方面深入研究与实现了Linux内核的实时支持，以使之成为一个较为完善的RTOS。通过把实时部分设计为可配置的单元，以保留Linux原有系统支持及API。另外，为扩展系统适用范围，提出了可支持多实时调度策略的二阶段调度方案，同时指出了当前方案的不足和今后的研究方向。

基于Linux的网络计算机服务器的设计与实现

由于Linux在电子政务,企业,教育等等方面的推广应用,为网络计算机(NC)提供Linux上的各种应用服务的需求日益迫切,在Linux上实现网络计算机服务器(NCS)可以满足这种需求。文章通过从用户会话管理,Linux应用服务的输入输出传输,图像像素的压缩编码方式,及对不同NC运行环境的自适应性及系统安全配置几个关键方面深入研究与实现了Linux上的网络计算机服务器,使网络服务器能够为NC提供可用的应用服务。NCS为X客户程序的X服务器,目前已有的Linux应用可以不需修改为NC提供服务。另外,为提高系统的适应范围,提出了在会话服务中加入针对NC运行环境和网络属性的反馈式(Feedback)适应策略。文章最后指出了当前方案的不足和今后的研究方向。

虚拟硬件方法实现基于Intel StrongARM SA-1110平台的Linux APM

文章讨论了在StrongARM SA－1110开发板上实现Linux APM的主要技术问题。在分析了Intel StrongARM最新处理器SA－1110及开发板（Assabet）与电源管理相关的结构和特性的基础上，提出了一种基于虚拟硬件的系统跨平台移植的方法和思路，并以实际开发过程中的经验为背景，介绍了在Linux APM基于SA－1110平台的移植工作中虚拟硬件方法的应用和虚拟硬件方法在操作系统跨平台移植开发上的优点。

Linux可信路径安全机制研究及改进

在分析Linux操作系统现有的可信路径机制的基础上，采用阻止不可信进程对虚拟终端访问并且根据不同情况挂起、杀掉小部分进程的方法，提出了一种利用安全注意键实现的可信路径改进方案，提高了Linux可信路径机制的友好性、可扩充性，并且对用户登录的整个过程进行了保护。