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Integrated Wireless Authentication System: Sharing Satellite Communication among Multiple Organizations after Natural Disasters 集成无线认证系统:自然灾害后多个组织共享卫星通信
Pub Date : 2013-12-02 DOI: 10.1145/2536853.2536884
Toshikazu Nishimura, Hitoshi Ogawa
The catastrophic earthquake and Tsunami of Tohoku Japan in 2011, caused colossal damages to the ground infrastructures that resulted in the lost of means to acquire and to convey information between rescues and victims of disaster. This unfortunate situation of helplessness prompted us to propose in this paper a reliable means to recover a function of telecom infrastructure immediately by use of portable satellite phone with narrow band. The proposed system consists of sharing Internet access through satellite phone among multiple users and protocol conversion to improve the degraded performance caused by long-latency over satellite communication. The protocol conversion from application protocol like HTTP (Hypertext Transfer Protocol) over TCP (Transmission Control Protocol) to batch-oriented reliable protocol with forward error collection is presented. Through the implementation, we shows that the satellite communication is stabilized even in narrow band and it can be shared among many disaster victims.
2011年日本东北地区的灾难性地震和海啸对地面基础设施造成了巨大的破坏,导致救援人员和灾难受害者之间失去了获取和传递信息的手段。这种无奈的不幸情况促使我们在本文中提出了一种可靠的方法,利用窄带便携式卫星电话立即恢复电信基础设施的功能。该系统由多个用户通过卫星电话共享互联网接入和协议转换组成,以改善卫星通信长时延导致的性能下降。提出了从HTTP(超文本传输协议)等基于TCP(传输控制协议)的应用协议到具有前向错误收集功能的面向批处理的可靠协议的转换。通过实际应用表明,卫星通信在窄带条件下是稳定的,可以在多个受灾地区共享。
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引用次数: 1
Large-scale Structure-from-Motion Reconstruction with small memory consumption 具有小内存消耗的大规模运动结构重构
Pub Date : 2013-12-02 DOI: 10.1145/2536853.2536897
G. Lu, V. Ly, C. Kambhamettu
Structure-from-Motion reconstruction is to recover the 3 dimensional structure from 2 dimensional images. Recent research in this field demonstrates the ability to reconstruct cities based on images extracted from a photo collection website; SIFT feature is typically extracted to detect correspondences between images. For the reconstruction of large scale unsorted images, the system is required to store all features and points information in the memory to search for correspondences. As SIFT feature is a 128 dimensional real-valued vector, storing each descriptor would consume a significant amount of memory. Due to this limitation, we propose to project the high-dimensional feature into a lower-dimensional space by using a new learned projection matrix while still maintaining the property of the original features. Hence, the result of this projection will shorten the distance among descriptors of the same point while lengthening the distance among descriptors of different points. These projected descriptors use Hellinger distance for calculation of the similarity between features. Furthermore, we learn a mapping function, which will map the real-valued descriptor into binary code coping with the variation of correspondence searching method. Experiments demonstrate that our method achieve excellent results with limited memory requirement.
从运动中恢复结构是一种从二维图像中恢复三维结构的方法。该领域的最新研究表明,基于从图片集网站提取的图像重建城市的能力;通常提取SIFT特征来检测图像之间的对应关系。对于大规模未排序图像的重建,要求系统将所有的特征和点信息存储在存储器中,以查找对应关系。由于SIFT特征是一个128维实值向量,因此存储每个描述符将消耗大量内存。由于这一限制,我们提出使用新的学习投影矩阵将高维特征投影到低维空间,同时仍保持原始特征的性质。因此,这种投影的结果将缩短同一点的描述子之间的距离,而延长不同点的描述子之间的距离。这些投影描述符使用海灵格距离来计算特征之间的相似性。此外,我们还学习了一个映射函数,该函数可以将实值描述符映射为二进制代码,以应对对应搜索方法的变化。实验表明,该方法在有限的内存要求下取得了很好的效果。
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引用次数: 2
(Ab)using foreign VMs: Running Java Card Applets in non-Java Card Virtual Machines (b)使用国外虚拟机:在非Java卡虚拟机上运行Java卡小程序
Pub Date : 2013-12-02 DOI: 10.1145/2536853.2536870
Michael Roland, J. Langer, R. Mayrhofer
Creating Java Card applications for Near Field Communication's card emulation mode requires access to a secure smartcard chip (the secure element). Today, even for development purposes, it is difficult to get access to the secure element in most current smart phones. Therefore, it would be useful to have an environment that emulates a secure element for rapid prototyping and debugging. Our approach to such an environment is emulation of Java Card applets on top of non-Java Card virtual machines (e.g. Android's Dalvik VM). However, providing a Java Card run-time environment on top of another Java virtual machine faces one big problem: The Java Card virtual machine's operation principle is based on persistent memory technology. As a result, the VM and the applications that run on top of it have a significantly different life-cycle compared to other Java VMs. Based on specific scenarios for secure element emulators for the Android platform, we evaluate these differences and their impact on Java VM-based Java Card emulation. Further, we propose possible solutions to the problems that arise from these differences in the life-cycles.
为近场通信的卡仿真模式创建Java卡应用程序需要访问安全的智能卡芯片(安全元件)。今天,即使是出于开发目的,也很难访问大多数当前智能手机中的安全元素。因此,拥有一个模拟安全元素的环境对于快速原型和调试是很有用的。我们实现这种环境的方法是在非Java卡虚拟机上模拟Java卡小程序(例如Android的Dalvik VM)。然而,在另一个Java虚拟机之上提供Java Card运行时环境面临一个大问题:Java Card虚拟机的操作原理是基于持久内存技术的。因此,与其他Java虚拟机相比,虚拟机及其上运行的应用程序具有明显不同的生命周期。基于Android平台的安全元素仿真器的特定场景,我们评估了这些差异及其对基于Java vm的Java Card仿真的影响。此外,我们提出了可能的解决方案,由这些生命周期的差异产生的问题。
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引用次数: 2
DroidFuzzer: Fuzzing the Android Apps with Intent-Filter Tag DroidFuzzer:用Intent-Filter标签模糊Android应用
Pub Date : 2013-12-02 DOI: 10.1145/2536853.2536881
Hui Ye, Shaoyin Cheng, Lanbo Zhang, Fan Jiang
The Android system is getting more and more popular on the mobile devices. Thus, lots of apps have sprung up to facilitate people's daily life. However, many of the apps are released without sufficient testing work, so the users encounter a sudden app crash now and then. This will undoubtedly impact the user's experience and even lead to economic loss. Because current testing tools on Android apps mainly focus on the motion event on the screen, like click event, bugs concerned with data handling module in an app is neglected. In this paper, we propose an automated testing method to fuzz testing the Android apps. The test targets are the Activities which accept outside MIME data. These Activities are picked out by analyzing the Intent-filter tag in the AndroidManifest.xml file. An automated fuzzing tool, DroidFuzzer, is implemented based on the method. Finally, experiments are conducted to prove the effectiveness of it.
Android系统在移动设备上越来越受欢迎。因此,大量的应用程序如雨后春笋般涌现,以方便人们的日常生活。然而,许多应用在发布时并没有进行足够的测试,所以用户时不时会遇到应用突然崩溃的情况。这无疑会影响用户的体验,甚至导致经济损失。因为目前Android应用的测试工具主要关注屏幕上的运动事件,比如点击事件,所以忽略了应用中数据处理模块的bug。本文提出了一种自动化测试方法对Android应用程序进行模糊测试。测试目标是接受外部MIME数据的活动。这些活动是通过分析AndroidManifest.xml文件中的Intent-filter标签挑选出来的。基于该方法实现了自动化模糊测试工具DroidFuzzer。最后通过实验验证了该方法的有效性。
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引用次数: 114
Efficient Monitoring of Moving Mobile Device Range Queries using Dynamic Safe Regions 使用动态安全区域有效监控移动设备范围查询
Pub Date : 2013-12-02 DOI: 10.1145/2536853.2536899
Haidar Al-Khalidi, D. Taniar, John Betts, S. Alamri
As the number of mobile devices is experiencing an explosive growth, mobile query processing has become an important application of mobile devices. One of the most frequently used mobile queries is range queries - retrieving surrounding objects of interest. As mobile devices are moving, these range queries are literally moving range queries. The main problem of processing mobile moving range queries is how to know when the surrounding objects of interest are no longer relevant (and the previously distant objects of interest have become relevant) since the mobile device has already moved to a new location. Past researches have proposed the use of safe region - an area where the set of objects of interest to the mobile device does not change. However, when the query leaves the safe region, the mobile device has to reprocess the query. Knowing when and where the mobile device will leave a safe region is widely known as a difficult problem. To solve this problem, we propose two novel methods: (i) efficient construction of the safe region by using only two objects closest to the border of the moving mobile device, and (ii) periodic monitoring the position of the mobile device. Our evaluation shows that our method enlarges the safe region compared with previous methods, giving the mobile device a wider range to roam, and therefore, reducing computation and communication costs.
随着移动设备数量的爆炸式增长,移动查询处理已经成为移动设备的重要应用。最常用的移动查询之一是范围查询——检索周围感兴趣的对象。随着移动设备的移动,这些范围查询实际上是移动范围查询。处理移动移动范围查询的主要问题是,当移动设备已经移动到一个新位置时,如何知道周围感兴趣的对象何时不再相关(而以前遥远的感兴趣的对象何时变得相关)。过去的研究建议使用安全区域——移动设备感兴趣的对象集合不会改变的区域。但是,当查询离开安全区域时,移动设备必须重新处理查询。众所周知,知道移动设备何时何地离开安全区域是一个难题。为了解决这一问题,我们提出了两种新方法:(i)利用最靠近移动设备边界的两个物体高效构建安全区域;(ii)定期监测移动设备的位置。我们的评估表明,与以前的方法相比,我们的方法扩大了安全区域,使移动设备的漫游范围更广,从而减少了计算和通信成本。
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引用次数: 2
SRE: A Scenario-based Requirement Exploration Process for End-user Mobile-Application Development SRE:用于终端用户移动应用程序开发的基于场景的需求探索过程
Pub Date : 2013-12-02 DOI: 10.1145/2536853.2536900
N. Tran, Hong-Quang Nguyen
The world is going mobile. Explosive growth in popularity and functionality of mobile-computing allows more personal and professional tasks to be done on these portable devices, creating enormous opportunity for end-user development (EUD) -- a set of methods and techniques that allow application users to create and modify software products to support their works and hobbies. End-user developers face the same engineering challenges as professional developers, including (i) understanding their requirements, (ii) making design decisions, (iii) building application and (iv) debugging application; however, most of existing works on end-user development only focus on solving design and implementation problems. In this paper, we addressed the requirement problem of end-user developers by proposing a scenario-based iterative process for finding application requirements based on identifying different usage scenarios with the support of knowledge about background of the application topic. We evaluated our process with one comparative study and two case studies.
世界正在走向移动化。移动计算的普及和功能的爆炸式增长使得更多的个人和专业任务可以在这些便携式设备上完成,为终端用户开发(EUD)创造了巨大的机会——一套允许应用程序用户创建和修改软件产品以支持他们的工作和爱好的方法和技术。终端用户开发人员面临与专业开发人员相同的工程挑战,包括(i)理解他们的需求,(ii)做出设计决策,(iii)构建应用程序和(iv)调试应用程序;然而,大多数现有的终端用户开发工作只关注于解决设计和实现问题。在本文中,我们通过提出一个基于场景的迭代过程来解决最终用户开发人员的需求问题,该过程基于识别不同的使用场景,并在应用程序主题背景知识的支持下找到应用程序需求。我们用一个比较研究和两个案例研究来评估我们的过程。
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引用次数: 0
Primer Streamer: a System to Attract Users to Interests via Images on HMD Primer Streamer:一种在HMD上通过图像吸引用户兴趣的系统
Pub Date : 2013-12-02 DOI: 10.1145/2536853.2536940
N. Isoyama, T. Terada, M. Tsukamoto
Recently, environments in which users can always see information is becoming realistic due to the development of wearable computing. Researchers have proposed various information presentation methods for different situations. However, in wearable computing environments, since the user does not always need a particular piece of information, there should a specified duration for which the system can show information that does not have any specific importance for the user. In this research, we propose a system that prompts the user to become unconsciously attracted to certain information by presenting visual information related to their interest. Our system utilizes the concept of the priming effect, whereby individuals are affected by content that has been presented before. Evaluation results confirmed that presenting information prompts the user to obtain the intended information. We also implemented a prototype of the system, Primer Streamer, that presents information related to user interest.
最近,由于可穿戴计算的发展,用户可以随时看到信息的环境正在成为现实。研究人员针对不同的情况提出了不同的信息呈现方法。然而,在可穿戴计算环境中,由于用户并不总是需要特定的信息,因此应该有一个指定的持续时间,系统可以在此期间显示对用户没有任何特定重要性的信息。在这项研究中,我们提出了一个系统,通过呈现与用户兴趣相关的视觉信息,提示用户无意识地被某些信息所吸引。我们的系统利用了启动效应的概念,即个人会受到之前呈现的内容的影响。评估结果证实,呈现的信息提示用户获取预期的信息。我们还实现了一个系统的原型,Primer Streamer,它显示了与用户兴趣相关的信息。
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引用次数: 4
Improving reversible histogram based data hiding schemes with an image preprocessing method 用图像预处理方法改进基于可逆直方图的数据隐藏方案
Pub Date : 2013-12-02 DOI: 10.1145/2536853.2536876
Mehdi Fallahpour, D. Megías, M. Ghanbari
This paper presents two edge detectors and a preprocessing algorithm for histogram based data hiding schemes. The proposed technique takes advantage of the edge detectors to segment the image into plain and textured areas. The plain areas are selected for embedding where a histogram based scheme is used to embed information in these areas. Since in the plain areas, pixel intensities are close to each other, with the proposed preprocessing algorithm the number of shifted pixels for the same amount of hidden data capacity are decreased which results in a better transparency. To validate the efficiency of the technique two of the best known histogram based schemes which use prediction and interpolation are implemented and results are compared with and without the preprocessing scheme. The experimental results show that the histogram based methods with preprocessing algorithm, under the same capacity, have better transparency than the schemes without preprocessing. This scheme improves capacity, even by 200%, at equal distortion, or about 4 dB improvement in PSNR, at the same hiding capacity.
本文提出了基于直方图的数据隐藏方案的两种边缘检测器和一种预处理算法。该方法利用边缘检测器将图像分割成平面和纹理区域。选取平原区域进行嵌入,利用基于直方图的方案在这些区域嵌入信息。由于在平原地区,像素强度相互接近,采用本文提出的预处理算法可以减少相同隐藏数据容量的偏移像素数,从而获得更好的透明度。为了验证该技术的有效性,实现了两种最著名的基于直方图的预测和插值方案,并将结果与未进行预处理的方案进行了比较。实验结果表明,在相同容量下,经过预处理的基于直方图的方法比未经预处理的方法具有更好的透明性。在相同的隐藏容量下,该方案将容量提高了200%,或者将PSNR提高了约4db。
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引用次数: 0
A Mobile-based Multimedia System for Learning Japanese 基于手机的日语多媒体学习系统
Pub Date : 2013-12-02 DOI: 10.1145/2536853.2536917
Mohamed Hamada, T. Mitsui
In this research we develop a mobile-based learning system for Japanese language based on smart devices such as Apple iPhone and iPad. The research also utilizes machine learning techniques for facial recognition to understand the learners' conditions and respond with an appropriate learning recommendations that can fit with the learners' current condition.
在本研究中,我们开发了一个基于苹果iPhone和iPad等智能设备的移动日语学习系统。该研究还利用机器学习技术进行面部识别,以了解学习者的情况,并响应适合学习者当前情况的适当学习建议。
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引用次数: 7
Web-safe Fonts for Device-independent Mobile Web Applications 用于独立于设备的移动Web应用程序的Web安全字体
Pub Date : 2013-12-02 DOI: 10.1145/2536853.2536916
J. Chmielewski
The increasing diversity of mobile devices used to access web applications cause new problems to developers of device-independent mobile web applications. One of them is related to inconsistent fonts support. This paper provides font usage guidelines for the mobile Web. The guidelines are based on results of a font availability detection experiment we have carried out on a wide range of diverse mobile devices. The paper includes a detailed description of the experiment methodology and a summary of results.
用于访问web应用程序的移动设备的日益多样化给独立于设备的移动web应用程序的开发人员带来了新的问题。其中之一与不一致的字体支持有关。本文提供了移动Web的字体使用指南。这些指导方针是基于我们在各种不同的移动设备上进行的字体可用性检测实验的结果。本文包括实验方法的详细描述和结果总结。
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引用次数: 1
期刊
Advances in Mobile Multimedia
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