This thesis sprung up from the interest to immerse myself in the inner-workings of the wireless sensor networks (WSNs) that I was deploying as part of my Ph.D. dissertation in Civil Engineering.

关键词：频率信道；无线传感器网络（WSN）；信道跳频；时间同步

查看摘要 索取原文[83页]

Using current frameworks developers must meticulously track the proper sequence of touch events from multiple temporally overlapping touch streams using disparate event-handling callbacks. In addition, multiple gestures often begin with the same touch event sequence leading to gesture conflicts in which user input is ambiguous. Thus, developers must perform heavy runtime testing to detect and resolve conflicts. We simplify multitouch gesture creation and management with Proton, a framework that allows developers to declaratively specify a gesture as a regular expression of customizable touch event symbols. Proton provides automatic gesture matching and static analysis of gesture conflicts. We also introduce gesture tablature, a graphical notation that concisely describes the sequencing of interleaved touch events. Finally, we present a user study that indicates that users can read and interpret gesture tablature over four times faster than event-handling pseudocode. Multitouch applications require new design principles and tools for development. This dissertation addresses the challenges of designing gestures and interfaces that benefit from multitouch input and presents tools to help developers build and recognize multitouch gestures. This work serves to facilitate a wider adoption of multitouch interfaces. We conclude with several research directions for continuing the investigation of multitouch input.

关键词：触摸流；跟踪触摸；应用程序设计；多点触控

查看摘要 索取原文[136页]

Automated media classification techniques like speech processing and face recognition are becoming increasingly commonplace and sophisticated. While such tools can add great value to the public sphere, media searches often process sensitive information, leading to a potential breach of client privacy. Thus, there is great potential for applications involving privacy-preserving searches on public databases like Google Images, Flickr, or ``Wanted Persons" directories put forth by various police agencies. The objective of this thesis is to argue that private media searches masking the client's query from the server are both important and practically feasible. The main contributions include an audio search tool that uses private queries to identify a noisy sound clip from a database without giving the database information about the query. The proposed scheme is shown to have computation and communication costs that are sublinear in database size. An important message of this work is that good private search schemes will typically require special algorithms that are designed for the private domain. To that end, some techniques used in the private audio search tool are generalized to adapt nearest-neighbor searches to the private domain. The resulting private nearest-neighbor algorithm is demonstrated in the context of a privacy-preserving face recognition tool.

关键词：媒体分类技术；语音处理；人脸识别；自动化；搜索；敏感信息；隐私

查看摘要 索取原文[89页]

Traditional electrical wiring has become limited in terms of bandwidth capacity and power consumption. As digital circuit elements have reduced in size and increased in speed, electrical interconnects have been struggling to keep up with the bandwidth demands. The primary factors holding back copper wires are high capacitance and inherent dielectric losses. The industry has compensated by placing repeaters and amplifiers along electrical links. However, these methods increase circuit complexity and energy consumption.Phototransistors offer an alternative for low-power optical detection.Others have proposed optical field-effect transistors (FETs) including photo-heterojunction JFETs (photo-hetero-JFETs) [8] and CMOS devices [9]. We will focus on the photo-bipolar junction transistor (photo-BJT) and heterojunction phototransistor (HPT) because of the large current gain of such devices. In Figure 1, the photo-BJT system is compared to the PD receiver system in terms of power consumption and complexity.

关键词：锗化硅；二级晶体管；光学互连

查看摘要 索取原文[26页]

We explain in detail the design decisions and optimizations that were necessary to scale Active Testing to thousands of cores. We present extensions to UPC-Thrille that support hybrid memory models as well. We evaluate the effectiveness of Active Testing by running our tools on several Java and UPC benchmarks, showing that it can predict and confirm real concurrency bugs with low overhead. We demonstrate the scalability of Active Testing by running benchmarks with UPC-Thrille on large clusters with thousands of cores.

关键词：大型集群；主动测试；并行系统；内存；并发；分散

查看摘要 索取原文[114页]

The Software-Defined Networking (SDN) paradigm is typically applied to data center and enterprise networks. We argue that SDN is also promising for rural wireless networks, especially those in developing regions. Operating a rural network in the developing world means coping with unpredictability, low profit margins, and resource constraints; the increased flexibility and simplified management that software-defined networks provide are a major benefit in this context.

关键词：软件定义网络（SDN）；数据中心；企业网络；网络虚拟化；网络基础设施

查看摘要 索取原文[7页]

Communication-optimal algorithms are known for square matrix multiplication. Here, we obtain the first communication-optimal algorithm for all dimensions of rectangular matrices. Combining the dimension-splitting technique of Frigo, Leiserson, Prokop and Ramachandran (1999) with the recursive BFS/DFS approach of Ballard, Demmel, Holtz, Lipshitz and Schwartz (2012) allows for a communication-optimal as well as cache- and network-oblivious algorithm.

关键词：通信优化算法；分裂维技术；分布式内存；矩阵乘法；矩形矩阵算法

查看摘要 索取原文[12页]

This report focuses on the analysis of light emitting diode (LED) technology in the olid state lighting (SSL) market, that is, whether or not LED lighting products will eplace incandescent bulbs and compact fluorescent lamps (CFLs).

关键词：发光二极管（LED）技术；效率性能；固态照明（SSL）市场

查看摘要 索取原文[25页]

We present Three Fingered Jack, a highly productive approach to mapping vectorizable applications to the FPGA. Our system applies traditional dependence analysis and reordering transformations to a restricted set of Python loop nests. It does this to uncover parallelism and divide computation between multiple parallel processing elements (PEs) that are automatically generated through high-level synthesis of the optimized loop body.

关键词：重排序;Python循环巢;优化循环体

查看摘要 索取原文[7页]

This paper presents a novel approach to the management of the disease. Enabled by new technology, we constructed a glucometer that provides the ability to turn your mobile device into a blood sugar sensor, transforming blood glucose testing from struggle to sensation. We also built a web application dedicated to diabetic reviewed restaurants, presented here as a way to bring this technology to market.

关键词：糖尿病；血糖仪；血糖传感器；医疗器械

查看摘要 索取原文[17页]