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Proceedings 2007 IEEE SoutheastCon最新文献

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Micro process design and services virtualization 微流程设计和服务虚拟化
Pub Date : 2007-03-22 DOI: 10.1109/SECON.2007.342887
R. Wu
In this research paper we deal with the service virtualization concept based on the common component concept we implemented in previous research and on the component-based design foundation we build in the current research.
在本研究中,我们基于之前研究中实现的公共组件概念和当前研究中建立的基于组件的设计基础来处理服务虚拟化概念。
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引用次数: 0
Idea mechanics: Utilizing technology to better communicate ideas 理念机制:利用技术更好地交流理念
Pub Date : 2007-03-22 DOI: 10.1109/SECON.2007.342908
G. Laor
Ideas are the building blocks of every human endeavor, yet anyone who has ever tried to explain an idea he had conceived knows the difficulties involved in making his audience understand the idea. People will not understand the idea as is, but as it seems to them. They will associate other ideas or things which have nothing to do with the original intent of the idea's author. The method described in this paper attempts to create and use a new methodology to present any idea in such a way that it will be understood as is, eliminating as much as possible any other "interferences" in the transmission of the idea. This is done by breaking an idea into its elements, and placing them into the "idea diagram" schema, which is a diagram-based representation of the elements of an idea. This process of breaking the idea into its elements and placing them into the idea schema is extremely helpful for the author in order to verify that what he is trying to convey is actually expressed in his work, or in other words, that his idea is not lost to his audience by some wrong or unclear explanation. Ideas, once they are converted to objects that software can use, give many possibilities to software solutions. XML schemas that hold the idea, its elements, and related information or media, can be then transformed into various presentation platforms. One use of this method was on-line educational software that consisted in interactive tutorials on complex subjects. The development of "idea mechanics" is at its very beginning, and still requires a lot of practical implementation in order to judge its real value. Nonetheless, the educational applications that were developed using this methodology and the theoretical implementations both proved to be extremely promising.
想法是人类一切努力的基石,然而,任何试图解释自己构思的想法的人都知道,要让听众理解这个想法有多难。人们不会理解这个想法的本来面目,而会理解它在他们看来的样子。他们会将其他想法或事物联系在一起,而这些想法或事物与想法作者的初衷毫无关系。本文中描述的方法试图创造和使用一种新的方法来呈现任何想法,这样它将被理解为是,消除尽可能多的任何其他“干扰”在思想的传播。这是通过将一个想法分解成它的元素,并将它们放入“想法图”模式中来完成的,这是一个基于图表的想法元素的表示。这种将观点分解成元素并将其放入观点图式的过程对作者非常有帮助,因为作者可以验证他想要传达的内容是否在他的作品中得到了表达,或者换句话说,他的观点不会因为一些错误或不明确的解释而被读者所误解。想法一旦转化为软件可以使用的对象,就为软件解决方案提供了许多可能性。然后,可以将包含想法、元素和相关信息或媒体的XML模式转换为各种表示平台。这种方法的一个用途是在线教育软件,包括复杂科目的交互式教程。“理念机制”的发展才刚刚开始,还需要大量的实际执行才能判断其真正的价值。尽管如此,使用这种方法开发的教育应用程序和理论实现都被证明是非常有前途的。
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引用次数: 0
VXS switch card for high speed high density data acquisition system 用于高速高密度数据采集系统的VXS开关卡
Pub Date : 2007-03-22 DOI: 10.1109/SECON.2007.342922
H. Dong, C. Cuevas, D. Curry, E. Jastrzembski, F. Barbosa, J. Wilson, M. Taylor
Detectors for particle physics research incorporate thousands of electrical sensors that are sensitive to charged particles and generate signals with fast risetimes and at high rates. Data processing requires detecting the time when signals from charged particle sensors cross thresholds with picosecond accuracy. The high speed high density data acquisition system that processes the data from the detector sensors is built around the VITA-41 VME64 switched serial (VXS) standard. The VITA-41 standard defines payload and switch slot module functions, and VITA-41 card enclosures can support up to 18 payload modules and 2 switch modules. The payload card (FADC) collects and processes data from 16 charged particle sensors with 10 or 12 bits resolutions at 250 MSPS sample rate and sends the results to the switch module for further processing. The system design targets a VITA-41 backplane that contains 2 switch slots. One switch slot receives data serially at an aggregate rate of up to 6 gigabits per second from up to 18 payload cards. The second switch slot will be used to distribute timing and synchronization signals to the payload modules. This paper describes the design and implementation of the VXS switch card.
用于粒子物理研究的探测器包含数千个对带电粒子敏感的电子传感器,并以快速上升时间和高速率产生信号。数据处理需要以皮秒的精度检测来自带电粒子传感器的信号越过阈值的时间。处理探测器传感器数据的高速高密度数据采集系统是围绕VITA-41 VME64交换串行(VXS)标准构建的。VITA-41标准定义了有效载荷和交换槽模块功能,VITA-41卡框最多可支持18个有效载荷模块和2个交换模块。负载卡(FADC)以250 MSPS采样率从16个10位或12位分辨率的带电粒子传感器收集和处理数据,并将结果发送给交换模块进行进一步处理。系统设计的目标是包含2个交换槽的VITA-41背板。一个交换槽以高达每秒6千兆比特的总速率串行地从多达18个有效负载卡接收数据。第二个交换槽将用于向有效载荷模块分发定时和同步信号。本文介绍了VXS开关卡的设计与实现。
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引用次数: 0
Muscle fatigue analysis in young adults at different MVC levels using EMG metrics 使用肌电图分析不同MVC水平年轻人的肌肉疲劳
Pub Date : 2007-03-22 DOI: 10.1109/SECON.2007.342930
A. Zaman, T. Sharmin, Mohammad Ali Khan, M. Ferdjallah
Spectral parameters such as the mean and median frequencies have been documented to be reliable outcome variables for the assessment of muscle fatigue. The objective of this paper is to examine young subjects' surface electromyography (EMG) signals at different levels of maximum voluntary contractions (MVC) and to analyze spectral shifts in mean and median frequencies (MNF, MDF). In this study, continuous stream of EMG data sets from lower extremity muscles are used to characterize muscular fatigue from minimum to maximum MVC level. EMG data were recorded from the biceps brachii muscles during isometric contraction at constant torque levels using automated dynamometer. EMG metrics such as MNF, MDF, root mean square (RMS), and rectified root mean square (RRMS) were computed to assess muscle fatigue patterns.
频谱参数如平均频率和中位数频率已被证明是评估肌肉疲劳的可靠结果变量。本文的目的是检查年轻受试者在不同水平的最大自愿收缩(MVC)的表面肌电图(EMG)信号,并分析平均和中位数频率(MNF, MDF)的频谱移位。在这项研究中,来自下肢肌肉的肌电数据集的连续流被用来表征从最小到最大MVC水平的肌肉疲劳。在恒定扭矩水平下,使用自动测功机记录肱二头肌等距收缩时的肌电图数据。肌电指标如MNF、MDF、均方根(RMS)和校正均方根(RRMS)被计算来评估肌肉疲劳模式。
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引用次数: 14
Optical-output power degradation of AlGaN-based deep-UV light emitting diodes by plasma treatment 等离子体处理algan基深紫外发光二极管的光输出功率下降
Pub Date : 2007-03-22 DOI: 10.1109/SECON.2007.342970
M. Khizar, Y. M. Akhtar Raja
Optical power degradation in AlGaN-based deep-UV LEDs treated with low pressure O2-plasma treatment is reported. This process was performed prior to the metallization of p-type contacts, with and without transparent layer using disk-LEDs geometry. Following the rapid thermal annealing (RTA) of Ti/Al/Ti/Au, (n-contact) and Ni/Au, (p-contact), their current-voltage characteristics were analyzed. A significant increase in the p-contacts resistivity of the samples processed without a transparent layer was observed after treating with oxygen plasma for 15 s (at 0.25 mbar, and 30 W). This can be attributed to the generation of point-like defects and the donor-like nitrogen vacancies in the bare GaN-p-contact pads. A drastic change in the thermal stability of p-contact led to a significant loss in the optical output power in these devices. Furthermore, a noticeable decrease in the p-contact stability and their adhesion properties were also observed. This was mainly due to the Fermi level movement toward the conduction-band in p-GaN. Results on the comparative study of the L-I characteristics of the processed LED's, for their p-contacts treated with- and without-plasma are also discussed. Present study emphasizes the need to address the plasma damage related issues, as it can significantly degrade the optical output efficiencies of high-power flip chip AlGaN-based deep-UV emitters.
报道了采用低压o2等离子体处理的algan基深紫外led的光功率下降。该工艺是在p型触点金属化之前进行的,使用圆盘led几何形状,有或没有透明层。对Ti/Al/Ti/Au (n-触点)和Ni/Au (p-触点)进行快速热退火(RTA),分析了它们的电流-电压特性。在氧等离子体处理15 s (0.25 mbar, 30 W)后,观察到没有透明层的样品的p接触电阻率显着增加。这可以归因于在裸露的gan -p接触垫中产生点状缺陷和供体状氮空位。p-触点热稳定性的急剧变化导致这些器件的光输出功率的显著损失。此外,还观察到p-接触稳定性和粘附性能明显下降。这主要是由于p-GaN中的费米能级向导带移动。本文还讨论了经过等离子体处理和不经过等离子体处理的LED p触点的L-I特性的比较研究结果。由于等离子体损伤会显著降低高功率倒装芯片algan深紫外发射器的光输出效率,目前的研究强调需要解决与等离子体损伤相关的问题。
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引用次数: 8
Performance analysis of ad-hoc networks under black hole attacks 黑洞攻击下ad-hoc网络性能分析
Pub Date : 2007-03-22 DOI: 10.1109/SECON.2007.342872
Semih Dokurer, Y. M. Erten, Can Erkin Acar
A wireless ad-hoc network is a temporary network set up by wireless nodes usually moving randomly and communicating without a network infrastructure. Due to security vulnerabilities of the routing protocols, however, wireless ad-hoc networks may be unprotected against attacks by the malicious nodes. In this study the effects of black hole attacks on the network performance was investigated. Black hole attacks were simulated in Network Simulator 2 (ns-2) and measured the packet loss in the network with and without a black hole. A simple solution was also proposed against black hole attacks. This solution improved the network performance in the presence of a black hole by about 19%.
无线自组织网络是由无线节点建立的临时网络,通常是随机移动的,在没有网络基础设施的情况下进行通信。然而,由于路由协议存在安全漏洞,无线自组织网络可能无法抵御恶意节点的攻击。本文研究了黑洞攻击对网络性能的影响。在网络模拟器2 (ns-2)中模拟了黑洞攻击,并测量了有黑洞和没有黑洞的网络中的丢包量。针对黑洞攻击,还提出了一个简单的解决方案。该解决方案将存在黑洞的网络性能提高了约19%。
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引用次数: 134
AJAX application server performance AJAX应用服务器性能
Pub Date : 2007-03-22 DOI: 10.1109/SECON.2007.342873
C. Smullen, S. Smullen
An experimental study of the comparative performance of a real-life HTML application and an AJAX application that implement the same user interface was done. Data was collected on the performance of each when presented with the same tasks. Response size and service time performance measures were computed for the applications. AJAX provided significant performance improvements in response size (56%), thereby reducing bandwidth requirements. AJAX provided a mean service time improvement of approximately 16%.
对实现相同用户界面的实际HTML应用程序和AJAX应用程序的性能进行了实验研究。研究人员收集了每个人在面对相同任务时的表现数据。为应用程序计算响应大小和服务时间性能度量。AJAX在响应大小方面提供了显著的性能改进(56%),从而降低了带宽需求。AJAX提供了大约16%的平均服务时间改进。
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引用次数: 16
Comparison of approximate formulas for the capacitance of microstrip line 微带线电容近似公式的比较
Pub Date : 2007-03-22 DOI: 10.1109/SECON.2007.342939
M. Sadiku, S. Musa, S. Nelatury
In the development of CAD routines at rf or microwave frequencies, closed form models for the capacitance per unit length of microstrip interconnects are easily incorporated. Numerous formulas have been proposed based on analytical, numerical, and empirical approaches. When there are a host of formulas found in the literature, knowledge of their accuracy against measured values and a case study of comparison is all the more vital in the design practice. This paper considers 12 such closed form models published over the past four decades and makes a critical comparison and seeks a way of improving the accuracy. While new formulas are proposed that give rise to less % error compared to few others taken as reference, it is found that composite formulas inherit combined goodness from which they are derived. Our case study provides some interesting results.
在射频或微波频率的CAD程序开发中,微带互连单位长度电容的封闭形式模型很容易被纳入。基于分析、数值和经验方法提出了许多公式。当在文献中发现大量公式时,了解它们对测量值的准确性和比较案例研究在设计实践中更加重要。本文对近40年来发表的12个此类封闭形式模型进行了批判性比较,并寻求提高准确性的方法。虽然提出的新公式与少数其他公式相比误差较小,但发现复合公式继承了推导公式的组合优度。我们的案例研究提供了一些有趣的结果。
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引用次数: 10
An embedded linux based navigation system for an autonomous underwater vehicle 基于嵌入式linux的自主水下航行器导航系统
Pub Date : 2007-03-22 DOI: 10.1109/SECON.2007.342893
S. Thakur, J. Conrad
The purpose of a data acquisition system is to provide reliable and timely information. The received information can be then analyzed in real-time or remotely to assess the state of the measured environment. Similarly, for an autonomous underwater navigation system it is critical to analyze the data received from the inertial measurement unit and other acoustic sensors to calculate its position and direct the vehicle. This work is an effort toward the development of a data logging system based on an embedded Linux platform for an unmanned underwater vehicle. An embedded Linux based board has been chosen as the core data processing unit of the autonomous underwater vehicle (AUV). This work implements device drivers required for interfacing the inertial sensors and GPS unit to the core-processing unit. This system is intended to provide a development base for implementing various navigation algorithms, like Kalman Filter, to calculate the direction of the vehicle.
数据采集系统的目的是提供可靠和及时的信息。然后可以实时或远程分析接收到的信息,以评估被测量环境的状态。同样,对于自主水下导航系统来说,分析从惯性测量单元和其他声学传感器接收的数据以计算其位置并指导车辆是至关重要的。这项工作是为无人潜航器开发一个基于嵌入式Linux平台的数据记录系统。采用嵌入式Linux平台作为自主水下航行器(AUV)的核心数据处理单元。这项工作实现了将惯性传感器和GPS单元连接到核心处理单元所需的设备驱动程序。该系统旨在为实现各种导航算法(如卡尔曼滤波)提供一个开发基础,以计算车辆的方向。
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引用次数: 6
Wordlength estimation of digital controller synthesis for inkjet printer mechanism 喷墨打印机机构数字控制器合成的字长估计
Pub Date : 2007-03-22 DOI: 10.4304/jcp.3.4.50-57
Hung-Ming Cheng
The effect of FWL on the coefficients in implementing digital controllers has been the subject of many recent studies. Especially, this issue is more severe in the low budget consumer electronic products. To save the cost of development, most of the manufacturers applied cheap processors on those kinds of products. Therefore, it is desired to develop an estimation to predict the required word length while designing the controller. In this paper, the authors focus on study on an inkjet printing mechanism and investigate the effect of a controller without a proper word length. The authors develop an algorithm to estimate the required resolution and apply the method to determine the required bits of word length for the controller designed.
在实现数字控制器时,FWL对系数的影响一直是最近许多研究的主题。特别是在低预算的消费电子产品中,这个问题更为严重。为了节省开发成本,大多数制造商在这类产品上使用廉价的处理器。因此,在设计控制器时,需要开发一种估计来预测所需的字长。本文对喷墨打印的机理进行了研究,并探讨了没有适当字长控制器对喷墨打印的影响。作者开发了一种算法来估计所需的分辨率,并应用该方法来确定所设计的控制器所需的字长位。
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引用次数: 4
期刊
Proceedings 2007 IEEE SoutheastCon
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