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A Case Study of a Navigator Optimization Process 导航器优化过程的案例研究
Pub Date : 2017-03-31 DOI: 10.7236/IJASC.2017.6.1.26
D. Cho
When mobile navigator device accesses data randomly, the cache memory performance is rapidly deteriorated due to low memory access locality. For instance, GPS (General Positioning System) of navigator program for automobiles or drones, that are currently in common use, uses data from 32 satellites and computes current position of a receiver. This computation of positioning is the major part of GPS which accounts more than 50% computation in the program. In this computation task, the satellite signals are received in real time and stored in buffer memories. At this task, since necessary data cannot be sequentially stored, the data is read and used at random. This data accessing patterns are generated randomly, thus, memory system performance is worse by low data locality. As a result, it is difficult to process data in real time due to low data localization. Improving the low memory access locality inherited on the algorithms of conventional communication applications requires a certain optimization technique to solve this problem. In this study, we try to do optimizations with data and memory to improve the locality problem. In experiment, we show that our case study can improve processing speed of core computation and improve our overall system performance by 14%.
当移动导航设备随机访问数据时,由于内存访问局部性低,导致缓存性能迅速下降。例如,目前普遍使用的汽车或无人机导航程序GPS(通用定位系统)利用32颗卫星的数据,计算接收器的当前位置。定位计算是GPS的主要部分,占程序计算量的50%以上。在这个计算任务中,卫星信号被实时接收并存储在缓冲存储器中。在此任务中,由于不能按顺序存储必要的数据,因此随机读取和使用数据。这种数据访问模式是随机生成的,数据局部性低会影响内存系统的性能。因此,由于数据本地化程度低,难以对数据进行实时处理。改善传统通信应用算法继承的低存储器访问局部性需要一定的优化技术来解决这一问题。在本研究中,我们尝试对数据和内存进行优化,以改善局部性问题。在实验中,我们表明我们的案例研究可以提高核心计算的处理速度,并将系统的整体性能提高14%。
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引用次数: 0
A Study on Efficient Memory Management Using Machine Learning Algorithm 基于机器学习算法的高效内存管理研究
Pub Date : 2017-03-31 DOI: 10.7236/IJASC.2017.6.1.39
Beom-Joo Park, Min-Soo Kang, Minho Lee, Y. Jung
As the industry grows, the amount of data grows exponentially, and data analysis using these serves as a predictable solution. As data size increases and processing speed increases, it has begun to be applied to new fields by combining artificial intelligence technology as well as simple big data analysis. In this paper, we propose a method to quickly apply a machine learning based algorithm through efficient resource allocation. The proposed algorithm allocates memory for each attribute. Learning Distinct of Attribute and allocating the right memory. In order to compare the performance of the proposed algorithm, we compared it with the existing K-means algorithm. As a result of measuring the execution time, the speed was improved.
随着行业的发展,数据量呈指数级增长,使用这些数据进行数据分析是一种可预测的解决方案。随着数据量的增加和处理速度的提高,它已经开始结合人工智能技术和简单的大数据分析应用到新的领域。在本文中,我们提出了一种通过有效的资源分配快速应用基于机器学习的算法的方法。该算法为每个属性分配内存。学习属性的区别,分配正确的内存。为了比较所提出算法的性能,我们将其与现有的K-means算法进行了比较。由于测量了执行时间,速度得到了提高。
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引用次数: 3
A Study on the Public Data Activation Strategy based on App Developed by Non-Profession User 基于非专业用户开发App的公共数据激活策略研究
Pub Date : 2017-03-31 DOI: 10.7236/IJASC.2017.6.1.32
Young-Hyun Chang
In Korea, the act for promoting use of the public data has been enforced since 2013. The Key Government 3.0 Strategy was established for providing the public data as an obligation of public authorities for users to use them free of charge. The aim of open public data and using them targeted by the government is creation of a solution for vitalizing the economy by using the public data. However, the reason for low usability and tangible outcomes despite unlimited provision of open government data is as follows. That is, it is essential to address the issue of difficult software technology required to access public data for using the data. However, with the open API method currently provided, the development procedure is not easy even for IT students or specialized software developers. Therefore, strategies for each step ideal for the level of developers are required to vitalize applications based on the public data and developed by ordinary users. Two strategic methods can be used for facilitating the use of public data and applications developed by ordinary users suggested in this paper on the basis of the public data portal organized by the Ministry of the Interior and provided to all ordinary users. That is, they are applications developed in the web browser environment and those developed in the PC environment. They allow ordinary users to develop and distribute applications based on the public data to contribute to enforcing the policy for facilitating the use of public data of the government just with basic training and basic knowledge from the training without using program coding knowledge of open API which requires the knowledge of development professionals.
韩国从2013年开始实施了《公共信息利用促进法》。政府资讯科技3.0策略的目的,是把提供公众资料作为公共当局的义务,让使用者免费使用。政府公开公共数据并加以利用的目的,是为了利用公共数据,创造出激活经济的解决方案。然而,尽管无限制地提供开放的政府数据,但可用性和实际结果较低的原因如下。也就是说,必须解决访问公共数据以使用数据所需的困难软件技术问题。然而,在目前提供的开放API方法下,即使对IT学生或专业软件开发人员来说,开发过程也不容易。因此,每一步都需要适合开发人员水平的策略,以公共数据为基础,激活普通用户开发的应用程序。在内政部组织并提供给所有普通用户的公共数据门户的基础上,本文建议使用两种战略方法来促进公共数据和普通用户开发的应用程序的使用。即在web浏览器环境下开发的应用程序和在PC机环境下开发的应用程序。他们允许普通用户开发和分发基于公共数据的应用程序,为执行政策做出贡献,促进政府公共数据的使用,只需要基本的培训和培训的基本知识,而不需要使用开放API的程序编码知识,这需要开发专业人员的知识。
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引用次数: 3
IoT Enabled Smart Emergency LED Exit Sign controller Design using Arduino 基于Arduino的物联网智能紧急LED出口标志控制器设计
Pub Date : 2017-03-31 DOI: 10.7236/IJASC.2017.6.1.76
Joonseok Jung, Jongman Kwon, Joseph Mfitumukiza, Soonho Jung, Minwoo Lee, J. Cha
This paper presents a low cost and flexible IoT enabled smart LED controller using Arduino that is used for emergency exit signs. The Internet of Things (IoT) is become a global network that put together physical objects using network communications for the purpose of inter-communication of devices, access information on internet, interaction with users as well as permanent connected environment. A crucial point in this paper, is underlined on the potential key points of applying the Arduino platform as low cost, easy to use microcontroller with combination of various sensors applied in IoT technology to facilitate and establishment of intelligent products. To demonstrate the feasibility and effectiveness of the system, devices such as LED strip, combination of various sensors, Arduino, power plug and ZigBee module have been integrated to setup smart emergency exit sign system. The general concept of the proposed system design discussed in this paper is all about the combination of various sensor such as smoke detector sensor, humidity, temperature sensor, glass break sensors as well as camera sensor that are connected to the main controller (Arduino) for the purpose of communicating with LED exit signs displayer and dedicated PC monitors from integrated system monitoring (controller room) through gateway devices using Zig bee module. A critical appraisal of the approach in the area concludes the paper.
本文介绍了一种使用Arduino的低成本、灵活的物联网智能LED控制器,用于紧急出口标志。物联网(IoT)正在成为一个全球性的网络,它利用网络通信将物理对象组合在一起,以实现设备之间的相互通信、互联网上的信息访问、与用户的交互以及永久连接的环境。本文重点强调了应用Arduino平台的潜在关键点,即低成本,易于使用的微控制器与物联网技术中应用的各种传感器的组合,以促进智能产品的建立。为了验证系统的可行性和有效性,集成了LED灯条、各种传感器组合、Arduino、电源插头、ZigBee模块等器件,搭建智能紧急出口标识系统。本文所提出的系统设计的总体概念是将烟雾探测器传感器、湿度传感器、温度传感器、玻璃破碎传感器以及摄像头传感器等各种传感器组合在一起,这些传感器连接到主控制器(Arduino)上,通过zigbee模块的网关设备与集成系统监控(控制室)的LED出口标志显示器和专用PC监视器进行通信。本文最后对该领域的方法进行了批判性评价。
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引用次数: 5
Image Based 3D Reconstruction of Texture-less Objects for VR Contents 基于图像的VR内容无纹理物体三维重建
Pub Date : 2017-03-31 DOI: 10.7236/IJASC.2017.6.1.9
Jahanzeb Hafeez, Seung-hyun Lee, Soon-chul Kwon, Alaric Hamacher
Recent development in virtual and augmented reality increases the demand for content in many different fields. One of the fast ways to create content for VR is 3D modeling of real objects. In this paper we propose a system to reconstruct three-dimensional models of real objects from the set of two-dimensional images under the assumption that the subject does not has distinct features. We explicitly consider an object that is made of one or more surfaces and radiant constant energy isotropically. We design a low cost portable multi camera rig system that is capable of capturing images simultaneously from all cameras. In order to evaluate the performance of the proposed system, comparison is made between 3D model and a CAD model. A simple algorithm is also proposed to acquire original texture or color of the subject. Using best pattern found after the experiments, 3D model of the Pyeongchang Olympic Mascot “Soohorang” is created to use as VR content
虚拟现实和增强现实的最新发展增加了许多不同领域对内容的需求。为VR创建内容的快速方法之一是对真实物体进行3D建模。在本文中,我们提出了一种在假设物体没有明显特征的情况下,从二维图像集重建真实物体三维模型的系统。我们明确地考虑由一个或多个表面组成的物体,并各向同性地辐射恒定能量。我们设计了一个低成本的便携式多相机平台系统,能够同时捕获所有相机的图像。为了评估系统的性能,将三维模型与CAD模型进行了比较。提出了一种简单的算法来获取目标的原始纹理或颜色。利用实验后发现的最佳图案,制作了平昌奥运会吉祥物“Soohorang”的3D模型,作为VR内容使用
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引用次数: 13
The Developement of Real-time Information Support Cart System based on IoT 基于物联网的实时信息支持车系统的开发
Pub Date : 2017-03-31 DOI: 10.7236/IJASC.2017.6.1.44
Dong-Sung Seo, M. Kang, Y. Jung
In the modern technology era, it is possible to connect objects and the internet anytime and anywhere through IoT of hyper-connected society. Accordingly, a smart shopping cart was designed and realized by applying IoT. Therefore, this paper builds the IoT shopping cart system according to the trend of IoT environment.. When RFID is installed in the Arduino and the tagged item is inserted into the IoT shopping cart, the product information and price are displayed on the Arduino linked Raspberry Pi. We built a web server on the Raspberry Pi to handle this data, and built an App on the smartphone to implement the IoT shopping cart environment. Consumers can receive pricing and product information through smartphone apps through raspberry pie, can make quick calculations through smartphone, and provide various information to consumers through apps.
在现代科技时代,通过超连接社会的物联网随时随地连接物体和互联网成为可能。据此,设计并实现了一款应用物联网的智能购物车。因此,本文根据物联网环境的发展趋势,构建了物联网购物车系统。当在Arduino中安装RFID并将标记的商品插入物联网购物车时,产品信息和价格就会显示在Arduino连接的树莓派上。我们在树莓派上构建了一个web服务器来处理这些数据,并在智能手机上构建了一个App来实现物联网购物车环境。消费者可以通过覆盆子派通过智能手机应用程序接收价格和产品信息,可以通过智能手机快速计算,通过应用程序向消费者提供各种信息。
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引用次数: 0
Study on Distortion and Field of View of Contents in VR HMD VR头戴式显示器中内容畸变及视场的研究
Pub Date : 2017-03-31 DOI: 10.7236/IJASC.2017.6.1.18
H. Son, Hyoungjoon Jeon, Soon-chul Kwon
Recently, VR HMD (virtual reality head mounted display) has been utilized for virtual training, entertainment, vision therapy, and optometry. In particular, virtual reality contents are increasingly used for vision therapy and optometry. Accordingly, high-quality virtual reality contents such as a natural vision of life is required. Therefore, it is necessary to study the content production according to the optical characteristics of the VR HMD. The purpose of this paper is to suggest a proper FOV (field of view) of contents according to the distortion rate. We produced virtual reality contents and obtained distorted images by virtual camera. The distortion rate is calculated by using the distorted image. It is proved that the optimal FOV of the VR content with the minimum distortion is 90 ~ 100 °. The results of this study are expected to be applied to the production of high quality contents.
最近,VR HMD(虚拟现实头戴式显示器)已被用于虚拟训练、娱乐、视觉治疗和验光。特别是,虚拟现实内容越来越多地用于视觉治疗和验光。因此,需要高质量的虚拟现实内容,如生活的自然视觉。因此,有必要根据VR头戴式显示器的光学特性对内容制作进行研究。本文的目的是根据图像失真率给出合适的视场。我们制作虚拟现实内容,并通过虚拟摄像机获得畸变图像。利用畸变后的图像计算畸变率。结果表明,虚拟现实内容的最佳视场为90 ~ 100°,失真最小。本研究结果有望应用于高品质内容的制作。
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引用次数: 2
Simulated Dynamic C&C Server Based Activated Evidence Aggregation of Evasive Server-Side Polymorphic Mobile Malware on Android 基于激活证据聚合的Android规避服务器端多态移动恶意软件仿真动态C&C服务器
Pub Date : 2017-03-31 DOI: 10.7236/IJASC.2017.6.1.1
Hanseong Lee, Hyung-Woo Lee
Diverse types of malicious code such as evasive Server-side Polymorphic are developed and distributed in third party open markets. The suspicious new type of polymorphic malware has the ability to actively change and morph its internal data dynamically. As a result, it is very hard to detect this type of suspicious transaction as an evidence of Server-side polymorphic mobile malware because its C&C server was shut downed or an IP address of remote controlling C&C server was changed irregularly. Therefore, we implemented Simulated C&C Server to aggregate activated events perfectly from various Server-side polymorphic mobile malware. Using proposed Simulated C&C Server, we can proof completely and classify veiled server-side polymorphic malicious code more clearly.
各种类型的恶意代码,如规避服务器端多态被开发并在第三方开放市场上分发。可疑的新型多态恶意软件具有动态主动改变和变形其内部数据的能力。因此,由于其C&C服务器被关闭或远程控制C&C服务器的IP地址被不定期更改,因此很难将此类可疑交易作为服务器端多态移动恶意软件的证据进行检测。因此,我们实现了模拟C&C服务器来完美地聚合来自各种服务器端多态移动恶意软件的激活事件。利用本文提出的模拟命令与控制服务器,可以对隐蔽的服务器端多态恶意代码进行完整的证明和更清晰的分类。
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引用次数: 0
EL-SEP: Improved L-SEP by adding Single-hop layer EL-SEP:通过增加单跳层来改进L-SEP
Pub Date : 2017-03-31 DOI: 10.7236/IJASC.2017.6.1.50
Woosuk Lee, Kyedong Jung, Jong-Yong Lee
Wireless sensor nodes have limited energy, so it is important to optimize energy consumption to preserve network lifetime. Various protocols have been proposed for this purpose. LEACH protocol and SEP are the representative protocols. These protocols become less effective as the Sensor Field becomes wider. To improve this, MR-SEP and L-SEP were proposed. These protocols increase the energy efficiency by dividing the Sensor Field into layers and reducing the transmission distance. However, when dividing a layer, there are cases where it is divided inefficiently, and a node within a certain range from a Base Station has a better transmission efficiency than a direct transmission method using a cluster method. In this paper, we propose a Single-hop layer for L-SEP to improve inefficient layer division and near node transmission efficiency. When the larger the Sensor Field, the better the performance of the proposed method by up to 87%. The larger the sensor field, the more efficient the proposed method is over the conventional method. That is, the proposed method is suitable for the wide Sensor Field.
无线传感器节点的能量是有限的,因此优化能量消耗以保证网络的使用寿命是非常重要的。为此目的提出了各种协议。LEACH协议和SEP是具有代表性的协议。随着传感器领域的扩大,这些协议变得不那么有效。为了改进这一点,提出了MR-SEP和L-SEP。这些协议通过将传感器场分层并缩短传输距离来提高能量效率。但是,在划分层时,也会出现划分效率不高的情况,并且距离基站一定范围内的节点比使用集群方法直接传输的方式传输效率更高。为了提高L-SEP的分层效率和近节点传输效率,本文提出了L-SEP的单跳层。当传感器场越大时,该方法的性能越好,最高可达87%。传感器场越大,该方法的效率越高。也就是说,该方法适用于宽传感器领域。
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引用次数: 1
Designing of Assessment System using Multiple Devices based on NCS Professional Basic 基于NCS专业基础的多设备考核系统设计
Pub Date : 2016-12-31 DOI: 10.7236/IJASC.2016.5.4.48
Young-Hyun Chang, Chang-Bae Ko
In this paper, all elements used in integrated infrastructure for job competency assessments of NCS (National Competency Standards) will be merged into assessment system using multiple devices(ASMD). NCS is a systematic approach on required abilities (knowledge, technical expertise, attitude) to process the tasks in the fields by industry. Competiveness of ASMD design is that no limitation of time and space using personal devices like PC, laptop, smartphone, and tablet, while seeing screen, hearing, touching, speaking, and writing. Question type can be limitless to express the situation. To lead technologies and market for domestic and oversea assessment system, supporting on multiple devices with connectivity that will eliminate limitation of time and space is the key feature for design competitiveness. Design of integrated assessment system proposed in this paper can be applied to NCS, fundamental competency evaluation, online test, job aptitude test, and foreign language test which involve listening, reading, writing, and speaking. Compared with existing evaluation method, reduction of investment and operating cost will be greater. Along with development of ICT technologies, the next generation of integrated assessment system will be quickly changed to ASMD, which already involves connected service between internet and smart devices.
本文将国家胜任力标准(NCS)工作胜任力评估综合基础设施中使用的所有要素合并到多设备评估系统(ASMD)中。NCS是一种系统的方法,要求能力(知识,技术专长,态度)处理行业领域的任务。ASMD设计的竞争力在于不受时间和空间的限制,使用PC、笔记本、智能手机、平板等个人设备,同时看屏幕、听、触、说、写。题型可以无限制地表达情境。引领国内外评估系统的技术和市场,支持多设备连接,消除时间和空间限制是设计竞争力的关键特征。本文设计的综合评价系统可应用于网络信息系统、基础能力评价、在线测试、工作能力倾向测试、外语听、读、写、说测试。与现有的评价方法相比,投资和运行成本的降低幅度更大。随着信息通信技术(ICT)的发展,下一代综合评估系统将迅速转变为已经涉及互联网和智能设备之间连接服务的ASMD。
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引用次数: 0
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The International Journal of Advanced Smart Convergence
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