• Title, Summary, Keyword: PDA

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Design and Implementation of Automatic Installation System for Application Synchronization in PDA (개인 휴대단말에서 응용 프로그램 동기화를 위한 자동설치 시스템의 설계 및 구현)

  • Na, Seung-Won;Oh, Se-man
    • The KIPS Transactions:PartA
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    • v.10A no.6
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    • pp.685-690
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    • 2003
  • The application for PDA as a new wireless Internet device is variously developed to improve the function of PDA, and the application software must be installed to PDAs. In addition. when the power supply of PDA becomes fully discharged, all data stored in the RAM (Random Access Memory) could be vanished, and then the application programs should be reinstalled. This paper presents an automatic installation system of application program, PAIS (PDA Automatic Installation System). It is designed to solve the problem of PDA that PDA's users have to install the application programs on their PDA themselves. When this engine is applied, PDA users can save the time and effort for installation. It's convenient for the PDA users. The PDA and application software company can save the cost to create materials to explain the installation process.

Running Large-scale Mobile Software using PDA Cluster Computing (PDA 클러스터 컴퓨팅을 활용한 대용량 모바일 소프트웨어 실행)

  • Min, Hye-Rhyn;Lee, Jong-Woo
    • Journal of Digital Contents Society
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    • v.10 no.2
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    • pp.249-258
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    • 2009
  • As wireless internet markets become larger than before, many mobile applications are also being developed actively. In this circumstances mobile devices such as cell phones, PDAs are playing an important role to satisfy the user's need of ubiquitous computing. Due to the hardware limitations, however, the mobile devices like PDA can not run large-scale softwares by itself. The main goal of this paper is to make large-scale applications runnable on PDA. To accomplish this, we used the PDA-JPVM cluster computing engine which has been already developed by us. We found out by running the applications and the performance evaluation that large-scale Java softwares can easily run on the hardware-limited PDA. And the performance evaluation results are also presented.

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Sementic Analysis of PDA (Paralinguistic Digital Affordances) in Social Media :Focusing on College Student (소셜미디어의 디지털 준언어 행동유도(PDA : Paralinguistic Digital Affordances) 의미 해석: 대학생을 중심으로)

  • Cha, Young Ran
    • The Journal of the Korea Contents Association
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    • v.17 no.5
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    • pp.410-422
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    • 2017
  • This study researches PDA (Paralingustic Digital Affordances) in the social media on the basis of Uses and Gratification theory. The study defines PDA as Likes in Facebook and Instagram and Favorites in Twitter. The study inquiries into the motivation of using PDA and interpretational way when Social media users play a role of a sender or a receiver. For this research purpose, the focus group and interview were conducted with 36 college student in the Korea metropolitan area. The research is to comprehend the motivation and satisfaction of using PDA by applying structured theory frame of Uses and Gratification. As a result, it contributes to more satisfactions when PDA users interact each other as a sender and a receiver than mere verbal-communication. Furthermore, PDA in each social media has different meaning and gravity. For instance, Likes in Instagram is considered less important and lighter than Likes in Facebook. Moreover, people use the PDA without any restriction. People favorably use PDA most of the time, but sometimes they use in contradictory or sarcastic way.

Residual Stress Behavior of PMDA/6FDA-PDA Copolyimide Thin Films (PMDA/6FDA-PDA 공중합 폴리이미드의 잔류응력 거동)

  • Jang, Won Bong;Chung, Hyun Soo;Joe, Yungil;Han, Haksoo
    • Applied Chemistry for Engineering
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    • v.10 no.7
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    • pp.1014-1019
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    • 1999
  • Copolyamic acid PMDA/6FDA-PDA(PAA) and homopolyamic acids PMDA-PDA(PAA) and 6FDA-PDA(PAA) were synthesized from 1,2,4,5-benzenetetracarboxylic dianhydride(PMDA) and 2,2'-bis(3,4-dicarboxyphenyl) hexafluoropropane dianhydride(6FDA) as the dianhydride and 1,4-phenylenediamine (PDA) as the diamine. Residual stresses were detected in-situ during thermal imidization of the co- and homopolyimide precursors as a function of processing temperature over the range of $25{\sim}400^{\circ}C$ using thin film stress analyzer(TFSA), and morphological structures were investigated by WAXD. In comparison, the resultant residual stress of polyimide films composed of different compositions decreased with the increasing content of PMDA unit in the chain and was about 5 Mpa in compression mode for PMDA-PDA. In this study, the synthesis of random PMDA/6FDA-PDA copolyimide could be completed and compensate for the difficulty of process due to high $T_g$ of PMDA-PDA and relatively higher stress of 6FDA-PDA. It showed that we can make a low level stress copolyimied having excellent mechanical properties by incorporating appropriate rod-like rigid structure PMDA-PDA unit into 6FDA-PDA polyimide backbone which generally shows higher stress due to rotational hinges such as bulky di(trifluoromethyl). Specially, PMDA/6FDA-PDA(0.9:0.1:1.0) satisfied excellent mechanical property and low level stress as an inter layer showing low dielectric constant.

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A Design and Implementation of PDA Learning System for Ubiquitous Learning (유비쿼터스 러닝을 위한 PDA 학습 시스템의 설계 및 구현)

  • Kim, Jee-Young;Lee, Young-Seok;Cho, Jung-Won;Choi, Byung-Uk
    • 한국정보교육학회:학술대회논문집
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    • pp.29-37
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    • 2005
  • 유비쿼터스 러닝을 가능하게 하기 위해서는 학습자의 지속적인 학습 결과 관리와 다양한 기기에 적합한 콘텐츠 표현 방안 그리고 이 기종 시스템들 간의 동기화 문제 등이 해결되어야 한다. 본 논문에서는 PDA를 사용하는 학습자들에게 학습 콘텐츠를 제공하고, PDA 상에서 학습을 할 수 있게 한 후, 학습자의 학습 결과를 서버로 동기화 할 수 있는 PDA 학습 시스템을 설계하고 구현하고자 한다. PDA 학습 시스템은 학습을 위한 PDA 어플리케이션과 학습 결과 처리를 위한 PDA 서버로 구성된다. PDA 서버는 XML형태의 문제 파일을 생성하고, PDA 어플리케이션에 이를 제공하며, PDA내의 학습 결과를 서버의 학습 결과와 동기화 시켜주는 기능을 한다. 제안하는 시스템을 교육 현장에 적용하고, 그 문제점을 분석하여 개선해 나간다면 유비쿼터스 러닝을 실천하기 위한 기반연구로서 활용될 수 있을 것이다.

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PDA-based Text Extraction System using Client/Server Architecture (Client/Server구조를 이용한 PDA기반의 문자 추출 시스템)

  • Park Anjin;Jung Keechul
    • Journal of KIISE:Software and Applications
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    • v.32 no.2
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    • pp.85-98
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    • 2005
  • Recently, a lot of researches about mobile vision using Personal Digital Assistant(PDA) has been attempted. Many CPUs for PDA are integer CPUs, which have no floating-computation component. It results in slow computation of the algorithms peformed by vision system or image processing, which have much floating-computation. In this paper, in order to resolve this weakness, we propose the Client(PDA)/server(PC) architecture which is connected to each other with a wireless LAN, and we construct the system with pipelining processing using two CPUs of the Client(PDA) and the Server(PC) in image sequence. The Client(PDA) extracts tentative text regions using Edge Density(ED). The Server(PC) uses both the Multi-1.aver Perceptron(MLP)-based texture classifier and Connected Component(CC)-based filtering for a definite text extraction based on the Client(PDA)'s tentativel99-y extracted results. The proposed method leads to not only efficient text extraction by using both the MLP and the CC, but also fast running time using Client(PDA)/server(PC) architecture with the pipelining processing.

PDA-based Supervisory Control of Mobile Robot (PDA를 이용한 이동로봇 제어)

  • Kim, Seong-Joo;Jung, Sung-Ho;Kim, Yong-Taek;Jeon, Hong-Tae
    • Journal of Korean Institute of Intelligent Systems
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    • v.12 no.4
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    • pp.379-384
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    • 2002
  • This paper represents the mobile robot system remote controlled by PDA(personal digital assistance). So far, owing to the development of internet technologies, lots of remote control methods through internet have been proposed. To control a mobile robot through internet and guide it under unknown environment, We propose a control method activated by PDA. In a proposed system, PDA acts as a user interface to communicate with notebook as a controller of the mobile robot system using TCP/IP protocol, and the notebook controls the mobile robot system. The information about the direction and velocity of the mobile robot feedbacks to the PDA and the PDA send new control method produced from the fuzzy inference engine.

신규제품 아키텍처 개발을 위한 기업조직의 설계 -PDA 개발에 있어 샤프와 카시오의 개발조직 비교 분석-

  • Wi, Jeong-Hyeon
    • Proceedings of the Technology Innovation Conference
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    • pp.44-68
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    • 2005
  • The purpose of this paper is to analyze the organizational design and management of product development in creating new product architecture by an established firm. For the purpose, the paper put up the organizational design in the process of PDA(Personal Digital Assistant) development of Sharp and Casio which were Japanese major PDA firms in 1990s. PDA is the product born through architectural change from Electronic Organizer. Prior research on the product architecture change and organizational adaptation emphasized that an established firm is difficult to adapt to new product architecture due to the restriction of prior technology or organizational inertia. For overcoming these problems and successful development of new product architecture, organizational design and management in the process of product development becomes essential. In case of Sharp, corporate development project team had been used to overcome the restrictions from architectural knowledge accumulated through previous product. After launching first new PDA by corporate development project team, Sharp created a new division and pushed an evolution of PDA, when new PDA market start to grow up rapidly toward a major market segmentation. As a result, Sharp was able to build up stable PDA project trajectory. However, Casio was late for three years in launching of new PDA architecture because previous division charging of Electronic Organizer tried to develop first new PDA. Casio's PDA development was prohibited by engineers of previous division because new PDA architecture was inferior on user interface and display definition. That is, Casio's first PDA development was restricted by architectural knowledge of previous product.

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A Study on the Application and Utilization of PDA in u-Learning (u-러닝에서 PDA 적용 방안 및 활용에 관한 연구)

  • Baek, Jang-Hyeon
    • Journal of The Korean Association of Information Education
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    • v.9 no.3
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    • pp.511-522
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    • 2005
  • The rapid development of information & communication technology has changed the paradigm of education. Recently the area of education is introducing u-Learning, in which learning is possible at any time and in any place through personal information devices such as PDA, tablet PC and mobile phone terminals. Taking advantage of the mobility and individuality of personal information devices, u-Learning can provide learning customized to the characteristics of individual learners without the limitations of time and space and can be effective in situational learning and experiential learning. In order to identify the uses of PDA in teaching.learning and to develop a basic teachinglearning model using PDA, the present study applied PDA directly to classes and examined the effects. According to the result, most students were satisfied with classes utilizing PDA but problems were also found in connection, insufficient contents for PDA, the quality of screen, etc.

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An Evaluation of Multimedia Data Downstream with PDA in an Infrastructure Network

  • Hong, Youn-Sik;Hur, Hye-Sun
    • Journal of Information Processing Systems
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    • v.2 no.2
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    • pp.76-81
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    • 2006
  • A PDA is used mainly for downloading data from a stationary server such as a desktop PC in an infrastructure network based on wireless LAN. Thus, the overall performance depends heavily on the performance of such downloading with PDA. Unfortunately, for a PDA the time taken to receive data from a PC is longer than the time taken to send it by 53%. Thus, we measured and analyzed all possible factors that could cause the receiving time of a PDA to be delayed with a test bed system. There are crucial factors: the TCP window size, file access time of a PDA, and the inter-packet delay that affects the receiving time of a PDA. The window size of a PDA during the downstream is reduced dramatically to 686 bytes from 32,581 bytes. In addition, because flash memory is embedded into a PDA, writing data into the flash memory takes twice as long as reading the data from it. To alleviate these, we propose three distinct remedies: First, in order to keep the window size at a sender constant, both the size of a socket send buffer for a desktop PC and the size of a socket receive buffer for a PDA should be increased. Second, to shorten its internal file access time, the size of an application buffer implemented in an application should be doubled. Finally, the inter-packet delay of a PDA and a desktop PC at the application layer should be adjusted asymmetrically to lower the traffic bottleneck between these heterogeneous terminals.