• 마이크로전자및패키징학회지
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• 제8권2호
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• pp.49-52
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• 2001

This paper presents product level considerations for multichip packaging as a cost effective alternative to single chip packaging in the design and manufacture of mobile telephony products. Important aspects include component functionality and complexity, acquisition and logistics costs, product modularity and integration. Multichip packaging offers unique solutions and significant system level cost savings in many applications including RF modules, digital matrix functions and product options such as security, data storage, voice recognition, etc.

• 한국디자인학회:학술대회논문집
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• 한국디자인학회 2005년도 추계 학술발표대회 논문집
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• pp.62-63
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• 2005

• 한국마이크로전자및패키징학회:학술대회논문집
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• 한국마이크로전자및패키징학회 2001년도 Proceedings of 6th International Joint Symposium on Microeletronics and Packaging
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• pp.1-7
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• 2001

This paper presents product level considerations for multichip packaging as a cost effective alternative to single chip packaging in the design and manufacture of mobile telephony products. Important aspects include component functionality and complexity, acquisition and logistics costs, product modularity and integration. Multichip packaging offers unique solutions and significant system level cost savings in many applications including RF modules, digital matrix functions and product options such as security, data storage, voice recognition, etc.

• 한국정보과학회논문지:시스템및이론
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• 제34권2호
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• pp.49-56
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• 2007

MEMS 기반 저장장치는 높은 대역폭과 저전력성, 고집적도, 저가 등의 특성으로 인해 모바일 기기에서 대용량 서버 시스템에 이르는 다양한 환경에서 사용가능한 차세대 저장장치이다. MEMS 기반 저장장치는 원판이 회전하는 하드디스크와 달리 매체가 사각형 구조로 되어 있으며 하나의 매체에 동시에 읽고 쓸 수 있는 수천 개의 헤드가 존재한다. 본 논문에서는 이와 같은 MEMS 기반 저장장치의 물리적 특성에 적합한 새로운 입출력 요청 스케줄링 기법을 제안한다. 새롭게 제안한 알고리즘은 사각형 평면상에서의 헤드의 탐색 시간뿐 아니라 수천 개의 헤드에 의한 병렬적인 입출력을 고려한다. 또한, 기아 현상(starvation)을 극복하기 위해 알고리즘에 노화 요소(aging factor)를 반영한다. 트레이스 기반 모의 실험을 통해 본 논문이 제안한 스케줄링 알고리즘이 기존의 대표적인 알고리즘인 SPTF(Shortest Positioning Time First) 알고리즘에 비해 평균 응답 시간과 응답 시간의 편차 측면에서 각각 39.2%와 62.4%가 향상됨을 보였다.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2015년도 제49회 하계 정기학술대회 초록집
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• pp.192.1-192.1
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• 2015

We demonstrated the nonvolatile memory functionality of nano-crystalline silicon (nc-Si) and InGaZnOxide (IGZO) thin film transistors (TFTs) using mobile protons that are generated by very short time hydrogen neutral beam (H-NB) treatment in gate insulator (SiO2). The whole memory fabrication process kept under $50^{\circ}C$ (except SiO2 deposition process; $300^{\circ}C$). These devices exhibited reproducible hysteresis, reversible switching, and nonvolatile memory behaviors in comparison with those of the conventional FET devices. We also executed hydrogen treatment in order to figure out the difference of mobile proton generation between PECVD and H-NB CVD that we modified. Our study will further provide a vision of creating memory functionality and incorporating proton-based storage elements onto a probability of next generation flexible memorable electronics such as low power consumption flexible display panel.

• 한국정밀공학회지
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• 제22권9호
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• pp.99-106
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• 2005

In recent years, vision sensors are widely used to mobile robot for navigation or exploration. The analog signal transmission of visual data being used in this area, however, has some disadvantages including noise weakness in view of the data storage. A large amount of data also makes it difficult to use this method for a mobile robot. In this paper, a digital data compressing technology based on MPEG4 which substitutes for analog technology is proposed to overcome the disadvantages by using DWT(Discreate Wavelet Transform) instead of DCT(Discreate Cosine Transform). The TI Company's DSP chip, TMS320C6711, is used for the image encoder, and the performance of the proposed method is evaluated by PSNR(Peake Signal to Noise Rates), QP(Quantization Parameter) and bitrate.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제10권5호
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• pp.1998-2014
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• 2016

In recent years, cloud computing services based on smart phones and other mobile terminals have been a rapid development. Cloud computing has the advantages of mass storage capacity and high-speed computing power, and it can meet the needs of different types of users, and under the background, mobile cloud computing (MCC) is now booming. In this paper, we have put forward a new classification-based virtual machine placement (CBVMP) algorithm for MCC, and it aims at improving the efficiency of virtual machine (VM) allocation and the disequilibrium utilization of underlying physical resources in large cloud data center. By simulation experiments based on CloudSim cloud platform, the experimental results show that the new algorithm can improve the efficiency of the VM placement and the utilization rate of underlying physical resources.

• 디지털융복합연구
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• 제12권5호
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• pp.263-269
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• 2014

모바일 클라우드 서비스는 모바일 단말을 통해 클라우드 서비스를 제공하는 것으로서, 모바일 기기의 컴퓨팅 처리 성능 한계, 저장 공간 제약 등으로 인해 모바일 단말에서 처리해야할 작업 및 데이터의 일부를 클라우드 환경으로 이동시켜 처리하는 서비스이다. 모바일 클라우드 서비스 활성화의 장애요인으로 서비스의 안정성에 대한 우려와 데이터 보안성 및 기밀성의 보안에 대한 우려가 높다. 특히 모바일 서비스와 클라우드 서비스가 융합되어, 각각의 위협이 복합적으로 파생되어 발생될 것으로 예상되고 있다. 이에 본 연구에서는 모바일 클라우드 서비스 유형과 모바일 클라우드에서 발생할 수 있는 보안위협을 정의하고, 모바일 앱에서의 보안 대응방안과 기업의 대응방안을 제시하였다. 모바일 앱에서의 보안은 사용자 정보 보호를 중심으로 한 모바일 애플리케이션 검증을 제시하였으며, 기업의 대응방안으로는 클라우드 제공자와 사용자 관점에서의 대응방안을 기술하였다.

• 반도체디스플레이기술학회지
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• 제7권3호
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• pp.17-21
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• 2008

Application of flash memory in mobile and ubiquitous related devices is rapidly being increased due to its low price and high performance. In addition, some notebook computers currently come out into market with a SSD(Solid State Disk) instead of hard-drive based storage system. Regarding this trend, applications need to increase the storage capacity using multiple flash memory chips for larger capacity sooner or later. Flash memory based storage subsystem should resolve the performance bottleneck for writing in perspective of speed and lifetime according to its physical property. In order to make flash memory storage work with tangible performance, reclaiming of invalid regions needs to be controlled in a particular manner to decrease the number of erasures and to distribute the erasures uniformly over the whole memory space as much as possible. In this paper, we study the performance of flash memory recycling algorithms and demonstrate that the proposed algorithm shows acceptable performance for flash memory storage with multiple chips. The proposed cleaning method partitions the memory space into candidate memory regions, to be reclaimed as free, by utilizing threshold values. The proposed algorithm handles the storage system in multi-layered style. The impact of the proposed policies is evaluated through a number of experiments.

• 한국수산과학회지
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• 제38권4호
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• pp.239-244
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• 2005

The effects of diluents composition on cold storage for olive flounder (Paralichthys olivaceus) sperm were examined in terms of the swimming speed of sperm, the percentage of mobile sperm, and fertilization rates. The following results indicated that cold storage methods with fresh conditions could be employed in olive flounder milt preservation. The preserved sperm of olive flounder that was diluted I: 10 with artificial seminal plasma II (ASP II) and Stein's solution (SS) at $0^{\circ}C$ remained motile for 30 days. The most effective condition for cold storage was ASP II and SS at 0 $0^{\circ}C$ for the sperm, although there is no significant difference statistically. No difference in the fertilization rate was found between fresh sperm and the preserved ones with ASP I, II and SS at 10 days post-storage.