Chip multiprocessors (CMPs) emerge as a dominant architectural alternative in high-end embedded systems. Since off-chip accesses require a long latency and consume a large amount of power, CMPs are ...typically based on multiple levels of on-chip cache memories. To meet the performance demand and power budget, an efficient support for memory hierarchy is important. We propose an on-chip L2 cache organization which takes advantage of both a private L2 cache and a shared L2 cache to improve the performance and reduce energy consumption. Our L2 cache organization is based on a private L2 cache organization which has the short access latency. When a cache block in the private L2 cache is selected for an eviction, our proposed organization first evaluates the reusability of the cache block. If the cache block is likely to be reused, we save the evicted cache block in one of peer L2 caches which may have efficiently invalid blocks. By selectively writing evicted cache blocks to peer L2 caches, the proposed L2 cache organization can effectively simulate a shared L2 cache. Experimental results using a CMP simulator showed that the proposed L2 cache organization improved the average memory latency by up to 27% and reduced energy consumption by up to 16.6% over a 256KB private L2 cache organization for the SPLASH2 benchmark programs..
In this work, we present enhanced data retention characteristics of flexible printed organic nonvolatile thin-film transistor (TFT) memories using a phase-separated polymer blocking layer. The memory ...devices are configured in a bottom-gate bottom-contact TFT structure with a bilayer dielectric layer consisting of a high-k insulator poly(vinylidene fluoride-co-trifluoroethylene) and a low-k chargeable polymer Parylene at the bottom and top, respectively. All the functional layers are solutionprocessed or printed except for the Parylene film. The blend ink containing a small-molecule semiconductor 6,13-Bis(triisopropylsilylethynyl)pentacene (TIPS-pentacene) and insulating polymer polystyrene (PS) are printed on the TFT active area. As dried, the printed ink leaves the phase-separated layers of PS and TIPS-pentacene due to the density difference. The bottom PS performs as a blocking layer to the charge stored in the electret Parylene beneath. The printed nonvolatile memory with the phase-separated PS exhibited significantly improved data retention time of over 10 years, compared with that of the pristine TIPS-pentacene memory devices (only few hours). We believe these results suggest a facile way to fabrication of printed organic memories that have long data retention characteristics.
A staggered organic thin-film transistors (TFTs) have considerable benefits of charge injection. The contact resistance of a OTFT with top-contact structure is typically lower, compared to that of a ...bottom-contact device. However, the staggered bottomgate organic TFTs fabricated by printing are very rare due to the difficulties of printing contact electrodes on solution-processed organic semiconductors (OSCs). In this study, we demonstrate the fabrication of flexible bottom-gate top-contact organic TFTs by optimizing the inkjet printing process of Ag nanoparticles on an OSC surface. All the layers of the printed TFTs, including organic semiconductors and silver nanoparticles, were formed by printing methods except for Parylene dielectric layer that was deposited by chemical vapor deposition. The printed staggered TFTs exhibited remarkably high carrier mobility and low threshold voltage, compared with coplanar counterparts, due to reduced contact resistance. Our approach to printing staggered TFTs can lead to flexible functional circuit with high electrical characteristics.
대형 유리-세라믹 복합 매질 소결체 제조 시 비등방성 변형 특성 평가 김광욱; 손성준; 김지민 ...
Journal of nuclear fuel cycle and waste technology (Online),
03/2020, Letnik:
18, Številka:
1
Journal Article
Odprti dostop
We studied the anisotropic shrinkage and deformation characteristics of large size sintered bodies in the manufacturing of glass-ceramic composite wasteform. We used uranium-bearing waste, generated ...from the treatment of spent uranium catalyst. Sintered specimens were prepared in several forms, comprising a circular disk, and a quarter disk in several diameters of up to 40 cm. Regardless of form or size, the sintered bodies had high isotropic shrinkage when they were fabricated using green bodies prepared at 60 MPa. The average anisotropy rate and average shrinkage rate were 1.6%, and 37.4%, respectively. We confirmed that the glass-ceramic composite wasteform in a large scale disk-type for packing in a 200 L drum could be fabricated with a tolerable anisotropy shrinkage. This has resulted in a significant reduction in the volume of radioactive waste to be disposed of with highly stable wasteform. 본 연구에서는 우라늄 폐촉매 처리 공정에서 발생하는 우라늄 함유 폐기물 대상으로 유리-세라믹 매질 구조의 대형 디스크 소결체 형태로 제작 시, 최종 제작된 소결체의 비등방향 수축 특성 및 변형율 변화를 연구하였다. 본 연구에서는 최대 직경 40 cm를 갖는 다양한 크기 원형 디스크 형태와 원형 디스크의 1/4 크기의 부채꼴 형 소결체를 제작하여 이들의 비등방성 수축 특성을 평가하였다. 60 MPa 압력하에서 만들어지는 성형체는 소결 시 성형체의 크기 및 형태에 관계없이 높은 등방성 수축하였다. 제조된 전체 소결체에 대한 비등방성율은 평균 1.6%이었고 이때 평균 부피 감용율은 37.4% 이었다. 이러한 결과로부터 국내에서 발생한 우라늄 폐촉매를 처리하기 위한 공정에서 발생하는 우라늄 함유 폐기물은 대형 디스크 형태의 유리-세라믹 매질 형태로 고형화함으로써 높은 안정성과 부피감용 효과를 가지며 200 L 드럼에 포장될 수 있음이 확인되었다.
The semantic PARLAY for 4G network Sungjune Hong; Sunyoung Han; Byounguk Choi ...
2005 2nd Asia Pacific Conference on Mobile Technology, Applications and Systems,
2005
Conference Proceeding
This paper describes the semantic PARLAY X with QoS/QoE for 4G network. New open network service delivery platform standards such as PARLAY X support dynamically the seamless mobile application on ...top of different wireless network technology in face of changing value chains and business models. But the existing PARLAY X lacks in considering QoS/QoE. Therefore, to solve this issue, this paper suggests the semantic PARLAY X with QoS/QoE. The object of this paper is to support the architecture and the application programming interface (API) of the network service for QoS/QoE in NGN. The semantic PARLAY X can provide users with QoS/QoE in network according to the detected context and user's preference, after detecting the context such as location and speed and user's preference. The architecture of the semantic PARLAY X is comprised of the functions for context-awareness, adaptation, personalization. The semantic PARLAY X is to make a role of the broker between SCE and PARLAY gateway
Distributed object applications can be made fault tolerant by replicating their constituent objects, and by distributing these replicas across the different computers in the network. The idea behind ...object replication is that the failure of one replica of an object can be masked from a client of the object because the other replicas can continue to perform any operation that the client requires. We propose IFTS (Intelligent Fault Tolerant CORBA Service) for handling faults of server object replica using a replication concept to support fault tolerance. It can choose the fastest primary replica using the multicast mechanism. It also introduces passive replication for secure fault tolerance. Furthermore, we propose the design and implementation of IFTS service to provide reliability and faster service using multicast technology by extending existing CORBA ORB.
This paper describes a design and implementation of an object-oriented naming service on real-time CORBA, which is suited for multimedia applications on distributed environment. Existing caching ...servers are not suited for real-time multimedia applications due to bandwidth and latency problems. Real-time multimedia applications require an application-level approach to solve the current caching problems and a mechanism to support QoS on the CORBA environment. This paper proposes a transparent CORBA naming service for CgR and RIOP on real-time CORBA which adapts RSVP to CORBA GIOP.
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