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The on-chip network of emerging many-core CMPs enables the sharing of numerous on-chip components. This on-chip network needs to ensure fairness when accessing the shared resources. In this work, we propose providing equality of service (EoS) in future many-core CMPs on-chip networks by leveraging distance, or hop count, to approximate the age of packets in the network. We propose probabilistic arbitration...
Higher transistor counts, lower voltage levels, and reduced noise margin increase the susceptibility of multicore processors to transient faults. Redundant hardware modules can detect such errors, but software transient fault detection techniques are more appealing for their low cost and flexibility. Recent software proposals double register pressure or memory usage, or are too slow in the absence...
Memory access latency has a significant impact on application performance. Unfortunately, the random access latency of DRAM has been scaling relatively slowly, and often directly affects the critical path of execution, especially for applications with insufficient locality or memory-level parallelism. The existing low-latency DRAM organizations either incur significant area overhead or burden the...
Web browsing is one of the most important applications for personalized consumer electronics devices such as smartphones and tablets. It is common usage pattern on these devices for a user to visit a relatively small set of websites repeatedly, which dominates the total browsing time. Exploiting this, modern web browsers cache downloaded resources in local disks such as HTML/JavaScript files and image...
We present the measurement system for electrical characteristics of inhomogeneous and anisotropic carbon fiber reinforced polymer(CFRP) material by employing waveguide and 2-port measuring method. The effective permittivity and conductivity of CFRP have been estimated according to the fiber direction for radar application in the frequency range from 8GHz to 12GHz.
This paper describes the turnstile junction-based OMT(Ortho-mode Transducer). It is usually well-known that turnstile junctions have symmetry structure of waveguide so the higher order modes, which occur inside the waveguide, can be easily cancelled. Because of this structure, the turnstile junction-based OMTs have high isolation and low return loss characteristics in broadband and are good for easy...
Interpreters are widely used to implement high-level language virtual machines (VMs), especially on resource-constrained embedded platforms. Many scripting languages employ interpreter-based VMs for their advantages over native code compilers, such as portability, smaller resource footprint, and compact codes. For efficient interpretation a script (program) is first compiled into an intermediate representation,...
Efficient cache tag management is a primary design objective for large, in-package DRAM caches. Recently, Tagless DRAM Caches (TDCs) have been proposed to completely eliminate tagging structures from both on-die SRAM and in-package DRAM, which are a major scalability bottleneck for future multi-gigabyte DRAM caches. However, TDC imposes a constraint on DRAM cache block size to be the same as OS page...
Despite extensive research into the pathogenesis of acute lung injury (ALI) and the acute respiratory distress syndrome (ARDS), mortality remains high, approaching 30% even with lung-protective ventilation and a fluid conservative strategy. Pharmacologic therapies that reduce the severity of lung injury in vivo and in vitro have not yet been translated into effective clinical treatment options. Therefore,...
Automatic parallelization has shown promise in producing scalable multi-threaded programs for multi-core architectures. Most existing automatic techniques parallelize independent loops and insert global synchronization between loop invocations. For programs with many loop invocations, frequent synchronization often becomes the performance bottleneck. Some techniques exploit cross-invocation parallelism...
This paper presents an easier method for the prediction of the field strength inside multiple cavities with a relatively high volume by using the analysis method based on statistical approaches. For the accurate analysis, in general, FDTD, FEM, MOM requiring much time-consumption in employing and solving a complete Maxwell equations have been provided by many commercial software companies. Compared...
This paper describes the comparison of the mutual coupling mechanisms between two different feeding structures such as coplanar waveguides and SIW-based feeding in array antenna for the application of satellite communication. It is usually well-know that both feeding structures of co-planar waveguides and SIWs are good candidates for the design of high frequency antenna with the help of easy integration,...
This paper describes SIW(Substrate Integrated Waveguide)-based feeding antenna for the application of SDR(Software Defined Radar). It is usually well-known that SIWs are good for easy integration, low-loss and electromagnetically immunized characteristics. In particular, it is shown that the size of the antenna is reduced significantly (37.2%) due to the application of meander line structure. The...
This paper introduces a tagless cache architecture for large in-package DRAM caches. The conventional die-stacked DRAM cache has both a TLB and a cache tag array, which are responsible for virtual-to-physical and physical-to-cache address translation, respectively. We propose to align the granularity of caching with OS page size and take a unified approach to address translation and cache tag management...
Through-Silicon Interposer (TSI) has recently been proposed to provide high memory bandwidth and improve energy efficiency of the main memory system. However, the impact of TSI on main memory system architecture has not been well explored. While TSI improves the I/O energy efficiency, we show that it results in an unbalanced memory system design in terms of energy efficiency as the core DRAM dominates...
In this article, the PWB(Power Balance) method and BLT(Baum-Liu-Tesche) Equation are combined to analyze the small PCB structure inside an electrically large cavity. Practically, the electrically large cavity has a disadvantage in evaluating the field inside the cavity precisely because of multiple reflection and resonance phenomena. In addition, it needs much time-consumption to carry out the field...
In this article, a structural modification of S-band turnstile antenna to enhance the axial ratio beamwidth by attaching parasitic elements is suggested and investigated. Through the parametric studies and optimization, the positions, shapes and values of the final optimized elements have been obtained with two crossed Bow-tie dipole antennas. The overall structure is composed of main radiator and...
In this paper, a design scheme for secant pattern radiator is presented. By combining a CP (Circular Polarization) generating adapter and a secant pattern radiator, a secant pattern antenna is designed. A secant pattern antenna is suitable for the data transmission in LEO satellite requiring wide angle coverage of the earth for the longer time visibility. In addition, secant pattern antenna is smaller...
In this paper, modified triangular-shaped waveguide-typed septum polarizer has been suggested and verified by using commercially available software and carrying out the comparison with the conventional rectangular waveguide-typed polarizer. It is expected that the proposed structure shows the better electrical performances than the conventional one in terms of the smooth energy-transfer of TE10 and...
In this paper, a design scheme for isoflux pattern antenna suitable for SAR data transmission is presented. An isoflux pattern is suitable for SAR data transmission of LEO satellite requiring wide angle coverage of the earth for the longer time visibility. Also, it is advantageous to provide uniform power density over the earth and constant power transmission to the ground station during the passage...
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