scholarly journals High Performance Technology in Algorithmic Cryptography

2018 ◽  
Author(s):  
Arturo Lezama-León ◽  
José Juan Zarate-Corona ◽  
Evangelina Lezama-León ◽  
José Angel Montes-Olguín ◽  
Juan Ángel Rosales-Alba ◽  
...  
Keyword(s):  
High Performance ◽  
Performance Technology

Double-Sided Microchannel Cooling of a Power Electronics Module Using Power Overlay

2009 ◽  
Author(s):  
Adam G. Pautsch ◽  
Arun Gowda ◽  
Ljubisa Stevanovic ◽  
Rich Beaupre
Keyword(s):  
Power Electronics ◽  
High Performance ◽  
Mechanical Response ◽  
Thermal Contact ◽  
Small Scale ◽  
Micro Channel ◽  
Performance Technology ◽  
Actual Performance ◽  
Low Performance ◽  
Microchannel Cooling

In the continuing effort to alleviate the increasing thermal loads for power electronics devices, numerous aggressive solutions have been developed, such as small-scale micro-channel heat exchangers. Although these methods can improve overall surface heat transfer to the order of 500 W cm−2, they are limited to single-sided cooling due to the typical wire-bonded electrical connections of the devices. Power overlay (POL) technology provides a stable planar structure for electrical connection, as well as attachment of an additional top-side heat exchanger. This study presents an analysis of double-sided microchannel cooling of a power electronics module. Two optimized, integral micro-channel heat sinks were attached above and below silicon power devices, with more traditional attachment on one side and a POL interface on the other. A compliant TIM was selected for low thermal resistance and good mechanical response, which allowed top-side connection to the POL surface. A theoretical model is presented that predicts the benefit of double-sided cooling based on the known performance of a single-sided heat sink and given addition thermal contact resistance for the top side. For microchannels with water, an enhancement of 26% was predicted. An experiment was also carried out to measure the actual performance benefit seen with double-sided cooling. An enhancement of over 30% was measured for a particular design. As the theory predicts, the benefit of double-sided cooling is limited for high performance designs. However, double-sided cooling could lead to high levels of thermal performance using low-performance technology.

Hydrostatically Coupled Dielectric Elastomer Actuators: New Opportunities for Haptics

2011 ◽  
Vol 1312 ◽  
Author(s):  
Federico Carpi ◽  
Gabriele Frediani ◽  
Danilo De Rossi
Keyword(s):  
High Performance ◽  
New Technology ◽  
Relative Displacement ◽  
Dielectric Elastomer ◽  
Tactile Feedback ◽  
Haptic Interfaces ◽  
Silicone Grease ◽  
Performance Technology ◽  
Hydrostatic Transmission ◽  
Dielectric Elastomer Actuators

ABSTRACTDielectric elastomer actuators (DEAs) have been demonstrated to represent today a high-performance technology for electromechanical transducers based on electroactive polymers. As a means to improve versatility and safety of DEAs for several fields of application, so-called ‘hydrostatically coupled’ DEAs (HC-DEAs) have recently been described. HC-DEAs are based on an incompressible fluid that mechanically couples a DE-based active part to a passive part interfaced to the load, so as to enable hydrostatic transmission. This paper presents ongoing developments of bubble-like HC-DEAs and their promising potential application in the field of haptics. In particular, the first part of the paper describes a static and dynamic characterization of a prototype actuator made of two pre-stretched membranes (20 mm wide, 1.8 mm high, and 60 μm thick) of 3M VHB acrylic elastomer, coupled via silicone grease. The actuator exhibited a maximum stress of 1.3 kPa at 4.4 kV, a relative displacement of -80% at 4.4 kV, a -3dB bandwidth of 3 Hz, and a resonance frequency of 160 Hz. The second part of the paper presents possible applications of the tested actuator configuration for haptic interfaces. Two specific examples are considered. The first deals with a wearable tactile/haptic display used to provide users with tactile feedback during electronic navigation in virtual environments. The display consists of HC-DEAs arranged in contact with finger tips. As a second example of usage, an up-scaled prototype version of an 8-dots refreshable cell for dynamic Braille displays is shown. Each Braille pin consists of a miniature HC-DEA, with a diameter lower than 2 mm. Both types of applications clearly show the potential of the new technology and the prospective opportunities for haptics.

scholarly journals Feasibility of Different Drying Methods to Remedy Deep-sea Mining Tailings Using the Formation of Alginate-rhamnolipid Complexes With Harmful Heavy Metals Contained in Manganese Nodules

2020 ◽  
Author(s):  
Aleum Lee ◽  
KYOUNGREN KIM
Keyword(s):  
Heavy Metals ◽  
Deep Sea ◽  
High Performance ◽  
High Efficiency ◽  
Drying Methods ◽  
Manganese Nodules ◽  
Performance Technology ◽  
Good Potential ◽  
High Concentrations ◽  
High Temperature Drying

Abstract This study investigated the usability of two drying methods to recover heavy metals contained in manganese nodules. Materials containing harmful heavy metals would be discharged during deep-sea mining processes. To improve the efficiency of future remediation practices, high-performance technology should have to be applied. Herein, two nontoxic and bio-derived substances, alginate and rhamnolipids, were used to form complexes. The complexes formed a complicated alginate-rhamnolipid (Alg-Rh) structure and that could prohibit heavy metals from being discharged by solidifying them within the complex. The content, appearance, composition, and particles of the Alg-Rh complexes formed by two drying methods—freeze-drying and high-temperature drying—were studied. In particular, metal compositions were observed between the different drying methods. These methods were found to provide good potential for remediating high concentrations of target heavy metals. Therefore, these findings can be used as a basis for future remediation technologies, including useful heavy metal recovery and high-efficiency separation.

scholarly journals Performance Analysis of Specification Computer and Mobile with Implementation Tawaf Virtual Reality using A* Algorithm and RVO System

2019 ◽  
Vol 7 (1) ◽  
pp. 55-70
Author(s):  
Moh. Zikky ◽  
M. Jainal Arifin ◽  
Kholid Fathoni ◽  
Agus Zainal Arifin
Keyword(s):  
Virtual Reality ◽  
High Performance ◽  
Large Scale ◽  
3D Models ◽  
A Algorithm ◽  
Virtual Reality Technology ◽  
Performance Technology ◽  
Outer Line ◽  
High Performance Computer ◽  
High Level

High-Performance Computer (HPC) is computer systems that are built to be able to solve computational loads. HPC can provide a high-performance technology and short the computing processes timing. This technology was often used in large-scale industries and several activities that require high-level computing, such as rendering virtual reality technology. In this research, we provide Tawaf’s Virtual Reality with 1000 of Pilgrims and realistic surroundings of Masjidil-Haram as the interactive and immersive simulation technology by imitating them with 3D models. Thus, the main purpose of this study is to calculate and to understand the processing time of its Virtual Reality with the implementation of tawaf activities using various platforms; such as computer and Android smartphone. The results showed that the outer-line or outer rotation of Kaa’bah mostly consumes minimum times although he must pass the longer distance than the closer one.  It happened because the agent with the closer area to Kaabah is facing the crowded peoples. It means an obstacle has the more impact than the distances in this case.

HMOS-CMOS-a low-power high-performance technology

1981 ◽  
Vol 16 (5) ◽  
pp. 454-459 ◽  
Author(s):  
K. Yu ◽  
R.J.C. Chwang ◽  
M.T. Bohr ◽  
P.A. Warkentin ◽  
S. Stern ◽  
...  
Keyword(s):  
Low Power ◽  
High Performance ◽  
Performance Technology

On Construction of Cluster and Grid Computing Platforms for Parallel Bioinformatics Applications

2012 ◽  
pp. 841-861
Author(s):  
Chao-Tung Yang ◽  
Wen-Chung Shih
Keyword(s):  
Grid Computing ◽  
High Performance Computing ◽  
High Speed ◽  
High Performance ◽  
Cluster Computing ◽  
Structural Features ◽  
Performance Technology ◽  
Data Intensive ◽  
Computing Platforms ◽  
Performance Computing

Biology databases are diverse and massive. As a result, researchers must compare each sequence with vast numbers of other sequences. Comparison, whether of structural features or protein sequences, is vital in bioinformatics. These activities require high-speed, high-performance computing power to search through and analyze large amounts of data and industrial-strength databases to perform a range of data-intensive computing functions. Grid computing and Cluster computing meet these requirements. Biological data exist in various web services that help biologists search for and extract useful information. The data formats produced are heterogeneous and powerful tools are needed to handle the complex and difficult task of integrating the data. This paper presents a review of the technologies and an approach to solve this problem using cluster and grid computing technologies. The authors implement an experimental distributed computing application for bioinformatics, consisting of basic high-performance computing environments (Grid and PC Cluster systems), multiple interfaces at user portals that provide useful graphical interfaces to enable biologists to benefit directly from the use of high-performance technology, and a translation tool for converting biology data into XML format.

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