scholarly journals Light-weight remote communication for high-performance cloud networks

2012 ◽  
Author(s):  
Jens Kehne ◽  
Marius Hillenbrand ◽  
Jan Stoess ◽  
Frank Bellosa
Keyword(s):  
High Performance ◽  
Light Weight ◽  
Remote Communication ◽  
Cloud Networks

Fused Ambipolar Aza-isoindigos with NIR absorption

2021 ◽  
Author(s):  
Liping Yao ◽  
Danlei Zhu ◽  
Hailiang Liao ◽  
Sheik Haseena ◽  
Mahesh kumar Ravva ◽  
...  
Keyword(s):  
Organic Semiconductors ◽  
High Performance ◽  
Low Cost ◽  
Light Weight ◽  
The Past ◽  
Pi Conjugated ◽  
Nir Absorption ◽  
Conjugated Organic Semiconductors

Due to their advantages of low-cost, light-weight, and mechanical flexibility, much attention has been focused on pi-conjugated organic semiconductors. In the past decade, although many materials with high performance has...

Application of Combined Casting-Forging Process for Production of Durable Lightweight Aluminum Parts

2013 ◽  
Vol 554-557 ◽  
pp. 264-273 ◽  
Author(s):  
Stanislav Dedov ◽  
Gunter Lehmann ◽  
Rudolf Kawalla
Keyword(s):  
Heat Treatment ◽  
High Performance ◽  
High Strength ◽  
High Energy ◽  
Process Efficiency ◽  
Light Weight ◽  
Technological Chain ◽  
Process Chains ◽  
Coupled Process ◽  
Hardening Heat Treatment

Due to the constant development in the automotive industry, where high performance shared with the maximal comfort and safety at low car body weight are the primary goals, gains the lightweight construction in importance. Materials with light weight, high strength and toughness are being engaged. With this background the material aluminum and its alloys become highly attractive to manufacturers. There are mainly two ways of forming the metal materials: casting or forming. Apart from substitution of one method by another there are also many examples of combining of casting and forging processes in practice. Such approach allows using the advantages of both methods, shortening the process chains and saving energy and resources at the same time. Furthermore the form flexibility can be increased and the product quality can be improved. For higher process efficiency a direct transition from casting to forging operation should be applied, so that the heat loss decreases and no additional heat treatment between these operations is necessary. There are processes known, which allow producing the final parts by casting and forging from one a single heat. The application of such processes requires materials, which have simultaneously good casting and forging properties. The Institute of Metal forming TU Freiberg works intensively on development of combined casting-forging technologies for lightweight aluminum parts. A technological chain for this coupled process followed by precipitation hardening heat treatment was developed (Figure 1). Heat treatable aluminum cast and wrought alloys with 1 – 7 % silicon were applied. By the variation of silicon content the optimal cast, forging and hardening properties were achieved. This technology with high energy efficiency allows producing durable light weight parts from aluminum alloys while the mechanical properties of the final parts are equal to or even higher than those in the conventional processes.

Revisiting the design of LSM-tree Based OLTP storage engine with persistent memory

2021 ◽  
Vol 14 (10) ◽  
pp. 1872-1885
Author(s):  
Baoyue Yan ◽  
Xuntao Cheng ◽  
Bo Jiang ◽  
Shibin Chen ◽  
Canfang Shang ◽  
...  
Keyword(s):  
Recovery Time ◽  
High Performance ◽  
Transaction Processing ◽  
Light Weight ◽  
Global Index ◽  
Persistent Memory ◽  
Write Amplification ◽  
Database As A Service ◽  
Overall Evaluation ◽  
Memory Compaction

The recent byte-addressable and large-capacity commercialized persistent memory (PM) is promising to drive database as a service (DBaaS) into unchartered territories. This paper investigates how to leverage PMs to revisit the conventional LSM-tree based OLTP storage engines designed for DRAM-SSD hierarchy for DBaaS instances. Specifically we (1) propose a light-weight PM allocator named Hal-loc customized for LSM-tree, (2) build a high-performance Semi-persistent Memtable utilizing the persistent in-memory writes of PM, (3) design a concurrent commit algorithm named Reorder Ring to aschieve log-free transaction processing for OLTP workloads and (4) present a Global Index as the new globally sorted persistent level with non-blocking in-memory compaction. The design of Reorder Ring and Semi-persistent Memtable achieves fast writes without synchronized logging overheads and achieves near instant recovery time. Moreover, the design of Semi-persistent Memtable and Global Index with in-memory compaction enables the byte-addressable persistent levels in PM, which significantly reduces the read and write amplification as well as the background compaction overheads. The overall evaluation shows that the performance of our proposal over PM-SSD hierarchy outperforms the baseline by up to 3.8x in YCSB benchmark and by 2x in TPC-C benchmark.

Fabrication of pristine graphene-based conductive polystyrene composites towards high performance and light-weight

2018 ◽  
Vol 159 ◽  
pp. 232-239 ◽  
Author(s):  
Fangwei Zhao ◽  
Guangfa Zhang ◽  
Shuai Zhao ◽  
Jian Cui ◽  
Ailin Gao ◽  
...  
Keyword(s):  
High Performance ◽  
Pristine Graphene ◽  
Light Weight

Special Light Weight Aero Engine

1922 ◽  
Vol 26 (136) ◽  
pp. 137-148
Author(s):  
A. E. L. Chorlton
Keyword(s):  
Internal Combustion Engine ◽  
High Performance ◽  
Combustion Engine ◽  
High Heat ◽  
Light Weight ◽  
Aero Engine ◽  
Heat Value ◽  
Aero Engines ◽  
Aviation Engines ◽  
Direct Use

The high performance engine, whether military or commercial, is essentially the light one.The motor which made flying possible was an internal combustion engine, and the basic reason of its success was the direct use of an easily volatile fuel of high heat value, namely, petrol.The first engine developed to use this fuel was that of Daimler, and all motor-car, boat and aviation engines have sprung from this engine.In order to more readily have in mind our problem, we can with advantage briefly run through the main aero engines so far constructed with the progressive results of tests.The engine of Gottlieb Daimler is illustrated by Slide No. I. It had automatic inlet valves and exhaust governing, the latter being a point to be noted.The next slide shows the engine of the Wright Brothers. This engine weighed 8.75 lbs. per B.H.P. inclusive; the most successful engine of to-day weighs under 3 lbs. inclusive.

Fabrication of practical catalytic electrodes using insulating and eco-friendly substrates for overall water splitting

2020 ◽  
Vol 13 (1) ◽  
pp. 102-110 ◽  
Author(s):  
Weiju Hao ◽  
Renbing Wu ◽  
Hao Huang ◽  
Xin Ou ◽  
Lincai Wang ◽  
...  
Keyword(s):  
Water Splitting ◽  
High Performance ◽  
Low Cost ◽  
Light Weight ◽  
Overall Water Splitting ◽  
Insulating Substrates

A family of catalytic electrodes fabricated by insulating substrates of paper, cloth and sponge which bring dramatic advantages of high performance, low cost, light weight, eco-friendliness, flexibility, and simple fabrication, were developed.

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