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Blockchain provides a new approach for participants to maintain reliable databases in untrusted networks without centralized authorities. However, there are still many serious problems in real blockchain systems in IP network such as the lack of support for multicast and the hierarchies of status. In this paper, we design a bitcoin-like blockchain system named BlockNDN over Named Data Networking and...
Coupled application workflows composed of applications implemented using task-based models present new coupling and data exchange challenges, due to the asynchronous interaction and coupling behaviors between tasks of the component applications. In this paper, we present an adaptive data placement approach that addresses these challenges by dynamically adjusting to the asynchronous coupling patterns...
As applications target extreme scales, data staging and in-situ/in-transit data processing have been proposed to address the data challenges and improve scientific discovery. However, further research is necessary in order to understand how growing data sizes from data intensive simulations coupled with the limited DRAM capacity in High End Computing systems will impact the effectiveness of this approach...
Data staging and in-situ/in-transit data processing are emerging as attractive approaches for supporting extreme scale scientific workflows. These approaches improve end-to-end performance by enabling runtime data sharing between coupled simulations and data analytics components of the workflow. However, the complex and dynamic data exchange patterns exhibited by the workflows coupled with the varied...
Next generation in-situ/in-transit data processing has been proposed for addressing data challenges at extreme scales. However, further research is necessary in order to understand how growing data sizes from data intensive simulations coupled with limited DRAM capacity in High End Computing clusters will impact the effectiveness of this approach. In this work, we propose using deep memory levels...
As system scales and application complexity grow, managing and processing simulation data has become a significant challenge. While recent approaches based on data staging and in-situ/in-transit data processing are promising, dynamic data volumes and distributions,such as those occurring in AMR-based simulations, make the efficient use of these techniques challenging. In this paper we propose cross-layer...
Emerging scientific and engineering simulations running at scale on leadership-class High End Computing (HEC) environments are producing large volumes of data, which has to be transported and analyzed before any insights can result from these simulations. The complexity and cost (in terms of time and energy) associated with managing and analyzing this data have become significant challenges, and are...
With the onset of extreme-scale computing, I/O constraints make it increasingly difficult for scientists to save a sufficient amount of raw simulation data to persistent storage. One potential solution is to change the data analysis pipeline from a post-process centric to a concurrent approach based on either in-situ or in-transit processing. In this context computations are considered in-situ if...
Emerging scientific simulations on leadership class systems are generating huge amounts of data. However, the increasing gap between computation and disk I/O speeds makes traditional data analytics pipelines based on post-processing cost prohibitive and often infeasible. In this paper, we investigate an alternate approach that aims to bring the analytics closer to the data using data staging and the...
Multi-stakeholders' cooperation is crucial to the emergency management for water disaster(WDEM). In order to discuss the cooperation problem, the paper mainly includes following aspects: (1) the network of heterogeneous agents about WDEM was built and game relationships among heterogeneous agents were analyzed; (2) the influence of behavioral strategies — cooperation or noncooperation — were observed...
One kinds of agriculture machine is researched, it can be used to harvest corn stubble. The ‘Three-factor quadratic regression orthogonal rotary method’ was adopted to improve working performance of screening conveyor device in this machine, The influences of rotational speed, conveying angle and position of shaking wheel on the rate of removing soil and efficiency of removing soil were investigated...
Horseradish peroxidase (HRP) and phthalic diglycol diacrylate (PDDA) was successfully immobilized on anodic aluminum oxide (AAO) template modified glassy carbon (GC) electrode using electric field directed layer-by-layer assembly (EFDLA) synthesis. The materials were characterized by scanning electric microscopy (SEM), transmission electric microscopy (TEM), UV-vis spectroscopy (UV-vis) and electrochemical...
Carbon nanotubes have a high electrochemically accessible area of porous tubes, good electronic conductance and strong mechanical property. These properties essentially suggest that CNTs are attractive materials for the construction of nanoscaled biosensors. Ligand frameworks such as the Schiff base containing salen ligand, that can be sterically and electronically modified with ease, are very attractive...
The cuticle of insects is multilayered structure at micro- or nano-scale in vertical direction. This work investigated the mechanical properties of the cuticle of dung beetle Copris ochus Motschulsky using nanoindenter. It was shown that the nanomechanical properties of the cuticle were different for each layer of the cuticle and its normal nanoindentation was resulted from the composite effect of...
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