54 research outputs found
Propelling breakthrough embedded microprocessors by means of integrated photonics
No full textThe tutorial aims to address electrical communications link limitations by developing chipscale, integrated photonic technology to enable seamless intrachip and off-chip photonic communications that provide the required bandwidth with low energy/bit. The emerging technology will exploit wavelength division multiplexing (WDM), allowing much higher bandwidth capacity per link, which is imperative to meeting the communication needs of future microprocessors. Such a capability would propel the microprocessor onto a new performance trajectory and impact the actual runtime performance of relevant computing tasks for power-starved embedded applications and supercomputing. The challenges in realizing optical interconnect technology are developing CMOS and DRAM-compatible photonic links that are spectrally broad, operate at high bit-rates with very low power dissipation, and are tightly integrated with electronic drivers. Ultimately, the goal of this tutorial is to demonstrate photonic technologies that can be integrated within embedded microprocessors and enable seamless, energy-efficient, high-capacity communications within and between the microprocessor and DRAM. It is envisioned that optical interconnect technology will be especially useful for those platforms where extreme performance coupled with low size, weight, and power is a necessity (e.g. UAVs, and satellites)
Resource Utilisation Analysis in WDM Backbone Networks
No full textCircuit-switched backbone networks are appealing especially due to their low switching cost. However, some of their links may be poorly utilised with respect to the available capacity. Grooming can be used to improve this utilisation: optically switched lightpaths are groomed in fibres using WDM, and flows are groomed in lightpaths using TDM. However, grooming require more transmission resources if lightpaths/flows are not following the shortest-path and take detours. It can thus be counterproductive.TCO
Cost Aware Design of Translucent WDM Transport Networks
No full textFully-transparent DWDM networks working at 10 Gb/s or more have limited reach. At these high rates, only translucent networks able to fully regenerate the signal when needed can be used to implement long haul transport networks. Since signal regeneration and regenerator placement can be done in many ways, an effective design procedure will target the overall cost minimization. In this paper, we propose three regenerator placement procedures. Two of them minimise the number of regeneration nodes, whereas the third method minimises the total number of regenerators. Moreover, we present an economic model aimed to evaluate and compare the overall cost of these procedures. We show how to choose the optimum regenerator placement method according to regeneration type and associated costs.TCO
Pseudo Random Numbers Generators available as Web Services
Get PDFSeries of Pseudo Random Numbers are often used as simulation input, and they strongly Influence the results. Thus, their usage and the usage of their generator need to be taken care of very well. Qualified generators are available on the web as source code or libraries. However, they require an additional middleware to adapt them to the running environments, and this can lead to misuses.TCO
Inactivation and transmission studies of the carnation viruses mosaic and streak
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Fire protection talk to be given by Block Managers
No full textAdvertisement for fire prevention talk at Heart Mountain incarceration camp and report on fire hazards and fire safety measures.The Japanese American Archival Collection documents the people, places, and daily life of Japanese Americans, primarily those who lived in the once thriving community of pre-war Florin in the Sacramento region, as well as the conditions in American incarceration camps during World War II. The approximately 7,000 original items include personal and official letters, photographs, diaries, arts and crafts, newsletters, textiles, camps artifacts, yearbooks and other publications
1 Energy Saving Perspectives of IP over Wavelength Division Multiplexing
Get PDFAbstract — The electrical consumption of the core global networks is becoming preoccupant. To reduce it, one may bet on technological advances improving the energetic profile of individual components. However, large energy savings can potentially already be achieved, by reviewing the organization of the core networks. In this paper, we sketch directions which can be followed to improve the network organization toward reduced energetic consumption. Index Terms—Energy efficient networking, multi-layer optimization, optical networks. I
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