Highly Scalable Neuromorphic Hardware with 1-bit Stochastic nano-Synapses

Thermodynamic-driven filament formation in redox-based resistive memory and the impact of thermal fluctuations on switching probability of emerging magnetic switches are probabilistic phenomena in nature, and thus, processes of binary switching in these nonvolatile memories are stochastic and vary from switching cycle-to-switching cycle, in the same device, and from device-to-device, hence, they provide a rich in-situ spatiotemporal stochastic characteristic. This work presents a highly scalable neuromorphic hardware based on crossbar array of 1-bit resistive crosspoints as distributed stochastic synapses. The network shows a robust performance in emulating selectivity of synaptic potentials in neurons of primary visual cortex to the orientation of a visual image. The proposed model could be configured to accept a wide range of nanodevices.Comment: 9 pages, 6 figure

A Passage from Brooklyn to Ithaca: The Sea, the City and the Body in the Poetics of Walt Whitman and C. P. Cavafy

This treatise is the first extensive comparative study of Walt Whitman and C. P. Cavafy. Despite the abundant scholarship dealing with the work and life of each, until now no critic has put the two poets together. Whitman’s poetry celebrates birth, youth, the self and the world as seen for the first time, while Cavafy’s diverts from the active present to resurrect a world whose key, in Eliot’s terms, is memory. Yet, I see the two poets conversing in the crossroads of the fin de siècle; the American Whitman and the Greek Cavafy embody the antithesis of hope and dislocation to such a degree that a comparative examination of their poetics reveals two minds, and two narratives, closer than their continents. The textual approach of my subject includes the examination of poetry, prose writings, and autobiographical documentation, as well as biographical testimony. The thematic approach is organized around three key subjects that I see as integral and consistent in the poetics of Whitman and Cavafy: the sea, the city and the body

SCADA and related technologies

Presented at SCADA and related technologies for irrigation district modernization: a USCID water management conference on October 26-29, 2005 in Vancouver, Washington.The Zigbee™ alliance seeks to develop an open standard for reliable, cost-effective, secure wireless interconnectivity of monitoring and control products. The ZigBee™ technology is better suited for control applications, which do not require high data rates, but must have low power, low costs and ease of use. In this paper we investigate the applicability of Zigbee™ to Supervisory Control and Data Acquisition (SCADA) systems an investigate issues relating to: Networking, Security, Reliability and Quality of Service

Measuring CDNs susceptible to Domain Fronting

Domain fronting is a network communication technique that involves leveraging (or abusing) content delivery networks (CDNs) to disguise the final destination of network packets by presenting them as if they were intended for a different domain than their actual endpoint. This technique can be used for both benign and malicious purposes, such as circumventing censorship or hiding malware-related communications from network security systems. Since domain fronting has been known for a few years, some popular CDN providers have implemented traffic filtering approaches to curb its use at their CDN infrastructure. However, it remains unclear to what extent domain fronting has been mitigated. To better understand whether domain fronting can still be effectively used, we propose a systematic approach to discover CDNs that are still prone to domain fronting. To this end, we leverage passive and active DNS traffic analysis to pinpoint domain names served by CDNs and build an automated tool that can be used to discover CDNs that allow domain fronting in their infrastructure. Our results reveal that domain fronting is feasible in 22 out of 30 CDNs that we tested, including some major CDN providers like Akamai and Fastly. This indicates that domain fronting remains widely available and can be easily abused for malicious purposes

Free-space optics for high speed reconfigurable card-to-card optical interconnects

High-speed card-to-card optical interconnects are highly demanded in high-performance computing and data centers. Compared with other solutions, free-space optical interconnects have the capability of providing both reconfigurability and flexibility. In this paper we propose and experimentally demonstrate a free-space based reconfigurable optical interconnect architecture and it is capable of connecting cards located both inside the same rack as well as in different racks. Results show that 3xiO Gb/s data transmission is achieved with a worst-case receiver sensitivity better than -9.38 dBm