527 research outputs found

    Doped ZnO nanoparticles in biomedicine: their role as stimuli-responsive anticancer agents

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    STRATEGIES FOR LOOP PREVENTION FORWARDING LOGIC IN HYBRID INFORMATION CENTRIC NETWORKING

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    Techniques are described herein that provide a forwarding strategy applicable to Information Centric Networking (ICN) networks and hybrid ICN (hICN) networks. In such networks, Interest requests are likely to be hair-pinned back to a Forwarder that is serving a dynamic cache system. When the dynamic cache system has no representation of the named data object, the Forwarder must recycle the Interest request back into the network. However, the Forwarding logic must avoid hair-pinning the Interest back to the same unpopulated cache

    FAST EDGE ACCESS CONTROL FOR ROUTED TRAFFIC

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    Real-Time Communication (RTC) traffic typically leverages one or more media bridges (often located in the cloud) and, in order to reduce latency and/or offload cloud resources to the edge, one or more real-time edge relays can be utilized in order to optimize such traffic. Presented herein are techniques to secure a media edge relay node without requiring an authentication for a connection involving the media edge relay node

    Direct Arylation of Thiophenes in Continuous Flow

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    Synthetic methodologies involving direct C-H functionalization are promising to improve sustainability in organic synthesis. However, these newly developed strategies may have a scarce appeal for larger scale applications due to the high catalyst loading, harsh conditions or their typically long reaction times that affect severely the process productivity. Flow chemistry technology is a recognized tool to improve both the efficiency and scalability in organic synthesis that can overcome these issues. In the present paper we studied an "in flow" method for the direct arylation of thiophene derivatives with aromatic bromides to promptly afford heteroaromatic biaryls, which are recurrent motifs both in biologically active molecules and in functional materials. By using a packed-bed reactor containing potassium carbonate as the solid base and an automated system, we could develop a reliable methodology for thiophene arylation in flow with yields up to 90 % within a residence time of 30-60 minutes. This strategy is suitable for a wide variety of substrates and allowed the reaction to be carried out at gram-scale reaching a productivity value of 1.1 g h(-1)

    pp-adic valuation of harmonic sums and their connections with Wolstenholme primes

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    We explore a conjecture posed by Eswarathasan and Levine on the distribution of pp-adic valuations of harmonic numbers H(n)=1+1/2+⋯+1/nH(n)=1+1/2+\cdots+1/n that states that the set JpJ_p of the positive integers nn such that pp divides the numerator of H(n)H(n) is finite. We proved two results, using a modular-arithmetic approach, one for non-Wolstenholme primes and the other for Wolstenholme primes, on an anomalous asymptotic behaviour of the pp-adic valuation of H(pmn)H(p^mn) when the pp-adic valuation of H(n)H(n) equals exactly 3

    TECHNIQUES TO PROVIDE EDGE RELAYS WITH PRIVACY-PRESERVING CACHES

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    Real-Time Communication (RTC) traffic typically leverages one or more media bridges (often located in the cloud) and, in order to reduce latency and/or offload cloud resources to the edge, one or more real-time edge relays can be utilized in order to optimize such traffic. However, edge relays may also be exploited by malicious entities and, thus, certain protective mechanisms are typically utilized at edge relays that, while reducing the probability of being exploited, can reduce the throughput of such edge relays. Techniques presented herein may help to preserve data privacy at edge relays through the use of a time-local caching mechanism
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