The effects of channel fading of multitone interference on the performance of multiple hops per symbol fast frequencyhopped 0, Wary orthogonal frequency-shift keyed (MFSK) noncoherent systems are analytically investigated. The multiple equal-power interference tones are assumed to correspond to some of the possible IFFWM-ary orthogonal signaling tones. It is also assumed that channel fading cha...

This paper describes a hybrid network implementation that uses both ad hoc connectivity and access points. The network also allows mobile hosts that are multiple hops from an access point to use centralized services, like DHCP, which are not available in pure ad hoc networks. Many scenarios may benefit from this extension of services, such as mobile users near university buildings or at an airp...

Links in multi-hop wireless networks have an unpredictable behavior by nature, which directly affects the stability of routes. In this paper, we investigate some interesting questions related to the presence of both dominant and sub-dominant routes between nodes, in a real deployment. We focus on the persistence of the dominant route and the first four sub-dominant routes, to evaluate the stabi...

This work introduces decentralized query processing techniques based on MIDAS, a novel distributed multidimensional index. In particular, MIDAS implements a distributed k-d tree, where leaves correspond to peers, and internal nodes dictate message routing. MIDAS requires that peers maintain little network information, and features mechanisms that support fault tolerance and load balancing. The ...

Hops are used almost exclusively for bitterness and flavor by brewers. We propose the first analytical application of CZE coupled to ESI-MS for the separation and structural elucidation of organic compounds in the methanolic extracts of hops, and different extraction procedures of the plant material have been carried out. The proposed method permits the identification of hop polyphenols (flavon...

This article presents a dialogue system developed for the European project HOPS. Hops project focuses on facilitating the access to the information and services of local administrations using ontologies to represent knowledge. This representation allows managing the user interaction in textual and vocal mode in different languages. The dialogue controller uses ontologies both for managing user ...

Koorde1 is a new distributed hash table (DHT) based on Chord [15] and the de Bruijn graphs [2]. While inheriting the simplicity of Chord, Koorde meets various lower bounds, such as O(log n) hops per lookup request with only 2 neighbors per node (where n is the number of nodes in the DHT), and O(log n/ log log n) hops per lookup request with O(log n) neighbors per node.

Depression and anxiety disorders are the most common mental health problems associated with oxidative stress. Although famous for its anxiolytic effect, antidepressant effect of valerian-hops combination was not previously studied, also relationship between sedative stress markers is unclear. The current research has two objectives: (1) to compare escitalopram (2) evaluate sedative/anxiolytic e...

This article deals with the derivation and analysis of the statistical properties of the instantaneous channel capacity of N*Nakagami-m channels, which has been recently introduced as a suitable stochastic model for multihop fading channels. We have derived exact analytical expressions for the probability density function (PDF), cumulative distribution function (CDF), level-crossing rate (LCR),...

SNARE-dependent membrane fusion requires the disassembly of cis-SNARE complexes (formed by SNAREs anchored to one membrane) followed by the assembly of trans-SNARE complexes (SNAREs anchored to two apposed membranes). Although SNARE complex disassembly and assembly might be thought to be opposing reactions, the proteins promoting disassembly (Sec17p/Sec18p) and assembly (the HOPS complex) work ...