The fairness of 802.11 wireless networks is hard to predict and control because of the randomness and complexity of the MAC contentions and dynamics. Moreover, asymmetric channel conditions such as those caused by capture and channel errors often lead to severe unfairness among stations. In this paper we propose a novel distributed scheduling algorithm that we call VLS, for “variable-length sch...

One dimensional graphene nanostructures are one of the most promising materials for next generation electronics. Here, chemical vapor depostion growth nanoribbons (GNRs) and nanospears (GNSs) on a copper surface is reported. The GNRs GNSs enabled by vapor–liquid–solid (VLS) mechanism guided on-surface propagation liquid Cu-Si catalyst particle. slow lateral fast VLS vertical give rise to spear ...

Although the various effects of strain on silicon are subject of intensive research since the 1950s the physical background of anomalous piezoresistive effects in Si nanowires (NWs) is still under debate. Recent investigations concur in that due to the high surface-to-volume ratio extrinsic surface related effects superimpose the intrinsic piezoresistive properties of nanostructures. To clarify...

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This study investigates the relationship between depth of academic vocabulary knowledge and success among Saudi English-as-a-foreign-language university students. Fifty fourth-year students majoring in English completed a test, Word Associates Test (WAT), based on Academic List (AWL). Then, students’ grade point averages (GPAs) were obtained as measure success. Furthermore, learning strategy (V...

Background: Substantial inter-observer variation has been documented in the recognition and description of specific sonographic features as well for ATA risk (ASR). This raises question if stratification proposed by guidelines is reproducible applicable nodules with indeterminate cytology. The aim study was to determine inter-reader agreement (IRR) among radiologists using 2015 ASR thyroid nodu...

Vulvar lichen sclerosus (VLS) belongs to the group of autoimmune, chronic inflammatory skin disorders and is most frequent in females after their 50s. This disease might lead vulvar scarring, sexual dysfunction neoplasm transformation. For that reason, treatment VLS still considered an important clinical issue from borderline gynaecology dermatology. Classical includes use corticosteroids, whic...