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Scale-invariant nonlinear optical effects in gases

A general scaling formalism for nonlinear light-matter interactions in gases is presented and experimentally verified. The formalism enables to conveniently extrapolate nonlinear phenomena, such as filamentation or high-order harmonic generation, to new laser parameters.

The acceptable noise level and the pure-tone audiogram

Purpose: The vast majority of previous studies suggest that there is no relationship between the acceptable noise level (ANL) and pure-tone hearing thresholds reported as the average pure-tone hearing thresholds (pure-tone average). This study aims to explore (a) the relationship between hearing thresholds at individual frequencies and the ANL and (b) a measure of the slope of the audiogram and AN

Design of low profile MIMO antennas for mobile handset using characteristic mode theory

Designing highly integrated and efficient MIMO antennas for mobile handset is challenging, especially for low frequency bands below 1 GHz. In this work, by analyzing and manipulating the characteristic modes of a mobile handset, we propose a low profile dual-band MIMO antenna with high integration ability. Both antennas cover a bandwidth of 100 MHz at the center frequency of 0.9 GHz. The isolation

Sphagnum farming in a eutrophic world : The importance of optimal nutrient stoichiometry

Large areas of peatlands have worldwide been drained to facilitate agriculture, which has adverse effects on the environment and the global climate. Agriculture on rewetted peatlands (paludiculture) provides a sustainable alternative to drainage-based agriculture. One form of paludiculture is the cultivation of Sphagnum moss, which can be used as a raw material for horticultural growing media. Und

Ecohydrological analysis of a groundwater influenced blanket bog : Occurrence of schoenus nigricans in roundstone bog, Connemara, Ireland

Inputs of salt spray to the blanket bogs, due to their proximity to the coast and the predominant westerly winds from the Atlantic Ocean. To test this hypothesis we carried out an ecohydrological field study at a large blanket bog in the western part of Connemara, Ireland. We described peat profiles in two transects and sampled pore water from peat at different depths. The water samples were analy

Machines as manifestations of global systems : Implications for a sociometabolic ontology of technology

Anthropologists have generally found it reasonable to understand the Industrial Revolution in Britain as a product of global historical processes including colonialism and the structure of world trade. The extent to which the industrialization of British textile production was contingent on global processes has been illuminated in detail by historians such as Joseph Inikori. Andre Gunder Frank pro