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Co-workers are an important source of information in organizations. Consequently, information managers seek to facilitate the use of such human information sources. Although various studies about what influences the use of human i...
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Co-workers are an important source of information in organizations. Consequently, information managers seek to facilitate the use of such human information sources. Although various studies about what influences the use of human information sources in org
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A novel fiber Raman source (FRS) that can simultaneously achieve a high continuous wave (CW) output power and a flat and broad spectrum is demonstrated experimentally. A160 mW CW output is achieved by 1 W pump power with 44 nm spe...
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A novel fiber Raman source (FRS) that can simultaneously achieve a high continuous wave (CW) output power and a flat and broad spectrum is demonstrated experimentally. A160 mW CW output is achieved by 1 W pump power with 44 nm spectral bandwidth (flatness <±2 dB). The FRS features in flexible output wavelength, adjustable output spectrum profile and high CW output power. Its application as pump source for ultra-flat fiber Raman amplification is verified.
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We have developed the High temperature linear nozzle source (HT LNS). Scanning deposition method with HT LNS provides the solution which keeps high material efficiency of the low temperature linear source, while solving problems c...
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We have developed the High temperature linear nozzle source (HT LNS). Scanning deposition method with HT LNS provides the solution which keeps high material efficiency of the low temperature linear source, while solving problems concerning high temperature point array source.
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Information on suspended sediment and particulate P (PP) sources is an important requirement in many catchment-based diffuse source pollution studies, in order to assist with model validation and to provide information to support ...
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Information on suspended sediment and particulate P (PP) sources is an important requirement in many catchment-based diffuse source pollution studies, in order to assist with model validation and to provide information to support the development of effective sediment and phosphorus control strategies. Such information is, however, frequently unavailable or difficult to assemble. In the study reported, source fingerprinting procedures were successfully used to assemble this information for seven sub-catchments in the Hampshire Avon catchment and five sub-catchments in the Middle Herefordshire Wye catchment. The results provide important new information on the relative importance of the contributions from surface and channel/subsurface sources to the suspended sediment and PP fluxes from the catchments. In the Wye sub-catchments channel/subsurface sources contributed 40-55% of the overall suspended sediment flux and 21-43% of the PP flux from the catchments. Equivalent values for the Avon were 1-41% and 154%, respectively. Combination of the information on the relative importance of surface and channel/subsurface sources with measured suspended sediment fluxes has provided the first estimates of the specific fluxes of sediment and PP attributable to channel/subsurface sources for UK catchments. The former are as high as 15-20 t km(-2) year(-1) in some of the Wye sub-catchments, whereas the latter exceeded 0.1 kgP ha(-1) year(-1) in the same sub-catchments. The results emphasize the need to take account of potential contributions from channel/subsurface sources when using measured suspended sediment and PP flux data to validate predictions derived from models incorporating only surface contributions.
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In this paper, we would like to characterize nonradiating volume and surface (faulting) sources for the elastic waves in anisotropic inhomogeneous media. Each type of source can be decomposed into a radiating part and a nonradiati...
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In this paper, we would like to characterize nonradiating volume and surface (faulting) sources for the elastic waves in anisotropic inhomogeneous media. Each type of source can be decomposed into a radiating part and a nonradiating part. The radiating part can be uniquely determined by an explicit formula containing the near-field measurements. On the other hand, the nonradiating part does not induce scattered waves at a certain frequency. In other words, such nonradiating source cannot be detected by measuring the field at a single frequency in a region outside of the domain where the source is located.
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By applying the empirical Green''s function method, we first proved that the source spectra in the middle eastern area of North Tianshan follow the ω~(-2) Brune model, and then, on this basis, obtained the source spectra for 105 ...
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By applying the empirical Green''s function method, we first proved that the source spectra in the middle eastern area of North Tianshan follow the ω~(-2) Brune model, and then, on this basis, obtained the source spectra for 105 earthquakes of M_L 2.5 ～ 5.7 in the studied area upon removing the noise, instrument, propagation and site effects in the observational seismic S waveforms. Finally, we determined the source parameters such as the seismic moment, stress drop, source dimension, etc., based on the Brune model. The results show that there is a good linear correlation between scalar seismic moment, M_0, and M_L, which is Log_(10) M_0 = 1.10 M_L + 17.20; The source radii range between 100 ～ 1500m; the stress drop, 1 ～ 16MPa with a predominant range of 1 ～ 10MPa. The relationship of the seismic moment versus corner frequencies indicates that there may exist two source scaling, that is, when M_0 < 4 x 10~(21) dyne-cm (equal to an M_L4.0 event), stress drop is weakly dependent on M_0; whereas, when M_0 > 4 x 10~(21) dyne • cm, stress drop is independent of M_0.
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Background: Spatial filtering and source separation are valuable tools in the analysis of EEG data. However, despite the well-known spatial localisation of individual cognitive processes within the brain, the available methods for...
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Background: Spatial filtering and source separation are valuable tools in the analysis of EEG data. However, despite the well-known spatial localisation of individual cognitive processes within the brain, the available methods for source separation, such as the widely used blind source separation technique, do not take into account the spatial distributions and locations of sources. This can result in sub-optimal source identification.
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Localizing sources in physical systems represents a class of inverse problems with broad scientific and engineering applications. This paper is concerned with the development of a non-iterative source sensitivity approach for the ...
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Localizing sources in physical systems represents a class of inverse problems with broad scientific and engineering applications. This paper is concerned with the development of a non-iterative source sensitivity approach for the localization of sources in linear systems under steady-state. We show that our proposed approach can be applied to a broad class of physical problems, ranging from source localization in elastodynamics and acoustics to source detection in heat/mass transport problems. The source sensitivity field introduced in this paper represents the change of a cost functional caused by the appearance of an infinitesimal (or point) source in a given domain (or its boundary). In order to extract macroscopic inferences, we apply a threshold to the source sensitivity field in a way that parallels the application of the topological derivative concept in shape identification. We establish precise formulas for the source sensitivity field using a direct approach and a Lagrangian formulation. We show that computing the source sensitivity field entails just obtaining the solution of a single adjoint problem. Hence, the computational expense of obtaining the source sensitivity is of the same order as that of solving one forward problem. We illustrate the performance of the method through numerical examples drawn from the areas of elastodynamics, acoustics, and heat/mass transport. Our results show that our proposed approach could be used on its own as a source detection tool or to obtain initial guesses for more quantitative iterative gradient-based minimization strategies.
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Research into the effects of emotion on source memory (i.e., memory for certain contextual details of a stimulus, such as its location, color, or temporal context) has yielded inconsistent findings. Mather and her co-workers tried...
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Research into the effects of emotion on source memory (i.e., memory for certain contextual details of a stimulus, such as its location, color, or temporal context) has yielded inconsistent findings. Mather and her co-workers tried to account for such inconsistencies by pointing out the relevance of the characteristics of the feature examined. Specifically, they distinguished between intrinsic and extrinsic features ( Mather, 2007 ) and between goal-relevant and goal-irrelevant information ( Mather and Sutherland, 2011 ). In the current study, we investigated source memory for language, which is an intrinsic feature or words. Catalan-Spanish bilinguals were tested in three experiments involving a recognition task in which they were asked about the language of presentation (Catalan or Spanish) of emotional and neutral words. In Experiments 1 and 2, source memory for negative and neutral words was assessed. In Experiment 1 participants performed an intentional encoding task in which language was a goal-relevant feature. In Experiment 2, they did an incidental encoding task in which language was also goal-relevant. Experiment 3 replicated Experiment 2 but negative words were replaced by positive words. The results showed an impairment in source memory for the language of presentation of emotional words when the encoding task was incidental, but not when it was intentional. Such impairment was observed with both negative words and positive words. The results are discussed in relation to the proposals of Mather and co-workers and point to the relevance of modulating factors, such as the intentional/incidental nature of encoding.
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