We put forward the existence and stability of defect surface gap solitons at the interface between uniform media and an superlattice with self-defocusing nonlinearity. We reveal that the defect plays the significant r...
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We put forward the existence and stability of defect surface gap solitons at the interface between uniform media and an superlattice with self-defocusing nonlinearity. We reveal that the defect plays the significant role in controlling the region of solitons existing, Various solitons are found to be existed in different gaps for different defects. For positive defects, fundamental solitons can exist stably in the semi-infinite gap, and dipole solitons can exist stably in the first gap but they are unstable in the second gap. For zero or negative defects, fundamental and dipole solitons can exist stably in the first gap and the second gap, respectively. (C) 2014 Elsevier GmbH. All rights reserved.
The harmful effects of oil on various species of flora and fauna have been studied extensively;however, few studies have studied the effects of oil exposure on human health. The objective of this research was to colle...
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The harmful effects of oil on various species of flora and fauna have been studied extensively;however, few studies have studied the effects of oil exposure on human health. The objective of this research was to collect information on the acute health effects and serious psychological symptoms of the possible consequences of such exposure to crude oil. Some studies focused on the composition of different chemicals used in the extraction process, and wastes generated proved to be highly harmful to human health. Thus, studies have shown that individuals who live near oil fields or wells or who take part in activities of cleaning oil spills have presented health conditions, such as irritation to the skin, eyes, mucous membranes, kidney damage, liver, reproductive, among others. In Ecuador, this reality is not different from other countries, and some studies have shown increased diseases related with oil crude and oil spills, like skin irritation, throat, liver, lung, infertility, and abortions, and it has been linked to childhood leukemia. Other studies suggest a direct relationship between DNA damage because of oil resulting in a genetic instability of the main enzymes of cellular metabolism as well as a relationship with some cancers, such as leukemia. (C) 2017 Elsevier Ltd. All rights reserved.
The ability to judge an object's orientation with respect to gravitational vertical relies on an egocentric reference frame that is maintained using not only vestibular cues but also contextual cues provided in th...
The ability to judge an object's orientation with respect to gravitational vertical relies on an egocentric reference frame that is maintained using not only vestibular cues but also contextual cues provided in the visual scene. Although much is known about how static contextual cues are incorporated into the egocentric reference frame, it is also important to understand how changes in these cues affect perception, since we move about in a world that is itself dynamic. To explore these temporal factors, we used a variant of the rod-and-frame illusion, in which participants indicated the perceived orientation of a briefly flashed rod (5-msec duration) presented before or after the onset of a tilted frame. The frame was found to bias the perceived orientation of rods presented as much as 185 msec before frame onset. To explain this postdictive effect, we propose a differential latency model, where the latency of the orientation judgment is greater than the latency of the contextual cues' initial impact on the egocentric reference frame. In a subsequent test of this model, we decreased the luminance of the rod, which is known to increase visual afferent delays and slow decision processes. This further slowing of the orientation judgment caused the frame-induced bias to affect the perceived orientation of rods presented even further in advance of the frame. These findings indicate that the brain fails to compensate for a mismatch between the timing of orientation judgments and the incorporation of visual cues into the egocentric reference frame.
Theatrical improvisation (impro or improv) is a demanding form of live, collaborative performance. Improv is a humorous and playful artform built on an open-ended narrative structure which simultaneously celebrates ef...
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Drawing on research in the sociology of professions as a reference point, this study examines the practices and perceptions of professional accountants towards the requirements of IES7 on continuing professional devel...
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Drawing on research in the sociology of professions as a reference point, this study examines the practices and perceptions of professional accountants towards the requirements of IES7 on continuing professional development (CPD). Responses from 1310 accountants in the Asia Pacific region suggest while increasing globalisation has led to more unified standards of professionalism, the perceptions of these standards are not uniform across the region. While there is some consensus that the ongoing development of accounting as part of globalisation, significant differences were identified in perceptions towards CPD offerings between professional accountants in developed economies, compared with emerging economies. Differences in perceptions of CPD offerings were most prevalent in relation to satisfaction with requirements, experience, quality and the appropriateness of the level of CPD. The findings suggest that global uniform CPD offerings fail to meet the aspirations of accountants in emerging economies, highlighting the need for increasingly diverse forms of CPD activities.
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