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Effects of Light on Ultradian Rhythms in the Lateral Leaflets of Desmodium gyrans
( Mohammad Idrish Miah ),( Anders Johnsson ) 한국식물학회 2007 Journal of Plant Biology Vol.50 No.4
Rhythmic up-down movements were studied in the lateral leaflets of Desmodium gyrans (L.F.) DC. These were recorded with a video-computer system, whereby the digital video signals from a CCD camera were processed with special software. Under control conditions (24℃ and 0.1 nM cm-2 s-1 of stable, dim light), the average period of lateral leaflet movement was 3.5 min. In the presence of light stimuli (for 2 min), those leaflets always moved toward the light, regardless of where it was applied to any axial part of the pulvinus. The strongest effect was manifested by a reduced amplitude of movement and, thus, a shortened period, which could be up to ~43% less under moderate light intensity (5 nM cm-2 s-1). Oscillations regained their original regularity over ~10 cycles after the light stimulus was removed. In addition, these oscillations temporarily disappeared after long exposure (~10 min) under moderate light, or when the leaflets were quickly exposed to a higher intensity (~12 nM cm-2 s-1). Therefore, we have now demonstrated that light can affect physiological parameters that are involved in the control of oscillations.
3GPP LTE-Assisted Wi-Fi-Direct: Trial Implementation of Live D2D Technology
Alexander Pyattaev,Jiri Hosek,Kerstin Johnsson,Radko Krkos,Mikhail Gerasimenko,Aleksandr Ometov,Pavel Masek,Sergey Andreev,Jakub Sedy,Vit Novotny,Yevgeni Koucheryavy 한국전자통신연구원 2015 ETRI Journal Vol.37 No.5
This paper is a first-hand summary on our comprehensive live trial of cellular-assisted device-to-device (D2D) communications currently being ratified by the standards community for next-generation mobile broadband networks. In our test implementation, we employ a full-featured 3GPP LTE network deployment and augment it with all necessary support to provide real-time D2D connectivity over emerging Wi-Fi-Direct (WFD) technology. As a result, our LTE-assisted WFD D2D system enjoys the required flexibility while meeting the existing standards in every feasible detail. Further, this paper provides an account on the extensive measurement campaign conducted with our implementation. The resulting real-world measurements from this campaign quantify the numerical effects of D2D functionality on the resultant system performance. Consequently, they shed light on the general applicability of LTE-assisted WFD solutions and associated operational ranges.