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Caren P. Shin,Abby Hoffman,Wanyi Lee,Roger C. Kendrick,David M. Baker,Timothy C. Bonebrake 한국응용곤충학회 2018 Journal of Asia-Pacific Entomology Vol.21 No.4
Urban landscapes provide unique environments for a wide variety of plants and animals, but their suitability may be limited by anthropogenic impacts such as pollution. We examined the potential utility of lichen and lichen-feeding moths as biodindicators of air pollution in Hong Kong by comparing carbon (C) and nitrogen (N) stable isotope values in lichens, lichenivorous and non-lichenivorous moths (Lepidoptera: Erebidae) and a moth outgroup (Lepidoptera: Geometridae). Our results show that stable isotope values for C and N were similar for lichens and lichen feeding moths, while non-lichen feeding moths formed a distinct group. In addition, we found consistent δ 13 C and δ 15 N values across moth body parts, indicating that any portion of the specimen is suitable for isotopic fingerprinting. Our results highlight that lichen feeding moths may be useful for integrating signals of atmospheric nitrogen pollution and could therefore have utility in monitoring and quantifying air quality over time and space.
Stimuli-Induced Equilibrium Point: A Psychological Field Theory Application in Ramp Merging Systems
Kendrick Amezquita S.,Peter C. Y. Chen,Weihai Chen,Zheng Zhao 제어로봇시스템학회 2017 제어로봇시스템학회 국제학술대회 논문집 Vol.2017 No.10
Based on the psychological field theory, the stimuli-induced equilibrium point (SIEP) model is formulated to characterize the interaction of a driver between two vehicles (leader and follower) in a three-vehicle platooning configuration. Considering the intensity of the stimuli that act upon a driver between these vehicles, the point at which the stimuli resultant becomes zero (i.e. the equilibrium point) is obtained. Consequently, the location of such a point within the leader-follower gap changes continuously according to the speed of the middle vehicle and the current traffic scenario. This methodology enables the systematic computation of speed and position references for automatic ramp merging systems. Such stimuli-induced equilibrium point has shown to improve the performance of existing merging control schemes while increasing safety conditions by providing enough reaction time for drivers to avoid and eventual collision.
J. Kennedy,A. Markwitz,Z. Li, W. Gao,C. Kendrick,S.M. Durbin,R. Reeves 한국물리학회 2006 Current Applied Physics Vol.6 No.3
The electrical conductivity of ZnO lms deposited on Si by the RF sputtering technique were modied by low-energy hydrogen· 1016 to 1.0· 1017 ions cm. 2.High resolution quantitative hydrogen depth proles of the un-doped and doped samples were measured non-destructively with elasticrecoil detection analysis using a nely focussed 2.5 MeV4He+ ion beam impinging onto the samples at 20.surements were carried out on the lms by SEM, XRD and Hall probe measurements to explore the eects of hydrogen implantation. Itwas observed that the electrical conductivity is decreased by as much as an order of magnitude after hydrogen implantation. The lmsremained polycrystalline after implantation. The results suggest that reducing the n-type conductivity using low-energy hydrogen implan-tation without annealing may provide a pathway for passivating the donors for a possible subsequent formation of p-type acceptors byion implantation.