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MULTI-SENSOR DATA FUSION FOR FUTURE TELEMATICS APPLICATION
Seong-BaekKim,장병태,Seung-YongLee,Ji-HoonChoi,Kyung-HoChoi 한국우주과학회 2003 Journal of Astronomy and Space Sciences Vol.20 No.4
In this paper, we present multi-sensor data fusion for telematics application. Suc-cessful telematics can be realized through the integration of navigation and spatialinformation. The well-determined acquisition of vehicles position plays a vital rolein applicationservice. ThedevelopmentofGPS is used to providethe navigationdata,but the performance is limited in areas where poor satellite visibility environment ex-ists. Hence, multi-sensor fusion including IMU (Inertial Measurement Unit), GPS(Global Positioning System), and DMI (Distance Measurement Indicator) is requiredto provide the vehicles position to service provider and driver behind the wheel. Themulti-sensor fusion is implemented via algorithm based on Kalman ltering tech-nique. Navigation accuracy can be enhanced using this ltering approach. For theverication of fusion approach, land vehicle test was performed and the results werediscussed. Results showed that the horizontal position errors were suppressed around1 meter level accuracy under simulated non-GPS availability environment. Undernormal GPS environment, the horizontal position errors were under 40 cm in curvetrajectory and 27cm in linear trajectory, which are denitely depending on vehiculardynamics.
Five subtypes of muscarinic receptors are expressed in gastric smooth muscles of guinea pig
서인석,양동기,김현진,KyungWanMin,강동묵,김성준,김기환,KiHoPark,전주홍,Kyung-HoChoi,김인규 생화학분자생물학회 2003 Experimental and molecular medicine Vol.35 No.1
Muscarinic receptors play key roles in the control ever, specific physiological functions of each sub-type remain to be determined. In this study, the nonselective cation channel activated by carba-chol (ICCh) was examined in circular smooth mus-cle cels of the guinea pig gastric antrum using patch-clamp technique. 4-DAMP inhibited ICCh dose- dependently with IC50 of 1.10.1 nM (n = 6 ) . G T PγS- induced current, however, was not inhibited by 10 nM 4-DAMP. ICCh was not recorded in pertussis- gastric antrum. ICCh values in response to 10 M Ch at a holding potential of 60 mV were -3032 pA (n=4) and -153 pA (n = 6) in the control and PTX-treated cels, respectively (P< 0.01). Sensi-tivities to nanomolar 4-DAMP and PTX suggest the posible involvement of m4 subtype. Using se-quence information obtained from cloned guinea pig muscarinic receptor genes, it is posible to pig brain tissue. Single cel RT-PCR experiments showed that al five subtypes of muscarinic re-ceptor were present in circular smoth muscle cells of the guinea pig gastric antrum. Together with our previous results showing that Go protein is important for activation of ACh-activated NSC channels, our results suggest that ICCh might be activated by acetylcholine through m4 subtype as wel as m2 and m3 subtypes in guinea-pig sto-mach.