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This paper presents a study that evaluates the performance of multi-view human activity recognition with videos having degraded quality. For the activity recognition models, a support vector machine-based approach using spatiotemporal features and a deep learning-based approach using convolutional and recurrent layers are built. We investigate the recognition performance of the two models with respect...
A reverberation chamber (RC) had been used widely in the electromagnetic measurement area. An RC is designed to have a long reverberation time, generate a lot of mode, and good field uniformity within the chamber. The purpose of this paper is to describe the design process and measurement of the KRISS Reverberation Chamber 1 (KRC 1). KRC 1 with 4.5 m × 3.4 m × 2.8 m dimensions is simulated by FEKO...
Goal: The goal of this symposium is to identify ‘state-of-the-art’ strategies for the use of antipsychotic medications in the management of children and adolescents with major psychiatric disorders. Learning objectives: 1. Define pediatric populations for whom second-generation antipsychotics are indicated 2. Identify the role of second-generation antipsychotics in the management of major psychiatric...
This paper describes 2-D analysis of a frequency diverse transmit array antenna with a periodic modulated pattern in range using the finite difference time domain methods. The elements of applied linear array are equally spaced and have same phase but operated at different frequencies. The result pattern of frequency diverse array forms range-dependent beam patterns whereas conventional array pattern...
This paper describes the W-band fully polarimetric radiometer design and the measurement results of material's emissivity of rubber sheet and water as examples using developed radiometer. The measured brightness temperatures of sample materials depend on incident angle. For this angle dependent measurement, the test set-up was designed. Using the measured brightness temperature, the characteristics...
In wireless sensor networks, the positioning scheme using the received signal strength (RSS) has been widely considered due to its simplicity. Appropriate estimation of path-loss exponent (PLE) between a sensor node and an anchor node plays a key role in reducing position error in this RSS-based positioning. In the conventional researches, a sensor node directly uses the PLEs given by its neighboring...
In this paper, we have investigated the characteristics of road surfaces status depending on electromagnetic polarization in vertical and horizontal, respectively. The emissivity of road surface of V-, H-polarization shows the different brightness signal level in receiver and it can detect by the experiment the different road surface status like dry, wet or ice covered road. This technology can be...
In this paper, we developed and experimented of the W-band 1-D focal plane array (FPA) passive imaging radiometer which was called by Millimeter-wave Imaging Radiometer Equipment (MIRAE). This consists of quasi-optics including a dielectric aspheric lens and a metal mirror as a reflector, 30 channels FPA receiver based on the direct conversion type, scanner, image processor and displayer. To get 2-D...
0.1 THz Coupled Cavity Backward-wave Oscillator (CCBWO) is being developed utilizing two-step X-ray lithography. The characteristics of this 0.1 THz CCBWO are investigated through cold and hot tests.
As the problem of final joining quality and environmental pollutants such as lead and toxic gases, the ultrasonic welding system is used increasingly in the industrial workspace. The ultrasonic welder is composed of the inverter, L-C filter for the mechanical oscillation to piezoelectric, booster and horn for amplification of mechanical displacement. Also the resonant frequency is changing by design...
Load management program in Korea is classified into two classes. One is related with load management equipments, such as demand controller, remote control air-conditioner, and thermal storage systems et al. The other is related with incentive for load reduction by customer's willingness. Typical element for incentive is the determination of customer basehne(CBL) of customer load. It is the load forecasting...
Split waveguide array for high power applications in W-band is designed. The split waveguide array is composed of 4-way H-plane power divider, 4-way E-plane split waveguides, waveguide transition and 4times4 waveguide array. In order to design high power antenna with high gain and compact size in W-band, E-plane split waveguides and H-plane power divider are chosen. The designed high power split waveguide...
In this paper, we propose a new approach on DOA estimation under the number of signal sources is unknown. This can be applicable even to the case of fully correlated sources for which existing algorithms such as AIC and MDL are not workable. AIC and MDL are well-known ldquoinformation theoretic criterionrdquo algorithms for estimating the number of sources observed by a direction finding array. In...
This paper describes optimal disposition for land mobile direction finder using Longley-Rice propagation model which is predicting propagation losses for a deterministic propagation path whose 3-D terrain profile is specified. Its initial model is simulated and modified to minimize propagation error as a result of the field measurement. LOS and MTE algorithms are applied to choose candidate mountains...
This paper presents modulation classification method capable of classifying incident digital signals without a priori information using WT key features and SVM. These key features for modulation classification should have good properties of sensitive with modulation types and insensitive with SNR variation. In this paper, the 4 key features using WT coefficients, which have the property of insensitive...
A computational scheme were established for numerical simulations of amide I IR absorption, vibrational circular dichroism (VCD), and 2D IR photon echo spectra of different secondary structure peptides and the protein ubiquitin in solution. We compared these simulated spectra with experiments and found good agreements between theory and experiments.
A new adaptive fuzzy controller for uncertain strict-feedback nonlinear systems is proposed. All the previous approximator-based adaptive control algorithms for the strict-feedback nonlinear systems are based on backstepping scheme and guarantee semi-global closed-loop system stability. This paper proposes a new globally stabilizing adaptive fuzzy controller for strict-feedback nonlinear system without...
A wideband compressive receiver at V/UHF-band is presented. It uses the wideband and high time delay SAW DDL to improve the frequency resolution and scan rate. This type of the DDL has properties of the relative bandwidth of 20 %, the time delay of 49.9 usec, the insertion loss of 38.5 dB, and the time spurious rejection of 36 dB. The presented compressive receiver employs the multiply-convolve structure...
A direction finding system is of great importance for a variety of applications such as electronic support (ES), electronic intelligence (ELINT), communications, and also personal locating service. For the ES, accurate direction finding (DF) detection is required for measuring and analyzing the physical parameters of the RF signals in the dense signal environment. The main element of the DF system...
A wideband compressive receiver at V/UHF-band is presented. It uses the wideband and high time delay SAW DDL to improve the frequency resolution and scan rate. This type of the DDL has properties of the relative bandwidth of 20 %, the time delay of 49.9 usec, the insertion loss of 38.5 dB, and the time spurious rejection of 36 dB. The presented compressive receiver employs the multiply-convolve structure...
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