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Building and storing efficient maps is an essentialfeature for long-term autonomy of robots. Modern sensors (such as Kinect) tend to produce a lot of data. However, long-term autonomy requires us to store this information in a succinct manner. One way to reduce dimensionality of information is to attribute semantics. Most indoor objects are cuboidal in nature. We conjecture that cuboids are a suitable...
A well-conditioned coupled set of electric field integral equation (EFIE) and thin dielectric sheet (TDS) approximation surface integral equations for analyzing densely discretized composite structures with perfect electric conductor (PEC) and thin dielectric layer is proposed. Whereas TDS operator is well-posed, a EFIE operator is ill-posed when applied to densely discretized surfaces. This makes...
Finite periodic array is applied in real situation. But, generally, assumed that periodic structure is arranged infinitely, approximate electromagnetic characteristics can be obtained efficiently. Therefore, comparison and analysis of cylindrical infinite array and cylindrical finite array are required. In this paper, scattering characteristics of cylindrical infinite periodic array are obtained efficiently...
Many researches which calculate the scattering characteristic of cylinder frequency selective surface (FSS) have been made. But, most of papers don't provide the validation such as the comparison between the calculation and experimental results. In this paper, method of moment using both entire domain function of rectangular patch and cylindrical Floquet harmonics are studied for representing surface...
In this paper, the shielding effectiveness of reinforced concrete structures under electromagnetic pulse (EMP) illumination has been modeled and analyzed below 1 GHz regime. The reinforced concrete provides shielding effectiveness at particular frequencies by the concrete as well as the embedded reinforced conductive grid. The reinforced concrete structures are analyzed using commercial 3-dimensional...
In this paper, the shielding effectiveness of reinforced concrete structures under electromagnetic pulse (EMP) illumination has been modeled and analyzed below 1 GHz regime. The reinforced concrete provides shielding effectiveness at particular frequencies by the concrete as well as the embedded reinforced conductive grid. The reinforced concrete structures are analyzed using commercial 3-dimensional...
This paper proposes a simple design equation for A-sandwich radome design. Operating frequency and transmittance are input parameters for the design equation. For a given design specifications to achieve appropriate performance with A-sandwich radome, tedious calculations must be carried out to extract key material and structural parameters. This letter shows that when material constant and thickness...
In human-robot interaction, how to express robot's emotion to human is an important issue. In this paper, we have proposed the music as a medium expressing robot's emotion. Since emotions and the feelings from music are somewhat subjective, we have composed the music considering musical factors to reduce ambiguity. As an earlier work, we composed the music for happy, sad, fear, and dislike. We analyzed...
This paper introduces an emotion interaction system for a service robot. The purpose of emotion interaction systems in service robots is to make people feel that the robot is not a mere machine, but reliable living assistant in the home. The emotion interaction system is composed of the emotion recognition, generation, and expression systems. A user's emotion is recognized by multi-modality, such...
In this paper, we proposed and implemented a novel antenna cover mounted on a microstrip patch antenna for ultra-fast aircraft. A protective antenna cover prevents the alteration in the electrical characteristics of the antenna due to environmental conditions. The permittivity of the cover materials should be practically invariable at all operating frequencies. We evaluated the characteristics of...
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