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In the aim of absorbing a polarized wave from a fixed wireless antenna efficiently, several orientation-controlled lossy magnetic/dielectric materials have been also studied.
FPD films have a large market size in the functional chemical industry and it has a great significance to study the method of technology acquisition. In this study, we conducted a comparative research on the technology acquisition method of equivalent products for each organization with or without raw materials of phase difference films. The result of this study indicated that no significant differences...
It is widely accepted that top management leadership and involvement is one of Six Sigma critical success factors. However, the distinction of roles between top management and upper managers are still vague specifically on innovation, as emerging competitive advantages issues. Based on an empirical study, Six Sigma development can be divided into four phases namely installation phase for management...
Developing countries are challenged with intense market competition and are yet to make significant stride in their business performance. Although Total Quality Management (TQM) and New Product Development (NPD) can play major role in this case, empirical research done in justifying TQM's applicability for NPD is limited. Hence, this research is dedicated to study the applicability, methodology, and...
This paper focuses on the work style in operation & maintenance (O&M) of information systems and discusses potential problems hard for involved parties themselves to find out. First, this study used ethnography to extract problems and critical factors common to O&M projects. Secondly, the author analyzed the work styles by comparing critical factors of contrasting projects. Then, the results...
The present study investigates relationships between claim structures of patent applications and market shares of analyzing and diagnostic devices in Japan. In consequence, average numbers of total independent claims of patent application filed by firms whose market shares are in the top positions in their respective markets are significantly greater than those of firms whose shares are 10% or smaller...
We are investigating the influences of heavy ion irradiation on the detectors for in-beam OpenPET by using the Heavy Ion Medical Accelerator in Chiba (HIMAC) at the National institute of Radiological Sciences (NIRS). "OpenPET" which consists of two detector rings separated axially is suitable for in-beam PET in heavy ion therapy due to the open space between the separated detector rings...
We have proposed a depth of interaction (DOI) PET detector named X'tal cube, in which a number of Multi-Pixel Photon Counters (MPPCs) are coupled on various positions of six surfaces of a segmented scintillation crystal block. There are no reflectors within the block, and the areas among MPPCs on the surface are covered with reflector. The MPPC is thin and light solid-state photo-detector so that...
Previously, we developed a 4-layer depth of interaction (DOI) detector. It is composed of four layers of a scintillation crystal array and a position sensitive photomultiplier tube (PS-PMT) and by removing some reflectors between the crystal elements in the array, we control scintillation light distribution on the PS-PMT so that the responses of all crystal elements are discriminated. We also proposed...
This paper presents a modified grid array antenna whose radiation elements are loops, which are designed to radiate a circularly polarized wave. The array antenna has a low profile, that is, the distance from the loops to the ground plane, H, is extremely small: H = 3.5 mm (= 0.08 wavelength at 7 GHz). Analysis reveals that a modified grid array composed of nine loops has a 2.3% frequency bandwidth...
As the diversification of the electromagnetic (EM) environment is spreading, it is essential to estimate the EM exposure in the mother's body and her fetus for pregnant women under various situations. This paper presents the development of the numerical model of a 7-month pregnant woman (composed of 56 organs, which includes inherent organs of pregnant woman) based on the high-resolution whole-body...
A strip-type grid array antenna is analyzed using the finite-difference time-domain method. The space between the grid array and the ground plane, designated as the rear space, is filled with a dielectric layer and an air layer (two-layer rear-space structure). A VSWR bandwidth of approximately 13% is obtained with a maximum directivity of approximately 18 dB. The grid array exhibits a narrow beam...
The numerical dosimetry of pregnant women is one of the most important issues in electromagnetic-field safety. We have recently developed a whole-body numerical female model of an adult Japanese (non-pregnant) average figure. Therefore, a new fetus model including inherent tissues of pregnant women was constructed based on abdominal MRI data of a 7-month pregnant woman. A whole-body pregnant woman...
The numerical dosimetry of pregnant women is one of the most important issues in electromagnetic-field safety. We have recently developed a whole-body numerical female model of an adult Japanese (non-pregnant) average figure. Therefore, a new fetus model including inherent tissues of pregnant women was constructed based on abdominal MRI data of a 7-month pregnant woman. A whole-body pregnant woman...
The numerical dosimetry of pregnant women is one of the most important issues in electromagnetic-field safety. We have recently developed a whole-body numerical female model of an adult Japanese (non-pregnant) average figure. Therefore, a new fetus model including inherent tissues of pregnant women was constructed based on abdominal MRI data of a 7-month pregnant woman. A whole-body pregnant woman...
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