In this study, the applicability of in situ surface modification by radical beam irradiation method to reduce threading dislocation density in InN was investigated. The dislocation behavior, crystallographic quality, electrical properties, and photoluminescence properties of InN grown with this method were studied. Transmission electron microscopy observation revealed that dislocation density in the InN layer reduced by a factor of 3 in certain regions and showed good agreement with the results from photoluminescence spectroscopy. If this technology is established, high-quality InN with low threading dislocation density can be achieved with a very simple and repeatable growth process.
This paper describes the development process for tension legs type Submerged Floating tunnels (SFT) in shallow water. SFT is a completely new type of tunnels, unlike anything ever seen before. SFTs have attacked attentions as a new access to solve the problems not adequately dealt with by conventional structures. But, there are still many unknown factors, as no such structures.Therefore, Hokkaido University, Hokkaido Development Bureau and the Society Submerged Floating Tunnel Technology Research have studied on SFT technology, such as, design methods, tunnel structure, mooring systems, foundations, its construction in this several years. So, we are able to develop the design and construction methods for tension legs type Submerged Floating tunnels in shallow water.
The Hokkaido development bureau is planning the access road for the offshore artificial island of Oinaoshi fishing port in Hokkaido Muroran City. The Society Submerged Floating Tunnel Technology Research have studied on the access road using Submerged Floating tunnel (SFT) technology. It is possible to design and to construct the access road for Oinaoshi. The extension of the underwater part of this SFT is about 300 m, the basic specifications are 2-lanes road for automobile and pavement. This paper describes the development process for fixed type SFT for automobile road in shallow water. The structure of this SFT is rectangular reinforced concrete hulls supported by steel piles. And each hulls have buoyancy. In case of the fixed structure in water , the wave force which acts on hulls must be evaluated right. In this development, it is evaluating right the wave force which acts on hulls using the technique that the irregularity and the non-linear-ness of the wave , too, can be evaluated.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.