Non-Orthogonal Multiple Access for mmWave Drones with Multi-Antenna Transmission

Unmanned aerial vehicles (UAVs) can be deployed as aerial base stations (BSs) for rapid establishment of communication networks during temporary events and after disasters. Since UAV-BSs are low power nodes, achieving high spectral and energy efficiency are of paramount importance. In this paper, we introduce non-orthogonal multiple access (NOMA) transmission for millimeter-wave (mmWave) drones serving as flying BSs at a large stadium potentially with several hundreds or thousands of mobile users. In particular, we make use of multi-antenna techniques specifically taking into consideration the physical constraints of the antenna array, to generate directional beams. Multiple users are then served within the same beam employing NOMA transmission. If the UAV beam can not cover entire region where users are distributed, we introduce beam scanning to maximize outage sum rates. The simulation results reveal that, with NOMA transmission the spectral efficiency of the UAV based communication can be greatly enhanced compared to orthogonal multiple access (OMA) transmission. Further, the analysis shows that there is an optimum transmit power value for NOMA beyond which outage sum rates do not improve further

Morphological Confirmation Of Probasidium For Laurobasidium Hachijoense Comb. Nov. Proposed By The Molecular Analysis

Basidia are evidently formed inside the galls not on the surface.L.hachijoense has probasidium and its basidium emerged from probasidium.No clamp was observe

An effective method in destination promotion

This study examined the visiting intentions of those who identify the value of a national park as a “Zest for Living” and those who identify it as a “Sense of familiarity with nature.” Even in the case of the same picture, visiting intentions varied with taste and values. Based on this finding, a suggestion was obtained for the effective promotion of destinations

Recovery of Destinations: An Examination Using the Tourism Area Life Cycle

In mature market, many destinations are sluggish growth. However, some destinations experience significant increases in visitors. This study examines the factors affecting the recovery and decline of destinations in Japan as an example of mature market. First, we analyze in term of the relation between destination and market (H0a), then, focus on destination itself (H0b/H0c). Using the framework of the tourism area life cycle (TALC), we found that destinations effectively respond to market trends and they can recover from stagnant growth. We also found that a change in the size and market share (in terms of individual or group visitors) of a destination is not relevant to the change in visitor’s number of the destination

アジア熱帯モンスーン地域の菌類の多様性とその生態的機能の調査研究

科学研究費助成事業（科学研究費補助金）研究成果報告書：基盤研究(A) 平成14～17年度 課題番号：1425500