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萤火虫(鞘翅目:萤科)两性交流中的闪光信号

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生态学报 2005年第6期25卷 1439-1444页

作者：付新华王俊刚 ohba nobuyoshi 雷朝亮华中农业大学昆虫资源研究所武汉430070 Yokosuka City Museum

对国内外萤火虫两性交流闪光信号的研究进行了综述,萤火虫发光器因种而异,多数发出黄绿色萤光,闪光信号的频率、光谱、强度及其时空分布的闪光模式包含着两性交流信息。萤火虫闪光交流系统有两种分类方法,其一是萤火虫具两个类型的闪光... 详细信息

对国内外萤火虫两性交流闪光信号的研究进行了综述,萤火虫发光器因种而异,多数发出黄绿色萤光,闪光信号的频率、光谱、强度及其时空分布的闪光模式包含着两性交流信息。萤火虫闪光交流系统有两种分类方法,其一是萤火虫具两个类型的闪光信号交流系统,及系统和系统,前者多在旧大陆,后者多在新大陆;其二是萤火虫具6个类型闪光信号交流系统,即HP,LL,LC,PR,CR和LB型,其中PR型与系统相对应,HP型与系统对应。萤火虫两性交流闪光信号常因时间和空间上的差异及外界物体的干扰使两性闪光交流的效率受到影响。萤火虫两性交流的闪光信号起源于鞘翅目的幼虫阶段,并起警戒天敌的作用,经过两性选择成为成虫两性交流的一种途径,进而成为新大陆的一些萤火虫间捕食猎物和逃避天敌的生存策略。

关键词：萤火虫两性交流闪光信号闪光交流系统进化

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条背萤的闪光求偶行为

昆虫学报 2005年第2期48卷 227-231页

作者：付新华 ohba nobuyoshi 王余勇雷朝亮华中农业大学植物科技学院昆虫资源研究所武汉430070 Yokosuka City Museum Yokosuka238Japan

水栖萤火虫条背萤Luciola substriata(Gorh.)发出单脉冲周期性特异闪光信号进行求偶.室外观测发现,在23 ℃、86%RH时,雄萤飞行求偶闪光信号脉冲闪光持续时间为0.52 s,间隔时间为0.28 s,闪光信号的最大亮度为0.6 lx;雌萤求偶信号周期为0.... 详细信息

水栖萤火虫条背萤Luciola substriata(Gorh.)发出单脉冲周期性特异闪光信号进行求偶.室外观测发现,在23 ℃、86%RH时,雄萤飞行求偶闪光信号脉冲闪光持续时间为0.52 s,间隔时间为0.28 s,闪光信号的最大亮度为0.6 lx;雌萤求偶信号周期为0.67 s,最大亮度为0.4 lx.雄萤发出求偶信号0.22 s后,雌萤发出两个连续的回应信号.第一个回应信号为0.49 s,第二个为0.41 s,两个回应信号的间隔时间为0.11 s.雄萤发现雌萤回应信号后,降落至离雌萤5～10 cm处,继续发出闪光信号,但闪光脉冲频率减小,闪光脉冲时间为1.23 s,间隔时间为0.50 s.条背萤交配时呈'V'或'一'字形交配姿势.

关键词：条背萤水栖萤火虫求偶行为生物发光两性闪光通讯交流

A regression model-based method for indoor positioning with compound location fingerprints

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Geo-Spatial Information Science 2019年第2期22卷 107-113,I0003页

作者： Tomofumi Takayama Takeshi Umezawa nobuyoshi Komuro Noritaka Osawa Hewlett-Packard Japan LtdTokyoJapan Graduate School of Engineering Chiba UniversityChibaJapan

This paper proposed and evaluated an estimation method for indoor *** method combines location fingerprinting and dead reckoning differently from the conventional *** uses compound location fingerprints,which are composed of radio fingerprints at multiple points of time,that is,at multiple positions,and displacements between them estimated by dead *** avoid errors accumulated from dead reckoning,the method uses short-range dead *** method was evaluated using 16 Bluetooth beacons installed in a student room with the dimensions of 11×5 m with furniture *** Received Signal Strength Indicator(RSSI)values of the beacons were collected at 30 measuring points,which were points at the intersections on a 1×1 m grid with no obstacles.A compound location fingerprint is composed of RSSI vectors at two points and a displacement vector between *** Forests(RF)was used to build regression models to estimate positions from location *** root mean square error of position estimation was 0.87 m using 16 Bluetooth *** error is lower than that received with a single-point baseline model,where a feature vector is composed of only RSSI values at one *** results suggest that the proposed method is effective for indoor positioning.

关键词： Indoor positioning integrated estimation radio fingerprinting dead reckoning machine learning non-linear regression

Improved performance of direct methanol fuel cells with the porous catalyst layer using highly-active nanofiber catalyst

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Carbon Resources Conversion 2018年第1期1卷 61-72页

作者： Yosuke Tsukagoshi Hirokazu Ishitobi nobuyoshi Nakagawa Department of Environmental Engineering Science Graduate School of Science and TechnologyGunma University1-5-1TenjinchoKiryuGunma 376-8515Japan Division of Environmental Engineering Science Gunma University1-5-1TenjinchoKiryuGunma 376-8515Japan

PtRu supported on TiO2-embedded carbon nanofibers(PtRu/TECNF),which was recently reported as a highly-active catalyst for methanol oxidation,was applied to a direct methanol fuel cell(DMFC),and the power generation performance was compared to that using the commercial PtRu/*** the comparison,the effect of the catalyst loading on the power density of the DMFC was investigated using PtRu(18 wt%)/*** DMFC power density showed a maximum at about a 1.5 mg cm2 PtRu loading that corresponds to about an 80 mm layer thickness.A catalyst layer thicker than this value reduced the power density probably due to the concentration *** PtRu content in the PtRu/TECNF was then increased to 30 wt%or more to reduce the layer thickness and to increase the power *** DMFC performance was compared to that of different anode catalysts at a 1 mg cm2 PtRu *** power density was maximized using the PtRu30 wt%/TECNF,which showed a 173 mW cm2 at 353 K and had 66 mm layer thick,that was 26%higher than that of commercial PtRu/*** current–voltage curve of the DMFC with the PtRu/TECNF suggested an improved mass transport overvoltage,but a little improvement in the activation one despite using the catalyst with about a 2 times higher activity compared to that of the commercial PtRu/*** was attributed to the lower Pt utilization of the nanofiber catalyst layer.

关键词： Direct methanol fuel cell Catalyst layer structure PtRu catalyst TiO2-embedded carbon nanofiber support Methanol oxidation reaction Power density Precious metal loading Concentration overvoltage

Improvement of registration accuracy of a handheld augmented reality system for urban landscape simulation

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Frontiers of Architectural Research 2014年第4期3卷 386-397页

作者： Tomohiro Fukuda Tian Zhang nobuyoshi Yabuki Graduate School of Engineering Osaka University Suita Osaka 565-0871 Japan Nikken Space Design Ltd. Bunkyo-ku Tokyo Japan

The need for visual landscape assessment in large-scale projects for the evaluation of the effects of a particular project on the surrounding landscape has grown in recent years. Augmented reality （AR） has been considered for use as a landscape simulation system in which a landscape assessment object created by 3D models is included in the present surroundings. With the use of this system, the time and the cost needed to perform a 3DCG modeling of present surroundings, which is a major issue in virtual reality, are drastically reduced. This research presents the development of a 3D maporiented handheld AR system that achieves geometric consistency using a 3D map to obtain position data instead of GPS, which has tow position information accuracy, particularly in urban areas. The new system also features a gyroscope sensor to obtain posture data and a video camera to capture live video of the present surroundings. All these components are mounted in a smartphone and can be used for urban landscape assessment. Registration accuracy is evaluated to simulate an urban landscape from a short- to a long-range scale. The latter involves a distance of approximately 2000 m. The developed AR system enables users to simulate a Landscape from multiple and longdistance viewpoints simultaneously and to walk around the viewpoint fields using only a smartphone. This result is the tolerance level of Landscape assessment. In conclusion, the proposed method is evaluated as feasible and effective.

关键词： Landscape simulation Augmented reality Handheld device Registration accuracy Assessment

Control of Snow Falling Flow around NACA0015 Blade using a Plasma Electrode with Weather Resistant Design

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Journal of Thermal Science 2022年第1期31卷 72-81页

作者： MATSUDA Hisashi CHIBA Takahiro YAGAMI Masaki TAJIMA Yusuke WATANABE nobuyoshi SATO Hideaki TAKEYAMA Masafumi Hokkaido University of Science Hokkaido 006-8585Japan Asahi Rubber Inc. Saitama 330-0801Japan

The plasma actuation (PA) effect on the snow falling flow was investigated using a plasma electrode with weather resistant design and the natural snow wind facility of the Hokkaido University of Science. NACA0015 test blade with chord length c of 300 mm was used. Wind tunnel tests were carried out under the angle of the attack of the blade was fixed at 15 degrees, and the main flow velocity is U=5 m/s. PIV (Particle image velocimetry) measurements were conducted on various PA conditions using natural dry snowflakes as a tracer. When the actuator was driven under the condition of the fundamental frequency of F=50 kHz, and the pulsed modulated frequency f of fc/U=1 and Duty ratio (Ratio of plasma ON time to pulse duration time) =1%, movement of snowflakes was controlled the most effectively tested. It was clarified that the fundamental frequency of PA also affects the control of snow flow. Under snowfall conditions, the weather resistant designed plasma electrode has suffered no damage and operated successfully.

关键词： plasma actuator weather resistant design snow falling flow control experiment PIV

Increased utilization and mass activity of PtRu on reduced graphene oxide by heat treatment of its aerogel followed by composite with nanomaterials

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Carbon Resources Conversion 2023年第3期6卷 205-214页

作者： Kenta Dejima Hirokazu Ishitobi He Gao Mai Saito nobuyoshi Nakagawa Graduate School of Science and Technology Gunma University1-5-1Tenjin-choKiryuGunma 376-8515Japan Division of Environmental Engineering Science Gunma University1-5-1Tenjin-choKiryuGunma 376-8515Japan Faculty of Science and Technology Gunma University1-5-1Tenjin-choKiryuGunma 376-8515Japan

The method to increase PtRu utilization and its catalytic activity of PtRu nanoparticles supported on reduced graphene oxide(RGO)by avoiding its restacking was proposed with the aim of developing an active catalyst for a direct methanol fuel *** heat treatment at 200◦C of the GO aerogel(GOA)prepared by freeze drying of GO ice was introduced to weaken the attractive force of the hydrogen bonding between the GO sheets followed by the composite with the nanoparticles,i.e.,ketjenblack(KB),TiO_(2)and Ti_(4)O_(7),at different weight *** catalyst supported on the heat-treated GOA(RGOA),PtRu/RGOA,improved the PtRu utilization to some extent and also increased the ECSA and mass activity compared to that of PtRu/*** had fewer oxygen functional groups,especially the epoxy *** to the treatment and composite,the PtRu utilization was increased from 66.5%for PtRu/RGO to 128.6%for PtRu/RGOA+Ti_(4)O_(7)(4:1)and the mass activity was improved from 50.7 A/g-PtRu for PtRu/RGO to 130.5 A/g-PtRu for PtRu/RGOA+Ti_(4)O_(7)(1:1).The Ti_(4)O_(7)nanoparticles showed the best catalytic performance for the composite suggesting that the strong interaction between Ti_(4)O_(7)and the Pt nanoparticles was effective due to its high electronic conductivity.

关键词： Reduced graphene oxide Restacking Catalyst utilization Mass activity Composite catalyst Methanol oxidation Ti4O7

Differences in spatial understanding between physical and virtual models

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Frontiers of Architectural Research 2014年第1期3卷 28-35页

作者： Lei Sun Tomohiro Fukuda Toshiki Tokuhara nobuyoshi Yabuki Graduate School of Engineering Osaka University Osaka 565-0871 Japan

In the digital age, physical models are still used as major tools in architectural and urban design processes. The reason why designers still use physical models remains unclear. In addition, physical and 3D virtual models have yet to be differentiated. The answers to these questions are too complex to account for in all aspects. Thus, this study only focuses on the differences in spatial understanding between physical and virtual models. In particular, it emphasizes on the perception of scale. For our experiment, respondents were shown a physical model and a virtual model consecutively. A questionnaire was then used to ask the respondents to evaluate these models objectively and to establish which model was more accurate in conveying object size. Compared with the virtual model, the physical model tended to enable cluicker and more accurate comDarisons of building heights.

关键词： Spatialunderstanding Scale perception Physical model Virtual model Virtual reality

Development of massively parallel electron beam direct write lithography using active-matrix nanocrystalline-silicon electron emitter arrays

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Microsystems & Nanoengineering 2015年第1期1卷 44-51页

作者： Masayoshi Esashi Akira Kojima Naokatsu Ikegami Hiroshi Miyaguchi nobuyoshi Koshida World Premier International Research Center Advanced Institute for Materials Research(WPI-AIMR) Tohoku University519-1176 Aramaki-Aza-AobaAoba-kuSendaiMiyagi 980-0845Japan Micro System Integration Center Tohoku University519-1176 Aramaki-Aza-AobaAoba-kuSendaiMiyagi 980-0845Japan Department of Electrical and Electronic Engineering Tokyo University of Agriculture&Technology2-24-16 Naka-choKoganei-shiTokyo 184-8588Japan

Nanoscale lithographic technologies have been intensively studied for the development of the next generation of semiconductor manufacturing *** mask-less/direct-write electron beam(EB)lithography methods serve as a candidate for the upcoming 10-nm node approaches and beyond,it remains difficult to achieve an appropriate level of *** innovative features of the multiple EB system that involve the use of a thermionic source have been ***,a blanking array mechanism is required for the individual control of multiple beamlets whereby each beamlet is deflected onto a blanking object or passed through an *** paper reviews the recent developments of our application studies on the development of a high-speed massively parallel electron beam direct write(MPEBDW)*** emitter array used in our study includes nanocrystalline-Si(nc-Si)ballistic electron *** are drifted via multiple tunnelling cascade transport and are emitted as hot *** transport mechanism allows one to quickly turn electron beamlets on or *** emitter array is a micro-electro-mechanical system(MEMS)that is hetero-integrated with a separately fabricated active-matrix-driving complementary metal-oxide semiconductor(CMOS)large-scale integration(LSI)system that controls each emitter *** basic function of the LSI was confirmed to receive external writing bitmap data and generate driving signals for turning beamlets on or *** emitted beamlet(10×10μm^(2))is converged to 10×10 nm^(2) on a target via the reduction electron optic system under *** paper presents an overview of the system and characteristic evaluations of the nc-Si emitter *** examine beamlets and their electron emission characteristics via a 1:1 exposure test.

关键词： direct write lithography electron beam lithography electron emitter array multiple electron beams nanocrystalline Si