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Development of Monorail-type Mobile Robot for Field Environment and Plant Status Monitoring
( Takashi Okayasu ),( Daisaku Arita ),( Takashi Yoshinaga ),( Rin-ichiro Taniguchi Eiji Inoue ),( Yasumar Hirai ),( Muneshi Mitsuoka ) 한국농업기계학회 2018 한국농업기계학회 학술발표논문집 Vol.23 No.1
Field environmental and plant growth status monitoring is very important task to establish smart agriculture. Field monitoring device is usually installed only into the representative location in the field because of the management cost and complexity. Thus, their spatial distribution and time variation are not well grasped in actual cultivation. On the other hand, comprehensive analysis on the spatiotemporal field environmental and plant growth information is required in phenotyping researches. Various high-throughput plant phenotyping systems have been studied well and developed mainly in Europe and the US countries up to present. However, their systems are very expensive. Development of the low-price system is also required to create new cultivar and advanced agricultural production system. In this study, a monorail-type mobile robot for collecting field environment and plant status information was developed by using affordable devices such as a card-size microcomputer, sensors, and camera. Many of the robot frames were printed by 3D printer. The robot is driven by using two servo motors. The performance was verified by several conditions and then the spatiotemporal data measured was also evaluated.
ERRATUM : 'LYMANα EMITTERS BEYOND REDSHIFT 5: THE DAWN OF GALAXY FORMATION' (JKAS, 36, 123, [2003])
Taniguchi, Yoshiaki,Shioya, Yasuhiro,Ajiki, Masaru,Fujita, Shinobu S.,Nagao, Tohru,Murayama, Takashi The Korean Astronomical Society 2003 Journal of The Korean Astronomical Society Vol.36 No.4
The first sentence in the second paragraph of INTRODUCTION, 'The first discovery of a galaxy beyond z=5 was reported by Weymann et al. (1998); HDF 4-470.3 at z=5.60.' should be read as 'The first discovery of a galaxy beyond z=5 was reported by Dey et al. (1998); 0140+326 RD1 at z=5.34'. The authors sincerely regret this error.
LYMANα EMITTERS BEYOND REDSHIFT 5: THE DAWN OF GALAXY FORMATION
TANIGUCHI YOSHIAKI,SHIOYA YASUHIRO,AJIKI MASARU,FUJITA SHINOBU S.,NAGAO TOHRU,MURAYAMA TAKASHI The Korean Astronomical Society 2003 Journal of The Korean Astronomical Society Vol.36 No.3
The 8m class telescopes in the ground-based optical astronomy together with help from the ultra-sharp eye of the Hubble Space Telescope have enabled us to observe forming galaxies beyond red shift z = 5. In particular, more than twenty Ly$\alpha$-emitting galaxies have already been found at z > 5. These findings provide us with useful hints to investigate how galaxies formed and then evolved in the early universe. Further, detailed analysis of Ly$\alpha$ emission line profiles are useful in exploring the nature of the intergalactic medium because the trailing edge of cosmic reionization could be close to z $\~$ 6 -7, at which forming galaxies have been found recently. We also discuss the importance of superwinds from forming galaxies at high redshift, which has an intimate relationship between galaxies and the intergalactic medium. We then give a review of early cosmic star formation history based on recent progress in searching for Ly$\alpha$-emitting young galaxies beyond red shift 5.
Honeybee Colony Losses during 2008~2010 Caused by Pesticide Application in Japan
Takaharu Taniguchi,Yuusuke Kita,Takashi Matsumoto,Kazuo Kimura 한국양봉학회 2012 韓國養蜂學會誌 Vol.27 No.1
Recent declining numbers of honeybees, Apis mellifera, in colonies threatens crop production as well as feral plant community biodiversity. Chemicals applied in agroecosystems are regarded as one of primary causes of the decline. In Japan, the heavy loss of honeybee colonies associated with pesticide use has been reported from beekeepers recently, leading to lessened use of honeybee colonies to facilitate pollination of cultivates. Nevertheless, no study has quantitatively examined the damage to honeybee colonies caused by the pesticide application in Japanese agricultural fields to date. To explore actual honeybee damage caused by the pesticide use, we performed an extensive survey of honeybee colony loss putatively caused by pesticide application by asking Japanese beekeepers to identify bee losses for three years: 2008~2010. The respective numbers of damaged honeybee hives were 11,659, 11,533 and 8,328. The estimated amounts of damage were ¥201.1 million, ¥253.8 million, and ¥178.0 million for 2008, 2009, and 2010. Heavy losses were concentrated in particular prefectures (Hokkaido, Iwate, and Wakayama) although losses occurred throughout Japan. In Hokkaido, the area of damage was concentrated exclusively in central areas. More than 90% of damage occurred in mid-summer. Pesticide-sprayed crops, suspected of causing the loss, amounted to 20 crops, but 75.0~83.3% of damaged hives, and 86.0~92.3% of damage amounts were of only two crops: rice and orange. Overwhelmingly, neonicotinoids were identified as responsible for the losses, accounting for 91.4% in 2009 and 81.7% in 2010 for damaged hives, and 93.2% in 2009, 92.4% in 2010 for damage amounts.
Planar graphene Josephson coupling via van der Waals superconducting contacts
이종윤,김민수,Kenji Watanabe,Takashi Taniguchi,이길호,이후종 한국물리학회 2019 Current Applied Physics Vol.19 No.3
We report on the fabrication and transport characteristics of van der Waals (vdW)-contacted planar Josephson junctions. In a device, two pieces of cleaved 2H-NbSe2 superconducting flakes and a monolayer graphene sheet serve as the superconducting electrodes and the normal-conducting spacer, respectively. A stack of NbSe2−graphene−hexagonal-boron-nitride (hBN) heterostructure with clean and flat interfaces was prepared by a dry transfer technique. The outermost hBN layer protected the NbSe2−graphene−NbSe2 Josephson junction from chemical contamination during the fabrication processes. The Josephson coupling was confirmed by a periodic modulation of the junction critical current Ic in a perpendicular magnetic field. The temperature dependence of Ic showed long and diffusive Josephson coupling characteristics. The temperature dependence of the superconducting gap, obtained from the multiple Andreev reflection features, followed the Bardeen−Cooper−Schrieffer (BCS) prediction.
Developing a Hardware Neural Network for Memorizing Temporal Patterns
Sungyoon YOON,Kousuke TANIGUCHI,Takashi HORIKANE,Yoshifumi SEKINE 대한전자공학회 2007 ITC-CSCC :International Technical Conference on Ci Vol.2007 No.7
It is known that the hippocampus, related to the information processing of memorizing and learning in the brain, is a special part of short-term memory. The synaptic plasticity of the hippocampus is remarkable. The transmission efficiency of the synapse is changed by the synaptic plasticity, and it is thought that the increase and decrease of the transmission efficiency are memories. We construct a hardware NN that considers the synaptic plasticity for the purpose of constructing the hardware NN, that can output the memorized temporal pattern. We also examine the response characteristic, that the change of the transmission efficiency of the synapse by the synaptic plasticity, is a synaptic weight.
Interface States in Bilayer Graphene Encapsulated by Hexagonal Boron Nitride
Lee, Kayoung,Liu, En-Shao,Watanabe, Kenji,Taniguchi, Takashi,Nah, Junghyo American Chemical Society 2018 ACS APPLIED MATERIALS & INTERFACES Vol.10 No.48
<P>The threshold voltages at the onset of conduction for electron and hole branches can provide information on band gap values or interface states in a gap. We measured conductivity of bilayer graphene encapsulated by hexagonal boron nitride as a function of back and top gates, where another bilayer graphene is used as a top gate. From the measured conductivity the transport gap values were extracted assuming zero interface trap states, and they are close to the theoretically expected gap values. From a little discrepancy an average density of interface states per energy within a band gap (<I>D</I><SUB>it</SUB>) is also estimated. The data clearly show that <I>D</I><SUB>it</SUB> decreases as a bilayer graphene band gap increases rather than being constant. Despite the decreasing trend of <I>D</I><SUB>it</SUB>, interestingly the total interface states within a gap increases linearly as a band gap increases. This is because of ∼2 × 10<SUP>10</SUP> cm<SUP>-2</SUP> interface states localized at band edges even without a band gap, and other gap states are equally spread over the gap.</P> [FIG OMISSION]</BR>