Hiroshi Ishida
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View article: Hydrogen sulfide, hypoxia, and low salinity tolerance of deep-sea amphipods (Pseudorchomene sp.) collected from the sea floor off Joetsu, Sea of Japan
Hydrogen sulfide, hypoxia, and low salinity tolerance of deep-sea amphipods (Pseudorchomene sp.) collected from the sea floor off Joetsu, Sea of Japan Open
Experimental data contributing to the assessment of the environmental impact of deep-sea resource development is very scarce due to limited research opportunities and the difficulty of biological sampling. Experiments using deep-sea organi…
View article: Super-resolution for Gas Distribution Mapping
Super-resolution for Gas Distribution Mapping Open
Gas Distribution Mapping (GDM) is a valuable tool for monitoring the distribution of gases in a wide range of applications, including environmental monitoring, emergency response, and industrial safety. While GDM is actively researched in …
View article: Preliminary study on the acute effects of hydrogen sulfide on Amphipoda (Lysianassoidea; Pseudorchomene sp. and Anonyx sp.) collected from deep-sea floors in the Sea of Japan
Preliminary study on the acute effects of hydrogen sulfide on Amphipoda (Lysianassoidea; Pseudorchomene sp. and Anonyx sp.) collected from deep-sea floors in the Sea of Japan Open
To study the environmental impact of the assessment technologies for the development of shallow methane hydrate zones in the Sea of Japan, deep-sea amphipods (Pseudorchomene sp. and Anonyx sp.) were collected from a depth of approximately …
View article: QCD knows new quarks
QCD knows new quarks Open
We find that a big gap between indicators for the breaking strengths of the global chiral SU(2) and U(1) axial symmetries in QCD of the Standard Model (SM) can be interpreted as a new fine-tuning problem. This may thus imply calling for a …
View article: Long-term ocean acidification trends in coastal waters around Japan
Long-term ocean acidification trends in coastal waters around Japan Open
This study examines long-term ocean pH data to evaluate ocean acidification (OA) trends at two coastal research institutions located on the Sea of Japan and the Pacific Ocean. These laboratories are located away from the influences of larg…
View article: Development of Gas Sensing Drones:
Development of Gas Sensing Drones: Open
In this paper, the development of a quadcopter for gas sensing in a landfill site is reported. When a quadcopter with a long diagonal length flies at a low altitude, the downdrafts from the four rotors reach the ground without merging with…
View article: Detection of Gas Drifting Near the Ground by Drone Hovering Over: Using Airflow Generated by Two Connected Quadcopters
Detection of Gas Drifting Near the Ground by Drone Hovering Over: Using Airflow Generated by Two Connected Quadcopters Open
This paper describes the utilization of the downwashes of multicopters for gas-sensing applications. Multirotor drones are an attractive platform for sensing applications. Their high maneuverability enables swift scanning of a target area …
View article: On the Tutorials, Sniffest Competition, and Special Session on Olfactory Displays in ISOEN 2019
On the Tutorials, Sniffest Competition, and Special Session on Olfactory Displays in ISOEN 2019 Open
本稿では，国際会議ISOEN 2019のプログラムの中から，TutorialsとSniffestコンテストについて紹介する．Sniffestは，学生を対象としたコンテストである．今回は，ガスセンサを搭載したロボットを学生チームが作って持ち寄り，床に付けられた臭跡をたどる速さを競った．また，嗅覚ディスプレイに関する企画セッションを概観する．著者らは，自身が開発した嗅覚ディスプレイ（Smelling Screen）を博物館の企画展示に出展した様子を紹介し，においを大型の電子広告…
View article: Active Chemical Sampling Using Jet Discharge Inspired by Crayfish: CFD Simulations of the Flow Fields Generated by the Jet Discharge Device
Active Chemical Sampling Using Jet Discharge Inspired by Crayfish: CFD Simulations of the Flow Fields Generated by the Jet Discharge Device Open
Here, we report on computational fluid dynamics (CFD) simulations conducted to develop a chemical sample collection device inspired by crayfish. The sensitivity of chemical sensors can be improved when used with a sniffing device. By colle…
View article: Fundamental Study on Odor Reproduction System Using E-Nose
Fundamental Study on Odor Reproduction System Using E-Nose Open
An olfactory display is a device that presents odors to the user’s nose so that he/she can get rich virtual reality experience. The aim of this research project is to develop an olfactory display that can generate multiple different odors.…
View article: Characterization of Soluble Dietary Fiber from Twenty Century Pear Pomaces and Effects of this Soluble Dietary Fiber on Blood Glucose Levels in Rats
Characterization of Soluble Dietary Fiber from Twenty Century Pear Pomaces and Effects of this Soluble Dietary Fiber on Blood Glucose Levels in Rats Open
A water-soluble dietary fiber prepared from 20th century pear pomaces was chemically and biologically characterized. This pear water-soluble dietary fiber mainly contained carbohydrate (approximately 78.1g/100g dry weight), most of which w…
View article: Protection of Workers' Safety; Visit to National Institute of Occupational Safety and Health, Japan
Protection of Workers' Safety; Visit to National Institute of Occupational Safety and Health, Japan Open
1．はじめに
View article: Fundamental Study on Simple Chicken Robot for Promoting Chicks’ Feeding Behavior
Fundamental Study on Simple Chicken Robot for Promoting Chicks’ Feeding Behavior Open
Here we report our research efforts on farm mechanization. From the animal welfare point of view, there have been increased demands for cage-free farming of poultry birds such as egg laying hens. However, cage-free operations generally req…
View article: Review on development of devices for amplifying human olfaction: Approaches using real and virtual concentration method
Review on development of devices for amplifying human olfaction: Approaches using real and virtual concentration method Open
This paper reports on olfactory amplifying systems and reviews related technologies. We have developed two types of olfactory amplifying systems that allow the user to sense smells with amplified sensitivities. In the first system, odor mo…
View article: Application of Convolutional Long Short-Term Memory Neural Networks to Signals Collected from a Sensor Network for Autonomous Gas Source Localization in Outdoor Environments
Application of Convolutional Long Short-Term Memory Neural Networks to Signals Collected from a Sensor Network for Autonomous Gas Source Localization in Outdoor Environments Open
Convolutional Long Short-Term Memory Neural Networks (CNN-LSTM) are a variant of recurrent neural networks (RNN) that can extract spatial features in addition to classifying or making predictions from sequential data. In this paper, we ana…
View article: Stratification and Attainment in a Large Japanese Firm
Stratification and Attainment in a Large Japanese Firm Open
In this chapter, the authors examine the related themes of status advancement and compensation level in a large Japanese company in the mid-1990's. They organize the analysis around the following specific issues: What are the determinants …
View article: Nonlinear Site Amplification Modeling of Response Spectra Using Strong Ground Motion Records
Nonlinear Site Amplification Modeling of Response Spectra Using Strong Ground Motion Records Open
線形時の応答スペクトルの地盤増幅率に非線形性の影響を反映させる手法を提示し，地震観測記録に基づいて，弱震時から強震時に増幅率を変換するモデルの関数（モデル関数）を作成した．関数形は，線形時に対する「1次ピークの長周期化」と「増幅率の低減」に分離して考え，各々を有効ひずみの関数とした．まず，2層地盤に模擬地震動（告示波）を入力した地盤応答解析を行い，その結果に基づいてモデル関数を作成した．モデル関数による増幅率と時刻歴逐次非線形波形から直接算定した増幅率の比はほぼ1で安定し，…
View article: P1SM.2 - Investigation of Water Sampling Assisted by Jets for Active Chemical Sensing System
P1SM.2 - Investigation of Water Sampling Assisted by Jets for Active Chemical Sensing System Open
Here we report our investigations on the effectiveness of jet-assisted active chemical sampling.Crayfish generate jets by waving maxillipeds.The flow induced by the jets is considered to help collect odor samples to their olfactory organs.…
View article: Fundamental Study on Designing Multicopter for Gas Sensing Applications
Fundamental Study on Designing Multicopter for Gas Sensing Applications Open
Here we report our initial results on the computational fluid dynamics analysis of airflow field generated during the flight of a multicopter. We propose to utilize the airflow field to facilitate gas detection on board the multicopter. Wh…
View article: Fundamental Study on Device that can Amplify Odor Intensity:
Fundamental Study on Device that can Amplify Odor Intensity: Open
This paper reports the development of an odor concentrator for presenting intensified odors to aged people with declined olfactory abilities. The aim of this research is to develop an odor concentrator that can concentrate odor molecules w…
View article: Compact Surface Plasmon Resonance Sensor for Underwater Chemical Sensing Robot
Compact Surface Plasmon Resonance Sensor for Underwater Chemical Sensing Robot Open
This paper reports on the development of compact surface plasmon resonance (SPR) sensors for mobile robot olfaction. Underwater robots benefit from olfactory sensing capabilities in various tasks including the search for unexploded ordnanc…
View article: DESIGN EARTHQUAKE GROUND MOTIONS FOR THE SCENARIO EARTHQUAKES AT TOKYO BAY AREA
DESIGN EARTHQUAKE GROUND MOTIONS FOR THE SCENARIO EARTHQUAKES AT TOKYO BAY AREA Open
Three scenario earthquakes, such as Nankai trough mega earthquake, the 1923 Kanto earthquake, and North Tokyo bay earthquake, are selected at Tokyo bay area, based on the seismic hazard analysis and so on. Earthquake ground motions at engi…
View article: Characterization of Hot Water Extract from <i>Nostochopsis </i>sp<i>. </i>and Effects of this Extract on Blood Glucose Levels in Rats
Characterization of Hot Water Extract from <i>Nostochopsis </i>sp<i>. </i>and Effects of this Extract on Blood Glucose Levels in Rats Open
食用藍藻ノストコプシス（Nostochopsis sp.）から熱水抽出物を調製し，化学的および生理的な特徴を明らかにした．調製した熱水抽出物は，炭水化物（約52.3g/100g乾燥重量）が主要な成分であり，そのほとんどが水溶性食物繊維であった．調製した水溶性食物繊維の構成糖は中性糖（約51.2g/100g乾燥重量）と酸性糖（約24.3g/100g乾燥重量）から成り，主要な中性糖はグルコース，フコース，マンノースであった．また，熱水抽出物は0.1% (w/v）の濃度で高い粘性…