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Measurement of droplet size distribution in core region of high-speed spray by micro-probe L2F

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Journal of Thermal Science 2008年第1期17卷 90-96页

作者： Daisaku Sakaguchi Oluwo le Amida hironobu ueki Masahiro Ishida Graduate School of Science and Technology Nagasaki University1-14 Bunkyo-machi Nagasaki 852-8521 JAPAN Faculty of Engineering Nagasaki University Professor

为了在柴油的核心区域调查微滴尺寸的分发，喷洒，微滴尺寸的即时测量被先进激光 2 焦点速度计(L2F ) 进行。L2F 的微规模的探查由二 foci 组成，在他们之间的距离是 36 μ m。测试的嘴有 0.2 公里直径单个洞。注射压力，针电梯，和曲... 详细信息

为了在柴油的核心区域调查微滴尺寸的分发，喷洒，微滴尺寸的即时测量被先进激光 2 焦点速度计(L2F ) 进行。L2F 的微规模的探查由二 foci 组成，在他们之间的距离是 36 μ m。测试的嘴有 0.2 公里直径单个洞。注射压力，针电梯，和曲柄角度的大小被 L2F 在位置与测量同步从嘴出口的 10 公里 downstream。比在在针下面的离开轴区域，完整的电梯调节并且微滴尺寸的空间分发改变速度集合，水花轴附近的微滴才大。在水花核心区域的微滴尺寸的概率密度分发能在大多数注射时期被适合到 Nukiyama-Tanasawa 分发，这被发现。

关键词：飞沫瓦解光学特征激光聚集速度计

Control of Secondary Flow in a Low Solidity Circular Cascade Diffuser

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Journal of Thermal Science 2012年第4期21卷 384-390页

作者： Daisaku Sakaguchi Takuji Fujii hironobu ueki Masahiro Ishida Hiroshi Hayami Nagasaki University 1-14 Bunkyo-machi Kyushu University (retired)

According to the previous experimental works on the low solidity circular cascade diffuser (LSD), a pressure recovery of a centrifugal blower was improved by the LSD significantly in a wide range of flow rate, and the pres-sure recovery was improved further by the LSD with a tandem cascade in comparison with the LSD with a sin-gle-row cascade. In the present study, the flow behavior in the LSD with the tandem cascade has been analyzed numerically by using the commercial CFD code of ANSYS-CFX12. It was shown clearly that the higher pressure recovery was achieved by applying the LSD with the tandem cascade, and the high pressure recovery is based on the high pressure rise in the vaneless space upstream of the LSD and the high blade loading of the front blade of the LSD. The high pressure recovery in the LSD could be achieved by controlling the flow separation on the suc-tion surface of the front blade and also on that of the rear blade due to formation of the favorable secondary flow and due to increase in mass flow passing through the slit section between the front and rear blades.

关键词：控制梯级循环二次流扩散器压力恢复离心式鼓风机质量流量

A new electric field mill array with each of the mill’s rotor controlled precisely by a GPS module:Equipment and initial results

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Earth and Planetary Physics 2024年第2期8卷 423-435页

作者： Kozo Yamashita hironobu Fujisaka DaoHong Wang Hiroyuki Iwasaki Kazuo Yamamoto Koichiro Michimoto Masashi Hayakawa Department of Production Systems Engineering and Sciences Komatsu UniversityNu 1-3 Shicho-machiKomatsuIshikawa 923-8511Japan Fujisaka Technology Office 1058-5 Yoshizawa-choOhta-shiGunma 373-0019Japan Department of Electrical Electronic and Computer EngineeringGifu University1-1 YanagidoGifu CityGifu 501-1193Japan Cooperative Faculty of Education Gunma University4-2-Aramaki-machiMaebashiGunma 371-8510Japan Department of Electrical and Electronic Engineering Chubu University1200 Matsumoto-choKasugaiAichi 487-8501Japan Independent Researcher Kosenba Town 2-44-11-406Kawagoe CitySaitama350-0036Japan Advanced Wireless&Communications Research Center The University of Electro-Communications1-5-1 ChofugaokaChofuTokyo 182-8585Japan

We have newly designed an electrostatic sensor,called an electric field mill(EFM),to simplify the estimation of the charge position and charge amount transferred by lightning *** is necessary for this remote estimation of the transferred charge to measure electric field changes caused by charge loss at the time of a lightning strike at multiple *** multiple-station measurement of electric field changes,not only speed but also phase for exposure and shielding of the sensing plates inside each EFM of the array should be synchronized to maintain the sensitivities of the deployed ***,there is no such EFM with specified speed and phase control performance of the rotary ***,we developed a new EFM in which the rotary mechanism was controlled consistently to within 3%error by a GPS *** EFMs had been distributed in the Hokuriku area of Japan during the winter season of 2022-2023 for a test *** we describe the design and a simple calibration method for our new EFM *** analysis method based on the assumption of a simple monopole charge structure is also *** validation,locations of assumed point charges were compared with three-dimensional lightning mapping data estimated by radio observations in the MF-HF *** results indicated the validity to estimate transferred charge amounts and positions of winter cloud-to-ground lightning discharges with our new EFM array.

关键词： lightning electrostatic field electric field mill electric field change

Excellentπ-Bowl Semiconductors Based on C_(70)Subunit

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CCS Chemistry 2024年第2期6卷 353-364页

作者： Meng Chen Yuxiao Duan Xinyue Liu Qian Zhan hironobu Hayashi Kyohei Matsuo Hiroko Yamada Guangpeng Gao Yonghao Zheng Lei Zhang Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing 100029 School of Optoelectronic Science and Engineering University of Electronic Science and Technology of China(UESTC)Chengdu 610054 Division of Materials Science Nara Institute of Science and Technology(NAIST)IkomaNara 630-0192 Key Laboratory of Cluster Science of Ministry of Education Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion MaterialsSchool of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 100081

As open substructures of fullerenes,aromaticπ-bowls are promising candidates as new organic semiconductors,as well as attractive hosts for *** demonstrate herein the synthesis and characterization of a novel C_(2v)symmetricπ-bowl,pyracyleno[6,5,4,3,2,1-pqrstuv]pentaphene(3).Bowl 3 was equipped with two distinctive reactive sites,allowing for bromination and cross-coupling reactions to readily yield functionalized bowls with two 2,4,6-trimethylphenyl(5)and triethylsilyl(TES)-ethynyl(6)substituents,***-temperature 1H NMR analysis and density functional theory(DFT)calculations indicated bowl-to-bowl inversions of 3,5,and 6 at room *** alternating the substituents,the crystal structures of the threeπ-bowls 3,5,and 6 could be controlled from 1D linear to 1D slipped to 2D herringbone packing motifs,providing insight into the packing behavior ofπ-bowls.1H NMR titration study indicated that the TES-ethynyl substituent enhanced the ability ofπ-bowl to bind C_(70)with an association constant of 2485 M−*** C_(70)molecules withπ-bowls 3 and 6 formed 1:1 complexes,in which C_(70)molecules aggregated into zig-zag and 1D linear arrays,*** hole mobility of 2.3 cm^(2)V^(−1)^s(−1)and electron mobility of 0.16 cm^(2)V^(−1)^s(−1)ofπ-bowl 3 and its complex with C_(70)were demonstrated,respectively,which proved a great value for the development of aromaticπ-bowl semiconductors with tunable properties for organic electronic devices.

关键词： organic semiconductor π-bowl fullerene crystal engineering mobility

Initial decrease in the lipoprotein(a)level is a novel prognostic biomarker in patients with acute coronary syndrome

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World Journal of Cardiology 2024年第6期16卷 329-338页

作者： Yasuhiko Saeki Jun Sawaguchi Satori Akita Taka-aki Takamura Kosuke Fujibayashi Minoru Wakasa hironobu Akao Michihiko Kitayama Yasuyuki Kawai Kouji Kajinami Department of Cardiology Kanazawa Medical UniversityUchinada 9200293Japan Trans-catheter Cardiovascular Therapeutics Kanazawa Medical UniversityUchinada 9200293Japan

BACKGROUND Lipoprotein(a)[Lp(a)]is a causal risk factor for atherosclerotic cardiovascular diseases;however,its role in acute coronary syndrome(ACS)remains *** To investigate the hypothesis that the Lp(a)levels are altered by various conditions during the acute phase of ACS,resulting in subsequent cardiovascular *** From September 2009 to May 2016,377 patients with ACS who underwent emergent coronary angiography,and 249 who completed≥1000 d of follow-up were ***(a)levels were measured using an isoform-independent assay at each time point from before percutaneous coronary intervention(PCI)to 48 h after *** primary endpoint was the occurrence of major adverse cardiac events(MACE;cardiac death,other vascular death,ACS,and non-cardiac vascular events).RESULTS The mean circulating Lp(a)level decreased significantly from pre-PCI(0 h)to 12 h after(19.0 mg/dL to 17.8 mg/dL,P<0.001),and then increased significantly up to 48 h after(19.3 mg/dL,P<0.001).The changes from 0 to 12 h[Lp(a)Δ0-12]significantly correlated with the basal levels of creatinine[Spearman’s rank correlation coefficient(SRCC):-0.181,P<0.01]and Lp(a)(SRCC:-0.306,P<0.05).Among the tertiles classified according to Lp(a)Δ0-12,MACE was significantly more frequent in the lowest Lp(a)Δ0-12 group than in the remaining two tertile groups(66.2%vs 53.6%,P=0.034).A multivariate analysis revealed that Lp(a)Δ0-12[hazard ratio(HR):0.96,95%confidence interval(95%CI):0.92-0.99]and basal creatinine(HR:1.13,95%CI:1.05-1.22)were independent determinants of subsequent *** Circulating Lp(a)levels in patients with ACS decreased significantly after emergent PCI,and a greater decrease was independently associated with a worse prognosis.

关键词： Lipoprotein(a) Acute coronary syndrome Percutaneous coronary intervention Major adverse cardiac events Prognosis

A Series of Soluble Planar Oligorylenes up to Hexarylene

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Chinese Journal of Chemistry 2023年第9期41卷 1023-1027页

作者： Ryuichi Fujita Shoko Yoshida Haruka Kano Kyohei Matsuo hironobu Hayashi Hiroko Yamada Naoki Aratani Division of Materials Science Nara Institute of Science and Technology(NAIST)8916-5 Takayama-choIkoma 630-0192Japan

Preparation of large rylenes often needs the use of solubilizing groups along the rylene backbone,which results in the distortion of the skeleton and thus broadening of the absorption *** this work,we successfully synthesized 2,5,8,16,19,22-hexakis[2,6-bis(tri-fluoromethyl)phenyl]hexarylene(H)by using an oxidative fusion reaction of perylene trimer in 5%*** product is soluble in common organic solvents and could be purified with column ***-crystal X-ray diffraction analysis revealed that the hexarylene core is not disturbed by the substituents very much and is almost *** longest absorption of H exhibits a sharp peak at 831 nm and an on-set at 875 nm in toluene with a small full-width-at-half-maximum(FWHM)of 660 cm^(-1).The molar extinction coefficient is as large as 131,000 M^(-1)cm^(-1).The substituents could not perturb the electronic properties of the hexarylene because aryl groups are perpendicular to the hexarylene core and the carbon atoms at 2,5,16,19-positions have negligible coeffi-cients on its HOMO and LUMO,estimated by theoretical *** a result,the hexarylene having less absorption at the visible light region was stable enough in solution under the LED room light for more than 1 *** strategy gives a useful guideline to establish the near-infrared materials that exhibit stability under ambient conditions.

关键词： Oligorylenes Undistorted skeleton Near infrared absorption Crystal structure Effective conjugation length

A Study of Quantitative Progress Evaluation Models for Open Source Projects

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Journal of Software Engineering and Applications 2022年第5期15卷 183-196页

作者： hironobu Sone Yoshinobu Tamura Shigeru Yamada Graduate School of Sciences and Technology for Innovation Yamaguchi University Yamaguchi Japan Graduate School of Engineering Tottori University Tottori Japan

Open source software (OSS) has become an indispensable part of society, not only for personal use but also for corporate use. Projects developed and operated by OSS are called open source projects, and the number of such projects is increasing. On the other hand, because anyone can participate in an open source project, the progress of the project is uncertain due to differences in project members’ skills, development environments, and time zones of activity. Therefore, many users and companies need to understand the development and operation status of open source project. Then, the developers carefully make decisions on upgrading or installing new OSS. In this paper, we focus on the maintenance effort estimation for open source projects considering uncertainty. Also, we evaluate the project quantitatively using Earned Value Management (EVM). Moreover, we examine the appropriateness of the model for predicting the maintenance effort expeditures. Furthermore, we discuss the appropriateness of this EVM method.

关键词： Open Source Software Stochastic Differential Equation Earned Value Management Software Reliability Growth Model

Field survey of a sustainable sanitation system in a residential house

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Journal of Environmental Sciences 2006年第6期18卷 1088-1093页

作者： Naoko NAKAGAWA Masahiro OTAKI Shinji MIURA hironobu HAMASUNA Katsuyoshi ISHIZAKI Department of Human Environmental Sciences Ochanomizu University2-1-1OtsukaBunkyo-KuTokyo 112-8610Japan. City Maintenance Technical Research Center 2-9-23ShinjuShinjuku-KuTokyo 160-0023Japan Nagasaki Institute of Applied Science 536Abama-choNagasaki-shiNagasaki Pref.851-0123Japan Research Institute for a Sustainable Future Waseda University513 Tsurumaki-ChouWasedaShinjuku-KuTokyo 169-8050Japan

Sustainable sanitation is an approach for more ecological and sustainable water resources management. In this paper, we proposed one of the new integrated waste treatment systems： an ＂sustainable sanitation system＂ that includes separation of the black water from water system by a non-flushing toilet （bio-toilet）, and a gray water treatment based on a biological and ecological concept. Sustainable sanitation system also converts the domestic waste to soil conditioners and fertilizers, for farmland use. As one of the case studies, Environmentally Symbiotic Housing in which people actually live using the bio-toilet for the black water treatment and the household wastewater treatment facility for the gray water was introduced. The availability of this system was investigated by analyzing the sawdust used in the bio-toilet and the quality of the effluent in the household wastewater treatment facility. As the result, the water content of the sawdust did not exceed 60% in any of the sampling points and the BOD and COD of the effluent of the household wastewater treatment facility were below 10 and 20 mg/L respectively, due to the low loading. Compared to the pollution load on the water environment created by the conventional system, it was found that the effluent of the house has a lower load than the tertiary treatment and the volume of the water consumption is 75% of the conventional system.

关键词： bio-toilet pollution load sustainable sanitation system water consumption

Evaluation of the Fatigue Characteristics of Laser-processed Hot Work Tool Steel Based on Reliability

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Journal of Materials Science & Technology 2003年第Z1期19卷 83-85页

作者： Satoshi HANAKI Yahong SUI Masato YAMASHITA Hitoshi UCHIDA hironobu TSUJII Graduate School of Engineering Himeji Institute of Technology Japan Himeji Institute of Technology Japan Graduate School of Engineering Himeji Institute of Technology Japan Graduate School of Engineering Himeji Institute of Technology Japan Technical Research Laboratories Sanyo Special Steel Co Japan

It is reported that laser-processing is effective to repair the heat checks, which are fine shallow cracks on a surfaceof die-casting dies. In this study, the rotating bending fatigue tests have been carried out to evaluate the fatiguecharacteristics of laser-processed hot working tool steel. Because test results are scattered, S-N curves are decidedbased on the evaluation of fatigue strength distribution. As a result, the fatigue strength of the laser-processedspecimens decreases remarkably in comparison with that of base metal. However, it can be recovered to almostinitial value by heat treatment at secondary hardening temperature. This procedure is also effective to decrease thescatter of fatigue strength. The laser-processing can be carried out at low cost and this method is effective for theextension of the work life of dies.

关键词： Hot working tool steel, Laser-processing, S-N curve, Fatigue strength, Reliability