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Impacts of invasive Iris pseudacorus L.(yellow flag) establishing in an abandoned urban pond on native semi-wetland vegetation

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Journal of Integrative Agriculture 2018年第8期17卷 1881-1887页

作者： Daisuke Hayasaka Shingo fujiwara Taizo Uchida Graduate School of Agriculture KINDAI University Faculty of Engineering Kyushu Sangyo University

Iris pseudacorus L., intentionally introduced in Japan as an ornamental plant and to improve aquatic environments, has been declared a noxious species in the Invasive Alien Species Act of Japan due to the suspected high ecological risks to the local species and ecosystems. Although prompt responses to I. pseudacorus have been sought to conserve local biodiversity, knowledge about its invasiveness is lacking. Here, we report the relationship between the establishment of I. pseudacorus and floristic changes in semi-wetland vegetation of an abandoned urban pond(Aoike), Nara City, Nara Prepecture, Japan. In total, 64 vascular plants were recorded in the pond, of which 50 were native species, seven were naturalized non-native, and seven were invasive species. On the other hand, most of these vascular plants(42 species) were grassland species and only several aquatic plants(10 species) were found in this study pond. The number of vascular plant species decreased significantly at quadrats with a coverage of I. pseudacorus above 50%. In addition, tendencies of lower number of native species and concomitant higher number of invasive species were found with increasing coverage of I. pseudacorus. From these results, we suggest that it is important to preferentially manage sites where the coverage of I. pseudacorus is above 50%, in order to preserve the local biodiversity. Additionally, as recommended in the literature, it is essential that the cut reproductive organs are kept submerged under deep water for an effective control of I. pseudacorus.

关键词： biodiversity conservation biological invasions ecological impacts exotic species hydrophytes species traits

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ANALYSIS ON PSEUDO-STEADY INDENTATION CREEP

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Acta Mechanica Solida Sinica 2008年第4期21卷 283-288页

作者： Hidenari Takagi Ming Dao Masami fujiwara Division of Applied Physics College of Engineering Nihon University Fukushima Japan Department of Materials Science and Engineering School of Engineering Massachusetts Institute of Technology Massachusetts USA

Theoretical analysis and finite element （FE） simulation have been carried out for a constant specific load rate （CSLR） indentation creep test. Analytical results indicate that both the representative stress and the indentation strain rate become constant after a transient period. Moreover, the FE simulation reveals that both the contours of equivalent stress and equivalent plastic strain rate underneath the indenter evolve with geometrical self-similarity. This suggests that pseudo-steady indentation creep occurs in the region beneath the indenter. The representative points in the region are defined as the ones with the equivalent stress equal to the representative stress. In addition, it is revealed that the proportionality between indentation strain rate and equivalent plastic strain rate holds at the representative points during the pseudo-steady indentation creep of a power law material. A control volume （CV） beneath the indenter, which governs the indenter velocity, is identified. The size of the CV at the indented surface is approximately 2.5 times the size of the impression. The stress exponent for creep can be obtained from the pseudosteady indentation creep data. These results demonstrate that the CSLR testing technique can be used to evaluate creep parameters with the same accuracy as conventional uniaxial creep tests.

关键词： indentation creep finite element method conical indenter geometrical self-similarity,pseudo-steady state control volume stress exponent

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Reaction of Silane Alkoxide with Acid Anhydride as a Novel Synthetic Method for Organic-Inorganic Hybrid Materials

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复旦学报（自然科学版） 2005年第5期44卷 682-683页

作者： Masahiro fujiwara Kansai Center National Institute of Advanced Industrial Science and Technology Ikeda Osaka 563-8577 Japan

Sol-gel method is a potent method to produce new inorganic and organic-inorganic hybrid materials. The key step of this methodology is the hydrolysis of a metal alkoxide or other metal substrates such as acetylacetonates to form hydroxyl metal species, followed by their condensation to metal-oxygen-metal (M - O - M)bonds. In this process, the utilization of water, generally in excess, is essential and alcoholic solvents such as ethanol are often required to homogenize the solution when organic compounds coexist. As the common sol-gel method using water allows for limited uses of organic substrates due to their low solubility and stability in aqueous solution, modified variations of sol-gel method are required. Recently, some processes were reported for preparing metal oxides from metal alkoxides without the utilization of water.

关键词：硅石硅烷醇盐酸酐合成方法分子结构

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东京国立博物馆文化使命的发展

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博物馆管理 2024年第4期 18-23页

作者： [日]藤原诚 [日]杨锐(译) 金燕(译) 日本东京国立博物馆东京中国国家博物馆北京100006

东京国立博物馆始建于1872年,是日本历史最悠久的国立博物馆。作为这座博物馆的第29任馆长,我与职员们共同提出了两大目标,并逐步实施。本文将介绍这两大目标,以及为履行博物馆的文化使命,我们是如何结合近年的发展情况实施各项举措的... 详细信息

东京国立博物馆始建于1872年,是日本历史最悠久的国立博物馆。作为这座博物馆的第29任馆长,我与职员们共同提出了两大目标,并逐步实施。本文将介绍这两大目标,以及为履行博物馆的文化使命,我们是如何结合近年的发展情况实施各项举措的。第一个目标是“建立具有全球影响力的博物馆”。在152年的历史中,东京国立博物馆展出了来自世界各地的文化遗产。

关键词：文化使命国立博物馆全球影响力逐步实施文化遗产馆长历史

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Quantitation of HBsAg predicts response to entecavir therapy in HBV genotype C patients

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World Journal of Gastroenterology 2012年第39期18卷 5570-5575页

作者： Etsuro Orito Kei fujiwara hiroshi Kanie Tesshin Ban Tomonori Yamada Katsumi Hayashi Department of Gastroenterology Nagoya Daini Red Cross HospitalNagoya 466-8650Japan

AIM： To analysis the factors that predict the response to entecavir therapy in chronic hepatitis patients with hepatitis B virus （HBV） genotype C. METHODS： Fifty patients [hepatitis B e antigen （HBeAg）- negative：HBeAg-positive = 26：24] with HBV genotype C, who received nalve entecavir therapy for 〉 2 years, were analyzed. Patients who showed HBV DNA levels ≥ 3.0 log viral copies/mL after 2 years of entecavir ther- apy were designated as slow-responders, while those that showed 〈 3.0 log copies/mL were termed rapid- responders. Quantitative hepatitis B surface antigen （HBsAg） levels （qHBsAg） were determined by the Archi- tect HBsAg QT immunoassay. Hepatitis B core-related antigen was detected by enzyme immunoassay. Pre-C and Core promoter mutations were determined using by polymerase chain reaction （PCR）. Drug-resistance muta- tions were detected by the PCR-Invader method. RESULTS： At year 2, HBV DNA levels in all patients in the HBeAg-negative group were 〈 3.0 log copies/mL. In contrast, in the HBeAg-positive group, 41.7% were slow-responders, while 58.3% were rapid-responders. No entecavir-resistant mutants were detected in the slow-responders. When the pretreatment factors were compared between the slow- and rapid-responders; the median qHBsAg in the slow-responders was 4.57 log IU/mL, compared with 3.63 log IU/mL in the rapid- responders （P 〈 0.01）. When the pretreatment factors predictive of HBV DNA-negative status at year 2 in all 50 patients were analyzed, HBeAg-negative status, low HBV DNA levels, and low qHBsAg levels were signifi- cant （P 〈 0.01）. Multivariate analysis revealed that the low qHBsAg level was the most significant predictive factor （P = 0.03）. CONCLUSION： Quantitation of HBsAg could be a use- ful indicator to predict response to entecavir therapy.

关键词： Chronic hepatitis B Quantitation of hepa-titis B surface antigen Entecavir Hepatitis B virusgenotype C SIow-responders Hepatitis B core-relatedantigen Core promoter mutation Pre-C mutation

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Preparation of High Performance Foamed Concrete from Cement,Sand and Mineral Admixtures

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Journal of Wuhan University of Technology(Materials Science) 2007年第2期22卷 295-298页

作者：潘志华 fujiwara Hiromi Wee Tionghuan College of Materials Science & Engineering Nanjing University of Technology Faculty of Engineering Utsunomiya University7-1-2YotoUtsunomiyacity Department of Civil Engineering National University of Singapore

The titled high performance foamed concrete was developed from Portland cement, ultra fine granulated blast-furnace slag, pulverized fly ash and condensed silica fume by means of pre-foaming process. The resultant foamed concrete presents its thermal conductivity of about 0.16-0.75 W/（m·℃） and 28 d compressive strength of about 1.1-23.7 MPa when its mix proportion varies in the range of cement content 280 kg-650 kg/m^3, fly ash 42-97 kg/m^3, slag 64-146 kg/m^3, silica fume 34-78 kg/m^3, and sand 0-920 kg/m^3. The compressive strength of the foamed concrete with oven dried bulk density of 1500 kg/m^3 in appropriate mix proportion and with small amount of superplasticizer reached as high as 44.1 MPa. Meanwhile, the flesh foamed concrete behaves like an excellent flow-ability, therefore, is especially suitable for the application in case of massive foamed concrete casting in situ and in the case of filling casting into large volume underground irregular voids, except for pre-casting of building components like blocks, bricks, and wall panels.

关键词： foamed concrete density compressive strength thermal conductivity

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Spectroscopic Detection of Chiral Aggregation at Liquid-Liquid Interfaces

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Tsinghua Science and Technology 2006年第2期11卷 228-232页

作者： Hitoshi Watarai Sayaka Wada Kazuhiko fujiwara Department of Chemistry Osaka University Osaka Japan

Two new spectroscopic methods to detect the optical activity of liquid-liquid interfaces have been developed. The first one is the centrifugal liquid membrane （CLM） method combined with a conventional circular dichroism （CD） spectropolarimetry and the second one is a more interfacial specific second harmonic generation CD （SHG-CD） spectrometry. In the CLM-CD method, a cylindrical glass cell containing small amounts of organic and aqueous phases was rotated at about 7000 r/min in a sample chamber of a CD spectropolarimeter to generate an interface with a high specific interfacial area between the two-phase liquid membranes. The CD spectra of the J-aggregate of protonated 5,10,15, 20-tetraphenylporphyrin formed at the toluene-sulfuric acid interface have been measured, As for the SHG-CD, a circularly polarized wavelength-variable fs-laser system was constructed to measure the interfacial SHG spectra of a flat liquid-liquid interface. The ion-associated aggregation of a water-soluble anionic porphyrin promoted with a cationic amphiphile at the heptane-water interface was observed by this technique and the observed SHG-CD spectra proved the generation of a characteristic oPtical activity accompanied by the formation of the interfacial aggregate of inherently achiral porphyrin molecules. These methods will pioneer a new field of interfacial chiral chemistry in the studies of solvent extraction mechanisms.

关键词： chiral aggregation liquid-liquid interface spectroscopic detection centrifugal liquid membrane second harmonic generation circular dichroism

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Corticosteroid and nucleoside analogue for hepatitis B virus-related acute liver failure

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World Journal of Gastroenterology 2015年第36期21卷 10485-10486页

作者： Keiichi fujiwara Shin Yasui Osamu Yokosuka Department of Gastroenterology and Nephrology Graduate School of MedicineChiba University

The early introduction of combination therapy of high-dose corticosteroid and nucleoside analogue is beneficial for the rescue of severe acute exacerbation of chronic hepatitis B.

关键词： Chronic hepatitis B Exacerbation Acute liver failu

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Concise provenance of interactive network analysis

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Visual Informatics 2018年第4期2卷 213-224页

作者： Takanori fujiwara Tarik Crnovrsanin Kwan-Liu Ma University of California DavisUnited States

Large,complex networks are commonly found in many application domains,such as sociology,biology,and software *** such networks can be a non-trivial task,as it often takes many interactions to derive a *** is thus beneficial to capture and summarize the important steps in an *** provenance would then effectively support recalling,reusing,reproducing,and sharing the analysis process and ***,the provenance of analyzing a large,complex network would often be a long interaction *** automatically compose a concise visual summarization of network analysis provenance,we introduce a ranking model together with a reduction *** model identifies and orders important interactions used in the network *** on this model,our algorithm is able to minimize the provenance,while still preserving all the essential steps for recalling and sharing the analysis process and *** create a prototype system demonstrating the effectiveness of our model and algorithm with two usage scenarios.

关键词： Interactive visualization Network data Provenance Visual analytics

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Voltage dependence property of parameters for human body discharge in air through a small metal rod

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The Journal of China Universities of Posts and Telecommunications 2008年第4期15卷 86-90页

作者： RUAN Fang-ming GAO You-gang fujiwara Osamu Department of Electronics and Information Guizhou Normal University Guiyang 550001 China Research Institute of Electromagnetic Compatibility Beijing University of Posts and Telecommunications Beijing 100876 China Faculty of Graduate School Nagoya Institute of Technology Nagoya 466-8555 Japan

Discharge parameters are measured and calculated in electrostatic discharge （ESD） from charged human body through a small moving handheld metal rod. Correlation study has been performed on discharge parameters with charge voltage as well as approach speed. At charge voltage 800 V, difference of discharge parameters caused by fast and slow approach speed of electrode is found to reach extreme values. To explore the reason for this special case, an analysis with a short-gap ESD model is carried out.

关键词： ESD correlation charge voltage parameter approach speed

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