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Argumentative Conversational Agents for Online Discussions

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Journal of Systems Science and Systems Engineering 2021年第4期30卷 450-464页

作者： Rafik Hadfi Jawad Haqbeen Sofia Sahab Takayuki ito Department of Social Informatics Kyoto UniversityYoshidahonmachiSakyo WardKyotoJapan606-8501 Nagoya Institute of Technology Gokiso-choShowa-kuNagoyaAichiJapan466-8555

Artificial Intelligence is revolutionising our communication practices and the ways in which we interact with each other. This revolution does not only impact how we communicate, but it affects the nature of the partners with whom we communicate. Online discussion platforms now allow humans to communicate with artificial agents in the form of socialbots. Such agents have the potential to moderate online discussions and even manipulate and alter public opinions. In this paper, we propose to study this phenomenon using a constructed large-scale agent platform. At the heart of the platform lies an artificial agent that can moderate online discussions using argumentative messages. We investigate the influence of the agent on the evolution of an online debate involving human participants. The agent will dynamically react to their messages by moderating, supporting, or attacking their stances. We conducted two experiments to evaluate the platform while looking at the effects of the conversational agent. The first experiment is a large-scale discussion with 1076 citizens from Afghanistan discussing urban policy-making in the city of Kabul. The goal of the experiment was to increase the citizen involvement in implementing Sustainable Development Goals. The second experiment is a small-scale debate between a group of 16 students about globalisation and taxation in Myanmar. In the first experiment, we found that the agent improved the responsiveness of the participants and increased the number of identified ideas and issues. In the second experiment, we found that the agent polarised the debate by reinforcing the initial stances of the participant.

关键词： Artificial intelligence conversational agents natural language processing online discussion computational social science

Molecular design and application of luminescent materials composed of group 13 elements with an aggregation-induced emission property

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National Science Review 2021年第6期8卷 80-93页

作者： Shunichiro ito Masayuki Gon Kazuo Tanaka Yoshiki Chujo Department of Polymer Chemistry Graduate School of EngineeringKyoto University

Complexation of π-conjugated ligands by metal or semimetal ions leads to the enhancement of the planarity and rigidity of π-conjugated systems. Boron, especially, has played a central role in the design of luminescent main-group complexes. However, these complexes still suffer the disadvantage of aggregation-caused quenching as well as typical organic fluorophores. It has recently been reported that some types of boron complexes exhibit the aggregation-induced emission(AIE) property. Moreover, AIE behavior from complexes and organometallic compounds composed of the other group 13 elements, such as aluminum and gallium, has emerged in this decade. These observations greatly encourage us to develop advanced functional materials based on the group 13 elements. Indeed, recent research has demonstrated that these classes of materials are potentially versatile scaffolds for constructing chromic luminophores,efficiently emissive π-conjugated polymers and so on. This review mainly describes AIE-active group 13 complexes with four-coordinate structures and their application as photo-functional materials. Proposed mechanisms of the origins of AIE behavior are briefly discussed.

关键词： aggregation-induced emission crystallization-induced emission chromism conjugated polymer group 13

Recent Research and Development of Optical Fiber Monitoring in Communication Systems

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Photonic Sensors 2013年第4期3卷 304-313页

作者： Kunihiro TOGE Fumihiko ito NTT Access Network Service Systems Laboratories NTT Corporation Tsukuba Ibaraki 305-0805 Japan

Recent progress on optical fiber monitoring in the optical communication systems is reviewed along with current optical fiber monitoring and diagnosing problems in deployed access, trunk and submarine communication sy... 详细信息

关键词：光通信系统光纤监测开发光纤监控诊断问题

Immersed Interface CIP for One Dimensional Hyperbolic Equations

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Communications in Computational Physics 2014年第6期16卷 96-114页

作者： Kazufumi ito Tomoya Takeuchi Department of Mathematics North Carolina State UniversityRaleighNC 27695USA. Collaborative Research Center for Innovative Mathematical Modelling Institute of Industrial ScienceUniversity of TokyoTokyoJapan. FIRST Aihara Innovative Mathematical Modelling ProjectJSTKawaguchiJapan.

The immersed interface technique is incorporated into CIP method to solve one-dimensional hyperbolic equations with piecewise constant *** proposed method achieves the third order of accuracy in time and space in the vicinity of the interface where the coefficients have jump discontinuities,which is the same order of accuracy of the standard CIP *** numerical tests are given to verify the accuracy of the proposed method.

关键词： CIP method immersed interface method hyperbolic equations in discontinuous media.

Selective Mimics of Strigolactone Actions and Their Potential Use for Controlling Damage Caused by Root Parasitic Weeds

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Molecular Plant 2013年第1期6卷 88-99页

作者： Kosuke Fukui Shinsaku ito Tadao Asami Graduate School of Agricultural and Life Sciences University of Tokyo 1-1-1 Yayoi Bunkyo Tokyo Japan 113-8657 JST CREST 1-1-1 Yayoi Bunkyo Tokyo Japan 113-8657

Strigolactones （SLs） are a novel class of plant hormones and rhizosphere communication signals, although the molecular mechanisms underlying their activities have not yet been fully determined. Nor is their application in agriculture well developed. The importance of plant hormone agonists has been demonstrated in both basic and applied research, and chemicals that mimic strigolactone functions should greatly facilitate strigolactone research. Here, we report our discovery of a new phenoxyfuranone compound, 4-Br debranone （4BD）, that shows similar activity to that of the major strigolactone （SL） analog GR24 in many aspects of a biological assay on plants. 4BD strongly inhibited tiller bud outgrowth in the SL-deficient rice mutant d10 at the same concentration as GR24, with no adverse effects, even dur- ing prolonged cultivation. This result was also observed in the Arabidopsis thaliana SL-deficient mutants max1, max3, and max4. However, the application of 4BD to the Arabidopsis SL-insensitive mutant max2 induced no morphological changes in it. The expression of SL biosynthetic genes was also reduced by 4BD treatment, probably via negative feed- back regulation. However, in a seed germination assay on Striga hermonthica, a root parasitic plant, 4BD showed far less activity than GR24. These results suggest that 4BD is the first plant-specific strigolactone mimic.

关键词： strigolactones plant growth regulator Arabidopsis rice debranone branching tillering.

Multi-parameter Tikhonov Regularization—An Augmented Approach

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数学年刊：B辑英文版 2014年第3期35卷 383-398页

作者： Kazufumi ito Bangti JIN Tomoya TAKEUCHI Center for Research in Scientific Computation & Department of Mathematics North Carolina State University Department of Mathematics University of California Riverside 900 University Ave.Riverside CA92521 USA. Collaborative Research Center for Innovative Mathematical Modelling Institute of Industrial ScienceThe University of Tokyo 4-6-1-Cw601 Komaba Meguro-ku Tokyo 153-8505 Japan.

We study multi-parameter regularization(multiple penalties) for solving linear inverse problems to promote simultaneously distinct features of the sought-for objects. We revisit a balancing principle for choosing regularization parameters from the viewpoint of augmented Tikhonov regularization, and derive a new parameter choice strategy called the balanced discrepancy principle. A priori and a posteriori error estimates are provided to theoretically justify the principles, and numerical algorithms for efficiently implementing the principles are also provided. Numerical results on deblurring are presented to illustrate the feasibility of the balanced discrepancy principle.

关键词： Tikhonov正则化增强方法平衡原则后验误差估计正则化参数选择策略数值算法数值结果

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Geochemistry of Triassic Siliceous Rocks of the Muyinhe Formation in the Changning-Menglian Belt of Southwest China

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Journal of Earth Science 2016年第3期27卷 403-411页

作者： Tsuyoshi ito Xin Qian Qinglai Feng State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Stratigraphy and Tectonics Research Group Institute of Geology and Geoinformation Geological Survey of Japan School of Earth Sciences China University of Geosciences

The Changning-Menglian belt, distributed over southwestern Yunnan Province in Southwest China, contains oceanic rocks that are considered to be remnants of the Paleotethys. This study observed Triassic siliceous rocks of the Muyinhe Formation in the Changning-Menglian belt and analyzed their geochemistry. The samples have high concentrations of SiO2（81.65 wt.%–88.38 wt.%; average： 84.99 wt.%±2.14 wt.%）. Most of the samples were plotted in the non-hydrothermal field on the Al-Fe-Mn diagram. Most of the samples were plotted in the continental margin field on the Fe2O3/TiO2-Al2O3/（Al2O3＋Fe2O3） and（La/Ce）N-Al2O3/（Al2O3＋Fe2O3） diagrams. Moreover, the samples show a flat REE（rare earth element） pattern normalized to NASC（North America shale composite）. These geochemical results, in addition to the lack of rhythmical bedding of the siliceous rocks, strongly suggest that the siliceous rocks are unlikely to represent pelagic deposits. Although previous studies have suggested that the siliceous rocks are pelagic deposits, the present results indicate that the extent of the pelagic ocean basins in the Paleotethys during the Triassic is probably less than previously believed. These non-pelagic deposits may represent the closure stage of the Paleotethys.

关键词： geochemistry Triassic siliceous rock Paleotethys Muyinhe Formation Changning-Menglian belt

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Laparoscopic repair of diaphragmatic hernia associating with radiofrequency ablation for hepatocellular carcinoma:A case report

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World Journal of Clinical Cases 2022年第20期10卷 7020-7028页

作者： Junya Tsunoda Tomohiko Nishi Takafumi ito Gaku Inaguma Tomohiko Matsuzaki Hiroaki Seki Nobutaka Yasui Michio Sakata Akihiko Shimada Hidetoshi Matsumoto Department of Surgery Keiyu HospitalYokohama 220-8521Japan Department of Internal Medicine Keiyu HospitalYokohama 220-8521Japan

BACKGROUND Radiofrequency ablation(RFA)is an effective treatment for early-stage hepatocellular carcinoma(HCC).Although RFA is a relatively safe technique compared with surgery,several complications have been reported to be following/accompanying this *** diaphragmatic hernia caused by RFA is rare;however,the best surgical approach for its treatment is *** present a case of laparoscopic repair of diaphragmatic hernia due to *** SUMMARY An 80-year-old woman with segment VIII HCC was treated twice in 5 years with RFA;28 mo after the second RFA,the patient complained of right hypochondriac *** tomography revealed that the small intestine was incarcerated in the right *** patient was diagnosed with diaphragmatic hernia and underwent laparoscopic repair by non-absorbable running *** patient’s postoperative course was favorable,and the patient was discharged on postoperative day *** diaphragmatic hernia has not recurred 24 mo after *** Laparoscopic treatment of iatrogenic diaphragmatic hernia is effective and minimally invasive.

关键词： Diaphragmatic hernia Radiofrequency ablation Hepatocellular carcinoma Complication Laparoscopic surgery Case report

Self-/conspecific discrimination and superparasitism strategy in the ovicidal parasitoid Echthrodelphax fairchildii （Hymenoptera： Dryinidae）

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Insect Science 2014年第6期21卷 741-749页

作者： Emi ito Yoshihiro Y. Yamada Insect Ecology Laboratory Graduate School of Bioresources Mie University Tsu Mie Japan

Superparasitism in solitary parasitoids results in fatal competition between the immature parasitoids, and consequently only one individual can emerge. In the semisoli- tary ovicidal parasitoid Echthrodelphaxfairchildii （Hymenoptera： Dryinidae）, 2 adults can emerge under superparasitism with a short interval （〈24 h） between the first and second ovipositions. We determined the female parasitoid＇s behavioral responses under self- and conspecific superparasitism bouts with first-to-second oviposition intervals of 〈2 h. The self- and conspecific superparasitizing frequencies increased up to an oviposition interval of 0.75 h, with the former remaining lower than the latter, particularly for oviposition intervals of _〈0.25 h, suggesting the existence of self-/conspecific discrimination. The superparasitizing frequency plateaued for oviposition intervals of _〉0.75 h, with no dif- ference between self- and conspecific superparasitism. The ovicidal-probing frequency did not differ under self- and conspecific superparasitism, and was usually 〈20%. The females exhibited no preference for the oviposition side （i.e., ovipositing on the side with or without the first progeny） and almost always laid female eggs for any oviposition in- terval under self- and conspecific superparasitism. The sex ratio was not affected by the type of superparasitism, oviposition sides, or the occurrence of ovicidal probing. These observed results about the oviposition side, ovicidal probing, and sex ratios differed from the predictions obtained assuming that the females behave optimally. Possible reasons for the discrepancies are discussed： likely candidates include the high cost of selecting oviposition sides and ovicidal probing, and, for the sex ratio, the low frequency of encountering suitable hosts before superparasitism bouts.

关键词： infanticide ovicide plant hopper self-recognition sex ratio