Depth First:Optimal Path Discovery Between Designated Nodes in Random Ring-Based Graphs

This paper focuses on optimally determining the existence of connected paths between some given nodes in random ring-based graphs.Serving as a fundamental underlying structure in network modeling,ring topology appears as commonplace in many realistic scenarios.Regarding this,we consider graphs composed of rings,with some possible connected paths between them.Without prior knowledge of the exact node permutations on rings,the existence of each edge can be unraveled through edge testing at a unit cost in one step.The problem examined is that of determining whether the given nodes are connected by a path or separated by a cut,with the minimum expected costs involved.Dividing the problem into different cases based on different topologies of the ring-based networks,we propose the corresponding policies that aim to quickly seek the paths between nodes.A common feature shared by all those policies is that we stick to going in the same direction during edge searching,with edge testing in each step only involving the test between the source and the node that has been tested most.The simple searching rule,interestingly,can be interpreted as a delightful property stemming from the neat structure of ring-based networks,which makes the searching process not rely on any sophisticated behaviors.We prove the optimality of the proposed policies by calculating the expected cost incurred and making a comparison with the other class of strategies.The effectiveness of the proposed policies is also verified through extensive simulations,from which we even disclose three extra intriguing findings:i)in a onering network,the cost will grow drastically with the number of designated nodes when the number is small and will grow slightly when that number is large;ii)in ring-based network,Depth First is optimal in detecting the connectivity between designated nodes;iii)the problem of multi-ring networks shares large similarity with that of two-ring networks,and a larger number of ties between rings will not influence the expected cost.

Economic Security and Japan’s Economic Diplomacy Strategy in Southeast Asia

Japan is increasingly emphasizing its economic security strategy and has included shaping and maintaining economic rules and order in its newly revised national security strategy.It is carrying out economic diplomacy in Southeast Asia through maintaining the economic influence of the Japan-US alliance,weakening China’s economic influence,and shaping Japan’s strategic autonomy.However,there are notable difficulties reconciling some contradictions in Japan’s diplomatic drives,as its strategic capacity may be insufficient to maintain balanced relations among China,the United States and ASEAN.

Japan’s Quasi-Alliance Strategy:Motivations,Practices and Constraints

The quasi-alliance strategy is part of the national security strategy and lies in the grey area between alliance and neutrality.1 In recent years,major countries,including Japan,have positioned quasi-alliance as a feasible unwritten option in their respective national security strategies.2 Japan’s quasialliance strategy was already in its infancy when former Japanese Prime Minister Shinzo Abe first came to power in September 2006 but was put on hold after his resignation in September 2007.

New Trends in Japan's“Indo-Pacific”Strategy

Introduced by the late Prime Minister Shinzo Abe and inherited and developed by Fumio Kishida,Japan's“Indo–Pacific”strategy has gradually taken shape.This strategy can be deemed a broad vision,covering a wide range of topics and an extensive network of partners,with a strong trend of pan-securitization.It is a comprehensive inter national st rateg y based on Japan's alliance policy and China containment strategy,following a global,security-oriented approach.Driven by considerations such as maintaining its economic status,realizing its long-cherished dream of becoming a political powerhouse,and containing China,Japan has stepped up its“Indo–Pacific”strategy,which may influence global development,undermine regional maritime security,and impede China's reunification process.Meanwhile,Japan's“Indo–Pacific”strategy faces the triple challenge of a strategic overdraft,the unstable economic foundations,and the weak external support.These constraints may not suffice to reverse the direction of Japan's“Indo–Pacific”strategy in the short term but will limit its effectiveness.

Comparison on the Origin and Development of Sophora flavescens in China and Japan

Sophora flavescens , which was first recorded in Shen Nong s Herbal Classic , has the functions of clearing away heat, drying dampness, killing parasites and promoting urination. In its long-term application, traditional Chinese medicine has gradually deepened its understanding of the origin and efficacy of S. flavescens . In order to explore changes in the origin and efficacy of traditional Chinese herb S. flavescens in the history of China and Japan, in this paper, the origin and development of S. flavescens in China and Japan were compared from three aspects: the origin, medicinal efficacy, and processing methods of S. flavescens in China and Japan, hoping to provide clear understanding of the medicinal plant S. flavescens .

Vice-President Liu Hongcai Meets Kamada Takeaki, President of the JCI Japan-China Friendship Association

On December 4th,CAFIU Vice-President Liu Hongcai met Mr.Kamada Takeaki,President of the JCI Japan-China Friendship Association(JCFA),to exchange views on China-Japan people-topeople and youth exchanges.Vice-President Liu Hongcai said that JCFA has long been committed to promoting China-Japan youth exchanges and has played a positive role in enhancing mutual understanding between the Chinese and Japanese youths.

China-Japan-ROK Cooperation Embarks on a New Journey

On May 27,China-Japan-ROK Trilateral Summit Meeting was held in Seoul after a hiatus of more than four years.Li Qiang,Premier of the State Council of the People’s Republic of China,Yoon Suk Yeol,President of the ROK,and Fumio Kishida,Prime Minister of Japan,attended and addressed the Summit.

Global Warming in Japanese Cities from 1960 to 2019 Using Machine Learning

In this study, we investigated the variations in warming between Japanese cities for 1960-1989, and 1990-2019 using principal component analysis (PCA) and k-means clustering. The precipitation and sunshine hours exhibited opposite tendencies in the PCA results. It was found that 1960M and 1990M had a correlation (r = 0.51). The 1960M and 1990M are the mean temperature anomalies in Japanese cities for 1960-1989 and 1990-2019, respectively. There was a strong correlation between temperature and precipitation (r = 0.62). There was an inverse correlation between 1960M and sunshine hours (r = −0.25), but a correlation between 1990M and sunshine hours (r = 0.11). Sunshine hours had less effect on the 1960M but more impact on the 1990M. The k-means clustering for 1960M and 1990M can be classified into four types: high 1960M and high 1990M, which indicates that global warming is progressing rapidly (Sapporo, Tokyo, Kyoto, Osaka, Fukuoka, Nagasaki), low 1960M and low 1990M, global warming is progressing slowly (Nemuro, Ishinomaki, Yamagata, Niigata, Fushiki, Nagano, Karuizawa, Mito, Suwa, Iida, Hamada, Miyazaki, Naha), low 1960M and high 1990M, global warming has accelerated since 1990 (Utsunomiya, Kofu, Okayama, Hiroshima), and normal 1960M and normal 1990M, the rate of warming is normal among the 38 cities (Asahikawa, Aomori, Akita, Kanazawa, Maebashi, Matsumoto, Yokohama, Gifu, Nagoya, Hamamatsu, Kochi, Kagoshima). Higher annual temperatures were correlated with higher annual precipitation according to the k-means clustering of temperature and precipitation. Two of the four categories consisted of places with high annual temperatures and high precipitation (Fushiki, Kanazawa, Kochi, Miyazaki, Kagoshima, Naha, Ishigakijima), and places with low annual temperatures and low precipitation (Asahikawa, Nemuro, Sapporo, Karuizawa).

论乡土景观--《Discovering Vernacular Landscape》与乡土景观概念

当前的乡土景观概念日益泛化与模糊。约翰·布林克霍夫·杰克逊(J.B.Jackson,1909—1996)是对美国的文化景观保护工作具有重要影响的著名景观地理学家。首先从对立、视角、类型3个方面,梳理与解析Jackson代表著作《DiscoveringVernacularLandscape》中关于文化景观的独特思考。在此基础上,从概念意义与概念范畴2方面出发,由里及表地重新诠释"乡土景观",继而进一步探讨乡土景观概念对于景观理论以及景观实践的意义。

Discovering Attack Path Oriented-IP Traceback

The technique of IP traceback may effectively block DOS (Denial Of Service) and meet the requirement of the computer forensic, but its accuracy depends upon that condition that each node in the Internet must support IP packet marking or detected agents. So far, this requirement is not satisfied. On the basis of traditional traceroute,this paper investigates the efficiency of discovering path methods from aspects of the size and order of detecting packets, and the length of paths.It points out that the size of padding in probed packets has a slight effect on discovering latency, and the latency with the method of bulk sending receiving is much smaller than one with the traditional traceroute. Moreover, the loss rate of packets with the technique of TTL (Time To Live) which increases monotonously is less than that with the technique of TTL which decreases monotonously. Lastly,OS (Operating System) passive fingerprint is used as heuristic to predict the length of the discovered path so as to reduce disturbance in network traffic.

Knowledge Discovering in Corporate Securities Fraud by Using Grammar Based Genetic Programming

Securities fraud is a common worldwide problem, resulting in serious negative consequences to securities market each year. Securities Regulatory Commission from various countries has also attached great importance to the detection and prevention of securities fraud activities. Securities fraud is also increasing due to the rapid expansion of securities market in China. In accomplishing the task of securities fraud detection, China Securities Regulatory Commission (CSRC) could be facilitated in their work by using a number of data mining techniques. In this paper, we investigate the usefulness of Logistic regression model, Neural Networks (NNs), Sequential minimal optimization (SMO), Radial Basis Function (RBF) networks, Bayesian networks and Grammar Based Genet- ic Programming (GBGP) in the classification of the real, large and latest China Corporate Securities Fraud (CCSF) database. The six data mining techniques are compared in terms of their performances. As a result, we found GBGP outperforms others. This paper describes the GBGP in detail in solving the CCSF problem. In addition, the Synthetic Minority Over-sampling Technique (SMOTE) is applied to generate synthetic minority class examples for the imbalanced CCSF dataset.

Discovery of Paleozoic rocks at northern margin of Sambagawa terrane,eastern Kyushu,Japan:Petrogenesis,U-Pb geochronology and its tectonic implication

Ordovician diorite-quartz diorite mylonite(Saganoseki quartz diorite) was discovered in Sambagawa metamorphic terrane at the northern margin of Saganoseki Peninsula,Kyushu Island,Japan.The LA-ICP-MS zircon U-Pb geochronology revealed that the intrusion age of Saganoseki quartz diorite was 473.3±3.6 Ma.These rocks show the volcanic arc affinity based on the trace element composition.On the basis of geochronological and geochemical results,Saganoseki quartz diorite is considered to be a member of the Early Paleozoic igneous rocks of the Kurosegawa tectonic zone.Saganoseki quartz diorite is located just south of the Median Tectonic Line(MTL)and is in close contact with the pelitic and psammitic schist without any brittle shear zone.U-Pb ages of detrital zircon grains from two psammitic schists show the estimated sedimentation age of early Late Cretaceous,indicate that these psammitic schists are the member of Sambagawa metamorphic rocks.Together with these results and the mode of occurrence in the field,we argue that the Early Paleozoic igneous rocks of the Kurosegawa tectonic zone existed as an upper structural unit of the Sambagawa terrane.This relationship is the key to reconstruct the Mesozoic tectonics of Japan as a part of East Asia,and its evolution through time.

Prevalence of Anxiety and Associated Factors among University Students: A Cross-Sectional Study in Japan

Mental health difficulties can impact students’motivation,focus,and ability to communicate with others.Students attending medical universities are more likely to experience anxiety,depression,and other mood changes for thefirst time.However,no study has examined their prevalence among Japanese rehabilitation students.This study investigated the prevalence of anxiety among Japanese rehabilitation students and aimed to identify its predictors.A cross-sectional study was conducted among 148first-year physical and occupational therapy students at a private medical university in Japan in June 2022.Data on sociodemographic and personal characteristics,such as gender,age,subject major,regular exercise,place of residence,and sleeping hours,were recorded using an original questionnaire.Instruments included the State-Trait Anxiety Inventory,COVID-19 questionnaire,and Beck Depression Inventory–Second Edition(BDI-II).The results indicated that 83(56%)and 77(52%)students exhibited state anxiety and trait anxiety symptoms,respectively.Thirty-four(23%)students experienced mild depressive symptoms.Associations were further determined between gender,subject major,handling of stress,loneliness,satisfaction with life,satisfaction with social connections,anxiety about the future,satisfaction with school life,fulfillment of friendships,and depression.Several variables demonstrated a statistically significant association:handling stress(p<0.05;95%CI 0.409–2.472),satisfaction with life(p<0.01;95%CI 0.500–0.897),anxiety about the future(p<0.01;95%CI 1.397–4.087),and depression(total score of BDI-II,p<0.01;95%CI 1.555–100.742).Our results emphasize that universities must establish a system for early identification and support of anxiety and depression in students.

Biomanufacturing in Japan:frontier research from 2018 to 2023

Biomanufacturing(BM)is a multidisciplinary area incorporating the characteristics of living organisms and engineering principles to create valuable products for various sectors,including medicine,energy,and the environment.BM has undergone a remarkable transformation in the last two decades,entering the era of BM4.0 and becoming a pivotal driver of the sustainable revolution.Notably,Japan has made significant advances in BM,contributing to its development through the creation of innovative materials,advanced processes,and interdisciplinary applications.However,because of certain development policies,this research has not been widely recognized on an international level.This paper provides a comprehensive summary of the research progress made by renowned Japanese laboratories and researchers in biomedical materials,bio-three-dimensional(3D)printing,and biomedical applications in the last five years.Their unique contributions are introduced and analyzed,illuminating the distinctive approaches and breakthroughs within each domain.Additionally,this review highlights the current challenges and prospects of BM.The viewpoints presented in this paper are intended to serve as a valuable reference for scholars studying BM in Japan.

Development Thoughts on Promoting China's Tea Export——Analysis Based on the Experience of India and Japan

Ranking the first in tea production and sales globally,China occupies a decisive position in the global tea market.However,China’s tea export still faces problems such as low average export price,few international brands,single export market,and weak ability of market entities to deal with technical barriers to trade.Therefore,the analysis and summary of promotion measures for tea export taken by India and Japan is of great significance to the formulation of China’s tea export promotion policies.

Vice-President Liu Hongcai Meets Takami Kunio,Deputy Representative of GEN,Japan

On August 2nd,Vice-President Liu Hongcai met Takami Kunio,Deputy Representative of the Green Earth Network,Japan.The two sides exchanged views on China-Japan relations and people-to-topeople exchanges.

Discovering Africa as a Journalist

Li Xinfeng, a research fellow at the Chinese Academy of Social Scienc- es, served as the chief correspond- ent with the People＇s Daily in South Africa from 1998 to 2005. Li was in charge of the news coverage in the southern, eastern and central African regions and traveled across the continent, visiting over 20 AfrF can countries. His bookA Reporter＇s Exploration： Following Zheng He＇s Footsteps in Africa, marks China＇s first book on Zheng He＇s voyage to Africa, which filled the gap in the research on the history of Sino-African relations. Back in the 15th century, Zheng He, a famous Chinese admiral, sailed with his fleet as far as East Africa. Recently, Li spoke to ChinAfrica about his ex- periences in Africa as a journalist.

Discovering Sudan’s Beauty

Writers Wang Yan and Wu Fugui’s book guides Chinese readers through Sudan’s 25 states and districts as they witnessed them before the country’s split last year HOW much is actually known about arab states-particularly that of Sudan in North africa？ Looking closely at this question, it becomes clear that there is much still un

THE SEA IS NOT A SEWER ASEAN countries protested the release of Fukushima nuclear-contaminated water as Japan completed its first round of ocean dumping

A total of 7,788 tons of treated radioactive water had been discharged into the Pacific Ocean from Japan’s wrecked Fukushima Daiichi Nuclear Power Plant by September 11 in the first round of disposal as planned,said the plant operator Tokyo Electric Power Company(TEPCO),according to Japanese daily newspaper Sankei Shimbun.The second round of discharge scheduled for early October will release some 7,800 tons of nuclear-contaminated water.