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Monitoring vegetation dynamics in East Rennell Island World Heritage Site using multi-sensor and multi-temporal remote sensing data

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International Journal of Digital Earth 2020年第3期13卷 393-409页

作者： Mengmeng Wang Guojin He natarajan ishwaran Tianhua Hong Andy Bell Zhaoming Zhang Guizhou Wang Meng Wang Institute of Remote Sensing and Digital Earth Chinese Academy of SciencesBeijingPeople’s Republic of China College of Resources and Environment University of Chinese Academy of SciencesBeijingPeople’s Republic of China The International Centre on Space Technologies for Natural and Cultural Heritage United Nations Educational Scientific and Cultural OrganizationBeijingPeople’s Republic of China LEEP Institute University of ExeterExeterDevonUK

East Rennell of Solomon Island is the first natural site under customary law to be inscribed on UNESCO’s World Heritage *** threats due to logging,mining and agriculture led to the site being declared a World Heritage in Danger in *** East Rennell World Heritage Site(ERWHS)to‘shed’its‘Danger’status the management must monitor forest cover both within and outside of *** used satellite data from multiple sources to track forest cover changes for the entire East Rennell island since 1998.95%of the island is still covered by undisturbed forests;annual average normalized difference vegetation index(NDVI)for the whole island was above 0.91 in ***,vegetation cover in the island has been slowly decreasing,at a rate of–0.0011 NDVI per year between 2000 and *** decrease less pronounced inside ERWHS compared to areas *** potential threats due to forest clearing outside ERWHS remain the forest cover change from 2000 to 2015 has been below 15%.We suggest ways in which the Government of Solomon Islands could use our data as well as unmanned air vehicles and field surveys to monitor forest cover change and ensure the future conservation of ERWHS.

关键词： East Rennell World Heritage Site(ERWHS) vegetation cover forest cover dynamic monitoring multi-sources remote sensing data

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The Digital Belt and Road program in support of regional sustainability

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International Journal of Digital Earth 2018年第7期11卷 657-669页

作者： Huadong Guo Jie Liu Yubao Qiu Massimo Menenti Fang Chen Paul F.Uhlir Li Zhang John van Genderen Dong Liang ishwaran natarajan Lanwei Zhu Jiuliang Liu Institute of Remote Sensing and Digital Earth Chinese Academy of SciencesBeijingPeople’s Republic of China Department of Geoscience and Remote Sensing Delft University of TechnologyDelftNetherlands Department of Earth Observation Science University of TwenteEnschedeNetherlands College of Resources and Environment University of Chinese Academy of SciencesBeijingPeople’s Republic of China College of Geospatial Information Science and Technology Capital Normal UniversityBeijingPeople’s Republic of China Information Policy and Management CallicoonNYUSA

The Belt and Road initiative has a significant focus on infrastructure,trade,and economic development across a vast region,and it also provides significant opportunities for sustainable *** combined pressure of climate variability,intensified use of resources,and the fragility of ecosystems make it very challenging,however,to achieve future *** develop the path in a sustainable way,it is important to have a comprehensive understanding of these issues across nations and evaluate them in a scientific and well-informed *** this context,the Digital Belt and Road(DBAR)program was initiated as an international venture to share expertise,knowledge,technologies,and data to demonstrate the role of Earth observation science and technology and big Earth data applications to support large-scale *** this paper,we identify pressing challenges,present the research priorities and foci of the DBAR program,and propose solutions where big Earth data can make significant *** paper calls for further joint actions and collaboration to build a digital silk road in support of sustainable development at national,regional and global levels.

关键词： Digital Belt and Road program(DBAR) big Earth data Earth observation research data international cooperation sustainable development goals(SDGs)

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Protist and Plant Growth-Promoting Bacterium Interaction Alters GH3-2 Expression and Enhances Nutrient Content in Rice

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Rice science 2024年第2期31卷 134-138,I0017-I0019页

作者： Komal A.CHANDARANA natarajan AMARESAN C.G.Bhakta Institute of Biotechnology UkaTarsadia UniversityMaliba CampusBardoliSurat 394350GujaratIndia

The present study aimed to assess the interactive effects of four plant growth-promoting bacterium(PGPB)species[Providencia sp.(Pr),Stenotrophomonas sp.(St),Morganella sp.(Mo),and Lysinibacillus sp.(Lb)]and six protist species[two amoebae Vermamoeba vermiformis(A9)and Acanthamoeba genotype T4(A34),and four ciliates Crytolophosis mucicola(C1),Tetrahymena sp.(C2),Colpoda elliotti(C12),and an unidentified genus of the family Kreyellidae(C5)]on the uptake of nutrients and the expression of auxin-responsive gene(GH3-2)in *** findings revealed that rice seedlings grew healthily,and a statistically significant difference was observed after 30 d of incubation in pots under greenhouse conditions treated with each PGPB and protist-PGPB consortia,compared with the untreated control ***,the protist-PGPB treatments were more significant than PGPB treatment *** greatest improvement in rice seedling growth was observed in *** with Stenotrophomonas sp.(C12St)treatment,showing increased root and shoot length(88.57%and 79.69%).

关键词： seedling Plant GH3

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Advancements and applications of position-sensitive detector(PSD): a review

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Optoelectronics Letters 2024年第6期20卷 330-338页

作者： Shaher Dwik G.Sasikala S.natarajan Department of Electronics&Communication Engineering School of Electrical&CommunicationVel Tech Rangarajan Dr.Sagunthala R&D Institute of Science and TechnologyChennai 600062India Department of Computer Science and Engineering Amrita School of ComputingAmrita Vishwa VidyapeethamChennai 601103India1

This paper presents a review of the position-sensitive detector(PSD) sensor, covering different types of PSD and recent works related to this field. Furthermore, it explains the theoretical concepts and provides information about its structure and principles of operation. Moreover, it includes the main information about the available commercial PSDs from different companies, along with a comparison between the common modules. The PSD features include high position resolution, fast response, and a wide dynamic range. These features make it suitable for various fields and applications, such as imaging, spectrometry, spectroscopy and others.

关键词： Advancements and applications of position-sensitive detector a review PSD

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An artificial neural network based deep collocation method for the solution of transient linear and nonlinear partial differential equations

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Frontiers of Structural and Civil Engineering 2024年第8期18卷 1296-1310页

作者： Abhishek MISHRA Cosmin ANITESCU Pattabhi Ramaiah BUDARAPU Sundararajan natarajan Pandu Rang VUNDAVILLI Timon RABCZUK School of Mechanical Sciences Indian Institute of TechnologyBhubaneswar 752050India Institute of Structural Mechanics Bauhaus University of WeimarWeimar 99423Germany Department of Mechanical Engineering Indian Institute of Technology MadrasChennai 600036India

A combined deep machine learning(DML)and collocation based approach to solve the partial differential equations using artificial neural networks is *** developed method is applied to solve problems governed by the Sine–Gordon equation(SGE),the scalar wave equation and *** methods are studied:one is a space-time formulation and the other is a semi-discrete method based on an implicit Runge–Kutta(RK)time *** methodology is implemented using the Tensorflow framework and it is tested on several numerical *** on the results,the relative normalized error was observed to be less than 5%in all cases.

关键词： collocation method artificial neural networks deep machine learning Sine-Gordon equation transient wave equation dynamic scalar and elasto-dynamic equation Runge-Kutta method

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Mesenchymal stem cell-based TRAIL delivery inhibits the metastatic state of clinical therapy-resistant progressive neuroblastoma

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World Journal of Pediatrics 2024年第3期20卷 287-293页

作者： Dinesh Babu Somasundaram Andrew Maher Sheeja Aravindan Zhongxin Yu Brian MBesch natarajan Aravindan Department of Radiation Oncology University of Oklahoma Health Sciences CenterOklahoma CityOKUSA Stephenson Cancer Center Oklahoma CityOKUSA Department of Pathology University of Oklahoma Health Sciences CenterOklahoma CityOKUSA Radiation Biology Laboratory University of Oklahoma Health Sciences CenterBSEB 302F941 Stanton L.Young BoulevardOklahoma CityOK 73104USA

Progressive neuroblastomas(pNBs)that defy current intensive multimodal clinical therapy(IMCT)are a significant contributor to overall childhood cancer deaths[l].Neuroblastomas(NBs)that survive first-line IMCT actively evolve to acquire genetic and molecular rearrangements and display unparalleled plasticity and evolution,which causes frequent relapses in a rapidly accelerating timeline[2-4].

关键词： neuroblastoma clinical evolve

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联合国教科文组织“人与生物圈”计划40周年全球回顾与展望

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人与生物圈 2011年第3期 6-11页

作者： natarajan ishwaran 陈向军先义杰王瑾联合国教科文组织地球科学与生态科学处人与生物圈计划国际秘书处

2011年是联合国教科文组织提出并实施“人与生物圈”计划40周年，中国人与生物圈国家委员会将举行各种庆祝活动，出版《人与生物圈》杂志系列特别纪念专辑是其中之一。为了让读者更好地更深入地了解这一项伟大的全球性政府间科学计划，... 详细信息

2011年是联合国教科文组织提出并实施“人与生物圈”计划40周年，中国人与生物圈国家委员会将举行各种庆祝活动，出版《人与生物圈》杂志系列特别纪念专辑是其中之一。为了让读者更好地更深入地了解这一项伟大的全球性政府间科学计划，本刊记者专门采访了联合国教科文组织地球科学与生态科学处处长兼人与生物圈计划国际秘书处秘书长natarajanishwaran先生（简称ishwaran）。

关键词：联合国教科文组织人与生物圈计划展望庆祝活动科学计划生态科学地球科学委员会

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基于自适应双相场模型的纤维增强复合材料单层板断裂性能

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复合材料学报 2024年第3期41卷 1505-1515页

作者：郭雯马玉娥 Sundar natarajan 陈鹏程彭帆西北工业大学航空学院西安710072 Indian Institute of Technology Madras School of Mechanical EngineeringChennai 600036 长安大学理学院西安710064

相场法可以自动捕捉裂纹的萌生和演化,因此在模拟复合材料的复杂失效行为时具有明显优势。为区分纤维增强复合材料(Fiber-reinforced composites,FRC)中存在的不同断裂模式,采用双相场断裂模型来分别表征基体和纤维的损伤演化。同时采... 详细信息

相场法可以自动捕捉裂纹的萌生和演化,因此在模拟复合材料的复杂失效行为时具有明显优势。为区分纤维增强复合材料(Fiber-reinforced composites,FRC)中存在的不同断裂模式,采用双相场断裂模型来分别表征基体和纤维的损伤演化。同时采用相场变量作为误差指标,在各向异性的双相场模型中引入了基于四叉树分解的网格自适应细化策略。设计并开发了相应的Matlab程序,研究了单向及变刚度纤维增强复合材料单层板在拉伸位移载荷下的断裂行为。计算结果表明:采用基于自适应算法的各向异性双相场模型所得到的数值计算结果与试验结果吻合良好;自适应双相场模型能在保证较高计算精度的同时,配合序参量的演化准确地在裂纹路径上进行网格自动加密,简化网格前处理过程,减少网格数量,降低计算成本,提高计算效率。

关键词：纤维增强复合材料双相场各向异性自适应有限元

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热带森林生物多样性与世界遗产公约

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AMBIO－人类环境杂志 2000年第6期29卷 302-309页

作者： Jeffrey Sayer natarajan ishwaran James Thorsell Todd Sigaty 傅国斌 Center for International Forestry Research/CIFOR P.O.Box 6596 JKPWB Jakarta Indonesia。cgiar. org 世界文化遗产中心 IUCN The World Conservation Union Rue Mauverney 28 CH-1196 Gland Switzerland。

《世界遗产公约》已由158个国家批准认可,它对全球具有文化和自然价值的场址的保护起着一个国际法规的作用。33处热带森林能被列入此公约的主要原因在于它们的全球生物多样性价值。这一系列场址成为全球生物多样性的精华之一,它约占全... 详细信息

《世界遗产公约》已由158个国家批准认可,它对全球具有文化和自然价值的场址的保护起着一个国际法规的作用。33处热带森林能被列入此公约的主要原因在于它们的全球生物多样性价值。这一系列场址成为全球生物多样性的精华之一,它约占全世界郁闭的热带森林的2.5%,对世界陆地生物多样性的保护作着重要贡献。虽然一系列的国际行动都将最终为森林的保护和可持续管理提供一个基本框架,但是《世界遗产公约》在当前提供了一个迅速调动就能起到保护大多数重要森林的机制。在过去,如果一个场址被认为很少受到人类活动的影响,它往往就被列入公约。然而,任何森林都有人类的足迹,同时我们也认为人类的活动应该与其维持全球生物多样性价值相一致。如果此公约能够更加直接地涉及人类活动对森林影响的普遍性事实,那么它就可以发挥更大的作用。为此,我们可采用更加适宜的以客观标准和指标为基础的管理方式,来确定其变化的阈限和引发管理响应,达到预期的发展多样性的目的。我们断定世界遗产中热带森林的最佳数量可以达到100个场址或场址群,这样的一个网络可以有效地保护世界森林生物多样性的绝大多数。目前世界热带森林的消耗速率敦促紧急的国际活动来确立一批优先保护的场址,而世界遗产保护区可以为此类活动提供最好的基本结构。

关键词：热带森林生物多样性世界遗产公约森林保护

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Building an Ecological Civilization in China： Towards a Practice Based Learning Approach

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Journal of Earth Science and Engineering 2015年第6期5卷 349-362页

作者： natarajan ishwaran Tianhua Hong Zhijun Yi International Centre on Space Technologies for Natural and Cultural Heritage under the Auspices of UNESCO Institute ofRemote Sensing and Digital Earth Beo'ing 100094 China Science and Communications Permanent Delegation of China to UNESCO UNESCO Paris 75015 France

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