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Dynamic Frontier-Led Swarming:Multi-Robot Repeated Coverage in Dynamic Environments

IEEE/CAA Journal of Automatica Sinica 2023年第3期10卷 646-661页

作者： Vu phi tran Matthew A.Garratt Kathryn Kasmarik Sreenatha G.Anavatti School of Engineering and Information Technology University of New South WalesCanberraAustralian Capital Territory 2612Australia IEEE

A common assumption of coverage path planning research is a static *** environments require only a single visit to each area to achieve ***,some real-world environments are characterised by the presence of unexpected,dynamic *** require areas to be revisited periodically to maintain an accurate coverage map,as well as reactive obstacle *** paper proposes a novel swarmbased control algorithm for multi-robot exploration and repeated coverage in environments with unknown,dynamic *** algorithm combines two elements:frontier-led swarming for driving exploration by a group of robots,and pheromone-based stigmergy for controlling repeated coverage while avoiding *** tested the performance of our approach on heterogeneous and homogeneous groups of mobile robots in different *** measure both repeated coverage performance and obstacle avoidance *** a series of comparison experiments,we demonstrate that our proposed strategy has superior performance to recently presented multi-robot repeated coverage methodologies.

关键词： Artificial pheromones distributed control architecture dynamic obstacle avoidance multi-robot coverage stigmergy swarm robotics

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Mosquito Control, Killing off the Females

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Open Journal of Animal Sciences 2024年第1期14卷 14-22页

作者： phi tran School of Liberal Art University of St. Thomas of Houston Houston USA

In addition to causing discomfort, female mosquitoes introduce disease-carrying viruses and bacteria into the bloodstream of their victims. There are numerous publications describing the uses of sugary mosquito baits with promising results. Without temperature control measures however, these methods are mainly useful for only nectar-feeding insects, including male mosquitoes, because the warmth of the blood is a condition for the females to locate their meals. The efforts required to keep the baits fresh against the natural spoiling process make them less attractive or impractical to implement. These experiments address these issues by using warm baits of water, sugar, boric acid, and antibiotics. Overnight, the general areas became clear of blood-sucking female mosquitoes while in numbers, the harmless males concentrated into the immediate vicinities. Control vs. experiment protocol established no other logical explanation for this phenomenon other than that females were attracted and killed by the bait. As expected, there was no female mosquito’s activity in these areas. There weren’t many left to do the work.

关键词： Mosquitoes Malaria Dengue Control Toxic Sugar Bait ATSB Samples

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Anti-inflammatory effects of alkaloid enriched extract from roots of Eurycoma longifolia Jack

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Asian Pacific Journal of Tropical Biomedicine 2019年第1期9卷 18-23页

作者： Dao Thi Thanh Hien tran phi Long tran Phuong Thao Jeong-Hyung Lee Duong Thu trang Nguyen Thi Thu Minh Pham Van Cuong Do Thi Ngoc Lan Nguyen Hai Dang Nguyen Tien Dat Deparment of Traditional Pharmacy Hanoi University of Pharmacy Department of Biochemistry College of Natural Sciences Kangwon National University Advanced Center for Bio-organic Chemistry Institute of Marine Biochemistry Vietnam Academy of Science and Technology National Institute of Drug Quality Control Center for Research and Technology transfers

Objective: To examine the in vitro and in vivo anti-inflammatory effects of the alkaloid enriched extract(ELA) from the roots of Eurycoma longifolia. Methods: The in vitro antiinflammatory effects of ELA were evaluated by examining its inhibitory activities against nitric oxide(NO) production and inducible nitric oxide synthase(iN OS) and cyclooxygenase2(COX-2) expressions in lipopolysaccharide(LPS)-stimulated RAW264.7 cells. The level of NO produced in the culture media was determined by Griess method. The i NOS and COX-2 protein expressions were analyzed by Western blot. The in vivo effect of ELA was evaluated on LPS-induced septic shock in mice model. Mice mortality was monitored for5 days after injection of LPS. The chemical contents of the ELA were determined by using various chromatographic and spectroscopic techniques. Results: The ELA was found to exhibit a significant anti-inflammatory effect in both in vitro and in vivo models. The results demonstrated that ELA dose-dependently inhibited LPS-induced NO production as well as the protein iN OS and COX-2 expressions. In the septic shock model, ELA dose-dependently protected mice from LPS-induced mortality. Further study on the isolated components of ELA indicated that 9,10-dimethoxycanthin-6-one may contribute significantly to the antiinflammatory effects of the extract. Conclusions: These results suggest that ELA exhibits the anti-inflammatory activity via suppression of pro-inflammatory mediators such as NO, iN OS,and COX-2 and protects mice from LPS-induced mortality in septic shock model.

关键词： Eurycoma longifolia Anti-inflammation Alkaloid 9,10-dimethoxycanthin-6-one

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Kriging-based reliability analysis of the long-term stability of a deep driftconstructed in the Callovo-Oxfordian claystone

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Journal of Rock Mechanics and Geotechnical Engineering 2021年第5期13卷 1033-1046页

作者： Ngoc-Tuyen tran Duc-phi Do Dashnor Hoxha Minh-Ngoc Vu Gilles Armand Univ.Orléans Univ.ToursINSA CVLLaméEA 7494France Andra R&D Division92298Chatenay-MalabryFrance

Callovo-Oxfordian(COx)claystone has been considered as a potential host rock for geological radioactive waste disposal in France(Cigéo project).During the exploitation phase(100 years),the stability of drifts(***/alveoli)within the disposal is assured by the liner,which includes two layers:concrete arch segment and compressible *** latter exhibits a significant deformation capacity(about 50%)under low stress(<3 MPa).Although the response of these underground structures can be governed by complex thermo-hydro-mechanical coupling,the creep behavior of COx claystone has been considered as the main factor controlling the increase of stress state in the concrete liner and hence the long-term stability of ***,by focusing only on the purely mechanical behavior,this study aims at investigating the uncertainty effect of the COx claystone time-dependent properties on the stability of an alveolus of Cigéo during the exploitation *** describe the creep behavior of COx claystone,we use Lemaitre’s viscoplastic model with three parameters whose uncertainties are identified from laboratory creep *** the reliability analysis,an extension of a well-known Kriging metamodeling technique is proposed to assess the exceedance probability of acceptable stress in the concrete liner of the *** open-source code Code_Aster is chosen for the direct numerical evaluations of the performance *** Kriging-based reliability analysis elucidates the effect of the uncertainty of COx claystone on the long-term stability of the concrete ***,the role of the compressible material layer between the concrete liner and the host rock is also highlighted.

关键词： Reliability analysis Kriging metamodeling Time-dependent behavior Compressible material Callovo-Oxfordian(COx)claystone Long-term stability

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Phytochemical Constituents and Determination of Resveratrol from the Roots of <i>Arachis hypogea</i>L.

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American Journal of Plant Sciences 2013年第12期4卷 2351-2358页

作者： Tuyen Pham Nguyen Kim Nga Vo Thi Phuong tran Van Phuong Quach Ngo Diem Duong Ngo Thi Thuy Quang Ton That Phung Nguyen Kim phi Department of Chemical Technology Faculty of Chemical-Food Technology University of Technical Education Ho Chi Minh City Ho Chi Minh City Vietnam Department of Organic Chemistry Faculty of Chemistry University of Science Vietnam National University-Ho Chi Minh City Ho Chi Minh City Vietnam Department of Plant Biotech and Biotransformation Faculty of Biology University of Science Vietnam National University-Ho Chi Minh City Ho Chi Minh City Vietnam Faculty of Environmental Science Sai Gon University Ho Chi Minh City Vietnam

Two triterpenoid saponins, 6, 7, together with five known compounds were isolated from the roots of Arachis hypogea L. collected in Vietnam. Their structures were established by spectroscopic analysis (1D, 2D NMR and HRMS) as well as by comparison with those reported in the literature. Furthermore, the high content of resveratrol in the roots opens a new potential resource for pharmaceutical companies to prepare medicines from the wasted peanut roots.

关键词： Arachis hypogea L. Peanut Resveratrol Triterpenoid Glycoside

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唤醒空间!城市生态阳台,河内,越南

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世界建筑 2020年第10期 100-105,136页

作者：无 An Viet Dung Roberto Iannetti Pham Ngoc Linh An Thanh Nhan Nelly Agliardi Quach Hai Linh Bui Huu Tung Le Van Tung Do Thi Hien Nguyen phi Hung Due Chu Bang Thanh 天妮(译) Nguyen Thai Thach(摄影) Quang tran(摄影) 耕种建筑师事务所不详

我们是来自越南及意大利的青年建筑师团队,在越南开设了一家建筑工作室。2016年10月,我们在河内租赁了一个办公空间。在了解河内市周边环境后,我们发现,可能由于市区里的灰尘、噪音和防盗等问题,这里有很多阳台都未被实际使用。市民几... 详细信息

我们是来自越南及意大利的青年建筑师团队,在越南开设了一家建筑工作室。2016年10月,我们在河内租赁了一个办公空间。在了解河内市周边环境后,我们发现,可能由于市区里的灰尘、噪音和防盗等问题,这里有很多阳台都未被实际使用。市民几乎不与外部环境或附近的邻居互动。我们把那些阳台称为沉寂空间。

关键词：青年建筑师办公空间建筑工作室阳台河内外部环境越南

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