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Kshitij Tiwari,Valentin Honore,Sungmoon Jeong,Nak Young Chong,Marc Peter Deisenroth 제어로봇시스템학회 2016 제어로봇시스템학회 국제학술대회 논문집 Vol.2016 No.10
We consider the problem of area coverage for robot teams operating under resource constraints, while modeling spatio-temporal environmental phenomena. The aim of the mobile robot team is to avoid exhaustive search and only visit the most important locations that can improve the prediction accuracy of a spatio-temporal model. We use a Gaussian Process (GP) to model spatially varying and temporally evolving dynamics of the target phenomenon. Each robot of the team is allocated a dedicated search area wherein the robot autonomously optimizes its prediction accuracy. We present this as a Decentralized Computation and Centralized Data Fusion approach wherein the trajectory sampled by the robot is generated using our proposed Resource-Constrained Decentralized Active Sensing (RC-DAS). Since each robot possesses its own independent prediction model, at the end of robot’s mission time, we fuse all the prediction models from all robots to have a global model of the spatio-temporal phenomenon. Previously, all robots and GPs needed to be synchronized, such that the GPs can be jointly trained. However, doing so defeats the purpose of a fully decentralized mobile robot team. Thus, we allow the robots to independently gather new measurements and update their model parameters irrespective of other members of the team. To evaluate the performance of our model, we compare the trajectory traced by the robot using active and passive (e.g., nearest neighbor selection) sensing. We compare the performance and cost incurred by a resource constrained optimization with the unconstrained entropy maximization version.
Dynamically Modified Silica and its Applications in Drug Control and Drug Metabolism Studies
Per Helboe,Mogens Thomsen,Steen Honore Hansen 한국생약학회 1988 생약학회지 Vol.19 No.4
An alternative to the well known reversed-phase separations on chemically-bonded phases has been developed. The approach is based on a dynamic modification of bare silica with long chain quaternary ammonium ions. The influence of the concentration and type of quaternary ammonium ion, the pH value and the ionic strength of the eluent on the selectivity towards test solutes has been investigated. The large number of parameters that can be varied in the system offers numerous possibilities by which a desired selectivity can be attained. Once established, a high degree of reproducibility of the selectivity between solutes is obtained even when using different brands of silica; this is in contrast to the situation when using chemically-bonded phases, such as, for example, different brands of octadecylsilyl-bonded silica materials. Examples of the use of the system in pharmaceutical analysis and drug metabolism studies are given.
Numerical Simulation of Methane Slip in Dual Fuel Marine Engines
Jaehyun Han(한재현),Michael Vincent Jensen,Kar Mun Pang,Jens Honore Walther,Jesper Schramm,Choongsik Bae(배충식) 대한기계학회 2017 대한기계학회 춘추학술대회 Vol.2017 No.11
The methane slip is the problematic issue for the engines using natural gas(NG). Because methane is more powerful greenhouse gas (GHG) than CO₂, understanding of the methane slip during gas exchange process of the engines is essential. In this study, the influence of the gas pipe geometry and the valve timings on the methane slip was investigated. MAN L28/32DF engine was modeled to simulate the gas exchange process of the four stroke NG-diesel dual fuel engines. The mesh size of the model was decided based on the sensitivity study on the peak pressure of the cylinder and the fuel mass estimations. The simulations with various gas pipe geometries were conducted. It seemed that the effect of the change in injection direction is more dominant than the change in the gas hole configuration. The favorable injection direction for minimum amount of methane slip was discovered as the direction which helps developing the flow of methane far from the exhaust ports. The effects of various valve tuning settings were also simulated. The advancement of the exhaust valve closing was more efficient than the retardation of the intake valve opening. A little retardation of the intake valve opening even resulted in the increase of the amount of methane slip.
Real-time modeling prediction for excavation behavior
Ni, Li-Feng,Li, Ai-Qun,Liu, Fu-Yi,Yin, Honore,Wu, J.R. Techno-Press 2003 Structural Engineering and Mechanics, An Int'l Jou Vol.16 No.6
Two real-time modeling prediction (RMP) schemes are presented in this paper for analyzing the behavior of deep excavations during construction. The first RMP scheme is developed from the traditional AR(p) model. The second is based on the simplified Elman-style recurrent neural networks. An on-line learning algorithm is introduced to describe the dynamic behavior of deep excavations. As a case study, in-situ measurements of an excavation were recorded and the measured data were used to verify the reliability of the two schemes. They proved to be both effective and convenient for predicting the behavior of deep excavations during construction. It is shown through the case study that the RMP scheme based on the neural network is more accurate than that based on the traditional AR(p) model.
From Genome-Based In Silico Predictions to Ex Vivo Verification of Leprosy Diagnosis
Geluk, Annemieke,Spencer, John S.,Bobosha, Kidist,Pessolani, Maria C. V.,Pereira, Geraldo M. B.,Banu, Sayera,Honoré,, Nadine,Reece, Stephen T.,MacDonald, Murdo,Sapkota, Bishwa Raj,Ranjit, Chaman American Society for Microbiology 2009 CLINICAL AND VACCINE IMMUNOLOGY Vol.16 No.3
<B>ABSTRACT</B><P>The detection of hundreds of thousands of new cases of leprosy every year suggests that transmission of <I>Mycobacterium leprae</I> infection still continues. Unfortunately, tools for identification of asymptomatic disease and/or early-stage <I>M. leprae</I> infection (likely sources of transmission) are lacking. The recent identification of <I>M. leprae</I>-unique genes has allowed the analysis of human T-cell responses to novel <I>M. leprae</I> antigens. Antigens with the most-promising diagnostic potential were tested for their ability to induce cytokine secretion by using peripheral blood mononuclear cells from leprosy patients and controls in five different areas where leprosy is endemic; 246 individuals from Brazil, Nepal, Bangladesh, Pakistan, and Ethiopia were analyzed for gamma interferon responses to five recombinant proteins (ML1989, ML1990, ML2283, ML2346, and ML2567) and 22 synthetic peptides. Of these, the <I>M. leprae</I>-unique protein ML1989 was the most frequently recognized and ML2283 the most specific for <I>M. leprae</I> infection/exposure, as only a limited number of tuberculosis patients responded to this antigen. However, all proteins were recognized by a significant number of controls in areas of endemicity. T-cell responses correlated with in vitro response to <I>M. leprae</I>, suggesting that healthy controls in areas where leprosy is endemic are exposed to <I>M. leprae</I>. Importantly, 50% of the healthy household contacts and 59% of the controls in areas of endemicity had no detectable immunoglobulin M antibodies to <I>M. leprae</I>-specific PGL-I but responded in T-cell assays to ≥1 <I>M. leprae</I> protein. T-cell responses specific for leprosy patients and healthy household contacts were observed for ML2283- and ML0126-derived peptides, indicating that <I>M. leprae</I> peptides hold potential as diagnostic tools. Future work should concentrate on the development of a sensitive and field-friendly assay and identification of additional peptides and proteins that can induce <I>M. leprae</I>-specific T-cell responses.</P>
MC Machon-Honoré 세계섬학회 2021 World Environment and Island Studies Vol.11 No.3
This paper is based on the presentation I made for the online conference as part of Peace Talks series in Paris, June 10, 2021 and as a follow up to the 2021 World Peace Island Forum: 6+1 Culture Forum in Jeju. A blending conference on Education, Peace, Sustainable Development and process of designation of Jeju 4.3 Victim Records as UNESCO World Program of Memory MoW. This is constructed from my perspective as Doctor in anglophone studies and gender and development studies, main IFBPW representative to UNESCO, member of the NGO-UNESCO Liaison Committee and the CCNGO-Education2030 coordination group, UNESCO key mechanism for reflection, dialogue and partnerships for the implementation of SDG4.
Bernadette Gblossi Goualié,Honoré Gnenequidou Ouattara,Eric Essoh Akpa,Nathalie kouadio Guessends,Souleymane Bakayoko,Sébastien Lamine Niamké,Mireille Dosso 한국식품과학회 2014 Food Science and Biotechnology Vol.23 No.4
The level of antibiotic multiresistance ofCampylobacter strains from chicken was evaluated andresponses to the bactericidal effects of organic acids wereanalyzed. Strains (76) isolated from chicken were analyzedfor resistance to antibiotics and acid shock. A high strainresistance to fluoroquinolones (ciprofloxacin and nalidixicacid) was observed, with cross resistance to both drugs in41% of strains. A low resistance was observed for amoxicillin,erythromycin, and gentamicin. Campylobacter jejuni wasthe most resistant species. Antibacterial activities againstmultiresistant Campylobacter strains were observed usingacetic, citric, and ascorbic acids at minimum bactericidalconcentrations (MBC) ranging from 0.3 to 3 mg/mL. Acetic acid was the most efficient acid with the lowestMBC value. However, a contact time of 4 h was requiredfor an efficient effect against Campylobacter contaminatedchicken skin. Using organic acids in the poultry productionchain can reduce propagation of antibiotic multiresistantstrains of Campylobacter.
Rajagopal Karthikeyan,Kingni Sifeu Takougang,Kom Guillaume Honoré,Pham Viet-Thanh,Karthikeyan Anitha,Jafari Sajad 한국물리학회 2020 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.77 No.2
A chaotic simple jerk system (SJS) that belongs to systems with self-excited and hidden attractors is introduced in this paper. The dynamics of the proposed SJS is analytically and numerically investigated. Interestingly, the influence of the time delay on the proposed chaotic SJS is studied. In addition, the physical existence of self-excited and hidden chaotic attractors found in the proposed SJS and in the time-delayed form of SJSs (TDSJSs) are verified by using Orcard-PSpice software. Finally, chaos synchronization of identical, unidirectional, coupled, proposed chaotic TDSJSs is also reported.
Nkemgha Guivis Zeufack,Engone Mve Symphorien,Oumbé Honoré Tekam,Belek Alim 한국국제경제학회 2024 International Economic Journal Vol.38 No.1
This paper contributes to the literature on the relationship between industrialization and environmental quality. Despite an abundant literature on the subject, existing studies have not yet investigated the role of environmental policy stringency in the transmission of the effects of industrialization on environmental quality. This study uses a panel of 24 countries in sub-Saharan Africa (SSA) with data covering the period 2000–2020. The use of the systemGMMmethodology shows that industrialization – measured by – the value added of industry and the value added of manufacturing – significantly deteriorates the quality of the environment. However, the introduction of the environmental policy stringency variable as a transmission channel produces a detrimental effect of industrialization on CO2 emissions up to thresholds of 37.33 and 37 respectively for the industrial sector and the manufacturing sector. For an environmental policy stringency above these thresholds, industrialization significantly reduces CO2 emissions. Finally, we found the Environmental Kuznets Curve between economic growth and CO2 emissions. Thus, a strengthening of environmental policy can help these countries to develop a virtuous relationship between industrialization and the quality of the environment.