The Review of Laser Engineering最新文献_第6页

Incorporation des sables concassés à différents taux de fillers dans la composition des bétons à très hautes performances : Comportement mécanique et Durabilité 在高性能混凝土的组成中加入不同填充率的碎砂:机械性能和耐久性

The Review of Laser Engineering Pub Date : 2016-12-27 DOI: 10.22453/LSJ-017.2.146165

Dalila Chiheb, Mebarek Belaoura, M. N. Oudjit, A. Bali

引用次数: 0

Comparative studies of self-compacting concrete made with different generations of superplasticizers 不同代高效减水剂配制自密实混凝土的比较研究

The Review of Laser Engineering Pub Date : 2016-12-27 DOI: 10.22453/LSJ-017.2.200216

R. Harkouss, B. Hamad

引用次数: 1

Antimicrobial activity and high thermostability of a novel BLIS secreted by Enterococcus Mundtii isolated from Lebanese cow’s milk 从黎巴嫩牛奶中分离的蒙蒂肠球菌分泌的新型BLIS的抗菌活性和高热稳定性

The Review of Laser Engineering Pub Date : 2016-12-27 DOI: 10.22453/LSJ-017.2.166176

I. Kassaa, Nancy Safourim, N. Mostafa, M. Hamzé

引用次数: 0

Assessment of The trophic state and Chlorophyll-a concentrations using Landsat OLI in Karaoun reservoir, Lebanon 利用Landsat OLI评价黎巴嫩Karaoun水库的营养状态和叶绿素a浓度

The Review of Laser Engineering Pub Date : 2016-12-27 DOI: 10.22453/LSJ-017.2.130145

A. Fadel, G. Faour, K. Slim

{"title":"Assessment of The trophic state and Chlorophyll-a concentrations using Landsat OLI in Karaoun reservoir, Lebanon","authors":"A. Fadel, G. Faour, K. Slim","doi":"10.22453/LSJ-017.2.130145","DOIUrl":"https://doi.org/10.22453/LSJ-017.2.130145","url":null,"abstract":"Fadel, A., Faour, G. and Slim K. 2016. Assessment of the trophic state and chlorophyll-a concentrations using Landsat OLI in Karaoun reservoir, Lebanon. Lebanese Science Journal, 17(2): 130-145. Harmful algal blooms have become a worldwide environmental problem. A regular and cost-effective monitoring of these blooms is highly needed by lakes managers. Satellite remote sensing imagery like Landsat Operational Land Imager (OLI) can be used to assess and monitor chlorophyll-a in water bodies over large areas in a cost-effective way. In this study, the accuracy of Landsat OLI to estimate chlorophyll-a was examined. Four field campaigns and cloud free images of Landsat OLI with 30 m resolution (01 May 2013, 21 August 2013, 10 July 2015, and 11 August 2015) were used in this study to determine the accuracy of Landsat OLI in estimating chlorophyll-a in a 12 km freshwater body, Karaoun reservoir. After atmospheric correction of these images, reflectance of single and multiple band combinations were compared to field chlorophyll-a data. Results of field campaigns showed that the trophic state of Karaoun reservoir is still eutrophic to hypereutrophic with high nutrient concentration and low phytoplankton biodiversity, dominated by cyanobacteria species, Microcystis aeruginosa and Aphanizomenon ovalisporum. On single band level, the in situ chlorophyll-a measurement correlated best with band 5 (0.85 0.88 μm), with R=0.75 and R=0.57. Highest correlation (R=0.84 and R=0.72) was obtained using band combination, B2:B4 band ratio multiplied by B5. Results indicated that Landsat OLI can be used effectively to determine chlorophyll-a concentration in lakes and reservoirs. We recommend the application of Landsat OLI as a satisfactory and cost effective method for monitoring chlorophyll-a in other lakes through-out the world.","PeriodicalId":308244,"journal":{"name":"The Review of Laser Engineering","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115961404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 22

Évolution spatio-temporelle des écosystèmes forestiers à pin D’Alep de L’Aurès oriental en Algérie 阿尔及利亚奥雷斯东部阿勒颇松森林生态系统的时空演化

The Review of Laser Engineering Pub Date : 2016-12-27 DOI: 10.22453/LSJ-017.2.104116

K. Garah, Chaouki Chafai, A. Bentouati

引用次数: 1

Detection of pathogenic bacteria in diarrheal stool collected from children in North Lebanon by using conventional stool culture and microarray technique « CLART® Enterobac » 采用传统粪便培养和“CLART®Enterobac”微阵列技术检测黎巴嫩北部儿童腹泻粪便中的致病菌

The Review of Laser Engineering Pub Date : 2016-12-01 DOI: 10.22453/LSJ-017.2.233239

Ranin Bechara, M. Hosny, Imad Al-Kassaa, F. Dabboussi, H. Mallat, M. Hamzé

引用次数: 2

Speeding Up the Calculation of Computer-Generated Holograms Using MATLAB 利用MATLAB加速计算机生成全息图的计算

The Review of Laser Engineering Pub Date : 2016-07-01 DOI: 10.2184/LSJ.44.7_458

A. Neo, T. Kakue, Yutaka Endo, T. Shimobaba, T. Ito

{"title":"Speeding Up the Calculation of Computer-Generated Holograms Using MATLAB","authors":"A. Neo, T. Kakue, Yutaka Endo, T. Shimobaba, T. Ito","doi":"10.2184/LSJ.44.7_458","DOIUrl":"https://doi.org/10.2184/LSJ.44.7_458","url":null,"abstract":"1.2 研究背景ホログラフィを用いた3次元表示システムの開発を行っている.本システムは3次元の物体を点群として捉えた物体情報をあらかじめ計算機内に保有し,計算機上でホログラムを生成し,表示デバイスを用いることで, 空間上に3次元物体像を得るシステムである(Fig. 2).ここで,物体情報は点群を構成する全ての点(物体点)の3次元座標から構成され,計算機上で生成するホログラムを計算機合成ホログラム(Computer Generated Hologram: CGH)という. 計算負荷の高いCGH生成を従来はC言語を用いたマルチスレッド処理やGPU(Graphics Processing Unit)処理を適用し,高速に計算していた. しかし,MATLABも2007年にマルチスレッド処理, We calculate computer-generated holograms (CGHs), whose calculation load is very heavy in MATLAB, which has abundant analysis functions. In this study, we developed four methods to speed up CGH calculation: (1) processing of point clouds as a matrix, (2) construction of a column-pixel matrix, (3) calculation of CGHs with GPU, and (4) construction of a row-pixel matrix. As a result, there was 453 times speeding up in comparison with that with the conventional method.","PeriodicalId":308244,"journal":{"name":"The Review of Laser Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125557531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A functional msbB acyltransferase of Photorhabdus luminescens, required for secondary lipid a acylation in gram-negative bacteria, confers resistance to anti-microbial peptides 革兰氏阴性菌中二级脂质A酰化所必需的发光光habus msbB酰基转移酶，赋予抗微生物肽的抗性

The Review of Laser Engineering Pub Date : 2016-06-27 DOI: 10.22453/LSJ-017.1.045056

Z. A. Khattar, S. Gaudriault, A. Givaudan

{"title":"A functional msbB acyltransferase of Photorhabdus luminescens, required for secondary lipid a acylation in gram-negative bacteria, confers resistance to anti-microbial peptides","authors":"Z. A. Khattar, S. Gaudriault, A. Givaudan","doi":"10.22453/LSJ-017.1.045056","DOIUrl":"https://doi.org/10.22453/LSJ-017.1.045056","url":null,"abstract":"Abi Khattar Z., S. Gaudriault and A. Givaudan. 2016. A functional msbB acyltransferase of Photorhabdus luminescens, required for secondary lipid a acylation in gram-negative bacteria, confers resistance to anti-microbial peptides. Lebanese Science Journal, 17(1): 45-56. Lipid A is a potent endotoxin, and its fatty acids (lauric, myristic, and sometimes palmitic acid) anchors lipopolysaccharide (LPS) into the outer leaflet of the outer membrane of most Gram-negative bacteria. The highly anionic charge of the glucosamine lipid A moiety makes the LPS a powerful attractant for cationic antimicrobial peptides (AMPs). AMPs are major component of innate immunity that kill bacteria by permeabilization of lipid bilayers. Secondary lipid A acylation of Klebsiella pneumoniae, involving the acyltransferase LpxM (formally, msbB or WaaN) that acylates (KDO)2-(lauroyl)-lipid IV-A with myristate during lipid A biosynthesis, has been associated with bacterial resistance to AMPs contributing to virulence in animal models. We investigated here the role of the msbB gene of the entomopathogenic bacterium Photorhabdus luminescens in AMP resistance, by functional complementation of the AMP susceptible K. pneumoniae lpxM mutant with the P. luminescens msbB gene. We showed that msbB (lpxM) gene of P. luminescens is able to enhance polymyxin B, colistin and cecropin A resistance of K. pneumoniae lpxM mutant, compared to the non-complemented mutant. However, we could not obtain any msbB mutant of Photorhabdus by performing allelic exchange experiments based on positive selection of sucrose highly resistant mutants. We thus suggest that msbB-mediated Photorhabdus lipid A acylation is essential for outer membrane low-permeability and that modification of lipid A composition, fluidity and osmosis-resistance have an important role in the ability of Photorhabdus to grow in sucrose at high concentrations.","PeriodicalId":308244,"journal":{"name":"The Review of Laser Engineering","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114717959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Activités biologiques des extraits aqueux de Pergularia tomentosa L. (Asclepiadaceae) 毛囊草(Pergularia tomentosa L.)水提取物的生物活性

The Review of Laser Engineering Pub Date : 2016-06-27 DOI: 10.22453/LSJ-017.1.037043

Imad Al Kassaa, Khaled El Omari, Marwa Saati, Bachar Ismail, M. Hamze

引用次数: 1

Étude du régime alimentaire de l’anchois européen (Engraulis encrasicolus) en Atlantique nord-est et en Méditerranée 东北大西洋和地中海欧洲凤尾鱼(Engraulis encrasicolus)的饮食研究

The Review of Laser Engineering Pub Date : 2016-06-27 DOI: 10.22453/LSJ-017.1.075090

Sharif Jemaa, Perrine Cuvilliers, M. Bacha, G. Khalaf, R. Amara

引用次数: 1