2009 4th International Conference on Recent Advances in Space Technologies最新文献

Modeling and simulation of a cubesat using nonlinear control in an elliptic orbit 基于椭圆轨道非线性控制的立方体卫星建模与仿真

2009 4th International Conference on Recent Advances in Space Technologies Pub Date : 2009-06-11 DOI: 10.1109/RAST.2009.5158269

R. Schlanbusch, E. Oland, P. J. Nicklasson

引用次数: 5

Fuzzy logic analysis of flood disaster monitoring and assessment of damage in SE Anatolia Turkey 土耳其安纳托利亚东南部洪涝灾害监测与损失评估的模糊逻辑分析

2009 4th International Conference on Recent Advances in Space Technologies Pub Date : 2009-06-11 DOI: 10.1109/RAST.2009.5158182

H. Bayraktar, B. Bayram

{"title":"Fuzzy logic analysis of flood disaster monitoring and assessment of damage in SE Anatolia Turkey","authors":"H. Bayraktar, B. Bayram","doi":"10.1109/RAST.2009.5158182","DOIUrl":"https://doi.org/10.1109/RAST.2009.5158182","url":null,"abstract":"Southeast Anatolia Region was subject to a large flood disaster whose severity is expected only once each 100 years in November 2006. Several people died or injured after a very heavy rain fell which outlast nearly 3 hours. Nonetheless government made a strong effort to interfere the casualties. Before and after images of TERRA/ASTER satellite were used to analyse the effects of the disaster. Before image was gathered on May and after image was gathered on November. November image was registered onto May image with a very accurate rectification process in spite of a huge seasonal difference. Land use and land cover classification using an object oriented method has been performed on the study area. VNIR, SWIR and TIR bands of both satellite images were included in classification process. Fuzzy image segmentation was attempted using scale parameters of 5, 10, 20 and 30 on both images. Pre-flood and post-flood classification results were fulfilled according to the scale parameter of “5”. Even though the date of the post-flood image 4 days after the flood, affected regions were determined by courtesy of object oriented fuzzy classification process.","PeriodicalId":412236,"journal":{"name":"2009 4th International Conference on Recent Advances in Space Technologies","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126001374","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: 10

Edge detection in remote sensing images via lattice filters based subband decomposition 基于子带分解的栅格滤波器遥感图像边缘检测

2009 4th International Conference on Recent Advances in Space Technologies Pub Date : 2009-06-11 DOI: 10.1109/RAST.2009.5158241

N. H. Kaplan, I. Erer, S. Kent

引用次数: 2

Supersonic flutter prediction of functionally graded panel 功能梯度板的超音速颤振预测

2009 4th International Conference on Recent Advances in Space Technologies Pub Date : 2009-06-11 DOI: 10.1109/RAST.2009.5158184

Merve Melek, M. O. Kaya

引用次数: 2

Substitution effects on orbital ordering and multiferroicity in some perovskite-like candidates for advanced functional materials 取代效应对一些类似钙钛矿的高级功能材料的轨道有序性和多铁性

2009 4th International Conference on Recent Advances in Space Technologies Pub Date : 2009-06-11 DOI: 10.1109/RAST.2009.5158178

K. Krezhov

{"title":"Substitution effects on orbital ordering and multiferroicity in some perovskite-like candidates for advanced functional materials","authors":"K. Krezhov","doi":"10.1109/RAST.2009.5158178","DOIUrl":"https://doi.org/10.1109/RAST.2009.5158178","url":null,"abstract":"Substitution is a feasible means in designing novel functional materials with perovskite-like structure. Both A- and B- sites of the perovskite structure could be affected. We show that the magnetic interactions and other electronic properties of important materials such as colossal magnetoresistive (CMR) hexagonal double perovskites and manganates, or multiferroic RMn<inf>2</inf>O<inf>5</inf> (R=rare earth metal) could be influenced but to understand why the compound does not display the expected properties calls for detailed information on microscopic level. Indeed, unlike ferromagnetic and half metallic Sr<inf>2</inf>FeMoO<inf>6</inf>, which is a paradigmatic CMR compound, lack of long-range magnetic ordering and spin glass behavior was established in Ba<inf>2</inf>MSbO<inf>6</inf> (M=Fe, Co) due to a significant antisite disorder. In the parent charge ordered Bi<inf>0.5</inf>A<inf>0.5</inf>Fe<inf>x</inf>Mn<inf>1-x</inf>O<inf>3</inf> (A=Ca, Sr) substitution with Fe<sup>3+</sup> for Mn<sup>3+</sup> destroyed the charge order known to hamper CMR behavior without to induce magnetoresistive effect. Similarly, although partial substitution of Mn seems to be the way to increase the crosslink between magnetization and electric polarization in multiferroic YbMn<inf>2</inf>O<inf>5</inf> we found that it introduces a low level of disorder between the two transition metal positions in the YbFeMnO<inf>5</inf> structure. The lack of evidence for a crystallographic phase transition to a polar space group rules out expectations of a spontaneous electric polarization. In addition, the observed collinear magnetic structure with k = 0 does not permit a spin polarization and, therefore, YbMnFeO<inf>5</inf> is not expected to be a multiferroic compound.","PeriodicalId":412236,"journal":{"name":"2009 4th International Conference on Recent Advances in Space Technologies","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129492055","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

Cosmo Flower 2008 mission for legend and education - Connection with plant science under space environment 宇宙之花2008年的传奇和教育任务-在空间环境下与植物科学的联系

2009 4th International Conference on Recent Advances in Space Technologies Pub Date : 2009-06-11 DOI: 10.1109/RAST.2009.5158273

K. Tomita-Yokotani, K. Baba, Y. Hasegawa, H. Hashimoto, M. Yamashita

引用次数: 0

Techniques of aquisition, processing and validation of satellite images 卫星图像的获取、处理和验证技术

2009 4th International Conference on Recent Advances in Space Technologies Pub Date : 2009-06-11 DOI: 10.1109/RAST.2009.5158238

Marinela Nidelea, N. Jula, K. Izet-Unsalan, C. Racuciu, A. Dascalescu, D. Unsalan

引用次数: 1

Assessment of the effect of salinity on the early growth stage of soybean plants (Glycine max L.) 盐度对大豆植株生长早期影响的评价

2009 4th International Conference on Recent Advances in Space Technologies Pub Date : 2009-06-11 DOI: 10.1109/RAST.2009.5158233

D. Krezhova, I. Iliev, O. Yanev, E. Kirova

{"title":"Assessment of the effect of salinity on the early growth stage of soybean plants (Glycine max L.)","authors":"D. Krezhova, I. Iliev, O. Yanev, E. Kirova","doi":"10.1109/RAST.2009.5158233","DOIUrl":"https://doi.org/10.1109/RAST.2009.5158233","url":null,"abstract":"The effects of different salt concentration treatment of soybean plants and the occurrence of salinity stress have been assessed from a comparative analysis of remotely sensed ground-based spectral reflectance data and biochemical parameters. The contents of phenols, proline, malondialdehid, hydrogen peroxide, thiol groups, and chlorophyll a and b have been determined. The soybean plants were grown under controlled conditions as water cultures on Helrigel nutrient solution. Salinity was performed at the stage of 2nd to 4th trifoliate expanded leaves by adding of NaCl in the nutrient solution in concentrations 40 mM and 80 mM. The leaf spectral reflectance was measured in laboratory in the visible and near infrared spectral ranges using a fibre-optic multichannel spectrometer. An algorithm based on multivariate statistical analysis of the leaf reflectance spectra was developed. It includes Student's t-criterion, discriminant analysis and derivative analysis. The spectral intervals of interest were the green, red, red-edge and near infrared ranges of the spectrum. Statistically significant differences at p≪0.05 were found between the leaf spectral reflectance data of control and treated plants at 80 mM NaCl in all of the ranges examined with the exception of the near infrared range. No statistically significant differences were established at 40 mM NaCl treatment. Some of the biochemical parameters (proline, malondialdehid, thiol groups) were found at salinity treatment by 40 mM NaCl to increase in value more than 10% while the chlorophyll a and b concentrations decreased more than 20%. This trend was preserved for the 80 mM NaCl treatment as the corresponding parameters changed by about 45% on average, which is symptomatic for the stressed plants.","PeriodicalId":412236,"journal":{"name":"2009 4th International Conference on Recent Advances in Space Technologies","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123469430","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: 15

Multiobjective Genetic Algorithm optimization of the composite laminates as a satellite structure material for coefficient of thermal expansion and elastic modulus 卫星结构材料复合层压板热膨胀系数和弹性模量的多目标遗传算法优化

2009 4th International Conference on Recent Advances in Space Technologies Pub Date : 2009-06-11 DOI: 10.1109/RAST.2009.5158179

L. Aydın, H. Seçil Artem

引用次数: 5

Response of chlorophyll fluorescence to salinity stress on the early growth stage of the soybean plants (Glycine max L.) 大豆生长早期叶绿素荧光对盐胁迫的响应

2009 4th International Conference on Recent Advances in Space Technologies Pub Date : 2009-06-11 DOI: 10.1109/RAST.2009.5158234

I. Iliev, D. Krezhova, O. Yanev, E. Kirova, V. Alexieva

{"title":"Response of chlorophyll fluorescence to salinity stress on the early growth stage of the soybean plants (Glycine max L.)","authors":"I. Iliev, D. Krezhova, O. Yanev, E. Kirova, V. Alexieva","doi":"10.1109/RAST.2009.5158234","DOIUrl":"https://doi.org/10.1109/RAST.2009.5158234","url":null,"abstract":"The chlorophyll fluorescence in response to salinity stress of soybean plants in spectral range 650–850 nm and slow transient fluorescence kinetics were investigated using remote sensing techniques. The soybean plants were grown under controlled conditions as water cultures on nutrient solution of Helrigel. Salinity was performed at the stage of 2nd to 4th trifoliate expanded leaves by adding of NaCl in the nutrient solution at concentrations 40 mM and 80 mM. The chlorophyll fluorescence was registered by a multichannel fiber optic spectrometer USB2000 working in time-acquisition mode. As a source of actinic light, a light emitting diode with the maximum of the light output at 470 nm was used. The fluorescence spectra were registered subsequently in time at every 2 second. At least 40 spectra from each soybean leaf were obtained; the leaves being taken from 20 control plants and 20 plants treated with two NaCl concentrations. Measurements were conducted on the 14th day after treatment. Several indices such as fluorescence spectra area, halfwidth of the fluorescence spectral curve, and wavelength of spectrum maximum were used to characterize the differences between the normalized fluorescence spectra of leaves of control and treated plants. The Student t-criterion, discriminant analysis and derivative analysis were applied to estimate the statistical significance of the differences between the average values of the indices. The results revealed that the low NaCl concentration led to salinity tolerance while the high NaCl concentration caused salinity stress in the soybean plants.","PeriodicalId":412236,"journal":{"name":"2009 4th International Conference on Recent Advances in Space Technologies","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128014146","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: 2