The Experts below are selected from a list of 17226 Experts worldwide ranked by ideXlab platform
Herman Ramon - One of the best experts on this subject based on the ideXlab platform.
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on line measurement of some selected soil ProPerties using a vis nir sensor
Soil & Tillage Research, 2007Co-Authors: Abdul Mounem Mouazen, Mohammadreza Maleki, J De Baerdemaeker, Herman RamonAbstract:Abstract The on-line measurement of soil ProPerties is essential for site-sPecific aPPlication of different inPuts into agricultural soils. Using a Previously develoPed soil sensor for on-line measurement of soil ProPerties, Primary results about carbon (C), moisture content (MC), PH and PhosPhorous (P) were rePorted. The on-line sensor consisted of a soil Penetration unit (subsoiler), to which the oPtical Probe to acquire soil sPectra from the bottom of the trench oPened by the subsoiler chisel is attached. A mobile, fibre-tyPe, visible (VIS) and near infrared (NIR) sPectroPhotometer (Zeiss Corona 45 visnir fibre, Germany), with a measurement range of 306.5–1710.9 nm was used to measure soil sPectra in reflectance mode. General calibration models were established under non-mobile laboratory conditions, on the basis of two samPle sets collected from large geograPhical areas covering Belgium and northern France. These models were develoPed using Partial least squares (PLS) regression couPled with the full cross-validation technique. On the basis of the values of coefficient of multiPle determination ( R 2 ) and the ratio of standard deviation of calibration set (S.D.) to root mean square error of cross-validation (RMSECV), the Prediction of MC was evaluated as good, whereas the Predictions of C, PH and P were evaluated as only Possible to Provide quantitative aPProximations. When these models were validated using on-line measured sPectra, they Provided moderately similar maPs to those measured with the reference methods. The best similarity was obtained for MC maPs. Mean error values of 5.97, 0.37, 27.48 and 5.10% were found between the on-line and reference measurements of total carbon (C-tot), MC, PH and available PhosPhorous (P-avl), resPectively, suggesting the Potential use of the VIS–NIR sensing system for on-line measurement of soil ProPerties.
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On-line measurement of some selected soil ProPerties using a VIS–NIR sensor
Soil and Tillage Research, 2007Co-Authors: Abdul Mounem Mouazen, Mohammadreza Maleki, J De Baerdemaeker, Herman RamonAbstract:Abstract The on-line measurement of soil ProPerties is essential for site-sPecific aPPlication of different inPuts into agricultural soils. Using a Previously develoPed soil sensor for on-line measurement of soil ProPerties, Primary results about carbon (C), moisture content (MC), PH and PhosPhorous (P) were rePorted. The on-line sensor consisted of a soil Penetration unit (subsoiler), to which the oPtical Probe to acquire soil sPectra from the bottom of the trench oPened by the subsoiler chisel is attached. A mobile, fibre-tyPe, visible (VIS) and near infrared (NIR) sPectroPhotometer (Zeiss Corona 45 visnir fibre, Germany), with a measurement range of 306.5–1710.9 nm was used to measure soil sPectra in reflectance mode. General calibration models were established under non-mobile laboratory conditions, on the basis of two samPle sets collected from large geograPhical areas covering Belgium and northern France. These models were develoPed using Partial least squares (PLS) regression couPled with the full cross-validation technique. On the basis of the values of coefficient of multiPle determination ( R 2 ) and the ratio of standard deviation of calibration set (S.D.) to root mean square error of cross-validation (RMSECV), the Prediction of MC was evaluated as good, whereas the Predictions of C, PH and P were evaluated as only Possible to Provide quantitative aPProximations. When these models were validated using on-line measured sPectra, they Provided moderately similar maPs to those measured with the reference methods. The best similarity was obtained for MC maPs. Mean error values of 5.97, 0.37, 27.48 and 5.10% were found between the on-line and reference measurements of total carbon (C-tot), MC, PH and available PhosPhorous (P-avl), resPectively, suggesting the Potential use of the VIS–NIR sensing system for on-line measurement of soil ProPerties.
M. S. Ramachandra Rao - One of the best experts on this subject based on the ideXlab platform.
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Zn-vacancy induced violet emission in P-tyPe PhosPhorus and nitrogen codoPed ZnO thin films grown by Pulsed laser dePosition
Applied Surface Science, 2015Co-Authors: Ramanjaneyulu Mannam, Senthil Kumar Eswaran, Nandita Dasgupta, M. S. Ramachandra RaoAbstract:Abstract We rePort on the growth of violet emitting P-tyPe ZnO thin films, with PhosPhorous (P) and nitrogen (N) codoPing, using Pulsed laser dePosition. XPS studies show that the PhosPhorous is substituted at Zn site, whereas nitrogen is substituted at oxygen site. Hall measurements confirmed the P-tyPe nature in codoPed ZnO thin films. I-V characteristics of the heterojunction formed by n-Si and P, N: ZnO showed rectifying nature. Strong violet emission in PL sPectra is attributed to the formation of zinc vacancies. We ProPose a defect comPlex, (PZn-VZn-4NO), which acts as an effective accePtor in the P and N codoPed ZnO.
Abdul Mounem Mouazen - One of the best experts on this subject based on the ideXlab platform.
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on line measurement of some selected soil ProPerties using a vis nir sensor
Soil & Tillage Research, 2007Co-Authors: Abdul Mounem Mouazen, Mohammadreza Maleki, J De Baerdemaeker, Herman RamonAbstract:Abstract The on-line measurement of soil ProPerties is essential for site-sPecific aPPlication of different inPuts into agricultural soils. Using a Previously develoPed soil sensor for on-line measurement of soil ProPerties, Primary results about carbon (C), moisture content (MC), PH and PhosPhorous (P) were rePorted. The on-line sensor consisted of a soil Penetration unit (subsoiler), to which the oPtical Probe to acquire soil sPectra from the bottom of the trench oPened by the subsoiler chisel is attached. A mobile, fibre-tyPe, visible (VIS) and near infrared (NIR) sPectroPhotometer (Zeiss Corona 45 visnir fibre, Germany), with a measurement range of 306.5–1710.9 nm was used to measure soil sPectra in reflectance mode. General calibration models were established under non-mobile laboratory conditions, on the basis of two samPle sets collected from large geograPhical areas covering Belgium and northern France. These models were develoPed using Partial least squares (PLS) regression couPled with the full cross-validation technique. On the basis of the values of coefficient of multiPle determination ( R 2 ) and the ratio of standard deviation of calibration set (S.D.) to root mean square error of cross-validation (RMSECV), the Prediction of MC was evaluated as good, whereas the Predictions of C, PH and P were evaluated as only Possible to Provide quantitative aPProximations. When these models were validated using on-line measured sPectra, they Provided moderately similar maPs to those measured with the reference methods. The best similarity was obtained for MC maPs. Mean error values of 5.97, 0.37, 27.48 and 5.10% were found between the on-line and reference measurements of total carbon (C-tot), MC, PH and available PhosPhorous (P-avl), resPectively, suggesting the Potential use of the VIS–NIR sensing system for on-line measurement of soil ProPerties.
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On-line measurement of some selected soil ProPerties using a VIS–NIR sensor
Soil and Tillage Research, 2007Co-Authors: Abdul Mounem Mouazen, Mohammadreza Maleki, J De Baerdemaeker, Herman RamonAbstract:Abstract The on-line measurement of soil ProPerties is essential for site-sPecific aPPlication of different inPuts into agricultural soils. Using a Previously develoPed soil sensor for on-line measurement of soil ProPerties, Primary results about carbon (C), moisture content (MC), PH and PhosPhorous (P) were rePorted. The on-line sensor consisted of a soil Penetration unit (subsoiler), to which the oPtical Probe to acquire soil sPectra from the bottom of the trench oPened by the subsoiler chisel is attached. A mobile, fibre-tyPe, visible (VIS) and near infrared (NIR) sPectroPhotometer (Zeiss Corona 45 visnir fibre, Germany), with a measurement range of 306.5–1710.9 nm was used to measure soil sPectra in reflectance mode. General calibration models were established under non-mobile laboratory conditions, on the basis of two samPle sets collected from large geograPhical areas covering Belgium and northern France. These models were develoPed using Partial least squares (PLS) regression couPled with the full cross-validation technique. On the basis of the values of coefficient of multiPle determination ( R 2 ) and the ratio of standard deviation of calibration set (S.D.) to root mean square error of cross-validation (RMSECV), the Prediction of MC was evaluated as good, whereas the Predictions of C, PH and P were evaluated as only Possible to Provide quantitative aPProximations. When these models were validated using on-line measured sPectra, they Provided moderately similar maPs to those measured with the reference methods. The best similarity was obtained for MC maPs. Mean error values of 5.97, 0.37, 27.48 and 5.10% were found between the on-line and reference measurements of total carbon (C-tot), MC, PH and available PhosPhorous (P-avl), resPectively, suggesting the Potential use of the VIS–NIR sensing system for on-line measurement of soil ProPerties.
Esteban Balseiro - One of the best experts on this subject based on the ideXlab platform.
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Light intensity regulates stoichiometry of benthic grazers through changes in the quality of stream PeriPhyton
Freshwater Science, 2019Co-Authors: Nicolás Alejandro Martyniuk, Beatriz Modenutti, Esteban BalseiroAbstract:AbstractIn mountain streams, light is a key factor for Primary Production and Primary Producer nutrient stoichiometry, or the relative comPosition of carbon (C) comPared to PhosPhorous (P) and nitr...
Ramanjaneyulu Mannam - One of the best experts on this subject based on the ideXlab platform.
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Zn-vacancy induced violet emission in P-tyPe PhosPhorus and nitrogen codoPed ZnO thin films grown by Pulsed laser dePosition
Applied Surface Science, 2015Co-Authors: Ramanjaneyulu Mannam, Senthil Kumar Eswaran, Nandita Dasgupta, M. S. Ramachandra RaoAbstract:Abstract We rePort on the growth of violet emitting P-tyPe ZnO thin films, with PhosPhorous (P) and nitrogen (N) codoPing, using Pulsed laser dePosition. XPS studies show that the PhosPhorous is substituted at Zn site, whereas nitrogen is substituted at oxygen site. Hall measurements confirmed the P-tyPe nature in codoPed ZnO thin films. I-V characteristics of the heterojunction formed by n-Si and P, N: ZnO showed rectifying nature. Strong violet emission in PL sPectra is attributed to the formation of zinc vacancies. We ProPose a defect comPlex, (PZn-VZn-4NO), which acts as an effective accePtor in the P and N codoPed ZnO.