http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Radiometric Resolution of Motion-Induced Synthetic Aperture Radiometer
Hyuk Park,Camps, A.,Min Gyu Choi,Yong-Hoon Kim IEEE 2011 IEEE geoscience and remote sensing letters Vol.8 No.4
<P>The radiometric resolution of a motion-induced synthetic aperture radiometer (MISAR) is analytically obtained from the standard deviation of a baseline response, an observation scenario, and the imaging method of the MISAR. The intrinsic long integration time given by the whole dwell time on moving platforms improves the radiometric resolution compared with the snapshot resolution of other nominal synthetic aperture radiometers. In addition, it is illustrated that the MISAR imaging holds the tradeoff relationship between the radiometric and spatial resolutions.</P>
Delay Tracking in Spaceborne GNSS-R Ocean Altimetry
Park, Hyuk,Valencia, Enric,Camps, Adriano,Rius, Antonio,Ribo, Serni,Martin-Neira, Manuel IEEE 2013 IEEE geoscience and remote sensing letters Vol.10 No.1
<P>Tracking, in radar altimetry, is the positioning of the waveforms in the correlation window. This letter presents a tracking strategy in spaceborne altimetry using global navigation satellite system reflectometry. First, the tracking procedure is illustrated, and the tracking parameters are discussed one by one: the determination of the correlation window, the accuracy of specular delay guess, and the tracking-refresh period. Based on the results, the proposed European Space Agency Passive Reflectometry and Interferometry System In-Orbit Demonstrator tracking case study is examined.</P>
A methodology to derive global maps of leaf traits using remote sensing and climate data
Moreno-Martí,nez, Á,lvaro,Camps-Valls, Gustau,Kattge, Jens,Robinson, Nathaniel,Reichstein, Markus,van Bodegom, Peter,Kramer, Koen,Cornelissen, J. Hans C.,Reich, Peter,Bahn, Michael,Niineme Elsevier 2018 Remote sensing of environment Vol.218 No.-
<P><B>Abstract</B></P> <P>This paper introduces a modular processing chain to derive global high-resolution maps of leaf traits. In particular, we present global maps at 500 m resolution of specific leaf area, leaf dry matter content, leaf nitrogen and phosphorus content per dry mass, and leaf nitrogen/phosphorus ratio. The processing chain exploits machine learning techniques along with optical remote sensing data (MODIS/Landsat) and climate data for gap filling and up-scaling of in-situ measured leaf traits. The chain first uses random forests regression with surrogates to fill gaps in the database (> 45<I>%</I> of missing entries) and maximizes the global representativeness of the trait dataset. Plant species are then aggregated to Plant Functional Types (PFTs). Next, the spatial abundance of PFTs at MODIS resolution (500 m) is calculated using Landsat data (30 m). Based on these PFT abundances, representative trait values are calculated for MODIS pixels with nearby trait data. Finally, different regression algorithms are applied to globally predict trait estimates from these MODIS pixels using remote sensing and climate data. The methods were compared in terms of precision, robustness and efficiency. The best model (random forests regression) shows good precision (normalized RMSE≤ 20<I>%</I>) and goodness of fit (averaged Pearson's correlation R = 0.78) in any considered trait. Along with the estimated global maps of leaf traits, we provide associated uncertainty estimates derived from the regression models. The process chain is modular, and can easily accommodate new traits, data streams (traits databases and remote sensing data), and methods. The machine learning techniques applied allow attribution of information gain to data input and thus provide the opportunity to understand trait-environment relationships at the plant and ecosystem scales. The new data products – the gap-filled trait matrix, a global map of PFT abundance per MODIS gridcells and the high-resolution global leaf trait maps – are complementary to existing large-scale observations of the land surface and we therefore anticipate substantial contributions to advances in quantifying, understanding and prediction of the Earth system.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Presented a modular process chain for plant trait mapping including local effects </LI> <LI> High-resolution global maps of leaf traits by fusing measured trait data, LANDSAT and MODIS </LI> <LI> Scope for testing and parameterizing trait-enabled Earth System models </LI> <LI> Implications for land management and Earth system science applications </LI> </UL> </P>
Potential strategies for prevention of tumor spillage in minimally invasive radical hysterectomy
Vicente Bebia,Sonia Monreal-Clua,Assumpció Pérez-Benavente,Silvia Franco-Camps,Berta Díaz-Feijoo,Antonio Gil-Moreno 대한부인종양학회 2020 Journal of Gynecologic Oncology Vol.31 No.5
Objective: The publication of a prospective [1] and several retrospective [2,3] studiesdescribing a worse prognosis in patients affected with early-stage cervical cancer whounderwent a minimally invasive radical hysterectomy has raised a high concern in whatmeasures should be undertaken in order to revert these results. Potential strategies [4] toprevent tumor spillage have been previously proposed. Methods: In this video, we describe nine strategies that should be addressed in future trialsregarding this procedure. Results: These strategies are:1. Fallopian tubes should be coagulated prior to start the surgery. 2. All sentinel lymph nodes and lymphadenectomy specimens should be obtained withoutlymph nodes fragmentation. 3. All surgical specimens should be extracted within a containment bag. 4. Uterine manipulators must never be used. 5. Prior to vaginal section, a closed knotted ligature should be placed around the vagina,proximal to the section line, and the remaining vaginal cavity profusely washed. 6. Once the vagina is opened, the surgical specimen should be extracted vaginally within aspecimen retrieval bag. 7. After surgery, the pelvic cavity is profusely washed with physiological serum, and the vaginashould be washed with iodopovidone diluted to 10% [5]. 8. Port-site metastasis prevention measures should be performed. 9. Every action made to prevent tumor spillage should be recorded in the surgical report. Conclusion: As there is a biological rationale in these measures that would prevent tumorspillage and seeding, there is a need of prospectively exploring them within appropriatestudies in order to determine their own oncological outcome.
Lee, Chong‐,Yong,Park, Hyun S.,Fontecilla‐,Camps, Juan C.,Reisner, Erwin John Wiley and Sons Inc. 2016 Angewandte Chemie Vol.55 No.20
<P><B>Abstract</B></P><P>The combination of enzymes with semiconductors enables the photoelectrochemical characterization of electron‐transfer processes at highly active and well‐defined catalytic sites on a light‐harvesting electrode surface. Herein, we report the integration of a hydrogenase on a TiO<SUB>2</SUB>‐coated p‐Si photocathode for the photo‐reduction of protons to H<SUB>2</SUB>. The immobilized hydrogenase exhibits activity on Si attributable to a bifunctional TiO<SUB>2</SUB> layer, which protects the Si electrode from oxidation and acts as a biocompatible support layer for the productive adsorption of the enzyme. The p‐Si|TiO<SUB>2</SUB>|hydrogenase photocathode displays visible‐light driven production of H<SUB>2</SUB> at an energy‐storing, positive electrochemical potential and an essentially quantitative faradaic efficiency. We have thus established a widely applicable platform to wire redox enzymes in an active configuration on a p‐type semiconductor photocathode through the engineering of the enzyme–materials interface.</P>