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article

Wybrane aspekty przetwarzania danych pomiarowych w urządzeniach walki radioelektronicznej

Kazimierz Banasiak

Biuletyn Wojskowej Akademii Technicznej > 2023 > Vol. 72, nr 3 > 83--119

Walka radioelektroniczna Wre (ang. EW - Electronic Warfare) jest zamierzonym działaniem opartym na wykorzystaniu widma elektromagnetycznego i obejmuje: - przechwyt i identyfikację emisji elektromagnetycznych, - zmniejszenie skuteczności działań urządzeń elektronicznych przeciwnika, - zapewnienie efektywnego wykorzystania widma przez siły własne. Zadaniem WRE w czasie pokoju jest zdobywanie informacji...

article

Czynniki stabilizacji systemu politycznego w Meksyku w XXI w.

Anita Oberda-Monkiewicz

Ameryka Łacińska. Kwartalnik analityczno-informacyjny > 2022 > 30 > 1 (115) > 25-46

Artykuł przedstawia ewolucję wybranych elementów systemu politycznego w Meksyku wpływających na jego względną stabilizację i przewidywalność na tle pozostałych państw regionu. Dokonuje ich przeglądu z perspektywy zarówno historycznej, jak i współcze-snej, ze szczególnym uwzględnieniem ich oddziaływań na proces kształtowania polityki państwa.

article

Climate change disclosure and evolving institutional investor salience: Roles of the Principles for Responsible Investment

Kentaro Azuma, Akira Higashida

Business Strategy and the Environment > 33 > 4 > 3669 - 3686

This study investigates the relationship between climate change disclosure and institutional investors. A particular focus of the present study is the question of if and how the relationship is affected by the Principles for Responsible Investment (PRI). A relevant context to the question is shareholder engagement, where institutional investors' legitimacy affects the outcomes. Thus, this study examines...

article

Drone‐based physiological index reveals long‐term acclimation and drought stress responses in trees

Petra D'Odorico, Leonie Schönbeck, Valentina Vitali, Katrin Meusburger, more

Plant, Cell & Environment > 44 > 11 > 3552 - 3570

Monitoring early tree physiological responses to drought is key to understanding progressive impacts of drought on forests and identifying resilient species. We combined drone‐based multispectral remote sensing with measurements of tree physiology and environmental parameters over two growing seasons in a 100‐y‐old Pinus sylvestris forest subject to 17‐y of precipitation manipulation. Our goal was...

article

Seasonal variation in the canopy color of temperate evergreen conifer forests

Bijan Seyednasrollah, David R. Bowling, Rui Cheng, Barry A. Logan, more

New Phytologist > 229 > 5 > 2586 - 2600

Evergreen conifer forests are the most prevalent land cover type in North America. Seasonal changes in the color of evergreen forest canopies have been documented with near‐surface remote sensing, but the physiological mechanisms underlying these changes, and the implications for photosynthetic uptake, have not been fully elucidated. Here, we integrate on‐the‐ground phenological observations,...

article

Analysis of Changes in Photochemical Reflectance Index (PRI) in Relation to the Acidification of the Lumen of the Chloroplasts of Pea and Geranium Leaves under a Short-Term Illumination

E. M. Sukhova, L. M. Yudina, V. A. Vodeneev, V. S. Sukhov

Biochemistry (Moscow), Supplement Series A: Membrane and Cell Biology > 2019 > 13 > 3 > 243-252

— Measurement of the photochemical reflectance index (PRI) is a simple and non-invasive method for the evaluation of photosynthetic processes in higher plants. At the same time, the relationship between photosynthetic parameters and PRI can be significantly modified at the initial stages of illumination; thus, the study of the mechanisms of development of PRI after the beginning of illumination is...

article

Modeling leaf CO₂ assimilation and Photosystem II photochemistry from chlorophyll fluorescence and the photochemical reflectance index

Kouki Hikosaka, Hibiki M. Noda

Plant, Cell & Environment > 42 > 2 > 730 - 739

We present a simple model to assess the quantum yield of photochemistry (Φ_P) and CO₂ assimilation rate from two parameters that are detectable by remote sensing: chlorophyll (chl) fluorescence and the photochemical reflectance index (PRI). Φ_P is expressed as a simple function of the chl fluorescence yield (Φ_F) and nonphotochemical quenching (NPQ): Φ_P = 1–bΦ_F(1 + NPQ). Because NPQ is known to be related...

article

Dehydration-induced changes in spectral reflectance indices and chlorophyll fluorescence of Antarctic lichens with different thallus color, and intrathalline photobiont

Barták Miloš, Hájek Josef, Morkusová Jana, Skácelová Kateřina, more

Acta Physiologiae Plantarum > 2018 > 40 > 10 > 1-19

In this study, we investigated responses of the Photochemical Reflectance Index (PRI), and Normalized Difference Vegetation Index (NDVI) to gradual dehydration of several Antarctic lichen species (chlorolichens: Xanthoria elegans, Rhizoplaca melanophthalma, Physconia muscigena, cyanolichen: Leptogium puberulum), and a Nostoc commune colony from fully wet to a dry state. The gradual loss of physiological...

article

Different genotypes of Dalbergia sissoo trees modified microclimate dynamics differently on understory crop cowpea (Vigna unguiculata) as assessed through ecophysiological and spectral traits in agroforestry system

Badre Alam, Rashmi Singh, A.R. Uthappa, Mayank Chaturvedi, more

Agricultural and Forest Meteorology > 2018 > 249 > C > 138-148

Microclimate being a crucial and challenging issue for the growth, survivability and ecological relevance of understory crops in agroforestry system, major aim of the present study was to determine that how the micro-environment was modulated by the canopies of different genotypes of a same tree species. Field experiments were conducted at Central Agroforestry Research Institute, Jhansi, during kharif...

article

Advancing retrievals of surface reflectance and vegetation indices over forest ecosystems by combining imaging spectroscopy, digital object models, and 3D canopy modelling

D. Fawcett, W. Verhoef, D. Schläpfer, F.D. Schneider, more

Remote Sensing of Environment > 2018 > 204 > C > 583-595

Imaging spectroscopy based methods offer unique capabilities for retrieving narrow-band vegetation indices which can be empirically related to functional traits of plants. However, in areas with complex topography, illumination effects affect the retrieval of such indices from high spatial resolution airborne or satellite data. Irradiance components at the pixel level are determined by atmospheric...

article

Corporate Social Responsibility and Shareholder Proposals

Erwin Eding, Bert Scholtens

Corporate Social Responsibility and Environmental Management > 24 > 6 > 648 - 660

We study how corporate social responsibility relates to investors, firms, and shareholder proposals. We examine shareholder proposals on environmental, social, and governance issues at the annual general meeting of shareholders with US Fortune 250 firms during 2011–2014. We find that the probability of receiving shareholder proposals on environmental issues is positively associated with responsible...

article

Sustainability of global communities and regional risk governance

Hiroshige Tanaka

Asia-Pacific Journal of Regional Science > 2017 > 1 > 2 > 639-653

As global markets grow and come to be connected firmly, the risk that some local difficulties might grow and transform into global crises is rising. This paper presents an analytical exploration, using social surplus, of effects on local and global communities. Globalized economies tend to lower the relative revenue of governments by presenting comparison to the growing scale of private economies...

article

Capturing species-level drought responses in a temperate deciduous forest using ratios of photochemical reflectance indices between sunlit and shaded canopies

Taehee Hwang, Hamed Gholizadeh, Daniel A. Sims, Kimberly A. Novick, more

Remote Sensing of Environment > 2017 > 199 > C > 350-359

To classify trees along a spectrum of isohydric to anisohydric behavior is a promising new framework for identifying tree species' sensitivities to drought stress, directly related to the vulnerability of carbon uptake of terrestrial ecosystems with increased hydroclimate variability. Trees with isohydric strategies regulate stomatal conductance to maintain stationary leaf water potential, while trees...

article

Linking stand architecture with canopy reflectance to estimate vertical patterns of light-use efficiency

Nicholas C. Coops, Txomin Hermosilla, Thomas Hilker, T. Andrew Black

Remote Sensing of Environment > 2017 > 194 > C > 322-330

Remote sensing of plant carbon uptake, or gross primary production (GPP), in a repeatable and consistent manner remains a key element of a comprehensive understanding of the role of vegetation within the global carbon cycle. To further this understanding at a landscape level or global scale, accurate remote sensing of photosynthetic light-use efficiency (LUE) is required to understand photosynthetic...

chapter

A comparative analysis of entropy based segmentation with Otsu method for gray and color images

Hitesh Sen, Ankit Agarwal

2017 International conference of Electronics, Communication and Aerospace Technology (ICECA) > 1 > 113 - 118

2017 International conference of Electronics, Communication and Aerospace Technology (ICECA)

Image segmentation quality is usually governed by two main parameters associated with a particular segmentation method: threshold selection and seed-point selection. Various methods such as the histogram method, entropy based method, busyness measure methods, etc. are well known for threshold selection in the image segmentation problems. In this thesis, threshold selection is done on the basis of...

article

Photosynthetic efficiency of northern forest ecosystems using a MODIS-derived Photochemical Reflectance Index (PRI)

E.M. Middleton, K.F. Huemmrich, D.R. Landis, T.A. Black, more

Remote Sensing of Environment > 2016 > 187 > C > 345-366

This study evaluates a direct remote sensing approach from space for the determination of ecosystem photosynthetic light use efficiency (LUE), through measurement of vegetation reflectance changes expressed with the Photochemical Reflectance Index (PRI). The PRI is a normalized difference index based on spectral changes at a physiologically active wavelength (~531nm) as compared to a reference waveband,...

article

Integrating chlorophyll fAPAR and nadir photochemical reflectance index from EO-1/Hyperion to predict cornfield daily gross primary production

Qingyuan Zhang, Elizabeth M. Middleton, Yen-Ben Cheng, K. Fred Huemmrich, more

Remote Sensing of Environment > 2016 > 186 > C > 311-321

The concept of light use efficiency (ε) and the concept of fraction of photosynthetically active ration (PAR) absorbed for vegetation photosynthesis (PSN), i.e., fAPAR_PSN, have been widely utilized to estimate vegetation gross primary productivity (GPP). It has been demonstrated that the photochemical reflectance index (PRI) is empirically related to ε. An experimental US Department of Agriculture...

chapter

Design of extensible forwarding element architecture and its key technology verification

Xin Lei Hu, Xian Rong Wang, Lu Wang, Hua Li

2016 International Conference on Integrated Circuits and Microsystems (ICICM) > 214 - 218

2016 International Conference on Integrated Circuits and Microsystems (ICICM)

To offer flexible and programmable forwarding plane, we propose a solution from the perspective of system architecture. An extensible forwarding element architecture (EFEA) based on SDN is proposed, in which the core part is three layer forwarding element architecture (TLFEA). It also includes FE OS image service in SDN controller, FE OS image management system, FE OS development system. In order...

chapter

Sunlit/shaded light-use efficiency estimation of cropland using hyperspectral data

Dongjie Fu, Lifu Zhang, Yelu Zeng

2016 8th Workshop on Hyperspectral Image and Signal Processing: Evolution in Remote Sensing (WHISPERS) > 1 - 4

2016 8th Workshop on Hyperspectral Image and Signal Processing: Evolution in Remote Sensing (WHISPERS)

The light-use efficiency (LUE) is one of critical parameters in the terrestrial ecosystem production studies. Although some published paper on the LUE in cropland had used hyperspectral data, lack of study in literature investigated the cropland LUE using the surface reflectance with high spatiotemporal and high spectral data with multiple angles. Based on the observed reflectance and flux data, a...

chapter

Application of the photochemical reflectance index to track light use efficiency with a two-leaf model

Qian Zhang, Weimin Ju, Jing M. Chen, Fengting Yang

2016 IEEE International Geoscience and Remote Sensing Symposium (IGARSS) > 5362 - 5365

IGARSS 2016 - 2016 IEEE International Geoscience and Remote Sensing Symposium

Proper determination of light use efficiency (LUE) is a prerequisite for LUE models to simulate gross primary productivity (GPP). This study was devoted to apply the photochemical reflectance index (PRI) to accurately track LUE variations for a sub-tropical coniferous forest using tower-based PRI and GPP measurements. To improve the ability of PRI to track LUE, a simple two-leaf approach is used to...

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Wybrane aspekty przetwarzania danych pomiarowych w urządzeniach walki radioelektronicznej

Czynniki stabilizacji systemu politycznego w Meksyku w XXI w.

Climate change disclosure and evolving institutional investor salience: Roles of the Principles for Responsible Investment

Drone‐based physiological index reveals long‐term acclimation and drought stress responses in trees

Seasonal variation in the canopy color of temperate evergreen conifer forests

Analysis of Changes in Photochemical Reflectance Index (PRI) in Relation to the Acidification of the Lumen of the Chloroplasts of Pea and Geranium Leaves under a Short-Term Illumination

Modeling leaf CO₂ assimilation and Photosystem II photochemistry from chlorophyll fluorescence and the photochemical reflectance index

Dehydration-induced changes in spectral reflectance indices and chlorophyll fluorescence of Antarctic lichens with different thallus color, and intrathalline photobiont

Different genotypes of Dalbergia sissoo trees modified microclimate dynamics differently on understory crop cowpea (Vigna unguiculata) as assessed through ecophysiological and spectral traits in agroforestry system

Advancing retrievals of surface reflectance and vegetation indices over forest ecosystems by combining imaging spectroscopy, digital object models, and 3D canopy modelling

Corporate Social Responsibility and Shareholder Proposals

Sustainability of global communities and regional risk governance

Capturing species-level drought responses in a temperate deciduous forest using ratios of photochemical reflectance indices between sunlit and shaded canopies

Linking stand architecture with canopy reflectance to estimate vertical patterns of light-use efficiency

A comparative analysis of entropy based segmentation with Otsu method for gray and color images

Photosynthetic efficiency of northern forest ecosystems using a MODIS-derived Photochemical Reflectance Index (PRI)

Integrating chlorophyll fAPAR and nadir photochemical reflectance index from EO-1/Hyperion to predict cornfield daily gross primary production

Design of extensible forwarding element architecture and its key technology verification

Sunlit/shaded light-use efficiency estimation of cropland using hyperspectral data

Application of the photochemical reflectance index to track light use efficiency with a two-leaf model

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