Bibliografías temáticas / Sun-images

Literatura académica sobre el tema "Sun-images"

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Publicado: 18 de mayo de 2024

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Artículos de revistas sobre el tema "Sun-images"

1

Häfner, Ralph. "Images of the Black Sun". Revue de littérature comparée 319, n.º 3 (2006): 285. http://dx.doi.org/10.3917/rlc.319.0285.

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Kumar, Mohi. "New Detailed Images of the Sun". Eos, Transactions American Geophysical Union 88, n.º 14 (3 de abril de 2007): 159. http://dx.doi.org/10.1029/2007eo140004.

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Greenslade, Thomas B. "Pinhole images of the eclipsing Sun". Physics Teacher 32, n.º 6 (septiembre de 1994): 347. http://dx.doi.org/10.1119/1.2344030.

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Kriss, Victor. "Measuring pinhole images of the sun". Physics Teacher 34, n.º 3 (marzo de 1996): 190–91. http://dx.doi.org/10.1119/1.2344399.

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Kumar, Mohi. "First 3-D images of the Sun". Eos, Transactions American Geophysical Union 88, n.º 18 (1 de mayo de 2007): 198. http://dx.doi.org/10.1029/2007eo180003.

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Delouille, V., P. Chainais y J. F. Hochedez. "Quantifying and containing the curse of high resolution coronal imaging". Annales Geophysicae 26, n.º 10 (15 de octubre de 2008): 3169–84. http://dx.doi.org/10.5194/angeo-26-3169-2008.

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Abstract. Future missions such as Solar Orbiter (SO), InterHelioprobe, or Solar Probe aim at approaching the Sun closer than ever before, with on board some high resolution imagers (HRI) having a subsecond cadence and a pixel area of about (80 km)2 at the Sun during perihelion. In order to guarantee their scientific success, it is necessary to evaluate if the photon counts available at these resolution and cadence will provide a sufficient signal-to-noise ratio (SNR). For example, if the inhomogeneities in the Quiet Sun emission prevail at higher resolution, one may hope to locally have more photon counts than in the case of a uniform source. It is relevant to quantify how inhomogeneous the quiet corona will be for a pixel pitch that is about 20 times smaller than in the case of SoHO/EIT, and 5 times smaller than TRACE. We perform a first step in this direction by analyzing and characterizing the spatial intermittency of Quiet Sun images thanks to a multifractal analysis. We identify the parameters that specify the scale-invariance behavior. This identification allows next to select a family of multifractal processes, namely the Compound Poisson Cascades, that can synthesize artificial images having some of the scale-invariance properties observed on the recorded images. The prevalence of self-similarity in Quiet Sun coronal images makes it relevant to study the ratio between the SNR present at SoHO/EIT images and in coarsened images. SoHO/EIT images thus play the role of "high resolution" images, whereas the "low-resolution" coarsened images are rebinned so as to simulate a smaller angular resolution and/or a larger distance to the Sun. For a fixed difference in angular resolution and in Spacecraft-Sun distance, we determine the proportion of pixels having a SNR preserved at high resolution given a particular increase in effective area. If scale-invariance continues to prevail at smaller scales, the conclusion reached with SoHO/EIT images can be transposed to the situation where the resolution is increased from SoHO/EIT to SO/HRI resolution at perihelion.
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Cui, Aijun, Jingyu Zhang, Yi Ma y Xi Zhang. "A Noise De-Correlation Based Sun Glint Correction Method and Its Effect on Shallow Bathymetry Inversion". Remote Sensing 14, n.º 23 (25 de noviembre de 2022): 5981. http://dx.doi.org/10.3390/rs14235981.

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Sun glint on the sea surface is the unavoidable noise in optical remote sensing images. Water depth retrieval based on optical remote sensing images is vulnerable to sun glint contamination. Different sun glint correction methods and their possible effects on improving the accuracy of optical remote sensing water depth inversion are worth adequately discussing. Considering the problem that traditional sun glint correction methods are not well applied in shallow or turbid water areas, this paper proposes a sun glint correction method based on noise de-correlation (ND-SGC) which is not affected by the essential characteristics of the water body itself and does not require any auxiliary data. In this paper, we analyze the spectral fidelity of remote sensing images by using ND-SGC method and traditional methods for sun glint correction, and compare the accuracy of bathymetry inversion in different water depth cases and between sun glint pixels and sun glint-free pixels. The experimental results indicated that: (1) the ND-SGC method gives different penalty weights to sun glint pixels and sun glint-free pixels, which meaningfully improves the bathymetric inversion accuracy of sun glint pixels and maintains the bathymetric inversion accuracy of sun glint-free pixels, and is applicable to any water depth range; (2) the ND-SGC method improves bathymetric inversion accuracy in the extremely shallow water region (0–2 m) and shallow water region (2–11 m), while the conventional method suppresses bathymetric inversion accuracy in these two water depth ranges; (3) the ND-SGC method maintains the inversion accuracy of the sun glint-free pixels, while the traditional Hedley method and Goodman method increase the mean relative error (MRE) of these pixels by a maximum of 6.7% and 8.8%, respectively; (4) the ND-SGC method preserves the inherent spectral information of the remote sensing image well, while the spectral fidelity index of the images corrected by traditional methods shows a certain degree of distortion of the image’s spectrum.
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Zeman, Ellen J. "Yohkoh Returns X‐Ray Images of the Sun". Physics Today 45, n.º 5 (mayo de 1992): 19. http://dx.doi.org/10.1063/1.2809656.

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Hu, Fangyu, Jie Ma, Bin Fang, Junfeng Ding y Jun Zhang. "Dehazing for images with sun in the sky". Journal of Electronic Imaging 28, n.º 04 (22 de julio de 2019): 1. http://dx.doi.org/10.1117/1.jei.28.4.043016.

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Gamble, Ryan G. "Tanning and Sun-Protection Portrayal in Magazine Images". Archives of Dermatology 147, n.º 8 (1 de agosto de 2011): 983. http://dx.doi.org/10.1001/archdermatol.2011.209.

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Tesis sobre el tema "Sun-images"

1

Sarkar, Bijoy Kumar. "Sun worship and sun-images in early Bengal". Thesis, University of North Bengal, 2004. http://hdl.handle.net/123456789/1241.

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Sarkar, Bijoy Kumar. "Sun worship and sun-images in early Bengal". Thesis, University of North Bengal, 2004. http://hdl.handle.net/123456789/1535.

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Zraqou, Jamal Sami. "Automated system design for the efficient processing of solar satellite images : developing novel techniques and software platform for the robust feature detection and the creation of 3D anaglyphs and super-resolution images for solar satellite images". Thesis, University of Bradford, 2011. http://hdl.handle.net/10454/5434.

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The Sun is of fundamental importance to life on earth and is studied by scientists from many disciplines. It exhibits phenomena on a wide range of observable scales, timescales and wavelengths and due to technological developments there is a continuing increase in the rate at which solar data is becoming available for study which presents both opportunities and challenges. Two satellites recently launched to observe the sun are STEREO (Solar TErrestrial RElations Observatory), providing simultaneous views of the SUN from two different viewpoints and SDO (Solar Dynamics Observatory) which aims to study the solar atmosphere on small scales and times and in many wavelengths. The STEREO and SDO missions are providing huge volumes of data at rates of about 15 GB per day (initially it was 30 GB per day) and 1.5 terabytes per day respectively. Accessing these huge data volumes efficiently at both high spatial and high time resolutions is important to support scientific discovery but requires increasingly efficient tools to browse, locate and process specific data sets. This thesis investigates the development of new technologies for processing information contained in multiple and overlapping images of the same scene to produce images of improved quality. This area in general is titled Super Resolution (SR), and offers a technique for reducing artefacts and increasing the spatial resolution. Another challenge is to generate 3D images such as Anaglyphs from uncalibrated pairs of SR images. An automated method to generate SR images is presented here. The SR technique consists of three stages: image registration, interpolation and filtration. Then a method to produce enhanced, near real-time, 3D solar images from uncalibrated pairs of images is introduced. Image registration is an essential enabling step in SR and Anaglyph processing. An accurate point-to-point mapping between views is estimated, with multiple images registered using only information contained within the images themselves. The performances of the proposed methods are evaluated using benchmark evaluation techniques. A software application called the SOLARSTUDIO has been developed to integrate and run all the methods introduced in this thesis. SOLARSTUDIO offers a number of useful image processing tools associated with activities highly focused on solar images including: Active Region (AR) segmentation, anaglyph creation, solar limb extraction, solar events tracking and video creation.
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4

Morris, Narrelle. "Destructive discourse: 'Japan-bashing' in the United States, Australia and Japan in the 1980s and 1990s". Thesis, Morris, Narrelle (2006) Destructive discourse: 'Japan-bashing' in the United States, Australia and Japan in the 1980s and 1990s. PhD thesis, Murdoch University, 2006. https://researchrepository.murdoch.edu.au/id/eprint/745/.

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By the 1960s-70s, most Western commentators agreed that Japan had rehabilitated itself from World War II, in the process becoming on the whole a reliable member of the international community. From the late 1970s onwards, however, as Japan’s economy continued to rise, this premise began to be questioned. By the late 1980s, a new ‘Japan Problem’ had been identified in Western countries, although the presentation of Japan as a dangerous ‘other’ was nevertheless familiar from past historical eras. The term ‘Japan-bashing’ was used by opponents of this negative view to suggest that much of the critical rhetoric about a ‘Japan Problem’ could be reduced to an unwarranted, probably racist, assault on Japan. This thesis argues that the invention and popularisation of the highly-contested label ‘Japan-bashing’, rather than averting criticism of Japan, perversely helped to exacerbate and transform the moderate anti-Japanese sentiment that had existed in Western countries in the late 1970s and early 1980s into a widely disseminated, heavily politicised and even encultured phenomenon in the late 1980s and 1990s. Moreover, when the term ‘Japan-bashing’ spread to Japan itself, Japanese commentators were quick to respond. In fact, the level and the nature of the response from the Japanese side is one crucial factor that distinguishes ‘Japan-bashing’ in the 1980s and 1990s from anti-Japanese sentiment expressed in the West in earlier periods. Ultimately, the label and the practice of ‘Japan-bashing’ helped to transform intellectual and popular discourses about Japan in both Western countries and Japan itself in the 1980s and 1990s. Moreover, in doing so, it revealed crucial features of wider Western and Japanese perceptions of the global order in the late twentieth century. Debates about Japan showed, for example, that economic strength had become at least as important as military power to national discourses about identity. However, the view that Western countries and Japan are generally incompatible, and share few, if any, common values, interests or goals, has been largely discarded in the early twenty-first century, in a process that demonstrated just how constructed, and transitory, such views can be.
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5

Morris, Narrelle. "Destructive Discourse: 'Japan-bashing' in the United States, Australia and Japan in the 1980s and 1990s". Murdoch University, 2006. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20061116.153222.

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By the 1960s-70s, most Western commentators agreed that Japan had rehabilitated itself from World War II, in the process becoming on the whole a reliable member of the international community. From the late 1970s onwards, however, as Japan’s economy continued to rise, this premise began to be questioned. By the late 1980s, a new ‘Japan Problem’ had been identified in Western countries, although the presentation of Japan as a dangerous ‘other’ was nevertheless familiar from past historical eras. The term ‘Japan-bashing’ was used by opponents of this negative view to suggest that much of the critical rhetoric about a ‘Japan Problem’ could be reduced to an unwarranted, probably racist, assault on Japan. This thesis argues that the invention and popularisation of the highly-contested label ‘Japan-bashing’, rather than averting criticism of Japan, perversely helped to exacerbate and transform the moderate anti-Japanese sentiment that had existed in Western countries in the late 1970s and early 1980s into a widely disseminated, heavily politicised and even encultured phenomenon in the late 1980s and 1990s. Moreover, when the term ‘Japan-bashing’ spread to Japan itself, Japanese commentators were quick to respond. In fact, the level and the nature of the response from the Japanese side is one crucial factor that distinguishes ‘Japan-bashing’ in the 1980s and 1990s from anti-Japanese sentiment expressed in the West in earlier periods. Ultimately, the label and the practice of ‘Japan-bashing’ helped to transform intellectual and popular discourses about Japan in both Western countries and Japan itself in the 1980s and 1990s. Moreover, in doing so, it revealed crucial features of wider Western and Japanese perceptions of the global order in the late twentieth century. Debates about Japan showed, for example, that economic strength had become at least as important as military power to national discourses about identity. However, the view that Western countries and Japan are generally incompatible, and share few, if any, common values, interests or goals, has been largely discarded in the early twenty-first century, in a process that demonstrated just how constructed, and transitory, such views can be.
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6

Zharkova, Valentina V., J. Aboudarham, Sergei I. Zharkov, Stanley S. Ipson, Ali K. Benkhalil y N. Fuller. "Solar Feature Catalogues in EGSO". Springer, 2005. http://hdl.handle.net/10454/4032.

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no
The Solar Feature Catalogues (SFCs) are created from digitized solar images using automated pattern recognition techniques developed in the European Grid of Solar Observation (EGSO) project. The techniques were applied for detection of sunspots, active regions and filaments in the automatically standardized full-disk solar images in Caii K1, Caii K3 and H¿ taken at the Meudon Observatory and white-light images and magnetograms from SOHO/MDI. The results of automated recognition are verified with the manual synoptic maps and available statistical data from other observatories that revealed high detection accuracy. A structured database of the Solar Feature Catalogues is built on the MySQL server for every feature from their recognized parameters and cross-referenced to the original observations. The SFCs are published on the Bradford University web site http://www.cyber.brad.ac.uk/egso/SFC/ with the pre-designed web pages for a search by time, size and location. The SFCs with 9 year coverage (1996¿2004) provide any possible information that can be extracted from full disk digital solar images. Thus information can be used for deeper investigation of the feature origin and association with other features for their automated classification and solar activity forecast.
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7

Lazǎr, Vlad-Andrei. "Reconstruction of the surface of the Sun from stereoscopic images". Thèse, 2007. http://hdl.handle.net/1866/7228.

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Chang, Tsai-cheng y 張財誠. "Tracking Clouds and Predicting occlusion of Sun in All-Sky Images". Thesis, 2014. http://ndltd.ncl.edu.tw/handle/96220259133671815272.

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碩士
國立中央大學
資訊工程學系
102
In recent years, due to the excessive use of the fossil energy, carbon emissions have caused the global climate warming. In order to reduce the carbon emissions, countries around the world committed to the development of green energy which includes solar power, wind power and hydropower. In Taiwan, research of the solar power gets more attention gradually. But the solar irradiance would change dramatically due to season, time, weather and occlusion of clouds. These factors may cause the worries on the reliability of the solar power system. And forecasting short-term irradiance is important for the operators to manage and allocate resources. In our research, we use the image processing technology to analyze the all-sky images, and use the analysis results to predict the occlusive situation between sun and clouds. The prediction would help increase the reliability of the short-term solar irradiance forecasting. In our research, we read the all-sky images and detect the area of clouds in the images as a mask first. Then, we use the image difference to get the motion region. Applying the cloud mask to motion region, we can get the cloud motion region in the images. Afterwards, we use the cloud motion region to detect the feature points. Then the feature points will be clustered by a clustering algorithm. After obtaining the clustering results, we perform tracking of feature clusters in continuous images. After tracking, we use the tracking information to calculate the feature vector. Then, we use this vector to train the predictive model. Finally, we do the prediction and validate the results with the ground truth. And we get a good performance that the prediction accuracy is higher than 85%.
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Fischer, Mark G. "Oceanographic analysis of sun glint images taken on space shuttle mission STS 41-G". Thesis, 1986. http://hdl.handle.net/10945/22009.

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Ahmed, Omar W., Rami S. R. Qahwaji, Tufan Colak, De Wit T. Dudok y Stanley S. Ipson. "A New Technique for the Calculation and 3D Visualisation of Magnetic Complexities on Solar Satellite Images". 2010. http://hdl.handle.net/10454/7600.

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Yes
In this paper, we introduce two novel models for processing real-life satellite images to quantify and then visualise their magnetic structures in 3D. We believe this multidisciplinary work is a real convergence between image processing, 3D visualization and solar physics. The first model aims to calculate the value of the magnetic complexity in active regions and the solar disk. A series of experiments are carried out using this model and a relationship has been indentified between the calculated magnetic complexity values and solar flare events. The second model aims to visualise the calculated magnetic complexities in 3D colour maps in order to identify the locations of eruptive regions on the Sun. Both models demonstrate promising results and they can be potentially used in the fields of solar imaging, space weather and solar flare prediction and forecasting.
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Libros sobre el tema "Sun-images"

1

Shah, Priyabala. The sun images. New Delhi: Aditya Prakashan, 1996.

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Seboni, Barolong. Images of the sun. Madison, Wis: African Studies Program of the University of Wisconsin-Madison, 1986.

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3

University of Southwestern Louisiana. University Art Museum., ed. Baking in the sun: Visionary images from the south. Lafayette: University Art Museum, University of Southwestern Louisiana, 1987.

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DiGirolamo, Mario. Sole e ombra =: Sun and shadow : images of Italy. Atlanta, Ga: M. DiGirolamo, 2000.

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Authority, Health Education, ed. Burning issues: Magazine coverage of information and images regarding sun protection. London: Health Education Authority, 1997.

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6

Louis XIV outside in: Images of the Sun King beyond France, 1661-1715. Farnham, Surrey, UK, England: Ashgate Publishing Company, 2015.

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service), SpringerLink (Online, ed. New Eyes on the Sun: A Guide to Satellite Images and Amateur Observation. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012.

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8

From the rising of the sun: English images of the Ottoman Empire to 1715. New York: P. Lang, 1987.

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9

Alexandra, Lytton Regalado, ed. El sol aún sonrie: Imagenes Salvadoreñas de los terremotos del 2001 = The sun still smiles : Salvadoran images of the 2001 earthquakes. San Salvador, El Salvador, Centro América: Museo de Arte Moderno de El Salvador, 2001.

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Sun Valley Images. Stoecklein Publishing, 2002.

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Capítulos de libros sobre el tema "Sun-images"

1

Wilkinson, John. "Satellite Images of the Sun". En Astronomers' Universe, 153–74. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-22839-1_7.

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2

Tollestrup, E. V., G. G. Fazio, J. Woolaway, J. Blackwell y K. Brecher. "Infrared Images of the Sun During the July 11, 1991 Solar Eclipse". En Infrared Solar Physics, 179–83. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-1926-9_23.

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Johnson, Allan. "Sun-Worship and the Idolatry of Images: Derek Jarman, Philip Glass, and The Swimming-Pool Library". En Alan Hollinghurst and the Vitality of Influence, 31–60. London: Palgrave Macmillan UK, 2014. http://dx.doi.org/10.1057/9781137362032_3.

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Neff, J. E. y D. H. Neff. "Spectral images of the chromospheres of AR Lacertae". En Cool Stars, Stellar Systems, and the Sun, 531–35. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/3-540-18653-0_194.

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Theys, Céline y Claude Aime. "Reconstructing Images in Astrophysics, an Inverse Problem Point of View". En Cartography of the Sun and the Stars, 1–23. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-24151-7_1.

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Donati, J. F. y M. Semel. "Towards magnetic images of rapidly rotating late-type stars". En The Sun and Cool Stars: activity, magnetism, dynamos, 326–29. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/3-540-53955-7_149.

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Twycross, Meg. "‘As the Sun with his Beams when he is Most Bright’". En The Materials of Early Theatre: Sources, Images, and Performance, editado por Sarah Carpenter y Pamela King, 239–80. Abingdon, Oxon ; New York, NY : Routledge, 2018. | Series: Variorum collected studies series: Routledge, 2017. http://dx.doi.org/10.4324/9781315123004-9.

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Pradeep, C. L. y R. Kariyappa. "Bright Points in G-Band and Ca IIH Images from Hinode". En Magnetic Coupling between the Interior and Atmosphere of the Sun, 424–25. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-02859-5_46.

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Vogt, Steven S. y Artie P. Hatzes. "The differential rotation and evolution of spots on UX Arietis from a sequence of Doppler images". En The Sun and Cool Stars: activity, magnetism, dynamos, 295–308. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/3-540-53955-7_146.

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Amir, Ayala. "Chapter 11. “Days of Sun, Playing, and Dreams”". En Children’s Literature, Culture, and Cognition, 254–73. Amsterdam: John Benjamins Publishing Company, 2023. http://dx.doi.org/10.1075/clcc.17.11ami.

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After a brief overview of children’s photography books in Israel, this chapter focuses on photobooks that were shot in the kibbutzim. Created mostly by local photographers with an insider’s gaze, these books embody the vision of childhood in a rural, parentless environment protected from the fate of the Oedipal fall and the perils of a changing society. While promoting the vision of the kibbutz by documenting children’s everyday life, some of these books tap into the loss and deprivation in the realized utopia of the kibbutz. The three case studies discussed in the chapter, published between 1961–1968, present various interactions between photographer and writer, images and words, that yielded intricate messages. An analysis of them shows how this variant of the photobook exploited the qualities of the medium and the genre, which combine realism and nostalgia, in order to reveal the underlying tensions in the kibbutz’s vision and way of life.
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Actas de conferencias sobre el tema "Sun-images"

1

Berresheim, Arne y Antonio Agudo. "Photovoltaic Power Forecasting Using Sky Images and Sun Motion". En ICASSP 2024 - 2024 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP). IEEE, 2024. http://dx.doi.org/10.1109/icassp48485.2024.10448183.

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Chainais, Pierre, Véronique Delouille y Jean-François Hochedez. "Modeling images of the Quiet Sun in the extreme ultraviolet". En Optical Engineering + Applications, editado por Dimitri Van De Ville, Vivek K. Goyal y Manos Papadakis. SPIE, 2007. http://dx.doi.org/10.1117/12.731211.

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Mantel, Claire, Gisele A. dos Reis Benatto, Nicholas Riedel, Sune Thorsteinsson, Peter B. Poulsen, Harsh Parikh, Sergiu Spataru, Dezso Sera y Soren Forchhammer. "SNR Study of Outdoor Electroluminescence Images under High Sun Irradiation". En 2018 IEEE 7th World Conference on Photovoltaic Energy Conversion (WCPEC) (A Joint Conference of 45th IEEE PVSC, 28th PVSEC & 34th EU PVSEC). IEEE, 2018. http://dx.doi.org/10.1109/pvsc.2018.8548264.

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Duan, Puhong, Jian Kang, Xudong Kang, Pedram Ghamisi y Shutao Li. "Sun Glint Removal of Hyperspectral Images via Texture-Aware Total Variation". En IGARSS 2020 - 2020 IEEE International Geoscience and Remote Sensing Symposium. IEEE, 2020. http://dx.doi.org/10.1109/igarss39084.2020.9323871.

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Terren-Serrano, Guillermo y Manel Martinez-Ramon. "Wind Flow Estimation in Thermal Sky Images for Sun Occlusion Prediction". En 2021 IEEE PES Innovative Smart Grid Technologies Europe (ISGT Europe). IEEE, 2021. http://dx.doi.org/10.1109/isgteurope52324.2021.9640045.

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Mallmann, A. James. "Solar Eclipses and Elementary Electronics: A Project Involving Experimental Observations and Mathematical Analysis". En Light and Color in the Open Air. Washington, D.C.: Optica Publishing Group, 1997. http://dx.doi.org/10.1364/lcoa.1997.lpdp.2.

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For the annular solar eclipse of May 10, 1994, we set up two telescopes to produce projected images of the eclipsing sun at a location adjacent to the main engineering building at the Milwaukee School of Engineering campus. Although we did not promote the event in any way, well over one hundred students, faculty, and staff gathered spontaneously to view the images of the eclipsing sun.
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Vahtmae, Ele y Tiit Kutser. "Sun glint correction of airborne AISA images for mapping shallow-water benthos". En 2008 IEEE/OES US/EU-Baltic International Symposium (BALTIC). IEEE, 2008. http://dx.doi.org/10.1109/baltic.2008.4625522.

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Linskens, Jeffery y Craig F. Bohren. "The appearance of the Sun through clouds". En OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1992. http://dx.doi.org/10.1364/oam.1992.fl5.

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When the Sun or Moon can be seen through clouds, the edge is usually sharp and well defined. Less frequently, but not rarely, the edge will appear hazy or fuzzy through dense cirrus or cirrostratus clouds. Both phenomena have been photographed, and the cloud types associated with each sighting have been analyzed. Simple experiments involving a luminous disk and a variety of scatterers and optical depths have been performed to create both hazy and sharp images. Also, Monte Carlo techniques have been used to investigate under what conditions multiple scattering by clouds can cause the hazy image of the Sun. How horizontal inhomogeneity in clouds on a scale less than the solid angle of the Sun affects the image observed has also been investigated.
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Chu, Mengru y huaguo zhang. "Comparison experiment of sun glint correction method for nearshore high-resolution multispectral satellite images". En Ocean Optics and Information Technology, editado por Jianquan Yao, Renhe Zhang, Xuelong Li, Hao Yin, Lixin Wu y Zhongliang Zhu. SPIE, 2018. http://dx.doi.org/10.1117/12.2505595.

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Barreiro, Evan, Neal Carter y Alireza Hashemian. "Validating the Sun System in Blender for Recreating Shadows". En WCX SAE World Congress Experience. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2024. http://dx.doi.org/10.4271/2024-01-2476.

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<div class="section abstract"><div class="htmlview paragraph">Shadow positions can be useful in determining the time of day that a photograph was taken and determining the position, size, and orientation of an object casting a shadow in a scene. Astronomical equations can predict the location of the sun relative to the earth, and therefore the position of shadows cast by objects, based on the location’s latitude and longitude as well as the date and time. 3D computer software have begun to include these calculations as a part of their built-in sun systems. In this paper, the authors examine the sun system in the 3D modeling software Blender to determine its accuracy for use in accident reconstruction. A parking lot was scanned using Faro LiDAR scanner to create a point cloud of the environment. A camera was then set up on a tripod at the environment and photographs were taken at various times throughout the day from the same location in the environment. This environment was then 3D modeled in Blender based on the point cloud, and the sun system in Blender was set up using the date and time of the photographs. The photographs from the environment were then undistorted and aligned to the 3D environment using photogrammetry techniques, and images were rendered in the same positions to compare the shadows in Blender’s Cycles render engine to the photographs. Through this process, the authors determined that Blender’s sun system recreates the sun position adequately, and can be used to accurately determine the location and dimensions of shadows cast by objects of known dimensions and location.</div></div>
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Informes sobre el tema "Sun-images"

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Branduardi-Raymont, Graziella y et al. SMILE Definition Study Report. ESA SCI, diciembre de 2018. http://dx.doi.org/10.5270/esa.smile.definition_study_report-2018-12.

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The SMILE definition study report describes a novel self-standing mission dedicated to observing solar wind-magnetosphere coupling via simultaneous in situ solar wind/magnetosheath plasma and magnetic field measurements, X-Ray images of the magnetosheath and magnetic cusps, and UV images of global auroral distributions defining system-level consequences. The Solar wind Magnetosphere Ionosphere Link Explorer (SMILE) will complement all solar, solar wind and in situ magnetospheric observations, including both space- and ground-based observatories, to enable the first-ever observations of the full chain of events that drive the Sun-Earth connection.
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