Relevant bibliographies by topics / Shadow ring

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Shadow ring'

Author: Grafiati
Published: 4 June 2021
Last updated: 2 February 2022

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Journal articles on the topic "Shadow ring"

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Muro-Arena, G. A., M. Benisty, C. Ginski, C. Dominik, S. Facchini, M. Villenave, R. van Boekel, et al. "Shadowing and multiple rings in the protoplanetary disk of HD 139614." Astronomy & Astrophysics 635 (March 2020): A121. http://dx.doi.org/10.1051/0004-6361/201936509.

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Context. Shadows in scattered light images of protoplanetary disks are a common feature and support the presence of warps or misalignments between disk regions. These warps are possibly caused by an inclined (sub-)stellar companion embedded in the disk. Aims. We aim to study the morphology of the protoplanetary disk around the Herbig Ae star HD 139614 based on the first scattered light observations of this disk, which we model with the radiative transfer code MCMax3D. Methods. We obtained J- and H-band observations that show strong azimuthal asymmetries in polarized scattered light with VLT/SPHERE. In the outer disk, beyond ~30 au, a broad shadow spans a range of ~240 deg in position angle, in the east. A bright ring at ~16 au also shows an azimuthally asymmetric brightness, with the faintest side roughly coincidental with the brightest region of the outer disk. Additionally, two arcs are detected at ~34 and ~50 au. We created a simple four-zone approximation to a warped disk model of HD 139614 in order to qualitatively reproduce these features. The location and misalignment of the disk components were constrained from the shape and location of the shadows they cast. Results. We find that the shadow on the outer disk covers a range of position angles too wide to be explained by a single inner misaligned component. Our model requires a minimum of two separate misaligned zones – or a continuously warped region – to cast this broad shadow on the outer disk. A small misalignment of ~4° between adjacent components can reproduce most of the observed shadow features. Conclusions. Multiple misaligned disk zones, potentially mimicking a warp, can explain the observed broad shadows in the HD 139614 disk. A planetary mass companion in the disk, located on an inclined orbit, could be responsible for such a feature and for the dust-depleted gap responsible for a dip in the SED.
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Sánchez, G., A. Serrano, M. L. Cancillo, and J. A. García. "Comparison of shadow-ring correction models for diffuse solar irradiance." Journal of Geophysical Research: Atmospheres 117, no. D9 (May 9, 2012): n/a. http://dx.doi.org/10.1029/2011jd017346.

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Petit, Charles. "Silhouette: Scientists attempt to image a shadow and its tumultuous ring." Science News 178, no. 8 (September 29, 2010): 22–26. http://dx.doi.org/10.1002/scin.5591780822.

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Vartiainen, Eero. "An anisotropic shadow ring correction method for the horizontal diffuse irradiance measurements." Renewable Energy 17, no. 3 (July 1999): 311–17. http://dx.doi.org/10.1016/s0960-1481(98)00756-3.

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Aguirre-Pablo, Andres A., Kenneth R. Langley, and Sigurdur T. Thoroddsen. "High-Speed Time-Resolved Tomographic Particle Shadow Velocimetry Using Smartphones." Applied Sciences 10, no. 20 (October 13, 2020): 7094. http://dx.doi.org/10.3390/app10207094.

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The video-capabilities of smartphones are rapidly improving both in pixel resolution and frame-rates. Herein we use four smartphones in the “slow-mo” option to perform time-resolved Tomographic Particle Shadow Velocimetry of a vortex ring, using 960 fps. We use background LED-illuminated diffusers, facing each camera, for shadow particle imaging. We discuss in-depth the challenges present in synchronizing the high-speed video capture on the smartphones and steps to overcome these challenges. The resulting 3-D velocity field is compared to an instantaneous, concurrent, high-resolution snapshot with four 4k-video cameras using dual-color to encode two time-steps on a single frame. This proof-of-concept demonstration, supports realistic low-cost alternatives to conventional 3-D experimental systems.
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Huang, Yang, Yi-Ping Dong, and Dao-Jun Liu. "Revisiting the shadow of a black hole in the presence of a plasma." International Journal of Modern Physics D 27, no. 12 (September 2018): 1850114. http://dx.doi.org/10.1142/s0218271818501146.

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We study the photon’s motion around a black hole in the presence of a plasma whose density is a function of the radius coordinate by a renewed ray-tracing algorithm and investigate the influence of the plasma on the shadow of the black hole. The presence of plasma affects not only the size but also the shape of the black hole shadow. Furthermore, the influence of plasma on trajectories of photons depends on the frequency of the photons. For the high-frequency photons, the influence is negligible, on the contrary, the trajectories of low-frequency photons are affected significantly by the plasma. Interestingly, it is also found that the black hole image would take on a multi-ring structure due to the presence of plasma.
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de Oliveira, Amauri P., Antonio J. Machado, and João F. Escobedo. "A New Shadow-Ring Device for Measuring Diffuse Solar Radiation at the Surface." Journal of Atmospheric and Oceanic Technology 19, no. 5 (May 2002): 698–708. http://dx.doi.org/10.1175/1520-0426(2002)019<0698:ansrdf>2.0.co;2.

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Johnson, Michael D., Alexandru Lupsasca, Andrew Strominger, George N. Wong, Shahar Hadar, Daniel Kapec, Ramesh Narayan, et al. "Universal interferometric signatures of a black hole’s photon ring." Science Advances 6, no. 12 (March 2020): eaaz1310. http://dx.doi.org/10.1126/sciadv.aaz1310.

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The Event Horizon Telescope image of the supermassive black hole in the galaxy M87 is dominated by a bright, unresolved ring. General relativity predicts that embedded within this image lies a thin “photon ring,” which is composed of an infinite sequence of self-similar subrings that are indexed by the number of photon orbits around the black hole. The subrings approach the edge of the black hole “shadow,” becoming exponentially narrower but weaker with increasing orbit number, with seemingly negligible contributions from high-order subrings. Here, we show that these subrings produce strong and universal signatures on long interferometric baselines. These signatures offer the possibility of precise measurements of black hole mass and spin, as well as tests of general relativity, using only a sparse interferometric array.
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Beauchez, Jérôme. "In the Shadow of the Other: Boxing, Everyday Struggles and the Feeling of Strangeness." Sociology 50, no. 6 (July 11, 2016): 1170–84. http://dx.doi.org/10.1177/0038038515587638.

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On the basis of an ethnography of a group of boxers, this article questions pugilism as an experience of confrontation with the other, the reasons and effects of which lie beyond the ring. Using the boxers’ words to explain their everyday struggles, this article seeks to describe fighting figures by placing them in the full depth of their biographical paths. These boxers share the experience of immigration and their life stories have all been marked by profound feelings of strangeness, understood as a social disqualification of otherness that causes deep and private wounds. Like the shadow of the other, hanging over the ‘conversations of gestures’, the boxers’ wounds and the violence of their biographical paths can help explain how they experience their fights, through the idea of a bodily response to all the hardships they have endured, well beyond the ring and its rounds.
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Barkhudarov, E. M., M. O. Mdivnishvili, I. V. Sokolov, M. I. Taktakishvili, and V. E. Terekhin. "Mach reflection of a ring shock wave from the axis of symmetry." Journal of Fluid Mechanics 226 (May 1991): 497–509. http://dx.doi.org/10.1017/s0022112091002483.

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The paper is devoted to the theoretical and experimental investigation of the ring (toroidal) shock wave near the axis of symmetry. The theoretical approach is based upon the Chester–Chisnell–Whitman method. The experimental toroidal shock wave is generated by a novel inducer and visualized by the shadow technique. Attention is paid to the manner of reflection of the shock wave from the axis of symmetry. This reflection appears to be irregular even at small distances from the centre of the ring. This phenomenon is due to the cumulative acceleration of the converging axisymmetric shock front near the axis. The acceleration results in an increase in the incidence angle up to that characteristic of Mach (irregular) reflection.
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Dissertations / Theses on the topic "Shadow ring"

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DeRose, R. Justin, and Richard S. Gardner. "Technique To Improve Visualization Of Elusive Tree-Ring Boundaries In Aspen (Populus tremuloides)." Tree-Ring Society, 2010. http://hdl.handle.net/10150/622613.

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A simple, quick, and inexpensive technique to improve visualization of aspen (Populus tremuloides) tree rings under the microscope, the ‘shadow technique’, is described. The technique assumes appropriate preparation of increment cores or cross-sections and works well on the lighter portions of the sample with fungus- and bacteria-free wood. The shadow technique was used successfully to elucidate tree-ring boundaries in small diameter (<5 cm DBH) aspen from northern Utah that commonly had >100 annual rings. Crossdating verified whether the elusive rings were missing or false rings. Aspen tree-ring measurement will be greatly enhanced with the shadow technique and preliminary investigation suggests it could be used on other species such as curlleaf mountain mahogany (Cercocarpus ledifolius).
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Drechmer, Patricia Aparecida de Oliveira. "Comportamento e correção da radiação solar difusa obtida com o anel de sombreamento." Universidade Estadual do Oeste do Parana, 2005. http://tede.unioeste.br:8080/tede/handle/tede/389.

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Made available in DSpace on 2017-05-12T14:48:28Z (GMT). No. of bitstreams: 1 Patricia de Oliveira Drechmer.pdf: 703873 bytes, checksum: c5f64d1a8f42cf596ce9e2edd113b6b8 (MD5) Previous issue date: 2005-08-01
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This paper shows the comportment of solar radiation global, direct and diffuse radiation at Cascavel, classifies the sky s cover in function of the cloudiness index and studies the applicability of the numeric correction of RICIERI (1998) on diffuse radiation measured with a shadow ring. The research was done at meteorological experimental station of UNIOESTE, Cascavel. The solar radiation components were monitored from January 03, 2001 to February 14, 2003. The global radiation was monitored by a pyranometer KIPP & ZONEN-CM3 and the direct radiation were monitored by a pyrheliometer EPPLEY-NIP coupled to a solar tracer. The diffuse radiation was monitored by the difference between global radiation and direct radiation projected over the horizontal surface and by a pyranometer covered by a shadow ring. The monthly average levels of the global, direct and diffuse irradiations were 51,8%, 31,7% and 20,17% of the irradiation over the atmosphere s top. The diffuse irradiation measured by the difference method and by the shadow ring method corrected by DRUMMOND s factor and compared through the relative daily deviation. It was observed that, in 94% of the days, the diffuse radiation by DRUMMOND s factor was lower than the difference method. The deviations were higher for cloudless days (19,82%), than for partially cloudy days (9,55%) and cloudy days (2,68%). The RICIERI s correction (1998), that proposes the correlation of diffuse irradiation without correction with the diffuse irradiation by the difference method, was used and the linear function Rd=0,16545+1,21715R d was found to correct the diffuse by the shadow ring method. This correction increases the precision of the diffuse fraction obtained by shadow ring, decreasing the average relative deviation from 11,79%, when the DRUMMOND s correlation was applied, to 7,37%. In order to increase the model s precision, it was proposed the partial numeric equation fitted in function of the sky s cover. It was verified decrease mean values of relative deviation, when compared with the DRUMMOND s correction: 4,8% in cloudless sky, 4,66% in partially cloudy sky and, 4,6% in cloudy sky. The average relative deviation was 4,68%. The diffuse solar radiation measured on Cascavel-PR and corrected by RICIERI s numeric function, determined to region of Botucatu - SP, shows relative deviation to cloudy sky, partially cloudy sky and cloudless sky, respectively, 4,6%, 4,8% and 5,29%, suggesting that the functions developed to Botucatu - SP tend to be independent from the locality.
O presente estudo caracteriza o comportamento da radiação solar global, direta e difusa na cidade de Cascavel, classifica o tipo de cobertura do céu em função do índice de claridade e avalia a aplicabilidade da função numérica de RICIERI (1998) na correção da radiação solar difusa obtida com do anel de sombreamento. As componentes da radiação solar foram monitoradas durante o período de 3 de janeiro de 2001 a 14 de fevereiro de 2003 na Estação Experimental Agrometeorológica da UNIOESTE, Campus de Cascavel. Na medição da radiação global e difusa foi utilizado um piranômetro KIPP & ZONEN-CM3 e para medir a componente direta foi utilizado um pireliômetro EPPLEY-NIP acoplado a um rastreador solar. A radiação difusa foi monitorada de duas formas: através da diferença entre a radiação global e a radiação direta projetada no plano horizontal e através de um piranômetro sombreado por um anel. Os níveis médios mensais das irradiações global, direta na incidência e difusa, foram respectivamente, 51,8%, 31,7% e 20,17% da radiação incidente no topo da atmosfera. Os níveis da irradiação difusa medidos pelo método da diferença e anel de sombreamento corrigido pelo fator de DRUMMOND (1956) foram monitorados e comparados utilizando o desvio relativo diário. Foi verificado que, em 94% dos dias, a radiação difusa corrigida por DRUMMOND foi inferior à obtida pelo método padrão. Os desvios são maiores para dias de céu limpo (19,82%), que para céu parcialmente nublado (9,55%) ou nublado (2,68%). Foi empregado o método de correção sugerido por RICIERI (1998), que propõe a correlação entre a irradiação difusa sem correção e a irradiação difusa de referência, e a função numérica linear Rd=0,16545+1,21715R d foi proposta. Essa correlação melhora em cerca de 37% a correção da fração difusa, diminuindo o desvio relativo médio de 11,79%, calculado para o método de DRUMMOND, para 7,37%. As funções numéricas parciais, propostas em função do tipo de cobertura do céu, diminuem significativamente o valor do desvio relativo médio, quando comparada ao fator de correção de DRUMMOND: 4,80% para céu limpo, 4,66% para céu parcialmente nublado e 4,60% para céu nublado, sendo o desvio relativo médio igual a 4,68%. A radiação solar difusa medida em Cascavel - PR e corrigida com as funções numéricas de RICIERI, determinadas para a região do município de Botucatu - SP, mostraram desvios relativos médios para dias de céu nublado, parcialmente nublado e limpo, respectivamente, 4,60%, 4,80% e 5,29%, sugerindo que estas tendem a independer da localidade.
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NGUYEN, DUC HA. "A COUPLED HYDROLOGICAL－ GEOTECHNICAL FRAMEWORK FOR FORECASTING SHALLOW LANDSLIDE HAZARD." Kyoto University, 2019. http://hdl.handle.net/2433/245320.

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Books on the topic "Shadow ring"

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Fletcher, Peggy. Why we shadow box our demons from the poetry ring. [Sarnia, Ont.]: Sydenham Press, 2010.

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Laura, Robinson. William and the magic ring: A shadow casting bedtime story. Boston: Museum of Fine Arts, 1998.

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Johansen, K. V. The shadow road. Victoria, B.C: Orca Book Publishers, 2010.

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Searle, Michael. The Lord of the rings online: Shadows of Angmar. Roseville, Calif: Prima Publ., 2007.

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Tolkien, J. R. R. The return of the shadow. London: HarperCollins, 1994.

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Tolkien, J. R. R. The return of the shadow: The history of the lord of the rings. London: Unwin Hyman, 1988.

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Tolkien, J. R. R. The return of the shadow: The history of the Lord of the Rings. London: UnwinHyman, 1993.

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Tolkien, J. R. R. The return of the shadow: The history of The lord of the rings, part one. London: Unwin Hyman, 1988.

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Tolkien, J. R. R. The return of the shadow: The history of The lord of the rings, part one. Boston: Houghton Mifflin, 1988.

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Tolkien, J. R. R. The return of the shadow: The history of The Lord of the rings, part one. London: Unwin Paperbacks, 1990.

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Book chapters on the topic "Shadow ring"

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Yde, Matthew. "Utopia in Flames: Shaw and Wagner’s Ring: The Perfect Wagnerite." In Bernard Shaw and Totalitarianism, 46–65. London: Palgrave Macmillan UK, 2013. http://dx.doi.org/10.1057/9781137330208_3.

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Berg, S., E. Jeppesen, M. Søndergaard, and E. Mortensen. "Environmental effects of introducing whitefish, Coregonus lavaretus (L.), in Lake Ring." In Nutrient Dynamics and Biological Structure in Shallow Freshwater and Brackish Lakes, 71–79. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-017-2460-9_7.

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Briffa, K. R. "Grasping At Shadows? A Selective Review of the Search for Sunspot-Related Variability in Tree Rings." In The Solar Engine and Its Influence on Terrestrial Atmosphere and Climate, 417–35. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-79257-1_26.

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Walker, P. M. "UKOOA Recommended Procedures for Mobile Drilling Rig Site Surveys (Geophysical and Hydrographic) — Shallow Gas Aspects." In Advances in Underwater Technology, Ocean Science and Offshore Engineering, 257–89. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0669-3_13.

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"Chapter Four: Being’s Tragedy: Heidegger’s Silence and the Ring of Solitude." In The Duplicity of Philosophy's Shadow, 109–30. Columbia University Press, 2018. http://dx.doi.org/10.7312/wolf18562-005.

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Dickens, Charles. "Chapter VII Whelp-Hunting." In Hard Times. Oxford University Press, 2008. http://dx.doi.org/10.1093/owc/9780199536276.003.0038.

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Before the ring formed round the Old Hell Shaft was broken, one figure had disappeared from within it. Mr. Bounderby and his shadow had not stood near Louisa, who held her father’s arm, but in a retired place by themselves. When Mr. Gradgrind was...
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Korngold, Julius, and Bryan Gilliam. "“Give up your plans of coming home”: Letters of a Viennese Father to His Son." In Korngold and His World, edited by Kevin C. Karnes, translated by Elisabeth Staak, 233–46. Princeton University Press, 2019. http://dx.doi.org/10.23943/princeton/9780691198293.003.0012.

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This chapter presents some correspondence between Erich Korngold and his father, Julius. These letters reflect a tumultuous, even dangerous time for Erich and his extended family. The famed Viennese opera composer had had a prestigious career on the international musical stage with such works as Der Ring des Polykrates and Violanta (both 1916), which premiered in Munich when he was only nineteen years old. Die tote Stadt was so highly anticipated that it received an unusual double premiere in Hamburg and Cologne on December 4, 1920; the Vienna premiere followed shortly thereafter, with Richard Strauss congratulating the composer backstage after each act. And yet, as the chapter shows, Adolf Hitler cast a large shadow over Austria in the early 1930s, and Julius repeatedly urged his son to remain in the United States.
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Saran, Swami. "Ring Footings." In Shallow Foundations and Soil Constitutive Laws, 200–240. CRC Press, 2017. http://dx.doi.org/10.1201/9781351241298-9.

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Jenkins, Paul F. "Pulmonary infiltrates, nodular lesions, ring shadows and calcification." In Making Sense of the Chest X-ray, 75–112. CRC Press, 2013. http://dx.doi.org/10.1201/b14993-4.

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"Pulmonary infiltrates, nodular lesions, ring shadows and calcification." In Making Sense of the Chest X-ray, 105–48. CRC Press, 2012. http://dx.doi.org/10.1201/b13382-8.

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Conference papers on the topic "Shadow ring"

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Zhao, Jiuling. "Defect Detection of Solid Rocket Motor Based on Improved Ring Shadow Suppression Algorithm." In AICS 2019: 2019 International Conference on Artificial Intelligence and Computer Science. New York, NY, USA: ACM, 2019. http://dx.doi.org/10.1145/3349341.3349488.

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Gwinner, Michael C., Elisabeth Koroknay, Liwei Fu, Piotr Patoka, Witold Kandulski, Michael Giersig, and Harald Giessen. "Periodic large-area metallic split-ring resonator metamaterial fabrication based on shadow nanosphere lithography." In 11th European Quantum Electronics Conference (CLEO/EQEC). IEEE, 2009. http://dx.doi.org/10.1109/cleoe-eqec.2009.5191789.

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Kudish, Avraham I., and Efim G. Evseev. "The evaluation of four different diffuse radiation correction models applied to shadow ring measurements for Beer Sheva, Israel." In Solar Energy + Applications, edited by Daryl R. Myers. SPIE, 2007. http://dx.doi.org/10.1117/12.731555.

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Hafner, Ronald S., Gerald C. Mok, and Lisle G. Hagler. "Drop Test Results for the Combustion Engineering Model No. ABB-2901 Fuel Pellet Shipping Package." In ASME/JSME 2004 Pressure Vessels and Piping Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/pvp2004-2788.

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The U.S. Nuclear Regulatory Commission (USNRC) contracted with the Packaging Review Group (PRG) at Lawrence Livermore National Laboratory (LLNL) to conduct a single, 30-ft shallow-angle drop test on the Combustion Engineering ABB-2901 drum-type shipping package. The purpose of the test was to determine if bolted-ring drum closures could fail during shallow-angle drops. The PRG at LLNL planned the test, and Defense Technologies Engineering Division (DTED) personnel from LLNL’s Site-300 Test Group executed the plan. The test was conducted in November 2001 using the drop-tower facility at LLNL’s Site 300. Two representatives from Westinghouse Electric Company in Columbia, South Carolina (WEC-SC); two USNRC staff members; and three PRG members from LLNL witnessed the preliminary test runs and the final test. The single test clearly demonstrated the vulnerability of the bolted-ring drum closure to shallow-angle drops—the test package’s drum closure was easily and totally separated from the drum package. The results of the preliminary test runs and the 30-ft shallow-angle drop test offer valuable qualitative understandings of the shallow-angle impact. • A drum package with a bolted-ring closure may be vulnerable to closure failure by the shallow-angle drop, even if results of the steep-angle drop demonstrate that the package is resistant to similar damage. • Although there exist other mechanisms, the shallow-angle drop produces closure failure mainly by buckling the drum lid and separating the drum lid and body, which the bolted ring cannot prevent. • Since the closure failure by the shallow-angle drop is generated mainly by structural instabilities of a highly discontinuous joint, the phenomenon can be rather unpredictable. Thus, a larger-than-normal margin of safety is recommended for the design of such packages. • The structural integrity of the bolted-ring drum closure design depends on a number of factors. To ensure that the drum closure survives the shallow-angle drop, the following general qualitative rules should be observed: – The drum closure components should be quality products made of ductile materials, and the torque value for tightening the bolted ring should be included in the SAR and operating procedures to ensure quality. – The package should not be too heavy. – The package internal structure should be impact-absorbent and resistant to disintegration and collapse under high compressive load. However, a strong internal structure may defeat the purpose of protecting the containment vessel from damage during a free drop. • If not previously tested, drum packages with bolted-ring drum closures should be drop-tested at shallow angles. Due to the unpredictable nature of the behavior, the demonstration should be completed by test and on a case-by-case basis. The test plan should take into account the behavior’s sensitivity to the details of the package design and the impact condition. • Because the shallow-angle drop can open the drum closure, organizations using these types of drum packages should assess the consequences of exposing the radioactive contents in the containment vessel to unconsidered external elements or conditions. This work was supported by the United States Nuclear Regulatory Commission under a Memorandum of Understanding with the United States Department of Energy, and performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract W-7405-Eng-48.
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Katayama, Toru, Yusuke Yamamoto, Taishi Morimoto, and Masahiro Goto. "Motion Characteristics of a Spar-Buoy With Ring-Fin Motion Stabilizer in Deep Sea." In ASME 2020 39th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/omae2020-18595.

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Abstract The main topics of this paper is the investigation of motion characteristics of the spar-buoy with ring fin motion stabilizer, which is developed to use as a platform for wind observation with a doppler lidar in shallow sea, some mooring conditions to apply it for deep sea. Four different mooring conditions are applied the spar-buoy and it motion in a designed sever wave condition are measured in the towing tank of Osaka Prefecture University. The results show that the amplitude of pitching in deep sea is smaller than the results in shallow sea, even if the wave condition in deep sea are severer than that in shallow sea. From further investigation about the effects of four different mooring conditions on motion characteristics, it has that the center of pitching at four mooring conditions are almost same but the amplitude of pitching is smaller by changing the mooring point and the intermediate sinker position.
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Ponchak, George E., Jennifer L. Jordan, and Maximilian C. Scardelletti. "Ring resonator for detection of melting brine under shallow subsurface of Mars." In 2016 IEEE Aerospace Conference. IEEE, 2016. http://dx.doi.org/10.1109/aero.2016.7500651.

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Liu, Jianwen, Dongyun Jia, and Zhan Gao. "Static Analysis of Scale Model for Ribbed Ring Stiffened Shallow Spherical Shell." In 2018 7th International Conference on Energy and Environmental Protection (ICEEP 2018). Paris, France: Atlantis Press, 2018. http://dx.doi.org/10.2991/iceep-18.2018.58.

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Akiyama, Tomohiro, Nobuhiko Hori, Shuntaro Tanigawa, Daiju Tsuya, and Haruhiko Udono. "Fabrication of Mg2Si pn-junction photodiode with shallow mesa-structure and ring electrode." In Asia-Pacific Conference on Semiconducting Silicides and Related Materials (APAC Silicide 2016). Japan Society of Applied Physics, 2017. http://dx.doi.org/10.7567/jjapcp.5.011102.

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9

Greene, John F., and Dara Williams. "The Influence of Drilling Rig and Riser System Selection on Wellhead Fatigue Loading." In ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/omae2012-83754.

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Abstract:
With drilling and exploration activity currently high in both deep and shallow water regions rig availability and selection is an issue for operators to consider in order to achieve the desired exploration schedule. At present the industry focus is on the development of 6th generation drilling rigs with the capacity to operate in increasing deep water. However despite the focus on deepwater exploration and the associated demand for deepwater drilling rigs there still exists demand for drilling rigs that can operate in shallow to moderate water depths (100m–500m). In addition, certain field development scenarios may exist where planned water depths for drilling activities vary significantly and therefore a drilling rig and riser system is required that can operate satisfactorily in both shallow and deep water depths. For a given drill site, rig availability or well location, may be such that an operator may have to select a modern deepwater 6th generation rig for shallow water activities where a 3rd generation rig would appear to provide a better solution. Other considerations such as vessel station keeping requirements may lead to selection of a 6th generation rig over a 3rd generation rig, as the former tend to have improved DP thrusters capacity. However it is also important to note that while the 6th generation rigs may have been proven to be robust systems for operation in deep water, the response of a 6th generation drilling system in shallow water depths can be very different to that of an older 3rd generation rig and drilling riser system. Thus careful consideration must be made by the operator when considering the selection of drilling vessels for shallow to moderate water depths. Fatigue life of the wellhead is shown to be affected when one compares the response of the 6th generation and 3rd generation drilling systems in shallow to moderate depths. This also needs to be accounted for when selecting rigs for workover or intervention operations on older infrastructure. This paper presents a discussion on the various parameters such as BOP stack size, riser, flex joint and vessel design that influence the response of the drilling system in shallow to moderate water depths (100m–500m). A number of case studies and parametric studies have been carried out and the results of these are presented in order to compare the wellhead fatigue damage from the older 3rd generation systems with the 6thgeneration systems and also to identify the critical drivers for this fatigue life reduction.
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Zhang, R., Z. Ren, and S. Yu. "Fabrication and characterization of InGaAsP rectangular ring lasers with a double shallow ridge waveguide structure." In LEOS 2007 - IEEE Lasers and Electro-Optics Society Annual Meeting. IEEE, 2007. http://dx.doi.org/10.1109/leos.2007.4382375.

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Reports on the topic "Shadow ring"

1

Job, P. K., and W. R. Casey. Shadow Shields in the Storage Rings of NSLS-II. Office of Scientific and Technical Information (OSTI), July 2018. http://dx.doi.org/10.2172/1493195.

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