Academic literature on the topic 'SEP events'

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Journal articles on the topic "SEP events"

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Bao, Baoleerqimuge, and Guoyu Ren. "Sea-Effect Precipitation over the Shandong Peninsula, Northern China." Journal of Applied Meteorology and Climatology 57, no. 6 (2018): 1291–308. http://dx.doi.org/10.1175/jamc-d-17-0200.1.

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AbstractSea-effect precipitation (SEP) over the Shandong Peninsula is a unique climatological phenomenon in mainland China, and it exerts a considerable impact on the southern shore of the Bohai Sea. From observed data from 123 stations for the period 1962–2012, the characteristics of cold-season (November–February) SEP in this area were analyzed. Results showed that SEP occurred throughout the late autumn and winter. In all, 1173 SEP days were identified during the 51 years, of which snow days accounted for 73.7% and rain and snow–rain days accounted for 16.1% and 10.1%, respectively. Decembe
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Kahler, Stephen W., and Alan G. Ling. "Forecasting Solar Energetic Particle (SEP) events with Flare X-ray peak ratios." Journal of Space Weather and Space Climate 8 (2018): A47. http://dx.doi.org/10.1051/swsc/2018033.

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Solar flare X-ray peak fluxes and fluences in the 0.1–0.8 nm band are often used in models to forecast solar energetic particle (SEP) events. Garcia (2004) [Forecasting methods for occurrence and magnitude of proton storms with solar soft X rays, Space Weather, 2, S02002, 2004] used ratios of the 0.05–0.4 and 0.1–0.8 nm bands of the X-ray instrument on the GOES spacecraft to plot inferred peak flare temperatures versus peak 0.1–0.8 nm fluxes for flares from 1988 to 2002. Flares associated with E > 10 MeV SEP events of >10 proton flux units (pfu) had statistically lower peak temperatures
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Verkhoglyadova, O. P., G. Li, G. P. Zank, et al. "Understanding large SEP events with the PATH code: Modeling of the 13 December 2006 SEP event." Journal of Geophysical Research: Space Physics 115, A12 (2010): n/a. http://dx.doi.org/10.1029/2010ja015615.

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Reinard, A. A., and M. A. Andrews. "Comparison of CME characteristics for SEP and non-SEP related events." Advances in Space Research 38, no. 3 (2006): 480–83. http://dx.doi.org/10.1016/j.asr.2005.01.028.

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Dmitriev, A. V., H. C. Yeh, J. K. Chao, I. S. Veselovsky, S. Y. Su, and C. C. Fu. "Top-side ionosphere response to extreme solar events." Annales Geophysicae 24, no. 5 (2006): 1469–77. http://dx.doi.org/10.5194/angeo-24-1469-2006.

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Abstract. Strong X-flares and solar energetic particle (SEP) fluxes are considered as sources of topside ionospheric disturbances observed by the ROCSAT-1/IPEI instrument during the Bastille Day event on 14 July 2000 and the Halloween event on 28 October–4 November 2003. It was found that within a prestorm period in the dayside ionosphere at altitudes of ~600 km the ion density increased up to ~80% in response to flare-associated enhancements of the solar X-ray emission. Ionospheric response to the SEP events was revealed both at sunlit and nightside hemispheres, where the ion density increase
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Kahler, S. W., A. G. Ling, and D. V. Reames. "Spatial Evolution of 20 MeV Solar Energetic Proton Events." Astrophysical Journal 942, no. 2 (2023): 68. http://dx.doi.org/10.3847/1538-4357/aca7c0.

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Abstract The longitudinal extents of solar energetic (E > 10 MeV) particle (SEP) events in the heliosphere are a characteristic important for understanding SEP acceleration and transport as well as their space weather effects. SEP detectors on the STEREO A and B spacecraft launched in 2008, combined with those on Earth-orbiting spacecraft, have enabled recent studies of this characteristic for many events. Each SEP event distribution has been characterized by a single central longitude, width, and amplitude derived from Gaussian fits to peak intensities or fluences at each spacecraft. To ca
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Georgoulis, Manolis K., Athanasios Papaioannou, Ingmar Sandberg, et al. "Analysis and interpretation of inner-heliospheric SEP events with the ESA Standard Radiation Environment Monitor (SREM) onboard the INTEGRAL and Rosetta Missions." Journal of Space Weather and Space Climate 8 (2018): A40. http://dx.doi.org/10.1051/swsc/2018027.

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Using two heliospheric vantage points, we study 22 solar energetic particle (SEP) events, 14 of which were detected at both locations. SEP proton events were detected during the declining phase of solar cycle 23 (November 2003–December 2006) by means of two nearly identical Standard Radiation Environment Monitor (SREM) units in energies ranging between 12.6 MeV and 166.3 MeV. In this work we combine SREM data with diverse solar and interplanetary measurements, aiming to backtrace solar eruptions from their impact in geospace (i.e., from L1 Lagrangian point to Earth’s magnetosphere) to their pa
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Koldobskiy, S., O. Raukunen, R. Vainio, G. A. Kovaltsov, and I. Usoskin. "New reconstruction of event-integrated spectra (spectral fluences) for major solar energetic particle events." Astronomy & Astrophysics 647 (March 2021): A132. http://dx.doi.org/10.1051/0004-6361/202040058.

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Aims. Fluences of solar energetic particles (SEPs) are not easy to evaluate, especially for high-energy events (i.e. ground-level enhancements, GLEs). Earlier estimates of event-integrated SEP fluences for GLEs were based on partly outdated assumptions and data, and they required revisions. Here, we present the results of a full revision of the spectral fluences for most major SEP events (GLEs) for the period from 1956 to 2017 using updated low-energy flux estimates along with greatly revisited high-energy flux data and applying the newly invented reconstruction method including an improved ne
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Gopalswamy, N., S. Yashiro, S. Akiyama, et al. "Coronal mass ejections, type II radio bursts, and solar energetic particle events in the SOHO era." Annales Geophysicae 26, no. 10 (2008): 3033–47. http://dx.doi.org/10.5194/angeo-26-3033-2008.

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Abstract. Using the extensive and uniform data on coronal mass ejections (CMEs), solar energetic particle (SEP) events, and type II radio bursts during the SOHO era, we discuss how the CME properties such as speed, width and solar-source longitude decide whether CMEs are associated with type II radio bursts and SEP events. We discuss why some radio-quiet CMEs are associated with small SEP events while some radio-loud CMEs are not associated with SEP events. We conclude that either some fast and wide CMEs do not drive shocks or they drive weak shocks that do not produce significant levels of pa
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Wiedenbeck, M. E., G. M. Mason, and B. Klecker. "Isotopic Fractionation in 3He-rich SEP Events." Journal of Physics: Conference Series 1332 (November 2019): 012017. http://dx.doi.org/10.1088/1742-6596/1332/1/012017.

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Dissertations / Theses on the topic "SEP events"

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Rodríguez, Gasén Rosa. "Modelling SEP events: latitudinal and longitudinal dependence of the injection rate of shock-accelerated protons and their flux profiles." Doctoral thesis, Universitat de Barcelona, 2011. http://hdl.handle.net/10803/31855.

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Gradual SEP events is one of the greatest hazards in space environment, particularly for the launch and operation of spacecraft and for manned exploration. Predictions of their occurrence and intensity are essential to ensure the proper operation of technical and scientific instruments. However, nowadays there is a large gap between observations and models these events that can lead to predictions. This work focuses on the modelling of SEP events, particularly, on the influence of the observer's relative position and of the shock strength, on the simulated SEP flux profiles. Part I of the
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Landowski, Matthew. "DESIGN AND MODELING OF RADIATION HARDENED LATERAL POWER MOSFETS." Master's thesis, University of Central Florida, 2009. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2823.

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Galactic-cosmic-rays (GCR) exist in space from unknown origins. A cosmic ray is a very high energy electron, proton, or heavy ion. As a GCR transverses a power semiconductor device, electron-hole-pairs (ehps) are generated along the ion track. Effects from this are referred to as single-event-effects (SEEs). A subset of a SEE is single-event burnout (SEB) which occurs when the parasitic bipolar junction transistor is triggered leading to thermal runaway. The failure mechanism is a complicated mix of photo-generated current, avalanche generated current, and activation of the inherent parasitic
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Zhang, Fan. "Changing seasonality of convective events in the Labrador Sea." Thesis, Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/51896.

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The representation of deep convection in ocean models is a fundamental challenge for climate science. Here a regional simulation of the Labrador Sea circulation and convective activity obtained with the Regional Oceanic Modeling System (ROMS) over the period 1980-2009 is used to characterize the response of convection to atmospheric forcing and the variability in its seasonal cycle. This integration compares well with the sparse in time and space hydrographic surveys and ARGO data (Luo et al. 2012). It is found that convection in the convective region of the Labrador Sea has experienced variab
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Krebs-Kanzow, Uta [Verfasser]. "Air-sea interactions during glacial Heinrich events / Uta Krebs." Kiel : Universitätsbibliothek Kiel, 2008. http://d-nb.info/1019732083/34.

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Hallgren, Linnéa. "Comparison of intensified turbulence events in the Baltic Sea." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-443584.

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Turbulence is important since it affects the exchange of momentum, heat, and trace gases between the atmosphere and the ocean. However, measuring oceanic turbulence is not straightforward and that is why parameterizations that describe turbulence events are important. In this thesis turbulence data from the Baltic Sea is investigated and compared to already existing parameterizations.  The thesis considers turbulence in the ocean surface boundary layer (OSBL) and how atmospheric parameters act as driving mechanisms. Turbulence creates mixing that enables the dispersion of various particles and
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MERONI, AGOSTINO NIYONKURU. "Interactions between the ocean and extreme meteorological events." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2018. http://hdl.handle.net/10281/199143.

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Le interazioni oceano-atmosfera sono di primaria importanza sia in ambito climatico che meteorologico. Sono importanti sia su scale temporali orarie, come nell'intensificazione di cicloni tropicali, che su scale interannuali o interdecadali, come nel modo di variabilità climatica ENSO. Questa tesi si focalizza sui transferimenti di energia e quantità di moto all'interfaccia aria-mare in processi su scale temporali brevi caratterizzati da condizioni estreme. Sono presi in considerazione sia la risposta dinamica dell'oceano ad una forzante atmosferica estrema che l'effetto dello stato del mare s
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Truyen, David. "Etude par simulation composant 3D des effets singuliers SEU et SET induits par ions lourds sur le noeud technologique CMOS bulk 180 nm." Montpellier 2, 2007. http://www.theses.fr/2007MON20139.

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Hagelin, Susanna. "Effects of Upwelling Events on the Atmosphere." Thesis, Uppsala universitet, Luft-, vatten och landskapslära, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-303882.

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During an upwelling event the cold bottom-water is brought to the sea surface. This cools the atmosphere from below and the stratification becomes more stable. When the atmosphere is more stable the turbulence is reduced and, as a consequence, so are the turbulent fluxes. This study is investigating four periods of upwelling from the Östergarnsholm-site, in the Baltic Sea east of Gotland, during the summer of 2005. The air measurements are taken at a tower at the southernmost tip of Östergarnsholm while the measurements in the water are from a buoy moored 1 km south-southeast of the tower. Dur
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Benfenati, Francesco Maria. "Statistical analysis of oceanographic extreme events." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/19885/.

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Condizioni ambientali estreme del mare possono avere un forte impatto sulla navigazione e/o sul successo di operazioni di salvataggio. Le tecniche statistiche sono cruciali per quantificare la presenza di eventi estremi e monitorarne variazioni di frequenza e intensità. Gli eventi estremi "vivono" nella coda di una funzione distribuzione di probabilità (PDF), per questo è importante studiare la PDF in punti lontani diverse deviazioni standard dalla media. L’altezza significativa dell’onda (SWH) è il parametro solitamente usato per valutare l’intensità degli stati del mare. L’analisi degli es
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King, Adrian. "Terminal Palaeocene events in the North Sea and Faeroe-Shetland Basin." Thesis, University of Southampton, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274437.

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Books on the topic "SEP events"

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Clarke, Lucy. The sea sisters. Charnwood, 2014.

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Clarke, Lucy. The sea sisters. Harper, 2013.

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Page, Jeremy. Sea change: A novel. Viking, 2010.

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Petersen, Bertha Ives. Eyes that see. Old Rugged Cross Press, 1993.

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Badiou, Alain. Being and event. Continuum, 2007.

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Badiou, Alain. Being and event. Continuum, 2006.

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Badiou, Alain. L' être et l'événement. Seuil, 1988.

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Sheldon, M. D. Lipshutz. 10 Things You Need to Know Before You See the Doctor. Silver Lake Publishing, 2009.

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Gottlieb, Eli. Now you see him. William Morrow, 2008.

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Gottlieb, Eli. Now You See Him. HarperCollins, 2008.

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Book chapters on the topic "SEP events"

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Reames, Donald V. "Impulsive SEP Events." In Solar Energetic Particles. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-50871-9_4.

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Reames, Donald V. "Gradual SEP Events." In Solar Energetic Particles. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-50871-9_5.

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Reames, Donald V. "Gradual SEP Events." In Solar Energetic Particles. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-66402-2_5.

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AbstractGradual solar energetic-particle (SEP) events are “big proton events” and are usually much more “gradual” in their decay than in their onset. As their intensities increase, particles streaming away from the shock amplify Alfvén waves that scatter subsequent particles, increasing their acceleration, eventually limiting ion flow at the “streaming limit.” Waves generated by higher-speed protons running ahead can also throttle the flow of lower-energy ions, flattening spectra and altering abundances in the biggest SEP events. Thus, we find that the A/Q-dependence of scattering causes eleme
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Reames, Donald V. "Impulsive SEP Events (and Flares)." In Solar Energetic Particles. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-66402-2_4.

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Abstract3He-rich, Fe-rich, and enriched in elements with Z > 50, the abundances of solar energetic particles (SEPs) from the small impulsive SEP events stand out as luminaries in our study. The 3He is enhanced by resonant wave-particle interactions. Element abundances increase 1000-fold as the ~3.6 power of the mass-to-charge ratio A/Q from He to heavy elements like Au or Pb, enhanced during acceleration in islands of magnetic reconnection in solar jets, and probably also in flares. This power-law of enhancement vs. A/Q implies Q determined by a source temperature of 2.5–3.2 MK, typical of
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Reames, Donald V. "A Turbulent History." In Solar Energetic Particles. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-66402-2_2.

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AbstractLarge solar energetic-particle (SEP) events are clearly associated in time with eruptive phenomena on the Sun, but how? When large SEP events were first observed, flares were the only visible candidate, and diffusion theory was stretched to explain how the particles could spread through space, as widely as observed. The observation of coronal mass ejections (CMEs), and the wide, fast shock waves they can drive, provided better candidates later. Then small events were found with 1000-fold enhancements in 3He/4He that required a different kind of source—should we reconsider flares, or th
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Reames, Donald V. "Distinguishing the Sources." In Solar Energetic Particles. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-66402-2_3.

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AbstractOur discussion of history has covered many of the observations that have led to the ideas of acceleration by shock waves or by magnetic reconnection in gradual and impulsive solar energetic particle (SEP) events, respectively. We now present other compelling observations, including onset timing, SEP-shock correlations, injection time profiles, high-energy spectral knees, e/p ratios, and intensity dropouts caused by a compact source, that have helped clarify these acceleration mechanisms and sources. However, some of the newest evidence now comes from source-plasma temperatures. In this
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Reames, Donald V. "Introducing the Sun and SEPs." In Solar Energetic Particles. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-66402-2_1.

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AbstractThe structure of the Sun, with its energy generation and heating, creates convection and differential rotation of the outer solar plasma. This convection and rotation of the ionized plasma generates the solar magnetic field. This field and its variation spawn all of the solar activity: solar active regions, flares, jets, and coronal mass ejections (CMEs). Solar activity provides the origin and environment for both the impulsive and gradual solar energetic particle (SEP) events. This chapter introduces the background environment and basic properties of SEP events, time durations, abunda
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Klein, Karl-Ludwig, Kostas Tziotziou, Pietro Zucca, et al. "X-Ray, Radio and SEP Observations of Relativistic Gamma-Ray Events." In Astrophysics and Space Science Library. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-60051-2_8.

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Reames, Donald V. "Summary and Conclusions." In Solar Energetic Particles. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-66402-2_10.

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AbstractIn this chapter we summarize our current understanding of SEPs, of properties of the sites of their origin and of the physical processes that accelerate or modify them. These processes can leave an indelible mark on the abundances of elements, isotopes, ionization states, anisotropies, energy spectra and time profiles of the SEPs. Transport of the ions to us along magnetic fields can impose new variations in large events or even enhance the visibility of the source parameters as the SEPs expand into the heliosphere. We lack physical models that can follow the complexity of SEP abundanc
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Al-Hamdani, Firas, and Doha Al-Feadh. "Estimation of the Transit Time of Multiple Coronal Mass Ejection Events." In Springer Proceedings in Physics. Springer Nature Singapore, 2025. https://doi.org/10.1007/978-981-96-3276-3_5.

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Abstract We study the transit time (T.T) of triple events where the first two coronal mass ejections (CME) are associated with solar energetic particle events (SEP), while the third one is not. Our study focuses on the propagation of these CMEs and their associated shocks to estimate the best acceleration equation for T.T calculations and to determine the minimum error of the T.T of the CMEs. Using different models, we estimated the T.T of very high-speed CMEs and compared them with the empirical shock arrival model (ESA). Our results show that the acceleration cessation distance (ACD) in the
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Conference papers on the topic "SEP events"

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Miyake, Fusa. "Cosmogenic Evidence for Past SEP Events." In 36th International Cosmic Ray Conference. Sissa Medialab, 2019. http://dx.doi.org/10.22323/1.358.0011.

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Cohen, Christina, J. G. Luhmann, R. A. Mewaldt, et al. "Searching for Extreme SEP Events with STEREO." In 35th International Cosmic Ray Conference. Sissa Medialab, 2017. http://dx.doi.org/10.22323/1.301.0134.

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Li, G., X. Ao, O. Verkhoglyadova, G. P. Zank, and L. Ding. "Diffusive shock acceleration in large SEP events." In PHYSICS OF THE HELIOSPHERE: A 10 YEAR RETROSPECTIVE: Proceedings of the 10th Annual International Astrophysics Conference. AIP, 2012. http://dx.doi.org/10.1063/1.4723606.

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Li, G., G. Zank, O. Verkhoglyadova, and L. Ding. "Diffusive shock acceleration and large SEP events." In SOLAR WIND 13: Proceedings of the Thirteenth International Solar Wind Conference. AIP, 2013. http://dx.doi.org/10.1063/1.4811000.

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Dalla, S. "Characterization of SEP events at high heliographic latitudes." In SOLAR WIND TEN: Proceedings of the Tenth International Solar Wind Conference. AIP, 2003. http://dx.doi.org/10.1063/1.1618680.

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Dalla, S. "Multi-spacecraft observations of decay phases of SEP events." In SOLAR WIND TEN: Proceedings of the Tenth International Solar Wind Conference. AIP, 2003. http://dx.doi.org/10.1063/1.1618681.

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Bućík, R., U. Mall, A. Korth, G. M. Mason, and R. Gómez-Herrero. "[sup 3]He-rich SEP events observed by STEREO-A." In SOLAR WIND 13: Proceedings of the Thirteenth International Solar Wind Conference. AIP, 2013. http://dx.doi.org/10.1063/1.4811007.

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Li, G., G. Zank, O. Verkhoglyadova, X. Ao, and L. Ding. "What controls the maximum particle energy in large SEP events." In SPACE WEATHER: THE SPACE RADIATION ENVIRONMENT: 11th Annual International Astrophysics Conference. AIP, 2012. http://dx.doi.org/10.1063/1.4768753.

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Didkovsky, Leonid, Darrell Judge, Seth Wieman, et al. "SEP Temporal Fluctuations Related to Extreme Solar Flare Events Detected by SOHO/CELIAS/SEM." In 45th AIAA Aerospace Sciences Meeting and Exhibit. American Institute of Aeronautics and Astronautics, 2007. http://dx.doi.org/10.2514/6.2007-496.

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Slocum, P. L. "Measurements of heavy elements in [sup 3]He-rich SEP events." In Acceleration and transport of energetic particles observed in the heliosphere (ACE-2000 symposium). AIP, 2000. http://dx.doi.org/10.1063/1.1324289.

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Reports on the topic "SEP events"

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Niemi, A. An Extension to Session Initiation Protocol (SIP) Events for Conditional Event Notification. Edited by D. Willis. RFC Editor, 2010. http://dx.doi.org/10.17487/rfc5839.

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Roach, A. B. SIP-Specific Event Notification. RFC Editor, 2012. http://dx.doi.org/10.17487/rfc6665.

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Jones, M., W. Denniss, and M. Ansari. Security Event Token (SET). Edited by P. Hunt. RFC Editor, 2018. http://dx.doi.org/10.17487/rfc8417.

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Ackerley, N., A. L. Bird, M. Kolaj, H. Kao, and M. Lamontagne. Procedures for seismic event type discrimination at the Canadian Hazards Information Service. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/329613.

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Within a catalogue of seismic events, it is necessary to distinguish natural tectonic earthquakes from seismic events due to human activity or other natural processes. This becomes very important when the data are incorporated into models of seismic hazard, since natural and anthropogenic events follow different recurrence and scaling laws. This document outlines a two-step procedure whereby first, a most likely event type is identified, and second, confirmation or refutation is sought. The procedure is intended to be compatible with current and past practices at the Canadian Hazards Informati
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B., A. Session Initiation Protocol (SIP)-Specific Event Notification. RFC Editor, 2002. http://dx.doi.org/10.17487/rfc3265.

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Polk, J. Extending the Session Initiation Protocol (SIP) Reason Header for Preemption Events. RFC Editor, 2006. http://dx.doi.org/10.17487/rfc4411.

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Blais-Stevens, A. Historical landslide events along the Sea to Sky corridor, British Columbia. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2007. http://dx.doi.org/10.4095/224585.

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Edwards, Frannie, Kaikai Liu, Amanda Lee Hughes, et al. Best Practices in Disaster Public Communications: Evacuation Alerting and Social Media. Mineta Transportation Institute, 2022. http://dx.doi.org/10.31979/mti.2022.2254.

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This research project examines the current state of the practice for disaster public communication, the distrust of government, the training available to public information officers, and the literature available to guide the design of effective public outreach messaging, especially for rapid on-set events. Growing distrust in government had led to lack of public confidence in public agency messaging during emergencies, yet public agency public information officers are using multiple pathways, including both traditional and social media resources, to try to reach impacted communities effectivel
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Rosenberg, J. A Session Initiation Protocol (SIP) Event Package for Registrations. RFC Editor, 2004. http://dx.doi.org/10.17487/rfc3680.

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Niemi, A., ed. Session Initiation Protocol (SIP) Extension for Event State Publication. RFC Editor, 2004. http://dx.doi.org/10.17487/rfc3903.

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