Relevant bibliographies by topics / Helional

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Academic literature on the topic 'Helional'

Author: Grafiati
Published: 4 June 2021
Last updated: 20 February 2023

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Journal articles on the topic "Helional"

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Chiruta, Victor, and Robert Renshaw. "Does the ‘Two Dogs’ Method of Clandestine Synthesis Use Precursors that are not Legally Regulated on the Australian East Coast?" International Journal of Law and Politics Studies 3, no. 2 (November 28, 2021): 26–28. http://dx.doi.org/10.32996/ijlps.2021.3.2.4.

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In the State of New South Wales (NSW), Australia, the prosecution in criminal proceedings is seeking deterrence punishment for offenders manufacturing 3,4-methylenedioxyamphetamine (MDA) from the precursor helional via the ‘Two Dogs’ method (TDM). The reason given by the prosecution is a presumption that the TDM does not use any unrestricted chemicals in the synthesis of MDA. A comprehensive literature search was conducted. The relevant law was searched to fact-check the assertion of the prosecution. It was found that the prosecution was incorrect. Intermediate precursors of the TDM are restricted in NSW. However, the starting precursor helional remains unscheduled in NSW, yet helional is scheduled in some other Australian States. The prosecution’s position may play a significant factor in the sentencing proceedings of offenders. Therefore, as a matter of urgency, the prosecution must review and update its position and its submissions, keeping with the factual position in relation to the legal provisions of precursors used in the TDM.
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Kalbe, Benjamin, Marian Schlimm, Julia Mohrhardt, Paul Scholz, Fabian Jansen, Hanns Hatt, and Sabrina Osterloh. "Helional induces Ca2+ decrease and serotonin secretion of QGP-1 cells via a PKG-mediated pathway." Journal of Molecular Endocrinology 57, no. 3 (October 2016): 201–10. http://dx.doi.org/10.1530/jme-16-0063.

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The secretion, motility and transport by intestinal tissues are regulated among others by specialized neuroendocrine cells, the so-called enterochromaffin (EC) cells. These cells detect different luminal stimuli, such as mechanical stimuli, fatty acids, glucose and distinct chemosensory substances. The EC cells react to the changes in their environment through the release of transmitter molecules, most importantly serotonin, to mediate the corresponding physiological response. However, little is known about the molecular targets of the chemical stimuli delivered from consumed food, spices and cosmetics within EC cells. In this study, we evaluated the expression of the olfactory receptor (OR) 2J3 in the human pancreatic EC cell line QGP-1 at the mRNA and protein levels. Using ratiofluorometric Ca2+ imaging experiments, we demonstrated that the OR2J3-specific agonist helional induces a transient dose-dependent decrease in the intracellular Ca2+ levels. This Ca2+ decrease is mediated by protein kinase G (PKG) on the basis that the specific pharmacological inhibition of PKG with Rp-8-pCPT-cGMPS abolished the helional-induced Ca2+ response. Furthermore, stimulation of QGP-1 cells with helional caused a dose-dependent release of serotonin that was comparable with the release induced by the application of a direct PKG activator (8-bromo-cGMP). Taken together, our results demonstrate that luminal odorants can be detected by specific ORs in QGP-1 cells and thus cause the directed release of serotonin and a PKG-dependent decrease in intracellular Ca2+.
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Cormick, Justin, James F. Carter, Timothy Currie, Carney Matheson, and Sarah L. Cresswell. "Isotope fractionation during the synthesis of MDMA.HCl from helional." Forensic Chemistry 28 (May 2022): 100406. http://dx.doi.org/10.1016/j.forc.2022.100406.

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Stueckler, Clemens, Nicole J. Mueller, Christoph K. Winkler, Silvia M. Glueck, Karl Gruber, Georg Steinkellner, and Kurt Faber. "Bioreduction of α-methylcinnamaldehyde derivatives: chemo-enzymatic asymmetric synthesis of Lilial™ and Helional™." Dalton Transactions 39, no. 36 (2010): 8472. http://dx.doi.org/10.1039/c002971h.

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Nicastro, Gloria, Louise Mary Black, Paolo Ravarino, Simone d’Agostino, Davide Faccio, Claudia Tomasini, and Demetra Giuri. "Controlled Hydrolysis of Odorants Schiff Bases in Low-Molecular-Weight Gels." International Journal of Molecular Sciences 23, no. 6 (March 13, 2022): 3105. http://dx.doi.org/10.3390/ijms23063105.

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Imines or Schiff bases (SB) are formed by the condensation of an aldehyde or a ketone with a primary amine, with the removal of a water molecule. Schiff bases are central molecules in several biological processes for their ability to form and cleave by small variation of the medium. We report here the controlled hydrolysis of four SBs that may be applied in the fragrance industry, as they are profragrances all containing odorant molecules: methyl anthranilate as primary amine, and four aldehydes (cyclamal, helional, hydroxycitronellal and triplal) that are very volatile odorants. The SB stability was assessed over time by HPLC-MS in neutral or acidic conditions, both in solution and when trapped in low molecular weight gels. Our results demonstrate that it is possible to control the hydrolysis of the Schiff bases in the gel environment, thus tuning the quantity of aldehyde released and the persistency of the fragrance.
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Cometto-Muñiz, J. Enrique, and Michael H. Abraham. "Odor Detection by Humans of Lineal Aliphatic Aldehydes and Helional as Gauged by Dose–Response Functions." Chemical Senses 35, no. 4 (February 26, 2010): 289–99. http://dx.doi.org/10.1093/chemse/bjq018.

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Kalbe, Benjamin, Viola Maria Schulz, Marian Schlimm, Stathis Philippou, Nikolina Jovancevic, Fabian Jansen, Paul Scholz, et al. "Helional-induced activation of human olfactory receptor 2J3 promotes apoptosis and inhibits proliferation in a non-small-cell lung cancer cell line." European Journal of Cell Biology 96, no. 1 (January 2017): 34–46. http://dx.doi.org/10.1016/j.ejcb.2016.11.004.

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Nishimura, Yasumitsu, Kenta Nomiyama, Shuichiro Okamoto, Mika Igarashi, Yusuke Yorifuji, Yukino Sato, Ayasa Kamezaki, Aya Morihara, Futoshi Kuribayashi, and Akira Yamauchi. "Identification of anti-SARS-CoV-2 agents based on flavor/fragrance compositions that inhibit the interaction between the virus receptor binding domain and human angiotensin converting enzyme 2." PLOS ONE 17, no. 12 (December 19, 2022): e0279182. http://dx.doi.org/10.1371/journal.pone.0279182.

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Coronavirus disease 2019 (COVID-19) pandemic poses a threat to human beings and numerous cases of infection as well as millions of victims have been reported. The binding of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) spike protein receptor binding domain (RBD) to human angiotensin converting enzyme 2 (hACE2) is known to promote the engulfment of the virus by host cells. Employment of flavor/fragrance compositions to prevent SARS-CoV-2 infection by inhibiting the binding of viral RBD (vRBD) to hACE2 might serve as a favorable, simple, and easy method for inexpensively preventing COVID-19, as flavor/fragrance compositions are known to directly interact with the mucosa in the respiratory and digestive systems and have a long history of use and safety assessment. Herein we report the results of screening of flavor/fragrance compositions that inhibit the binding of vRBD to hACE2. We found that the inhibitory effect was observed with not only the conventional vRBD, but also variant vRBDs, such as L452R, E484K, and N501Y single-residue variants, and the K417N+E484K+N501Y triple-residue variant. Most of the examined flavor/fragrance compositions are not known to have anti-viral effects. Cinnamyl alcohol and Helional inhibited the binding of vRBD to VeroE6 cells, a monkey kidney cell line expressing ACE2. We termed the composition with inhibitory effect on vRBD-hACE2 binding as “the molecularly targeted flavor/fragrance compositions”. COVID-19 development could be prevented by using these compositions with reasonable administration methods such as inhalation, oral administration, and epidermal application.
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Talman, Richard M. "Difference of measured proton and He3 EDMs: a reduced systematics test of T-reversal invariance." Journal of Instrumentation 17, no. 11 (November 1, 2022): P11039. http://dx.doi.org/10.1088/1748-0221/17/11/p11039.

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Abstract The upper limit on (time reversal symmetry T-violating) permanent hadron electric dipole moments (EDMs) is the PSI neutron EDM value; dn = (0.0 ± 1.1stat ± 0.2sys × 10-26) e cm. This paper describes an experiment to be performed at a BNL-proposed CLIP project which is to be capable of producing intense polarized beams of protons, p, helions (He3 nuclei), h, and other isotopes. The EDM prototype ring PTR (proposed at COSY Lab, Juelich) is expected to measure individual particle EDMs (for example EDM_p for the proton) using simultaneous counter-rotating polarized proton beams, with statistical error ±10-30e.cm after one year running time, four orders of magnitude less than the PSI neutron EDM upper limit, and with comparable systematic error. A composite particle, the helion faces T-symmetry constraints more challenging than the proton. Any measurably large value of Δ= EDM h - EDM p , the difference of helion and proton EDMs, would represent BSM physics. The plan is to replicate PTR at BNL. The dominant systematic error would be canceled two ways, both made possible by phase-locking “doubly-magic” 38.6 MeV proton and 39.2 MeV helion spin tunes. This stabilizes their MDM-induced in-plane precessions, without affecting their EDM-induced out-of-plane precessions. The dominant systematic error would therefore cancel in the meaurement of Δ in a fixed field configuration. Another systematic error cancellation will come from averaging runs for which both magnetic field and beam circulation directions are reversed. Precise magnetic field reversal is made possible by the reproducible absolute frequency phase-locking over long runs to eliminate the need for (impractically precise) magnetic field measurement. Risk of EDM measurement failure is discussed in a final appendix.
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Pogorelov, N. V., S. N. Borovikov, J. Heerikhuisen, and M. Zhang. "THE HELIOTAIL." Astrophysical Journal 812, no. 1 (October 6, 2015): L6. http://dx.doi.org/10.1088/2041-8205/812/1/l6.

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Dissertations / Theses on the topic "Helional"

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Cormick, Justin. "Isotope ratio analysis of 3,4-methylenedioxyamphetamine (MDA) and 3,4-methylenedioxymethylamphetamine (MDMA) synthesised from helional." Thesis, Griffith University, 2022. http://hdl.handle.net/10072/415810.

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Illicit drug profiling describes the applications of chemical or physical drug profiles to areas such as law enforcement and legislation. Stable isotope analysis by stable isotope ratio mass spectrometry (IRMS) has become a useful tool for illicit drug profiling purposes. The following research was focused on the illicit drug profiling of 3,4-methylenedioxyamphetamine (MDA) and 3,4-methylenedioxmethylamphetamine (MDMA) by IRMS. Following an extensive literature review, it was surmised that the illicit drug profiling of MDMA (and a lesser extent MDA) by IRMS was complicated. Previous research suggested that stable isotopic compositions of MDA/MDMA may not be characteristic of the synthetic history. Traditional precursors for these drugs have similar, plant-based origins and similar isotopic compositions. The changes to isotopic compositions during the synthesis of MDA/MDMA made it difficult to establish links back to specific precursors. The control of traditional precursors has seen illicit manufacturing utilise alternative compounds. Helional has emerged as a novel precursor for MDA and MDMA, and although recently legislated against in Queensland, Australia, remains largely uncontrolled in many other jurisdictions. The aim of this research was to investigate further the analysis of MDA and MDMA by IRMS, with particular focus on the alternative precursor helional. This was performed with the following individual aims: 1. To investigate the δ2H, δ13C and δ18O composition variation in traditional and alternative MDA/MDMA precursors available in Queensland, Australia including the novel precursor helional. 2. To investigate the δ13C and δ15N composition variation in nitrogen sources used for the synthesis of MDA and MDMA. 3. To investigate the synthesis of MDA and MDMA from helional, and characterisation to determine what, if any isotopic changes occur during each stage of synthesis. 4. To investigate the HCl salt precipitation of MDA and MDMA and to determine what, if any isotopic changes occur during this process. A survey of traditional and alternative precursors and pre-precursors, from which MDA/MDMA can be produced, found a greater variation in stable isotope ratios than previously reported. Of particular interest were samples found with δ13C values more negative than traditional precursors, including helional (between –32.47 and –32.21‰) and 3,4-methylenedioxyphenyl-2-propanone (MDP2P) prepared from the methyl-glycidate masking group (methyl-3-[3,4- (methylenedioxy)phenyl]-2-methyl-glycidate (MMDMG)) (–31.39‰). A survey of ATS nitrogen sources by IRMS was also conducted. Much greater variation was found in the δ15N compositions for the alternative nitrogen sources nitromethane (–37.21 to – 0.10‰) and hydroxylamine (–97.87 to +2.19‰). Hydroxylamine is utilised in the production of MDA from helional, and can itself be produced from nitromethane. Changes to stable isotope ratios from precursors and nitrogen sources to MDA and MDMA, and during the HCl salt precipitation, were next investigated. One pathway from helional to MDP2P was investigated via an enamine intermediate, and from MDP2P to MDMA by reductive amination. From helional to MDA two methods were investigated, both proceeding through an amide intermediate. Minimal change was observed in δ13C composition from helional to MDA and MDMA, however, isotopic changes occurred in δ2H, δ15N and δ18O compositions. During the HCl salt precipitation minimal change was seen in δ13C and δ18O composition. When multiple precipitations of the HCl salt were collected, changes occurred to δ2H and δ15N values. If high yields of MDA/MDMA were collected as the HCl salt and homogenised, this isotopic fractionation is expected to be reduced. These results have implications to the illicit drug profiling of MDA and MDMA by IRMS. With minimal changes to δ13C composition, this element may provide limited information about the synthetic history of a sample, especially when MDA or MDMA was prepared from alternative precursors with more negative δ13C values. Changes observed in δ2H, δ15N and δ18O values suggest that these elements may be more useful in characterising batch-to-batch variations between MDA or MDMA samples.
Thesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Environment and Sc
Science, Environment, Engineering and Technology
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Marrakchi, Mouna. "Développement et optimisation de biocapteurs à base de biomolécules et de micro-organismes sur microélectrodes interdigitées." Ecully, Ecole centrale de Lyon, 2006. http://bibli.ec-lyon.fr/exl-doc/mmarrakchi.pdf.

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De nos jours, les besoins en biocapteurs dans différents domaines (environnement, médical. . . ) sont réels. Et c'est pour répondre à certains de ces besoins que dans ce travail nous nous sommes intéressés au développement de différents biocapteurs se basant sur l'immobilisation d'enzymes et/ou de micro-organismes sur des électrodes conductimètriques. La première partie de ce travail a été consacrée au developpement d'un biocapteur enzymatique à base de proteinase K pour le contrôle de la pollution organique dans les eaux naturelles à travers le dosage des protéines. Dans la partie suivante, nous nous sommes intéressés au développement d'un biocapteur associant deux activités enzymatiques : la β-galactosidase et la glucose oxydase et son application au dosage du lactose dans le lait. La réussite du suivi de la catalyse du lactose par la combinaison de son hydrolyse enzymatique par la β-galactosidase avec l'oxydation, du glucose généré (catalysée par la glucose oxydase), à l'aide des électrodes conductimétriques, ont ensuite été appliqués au dosage du sélénite (élément toxique à forte dose). Ceci a été réalisé en exploitant la β-gal induite dans les cellules bactériennes de Herminiimonas arsenicoxydans par la présence de sélénite. Ainsi, un biocapteur conductimétrique original associant la glucose oxydase à une bactérie génétiquement modifée, qui exprime l'activite β-galactosidase en présence de sélénite, a été développé pour la détermination du sélénite. Enfn, un biocapteur olfactif se basant sur l'immobilisation de levures S. Cerevisiae génétiquement modifées, exprimant le récepteur olfactif humain OR17-40 a été développé et appliqué avec succès à la détection de l'hélional
Nowadays, the needs in biosensors has proven to be real and relevant in several fields such as the environment, health,. . . To meet those needs and expectations, we focused in this thesis on the design of different biosensors based on enzyme and/or micro-organisms immobilized on conductometric electrodes. The first part of this study is dedicated to the use of proteinase K based biosensor to estimate and control organic pollution in river's waters through protein titration. The next part describes the development of a biosensor mixing two distinct enzymatic activities, the beta-galactosidase and the glucose oxidase, and its application to lactose determination in milk. The efficiency of the conductometric biosensor in lactose analysis, as a result of combination of lactose enzymatic hydrolysis (though beta-galactosidase) and glucose oxidation(catalyzed by glucose oxidase), were afterwards applied to selenite determination (toxic element if used in important quantities). This was realized by using Herminiimonas arsenicoxydans bacterial cells where the beta-galactosidase activity is induced by selenite. Thus, an original conductometric biosensor has been developed, based on the combination of glucose oxidase activity and genetically modified bacteria, which produced abeta-galactosidase activity in presence of selenite. Finally, an olfactory biosensor based on the immobilization of a genetically modified Saccharomyces Cerevisiæ yeast, expressing the human olfactory receptor OR17-40, has been successfully developed and applied to helional detection
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Bezuidenhout, Jacques. "Pre-equilibrium helion emission induced by protons." Thesis, Link to the online version, 2006. http://hdl.handle.net/10019.1/1307.

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Hoas, Karin. "Att bygga staden i fyra dimensioner: personliga reflektioner om arkitektens roll som stadsbyggare samt exemplet Heliodal i Rönninge." Thesis, KTH, Arkitektur, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-170110.

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Examensarbetet består av två fristående delar. Textdelen ”Att bygga staden i fyra dimensioner: några personliga reflektioner om arkitektens roll som stadsbyggare” tar upp samhällsbyggande och stadsbyggande mot bakgrund av begreppet samhälle i dess sociala respektive fysiska innebörd, arkitektuppgiften i det offentliga rummet respektive den fysiska miljön som system, samt några olika aspekter på tidsdimensionen i stadsbyggandet: tidskrävande, långvarigt resultat, kontinuerlig process, föränderliga premisser, påverkan på vardagstiden och stadsrummens skiftande med tiden. ”Heliodal i Rönninge: fakta och inspiration för dig som vill bygga villa” är en beskrivning av villaområdet Heliodal, dess karaktärsdrag och historia och förslag på hur de kan tillvaratas. Den är utformad som ett förslag till broschyr, riktad till privatpersoner som överväger att köpa tomt och bygga villa i området och baseras på en verklig detaljplan för ett omvandlingsområde i Salems kommun. Erfarenhetesmässigt kommer tillkommande bebyggelse sannolikt att mestadels bestå av kataloghus. I broschyren beskrivs områdets läge och historia, landskapets och den befintliga bebyggelsemiljöns karaktärsdrag, grunddragen i detaljplanen och konkreta förslag på hur den enskilda byggherren kan tänka vid val av hus och tomt för att få bebyggelsen och tomtens utformning att smälta in i området. Tyngdpunkten ligger på anpassning till befintlig terräng.
The thesis consists of two separate parts. The text ”Building the Town in Four Dimensions: Personal Reflections on the Architect's Role as an Urban Planner” discusses urban planning from a ”community” and a ”municipality” piont of view, the architect´s tasks of public space and of the town as a system, and some aspects of time as the fourth dimension: urban planning takes time, has long-lasting effects, is a continuous process, the premises keep changing, it affects people´s everyday life and the public space changes over the day and the year. ”Heliodal in Rönninge: Facts and Inspiration for Your Own New House” describes the area of Heliodal, its characteristics and history, and some ideas how this can be taken care of when adding new houses. This part of the thesis is presented as a brochure meant for families who consider buying some property and having their own house constructed. It is based on a real town plan for an area in the municipality of Salem, south of Stockholm. In areas like this most of the new houses are likely to be prefabricated houses of different kinds. The brochure shows the place and its history, the main features of the landscape and the existing buildings, the basic ideas of the town plan and some suggestions how to choose house and plan the garden to make them fit into the environment, emphasizing adaption to the natural topography.
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Qu, Zhipeng. "La nouvelle méthode Heliosat-4 pour l’évaluation du rayonnement solaire au sol." Thesis, Paris, ENMP, 2013. http://www.theses.fr/2013ENMP0040/document.

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Plusieurs méthodes existent pour évaluer de manière opérationnelle l'éclairement solaire au sol à partir d'images acquises par satellite. Durant sa thèse soutenue en 2009 à MINES ParisTech, Oumbe a conçu une nouvelle méthode, Heliosat-4, faisant appel à des modèles numériques du transfert radiatif et à des approximations d'exécution rapide. La présente thèse vise à consolider ces résultats et à effectuer la validation complète de la méthode Heliosat-4. Elle s'inscrit dans une collaboration scientifique internationale dans les projets européens MACC (Monitoring Atmosphere Composition and Climate) et MACC-II.Oumbe a proposé une approximation de l'équation de transfert radiatif s'écrivant alors comme un produit de l'éclairement par ciel clair par un terme d'extinction dû aux nuages. Nous avons établi que les erreurs liées à cette approximation sont très faibles dans les conditions usuelles et qu'elle peut donc être utilisée dans Heliosat-4, ce qui en facilitera l'implémentation informatique ainsi que son fonctionnement opérationnelle.La méthode Heliosat-4 est donc ainsi composé de deux modèles composés d'abaques : McClear pour l'éclairement par ciel clair et McCloud pour l'extinction cet éclairement due aux nuages. A l'aide de mesures in-situ d'éclairements direct et diffus de référence, nous avons analysé finement les performances de Heliosat-4 selon différentes conditions. La qualité de la première version pré-opérationnelle de Heliosat-4 est jugée satisfaisante car elle permet des estimations d'éclairement global avec une précision de l'ordre de celles des méthodes existantes mais des estimations des composantes directe et diffuse sensiblement de meilleure qualité
Several methods have been developed to assess operationally the surface solar irradiance from satellite images. During his PhD thesis presented in 2009 at MINES ParisTech, Oumbe has designed a new method using numerical radiative transfer model and fast approximations. The present PhD thesis aimed at consolidating these results and validating Heliosat-4. This work is the international scientific collaboration framework of the European-funded projects MACC (Monitoring Atmosphere Composition and Climate) and MACC-II.As a foundation of Heliosat-4, Oumbe has proposed an approximation of the radiative transfer equation by a product of clear-sky irradiance and a term describing the cloud extinction. We have established that estimation errors due to this approximation are very small in usual conditions and that this approximation may be adopted. It allows a convenient modular development of Heliosat-4 and eases its future operational use.The Heliosat-4 method is then composed of two abacus-based models: McClear for the irradiance under clear-sky and McCloud for the irradiance extinction due to clouds. With in-situ reference measurements of direct and diffuse irradiance, we have carried out deep performance analysis of Heliosat-4, under different conditions. The quality of this first preoperational version of Heliosat-4 is judged satisfactory as it enables estimations of global irradiance with the same level of quality of other existing methods in literature but also estimations of direct and diffuse irradiances with a noticeable better quality
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Qu, Zhipeng. "La nouvelle méthode Heliosat-4 pour l'évaluation du rayonnement solaire au sol." Phd thesis, Ecole Nationale Supérieure des Mines de Paris, 2013. http://pastel.archives-ouvertes.fr/pastel-00957358.

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Plusieurs méthodes existent pour évaluer de manière opérationnelle l'éclairement solaire au sol à partir d'images acquises par satellite. Durant sa thèse soutenue en 2009 à MINES ParisTech, Oumbe a conçu une nouvelle méthode, Heliosat-4, faisant appel à des modèles numériques du transfert radiatif et à des approximations d'exécution rapide. La présente thèse vise à consolider ces résultats et à effectuer la validation complète de la méthode Heliosat-4. Elle s'inscrit dans une collaboration scientifique internationale dans les projets européens MACC (Monitoring Atmosphere Composition and Climate) et MACC-II.Oumbe a proposé une approximation de l'équation de transfert radiatif s'écrivant alors comme un produit de l'éclairement par ciel clair par un terme d'extinction dû aux nuages. Nous avons établi que les erreurs liées à cette approximation sont très faibles dans les conditions usuelles et qu'elle peut donc être utilisée dans Heliosat-4, ce qui en facilitera l'implémentation informatique ainsi que son fonctionnement opérationnelle.La méthode Heliosat-4 est donc ainsi composé de deux modèles composés d'abaques : McClear pour l'éclairement par ciel clair et McCloud pour l'extinction cet éclairement due aux nuages. A l'aide de mesures in-situ d'éclairements direct et diffus de référence, nous avons analysé finement les performances de Heliosat-4 selon différentes conditions. La qualité de la première version pré-opérationnelle de Heliosat-4 est jugée satisfaisante car elle permet des estimations d'éclairement global avec une précision de l'ordre de celles des méthodes existantes mais des estimations des composantes directe et diffuse sensiblement de meilleure qualité.
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Tournadre, Benoît. "Heliosat-V ˸ une méthode polyvalente d’estimation du rayonnement solaire au sol par satellite." Thesis, Université Paris sciences et lettres, 2020. http://www.theses.fr/2020UPSLM063.

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L'éclairement du Soleil à la surface de la Terre est reconnu comme une variable climatique essentielle par l'Organisation Météorologique Mondiale. Sa connaissance est aussi précieuse pour les sciences du climat que pour le développement d'énergies alternatives aux combustibles fossiles, comme le solaire photovoltaïque. La mesure au sol de ce rayonnement est très clairsemée sur la Terre, d'où l'intérêt de méthodes d'estimation basées sur la télédétection par satellite. Combiner les estimations produites à partir de différents satellites en orbite est une voie pour couvrir au mieux l'information sur tout le globe terrestre. De plus, différentes générations de satellites ont produit une imagerie de la Terre depuis plusieurs décennies, permettant d'estimer de longues séries temporelles du rayonnement solaire, voire d'identifier des variations long terme, un objectif récurrent dans l'étude du changement climatique. Depuis plus de trente ans, les méthodes Heliosat permettent cette estimation, mais elles ont été conçues pour être appliquées à un capteur spécifique en orbite géostationnaire et ont des contraintes limitant leurs champs d'application : la nécessité d'utiliser une longue série temporelle passée (Heliosat, Heliosat-2), ou le besoin de mesures multispectrales (Heliosat-4). Ce travail sur le développement d'une méthode Heliosat-V apporte des éléments de polyvalence à l'estimation satellite par les méthodes dites à "indice d'ennuagement", dans l'objectif de tendre vers une donnée homogène du rayonnement solaire issue de mesures de différents instruments satellites. Deux problèmes sont en particulier considérés pour parvenir à cette estimation : la diversité des capteurs en termes de sensibilités spectrales, et l'influence des géométries de visée et d'éclairement solaire sur les mesures satellites. La méthode s'appuie extensivement sur la modélisation du transfert radiatif dans l'atmosphère dans la gamme spectrale 400-1000 nm pour simuler d'une part les mesures de radiomètres satellites en conditions de ciel clair et d'autre part celles en présence d'un nuage optiquement épais. La méthode est testée sur l'imagerie d'un instrument satellite géostationnaire, Meteosat-9/SEVIRI, et de manière plus exploratoire sur celle d'un non géostationnaire, DSCOVR/EPIC. Les résultats sont comparés à des mesures de référence au sol de l'éclairement, et montrent des performances similaires à celles de produits opérationnels d'éclairement solaire. La qualité des estimations dépend cependant du canal spectral utilisé, en particulier de la présence de diffusion ou d'absorption de l'atmosphère claire dans le signal mesuré par satellite. L'accent est aussi mis sur le besoin d'un étalonnage absolu précis des mesures radiométriques satellites pour produire des séries temporelles d'éclairement de surface avec des biais et une dérive temporelle les plus faibles possibles
Solar irradiance at the surface of the Earth is recognized as an essential climate variable by the World Meteorological Organization. Its knowledge is as much important for climate sciences as for the development of energy alternatives to fossil fuels, like solar photovoltaic. Ground measurements of this radiation are very sparse on Earth, explaining the interest for satellite-based remote sensing to estimate it. Combining estimations from different satellites in orbit is a pathway to cover the information on the whole globe. Different generations of satellites also produced a multidecadal imagery of the Earth, making it conceivable to estimate long time series of solar radiation, or even to identify long-term variations, a recurrent objective in the study of climate change. For more than 30 years, Heliosat methods estimate surface solar irradiance from satellite imagery, but they have been designed to be applied to a specific sensor on a geostationary orbit, and have limitations in their scope : the need for a long archive of satellite imagery (Heliosat, Heliosat-2), or else the need for multispectral measurements (Heliosat-4). This work dedicated to the development of a Heliosat-V method brings elements of versatility to the satellite-based estimation from so-called "cloud-index" methods, with the ultimate goal to reach homogeneous data of solar radiation derived from measurements made by different satellite instruments. Two issues are in particular considered here to reach such an estimation: the diversity of sensors in terms of spectral sensitivities, and the influence of viewing and solar geometries on spaceborne measurements. The method extensively deals with radiative transfer modeling in the spectral range 400-1000 nm to simulate on one hand satellite measurements in clear-sky conditions, and on the other hand satellite measurements in the presence of an optically thick cloud. The method is tested on the imagery of a geostationary satellite instrument, Meteosat-9/SEVIRI, and in a more exploratory way, on the non geostationary sensor DSCOVR/EPIC. Results are compared to high quality ground-based measurements of irradiance, and show performances similar to operational satellite products. However, the quality of estimates depends on the spectral channel used, and especially of the presence of clear-sky atmospheric scattering or absorption in the signal measured by the satellite instrument. The accent is also put on the need for an accurate absolute calibration of satellite radiometric measurements in order to produce time series of surface solar irradiance with the smallest biases and temporal drift possible
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Gleim, Andrea. "Retentionsraten und klinische Verarbeitungseigenschaften der Fissurenversiegler Helioseal-F und Fissurit-F im Vergleich eine prospektive Doppelblindstudie /." Giessen : VVB Laufersweiler, 2006. http://deposit.d-nb.de/cgi-bin/dokserv?idn=981577229.

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Albarelo, Tommy. "Estimation de l'Irradiation Solaire sur le Plateau des Guyanes : apport de la Télédétection Satellite." Thesis, Guyane, 2016. http://www.theses.fr/2016YANE0008/document.

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La connaissance du rayonnement solaire, ou irradiation solaire, à la surface de la Terre est d’un grand intérêt dans de nombreux domaines. Cependant le développement de systèmes utilisant l’énergie solaire nécessitent des données sur le rayonnement solaire denses (spatialement et temporellement) et suffisamment précises pour simuler, concevoir, gérer et optimiser le fonctionnement de ces systèmes. L’objectif principal de cette thèse est de concevoir et développer une méthode d'estimation de l'irradiation solaire applicable à la zone intertropicale. Les travaux de la première partie se concentrent sur la recherche d’une solution méthodologique pour estimer le l’irradiation solaire sur la partie Nord du continent Sud-Américain (Plateau des Guyanes) avec une haute résolution spatiale et temporelle et une précision similaire à celle des aux autres méthodes opérationnelles sous d’autres climats. Dans la deuxième partie, nous proposons d’améliorer les estimations d’irradiation solaire obtenues dans la première partie, notamment celles faites en ciel couvert. Le Plateau des Guyanes étant une zone fortement affectée par la ZIC et avec des passages nuageux très fréquents, il nous est apparu nécessaire de compléter les modifications apportées à la méthode originelle en introduisant une modélisation du ciel couvert. Dans la troisième partie, nous proposons de réaliser des cartographies d’indicateurs en utilisant les estimations d’irradiation obtenues avec la méthode Heliosat-2 modifiée. Enfin, nous concluons sur les avancées obtenues en termes de connaissance sur l’irradiation solaire et sur son exploitabilité sur le Plateau des Guyanes
Knowledge of solar radiation, or solar irradiation, at Earth’s surface is of great interest in many fields. However, the development of systems using solar energy need spatially and temporally dense data on solar radiation, sufficiently accurate to simulate, design, generate and optimize the operation of these systems.The main objective of this thesis is to design and develop a method to assess solar irradiation applicable on intertropical regions. The works of the first part focus on the search of a methodological solution to assess solar irradiation on the northern part of the South American continent (Guiana Shield) with a high temporal and spatial resolution and accuracy on the same level of other operational methods under other climates. In the second part, we propose to improve the solar irradiation assessments obtained in the first part, notably those done in cloudy sky. The Guiana Shield being a zone strongly affected by the ITCZ and with recurrent cloudy periods, it appeared necessary to us to complete the changes brought to the original method by introducing a modeling of the cloudy sky. In the third part, we propose to produce maps of indicators by using the assessments of solar irradiation obtained with the modified Heliosat-2 method. Finally, we conclude on the advances obtained in terms of knowledge on solar irradiation and its exploitability on the Guiana Shield
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Gleim, Andrea [Verfasser]. "Retentionsraten und klinische Verarbeitungseigenschaften der Fissurenversiegler Helioseal-F und Fissurit-F im Vergleich : eine prospektive Doppelblindstudie / vorgelegt von Andrea Gleim." Wettenberg : VVB Laufersweiler, 2006. http://d-nb.info/981577229/34.

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Books on the topic "Helional"

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Aerni, Fritz. Suggestion, Hypnose und Helioda: Die Entdeckung und die experimentelle Darstellung der Elementar- und Helioda-Strahlen durch Carl Huter. Zürich: Carl-Huter-Verlag, 2010.

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Ottinger, Didier. Jean Helion. Paul Holberton Publishing, 2005.

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Mann, George. Helion Rain. Black Library, 2011.

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Mason, AJ. The Helion Band. Butterworth Books, 2022.

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Helion, Jean. Helion: La figure tombee. Adam Biro, 1995.

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Helion The Fiery Foe. Orchard, 2010.

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Helion, Jean. Jean Helion 1904-1987. Tibor de Nagy Gallery, 2005.

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March, Olivia. Helion: Embrace of the Keepers Book One. Whiskey Creek Press, LLC, 2018.

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Services, N. D. Author. Helionaut Grid Notebook: 150 page Grid Notebook Journal Diary (Science Fiction 150 Grid) (Volume 20). CreateSpace Independent Publishing Platform, 2016.

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Bevis, Mark. IN FASCISM'S SHADOW: (1): Armies of Northern Europe 1939-40 (Helion Order of Battle). Helion and Co, 2007.

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Book chapters on the topic "Helional"

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McComas, David J. "Heliotail." In Magnetotails in the Solar System, 189–95. Hoboken, NJ: John Wiley & Sons, Inc, 2015. http://dx.doi.org/10.1002/9781118842324.ch11.

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"(967) Helionape [2.22, 0.17, 5.4]." In Dictionary of Minor Planet Names, 16. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/978-3-540-34361-5_15.

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Nickeler, Dieter, and Hans Fahr. "Stationary MHD–equilibria of the heliotail flow." In The Outer Heliosphere: The Next Frontiers, Proceedings of the COSPAR Colloquium, 57–60. Elsevier, 2001. http://dx.doi.org/10.1016/s0964-2749(01)80011-1.

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Conference papers on the topic "Helional"

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Tanaka, M. "Highlights from HELION97." In The seventh international workshop on polarized gas targets and polarized beams. AIP, 1998. http://dx.doi.org/10.1063/1.54983.

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Wood, Brian E., Vladislav V. Izmodenov, Jakobus le Roux, Gary P. Zank, Andrew J. Coates, and Vladimir Florinski. "Lyman-α Absorption from Heliotail ENAs." In PICKUP IONS THROUGHOUT THE HELIOSPHERE AND BEYOND: Proceedings of the 9th Annual International Astrophysics Conference. AIP, 2010. http://dx.doi.org/10.1063/1.3529969.

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MacKay, W. W., Ahovi Kponou, Yousef Makdisi, and Anatoli Zelenski. "Prospects for Acceleration of Deuterons and Helions." In POLARIZED ION SOURCES, TARGETS AND POLARIMETRY. AIP, 2008. http://dx.doi.org/10.1063/1.2888087.

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Buttimore, N. H., Roberto Fiore, Igor Ivanov, Alessandro Papa, and Jacques Soffer. "Forward Helion Scattering and Neutron Polarization." In DIFFRACTION 2008: International Workshop on Diffraction in High Energy Physics. AIP, 2009. http://dx.doi.org/10.1063/1.3122170.

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Ayik, Aban, Nelson Ijumba, Charles Kabiri, and Philippe Goffin. "Estimation of Solar Resource Potential in South Sudan Using Heliosat-4 Method." In 2018 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC). IEEE, 2018. http://dx.doi.org/10.1109/appeec.2018.8566301.

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Hilchenbach, M., R. Kallenbach, K. C. Hsieh, A. Czechowski, Jakobus le Roux, Gary P. Zank, Andrew J. Coates, and Vladimir Florinski. "Energetic Neutral Atoms from the Heliotail Direction and their Potential Source Regions." In PICKUP IONS THROUGHOUT THE HELIOSPHERE AND BEYOND: Proceedings of the 9th Annual International Astrophysics Conference. AIP, 2010. http://dx.doi.org/10.1063/1.3529995.

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Riveros-Rosas, David, María E. Sánchez-Diaz, Víctor M. Velasco-Herrera, Adriana E. González-Cabrera, Mauro Valdés-Barrón, and Luis F. Zarzalejo. "Implementation of the heliosat 2 model in Mexico from GOES 13 satellités images." In SOLARPACES 2020: 26th International Conference on Concentrating Solar Power and Chemical Energy Systems. AIP Publishing, 2022. http://dx.doi.org/10.1063/5.0085648.

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Choi, Wonseok, Ahram Song, and Yongil Kim. "Estimation of solar radiation by using modified Heliosat-II method and COMS-MI imagery." In SPIE Remote Sensing, edited by Adolfo Comerón, Evgueni I. Kassianov, and Klaus Schäfer. SPIE, 2015. http://dx.doi.org/10.1117/12.2194743.

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Zhang, Mingwei, Jian Liu, Jinlong Fan, and Hui Deng. "Evaluation of Heliosat-II method of deriving solar irradiation from FY-2 images in China." In SPIE Remote Sensing, edited by Christopher M. U. Neale and Antonino Maltese. SPIE, 2012. http://dx.doi.org/10.1117/12.974451.

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Naranjo-Villalón, Krystine, and Israel Borrajero-Montejo. "Statistical Correction of the Distribution of Solar Radiation, Estimated by the Heliosat Method for Cuba." In ECAS 2022. Basel Switzerland: MDPI, 2022. http://dx.doi.org/10.3390/ecas2022-12862.

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Reports on the topic "Helional"

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MacKay W. W. Prospects for Acceleration of Deuterons and Helions. Office of Scientific and Technical Information (OSTI), November 2007. http://dx.doi.org/10.2172/1061887.

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Gardner, C. J. Simulations of Merging Helion Bunches on the AGS Injection Porch. Office of Scientific and Technical Information (OSTI), August 2014. http://dx.doi.org/10.2172/1157498.

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Gardner, C. J. FY2014 Parameters for Helions and Gold Ions in Booster, AGS, and RHIC. Office of Scientific and Technical Information (OSTI), August 2014. http://dx.doi.org/10.2172/1159691.

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