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Relevant bibliographies by topics / F3-layer

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Journal articles
Dissertations / Theses
Conference papers

Academic literature on the topic 'F3-layer'

Author: Grafiati

Published: 6 September 2023

Last updated: 19 July 2025

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Journal articles on the topic "F3-layer"

1

Sreeja, V., S. Ravindran, and T. K. Pant. "Features of the F3 layer occurrence over the equatorial location of Trivandrum." Annales Geophysicae 28, no. 9 (2010): 1741–47. http://dx.doi.org/10.5194/angeo-28-1741-2010.

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Abstract. The general features of the F3 layer occurrence over the magnetic equatorial location of Trivandrum (8.5° N; 77° E; dip lat ~0.5° N) in India during the period from 1996–2005 are presented using the ionosonde observations. The study brings out that the F3 layer occurrence over Trivandrum is weak and rare compared to the other equatorial locations. The F3 layer occurrence is relatively more pronounced during the magnetically active conditions, thus indicating the dependence of the layer formation over Trivandrum on magnetic activity. It is also observed that the percentage occurrence

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Jenkins, B., G. J. Bailey, M. A. Abdu, I. S. Batista, and N. Balan. "Observations and model calculations of an additional layer in the topside ionosphere above Fortaleza, Brazil." Annales Geophysicae 15, no. 6 (1997): 753–59. http://dx.doi.org/10.1007/s00585-997-0753-3.

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Abstract. Calculations using the Sheffield University plasmasphere ionosphere model have shown that under certain conditions an additional layer can form in the low latitude topside ionosphere. This layer (the F3 layer) has subsequently been observed in ionograms recorded at Fortaleza in Brazil. It has not been observed in ionograms recorded at the neighbouring station São Luis. Model calculations have shown that the F3 layer is most likely to form in summer at Fortaleza due to a combination of the neutral wind and the E×B drift acting to raise the plasma. At the location of São Luis, almost o

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Batista, I. S., M. A. Abdu, A. M. da Silva, and J. R. Souza. "Ionospheric F3 layer: Implications for the IRI model." Advances in Space Research 31, no. 3 (2003): 607–11. http://dx.doi.org/10.1016/s0273-1177(03)00023-1.

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Depuev, V. H., and S. A. Pulinets. "Intercosmos-19 observations of an additional topside ionization layer: the F3 layer." Advances in Space Research 27, no. 6-7 (2001): 1289–92. http://dx.doi.org/10.1016/s0273-1177(01)00205-8.

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Vikhorev, Alexander V., Ksenia V. Strygina, and Elena K. Khlestkina. "Duplicated flavonoid 3’-hydroxylase and flavonoid 3’, 5’-hydroxylase genes in barley genome." PeerJ 7 (January 15, 2019): e6266. http://dx.doi.org/10.7717/peerj.6266.

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Background Anthocyanin compounds playing multiple biological functions can be synthesized in different parts of barley (Hordeum vulgare L.) plant. The diversity of anthocyanin molecules is related with branching the pathway to alternative ways in which dihydroflavonols may be modified either with the help of flavonoid 3′-hydroxylase (F3′H) or flavonoid 3′,5′-hydroxylase (F3′5′H)—the cytochrome P450-dependent monooxygenases. The F3′H and F3′5′H gene families are among the least studied anthocyanin biosynthesis structural genes in barley. The aim of this study was to identify and characterise du

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Zain, A. F. M., S. Abdullah, M. J. Homam, F. C. Seman, M. Abdullah, and Y. H. Ho. "Observations of the F3-layer at equatorial region during 2005." Journal of Atmospheric and Solar-Terrestrial Physics 70, no. 6 (2008): 918–25. http://dx.doi.org/10.1016/j.jastp.2007.12.002.

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Handayani, Nestri, Subagus Wahyuono, Triana Hertiani, and Retno Murwanti. "Immunomodulatory activity and phytochemical content determination of fractions of suji leaves (Dracaena angustifolia (Medik.)Roxb.)." Food Research 4, no. 1 (2019): 85–90. http://dx.doi.org/10.26656/fr.2017.4(1).228.

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Suji is a plant that has long been used as food colorant and medicinal plant in Indonesia. This study aimed to determine the immunomodulatory activity of fractions obtained from suji leaves by using in vitro phagocytic macrophage assay and also to determine the phytochemical compounds of the most active fraction. Initially, Suji dry leaves powder were macerated with 96% ethanol upon filtration, then the filtrate obtained was evaporated to dryness. The extract obtained was triturated with chloroform to give fraction soluble (F1) and insoluble fraction (F2). Then, F1 was partitioned using a mixt

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Antos, Piotr A., Anna Hrabia, Anna Gdula, and Andrzej Sechman. "Apoptosis in chicken ovarian follicles following in vitro exposure to TCDD, PCB 126 and PCB 153." Annals of Animal Science 17, no. 3 (2017): 787–98. http://dx.doi.org/10.1515/aoas-2016-0087.

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Abstract The study was conducted in order to compare the in vitro effect of 2,3,7,8-tetrachlorodibenzo-pdioxin (TCDD), 3,3′,4,4′,5-pentachlorobiphenyl (PCB 126) and 2,2′,4,4′,5,5′-hexachlorobiphenyl (PCB 153) on the number of apoptotic cells and the activity of caspase-3 in chicken ovarian follicles. The ovarian stroma, white (WF) and yellowish (YF) prehierarchical follicles and fragments of the theca and granulosa layers of the 3 largest preovulatory follicles (F3-F1) were in vitro exposed to TCDD (10 nM), PCB 126 (10 nM) and PCB 153 (10 μM) for 24 h. After incubation the number of apoptotic

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Mridula, N., and Tarun Kumar Pant. "On the F3 layer occurrence and drift over the equatorial location of Thiruvananthapuram." Advances in Space Research 69, no. 10 (2022): 3717–25. http://dx.doi.org/10.1016/j.asr.2022.02.057.

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Karpachev, A. T., M. V. Klimenko, V. V. Klimenko, and V. P. Kuleshova. "Statistical study of the F3 layer characteristics retrieved from Intercosmos-19 satellite data." Journal of Atmospheric and Solar-Terrestrial Physics 103 (October 2013): 121–28. http://dx.doi.org/10.1016/j.jastp.2013.01.010.

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Dissertations / Theses on the topic "F3-layer"

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Wu, Zhengguang. "A STUDY OF THE F3 LAYER AND IONOSPHERIC HORIZONTAL GRADIENT OBSERVED BY THE ARECIBO INCOHERENT SCATTER RADAR." Miami University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=miami1501971684516088.

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Nayak, Chinmaya Kumar. "Study of the variability of equatorial and low latitude ionosphere in the Indian region using radio waves." Thesis, Indian Institute of Geomagnetism, Mumbai, 2013. http://localhost:8080/xmlui/handle/123456789/215.

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A thesis submitted to the University of Mumbai for the Ph.D (Science) Degree in Physics under the guidance of Dr. Satyavir Singh.<br>This thesis addresses three different aspects of the equatorial ionosphere during a period of extended solar minimum (2007-2009). Chapter I gives a detailed introduction to various features of the equatorial ionosphere while the chapters II, III, and IV discusses the work done during the course of this thesis. In this chapter, the summary and conclusions of the research work presented in the thesis have been discussed, with the scope for the future investigations

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Conference papers on the topic "F3-layer"

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Batista, I. S., M. A. Abdu, A. M. Silva, and J. R. Souza. "Long Term Trends In F3 Layer Over Fortaleza, Brazil." In 7th International Congress of the Brazilian Geophysical Society. European Association of Geoscientists & Engineers, 2001. http://dx.doi.org/10.3997/2214-4609-pdb.217.421.

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de Oliveira*, Virginia Klausner, and Paulo Roberto Fagundes. "The formation of F3-layer and the observation of gravity waves during solar maximum and minimum." In 10th International Congress of the Brazilian Geophysical Society & EXPOGEF 2007, Rio de Janeiro, Brazil, 19-23 November 2007. Society of Exploration Geophysicists and Brazilian Geophysical Society, 2007. http://dx.doi.org/10.1190/sbgf2007-408.

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Klausner de Oliveira, Virginia, and Paulo Roberto Fagundes. "The formation of F3-layer and the observation of gravity waves during solar maximum and minimum." In 10th International Congress of the Brazilian Geophysical Society. European Association of Geoscientists & Engineers, 2007. http://dx.doi.org/10.3997/2214-4609-pdb.172.sbgf0376_07.

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Tolstaya, Ekaterina, and Anton Egorov. "Segmentation of Seismic Images." In 31th International Conference on Computer Graphics and Vision. Keldysh Institute of Applied Mathematics, 2021. http://dx.doi.org/10.20948/graphicon-2021-3027-564-570.

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In this paper we propose a method of seismic facies labeling. Given the three-dimensional image cube of seismic sounding data, labeled by a geologist, we first train on the part of the cube, then we propagate labels to the rest of the cube. We use open-source fully annotated 3D geological model of the Netherlands F3 Block. We apply state-of-the-art deep network architecture, adding on top a 3D fully connected conditional random field (CRF) layer. This allows to get smoother labels on data cube cross-sections. Pseudo labeling technique is used to overcome training data scarcity and predict more

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Tolstaya, Ekaterina, and Anton Egorov. "Automatic Neural Network-Based Seismic Facies Classification Using Pseudo-Labels." In International Petroleum Technology Conference. IPTC, 2022. http://dx.doi.org/10.2523/iptc-22084-ms.

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Abstract In this paper we propose a method of seismic facies labeling. Seismic facies labeling task consists of assigning specific geological rock types to the pixels in the seismic cube. In our research we use open-source fully annotated 3D geological model of the Netherlands F3 Block. The dataset is divided into training and test cubes. We use the former to train a state-of-the-art deep learning neural network, adding a 3D conditional random field (CRF) layer as a postprocessing step. We apply the pseudo-labeling technique, where the labels of the test dataset are predicted and added to the

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"Routing strategy using local information based on a two layer cellular automaton model." In 23rd International Congress on Modelling and Simulation (MODSIM2019). Modelling and Simulation Society of Australia and New Zealand, 2019. http://dx.doi.org/10.36334/modsim.2019.f3.zhu.

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