Academic literature on the topic 'GeoIP'

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Journal articles on the topic "GeoIP"

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Park, Kwang-Cheol, Young-Hwan Lim, Jong-In Lim, and Won-Hyung Park. "Performance Improvement for Increased Communication Speed in Anonymous Network using GeoIP." Journal of Society for e-Business Studies 16, no. 4 (November 30, 2011): 75–85. http://dx.doi.org/10.7838/jsebs.2011.16.4.075.

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Pahlevi, Arisauna M., Ibnu Sofian, Dyah Pangastuti, and Antonius B. Wijanarto. "UPDATING MODEL GEOID INDONESIA." Seminar Nasional Geomatika 3 (February 15, 2019): 761. http://dx.doi.org/10.24895/sng.2018.3-0.1063.

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Geoid merupakan referensi tinggi di Indonesia sesuai amanat Peraturan Kepala BIG (Perka BIG) nomor 15 Tahun 2013 tentang Sistem Referensi Geospasial Indonesia (SRGI). Melalui website http://srgi.big.go.id/srgi2, BIG secara bertahap memenuhi kebutuhan masyarakat terkait dengan sistem referensi geospasial termasuk di dalamnya informasi model geoid Indonesia. Model geoid Indonesia yang dihasilkan pada tahun 2013 merupakan model geoid Indonesia yang diolah berbasis pulau. pada tahun 2018, dilakukan updating model geoid Indonesia. Tujuannya untuk menghasilkan model geoid Indonesia secara keseluruhan atau terintegrasi di seluruh wilayah Indonesia. Data yang digunakan adalah; Data spherical harmonic beberapa model geoid global sebagai data gelombang panjang, data gelombang menengah menggunakan Data DTU-10, data gayaberat airborne wilayah Pulau Sulawesi, Kalimantan dan Papua. Sedangkan data gelombang pendek menggunakan Data SRTM-15 meter. Metode yang digunakan dalam pemodelan geoid adalah metode Fast Fourier Transform (FFT). Data-data tersebut diolah dengan menggunakan perangkat lunak gravsoft yang telah dimodifikasi di sesuaikan dengan kebutuhan Indonesia. Validasi model geoid dilakukan dengan membandingkan nilai geoid gravimetrik hasil pengolahan model geoid dari data gayaberat, dengan nilai geoid geometrik dari pengukuran GNSS di pilar Tanda Tinggi Geodesi (TTG). Dari pengolahan data, menghasilkan model geoid dari beberapa data komponen gelombang panjang yang berbeda. Model geoid dengan standar deviasi terkecil adalah model geoid yang diperoleh dari kombinasi komponen gelombang panjang EGM2008 - derajat 2190 dengan nilai standar deviasi 0.2283. Metode pemodelan geoid secara menyeluruh di seluruh wilayah Indonesia lebih relevan dilakukan di negara kepulauan seperti Indonesia, dikarenakan lebih memudahkan unifikasi model geoid antara darat dan laut.
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Truong, Nguyen Ngoc, and Tran Van Nhac. "Determination of the constant Wo for local geoid of Vietnam and it’s systematic deviation from the global geoid." Tạp chí Khoa học và Công nghệ biển 17, no. 4B (December 15, 2017): 138–44. http://dx.doi.org/10.15625/1859-3097/17/4b/13001.

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Constant Wo, defining the geoid, has important applications in the area of physical geodesy. With the development of artificial Earth satellite, constant Wo for the global geoid approximating the oceans on Earth can be calculated from an expansion of spherical harmonics - Stokes constants determined by observation of perturbations in artificial satellite’s orbits. However, the Stokes constants are limited, therefore the geoid constant Wo could not be calculated for local geoid (state geoid) from the mentioned expansion of spherical harmonics. In this paper, we present a method to determine the constant Wo for local geoid of Vietnam, using generalized Bruns formula and Neyman boundary problem. The initial data used are Faye gravity anomalies surveyed on land and sea of Southern Vietnam. The constant Wo is then used to calculate the systematic deviation of the local geoid of Vietnam from the global geoid EGM - 96.
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Pisetskaya, Olga, and Alexander Yarmolenko. "Problem of Determining a Geoid." Baltic Surveying 8 (October 31, 2018): 85–92. http://dx.doi.org/10.22616/j.balticsurveying.2018.011.

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The issue of the study of the problem of determining the geoid and quasi-geoid models is considered. Development of methods for constructing an exact geoid model using different dimensions. Analysis of the calculation of normal heights using satellite measurements, construction of geoid and quasi-geoid models by different methods is performed. Based on the results of the analytical review of existing methods for determining the geoid, it was proposed to use various data (geodetic heights, mixed gravity anomalies, anomalous potential) to construct this model, which allows building a model of a geoid with millimetre accuracy. The possibility of using the collocation method is considered. The task is to develop a methodology for constructing a geoid model using a network of low density gravity points and using pure and mixed gravity anomalies, which allows us to solve the problem of finding potential by solving the Laplace equation or using wavelets.
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Reguzzoni, Mirko, Daniela Carrion, Carlo Iapige De Gaetani, Alberta Albertella, Lorenzo Rossi, Giovanna Sona, Khulan Batsukh, et al. "Open access to regional geoid models: the International Service for the Geoid." Earth System Science Data 13, no. 4 (April 21, 2021): 1653–66. http://dx.doi.org/10.5194/essd-13-1653-2021.

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Abstract. The International Service for the Geoid (ISG, https://www.isgeoid.polimi.it/, last access: 31 March 2021) provides free access to a dedicated and comprehensive repository of geoid models through its website. In the archive, both the latest releases of the most important and well-known geoid models, as well as less recent or less known ones, are freely available, giving to the users a wide range of possible applications to perform analyses on the evolution of the geoid computation research field. The ISG is an official service of the International Association of Geodesy (IAG), under the umbrella of the International Gravity Field Service (IGFS). Its main tasks are collecting, analysing, and redistributing local, regional, and continental geoid models and providing technical support to people involved in geoid-related topics for both educational and research purposes. In the framework of its activities, the ISG performs research taking advantage of its archive and organizes seminars and specific training courses on geoid determination, supporting students and researchers in geodesy as well as distributing training material on the use of the most common algorithms for geoid estimation. This paper aims at describing the data and services, including the newly implemented DOI Service for geoid models (https://dataservices.gfz-potsdam.de/portal/?fq=subject:isg, last access: 31 March 2021), and showing the added value of the ISG archive of geoid models for the scientific community and technicians, like engineers and surveyors (https://www.isgeoid.polimi.it/Geoid/reg_list.html, last access: 31 March 2021).
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Lukoševičius, Viktoras. "DFHRS-BASED COMPUTATION OF QUASI-GEOID OF LATVIA." Geodesy and Cartography 39, no. 1 (April 12, 2013): 11–17. http://dx.doi.org/10.3846/20296991.2013.788827.

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In geodesy, civil engineering and related fields high accuracy coordinate determination is needed, for that reason GNSS technologies plays important role. Transformation from GNSS derived ellipsoidal heights to orthometric or normal heights requires a high accuracy geoid or quasi-geoid model, respectively the accuracy of the currently used Latvian gravimetric quasi-geoid model LV'98 is 6–8 cm. The objective of this work was to calculate an improved quasi-geoid (QGeoid) for Latvia. The computation was performed by applying the DFHRS software. This paper discusses obtained geoid height reference surface, its comparisons to other geoid models, fitting point statistics and quality control based on independent measurements.
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Pa’suya, M. F., A. H. M. Din, J. C. McCubbine, A. H. Omar, Z. M. Amin, and N. A. Z. Yahaya. "GRAVIMETRIC GEOID MODELLING OVER PENINSULAR MALAYSIA USING TWO DIFFERENT GRIDDING APPROACHES FOR COMBINING FREE AIR ANOMALY." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-4/W16 (October 1, 2019): 515–22. http://dx.doi.org/10.5194/isprs-archives-xlii-4-w16-515-2019.

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Abstract. We investigate the use of the KTH Method to compute gravimetric geoid models of Malaysian Peninsular and the effect of two differing strategies to combine and interpolate terrestrial, marine DTU17 free air gravity anomaly data at regular grid nodes. Gravimetric geoid models were produced for both free air anomaly grids using the GOCE-only geopotential model GGM GO_CONS_GCF_2_SPW_R4 as the long wavelength reference signal and high-resolution TanDEM-X global digital terrain model. The geoid models were analyzed to assess how the different gridding strategies impact the gravimetric geoid over Malaysian Peninsular by comparing themto 172 GNSS-levelling derived geoid undulations. The RMSE of the two sets of gravimetric geoid model / GNSS-levelling residuals differed by approx. 26.2 mm. When a 4-parameter fit is used, the difference between the RMSE of the residuals reduced to 8 mm. The geoid models shown here do not include the latest airborne gravity data used in the computation of the official gravimetric geoid for the Malaysian Peninsular, for this reason they are not as precise.
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Infante, Claudia, Claudia Tocho, and Daniel Del Cogliano. "ANALYSIS OF ISOSTATICALLY-BALANCED CORTICAL MODELS USING MODERN GLOBAL GEOPOTENTIAL MODELS." Boletim de Ciências Geodésicas 23, no. 4 (December 2017): 623–35. http://dx.doi.org/10.1590/s1982-21702017000400041.

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Abstract: The knowledge of the Earth's gravity field and its temporal variations is the main goal of the dedicated gravity field missions CHAMP, GRACE and GOCE. Since then, several global geopotential models (GGMs) have been released. This paper uses geoid heights derived from global geopotential models to analyze the cortical features of the Tandilia structure which is assumed to be in isostatic equilibrium. The geoid heights are suitably filtered so that the structure becomes apparent as a residual geoid height. Assuming that the geological structure is in isostatic equilibrium, the residual geoid height can be assimilated and compared to the isostatic geoid height generated from an isostatically compensated crust. The residual geoid height was obtained from the EGM2008 and the EIGEN-6C4 global geopotential models, respectively. The isostatic geoid was computed using the cortical parameters from the global crustal models GEMMA and CRUST 1.0 and from local parameters determined in the area under study. The obtained results make it clear that the isostatic geoid height might become appropriate to validate crustal models if the structures analyzed show evidence of being in isostatic equilibrium.
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Eshagh, Mehdi. "Error calibration of quasi-geoidal, normal and ellipsoidal heights of Sweden using variance component estimation." Contributions to Geophysics and Geodesy 40, no. 1 (January 1, 2010): 1–30. http://dx.doi.org/10.2478/v10126-010-0001-9.

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Error calibration of quasi-geoidal, normal and ellipsoidal heights of Sweden using variance component estimation Errors of estimated parameters in an adjustment process should be scaled according to the size of the estimated residuals or misclosures. After computing a quasi-geoid (geoid), its biases and tilts, due to existence of systematic errors in the terrestrial data, are removed by fitting a corrective surface to the misclosures of the differences between the GNSS/levelling data and the quasi-geoid (geoid). Variance component estimation can be used to re-scale or calibrate the error of the GNSS/levelling data and the quasi-geoid (geoid) model. This paper uses this method to calibrate the errors of the recent quasi-geoid model, the GNSS and the normal heights of Sweden. Different stochastic models are investigated in this study and based on a 7-parameter corrective surface model and a three-variance component stochastic model, the calibrated error of the quasi-geoid and the normal heights are 6 mm and 5 mm, respectively and the re-scaled error of the GNSS heights is 18 mm.
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Kao, Szu-Pyng, Fang-Shii Ning, Chao-Nan Chen, and Chia-Ling Chen. "USING PARTICLE SWARM OPTIMIZATION TO ESTABLISH A LOCAL GEOMETRIC GEOID MODEL." Boletim de Ciências Geodésicas 23, no. 2 (June 2017): 327–37. http://dx.doi.org/10.1590/s1982-21702017000200021.

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There exist a number of methods for approximating the local geoid surface and studies carried out to determine a local geoid. In this study, performance of geoid by PSO method in modeling local geoid was presented and analyzed. The ellipsoidal heights (h), derived from GPS observations, and known orthometric heights from first-order benchmarks were first used to create local geometric geoid model, then the PSO method was used to convert ellipsoidal heights into orthometric heights (H). The resulting values were used to compare between the spirit leveling and GPS methods. The adopted PSO method can improve the fitting of local geometric geoid by quadratic surface fitting method, which agrees with the known orthometric heights within ±1.02cm
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Dissertations / Theses on the topic "GeoIP"

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Smrčka, Lukáš. "Registrační databáze IP adres." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2015. http://www.nusl.cz/ntk/nusl-220537.

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This thesis is focused on finding the physical location of stations by the passive geolocation techniques, particularly using the registration database of IP addresses. The first two part are focused on a theoretical analysis of this problem, the next two parts of this thesis deal with the solution of this problem and discussion of the results.
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Dvořák, Filip. "Využití znalosti topologie páteřních sítí pro určování fyzické polohy stanic v síti Internet." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219422.

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The thesis discusses about modern geolocation methods and it describes the basic principles of their work. The work is divided into 2 parts - the theoretical one and the practical one. The first part of the thesis is focused on the description of these methods and on the explanation of its basic concepts which are used for determining of the physical position of the station according to its IP address. The second more extensive part of the work focuses on the description of the realization of algorithm in the Octant method in the programming language of Java and its use in the experimental net of PlanetLab. One important thing is to create a set of reference points and targets, which are necessary for the testing of the whole algorithm of the Octant Method. The results of estimated accuracy of target location obtained by the Octant method and their comparison with the results obtained by active methods of CBG, SOI and with the passive method of GeoIP are listed at the end of this work.
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Boener, Joseph H. "Monterey Bay geoid." Thesis, Monterey, California. Naval Postgraduate School, 1994. http://hdl.handle.net/10945/30875.

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A high resolution local geoid was calculated for the Monterey Bay, CA using local gravimetry data, digital elevation data and The Ohio State University OSU91A global geopotential model. The theoretical accuracy of the calculated local geoid is 3.5 cm or better over 5 km. Local gravity data came from three sources: 1,549 land observations from the Defense Mapping Agency, 179 bottom gravity observations from two Naval Postgraduate School gravity surveys of Monterey Bay and 17,098 National Geodetic Survey land and ship gravity observations from the National Geophysical Data Center's Gravity CD-ROM. Digital terrain elevation data came from the Rocky Mountain Communication Inc. 3 Arc Second Digital Terrain Elevation CD-ROM. A GPS sea surface topography experiment conducted in October, 1993, had indicated an anomalous sea slope across the bay from Santa Cruz, California to Monterey, California. Comparisons between the calculated local geoid and the regional geoid for The United States, the National Geodetic Survey's GEOID93 indicated a possible explanation for the anomalous sea slope being a local slope in the geoid. Geoid, Monterey Bay, Sea surface.
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Li, Yecai. "Airborne gravimetry for geoid determination." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0018/NQ54797.pdf.

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Gerrard, Sara Margaret Elizabeth. "The geoid, GPS and levelling." Thesis, University of Nottingham, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.278288.

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Lerke, Otto. "GRACE-Eismassenbilanz." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2007. http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-33282.

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Twigg, D. R. "Finite element interpolation of geoid heights." Thesis, University of Newcastle Upon Tyne, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.355479.

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Garcia, Ramon V. "Local geoid determination from GRACE mission /." The Ohio State University, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=osu1486398195325232.

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Ellmann, Artu. "The geoid for the Baltic countries determined by the least squares modification of Stokes´formula." Doctoral thesis, KTH, Infrastructure, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3744.

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Precise knowledge of the geoid contributes to the studies ofthe Earth’s interior, the long-term geophysical processesand to oceanography. An accurate regional geoid model, inparticular, enables the user in many cases to replace thetraditional height determination techniques by faster and morecost-effective GPS-levelling.

In regional gravimetric geoid determination, it has becomecustomary to utilize the modified Stokes formula, whichcombines local terrestrial data with a global geopotentialmodel. The Dissertation is devoted to the determination of ahighresolution geoid model for the three Baltic countries–Estonia, Latvia and Lithuania. Six differentdeterministic and stochastic modification methods are tested.These are: Wong and Gore (1969), Vincent and Marsh (1974),Vaníèek and Kleusberg (1987) and the biased, unbiasedand optimum least squares modifications by Sjöberg (1984b,1991, 2003d). Three former methods employ originally theresidual anomaly in Stokes’integral. For the sake ofcomparison these methods are expressed such that the fullgravity anomaly is utilised in all the six methods.

The contribution of different error sources for geoidmodelling is studied by means of the expected global meansquare error (MSE). The least squares methods attempt tominimise all relevant error sources in geoid modelling byspecially determined modification parameters. Part of thepresent study contributes to some important computationalaspects of the least squares parameters sn.

This study employs the new geopotential model GGM01s, whichis compiled from data of the GRACE twin-satellites. Three sets(one from each country) of GPSlevelling points were used for anindependent evaluation of computed geoid models. Generally, thepost-fit residuals from the least squares modifications areslightly smaller (up to 1 cm) than the respective values ofdeterministic methods. This could indicate that the efforts putinto minimization of the global MSE have been advantageous.

The geoid model computed by the unbiased LS modificationprovides the“best”post-fit statistics and it isthus preferred as the final representation of the joint Balticgeoid. The modification parameters of this model are calculatedfrom the following initial conditions: (1) upper limit of theGGM01s and the modification degree of Stokes’function areboth set to 67, (2) terrestrial anomaly error variance andcorrelation length are set to 1 mGal2 and 0.1°,respectively, (3) integration cap size is 2°. Thisapproximate geoid model is supplemented by separately computedadditive corrections (the combined topographic and atmosphericeffects and ellipsoidal correction), which completes the geoidmodelling procedures. The new geoid model for the Balticcountries is named BALTgeoid-04. The RMS of the GPS-levellingpost-fit residuals are as follows: 5.3 cm for the joint Balticgeoid model and 2.8, 5.6 and 4.2 cm for Estonia, Latvia andLithuania, respectively. This fit indicates the suitability ofthe new geoid model for many practical applications.

Key words: geoid:Stokes’formula, deterministicand stochastic modifications, least squares, additivecorrections, GRACE, Baltic.

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Azmoudeh-Ardalan, Alireza. "High resolution regional geoid computation in the world geodetic datum 2000 based upon collocation of linearized observational functionals of the type GPS, gravity potential and gravity intensity /." [S.l.] : Universität Stuttgart , Fakultät Bauingenieur- und Vermessungswesen , Geodätisches Institut, 1999. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB8733302.

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Books on the topic "GeoIP"

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Sansò, Fernando, and Michael G. Sideris, eds. Geoid Determination. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-540-74700-0.

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Sünkel, Hans, and Iginio Marson, eds. Gravity and Geoid. Berlin, Heidelberg: Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/978-3-642-79721-7.

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Marti, Urs. Geoid der Schweiz, 1997. Zürich, Switzerland: Schweizerische Geodätische Kommission, 1997.

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Rapp, Richard H., and Fernando Sansò, eds. Determination of the Geoid. New York, NY: Springer New York, 1991. http://dx.doi.org/10.1007/978-1-4612-3104-2.

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Sansò, Fernando. Geoid Determination: Theory and Methods. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013.

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Mertikas, Stelios P., ed. Gravity, Geoid and Earth Observation. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-10634-7.

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Marti, Urs, ed. Gravity, Geoid and Height Systems. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-10837-7.

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Sideris, Michael G., ed. Gravity, Geoid and Geodynamics 2000. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-662-04827-6.

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Jekeli, Christopher, Luisa Bastos, and Joana Fernandes, eds. Gravity, Geoid and Space Missions. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/b138327.

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Segawa, Jiro, Hiromi Fujimoto, and Shuhei Okubo, eds. Gravity, Geoid and Marine Geodesy. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-662-03482-8.

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Book chapters on the topic "GeoIP"

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Pan, Lanlan, Xuebiao Yuchi, Xin Zhang, Anlei Hu, and Jian Wang. "Improving Privacy for GeoIP DNS Traffic." In Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, 1–13. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-14413-5_1.

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Banerjee, Paramesh. "Geoid." In Encyclopedia of Solid Earth Geophysics, 353–56. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-90-481-8702-7_101.

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Banerjee, Paramesh. "Geoid." In Encyclopedia of Solid Earth Geophysics, 1–6. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-10475-7_101-1.

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Banerjee, Paramesh. "Geoid." In Encyclopedia of Solid Earth Geophysics, 465–70. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-58631-7_101.

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Wang, Yan Ming, Jianliang Huang, Tao Jiang, and Michael G. Sideris. "Local Geoid Determination." In Encyclopedia of Geodesy, 1–10. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-02370-0_53-1.

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Sideris, Michael G. "Geoid, Computational Method." In Encyclopedia of Solid Earth Geophysics, 366–71. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-90-481-8702-7_225.

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Vaníček, Petr. "Geoid Undulation, Interpretation." In Encyclopedia of Solid Earth Geophysics, 362–66. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-90-481-8702-7_86.

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Vaníček, Petr. "Geoid Undulation, Interpretation." In Encyclopedia of Solid Earth Geophysics, 1–5. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-10475-7_86-1.

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Vaníček, Petr. "Geoid Undulation, Interpretation." In Encyclopedia of Solid Earth Geophysics, 482–86. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-58631-7_86.

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Jiang, Z. "Geoid determination in France." In International Association of Geodesy Symposia, 486–93. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-662-03482-8_65.

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Conference papers on the topic "GeoIP"

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Fang, Dong, Cheng Chengqi, and Guo Shide. "Design and research on GeoIP." In 2010 14th International Conference on Computer Supported Cooperative Work in Design (CSCWD). IEEE, 2010. http://dx.doi.org/10.1109/cscwd.2010.5472009.

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Jafari, Seyed Jalal, and HamidReza Naji. "GeoIP clustering: Solving replica server placement problem in content delivery networks by clustering users according to their physical locations." In 2013 5th Conference on Information and Knowledge Technology (IKT). IEEE, 2013. http://dx.doi.org/10.1109/ikt.2013.6620120.

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Kowalczyk, Kamil, and Joanna Kuczynska-Siehien. "Testing Correlation between Vertical Crustal Movements and Geoid Uplift for North Eastern Polish Border Areas." In Environmental Engineering. VGTU Technika, 2017. http://dx.doi.org/10.3846/enviro.2017.206.

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Long time span of observations from GNSS permanent stations can be used in the development of models of vertical crustal movements. The absolute vertical crustal movement related to the ellipsoid consists of the observed movement with relation to the mean sea level, the eustatic movement and the geoid uplift. The geoid uplift can be determined from GRACE satellite mission observations. The calculated parameters can be compared with the theoretical ones. The aim of this study is to check the correlation between vertical crustal movements and a geoid height variations determined from satellite data. GNSS data, levelling data and satellite observations for north eastern Polish border areas were used as a case study. Temporal variations of geoid were calculated based on the geopotential models from GRACE satellite observations. The obtained results give an overview of a possibility of the proposed method usage.
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Philipp, Dennis, Volker Perlick, Dirk Puetzfeld, Eva Hackmann, and Claus Lammerzahl. "The relativistic geoid." In 2017 IEEE International Workshop on Metrology for AeroSpace (MetroAeroSpace). IEEE, 2017. http://dx.doi.org/10.1109/metroaerospace.2017.7999549.

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Abdullah, Nurzaitie Aflah, Muhammad Daud Mahdzur, and Saiful Aman Hj Sulaiman. "Numerical Analysis of Gravimetric Geoid and Geometrical Geoid over Peninsular Malaysia." In 2021 IEEE 12th Control and System Graduate Research Colloquium (ICSGRC). IEEE, 2021. http://dx.doi.org/10.1109/icsgrc53186.2021.9515303.

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Dumitru, Paul. "APPROACHES ON GEOID MODELLING." In 13th SGEM GeoConference on INFORMATICS, GEOINFORMATICS AND REMOTE SENSING. Stef92 Technology, 2013. http://dx.doi.org/10.5593/sgem2013/bb2.v2/s09.008.

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Birylo, Monika, and Katarzyna Pajak. "Statistical Approach to the Computation of an Influence of the Yangtze Dam on Gravity Fluctuations." In Environmental Engineering. VGTU Technika, 2017. http://dx.doi.org/10.3846/enviro.2017.165.

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Due to the realization of the Three Gorges Dam on the Yangtze River and its content of 40 billion tons of water many geodynamical consequences can still be observed. It is obvious that global geodynamical changes are noticeable at whole basin of the Yangtze river. Such changes can be observed by the GRACE (Gravity Recovery and Climate Experiment) gravimetric satellites (Ilk et al. 2005). The GRACE gravity field model data are available in the form of spherical harmonic expansion; by defining a specific filter, one can compute geoid variations at specific locations. As a reference, EGM2008 model was used, on its basis geoid variations were determined. According to the results, geoid variations at the Yangtze river become more stable after filling the Dam. In the article a statistical methods were used for the purpose of the evaluation of a differences EGM08-GRACE time series in the area of the Three Gorges Dam. In the article the authors want to present trend analysis and short-term forecasting with ARIMA model usage.
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Sulaiman, S. A. H., K. H. Talib, M. A. M. Wazir, and O. M. Yusof. "Evaluation of geoid height derived by geopotential model and existing regional geoid model." In 2013 IEEE 9th International Colloquium on Signal Processing & its Applications (CSPA). IEEE, 2013. http://dx.doi.org/10.1109/cspa.2013.6530024.

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Dumitru, Paul. "GEOID MODELLING FOR GIS APPLICATIONS." In 13th SGEM GeoConference on INFORMATICS, GEOINFORMATICS AND REMOTE SENSING. Stef92 Technology, 2013. http://dx.doi.org/10.5593/sgem2013/bb2.v1/s08.015.

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Shoganbekova, Daniya. "GRAVIMETRIC GEOID MODEL OVER KAZAKHSTAN." In 15th International Multidisciplinary Scientific GeoConference SGEM2015. Stef92 Technology, 2011. http://dx.doi.org/10.5593/sgem2015/b22/s9.035.

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Reports on the topic "GeoIP"

1

Nagy, D. Gravimetric geoid map of Canada. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1989. http://dx.doi.org/10.4095/127248.

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Nagy, D. Gravity field representation over Canada for Geoid Computation. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1990. http://dx.doi.org/10.4095/128048.

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Tiruneh, Dawit, Ricardo Sabates, and Tassew Woldehanna. Disadvantaged Schools and Students in Ethiopia: Why is the GEQIP-E Reform Necessary? Research on Improving Systems of Education (RISE), April 2021. http://dx.doi.org/10.35489/bsg-rise-ri_2021/026.

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This Insight provides an overview of the prevalence of inequity in access to quality primary education for children and particularly girls living in the emerging regions, and children with disabilities in Ethiopia.
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Asgedom, Amare, Belay Hagos Hailu, Girma Lemma, Pauline Rose, Tirussew Teferra, and Darge Wole Meshesha. Whose Influence and Whose Priorities? Insights from Government and Donor Stakeholders on the Design of the Ethiopian General Education Quality Improvement for Equity (GEQIP-E) Programme. Research on Improving Systems of Education (RISE), October 2019. http://dx.doi.org/10.35489/bsg-rise-ri_2019/012.

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Asgedom, Amare, Shelby Carvalho, and Pauline Rose. Negotiating Equity: Examining Priorities, Ownership, and Politics Shaping Ethiopia’s Large-Scale Education Reforms for Equitable Learning. Research on Improving Systems of Education (RISE), March 2020. http://dx.doi.org/10.35489/bsg-rise-wp_2021/067.

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In 2018, the Government of Ethiopia committed to large-scale, donor-supported reforms aimed at improving equitable learning in the basic education system—the General Education Quality Improvement Program for Equity (GEQIP-E). In this paper, we examine the reform design process in the context of Ethiopia’s political environment as a strong developmental state, assessing the influence of different stakeholder priorities which have led to the focus on equity within the quality reforms. Drawing on qualitative data from 81 key informant interviews with federal and regional government officials and donors, we explore the negotiation and power dynamics which have shaped the design of the reforms. We find that a legacy of moderately successful reforms, and a shared commitment to global goals, paved the way for negotiations of more complex and ambitious reforms between government actors and donors. Within government, we identify that regional governments were only tokenistically included in the reform process. Given that regions are responsible for the implementation of these reforms, their limited involvement in the design could have implications for success.
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