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Journal articles on the topic 'Digital levelling'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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1

El-Ashmawy, Khalid L. A. "ACCURACY, TIME COST AND TERRAIN INDEPENDENCE COMPARISONS OF LEVELLING TECHNIQUES." Geodesy and cartography 40, no. 3 (2014): 133–41. http://dx.doi.org/10.3846/20296991.2014.962727.

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Levelling techniques is classified as geometric levelling, trigonometric levelling and GPS/Levelling depending on used instruments or the methods applied. Accuracies of geometric levelling with using three equipments (Leica NA-720 optical level, Topcon RL-VH4G2 laser level and Leica NA-3003 digital level), the trigonometric levelling with using two equipments (Topcon GTS710 total station and Topcon Imaging Station) and GPS/levelling with using Sokkia GSR2600 receiver were investigated to determine their performances against precise levelling that yields the most precise results. For this purpo
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2

Amerian, Y., and B. Voosoghi. "Least Squares Spectral Analysis for Detection of Systematic Behaviour of Digital Level Compensator." Journal of Geodetic Science 1, no. 1 (2011): 35–40. http://dx.doi.org/10.2478/v10156-010-0005-4.

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Least Squares Spectral Analysis for Detection of Systematic Behaviour of Digital Level CompensatorLevelling is the most precise technique for height difference measurements in geomatics engineering. Various systematic errors affect precise levelling observations and reduce the precision of the observed height differences. This study investigates digital levels residual compensator error and observational method for its elimination. For this purpose the levelling data, which was collected with Zeiss DiNi 12 digital levels, was analysed. There are different statistical and spectral methods that
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Giniotis, Vytautas, Donatas Rekus, and Česlovas Aksamitauskas. "ACCURACY CALIBRATION OF THE BARS OF LEVELLING METERS." Geodesy and cartography 33, no. 4 (2012): 102–5. http://dx.doi.org/10.3846/13921541.2007.9636728.

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Precision levelling is one of the most common geodetic measuring operations. The most modern geodetic instruments are quite sophisticated digital instruments that are supplied by photoelectric sensor arrays and optical–electronic cameras that fix the height values of terrain according to the position of the levelling meter that is placed on it. The marks on the levelling meters are also modified and consist of coded strokes put on the meter’s surface in a specific order. The accuracy of the performance of all the measuring equipment depends mostly on the accuracy of the position of those strok
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4

Rüeger, Jean M. "New Method of Recording and Processing Precise Digital Levelling Data." Australian Surveyor 44, no. 2 (1999): 165–73. http://dx.doi.org/10.1080/00050352.1999.10558792.

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5

Zang, Ying, Shibo Meng, Lian Hu, et al. "Optimization Design and Experimental Testing of a Laser Receiver for Use in a Laser Levelling Control System." Electronics 9, no. 3 (2020): 536. http://dx.doi.org/10.3390/electronics9030536.

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The elevation detection accuracy of the laser receiver in the laser levelling control system directly affects land-levelling operations. To effectively improve the effect of levelling operations and meet the requirements for the accuracy of elevation detection in different industries, this study optimization designed a multilevel adjustable laser receiver. First, we examined the laser signal detection technology and processing circuit, designed the photoelectric conversion array for the detection of the rotating laser, and converted it into a photocurrent signal. We also designed the filter, a
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Figiel, Wojciech. "Levelling the Playing Field with (In)accessible Technologies?" Między Oryginałem a Przekładem 24, no. 41 (2018): 75–88. http://dx.doi.org/10.12797/moap.24.2018.41.04.

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With the development of new technologies, the number of assistive devices/technologies at the disposal of persons with visual impairments has steadily grown. It would thus seem that translation professions have become more accessible. However, it seems that there is a growing gap between the competences indispensable for sighted and blind translators. The more technologically advanced the world of translators becomes, the more surplus technologies have to be mastered by the blind. And some of the digital tools which have become a blessing for sighted translators, such as CAT tools, are hardly
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Foo, Tun Lin, and M. Arul. "OSTEOCUTANEOUS VY FLAP TO PRESERVE LENGTH IN CORONAL OBLIQUE FINGERTIP AMPUTATION." Hand Surgery 18, no. 02 (2013): 297–99. http://dx.doi.org/10.1142/s0218810413970046.

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Radial or ulnar oblique amputations treated by nailbed levelling and local digital flap reconstruction can result in significantly shortened fingertip, narrowed pulp and nail shape distortion. A VY type flap containing bone, sterile matrix, and skin was conceptualised to restore nail and pulp contour for coronal oblique amputations. Technical details and a clinical case are discussed.
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8

Hirt, Christian, and Jakob Flury. "Astronomical-topographic levelling using high-precision astrogeodetic vertical deflections and digital terrain model data." Journal of Geodesy 82, no. 4-5 (2007): 231–48. http://dx.doi.org/10.1007/s00190-007-0173-x.

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9

Sjöström, L., and P. J. Haaland. "Luxation of the long digital extensor tendon as a complication to Tibial Plateau Levelling Osteotomy." Veterinary and Comparative Orthopaedics and Traumatology 20, no. 03 (2007): 224–26. http://dx.doi.org/10.1160/vcot-06-08-0064.

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SummaryCranial cruciate ligament disease in dogs is frequently treated with Tibial Plateau Levelling Osteotomy (TPLO). Herein we describe four cases of dogs presenting with sudden lameness in the operated leg one to 12 months post TPLO surgery. On examination, all of the dogs had a luxation of the long digital extensor tendon (LDE) resulting from the TPLO surgery. All of the dogs underwent revision surgeries. The LDE tendon was either secured in its normal position or transected, and a tenodesis was performed. The dogs recovered well after surgery and lameness was resolved in all four cases.
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Manukyan, Larisa Vladimirovna, Anush Ashotovna Margaryan, Suren Vladimirovich Tovmasyan, and Narine Vahanovna Harutyunyan. "CRUSTAL DISPLACEMENT BASED ON THREE STAGES GEODETIC STUDIES RESULTS IN SPITAK GEODYNAMIC POLYGON." EurasianUnionScientists 2, no. 6(75) (2020): 37–41. http://dx.doi.org/10.31618/esu.2413-9335.2020.2.75.832.

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A network of dual-frequency global navigation satellite systems and digital levelling instruments has been established around Spitak, Armenia with the goal of recording changes to the Earth’s crust near to this major earthquake zone. The study was initiated in response to the 1988 Armenian earthquake and is focused on the Sarighamish, Javakhet, Pambak-Sevan, Spitak and Akhuryan faults. Results demonstrate differential movement across fault zones that suggest monitoring of crustal change could be useful in the predicition of large earthquake events.
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Rákay, Štefan, Slavomír Labant, Karol Bartoš, and Katarína Pukanská. "The influence of artificial illumination of invar levelling rods on the measurements with digital levels." Geodetski vestnik 62, no. 04 (2008): 619–29. http://dx.doi.org/10.15292/geodetski-vestnik.2018.04.619-629.

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12

Origo, Niall, Kim Calders, Joanne Nightingale, and Mathias Disney. "Influence of levelling technique on the retrieval of canopy structural parameters from digital hemispherical photography." Agricultural and Forest Meteorology 237-238 (May 2017): 143–49. http://dx.doi.org/10.1016/j.agrformet.2017.02.004.

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13

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 geoi
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Chernyakov, Mikhail, Olesya Usacheva, and Sergey Gromov. "Classification of agricultural risks of the digital economy." E3S Web of Conferences 273 (2021): 08081. http://dx.doi.org/10.1051/e3sconf/202127308081.

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The current state of the agricultural complex is characterised by a high degree of instability. This sector of the economy is affected by a significant number of factors, both climatic and human-made. Uncertainty in the state and development of the industry creates risks. The digitalisation of all sectors of the economy, on the one hand, is designed to reduce risks; on the other, it itself is the reason that creates new risks. A review of the scientific literature indicates an increased interest in this problem. However, there is a lack of experience in linking agricultural risks to the risks
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15

Menna, F., E. Nocerino, B. Chemisky, F. Remondino, and P. Drap. "ACCURATE SCALING AND LEVELLING IN UNDERWATER PHOTOGRAMMETRY WITH A PRESSURE SENSOR." International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLIII-B2-2021 (June 28, 2021): 667–72. http://dx.doi.org/10.5194/isprs-archives-xliii-b2-2021-667-2021.

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Abstract. Photogrammetry needs known geometric elements to provide metric traceable measurements. These known elements can be a distance between two three-dimensional object points or two camera stations, or a combination of known coordinates and/or angles to solve the seven degrees of freedom that lead to rank deficiency of the normal-equation matrix. In this paper we present a novel approach for scaling and levelling to the local vertical direction an underwater photogrammetric survey. The developed methodology is based on a portable low-cost device designed and realized by the authors that
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16

Salnikov, Valerij G. "IMPROVEMENT OF HIGH-PRECISION LEVELLING METHOD BY DIGITAL LEVELS IN THE CONDITION OF NON-SUFFICIENT LIGHT INTENSITY OF LINED ROD." Vestnik SSUGT (Siberian State University of Geosystems and Technologies) 25, no. 3 (2020): 63–71. http://dx.doi.org/10.33764/2411-1759-2020-25-3-63-71.

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The performing of high-precision geometric leveling by short beams with the purpose of control for the process of building and exploitation of engineering structures and industrial equipment is carried out with visual reading levels or digital levels in case there are a lot of disturbance effects, the basic of which are the vibrations of some equipment in operation, rapid temperature changes, and also non-sufficient and irregular light intensity of bar-code or lined rods. The purpose of the article is the improvement of high-precision leveling method performance by digital levels in the condit
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17

Kuznetsova, Natal′ya S., and Anastasiya G. Shutova. "INTRODUCTION OF DIGITAL MANAGEMENT METHODS IN THE TECHNOLOGICAL PROCESSES OF FLAX TOW YARN PRODUCTION." Technologies & Quality 51, no. 1 (2021): 22–27. http://dx.doi.org/10.34216/2587-6147-2021-1-51-22-27.

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The ways of automating the process chain in a short spinning system, when producing combed yarn, are described in the article. The degree of automation of all stages of the process chain is the subject of the article. In particular, the introduction of digital control methods, when using an automatic layer forming hopper of the production line (the device is protected by a patent of the Russian Federation), which increases the quality of semi-finished products by reducing long sliver unevenness and, consequently, by aligning the sliver coils by mass; application of the automatic sliver levelli
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18

Elshambaky, Hossam Talaat. "Using direct transformation approach as an alternative technique to fuse global digital elevation models with GPS/levelling measurements in Egypt." Journal of Applied Geodesy 13, no. 3 (2019): 159–77. http://dx.doi.org/10.1515/jag-2018-0050.

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Abstract Open global digital elevation models (GDEMs) represent a free and important source of information that is available to any country. Fusion processing between global and national digital elevation models is neither easy nor inexpensive. Hence, an alternative solution to fuse a GDEM (GTOPO30 or SRTM 1) with national GPS/levelling measurements is adopted. Herein, a transformation process between the GDEMs and national GPS/levelling measurements is applied using parametric and non-parametric equations. Two solutions are implemented before and after the filtration of raw data from outliers
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19

Nemorin, Selena. "Post-panoptic pedagogies: The changing nature of school surveillance in the digital age." Surveillance & Society 15, no. 2 (2017): 239–53. http://dx.doi.org/10.24908/ss.v15i2.6033.

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The aim of this paper is to explore critically the everyday conditions of surveillance in the contemporary secondary school context. Using a classical ethnographic approach, it seeks to unpack the range of surveillance practices and processes that are at work within schools as institutional settings, and how these are encountered and experienced by students, teachers, administrators, and other members of a school community. The main concern is with the hypothesized evolution of panoptic to post-panoptic surveillance and whether or not surveillance in schools emulates such developments, specifi
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20

Abdalla, Ahmed, and Saad Mogren. "Implementation of a rigorous least-squares modification of Stokes’ formula to compute a gravimetric geoid model over Saudi Arabia (SAGEO13)." Canadian Journal of Earth Sciences 52, no. 10 (2015): 823–32. http://dx.doi.org/10.1139/cjes-2014-0192.

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A gravimetric geoid model (SAGEO13) is computed for the Kingdom of Saudi Arabia using a rigorous stochastic computational method. The computational methodology is based on a combination of least-squares (LS) modification of Stokes’ formula and the additive corrections for topographic, ellipsoidal, atmospheric, and downward continuation effects on the geoid solution. In this study, we used terrestrial gravity data, a digital elevation model (SRTM3), and seven global geopotential models (GGMs) to compute a new geoid model for Saudi Arabia. The least-squares coefficients are derived based on the
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21

Mirghasempour, M., and A. Y. Jafari. "THE ROLE OF ASTRO-GEODETIC IN PRECISE GUIDANCE OF LONG TUNNELS." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-1-W5 (December 11, 2015): 453–57. http://dx.doi.org/10.5194/isprsarchives-xl-1-w5-453-2015.

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One of prime aspects of surveying projects is guidance of paths of a long tunnel from different directions and finally ending all paths in a specific place. This kind of underground surveying, because of particular condition, has some different points in relation to the ground surveying, including Improper geometry in underground transverse, low precise measurement in direction and length due to condition such as refraction, distinct gravity between underground point and corresponding point on the ground (both value and direction of gravity) and etc. To solve this problems, astro-geodetic that
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22

Gao, Jay. "Towards accurate determination of surface height using modern geoinformatic methods: possibilities and limitations." Progress in Physical Geography: Earth and Environment 31, no. 6 (2007): 591–605. http://dx.doi.org/10.1177/0309133307087084.

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Over recent decades several modern geoinformatic height-finding methods have emerged, including global positioning system (GPS), interferometric radar, and airborne laser scanner (ALS) or lidar. In conjunction with the conventional survey and photogrammetric method, they have found wide applications that demand varying levels of accuracy. In this paper, the principles of each method are briefly summarized. The discussion then concentrates on the accuracy level achievable with each method. The factors that affect the accuracy, wherever possible, are comprehensively evaluated. This review has re
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23

Pakshyn, Maksym, Ivan Lyaska, Kostyantyn Burak, et al. "ESTIMATION OF EARTH’S SURFACE MOVES AND DEFORMATION OF THE TERRITORY OF MINE “KHOTIN” OF KALUSH-GOLINSKYY FIELD BY METHOD OF RADAR INTERFEROMETRY." Geodesy and cartography 45, no. 5 (2019): 37–42. http://dx.doi.org/10.3846/gac.2019.6300.

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The article present processing techniques of radar data for calculating the deformations of the earth’s surface on the example of minefield, that is situated under the exogenous influence of underground workings of the “Khotin” minery Kalush-Golinskyy deposit. The estimation of accuracy of radar image processing methods, namely, the interferometry of the permanent radar scatterers and the interferometry of a series of small baseline lines, is made, by comparison with the results of processional geometric levelling with a short beam of deformation soil rappers of the profile lines of the mine f
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24

Kanashyn, Nikolay, Andrey Nikitchyn, and Dmytriy Afonyn. "Three-dimensional simulation application experience in reconstruction of bridges." Proceedings of Petersburg Transport University, no. 2 (June 20, 2017): 238–46. http://dx.doi.org/10.20295/1815-588x-2017-2-238-246.

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Objective: To state 3D modeling application experience in bridgeworks reconstruction by the example of Palace Bridge in Saint Petersburg. Methods: It was shown that one of the possible spheres of bridge 3D models application was the acquisition of spatial data of bridge constructions and components’ arrangement, as well as the analysis of main axis position with respect to each other. The technology of acquiring the initial data for modeling was given, the essence of which is in composite application of surface laser scanning, electronic tacheometer line and angle measurements, and measurement
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25

Calinescu, Tetyana, Ganna Likhonosova, and Olena Zelenko. "Financial implications of globalization and new technologies Ukraine international relations." SHS Web of Conferences 92 (2021): 09002. http://dx.doi.org/10.1051/shsconf/20219209002.

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Research background: The world will change radically after the COVID-2019 pandemic. The transformation of financial globalization is already taking place. It contributes to the emergence of new international relation’s forms, institutions, technologies of interaction. All these trends necessitate a revision of the basic Ukraine concepts on convergent integration into the international financial space. Purpose of the article: To identify effects of financial globalization in Ukraine and characteristics of digital human interaction; to define an expansion of digital health principles for the eli
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Marotta, Giuliano Sant’Anna, and Roberta Mary Vidotti. "DEVELOPMENT OF A LOCAL GEOID MODEL AT THE FEDERAL DISTRICT, BRAZIL, PATCH BY THE REMOVE-COMPUTE-RESTORE TECHNIQUE, FOLLOWING HELMERT'S CONDENSATION METHOD." Boletim de Ciências Geodésicas 23, no. 3 (2017): 520–38. http://dx.doi.org/10.1590/s1982-21702017000300035.

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Abstract: There are several techniques for determining geoid heights using ground gravity data, the geopotential models, the astro-geodetic components or a combination of them. Among the techniques used, the Remove-Compute-Restore (RCR) technique has been widely applied for the accurate determination of the geoid heights. This technique takes into account short, medium and long wavelength components derived from the elevation data obtained from Digital Terrain Models (DTM), ground gravity data and global geopotential models, respectively. This technique can be applied after adopting the proced
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27

Eshagh, Mehdi, and Jenny Berntsson. "On quality of NKG2015 geoid model over the Nordic countries." Journal of Geodetic Science 9, no. 1 (2019): 97–110. http://dx.doi.org/10.1515/jogs-2019-0010.

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Abstract The NKG2015 geoid model covers the Nordic and Baltic countries and has been computed based on the least-squares modification of Stokes’ formula with additive corrections method. New and precise terrestrial, airborne and shipborne gravimetric measurements, the recent global gravity model of the gravity field and steady-state ocean circulation explorer (GOCE) and detailed digital terrain models over each territory have been used for computing this new geoid model. Some estimates for the error of this model have been roughly presented by comparing it with the global navigation satellite
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28

Kromann, Thomas Hvid. "Værk, offentlighed, (net)arkiv. Transformationen af det litterære felt i medialiseringens tidsalder og hvordan vi sikrer det for eftertiden." Fund og Forskning i Det Kongelige Biblioteks Samlinger 56 (March 3, 2017): 244. http://dx.doi.org/10.7146/fof.v56i0.118934.

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Thomas Hvid Kromann: The literary work, the public sphere, (net)archive – transformation of the literary field in the mediatisation age and how we save it for posterity
 The article examines the ongoing transformation of the Danish literary field: what consequences does technological development in particular have for the concept of the literary work, the (literary) public sphere and for the possibilities for storing digital platforms that house both literary works, which are not associated with the printed media, and discussion forums on the internet? The author Caspar Eric’s publication
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29

Bitelli, Gabriele, Giorgia Gatta, Valentina Alena Girelli, Luca Vittuari, and Antonio Zanutta. "Integrated Methodologies for the 3D Survey and the Structural Monitoring of Industrial Archaeology: The Case of the Casalecchio di Reno Sluice, Italy." International Journal of Geophysics 2011 (2011): 1–8. http://dx.doi.org/10.1155/2011/874347.

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The paper presents an example of integrated surveying and monitoring activities for the control of an ancient structure, the Casalecchio di Reno sluice, located near Bologna, Italy. Several geomatic techniques were applied (classical topography, high-precision spirit levelling, terrestrial laser scanning, digital close-range photogrammetry, and thermal imagery). All these measurements were put together in a unique reference system and used in order to study the stability and the movements of the structure over the period of time observed. Moreover, the metrical investigations allowed the creat
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30

Yoshandi, Tengku Mohammad. "THE FUSION EFFECT OF COMPUTED RADIOGRAPHY IMAGE OF WELDING PLATE DIFFERENT IN POWER TO ITS IMAGE QUALITY." Journal of Renewable Energy and Mechanics 3, no. 02 (2020): 71–77. http://dx.doi.org/10.25299/rem.2020.vol3.no02.5225.

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Instrument testing which is done is indutries are one of method to maintain the primary condition of insrument with purpose to prevent damage on instrument which will cause accident of death. Testing conducted using non-destructive technique or NDT, which is one of testing which not leave any damage or harm to the test speciment. Non-destructive testing in industry is levelling up to digital display. This digital radiography using image plate instead of film. In this research, computed radiography invarious energy and curent is used. Voltage and current are factors that give effect to the resu
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31

Bamber, Jonathan L. "A digital elevation model of the Antarctic ice sheet derived from ERS-1 altimeter data and comparison with terrestrial measurements." Annals of Glaciology 20 (1994): 48–54. http://dx.doi.org/10.3189/1994aog20-1-48-54.

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The launch of ERS-1 provides coverage, by satellite altimetry, of 80% of the Antarctic ice sheet, allowing topographic mapping of areas which previously had a dearth of accurate elevation data. Four 35 d repeat cycles of fastdelivery altimeter data were used in this study, comprising a total of approximately 1000000 height estimates. About 40% of these were rejected during a careful filtering procedure designed to remove erroneous values caused by poor tracking or complete loss of the returned echo. The OSU-91A geopotential model was used to convert ellipsoidal elevations to geoidal values. Co
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Bamber, Jonathan L. "A digital elevation model of the Antarctic ice sheet derived from ERS-1 altimeter data and comparison with terrestrial measurements." Annals of Glaciology 20 (1994): 48–54. http://dx.doi.org/10.1017/s0260305500016220.

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The launch of ERS-1 provides coverage, by satellite altimetry, of 80% of the Antarctic ice sheet, allowing topographic mapping of areas which previously had a dearth of accurate elevation data. Four 35 d repeat cycles of fastdelivery altimeter data were used in this study, comprising a total of approximately 1000000 height estimates. About 40% of these were rejected during a careful filtering procedure designed to remove erroneous values caused by poor tracking or complete loss of the returned echo. The OSU-91A geopotential model was used to convert ellipsoidal elevations to geoidal values. Co
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33

Gulyanov, Yu A., A. A. Chibilyov, and A. A. Chibilyov Jr. "Reserves for the Increase of Yield and Quality of Winter Wheat Grain and Their Dependence on the Heterogeneity of Crops in the Conditions of the Steppe Zone of the Orenburg Urals, Russia." South of Russia: ecology, development 15, no. 1 (2020): 79–88. http://dx.doi.org/10.18470/1992-1098-2020-1-79-88.

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Aim. Verification of scientific concepts regarding the spatial heterogeneity of field agrocenoses. Identification of the variability of phytometric and structural crop ndicators and determination of the degree of their influence on the yield and quality of winter wheat grain in the steppe zone of the Orenburg Urals.Material and Methods. Establishment of field experiments, related observations and counts in accordance with the methodology of state variety crops testing and B.A.Dospekhov's guidelin. Monitoring of winter wheat crops was carried by measuring the vegetation index (NDVI) with a Gree
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34

Cabreira, Ariel G., Martín Tripode, and Adrián Madirolas. "Artificial neural networks for fish-species identification." ICES Journal of Marine Science 66, no. 6 (2009): 1119–29. http://dx.doi.org/10.1093/icesjms/fsp009.

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Abstract Cabreira, A. G., Tripode, M., and Madirolas, A. 2009. Artificial neural networks for fish-species identification. – ICES Journal of Marine Science, 66: 1119–1129. Acoustic fish detection is a valuable tool for the continuous monitoring of fish schools. However, changes in species composition or mixed multispecies situations still complicate the analysis of acoustic data. Validation of echo recordings is usually accomplished by trawling, but only at point locations. However, species proportions and size distributions in the catch can be biased because of gear selectivity and fish avoid
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35

Zhan, Chunyi, Shengshan Feng, Shuzhong Xie, Chunjing Liu, Yunhua Gao, and Jiahao Liang. "Anti-carburizing Coating for Resin Sand Casting of Low Carbon Steel Based on Composite Silicate Powder Containing Zirconium." MATEC Web of Conferences 142 (2018): 03007. http://dx.doi.org/10.1051/matecconf/201814203007.

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This paper studied the structure and properties of anticarburizing coating based on composite silicate powder containing zirconium by X-ray diffraction analyzer, thermal expansion tester, digital microscope and other equipment. It is introduced that the application example of the coating in the resin-sand casting of ZG1Cr18Ni9Ti stainless steel impeller. The anti-carburizing effect of the coating on the surface layer of the cast is studied by using direct reading spectrometer and spectrum analyzer. The change of the micro-structure of the coating after casting and cooling is observed by scanni
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Santillan, J. R., and M. Makinano-Santillan. "VERTICAL ACCURACY ASSESSMENT OF 30-M RESOLUTION ALOS, ASTER, AND SRTM GLOBAL DEMS OVER NORTHEASTERN MINDANAO, PHILIPPINES." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B4 (June 13, 2016): 149–56. http://dx.doi.org/10.5194/isprsarchives-xli-b4-149-2016.

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The ALOS World 3D – 30 m (AW3D30), ASTER Global DEM Version 2 (GDEM2), and SRTM-30 m are Digital Elevation Models (DEMs) that have been made available to the general public free of charge. An important feature of these DEMs is their unprecedented horizontal resolution of 30-m and almost global coverage. The very recent release of these DEMs, particularly AW3D30 and SRTM- 30 m, calls for opportunities for the conduct of localized assessment of the DEM’s quality and accuracy to verify their suitability for a wide range of applications in hydrology, geom
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37

Santillan, J. R., and M. Makinano-Santillan. "VERTICAL ACCURACY ASSESSMENT OF 30-M RESOLUTION ALOS, ASTER, AND SRTM GLOBAL DEMS OVER NORTHEASTERN MINDANAO, PHILIPPINES." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B4 (June 13, 2016): 149–56. http://dx.doi.org/10.5194/isprs-archives-xli-b4-149-2016.

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The ALOS World 3D – 30 m (AW3D30), ASTER Global DEM Version 2 (GDEM2), and SRTM-30 m are Digital Elevation Models (DEMs) that have been made available to the general public free of charge. An important feature of these DEMs is their unprecedented horizontal resolution of 30-m and almost global coverage. The very recent release of these DEMs, particularly AW3D30 and SRTM- 30 m, calls for opportunities for the conduct of localized assessment of the DEM’s quality and accuracy to verify their suitability for a wide range of applications in hydrology, geom
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38

Abdalla, Ahmed, та Robert Tenzer. "THE EVALUATION OF THE NEW ZEALAND'S GEOID MODEL USING THE KTH METHOD / NAUJOSIOS ZELANDIJOS GEOIDO MODELIO VERTINIMAS KTH METODU / ОЦЕНКА МОДЕЛИ ГЕОИДА НОВОЙ ЗЕЛАНДИИ С ПРИМЕНЕНИЕМ МЕТОДА КТН". Geodesy and Cartography 37, № 1 (2011): 5–14. http://dx.doi.org/10.3846/13921541.2011.558326.

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We compile a new geoid model at the computation area of New Zealand and its continental shelf using the method developed at the Royal Institute of Technology (KTH) in Stockholm. This method utilizes the least-squares modification of the Stokes integral for the biased, unbiased, and optimum stochastic solutions. The modified Bruns-Stokes integral combines the regional terrestrial gravity data with a global geopotential model (GGM). Four additive corrections are calculated and applied to the approximate geoid heights in order to obtain the gravimetric geoid. These four additive corrections accou
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Hubacek, M., V. Kovarik, and V. Kratochvil. "ANALYSIS OF INFLUENCE OF TERRAIN RELIEF ROUGHNESS ON DEM ACCURACY GENERATED FROM LIDAR IN THE CZECH REPUBLIC TERRITORY." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B4 (June 10, 2016): 25–30. http://dx.doi.org/10.5194/isprsarchives-xli-b4-25-2016.

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Digital elevation models are today a common part of geographic information systems and derived applications. The way of their creation is varied. It depends on the extent of area, required accuracy, delivery time, financial resources and technologies available. The first model covering the whole territory of the Czech Republic was created already in the early 1980's. Currently, the 5th DEM generation is being finished. Data collection for this model was realized using the airborne laser scanning which allowed creating the DEM of a new generation having the precision up to a decimetre. Model of
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Hubacek, M., V. Kovarik, and V. Kratochvil. "ANALYSIS OF INFLUENCE OF TERRAIN RELIEF ROUGHNESS ON DEM ACCURACY GENERATED FROM LIDAR IN THE CZECH REPUBLIC TERRITORY." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B4 (June 10, 2016): 25–30. http://dx.doi.org/10.5194/isprs-archives-xli-b4-25-2016.

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Digital elevation models are today a common part of geographic information systems and derived applications. The way of their creation is varied. It depends on the extent of area, required accuracy, delivery time, financial resources and technologies available. The first model covering the whole territory of the Czech Republic was created already in the early 1980's. Currently, the 5th DEM generation is being finished. Data collection for this model was realized using the airborne laser scanning which allowed creating the DEM of a new generation having the precision up to a decimetre. Model of
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41

Druzhynina, Viktoriia, Ganna Likhonosova, Galyna Lutsenko, and Galyna Lutsenko. "Innovative Technology in Terms of Socio-Economic Value Diffusion: Accounting and Analytical Support." European Journal of Sustainable Development 9, no. 3 (2020): 476. http://dx.doi.org/10.14207/ejsd.2020.v9n3p476.

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The potential of using information technology for socio-economic development of the country and the life quality of every citizen is quite significant now in Ukraine. The aim of the article is to study the modern possibilities of using information technologies, namely, adaptations of accounting and analytical support in the conditions of diffusion of socio-economic values to increase the welfare of the population. The methods of divergence and convergence, rationality and irrationality were used in the work - to search for effective tools for regulating national and international financial rel
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Zlinszky, A., and G. Timár. "Historic maps as a data source for socio-hydrology: a case study of the Lake Balaton wetland system, Hungary." Hydrology and Earth System Sciences 17, no. 11 (2013): 4589–606. http://dx.doi.org/10.5194/hess-17-4589-2013.

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Abstract. Socio-hydrology is the science of human influence on hydrology and the influence of the water cycle on human social systems. This newly emerging discipline inherently involves a historic perspective, often focusing on timescales of several centuries. While data on human history is typically available for this time frame, gathering information on the hydrological situation during such a period can prove difficult: measured hydrological data for such long periods are rare, while models and secondary data sets from geomorphology, pedology or archaeology are typically not accurate enough
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Zlinszky, A., and G. Timár. "Historic maps as a data source for socio-hydrology: a case study of the Lake Balaton wetland system, Hungary." Hydrology and Earth System Sciences Discussions 10, no. 6 (2013): 7733–81. http://dx.doi.org/10.5194/hessd-10-7733-2013.

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Abstract. Socio-hydrology is the science of human influence on the water cycle and the influence of the water cycle on human social systems. This newly emerging discipline inherently involves a historic perspective, often focusing on time scales of several centuries. While data on human history is typically available for this time frame, gathering information on the hydrological situation during such a period can prove difficult: measured hydrological data for such long periods are rare, while models and secondary datasets from geomorphology, pedology or archaeology are typically not accurate
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44

Jacobsen, K. "SYSTEMATIC GEOMETRIC IMAGE ERRORS OF VERY HIGH RESOLUTION OPTICAL SATELLITES." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-1 (September 26, 2018): 233–38. http://dx.doi.org/10.5194/isprs-archives-xlii-1-233-2018.

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<p><strong>Abstract.</strong> Very high resolution optical satellites are imaging the object space by a combination of CCD-lines in one direction and by time, speed and satellite rotation in the other direction. The combination of the CCD-lines usually is known by pre-calibration. Remaining errors of the pre-calibration, also slightly depending upon the satellite movement and rotation, with few exceptions are usually small up to negligible. This may not be the case for the image component in the scan direction and the alignment of the line combinations - they are controlled b
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45

Belyaev, Nikolay, Vasily Krupin, Evgeny Mikhalenko, Aleksandr Smirnov, Valentin Vilkevich, and Natalia Zagriadskaya. "Satellite Technologies in Monitoring of Ecosystems." Environment. Technology. Resources. Proceedings of the International Scientific and Practical Conference 2 (June 17, 2015): 60. http://dx.doi.org/10.17770/etr2015vol2.237.

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<p class="R-AbstractKeywords"><span lang="EN-US">The article provides a description of modern geodetic devices, which are used to solve several problems connected with environmental and hydraulic engineering. In particular, a non-conventional method of area measurement for ecosystems monitoring, which involves the usage of satellite navigation devices, is considered. </span></p><p class="TTPParagraphothers"><span lang="EN-US">Nowadays electronic tachymeters, digital levelling instruments, laser scanning systems and satellite systems are widely used for imple
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Jacobsen, K. "PROBLEMS AND LIMITATIONS OF SATELLITE IMAGE ORIENTATION FOR DETERMINATION OF HEIGHT MODELS." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-1/W1 (May 31, 2017): 257–64. http://dx.doi.org/10.5194/isprs-archives-xlii-1-w1-257-2017.

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The usual satellite image orientation is based on bias corrected rational polynomial coefficients (RPC). The RPC are describing the direct sensor orientation of the satellite images. The locations of the projection centres today are without problems, but an accuracy limit is caused by the attitudes. Very high resolution satellites today are very agile, able to change the pointed area over 200km within 10 to 11 seconds. The corresponding fast attitude acceleration of the satellite may cause a jitter which cannot be expressed by the third order RPC, even if it is recorded by the gyros. Only a co
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Rekus, Donatas, and Vilma Kriaučiūnaite-Neklejonoviene. "Peculiarities of digital levelling using automatic digital levels in civil engineering." Journal of Sustainable Architecture and Civil Engineering 18, no. 1 (2017). http://dx.doi.org/10.5755/j01.sace.18.1.17099.

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48

Barden, Owen. "Facebook levels the playing field: Dyslexic students learning through digital literacies." Research in Learning Technology 22 (February 14, 2014). http://dx.doi.org/10.3402/rlt.v22.18535.

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Dyslexia has an ambivalent relationship with learning technology. Any potential gains may be nullified if the technology is perceived to exacerbate stigma. This paper examines the use of an ‘everyday’ technology, Facebook, by a small group of sixth form students labelled as dyslexic. ‘Levelling the playing field’ is a phrase the participants used often when discussing what they wanted from learning technology. Because dyslexia usually is defined in terms of significant difficulties with literacy, we might reasonably anticipate that the participants would see Facebook as stigmatising rather tha
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Martinez Dy, Angela. "Levelling the playing field? Towards a critical-social perspective on digital entrepreneurship." Futures, July 2019, 102438. http://dx.doi.org/10.1016/j.futures.2019.102438.

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Essam Mohamed Al-Karargy and Gomaa Mohamed Dawod. "Optimum Combinations of GGM and GDEM Models for Precise National Geoid Modelling." Proceedings of Engineering and Technology Innovation, February 3, 2021. http://dx.doi.org/10.46604/peti.2021.6452.

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This study aims to develop a Local Geoid Model (LGM) for Egypt to determine the optimal combinations of global models with Global Navigation Satellite Systems (GNSS/Levelling) data. A precise national geodetic dataset, four Global Geopotential Models (GGMs), and three global Digital Elevation Models (DEMs) have been utilized. Hence, twelve gravimetric LGMs have been developed using the Least-Square Collocation (LSC) method fitted to GNSS/Levelling data and judged over 100 checkpoints. Results revealed that improvements in local geoid accuracy are attributed mainly to GGMs models representing t
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