Relevant bibliographies by topics / Spatial field

Academic literature on the topic 'Spatial field'

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Published: 4 June 2021
Last updated: 28 January 2023

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Journal articles on the topic "Spatial field"

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Kovaříček, P., and J. Hůla. "Field capacity determination from GPS spatial data." Research in Agricultural Engineering 49, No. 3 (February 8, 2012): 75–79. http://dx.doi.org/10.17221/4955-rae.

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For agricultural machinery management the actually reached machines capacity has a considerable importance. The data recorded by GPS monitoring enable to correct machines work productivity under concrete operational conditions. Assessment of machine aggregates operation records has proved effect of the operational factors onto operational efficiency reached on particular plots. The theoretical efficiency given by exploitation characteristics of machines has decreased effect of higher share of non-productive travels within small and irregular plots almost by 25%. In this paper we are dealing with searching for correlation between field speed and travelled unit path and defined classes of size, length and plot shape. The resulting knowledge of field efficiency on plots properties will enable to make more accurate the machines planned operation.
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Munandar, Aris, Enok Maryani, Dede Rohmat, and Mamat Ruhimat. "Assessment on Geography Field study at Universities in Indonesia." Jurnal SPATIAL Wahana Komunikasi dan Informasi Geografi 19, no. 1 (October 3, 2019): 1–10. http://dx.doi.org/10.21009/spatial.191.01.

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In Geography Study Program, fieldstudy is the hallmark of geography outdoor learning. The similar activities of fieldstudy are fieldwork, fieldtrip, outing, excursion, cooks tours and others. The implementation of fieldstudy in the universities of teacher training has the similarity in its naming, its definition, its purpose, material of the study, the duration of the activity, the location of the fieldstudy, and data processing. The difference of the fieldstudy implementation lies on the ratio of supervisor to students, funding, outcome product and assessment. Universities that conduct the fieldstudy should review the curriculum in its implementation so that the credit, the assessed product and process have the similarity both in the credit and the supervisors who assess.
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As'ari, Ruli, and Erni Mulyanie. "The Use of Local Landscape as a Field Laboratory for Geography of Education." Jurnal SPATIAL Wahana Komunikasi dan Informasi Geografi 19, no. 2 (December 31, 2019): 1–7. http://dx.doi.org/10.21009/spatial.192.1.

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Geographical skills that need to be shared by each geographer in general are map skills, field skills, and satellite image interpretation skills. To achieve field skills competency, a location is needed to be used as material for practicum studies for each subject. The Geography Education Field Laboratory can be studied in depth based on an analysis of the level of learning needs. The basis of the lab location requirements as a laboratory is seen from the laboratory function as an area to carry out careful and accurate testing and measurement of the phenomenon under study. The study was carried out through the identification of local landscapes by delineating the area through the utilization of satellite citera, and identifying potential from each area that was chosen descriptively. In this study, the Gunung Galunggung area can be used as a Physical Field Laboratory for Geography and Kampung Naga Education can be used as a Field Laboratory for Social and Cultural Geography.
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Koch, Erwan. "Spatial Risk Measures and Rate of Spatial Diversification." Risks 7, no. 2 (May 2, 2019): 52. http://dx.doi.org/10.3390/risks7020052.

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An accurate assessment of the risk of extreme environmental events is of great importance for populations, authorities and the banking/insurance/reinsurance industry. Koch (2017) introduced a notion of spatial risk measure and a corresponding set of axioms which are well suited to analyze the risk due to events having a spatial extent, precisely such as environmental phenomena. The axiom of asymptotic spatial homogeneity is of particular interest since it allows one to quantify the rate of spatial diversification when the region under consideration becomes large. In this paper, we first investigate the general concepts of spatial risk measures and corresponding axioms further and thoroughly explain the usefulness of this theory for both actuarial science and practice. Second, in the case of a general cost field, we give sufficient conditions such that spatial risk measures associated with expectation, variance, value-at-risk as well as expected shortfall and induced by this cost field satisfy the axioms of asymptotic spatial homogeneity of order 0, −2, −1 and −1, respectively. Last but not least, in the case where the cost field is a function of a max-stable random field, we provide conditions on both the function and the max-stable field ensuring the latter properties. Max-stable random fields are relevant when assessing the risk of extreme events since they appear as a natural extension of multivariate extreme-value theory to the level of random fields. Overall, this paper improves our understanding of spatial risk measures as well as of their properties with respect to the space variable and generalizes many results obtained in Koch (2017).
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Johnson, D. L. "SPATIAL AUTOCORRELATION, SPATIAL MODELING, AND IMPROVEMENTS IN GRASSHOPPER SURVEY METHODOLOGY." Canadian Entomologist 121, no. 7 (July 1989): 579–88. http://dx.doi.org/10.4039/ent121579-7.

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AbstractAnalysis of 10 years of grasshopper survey data (1978–1987) indicated that grasshopper populations in fields can be reliably predicted from roadside survey counts. Direct estimation of grasshopper densities in crop fields is no longer required for summaries of infestation levels or forecasts. Spatial autocorrelation was significant and positive for both roadside and field counts. The coefficient of variation of the field counts was greater than that of the roadside counts in each of the last 10 years. Population density was summarized by crop type and sampling method for the last 10 years. Linear regressions fitted to the 1978–1984 grasshopper survey data were used to estimate field population density from crop type and roadside counts in 1985–1987. Maps of population density were generated from the predicted and observed field counts with SPANS, a microcomputer-based geographic information system. Large coefficients of association (73–79%) between the predicted and observed maps attested to the sufficiency of road-side counts as the basis for production of population density maps.
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Si, Bing Cheng, and R. Gary Kachanoski. "Field-scale N fertilizer recommendations: The spatial covariance problem." Canadian Journal of Soil Science 82, no. 1 (February 1, 2002): 59–64. http://dx.doi.org/10.4141/s01-040.

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Theory is needed to estimate field-scale crop response and calibration relationships (soil test versus recommended fertilize r rate) from local scale measurements, in fields with spatially variable soil properties. The objective of this study is to present a theoretical stochastic framework for examining the influence of the spatial variability of soil properties, and covariance between soil properties, on field-scale crop response to fertilizer. An analytical solution of the general stochastic scaling equation is given for the specific case of wheat grain yield response to applied N fertilizer with variable soil-N test and available water in Saskatchewan, Canada. The analytical solution indicates spatial variance of soil properties within fields influences field average yield response to applied fertilizer. The field-scale maximum economic rate of fertilizer N (MERN), depends not only on the average soil properties, but also on (1) the amount of variability of soil properties in the field, and (2) the correlation between the spatial patterns of soil properties (e.g., soil test and available water). For the specific soil examined, positive spatial correlation between soil-N test and available water significantly increases MERN, for the same average soil test and available water. Negative correlation decreases MERN. Key Words: Fertilizer recommendation, soil test, spatial variability, crop response, soil water
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Borůvka, L., H. Donátová, and K. Němeček. "Spatial distribution and correlation of soil properties in a field: a case study." Plant, Soil and Environment 48, No. 10 (December 22, 2011): 425–32. http://dx.doi.org/10.17221/4391-pse.

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Analysis of spatial distribution and correlation of soil properties represents an important outset for precision agriculture. This paper presents an analysis of spatial distribution and mutual correlations, both classical and spatial, of soil properties in an agricultural field in Klučov. Clay and fine silt content, pH, organic carbon content (C<sub>org</sub>), moisture (Q), total porosity (Pt), capillary porosity (P<sub>c</sub>), and coefficients of aggregate vulnerability to fast wetting (K<sub>v1</sub>), to slow wetting and drying (K<sub>v2</sub>), and to mechanical impacts (K<sub>v3</sub>) were determined. Semivariogram ranges from 206 m (clay content) to 1120 m (K<sub>v3</sub>) were detected. Many relationships between soil properties were spatially based. Fine silt content and Corg&nbsp;proved to be the most important soil properties controlling all the three aggregate vulnerability coefficients, which was not clear for K<sub>v2</sub>&nbsp;from classical correlation only. Determined spatial correlations and similarities in spatial distribution may serve as groundwork in delineation of different zones for site-specific management.
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Gary, S. Peter, and Dan Winske. "Field/field spatial correlation function: Electromagnetic proton cyclotron instability." Journal of Geophysical Research: Space Physics 101, A2 (February 1, 1996): 2661–68. http://dx.doi.org/10.1029/95ja02988.

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Watson, Andrew B. "The Field of View, the Field of Resolution, and the Field of Contrast Sensitivity." Journal of Perceptual Imaging 1, no. 1 (January 1, 2018): 10505–1. http://dx.doi.org/10.2352/j.percept.imaging.2018.1.1.010505.

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Abstract The Field of View (FoV), the Field of Resolution, and the Field of Contrast Sensitivity describe three progressively more detailed descriptions of human spatial sensitivity at angles relative to fixation. The FoV is the range of visual angles that can be sensed by an eye. The Field of Resolution describes the highest spatial frequency that can be sensed at each angle. The Field of Contrast Sensitivity describes contrast sensitivity at each spatial frequency, at each visual angle. These three concepts can be unified with the aid of the Pyramid of Visibility, a simplified model of contrast sensitivity as a function of spatial frequency, temporal frequency, and luminance or retinal illuminance. This unified model provides simple yet powerful observations about the Field of Contrast Sensitivity. I have fit this model to a number of published measurements of peripheral contrast sensitivity. This allows us to test the validity of the model, and to estimate its parameters. Although the model is a simplification, I believe it provides an invaluable guide in a range of applications in visual technology.
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Donohoe, Aaron, and David S. Battisti. "The Amplitude Asymmetry between Synoptic Cyclones and Anticyclones: Implications for Filtering Methods in Feature Tracking." Monthly Weather Review 137, no. 11 (November 1, 2009): 3874–87. http://dx.doi.org/10.1175/2009mwr2837.1.

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Abstract The “background” state is commonly removed from synoptic fields by use of either a spatial or temporal filter prior to the application of feature tracking. Commonly used spatial and temporal filters applied to sea level pressure data admit substantially different information to be included in the synoptic fields. The spatial filter retains a time-mean field that has comparable magnitude to a typical synoptic perturbation. In contrast, the temporal filter removes the entire time-mean field. The inclusion of the time-mean spatially filtered field biases the feature tracking statistics toward large cyclone (anticyclone) magnitudes in the regions of climatological lows (highs). The resulting cyclone/anticyclone magnitude asymmetries in each region are found to be inconsistent with the unfiltered data fields and merely result from the spurious inclusion of the time-mean fields in the spatially filtered data. The temporally filtered fields do not suffer from the same problem and produce modest cyclone/anticyclone magnitude asymmetries that are consistent with the unfiltered data. This analysis suggests that the weather forecaster’s assertion that cyclones have larger amplitudes than anticyclones is due to a composite of a small magnitude asymmetry in the synoptic waves and a large contribution from inhomogeneity in the background (stationary) field.
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Dissertations / Theses on the topic "Spatial field"

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Haines, Ross. "Simultaneous reconstruction of spatial frequency fields and field sample locations." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:aa35073d-003b-4939-bf0e-8348243871b7.

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Classically, spatial smoothing methods such as kriging estimate smooth interpolating fields for features measured at well-located points. In this thesis, we make a simultaneous reconstruction of interpolating spatial fields and measurement locations. We give models, and sample-based Bayesian inference, for estimating locations of dialect samples on a map of England. The method exploits dialect-based spellings to locate these samples. The data are feature vectors extracted from written dialect samples. Just a fraction of the feature vectors ('anchors') have an associated spatial location. When coupled to a prior for the smoothly varying feature field, and the anchor texts, the unlocated feature vectors are jointly informative of their own location and the feature fields. The dataset is large, but sparse, since a given word has a large number of variant spellings which may appear in just a few documents. We report an analysis including Bayesian model fitting and validation on a large and representative subset of the data. The thesis has two main aims - to provide statistical tools for the linguists who collected the data, and to meet the computational and inferential challenge of simultaneously locating large numbers of feature vectors. The results presented in this thesis show that we have largely succeeded in meeting these challenges.
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Wealands, Stephen Russell. "Quantitative methods for hydrological spatial field comparison /." Connect to thesis, 2006. http://eprints.unimelb.edu.au/archive/00002722.

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Zuvela, Dominik. "Pretoria city : a spatial field in tension." Diss., University of Pretoria, 2010. http://hdl.handle.net/2263/30298.

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Architecture is a representation of our society’s aspirations and of our social, economic and political paradigms. Since 1994, has the city of Pretoria been successfully represented? Does the city succeed architecturally in creating space that is democratic and that embraces our country’s diversity? The large influx of people within the city of Pretoria has created a terrain consisting of a series of contradictions and conflicts. These conflicts and contradictions within the city are a result of social, economic, spatial, physical and historical tensions that exist within society's social, economic and political paradigms. Physical and spatial reactions have occurred as a result of these tensions that exist within the city of Pretoria. This dissertation will explore these urban spaces that are in tension and investigate what opportunities and limitations such spaces offer the city of Pretoria. The objective is to consider what architectural intervention will arise from the resolution, synthesis or conflict of these tensions. Can these spaces that are in tension within the city foster a new post-apartheid way of city-making.
Dissertation (MArch(Prof))--University of Pretoria, 2011.
Architecture
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Rydén, Magnus. "Strategic Placing of Field Hospitals Using Spatial Analysis." Thesis, KTH, Geoinformatik och Geodesi, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-34292.

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Humanitarian help organisations today may benefit on improving their location analysis when placing field hospitals in countries hit by a disasters or catastrophe. The main objective of this thesis is to develop and evaluate a spatial decision support method for strategic placing of field hospitals for two time perspectives, long term (months) and short term (weeks). Specifically, the possibility of combining existing infrastructure and satellite data is examined to derive a suitability map for placing field hospitals. Haut-Katanga in Congo is used as test area where exists a large variety of ground features and has been visited by aid organisations in the past due to epidemics and warzones. The method consists of several steps including remote sensing for estimation of population density, a Multi Criteria Evaluation (MCE) for analysis of suitability, and visualization in a webmap. The Population density is used as a parameter for an MCE operation to create a decision support map for locating field hospitals. Other related information such as road network, water source and landuse is also taken into consideration in MCE. The method can generate a thematic map that highlights the suitability value of different areas for field hospitals. By using webmap related technologies, these suitability maps are also dynamic and accessible through the Internet. This new approach using the technology of dasymetric mapping for population deprival together with an MCE process, yielded a method with the result being both a standalone population distribution and a suitability map for placing field hospitals with the population distribution taken into consideration. The use of dasymetric mapping accounted for higher resolution and the ability to derive new population distributions on demand due to changing conditions rather than using pre-existing methods with coarser resolution and a more seldom update rate. How this method can be used in other areas is also analysed. The result of the study shows that the created maps are reasonable and can be used to support the locating of field hospitals by narrowing down the available areas to be considered. The results from MCE are compared to a real field hospital scenario, and it is shown that the proposed method narrows down the localisation options and shortens the time required for planning an operation. The method is meant to be used together with other decision methods which involves non spatial factors that are beyond the scope of this thesis.
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Gyllingberg, Linnéa. "Mean field approximations of spatial models of evolution." Thesis, Uppsala universitet, Tillämpad matematik och statistik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-295782.

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Zhang, Mi. "Study of Spatial Structure of Squeezed Vacuum Field." W&M ScholarWorks, 2016. https://scholarworks.wm.edu/etd/1499450043.

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Squeezed states of light, with field fluctuations smaller than the coherent state fluctuations (or shot noise), are used for improving accuracy of quantum-noise limited measurements, like the detection of gravitational waves. They are also essential resources for quantum information transfer protocols. We studied a squeezed vacuum field generated in hot Rb vapor via the polarization self-rotation effect. We studied the mode structure of the squeezed field by spatially-masking the laser beam after its interaction with the Rb atomic vapor. From analysis of the data we developed a multi-mode theory to simulate the mode composition of the squeezed vacuum field. Our experiments showed that the amount of observed squeezing may be limited by the complex mode structure due to the excitement of higher order spatial modes during the nonlinear atom-light interaction. We demonstrated that optimization of the spatial profile of the beam led to higher detected squeezing. Our studies are useful for enhancing precision metrology and quantum memory applications.
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Haag, Christian. "Temporal and spatial wind field distribution in Delaware Bay." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file 9.11 Mb., 62 p, 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:1430767.

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Thesis (M.E.E.)--University of Delaware, 2006.
Principal faculty advisors: Kenneth E. Barner, Dept. of Electrical and Computer Engineering; and Mohsen Badiey, Dept. of Marine and Earth Studies. Includes bibliographical references.
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Rew, Lisa J. "Spatial and comparative aspects of arable field margin flora." Thesis, University of Reading, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.333656.

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MacKinnon, James L. "Spatial dynamics of cyclic field vole, Microtus agrestis, populations." Thesis, University of Aberdeen, 1998. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU483789.

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1. Many ecologists have recently advocated the study of spatial patterns of abundance or growth rates as a means of better understanding population dynamics. In this study I described the spatial pattern of abundance of the field vole, Microtus agrestis, which has previously been shown to have cyclic temporal fluctuations of abundance in my study area in Kielder Forest, northern England. A combination of techniques was then used to investigate which processes determine the spatial pattern of dynamics in these vole populations.2. Previous analysis of spatial patterns in density of field voles from an area of approximately 80 km2 within Kielder forest over a 13-year period indicate that density varies as a periodic travelling wave moving across the landscape. I collected data on vole density from a larger area (approximately 600 km2) over a 2.5-year period and used the same analysis to show that the spatio-temporal variation in density was well explained by a travelling wave of density moving across the entire region. Estimates of the wave's speed of 14 kmyr-1 and direction of 66° from north were consistent with the estimates obtained from the data set covering a smaller spatial extent but spanning a longer temporal scale.3. Processes that determine population abundance do so by acting on vital demographic rates. Spatial patterns in demographic rates were therefore described to help identify potential causes of the spatial patterns of density. Eight 0.3 ha live-trapping grids were established within the study area and animals were trapped at monthly intervals during a period of extended low density and during a period of increasing densities. Capture-mark-recapture techniques were used to estimate abundance, juvenile recruitment rate, apparent survival rate and immigration rate at these sampling sites. The synchrony of changes in these parameters between sites was measured as the cross-correlation coefficient between the time series of each parameter and the spatial patterns in the synchrony of each demographic rate were described using Mantel correlations. Field vole abundance, juvenile recruitment rate and a derived estimate of mortality rate were most synchronous between the closest sites, however no directionality was found in these patterns and they could not therefore be related to the travelling wave pattern of density. I concluded that the process responsible for the wave probably only acted during the period of declining density and that therefore the factors causing spatial patterns in abundance could differ at different stages of the population cycle.
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Zhou, Sichao. "Complex Optical Fields Generation Using a Vectorial Optical Field Generator." University of Dayton / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1461689435.

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Books on the topic "Spatial field"

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Levinson, Stephen C. Primer for the field investigation of spatial description and conception. Nijmegen: Max Planck Research Group for Cognitive Anthropology, 1991.

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Crouse, Chadd. Evaluation of the use of spatial modeling to improve county yield estimation. Washington, D.C: U.S. Dept. of Agriculture, National Agricultural Statistics Service, Research Division, 2000.

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Wells, Susan K. Temporal and spatial decorrelation scales of the Yellow Sea thermal field[s]. Monterey, Calif: Naval Postgraduate School, 1994.

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Hashim, Abdelaziz Abdelfattah. The marketing system for sorghum and other major crops in the Sudan: A spatial and temporal equilibrium analysis. Kiel: Wissenschaftsverlag Vauk, 1994.

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Voorhies, Coerte V. Elementary theoretical forms for the spatial power spectrum of Earth's crustal magnetic field. Greenbelt, Md: National Aeronautics and Space Administration, Goddard Space Flight Center, 1998.

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Andrén, Olof. Spatial variation of soil physical and chemical properties in an arable field with high clay content. Uppsala: Sveriges lantbruksuniversitet, Institutionen för ekologi och miljövård, 1990.

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Saleeb, Atef F. Defect localization capabilities of a global detection scheme: Spatial pattern recognition using full-field vibration test data in plates. [Cleveland, Ohio]: National Aeronautics and Space Administration, Glenn Research Center, 2002.

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Lakshminarayana, B. The three dimensional flow field at the exit of an axial-flow turbine rotor. [Cleveland, Ohio]: National Aeronautics and Space Administration, Lewis Research Center, 1998.

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Lakshminarayana, B. The three dimensional flow field at the exit of an axial-flow turbine rotor. [Cleveland, Ohio]: National Aeronautics and Space Administration, Lewis Research Center, 1998.

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Leighton, David A. Spatial distribution of selenium and other inorganic constituents in ground water underlying a drained agricultural field, western San Joaquin Valley, California. Sacramento, Calif: U.S. Geological Survey, 1992.

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Book chapters on the topic "Spatial field"

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Li, Deren, Shuliang Wang, and Deyi Li. "Data Field." In Spatial Data Mining, 175–85. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-48538-5_6.

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Shekhar, Shashi, and Hui Xiong. "Phenomenon Spatial Field." In Encyclopedia of GIS, 855. Boston, MA: Springer US, 2008. http://dx.doi.org/10.1007/978-0-387-35973-1_977.

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Xie, Bosun. "Sound field, spatial hearing, and sound reproduction." In Spatial Sound, 1–70. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003081500-1.

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Xie, Bosun. "Spatial sound reproduction by wave field synthesis." In Spatial Sound, 439–96. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003081500-10.

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Goodchild, Michael F. "Field-Based Spatial Modeling." In Encyclopedia of Database Systems, 1–7. New York, NY: Springer New York, 2016. http://dx.doi.org/10.1007/978-1-4899-7993-3_163-2.

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Goodchild, Michael F. "Field-Based Spatial Modeling." In Encyclopedia of Database Systems, 1132–38. Boston, MA: Springer US, 2009. http://dx.doi.org/10.1007/978-0-387-39940-9_163.

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Goodchild, Michael F. "Field-Based Spatial Modeling." In Encyclopedia of Database Systems, 1476–82. New York, NY: Springer New York, 2018. http://dx.doi.org/10.1007/978-1-4614-8265-9_163.

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Xie, Bosun. "Physical analysis of multichannel sound field recording and reconstruction." In Spatial Sound, 349–437. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003081500-9.

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Cheng, Tony. "On the Very Idea of a Tactile Field, or." In Spatial Senses, 226–47. 1 [edition]. | New York : Taylor & Francis, 2019. | Series: Routledge studies in contemporary philosophy ; 122: Routledge, 2019. http://dx.doi.org/10.4324/9781315146935-13.

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van Lieshout, M. N. M. "Random field modelling and interpolation." In Theory of Spatial Statistics, 9–43. Boca Raton, Florida : CRC Press, 2019.: Chapman and Hall/CRC, 2019. http://dx.doi.org/10.1201/9780429052866-2.

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Conference papers on the topic "Spatial field"

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Lindle, J. R., F. J. Bartoli, S. R. Flom, B. R. Ratna, and R. Shashidhar. "Field-Dependent Birefringence of an Electroclinic Liquid Crystal." In Spatial Light Modulators. Washington, D.C.: Optica Publishing Group, 1997. http://dx.doi.org/10.1364/slmo.1997.swb.3.

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The growing need for spatial light modulators with grey-scale capability and a fast response has stimulated interest in the development of new electroclinic liquid crystals with large tilt angles. The achievable contrast ratio in these devices is limited by the magnitude of the tilt angle as well as by a field-induced deformation of the smectic layers which degrades the extinction. Recently, it was shown that field-induced changes in the birefringence can also contribute significantly to the electrooptic response.1 In this paper, optical phase retardation measurements are performed to investigate the field dependence of the birefringence and the contrast ratio for a new electroclinic liquid crystal, designated a DSiKN65, which has recently been synthesized and which exhibits both a large electroclinic tilt angle (>22.5°) and a fast response (<100μs).1 The first observation of a large field-dependent optical biaxiality in this material is reported. The implications on these results on device performance will be discussed.
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Lee, Inhye, and Hyomin Kim. "Spatial Magnetic Field Visualization." In MM '17: ACM Multimedia Conference. New York, NY, USA: ACM, 2017. http://dx.doi.org/10.1145/3123266.3129328.

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Schröder, York, and Mikko Laine. "Spatial string tension revisited." In XXIIIrd International Symposium on Lattice Field Theory. Trieste, Italy: Sissa Medialab, 2005. http://dx.doi.org/10.22323/1.020.0180.

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Chen, Zhu-an, Li-ting Zhang, and Lu Liu. "Building MapObjects attribute field in cadastral database based on the method of Jackson system development." In International Symposium on Spatial Analysis, Spatial-temporal Data Modeling, and Data Mining, edited by Yaolin Liu and Xinming Tang. SPIE, 2009. http://dx.doi.org/10.1117/12.837701.

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VAGUET, YVETTE, and L. PISAREVA. "SPATIAL IMBALANCE OF MODERN SOCIETIES." In Communication Field of a Modern Metropolis: Program Dialogue. LLC MAKS Press, 2019. http://dx.doi.org/10.29003/m104.978-5-317-06114-2/10-17.

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Rhudy, Matthew B. "Stochastic Spatial Wind Field Simulation using a Potential Field." In AIAA Modeling and Simulation Technologies Conference. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2014. http://dx.doi.org/10.2514/6.2014-2350.

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Canoglu, Ergun, Elsa Garmire, I. Lahiri, D. D. Nolte, and M. R. Melloch. "Pre-illumination to Control The Active Trap Density in a Semi-Insulating MQW Device." In Spatial Light Modulators. Washington, D.C.: Optica Publishing Group, 1997. http://dx.doi.org/10.1364/slmo.1997.smc.4.

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Semiconductor photorefractive quantum well devices are prime candidates for high speed real-time image processing applications because of their high speed, small thickness and large electro-optic nonlinearities1,2,3. When used in the Stark geometry, where a field is applied perpendicular to MQW layers, the optical nonlinearity arises from longitudinal field screening in the illuminated areas. Lateral spatial modulation of the field screening is translated to lateral spatial modulation of refractive index and absorption by the quantum confined Stark effect. Device performance is characterized by spatial resolution and sensitivity, both of which strongly depend on carrier transport. The spatial resolution decreases with increased lateral carrier transport4,5, while the sensitivity increases with increased longitudinal transport. Highly trapping materials have been successfully used to increase the device resolution down to 5-7 μm6,7.
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Green, Jeremy, Michael Engelhardt, John Negele, and Patrick Varilly. "Spatial diquark correlations in a hadron." In The XXVIII International Symposium on Lattice Field Theory. Trieste, Italy: Sissa Medialab, 2011. http://dx.doi.org/10.22323/1.105.0140.

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Munoz-Lopez, J., G. Martínez Niconoff, G. Diaz-Gonzalez, J. Silva Barranco, and P. Martínez Vara. "Spatial attributes of the diffraction field." In SPIE Optical Engineering + Applications, edited by Khan M. Iftekharuddin, Abdul A. S. Awwal, and Andrés Márquez. SPIE, 2013. http://dx.doi.org/10.1117/12.2024337.

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Sokolov, Andrey L. "Spatial polarization of the electromagnetic field." In Lasers for Measurements and Information Transfer 2002, edited by Vadim E. Privalov. SPIE, 2003. http://dx.doi.org/10.1117/12.501366.

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Reports on the topic "Spatial field"

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Hallen, Hans D. Spatial & Temporal Resolution in Near-Field Optical Microscopy. Fort Belvoir, VA: Defense Technical Information Center, September 1998. http://dx.doi.org/10.21236/ada358134.

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Shinn-Cunningham, Barbara G., and Douglas Brungart. Near-Field and Distance Cues in Auditory Spatial Displays. Fort Belvoir, VA: Defense Technical Information Center, February 2001. http://dx.doi.org/10.21236/ada387554.

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Jury, William, and David Russo. Characterization of Solute Transport in Spatial-Variable Unsaturated Field Soils. United States Department of Agriculture, September 1992. http://dx.doi.org/10.32747/1992.7603814.bard.

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Manson, J. L., J. A. Villa, John Singleton, J. Brambleby, and P. A. Goddard. Determining single-ion and spatial exchange anisotropies by pulsed-field magnetometry. Office of Scientific and Technical Information (OSTI), February 2017. http://dx.doi.org/10.2172/1343726.

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Crawford, Timothy L., and Gennaro H. Crescenti. Spatial Variation of Wind Stress and Wave Field in the Shoaling Zone. Fort Belvoir, VA: Defense Technical Information Center, September 2000. http://dx.doi.org/10.21236/ada610178.

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Crawford, Timothy L., and Gennaro H. Crescenti. Spatial Variation of Wind Stress and Wave Field in the Shoaling Zone. Fort Belvoir, VA: Defense Technical Information Center, August 2001. http://dx.doi.org/10.21236/ada627971.

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Crawford, Timothy L. Spatial Variation of Waves, Stress and Wind Field in the Shoaling Zone. Fort Belvoir, VA: Defense Technical Information Center, September 1997. http://dx.doi.org/10.21236/ada633472.

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Penrod, Clark S., and David E. Grant. Spatial and Temporal Properties of the Noise Field Observed in TAGEX 87. Fort Belvoir, VA: Defense Technical Information Center, November 1990. http://dx.doi.org/10.21236/ada242730.

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Wetherell, K., B. Edwards, and K. Simpson. Preliminary results of field mapping, petrography, and GIS spatial analysis of the West Tuya lava field, northwestern British Columbia. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2005. http://dx.doi.org/10.4095/221033.

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Zhang, Renduo, and David Russo. Scale-dependency and spatial variability of soil hydraulic properties. United States Department of Agriculture, November 2004. http://dx.doi.org/10.32747/2004.7587220.bard.

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Water resources assessment and protection requires quantitative descriptions of field-scale water flow and contaminant transport through the subsurface, which, in turn, require reliable information about soil hydraulic properties. However, much is still unknown concerning hydraulic properties and flow behavior in heterogeneous soils. Especially, relationships of hydraulic properties changing with measured scales are poorly understood. Soil hydraulic properties are usually measured at a small scale and used for quantifying flow and transport in large scales, which causes misleading results. Therefore, determination of scale-dependent and spatial variability of soil hydraulic properties provides the essential information for quantifying water flow and chemical transport through the subsurface, which are the key processes for detection of potential agricultural/industrial contaminants, reduction of agricultural chemical movement, improvement of soil and water quality, and increase of agricultural productivity. The original research objectives of this project were: 1. to measure soil hydraulic properties at different locations and different scales at large fields; 2. to develop scale-dependent relationships of soil hydraulic properties; and 3. to determine spatial variability and heterogeneity of soil hydraulic properties as a function of measurement scales. The US investigators conducted field and lab experiments to measure soil hydraulic properties at different locations and different scales. Based on the field and lab experiments, a well-structured database of soil physical and hydraulic properties was developed. The database was used to study scale-dependency, spatial variability, and heterogeneity of soil hydraulic properties. An improved method was developed for calculating hydraulic properties based on infiltration data from the disc infiltrometer. Compared with the other methods, the proposed method provided more accurate and stable estimations of the hydraulic conductivity and macroscopic capillary length, using infiltration data collected atshort experiment periods. We also developed scale-dependent relationships of soil hydraulic properties using the fractal and geostatistical characterization. The research effort of the Israeli research team concentrates on tasks along the second objective. The main accomplishment of this effort is that we succeed to derive first-order, upscaled (block effective) conductivity tensor, K'ᵢⱼ, and time-dependent dispersion tensor, D'ᵢⱼ, i,j=1,2,3, for steady-state flow in three-dimensional, partially saturated, heterogeneous formations, for length-scales comparable with those of the formation heterogeneity. Numerical simulations designed to test the applicability of the upscaling methodology to more general situations involving complex, transient flow regimes originating from periodic rain/irrigation events and water uptake by plant roots suggested that even in this complicated case, the upscaling methodology essentially compensated for the loss of sub-grid-scale variations of the velocity field caused by coarse discretization of the flow domain. These results have significant implications with respect to the development of field-scale solute transport models capable of simulating complex real-world scenarios in the subsurface, and, in turn, are essential for the assessment of the threat posed by contamination from agricultural and/or industrial sources.
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