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Academic literature on the topic 'Northern Mathematical models'

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Published: 10 December 2022
Last updated: 29 January 2023

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Journal articles on the topic "Northern Mathematical models"

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Dambacher, Jeffrey M., Peter C. Rothlisberg, and Neil R. Loneragan. "Qualitative mathematical models to support ecosystem-based management of Australia's Northern Prawn Fishery." Ecological Applications 25, no. 1 (January 2015): 278–98. http://dx.doi.org/10.1890/13-2030.1.

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Nikonorov, Valentin, Andrei Kutuzov, Viktor Nikonorov, Irina Bagaeva, and Anna Letta. "Dewaxing models digitalization in the mathematical model of winter diesel fuel production." E3S Web of Conferences 258 (2021): 11004. http://dx.doi.org/10.1051/e3sconf/202125811004.

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The climatic features of Russia, as well as the need for the development of the Arctic and the Great Northern Sea Route, require an increase in the production of winter diesel fuel. The object of the study is obtaining winter diesel fuel. The subject of the study is digitalizing oil-refining processes by building the mathematical model of winter diesel fuel production for the case of combining dewaxing regimes taking into account the logistical aspect. Main research methods: retrospective data analysis, synthesis, comparison, optimization theory methods. A literary review was carried out, the main methods for improving the low-temperature properties of winter diesel fuel were revealed. Study hypothesis: a combination of dewaxing regimes will increase the yield of denormalizate and, accordingly, winter diesel fuel. The authors for each mode of dewaxing compiled a mathematical model. Then, the authors constructed a mathematical model of obtaining winter diesel fuel for a combination of dewaxing regimes and taking into account the logistical aspect. The obtained mathematical model can be used to obtain the required amount of winter diesel fuel with compliance with quality requirements and taking into account the logistical aspect.
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Gomes, Francileni Pompeu, Osvaldo Resende, Elisabete Piancó de Sousa, Juliana Aparecida Célia, and Kênia Borges de Oliveira. "Application of Mathematical Models and Thermodynamic Properties in the Drying of Jambu Leaves." Agriculture 12, no. 8 (August 18, 2022): 1252. http://dx.doi.org/10.3390/agriculture12081252.

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Jambu is a vegetable originally from the northern region of Brazil, has bioactive properties, being little explored by other regions, due to its high peresivity. And one of the methods to increase the shelf life of plant products is the removal of water. The objective of this work was to evaluate the drying kinetics of jambu leaf mass. Two treatments were carried out: The mass of fresh jambu leaves and the mass of fresh jambu leaves with the addition of drying foam, both submitted in an oven with forced air circulation at temperatures (50, 60 and 70 °C and thickness of 1.0 cm). The proximate composition of the materials was performed before and after drying. Twelve mathematical models were tested on drying kinetics data and thermodynamic properties were calculated. The parameters of the proximate composition for the mass of leaves and foam after drying were: Moisture content of (2 to 7%), ash content of (13 to 17%), protein content of (22 to 30%), lipids of (0.6 to 4%) and total titratable acidity (0.20 to 0.28%) of tartaric acid. The models that best fit the experimental data to describe the drying kinetics of jambu masses were: Wang & Singh. The use of foam mat presented higher values of effective diffusion coefficient and activation energy and lower values of enthalpy and entropy, reducing the drying time.
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Abeuov, S. K., O. D. Shoykin, and V. A. Kamkin. "Mathematical models for predicting the level of potatoes nutrition from the soil chemical composition in the Northern Kazakhstan conditions." IOP Conference Series: Earth and Environmental Science 954, no. 1 (January 1, 2022): 012003. http://dx.doi.org/10.1088/1755-1315/954/1/012003.

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Abstract The authors of the article presented a visual technique for programming the yield of potato tubers by using mathematical models of the relationship with the chemical composition of the soil. The content of N-NO3 and P2O5 varied in the range of 14.7-35.0 mg/kg and 37.1-39.0 mg/kg of soil. The increase in the content of these nutrients was accompanied by an increase in the productivity of potato tubers from 1 ha. The results of the study showed that the yield value is closely related to the content of N-NO3 and P2O5 in the soil in the initial phase of crop growth. The verification of the calculation methods showed a forecast error by comparing the actual yield data with the predicted results. The established quantitative indicators with the help of mathematical communication models make it possible to diagnose the value of potato yield and normalize the effect of fertilizers.
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Vassiliadis, Chris, and John Mylonakis. "PLANNING A PRODUCT FOR TOURING DESTINATIONS THROUGH THE USE OF SPATIAL MATHEMATICAL ANALYSIS." Tourism and hospitality management 12, no. 2 (December 2006): 71–82. http://dx.doi.org/10.20867/thm.12.2.6.

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Mathematical models provide spatial analysis to help complex decision-making and can be successfully applied to product planning in tourism. This paper presents a case study, and suggests one process by which planning agencies may evaluate the railway stations in the Northern Greece network. Six geographical points of distinction are identified for promotion based on linear-nearest neighbor analysis and the connectivity index. A functional diagram evaluates each point based on infrastructure, natural and cultural attractions. Finally, these indicators suggest marketing considerations, which may lend support to Management or stakeholders’ discussions to maximize the geographic points.
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Sazonov, A. A., I. N. Krylenko, A. N. Amerbaev, E. V. Zavyalova, N. K. Semenova, L. S. Odoev, and N. L. Frolova. "Application of the synthesis of mathematical models to study the characteristics of flooding of the Northern Dvina River." IOP Conference Series: Earth and Environmental Science 263 (May 13, 2019): 012016. http://dx.doi.org/10.1088/1755-1315/263/1/012016.

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Klein, Michael J. "Predicting Prehistoric Settlement in the Northern Neck of Virginia: The Richmond County Assessment Survey Methodology." North American Archaeologist 16, no. 4 (April 1996): 317–42. http://dx.doi.org/10.2190/u1gf-5c2l-xq8f-q8bc.

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Cultural Resource Management studies have identified a variety of site types and locations and generated data suited to statistical and predictive analysis. Unfortunately, predictive models often include unwarranted assumptions about the structure of the environment and the mathematical distribution of the data. Statistical and graphic approaches drawn from Exploratory Data Analysis, combined with sampling of the environment, promote evaluation of the potential of environmental variables for predicting site locations. Analysis of data from the Richmond County Archaeological Assessment illustrates these points.
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Ferguson, N. M., C. A. Donnelly, M. E. J. Woolhouse, and R. M. Anderson. "The epidemiology of BSE in cattle herds in Great Britain. II. Model construction and analysis of transmission dynamics." Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences 352, no. 1355 (July 29, 1997): 803–38. http://dx.doi.org/10.1098/rstb.1997.0063.

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Mathematical models that describe the key processes determining the pattern of the bovine spongiform encephalopathy (BSE) epidemic in British cattle are derived that allow for infection from feed as well as maternal and direct horizontal transmission. Heterogeneous susceptibility classes are also incorporated into the analysis. Maximum likelihood methods are used to estimate parameters and to obtain confidence intervals from available experimental and epidemiological data. A comprehensive sensitivity analysis of all model parameters and distributional assumptions is presented. Additional validation is provided by fitting the model to independent data collected in Northern Ireland. Model estimates and predictions based on BSE case data for Great Britain and Northern Ireland, together with their implications, are reviewed, and future research priorities discussed.
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Sytnyk, S. A. "PHYTOTOMASS OF ROBINIA PSEUDOACACIA L. TRUNK COMPONENTS IN THE PLANTED BLACK LOCUST STANDS WITHIN NORTHERN STEPPE ZONE OF UKRAINE." Forestry and Forest Melioration, no. 132 (February 5, 2018): 141–47. http://dx.doi.org/10.33220/1026-3365.132.2018.141.

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The results of simulation of the above-ground phytomass of the components of Black locust tree trunks in the planted stands within the Northern Steppe zone of Ukraine are presented. Correlation and statistical analyses of the data set from model trees were carried out. A reliable strong correlation between the formation of the trunk timber volume and the volume of the trunk in the bark and the values of the diameter of the trunk and the height of the trees were established. The mathematical dependences for estimating the volume of the black locust trunk fractions, namely, the volume of the trunk timber, the volume of the trunk bark and the volume of the trunk in the bark, were developed as two- and three-factor mathematical models. The graphical interpretation of changes in the trunk volume in the bark of trees at the constant height was presented under the developed mathematical model. The results of the development of normative support for evaluation of components of the trunk phytomass in freshly cut and absolutely dry conditions were given.
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Kroepsch, Adrianne C. "Groundwater Modeling and Governance: Contesting and Building (Sub)Surface Worlds in Colorado’s Northern San Juan Basin." Engaging Science, Technology, and Society 4 (March 1, 2018): 43. http://dx.doi.org/10.17351/ests2018.208.

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As groundwater use has surged globally and computing power has grown, groundwater modeling has become a regular feature of subsurface-oriented governance. Our improved ability to “see” underground with models has not, however, generated epistemic consensus on the inner workings of subsurface systems. Here, I ask how and why that is the case. I pursue this line of inquiry in the context of groundwater governance in the American West. Specifically, I trace a decade of groundwater modeling at the heart of a protracted and legally influential groundwater dispute in the state of Colorado to show how models served as mathematical spaces for competing subsurface stakeholders to test and contest opposing visions of groundwater flows, rights, and responsibilities. Drawing from the Science & Technology Studies literature on global climate modeling, I argue that groundwater models are more than simulations of subsurface systems; they are tools of “world building” that embed, enact, and also circumscribe subsurface politics.
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Dissertations / Theses on the topic "Northern Mathematical models"

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Duff, Andrew A. "Predicting bat occurrence in northern California using landscape-scale variables." Virtual Press, 2004. http://liblink.bsu.edu/uhtbin/catkey/1286503.

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Predicting species occurrence based upon landscape-scale characteristics is a fundamental goal of ecology and conservation biology. Accurately predicting the potential occurrence of a species is fundamental to management activities that involve large areas where sampling is difficult due to logistical or financial constraints. During the summers of 2001-2003 mist nets were used to capture bats in Whiskeytown National Recreation Area (WNRA), Lassen Volcanic National Park (LVNP), and Lassen National Forest (LNF) in northern California. I used logistic regression and Akaike's Information Criterion (AIQ to model species distributions. Models developed a priori were used to determine which variables best discriminated between capture sites and non-capture sites. Prediction models were mapped using Geographic Information Systems. In WNRA, for all bat species combined total edge was most parsimonious, whereas in LVNP elevation was best for all species. Elevation and tree size were important in predicting the occurrence of pallid bats (Antrozous pallidus), in LNF. Results of this study are important to wildlife managers within the study areas because the models can be used to minimize deleterious impacts on bats. Moreover, distribution maps are valuable to bat conservation efforts because they provide baseline data important for evaluating and predicting population responses to management activities.
Department of Biology
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Johnson, Terrence G. "A model of nitrate leaching from agricultural systems in the northern neck of Virginia." Diss., Virginia Tech, 1992. http://hdl.handle.net/10919/37887.

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A model (VTCROPS) was developed to simulate the long-term effects of nitrogen (N) leaching to groundwater in the Northern Neck region of Virginia, and ultimately to the Chesapeake Bay. VTCROPS simulates N fate and transport in a soil-plant-atmosphere continuum in a vertical slice between two crop rows, enabling consideration of nonuniform fertilizer placement and root growth patterns. VTCROPS models atmospheric, soil and crop subsystems. Atmospheric conditions (rainfall, temperature, solar radiation) may be directly input by the user or generated using a stochastic climatic generator. The soil subsystem simulates runoff, infiltration, drainage and soil-water redistribution, N immobilization, nitrification, mineralization, denitrification and advective N transport. The crop subsystem simulates plant N uptake, and vegetative and reproductive growth in response to soil and climatic factors, explicitly for maize or wheat. VTCROPS simulates soybean in a crop rotation empirically accounting for leaf area and root growth. The model is capable of simulating long-term cropping sequences under minimum and conventional tillage practices for continuous maize or for rotations involving maize, wheat, soybean and fallow. Critical internal model parameters were calibrated through comparison of output to field data. The sensitivity of output to input variables was determined. Model output is most sensitive to the climatic variables. Model predicted crop performance variables — grain and total dry matter yields and N content — and soil N content were compared with available field data from two sites over a three year period for maize. Data from six sites over a one year period were tested for wheat. Predictions for maize and total N content were fairly accurate, with a tendency to greater error in dry years. Predictions for wheat were somewhat less accurate, but incomplete field data precluded determining the source of discrepancies. Long-term model predictions, for two year crop rotations with minimum and conventional tillage, were evaluated by comparing performance variables with literature values. Appropriate responses were obtained for N transformation processes. Mass conservation for soil-water and N were good. Maize performance variables were within the range of literature values, and were higher under minimum till. Wheat yields and N contents were somewhat higher than values reported in the literature. Nitrogen load is correlated to drainage and water use over the short run, and to rainfall and drainage over longer periods. Minimum tillage did not increase N load to groundwater. Over a year nitrogen load was strongly periodic, with most leaching taking place from January through April. More than 50% of the N load over a rotation was lost during an extended fallow period that followed soybeans. Nitrogen load increased with fertilizer rates, however, N leaching fraction was optimal around rates of 150 — 200 kg/ha. The model was applied to the Virginia counties of Richmond, Westmoreland, Lancaster, King George and Northumberland to assess the potential for long term N leaching to groundwater. Soil surveys indicated that 34 soil map units occurred within 123,000 hectares of cultivated land. In order to reduce the number of simulations, principal component analysis and cluster analysis were employed to subdivide the cultivated area into 10 land units based on different soil properties. Historical climatic data from the area was used to calibrate the stochastic climatic generator. Analyses were performed to determine long-term crop performance and N loads to ground and surface waters in the study area over a 26 year period (13 rotations). Two management systems were applied to the land units. The first management system consisted of a rotation of minimum tilled maize, conventionally tilled wheat, minimum tilled soybeans and a fallow period. The second management system had a similar cropping sequence, but all crops were conventionally tilled. In both cases, fertilizer was applied at a rate of 150 kg-N/ha/crop. With the exception of two land units, mean yield, water use and N uptake over the simulation was fairly uniform among the land units. Runoff and drainage were highly variable between land units and over time within units. Mineralization, denitrification and N load were highly variable both between land units and over time. Nitrogen load ranged from 66 to 131 kg/ha/rotation between land units. Long-term average N loads and N concentrations from the cultivated area and from the total area of the study region were estimated. For this analysis it was assumed that 80% of the cultivated area was under minimum till and 20% under conventional tillage. An area-weighted average of 5.4 million kg-N/ha/year or 29% of total N applied is discharged to groundwater with an average drainage concentration of 9.9 mg/L. The average N concentration from the study area (including uncultivated areas) to groundwater is estimated at 5.1 mg/L. Average N concentration to the Chesapeake Bay from all sources, after dilution with runoff is 4.5 mg/L which is lower than the drinking water standard for nitrate N of 10 mg/L. The possibility of using sewage sludge as a replacement for, or in consort with N fertilizer was investigated for a typical land unit, under a conventionally tilled maize-wheat- soybean-fallow rotation. Simulations were conducted with 100%, 50% and 0% sludge (C—N ratio of 12). With fertilizer N augmenting the sludge, the total N input (250 kg/ha) was the same for each treatment. Mean yields were similar for 50% and zero sludge, but lowered by 10% and 16%, respectively, for maize and wheat with 100% sludge. Discrepancies in yields were attributed to the fact that mineralization rates of sludge are not high enough to supply the crop N requirement during periods of peak uptake. Nitrate leaching was reduced by 41 and 25% with 100 and 50% sludge applications, respectively.
Ph. D.
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Huang, Fengting. "A simple polynya model for the north water, northern Baffin Bay /." Thesis, McGill University, 1990. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=59872.

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A simple linear reduced-gravity ocean model is developed to simulate the North Water polynya located in northern Baffin Bay. The model is an extension of Pease (1987) latent-heat model for a coastal polynya. Both northerly surface wind forcing and coastal upwelling processes are taken into account in modelling the steady state and time-dependent water velocities, upper layer depth, and polynya width measured southward from its northern boundary. Also, both uniform and variable wind forcing are considered. In most of this thesis a semi-infinite domain model is used in which upwelling occurs along the eastern boundary (the Greenland coast). It is found that the steady state polynya width is a strong function of the air temperature, but a weak function of the wind speed. The model results show that in the upwelling region near the Greenland coast, the polynya width is larger than further offshore (distance $>$ 2 Rossby radii), where it is a constant (the limiting Pease width). For a variable wind forcing, the southern ice edge of the North Water has a form that is similar to that of the wind forcing. In a channel, upwelling occurs in the eastern part and downwelling in the western part. Thus the polynya is much wider near Greenland and narrower near the Canadian Islands.
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Small, Aaron Brent. "A comparative evaluation of surface runoff models and methods on small developing watersheds in Northern Virginia." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-03302010-020635/.

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Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1993.
18 color maps in back pocket. Vita. Abstract. Includes bibliographical references (leaves 137-139). Also available via the Internet.
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Zeng, Tao. "Three-Dimensional Model Analysis of Tropospheric Photochemical Processes in the Arctic and Northern Mid_Latitudes." Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/7648.

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Halogen-driven ozone and nonmethane hydrocarbon losses in springtime Arctic boundary layer are investigated using a regional chemical transport model (CTM). Surface observation of O3 at Alert and Barrow and aircraft observations of O3 and hydrocarbons during the TOPSE experiment from February to May in 2000 are analyzed. We prescribe halogen radical distributions based on GOME BrO observations and calculated or observed other halogen radical to BrO ratios. GOME BrO shows an apparent anti-correlation with surface temperature over high BrO regions. At its peak, area of simulated near-surface O3 depletions (O3 LT 20ppbv) covers GT 50% of the north high latitudes. Model simulated O3 losses are in agreement with surface and aircraft O3 observations. Simulation of halogen distributions are constrained using aircraft hydrocarbon measurements. We find the currently chemical mechanism overestimate the Cl/BrO ratios. The model can reproduce the observed halogen loss of NMHCs using the empirical Cl/BrO ratios. We find that the hydrocarbon loss is not as sensitive to the prescribed boundary layer height of halogen as that of O3, therefore producing a more robust measure for evaluating satellite column measurement. Tropospheric tracer transport and chemical oxidation processes are examined on the basis of the observations at northern mid-high latitudes and over the tropical Pacific and the corresponding global 3D CTM (GEOS-CHEM) simulations. The correlation between propane and ethane/propane ratio is employed using a finite mixing model to examine the mixing in addition to the OH oxidations. At northern mid-high latitudes the model agrees with the observations before March. The model appears to overestimate the transport from lower to middle latitudes and the horizontal transport and mixing at high latitudes in May. Over the tropical Pacific the model reproduces the observed two-branch slope values reflecting an underestimate of continental convective transport at northern mid-latitudes and an overestimate of latitudinal transport into the tropics. Inverse modeling using the subsets of observed and simulated data is more reliable by reducing (systematic) biases introduced by systematic model transport model transport errors. On the basis of this subset we find the model underestimates the emissions of ethane and propane by 14 5%.
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Dupigny-Giroux, Lesley-Ann. "Techniques for rainfall estimation and surface characterization over northern Brazil." Thesis, McGill University, 1996. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=40345.

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The sertao of northeast Brazil is a semiarid region characterized by recurring droughts. The vastness of the area (650,000 km$ sp2)$ poses a challenge to the effective monitoring of the impacts of drought at a scale that would be useful to the inhabitants of the sertao. Remote sensing data provide a viable way of assessing the extent and nature of drought across the landscape.
The work present a more effective algorithm to estimate rainfall from both the cold and warm cloud types present. Using a decision-tree methodology, the analysis yields rainfall estimates over the 0-21 mm range. Because seasonal variations in rainfall produce differences in vegetation, soils and hydrologic responses, Principal Components Analysis was used to examine these land surface responses. Individual components and component pairings were useful in identifying variations in vegetation density, geobotanical differences and drainage characteristics. The presence of cloud cover was found to dampen the land surface information that could be extracted. Landsat Thematic Mapper (TM) imagery was then used to produce a moisture index which characterizes surface wetness in relation to other features present in a scene. The multispectral combination of TM bands 1, 4 and 6 allowed for the separation of the surface types present, in locational space. This space was defined by an open-ended triange made up of a vertical "water line", a horizontal line of equal vegetation density; and a negatively-slopping iso-moisture line. The stability of the moisture index was influenced by varying scale and seasonal conditions.
In the drought conditions that prevailed in 1991-1992, these methods provide important additions to existing drought monitoring approaches in the Brazilian northeast. Further calibration is required in order to extend their applicability to other geographical regions and time frames.
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Henderson, Susan Jane. "Analysis of the long-term slope stability of waste-rock dumps /." Title page, table of contents and abstract only, 1992. http://web4.library.adelaide.edu.au/theses/09PH/09phh4972.pdf.

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Hardison, Tanya. "Applications of Remote Sensing and GIS to Modeling Fire for Vegetative Restoration in Northern Arizona." Thesis, University of North Texas, 2003. https://digital.library.unt.edu/ark:/67531/metadc4323/.

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An accurate fire model is a useful tool in predicting the behavior of a prescribed fire. Simulation of fire requires an extensive amount of data and can be accomplished best using GIS applications. This paper demonstrates integrative procedures of using of ArcGIS™, ERDAS Imagine™, GPS, and FARSITE© to predict prescribed fire behavior on the Kaibab-Paiute Reservation. ArcGIS was used to create a database incorporating all variables into a common spatial reference system and format for the FARSITE model. ArcGIS Spatial Analyst was then used to select optimal burn sites for simulation. Our predictions will be implemented in future interagency efforts towards vegetative restoration on the reservation.
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Fournié, Guillaume. "The potential for silent circulation of highly pathogenic avian influenza viruses subtype H5N1 to be sustained in live bird markets : a survey of markets in northern Viet Nam and Cambodia and mathematical models of transmission." Thesis, Royal Veterinary College (University of London), 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.559027.

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Aarts, Geert. "Modelling space-use and habitat preference from wildlife telemetry data." Thesis, St Andrews, 2007. http://hdl.handle.net/10023/327.

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Books on the topic "Northern Mathematical models"

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Carlson, John D. A model of the productivity of the northern pintail. Washington, D.C: U.S. Dept. of the Interior, Fish and Wildlife Service, 1993.

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Schroeder, Richard L. Habitat suitability index models: Northern bobwhite. Washington, DC: Western Energy and Land Use Team, Division of Biological Services, Research and Development, Fish and Wildlife Service, U.S. Dept. of the Interior, 1985.

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Udry, Christopher. A competitive analysis of rural credit: State-contingent loans in northern Nigeria. New Haven, Conn: Economic Growth Center, Yale University, 1991.

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Menzel, Jennifer M. A habitat model for the Virginia northern flying squirrel (glaucomys sabrinus fuscus) in the Central Appalachian Mountains. Newtown Square, PA: United States Dept. of Agriculture, Forest Service, Northeastern Research Station, 2005.

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Botkin, Daniel B. Status and future of salmon of western Oregon and northern California: Analysis of fish models. Santa Barbara, Calif: Center for the Study of the Environment, 1994.

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S, Solomon Dale. Modeling the regeneration of northern hardwoods with FORGEN. [Newtown Square, Pa.]: U.S. Dept. of Agriculture, Forest Service, Northeastern Research Station, 2002.

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Geary, Patrick T. The determinants of employment in Northern Ireland 1959-1983: An empirical investigation. Maynooth, Co Kildare: Maynooth College, Department of Economics, 1986.

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Ragen, Timothy J. Maximum net productivity level estimation for the northern fur seal (Callorhinus ursinus) population of St. Paul Island, Alaska. Seattle, WA: Alaska Fisheries Science Center, National Marine Fisheries Service, U.S. Dept. of Commerce, 1992.

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S, Solomon Dale. FIBER handbook: A growth model for spruce-fir and northern hardwood forest types. [Broomall, Pa.]: U.S. Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station, 1987.

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S, Solomon Dale. FIBER handbook: A growth model for spruce-fir and northern hardwood forest types. [Broomall, Pa.]: U.S. Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station, 1987.

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Book chapters on the topic "Northern Mathematical models"

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Bacovis, Marcia M. C., and Miriam Borchardt. "Circular Business Models: A Multiple Case Study in Manufacturing Companies in Northern Brazil." In Springer Proceedings in Mathematics & Statistics, 395–407. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-14763-0_31.

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Aliustaoğlu, Feyza, and Abdulkadir Tuna. "Brain-Based Learning." In Handbook of Research on Innovations in Non-Traditional Educational Practices, 361–78. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-4360-3.ch019.

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Many models that take into account the learning styles have been developed with the formation of modern educational approaches. 4MAT model is a natural learning process moving sequentially through the learning cycle. According to the 4MAT model there are four learning styles and each student can learn more comfortable with their own learning styles. In consideration of neurological studies, also, the dominant hemisphere used by individuals in the information processing process is important in the 4MAT model. This chapter presents a lesson plan based on the 4MAT model as well as the results regarding the application of this lesson plan in a middle school located in the northern part of Turkey. The lesson plan was prepared by examining the books titled “4MAT 4 algebra: The system of mathematics” and “4 MAT 4 geometry teacher book” and receiving expert opinions.
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Rosenzweig, Cynthia, and Daniel Hillel. "Regional Activities in a Global Framework: Developing and Developed Countries." In Climate Variability and the Global Harvest. Oxford University Press, 2008. http://dx.doi.org/10.1093/oso/9780195137637.003.0012.

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Regional studies and activities related to the El Niño–Southern Oscillation (ENSO) and other oscillations, seasonal climate prediction, and agricultural impacts are in progress around the world (figure 7.1). Here we describe some regional impacts and programs in place that are entraining climate information into decision making. Elements of these activities include the definition of the agricultural or other targeted systems; exploration of the social, political, and cultural contexts; examination of the temporal and spatial patterns of physical and biological impacts related to ENSO; analysis of economic effects; development and testing of seasonal climate forecasts and their delivery; investigation of crop management and other adaptations leading to implementation of dynamic risk-management strategies; and the development and evaluation of programs. In northern Peru, El Niño events bring torrential rains and floods that damage crops by eroding slopes, silting valleys, and oversaturating soils. The precipitation regime of Chile is likely to be intensified as well when El Niño events occur (Meza et al., 2003). Downscaled seasonal climate forecasts and crop growth models have been used to evaluate the impact of ENSO and management responses on crops in the Andean highlands of Peru (Baigorria, 2007); and Meza (2007) combined stochastic modeling of meteorological variables, a simple soil crop algorithm, and a mathematical programming model to assess the value of ENSO information for irrigation in the Maipo River Basin, Chile. Central America, being a narrow strip of land tightly squeezed between the Atlantic and Pacific oceans, is particularly influenced by major global climate variability systems, especially the El Nino–Southern Oscillation and the Arctic Oscillation (AO; M. Campos and P. Ramirez, personal communication, 2007; Rosenzweig et al., 2007). El Niño events are associated with dry summers on the Pacific coast and wet summers on the Caribbean coast, while the opposite pattern is associated with La Niña. A decrease in winter rainfall on the Caribbean coast since the late 1970s has been linked to changes in the Arctic Oscillation. Events with important economic and social consequences affected Central America in 1926, 1945–56, 1956–57, 1965, 1972–73, 1982–83, 1992–94, and 1997–98 (Ramirez, 2005).
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Conference papers on the topic "Northern Mathematical models"

1

Izhutkin, Viktor Sergeyevich, and Htoo Khant Aung. "Computer Modelling of Richardson’s Mathematical Model." In 2021 Joint International Conference on Digital Arts, Media and Technology with ECTI Northern Section Conference on Electrical, Electronics, Computer and Telecommunication Engineering. IEEE, 2021. http://dx.doi.org/10.1109/ectidamtncon51128.2021.9425770.

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Rungrattanaubol, Jaratsri, and Anamai Na-udom. "An efficient rice yield predictive model in lower northern Thailand." In INTERNATIONAL CONFERENCE ON MATHEMATICS, ENGINEERING AND INDUSTRIAL APPLICATIONS 2016 (ICoMEIA2016): Proceedings of the 2nd International Conference on Mathematics, Engineering and Industrial Applications 2016. Author(s), 2016. http://dx.doi.org/10.1063/1.4965174.

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3

Shcheglova, S. N., and B. O. Shcheglov. "Development of a mathematical model for assessing the biophysical effect of radiation on human health in the North." In XXV REGIONAL SCIENTIFIC CONFERENCE STUDENTS, APPLICANTS AND YOUNG RESEARCHERS. Знание-М, 2020. http://dx.doi.org/10.38006/907345-63-8.2020.155.162.

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The aim of the study is to create a mathematical-biophysical model for modeling the dynamics of the action of solar radiation on the environment of the northern regions of the Earth. Using the Schrödinger wave function, the propagation of the intensity of solar radiation is presented. As a result, a biophysical model of the action of electromagnetic radiation is obtained.
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Bulanov, S. "REFLECTION OF THE RELIEF ON THE HISTORICAL MAPS OF THE NORTHERN BLACK SEA REGION." In Man and Nature: Priorities of Modern Research in the Area of Interaction of Nature and Society. LCC MAKS Press, 2021. http://dx.doi.org/10.29003/m2609.s-n_history_2021_44/233-239.

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There are 4 stages in the development of the cartography of the Northern Black Sea region, with an emphasis on the mapping of the relief. The first corresponds to antiquity, when the relief as such was not depicted on the maps, and it could be judged by indirect signs. The second corresponds to a time usually attributed to the Middle Ages. At this stage, the relief on the maps of the Northern Black Sea region is often indicated by special icons, less often by lines, which, however, were more likely works of art than sources of information about objects on the ground, moreover, about the accuracy of their location. The presence and nature of these icons, as a rule, were dictated by the taste, imagination, and limited awareness of the authors of the maps. The third stage – New time – an era of rapid development of science and industry, as well as new socio-political tasks that confronted cartographers. This is the era of the transition of maps of the Northern Black Sea region to an accurate mathematical basis, a large scale, specialization in purpose and branches of knowledge. Relief display moves to a new qualitative level, and it often becomes the main content of maps, especially topographic ones. The fourth stage is primarily the 20th and 21st centuries. The method of isolines (horizontals) becomes the leading one, which in recent decades has been actively supplemented by aerospace information and computer processing.
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Wang, Xiao, Lin Fu, Xiling Zhao, and Hua Liu. "Thermodynamic Analysis of a Central Heating System Combing the Urban Heat Network With Geothermal Energy." In ASME 2013 7th International Conference on Energy Sustainability collocated with the ASME 2013 Heat Transfer Summer Conference and the ASME 2013 11th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/es2013-18285.

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In recent years, with the continuous urban expansion, the central heating sources are commonly insufficient in the areas of Northern China. Besides, the increasing heat transfer temperature difference results in more and more exergy loss between the primary heat network and the secondary heat network. This paper introduces a new central heating system which combines the urban heat network with geothermal energy (CHSCHNGE). In this system, the absorption heat exchange unit, which is composed of an absorption heat pump and a water to water heat exchanger, is as alternative to the conventional water to water heat exchanger at the heat exchange station, and the doing work ability of the primary heat network is utilized to drive the absorption heat pump to extract the shallow geothermal energy. In this way, the heat supply ability of the system will be increased with fewer additional energy consumptions. Since the water after driving the absorption heat pump has high temperature, it can continue to heat the supply water coming from the absorption heat pump. As a result, the water of the primary heat network will be stepped cooled and the exergy loss will be reduced. In this study, the performance of the system is simulated based on the mathematical models of the heat source, the absorption heat exchange unit, the ground heat exchanger and the room. The thermodynamic analyses are performed for three systems and the energy efficiency and exergy efficiency are compared. The results show that (a) the COP of the absorption heat exchange unit is 1.25 and the heating capacity of the system increases by 25%, which can effectively reduce the requirements of central heating sources; (b) the PER of the system increases 14.4% more than that of the conventional co-generation central heating system and 54.1% more than that of the ground source heat pump system; (c) the exergy efficiency of the CHSCHNGE is 17.6% higher than that of the conventional co-generation central heating system and 45.6% higher than that of the ground source heat pump system.
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Ratnanandan, Rajeevan, and Jorge E. González. "A System Modeling Approach for Active Solar Heating and Cooling System With Phase Change Material (PCM) for Small Buildings." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-93038.

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The paper presents a study of the performance of an active solar thermal heating and cooling system for small buildings. The work is motivated by the need for finding sustainable alternatives for building applications that are climate adaptable. The energy demand for heating and cooling needs in residential and light commercial buildings in mid-latitudes represent more than 50% of the energy consumed annually by these buildings. Solar thermal energy represents an untapped opportunity to address this challenge with sustainable solutions. Direct heating could be a source for space heating and hot water, and for heat operated cooling systems to provide space cooling. However, a key limitation in mainstreaming solar thermal for heating and cooling has been the size of thermal storage to implement related technologies. We address this issue by coupling a Phase Change Material (PCM) with an adsorption chiller and a radiant flooring system for year round solar thermal energy utilization in Northern climates. The adsorption chiller allows for chill water production driven by low temperature solar thermal energy for summer cooling, and low temperature radiant heating provides for space heating in winter conditions, while hot water demand is supplied year round. These active systems are operated by high performance solar thermal collectors. The PCM has been selected to match temperatures requirements of the adsorption chiller, and the tank was designed to provide three levels of temperatures for all applications; cooling, heating, and hot water. The material selection is paraffin sandwiched with a graphite matrix to increase the conductivity. The specific objective of the preset work is to provide a system optimization of this active system. The system is represented by a series of mathematical models for each component; PCM tank with heat exchangers, the adsorption machine, the radiant floor, and the solar thermal collectors (Evacuated tubular collectors). The PCM modeling allows for sensible heating, phase change process, and superheating. Parametric simulations are conducted for a defined small building in different locations in US with the objective of defining design parameters for; optimal solar collector array, sizing of the PCM tank, and performance of the adsorption machine and radiant heating system. The monthly and annual solar fractions of the system are also reported.
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Kharitonov, Mikhail A., Rostislav P. Dokuchaev, Anna A. Vasilchenko, and Alexander A. Voronin. "Development of a Simulation Model of the Evacuation Process for the Population of the Northern Part of the Volga-Akhtuba Floodplain." In 2022 4th International Conference on Control Systems, Mathematical Modeling, Automation and Energy Efficiency (SUMMA). IEEE, 2022. http://dx.doi.org/10.1109/summa57301.2022.9973435.

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Fa¨lt, Martin, and Ron Zevenhoven. "Radiative Cooling in Northern Europe Using a Roof Window." In ASME 2010 4th International Conference on Energy Sustainability. ASMEDC, 2010. http://dx.doi.org/10.1115/es2010-90192.

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The design and performance of a triple glass window used as a roof component was analyzed in this paper. A mathematical model was set up for the component and weather data for the Finnish city Helsinki was used to assess its performance. This roof component would act as a passive radiative cooler during the summer and as a thermal insulator during the rest of the year. This versatile usage of the window component would thus decrease the need for traditional air-conditioning during summer and hence save electricity. The triple glass window would consist of one normal silica window and of two High Density Polyethylene (HPDE) windows. The space between the three windows would contain a (pressurized) greenhouse gas that would act as the heat carrier in this system. The heat would be transferred in to the system to the gas by heat radiation, conduction and natural convection through the window facing the room. This heated gas would then rise to the upper vacant space due to a decrease in the gases density caused by the heating. In the upper vacant part, the gas would then be cooled by radiative cooling through the HDPE, and the atmospheric window with colder air masses in the upper atmosphere. When, the greenhouse gas would have cooled down its density would increase and the gas would drop to the lower part of the window component. During times when no cooling would be needed the connection between the two vacant spaces would be cut, thus changing the roof components’ task from a passive radiative cooler to a thermal insulator. The heating of the space due to sunshine is of course evident and lower temperatures would be achieved if no window at all be used, but for places were roof windows are built this component would offer a viable alternative. This paper is a continuation to the paper by Zevenhoven and Fa¨lt submitted to this conference (1).
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Sesay, Joseph Saidu, and Fatmata Sheriff Binta. "Experience Of Teaching From A Distance." In IASE 2021 Satellite Conference: Statistics Education in the Era of Data Science. International Association for Statistical Education, 2022. http://dx.doi.org/10.52041/iase.rylmv.

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This study is motivated by a desire to understand the challenges tutors and student-teachers of distant teaching and learning at the University of Makeni face as they pursue higher teachers’ education in Mathematics/Statistics. The research was carried out in northern Sierra Leone. Data were collected and processed. The study utilizes structured questionnaires to the study population, which were analyzed through tables, frequencies, marginal percentages, and the logistic regression model to produce descriptive and inferential statistics. The statistical analysis was done at a 95 percent significant level using the SPSS version (20). Insufficient time, moderate institutional and individual participation, lack of devices and capabilities to access online teaching and learning materials, and more are the findings. Findings suggest UniMak to do more to sustain effective and balanced teaching and learning system that will satisfy the learners' desires to return to UniMak for future studies or recommend the institution to their colleagues.
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10

Mazaheri, Said, and Zeynab Sabouri Shargh. "How to Increase the Capacity of an Existing Sea Water Intake." In ASME 2007 26th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2007. http://dx.doi.org/10.1115/omae2007-29143.

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Sea Water Intakes supplying water for desalination, cooling systems, or other parts of many important industrial components, such as refineries, and power plants are usually built in the shore lines and close to the target systems. In some conditions, such as expansion of the refinery, or other plants and in order to avoid building a new sea water intake because of lack of the suitable land or expending a lot of money, it is required to enhance the amount of withdrawing water and increase the capacity of the existing sea water intake. In such conditions, several important factors such as, minimum required submergence depth for the pumps, maximum allowed current velocity at the entry of the suction chambers, maximum allowed current velocity inside the intake and near the filters, and the flow pattern should be checked. In this paper, it is tried to describe these factors and restrictions. In addition, a case study sea water intake located in South Pars Gas Field at the northern shore line of the Persian Gulf in the province of Boushehr, Iran, is considered and the mentioned factors and restrictions for increasing the capacity of sea water intake from 25,000 to 35,000 is discussed. Besides, a hydraulic mathematical model has been used to check the flow line of the developed system. At the end the results are discussed.
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