scholarly journals Some questions of theoretical cartography

2020 ◽  
Vol 26 (4) ◽  
pp. 329-342
Author(s):  
Tengiz Gordeziani
Keyword(s):  
Time Scale ◽  
Synthesis Time ◽  
Spatiotemporal Model ◽  
Spatiotemporal Information ◽  
Close Relationship ◽  
Analysis And Synthesis ◽  
Multi Temporal ◽  
One Year ◽  
Subject Of Cognition ◽  
Theoretical Issues

The article is devoted to current theoretical issues of modern cartography. The paper puts forward the concept of metacartography, which laid as the foundation for the Theory of Cartography as a science. The author of this concept is the outstanding Georgian cartographer Alexander Aslanikashvili, who is the founder of the theory of cartography. This concept, which in a new way comprehended the main categories of cartography (the subject of cognition of science, the method of studying a certain side of reality and language) by means of which cartography examines its subject, made it possible to raise some questions of theoretical cartography for research: 1) temporal synthesis; 2) timescale; 3) dynamic generalization. The temporary synthesis in the article is considered on the basis of the results of a theoretical study of A. Aslanikashvili, cartographic forms of analysis and synthesis. Temporal synthesis is studied by the example of diurnal state maps of natural-territorial complexes (steks). The process of temporary synthesis of the so-called “multi-temporal maps” is carried out for one year at three levels: 1) synthesis of dynamic maps for one month; 2) synthesis of dynamic maps for one season; 3) synthesis of dynamic maps for one year. As a result of the temporary synthesis of stacks maps, one synthetic map is compiled without loss of the initial spatiotemporal information. In the process of mapping there are used the so-called “spatiotemporal” diagrams. A new concept of “mapped time” was introduced. In cartography, two types of scale are investigated: a) the scale of space (degree of abstraction) and b) the scale of content (degree of generalization). The article studies the timescale when mapping stacks. In the work, this concept is defined as the degree of generalization of the essence of the development of the mapped phenomenon. The article explores another issue — dynamic generalization. The study is based on stacks’ maps for one year. It was found that dynamic generalization depends on the “degree of syntheticity” of the stecks maps. Dynamic generalization is in direct correlation with the number of dynamics maps of the spatiotemporal model phenomenon. The issues of temporal synthesis, time scale and dynamic generalization are in close relationship with each other. For example, dynamic generalization is the result of a temporary synthesis, and these processes are carried out with the presence of a time scale.

scholarly journals CREATING MULTI-TEMPORAL MAPS OF URBAN ENVIRONMENTS FOR IMPROVED LOCALIZATION OF AUTONOMOUS VEHICLES

2020 ◽  
Vol XLIII-B2-2020 ◽  
pp. 317-323
Author(s):  
J. Schachtschneider ◽  
C. Brenner
Keyword(s):  
Urban Areas ◽  
Autonomous Vehicles ◽  
Weather Conditions ◽  
Point Clouds ◽  
Urban Environments ◽  
Seasonal Effects ◽  
Data Set ◽  
Multi Temporal ◽  
One Year

Abstract. The development of automated and autonomous vehicles requires highly accurate long-term maps of the environment. Urban areas contain a large number of dynamic objects which change over time. Since a permanent observation of the environment is impossible and there will always be a first time visit of an unknown or changed area, a map of an urban environment needs to model such dynamics.In this work, we use LiDAR point clouds from a large long term measurement campaign to investigate temporal changes. The data set was recorded along a 20 km route in Hannover, Germany with a Mobile Mapping System over a period of one year in bi-weekly measurements. The data set covers a variety of different urban objects and areas, weather conditions and seasons. Based on this data set, we show how scene and seasonal effects influence the measurement likelihood, and that multi-temporal maps lead to the best positioning results.

scholarly journals Spectra of Southern Radio Sources

1977 ◽  
Vol 74 ◽  
pp. 85-97 ◽  
Author(s):  
J. G. Bolton
Keyword(s):  
Time Scale ◽  
Galactic Plane ◽  
Complete Sample ◽  
High Frequencies ◽  
The Past ◽  
Average Accuracy ◽  
Sky Survey ◽  
Two Factors ◽  
Optical Identifications ◽  
One Year

Surveys of the sky between declinations +25° and −90° at 2700 MHz (11 cm) have been in progress for the past 10 years. Excluding some regions close to the galactic plane the whole sky south of +25° has been surveyed to a flux density limit of 0.6 Jy at 2700 MHz and within this area surveys to limits of 0.35, 0.25 or 0.1 Jy have been made covering 3.5 sr. Flux densities have been measured at 5000 MHz for all sources stronger than 0.35 Jy at 2700 MHz. The source positions have an average accuracy of 10″ arc in both coordinates and the positions have been examined for optical identifications on Palomar, ESO or SRC sky survey plates, which now cover 95% of the area. The first part of this paper concerns the relationships between the spectral indices α(2700 to 5000 MHz) and the identifications of the 2300 sources with galactic latitudes greater than 10°. It is a statistically significant sample, since the sources stronger than 0.35 Jy cover 3.5 sr. It is also a representative sample, since no selection was made on the basis of spectral index or identification. It cannot however be claimed as a complete sample, for two reasons. A substantial fraction of sources found in radio surveys at high frequencies are variable - variations of up to a factor of three can occur on a time scale of a year - thus the various sections of the survey are complete only for the relevant epoch. Many of their optical counterparts are also variables - variations of up to a factor of 100 can occur on a time scale of one year. It is hoped to make some assessment of the effect of these two factors in the next two years, when second-epoch Parkes surveys will begin and SRC Schmidt plates will overlap the Palomar Sky Survey.

scholarly journals Assessing the Wet Deposition Mechanism of Benzo(a)pyrene in the Atmosphere by MF-DCCA

Atmosphere ◽  
2019 ◽  
Vol 10 (6) ◽  
pp. 331 ◽  
Author(s):  
Chunqiong Liu ◽  
Kai Shi ◽  
Jian Liang ◽  
Hongliang Huang
Keyword(s):  
Time Scale ◽  
Wet Deposition ◽  
Cross Correlation ◽  
Coefficient Of Determination ◽  
Scaling Properties ◽  
Temporal Scaling ◽  
Cross Correlation Analysis ◽  
Cross Correlations ◽  
One Year

Based on the 19 year observation from 1998 to 2016 at the Tsuan Wan and Central/Western District monitoring stations in Hong Kong, the aim of this paper was to assess the wet deposition pathway of Benzo(a)pyrene (BaP) on a large time-scale. In order to achieve this goal, multi-fractal detrended cross-correlation analysis (MF-DCCA) was used to characterize the long-term cross-correlations behaviors and multi-fractal temporal scaling properties between BaP (or PM2.5) and precipitation. The results showed that the relationships between BaP and precipitation (or PM2.5) displayed long-term cross-correlation at the time-scale ranging from one month to one year; no cross-correlation between each other was observed in longer temporal scaling regimes (greater than one year). These results correspond to the atmospheric circulation of the Asian monsoon system and are explained in detail. Similar dynamic processes of the wet deposition of BaP and PM2.5 suggested that the main removal process of atmospheric BaP was rainfall deposits of PM2.5-bound BaP. Furthermore, cross-correlations between BaP (or PM2.5) and precipitation at the long time-scale have a multi-fractal nature and long-term persistent power-law decaying behavior. The temporal evolutions of the multi-fractality were investigated by the approach of a sliding window. Based on the evolution curves of multi-fractal parameters, the wet deposition pathway of PM2.5-bound BaP is discussed. Finally, the contribution degree of wet deposition to PM2.5-bound BaP was derived from the coefficient of determination. It was demonstrated that about 45% and 60% of atmospheric BaP removal can be attributed to the wet deposition pathway of PM2.5-bound BaP for the Tsuan Wan and Central/Western District areas, respectively. The findings in this paper are of great significance for further study on the removal mechanism of atmospheric BaP in the future. The MF-DCCA method provides a novel approach to assessing the geochemical cycle dynamics of BaP.

scholarly journals The early elasmobranch Phoebodus : phylogenetic relationships, ecomorphology and a new time-scale for shark evolution

2019 ◽  
Vol 286 (1912) ◽  
pp. 20191336 ◽  
Author(s):  
Linda Frey ◽  
Michael Coates ◽  
Michał Ginter ◽  
Vachik Hairapetian ◽  
Martin Rücklin ◽  
...  
Keyword(s):  
Phylogenetic Analysis ◽  
Time Scale ◽  
Body Shape ◽  
Skeletal Remains ◽  
Late Devonian ◽  
Crown Group ◽  
Anatomical Knowledge ◽  
Close Relationship ◽  
Stem Lineage ◽  
Fin Spines

Anatomical knowledge of early chondrichthyans and estimates of their phylogeny are improving, but many taxa are still known only from microremains. The nearly cosmopolitan and regionally abundant Devonian genus Phoebodus has long been known solely from isolated teeth and fin spines. Here, we report the first skeletal remains of Phoebodus from the Famennian (Late Devonian) of the Maïder region of Morocco, revealing an anguilliform body, specialized braincase, hyoid arch, elongate jaws and rostrum, complementing its characteristic dentition and ctenacanth fin spines preceding both dorsal fins. Several of these features corroborate a likely close relationship with the Carboniferous species Thrinacodus gracia , and phylogenetic analysis places both taxa securely as members of the elasmobranch stem lineage. Identified as such, phoebodont teeth provide a plausible marker for range extension of the elasmobranchs into the Middle Devonian, thus providing a new minimum date for the origin of the chondrichthyan crown-group. Among pre-Carboniferous jawed vertebrates, the anguilliform body shape of Phoebodus is unprecedented, and its specialized anatomy is, in several respects, most easily compared with the modern frilled shark Chlamydoselachus . These results add greatly to the morphological, and by implication ecological, disparity of the earliest elasmobranchs.

scholarly journals Characterization of free amino acids, bacteria and fungi in size-segregated atmospheric aerosols in boreal forest: seasonal patterns, abundances and size distributions

2017 ◽  
Author(s):  
Aku Helin ◽  
Outi-Maaria Sietiö ◽  
Jussi Heinonsalo ◽  
Jaana Bäck ◽  
Marja-Liisa Riekkola ◽  
...  
Keyword(s):  
Amino Acids ◽  
Boreal Forest ◽  
Atmospheric Aerosols ◽  
Free Amino Acids ◽  
Free Amino ◽  
Meteorological Parameters ◽  
Close Relationship ◽  
Temperature Radiation ◽  
Bacteria And Fungi ◽  
One Year

Abstract. Bioaerosols are ubiquitous in the atmosphere and constitute ~ 30 % of atmospheric aerosol particle mass in sizes > 1 μm. Bioaerosol components, such as bacteria, fungi and pollen, may affect the climate by acting as could-active particles, thus having an effect on cloud and precipitation formation processes. In this study, size-segregated aerosol samples ( 10 μm) were collected in boreal forest (Hyytiälä, Finland) during one year and analyzed for free amino acids (FAAs), DNA concentration and microorganism (bacteria, Pseudomonas and fungi). Measurements were performed using tandem mass spectrometry, spectrophotometry and qPCR, respectively. Meteorological parameters and statistical analysis were used to study their atmospheric implication for results. Distinct annual patterns of bioaerosol components were observed, late spring and autumn being seasons of dominant occurrence. Elevated abundances of FAAs and bacteria were observed during the local pollen season, whereas fungi were observed at highest level during autumn. Meteorological parameters, such as air and soil temperature, radiation and rainfall were observed to possess close relationship with bioaerosol abundances on an annual scale.

AERONET data investigation of the aerosol mixtures over Iasi area, One-year time scale overview

2015 ◽  
Vol 153 ◽  
pp. 57-64 ◽  
Author(s):  
Mihai Marius Cazacu ◽  
Adrian Timofte ◽  
Florin Unga ◽  
Bogdan Albina ◽  
Silviu Gurlui
Keyword(s):  
Time Scale ◽  
Data Investigation ◽  
One Year

scholarly journals Lending as motivation for innovative activity of a modern enterprise

2018 ◽  
Vol 15 (2) ◽  
pp. 213-221 ◽  
Author(s):  
Nataliia Polishchuk ◽  
Olha Hromova ◽  
Ruslana Lopatiuk
Keyword(s):  
Regression Analysis ◽  
Innovative Activity ◽  
Innovation Activity ◽  
Synthesis Methods ◽  
Correlation And Regression Analysis ◽  
Modern Enterprise ◽  
Close Relationship ◽  
Analysis And Synthesis ◽  
Average Annual Cost ◽  
Motivating Factor

The most important motivating factor for enhancing innovation activity is lending as a stimulus for the development of a modern enterprise. The motivation of the Ukrainian enterprise, based on the need for innovative activity lending in ensuring the efficiency of its economic activity, was explored. The authors use different methods of research, for example, analysis and synthesis methods, method of scientific substantiation and comparison of the main indicators of the activity of the investigated enterprise, as well as correlation and regression analysis method. Here is also used the method of correlation and regression analysis to determine the effect of changes in the average annual cost of fixed assets and investments in their modernization on the motivation to increase revenue from the sale of products (goods, products, services), as well as to characterize the functional relationship between income from the sales of products and capital, expenses, investments. The results of the study indicate a close relationship between the indicators, thus there is a high dependence on the increase of the volume of income from the sale of products due to the need to attract financing in the form of lending to innovative products of the investigated enterprise.Lending of innovative activity contributes to the increase of sales volumes and the emergence of its new products, and also serves as a form of strengthening the motivation of enterprise development. As a result of the research, the theoretical principles of using Ukrainian enterprise motivational space with lending involvement for the introduction of innovations have been substantiated.

scholarly journals Wavelet analysis on upwelling index along the Moroccan Atlantic coast

2017 ◽  
Vol 13 (12) ◽  
pp. 276 ◽  
Author(s):  
Bessa Ismail ◽  
Makaoui Ahmed ◽  
Hilmi Karim ◽  
Afifi Mohamed
Keyword(s):  
Time Series ◽  
Wavelet Analysis ◽  
Time Series Analysis ◽  
Time Scale ◽  
Atlantic Coast ◽  
Temperature Data ◽  
Sea Surface ◽  
One Year ◽  
Upwelling Index ◽  
Surface Temperature Data

Wavelet analysis is a relatively new technique, an enormous interest in the application of wavelets has been observed in the recent years. In this paper, we use the wavelet analysis on the upwelling index based on sea surface temperature data from 1993 to 2014 along the Moroccan Atlantic coast, mainly at Cape Cantin, Cape Ghir, Cape Juby, Dakhla and Cape Blanc. We noticed that from Jan 1993 to Oct-1998 and from Sep-2007 to Nov 20014, the upwelling in the five research latitudes increases with fluctuations. The period of Upwelling varies sensitively with the change of time scale. The value of upwelling index in the five latitudes appears similar and present an obvious period of one year in all latitudes studied. This study can be considered an important tool for time series analysis, which can help the studies concerning the upwelling variability.

Sign in / Sign up

Export Citation Format

Share Document