scholarly journals Distortion Effects in Equal Area Unit Maps

2021 ◽  
Author(s):  
Jochen Schiewe
Keyword(s):  
Hot Spots ◽  
Extreme Values ◽  
Generation Process ◽  
Equal Area ◽  
Topological Relationships ◽  
Area Unit ◽  
Task Oriented ◽  
Local Topology ◽  
Selection Of ◽  
Local Extreme

AbstractMaps that correctly represent the geographic size and shape of regions, taking into account scaling and generalization, have the disadvantage that small regions can easily be overlooked or not seen at all. Hence, for some map use tasks where small regions are of importance, alternative map types are needed. One option is the so-called equal area unit maps (EAUMs), where every enumeration unit has the same area size, possibly also the same basic shape such as squares or hexagons. The geometrical distortion of EAUMs, however, leads to a more difficult search for regions as well as a falsification of topological relationships and spatial patterns. To describe these distortions, a set of analytical measures is proposed. But it turns out that the expressiveness of these measures is rather limited. To better understand and to model the influence of distortions, two user studies were conducted. The study on the search in EAUMs (also with the aim of reconstruct the search strategies of the users) revealed how important it is to consider the local topology (e.g. corner or border positions of regions) during the generation process. With regard to pattern identification, it could be shown that EAUMs significantly increase the detection rate of local extreme values. On the other hand, global lateral gradients or geostatistical hot spots often get blurred or even lost. As a consequence, a task-oriented selection of map types and further developments are recommended.

scholarly journals Research progress of analysis method of slope stability combined with hot spots

2020 ◽  
Vol 198 ◽  
pp. 02008
Author(s):  
XIE Qiao ◽  
ZHANG Jia-sheng ◽  
Wang Xuan
Keyword(s):  
Slope Stability ◽  
Hot Spots ◽  
Development Trend ◽  
Research Progress ◽  
Analysis Methods ◽  
Scope Of Application ◽  
The Times ◽  
The Development Trend ◽  
Selection Of

The analysis methods and theories of slope stability are constantly improving and developing, and more methods in line with the development characteristics of the times have been put forward by scholars at home and abroad. Combined with the latest research hot spots in the direction of analysis methods of slope stability in the world, the analysis methods of slope stability are systematically classified and summarized; The principles, characteristics, scope of application of various methods are summarized; The development trend of slope stability analysis is comprehensively analyzed from various aspects. It provides the follow-up scholars with the research of new methods. It can provide reference for the selection of evaluation methods of practical slope engineering stability.

Selection of Best Smartphone Using Revised ELECTRE-III Method

2018 ◽  
Vol 17 (06) ◽  
pp. 1915-1936 ◽  
Author(s):  
I-Fei Chen ◽  
Ruey-Chyn Tsaur ◽  
Po-Ying Chen
Keyword(s):  
Extreme Values ◽  
Selection Procedure ◽  
Communication Tool ◽  
Quality Model ◽  
Respective Group ◽  
Electre Iii ◽  
The World ◽  
Feature Fatigue ◽  
Suitable Product ◽  
Selection Of

Since smartphones have become the most prevalent communication tool in the world, a wide variety of low-end to high-end smartphone products are currently available on the market. Choosing a suitable product becomes a challenge due to the problem of feature fatigue. This study developed a smartphone selection procedure for prospective users by incorporating ELECTRE-III method with Kano two-dimensional quality model. An empirical example of 15 smartphones from three different categories, namely, flagship, screen size and price, demonstrated that the credibility matrix of the revised ELECTRE-III had fewer extreme values (0 and 1) than its original counterpart. It was able to clearly distinguish the relative satisfaction of each option in the respective group, particularly for the tied products which could not be discerned by the original ELECTRE-III.

The Morphological Features of Adaptation of the Yeast of the Genus Saccharomyces to Extreme Values of Glucose and Ethanol

2020 ◽  
pp. 95-101
Author(s):  
Elvira A. Islammagomedova ◽  
Eslanda A. Khalilova ◽  
Svetlana Ts. Kotenko ◽  
Aida A. Abakarova ◽  
Dinara A. Aliverdieva
Keyword(s):  
Extreme Values ◽  
Surface Profile ◽  
Morphological Properties ◽  
Ethanol Stress ◽  
Extreme Conditions ◽  
Haploid Strain ◽  
Food Biotechnology ◽  
Round Shape ◽  
Granular Cytoplasm ◽  
Selection Of

The influence of extreme values of glucose and ethanol on the morphological properties of the yeast of the genus Saccharomyces was studied. The ability of strains S. cerevisiae Y-503, S. cerevisiae DAW-3a, and S. oviformis M-12X to adapt to stress was found. The dependence of the functional state and morphological properties of the studied strains on ploidy was shown. It was established that the cell forms of S. cerevisiae Y-503 and S. oviformis M-12X were diverse, the cells of the haploid strain S. cerevisiae DAW-3a were characterized by a round shape and smaller sizes compared to the polyploid strain Y-503 and diploid M-12X. Adaptation to different concentrations of glucose was accompanied by a change in the shape of the cells Y-503 and DAW-3a, while the sizes of cells were practically un-changed. Under conditions of simultaneous osmotic and ethanol stress in the cells of the studied strains, the presence of granular cytoplasm was revealed, which is associated with the accumulation of reserve nutrients. A change in the shape of the cells, form, surface, profile, color, size of colonies was detected. The study of the properties of the yeast of the genus Saccharomyces in the process of adaptation to extreme conditions may serve as the basis for the selection of strains that are promising for use in food biotechnology.

Simulation on NOx Generation of RSP Calciner for Cement Production

2012 ◽  
Vol 535-537 ◽  
pp. 1647-1651
Author(s):  
Mao Ya ◽  
Zuo Bing Chen
Keyword(s):  
Nitrogen Oxide ◽  
Automobile Industry ◽  
Pollution Source ◽  
Cement Industry ◽  
Generation Process ◽  
Cement Production ◽  
Forming Mechanism ◽  
Operation Process ◽  
Thermal Nox ◽  
Selection Of

At present, cement industry will be the third major pollution source of nitrogen oxide pollution following electric power and automobile industry. According to Chinese 12th Five-Year Plan, nitrogen oxide emission must be decreased 10%. In this paper, the resources of NOx emission from cement production were analyzed. On the basis of forming mechanism of thermal NOx and fuel NOx, a simulation model was constructed to predict NOx generation process in RSP calciner. For the turbulent flow in calciner, a probability density function (PDF) describing time variation is used in model to predict NOx generation rate. The results provide important theory evidence for low-NOx calciner design and selection of its operation process parameter.

scholarly journals Genomic Diversity ofLactobacillus salivarius

2010 ◽  
Vol 77 (3) ◽  
pp. 954-965 ◽  
Author(s):  
Emma J. Raftis ◽  
Elisa Salvetti ◽  
Sandra Torriani ◽  
Giovanna E. Felis ◽  
Paul W. O'Toole
Keyword(s):  
Hot Spots ◽  
Gene Clusters ◽  
Genomic Variation ◽  
Genomic Diversity ◽  
Comparative Genomic ◽  
Phenotypic Traits ◽  
Lactobacillus Salivarius ◽  
Genome Content ◽  
High Level ◽  
Selection Of

ABSTRACTStrains ofLactobacillus salivariusare increasingly employed as probiotic agents for humans or animals. Despite the diversity of environmental sources from which they have been isolated, the genomic diversity ofL. salivariushas been poorly characterized, and the implications of this diversity for strain selection have not been examined. To tackle this, we applied comparative genomic hybridization (CGH) and multilocus sequence typing (MLST) to 33 strains derived from humans, animals, or food. The CGH, based on total genome content, including small plasmids, identified 18 major regions of genomic variation, or hot spots for variation. Three major divisions were thus identified, with only a subset of the human isolates constituting an ecologically discernible group. Omission of the small plasmids from the CGH or analysis by MLST provided broadly concordant fine divisions and separated human-derived and animal-derived strains more clearly. The two gene clusters for exopolysaccharide (EPS) biosynthesis corresponded to regions of significant genomic diversity. The CGH-based groupings of these regions did not correlate with levels of production of bound or released EPS. Furthermore, EPS production was significantly modulated by available carbohydrate. In addition to proving difficult to predict from the gene content, EPS production levels correlated inversely with production of biofilms, a trait considered desirable in probiotic commensals.L. salivariusdisplays a high level of genomic diversity, and while selection ofL. salivariusstrains for probiotic use can be informed by CGH or MLST, it also requires pragmatic experimental validation of desired phenotypic traits.

scholarly journals OBSERVATION OF ΔφΔη SCALED CORRELATION SIGNALS WHICH INCREASE WITH CENTRALITY OF AuAu COLLISIONS AT $\sqrt{^SNN} = 200\ {\rm GeV}$

2007 ◽  
Vol 16 (07n08) ◽  
pp. 2149-2153 ◽  
Author(s):  
◽  
R. S. LONGACRE
Keyword(s):  
Charged Particle ◽  
Transverse Momentum ◽  
Hot Spots ◽  
Poster Session ◽  
Pair Correlation ◽  
Wave Model ◽  
Minimum Bias ◽  
Momentum Range ◽  
Selection Of ◽  
Star Detector

We show the preliminary charged-particle pair correlation analyses presented in a poster session at the 2006 International Quark Matter Conference in Shanghai China. The correlation analysis space of Δφ (azimuth) and Δη (pseudo-rapidity) are considered as a function of centrality for minimum bias Au + Au collisions in the mid-transverse momentum range in the STAR detector. The analyses involve unlike-sign charge pairs and like-sign charge pairs, which are transformed into charge-dependent (CD) signals and charge-independent (CI) signals. We use a multiplicity scale to compare the different centralities. We find the signals increase with increasing centrality. A model featuring dense gluonic hot spots as first proposed by van Hove predicts that the observables under investigation would have sensitivity to such a substructure should it occur. A blast wave model including multiple hot spots motivates the selection of transverse momenta in the range 0.8 GeV /c < pt < 4.0 GeV /c.

scholarly journals Still Searching or Have You Found It Already? – Usability and Web Design of an Educational Website

2018 ◽  
Vol 9 (1) ◽  
pp. 19-30 ◽  
Author(s):  
Julia Lamberz ◽  
Thorsten Litfin ◽  
Özlem Teckert ◽  
Gunther Meeh-Bunse
Keyword(s):  
Eye Tracking ◽  
Web Design ◽  
Test Group ◽  
Educational Institute ◽  
Search Patterns ◽  
Search Field ◽  
Task Oriented ◽  
Web Designers ◽  
Tracking Technology ◽  
Selection Of

Abstract Background: Apart from a straight-forward and intuitive operability an appealing design determines the success of a website equally well. For this reason, the selection of images and navigation bars plays a determining role. The eye tracking method proved to be appropriate in order to verify the usability of websites. Objectives: The aim of the study was to improve the usability of the website of an educational institute for trainees as target group. Methods/Approach: For this purpose, the use of an eye-tracking technology was combined with a survey. The eye-tracking study was implemented task-oriented. Test persons were asked to search for particular courses within this institute. Results: This approach in combination with a subsequent questionnaire resulted in tangible indications of search patterns of the test group. Furthermore, their perception and their appraisal of the usability as well as the web design was analysed. Even though most tasks were accomplished effectively and efficiently with a positive user feedback, a potential for improvement was detected, in particular with regard to the images and the location of the search field. Conclusions: The selected choice of methods enables researchers and web designers to derive recommendations for the orientation, structure, optimisation and comprehensibility of a website.

scholarly journals Survey on Mutation-based Test Data Generation

2015 ◽  
Vol 5 (5) ◽  
pp. 1164
Author(s):  
Hanh Le Thi My ◽  
Binh Nguyen Thanh ◽  
Tung Khuat Thanh
Keyword(s):  
Test Data ◽  
Test Cases ◽  
Generation Process ◽  
Test Data Generation ◽  
Data Generation ◽  
Comprehensive Survey ◽  
Critical Activity ◽  
Automatic Test Data Generation ◽  
Systematic Selection ◽  
Selection Of

<span>The critical activity of testing is the systematic selection of suitable test cases, which be able to reveal highly the faults. Therefore, mutation coverage is an effective criterion for generating test data. Since the test data generation process is very labor intensive, time-consuming and error-prone when done manually, the automation of this process is highly aspired. The researches about automatic test data generation contributed a set of tools, approaches, development and empirical results. In this paper, we will analyse and conduct a comprehensive survey on generating test data based on mutation. The paper also analyses the trends in this field.</span>

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