Comparison of visual (MUNSELL) and instrumental measures (CIELAB) of coloured textile standard samples

2019 ◽  
Vol 23 (4) ◽  
pp. 340-354
Author(s):  
Asim Kumar Roy Choudhury ◽  
Biswajit Naskar
Keyword(s):  
Correlation Coefficient ◽  
Design Methodology ◽  
Correlation Coefficients ◽  
Standard Samples ◽  
Content Type ◽  
Psychophysical Data ◽  
Physical Data ◽  
Hue Angle ◽  
Munsell Scale

Purpose This paper aims to compare visual (Munsell) and instrumental (CIELAB) attributes of SCOTDIC colour standards. Design/methodology/approach SCOTDIC cotton and polyester standards of defined hue, value and chroma were subjected to spectrophotometric assessment for finding the corresponding instrumental parameters. The visual and instrumental parameters were compared. Findings The correlation between SCOTDIC value and CIELAB lightness is quite high. Correlation coefficient between SCOTDIC hue and CIELAB hue angle and the correlation between SCOTDIC chroma and CIELAB chroma were only moderate because the CIELAB chroma varied widely at higher chroma. When the standards of SCOTDIC hues having erratic hue angles at two extremes are excluded, the Correlation coefficients between SCOTDIC hue and CIELAB hue angle become high. Research limitations/implications The psychophysical data (visual) are difficult to match with physical data (instrumental). Originality/value The object of the present research is to study and compare visual (Munsell) and instrumental (CIELAB) colorimetric parameters. Munsell scale is physically exemplified by SCOTDIC fabric samples available in two sets, namely, cotton and polyester sets.

A study on comparative colour fading in daylight and xenon arc lamp

2019 ◽  
Vol 23 (1) ◽  
pp. 2-17
Author(s):  
Asim Kumar Roy Choudhury ◽  
Biswapati Chatterjee
Keyword(s):  
Design Methodology ◽  
Correlation Coefficients ◽  
Social Implications ◽  
Direct Dyes ◽  
Light Fastness ◽  
Content Type ◽  
Different Depths ◽  
Experimental Findings ◽  
High Repeatability ◽  
Practical Implications

Purpose The purpose of this paper is to compare light fastness assessments by exposure of fabric dyes with various dyes in daylight and an artificial xenon arc lamp. Design/methodology/approach Cotton fabric dyed with 66 reactive, vat, azoic and direct dyes dyed in different depths were exposed to daylight and Xenon arc lamp for assessment of light fastness by standard methods. The light fastness rating and fading hours by the two methods were analysed and compared statistically. Findings The correlation between the corresponding light fastness rating (LFR) measured in Xenotest and daylight is quite high (0.93). The logarithmic correlation coefficients between fading hour (FH) and LFR in Xenotest and daylight are 0.95 and 0.88, respectively. For Xenotest, the assessed LFRs are same as those predicted from geometric progression up to LFR of 5.5, and thereafter, the former is higher. On the other hand, in the case of daylight, the assessed LFR is lower. Assessments for three successive seasons showed high repeatability in case of Xenotest and moderate repeatability in case of daylight. Assessments for three successive seasons showed high repeatability in case of Xenotest and moderate repeatability in case of daylight. Research limitations/implications The exposure conditions in daylight cannot be controlled or standardised, whereas the exposure in Xenon arc lamp in the accelerated fading instrument can be strictly controlled. These differences in exposure control may affect the repeatability of experimental findings. Practical implications Inconsistent ratings may be because of little deterioration of samples during storage, as well as seasonal variation of daylight. Social implications There are no direct social implications. Originality/value The researches on the comparison of the two light fastness assessment methods have not been reported in any recent publication to the best our knowledge.

Effects of using recycled paper in inkjet printing system on colour difference

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Ufuk Yılmaz ◽  
Ahmet Tutus ◽  
Sinan Sönmez
Keyword(s):  
Design Methodology ◽  
Colour Difference ◽  
Recycled Paper ◽  
Yellow Colour ◽  
Content Type ◽  
A Value ◽  
Colour Measurements ◽  
Colour Changes ◽  
Hue Angle ◽  
Printing System

Purpose This study aims to examine the colour changes affecting inkjet prints after the recycling of papers. Design/methodology/approach For recycling, papers prepared with the INGEDE 11p standard are recycled four times. Pulping, storage, flotation, beating and bleaching processes are applied for each recycling, respectively. Inkjet prints are made on the obtained test papers, and colour measurements are made using an X-Rite eXact spectrophotometer according to the ISO 13655:2017 standard. These processes are applied again to the papers which are recycled four times, and the results are analyzed. In addition, the values of ΔE00 ′, ΔL′, ΔH ′ and ΔC′ are calculated according to ISO 11664-6:2014 standard by making some calculations according to obtained the L′a′b′ values. Findings It is determined that the ΔE00 value increases after each recycling in cyan magenta and yellow colour, whereas it decreases in black. The highest ΔE00 value is calculated after the fourth recycling stage is yellow with a value of 8.33. The lowest ΔE00 value detected is black with a value of 0.76 after the fourth recycling stage. This paper observes that the colour with the most variation in hue angle among recycling repetitions is black and the colour with the highest hue angle value is yellow. It is seen that repeating recycling causes increase in the chromatic values of the prints. Originality/value After the fourth recycling stage, colour changes have reached an important point and can cause important printing problems. In this case, the customer’s approval must be obtained to continue printing. This case is valid for ΔE00 values. Colour differences for print contrast, trapping and print chroma values are either not very important or are positive for quality.

Your social network profile reveals you

2017 ◽  
Vol 13 (1) ◽  
pp. 14-24 ◽  
Author(s):  
Tom Sander ◽  
Phoey Lee Teh ◽  
Biruta Sloka
Keyword(s):  
Social Network ◽  
Design Methodology ◽  
Online Survey ◽  
Correlation Coefficients ◽  
Location Parameter ◽  
Research Field ◽  
Content Type ◽  
Advantages And Disadvantages ◽  
Research Fields ◽  
Network Profile

Purpose This study aims to evaluate the fears of individuals on their profiles’ sharing in social network sites (SNSs), regarding its advantages and disadvantages. The researched issues are related with the employment seeking process. The concern of this study is the deviation observation between the fears acquired by the business and private social media members. Design/methodology/approach This study included an online survey with 236 respondents and calculated indicators of central tendency or location parameter, correlation coefficients and performed analysis of variance. Findings The result indicated and revealed the hidden danger and opportunities among social network members’ profile. This result addressed the need to consider the issue of user’s fears in reengineering the practical use of SNSs by organisations. Research limitations/implications Interesting for further research would be to transfer this research from the employment seeking process in other research fields to generalise the results more accurately. Originality/value The contribution to the research field is to compare different SNSs and to explain the reasons to use SNS profiles to support organisations by their decisions for a valuable strategy. This study provides an insight in use and behaviour of SNS members that support researchers to understand the behaviour of SNS members regarding their profile under consideration of the employment seeking process.

Towards a simple dynamical model of citizens’ perception

Kybernetes ◽  
2015 ◽  
Vol 44 (6/7) ◽  
pp. 1134-1145 ◽  
Author(s):  
Jorge Villalobos ◽  
Mauricio Vargas
Keyword(s):  
Design Methodology ◽  
Correlation Coefficients ◽  
Two Dimensional ◽  
Statistical Regression ◽  
Content Type ◽  
Simple Hypothesis ◽  
Perception Of Quality ◽  
The City ◽  
Simple Dynamical Model

Purpose – The purpose of this paper is to propose a minimal dynamic two-dimensional map for the relation between citizens’ perception of quality of life (y) and their perception of the city Mayor management abilities (F). Design/methodology/approach – The authors use data from the Ciudades cómo vamos? project and test a simple hypothesis: there is a linear positive correlation between y and F. Following the authors propose a two-dimensional map based on ideas from a statistical regression model and a non-linear dynamical map on the [0; 1] interval. Findings – The authors give evidence that suggests that y and F are not linearly correlated. The authors show that the two-dimensional map, mentioned above, is able to reproduce non-trivial and unsynchronized relations between the variables, as well as the whole range of correlation coefficients. Research limitations/implications – There is a very limited amount of data to work with, therefore it was not possible to explore other possible relations thoroughly. Regarding the dynamical map, the authors are aware that there are still many venues for its study. Originality/value – To the authors’ knowledge, this is the first reported attempt at modeling the dynamics between two variables obtained via survey on which perception is a key component of the questions.

Correlation between mechanical and surface properties of SLS parts

2014 ◽  
Vol 20 (4) ◽  
pp. 285-290 ◽  
Author(s):  
Grazielle de Oliveira Setti ◽  
Marcelo Fernandes de Oliveira ◽  
Izaque Alves Maia ◽  
Jorge Vicente Lopes da Silva ◽  
Raluca Savu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Surface Properties ◽  
Laser Power ◽  
Design Methodology ◽  
Selective Laser Sintering ◽  
Correlation Coefficients ◽  
Content Type ◽  
Industrial Environment ◽  
Scattering Measurements ◽  
Nylon 12

Purpose – The purpose of this paper is to compare the results from mechanical testing with measurements of surface-dependent properties performed on polyamide parts made by selective laser sintering (SLS) to assess a possible correlation between them. Design/methodology/approach – Fabrication of Nylon 12 (Duraform PA®) samples using different laser power levels and their characterization by tensile testing, roughness and Raman scattering measurements. Findings – Among the surface methods investigated, the results from Raman spectroscopy are the best ones, but methods dependent on surface analysis are not really suitable as indicators of the mechanical properties. The correlation coefficients for linear fitting obtained when the normalized results of mechanical properties are plotted against the surface properties are too low. Furthermore, the ambiguity between surface and mechanical data makes it impossible to use these surface properties for prediction purposes in the industrial environment. Originality/value – Quantitative evaluation and correlation between mechanical properties and surface properties of SLS-made samples.

Voting behavior in the South Korean presidential election – exploring the regional voting pattern

2019 ◽  
Vol 8 (3) ◽  
pp. 268-281
Author(s):  
Tae Wan Kim
Keyword(s):  
South Korea ◽  
Presidential Election ◽  
Voting Behavior ◽  
Design Methodology ◽  
Presidential Elections ◽  
Correlation Coefficients ◽  
Constant Level ◽  
Local Identity ◽  
Content Type ◽  
South Korean

Purpose The purpose of this paper is to examine regional voting patterns in South Korea using the results from six presidential elections since the 1990s. Design/methodology/approach A χ2 test was used to determine the municipalities where a regional voting pattern emerged, and λ correlation coefficients were calculated to examine changes in the regional voting patterns. Findings The analyses lead to three key findings. First, voting patterns differ in Yeongnam and Honam: regional voting in Yeongnam is getting weaker, it remains strong in Honam. Second, the tendency to vote along regional lines decreased significantly in the election in which the Honam party fielded a candidate with a Yeongnam appeared identity. Third, regional voting patterns declined but then stabilized at a constant level, regardless of the candidates’ local identity, which was confirmed in “Bu-Ul-Gyeong.” Originality/value This paper can empirically verify the manifestation of regional voting pattern and confirm the trend. It is possible to derive a condition for suppressing the regional voting pattern.

Developing a novel recommender network-based ranking mechanism for library book acquisition

2017 ◽  
Vol 35 (1) ◽  
pp. 50-68 ◽  
Author(s):  
Fan Wu ◽  
Ya-Han Hu ◽  
Ping-Rong Wang
Keyword(s):  
Design Methodology ◽  
Empirical Studies ◽  
Correlation Coefficients ◽  
Performance Measure ◽  
Ranking System ◽  
Content Type ◽  
Library Book ◽  
Ranking Mechanism ◽  
Spearman’S Correlation ◽  
Practical Implications

Purpose Most academic libraries provide book recommendation services to enable readers to recommend books to the libraries. To facilitate decision-making in book acquisition, this study aimed to develop a method to determine the ranking of the recommended books based on the recommender network. Design/methodology/approach The recommender network was conducted to establish relationships among book recommenders and their similar readers by using circulation records. Furthermore, social computing techniques were used to evaluate the degree of representativeness of the recommenders and subsequently applied as a criterion to rank the recommended books. Empirical studies were performed to demonstrate the effectiveness of the proposed ranking system. The Spearman’s correlation coefficients between the proposed ranking system and the ranking obtained using reader circulation statistics were used as performance measure. Findings The ranking calculated using the proposed ranking mechanism was highly and moderately correlated to the ranking obtained using reader circulation statistics. The ranking of recommended books by the librarians was moderately and poorly correlated to the ranking calculated using reader circulation statistics. Practical implications The book recommender can be used to improve the accuracy of book recommendations. Originality/value This study is the first that considers the recommender network on library book acquisition. The results also show that the proposed ranking mechanism can facilitate effective book-acquisition decisions in libraries.

Sustainability intention: mediator of sustainability behavioral control and sustainable entrepreneurship

2020 ◽  
Vol 16 (2) ◽  
pp. 81-95 ◽  
Author(s):  
Saadat Nakyejwe Lubowa Kimuli ◽  
Laura Orobia ◽  
Humphrey Muki Sabi ◽  
Clive Katiba Tsuma
Keyword(s):  
Small Businesses ◽  
Design Methodology ◽  
Behavioral Control ◽  
Correlation Coefficients ◽  
Mediation Effect ◽  
Cross Sectional ◽  
Sustainable Entrepreneurship ◽  
Content Type ◽  
Correlational Data ◽  
The Relationship

PurposeThe purpose of this paper is to report results of a study carried out to establish the mediation effect of sustainability intention in the relationship between sustainability behavioral control and sustainable entrepreneurship.Design/methodology/approachThis study is cross sectional and correlational. Data were collected through a questionnaire survey of 384 small businesses. Data were analyzed through correlation coefficients and linear regression using Statistical Package for Social Sciences and the Medgraph program.FindingsThe results suggest that sustainability intention partially mediates the relationship between sustainability behavioral control and sustainable entrepreneurship. Results further indicate that sustainability behavioral control and sustainability intention are significant predictors of sustainable entrepreneurship.Originality/valueThis study provides an initial empirical evidence on the mediation effect of sustainability intention in the relationship between sustainability behavioral control and sustainable entrepreneurship. To the researcher's knowledge, no study had been conducted on such an interesting topic using evidence from a developing country such as Uganda.

IMPROVEMENT OF SPRING DURUM WHEAT SELECTION METHODOLOGIES UNDER CLIMATE CHANGE CONDITIONS

1970 ◽  
pp. 33-36
Author(s):  
А. I. Grabovets ◽  
V. P. Kadushkina ◽  
S. А. Kovalenko
Keyword(s):  
Grain Yield ◽  
Durum Wheat ◽  
Correlation Coefficient ◽  
Harvest Index ◽  
Unit Area ◽  
Correlation Coefficients ◽  
Chemical Mutagenesis ◽  
Main Method ◽  
The Relationship ◽  
Selection Of

With the growing aridity of the climate on the Don, it became necessary to improve the methodology for conducting the  breeding of spring durum wheat. The main method of obtaining the source material remains intraspecific step hybridization. Crossings were performed between genetically distant forms, differing in origin and required traits and properties. The use of chemical mutagenesis was a productive way to change the heredity of genotypes in terms of drought tolerance. When breeding for productivity, both in dry years of research and in favorable years, the most objective markers were identified — the size of the aerial mass, the mass of grain per plant, spike, and harvest index. The magnitude of the correlation coefficients between the yield per unit area and the elements of its structure is established. It was most closely associated with them in dry years, while in wet years it decreased. Power the correlation of the characteristics of the pair - the grain yield per square meter - the aboveground biomass averaged r = 0.73, and in dry years it was higher (0.91) than in favorable ones (0.61 - 0.70) , between the harvest and the harvest index - r = 0.81 (on average). In dry years, the correlation coefficient increased to 0.92. Research data confirms the greatest importance of the mass of grain from one ear and the plant in the formation of grain yield per unit area in both dry and wet years. In dry years, the correlation coefficient between yield and grain mass per plant was on average r = 0.80; in favorable years, r = 0.69. The relationship between yield and grain mass from the ear was greater — r = 0.84 and r = 0.82, respectively. Consequently, the breeding significance of the aboveground mass and the productivity of the ear, as a criterion for the selection of the crop, especially increases in the dry years. They were basic in the selection.

scholarly journals Vulnerable adults in police custody

2019 ◽  
Vol 22 (1) ◽  
pp. 5-8
Author(s):  
Ian Cummins
Keyword(s):  
Design Methodology ◽  
Research Literature ◽  
Police Custody ◽  
England And Wales ◽  
Content Type ◽  
Increased Risk ◽  
Vulnerable Adults

Purpose The purpose of this paper is to discuss the recent National Appropriate Adult Network (NAAN) report on the role of the appropriate adult. Design/methodology/approach This paper is based on the NAAN report and a review of relevant policy and research literature. Findings There to Help 2 highlights that there are still significant gaps in the provision of appropriate adult schemes across England and Wales. These gaps potentially place vulnerable adults at increased risk. Originality/value This paper is a review of recent research.

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