scholarly journals Morphometric and meristic character variability and relationships among populations of Boops boops (L.) from four marine stations along the Tunisian coast

2021 ◽  
Vol 29 (1) ◽  
pp. 13-28
Author(s):  
Mouna Ben Labidi ◽  
Hassen Allaya ◽  
Adel A. Basyouny Shahin ◽  
Jean-Pierre Quignard ◽  
Monia Trabelsi ◽  
...  
Keyword(s):  
Cluster Analysis ◽  
Morphological Differentiation ◽  
Meristic Characters ◽  
Morphometric Characters ◽  
Tunisian Coast ◽  
Physico Chemical ◽  
Clear Differentiation ◽  
And Cluster Analysis ◽  
The Impact ◽  
Boops Boops

Abstract The variability of 14 morphometric and seven meristic characters of Boops boops (L.) collected at four stations along the Tunisian coast was examined in 518 samples ranging from 126 to 206 mm in total length and 37 to 78 g in total weight. Statistical analysis of both sets of characters showed significant variation among the four populations in 13 (92.9%) morphometric and four (57.1%) meristic characters. CVA and cluster analysis of the morphometric characters revealed four groups corresponding to four populations, with 95.36% correct classifications of individuals to their populations of origin. However, CVA and cluster analysis of the meristic characters showed a reticulate relationship among the four populations, as there was clear differentiation between those in Monastir and Zarzis and an overlap between those in Bizerte and Kelibia, with only 51.75% of individuals correctly classified to their respective populations. This morphological differentiation among the populations from the four stations was attributed to the differences in the physico-chemical water properties at these stations. However, further studies are needed on the impact of environmental factors and diet at these stations on the morphological population structure of B. boops to better understand the contribution of environmental conditions to morphological variation.

Remote communication in Scrum teams – a COVID-19 preventive measure or work time optimisation?

e-mentor ◽  
2021 ◽  
Vol 92 (5) ◽  
pp. 81-90
Author(s):  
Kamil Brodnicki ◽  
Keyword(s):  
Principal Component Analysis ◽  
Cluster Analysis ◽  
Principal Component ◽  
Preventive Measure ◽  
Remote Work ◽  
Remote Communication ◽  
Work Time ◽  
Research Material ◽  
And Cluster Analysis ◽  
The Impact

The article presents the impact of remote work, resulting from the COVID-19 pandemic, on the functioning of Scrum teams. Attempts have been made to analyse the positive and negative aspects of remote work. The article also looks at the impact of remote work on the level of communication and efficiency of Scrum teams. For this purpose, the author conducted research on a sample of 40 organisations that declared to use Scrum methodology, using 187 questionnaires as the research material. The study was carried out at the turn of April and May 2021 and was carried out using the CAWI technique. The obtained results were analysed using the Principal Component Analysis and Cluster Analysis methods, and enable defining a picture of an organisation’s readiness to work remotely. In addition, they also allowed for an assessment of how the infrastructure used for remote work communication translates into the organisation of Sprint meetings. This paper presents conclusions aimed at counteracting the observed irregularities detected during the tests. At the end, the author proposes solutions that could improve communication within Scrum teams, with remote work in mind.

The impact of ethnicity on luxury perception: the case of Singapore’s Generation Y

2016 ◽  
Vol 28 (2) ◽  
Author(s):  
Giuseppe Timperio ◽  
Kay Chuan Tan ◽  
Luciano Fratocchi ◽  
Stefano Pace
Keyword(s):  
Cluster Analysis ◽  
Design Methodology ◽  
Global Market ◽  
Luxury Brands ◽  
Value Perception ◽  
Singapore Chinese ◽  
And Cluster Analysis ◽  
Luxury Market ◽  
The Impact ◽  
Practical Implications

Purpose This study investigates Singaporean millennials’ attitudes toward luxury brands. The research focuses on the financial, functional, individual, and social dimensions of luxury value perception and whether ethnicity influences these dimensions. Design/methodology/approach The research measures luxury value perception among millennials of the three main ethnic groups in Singapore (Chinese, Indians, and Malays) via more than 200 questionnaires. Data were analyzed through Kruskal-Wallis non-parametric ANOVA and cluster analysis. Findings Luxury value perception does not vary across ethnicity, with the exception of the financial value dimension. Four market segments of young luxury consumers in Singapore are identified and profiled. These segments do not differ in terms of ethnicity. Research limitations/implications Millennials are an evolving and moving population segment, and thus longitudinal analyses would be useful to develop a more comprehensive understanding of this segment. Practical implications Ethnicity does not affect luxury value perception. The results of the cluster analysis suggest that luxury companies should address the millennials as a global target sharing the same luxury value perception. At the same time, luxury companies can emphasize some different aspects (i.e., the financial dimension) of their value offer. Originality/value The research studies the most interesting market for luxury brands—millennials—in a fast-growing luxury market. It adds knowledge to the previous literature on luxury value perception. This research can guide managers to devise suitable marketing strategies addressing the millennials segment as a global market that has the same set of luxury values worldwide.

Land-Mark based morphometric and meristic variations in two congeneric hilsha population, Tenualosa ilisha and Tenualosa toli from Bangladesh water bodies

2020 ◽  
Vol 6 (2) ◽  
pp. 265-282
Author(s):  
Mithun Das ◽  
Md Mahiuddin Zahangir ◽  
Fatema Akhter ◽  
Md Main Uddin Mamun ◽  
Md Moudud Islam
Keyword(s):  
Function Analysis ◽  
Morphological Characteristics ◽  
Morphological Differentiation ◽  
Principal Component ◽  
Meristic Characters ◽  
Morphometric Measurements ◽  
Network Measurements ◽  
Morphometric Characters ◽  
Marine Population ◽  
Tenualosa Ilisha

The morphometric characters are effectively used for the better differentiation among the fish population and sustainable management. The appraisal of the natural population stock and morphological variation within and between two hilsha species (Tenualosa ilisha and Tenualosa toli) from three different habitat (Coastal, riverine and marine) of Bangladesh, were investigated by applying the land mark based morphometric and meristic variation measurement methods. All data were adjusted and Univariate ANOVA, where discriminant function analysis (DFA) and principal component analysis (PCA) exhibited the divergences in eight morphometric measurements and eight truss network measurements among the three stocks of T. ilisha. The 1st DFA accounted for 89.8% & 87.4% and the second DFA resolved 10.2% and 12.6%, respectively in morphometric characteristics variation among the group studied. Scattered plotting from PCA and dendogram from cluster analysis (CA) revealed that, the river habitants were morphologically different from the coastal and marine population. Twelve of fifteen morphometric measurements and thirteen of fourteen truss network measurements showed significant differences between T. ilisha and T. toil with significant variation in meristic characters. PCA revealed 89.23% and 88.29% in case of morphometric and truss measurement respectively confirmed high degree of variations in morphological characteristics between two species. Overall, our results based on morphometrics with truss measurements together provide useful information about the morphological differentiation which will be helpful for sustainable exploration and effective management for these two species. Asian J. Med. Biol. Res. June 2020, 6(2): 265-282

Impact of Urban Ambiance on the Productivity of the Built Environment Using Cluster Analysis

2020 ◽  
pp. 126-144
Author(s):  
Saurav Dixit
Keyword(s):  
Cluster Analysis ◽  
Built Environment ◽  
Relative Importance ◽  
Urban City ◽  
Importance Index ◽  
Number Of Factors ◽  
The World ◽  
And Cluster Analysis ◽  
The Impact ◽  
The City

Productivity is the key measure of success and efficiency of any process or activity, and it is dependent on a number of factors. The ambiance of cities and the use of latest technology and environment also affect the productivity of the residents working in the city. The objective of this chapter is to identify the attributes of urban ambiance from the literature review and to analyse the impact of satisfactory urban/city ambiance on the productivity of the built environment. The methodology adopted for the study is to collect the data using a structured questionnaire survey on the impact of urban ambiance on the productivity form the different cities of the world. The collected data shall be analysed using reliability analysis, relative importance index, exploratory factor analysis, and cluster analysis. The finding of the study shall provide an understanding of urban ambiance on the productivity of the built environment and the ways and means to improve the situation.

scholarly journals Morphological Similarity Analysis of Elite Rice Varieties Released in 1980–2011

2018 ◽  
Vol 24 (1) ◽  
pp. 31
Author(s):  
Trias Sitaresmi ◽  
Nani Yunani ◽  
Nafisah Nafisah ◽  
Satoto Satoto ◽  
Aan A. Daradjat
Keyword(s):  
Principal Component Analysis ◽  
Cluster Analysis ◽  
Genetic Relationship ◽  
Principal Component ◽  
Component Analysis ◽  
Yield Potential ◽  
Rice Varieties ◽  
Irrigated Rice ◽  
And Cluster Analysis ◽  
The Impact

<p>High acceptance of farmer to variety with have similar to IR64 type has led to almost all new varieties always be assessed based on their degree of similarity with IR64. Closely relations between elite upland varieties may contribute to the stagnation of yield potential and also give the impact un-durable of the resistance to pest and diseases. The aim of this study was to elucidate the morphology similarity kinship characters of elite rice varieties which were released from 1980 to 2011. The study was conducted in September–January 2012 in Indonesian Center for Rice Research field experiment. The material consisted of 46 rice varieties representing the released varieties from 1980–2011. The material was grown in 2 m × 5 m of plot size with 3 replications. Observations were conducted on qualitative and quantitative characters based on UPOV descriptors. Data were analyzed by Principal Component Analysis and Cluster Analysis. Principal component analysis revealed 40 components with 79,86% of cumulative variation that was used to determine the genetic relationship by cluster analysis. Based on the principal component analysis and cluster analysis, irrigated rice varieties released before and in 2000 and after 2008 (Inpari group) tend to be one big group and have a high phenotypic similarity. While the upland rice varieties tend to spread or were grouped in small groups. This high similarity suggested that the irrigated rice varieties have a close genetic relationship, which is derived from Ciherang or IR64.</p>

Morphological Differentiation of Lake Sturgeon (Acipenser fulvescens) from the St. Lawrence River and Lac des Deux Montagnes (Quebec, Canada)

1992 ◽  
Vol 49 (9) ◽  
pp. 1959-1965 ◽  
Author(s):  
Sylvie Guénette ◽  
Eric Rassart ◽  
Réjean Fortin
Keyword(s):  
Multivariate Analyses ◽  
Morphological Differentiation ◽  
Lake Sturgeon ◽  
Acipenser Fulvescens ◽  
Meristic Characters ◽  
Morphometric Characters ◽  
Saint Louis ◽  
Discriminant Analyses ◽  
St Lawrence River ◽  
River Fish

We investigated the degree of morphological differentiation of lake sturgeon (Acipenser fulvescens) from the St. Lawrence River (Lacs Saint-Pierre and Saint-Louis and the river itself downstream from Lac Saint-Pierre) and from Lac des Deux Montagnes. Forty-one morphometric characters (traditional and truss network) and two meristic traits were used on 200 sturgeon (890–1010 mm total length) from five sites. The study of the meristic characters showed a difference of 1.5 gill rakers between Lac Saint-Louis sturgeon and those from Lac Saint-Pierre and Lac des Deux Montagnes although the range was identical in all groups. Principal components and discriminant analyses performed on morphometric characters showed that Lac des Deux Montagnes sturgeon differ markedly from the St. Lawrence River fish by their proportionally higher and longer head (correct reclassification 89%). The more discriminant descriptors show a difference ranging from 4 to 16 mm between Lac des Deux Montagnes fish and those from the St. Lawrence River. The multivariate analyses also revealed significant morphometric differences between fish in different sectors of the St. Lawrence River. However, the absolute differences are rather tenuous and are not adequate to designate separate stocks based solely on morphology.

scholarly journals Groundwater Quality of Southeastern Brazzaville, Congo

2010 ◽  
Vol 7 (3) ◽  
pp. 861-869 ◽  
Author(s):  
Matini Laurent ◽  
Moutou Joseph Marie
Keyword(s):  
Cluster Analysis ◽  
Factor Analysis ◽  
Groundwater Quality ◽  
Water Samples ◽  
Anthropogenic Activities ◽  
Fluoride Concentration ◽  
Domestic Wastewater ◽  
Total Hardness ◽  
And Cluster Analysis ◽  
The Impact

The groundwater in southeastern Brazzaville (Congo) was analyzed for their fluoride contents and others related parameters in rainy season. The fluoride contents in water samples (wells and spring) can be gather in three classes in the study area: low, optimal, high. Fluoride concentration in water samples presents a low significant correlation with Ca2+. This suggests that fluoride in the groundwater come from fluoride-bearing minerals such as CaF2(fluorite). Maps were drawn to show the geographical distribution of EC, Ca2+, Mg2+and F-. Factor analysis and cluster analysis were applied to the dataset. Factor analysis resulted in four factors explained 76.90% of the total groundwater quality variance. Factor 1 (hardness of the groundwater) includes total hardness, the concentration of K+, Ca2+and pH. Factor 2 (low mineralization of the groundwater) includes concentrations of TDS, Cl--, SO42+and EC. Factor 3 (anthropogenic activities with the impact of agricultural fertilizers, farming activities, domestic wastewater, septic tanks) includes concentrations of Na+and NO3-. Factor 4 (weathering of calcium minerals) includes concentrations of F-. For cluster analysis, Ward’s method and the Euclidean distance were used. The findings of the cluster analysis are presented in the form of dendrogram of the well water sites (cases). The discriminating parameters between clusters have been highlighted from the Student test. In majority, they are in accordance with those highlighted by factor analysis.

The limit of the contemporary financial system in Russia

2020 ◽  
Vol 16 (7) ◽  
pp. 1223-1245
Author(s):  
V.V. Smirnov
Keyword(s):  
Cluster Analysis ◽  
Foreign Currency ◽  
Financial System ◽  
Descriptive Statistics ◽  
High Tech ◽  
Monetary Aggregate ◽  
Internal System ◽  
Monetary Relations ◽  
And Cluster Analysis ◽  
Structural Preservation

Subject. The article focuses on the modern financial system of Russia. Objectives. I determine the limit of the contemporary financial system in Russia. Methods. The study is based on methods of descriptive statistics, statistical and cluster analysis. Results. The article shows the possibility of determining the scope of the contemporary financial system in Russia by establishing monetary relations as the order of the internal system and concerted operation of subsystems, preserving the structure of the financial system, maintaining the operational regime, implementing the program and achieving the goal. I found that the Russian financial system correlated with the Angolan one, and the real scope of the contemporary financial system in Russia. Conclusions and Relevance. As an attempt to effectively establish monetary relations and manage them, the limit of the contemporary financial system is related to the possibility of using Monetary Aggregate M0 to maintain the balance of the Central Bank of Russia. To overcome the scope of Russia’s financial system, the economy should have changed its specialization, refocusing it on high-tech export and increasing the foreign currency reserves. This can be done if amendments to Russia’s Constitution are adopted. The findings expand the scope of knowledge and create new competence in the establishment of monetary relations, order of the internal system and concerted interaction of subsystems, structural preservation of the financial system and maintenance of its operational regime.

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