Factorial Correspondence Analysis Research Articles

Transition to emergency distance learning amid COVID-19 pandemic through the lens of students’ subjective experience of the transformation of university learning environment

The aim of the current research was to identify the students’ subjective experience of the transforming learning environment according to the perceived opportunities provided by the digital learning environment of the university.Methodology and research methods. The research methodological framework is based on leading theories related to the students’ behaviour in digital learning environments (DLE). The synthesis of the theories considered made it possible to propose a theoretical model of the students’ subjective experiences in relation to DLE of the university, which was operationalised by constructing a questionnaire that reveals the students’ perception of the main components of the DLE. The following methods were employed: a questionnaire on alienation from study, a method for the assessment of students’ subjective experiences, and the Academic Motivation Scale (AMS). Previous distance learning experience was identified by the use of self-rating scales. The survey results were analysed qualitatively and quantitatively using the Cronbach Alpha coefficient, the Spearman’s rank correlation coefficient, and the Pearson’s chi-squared test. The authors also used factorial ANOVA, correspondence analysis and multiple linear regression analysis. Statistical calculations were performed using Statistica ver. 7.0 (Statsoft). 4558 students from 30 Russian universities (located in 23 subjects of Russia) took part in the research.Results. The present research demonstrated a change in the usual forms of learning activities carried out by students in the distance learning process. Distance learning is presented to students as a basis for meeting the need for subjectivity of their personality, the ability to initiate their own learning activities. Students feel that there are sufficient conditions and resources for mastering digital learning tools, and they easily adapt to the digital environment of their universities. However, in this process, the student acts as an atomised subject, weakly interacting with other people and not feeling a sense of interpersonal closeness and connectedness with others.The research findings revealed that the perceived characteristics of the DLE of the university have a direct impact on the inner states of students in the learning process. The formation of a stable social environment within the framework of the DLE, which ensures harmonious interaction and communication between the subjects of the educational process, contributes to achieving an optimal balance of students’ subjective experiences, reduces the risk of negative inner states that lead to learning demotivation, the experience of alienation from study, the growing sense of meaninglessness and emptiness in the learning process.Scientific novelty. The developed model of the influence of DLE on the subjective experiences of students in the emergence distance learning made it possible to identify significant DLE components, which determine the motivational and emotional states of students, and to establish student ratio to achieve the optimal balance of subjective experiences.Practical significance. The empirically based findings presented in this study can be used to design the DLE of the university, to determine the directions of work on the formation of psychological readiness of students for distance learning.

Determinants of the Adoption of Dashboards in SMEs

The objective of this research is to highlight the factors driving the structural and behavioural contingencies to the adoption of dashboards by small and medium sized enterprises (SMEs) in the Cameroonian context. Using data collected from 314 SMEs, we conducted an exploratory analysis, in order to investigate the factors that could have an influence on the use of dashboards and a multiple correspondence factorial analysis in order to identify the characteristics of SMEs using dashboards. On the other hand, a binary logistic regression was done to unveil the factors that stand behind the usage of dashboards in Cameroonian SMEs. Our findings indicate that the formal nature of the SME, the power delegation, the presence of an experienced leader, the pressure of foreign competition, the age of the company, the use of follow-up software in organizational processes and the implementation of a system to reward the employees when they achieve positive results, are the factors that enable the adoption of the dashboard.

Ethnobotanical Uses of Non-cultivated Edible Fruit Species in the Department of Oussouye (South Senegal)

Forests are an immense reservoir of biological resources and provide the local population with subsistence needs, especially for edible fruits. This study contributes to a better knowledge of the use modes of non-cultivate edible plant species in the area of Kasa, traditional name for the department of Oussouye. Ethnobotanical surveys, based on an interview guide, oral discussions and direct observations were conducted among 178 people from the department of Oussouye, stronghold of the Diola ethnic group. A factorial correspondence analysis highlighted the relationship between species and categories of use. The frequency of citation, informant consensus factor and use value showed the socio-cultural importance of the species. The data collected identified 62 edible species divided into 31 families and 54 genera. The fruit species inventoried are used for different purposes. They are a food source with 62% of citations, energetic 19%, technological 14%, medicinal 13%, cultural 6% and agronomic 2% for the populations. Two species stand out for their high use value factor (UVt). These were Elaeis guineensis (12.24) and Borassus aethiopum (7.56). In addition to their use value, species such as Mangifera indica, Neocarya macrophylla, Parkia biglobosa, Anacardium occidentale, Ceiba pentandra, Parinari excelsa, stood out for their categories and organs used. These results inform us about the level of use of fruit species for different needs and open up avenues for research in sustainable management of this resource with the aim of reducing poverty.

Use of local knowledge for contributing to the conservation of Caesalpinia bonduc (L.) Roxb in southern Benin (West Africa)

Natural resources such as medicinal plants are important in the livelihood systems of many local people around the world. The high anthropogenic pressure on these species lead to their progressive disappearance. This is the case of Caesalpinia bonduc, a medicinal plant widely used in southern Benin but already extinct in the wild. The remaining individuals can only be found in agroforestry systems and home gardens. Therefore, it is necessary to assess the factors responsible of the decline of the species for its sustainable conservation. This study aimed to assess traditional knowledge, perceptions and strategies for an effective management of the species in southern Benin. A semi-structured interview was conducted with 602 household heads randomly chosen from 19 localities. The fidelity level (FL), index value related to useful organs (IVO) and Overall ethno-botanical use value (OUV) of the species were estimated. To describe ethnic groups-related differences, a principal component analysis (PCA) was implemented on OUV. Chi-Square test was used to check the dependence between socio-demographical characteristics of the respondents and local perceptions and strategies. A factorial correspondence analysis (FCA) was then performed on the citation frequencies of different variables to describe the relationship between ethnic groups and local perceptions and strategies. In total, 20 use properties were reported for the species with 10 previously undocumented uses of the species. The roots are the most used organ with IVO = 50%, followed by the leaves (IVO = 45%). The species is most used in traditional human medicine (FL = 100%). A strong relationship was found between ethnic groups and use of the species but also between ethnic groups and perceptions and management strategies. Respondents acknowledged that the species has decreased (80% of them) and even has disappeared (18%) in the wild. According to the informants, the main causes of the decline of the species are roots overexploitation (53.7%), intensive use in traditional pharmacopoeia (37%) and agriculture expansion (32.6%). Respondents also acknowledged that there is an urgent need for the species conservation (96%). Reduce intensity of harvesting plant parts, cultivating the species in nurseries, planting and protecting seedlings in fields were cited as methods of conserving the species. This study provides a precious contribution to the conservation of C. bonduc in southern Benin. Therefore, we recommend for any actions aiming to rehabilitate the species in its natural stands, local people’ priorities and knowledge should be considered.

Genetic diversity of the free-living population of Przewalski's horses in the Chernobyl Exclusion Zone

The present study is aimed at evaluating the genetic diversity, genetic status and the extent of hybridization with the domestic horse for the Przhevalski’s horse (Equus ferus przewalskii Poliakov 1881) population free-ranging in the territory of the Chernobyl Exclusion Zone (CEZ) in Belarus and Ukraine. The sample size included 12 individuals (10 sampled in the Belarusian part of the CEZ and 2 from the Ukrainian part of the CEZ). Ten microsatellites recommended by the International Society for Animal Genetics (ISAG) for horse genetic status and pedigree determination were used as markers in this study. The fragment analysis data obtained utilising this microsatellite panel determined that two individuals from Belarus possess no allelic variants typical for Przhevalski’s horse. Most of the other individuals presented diagnostically valuable allelic variants. Demographic history analysis for the population did not indicate any drastic population shrinkage events in the population’s recent history. The studied population is characterised by heterogeneous population structure with signs of inbreeding (0.21 %), intermediate level of genetic diversity (He = 0.63) and allelic richness (5.15), possesses 16 unique alleles among 2 microsatellite loci and valuable alleles for loci HMS3 and HMS7 (46.4 and 67.9 % specific alleles for Przhevalski’s horse, respectively). Genetic structure evaluation for the population was performed via Bayesian population structure analysis and factorial correspondence analysis (FCA), which indicated the presence of intrapopulation genetic subdivision. Taking into account the obtained indicators of genetic diversity, we may conclude on the relatively favourable status of Przewalski’s horse in the exclusion zone with good potential for the long-term existence of the species population in the wild. In order to minimise inbreeding effects and the risk of a decline in genetic diversity in the population of Przewalski’s horse of the exclusion zone, as well as to increase the value of this free-living group to preserve the gene pool of the species as a whole, it is necessary to provide detailed genetic monitoring of the livestock’s state, as well as develop a regional population management plan, including measures aimed to minimise the possibility of further hybridisation of wild horses with domestic ones.

Facteurs influençant l’efficacité des recettes galactogènes chez les vaches Borgou élevées en milieu réel au Bénin - Factors influencing the effectiveness of galactogenic recipes in Borgou cows reared in a real environment in Benin

Background: Ethnoveterinary medicine is an integral part of the cultural heritage associated with traditional medicine in Africa, where plants and natural products treat the ailments suffered by animals. Many plants are used to improve the dairy performance of local cows. The study assesses factors that influencing the effectiveness of galactogenic recipes administered to Borgou cows raised in real conditions in Benin.Methodology: A survey was carried out in the middle of the rainy season (April to September 2019), using a "focus group" to classify the plants involved in galactogenic recipes. The results obtained were subjected to a Factorial Correspondence Analysis (AFC) followed by a multiple regression carried out on qualitative data in particular, the organs of the plants used, the modes of use, the additives used and the administration route of recipe.Results: The Factorial Correspondence Analysis (CFA) carried out on the methods of choosing the plants given relative to the zones showed that the correlation between these two variables was explained at 66.69% (Figure 1) by the first two axes. Therefore, the involvement of species in revenue depends on their availability in the study area. Indeed, the correspondences resulting from the projection of the different plants used in galactogenic preparations and the different assessment methods of agro-breeders (Efficient, moderately efficient, and fair) in the AFC axis systems (Figure 1) showed that in the communes of Gogounou and Kalalé, Arachis hypogaea (L.) and Euphorbia balsamifera Aiton were the most effective species. On the other hand, in Djidja, the most efficient plant was Gardenia aqualla Stapf & Hutch.For each species, the results of the multiple regressions carried out with the organs involved in the preparation of galactogenic recipes are shown in Table 1. The organs exhibiting a positive coefficient and a probability less than 0.05 are those which positively influenced milk production. Note that for the species presented in the above table, one or more organs can be used in recipes presumed to be galactogenic by traditional breeders. But the effectiveness of the recipe depends on the type involved in its constitution. It is interesting to note that in certain species: Aganope stuhlmannii (Taub.) Adema, Vitellaria paradoxa C.F.Gaertn, Calotropis procera subsp. hamiltonii (Wight) Ali, Khaya senegalensis (Desv.) A.Juss, Vigna unguiculata (L.) Walp, Gardenia aqualla Stapf & Hutch, Daniellia oliveri (Rolfe) Clapier. Et Dalziel, Saba comorensis (Bojer ex A.DC.) Pichon and Vitellaria paradoxa C.F.Gaertn, several organs positively impacted milk production. However, for the same recipe, the association of several organs in its constitution has a depressive effect on milk production. Apart from the number of organs involved in the constitution of the recipes, the method of preparation associated with each plant species impacted the milk production of the cows. Out of the thirteen species (19) which had significant effects with milk production, the results of Table 2 indicate that the modes of use were successively ranked as follows (Table 2): Maceration> decoction> powder> infusion were cited. Among the species which have undergone maceration: Budgunnia madagascariensis (Desv.) JHKirkbr. & Wiersema, Arachis hypogaea (L.), Euphorbia balsamifera Aiton and Curcubita maxima (L.) have been mentioned. Species such as: Gardenia aqualla Stapf & Hutch, Sorghum bicolor (L.) Moench and Vittelaria paradoxa C.F.Gaertn could only be effective if used as a decoction. The effectiveness of Vigna unguiculata (L.) Walp on milk production could only be obtained by trituration for one hour. As for Saba comorensis (Bojer ex A.DC.) Pichon, the method of use was only very effective by infusion (P <0.001).Among the ingredients involved in the recipes, only salt and potash appeared to be significant (P <0.05) on the milk production of cows. In addition, the results of the work indicated that the administration of oral preparations positively influenced milk production (P <0.05).Conclusion: The study shows that agro-pastoralists have a perfect knowledge of the different factors that influence the effectiveness of galactogenic recipes. However, some plant species involved are becoming rare because of the development of crop fields to the detriment of forest cover. Most effective recipes involve the roots. This poses real problems for the ecology of the environment and the development of the species involved. Experiments are underway to confirm the results of the surveys.Keywords: Indigenous knowledge; Galactogenic; plants; affecting; production; milk; organs; Bénin.

Algae in Acid Mine Drainage and Relationships with Pollutants in a Degraded Mining Ecosystem

Acid mine drainage represents an extreme environment with high concentrations of potentially toxic elements and low pH values. These aquatic habitats are characterised by harsh conditions for biota, being dominated by acidophilic organisms. The study site, São Domingos mine, located in one of the largest metallogenetic provinces in the world, the Iberian Pyrite Belt, was closed without preventive measures. To identify the algae species and understand the relationships with abiotic parameters of the ecosystem, water and biological material were collected and analysed. Digital terrain models were obtained with an unmanned aerial vehicle for geomorphological and hydrologic characterisation of the mine degraded landscape. The results show two types of algal colours that seem to represent different degrees of photosynthetic activity. Optical and scanning electron microscopy revealed 14 taxa at the genus level, divided into eight classes. The genus Mougeotia is the most abundant multicellular algae. With respect to unicellular algae, diatoms are ubiquitous and abundant. Abiotic analyses expose typical features of acid mine drainage and support an inverse relationship between chemical contamination and biological diversity. Factorial correspondence analysis indicates three groups of attributes and samples by their relationship with specific toxic elements. This analysis also suggests a close association between Spirogyra and Pb, together composing a structurally simple ecosystem. The highest contamination in the river system is related to the hydrologic patterns obtained from photogrammetric products, such as the digital surface model and flow map accumulation, indicating the input of leachates from the section having the finest sulfide-rich wastes. Information about the algae community and their association with flow patterns of toxic elements is a relevant tool from a biomonitoring perspective.

Altitudinal Distribution of Calliphoridae (Diptera: Insecta) on the Eastern Slope of the Eastern Mountain Range in the Andean Amazon, Colombia

Objetive. The objective was to determine the altitudinal distribution of Calliphoridae (Diptera) on the eastern slope of the Eastern Mountain Range in the Andean Amazon, Colombia. Scope. Promote knowledge of the diversity of Calliphoridae in the Colombian Andean Amazon, which can be used as forensic indicators in this region of the country. Methodology. The study was done in an altitudinal gradient from 250 to 2,500 meters. During March, April, and June (high rainy season) and September, November, and December (low rainy season), using Van Someren-Rydon traps baited with decomposing fish. Results. A total of 4,437 specimens of Calliphorid were collected, distributed in nine genera and 14 species; the most abundant species were Chloroprocta idioidea (Robineau-Desvoidy), Chrysomya albiceps (Wiedemann), and Cochliomyia macellaria (Fabricius). ANOVA with a post-hoc Tukey HSD test showed that the two sampling seasons and the five sampling stations were not statistically different. Species accumulation curves were used to measure sampling effort and a rarefaction curve based on the number of specimens was used to compare species richness between sampling stations. Shannon diversity index showed that the most diverse altitude was Macagual at 250 meters (H = 2.39), and the Simpson index showed that the locality with the highest dominance was Los Lirios at 1400 meters (D = 1.33). Species showed specific altitudinal range distribution based on the results from a Factorial Correspondence Analysis and on an altitude range grouping using cluster analysis. Conclusions. The results showed that the distribution and diversity ofthe Calliphoridae species the eastern slope of the Eastern Mountain Range in the Colombian Andean Amazon are strongly influenced by weather conditions.

Contribution of Avenue Trees Planted Along Managed Roadways in the Provision of Ecosystem Services to the Population of the Municipality of Sèmè-Podji in Benin

The plant needs of city dwellers sometimes force them to make use of the local plant diversity of which the avenue trees are a part. In the municipality of Sèmè-Podji, avenue trees provide social and environmental advantages to residents in daily practices. However, they are poorly valued and subjected to anthropogenic pressures. The objective of this study is to analyze the contribution of avenue trees in the provision of ecosystem services to the populations along roadways of the municipality of Sèmè-Podji. The methodological approach used is based on counting the forms of harvesting from the different species of trees over 26 kilometers of developed streets. Then, semi-structured interviews are carried out with 260 peoples, divided into 4 socio-professional categories. The Pearson correlation test was used to assess the agreement between the opinions of the respondents, then the prioritization matrix and the factorial correspondence analysis were used to assess the involvement of species and organs in the availability of ecosystem services. The results obtained reveal 7 forms of use classified into 4 categories of ecosystem services, confirmed by the opinions of the socio-professional categories with high degree of consensus between traders and craftsmen (r = 0.955; p = 0.001). The usage values vary between 0.53 (regulation service) and 0.04 (support service). However, supply services are the most cited and come from the species <i>Coccoloba uvifera</i>, <i>Terminalia catappa</i>, <i>Cocos nucifera</i>, <i>Manguifera indica</i> and <i>Eleais guineensis</i>. Taking into account the information provided by the populations on ecosystem services could facilitate the integration of alignment plantations in the sustainable development of this city.

INVESTIGANDO APROXIMAÇÕES ENTRE TEXTOS DE DIVULGAÇÃO CIENTÍFICA E LIVROS DIDÁTICOS DE QUÍMICA

Com o objetivo de promover a utilização de Textos de Divulgação Científica (TDC), por professores de Química da Educação Básica, este trabalho buscou analisar afinidades existentes entre os TDC publicados na Revista Ciência Hoje, selecionados por Cantanhede (2012) e Sousa, Cantanhede e Cantanhede (2020) para o conteúdo Ligações Químicas, e as discussões sobre esse conteúdo presentes nos seis Livros Didáticos de Química, indicados pelo Programa Nacional do Livro Didático (PNLD), para o triênio 2018/2020. A análise da afinidade foi realizada pela ferramenta Wordle, a partir da geração de nuvem de palavras, que destaca os termos mais frequentes em um conjunto de palavras, e o software IRaMuTeQ, utilizado para análise qualitativa de dados textuais, a partir da Análise Fatorial por Correspondência (AFC) e análise de Similitude. Os TDC, Por que a água não pega fogo se é formada por dois elementos combustíveis? (Edição 231, out/2006) e Como o enxofre pode se ligar mais de duas vezes ao oxigênio sendo ambos bivalentes? (Edição 276, nov/2010), apresentaram uma afinidade satisfatória com a forma com que o conteúdo Ligações Químicas é discutido nos LD investigados, considerando as nuvens de palavras geradas a partir desses materiais. Os termos de maior destaque nos LD foram: hidrogênio, átomo, substância, elemento, molécula e ligação. Os TDC se utilizam desses termos para fazer menções de significados e explicações dos fenômenos químicos com os termos em destaque nas nuvens. Essas relações entre TDC e LD, podem representar um importante parâmetro para a utilização de TDC em sala de aula e, assim, sustentar discussões de forma contextualizada de conteúdos químicos na Educação Básica.

Social representation of fair price among professional photographers.

We investigated the social representation of fair price of French and English-speaking photographers using the free association method. In two independent studies, we performed a factorial analysis of correspondence of the words provided by the participants as well as a similitude analysis. The results indicated that "fair price" was mainly associated with time, effort and experience level of photographers. Both French- and English-speaking samples made similar associations around the concept of fair price but the order of importance varied. We observed some gender-related differences in both samples, although the relative number of male and female participants must be taken into consideration.

Familiarizando a não-familiaridade: alteridade e dimensão afetiva nas representações sociais de ciganos

O estudo objetivou analisar as representações sociais de ciganos entre não-ciganos da Região Metropolitana da Grande Vitória/Brasil. Com coleta de dados feita através de questionário, participaram do estudo 300 pessoas, com idades entre 10 e 25 anos. Os resultados, analisados por meio da análise fatorial de correspondência e da análise de cluster, evidenciaram quatro conjuntos de representações sobre os ciganos - “Eles são como aqueles outros”, “Eu desconfio e eles me incomodam”, “Nem conheço, mas tenho medo deles”, e “Sou fascinado por aquela cultura diferente” –, e ainda três diferentes tomadas de posição afetiva, orientadas pelo incômodo, ameaça e fascínio. Discute-se a complexidade do processo de familiarização na construção das representações sociais em sua interface com a dinâmica da alteridade.

Like Wings of a Bird: Functional Divergence and Complementarity between HLA-A and HLA-B Molecules.

Human leukocyte antigen (HLA) genes are among the most polymorphic of our genome, as a likely consequence of balancing selection related to their central role in adaptive immunity. HLA-A and HLA-B genes were recently suggested to evolve through a model of joint divergent asymmetric selection conferring all human populations, including those with severe loss of diversity, an equivalent immune potential. However, the mechanisms by which these two genes might undergo joint evolution while displaying very distinct allelic profiles in populations are still unknown. To address this issue, we carried out extensive data analyses (among which factorial correspondence analysis and linear modeling) on 2,909 common and rare HLA-A, HLA-B, and HLA-C alleles and 200,000 simulated pathogenic peptides by taking into account sequence variation, predicted peptide-binding affinity and HLA allele frequencies in 123 populations worldwide. Our results show that HLA-A and HLA-B (but not HLA-C) molecules maintain considerable functional divergence in almost all populations, which likely plays an instrumental role in their immune defense. We also provide robust evidence of functional complementarity between HLA-A and HLA-B molecules, which display asymmetric relationships in terms of amino acid diversity at both inter- and intraprotein levels and in terms of promiscuous or fastidious peptide-binding specificities. Like two wings of a flying bird, the functional complementarity of HLA-A and HLA-B is a perfect example, in our genome, of duplicated genes sharing their capacity of assuming common vital functions while being submitted to complex and sometimes distinct environmental pressures.

Temporal patterns of fish occurrence of the euryhaline sector of a subtropical estuary, southern Brazil

Fish fauna was studied in five sites of the shallow infralittoral of the Paranaguá Bay during the period from October 1999 to September 2000. At each sampling site, fish were sampled with other trawls, salinity and temperature were measured, water samples were taken from the bottom of the water column for determination of dissolved oxygen, dissolved inorganic nitrogen and phosphate. The spatial and temporal behavior of the environmental variables was analyzed by a Principal Component Analysis; Cluster Analysis was used to gather the sampling sites, and Factorial Correspondence Analysis was applied to the most abundant species. Temperature was the most important variable for the distribution of the months, allowing the division of the study period into hot and cold months. The temporal variation in the fish fauna composition was indicated by cluster analysis, with highest percentages of dissimilarity between the sampling sites during hot months. The variation in dissimilarity between the sites occurred due to differences in the number of individuals and species of the catches. The high frequencies of occurrence of Anisotremus surinamensis, Etropus crossotus, Genidens genidens, Micropogonias furnieri and Sphoeroides greeleyi were related to high temperatures. The greatest number of fish and species observed in hot months may be related to the life cycle of many species, which reproduce in warmer months, and whose offspring use estuaries as breeding areas.

Molecular characterization of eight horse breeds in Algeria using microsatellite markers

Abstract. Amine BME, Naima B, Mohammed B, Abdelkader AA, Youssouf HH, Mohammed P, Suheill GSB. 2020. Molecular characterization of eight horse breeds in Algeria using microsatellite markers. Biodiversitas 21: 4107-4115. The Algerian horse population Bar, Origin Barb unknown, Arabian-Barb, Arabian, Thoroughbred (Pur sang); French Trotter, Algerian saddle, and Saddle are under a significant loss of genetic variability. This should be evaluated before any breed conservation and management program. For this purpose, genetic analyzes of diversity and differentiation were carried out on eight breeds horses reared in Algeria with 17 microsatellites. All microsatellite markers were highly polymorphic in all Breeds. A total of 170 alleles from 17 microsatellite loci were detected in 279 horses. The average number of alleles per locus was highest in Arabian-Barb horses (7.88) and lowest in Saddle breed (4.94). The observed heterozygosity interbreeds ranged from 0.685 to 0.625 for Barb and Saddle, while the expected heterozygosity was ranged from 0.746 to 0.678 for Arabian-Barb and Algerian Saddle respectively, the Ho value is lower than that of He value. Genetic diversity between breeds was significant, based on Fst. Three different approaches to assess genetic relationships have been applied; namely, genetic distances, factorial correspondence analysis, and admixture analysis have shown that a significant amount of genetic variation is maintained in populations of native horses and other breeds: the Barb, Arabian-Barb, Barb (Oi). Algerian Saddle and Saddle breeds appear to be the most genetically related and support that there are crosses between these two breeds.

Análise textual com IRaMuTeQ de pesquisas recentes em História da educação matemática no Brasil: um exemplo de Humanidades Digitais

El objetivo de este trabajo es analizar la producción de conocimiento en historia de la educación matemática (HEM) bajo la óptica de las Humanidades Digitales, a partir de tesis de maestría y doctorado realizadas en 2012 y 2017 en Brasil. La muestra está compuesta por 52 tesis y se utilizó el software IRaMuTeQ para el análisis multidimensional de sus resúmenes. El análisis de frecuencia de palabras posibilitó la identificación de temáticas y metodologías; mientras que el análisis factorial de correspondencia posibilitó 1) la contextualización semántica y 2) visualizar las distancias entre los corpus textuales (resúmenes de tesis). En Brasil, la evolución de HEM muestra aumento del número de tesis, diversificación de temáticas y metodologías. En los años analizados la formación de profesores es el principal tema de interés. La hermenéutica de profundidad es el principal referente teórico-metodológico en las tesis de 2017. Los hallazgos evidencian la influencia de los grupos de investigación en las agendas de investigación de las universidades. Los resultados confirman la utilidad de las herramientas de las Humanidades Digitales, específicamente las relativas a la minería de texto, para analizar la evolución de la producción de conocimiento en HEM

Bonne gouvernance participative de la collectivité territoriale et communication publique externe : Quelle relation ?

Good governance has aroused keen interest in the political, economic and social spheres in recent years. In addition, the events in the world today and the crises in several countries clearly show us the importance of this issue, which has become a question of concern to the whole world. Public communication is a primary means of good local governance. It contributes to improving the quality of the public service provided to citizens by strengthening the efficiency, transparency and consistency of public policies. This article aims to highlight this relationship between public communication and good governance. Thus, our mixed methodology is based on a quantitative survey carried out on two samples; a sample of 250 citizens living in the urban municipality of Sidi Ifni and 10 associations active in the same municipality. We use two different sampling methods: empirical sampling for citizens and simple random sampling for associations. Data collection was based primarily on the questionnaire and additional information was obtained through direct interviews with the heads of department of the municipality and the associations’ presidents. For the data analysis, three methods were carried out, first, the univariate analysis, then, the multivariate analysis and finally the factorial correspondence analysis. The main results of this article is that the local population and social associations in the urban municipality are not well informed about the territorial municipality’s activities. In addition, we confirmed that the satisfaction of the local population with the governance of their rulers is dependent on their concerted action in making strategic decisions, among other things, participative management of local budget and the development of the municipal development plan.

El Modelo Mexicano de Formación Dual como modelo educativo en pro de la inserción laboral de los jóvenes en México

El objetivo de esta investigación es identificar la influencia del Modelo Mexicano de Formación Dual (MMFD) como modelo educativo en pro de la inserción laboral de los jóvenes egresados de la educación media superior y superior en México, para lo cual se realiza el análisis factorial de correspondencia para el periodo 2013-2016, a nivel nacional y por entidad federativa. Entre los resultados destaca una relación positiva entre el MMFD y la inserción laboral, donde un mayor escalamiento del MMFD coincide con un decrecimiento de la tasa de desocupación y un incremento en el número de ocupados.

PM10 temporal variation and multi-scale contributions of sources and meteorology in Sfax, Tunisia

The study of PM10 temporal variation for two successive years (2009 and 2010), carried out at the proximity of a crossroad (≈ 41,390 vehicles per day) located in an urban centre in Sfax, Tunisia, showed comparable annual average concentrations (≈ 80 μg/m3). However, monthly and daily average concentration levels have been significantly variable. Moreover, the monthly average concentration levels have revealed almost similar tendencies to those observed in other Mediterranean regions, signalling the highest ones between winter and spring periods. High PM10 concentration levels, including the winter-spring peak, have been more significant due to the Saharan wind circulation. Complementary statistical approaches, concerning the simple linear regression, the factorial analysis of correspondences, the quality of representation, and the hierarchical cluster analysis, have revealed the simultaneous impact of local sources and extreme meteorological conditions on highly registered PM10 concentrations, particularly in the presence of an obstacle such as buildings. The investigation of Air Quality Health Index (AQHI) has exhibited that more than 60% of the period in focus has been characterized by good-to-fair air quality for the ordinary people. The remainder has been characterized by poor to very poor air quality for the same kind of people. Furthermore, more than 70% of the whole period has been found unhealthy for sensitive groups, hindering them from any outdoor activities.

Diversity, Richness and Composition of Ant Communities (Hymenoptera: Formicidae) in the Pre-Saharan Steppe of Algeria

This paper describes the structure and composition of ant communities in the pre-Saharan steppe of Algeria. The study focused on three stations located in two regions with different climates: semi-arid (Aflou) and arid (Laghouat). Ants were collected between March 2013 and February 2014, using pitfall trap sampling over a four-season period and quadrat counting techniques. A total of 20 ant species have been identified, which belong to 8 genera in three subfamilies: Dolichoderinae, Myrmicinae and Formicinae. Moreover, it was noticed that the study areas, which can be characterized by their floristic nature, physiognomic and even edaphic aspects, directly influence the ant community ecology and distribution. We classified them in both eurytopic and stenotopic species. It was also observed, using a Correspondence Factorial Analysis (CFA), that the ants’ activity is seasonal and often correlated with temperature fluctuation and trophic availability.