Pub Date : 2023-08-14DOI: 10.15406/oajs.2023.06.00198
Javier Andres Ledezma Rios
Electromagnetic waves can give us information about certain situations, but the loss of energy due to contact or penetration into surfaces can vary the information data when it is influenced by the relative permittivity of the medium and the dielectric constant of some materials, so for the detection, it is necessary to investigate other types of signals that do not generate loss of information, when they are used for detection in terrains with particular characteristics. In this research, the detection capacity of a GPR system is analyzed when it makes use of wavelet-type signals, which are better known as a signal analysis tool, resulting in wavelet-type signals that can identify buried objects when transmitted. and received under the amplitude analysis, the correlation and the penetration depth of the signal.
{"title":"Study of the detection capacity of a GPR system using wavelet waves in a dry clay soil","authors":"Javier Andres Ledezma Rios","doi":"10.15406/oajs.2023.06.00198","DOIUrl":"https://doi.org/10.15406/oajs.2023.06.00198","url":null,"abstract":"Electromagnetic waves can give us information about certain situations, but the loss of energy due to contact or penetration into surfaces can vary the information data when it is influenced by the relative permittivity of the medium and the dielectric constant of some materials, so for the detection, it is necessary to investigate other types of signals that do not generate loss of information, when they are used for detection in terrains with particular characteristics. In this research, the detection capacity of a GPR system is analyzed when it makes use of wavelet-type signals, which are better known as a signal analysis tool, resulting in wavelet-type signals that can identify buried objects when transmitted. and received under the amplitude analysis, the correlation and the penetration depth of the signal.","PeriodicalId":19581,"journal":{"name":"Open Access Journal of Science","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87990192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-31DOI: 10.15406/oajs.2023.06.00197
A. A, Poli S, Montant Mes, Hoinsou Y, Gbati L, Gbekley Eh, Djeri B
In Africa many plants are used as antifungals. However, journals analysing the work of antifungal activities of plants in West Africa in recent years are rare. This study is a synthesis of publications from 2006 to 2021 on plants traditionally used in the fight against antifungal diseases. A systematic search was carried out in the Pub Med and Google Scholar database using the following keywords: vaginitis; West Africa; antifungal activity; medicinal plants; plant extracts; for articles published from 2006 to 2021. These selected articles focus on ethnobotanical studies, in vitro antifungal tests and molecules isolated from these plants. A total of 46 papers were selected from 7 West African countries with 56 plants studied. Nigeria and Ivory coast did more work with 22 and 14 papers respectively and studied more plants with 23 and 17 respectively. 43% of plants show good activity in vitro on strains of Candida albicans in the laboratory with a minimum fungicide concentration and a percentage of inhibition above 50%. The most active extracts are found in Ivory coast with respectively the hexane extracts of Terminalia mantaly with a minimum fungicide concentration= 0.024 mg / mL and the hydroethanolic extract of Terminalia ivorensis with a minimum fungicide concentration of 0.097 mg / mL. It is clear that the traditional West African pharmacopoeia can make an important contribution for the management of vaginitis.
{"title":"Antifungal activity of African medicinal plants: a review","authors":"A. A, Poli S, Montant Mes, Hoinsou Y, Gbati L, Gbekley Eh, Djeri B","doi":"10.15406/oajs.2023.06.00197","DOIUrl":"https://doi.org/10.15406/oajs.2023.06.00197","url":null,"abstract":"In Africa many plants are used as antifungals. However, journals analysing the work of antifungal activities of plants in West Africa in recent years are rare. This study is a synthesis of publications from 2006 to 2021 on plants traditionally used in the fight against antifungal diseases. A systematic search was carried out in the Pub Med and Google Scholar database using the following keywords: vaginitis; West Africa; antifungal activity; medicinal plants; plant extracts; for articles published from 2006 to 2021. These selected articles focus on ethnobotanical studies, in vitro antifungal tests and molecules isolated from these plants. A total of 46 papers were selected from 7 West African countries with 56 plants studied. Nigeria and Ivory coast did more work with 22 and 14 papers respectively and studied more plants with 23 and 17 respectively. 43% of plants show good activity in vitro on strains of Candida albicans in the laboratory with a minimum fungicide concentration and a percentage of inhibition above 50%. The most active extracts are found in Ivory coast with respectively the hexane extracts of Terminalia mantaly with a minimum fungicide concentration= 0.024 mg / mL and the hydroethanolic extract of Terminalia ivorensis with a minimum fungicide concentration of 0.097 mg / mL. It is clear that the traditional West African pharmacopoeia can make an important contribution for the management of vaginitis.","PeriodicalId":19581,"journal":{"name":"Open Access Journal of Science","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77263552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-13DOI: 10.15406/oajs.2023.06.00194
Oguntola Emmanuel Ayodeji
This study was carried out to evaluate the effectiveness of oil extracts from Ageratum conyzoides L., Petiveria alliacea L., and Hyptis suaveolens L. as biopesticides against Sitophilus oryzae in the Entomology Laboratory of Federal University of Technology Akure, Ondo State. The experiments were conducted at a temperature of 28±2°C and a relative humidity of 75±5%. Methanol was used as a solvent to extract the oil from the plants, and different concentrations (0.5%, 1.0%, 1.5%, 2.0%, and 2.5%) of each plant extract were prepared. The results demonstrated that the oil extracts from all three plants had a significant impact on the mortality of Sitophilus oryzae. Among them, the oil extract from Hyptis suaveolens proved to be the most effective, causing 100% mortality of Sitophilus oryzae at 2.0% and 2.5% concentrations within 96 hours of introduction. The LD50 (concentration required to cause 50% mortality) for Hyptis suaveolens was 0.53 (at 96 hours) and 0.36 (at 120 hours), while the LD90 (concentration required to cause 90% mortality) was 4.27 (at 96 hours) and 1.86 (at 120 hours) for Sitophilus oryzae. Furthermore, the oil extracts of all three plants significantly reduced adult emergence of the insects and prevented weight loss in the seeds. These effects were particularly prominent at concentrations of 2.0% and 2.5%. Statistical analysis indicated significant differences (p < 0.05) between the treatments and control groups for all the parameters assessed. In conclusion, the results of this study demonstrated that the leaf extract of Hyptis suaveolens was more effective than the extracts from the other plants in reducing Sitophilus oryzae populations, inhibiting adult emergence, and preventing weight loss in stored grains. Therefore, Hyptis suaveolens can be considered as a valuable addition to the range of botanicals used for Sitophilus oryzae control in food storage.
{"title":"Biopesticidal activities of three botanicals (Ageratum conyzoides L., Petiveria alliacea L. and Hyptis suaveolens L. Poit,) against Sitophilus oryzae L","authors":"Oguntola Emmanuel Ayodeji","doi":"10.15406/oajs.2023.06.00194","DOIUrl":"https://doi.org/10.15406/oajs.2023.06.00194","url":null,"abstract":"This study was carried out to evaluate the effectiveness of oil extracts from Ageratum conyzoides L., Petiveria alliacea L., and Hyptis suaveolens L. as biopesticides against Sitophilus oryzae in the Entomology Laboratory of Federal University of Technology Akure, Ondo State. The experiments were conducted at a temperature of 28±2°C and a relative humidity of 75±5%. Methanol was used as a solvent to extract the oil from the plants, and different concentrations (0.5%, 1.0%, 1.5%, 2.0%, and 2.5%) of each plant extract were prepared. The results demonstrated that the oil extracts from all three plants had a significant impact on the mortality of Sitophilus oryzae. Among them, the oil extract from Hyptis suaveolens proved to be the most effective, causing 100% mortality of Sitophilus oryzae at 2.0% and 2.5% concentrations within 96 hours of introduction. The LD50 (concentration required to cause 50% mortality) for Hyptis suaveolens was 0.53 (at 96 hours) and 0.36 (at 120 hours), while the LD90 (concentration required to cause 90% mortality) was 4.27 (at 96 hours) and 1.86 (at 120 hours) for Sitophilus oryzae. Furthermore, the oil extracts of all three plants significantly reduced adult emergence of the insects and prevented weight loss in the seeds. These effects were particularly prominent at concentrations of 2.0% and 2.5%. Statistical analysis indicated significant differences (p < 0.05) between the treatments and control groups for all the parameters assessed. In conclusion, the results of this study demonstrated that the leaf extract of Hyptis suaveolens was more effective than the extracts from the other plants in reducing Sitophilus oryzae populations, inhibiting adult emergence, and preventing weight loss in stored grains. Therefore, Hyptis suaveolens can be considered as a valuable addition to the range of botanicals used for Sitophilus oryzae control in food storage.","PeriodicalId":19581,"journal":{"name":"Open Access Journal of Science","volume":"9 3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77598868","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-12DOI: 10.15406/oajs.2023.06.00193
Miguel Correia
This article aims to reflect on the work of Thomas More - Utopia (1516) - a timeless vision that enlightens human thought in the unpredictable world of contemporaneity. This reflection will be divided into six focuses of analysis: Organization, Land Cultivation, Private Life and Institutions, Education and Gender Relations, More’s Critics, and Parallelism between More and Comenius. Finally, it will focus on the issues of utopia and education in the world and people's lives, as well as on its meaning and usefulness to lead the world of contemporaneity, without neglecting that utopia highlights what is absent in the present and imagines what can be achieved in the future.
{"title":"Utopia and education through the thought of Thomas More","authors":"Miguel Correia","doi":"10.15406/oajs.2023.06.00193","DOIUrl":"https://doi.org/10.15406/oajs.2023.06.00193","url":null,"abstract":"This article aims to reflect on the work of Thomas More - Utopia (1516) - a timeless vision that enlightens human thought in the unpredictable world of contemporaneity. This reflection will be divided into six focuses of analysis: Organization, Land Cultivation, Private Life and Institutions, Education and Gender Relations, More’s Critics, and Parallelism between More and Comenius. Finally, it will focus on the issues of utopia and education in the world and people's lives, as well as on its meaning and usefulness to lead the world of contemporaneity, without neglecting that utopia highlights what is absent in the present and imagines what can be achieved in the future.","PeriodicalId":19581,"journal":{"name":"Open Access Journal of Science","volume":"48 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78712432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-05DOI: 10.15406/oajs.2023.06.00192
Sanyern Y Rico-García
Although the globalized world in which we live brings technological facilities that favour adaptation to the system, it also entails a disconnection between human beings and the context in which they live. This results in the adoption of patterns and trends that reduce people's quality of life, such as the disconnection between outdoor air pollution and indoor environments. Therefore, this opinion document aims to provide a perspective on the problem and answer the question of whether initiatives to mitigate this phenomenon and educate people about the relationship between indoor air quality and space design are an optimal strategy within the system's framework.
{"title":"Relationship between indoor air quality and space design for human health","authors":"Sanyern Y Rico-García","doi":"10.15406/oajs.2023.06.00192","DOIUrl":"https://doi.org/10.15406/oajs.2023.06.00192","url":null,"abstract":"Although the globalized world in which we live brings technological facilities that favour adaptation to the system, it also entails a disconnection between human beings and the context in which they live. This results in the adoption of patterns and trends that reduce people's quality of life, such as the disconnection between outdoor air pollution and indoor environments. Therefore, this opinion document aims to provide a perspective on the problem and answer the question of whether initiatives to mitigate this phenomenon and educate people about the relationship between indoor air quality and space design are an optimal strategy within the system's framework.","PeriodicalId":19581,"journal":{"name":"Open Access Journal of Science","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89611856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-22DOI: 10.15406/oajs.2023.06.00191
Francisco J García Tartera
Teacher training focuses on generic technologies such as the European framework DigCompEdu, but special education students face them without being inclusive or adapted. DIPCE seeks to design inclusive learning activities where scientific and professional disciplines (pedagogy and didactics of the subject) and inclusive practices are added into a coherent whole. It was based on a selection of European countries by geographical location and a descriptive investigation taking samples from more than 8 educational centers and more than 50 teachers from each partner country. A model has been developed to incorporate digital resources and novel pedagogical approaches into teaching practices. A set of tools is being compiled that offers the means to create accessible and inclusive digital learning content to implement digital education practices. The results on how to transform conventional lessons to their digital format are being well received by teachers.
{"title":"Digital and inclusive pedagogical competences of educators","authors":"Francisco J García Tartera","doi":"10.15406/oajs.2023.06.00191","DOIUrl":"https://doi.org/10.15406/oajs.2023.06.00191","url":null,"abstract":"Teacher training focuses on generic technologies such as the European framework DigCompEdu, but special education students face them without being inclusive or adapted. DIPCE seeks to design inclusive learning activities where scientific and professional disciplines (pedagogy and didactics of the subject) and inclusive practices are added into a coherent whole. It was based on a selection of European countries by geographical location and a descriptive investigation taking samples from more than 8 educational centers and more than 50 teachers from each partner country. A model has been developed to incorporate digital resources and novel pedagogical approaches into teaching practices. A set of tools is being compiled that offers the means to create accessible and inclusive digital learning content to implement digital education practices. The results on how to transform conventional lessons to their digital format are being well received by teachers.","PeriodicalId":19581,"journal":{"name":"Open Access Journal of Science","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82040321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-10DOI: 10.15406/oajs.2023.06.00190
Poli S, Agbodeka K, Ataba E, A. A, Montant Mes, Hoinsou Y, Gbati L, Gbekley Eh, Karou Ds
Nowadays, the use of medicinal plants in the fight against malaria must be based on scientific results of safety and quality. However, reviews of the antiplasmodial activities of plants in West Africa in recent years are rare. This study analyzes scientific publications from 2010 to 2021 on plants traditionally used in antimalarial treatments in West Africa. A systematic search was carried out in the PubMed and google scholar databases using the following keywords: Malaria, Antiplasmodial activity, extract, medicinal plant, West Africa; for articles published from 2010 to 2021. These articles concern ethnobotanical studies, antiplasmodial tests, isolated molecules and toxicity tests. A total of 8 West African countries were explored and 54 papers from 2010 to 2021 were selected with 78 plants studied. Nigeria and Burkina Faso recorded more work with 28 and 7 papers respectively and studied more plants with 31, and 16 respectively. The most active extracts for in vitro tests are found in Nigeria with ethanolic extracts of Phyllanthus amarus and Ipomoea purpurea with respectively an Inhibitory Concentratin of 0.05 μg /mL and 0.06 μg / mL. The most active extract in vivo is found in Nigeria with the methanolic fraction of Parkia biglobosa with a 100% suppression rate at a dose of 100 mg/kg/Day. It is clear that the traditional West African pharmacopoeia is a potential source of effective phytomedicines for the management of malaria.
{"title":"West African medicinal plants: a review of their antimalarial activity","authors":"Poli S, Agbodeka K, Ataba E, A. A, Montant Mes, Hoinsou Y, Gbati L, Gbekley Eh, Karou Ds","doi":"10.15406/oajs.2023.06.00190","DOIUrl":"https://doi.org/10.15406/oajs.2023.06.00190","url":null,"abstract":"Nowadays, the use of medicinal plants in the fight against malaria must be based on scientific results of safety and quality. However, reviews of the antiplasmodial activities of plants in West Africa in recent years are rare. This study analyzes scientific publications from 2010 to 2021 on plants traditionally used in antimalarial treatments in West Africa. A systematic search was carried out in the PubMed and google scholar databases using the following keywords: Malaria, Antiplasmodial activity, extract, medicinal plant, West Africa; for articles published from 2010 to 2021. These articles concern ethnobotanical studies, antiplasmodial tests, isolated molecules and toxicity tests. A total of 8 West African countries were explored and 54 papers from 2010 to 2021 were selected with 78 plants studied. Nigeria and Burkina Faso recorded more work with 28 and 7 papers respectively and studied more plants with 31, and 16 respectively. The most active extracts for in vitro tests are found in Nigeria with ethanolic extracts of Phyllanthus amarus and Ipomoea purpurea with respectively an Inhibitory Concentratin of 0.05 μg /mL and 0.06 μg / mL. The most active extract in vivo is found in Nigeria with the methanolic fraction of Parkia biglobosa with a 100% suppression rate at a dose of 100 mg/kg/Day. It is clear that the traditional West African pharmacopoeia is a potential source of effective phytomedicines for the management of malaria.","PeriodicalId":19581,"journal":{"name":"Open Access Journal of Science","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87089180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-21DOI: 10.15406/oajs.2023.06.00189
Jefferson Carmona Maldonado
The recurrent call for content, elements, and parameters of the methods of investigation against either applied research methodologies oblige to analyze the context faced in the professional formation of sciences and disciplines, notably in public administration. The Multicriteria analysis and Designing Process, outline the work of the one and the other in a complementary manner. Scientific research methods are unique to science and are not easily transportable to other scenarios. Applied methodologies, by arranging as known elements and practical ways, recompose the restrictions that the methods present. Rigorous combination of both orients the role that must comply with the methodology and methods analysis and, not reference chapter. Both are different and their combination requires a greater effort.
{"title":"Scientific research methods and methodologies of research applied in the professional training of the public administrator","authors":"Jefferson Carmona Maldonado","doi":"10.15406/oajs.2023.06.00189","DOIUrl":"https://doi.org/10.15406/oajs.2023.06.00189","url":null,"abstract":"The recurrent call for content, elements, and parameters of the methods of investigation against either applied research methodologies oblige to analyze the context faced in the professional formation of sciences and disciplines, notably in public administration. The Multicriteria analysis and Designing Process, outline the work of the one and the other in a complementary manner. Scientific research methods are unique to science and are not easily transportable to other scenarios. Applied methodologies, by arranging as known elements and practical ways, recompose the restrictions that the methods present. Rigorous combination of both orients the role that must comply with the methodology and methods analysis and, not reference chapter. Both are different and their combination requires a greater effort.","PeriodicalId":19581,"journal":{"name":"Open Access Journal of Science","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76538775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-27DOI: 10.15406/oajs.2023.06.00188
Juan Carlos Maya Gonzalez
This document presents the development of the I2C and SPI communication protocols in the VHDL hardware description language, its implementation was carried out on the Xilinx Nexys 4 DDR FPGA board with temperature sensors (ADXL362) and accelerometer (ADT742). whose chips are integrated into the board. The temperature sensor communicates with the I2C protocol and the accelerometer with the SPI protocol, both communications were integrated into the project and can be selected through the switches provided by the FPGA board. The experimental results carried out demonstrate the reliability of the communication given the precision of the data obtained.
{"title":"Implementation of I2C and SPI communication protocol for temperature and acceleration measurement at FPGA","authors":"Juan Carlos Maya Gonzalez","doi":"10.15406/oajs.2023.06.00188","DOIUrl":"https://doi.org/10.15406/oajs.2023.06.00188","url":null,"abstract":"This document presents the development of the I2C and SPI communication protocols in the VHDL hardware description language, its implementation was carried out on the Xilinx Nexys 4 DDR FPGA board with temperature sensors (ADXL362) and accelerometer (ADT742). whose chips are integrated into the board. The temperature sensor communicates with the I2C protocol and the accelerometer with the SPI protocol, both communications were integrated into the project and can be selected through the switches provided by the FPGA board. The experimental results carried out demonstrate the reliability of the communication given the precision of the data obtained.","PeriodicalId":19581,"journal":{"name":"Open Access Journal of Science","volume":"459 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76500607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-20DOI: 10.15406/oajs.2023.06.00187
Guillermo Cutrera
Spoken language is the vehicle through which a great deal of teaching takes place, as well as the way in which students show the teacher a great deal of what they have learned. In this context, teaching is mostly a means of providing access to those specific ways of speaking. In particular, metadiscourse is a discursive resource used in discursive exchanges in science classrooms. Despite its importance, metadiscourse has been poorly studied in the science classrooms. One of the metadiscourse methods studied in classrooms is the one corresponding to epistemic markers. The purpose of this study is to analyze how a future Chemistry teacher uses metadiscourse to build scientific knowledge along with the students. A qualitative study of the future teacher’s speech was undertaken from discursive exchanges in a physical chemistry classroom. All classes were video and audio recorded for analysis purposes. From total of four classes, a number of extracts were selected from the third class. Based upon a content analysis, representative categories of epistemic markers in the teacher's verbal discourse were inferred. Discourse markers referred to the scientific law recognition as well as its structure and physicochemical properties thay either vary or remain constant during the phenomenon occurence were found. These markers show the importance of considering an explicit work with the epistemic dimension of the content in order to promote the construction of scientific explanations understanding in the science classroom. Additionally, this importance implies the relevance of engaging the future teachers in reflective practices that demonstrate the work with the nature of science from the discursive use of epistemological markers.
{"title":"The nature of science dimension in the teaching discourse. a case study","authors":"Guillermo Cutrera","doi":"10.15406/oajs.2023.06.00187","DOIUrl":"https://doi.org/10.15406/oajs.2023.06.00187","url":null,"abstract":"Spoken language is the vehicle through which a great deal of teaching takes place, as well as the way in which students show the teacher a great deal of what they have learned. In this context, teaching is mostly a means of providing access to those specific ways of speaking. In particular, metadiscourse is a discursive resource used in discursive exchanges in science classrooms. Despite its importance, metadiscourse has been poorly studied in the science classrooms. One of the metadiscourse methods studied in classrooms is the one corresponding to epistemic markers. The purpose of this study is to analyze how a future Chemistry teacher uses metadiscourse to build scientific knowledge along with the students. A qualitative study of the future teacher’s speech was undertaken from discursive exchanges in a physical chemistry classroom. All classes were video and audio recorded for analysis purposes. From total of four classes, a number of extracts were selected from the third class. Based upon a content analysis, representative categories of epistemic markers in the teacher's verbal discourse were inferred. Discourse markers referred to the scientific law recognition as well as its structure and physicochemical properties thay either vary or remain constant during the phenomenon occurence were found. These markers show the importance of considering an explicit work with the epistemic dimension of the content in order to promote the construction of scientific explanations understanding in the science classroom. Additionally, this importance implies the relevance of engaging the future teachers in reflective practices that demonstrate the work with the nature of science from the discursive use of epistemological markers.","PeriodicalId":19581,"journal":{"name":"Open Access Journal of Science","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87946916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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