Pub Date : 2020-02-03DOI: 10.37134/ejsmt.vol7.1.2.2020
R. M. Rani, Ahmad Fakhry Nadar
Supplier selection is not an easy process as it typically involves multiple criteria and it requires human judgment. Therefore, there is a need to have a better system for supplier selection due to uncertainty and vagueness that exist in dealing with the multiple criteria decision making (MCDM) problem. This study is aimed to identify the important criteria for the selection of the best pharmaceutical raw materials supplier for XYZ Pharmaceutical Manufacturing company by using Fuzzy Analytical Hierarchy Process (AHP) and Fuzzy VIKOR approaches. Furthermore, this paper also presents the comparison results between the two methods in determining the best supplier. Fuzzy theory was used since it provides a right tool to encounter the uncertainties and complexity of decision making environment. This study investigated eight alternative suppliers based on seven criteria evaluated by two decision makers from the company. This study has successfully identified the top three most important criteria for the selection of supplier, namely, Regulatory Compliance, Price, and Product Variety. This study highlighted that Regulatory Compliance is a new important criterion for the pharmaceutical company to consider in future supplier selection. Based on the alternative results of Fuzzy AHP, it was found that the top three most important supplier were A5, A3 and A1. While based on the alternative results of Fuzzy VIKOR, it showed that the top three most important supplier were A5, A3 and A7. The comparison results between the two methods have shown that the Fuzzy VIKOR method is more suited to the problem of supplier selection.
{"title":"Supplier selection using Fuzzy AHP and Fuzzy Vikor for XYZ Pharmaceutical Manufacturing Company","authors":"R. M. Rani, Ahmad Fakhry Nadar","doi":"10.37134/ejsmt.vol7.1.2.2020","DOIUrl":"https://doi.org/10.37134/ejsmt.vol7.1.2.2020","url":null,"abstract":"Supplier selection is not an easy process as it typically involves multiple criteria and it requires human judgment. Therefore, there is a need to have a better system for supplier selection due to uncertainty and vagueness that exist in dealing with the multiple criteria decision making (MCDM) problem. This study is aimed to identify the important criteria for the selection of the best pharmaceutical raw materials supplier for XYZ Pharmaceutical Manufacturing company by using Fuzzy Analytical Hierarchy Process (AHP) and Fuzzy VIKOR approaches. Furthermore, this paper also presents the comparison results between the two methods in determining the best supplier. Fuzzy theory was used since it provides a right tool to encounter the uncertainties and complexity of decision making environment. This study investigated eight alternative suppliers based on seven criteria evaluated by two decision makers from the company. This study has successfully identified the top three most important criteria for the selection of supplier, namely, Regulatory Compliance, Price, and Product Variety. This study highlighted that Regulatory Compliance is a new important criterion for the pharmaceutical company to consider in future supplier selection. Based on the alternative results of Fuzzy AHP, it was found that the top three most important supplier were A5, A3 and A1. While based on the alternative results of Fuzzy VIKOR, it showed that the top three most important supplier were A5, A3 and A7. The comparison results between the two methods have shown that the Fuzzy VIKOR method is more suited to the problem of supplier selection.","PeriodicalId":11475,"journal":{"name":"EDUCATUM Journal of Science, Mathematics and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84587126","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 : 2020-01-31DOI: 10.37134/EJSMT.VOL7.1.1.2020
R. Mfon, S. Hall, A. Sarua
Zinc oxide nanoparticles biosynthesized using two concentrations of Ocimum gratissimum (Og) plant leaf extracts were annealed at two different temperatures. Their UV-Vis absorbance peaks at 372 nm - 375 nm indicate a blue shift in excitonic absorption and their optical energy band gap values were in the range 3.22 eV – 3.31 eV. SEM images show the nanoparticles to be polydispersed and of a wide range of sizes with smaller nanoparticles clustering around bigger micrometer- sized ones with sharp edges. An annealing temperature of 400 resulted in the sintering of the nanoparticles but nanoparticles annealed at 250 had porous surfaces suggesting a possible use in gas sensor applications. XRD patterns show that the ZnO nanoparticles have the hexagonal wurtzite structure and are of good crystalline structure. Obtained crystallite sizes increased with annealing temperature and were in the range 14 nm to 29 nm. FTIR spectra show phenols, amines and aldehydes as the available reducing agents involved in the nanoparticle synthesis. The photoluminescence (PL) spectra show two emission peaks: a UV emission peak at 369 -381 nm indicating that the zinc oxide nanoparticles exhibited band-edge photoluminescence and a green emission peak at 523 nm – 538 nm suggesting the presence of defects from singly ionized oxygen vacancies. The PL peak intensities were dependent on the annealing temperatures with the UV- emission peaks for higher annealing temperatures exhibiting a spectral shift towards lower wavelengths. Plant leaf extracts concentration and the annealing temperatures used affect the structure and optical properties of the synthesized ZnO nanoparticles.
{"title":"Effect of Ocimum gratissimum plant leaf extract concentration and annealing temperature on the structure and optical properties of synthesized zinc oxide nanoparticles","authors":"R. Mfon, S. Hall, A. Sarua","doi":"10.37134/EJSMT.VOL7.1.1.2020","DOIUrl":"https://doi.org/10.37134/EJSMT.VOL7.1.1.2020","url":null,"abstract":"Zinc oxide nanoparticles biosynthesized using two concentrations of Ocimum gratissimum (Og) plant leaf extracts were annealed at two different temperatures. Their UV-Vis absorbance peaks at 372 nm - 375 nm indicate a blue shift in excitonic absorption and their optical energy band gap values were in the range 3.22 eV – 3.31 eV. SEM images show the nanoparticles to be polydispersed and of a wide range of sizes with smaller nanoparticles clustering around bigger micrometer- sized ones with sharp edges. An annealing temperature of 400 resulted in the sintering of the nanoparticles but nanoparticles annealed at 250 had porous surfaces suggesting a possible use in gas sensor applications. XRD patterns show that the ZnO nanoparticles have the hexagonal wurtzite structure and are of good crystalline structure. Obtained crystallite sizes increased with annealing temperature and were in the range 14 nm to 29 nm. FTIR spectra show phenols, amines and aldehydes as the available reducing agents involved in the nanoparticle synthesis. The photoluminescence (PL) spectra show two emission peaks: a UV emission peak at 369 -381 nm indicating that the zinc oxide nanoparticles exhibited band-edge photoluminescence and a green emission peak at 523 nm – 538 nm suggesting the presence of defects from singly ionized oxygen vacancies. The PL peak intensities were dependent on the annealing temperatures with the UV- emission peaks for higher annealing temperatures exhibiting a spectral shift towards lower wavelengths. Plant leaf extracts concentration and the annealing temperatures used affect the structure and optical properties of the synthesized ZnO nanoparticles.","PeriodicalId":11475,"journal":{"name":"EDUCATUM Journal of Science, Mathematics and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89559052","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 : 2019-12-15DOI: 10.37134/ejsmt.vol6.2.3.2019
Aliyu Mohammed Aliyu, N E Ahmed
Glasses in the series 30MgSO4-(70-x) P2O5-xSm2O3 0.2 x 1.0 mol percent were prepared by single step melt-quench techniques, the structure, physical and optical properties of samarium oxide at different concentrations were studied. The amorphous phase of the samples was verified by X-ray diffraction spectroscopy, the structural units were investigated using Fourier Transform Infrared, Raman and NMR spectroscopy where the spectra reveal the presence of symmetric, asymmetric, torsoional and bending vibration of phosphate groups, the NMR spectra reveals the changes in Qn distribution here discussed, the compositional dependence on physical (density, average molar weight, dielectric constant, Inter-nuclear distance, Field strength, Molar volume, Molar refractivity etc) and optical parameters were determined. In terms of structural modifications, there is variation of density and molar volume, the glass sample has increasing refractive index values with decreasing molar volume content. The luminescence spectra were observed within UV-Vis-NIR region, the absorption spectra of the sample were recorded in the range of 350 to 1800 nm meanwhile, absorption edge the optical band-gap, and E was evaluated. Our result may be advantageous for many optical applications (e.g visible lasers or color displays).
{"title":"Structure and Physical Properties of 30MgSO4-(70-x) P2O5-xSm2O3 glasses","authors":"Aliyu Mohammed Aliyu, N E Ahmed","doi":"10.37134/ejsmt.vol6.2.3.2019","DOIUrl":"https://doi.org/10.37134/ejsmt.vol6.2.3.2019","url":null,"abstract":"Glasses in the series 30MgSO4-(70-x) P2O5-xSm2O3 0.2 x 1.0 mol percent were prepared by single step melt-quench techniques, the structure, physical and optical properties of samarium oxide at different concentrations were studied. The amorphous phase of the samples was verified by X-ray diffraction spectroscopy, the structural units were investigated using Fourier Transform Infrared, Raman and NMR spectroscopy where the spectra reveal the presence of symmetric, asymmetric, torsoional and bending vibration of phosphate groups, the NMR spectra reveals the changes in Qn distribution here discussed, the compositional dependence on physical (density, average molar weight, dielectric constant, Inter-nuclear distance, Field strength, Molar volume, Molar refractivity etc) and optical parameters were determined. In terms of structural modifications, there is variation of density and molar volume, the glass sample has increasing refractive index values with decreasing molar volume content. The luminescence spectra were observed within UV-Vis-NIR region, the absorption spectra of the sample were recorded in the range of 350 to 1800 nm meanwhile, absorption edge the optical band-gap, and E was evaluated. Our result may be advantageous for many optical applications (e.g visible lasers or color displays).","PeriodicalId":11475,"journal":{"name":"EDUCATUM Journal of Science, Mathematics and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91397858","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 : 2019-06-28DOI: 10.37134/EJSMT.VOL6.1.6.2019
M. I. E. Zulkifly, A. Wahab
In this paper, an intuitionistic fuzzy B-spline space curve is defined and some of its properties is introduced. Firstly, intuitionistic fuzzy control point is defined based on intuitionistic fuzzy and geometrical modeling concepts. Each of the control point relation that consists of three function is find and shown. Later, the control point is blended with B-spline basis function and intuitionistic fuzzy B-spline curve is visualized. Some of the control point and space curve properties in the Euclidean space is also discussed throughout this paper.
{"title":"Visualization of Intuitionistic Fuzzy B-Spline Space Curve and Its Properties","authors":"M. I. E. Zulkifly, A. Wahab","doi":"10.37134/EJSMT.VOL6.1.6.2019","DOIUrl":"https://doi.org/10.37134/EJSMT.VOL6.1.6.2019","url":null,"abstract":"In this paper, an intuitionistic fuzzy B-spline space curve is defined and some of its properties is introduced. Firstly, intuitionistic fuzzy control point is defined based on intuitionistic fuzzy and geometrical modeling concepts. Each of the control point relation that consists of three function is find and shown. Later, the control point is blended with B-spline basis function and intuitionistic fuzzy B-spline curve is visualized. Some of the control point and space curve properties in the Euclidean space is also discussed throughout this paper.","PeriodicalId":11475,"journal":{"name":"EDUCATUM Journal of Science, Mathematics and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78643000","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 : 2019-06-26DOI: 10.37134/EJSMT.VOL6.1.5.2019
Zuraini Othman, A. Abdullah, Sharifah Sakinah Syed Ahmad, F. Kasmin
Extrema points are usually applied to solve everyday problems, for example, to determine the potential of a created tool and for optimisation. In this study, extrema points were used to help determine the region of interest (ROI) for the iris in iris recognition systems. Iris recognition is an automated method of biometric identification that uses mathematical pattern-recognition techniques on the images of one or both irises of an individual's eyes, where the complex patterns are unique, stable, and can be seen from a distance. In order to obtain accurate results, the iris must be localised correctly. Hence, to address this issue, this paper proposed a method of iris localisation in the case of ideal and non-ideal iris images. In this study, the algorithm was based on finding the classification for the region of interest (ROI) with the help of a Support Vector Machine (SVM) by applying a histogram of grey level values as a descriptor in each region from the region growing technique. The valid ROI was found from the probabilities graph of the SVM obtained by looking at the global minimum conditions determined by a second derivative model in a graph of functions. Furthermore, the model from the global minimum condition values was used in the test phase, and the results showed that the ROI image obtained helped in the elimination of sensitive noise with the involvement of fewer computations, while reserving relevant information.
{"title":"Extrema Points Application in Determining Iris Region of Interest","authors":"Zuraini Othman, A. Abdullah, Sharifah Sakinah Syed Ahmad, F. Kasmin","doi":"10.37134/EJSMT.VOL6.1.5.2019","DOIUrl":"https://doi.org/10.37134/EJSMT.VOL6.1.5.2019","url":null,"abstract":"Extrema points are usually applied to solve everyday problems, for example, to determine the potential of a created tool and for optimisation. In this study, extrema points were used to help determine the region of interest (ROI) for the iris in iris recognition systems. Iris recognition is an automated method of biometric identification that uses mathematical pattern-recognition techniques on the images of one or both irises of an individual's eyes, where the complex patterns are unique, stable, and can be seen from a distance. In order to obtain accurate results, the iris must be localised correctly. Hence, to address this issue, this paper proposed a method of iris localisation in the case of ideal and non-ideal iris images. In this study, the algorithm was based on finding the classification for the region of interest (ROI) with the help of a Support Vector Machine (SVM) by applying a histogram of grey level values as a descriptor in each region from the region growing technique. The valid ROI was found from the probabilities graph of the SVM obtained by looking at the global minimum conditions determined by a second derivative model in a graph of functions. Furthermore, the model from the global minimum condition values was used in the test phase, and the results showed that the ROI image obtained helped in the elimination of sensitive noise with the involvement of fewer computations, while reserving relevant information.","PeriodicalId":11475,"journal":{"name":"EDUCATUM Journal of Science, Mathematics and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87539481","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 : 2019-06-25DOI: 10.37134/EJSMT.VOL6.1.4.2019
F. Kasmin, Zuraini Othman, Sharifah Sakinah Syed Ahmad
Numerous decisions in our daily lives require the ability to calculate, solve problems, and employ concepts and skills in mathematics. However, students always have bad perceptions in mathematics as this subject is often challenging for students to master. Reports on issues about students’ mathematical education have been raised by many mathematics educators. Among of the issues are about difficulties in understanding mathematical concepts, attitudes towards mathematics, low achievement in mathematics and many more. Hence, the aim of this study is to explore students’ perceptions and attitudes towards mathematics by analyzing the impact of teaching application of mathematics to the students. The data were collected from Computer Science students where each participant was assigned to complete self-reported and close ended questionnaire. In this study, examination on attitudes of student include engagement, confidence and importance of mathematics. Data were analyzed by measuring the difference of individual statements on percentage of agreeing in pre – Smart for mathematics and post – Smart for mathematics. The findings show that when students learned and exposed to the application of mathematics, their engagement, confidence and importance of mathematics increases. It can concluded that by exposing students the purpose of learning mathematics in computer science, students’ positive attitude towards mathematics can be developed and hence improve their interests in learning mathematics
{"title":"Improving Students’ Perception Towards Learning Mathematics: Impact of Teaching Application of Mathematics","authors":"F. Kasmin, Zuraini Othman, Sharifah Sakinah Syed Ahmad","doi":"10.37134/EJSMT.VOL6.1.4.2019","DOIUrl":"https://doi.org/10.37134/EJSMT.VOL6.1.4.2019","url":null,"abstract":"Numerous decisions in our daily lives require the ability to calculate, solve problems, and employ concepts and skills in mathematics. However, students always have bad perceptions in mathematics as this subject is often challenging for students to master. Reports on issues about students’ mathematical education have been raised by many mathematics educators. Among of the issues are about difficulties in understanding mathematical concepts, attitudes towards mathematics, low achievement in mathematics and many more. Hence, the aim of this study is to explore students’ perceptions and attitudes towards mathematics by analyzing the impact of teaching application of mathematics to the students. The data were collected from Computer Science students where each participant was assigned to complete self-reported and close ended questionnaire. In this study, examination on attitudes of student include engagement, confidence and importance of mathematics. Data were analyzed by measuring the difference of individual statements on percentage of agreeing in pre – Smart for mathematics and post – Smart for mathematics. The findings show that when students learned and exposed to the application of mathematics, their engagement, confidence and importance of mathematics increases. It can concluded that by exposing students the purpose of learning mathematics in computer science, students’ positive attitude towards mathematics can be developed and hence improve their interests in learning mathematics","PeriodicalId":11475,"journal":{"name":"EDUCATUM Journal of Science, Mathematics and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82959540","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 : 2019-06-24DOI: 10.37134/ejsmt.vol6.1.3.2019
Tomoko Nishikawa, G. Izuta
This article is concerned with the assessment of feelings that Japanese junior high school students have towards unit learning of mathematics courses. To accomplish this purpose, 616 junior high school students of a typical public school were surveyed regarding their feelings towards these course units and a two-step analysis was carried out. The first part consisted of the tabulation of Likert scale type survey with 5 levels of evaluation from 1 (‘not good at’) through 5 (‘good at’) aimed to evaluate their feelings towards learning mathematics in general as part of their educational activity. Next, we looked only into the students who responded ‘no problem’. As a matter of fact, these respondents accounted for 181 students in all with 44 of them in first year, 75 in second year, and 63 in third year. Now focusing strictly on these students, we performed a correspondence analysis of their feelings towards the course units. The results are discussed in terms of this correspondence analysis, which made it clear that despite the fact that the students do not feel resistance towards learning the subjects of mathematics, they have ‘good at’ and ‘not good at’ feelings towards particular unit learning independent of the gender. In the paper, we discussed these findings in detail.
{"title":"Assessing the Attitudes of Japanese Junior High School Students towards Course Units of Mathematics","authors":"Tomoko Nishikawa, G. Izuta","doi":"10.37134/ejsmt.vol6.1.3.2019","DOIUrl":"https://doi.org/10.37134/ejsmt.vol6.1.3.2019","url":null,"abstract":"This article is concerned with the assessment of feelings that Japanese junior high school students have towards unit learning of mathematics courses. To accomplish this purpose, 616 junior high school students of a typical public school were surveyed regarding their feelings towards these course units and a two-step analysis was carried out. The first part consisted of the tabulation of Likert scale type survey with 5 levels of evaluation from 1 (‘not good at’) through 5 (‘good at’) aimed to evaluate their feelings towards learning mathematics in general as part of their educational activity. Next, we looked only into the students who responded ‘no problem’. As a matter of fact, these respondents accounted for 181 students in all with 44 of them in first year, 75 in second year, and 63 in third year. Now focusing strictly on these students, we performed a correspondence analysis of their feelings towards the course units. The results are discussed in terms of this correspondence analysis, which made it clear that despite the fact that the students do not feel resistance towards learning the subjects of mathematics, they have ‘good at’ and ‘not good at’ feelings towards particular unit learning independent of the gender. In the paper, we discussed these findings in detail.","PeriodicalId":11475,"journal":{"name":"EDUCATUM Journal of Science, Mathematics and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86789365","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 : 2019-06-24DOI: 10.37134/EJSMT.VOL6.1.2.2019
Azli B. Sulaiman, A. Othman, I. Ibrahim, M. Rozi
Reagent grade of calcium and magnesium hydroxides were used in this study to treat acid mine drainage (AMD) sample. AMD sample was collected from a tin tailing pond that located in Pengkalan Hulu, Perak which as pH around 2.87 ± 0.01. pH values had increased after treated with calcium hydroxide (Ca(OH)2) and magnesium hydroxide (Mg(OH)2), respectively. The maximum pH values obtained was 11.35 ± 0.01 by using 1.0 g of Ca(OH)2 at interval time 5 min. For Mg(OH)2, the highest pH value can be obtained was 7.22 ± 0.01 by using 1.0 g at interval time 30 min. The concentration of heavy metals such as aluminum, copper, iron, manganese, nickel and zinc were reduced after reaction with both materials. For examples aluminum concentration was reduced from 110.33 mg/L to 2.80 mg/L and 0.01 mg/L by using 1.0 g of Ca(OH)2 and Mg(OH)2, respectively.
{"title":"The Use of Calcium and Magnesium Hydroxides in Acid Mine Drainage Treatment","authors":"Azli B. Sulaiman, A. Othman, I. Ibrahim, M. Rozi","doi":"10.37134/EJSMT.VOL6.1.2.2019","DOIUrl":"https://doi.org/10.37134/EJSMT.VOL6.1.2.2019","url":null,"abstract":"Reagent grade of calcium and magnesium hydroxides were used in this study to treat acid mine drainage (AMD) sample. AMD sample was collected from a tin tailing pond that located in Pengkalan Hulu, Perak which as pH around 2.87 ± 0.01. pH values had increased after treated with calcium hydroxide (Ca(OH)2) and magnesium hydroxide (Mg(OH)2), respectively. The maximum pH values obtained was 11.35 ± 0.01 by using 1.0 g of Ca(OH)2 at interval time 5 min. For Mg(OH)2, the highest pH value can be obtained was 7.22 ± 0.01 by using 1.0 g at interval time 30 min. The concentration of heavy metals such as aluminum, copper, iron, manganese, nickel and zinc were reduced after reaction with both materials. For examples aluminum concentration was reduced from 110.33 mg/L to 2.80 mg/L and 0.01 mg/L by using 1.0 g of Ca(OH)2 and Mg(OH)2, respectively.","PeriodicalId":11475,"journal":{"name":"EDUCATUM Journal of Science, Mathematics and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83926262","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}
The main purpose of this study is to determine the effectiveness of the modern teaching method to teaching learning process. The descriptive-quantitative method was employed using a questionnaire as data gathering instrument. Frequencies, percentages and weighted mean were used to treat the data. The target population of the study was 286 of the senior high school students of the University of La Salette, Inc. – Santiago City during the school year 2018-2019. The study showed that modern teaching method has a positive impact on the learning of the students. It gives a lot of benefits that characterize a life-long learning. Also, through the modern teaching a method, students will be able to learn some values that will lead them to success. It also revealed that among the four-teaching method, brainstorming is the most effective for the students to learn. Based on the findings and conclusions of the study, it was recommended that teachers need to continually develop a method that will let their students easily to learn and in order to cope up with the needs of the students. They should always reflect on their own methods to improve the teaching learning process. Also, in choosing an appropriate teaching method, teachers should consider his or her subject matter and students. It is not necessary that brainstorming is always effective in teaching learning process thus, when a teacher employ a teaching method he/she needs to exert an effort to fully experience the effectiveness of the teaching method. It also recommended that future researchers must use an experimentation design to determine the effectiveness of the different teaching method.
{"title":"Prevalence of Modern Teaching Method among Senior High School Students","authors":"Matronillo Martin, Gilbert Laciste, Kristine Concepcion","doi":"10.37134/EJSMT.VOL6.1.1.2019","DOIUrl":"https://doi.org/10.37134/EJSMT.VOL6.1.1.2019","url":null,"abstract":"The main purpose of this study is to determine the effectiveness of the modern teaching method to teaching learning process. The descriptive-quantitative method was employed using a questionnaire as data gathering instrument. Frequencies, percentages and weighted mean were used to treat the data. The target population of the study was 286 of the senior high school students of the University of La Salette, Inc. – Santiago City during the school year 2018-2019. The study showed that modern teaching method has a positive impact on the learning of the students. It gives a lot of benefits that characterize a life-long learning. Also, through the modern teaching a method, students will be able to learn some values that will lead them to success. It also revealed that among the four-teaching method, brainstorming is the most effective for the students to learn. Based on the findings and conclusions of the study, it was recommended that teachers need to continually develop a method that will let their students easily to learn and in order to cope up with the needs of the students. They should always reflect on their own methods to improve the teaching learning process. Also, in choosing an appropriate teaching method, teachers should consider his or her subject matter and students. It is not necessary that brainstorming is always effective in teaching learning process thus, when a teacher employ a teaching method he/she needs to exert an effort to fully experience the effectiveness of the teaching method. It also recommended that future researchers must use an experimentation design to determine the effectiveness of the different teaching method.","PeriodicalId":11475,"journal":{"name":"EDUCATUM Journal of Science, Mathematics and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91291276","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 : 2018-12-20DOI: 10.37134/EJSMT.VOL5.2.7.2018
M. Primastuti, E. Priyambodo
The systemic approaches connect a set of interacting, functioning, and interdependent or elements with mutual relationships. The objective of this study is to analyze how students' cognitive ability profiles if measured using Chemistry Systemic Multiple Choices Questions (CSMCQs). This study was conducted by testing CSMCQs to the 157 students who studied with the usual learning approaches by teachers. Data collection technique were conducted using the objective test instruments consist of C1 to C6 cognitive abilitiy domains. Data were analyzed using descriptive percentage analysis. The results showed that students' cognitive ability is in the highest category. Based on these result, Chemistry Systemic Multiple Choice Questions (CSMCQs) can be used as an alternative learning evaluation instrument to develop students’ cognitive abilities.
{"title":"Profile of Students’ Cognitive Ability in Chemistry Learning using Chemistry Systemic Multiple Choice Questions (CSMCQs)","authors":"M. Primastuti, E. Priyambodo","doi":"10.37134/EJSMT.VOL5.2.7.2018","DOIUrl":"https://doi.org/10.37134/EJSMT.VOL5.2.7.2018","url":null,"abstract":"The systemic approaches connect a set of interacting, functioning, and interdependent or elements with mutual relationships. The objective of this study is to analyze how students' cognitive ability profiles if measured using Chemistry Systemic Multiple Choices Questions (CSMCQs). This study was conducted by testing CSMCQs to the 157 students who studied with the usual learning approaches by teachers. Data collection technique were conducted using the objective test instruments consist of C1 to C6 cognitive abilitiy domains. Data were analyzed using descriptive percentage analysis. The results showed that students' cognitive ability is in the highest category. Based on these result, Chemistry Systemic Multiple Choice Questions (CSMCQs) can be used as an alternative learning evaluation instrument to develop students’ cognitive abilities.","PeriodicalId":11475,"journal":{"name":"EDUCATUM Journal of Science, Mathematics and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74339279","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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