Skip to main content

rado yendra

Follower

1

Following

2

Public Views

David Ricardo Sol Martinez

IEEE

Kansas State University

Caroline J . Tully

University of Melbourne

Marmara University

Viacheslav Kuleshov

Stockholm University

The University of New Brunswick

Institut Teknologi Sepuluh Nopember

University College Dublin

Rezzy Eko Caraka

University of Indonesia

Taskin Kavzoglu

Gebze Technical University

Interests

Uploads

Papers by rado yendra

The Modelling Number of Daily Death Covid 19 Data Using Some of Two and One Parameter Distributions in Indonesia

International Journal of Mathematics Trends and Technology, Dec 31, 2022

The outbreak of COVID-19 pandemic has caused many deaths. The number of deaths that occur randoml... more The outbreak of COVID-19 pandemic has caused many deaths. The number of deaths that occur randomly per day has caused various problems, including reduced population, increased land for graves, and increased fear of the situation that has arisen which indirectly impacts decreased performance which ultimately weakens a country's economy. However, it is the concern of governments and others' responsibilities to provide the correct statistics and figures to take any practicable necessary steps. Where the statistical literature supposes that a model governs every real phenomenon, once we know the model, we can evaluate the dilemma. Therefore, in this article, we compare and analyze the frequency of a number of death from COVID-19 in Indonesia using the six probability modeling. Probability modeling will be carried out using six distributions, namely Weibull, Gamma, Log Normal, Amarendra, Rani and Akash will be used in this study. The maximum likelihood method will be used to get the estimated parameter from the models used in this study. The distribution will be selected based on some methods of Good of Fit Test namely graphical (pdf plot and cumulative distribution function (CDF) plot) and numerical (Akaike Information Criterion (AIC) and Bayesian Information Criterion (BIC), and Log Likelihood (Log-L)). In most cases, graphical methods give the same results but their AIC and BIC results are different. The most suitable result is selected as the distribution with the lowest AIC and BIC values. In general, the Weibull distribution has been chosen as the best model.

Evaluation of the Curriculum of Junior High School Mathematics Subject Using Spatial Analysis in the Regions of Pekanbaru

International journal of educational methodology, May 15, 2022

Evaluation of the K-13 curriculum (2013 Curriculum) on the value of the national mathematics exam... more Evaluation of the K-13 curriculum (2013 Curriculum) on the value of the national mathematics examination "Nilai Ebtanas Murni" (NEM) in every State Junior High School needs to be carried out thoroughly in order to improve the quality of education. This study uses spatial analysis to evaluate the curriculum and determine the development of NEM scores in the school year. Furthermore, the kriging interpolation method via surfer software was used to generate scores. The results showed that the 2015 K-13 mathematics curriculum did not give good results based on the 36-68 NEM score interval for the entire Pekanbaru area. In addition, the curriculum only gives good results for a small area in the north and south. In 2016, the curriculum which was accompanied by the entry of the new education unit level curriculum "Kurikulum Tingkat Satuan Pendidikan" (KTSP) showed a significant change in the NEM value. Although most of these areas experienced an increase in scores, the intervals still ranged from 36-68. The total revision of the K-13 curriculum carried out and used in 2017 showed a significant increase in scores for all regions with an interval of 68-84 scores. In conclusion, this study shows that the revision of the K-13 curriculum is the right step to produce quality mathematics learning.

Spatial Analysis Application to Reveal the DIiminishing Crime Rate Phenomenon Caused by Praying (Peer Review)

Teknik Mengatasi Data Hilang dengan Metode Algoritma EM

Jurnal Sains Matematika dan Statistika, 2017

Data hilang merupakan informasi yang tidak tersedia untuk sebuah kasus tertentu. Salah satu metod... more Data hilang merupakan informasi yang tidak tersedia untuk sebuah kasus tertentu. Salah satu metode yang digunakan untuk mengatasi data hilang adalah Algoritma EM. Penelitian ini bertujuan untuk mendapatkan teknik mengatasi data hilang dengan metode Algoritma EM. Metode Algoritma EM merupakan sebuah metode optimisasi iteratif yang terbagi atas dua tahapan yaitu tahap ekspektasi dan tahap maksimisasi. Data yang digunakan pada penelitian ini adalah data matriks

Spatial Autocorrelation Analysis of Natuna’s Capture Fisheries Production through Moran’s I and LISA Indices

Proceedings of the 1st Maritime, Economics, and Business International Conference, MEBIC 2021, 24-25 September 2021, Tanjungpinang City, Riau Islands Province, Indonesia, 2021

The Natuna Regency has a great potential for blue economy development in the form of capture fish... more The Natuna Regency has a great potential for blue economy development in the form of capture fisheries. Currently, only a small part of the potential is actualized and contributes to the regional economy. This study aims to study the spatial aspects of capture fisheries production in the Natuna Regency. Two indices, namely the Moran's I and LISA indices were used to examine the presence of autocorrelation in 15 districts in the Natuna Regency in terms of capture fisheries production. Results showed that there was no spatial autocorrelation on a global scale (Moran's I), while on a local scale (LISA), it is indicated that there were clusters in several districts. It was also found that Bunguran Barat District has great potential for capture fisheries. The result of this study is expected to contribute to the development of the Natuna capture fisheries thus increasing its contribution to economic development.

Fenomenahujan Dalam Perspektif Sains Dan Al-Qur'An

Analysis of motor speed three phase induction using Harriot and Smith method

Journal of Engineering and Applied Sciences, 2018

The Analisys of Daily Temparature in Pekanbaru City Using Weibull, Gamma, and Nakagami Distribution

International Journal of Mathematics Trends and Technology, 2021

Data mining applied about polygamy using sentiment analysis on Twitters in Indonesian perception

Received Mar 2, 2020 Revised May 20, 2021 Accepted Jun 19, 2021 Polygamy remains one of the inter... more Received Mar 2, 2020 Revised May 20, 2021 Accepted Jun 19, 2021 Polygamy remains one of the interesting key topics in various society, especially Indonesia. Polygamy is the act of marrying multiple spouses that means having more one wife at the same time, is common case in worldwide. In this problem, the most of Muslim in Indonesia adopt Islamic law that let men to do the polygamy with certain requirements. In worldwide communities, this has been a prominent feature and has become the subject of numerous books, heated debates, journal articles, discussion papers, and so on. Furthermore, in Indonesia the polygamous marriage has recently become a heated topic. Despite controversy, Indonesia’s law, of recent, allows people for doing polygamy in certain conditions. Because the polygamy is often debated, this study focuses on assessment of Indonesian’s perceptions through sentiment analysis and would determine people’s perception about polygamy issue from 500 tweets on Twitter. To conclu...

Optimal control feedback Nash in the scalar infinite non-cooperative dynamic game with discount factor

Global Journal of Pure and Applied Sciences, 2016

In this research was discuss about equation of dynamic system game with infinite time for scalar ... more In this research was discuss about equation of dynamic system game with infinite time for scalar case with discount factor. Based system of dynamic game formed algebraic Riccati equation for infinite time. Furthermore, based solution from algebraic Riccati equation, formed feedback Nash for each player. Then analyzed about stability of system with substitution feedback Nash to differential equation dynamic system. Moreover, for existence solution and uniqueness solution of 3464 Nilwan Andiraja et al feedback Nash, resulting for and founded solution for feedback Nash and there is one feedback Nash solution which stabilize dynamic system.

Analysis the effect of mathematics subjects on islamic school in pekanbaru region using spatial analysis

International Journal of Engineering, 2019

This study focus to reveal the capabilities the students of Madrasah and Sekolah Islam in underst... more This study focus to reveal the capabilities the students of Madrasah and Sekolah Islam in understanding mathematics subjects throughout the Pekanbaru area using spatial analysis. The national examination mathematic will be mapped to all regions in Pekanbaru. The same mapping for public schools will also be produced, so that a comparison of the national examination mathematict (NEM) for the three types of schools can reveal more clearly the ability of Islamic school students to understand mathematics. Study results also indicated that students of Madrasah has the highest a NEM on the small ares in north and isolated areas on the south Pekanbaru region. While students of Sekolah Islam have the higest NEM on few ares in west Pekanbaru region. However students of the Public schools have the best abilty in understanding mathematics subjects, especially in a few area on the south Pekanbaru region.

Music interest classification of twitter users using support vector machine

Journal of theoretical and applied information technology, 2017

Distribusi Weibull Vs Distribusi Rayleigh Pada Pemodelan Kecepatan Angin

Angin merupakan sumber energy yang tak-terhingga. Menjawab tantangan krisis energy dampak lingkun... more Angin merupakan sumber energy yang tak-terhingga. Menjawab tantangan krisis energy dampak lingkungan yang diakibatkan oleh angin saat ini, maka perlu adanya upaya memodelkan kecepatan angin dalam mengeksplor potensi tersebut. Makalah ini membahas tentang dua distribusi yaitu Weibull dan Rayleigh dalam menentukan model distribusi yang sesuai untuk data kecepatan angin di Pekanbaru. Estimasi parameter yang digunakan adalah metode maksimum likelihood dan menggunakan uji kebaikan ( Goodness of Fit ) AIC ( Akaike’s Information Criterion ) . Hasil yang diperoleh menunjukkan bahwa, model distribusi Weibull lebih sesuai digunakan untuk data kecepatan angin di Pekanbaru, karena nilai AIC yang diperoleh lebih kecil dibandingkan nilai AIC dari distribusi Rayleigh

The analysis relationship of poverty, unemployment and population with the rates of crime using geographically weighted regression (GWR) in Riau province

Applied Mathematical Sciences, 2020

This article is distributed under the Creative Commons by-nc-nd Attribution License.

Achievement goals, PERMA and life satisfaction: A mediational analysis

İlköğretim Online, 2020

This study explores the correlation between achievement goals and positive emotion, engagement, r... more This study explores the correlation between achievement goals and positive emotion, engagement, relationship, meaning and accomplishment (PERMA) which might affect life satisfaction for Indonesian students in English education programs. The present study employed 260 of Indonesian students in English education programs, selected by using cluster random sampling. The students were enrolled in undergraduate 223 (85.8%) and postgraduate 37 (14.2%). The study follows a correlational research design to measure the degree of relationship between achievement goals, PERMA and life satisfaction. We employed confirmatory factor analysis (CFA) with AMOS 18 to analyze the data. Results indicate that achievement goals and PERMA influence positively life satisfaction. Moreover, PERMA is positive full mediators meaning that students who adopt achievement goals with high PERMA would probably have good life satisfaction. In conclusion, PERMA and achievement goals have an positive effect on students' life satisfaction.

The Extreme Currency Exchange Rate in South East Asia Using Classical and Bayesian Methods

Research Journal of Applied Sciences, 2019

Operation Continuous Function and Lipschitz Function on Partial Metric Space

Research Journal of Applied Sciences, 2019

Total Vertex Irregularity Strength of Comb Product Graph of Pm and Cn

Research Journal of Applied Sciences, 2019

Augmented Reality Technology for Learning Shalah

International Journal of Innovative Technology and Exploring Engineering, 2019

The scarcity of Islamic learning materials especially guidance to do shalah using animation techn... more The scarcity of Islamic learning materials especially guidance to do shalah using animation technology with interactive interfaces become a reason to the implementation of thisstudy. In this study, we integrates Augmented Reality (AR) elements into a children’s learning book, named AR SHALAT 4D Educational Book. It has been designed in ‘Markerless-based AR’ using mobile devices. The study was tested on an audience of randomly selected children aged 5-6 years and give the conclusion that, AR prayer is a suitable app for solving problems for prayer. Furthermore, this app can be used as one of the forms of mobile learning to the Muslim community regardless of age and background limits.

Continuity Function on Partial Metric Space

Journal of Mathematics and Statistics, 2016

Ordered pairs form of a metric space (S,d), where d is the metric on a nonempty set S. Concept of... more Ordered pairs form of a metric space (S,d), where d is the metric on a nonempty set S. Concept of partial metric space is a minimal generalization of a metric space where each x∈S,d(x,x) does not need to be zero, in other terms is known as non-self-distance. Axiom obtained from the generalization is following properties p(x,x)≤p(x,y) for every x,y∈S. The results of this paper are few studies in the form of definitions and theorems concerning continuity function on partial metric space.

The Modelling Number of Daily Death Covid 19 Data Using Some of Two and One Parameter Distributions in Indonesia

International Journal of Mathematics Trends and Technology, Dec 31, 2022

The outbreak of COVID-19 pandemic has caused many deaths. The number of deaths that occur randoml... more The outbreak of COVID-19 pandemic has caused many deaths. The number of deaths that occur randomly per day has caused various problems, including reduced population, increased land for graves, and increased fear of the situation that has arisen which indirectly impacts decreased performance which ultimately weakens a country's economy. However, it is the concern of governments and others' responsibilities to provide the correct statistics and figures to take any practicable necessary steps. Where the statistical literature supposes that a model governs every real phenomenon, once we know the model, we can evaluate the dilemma. Therefore, in this article, we compare and analyze the frequency of a number of death from COVID-19 in Indonesia using the six probability modeling. Probability modeling will be carried out using six distributions, namely Weibull, Gamma, Log Normal, Amarendra, Rani and Akash will be used in this study. The maximum likelihood method will be used to get the estimated parameter from the models used in this study. The distribution will be selected based on some methods of Good of Fit Test namely graphical (pdf plot and cumulative distribution function (CDF) plot) and numerical (Akaike Information Criterion (AIC) and Bayesian Information Criterion (BIC), and Log Likelihood (Log-L)). In most cases, graphical methods give the same results but their AIC and BIC results are different. The most suitable result is selected as the distribution with the lowest AIC and BIC values. In general, the Weibull distribution has been chosen as the best model.

Evaluation of the Curriculum of Junior High School Mathematics Subject Using Spatial Analysis in the Regions of Pekanbaru

International journal of educational methodology, May 15, 2022

Evaluation of the K-13 curriculum (2013 Curriculum) on the value of the national mathematics exam... more Evaluation of the K-13 curriculum (2013 Curriculum) on the value of the national mathematics examination "Nilai Ebtanas Murni" (NEM) in every State Junior High School needs to be carried out thoroughly in order to improve the quality of education. This study uses spatial analysis to evaluate the curriculum and determine the development of NEM scores in the school year. Furthermore, the kriging interpolation method via surfer software was used to generate scores. The results showed that the 2015 K-13 mathematics curriculum did not give good results based on the 36-68 NEM score interval for the entire Pekanbaru area. In addition, the curriculum only gives good results for a small area in the north and south. In 2016, the curriculum which was accompanied by the entry of the new education unit level curriculum "Kurikulum Tingkat Satuan Pendidikan" (KTSP) showed a significant change in the NEM value. Although most of these areas experienced an increase in scores, the intervals still ranged from 36-68. The total revision of the K-13 curriculum carried out and used in 2017 showed a significant increase in scores for all regions with an interval of 68-84 scores. In conclusion, this study shows that the revision of the K-13 curriculum is the right step to produce quality mathematics learning.

Spatial Analysis Application to Reveal the DIiminishing Crime Rate Phenomenon Caused by Praying (Peer Review)

Teknik Mengatasi Data Hilang dengan Metode Algoritma EM

Jurnal Sains Matematika dan Statistika, 2017

Data hilang merupakan informasi yang tidak tersedia untuk sebuah kasus tertentu. Salah satu metod... more Data hilang merupakan informasi yang tidak tersedia untuk sebuah kasus tertentu. Salah satu metode yang digunakan untuk mengatasi data hilang adalah Algoritma EM. Penelitian ini bertujuan untuk mendapatkan teknik mengatasi data hilang dengan metode Algoritma EM. Metode Algoritma EM merupakan sebuah metode optimisasi iteratif yang terbagi atas dua tahapan yaitu tahap ekspektasi dan tahap maksimisasi. Data yang digunakan pada penelitian ini adalah data matriks

Spatial Autocorrelation Analysis of Natuna’s Capture Fisheries Production through Moran’s I and LISA Indices

Proceedings of the 1st Maritime, Economics, and Business International Conference, MEBIC 2021, 24-25 September 2021, Tanjungpinang City, Riau Islands Province, Indonesia, 2021

The Natuna Regency has a great potential for blue economy development in the form of capture fish... more The Natuna Regency has a great potential for blue economy development in the form of capture fisheries. Currently, only a small part of the potential is actualized and contributes to the regional economy. This study aims to study the spatial aspects of capture fisheries production in the Natuna Regency. Two indices, namely the Moran's I and LISA indices were used to examine the presence of autocorrelation in 15 districts in the Natuna Regency in terms of capture fisheries production. Results showed that there was no spatial autocorrelation on a global scale (Moran's I), while on a local scale (LISA), it is indicated that there were clusters in several districts. It was also found that Bunguran Barat District has great potential for capture fisheries. The result of this study is expected to contribute to the development of the Natuna capture fisheries thus increasing its contribution to economic development.

Fenomenahujan Dalam Perspektif Sains Dan Al-Qur'An

Analysis of motor speed three phase induction using Harriot and Smith method

Journal of Engineering and Applied Sciences, 2018

The Analisys of Daily Temparature in Pekanbaru City Using Weibull, Gamma, and Nakagami Distribution

International Journal of Mathematics Trends and Technology, 2021

Data mining applied about polygamy using sentiment analysis on Twitters in Indonesian perception

Received Mar 2, 2020 Revised May 20, 2021 Accepted Jun 19, 2021 Polygamy remains one of the inter... more Received Mar 2, 2020 Revised May 20, 2021 Accepted Jun 19, 2021 Polygamy remains one of the interesting key topics in various society, especially Indonesia. Polygamy is the act of marrying multiple spouses that means having more one wife at the same time, is common case in worldwide. In this problem, the most of Muslim in Indonesia adopt Islamic law that let men to do the polygamy with certain requirements. In worldwide communities, this has been a prominent feature and has become the subject of numerous books, heated debates, journal articles, discussion papers, and so on. Furthermore, in Indonesia the polygamous marriage has recently become a heated topic. Despite controversy, Indonesia’s law, of recent, allows people for doing polygamy in certain conditions. Because the polygamy is often debated, this study focuses on assessment of Indonesian’s perceptions through sentiment analysis and would determine people’s perception about polygamy issue from 500 tweets on Twitter. To conclu...

Optimal control feedback Nash in the scalar infinite non-cooperative dynamic game with discount factor

Global Journal of Pure and Applied Sciences, 2016

In this research was discuss about equation of dynamic system game with infinite time for scalar ... more In this research was discuss about equation of dynamic system game with infinite time for scalar case with discount factor. Based system of dynamic game formed algebraic Riccati equation for infinite time. Furthermore, based solution from algebraic Riccati equation, formed feedback Nash for each player. Then analyzed about stability of system with substitution feedback Nash to differential equation dynamic system. Moreover, for existence solution and uniqueness solution of 3464 Nilwan Andiraja et al feedback Nash, resulting for and founded solution for feedback Nash and there is one feedback Nash solution which stabilize dynamic system.

Analysis the effect of mathematics subjects on islamic school in pekanbaru region using spatial analysis

International Journal of Engineering, 2019

This study focus to reveal the capabilities the students of Madrasah and Sekolah Islam in underst... more This study focus to reveal the capabilities the students of Madrasah and Sekolah Islam in understanding mathematics subjects throughout the Pekanbaru area using spatial analysis. The national examination mathematic will be mapped to all regions in Pekanbaru. The same mapping for public schools will also be produced, so that a comparison of the national examination mathematict (NEM) for the three types of schools can reveal more clearly the ability of Islamic school students to understand mathematics. Study results also indicated that students of Madrasah has the highest a NEM on the small ares in north and isolated areas on the south Pekanbaru region. While students of Sekolah Islam have the higest NEM on few ares in west Pekanbaru region. However students of the Public schools have the best abilty in understanding mathematics subjects, especially in a few area on the south Pekanbaru region.

Music interest classification of twitter users using support vector machine

Journal of theoretical and applied information technology, 2017

Distribusi Weibull Vs Distribusi Rayleigh Pada Pemodelan Kecepatan Angin

Angin merupakan sumber energy yang tak-terhingga. Menjawab tantangan krisis energy dampak lingkun... more Angin merupakan sumber energy yang tak-terhingga. Menjawab tantangan krisis energy dampak lingkungan yang diakibatkan oleh angin saat ini, maka perlu adanya upaya memodelkan kecepatan angin dalam mengeksplor potensi tersebut. Makalah ini membahas tentang dua distribusi yaitu Weibull dan Rayleigh dalam menentukan model distribusi yang sesuai untuk data kecepatan angin di Pekanbaru. Estimasi parameter yang digunakan adalah metode maksimum likelihood dan menggunakan uji kebaikan ( Goodness of Fit ) AIC ( Akaike’s Information Criterion ) . Hasil yang diperoleh menunjukkan bahwa, model distribusi Weibull lebih sesuai digunakan untuk data kecepatan angin di Pekanbaru, karena nilai AIC yang diperoleh lebih kecil dibandingkan nilai AIC dari distribusi Rayleigh

The analysis relationship of poverty, unemployment and population with the rates of crime using geographically weighted regression (GWR) in Riau province

Applied Mathematical Sciences, 2020

This article is distributed under the Creative Commons by-nc-nd Attribution License.

Achievement goals, PERMA and life satisfaction: A mediational analysis

İlköğretim Online, 2020

This study explores the correlation between achievement goals and positive emotion, engagement, r... more This study explores the correlation between achievement goals and positive emotion, engagement, relationship, meaning and accomplishment (PERMA) which might affect life satisfaction for Indonesian students in English education programs. The present study employed 260 of Indonesian students in English education programs, selected by using cluster random sampling. The students were enrolled in undergraduate 223 (85.8%) and postgraduate 37 (14.2%). The study follows a correlational research design to measure the degree of relationship between achievement goals, PERMA and life satisfaction. We employed confirmatory factor analysis (CFA) with AMOS 18 to analyze the data. Results indicate that achievement goals and PERMA influence positively life satisfaction. Moreover, PERMA is positive full mediators meaning that students who adopt achievement goals with high PERMA would probably have good life satisfaction. In conclusion, PERMA and achievement goals have an positive effect on students' life satisfaction.

The Extreme Currency Exchange Rate in South East Asia Using Classical and Bayesian Methods

Research Journal of Applied Sciences, 2019

Operation Continuous Function and Lipschitz Function on Partial Metric Space

Research Journal of Applied Sciences, 2019

Total Vertex Irregularity Strength of Comb Product Graph of Pm and Cn

Research Journal of Applied Sciences, 2019

Augmented Reality Technology for Learning Shalah

International Journal of Innovative Technology and Exploring Engineering, 2019

The scarcity of Islamic learning materials especially guidance to do shalah using animation techn... more The scarcity of Islamic learning materials especially guidance to do shalah using animation technology with interactive interfaces become a reason to the implementation of thisstudy. In this study, we integrates Augmented Reality (AR) elements into a children’s learning book, named AR SHALAT 4D Educational Book. It has been designed in ‘Markerless-based AR’ using mobile devices. The study was tested on an audience of randomly selected children aged 5-6 years and give the conclusion that, AR prayer is a suitable app for solving problems for prayer. Furthermore, this app can be used as one of the forms of mobile learning to the Muslim community regardless of age and background limits.

Continuity Function on Partial Metric Space

Journal of Mathematics and Statistics, 2016

Ordered pairs form of a metric space (S,d), where d is the metric on a nonempty set S. Concept of... more Ordered pairs form of a metric space (S,d), where d is the metric on a nonempty set S. Concept of partial metric space is a minimal generalization of a metric space where each x∈S,d(x,x) does not need to be zero, in other terms is known as non-self-distance. Axiom obtained from the generalization is following properties p(x,x)≤p(x,y) for every x,y∈S. The results of this paper are few studies in the form of definitions and theorems concerning continuity function on partial metric space.