CAUCHY: Jurnal Matematika Murni dan Aplikasi最新文献_第3页

Covid-19 Data Analysis in Tarakan with Poisson Regression and Spatial Poisson Process 基于泊松回归和空间泊松过程的Tarakan地区新冠肺炎数据分析

CAUCHY: Jurnal Matematika Murni dan Aplikasi Pub Date : 2023-05-24 DOI: 10.18860/ca.v7i4.19653

A. Sofro, Ika Nurwanitantya Wardani, K. N. Khikmah

{"title":"Covid-19 Data Analysis in Tarakan with Poisson Regression and Spatial Poisson Process","authors":"A. Sofro, Ika Nurwanitantya Wardani, K. N. Khikmah","doi":"10.18860/ca.v7i4.19653","DOIUrl":"https://doi.org/10.18860/ca.v7i4.19653","url":null,"abstract":"COVID-19 entered Indonesia in March 2020 and included North Kalimantan Province, Tarakan. COVID-19 cases have outspread in Tarakan. The cause of the outspread and the patterns were not known yet. One relevant approach was to use Generalized Linear Models. The two methods are Poisson Regression and Stochastic with Spatial Poisson Process. The variables used were rainfall, population density, and temperature in each village in Tarakan. The Poisson Regression analysis founds that only one factor affected temperature. Then, the results were refined with the Spatial Poisson Process, where in addition to the influencing factors also, the distribution patterns are obtained. The analysis showed that the pattern of case distribution was included in the non-homogeneous Poisson process criteria. Then the model of the case density intensity was obtained using regression. From the model, it was known that the covariate variables significantly influence rainfall and temperature. Compared with general Poisson regression analysis, the results showed that only the average temperature variables had a significant effect. Thus, a better method was used, namely the Spatial Poisson Process. It was also shown by the two models' AIC values, where the AIC value of the Spatial Poisson Process model was smaller than the Poisson Regression.","PeriodicalId":388519,"journal":{"name":"CAUCHY: Jurnal Matematika Murni dan Aplikasi","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114869743","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}

引用次数: 0

On the Dominant Local Resolving Set of Vertex Amalgamation Graphs 顶点合并图的优势局部解析集

CAUCHY: Jurnal Matematika Murni dan Aplikasi Pub Date : 2023-05-24 DOI: 10.18860/ca.v7i4.18891

R. Umilasari, L. Susilowati, S. Slamin, S. Prabhu

{"title":"On the Dominant Local Resolving Set of Vertex Amalgamation Graphs","authors":"R. Umilasari, L. Susilowati, S. Slamin, S. Prabhu","doi":"10.18860/ca.v7i4.18891","DOIUrl":"https://doi.org/10.18860/ca.v7i4.18891","url":null,"abstract":"Basically, the new topic of the dominant local metric dimension which be symbolized by Ddim_l (H) is a combination of two concepts in graph theory, they were called the local metric dimension and dominating set. There are some terms in this topic that is dominant local resolving set and dominant local basis. An ordered subset W_l is said a dominant local resolving set of G if W_l is dominating set and also local resolving set of G. While dominant local basis is a dominant local resolving set with minimum cardinality. This study uses literature study method by observing the local metric dimension and dominating number before detecting the dominant local metric dimension of the graphs. After obtaining some new results, the purpose of this research is how the dominant local metric dimension of vertex amalgamation product graphs. Some special graphs that be used are star, friendship, complete graph and complete bipartite graph. Based on all observation results, it can be said that the dominant local metric dimension for any vertex amalgamation product graph depends on the dominant local metric dimension of the copied graphs and how the terminal vertex is constructed","PeriodicalId":388519,"journal":{"name":"CAUCHY: Jurnal Matematika Murni dan Aplikasi","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127262386","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}

引用次数: 0

Spatial Analysis of Dengue Disease in Jakarta Province 雅加达省登革热的空间分析

CAUCHY: Jurnal Matematika Murni dan Aplikasi Pub Date : 2023-05-24 DOI: 10.18860/ca.v7i4.17423

Muhamad Sobari, Gede Nyoman, Mindra Jaya, B. N. Ruchjana

引用次数: 0

On the study of Rainbow Antimagic Coloring of Special Graphs 特殊图的彩虹反幻着色研究

CAUCHY: Jurnal Matematika Murni dan Aplikasi Pub Date : 2023-05-24 DOI: 10.18860/ca.v7i4.17836

D. Dafik, Riniatul Nur Wahidah, E. R. Albirri, S. Husain

引用次数: 0

Comparing Several Missing Data Estimation Methods in Linear Regression;Real Data Example and A Simulation Study 线性回归中几种缺失数据估计方法的比较;真实数据实例与仿真研究

CAUCHY: Jurnal Matematika Murni dan Aplikasi Pub Date : 2023-05-24 DOI: 10.18860/ca.v7i4.20548

A. Fitrianto, Jap Ee Jia, B. Susetyo, L. Rahman

{"title":"Comparing Several Missing Data Estimation Methods in Linear Regression;Real Data Example and A Simulation Study","authors":"A. Fitrianto, Jap Ee Jia, B. Susetyo, L. Rahman","doi":"10.18860/ca.v7i4.20548","DOIUrl":"https://doi.org/10.18860/ca.v7i4.20548","url":null,"abstract":"Analysis on incomplete could lead to biased estimation when using standard statistical procedure since it ignores the missing observations. The disadvantage of ignoring missing data is that the researcher might not have enough data to conduct an analysis. The main objective of the study is to compare the performance between listwise deletion (LD), mean substitution (MS) and multiple imputation (MI) method in estimating parameters. The performance will be measured through bias, standard error and 95% confidence interval of interested estimates for handling missing data with 10% missing observations. A complete empirical data set was used and assumed as population data. Ten percent of total observations in the population ere set as missing arbitrarily by generating random numbers from a uniform distribution, . Then, bias of parameter estimates and confidence interval of parameter estimates are calculated to compare the three methods. A Monte Carlo simulation was carried out to know the properties of missing data and investigated using simulated random numbers. Simulation of 1000 sampled data with 20, 50, and 100 observations and each sample is set to have 10% missing observations. Standard statistical analyses are run for each missing data and get the average of parameter estimates to calculate the bias and standard error of parameter estimates for every missing data method. The analysis was conducted by using SAS version 9.2. It was found that the MI method provided the smallest bias and standard error of parameter estimates and a narrower confidence interval compared to the LD and MS methods Meanwhile, the LD method gives a smaller bias of parameter estimates and standard error for small sample size of missing data. And, MS method is strongly recommended not to use for handling missing data because it will result in large bias and standard error of parameter estimates.","PeriodicalId":388519,"journal":{"name":"CAUCHY: Jurnal Matematika Murni dan Aplikasi","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125666921","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}

引用次数: 0

A Fractional-Order Leslie-Gower Model with Fear and Allee Effect 具有恐惧和Allee效应的分数阶Leslie-Gower模型

CAUCHY: Jurnal Matematika Murni dan Aplikasi Pub Date : 2023-05-24 DOI: 10.18860/ca.v7i4.17336

Adin Lazuardy Firdiansyah, Dewi Rosikhoh

引用次数: 0

Systematic Literature Review on Adjustable Robust Shortest Path Problem 鲁棒可调最短路径问题的系统文献综述

CAUCHY: Jurnal Matematika Murni dan Aplikasi Pub Date : 2023-05-24 DOI: 10.18860/ca.v7i4.17648

Wida Nurul Fauziyah, D. Chaerani, H. Napitupulu

{"title":"Systematic Literature Review on Adjustable Robust Shortest Path Problem","authors":"Wida Nurul Fauziyah, D. Chaerani, H. Napitupulu","doi":"10.18860/ca.v7i4.17648","DOIUrl":"https://doi.org/10.18860/ca.v7i4.17648","url":null,"abstract":"In real-world optimization problems, effective path planning is important. The Shortest Path Problem (SPP) model is a classical operations research that can be applied to determine an efficient path from the starting point to the end point in a plan. However, in the real world, uncertainty is often encountered and must be faced. Significant uncertainty factors in the problem of determining the shortest path are problems that are difficult to predict, therefore new criteria and appropriate models are needed to deal with uncertainty along with the required efficient solution. The uncertainty factor can be formulated using an uncertain SPP optimization model, assuming parameters that are not known with certainty but are in an uncertain set. Problems with uncertainty in mathematical optimization can be solved using Robust Optimization (RO). RO is a methodology in dealing with the problem of data uncertainty caused by errors in data measurement. The uncertainty in the linear optimization problem model can be formed by loading the uncertainty that only exists in the constraint function by assuming its uncertainty using the Robust Counterpart (RC) methodology. In this paper, we will review the literature on the two-stage optimization model for the SPP problem using an Adjustable Robust Counterpart (ARC).","PeriodicalId":388519,"journal":{"name":"CAUCHY: Jurnal Matematika Murni dan Aplikasi","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124123776","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}

引用次数: 0

Determination of Term Life Insurance Premiums with Varying Interest Rates Following The CIR Model and Varying Benefits Value 基于CIR模型和变动收益价值的变利率定期寿险保费确定

CAUCHY: Jurnal Matematika Murni dan Aplikasi Pub Date : 2023-05-24 DOI: 10.18860/ca.v7i4.20542

D. Puspita, I. Purnaba, D. Lesmana

{"title":"Determination of Term Life Insurance Premiums with Varying Interest Rates Following The CIR Model and Varying Benefits Value","authors":"D. Puspita, I. Purnaba, D. Lesmana","doi":"10.18860/ca.v7i4.20542","DOIUrl":"https://doi.org/10.18860/ca.v7i4.20542","url":null,"abstract":"Term life insurance is an insurance that provides protection for a certain period that has been agreed upon in the policy. The policy is an agreement that contains the participant's obligation to pay premiums contributions to the insurance company and the insurance company's obligation to pay benefits in the event of a risk to the insurance participant as agreed in the policy. Interest rates will influence the calculation of premium value and benefits in the long term. So we need a model of interest rates that will change by time. One of the models that can be used is the CIR model. This research purposes to simulate the CIR model that will be carried out to determine interest rates for calculating term life insurance premiums for five years, with premiums paid at the beginning of the 1/m interval or monthly premium payments and benefits paid at the end of the 1/m interval when the participant dies. The case that will be discussed is when the benefit various. The results of this study are the CIR model can be applied to calculate the term life insurance premiums for five years and the premium calculation results show that the amount of the premium increase every year with varying benefits.","PeriodicalId":388519,"journal":{"name":"CAUCHY: Jurnal Matematika Murni dan Aplikasi","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133507884","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}

引用次数: 0

On Irregular Colorings of Unicyclic Graph Family 关于单环图族的不规则着色

CAUCHY: Jurnal Matematika Murni dan Aplikasi Pub Date : 2023-05-24 DOI: 10.18860/ca.v7i4.16917

A. I. Kristiana, D. Dafik, Qurrotul A’yun, R. Adawiyah, R. Alfarisi

引用次数: 0

On the Application of Noiseless Steganography and Elliptic Curves Cryptography Digital Signature Algorithm Methods in Securing Text Messages 无噪声隐写和椭圆曲线加密数字签名算法在短信安全中的应用

CAUCHY: Jurnal Matematika Murni dan Aplikasi Pub Date : 2022-10-11 DOI: 10.18860/ca.v7i3.17358

Juhari Juhari, Mohamad Febry Andrean

{"title":"On the Application of Noiseless Steganography and Elliptic Curves Cryptography Digital Signature Algorithm Methods in Securing Text Messages","authors":"Juhari Juhari, Mohamad Febry Andrean","doi":"10.18860/ca.v7i3.17358","DOIUrl":"https://doi.org/10.18860/ca.v7i3.17358","url":null,"abstract":"Elliptic curve cryptography includes symmetric key cryptography systems that base their security on mathematical problems of elliptic curves. There are several ways that can be used to define the elliptic curve equation that depends on the infinite field used, one of which is the infinite field prima ( where ). Elliptic curve cryptography can be used for multiple protocol purposes, digital signatures, and encryption schemes.The purpose of this study is to determine the process of hiding encrypted messages using the Noiseless Steganography method as well as the generation of private keys and public keys and the process of verifying the validity of the Elliptic Curves Cryptography Digital Signature Algorithm (ECDSA). The result of this thesis is that a line graph is obtained that store or hides a message using the steganography method and a message authenticity from the process of key generation and verification of validity using the ECDSA method. By selecting three samples consisting of one test sample and two differentiating samples, a line graph, an MD5 hash value, and a value at the point are obtained different. Successively obtained values to message “Matematika 2018”, “MATEMATIKA 2018”, and “2018 matematika” are and . The discussion in this thesis only covers the elliptic curves on prime finite field. So, for the next thesis, the next researcher can do a discussion about the elliptic curve on the finite field or the application of elliptic curve cryptography and other steganographic methods","PeriodicalId":388519,"journal":{"name":"CAUCHY: Jurnal Matematika Murni dan Aplikasi","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117189583","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}

引用次数: 0