ComTech Pub Date : 2017-03-31 DOI: 10.21512/COMTECH.V8I1.3779

C. Huda, Osel Dharmawan Awang, Raymond Raymond, Raynaldi Raynaldi

引用次数: 2

Complexitor: An Educational Tool for Learning Algorithm Time Complexity in Practical Manner Complexitor:一个实用的学习算法时间复杂度的教育工具

ComTech Pub Date : 2017-03-31 DOI: 10.21512/COMTECH.V8I1.3783

E. Elvina, Oscar Karnalim

引用次数: 15

Audio Visual Media Components in Educational Game for Elementary Students 小学教育游戏中的视听媒体成分

ComTech Pub Date : 2016-12-31 DOI: 10.21512/COMTECH.V7I4.2515

Meilani Hartono, A. Santoso, Crisantus Lebu Raya, B. Yulianto, S. Suwarno

引用次数: 2

The Occupancy Rate Modeling of Kendari Hotel Room using Mexican Hat Transformation and Partial Least Squares 基于墨西哥帽变换和偏最小二乘的Kendari酒店客房入住率建模

ComTech Pub Date : 2016-12-31 DOI: 10.21512/COMTECH.V7I4.3766

M. Ohyver, Herena Pudjihastuti

{"title":"The Occupancy Rate Modeling of Kendari Hotel Room using Mexican Hat Transformation and Partial Least Squares","authors":"M. Ohyver, Herena Pudjihastuti","doi":"10.21512/COMTECH.V7I4.3766","DOIUrl":"https://doi.org/10.21512/COMTECH.V7I4.3766","url":null,"abstract":"Partial Least Squares (PLS) method was developed in 1960 by Herman Wold. The method particularly suits with construct a regression model when the number of independent variables is many and highly collinear. The PLS can be combined with other methods, one of which is a Continuous Wavelet Transformation (CWT). By considering that the presence of outliers can lead to a less reliable model, and this kind of transformation may be required at a stage of pre-processing, the data is free of noise or outliers. Based on the previous study, Kendari hotel room occupancy rate was affected by the outlier, and it had a low value of R2. Therefore, this research aimed to obtain a good model by combining the PLS method and CWT transformation using the Mexican Hats them other wavelet of CWT. The research concludes that merging the PLS and the Mexican Hat transformation has resulted in a better model compared to the model that combined the PLS and the Haar wavelet transformation as shown in the previous study. The research shows that by changing the mother of the wavelet, the value of R2 can be improved significantly. The result provides information on how to increase the value of R2. The other advantage is the information for hotel managements to notice the age of the hotel, the maximum rates, the facilities, and the number of rooms to increase the number of visitors.","PeriodicalId":31095,"journal":{"name":"ComTech","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67822778","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

Single Document Automatic Text Summarization using Term Frequency-Inverse Document Frequency (TF-IDF) 基于词频-逆文档频率(TF-IDF)的单文档自动文本摘要

ComTech Pub Date : 2016-12-31 DOI: 10.21512/COMTECH.V7I4.3746

Hans Christian, Mikhael Pramodana Agus, Derwin Suhartono

引用次数: 159

Bragg Resonance around the Coast of Hardwall 哈德沃尔海岸附近的布拉格共振

ComTech Pub Date : 2016-12-31 DOI: 10.21512/COMTECH.V7I4.2547

Viska Noviantri, R. N. Rachmawati

{"title":"Bragg Resonance around the Coast of Hardwall","authors":"Viska Noviantri, R. N. Rachmawati","doi":"10.21512/COMTECH.V7I4.2547","DOIUrl":"https://doi.org/10.21512/COMTECH.V7I4.2547","url":null,"abstract":"Basically, when waves pass an uneven basis, then this wave will be split into transmission and reflection waves. First of all, it will be shown that a sinusoidal seabed can lead to the phenomenon of Bragg resonance. Bragg resonance occurs when the wave-length comes at twice the wave-length of a sinusoidal basis. The method used to obtain approximation solution is a multi-scale asymptotic expansion method. A research on the effect of Bragg resonance on sinusoidal basis had been studied. Sinusoidal basis can reduce the amplitude of the incoming wave so that the amplitude of the wave transmission is quite small. In these researcher, the coast is assumed ideal and can absorb all the energy of the wave transmission. If the beach can reflect waves, this indicates that the existence of sinusoidal basis is more harmful to the coast. This mechanism relies on the distance between the base sinusoidal and beaches. The present research will examined the influence of the base, when there was a beach of hard-wall on the right, which was perfectly capable of reflecting waves. Having regard to the phase difference, from super positioned waves when they hit the beach, so it can determine the safert and the most dangerous distance.","PeriodicalId":31095,"journal":{"name":"ComTech","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67821243","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

Perception Analysis of Desktop and Mobile Service Website 桌面和移动服务网站的感知分析

ComTech Pub Date : 2016-12-31 DOI: 10.21512/comtech.v7i4.3753

Rizqiyatul Khoiriyah

引用次数: 0

The Impact of the Implementation of Business Intelligent to Support Decision-Making in the American Banking Industry: a Literature Review 实施商业智能对美国银行业决策支持的影响:文献综述

ComTech Pub Date : 2016-12-31 DOI: 10.21512/COMTECH.V7I4.2530

A. M. Sundjaja, Veronica Veronica

引用次数: 0

Winsorized Modified One Step M-Estimator As a Measure of the Central Tendency in the Alexander-Govern Test 在Alexander-Govern检验中，Winsorized改进的一步m估计量作为集中趋势的度量

ComTech Pub Date : 2016-09-30 DOI: 10.21512/COMTECH.V7I3.2505

Tobi Kingsley Ochuko, Suhaida Abdullah, Zakiyah Zain, S. S. S. Yahaya

{"title":"Winsorized Modified One Step M-Estimator As a Measure of the Central Tendency in the Alexander-Govern Test","authors":"Tobi Kingsley Ochuko, Suhaida Abdullah, Zakiyah Zain, S. S. S. Yahaya","doi":"10.21512/COMTECH.V7I3.2505","DOIUrl":"https://doi.org/10.21512/COMTECH.V7I3.2505","url":null,"abstract":"This research dealt with making comparison of the independent group tests with the use of parametric technique. This test used mean as its central tendency measure. It was a better alternative to the ANOVA, the Welch test and the James test, because it gave a good control of Type I error rates and high power with ease in its calculation, for variance heterogeneity under a normal data. But the test was found not to be robust to non-normal data. Trimmed mean was used on the test as its central tendency measure under non-normality for two group condition, but as the number of groups increased above two, the test failed to give a good control of Type I error rates. As a result of this, the MOM estimator was applied on the test as its central tendency measure and is not influenced by the number of groups. However, under extreme condition of skewness and kurtosis, the MOM estimator could no longer control the Type I error rates. In this study, the Winsorized MOM estimator was used in the AG test, as a measure of its central tendency under non-normality. 5,000 data sets were simulated and analysed for each of the test in the research design with the use of Statistical Analysis Software (SAS) package. The results of the analysis shows that the Winsorized modified one step M-estimator in the Alexander-Govern (AGWMOM) test, gave the best control of Type I error rates under non-normality compared to the AG test, the AGMOM test, and the ANOVA, with the highest number of conditions for both lenient and stringent criteria of robustness.","PeriodicalId":31095,"journal":{"name":"ComTech","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67821412","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

Risk Management in Information Technology Project: An Empirical Study 信息技术项目风险管理:实证研究

ComTech Pub Date : 2016-09-30 DOI: 10.21512/COMTECH.V7I3.2498

Kornelius Irfandhi S.Kom

引用次数: 5

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