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I Gusti Ayu Made Srinadi
Prodi Matematika FMIPA Universitas Udayana
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PERAMALAN NILAI TUKAR PETANI SUBSEKTOR TANAMAN PANGAN PROVINSI BALI MENGGUNAKAN METODE FUZZY TIME SERIES CHEN ULYATIL AENI; I WAYAN SUMARJAYA; I GUSTI AYU MADE SRINADI
E-Jurnal Matematika Vol 12 No 2 (2023)
Publisher : Mathematics Department, Faculty of Mathematics and Natural Sciences, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/MTK.2023.v12.i02.p407

Abstract

Forecasting is a way to predict future events. One of the methods for forecasting is to use fuzzy time series Chen method. Fuzzy time series Chen is a development of fuzzy time series Song and Chissom method with more simplified arithmetic operations. In this study, the forecasting for the NTP especially in food crops sub-sector of Bali was done by using first-order and high-order fuzzy time series methods to predict next period. The results show that the most appropriate forecasting method is the second-order fuzzy time series Chen with the result for June 2022 are 90.95, July 2022 are 91.95, and August 2022 are 92.45 with MSE value of 0.4563 and MAPE value of 0.2824%.
ANALYSIS OF CONSUMER PREFERENCES IN CONSUMING PROCESSED COFFEE PRODUCTS AT CAFE NECTAR BALI Isabel Divya Georgiana Walewangko; I Komang Gde Sukarsa; I Gusti Ngurah Lanang Wijayakusuma; I Putu Eka Nila Kencana; I Gusti Ayu Made Srinadi; Ratna Sari Widiastuti
Jurnal Cahaya Mandalika ISSN 2721-4796 (online) Vol. 4 No. 3 (2023): Jurnal Cahaya Mandalika
Publisher : Institut Penelitian Dan Pengambangan Mandalika Indonesia (IP2MI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/jcm.v4i3.2104

Abstract

Coffee beverages have become a highly sought-after product, particularly in tourist areas that are favoured by both local and foreign tourists. For this reason, there are many business owners who want to expand their business with coffee as the main menu. Cafe Nectar Bali, not far from the tourist attraction Garuda Wisnu Kencana (GWK), is one of the places frequented by both locals and foreign tourists. The purpose of this study is to identify the characteristics consumers often consider when consuming processed coffee products at Cafe Nectar Bali and to understand the preferences of local residents and foreign tourists regarding processed coffee products offered. The research method used is the analysis of local and foreign tourist preferences using conjoint analysis techniques. The findings show that consumers are prioritizing the type of coffee and how it is served. Both locals and foreign tourists value the diversity feature more than the presentation method feature. Local consumers choose the stimulus of latte variant and hot serving methods. On the other hand, foreign tourists chose the stimulus of latte variant and the cold serving method. Coffee; Conjoint Analysis; Consumer Preferences
Eksplorasi Etnomatematika pada Monumen Perjuangan Rakyat Bali Putu Wulan Cahayaningrat; Ni Wayan Dewi Anastasya Pratiwi; Ni Putu Monikha Alvionitha; I Gusti Ayu Made Srinadi
Journal on Education Vol 6 No 2 (2024): Journal on Education: Volume 6 Nomor 2 Tahun 2024
Publisher : Departement of Mathematics Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/joe.v6i2.5122

Abstract

Indonesia's cultural wealth as an ancestral heritage requires protection so that the values of wisdom are preserved. In the era of globalization, education has an important role in shaping character and passing on cultural heritage. The ethnomathematics approach, which combines mathematics and culture, is a bridge to integrate culture in education. An ethnomathematics exploration of the Monument to the People's Struggle in Bali reveals mathematical concepts in the structure of the historic building. This research used an ethnographic and exploratory approach with a focus on the Bali People's Struggle Monument. Data consisted of observation, literature study, and documentation. Analysis was conducted to identify mathematical concepts, especially in geometry, using a taxonomy approach. The Monument to the Struggle of the Balinese People reflects the story of the play of Mandara Giri with the symbols of Lingga and Yoni. The building structure has an 8-square plan and the Asta Dala lotus flower. The symbol of struggle is reflected in the number of steps, the Supreme pillar, and the height of the monument, depicting the date of the Proclamation of Indonesian Independence. In the ethnomathematics exploration, geometry concepts such as square, octagon, right triangle, trapezoid, rectangle, circle, isosceles triangle, parallelogram, and tube were identified in the building structure of the Bali People's Struggle Monument.
Analisis Unsur Etnomatematika dan Nilai Optimasi pada Produksi Alat Musik Angklung Bali Eriska May Wulandari; Wayan Evi Handayani; Ni Made Audi Kirei Saraswati; Ni Kadek Dhirayani; I Gusti Ayu Made Srinadi
Journal on Education Vol 6 No 3 (2024): Volume 6 Nomor 3 Tahun 2024
Publisher : Departement of Mathematics Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/joe.v6i3.5476

Abstract

Geometry Calculations and Optimization Values are one form of application of Ethnomathematics that can be applied to the production of Balinese Gamelan Angklung Musical Instruments. The aim of this study is to determine the number of ethnomathematics elements that can be found in a culture in each region through a research project. The methodology for this study was carried out using direct observation and interviews by visiting the production site of Gamelan Angklung Musical Instruments on Gong Tari, precisely in Tihingan Village, Banjarangkan District, Klungkung Regency, Bali Province. The results of this study found that there were many geometric elements that could be found in Balinese Gamelan Angklung, apart from that, optimization values were also calculated in the production process. The conclusion of this study explains that many elements of ethnomathematics can be found in various cultures and regions, one of which is in the process of making Gamelan Angklung Musical Instruments on Gong Tari.
PREDIKSI MARKET VALUE PEMAIN SEPAK BOLA DI LIMA LIGA TOP EROPA MENGGUNAKAN K-NEAREST NEIGHBOR HIRZI FIRDAUSI; I WAYAN SUMARJAYA; I GUSTI AYU MADE SRINADI
E-Jurnal Matematika Vol 13 No 2 (2024)
Publisher : Mathematics Department, Faculty of Mathematics and Natural Sciences, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/MTK.2024.v13.i02.p446

Abstract

Every football club in competition at any country has ambition to be a champion. One of the important things to be a champion is the quality of player in the team. Therefore, when transfer time is opened, almost every club buys the required players. Busy transfer activity frequently occurs in five Europe top leagues. Nevertheless, a club frequently buys a player which has price beyond market value transfer (market value). The reason is that many clubs still don not know how to determine market value. The aim of this research is to predict the market value of football players in five Europe top leagues using K-nearest neighbor (KNN). Data which will be used are 26 football players who play in five Europe top leagues with club get into first tier league (promotion) in season of 2022/2023. The result is that the model which is used for prediction is a KNN model which has proportion of training data and test data at the ratio of 90:10 and parameter K = 3 since it has the lowest MAPE which is 10,45 %. From model selection we obtain MAPE value at 28,614 % for compared prediction of market value result with actual of market value.
PEMODELAN REGRESI NONPARAMETRIK SPLINE TRUNCATED KASUS KEJADIAN DIARE DI PROVINSI BALI NADIYA YUVITA RIZKI; I GUSTI AYU MADE SRINADI; I KOMANG GDE SUKARSA
E-Jurnal Matematika Vol 13 No 1 (2024)
Publisher : Mathematics Department, Faculty of Mathematics and Natural Sciences, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/MTK.2024.v13.i01.p438

Abstract

Nonparametric regression is a flexible approach used to determine the relationship between the predictor variable and the response variable is unknown. One method that can be used to estimate nonparametric regression models is the truncated spline. The truncated spline is an effective method to estimate nonparametric regression models due to its ability to adapt to the data's characteristics through knots. Truncated spline estimates its parameters with the maximum likelihood estimator (MLE) method and finds the optimal knot points with the minimum generalized cross validation (GCV) value. This study used the truncated spline to model diarrhea cases in Bali Province, examining five variables that could affect incidence. The optimal knot points were 2-1-3-3-2 with a minimum GCV value of 67572,38. The study found that the number of clean drinking water facilities, food management places that meet health requirements, public places that meet health requirements, population density, and access to proper sanitation facilities had a significant effect on diarrhea incidence. The coefficient of determination for this model is 98,87%.
ANALISIS REGRESI LOGISTIK ORDINAL SPASIAL STATUS KETAHANAN PANGAN PADA KABUPATEN/KOTA DI INDONESIA TAHUN 2020 NI NYOMAN UTAMI DEWI; MADE SUSILAWATI; I GUSTI AYU MADE SRINADI
E-Jurnal Matematika Vol 12 No 4 (2023)
Publisher : Mathematics Department, Faculty of Mathematics and Natural Sciences, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/MTK.2023.v12.i04.p430

Abstract

Food is a basic need which is a right for humans to survive and has an important role so that an arrangement is needed that describes the level of food security in each region. Food security status shows the food stability of a region in terms of availability, access, and consumption of food for the local populace. The diversity of regencies/cities gives a variance effect in the results of food security so that the spatial influence is included in modeling the status of food security owing to the likelihood of interactions in our research between regions with one another, meaning that the condition of food security in regencies/cities is influenced by the condition of neighboring regencies/cities. Based on this, a model is that may be utilized to assess the state of food security is required in districts/cities in Indonesia in 2020. Logistic regression analysis is one technique that may be utilized to create the model regression analysis. Logistic regression analysis is a regression method that tests whether there is a probability the independent variable has the ability to predict the dependent variable.
ANALISIS ANTREAN SPBU UDAYANA DENGAN MODEL ANTREAN NON-POISSON LUIS RICARDO PANDIANGAN; NI PUTU DIAN ASTUTIK; EVARISTUS VERIYOGI YALSCHEN LEMBUNAI; I GUSTI AYU MADE SRINADI; MADE AYU DWI OCTAVANNY
E-Jurnal Matematika Vol 13 No 2 (2024)
Publisher : Mathematics Department, Faculty of Mathematics and Natural Sciences, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/MTK.2024.v13.i02.p453

Abstract

Long queues at gas stations are a common sight, consuming valuable time for vehicle refueling. This inconvenience poses a challenge for the community, necessitating efficient time management. To address this issue, optimization through queue analysis is proposed. This study aims to analyze the queuing process for pertalite motorcycle fueling at one of the refueling stations, Udayana Gas Station, using the non-Poisson model (GPD/GEV/1):(FIFO/?/?). Additionally, a comparison is made with a modified scenario by introducing an extra server, resulting in the model (GPD/GEV/2):(FIFO/?/?). Based on 60 sampled data collected on Friday, 17 November, 2023, the analysis reveals a queue time of 5.8 minutes, with an expected 9 motorcycles in the queue. The results of the new model (GPD/GEV/2):(FIFO/?/?) indicate a notable reduction, with no motorcycles waiting in line for fueling. Consequently, it is recommended that Udayana Gas Station add an additional pertalite refueling station for motorcycles, promoting enhanced efficiency and convenience.
PERAMALAN INDEKS HARGA PERDAGANGAN BESAR KELOMPOK KOMODITAS PERTANIAN MENGGUNAKAN METODE SINGULAR SPECTRUM ANALYSIS I MADE PRABA ESHA SUKSEMAWAN; I WAYAN SUMARJAYA; I GUSTI AYU MADE SRINADI
E-Jurnal Matematika Vol 13 No 2 (2024)
Publisher : Mathematics Department, Faculty of Mathematics and Natural Sciences, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/MTK.2024.v13.i02.p450

Abstract

The wholesale price index (WPI) is an index used to measure the average price change over time of a package of goods in wholesale trade. This price index is an indicator to view general economic developments and material for market and monetary analysis. Related to WPI as material for market and monetary analysis, forecasting of WPI is very much needed, especially in agricultural commodities, which are a vital sector. The WPI in the agricultural commodity group in this study was forecasted using the singular spectrum analysis (SSA) method. The data used in forecasting is WPI data from January 2005 to December 2022. Forecasting accuracy level is determined by using vector singular spectrum analysis (VSSA) method. Forecasting results show that the best SSA model is obtained with the window length value and MAPE value is 1,9%. This shows that the SSA method can predict the WPI of agricultural commodities very accurately.
Application of the Queuing System at the Renon Gacoan Noodle Restaurant I Gede Purna Adi Putra; Mirza Rizaldi Sudrajat; I Kadek Yudha Pramana Adi; Agung Dwi Cahya Megamahaputra; Ni Made Putri Ja Yanti; I Gusti Ayu Made Srinadi
International Journal of Education and Literature Vol. 3 No. 2 (2024): August : International Journal of Education and Literature
Publisher : Pusat Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/ijel.v3i2.105

Abstract

Renon Gacoan Noodle Restaurant is a fast food spicy noodle restaurant in Bali. This restaurant, which carries a modern restaurant concept at affordable prices, has made Mie Gacoan Renon popular among various groups. Its strategic location in the city center makes this restaurant busy with visitors, which causes quite dense queues at certain hours. Mie Gacoan Renon uses a Single Channel-Single Phase queuing system to serve visitors. The service also uses a First In First Out (FIFO) model where visitors who arrive first will be served first. The average visitor arrival is 1 person/minute and the average service is 1.6 minutes. With the help of SPSS software In processing the data, it was found that the number of customer arrivals and Mie Gacoan Renon restaurants had a Poisson distribution and the distribution of service times was a Loglogistic distribution.
Co-Authors AA Sudharmawan, AA ADE KUSUMA DEWI Agnes Juliet Boking Agnes Juliet Bokings Agung Dwi Cahya Megamahaputra AGUST WIRAS ARDI KUSUMA ANAK AGUNG ISTRI AGUNG CANDRA ISWARI ANNA FITRIANI AYU SANDRA TIARA DEWI Ayuk Dwi Cahyani Chairun Nisa Cokorda Istri Tirta Rusmala Dewi Deddi Prima Putra DERY MAULANA Desak Putu Eka Nilakusmawati DEWA AYU DWI ASTUTI Dewi, Cokorda Istri Tirta Rusmala DOMINGGAS TEO Dyan Ayu Wijayanti EKA ARISTA ANJASARI Eriska May Wulandari EVARISTUS VERIYOGI YALSCHEN LEMBUNAI G. K. GANDHIADI G. K. GANDHIADI GILANG BIMASAKTI ANDHIKA GUSTI AYU PUTU YULIANDARI GUSTI AYU RATIH ASTARI HIRZI FIRDAUSI I GEDE AGUS JIWADIANA I Gede Purna Adi Putra I GUSTI AYU MADE VALENTINA DEWI I Kadek Yudha Pramana Adi I KOMANG GDE SUKARSA I Komang Gede Sukarsa I Made Agus Gelgel Wirasuta I MADE BUDIANTARA PUTRA I MADE PRABA ESHA SUKSEMAWAN I Nyoman Widana I Putu Eka Nila Kencana I Putu Eka Suarsa I PUTU YUDANTA EKA PUTRA I Wayan Sumarjaya I.K.G. Sukarsa IDA AYU MADE SUPARTINI Isabel Divya Georgiana Walewangko K. Jayanegara KADEK NOVIA DWIJAYANTHI KASTIN DWILEN PONG SUMAE Ketut Jayanegara KHOSYI RUKITO Komang Dharmawan LUH KOMANG MARDIANI Luh Putu Ratna Sundari LUH PUTU SAFITRI PRATIWI LUIS RICARDO PANDIANGAN Luky Adrianto M ARRIE KUNILASARI ELYNA Made Asih MADE AYU DWI OCTAVANNY MADE NARYMURTI WIDYASTUTI Made Novita Dewi Made Susilawati MILATUS SHOLIKHA Mirza Rizaldi Sudrajat MULIA YASMAN NADIYA YUVITA RIZKI NATASYA WIDIA PUTRI Ni Kade Hindu Pertiwi NI KADEK ARISKA DEWI Ni Kadek Dhirayani NI KADEK DWI ARISYA AFRILIANTI NI KADEK ENDAH YANITA UTARI NI LUH GEDE SINTA ARYATI NI LUH NIKASARI Ni Luh Putu Suciptawati NI LUH WIWIN YUNIARTI Ni Made Asih Ni Made Audi Kirei Saraswati Ni Made Putri Ja Yanti NI MADE SEKARMINI NI MADE SRI KUSUMAWARDHANI NI NYOMAN UTAMI DEWI NI PUTU DIAN ASTUTIK Ni Putu Linda Laksmiani Ni Putu Manik Maharani NI PUTU MEILING UTAMI NI PUTU MIRAH SRI WAHYUNI Ni Putu Monikha Alvionitha NI PUTU NIA IRFAGUTAMI NI PUTU PREMA DEWANTI NI PUTU RINA ANGGRENI NI WAYAN ARI SUNDARI NI WAYAN ARIS APRILIA A.P NI WAYAN ASRI PRADNYANI Ni Wayan Dewi Anastasya Pratiwi Ni Wayan Merry Nirmala Yani NI WAYAN YULIANI NI WAYAN YUNI CAHYANI NOVIAN ENDI GUNAWAN NUR FAIZA NURMA ALIYUWANINGSIH NYOMAN GDE PRAJNAWIWEKA RATMASA TARAM NYOMAN KRISHNA PRATIWI DANGIN Nyoman Wendri PALUPI PURNAMA SARI PANDE PUTU BUDI KUSUMA Putu Edi Dimas Saputra PUTU SUSAN PRADAWATI Putu Wulan Cahayaningrat Ratna Sari Widiastuti SORAYA SARAH AFIFAH TJOK GDE SAHITYAHUTTI RANANGGA TRI ALIT TRESNA PUTRA Ulfatun Farika Novitasari ULYATIL AENI Wayan Evi Handayani Wijayakusuma, I Gusti Ngurah Lanang WILDAN FATTURAHMAN MUJTABA Yani Arthayanti ZANUAR SEPTYADI