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All Journal Jurnal Ilmu Komputer dan Informasi Jurnal Ilmu Komputer Buletin Udayana Mengabdi Jurnal SPEKTRUM Jupiter TELKOMNIKA (Telecommunication Computing Electronics and Control) Jurnal Ilmiah Teknik Elektro Komputer dan Informatika (JITEKI) Jurnal Teknik Elektro PROSIDING CSGTEIS 2013 Proceedings Konferensi Nasional Sistem dan Informatika (KNS&I) JOIV : International Journal on Informatics Visualization JUTIK : Jurnal Teknologi Informasi dan Komputer Matrix : Jurnal Manajemen Teknologi dan Informatika Cetta: Jurnal Ilmu Pendidikan Journal of Computer Science and Informatics Engineering (J-Cosine) Journal of Electrical, Electronics and Informatics International Journal of Engineering and Emerging Technology Indonesian Journal of Electrical Engineering and Computer Science Journal of Energy and Electrical Engineering (JEEE) Jurnal Ilmiah Vastuwidya SPEKTA (Jurnal Pengabdian Kepada Masyarakat : Teknologi dan Aplikasi) MATRIX : JURNAL MANAJEMEN TEKNOLOGI DAN INFORMATIKA Ulil Albab

Ni Made Ary Esta Dewi Wirastuti

Jurusan Teknik Elektro, Fakultas Teknik, Universitas Udayana

Author-ID : 3462448

Religion Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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Carrier Frequency Offset Effects on OFDM System over Rayleigh Fading Channel N. M. A. E. Dewi Wirastuti; I.G.A.K. Diafari Djuni Hartawan; I Made Arsa Suyadnya; Duman Care Khrisne
Journal of Electrical, Electronics and Informatics Vol 3 No 2 (2019): JEEI (August 2019)
Publisher : Institute for Research and Community Services Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JEEI.2019.v03.i02.p03

Orthogonal Frequency Division Multiplexing (OFDM) system showed the use of Discrete Fourier Transform (DFT) and Inverse Discrete Fourier Transform (IDFT) to perform the baseband modulation and demodulation. So that, it can increase and improve the efficiency of the modulation and demodulation. Currently, the OFDM is being utilized in the field of broadband wireless communication, which transmit signals orthogonally, that increases speed of information transmission. It also has high proficiency with high bandwidth and provide large data rates and robust against the multipath delay spread. On the other hand, there are some issues faced OFDM system which are high Peak Average Power Ratio (PAPR), and sensitive to Phase Noise (PN) and Carrier Frequency Offset (CFO). This paper presents Orthogonal Frequency Division Multiplexing (OFDM) performance evaluation in the presence of CFO with two different environment scenarios were used: an AWGN channel and a Rayleigh fading channel. The simulation was performed to evaluate the effects of CFO based on Bit Error Rate (BER) vs. Energy Bit per Noise Ratio (Eb/No). The results showed that for BER degradation caused by CFO effects have presented in our simulation for both AWGN and Rayleigh fading channel.

Market Basket Analysis using FP-Growth Association Rule on Textile Industry Kadek Darmaastawan; Komang Oka Saputra; Ni Made Ary Esta Dewi Wirastuti
International Journal of Engineering and Emerging Technology Vol 5 No 2 (2020): July - December
Publisher : Doctorate Program of Engineering Science, Faculty of Engineering, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/IJEET.2020.v05.i02.p05

Online shop is one of the technological developments that makes it easy for sellers and buyers to make transactions. A batch of data is produced from the process at an online shop and will be wasted if not utilized properly. An example is a batch of transaction data that may store hidden information that might benefit the online shop, such as information on customer transaction patterns or information on the relationship between two or more items that are most often purchased by customers. Based on that problem, this research conducts market basket analysis using one of the data mining methods, namely Association Rule with FP-Growth Algorithm, to find hidden information in a transaction data produced by an online shop. The data used in this research is an online shop transaction data that contains more than one item from November 2019 to December 2019 owned by one of the textile industries located in Ubud, Bali. The calculation of the FP-Growth Association Rule also tested using the Weka application. The results of market basket analysis are several associative rules related to the combination of best-selling items, such as “customers who buy Tigers Base Grey will have a 100% chance of buying Tribal Green too”. The result can be utilized by the textile industry owner to manage the layout of the online shop, add item recommendation features to the online shop based on items purchased by the customer, and also keep stock of the best-selling items to prevent running out of stock.

GAMIFIKASI DALAM PEMBELAJARAN ONLINE DAPAT MENINGKATKAN MOTIVASI INTRINSIK I Putu Suryadharma; Linawati .; Ni Made Ary Esta Dewi Wirastuti
Jurnal Teknologi Informasi dan Komputer Vol 7, No 4 (2021): Jurnal Teknologi Informasi dan Komputer
Publisher : LPPM Universitas Dhyana Pura

Show Abstract | Download Original | Original Source | Check in Google Scholar

ABSTRACTGamification plays a large role in increasing learning motivation and other activities. This study aims to determine the role of gamification in increasing intrinsic motivation. A total of 60 research subjects were divided into two parts, namely 30 subjects intervened with gamification and 30 other subjects without gamification in online learning. This treatment was given in 12 learning meetings. In addition, as many as 125 respondents, some of whom were treated subjects, were involved in filling out the questionnaire about the relationship between gamification and intrinsic motivation. Of the 125 respondents, it was found that 60% believed that gamification could increase intrinsic motivation, 37% expressed doubt and 3% said no. Based on the test results of respondents who were tested with one way ANOVA, it was found that there was no significant difference (p> 0.05) between the groups that were given gamification and without gamification. Respondents also 47.2% stated that they were not sure that gamification could increase test scores, although 46.4% said they were sure. Based on these results, it can be concluded that the gamification intervention can increase the intrinsic motivation of the learning participants, but it does not automatically increase the test scores.Key Words : Gamification, intrinsic motivation, test scoresABSTRAKGamifikasi banyak berperan dalam meningkatkan motivasi belajar dan aktivitas lainnya. Penelitian ini bertujuan untuk mengetahui peran gamifikasi dalam meningkatkan motivasi intrinsic. Sebanyak 60 subjek penelitian yang dibagi atas dua bagian yaitu 30 subjek diintervensi dengan gamifikasi dan 30 lainnya tanpa gamifikasi dalam pembelajaran online. Perlakuan tersebut diberikan dalam 12 kali pertemuan pembelajaran. Selain itu sebanyak 125 responden, dimana sebagian merupakan subjek yang diberi perlakuan, dilibatkan dalam pengisian kuisener tentang hubungn gamifikasi dengan motivasi intrinsik. Dari 125 responden diperoleh 60% yakin bahwa gamifikasi dapat meningkatkan motivasi intrinsik, 37% menyatakan ragu dan 3% menyatakan tidak. Berdasarkan hasil ujian responden yang diuji dengan one way anova , diperoleh hasil tidak ada perbedaan yang signifikan (p>0,05) antara kelompok yang diberikan gamifikasi dan tanpa gamifikasi. Responden juga 47,2% menyatakan tidak yakin gamifikasi dapat meningkatkan nilai ujian, walaupun 46,4% menyatakan yakin. Berdasarkan hasil tersebut dapat disimpulkan bahwa intervensi gamifikasi dapat meningkatkan motivasi intrinsik peserta pembelajaran, tetapi tidak otomatis dapat meningkatkan nilai hasil ujian.Kata kunci : Gamifikasi, motivasi intrinsik, nilai ujian

Desain Program Simulasi Unjuk Kerja Kode Pn Pada Kanal Multipath Fading Putra Yudhanata Pratama; Nyoman Pramaita; Ni Made Ary Esta Dewi Wirastuti; I Gusti Agung Komang Diafari Djuni Harta
Matrix : Jurnal Manajemen Teknologi dan Informatika Vol 10 No 1 (2020): MATRIX - Jurnal Manajemen Teknologi dan Informatika
Publisher : Unit Publikasi Ilmiah, P3M Politeknik Negeri Bali

Halangan pada Line of Sight (LOS) dapat menyebabkan difraksi (pembelokan), refleksi (pemantulan), dan scattering (penghamburan) pada sinyal informasi dimana akan mengurangi kualitas sinyal informasi yang diterima pada sisi penerima. Hal tersebut mengakibatkan adanya sifat konstruktif maupun destruktif pada sinyal di sisi penerima. Contoh sifat destruktif yang sering terjadi yakni fading dan delay. Sistem penerima correlation receiver diimplementasikan guna mengatasi masalah yang timbul akibat efek dari multipath fading. Untuk memperoleh sinyal dengan nilai error minimum, maka diperlukan analisis terkait proses transmisi pada masing-masing komponen multipath. Hasil analisis diperoleh bahwa unjuk kerja dari Kode PN (Pseudo Noise) pada kanal frequency selective fading yang lebih baik adalah variasi komponen multipath = 3 dibandingkan dengan variasi komponen multipath = 6 dan yang paling buruk adalah variasi komponen multipath = 7. Hal ini dibuktikan dengan melihat nilai Bit Error Rate (BER) saat Energy Per Bit To Noise Power Spectral Density Ratio (Eb/No) = 10 dengan komponen multipath = 3 memiliki nilai BER 0,00368, sedangkan komponen multipath = 6 dan komponen multipath = 7 memiliki nilai BER berturut – turut adalah 0,00386 dan 0,00507. Berdasarkan hasil analisis tersebut dapat diambil simpulan bahwa jumlah komponen multipath yang ada berpengaruh terhadap kualitas sinyal yang diterima.

Comparison of Backpropagation Neural Network and Convolutional Neural Network on Handwriting Pattern Recognition A. A. SG. Mas Karunia Maharani; Komang Oka Saputra; Ni Made Ary Esta Dewi Wirastuti
Journal of Computer Science and Informatics Engineering (J-Cosine) Vol 6 No 1 (2022): June 2022
Publisher : Informatics Engineering Dept., Faculty of Engineering, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jcosine.v6i1.431

Historical manuscripts are one of documents that important to be preserved because they contain a lot of information, one example of them is script as the historical documents . Historical document mostly still use handwriting in so many reserch. Currently, there are many research regarding the preservation of characters. One way of preservation that can be used is the digitization process. Digitizing’s process tanable by recognizing existing information using technology. The technology that can be used is machine learning. Handwriting is a complex case because of the many variations of these characters and the output of the author where variations of the author will produce different writings. The relevant fields for text and documents are Optical Chacarter Recognition (OCR) and handwriting recognition. There are several methods that can be used in the machine learning process, including Artificial Neural Network (ANN) and Convolutional Neural Network (CNN). Both of these methods are methods that can accept complex image input to be processed and recognized, therefore this method is highly recommended for processing handwriting.

Handover Scenarios for Mobile WiMAX and Wireless LAN Heterogeneous Network NMAED Wirastuti; CCW Emehel
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 8: August 2014
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v12.i8.pp6313-6323

This paper presents proposed handover scenarios for a heterogeneous network comprising mobile worldwide interoperability for Microwave Access and Wireless Local Area Network segments. Homogenous handover scenarios for a mobile WiMAX network are also considered to allow a comparative analysis. A mobile node supporting voice traffic is analysed, when operating in a half-cell overlap coverage scenario, for both pedestrian and vehicular speeds. All proposed handover scenarios are assessed and validated through system-level Media Independent Handover network simulations. Results for both homogenous and heterogeneous handover show that the handover delay and jitter are within the acceptable values published by the WiMAX Forum. For heterogeneous handover, the packet loss is negligible for all cases; however, there were significant occurrences of packet loss in throughput for homogenous handover at vehicular speeds. This is due to the fact that the implementation of an adaptive channel scanning algorithm to allocate scanning intervals can limit communication disruptions.

Review methods for clock skew measurement Azra Ariel Azmir; Ni Made Ary Esta Dewi Wirastuti; Komang Oka Saputra
Matrix : Jurnal Manajemen Teknologi dan Informatika Vol. 12 No. 3 (2022): Jurnal Manajemen Teknologi dan Informatika
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/matrix.v12i3.117-122

Clock skew is the deviation of the clock from the true time, which makes it an important role in time information. Clock skew is unavoidable and causes each clock to run at a different speed, so there is a very slight difference between them, but it can still be observed properly. The known properties of clock skew make it potential research for many experts, such as Paxson, Aoki, and Huang. To produce a more accurate clock skew measurement, this study uses the ant colony optimization method by adopting the behavior of an ant colony in searching for food by choosing the path with the shortest route, which will become the cluster offset as a material for measuring clock skew. Ant colony optimization method has the most potential to be adapted in clock skew measurement because the cluster offset is not affected by the upper and the bottom outliers to produce an accurate clock skew measurement.

RANCANG BANGUN SISTEM PENYIRAMAN TAMAN HOTEL OTOMATIS BERBASIS INTERNET OF THINGS (IOT) MENGGUNAKAN ESP8266 I Made Ryan Handika; I Gst A. Komang Diafari Djuni Hartawan; i Made Ary Esta Dewi Wirastuti
Jurnal SPEKTRUM Vol 9 No 3 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

COVID-19 is a virus that attacks the respiratory system, has a negative impact on health. The impact of the pandemic is the reduced number of tourists visiting the island of Bali, making sources of income very limited. This directly has a detrimental impact on hotel managers in Bali. With the policy of reducing the number of employees, it is clearly detrimental to all parties and we can see that several hotel facilities have been damaged, one of which is in the garden. In this final project, a garden watering system based on the Internet of Things was designed using ESP8266. This system works according to a programmed watering schedule, rain sensor readings, and soil moisture sensors. The tool will water the garden when the time conditions are met, the rain sensor detects the absence of rain around the park and also when the relay is active, it flows voltage to the solenoid valve to open the water flow to the Sprinkler. Then the watering data will be sent to the Thingspeak cloud which will also be accessible by applications on smartphones. Monitoring information will be displayed on the LCD and also the application on the smartphone. An IoT-based automatic hotel garden watering system prototype using ESP8266 is able to run according to design.

UNJUK KERJA SISTEM OFDM DENGAN MENGGUNAKAN ALGORITMA VFFT PADA KANAL AWGN N.K.W. Trisnawati; N.M.A.E.D. Wirastuti; I.G.A.K.D.D. Hartawan
Jurnal SPEKTRUM Vol 9 No 3 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

The computational load and implementation costs of a system are affected by its complexity. The Fast Fourier Transform(FFT).algorithm use in an OFDM system necessitates intensive calculations, which affects the computational load and system complexity. There is a Very Fast Fourier Transform(VFFT) algorithm which has lower complexity than the FFT, and can replace FFT with Floating-Point accuracy. The aim of this study is to determine the performance of the OFDM system by using the FFT and VFFT algorithms over the AWGN channel, based on parameter value of BER vs. Eb/No. According to the simulation results, show that the OFDM (FFT) system has a better BER value, where when Eb/No reaches 6 dB the BER value is less than 10-2, while the OFDM(VFFT) system with a BER value is 10-2, but still has almost the same trend. This is because there is non uniform row gain in the OFDM(VFFT) system. However, with this weakness, OFDM(VFFT) can minimize the complexity of the OFDM system.

RANCANG BANGUN PROTOTIPE MONITORING PENGAIRAN SAWAH BERBASIS LORA RA-02 SX1278 Z Zamani Noor; I G A Anom Semara Putra; KO Saputra; NMAE Dewi Wirastuti
Jurnal SPEKTRUM Vol 9 No 3 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Rice field irrigation is still done manually by farmers in opening and closing waterways, so it takes farmers time to manage waterways. In this study, a system was created with two types of devices, namely the sender and the receiver. The sending device consists of ArduinoUNO, Soil Moisture Sensor, Water Level Float Switch, and LoRa Ra-02 SX1278. Then, the receiver consists of NodeMCU ESP8266, LoRa Ra-02 SX1278, Relay, Water Pump. After testing, the system can send notifications to the user when the rice fields are dry or the rice fields are full, the pump can automatically turn on and turn off and the user also can turn the pump on or off via Telegram Bot. User can also command the device to operate automatically via Telegram Bot.

Co-Authors A. A. SG. Mas Karunia Maharani A. T. A Prawira Kusuma adi surya antara Aditya Dwipayana Agus Sukerta Anak Agung Kurnia Aditama Anisa Widayanti Arya Mertasana , Putu Arzalia Khairunnisa Yasmine Asa Arya Sudarman Asana, I Made Dwi Putra Ayuni Harianti Azmir, Azra Ariel Azra Ariel Azmir Azra Ariel Azmir CCW Emehel D. C. Khrisne D. C. Khrisne D.C. Khrisne Dewa Made Wiharta Dhyaksa, Ida Bagus Dharma Dipta, I Made Yogaswara Duman Care Khrisne Enrico Andriyanto F. L. H. Utomo Fajar Tri Prabowo Gde Made Budi Antara Gede Humaswara Prathama Gede Ogiana Gede Sastra Utara Gede Sukadarmika Gerson Feoh Hartawan, I Gusti Agung Komang Dlafari Djuni Hilmy Jawas I Dewa Made Bayu Atmaja Darmawan I Dw Gd Paramartha Warsika I G A Anom Semara Putra I G. A. K. Diafari Djuni Hartawan I Gede Agus Aditya Putra I Gede Agus Aditya Putra Aditya I Gede Eka Sanjaya I Gusti Agung Anom Semara Putra I Gusti Agung Gede Arya Kadyanan I Gusti Agung Komang Diafari Djuni Hartawan I Gusti Ngurah Priambadi I ketut Gede Darma Putra I Ketut Widi Arjana Yasa I Komang Adi Bayu Adnyana I Komang Surya Adinandika I M. A. Suyadnya I M. A. Suyadnya I Made Arsa Suyadnya I Made Oka Widyantara I Made Rai Putera Yasa I Made Ryan Handika I Made Yogaswara Dipta I N Satya Kumara I Nyoman Gunantara I Nyoman Suprapta Winaya I Putu Eka Giri Setya Kresnadi Putra I Putu Suryadharma I Wayan Diki Andriasmika I Wayan Kayun Wardana I.M.A. Suyadnya IBGD. Dhyaksa ICA Lukpratama Ida Ayu Laksmi Dewi Ida Bagus Darma Putra Ida Bagus Kade Dwi Suta Negara Ida Bagus Putu Adnyana IGB Alit Putra Wijaya IGst Ngr PT. Adi S.P. IPH Darmawan Is-Haka Mkwawa K.O Saputra Kadek Agus Mahabojana Dwi Prayoga Kadek Darmaastawan Khalid G. Samarah KO Saputra Komang Isabella Anasthasia Komang Oka Saputra Komang Tri Wahyuni . Komang Yuda Krisnawan Leovin Leovin Linawati Linawati . Linawati Linawati Lino Verlin Lino Verlin Luh Ika Dhivtyasari Suryani M Zatiar Erwan Kalam M. Ardi Fermanta Merliana, Ni Putu Eka MHD. Reza M.I. Pulungan Mkwawa, Is-haka Muhammad Iman Nur Hakim N.G. Widana N.K.W. Trisnawati Ngurah Agus Sanjaya ER Ngurah Indra ER Ni Made Anita Belinda Ni Made Erma Pratiwi Astiti Ni Putu Eka Apsari Yuniari Ni Putu Lintang Anggitiadewi Nyoman Arun Wiratama Nyoman Pramaita Nyoman Pramaita Nyoman Putra Sastra Nyoman Sumerta Yasa Pande Gede Wipradnyana Pebri Yeni Samosir Putra Adi Wibowo Putra Yudhanata Pratama Putu Arya Mertasana R. A. Prayitno R.S. Hartati R.S.E.C. Nesa Rezamal Ilham Samarah, Khalid G. Saputra, Komang Oka Setyohadi, Djoko Budiyanto T. Angrriawan T.B. Purwanto Vencysisca Jeane Risamena Verlin, Lino W. Setiawan Wayan Gede Ariastina Widyadi Setiawan Widyanto, I Putu Willy Sucipto Yansen Andriyanto Yoga Divayana Z Zamani Noor Zaky Zamani Noor “Prama Ade Prayitno

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