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All Journal IAES International Journal of Artificial Intelligence (IJ-AI) Seminar Nasional Aplikasi Teknologi Informasi (SNATI) Zenit Sinkron : Jurnal dan Penelitian Teknik Informatika International Journal of Artificial Intelligence Research Jurnal Bahasa Rupa AKSIOLOGIYA : Jurnal Pengabdian Kepada Masyarakat JPM (Jurnal Pemberdayaan Masyarakat) The Spirit of Society Journal : International Journal of Society Development and Engagement JMM (Jurnal Masyarakat Mandiri) JTAM (Jurnal Teori dan Aplikasi Matematika) Celebes Abdimas: Jurnal Pengabdian Kepada Masyarakat Jurnal Mantik EDUTEC : Journal of Education And Technology Ideas: Jurnal Pendidikan, Sosial dan Budaya Jurnal ABDINUS : Jurnal Pengabdian Nusantara INFORMASI (Jurnal Informatika dan Sistem Informasi) Aksara: Jurnal Ilmu Pendidikan Nonformal Community Empowerment AKM: Aksi Kepada Masyarakat

Ratnadewi .

Universitas Kristen Maranatha

Author-ID : 2405881

Religion Arts Humanities Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Mathematics Public Health Social Sciences Other

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Simulasi Pencarian Rute Terpendek Bagi Pengguna Transportasi Bus Trans Jakarta Indonesia Pasaribu, Novie Theresia Br.; -, Ratnadewi
Zenit Vol 1, No 1 (2012)
Publisher : Zenit

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Traffic jams occur in the capital city of Jakarta. The price increase of  fuel, daily tasks/activities demand that everyone have fast journey with economical cost, and save energy. The Jakartaâs residents then make use of Trans Jakarta Bus Indonesia (Bus Way) facility as one solution to get  faster transportation, comfortable seats, and economical cost. This research proposes  the design and simulation realization of searching the shortest route for the Trans Jakarta Bus Indonesia by using a combination of Iterative Deepening (ID) and Djikstra Algorithm. It is expected that the busway commuters can choose  the right route to reach their destination with cost-effective travels. ID Algorithm is a searching algorithm  which expands all possible routes from the initial to the final state. Djikstra Algorithm is a searching algorithm of the solution value that considers distance depending on the smallest cost (the shortest path). The shortest route searching simulation using the combination of ID and Djikstra Algorithm has successfully been recognized. By using 12 testing samples of the various traveling cases, the researchens notice the average processing  time of this application, namely 0.733 second. The simulation program gives the information of the shortest route, most efficient cost, and best public facilities for the bus way commuters.  Keywords: Simulation, the shortest route, Iterative Deepening Algorithm, Djikstra Algorithm.

Counseling on health protocols in public transport for kopamas drivers in Bandung City Manurung, Rosida Tiurma; Pattipawaej, Olga; Ratnadewi, Ratnadewi
Community Empowerment Vol 6 No 6 (2021)
Publisher : Universitas Muhammadiyah Magelang

In the era of adapting new habits after the Covid-19 pandemic, especially public transportation, it is necessary to provide health protocol counseling to kopamas drivers. This counseling is important considering the problem of the spread of Covid-19 in Bandung is still high. The purpose of this activity is to provide counseling on the application of health protocols to kopamas drivers, establish concern for others, especially the community in the campus environment; prevent the wider spread of Covid-19; and develop an attitude of concern for environmental health. This activity was carried out at the house of the chairman of RW 01 Sukagalih Village. The kopamas drivers were accompanied directly by a team of extension workers. The pocket books on health protocols, stickers, masks and basic necessities were distributed to kopamas drivers during counseling. This service generates understanding for kopamas drivers and is expected to be able to educate kopamas passengers.

Counseling on making learning videos with mobile phones to Indonesian educators Ratnadewi, Ratnadewi; Sartika, Erwani Merry; Wahono, Sri; Amadeus, Clarence
Community Empowerment Vol 6 No 7 (2021)
Publisher : Universitas Muhammadiyah Magelang

Education sector in Indonesia was shocked by the total change from the previously offline-based education system to online, due to the state of the Covid-19 pandemic. No country wants to experience this pandemic, but the rapid spread has changed all sectors of life, especially the education in Indonesia. Educators are required to continue to carry out online learning activities, but not all educators can create learning video content. Moving on from this problem, an online quick education was made to make learning videos using mobile phones, which was organized by Maranatha Christian University in collaboration with Guru Mengajar untuk Nusantara and STKIP PGRI Trenggalek. The material given was flyer design techniques, photo taking techniques, and making videos with Kinemaster. The postermywall and kinemaster applications used can be downloaded on the playstore on android. The activity was open to teachers and lecturers for free and guided for one month. Participants who registered were 1059 people from various district in Indonesia and were guided by 39 instructors. At the end of the activity, 510 participants (48.16%) passed with the criteria of being able to make learning videos until they were uploaded to YouTube.

EEG signal classification for drowsiness detection using wavelet transform and support vector machine Novie Theresia Br. Pasaribu; Timotius Halim; Ratnadewi Ratnadewi; Agus Prijono
IAES International Journal of Artificial Intelligence (IJ-AI) Vol 10, No 2: June 2021
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijai.v10.i2.pp501-509

There are several categories to detect and measure driver drowsiness such as physiological methods, subjective methods and behavioral methods. The most objective method for drowsiness detection is the physiological method. One of the physiological methods used is an electroencephalogram (EEG). In this research wavelet transform is used as a feature extraction and using support vector machine (SVM) as a classifier. We proposed an experiment of retrieval data which is designed by using modified-EAR and EEG signal. From the SVM training process, with the 5-fold cross validation, Quadratic kernel has the highest accuracy 84.5% then others. In testing Driving-2 process 7 respondents were detected as drowsiness class, and 3 respondents were detected as awake class. In the testing of Driving-3 process, 6 respondents were detected as drowsiness class, and 4 respondents were detected as awake class.

Pelatihan Pencegahan dan Penanggulangan Demam Berdarah Dengue Ratnadewi Ratnadewi; Maria Christine; Rosida Tiurma Manurung; Teresa Liliana Wargasetia; Dani Dani
Celebes Abdimas: Jurnal Pengabdian Kepada Masyarakat Vol 1 No 1 (2019): April
Publisher : Lembaga Layanan Pendidikan Tinggi Wilayah IX Sulawesi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1416.776 KB)

Pelatihan pencegahan dan penanggulangan Demam Berdarah Dengue telah dilakukan oleh tim pengabdi Universitas Kristen Maranatha di Kelurahan Sukagalih Bandung pada tanggal 4 Desember 2018. Tujuan pengabdian kepada masyarakat berupa pelatihan tersebut adalah agar masyarakat dapat mempunyai perilaku yang baik untuk mencegah peningkatan jumlah nyamuk penyebab Demam Berdarah Dengue. Hal ini disebabkan Indonesia termasuk negara beriklim tropis yang hampir pada setiap tahun dan di beberapa kota ditemukan banyak penderita yang terinfeksi penyakit Demam Berdarah Dengue akibat cucukan nyamuk Aedes aegypti betina. Para peneliti merumuskan bahwa iklim dapat mempengaruhi perkembangan nyamuk Aedes aegypti, sementara peneliti lain menyimpulkan bahwa iklim tidak mempengaruhi hal tersebut. Terlepas dari polemik tersebut, pada kenyataannya yang terpenting untuk mengurangi bertambahnya jumlah nyamuk adalah perilaku masyarakat sehingga diperlukan pelatihan kepada masyarakat untuk pencegahan dan penganggulangan penyakit Demam Berdarah Dengue. Metode yang digunakan adalah ceramah, diskusi, dan peran aktif masyarakat. Hasil yang diperoleh sampai makalah ini dibuat adalah meningkatnya pengetahuan masyarakat terhadap pencegahan dan penanggulangan penyakit Demam Berdarah Dengue yang diperoleh dari kuesioner yang disebarkan. Simpulan yang diperoleh adalah pemahaman masyarakat tentang hal-hal mengenai penyakit Demam Berdarah Dengue telah meningkat dengan rata-rata pemahaman sebesar 85,6%.

Informasi Pada Sumber Suara Tiga Dimensi Diperoleh Dengan Metode Optimasi Steepest Descent Ratnadewi Ratnadewi; Vikky Bernadus
Seminar Nasional Aplikasi Teknologi Informasi (SNATI) 2008
Publisher : Jurusan Teknik Informatika, Fakultas Teknologi Industri, Universitas Islam Indonesia

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Masalah dalam akustik dapat berupa masalah langsung maupun invers. Dikatakan masalah langsungapabila tekanan akustik pada sembarang titik di medan akustik dapat ditentukan dengan mengetahui tekananatau potensial kecepatan permukaan sumber dan sebaliknya untuk masalah inversi. Informasi tentang kecepatanpermukaan, tekanan suara dan daya akustik dari sumber akustik sangat berguna untuk mengidentifikasi sumberakustik tersebut.Metode Steepest Descent digunakan untuk mencari informasi tentang kecepatan permukaan, tekanansuara dan daya akustik dari sumber akustik, jika diketahui informasi pada medan akustik.Uji kasus dilakukan pada ruang tiga dimensi dengan mengambil sumber berbentuk bola. Sebagaipembanding hasil formulasi digunakan nilai acuan yang diperoleh dari perhitungan analitis yang diketahui.Hasil solusi inversi yang diperoleh dengan optimasi steppest descent memberikan nilai kesalahan rata-rata yanglebih kecil dibandingkan dengan hasil solusi inversi tanpa optimasi.Kata kunci: masalah inverse akustik, Steepest Descent

Fingerprint Identification Using Modified Gabor Filter Ratnadewi Ratnadewi; Didi Sugianto
Seminar Nasional Aplikasi Teknologi Informasi (SNATI) 2006
Publisher : Jurusan Teknik Informatika, Fakultas Teknologi Industri, Universitas Islam Indonesia

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Fingerprints have been used as biometrics for personal identification or verification since a century ago. Although no exactly the same fingerprint from distinct identities was found, a perfect system for automatic fingerprint identification does not exist. The technique described here obviates the need for extracting minutiae points to match fingerprint images. This paper implements a Modified Gabor Filter (MGF). A circular tessellation of filtered image is then used to construct the ridge feature map. The fingerprint matching is based on the Euclidean distance between two corresponding feature vectors. This method can lessen noise, improving contrast between ridge and valley and also have tolerance to translation and rotation. Our system can increase the quality of image fingerprint. The achievement rate percentage of recognition is 85%.Keywords: Biometrics, Modified Gabor filters, fingerprints, matching.

The Analysis of Students and Teachers Readiness On Distance Learning Mathematics In New Normal Ratnadewi Ratnadewi
EDUTEC : Journal of Education And Technology Vol 4 No 3 (2021): March 2021
Publisher : STAI Miftahul Ula Nganjuk

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29062/edu.v4i3.154

A sudden pandemic has created a learning system in Indonesia, which is usually done face-to-face, in the New Normal era, online learning is required. This sudden incident turned the wheel of life and learning 180 degrees. This paper discusses the level of readiness of students and teachers in mathematics distance learning. The level of readiness includes ownership of electronic devices, availability of internet signals, costs, support from parents or people around, skills in accessing digital learning applications, learning places, teachers who can teach well, materials, teacher guidance, solutions if they encounter problems, abstinence give up, and be able to understand distance learning material. Data obtained from the results of questionnaires and interviews with students and teachers in Indonesia. The results of the analysis of the data obtained are that students and teachers are in the criteria of being quite ready to be very ready to carry out distance learning. From the results of questionnaires and interviews, both students and teachers prefer a mixture of distance and face-to-face learning, because when it is difficult to understand the learning material, the teacher can explain directly, more able to monitor the condition of students. The weakness of distance learning is that it is constrained by internet signals, no emotional bonds, it is difficult to monitor students' abilities and higher credit costs.

PENDAMPINGAN PEMBELAJARAN NODEMCU MENYONGSONG ERA REVOLUSI MASYARAKAT 5.0 PADA SISWA SMA X DI KOTA BANDUNG Ratnadewi Ratnadewi; Yohana Susanthi; Agus Prijono; Tio Dewantho S; Clarence Amadeus
JMM (Jurnal Masyarakat Mandiri) Vol 4, No 1 (2020): Maret
Publisher : Universitas Muhammadiyah Mataram

Abstrak: Menyongsong era revolusi masyarakat 5.0 generasi muda perlu dibekali dengan ilmu pengetahuan yang bermanfaat pada waktu yang akan datang. Hal ini yang menjadi dasar dilakukan pendampingan pembelajaran NodeMCU sebagai salah satu perangkat Internet of Things yang berguna untuk mengendalikan perangkat dari perangkat mobile atau perangkat komputer jarak jauh. Evaluasi hasil pendampingan digunakan dua cara yaitu, metode survey dan participatory action research. Pendampingan diikuti oleh 43 siswa-siswi SMA X di Bandung selama dua hari. Hasil kuesioner pertama dan kedua setelah dibandingkan terdapat peningkatan pemahaman sebelum dan sesudah mentorship sebesar 20%-25% yang diperoleh dari persentasi siswa yang menjawab benar materi kuesioner. Sedangkan hasil kuesioner ketiga diperoleh pencapaian kepuasan siswa rata-rata di atas 3 yang berarti siswa merasa penyampaian materi, fasilitas, dan kualitas kegiatan pendampingan bernilai ”baik”. Abstract: Toward the era of revolution in society 5.0 young generations need to be equipped with useful knowledge in the future. This is the basis for NodeMCU learning mentorship as one of the Internet of Things devices that is useful for controlling devices from mobile devices or remote computer peripheral. The evaluation results of the mentorship are used in two ways that are survey methods and participatory action research. The mentorship was attended by 43 students of SMA X in Bandung for two days. The results of the first and second questionnaires after comparison have increased understanding before and after mentorship by 20% - 25% obtained from the percentage of students who answered the questionnaire material correctly (Figure 6). While the results of the third questionnaire obtained an average achievement of student satisfaction above 3, which means students feel the delivery of material, facilities, and the quality of mentoring activities is worth "Good".

Implementation of Art and Technology in Batik Purwakarta Ratnadewi Ratnadewi; Ariesa Pandanwangi; Agus Prijono
JTAM (Jurnal Teori dan Aplikasi Matematika) Vol 4, No 1 (2020): April
Publisher : Universitas Muhammadiyah Mataram

Indonesia is dominated by cities that have a history of batik, but Purwakarta does not have a history of batik. But thanks to the persistence of policy holders, Purwakarta currently has batik obtained by elevating the local wisdom of the city of Purwakarta. After surveys and interviews, several batik motifs were designed. The batik motif shape, size and position will be studied which will formulate mathematical equations based on basic geometric shapes such as circles, arches, lines, rectangles, which are implemented into the form of computer graphics (turtles) graph and explained in the form of an algorithm (pseudocode) computer programming to make autogenerative motifs on Purwakarta batik that did not exist before. Batik design is inspired by food and tourist locations which form the basis of the formation of typical Purwakarta batik motifs. Jatiluhur Dam, Datura Metel L. Flower, Sate Maranggi, Mangosteen Fruit is a local wisdom owned by the city of Purwakarta. The results of the morning glory batik design and Jatiluhur dew through mathematical and turtle charts are then formulated so that the batik motif design can be saved by documenting the mathematical equation or the pseudocode of the batik motif. With the results of digital motifs, the process of repeating patterns, duplicating and storing data becomes easier.

Co-Authors AAN DARMAWAN Aan Darmawan H Aan Darmawan Hankawidjaja Agus Prijono Agus Prijono Aldi Setiawan Amadeus, Clarence Ariesa Pandanwangi Arifin, Ardian Aulia Wara Arimbi Putri Christian Felix Clarence Amadeus Dani Dani Decky Gunawan Dennis Harnandi Dewantara, Rizki Diana Chandrasasmita Didi Sugianto Eric Chandra Erwani Merry Sartika Heri Andrianto IDA IDA Iman Budiman Ira Adelina Judea Janoto Jarden Julaiha Probo Anggraini Kartika Suhada Maria Christine Michael Claudius Poltak Pintu Batu Muliady Muliady Muliady Niendy Alexandra Yosephine Novie Theresia Br. Pasaribu Novie Theresia Br. Pasaribu Olga Catherina Pattipawaej Priska Analya Riko Arlando Riko Arlando Saragih Rio Ananda Rosida Tiurma Manurung Teresa Liliana Wargasetia Timotius Halim Tio Dewantho S Tio Dewantho Sunoto Tukiyo Tukiyo Vikky Bernadus Vincent Vincent Wahono, Sri Yohana Susanthi

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