Ratih Kartika Dewi

ORCID: 0000-0003-1566-6377
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Research Areas
  • Edcuational Technology Systems
  • Information Retrieval and Data Mining
  • Multimedia Learning Systems
  • Data Mining and Machine Learning Applications
  • Blockchain Technology in Education and Learning
  • Technology Adoption and User Behaviour
  • Computer Science and Engineering
  • Sugarcane Cultivation and Processing
  • Smart Agriculture and AI
  • Decision Support System Applications
  • Technology and Data Analysis
  • Educational Methods and Technology
  • Recommender Systems and Techniques
  • Plant Pathogenic Bacteria Studies
  • Image Processing and 3D Reconstruction
  • Artificial Intelligence in Healthcare
  • COVID-19 Prevention and Impact
  • Soil and Land Suitability Analysis
  • SMEs Development and Digital Marketing
  • Community-based Tourism Development and Sustainability
  • Corporate Governance and Financial Management
  • Cultural and Religious Practices in Indonesia
  • Mobile and Web Applications
  • Education and Character Development
  • Leaf Properties and Growth Measurement

University of Brawijaya
2014-2023

Bandung Institute of Technology
2023

Index Medical College, Hospital & Research Centre
2021

Sepuluh Nopember Institute of Technology
2014

About 15% of sugarcane leaf is defective because diseases, it reduces the quantity and quality production significantly. Early detection estimation plant disease a way to control these diseases minimize severe infection. This paper proposes model identify severity certain spot which appear on leaves based segmented spot. The obtained by thresholding a* component L*a*b* color space. Diseases spots are extracted with maximum standard deviation that use for type using classification techniques....

10.1109/icts.2014.7010564 article EN 2014-09-01

Mobile based culinary recommendation system has become critical topic in mobile application. Some methods presented the literature propose use of AHP (Analytic Hierarchy Process), TOPSIS (Technique for Order Preference by Similarity to Ideal Solution) and fuzzy system. However, there are no comparative studies these three when applied Thus, this research presents a analysis context environment. The comparison was made on accuracy time complexity because application environment needs low...

10.3991/ijim.v12i1.7561 article EN International Journal of Interactive Mobile Technologies (iJIM) 2018-01-23

Fitur yang digunakan untuk mengenali jenis daun meliputi bentuk, warna, dan tekstur. Tidak semua fitur perlu melakukan komputasi hasil ektra ksi, namun diseleksi beberapa paling berpengarauh dalam sistem temu kembali citra daun. Teknik seleksi Correlation based Featured Selection (CFS) pemilihan berdasarkan korelasi antar fitur, sehingga dapat meningkatkan performa dari Jenis diantaranya menggunaka CFS, CFS dengan Genetic Search (GS), chi square. Analisis keterkaitan melalui juga...

10.12962/j24068535.v12i1.a39 article ID cc-by-sa JUTI Jurnal Ilmiah Teknologi Informasi 2014-01-01

Mobile based culinary recommendation system has received significant attention in recent mobile application research . Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) regained popularity supporting multi-criteria decision making due this method allowing inclusion many factors and criteria into the process. Previous works on scenario reveal that TOPSIS stand out from other approaches like AHP Fuzzy providing a lightweight computation algorithm have promising...

10.3991/ijim.v12i3.7799 article EN International Journal of Interactive Mobile Technologies (iJIM) 2018-07-20

Nutritional food is the most important aspect for people to fulfil their daily needs, but nowadays, change of lifestyle can affect style consumption, instance leaving when they take a meal. Besides, leftover causes loss consumed nutrients. We took an observation in canteen Faculty Agricultural Technology University Brawijaya produces lost about 1,142.5 gram per day. To prevent amount waste, this paper proposes early stage framework create automatic estimation method using image segmentation...

10.1109/siet48054.2019.8986104 article EN 2019-09-01

Indonesia has various cultures and consequently, it also huge selection of traditional foods. Since there is new style people sharing food images in several social media before eating nowadays, have benefit to explore more information, such as recommendation place eat particular food. When travel one another they an intention enjoy the local food, but some them may not acknowledge name especially for those who a residence that place. By spreading others, can help other finding recommended...

10.1109/siet48054.2019.8986058 article EN 2019-09-01

Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) is an algorithm that can be used alternative design in a decision support system (DSS). TOPSIS provides recommendation so users get information their decision, example tourist wants visit destination Malang, then recommendations destinations the form ranking recommendation, with highest rank most recommended recommendation. TOPSIS-based Mobile Decision Support System (DSS) has relatively low complexity. However, there...

10.26594/register.v7i1.2140 article EN Register Jurnal Ilmiah Teknologi Sistem Informasi 2021-02-15

This research propose an image pattern classification to identify rust disease in sugarcane leaf with a combination of texture and color feature extraction. The purpose this is find appropriate features that can disease. Firstly, normal diseased images are collected pre-processed. Then, shape, extracted from these images. After that, classified by support vector machine classifier. A several used evaluate the distinctive for identification When single used, shape has lowest accuracy 51%...

10.1109/icts.2014.7010565 article EN 2014-09-01

Indonesian people should actively preserve culture. A way to culture can be done by using Javanese scripts as a local content subject at elementary middle school level. In the conventional learning method, almost all teachers teach writing manuscript with instructional media white board. We proposed mobile application that help students learn how write script in attractive their finger. Since this still prototype stage, further study and analysis of usability are necessary validate...

10.25126/jitecs.20183146 article EN cc-by-sa Journal of Information Technology and Computer Science 2018-08-25

Abstrak Karat dan mosaik adalah penyakit pada tebu yang menyerang di Indonesia menimbulkan kerugian. Teknologi informasi untuk deteksi diperlukan dalam menunjang peningkatan produksi dapat menghasilkan panen optimal. Penelitian berkembang identifikasi tanaman melalui citra digital daun belum ada khusus membahas tebu, tetapi mengenai secara umum. ini membangun sistem dengan pemilihan fitur tekstur warna gray level co-occurrence matrix (GLCM) color moments . Tahap awal penelitian pengumpulan...

10.25126/jtiik.201412114 article ID cc-by-sa Jurnal Teknologi Informasi dan Ilmu Komputer 2014-10-30

Malang City has a variety of interesting tourist objects to visit. Determining the desired place visit requires access speed and accuracy favorite places This can be obtained with mobile application that utilizes internet GPS features smartphone. Therefore, Mobile recommender system is needed, which recommends go in Malang. The scope this developed destinations & Batu, beach around Malang, shopping destinations, buy souvenirs, traditional snacks, organic vegetables, cuisine, Korean cafe All...

10.1109/siet48054.2019.8986002 article EN 2019-09-01

The problem of food waste is experienced by many countries, including Indonesia. In the previous Comstock model, estimating scraps required expertise estimator, but this method has drawbacks because subjective perspective even skilled observers. Another weakness occurred when observers were exhausted, which in turn negatively affected measurement leftover estimation. Therefore, paper, we propose an approach for automatic weight prediction using image processing order to minimize error...

10.35741/issn.0258-2724.55.1.32 article EN Journal of Southwest Jiaotong University 2020-01-01

Abstract. Optimal healthy diet in accordance with the allocation of cost needed so that level nutritional adequacy family is maintained. The problem optimal (based on budget) can be solved genetic algorithm. algorithm particle swarm optimization (PSO) has same effectiveness but PSO superior terms efficiency, a lower complexity than However, algorithms and have local optimum because these associated random numbers. To overcome this problem, will improved by combining it simulated annealing...

10.25126/jitecs.20172129 article EN cc-by-sa Journal of Information Technology and Computer Science 2017-06-22

This paper proposes the integration of AHP and TOPSIS to generate ranking results culinary recommendation for a group users provide better results. Formerly, Group Decision Support System (GDSS) recommendations has been developed with method. low algorithm complexity, so it is suitable be applied in mobile devices. However, GDSS its disadvantages, have not able facilitate preferences each user inside result always consist only on dominant user. method produces unchanging rankings, because...

10.21609/jiki.v12i2.729 article EN cc-by-sa Jurnal Ilmu Komputer dan Informasi 2019-07-08

Abstrak
 Seiring perkembangan teknologi dilakukan otomatisasi deteksi kanker kulit melalui citra dermoscopy. Pengambilan informasi fitur dermoscopy terganggu dengan outlier dan overfitting, karena faktor jenis kulit, penyebaran yang tidak merata atau kesalahan sampling. Penelitian ini mengusulkan melanoma mengintegrasikan metode fuzzy K-Nearest Neighbour (FuzzykNN), Lp-norm Linear Discriminant Analysis (LDA) untuk mengurangi overfitting. Masukan berupa warna RGB dinormalisasi menjadi...

10.26594/r.v2i1.443 article ID cc-by Register Jurnal Ilmiah Teknologi Sistem Informasi 2016-01-01

Seiring dengan perkembangan teknologi internet, resep masakan dapat mudah didapatkan dari beragam sumber, seperti website , aplikasi perangkat bergerak, dan media sosial. Banyaknya pilihan yang tersedia di berbagai memiliki satu kekurangan, yaitu belum mengakomodasi preferensi pengguna. Dalam permasalahan ini, peran sebuah Sistem Pendukung Keputusan (SPK) sangat dibutuhkan oleh orang aktif memasak menggunakan dalam kegiatan sehari-hari. SPK rekomendasi dibangun algoritme Simple Additive...

10.22146/jnteti.v8i3.518 article ID cc-by-sa Jurnal Nasional Teknik Elektro dan Teknologi Informasi (JNTETI) 2019-08-30

Exercising can make the body produce more endorphins so people with regular exercise are resistant to stress than those who have little physical activity. We get a recommendation of sport venue in search engine, but it can’t accommodate personal preference. The mobile application for sports recommendations (M-health) specific attribute weighting that user preference be implemented Technique Order Preference by Similarity Ideal Solution (TOPSIS) algorithm. TOPSIS was chosen as algorithm...

10.35940/ijitee.e2490.049620 article EN International Journal of Innovative Technology and Exploring Engineering 2020-04-30

Malang is one of the tourist destinations in East Java, and always visited by both domestic foreign tourists. However, isn’t first destination tourism, this due to lack intense promotion. Virtual tourism a virtual reality technology for promoting tourism. Based on these problems, researchers developed application that can provide immersive experiences users assembled with Malang. Application was using React 360 framework, because its ease development be various platforms. The Software...

10.18860/mat.v15i1.23000 article EN Matics Jurnal Ilmu Komputer dan Teknologi Informasi (Journal of Computer Science and Information Technology) 2023-08-14

The Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) algorithm was chosen as an making recommendations in many mobile recommender system application, such mobile-based sports venue recommendation system. In the previous work, usability testing conducted test user acceptance of but reliability TOPSIS hasn't been tested yet. accuracy is very subjective problems terms recommendations, therefore, this research proposed rank consistency find out if there a reversal (the...

10.1145/3427423.3427455 article EN 2020-11-16

Seiring perkembangan teknologi dilakukan otomatisasi deteksi kanker kulit melalui citra dermoscopy. Pengambilan informasi fitur dermoscopy terganggu dengan outlier dan overfitting, karena faktor jenis kulit, penyebaran yang tidak merata atau kesalahan sampling. Penelitian ini mengusulkan melanoma mengintegrasikan metode fuzzy K-Nearest Neighbour (FuzzykNN), Lp-norm Linear Discriminant Analysis (LDA) untuk mengurangi overfitting. Masukan berupa warna RGB dinormalisasi menjadi RGBr. Reduksi...

10.26594/register.v2i1.443 article ID cc-by Register Jurnal Ilmiah Teknologi Sistem Informasi 2016-01-01

Indonesia has a lot of cultural buildings that need to capture as digital objects for other purposes, especially preservation. One the methods making 3D is using photogrammetry method. The method makes many photos captured by camera will be integrated into software and processed objects. In this research, framework modeling building proposed based on approach. This includes data capture, processing, calibration. was tested while object Candi Badut temple reported model significantly had...

10.14569/ijacsa.2022.0130566 article EN International Journal of Advanced Computer Science and Applications 2022-01-01

Recipes are used as a reference in processing cooking ingredients to meet personal nutritional needs, considering the make food sold freely that is not necessarily guaranteed quality and safe consume, especially during pandemic it today. So itself becomes better alternative for community. With large number of recipe options available various media, role Decision Support System needed by people who will get recommendations. Research related recommendations have been done using SAW only some...

10.25126/jitecs.202163363 article EN cc-by-sa Journal of Information Technology and Computer Science 2021-12-24
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