Conference SENATIK STT Adisutjipto Yogyakarta (Seminar Nasional Teknologi Informasi dan Kedirgantaraan)
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193 research outputs found
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Performance of The 3 Blades Horizontal Savonius Water Wheel With Variation of Angle Deflector
No full textIn Indonesia the needs toward energy has been increasing. Therefore, eco-friendly renewable energy becomes an alternative power source. In relation to the idea, within the conduct of the experimental study the researcher designed a Savonius-type waterwheel with horizontal axis and the waterwheel was tested in the river stream. Then, within the design the researcher applied one waterflow regulator with the angle variation 30˚, 45˚ and 60˚. The study was conducted on river flow with a flow velocity of ± 0.6 m / s. the result is the addition of the deflector angle affects the ability to support the load, the maximum wheel efficiency(Cp) of 0.57
Three-Phase Power Data Logger Using IEM 3255 Schneider Module Based On Internet Of Things(IOT)
No full textMetode pengukuran besaran listrik dalam hal ini pengukuran daya 3-phasa seringkali terkendala beberapa hal, seperti penggunaan beberapa alat ukur untuk beberapa metode pengukuran dan harus dilakukan berulang-ulang untuk mendapatkan akurasi dan presisi data, bahkan terkadang pengukuran harus dilakukan dalam rentang waktu tertentu yang tidak efektif dan efisien. Pengambilan data pengukuran menggunakan alat ukur tersebut dilakukan secara manual dengan memasang modul alat ukur pada obyek yang akan diukur untuk kemudian data tersebut harus dicatat secara manual. Metode ini memiliki potensi terjadinya kesalahan dalam pengambilan dan pencataan data. Dari permasalahan tersebut dikembangkan sebuah metode pengukuran menggunakan modul IEM 3255 untuk pengukuran daya 3-phasa, dimana data pengukuran yang terbaca dapat terhubung pada web server dengan protokol MQTT menggunakan teknologi IoT (Internet of Thing). Dengan metode ini, data pengukuran daya 3-phasa seperti besaran arus, tegangan, daya, frekuensi dan faktor daya dapat tersimpan dan terbaca dari gadeget yang tekoneksi dengan jaringan interne
Keywords Search Correction Using Damerau Levenshtein Distance Algorithm
No full textSearching is one of the important features on the website, but it is not uncommon for users to make typos when typing keywords. Typing errors of these keywords is usually referred to as typo. This study aims to build a system by providing suggestions for correcting typos in the search feature. Keywords search correction are obtained using the Damerau-Levenshtein Distance Approximate String Matching algorithm by to calculate the editing distance of each word in a keywords with each word in the Indonesian word dictionary. Testing was carried out as many as 40 experiments, with 10 keywords and 250 articles taken randomly. The test results show the Damerau-Levenshtein Distance algorithm is able to provide precision and recall values of 91.24% and 89.58% in providing keyword improvement suggestions. With the improvement of the system, each trial increases with precision value of 0.80 and recall value of 0.9
Image Quantization in Psoriasis Using K-Mean Clustering
No full textAlong with technology that is very fast image processing with high quality can be presented and displayed in many ways. The image has detailed information that can cause problems during processing. Image quantization is done as a preprocessing stage to reduce the number of colors in the image so that the resulting image approaches the original image. The purpose of this study is to group clusters of characteristics with the same image value
Effects of Grains Size and Sandblasting Duration to the Surface Hardness of the Casting Product of Used Propeller
No full textThis research carried out the sandblasting process on used aluminum propeller castings with variations in sand grains: 40 mesh, 60 mesh, and 80 mesh with variations of 30 seconds, 60 seconds and 90 seconds. The size of the grain and the varying time result in different surface hardness. The biggest hardness on sandblasting with a grain size of 40 mesh time of 90 seconds is 39.8 VHN, 60 mesh time of 30 seconds is 38.6 VHN, 80 mesh time of 30 seconds is 37.1 VHN, from the photo macro the abrasion of the largest surface material occurs at grain size 40 mesh
Application of Product Moment Correlation and Complete Linkage Clustering Methods in Analyzing the Results of the Lecturer Questionnaire
No full textThe use of questionnaires is needed by a lecturer to make improvements in the implementation of the teaching process in the classroom, so that it can correct deficiencies in the teaching process that has taken place. The results of the questionnaire cannot show the variables that must be corrected by a lecturer based on the item questionnaire. So we need a grouping of data for each variable in the results of the questionnaire. The clustering approach model cannot directly group a variable into an object to be clustered. This study clustered the variables on a questionnaire with the approach of Complete Lingkage Clustering by calculating the distance of the matrix using the Product Moment Corelation to find correlations for each questionnaire variable, so the cluster results obtained were several optimal clusters with the membership of each cluster variables from the questionnaire. Clustering data for questionnaire variables can be applied properly by applying product moment correlation to calculate the distance matrix. The cluster results can show the components of the questionnaire variables that must be corrected by the lecturer
The Supplier Evaluation in Bamboo Karya Manunggal Furniture Industry Using Analytic Network Process (ANP) Method
No full textSuppliers are sources providing the first material where the chain of goods distribution will start. Nowadays, the method of making decisions on the supply of bamboo raw materials for UKM Karya Manunggal is by conventional (intuition), so that it is often inappropriate in selecting the suppliers. Along with the increasingly fierce level of competition in the field of bamboo furniture, Karya Manunggal needs to review the strategy in the competition and to evaluate the ability of suppliers who are the main raw material providers. Therefore, the authors conducted a study that can be used by companies to measure the weight of each supplier by applying the Analytic Network Process (ANP) method. The Analytic Network Process (ANP) method was used to determine the ratio of the inner dependence and the outer dependence and the feedback. There were 7 criteria which were divided into 14 sub criteria and 6 alternatives used in this study. The final result was Arista Bambu with a weight of 0.2327, followed by Pak Wagiyo with 0.2106, Pak Paimin with 0.1737, Pak Gianto with 0.1506, Pak Tofa with 0.1217, and Pak Manto with 0.1107 . This study was assisted by using Super Decision Software, Microsoft Excel
Utilization of Gunungkidul Zeolite Stone as a Catalytic Converter in Motorcycle
No full textOne way to reduce the level of exhaust emissions is catalytic converter addition in the exhaust gas. The alternative material for catalytic converters is zeolite stone which is local material that is widely available in Gunungkidul Regency. This study aims to determine the effect of Gunungkidul zeolite catalytic converters on the absorption of motorbike engine exhaust emission. The side effects of motorbike performance is also evaluated. The results showed that the use of zeolite Gunungkidul stone as a catalytic converter can absorb CO (9,5% - 21,6%) and HC gases (15,5% - 63,9%) quite well and can meet the quality standards of motorcycle exhaust emissions but has side effects to reduce engine performance even though the decrease is relatively small (5%)
Project Optimization of WEB-Based 3d Animation Bus Route Trans Jogja Using CPM
No full textThe making of informative media in the form of three-dimensional animation on Trans Jogja bus routes really requires good project planning so that the process becomes more effective and efficient. In planning a project, it is necessary to consider the time, cost and scope of a project. Project optimization is done by using the Critical Path Method (CPM) method, which is a technique of analyzing network activity activities or project activities that predict total duration. Project optimization planning through the stages starting from the creation of the Work Breakdown Structure, barchart diagrams with Gantt Chart software, critical path calculations, and the final stages with CPM to determine the fastest time possible for the project to be completed. The results of the WBS are obtained by predecessor of each activity and its duration, the calculation of the critical path is 29 days with path a-b-c-d-e-f-g-h-I-j-l-m-n-o, and from the CPM calculation the total float is 0 so the project can be completed on tim
Design of Green Energy Stove: Characteristics of Combustion and Performance
No full textSo far, the rural population of fuel users make firewood stoves from ground or cement. Often waiting is made less efficient and produces a lot of smoke pollution, especially if the level of dryness of the wood is low. From this background, then came the idea for the manufacture of stoves that save fuel wood and minimal smoke pollution. Furthermore, to be able to achieve this goal, in this study a biomass furnace will be developed that has a combustion air regulation system and a firewood drying system before use. Research implementation is divided into furnace design (design and fabrication) and testing (combustion characteristics and performance). Research begins with the design of the dimensions and shape of the furnace to be made. Furthermore, fabrication of stoves from Stainless Steel plate materials will be carried out at the Mechanical Technology Laboratory, IST AKPRIND. The stove produced by the construction will be tested with fuel wood in terms of combustion characteristics and performance. The results show that biomass stoves can be used and produced for household and small-scale industries