Elections in Indonesia have taken place since 1955 to elect a legislature. At a national level, Indonesian people did not elect a president until 2004. For the first time, the president, and members of People's Consultative Assembly will be elected on the same day [1]. The next general election that will be held in Indonesia is next year on 17 April 2019. Related to this situation, discussion and prediction about who is the Presidential candidate in Indonesia become a hot and interesting conversation among Indonesian citizen, and many of them expressed it through social media. Election-related hashtags are some of the most used hashtags among Indonesian netizens, most of them is a form of support to Jokowi and Prabowo, such as #PilihPrabowo (vote for Prabowo) and #AkhirnyaMili-hJokowi (finally vote for Jokowi) [2]. Political campaigns have exploited this vast array of information available on the above platforms to draw insights about user opinions and thus design their campaign strategy. Huge investments by politicians in social media campaigns right before an election along with arguments and debates between their supporters and opponents only enhance the claim that views and opinions posted by users have a bearing on the results of an election [3]. On the other way, the information
Background
Stock market process is full of uncertainty; hence stock prices forecasting very important in finance and business. For stockbrokers, understanding trends and supported by prediction software for forecasting is very important for decision making. This paper proposes a data science model for stock prices forecasting in Indonesian exchange based on the statistical computing based on R language and Long Short-Term Memory (LSTM).
Findings
The first Covid-19 (Coronavirus disease-19) confirmed case in Indonesia is on 2 March 2020. After that, the composite stock price index has plunged 28% since the start of the year and the share prices of cigarette producers and banks in the midst of the corona pandemic reached their lowest value on March 24, 2020. We use the big data from Bank of Central Asia (BCA) and Bank of Mandiri from Indonesia obtained from Yahoo finance. In our experiments, we visualize the data using data science and predict and simulate the important prices called Open, High, Low and Closing (OHLC) with various parameters.
Conclusions
Based on the experiment, data science is very useful for visualization data and our proposed method using Long Short-Term Memory (LSTM) can be used as predictor in short term data with accuracy 94.57% comes from the short term (1 year) with high epoch in training phase rather than using 3 years training data.
Background
The main obstacle for local and daily or weekly time-series mapping using very high-resolution satellite imagery is the high price and availability of data. These constraints are currently obtaining solutions in line with the development of improved UAV drone technology with a wider range and imaging sensors that can be used.
Findings
Research conducted using Inspire 2 quadcopter drones with RGB cameras, developing 3D models using photogrammetric and situation mapping uses geographic information systems. The drone used has advantages in a wider range of areas with adequate power support. The drone is also supported by a high-quality camera with dreadlocks for image stability, so it is suitable for use in mapping activities.
Conclusions
Using Google earth data at two separate locations as a benchmark for the accuracy of measurement of the area at three variations of flying height in taking pictures, the results obtained were 98.53% (98.68%), 95.2% (96.1%), and 94.4% (94.7%) for each altitude of 40, 80, and 100 m. The next research is to assess the results of the area for more objects from the land cover as well as for the more varied polygon area so that the reliability of the method can be used in general
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