The immune system of children are weaker than adults. They are susceptible to diseases. One of the diseases that often affects them is respiratory disease. Expert systems can be used to determine early diagnosis of it. Certainty Factor allows the user to measure the certainty’s degree of the diagnosis. It is also affecting the level of trust. It is easy for users to make decisions in determining the healing step. Symptoms of the disease are analysed and managed into the knowledge base of the expert system. The result of disease diagnosis is appeared in the form of disease data. The result data are accompanied by certainty value or percentage of confidence that obtained by certainty factor method applied.
The database is already a mandatory requirement for program makers in designing an application relating to records or transactions that require continuous data, the database is used as a data center that can be used to take out a policy in the future. Database must consider many factors ranging from storage, security, ease of accessing the database, the database selection of many factors used speed is the most important factor in the selection of database. PostgreSQL and MySQL is a database that is widely used to store data, the database is usually combined with programming language that is easy to use ENTER to store panin formations. Postgresql and Mysql database will be made based on the speed and search from the corresponding tables in each database.Keywords: Database, PostgreSQL, MySQL. AbstrakDatabase sudah merupakan kebutuhan wajib bagi para pembuat program dalam merancang suatu aplikasi yang berkaitan dengan record-record atau pun transaksi yang membutuhkan data yang berkelanjutan, database digunakan sebagai pusat data yang bias digunakan untuk mengambil suatu kebijakan kedepannya.Pemilihan database tentunya mempertimbangkan banyak factor mulai dari kapasitas penyimpanan, keamanan, kemudahan pengaksesan database, dari banyak factor pemilihan database yang digunakan kecepatan merupakan faktor yang paling utama dalam pemilihan database.PostgreSQL dan MySQL merupakan database yang banyak digunakan untuk menyimpan data, database tersebut biasanya dikombinasikan dengan bahasa pemrograman sehingga mudah digunakan untuk menyim panin formasi yang di inginkan.Pengujian database Postgresql dan Mysql akan dilakukan berdasarkan kecepatan dan pencarian data dari tabel yang sesuai di masing-masing database.
At this time in the era of cars that use renewable energy fuels such as electric cars which are highly supported by the government so that it has an impact on used cars based on these problems an analysis is needed. Determining whether or not the price of buying or selling a used car is appropriate is one of the obstacles faced by the community in making decisions when buying or selling a car or vehicle. Therefore, most people choose an alternative by buying a used car that is still good and usable. One way to make price predictions is to use the Machine Learning method. In this study the authors used random forest and decision tree methods to predict car prices. The results of the research on car price prediction analysis using the random forest and decision tree methods have different percentage results. Where using the random forest method there is an accuracy: 72.13% whereas with the analysis of the decision tree method accuracy: 67.21%. So it can be concluded that the Random Forest method has better analytical accuracy than the Decision Tree method.
Perkembangan teknologi yang sangat pesat telah membawa manusia ke kehidupan dengan informasi dan teknologi itu sendiri. Yang mempengaruhi sebagian orang adalah mereka meninggalkan proses pengambilan informasi manual, yang membutuhkan waktu lebih lama untuk mendapatkan atau menemukan informasi yang mereka inginkan. Dengan teknologi informasi yang berkembang saat ini, pengelolaan informasi dapat dilaksanakan dengan lebih efektif dan optimal. Tujuan penerapan teknologi informasi adalah untuk mencapai efisiensi berbagai aspek pengelolaan informasi, yang ditunjukkan dengan kecepatan dan ketepatan waktu pemrosesan, serta ketepatan dan ketepatan informasi. Terdapat beberapa lokasi proyek yang berada di kota mandailing natal yang sedang di kerjakan oleh dinas perumahan umum. Banyak dari pekerja yang berasal dari luar kota mandailing natal membuat pekerja terkadang kebingungan dalam hal pencarian lokasi proyek yang akan dituju. Untuk itu lah di perlukan suatu sistem yang dapat membantu kinerja pekerja supaya dapat optimal.
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