No abstract

University of Harapan Medan is one of the private universities in North Sumatra which has computer-based study programs such as Informatics Engineering and Information Systems. Every year this college receives many registrations from students who have completed their education at the school stage. The large number of incoming student data makes it difficult for the admin to select new students who will register. In this study using the C4.5 algorithm data mining method to map the pattern of student admissions selection in the field of Engineering and computers. The attributes used are the average value of report cards (high, enough, low), basic academic ability tests (very high, high, medium, low, very low), basic computer knowledge tests (very high, high, enough, low, very low) and interviews (good, bad). Data mining is a mathematical calculation process that uses algorithms and requires large data. While the C4.5 algorithm is an algorithm that processes data by calculating entrophy and information gain, where after the calculation process is carried out, those who get the largest information gain value will become nodes and branches. This C4.5 algorithm will describe a decision tree that will form a pattern in student selection. The results of this study indicate that in mapping the selection pattern of interview attributes into level 1 nodes, the attributes of the basic computer knowledge test become the level 1 branch, the attributes of the basic academic ability test become the level 2 branch and the attribute average value of report cards becomes the level 3 branch.

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.

In internet, an ad is something that able to be avoided when opening a web page. At this time many internet based businesses rely on advertising for their income. However, users are dissatisfied with the presence of ads on websites they visit, since the size of the ad data is often proportional to the actual content ads. This impacts not only on loading web pages and may lead to a file that may potentially be a carrier of the virus and may damage the operating system of the visitor. A system that can overcome the annoying ads will be needed by the user for the convenience of users in using the internet media. To overcome this will be built a system using the pi-hole and Ubuntu operating system

Perkembangan teknologi saat ini telah banyak dimanfaatkan manusia. Tidak hanya dalam perindustrian dan perusahaan, namun telah merambah pada dunia pendidikan, dimana penggunaan perangkat komputer dan aplikasi tersebut  digunakan oleh guru dan murid. Dalam penggunaan komputer berbasis online dibutuhkan akun google yang dapat dimanfaatkan untuk mengakses email dan aplikasi media google lainnya seperti google classroom, google meet, google drive, google doc, google slide, google calendar, google form dan lain sebagainya. Pelatihan ini dilakukan pada SD Negeri 060856 Medan dengan memanfaatkan akun google sebagai media pembelajaran berbasis digital. Pelatihan ini bertujuan untuk menambah pengetahuan dan wawasan guru dalam membuat pembelajaran yang menarik serta  meningkatkan efektivitas pembelajaran terhadap siswa berbasis digitalisasi. Hasil dari kegiatan ini guru dapat memahami penggunaan media tools seperti gmail, google classroom dan google meet.