Kelulusan tepat waktu adalah salah satu indikator keberhasilan mahasiswa dalam memperoleh gelar sarjana. Dalam praktiknya, mahasiswa tidak dapat selalu menyelesaikan pendidikan sarjana dalam empat tahun. Kelulusan tepat waktu adalah salah satu indikator penilaian kualitas pendidikan tinggi karena salah satu penilaian akreditasi Badan Akreditasi Pendidikan Tinggi Nasional (BANPT). Jumlah lulusan dalam 7 tahun terakhir mahasiswa S-1 yang lulus tepat waktu tidak mencapai 50%. Dalam jangka panjang, hal ini dapat menyebabkan penumpukan mahasiswa di UIN Syarif Hidayatullah di Jakarta dan tentu saja akan menghasilkan penurunan nilai akreditasi untuk Program Studi dan Universitas. Dalam penelitian ini, digunakan teknik data mining, algoritma C4.5 untuk mendeteksi lebih dini mahasiswa yang lulus terlambat, Algoritma C4.5 adalah algoritma yang sudah banyak dikenal dan digunakan untuk klasifikasi data yang memiliki atribut-atribut numerik dan kategorial. Pada penelitian ini menghasilkan Algoritma C4.5 dapat memprediksi kelulusan mahasiswa tepat waktu dengan nilai Accuracy 75,52 %, Precision 75,50%, dan Recall 75,50 %.
Limited land in the city of Bekasi is not an obstacle to farming. The idea that sparked in the minds of the residents of Mustika Jaya, Bekasi City was to form an Amanah Hidroponik Farmer Group in the Cimuning sub-district, Mustika Jaya District, Bekasi City as a Beginner's group with the inspiration to grow plants on public facility land called hydroponics. The problems faced are the low role and participation of residents in efforts to record ppm data and water temperature every 1 hour and a lack of knowledge about the importance of the data recorded on ppm data and water temperature every 1 hour. Through this community service activity, Training is given to farmers to monitor changes in PPM and water temperature through the application of digital technology. The ease of processing ppm information through the Android mobile application in real-time and the ability and success of mixing nutrient water and clean water by the ppm value that has been determined for the nutrition of each type of plant. This community service activity provides benefits for hydroponic plant farmers in controlling nutritions and monitoring plants. Apart from that, it can also reduce the risk of crop failure because it is controlled using a smartphone and also in real-time.
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