Graphene oxide (GO) was synthesized from graphite and also produced from waste materials, such as coconut shell, rice husk, and bagasse. The GO obtained from pure graphite was compared with graphite made from Indonesian biomass (coconut shell, rice husk, and bagasse) that had its silica content removed. The characterization of GO was with X-ray diffraction (XRD) analysis, Fourier transform infrared (FTIR) spectroscopy, and Raman spectroscopy. The XRD images showed the formation of the GO and graphite from various angles and revealed that the chemical reaction had an important role in the formation of the GO particles. This was confirmed by the FTIR and Raman spectra, where the presence of various oxygen functional groups was identified. The FTIR spectra showed that the GO had some functionals oxygen groups within its structure.

The emergence of credit cards as one of the earliest fintech technologies capable of providing benefits to customers or users, the maturity of the system in its application is very important because it is related to user data. Several problems arise including carding crimes or problems from the users themselves. This study aims to determine demographic factors with the effect of using credit cards. Demographic factors (gender, age, marital status and academic) are related to usage activities as well as in paying off credit card bills. Quantitative research is carried out using available datasets. from the dataset will be processed and the required part will be taken. By using the NIST 800-30 framework, it is hoped that it can assist in risk management and assessment, then it will lead to risk tendencies in using credit cards. The final result of the study show that demographic factors including age, academic and marital status able to show the affect activities in paying credit card bills and the reliability of the credit card issuer's system can reduce the impact of default on credit card users.

Kegiatan ini bertujuan untuk memperkenalkan cara pengolohan limbah kardus susu yang tidak terpakai dijadikan barang yang berguna dan mempunyai nilai kepada masyarakat khususnya siswi SMP PLUS Darussalam dan siswi SMK Darussalam. Materi yang disampaikan adalah pemberdayaan siswi dan pelatihan membuat tas tangan dari kardus bekas susu. Adapun Tahapan pelaksanaan yang digunakan adalah 1) Inisiasi program, 2) Sosialisasi kepada siswi terkait kegiatan yang akan dilaksanakan, 3) Pendampingan pembuatan tas, 4)  Evaluasi program. Melalui kegiatan ini siswi SMP PLUS Darussalam dan siswi SMK Darussalam diharapkan mampu membuat karya tas tangan dari kardus susu yang di dampingi para Dosen Akademi Komunitas Darussalam. Hasil dari kegiatan ini para peserta sangat antusias dalam melakukan kegiatan pelatihan ini dikarenakan ini merupakan pengalaman yang berhargag bagi mereka serta menambah pengetahuan baru, dan dari pihak Kepala Sekolah meminta agar kerjasama pelatihan ini tetap terjalin setiap tahunya.