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All Journal Media Kesehatan Masyarakat Indonesia Jurnal Reka Lingkungan Al-Jabar : Jurnal Pendidikan Matematika Desimal: Jurnal Matematika Indonesian Journal of Chemistry JURNAL PENELITIAN RELIGIA Edugama: Jurnal Kependidikan dan Sosial Keagamaan Humantech : Jurnal Ilmiah Multidisiplin Indonesia Scientica: Jurnal Ilmiah Sains dan Teknologi
Salafudin Salafudin, Salafudin
Program Studi Teknik Kimia, FTI, itenas Bandung, Jl. PHH. Mustafa No 23 Bandung
Religion Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Public Health Social Sciences Other

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Sentiment analysis using fuzzy naïve bayes classifier on covid-19 Putri, Zhurwahayati; Sugiyarto, Sugiyarto; Salafudin, Salafudin
Desimal: Jurnal Matematika Vol. 4 No. 2 (2021): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/djm.v4i2.7390

Abstract

Fuzzy Naive Bayes Classifier method has been widely applied for classification. The Fuzzy Naive Bayes method which consists of a combination of two methods including fuzzy logic and Naive Bayes is used to create a new system that is expected to be better. This research aim to find out the society's sentiments about COVID-19 in Indonesia and the use of the results of the Fuzzy Naive Bayes Classifier. The data of this research is obtained by scraping on Twitter in the period from January 1, 2020 to April 30, 2020. The classification method used in this research is the Fuzzy Naive Bayes Classifier method by applying the fuzzy membership function. In this research, sentiment analysis uses input data whose source is taken from tweets and the output data consists of sentiment data which is classified into three classes, namely positive class, negative class, and neutral class. In the distribution of training and testing data of 70%: 30%, the accuracy of the classification model using the confusion matrix is 83.1% based on 1199 tweet data consisting of 360 testing data and 839 training data. Also the presentation of each sentiment class was obtained which was dominated by positive sentiments, namely the positive class by 36.7%, the negative class by 35.0%, and the neutral class by 28.3%. Based on the results of the presentation, it can be concluded that there are still many people who have positive opinions or give positive responses to the presence of COVID-19 in Indonesia.
Synthesis of Lithium-Aluminum Layered Double Hydroxide Adsorbent from Aluminum Waste to Create a More Environmentally Friendly Process for Recovering Lithium in Brine Salafudin, Salafudin; Prasetya, Agus; Warmada, I Wayan; Petrus, Himawan Tri Bayu Murti
Indonesian Journal of Chemistry Vol 25, No 4 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.97024

Abstract

All countries pledged to strive to limit global warming. The implementation of renewable energy must be accelerated. One of the most essential components of renewable energy is lithium-ion batteries. The surging demand for lithium necessitates new technologies for direct recovery from brine. One of the most promising methods is adsorption. Because of its advantages, lithium-aluminum layered double hydroxides have started their application on a commercial scale. This research uniquely explores the synthesis of lithium adsorbent from aluminum waste, an approach that is both cost-effective and environmentally sustainable. The reaction behavior was studied, including the rate of hydrogen gas production and the co-precipitation process. The quality of the product was assessed by its adsorption capacity and characterization. The synthesis of lithium adsorbent was successfully performed through two-step processes, with the reaction kinetics studied at temperatures between 30 and 60 °C. XRD and FTIR results confirmed the adsorbent product. The adsorbent worked well for synthetic brine with 39–1350 ppm lithium concentration and adsorption capacity until 6.7 mg lithium ion per g of adsorbent. These findings contribute to the development of sustainable technologies for lithium extraction and can be applied to improve industrial lithium recovery processes.
Pembelajaran Sains yang Rahmatan Lil ‘Alamin Salafudin, Salafudin
Edugama: Jurnal Kependidikan dan Sosial Keagamaan Vol. 4 No. 2 (2018): Edugama: Jurnal Kependidikan dan Sosial Keagamaan
Publisher : PASCASARJANA IAIN SYAIKH ABDURRAHMAN SIDDIK BANGKA BELITUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32923/edugama.v4i2.790

Abstract

Abstract Science and technology have great benefits for mankind. But science can also be a punishment for humans. In other words, science has positive and negative values for humans. Efforts need to be made to minimize the negative side of science and increase its benefits, so that science is present as a blessing for the universe. Science that is rahmatan lil ‘alamin is a science that can implement the values of rahmatan lil ‘alamen thus bringing humanity to a life that is prosperous, safe, peaceful and egalitarian. Such science is expected to bring harmony to life. Not only brings prosperity to humans, but also to all beings on earth. Efforts to present the science of rahmatan lil ‘alamien are carried out with science learning integrated with rahmatan lil ‘aalmaien Islamic values. Science learning that rahmatan lil ‘alamin has several characteristics, among others: presenting a non-pragmatic intention in learning science, linking faith to God with natural phenomena, science learning is contextual, science learning is associated with values, culture and beliefs. The implementation rahmatan lil ‘aalamin science learning requires the hard work of all parties considering the current reality of science learning still oriented towards the West. This is due to the lack of concrete examples of learning models and alternative science books. Abstrak Sains dan teknologi memberi manfaat yang besar bagi umat manusia. Namun sains juga bisa menjadi azab bagi manusia. Dengan kata lain, sains mempunyai nilai positif dan negatif bagi manusia. Perlu dilakukan ikhtiar untuk meminimalisasi sisi negatif sains dan memperbesar manfaatnya, sehingga sains hadir sebagai rahmat bagi semesta. Sains yang rahmatan lil ‘alamin merupakan sains yang bisa mengimplementasikan nilai-nilai rahmatan lil ‘alamien sehingga membawa umat manusia pada kehidupan yang sejahtera, aman, damai dan egaliter. Sains yang demikian diharapkan akan memunculkan harmoni kehidupan. Bukan hanya memunculkan kesejahteraan bagi manusia, melainkan juga bagi seluruh makhluk di muka bumi. Upaya menghadirkan sains yang rahmatan lil ‘aalamien dilakukan dengan pembelajaran sains terintegrasi dengan nilai-nilai islam rahmatan lil ‘aalmaien. Pembelajaran sains yang rahmatan lil ‘alamin mempunyai beberapa karakteristik antara lain: menghadorkan niat yang tidak pragmatis dalam mempelajari sains, mengaitkan keimanan kepada Tuhan dengan fenoma alam, pembelajaran sains bersifat kontekstual, pembelalajaran sains dikaitkan dengan nilai, budaya dan keyakinan. Implementasi pembelajaran sains yang rahmatan lil ‘aalamin memerlukan kerja keras semua pihak mengingat realitas saat ini pembelajaran sains masih berkiblat ke Barat. Hal ini disebabkan minimnya contoh konkret model pembelajaran maupun buku sains alternatif.
Co-Authors ADI SEMARTA, I WAYAN WINDU Agus Prasetya Ahmad Taufik Anissa, Lentiani Anwar, Arif Sayfulloh Asifha, Nesha Tri Dinata, Faishal Hafizh Fadillah, Fitri Nur Fetok, Maria Merdiana Hartati, Etih Hidayatullah, M. Arif Hikmah , Nurul Himawan Tri Bayu Murti Petrus I Wayan Warmada Luvena, Zachra Apsari Manaf, Irfan Musadi, Maya Ramadianti Nurfadhilah , Sri Ainun Parapat, Riny Yolandha Pratama, Muhammad Rivaldi Putri, Zhurwahayati Sandjaya , Edward Santika Lya Diah Pramesti Sri Handayani Suci Wulandari Sugiyarto Sugiyarto Suti Pertiwi, Ajeng Feby Trianingtias, Sontika Rahma YUHANIANSYAH, NISA YUHANIANSYAH, NISA Yulianti Pratama Yulianti, Almaida Yusuf, Abdul Mazid