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All Journal Infotech Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) JSiI (Jurnal Sistem Informasi) Jurnal Pengembangan Riset dan Observasi Teknik Informatika YUSTISI Yustisi: Jurnal Hukum dan Hukum Islam GOVERNANCE: Jurnal Ilmiah Kajian Politik Lokal dan Pembangunan Al Jahiz: Journal of Biology Education Research Journal of Management Studies and Development Jurnal Ekonomika dan Bisnis Jurnal Manajemen, Pendidikan dan Pemikiran Islam Jurnal Penelitian Hasil Hutan Jurnal Pendidikan Islam Al Ikhlas
Saefudin
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Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Physics Social Sciences Other

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ANALISIS KELAYAKAN PEMBERIAN KREDIT MENGGUNAKAN ALGORITMA C4.5 PADA KOPERASI SIMPAN PINJAM MIDUK JAYA ABADI SEJAHTERA Saefudin; Michael Chalisto Simbolon; Anharudin
Pengembangan Riset dan Observasi Teknik Informatika Vol 12 No 2 (2025)
Publisher : Universitas Serang Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30656/protekinfo.v12i2.10876

Abstract

Intisari – Pemberian kredit oleh koperasi memerlukan evaluasi kelayakan yang akurat agar dapat meminimalisir risiko kredit macet. Penelitian ini menerapkan algoritma C4.5 untuk melakukan klasifikasi kelayakan kredit berdasarkan atribut data peminjam, yaitu usia, penghasilan, jumlah pinjaman, angsuran, dan jangka waktu. Algoritma C4.5 digunakan untuk membangun model pohon keputusan berdasarkan perhitungan entropy dan information gain. Pengujian dilakukan menggunakan RapidMiner untuk mengevaluasi performa model dengan metrik akurasi, presisi, dan recall. Hasil analisis menunjukkan bahwa algoritma C4.5 dapat digunakan secara efektif dalam pengambilan keputusan pemberian kredit dengan akurasi mencapai 61,14%.  
Meningkatkan Keterlibatan Kognitif Siswa melalui Project Based Learning dan Pengaruhnya terhadap Sikap Bermedia Sosial Khanifah, Milatul; Saefudin
Jurnal Pendidikan Agama Islam Vol 2 No 1 (2025): Jurnal Pendidikan Agama Islam
Publisher : Sekolah Tinggi Agama Islam (STAI) AL-IKHLAS DAIRI SIDIKALANG

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study aims to determine the effect of the Project-Based Learning (PjBL) model on knowledge and attitude outcomes regarding the topic of etiquette in using social media. The type of research used is quantitative with a quasi-experimental design, specifically the non-equivalent control group design. The data collection techniques employed were tests and questionnaires. The research instruments consisted of a knowledge test and an attitude questionnaire.This study was conducted at SMK Mulya Husada Purwokerto, with the population being all 11th-grade students and the samples being students from Pharmacy class 1 and Pharmacy class 3. The data analysis technique used was non-parametric tests, namely the Mann-Whitney test.The results of the study showed that the PjBL model can improve both knowledge and attitudes, as indicated by Mann-Whitney test results, with an Asymp. Sig. (2-tailed) value of 0.000, which is less than 0.05. Therefore, the null hypothesis (H0) is rejected and the alternative hypothesis (Ha) is accepted. There is a significant effect of using the Project-Based Learning model in improving learning outcomes in Islamic Religious Education (PAI) subjects for 11th-grade students at SMK Mulya Husada Purwokerto
Evaluation of Concept Mastery and Representation Skills Assessment in High School on Nervous System Material Juniarti, Mia Angriana; Yanti; Saefudin
Al Jahiz Vol 6 No 2 (2025): Al-Jahiz: Journal of Biology Education Research, July-December 2025 (In Progress)
Publisher : Fakultas Tarbiyah dan Ilmu Keguruan UIN Jurai Siwo, Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32332/al-jahiz.v6i2.10907

Abstract

Learning demands that students not only memorize facts but also understand concepts in depth to be able to accurately represent scientific phenomena. This research aims to produce a valid assessment of concept mastery and representation skills. This research used descriptive quantitative method with a total of 60 Grade XI students who had received nervous system material. The validity instrument test of concept mastery and representation skills were analyzed based on logical validity and empirical validity. The results of the logical validity of concept mastery questions by expert validator lecturer of 92.69% and biology teacher of 100% indicate that this instrument is highly valid to measure student understanding of nervous system material. The results of the logical validity of the representation skills question by expert validator lecturer of 73.10% and biology teacher of 100% indicate that the test instrument is valid to measure students' representation skills, but moderate revisions are needed. On the other hand, results of empirical validity show that multiple choice questions have a validity of 0.56 and reliability of 0.72, while essay questions have a validity of 0.46 and reliability of 0.63. Thus, the instruments test of concept mastery and representation skills of nervous system material fall into the moderately valid to highly valid category.
Determinant Factors in Stock Returns of Food and Beverage Industry Companies in Indonesia Rohman, Muhammad Amin Fatkur; Saefudin
Journal of Management Studies and Development Vol. 3 No. 01 (2024): Journal of Management Studies and Development
Publisher : The Indonesian Institute of Science and Technology Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56741/jmsd.v3i01.448

Abstract

This study aims to analyze the influence of internal and external factors on stock returns in destroying the food and beverage industry listed on the IDX from 2011 to 2021. The sample in this study used a purposive sampling technique or was based on specific criteria with 12 companies. This research data is panel data, namely a combination of times series and cross-section data, which is tested statistically using Stata. Three data analyses are used: model estimation test, model selection, and static panel regression model estimation results with the criterion of a P value < 0.05, so there is a significant influence between the independent and dependent variables. The research results prove that the best model chosen is the CEM model. The research results demonstrated that the variables ROE (P Value: 0.543 > 0.05), DER (P Value: 0.491 > 0.05), interest rates (P Value: 0.373 > 0.05), and inflation (P Value: 0.165 > 0.05) statistically does not affect stock returns. However, the exchange rate variable (P Value: 0.005 < 0.05) significantly impacts stock returns. The research results also prove that ROE, DER, interest rates, exchange rates, and inflation can explain stock returns of 12.30%. In comparison, the remaining 87.70% is influenced by other variables not included in the research.
Empowerment of Small and Micro Enterprises (SMEs) in Indonesia: The Impact Venture Capital Assistance, Entrepreneurial Orientation, and Digital Transformation on the Performance of SMEs Saefudin; Arbianti, Siska
Journal of Management Studies and Development Vol. 3 No. 03 (2024): Journal of Management Studies and Development
Publisher : The Indonesian Institute of Science and Technology Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56741/jmsd.v3i03.676

Abstract

This study investigates the impact of venture capital assistance from LazisMu, entrepreneurial orientation, and digital transformation on the performance of Micro Small Enterprises (SMEs) in Karanganyar Regency. A quantitative approach was used by collecting data from 122 SME respondents who received assistance from LazisMu and have adopted digitalization in the marketing of their products. The data was analyzed using the Smart PLS method to test the relationship between variables. The results showed that business capital assistance from LazisMu has a significant effect on SME performance. However, entrepreneurial orientation has no significant effect. In contrast, digital transformation has a significant impact by improving the operational efficiency and business strategy of SMEs, helping them compete more effectively in a competitive market. This research provides important insights for LazisMu policies and similar institutions to support SMEs more effectively with follow-up research and qualitative approaches to understand more deeply the influence factors.
Profil Kemampuan Berpikir Kreatif dan Komunikasi Ilmiah Siswa SMP pada Materi Teknologi Ramah Lingkungan Nurdian, Dine; Saefudin; Amprasto
Jurnal Penelitian Pendidikan IPA Vol 9 No 10 (2023): October
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i10.3884

Abstract

Students' creative thinking and scientific communication skills are needed by students so they can compete healthily and be able to solve various increasingly complex problems in the 21st century. This research aims to determine the profile of student's creative thinking and scientific communication abilities in learning environmentally friendly technology. The method used in this research is quantitative descriptive. The research sample consisted of 35 students, 16 men and 19 women. The instrument used is an essay test on environmentally friendly technology material. For creative thinking skills, indicators for fluent thinking, flexible thinking, original thinking, and the ability to elaborate are used, while for scientific communication indicators for representing knowledge are used. From the results of data analysis, it show that only 1 student (3%) has creative thinking abilities in the high category, 21 students (60%) in the medium category, and 13 students (37%) in the very low category. Students' scientific communication skills for indicators represent 4 students in the very high category (11.4%), 2 students in the high category (5.7%), 10 students in the medium category (28.6%), and 2 students in the low category. (5.7%), and 17 students (48.6%) in the very low category. So students' overall creative thinking and scientific communication abilities must be improved.
Exploring Students’ Perceptions of Outdoor Biology Learning Activities in Botanical Garden Hastika, Asyah Dwi; Saefudin; Supriatno, Bambang
Jurnal Penelitian Pendidikan IPA Vol 10 No 5 (2024): May
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i5.6718

Abstract

Outdoor learning has become a relevant learning method to enrich students' learning experience in biology. Botanical gardens, as places that reflect biodiversity, offer unique potential for integrating outdoor learning. This study aims to describe students' perceptions of outdoor learning that has been carried out in the botanical garden as well as the potential and barriers. This research method is a case study. Data collection techniques were questionnaires, structured and semi-structured interviews. The sampling technique used was convenience sampling with a sample of 32 class x students at one of the high schools in Bandung. Responses were expressed in perception numeric index to quantitatively reveal the perceptions of grade 10 students towards the outdoor learning experience that has been carried out. The results revealed that out of 32 respondents, most students showed positive perceptions towards outdoor learning in the botanical garden with a mean index = 55.23 (range 42.5-65.0) with standard deviation (sd) = 6.0. This perspective is influenced by the potential and obstacles in the implementation of outdoor learning conducted in botanical gardens. The implications of this study open up opportunities to design learning strategies that are more effective and can be applied by teachers in organizing biology learning at the high school level.
IMPROVEMENT ON SEVERAL PHYSICAL AND MECHANICAL PROPERTIES OF JATI UTAMA NUSANTARA WOOD BY THERMAL COMPRESSION TREATMENT Efrida Basri; Saefudin
Jurnal Penelitian Hasil Hutan Vol. 39 No. 3 (2021): Jurnal Penelitian Hasil Hutan
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2021.39.3.121-128

Abstract

Jati Utama Nusantara (JUN) is one type of growing regime of fast grown teak (Tectona grandis Linn. F) derivedfrom Jati Plus Perhutani (JPP). JUN trees have fewer branches and a more cylindrical-shaped trunk, as well asexhibit rapid growth compared to the teak cultivated from seed (conventional); accordingly, they can beharvested in a shorter time. Despite its fast growth, some studies showed that the wood had not met the SNI01-0608 standard as raw material for furniture. The research aimed to improve several physical and mechanicalproperties of young JUN wood through thermal compression treatment. The test sample for 5-year-old JUNwood was prepared with a size of 2.5 cm (thickness/radial) by 10 cm (width/tangential) by 30 cm(length/longitudinal), then compressed using a 25 kg/cm2-pressure for 40 minutes in three temperaturetreatments of 170°C, 180°C, and 190°C. Testing of wood mechanical and physical properties referred to ASTMD143. The wood crystallinity was observed using an X-Ray Diffractometer (XRD), and the wood surface wasobserved visually. Wood cell structure as supporting data was observed using a stereo-capable microscope(Zeiss). The results revealed that the thermal compression could improve the physical and mechanicalproperties of the densified JUN samples compared to the nonthermally compressed samples. Based on datasimulation, the wood samples' best physical and mechanical properties occurred at approximately 185°C's heatpress.
POTENSI ANTIOKSIDAN DAN SIFAT SITOTOKSIS EKSTRAK KULIT KAYU SEMBILAN JENIS TUMBUHAN DARI TAMAN NASIONAL LORE LINDU Saefudin; Efrida Basri
Jurnal Penelitian Hasil Hutan Vol. 34 No. 2 (2016): Jurnal Penelitian Hasil Hutan
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2016.34.2.137-145

Abstract

Bark extracts of nine plant species from Lore Lindu National Park (NP) had been studied for the antioxidant potential and their cytotoxic effects. The antioxidant activity was tested by determining the peroxidevalue (POV) using the iodometric method. The toxicity test was done by counting the death of shrimp larva (Artemia salina) using Brine Schrimp Lethality Test (BSLT) method. The test results showed three bioactive components (saponin, flavonoid, and polyphenol) were mostly obtained fromthe 3 plant species that have low POV, namely Dysoxylum gaudichaudianum, Gardenia augusta, and Nauclea orientalis. The most striking of cytotoxic effects (LC50< 200 μg/ml) were found from Koordersiodendron pinnatum (170.86 μg/ml), Nauclea orientalis (182.89 μg/ml), and Kleinhovia hospita (191.35 μg/ml) extracts.
AKTIVITAS ANTIOKSIDAN PADA ENAM JENIS TUMBUHAN STERCULIACEAE Saefudin; Sofnie Marusin; Chairul
Jurnal Penelitian Hasil Hutan Vol. 31 No. 2 (2013): Jurnal Penelitian Hasil Hutan
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2013.31.2.103-109

Abstract

Plants of Sterculiascas buve long been and at traditional medicines. Nine extracts of leaf, bark, and nuts of six Sterculiacnat species were evulnated for their antincidunt activity. Antioxidant activities were determined in vitro by free radical scavenging assay atay using 2.2-diphenyl-1-picrylhydrazyl (DPPH) radical Asorbic acid was wond at control. Among the 9 methanel otrasti testid, & showed antiradical DPPH attisties more than 50%, though still lower than the auerbic acid. Material extracted from bark showed the bigbest activity, in which the extract of Prerospermum javanicum's burk proudnod the highest antccidant activity (92.02), Plytubemical screening on three antacidant compted an arcation intees the high antecidant activities and the polyphenol compounds contained of the plant. Parts of plants that contain medio to many polyphenols, generally bare antisocidant actly abate 80 %.
Co-Authors Abdul Hopid Anafih, Erwinda Sam Anharudin Arbianti, Siska Bambang Supriatno Chairul Efrida Basri Hasni Dyah Kurniawati Amin Wahyudi, Hasni Dyah Kurniawati hastika, asyah dwi HERU SISWANTO Idris Abas Imfrianti Augtiah Indradewa, Rhian Islamiati, Diah Juniarti, Mia Angriana Khanifah, Milatul Mario Jufri Michael Chalisto Simbolon Mr Amprasto Muhammad Amir Anshori Muhammad Hatta Minulyo Muhammad Raja Miftah Hidayatullah Muhammad Yusuf Ariyadi Nafis, Fairuza Nurdian, Dine Rizkialja, Aeka Ilham Rohman, Muhammad Amin Fatkur Sofnie Marusin Sulaiman Kurdi Susandi, Diki Yanti Yuliana Saryip Wijayanti