Garuda - Garba Rujukan Digital

Utilization of IP LM393 Sensor Module as an Automation System for a Portable Gallon Pump Hardianto, Firman; Shofani, Maya; Kusuma, Hamdan Hadi
Physics Education Research Journal Vol 5, No 2 (2023)
Publisher : Faculty of Science and Education, UIN Walisongo Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/perj.2023.5.2.11099

Research has been conducted on developing an automatic gallon pump based on the IP LM393 sensor. This research aims to provide alternative solutions to avoid direct contact as the cause of COVID-19 transmission. The research method used includes the stages of designing, manufacturing, and testing the automatic gallon pump based on the IP LM393 sensor. The results showed that installing IP LM393 in a portable gallon pump can help people avoid direct contact when pouring water. This research proves that some materials can be sensor barriers at specific distances with an effective light intensity range of 19-23 lux.

Effect of Molarity on Double Layer Photocatalytic Activity ZnO/ZnO:Ag for Metanil Yellow Degradation Anggita, Sheilla Rully; Kusuma, Hamdan Hadi; Sumarti, Heni; Teke, Sosiawati
Physics Education Research Journal Vol 5, No 1 (2023)
Publisher : Faculty of Science and Education, UIN Walisongo Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/perj.2023.5.1.13301

Double layer (DL) ZnO/ZnO:Ag has been synthesized with variations in molarity of 0.1, 0.3, 0.5, and 0.7 M and its application as a degrading agent for methanil yellow dye. This study aims to determine the effect of the molarity of the DL ZnO/ZnO:Ag on crystallinity and photocatalytic activity for methanil yellow degradation. DL ZnO/ZnO:Ag was synthesized using sol-gel technique and deposited with spray coating technique. The results of DL ZnO/ZnO:Ag were characterized by XRD to determine the crystallinity and particle size. The photocatalytic activity was carried out by immersing the DL ZnO/ZnO:Ag layer in 10 ppm methanil yellow solution and irradiating it with UV light for 4 hours and then tested using UV-Vis spectroscopy to get the percentage of methanil yellow degradation. The results showed that the crystallinity of the DL ZnO/ZnO:Ag for all molarity variations had a hexagonal wurtzite structure. Grains size increase as molarity increases from 0.1 to 0.5 M. However, if the concentration continues to be increased to 0.7M, the grain size decreases. Photocatalytic activity is increasing every hour, as indicated by the increasing percentage of degradation. Precursor in 0.5 M has the maximum percentage of degradation is 25.32%.

Profiling and characterizing of banana (Musa paradisiaca) flower bracts-based bioplastic with sorbitol as a plasticizer Ebit Nugroho, Deni; Tri Suryandari, Ervin; Hadi Kusuma, Hamdan; Mujiasih; Kustomo
Al-Kimia Vol 13 No 1 (2025): JUNE
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

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

Banana flower bracts (BFB) are a promising source of starch as a bioplastic material. However, starch-based bioplastics products are primarily stiff and rigid to shape. Polyvinyl alcohol (PVA) may improve the elasticity and increase force resistance of starch-based bioplastics. Therefore, this study aims to analyze the characteristics and determine the optimal combination of BFB starch and PVA concentration for bioplastic production. The BFB were chopped and boiled until soft, soaked in sodium bisulfite solution for 30 minutes, and dried to produce fine powder. The powder was macerated in clean water for two days to produce starch, which was then combined with 0.5 chitosan and various concentrations of PVA. Physical characteristic tests, including Force, tensile strength, elongation, and biodegradation, were measured to determine the best composition. This study found the combination of 0.5 gr of BFB starch, 0.5 gr of chitosan, and 10 ml of PVA improved the capability of bioplastic to hold more than 13 N and tensile strengths up to 25 MPa. Furthermore, increasing BFB concentration is in line with enhanced durability; however, it reduces flexibility. Conversely, PVA significantly increased plasticity and elasticity while maintaining high biodegradability (61.2% per day).

Estimation of crystallite size, density, and compositional of the Ti: Al2O3 single crystal Kusuma, Hamdan Hadi; Ibrahim, Zuhairi; Othaman, Zulkafli
Jurnal Ilmiah Pendidikan Fisika Al-Biruni Vol 9 No 2 (2020): Jurnal Ilmiah Pendidikan Fisika Al-Biruni
Publisher : Universitas Islam Negeri Raden Intan Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/jipfalbiruni.v9i2.7207

The purposes of this research were to estimate the crystallite size, density, and chemical composition of the ingot Ti: Al2O3 crystal grown by the Czochralski method. The crystallite size and composition of Ti: Al2O3 crystals had been determined using x-ray diffraction (XRD) and energy-dispersive x-ray spectroscopy (EDXS). Based on the Archimedes principle, the density of the crystals had been determined. The XRD patterns showed a single central peak with high intensity for all samples. It indicated that all samples had a single crystal. The average value of the samples' crystallite size was in the range of 20.798 nm to 34.294 nm. The ingot crystal density and Ti composition increased from the top to the bottom part because the solid solution was distributed unevenly during the growth process.

Investigating differences in project activities and student digital literacy between learning through electronic workbench and PhET Simulation Susilawati, Susilawati; Azizah, Nisa Awaliyah Nur; Kusuma, Hamdan Hadi
Jurnal Ilmiah Pendidikan Fisika Al-Biruni Vol 10 No 2 (2021): Jurnal Ilmiah Pendidikan Fisika Al-Biruni
Publisher : Universitas Islam Negeri Raden Intan Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/jipfalbiruni.v10i2.10008

Students' digital literacy is very urgent for online learning and requires learning activities for habituation. The purpose of this study was to investigate the comparison of project activity processes and digital literacy, between learning using electronic workbench and PhET simulation. This research method uses a quasi-experimental design, the sample consists of two groups, namely 29 students in the experimental group and 31 students in the control groupselected through purposive sampling techniqueThe data collection technique used a concept understanding test part of digital literacy, observation of the results of project activities and questionnaires about digital literacy. The data analysis technique used inferential analysis and quantitative descriptive analysis. This study uses two applications, namely electronic workbench in the experimental group and PhET simulation in the control group. The differences identified from the aspect of understanding concepts part of digital literacy and practical procedures. This research shows that the practicum process in a virtual laboratory using an electronic workbench N-gain a better conceptual understanding of literacy and laboratory skills related to practical procedures. In the process of implementing the practicum using an electronic workbench, experience is obtained in carrying out more thorough and accurate practicum procedures. In addition, this virtual practicum requires an adequate understanding of the concept of electronic components and the relationship between the measured electrical quantities.

Utilization of IP LM393 Sensor Module as an Automation System for a Portable Gallon Pump Hardianto, Firman; Shofani, Maya; Kusuma, Hamdan Hadi
Physics Education Research Journal Vol. 5 No. 2 (2023)
Publisher : Faculty of Science and Education, UIN Walisongo Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/perj.2023.5.2.11099

Research has been conducted on developing an automatic gallon pump based on the IP LM393 sensor. This research aims to provide alternative solutions to avoid direct contact as the cause of COVID-19 transmission. The research method used includes the stages of designing, manufacturing, and testing the automatic gallon pump based on the IP LM393 sensor. The results showed that installing IP LM393 in a portable gallon pump can help people avoid direct contact when pouring water. This research proves that some materials can be sensor barriers at specific distances with an effective light intensity range of 19-23 lux.

Effect of Molarity on Double Layer Photocatalytic Activity ZnO/ZnO:Ag for Metanil Yellow Degradation Anggita, Sheilla Rully; Kusuma, Hamdan Hadi; Sumarti, Heni; Teke, Sosiawati
Physics Education Research Journal Vol. 5 No. 1 (2023)
Publisher : Faculty of Science and Education, UIN Walisongo Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/perj.2023.5.1.13301

Double layer (DL) ZnO/ZnO:Ag has been synthesized with variations in molarity of 0.1, 0.3, 0.5, and 0.7 M and its application as a degrading agent for methanil yellow dye. This study aims to determine the effect of the molarity of the DL ZnO/ZnO:Ag on crystallinity and photocatalytic activity for methanil yellow degradation. DL ZnO/ZnO:Ag was synthesized using sol-gel technique and deposited with spray coating technique. The results of DL ZnO/ZnO:Ag were characterized by XRD to determine the crystallinity and particle size. The photocatalytic activity was carried out by immersing the DL ZnO/ZnO:Ag layer in 10 ppm methanil yellow solution and irradiating it with UV light for 4 hours and then tested using UV-Vis spectroscopy to get the percentage of methanil yellow degradation. The results showed that the crystallinity of the DL ZnO/ZnO:Ag for all molarity variations had a hexagonal wurtzite structure. Grains size increase as molarity increases from 0.1 to 0.5 M. However, if the concentration continues to be increased to 0.7M, the grain size decreases. Photocatalytic activity is increasing every hour, as indicated by the increasing percentage of degradation. Precursor in 0.5 M has the maximum percentage of degradation is 25.32%.

Rancang Bangun Automatic Parfume Berbasis Arduino Uno Menggunakan Sensor Ultrasonik Al Afda, Mahrunnisa; Kusuma, Hamdan Hadi; Hudawi, Ahmad
Journal of Electrical Engineering and Computer (JEECOM) Vol 5, No 2 (2023)
Publisher : Universitas Nurul Jadid

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33650/jeecom.v5i2.6200

Perubahan kemajuan teknologi yang signifikan tidak terlepas dari pengaruh ilmu fisika yang di terapkan dalam sebuah alat guna mempermudah pekerjaan manusia. Salah satu alat yang dapat di gunakan tanpa perlu melakukan kontak fisik ataupun perhitungan manual ialah sensor digital. Rancang bangun Automatic Parfume berbasis mikrokontroler dengan menggunakan program Arduino Uno yang di gabungkan sensor ultrasonik. Prinsip kerja Automatic Parfume akan berkerja dengan kode program servo dapat bergerak dengan sudut 180 dan kembali ke setting awal pada sudut 0 dengan delay 2-3 detik. Dari hasil didapatkan ketika jarak frekuensi yang di terima sensor ultrasonik mendekati batas jarak yang di tetapkan maka di dapatkan hasil jarak jangkauan yang semakin jauh, namun ketika frekuensi yang di terima sensor ultasonik mendekati batas maksimal yang telah di tetapkan pada coding maka hasil jarak jangkauan semprotan yang dindapatkan menjadi semakin dekat. Dengan demikian rancang bangun dapat di gunakan secara efektif untuk mengatur jarak semprotan sesuai yang di inginkan.

Isolation and characterization of Bacteria in the ancient Javanese Pegon manuscript: “Layang Watu Gunung” Rahmani, Tara Puri Ducha; Ahmad, Nur; Anasom, Anasom; Pertiwi, Salsabiela; Niam, Muhammad Yusrun; Kusuma, Hamdan Hadi; Watson, Lee James
Journal of Natural Sciences and Mathematics Research Vol. 9 No. 2 (2023): December
Publisher : Faculty of Science and Technology, Universitas Islam Negeri Walisongo Semarang

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

This research is one of the efforts and the first step in the preservation of historical ancient manuscripts with an interdisciplinary scientific approach. The Unity of Sciences involved in this research are historical science, archaeology, philology combined with natural sciences such as microbiology and biotechnology approaches. The ancient manuscript whose microorganisms were isolated and observed in this study is an ancient manuscript with Pegon letters titled "Layang Watu Gunung" which dates from the 19th century. Over time, microorganisms can contaminate the paper on the manuscript which can cause damage or biodeterioration. Efforts to preserve historical manuscripts can be started by identifying in advance what types of microorganisms are contaminating the manuscript. From the results of the study, it was found that the microorganisms that contaminate the Layang Watu Gunung Ancient Manuscript are types of bacteria and fungi. For bacteria, the results of the Gram staining test result for contaminant bacteria are Gram Negative Bacteria. This initial research will be the basis for further preservation efforts, the results will be more relevant to be analyzed, especially for other historical manuscripts that are in similar temperature and humidity conditions, namely on the island of Java.

Designing an Interactive Flip-Mind Module on Temperature and Heat Concepts to Facilitate Critical Thinking-Oriented Learning Intan, Wahyu Noor; Susilawati, Susilawati; Kusuma, Hamdan Hadi
JURNAL EKSAKTA PENDIDIKAN (JEP) Vol 9 No 2 (2025): JEP (Jurnal Eksakta Pendidikan)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jep/vol9-iss2/1042

Critical thinking skills are essential for students facing the challenges of the Industrial Revolution 4.0 era. This study aimed to develop and analyze the feasibility of the Flip-Mind interactive module, evaluate the improvement of critical thinking skills, and examine students' responses to its use on temperature and heat materials. This study employed a Research and Development (R&D) method, utilizing the 4D model (Define, Design, Develop, and Disseminate), integrating case-based learning and critical thinking components through interactive HTML5-based features to enhance conceptual understanding. This research employed a pretest-posttest control group design with purposive sampling involving grade XI students from a public senior high school. The validation results indicate that the module is in the "very feasible" category. The improvement in critical thinking skills was indicated by an N-Gain value of 62.7% (moderate category), with an average increase in score of 11%. Students' responses to the module’s use were in the "outstanding" category with a percentage of 82%. These findings suggest that the Flip-Mind interactive module is a practical and feasible alternative to innovative teaching materials for improving critical thinking skills in physics learning. Theoretically, this study enriches the framework of digital learning innovation by demonstrating the integration of case-based and critical thinking-oriented approaches. Practically, the Flip-Mind module offers an effective pedagogical model that can be adapted for interactive and student-centered physics instruction.

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