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All Journal INDONESIAN JOURNAL OF APPLIED PHYSICS Jurnal Dimamu
Aini, Khoirul
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Agriculture, Biological Sciences & Forestry Astronomy Computer Science & IT Economics, Econometrics & Finance Education Energy Materials Science & Nanotechnology Physics Other

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Pengaruh Promosi Media Sosial dan Word of Mouth terhadap Keputusan Deposan Memilih Deposito Mantap Aini, Khoirul; Nur'aeni, Nur'aeni; Dimyati, Dadang
Jurnal Dimamu Vol. 4 No. 1 (2024)
Publisher : Ma'soem University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32627/dimamu.v4i1.1338

Abstract

Based on the results of observations and interviews that underlie this research, the fluctuating number of depositors of deposit products is suspected to be influenced by social media promotion and word of mouth at PT Bank Mandiri Taspen KCP Ujung Berung. This study aims to determine the influence of social media promotion and word of mouth on depositors' decisions to choose deposits at PT Bank Mandiri Taspen KCP Ujung Berung, both partially and simultaneously. The subject of this study is the depositors at PT Bank Mandiri Taspen KCP Ujung Berung. The research is quantitative associative in nature, utilizing primary data. Data collection techniques include observation, interviews, literature review, and questionnaires. The sampling technique employed is non-probability sampling with accidental sampling as the method. The population consists of all depositors at PT Bank Mandiri Taspen KCP Ujung Berung, totaling 259 people, with a sample size of 73 people. The data analysis and hypothesis tests used were determination coefficient analysis, multiple regression analysis, multiple correlation analysis, t-test, and F test. The research results show that social media promotion and word of mouth each have a partial impact on depositor decisions, with an influence of 60.3% and 52.8%, respectively. Simultaneously, there is a significant combined effect of 75.8%.
Optimizing Formalin Detection in Fish Using QCM Sensors with TOMAC Membrane Coatings for Product Quality Monitoring Muthmainnah, Muthmainnah; Aini, Khoirul; Tazi, Imam; Chamidah, Ninik; Kusairi, Kusairi
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 14, No 2 (2024): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v14i2.92912

Abstract

Detection of formalin in fishery products is a significant concern in the food industry to ensure consumer safety. This study compared the performance of Quartz Crystal Microbalance (QCM) sensors without a membrane and with a Trioctyl methyl ammonium Chloride (TOMAC) membrane coating in detecting formalin in fish samples. The research findings indicate that QCM without a membrane for formalin samples has a lower detection limit of 150 ppm and an upper detection limit of 350 ppm with a sensitivity of 2194.171 Hz/ppm. On the other hand, QCM with a TOMAC membrane coating has a lower detection limit of 400 ppm and an upper detection limit of 550 ppm with a sensitivity of 842.7551 Hz/ppm. Meanwhile, QCM without a membrane for formalin in fish samples has a lower detection limit of 450 ppm and an upper detection limit of 650 ppm with a sensitivity of 15386.38 Hz/ppm. At the same time, QCM with a TOMAC membrane coating for formalin in fish samples has a lower detection limit of 350 ppm and an upper detection limit of 500 ppm with a sensitivity of 23108.9 Hz/ppm. Response time analysis shows that both sensors reach a steady state condition after 12 seconds. This study highlights the importance of selecting appropriate sensors for detecting formalin in fishery products, considering detection limits, sensitivity, and response time as crucial criteria. Thus, these findings can guide the fisheries industry in choosing effective and accurate formalin detection technology.
Co-Authors Chamidah, Ninik Dimyati, Dadang Imam Tazi kusairi kusairi, kusairi Muthmainnah Muthmainnah Nur'aeni, Nur'aeni