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All Journal Jurnal Rekayasa Sipil dan Desain Jurnal Spektra JURNAL ILMIAH PENDIDIKAN FISIKA AL BIRUNI JIPF (Jurnal Ilmu Pendidikan Fisika) Jurnal Penelitian Pendidikan IPA (JPPIPA) Journal of Economic, Bussines and Accounting (COSTING) Journal of Engineering and Scientific Research (JESR) Al-Wardah: Jurnal Kajian Perempuan, Gender dan Agama Indonesian Journal of Education and Mathematical Science International Journal of STEM Education for Sustainability Jurnal Profesi Insinyur Universitas Lampung Journal of Applied Science, Engineering and Technology (J. ASET) Newton-Maxwell Journal of Physics Jurnal Sosial dan Sains Mestaka: Jurnal Pengabdian Kepada Masyarakat Jurnal Penelitian dan Pengabdian Masyarakat Social Impact Journal Nemui Nyimah
Siti Nurul Khotimah
Institut Teknologi Bandung
Religion Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Other

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Understanding the Effect of Fruits Maturity Level on Its Effectiveness as a Dielectric for Parallel Plate Capacitors for Senior High School Student Rosanti, Yerika Puspa; Fahra, Raden Manzilah Mubarokah; Khotimah, Siti Nurul
International Journal of STEM Education for Sustainability Vol 5, No 1 (2025)
Publisher : Gemilang Maju Publikasi Ilmiah (GMPI) 

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53889/ijses.v5i1.444

Abstract

Indonesia is an agrarian country that produces fruits in abundant quantities and in various variations. Fruits contain diverse contents, one of which can be utilized as a dielectric capacitor. This research is conducted to provide senior high school students with an understanding of the influence of dielectrics from several fruits on capacitance. This experiment analyzed the maturity level of fruits and their effectiveness as dielectric capacitors for parallel plate capacitors. Due to the maturity level of fruits being composed of many variables, this study is focused on differences in water content, sugar concentration, and acidity level. Through laboratory experiments, researchers examined these factors in guava, papaya, pear, mango, and apple fruits. The capacitance value of parallel plates is measured using an LCR meter, and it is found that the capacitance of parallel plates with air dielectric increases significantly when infiltrated with fruit dielectric. Water content has a significant influence. The capacitance value is also high in fruits with high water content and vice versa. Meanwhile, the influence of sugar concentration is less significant in this study, only noticeable in papaya fruits. However, this is supported by the fruit's acidity level as seen from its pH value. Fruits with high pH values also have high capacitance. Experiments found that as fruits ripen, their water content, sugar concentration, and pH value tend to increase. This causes mature fruits to be more effective when used as dielectric capacitors.
Implementation of Problem Based Learning (PBL) Learning Model to Improve Mathematical Critical Thinking Skills and Learning Motivation of Grade 5 Students at UPT SD Negeri Kutorejo 3 Tuban Khotimah, Siti Nurul; Wulandari, Tabitha Sri Hartati
Indonesian Journal of Education and Mathematical Science Vol 6, No 2 (2025)
Publisher : Universitas Muhammadiyah Sumatera Utara (UMSU)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/ijems.v6i2.24169

Abstract

This study aims to improve the mathematical critical thinking skills and learning motivation of 5th grade students of UPT SDN Kutorejo 3 Tuban through the application of the Problem Based Learning (PBL) learning model with material comparing and sorting fractions. This study uses a Classroom Action Research (CAR) approach consisting of two cycles. The subject of the study was grade 5 students with a total of 29 students. The instruments used in this study include tests to assess mathematical critical thinking skills, learning motivation questionnaires, and observation sheets of the learning process. The results showed a significant increase in students' mathematical critical thinking skills and learning motivation after the application of the PBL model. In the first cycle, 69% of students achieved completeness in the critical thinking test, while 31% of students did not complete it. Based on the results of the questionnaire, 40% of students showed low motivation to learn. In the second cycle, the percentage of completeness increased to 75.8%, with 22 students achieving completeness. In addition, students' motivation to learn also increased, with 87.84% of students showing higher motivation compared to the first cycle. Thus, it can be concluded that the application of the PBL model is able to encourage the improvement of mathematical critical thinking skills and learning motivation of 5th grade students at UPT SDN Kutorejo 3 Tuban.
Potential of Fecal Sludge Briquette as Biofuel: A Review Khotimah, Siti Nurul
Journal of Applied Science, Engineering and Technology Vol. 5 No. 1 (2025): June 2025
Publisher : INSTEP Network

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47355/jaset.v5i1.75

Abstract

Fecal sludge from fecal wastewater treatment may create problem to environment and human health as Its high production number and its hazardous content. The high volume of fecal sludge production not only reflects the scale of sanitation needs but also signifies a substantial opportunity for renewable energy generation by transforming the fecal sludge to briquettes. This article is a critical review to evaluate the potential of fecal sludge, especially about its characteristics as a raw material, the method to create the briquettes, the briquette composition and finally its performance regarding the fecal sludge composition. Interestingly, even though fecal sludge is hazardous as the high pathogen level such as bacteria, worm and its egg, they will die after drying and carbonizing process. Hence, it will be safe to utilize the fecal sludge briquettes for human need. Comparing the calorific value of fecal sludge briquettes and coal (fossil fuel which has high energy value), the fecal sludge’s energy is about 3 times lower. This mean, if it is expected to achieve the fecal sludge briquettes’ calory equivalent to the coal, the number of fecal sludge briquettes should be multiplied 3 times.
Simulasi Numerik Distribusi Medan Magnet Aksial dan Radial pada Solenoida Berhingga Berbasis MATLAB Muddasir, Fadhil; Khotimah, Siti Nurul
Jurnal sosial dan sains Vol. 5 No. 6 (2025): Jurnal Sosial dan Sains
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/jurnalsosains.v5i6.32267

Abstract

This study aims to numerically analyze the distribution of axial and radial magnetic fields in a finite solenoid using MATLAB software. The simulation is based on classical magnetic field theory, particularly the Biot–Savart law, along with Pathak's analytical approach for modeling the radial field component. The primary focus is to understand the magnetic field behavior around a solenoid of finite length, which is commonly used in various electromagnetic applications. The simulation results reveal that the axial magnetic field remains relatively uniform within the central region of the solenoid but decreases significantly near its ends due to the fringe field effect. Meanwhile, the radial magnetic field outside the solenoid exhibits an exponential decay with increasing radial distance from the axis, consistent with the behavior of a magnetic dipole field. These findings offer preliminary validation of the theoretical models applied in the simulation while emphasizing the need for further experimental verification. This research is expected to contribute to the design, development, and optimization of experimental devices involving finite solenoids, particularly in applied physics and electromagnetic engineering contexts.
Determination of Dielectric Constants through Capacitor Measurement Using Variations in Thickness, Area, Materials, and Density Rohman, Syifa Nailufar; Khairina, Jasmine; Julaeha, Juju; Khotimah, Siti Nurul
Jurnal Ilmiah Pendidikan Fisika Al-Biruni Vol 13 No 1 (2024): 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.v13i1.16134

Abstract

In this study, the researchers focused on testing experimental media from Yeti Rusmiati to measure the dielectric constant of capacitors, with variations in thickness, surface area, material, and density. The experimental results show that the thicker the dielectric material, the smaller the capacitance value. This applies to all materials tested, namely mica, silicon, and duplex paper, with errors from largest to smallest being 24.97% duplex, 7.27% mica, and 0% silicon. Measuring the capacitance of parallel plate capacitors with variations in plate area from GRC gypsum, silicon rubber, and mica, it was found that the error from largest to smallest is mica 11.56%. In comparison, silicon rubber and GRC gypsum have an error of 0%. Measurement of capacitance by varying the dielectric material shows that the capacitance value of the capacitor is proportional to the dielectric constant of the material. Among all the 12 materials tested, the highest dielectric constant is banana leaves with a value of ? = 12.6 and the smallest flannel with a value of ? = 1.02. In contrast, the variation in density shows that the greater the density, the greater the dielectric constant, from the largest to the smallest, the variation in density of leaves steamed with fire, fresh leaves 1 x 24 hours, and dry leaves heated with the sun, respectively 67.51;22.96; 16.57. It can be concluded that Yeti Rusmiati's media can be used in measuring dielectric constant with variations in thickness, area, density, and dielectric material in learning capacitors.
Policy Implementation of Sending Problematic Students to Military Barracks: A Multi-Stakeholder Perspective Analysis in West Java Nurfazriah, Aninda; Khotimah, Siti Nurul; Makarim, Mochamad Hanif; Septiany, Putri Bella; Jamiludin, Azam
Social Impact Journal Vol. 4 No. 2 (2025): Social Impact Journal
Publisher : GoResearch - Research & Publishing House

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61391/sij.v4i1.199

Abstract

The handling of problematic students in schools has become an important issue in the world of education, especially when the policies taken cause controversy. One policy that has attracted a lot of public attention is sending troubled students to military barracks as a form of character building and discipline. This policy has sparked debate in the community because it involves approaches, educational values, and long-term impacts on the psychological development of students. This research also aims to analyze the implementation of the policy from various perspectives, including local government, school, parents, students and psychology education experts. The method used is qualitative with a case study approach. Data were collected through documentation studies and secondary interview analysis. The results showed that the policy of sending troubled students to military barracks reaped pros and cons, although it received support from several parties because it was considered to form discipline and character, many parties considered the militaristic approach was not in accordance with the principles of humanistic education and had the potential to cause psychological impacts and violations of human rights. This research concludes that in an effort to foster troubled students, the approach should pay attention to the balance between discipline and empathy, and prioritize pedagogical principles and the protection of children's rights. Therefore, a more participatory, evidence-based policy formulation is needed and involves the active role of all parties to create a fair and effective education system in dealing with deviant behavior in the school environment. Keywords: Education policy, Problem students, Military barracks, Multi-stakeholder perspective, West Java.
Performance Method of Maximum Daily Rainfall Frequency Analysis Using Correlation Agustriyanto, Dono; Zakaria, Ahmad; Khotimah, Siti Nurul
Jurnal Rekayasa Sipil dan Desain Vol. 8 No. 1 (2020): Edisi Maret 2020
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v8i1.1277

Abstract

Rainfall in Bandar Lampung has a different distribution value for each station which is calculated to carry out the annual maximum daily rain forecast required in road planning, water building and drainage. Getting rain distribution values requires a method that meets the requirements of Cs, Ck and Cv. But this study reviews methods that have a correlation value close to the value of one. In this study, a validation test was carried out in advance to normalize values> 500 mm which were then calculated through the Normal, Log Normal, Gumbel and Log Pearson III methods. Look at the correlation value of each method with a scatter diagram. Analysis of the calculation of the rain distribution method at the Sukarame rain station (PH-003) Log Normal method has a value of 0.96 which has a correlation coefficient value that is closest to the value of 1 (one) among the other methods in all rain stations. Log Normal method has the best average correlation value that is 0.85 then the Normal method has a mean correlation value of 0.74 followed by Log Pearson III method with an average correlation value of 0.35 and the mean correlation value of the Gumbel method -0.01. The correlation value obtained using the Log Normal method is seen both at Sumberejo, Sukarame and Pahoman stations. However, at the Sumur Putri station the value of the Log Pearson III correlation, with the normal log method, the data correlation value is the best because the data fluctuations are close to the value of 1 compared to other methods. Keywords: Correlation, Rainfall, Normal Method, Log Normal Method, Gumbel Method, Log Pearson III Method.
Perbandingan Analisis Data Curah Hujan yang Hilang Menggunakan Metode Normal Ratio, Inversed Square Distance, Rata-Rata Al-jabar, dan Regresi Berganda Pelawi, Rinaldi; Zakaria, Ahmad; Khotimah, Siti Nurul
Jurnal Rekayasa Sipil dan Desain Vol. 8 No. 2 (2020): Edisi Juni 2020
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v8i2.1322

Abstract

Data curah hujan bagian yang sangat penting untuk perencanaan teknik sumber daya air bisa juga digunakan untuk memprediksi kejadian hujan dimasa yang akan datang. Pencatatan data curah hujan terkadang terjadi suatu hal yang tidak diinginkan seperti terdapat kekosongan data curah hujan pada daerah tertentu, hal ini tentu sangat berdampak pada perhitungan analisis. Data hujan yang hilang bisadiprediksi dengan menggunakan metode rata-rata aljabar, inversed square distance, normal ratio dan regresi berganda.Pada penelitian ini tujuan untuk menghitung korelasi data curah hujan terukur dengan data curah hujan hasil perhitungan dengan masing-masing metode menggunakan lima stasiun. Serta menentukan membandingkan 4 metode tersebut dengan menggunakan 4 metode metode rata-rata aljabar, inversed square distance, normal ratio dan regresi berganda dengan data hujan maksimal untuk menggantikan data curah hujan yang hilang.Hasil yang dilakukan dapat diambil kesimpulan data terukur semakin dekat dengan 1 maka korelasi semakin tinggi, jika semakin dekat dengan -1 maka korelasi semakin rendah. Hal ini karena korelasi antara -1 dan 1 atau – 1 ≤ ? ≤ 1. Jadi, dari beberapa metode normal ratio, inversed square distance, rata-rata al-jabar, regresi berganda didapatkan hasil metode normal ratio dengan rata-rata korelasi setiap stasiun curah hujan senilai 0,365 yang dikategorikan korelasi cukup baik.  Kata kunci : curah hujan, metoderata-rata aljabar, metode inversed square distance, metode normal ratio, metoderata-rata regresi berganda, korelasi pearson, standar deviasi.
peningkatan kualitas air menggunakan filter mangan zeolit dan karbon aktif Jundulloh, Panglima; Winarno, Dwi Joko; Kusumastuti, Dyah Indriana; Khotimah, Siti Nurul
Jurnal Rekayasa Sipil dan Desain Vol. 9 No. 4 (2021): Edisi Desember 2021
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v9i4.2178

Abstract

  Water is a chemical compound that is very important for human life and other living things. the quantity and quality of the well as a water source must meet the physical, chemical and bacteriological requirements. Therefore, proper groundwater treatment is needed to process it into clean water that meets the requirements in terms of quality and quantity so that it is suitable for use by humans. To improve water quality, you can use methods such as filtration. In this final project, water quality improvement is carried out using manganese zeolite and activated carbon filters. The result of this research is to know the efficiency of iron (Fe), manganese (Mn) and E.coli removal using this unit. The results of laboratory tests conducted by the Research and Industrial Standardization Institute of Bandar Lampung with water samples with most parameters such as Fe and Mn have met the standards of the Regulation of the Minister of Health of the Republic of Indonesia Number 32/MENKES/PER/II/2017 concerning Clean Water Quality Requirements, but the test results with E-coli bacteria parameter is 2863 per 100 ml sample which exceeds the maximum level of 0. From this study manganese zeolite and activated carbon filters are effective in reducing TDS levels by 133 and E-Coli bacteria with results of <300 Keywords: water cleaner, zeolite manganese filter and activated carbon
Analisis Data Curah Hujan yang Hilang dengan Menggunakan Metode Normal Ratio, Inversed Square Distance, Rata-Rata Aljabar dan Linear Regression (Studi Kasus Data Curah Hujan Beberapa Stasiun Hujan Wilayah Lampung Tengah) Septiansari, Annisa Putri Dwi; Zakaria, Ahmad; Khotimah, Siti Nurul; Romdania, Yuda
Jurnal Rekayasa Sipil dan Desain Vol. 9 No. 4 (2021): Edisi Desember 2021
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v9i4.2219

Abstract

Data hujan sangat penting dan dibutuhkan dalam perhitungan teknik sipil maka kelengkapan data hujan merupakan salah satu bagian terpenting dalam kaitannya perencanaan manajemen keairan, menajemen sumber daya air, maupun perencanaan pembangunan, terlebih lagi untuk perencanaan bangunan air. Namun sering kali terjadi data pada periode perekaman pada stasiun hujan yang ada di suatu wilayah tidak lengkap. Untuk melengkapi data curah hujan yang tidak lengkap atau hilang, maka pada penelitian ini dilakukan penelitian untuk memprediksi data curah hujan dengan menggunakan metode Normal Ratio, Linear Regression, Inversed Square Distance, Rata-rata Aljabar. Dari hasil penelitian ini metode modifikasi rata-rata aljabar didapatkan sebagai metode terbaik untuk pencarian data hujan yang hilang. Terbukti dari nilai korelasi rata-rata tahunan yang paling besar, yaitu: 0,301. Nilai ini menunjukkan bahwa hubungan antara data hujan terhadap korelasi tahunan masih lemah. Hal ini disebabkan nilai korelasi masih jauh dari angka 1 (nilai maksimum)
Co-Authors Agumsari, Dini Agustriyanto, Dono Ahmad Herison Ahmad Zakaria Albana, Ikhsan Aldayanti, Ulfa Ambarwati, Yuli Amelia, Ananda ANDIKA SAPUTRA Ani, Serli Arindi Aspita Laila Aziza, Rohana Nur Azizah, Fitri Diana Lisa Dikpride Despa Dimas Praja Purwa Aji, Dimas Praja Purwa Djana, Miftahul Djausal, Gita Paramita Dwi Ernawati Dwi Joko Winarno Dyah Indriana Kusumastuti Eska Prawisudawati Ulpa Fadillah, Ihsanuddin Fahra, Raden Manzilah Mubarokah Feriska Handayani Irka, Feriska Handayani Fikri Alami Freddy Haryanto Gunawan, Andri Handayani, Nita Hari Anggit Cahyo Wibowo, Hari Anggit Cahyo Herawati Herawati Herlinawati Hibatulloh, Muhammad Hafidh Idam Arif Irwanto, Dwi Istiyanti, Lita Jamiludin, Azam John Hendri Julaeha, Juju Jundulloh, Panglima Khadafi, M Fariq Khairina, Jasmine Kusumastuti, Nining Lestari, Nita Septiani Mahendra Pratama Makarim, Mochamad Hanif Mardhotillah, Nur Anisa MARDIANA Martinus Martinus, Martinus Mayasari, Rizka Muddasir, Fadhil Muhammad Miftahul Munir Muhammad, Meizano Ardhi Mulyono Mulyono Nur Arifaini Nurfazriah, Aninda Pelawi, Rinaldi Pratama, Sra Harke Puligadda, Lohit Krishna Pranav Purwadi, Ofik Taupik Putri, Hawinda Restu Ratri, Bekti Afre Ristanti, Dina Endang Rohman, Syifa Nailufar Rosanti, Yerika Puspa Rusmiati, Fadhilah Sekimoto, Hiroshi Septiansari, Annisa Putri Dwi Septiany, Putri Bella Simparmin br Ginting Sparisoma Viridi SRI RAHAYU Su'ud, Zaki Sundjoto, Sundjoto SYAIFUL BAHRI Tabitha Sri Hartati Wulandari Trise Nurul Ain Utaminingtyas, Ika Wulandari Wahyu Eko Sulistiono Wulandari, Qanita Wulansari, Christina Yuda Romdania Yusafrida Rasyidin Yusuf, Ananda Emelia