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All Journal TRANSIENT: Jurnal Ilmiah Teknik Elektro Eksergi: Chemical Engineering Journal ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika JURNAL NASIONAL TEKNIK ELEKTRO JOIV : International Journal on Informatics Visualization Jurnal Pemberdayaan: Publikasi Hasil Pengabdian Kepada Masyarakat Buletin Ilmiah Sarjana Teknik Elektro MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Jurnal Peduli Masyarakat Indonesia Berdaya
Sabila, Liya Yusrina
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PERANCANGAN ANTENA MIKROSTRIP CIRCULAR PATCH UNTUK WIFI MENGGUNAKAN CHARACTERISTIC MODE ANALYSIS (CMA) Sabila, Liya Yusrina; Prakoso, Teguh; Sofwan, Aghus
Transient: Jurnal Ilmiah Teknik Elektro TRANSIENT, VOL. 7, NO. 1, MARET 2018
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (695.884 KB) | DOI: 10.14710/transient.7.1.13-19

Abstract

Wi-Fi (Wireless Fidelity) merupakan sebuah teknologi yang memanfaatkan peralatan elektronik untuk bertukar data secara nirkabel. Dalam sistem komunikasi wireless bagian terpenting untuk mengoptimalkan kinerjanya adalah antena. Mikrostrip adalah salah satu jenis antena yang praktis mempunyai ukuran dan dimensi yang sederhana dan mudah difabrikasi. Pada penelitian ini dibahas bagaimana desain dan analisa antena mikrostrip dengan bentuk patch sirkular dengan spesifikasi frekuensi kerja 2,400 – 2,484 GHz menggunakan substrat FR-4 dengan ketebalan 1,6 mm dan  = 4,3. Teknik pencatuan yang digunakan adalah dengan teknik microstrip line feed. Perancangan dan simulasi antena mikrostrip dilakukan menggunakan software CST Studio Suite  2016. Antena yag dirancang juga dianalisa menggunakan Characteristic Mode Analysis (CMA). Hasil yang ditampilkan berupa grafik mode-mode arus pada  modal significance. Dihasilkan sebanyak dua mode yang berhimpit untuk desain patch A pada frekuensi 3081 MHz dan terjadi perubahan untuk desain patch B, dimana kedua mode berpisah dan bergeser, mode 1 bergeser ke frekuensi 2406 MHz sedangkan mode 2 bergeser ke frekuensi 1889 MHz. Dari antena mikrostrip yang telah difabrikasi dilakukan pengukuran beberapa nilai parameter yaitu, S11 sebesar -21,13 dB, VSWR 1:1,19, rentang frekuensi 2,37 – 2,54 GHz, pola radiasi directional dan gain sebesar 2,15 dBi.
Pengaruh Jenis Pengemban Pada Degradasi Limbah Detergen dengan Menggunakan Reaksi Fenton Heterogen Amelia, Shinta; Sabila, Liya Yusrina; W, Mila Utami; Sriyana, Ida; Anjarwati, Dita Rahmika
Eksergi Vol 21, No 3 (2024)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v21i3.12613

Abstract

Air adalah sumber kehidupan, namun menjadi masalah ketika kualitas dan kuantitasnya tidak sesuai standar. Salah satu penyebab pencemaran air yang perlu diperhatikan adalah limbah detergen yang mengandung Alkyl Benzene Sulfonate (ABS) dan Linear Alkyl Benzene Sulfonate (LAS). Penelitian ini bertujuan untuk mengetahui pengaruh variasi jenis pengemban katalis dalam proses degradasi ABS dan LAS menggunakan reaksi Fenton heterogen. Metode ini dipilih karena menggabungkan proses adsorpsi dan reaksi kimia, sehingga lebih efektif dalam mendegradasi limbah detergen. Prosedur penelitian diawali dengan persiapan katalis melalui pencampuran larutan besi nitrat ke dalam pengemban, lalu dilakukan uji degradasi katalis dengan pengambilan sampel secara berkala. Sampel dianalisis menggunakan metode MBAS SNI 06-6989.51-2005. Hasil penelitian menunjukkan, setelah 180 menit, degradasi ABS dengan karbon aktif mencapai 90,2% dan dengan zeolit 75,5%, sementara degradasi LAS dengan karbon aktif 42,15% dan dengan zeolit 30,85%. Karbon aktif lebih efektif dibandingkan zeolit dalam degradasi ABS dan LAS.
THE DESIGN OF DETERGENT WASTE PROCESSING USING INTERNET OF THINGS Ma'arief, Shandy Auliya; Sabila, Liya Yusrina; Amelia, Shinta
Transient: Jurnal Ilmiah Teknik Elektro TRANSIENT, VOL. 13, NO.2, JUNI 2024
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/transient.v13i2.58-64

Abstract

Detergent is a product that is widely used by people to clean clothes. Detergent production contains synthetic dyes which can contain heavy metals such as Cadmium (Cd) and Cuprum (Cu). The remainder of detergent use is usually thrown into the environment, in this case we call it detergent waste. Detergent waste must be managed and processed in an environmentally friendly manner and meet environmental quality standards before being discharged into the environment. The heterogeneous Fenton method will be chosen to solve this problem. Another challenge that needs to be resolved is time inefficiency in processing detergent waste, where users have to carry out processing manually so they spend time just waiting for the waste processing process. In this research, a tool was created to overcome the problem of batik waste processing using an Internet of Things-based waste processing reactor using color sensors. This research concludes that a detergent waste processing reactor using an IoT-based color sensor can carry out the detergent waste degradation process. The reading of the color sensor value is carried out based on the frequency value on a scale of 20%. Determining the RGB value mapping on the color sensor is the result of 20% scaling of the frequency read by the sensor with mapping values R = 35 Hz, G = 53 Hz, and B = 40 Hz as the lower limit and R = 159 Hz, G = 174 Hz, and B = 211 Hz as the upper limit of the frequency read.
Training on the Use of Batik Waste Processing Equipment to Enhance Productivity for the Wijirejo Pandak Bantul Batik Group Amelia, Shinta; Evitasari, Rachma Tia; Rosyida, Miftahurrahma; Sabila, Liya Yusrina; Sabilihaq, Roby; Lestari, Betty Novia; Aini, Siti Nur
Indonesia Berdaya Vol 5, No 4 (2024)
Publisher : UKInstitute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47679/ib.2024906

Abstract

The batik industry is one that continues to develop over time. One of the ongoing concerns is the waste generated by the batik industry, particularly the dye content in batik dyes. Reactive dyes, if not processed properly, can have a very negative impact on the environment. They can pollute water sources, harm the surrounding environment, and even kill aquatic biota. Currently, liquid batik waste is stored in holding tanks and allowed to seep into the ground without further processing. Given the environmental impact of batik dyes, efforts must be made to minimize these effects before the waste is discharged into water bodies. A batik waste processing method currently under development is the Heterogeneous Fenton method. This method can degrade batik waste into compounds that are less harmful to the environment. The implementation of this service involves socialization and introduction of the program to the service partners, as well as training. This includes technology introduction, tool usage, and the transfer of scientific and technological knowledge to the service partners.
Analysis of Radiation Structure of Circular Microstrip Antenna using Characteristic Mode Analysis for ISM Band SABILA, LIYA YUSRINA; AMRI, MUHAMMAD MIFTAHUL; YUDHANA, ANTON; AKRIMA, ASRA; PRATAMA, IGO PUTRA
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 11, No 1: Published January 2023
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v11i1.100

Abstract

ABSTRAKMakalah ini bertujuan untuk melihat karakteristik struktur radiasi menggunakan Analisis Mode Karakteristik pada antena sirkular array. Kontribusi utama dari pekerjaan ini adalah menganalisis penyebab masalah antena yang tidak sesuai dengan impedansinya pada frekuensi 2,4 GHz melalui mode distribusi arus pada patch atau radiasi. Pencocokan impedansi dapat dicapai dengan menetapkan slot ke dua patch yang tersusun dan memberikan efek peningkatan bandwidth dan gain. Untuk validasi hasil performansi antena dapat dilihat dari mode aktif pada frekuensi yang sesuai. Ditemukan bahwa antena yang diusulkan memiliki dua mode aktif pada frekuensi 2,4 GHz. Ditemukan bahwa antena yang digunakan cukup akurat. Hal ini dibuktikan dengan nilai S11 sebesar -19,606 dB dan gain sebesar 3,45 pada frekuensi 2,45 GHz.Kata kunci: antena, mikrostrip, characteristic mode analysis, ISM Band, 2.4 GHz ABSTRACTThis paper aims to see the characteristics of the radiation structure using Characteristic Mode Analysis on circular array antennas. The main contribution of this work is to analyze the causes of the problem of the antenna not matching its impedance at the 2.4 GHz frequency through the current distribution modes on the patch or radiation. Matching impedance can be achieved by assigning slots to the two arrayed patches and increasing bandwidth and gain. It can be seen from the active modes at the appropriate frequency to validate the results of antenna performance. The proposed antenna has two active modes at a frequency of 2.4 GHz. It is found that the proposed antenna is entirely accurate. It is proven by the S11 value of -19.606 dB and the gain of 3.45 at a frequency of 2.45 GHz.Keywords: antenna, microstrip, characteristic mode analysis, ISM Band, 2.4 GHz
Optimization of lemongrass cultivation into essential oil in Tunggularum, Wonokerto Hidayah, Nurul; Fathurrahman , Haris Imam Karim; Fitriani , Aprilia; Sabila, Liya Yusrina
Jurnal Pemberdayaan: Publikasi Hasil Pengabdian Kepada Masyarakat Vol. 8 No. 3 (2024)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/jpm.v8i3.11601

Abstract

The empowerment of the community in Tunggularum, Wonokerto, aims to optimize lemongrass (Cymbopogon citratus) cultivation into essential oil products through community-based training and practical skills development. Lemongrass is widely cultivated in the area but is underutilized due to limited knowledge of its potential economic value, particularly in essential oil production. This community service project focused on addressing this gap through two primary activities: a socialization session on the essential oil distillation process and hands-on training in the operation of distillation equipment. The project involved 20–25 local participants, predominantly women, who attended both the theoretical and practical sessions. The results showed significant improvements in the participants' knowledge and skills. Over 70% of participants reported feeling more capable of managing the local lemongrass resources and demonstrated an enhanced understanding of the distillation process. The training also fostered new skills in operating distillation equipment, which further encouraged the participants to explore the business potential of lemongrass essential oil production.
Training for the Randu Alas Batik Group in Processing Batik Waste by Internet of Things Sabila, Liya Yusrina; Amelia, Shinta; Subrata, Arsyad Cahya; Ma'arief, Sandhy Auliya; Fadhilla, Irvanda Cheza Noor; Yasa, Fakhra Kurnia
Indonesia Berdaya Vol 5, No 4 (2024)
Publisher : UKInstitute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47679/ib.2024895

Abstract

The Industrial Revolution 4.0 era has encouraged the integration of Internet of Things (IoT) technology in various sectors, including industrial waste management. This article discusses the implementation of IoT technology for processing batik liquid waste in the Randu Alas Batik Community Group, Mrisi, Tirtonirmolo, Bantul Regency, Yogyakarta. Batik liquid waste, which comes from the processing and dyeing process, contains dangerous chemicals that can increase chemical oxygen demand (COD) values and cause water pollution. This community service activity is carried out through outreach, training, and practice in using IoT-based waste processing equipment, which aims to increase community knowledge and skills in managing waste effectively and sustainably. The evaluation results show a significant increase in understanding and application of IoT, reflected in the pretest and post-test results. The conclusion of this activity shows that IoT technology effectively improves the quality of batik waste management and has great potential to be widely applied to maintain environmental sustainability.
Optimalisasi Praktik Pertanian Kakao melalui Pengomposan Kulit Kakao dan Limbah Pertanian untuk Pertanian Berkelanjutan Hanum, Farrah Fadhillah; Sabila, Liya Yusrina; Khairi, Amalya Nurul; Febriani, Annisa Vada; Wardhana, Budi Setya
Jurnal Peduli Masyarakat Vol 6 No 4 (2024): Jurnal Peduli Masyarakat: Desember 2024
Publisher : Global Health Science Group

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37287/jpm.v6i4.4385

Abstract

Program pengabdian ini bertujuan untuk meningkatkan pemanfaatan limbah pertanian, khususnya kulit kakao, menjadi pupuk kompos yang dapat digunakan untuk meningkatkan kesuburan tanah dan mengurangi ketergantungan pada pupuk kimia. Kegiatan ini dilaksanakan di Kelompok Wanita Tani (KWT) Berkah Wanita, Desa Gedangrejo, Gunung Kidul, dengan melibatkan 35 anggota kelompok. Metode yang digunakan meliputi sosialisasi dan pelatihan praktis, dimulai dengan pretest untuk mengukur pengetahuan awal peserta, diikuti oleh penyampaian materi tentang pentingnya pengolahan limbah organik. Pada sesi pelatihan, peserta mempraktikkan proses pembuatan kompos, termasuk pencacahan limbah pertanian dan penggunaan bioaktivator untuk mempercepat dekomposisi. Hasil dari kegiatan ini menunjukkan peningkatan pengetahuan peserta, dengan 65% dari mereka yang awalnya mengetahui manfaat pengolahan limbah dengan tingkat cukup (25-50%), meningkat menjadi 52,63% yang memiliki pemahaman lebih mendalam atau tingkatan sangat (75-100%) setelah pelatihan. Selain itu, metode sederhana seperti pencacahan limbah dan penggunaan bioaktivator dapat dengan mudah diadopsi oleh petani, sehingga mengurangi limbah organik yang terbuang dan menghasilkan pupuk kompos yang siap digunakan. Program ini diharapkan dapat diterapkan secara berkelanjutan di tingkat komunitas.
IoT-Based Monitoring System for Temperature and pH Control in Cocoa Fermentation Sabila, Liya Yusrina; Dwiyono, Linggar Rahmat; Hakim, Agus Rahman; Karuana, Abi Nazli; Hakika, Dhias Cahya
MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Vol 7 No 1 (2025): Motivection : Journal of Mechanical, Electrical and Industrial Engineering
Publisher : Indonesian Mechanical Electrical and Industrial Research Society (IMEIRS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46574/motivection.v7i1.381

Abstract

Cocoa fermentation plays a crucial role in cocoa bean production, as it directly influences the taste, aroma, and texture of the final product. Temperature and pH significantly impact microbial activity during fermentation, making their control essential for achieving optimal and consistent results. A promising solution is the implementation of an IoT-based system for temperature regulation and pH monitoring, allowing for real-time data tracking throughout the fermentation process. This study developed a cocoa fermentation box integrated with an IoT system, utilizing a DHT22 temperature sensor and a 4502C pH sensor for precise monitoring. The system enables real-time data access and remote control, improving efficiency and quality while transforming conventional manual observation methods into a standardized, data-driven approach. IoT technology facilitates rapid condition adjustments and predictive analysis, minimizing human error and reducing the risk of fermentation inconsistencies. The experimental results demonstrated high sensor accuracy, with the IoT system successfully enhancing efficiency, control, and cocoa bean quality. In the 1 kg cocoa test, temperatures ranged from 28℃ to 35℃, with pH values between 4.0 and 5.3. In the 10 kg experiment, temperatures on the second day ranged from 28℃ to 33℃ with pH values between 4.3 and 5.9, while on the third day, temperatures ranged from 28℃ to 32℃, with pH values stabilizing between 4.0 and 5.3.
Design of Oxygen and Carbon Dioxide Monitoring System in Cocoa Fermentation with Internet of Things and Automatic Stirring System Sabila, Liya Yusrina; Linggar Rahmat Dwiyono; Agus Rahman Hakim; Abi Nazli Karuana; Dhias Cahya Hakika; Farrah Fadhillah Hanum
JURNAL NASIONAL TEKNIK ELEKTRO Vol 14, No 2: July 2025
Publisher : Jurusan Teknik Elektro Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jnte.v14n2.1245.2025

Abstract

In some areas in Indonesia, more traditional cocoa farmers have yet to carry out special monitoring of O2 and CO2 levels during fermentation because the practices and technologies used by cocoa farmers can vary significantly in different regions and levels of development. The right amount and level of O2 and CO2  can regulate the activity of microorganisms and affect the overall fermentation process. The fermentation box is made using a wooden board measuring 50x50 cm and is equipped with a stirring blade inside. The sensors used are the Gravity O2 I2C Sensor and the CO2 Sensor MG-118, with a high torque D.C. motor as the stirring blade drive. The results of monitoring and controlling the stirrer are carried out using the Blynk IoT platform or directly on the fermentation box. The tests carried out include testing on an empty fermentation box and testing on the fermentation process of 1kg and 6kg cocoa. After carrying out the testing process, the sensors and IoT systems created can work optimally. The sensor test results in the cocoa fermentation process show a change in CO2 concentration, initially 400 ppm, increasing to a maximum of 1600 ppm. Meanwhile, the O2 concentration remains stable at 20-21% vol, and the stirrer can work optimally. The D.C. motor-driven stirrer can operate effectively with a stirrer response time of 2 seconds and a stirring efficiency of 95% at both fermentation loads (1kg and 6kg). The monitoring system integrated with the Blynk IoT platform shows a gas measurement accuracy rate of 98%, making it easier for cocoa farmers to monitor and control the fermentation process more accurately. The effectiveness of this system can improve the quality of cocoa fermentation results by optimizing fermentation conditions through the right O2 and CO2 levels.
Co-Authors Abi Nazli Karuana Aghus Sofwan Agus Rahman Hakim AKRIMA, ASRA Amelia, Shinta Anjarwati, Dita Rahmika Anton Yudhana Dhias Cahya Hakika Dhias Cahya Hakika Dwiyono, Linggar Rahmat Evitasari, Rachma Tia Fadhilla, Irvanda Cheza Noor Farrah Fadhillah Hanum Fathurrahman , Haris Imam Karim Febriani, Annisa Vada Fitriani , Aprilia Hakim, Agus Rahman Hanum, Farrah Fadhillah Karuana, Abi Nazli Khairi, Amalya Nurul Kurnia, Herri Lestari, Betty Novia Linggar Rahmat Dwiyono Lisna Zahrotun Ma'arief, Sandhy Auliya Ma'arief, Shandy Auliya Muhammad Miftahul Amri Munawar Agus Riyadi Nurul Hidayah PRATAMA, IGO PUTRA Rosyida, Miftahurrahma Sabilihaq, Roby Siti Nur Aini, Siti Nur Sriyana, Ida Suandi As, Banu Harli Trimulya Subrata, Arsyad Cahya Teguh Prakoso Utaminingsih Linarti, Utaminingsih W, Mila Utami Wardhana, Budi Setya Yasa, Fakhra Kurnia