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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 Penamas: Journal of Community Service
Sabila, Liya Yusrina
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Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Medicine & Pharmacology Nursing Public Health Social Sciences Veterinary Other

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Design of PIFA Antenna Using Systematic Tuning for Long Range Communication Sabila, Liya Yusrina; Prakoso, Teguh; Riyadi, Munawar Agus
Buletin Ilmiah Sarjana Teknik Elektro Vol. 5 No. 4 (2023): December
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/biste.v5i4.9844

Abstract

Communication with a wireless system is one of the mainstays of communication so that communication integration is achieved. In this application, of course, an antenna is needed to send information waves to the receiver. It is also hoped that the antenna can be integrated with other components into an integrated system. There are several challenges that need to be answered to make this happen. Namely, the size of the antenna is small and the shape of the antenna can adjust to the shape of the object being integrated, for example a circle or cylinder shape. The antenna chosen to realize this challenge is the Planar Inverted F Antenna (PIFA). PIFA antennas are widely used in communication devices because their shape and size can be adjusted to the dimensions of the device. The technique used to create curved shapes is a conformal technique. To streamline the antenna design steps, the system tuning method is applied when simulating the design. The results achieved use a system tuning method which can reduce the experimental steps to just 6 experimental steps. The antenna designed works in the frequency range 916.9 – 933 MHz, the resonant frequency of 925.6 MHz with S11 is -12.5 dB, bandwidth 16.1 MHz, and the radiation pattern is omnidirectional.
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 Teknik 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.
Comparison of K-Medoids Method and Analytical Hierarchy Clustering on Students' Data Grouping Zahrotun, Lisna; Linarti, Utaminingsih; Suandi As, Banu Harli Trimulya; Kurnia, Herri; Sabila, Liya Yusrina
JOIV : International Journal on Informatics Visualization Vol 7, No 2 (2023)
Publisher : Society of Visual Informatics

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/joiv.7.2.1204

Abstract

One sign of how successfully the educational process is carried out on campus in a university is the timely graduation of students. This study compares the Analytic Hierarchy Clustering (AHC) approach with the K-Medoids method, a data mining technique for categorizing student data based on school origin, region of origin, average math score, TOEFL, GPA, and length study. This study was carried out at University X, which contains a variety of architectural styles. The R department, the S department, the T department, and the U department make up one of them. K-Medoids and AHC techniques Utilize the number of clusters 2, 3, and 4 and the silhouette coefficient approach. The evaluation's findings indicate a value. Although there is a linear silhouette between the AHC and K-Medoids methods, the AHC approach (departments R: 0.88, S: 0.87, T: 0.88, and U: 0.88) has a more excellent Silhouette value than K-Medoids (department R: 0.35, department S: 0.65 number of cluster 2, department T: 0.67 number of cluster 2 and program Study U: 0,52). The results of the second approach, which includes the K-Medoids and AHC procedures, are determined by the data distribution to be clustered rather than by the quantity of data or clusters. Based on this methodology, University X can refer to the grouping outcomes for the four departments with two achievements to receive results on schedule.
Training on Environmentally Friendly Technology for Processing Tofu Waste for MSMEs in Yogyakarta Sabila, Liya Yusrina; Amelia, Shinta; Evitasari, Rachma Tia; Fadhilla, Irvanda Cheza Noor; Yasa, Fakhra Kurnia; Fatikha, Ninda Nurul
Indonesia Berdaya Vol 7, No 3 (2026)
Publisher : UKInstitute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47679/ib.20261490

Abstract

Micro, Small, and Medium Enterprises (MSMEs) producing tofu play an important role in the national economy, but most of them have not properly managed their production waste, which has the potential to cause environmental pollution. This community service activity aims to implement a simple, effective, and sustainable tofu liquid waste treatment technology, as well as to enhance the human resource capacity of MSME partners in Yogyakarta to manage waste independently. The methods used include observation, in-depth interviews, questionnaires, and the implementation of four outreach sub-activities: (1) the hazards of tofu waste content, (2) wastewater quality standards, (3) wastewater treatment methods, and (4) Internet of Things (IoT)-based waste treatment technology. The results of the activity show that more than 80% of the partners have been educated about the dangers of waste, understand the correct treatment methods, and are able to use IoT technology to monitor waste parameters in real-time via smartphones. The impact of this community service is an increase in partners' awareness of environmental responsibility and their readiness to implement sustainable waste treatment technology.
Implementasi program RALINA dalam meningkatkan minat dan partisipasi literasi masyarakat Provinsi Jawa Tengah Sabila, Liya Yusrina; Hidayati, Nurul; Rochimatun, Rochimatun; Hikmah, Annisa Nurul
Penamas: Journal of Community Service Vol. 6 No. 2 (2026): Penamas: Journal of Community Service
Publisher : Nur Science Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53088/penamas.v6i2.2927

Abstract

The RALINA Program (Rumah Literasi Nasyiatul Aisyiyah) is a flagship program of the Regional Leadership Board of Nasyiatul Aisyiyah (PWNA) Central Java aimed at improving community-based literacy. This community service study aims to describe the implementation and impact of RALINA on reading interest and community participation. The method used was descriptive quantitative and qualitative, involving 18 program managers as respondents. The results showed that RALINA had a positive impact on reading interest (94.4% of respondents stated it had an impact/very impactful) and was effective in reaching various age groups (94.4% stated effective/very effective), especially children. Public enthusiasm for borrowing services and read-aloud programs was high. Active community participation in independently supporting the program also began to develop (88.8% participated/very participated). However, the frequency of flagship programs and regular visitor participation varied and was not yet optimal due to limited facilities and management consistency. The RALINA program has succeeded in fostering a community-based literacy ecosystem and has the potential to be developed into an inclusive and sustainable literacy center.
Strengthening The Capacity of Tunggularum Hamlet Community, In Optimizing the Lemongrass Plants into Essential Oil Products Fitriani, Aprilia; Hidayah, Nurul; Sabila, Liya Yusrina; Fathurrahman, Haris Imam Karim
Indonesia Berdaya Vol 7, No 3 (2026)
Publisher : UKInstitute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47679/ib.20261501

Abstract

Tunggularum Hamlet, Wonokerto Village, Sleman Regency, has considerable potential in lemongrass cultivation, but its utilization remains limited to traditional uses such as seasoning and herbal drinks. This community service program aimed to strengthen community capacity in optimizing lemongrass into value-added essential oil products through socialization, training, and the provision of distillation equipment. The activities included discussions with partners, socialization on lemongrass essential oil processing and packaging, practical distillation training, and evaluation through questionnaires. The program involved lecturers, students, and approximately 20–25 community participants, predominantly women farmers and housewives. The results showed that the program positively improved participants’ knowledge, management skills, economic independence, and mindset regarding the business potential of lemongrass essential oil. Most participants reported sufficient knowledge improvement, slight increases in management capability and economic independence, as well as positive changes in their entrepreneurial mindset. In addition, participants highly appreciated the support provided by the community service team during the program. Overall, the program successfully enhanced community awareness and initial capacity in developing lemongrass essential oil businesses, although further mentoring and practical assistance are still needed to achieve sustainable economic impacts and stronger entrepreneurial readiness.
Co-Authors Abi Nazli Karuana Aghus Sofwan Agus Rahman Hakim AKRIMA, ASRA Amelia, Shinta Anjarwati, Dita Rahmika Anton Yudhana Aprilia Fitriani Dhias Cahya Hakika Dhias Cahya Hakika Dwiyono, Linggar Rahmat Evitasari, Rachma Tia Fadhilla, Irvanda Cheza Noor Farrah Fadhillah Hanum Fathurrahman , Haris Imam Karim Fathurrahman, Haris Imam Karim Fatikha, Ninda Nurul Febriani, Annisa Vada Fitriani , Aprilia Hakim, Agus Rahman Hanum, Farrah Fadhillah Hikmah, Annisa Nurul 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 NURUL HIDAYAH Nurul Hidayati PRATAMA, IGO PUTRA Rochimatun, Rochimatun 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