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All Journal Rotasi Civil Engineering Journal Mekanika: Majalah Ilmiah Mekanika SMART SPORT SEMAR Jurnal Pengabdian kepada Masyarakat Nusantara
Indri Yaningsih
Jurusan Teknik Mesin, Fakultas Teknik, Universitas Sebelas Maret
Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Environmental Science Languange, Linguistic, Communication & Media Mechanical Engineering Social Sciences Other

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STUDI EKSPERIMENTAL PENINGKATAN PERPINDAHAN PANAS ALIRAN TURBULEN PADA PENUKAR KALOR PIPA KONSENTRIK DENGAN PERFORATED TWISTED TAPE INSERT WITH PARALLEL WINGS Yaningsih, Indri; Istanto, Tri; Juwana, Wibawa Endra
ROTASI Vol 17, No 3 (2015): VOLUME 17, NOMOR 3, JULI 2015
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (463.21 KB) | DOI: 10.14710/rotasi.17.3.120-129

Abstract

Heat transfer, flow friction and thermal performance factor characteristics in a concentric pipe heat exchanger fitted perforated twisted tape insert with parallel wings (PTPW), using water as working fluid are investigated experimentally. The design of PTPW involves the following concepts: (1) wings induce an extra turbulence near tube wall and thus efficiently disrupt a thermal boundary layer (2) holes existing along a core tube, diminish pressure loss within the tube. The experiments are conducted using the PTPW with the three wing depth ratio (w/W = 0.16, 0.24 and 0.32) and constant the hole diameter ratio (d/W) of 0.24 over a Reynolds number range of 5800–18,500. A typical twisted tape insert (TT) was also tested for a comparison. The results show that both mean Nusselt number and mean friction factor associated by all twisted tape are consistently higher than those without twisted tape (plain tube). It is also found that Nusselt number, friction factor and thermal performance factor increase with increasing wing depth ratio. Over the range considered, Nusselt number and friction factor in a concentric pipe heat exchanger with the PTPW are, respectively, 1.14–1.42 and 1.12–1.40 times of those in the tube with typical twisted tape (TT).
Glow-Wire Analysis of Polypropylene Blends for Mechanical and Marine Engineering Applications Firdaus, Himma; Supono, Ihsan; Pratama, Anandito Adam; Istanto, Iwan; Prabowo, Aditya Rio; Kusnandar, Nanang; Kasiyanto, Iput; Wijaya, Rahman; Lailiyah, Qudsiyyatul; Budiana, Eko Prasetya; Yaningsih, Indri; Akbar, Hammar Ilham; Imanullah, Fahmi
Civil Engineering Journal Vol. 11 No. 7 (2025): July
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2025-011-07-018

Abstract

Polymer materials are widely used due to their versatility; however, their vulnerability to fire is a significant concern, especially under electrical influences on engineered mechanical designs and marine structure applications. This study examines the fire resistance of a polypropylene (PP) blend using Glow-Wire Flammability Index (GWFI) and Glow-Wire Ignition Temperature (GWIT) tests. While previous research typically relies on flame-retardants to address flammability, this work proposes using a simple 1:1 weight ratio blend of two distinct PP types. This specific PP blend was selected to provide balanced material properties and improved processing consistency. The results from glow-wire tests were compared with previous findings to evaluate flammability performance. Our findings reveal that although the PP blend offers enhanced fire resistance compared to neat PP, it remains inferior to PP-containing flame-retardant additives. The outcomes suggest that this blended PP may be suitable for applications where mechanical properties, cost-effectiveness, and recyclability precede fire resistance, such as engineered automotive interiors, mechanical design of marine transportation, and low-risk electrical components in engineering infrastructure. This initial research contributes valuable insights into the fire behavior of PP blends. Moreover, it establishes a foundation for future investigations into polymer fire resistance, encouraging additional glow-wire testing on other polymer systems.
Peningkatan Prestasi Non-Akademik Siswa MAN 1 Surakarta melalui Pelatihan Kompetisi Robotika Unmanned Surface Vehicle Utomo, Fahri Setyo; Prabowo, Aditya Rio; Pranata, Aria; Istanto, Iwan; Wijaya, Rahman; Yaningsih, Indri; Susilo, Didik Djoko
Jurnal Pengabdian kepada Masyarakat Nusantara Vol. 6 No. 4 (2025): Edisi Oktober - Desember
Publisher : Lembaga Dongan Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55338/jpkmn.v6i4.6623

Abstract

Robotika merupakan bidang ilmu yang menggabungkan teknik, komputer, dan elektronika untuk menghasilkan mesin cerdas yang mendukung efisiensi kerja manusia. Madrasah Aliyah Negeri (MAN) 1 Surakarta telah menerapkan pembelajaran robotika melalui kelas tutorial, namun keterbatasan penguasaan dasar desain 3D, perancangan PCB, dan pemrograman masih menjadi kendala dalam pengembangan inovasi serta persiapan kompetisi. Tujuan program Pengabdian kepada Masyarakat ini adalah meningkatkan kompetensi siswa dalam bidang Unmanned Surface Vehicle (USV) melalui pelatihan desain 3D, perancangan sirkuit PCB, serta pemrograman berbasis Python. Metode kegiatan dilakukan dalam lima pertemuan yang meliputi sosialisasi, pelatihan mekanik, perakitan PCB, dan object detection berbasis machine learning. Data dikumpulkan melalui observasi, pre-test dan post-test, serta evaluasi praktik. Hasil menunjukkan peningkatan signifikan pemahaman siswa pada bidang desain 3D (52% menjadi 84%), elektronika dan PCB (47% menjadi 79%), serta pemrograman (49% menjadi 81%). Simpulan dari kegiatan ini adalah pelatihan ini memperkuat keterampilan teknis siswa dan mempersiapkan mereka menghadapi kompetisi robotika di tingkat nasional maupun internasional, serta memberikan model pembelajaran berbasis praktik yang dapat diadaptasi pada pendidikan menengah untuk mendukung inovasi teknologi.
Adsorption Characteristics of Silica Gel-Water Pairs in Personal Protection Equipment Hanif, Shazia; Adiputra, Suryadijaya; Yaningsih, Indri; Budiana, Eko Prasetya
Mekanika: Majalah Ilmiah Mekanika Vol 22, No 2 (2023): MEKANIKA: Majalah Ilmiah Mekanika
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/mekanika.v22i2.71250

Abstract

This study aims to determine the characteristics of silica gel RD to water vapor in terms of adsorption capacity and rate. A layer modeling approach was employed to simulate the Personal Protective Equipment (PPE), which comprised four distinct layers: the surrounding environment air, the fabric layer, the RD-type silica gel layer, and the air gap separating the silica gel from the skin surface. The simulation encompassed environmental conditions set at 27 ℃, while the human body's temperature was maintained at 35 ℃. This study uses a simulation method using Guggenheim–Anderson de Boer (GAB) modeling calculations to determine isothermal characteristics and Linear Driving Force (LDF) modeling to determine kinetic characteristics with an adsorbent temperature of 26.84 ℃. The simulation results show that the isothermal characteristics of silica gel RD at a relative humidity of 60% or a relative pressure of 0.6 have an absorption capacity of 0.38 kg/kg. Moreover, the kinetic characteristics of silica gel RD have an absorption rate of 0.38 kg/kg of water vapor with a time of 980 s until a significant reduction in the absorption value occurs
Desain Dan Pembuatan Alat Bantu Catur Elektronik Untuk Tunanetra Kristiawan, Budi; -, Ubaidillah; Doewes, Rumi Iqbal; Wijayanta, Agung Tri; Yaningsih, Indri; Budiana, Eko Prasetya; Himawanto, Dwi Aries; Hadi, Syamsul; Utomo, Dimas Wahyu
Smart Sport Vol 21, No 1 (2022): Jurnal Smart Sport
Publisher : Smart Sport

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/smsp.v21i1.69752

Abstract

Cabang olahraga catur tunanetra adalah salah satu cabang olahraga kebanggaan bangsa Indonesia yang sudah mampu mengharumkan nama besar Indonesia. Pada Asian Paragames 2018, cabang olahraga ini berhasil membawa pulang mendali emas terbanyak jika dibandingkan dengan cabang olah raga lain. Dari 37 mendali emas yang berhasil direbut oleh Indonesia, 11 diantaranya adalah sumbangan dari cabang olahraga catur tunanetra. Prestasi tersebut menjadikan Indonesia menduduki posisi ke-5 berdasarkan perolehan mendali dari 33 negara yang berpartisipasi pada Asian Paragames 2018. Sudah selayaknya prestasi para atlet catur tunanetra ini harus kita pertahankan dan kita tingkatkan. Untuk meningkatkan kwalitas atlet catur tunanetra bangsa Indonesia ini, prasarana yang memadahi saja tidak cukup untuk mengakomodir kebutuhan latihan. Pendampingan atlet saat melakukan latihan juga sangat dibutuhkan untuk meningkatkat kwalitas atlet. Hal tersebut dikarenakan ada beberapa peraturan pertandingan catur yang masih memerlukan bantuan orang yang bias melihat, seperti pengawasan waktu, pemberitahuan sisa waktu untuk melangkah dan sisa waktu pertandingan sampai berakhir. Akantetapi jumlah relawan pendamping yang tidak mencukupi menjadi masalah tersendiri pada kebutuhan latihan atlet catur tunanetra Indonesia. Oleh karena itulah, pada proposal ini, kami mengajukan rancang bangun catur cerdas yang bisa memudahkan dan memberitahukan atlet sisa waktu pertandingan catur sebagai pengganti fungsi relawan pendamping.  Kata Kunci: Catur, Catur tunanetra, Alat Bantu Olahraga Catur
Implementation of Solar-Powered Water Purification Technology to Enhance Quality of Life in Rural Areas Suyitno, Suyitno; Arifin, Zainal; Tjahyana, Dominicus Danardono Dwi Prija; Juwana, Wibawa Endra; Rachmanto, Rendy Adhi; Yaningsih, Indri
SEMAR (Jurnal Ilmu Pengetahuan, Teknologi, dan Seni bagi Masyarakat) Vol 13, No 2 (2024): November
Publisher : LPPM UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/semar.v13i2.90334

Abstract

This study presents the development and implementation of a solar-powered reverse osmosis (RO) water purification system at Pondok Pesantren Tijarotul Qur’aniyah, Sub-district of Bulu, District of Sukoharjo, Indonesia. The project aimed to provide a sustainable solution to the urgent need for clean drinking water in the community. The implementation process was divided into four main phases: comprehensive survey and needs analysis, prototype development and testing, system implementation, and long-term monitoring and evaluation. The initial survey identified significant issues with water quality and accessibility, leading to the design of a tailored RO system powered by solar energy. The prototype was rigorously tested and adjusted based on user feedback to ensure it met community requirements. The system was implemented on a small scale, involving the construction of necessary infrastructure and integration of solar panels for reliable power. Post-implementation water quality tests showed substantial improvements in key parameters. Results included a pH level of 7.20, hardness (CaCO₃) at 252.87 mg/L, total dissolved solids (TDS) at 0.023 mg/L, and iron (Fe) at 0.2639 mg/L. Chlorine and chromium levels were 0.00 mg/L, manganese (Mn) was 0.1001 mg/L, ammonia (NH₃) was 1.14 mg/L, and sulfate (SO₄) was 11.26 mg/L. All parameters met the quality standards set by the Indonesian Ministry of Health and Government Regulation on Water Quality Management. Continuous monitoring and educational programs were incorporated to ensure local engagement and long-term sustainability. This study demonstrates that the solar-powered RO system effectively meets the community’s need for clean water and offers a scalable model for similar regions, highlighting the potential of combining renewable energy with advanced water purification technologies. Keywords: Water Purification, Reverse Osmosis, Solar Energy, Water Quality, Sustainability
Wahana Ayun Tangan sebagai Sarana Interaksi Anak dengan Dunia Luar di Taman Mekarsari, Boyolali Kristiawan, Budi; Wijayanta, Agung Tri; Hadi, Syamsul; Yaningsih, Indri; Himawanto, Dwi Aries; Budiana, Eko Prasetya; Ubaidillah, Ubaidillah; Arifin, Zainal; Alfaiz, Noval Fattah; Prasetyo, Singgih Dwi
SEMAR (Jurnal Ilmu Pengetahuan, Teknologi, dan Seni bagi Masyarakat) Vol 13, No 2 (2024): November
Publisher : LPPM UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/semar.v13i2.79467

Abstract

Taman bermain adalah suatu lingkungan yang didesain secara khusus untuk memberikan kesempatan kepada anak-anak untuk bermain, belajar, dan berinteraksi. Selain berfungsi sebagai tempat hiburan, taman bermain juga memiliki peran penting sebagai ruang pendidikan yang mendukung perkembangan fisik, kognitif, sosial, dan emosional anak-anak. Pengabdian ini memiliki tujuan untuk merancang desain wahana bermain ayun tangan yang mempertimbangkan faktor keselamatan, kenyamanan, dan pengembangan anak di Taman Mekarsari Desa Kaligentong, Kecamatan Gladagsari, Kabupaten Boyolali. Wahana bermain ayun tangan ini didesain dengan menggunakan material yang aman dan tahan lama, serta menerapkan prinsip-prinsip desain yang memungkinkan anak-anak untuk bergerak, bereksplorasi, dan menggunakan imajinasi mereka dengan bebas. Wahana bermain ayun tangan memiliki peran yang penting dalam meningkatkan kualitas hidup anak-anak dengan memberikan mereka kesempatan untuk bermain, belajar, dan tumbuh secara holistik. Dengan adanya wahana ini, anak-anak dapat mengembangkan keterampilan motorik, kognitif, dan sosial mereka sambil menikmati pengalaman bermain yang menyenangkan. Wahana ini diharapkan dapat menciptakan lingkungan yang merangsang interaksi sosial, memperluas keterampilan anak-anak, dan meningkatkan kualitas hidup mereka melalui kesempatan bermain dan belajar. Kata kunci : pengabdian, taman bermain, ayun tangan, edukasi
Co-Authors Adiputra, Suryadijaya Aditya Rio Prabowo Akbar, Hammar Ilham Alfaiz, Noval Fattah Budi Kristiawan, Budi Budiana, Eko Prasetya Didik Djoko Susilo Dwi Aries Himawanto Hanif, Shazia Himma Firdaus Imanullah, Fahmi Iput Kasiyanto Istanto, Iwan Kusnandar, Nanang Pranata, Aria Pratama, Anandito Adam Qudsiyyatul Lailiyah Rachmanto, Rendy Adhi Rumi Iqbal Doewes, Rumi Iqbal Singgih Dwi Prasetyo Supono, Ihsan Suyitno Suyitno Syamsul Hadi Tjahyana, Dominicus Danardono Dwi Prija Tri Istanto Ubaidillah - Ubaidillah Ubaidillah Utomo, Dimas Wahyu Utomo, Fahri Setyo Wibawa Endra Juwana, Wibawa Endra Wijaya, Rahman Wijayanta, Agung Tri Zainal Arifin