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The Effect of Clay Tile Particle Addition on the Flame Retardancy and Impact Toughness of Ramie Fiber-Reinforced Polypropylene Composites Gibrail, Muhammad; Hastuti, Sri; Listyanda, R. Faiz; Saputra, Eko; Nugroho, Wahyu; Putri, Farika Tono; Indrawati, Ragil Tri; Salahudin, Xander
Jurnal Rekayasa Mesin Vol. 21 No. 1 (2026): Volume 21, Nomor 1, April 2026
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v21i1.7458

Abstract

Environmental concerns regarding polypropylene (PP) plastic waste have driven the demand for more sustainable alternative materials through composite development. This study aims to analyze the effect of adding Sokka roof tile particles as a filler on the flame retardancy and impact toughness of ramie fiber-reinforced composites. The composite materials utilize a polypropylene matrix, ramie fiber reinforcement, and Sokka roof tile particles as filler with concentration variations of 2%, 4%, and 6%. The results demonstrate that increasing the filler volume significantly improves the material's flame-retardant properties, with the 6% variation achieving the best thermal performance and the lowest burn rate of 214.27 mm/min. However, in terms of mechanical properties, a decline in impact toughness was observed as the filler content increased; the average energy absorption dropped from 1.075 Joules at 2% concentration to 0.735 Joules at 6%, which is consistent with the decrease in impact strength from 0.0364 J/mm² to 0.0204 J/mm². This phenomenon indicates that while inorganic particles effectively serve as a thermal barrier, excessively high concentrations increase material brittleness, thereby reducing the impact energy absorption capacity. In conclusion, a 6% concentration of Sokka roof tile particles is recommended for applications prioritizing fire safety, while considering the compromise in mechanical strength.
The Indonesian version of irrational beliefs tests in rational emotive behavior therapy: adaptation of irrational beliefs tests Margaretha, Maria; Hastuti, Sri
COUNS-EDU: The International Journal of Counseling and Education Vol. 2 No. 2 (2017)
Publisher : Indonesian Institute for Counseling, Education, and Therapy & Indonesian Counselor Association

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23916/002017026220

Abstract

This Indonesian version of Irrational Beliefs Test (IV-IBT) measures the irrational thoughts in accordance with the irrational belief’s concept by Albert Ellis (Rational Emotive Behavior Therapy) and is the result from the language and cultural adaptation of Irrational Beliefs Test (IBT; Richard Garner Jones, 1968). There are 10 irrational thoughts contained in IBT namely demand for approval, high self-expectation, blame proneness, frustration reactive, anxious overcome, problem avoidance, dependency, helplessness, perfectionism. IBT consists of 100 items originating from 10 items for each type of irrational thoughts. The IBT adaptation process was conducted using the Guidelines for test translations (van de Vijver & Hambleton, 1996), and further elaborated into four major steps, namely (1) the translation from English into Indonesian by an expert in English language and a psychologist, and from Indonesian into English by two experts in English language, (2) content validity assessment by three assessors who master the REBT concepts and psychological measurement, (3) dimensionality examination with exploratory factor analysis, (4) empirical testing to obtain the accurate, adequate, and relevant item formulation involving 302 students. The Irrational Beliefs Test consists of 31 items, 10 factors, and is unidimensional (single dimension) in nature. Results and discussion are described in the Indonesian culture context.
Indonesian Language Learning Based on Ecological Literacy in Improving Students Language Skills Hastuti, Sri; Suhita, Raheni
Journal Evaluation in Education (JEE) Vol 6 No 1 (2025): January
Publisher : Cahaya Ilmu Cendekia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37251/jee.v6i1.1297

Abstract

Purpose of the study: This study investigates the integration of a contextual learning model based on ecological literacy in Indonesian language learning within vocational high schools. The aim is to enhance students' language skills and foster their active participation in learning Indonesian through contextual and relevant experiences. Methodology: The study employs a qualitative descriptive approach, analyzing classroom learning processes. Data sources include speech, actions, and supporting documents collected during the research. Purposive sampling was used to select teachers and students from class X of Vocational High Schools 1 Sawit Boyolali as participants. Research instruments consisted of observation records, interview lists, and documentation. Method triangulation was applied to ensure validity, incorporating observations, interviews, and analysis of classroom learning processes. Data were analyzed descriptively to present detailed findings and draw conclusions. Main Findings: The findings reveal significant improvements in students’ language skills through ecological literacy-based Indonesian learning. The contextual learning model aligns with students’ vocational expertise, enabling them to engage deeply with language in practical and meaningful contexts. This approach not only enhances reading and comprehension skills but also builds students' confidence in expressing ideas verbally and in writing. Novelty/Originality of this study: This study introduces a novel approach by integrating ecological literacy into Indonesian language education, addressing linguistic and environmental awareness. It provides new insights into how contextual learning tailored to students’ vocational fields can enrich language skills, bridging academic content with real-world applications. This research offers a valuable model for innovative and interdisciplinary education.
ANALISIS KESALAHAN BERBAHASA PADA SOAL UJIAN PELAJARAN BAHASA INDONESIA DI SMA Wardani, Shinta; Setiawan, Budhi; Hastuti, Sri
Basastra: Jurnal Bahasa, Sastra, dan Pengajarannya Vol 8, No 1 (2020): Basastra: Jurnal Bahasa, Sastra, dan Pengajarannya
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (415.406 KB) | DOI: 10.20961/basastra.v8i1.42018

Abstract

This research aims to describe and explain: (1) the kinds of mistakes-speaking on the matter, (2) the cause of the error on the question of language, (3) communication effects caused due to an error on a question of language Final Assessment  subjects Indonesian Language grade XI public senior high school in Sukoharjo Area school, (4) understanding teacher against the rule drafting problem , and (5) precision drafting problem Final Assessment subjects Indonesian Language grade XI public senior high school in Sukoharjo  based on rules of preparation of a matter. This type of research is qualitative research. Qualitative research this time is both a content analysis (content analysis) with the main data source about the Final Assessment of the Odd Semester subjects Indonesian Language grade XI public senior high school in Sukoharjo . The technique of sampling with purposive sampling and snowball sampling. This research uses data sources triangulation and triangulation method as a test of the validity of the data. The results of the analysis of the findings can be explained as follows. First, errors in language reserved assessment of the end of the Semester in the form of spelling errors, Word, and sentence. Second, language mistakes caused by internal factors and external factors. Internal factors in the form of less understand linguistic rules, the lack of rigour in drawing up the question, a habit of relying on a team of editing, and the wrong habits. While external factors in the form of the mistakes of other languages, is vulnerable for a short time, and there is no evaluation. Third, the effect of communication language errors are significant because the learners feel difficulty in understanding the intent of the question. Fourth, teachers less understand rule drafting reserved either in theory or practice. Fifth, the question of the drafting of the Rules contained in the matter of the assessment of the finalsemester subjects Indonesian Language grade XI public senior high school in Sukoharjo  is not fully using the rules of preparation of the matter that is being applies both from the aspect of material and construction aspects.
Penelitian Tindakan Kelas Sebagai Upaya Peningkatan Pengembangan Pembelajaran Mahasiswa PBI UNS Hastuti, Sri
DWIJA CENDEKIA: Jurnal Riset Pedagogik Vol 6, No 3 (2022): DWIJA CENDEKIA: Jurnal Riset Pedagogik
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (567.798 KB) | DOI: 10.20961/jdc.v6i3.68126

Abstract

Pemberdayaan Masyarakat melalui Pembuatan Detergen Cair Alami Berbasis Buah Lerak untuk Mengurangi Penggunaan Bahan Kimia Berbahaya Masykur, Abu; Fitriana, Dina; Hastuti, Sri; Wibowo, Atmanto Heru; Purnawan, Candra; Cinta, Denna Artika; Nabilla, Khairunnisa
SEMAR (Jurnal Ilmu Pengetahuan, Teknologi, dan Seni bagi Masyarakat) Vol 14, No 2 (2025): November
Publisher : LPPM UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/semar.v14i2.109413

Abstract

Aktivasi peran masyarakat dalam menjaga lingkungan perairan penting dilakukan untuk menumbuhkan kesadaran masyarakat. Salah satu caranya adalah melalui edukasi tentang pentingnya menggunakan bahan rumah tangga yang ramah lingkungan. Kegiatan pengabdian dilakukan dengan melakukan sosialisasi kepada kelompok PKK di Perumahan Pondok Baru Permai IV, Kelurahan Ngesrep, Kecamatan Ngemplak, Kabupaten Boyolali mengenai dampak penggunaan detergen kimia yang berlebihan terhadap lingkungan. Pada sosialisasi ini, dikenalkan detergen ramah lingkungan yang berbahan dasar buah lerak yang kemudian diikuti dengan demonstrasi dan pelatihan. Keberhasilan kegiatan diukur dengan menganalisis hasil pretest dan posttest. Hasil menunjukkan adanya peningkatan pemahaman yang ditunjukkan oleh hasil posttest yang meliputi (1) anggota kelompok PKK telah mengetahui kandungan dalam detergen dan isu pencemaran lingkungan karena detergen komersial yang dievaluasi melalui peningkatan nilai rata-rata yang semula 87 pada pretest menjadi 99 pada postest. (2) Anggota kelompok PKK memahami cara membuat detergen cair berbasis lerak. Dengan demikian, kegiatan pengabdian ini memberikan implikasi mampu meningkatkan pengetahuan anggota kelompok PKK mengenai dampak penggunaan detergen konvensional, bahan alam yang potensial untuk digunakan sebagai bahan dasar detergen alami ramah lingkungan, dan keterampilan dalam membuat detergen cair dari bahan alam.
Co-Authors Abd Hamid Abdul Latief Abu Masykur Afina, Afina Ahlun Ansar Ahmad Dahlan Ahmad Restani Syukron Thayyib Ainni, Anandhiska Arla Nur Alfabetian Harjuno Condro Haditomo Alya, Nur Alya Fadilla Ismail Andika Saputra Anggraeni, Devi Putri Annisa Andriyani Ansar Ansar Anwar, Andi Ratu ayuashari Ari Kuncara Widagdo Asiyah, Dewi Atmanto Heru Wibowo Auliadi, Diwa Lingga Ayu Dita, Diana Azhari, Fadhlan Aziz, Nurul Bintoro, Sefrian Rizki Boy Arya Sadewa Bramono Pandu Budhi Setiawan Cahyaningtyas, Annisa Putri Candra Purnawan Catur Pramono Cinta, Denna Artika Ciptaningtyas, Ciptaningtyas Dadieng Kurniawan Danang Wisnu Wardana Daroini, Ahsin Darsono, Febri Budi Dekki Umamur Ra’is Desiana Desiana, Desiana Dewi, Meirisa Isdiana Diana Chilmawati Djihadah, Nurhayati Doddy Setiawan Doni Edhy Susatya, Edhy Edi Waluyo Eko Saputra Endah Puji Lestari Etta Teguh Hermawan Fachri, Fandi Faisyal Faisal hakim Fajar Basuki Fakhrurriza Falah, Azril Hanif Fathur Rochman, Fathur Fiqri, Aidil Fitria Endah Fitriana, Dina Fuad Hilmy Gibrail, Muhammad Gita Irawanda Hadi, Johanes De Brito Firstian Hamdan Faozi Hary Soedarto Harjono Hasan Hasanah, Siti Roudotul Hassany, Ibnu Rosyid Al HB, Lukman Heriyanto Heriyanto Heryadi, Yadi Hujiroh, Shofa Ibnu Rosyid Ridwana Ichwantoro, Muhammad Rizky Iftitah, Siti Nurul Imran Imran Indrawati, Ragil Tri Irawanda, Gita Irfani, Hasna Haifa Ismail, Pitrah Rapi Izzul, Hanafi Jefry Prabowo khoerunnisa, Vina Khusna, Kunti Nafingatul Kr. J. Tompong, By Tri Agung Nusantara Kunti Sunaryo KURNIAWATI, YUYUN Kusharyanti Kusharyanti Kusharyanti Lili Handayani Lili Handayani Listyanda, R. Faiz Mahdi, Jausyan Al Mahrun, Pebri Akhrus Margaretha, Maria Maryanti, Siti Nur Mendrofa, Meliana Mintarti, Ari Mudha Rochmatillah Muhammad Ivan Ardiansyah Mulyawan, Yandi Munggaran, Rangga Murni Mahmud Nabilla, Khairunnisa Nani dkk. Mulyaningsih Nilmawati Nilmawati Ningrum, Listya Nirwana, Nirwana Noto Pamungkas Nurdin, Akhmad Nurhadi Nurhadi Nurma Handayani, Nurma Nurmalasari, Putri Nurul Annisa R Nuzula, Rifania Aura Pamungkas, Deni Paundra, Fajar Ponty S.P. Hutama Prabowo, Jefry Pramusinta, Mahesti Prasetio, Januar Eko Priyanto Priyanto Priyo Utomo Adi Nugroho Purnawati, Elisa Purwanto Putri, Adenna Hendy Cassie Putri, Aurellia Zaini Sya'bania Putri, Ericha Dwi Wahyu Syah Putri, Farika Tono R. Eliver, Eirnest Dave Son Raheni Suhita Rasyid, Syarifuddin Ratna Aulia Puspita Sari RATNASARI, DINE TRIO Retno Yulianti Retno Yulianti Ridwan Afandi Ridzal, Nining Asniar Ristiawan Agung Nugroho Rizki Dwi Ardika Rudi Haryadi, Rudi Safitra, Mohamad Nanda saputra, fajar Saputra, Raka Gilang Sintawati, Buni Fitria Siti Nuraliah, Siti Sitti Habibah Slamet Budi Prayitno Sri Suhermiyati Sri Suryaningsum Suanto Sukardi Weda, Sukardi Sumarliani, Sri Sumarlin Mus Sundari, Jualian Suratno, Eko Susanti, Reny Sutoyo Sutoyo Suyitno Taufik, Ikhwan Teguh Endah Saraswati Tri Gunawan, Tri Tri, Bagas Tristiana Yuniarti Triwinasis, Triwinasis Veithzal Rivai Zainal W, Wahyudi Wahira Wahira Wahyu Isti Nugroho Wahyu Nugroho Wahyu Redi Eka Saputra Wahyuanto, Eko Wardani, Shinta Wardhani, Nova Ariska Kusuma Wibowo, Rheza Ari Widiastuti, Sri Wahyuni Widodo, JDT Widodo, Joehananto D.T Widodo, Joehananto Djoko Teguh Wijayanti, Tri Cicik Wimaputri, Oktawira Winata, Widya Windyastuti Windyastuti Xander Salahudin Yeni Tata Rini Yosar Haritsar Yudha, Noval Fitra Yuvita Oktarisa, Yuvita Zakaria, Dinda Karunia Putri Zalfa Arridwan Zuhaery, Muhammad Zuhrotun, Zuhrotun