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Optimizing calliandra (Calliandra calothyrsus) biomass pellets: Impact of particle size and bark composition Wahyu Abdul Rahman; Suri, Intan Fajar; Indra Gumay Febryano; Saputra, Bagus; Duryat; Hidayat, Wahyu
Global Forest Journal Vol. 2 No. 02 (2024): Global Forest Journal
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/gfj.v2i02.15735

Calliandra biomass pellets offer a promising alternative energy source to replace fossil fuels. Typically, these pellets are produced by directly processing the stem and bark of the calliandra (Calliandra calothyrsus) plant without separation, aiming for manufacturing efficiency. This study investigated the quality differences between calliandra biomass pellets with and without bark and varying particle sizes. Particle sizes used were 20 mesh, 40 mesh, and 60 mesh. The pellets were made using a 12 mm diameter biomass pellet mold and a manual hydraulic press with a pressure of 3 tons. Characterization involved assessing proximate analysis, calorific value, physical and mechanical properties, and Fourier Transform Infrared analysis. The test results were compared with biomass pellet standards from Indonesia, Japan, Korea, and Germany. Results indicate that bark affects several properties, with higher ash content observed in pellets with bark due to the higher mineral content in bark. Volatile matter decreases with finer particle size, influencing combustion rate. Moisture content is higher in pellets with bark, impacting combustion efficiency and smoke production. Fixed carbon values are influenced by moisture and volatile matter content. Calorific values are generally higher in pellets without bark and smaller particle sizes. Density and compressive strength increase with decreasing particle size. FTIR analysis reveals differences in functional groups between pellets with and without bark, indicating variations in chemical composition. Overall, this research provides insight into the potential of calliandra biomass pellets with bark and without bark along with particle size as a renewable energy source.

Zoning Patterns of Mangrove Forests in Lampung Timur Regency Imron; Duryat; Irawan, Sandy Erggi; Tri Maryono; Rodiani
Journal of Sylva Indonesiana Vol. 7 No. 01 (2024): Journal of Sylva Indonesiana
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jsi.v7i01.14202

Mangrove forests form due to vegetative distribution along coastlines with varying growing conditions concerning substrate, freshwater intake, and oceanic currents. These disparities facilitate zoning and subsequent distinct growth patterns. The research objective was to identify the zoning structure of mangrove ecosystems in Lampung Timur Regency, Lampung Province, Indonesia. The degradation of mangrove forests in Lampung Timur Regency was thought to be caused by anthropogenic activities and inappropriate zoning patterns. Concerning data collection, the cluster sampling method was employed, which was selected based on the preliminary study's findings that the mangrove status in the study area exhibits a variety of substrates, freshwater supply, and strong ocean currents. There are five clusters on the study site, with each cluster containing sample plots measuring 10m x 10m. The sampling method employed a striped path starting from the outermost part of the mangrove ecosystem, with the number of plots in each cluster dependent on the thickness of the mangrove vegetation. A regional map and GIS applications were used for mangrove zonation mapping, and the factors influencing the zonation of mangrove ecosystems were analyzed descriptively. The research findings demonstrated that the mangrove ecosystem located in Lampung Timur comprises three distinct zones: the outer zone, the middle zone, and the terrestrial zone

Optimization of CO2 Laser Cutting Variables of Sengon Plywood (Paraserianthes falcataria) Using Response Surface Methodology Nugraha, Muhammad Dimaz; Iswandaru, Dian; Duryat; Hidayat, Wahyu
Journal of Sylva Indonesiana Vol. 7 No. 02 (2024): Journal of Sylva Indonesiana
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jsi.v7i02.14850

Sengon (Paraserianthes falcataria) wood is used for various purposes, including furniture, plywood, pallets, and building materials. Consumer demand for decorative wood is increasing, so innovation is needed to make it more productive and efficient. A laser cutting machine is one of the alternatives to answer this problem. Because CO2 gas wavelength and energy density offer the highest cutting quality, CO2 lasers are appropriate for wood processing. This study aims to determine the effect of laser power intensity and cutting speed on cutting plywood to get the best results. The plywood used has a thickness of 12 mm. The laser intensities used were 30 Watt, 35 Watt, 40 Watt, 45 Watt, and 50 Watt with cutting speeds of 2 mm/s, 4 mm/s, 6 mm/s, and 8 mm/s, with nozzle standoff distance set to 10 mm. In each repetition on the same sheet determine the comparison or variation of each variable used. Based on the measurement results, the highest width was obtained at 50 Watt power and 2 mm/s speed, and the lowest at 35 Watt power and 8 mm/s. The highest depth was 50 Watt and 2 mm/s, and the lowest was 30 Watts and 4 mm/s. The overall color change (âˆ†E*) increased with increasing laser power. The higher the laser power, the more the color change increases. The change in âˆ†E* decreased as the laser speed increased. The optimization of cutting sengon plywood with CO2 laser using RSM method resulted in an optimum combination at 40 Watt laser power and 8 mm/s speed with a desirability value of 0.623

Species Diversity and Herbal Medicine Utilization of Mangrove Plants: A Comparative Study among Coastal Communities in Lampung Duryat; Yuwono, Slamet Budi; Riniarti, Melya; Hidayat, Kuswanta Futas; Hidayat, Wahyu; Rodiani; Damai, Abdulah Aman; Prasetyo, Pangestu; Dani, Hafiz Ansori
Jurnal Sylva Lestari Vol. 12 No. 3 (2024): September
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v12i3.936

Biodiversity and local wisdom in mangrove ethnopharmacology are essential to study as a basis for conservation and health development. The study objectives were determining mangroves’ diversity and distribution, their use as herbal medicine, and their trusted medical properties. Vegetation analysis was employed to study the mangrove diversity. An interview and observation were conducted to study mangrove utilization. Mangrove diversity was determined by examining the diversity index. Mangrove utilization was determined by descriptive comparative analysis and calculating species use value, plant part value, and fidelity level. Total 28 species of mangroves from 15 families in Lampung. The highest mangrove diversity is in Lampung Timur (22 species; Shannon Index (H') = 1.93), followed by Pesawaran (21 species; H' = 1.96), Tulang Bawang (12 species; H' = 1.24), and Lampung Selatan (11 species H' = 0.90). Surprisingly, a species was used for different purposes in different areas. S. caeseolaris has the highest species use value of 0.1591. Leaves have the highest plant part value of 58%. R. apiculata, as an antiseptic, and S. caseolaris, as an antioxidant, have the highest fidelity level, 14%. Eight mangrove species trusted by the community have ten medical properties. This finding could be the basis for scientific studies to find new sources of medicine. Keywords: biodiversity, costal area, ethnopharmacology, herbal medicine, mangrove

PEMBELAJARAN SOSIAL DAN EMOSIONAL (PENGALAMAN PRAKTIS PENDIDIKAN GURU PENGGERAK) Riswakhyuningsih, Tri; Susiati, Eva; Wulandari; Duryat; Khusnul Fatekhah, Helmi; Kumariyah
RISTEK : Jurnal Riset, Inovasi dan Teknologi Kabupaten Batang Vol 9 No 2 (2025): RISTEK :Jurnal Riset, Inovasi dan Teknologi Kabupaten Batang
Publisher : Bapelitbang Kabupaten Batang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55686/ristek.v9i2.199

Social and Emotional Learning (SEL) is the 6th module of 10 modules studied in the education of driving teachers. The purpose of the study was to share SEL experiences. The study was conducted using a qualitative descriptive method. Data sources were SEL modules, independent assignments, group assignments, and reflection journals. Data were collected by reviewing modules, exploring the Learning Management System, and documentation. Data analysis was carried out using triangulation techniques. Learning activities used the flow: starting from oneself, concept exploration, collaboration space, contextual meaning, elaboration of understanding, connections between materials, and real action. Starting from oneself, reflection of one's own experience in facing personal crises, the ability to build positive relationships with others and its influence on learning. Concept exploration, exploration of the importance of SEL, the CASEL framework, and implementation of SEL. Collaboration space, discussing and developing social and emotional competence empowerment program initiatives in schools. Contextual demonstration, demonstrating SEL in learning scenarios. Elaboration of understanding, elaborating understanding of SEL based on full awareness through independent learning and mutual cooperation. Connections between materials, making conclusions and connections between SEL with previous modules. Real action, sharing understanding of SEL implementation. Keywords: Leading Teacher, Leading Teacher Education, Social and Emotional Learning

COACHING UNTUK SUPERVISI AKADEMIK (PENGALAMAN PRAKTIS PENDIDIKAN GURU PENGGERAK) Riswakhyuningsih, Tri; Susiati, Eva; Wulandari; Duryat; Khusnul Fatekhah, Helmi; Kumariyah
RISTEK : Jurnal Riset, Inovasi dan Teknologi Kabupaten Batang Vol 9 No 2 (2025): RISTEK :Jurnal Riset, Inovasi dan Teknologi Kabupaten Batang
Publisher : Bapelitbang Kabupaten Batang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55686/ristek.v9i2.200

Coaching for Academic Supervision is the 7th module of 10 modules studied in the education of driving teachers. The purpose of the study is to share coaching experiences for academic supervision. The study was conducted using a qualitative descriptive method. Data sources were coaching modules for academic supervision, independent assignments, group assignments, and reflection journals. Data were collected by reviewing modules, exploring the Learning Management System, and documentation. Data analysis was carried out using triangulation techniques. Learning activities used the flow: starting from oneself, concept exploration, collaboration space, contextual demonstration, elaboration of understanding, connections between materials, and real action. Starting from oneself, reflecting on experiences and feelings when being supervised. Exploration of concepts thinking paradigms and coaching principles, core coaching competencies and TIRTA as the flow of coaching conversations. Collaboration space, practicing coaching conversations with the TIRTA flow. Contextual demonstration, practicing coaching to help develop coachee competencies. Elaboration of understanding, questions and answers and coaching discussions in the realm of academic supervision. Connections between materials, concluding and making reflections. Real action, practicing academic supervision using the coaching thinking paradigm. Keywords: Academic Supervision, Coaching, Leading Teachers, Leading Teacher Education

PEMIMPIN DALAM PENGELOLAAN SUMBER DAYA (PENGALAMAN PRAKTIS PENDIDIKAN GURU PENGGERAK) Riswakhyuningsih, Tri; Susiati, Eva; Wulandari; Duryat; Khusnul Fatekhah, Helmi; Kumariyah
RISTEK : Jurnal Riset, Inovasi dan Teknologi Kabupaten Batang Vol 9 No 2 (2025): RISTEK :Jurnal Riset, Inovasi dan Teknologi Kabupaten Batang
Publisher : Bapelitbang Kabupaten Batang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55686/ristek.v9i2.203

Modul "Pemimpin dalam Pengelolaan Sumber Daya" merupakan modul ke-9 dari 10 modul dalam Program Pendidikan Guru Penggerak. Penelitian ini bertujuan membagikan pengalaman pembelajaran dari modul tersebut dengan menggunakan metode deskriptif kualitatif. Sumber data berasal dari modul, tugas mandiri, tugas kelompok, dan jurnal refleksi. Data dikumpulkan melalui telaah modul, eksplorasi Learning Management System, dan dokumentasi, kemudian dianalisis menggunakan teknik triangulasi. Pembelajaran mengikuti alur "MERDEKA" yang terdiri atas: Mulai dari Diri, Eksplorasi Konsep, Ruang Kolaborasi, Demonstrasi Kontekstual, Elaborasi Pemahaman, Koneksi Antar Materi, dan Aksi Nyata. Pada tahap Mulai dari Diri, dilakukan refleksi terhadap faktor-faktor yang memengaruhi ekosistem sekolah dan peran pemimpin. Eksplorasi Konsep mencakup pendekatan berbasis aset dan kekurangan, pemetaan sumber daya dengan pendekatan Asset-Based Community Development (ABCD), serta strategi pengelolaan sumber daya. Di Ruang Kolaborasi, peserta mengidentifikasi dan mempresentasikan pemanfaatan sumber daya secara efektif. Demonstrasi Kontekstual melibatkan analisis visi dan inisiatif perubahan serta refleksi peran pemimpin. Elaborasi Pemahaman dilakukan melalui diskusi dan tanya jawab. Koneksi Antar Materi menghasilkan kesimpulan, dan Aksi Nyata berupa praktik langsung identifikasi sumber daya di sekolah. Berdasarkan pengalaman pembelajaran ini, direkomendasikan agar: (1) implementasi pendekatan ABCD diperluas ke seluruh program guru penggerak untuk optimalisasi pemanfaatan sumber daya sekolah, dan (2) alur pembelajaran "MERDEKA" dapat diadaptasi dalam pengembangan modul-modul lainnya karena terbukti efektif dalam membangun pemahaman holistik

PENGELOLAAN PROGRAM YANG BERDAMPAK POSITIF PADA MURID (PENGALAMAN PRAKTIS PENDIDIKAN GURU PENGGERAK) Riswakhyuningsih, Tri; Susiati, Eva; i, Wulandari; Duryat; Khusnul Fatekhah, Helmi; Kumariyah
RISTEK : Jurnal Riset, Inovasi dan Teknologi Kabupaten Batang Vol 9 No 2 (2025): RISTEK :Jurnal Riset, Inovasi dan Teknologi Kabupaten Batang
Publisher : Bapelitbang Kabupaten Batang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55686/ristek.v9i2.205

Program management that has a positive impact on students is the 10th module of 10 modules studied in the education of teacher movers. The purpose of the study is to share learning experiences of program management that has a positive impact on students. The study was conducted using a qualitative descriptive method. Data sources include program management modules that have a positive impact on students, independent assignments, group assignments, and reflection journals. Data were collected by reviewing modules, exploring the Learning Management System, and documentation. Data analysis was carried out using triangulation techniques. Learning activities use the flow: starting from oneself, concept exploration, collaboration space, contextual meaning, elaboration of understanding, connections between materials, and real action. Starting from oneself, reflecting on their past learning experiences. Concept exploration, through reading, discussion, and reflection activities, and constructing understanding. Collaboration space, creating and presenting examples of programs that promote student leadership. Contextual demonstration, creating a program plan that utilizes the BAGJA change management model. Elaboration of understanding, discussion and Q&A with instructors related to learning programs that foster student leadership. Connections between materials, creating a synthesis of understanding about school programs that have an impact on students. Real action, implementing stages B&A based on the BAGJA change initiative model. Keywords: Leading Teachers, Positive Impact, Students, Program Management

PEMBELAJARAN SOSIAL DAN EMOSIONAL (PENGALAMAN PRAKTIS PENDIDIKAN GURU PENGGERAK) Riswakhyuningsih, Tri; Susiati, Eva; Wulandari; Duryat; Khusnul Fatekhah, Helmi; Kumariyah
RISTEK : Jurnal Riset, Inovasi dan Teknologi Kabupaten Batang Vol 9 No 2 (2025): RISTEK :Jurnal Riset, Inovasi dan Teknologi Kabupaten Batang
Publisher : Bapelitbang Kabupaten Batang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55686/ristek.v9i2.199

Social and Emotional Learning (SEL) is the 6th module of 10 modules studied in the education of driving teachers. The purpose of the study was to share SEL experiences. The study was conducted using a qualitative descriptive method. Data sources were SEL modules, independent assignments, group assignments, and reflection journals. Data were collected by reviewing modules, exploring the Learning Management System, and documentation. Data analysis was carried out using triangulation techniques. Learning activities used the flow: starting from oneself, concept exploration, collaboration space, contextual meaning, elaboration of understanding, connections between materials, and real action. Starting from oneself, reflection of one's own experience in facing personal crises, the ability to build positive relationships with others and its influence on learning. Concept exploration, exploration of the importance of SEL, the CASEL framework, and implementation of SEL. Collaboration space, discussing and developing social and emotional competence empowerment program initiatives in schools. Contextual demonstration, demonstrating SEL in learning scenarios. Elaboration of understanding, elaborating understanding of SEL based on full awareness through independent learning and mutual cooperation. Connections between materials, making conclusions and connections between SEL with previous modules. Real action, sharing understanding of SEL implementation. Keywords: Leading Teacher, Leading Teacher Education, Social and Emotional Learning

COACHING UNTUK SUPERVISI AKADEMIK (PENGALAMAN PRAKTIS PENDIDIKAN GURU PENGGERAK) Riswakhyuningsih, Tri; Susiati, Eva; Wulandari; Duryat; Khusnul Fatekhah, Helmi; Kumariyah
RISTEK : Jurnal Riset, Inovasi dan Teknologi Kabupaten Batang Vol 9 No 2 (2025): RISTEK :Jurnal Riset, Inovasi dan Teknologi Kabupaten Batang
Publisher : Bapelitbang Kabupaten Batang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55686/ristek.v9i2.200

Coaching for Academic Supervision is the 7th module of 10 modules studied in the education of driving teachers. The purpose of the study is to share coaching experiences for academic supervision. The study was conducted using a qualitative descriptive method. Data sources were coaching modules for academic supervision, independent assignments, group assignments, and reflection journals. Data were collected by reviewing modules, exploring the Learning Management System, and documentation. Data analysis was carried out using triangulation techniques. Learning activities used the flow: starting from oneself, concept exploration, collaboration space, contextual demonstration, elaboration of understanding, connections between materials, and real action. Starting from oneself, reflecting on experiences and feelings when being supervised. Exploration of concepts thinking paradigms and coaching principles, core coaching competencies and TIRTA as the flow of coaching conversations. Collaboration space, practicing coaching conversations with the TIRTA flow. Contextual demonstration, practicing coaching to help develop coachee competencies. Elaboration of understanding, questions and answers and coaching discussions in the realm of academic supervision. Connections between materials, concluding and making reflections. Real action, practicing academic supervision using the coaching thinking paradigm. Keywords: Academic Supervision, Coaching, Leading Teachers, Leading Teacher Education

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