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<![CDATA[Pengenalan dan Pelatihan Robot Lego pada Siswa Sekolah Menegah Pertama Sebagai Implementasi Pembelajaran STEM di Sekolah ]]>
<![CDATA[Gumilang, Yandhika Surya Akbar]]>;
<![CDATA[Rozaq, Abdul]]>;
<![CDATA[Sonalitha, Elta]]>;
<![CDATA[Rabi, Abd]]>;
<![CDATA[Sumarahinsih, Andrijani]]>;
<![CDATA[Krisdianto]]>;
<![CDATA[Fahreza, Moch. Aditya Rizky]]>
<![CDATA[ International Journal of Community Service Learning Vol. 7 No. 2 (2023): May 2023 ]]>
Publisher : <![CDATA[Universitas Pendidikan Ganesha ]]>
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DOI: 10.23887/ijcsl.v7i2.60811
<![CDATA[Pembelajaran STEM di Indonesia masih perlu perhatian. Pendidikan STEM dapat meningkatkan kongnitif, afektif dan psikomotorik siswa. Salah satu hal yang dapat meningkatkan pembelajaran STEM adalah melalui Pelatihan robot lego. Penelitian ini akan membahas implementasi pembelajaran STEM melalui pengenalan dan pelatihan robot lego. Pelatihan ini diadakan di SMP Bani Hasyim Kabupaten Malang. Pelatihan ini juga selaras dengan visi misi SMP Bani Hasyim yang menganut sistem pembelajaran inovatif dan kreatif. Metode yang digunakan yaitu metode deskriptif kualitatif melalui wawancara siswa-siswi dan guru sebelum dan sesudah pelatihan. Dilakukan FGD dengan guru dari SMP Bani Hasyim sebelum pelatihan berlangsung, agar dapat membuat media pembelajaran yang sesuai dengan levelnya. Peserta pelatihan berjumlah 22 siswa-siswi. Pada pelatihan terdapat 2 kegiatan yaitu pemamparan materi dan praktik langsung. Peserta dibagi 2 kelompok. Dalam merakit robot lego para peserta diberi sebuah misi yang harus dikerjakan. Para peserta berhasil menjalankan misi yang diberikan. Setelah pelatihan ini dilakukan pemahaman siswa terhadap teknologi dan robot meningkat. 80% peserta ingin mendalami robotika lebih lanjut. Dapat disimpulkan bahwa pelatihan ini menarik minat siswa-siswi SMP Bani hasyim, namun perlu adanya kegiatan serupa secara berkelanjutan.]]>
<![CDATA[KARAKTERISTIK BALOK BAMBU LAMINA SUSUN TEGAK DARI BILAH BAMBU ANDONG (Gigantochloa pseudoarundinacea (Steud.) Widjaja) ]]>
<![CDATA[I.M. Sulastiningsih]]>;
<![CDATA[Adi Santoso]]>;
<![CDATA[Krisdianto]]>
<![CDATA[ Jurnal Penelitian Hasil Hutan Vol. 34 No. 3 (2016): Jurnal Penelitian Hasil Hutan ]]>
Publisher : <![CDATA[BRIN Publishing ]]>
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DOI: 10.20886/jphh.2016.34.3.167-177
<![CDATA[The objective of the study was to determine the effect of various layer compositions on the properties of 3-layer vertically glued laminated bamboo beam (LBB). Bamboo strips for LBB fabrication were prepared from mature culms (± 4 years old) of andong bamboo (Gigantochloa pseudoarundinacea (Steud.) Widjaja) collected from private gardens in West Java. The strips were pre-treated by soaking them in 7% boron solution for four hours. Three-layer LBBs were manufactured with six different layer compositions, including bamboo combination with wood planks of manii (Maesopsis eminii Engl.) or sengon (Falcataria moluccana (Miq.) Barneby & J.W. Grimes) as the core layer. The LBB was manufactured using Water Based Polymer-Isocyanate (WBPI) adhesive. The glue spread and cold pressing time applied were 250 g/m and one hour, respectively. Results showed that the average density, moisture content, thickness swelling, and width expansion of LBB were 0.65 g/cm ; 11.1%; 2.09%; and 1.99%, respectively. No delamination occurred in all samples using WBPI adhesive, which indicates high bonding quality. The average bonding strength and percentage bamboo failure (dry test) of LBB were 61.6 kg/cm and 90%, respectively. The physical and mechanical properties of LBB were significantly affected by the layer composition. The presence of wood laminates as the core layer of LBB and the cross wide orientation of the core layer decreased mechanical properties of LBB. On the contrary, the presence of cross-layer in LBB structure increased dimensional stability of the produced LBB.Three-layer thick laminated bamboo beam made of vertically glued andong bamboo strips with various constituted layer composition and all constitued layers laminated together in parallel grain direction had strength values comparable to those of class II of solid wood strength, eventhough the core layer was made of sengon or manii planks.]]>
<![CDATA[PENGARUH PRAPERLAKUAN BAHAN BAKU TERHADAP KUALITAS PAPAN LAMINA ROTAN ]]>
<![CDATA[Adi Santoso]]>;
<![CDATA[Gustan Pari]]>;
<![CDATA[Krisdianto]]>;
<![CDATA[Karnita Yuniarti]]>;
<![CDATA[Jasni]]>;
<![CDATA[Heru Wibisono]]>
<![CDATA[ Jurnal Penelitian Hasil Hutan Vol. 40 No. 2 (2022): Jurnal Penelitian Hasil Hutan ]]>
Publisher : <![CDATA[BRIN Publishing ]]>
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DOI: 10.20886/jphh.2022.40.2.105–114
<![CDATA[Rattan has the potential to be developed into composite products with gluing technology into laminated rattan. However, as araw material, rattan has a weakness, namely that it contains chemical components that inhibit the adhesive bond with the chemicalmolecules of rattan. In an effort to overcome this, a technique for making composite rattan was carried out in order to obtain dataon the effect of pretreatment on rattan as a raw material. Rattan as a raw material is first dried by microwave, hydrothermalevaporation and conventional methods in order to reduce the levels of adhesive chemical components contained in rattan. This paperpresents the results of research on the technology of making laminated rattan from the Batang (Calamus zolingerii) large diameter(>20 mm) with mangium tannin adhesive. The results showed that the pre-treatment of rattan as a raw material in the form ofdrying by means of oven, steam, frying, hydrothermal, and microwave, each produced a different effect on the chemical componentscontained and the degree of crystallinity. The best rattan laminate board was obtained from rattan which was pretreated using a 1kW microwave oven (input) with a maximum energy strength of 50%.]]>
<![CDATA[PERUBAHAN WARNA DAN LAPISAN FINISHING LIMA JENIS KAYU AKIBAT PENCUACAAN ]]>
<![CDATA[Krisdianto]]>;
<![CDATA[Esti Rini Satiti]]>;
<![CDATA[Achmad Supriadi]]>
<![CDATA[ Jurnal Penelitian Hasil Hutan Vol. 36 No. 3 (2018): Jurnal Penelitian Hasil Hutan ]]>
Publisher : <![CDATA[BRIN Publishing ]]>
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DOI: 10.20886/jphh.2018.36.3.205-218
<![CDATA[The increase use of wood products for outdoor arises from warmth color and amenity properties of wood. However, wood is naturally degraded in term of color changes and finishing layer percentage after outdoor exposure. This paper presents wood color change and finishing layer durabillity after one year outdoor exposure. Five lesser known wood species from Riau were coated transparently using acrylic, enamel, polyurethane, ultran lasur ultra violet (UV), and ultran politur P-03 UV prior to outdoor exposure. Wood color differences were assessed according to CIELab system and coating film coverages were digitally analyzed by ImageJ software. The result showed that natural wood color turned into greyish pale after one year outdoor exposure. Color changes are relatively high in the first month then moderate and little changes every month there of. Finished layer wood samples were more resistant to weathering than unfinished surfaces. Finishing material of enamel (ET), lasur (LSR), and P03 (PP) experienced better coverage than acrylic and polyurethane finish. Finishing layer is gradually degraded, then re-finishing is necessary for optimal outdoor protection. Relationships between finishing coverage and color change showed medium correlation, where the greater finishing coverage, the greater the color changes.]]>
<![CDATA[VARIASI KEASAMAN DAN KAPASITAS PENYANGGA KAYU TAMPUI BERAS ( Baccaurea macrocarpa (Miq.) Muell.Arg.) dan MANGGIS HUTAN ( Garcinia cornea Miq.) ]]>
<![CDATA[Krisdianto]]>
<![CDATA[ Jurnal Penelitian Hasil Hutan Vol. 31 No. 4 (2013): Jurnal Penelitian Hasil Hutan ]]>
Publisher : <![CDATA[BRIN Publishing ]]>
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DOI: 10.20886/jphh.2013.31.4.242-249
<![CDATA[Wood acidity signifies an important factor that inflicts impact on metal corrosion and gives effect on adhesive bonding quality. Wood acidity varies not only between species, but also at different parts in the same tree. This paper studies the wood pH and buffering capacity at various positions in the same tree of two potential species from Rian. Those wood species are locally known as tampui beras (Baccaurea macrocarpa (Miq.) Muell. Arg.) and manggis butan (Garcinia cornca Miq.). The pH was determined using pH meter on the liquid of bot-water-extracted sawdust of the corresponding wood, while buffering capacity was measured by acid and base titration. The result shows that in average, acidity of tampui beras wood (5.2) is stronger than that of manggis hutan (6.3). Both wood species are classified as acid wood with pH less than 7. With respect to the tree height, sample taken from bottom part has the lowest pH value, while based on lateral position at the stem, progressing from the bark in depth to the pith the sapwood is higher in pH value than the beartwood and transition area. In every wood sample tested, acid buffer capacity is higher than base capacity.]]>
<![CDATA[KETERAWETAN ENAM JENIS KAYU DARI JAWA BARAT DAN RIAU ]]>
<![CDATA[Krisdianto]]>;
<![CDATA[Didik Ahmad Sudika]]>;
<![CDATA[Ahmad Wahyudi]]>;
<![CDATA[Mohammad Muslich]]>
<![CDATA[ Jurnal Penelitian Hasil Hutan Vol. 33 No. 4 (2015): Jurnal Penelitian Hasil Hutan ]]>
Publisher : <![CDATA[BRIN Publishing ]]>
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DOI: 10.20886/jphh.2015.33.4.329-336
<![CDATA[Preserving wood is one way to enhance its natural durability. The degree of wood protection achieved depends on the preservative impregnated in the wood and measured by its retention and penetration. Preservative retention is calculated based on the gravimetric system, while penetration is observed based on the colour differences after spot test. Preservative penetration pattern is observed visually and percentage is calculated conventionally. Digital image interpretation using Image-J software is one way to measure the preservative penetration. This paper studies the treatability of six wood species from West Java and Riau. Preservative penetration was interpreted both conventionally and digitally. Result shows hamirung, jaha and mahang putih wood species are classified into easy to preserve (class I), while bung bulang, pasang taritih and bira-bira wood species are classified asmediumto preserve (class II). Digital image identification provides easier, faster and more accurate in interpreting preservative penetration than the conventional method.]]>
<![CDATA[PENGUJIAN KETAHANAN BILAH BAMBU PETUNG (Dendrocalamus asper (Schults f.) Backer ex Heyne) TERHADAP JAMUR DENGAN CARA HAMPARAN TANAH ]]>
<![CDATA[Krisdianto]]>
<![CDATA[ Jurnal Penelitian Hasil Hutan Vol. 30 No. 3 (2012): Jurnal Penelitian Hasil Hutan ]]>
Publisher : <![CDATA[BRIN Publishing ]]>
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DOI: 10.20886/jphh.2012.30.3.208-217
<![CDATA[Durability performance is one of the important aspect of bamboo basic properties. As a lignocellulose material bamboo is susceptible to degrade by various organisms including fungi. Durability of bamboo is commonly assessed using wood laboratory testing procedure, such as agar plate method, an alternative soil bed test using unsterile soil is one attractive durability test method as it is cheap and simple to set up. This paper studies bamboo strips durability against fungus using soil bed test method. Bamboo strip tested were taken radially from inner (i), middle (m) and outer (o), and also longitudinally from bottom (B), parts of Dendrocalamus asper culms. The results show inner part strip (i) is more susceptible to fungi than the middle (m) and outer part (o). Almost all bamboo strips taken from inner part (1) failed to pin and hand bending test after six months exposure. Samples exposed in soil bed with 100% water bolding capacity decayed more severely than the 80% water bolding capacity. The bamboo strips from bottom (B) part were less susceptible than middle (M) and top (T) of bamboo height, bowever, the difference was not significant. Soil bed is an effective test method for bamboo strips durability against fungi.]]>
<![CDATA[PENGARUH PENGERINGAN TERHADAP PERUBAHAN WARNA, PENYUSUTAN TEBAL, DAN PENGURANGAN BERAT EMPAT JENIS BAMBU ]]>
<![CDATA[Adik Bahanawan]]>;
<![CDATA[Krisdianto]]>
<![CDATA[ Jurnal Penelitian Hasil Hutan Vol. 38 No. 2 (2020): Jurnal Penelitian Hasil Hutan ]]>
Publisher : <![CDATA[BRIN Publishing ]]>
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DOI: 10.20886/jphh.2020.38.2.69-80
<![CDATA[The surface color of bamboo stem changes naturally due to surrounding conditions. This paper studies the changesin bamboo surfaces color due to room temperature drying (KU) and oven drying (KO) at 60±2 °C. The color changesof four bamboo species: mayan (Gigantochloa robusta Kurz.), ater (Gigantochloa atter (Hassk) Kurz. Ex.Munro), ampel kuning (Bambusa vulgaris var. striata), and wulung (Gigantochloa atroviolacea Widjaja) werestudied together with their correlation to water loss. Color measurements were conducted based on CIE-Lab system,while water content related to weight loss and thickness shrinkage during KU and KO. The result showed that therewas a close relationship between water loss and discolouration of bamboo culms. The water loss of mayan, ater, andwulung showed a positive linear correlation to change of bamboo surfaces color, where the higher water loss affect greatervalue of color change too. Oppositely, in ampel kuning, higher water loss, affect smaller color change value (negativelycorrelated). This was because the natural color of ampel kuning in fresh conditions is not much different from colorafter drying. KU treatments, biggest thickness shrinkage was mayan = 46.03%; biggest weight reduction was ampelkuning = 28.52%; and biggest color changes (ΔE*) was ater = 15.51%. KO treatments, biggest thickness shrinkagewas mayan = 52.4%; biggest weight reduction was yellow ampel = 31.19%; and biggest color changes (ΔE*) wasater = 18.8%.]]>
<![CDATA[ANALISIS HASIL PENGUJIAN KAYU YANG DISERANG PENGGEREK KAYU DI LAUT DENGAN INTERPRETASI GAMBAR DIGITAL ]]>
<![CDATA[Krisdianto]]>;
<![CDATA[Listya Mustika Dewi]]>;
<![CDATA[Mohammad Muslich]]>
<![CDATA[ Jurnal Penelitian Hasil Hutan Vol. 33 No. 1 (2015): Jurnal Penelitian Hasil Hutan ]]>
Publisher : <![CDATA[BRIN Publishing ]]>
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DOI: 10.20886/jphh.2015.33.1.11-18
<![CDATA[Natural durability is determined through the tests of wood against wood attacking organisms. Natural durability of wood against marine borer was tested by exposing wood into the open sea water for six months. Damage intensity can be measured on the basis of digital image using Image-J software. This paper studies natural durability of nine wood species from Sumatera, Java and Kalimantan against marine borer. Results show that sempur lilin (Dillenia obovata Hoogl.), bambang lanang (Michelia champaca L.var. pubinervia) and kayu babang (Azadirachta excelsa (Jack) Jacobs) were classified into class durability I (very resistant), while cangcaratan (Lithocarpus sundaicus (Blume) Rehd. and avengekalakai (Shorea pervustipulata ssp. albifolia) were classified into class durability II (resistant) against marine borer. Ki pasang (Prunus javanica Miq.) and segelam (Hopea rudiformis) were grouped into class durability III (moderately resistant), while ki biwang (Arthophylum diversifolium Blume) and ki langir (Otophora spectabilis Blume) fall into class durability V (perishable). Damage intensity could be measured accurately using Image-J software. However, this method obtained higher damage percentage since the ex-rope hole was included in the measurement. Accordingly, the image method should be modified by excluding the ex-rope image to achieve high accuracy measurement.]]>
<![CDATA[PENGARUH ASETILASI TERHADAP PENYERAPAN UAP AIR PADA DUA JENIS KAYU TROPIS ]]>
<![CDATA[Krisdianto]]>
<![CDATA[ Jurnal Penelitian Hasil Hutan Vol. 30 No. 2 (2012): Jurnal Penelitian Hasil Hutan ]]>
Publisher : <![CDATA[BRIN Publishing ]]>
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DOI: 10.20886/jphh.2012.30.2.94-99
<![CDATA[Acetylation is an esterification process that aiming to replace bydrocyl groups with acetyl groups in the wood. The existence of acetyl group is expected to reduce water adsorption and stabilize wood dimension consequently. This study examined water adsorption on the two acetylated tropical wood species i.e. Anthocephalus chinensis and Calephyllum sp.Using isotherm method. The results show that water adsorption in wood of Antbucephalus is effectively reduced even at the smallest weight percentage gain, while in Calophyllum sp., it is effectively reduced at 10% weight percentage zain. The wuter adsorption varies by the relative humidity and it forms signoid madel from the lowest (11%) to the highest (97) of humidity.]]>
