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All Journal Peronema Forestry Science Journal Jurnal Ilmiah Mahasiswa FEB ARABIYAT GEA, Jurnal Pendidikan Geografi Jurnal Agrotek UMMat Prosiding Seminar Nasional Sains dan Teknologi Terapan El-Tsaqafah: Jurnal Jurusan PBA Minda Baharu PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat JEECAE (Journal of Electrical, Electronics, Control, and Automotive Engineering) Academy of Education Journal Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Majamecha Jurnal ABDINUS : Jurnal Pengabdian Nusantara Jurnal Disastri: Pendidikan Bahasa dan Sastra Indonesia Mechanical Engineering for Society and Industry Makara Journal of Technology Cahaya bagaskara Jurnal Media Akademik (JMA) Global Forest Journal Jurnal Ilmu-ilmu Syari'ah
Luthfi Hakim
Departemen Kehutanan, Fakultas Pertanian, Universitas Sumatera Utara, Medan 20155, Indonesia
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Transportation Other

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ASETILASI KAYU KEMIRI (Aleurites moluccana), DURIAN (Durio zibethinus), DAN MANGGIS (Garcinia mangostana) Febrina Heryani Tarigan; Luthfi Hakim; Rudi Hartono
Peronema Forestry Science Journal Vol 1, No 1 (2012): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

The problem solve of unstable dimensions wood fruits and susceptible wood from termites attack was an attempt preservation of wood by acetylation. The research purposes were to knew the effect of wood variety and acetic acid concentration to retention value, to evaluated the Weight Percent Gain (WPG) and dimention stability, and to evaluated durability from attack termite based on laboratory dan grave yard test. Some kind of wood such as kemiri, durian, and manggis woods were treated by soaking during 2 weeks with acetic acid concentration of 10%, 15%, 20%, and 25%. The results showed that high retention on kemiri wood with concentration of 25% was 7.73 gr/cm3. Durian wood in concentration of 15% had WPG value (44.41%) was good dimention stability (67.8%). The increasing of acetic acid concentration caused the increasing of retention and wood resistance from termite attack in laboratory and grave yard test. Key words: acetic acid, wood acetylation, termites, WPG, ASE
Asetilasi Kayu Rambutan (Nephelium lappaceum L), Cempedak (Artocarpus integer Merr), dan Rambai (Baccaurea montleyana Muell. Arg) Jendro Zalukhu; Luthfi Hakim; Rudi Hartono
Peronema Forestry Science Journal Vol 1, No 1 (2012): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

The utilization of fruit woods increased according of increasing human needs. Several weakness of fruit woods were bad dimensional stability and susceptible wood from termite attack. Preservation can improve the dimensional stability and increase the wood from termite attack. One preservation method of was acetylation. The research purpose were to known the effect of rambutan, cempedak and rambai woods variety and acetic acid concentration to retention value, to evaluated the dimention stability and Weight Percent Gain and to evaluated durability from attack termite based on graveyard test and laboratory test. Some kind of wood such as rambutan, cempedak and rambai woods were treated by soaking during 2 weeks with acetic acid concentration of 10%, 15%, 20% and 25%. The results showed the effective retention on rambai wood with concentration of 20% was 3.81%. The high dimention stability ASE on rambutan wood with concentration of 15% was 73.37%, and the high WPG on rambai wood with concentration of 25% was 46.66%. The increasing of acetid acid concentration caused the increasing retention and wood resistance from termite attack in graveyard test and laboratory test. Key words: Wood, acetylation, ASE, WPG, termite
Sifat Fisis dan Keawetan Alami Kayu Pengkih Terhadap Serangan Rayap Tanah (Macrotermes Gilvus) Jon Herianta Ginting; yunus afifuddin; Luthfi Hakim
Peronema Forestry Science Journal Vol 1, No 1 (2012): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

Availability of wood species from natural forest that commonly used for building contructions, meuble, craft and industrial materials nowadays is increasingly limited and not balanced with increasing the needs of wood. To fulfill the needs should be used the species of wood that easily obtained, such as the species that are less well known from natural forest or cultivated by people. The purpose of this research is to evaluate the physical propersties and natural durability of pengkih wood towards termite attack. These physical properties testing is based on the ASTM D 143-94 standard with three replications in each sample. These natural durability of wood testing based on the SNI 01-7207-2006 standard with four replications in each sample. Based on the results of this research pengkih wood is including class II of wood strength, that have value of density substance is 1.5 and including class I of grade durability with percentage of weight lose about 0.3-0.6%. The smallest value of attack intensity is in the  wooden base and the largest is in the end of the wood. .   Key words : Pengkih Wood, physical  properties, natural  durability, termites
Kualitas Papan Semen dari Partikel Serutan Pensil dengan Berbagai Rasio Semen dan Partikel Desi Natarina Sembiring; Luthfi Hakim; Tito Sucipto
Peronema Forestry Science Journal Vol 4, No 2 (2015): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

Cement-Bonded Particleboard made of pencil shaving industry waste has not developed in Indonesian. The main objective of this research was to evaluate the physical and mechanical properties of cement bonded from pencil shavings particles and determine the optimum cement-to-particle ratio. The treatment of cement/particle ratio were 90:10; 85:15; 80:20 and 75:25. Methods of this research were two steps curing. The first step was air curing using cold press for ±4 days and continued of second step was oven curing at 80̊ C for 24 hours. The result of the research showed that cement-bonded particleboard produced density value around 0,73-1,13 g/cm3, moisture content 8,37-12,16%, water absorption on immersion 2 hours and 24 hours around 23,78-43,48% and 27,33-51,90%, thickness swelling on immersion 2 hours and 24 hours around 0,79-1,82%  and 1,39-2,89%, modulus of elasticity around 114,21-880,17  kg/cm2, modulus of rupture around 7,32-18,52 kg/cm2 and internal bond around 0,88- 1,56 kg/cm2. The effect of cement/particle ratio on the research showed that 80:20 is very good compared from 90:10; 85:15 and 75:25.Key words: cement-bonded particleboard, pencil shavings particles, cement-to-particle ratio.
Kualitas Laminasi Bambu Betung (Dendrocalamus asper) pada Berbagai Perlakuan Ukuran Sortimen dan Buku Bambu Putri Rafika Wulandari; Luthfi Hakim; Tito Sucipto
Peronema Forestry Science Journal Vol 4, No 4 (2015): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

Laminated boards made from bamboo betung (Dendrocalamus asper) with the influence of different sizes and the presence of node sortimen. The purpose of this study was to evaluate the physical and mechanical properties of laminated bamboo betung, evaluating the effect of nodes and size sortimen the physical and mechanical properties of laminated bamboo board betung and determine the best size and the existence of the book sortimen bamboo as laminate raw material. Testing the water content, water absorption, delamination and bending strength is based JAS standard SE-7 2003 on Flooring surfaces while bonding strength testing is done based on ISO standard ISO 16981-2012.  The results show the quality of bamboo betung laminate board meets the standards JAS-7-2003 SE for testing moisture content, delamination, but for testing water absorption does not fulfilling. On the mechanical properties of bamboo betung laminated board meets the standards JAS-7-2003 SE for testing bending strength and meets ISO 16981-2012 standards for surface bonding strength testing. The best treatment for laminated boards are laminated boards without involving nodes with a size of 20 cm sortimen.Keyword : Dendrocalamus asper, node, sortimen size, laminated board
KOMPETENSI SOSIAL GURU IPA DI MADRASAH IBTIDAIYAH SWASTA ANNUR ISLAMIC FULLDAY SCHOOL TAHUN AJARAN 2020-2021 Ranisa Sagita; Nazar Ikhwan; Rohanis Luthfiyyah Rahma; Luthfi Hakim
Academy of Education Journal Vol 13 No 1 (2022): Academy of Education Journal
Publisher : Fakultas Keguruan dan Ilmu Pendidikan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (185.694 KB) | DOI: 10.47200/aoej.v13i1.990

Abstract

Social competence is the ability of teachers to communicate and interact effectively and efficiently with students, fellow teachers, parents/guardians of students and the surrounding community. A teacher must try to develop communication both in the school environment and in the community. This research uses naturalistic qualitative research, which aims to make jokes in a systematic, accurate and accurate way about the facts or encountered in the field. The result of this research is that science teachers have not fully implemented social competence indicators. The indicators that have not been fully implemented are building effective communication with parents of students, and science teachers have not communicated with their own professional community and other professions orally and in writing or in other forms
Medium Density Fibreboard Made of Acetylated Sludge from Paper Mill Hakim, Luthfi; Herawati, Evalina; Wistara, I Nyoman Jaya
Makara Journal of Technology Vol. 15, No. 2
Publisher : UI Scholars Hub

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Abstract

Medium Density Fibreboard Made of Acetylated Sludge from Paper Mill. Research of using sludge as raw material for making medium density fibreboard (MDF) was useful to create additional value of sludge. The objective of the research was to evaluate physical properties, mechanical properties, and durability of MDF from acetylated sludge in 4 levels of acetate anhydride (0%, 3%, 5%, and 7%) with 3 replicates. The MDF was made using dry process. After materials were mixed with adhesives, they were pressed using hotpress under 170 oC temperature and 45 Pa pressure for 25 minutes. The size of the MDF sample was 25 cm x 20 cm x 1 cm with 0.8 g/cm3 density. The physical properties (density, moisture content, water absorption, thickness swelling) and mechanical properties (modulus of elasticity, modulus of rupture, internal bond, screw holding power) was tested based on JIS A 5905-2003 standard. The durability was evaluated using SNI 01-7207-2006. All physical properties of MDF fulfill JIS A 5905-2003. Acetate anhydride decreased the moisture content value of MDF. On the other hand, all mechanical properties did not fulfill the standard. That was caused by calcium carbonate in sludge that blocked the adhesion between sludge fibres. The durability of MDF tested here was classified Class I which is very resistant to termites.
SISTEM AIR MINUM OTOMATIS PORTABLE BERBASIS SOLAR CELL Towijaya; Luthfi hakim; sukmo sudiono
Cahaya Bagaskara : Jurnal Ilmiah Teknik Elektronika Vol. 5 No. 2 (2020): Vol. 5. No. 2 - Agustus 2020
Publisher : Universitas Muhammadiyah Pekajangan Pekalongan

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Abstract

Pembuatan alat ini bertujuan untuk memberika solusi permasalahan air minum untuk memenuhi kebutuhan masyarakat yang sedang terdampak bencana alam. Karena pada saat bencana keberadaan air minum sangat terbatas dan berdasarkan pokok permasalahan tersebut penulis membuat alat pensuplai air minum otomatis portable berbasis solar cell. Alat ini berfungsi untuk mengoptimalkan pendistribusian air minum agar efisien system energi listrik yang digunakan pada alat ini menggunakan tegangan 12 volt dc dari aki sebagai penyimpanan daya . Pemanfaatan energi listrik tenaga matahari yang dirancang dengan menambahkan beberapa komponen pendukung seperti timer, solenoid valve, limith swith, relay dan pompa air dibuat menjadi sistem kran air otomatis. Sistem ini bekerja dengan dikontrol oleh timer, limit swith dan solenoid valve yang dapat mengatur jadwal buka keran air secara otomatis dan membatasi volume air yang mengalir pada kran. Metode yang dilakukan pada aplikasi ini dengan memanfaatkan system sollar cell atau tenaga matahari yang keberadaanya tidak terbatas, kemudian system ini dikendalikan oleh limit swith dan relay untuk mengatur pompa air agar dapat bekerja sesuai yang diharapkan Berdasarkan hasil penelitian diperoleh kesimpulan bahwa, solar cell 50 wp dapat mengisi aki 32 ah dengan waktu 9 jam 2 menit dan juga dengan aki tersebut dapat mengoperasikan beban secara terus menerus dengan daya 37 watt selama 8 jam 36 detik dan hasil perancangan ini didapat bahwa kran air akan terbuka pada saat diberik instruksi membuka secara otomatis, kemudian akan tertutup apabila waktu operasi timer telah habis ( 36 detik ) dan air telah mencapai batas volume yang telah ditentukan yaitu satu liter
NILAI RELIGIUS BUKU TEKS BAHASA INDONESIA KELAS IX DAN RELEVANSINYA DENGAN AYAT-AYAT AL-QUR’AN Luthfi Hakim
Jurnal Disastri (Jurnal Pendidikan Bahasa dan Sastra Indonesia) Vol 4 No 1 (2022): Jurnal Disastri: Pendidikan Bahasa dan Sastra Indonesia
Publisher : Program Studi Pendidikan Bahasa dan Sastra Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33752/disastri.v4i1.2154

Abstract

Sebagai pemelajar muslim, sudah sepatutnya apa yang dipelajari berpegang teguh pada sumber pedoman utama yaitu Al-Qur’an. Penelitian ini memfokuskan pada buku teks Bahasa Indonesia kelas SMP/MTs IX terbitan Kemendikbud edisi revisi 2018. Perkembangan usia pemelajar SMP/MTs yang masih mencari jati diri dan rentan mendapatkan pengaruh dari luar menjadi pertimbangan pemilihan bahan penelitian ini. Maka, bentuk-bentuk nilai haruslah tertera dengan jelas dan mudah dipahami dan diimplementasikan oleh pemelajar, serta guru juga mudah mencontohkan dan meneladankan secara nyata dalam kehidupan di sekolah. Berdasarkan latar belakang tersebut, peneliti mencoba mendeskripsikan nilai religius yang terdapat pada buku teks Bahasa Indonesia SMP/MTs kelas IX serta bagaimana relevansinya dengan ayat-ayat Al-Qur’an. Metode penelitian yang digunakan adalah deskriptif kualitatif, yaitu metode penelitian yang dijalankan dengan mengumpulkan data, mengklasifikasikan data, kemudian merumuskan kaidah-kaidah terhadap keteraturan yang terdapat atas data itu (Chaer, 2006:9).Objek yang digunakan adalah buku teks Bahasa Indonesia Kelas IX yang diterbitkan Kemendikbud edisi revisi tahun 2018 dan terdiri dari 184 halaman. Data-data yang diperlukan sebagai bahan penelitian berupa kata, frasa, klausa, kalimat, paragraf, dan wacana yang memuat konten-konten tentang penerapan pendidikan karakter religius dalam buku teks. Berdasarkan hasil penelitian ditemukan 13 data yang mengandung nilai pendidikan religius, yaitu: 4 data nilai religius menjaga alam sebagai titipan Allah SWT, 1 data nilai religius menunaikan salat sebagai kewajiban, 2 data nilai religius Al-Qur’an sebagai pedoman kehidupan, 3 data nilai religius mensyukuri nikmat Tuhan, 1 data nilai religius semua adalah milik-Nya dan akan kembali kepada-Nya, 1 data nilai religius menghadapi masalah, bukan mengeluhkannya, dan 1 data nilai religius semua manusia sama.
Anatomical characteristic and fiber morphology of fibrovascular bundle of Indonesian nipa (Nypa fruticans) frond Estri Yosa Damanik; Ridwanti Batubara; Hakim, Luthfi
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.v2i02.15683

Abstract

Nipa (Nypa Fruticans) is a palm tree that grows in wetlands and mangroves. Nipa fronds possess lignocellulose and hold the potential as a viable source for producing composite boards, pulp, and paper. This research aims to identify the anatomical and morphological characteristics of nipah fronds fiber, especially in the fibrovascular bundle. Nipa fronds were observed in the radial and longitudinal directions. There are four zones in the radial direction, consisting of the outer zone (convex and concave), middle zone, and inner zone. The longitudinal positions consist of the bottom, intermediate, and upper. Anatomical characteristics were observed using a light microscope focused on the fibrovascular bundle's characteristics. Fiber morphology was measured at each position with 20 repetitions of each measurement. The results showed that the number of FVB increased from the outer zone, especially convex towards the middle and inner zone. Thus, the outer fronds are denser than the inner zone. Based on observations of fiber morphology, the concave (radial) zone in the intermediate position (longitudinal) has the longest fiber compared to the other parts. Meanwhile, the cell wall thickness is greatest at the bottom of the concave zone. The widest lumen diameter is the convex zone at the bottom position. This research can conclude that the FVB of nipa palm fronds, both longitudinal and radial, are included in quality class III, which is good enough to be used as raw material for pulp and paper.
Co-Authors Abdul Qodir Achmad Rijanto Anton Nugroho AR, Rusman Ariga Bahrodin Bahrudin, Sirojul Damai, Reo Desi Natarina Sembiring Dewantara, Prana Dodi W. Irawanto Dyah, Atika Isnaining Erna Herawati, Erna Erna Tri Asmorowati Estri Yosa Damanik Evalina Herawati Fadhilla, Suri Faruq, Ahmad Febrina Heryani Tarigan Harisyah Manurung Harpah, Novrida Hasibuan, Ulfa Zahara I Nyoman Jaya Wistara Ilahiyah, Iva Inayatul Ilahiyah, Iva Inyatul Jendro Zalukhu Jon Herianta Ginting Khasif, Mohamad Kurniawan, Juni Adi Kurniawan, Mochamad Oky Tri Lailatul Qomariyah, Lailatul Lubis, Muhammad Safi Lubis, Yunida Syafriani Marcelila Medynda Mislaini Moch. Sony Fauzi Mohammad Muslimin Mu’at, Mu’at Nabila, Fani Putri Nasution, Zaid Perdana Nazar Ikhwan Niswah MZ, Isniyatun Niswah, Isniyatun Novansyah, Fakrizal Nugroho, Rofiantoko Nur Kuswanti Nurul Hikmah Oding affandi Pradana, Angga Andi Putri Rafika Wulandari Ranisa Sagita Ridwanti Batubara Ridwanti Batubara Rohani, Ade Sri Rohanis Luthfiyyah Rahma Rudi Hartono Saleha Hannum Siregar, Naudi Hayati Siswanto, Sandu Situmorang, Syafizal Helmi Sucipto, Tito sukmo sudiono Sulaiman Ali Sutardi Sutardi Syahrul R, Syahrul Syarifuddin, Mukhamad Arief Syurkarni Ali T Towijaya Tarmidi Tarmidi Wawan Aries Widodo Yunus Afifuddin Zain Lillahulhaq Zulfika, Dicki Nizar