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All Journal Jurnal Penelitian Pendidikan Guru Sekolah Dasar MESIN Jurnal Chemurgy Jurnal Teknik Jurnal Indonesia Sosial Sains
Lutfi Firmansyah, Lutfi
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Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Neuroscience Physics Social Sciences

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Pembuatan Keramik Dielektrik Dari Sistem (ZnO-TiO2) Pada Suhu Sinter 1450°C dan Karakterisitiknya Firmansyah, Lutfi; Suhandi, Andi; Syarif, Dani Gustaman
MESIN Vol 9, No 2 (2007): MEMINIMALKAN KERUGIAN KAMPUS AKIBAT BANJIR
Publisher : Program Studi Teknik Mesin, Universitas Trisakti

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Abstract

Formation Dielectric Ceramic from (ZnO-TiOJ System at 1450C SinteringTemperature and Their Characteristics, Synthesis of dielectric ceramics from (ZnO-TiOJ system at145&C and their characterization had been carried out. This investigation was done in order to knowthepossibility of the application of the ceramics for dielectric ceramics. The ceramics were produced bymixing powder ofZnO and Ti02 with the concentration in such away so that the concentration ofTiO?larger than thestoichiometric concentration ofZn2Ti04 andbysintering at I450"C. Characterization wascarriedout through XRD, microstructural and electrical analyses. The XRDand microstructure analysesshowed that the (ZnO-TiOJ system ceramics formed Zn2.xTi.x04 solid solution which accompanied bytheformation ofZn vacancy defect. No second phasefound in the ceramics. Lattice constant ofthe Zn2.xTii x04solid solution decreasedfollowing the increase ofthe concentration ofTi02 excess (expressed byx). The Ti02 excess affected the grain size of the Zn2.xTi, x04 ceramics although the effect was notsignificant. At high temperature, the excess of Ti02 increased the dielectric constant and dissipationfactor. The ceramicsproduced in this work had relatively low dielectric constant and loss tangent andgood stability in relation to temperature change, so they can be applied as ceramic substrate andcapasitor dielectric.
PENGARUH METODE OUTDOOR STUDY TERHADAP KETERAMPILAN MENULIS PUISI SISWA KELAS IV SDN LEMINGGIR KECAMATAN MOJOSARI KABUPATEN MOJOKERTO FIRMANSYAH, LUTFI
Jurnal Penelitian Pendidikan Guru Sekolah Dasar Vol 7, No 5 (2019)
Publisher : PGSD FIP UNESA

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Abstrak Penelitian ini bertujuan untuk mengetahui adanya pengaruh metode Outdoor Study terhadap keterampilan menulis puisi siswa kelas IV SDN Leminggir Kecamatan Mojosari Kabupaten Mojokerto. Jenis penelitian yang digunakan adalah penelitian eksperimen dengan rancangan Quasi Eksperiment Design. Desain penelitian yang digunakan yaitu Nonequivalent Control Group Design. Populasi dalam penelitian ini adalah siswa kelas IV SDN Leminggir Kecamatan Mojosari Kabupaten Mojokerto. Sampel penelitiannya adalah kelas IV B sebagai kelas eksperimen dan kelas IV A sebagai kelas kontrol. Teknik pengumpulan yang digunakan adalah teknik observasi dan teknik tes. Teknik analisis data yang digunakan adalah uji validitas, uji reliabilitas, uji normalitas dan uji hipotesis. Berdasarkan perhitungan uji hipotesis data post-test kelas eksperimen dan kelas kontrol diperoleh (2,337) > (2,02439) yang berarti diterima dan ditolak dengan kesimpulan yaitu adanya pengaruh metode Outdoor Study terhadap keterampilan menulis puisi siswa kelas IV SDN Leminggir Kecamatan Mojosari Kabupaten Mojokerto. Kata Kunci: metode outdoor study, keterampilan menulis puisi Abstract The purpose of this research is to determine the influence of Outdoor Study method on poetry writing skills in IV grade of Leminggir Elementary School Mojosari District Mojokerto City. The type of this research is experimental research and used Quasi Eksperiment Design. The research design used is Nonequivalent Control Group Design. The population of this research was fourth grade students at Leminggir Elementary SchoolMojosari District Mojokerto City. The research sampel was class IV B as the experimental class and class IV B as the control class. The retrival data techniques is observation and test. The analisys data techniques is validity test, reliability test, normality test, and hypothesis test.Based of the result from hypothesis test on post-test experimental class and control class data obtained (2,337) > (2,02439) which mean accepted and rejected and the conclusion is that there are influence of Outdoor Study method on poetry writing skills in IV grade of Leminggir Elementary School Mojosari District Mojokerto City. Keywords: outdoor study method, poetry writing skills
Effectiveness of Implementation Teams in Enforcing Minimum Service Standards Policies in Provinces and Regencies/Cities Across Papua Firmansyah, Lutfi
Jurnal Indonesia Sosial Sains Vol. 6 No. 2 (2025): Jurnal Indonesia Sosial Sains
Publisher : CV. Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/jiss.v6i2.1615

Abstract

Basic mandatory affairs or better known as Minimum Service Standards are the Government's efforts in realizing community welfare through service indicators that have been determined through policy regulations, namely Education, Health, Public Works, Public Housing, Trantibumlinmas and Social. However, there are still problems in the implementation of the policy because the policy implementing actors are still not optimal in the implementation of coordination which should be represented in the SPM implementation team which is legalized through a Regional Head Decree. Tanah Papua is an object of discussion in the effectiveness of the coordination team because there are still many provinces and districts/cities that have not formed SPM implementation teams, which can be a potential problem in implementing SPM in Tanah Papua. Transaction cost theory analysis is the basis of the research, supported by opinions from Provincial and District/City stakeholders according to factual conditions in Papua. The result of this policy paper is that a strong coordination commitment and reduced sectoral ego will optimally reduce transaction costs in SPM implementation, although transaction costs in coordination cannot be eliminated but can be reduced. The policy recommendations in this paper are that Regional Heads, Deputy Regional Heads and Regional Secretaries as well as Heads of Regional Apparatus Organizations who are members of the SPM implementation team in Papua can formulate SPM policies for the people in their areas.
Review: Potensi Pemanfaatan Sampah Plastik dan Biomassa melalui Proses Pirolisis sebagai Solusi Energi Alternatif dan Pengelolaan Sampah Firmansyah, Lutfi; Mufrodi , Zahrul; Maryudi
Jurnal Teknik: Media Pengembangan Ilmu dan Aplikasi Teknik Vol 24 No 2 (2025): Jurnal Teknik - Media Pengembangan Ilmu dan Aplikasi Teknik
Publisher : Fakultas Teknik - Universitas Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55893/jt.vol24no2.723

Abstract

Ketergantungan terhadap penggunaan bahan bakar fosil memberikan dampak permasalahan diberbagai aspek seperti peningkatan emisi gas rumah kaca dan berkurangnya sumber energi tak terbarukan. Disisi lain isu timbulnya limbah/sampah khususnya limbah plastik dan biomassa menjadi tantangan global. Artikel ini membahas potensi konversi campuran limbah plastik dan biomassa menjadi bahan bakar alternatif menggunakan proses pirolisis. Proses pirolisis menjadi solusi ganda yaitu mengurangi akumulasi produksi limbah sekaligus menghasilkan energi alternatif yang bernilai ekonomis yakni bio-oil, bio-char dan syngas. Dalam implementasi proses pirolisis terdapat beberapa faktor seperti suhu operasi, jenis katalis, teknologi reaktor memiliki pengaruh terhadap hasil pirolisis. Diharapkan dengan pemahaman mendalam terhadap parameter dapat memberikan khasanah pengetahun dan pengembangan proses pirolisis. Sehingga dengan pemilihan teknologi yang tepat, pirolisis dapat menjadi solusi dalam mengatasi krisis energi dan isu lingkungan global.
ANALISA KARAKTERISASI BIO-OIL HASIL PIROLISIS LIMBAH BANNER DAN CAMPURAN DENGAN LIMBAH SERBUK GERGAJI Firmansyah, Lutfi; Mufrodi, Zahrul; Maryudi, Maryudi; Astuti, Erna; Ismanto, Deny
Jurnal Chemurgy Vol 9, No 2 (2025): Jurnal Chemurgy-Desember 2025
Publisher : Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/cmg.v9i2.23550

Abstract

Peningkatan limbah banner berbahan PVC dan serbuk gergaji dari industri kayu menimbulkan masalah lingkungan. Namun timbulan masalah tersebut terdapat potensi sebagai sumber energi alternatif. Penelitian ini bertujuan mengonversi kedua limbah tersebut menjadi bio-oil melalui proses pirolisis. Produk bio-oil kemudian diuji  karakteristik fisik serta kimianya. Proses dilakukan menggunakan jenis reaktor fixed-bed pada temperatur operasi 300–500 °C dengan interval 50°C. Analisis TGA digunakan untuk mempelajari dekomposisi bahan, sedangkan GC–MS untuk mengidentifikasi senyawa penyusun bio-oil.Hasil menunjukkan dekomposisi utama limbah banner terjadi pada 285 °C dan serbuk gergaji pada 338 °C dengan rentang optimum pirolisis antara 300–400 °C. Yield bio-oil menurun dari 22,34% menjadi 1,12% seiring kenaikan suhu, sedangkan syngas meningkat dari 10,47% menjadi 38,44%. Komposisi kimia bergeser dari senyawa ester pada suhu rendah menjadi fenolik dan aromatik kompleks pada suhu tinggi. Kondisi optimum tercapai pada 400 °C dengan densitas 1,07 kg/m³, viskositas 1,15 cP, dan nilai kalor 23,5 MJ/kg.Bahan baku dengan campuran 75% banner dan 25% serbuk gergaji menghasilkan bio-oil lebih stabil dengan dominasi senyawa aromatik oksigenat. Secara keseluruhan, pirolisis limbah banner maupun campuran dengan serbuk gergaji berpotensi sebagai solusi pengelolaan limbah. Baik berjenis plastik maupun biomassa yang memberikan hasil berupa bahan bakar alternatif.
Co-Authors A. Suhandi Dani Gustaman Syarif Erna Astuti Ismanto, Deny Maryudi Maryudi Maryudi Mufrodi , Zahrul Zahrul Mufrodi, Zahrul