Articles

Modeling and Simulation on NOx and N2O Formation in Co-combustion of Low-rank Coal and Palm Kernel Shell Mahidin, Mahidin; Gani, Asri; Khairil, Khairil
Jurnal Rekayasa Kimia & Lingkungan Vol 9, No 2 (2012): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

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Abstract

NOx and N2O emissions from coal combustion are claimed as the major contributors for the acid rain, photochemical smog, green house and ozone depletion problems. Based on the facts, study on those emissions formation is interest topic in the combustion area. In this paper, theoretical study by modeling and simulation on NOx and N2O formation in co-combustion of low-rank coal and palm kernel shell has been done. Combustion model was developed by using the principle of chemical-reaction equilibrium. Simulation on the model in order to evaluate the composition of the flue gas was performed by minimization the Gibbs free energy. The results showed that by introduced of biomass in coal combustion can reduce the NOx concentration in considerably level. Maximum NO level in co-combustion of low-rank coal and palm kernel shell with fuel composition 1:1 is 2,350 ppm, low enough compared to single low-rank coal combustion up to 3,150 ppm. Moreover, N2O is less than 0.25 ppm in all cases.Keywords: low-rank coal, N2O emission, NOx emission, palm kernel shell
A Comparison of Energy Profile between Castilla Leon, Spain and Aceh, Indonesia Mahidin, Mahidin; Khairil, Khairil; Martin, Carmen; Villamanan, Miguel A.; Segovia, Jose J.; Chamorro, Cesar R.
Jurnal Rekayasa Kimia & Lingkungan Vol 7, No 4 (2010): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

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A comparative study on energy production and consumption between Aceh, Indonesia and Castilla León, Spain has been conducted. Analysis was carried out on the statistical data such as population, GDP, energy production and energy consumption. Some interesting results were obtained. An average energy production during 2001 – 2004 in Aceh is up to 28 times of the average energy production in Castilla León; however, the average energy consumption during those four years is only 16.74% of the average energy consumption of Castilla León. Aceh's average GDP from 2001 to 2004 is 3,357.16 million Euros, stands at only 8.15% of Castilla León's average GDP about 41,175.75 million Euros.Keywords: economic growth, final energy consumption, GDP, primary energy production
PENGARUH MODEL PERKULIAHAN GENETIKA DI JURUSAN BIOLOGI FMIPA UM TERHADAP KEMAMPUAN METAKOGNISI MAHASISWA Khairil, Khairil
Jurnal Biologi Edukasi Vol 1, No 2 (2009): Jurnal Biologi Edukasi
Publisher : Jurnal Biologi Edukasi

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Abstract

The aim of this study is to determine the impact of lecture model of Genetics towards students’ metacognition skills based on class category, basic academic skill, and types of subjects. This study was conducted at FMIPA Biology department of UM involving students in education class and non-education class for 2 semester. The instruments used in the research were observation sheets of Genetics lecture, metacognition awareness inventory (MAI), and documents of observation sheet. Anakova with Least Significant Difference (LSD) was used to analyse the data. The result showed that the steps in the lecture model of Genetics comprising instucting reading assessment related to lecture material, composing summary of reading material, setting questions and the answers, and having presentation and discussion. Project-based practical work and classic practical work were used in practical work assessment. Evaluation tools was used based on average score of paper and pencil test and alternative assessment. Students’ metacognition skills were not influenced by class factor (education and non-education, basic academic skill [high or low], and types of Genetics subjects [Genetics I and Genetics II). 
ANALISIS HABITAT GAJAH SUMATERA (Elephas maximus sumatranus) BERDASARKAN Software SMART DI KECAMATAN PEUNARON KABUPATEN ACEH TIMUR Mustafa, Taufan; Abdullah, Abdullah; Khairil, Khairil
Biotik Vol 6, No 1 (2018): JURNAL BIOTIK
Publisher : UIN Ar-Raniry

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Abstract

Penelitian analisis habitat gajah sumatera (Elephas maximus sumatranus) dilakukan di Kecamatan Peunaron Kabupaten Aceh Timur pada bulan September sampai dengan Oktober 2016. Penelitian ini bertujuan untuk mengetahui keberadaan gajah sumatera dan kondisi habitatnya. Metode yang digunakan adalah survei eksploratif deskriptif  dengan mengamati secara langsung pada setiap area lintasan. Data yang telah dikumpulkan dianalisis dengan menggunakan teknik SMART untuk mengetahui keberadaan gajah liar dan kondisi habitat. Hasil penelitian menunjukkan bahwa kawasan habitat yang digunakan oleh gajah memiliki frekwensi habitat yang berbeda-beda, terlihat dari jejak gajah yang ditemukan pada jalur lintasan. Jejak gajah lebih banyak ditemukan dibandingkan dengan jejak satwa liar lainnya. Jejak gajah yang ditemukan didominasi oleh jejak kotoran sebanyak 56%, karena jejak kotoran lebih bertahan lama dari pada jejak tapak. Di kawasan ini, gajah lebih suka bermain di hutan sekunder daripada jenis hutan lainnya, dengan persentase temuan pada jenis hutan tersebut sebanyak 53%, karena hutan sekunder seperti di kawasan areal perkebunan banyak menyediakan tempat bernaung dari sinar matahari dan menyediakan pakan muda. Analisis peta citra satelit dalam kurun waktu 10 tahun menggambarkan kondisi habitat kawasan hutan di Kecamatan Peunaron terus menyusut sebanyak 12.726,02 hektar dari total luas Kecamatan Peunaron sebesar 75.187,45 hektar. Ancaman penyusutan hutan didominasi oleh penebangan kayu olahan sebesar 35%, temuan kayu olahan di lapangan mencapai 346,236 m3. Aktifitas manusia dalam kawasan habitat gajah menjadi faktor pemicu terjadinya konflik satwa tersebut dengan manusia.
PENERAPAN MODEL PEMBELAJARAN KOOPERATIF TIPE TEAM GAMES TOURNAMENT (TGT) BERBASIS PRAKTIKUM TERHADAP PENGUASAAN KONSEP SISTEM PENCERNAAN MANUSIA DI SMA NEGERI 1 SIGLI Rosdiani, Rosdiani; Khairil, Khairil; Nurmaliah, Cut
Jurnal Biologi Edukasi Vol 5, No 2 (2013): Jurnal Biologi Edukasi
Publisher : Jurnal Biologi Edukasi

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Penelitian ini bertujuan untuk mengetahui pengaruh model pembelajaran kooperatif tipe TGT terhadap penguasaan konsep sistem pencernaan manusia di SMA Negeri I Sigli. Metode yang digunakan adalah metode eksperimen dengan rancangan Pretest-postest Control Group Design. Populasi penelitian adalah  seluruh siswa kelas XI IPA SMA Negeri I Sigli semester dua sebanyak 8 kelas dengan jumlah siswa 240 orang, sedangkan sampel dalam penelitian ini diambil secara acak atau random sampling sebanyak 60 siswa yang terdiri dari 30 siswa kelas XI-IPA5 sebagai kelas eksperimen dan 30 orang siswa kelas XI-IPA6 sebagai kelas kontrol. Pembelajaran kelas eksperimen diajarkan dengan menggunakan model pembelajaran kooperatif tipe TGT berbasis praktikum, sedangkan kelas kontrol diajarkan dengan model pembelajaran kooperatif tipe TGT tanpa praktikum. Teknik analisis data dilakukan dengan uji t dengan bantuan program SPSS 16.0 for windows. Hasil penelitian menunjukkan bahwa terjadi perbedaan yang signifikan penguasaan konsep terhadap siswa yang diajarkan melalui model pembelajaran TGT berbasis praktikum dengan siswa yang diajarkan dengan model pembelajaran kooperatif tipe TGT tanpa praktikum, dengan perbedaan keduanya pada taraf P < 0,05, t hitung = 7,570 > t tabel = 2,000  untuk penguasaan konsep. Dengan demikian, terdapat perbedaan yang signifikan penerapan model pembelajaran kooperatif tipe TGT berbasis praktikum terhadap penguasaan konsep siswa pada konsep sistem pencernaan manusia.
Uji Performansi Mesin Yanmar TS 50 Menggunakan Bahan Bakar Biodiesel dari Minyak Kepayang (Pangium Edule) Turmizi, Turmizi; Khairil, Khairil; Thalib, Sulaiman
Jurnal Teknik Mesin Unsyiah Vol 2, No 1 (2014)
Publisher : Jurnal Teknik Mesin Unsyiah

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Fruit Football is a type of plant that is widely available in Aceh and is not utilized by the community. This research will be studied in experiments of fruit fooball as biofuel in diesel engines. Diesel engines are used in this test is a single cylinder four stroke engine water-cooled Yanmar brand, type TS 50 with specs: Maximum Power 5 HP, maximum rotation 2400 rpm, maximum torque 2.29 kg.m at 1600 rpm and compression ratio 17.9: 1. Performance testing is done with a diesel engine intended to determine the amount of power generated, the level of fuel consumption, specific fuel consumption and thermal efficiency. Testing is done with two variations of biodiesel fuel that B-10 and B-20 as well as diesel fuel for comparison. The results obtained from this study is that the power generated from diesel fuel is greater than the other two fuels, while more efficient fuel consumption B-20 followed by B-10 and diesel fuel. Specific fuel consumption results are varied while the higher thermal efficiencies generated by the B-20 of the B-10 and diesel fuel at high speed.
Physical Characterization and Desulfurization of Biobriquette Using Calcium-Based Adsorbent Mahidin, Mahidin; Gani, Asri; Khairil, Khairil
Makara Journal of Technology Vol 15, No 2 (2011)
Publisher : Directorate of Research and Community Services, Universitas Indonesia

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Combustion of coal and co-combustion of their co-fuel contribute to gas emissions. Among the gas emissions are SOx, NOx, CO and CO2. Introduction of calcium based adsorbent is addressed to absorb SO2 that release to the atmosphere during the combustion process. Objective of the research is at first to observe the physical characteristics of biobriquettes as a function of briquette compositions (coal to palm kernel shell ratios) and Ca/S ratios (Ca in adsorbent and S in briquette) using a natural adsorbent (shellfish waste). The second objective is to investigate desulfurization characteristics as a function of Ca/S ratios and desulfurization temperatures at coal to palm kernel shell ratio of 90:10 (wt %). Ratios of coal to palm kernel shell in this study are 90:10, 80:20, 70:30, 60:40 and 50:50; and Ca/S ratios are 1:1, 1.25:1, 1.5:1, 1.75:1 and 2:1. Binding agent used is the mixture of Jatropha curcas seeds and starch as much as 10% (wt). It was found that introducing the palm kernel shell and adsorbents in the coal briquette affect the water resistant and compressive strength. The highest water resistance and compressive strength were 5,165 second and 34 kg/cm2, respectively. The lowest SO2 level found in this study was 1 ppm for all Ca/S ratios, except for 1:1.
Kaji Eksperimental Pengaruh Fase Operasi Unit Tungku Garam Semi Modern Terhadap Prestasinya Mirza, Mirza; Khairil, Khairil; Maulana, M. Ilham
Jurnal Teknik Mesin Unsyiah Vol 4, No 1 (2016)
Publisher : Jurnal Teknik Mesin Unsyiah

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Heating furnace which has been used by farmers to boil salt feed water is a traditional wood-fired furnance that is very simple and very inefficient. Researchers have made several modifications to the furnace unit multi-pot configuration that can utilize waste heat in order to improve the efficiency of the furnace. Potential waste heat of exhaust gas can be used as preheater. The methodology used to asses the performance on the furnace in water boiling test method operating condition of the cold start, hot start, and simmer. The data obtained then analyzed, the result showed that the burning rate and fire power that occurred during the cooking procces of the operation conditions of the cold start, hot start, and simmer increase, but the thermal efficiency decrease. This indicates that increasing of combustion efficiency has not been able to be utilized to the maximum heat. Value of the thermal efficiency of the furnace is affected by the value of useful energy to heat the water in the pot and the amount of energy entry/energy of combustion.
STRENGTHENING LOCAL CULTURE AWARENESS IN TEACHING WRITING; A CASE STUDY AT MUHAMMADIYAH UNIVERSITY OF PAREPARE A, Evi Salasiah; Khairil, Khairil
Elite English and Literature Journal Vol 3, No 01 (2016)
Publisher : UIN Alauddin Makassar

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AbstractLocal culture content approach in education has long been discussed and there are still some arguments on its position in education. Regardless its issues, as a teacher I believed that local culture has significant position in education. Therefore, in my teaching, I always attach culture value in it as a shape of my awareness toward it. This study based on a personal experience in teaching writing for beginner students at English department of Muhammadiyah University of Parepare. The study explores the interference of local culture knowledge in affecting students’ idea forming in class of writing. The participant of the study was the 2nd semester students; class A and B in 2012/2013. The study design applied was case study. It revealed in the study that the use of local culture based material in writing can ease students in mapping their writing ideas as well as reinforcing their awareness toward their local culture. Students enjoyed writing as the material given is familiar to them while at the same time they can strengthen their local culture awareness. Also reinforcing local culture knowledge in teaching English can help widen student’s knowledge on writing.AbstrakPenguatan Budaya Lokal dalam Pengajaran Writing; Suatu Studi Kasus di Universitas Muhammadiyah Parepare. Pendekatan konten budaya lokal dalam pendidikan lama telah dibahas dan masih ada beberapa argumen pada posisi dalam pendidikan. Terlepas dari isu-isu yang, sebagai guru, saya percaya bahwa budaya lokal memiliki posisi penting di bidang pendidikan. Oleh karena itu, dalam mengajar saya, saya selalu melampirkan nilai budaya di dalamnya sebagai bentuk kesadaran saya ke arah itu. Studi ini didasarkan pada pengalaman pribadi dalam mengajar menulis untuk pemula siswa di Departemen bahasa Inggris dari Universitas Muhammadiyah kota Pare. Studi mengeksplorasi gangguan pengetahuan budaya lokal dalam mempengaruhi siswa ide membentuk di kelas menulis. Peserta studi adalah mahasiswa semester 2; kelas A dan B di 2012/2013. Desain studi yang diterapkan pada studi kasus. Itu mengungkapkan dalam studi bahwa penggunaan bahan budaya lokal dalam menulis dapat memudahkan siswa dalam pemetaan ide-ide menulis mereka serta memperkuat kesadaran mereka terhadap budaya lokal mereka. Siswa menikmati menulis sebagai materi yang diberikan akrab bagi mereka sementara pada saat yang sama mereka dapat memperkuat kesadaran budaya lokal mereka. Juga memperkuat pengetahuan budaya lokal dalam mengajar bahasa Inggris dapat membantu memperluas pengetahuan siswa menulis.
KETERBACAAN WACANA DALAM BUKU TEKS BAHASA INDONESIA “EKSPRESI DIRI DAN AKADEMIK” CETAKAN KEDUA MELALUI CLOZE TEST SISWA KELAS X SMAN 1 MAKASSAR Khairil, Khairil; Salam, Slam; Junus, Andi Fatimah
RETORIKA: Jurnal Bahasa, Sastra, dan Pengajarannya Vol 9, No 1 (2016)
Publisher : Universitas Negeri Makassar

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Abstract

Abstract. The Readability of the Indonesian Textbook Discourse "Ekspresi Diri dan Akademik" Second Edition Using Cloze Test Methode On Grade X SMAN 1 Makassar. This research aimed to describe the readability of discourse in the Indonesian textbook "Ekspresi Diri dan Akademik" Second Edition on grade X SMAN 1 Makassar. The method used in this research is a quantitative survey methods that describe the readability level of the Indonesia textbook "Ekspresi Diri dan Akademik" Second Edition on grade X at SMAN 1 Makassar. The population of this research was all students of grade X at SMAN 1 Makassar. Sampling on this population was selected by using cluster random sampling. The sample in this research there were two classes, X MIA 5 and X IIS 3. Data collection techniques in this research is the cloze test. Data obtained using the formula cloze test. The results showed that out of the eight tested discourse to the students there are six discourse that is at the readability level independent/easy. There is a discourse belonging to the category of reading level instructional/medium. Average readability level was 68% overall discourse in the category reading level independent/easy, indicating that the level of discourse is very high readability. Results like that makes the discourse in the Indonesian Textbooks "Ekspresi Diri dan Akademik" Second Edition on grade X published by the Ministry of Education and Culture is not good enough to be used as teaching materials.