Pengaruh Kepemimpinan Instruksional Kepala Sekolah Dan Iklim Sekolah Terhadap Sekolah Efektif

Efforts toempowerschoolsbecomeurgenttoimprove the qualityof education. Effectiveschoolis asolutiontoclose thedisparity inthe quality ofour education. Effectiveschoolsneed tobe supportedbythe principalinstructional leadershipandschoolclimate. This research is to knowhowhigh the influenceof the principal\u27sinstructional leadershipandschool climatetowardseffectiveschools. This reseach used asurvey methodwitha quantitativeapproachthroughsimplecorrelationandmultipleregression. The results of the research showedthatthe principalinstructional leadershipstrong enoughtoinfluencethe effective schools, schoolclimateinfluenceis strong enoughtoeffectiveschools, whilethe principalinstructional leadershipandschoolclimatesimultaneouslystrong influence oneffectiveschools

Analisa Peningkatan Sifat Mekanik Material Ring Piston Top Kompresi Yamaha Jupiter Z Dengan Proses Heat Treatment

Terdapat dua produk suku cadang ring piston di pasaran, yaitu ring piston produk keluaran pabrikan resmi (genuine parts) dan ring piston barang kualitas menyerupai barang pabrik resmi disebut kualitas 1 disingkat KW 1. Tetapi dari segi kwalitas KW 1 jauh dari kwalitas piston original. Maka pada penelitian ini, ingin meningkatkan kwalitas KW 1 menyamai piston original dengan proses heat treatment atau perlakuan panas. Tahap awal penelitian untuk mengetahui karakteristik material ring piston berdasarkan. kekerasan, strukturmikro dan komposisi kimia ring piston top kompresi Yamaha Jupiter Z. Tahap kedua pengaruh heat treatment pada ring piston top kompresi KW 1 untuk meningkatkan sifat mekanik. Metode penelitian yaitu komparasi sifat mekanik beberapa ring piston top kompresi Yamaha Jupiter Z yang nantinya akan dianalisa. Adapun variabel bebas yang digunakan dari ring piston Yamaha Jupiter genuine part, KW 1 merk Indopart dan sudah mengalami perlakuan panas, suhu austenisasi 900 °C waktu penahanan 2 jam, media quenching oli SAE 75-90, austempering di dalam tungku suhu 400 °C waktu penahanan divariasikan 1,5, 3 dan 4,5 jam. Sedangkan variabel bebas pengujian yaitu komposisi kimia, kekerasan dan struktur mikro. Hasil pengujian komposisi kimia terjadi perbedaan yang signifikan antara ring piston Yamaha Jupiter Z genuine part, KW 1 merk Indopart dan penahanan 1,5, 3 dan 4,5 jam khususnya unsur besi (Fe) dan karbon (C). Ini berpengaruh terhadap kekerasan dan kekuatan tarik yang semakin tinggi, tetapi keuletan dan ketangguhan semakin rendah. Hasil pengujian struktur mikro menunjukkan bentuk grafit dari beberapa material memiliki perbedaan, baik dalam bentuk maupun ukuran grafit. Ring piston Kw 1, dengan penahanan waktu 4,5 jam kekerasannya meningkat 36,66 % dibanding dengan ring piston tanpa heat treatment, dan masih dibawah nilai kekerasan ring piston genuine part

Properties and Structure of RO‐R2O‐Na2O‐Al2O3‐P2O5 Glasses

The properties and structural features of RO-R20-Na 20-Al203-P205 (R= Mg, Ca, Ba and RO= Li) glasses in the system have been investigated. The properties of those glasses seem to depend on the field strength of the alkali or alkali-earth ions in glasses as in silicate glasses. Infrared (IR) spectroscopy indicates that the glass network is dominated by bridging P-tetrahedral present in glasses with O/P ~ 3.0. The variation in physical properties of the glasses seem to be closely related to the variation in structure of the glasses and could be explained by simple mechanism such as field strength and differences in mass

Pengembangan Model Manajemen Mutu Pendidikan Pada Smk Di Kota Bandung

Penelitian ini dilakukan atas dasar adanya hasil pengamatan ada beberapa lulusan SMK sudah mampu bersaing dengan lulusan pendidikan tinggi, tetapi hal tersebut masih sebagian kecilnya saja dan itupun bagi lulusan yang memang mempunyai daya juang dan kreativitas yang tinggi. Walaupun inovasi-inovasi pembelajaran yang dilakukan sekolah dan daya dukung dari pihak dunia USAha dan industry disinyalir terjadi peningkatan, namun tetap saja menimbulkan permasalahan yang sepertinya mengulang masalah lalu. Model Pengembangan Manajemen Mutu Pendidikan kaitannya dengan efektivitas penyelenggaraan pendidikan SMK di Kota Bandung bertujuan untuk: 1) Memverifikasi dan mendeskripsikan data tentang rencana dan program pendidikan yang dikembangkan dalam upaya meningkatkan mutu dan relevansi pendidikan, 2) Memverifikasi, mendeskripsikan dan memaknai strategi pelaksanaan rencana dan program pendidikan pada SMKN di Kota Bandung, 3) Memverifikasi dan mendeskripsikan pengawasan yang dilaksanakan oleh pimpinan sekolah, dan 4) Memverifikasi upaya-upaya perbaikan guna mewujudkan pendidikan yang bermutu dan relevan dengan kebutuhan dunia industri. Hasil penelitian sementara ini menemukan bahwa secara prinsipnya sekolah sudah mempunyai model manajemen mutu, dengan mengembangkan system penjaminan mutu berbasis pada ISO 9001:2008. Namun, system tersebut baru hanya sebatas pada prosedur dan prasyarat untuk kepentingan akteditasi dan menarik perhatian bagi pengguna jasa pendidikan, belum sepenuhnya menjadi landasan atau dasar dalam menjalankan proses pendidikan yang dapat menghasilkan lulusan sesuai dengan kebutuhan dunia USAha dan industry. Berdasarkan hal tersebut, maka sudah sewajarnya penelitian yang berkaitan dengan pengembangan model manajemen mutu pendidikan di SMK perlu dilakukan, sebagai bahan pertimbangan dan rujukan dalam rangka lebih meningkatkan hasil pendidikan yang bermutu

Kultur Jaringan Cendana (Santalum Album L.) Menggunakan Eksplan Mata Tunas

The research aim is to observe tissue culture method for Sandalwood using node explants. The explants were cultured on Murashige and Skoog (MS) medium solidified with agar and supplemented with varies combination of hormones: BAP (benzyl-amino-purine), NAA (napthalene-acetic-acid), IAA (indole-acetic-acid) and Kinetin (furfuril-amino-purine) for shoot induction, multiplication and rooting. The results of study showed that the medium of MS+1 mg/l BAP+0.01 mg/ lNAA provided a good response for shoot induction of Sandalwood clones number A.III.4.14 at around 85%. The medium of MS+0.5 mg/l BAP+0.01 mg/l NAA provided a good response for shoot multiplication of the clones number A.III.4.14 (number of shoot and shoot elongation). The rooting medium of ½MS+20 mg/l IAA+1 mg/l IAA and 0.01 mg/l NAA resulted rooting percentage across the clones at around 37%. The highest survival rate after acclimatization was found at clone number WS6 at around 56%

The Induction of Shoots, Multiplication, and Rooting of Gyrinops Versteegii (Gilg.) Domke by in Vitro

Gyrinops versteegii (Gilg.) Domke is including one of superior agarwood-producing plants and naturally growing in Eastern Indonesia as Nusa Tenggara and Papua. Indonesia has been trading agarwood products both domestically and overseas which one of them is agarwood produced by G. versteegii. The purpose of this study was to develop an in vitro culture method for mass propagation of G. versteegii. Shoot induction conducted on MS medium supplemented with Benzyl Amino Purine (BAP) 0.7; 1.0; 1.5; and 2.0 mg/l. The multiplication of shoots conducted on MS medium supplemented with the best concentration of hormones Benzyl Amino Purine (BAP) from shoot induction phase. The rooting of shoots conducted on half strength MS medium supplemented with interaction of hormones Napthalene Acetic Acid (NAA) 0.01 mg/l with concentration of hormones Indole-3-Butyric Acid (IBA) 1.0; 2.0; 3.0; and 4.0 mg/l. Epicotyl explant with a given concentration level of the hormones BAP 0.7 mg/l produce the highest rates number of shoots and shoot length compared to other explant respectively 4.8 shoots and 0.41 cm within 6 weeks. The best explant developments in the best medium able to promote the growth of the length and number of shoots are 0.28 shoots and 0.3 cm within 4 weeks. Explants easiest, quickest and most high- sprouting ability as a factor of success in terms of multiplication is epicotyl. The combination treatment of material explant with concentration of BAP only affect to growth of shoots length. The combination treatment of hormone NAA with concentration of hormones IBA has no effect against root formation and growth root length

Induksi Tunas, Multiplikasi dan Perakaran Gyrinops Versteegii (Gilg.) Domke secara In Vitro

Gyrinops versteegii (Gilg.) Domke is including one of superior agarwood-producing plants and naturally growing in Eastern Indonesia as Nusa Tenggara and Papua. Indonesia has been trading agarwood products both domestically and overseas which one of them is agarwood produced by G.versteegii. This study purpose was to develop an in vitro culture method for mass propagation of G. versteegii. Shoot induction conducted on MS medium supplemented with Benzyl Amino Purine (BAP) 0.7; 1.0; 1.5; and 2.0 mg/l. The shoots multiplication conducted on MS medium supplemented with the best concentration of BAP from shoot induction phase. The rooting of shoots conducted on half strength MS medium supplemented with interaction of Napthalene Acetic Acid (NAA) 0.01 mg/l with concentration of Indole-3-Butyric Acid (IBA) 1.0; 2.0; 3.0; and 4.0 mg/l. Epicotyl explant with a given concentration level of BAP 0.7 mg/l produce the highest rates number of shoots and shoot length compared to other explant respectively 4.8 shoots and 0.41 cm within 6 weeks. The best explant developments in the best medium able to promote the growth of the length and number of shoots are 0.28 shoots and 0.3 cm within 4 weeks. Explants easiest, quickest and most high sprouting ability as a factor of success in terms of multiplication is epicotyl. The combination treatment of material explant with concentration of BAP only affect to growth of shoots length. The combination treatment of NAA with concentration of IBA has no effect against root formation and growth rootlength

PENGARUH VARIASI VARIABEL REAKSI PADA PROSES EKSTRAKSI REAKTIF MESOKARP SAWIT UNTUK MENGHASILKAN BIODIESEL

The conventional method for the production of biodiesel needed the oil that is extracted from the biomass before it can be transesterified into fatty acid methyl esters (FAME). Reactive extraction can be used to produce biodiesel with high-yield, low production costs, reduce the reaction time and the use of reagents and co-solvents, making it easier to produce biodiesel. In this study, reactive extraction applied to produce biodiesel from palm fruit mesocarp extracted using dimethyl carbonate as a solvent and reagents, and novozym®435 as a catalyst. Methanol was replaced by dialkyl carbonates, particularly dimethyl carbonate. Dimethyl carbonate can be used as a solvent and as a reagent, so reactive extraction is very easy to apply. The parameters will be study are reaction temperature (50, 60, and 70 °C), reaction time (8, 16, 24 hours), the molar ratio of reactants (50: 1, 60: 1, 70: 1 n/n ), the concentration of novozym® 435 (5%, 10%, 15% wt).The results showed that the highest biodiesel yield can be achivied at conditions temperature of 60 °C, reaction time 24 hours, molar ratio of reactants palm mesocarp to DMC 1:60, and novozym®435 concentration of 10wt%. The results showed that the synthesis of biodiesel via reactive extraction using palm mesocarp as raw material requires a low production cost

Influence of sintering temperature on density, hardness, shrinkage and microstructure of alumina-zirconia cutting tool

The confederation of Alumina (Al2O3) and Zirconia (ZrO2) has emerged as a promising ceramic framework for advanced machine tool applications. The mechanical properties of the Al2O3-ZrO2 cutting tool are critically dependent on its density, hardness, and shrinkage, which are influenced by the powder preparation and sintering processes. The ef ect of sintering temperature on density, hardness, shrinkage, and microstructure of Al2O3-ZrO2 is investigated in this study. Al2O3 powders (80% wt) and ZrO2 powders (20% wt) were combined in a ball mill machine with polyethylene glycol (PEG) added as a binder agent. The samples were compacted using the cold isostatic pressing method at 300 MPa pressure after being pressed using a hydraulic hand press machine at 10 tons pressure. The green compacts were sintered at temperatures ranging from 1500°C to 1700°C, with soaking times ranging from 4 to 6 hours. The results show that as the sintering temperature increased, the density and hardness decreased. When the sintering temperature was set to 1500°C and the soaking time was 6 hours, the maximum hardness and density were recorded at 1321.23HV. Whereas, lowest hardness was recorded at 688.4HV when the sintering temperature was set to 1700°C and the soaking time was 6 hours. The shrinkage increased significantly as the sintering temperature increased, reaching a maximum of 9.95 percent at 1700°C after 4 hours of soaking. Microstructure analysis reveals that grain size increased as sintering temperature increased, with the smallest grain size presented 2 µm at 1500°C and 6 hour