Nur Indah Lestari
Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang
Articles
5
Documents
PERBANDINGAN EFISIENSI DETEKTOR SINTILASI ORGANIK MENGGUNAKAN SINTILATOR ANTRASEN DAN NAFTALEN SERTA PENGARUH PENGGUNAAN KONTAK OPTIK TERHADAP EFISIENSI DETEKTOR PADA SPEKTROMETER BETA

YOUNGSTER PHYSICS JOURNAL Vol 4, No 1 (2015): Youngster Physics Journal Januari 2015
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Research has been done to improve the efficiency of the manufacturing scintillator detector  in beta spectrometer. Detector efficiency is influenced by the type of scintillator, so that in this research will compare the efficiency of the detector using different types of organic scintillator. Scintillator used in this study are Anthracene and Naphthalene. In addition to comparing the efficiency of the scintillator, in this research will analyze the influence of the optical contact of silicone oil to the detector efficiency.Research done by pressing stainless steel mold containing the powder scintillator Anthracene and  Naphthalene. Pressure exerted is 86.6 kN / m2. Naphthalene and Anthracene scintillator made some thickness variations, start from 1 mm to 5 mm with a range of 0.5 mm. Then do the enumeration given 137Cs radiation  source on the surface of  the scintillator PMT (Photomultiplier Tube). To determine the effect of optical contact, given a silicone oil  layer between the surface of  the scintillator with PMT.The results of  the research showed that the efficiency of  the detector with Scintillator Anthracene larger than the scintillator Naphthalene. Scintillator detector efficiency with  Anthracene has a value of 99%, while the efficiency of the scintillator Naphthalene is 53.42%. Silicone oil as an optical contact effect on anthracene with thickness of 1 mm, while on the other the thickness of silicone oil had no effect. In Naphthalene, silicone oil effect on all thickness. It was seen from the increase of efficiency.Keyword : beta spectrometer, Detector efficiency, organic scintillator, optical contact of silicone oil

IMPLEMENTASI SCAFFOLDING UNTUK MENGATASI KESALAHAN SISWA DALAM MEMECAHKAN MASALAH LINGKARAN

APOTEMA : Jurnal Program Studi Pendidikan Matematika Vol 1 No 1 (2015): Apotema: Jurnal Program Studi Pendidikan Matematika
Publisher : Penerbit STKIP PGRI Bangkalan

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Abstract

Kemampuan pemecahan masalah merupakan hal penting yang harus dilatihkan kepada siswa. Lev Semyonovich Vygotsky menyatakan bahwa seseorang akan dapat menyelesaikan masalah yang tingkat kesulitannya lebih tinggi dari kemampuan dasarnya, jika mendapat bantuan dari orang yang lebih mampu (scaffolding). Tujuan studi ini mendeskripsikan tingkat kemampuan aktual siswa memecahkan masalah, kesulitan yang dialami siswa, scaffolding yang diberikan untuk mengatasi kesulitan, dan perkembangan tingkat kemampuan aktual siswa dalam memecahkan masalah setelah diberikan scaffolding. Metode studi deskriptif-kualitatif dengan lokasi dan subjek studi adalah 2 orang siswa kelas VIII SMP Sekolah Alam Insan Mulia (SAIM) Surabaya. Pengumpulan data dilakukan dengan tes tertulis dan teknik wawancara. Data dari studi menunjukkan bahwa kesulitan lebih banyak dialami oleh siswa berkemampuan matematika rendah, meskipun tingkat kemampuan aktual siswa berkemampuan rendah berkembang setelah diberikan scaffolding. Siswa berkemampuan rendah membutuhkan waktu yang lebih lama dalam berpikir, mengingat kembali konsep, dan memperbaiki konsep yang salah dalam memecahkan masalah secara mandiri.

THE EFFECT OF GOVERNMENT EDUCATION SPENDING ON ECONOMIC GROWTH THROUGH SCHOOL ENROLLMENT IN INDONESIA

JURNAL INFO ARTHA Vol 3 (2016): Edisi Maret
Publisher : Polytechnic of State Finance STAN

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Abstract

This paper examines the effect of government spending on education on growth as an indirect process through enrollment rate, specifically in Indonesia. Using a panel data set of 26 provinces from 2000 to 2010 and applying fixed effect approach of panel regression, we find that government spending on education has a positive relationship with enrollment with one-year lag; also, the data show that enrollment affect growth significantly. By enacting the chain rule, government spending on education has a positive effect in economic growth indirectly. Together, these findings suggest that raise government spending on education can increase enrollment rate and enhance economic growth. 

Pengaruh Model Pembelajaran dan Kemampuan Berpikir Kreatif Terhadap Hasil Belajar Sejarah Peserta Didik di SMA Negeri 30 Jakarta

Jurnal Pendidikan Sejarah Vol 5 No 1 (2016): JPS - Jurnal Pendidikan Sejarah, Volume 5 Nomor 1 Tahun 2016
Publisher : Program Studi Pendidikan Sejarah Pascasarjana UNJ

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Abstract

This research aims to investigate the influence of instructional models and creative thinking ability toward history learning outcomes of students at SMA Negeri 30 Jakarta. This research is quantitative research using design treatment by level 2x2. The instrument used to assess student’s achievement is in the multiple choice form, while the instrumen used to assess students creative thinking’s ability is in questionnaire form. The result of the research show that: history learning outcomes of students using sinektik learning models are higher than those history learning outcomes of students using cooperative learning tipe group investigation models, here is interaction effect between learning model and creative thinking on history learning outcomes of students, history learning outcomes of students who has high creative thinking and using sinektik learning model are higher than students using cooperative learning tipe grup investigation model, history learning outcomes of students who has creative thinking and using sinektik model are lower than students using the cooperative learning tipe grup investigation models.

PENGARUH PENYEDERHANAAN STRUKTUR TARIF CUKAI SPESIFIK TERHADAP KONSUMSI ROKOK

JURNAL PERSPEKTIF BEA DAN CUKAI Vol 2, No 1
Publisher : Politeknik Keuangan Negara STAN

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Abstract

ABSTRACT:  This study is conducted to estimate the impact of the increase in regular and specific excise rates structure simplification on cigar's consumption through its price. Using data in 2015 and applying random effect model for unbalanced panel data on Sigaret Kretek Mesin-type and Sigaret Kretek Tangan-type of the cigar, this study compares the impact of price increases due to both specific excise rate structure simplification and regular increase on the excise rate in cigar’s consumption. The results indicate that increase in the specific excise rate structure simplification has a lower impact on raising cigar’s prices than regular excise rate increases. Furthermore, the impact of price increases due to the specific excise rate structure simplification is greater in reducing cigar’s consumption than the price increases due to regular excise rate increases. In addition, it is found that the average price of Sigaret Kretek Mesin-type is lower and has an average consumption that is much higher than Sigaret Kretek Tangan-type. Overall, this result suggests that the specific excise rate structure simplification's policy should be continued in order to reduce cigar's consumption.Keywords: specific excise rate structure simplification, cigar’s consumption, random effects modelABSTRAK:  Penelitian ini dilakukan untuk mengetahui pengaruh kenaikan tarif cukai biasa maupun spesifik terhadap konsumsi rokok melalui harga jual ecerannya. Rokok yang digunakan adalah rokok jenis Sigaret Kretek Mesin (SKM) dan Sigaret Kretek Tangan (SKT). Dengan menggunakan data tahun 2015 dan menerapkan random effect pada unbalanced panel data, penelitian ini membandingkan pengaruh kenaikan harga jual eceran akibat penyederhanaan struktur tarif cukai spesifik dan kenaikan tarif cukai biasa terhadap konsumsi rokok. Hasil penelitian menunjukkan bahwa penyederhanaan struktur tarif cukai spesifik berpengaruh lebih rendah terhadap kenaikan harga jual eceran rokok dibandingkan dengan akibat kenaikan tarif biasa. Lebih lanjut, pengaruh kenaikan harga jual eceran akibat penyederhanaan struktur tarif cukai spesifik lebih besar dalam mengurangi konsumsi rokok dibandingkan kenaikan harga jual eceran akibat kenaikan tarif cukai biasa. Selain itu ditemukan bahwa harga jual eceran rata-rata rokok jenis Sigaret Kretek Mesin (SKM) lebih rendah dan mempunyai rata-rata konsumsi yang jauh lebih tinggi dibandingkan rokok jenis Sigaret Kretek Tangan (SKT). Secara menyeluruh, temuan ini menyarankan agar kebijakan penyederhanaan struktur tarif cukai perlu dilanjutkan karena efektif untuk mengurangi konsumsi rokok. Kata kunci: Penyederhanaan struktur tarif cukai spesifik, konsumsi rokok, random effects model.