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Steven Anderson
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Decision Sciences, Operations Research & Management Mechanical Engineering

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OPTIMASI DOUBLE BOX SUBWOOFER Steven Anderson; Teng sutrisno
Mechanova Vol 5 (2016): Semester genap 2016-2017
Publisher : Petra Christian University

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Abstract

Jenis audio pada umumnya dibagi menjadi tiga, yatiu Sound Quality (SQ), Sound Quality Loud(SQL), dan Sound Pressure Level. Jenis Sound Quality (SQ) menonjolkan kejernihan, tonal dansuara panggung (staging-imaging) dari speaker di pilar A (bagian depan dekat dashboard).Sound Quality Loud (SQL) hampir sama dengan jenis SQ, perbedaanya terletak di peletakanspeaker. Sound Pressure Level (SPL), jenis audio ini berbeda dengan jenis audio yang lain. SPLhanya menonjolkan tingkat kekerasan (dB) yang dihasilkan dari subwoofer tanpa menilai suaralainnya. Peranan subwoofer dan box-nya memiliki peranan penting pada jenis audio ini.Penulis merancang 6 model Secondary Box Perpendicular Port, Secondary Box In Line Port,Primary Box Perpendicular Port (Sealed Volume), Primary Box Perpendicular Port (PortVolume), Primary Secondary Box Perpendicular Port (Sealed Volume). Hasil data dari pengujiandidapatkan hasil box yang terbaik yaitu Box Primary Secondary Perpendicular Port (PortVolume). Box ini menghasilkan tingkat kekerasan (dB) subwoofer dengan nilai 94,57 dB pada 50Hz. Sedangkan dB terendah ada pada frekuensi 19 Hz dengan nilai 78.04 dB. Rata-Rata dari boxtersebut adalah 83,30 dan mengalami penurunan sebesar 11,19%. Box model ini lebih cocokuntuk digunakan pada kelas SPL. Hal ini dikarenakan box ini dapat menghasilkan dB tertinggidiantara box jenis lainnya.
The Impact of Corporate Governance, Company Size, and Company Age Towards Financial Performances and Company Value (in Indonesia Manufacturing Companies Listed in IDX) Christian Andi Winarto; Steven Anderson
iBuss Management Vol 7, No 3 (2019): iBuss Management
Publisher : iBuss Management

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Public awareness and relevancy of corporate governance have increased significantly given the corporate bribery and fraud as part of agency cost in the last 20 years. However, the number of research studying corporate governance direct effect towards financial performance and company value in Indonesia are lacking. In this research, the researcher intention is to find the effect of corporate governance towards financial performance and company value with company size and company age as control variables of Indonesian manufacturing companies listed in IDX. In this research, financial performance will be measured using Return on Equity while company value will be measured using Tobin’s Q. Corporate governance will be measured using the corporate governance mechanism (Haat, Rahman, and Mahenthiran, 2008) which involves proportion of independent director, quality of director, insider ownership, foreign ownership, debt to asset, and audit quality. The research data collection is done by gathering data from 63 manufacturing companies listed in IDX that has passed the purposive sampling criteria and analyzed using multiple linear regression. The result of this research concludes that corporate governance have no significant effect towards financial performance while debt to asset, and audit quality are found to have significant impact towards company value. Keywords: Corporate Governance, Company Size, Company Age, Return on Equity (ROE), Company Value (Tobin’s Q)
Co-Authors Christian Andi Winarto Teng sutrisno