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Publikasi Penelitian Dosen

Kejahatan Korporasi Dalam Pencemaran Lintas Batas Negara : Studi Pencemaran Kabut Asap Kebakaran Hutan di Indonesia
Abstrak

Corporate now have been become one of the important actors in environmental sustainability. Not only in the local level, the large the corporate in multinational corporation already touched the level of transnational pollution. Haze pollution that occur almost every years in the ASEAN region nowadays became a disaster that must be carried by Indonesia. For follow up this problem, in ASEAN context already have regional agreement was called ASEAN Agreement on Transboundary Haze Pollution. This paper try to attempts the other side of forest fire in Indonesia, especially regarding about the role of corporations in the form of cross-border pollution. 

Penulis : DENI BRAM, DR. S.H. M.H. [PDF File] didownload : 82 x

Kajian Social Marketing Pada Isu Komunikasi Lingkungan Dalam Pembangunan Berkelanjutan
Abstrak
Penulis : ANNA AGUSTINA , M.Si [PDF File] didownload : 44 x

THE EFFECT OF HUMIDITY CONDUCTEN ON THE QUALITY OF LOUDSPEAKER SOUND AN EXPERIMENTAL STUDY
Abstrak

The Effect of Humidify was Conducted the Quality of SoundLoudspeaker: An Experinmental Study

Budiady*).*SeprianSyah

*). Department of Industrial Engineering, Faculty of Engineering,

University of Pancasila

Jl. SrengsengSawah, Jagakarsa, PasarMinggu, Jakarta, Indonesia

Phone:+6285880324080, Fax:+62217270128

*Email:e.budiady@gmail.com & bud@univpancasila.ac.id

 

Abstract - This study the affects of humidity  was conducted to know the quality of conventional membranes and a biomembrane in humid air. In normal air condition, a biomembrane has clearer sound quality than conventional membranes done. In humid air, the air has a lot of water vapor.  Therefore, the humidity affects the membrane quality of not only conventional membranes but also biomembranes. Conventional membranes are made of cellulose fiber (paper), aluminum and polypropylene (plastics).The method of making biomembrane from nata de soya products utilizes hot press nata de soya to produce a paper-like product. This biomembrane paper is utilised to assemble a loudspeaker on the conical section. Then, this biomembrane paper is constructed by assembling loudspeaker holders, such as, winding wire, magnet, coil and the holder of the membrane. Once installed on the loudspeaker, the biomembrane is ready for the tests with an oscilloscope.The tests were conducted in different air circumtances: normal and humid. The tests were conducted by attaching a receiver on conventional membranes as well as the biomembrane. There would be two different results due to the conditions of the air: normal and humid. The results of the tests are in the form of the voltages needed to vibrate the membranes on the speaker cone (diaphragm).The results of the research showed that the voltages needed in normal air are lower than those in humid air. In normal condition, the voltage needed to vibrate paper membrane at 200 Hertz was 24 milivolt compared to 36 milivolt in humid air. The quality of the sound in humid air was also lower than betwen in normal air. The voltage need to vibrate aluminum at 200 Hertz was 52 milivolt in normal air compared to 56 milivolt in humid air. To vibrate plastic at 200 Hertz in normal air, the voltage needed was 20 milivolt compared to 28 milivolt in humid air. Finally, the voltage needed to vibrate biomembrane at 200 Hertz in normal air was 34 milivolt and 32 milivolt in humid air. The last result showed that the biomembrane is more stable in both normal and humid air.

Keywords: sound quality,  intensity, biomembrane, oscilloscope,hydrophobic, hydrophilic.

Penulis : BUDIADY , Ir.,MT [PDF File] didownload : 50 x

ANALISIS BIOMEMBRAN LOUDSPEAKER PENGGANTI MEMBRAN KONVENSIONAL
Abstrak

ANALISIS BIOMEMBRAN LOUDSPEAKER

PENGGANTI MEMBRAN KONVENSIONAL

 

Penelitian ini adalah penelitian tentang pemakaian biomembran yang terbuat dari hasil fermentasi limbah air tahu (whey tahu) untuk membran loudspeaker. Hasil fermentasi berupa nata de soya menjadi kertas melalui proses pengeringan digunakan untuk membran loudspeaker. Biasanya membran loudspeaker konvensional terbuat dari kertas, aluminium, dan plastik. Pengujian akustik organoleptik (melalui pendengaran) ternyata hasil suara yang berasal dari loudspeaker berbahan biomembran , lebih murni, merata, jelas, tidak berdengung sehingga tidak terdengar adanya noise dibandingkan dengan membran loudspeaker berbahan kertas, aluminium dan plastik. Masalah akustik dapat dianalisa dengan menggunakan lima faktor yakni : sumber suara, kecepatan perambatan suara, penerimaan suara, intensitas suara dan frekuensi. Alat ukur yang digunakan dalam penelitian ini adalah decibel meter. Dengan menggunakan decibel meter, hasil yang diperoleh dalam satuan intensitas decibel (dB) melalui sumber suara yang terhubung ke masing-masing loudspeaker dan diuji secara bergantian didalam ruangan kedap suara dan temperature ruangan 20oC, volume sumber suara dengan frekuensi 50 kHz, jarak sumber suara kealat ukur 1 meter, dan kecepatan perambatan suara rataan 340 m/detik. Hasilnya intensitas suara yang berasal dari loudspeaker berbahan biomembran memiliki rataan high decibel 93,9 dB dan rataan low decibel 72,05 dB. Dibandingkan dengan membran loudspeaker berbahan konvensional , yakni : aluminium memiliki rataan high decibel 86,8 dB dan rataan low decibel 69,9 dB, plastik rataan high decibel 87,5 dB dan rataan low decibel 70,15 dB, kertas rataan high decibel 87,95 dB dan rataan low decibel 70,4 dB. Hasil penelitian ini dapat disimpulkan bahwa loudspeaker berbahan biomembran memiliki kualitas suara yang lebih baik dibandingkan dengan loudspeaker berbahan konvensional.

 

Kata kunci : biomembran, membrane loudspeaker, intensitas suara, decibel meter

 

Penulis : BUDIADY , Ir.,MT [PDF File] didownload : 47 x

Classification of UO2 Green Pellet Quality using Intelligent Techniques
Abstrak

Classification of UO2 Green Pellet Quality using Intelligent Techniques

 

 

Keywords : Artificial neural networks, adaptive neuro-fuzzy inference system, uranium dioxide pellets, quality classification

 

Modern production facilities are large and higly complex, operate they operate with numerous variables under closed loop control. In the production of green uranium pellets, pellet quality control involves many variables. Therefore, the classification of the quality pellets is important for improving the efficiency of the producyion process. Classification of pellet quality using the conventional graphical method has some drawbacks;for example, the scale of the graph affects the accuracy and ease of use. In this paper, intelligent techniques are used to classify the quality oh the pressurized water reactors (PWRs) green pellets into three categories according to the guidelines in the quality control manual of the experimental fuel elements laboratory of BATAN. Four features are used for classification, namely, height, volume, weight, density and theoretical density of the pellets. A datasets (150 observation) was collected from one lot of compacted UO2 pellets and was used for training and testing of an ANFIS model. Up to 86.27% of the data can be classified correctly using the ANFIS model. Such performance is comparable to that of artificial neural networks. Thus, this model can be applied effectively for the evaluation and classification of pellet quality

 

Penulis : DEDE SUTARYA, DR., ST., MT [PDF File] didownload : 48 x

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