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Hasil Pencarian

Ditemukan 4 dokumen yang sesuai dengan query
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Abstrak :
Comprehensive in scope, this book covers the latest progresses of theories, technologies and applications of LEDs based on III-V semiconductor materials, such as basic material physics, key device issues (homoepitaxy and heteroepitaxy of the materials on different substrates, quantum efficiency and novel structures, and more), packaging, and system integration. The authors describe the latest developments of LEDs with spectra coverage from ultra-violet (UV) to the entire visible light wavelength. The major aspects of LEDs, such as material growth, chip structure, packaging, and reliability are covered, as well as emerging and novel applications beyond the general and conventional lightings. This book, written by leading authorities in the field, is indispensable reading for researchers and students working with semiconductors, optoelectronics, and optics. - Addresses novel LED applications such as LEDs for healthcare and wellbeing, horticulture, and animal breeding; - Editor and chapter authors are global leading experts from the scientific and industry communities, and their latest research findings and achievements are included; - Foreword by Hiroshi Amano, one of the 2014 winners of the Nobel Prize in Physics for his work on light-emitting diodes.
Switzerland: Springer Nature, 2019
e20509158
eBooks  Universitas Indonesia Library
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Matutu, Andi Agung
Abstrak :
Seiring dengan perkembangan kemajuan teknologi, semakin banyak aplikasiaplikasi yang membutuhkan divais dengan kecepatan operasi tinggi. Dioda Schottky sebagai sebuah divais dengan kecepatan operasi tinggi banyak dipakai dalam aplikasi-aplikasi seperti power converter, RF detectors dan mixers. Dioda Schottky yang dipakai sekarang ini masih menggunakan bahan semikonduktor konvensional seperti Silikon sebagai material dasarnya. Pada skripsi ini dilakukan desain dan simulasi sebuah dioda Schottky yang menggunakan Carbon Nanotube (CNT) sebagai pengganti Silikon sebagai material semikonduktor dalam dioda Schottky tersebut. CNT yang digunakan adalah semiconducting CNT dengan chirality tertentu. Setelah dioda Schottky didesain, dilakukan simulasi menggunakan CNTBANDS 2.0 untuk mengetahui parameter-parameter yang digunakan dalam perhitungan dan analisis. Dari hasil perhitungan yang didasarkan pada parameter-parameter yang didapatkan melalui simulasi dengan CNTBANDS 2.0, didapatkan hasil kecepatan operasi dioda Schottky CNT yang mencapai skala terahertz, yaitu sebesar 8.1 THz untuk chirality (7,0) dan 0.42 THz untuk chirality (32,0). Kecepatan operasi dioda Schottky CNT ini bergantung pada parameter chirality dari CNT yang digunakan dalam divais. Dengan pertimbangan penggunaan CNT untuk divais yang ada sekarang ini terutama dari segi diameter maka diambil CNT dengan chirality (26,0) yang memiliki diameter sebesar 2.03 nm sebagai bahan untuk dioda Schottky CNT.
Along with technology development nowadays, more of applications need devices with high operation speed. Schottky diode as a high operation speed device is mainly used in aplications such as power converter, RF detectors and mixers. The current Schottky diode is still using conventional semiconductor material such as Silicon for the material. The goal of this research is to design and simulate a Schottky diode which using Carbon Nanotube (CNT) to replace Silicon as semiconductor material in Schottky diode. The type of CNT which is used in this research is semiconducting CNT with certain chirality. After designing Schottky diode, simulation is performed using CNTBANDS 2.0 to get the parameter of the CNT which is used in calculation and analysis. From the calculation based on the parameters obtained from simulation with CNTBANDS 2.0, we obtain CNT Schottky diode with terahertz scale operation speed, range from 8.1 THz for chirality (7,0) to 0.42 THz for chirality (32,0). The operation speed of CNT Schottky diode depends on chirality of the CNT used in the device. Due to application of CNT in the devices reason especially from the diameter of CNT parameter, we choose CNT with chirality (26,0) that has 2.03 nm of diameter as a material for CNT Schottky diode.
Depok: Fakultas Teknik Universitas Indonesia, 2008
S38396
UI - Skripsi Open  Universitas Indonesia Library
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Yoon, Jeong-Yeol
Abstrak :
As implied in the title of this textbook, Biosensors: From Electric Circuits to Immunosensors , we are going to learn both electric circuitry (in relation to conventional sensors such as temperature sensors) and biosensors (such as antibody-based immunosensors), with equal emphasis on both. The overarching aim is to build an antibody-based immunosensor from scratch. Before we begin this textbook, let us defi ne two important terms: sensors and biosensors. Let us start with sensors. Literally, a sensor is a device used to sense a physical variable, which includes, but is not limited to: temperature, strain, humidity, pressure, mass, light, and voltage. To sense these variables, we need to convert them into a universal and easily accessible signal— usually a voltage . This voltage signal changes continuously with time, and is directly proportional to a corresponding physical variable. A component responsible for this conversion is a transducer . The resulting voltage signal is usually an analog signal. The analog voltage signal is usually transferred to a computer or a microprocessor, which recognizes digital signals only. An analog signal is converted into a series of high and low voltages (i.e., binary numbers), such that a small fl uctuation in the analog signal (i.e., noise) does not affect the overall digital signal. An analog-to-digital converter (A/D converter) performs this conversion. Today, all-in-one type sensors have become very popular. They incorporate a transducer, an A/D converter, a microprocessor, and a small liquid crystal display (LCD) panel. The signal can also be sent to a computer’ s universal serial bus (USB) from an A/D converter.
Switzerland: Springer International Publishing, 2016
e20528402
eBooks  Universitas Indonesia Library
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Teguh Denggano Patiguna
Abstrak :
ABSTRAK
Provinsi DKI Jakarta memiliki potensi yang besar terutama dari segi perekonomian. Berbagai kalangan datang ke DKI Jakarta untuk mencari nafkah. Kesempatan ini dimanfaatkan sebagian kalangan untuk mempromosikan barang atau jasa mereka kepada publik. Namun, promosi tersebut ternyata membuat wajah ibukota tertutupi oleh tiang-tiang reklame. Oleh karena itu, Pemerintah Provinsi DKI Jakarta berupaya melakukan pengalihan reklame papan menjadi reklame LED. Kenyataanya, penyelenggaraan reklame LED masih belum optimal, terutama dari sisi penerimaann pajaknya. Penelitian ini dilakukan di Kota Administrasi Jakarta Selatan. Teori utama yang digunakan adalah teori administrasi perpajakan dan Model 7-S McKinsey. Penelitian ini dilakukan dengan pendekatan post-positivist dengan teknik pengumpulan data menggunakan wawancara mendalam dan studi kepustakaan. Hasil penelitian menyimpulkan bahwa proses administrasi perpajakan telah dilakukan sesuai aturan. Penyelenggaraan reklame LED saat ini memasuki tahap peralihan, sehingga masih dibutuhkan beberapa perbaikan. Kebijakan terkait reklame LED harus dievaluasi kembali agar tidak terlalu membebani wajib pajak. Faktor lain seperti struktur, strategi, sistem, skill, dan staff juga turut berimplikasi pada proses administrasi perpajakan.
ABSTRACT
DKI Jakarta Province has great potential, especially in terms of economy. Various people come to DKI Jakarta to earn a living. This opportunity is used by some circles to promote their goods or services to the public. However, the promotion turned out to make the face of the capital covered by billboards. Therefore, the Provincial Government of DKI Jakarta seeks to change the billboard into LED billboards. In fact, the implementation of LED billboards is still not optimal, especially in terms of tax revenue. This research was conducted in South Jakarta Administration City. The main theory used is the theory of tax administration and 7 S McKinsey Model. This research was conducted with post positivist approach with data collection technique using in depth interview and literature study. The results concluded that the tax administration process has been done according to the rules. The operation of LED billboards is currently entering the transitional phase, so it still needs some improvements. Policies related to LED billboards should be re evaluated in order not to overload the taxpayer. Other factors such as structure, strategy, system, skill, and staff also have implications for the tax administration process.
2017
S69224
UI - Skripsi Membership  Universitas Indonesia Library