Fabrication of Porous Gallium Nitride by Photoelectrochemical Etching Method (Penerbit USM)

Fabrication of Porous Gallium Nitride by Photoelectrochemical Etching Method (Penerbit USM)
Author: Cheah Sook Fong
Publisher: Penerbit USM
Total Pages: 100
Release: 2017
Genre: Science
ISBN: 9674611231

Photoelectrochemical (PEC) etching is a simple and inexpensive wet etching approach that is widely used to fabricate porous gallium nitride (GaN) thin films. However, many fundamental issues on the etching mechanism and the optical response of the fabricated porous structure still remain unclear. In this book, PEC etched porous GaN thin films with a variety of morphologies such as circular, hexagonal, leaf like-, and honeycomb-like patterns were described in detail. The effects of semiconductor types, etching voltage and etching duration on the surface morphology and the optical response of the fabricated porous structure were discussed. Attenuated total reflection method which is very sensitive to the surface layer of the porous GaN was applied to extract the carrier concentration, porosity, and layer thicknesses or the porous layer. Through this book, a better understanding of the PEC etching of the porous GaN can be obtained.

Photoelectrochemical Etching of GaN for High Quality Optical Devices

Photoelectrochemical Etching of GaN for High Quality Optical Devices
Author: Adele C. Tamboli
Publisher:
Total Pages: 366
Release: 2009
Genre:
ISBN: 9781109329988

Gallium nitride has become an important semiconductor material for a variety of device applications, including light emitting diodes (LEDs), lasers, and transistors. One of the main challenges in GaN device fabrication is the chemical stability of GaN which leads to a lack of wet etching techniques. Instead, dry etching is used almost exclusively, leading to ion damage and poor selectivity between different layers. In this dissertation, we discuss photoelectrochemical (PEC) etching, a photoassisted wet etch technique that can be used to etch GaN and its alloys. We develop new aspects of this technique to extend its applicability to a larger variety of devices and use the technique to fabricate a few optical devices, including microdisk lasers.

Elementary Estimating For Building Works (Penerbit USM)

Elementary Estimating For Building Works (Penerbit USM)
Author: Mastura Jaafar
Publisher: Penerbit USM
Total Pages: 72
Release:
Genre: Architecture
ISBN: 9838616605

Accurately forecasting the building works is vital to the survival of any business or organization. Building consists of many elements that need to be properly priced. Building estimation is useful for owner and consultant to determine the project scope; while for contractor it is normally used for bidding or tendering process. This book provides a simple guideline in doing elementary estimation of building works. It consists of 12 chapters giving example calculations of various building elements covering from excavation and earthwork until rainwater disposal system. Besides students in the construction environment, this book is also relevant for practitioners in the construction related industries such as building contractors, subcontractors, consultants or clients and also individual who are looking for knowledge related to building costing. Globalization era in higher education system and a great demand on construction related programmes in Malaysia has contributed to the publication of this book. Thus, this book is purposely written in English for the benefit of local and international students. Universiti Sains Malaysia, Penerbit Universiti Sains Malaysia

Communicating Sustainability

Communicating Sustainability
Author: United Nations Environment Programme
Publisher: UNEP/Earthprint
Total Pages: 68
Release: 2005
Genre: Science
ISBN: 9280725807

"This guide shows how the power of communication can be harnessed for achieving the goal of promoting more sustainable lifestyles. It is designed to be read by local and national government authorities, and everyone else who wants to develop and implement public awareness campaigns on these issues."--Publisher website.

Education and Gender Equality

Education and Gender Equality
Author: Julia Wrigley
Publisher: Routledge
Total Pages: 278
Release: 2003-12-16
Genre: Education
ISBN: 1135427232

First Published in 1992. This book grew out of a special issue of the journal Sociology of Education. There is no simple relation between education and gender equality. As with social class relations, schools both reinforce subordination and create new possibilities for liberation, and these contradictions occur at every level and in every aspect of education. Schools are sites of pervasive gender socialization, but they offer girls a chance to use their brains and develop their skills. To explore education and gender is to examine the bridge between the public world of occupations and the private world of families. Schools link the families from which young children come and the sex- and race-segregated occupational worlds to which they are sent. Because schools link public and private worlds, help to form consciousness, and structure inequalities, there are many ways to look at gender and education. In this book, the chapters break into four major topic areas. The first section analyzes gender and education from a comparative and historical perspective, the second section on ‘Diversity, Social Control, and Resistance in Classrooms’, third section, on ‘Gender and Knowledge’ and the final section on ‘families and school’.

Molecular Docking and Molecular Dynamics

Molecular Docking and Molecular Dynamics
Author: Amalia Stefaniu
Publisher: BoD – Books on Demand
Total Pages: 102
Release: 2019-12-18
Genre: Medical
ISBN: 1789840910

This book clearly explains the principles of in silico tools of molecular docking and molecular dynamics. It provides examples of algorithms and procedures proposed by different software programs for visualizing and identifying potential interactions in complexes of biochemical interest. The book is structured in six chapters, each of which discusses different molecular simulation methodologies and provides concrete examples of complexes interactions. In each chapter authors give an overview of the treated subject, a description of the methodologies used, and a discussion of the results. The authors describe computational ways to achieve a rational design of bioactive compounds with various therapeutic applications, including antitumoral agents, antitubercular drugs, nonsteroidal anti-inflammatory drugs, and radiopharmaceuticals.