International Refereed Journal of Engineering and Science

Atomic Layer Deposition of TiO2 From Tetrakis (Dimethylamino) Titanium And H2O On Commercial-Grade Iron: A Simple Method For Support Preparation
Jose Domingo Gonzalez-Ramirez, Maricela Villicañamendez, Hugo Tiznado- Vazquez, Gabriel Alonso-Nuñez, Jose Apolinar Cortes
Abstract

Full text PDF
Index: 10.183x/A0708010111

This report work describes a titanium dioxide (TiO2) atomic layer deposition (ALD) on a commercial-grade iron substrate from tetrakis (dimethylamino) titanium (TDMAT) and de-ionized water as titanium and oxygen precursors, respectively. This particular substrate was prepared in a short period of time (approximately 20 min) by a simple procedure, which could represent a new and interesting option to elaborate thin films through an ALD process. The TiO2 deposition was studied at the support temperature of 225°C. The number of ALD cycles was varied in the range of 50 cycles to 250 cycles, and the effects of this parameter were investigated. Samples were characterized by XPS, XRD, RS, SEM and AFM analyses in order to scrutinize their composition and microstructure. TiO2 films grew as anatase phase, which was gradually developed with a rising number of ALD cycles. XPS indicated a moderate silicon contamination due to sandpapers used during the substrate preparation, which was similar for all samples. However, the morphology and topography of these layers were clearly determined by the iron support surface. Rough TiO2 films were obtained with RMS roughness of at least 89 nm............

Author Keywords:- TiO2; TDMAT; Atomic layer deposition; Iron support; Wustite; Raman spectroscopy.

e-ISSN: 2319-183X, p-ISSN: 2319-1821 Source Type: Journal Original Language: English
Document Type: Article Number of pages: 11

Control Of Synchronous Electromotor by Voltage Parameters Change in Stator Winding With Constant Excitation Current
Biya Motto Frederic, Tchuidjan Roger, Ndzana Benoît, Tatsa Tchinda Colince
Abstract

Full text PDF
Index: 10.183x/B0708011215

In this paper, we study the control algorithm of electromagnetic torque and rotation speed for a synchronous electromotor with constant excitation current.

Author Keywords:- Synchronous electromotor, Voltage parameters change, excitation current.

e-ISSN: 2319-183X, p-ISSN: 2319-1821 Source Type: Journal Original Language: English
Document Type: Article Number of pages: 04

Quick Chemistry by Microwave
Dr. PallabGayen, Dr. Ashutosh Pal
Abstract

Full text PDF
Index: 10.183x/C0708011619

Microwave chemistry is the science of applying microwave radiation to chemical reactions for quick synthesis and better yield.1,2,3 Microwaves act as high frequency electric fields and will generally heat any material containing mobile electric charges, such as polar molecules in a solvent or conducting ions in a solid. Polar solvents are heated as their component molecules are forced to rotate with the field and lose energy in collisions. Semiconducting and conducting samples heat when ions or electrons within them form an electric current and energy is lost due to the electrical resistance of the material. Microwave heating in the laboratory began to gain wide acceptance following papers in 19864although the use of microwave heating in chemical modification can be traced back to the 1950s. Although occasionally known by such acronyms as MAOS (Microwave-Assisted Organic Synthesis)5MEC (Microwave-Enhanced Chemistry) or MORE synthesis (Microwave-organic Reaction Enhancement), these acronyms have had little acceptance............

Author Keywords:- Quick chemistry, microwave chemistry.

e-ISSN: 2319-183X, p-ISSN: 2319-1821 Source Type: Journal Original Language: English
Document Type: Article Number of pages: 04

Information System KANGO and Track Status Tables
Karel Šotek, Viliam Tavač, Marek Tavač
Abstract

Full text PDF
Index: 10.183x/D0708012024

Standalone module KANGO TTP as a part of IS KANGO was designed for creating, updating and publishing of track status tables. This module uses consistent data description of railway infrastructure provided by another part of IS KANGO called KANGO-Kmen. These data are used by other information systems of Czech railway infrastructure manager (SZDC). KANGO TTP allows to update TTP and meets all the specific TTP agenda requirements in the regular two-week cycle. At the same time it is ready for data communication with external information systems, especially the ETD.

Author Keywords:- KANGO-Kmen, track status table, timetable, editor, database.

e-ISSN: 2319-183X, p-ISSN: 2319-1821 Source Type: Journal Original Language: English
Document Type: Article Number of pages: 05

GIS-based Techniques for Estimating Spatial Distribution of Heavy Metals in Urban Soil: A Case Study in Hoc Mon District, Ho Chi Minh City, Vietnam
Tuan Tran Quang, Tien Yin Chou, Hoang Thanh Van, Mei Hsin Chen, Danh Mon, Luu Hai Tung
Abstract

Full text PDF
Index: 10.183x/E0708012529

Heavy metal concentration in urban soil is one of big problems that contribute directly or indirectly to the general life quality in city areas. Heavy metals can affect to the human health and might cause toxic effects to biological organism. Ho Chi Minh city (HCMC), Vietnam is the home to many industrial activities and is the populous area resulting in many environmental problems. However, there has been no investigation of urban soil pollution in order to monitor, control and manage soil quality in HCMC. This study mainly focuses on determining concentration of metals in soil and applying Geostatistic and GIS techniques to estimate spatial distribution of heavy metal for better understanding their contamination characteristic............

Author Keywords:- Heavy metal concentration, GIS technique, Spatial interpolation, heavy metal mapping, Ordinary Kriging.

e-ISSN: 2319-183X, p-ISSN: 2319-1821 Source Type: Journal Original Language: English
Document Type: Article Number of pages: 05

Volume 7 ~ Issue 8

IRJES Published Within 48 Hrs.

Call for Papers : 24x7 Working

Notification of Acceptance : Within 24 Hours

E-Certificates : Within 04Hours

FOR AUTHORS