Vol. 02, No. 08 [August 2016]

In this research, undoped ZnO and doped with cobalt ZnO:Co thin films with different weight percentages of (1, 3, 5,7 )% have been prepared on pre-heated glass substrates up to (400℃) with average thickens (300nm) by using Atmospheric Pressure Chemical Vapor Deposition (APCVD) technique. The effect of Co-doping on structural properties and the ethanol vapor gas sensing has been investigated. The results of XRD showed that the all deposited films are polycrystalline hexagonal structure with a preferred orientation in the (002) direction, the doping with Co does not change crystal structure of ZnO. The increase in the dopant concentration into the ZnO leads to an increase of the crystallite size of the films which is well known causes to increase the gas sensitivity. The effect of operating temperature on performance of the sensor material has been investigated and a choice of optimum temperature was made at around 300 °C.

The availability of information and communication technologies (ICTs) and network-based services offer a number of advantages in today's society, for example e-government, e-commerce, e-education etc. These ICTs and networks are used for storage and transmission of highly sensitive data which is a subject of interest to both authorized and unauthorized users. Hence security is necessary to ensure only authorized users get access to this data. Technological, configuration and policy vulnerabilities are experienced due to the rapid development and complexity of these networks, evolving technology and usage patterns, and changing hacking tactics. Despite the existence of various security mechanisms to secure the networked environments, unauthorized users still find their way into networked environments by exploiting vulnerabilities in networked environments causing serious damages and data loss. This paper performs a review of various networked environments, vulnerabilities, security controls and models with an objective of finding their gaps and suggests taking vulnerability management approach to secure networked environments.
KEYWORDS - control, ICTs, model, network, vulnerability

FLY ASH CONTAINS THE BASIC INGREDIENTS OF CEMENT LIKE SILICA, MAGNESIUM AND CALCIUM. CEMENT INDUSTRIES USE FLY ASH TO IMPROVE THE VOLUME. QUARRY DUST ALSO CONTAINS A SIMILAR PROPERTY OF RIVER SAND. QUARRY DUST IS USED IN CONCRETE TO MINIMIZE THE DEMAND OF RIVER SAND. MAXIMUM EXPLOITATION OF SAND IS TO BE MINIMIZED TO PROTECT THE RIVER BEDS, SHORE STRUCTURES FROM EROSION. TO REDUCE DISPOSAL AND POLLUTION PROBLEMS EMANATING FROM THESE INDUSTRIAL WASTES, IT IS MOST ESSENTIAL TO DEVELOP PROFITABLE BUILDING MATERIALS FROM THEM. INVESTIGATIONS WERE UNDER TAKEN TO PRODUCE LOW COST CONCRETE BY BLENDING IN VARIOUS RATIOS OF HYPO SLUDGE WITH CEMENT. THE CONCRETE COMPOSITION CAN ALSO BE SUITABLE FOR PARTIAL REPLACEMENT (UP TO 60%). THE FLY ASH, QUARRY ROCK DUST CAN BE USED FORM 20% REPLACEMENT OF CEMENT AND FINE AGGREGATE IN CONCRETE. IT WAS CONCENTRATED TO AVOID ENVIRONMENTAL DEGRADATION DUE TO INDUSTRIAL WASTES FORM CEMENT FACTORIES. THE RESULTS WERE ENCOURAGING IN THAT THEY REVEALED THAT CONCRETE OF THE REQUIRED COMPRESSIVE STRENGTH CAN BE PRODUCED. IT IS CONCLUDED THAT A NEW CONSTRUCTION MATERIAL WITH LOW COST CAN BE MADE AVAILABLE
KEYWORDS: FLY ASH, INDUSTRIAL WASTE, LOW COST CONCRETE, QUARRYDUST, RIVER SAND

Bali has an area of 563 666 ha, consists mostly on land with a slope between 0-2% up to 15- 40%. Water is a major requirement for the process of life on the earth, which means there would be no life on this earth if there is no water. Water is an environmental components that are affected by other components. Bad quality of water will cause the environment to be bad. River water flows from upstream to downstream will be discharged into the sea through the mouth of the river (Loloan). The water flowing in a river surface water caused by rain, springs, groundwater and household waste. This study will assess the potential magnitude of surface water in terms of quantity and quality of water for downstream Petanu in Gianyar, and drafting a model of water management in downstream river Petanu for water conservation based environment. This research method uses quantitative research using primary data of water quality and quantity of water in the river downstream of Petanu River compared with secondary data analysis using software RIBASIM. Calculation of length of the river basin area and the main use of Arc. GIS 10. This research obtains Petanu basin area amounted to 96.970 km2, with a length of 46.770 km along the main river. Maximum discharge amounted to 2,819 m3 / sec. Water quality downstream in July 2016 for the BOD was 2.16 mg / L, COD 6.4 mg / L and DO of 4.83 mg / L. Potential Petanu river water downstream of the water quality can meet the water quality standard Class I and of the quantity can be managed to support water conservation in Gianyar Bali Province.
KEYWORDS: downstream rivers, water potential, conservation

In the present scenario of competitiveness, enhancement efforts and the adoption of new technologies is crucial for a company to reach high levels of effectiveness. Online retailing is one such strategy and it is continuing to expand quickly. As Information Technology progresses rapidly, consumers can access the internet more convenient and thus they are more interested in online shopping. Retailers who have effectively used the internet to manage their business operations have been able to discover new ways to handle their inventories and save costs. With powerful inventory control and order management features firms can increase sales and fulfil orders economically. Internet retailers must optimize inventory replenishment decisions to enhance their profits. This paper develops an innovative mathematical model for E-tailing inventory system and provides the optimal values in order to maximize the benefits. A numerical example is provided to illustrate the proposed E-tailing model. Keywords: Consumers, Inventory, Internet, E-tailing, Professional cost, Online shopping, Optimal values.

Global warming is one of the major problem in the world today. Global warming is caused by the environmental pollution. Construction Industries are responsible for environmental pollution as 1 ton production of cements approximately emits one ton of CO2 into the atmosphere. So, there is need to search for alternative to cement. Geopolymer technology is new innovative technology in the world of concrete technology. In Geopolymer Concrete 100 % replacement of cement is possible with another source material which is rich in silica and alumina . Source material is activated with alkaline activators which act as binders . In present investigation molarity of NaOH is varied from 8M, 10M . Na2SiO3 consisiting of Na2O = 15.02%, SiO2 =,34.01% H2O = 50.93% is used. Natural rivner sad having fineness modulus = 3.15 is used as fine aggregate. Combination of Na2Sio3 and NaOH solution is used as alkaline activators. Na2SiO3/NaOH ratio is kept as 1, 1.5,2. Compressive strength of geopolymer concrete is checked .
Keywords: Alkaine Activators , Fly ash, Geopolymer concrete, Na2SiO3 , NaOH

In today's era, the ease of life and simultaneously conservation of energy in most demanding thing. This should be the required contribution for every person for making a better world. In our proposed module we have designed a module which can control maximum four home appliances such as fan, cooler, AC, bulb etc. Via TV remote through Infrared technology. At this stage approximately every person have TV remote at their home and in this paper our purpose and effort is to make maximum digitalization for home appliances. Our proposed module consist mainly two sections TX and RX. Our RX section of proposed module is very efficient and at the same time power consumption is very less. This module can be used efficiently at home, offices, schools, colleges and industries.
Keywords: IR, ATMEGA, TX, RX, NO, NC, COM, PCB, SPP, EDA, CAD, PROTEUS, DIP-TRACE, CIE, EDA.

Optimization & verification of drive shaft using composite material deals with the possibility of simulation of complex parts made from polymer-composite. The main objective of this paper is to review different papers related to material optimization. By reviewing these papers the material optimization & various parameters of drive shaft can be analyzed under static conditions. First part of the contribution is aimed on describing the basis of fiber composites & its behavior under load. Second part will lead to different studies performed in simulations & describes the stress & weight comparisons made from steel, carbon fiber, glass fiber composites. Thus this review help for optimization of material.
Keywords: Fibre composites, carbon fibre

There is a growing interest in utilizing tidal current energy for power generation which has led to extensive research on this source of renewable energy. The work presented in this project aims to study the tidal current energy extraction using a cross-flow turbine. The bi-directional flow of tidal currents is used to drive a uni-directional cross-flow turbine. Thus in present study cross-flow turbine studied is placed in an augmentation channel, having a nozzle and a diffuser. The performance of the device is studied numerically using the commercial ANSYS Fluent code while the model is being build using SOLIDWORKS. The internal flow characteristics of the turbine are studied for various cases. Results of the numerical analysis are presented in terms of pressure contours, streamlines and velocity vectors. A good agreement was observed between literature and present study .A comparative study has been performed by changing the turbine inlet profile from parabolic to invert parabolic in order to study the impact on pressure and velocity change. Moreover a parametric study of variations in TSR ratio and radius of blades is done for their effects on Power coefficient and Turbine Torque. The tip speed ratio was varied from 0.8- 1.4.The analysis from above study can be used for enhancement of performance of cross flow Darrius turbine.
Keywords: Cross flow turbine, SOLIDWORKS, ANSYS Fluent, Parametric Study, Power coefficient , Torque, Performance enhancement

In a current scenario Logarithmic Number System (LNS) is the mostly used words in the field of arithmetic operations. In all arithmetic operations multiplication is most area/power/delay consuming component, but researchers have analyzed that, Logarithmic multiplier using seamless pipelined technique has potential to solve this problem. Hence, this paper gives a detailed and meaningful discussion of the seamless pipelined of LNS, systematic developments of the LNS multiplier architecture design, highlights the research areas, a further possibility of improvements.
Keywords: Arithmetic circuits, logarithmic multiplication, Mitchell method, Operand decomposition, Seamless pipelined.

The study of surface water of Tigris river reach in Mosul city is of particular importance due to the discharge of several effluents from municipal sewage, industries, hospitals, agricultural and urban run-off into the reach which contribute in the pollution of river water. The aim of this study was to analyze some physicochemical water quality parameters such as (pH, Dissolved oxygen, Temperature, Turbidity, Total dissolved solid, Nitrate, Phosphate, BOD5) as well as E.coli bacteria for (17) sites of Tigris river reach in Mosul city, between Rasheedia in the north of the city and Qiara in the south of the city and present the complex water quality data of the river in a form that can easily be understood by the technical and non-technical personnel. To achieve this aim, the National Sanitation Foundation Water Quality Index (NSF WQI) has been applied on the analytical results of the parameters to obtain a single value that was used to rank the river at each of the sampling station. This index was computed for a period of three months between (Dec. 2013- March 2014) and it specifies the appropriate usage category, but it can also reveal the changes occurred at the level of the aquatic ecosystem. The novelty brought to the flowing water quality management consists in the underlining of the value of this index as potential indicator of the ecological state of the rivers. The results of the Water Quality Index showed that river water for all of the stations investigated can be ranked as medium. For public water supply system, this water requires necessary treatment.

In today's unsecured IT world providing security over a network is very important, security plays a vital role as communication happens through internet and it is quite complicated. Unauthorized user may misuse or modify the network content and its configuration. Thus, providing security over the network is the main role of network Engineers. Therefore, providing security to wired and wireless networks are the two main concepts evolving from many decades. Henceforth, guaranteeing the security in communication is the main need of the network system. Therefore, the focus of this paper is to bring out the different categories of network, security standards, and security in wireless network, advantages, and disadvantages of wired and wireless networks. Also this paper gives an insight into Protocol for carrying Authentication for Network Access (PANA).
Keywords: Network, Communication, Protocol, PANA, Wired, Wireless

At present the disposal of waste tyres in becoming a major waste management problem in the world. It is estimated that 1.2 billions of waste tyre rubber produced globally per year. It is estimated that 11% of post consumertyres are exported and 27% are sent to landfill, stockpiled or dumped illegally and only 4% is used for civil engineering projects. Hence efforts have been taken to identify the potential applications of waste tyres in civil engineering projects. In this context, our present study aims to investigate the optimal use of waste tyre rubber as coarse aggregate in concrete composite. M30 grade by replacing 10%, 20% and30% of tyre aggregate with coarse aggregate and compared with regular M30 grade concrete.
KEYWORDS: waste tyres, concrete, compressive strength, tensile strength, flexural strength

In this work we find out suitable settings with which 2D analysis of DarrieusVAWT (Vertical Axis Wind Turbine)can be performed in ANSYS Fluent for acceptable results also this work provides optimum Tip-Speed Ratio for performance optimization. Aerofoil shapes like NACA-0021 & S-1046 were selected for this study. Analysis through various CFD softwares is relatively economical and less time consuming, but results of such software's are greatly influenced by the input parameters like Velocity, Viscosity, Turbulence at input, boundary conditions, etc; also the mathematical models incorporated in these study. Due to input conditions the flow comes out to be fairly turbulent encouraging us to consider Turbulence model widely used in such type of studies, they are k-ε, k-ω & SST (Shear Stress Transport). The outcomes of these three models were compared for both aero-foil profiles focusing on areas like near blades, in rotor domains, in fluid domains, etc. SST model comes out as best among them in terms of predicting variations in fluid and near wall domains. This study will help future VAWT researchers to set fluent solver for quick and acceptable result. Analysis on 2D aerofoil was performed with these settings and compared with experimental results from literatures to check the orientation of this study. Parametic optimization of VAWT under different TSR ratio are done.