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- Maize or Corn (Zea mays L.) is the most important cereal in the world after wheat and rice. It possesses high nutritive value and is important as a coarse grain. In Sri Lanka, this crop has cultivated, around 30,000ha and local consumption is around 200,000mt annually. Further, Maize is an easily grown crop and the cultivation has been popular among farmers as a cost effective crop with limited fertilizers. This Crop earns a reasonable foreign exchange as it is used as infant foods. Maize has a higher leafy mass and higher vegetative growth within shorter period of time than the other monoculture crops. Therefore, like for many other cereal crops, it is worthwhile in studying the environmental impacts due to this plant. Many researchers have shown that soil is the most affected environment due to monoculture plants. But no proper studies on soil quality changes due to this maize crop have been conducted in Sri Lanka
A Virtual Sensor estimates product objective or process conditions using mathematical models rather than and sometimes in conjunction with physical sensors. These mathematical models use other physical sensor readings to calculate the estimated property or condition. Virtual sensor may provide flexibility, cost effective solutions, promote diversity, ensure security and increase manageability.
The fundamental concerns of imbalances in information and communication had been discussed for a longtime globally. The American media scholar Wilbur Schramm (1964) stated that the flow of news among nations is thin, that much attention is given to developed countries and little to less-developed ones, that important events are ignored and reality is distorted. After a long discussion and debate over media representations of the developing world in UNESCO in the late 1970s and early 1980s, a new term was coined as ‘the New World Information and Communication Order (NWICO or NWIO).’ The term was widely used by the MacBride Commission, which was charged with creation of a set of recommendations to make global media representation more equitable.
Wireless ad-hoc sensor networks and routing data in them is a significant research area. The objective of this paper is to examine resource depletion attacks at the routing protocol layer, which attempts to permanently disable network nodes by quickly draining their battery power. This type of attack is called as vampire attack. Vampire attacks are very difficult to detect because they attack the node only by sending protocol-compliant messages.
A chiral Mannich base, [1-(piperidin-1-yl(thiophen-2- yl)methyl)] thiourea (TPPTU)was prepared by treating thiophene-2-carbaldehyde piperidine and thiourea . Using TPPTU as a ligand, metal complexes of Mn(II), Co(II), Ni(II), Cu(II) and Zn(II) were prepared. Both the compound and complexes were characterized by physical methods such as elemental analysis, melting point and TLC and spectral methods such as IR, UV –Visible, 1 H NMR, 13 C NMR and Mass spectral studies. For the complexes, molar conductivity, magnetic susceptibility and thermal studies were also been carried out. In vitro antimicrobial study was carried out for both the compound and complexes.
For Bamboo to become a mainstream material of the building industry, as a material of substance; an up scaled value of its utility and its deliverance is where research energies have to be spent. Resolution of primary technical issues make it even more compelling to focus on why bamboo construction is not popular despite possessing qualities needed for structural members in tension. Prima Facie; more than the structural vulnerability, appearance, fire and insect attack proneness affecting durability; it is the resolution of the issue of finance, the legal status and the detailed implementation strategy, that appear to be of a greater urgency.
In the present paper, we investigate the effects of heat source and radiation on unsteady magneto hydrodynamic free convection flow past an infinite heated vertical plate in a porous medium. The dimensionless governing equations are solved numerically using finite element method. Numerical evaluatation of the analytical results are carried out for different values of dimensionless parameters. The results are presented graphically for velocity, temperature and concentration profiles, and observed that, when the heat source and radiation parameter increases, the velocity and temperature decrease in the velocity.
Wireless sensor networks consist of sensor nodes with radio, processor, memory, battery and sensor hardware. With widespread deployment of these devices one can precisely monitor the environment. Sensor nodes are resource constrained in terms of radio range, processor speed, memory and power. WSNs are mostly unguarded and the wireless medium is broadcast. This makes them more vulnerable to attacks. Without proper security measures, an enemy can launch various kinds of attacks in hostile environments. These attacks can disrupt the normal working of WSNs and can defeat the purpose of their deployment. Therefore security is an important aspect of these networks. WSNs are often deployed to monitor important emergency events, such as forest fire and battlefield monitoring. System Monitoring Modules (SMM) should be integrated with Intrusion Detection Modules (IDM).
Sign language: a natural, linguistically complete and a primary medium for the humans to interact. Nowadays, this language is prevalent amongst the deaf, dumb or blind individuals. However, with the conventional sign language not known to the signers, it adversely affects their interpersonal relationships in the society. There is a need of much more sophisticated method than communication through interpreters or writing. Our aim is to design a system in which sensor glove is used to capture the signs of the American Sign Language (ASL) and translate them to English displayed on a LCD.
Due to the wide range of application of Wireless Sensor Networks (WSN) the past few years have witnessed the potential use of it and also become a hot research area now a days. One the main degradation of WSN is that sensor nodes are battery powered and deployed in harsh environment so it is not possible to recharge or replace the batteries all the time the node fails or dead. WSN are used in various applications like environment monitoring, health care, military, industrial control units and in various other environments. Routing protocols developed for various other adhoc networks such as MANET, VANET etc can’t apply directly in WSN due to energy constrains of nodes. It is proved that sensor nodes require much energy to transmit data rather than sensing thus routing protocol developed for WSN should be efficient so that the network lifetime can be prolonged. In this paper, a survey on various Clustering routing protocols has been done indicating their merits