Change in the room temperature magnetic property of ZnO upon Mn doping

We present in this paper the changes in the room temperature magnetic property of ZnO on Mn doping prepared using solvo-thermal process. The zero field cooled (ZFC) and field cooled (FC) magnetisation of undoped ZnO showed bifurcation and magnetic hysteresis at room temperature. Upon Mn doping the magnetic hysteresis at room temperature and the bifurcation in ZFC-FC magnetization vanishes. The results seem to indicate that undoped ZnO is ferromagnetic while on the other hand the Mn doped ZnO is not a ferromagnetic system. We observe that on addition of Mn atoms the system shows antiferromagnetism with very giant magnetic moments.Comment: 5 figure

A note on the solution of fuzzy transportation problem using fuzzy linear system

In this paper, we discuss the solution of a fuzzy transportation problem, with fuzzy quantities. The problem is solved in two stages. In the first stage, the fuzzy transportation problem is reduced to crisp system by using the lower and upper bounds of fuzzy quantities. In the second stage, the crisp transportation problems are solved by usual simplex method. The procedure is illustrated with numerical examples

Transition from anticipatory to lag synchronization via complete synchronization in time-delay systems

The existence of anticipatory, complete and lag synchronization in a single system having two different time-delays, that is feedback delay $\tau_1$ and coupling delay $\tau_2$, is identified. The transition from anticipatory to complete synchronization and from complete to lag synchronization as a function of coupling delay $\tau_2$ with suitable stability condition is discussed. The existence of anticipatory and lag synchronization is characterized both by the minimum of similarity function and the transition from on-off intermittency to periodic structure in laminar phase distribution.Comment: 14 Pages and 12 Figure

Secure Data Sharing in Cloud Computing using Revocable Storage Identity- Based Encryption

Nowadays regularly use cloud services in our daily life.There are various services provided by cloud such as a service, Platform as a service, and Infrastructure asa service. The used to keep our data,documents, and files on cloud. The data that store may be Personal, Private, secret data. So must be very sure that whatever the cloud service we use that must be secure. Cloud computing Provides number of services to client over internet. Storage service isone ofthe important services that people used now days for storing data on network so that they can access their data from anywhere and anytime. With the benefit of storage service there is an issue of security. To overcome security problem the proposed system contain two levels of security and to reduce the unwanted storage space de-duplication[1,2] technique is involved. To increase the level of security one technique is a session password.Session passwords can be used only once and every time a new password is generated.To protect the confidentiality of sensitive data while supporting de-duplication[1,2]the convergent encryption technique has been proposed to encrypt the data before outsourcing,Symmetrickey algorithm uses same key for both encryption and decryption.In this paper,I will focus on session based authentication for both encryptions for files and duplication check for reduce space of storage on cloud

Automatic Solar Tracking System and Fault Detection Using Wireless Technology

Renewable energy solutions are becoming increasingly popular. Photovoltaic (solar) systems are but one example. Maximizing power output from a solar system is desirable to increase efficiency. In order to maximize power output from the solar panels, one needs to keep the panels aligned with the sun. As such, a means of tracking the sun is required. This is a far more cost effective solution than purchasing additional solar panels. It has been estimated that the yield from solar panels can be increased by 30 to 60 percent by utilizing a tracking system instead of a stationary array [1]. This project develops an automatic tracking system which will keep the solar panels aligned with the sun in order to maximize efficiency. In this paper we proposed automatic solar tracking system and fault detection using wireless technology as a key to the new era

An evaluation of antibacterial activities of Seidenfia rheedii (Sw.) Szlach.

Global antibiotic resistance by bacteria is becoming an increasing public health concern and the presence of drug-resistance bacteria does not only hamper the effective treatment of infectious diseases, but also increases the cost of treatment. Therefore there is a need to develop alternate antibacterial drugs for the treatment of infectious diseases. One approach involves the search for new therapeutic agents with novel modes of action from medicinal plants. In this study antibacterial activity of aqueous and various organic solvent extracts of Seidenfia rheedii leaf were checked against both gram-positive and gram-negative bacteria. Among them, ethanolic leaf extract was found to possessed significant antibacterial activity against all the test bacteria while aqueous extract did not exhibit any activity against the same organisms. The activity was more pronounced against Bacillus cereus (12 mm), Shigella dysenteriae (9 mm) and Sterptococcus faecalis (8 mm). The results obtained from the present study suggest a new potential application of S. rheedii as an alternate source of antibiotics

Approaches of material selection, alignment and methods of fabrication for natural fiber polymer composites: A review

The recent superiority of the composite materials is cautiously focusing on environmental adoption of natural fiber composites. The major source of the natural fiber materials covered in the globe, especially natural fibers, is plant-based, animal-based and mineral-based. Eco friendly based material can save the environment and recycling of the material is possible, as well as important criteria. Hence engineers ultimately focused on natural fiber polymer matrix materials to save the environment, pollution control, plastic manipulation, etc. The literature work was studied to identify natural fiber material possession. The major goal of the present review was to identify material characterization and appropriate application, mainly offering to enhance mechanical properties, flexural strength, electrical properties, thermal properties etc. The major consequence of the natural fiber is hydrophilic treatment. There is poor interfacial adhesion between the addition/filling substances and poor mechanical characteristics. All of these shortcomings constitute a critical issue. This review presents numerous sorts of  natural and synthetic polymers, natural fibres such as jute, ramie, banana, pineapple leaf fibre, and kenaf, etc.; short and long fibre loading methods, fibre fillers in micro and nanoparticle, American society of testing and materials (ASTM) standard plate dimensions, fabrication methods such as hand lay-up process, spray lay-up process, vacuumed-bag, continuous pultrusion, and pulforming process, etc.; industries and home appliances such as automotive parts, building construction, sports kits, domestic goods, and electronic devices. The review lists various material combinations, fibre loading, fillers, and matrix that can aid in the improvement of material properties and the reduction of failures during mechanical testing of composites.                

Decent Love and Intuition Scenes of Kambaramayanam

Valmiki's epic has a special pride in the unparalleled epics that have ever appeared in the world. It is perfectly appropriate to say that Kambar gave life to all the characters created by Valmiki. Kambar has made the characters go for a walk in the atmosphere without lowering them with his own individuality and changing their character.The real meaning of the epic is "the sin of morality and defeat". It is very special that Kambar did not just emphasize that point in the epic, but also handled the news. When Rama and Sita devi see each other in the mithila scene in Kambaramayana, kambar's poetic beauty is able to understand the joy and suffering that occurred by the mind. When Raman sees Sita, he faints and all that he sees appears to be the form he has seen, and the sight of mayangal, monday and kaman being blamed, and wailing in his eyes, is seen in front of his mind. This article explains such events

Conservation of an endemic medicinal plant, Anaphalis eliptica DC. by employing plant tissue culture technique

The plant species, Anaphalis elliptica DC. (Asteraceae) is a medicinal herb endemic to high hills of Nilgiri Biosphere Reserve, the Western Ghats. The in vitro propagation study of this species by using leaf, node and shoot tip explants, revealed the following results: Among the three explants used, leaf and node responded well for callus and shoot initiations respectively. The leaf explant produced callus effectively (91%) in the MS medium supplemented with BAP and NAA at 2.5 and 0.3 mg/l respectively, whereas the nodal explant produced higher amount of shoots (92%) in the basal medium containing the growth regulator, BAP alone at 3.0 mg/l. The leaf derived callus produced higher (80%) shoot initials and shoot multiplication in the MS medium augmented with BAP and NAA at 3.0 and 0.5mg/l respectively. Similarly, the in vitro nodal derived shoots produced higher shoot multiplication (87%) in MS medium supplemented with BAP at 3.0mg/l. The regenerated shoots of both the explants were successfully rooted on MS medium supplemented with IBA and NAA at 1.0mg/l each. After sequential hardening the leaf callus derived plantlets registered higher survivability rate (80%) in the hardening medium containing decomposed coir waste, perlite and compost in the ratio of 1:1:1 by volume. Similarly, the survivability rate of nodal derived plantlets was higher (84%) in the hardening medium composed by vermicompost and soil in the ratio of 1:1 by volume