Archives-January 2018

Biofertilzers are substances obtained from living microorganisms with the potential to supply crops with useful nutrients. Commonly used Biofertilizers supply nitrogen and phosphorus, and these nutrients are the most limiting ones in Sub-Saharan African. Nitrogen has a higher leaching capacity and thus more losses are experienced in agriculture than what is up taken by crops for growth while P sources are getting depleted. Despite many soils lacking these elements, the peasant farmers cannot afford their high cost. On the other hand, if supplied in higher amounts, lead to pollution of ground and surface bodies and eutrophication in the water bodies in the catchment areas. Biofertilizers are therefore considered to be eco-friendly and cost effective. These micro-organisms once inoculated in the soil show different modes of action that promote nutrient availability to crops. These mechanisms include; scavenging for nutrients from soil layers, solubilization of some inorganic compounds, and production of growth promoting metabolites, decomposition, and fixation of the free nitrogen from the atmosphere. However, the use of these biofertilizers has different challenges which may contribute for low adoption by farmers. The review therefore seeks to understand mode of application, mechanisms of plant uptake and the reasons that dissuade farmers from adopt these noble techniques.

The main purpose of the study is to find out the influence of the Big Five Personality traits namely, Neuroticism, Agreeableness, Conscientiousness, Extraversion, Openness on Emotional Intelligence and Job Satisfaction. For this purpose a sample size of 536 Executives who are working at a public sector power generating organization functioning in Tamil Nadu state is selected. Simple random sampling technique was used to select the samples. Big Five Personality inventory developed by John and Srivastava (1999); and Emotional Intelligence developed by Abdullah et al. (2013) were used for data collection. The study has found that there are significant relationship between the Big Five Personality Traits, Emotional Intelligence and Job Satisfaction. Suitable managerial implications are given in this study.

Sand inclusion is an important defect in Cast Iron castings. On an average this defect is almost thirty to forty per cent of the total defects occurring in a foundry. Sand inclusion is undesirable since it results in reduction in the strength of the casting and bad finish of the casting surface. More than hundred parameters are responsible for sand inclusion and hence it is difficult to control defect during casting. A detailed Literature review of the previous work mostly on sand inclusion for almost last fifty years is done in this paper to find appropriate parameters for defect formation of sand inclusion. From the literature review it is found that the exact remedy for sand inclusion is not easy. The papers describing different techniques like Quality Function Deployment, cause and effect diagram, Design of Experiments etc. are also referred for finding the appropriate parameters responsible for sand inclusion. Corrective action should be taken on responsible parameters to eliminate the defect and improve quality of ferrous castings.

This paper presents the failure analysis of the turbine blade of a gas turbine engine 9E GE type, installed in a certain type of simple systems consisting of the gas turbine driving an electrical power generator. A non-linear finite element method was utilised to determine the stress state of the blade segment under operating conditions. High stress zones were found at the region of the lower fir-tree slot, where the failure occurred. A computation was also performed with excessive rotational speed. Attention of this study is devoted to the mechanisms of damage of the turbine blade and also the critical high stress areas.

[Ni(L4)2Cl2], were prepared by reacting 2,3,4-trimethoxy benzaldehyde semicarbazone ligands with NiCl2.6H2O. The IR,UV, Mass and 1H NMR spectra of the complexes have been assigned. Thermo gravimetric analysis were also carried out. The data agree quite well with the proposed structures and show that the complexes were finally decomposed to the corresponding ligands. Complexes were screened for antimicrobial activities by the disc diffusion technique using DMSO as solvent. The activity data show that the semicarbazone metal complexes are more potent antimicrobials metal complexes.

Ibopamine is currently used in ophthalmology. This molecule acts on both adrenergic and dopaminergic receptors. The adrenergic receptors are responsible for a marked mydriasis without accommodative paralysis, while the dopaminergic receptors promote the production of aqueous humor. That’s the reason why ibopamine may be useful for diagnostic purposes in ophthalmology. This short communication aims at presenting the most intriguing evidence on ibopamine and discusses the profile of patients who may be best suitable to this molecule.

Over 70% of the photovoltaic (PV) systems are designed with transformers which are galvanic isolations. However, such inverters are big, heavy and expensive with low efficiency. In this work, a transformer-less PV system is introduced. It is smaller, lighter, and cheaper with higher efficiency as compared to the transformer of the same rating. The proposed inverter employs push pull circuit, an H bridge circuit, the oscillating circuit, an automatic changeover dual battery bank and an RF remote control circuit unit. The switching technique of the proposed inverter consists of a pulse width modulation system along with grid synchronization condition. As the suggested method is entirely transformer-less, there is a reduction in transformer loss which tremendously reduces the total harmonic distortion (THD) to even less than1% with an assumption of; inductor is ideal without any internal resistance, the switches and diodes are ideal with the dead line between the switches are neglected. A filtering capacitor provides a nearly constant output current which stabilizes the system rapidly and reduces harmonics generated by the switching circuit. Overall performance of the proposed inverter was simulated with PROTEUS and validated with MATLAB which produced a pure sinusoidal waveform as the output voltage. The proposed inverter minimizes size and increases the inverter efficiency to 90% which can be used in our homes, offices and schools for lightening and charging.

Congenital bridle is a rare cause of inclusion in children. It remains difficult to diagnose and is often only confirmed during surgical exploration. We discuss the literature through the case of a 40-day-old girl admitted to the emergency room for an occlusive syndrome and in whom surgery confirmed this rare entity.

Cystic malformations of the biliary tract are rare congenital conditions estimated at about 1/2,000,000 births. It is a condition that can lead to serious complications such as angiocholitis, chronic pancreatitis, progressive biliary cirrhosis, portal hypertension or biliary lithiasis. Its spontaneous perforation is one of the few complications, first described by Weber in 1934. Reported to us the case of an 18-month-old boy admitted for sub-occlusive syndrome with biliary peritonitis. An ultrasound scan was performed showing abdominal effusion with communicating cystic formation of the biliary tract associated with a sub-capsular effusion of the liver confirmed by a CT scan. The procedure consisted of a peritoneal toilet with a redon drain at the perforation level and a subhepatic drain without excision of the cyst. The patient was readmitted 6 months after this incident for final treatment.

The issue of information security is evolving on a daily basis and the Governments in the world have become e-governments. Which makes it necessary to develop ways to maintain information to protect them from hackers and and protect them from penetration. In this paper we will encrypt the image using two well known matrix analyzers, gsvd and svd, by relying on a complex cryptographic key, an image. The workflow will analyze the image matrix that we want to encrypt and matrix the key image using gsvd analysis.We also analyze the image matrix key using svd analysis. From the resulting matrices of the analyzes we form a new matrix through the process of constructing in a systematic manner and with new values considered large dispersion of the color values of the image matrix that we want to encrypt. This construct we have made will explain it by explaining the algorithm below.The resulting matrix represents the first and most important phase of encryption, a complex coding process that can never be broken. and to reduce the size of the last matrix to a quarter we fold it in a systematic way that can be reversed to retrieve the original values.What distinguishes this algorithm from the rest of the algorithms that preceded it is the readings that appear to the standards of global accuracy especially the encryption time, which did not exceed 1.9 seconds and the decoding time, which did not exceed 0.74 sec it is a very short period of unprecedented.We will make this clear through the tables below.