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Articles by A.K. Misra
Total Records ( 4 ) for A.K. Misra
  P.K. Jain , V.K. Gupta , A.K. Misra , R. Gaur , V. Bajpai and S. Issar
  Fungi are extremely versatile class of organisms comprised mostly of saprophytes, grows on dead organic material. A relatively small number of fungal species have developed a parasitic lifestyle, associated with the ability to recognize and penetrate a specific host, exploit its nutrient reserves, overcome its innate defense responses and cause disease. Many organisms attacked by fungi encompasses evolutionary distinct groups from lower to higher eukaryotes, most prominently plants, insects and mammals, including humans. To cause disease, fungal pathogens rely on an arsenal of pathogenicity and virulence factors, which’s spatially and temporally correct deployment determines the basic pathogenic potential and the extent of infection, respectively. Being a common contaminant and a well-known plant pathogen, Fusarium sp. may cause various infections in humans. Fusarium is one of the emerging causes of opportunistic mycoses to human and animal. Up to date, approximate 15 species had been reported to cause human and animal diseases. Common species includes species are F. Solani (commonest), F. oxysporum, F. verticoides, F. proliferatum and F. anthophilum.
  V.K. Gupta , A.K. Misra , R.K. Gaur , P.K. Jain , D. Gaur and Saroj Sharma
  Guava (Psidium guajava L.) is an important fruit crop of subtropical countries. It is grown almost in all the states of India. It is a hardy crop and is cultivated successfully even in neglected soils and is attacked by a large number of pathogens, mainly fungi. Wilt is the most destructive disease for guava plant in India and losses due to this disease are substantial. Psidium guajava wilt is known to occur from India, Latin America, Malaysia, Pakistan, South Africa, South Asia and Taiwan. Wilt of guava from India was first reported in 1935 from Allahabad. The disease is soil-borne and is difficult to control. Wilt is predominantly caused by the species of Fusarium, of which F. oxysporum is generally the main cause. The other species of Fusarium i.e., Fusarium solani are also dominates in isolation. Since, the disease results in the complete mortality of the affected plants, the loss is total. Although, severe loss is there in the annual crops also, huge monitory losses occur especially in perennial fruit trees as it is a loss of labour of several years. Guava is a crop where this disease is very serious and it can be said that this is the only disease of guava which is threatening guava cultivation in India. It causes monitory as well as nutritional loss. The present communication, deals guava wilt to depict its present status.
  K.K. Mishra , Ashish Tripathi and A.K. Misra
  The role of the examination in the current education system is very important. It helps the faculty to assess the knowledge of students in various subjects. It has a decisive role in building student’s career too. But the problem is that faculties can’t predict the hidden information about the students’ behavior in the examination. Classification methods like Bayesian network, rule mining and decision trees can be used to extract the hidden knowledge about the students behavior. These methods can be applied on the educational data to identify the weak students and can also be used to predict the students’ behavior and performance in the examination. This paper has applied the concept of decision tree algorithm on the students’ first mid-semester Multiple Choice Questions (MCQs) test data to predict their performance in the next mid-semester as well in the final examination. A fully automated Performance Evaluation Tool (PET ) has been proposed in this study for evaluating the behavior and performance of the students while answering MCQs i.e., whether they are confident of their marked answer or only doing guess-work to arrive at the answer. This tool will maintain the status of students in the database on the basis of the way of answering the question. Two parameters have been taken for measuring the behavior of the student i.e., confident and guess-work. It is found that in the study, PET is a result oriented and user friendly software that helps the faculties to predict the number of students who will not perform well in the upcoming lab examination and it helps the faculties to improve and bring out betterment in the result of students.
  Deepa Pal , Prashant Misra , A.K. Misra , Rajiv Manohar and J.P. Shukla
  Temperature variation of dielectric loss, dielectric permittivity, dielectric anisotropy and percentage optical transmittance of nematic liquid crystalline sample B08 and its composite with dye have been reported in the temperature range of 30 to 164°C. The dielectric loss and dielectric permittivity have also been measured with variation of frequency. The dielectric studies have been conducted in the frequency range of 1 kHz to 5 MHZ. The thermodynamical parameters have also been calculated by using the dielectric loss data in the frequency range mentioned above. A comparison of dielectric and optical parameters including transition temperature of pure nematic sample with dye mixed liquid crystal indicates that a significant change take place in these properties due to addition of dye in host liquid crystal.
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