Comparative Study of New and Traditional Estimators of a New Lifetime Model

In this article, we have studied the behavior of estimators of parameter of a new lifetime model, suggested by Maurya et al. (2016), obtained by using methods of moments, maximum likelihood, maximum product spacing, least squares, weighted least squares, percentile, Cramer-von-Mises, Anderson-Darling and Right-tailed Anderson-Darling. Comparison of the estimators has been done on the basis of their mean square errors, biases, absolute and maximum absolute differences between empirical and estimated distribution function and a newly proposed criterion. We have also obtained the asymptomatic confidence interval and associated coverage probability for the parameter

Study of ground state phases for spin-1/2 Falicov-Kimball model on a triangular lattice

The spin-dependent Falicov-Kimball model (FKM) is studied on a triangular lattice using numerical diagonalization technique and Monte-Carlo simulation algorithm. Magnetic properties have been explored for different values of parameters: on-site Coulomb correlation $U$, exchange interaction $J$ and filling of electrons. We have found that the ground state configurations exhibit long range Ne\`el order, ferromagnetism or a mixture of both as $J$ is varied. The magnetic moments of itinerant ($d$) and localized ($f$) electrons are also studied. For the one-fourth filling case we found no magnetic moment from $d$- and $f$-electrons for $U$ less than a critical value.Comment: 6 pages, 8 figure

Does the Type of Records Affect the Estimates of the Parameters?

The maximum likelihood estimation of the unknown parameters of inverse Rayleigh and exponential distributions are discussed based on lower and upper records. The aim is to study the effect of the type of records on the behavior of the corresponding estimators. Mean squared errors are calculated through simulation to study the behavior of the estimators. The results shall be of interest to those situations where the data can be obtained in the form of either of the two types of records and the experimenter must decide between these two for estimation of the unknown parameters of the distribution

A New Right-Skewed Upside Down Bathtub Shaped Heavy-tailed Distribution and its Applications

A one parameter right skewed, upside down bathtub type, heavy-tailed distribution is derived. Various statistical properties and maximum likelihood approaches for estimation purpose are studied. Five different real data sets with four different models are considered to illustrate the suitability of the proposed model

Analytical study of adolescent pregnancies at a tertiary care centre

Background: According to World Health Organization, about 16 million girls aged 15 to 19 and some 1 million girls under the age of 15 give birth every year. Teenage pregnancies have shown association with higher risks of prematurity, low birth weight, preeclampsia and anaemia as compared to adult pregnancies. The present study was analytical study of pregnant adolescent girls and feto-maternal outcome at a tertiary care centre.Methods: Girls between 10 to19 years, who attended the antenatal clinic and/or who were admitted in the hospital while pregnant or during labour were included in the study. A questionnaire along with detailed history and examination were done. Adolescents who were admitted for confinement, details of labour and mode of delivery were noted. The newborn was assessed in context of prematurity, IUGR or any other complications and referral to NICU.Results: Of the 1870 adolescent girls attending the OPD, 1234 (65.98%) were pregnant. There were 429 (4.02%) teenage deliveries in the institute during the study period. The girls were mostly married, older teenagers and primigravidas. The use of contraception was poor and awareness regarding antenatal care was lacking. The most common risk factor was anemia. The other risk factors included HDP, preterm labor, PROM, IUGR, hemorrhage and previous LSCS.Conclusions: Early childbearing increases the risks for both mothers and their newborns.  A delay in marriage givesadolescents opportunities for higher education, thus empowers them. Sex education should be a part of the school curriculum. Good antenatal care may reduce complications of teenage pregnancy

A Review on Fuzzy - AHP technique in Environmental Impact Assessment of Construction Projects, India

There are several countries today using procedures for Environmental impact assessment (EIA) is based on a series of mathematical techniques which attempt to localize, describe and assess the positive and negative effects that any human activity has on our environment, generally causing it to deteriorate. The environmental impact assessment (EIA) of projects requires the evaluation of the effects of very diverse actions on a number of different environmental factors, the uncertainty and inaccuracy being inherent in the process of allocating values to environmental impacts carried out by a panel of experts, stakeholders and affected population. The application of the fuzzy Logic and AHP technique can be helpful in identification of the risk associated with construction or developing project and improves the study of EIA. Fuzzy is one of the characteristics of human thoughts for which fuzzy sets theory is an effective tool for fuzziness. A fuzzy logic knowledge-based approach can be used for the environmental impact assessment study of the different construction projects. The review article highlights the role of Fuzzy AHP logic method in EIA of different construction projects, fuzzy logic modeling - software for fuzzy EIA, fuzzy numbers and steps of fuzzy methods as well as reveals that how fuzziness can be determined by applying fuzzy logic method in construction projects

Consequences of Pesticides on Environment: A Review

Outrageous use of pesticides has raised major issue of environmental concern. Pesticides cover broad range of insecticides, fungicides, weedicides, herbicides, rodenticides, nematicides, molluscicides, growth regulators etc. Although the purpose of pesticides is to harm only the target pests but if it is not used correctly, they can also harm people or the environment. Agricultural development perpetuates to remain the most paramount objective of Indian orchestrating and policy. In the process of development of agriculture, pesticides have become a consequential implement as a plant protection agent for boosting aliment engenderment. Further, pesticides play a consequential role by keeping many dreadful diseases. However, exposure to pesticides both occupationally and environmentally causes a range of human health quandaries. The objective of this paper is to review effects of pesticides on various biotic and abiotic factors of the environment and to mitigate proper solutions for it

Correlation of serum calcium levels with severity and functional outcome in acute ischemic stroke patients

Background: The objective of the study was to study the role of serum calcium levels in accessing the severity and functional outcome in the patients of acute ischemic stroke.Methods: The study included a total of 50 patients of acute ischemic stroke in the age group of 20 to 80 years. The patients were divided into four quartiles as per their serum albumin corrected levels measured during 24 ton 48 hours of incidence of ischemic stroke. The stroke severity was accessed by using National Institutes of Health (NIH) stroke scale and the functional outcome at the time of discharge and after three months of follow up by using modified Rankin scale (mRS). The results were analyzed by using appropriate statistical test.Results: We found that the patients those in higher calcium quartiles (Q3,Q4) had significantly lesser 24-48 hrs stroke severity as compared to those in lower calcium quartiles (Q1,Q2) i.e. in 72.73% in Q3, and 42.86% in Q4 were in mild NIH scale group as compared to 7.69% in Q2 and 0% in Q1. At the time of discharge and at three months follow up functional outcome was significantly better in higher calcium quartile group when compared to lower quartile (>3 mRS score suggestive of poor outcome in 91.66% of Q1, 76.93% in Q2, 27.27% in Q3 and 7.14% in Q4 at the time of discharge and 83.32% in Q1, 76.93 in Q2, 27.27% in Q3 and 7.14% in Q4 at three months of follow up). The correlation analysis showed that this association was statistically significant (p-value <0.01).Conclusions: we conclude that 24 -48 hours calcium levels have strong correlation with severity and functional outcome in acute ischemic stroke patients and hence it can be taken as a marker of severity and prognostic factor in these patients.