A Literature review on industrially accepted MPPT techniques for solar PV system

Solar energy is a clean renewable energy and it is available around 89,000 TW on the earth surface. To get maximum power from a solar PV system with minimum power transfer loss is one of the main design objectives of an energy transferring network. Power electronic devices perform a very important character for an efficient PV power tracking system control and either incorporates to transfer the generated power to the ac/dc grid or battery storage system. In this case the duty of the power electronics devices used in PV system is to track maximum power point under different operating conditions of environment, so that power tracking efficiency of solar PV system can be improved. This paper encapsulates based the on performance comparisions on the behavior of MPP under uniform and nonuniform operating conditions and selects the optimum duty cycle for industrially accepted MPPT techniques with their algorithm

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

Incidence of phyllodes tumors of breast at a single centre in Allahabad, Uttar Pradesh, India

Background: Phyllodes tumor of breast is the rare fibro-epithelial tumor of breast constituting <1% of breast neoplasms. They are locally aggressive tumor and suddenly attain a big size. Fine needle aspiration cytology should have both stromal and epithelial component to make the diagnosis. Wide local excision of 1 to 2 cm margin of normal breast is the treatment of choice for tumour of <10 cm in size and simple mastectomy for tumor more than 10 cm. This study was conducted to evaluate the incidence and outcome after surgery for phyllodes tumor at our centre.Methods: Data of 15 patients at our centre was retrieved retrospectively from January 2011 to April 2016.Results: Out of these 15, 14 were female and 1 was male. 14 of them undergo wide local excision under general anesthesia while in one of the patients simple mastectomy was done. Based on tumor histology they are divided into 3 histotypes i. e. benign, borderline, and malignant. 12 patients were found to be benign, 3 borderline and none malignant. Out of 3 borderline disease patients 1 developed recurrence 8 months later to initial surgery. Wide local excision was done for total of 10 times and every time histopathology revealed borderline phyllodes but last report revealed sarcomatous changes. Patient also developed lung metastases and so was referred to oncology department and review histopathology revealed low grade spindle cell sarcoma. Full radiotherapy and complete course of MAID chemotherapy regimen was given but patient still developed local recurrence and metastasis to lungs. All patients in benign category were doing well and none of them developed recurrences in due course.Conclusions: Phyllodes tumor is an interesting entity for both surgeons as well as pathologists because of its rare occurrence and varied histological features. Rapidly growing nature of this tumor does not necessarily indicate malignant disease. No correlation was found between tumor size and recurrence

Effect of seaweed saps on growth, yield, nutrient uptake and economic improvement of maize (sweet corn)

A field experiment was conducted during the rabi season of 2012-13 at Research cum Instructional Farm of Indira Gandhi Krishi Vishwavidyalaya, Raipur (Chhattisgarh) to study the effects of seaweed saps on growth, yield, nutrient uptake and economic of maize (sweet corn) in Matasi soil of Chhattisgarh. The foliar spray of two different species (namely Kappaphycus and Gracilaria) was applied thrice at different interval of crop with different concentrations (0, 2.5, 5.0, 7.5, 10.0 and 15% v/v) of seaweed extracts. Foliar applications of seaweed extract significantly enhanced the growth, yield, nutrient uptake and B:C ratio parameters. The green cob yield (189.97 q ha-1) and fodder yield (345.19 q ha-1) were recorded highest under treatment (T8) 15% G Sap + recommended dose of fertilizer (RDF) which was significant similar with treatment 15% K Sap + RDF (185.24 q ha-1) in case of green cob yield. The highest N, P and K uptake by green cob and fodder were observed under 15% G Sap + RDF (T8). Treatment 15% G Sap + RDF (T8), recorded maximum gross return (Rs. 2,07,230 ha-1), net return (Rs. 1,38,756 ha-1) and B:C ratio (2.0), which was followed by treatment 15% K Sap + RDF (T4) with net return (Rs. 1,33,199 ha-1) and B:C ratio (1.95). Treatment 15% G Sap + RDF (T8) gave Rs. 45,996 ha-1 more as compared to Water spray + RDF (T9)

Scholarly Communications of Mizoram University on Web of Science in Global Perspective: A Scientometric Assessment

Objectives: Scientometric assessment of the performance of scholarly communications of Mizoram University in world scenario. Methods: The ten years of scholarly communications have been retrieved from Web of Science for Mizoram University. The study analyses the scholarly communications, citations data, h-index, prolific contributors, forms of scholarly communications, funding agencies, highly cited scholarly communications, top areas of scholarly communications, authorship patterns and degree of collaboration. Results: Physics and Chemistry subjects found the highest productive area of scholarly communications, multiple authorship is prevalent with high degree of collaboration among authors, Department of Science and Technology (DST) as the topmost funding agency, South Korea found the strong collaborative country with Mizoram University in academic research, “Tiwari D” as the highest cited author, “Thapa RK” as the highest productive author, and increased growth in number of scholarly communications as well as citations. Contributions: The study analyzed the scholarly communications in terms of scientometric assessment and presented the current scenario of Mizoram University’s scholarly communications at the world level based on WoS database. It gives the insight to understand the situation of scholarly communications and make the future course of action accordingly. Mizoram University’s academic departments may also take the future course of action for more research to boost-up the university’s contribution at the global level

Scholarly Communications of Mizoram University on Web of Science in Global Perspective: A Scientometric Assessment

Objectives: Scientometric assessment of the performance of scholarly communications of Mizoram University in world scenario. Methods: The ten years of scholarly communications have been retrieved from Web of Science for Mizoram University. The study analyses the scholarly communications, citations data, h-index, prolific contributors, forms of scholarly communications, funding agencies, highly cited scholarly communications, top areas of scholarly communications, authorship patterns and degree of collaboration. Results: Physics and Chemistry subjects found the highest productive area of scholarly communications, multiple authorship is prevalent with high degree of collaboration among authors, Department of Science and Technology (DST) as the topmost funding agency, South Korea found the strong collaborative country with Mizoram University in academic research, “Tiwari D” as the highest cited author, “Thapa RK” as the highest productive author, and increased growth in number of scholarly communications as well as citations. Contributions: The study analyzed the scholarly communications in terms of scientometric assessment and presented the current scenario of Mizoram University’s scholarly communications at the world level based on WoS database. It gives the insight to understand the situation of scholarly communications and make the future course of action accordingly. Mizoram University’s academic departments may also take the future course of action for more research to boost-up the university’s contribution at the global level

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

The accuracy of USG and USG guided FNAC axilla in predicting nodal metastasis in a clinically lymph node negative cancer breast patient

Background: Breast malignancies are the second most common cause of cancer-related mortality among women. As the size of the primary breast cancer increases, some cancer cells are shed into cellular spaces and transported via the lymphatic network of the breast to the regional lymph nodes, especially the axillary lymph nodes. Objective of the study was to determine the accuracy of USG and US-FNAC in detecting lymph node metastasis in a clinically lymph node negative CA Breast patient.Methods: This prospective study was conducted on 40 consecutive patients with biopsy proven breast cancer with clinically negative axilla, who had attending the OPD or IPD in our department of surgery, Swaroop Rani Nehru Hospital, Allahabad, during the period of 2014 to 2015. All of these patients were planned to undergo surgery (breast conservation or modified radical mastectomy with axillary clearance).Results: Sensitivity of the study = 97.77%, specificity = 25%, positive predictive value =92.01%, negative predictive value =50%, diagnostic accuracy =90%.Conclusions: Using axillary ultrasound and selective US-FNAC is a rapid, non-morbid method of staging the axilla in newly diagnosed breast cancer patients and should become a routine part of patient care because it can spare many patients particularly those who are undergoing axillary dissection

OPEC countries: research performance across nations in Library and Information Science

Study analyses scientometric assessment of LIS research performance of OPEC member countries. The research publication data indexed in Scopus for the OPEC member countries were extracted and used for the analysis. The data are analyzed to identify quantitative research performance of OPEC member countries in terms of total documents, citable documents, and non-citable documents. The citation impact is measured by different parameters, like total citations, citations per document, Relative Citation Impact, self-citations, and self-citations per document. Finally, the quality of the document is assessed by means of h-index. Nigeria has been found to be most productive country in LIS research and Iran is receiving highest citations and also in h-index performance amongst OPEC member countries. Iraq, Libya, and Ecuador are far away in LIS research productivity and needs strong steps to improve LIS research productivity for future endeavor

A power law solution for FRLW Universe with observational constraints

This paper examines a power law solution under $f(R,T)$ gravity for an isotropic and homogeneous universe by considering its functional form as $f(R,T) = R + \xi RT$, where $\xi$ is a positive constant. In $f(R,T)$ gravity, we have built the field equation for homogeneous and isotropic spacetime. The developed model's solution is $a = \alpha t^{\beta}$. We have used the redshift in the range $0 \leq z \leq 1.965$ and obtained the model parameters $\alpha$, $\beta$, $H_0$ by using the Markov Chain Monte Carlo (MCMC) method. The constrained values of the model parameter are as follows: $H_0 = 67.098^{+2.148}_{-1.792}$ km s$^{-1}$ Mpc$^{-1}$, $H_0 = 67.588^{+2.229}_{-2.170}$ km s$^{-1}$ Mpc$^{-1}$, $H_0 = 66.270^{+2.215}_{-2.181}$ km s$^{-1}$ Mpc$^{-1}$, $H_0 = 65.960^{+2.380}_{-1.834}$ km s$^{-1}$ Mpc$^{-1}$, $H_0 = 66.274^{+2.015}_{-1.864}$ km s$^{-1}$ Mpc$^{-1}$ which have been achieved by bounding the model with the Hubble parameter ($H(z)$) dataset, Baryon Acoustic Oscillations (BAO) dataset, Pantheon dataset, joint $H(z)$ + Pantheon dataset and collective $H(z)$ + BAO + Pantheon dataset, respectively. These computed $H_o$ observational values agree well with the outcomes from the Plank collaboration group. Through an analysis of the energy conditions' behaviour on our obtained solution, the model has been examined and analysed. Using the Om diagnostic as the state finder diagnostic tool and the jerk parameter, we have also investigated the model's validity. Our results show that, within a certain range of restrictions, the proposed model agrees with the observed signatures