In this paper, a generalized class of exponential chain ratio-cum-chain product type estimator has been developed for estimating finite population mean and its properties have been studied in presence of non-response. The expressions for the bias and mean square error of the proposed estimator have been obtained in two different cases of non-response. The theoretical and empirical studies have been given to demonstrate the efficiency of the proposed estimator with respect to the other relevant estimators under consideration.

The motives for the share repurchase is the increase in the value per share, and enhance the price-earnings (P/E) multiples, replenishment of the pool of share available for employee incentive options, prevention of hostile takeovers, and an effective way to return surplus cash to shareholders. Share repurchase programs can convince the capital structure of the company in a more direct way. Buy back stock reduces the market capitalization of a particular company, which makes the company able to strengthen capital gearing ratio as per its preference. The study found that if a company uses buying back of shares as a financial strategy, it will lead to increase in its capital gearing when financing is made for stock repurchase in the form of debt.

A Mobile Ad hoc Network (MANET) eliminates the complexity of an infrastructure configuration and allows wireless devices to communicate with each other independent of central infrastructure. It does not rely on a base station to coordinate the flow of messages to nodes in the network. A primary challenge for each device is to maintain the information to route traffic and data packets. Here, in our paper we analyze the performances of Destination Sequenced Distance Vector Routing (DSDV), Dynamic Source Routing (DSR), Ad hoc On-demand Distance Vector (AODV), Ad hoc On-demand Multi-path Distance Vector (AOMDV) protocols based on the Quality of Service metrics i.e., Packet Delivery Ratio, Packet Loss, Delay, Control Packet Overhead and Throughput using the Network Simulator (ns-2). In this paper we are presenting functionality, benefits, limitations and simulation results for the above mentioned routing protocols.

The shaft of the thresher must be stiffness and strength to thresh efficiently for long duration. The objective of this study is to carry out the dynamic stiffness analysis of the shaft for thresher and performance of the thresher. The threshing scheme is used to change the operating speeds and moisture content of the paddy field (grain). Dynamic stiffness and performance were analyzed by using Hooke’s law. To enhance the threshing efficiency between dynamic stiffness of the shaft for thresher and losses as an unbalance weight was attached on the shaft. The analysis can be used for un-threshed losses and total losses. Performance due to dynamic stiffness was developed based on experimental performance. The most total grain losses of 12.263% were recorded at threshing thresher speed of 5.31 m/s at experiment. At 17% moisture content, un-threshed grain is 2.01% and threshing capacity is 97.99%.

Catechol 1, 2 dioxygenase (EC 1.13.11.1) is an enzyme intended to catalyze the degradation of catechol an intermediate of phenolic compound from ortho-mechanisms of the 3-oxoadipate pathway. Catechol 1, 2 dioxygenase plays a key role in the aerobic degradation of aromatic compounds, because it is the substrate for aromatic ring cleavage enzymes and as such it can be the starting point of many peripheral metabolic pathways. So, catechol 1, 2 dioxygenase is deliberated for a solution of environmental pollution occurred by aromatic compounds. In this study, we have focused on the in-silico characterization and homology modeling of catechol 1, 2 dioxygenase. The in silico analysis was performed by various computational tools and programmes. The physicochemical properties of the selected catechol 1, 2 dioxygenase were analyzed by using ExPASy’sProtParam tool and it was found that the molecular weight (M.Wt) ranges around 35000 Da. Isoelectric Points (pI) exhibits acidic nature and aliphatic index infers that 95% catechol 1, 2 dioxygenaseare stable. The negative value of GRAVY indicates that there will be better interaction with water. Motif analysis of the sequences was conducted by using MEME for predicting probable domain of catechol 1, 2-dioxygenase. Homology modeling of catechol 1, 2 dioxygenase taken from Pseudomonas aeruginosa MH38 (AC NO: CDH71767) was performed by I-TASSER. Various bioinformatics programmes and servers like RAMPAGE, PROCHECK and ERRAT were used for analysis and validation of final 3D structures created through homology modeling.

Brain tumor, a notorious disease, has affected and devastated many lives. This disease has been the centre of attention of thousands of researchers for many decades, around the world. Researchers have combined their knowledge and efforts from many areas ranging from medical to mathematical sciences, to better understand the disease and to find more effective treatments. The key objective of this paper is to form a methodology to detect & extraction of brain tumor from a patient’s MRI. This method incorporates with some noise removal functions, segmentation and morphological operations which are the basic concepts of image processing. Proposed methodology will detect tumor and finally the fractional area of tumor will be calculated. All of this processing will be done by MATLAB software.

Ribe-Free Banking System (RFBS) is the most economic domain in the micro-finance area for the rural development as well as the economic development of Bangladesh. Rural development Scheme (RDS), the specialized form of Banking operations of Islami Bank Bangladesh Limited (IBBL), is offered for those people who live below the poverty and absolute poverty level in Bangladesh. The basic aim of this study is to examine the impact of RDS of IBBL on National GDP through rural development. The RDS of IBBL is the project sample of this study. The annual time-series data from FY 2002-2003 to FY 2013-2014 are used in this study for justifying the rural development through identifying the impact on GDP. This study has found that deposit and investment of RDS of IBBL have strong and significant impact on national GDP. The findings of the study will be helpful for the economic policy makers of the concerned authority of Bangladesh in reshaping the economic activities aiming at achieving the goal stated for the Vision-21, the golden jubilee of the independence of Bangladesh.

Students rely on different tools, method and techniques to overcome and cope with their stress which effects their schooling achievements. Stress is a part of our life and by using various techniques we can reduce stresses and could lead to a better life and can achieve academics goal and target. The objective of our study is to examine and observe the different kinds of stresses of the university’s students which have great effect on their study. There could be many stresses like the stress of controlling, leading and managing new responsibilities, financial stress, which heavily affect the lives of students. In order to analyze the research objects various statistical tools has been done on the data so as to find that there is a significant relation between stress and student performance. The study is based on the students of private and government universities and colleges of Islamabad, are taken as population and target on the result of the student performance and their success in the academic year.

Pain is a highly unpleasant sensory and emotional experience and postoperative pain control in children is a big challenge for their inability to express and react. In the past two decades, there has been a considerable progress in the understanding of children’s perception of pain and responses to pain and various pharmacological agents and analgesic delivery to avoid under treatment of pain in children. A parallel noteworthy advancement has occurred in the knowledge of anatomy, physiology and pharmacology of regional anesthetic techniques. Some of these techniques are now an integral part of perioperative and procedurerelated pain management in all ages, in part because of a greater concern about postoperative pain management in patients and in part because of technical advances in equipment to perform the blocks. Thus the present prospective comparative study is designed to evaluate the post operative analgesic efficacy of pre-incisional peritonsillar infiltration using tramadol, ketamine alone and combine with bupivacaine, xylocaine & normal saline.

Contemporarily there has been a number of techniques being suggested and used for heterogeneous handoff hitch. Different types of decision making methods are being implemented for handoff impediment. Mobile terminals progressing in neighbourhood will incur a handoff when its link capacity decreases below the threshold level. Various types of Multiple Attribute Decision Making methods have been exploited for handoff decision making. Here we have used a novel Reliable Seamless Handoff such as Simple Analytical Process method which uses Analytical Hierarchy Process for predicting the criterion weights and employed Simple Additive Weighting method for handoff decision making. Alternatives such as GSM, CDMA and EDGE networks are used. Data Rate, Packet Loss, Velocity, Bandwidth, Dwell time and Jitter are the parameters applied.