5,471 research outputs found
The Treatment of Ties in AP Correlation
No full textThe Kendall tau and AP correlation coefficients are very commonly use to compare two rankings over the same set of items. Even though Kendall tau was originally defined assuming that there are no ties in the rankings, two alternative versions were soon developed to account for ties in two different scenarios: measure the accuracy of an observer with respect to a true and objective ranking, and measure the agreement between two observers in the absence of a true ranking. These two variants prove useful in cases where ties are possible in either ranking, and may indeed result in very different scores. AP correlation was devised to incorporate a top-heaviness component into Kendall tau, penalizing more heavily if differences occur between items at the top of the rankings, making it a very compelling coefficient in Information Retrieval settings. However, the treatment of ties in AP correlation remains an open problem. In this paper we fill this gap, providing closed analytical formulations of AP correlation under the two scenarios of ties contemplated in Kendall tau. In addition,we developed an R package that implements these coefficients.Best Short Paper Accepted author manuscriptMultimedia ComputingWeb Information System
Operational Efficiency of District Central Cooperative Banks in Gujarat - A Comparative Study
No full textThe District Central Co-operative Banks is the central financing agency in the entire district. At the district level, 18 Central Co-operativeBanks including on taluka Co-operative banking Union with their 1026branches are operating within their area of operations. District Banks caterthe financial needs of the Urban Cooperative Credit Societies, FSS,LAMPS and the other non-agricultural Societies, Taluka and District Sales and Purchase Union etc through their branches spread at talk and village levels in the concerned District and thereby cover whole state. The cooperative credit structure has been developed in India with the mission that they will provide the agricultural and finance to the needy farmers at a reasonable rate of interest. The DCCBs are mainly doing three activities in their area of operation like (i) advancement of agricultural finance (ii) collection of deposits and (iii) providing banking services. Up to 1990 the DCCBs has a Monopoly business and they were covering about 70 percent of the population particularly in rural area through their business. After introduction of New Economic Policy (NEP) the business of the DCCBs has become very competitive and they are facing stiff competition in their area of operation where they have to flourish their business before Nationalized bank, Commercial Bank, Private Bank, Foreign Banks, Non-Banking Financing Agencies, and others. The overall all profitability of the DCCBs is also going down year to Year. Out of 18 DCCBs in Gujarat only 10 are earning profit and 8 are in loss. The percentage of NPA of the DCCB is also exceeding from 35 to 40 percent in most of the DCCBs. Looking to the present situation prevailing in the area of DCCBs it is revealed that DCCBs have to make themselves more effective and efficient in the area of operation so that they can face the stiff competition and justify their objective of the existence. The present research study will focus on the overall all working of the DCCBs and examine the operational efficiency with the help of the following objectives
Delamination Analysis of A Class of AP-PLY Composite Laminates
No full textA recently developed fiber placement architecture, AP-PLY, has been shown to give significantly improved damage tolerance characteristics of composite structures. The behavior of delaminations resulting from low speed impact damage is of particular concern. Major attention has been paid to expand current knowledge on the delamination response of simple AP-PLY composite structure and move towards in-depth understanding of the failure mechanisms behind the damage tolerance. This thesis presents the approaches to predict delamination onset and analyze delamination growth, in support of the search of the optimum woven pattern for AP-PLY composite laminates. The recovered interlaminar stress between layers combined with the maximum stress criterion determined the delamination onset of simple AP-PLY composite laminate under out-of-plane loads. 2D finite element models with cohesive elements inserted in the interfaces of woven layers have been built to evaluate the delamination initiation and propagation in the different woven patterns of simple AP-PLY composite beams. The parameters of the woven pattern, such as the woven angle, the number of woven plies, the number of straight filled plies, and the location of the woven patterns in through the thickness direction, were investigated and shown to have a significant effect on delamination creation and growth. An energy method based on beam theory was proposed to analyze the strain energy release rate (SERR) of an existing crack in an AP-PLY beam structure. The developed analytical method was implemented in isotropic materials and the obtained SERR of a crack was validated by reference results and finite element solutions. The general behavior of crack growth on the left or right crack tip was evaluated and basic trends leading to crack propagation on one side of the crack were established. A correction factor was introduced to improve the accuracy of the SERR of a small crack through the numerical calculation. The singularity of crack tip caused by dissimilar materials was investigated and was found that the inclusion of the singularity effect could increase the accuracy for small cracks. It has been shown that the neutral axis needs to be relocated to decouple the bending and membrane behavior of unsymmetrical composite laminates, thus to meet the requirement of minimizing the strain energy of the delaminated beam to calculate the SERR of a delaminated composite beam. The calculated SERR of a crack in a composite beam has been verified by comparing with a finite element model. The woven plies in AP-PLY composite laminate altered the layup and two conventional laminates with different stacking sequences were identified in an AP-PLY composite laminate based on the assumption that the resin areas were ignored. A step by step approach was developed to obtain the SERR of a crack that goes across different materials. The analytical SERR determined when two materials are used in sequence, sets the stage for optimization of AP-PLY composite laminates without taking account of the effect of the resin area. The procedure of optimization of simple AP-PLY pattern was proposed and industry may benefit for many applications. An equivalent stiffness approach was used to model regions containing resin pockets and straight or inclined composite layers. A series of three point bending tests was carried out where the failure process and loading capacity were evaluated. The methodology, procedure of optimization, philosophy outlined in this thesis might also be applied to the more complicated fully woven AP-PLY composite laminates. The work in this thesis contributes to the understanding of the behavior of AP-PLY composite laminates with delaminations
Determinants of Bank Efficiency: the case of Brazil
No full textThis paper analyzes the efficiency of the Brazilian banking sector over the post-privatization period of 2000-2007. We employ a Bayesian stochastic frontier approach, which provides exact efficiency estimates and confidence intervals and thus, allows an accurate comparison across institutions and bank groups. The results suggest that large banks are the most cost and profit efficient, supporting the concentration process observed in recent years. Foreign banks have achieved a good performance through either the establishment of new affiliates and the acquisition of local banks. The remaining public banks have had improvements in cost efficiency, but are relatively profit inefficient. Finally, we observe a positive impact of capitalization on efficiency.
Structure function analysis of blazars AP Librae and 3c279
No full textHighest Honors in AstronomyBlazars AP Librae and 3c279 are analyzed for microvariability using a technique known as structure function analysis. AP Librae was observed in April
of 2005 and 3c279 was observed in April of 2007. The data for AP Librae was
previously reduced by Andrew Collazzi and the author reduced the data for
3c279. Both sets of data were reduced using Robert Knop's data reduction
program.
The author ran structure function analysis on both sets of data. Structure function analysis is a statistical analysis run on data that is suppose to
nd timescales of variability, periodicity, and the noise type of data. Previous analysis of AP Librae confirmed mircrovariability, which also shows up in
the structure function of AP Librae. Blazar 3c279 was much quieter than AP
Librae and showed no microvariability durning any of the nights.College of Arts and ScienceDepartment of Physics and Astronom
AP-based wireless intrusion detection systems
No full textThis thesis was scanned from the print manuscript for digital preservation and is copyright the author.
Researchers can access this thesis by asking their local university, institution or public library to
make a request on their behalf. Monash staff and postgraduate students can use the link in the References field
Post-war Experiences with Developmental Central Banks: The Good, the Bad and the Hopeful
No full textThe current economic crisis, more than previous ones this past decade, has called into question the whole neo-liberal approach to financial management, including the approach the neo-liberal approach to central banking. Central banks focused on commodity inflation miss asset bubbles and credit crises, and with liberalized financial markets, they often lack the necessary tools to deal with these crises. Thus, academics and policy makers must seriously search for alternatives to the current neo-liberal models of financial management. This paper argues that one place to look for models is the history of developmental central banks and financial policies in both the developed and developing countries. Of course, there is not simple return to the past. But there are plenty of models and institutional structures to learn from. The cross-sectional data presented in this paper suggest that central bank developmental efforts to promote real investment does contribute to economic growth, but do not indicate other broad conclusions of success or failure. Much is to be learned from country case studies and the implementation of developmental tools in concrete circumstances.
Environmental toxicity, redox signaling and lung inflammation:the role of glutathione
No full textGlutathione (gamma-glutamyl-cysteinyl-glycine, GSH) is the most abundant intracellular antioxidant thiol and is central to redox defense during oxidative stress. GSH metabolism is tightly regulated and has been implicated in redox signaling and also in protection against environmental oxidant-mediated injury. Changes in the ratio of the reduced and disulfide form (GSH/GSSG) can affect signaling pathways that participate in a broad array of physiological responses from cell proliferation, autophagy and apoptosis to gene expression that involve H(2)O(2) as a second messenger. Oxidative stress due to oxidant/antioxidant imbalance and also due to environmental oxidants is an important component during inflammation and respiratory diseases such as chronic obstructive pulmonary disease, idiopathic pulmonary fibrosis, acute respiratory distress syndrome, and asthma. It is known to activate multiple stress kinase pathways and redox-sensitive transcription factors such as Nrf2, NF-kappaB and AP-1, which differentially regulate the genes for pro-inflammatory cytokines as well as the protective antioxidant genes. Understanding the regulatory mechanisms for the induction of antioxidants, such as GSH, versus pro-inflammatory mediators at sites of oxidant-directed injuries may allow for the development of novel therapies which will allow pharmacological manipulation of GSH synthesis during inflammation and oxidative injury. This article features the current knowledge about the role of GSH in redox signaling, GSH biosynthesis and particularly the regulation of transcription factor Nrf2 by GSH and downstream signaling during oxidative stress and inflammation in various pulmonary diseases. We also discussed the current therapeutic clinical trials using GSH and other thiol compounds, such as N-acetyl-l-cysteine, fudosteine, carbocysteine, erdosteine in environment-induced airways disease
Islamic bank stability - initial evidence / Mohd Afandi Abu Bakar, AP Dr. Mohd Fauzi Mohd Harun and AP Dr. Abdul Malek A Tambi
No full textStability of the banking sector is one of the most important features that support and contribute to continuous economic expansion and development. It will facilitate and smooth the flow of funds across the economic units more efficiently and effectively. This study examines the stability of Islamic banks. The study employs an unbalanced panel data analysis on the annual growths of 67 Islamic banks from various countries for the period spanning from 1998 to 2009. The finding provides some evidence on the stability of Islamic bank operations. The growth of Islamic bank financing is independent of the growth of business cycle indicators, thus, free from any speculative activities. Hence, the behaviour of the Islamic bank was not that enthusiastic to the movement in economic environment ffuctuaticns. Although the contingency reserve and provision for loan losses are able to control the financing activities from behaving pro-cyclically, the finding also shows that Islamic banks need to observe its management of contingency reserves and provision for loan losses. The amount is still not large enough to manage the earning assets that have a direct influence on the financing volume. This is evidence from the insignificant relationship of financing growth of Islamic bank to the real GDP growth, money supply M2 growth and the CPI growth. Therefore, the policy on contingency reserves and provision for loan losses needs some serious consideration from the Islamic bank management so that it will also be able to confirm the capability of Islamic bank to work as the transmitter mechanism of monetary policy
The Quest for Deeper Learning and Engagement in Advanced High School Courses
No full text· GLEF and a research team from the University of Washington worked with Washington\u27s Bellevue School District to develop and assess the impact of project-based learning on upper-level courses in high school.
· Research suggests that Advanced Placement (AP) courses may focus too much on accelerated content at the expense of deeper conceptual learning.
· The number of students taking AP courses has grown, but along with this the number failing has increased. GLEF and the research team tested project-based learning (PBL) to counteract this trend.
· Results after two years are promising. Students in the PBL-AP courses are performing as well or better than students in traditional AP courses.
· Other education funders are encouraged to use an iterative design process, work with a diverse design team, and bring in partners who can contribute needed expertise and resources
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