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1 – 10 of 215Vipin Sharma, Abdul Q. Ansari and Rajesh Mishra
The purpose of this paper is to design a efficient layout of Multistage interconnection network which has cost effective solution with high reliability and fault-tolerence…
Abstract
Purpose
The purpose of this paper is to design a efficient layout of Multistage interconnection network which has cost effective solution with high reliability and fault-tolerence capability. For parallel computation, various multistage interconnection networks (MINs) have been discussed hitherto in the literature, however, these networks always required further improvement in reliability and fault-tolerance capability. The fault-tolerance capability of the network can be achieved by increasing the number of disjoint paths as a result the reliability of the interconnection networks is also improved.
Design/methodology/approach
This proposed design is a modification of gamma interconnection network (GIN) and three disjoint path gamma interconnection network (3-DGIN). It has a total seven number of paths for all tag values which is uniform out of these seven paths, three paths are disjoint paths which increase the fault tolerance capability by two faults. Due to the presence of more paths than the GIN and 3-DGIN, this proposed design is more reliable.
Findings
In this study, a new design layout of a MIN has been proposed which provides three disjoint paths and uniformity in terms of an equal number of paths for all source-destination (S-D) pairs. The new layout contains fewer nodes as compared to GIN and 3-DGIN. This design provides a symmetrical structure, low cost, better terminal reliability and provides an equal number of paths for all tag values (|S-D|) when compared with existing MINs of this class.
Originality/value
A new design layout of MINs has been purposed and its two terminal reliability is calculated with the help of the reliability block diagram technique.
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S.K. Chaturvedi and K.B. Misra
In this paper, we propose a hybrid method to evaluate reliability of large and complex networks that incorporates the best features of earlier techniques such as KDH88 and CAREL…
Abstract
In this paper, we propose a hybrid method to evaluate reliability of large and complex networks that incorporates the best features of earlier techniques such as KDH88 and CAREL. The present method combines CAREL’s COMpare and REDuce operators along with KDH88 and eliminates the use of the other two operators of CAREL, thus resulting in an extensive reduction in the number of exclusive and mutually disjoint terms. The procedure not only saves CPU time by an appreciable amount but also can be run even on a low‐end PC. To demonstrate the advantage of handling a large complex system on a relatively small computer, we provide a comparison of the present approach with CAREL and KDH88 and solve several problems of various complexities on a low‐end PC.
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Neeraj Joshi, Sudeep R. Bapat and Raghu Nandan Sengupta
The purpose of this paper is to develop optimal estimation procedures for the stress-strength reliability (SSR) parameter R = P(X > Y) of an inverse Pareto distribution (IPD).
Abstract
Purpose
The purpose of this paper is to develop optimal estimation procedures for the stress-strength reliability (SSR) parameter R = P(X > Y) of an inverse Pareto distribution (IPD).
Design/methodology/approach
We estimate the SSR parameter R = P(X > Y) of the IPD under the minimum risk and bounded risk point estimation problems, where X and Y are strength and stress variables, respectively. The total loss function considered is a combination of estimation error (squared error) and cost, utilizing which we minimize the associated risk in order to estimate the reliability parameter. As no fixed-sample technique can be used to solve the proposed point estimation problems, we propose some “cost and time efficient” adaptive sampling techniques (two-stage and purely sequential sampling methods) to tackle them.
Findings
We state important results based on the proposed sampling methodologies. These include estimations of the expected sample size, standard deviation (SD) and mean square error (MSE) of the terminal estimator of reliability parameters. The theoretical values of reliability parameters and the associated sample size and risk functions are well supported by exhaustive simulation analyses. The applicability of our suggested methodology is further corroborated by a real dataset based on insurance claims.
Originality/value
This study will be useful for scenarios where various logistical concerns are involved in the reliability analysis. The methodologies proposed in this study can reduce the number of sampling operations substantially and save time and cost to a great extent.
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Hong Quan Nguyen, Quynh Huong Nguyen, Phuong Thao Tran, Ngoc Linh Trinh and Quynh Trang Nguyen
The aim of this empirical study is to investigate an integrated model that captures the way service quality of banking kiosks (BK-SQ) exerts its impacts on customer perceived…
Abstract
Purpose
The aim of this empirical study is to investigate an integrated model that captures the way service quality of banking kiosks (BK-SQ) exerts its impacts on customer perceived value and customer satisfaction and the moderating mechanism of technology readiness (TR) in the quality–satisfaction relationship in the banking sector in Vietnam.
Design/methodology/approach
An offline survey was conducted to obtain responses from 604 users of banking kiosks in Vietnam. Exploratory factor analysis, confirmatory factor analysis and structural equation modeling were used for data analysis. The moderating effect of TR was examined following the product indicator method.
Findings
The results validate significant positive correlations between BK-SQ, customer perceived value and customer satisfaction. Among six service quality dimensions, convenience is the most significant factor in predicting perceived service quality. The study also delineates how TR can moderate the link between service quality and customer satisfaction.
Research limitations/implications
Future studies may make further attempts to incorporate other human and demographic factors as a moderator into the research model.
Practical implications
Bank managers should strive to improve the operations of banking kiosks based on six aspects and increase TR levels of customers to boost customer satisfaction with banking kiosks.
Originality/value
The study contributes to the literature on service quality and self-service technologies (SSTs) by offering critical insights into how banks can make use of influence mechanisms in the model to enhance service quality and customer satisfaction.
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Xin David Ding, Yang Huang and Rohit Verma
Drawing upon research in consumer behavior, the purpose of this paper is to deploy an alternative way to predict behavioral intention with customer technology beliefs and…
Abstract
Purpose
Drawing upon research in consumer behavior, the purpose of this paper is to deploy an alternative way to predict behavioral intention with customer technology beliefs and experience in e‐brokerage services.
Design/methodology/approach
This study tests the proposed framework and relevant hypotheses with survey responses collected from 258 online investors.
Findings
Technology‐ready (TR) customer segments vary in their evaluations of customer‐service interfaces; interface evaluations affect cognitive service experience; and interface evaluations and cognitive experience affect customers' behavioral intentions.
Research limitations/implications
This study indicates that flow experience emerges as an important factor for achieving sustainable competitive advantages in e‐brokerage services. The research findings and relevant hypotheses might not apply to low‐credence services.
Practical implications
The findings indicate that service designers need to examine the life cycle of the intended service offerings and customize corresponding service/product features based on customers' technology beliefs and personal characteristics, which can further lead to maximized flow experience and increased intention rate.
Originality/value
The paper is among the first attempts to examine how psychographic features affect customers' experience and valuation of certain service system interfaces from service design perspective.
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R. El Bitar, G. Salloum and B. Nsouli
The purpose of this paper is to study the effects of positive and negative bias stressing on switching performance of power VDMOSFETs used in communication systems.
Abstract
Purpose
The purpose of this paper is to study the effects of positive and negative bias stressing on switching performance of power VDMOSFETs used in communication systems.
Design/methodology/approach
A positive and a negative high‐field stress are applied on the gate oxide of MOS devices and electrical characterization is performed after each period of stress, a comparison is presented.
Findings
Compared results between the two types of stress show that certain doses of stress can increase the device speed. The underlying changes of the threshold voltage under these two types of stress are referred to as the variation of the gate oxide‐trapped charge and interface trap densities.
Originality/value
This paper presents new and original experiments run over a number of metal‐oxide semiconductor field effect transistor devices to compare the effects of the direction of the applied field on the degradation and the reliability of these structures.
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Supply chains deliver goods and services between shippers and receivers, covering collection, transportation, distribution as well as their handling and storage in between. In…
Abstract
Supply chains deliver goods and services between shippers and receivers, covering collection, transportation, distribution as well as their handling and storage in between. In particular, transportation services are carried out by different transport modes. In some modern supply chains, different categories of air cargo carriers – combinations, freighter-only, and/or integrators – provide critical transport services.
This chapter develops a methodology for estimating the performance of supply chains served by an air cargo carrier network. The methodology is based on indicators of infrastructure use, technical/technological level, operational factors, economic factors, and environmental performance. This proposed methodology is applied to estimate performance of supply chains served by an integrated air cargo carrier – FedEx Express – operating a single hub in the US domestic air network. Results indicate that the methodology may be useful for estimation of overall supply chain performance under the condition that relevant data are available.
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DESIGN MTBF's under military airborne conditions are up to 10 times greater than those of present operational equipment. Reliability is enhanced through use of all solid‐state…
Abstract
DESIGN MTBF's under military airborne conditions are up to 10 times greater than those of present operational equipment. Reliability is enhanced through use of all solid‐state design whenever possible, electronic tuning and switching, a high reliability parts programme and application of multilayer and microelectronic circuits. Modular construction and planar functional packaging are employed. All units meet or exceed MIL‐E‐5400, class IX environmental requirements and are made by the Collins Radio Co.
As miniaturisation reaches new levels with the advent of surface mount technology, the mixed technology of surface mount and through‐hole brings into focus the need for…
Abstract
As miniaturisation reaches new levels with the advent of surface mount technology, the mixed technology of surface mount and through‐hole brings into focus the need for soldermaskless printed circuit boards which can have considerable shelf life before assembly and which can satisfy the new requirements of NTL‐STD‐SOLD for optimum solderability. The ‘weak‐kneed’ hole due to the tin‐copper intermetallic encountered in hot air levelled boards needs to be eliminated. This paper describes a process based on cap layers for terminal and test pads, and a duplex alloy plating of tin, nickel and lead on the outer layers which has several advantages over the currently preferred solder mask over bare copper/selective solder coating process.
The possibility of having access to all the world's literature from a single computer terminal stimulated the imagination of the research workers in the late' sixties. It was this…
Abstract
The possibility of having access to all the world's literature from a single computer terminal stimulated the imagination of the research workers in the late' sixties. It was this goal and the fascination of the co‐operation between man and machine, that inspired the major changes that have taken place in Information Retrieval over the past ten years.