COMMENTS ON THE SURVEY BY BALAKRISHNAN AND ZHAO

2013 ◽  
Vol 27 (4) ◽  
pp. 465-466
Author(s):  
Marco Burkschat
Keyword(s):  
Order Statistics ◽  
Open Problems ◽  
Stochastic Orderings ◽  
Heterogeneous Populations ◽  
Detailed Survey ◽  
Current State ◽  
Fast Development

At first, I would like to thank the authors for giving the detailed survey on the current state of stochastic orderings of order statistics from heterogeneous populations. Their review illustrates the fast development of research in this area during the recent years, in particular including many important contributions by the authors themselves. Besides the concrete open problems given in the different sections of the review, the following general topics may be also of interest for further studies.

Univariate and multivariate stochastic orderings of residual lifetimes of live components in sequential (𝑛-𝑟+ 1)-out-of-𝑛 systems

2018 ◽  
Vol 55 (3) ◽  
pp. 834-844
Author(s):  
Ghobad Barmalzan ◽  
Abedin Haidari ◽  
Narayanaswamy Balakrishnan
Keyword(s):  
Order Statistics ◽  
Exponential Distribution ◽  
Sufficient Conditions ◽  
Sequential Order ◽  
Stochastic Orderings ◽  
Sequential Order Statistics ◽  
Residual Lifetimes

Abstract Sequential order statistics can be used to describe the ordered lifetimes of components of a system when the failure of a component may affect the reliability of the remaining components. After a reliability system consisting of n components fails, some of its components may still be alive. In this paper we first establish some univariate stochastic orderings and ageing properties of the residual lifetimes of the live components in a sequential (n-r+1)-out-of-n system. We also obtain a characterizing result for the exponential distribution based on uncorrelated residual lifetimes of live components. Finally, we provide some sufficient conditions for comparing vectors of residual lifetimes of the live components from two sequential (n-r+1)-out-of-n systems. The results established here extend some well-known results in the literature.

scholarly journals Current State: The Development of Thin Film Solar Cells Based on Kesteritee Compound

2017 ◽  
Vol 2 (1) ◽  
pp. 99
Author(s):  
Fianti Fianti ◽  
Badrul Munir ◽  
Kyoo Ho Kim ◽  
Mohammad Ikhlasul Amal
Keyword(s):  
Thin Film ◽  
Solar Cell ◽  
Thin Film Solar Cell ◽  
Photovoltaic Devices ◽  
Rare Element ◽  
Solar Cell Application ◽  
Current State ◽  
Production Growth ◽  
Fast Development ◽  
Chalcopyrite Compound

<div style="text-align: justify;">Thin film solar cell experience fast development, especially for thin film solar cell CdTe and Cu(In,Ga)Se2 (CIGS). However, the usage of rare element in the nature such as In, Te, and Ga and toxic such as Cd give limitation in the future development and production growth in big scale. Development of other alternative compound with maintain the profit of electronic and optic character which get from CIGS chalcopyrite compound will be explain. Compound of Cu2ZnSnSe4 (CZTSe) is downward compound from CIGS with substitute the In and Ga element with Zn and Sn. The compound kesterite structure can be modified with variation of chalcogen element to get wanted character in solar cell application. Efficiency record of photovoltaic devices conversion used this compound or downward reach 9.7%.©2016 JNSMR UIN Walisongo. All rights reserved.</div>

Face Recognition in Adverse Conditions

2018 ◽  
pp. 2184-2210 ◽  
Author(s):  
Maria De Marsico ◽  
Michele Nappi
Keyword(s):  
Face Recognition ◽  
Recent Literature ◽  
Research Topic ◽  
Open Problems ◽  
Adverse Conditions ◽  
Future Developments ◽  
Detailed Survey ◽  
Research Activities

In this chapter, the authors discuss the main outcomes from both the most recent literature and the research activities summarized in this book. Of course, a complete review is not possible. It is evident that each issue related to face recognition in adverse conditions can be considered as a research topic in itself and would deserve a detailed survey of its own. However, it is interesting to provide a compass to orient one in the presently achieved results in order to identify open problems and promising research lines. In particular, the final chapter provides more detailed considerations about possible future developments.

scholarly journals The second dual of a Banach algebra

1979 ◽  
Vol 84 (3-4) ◽  
pp. 309-325 ◽  
Author(s):  
J. Duncan ◽  
S. A. R. Hosseiniun
Keyword(s):  
Banach Algebra ◽  
Open Problems ◽  
Current State ◽  
Second Dual ◽  
The Subject

SynopsisWe give a survey of the current state of knowledge on the Arens second dual of a Banach algebra, including some simplified proofs of known results, some new results, some open problems and a full bibliography of the subject.

scholarly journals Recent Advances and Challenges in XML Document Routing

2010 ◽  
pp. 136-150
Author(s):  
Mirella M. Moro ◽  
Zografoula Vagena ◽  
Vassilis J. Tsotras
Keyword(s):  
Data Exchange ◽  
State Of The Art ◽  
Data Delivery ◽  
Open Problems ◽  
Ip Address ◽  
Current State ◽  
Recent Advances ◽  
Xml Document

Content-based routing is a form of data delivery whereby the flow of messages is driven by their content rather than the IP address of their destination. With the recognition of XML as the standard for data exchange, specialized XML routing services become necessary. In this chapter, the authors first demonstrate the relevance of such systems by presenting different world application scenarios where XML routing systems are needed and/or employed. Then, they present a survey of the current state of the art. Lastly, they attempt to identify issues and problems that have yet to be investigated. Their discussion will help identify open problems and issues and suggest directions for further research in the context of such systems.

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