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The DirSA case study: An introduction to software architecture technology

Vassilka D. Kirova, Howard G. Kradjel
2002 Bell Labs technical journal  
The technical contributions of Saswata Bhattacharya, Piyush Lumba, Rahim Choudhary, and Ninad Mehta, also of Lucent, were valuable in specifying the directory architecture.  ...  Acknowledgments We gratefully acknowledge Don Stewart and David Sokoler of Lucent Technologies, who lent their confident leadership and support to the directory architecture engineering and specification  ...  It can be implemented as a configuration of possibly distributed data servers, DirSOFT, compliant with the DSA specification of the ISO X.500 standard.  ... 
doi:10.1002/bltj.2120 fatcat:zdcrylhkqjbzdccfug7su6fdh4

Building a peer-to-peer content distribution network with high performance, scalability and robustness

Manal El Dick, Esther Pacitti, Reza Akbarinia, Bettina Kemme
2011 Information Systems  
Content Distribution Networks (CDN) are fundamental, yet expensive technologies for distributing the content of web-servers to large audiences.  ...  A cost analysis that focuses on the gossip overhead of our approach is given in Section 5. Simulation methodology and results are presented in Section 6.  ...  The DHT-Directory strategy stores at the peer identified by the hash of the object's URL a small directory of pointers to recent downloaders of the object.  ... 
doi:10.1016/j.is.2010.08.007 fatcat:wyct5agxwfcezl4edzcj4push4

Failure-Tolerant Transaction Routing at Large Scale

Idrissa Sarr, Hubert Naacke, Stéphane Gançarski
2010 2010 Second International Conference on Advances in Databases, Knowledge, and Data Applications  
In this article, we propose a failure-tolerant solution for the distributed control of transaction routing in a large scale network.  ...  In particular, centralized control is prohibited because of its vulnerability and lack of efficiency at large scale.  ...  Shared Directory nodes (SD) are the building blocks of the shared directory implemented as a distributed index.  ... 
doi:10.1109/dbkda.2010.9 dblp:conf/dbkda/SarrNG10 fatcat:fc2ht7ixl5ch3hnsgbdvf6bqzq

An LDAP-based User Modeling Server and its Evaluation

Alfred Kobsa, Josef Fink
2006 User modeling and user-adapted interaction  
Directories also allow for the virtual centralization of distributed user models and their selective centralized replication if better performance is needed.  ...  , dynamic and transparent management of distributed information, built-in replication and synchronization, a rich number of pre-defined types of user information, and extensibility of the core representation  ...  We would like to thank the anonymous reviewers for their valuable comments on an earlier version of this paper.  ... 
doi:10.1007/s11257-006-9006-5 fatcat:l2smehqbrvdszp66flwaulnrzq

Privacy-Preserving DNS: Analysis of Broadcast, Range Queries and Mix-Based Protection Methods [chapter]

Hannes Federrath, Karl-Peter Fuchs, Dominik Herrmann, Christopher Piosecny
2011 Lecture Notes in Computer Science  
The design consists of two building blocks: a broadcast scheme for the distribution of a "top list" of DNS hostnames, and low-latency Mixes for requesting the remaining hostnames unobservably.  ...  We show that broadcasting the 10,000 most frequently queried hostnames allows zero-latency lookups for over 80 % of DNS queries at reasonable cost.  ...  the hypergeometric distribution: P n T = P (X > 0) = 1 − P (X = 0) = 1 − αN 0 (1−α)N n N n = 1 − (1−α)N n N n For T = 200ms we obtained α = 7 %, i. e., P 10 200ms ≈ 0.516 and P 100 200ms ≈ 0.999, which  ... 
doi:10.1007/978-3-642-23822-2_36 fatcat:4qeel4zemvcphn3plh6r2rjwye

Probabilistic Dropping in Push and Pull Dissemination over Distributed Hash Tables

Emanuele Carlini, Massimo Coppola, Laura Ricci
2011 2011 IEEE 11th International Conference on Computer and Information Technology  
We exploit the concept of popularity of specific items, which is evaluated by performing a real-time analysis of the query distribution, and allows to decrease a significant fraction of messages without  ...  Dynamic information management via Distributed Hash Tables (DHT) is an important problem which revolves around the trade-off between data freshness and the overhead due to information updates.  ...  Acknowledgments The authors acknowledge the support of Project FP7-257438, Contrail: Open Computing Infrastructures for Elastic Services and Project FP6-033576 XtreemOS: Building and Promoting a Linuxbased  ... 
doi:10.1109/cit.2011.94 dblp:conf/IEEEcit/CarliniCR11 fatcat:wfk5pgtxxffpvcvzcwqsaapr4i

Face Recognition Of Profile Image Stored On Blob

Prof. Shweta BhelondeMuley, Ketakee Dangre
2018 Zenodo  
Face acknowledgment is a combination of face detection and face recognition.  ...  For recognized person look in biometric framework a few strategies are accessible, for example, thumb impression, signature identification, eye to eye connection, design coordinating, picture approval  ...  Selection one parameter and separation into organizes x-y axis .  ... 
doi:10.5281/zenodo.1226630 fatcat:vbvivoksjbb7joe5ck36ky4hfu

Understanding the Roles of Servers in Large-Scale Peer-Assisted Online Storage Systems

F. Liu, Y. Sun, B. Li, X. Zhang
2009 2009 IEEE International Conference on Communications  
current design and strategy, which further draw practical implications on future design.  ...  Online storage systems that provide versatile and convenient platforms for content distribution have attracted significant attention over the Internet.  ...  Server Strategies Servers in FS2You not only provide online storage, but also cooperate with content distribution. Several strategies are adopted to facilitate content replication and distribution.  ... 
doi:10.1109/icc.2009.5199550 dblp:conf/icc/LiuSLZ09 fatcat:gd42gfwihbgebhbuentr3nztcu

Public Key Infrastructure [chapter]

Terence Spies
2009 Computer and Information Security Handbook  
The ability to create, manipulate, and share digital documents has created a host of new applications (email, word processing, e-commerce websites), but also created a new set of problems, namely how to  ...  protect the privacy and integrity of digital documents when stored and transmitted.  ...  of the broader X.500 directory standard.  ... 
doi:10.1016/b978-0-12-374354-1.00026-1 fatcat:zbdhgcy5azgnhn453c5kydhuba

A Bayesian cluster analysis method for single-molecule localization microscopy data

Juliette Griffié, Michael Shannon, Claire L Bromley, Lies Boelen, Garth L Burn, David J Williamson, Nicholas A Heard, Andrew P Cope, Dylan M Owen, Patrick Rubin-Delanchy
2016 Nature Protocols  
Three features of such data cause standard cluster analysis approaches to be ineffective: the data take the form of a list of points rather than a pixel array; there is a non-negligible unclustered background  ...  We present the process of generating simulated and experimental data which are suitable for our algorithm, the analysis itself, and the extraction and interpretation of key cluster descriptors such as  ...  refresh=true) with version no earlier than 2014b. Procedure 1. In order to start analysis of an experimental dataset, proceed with option A.  ... 
doi:10.1038/nprot.2016.149 pmid:27854362 fatcat:rxh4bjb5onewxm2gf3dhemnesq

Experiences With the OSF Distributed Computing Environment [chapter]

John Dilley
1995 Open Distributed Processing  
This paper describes the Open Software Foundation's Distributed Computing Environment (OSF DCE) in the context of the ISO Reference Model of Open Distributed Processing (RM-ODP).  ...  space browser/editor for the DCE directory service.  ...  Thanks also to the pioneering members of the original"Exploitation ofDCE" prototype team, and especially to the team that made HP's DCE into a viable distributed computing platform.  ... 
doi:10.1007/978-0-387-34882-7_36 fatcat:xja5ldhus5dbbdmdjyy5dpetia

Confidentiality, Integrity and High Availability with Open Source IT green [article]

Luciana Guimaraes
2008 arXiv   pre-print
This paper presents elements that form the structure of a network of data using secure stable and mature technologies that meet the requirement of having code free.  ...  Basearemos this work experience gained in a real environment and using paravirtualization to show a situation more critical and now real in most companies, the virtualization of servers.  ...  We will be using this distribution by the stable version available on the date of creation of this article.  ... 
arXiv:0805.4394v1 fatcat:gwidww5euve5nf6h2yqtmtrtqm

A churn-resistant peer-to-peer web caching system

Prakash Linga, Indranil Gupta, Ken Birman
2003 Proceedings of the 2003 ACM workshop on Survivable and self-regenerative systems in association with 10th ACM Conference on Computer and Communications Security - SSRS '03  
Churn arises from continued and rapid arrival and failure (or departure) of a large number of participants in the system, and traces from deployments have shown that it can lead to extremely stressful  ...  In addition, the system improves on the network locality of cache accesses in previous web caching schemes.  ...  More specifically, in a system of 1000 nodes, 500 nodes were churned by mapping to the first 500 entries in the Overnet availability traces 4 .  ... 
doi:10.1145/1036921.1036922 fatcat:f5lmtruorfbspj4tt2s7uremhi

Comparing the Cost of Protecting Selected Lightweight Block Ciphers against Differential Power Analysis in Low-Cost FPGAs

William Diehl, Abubakr Abdulgadir, Jens-Peter Kaps, Kris Gaj
2018 Computers  
of architecture targeted to optimize throughput-to-area (TP/A) ratio and suitable for introducing countermeasures to Differential Power Analysis (DPA).  ...  difficult, since researchers typically use varied architectures, optimization strategies, technologies, and evaluation techniques.  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/computers7020028 fatcat:zdm7bm5pwvc6lotedvaldjrwby

RTSYS: A DOS application for the analysis of reaction time data

Andrew Heathcote
1996 Behavoir research methods, instruments & computers  
RTSYS is a menu-driven DOS application for the manipulation, analysis, and graphical display of reaction time data.  ...  Distribution fitting and flexible censoring and rescaling options allow RTSYS to address the problems of reaction time distribution skew and outlying responses with reasonable sample sizes.  ...  (i.e., area) of the pdffrom 499 to 500 msec.  ... 
doi:10.3758/bf03200523 fatcat:btnui44thrfupfdajgefucafri
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