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web-based applications to Simulate Drinking Water Inorganic Chloramine Chemistry

JOURNAL AMERICAN WATER WORKS ASSOCIATION 2018年第11期110卷 E43-E61页

作者： Wahman, David G. US EPA Off Res & Dev Cincinnati OH 45268 USA

Two web-based applications (WBAs) relevant to drinking water practice are presented to simulate (1) inorganic chloramine formation and stability, including an example inorganic chloramine demand reaction for organic matter, and (2) breakpoint curves. The model underlying both WBAs is a well-established inorganic chloramine formation-and-decay model. The WBAs were developed to be freely accessible over the Internet as web pages (https://***/Unified-Combo/ and https://***/Breakpoint-Curve/), providing drinking water practitioners (e.g., operators, regulators, engineers, professors, students) with learning tools to explore inorganic chloramine chemistry in an interactive manner without requiring proprietary software or user modeling expertise. The WBAs allow the user to specify two side-byside simulations, providing a direct comparison of impacts associated with changing simulation conditions (e.g., free chlorine, free ammonia, and total organic carbon concentrations;pH;total alkalinity;and temperature). Once completed, the user may download simulation data to use offline. The WBAs' implementation, validation, and example simulations are described.

关键词： breakpoint chloramines formation and decay web-based applications

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web-based applications for building, managing and analysing kinetic models of biological systems

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BRIEFINGS IN BIOINFORMATICS 2009年第1期10卷 65-74页

作者： Lee, Dong-Yup Saha, Rajib KhanYusufi, Faraaz Noor Park, Wonjun Karimi, Iftekhar A. Natl Univ Singapore Dept Chem & Biomol Engn Singapore 117576 Singapore

Mathematical modelling and computational analysis play an essential role in improving our capability to elucidate the functions and characteristics of complex biological systems such as metabolic, regulatory and cell signalling pathways. The modelling and concomitant simulation render it possible to predict the cellular behaviour of systems under various genetically and/or environmentally perturbed conditions. This motivates systems biologists/bioengineers/bioinformaticians to develop new tools and applications, allowing non-experts to easily conduct such modelling and analysis. However, among a multitude of systems biology tools developed to date, only a handful of projects have adopted a web-based approach to kinetic modelling. In this report, we evaluate the capabilities and characteristics of current web-based tools in systems biology and identify desirable features, limitations and bottlenecks for further improvements in terms of usability and functionality. A short discussion on software architecture issues involved in web-based applications and the approaches taken by existing tools is included for those interested in developing their own simulation applications.

关键词： systems biology web-based applications kinetic modelling dynamic simulation

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Software security analysis and assessment model for the web-based applications

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JOURNAL OF COMPUTATIONAL METHODS IN SCIENCES AND ENGINEERING 2009年第1期9卷 S179-S189页

作者： Wang, Y. Lively, W. M. Simmons, D. B. Texas A&M Univ Dept Comp Sci College Stn TX 77843 USA

For web-based applications, a security analysis was conducted in order to identify software vulnerabilities and develop a new security assessment model. During such an analysis, the major security vulnerabilities observed in the open web proxy honeypot during the data collection time from February to March 2005 were computer worm attacks in Code Red and Nimda, AWSTAT attacks, unauthorized access request (HTTP error code 403), MS-SQL version overflow attacks, etc. To develop the security assessment model, we extended the generic security model for a single component system to multiple components using the multidimensional Markov process model. The resulting model was applied to the most popular software systems. The software system availability in security is computed using real data, and the mean time to security failure is calculated. This paper not only provides the software vulnerability analysis of the web-based applications, but also details the software security assessment for multiple component systems.

关键词： Software security assessment model web-based applications Markov process model

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On the Use of XML in Medical Imaging web-based applications

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IRBM 2017年第1期38卷 3-12页

作者： Mata, C. Oliver, A. Lalande, A. Walker, P. Marti, J. Univ Girona Comp Vision & Robot Inst Campus MontiliviEd P IV Girona 17071 Spain Univ Bourgogne CNRS UMR Lab Elect Informat & Image Le21 F-6306 Dijon France

The rapid growth of digital technology in medical fields over recent years has increased the need for applications able to manage patient medical records, imaging data, and chart information. web-based applications are implemented with the purpose to link digital databases, storage and transmission protocols, management of large volumes of data and security concepts, allowing the possibility to read, analyze, and even diagnose remotely from the medical center where the information was acquired. The objective of this paper is to analyze the use of the Extensible Markup Language (XML) language in web-based applications that aid in diagnosis or treatment of patients, considering how this protocol allows indexing and exchanging the huge amount of information associated with each medical case. The purpose of this paper is to point out the main advantages and drawbacks of the XML technology in order to provide key ideas for future web-based applications. (C) 2016 AGBM. Published by Elsevier Masson SAS. All rights reserved.

关键词： XML language web-based applications Computational medicine Digital databases Security

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An Exploratory study to identify Complementary Resources to the implementation of web-based applications in a Paint supply Chain

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INTERNATIONAL JOURNAL OF INFORMATION SYSTEMS AND SUPPLY CHAIN MANAGEMENT 2008年第2期1卷 40-56页

作者： Lee, Yootaek Kim, Jay Miller, Jeffery G. Babson Coll Babson Pk MA 02157 USA Boston Univ Asian Management Ctr Boston MA 02215 USA Boston Univ Boston MA 02215 USA

This study focuses on identifying (a) the complementary resources that influence the successful implementation of web-based applications for supply chain management, and (b) the degree to which certain types of complementary resources function to support the successful implementation of web-based applications. An exploratory case study is employed to identify potential complementary resources that are required for the successful implementation of web-based applications that support various portions of the supply chain management task. The utility of a potential complementary resource to each web-based application for a supply chain task is evaluated to determine the relative value of the resource to the web-based application. A matrix is then developed to show the degree to which a particular complementary resource is utilized to implement web-based applications. The contribution of this study is to enhance our understanding of how web-based applications and complementary resources can work together to create competitive advantages in supply chains.

关键词： case study competitive advantage complementary resources resource-based theory supply chain management web-based applications

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A study of security and performance issues in designing web-based applications

A study of security and performance issues in designing Web-...

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IEEE International Conference on e-Business Engineering

作者： Yang, Shin-Jer Chen, Jia-Shin Soochow Univ Dept Comp & Informat Sci Taipei Taiwan

ISBN: (纸本)9780769530031

Due to the evolution of Internet technology and application popularization, security and performance have become key issues for implementing web-based applications. Presently, most of the web-based applications design only consider security issue, but ignore performance problem. According to these two issues, we propose a new approach to integrate security and performance aspects for web-based applications, called ISPWAD, which combines SWAP and RBAC frameworks. The purposes of proposed ISPWAD are to fix the security holes and improve the processing performance during in designing web-based applications. In this paper we propose the ISPWAD framework and design its algorithm, and also illustrate how to implement the secure web-based applications with tuning performance. Then, we will utilize the ISPWAD to set up a practical EIP system and perform simulations for security solutions and performance improvements. Finally, our experimental results indicate that the proposed ISPWAD can solve related security holes, obtain better processing performance, and reduce development time and cost. In addition, the ISPWAD can attain a good balance-point between security and performance. In the future, the ISPWAD framework can provide a reference model for implementing e-Commerce, ERP II, or EIP systems.

关键词： ISPWAD web-based applications SWAP RBAC EIP

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Capacity Planning and Allocation for web-based applications

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DECISION SCIENCES 2014年第3期45卷 535-567页

作者： Mohan, Srimathy Alam, Ferdous M. Fowler, John W. Gopalakrishnan, Mohan Printezis, Antonios Arizona State Univ Dept Supply Chain Management WP Carey Sch Business Tempe AZ 85287 USA Nestle USA Inc Supply Chain Business Intelligence Glendale CA 91203 USA

Motivated by the technology division of a financial services firm, we study the problem of capacity planning and allocation for web-based applications. The steady growth in web traffic has affected the quality of service (QoS) as measured by response time (RT), for numerous e-businesses. In addition, the lack of understanding of system interactions and availability of proper planning tools has impeded effective capacity management. Managers typically make decisions to add server capacity on an ad hoc basis when systems reach critical response levels. Very often this turns out to be too late and results in extremely long response times and the system crashes. We present an analytical model to understand system interactions with the goal of making better server capacity decisions based on the results. The model studies the relationships and important interactions between the various components of a web-based application using a continuous time Markov chain embedded in a queuing network as the basic framework. We use several structured aggregation schemes to appropriately represent a complex system, and demonstrate how the model can be used to quickly predict system performance, which facilitates effective capacity allocation decision making. Using simulation as a benchmark, we show that our model produces results within 5% accuracy at a fraction of the time of simulation, even at high traffic intensities. This knowledge helps managers quickly analyze the performance of the system and better plan server capacity to maintain desirable levels of QoS. We also demonstrate how to utilize a combination of dedicated and shared resources to achieve QoS using fewer servers.

关键词： Capacity Planning and Allocation Markov Decision Process Quality of Service Queuing Theory Services web-based applications

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web Engineering Process Matrix for Sustainable Deployment of web-based applications

Web Engineering Process Matrix for Sustainable Deployment of...

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7th International Conference on Cooperative Design, Visualization, and Engineering

作者： Tumin, Sharil Encheva, Sylvia Univ Bergen IT Dept POB 7800 N-5020 Bergen Norway Stord Haugesund Univ Coll N-5528 Haugesund Norway

ISBN: (纸本)9783642160653

Sustainable deployment needs a clear cooperative model of actors during different phases of planning, design, implementation and maintenance for a web-based application project. Solving web engineering problems involves multifaceted working stages, multi-domains expertise and multidisciplinary workers. The key to success is effective communication among actors. Actors can be both active and passive, either humans or non-human entities. Cooperative models can ensure effective flow of information between actors at all stages.

关键词： cooperative model process matrix sustainable deployment web-based applications effective communication

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Automatic Physical Database Tuning Middleware for web-based applications

Automatic Physical Database Tuning Middleware for Web-Based ...

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15th International Conference on Advances in Databases and Information Systems

作者： Patvarczki, Jozsef Heffernan, Neil T. Worcester Polytech Inst Dept Comp Sci Worcester MA 01609 USA

ISBN: (纸本)9783642237362;9783642237379

In this paper we conceptualize the database layout problem as a. state space search problem. A state is a given assignment of tables to computer servers. We begin with a database and collect, for use as a workload input, a sequence of queries that were executed during normal usage of the database. The operators in the search are to fully replicate, horizontally partition, vertically partition, and de-normalize a table. We do a time intensive search over different table layouts, and at each iteration, physically create the configurations, and evaluate the total throughput of the system. We report our empirical results of two forms. First, we empirically validate as facts the heuristics that Database Administrators (DBAs) currently use as in doing this task manually: for tables that have a high ratio of update, delete, and insert to retrieval queries one should horizontally partition, but for a small ratio one should fully replicate a table. Such rules of thumb are reasonable, however we want to parameterize some common guidelines that DBAs can use. Our second empirical result is that we applied this search to our existing data test case and found a reliable increase in total system throughput. The search over layouts is very expensive, but we argue that our method is practical and useful, as entities trying to scale up their web-based applications would be perfectly happy to spend a few weeks of CPU time to increase their system throughput (and potentially reduce the investment in hardware). To make this search more practical, we want to learn reasonable rules to guide the search to eliminate many layout configurations that are not very likely to succeed. The second aspect of our project (not reported here) is to use the created configurations as input into a machine learning system, to create general rules about when to use the different layout operators.

关键词： Database tuning partitioning layout search web-based applications

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Experience using formal methods for capturing requirements of web-based applications 1

Experience using formal methods for capturing requirements o...

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1st IEEE International Conference on Cognitive Informatics (ICCI 2002)

作者： Redouane, A High-Tech Consultant Canada

ISBN: (纸本)0769517242

The current practice in capturing requirements of web-based applications is accomplished by an ad-hoc and informal manner. In this paper we investigate the use of formal methods to formalize the requirements of a web-based application. We have used a simple yet powerful Definitional Specification Language (DSL) for this task. DSL is based on first order predicate calculus, and has three main concepts: a resource, a transitional, and a state type. These concepts help in specifying dynamic behaviors and the resultant specification is clear with no cumbersome manipulation of time variables. A brief description of DSL is given before we provide the informal requirements of our web-based application. We formalize the requirements using DSL and describe how this is done. We conclude that the benefits gained with such formalization have made the development clear and minimized the cycle of fix-and-test.

关键词： web-based applications formal methods predicate calculus dynamic behavior modularity and parameterization

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