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A practical testing level 1 of the road freight operator in Thailand's logistics professional qualification system has three stations: receiving, placement, and delivery. The number of examinees and the capability of officers in each station affect the complete number of examinees in limited time and average cost per examinee. In this article, the Markov chains model is used to describe the testing...
One of the most critical and costly decisions made in emergency departments (EDs) is whether to admit a patient into the hospital. These decisions require investment in time for patient testing and treatment, delaying care to other patients. Short-stay units (SSUs) are an alternative to discharging or fully admitting ED patients, allowing extended patient observation. However, little is understood...
Stored procedures in database management systems are often used to implement complex business logic. Correctness of these procedures is critical for correct working of the system. However, testing them remains difficult due to many possible states of data and database constraints. This leads to mostly manual testing. Newer tools offer automated execution for unit testing of stored procedures but the...
In the last few decades, the performance analysis of multi-server has become a research hotspot. We consider a distributed server system in which heterogeneous servers operating under the processor sharing(PS) discipline. In this system, when a stream of users' requests arrive at a dispatcher, it will dispatch each user to different servers respectively. In this paper, we analyze the performance of...
Multi-tiered transactional web applications are frequently used in enterprise based systems. Due to their inherent distributed nature, pre-deployment testing for high-availability and varying concurrency are important for post-deployment performance. Accurate performance modeling of such applications can help estimate values for future deployment variations as well as validate experimental results...
Communicating systems are today composed of a huge number of distributed processes interoperate with diverse kinds of applications, services and actors. It therefore becomes crucial to monitor and manage these trustworthy interactions. For that purpose, passive testing techniques have been used particularly for checking the system conformance w.r.t. Its standard. Among these studies, trust behaviors...
Load testing of IT applications is fraught with the challenges of time to market, quality of results, high cost of commercial tools, and accurately representing production like scenarios. It would help IT projects to be able to test with a small number of users and extrapolate to scenarios with much larger number of users. This in turn will cut down cycle times and costs and allow for a variety of...
We propose a novel approach that merges implied scenarios and race condition analysis techniques, to systematically detect and analyse security-related vulnerabilities at the architectural level. We apply our approach to an industrial case related to architecting systems interfacing the cloud. The application demonstrates an effective use of the approach, where the approach has detected securityrelated...
Several studies have been carried out on software bugs analysis and classification for life and mission critical systems, which include reproducible bugs called Bohrbugs, and hard to reproduce bugs called Mandelbugs. Although software reliability in IT systems has been studied for years, there are only a few formal analytic models for recovery from Mandelbugs. This paper discusses in detail several...
The region weather modification information operation conditions website system for integrated monitor and analysis based on B/ S (Browser/ Server) mode is developed, which is to meet the need of the weather modification professional work. The system is developed by using the .NET platform and ASP.NET technology. Applying the WebGIS technology, weather modification map release can be realized by using...
The Web service (WS) paradigm is an emerging approach to building Web applications, in which software designers typically build new WSs by leveraging existing, third-party WSs. Understanding performance characteristics of third party WSs is critical to the overall system performance. Although such performance evaluation can be done through testing of third party WSs, it is quite an expensive process...
To simulate user's behaviors more realistically, this paper proposes a novel hierarchy testing framework and method for Web applications performance. It extracts the access information from Web log files and builds a hierarchical structure model (HSM) by statistical analysis, obtains the test path with higher probability based on HSM model, and tests Web applications performance by using this path...
Ubiquitous questionnaire is to provide users with e-questionnaire services anytime and anywhere such that one can use e-questionnaire servers without even thinking about them. An e-questionnaire server for ubiquitous questionnaire should provide guarantees to satisfy any user-specified requirement on information assurance, privacy, and security because some questionnaires may concern organization...
An extend vulnerability testing method for communication protocol is brought forward first, which is combined protocol Syntax analysis with Petri Net system. Then vulnerability testing of implementation of WAP protocol is made and the process is analyzed to prove the feasibility of the method.
Ajax is an emerging Web engineering technology that supports advanced interaction features that go beyond Webpage navigation. The Ajax technology is based on asynchronous communication with the Web server and direct manipulation of the GUI, taking advantage of reflection.Correspondingly, new classes of Web faults are associated with Ajax applications.In previous work, we investigated a state-based...
Recently Web applications have grown rapidly and have become more and more complex. As Web applications become more complex, there is a growing concern about their quality. But very little attention is paid to Web applications testing and there are scarce practical research efforts and tools. Thus, in this paper, we suggest the automatic generation methods of test environments and a prototype of an...
In 2002 we proposed a method to reverse engineer a Web application model. The proposed method deals with dynamic Web applications, consisting of server components, typically interacting with a persistent layer, which build the Web pages displayed on the browser dynamically. Dynamic analysis and page merging heuristics were used for model extraction. The proposed model was successfully adopted in the...
Load testing of Web applications can be specified by simulating realistic user behavior with stochastic form-oriented analysis models. Stochastic models have advantages over load test models that simply play back recorded session data: they are easier to specify and achieve a higher coverage of the different operational paths. There are challenges when specifying load tests such as the generation...
The High Performance Computing Modernization Program (HPCMP) was initiated in 1992 in response to congressional direction to modernize the Department of Defense (DoD) laboratories' high performance computing (HPC) capabilities. The HPCMP provides the supercomputer services, high-speed network communications, and computational science expertise that enables the Defense laboratories and test centers...
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