Web Services Technology Research Articles

Cloud service composition using minimal unsatisfiability and genetic algorithm

SummaryThe software‐as‐a‐service layer of cloud computing has evolved much interest among the researchers in the academic and industry worlds. It is based on service‐oriented architectures and web service (WS) technology, which are used to offer a remotely accessible application. When a single WS is unable to satisfy all the customer's requirements, a WS composition (WSC) method is applied to connect together various available WSs for building distributed application, using discovery, compatibility checking, selection, and deployment steps. This paper has two‐fold contributions: The major one is the proposition of a new algorithm based on minimally unsatisfiable subset formal algorithm to compose WSs. This contribution ensures a faster WSC, which is prominent in an online context. The second contribution is the proposition of a new penalty‐based genetic algorithm to identify near‐optimal solutions whenever an exact one is not identified using our formal algorithm. Indeed, in some cases, many available WSs provide overlapping/identical functionality; in this context, the choice of participated services is given using quality of service. This work proposes a WSC ensuring to find out an exact or a near‐optimal solution according to the user need. A set of experimentations is applied to validate our contributions.

Design of Android Warehouse Management Software based on Web Service

In the light of existing problems of computer-side warehouse management system, this paper puts forward developing an Android software and introduces smart phones to warehousing management. System adopts C/S three-layer architecture including the database layer, the service layer and the user layer. The service layer uses Web Service technology to provide data exchange service for Android software and the database. As the supplement of computer-side warehouse management system, the android software has most functions of computer-side warehouse management system. It ensures workers conduct warehousing operations anywhere in the warehouse, increases the mobility of warehousing management and improves service level and efficiency of enterprise.

RESTFUL WEB SERVICE UNTUK INTEGRASI SISTEM AKADEMIK DAN PERPUSTAKAAN UNIVERSITAS PERJUANGAN

Perjuangan University is developing an information system in its campus, but the system is partially built. This has resulted in its own problems, there is no connectivity between systems and the difficulty of developing data integration. So that in the business process that occurs many experience difficulties in data synchronization and the amount of duplicate data that must be entered. One solution to overcome this problem is to utilize web service technology. The web service architecture used is REST. REST as a bridge that is able to integrate data in a stateless format. The results of the application of the web service as a backend system are able to integrate the existing academic information systems and library information systems without changing existing structures, programs or architecture. Format data exchange between systems using the JSON format. In addition, officers do not need to input and verify data several times, when the data in the library information system changes automatically in the academic information system the changes are immediately read.

PENGEMBANGAN SISTEM INFORMASI PELATIHAN BERBASIS WEB MENGGUNAKAN TEKNOLOGI WEB SERVICE DAN FRAMEWORK LARAVEL

Pincher ID is a local startup that engaged in the education sector especially for providing training classes. For now, Pincher ID based on a mobile application that causes only a third party (Google Play store/ App Store) who can access it. Furthermore, mobile application Pincher ID is not indexed by search engine so it makes difficult for people to find it. In this research, training information system web-based with web service technology and framework Laravel will be built. Web service technology applied to the system for data integration so data can be stored centrally. The architecture of web service used in the system is REST because accessing REST with URL address on browser application, give easy access to the application. In this research, prototype method used to develop an information system based on a website that can be used by Pincher ID. The test result showed that the training information system worked well and in accordance with the user’s wishes.

تصميم وتنفيذ شفرة تتبع لمنتجات التمور طبقا لنظام الترميز UCC / EAN-128

Recently, the food safety issue of agricultural products has attracted focus all over the world. Due to a long supply chain compared with the animal or other kinds of products and the complex processes with huge links. The Food safety traceability system (FTS) is an effective way to verify of food safety and healthy. This research was designed and implemented traceability barcode for an agricultural product (Dates) followed the common encoding scheme (UCC/EAN128) with enhancing by added human readable information about the most significant data for the end consumer such as expire and production date. The proposed system takes DTS barcode as an information carrier which identifies dates products closely related to farming, processing, packing, transportation and distributing. DTS adopts on Web Service Technology for tracing and extracting all information related to the date product using barcode. Customers can scan or typing the barcode in the system website. The Web Service interface provided by DTS will return all traceability information to the end consumer. Using the proposed code has proved by practice that it can extract all information in high accurate level as well as acceptance from the end consumer because important information is written in a language he/she understands.

Web Services in the Internet of Things and Smart Cities: A Case Study on Classification Techniques

Consumer electronics (CE) are considered an indispensable and inseparable part of the Internet of Things (IoT). The four-layer architecture of the IoT includes CE devices as its core layer. Furthermore, the IoT provides all necessary infrastructures for realization of the smart city concept. Various services offered in a smart city are implemented with the help of web service technology, and there are multiple web services offering identical functionality. Selecting the most appropriate web service to obtain the desired functionality is a fundamental problem in smart city development. In this article, a tripplanning case study is discussed to highlight the role of web services in a smart city, and six learning models for web service classification are described.

The Implementation Of Customer Relationship Management (CRM) With Service Oriented Architecture (SOA) to Improve Customers’ Loyalty

PT. Astra International Tbk - Honda (Astra Motor Indralaya) is a company which is engaged in the sale of products and services. Astra Motor often has problems such as product information distribution using brochure causing the effort not to be maximum. It also causes information delivery to customers to be inaccurate. There is also another problem which is the booking time that takes too long either for a motorcycle or spare parts. Therefore, the researchers are attempting to make a software using Service Oriented Architecture (SOA) by leveraging web services technology. SOA is a form of technology architecture that follows the principles of service orientation (service-oriented).

Интернет-портал для решения научных и инженерных задач

Приведены описание, архитектура и сервисы инженерного вычислительного портала, представляющего собой комплексное решение для организации доступа к высокопроизводительным вычислительным ресурсам, кооперации специалистов из разных областей для решения сложных вычислительных задач, проведения вычислительных экспериментов и обучения параллельным технологиям. Goal. The project aimed at designing web-oriented high technology software and hardware complex (engineering and computational portal) to solve scientific and experimental problems which are carried out at Kemerovo State University. The project is considered to be unique, because three options, namely solution of engineering problems, performance of computational experiments based on high performance resources and educational services dedicated to theory and technology of high performance computations are combined. Methods. The architecture of the engineering and computational portal was designed with the help of a service-oriented method. This method is used to create distributed systems that have services for other systems or other services. The service-oriented method simplifies integration of new components to improve the portal’s options. The applied technology of web services is based on the following standards: WSDL - web service description standard, SOAP - web service interaction message format and BPEL - business processes description standard (orchestration), as well as portlet technology. The following tasks have already been accomplished: ∙ the web portal has been created on the basis of Liferay web platform; ∙ the service for user files storage management has been implemented; ∙ the service to solve flooded mine problem has been implemented; ∙ “Onlide” system has been developed in order to create software parallel user-code and start it on the basis of high performance resources; ∙ both components to register computational resources and to allow access to them have been implemented; ∙ “Virtual Laboratory Practicum” has been integrated as an educational element. Summary. The described engineering and computational portal is heavily employed at Kemerovo State University in order to perform computational experiments based on the high performance resources and to teach theory and technology of high performance computations. Future plans are as follows: implementation of the component to interact with the portal experts, “Master” component implementation, that is considered to be a portal guide, implementation of computational resources accounting components, implementation of the high-performance leased components, expansion of computational services list, implementation of the service to solve the problem of gas-dispersion gas/particle mixture combustion that applies Phoenics CFD technology.

Towards Effective Service Discovery using Feature Selection and Supervised Learning Algorithms

With the rapid development of web service technologies, the number and variety of web services available on the internet are rapidly increasing. Currently, service registries support human classification, which has been observed to have certain limitations, such as poor query results with low precision and recall rates. With the huge amount of available web services, efficient web service discovery has become a challenging issue. Therefore, to support the effective application of web services, automatic web service classification is required. In recent years, many researchers have approached web service classification problems by applying machine learning methods to automatically classify web services. The ultimate goal of our work is to construct a classifier model that can accurately classify previously unseen web services into the proper categories. This paper presents an intensive investigation on the impact of incorporating feature selection methods (filter and wrapper) on the performance of four state-of-the-art machine learning classifiers. The purpose of employing feature selection is to find a subset of features that maximizes classification accuracy and improves the speed of traditional machine learning classifiers. The effectiveness of the proposed classification method has been evaluated through comprehensive experiments on real-world web service datasets. The results demonstrated that our approach outperforms other state-of-the-art methods.

Exploring cloud-based Web Processing Service: A case study on the implementation of CMAQ as a Service

As an important tool for air quality simulation, the Community Multiscale Air Quality (CMAQ) model is widely used in the environmental modeling community. However, setting up and running the CMAQ model could be challenging for many scientists, especially when they have limited computing resources and little experience in handling large-scale input data. In this study, we explore the cloud-based Web Processing Service (WPS) and present the Cloud WPS framework to support implementing Earth science model as WPS. Specifically, to make CMAQ easier to use for scientists through the latest standard-based Web service technology, CMAQ-WS, a prototype of CMAQ as a Service, is developed and tested. The result of the experiment shows the framework significantly improves not only the performance of but also ease of use of the CMAQ model thus providing great benefits to the environmental modeling community. Meanwhile, the proposed framework provides a general solution to integrate Earth science model, WPS, and cloud infrastructure, which can greatly reduce the workload of Earth scientists.

Change management of service-based business processes

Service-oriented computing paradigm and web service technologies facilitate cross-organizational cooperation. The business processes of involved organizations are referred to as service-based business processes (SBPs). The dynamic nature makes SBPs subject to changes in the internal and external requirements. It is critical to have a method to manage changes in SBPs. In this work, we propose a Petri net-based model with the correctness verification capability for modeling. We also identify a set of SBP change patterns. An SBP change management framework is proposed with a demonstration. Even though the problem of change management has been extensively studied in BPM field and web service field, existing approaches are limited to deal with the diversity of the SBP components and the complexity of the dependencies among these components.

An QoS based multifaceted matchmaking framework for web services discovery

With the increasing demand, the web service has been the prominent technology for providing good solutions to the interoperability of different kind of systems. Web service supports mainly interoperability properties as it is the major usage of this promising technology. Although several technologies had been evolved before web service technology and this has more advantage of other technologies. This paper has concentrated mainly on the Multifaceted Matchmaking framework for Web Services Discovery using Quality of Services parameters. Traditionally web services have been discovered only with the functional properties like input, output, precondition and effect. Nowadays there is an increase in number of service providers leads to increase in the web services with same functionality. So user need to discover the best services so Quality of Service factors has been evolved. The traditional discovery supports only few quality parameters and so the discovery is easy in retrieval of services. As the parameter increases the matchmaking will be complex during service discovery. So in this proposed work, we have identified 21 QoS parameters which are suitable for service discovery. The information retrieval techniques are used to evaluate the results and results show that the proposed framework is better.

CITYGML RESTFUL WEB SERVICE: AUTOMATIC RETRIEVAL OF CITYGML DATA BASED ON THEIR SEMANTICS. PRINCIPLES, GUIDELINES AND BLDG CONCEPTUAL DESIGN

Abstract. CityGML is considered an optimal standard for the representation of 3D city models. However, due to its complex structure, easy-to–use data retrieval is important, in terms of interoperability. This implies choosing the implementation of Web Service Technologies and in particular the WFS, as the most suitable OGC standard for retrieving the real geometry data. Nevertheless, this standard serves data mainly based on their geometry, while CityGML also covers topology and more importantly semantic aspects of 3D city models. Therefore, this paper examines and presents the new CityGML RESTful Web service, instead of the OGC WFS. This Web Service is conceptually designed to achieve CityGML data retrieval based on their semantics characteristics. In this context, several principles and guidelines of the new CityGML RESTful Web service are described and the “CityModels” resource is presented. Additionally, the conceptual design of the bldg resource and its child resources based on the level of details is also presented.

Planting time determination for food crops using decision tree

Before the world experienced climate change, people can predict rainy and dry seasons easily. It is because the period is fixed throughout the year. The industrial revolution has caused global warming and affect climate change resulting in climate anomalies may decrease or increase in air temperature extreme, rainfall and seasons are shifting from the usual pattern and not erratic as well as rising sea levels and the occurrence of rob in some areas including in Indonesia. As consequence, the planting period is become difficukt to predict. Climatic factors, especially temperature, humidity, and rainfall strongly influences the process of determining the planting period for food crops. The domino effect of this mistake stimulates pest explosions, increased production costs as well the difficulty of providing food in the market. One of the technologies to assist farmers in determining the planting period is based on climate predictions from BMKG and data on food crops from the Dinas Pertanian. The process of extraction of climate data from BMKG can be applied with webservice technology. The process of determining the planting period and selection of the appropriate plant species is the application of data mining using the method of decision tree. The data in the process in this study is weather and harvest data in 2014 to 2016. The results of this study is an application that can facilitate farmers in determining the right planting or type of seeds.

A Conceptual modelling of QOS’ Web Service Framework

The evolution of web service technologies is well known in many organizations. When many organizations want to develop our business, they will add new services in their businesses policy, these additions may help the organization to increase some policy but it is difficult to implement some requirements. To solve this problem, we present the new paradigm of QOS for develop web service that is the procedure to implement web service and help developer to create service appropriate each business process. This conceptual of modelling based on LSS and BWW framework and under business practice guideline the example is Cobit and ITIL for approximate each of business process. In success, we illustrate our approach by class diagram that design under conceptual of modelling quality of service for web service and implement web service for test this idea. Then we choose 2 scenarios in different combination of QoS requirements for test, the results show that this technique is satisfy for choose and we think this paper can be guideline for researcher in the future.

E-Referral System Modeling Using Fuzzy Multiple-Criteria Decision Making

<p class="Abstract"><span lang="EN-US">Currently, the quality of health services in Indonesia is getting better. However, the referral system still has some problems. The first is the difficulty in determining the referral hospital by the condition of the patient. The second is the different parameters used to determine the referral hospitals between countries. Based on those problems, it is necessary to improve the ability of the current referral system. This study developed a reference system model for assessing the suitability of the patient's background with the referral hospital. Some of the methods used are restful on web service technologies for information exchange between primary health care doctors and referral hospitals, Fuzzy Multiple-Criteria Decision Making (FMCDM) to determine the ranking of referral hospitals that fit the patient's background. The result of this study is an intelligent system model to get the referral hospital that fit the patient's background.</span><em></em></p>

A MaxSAT based approach for QoS cloud services

ABSTRACT Web Services technologies are operated to build Software as a Service (SaaS) layer in the Cloud Computing. It happens that a single Web Service does not respond to customer's request. In this case, one needs to compose several distributed Web Services in order to achieve the customer's goal and allow interaction between heterogeneous applications. In this paper, a new approach for QoS Web Services problem is proposed. It is based on an original encoding using satisfiability problem. To minimise the composition and also take into account user preferences, an objective function is used leading to the known Maximum Satisfiability problem (MaxSAT). Such formulation is flexible and allows to introduce constraints in order to seek for specified Web Services Composition. Experimental evaluation on some generated instances shows the feasibility of our proposed approach.

Online reliability time series prediction via convolutional neural network and long short term memory for service-oriented systems

With the development of Web service technology, more and more enterprises choose to publish their own services on the Internet. However, with the increasing demands of users, it is difficult for a single service to meet the complex user requirements. To address this challenge, multiple services can be integrated by leveraging the service-oriented architecture (SOA) to generate a value-added service, referred to a service composition, where the component services are loosely coupled. However, due to the dynamic running environment, the performance of each component service (including reliability) may fluctuate. This will introduce cascading effects, which could cause the entire service system to fail. Since component services run in a dynamic environment, the parameters used to conduct reliability prediction are difficult to obtain. Therefore, online reliability prediction that ensures the runtime quality poses a grand challenge. This paper analyzes the historical response time series and throughput time series of component services, and predicts the reliability in the near future. To guarantee the stable and continuous operation of a service system, we proposed an online reliability time series prediction method by combining a Convolutional Neural Network (CNN) and Long Short Term Memory (LSTM). The proposed approach, referred to as CL-ROP, is able to predict the reliability of a service system in the near future. We conducted a series of experiments over real service data and compared with other competitive approaches to demonstrate the effectiveness of the proposed approach.

Designing an Android-Based Application for Geohazard Reduction Using Citizen-Based Crowdsourcing Data

Application development based on mobile platform is regarded as one of the major trends in information communication technology. However, only a few cases of mobile application are available for geohazard reduction using citizen-based crowdsourcing data. With the development of geohazard informatization and the rapid progress of mobile technology, the design and implementation of phone-based applications that could be used to monitor and prevent geohazards have been received increasing attention. Aiming at minimizing the threat of geohazards to people’s lives and assets, this paper presents an android-based application named Geohazards Group Measurement and Guards against System (GGMGAS). Local villagers use the GGMGAS to collect field data, including photos and videos, and transmit them to a database server. Therefore, the efficiency and stability of the data exchange between the mobile phone and the database server is very important. A design method and system solution of a data-exchange scheme was designed based on the WebService technology. Through trial operation, it has been found out that this data-exchange scheme could greatly improve the communication efficiency and the stability of collected field data. Practice has proved that this method based on citizens’ crowdsourcing data can effectively reduce the losses caused by geohazards.

Optimization of Web Service-Based Control System for Balance Between Network Traffic and Delay

In Internet of Things systems, Web services enable interoperable machine-to-machine communication over networks. Polling mechanism is a practical way for a Web service-based control system to enable its actuator to respond to its controller under uncertain environments where the actuator does not know exactly when the controller updates its command. Fast response demands a high polling frequency (polling mechanism handles the event in time-driven mode) which may lead to heavy network traffic. Therefore, how to make the optimal tradeoff between the network traffic and delay in a Web service-based control system becomes an interesting problem. This paper formulates the problem of finding the optimal polling frequency control policy of a Web service-based control system as a constrained Markov decision process (CMDP). The policy is such that the actuator responds to the controller within a tolerable delay threshold while minimizing network traffic. An algorithm called CMDPA is proposed to solve the problem. Simulation and field experiments show our policy performance. Note to Practitioners —This paper addresses the interesting problem of making a good tradeoff between network traffic and delay demand in a Web service-based control system setting. It helps to improve the operation efficiency of Internet of Things systems that use the Web service technology to carry out communication between controllers and actuators while keeping delay within a given range. Our simulation and experimental investigations show that the solution developed here outperforms current solutions, such as time-driven or event-driven solutions.