Wireless sensor networks (WSNs) pose novel challenges compared with traditional networks. To answer such a new communication paradigm, data-centric communication, is emerging. One form of the publish/subscribe messaging system. Compared other variants, systems are common and wide-spread in distributed computing. Thus, extending intoWSNs will simplify integration applications applications. This paper describes MQTT-S [1], an extension open protocol message queuing telemetry transport (MQTT)...

Smart manufacturing is strongly correlated with the digitization of all activities. This increases amount data available to drive productivity and profit through data-driven decision making programs. The goal this article assist engineers in designing big analysis pipelines for process data. Thus, paper characterizes requirements surveys existing platforms from academic literature. results demonstrate a stronger focus on storage phases than ingestion, communication, visualization stages....

Purpose This survey aims to study and analyze current techniques methods for context‐aware web service systems, discuss future trends propose further steps on making services systems context‐aware. Design/methodology/approach The paper analyzes compares existing service‐based based they support, such as context information modeling, sensing, distribution, security privacy, adaptation techniques. Existing are also examined in terms of application domains, system type, mobility...

Abstract Performance engineering of parallel and distributed applications is a complex task that iterates through various phases, ranging from modeling prediction, to performance measurement, experiment management, data collection, bottleneck analysis. There no evidence so far all these phases should/can be integrated into single monolithic tool. Moreover, the emergence computational Grids as common wide‐area platform for high‐performance computing raises idea provide tools interacting Grid...

We present the ASKALON environment whose goal is to simplify development and execution of workflow applications on Grid. centered around a set high-level services for transparent effective Grid access, including Scheduler optimized mapping workflows onto Grid, an Enactment Engine reliable application execution, Resource Manager covering both computers components, Performance Prediction service based training phase statistical methods. A sophisticated XML-based programming interface that...

Engineering Internet of Things (IoT) and cloud services to provide a coherent software layer for continuous deployment, provision, execution applications various domains is complex. The authors consider whether IoT systems could uniform enable complex consisting diverse types components, although these are built by integrating blending infrastructures with cloud-based datacenters. analyze requirements perspectives engineering such discuss the main principles that should be supported. They...

Cloud computing's success has made on-demand computing with a pay-as-you-go pricing model popular. However, cloud focus on resources and costs limits progress in realizing more flexible, adaptive processes. The authors introduce elastic processes, which are based explicitly modeling resources, cost, quality, show how they improve the state of art.

The forthcoming two-satellite GMES Sentinel-1 constellation is expected to render systematic surface soil moisture retrieval at 1 km resolution using C-band SAR data possible for the first time from space. Owing constellation's foreseen coverage over Land Masses acquisition region-global approximately every six days, nearly daily Europe and Canada depending on latitude-in high spatial radiometric Interferometric Wide Swath (IW) mode, mission shows potential global monitoring of by means...

Cloud computing is ever stronger converging with the Internet of Things (IoT) offering novel techniques for IoT infrastructure virtualization and its management on cloud. However, system designers operations managers face numerous challenges to realize cloud systems in practice, mainly due complexity involved provisioning large-scale diversity their requirements terms resources consumption, customization capabilities runtime governance. In this paper, we introduce concept software-defined...

The Internet of Things (IoT) is becoming increasingly ubiquitous, acting as an important source real-time data for various applications. By allowing exchange between parties along the IoT devices-Edge-Cloud computing continuum, larger societal benefits can be achieved. Assuring security and fostering confidence sharing, however, one biggest obstacles. Sharing originating from connected devices crucial to real-world intelligent applications, i.e., based on artificial intelligence/machine...

As collaborative Web-based platforms evolve into service-oriented architectures, they promote composite and user-enriched services. In such platforms, the collaborations typically involve both humans software services, thus creating highly dynamic complex interactions. However, today's collaboration tools don't let specify different interaction interfaces (services), which can be reused in various collaborations. Furthermore, need more ways to indicate their availability desire participate...

Elasticity in cloud computing is a complex problem, regarding not only resource elasticity but also quality and cost elasticity, most importantly, the relations among three. Therefore, existing support for controlling applications, focusing solely on scaling, adequate. In this paper we present SYBL - novel language applications its runtime system. allows specifying detail monitoring, constraints, strategies at different levels of including whole application, application component, within...

With the offer from cloud computing providers, scientists have opportunity to utilize pay-as-you-go resources together with their own and shared resources. However, need decide which parts of applications should be executed in systems order balance trade-off between cost, time resource requirements. In this paper, we present a service for estimating, monitoring analyzing costs associated scientific cloud. Cost models different application execution are proposed these cost can composed...

Praise, pay, and promote crowd-member workers to elicit desired behavioral responses performance levels.

Abstract Limitations of sensors and the situation a specific measurement can affect quality context information that is implicitly collected in pervasive environments. The lack about Quality Context (QoC) result degraded performance context-aware systems environments, without knowing actual problem. Context-aware take advantage QoC if producers also provide metrics along with information. In this paper, we analyze present our model for processing metrics. We evaluate considering capabilities...

We present a simple but powerful dynamic link adaptation mechanism for wireless LANs, which are based on the IEEE 802.11a standard. Using this method, transmitter is able to detect whether quality of improving or deteriorating, and information switch higher lower transmission rate, respectively. For determining quality, employs only that available locally. Therefore, proposed method can be implemented without changes enhancements current 802.11 The efficiency our investigated evaluated by...

In complex emergency scenarios, teams from various emergency-response organizations must collaborate. These include both first responders, such as police and fire departments, those operators who coordinate the effort operational centers. The Workpad architecture consists of a front- back-end layer. front-end layer is composed several an integrated peer-to-peer network that lets collaborate through information exchange coordination. Team members at front end carry PDAs, with team leaders'...

Providing data as a service has not only fostered the access to from anywhere at anytime but also reduced cost of investment. However, is often associated with various concerns that must be explicitly described and modeled in order ensure consumer can find select relevant services well utilize right way. In particular, use bound rules imposed by owners regulators. Although, technically Web database technologies allow us quickly expose sources services, until now, research been focused on...

The prime objective of the present paper is to analyze performance HDLC Balanced Class Procedures, i.e., quantitatively study interaction among a multiplicity parameters which are procedure specific, characterize properties transmission medium, and identify operational characteristics requirements. approach taken consider two kinds operation: saturated case characterized by maximum throughput as most suitable measure performance, nonsaturated situation for waiting transfer times appropriate...

Cloud computing technologies have recently been intensively exploited for the development and management of large-scale IoT systems, due to their capability integrate diverse types devices support big data analytics in an elastic manner. However, diversity, complexity scale need handle large volumes a nontrivial manner, plethora domain-dependent controls, programming applications on cloud platforms still remains great challenge. To date, existing work neglects high-level models focuses...

The fast growth in the amount of connected devices with computing capabilities past years has enabled emergence a new layer at Edge. Despite being resource-constrained if compared cloud servers, they offer lower latencies than those achievable by Cloud computing. combination both and Edge paradigms can provide suitable infrastructure for complex applications’ quality service requirements that cannot easily be achieved either these alone. These very different each application, from achieving...

Cloud computing based Data-as-a-Service (DaaS) has become popular. Several data assets have been released in DaaSes across different cloud platforms. Nevertheless, there are no well-defined ways to describe and their associated assets. On the one hand, existing DaaS providers simply use HTML documents service. This simple way of service description requires user manually perform lookup by reading understand as well provided other techniques not suitable for describing because they consider...