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This paper is focused on analyzing the details of one of the most widely used Q&A technical discussion forums on the Internet: StackOverflow. StackOverflow is a huge source of information for both academics and industry practitioners and its analysis can provide useful insights. This is evident by a growing body of work dedicated to the study of this(More)
Selecting the optimal service from a set of functionally equivalent services is non-trivial. Previous research has addressed this issue making use of Quality of Service (QoS) attributes of the candidate services. In doing this, researchers have however assumed that the customers' preference of the various QoS attributes varies linearly with the actual(More)
The widespread adoption of service oriented architecture owes its popularity to service composition, where several web services are combined dynamically at runtime. As is evident today, the Internet is evolving towards the 'Future Internet'. In this context, web service composition has to deal with the problems of mobility, fault tolerance, reliability and(More)
Service composition is an effective practice to perform complex tasks through varied configurations of simple services. An issue that often arises in such a set-up is the selection of the best service from a group of functionally equivalent ones to cater to each of the various functionalities of the composite application. Previous effort in this direction(More)
Mobile devices are evolving as a new computing platform and a common means to provide access and process digital information. In the move to achieve ubiquitous computing, the role of mobile devices and web services cannot be understated. Mobile devices are predominantly in use for accessing web services. The same mobile devices are now becoming a feasible(More)
Dynamic Service composition is the art of composing a composite application from a set of service offerings from various providers at run time. Service composition is a complex task and the problem is with the construction of hierarchies of service providers where each service provider processes only a part of the application. This is further exacerbated by(More)
Selecting an optimal service from a group of functionally equivalent ones is non-trivial. This is more so when the service to be selected is part of a composite application. Research in the past has resolved this issue making use of the Quality of Service (QoS) attributes of the services to determine the most optimal from the functionally equivalents. This(More)
— In this paper, we study the problem of determining the optimal number of traffic and control channels in a packet based cellular system. We only consider systems where a given (total) number of available channels are divided into traffic and control channels. We first show how to compute the ratio of required traffic and control channels based on the(More)
In the plant pathogen Pseudomonas syringae, production of the exopolysaccharide levan is mediated by extracellular levansucrase (Lsc), which is encoded by two functional genes, lscB and lscC. Comparison of extracellular protein profiles of P. syringae pv. glycinea PG4180 grown at 18 and 28 degrees C and Western blots revealed that Lsc was predominantly(More)
Users interact with many electronic devices via menus such as auditory or visual menus. Auditory menus can either complement or replace visual menus. We investigated how advanced auditory cues enhance auditory menus on a smartphone, with tapping, wheeling, and flicking input gestures. The study evaluated a spindex (speech index), in which audio cues inform(More)