E-Business Transaction Management in Web-Integrated Network Environment

Author(s):  
V. K. Murthy

This chapter describes the Operational Models, Programming Paradigms and Software Tools needed for building a Web- integrated network computing environment. We describe the various interactive distributed computing models (client server-CS, code on demand, remote evaluation, mobile agents, three and N-tier system), different logical modes of programming (imperative, declarative, subjunctive, and abductive), transaction and workflow models (that relax atomicity, consistency, isolation, durability and serializability properties), new protocols, and software tools (PJava/JDBC) that are needed. Some important application areas of these models are for telediagnosis and cooperative problem solving.

NeuroImage ◽  
2020 ◽  
Vol 216 ◽  
pp. 116867
Author(s):  
Zsolt Beda ◽  
Steven M. Smith ◽  
Joseph Orr

Author(s):  
Stefan Trausan-Matu

This chapter presents a model for hybrid and collaborative learning based on an analogy with musical polyphony, starting from Bakhtin’s ideas of dialogism. The model considers different voices (participants) inter-animating and jointly constructing a coherent tune (a solution, in problem solving), enabling other voices to adopt differential positions and to identify dissonances (unsound approaches). This chapter introduces also software tools, which visualize the discussion threads in a chat and the influences that an utterance has on the subsequent ones. Such tools help both teachers and learners to evaluate and enhance the learning process. The model helps to understand how learners inter-animate when they participate to collaborative chats for problem solving or other learning activities, including Hybrid Learning.


2012 ◽  
pp. 153-184 ◽  
Author(s):  
Marcos Dias de Assunção ◽  
Rajkumar Buyya

This chapter first presents taxonomies on approaches for resource allocation across resource sharing networks such as Grids. It then examines existing systems and classifies them under their architectures, operational models, support for the life-cycle of virtual organisations, and resource control techniques. Resource sharing networks have been established and used for various scientific applications over the last decade. The early ideas of Grid computing have foreseen a global and scalable network that would provide users with resources on demand. In spite of the extensive literature on resource allocation and scheduling across organisational boundaries, these resource sharing networks mostly work in isolation, thus contrasting with the original idea of Grid computing. Several efforts have been made towards providing architectures, mechanisms, policies and standards that may enable resource allocation across Grids. A survey and classification of these systems are relevant for the understanding of different approaches utilised for connecting resources across organisations and virtualisation techniques. In addition, a classification also sets the ground for future work on inter-operation of Grids.


2021 ◽  
pp. 71-76
Author(s):  
Shanti Swarup Jana ◽  
Satyajit Kar

Scaffolding i.e. making a difcult task simpler by the variation in momentary assistance on demand is a useful strategy for learning science. Children gradually become the independent learners keeping instructor as facilitator after the responsibility for task performance transferred to their cognitive reach. The present study is experimentally designed to enquire the effects of scaffolding on science achievement after the incorporation of specic experimental manipulations. Eighty 6th standard learners of a WBBSE run Bengali medium regular govt.-aided co-educational rural HS school in South 24 Parganas district, W. B. constitute the sample of the study – divided into two equivalent halves through randomisation after the administration of entry-level pre-test – impartially for one half (40) treated with Problem Solving Method (PSM) of teaching and the rest (40) by Play Way Method (PWM) of instruction for the transaction of selected science lessons in three units. The data collection process involves the administration of two scales PPPSSLQ and SAT in three units to assess peers scaffolding and achievement respectively of the two groups after the instructions of nearly two months duration. Peers scaffolding is found to be independent of the applied variation in teaching methods i.e. PSM and PWM of teaching. The study discloses peers scaffolding to be signicantly effective merely on Unit III science achievement for the learners instructed by PSM of teaching and for the analysis merged for the differentially treated all the sample. But no signicant effect of peers scaffolding on achievement is observed in case of PWM of teaching.


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