Architecture and Business Logic Specification for Dynamic Cloud Federations

Author(s):  
Ram Govinda Aryal ◽  
Jamie Marshall ◽  
Jörn Altmann
Keyword(s):  
2014 ◽  
pp. 79-130 ◽  
Author(s):  
Ales Novak

The term ?business model' has recently attracted increased attention in the context of financial reporting and was formally introduced into the IFRS literature when IFRS 9 Financial Instruments was published in November 2009. However, IFRS 9 did not fully define the term ‘business model'. Furthermore, the literature on business models is quite diverse. It has been conducted in largely isolated fashion; therefore, no generally accepted definition of ?business model' has emerged. Therefore, a better understanding of the notion itself should be developed before further investigating its potential role within financial reporting. The aim of this paper is to highlight some of the perceived key themes and to identify other bases for grouping/organizing the literature based on business models. The contributions this paper makes to the literature are twofold: first, it complements previous review papers on business models; second, it contains a clear position on the distinction between the notions of the business model and strategy, which many authors identify as a key element in better explaining and communicating the notion of the business model. In this author's opinion, the term ‘strategy' is a dynamic and forward-looking notion, a sort of directional roadmap for future courses of action, whereas, ‘business model' is a more static notion, reflecting the conceptualisation of the company's underlying core business logic. The conclusion contains the author's thoughts on the role of the business model in financial reporting.


2021 ◽  
Vol 11 (9) ◽  
pp. 4011
Author(s):  
Dan Wang ◽  
Jindong Zhao ◽  
Chunxiao Mu

In the field of modern bidding, electronic bidding leads a new trend of development, convenience and efficiency and other significant advantages effectively promote the reform and innovation of China’s bidding field. Nowadays, most systems require a strong and trusted third party to guarantee the integrity and security of the system. However, with the development of blockchain technology and the rise of privacy protection, researchers has begun to emphasize the core concept of decentralization. This paper introduces a decentralized electronic bidding system based on blockchain and smart contract. The system uses blockchain to replace the traditional database and uses chaincode to process business logic. In data interaction, encryption techniques such as zero-knowledge proof based on graph isomorphism are used to improve privacy protection, which improves the anonymity of participants, the privacy of data transmission, and the traceability and verifiable of data. Compared with other electronic bidding systems, this system is more secure and efficient, and has the nature of anonymous operation, which fully protects the privacy information in the bidding process.


2021 ◽  
Vol 17 (3) ◽  
pp. 1-35
Author(s):  
Juncheng Yang ◽  
Yao Yue ◽  
K. V. Rashmi

Modern web services use in-memory caching extensively to increase throughput and reduce latency. There have been several workload analyses of production systems that have fueled research in improving the effectiveness of in-memory caching systems. However, the coverage is still sparse considering the wide spectrum of industrial cache use cases. In this work, we significantly further the understanding of real-world cache workloads by collecting production traces from 153 in-memory cache clusters at Twitter, sifting through over 80 TB of data, and sometimes interpreting the workloads in the context of the business logic behind them. We perform a comprehensive analysis to characterize cache workloads based on traffic pattern, time-to-live (TTL), popularity distribution, and size distribution. A fine-grained view of different workloads uncover the diversity of use cases: many are far more write-heavy or more skewed than previously shown and some display unique temporal patterns. We also observe that TTL is an important and sometimes defining parameter of cache working sets. Our simulations show that ideal replacement strategy in production caches can be surprising, for example, FIFO works the best for a large number of workloads.


Author(s):  
Dumitru Dan Burdescu ◽  
Marian Cristian Mihaescu ◽  
Bogdan Logofatu
Keyword(s):  

Author(s):  
Wolfgang Ahrendt ◽  
Richard Bubel ◽  
Joshua Ellul ◽  
Gordon J. Pace ◽  
Raúl Pardo ◽  
...  

2016 ◽  
Vol 32 (2) ◽  
Author(s):  
Eric Kaarsemaker ◽  
Erik Poutsma

Employee ownership in the Netherlands Employee ownership has not been very common in the Netherlands, although the numbers are increasing. It is not unlikely to become a key measure amidst developments around wealth inequality, robotization and flexible working arrangements. Also, it has business logic. Nevertheless, government, unions, and employers' organisations have not been overly enthusiastic about employee ownership. However, employee ownership connects powerfully with direct and indirect forms of participation in decision-making, which are widespread in the Netherlands. Tax incentives might help set things in motion.


Author(s):  
Stephan Reiff-Marganiec ◽  
Manar S. Ali

This chapter presents a framework to provide autonomous handling of long running transactions based on dependencies which are derived from the workflow. Business Processes naturally involve long running activities and require transactional behaviour across them. This framework presents a solution for forward recovery from errors by automatic application of compensation to executing instances of workflows. The mechanism is based on propagation of failures through a recursive hierarchical structure of transaction components (nodes and execution paths). The authors discuss a transaction management system that is implemented as a reactive system controller, where system components change their states based on rules in response to triggering of events, such as activation, failure, force-fail, completion, or compensation events. One notable feature of the model is the distinction of vital and non-vital components, allowing the process designer to express the cruciality of activities in the workflow with respect to the business logic. Another novel feature is that in addition to dependencies arising from the structure of the workflow, the approach also permits the workflow designer to specify additional dependencies which will also be enforced. Thus, the authors introduce new techniques and architectures supporting enterprise integration solutions that cater to the dynamics of business needs. The approach is implemented through workflow actions executed by services and allows management of faults through a policy-driven framework.


Author(s):  
Giner Alor-Hernández ◽  
Viviana Yarel Rosales-Morales ◽  
Luis Omar Colombo-Mendoza

This chapter presents an overview of RIA features, and it explains the most important concepts for RIAs development, as well as their benefits and importance in several domains. In this chapter, a standard architecture for RIAs is described. This architecture has three well-defined layers: 1) the client-side that renders the rich user interface, 2) a controller layer where the business logic is executed, and 3) a data transactions manager. Important domains of Web development are presented, and in each one of them, the importance of RIAs is explained emphasizing particular features of each domain. Finally, experiences and successful stories of using RIAs in B2C e-commerce domain are presented.


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