Migrating to Cloud-Native Architectures Using Microservices: An Experience Report

Migration to the cloud has been a popular topic in industry and academia in recent years. Despite many benefits that the cloud presents, such as high availability and scalability, most of the on-premise application architectures are not ready to fully exploit the benefits of this environment, and adapting them to this environment is a non-trivial task. Microservices have appeared recently as novel architectural styles that are native to the cloud. These cloud-native architectures can facilitate migrating on-premise architectures to fully benefit from the cloud environments because non-functional attributes, like scalability, are inherent in this style. The existing approaches on cloud migration does not mostly consider cloud-native architectures as their first-class citizens. As a result, the final product may not meet its primary drivers for migration. In this paper, we intend to report our experience and lessons learned in an ongoing project on migrating a monolithic on-premise software architecture to microservices. We concluded that microservices is not a one-fit-all solution as it introduces new complexities to the system, and many factors, such as distribution complexities, should be considered before adopting this style. However, if adopted in a context that needs high flexibility in terms of scalability and availability, it can deliver its promised benefits

The Citizen, September 1964

https://egrove.olemiss.edu/citizens_news/1051/thumbnail.jp

The TeamPlay project : analysing and optimising time, energy, and security for cyber-physical systems

Funding: This work was supported by the EU Horizon-2020 project TeamPlay (https://www.teamplay-h2020.eu), grant #779882.Non-functional properties, such as energy, time, and security (ETS) are becoming increasingly important for the programming of Cyber-Physical Systems (CPS). This paper describes TeamPlay, a research project funded under the EU Horizon 2020 programme between January 2018 and June 2021.TeamPlay aimed to provide the system designer with a toolchain for developing embedded applications where ETS properties are first-class citizens, allowing the developer to reflect directly on energy, time and security properties at the source code level. In this paper we give an overview of the TeamPlay methodology, introduce the challenges and solutions of our approach and summarise the results achieved. Overall, applying our TeamPlay methodology led to an improvement of up to 18% performance and 52% energy usage over traditional approaches.Postprin

Multi-cultural visualization : how functional programming can enrich visualization (and vice versa)

The past two decades have seen visualization flourish as a research field in its own right, with advances on the computational challenges of faster algorithms, new techniques for datasets too large for in-core processing, and advances in understanding the perceptual and cognitive processes recruited by visualization systems, and through this, how to improve the representation of data. However, progress within visualization has sometimes proceeded in parallel with that in other branches of computer science, and there is a danger that when novel solutions ossify into `accepted practice' the field can easily overlook significant advances elsewhere in the community. In this paper we describe recent advances in the design and implementation of pure functional programming languages that, significantly, contain important insights into questions raised by the recent NIH/NSF report on Visualization Challenges. We argue and demonstrate that modern functional languages combine high-level mathematically-based specifications of visualization techniques, concise implementation of algorithms through fine-grained composition, support for writing correct programs through strong type checking, and a different kind of modularity inherent in the abstractive power of these languages. And to cap it off, we have initial evidence that in some cases functional implementations are faster than their imperative counterparts

A Semantic Web Annotation Tool for a Web-Based Audio Sequencer

Music and sound have a rich semantic structure which is so clear to the composer and the listener, but that remains mostly hidden to computing machinery. Nevertheless, in recent years, the introduction of software tools for music production have enabled new opportunities for migrating this knowledge from humans to machines. A new generation of these tools may exploit sound samples and semantic information coupling for the creation not only of a musical, but also of a "semantic" composition. In this paper we describe an ontology driven content annotation framework for a web-based audio editing tool. In a supervised approach, during the editing process, the graphical web interface allows the user to annotate any part of the composition with concepts from publicly available ontologies. As a test case, we developed a collaborative web-based audio sequencer that provides users with the functionality to remix the audio samples from the Freesound website and subsequently annotate them. The annotation tool can load any ontology and thus gives users the opportunity to augment the work with annotations on the structure of the composition, the musical materials, and the creator's reasoning and intentions. We believe this approach will provide several novel ways to make not only the final audio product, but also the creative process, first class citizens of the Semantic We

Language factories

Programming languages are the primary mechanism by which software is created, yet most of us have access to only a few, fixed, programming languages. Any problem we wish to express must be framed in terms of the concepts the programming language provides for us, be they suitable for the problem or not. Domain Specific Languages (DSLs) suggest an appealing escape route from this fate, but since there is no real technology or theory underpinning them, new DSLs are rare. In this paper we present the Language Factories vision, which aims to bring together the theory and practice necessary to realise DSLs in a systematic way. In so doing, we hope to lower the barrier for language creation significantly, ultimately allowing software creators to use the languages most suited to them and their needs

Language factories

Programming languages are the primary mechanism by which software is created, yet most of us have access to only a few, fixed, programming languages. Any problem we wish to express must be framed in terms of the concepts the programming language provides for us, be they suitable for the problem or not. Domain Specific Languages (DSLs) suggest an appealing escape route from this fate, but since there is no real technology or theory underpinning them, new DSLs are rare. In this paper we present the Language Factories vision, which aims to bring together the theory and practice necessary to realise DSLs in a systematic way. In so doing, we hope to lower the barrier for language creation significantly, ultimately allowing software creators to use the languages most suited to them and their needs

Members and Outsiders: An Examination of the Models of United States Citizenship as well as Questions Concerning European Union Citizenship

Be it in the United States or across the Atlantic, notions of citizenship conjure up thoughts of nationalism, membership, equality, price and patriotism. Though these notions suggest a sense of inclusion, the term citizenship also conjures up, for many, feelings of exclusion and subordination. This article will examine the fact that despite the virtuous rhetoric associated with the term, the status of citizen is often an elusive ideal, notwithstanding the attainment of such status. While the status is theoretically to include a litany of rights as well as a perception of belonging, for many in this society, citizenship means neither. Although many consider citizenship as deriving from a few sources and resulting in one form of membership, this article will demonstrate that in the United States there are differing forms of the status and each containing various levels of participation and inclusion.\u27 The various forms include the Fourteenth Amendment Citizens, the Other Fourteenth Amendment Citizens, and the Alien-Citizens. These various forms of the status demonstrate that becoming a United States citizen does not result in becoming an equal member of the body politic