The Experts below are selected from a list of 28143 Experts worldwide ranked by ideXlab platform
Taibi Davide - One of the best experts on this subject based on the ideXlab platform.
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From Monolithic Systems to Microservices : An assessment framework
'Elsevier BV', 2021Co-Authors: Auer Florian, Lenarduzzi Valentina, Felderer Michael, Taibi DavideAbstract:Context: Re-architecting Monolithic Systems with Microservices-based architecture is a common trend. Various companies are migrating to Microservices for different reasons. However, making such an important decision like re-architecting an entire System must be based on real facts and not only on gut feelings. Objective: The goal of this work is to propose an evidence-based decision support framework for companies that need to migrate to Microservices, based on the analysis of a set of characteristics and metrics they should collect before re-architecting their Monolithic System. Method: We conducted a survey done in the form of interviews with professionals to derive the assessment framework based on Grounded Theory. Results: We identified a set consisting of information and metrics that companies can use to decide whether to migrate to Microservices or not. The proposed assessment framework, based on the aforementioned metrics, could be useful for companies if they need to migrate to Microservices and do not want to run the risk of failing to consider some important information. © 2021 The Author(s)open access
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From Monolithic Systems to Microservices: An Assessment Framework
2021Co-Authors: Taibi Davide, Lenarduzzi Valentina, Auer Florian, Felderer MichaelAbstract:Context. Re-architecting Monolithic Systems with Microservices-based architecture is a common trend. Various companies are migrating to Microservices for different reasons. However, making such an important decision like re-architecting an entire System must be based on real facts and not only on gut feelings. Objective. The goal of this work is to propose an evidence-based decision support framework for companies that need to migrate to Microservices, based on the analysis of a set of characteristics and metrics they should collect before re-architecting their Monolithic System. Method. We designed this study with a mixed-methods approach combining a Systematic Mapping Study with a survey done in the form of interviews with professionals to derive the assessment framework based on Grounded Theory. Results. We identified a set consisting of information and metrics that companies can use to decide whether to migrate to Microservices or not. The proposed assessment framework, based on the aforementioned metrics, could be useful for companies if they need to migrate to Microservices and do not want to run the risk of failing to consider some important information
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Does Migrate a Monolithic System to Microservices Decrease the Technical Debt?
'Elsevier BV', 2020Co-Authors: Lenarduzzi Valentina, Lomio Francesco, Saarimäki Nyyti, Taibi DavideAbstract:Background. The migration from Monolithic Systems to microservices involves deep refactoring of the Systems. Therefore, the migration usually has a big economic impact and companies tend to postpone several activities during this process, mainly to speed-up the migration itself, but also because of the need to release new features. Objective. We monitored the Technical Debt of a small and medium enterprise while migrating a legacy Monolithic System to an ecoSystem of microservices to analyze changes in the code technical debt before and after the migration to microservices. Method. We conducted a case study analyzing more than four years of the history of a big project (280K Lines of Code) where two teams extracted five business processes from the Monolithic System as microservices, by first analyzing the Technical Debt with SonarQube and then performing a qualitative study with the developers to understand the perceived quality of the System and the motivation for eventually postponed activities. Result. The development of microservices helps to reduce the Technical Debt in the long run. Despite an initial spike in the Technical Debt, due to the development of the new microservice, after a relatively short period, the Technical Debt tends to grow slower than in the Monolithic System
Timothy Kuhn - One of the best experts on this subject based on the ideXlab platform.
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a communicative theory of the firm developing an alternative perspective on intra organizational power and stakeholder relationships
Organization Studies, 2008Co-Authors: Timothy KuhnAbstract:Existing theories of the firm exhibit significant shortcomings when questions turn to intra-organizational power and extra-organizational relationships — two issues central to understanding firm operations. Here I advance an alternative view, founded on the Montreal School of organizational communication's conception of conversation—text relations, yet extending it in several ways. In developing a communicative theory of the firm, I highlight the functions of, and relations between, `concrete' and `figurative' texts, paying particular attention to their participation in the construction of an authoritative (yet never Monolithic) System for cooriented and distributed action. Using examples drawn from struggles over power, strategy, and organizational form at GM, I show that seeing the firm in textual terms presents a very different view of its operations. Doing so, portrays individuals and collectives as engaging in sophisticated games where firms marshal consent and attract capital through textually media...
Lenarduzzi Valentina - One of the best experts on this subject based on the ideXlab platform.
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From Monolithic Systems to Microservices : An assessment framework
'Elsevier BV', 2021Co-Authors: Auer Florian, Lenarduzzi Valentina, Felderer Michael, Taibi DavideAbstract:Context: Re-architecting Monolithic Systems with Microservices-based architecture is a common trend. Various companies are migrating to Microservices for different reasons. However, making such an important decision like re-architecting an entire System must be based on real facts and not only on gut feelings. Objective: The goal of this work is to propose an evidence-based decision support framework for companies that need to migrate to Microservices, based on the analysis of a set of characteristics and metrics they should collect before re-architecting their Monolithic System. Method: We conducted a survey done in the form of interviews with professionals to derive the assessment framework based on Grounded Theory. Results: We identified a set consisting of information and metrics that companies can use to decide whether to migrate to Microservices or not. The proposed assessment framework, based on the aforementioned metrics, could be useful for companies if they need to migrate to Microservices and do not want to run the risk of failing to consider some important information. © 2021 The Author(s)open access
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From Monolithic Systems to Microservices: An Assessment Framework
2021Co-Authors: Taibi Davide, Lenarduzzi Valentina, Auer Florian, Felderer MichaelAbstract:Context. Re-architecting Monolithic Systems with Microservices-based architecture is a common trend. Various companies are migrating to Microservices for different reasons. However, making such an important decision like re-architecting an entire System must be based on real facts and not only on gut feelings. Objective. The goal of this work is to propose an evidence-based decision support framework for companies that need to migrate to Microservices, based on the analysis of a set of characteristics and metrics they should collect before re-architecting their Monolithic System. Method. We designed this study with a mixed-methods approach combining a Systematic Mapping Study with a survey done in the form of interviews with professionals to derive the assessment framework based on Grounded Theory. Results. We identified a set consisting of information and metrics that companies can use to decide whether to migrate to Microservices or not. The proposed assessment framework, based on the aforementioned metrics, could be useful for companies if they need to migrate to Microservices and do not want to run the risk of failing to consider some important information
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Does Migrate a Monolithic System to Microservices Decrease the Technical Debt?
'Elsevier BV', 2020Co-Authors: Lenarduzzi Valentina, Lomio Francesco, Saarimäki Nyyti, Taibi DavideAbstract:Background. The migration from Monolithic Systems to microservices involves deep refactoring of the Systems. Therefore, the migration usually has a big economic impact and companies tend to postpone several activities during this process, mainly to speed-up the migration itself, but also because of the need to release new features. Objective. We monitored the Technical Debt of a small and medium enterprise while migrating a legacy Monolithic System to an ecoSystem of microservices to analyze changes in the code technical debt before and after the migration to microservices. Method. We conducted a case study analyzing more than four years of the history of a big project (280K Lines of Code) where two teams extracted five business processes from the Monolithic System as microservices, by first analyzing the Technical Debt with SonarQube and then performing a qualitative study with the developers to understand the perceived quality of the System and the motivation for eventually postponed activities. Result. The development of microservices helps to reduce the Technical Debt in the long run. Despite an initial spike in the Technical Debt, due to the development of the new microservice, after a relatively short period, the Technical Debt tends to grow slower than in the Monolithic System
Felderer Michael - One of the best experts on this subject based on the ideXlab platform.
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From Monolithic Systems to Microservices: An Assessment Framework
2021Co-Authors: Taibi Davide, Lenarduzzi Valentina, Auer Florian, Felderer MichaelAbstract:Context. Re-architecting Monolithic Systems with Microservices-based architecture is a common trend. Various companies are migrating to Microservices for different reasons. However, making such an important decision like re-architecting an entire System must be based on real facts and not only on gut feelings. Objective. The goal of this work is to propose an evidence-based decision support framework for companies that need to migrate to Microservices, based on the analysis of a set of characteristics and metrics they should collect before re-architecting their Monolithic System. Method. We designed this study with a mixed-methods approach combining a Systematic Mapping Study with a survey done in the form of interviews with professionals to derive the assessment framework based on Grounded Theory. Results. We identified a set consisting of information and metrics that companies can use to decide whether to migrate to Microservices or not. The proposed assessment framework, based on the aforementioned metrics, could be useful for companies if they need to migrate to Microservices and do not want to run the risk of failing to consider some important information
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From Monolithic Systems to Microservices : An assessment framework
'Elsevier BV', 2021Co-Authors: Auer Florian, Lenarduzzi Valentina, Felderer Michael, Taibi DavideAbstract:Context: Re-architecting Monolithic Systems with Microservices-based architecture is a common trend. Various companies are migrating to Microservices for different reasons. However, making such an important decision like re-architecting an entire System must be based on real facts and not only on gut feelings. Objective: The goal of this work is to propose an evidence-based decision support framework for companies that need to migrate to Microservices, based on the analysis of a set of characteristics and metrics they should collect before re-architecting their Monolithic System. Method: We conducted a survey done in the form of interviews with professionals to derive the assessment framework based on Grounded Theory. Results: We identified a set consisting of information and metrics that companies can use to decide whether to migrate to Microservices or not. The proposed assessment framework, based on the aforementioned metrics, could be useful for companies if they need to migrate to Microservices and do not want to run the risk of failing to consider some important information. © 2021 The Author(s)open access
Reza Fassihi - One of the best experts on this subject based on the ideXlab platform.
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a novel approach for constant rate delivery of highly soluble bioactives from a simple Monolithic System
Journal of Controlled Release, 2000Co-Authors: Viness Pillay, Reza FassihiAbstract:A novel Monolithic drug delivery System for highly water-soluble bioactive agents to follow pH-independent zero-order kinetics is described. The System utilizes a hydrophilic gel-based swellable polymeric material (polyethylene oxide), a model drug (metoprolol tartrate, 100% water soluble at 25 degrees C) and different electrolytes, such as sodium carbonate and/or pentasodium tripolyphosphate. Based on the induction of in situ intra-gel chemical reactions between different ionic species, drug and polymer, a heterogeneous structure manifested as 'peripheral boundary stiffening,' is accomplished. The consequence of these interactions essentially include the development of gradient-controlled matrix swelling as elucidated through textural profiling, which may contribute to inhibition of drug solubility and its outward diffusion. Analysis of textural profiles and photomicroscopy distinctly provides information on the disposition of peripheral boundary densification for the electrolyte-containing matrices. Electrolytic conductivity measurements performed with the simultaneous analysis of matrix swelling showed that sodium carbonate forms a highly reactive matrix within the first 3 h of medium penetration. On the other hand, larger molecules such as pentasodium tripolyphosphate maintain a constant conductivity level, which may be related to its lower solubility and diffusion in comparison to sodium carbonate. Based on model fitting and statistical analysis, it is shown that drug release kinetics were adequately described by M(t)/M(infinity)=k(0)t, with zero-order release rate constant k(0) of 0.054 h(-1). This novel approach in formulation development could potentially be used for constant rate delivery of highly soluble bioactive agents over an extended period for specific biopharmaceutical needs.
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electrolyte induced compositional heterogeneity a novel approach for rate controlled oral drug delivery
Journal of Pharmaceutical Sciences, 1999Co-Authors: Viness Pillay, Reza FassihiAbstract:In this work a new approach for in situ interactions between drug and electrolyte(s) is devised to control the release of highly water soluble drugs from oral hydrophilic Monolithic Systems. The model drug diltiazem hydrochloride (water solubility in excess of 50% at 25 °C), in conjunction with specific electrolytes, was principally employed in the design of swellable tablet formulations comprised of hydrophilic polymers such as hydroxypropylmethlcellulose (HPMC) or poly(ethylene oxide) (PEO). Electrolytes such as sodium bicarbonate or pentasodium tripolyphosphate were used to modulate intragel pH dynamics, swelling kinetics, and gel properties. Through in situ ionic interactions (an intragel matrix System composed of different chemical species that promote competition for water of hydration), a compo-sitionally heterogeneous structure referred to as a ‘metamorphic scaffold’ was established. It is shown that this latter structure results in the inhibition of drug dissolution, induction of a differential swelling rate, and attainment of ‘matrix stiffening’ and axially provides a uniform gel layer. Presence of such phases in matrix structure and its influence on swelling dynamics enabled control of diltiazem hydrochloride release in a zero-order manner in different pH environments over a 24-h period. From kinetic analysis using the power law expressions [Mt/M∞ = k1tn, Mt/M∞ = k1tn ± k2t2n] and Hopfenberg model [Mt/M∞ = 1 − (1 − k1t)n], it became apparent that the dynamics of matrix relaxation and controlled erosion were major factors involved in the release mechanism, while the composite rate constant k1 (in Hopfenberg model) decreased by approximately 2-fold in the presence of electrolyte(s). These findings indicated that the dynamics of swelling and gel formation in the presence of ionizable species within hydrophilic matrices provide an attractive alternative for zero-order drug delivery from a simple Monolithic System.
