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Analiza numeryczna opływu płatowca samolotu Diamond DA20-C1

100%

Czapla R. , Rybiński K.

tom R. 22, nr 12

336--341, CD

W artykule przedstawiono analizę numeryczną opływu aerodynamicznego modelu CAD 3D płatowca samolotu DIAMOND DA20-C1 wykorzystywanego w Wyższej Szkole Oficerskiej Sił Powietrznych w Dęblinie w szkoleniu selekcyjnym studentów w specjalności pilotaż. W środowisku CAE SolidWorks Flow Simulation v.2015. przeprowadzono symulacje opływu w różnych warunkach lotu i uzyskano wyniki w postaci rozkładu ciśnień na płatowcu oraz charakterystyk sił aerodynamicznych w funkcji kąta natarcia.

The article presents numerical analysis of the aerodynamic flow around a 3D CAD model airframe Diamond DA20-C1 used in the Air Force Academy in Dęblin in training students in the speciality selection pilotage. Using SolidWorks Flow Simulation v.2015 CAE software flow simulations were done in various flight conditions and obtained results in terms of the pressure distribution on the airframe and the aerodynamic characteristics.

Measuring the impact of academic policy innovation

80%

Akynova A. , Jumasheva S. , Rybiński K.

2018

tom z. 119

7--29

This paper presents application of Data science models to the quality assurance processes at the university. In 2015 Narxoz University in Almaty, Kazakhstan introduced a major change to its academic policy. Final year bachelor students were required to complete team-based diploma projects, focused on solving real business problems, instead of writing standard, often purely descriptive and theoretical diploma theses. This article uses data science models (linear regression, logit and CART) to analyze the effects of this policy change on recent graduates’ employability and wage levels using results of telephone survey conducted among 1956 graduates in 2015 and 2016. Estimated models show that students who have firm plans to find jobs, acquire valuable competences when preparing bachelor diploma and actively participate in student life, have higher probability of employment and earn higher wages. It means that the process of writing bachelor diploma should be carefully designed and monitored and that student learning outcomes also depend on their extra-curricular activity. Such analysis provides deep and interesting insights into the learning and assessment processes and should be a part of annual quality assurance review in every university. For example, results indicate that grading practices at Narxoz require a major review, as graduates with higher GPA did not exhibit higher employability nor higher wages. Similarly, curricula of some specializations (majors) should be reviewed due to low employment rate of graduates. Appropriate changes have already been implemented at Narxoz in 2017. Finally, we found that economic shocks have much stronger short-term impact on recent graduates’ employability and wages than reforms of academic curricula.

Extracting Use Case Scenarios and Domain Models from Legacy Software

70%

Smiałek M. , Rybiński K. , Jarzębowski N. , Nowakowski W. , Blatkiewicz S.

Computational Methods in Science and Technology

2014

tom Vol. 20, No. 4

139--150

Developing a new software system based on legacy software is a labor-intensive process. The main problem lies in preserving the application and domain (business) logic. This paper presents an approach to automate the process of extracting this logic, together with accompanying domain definitions. The approach is based on recording and processing the legacy system behaviour, observable through its user interface. The recovered application logic is represented with use case scenarios having precise sentences describing user-system interactions. These scenarios are tightly linked with domain models which are also created. The presented approach is supported by a tool chain. The central idea is to use a standard test automation system to capture test scripts. These scripts are then processed by a dedicated translation tool and translated into constrained natural language models. These models are machine processable, which allows for further automatic transformations even down to code. The paper presents the results of a case study where the approach and tools were used to migrate an old desktop system to a modern web technology application.