Johnny Cardoso Marques

Studies on Cytology and Differentiation in Sciaridae IV. Nuclear and Cytoplasmatic Differentiation in Salivary Glands of Bradysia Elegans (Diptera, Sciaridae)

SUMMARYThe salivary glands of Bradysia elegans have five sharply differentiated regions, the cells of which have different cytoplasmic secretions. There is a concomitant differentiation of the nuclei and cytoplasms. The chromosomes do not have puffs during the larval period when the secretions are being produced, stored and eliminated. Large DNA and RNA puffs develop at the end of the larval period and during the prepupal stage. The absence of puffs in metabolically active cells and their late appearance are discussed. One of the regions has nuclei with largely unpaired homologous chromosomes, while the pairing is normal in all the other regions. This non-pairing of homologous segments of chromosomes in the cells of this particular regions is probably due to physiological causes rather than to genetic differences of the homologous chromosomes.

Using Model-Based Development as Software Low-Level Requirements to Achieve Airborne Software Certification

The term Model-Based Development (MBD) is typically used to describe software development approaches in which models of software systems are created and systematically transformed to concrete implementations. In this paper, due to the increase of MBD utilization, an overview of how models can be used to specify software low-level requirements is provided to achieve airborne software certification in aircraft projects. This paper provides the guidance materials and the need of future perspectives and expands the impacts software planning, development and verification.

Developing a CDS with Scrum in an interdisciplinary academic project

During the 2nd semester of 2013, at the Brazilian Aeronautics Institute of Technology (Instituto Tecnologico de Aeronautica - ITA), a successful Interdisciplinary Problem Based Learning (IPBL) experience took place. At that time, almost 70 undergraduate and graduate students from 4 different courses within just 17 academic weeks had the opportunity of conceptualizing, modeling, and developing an Avionics Real-Time Embedded System (ARTES) with Cockpit Display Systems (CDS) for a fictitious Unmanned Aircraft Vehicle (UAV). This intensive and collaborative academic project has used the Scrum agile method and its best practices, and the Safety-Critical Application Development Environment (SCADE) from Esterel Technologies. This experience was stored in a Google site and implemented as a Proof of Concept (PoC). It represents just one example of how to solve the old problem of teaching and learning complex real-time avionics embedded systems, by collaboratively using the Scrum agile method with SCADE, a state of the art integrated CASE tool environment. Its main results are reported in this paper.

An Integrated Academic System Prototype Using Accidents and Crises Management as PBL

This paper aims to describe the agile development of an integrated system for accidents and crises management. This academic project prototype was developed at the Brazilian Aeronautics Institute of Technology, on the second Semester of 2015. The project has involved 80 undergraduate and graduate students at the same time from four different electronic and computer engineering courses. The Scrum Framework was combined with Problem-Based Learning (PBL), to develop a prototype within just 17 academic weeks. The prototype was developed as a Proof of Concept (PoC) and applied within a natural disaster scenario management, involving the four segments of: Civil Defense, Health Care, Fire Department, and Police Department. At the end of the project, it was possible to deliver an integrated academic system project prototype, associating a Control Room with Web Applications connected through Cockpit Display Systems (CDSs). Students were able to work geographically dispersed, using free cloud-based tools, and the Safety Critical Application Development Environment (SCADE), from ®;ANSYS Esterel Technologies, combining multiple types of hardware like Raspberry Pi and Arduino, and different sets of open-source tools.

An interdisciplinary academic project for spatial critical embedded system agile development

This paper describes an academic project using Interdisciplinary Problem Based Learning (IPBL). Its main objective was to simulate the launching of a remote sensing microsatellite system based on the DO178C standard. The project was named the Brazilian Academic Microsatellite Launching Integrated System (Sistema Integrado de LANcamento de microSatelite Academico Brasileiro SI-LANSAB). On this project, students had to conceptualize, model, and develop a spatial realtime embedded system within 17 weeks, using the Scrum agile method and its best practices. The SI-LANSAB development project was divided into 5 groups or Scrum Teams (ST) to develop high cohesion and low coupling embedded system components. Each ST was assigned to integrate two different Cockpit Display Systems: the Launcher Cockpit Display - Control Station (LCD-CS) and the Satellite Cockpit Display - Control Station (SCD-CS). Both LCD-CS and SCD-CS were developed by using the SCADE Suite and Display, the Safety Critical Application Development Environment from ANSYS®, an Integrated Computer Aided Software Engineering Environment (ICASEE). The major contribution of this paper is the description of how to use Scrum method and SCADE system tools to develop a complex real-time spatial embedded system to accomplish an assigned mission.

CARD-RM: A Reference Model for Airborne Software

This paper summarizes the preliminary aspects of a doctoral research that has been conducted at the Brazilian Aeronautics Institute of Technology (ITA). This research has the objective of developing the CARD-RM, a Certifiable, Agile, Reusable, and Disciplined Reference Model for airborne software. It aims to define a generic model that can be instantiated in each airborne software project, integrating agile practices, in order to improve efficiency without interference in DO-178C compliance.