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Lidia Dobrescu

Publications and source records attributed to Lidia Dobrescu.

5 recordsLinked to original sources
arXiv2015

Radiation Dose Risk and Diagnostic Benefit in Imaging Investigations

The paper presents many facets of medical imaging investigations radiological risks. The total volume of prescribed medical investigations proves a serious lack in monitoring and tracking of the cumulative radiation doses in many health services. Modern radiological investigations equipment is continuously reducing the total dose of radiation due to improved technologies, so a decrease in per caput dose can be noticed, but the increasing number of investigations has determined a net increase of the annual collective dose. High doses of radiation are cumulated from Computed Tomography investigations. An integrated system for radiation safety of the patients investigated by radiological imaging methods, based on smart cards and Public Key Infrastructure allow radiation absorbed dose data storage.

physics.med-ph↗
arXiv2014

Multiprocessor System Dedicated to Multi-Rotor Mini-UAV Capable of 3D flying

The paper describes an electronic multiprocessor system that assures functionality of a miniature UAV capable of 3D flying. The apparatus consists of six independently controlled brushless DC motors, each having a propeller attached to it. Since the brushless motor requires complex algorithms in order to achieve maximum torque, efficiency and response time a DSP must be used. All the motors are then controlled by a main microprocessor which is capable of reading sensors (Inertial Measurement Unit (IMU)-orientation and GPS), receiving input commands (remote controller or trajectory plan) and sending independent commands to each of the six motors. The apparatus contains a total of eight microcontrollers: the main unit, the IMU mathematical processor and one microcontroller for each of the six brushless DC motors. Applications for such an apparatus could include not only military, but also search-and-rescue, geodetics, aerial photography and aerial assistance.

cs.CE↗
arXiv2014

Replacing ANSI C with other modern programming languages

Replacing ANSI C language with other modern programming languages such as Python or Java may be an actual debate topic in technical universities. Researchers whose primary interests are not in programming area seem to prefer modern and higher level languages. Keeping standard language ANSI C as a primary tool for engineers and for microcontrollers programming, robotics and data acquisition courses is another strong different opinion trend. Function oriented versus object oriented languages may be another highlighted topic in actual debates.

cs.CY↗
arXiv2014

Domotic Embedded System

This paper presents an original domotic embedded system for room temperature monitoring. The OpenRemote is the main software interface between the user and the system, but other software components and communication protocols are used, such as 1-Wire protocol for temperature monitoring devices, RS-232 for the central PC unit and OWFS software for remote control using Android mobile devices. The system architecture consists in hardware and software components to remote control a room temperature parameter for energy efficiency increasing.

cs.OH↗