Arhivă — Seria C

1

AUTOMATIC HIP PROSTHESIS FIT ESTIMATION BY COOPERATIVE X-RAY IMAGE SEGMENTATION

Laura FLOREA, Constantin VERTAN

Total hip replacement is a common procedure in today orthopedics, with high rate of long term success. Failure prevention is based on a regular follow-up aimed at checking the prosthesis fit and state by means of visual inspection of radiographic images. This paper describes two methods for automatic analysis of the ra…

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2

LOCALITY AND SYMMETRY IN INTERCONNECTING

Cristian LUPU, Tudor NICULIU

Locality is the behavior (structural self-organization) of a collectivity around an origin. Group locality is a behavior of a collectivity determined of certain group properties, e.g., symmetries of finite plane figures. Group locality is another point of view on the networks locality. Expressing the interconnection as…

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3

THE ANALYSIS OF CAN AND ETHERNET IN DISTRIBUTED REAL-TIME SYSTEMS

Siegfried COJOCARU, Constantin RÃDOI, ªtefan STÃNCESCU

Process scheduling in dedicated distributed system designs involves local node processor scheduling, communication controller programming and transmission scheduling. A systematic approach is to decouple node design from communication scheduling in a way that algorithms used to implement the solution can be changed ind…

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4

OPTIMIZATION OF SCHEDULIG PROCESS IN GRID ENVIRONMENTS

Florin POP, Valentin CRISTEA

This article presents of the optimization of Grid scheduling problem. The scheduling models of Grid scheduling algorithms are presented. The paper also proposes a taxonomy of scheduling algorithms, based on functional levels, which offers a reference for designing a complete solution for Grid scheduling. The analyses o…

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5

VOLTAGE SAG MITIGATION USING A NEW DIRECT CONTROL IN D-STATCOM FOR DISTRIBUTION SYSTEMS

Rahmat-Allah HOOSHMAND, Mahdi BANEJAD, Mostafa AZIMI

With the growth of need of electrical energy in the technological societies, the demand for receiving the high quality electrical energy is being increased. Among the different disturbances affecting the power quality, the voltage sag and temporary voltage are essential issues especially that need to be fully investiga…

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6

SYMBOLIC COMPUTATION TUNING METHOD FOR THE EVALUATION OF ALGORITHMS IN SMALL SIGNAL PARAMETERS EXTRACTION

Cristian ZORIO, Mircea BODEA, Ioan RUSU

The math problem associated to the problem of parameter extraction of a circuit can be reduced to the problem of finding the global minimum of an error function obtained with the least squares method. In the case of the small signal analysis of a circuit (when a linear model is considered), the circuit’s associated fun…

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7

EFFICIENT GAUSSIAN ELIMINATION ON A 2D SIMD ARRAY OF PROCESSORS WITHOUT COLUMN BROADCASTS

Mugurel Ionuþ ANDREICA

This paper presents an efficient method for implementing the Gaussian elimination technique for an n•m (m≥n) matrix, using a 2D SIMD array of n•m processors. The described algorithm consists of 2•n-1=O(n) iterations, which provides an optimal speed-up over the serial version. A particularity of the algorithm is that it…

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8

DNA COMPUTING – MODELLING AND SIMULATING A MOLECULAR TURING MACHINE

Mihnea MURARU, Matei-Dan POPOVICI

Using “DNA Computing”, a form of computation detailed further in the article, we design a model for a molecular computer – a Molecular Turing Machine. We explain the applicable molecular operations and their extensibility on the model. Finally we develop a Simulator aimed at studying the behavior of the Molecular Turin…

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9

MODEL FOR A GRID INFRASTRUCTURE BASED ON JAVA

Radu Adrian NICULIÞÃ, Nicolae ÞÃPUª

This paper presents a model for a GRID infrastructure based on the advantages of using Java in the field of GRID computing. The model is the foundation of the development and implementation of a middleware which can create a GRID system based on a hybrid paradigm. The model is build starting from three tier architectur…

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10

DESIGN AND FABRICATION OF THE MICROCHANNELS FOR MICROFLUIDICS APPLICATIONS

Monica NÃDêAN, Adrian MANEA

In this work a new method relying on the lithographic techniques is presented for the fabrication of the microchannels. The originality aspects of the work come from the unique design of the microchannels able to handle a large range of the microfluidics applications, such as the alignment of the colloidal semiconducto…

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11

DESIGN AND FABRICATION WITH ELECTRON BEAM LITHOGRAPHY OF A DIFFRACTIVE OPTICAL ELEMENT

Mihai KUSKO, Adrian DINESCU, Dana CRISTEA, Dan APOSTOL, Paul ªCHIOPU

In this work the first results obtained at national level regarding the design and fabrication with electron beam lithography of a diffractive optical element are presented. This diffractive optical element has two levels and it works in reflection. The purpose of the diffractive optical element is the reproduction of …

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12

EVALUATION OF THE RELAP5/SCDAP ACCIDENT ANALYSIS CODE APPLICABILITY TO CANDU NUCLEAR REACTORS

Mirea MLADIN, Daniel DUPLEAC, Ilie PRISECARU

SCDAP/RELAP5 code has been developed in US for best-estimate simulation of light water reactors transients during nuclear accidents. It is the result of the coupling between RELAP5, modelling thermalhydraulic, and SCDAP, modelling the behavior of the reactor core during severe accidents. RELAP5 applications to CANDU wi…

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13

SINGLE ELECTRO-PNEUMATIC CELL SENSOR FOR THE DETECTION OF PRESSURE ULCERS

Cristina-Luminiþa TUINEA-BOBE, Patrick LEMOINE, Claudine GHEIN, Adrian RUSU

In the last ten years, the problem of pressure ulcer become very important, not just for the medical field also for the engineering field, which start to be involve in the necessity to early detect the development of this kind of injuries. An improved INSA Lyon electro-pneumatic sensor cell is presented in this paper. …

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14

ECHO CANCELLATION USING THE LMS ALGORITHM

Cristina Gabriela SÃRÃCIN, Marin SÃRÃCIN, Mihai DASCÃLU, Ana-Maria LEPAR

A major problem in voice communication over the Internet (voice messenger, VoIP) is represented by the created echo, due to the microphones used and the very high latency of the transmission. The goal of this paperwork is to present the LMS algorithm (an adaptive algorithm). The simulations of the cancellation of noise…

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15

MODELING OF THE INDUCTION MOTOR VENTILATION BY ELECTRIC CIRCUITS

Nicolae VOICU, Lucia DUMITRIU, Mihai IORDACHE, Dragoº NICULAE

The paper presents a new method to analyze the cooling medium flow in electrical machines. The method is based on the analogy between the equivalent air-dynamic scheme and a nonlinear resistive electrical circuit by which the ventilation system can be modeled. To perform the analysis, the modified nodal method is used.

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16

INFLUENCE OF THE HALOGEN-FREE ADDITIVES CONCENTRATION ON FIREPROOFED COMPOSITE MATERIALS PROPERTIES

Aurelia IONESCU, Petru V. NOÞINGHER, Laszlo TARKO, Sanda COTESCU, Lidia AVÃDANEI, Cornel PREDUÞ

The achievement of the composite materials fireproofed by using halogen-free additives is the one of the important requirements in the applications in many domains. In this paper, we present a part of the results acquired by the autors redarding the obtaining of the fireproofed polypropylene and polyamide based composi…

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17

BIO-DRYING OF ROMANIAN MUNICIPAL SOLID WASTE: AN ANALYSIS OF ITS VIABILITY

Ramona Mihaela NEGOI, Marco RAGAZZI, Tiberiu APOSTOL, Elena Cristina RADA, Cosmin MÃRCULESCU

Romania as a European Union member country must comply with the EU directive and regulation regarding collection, transport and storage of municipal solid waste. This paper presents an option to pre-treat municipal solid waste before energy recovery through thermal or thermo-chemical processes, followed by a disposal i…

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18

GENETIC ALGORITHMS PERFORMANCES ASSESSMENT FOR OPTIMAL LOCATION AND SIZING OF DISTRIBUTED GENERATION

Ioana PISICÃ, Petru POSTOLACHE

The paper addresses the problem of optimal allocation of distributed generation sources in an electrical distribution network. The proposed solution method is based on genetic algorithms and the study is centered on the influence of genetic algorithms’ parameters upon their performances. The results show that different…

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19

AN AD-HOC DATA NETWORK FOR MEDICAL DATA COLLECTION AND REDUCTION

Mihai CHEÞAN, Alexandru M. MOREGA

This paper presents an ad-hoc network that provides for fast and accurate telemetric channeling of data from medical monitoring devices in an outpatient environment. The network is used to analyze the concept of sedentary state that helps providing a model of sedentary state by the pharmaceutical employees. Prevention …

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20

EXPERIMENTAL STUDY ON THE LARGE POWER TRANSFORMER UNIT TEMPERATURE VARIATION

Traian CHIULAN, Brânduºa PANTELIMON

The monitoring systems of the transformer units are developed according to their loading guides, as their manufacturers specify. The problem that arises is due to the fact that the thermal models of the diverse versions of the loading guides do not yield similar results. Therefore, different values may be obtained for …

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