Volume 5, No. 1 (2015)

Articles

INK-JET PRINTED MESOPOROUS SILICA MICRODOTS ON OPTICAL FIBER : TOWARDS ENDOSCOPIC DEVICES FOR EARLY DETECTION AND THERAPY OF CANCER
ACHRAF NOUREDDINE(1), JULIEN GRAFFION(1), ROMAIN TRIHAN(1), OLIVIA DE LOS COBOS(1), MARTINE LEJEUNE, FABRICE ROSSIGNOL(1), CLAIRE LEFORT(2), LUDOVIC MICALLEF(3), HUSSEIN AKIL(2), FABRICE LALLOUÉ(3), JÉRÔME DESROCHES(4), OLIVIER BAUDET(4), MARION PONCELET(5)

In the present work, the objective is to develop a biosensor on the tip of optical fiber-based endoscopic device capable to detect the presence of tumors at an early stage. The innovative approach is to use the flexibility and the resolution of the inkjet printing process combined to Evaporation-Induced Self-Assembly (EISA) to achieve appropriate mesoporous silica microdots arrays functionalized by click chemistry for detection of cancers. As for this specific application, bio-receptors labeled with fluorophores are anchored to the surface of the mesoporous silica. Thus, Fluorescence Resonance Energy Transfer (FRET) is induced when bio-receptors interact with the tumor cells’ biomarker of interest. The preliminary results are obtained on glass substrates. Currently, the work is ongoing to transpose the concept on optical fibers and to be ready for non-invasive clinical tests.

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THE OPTIMIZATION OF THE GEOMETRIC PARAMETRES OF THE FIVE-BAR MANIPULATOR ACCORDING TO THE GIVEN WORKSPACE USING THE METHOD OF THE GENETIC ALGORITHM
ANDRIOAIA DRAGOS(1), CULEA GEORGE(1), ROTAR DAN(1)

In the last years, the manipulators with parallel topology have begun to be more and more used because of their unexploited potential. The usage of the manipulators with parallel topology instead of the manipulators with serial topology presents a series of advantages. A disadvantage of the usage of the manipulators with parallel topology would be the dimension of the workspace which is limited. Within this paper, the authors optimize the geometric parameters of the five-bar manipulator according to the given workspace by using the method of the genetic algorithms. The method helps the designer to dimension the geometrical parameters according to the workspace which is demanded.

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MATERIALS CHARACTERIZATION USING KLYSTRON CAVITY: EXTRACTION OF THICKNESS AND DIELECTRIC PARAMETERS OF THIN LAYER
ANOUMOU APEDJINOU(1), DOMINIQUE CROS(1), VALERIE MADRANGEAS(1), DAMIEN PASSERIEUX(1), MICHEL AUBOURG(1), JEAN MICHEL LEFLOCH(2), MICHAEL EDMUND TOBAR(2)

In Microwave field, the utilization of klystron cavity also called re-entrant cavity is interesting because of its small dimensions compared to wavelengths. The main aim of this article is to explain the working of the cavity with original coupling system using coaxial probes and its frequency response similar to piezoelectric resonators. That led us to build an equivalent circuit based on lumped elements

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JOINT MODELS OF ASSOCIATION BETWEEN COMMUNITY-AVERAGE POLLUTANT CONCENTRATIONS AND LUNG-FUNCTION I. GROWTH IN LUNG FUNCTION ASSOCIATED WITH LOCAL TRAFFIC EXPOSURE: BACĂU COHORT STUDY
CULEA CĂTĂLINA MIHAELA(1), CULEA GEORGE(1)

The adverse health effects of air pollution are of increasing concern. Many studies show that air pollution causes not only unfavourable respiratory effects in patients with asthma, chronic obstructive pulmonary disease, and other lung conditions, but also cardiovascular effects such as myocardial infarction and stroke. This paper presents the evaluation of association between residential exposure to traffic and lung-function. Our results were robust to adjustment for several factors, including indoor sources of air pollution and socioeconomic status. In conclusion, the possibility of confounding by other factors still exists and further investigations are needed to corroborate our results.

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JOINT MODELS OF ASSOCIATION BETWEEN COMMUNITY-AVERAGE POLLUTANT CONCENTRATIONS AND LUNG-FUNCTION II. EFFETS PROINFLAMMATOIRES DES PARTICULES FINES
CULEA CĂTĂLINA MIHAELA(1), CULEA GEORGE(1)

These studies continue to evaluate the prevalence of allergies and the severity of asthma and to identify the risk factors associated with the proximity of traffic in Bacău’s region. Our results sustained a very recent hypothesis that changes in allergies prevalence observed last decade might be related to the interactions between allergens and traffic-related pollution. It was employed an semi-individual design to report individual data on allergy and asthma - 318 school children (10,4 0,5 years), attending 8 randomly chosen schools in Bacău region - the concentrations of NO2 and PM2,5 assessed in proximity of their homes. The protocol includes medical tests for skin examination like skin prick test (SPT) to common allergens, test for flexural dermatitis, exercise-induced bronchial (EIB) reactivity and a standardised health questionnaire. Further longitudinal investigations are needed to corroborate our findings.

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SRP – TOOLS FOR EDITIND AND SIMULATING PETRI NETS
CULEA GEORGE(1), ANDRIOAIA DRAGOȘ(1), CULEA CĂTĂLINA MIHAELA(1)

This paper describes SRP - a tool that allows editing, simulation and analysis of Petri Networks. SRP has been developed at the „VasileAlecsandri” University of Bacau. The graphical interface is very user-friendly and allows a very easy way to draw a Petri Network, modification, saving and its simulation. The application was made on Visual C ++ and can run on Windows operating system including 8.1 on 32 and 64 bit. Petri nets analysis performed by SRP software is based on the latest research in the field. The facilities offered by this application are illustrated by an example.

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DEVELOPPEMENT OF CERAMICS SILICATES BASED CLAYS OF SENEGAL: PHYSICOCHEMICAL CAHARACTERISTICS AND CONSOLIDATION
MARTHE TATIANA DIATTA(1,2), GISELE LAURE LECOMTE-NANA(2) , DIOUMA KOBOR(1) OUMAR SOCK(1), PHILIPPE BLANCHART(2), DOROTHEE AZILINON(3)

This study is devoted to explore the possibility of using two clays in the south of Senegal in the local industry. The chemical and mineralogical compositions, their density and specific areas are used to classify them as kaolino-illite clays or kaolini-smectite. Thes structural phases are detected during tehrmal analyzes. The mechanical properties remain low and the addition of an organic biopolymer increases the flexural strength from 28 % to 1000°C even if it does not reach the standard bricks and tiles. Prospects are the addition of fluxes potassic and sodic to accebtuate the densification and to lower the temperature of cooking.

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THE IMPACT OF INTERNET OF THINGS IN CLOUD COMPUTING: PRESENT AND PERSPECTIVES
FURDU IULIAN(1), VÂRLAN SIMONA ELENA(1)

This paper aims to presents how the potential of Internet of Things will change the future of Cloud. The next generation of cloud technologies will be strongly influenced when standardization and communication platforms will become an Internet of Things reality. An example is provided to describe how an Internet of Things device could became operational on the web. Actual and emerging techniques for Internet of Things implementation are discussed and related open issues concerning to the relation between Internet of Things applications and Cloud are investigated and potential solutions are explored.

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RESEARCH ABOUT THE INFLUENCE OF INTERNAL HEAT GAINS ON ENERGY PERFORMANCE EVALUATION OF INDUSTRIAL BUILDINGS
GRIGORE ROXANA(1), DIMA CAMELIA

This paper attempts to demonstrate how the internal heat gains influence the energy performance of industrial buildings. In order to achieve this, the paper considers a concrete case of a production hall. The energy performance of this buiding is calculated by taken into account three variants: the first one – a reference variant, the second one- a version that does not account for heat gains related to the production process and the third one - normal operating conditions. The calculation methodology is the one related to Romanian regulations in force, using the simplifying assumptions of these regulations.

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UNDERSTANDING OF OXYGEN TRANSPORT MECHANISMS THROUGH DENSE PEROVSKITE CERAMIC MEMBRANES
GUIRONNET LAURE(1,3), GEFFROY PIERRE-MARIE(1), RICHET NICOLAS(2), CHARTIER THIERRY(1)

For last decades, important research activities have led to the improvement of electrochemical devices for energy production. Our last researches lead us to the development of a specific experimental setup which allows the determination of the oxygen activity of the membrane surfaces and in gas. These measurements of oxygen activities at the membranes surfaces give us essential data for the better understanding of the membrane surface oxygen exchange mechanisms corresponding to the determining rate step of oxygen transport through the dense ceramic membranes.

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ON MODELING THE LONG TRANSMISSION LINES THROUGH EQUIVALENT Π CIRCUITS
GHEORGHE HAZI(1), ANETA HAZI(1), SORIN VERNICA(1)

In this paper the authors present the results obtained in modeling a long transmission line through a sequence of equivalent π circuits. An equivalent ππ circuit is model with transverse elements capacities. Are shown the results obtained for idle regime and for various load regimes. Are compared the results obtained with those theoretical given by the long lines equations. Conclusions are drawn about the usefulness of the model used in the laboratory.

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DESIGN AND CHARACTERIZATION OF MICROSYSTEMS FOR CELL ANALYSIS BY DIELECTROPHORESIS
HJEIJ FATIMA(1), DALMAY CLAIRE(1), LALLOUÉ FABRICE(2), BESSAUDOU ANNIE(1), BLONDY PIERRE(1), POTHIER ARNAUD(1)

This paper presents the design and characterization of microsystems for the analysis of biological cells using dielectrophoresis techniques in a microfluidic environment. Dielectrophoresis is an electrokinetic technique used to manipulate cells which are electrically polarized when they are subjected to a non-uniform electric field. As the movement of cells is related to their dielectric properties, the study of cell dielectrophoretic behaviour appears as an attractive method for their characterization. In this paper, microsystems dedicated to the study of cell dielectrophoretic behaviour are studied. At first, devices have been investigated using polystyrene beads. In a second step, the behaviour of cancerous colorectal cells (SW-620 cell line) will be analysed and first results obtained in the 10 kHz to 10 MHz frequency range will be presented.

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DISPERSION OF PHYLLOSILICATES AND SINTERING OF SILICATED CERAMICS : FORMULATION – SHAPING PROCESS – PROPERTIES
HOUTA NADIA(1), LECOMTE-NANA GISELE-LAURE(1,2), TESSIER-DOYEN NICOLAS(1,3), PEYRATOUT CLAIRE(1,2)

This study aims at i) studying the rhelogical behavior of suspensions based on kaolin and halloysite, ii) shaping textured ceramics by tape-casting and (iii) determining stress to rupture values after different thermal treatments. Main results revealed that 0.2 mass% is the suitable amount for the best dispersion. Moreover, halloysite nanotubes increase significantly mechanical properties after 1200°C.

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ELECTRIC DRIVE SYSTEM EQUIPPED WITH STATIC FREQUENCY CONVERTER CONTROLLED WITH COMPACTRIO 9074
LIVINTI PETRU(1)

In this article, we presented an electric drive system with the static frequency converter controlled data acquisition and control board CompactRIO 9074 produced by National Instruments USA. To adjust the real-time speed three-phase asynchronous motor with squirrel-cage was developed an experimental stand in the laboratory of electrical machines. To implement the speed control algorithm of the three-phase asynchronous motor was developed a program in the programming environment LabVIEW 2013.

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SYNCHRONOUS INJECTION OF CERAMIC SUSPENSIONS IN PULSED ARC PLASMA
FABRICE MAVIER(1), VINCENT RAT(1), MARTINE LEJEUNE(1), JEAN-FRANCOIS COUDERT(1), MARGUERITE BIENIA(1), CHRISTOPHE CHAZELAS(1)

Direct current arc plasma torches are used in thermal spraying techniques. Research has led to the development of nanostructured coatings by suspension plasma spraying (SPS). However, plasma instabilities lead to heterogeneity and lack of reproducibility of deposits. Efforts to understand the origins of these instabilities have been made and a new approach is proposed here. A method for homogeneously treat the droplets injected into the plasma was developed. Finely structured homogeneous deposits are obtained.

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SYNTHESE DES MATERIAUX CERAMIQUES A BASE DE TITANATE D’ALUMINIUM ET DE MULLITE EN PRESENCE DE FELDSPATH
MELINESCU ALINA(1*), EFTIMIE MIHAI(1), DUMITRESCU OVIDIU(1), ANTON CORNEL(2)

This research work consisted to synthesize materials based on aluminum titanate and mullite by conventional sintering in air between 1300 and 1500 ° C. The three compositions tested consist of the following starting raw materials: corundum, rutile, kaolin and feldspar. Mullite is the first compound formed, but appeared to 13500C titanate. A 15000C, XRD diagrams testified to the existence of balance-only (titanate and mullite). The apparent density measured on the samples thermally treated 15000C showed values between 69 and 74% of the theoretical density.

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PACKAGING OPTIMIZATION OF AND ELECTO-OPTICAL MODULATOR FOR HIGH DATA-RATE COMMUNICATIONS
SAMUEL NGOHO(1), KAMEL FRIGUI(1), STÉPHANE BILA(1), BOUCHRA FRIGUI(2), DELPHINE MARRIS-MORINI(3), LAURENT VIVIEN(3), ALEXANDRE MOTTET(4), JÉRÔME HAUDEN(4), STÉPHANE BERNABE(5), BENJAMIN BLAMPLEY(5), GABRIEL CHARLET(6)

This paper presents a measured electro-otpical silicon modulator based on carrier depletion in a PN junction and electromagnetics simulations for optimizing its behavior. It also reports on the packaging of the modulator, specifically, both the input and output circuits which allow connecting in one hand the driver and then the load for RF matching.

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ASSESSMENT OF MICROWAVE TREATMENT EFFECTS ON SANITATION AND BIOGAS POTENTIAL OF SLUDGES
PROROT AUDREY(1*), ANDREEA SOPCA(2), ARNAUD CORMOS DELIA(3), LEVEQUE PHILIPPE(3), LEPRAT PATRICK(1)

The aim of this study is to assess the effectiveness of sludge pre-treatment by mean of microwave technology to improve biogas production and sanitize the treated sludge. For this purpose, the sludge was treated by microwave at different temperatures (65°, 80° and 95° C) and for different times (10 and 20 minutes), always in comparison with a conventional heat treatment (water bath). Whereas microbiological analysis showed that bacteria seem more sensitive to microwave treatment as conventional heating, the organic matter solubilization and the biogas potential of sludge seem more important after a conventional heat treatment.

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AUTOMATION WIRELESS REMOTE CONTROL
ROTAR DAN(1)

The paper presents the realization of an automation solution with wireless remote control. Often to achieve automation systems it appeals to the distributed automation systems. This solution is typically used when there is a central control point with a high computing power and more remote distributed points with simple computer systems. The connection of the distributed points with the central control point can be achieved by using the specialized process bus or by the radio. Wireless connections are especially useful when the commanded items are mobile. Modern robotic environments are equipped with mobile robots moving in a certain area to perform various tasks. For example, a robotic domestic environment can have a smart refrigerator, a smart washing machine etc. but also a mobile elements such as an intelligent vacuum cleaner, an intelligent domestic robot etc. These elements require one or more data networks for exchange of information and commands.

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EMBEDDED SYSTEM WITH SOFT PROCESSOR FOR THE DRIVE SYSTEM OF AUTONOMOUS ROBOTS
ROTAR DAN(1)

This paper presents a solution to improve mobile robot drives. This type of robots currently found in the smart environments is characterized by its own power source. It is therefore necessary that all elements of the system consume the electricity judiciously. The solution presented is based on an embedded system with a programmable processor designed to be configured with a field-programmable gate array (FPGA). Such a structure is highly flexible and allows the possibility to obtain greater performances including significantly reducing energy consumption.

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ELECTROCONVECTIVE HEAT EXCHANGE IN GAS-LIQUID EMULSIONS
SAJIN TUDOR(1)

The complex experimental investigations were carried out with the aim of revealing of the physical mechanisms of electric field influence on heat transfer processes in gas–liquid emulsions. Concrete the heat removal and interphase heat transfer in gas-liquid emulsions are considered.

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ELECTROCONVECTION IN GAS-LIQUID MEDIA
SAJIN TUDOR(1)

The electroconvective gas bubble movement in the field of plane-parallel capacitor is investigated both experimentally and theoretically. The evolution of a bubble on the stages of growth, separation and surfacing is considered.

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MANUFACTURING CONDITIONS OF A MODIFIED TEM CELL FOR REAL-TIME OBSERVATION OF BIOLOGICAL CELLS EXPOSED TO ELECTROMAGNETIC FIELDS
SOUEID MALAK(1*), CARR LYNN(1,2), O’CONNOR RODNEY P. (1,2), LEVEQUE PHILIPPE(1), ARNAUD-CORMOS DELIA(1)

In this paper, we study the influence of the manufacturing conditions of a transverse electromagnetic (TEM) cell for real-time observation of biological cells during their exposure to electromagnetic fields. Microscopic observation is acheived through an aperture in the lower wall of the TEM cell that is sealed with a 700-nm film of the transparent conducting material Indium tin oxide (ITO). The ITO layer is connected to the lower wall with a conductive epoxy adhesive. To ensure a perfect and stable electrical contact, the epoxy must be heated to degas and consolidate. A study on the efficiency of contact provided by the epoxy was carried out according to the heating duration. The results show that a long heating duration more than 12 hours is required to obtain an electrical continuity in the aperture that is insensitive to temperature increase during exposure to electromagnetic fields.

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NEW ASPECTS REGARDING MOBILES DEVICES PROGRAMMATION
TOMOZEI COSMIN(1)

The objective of this paper is to briefly describe some novel aspects regarding the development of cross-platform mobile mapping applications. Practical examples are to be discussed about and new technologies are brought into light. Testing these applications plays a decisive role in obtaining high quality software.

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USING INTERNET OF THINGS TO IMPROVE PATIENT AWARENESS IN DRUG ADMINISTRATION
VÂRLAN SIMONA ELENA(1) , FURDU IULIAN MARIUS(1)

This paper presents a method to increase patients awareness and to improve the safety of medication use using Internet of Things. An experiment was undertaken by creating QR codes associated to patient information leaflets for different drugs. Patients were instructed to use smart-phones to read this QR codes as a memory aid or in case of patient information leaflet loss. Also, patients were questioned to evaluate their confidence in such method of information, and to estimate if this method can have educational potential.

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EXPERIMENTAL ANALYSIS OF THE GAS TURBINE PLANT WITH EXTERNAL HEAT RECOVERY
VERNICA SORIN-GABRIEL(1), HAZI ANETA(1), HAZI GHEORGHE(1)

The paper analyzes from experimental point of view the energetic and exergetic characteristics of a gas turbine plant (GTP) with heat recovery boiler (RB). For the experimental study of the cogeneration plant are represented the dependences of the thermodynamic parameters and the exergetic flows of the working fluids in the characteristic operating regimes. Unlike the experimental results obtained for the thermal power of RB, those who regard the second principle of thermodynamics conclude the scientific importance of the exergetic analysis.

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INFLUENCE OF KAOLIN-BASED FILLERS ON MECHANICAL BEHAVIOUR OF AN EPOXY RESIN
BUNCIANU DOREL(1,2), TESSIER-DOYEN NICOLAS(2,4), COURREGES FABIEN(2,5), ABSI JOSEPH(2,4), SMITH AGNES(4), LAOUCHEDI DALILA(3), BOUDJEMA BEZZAZI(3)

This work has consisted in studying the effect of the particle size distribution and the added quantity of a kaolin on the tensile mechanical behavior of an epoxy resin. The obtained results have allowed to highlight that a fine particle size distribution of kaolin incorporated in a small proportion (10%) is favorable both to a high stress to rupture and an improved Young’s modulus. When the amount is 20%, the mechanical performance is affected because of the presence of interfacial decohesions (defects) between the larger agglomerates and the matrix.

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CHARACTERIZATION OF HIGH-PERFORMANCE CERAMICS BY METALLIC CAVITY
M. KHALIL DRISSI(1), DAMIEN DI-MARCO(2), NICOLAS DELHOTE(1), OLIVIER TANTOT(1), SERGE VERDEYME(1), THIERRY CHARTIER(2), PIERRE-MARIE GEFFROY(2)

This Paper presents the improvement in the method of ceramic materials characterisation. The ceramic resonators have a cylindric form and are placed in a metal cavity. The optimization of the centering system shows a direct impact on the error report of the resonator complex permittivity.

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NEW LEAD-FREE MATERIALS WITH A1/2BI1/2BO3 FORMULA (A=LI, RB; B=TI)
LELIEVRE JEROME(1), REMONDIERE FABIEN(1), MARCHET PASCAL(1)

The formation of new lead-free materials based on alkali/bismuth couple was studied in the ternary system A2O-Bi2O3-TiO2 (A=Li, Rb). The phase identification has been performed by X-ray diffraction. In both case, compounds with perovskite structure were not observed. However, with the lithium-ion, we can notice the formation of a pyrochlore-like compound, isostructural with Bi2Ti2O7. This compound is known as metastable and decomposing at 650°C. Interestingly, in our case it has been stabilized until 1100°C by the addition of lithium.

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SYNTHESIS AND CHARACTERIZATION OF ZnO NANOPARTICLE
SERDARU IOANA SANDRA(1), VASILE BOGDAN ṢTEFAN(2), NICOARᾸ ADRIAN IONUṬ(2)

Zinc oxide is of particular interest for its use in many applications: varistors, gas sensors, etc. The purpose of this study is to obtain zinc oxide nanoparticles by using the polyol method. The obtained powder was analysed by X-ray diffraction and scanning electron microscopy. Using the X-ray diffraction, one can see that the ZnO is present in a single crystalline phase. The SEM images show spherical particles with a size less than 25 nm.

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MONITORING OF EVOLUTION IN THE SHORT-TERM OF RIVERS FOLLOWING THE ERASING OF A THRESHOLD (GLANE; LIMOUSIN)
J. BOTELLA(1), Y. BRIZARD(2), D. CHAISEMARTIN(1), R. NICOLAU(1)

In this work was monitoring the morphological evolution of a river (Glane) following development thresholds. Erasing the obstacle caused a strong release of fine sediment towards downstream. A change of particle size distribution is well observed in the area with increased downstream fine and coarse appearance of the upstream substrate. In the short term, an improved hydro-morphological characteristic was observed upstream to the arranged threshold. Future measurements campaigns will verify the sustainability of these changes.

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