120 articole găsite pentru „properties”.
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ALIAJE ECOLOGICE PE BAZA DE STANIU PENTRU APLICATII IN INDUSTRIA ELECTROTEHNICA
Dr. ing. Magdalena LUNGU, Ing. Nicolae STANCU, Dr. ing. Violeta TSAKIRIS, Fiz. Lucia LEONAT, Chim. Alexandra BRATULESCU, Fiz. Delia PATROI, Sorina MITREA, Mihai IORDOC, Aristofan TEISANU
Lucrarea prezinta rezultatele cercetarilor privind obtinerea prin turnare a unor aliaje ecologice de tip Sn-Bi-Sb pentru lipire moale in vederea inlocuirii unor aliaje toxice, cum ar fi cele din Sn-Pb 60-40 utilizate pana de curand. Folosirea Pb sau a materia…
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CONSECINTELE HIBRIDARII INTERRASIALE LA ALBINE
Prof. dr. ing. Marian BURA, Asist. dr. ing. Silvia PATRUICA, Drd.ing. Antonina JIVAN, Dr. Cornel Cristian CIOBANAS
Lucrarile de ameliorare in apicultura au rolul de a modifica organismul albinelor, de a imbunatatii calitatile ereditare ale matcilor si albinelor lucratoare in scopul cresterii continue a productivitatii familiilor de albine.Ameliorarea in apicultura prezint…
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METODE SI PROCEDEE DE MASURARE A PROPRIETATILOR PANOURILOR STRADALE FONOABSORBANTE
Drd.ing. Gianina Ileana STAN, Prof.univ.dr.ing.dr.h.c. Ioan CURTU
Lucrarea abordeaza aspecte legate de proprietatile acustice ale barierelor stradale fonoabsorbante alcatuite din materiale compozite, cat si modele constructive ale acestora in functie de puterea de absorbtie si izolarea fonica . Sunt prezentate principalele …
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MODELLING AND CHARACTERIZING NEW MULTIPHASE POLYMERIC COMPOSITES AS MATERIALS FOR HEATING SYSTEMS
Assoc. Prof. D. Luca Motoc, PhD Mitu Leonard
Lucrarea prezinta o parte din rezultatele experimentale si cele predic ionate, utilizand conceptele micromecanicii, ob inute si vizate pentru una dintre proprietat ile de material importante in ceea ce prives te dezvoltarea de materiale i structuri destina…
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Textile supuse tratamentelor antimicrobiene
Lecturer PhD. Daniela Farima, PhD Student. Eng. Gianina Broasca
Lucrarea dezvolta aspecte ce vizeaza modul de prezentare a agentului activ (microcapsule, microsfere, molecule ciclice) in tratamentele antimicrobiene precum si metode folosite pentru obtinerea acestora.Materialele textile constituie un mediu prielnic pentru …
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The physical and chemical structures by milk derivates
Florin M. Dumitrescu
Diferite proprietati fizico-chimice si mecanice ale margarinei, ca plasticitatea, vascozitatea, culoarea, gustul, aromele, punctul de topire, sunt similare cu ale untului de vaca natural, pe care il inlocuieste. In aceasta lucrare de cercetare a fost studiata…
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Influenta dozajului de ciment asupra performantelor betoanelor refractare
Nicolae Angelescu, Cristina Ionita
Obiectivele prezentei lucrari reprezinta realizarea unor betoane cu dozaj redus de ciment si continut ridicat de alumina (pina la 90%). Proprietatile betoanelor refractare depind de dozajul de ciment, de aceea, o scadere a dozajului de ciment din betoane de l…
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THE USE OF THE RADIOFREQUENCY FIELD IN MÖSSBAUER MEASUREMENTS
Ph. D. Dipl.Eng. Ion Bibicu
Aplicarea campurilor de radiofrecventa asupra materialelor feromagnetice induce efecte interesante asupra proprietăţilor acestor materiale. Una din metodele de studiu a ac estor efecte este spectroscopia Mossbauer. A fost realizată o instalaţie pentru aplicar…
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DYNAMICAL BEHAVIOR OF HARDWOOD SPECIES SUBJECTED TO CYCLIC BENDING STRESSES
Mariana Domnica STANCIU, Ioan CURTU, Adriana SAVIN
Hardwood species as beech, maple, cherry, alder are used in common application such furniture, musical instruments, ornaments in automotive construction, panels and floors. The stresses vary in time as intensity, duration and type. From this point of view, so…
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NEW RESEARCH ON COMPOSITE MATERIALS AT THE METAL FORMING RESEARCH CENTRE
Claudia GÎRJOB, Octavian BOLOGA, Gabriel RACZ, Cristina BIRIS
The Metal Forming Research Centre functions as separate research unit within "Lucian Blaga" University of Sibiu, Romania. This is one of the first centres of its kind in Romanian higher education system and emerged under the aegis of the European inter-univer…
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EFFICIENT COMPUTATIONS WITH STRUCTURED MATRIX PENCILS IN AUTOMATIC CONTROL
Vasile SIMA
There is a continuous research effort worldwide to improve the reliability, efficiency, and accuracy of numerical calculations in various domains. One of the most promising research avenue is to exploit the structural properties of the mathematical problems t…
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DISCOVERY OF “QUANTUM NUMBERS” IN THE CARDIOPULMONARY INTERACTION STUDIED IN THERMODYNAMICS WITH FINITE SPEED
Stoian PETRESCU, Valeria PETRESCU , Monica COSTEA, Liliana TIMOFAN, Silvia DANES, Georgeta BOTEZ
The paper proposes an extension of Thermodynamics with Finite Speed (TFS) to Biological Systems, with Cardio-Pulmonary System study as the first objective. It is an extremely important system in the functioning of any blood beings (including humans). For stat…
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COMPARATIVE SUSTAINABLE ANTIBACTERIAL TECHNOLOGIES FOR TEXTILE APPLICATIONS
Diana COMAN, Narcisa VRÎNCEANU, Simona OANCEA, Ioan NEAGU
The present study is both a review regarding the newest methodologies of application of antibacterial agents on textile supports, natural and chemical, and an antithesis focusing on the comparison between well known antibacterial agents, ranging from syntheti…
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MAGNETIC CHARACTERISTICS OF NON-ORIENTED SILICON IRON STRIPS OBTAINED THROUGH MECHANICAL, LASER, ELECTRICAL DISCHARGE AND WATER JET CUTTING TECHNOLOGIES
Horia GAVRILĂ, Veronica MĂNESCU (PĂLTÂNEA), Gheorghe PĂLTÂNEA, Gheorghe SCUTARU, Ioan PETER
The increase of the asynchronous motors efficiency may be usually made by decreasing the total energy losses in the magnetic circuits. Non-oriented silicon iron (NO Fe-Si) sheets are soft magnetic materials with a nearly isotropic grain texture. They are used…
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THEORETICAL CONSIDERATIONS ON THE MICROMECHANICS COMPOSITE MATERIALS
Constantin D. STǍNESCU, Doina TǍRǍBUŢǍ (ENE),Mariana PǍTRAŞCU (ANTONESCU, Melania TĂMAȘ
the efficiency of a composite material is distinguished by the top level of the technical characteristics and its properties. For their study, it appeals to a number of considerations, such as: minimum dimensions of the primary elements of reinforcement secti…
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DETERMINATION OF THE OPTIMAL MATERIAL FOR PERMANENT MAGNETS USED IN THE MANUFACTURE OF HIGHPOWER AUDIO DEVICES
Constantin D. STĂNESCU, Liliana CĂINICEANU
Crowded permanent magnets of NdFeB -type have the superior properties to those intered as shown by the magnetic circuit modeling using finite element method (FEM). Determination of the optimum material for magnetic circuit of high power audio devices is a com…
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VECTORIAL PROBABILISTIC MODEL FOR THE UNBALANCE
FACTOR OF A THREE-PHASE ELECTRICAL NETWORK
Lambert Pierrat (Franta)
In a three-phase power electrical network, the voltage asymmetry can be split into two different components. The first component results from the network structure and possesses almost constant value caused by asymmetry of circuit elements (e.g., lines, tra…
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CARACTERISTICI MECANICE ALE MATERIALELOR COMPOZITE IN DOMENIUL AERONAUTIC
Dr. ing. Dorin ROSU, Ing. Traian TOMESCU, Ing. Tudor TOMESCU (Germania)
Lucrarea prezinta aspecte teoretice si rezultate originale ale incercarilor unor materiale compozite, realizate la Brasov. Datorita proprietatilor inalte mecanice ale compozitelor pe baza de fibre de carbon cu rasini epoxidice, acestea au capatat aplicatii …
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Study of rheological properties of gluten-free flours with the Chopin Mixolab
Iancu Anca, Tucu Dumitru, Damacus Gabriel
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Properties of ANN used in bankruptcy forecast
Molnar Florin, Bebeselea Adriana