724 articole găsite pentru „pH”.
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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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CURRENT RESEARCH DIRECTIONS IN BUILDING PHYSICS IMPROVING PERFORMANCE LEVELS FOR NEW OR RENOVATED BUILDINGS
Adrian RADU, Maricica VASILACHE, Marian PRUTEANU
In the present climatic, social and political conditions, the EU energy independence is emerging as a priority. Therefore, it set new levels of thermal protection minimum required and adapting buildings architecturally to achieve a maximum of energy efficienc…
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HIGH PERFORMANCE MAGNETIC DEVICES BASED ON NANOCRYSTALLINE MATERIALS
Andrei MARINESCU Horia GAVRILA, Ionel DUMBRAVA
During the last two decades remarkable advances occurred in the field of semiconductor devices and smart systems, by their miniaturization and performance increase. Consequently, the reduction of equipment energy consumption and dimensions has resulted. A maj…
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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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THEORETICAL RESEARCH ON THE MODELING OF CHARACTERISTICS OF COMPOSITE MATERIALS
Constantin D. STǍNESCU, Doina TǍRǍBUŢǍ (ENE),Mariana PǍTRAŞCU (ANTONESCU), Melania TĂMAȘ
the two components of the composite material, i.e., the matrix and the wire, take the requests differently compared with their rigidity. The way the force applied is taken over by composite components and their structural deformities depend on the connection …
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MÖSSBAUER EFFECT INVESTIGATION OF FE-C STEEL ELECTROLYTIC GALVANISATION
Ion BIBICU, Caius BULEA, Vasile RUS
Galvanizing is a very well known industrial process for anticorrosive and protection coatings. At first sight, galvanizing should not need any further important research and development involvement but many reasons contradict this appreciation: the constant e…
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A SOLUTION FOR CARBON DIOXIDE STORAGE AND COAL BED METHANE BENEFICIATION IN JIU VALLEY COALFIELD
Dorel ZUGRAVESCU, Nicolae ILIAS, Iosif ANDRAS, Sorin Mihai RADU, Iosif GRUNEANTU, George TESELEANU (Italia), Inga ROSIORU, Chiril GEORGE, Tiberiu IACOB-RIDZI, Cristian TOMESCU
The paper deals with a proposal of an integrated project for CO2 storage coming from the coal burning power plants and a joint CH4 (so called CBM) recovery and its valorization in energetic applications which will lead to a substantial reduction of the delive…
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OSCILLATIONS OF LARGE AMPLITUDE OF A RIGID SPHERE IN A VISCOUS FLUID
Sorin BERBENTE, Corneliu BERBENTE
One considers the oscillations of large amplitude of a pendulum made of a rigid sphere suspended by a cylindrical bar articulated in a fixed point. The motion is two-dimensional and takes place in in a viscous fluid of variable density, initial at rest. The s…
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INTERNATIONAL VISIONS ON THE USE OF NATURAL RESOURCES IN TERMS OF SUFFICIENCY, IN ROMANIA
Nicolae Tiberiu ILIAŞ, Ioan GÂF-DEAC, Ioan I. GÂF-DEAC, Iosif ANDRAS
The paper the use of natural resources in terms of sufficiency is examined, by making operational elements of management and energy diplomacy, published in the early part of the twenty-first century all over the world. In this context, a number of key element…
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RESULTS REGARDING MONITORING OF THE RISKS IN THE ROMANIA-BULGARIA CROSS-BORDER AREA
Gheorghe MANOLEA, Laurențiu ALBOTEANU, Constantin ȘULEA
In the period 2011-2014 was developed the cross-border project RO-BG MIS ETC 166 ”Joint Risk Monitoring during Emergencies in the Danube Area Border ”.The objectives were:1. Conceiving and realization of photovoltaic system for anti-hail units power supply sy…
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CONCEPTUAL DESIGN OF RENEWABLE-BASED ENERGY MIXES FOR SUSTAINABLE COMMUNITIES
Ion VISA, Anca DUTA, Macedon MOLDOVAN, Bogdan BURDUHOS
The transition towards a new, sustainable and affordable energy pattern is defined in the European Union document known as SET Plan (The European Strategic Energy Technology Plan). As the built environment accounts for over 40% of the total energy consumption…
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IMPLEMENTING PID CONTROLLER FOR A MOBILE PLATFORM
Mihai CRENGANIS, Octavian BOLOGA
This paper presents the steps taken to develop and tune a PID controller for a mobile platform built in the Department of Industrial Machinery & Equipment, of the Engineering Faculty of Sibiu. In a first phase, a brief description of the mobile robot is prese…
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THEORETICAL RESEARCHES ON THE STRESS STATE AT VIBRO-DRAWING
Octavian BOLOGA
The paper contains the mathematical modelling of the stress state at vibro-drawing for the case of introducing the vibrating motion on axial direction, by means of the punch, into the drawing die. Starting from the definition of the total radial stress as sum…
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EDUCATION, TRAINING AND SOCIAL INCLUSION
George BĂLAN, Larisa DRAGOLEA
The core element of the society, the element of great importance for all components of the socio-economic system, is education. Education is that which should give the young the ability to perceive the essence (' what ') you should give them the freedom to li…
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PUBLIC POLICIES FOR COMMUNITIES REGENERATION IN MONO-INDUSTRIAL AREAS CASE STUDY: JIU VALLEY, HUNEDOARA COUNTY
Mihai-Ionuț DANCIU, Sabine IRIMIE, Daniel-Ionuț BERINDEANU
25 years after communism has fallen, mono-industrial areas suffer from passing to capitalism. All the mutations produced in time from workers’ migration in micro-regions, territorial closeness and the lack of identity produced closed systems based on the exha…
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ON THE USE AND USEFULNESS OF SOME FUNDAMENTAL MATHEMATICAL CONCEPTS IN ENGINEERING EDUCATION
Liviu GORAȘ
In this communication we present several aspects regarding the ways and characteristics we communicate as well as considerations about the need to systematically use certain fundamental mathematical concepts in engineering education. We insist on the dissimil…
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DEVELOPING A MOBILE PLATFORM FOR EUROBOT 2015
Mihai CRENGANIS, Octavian BOLOGA
This paper presents the steps taken in the development of a mobile platform built in the Department of Industrial Machinery & Equipment, of the Engineering Faculty of Sibiu. In a first phase, a brief classification of mobile platforms is presented, followed b…
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CENTRUL DE COMPETENŢĂ PENTRU TEHNOLOGII SPAŢIALE DIN CONSTANŢA DEDICAT DEZVOLTĂRII SUSTENABILE A REGIUNILOR MARINE ȘI COSTIERE ROMÂNEȘTI – COSMOMAR
Răzvan MATEESCU, Simion NICOLAEV, Luminița BUGA, Gabriel GANEA,Eden MAMUT, Claudiu FERCU, Laurențiu OANCEA
Marea Neagră este bazinul terminal al unei treimi din reţeaua hidrografică a Europei (de cinci ori mai mult decât suprafaţa sa). Dintre toate bazinele oceanului planetar, degradarea mediului în bazinul Mării Negre este cea mai severă. Monitorizarea stării tro…
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POWER QUALITY MONITORING SYSTEM
Eng. Murariu Nicolae, PhD, Eng. Stelian BULIGA, Eng. Mirela-Iulia Savin, Eng.Monica Radu
In scopul realizarii prevederilor Standardului de performanta pentru serviciul de distributie a energiei electrice, EON Moldova Distributie a implementat, incepand cu anul 2009, un sistem centralizat de monitorizare a calitatii energiei electrice in statii …
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MODERNIZATION ELECTRIC SUBSTATIONS 110/20 KV
Eng. Florin DRACEANU PhD, Assoc. Prof. Eng. Cezar Dumitru POPA PhD, Assoc. Prof. Eng. Dumitru Radu PENTIUC PhD, Assoc. Prof. Eng. Leon MANDICI PhD
The subjects ”connection to the national energy system installations producing renewable electricity " is topical and of great importance for future managers of wind power, photovoltaic, biomass cogeneration. Economic situation in Romania also influence the…