2019


35-57 ANALIZA COMPLEXITĂȚII UTILIZÂND ELEMENTE NELINIARE DE TIP DIODĂ CHUA

COMPLEXITY ANALYSIS USING CHUA DIODE NONLINEAR ELEMENTS

This paper work treats the inter-systemic simulation between the Chua circuit and other systems with similar behavior. Like a sugestive example is presented by the Lorenz’s system and it is made the interpretation of similitude between the two physic systems.

Keywords: system, chaos, signal, nonlinear element Cuvinte cheie: sistem, haos, semnal, element neliniar

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35-58 PERCEPȚIE SUBLIMINALĂ ȘI FACTORI EXTERNI ÎN RECLAMELE DE TELEVIZIUNE

SUBLIMINAL PERCEPTION AND EXTERNAL FACTORS IN TV COMMERCIALS

       In this paper we examined the subliminal perception of exposure to TV commercials and identified which variables cause consumers to take the buying decision. We conducted an experiment that highlighted the fact that, besides the subliminal perception of advertisements, external factors have an important role. By the descriptive method we have highlighted the mechanisms that contribute to the positive perception of the brand. Novelty is precisely the extension of this concept of subliminal advertisements in the cognitive field, in the processing of information and in behavioral change as a result of exposure to TV commercials and external factors. 

Keywords: subliminal perception, external factors, TV commercials, brand perception Cuvinte cheie: percepția subliminală, factorii externi, reclamele TV, percepția mărcii

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35-59 ÎMBUNĂTĂȚIREA CITIRII ÎN PLANUL TIMPFRECVENȚĂ A SEMNALELOR FOLOSITE PENTRU A DETERMINA COEFICIENTUL DE RIGIDITATE DINAMIC

IMPROVING THE TIME-FREQUENCY READING OF THE SIGNALS USED TO DETERMINE THE DYNAMIC STIFFNESS COEFFICIENT

The objective of the paper is to describe and determine the Fourier transform to define a passage relation of a signal from the time domain to a frequency domain. The process allows the identification of frequencies but does not provide complete information about the behavior of the system, in the sense that it does not allow the interpretation of frequency evolution over time. For this reason, I propose the use of time-frequency analysis.

Keywords: reading, signal, time-frequency, stiffness Cuvinte cheie: citire, semnal, timp-frecvență, rigiditate

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35-60 INTERNETUL CA FENOMEN MEMETIC

THE INTERNET LIKE MEME PHENOMENON

This paper presents the impact of WWW technology into social media with effect in real life, talking about a virtual interrelation between the social partners. Like in biological area, were the gene is the main replicator unity, same thing in cultural area being the meme. So is natural to be developed an evolutionary theory based on the memes, following the Darwin’s evolutionary theory line.

Keywords: evolutionary theory, gene, meme, Internet, WWW Cuvinte cheie: teoria evoluționistă, genă, memă, Internet, WWW

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35-61 ASPECTE PRIVIND UTILIZAREA ENERGIEI SOLARE Partea I

ASPECTS ON THE USE OF SOLAR ENERGY – Part I

Most human activities, the size, volume and quality of goods and services available to mankind are energy dependent, with energy playing a central role in human existence, being the most important resource. At present, fossil fuel carriers are the fuel of the world economy, and humanity is geared towards using abundant energy at a relatively low price. Alternative sources such as sun, wind, hydropower, wave energy, geothermal energy, bioenergy etc. it is practically not consumed, calling it renewable (alternative or unconventional sources). They produce far fewer emissions, reduce chemical, thermal, and radioactive pollution, and are available theoretically anywhere in the world. The sun is a real blessing, giving us in an hour – enough energy for all people to use it for one year. Every day, about 120,000 terawatts (TW) of electrical power is offered to us by the sun. That, while over a year, the world uses only 15 TW of energy. The paper analyzes some aspects regarding the use of solar energy: collectors, solar power stations, solar houses.

Keywords: solar energy, types of renewable energy, history, heat fluxes, energy radiation, solar collector, nuclear energy Cuvinte cheie: energie solară, tipuri de energii regenerabile, istoric, fluxuri termice, radiaţii energetice, colector solar, energie nucleară

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35-62 ASPECTE PRIVIND UTILIZAREA ENERGIEI SOLARE Partea a II-a

ASPECTS ON THE USE OF SOLAR ENERGY – Part II

Most human activities, the size, volume and quality of goods and services available to mankind are energy dependent, with energy playing a central role in human existence, being the most important resource. At present, fossil fuel carriers are the fuel of the world economy, and humanity is geared towards using abundant energy at a relatively low price. Alternative sources such as sun, wind, hydropower, wave energy, geothermal energy, bioenergy etc. it is practically not consumed, calling it renewable (alternative or unconventional sources). They produce far fewer emissions, reduce chemical, thermal, and radioactive pollution, and are available theoretically anywhere in the world. The sun is a real blessing, giving us in an hour – enough energy for all people to use it for one year. Every day, about 120,000 terawatts (TW) of electrical power is offered to us by the sun. That, while over a year, the world uses only 15 TW of energy. The paper analyzes some aspects regarding the use of solar energy: collectors, solar power stations, solar houses.

Keywords: solar energy, types of renewable energy, history, heat fluxes, energy radiation, solar collector, nuclear energy Cuvinte cheie: energie solară, tipuri de energii regenerabile, istoric, fluxuri termice, radiaţii energetice, colector solar, energie nucleară

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35-63 CONSIDERAȚII ASUPRA ENERGIILOR REGENERABILE – ENERGIA SOLARĂ

CONSIDERATIONS ON RENEWABLE ENERGY – SOLAR ENERGY

This paper briefly describes the main renewable energies on our planet. It also describes the solar energy used for the preparation of hot water and the heating of homes. Last but not least, the transformation of solar energy into electricity required for home appliances in a home such as telephones, lighting, television, etc.

Keywords: solar energy, electricity, hot water, solar panel Cuvinte cheie: energie solară, energie electrică, apă caldă, panou solar

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35-64 PILELE DE COMBUSTIBIL – SOLUȚIE TEHNOLOGICĂ DE COGENERARE A ENERGIEI

FUEL FILES – TECHNOLOGICAL SOLUTION COGENERING OF ENERGY

In a simple and usual manner, the consumer covers the necessary of heat and electricity from one’s own boiler with fossil fuel, respectively by buying electric energy from system. When a request of thermal and electric energy occurs, the simultaneous production of both types of energy is more efficient, with the same type of equipment, rather than producing them separately. CHP, as a combined and simultaneously solution to produce electric and thermal energy, based on the fuel cell technology, by its energetic, economic and ecological advantages, it is part of the “clean” technologies category to produce energy.

Keywords: CHP, fuel cells, hydrogen Cuvinte cheie: cogenerare, pile de combustibil, hidrogen

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35-65 MIŞCAREA FLUIDELOR PRIN EJECTOARE. APLICAȚII ÎN CONSTRUCȚIA RACHETELOR

FLUID MOVEMENT THROUGH THE EJECTORS MISSILE BUILDINGS ENGINEERING APLICATIONS

This paper presents some features of evolutionary parameters on fluid flow through the ejector gaso dynamics. Ejectors are devices with wide applicability gaso dynamics in the technical field and especially in the military.

Keywords: ejector, rocket, blending chamber, gas dynamics parameters, ejection coefficient, trained fluid, drive fluid Cuvinte cheie: ejector, rachetă, cameră de amestec, parametri gazodinamici, coeficient de ejectie, fluid antrenat, fluid de antrenare

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35-66 MEDIUL VIBRAŢIONALPRODUS DE UTILAJELE DIN INDUSTRIA ALIMENTARǍ CU ACŢIUNE ASUPRA OPERATORULUI UMAN

VIBRATION ENVIRONMENT PRODUCED BY FOOD INDUSTRY WITH ACTION ON HUMAN OPERATOR

The grinding of cereals and other grains began to be practiced from the Neolithic, with the appearance of the first stones moths, evolving extremely rapidly in modern times to the present complex milling facilities. Milling is aimed at shredding and transforming grain and some legumes into flour and wheat. As a percentage, wheat occupies the first place in milling, the most common species being common wheat.

Key words: mill, grinding, vibration, grain, food industry Cuvinte cheie: moară , măcinare, vibrații, cereale, industrie alimentară

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35-67 PROTOTIPAREA RAPIDĂ LA SCARĂ UTILIZÂND KITUL EDUCAŢIONAL LEGO MINDSTORMS NXT

RAPID PROTOTYPING SCALE USING LEGO MINDSTORMS NXT EDUCATIONAL KIT

The main objectives of the paper aim to familiarize them with the concept of rapid prototyping scale and mechatronic modules, or components LEGO Mindstorms. Theoretical aspects are presented since their encounter in practical applications. Resorting to progressive design functionality using graphical programming means NXT-G, as the mechanical structure is built to foster interdisciplinary thinking specific mechatronics.

Keywords: rapid prototyping, programming means, reconfigurability, mechatronics platform, sensor, actuator, controller Cuvinte cheie: prototipuri rapide, mijloace de programare, reconfigurabilitate, platformă mecatronică, senzor, actuator, controler

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35-68 APLICAȚII LA PROTOTIPAREA RAPIDĂ LA SCARĂ UTILIZÂND KITUL EDUCAŢIONAL LEGO MINDSTORMS NXT

APPLICATIONS TO RAPID PROTOTYPING SCALE USING LEGO MINDSTORMS NXT EDUCATIONAL KIT

The paper is dedicated to the succinct presentation of the mechatronic concepts needed to promote innovation, creativity and interdisciplinarity. The main objectives of the paper aim to familiarize them with the concept of rapid prototyping scale and mechatronic modules, with components LEGO Mindstorms. The first application is made using the course-related instructions. In the second application, we performed a functional replica of a given structure (with a minimum of elements), without detailed installation instructions.

Keywords: rapid prototype, programming means, sensor, actuator, controller, mechatronic platform, reconfigurability Cuvinte cheie: prototip rapid, mijloace de programare, senzor, actuator, controler, platformă mecatronică, reconfigurabilitate

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35-69 ASPECTE PRIVIND REABILITAREA-MODERNIZAREA INSTALAŢIEI DE ILUMINAT DINTR-UN ATELIER DE MECANICĂ AUTO

ASPECTS REGARDING THE REHABILITATIONMODERNIZATION OF THE LIGHTING FACILITY OF AN AUTO MECHANICAL ENGINEER

The modernization of the general and local artificial lighting system in a workshop of motor mechanics is an important element in the development of professional activity in this field.

Keyboard: General artificial lighting, local lighting, auto mechanic workshop Cuvinte cheie: Iluminat artificial general, iluminat local, atelier mecanic auto

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35-70 STUDIUL PRIVIND VERIFICAREA TANGENTEI δ A ULEIULUI ELECTROIZOLANT

STUDY ON VERIFICATION OF TANGES DATES OF INSULATING OIL

The paper presents a study regarding the determination of the dielectric loss factor of the insulating oils at the filling of the power transformers. This study is complemented by: electrical equipment for determination of tg δ, mode of execution of the test, interpretation of the results. The purpose of this case study is to evaluate the electro-insulating state in order to standardize the apparatus and the adopted measurement methods in order to obtain reproducible results and to make a decision on replacement, refurbishment by filtration, drying.

Keywords: Tanges, insulating oil, transformer, verification Cuvinte cheie: tangentă, ulei electroizolant, transformator, verificare

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35-71 STUDIUL ECHILIBRULUI ŞI STABILITĂŢII OCUPANTULUI UNEI PLATFORME ÎN MIŞCARE

STUDY OF EQILIBRIUIM AND STABILITY FOR THE PERSON ON THE PLATFORM IN MOTION

The paper contains a short study of the equilibrium and stability in motion for a person who is on the mobile platform. This study is necessary to optain the adaptiv possibility of any person if the support of walking is in monition for this was used a platform named HUBER 360 MD. Was relializes a lot of 6 tests in following steps: stability, unipodal test, walking test, stability limited test, mobility restricted test, power test.

Key words: balance study, stability study, mobile platform Cuvinte cheie: studiul echilibrului, studiul stabilității, platforma mobilă

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35-72 UNELE CONSIDERAȚII PRIVIND ACOPERIRILE METALICE ELECTROCHIMICE ȘI CHIMICE

SOME CONSIDERATIONS ON ELECTROCHEMICAL AND CHEMICAL METAL COVERINGS

This paper briefly presents electrochemical and chemical metallic coatings. Coatings of various parts with metallic layers is done especially for: Increasing the corrosion resistance, improving the appearance, increasing the superficial hardness, increasing the resistance to wear. Metallic coatings can be made: electrochemically, thermally, by spraying, chemically, by plating, amalgamation, by conversion, and by vacuum evaporation.

Keywords: metallic coatings, electrochemical coatings, chemical composition, nickel electrolytes, copper electrolytes Cuvinte cheie: acoperiri metalice, acoperiri electrochimice, compoziție chimică, electroliți de nichelare, electroliți de cuprare

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35-73 MANSARDARE VERSUS REABILITARE TERMICĂ

MERSARDARE VERSUS THERMAL REHABILITATION

This paper makes an analysis over the thermal rehabilitation process in Romania taking in consideration existing and future developments. Today’s national financing programs do not offer a sustainable answer to the CO2 emission reduction goal due to the fact that this is a punctual solution and offer small improvement for interior comfort of dwellings and energy savings.

Keywords: thermodynamics, economic viability, thermal rehabilitation Cuvinte cheie: termodinamică, viabilitate economică, reabilitare termică

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35-74 PROPUNERI DE MODERNIZARE A COLTERM TIMIȘOARA

PROPOSALS FOR THE MODERNIZATION OF TIMISOARA COLTERM

In our paper we perform a SWOT analysis of the thermal energy distribution system in Romania. The case study will refer to the local district heat company of Timisoara, SC Colterm SA. For this company, its current situation will be analyzed and solution for the modernization will be proposed, directly referring to cogeneration solutions for the thermal energy, losses reduction solutions, pollution reduction solutions.

Keywords: district heating, SWOT analysis, distribution network losses, alternative energy sources Cuvinte cheie: termoficare, analiza SWOT, Colterm, pierderi din rețea, surse alternative de energie

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35-75 EFECTELE VENTILAȚIEI MECANICE LONGITUDINALE ASUPRA MIȘCĂRII FUMULUI DEGAJAT DE UN INCENDIU ÎNTR-UN TUNEL DE METROU

EFFECTS OF LONGITUDINAL MECHANICAL VENTILATION ON THE FIRE SMOKE MOVEMENT IN A SUBWAY TUNNEL

The smoke and toxic gases released from a subway fire contain a number of harmful elements to the human body. Thus, long-term smoke exposure is the main cause of the large number of casualties in such an event. To protect the lives of people caught by a fire in the subway, it is necessary to use smoke evacuation systems. Thus, longitudinal mechanic ventilation systems can be used. During the use of these systems, the smoke movement inside the tunnel is characterized by phenomena such as backlayering, reverse flow or bifurcation flow.

Keywords: smoke movement, subway station, backlayering, reverse flow, bifurcation flow Cuvinte cheie: mișcarea fumului, stație de metrou, intoarcerea stratului de fum, inversarea fluxului, fluxul de bifurcatie

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35-76 ASPECTE PRIVIND MIȘCAREA FUMULUI GENERAT DE INCENDIU ÎN STAȚIILE DE METROU

ASPECTS OF FIRE SMOKE MOUVEMENT IN SUBWAY STATION

The development of computer applications in the field of fluid dynamics has led to increased numerical fire simulations in underground stations, tunnels or underground structures. From a constructive point of view, the subway stations are characterized by large openings, by which they enter sufficient amounts of air, which can, in the case of a fire, either to feed with oxygen combustion or to contribute to the evacuation of smoke. When a fire is held in a subway station, the amount of smoke emitted usually floods the subway station or the tunnel (depending on the place of the fire outbreak), including the evacuation routes of passengers. This leads to reduced visibility and can cause deaths from smoke intoxication. Thus, one of the main concerns is the protection of the escape stairs from the danger represented by the smoke emitted from the fire. On the other hand, it is essential that firefighters reach as close as possible to the fire outbreak and extinguish it.

Keywords: smoke movement, subway station, experiments and numerical studies, safety evacuation Cuvinte cheie: mișcarea fumului, stație de metrou, experimente și studii numerice, evacuare în condiții de siguranță

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35-77 FACTORI POLUANȚI AI MIJLOACELOR DE TRANSPORT. MODALITĂȚI DE ATENUARE A EFECTELOR NOCIVE

TRANSPORT MEDIUM POLLUTING FACTORS. PROCEDURES FOR ATTENUATION OF NOCIVE EFFECTS

The work shall be have some ways of analysis of the chemistry of internal combustion engines of the means of transport. The results obtained allow the assessment variation in time of noise nuisance concentrations in the atmosphere free.

Keywords: gas diffusion, concentration, diffusion coefficient, concentration gradients, pollutant cloud, noxious effects, finite element Cuvinte cheie: difuzia gazelor, concentraţie, coeficient de difuzie, gradienţi de concentraţie, nor poluant, efecte nocive, elemente finite

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35-78 DETERMINAREA DEBITULUI LA CENTRALELE HIDROELECTRICE DE MICĂ CĂDERE DOTATE CU TURBINE KAPLAN

DETERMINATION OF FLOW RATE AT LOW HEAD HYDRO POWER PLANTS FEATURE WITH KAPLAN TURBINES

In the paper there are presented some methods of determination of the flow rate measurements in low head hydro power plans are also presented with a series of field studies. The most commonly used method for determining the flow in convergent measurement sections is the multipoint velocity measurement with propeller type current meters. For flow rate evaluation integration of the difference between measured velocities and a known velocity distribution is recommended. One of the newest methods of flow determination in intakes is the acoustic scintillation method, a cross-correlation method. For accurate results the scintillation method must be installed downstream of trash racks. Another method that can also be adopted to measurements in low head, is method of acoustic transit measurement, but new procedures for determination weighing the individual path velocities have to be applied due to varying shape of the flow cross sections. At the end of the paper a comparative analysis is made between the methods for determining the flow rate in the convergent measuring sections

Keywords: flow rate measurement, Winter-Kennedy method, efficiency, acoustic scintillation, acoustic transit time, velocity – area Cuvinte cheie: măsuratori debitmetrice, metoda Winter-Kennedy, randament, metoda scintilaţiei acustice, metoda acustică a timpului de tranzit, metoda viteză– arie

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35-79 SISTEM MODERN DE MONITORIZARE A UNUI CURS DE APĂ

MODERN WATER COURSE MONITORING SYSTEM
The Romanian legislation provides for protection of the quality of surface water. This requires continuous follow-up or a certain time period of water quality of rivers and lakes. The paper presents an automatic water quality tracking system using modern methods of transmitting and interpreting remote data using computing technique.
Keywords : Surface water quality, monitoring, monitoring stations Cuvinte cheie : calitatea apelor de suprafață, monitorizare, stații de monitorizare
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35-80 OBȚINEREA APELOR ACTIVATE ȘI UTILIZAREA LOR

OBTAINING ACTIVATED WATER AND THEIR USE

The process of activating water is a complex process. Theoretically, it does not change the chemical composition of water, but hydrogen and oxygen ions occur, which are very active. These ions are unstable and as a result the water ionization phenomenon disappears after 48 hours. The paper shows how to obtain activated water and the areas of use.

Keywords : Water activated, water activation process, ionized water use Cuvinte cheie: apa activată, proces de activare a apei, utilizare apă
ionizată

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35-81 ANALIZA FIABILITĂŢII STAŢIEI DE TRATARE A APEI GILĂU DIN SAA “SOMEŞ” CLUJ

RELIABILITY ANALYSIS OF THE WATER TREATMENT PLANT IN THE “SOMEŞ” SA CLUJ
ABSTRACT
The paper analyzes the reliability of the Gilau water treatment plant within the „Someş” water distribution system in Cluj, by implementing the modern method of analysis FMECA.
Following the assessment of the reliability and critical condition of the components of the treatment plant, appropriate measures have been identified that have led to a reduction in the degree of risk and the framing of most components in the area of risk acceptance. It also highlights the high risk elements that need to be further analyzed to reduce the risk, reduce the failure rate and increase operational safety.
Keywords: Water treatment plant, reliability analysis, FMECA procedure
Cuvinte cheie: Staţia de tratare a apei, analiza fiabilităţii, utilizarea metodei AMDEC.

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35-82 CONTROLUL COROZIUNII ŞI DEPUNERILOR IN CONDUCTELE PENTRU TRANSPORTUL APEI

CONTROL OF CORROSION AND DEPOSITS IN THE WATER TRANSPORT PIPES
ABSTRACT
The paper analyzes the corrosion and deposition processes that occur as a result of the interaction between water and water distribution systems, the influence on the water quality and the reliability of the components, and the methods for controlling and reducing these phenomena. The experimental researches consisted in the application of a chemical method of corrosion control using a solution based on silicates and orthophosphates, completely water soluble and harmless for consumer. Research results have highlighted the fact that this method has significantly reduced corrosion and deposition, also ensuring the preservation of water quality during water transport via pipeline.
Keywords: corrosion control, water pipes, deposits, chemical method
Cuvinte cheie: controlul coroziunii, conducte, depuneri, metodă chimică

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