Lucian MÂNDREA


32-22 MODIFICĂRILE NIVELULUI DE ENERGIE ALE FIINȚEI UMANE. INFLUENȚE ASUPRA STĂRII PSIHICULUI ȘI A STĂRII DE SĂNĂTATE

the MODIFICATION OF THE ENERGY LEVEL

OF THE human being. iNFLUENCES UPON

THE PSYCHIC STATE AND HEALTH

 

The authors intend to study how the human bio-field responds at a nonphysical stimulus. More precisely, what happens when a person, using special techniques, retire the energy from the exterior of the body through the interior, for 2-3 minutes? The authors find out that this procedure was interpreted by the energetic body as an aggression leading to a state near illness. The subject stopped his actions, not to create damages to the entire human being which could eventually require a treatment. A very important observation of the authors is that during the experiment it was noticed a tendency of hysteresis for the human being, phenomenon which the authors decided to study in the future.

 

Keywords: energy, human being, psychic state, health, Bio Well device

Cuvinte cheie: energie, ființa umană, stare psihică, sănătate, aparatul Bio Well

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32-18 CALCULUL COEFICIENTULUI DE CONTRACȚIE AL UNUI ORIFICIU ȘI REPREZENTAREA GRAFICĂ A REZULTATELOR CU PROGRAMUL SIGMA PLOT

THE CALCULUS OF THE CONTRACTION COEFFICIENT OF AN ORIFICE AND THE GRAPHYCAL RESULTS REPRESENTATION WITH SIGMA PLOT PROGRAMME

 

This paper presents the continuation of the studies from the last two articles presented at the last two Sebeș conferences. The authors used the same numerical method to integrate the Navier-Stokes equations and the presentation is done this time using a Sigma Plot programme. The study is performed with a combination of symmetric and asymmetric orifices at the same Reynolds number. The authors used again the method of finite differences to determine the flow through a tank and through the contracted section of the liquid passing an orifice.

 

Keywords: flow coefficient, current lines, symmetrical orifice, asymmetrical orifice, hydrodynamic spectrum, numerical methods

Cuvinte cheie: coeficient de debit, linii de curent, orificiu simetric, orificiu asimetric, spectru hidrodinamic, metode numerice

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31-24 LIMBA FRANCEZĂ ÎN PUBLICAȚIILE ȘTIINȚIFICE

FRENCH language IN SCIENTIFIC PUBLICATIONS

 

This paper proposes to review the languages in which scientific articles were written in the past and are written in the present. We can remark two antithetic phenomena the supremacy of English and the decay of French a fact which leads, at least for the moment, to the instauration of a single language in the sphere of sciences.

Keywords: scientific publications, decay of French, unique language

Cuvinte cheie: publicații științifice, decadența limbii franceze, limbă unică

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30-70 FENOMENUL DE COLMATARE LA PASAJ DE PEȘTI

THE FISH PASSAGE SILTING PHENOMENON
The paper presents the structure and the hydraulic behavior of a new
type of fish way. The SERB fish passage has four chambers and a cylindrical
shape inside. The chambers are limited by mobile walls with orifices pass for
aquatic organism migration. Results regarding the silt of the fish way are
presented.
Keywords: fish way, design, silting
Cuvinte cheie: scări de pești, proiectare, colmatare

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30-66 ANALIZA OPȚIUNILOR DE COGENERARE PENTRU SISTEME DE TERMOFICARE PE BAZĂ DE BIOMASĂ

ASSESSMENT OF THE COGENERATION OPTIONS
FOR BIOMASS-BASED DISTRICT HEATING SYSTEMS
This paper aims to highlight the need to implement centralized
district heating systems by promoting high-efficiency cogeneration and use
local resources of wood biomass residuals. There are underlined the many
benefits which the centralized heating systems offer locally. Moreover, there
are presented solid arguments underlying the promotion of cogeneration
plants based on solid biomass for a higher security of energy supply at
reliable prices for consumers. Furthermore, this paper analyzes briefly four
types of cogeneration systems designed for a wood biomass-based power
plant, showing the advantages and disadvantages of each technical option.
Keywords: cogeneration, biomass, centralized heating
Cuvinte cheie: cogenerare, biomasă, încălzire centralizată

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29-75 STUDIUL CURGERII ÎN REZERVOARE PREVĂZUTE CU ORIFICII ASIMETRICE

THE FLOW STUDY IN TANKS EQUIPED WITH
ASIMETRIC ORIFICES
This paper presents numerical results referring at the hydrodynamic
spectre of the flow inside a tank with asymmetric orifices. The finite difference
method is used to integrate the Navier-Stokes equations. Besides the
characteristics of the flow inside the tank, it presents interest the determination
of the contraction coefficient of the orifices.
Keywords: hydrodynamic spectrum, numerical methods, contraction
coefficient, orifice
Cuvinte cheie: spectru hidrodinamic, metode numerice, coeficient de
contracție, orificiu

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29-65 EFECTELE DISPOZITIVELOR ELECTRONICE ASUPRA STRUCTURII ENERGETICE A FIINȚEI UMANE ȘI RELAȚIA DINTRE STRESUL CRESCUT ȘI PERFORMANȚA DIMINUATĂ

EFFECTS OF ELECTRONIC DEVICES UPON THE HUMAN
BEINGS ENERGETIC STRUCTURE AND THE POSSIBLE
RELATION BETWEEN INCREASED STRESS AND
DIMINISHED PERFORMANCE
This paper examines the effects which the use of electronic devices
may have upon the energetic body of the human being, measured with the
electro-photonic imaging device. The study offers a new perspective upon the
possible effects which may be caused by the use of electronic devices on the
human being. The study is a case study, and may, if considered appropriate,
lay the foundation for a long-term study including more subjects.
Keywords: electro-photonic imaging device, stress, energy, energetic
body
Cuvinte cheie: dispozitiv electro-fotonic, stres, energie, înveliș
energetic

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29-57 ANALOG TO DIGITAL CONVERTER IN DIGITAL PROTECTIVE RELAYS

CONVERTOR ANALOG-DIGITAL
ÎN RELEE DIGITALE DE PROTECȚIE
The accuracy and the speed of decision making of the protection
relays are very important to maintain the continuity of supply to the electrical
power system during different disturbances.
A/D Converter shares an important role in achieving that requirement,
so that all types of A/D Converters used in power relaying applications will be
discussed in this paper and some recommendations will be offered depending
on that discussion.
Acuratețea și viteza de luare a deciziilor a releelor de protecție sunt
foarte importante pentru a menține continuitatea aprovizionării sistemului de
energie electrică în timpul diferitelor perturbații.
A/D convertorul analog-digital are un rol important în realizarea acestei
cerințe, astfel încât toate tipurile de convertoare A/D utilizate în transmiterea
aplicațiilor de putere vor fi discutate în această lucrare și unele recomandări vor
fi oferite în funcție de această discuție.
Keywords: digital relay, digital signal processing, electrical power
system, digitization, quantization, sampling
Cuvinte cheie: releu digital, procesare a semnalului digital, sisteme de
energie electrică, digitizare, cuantizare, eșantionare

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29-46 OPTIMIZAREA FUNCȚIONĂRII UNEI PRIZE DE APĂ ECOLOGICE PRIN TESTAREA UNUI MODEL LA SCARĂ REDUSĂ

ECOLOGICAL WATER INTAKE OPTIMIZATION BY SMALL
SCALE MODELLING
The main objective of the paper is to demonstrate the efficiency of an
ecological water intake by optimizing its operation using experimental modelling
techniques. The tests have been performed on a dedicated small scale model
integrated in a specially design testing flume.
This paper presents the general considerations regarding the ecological
intakes for Mountain Rivers and focuses on identifying design methods suitable
for performance increasing. A simplified prototype installation was designed
starting from the patented sand-less ecological intake. Based on this design, a
1:10 small scale model was developed and installed in a dedicated stand. It
was possible to determine the water speed, the flow from the main channel and
the captured flow in different testing conditions, by using specific measuring
equipment and methods. The obtained results were transposed to the prototype
installation by applying Froude similarity criteria, proving to be useful to the
elaboration of the main design parameters for water intakes.
Keywords: water intakes, Mountain Rivers, experimental model, similarity
Cuvinte cheie: prize de apă, râuri de munte, model experimental,
similitudine

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27-58 MODELE PENTRU CALCULUL VIITURII MAXIME PROBABILE (VMP) ŞI ANALIZA DISTRIBUŢIEI ÎN TIMP Partea a II-a

MODELS FOR MAXIMUM PROBABLE FLOW CALCULATION AND THE TIME DISTRIBUTION ANALYSE – PART II
This paper presents an approach to estimate the maximum flow calculation and the time distribution analyse for different rivers from Romania.
Keywords: maximum probable flow calculation, time distribution, maximum probable rain
Cuvinte cheie: Viitura maximă probabilă, distribuție în timp, precipitația maximă probabilă

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27-57 MODELE PENTRU CALCULUL VIITURII MAXIME PROBABILE (VMP) ŞI ANALIZA DISTRIBUŢIEI ÎN TIMP Partea I-a

MODELS FOR MAXIMUM PROBABLE FLOW CALCULATION AND THE TIME DISTRIBUTION ANALYSE – PART I
This paper presents an approach to estimate the maximum flow calculation and the time distribution analyse for different rivers from Romania.
Keywords: maximum probable flow calculation, time distribution, maximum probable rain
Cuvinte cheie: Viitura maximă probabilă, distribuție în timp, precipitația maximă probabilă

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27-55 DETERMINAREA SOLICITĂRILOR PRIZELOR DE APĂ CU CONDUCTE ÎNGLOBATE ÎN PILE

THE STRESS DETERMINATION FOR WATER
INTAKES WITH PIPES INSIDE PILES
This paper presents the initial stress calculations performed in order to validate a future innovative solution which incorporates both the sluices and the water intake with the supply pipes embedded within the concrete piles.
A brief calculus was done to estimate the supplementary forces involved in the dam stress. It starts from simplifying assumptions in order to estimate the stress supported by the concrete piles. The obtained results will be furthermore used to determine if the envisaged solution requires special methods of foundation or structural reinforcement.
Keywords: water intakes, supply pipes, dam cells, dams
Cuvinte cheie: prize de apă, conducte de alimentare, pile, baraje

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27-54 UTILIZAREA METODELOR NUMERICE PENTRU ESTIMAREA COEFICIENTULUI DE CONTRACȚIE AL UNUI ORIFICIU

THE USE OF NUMERICAL METHODS FOR ESTIMATING
THE CONTRACTION COEFFICIENT OF AN ORIFICE
This paper presents one of the numerical methods that integrate the Navier-Stokes equations, namely the method of finite differences, in order to determine the flowing through a tank and the contracted section of the liquid passing through an orifice.
Keywords: flow coefficient, current lines, orifice, numerical methods
Cuvinte cheie: coeficient de debit, linii de curent, orificiu, metode numerice

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25-60 VARIAŢIA COEFICIENTULUI DE DEBIT LA ORIFICII MICI CU VÂSCOZITATEA ŞI TENSIUNEA SUPERFICIALĂ

THE VARIATION OF SMALL ORIFICES DISCHARGE
WITH VISCOSITY AND SUPERFICIAL TENSION
This paper presents a synthesis of theoretical and experimental
results concerning the discharge coefficient of hydraulic orifices and its
dependence on Reynolds number for the case of fluids with known physical
properties. The experimental researches performed in laboratory emphasize
the influence of superficial tension and viscosity on the discharge through a
small orifice of 3 mm diameter. For the investigated range of superficial
tensions and viscosities (σ = (23 ÷ 80) ·10-3 N/m and η = (1.1 ÷ 910)·10-3 Pa·s),
there was found a linear dependence of discharge on lg Re and lg100We.
Keywords: orifice, discharge coefficient, superficial tension, viscosity
Cuvinte cheie: orificii, coeficient de debit, tensiune superficială,
vâscozitate
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25-42 REDUCTOARELE DE PRESIUNE DIN AMENAJĂRILE HIDROTEHNICE

THE PRESSURE REDUCERS FROM HYDROTECHNICAL APPLIANCES
This paper presents two types of pressure reducers which can be
used for different interior diameters of the pipes. There are presented all the
working characteristics for every reducer. The models presented are very
simple and inexpensive so that the final results could be very good.
Keywords: pressure reducers, working characteristics, hydro technical
appliances
Cuvinte cheie: reductoare de presiune, caracteristici de funcționare,
amenajări hidrotehnice
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25-34 CREŞTEREA SIGURANŢEI ÎN EXPLOATARE A BARAJULUI IZVORU MUNTELUI PRIN MODERNIZAREA ECHIPAMENTELOR HIDROMECANICE ALE GOLIRILOR DE FUND

INCREASING THE OPERATING SAFETY OF THE IZVORU
MUNTELUI DAM THROUGH THE HYDRO-MECHANICAL
EQUIPMENT MODERNIZATION OF THE BOTTOM OUTLETS
Bottom outlets are considered to be the most important hydraulic
structures in dams. They have an essential role in filling and emptying the
reservoir thus preventing flood risks, maintaining the safety operation, removing
sediments and allowing rehabilitation works. This paper presents the solutions
for increasing the operating safety of the Izvoru Muntelui dam through the
hydro-mechanical equipment modernization of the bottom outlets starting from
the operational issues that occurred over time. The solutions mainly aim to
eliminate the vibrations during the valves operation and to identify ways that will
allow the service and the maintenance of the bottom outlet valves. Fitting a
valve downstream, at the end of the bottom outlet will increase the safety
degree, allowing the operation of the existing valves in balanced pressure
conditions, thus avoiding undesired vibrations.
Keywords: bottom outlet, jaw valve, Venturi tube, cofferdam
Cuvinte cheie: golire de fund, vană cu fălci, tub Venturi, batardou
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