2025

C15-STUDIU PRIVIND TESTAREA ȘI EVALUAREA PERFORMANȚELOR UNUI PROTOTIP DE MAȘINĂ DE SPART NUCI

Această intrare a fost publicată în 2025 și etichetată Ferenc GASPAR Marius-Florin TODORAN la de

TESTING AND PERFORMANCE EVALUATION OF A NUT-CRACKING MACHINE PROTOTYPE
Abstract: This study presents the design, construction and experimental testing nut-cracking machine prototype intended for household and small-scale farm applications (with emphasis on walnut, Juglans regia). The mechanical solution consists of a rotating cylindrical shaft and an adjustable reaction plate mounted inside a cracking chamber. A representative sample of one hundred walnuts was measured (dimensional statistics) and nine experimental trials were conducted with cracking gap settings between 26 mm and 41 mm; each test processed 1 000 g of nuts and categorized in fully cracked, partially cracked and intact kernels. Experimental analysis identified a narrow optimal gap range (≈30–31 mm) that maximizes intact-kernel yield. The prototype is suitable for household and small-scale farm use and can be further developed toward automation and higher productivity.
Keywords: nut-cracking machine, prototype, experimental testing, adjustment optimization, performance evaluation
Cuvinte cheie: mașină de spart nuci, prototip, testare experimentală, optimizare reglaj, evaluare performanță.

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C14-CONTRIBUȚII PRIVIND DEZVOLTAREA UNUI SISTEM AERIAN, MULTIFUNCŢIONAL PENTRU ÎNSĂMÂNȚARE ȘI DISTRIBUȚIE ÎNGRĂŞĂMINTE

Această intrare a fost publicată în 2025 și etichetată Cristina-Alexandra BÎTFOI Ioan Aurel CHERECHEŞ la de

CONTRIBUTIONS TO THE DEVELOPMENT OF A MULTIFUNCTIONAL AERIAL SYSTEM FOR SOWING AND DISTRIBUTING FERTILIZERS
Abstract: The purpose of the paper is to create and develop a device for sowing and distributing fertilizers, suspended from an unmanned aerial vehicle (UAV) and displaying data in an HTML page6. This device is designed to provide superior performance in hard-to-reach areas, such as highway slopes, riverbanks, and mountainous areas, compared to existing agricultural equipment7. The work includes the analytical calculation and design of the device, a description of the Arduino IDE code, the HTML interface, and the electronic components used8. The final chapters present the performed measurements, determination of rotation speeds (RPM), and the final results9.
Keywords: UAV, Sowing, Fertilization, Precision Agriculture, Arduino, Distributed System.

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C13-INVESTIGAREA NUMERICǍ A ANGRENAJELORMELC-ROATǍ PLANĂ ŞI SIMULAREA CAD AGENERǍRII CINEMATICE A DINTELUI ROȚII PLANE

Această intrare a fost publicată în 2025 și etichetată Ileana-Dacia NAPĂU Ioan NAPĂU Mircea NAPĂU la de

NUMERICAL INVESTIGATION OF PLANE WHEEL GEARS
AND CAD SIMULATION OF THE KINEMATIC GENERATION
OF THE PLANE WHEEL TOOTH
ABSTRACT: In preceding research, the concept of Computer
Manufacturing Simulation (CMS) was developed by authors as a novel and
intuitive interface of 3D Computer Aided Design (CAD) systems used in
Virtual Reality (VR) engineering. Current research focuses on numerical
investigation of worm-face gear drives geometry and applicability of the CMS
method in simulation of face gear tooth kinematical generation. Firstly, a
novel program IGD (Interactive Graphic Design), for calculus and verification
of worm-face gear drives has been developed in a MathCAD environment.
Secondly, the paper concentrates on the virtual simulation of the face gear
tooth generation by CMS method. Numerical examples illustrate and validate
the developed approach.
.
Cuvinte cheie: angrenaj melc-roată plană, computer manufacturing
simulation, virtual reality, interactive graphic design.

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C12-CREATIVITATEA ȘI TEHNICA

Această intrare a fost publicată în 2025 și etichetată Daniela GOIA la de

Comportamentul unui individ este creativ dacă este original şi
oportun.
Creativitatea nu se confundă cu talentul, cu inteligenţa sau cu
dotarea unei persoane.
O altă pistă tentantă pentru descoperirea indicilor creativităţii
este excentricitatea: oamenii care se poartă ciudat, care nu se
conformează normelor societăţii, care se comportă consecvent ca nişte
inadaptabili ar putea fi etichetaţi drept creativi, mai ales aceia care sunt
generoşi din fire.
Creativitatea nu înseamnă nici imitaţie.

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C11-CINEMATICA PROCESULUI DE GENERARE ALSUPRAFEŢELOR ELICOIDALE LA SCULEAŞCHIETOARE CU AJUTORUL CUPLEI CINEMATICE DETIP ROLĂ-CILINDRU

Această intrare a fost publicată în 2025 și etichetată Alexandru MICACIU la de

KINEMATIC PRINCIPLE OF GENERATION OF HELICAL
SURFACES AT THE CUTTING TOOLS
Helicoidal cylindrical surfaces are used for releasing surfaces of
cutting tools The paper present aspects about the kinematic principle of
generation of the helical surfaces at the cutting tools
Cuvinte cheie : mişcare elicoidală, presiune de contact, frecare de rulare

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C10-STUDIUL FENOMENULUI DE REZONANŢĂÎN CIRCUITELE DE CURENT ALTERNATIV

Această intrare a fost publicată în 2025 și etichetată Liliana DACHE la de

STUDDY OF THE RESONANCE PHENOMENON
IN ALTERNATIVE CURRENT CIRCUITS
In general, the sources of electrical energy that supply electrical
circuits provide them with both active power, necessary for various uses, and
reactive power, corresponding to the variation of the energy stored in the
electric and magnetic fields of the network. In certain particular cases, it is
possible that while energy is accumulated in some of these fields, in the other
fields the energy decreases by an equal amount, the electric and magnetic
fields mutually supplying the necessary energy, so that the energy exchange
between the source and the fields in the circuit is zero at any time and –
correspondingly – the reactive power supplied by the source is also zero.
Although the circuit has reactive elements, it will absorb only active
power from the source. In this case, it is said that resonance phenomena occur
in the circuit
Cuvinte cheie:rezonanţă, frecvenţă, circuit RLC,reactanţe

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C9-REDUCTOR MECANIC ROTATIV

Această intrare a fost publicată în 2025 și etichetată Ioan DRAȘOVEAN la de

Abstract:This work was possible whit the results of engineering studies so far
where we found the solution and its application in a practical situation inherent in
the most diverse sphere of human activities. With the passage of time, even the
most successful and efficient mechanical constructions will be surpassed by the
dynamism of human progress. In this situation, man intervenes whit modern
solutions for modern challenges. In this case we applied practical solution of gear
reduction. We sought to use the existing space left over from the previous version
of the machine builder by combining as much as possible of the reducer elements
without affecting the aesthetic and resistance characteristics of the designed
reducer.
The new reducer makes a speed reduction from 400/RPM to 200/RPM
whit its operation even in overload mode through a correct dimensioning resulting
rom the strength calculation of the gear gears and by assigning a module of 5mm
to the wheels in the cassette.

Keywords: reduction ratio, correction,coverage, module, simulation Solid-
Worcs,RPM valvoline dynamic balancing.

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C8-STUDIU EXPERIMENTAL PRIVIND INFLUENȚAREGIMURILOR DE TRATAMENT TERMIC ASUPRAMICROSTRUCTURII ȘI TENACITĂȚII OȚELULUI C45

Această intrare a fost publicată în 2025 și etichetată Andrea SZOMORU Dan Cristian NOVEANU la de

EXPERIMENTAL STUDY ON THE INFLUENCE OF HEAT
TREATMENT REGIMES ON THE MICROSTRUCTURE AND
TOUGHNESS OF C45 STEEL
The present paper investigates the correlation between the heat
treatment parameters (normalization, quenching in various media,
return), the microstructural evolution and the shock fracture behavior of
C45 grade carbon steel. The study involved the application of heating
cycles at 900oC, followed by cooling in water, oil and air, as well as
successive tempering at 220oC and 600oC. The experimental results
demonstrated a reduced penetration of the quenching of C45 steel into
oil, where a heterogeneous structure of troostite and martensite 43 HRC
was obtained, compared to the fully martensitic structure obtained in
water 58 HRC. The analysis of fibrosity and crystallity of the fracture
surfaces highlighted the transition from brittle cleavage rupture (specific
to the hardened state) to tenacious, fibrous rupture (specific to the
improvement state), reaching a maximum value of KCU resilience of 112
J/cm2 after high recovery. The paper validates the importance of
improvement treatment for machine parts.
Keywords: plain carbon steel, heat treatment, ductility, Rockwell
hardness.
Cuvinte cheie: Oțel carbon C45, tratament termic, ductilitate,
duritate Rockwell.

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C7-SISTEM DE POZIȚIONARE COMPLIANT PENTRUMICROSCOAPELE DE PRECIZIE

Această intrare a fost publicată în 2025 și etichetată Diana Daria SĂLĂJAN Simona NOVEANU la de

COMPLIANT POZITIONING SYSTEM FOR PRECISION
MICROSCOPES
Abstract: This paper presents the design of a compliant positioning
system driven by piezoelectric actuators, integrated into a high-precision
microscope. The paper is organized into seven chapters, with emphasis on the
design of three constructive variants and on the finite element analysis performed
for two different materials. Finally, a prototype was fabricated by 3D printing.
Keywords: compliant mechanisms, precise positioning, piezoelectric
materials, finite element analysis.
Cuvinte cheie: mecanisme compliante, poziționare de precizie,
materiale piezoelectrice, analiză cu element finit.

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C6-PROIECTAREA ȘI PROTOTIPAREA UNUI SISTEMMECATRONIC HIBRID DE POZIȚIONARE DEÎNALTĂ PRECIZIE

Această intrare a fost publicată în 2025 și etichetată Simona NOVEANU Tudor MOLDOVAN la de

DESIGN AND PROTOTYPING OF A HIGH-PRECISION
HYBRID MECHATRONIC POSITIONING SYSTEM
Abstract: This paper presents the design of a hybrid mechatronic
positioning system comprising two functional stages: a coarse
positioning module driven by servomotors and a fine positioning unit
utilizing flexible hinges and piezoelectric actuators. The study is
organized into three chapters covering the mechanical design, numerical
simulation, and prototype development.
Keywords: precise positioning, mechatronic system, compliant
mechanisms, prototyping.
Cuvinte cheie: poziționare de precizie, sistem mecatronic,
mecanisme compliante, prototipare.

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C5-PROTOTIPAREA UNEI FAMILII DE ȘTERGĂTOARE DEPARBRIZ COMPLIANTE

Această intrare a fost publicată în 2025 și etichetată Romica-Alin JUravle Simona NOVEANU la de

A FAMILY OF COMPLIANT WIPERS PROTOTYPING
Abstract: This paper presents various designs for a wiper system
composed of two main modules: one for positioning and the other a
compliant wiper. It introduces three distinct designs for the compliant
wipers, which were subjected to finite element analysis, resulting in
varied outcomes. Additionally, these design variants were fabricated
using 3D printing technology.
Keywords: wiper, compliant mechanisms, finite element analysis
Cuvinte cheie: ștergător de parbriz, mecanisme compliante,
analiză cu element finit.

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C4-STUDIU PRIVIND POSIBILITĂȚILE DE UTILIZARE A TELEDETECȚIEI ÎN AGRICULTURĂ

Această intrare a fost publicată în 2025 și etichetată Alexandru FLONDOR Ferenc GASPAR la de

STUDY ON THE POSSIBILITIES OF USING REMOTE SENSING IN AGRICULTURE
Abstract: The paper presents an analysis of the possibilities of using remote sensing in agriculture, with a focus on the ability of multispectral satellite images to provide essential information on the state of vegetation, crop evolution and the identification of areas affected by biotic or abiotic stress. The main types of sensors and platforms used in modern agriculture, such as Sentinel, Landsat and MODIS, are analyzed, as well as the most frequently applied algorithms, such as NDVI, EVI and NDWI. The study highlights the benefits of remote sensing in optimizing agricultural processes, reducing costs and supporting managerial decisions. By integrating satellite data with GIS and analytical models, agriculture becomes more precise, sustainable and predictive.
Keywords: emote sensing, NDVI, satellite imagery, precision agriculture, vegetation index
Cuvinte cheie: teledetecție, NDVI, imagini satelitare, agricultură de precizie, indice de vegetație

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C3-CONTRIBUȚII PRIVIND DEZVOLTAREA UNUI FRIGIDER INTELIGENT

Această intrare a fost publicată în 2025 și etichetată Andrei-Vlad UJICĂ Ioan Aurel CHERECHEŞ la de

Abstract: The paper presents contributions regarding the design
and development of an intelligent refrigerator capable of automatically
monitoring stored food, controlling operational parameters, and
communicating in real time with the user. The system integrates
temperature, humidity, and presence sensors, a microcontroller-based
control module, and dedicated software for data management. The main
objectives are energy optimization, extended food preservation, and
automated inventory tracking. Experimental results confirm the stability
of the prototype, high measurement accuracy, and its potential
integration into modern IoT ecosystems.
Keywords: smart refrigerator, digital sensors, IoT, automation,
microcontrollers
Cuvinte cheie: frigider inteligent, senzori digitali, IoT,
automatizare, microcontrolere

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C2-CONTRIBUȚII PRIVIND REALIZAREA UNUISISTEM DE AUTOMATIZARE A UNEI CULTURIHIDROPONICE ÎN SPAȚII CONTROLATE

Această intrare a fost publicată în 2025 și etichetată Ioan Aurel CHERECHEŞ Robert NAHARNEAC la de

CONTRIBUTIONS REGARDING THE DEVELOPMENT
OF AN AUTOMATED HYDROPONIC CULTIVATION SYSTEM
IN CONTROLLED ENVIRONMENTS
Abstract: The paper presents the design and implementation of
a fully automated vertical hydroponic system for seedling production in
controlled environments. By integrating an Arduino UNO board with pH,
TDS, temperature, light, and water-level sensors, the system enables
automatic monitoring and regulation of key growth parameters. Its
physical structure includes vertical PVC columns and a recirculation
circuit optimized for efficient use of resources. Experimental results
confirm the system’s stability, reliability, and scalability. The study
highlights the relevance of automation and embedded technologies in
modern agriculture and their potential to sustain productive, low-cost
hydroponic installations.
Keywords: hydroponics, automation, Arduino, sensors,
seedlings, controlled spaces
Cuvinte cheie: hidroponie, automatizare, Arduino, senzori,
răsaduri, spații controlate

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C1-CONTRIBUȚII PRIVIND DEZVOLTAREA UNUISISTEM DE PARCARE INTELIGENT

Această intrare a fost publicată în 2025 și etichetată Călin COMAN Ioan Aurel CHERECHEŞ la de

CONTRIBUTIONS REGARDING THE DEVELOPMENT OF AN
INTELLIGENT PARKING SYSTEM
Abstract: The paper presents the development of an intelligent
parking system designed to optimize the management of parking spaces,
provide real-time availability monitoring, and reduce urban congestion.
The system integrates intelligent hardware modules (ultrasonic sensors,
microcontroller, communication modules) connected through a software
platform capable of collecting, processing, and displaying relevant
information in a user-friendly format. The results demonstrate the
system’s efficiency, its high accuracy in detecting parking space
occupancy, and its scalability for both urban and private applications.
The article details the design methodology, hardware architecture,
functional diagram, and performance evaluation of the prototype.
Keywords: smart parking, ultrasonic sensors, IoT, automation,
microcontrollers, real-time monitoring
Cuvinte cheie: parcări inteligente, senzori ultrasonici, IoT,
automatizare, microcontrolere, monitorizare în timp real

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