Catalin Silviu Nutu

Constanta Maritime University and Mircea cel Batran Naval Academy · Department for General Engineering Sciences

The present article aims to increase knowledge of stopper cylinders with return spring. A stopper cylinder with return spring works in an ambient temperature of between 253.15K and 353.15K. The stopper cylinder used in this article is only a pneumatic actuator. After introduction, the authors analyse two pneumatic circuits using stopper cylinders....

"This paper presents the main complicate science issues man has to solve, but it also presents reasons to explain his present incapacity to solve them. It also shows ways to address more successfully those complicate issues, in order to find their solutions."

" This paper is concerned with the logic of happiness, whereas happiness is most commonly seen by man as a function of fulfilled wishes. It also shows the disastrous consequences for man and his home planet when engaging in this damaging way to search for happiness. This paper also shows that the main reason for consume and overuse of planet’s reso...

"Showing complicate issues in science, like the strange facts and realities pertaining to the quantum world, this paper explains why it is so difficult to understand and to solve those complicate issues. This paper also stresses the important fact, that in order to understand these strange realities pertaining to the quantum phenomena but also in o...

Expanding on the Concept of Quality This paper expands on the concept of quality and links it with the concept of fractal by means of Theory of secrecy, taking into account that the additive model of quality has virtually the same mathematical expression as one of the models presented by C. E. Shannon in his work regarding Theory of secrecy. Based...

Communication with Nature based on a Combined Multiplicative/Additive Encryption Model This paper constructs a model of communication with Nature, but also expands on the concept of fractal and thus continues the work developed in another paper presented within the same Conference. Main idea of this paper is that, if and only if a Golden Number or...

This article represents research regarding use of hydraulic motors. The role of hydraulic motors is to convert fluid pressure into rotary motion. The motor considered in this article is a hydraulic actuator. The hydraulic motor works only with a pump unit. A pump unit usually has a maxim pressure of 6·10 5 Pa. Hydraulic motors can be used for vario...

Fractal shapes can be found everywhere around us in Nature, at small scale microscopic level, at normal scale observable with the naked human eye, but also at very large scale level, when looking at very far distant galaxies. As it will be presented in this paper, there is an inherent relationship between fractal structures in Nature and the harmon...

The paper presents aspects related use of double-acting cylinder. Besides, in the article are presented three hydraulic schemes that double acting cylinder. Meaning, two hydraulic circuits and one electro-hydraulic circuits. First hydraulic schemes has the following devices: fixed displacement pump, air filter, 4/3 way hand lever valve, tanks reser...

This article represents research regarding use of pneumatic linear actuator. A pneumatic linear drive is a device that creates motion in a straight line. The linear drive with solenoid in this manuscript is a pneumatic actuator. The pneumatic linear drive works only with compressed air. Compressed air usually has a pressure of between 2·10 5 Pa and...

This article represents research regarding use of pneumatic double acting cylinder with two in and out piston rods. A cylinder with two in and out piston rods in this paper is a pneumatic actuator. The cylinder with two in and out piston rods works only with compressed air. Besides, the compressed air usually has a pressure of between 2·10 5 Pa and...

Nature has been abused for some considerable time already, and still continues to be abused. Now, nature is fighting us back, increasingly stronger for some time, and it seems clearly that we are going to lose this fight, not only because we are not intelligent enough, but rather because we are also arrogant and greedy. Corona virus pandemic is jus...

Nature is, at its fundamental level, far weirder and harder to understand than originally thought. The book “Links between normal scale and small scale phenomena” is giving some new useful insights and approaches, helpful to better grasp and address quantum phenomena. This book is concerned with the detection of links between normal scale and smal...

The paper is presenting different dynamics of an economic complex system, based on certain assumptions made within each of the presented models in the paper. The assumptions used are allowing estimating and forecasting the evolution of the respective complex economic system. This estimation can be made in the “classical” way, which is to say withou...

This paper analyses data available from the last fifty years, with regard to Earth and it has the purpose to analyze them from both perspectives: the time domain analysis and spectral-domain analysis. Following this analysis, one can conclude about the correlations within the analyzed data or about forecasted future evolution and necessary measures...

The article concerns utilization of linear regression and ANOVA for a set of data. The set of data regards the nonconformant housings of electric motors for different diameters of housings.

The paper refers to defects recorded for asynchronous electrical motors. The aim of the paper is to conclude about the quality of the production process of the asynchronous electrical machines using the statistical process control. The main objective of statistical process control is to find and conclude about the abnormalities in the production pr...

The paper is presenting the situation of successful education mentality one uses in order to understand and to generate science when using such successful education, considerations about the role and profile of the educator but is also dealing with the link between the education and marketing, all these such as seen by the author of the paper. Keyw...

The paper is concerned with the principal component analysis and factor analysis of data for threephase asynchronous electrical machines of 300 W. The observed data are: torque (M), rotation speed (n), voltage (U) and current (I).

The paper is concerned with the principal component analysis and factor analysis of data for three-phase asynchronous electrical machines of 300 W. The observed data which are to be used in both analysis are the measured values of: torque (M), rotation speed (n), voltage (U) and current (I).

After presenting in the Introduction the goals of the paper, in its second section the paper is presenting and summarizing important features and details about the professional engineering software programs such as CAD, CAM, CIM, CFD, their advantages and downsides and how they have been used and have been helpful until now. In the second section o...

The relatively recent term of Workflow Management Technology System implies exactly a system related to the main actions on the available information and actions to take, namely the communication of information and coordination of related actions. Workflow Management Systems are capable to manage and use centralized databases and Database Managemen...

The paper presents the main strength factors stressing the transverse bulkhead of a cargo ship. The transverse bulkhead is one of the main components of the hull for a general cargo vessel. There are presented the role and the importance of the general cargo vessel's type using an original drawing made in NX 8.0 Software from Siemens. Further on, w...

The authors are presenting an analysis of the work deck only for the support vessel, a ship having in its structure among others: deck cranes and helicopter deck. The work deck is one of the most important parts of the support vessel's hull. We are starting the paper by presenting the role and the importance of the support vessel's type, by using a...

This paper is intended to provide a model for the study of the quality of squirrel cage induction motor, based on the Taguchi Method. By measuring the values of the considered quality characteristic - the rated current (IN) as being dependent of the control parameters: rated rotation speed (nN), rated torque (MN), rated phase voltage (UphN), effici...

The paper aims to determine the torsional stress occurring in the rotor's shaft of the three phase asynchronous motors for a given rotational speed of the rotor. The three phase asynchronous motor is started using the main starting variants, each variant having its own torque characteristic which produces a certain maximum shear stress. The model u...

Termenul "calitate" provine din limba latina, unde "qualis" are semnificatia de "fel de a fi". Calitatea se refera la o portiune din realitatea inconjuratoare numita produs (entitate). Pentru aceasta entitate se identifica elemente semnificative, denumite caracteristici. Conceptul de calitate Termenul "calitate" provine din limba latina, unde "qual...

The work is concerned with the methods of the measuring the quality and especially how the decision and game theory can be used in order to reach the goal of measuring quality.