This paper presents the contribution of the authors regarding the friction drag calculation of a ship’s hull using the quasi-plane model. The velocity calculation by a dimensional model helps to determine the friction tangential effort. Then, by integration, can be determined the friction drag of a rectangular plane panel. By extension over all the plane plates which compose the ship’s side, results the friction drag for entire ship’s side.

This paper addresses the possibility of making a communication between a PC and a PIC18F4550 microcontroller through the USB port type, in order to achieve industrial automation. In order to prove the communication, it will be made a software in Visual Basic v.6 environment that will exchange information with the PIC18F4550 microcontroller.

This paper presents a theoretical model for calculating the elastic bars subjected to bending plane, with application to gear the shaking Braud grape harvesters. Based on this model we can determine the deformation of the bars with the elliptic integrals.

In recent years, several studies about factors influencing the heat transfer in single-leaf walls composed by lightweight ceramic bricks of large format have been made, in order to reduce energy losses. Separate works have highlighted the relevance of some parts composing the wall such as the different types of internal voids in the brick, different types of tongue and groove system and different types of horizontal joint. This paper seeks to integrate these studies in order to give an overview of factors that influence the heat transfer and study the importance of each one of them, from an energy point of view. For this purpose, the influence of every factor in the equivalent thermal transmittance of the external walls of building is compared. It is remarkable that a single-leaf wall built with a geometrically optimized brick and thin horizontal joint gives masonry wall many significant advantages, because the amount of heat flux dissipated through the horizontal mortar joint is greatly reduced. Better insulated walls mean that there is less need to use home heating and cooling systems. This means less energy consumption and a proportional decrease in GHG emissions, in line with the objectives for 2020 set in the EEP.

The inclusion of disabled young people in the economic and social life is a transversal objective in all the policies and programmes of the European Community. One way to overcome their handicap is to correct or diminish the physical deficiencies that prevent them from being hired in industrial settings. In most of the cases, mild physical disabilities are easily correctable in terms of regular school activities, if discovered before the modification of the tissue structure. This study presents an exploratory analysis that might help to design the ergonomics of the working areas in which disabled young people could be involved.

The paper is concentrated on some micro-structural issues concerning the intimate behaviour of materials subjected to fatigue cycles. A manganese compounds diffusion process has been revealed. This diffusion process, as a consequence of the intimate behaviour an aluminium alloy subjected to fatigue, has been then analysed using a physical model for which the local temperatures have an essential role.

The paper presents the sonic treatment effect on the microbiological indicators of the raw water, namely total germ number, Streptococci number, total coli forms and fecal coli forms. Also, the paper comprises the sonic installation which includes the vertical reactor and the air-jet ultrasound generator. The results allow the development of a new raw water treatment technology that will eliminate the actually two-stage treatment - filtration and chlorination, for the drinking water plants.

The work in seismic design of bridges is needed to develop physical models and mathematical theory, based on which will be assessed and quantified the dynamic response of bridge structures subjected to stress arising from road traffic or seismic activity. The need for this modeling is imposed three requirements: to ensure the structural integrity of the bridge elements for subjected impulsive, proper choice of dynamic insulation elements placed as a interface between the superstructure and infrastructure, as well as analysis of effects on joints in these situations demand. This paper proposes a physical model of a general nature, enabling customization depending on the specific constructive bridge, or the way it is solicited. Customize this model was developed for this study based on the existing viaduct Transylvania highway located between km 29 +602.75 and km 29 +801.25.

The Marine Warranty Surveyor’s role is to facilitate, by technical examination, the continuation of insurance cover during those periods of a marine related activity when Class is not involved or Class is suspended. This allows for seamless insurance cover throughout the construction phase covering operations which may result in claims that exceed the deductible, either individually or cumulatively.

Brazing is realized by joining the added material to the base material thus it is realised a solid joint between materials. The degree of dissolution of materials used in assembly is very important in realization of sustainable bimetallic joints that can be stamped successfully. The stamping creates areas where joints can give the size and material compression degrees because its variation. A better stamping of these bimetallic brazed plates can be obtained through the exactly determination of these material areas.

Palm kernel shells were assessed as aggregate in concrete and laterite blocks. Results showed that laterite blocks reinforced with kernel shells at the optimum proportion of 1:4 (kernel shells:laterite) by volume were about 15% stronger than plain laterite blocks. The strength of laterite blocks reinforced with kernel shells also compared favorably with strength of sandcrete blocks which are popularly used as partitions in buildings. However, replacement of crushed stone aggregate with kernel shells in concrete blocks resulted in a strength reduction of about 50%. Therefore, palm kernel shells are not good substitutes for crushed stone aggregates in concrete.

This study shows the benefits of the modern methods application of the predictive maintenance in order to detect and diagnosis of rolling bearings wear. From the large amount of domains where predictive maintenance has been applied, there have been chosen to be case studied the equipment which have rolling bearings as components. Rolling bearings are predisposed to a premature wear because of the execution and mounting quality, of the very numerous cycles of operation, of loading conditions during the production operation, or of the improper lubrication, etc.. By applying modern wear detection methods of rolling bearings, the causes of producing it can be identified and all of them could be set aside in order to get an increasing lifetime of rolling bearings and of the process equipment.

This paper follows the study of bit error rate evolution in a mobile communications system using DS – CDMA (Direct Sequence – Code Division Multiple Access) technology. We have assessed the bit error rate (BER) based on the signal/noise ratio, Eb/N0, and the number of users in the system. For this purpose, we have used M sequence and Orthogonal Gold sequence and the AWGN (Additive white Gaussian noise) transmission medium.

In this paper are presented some aspects related to recycling of material recovered from the waste fibrous filter composites, when obtaining some board grades with technical applications. Based on obtained results can be appreciated that the fibrous material from the waste filtering composites can be recovered in certain proportions to obtain of gypsum board grade used in building industry. It is emphasized that the quantity of fibrous material from waste filtering composites can be increased above 25%, maintaining of the same level of strength characteristics, both by utilization of dry strength agent and some quantity of virgin fibers (unbleached Kraft softwood pulp, TMP, pulp, etc.).

This paper aims to study the relations between some variables involved in professional success. The coverage is one of great concern to not only specialists in different fields (e.g. management, psychology), but also to the individuals themselves. We have chosen as determinants of a successful career: global aspects of personality and proactive personality. This paper is a comparative study between a group of 120 subjects including 18 engineers in the petrochemical industry, 28 chemical engineers, 14 engineers from textiles industry and a group of 60 students from Transilvania University of Brasov.

This paperwork presents the most frequent applications of the hydrostatic drives on heavy machine-tools and tries to modularize them. The focus is on CNC heavy machine-tools that have been manufactured after year 2000. Hydraulic drives are used for heavy duty machine-tools when a high power density is required, especially for the auxiliary kinematic chains: locking, toolholder or workpiece clamping/unclamping, balancing of vertically moving loads, compensation of geometric errors etc.

The main purpose of this article is to describe the principles of CO ventilation in car parks and to provide a brief description of smoke extraction and control system. It provides information on the possibilities provided by jet ventilation. In closed car park, in Romania, we use for CO and smoke extraction system fans and a lot of ducts. In many country of the Europe, they use for this jet ventilation system, without ducts, characterized by low installation and energy costs.

The purpose of the paper is to visualise the vortex shedding process behind a bluff body. It was considered a plane flow of a viscous fluid (water) around a T profile having the geometric sizes modified. It was measured the fluid flow speed in the section of the measurements and the frequency of the vortex detachment from the profile. The vortex development phenomenon depends by the profile’s geometry and the Reynolds number of the flow. The relation between Reynolds number and Strouhal number was obtained for different sizes T profiles. The experimental study is necessary to improve the vortex flowmeter performances.

The concept of corporate governance appeared on the background of financial combinations atypical for market economy, in which well-known companies have been involved, some of them resulting in financial scandals which have been spread around the world. It is the case of companies with notoriety as ENRON, PARMALAT, BARING, ANDERSEN and others, which the public has known initially in terms of economic development and subsequently as examples of disastrous failures due to the ignorance of management risks, managers’ greed, the lack of professionalism of external auditors etc. I have made a brief presentation of the concept of corporate governance seen from several points of view, the need for governance, its evolution in international organizations and the types of models encountered in practice.

The purpose of this paper is to present a CAD study for generating of 3D shapes with superellipsoids, supertoroids, super cylinders and super cones based on computational geometry. To obtain the relevant geometric information concerning the shape and profile for different 3D objects the Madsie Freestyle 1.5.3 application was used. Results from this study are applied in geometric constructions and computer aided design used in engineering and sculpture design.