bluuebunny/crossref_metadata_2025_split huggingface dataset:
Management elements of conception and development of scientific research projects
Authors: Ioana A , Costoiu M , Tufeanu D , Semenescu A , Marcu D 
Published: August 2019

Abstract
The concept of a scientific research project offer must be based on the analysis of the four types of resources: the human resources, the financial resources, the material resources and the informational resources. We note the importance of the human resource quality. In the following figure we present the main elements of the design algorithm of a research project. The feasibility study (otherwise very complex) is of great importance for the success and viability of the project. We have developed the algorithm for designing a scientific research project. Thus, we have devised several items, in a non-fortuitous order: formulation of the theme, resources analysis, feasibility study, offer formulation, project drawing, project implementation, project evaluation, dissemination. We have critically analyzed several definitions of a scientific research project. For example, “a set of investments and other planned activities to achieve specific objectives within a predetermined time frame and budget”, or, “a planned action that is a set of interrelated and coordinated activities to achieve specific objectives within a given budget and a period of determined time”. We also analyze the key functions of a scientific research project: specifying the issue to be addressed, specifying the objectives to be achieved, specifying the activities to be undertaken to achieve the objectives, specifying the revenue (or resources) needed for the deployment activities, identifying and specifying the responsibilities of the different organizations involved in implementation of the project, allowing technical and administrative reviews of the project, the basis for monitoring and evaluating the project that can be done either during the project’s implementation, or after the project has been completed. We have formulated in the article specific concepts on: “a development program is sustainable when it is able to provide an appropriate level of benefits over a longer period of time after the financial, managerial and technical assistance from the external donor ended”, or, “for most projects sustainability is a default, and donors and recipients wait and take responsibility that certain aspects of the activity will continue. Failure to make explicit sustainability as part of the project’s training and implementation process may lead to lack of benefit”.
Friction phenomenon study for chain link – guide contact in translational oscillatory motions
Authors: Lates M T , CGavrila C 
Published: August 2019

Abstract
The fuel consumptions of the automobiles are hardly influenced by the friction between the components of their mechanical transmissions being in relative motion. One of the main parts of the automobiles mechanical transmissions is represented by the chain drive transmission. The frictions inside the chain drive transmissions could be split in: the friction inside the chain, between its components (links, bolts); the friction between the chain links and the sprockets; the friction between the chain links and the active part of the tensioning guide. The aim of the paper is to investigate the friction phenomenon in the chain link – guide contact for a set of normal forces, velocities and temperatures. The tests are achieved for sets of motions frequencies, normal loads and oil bath temperatures; according to these, there are determined the dynamic friction coefficients (during the motions) and the static friction coefficients (at the end parts of the strokes). The results show graphically the variations of the static and dynamic friction coefficients with the motions frequencies, the normal loading forces and the oil bath temperatures. The conclusions are useful in order to identify the functioning cases where the frictional loses are small.
A thermodynamic optimization of a gas turbine cycle with a supplementary regenerator
Authors: Memet F , Faitar C 
Published: August 2019

Abstract
International concern regarding pollution related to maritime transport sector and energy efficiency desiderate have determined specialists to search for more suitable alternatives to internal combustion engines. Due to their advantages, gas turbine systems are met in different marine propulsion applications, such as passenger ships or military vessels. Gas turbines will be even more intensively used in the future, an outcome of this reality being the need of their performance increment. A direction to be followed, considered in this study, is the combination between the improvement of the gas turbine efficiency by including a regenerator in the layout of the plant and, also, the rise of the temperature at the inlet of the turbine (TIT). Will be considered an open cycle gas turbine. The thermodynamic analysis is about the assessment of different influences such as: regenerative effectiveness versus the heat added in the combustor, regenerative effectiveness versus the work consumed by the compressor, regenerative effectiveness versus the thermal efficiency, regenerative effectiveness versus the specific fuel consumption, temperature at inlet of the turbine (TIT) versus the thermal efficiency. The results obtained will indicate the fact that both actions will lead to a gain in the performance of this technology.
Automation of the lamination process for automotive applications
Authors: Popa L , Popa V 
Published: August 2019

Abstract
The article addresses the design of an automation system for the lamination process of the cars, which has as inputs different types of transducers, and as outputs the command of a linear pneumatic motor. The layered and self-supporting laminated structures of motor vehicles are manufactured from a thermoplastic substrate and a flexible sheet material in one direction rolling and cutting operation. The installation for producing these laminates is a casting press having two casting plates, each of which comprises a component of a pair of cutting means. It is used a CPU 315-2 PN / DP, which is a medium-sized program memory processor and it is often used in automation structures. This processor can also be used as distributed intelligence (master or slave). The implementation of the code sequence to work on this processor is done in one of the specific languages to the programmable machines. The software used in programming is STEP 7. The stored information is not erased when the processor is disconnected. The usefulness of programmable machines has simplified the approach of an automated system.
Study of dimensional changes during washing process for 1:1 interlock cotton yarns
Authors: Szabo M , Babanatis-Merce R M , Barbu I , Babanatsas T , Jitaru L 
Published: August 2019

Abstract
The paper proposes a study regarding the dimensional changes during washing process for the 1:1 interlock structures made of 100% cotton yarn with Nm 58/1. The interlock 1:1 structures which are studied are made of 100% cotton yarns, with Z torsion, on Monarch circular knitting machines, with diameter of 30 inch, fineness 20E and 72 knitting systems. Tubular meterage knitwear resulted from this process. After the knitting, the structures were laid for relaxation, and then they were subjected to the washing, drying and relaxation operation. The loosening of the knits for 72 hours was done in air-conditioned areas respecting the parameters of the standard atmosphere to balance the internal tensions introduced into the structures during the knitting and washing operations. The structure parameters of the knitwear modify after the relaxation before finishing process, after finishing and after washing process. The machines where the structures were produced are new generation knitting machines and finishing. After knitting and relaxation of the fabrics, the finishing and washing processes were applied with a minimum tension of the structures, de-watering was made with uniform pressure air-blowing installations on entire length and surface of the tubular knitting, in this way replacing the classical centrifugation machines, which had a dynamic action on knitwear and increased the wrinkling.
The universities’ contribution to economic prosperity through technology transfer
Authors: Taousanidis N , Taousanidis A 
Published: August 2019

Abstract
Our economy is a knowledge-based economy an economy founded on the production, distribution and use of knowledge. Thus a connection of main economic actors (firms) to main knowledge producers (universities) is necessary. The process of technology transfer from universities to market is however not simple and consumes resources and infrastructure. European universities face this challenge in a way not similar to the American ones, looking for great revenues, strengthening of basic research and local growth. The latter is analysed in this work and proposals are made to universities, to match society’s expectations without jeopardizing their core mission, education and research.
Method for avoiding cracks during drying of masonry units made of illite raw material
Authors: Vasic M , Radojevic Z 
Published: August 2019

Abstract
Drying is one of the most important steps in the production process of masonry units. In order to prevent the formation of cracks during drying information’s about the moisture migration rate variability as well as the material strength variability through drying are necessary. The main goal of this paper was to find a solution how to prevent the crack formation at the beginning (during the first hour) of the drying for the drying sensitive illite raw material. The first step was to record a series of isothermal Deff – MR curves at different drying air temperatures and constant drying air velocity and humidity. As it was already reported all moisture transport mechanisms during isothermal drying are visible on those curves. Characteristic spots registered on these curves were then transposed on the experimentally registered figure material strength us moisture content. It was found that the material strength for the cracked masonry units at the beginning of drying was around 0.09 MPa and that the time of cracking was near the characteristic spot B. Registered material strength and the crack time position (spot B) has additionally confirmed that the drying sensitivity of the raw material are obviously related with the present clay mineral constituents structure and the initial moisture content of the green heavy clay units. Using the Deff values registered for each experiment in the spot B we were able to calculate the maximal moisture transport rate and consequently the proper drying air parameters which are safe and which will not initialize the formation of the cracks at the beginning of the drying.
On a small size floating dock structural analysis in oblique design waves by 3D-FEM approach
Authors: Burlacu E , Domnisoru L 
Published: August 2019

Abstract
In this study we have enhanced the structural assessment analysis of a river-shipyard small size floating dock, with length overall of 60 m, for equivalent quasi-static oblique design wave conditions. The small size floating dock hull has two constructive layouts for the water ballast side tanks. The oblique design wave heading angle is in the range of 0 to 360 deg. The floating dock equilibrium in oblique equivalent design waves is achieved by own non-linear three parameters iterative program. The numerical analyses are done on full extended 3D-FEM structural models, from side to side and from stern to bow, of the small size floating dock, with specific boundary conditions for global and local strength computations. The modelling of the external oblique equivalent design wave pressure has requested to develop specialized user functions into FEM code. There are considered several loading scenarios of the small size floating dock, according to the shipbuilding classification societies. The structural assessment is based on three criteria: yielding stress, buckling and freeboard limit values. The numerical results of the structural assessment for the small size floating dock in oblique equivalent design waves made possible to establish the wave design height limits, according to the safety criteria restrictions.
The structural evaluation of a large floating dock in head design waves by strength criteria
Authors: Burlacu E , Domnisoru L 
Published: August 2019

Abstract
This study is developed for the strength analysis of a large floating dock, with length over all of 209.2 m, obtained from a conversion of an off-shore barge. The docking operations are evaluated by global and local strength criteria. The first operation scenario includes an entire translation process of a ship from the quay to the floating dock railway system, in a river shipyard location, including the main intermediate steps. A second set of operation scenarios include several trial docking cases, at full capacity, considering also the initial state without docking ship that is specific for transit condition between ports. The structural numerical analysis is developed on a very large 3D-FEM model, one sided, full extended over the length, involving an own iterative algorithm for the dock and head design wave equilibrium parameters computation and user functions for the quasi-static head wave pressure application on the external dock shell. The large floating dock has operations in sheltered and unsheltered environments and can be relocated on river and costal waterways, under specific wave’s conditions, according to the shipbuilding classification societies design rules. The numerical results are making possible to evaluate the several operations of the large floating dock by strength criteria.
Numerical study of a container ship model for the uncoupled parametric rolling
Authors: Deleanu D , Dumitrache C L 
Published: August 2019

Abstract
Parametric roll on ships is a resonance phenomenon whose onset causes heavy roll oscillations leading to dangerous situations for the ship, the cargo and the crew. It affects both small vessels with marginal stability and large container ships if four conditions are met simultaneously: the wave length and ship length are approximately equal, the frequency of encounter wave is twice the roll natural frequency, the ship’s roll damping is low enough and the wave height exceeds a limit value characteristic to each vessel. For a container ship, the first two conditions result in a time-varying geometry of the submerged hull and thus to a periodic variation of the transverse stability. In the last two decades, several mathematical models for parametric rolling have been proposed by scientists. In the paper, we cancelled the couplings terms between heave, pitch and roll in a 3 DOF model proposed by Neves and Rodriguez to obtain an uncoupled 1 DOF model for the parametric roll. Even if it seems too simplistic, such a model based on Mathieu type equation is a good start to capture the basic features of the analysed phenomenon. There are no less than seven parameters that can influence the ship stability and the appearance of large roll amplitudes. By modifying two of these parameters one by one and keeping the others constant, a series of colour plots have been drown that capture the role played by the ship’s parameters in obtaining dangerous roll amplitudes or too short times to take countermeasures. Analysing the instability regions suggested by these colour plots, one can imagine control measures to reduce the roll amplitudes, such as changing the forward velocity or the heading angle. The data used in the paper have been obtained from experiments with a container ship model in a towing tank followed by expansion to a full scale ship.
Fluid Structure Interaction (FSI) analysis on ballast tank in-line ejector
Authors: Dumitrache C L , Deleanu D 
Published: August 2019

Abstract
Ejectors are common devices on board liquid carrier vessels and meet on both cargo and ballast tanks. The “in-line” ejector presented in this paper is an original model that was designed with NX Siemens, using information and technical data from a worldwide supplier of high quality marine products. This paper presents a static analysis of fluid’ influence which passing through an ejector on its metal structure using Ansys. From a previous work we took into account the data obtained with CFD (computer fluid dynamic) analysis. The pressure and fluid temperature fields were imported and applied to the meshed ejector model with finite elements, obtaining data on deformations and equivalent stresses and elastic strain.
The vehicle movement using computational fluid dynamics method
Authors: Nedelcu A-T , Faitar C , Stan L , Buzbuchi N , Dumitrache L M 
Published: August 2019

Abstract
Underwater vehicles represent underwater robots able to perform tasks without or with a minimum human intervention. Research and development of this vehicles have growing as a result of excellent characteristics operated in different situation. Before discussing the steady motion of underwater vehicle, it is necessary to examine the hydrometeorological condition founded in respectively area. Interaction between the water surface and the atmosphere determine the development and appearance of hydrodynamic processes. The main current encountered in Black Sea Basin moves in a cyclonic direction to the edge of the continental platform and surrounds the entire basin. Using the data in-situ regarding the influence of marine current for different steps of depths, the underwater vehicle reacts different and have to change his input data to follow the right course. This paper provides an intuitive modeling and simulation approach to obtain a distribution of current influence along the underwater vehicle body. The software SolidWorks and Ansys Fluent are used to realize the vehicle design and the simulation. The Ansys software is a powerful tool used for solving problems involving fluid mechanis. The condition imposed for simulation, was generated and determinate in-situ by Current Meter Model 106.
Numerical investigation on fast displacement ship hydrodynamics
Authors: Pacuraru S , Pacuraru F , Presura A 
Published: August 2019

Abstract
In last decade, sustained efforts have been made to improve ship energy efficiency, to reduce fuel consumption and carbon dioxide emissions by means of optimizing the hull forms and propulsion system. The aim of the present paper is to search for solutions to improve the fast-displacement hull forms of passenger ships that navigate on the Danube river and the Black Sea coast, leading to high energy efficiency, reduced emissions and minimised shore-side effects. To investigate the flow around a 31 m fast-displacement monohull passenger ship, a series of 5 numerical simulations for a range of speeds between 4.5 and 12.5 m/s were performed in order to estimate the forces acting on the ship, but also to analyse the hydrodynamic parameters of the flow. Based on the first series of calculation, several solutions to improve the hydrodynamic performance of the hull are considered. The two most effective solutions found have been the trim edge and the interceptor. Different configurations and angles have been systematically investigated in order to find the most efficient geometrical parameters. Finally, the hull with trim wedge leads to a reduction of the power consumption by 2.4 to 5.5% and the interceptor by 2.8 to 8.8%, for speeds higher than 8.4 m/s. For speeds lower than 8.4 m/s the power consumption is higher than bare hull. Moreover, the solutions proposed are easy to implement for new built ships, but also for ships in operation.
Application of coagulant obtained through charge reversal of sawdust-derived cellulose nanocrystals in the enhancement of water turbidity removal
Authors: Nkalane Aphiwe , Oyewo Opeyemi A , Leswifi Taile , Onyango Maurice S 
Published: August 2019

Abstract
Sawdust-derived cellulose nanocrystals (CNC) were functionalized using hexadecyltrimethylammonium bromide (HDTMA-Br) as a cationic surfactant to produce novel coagulant for application in reducing water turbidity. The modified CNC was characterized using Fourier transform infra-red spectroscopy, x-ray diffraction, scanning electron microscopy, transmission electron microscopy and zetametry. Upon functionalization, the surface charge was reversed from −39 mV to +22 mV by introducing amine group to the CNC matrix. The microscopic analyses revealed that CNC has a narrow particle size range and rod-like morphology. The XRD analysis showed increased peak intensity upon modification, indicating enhanced crystallinity of the CNC; and an additional peak around 30.1° appeared, which was attributed to the presence of HDTMA on the surface of CNC. Turbidity tests was conducted using both simulated and environmental water samples, and the effects of CNC modification reaction time, solution pH, coagulant dosage and initial turbidity levels were evaluated. Results reveal that turbidity reduction increased with an increase in reaction time and coagulant dosage, and decreases in initial turbidity level and solution pH. The performance of the modified CNC coagulant in turbidity reduction complied with the South African national standard (SANS 241:2015) for drinking water quality.
CasPDB: an integrated and annotated database for Cas proteins from bacteria and archaea
Authors: Tang Zhongjie , Chen ShaoQi , Chen Ang , He Bifang , Zhou Yuwei , Chai Guoshi , Guo FengBiao , Huang Jian 
Published: August 2019

Abstract
Clustered regularly interspaced short palindromic repeats (CRISPR) and associated proteins (Cas) constitute CRISPR–Cas systems, which are antiphage immune systems present in numerous bacterial and most archaeal species. In recent years, CRISPR–Cas systems have been developed into reliable and powerful genome editing tools. Nevertheless, finding similar or better tools from bacteria or archaea remains crucial. This requires the exploration of different CRISPR systems, identification and characterization new Cas proteins. Archives tailored for Cas proteins are urgently needed and necessitate the prediction and grouping of Cas proteins into an information center with all available experimental evidence. Here, we constructed Cas Protein Data Bank (CasPDB), an integrated and annotated online database for Cas proteins from bacteria and archaea. The CasPDB database contains 287 reviewed Cas proteins, 257 745 putative Cas proteins and 3593 Cas operons from 32 023 bacteria species and 1802 archaea species. The database can be freely browsed and searched. The CasPDB web interface also represents all the 3593 putative Cas operons and its components. Among these operons, 328 are members of the type II CRISPR–Cas system.