Journal of Marine Technology and Environment 2018 Vol. 1

The present paper analyses the environmental performance of short sea shipping in terms of greenhouse gas emissions and its impact on the strategic development of shipping companies. The legal framework and policy issues at EU and international level are studied. A framework of parameters is developed for analysis of energy efficiency and CO2 efficiency of short sea shipping. A conceptual model is proposed for evaluation of the environmental performance of short sea shipping based on а developed system of performance indicators. The proposed conceptual model serves as a basis for quantification of the environmental impact of shipping activities of the company and strategic decision-making as concerns investment in technologies, new-buildings and services restructuring for enhancement of environmental performance.

By introducing international standards and local rules and Normalization was a lavish a production version based machines Field organs, thus creating interchangeability -the opportunity Machines bodies, with huge implications for maintenance and machine reliability. Technological evolution implies a great flexibility of production capabilities with strong influences on changing design concepts. The emergence of personal computers is also favored by a tendency to globalize design rules through specialized design programs. The overall picture of design processes is changing very quickly and is determined by the emergence of modern means that designers have at their disposal today. Computer problem solving has been a strong motivation, so that later hardware development and PC development have led to the emergence of software dedicated to mathematical problems. For over 20 years, Mathcad is the recognized standard in designing, documenting and collaborating with computers, calculation methods and algorithms in design. This paper proposes the design of the gear unit for a single speed gear using the mathcad program.

Energy Efficiency Design Index (EEDI) was introduced since 2013 for new ships as a measure to improve energy efficiency of sea going ships. This factor already has created a great influence on global maritime industry. However, any requirement related to the energy efficiency of inland vessels does not exist. This paper attempts to evaluate EEDI for inland oil tankers of Bangladesh. According to the results of this analysis, which has been based on 90 existing inland oil tankers, EEDI that was introduced for seagoing ships cannot be applied B for proper evaluation of inland oil tankers due to limitation of carrying capacity and installed main engine power. So, the main objective of this paper is to provide EEDI reference line for inland oil tankers of Bangladesh.

Simulation of processes in a wastewater treatment plant is very effective because it reduces operational times, reduces costs for the preparation of uninitiated human resources in the field and also reduces utilities consumption. This can be done using many specialized programs. The purpose of this work is to present such a simulation using the GPS program-X-Hydromantis.

This paper aims to analyze and evaluate studies on port security, which is an increasing concern, and summarize them to put them in order. It was obviously seen with the 9/11 terrorist attacks that terrorists also have suicide capabilities to maritime targets. Consequently, International Ship and Port Security (ISPS) Code came into force by International Maritime Organization (IMO) in 2004. In this paper, port security, as one of the main subjects of ISPS Code with the ship security, is analyzed. Therefore, Dokuz Eylul University Online Library is searched with some constraints which includes “port+security” in title and all articles should have “full text” and “academic journals” status. Searching was completed with 145 articles and 58 of them were analyzed. Articles were categorized under such four different subtitles as “importance of security”, “economic, financial and legal dimensions of security”, “security threatening elements”, and “technological advances in security”. It can be said that studies on port security mainly focused on the ISPS Code. However, the great majority of the studies have been addressed to port security and the ISPS Code in the same manner. In order to ensure port security, it is necessary to concentrate on those studies that will centre on different aspects of port security.

A career on board the ships as engineers is an interesting option for young people graduating high schools in Constanta county and not only. Thermodynamics plays a vital role in the academic life of future marine engineers. This is why physics professors and Thermodynamic lecturers from “Gheorghe Duca” Technological High School and Constanta Maritime University decided to test the level of retention of perquisites in Thermodynamics, with focus on internal combustion engines (ICE). A group of 30students from “Gheorghe Duca” Technological High School have been tested in order to quantify the gained knowledge on ICE. They have been selected from the last year of study, they being interested in maritime jobs. The testing was based on a questionnaire containing theoretical and calculus aspects. The time of solving was established at 50 minutes. The results showed that our future graduates (and potential future maritime professionals) proved a good knowledge retention. Also the analysis of the questionnaire results is able to provide to the CMU lecturer a profile of its potential students. In the same time, he can improve his activities during classes, in order to achieve the right level of knowledge requirement.

This study presents our results concerning the geographical distribution, ecological and anthropic impact aspects of the wild flora from three protected areas (Fantanița Murfatlar, Gura Dobrogei and Hagieni forest). All three nature reserves studied belong to the Natura 2000 European network protection. From this point of view we watched the current state and future premises on the maintenance of vulnerable species / endangered in the natural habitats. The study is based on monitoring for 3 years (January 2015-December 2017), in which we identified: main plant families, distribution of species in geoelements and analysis of ecological categories (moisture factors, temperature and soil reaction). For a better tracking of the similarities between species in three distinct areas, we used the statistical method of processing data. The results showing important similarities between the three types of protected areas with respect to the balance of positive and negative effects using Pearce coefficient and respectively with respect to structure and function of natural biota.

The inability to predict the evolution of population dynamics in the presence of chaos can lead to catastrophic situations so chaos-control techniques must be applied to direct the system towards a predictable behaviour. This can be done either by controlling chaos, so the system’s final state is an unstable periodic orbit embedded in the strange attractor of the original system, or by suppressing chaos and producing a controlled regular state of an auxiliary system. A simple and efficient algorithm that suppress chaos by adding constant and periodic pulses to the dynamic system variables has been proposed by Guemez and Mathias. The pulses are introduced into the system either in multiplicative or additive ways. The performance of the method depends critically on the period and the strength of the feedback. With the aim of proving the merits of the method and providing multiple numerical evidences concerning the ability of the approach to change the chaotic state into a periodic one, in the paper we analysed a discrete-time two species food chain model having a rich spectrum of dynamical behaviours including chaos. Because the system parameters were chosen so the system behaves chaotic but close enough to a period-6 window in the bifurcation diagram, we concentrated mainly in stabilizing orbits having periods multiple of six. However, other cases were also considered. The influence of feedback strengths on the stabilization process was highlighted by computing and drawing colour maps presenting the period of the stabilized orbits. They show that even small interventions on system variables can direct the system to the desired goal.

This work presents a review of hydrological data known as water levels and volume flows that have been recorded and then processed to render a contour about the hydrological situation of the Danube River near Tulcea. Onsite measurements have generated daily data on river flows and levels over a 3-year period (2003, 2004, 2006), their interpretation being important for knowing the water drainage regime. Moreover, the characteristic values can have a practical interest in some river design works, such as hydrotechnical flood defense constructions that may occur as a result of elevated levels above a certain threshold or may be beneficial during works or exploitation of river bed resources. In order to accurately present the importance of knowing the river level variation, it is necessary to process, verify and interpret all data on the levels and flows, establish links and graphical correlations, and determine the characteristic values over the multiannual period. The results obtained from the measurements are described in the four periods of the year, and the conclusion shows that each period is manifested both in climatic and hydrological terms by specific characteristics and phenomena.