Business Feasibility of Intensive Vaname Shrimp (Litopenaeus vannamei) with Non-Partial System

Shrimp farming with a non-partial harvest system is a cultivation concept to obtain optimal production harvest. The purpose of this study was to determine the business feasibility status of vaname shrimp (L. vannamei) cultivation with a non-partial harvesting system in terms of the ecological and financial aspects from aquaculture. The research method used in this study is a survey research method with data collection techniques based on purposive sampling. The results showed, this non-partial system is ecologically very feasible, because the conditions of the average daily water quality parameter values (DO, pH, temperature, salinity) during the aquaculture period are still above the water quality standard threshold for intensive aquaculture. The business financial feasibility analysis resulted in a profit of IDR 441,307,102,-, BEP Unit 2,062 Kg, BEP Sales IDR 119,995,253,-, R/C of 1.71, Return on Investment of 47.69%, and Payback Period of 2.7 years. Meanwhile based on investment analysis, the Net Present Value of IDR 34,136,139,245,-, Net B/C 11.61, and Internal Rate of Return 37.23%. So, it can be denied, that based on ecological aspects and economic multiplication of aquaculture systems like this can be categorized as very feasible and profitable to be globally developed.

Voltage Stability Analysis of Nigerian 330kV Power Grid using Static P-V Plots

Nigeria power system has been experiencing total or partial system failures in recent times and voltage instability is a strong factor. The paper seeks to perform the voltage stability analysis, based on static P-V plots, on buses located around and within the South East zone of Nigeria. An injection group containing generators to serve as the source and a sink group as loads to be monitored are created. The generators are assumed to be within their min/max MW limits. The load is increased in the sink group as well as in the source group to maintain the same generation/load balance. Load power and bus voltages (P-V) curves are plotted on the load busbars and the first busbar to reach the voltage collapse and MW transfer limit are determined. From the results obtained, at a load of 100 MW, Makurdi bus recorded a voltage of 0.9301 pu which is already below the regulatory standards of ±5% of the nominal line voltage. It entered the region of instability at a load of 245 MW. This created a situation of system instability and a possible partial system collapse. Subsequently, at a load of 260 MW, the system clearly entered unstable region giving rise to partial system collapse of the network.

Comparative analysis of methods for assessing the dynamic properties of a tool as a partial system

The results of studies of the dynamic properties of a turning tool cutter are considered, obtained using experimental modal analysis, in the arsenal of which there are several identification methods. For comparison, the results of four methods are given. Keywords: cutting processing, vibration, tool, dynamic properties, tool holder, experimental modal analysis. [email protected]

THE ESSENCE AND IMPLICATIONS OF INTEGRATED LOCAL DEVELOPMENT PLANNING

Local development planning (i.e. development planning of municipalities and cities) in all countries has always played an important social role. For this reason, in the last couple of decades, this area is regulated by adequate national laws, which differ in many ways due to insufficiently developed scientifically based local development theory. According to this, in the presently constituted first vision of the theory, two local planning systems were identified. The first system with a long tradition is called a partial system since the state with its development interests is exclusively responsible for all local and overall social development in a certain country. The second, new system, is called an integrated system and in it, both state and the most influential social forces, which have fought hard for such a role, participate together as partners. The integrated system has numerous advantages when compared to the partial system of local planning and is therefore, especially in developed countries, the reason for switching from partial to integrated system. This scientific paper has been created to support this, especially because of the insufficiently developed local planning theory, with the goal to contribute to the development of the local integrated development systems and the projection of its general implications on the local government, its nation state as well as the international community. In this paper, adequate research methods, primarily integrated, were used and the obtained results imply that when using this system, positive fundamental social changes are caused, which, especially in the less developed countries, facilitate faster and more efficient catching up with the developed countries.