European Space Policy (ESP) in May 2007 put as priority the need to improve coordination and synergies between defence and civilian space programmes and technologies, in a user-driven approach and to set up a structured dialogue with all... more
European Space Policy (ESP) in May 2007 put as priority the need to improve coordination and synergies between defence and civilian space programmes and technologies, in a user-driven approach and to set up a structured dialogue with all actors involved.Has the responsible for the ESDP body the necessary means to address these challenges?
Port State Control (PSC) mulai terbentuk karena timbul kesadaran dari suatu negara untuk melindungi daerah dari negara tersebut, khususnya sektor maritim dari pencemaran lingkungan yang diakibatkan oleh kapal-kapal lokal maupun... more
Port State Control (PSC) mulai terbentuk karena timbul kesadaran dari suatu negara untuk melindungi daerah dari negara tersebut, khususnya sektor maritim dari pencemaran lingkungan yang diakibatkan oleh kapal-kapal lokal maupun kapal-kapal asing yang datang ke negara tersebut.Hal tersebut dilatar belakangi karena banyaknya kegagalan tugas yang dilakukan oleh Flag State untuk selalu mengawasi dan menjamin kelaiklautan kapal yang berbendera negara tersebut.
The aim of this paper is to track a Global Maximum Power Point under Partial Shading Condition from the PV array using Artificial Intelligent (AI) Techniques. Partial Shading Condition is one of the important problems to get Maximum Power... more
The aim of this paper is to track a Global Maximum Power Point under Partial Shading Condition from the PV array using Artificial Intelligent (AI) Techniques. Partial Shading Condition is one of the important problems to get Maximum Power from PV array. Partial Shading Condition (PSC) might be anything in the nature such as clouds, leaves, electric poles and the shadow of buildings which shades falls on the PV module. If some part of a PV module is shaded, then the cells in the shaded region cannot produce as much current as un-shaded cells. The main objective of this paper is to track the Maximum Power from PV cell through AI techniques during (PSC). This paper implements an Clustered Gravitational Search Algorithm to solve MPP tracking problem. The simulation study is carried out on three different patterns with different number of peaks. Simulation results have confirmed that the CGSA gives better quality solution than other algorithm in the literature.
There are various types of Multilevel Converters (MCs) in addition to various types of modulation techniques for these types of MCs; the challenges in selecting the best one of them with regard to the amount of the required of components,... more
There are various types of Multilevel Converters (MCs) in addition to various types of modulation techniques for these types of MCs; the challenges in selecting the best one of them with regard to the amount of the required of components, and its harmonics content. So, a comparison study among these types has been done in this paper. For comparison study, the simulation of seven level of two popular topologies of MCs: Neutral Point Clamped (NPC) converter, and Cascaded-MCs were carried out with Matlab/Simulink software program. These converters are used to drive a single phase capacitor start motor drive. Multicarrier modulation control techniques are used for controlling the MCs; these techniques involve two main type: Level Shifted Carrier (LSC), and Phase Shifted Carrier (PSC). The comparison is made with respect to the performance factors as, the amplitude of the Total Harmonic Distortion (THD), and the DC-bus utilization performance which measured by Root Mean Square of the output voltage Vrms at variable modulation indices and variable carrier frequency. Based on simulation results it's found, that the cascaded-MC with PSC modulation method gives best results, in addition to the Alternative Phase Opposition Disposition APOD-LSC modulation technique (with even number of modulation frequency) generate the output voltage with a lower harmonic content compared with the other techniques.
