Compensation of Voltage Sag and Swell Using SMES Based Dynamic Voltage Restorer

 Conducting Magnetic Energy Storage (SMES) is portrayed by profoundly proficient vitality storage. It has fast reaction and power controllability and is relied upon to add to brilliant intensity of the power grid. SMES innovation can possibly bring genuine power storage trademark and furthermore high power and vitality thickness for momentary reaction. This normal for SMES used to shield buyers from the network voltage variances like sag, swell and interference. This paper examinations the activity guideline of the SMES based DVR and its structure depends on basic PI control technique to repay voltage droops, swell and intrusion. Utilizing MATLAB/SIMULINK, the models of the SMES based DVR is set up, and the re-enactment tests are performed to assess the grid disturbances

Compensation of Voltage Sag and Swell Using SMES Based Dynamic Voltage Restorer

 Conducting Magnetic Energy Storage (SMES) is portrayed by profoundly proficient vitality storage. It has fast reaction and power controllability and is relied upon to add to brilliant intensity of the power grid. SMES innovation can possibly bring genuine power storage trademark and furthermore high power and vitality thickness for momentary reaction. This normal for SMES used to shield buyers from the network voltage variances like sag, swell and interference. This paper examinations the activity guideline of the SMES based DVR and its structure depends on basic PI control technique to repay voltage droops, swell and intrusion. Utilizing MATLAB/SIMULINK, the models of the SMES based DVR is set up, and the re-enactment tests are performed to assess the grid disturbances

Striding towards self sustainability using Aluminium from Tanzanian kaolin for combination Tanning system

Content: Sustainability is a key factor which control future leather manufacture. Developing several new technologies is one of the primary agenda for sustainability. However, developing countries are facing several challenges which not only limited to best practice technologies but also finding self sustainability in maximizing the available resources. In the present study, an attempt has been made to explore the potential resource of aluminium from kaolin of Pugu hills, Tanzania for combination tanning. Though, extraction of aluminium from several resources are available, there is limited literature pertaining to Tanzania resources. Moreover, the extracted aluminium is basified and studied for its tanning efficiency. Diffraction and vibrational spectroscopic studies were carried out to assess the confirmation of extracted aluminium. Combination tanning has been carried out with vegetable tannins and dialdehyde starch tanning chemicals, which are from natural resources. Leathers tanned with aluminum and wattle resulted with a shrinkage temperature of 118ºC as compared to Al-Dialdehyde starch leathers showed around 90-100ºC. Physical strength characteristics such as tensile, tear and grain crack strength met the standard norms. Grain surface of leathers are found to be smooth which has been confirmed through microscopic studies. The study provides a new insight on accomplishing self sustainability through available resources and manufacture of eco-friendly system. Take-Away: 1. Tanzania is endowed with massive kaolin rich in aluminium, which is potential for application in leather industry for sustainable development of leather industry 2. The combination tanning system using aluminium from Tanzania kaolin with wattle tannins or Dialdehyde starch imparts leather with both physical and organoleptic properties that meet the stipulated norms 3. This new tanning system provides new insight on ecofriendly tanning system for the sustainability of leather industry

New distributional record of Istigobius diadema (Steindachner, 1876) and Lobotes surinamensis (Bloch 1790) from the Pulicat lagoon, India

The present study records spectacled sand-goby Istigobius diadema (Gobiidae) and tripletail Lobotes surinamensis (Lobotidae) for the first time from Pulicat lagoon, India. Morphological and meristic characters for both the species are described herein. This study finds the current observations as new distributional records for the above two species, thereby adding two more additional species to the ichthyofaunal diversity of Pulicat lagoon

Morphological identification and occurrence of engraulid eggs off Gulf of Mannar, South east coast of India

1565-1570Sampling of eggs of species of family Engraulidae was investigated at three stations in the nearshore waters of Gulf of Mannar, for the period of January 2018 to December 2018. During sampling, the quantities and distributions of eggs of engraulids were determined. Horizontal tow was conducted from the surface (0-5 m), a plankton net of 45 cm in diameter and 150 μm mesh. The eggs of engraulids sampled in plankton tows were found to be 542.92 ind./100 m3. A total of 1,075 eggs belonging to 8 species were identified during the sampling period. Eggs of Encrasicholina heteroloba, E. punctifer, Setipinna taty, Stolephorus baganensis, S. tri, Thryssa hamiltonii, T. dussumieri and T. mystax were identified. Engraulid eggs were found throughout the year in the nearshore waters of Punnakayal and Thoothukudi, but they were much abundant during the summer season. A significant positive correlation was found between environmental factors and the occurrence of eggs at Thoothukudi and Punnakayal stations. Thus Punnakayal region of Gulf of Mannar is identified as the spawning ground for the engraulid fishes

Occurrence of Oratosquilla oratoria (De Haan, 1844) and Oratosquillina gravieri (Manning, 1978) from the trawl bycatches of Nagapattinam region, Tamil Nadu

1029-1036Six species of mantis shrimps were recorded in the trawl catches of Nagapattinam region during January – December, 2018. The occurrence of two species namely Oratosquilla oratoria (De Haan, 1844) and Oratosquillina gravieri (Manning, 1978) were reported for the first time in the trawl bycatches of Nagapattinam region. The morphometrics of these two species is reported in this paper. Presence of inferodistal spine in the merus of the raptorial claw, rostral plate short and trapezoid to square in shape, 5th abdominal segment without submedian patch, 4th abdominal segment submedian carinae unarmed in Oratosquilla oratoria and rostral plate elongate and rectangle, lateral process of 6th thoracic somite with slender, triangular anterior lobe and dactylus of the raptorial claw with 6 teeth in Oratosquillina gravieri are chief characters to differentiate from other species