Digital stabilizer for brushless doubly-fed machine

The exceptional feature of the brushless doubly-fed machine is the lack of need for frequent replacement of brushes. The inherent instability of this machine has to be overcome for its application in adjustable speed drives and variable speed generation systems. Specific objectives were: to study the characteristics of the machine pertinent to its application in adjustable speed drives and variable speed generation systems, to develop a stabilizer depending on the nature of the instability. The brushless doubly-fed machine was found to be unstable over much of the useful operating range. A digital feedback control was implemented using a combination of hardware and software elements/to stabilize the machine. The feedback system was a band pass filter. The software was developed with a processing time fast enough to match the speed of response required by the stabilizer to overcome the unstable oscillations. The performance of the machine was compared with and without the stabilizer to test its effectiveness. Stable operation was achieved over the entire operating region

Institution village linkage programme Coastal Agro Ecosystem & Interventions

Agriculture, animal husbandry and fisheries provide maximum employment in the primary sector and form the major source of income and livelihood security of about 70 percent of the population in India. After the introduction of the liberalisation policy and giving thrust for the adoption of improved technologies, there has been a spectacular increase in production in all these segments and the country has witnessed a rapid structural change. Massive adoption of scientific inventions and technological interventions witnessed revolutionary changes in all sectors of development and quality of life of people. Achieving self-sufficiency on food front has been one of the finest Indian successes of the post independence era. The food grain production increased four times (from 50.8 million tonnes during 1950-51 to 198.7 million tonnes during 2000-01) since independence as compared to the three-fold increase in population. Further significant advances have also been made in the production of milk, fish, oilseeds, fruits and vegetables. In fisheries, the country has ushered in the blue revolution with gross production reaching 5.6 million metric tonnes offish and edible invertebrates during 2000- 2001. India is the second largest Asian country in terms of culture fisheries and the third largest in terms of capture fisheries (NAAS, 2001). Due to concerted efforts on strategic research and production technology in oilseeds sector, the country witnessed yellow revolution with the production reaching 25 million tonnes per annum. This was possible as a result of strong agricultural research support provided by the National Agricultural Research System (NARS)

Reaching the unreached: Highlights of Institution Village Linkage Programme of CMFRI

Reaching the unreached: Highlights of Institution Village Linkage Programme of CMFR

Collegiate wrestler with a bicuspid aortic valve and aortic dilation

Bicuspid aortic valve and aortopathy are generally considered contraindications to isometric exercise. For athletes with mild disease at low risk of adverse events, a shared decision-making approach for continued sports participation is reasonable. We present a case of a collegiate wrestler with bicuspid aortic valve and aortopathy to illustrate shared decision making.

The Fundamental Rights of Children Deprived of Liberty in Detention Centres in Malaysia During the Covid-19 Pandemic: A Qualitative Study

The spread of the Covid-19 virus that initially surfaced in China in late 2019 eventually emerged as a global pandemic which adversely affected the worldwide population, including Malaysia. Consequently, the Malaysian government implemented many social and public health measures to help control the spread of Covid-19 in the country. The Covid-19 pandemic affected every level of society in Malaysia, including children who are susceptible to being emotionally, psychologically, and mentally affected due to lockdown measures, school closures, and loss of employment suffered by family members. There is a gap in existing research concerning the impact of Covid-19 on children deprived of liberty in detention centres in Malaysia. Hence, this study aims to identify whether the legal framework in Malaysia adequately protects the rights of children deprived of liberty in detention centres, in line with the international legal framework. A qualitative research design was adopted to explore the issues surrounding the impact of Covid-19 on children in detention centres. Library-based research and semi-structured interviews were carried out with officers from detention centres and the Department of Social Welfare. This research demonstrates that sound policies and guidelines and the availability of fully trained staff are essential in meeting the emotional, physical, and mental needs of children in detention centres. This research is significant for policymakers to strengthen the current legal framework in order to afford better protection for children in detention centres, in line with the Ministry of Women, Family and Community Development Policy (2021-2025) as well as the international legal framework

Factors That Influences the Intention of Middle-Aged Adults' in Johor to Move Into A Retirement Village

Malaysia is in the fifth place for world’s top ten retirement havens. In light to the combination of medical and the growth of old aged community in Malaysia, a few developers are experimenting with the concept of retirement village. The current study aimed to explore and gain a better understanding of the factors that will influence the intention of the middle aged adults in Johor to move into a retirement village. Based on the Theory of Planned Behaviour, the study found that Attitude and Subjective Norm has a positive and significant impact on the intention. Perceived Behavioural Control may be statistically significant but has not accurately predict the intention because of the absence of past behaviour or knowledge. The results indicated that those with tertiary education and who earns more that RM10,000 have intention to move in to the retirement village. The study itself have plausible explanation of the results and paved more opportunities for future research

Online Purchasing Behaviour of Consumers at Zalora in Malaysia

In the 1960s, the emergence of technology introduced by humans spurred the establishment of the Internet that can engage all people globally. Since 1994, the Internet has contributed tremendously towards the evolution of online shopping through the development Electronic Commerce (EC). There are many online shopping websites that have been established by various companies as other alternatives for consumers to purchase their goods or services rather than shopping at the stores. In Malaysia, the reputation and brand image of ZALORA has become the centre and the focus of society. It automatically raises a question among the marketers regarding the motives of the consumers in choosing ZALORA rather than other online shopping websites. This is due to the attractiveness of ZALORA that has led the consumers’ intention in purchasing or ordering the goods or services online. Therefore, it is vital to investigate and identify the factors that influence the consumers' purchasing behaviour as well as their intentions in shopping online at ZALORA. In order to fill the gap of this study, the data of 377 respondents were collected and analysed by using the Statistical Package Social Science (SPSS) software version no.25. The findings show that the website designs of ZALORA have been portrayed as the main factor that has contributed to the purchasing behaviour of consumers for online shopping at ZALORA in comparison to other factors which were convenience, time saving and security

Effect of meso-substituents in the modulation of electronic properties of octaalkylporphine

The electronic structure of octaalkylporphine bearing different meso-substituents (chloro, formyl, hydroxymethyl, nitro and amino groups) has been studied using AM1 and MMX methods. The electronic effect induced by the substituents at meso position considerably alters the optical transition energies, one-electron electrochemical redox potentials of the porphine ring and the pK values of the porphines. The experimentally determined values correlate well with the theoretical predictions. The small puckering of the porphine plane induced by the meso-substituent as revealed by MMX calculations plays a minor role in the observed physical properties

A comparative evaluation of electronic and radiographic determination of root canal length in primary teeth: An in vitro study

Aims: The purpose of this in vitro study was to compare the root canal length determination by Electronic apex locator (EAL) (Raypex 5) and conventional radiography, and then compare them with the actual measurements obtained by direct visualization. Settings and Design: This study was conducted at the Department of Pedodontics and Preventive Dentistry, Government Dental College, Thiruvananthapuram, Kerala, India. Subjects and Methods: One hundred single rooted primary teeth extracted due to extensive caries, trauma, serial extraction or unwillingness of the parent to save the teeth were selected. The teeth were numbered and root canal length was determined using the visual, electronic and the radiographic methods. The actual, electronic and the radiographic measurements were recorded. Statistical Analysis Used: Data were analyzed using Intraclass correlation test and linear regression analysis. Results: The accuracy of EAL and radiographic methods were 92% and 72%, respectively within + 0.5 mm. Both the electronic and conventional radiographic methods showed a high correlation and agreement (ICC intraclass correlation coefficient = 0.99 and 0.98 respectively) with the actual measurements. Conclusions: EALs proved to be more accurate in determining the root canal length than the radiographic method

Effect of meso-substituents in the modulation of electronic properties of octaalkylporphine

The electronic structure of octaalkylporphine bearing different meso-substituents (chloro, formyl, hydroxymethyl, nitro and amino groups) has been studied using AM1 and MMX methods. The electronic effect induced by the substituents at meso position considerably alters the optical transition energies, one-electron electrochemical redox potentials of the porphine ring and the pK values of the porphines. The experimentally determined values correlate well with the theoretical predictions. The small puckering of the porphine plane induced by the meso-substituent as revealed by MMX calculations plays a minor role in the observed physical properties