Robust Model Reference Adaptive Control of Angular Velocity Control Simulation of Brushed DC Motor

Electric motors play an important role in industry as well as our day-to-day life. They are used to generate electrical power in power plants and provide mechanical work in industries. They are also an indispensable part of our daily lives. Electric motors are very important pieces of equipment in our everyday lives. The brushed DC motor is considered to be basic electric motors. The aim of this paper is to introduce students to the modelling of brushed dc motor and to use computer simulation as a tool for conducting transient and control studies. Simulation can be very helpful in gaining insights to the dynamic behaviour and interactions that are often not readily apparent from reading theory. Next to having an actual system to experiment on, simulation is often chosen by engineers to study transient and control performance or to test conceptual designs. Presently, there are many control laws available to control the brushed dc motor. The control law of angular velocity depends on the motor parameters. The motor parameters are time varying, especially load torque, hence adaptive control is one of the best control law. In standard adaptive control, instability may be occur in the presence of unmodeled dynamics. Robust adaptive control is designed so the stability can be guaranteed

Consumption pattern and consumer preference for value- added fish and fish products in north zone of India

Present paper attempts to analyze consumption pattern and consumer preferences towards value-added fish and fish products in north zone of India. Results reveal that socio economic variables affect consumption of value-added fish and fish products. A total of 49 percent respondents were of middle age group (35 t050 years). All were literates except 7 percent from the rural area. All were purchasing fish at least once in 15 days. A total of 90 percent respondents in rural, 77 percent in semi urban and 50 percent in urban area were unaware of value-added fish and fish products. About 10 percent of respondents had consumed it, out of which most were from urban area. Demand analysis by Cobb Douglas (CD) Demand function; revealed that when price of fish, price of the substitutes, income of family and family size were used as independent variables, variation in demand offish explained by CD Demand function was about 39 percent in urban area, 24 percent in semi urban area and 22 percent in rural area. From Garette ranking technique major problems in fish consumption found were irregular supply, lack of fresh fish, high price and presence of bones in fish. While lack of awareness, unavailability, no preference and unacceptable taste were major problems for consumption of value-added fish and fish product

Peran Gerakan Pemuda Ansor Dalam Penguatan Civil Society Di Kabupaten Jepara

Demokrasi yang kuat dan sehat tidak hanya membutuhkan dunia politik (political society) yang kuat. Tentu saja, penting memiliki partai yang kuat, pemimpin yang kuat, dan pemerintahan yang kuat. Namun, demokrasi juga membutuhkan dunia masyarakat (civil society) yang juga sehat dan kuat. Sebagai salah satu penyangga kekuatan civil society Meski hasilnya belum seimbang sesuai dengan harapan publik. Potensi serta modal sosial jika dapat dimanfaatkan secara maksimal oleh GP Ansor tentu akan memiliki dampak yang amat besar bagi perkembangan kehidupan, baik dari segi sosial, ekonomi, budaya serta politik dalam tubuh Ansor maupun masyarakat secara luas sehingga mampu menjadi penggerak dalam penguatan civil society di Indonesia khususnya di Jepara. Tidak dapat dipungkiri keberadaan GP Ansor selama ini terkesan begitu kental dengan aroma politik. Hal ini memang karena aktivis Ansor banyak terlibat di ranah politik. Aktivis GP Ansor lebih tertarik menjadi politisi ketimbang sebagai penyangga gerakan civil society. Sayangnya, naluri politik tersebut belum berkorelasi positif terhadap USAha-USAha GP Ansor dalam turut memberikan pemahaman dalam membangun iklim demokrasi pada masyarakat

Simulasi Sistem Proteksi Petir Eksternal dengan Metode Pembalik Muatan Menggunakan Matlab

Sistem proteksi petir merupakan suatu sistem yang sangat diperlukan pada saat ini, mengingat peralatan listrik semakin berkembang dengan pesat. Sistem ini melindungi kita serta peralatan listrik kita dari sambaran langsung. Di Indonesia sendiri sebagai kawasan dengan intensitas petir yang tinggi. Secara umum, sistem proteksi petir eksternal terdiri dari dua yaitu sistem proteksi Aktif dan sistem proteksi Pasif. Pada penelitian ini akan membahas tentang simulasi sistem proteksi petir dengan metode pembalik muatan dengan menggunakan prinsip kerja Op-Amp dalam MATLAB dimana dalam pengujiannya akan membandingkan dua buah finial dengan mengukur kuat medan listrik antara keduanya, dimana salah satu finial akan dipasang alat pembalik muatan, dan diberinya spark gap untuk proteksi peralatannya tersebut. Besar pengujian alat proteksi ini menggunakan tegangan impuls sampai 150 KV. Dalam pengujiannya hanya menggunakan parameter tegangan. Setelah diuji akan ada perbandingan dengan hasil perhitungan dan model sebelumnya

Multidetector CT arthrography in shoulder instability and its comparison with MR arthrography and arthroscopy

Background: Purpose of this study was to compare diagnostic effectiveness of MDCT arthrography (MDCTA) in shoulder instability and pain in throwing and its comparison to MR arthrography (MRA) and arthroscopy taking arthroscopy as gold standard.Methods: 20 patients with history of recurrent shoulder dislocation in activity were included in this study. After detailed clinical examination, each patient underwent MDCT-MR arthrography in one sitting followed by diagnostic arthroscopy within 6 weeks. Results were compared with the help of statistician.Results: At arthroscopy, 10 Bankart’s lesions, 7 Hill Sachs lesion, 6 SLAP lesion, 1 ALPSA, 1 capsular laxity, 1 partial subscapularis tear and 1 supraspinatus fraying were visualized in 20 shoulders. For Bankart’s lesion MDCT has sensitivity 80%, specificity 100%, positive predictive value (PPV) 100% and negative predictive value (NPV) 83.3%. MRA has sensitivity of 90%, specificity 100%, PPV 100% and NPV 90.9%. For SLAP lesions sensitivity, specificity, PPV and NPV for MDCTA and MRA are 88.3%, 100%, 100%, 93.3%. For Hill-Sachs lesion; sensitivity, specificity, PPV and NPV for MDCTA are all 100% and for MRA they are 85.7%, 100%, 100%, 92.8% respectively. For ALPSA; sensitivity is 100%, specificity is 95%, PPV is 50% and NPV is 100% both for MDCTA and MRA. К value for MRA is 0.60 and for CTA is 0.55 suggesting moderate agreement.Conclusions: Considering availability, cost, time consumption, superior detection of bony lesions and comparable detection of soft tissue lesions; MDCTA can be used as single investigation of choice in shoulder instability pain

Examining Why and for Whom Reflection Diversity Training Works

This research introduces a novel approach to diversity training by theoretically developing and empirically testing a model that considers a new training exercise aimed at improving proximal and distal pro-diversity outcomes. This new training exercise, reflection, is proposed to be effective at increasing pro-diversity attitudes and behaviors due to the promotion of one\u27s internal motivations to respond without prejudice. Further, we test a critical trainee characteristic, social dominance orientation (SDO), as a boundary condition of our proposed effects. Results from an online experiment with two time points indicate that reflection can be an effective diversity training exercise and leads to better pro-diversity attitudes and behaviors through one\u27s internal motivation to respond without prejudice. Social dominance orientation moderated these indirect effects, such that reflection was more effective for those high in SDO, counter to expectations. Implications of this research and future directions are discussed

Epigenetic and phenotypic changes result from a continuous pre and post natal dietary exposure to phytoestrogens in an experimental population of mice

Background: Developmental effects of exposure to endocrine disruptors can influence adult characters in mammals, but could also have evolutionary consequences. The aim of this study was to simulate an environmental exposure of an experimental population of mice to high amounts of nutritional phytoestrogens and to evaluate parameters of relevance for evolutionary change in the offspring. The effect of a continuous pre- and post-natal exposure to high levels of dietary isoflavones was evaluated on sexual maturity, morphometric parameters and DNA methylation status in mice. Adult mice male/female couples were fed ad libitum either with control diet (standard laboratory chow) or ISF diet (control diet plus a soy isoflavone extract at 2% (w/w) that contained the phytoestrogens genistein and daidzein). In the offspring we measured: i) the onset of vaginal opening (sexual maturation) in females, ii) weight and size in all pups at 7, 14, 21 and 42 days post-natal (dpn) and iii) DNA methylation patterns in skeletal α-actin (Acta1), estrogen receptor- α and c-fos in adults (42 dpn). Results: Vaginal opening was advanced in female pups in the ISF group, from 31.6 ± 0.75 dpn to 25.7 ± 0.48. No differences in size or weight at ages 7, 14 or 21 dpn were detected between experimental groups. Nevertheless, at age 42 dpn reduced size and weight were observed in ISF pups, in addition to suppression of normal gender differences in weight seen in the control group (males heavier that females). Also, natural differences seen in DNA methylation at Acta1 promoter in the offspring originated in the control group were suppressed in the ISF group. Acta1 is known to be developmentally regulated and related to morphomotric features. Conclusion: This study demonstrates in mammals that individuals from a population subjected to a high consumption of isoflavones can show alterations in characters that may be of importance from an evolutionary perspective, such as epigenetic and morphometric characters or sexual maturation, a life history character.We greatly appreciate the linguistic revision of the manuscript by Renée Hill and critical review of the manuscript by Dr. Anders Lindroth. We are very thankful for funding by FONDECYT projects 1010647 to PS and 1030309 to LV, CONICYT fellowship for graduate studies and MECESUP grant for overseas training to CG, and NH&MRC project grant funding to SJC

Living with a diagnosis of behavioural-variant frontotemporal dementia: The person’s experience.

YesResearch investigating behavioural-variant frontotemporal dementia has concentrated on identifying and quantifying people’s difficulties; yet few studies have considered how people with behavioural-variant frontotemporal dementia make sense of their difficulties. Five participants were interviewed and interpretive phenomenological analysis used to analyse the data. Two superordinate themes emerged: ‘Bewilderment’ and ‘Relationships with others’. ‘Bewilderment’ reflected the feelings of the participants from the start of their dementia, and was divided into two main themes (1) ‘Awareness of change: What’s the problem? and (2) Threats to self: This is not me. The superordinate theme, ‘Relationships with others’, reflected difficulties with social relationships and comprised two main themes (1) ‘Family and friends: Things haven’t changed… but do I say anything wrong?’ and (2) Coping with threats to self: Blame others or just avoid them. The themes were discussed in relation to literature evaluating the difficulties associated with behavioural-variant frontotemporal dementia together with implications for clinical practice