Komparativna analiza primjene optimalnog upravljanja za automatsko upravljanje sustavima za proizvodnju električne energije

In this study, an attempt is made to present the application and comparative performance analysis of optimal control approach for automatic generation control (AGC) of electric power generating systems. Optimal controller is designed utilizing performance index minimization criterion. To conduct the study, various single and multi-area models with/without system nonlinearities from the literature are simulated under sudden load perturbation. In this comparative study, to corroborate the worth of optimal controller, the performance of optimal AGC controller is compared with that of I/PI controller optimized adopting recently published the best established techniques such as teacher learning based optimization (TLBO), differential evolution (DE), genetic algorithm (GA), particle swarm optimization (PSO), hybrid bacteria foraging optimization algorithm-PSO (hBFOA-PSO), craziness based PSO (CBPSO), firefly algorithm (FA), krill herd algorithm (KHA), moth-flame optimization (MFO), glow swarm optimization (GSO), simulated annealing (SA), bat algorithm (BA), stochastic fractal search (SFS) and hybrid SFS-local unimodal sampling (hSFS-LUS) technique. The simulated results are compared in terms of settling time (ST), peak undershoot (PU)/overshoot (PO), various performance indices (PIs), minimum damping ratio and system eigenvalues. A sensitivity study is conducted to certify the robustness of optimal controller.U ovom radu se razmatra primjena i komparativna analiza sustava za automatsko planiranje proizvodnje proizvođača električne energije. Sinteza optimalnog regulatora proporcionalno-integralne strukture je provedena korištenjem integralnih kriterija. Različiti modeli s jednim područjem i više područja te s i bez nelinearnosti korišteni su u simulaciji nagle promjena opterećenja. Kako bi se pokazala važnost optimalnog regulatora, u komparativnoj analizi su performanse dizajniranog optimalnog regulatora uspoređene s peformansama postignutim korištenjem I i PI regulatora sintetiziranih primjenom postojećih uobičajeno korištenih metoda kao što su "teacher learning optimization", diferencijska evolucija, genetski algoritam, optimizacija rojem čestica, "hybrid bacteria foraging" optimizacijski algoritam, "craziness based" optimizacija rojem čestica, "firefly" algoritam, "krill herd" algoritam, "moth-flame" optimizacija, "glow swarm" optimizacija, metoda simuliranog kaljenja, "bat" algoritam, stohastično fraktalno traženje (eng. "stochastic fractal search", SFS) i metoda hibridnog SFS lokalnog unimodalnog uzorkovanja. Performanse primijenjenih algoritama upravljanja vrednovani su usporedbom ostvarenih vremena ustaljivanja, iznosa podbačaja i prebačaja te drugih pokazatelja performansi, minimalnih relativnih koeficijentima prigušenja i svojstvenih vrijednosti sustava upravljanja. Provedena analiza osjetljivosti potvrđuje robusnost parametara optimalnog regulatora za širok raspon radnih točaka i parametara sustava

Stunted root development: a rare dental complication of Stevens-Johnson syndrome

Stevens-Johnson syndrome (SJS) is a severe cutaneous reaction seen rarely in clinical practice. Most often, it occurs as an adverse reaction to certain drugs. When it affects children at a very young age, arrested tooth root development may also be seen. We present a case of a 13 year old boy who suffered from SJ syndrome at the age of 7 years. Incomplete root development was observed in all teeth, as demonstrated by panaromic radiography. Clinical features of this condition and its management are further discussed. We aim to emphasise on the need for dental practitioners to be aware of the potential dental complications of SJS and enable them to recognise and manage the condition at the earliest so as to avoid any undesirable sequelae

VANET: Analysis of Black hole Attack using CBR/UDP Traffic Pattern with Hash Function and GPSR Routing Protocol

With momentum of time huge development occurred in the field of MANET and VANET. As we know when new technology emerges it came with many advanages but definitely some limitation must be there. In WSN security is one of biggest challenges which we need to tackle to implement adhoc network. Main reason behind this is dynamic topology of sensing node because nodes are dynamic in nature rather than static. As technology came into existence side by side unethical activity also take place which try to access the data illegally to gain personnel profit. There are so many types of attack possibilities are there in adhoc network. Attack can be classified into active and passive. In our research article oue main concern is on black hole attack. According to this attack a malicious node with high priority number is deployed in between other nodes. Now this malicious node access the data and sends acknowledgement to source that data received. Source node will think that acknowledgement is sent by destination node but actually it is sent by malicious node.  In this research article performance analysis of the black hole attack in Vehicular Ad Hoc Network is executed

Design as a tool for reformation in the juvenile justice system through a participatory approach

Reformation and rehabilitation of children below 18 years of age who come in conflict with the law is overseen by the Juvenile Justice System in India. (4) The system reinforces “reformation” over deterrence but has been largely inaccessible and lesser known for long. (3) Through its Children’s Homes, the system aims at reformation but the varying attitudes and lack of sensitization while dealing with children has affected what reformation means. This paper starts with a look at the reformation in the juvenile justice system through a human centred lens throwing light on the pain-points of stakeholders at multiple stages and challenges to reformation. It further expands on research methodology led by design. These methods centred around gamifying research process helped greatly to interact with the children in the sensitive environment to build a conducive atmosphere where real insights could be shared. The ability to empathize with the stakeholders and using the design process to identify their needs, prototype and test new frameworks with them gave us an advantage as designers. Through dialogue, workshops and interactive sessions in the homes; the children presented perspectives which questioned the current view of reformation. The paper concludes with design interventions to make reformation a participatory process led by child as a contributing element of the society and a model critiquing and questioning aspects of the current system

Analysing Research Trends in the Indian Hospitality and Tourism Sector: A Bibliometric Analysis for the Period 2000-2021

The purpose of the study was to have a better clarification of the popular themes studied by Indian researchers during the period 2000 to 2021. The paper helped in identifying the trends and development in research area in context to Indian Hospitality and tourism sector. The study selected a total of 1821 research papers of Indian origin from the scopus database during a span of 22 years (2000-2021). The selected publications were analyzed using different bibliometric methods of analysis using biblioshiny and VOS viewer within the scope of several parameters. The complete time period was divided into three distinct timeframes to study the research trends during the period. The maximum number of articles published in recent years, i.e. 2020, while minimum article publications in 2001. 1241 citations received in 2019 while only 110 citations received in 2005. “Worldwide Hospitality and Tourism Themes” and “International Journal of Contemporary Hospitality Management” were found to be the most productive journals. While ‘Singh S.’ is the most productive authors with a maximum number of articles, while 'Jauhari V' has the most number of citations for his work. Sustainability and conservation are the themes of common interest irrespective of timeframe, while the role of social media, covid 19 are recent trending topics for researchers. The study does contain certain limitations despite contributing significantly to the Hospitality and tourism literature in Indian context. The present study did not included publications other than articles like conferences proceedings, book chapters and dissertations etc. Selection of tools used and the keywords chosen for the study also limit the outcome. The findings of the analysis is helpful in better understanding the direction of research themes in the hotel and tourism industries. Evaluation of prominent authors and their work again helps on focusing the trending themes in the sector among researchers. Furthermore it helps future researchers in identifying key issues in the field of hospitality and tourism. The sample for this study, to the best of the authors' knowledge, was the most comprehensive collection of articles published in India's hospitality and tourism industries. This study adds substantially to the existing literature by highlighting current research orientations and trends in hospitality and tourism

Emerging Trends in Management Research

Emerging Trends in Management Researc

AGC performance amelioration in multi-area interconnected thermal and thermal-hydro-gas power systems using a novel controller

Due to varying structure, random load demands, nonlinearities, parameters ambiguity, steadily escalating size and intricacy of the interconnected power system (IPS), automatic generation control (AGC) is treated as one of the biggest crucial issues in IPS. Hence, expert, intelligent and robust control scheme is indispensable for stable operation of IPS and supply of electricity under sudden load demand disturbances. In vision of this, in this work, a novel cascade fuzzy-proportional integral derivative incorporating filter (PIDN)-fractional order PIDN (FPIDN-FOPIDN) controller is offered as an expert control strategy to deal effectively with AGC issue of IPS. Imperialist competitive algorithm is prolifically utilized for optimizing the controller parameters. Initially, a two area non-reheat thermal IPS is studied in detail and next to attest the efficacy of the technique, the study is extended to realistic two-area multi-source thermal-hydro-gas and reheat thermal three-area systems. The prominent benefit of cascade FPIDN-FOPIDN strategy comprises its great lethargy to large load demands and its supremacy over various latest intelligent classical/fuzzy controllers. The control strategy beats several techniques concerning significant lesser settling time, oscillations, over/under shoots and different performance index values. Finally, a robustness investigation is performed in order to validate the robustness of the controller. (C) 2020 Karabuk University. Publishing services by Elsevier B.V.WOS:0006270704000022-s2.0-8509201046

Pulmonary cement embolism: a complication following vertebroplasty - a case report with brief review of literature

Abstract Background A minimally invasive treatment for vertebral compression fractures is vertebroplasty. In spite of its relative safety, complications have been reported. It is a relatively uncommon complication among these that patients experience massive cement pulmonary embolism. Polymethyl methacrylate (PMMA) can cause embolization in the pulmonary arteries. One of the most common cements used in vertebroplasty is PMMA, a type of acrylic cement. Pulmonary cement embolism can occur if cement leaks into the perivertebral veins and then the pulmonary arteries (Barbero et al., Radiol Med 113:101–13, 2008). Occasionally, the patient will show no symptoms at all, while other times they will experience dyspnea, chest pain, or acute respiratory distress syndrome. A 54-year-old male who underwent vertebroplasty developed pulmonary cement embolism is the patient in our case report. Case presentation A 54-year-old male had complaints of breathlessness for 1 week and left lower limb and lower back pain associated with swelling of the lower limbs for 20 days. The patient is an operated case of osteoporotic compression fractures of D6, D11, L1, L3, and L5 vertebroplasty 3 years back. Subsequently, computed tomography pulmonary angiography was performed and diagnosed with partial embolization of the distal peripheral branches of the bilateral pulmonary arteries by the vertebroplasty material. Conclusion Vertebroplasty and kyphoplasty are the most prevalent procedures used to inject bone cement (PMMA) into the vertebral column in order to treat osteoporosis. With vertebroplasty, the possibility of embolization increases. In vertebral osteoporosis, the primary advantage is a reduction in pain and vertebral body collapse. Pulmonary cement embolization causes chest discomfort and shortness of breath. Sometimes, acute respiratory distress syndrome is present (Yoo et al., Spine (Phila Pa 1976) 29:E294–7, 2004). After the operation, these symptoms rarely arise. Symptoms often appear weeks, months, or years after the surgery (Habib et al., Heart Lung 41:509-11, 2012). Through this case report, we discuss the complication following vertebroplasty and their management guidelines