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1000 tulosta hakusanalla Vivek Aggarwal

Badania nad obróbką elektroerozyjną

Badania nad obróbką elektroerozyjną

Vivek Aggarwal; Saral Dania

Wydawnictwo Nasza Wiedza
2025
nidottu
W obecnej sytuacji konkurencyjnej rośnie zapotrzebowanie na stopy o wysokiej twardości, odporności na uderzenia i wytrzymalości. Ponieważ materialy te są trudne do obr bki konwencjonalnymi metodami, stosuje się zazwyczaj metody niekonwencjonalne, takie jak obr bka elektroerozyjna (EDM). W niniejszej pracy przedstawiono badania parametryczne procesu obr bki elektroerozyjnej stopu EN-19 z uwzględnieniem wielu charakterystyk wydajnościowych przy użyciu metodologii powierzchni odpowiedzi. Do oceny efekt w obr bki wybrano charakterystyki wydajnościowe, a mianowicie szybkośc skrawania i chropowatośc powierzchni. Parametry procesu wybrane w niniejszym badaniu to czas trwania impulsu, czas przerwy między impulsami, prąd i napięcie. Eksperymenty zaplanowano zgodnie z centralnym projektem kompozytowym metodologii powierzchni odpowiedzi. Wyniki eksperyment w pokazują, że szybkośc skrawania wzrasta wraz ze wzrostem prądu i czasu trwania impulsu, natomiast chropowatośc powierzchni maleje wraz ze wzrostem prądu i czasu trwania impulsu, a szybkośc skrawania maleje wraz ze wzrostem czasu wylączenia impulsu, natomiast chropowatośc powierzchni wzrasta wraz ze wzrostem czasu trwania impulsu.
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Investigações sobre usinagem por descarga elétrica

Investigações sobre usinagem por descarga elétrica

Vivek Aggarwal; Saral Dania

Edicoes Nosso Conhecimento
2025
nidottu
Neste cen rio competitivo, a procura por materiais de liga com alta dureza, alta resist ncia ao impacto e tenacidade est aumentando. Como esses materiais s o dif ceis de usinar por m todos convencionais, m todos n o convencionais como a usinagem por descarga el trica (EDM) s o geralmente empregados. Neste trabalho, s o relatadas investiga es param tricas do processo de usinagem por descarga el trica para a liga EN-19, considerando m ltiplas caracter sticas de desempenho utilizando a metodologia de superf cie de resposta. As caracter sticas de desempenho, nomeadamente a taxa de corte e a rugosidade da superf cie, s o escolhidas para avaliar os efeitos da usinagem. Os par metros do processo selecionados neste estudo s o o tempo de pulso, o tempo de desligamento do pulso, a corrente e a tens o. As experi ncias foram planeadas de acordo com o desenho composto central da metodologia de superf cie de resposta. Os resultados experimentais mostram que a taxa de corte aumenta com o aumento da corrente e do tempo de pulso, enquanto a rugosidade da superf cie diminui com o aumento da corrente e do tempo de pulso, e a taxa de corte diminui com o aumento do tempo de pulso, enquanto a rugosidade da superf cie aumenta com o aumento do tempo de pulso.
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Introduction to DC Microgrids

Introduction to DC Microgrids

Vivek Agarwal; Prajof Prabhakaran; Mosaddique Nawaz Hussain

Wiley-Blackwell
2025
sidottu
Discover the art and science of designing, building, and installing DC microgrid systems with this authoritative resource Introduction to DC Microgrids delivers a comprehensive and concise introduction to the fundamentals of DC microgrid technology. Beginning with the basic concepts of DC systems and their various constituents, the book moves on to a variety of DC architectures and voltage levels of DC microgrid systems. Typical examples, use cases, and applications round out the material to form a practical and accessible resource ideal for students, professionals, and enthusiasts. Accomplished engineers and authors, Vivek Agarwal and Prajof Prabhakaran, offer readers solved numerical examples in every chapter to shore up the theoretical concepts presented. They also discuss different types of power converters used in several roles in DC microgrid systems and common issues faced by those who install and use them. Introduction to DC Microgrids makes a compelling case for the merits of using DC microgrids over AC solutions and includes usable techniques to determine optimal placement of loads and sources. You’ll also learn from: A complete introduction to DC microgrid systems with discussions of a variety of reported architectures and voltage levelsA fulsome description of power electronic converters in DC microgrid systems with simulation and experimental results of several different convertersAn explanation of DC microgrid control methods, including novel control techniques to minimize voltage regulation and improve load sharing accuracyA treatment of power quality and protection of DC microgrids, including a discussion of how to mitigate voltage fluctuation and harmonic issuesPerfect for doctoral, graduate, and senior undergraduate students in electrical engineering and related programs, Introduction to DC Microgrids also has a place on the bookshelves of diploma students, technicians who install and implement microgrid systems in the field, and industrial professionals interested in electrical sustainability projects.
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Power Converters for Extraction and Conversion of Solar Photovoltaic Energy

Power Converters for Extraction and Conversion of Solar Photovoltaic Energy

Sachin Jain; Vivek Agarwal; Venu Sonti

Academic Press Inc
2025
nidottu
Renewable energy alternatives are fast becoming viable options to battle conventional fossil fuel shortcomings such as pollution, cost, and limited reserves. Understanding the requirements and source characteristics for successful power electronics and their application is pivotal to extracting power successfully. Power Converters for Extraction and Conversion of Solar Photovoltaic Energy provides a detailed analysis of the various power converter operations fed by solar PV energies. Practical aspects addressing the behavior of systems such as the operating point on source characteristics and when power converters buck or boost are considered as well, and are fundamental to effective use and applications of renewables. With computer simulation models for typical systems to give the reader a deeper insight and “feel” for the actual system, this book provides readers with a useable tool to develop and design their own systems and achieve successful power extraction.
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Understanding and Managing Power Quality Issues

Understanding and Managing Power Quality Issues

Sincy George; George Sebastian; Vivek Agarwal

INSTITUTION OF ENGINEERING AND TECHNOLOGY
2026
sidottu
The increasing complexity of today's power systems, and the growing numbers of power electronic devices that are being introduced, adds to the risk of power quality problems caused by harmonics. Non-linear loads into power systems, non-sinusoidal and distorted current waveforms, and voltage distortion have become more common, and these phenomena can lead to power losses and damage to equipment. Understanding and Managing Power Quality Issues is a reference for researchers involved with power systems, professionals in power equipment industry and at grid operators, as well as for advanced students, transmission network and grid operators. The authors use mathematical analysis to describe the mechanisms of various power quality issues. Harmonics in the power system are a major focus, and coverage also encompasses power quality of power supply systems, reliability indices, sinusoidal and non-sinusoidal conditions, techniques for control of voltage variation, reactive power, active power quality management, and current trends.
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Biosurfaces

Biosurfaces

Kantesh Balani; Vivek Verma; Arvind Agarwal; Roger Narayan

John Wiley Sons Inc
2015
sidottu
Ideal as a graduate textbook, this title is aimed at helping design effective biomaterials, taking into account the complex interactions that occur at the interface when a synthetic material is inserted into a living system. Surface reactivity, biochemistry, substrates, cleaning, preparation, and coatings are presented, with numerous case studies and applications throughout. Highlights include: Starts with concepts and works up to real-life applications such as implantable devices, medical devices, prosthetics, and drug delivery technologyAddresses surface reactivity, requirements for surface coating, cleaning and preparation techniques, and characterizationDiscusses the biological response to coatingsAddresses biomaterial-tissue interactionIncorporates nanomechanical properties and processing strategies
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Vivek Singh's Indian Festival Feasts

Vivek Singh's Indian Festival Feasts

Singh Vivek

Absolute Press
2017
sidottu
It is said that in India a festival is celebrated every day of the year. In this gastronomic celebration of India’s festival cuisine, head chef of London’s acclaimed Cinnamon Club, Vivek Singh brings his unique touch to traditional festival recipes and gives his insight into the significance of food from a country with a history of such diverse religions and cultures. Chapters include the most popular festivals celebrated around the world, such as Holi, Onam and Diwali, covering all religions and geographical areas within India, with Vivek’s very own take on the recipes most associated with them. As well as these brand new recipes, the history and culture surrounding each festival will be explored in colourful detail. The accompanying photography will further bring alive the beauty and vibrancy of these incredible celebrations.
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Vivek-Roobala-Vishnu Athiradi Thuppariyum Novelgalthoguthi 1

Vivek-Roobala-Vishnu Athiradi Thuppariyum Novelgalthoguthi 1

Notion Press, Inc.
2021
nidottu
Crime Novelist Rajeshkumar's famous Iconic character Vivek investigating Story Series for you. Along with him, his wife Roopala and his associate Vishnu are also featured in all the stories to add a fizz factor.Three Novels in the Action-Packed Thriller Series 1VivekVivek started his career as a CID officer and with his unique investigative abilities, he was recommended by the Central Government to the Special Crime Division (SCD) of CBI. The duties of an SCD officer include the investigation of serious crimes that occur in India and all over the world. Vivek belongs to this elite group.As Vivek is a 'Forever Young' personality, it is not permitted to know his Date of Birth.RoopalaRoopala, a gorgeous home science graduate, had aspirations to work for the police department. But had to drop off as her parents were against her wish. At the same time, she fell in love with Vivek and got promoted to Mrs. Vivek. Whenever Vivek handles challenging cases, Roopala never misses to provide him tips and suggestions.VishnuVishnu is an assistant officer to Vivek and is considered to be a shadow of him. He is a comical character and at the same time a substance material. His inputs and tips to Vivek adds value during critical and problematic cases.
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Vivek-Roobala-Vishnu Thuppariyum Athiradi Novelgal - Thoguthi 3

Vivek-Roobala-Vishnu Thuppariyum Athiradi Novelgal - Thoguthi 3

Notion Press Media Pvt Ltd
2021
pokkari
Crime Novelist Rajeshkumar's famous Iconic character Vivek investigating Story Series for you. Along with him, his wife Roopala and his associate Vishnu are also featured in all the stories to add a fizz factor. Four Novels in the Action-Packed Thriller Series 3VivekVivek started his career as a CID officer and with his unique investigative abilities, he was recommended by the Central Government to the Special Crime Division (SCD) of CBI. The duties of an SCD officer include the investigation of serious crimes that occur in India and all over the world. Vivek belongs to this elite group.As Vivek is a 'Forever Young' personality, it is not permitted to know his Date of Birth.RoopalaRoopala, a gorgeous home science graduate, had aspirations to work for the police department. But had to drop off as her parents were against her wish. At the same time, she fell in love with Vivek and got promoted to Mrs. Vivek. Whenever Vivek handles challenging cases, Roopala never misses to provide him tips and suggestions.VishnuVishnu is an assistant officer to Vivek and is considered to be a shadow of him. He is a comical character and at the same time a substance material. His inputs and tips to Vivek adds value during critical and problematic cases.
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Vivek Ojis død

Vivek Ojis død

Akwaeke Emezi

Rebel With a Cause
2022
nidottu
”Hvis ingen ser dig, er du der så alligevel?” En øm og følsom fortælling om at miste et barn, man aldrig rigtig har kendt, om kroppens betydning og mangel på samme, om at finde sit sande selv i kærlighedens navn. Vivek Ojis mor finder sin søns døde krop uden for sin hoveddør, og dermed tvinges hun ud på en rejse, hvor hun lærer det barn at kende, som hun aldrig rigtig forstod. ”Han var lille dengang, levende. Kavita kunne lade håndfladen falde, og så ville den lande på hans lille rundede baghoved, på det bløde hår og den varme hud nedenunder, den kuppelformede knogle, som formede ham. Mange år senere, da hun fandt hele hans legeme udstrakt på deres veranda, under fire meter akwete-stof i røde og sorte tern, erklærede hun, at hun aldrig ville glemme, at bagsiden af hans kranium var revnet og sivet ned i dørmåtten. Kavita løftede alligevel hans nakke for at presse sin kind mod hans og skrige. Hans hår faldt ud over hendes arme, vådt og langt og tykt, og hun jamrede.”Røg direkte ind på New York Times bestsellerliste ved udgivelsen i USA.
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Vivek Ojis död

Vivek Ojis död

Akwaeke Emezi

Bokförlaget Tranan
2022
sidottu
"Lika briljant som den är hjärtekrossande." MARIE CLAIRENgwa, Nigeria. En eftermiddag hittas Vivek Ojis döda kropp utanför hans hem, insvept i ett färgglatt tygstycke. Med tiden förstår de förkrossade föräldrarna att deras son, som de kände som introvert och skör, var en helt annan människa bakom lyckta dörrar. Genom hans vänners berättelser framträder en frisinnad person full av liv, och bit för bit avtäcks hemligheterna om hans liv och död. Vivek Ojis död är en hjärtskärande roman om vänskap, passion och kärlek och om en ung människa som inte ryms inom sitt samhälles trånga ramar.AKWAEKE EMEZI (f. 1987) växte upp i Aba i Nigeria med en nigeriansk far och en mor från Malaysia, men bor numera i New Orleans i USA. Debutromanen Sötvatten innebär ett stort genombrott i den engelskspråkiga världen och produceras nu som TV-serie. Emezi har genom sitt författarskap blivit en ikon i queer- och transkretsar och har förekommit på omslaget till stora magasin som Time och Vogue. Hen har också givit ut två ungdomsromaner, en memoar och en diktsamling och tagit emot ett flertal priser. Vivek Ojis död är hens andra roman. HELENA HANSSON har översatt en lång rad författare från Afrika, däribland 2021 års Nobelpristagare Abdulrazak Gurnah. För sin översättning av Sötvatten var hon finalist till priset Årets översättning."En bländande, förkrossande historia ... Ett pussel inslaget i ett vackert språk, som väcker frågor om identitet och lojalitet som är lika omöjliga att besvara som de är viktiga att ställa. NEW YORK TIMES BOOK REVIEW"Emezi uppmanar oss återigen att omfamna ett vidare spektrum av den mänskliga erfarenheten." WASHINGTON POST"Vivek blir mer levande för varje sida som går. Han strålar som solen, omöjlig att stirra rakt in i men samtidigt alldeles oemotståndlig. Jag saknade honom när romanen tog slut. NATIONAL PUBLIC RADIO, USA
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