The evolution of orthodontic materials in the past 5 decades has been a unique progress curve characterized by periods of intense activity with many developments followed by long quiescent intervals. An example of the delay in adopting the advances in dentistry might well be illustrated by the acid-etching technique, which was introduced in the mid 1950s1 and became universally accepted in the 1960s. It took more than a decade for this practice to become standard procedure in orthodontics on a large scale. Infact, orthodontic bonding has advanced more in last 10 years than previous 25. In the past decad
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BLEACHING IN DENTISTRY
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BONDING IN ORTHODONTICS
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- Author: : DR.ARCHANA KUMARI, DR. SUBHASH KUMAR, DR. NAVEEN KUMAR, DR. DEBJIT SAHA
- Language : English
- Paperback : 196 pages
- ISBN-13 : 978-93-5515-274-9
- Country of Origin : India
- Generic Name : Thesis
- Publisher : Book Rivers(14 March 2022)
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Fracture Behavior of Biological Materials and Interfaces
Fracture Behavior of Inhomogeneous Biological Materials and Interfaces
Biological materials like bone, nacre, human tooth layers are inhomogeneous materials made up of soft collagen, and hard, hydroxyapatite (HAP) mineral arranged in such a fashion so that these materials have higher strength and toughness, the measure of crack resisting behavior in materials, at the same time, which is exclusive in nature for different class of materials available for different application areas. The interfaces in these biological materials are designed in such a fashion so that the load transfer between the constituents takes place so smoothly, therefore, become a region of strength, not susceptible to failure like in other man-made materials and composites. It is important to understand these aspects of biological materials so that they can be mimicked to the novel materials to satisfy the growing need of different industries.
This work is focused on studying different layers of human tooth, and its interface for crack initiation and growth, the crack arresting behavior of the interface layer of the outer cover of human tooth, the enamel, and the inner, dentine, called dentine enamel junction. These works are done by developing a numerical model using the commercial finite element analysis tool, ABAQUS. The crack growth pattern of the enamel and the dentine has also been investigated. The role of porosity and permeability on the energy release rate which is the measure of fracture toughness has also been investigated. The key features of the book are:
- Study on the role of shear modulus of the defect and the matrix material in which the defect is embedded on the energy release rate.
- The role of small coating layer between the outer matrix and the inner layer on the fracture behavior, especially the stress concentrations in these different layers due to change in the elastic modulus.
- The crack growth pattern in human enamel, the outer tooth layer.
- The crack arresting phenomena of the interfacial, dentine enamel junction (DEJ).
- The role of porosity and permeability on the energy release rate in the inner layer of human tooth, dentine.
The Postcolonial Experience
I would like to investigate the genre of postcolonial
science fiction in the context of capitalist globalization.
Science fiction is predominantly a western genre, and it is
very difficult to find postcolonial/third world works in this
genre. I will first try and establish the validity of this genre
and how it relates to globalization and imperialism. Some
of the key questions I will examine are: How postcolonial
science fiction relates to late capitalism and globalization?
What is the role of technoscapes in the genesis of
postcolonial science fiction genre and how in turn
postcolonial science fiction represents technoscapes?
MYOFUNCTIONAL APPLIANCES
ISBN 13: 978-93-90548-44-6
Authors:Dr. Saurav Kumar,Dr. Nadira Hassan ,Dr. Ravi Anjan ,Dr. Himanshu Kaushik ,Dr. Sana Shaikh
Publisher : Book Rivers (21 October 2020)
Language : English
Paperback : 158 pages
Country of Origin : India
Generic Name : Thesis
कामकाजी माताएँ एवं किशोर
कुछ शोध परिणामों से यह ज्ञात हुआ है कि व्यवसाय का प्रकार, व्यवसाय की स्थिति/पद तथा माता का व्यवसाय से समझौते का स्तर, माता की क्रियाओं की गुणवत्ता तथा बालकों की देख-रेख के स्तर में महत्वपूर्ण भूमिका का निर्वाह करता है। इस सम्बन्ध में हाॅफमैन (1989) बताते हैं कि व्यवसायरत् माताओं की कि‛ाोर बालिकायें सामाजिक रूप से अपने आपको अधिक समर्थ पाती हैं। उनके आत्मवि‛वास, आत्म उपयुक्ततता एवं स्वतंत्रता की भावना में बढ़ोत्तरी होती है। यही तथ्य बालकों के लिए अलग होता है क्योंकि माताओं का व्यवसायरत् होना कि‛ाोर बालकों पर अलग प्रकार का प्रभाव डालता है। इसके विपरीत बहुत ही सफलतम परिवारों में व्यवसायरत् माताओं के कि‛ाोरों की बुद्धिलब्धि तथा पहचान अधिक उच्च कोटि की होती है। यह विपरीत प्रभाव कई कारणों से प्रभावित होता है।
STORE ATMOSPHERICS AND CONSUMER BEHAVIOUR K.SARANYA
The country has seen a radical revolution in retailing
after globalization. Different formats of stores have been
opened up many in cities across India. The multi-storied
malls, hypermarkets, supermarkets have all made a
revolution in retail experience among the consumers.
Therefore, the customers do not only visit the store for
buying goods and services, they go with the expectation of
having fun, entertainment, spending leisure time etc.
Moreover, the consumers‟ purchasing power has been
increasing and this encourages the retailers to concentrate
on building a better environment in the stores.
भगवतीस्तोत्रावलिः
प्रणाम्!! आप जिस पुस्तक के बारे में प-सजय़ रहे हैं वह एक संस्कृत काव्य है जिसमें भगवती दुर्गा की स्तुतियाँ निहित हैं। यह संस्कृत भाषा की पद्य शैली की रचना है जिसका हिन्दी अनुवाद भी है। संस्कृत में गीत परक रचित काव्य आप पाठक-ंउचयजन को अवश्य आनन्द देने वाला होगा। अतः आपसे सानुरोध निवेदन है कि इस पुस्तक को एक बार अवश्य प-सजय़े। आपके आशीष का आकाँक्षी। धन्यवाद!!
RETAIL STORE MANAGEMENT
Retail comes from the French word retailler. It was
used with the meaning of "sale in small quantities" in 1433.
Retail is the last phase of an economic activity. As per
Philip Kotler, Retailing includes all the activities involved
in selling goods or services to the final consumers for
personal or non-business use. It is those business firms in
distribution channel that comes at the end of the pipeline
connecting manufacturers and customers.
ANALOG ELECTRONICS
A better device is the triac, bidirectional thyristor, which allows the full a.c. power to be controlled. It comprises two thyristors connected in parallel and working in opposition but controlled by the same gate. The trigger pulses to a triac are provided by a special device called diac, bidirectional breakdown diode. It is, in effect, two Zener diodes connected back to back. The diac conducts in either direction if the applied voltage reaches the breakdown voltage of about 30 V. This
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