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150 articles for “CAVs”
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Analysis and Strength Assessment of Solid and Honey Comb Structure of Turbofans in Aeroengines
Abstract: Weight reduction of turbofan engines is one of the main concerns of aero engine manufacturers inorder to reduce fuel burn. To achieve higher fuel efficiency, aero engine manufacturers developturbofans with higher bypass ratio, which can only be achieved with larger (and heavier) fan sections.This makes weight reduction in fan components a major consideration and becomes a key driver forthe use of composite materials in future engines. The objective of this …
Published in Trends in Mechanical Engineering & Technology · Vol. 11, Issue 1, 2021 · pp. 1–16 Read article
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Simulated Design and Characterization of an Efficient Nd:YAG based Solar Pumped Single Mode Laser
Abstract: AbstractAs the current solar pumped lasers have shown to yield a very low efficiency, this research explores the possibility of a simulated design which can be more efficient in converting solar energy into optical power. This paper presents the software design of a Neodymium Doped Yttrium Aluminum Garnet (Nd3+:Y3 Al5 O12) Laser using LASCAD and also presents the characterization of the design using a theoretical mathematical model. Overall, results of …
Published in Trends in Opto-electro & Optical Communication · Vol. 5, Issue 3, 2015 · pp. 39–49 Read article
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Efficient Data Transmission through Fiber Optic Communication System using SOA
Abstract: AbstractThis paper represents the characteristic of Semiconductor Optical Amplifier (SOA) by varying frequency of Vertical Cavity Surface Emitting Laser (VCSEL) which is used as a source at the transmitter end and also injection current of SOA. It is observed that by varying the injection current up to 1 ampere, maximum output power of 0.74935 watt can be achieved at the frequency of VCSEL of 193.1 THz when the optical fiber …
Published in Trends in Opto-electro & Optical Communication · Vol. 4, Issue 2, 2014 · pp. 27–32 Read article
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Effects of Variation of Active Region Radius on the Performance Characteristics of a Designed 1550 nm Al0.09Ga0.38In0.53As/InP MQW VCSEL
Abstract: AbstractIn this work, the performance characteristics of a designed Al0.09Ga0.38In0.53As/InP based 1550 nm top emitting multi quantum well (MQW) vertical cavity surface emitting laser (VCSEL) has been obtained. By evaluating the attained result of different parameters of selected MQW VCSEL the peak material gain is obtained as 1652.3 cm-1. For 6.1 mA of injection current and 5.65 µm of active region radius, the optical output power of 31.37 dBm and …
Published in Trends in Opto-electro & Optical Communication · Vol. 4, Issue 3, 2014 · pp. 8–13 Read article
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Effects of Variation of Injection Current on Characteristics of a 1550 nm Semiconductor Laser
Abstract: AbstractThis work represents the prototype of both the analytical and the simulation based study on high speed communication system particularly high speed data transmission through optical fiber using 1550 nm InGaAsP/InP laser. In recent years, Vertical Cavity Surface Emitting Lasers (VCSELs) are prerequisites for future ultrahigh data-rate systems. This paper represents an overview on high speed performance of the 1550 nm VCSEL. Using MATLAB simulation tool the characteristics of the …
Published in Trends in Opto-electro & Optical Communication · Vol. 3, Issue 2, 2013 · pp. 1–6 Read article
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Performance Analysis of a 1550nm MQW VCSEL by Varying Injection Current
Abstract: AbstractIn this work, the performance of a 1550nm top emitting multi quantum well (MQW) vertical cavity surface emitting laser (VCSEL) has been obtained for the selected quaternary compound In0.53Ga0.47As0.88P0.12 quantum well material the peak material gain is obtained as 1425cm-1. The optical output power of 31.35dBm and the resonance frequency of 5.8GHz are obtained at 6.1mA of injection current. Further by increasing the injection current up to 12mA a maximum …
Published in Trends in Opto-electro & Optical Communication · Vol. 3, Issue 2, 2013 · pp. 25–29 Read article
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Improved Performance Characteristics of a Designed 1050 nm Bottom Emitting MQW VCSEL using Al0.25Ga0.22In0.53As/InP Materials
Abstract: AbstractIn this work, the design and performance characteristics of a bottom emitting Al0.25Ga0.22In0.53As/InP Multi-Quantum Well (MQW) Vertical-Cavity Surface-Emitting Lasers (VCSEL) have been presented for operation at a wavelength of 1050 nm. The transparency carrier density and bandgap energy of the QW and barrier materials are computed. An improved performance of the designed VCSEL has been obtained by selecting a material with high gain and lower transparency carrier density in the …
Published in Trends in Opto-electro & Optical Communication · Vol. 3, Issue 3, 2013 · pp. 22–30 Read article
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Performance Analysis and Optimization of a 1550 nm MQW VCSEL by Varying Differential Gain and Injection Current
Abstract: AbstractIn this work, the performance characteristics of a 1550 nm top emitting multi quantum well (MQW) vertical cavity surface emitting laser (VCSEL) using AlGaInAs/InP are presented. Using this material the peak material gain is obtained as 1652.3 cm-1. A high performance designed VCSEL is obtained with the optimized value of differential gain and injection current. The optical output power of 31.37 dBm and the resonance frequency of 2.5 GHz are …
Published in Trends in Opto-electro & Optical Communication · Vol. 3, Issue 3, 2013 · pp. 31–37 Read article
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Phytochemical, Pharmacological and Unani Traditional Uses of Mazoo (Quercus infectoria): A Review
Abstract: Quercus infectoria (Family: Fagaceae) generally recognized as gall oak, is a trifling shrub originate in Greece, Asia Minor and Iran is predictably assumed to have enormous therapeutic status. There are two varieties of mazoo; one is solid type with no hole on its surface and another is light weighted hold cavity inside and hole on its surface but solid type is medicinally better. Pharmacologically, various animal and human studies have …
Published in Journal of AYUSH: Ayurveda, Yoga, Unani, Siddha and Homeopathy · Vol. 9, Issue 1, 2020 Read article
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Observational Study on the Role of Gandusha (Jambu Patra Kwatha) in the Management of Mukhapaka
Abstract: AbstractMukhapaka is neither a serious disorder nor one that can be dismissed as cursory. It is not life-threatening, but at the same time it can be crippling by grossly disturbing the individual’s life style. Habits like tobacco chewing, smoking, etc., have increased incidences of diseases pertaining to oral cavity. To assess the role of Jambu Patra Kwatha Gandusha, as Upakrama in the management of Mukhapaka. Gandusha of Jambu Patra Kwatha …
Published in Journal of AYUSH: Ayurveda, Yoga, Unani, Siddha and Homeopathy · Vol. 3, Issue 1, 2014 · pp. 1–9 Read article
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Eosinophilia and Its Management with Unani Formulation: A Case Report
Abstract: A 30-year-old man presented in the skin OPD of A & U Tibbia College, Karol Bagh, New Delhi-110005. He complained of diffuse itching without rashes or any lesion with raised absolute eosinophilic count since last 2 months. This patient diagnosed as a case of acute urticaria induced eosinophilia. Patient was given Naqooh Shahtara once daily and treatment was continued till 60 days. At the end of the study, Absolute Eosinophil …
Published in Journal of AYUSH: Ayurveda, Yoga, Unani, Siddha and Homeopathy · Vol. 5, Issue 1, 2016 · pp. 38–40 Read article
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Important Product Used As Cosmetic in Unani Medicine
Abstract: Any single substance or compound product intended for local application of external parts of human body or teeth and mucosal membrane of oral cavity called as cosmetics. The cosmetics are exclusively or mainly used to cleaning, perfuming, beautifying, adorning, changing the personality and appearance, being attracting, etc. The knowledge of these natural cosmetic products was successfully compiled in Unani medicine specially in in Kitab al mansoori & 23rd volume of …
Published in Journal of AYUSH: Ayurveda, Yoga, Unani, Siddha and Homeopathy · Vol. 5, Issue 1, 2016 · pp. 44–47 Read article
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Effectiveness of Puppet Show Regarding Oral Health in Terms of Knowledge and Oral Health Status of Primary School Children at Selected Primary School of Ambala
Abstract: Oral health is an integral part of general health and is essential for well being. The 60–90% of school children worldwide has dental cavities. The oral health diseases are preventable by dental health education and behavioral modifications towards maintenance of oral health. The study was aimed to assess and evaluate the knowledge and oral health status of primary school children before and after the administration of puppet show regarding oral …
Published in Journal of Nursing Science & Practice · Vol. 4, Issue 2, 2014 · pp. 67–72 Read article
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A Conceptual study of Digestion wsr to digestion of Carbohydrate,Protein and Fat.
Abstract: In day today Modern era,Digestive disorders are becoming a very common disorder affecting large no of people. . Digestion is a multi stage process in the digestive system which start from ingestion of raw material in oral cavity,followed by various process such as mastication,deglutition,formation of bolus,formation of chyme ,followed by chemical conversion by the action of enzymes along with formation of various waste products. It should be further noted that …
Published in Journal of Nursing Science & Practice · Vol. 11, Issue 1, 2021 · pp. 44–50 Read article
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Alveolar Cysts in a Newborn Infant: A Case Report
Abstract: Cystic lesions of transient nature through Epstein pearls, Bohn’s nodules and dental lamina cysts are frequently found in the oral cavities of newborn infants. These cysts arise from the developing dental tissues or from their remnants. Alveolar cyst is also known as gingival cyst of newborn or dental lamina cyst. This cyst presents as a benign oral lesion which is whitish-yellow in color present on the alveolar ridge of newborns …
Published in Research and Reviews: A Journal of Dentistry · Vol. 8, Issue 3, 2017 · pp. 26–28 Read article
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Temperature Rise within the Pulp Chamber During Curing Resin based Composite By LED and QTH Light Curing Units: An In vitro Study
Abstract: The present study was undertaken to evaluate the change in temperature within the pulp space during curing of composite resins using light emitting diode (LED) and quartz tungsten halogen curing units (QTH) under varying remaining dentin thickness. 60 human mandibular molars were taken and distal root of each sample was resected and the thermocouple probe was placed in the roof of the pulp space. The root was immersed in a …
Published in Research and Reviews: A Journal of Dentistry · Vol. 3, Issue 3, 2012 · pp. 14–22 Read article
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Restoration of Carious Primary Molar Using Two Different Methods
Abstract: Management of dental caries in children using minimally invasive procedures has great importance. For this, various methods have been proposed such as chemo-mechanical methods for caries removal; Carisolv is one of them. The chemo-mechanical method of cavity preparation is considered to be less painful when compared to the traditional treatment method especially in children. In the present article is illustrated the case of a young girl in whom chemo-mechanical caries …
Published in Research and Reviews: A Journal of Dentistry · Vol. 5, Issue 1, 2014 · pp. 15–18 Read article
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Thermoplastic Resins: A Novel Approach to Removable Partial Dentures
Abstract: Behind all complexities in the world stand simple solutions. In the present era of fixed prosthetic dentistry cast partial dentures are still being used owing to the anatomical and biomechanical constraints in the oral cavity. The difficulties encountered by patients with cast partial denture are an age old saga. The common problems are unaesthetic appearance of the clasp, rigidity of denture base resin, unavoidable tooth preparation, weight of the prosthesis, …
Published in Research and Reviews: A Journal of Dentistry · Vol. 5, Issue 2, 2014 · pp. 3–8 Read article
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Internal Resorption in the Dentin-Pulpal Complex: An Etiological Link to the Metabolic Acidosis of Diabetes
Abstract: The etiology of internal resorption is not by bacteria or caries but most likely initiated from chronic pulpal inflammation (i.e., chronic pulpitis) following intrusive injury to the dental pulp by one or more of the following means: (1) Traumatic injury (i.e., the most likely etiology) which often involves the oral cavity and teeth. (2) Chemical injury may be by elevated dose fluoride use or from caustic products used in bleaching. …
Published in Research and Reviews: A Journal of Dentistry · Vol. 6, Issue 2, 2015 · pp. 1–6 Read article
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Granuloma Pediculatum Benignum: A Case Report and Review of Literature
Abstract: Pyogenic granuloma or granuloma pyogenicum represents about 57% of benign non-neoplastic oral lesions. Pyogenic granuloma of the oral cavity is known to most commonly involve gingiva. Extragingivally, it can occur on the lips, tongue, buccal mucosa and palate. The etiology of the lesion is not known, though it was originally believed to be a botryomycotic infection. It is theorized that pyogenic granuloma possibly originates as a response of tissues to …
Published in Research and Reviews: A Journal of Dentistry · Vol. 4, Issue 1, 2013 · pp. 1–4 Read article