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Look at the Dark

Look at the Dark

Performance Evaluation of Fiber Bragg Grating Temperature Sensor

In this work, different FBG temperature sensors are simulated and evaluated with various apodization profiles. A New apodization function is proposed with a remarkable performance compared even with the Gaussian profile. Also, and for the first time, we introduce the Nuttall apodization profile with detailed analysis. Evaluation is done under a wide range of controlling design parameters like sensor length and refractive index modulation amplitude, targeting a remarkable temperature sensing performance. New judgment techniques are introduced such as apodization window roll-off rate, asymptotic sidelobe decay level, number of sidelobes, average sidelobe level and channel isolation. Evaluation techniques like reflectivity, Full Width at Half Maximum (FWHM), and Sidelobe Suppression Ratio are also used. A study is performed on including an unapodized sensor among apodized sensors in a quasi-distributed sensing system. The obtained results demonstrated the importance of investigating the…

1996 National Economic Review (Windows)

1996 National Economic Review (Windows)

What is a Number? Mathematical Concepts and Their Origins

What is a Number? Mathematical Concepts and Their Origins

Современные и перспективные информационные ГНСС-технологии в задачах высокоточной навигации

Монография посвящена проблемам высокоточной навигации на основе информационных ГНСС-технологий с использованием ГЛОНАСС. Приведены сведения о современном эфемеридном и частотно-временном обеспечении ГЛОНАСС, а также данные, характеризующие основные направления совершенствования этой системы на основе использования беззапросных и межспутниковых измерений, в том числе математические модели таких измерений. Обсуждаются некоторые аспекты повышения автономности функционирования ГЛОНАСС. Приведены решения перспективных навигационных задач на основе ГНСС-технологий применительно к космическим аппаратам на геостационарной и высокоэллиптической орбитах, высокоскоростному аэробаллистическому летательному аппарату с большим аэродинамическим качеством, а также при выведении полезной нагрузки на ГСО с помощью двигателя малой тяги. Для специалистов, научных работников, аспирантов и студентов, специализирующихся в предметной области, связанной с информационными ГНСС-технологиями.

Crossings – Mexican Immigration in Interdisciplinary Perspectives (Paper)

Crossings – Mexican Immigration in Interdisciplinary Perspectives (Paper)

Use of Auger Electron Spectroscopy to study an industrial process

Surface hardening techniques are of importance for all practical applications where a hard surface is needed to resist wear, along with a tough substrate to resist the impact that occurs during operation. The advantages of the gaseous nitriding applied to iron/steel are nowadays widely recognised. The objective of the present work is to find a method to control the growth kinetics of the nitrided layers on different types of steels, in an industrial furnace. In order to study the kinetics of the nitrided layer growth, it is vital that the amount of nitrogen can be measured as well at the surface as in the nitrided layers. In the present work, Auger Electron Spectroscopy (AES) applied to a cross section of the surface layer is put forward as the most appropriate technique for this purpose thanks to its high lateral resolution. Hence, the second objective of this work is to investigate the possibilities to characterise the nitrogen distribution in the nitrided layers using AES. This…

Studies on Bastard Myrobalan

Terminalia bellerica Roxb., The Bastard Myrobalan, (Thanni in Malayalam and Vibhitaka in Sanskrit) is one of the most commonly used plants in Indian traditional system of medicine. Terminalia bellerica is one of the constituents of Triphala (Terminalia bellerica, Terminalia chebula and Emblica officinalis), the most common formula used in traditional Ayurvedic medicine. The plant belongs to the family Combretaceae. It is a large deciduous tree, 10- 20m high. Bark is ashy grey with fine longitudinal crack. Leaves gathered about the extremities of the branches and have long petioles. It is highly prized medicine. The plant parts of Terminalia bellerica especially fruit rind is a highly valuable herbal resource which can be used commercially for the preparation of anti cancerous and antimicrobial drugs, after conducting a thorough evaluation of the chemical compounds present in it.

Interior Lighting for Environmental Designers

Interior Lighting for Environmental Designers

Countering Fraud for Competitive Advantage – The Professional Approach to Reducing the Last Great Hidden Cost

Countering Fraud for Competitive Advantage – The Professional Approach to Reducing the Last Great Hidden Cost