Off Axis Optics
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The document discusses the grinding and polishing of large off-axis aspheric optics, which is challenging due to the lack of an axis of symmetry. The tool used for this task incorporated 18 servo motors and load cells to provide closed-loop force control to deform a 2-inch thick aluminum shell and match the changing surface of the optic as three servo motor-controlled linear actuators moved the tool across it. An additional pneumatic cylinder provided vertical load control for lightweight optics.
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The electromagnetic force is used to counteract the effects of gravitation. But it has also been proved that it is not possible to levitate using static, macroscopic, `classical' electromagnetic fields.
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Several possibilities exist to make levitation viable.
It is possible to levitate superconductors and other diamagnetic materials, which magnetise in the opposite sense to a magnetic field in which they are placed.
A superconductor is perfectly diamagnetic which means it expels a magnetic field (Meissner-Ochsenfeld effect). Other diamagnetic materials are commonplace and can also be levitated in a magnetic field if it is strong enough.Diamagnetism is a very weak form of magnetism that is only exhibited in the presence of an external magnetic field.
The induced magnetic moment is very small and in a direction opposite to that of the applied field. When placed between the poles of a strong electromagnet, diamagnetic materials are attracted towards regions where the magnetic field is weak.
Diamagnetism can be used to levitate light pieces of pyrolytic graphite or bismuth above a moderately strong permanent magnet. As water is predominantly diamagnetic, this property has been used to levitate water droplets and even live animals, such as a grasshopper and a frog.
Superconductors are perfect diamagnets and when placed in an external magnetic field expel the field lines from their interiors (better than a diamagnet). The magnet is held at a fixed distance from the superconductor or vice versa. This is the principle in place behind EDS (electrodynamic suspension) maglev trains. The EDS system relies on superconducting magnets.
A maglev is a train, which is suspended in air above the track, and propelled forward using magnetism. Because of the lack of physical contact between the track and vehicle, the only friction is that between the carriages and air. So maglev trains can travel at very high speeds (650 km/h) with reasonable energy consumption and noise levels
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The document discusses the history, construction, types, working principle, merits and demerits of DC motors. It traces the origins of DC motors back to Michael Faraday's work in the 1830s. It describes the key components of a DC motor including the field poles, frame, armature, commutator and brushes. It also discusses the different types of DC motors like shunt, series and compound motors. Finally, it provides the working principle and highlights the merits like high starting torque and speed control capabilities, and demerits such as high costs.
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This document summarizes an action research project analyzing effective technology use in the classroom. Surveys, interviews, and observations of teachers at Grassy Pond Elementary School found that younger teachers were more comfortable using technology, while veteran teachers relied more on traditional methods. Data also showed that teachers felt they needed more training to effectively integrate technology. Students were more engaged when using devices like iPads throughout the day. Based on these findings, the school plans to provide more ongoing technology training for teachers and purchase additional devices to have one-to-one access for students.
T ratio using MS Excel
The document discusses how to add a t-test button to the Excel main menu bar to perform t-tests. It provides steps to add the Analysis ToolPak add-in, which will make the t-test options available. It then outlines the steps to run independent and paired t-tests, including selecting the data, choosing the appropriate t-test, and interpreting the output values such as the means, correlation, and t-value.
Staff Incluson and Equality Training 2015
This document provides an introduction and overview for an equality training session for teachers at Trafalgar Junior School. It discusses the importance of addressing discrimination and inequality in schools, highlighting statistics around disproportionate exclusion rates faced by certain groups. Examples are given to illustrate how discrimination can negatively impact students throughout their lives. The training aims to help teachers reflect on their own knowledge and potential gaps, and provides activities for teachers to discuss current good practices as well as concerns around addressing issues of equality and diversity. An equality review matrix is introduced to help structure planning and consideration of these issues on an ongoing basis.
Educação em valores necessidade ou obrigação
Este documento discute a educação em valores como uma preocupação central para a formação de professores e o desenvolvimento de alunos. Preconiza-se uma metodologia de equilíbrio entre doutrinação e clarificação para o processo de aquisição de valores pelos alunos, envolvendo interação entre professores, alunos e pais. Defende-se que o processo de valoração deve ocorrer em todas as áreas curriculares para que a comunidade escolar conheça e assuma os valores desejados.
Treatmnt plng/prosthodontic courses
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Posterior teeth selection/prosthodontic courses
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Nasoalveolar moulding /certified fixed orthodontic courses by Indian dental a...
Nasoalveolar moulding /certified fixed orthodontic courses by Indian dental a...Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
0091-9248678078
Электрическая многоярусная хлебопекарная печь MATADOR MDE bsc30 / bsc40 / ba ...
Электрическая многоярусная хлебопекарная печь MATADOR MDE bsc30 / bsc40 / ba ...Agro-Service - комплексное сопровождение предприятий пищевой промышленности
Тестовое описание документации. Да получения полной версии направьте запрос на nikolaev-av@mail.ru или на сайте www.agro-serv.ru
Электрическая многоярусная хлебопекарная печь MATADOR MDE bsc30 / bsc40 / ba werner pfleiderer horstmann group (#33)Хлеборезательная машина «АГРО СЛАЙСЕР» / ХРМ11-00.00.000 ПС / ХРМ21-00.00.000...
Хлеборезательная машина «АГРО СЛАЙСЕР» / ХРМ11-00.00.000 ПС / ХРМ21-00.00.000...Agro-Service - комплексное сопровождение предприятий пищевой промышленности
Тестовое описание документации. Да получения полной версии направьте запрос на nikolaev-av@mail.ruГазовая печь / RotorBakeT8 Series (#10)
Газовая печь / RotorBakeT8 Series (#10)Agro-Service - комплексное сопровождение предприятий пищевой промышленности
This document provides installation and user instructions for a gas oven with a rotating rack for baking bread and pastries. It includes sections on unloading, placement, electrical and gas connections, operation of the control panel, cleaning and maintenance, troubleshooting, and spare parts. The oven has multiple electronic control panel models with 10 or 100 preset baking programs to choose from. Proper installation and use are necessary for safe operation.Major connector In prosthodontics
This document discusses major connectors, which connect the components on one side of a dental arch to the other side. It describes the different types of major connectors for the maxilla, including palatal bars, straps, double palatal bars, horseshoe connectors, closed horseshoe connectors, and complete palates. The functions, advantages, disadvantages, and indications for use of each type are explained in detail.
Finishing and polishing of cast metal framework/prosthodontic courses
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Recursos tecnológicos para el aprendizaje
Este documento describe varios recursos tecnológicos para el aprendizaje, incluyendo presentaciones multimedia, videos, pizarras digitales, portátiles, dispositivos móviles y herramientas digitales. Explica cómo estas herramientas pueden usarse para mejorar la educación al hacerla más interactiva, colaborativa y accesible fuera del aula.
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