Essays on Rotating

A magneto is small generator formed from a permanent magnet, which uses electricity to give outputs such as pulses of high voltage. A magneto has a transformer, switch and distributor, which give alternating current the direction to the plug that produces sparks. Timing in magneto is the interval in which the breaking point occurs after producing the sparks. Therefore, the purpose of magneto timing is to actualize high voltage used to produce sparks at the right time. It is achieved through the internal and external timing. Internal timing takes place mechanically on a bench. There are two adjustments in ...

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Neutron Stars: The ‘Death’ of a Death Star

Introduction: Neutron stars are dense, compact masses of subatomic particles (called ‘fermions’) compressed by great gravitational forces (Reisenegger 1). They are classified into three groups: the radio pulsars, which are rotating neutron stars that are predictable pulsators of radio waves due to its fast (Landau n. p.; Reisenegger 2) although sometimes slow (Fuller, et al. 1) rotation; magnetars, which neutron stars with the strongest magnetic fields in the universe and violently burst high-energy X-ray and gamma rays (Landau n. p.); nonrotating binary neutron stars, which are emitters of x-rays (Reisenegger 3); and PSR ...

Three phase induction motors

Introduction The three-phase induction machine is the most widely used among the rotating machines. An induction machine offers an almost constant speed within its normal operating range when operated off a constant-voltage, constant-frequency, and with the electric power source. The cost of purchasing these machines is very low, and they require little maintenance. However, speed control is difficult and very expensive. Therefore, the rotor current of the three phase induction motors is not induced by electrical connections, but rather the rotation of magnetic field.

Squirrel Cage Rotor construction

The rotor type of the motor is made up of a laminated core which is ...

Introduction:

Nanobiotechnology serves as an imperative technique in the development of clean, nontoxic, and eco-friendly procedures for the synthesis and congregation of metal NPs having the intrinsic ability to reduce metals by specific metabolic pathways. Silver nanoparticles are particularly interesting nanoscale systems due to the ease with which they can be synthesised and modified chemically. Synthesis of silver nanoparticles has been widely researched due to their interesting size and shape-dependent properties [26]. These novel properties can be tailored by controlling their size, shape, composition, structure and crystallinity. Due to their size features and advantages over available anti-microbial properties, chemical imaging ...

Frank Lloyd Wright’s Home and Studio remain the finest specimen of the architect’s innovative approach to the design of buildings in general and spaces for living in particular. The house is located in Oak Park, Illinois in a historic neighborhood which was later adorned by a number of other Wright’s houses representative of his unique style. While construction began in 1889 as soon as the architect married Catherine Tobin, the building was reconstructed and expanded for the next twenty years to arrive at the form one can see nowadays, restored by the Frank Lloyd Wright Trust. ...

Abstract

The current human capital task force constitutes of an increased number of female workers. What is notable is that as much as the female workers are playing a part in the development of their countries and their selves, certain conditions in the workplace seem to weigh a toll on their family lives. In this sense, fertility issues come into play, and it is often attributed to the erratic working conditions that female workers are subjected. This is a concerning trend given that irregularities that arise from their work patterns may limit their chances of becoming parents this is as ...

Abstract

Team based approach is considered to be one of the main concepts that may lead to positive developments in an organization such as increased productivity, high levels of efficiency in operations and reduction in the cost of operations. The San Francisco General Hospital is contemplating to use the team based approach in order to attain these objectives. Therefore, the organization has to embrace specific training programs such as on the job training technique, the instruction training technique and the job rotation techniques. Despite these techniques being associated with different training issues, effective measures can be put in place to ...

Windmills have been widely used since thousands of years to pump water for agricultural purposes, propel ships and grind grains. As civilizations advanced, other convenient sources of energy replaced wind energy. Currently, fossil fuels that include coal, oil and natural gas fulfill the energy needs of nations across the world. These fuel sources are responsible for polluting the environment through the emission of hydrocarbons that cause global warming and various other environmental hazards. Also, these non-renewable energy sources are much limited and continue to deplete from the face of the earth. Therefore, wind energy that can be tapped conveniently ...

Introduction

Human resource management is an important part of the organization since it determines the productivity of employees, their quality of output, and eventually customer satisfaction. It involves the identification of talents and selection of the most valuable talents to the organization. The organization is responsible for utilizing these skills through clear job designs that specify the job of every individual. The organizational structure determines the relationship between employees at various levels and determines efficiency in performing various tasks (Gilmore & Williams, 2009 p.56). New Dunkin Donuts stores demand a clear plan of their operation and management. Human resources are crucial ...

Introduction

Taking measurements may require the conversion of the measured quantity to electrical quantity. Transducers are devices or elements that perform this function by transforming physical quantities such as quantities like sound, light, or temperature into electrical signals like current, voltage, or capacity. Transducers consist of inputs, sensing elements, transduction elements, signal processing, and electrical outputs. The inputs known as the measurands are the quantities, states, or properties that are to be translated into electrical outputs. The sensing elements accurately measure these input energies and sends the information to the transduction elements to be transformed into the desired form. The ...

a)SimpliMet 1000

Introduction

The SimpliMet 1000 machine is an automatic Mounting Press is a very new and versatile mounting press machine. This machine features electrohydraulic and also dual temperature controls which occur over a wide range of the mounting pressures. These machines are designed to allow for easy and quick preparation of the samples. The SimpliMet 1000 machine also increases the consistency of the specimen over the process of manual pressing.

Aim

The major aim of using the SimpliMet 1000 machine is to easily and quickly prepare consistent samples. Description of apparatus The SimpliMet 1000 machine is a very simple ...

Abstract

A rotary engine is one of the ancient internal-combustion engines ever used. These type of engines were designed with an odd number of cylinder per row in a radial configuration. The crack shaft remained stationary throughout the operation. One advantage of this kind of engine is that it is a simple engine that utilizes less moving components. On the other hand, a piston engine or a reciprocating engine is a heat engine that uses one or several reciprocating pistons. The piston engine converts pressure into a rotating motion. A piston engine has the capability to seal the gap in ...

Psychology

In a study published in the Journal of Verbal Learning and Verbal Behavior, researchers worked on the importance of the prior knowledge before facing the present situations or conditions (Bransford, and Marcia K Johnson 717). Research shows that subjects usually develop semantic thoughts joining the present information and prior knowledge. Therefore, researchers studied the role of prior knowledge and its importance in comprehending the present information. They were trying to show that prior knowledge is not only involved in comprehension but is also necessary for the meaningful information. They also studied the effect of prior knowledge on subjects by ...

I. Introduction Advances in recombinant DNA technology and bioinformatics-based data analysis have driven the explosion of structural biology in the last two decades (Kelly, Jess, and Price 119). This has resulted to the identification of at least 2000 proteins annually and a growing need in performing structural studies in these new proteins. The current trend involves the concern of analyzing protein structures close to its natural conditions (and other conditions) and of measuring their rates of structural changes, an essential factor in their biological functions. The technique of circular dichroism (CD) has gained an increasing popularity in addressing these ...

Introduction

Energy is a key driver of any nation’s economy. The extent to which it contributes to the performance of all activities surrounding the human life is beyond measure. This is because energy contributes almost fully to the economic development of the economy. In its physical form, energy is classified either as renewable or non-renewable. Renewable energy forms the green energy that can be reused again and is less toxic to the environment. On the other hand, non-renewable energy is exploited once it’s used and mostly pollutes the environment. All this energy forms can be either used directly ...

Report of Wind Energy

Rights of nature are things that nature should have. In simple terms, these are some of the things that the human being should do on the earth without the affecting the environment negatively. This kind of ‘rights’ should be implemented to help and the current alarming a rate of devastation. There are several factors that affect the nature of the environment. These include; global warming, the industrial revolution, among others. They are the negative impacts on the environment that violates the rights of nature. Global warming is an occurrence that is caused by the excess carbon dioxide in the ...

Introduction

With the increasingly expanding size of the warehouses, libraries and other storage facilities, and the rising number of items that need to be stored, organized, kept account of and retrieved on a regular basis, the question of optimizing storage space and speeding up the process of placing and retrieving items in the storage is very relevant. Nowadays this task is often delegated to the automated storage and retrieval system (ASRS), which can handle items of various sizes and weights: from heavy pallet loads in the large warehouses to a single book in a library.

Definition

Automated storage and retrieval system ...

Abstract

Permanent magnet synchronous motors (PMSM) are a type of motors that have permanent magnets mounted on the rotors instead of the rotor windings. This particular design gives the motor a few advantages over ordinary induction synchronous motors. The magnets attached to the rotor do not require excitation, which reduces the power consumption in PMSM. This gives the motor high operational efficiency and reduces the motor active diameter. PMSM are therefore associated with applications that require high torque but have limited operation space. The permanent magnets suffer from flux leakage and are therefore aligned in a pattern that minimizes flux ...

Introduction

The fundamental process of thermal power plants is based on the conversion of thermal energy into mechanical energy and, subsequently, into electric power, using steam as the working fluid. According to the U.S. Energy Information System, over 67% of the electrical energy in the United States is generated through thermoelectric power plants, which use the combustion of fossil fuels such as natural gas, coal and petroleum to generate the steam necessary for the process; moreover, thermoelectric power generation accounts for an approximate 80% of all the power generation worldwide. Thus, the electricity consumed in most homes and industries is ...

Introduction

This proposal is about the physics of microwave oven. This includes the interaction of microwaves with metals and the generation of microwaves in magnetrons. The reason for choosing a microwave oven is because they are used common places like in homes and restaurants for warming food. A microwave is a wave that belongs the class of electromagnetic waves. They have frequencies ranging from 300 MHz to 300GHz and wavelengths ranging from 1 m to 1mm. (Bradshaw, Van & Swardt, 201)

Physics of the Microwave

A typical microwave oven consists of the magnetron, fan, power supply, waveguide, turntable and a base plate. The microwaves are ...

This video highlights the development of theory of interaction of electricity with magnetism. A number of scientists were involved in understanding, interpreting and validating electromagnetism with simple experiments involving current and magnetic elements. During September 1820, Ampere investigated magnetic effects of repulsion/attraction between like/unlike poles. He developed theory of electro-dynamics related to magnetism as interaction of current elements. Laplace was skeptical of his ideas while some other scientists like Fernel started thinking on converse patterns. Some other scientists like Jean Fernel focused on theory of production of electricity by magnetism and production of currents in conducting metals. Jean Fernel ...

1. Introduction

Computer hard disk drives are storage devices for digital data. The digital data is stored on high-speed rotating magnetic surfaces. They are non-volatile and use the random access technique to access data stored on them. It consists of fast rotating discs which have magnetic surfaces onto which data is stored. They are permanently mounted on the computers and cannot be easily detached like floppy disks. It is known as hard disk drive as both the disk and the drive are contained inside the same unit. The costs of hard disk drives have fallen in the last few years and ...

Introduction

The beginning of the concept of aviation began in Chinese in the fourth century A.D. In 400 B.C a toy that consisted of feathers at the end of a stick was spun between the hands to generate a lift and after its release it provided a free flight, It is assumed that those who build the toys were inspired by the auto rotating nature of seeds from trees such as Sycamore. 1

In the year 1480, Leonard da Vinci discovered that a screw shaped device well made from a starched linen can rise in air if turned quickly.

Biography of Leonard da Vinci

He was born on April ...