MANAGING Essay Example | Topics and Well Written Essays - 2750 words

MANAGING - Essay Example The human resource management as a research field describes and deals with the organizational human capital. Wherever, humans are involved, there will be power politics present as well. In this way, the philosophy of postmodernism defines organizations as a setup that is a social entity, and it remains subjected to political forces as well (Jordan & Troth, 2004). The sub-concept of power roles emerged because organizations are powerhouses, and therefore, somebody has to house the power. The operational power of getting things done resides with the middle managers, and the top ones have to operate through them in order to keep moving the organization forwards in strategic terms. The humans have a propensity to watch their self-interest as well. The managers create problems by choosing strategies that cause them to face least amount of pain and struggle. They do not necessarily safeguard and look after the interests of the shareholders that is the prime purpose of their existence (Solansky, 2008). The literature of management calls the abovementioned phenomenon as the agency problem. The agency problem manifests itself when agents do not serve the objectives of their principles. The managers are agents of the shareholders of a specific company, but the former group has to assist the latter one in the process of attaining the goals. The corporate world operates in order to provide dividends to the investors, and the organisations also provide capital gains to the shareholders by increasing the market demand of their shares. The agency problems originates when managers have a belief that they can get away with committing fraud with the investors. The employees develop the tendency to skip and avoid their responsibilities because they might be experiencing psychological contract breach. They attempt to balance out their professional efforts with their current

Baroque Era :: essays research papers

In every way Baroque music is like a teen-ager. Ok, maybe not in the pimply-faced-criticize-everything-even-though-you-don’t-pay-for-it kind of way we have come to expect from our modern teen-agers. But what is a teen-ager anyway? Simply put; a teen-ager is no longer a child and not yet an adult. It is that awkward in-between stage when all the rules get broken, nothing ever seems to fit, and emotions fluctuate wildly. This is exactly how it was with the Baroque Era of Music. To put this into perspective, try and remember that the Renaissance was a "re-birth" of good art and music and the Classical era was that birth coming into its maturity. The Baroque Era—which happened to come directly after the Renaissance and before the Classical Era—coincided nicely with those awkward and highly emotional teenage years that everyone goes through on the pathway called growing up. When Was the Baroque Era? The official company line on when the Baroque Era started, which you will find in every book, encyclopedia, or bubble-gum wrapper on the subject, was the year 1600. The event which earned 1600 this enviable distinction, as far as I can tell, was the simple fact that it has two zeros stuck on the end of it, thus making it fairly easy to remember. In contrast, the end of the Baroque Era was definitively set by Johann Sebastian Bach, the Grand-Poobah of Baroque music, who had the good foresight to die in a year also ending with a zero, thus giving historians another easy to remember date; 1750. For some Baroque zealots Bach’s death was truly the day that music died†¦ at least it gave good closure. The Origins of Baroque Music In the spirit of rebellious teenagers everywhere, I’m going to throw caution (and facts) to the wind and talk about eunuchs. As you may know, eunuchs are guys who--for lack of a better term--are missing an organ. (Bach was a master organ player, but that has absolutely nothing to do with this) Medieval doctors had learned that if the--men, brace yourself--"family jewels" were cut off of boys at an early age, none of the traditional biological changes of puberty would occur. There would be no facial or body hair, their voices would not change, and all their acne problems would be virtually solved. Now, in my mind, that in NO WAY could compensate for the loss of everything that makes life worth living, but apparently back at the turn of the century (the 15th Century, I mean) being a eunuch was not as uncommon as one might think.

Year 11 Physics: the World Communicates Dot Points

The World Communicates 1. The wave model can be used to explain how current technologies transfer information * describe the energy transformations required in one of the following: mobile telephone, fax/ modem, radio and television Energy transmission in mobile telephone: ound wave energy (input sound) -> electrical (in transmitting phone) – > radio wave (transmit signal) -> electrical (in receiving phone) -> sound (output sound) * describe waves as a transfer of energy disturbance that may occur in one, two or three dimensions, depending on the nature of the wave and the medium A wave is a travelling disturbance which transfers energy without transporting matter. They may occur in 1D, 2D or 3D, depending on the nature of the wave and the medium. D- slinky, laser light >>> only moves in one direction 2D- water wave >>> propagates in all directions on a single plane 3D-light, sound, all EM waves >>> spreads/ radiates in all directions fro m a single point *identify that mechanical waves require a medium for propagation while electromagnetic waves do not Mechanical waves require a medium (particles in order to propagate) while electromagnetic waves do not. Classification of Waves: in terms of medium > mechanical (requires), electromagnetic (doesn’t require) -in terms of particle oscillation > mechanical >>> transverse (perpendicular), longitudinal (parallel) * define and apply the following terms to the wave model: medium, displacement, amplitude, period, compression, rarefaction, crest, trough, transverse waves, longitudinal waves, frequency, wavelength, velocity Mechanical Waves -require a medium to propagate -involves the transfer of energy through a medium by the motion of particles of the medium itself -particles moves as oscillations or vibrations around a fixed pointTransverse waves (e. g. light) – mechanical waves – particles of the medium oscillate back and forth in a direc tion perpendicular to the direction of wave propagation -does not require a medium Longitudinal/compressional waves (e. g. sound) -mechanical waves -particles of the medium oscillate back and forth in a direction parallel to the direction of propagation -requires a medium Period (T) – time taken for a single wave to pass through a fixed point OR the time taken for a particle of a medium to make one complete oscillation (measured in seconds) -T = 1fFrequency (f) – number of waves that pass through a fixed point per second OR number of complete oscillations of a medium particle in one second (measured in hertz > Hz) Medium – material through which a wave can propagate Displacement-shortest distance from initial position to final position of a particle Amplitude (A) – maximum displacement of particles from the undisturbed state (equilibrium position) Compression – zones where particles are closer together than in their undisturbed state Rarefaction – zones where the particles are further apart than in their undisturbed state Crest- highest part of the wavesTrough- lowest part of the wave Wavelength (? ) – distance between 2 successive identical points on a wave (e. g. distance measured in metres, between adjacent crests or troughs) Velocity (v) – speed at which the wave transfers energy away from the source * describe the relationship between particle motion and the direction of energy propagation in transverse and longitudinal waves Particles in a transverse wave oscillate back and forth in direction perpendicular to direction of propagation.Particles in a longitudinal wave oscillate back and forth in direction parallel to direction of propagation. * quantify the relationship between velocity, frequency and wavelength for a wave: Velocity is directly proportional to the product of the frequency and wavelength of the wave. 2. Features of a wave model can be used to account for the properties of sound * id entify that sound waves are vibrations or oscillations of particles in a medium Sound Waves -are vibrations or oscillations of particles in a medium classed as a mechanical longitudinal wave -when sound wave propagates, vibrations of the particles create pressure variations within that medium -frequency of a sound is determined by the frequency of the original vibration,NOT by the medium it travels through (i. e. frequency of a sound doesn’t change through any medium) -speed of sound is different in different media -sound travels fastest in solids, followed by liquids then gases (i. e. higher density- particles packed more closely together- vibrations travel faster) -speed of sound in air = 343 m/s relate compressions and rarefactions of sound waves to the crests and troughs of transverse waves used to represent them Compressions > crests Rarefactions > troughs * explain qualitatively that pitch is related to frequency and volume to amplitude of sound waves The amplitud e of a sound wave determines the volume of the sound. high amplitude = high volumelow amplitude=low volume Likewise, the frequency of a sound wave is directly related to the pitch of a sound. The higher the frequency, the more vibrations per second, and thus, the higher the pitch.High frequency= high pitchlow frequency=low pitch * explain an echo as a reflection of a sound wave Echo – forms when a sound wave reflects off a hard surface and rebounds back to its original source, essentially becoming the reflection of a sound wave. – wide variety of applications including SONAR (Sound Navigation And Ranging) > method for finding the depth of water and detection of animals and other objects in water * describe the principle of superposition and compare the resulting waves to the original waves in sound Superposition- also known as wave interference when two or more waves of the same type pass through the same medium at the same time, they will interfere with each other -individual component waves will interfere to give the resultant wave -position of any point on the resultant wave is the sum of the amplitudes of the component waves -rules to superimpose component waves: 1. End points 2. Intersecting points 3. Crests/ Troughs -note: > curve + curve = curve gt; curve + line = curve > line + line = line > once component waves no longer interfere with each other, they will return to their initial state -constructive interference > component waves are in phase (crests and troughs aligned) -destructive interference > component waves 180? out of phase (crests of one wave aligned to troughs of the other and vice versa) > resultant wave is a straight line 3.Recent technological developments have allowed greater use of the electromagnetic spectrum * describe electromagnetic waves in terms of their speed in space and their lack of requirement of a medium for propagation Electromagnetic Waves – travel through space at the speed of li ght, 3Ãâ€"10? m/s. – do not require a medium to propagate (i. e. can pass through a vacuum, are all transverse waves) – e. g. gamma rays, X-rays, ultraviolet, visible (VIBGYOR), infrared, microwaves, radio waves * identify the lectromagnetic wavebands filtered out by the atmosphere, especially UV, X-rays and gamma rays Waves able to penetrate atmosphere and reach surface of the Earth> visible light, radio waves, microwaves -too much exposure to UV radiation can result in cancers and dangerous mutations -too much exposure to X-rays and Gamma radiation would quickly kill us -Earth’s atmosphere has the ability to absorb ay incoming high energy radiation * identify methods for the detection of various wavebands in the electromagnetic spectrum EM Wave| Detectors| Source|Gamma| Geiger Muller tube| Nuclei of radioactive atoms and cosmic rays| X-ray| Fluorescent screen| X-ray tubes| Ultraviolet (UV)| Photo/solar cellsFluorescent chemicals| Very hot objectsArcs and s parksMercury capour lamps| Visible| Photo/ solar cellsEye| Hot objectsLampsLasers| Infrared| Special photographic filmSkinSemiconductor devices such as LDR and photodiode| Warm and hot objects (e. g. ire, people)| Radio/ Microwaves| Aerials connected to tuned electric circuits in radio and TV sets| Microwaves and ovensTV and radio transmitters using electric circuits and aerialsOscillating electrons| Note: the sun is a producer of all EM waves sending all bandwidths to Earth Photographic film detects all EM waves except for radio/ microwaves * where k = amount of energy of source, d = distance away from source, I= intensity explain that the relationship between the intensity of electromagnetic radiation and distance from a source is an example of the inverse square law:Intensity – the energy received per square metre per second at a distance away from the source Attenuation – decrease in the strength of the signal or light -EM waves decrease in intensity the further th ey are away from the source – to reduce attenuation in long distance communication, signal needs to be either: > sent out as a very large strong signal > signals travelling long distances need to be amplified at repeater or booster stations along their path * outline how the modulation of mplitude or frequency of visible light, microwaves and/or radio waves can be used to transmit information Bandwidth – space taken up in terms of frequency Modulation – process of adding (encoding) signal information to an EM wave Amplitude Modulation -signal wave encoded onto carrier wave by adding amplitude of signal wave and carrier waves using principle of superposition -turns into resultant modulated wave -information stored in variations of amplitude -constant frequency, changing amplitudes when received, radio receiver will decode variation in amplitude to obtain original signal, which is then amplified Advantages| Disadvantages| * requires a much smaller bandwidth of frequencies for transmission * number of transmissions possible in the AM band is larger| * depend on changing of amplitude through superposition of waves and therefore e very prone to interference |Frequency Modulation -signal wave added to carrier waves by changing frequency of carrier wave -information stored in variations of frequency -constant amplitude, changing frequencies low signal corresponds to low frequency and vice versa for high signals Note: frequency bands = megahertz (MHz)= _x10^6 m/s Advantages| Disadvantages| * since FM waves store information on varying frequencies, less prone to interference -harder to influence frequency of a wave by interference and superposition| * each transmission utilises a large bandwidth * different transmitters must be allocated different frequency bands for transmission to avoide interference with each other * limited number of transmitters allowable in given area| discuss problems produced by the limited range of the electromagneti c spectrum available for communication purposes -each transmission requires different frequency bands, but available bandwidth for certain types of EM waves is limited so there’s a possibility may run out of bandwidth and have transmissions start interfering with each other 4. Many communication technologies use applications of reflection and refraction of electromagnetic waves * describe and apply the law of reflection and explain the effect of reflection from a plane surface on waves Reflection – When a wave strikes a boundary, it bounces back.This is known as the reflection of a wave. Law of Reflection: – angle of incidence is equal to the angle of reflection – incident ray, reflected ray and the normal are on the same plane * describe ways in which applications of reflection of light, radio waves and microwaves have assisted in information transfer Light > fibre optic communcation Radio waves > AM/ FM radio transmission Microwaves > microwave repeating stations (to boost intensity of received signals through use of parabolic concave surface of satellite dishes) > mobile phone, internet cable data describe one application of reflection for each of the following: plane surfaces, concave surfaces, convex surfaces, radio waves being reflected by the ionosphere Plane > dressing and shaving Parabolic concave > satellite dishes (to reflect incoming signals to an antenna at the focus, hence amplifying signal), used in microwave repeating stations and radar control towers to boost intensity of received signals) >produce parallel beams of light used in torches, car headlight, etc Convex > shop security mirrors and side view mirrors (provides wider range of view) Radio waves reflected by ionosphereIonosphere – region of Earth’s atmosphere which consists of charged particles (electrons and ions) -charged property allows it to reflect low frequency (high wavelength) EM waves such as radio waves -this ref lection property enables the transmission of radio waves to receivers that are ‘out of sight’ due to the Earth’s curvature * explain that refraction is related to the velocities of a wave in different media and outline how this may result in the bending of a wavefront Wavefront – a line that joins all the point that are in phase in a wave (e. . a line that joins all crests, so is perpendicular to direction of propagation) Refraction – when waves travel from one medium to another, where they experience a change in speed, travel different distances (for the same interval of time), causing its wavefronts to bend. This changes the direction of propagation of the wave. Exception – when wave hits boundary between the two media at right angles, incident wavefronts are parallel to boundary, or incident angle is 0? -wavelength and velocity change -frequency remains the sameWhen a wave travels from a more dense to a less dense medium, direction of wave bends away from the normal and vice versa. Note: deep water is less dense than shallow water * define refractive index in terms of changes in the velocity of a wave in passing from one medium to another Refractive Index – the absolute refractive index of a material is a ratio of the speed of light in a vacuum to the speed of light in the material RI = cv , where c is the speed of light, and v is the speed of light in material It is the change in velocity of a wave passing from one medium to another. related to optical density (i. e. high RI = high OD and vice versa) * define Snell’s Law: = = n? n? * identify the conditions necessary for total internal reflection with reference to the critical angle Total internal reflection occurs when the incidence angle is greater than the critical angle. * i. e. boundary totally reflects the waves, hence the wave never escapes the medium it is in Critical angle: – wave travelling from more dense to less dense – angle of incidence forms an angle of reflection of 90? the critical angle) * outline how total internal reflection is used in optical fibres Fibre-Optic Communication – optic fibres made of glass or plastic materials -An optical fibre consists of a core (made of material with higher RI/ is more optically dense) and a cladding – Light encoded with data is guided along the length of the fibre via total internal reflection until it reaches the other end where the information is extracted and decoded Advantages| How/ Why| large amount of data can be transmitted at any one time * suitable for transmitting information where straight line transmission is impossible * interferences by outside disturbances are minimised since light waves are confined within fibres * energy lost due to long distance transmission minimised| * by using a group of many fibres * light waves only travel in straight lines * light waves are confined within fibres * energy of light waves totally trapped with in core of fibres| . Electromagnetic waves have potential for future communication technologies and data storage technologies * identify types of communication data that are stored or transmitted in digital form * fibre optic communication * AM/FM radio broadcasting * mobile telephone calls * satellite communication

ParkinsonS Disease, Also Known As Pd, Shaking Palsy, And

Parkinson s disease, also known as PD, shaking palsy, and paralysis agitans is an idiopathic neurodegenerative disorder; it rises from an unknown cause and increases in severity over time (Ronken). The disease was named after English physician James Parkinson, who first described it in 1817 (Weiner). PD can be defined as the degeneration of neurons in the substantia nigra, which is the area of the brain that contains dopamine cells and regulates movement. As the degeneration of neurons occurs, the brain loses the ability to generate body movement, which leads to the characteristic symptoms of PD (Weiner). The disease affects approximately 10 million people worldwide and is currently incurable (Weiner). Therefore, scientists have been†¦show more content†¦These nonmotor or autonomic symptoms include depression, apathy, anxiety, sweating, sexual dysfunction, memory problems, sleep disturbances, bladder problems, and constipation (Weiner). Among these autonomic symptoms, depres sion is the most common psychiatric symptom in patients with PD since an individual s quality of life decreases and they soon are unable to care for themselves once their symptoms interfere with their everyday life (Tuite). Despite the fact that the cause of Parkinson s Disease remains unknown, the disease has been linked to aging and other genetic and environmental factors. PD is one of the most common causes of disability in the elderly and is usually diagnosed in the fifth or sixth decade (Ronken). However, 10% of cases are in individuals who are diagnosed before they re 40 years old, which is known as early onset Parkinson s (Tuite). And because the symptoms of PD become progressively worse as one ages and the chance of getting it increases as we age, scientists believe that aging is the biggest risk factor in PD (Ronken). Furthermore, scientists have been actively studying PD for decades now, and noteworthy results have been alluded to. Researchers have discovered that genetic factors alone do not play a role in Parkinson s Disease, but do play a role in rare cases of familial PD. Surveys have been done on both monozygotic and dizygotic twins to determine whether the disease was genetic or not. The surveys concludedShow MoreRelatedNeurological Disorder : Parkinson s Disease992 Words   |  4 PagesNeurological Disorder: Parkinson’s Disease One of the most commonly seen neurological disorders is Parkinson’s disease (PD). Named after the doctor who first identified the disease as â€Å"the shaking palsy† Dr James Parkinson (1755-1824), Parkinson’s disease affects over 1 million Americans today. On average around 60,000 Americans are diagnosed with Parkinson’s disease annually. This is an alarming number of new cases but what is even more startling is the fact that thousands of cases go undetectedRead MoreParkinson’S Disease. Abstract. Parkinson’S Disease Is A2430 Words   |  10 PagesParkinson’s Disease Abstract Parkinson’s Disease is a very common disorder these days. Over 10 million people live daily with Parkinson worldwide. Parkinson’s Disease was named after an English surgeon James Parkinson who wrote a detailed description essay called Shaking Palsy in 1817. The average age for Parkinson’s Disease is between 45 to 70 years old but you can also have juvenile or young onset as well. Most common symptoms of Parkinson are tremors, bradykinesia or akinesia, or rigidity orRead MoreA Brief Note On Parkinson s Disease And Its Effects On The Central Nervous System Essay1914 Words   |  8 Pagesmovement nearly impossible.As you try to brush your teeth, your hand keeps shaking. Getting into the shower, you brace yourself against the wall to keep from falling. Then you struggle putting on your clothes. Sitting at the table eating your breakfast, you begin to cough, sputter, and choke on what was an appetizing meal. The life of a person with Parkinson’s Disease is much more difficult than the life of a person without the disease. Everyday tasks seem grueling and unattainable. Scenarios, such asRead More Parkinsons Disease Essay1642 Words   |  7 PagesParkinsons Disease Parkinson’s Disease (PD), the shaking palsy first described by James Parkinson in 1817, is a progressive neurodegenerative disorder which affects in upwards of 1.5 million Americans. The disease begins to occur around age 40 and has incidence with patient age. One survey found that PD may affect 1% of the population over 60. Incidence seems to be more prominent in men, and tends to progress to incapacity and death over one or two decades. Clinical diagnosis of PD isRead MoreEssay on Parkinson Disease (PD)2171 Words   |  9 PagesIntroduction Parkinson disease (PD) is a progressive neurodegenerative disorder characterized mainly by physical and psychological disabilities. This disorder was named after James Parkinson, an English physician who first described it as shaking palsy in 1817 (Goetz, Factr, and Weiner, 2002). Jean- Martin Charcot, who was a French neurologist, then progressed and further refined the description of the disease and identified other clinical features of PD (Goetz, Factr, and Weiner, 2002). PD involves the lossRead MoreParkinson s Disease : A Common Neurological Disorder1157 Words   |  5 Pagesworld.† So says Roberto Garcia d orto in his description for Parkinson’s disease. This disease is a very common neurological disorder. Two centuries ago, James Parkinson was the first to describe the disease in detail. He published a monograph, â€Å"An Essay on the Shaking Palsy,† describing a neurological illness consisting of resting tremors and an odd form of progressive motor disabi lity, now known as Parkinson’s disease. Parkinson’s disease is associated with many challenges and complexities. The diagnosisRead MoreA Look At Parkinson s Disease2700 Words   |  11 PagesA look at Parkinson’s disease Parkinson’s disease (PD) is the second most common neurodegenerative disease. Two other names for PD are shaking palsy and Paralysis agitans. Parkinson’s disease is initiated when the cells in the brain that produce dopamine die over time. Dopamine is a brain chemical used by nerve cells that helps to control the body s muscle movement. Without those brain cells and the dopamine they produce, it becomes increasingly more difficult for the cells that controlRead MoreParkinson s Disease : Causes, Treatments, And Nursing Care2388 Words   |  10 Pages Parkinson’s Disease: Causes, Treatments, and Nursing Care Hannah Wilhelm Tompkins Cortland Community College Parkinson’s Disease: Causes, Treatments, and Nursing Care The World Health Organization projects that, by 2040, neurodegenerative diseases will become more common than cancer (Cashell, 2014). Parkinson’s Disease (PD) is widely listed as the second most common neurodegenerative disease (Wuong, 2012; Gillies et al., 2014; Cashell, 2014; Walker, Davidson, Gray, 2012). This disease, usuallyRead MoreEssay Parkinsons Disease3763 Words   |  16 PagesParkinsons Disease In 1817, James Parkinson published his famous treatise: An Essay on the Shaking Palsy, describing the symptoms which now collectively bear his name. Although many scientists before his time had described various aspects of motor dysfunction (ataxia, paralysis, tremor) Parkinson was the first to collect them into a common syndrome; one which he believed formed a distinctive condition. His sixty-six page essay contained five chapters describing symptoms, differential diagnosesRead MoreParkinson s Disease : A Progressive Neurodegenerative Movement Disease Essay6696 Words   |  27 PagesIntroduction The research problem Parkinson’s Disease (PD) is a progressive neurodegenerative movement disease affecting approximately 1% of people at age 60. It is the most second most commonly occurring neurodegenerative disease in the elderly (after Alzheimer’s Disease). In PD patients, loss of dopamine-producing neurons results in a range of motor and non-motor symptoms. The prevalence of PD increases with age, and currently there is no cure, no means of slowing the disease progression, and no means