Political Impacts Of Andrew Jackson And Theodore Roosevelt Politics Essay

Political Impacts Of Andrew Jackson And Theodore Roosevelt Politics Essay Our seventh and twenty-sixth presidents, Andrew Jackson and Theodore Roosevelt are both recognized for their subsequent impact on history. These two men are considered two of the greatest presidents of our history for their reformative actions. Despite their obvious differences such as backgrounds, time period and political stand points, their personalities, moral opinions, and character link each another. Furthermore, the different contributions that both presidents have made have left a great impact on the history of the United States. The two opposing political parties today, Democrat and Republican, were also the different standpoints of Presidents Jackson and Roosevelt. Andrew Jacksons presidency, also known as the Jacksonian Democracy was based on the ideals of the old Republican party of Jefferson. It positioned itself around a limited government, white male suffrage and strong state governments. The Democratic Party mostly consisted of people like Jackson himself- Southern farmers, Westerners and urban workers. Theodore Roosevelt however, differed completely. Born into wealth, he automatically took the position of any other wealthy men, northern businessmen and professional workers- a Republican. Republicanism, based on former Whigs, and free-soil Democrats believed in supporting banks, business and gold standard- the complete opposite of democratic ideals. The different time periods of Jackson and Roosevelts presidencies also increased their dissimilarities because of the different issues each had to suffice . Due to the time difference of approximately 70 years from when Jackson was in office to Roosevelts administration, the different time periods have emerged and resolved different social issues. Because Jacksons term in office lasted from 1829-1837, his presidency concerned social issues that did not also exist during Roosevelts term which lasted from 1901 to 1909. For example, Roosevelt is responsible for adding the corollary to the Monroe Doctrine which expanded it and authorized the United States to intervene with any foreign powers and affairs. This was a result of the Venezuelan incident with Great Britain and Germany. Germany and Great Britain were attempting to collect money owed them by Venezuela, but Roosevelt considered this a violation of the Monroe Doctrine. He then took out his big stick and ordered a U.S. fleet to the coast of Venezuela. It was then decided by the British, Germany and Venezuela to negotiate with Roosevelt as their mediator. This declaration was called the Roosevelt Corollary. Rather than letting Europeans intervene in Latin America, Roosevelt declared that the United States would intervene instead. Roosevelt, unlike Jackson, had to encounter foreign matters such as the Venezuelan incident, and the Panama Canal. Nevertheless, Jackson also had to resolve other issues that did not exist in the later years, the opposition and dispute of the National Bank, the issue of the Nullification theory and the debate over the Indian Removal Act of 1830. These two men with different views however, had the same approach to dealing and reforming America- they did not have the same ideals but they both had the same moral principles and same approaches in resolution and reformation. Theodore Roosevelt and Andrew Jackson were both known for their tough, aggressive tactics in resolving issues and these two presidents have shown activism in government. President Roosevelt, who did not only believe in Republican ideals, was also considered a Progressive President for the social reformations he completed. Roosevelt, unlike his precedent Republican presidents did not only side with big business, but tried to mediate the workers and their employers instead. In 1902, the United Mine Workers held a strike and Roosevelt became the first President to intervene in a labor management dispute by forcing both sides to settle on a compromise. This was called the Square Deal for labor. It helped improve the equality between laborers and workers rather than just siding with the wealthy as former presidents have always done. Roosevelt further increased reformation when he enforced the Sherman Antitrust Act, regulated railroads, and passed laws such as the Pure Food and Drug Act an d the Meat Inspection Act. During his two terms, he helped increase labor standards which helped the poor, and working class. Andrew Jackson, as a Southern famer, also revolved his presidency around helping and favoring the low, working and middle class. Jackson believed that the bank hurt the working class and only benefitted the upper classes and therefore vetoed the second re-chartering of the National Bank. He once said It is to be regretted that the rich and powerful too often bend the acts of government to their own selfish purposes. (sfgjkkdfjsodkfj) It was Jacksons belief that the bank hurt the working class while benefiting the wealthy upper class, and he never stood for the disenfranchisement of the working class. The banks charter expired in 1836 after Jackson refused to renew it and used one of his presidential vetoes to override congressional votes. This was one of many battles that Jackson felt strongly about, fought, and won. Similarly, Roosevelt fought against instit utions he felt harmed the working class. Both these presidents believed in actively participating in the government but still, these actions could not have been achieved if it werent for the unconventional techniques they used. These two war-time heroes displayed their aggression in dealing with political issues. For example, Theodore Roosevelt had only accomplished the Square Deal by threatening to take over the mines with his federal troops if they did not compromise. He also displayed hostility while dealing with foreign affairs, referred to as the Big-Stick policy by acting boldly and decisively and intimidating other foreign powers. Jackson also threatened and used aggression to achieve what he wanted. During the nullification theory crisis, Jackson debated against John C. Calhoun of South Carolina against the tariff of 1828. Calhoun argued that each state had the right to decide whether to obey a law or to declare it null and could leave the union. Jackson, who wanted to preserve the union, passed the Force Bill which gave him the authority to use military action against any state who threatened the union. At the same time, he privately threatened to kill Calhoun by public hanging. Calhoun gave into Jacksons demands and compromised, thus upholding the tariff without bloodshed and winning a battle against the doctrine of nullification. And although the Indian Removal Act of 1830 was ultimately overturned in the case of Worcester v. Georgia, he supported forcing the Cherokee Indians to move and resettle in the West of the Mississippi to satisfy American citizens. In effect, both these presidents earned the reputations of being tough because of their assertive actions. They both believed in the morality of helping the working class and used aggression to achieve reformation. Reform of social equality for the common man was the principle improvement during both administrations, but Jackson and Roosevelt found different institutions to reform. The contributions and accomplishments that Jackson made during his presidency were mostly political- the spoils system, the pet banks, and the specie circular. Andrew Jackson started the spoils system which rewarded people to federal jobs for one term if they voted for his Democratic party. Because he did not believe in a national bank which he considered to be constitutionally impute, socially unequal, corrupted and instable, (ndfujsfkgjdfg) he vetoed the re-charter of the second bank and withdrew all federal funds and transferred them to various state banks referred to as pet banks. He then hoped to help the effect of inflation by requiring purchases of federal land to be made in gold and silver rather than in paper banknotes. The contributions that Roosevelt made were predominantly social- the Panama Canal, the Ro osevelt Corollary, railroad regulation, the Square Deal of labor, natural conservation and regulatory laws. Roosevelt also worked to trust-bust by enforcing Sherman Act and protective tariffs effectively. He also supported bills for shorter workdays for women and children and state safety inspection of factories. When these bills passed, he appointed inspectors to oversee enforcement of the new rules. He was applauded by working people, social workers, union officials, and citizensà ¢Ã¢â€š ¬Ã‚ ¦ (Whitelaw, 107) Of the two, President Roosevelt had a greater impact on American history because unlike President Jackson, Roosevelts reformative actions and policies are still adequate today. The actions by President Jackson were however, later reversed or repealed. Although his spoil system helped build a strong two-party system, it was later criticized for being corrupted and was later destroyed. Jacksons pet banks eventually caused inflation and specie circular did not help the crisis b ut instead caused the Panic of 1837. This too was eventually overturned and formed into what we have today, a national bank and paper money. President Roosevelt, known as the first modern president has made a bigger impact because his ideals have lasted and has helped politically improve the nation. Trust-busting, the square deal and railroad regulation has economically and morally helped the low working class, and regulatory laws have improved consumer protection. Roosevelt also set aside 150 million acres of land to help build parks. His nature conservation is one of the biggest impacts that still exist today. Though they improved different areas of society, the impacts of their actions were significant. Both Roosevelt and Jackson took on duties that Presidents before them would not have imagined. Their assertive personalities allowed them to get things done that other presidents could not have achieved. They are known as presidents who have set lessons for future leaders. For example, Jackson stood up against a strong British army and won. That gave him the courage to take on foes like the Second U.S. Bank (Kliff) and Theodore Roosevelt understood the power of personality and how much it can aid a presidents success. (Kliff) They protected the common man, and stood up for the working class. Jackson worked to cripple an aristocracy driven, government monopoly in the Second Bank of the United States. Roosevelt used his power to foster a settlement between miners and their employers who mistreated them. They pioneered new policies, while ensuring old laws already in place. Although Roosevelt and Jacksons lives and presidencies were not exactly similar, they share some very unique parallels such as their moral principles and characteristics.

Vital Nature Of Human Being Engineering Essay

Bing in comfort zone is a critical nature of human being. Something less attempt able ever attracts human head. This invention belongs in a zone far more advanced than a fan operated by a manual regulator. This device controls the velocity of the initiation motor used in a fan automatically by feeling the current. Like normal family fan regulators it does non necessitate any attending for commanding the velocity of the fan and therefore it reduces human attempt which is really much clear to us. It uses a TRIAC ( Triode for AC ) based circuitry which minimizes energy ingestion and therefore saves power Vongmanee ( 2004 ) . It gives a broad control of working temperature scope to the user while besides supplying manual control in instance of demand. These characteristics are every bit interesting every bit good as really utile for the mediocre category because of a low purchasing and care cost. This whole invention will be discussed in wining points. Power electronic convertors can be found wherever there is a demand to modify the electrical energy signifier ( i.e. modify its electromotive force, current or frequence ) . Therefore, their power scope from some milli watts ( as in a nomadic phone ) to 100s of megawatts ( e.g in a HVDC transmittal system ) . With â€Å" classical † electronics, electrical currents and electromotive force are used to transport information, whereas with power electronics, they carry power. Therefore the chief metric of power electronics becomes the efficiency Rabisankar ( 2012 ) . Most power electronics systems consist of two major faculties which are power electronics processor that handles power transportation from input to end product and accountant that tells the power processor of what to make by taking the measuring that happens at end product and compared to input.Problem StatementNowadays, many industries utilizing electrical machine in their mill. Electrical machine are used to do the work can be done in clip and to cut down work force in the industry. There is several type of electrical machine we are utilizing today. We have DC motor such as DC series motor and DC shunt motor. We besides have synchronal motor that runs at changeless velocity and we are besides holding initiation motor. A rectifier is an electronic circuit that converts bidirectional electromotive force ( AC electromotive force ) to unidirectional electromotive force ( DC electromotive force ) by utilizing power rectifying tubes or by commanding the firing angle of thyristor/controllable switches. Rectifier normally can be divided into two types that are uncontrolled and phase-controlled. Each type can hold either individual stage or three-phase. A rectifying tube is the simplest electronics switch which it is uncontrolled that the on and off provinces can be determined by the power supply in the circuit itself. AC to DC convertor is largely used in industries and besides in domestic equipment. But many rectifiers in the market merely produce fixed end product so the applications of the rectifiers are limited for certain equipment merely. So, the DC degree of the end product and the power transferred to the burden are fixed when the beginning and burden parametric quantities are established. Holmes ( 1993 ) , Zein ( 1999 ) and Kischan ( 2010 ) . Therefore, to get the better of this job there is a manner to command the end product electromotive force of the rectifier. Basically, the individual stage rectifier is designed utilizing the thyristors or more specifically are called Silicon Control Rectifier ( SCR ) which connected in full-wave rectifier. A thyristor is four beds ( pnpn ) semiconducting material devices that act as switches, rectifiers or electromotive force regulators. Thyristors are electronic switches used in power electronics circuits where control of switch turn-on is required power Vongmanee ( 2004 ) . Therefore, the end product electromotive force can be variable from the scope of nothing electromotive force to full electromotive force by commanding the hold angle of the SCR.Aim and Aims1.3.1 AimThe purpose of the undertaking is to command the velocity of individual stage initiation motor utilizing microcontroller.1.3.2 AimsTo plan the AC electromotive force convertor to changing motor electromotive force To implement the velocity detector for feeling the velocity To compose the plan for commanding the operation of electromotive force convertorScope of the surveyThis undertaking concentrates on a development of a circuit and hardware to acquire dc end product utilizing SCR and PIC16F84A as chief constituent of the undertaking. Besides the Scopess is to plan a microcontroller to command hold angle I ± and it produced variable end products ( velocity ) . To develop the whole undertaking, it consists of three methods which are the construct of shift, the electrical construction, and the package scheduling. After planing and edifice wholly the rectifier circuit, the driver circuit should be able to command the hold angle I ± , that can be adjusted by utilizing microcontroller. It will affect the scheduling development to command the ON province of the power switch and adjust the stage angle. Here, the trigger angle of SCRs will be programmed in certain clip sequence to guarantee the input electromotive force goes from low to full electromotive force.Report StructureThere are all six chapters being constructions in this thesis and every chapter will lucubrate in item about this undertaking. For the first chapter, an overview about this undertaking, Speed Control of Single Phase Induction Motor is discussed including the aims and Scopess of the undertaking as a usher to develop the individual stage controlled rectifier. Chapter 2 will explicate and discourse on the literature reappraisal of the Speed Control of Single Phase Induction Motor. It besides focuses on general debut of the AC to DC convertor with the complete information about this convertor. It gives a brief reappraisal about the types of the rectifiers: uncontrolled and controlled individual stage and three stage convertors used as rectifiers. In this chapter besides discuss about the type of thyristor andthe feature of each type. Chapter 3 discusses the methodological analysiss of the Speed Control of Single Phase Induction Motor that has been applied in finishing this undertaking. In this chapter, it consists of block diagram and flux chart which are explained about the procedure of execution and how the AC electromotive force converts to DC electromotive force so connected to the burden such as DC motor. It is besides discusses briefly how the end product electromotive force can be varied. Chapter 4: we discuss the package and hardware execution of the Speed Control of Single Phase Induction Motor utilizing flow charts and simulation consequences for package execution and PCB layout and hardware working for hardware execution Chapter 5 is discoursing and exposing all the consequences obtained and the restriction of the undertaking. All treatments are concentrated on the consequence and the overall public presentation of the Speed Control of Single Phase Induction Motor. Chapter 6 in overall will discourse on the decision and sum-up of the development of the Speed Control of Single Phase Induction Motor completed undertaking. In this chapter besides discusses on the jobs and recommendation for this undertaking development or alteration.Chapter 2LITERATURE REVIEW & A ; THEORETICAL BACKGROUND2.1 IntroductionThe literature reappraisal and the theoretical background about this undertaking have been made from assorted beginnings like diaries, books, articles and others. From the literature reappraisal, the input that have been collected is utile for better apprehension of this undertaking. It is because for about a century, rectifier circuits have been the most common power electronics circuits used to change over AC to DC. The AC-DC convertor produces a DC end product from an AC input while the mean power transferred from an AC beginning to a DC burden. This convertor normally besides called as a rectifier. The word rectification is used non because thes e circuits produce DC but instead because the current flows in one way. By and large, there are two types of AC-DC convertors which are uncontrolled and controlled.2.2 Literature ReviewHere in the literature reappraisal we understand about this undertaking have been made from assorted beginnings like diaries, books, articles and others. From the literature reappraisal, the input that have been collected is utile for better apprehension of this undertaking2.2.1 Background of Induction motorInitiation motors are little motors holding an end product power less than one Equus caballus power and are by and large operated on individual stage AC supply. These motors perform assortments of service in the place, office, concern concerns, mills and farms and in a figure of other applications where individual stage supply is available. The velocity of initiation motor can be reduced by diminishing stator electromotive force by an sum which is sufficient for the velocity control of some thrusts. While torsion is relative to voltage squared, current is relative to voltage hence, as electromotive force is reduced to cut down velocity, for same current motor develops lower torsion. Consequently, method is suited for application where torsion demand reduces with velocity, which points towards its suitableness for fan and pump thrusts. Variable electromotive force for velocity control is obtained utilizing ac electromotive force accountants. Industrial fans and pumps are normally driven by initiation motors. Thyristors are normally used for commanding the electromotive force to command the velocity of initiation motor. Speed control is obtained by changing conductivity period of thyristors. For low power evaluation machines, anti-paralleled thyristor brace is used.A Speed of the motor can be varied more or less uniformly in the scope of 80 % to 30 % of synchronal velocity of the motor by changing the electromotive force between 100 % to 30 % . The stator electromotive force is controlled in these velocity control systems by agencies of a power electronic accountant. Here two thyristors in anti-parallel are connected between the line and motor in a stage. Normally thyristors in stage control manner are used. It is besides possible to fire the thyristors for merely a part of the rhythm, therefore using conductivity angle use. This is utile in motor control.A A The conductivity of thyristor brace is controlled by altering firing angle of thyristors through microcontroller.2.2.2 Review on Speed Control of Single Phase Induction MotorIn this undertaking the writer speaks about An adjustable velocity thrust moving on the subsidiary twist of single-phase initiation motors is described. Speed fluctuations are obtained by seting the electromagnetic torsi on by commanding the subsidiary twist electromotive force magnitude and stage angle while the motor ‘s chief twist is straight connected to the local public-service corporation mercantile establishment. A variable subsidiary twist electromotive force stage angle is shown to give important torsion control, supplying get downing and driving torsion, every bit good as reversability and some braking torsion. The analysis includes the finding of the relationship between the subsidiary twist electromotive force stage angle and the stage angle difference between the chief and subsidiary twist currents. A control methodological analysis for choosing an subsidiary twist electromotive force magnitude and stage angle is examined. Simulation consequences of the motor ‘s torque-speed features utilizing the controlled subsidiary twist supply are shown and discussed. In decision the thrust was tested utilizing a ergometer to by experimentation verify the consequences of the theory and simulations, and to research the practicality of a simple, low-priced single-phase initiation motor thrust utilizing subsidiary tortuous electromotive force control Collins ( ) Then the writer in this paper reports about a High-performance Speed-Sensorless Control of an Induction Motor Drive Using a Minimalist Single-Phase PWM Converter where he states that Home contraptions and comfort conditioners are yet to profit from the recent developments in power electronics because of cost restraints. In this paper, a speed-sensorless initiation motor thrust system utilizing convertors with decreased device counts ( minimalist, thin convertors ) and actuated from a single-phase system is proposed for such low-priced applications. The analysis, control, dynamic, and steady-state features of the proposed thrust are by experimentation illustrated. In decision the undertaking was able to show the methodological analysis for the analysis and control of a high-performance initiation motor thrust actuated by two controlled rectifier-inverter systems with decreased count of exchanging devices. The general attack for finding the transition signals required for the carrier-based PWM pulsation coevals for this category of minimalist convertors has been set Forth. The input supply electromotive force is a individual stage and the input current is controlled utilizing a natural mention frame accountant to run near to integrity supplanting power factor. Olorunfemi ( 2005 ) This paper the writers Rodrigo and Hilton ( 2006 ) investigates the job of single-phase initiation motor ( SPIM ) sensorless velocity control. A distinct clip PI accountant and a sensorless technique are implemented on a PC-based platform utilizing a standard three-phase inverter thrust and vector control. An indirect rotor flux oriented control technique is developed based on a sensorless technique. A MRAS with a Kalman Filter algorithm is developed for a rotor velocity appraisal. In decision the Simulation and experimental consequences are presented to formalize the effectivity of the method. a MRAS sensorless control method was applied to a single-phase initiation motor. A MRAS algorithm was used to gauge the rotor velocity, from the computation of the motor instantaneous reactive power. In add-on, a Kalman Filter was used to filtrate the works variable provinces for a minimisation of the velocity estimation oscillations. An Indirect Field Orientation Control technique was used in the individual stage initiation motor thrust. This method is an alternate for single-phase initiation motor thrusts and can better efficiency with variable velocity operation. Experimental and simulation consequences show the effectivity of the technique. Here the writer sates that A centroid-based binary weight multiplier ( CBWM ) exchanging technique was proposed, which was suited for full-bridge inverter applications of individual stage initiation motor ( SPIM ) velocity. control by utilizing 8 spot CBWM to modulate square single-phase wave form and merchandise a control signal form. This technique was evaluated, and its public presentation was compared with bing BRM exchanging technique. In decision the public presentation rating and comparing was involved to the entire harmonic deformation ( THD ) , figure of pulsations per rhythm of the inverter end product wave form, both evident and reactive power. The aim of the new shift technique is to minimise the THD. The simulation consequences presented in this paper, the CBRM shift technique yields a important betterment in footings of minimum THD ( 5 % -100/ , ) when comparison with BRM. The CBWM has been considered to use for variable-speed of the individual stage three stage initiation motor thrust applications in footings of changing electromotive force and changing frequence Tipsuwanpom ( 2001 ) . This paper describes a low cost strategy for commanding the velocity of a three stage initiation motor. The motor was connected to a individual stage supply via a two component stage balancer. Speed control is achieved by changing the supply electromotive force utilizing the stage angle control. Theoretical analysis is supported by experimental measurings. Finally as consequences a new and cost effectual strategy for commanding the velocity of a three stage initiation motor fed from a individual stage supply has been presented. The proper strategy requires a individual stage supply and two thyristors as opposed to the three stage supply and six thyristors in the conventional strategy. A two-element stage balancer has been used in the new strategy to accommodate the motor to the supply. The two elements are made pure reactive elements in order to cut down the Cu loss. The value of the two reactive elements can be selected to be variable to guarantee zero negative sequence electromotive force for whole the scope of operation. Alternatively, the strategy may be simplified by choosing an mean fixed value for the two elements to give about minimal imbalance between the stator electromotive forces in order.to achieve better public presentation both in the steady province and transeunt conditions. Experimental consequences confirm the high qu ality of the proposed strategy. Alolah ( 1993 ) In this paper the writer Jannati ( 2011 ) states that This paper discusses a new vector control scheme for single-phase initiation motor runing with two twists. The vector control is based on the Rotor Field Oriented ( R.F.O ) method that was adapted for this type of machine. This new vector control is suited for all of the imbalanced initiation motors. Furthermore the rotor velocity of the imbalanced motor was estimated by utilizing Extended Kalman Filter ( EKF ) . The consequences shows the good public presentation of the proposed method. Single-phase initiation motors are widely used in the place and industrial applications. Although the power of these motors is low the figure of them is high and they use a big portion of produced electrical power. On the other manus the efficiency of these motors is low so we can state that a big sum of electrical power is wasted by these types of motors. In this paper, we proposed to utilize a power electronic thrust to increase the efficiency of the individual stage initiation motors. In add-on, we proposed a new method for the vector control of the motor. In this paper is focused on the velocity control of a individual or two stage initiation motor utilizing a diametral inversion ( DI ) of the stator electromotive forces. The alterations in the velocity mistake mark are responsible for each DI which inverts the stator electromotive force phasor and its angular speed. The chief and the subsidiary twists are ever connected and therefore the velocity mistake mark allows to determinate the revolving field way. The motor is fed by a rectifier associated with a three-phase inverter. The nucleus of the thrust bid it ‘s a 16-bit dsPIC device, which receives the velocity mistake mark and bring forth the appropriate PWM mention electromotive forces marks to the three-phase inverter. In decision In this new attack the diametral inversion was used, avoiding the rotor flux place finding in every blink of an eye. With this bid action the applied electromotive force phasor can be inverted and revolve in the opposite way depending on the velocity mistake mark. As effect, the torque way can alter really rapidly and the thrust will hold a good public presentation. Hence, the motor velocity can be easy adjusted. The consequences revealed that the rotor velocity reaches the mention velocity without relay Manual ( 2008 ) . The writer Deniz and Murat ( 2008 ) presents a variable velocity control method for fan applications. A pulse-width-modulated ( PWM ) AC chopper changes the effectual value of the supply electromotive force applied to a single-phase initiation motor. This variable supply electromotive force gives the ability to command the velocity of the motor. Harmonicss generated by the velocity control unit are by an input harmonizing to EN 61000-3-2 bounds for harmonic current emanations criterions. In decision A 25kHz PWM AC Chopper used in a single-phase initiation motor thrust was designed and realized in this survey for both domestic and industrial fan applications. This circuit can be used to command the motor velocity harmonizing to the temperature mention. Due to high frequence shift, the PWM AC chopper does non bring forth low frequence harmonics which are multiples of the 50Hz constituent. The harmonic deformations appear at higher frequences that are really multiples of the shift frequence and really easy to filtrate. This paper on Single-phase Induction Motor Speed Control Through a PIC Controlled Sinusoidal PWM Inverter to analyze the public presentation of a single-phase PIC ( programmable integrated circuit ) controlled sinusoidal PWM inverter driving a single-phase initiation motor ( with get downing capacitance ) at assorted burden conditions ( 3/4 of burden and full burden ) . The control was implemented in such a manner that it is allowed the alteration in the motor velocity via a PIC. The attraction of this constellation is the riddance of a personal computer to bring forth sinusoidal PWM pulsations. As consequences it was able to accomplish the chief undertaking in this work, is to do a compact openloop sinusoidal PWM inverter to command the velocity of an little single-phase initiation motor. This compact inverter had its hardware reduced to a lower limit through the usage of a programmable incorporate circuit ( PIC ) micro-controller ( PIC16C73A ) . In this sense a personal computer interface was avoided. One of the troubles was the deficiency of information on the most efficient control logic in this instance and its aims. One of the grounds was that the usage of a PIC in such applications is really recent, the other ground is the deficiency of importance in the industry ‘s sentiment of the single-phase accountants when compared with three-phase control systems Cunha ( 2001 ) . In this paper a Single stage initiation motors ( SPIM ) are widely used at low power degrees because of their simple building, robust nature and nominal monetary value. Conventionally, they have one operational stator twist and the velocity of the motor is non controlled. But SPIM drives for higher power degrees have both chief and subsidiary twist staying operational throughout and can be treated as asymmetrical, two-phase machines. High public presentation operation of these asymmetrical machines was associated with the jobs of patterning the dissymmetry and commanding the electromagnetic torsion oscillations. Different research groups have proposed different strategies to undertake the above said troubles. In decision the theory, analysis and simulation consequences for the vector control technique for SPIM based on stator flux orientation are presented as above. From the consequences, it can be concluded that both for flux weakening part ( above base velocity ) and changeless flux zone ( below base velocity ) , the algorithm performs satisfactorily. The little torsion oscillations are low-cost sing the simpleness of the algorithm Nanda ( 2011 ) . This paper presents the photovoltaic ( PV ) H2O pumping system with a maximal power point trailing ( MF'PT ) . The H2O pumping system uses a variable velocity individual stage initiation motor ( SPIM ) driven a centifugal pump by a field oriented control ( FOC ) inverter. The system under survey consists of two subdivisions. First, the MPPT utilizing a DC-DC convertor controlled the responsibility rhythm to track maximal power 60m PV under different sunstroke conditions. The responsibility rhythm straight relate with a flux bring forthing current constituent ( Ids ) . Second, the FOC inverter uses a current control electromotive force beginning inverter ( CC-VSI ) for SPIM driven the centifugal pump. As consequences the field oriented control individual stage initiation motor thrust system supplied by photovoltaic arrays is presented in this paper. The SIMULINK plan is used tool in simulation for determine the respond of thrust system by closely generated status with the degree of light strength alteration. The simulation consequence is demonstrated the respond of thrust in electromotive force ( Vdq ) , current ( Idq ) , motor ‘s velocity and electromagnetic torsion which are changed as measure input bid and measure burden. The decision are shown when the light strength degree alteration, the electromotive force and the velocity of motor are changed as good, ensuing from the system received the power increased. As reference, burden of motor pump is changed. The capacity of pump will precisely depend on the velocity of motor alteration Varni ( 2004 ) . In this paper the writer discusses about The diametral inversion ( DI ) of the stator voltages has been used to command the rotor place of the three phase- initiation motor. In this paper the DI is applied on a individual stage initiation motor thrust to command its velocity. The alteration of the velocity mistake mark causes a DI. Each DI inverts the stator electromotive force phasor and its angular speed. The chief and the subsidiary twists are ever connected and so the mark of the velocity mistake determines the revolving field way. The motor is fed by a rectifier associated with a three-phase inverter faculty. Two mention electromotive forces are PWM modulated utilizing a sigma-delta closed cringle scheme. As decision the consequence of an probe about a new attack to controsl the velocity of a individual stage or two initiation motor thrust was presented and its effectivity was analyzed by several simulation trials. In this new attack the diametral inversion was used. With this bid action the applied electromotive force phasor can be inverted and revolve in the opposite way depending on the signal mistake velocity. As effect, the torque way can alter really rapidly and the thrust will hold a good public presentation. The simulation consequences revealed that the rotor velocity reaches the mention velocity without muffling and with irrelevant wave-off in laden or unloaded conditions. The simulation consequences besides revealed that the velocity control presents high hardiness against external torsion perturbations Manuel and Armando ( 2008 ) . Here in Operating individual stage initiation motors across a broad scope of velocity and burden with high efficiency the writer Klaus ( 2009 ) has stated in the paper at manus the suitableness of several different capacitance run individual stage initiation machines for Phase Control, Integral ( Half ) Cycle Control or Integral Switched Cycle Control is investigated. The initiation machine ‘s theoretical account ‘s electrical and mechanical parametric quantities are estimated and simulations are carried out in order to look into the influence of the parametric quantities on entire input power, torsion and losingss. Measurements are carried out entering rotor velocity and entire input power comparing Phase Control and Integral Switched Cycle Control at about the same operating points. From these informations a simple method is derived that can be used for choosing machines for low cost velocity controlled thrusts. In decision the parametric quantities rotor weaving opposition and escape reactance provide a good standard for choosing individual stage initiation motors for low cost velocity control drives. These parametric quantities can be derived from the individual stage locked rotor trial, which is simple to execute, or can be obtained from the maker of the machine. Another possibility is to utilize the absolute value of the individual stage short circuit electric resistance as a step of the suitableness of a certain machine. The higher the per unit values of these parametric quantities are, the lower the input power and therewith the temperature rise at low velocity. In this paper a Single Phase AC Induction Motors are one of the most widely used motors In the universe, yet comparatively small work has been done In the application of power electronic convertors to these motors to accomplish variable velocity operation. Where variable velocity is required, it Is normally achieved either by mechanical choking, or by exchanging between two or more flexed twist constellations. This paper proposes a method for utilizing a standard three stage electromotive force beginning inverter to accomplish broad scope variable velocity control of a individual stage Induction motor, by linking the chief and subsidiary twists of the motor across the span as an imbalanced three stage burden. The motor Is analyzed as an imbalanced two stage system to find the torsion that can be expected under variable frequence control, and a new transition scheme Is described which achieves the maximal possible convertor for a two stage end product electromotive force ( balanced or unbalanced ) . In decision method for modulating a three stage VSI span to accomplish broad scope variable velocity operation of a balanced or imbalanced two weaving initiation motor. It investigates motor operation under these conditions, and considers restrictions inherent in the technique. From these probes, a precise transition scheme is proposed for supply frequences runing from nothing to motor rated frequence, so that rated torsion can be achieve from the motor at any velocity with the motor operating at a little faux pas. The scheme has been to the full verified both in simulation and by experimentation Holmes & A ; . Kotsopoulos ( 1993 ) . In this paper, a fresh velocity control of a individual stage initiation motor is proposed utilizing a modified inverter. Three MOSFETs are used for commanding the flux linkage of a individual stage transformer, its secondary twist is connected in series with the motor. On-line Bang-Bang velocity control of motor strategy is implemented utilizing a microprocessor to deduce the inverter. A mathematical theoretical account for the single-phase initiation motor is presented, which is used to construct up a simulation plan for a certain coveted velocity. Experimental consequences have been carried out to look into the motor public presentation with the accountant. Good understanding has been obtained between simulation and experimental consequences. In decision fresh method of velocity control of an ac motor ( single-phase running capacitance initiation motor ) by seting the flux linkage between two magnetic spirals utilizing a modified inverter and Bang-Bang control. This scheme influences the effectual tantamount induction of two spirals connected in series with the motor, accordingly control the motor applied electromotive force. Simulation and experimental survey have shown that, by this method of control the velocity of the motor can be changed swimmingly from zero value to the rated velocity with high response Zein ( 1999 ) . In this paper the writer Krischan ( 2010 ) states about a Low cost velocity control of capacitance run individual stage initiation motors across a broad scope of velocity and burden continues to be of involvement. In the paper at manus the line reaction every bit good as the electromagnetic compatibility of three different methods for velocity control – Phase Control, Integral ( Half ) Cycle Control or Integral Switched Cycle Control – is investigated. Measurements are carried out at different rotor velocity and burden torsion, comparing the methods at about the same operating points. FFT is computed for the line currents and measurings on electromagnetic compatibility. As decision they met the bounds given by the European Standard with Phase Control every bit good as with Integral Cycle Control, a brinies filter has to be used. Uniting Built-in Cycle Control with Phase Control leads to higher costs in order to follow with EMC ordinances but provides much higher efficiency.2.3 Theoretical BackgroundIn this subdivision we discuss about the theoretical background of our undertaking where we shall discourse about the chief hypothesis and the inside informations of the peripherals and constituents of the undertaking to construct in the proto type.2.3.1 Personal computer Software:Hardware can be interfaced with the personal computer to command the velocity of motor. It has no as such practical usage it is merely for larning point of position. Hardware can be connected with personal computer through a consecutive port. Consecutive communicating is used to pass on between hardware and package. Ocular basic 6 is used for doing this GUI ( Graphic user Interf ace ) . Baud rate is 2400 bits per second. Degree centigrades: UsersSONYDesktopic-max-232.jpg Figure 2.1 MAX 232 device TheA MAX232A is anA incorporate circuit, foremost created byA Maxim Integrated Products, that converts signals from anA RS-232A series port to signals suited for usage inA TTLA compatible digital logic circuits. The MAX232 is a double driver/receiver and typically converts the RX, TX, CTS and RTS signals.2.3.2 The ThyristorThyristors or Si controlled rectifiers ( SCR ) as they are sometimes known may look to be unusual electronics constituents in many ways, but they are peculiarly utile for commanding power circuits. As such these electronics constituents are frequently used for applications such as light dimmers, and there may be thyristor circuits used in many power supply applications. Thyristors are simple to utilize and cheap to purchase and frequently thyristor circuits are easy to construct and utilize. All these grounds make thyristors ideal constituents to see for many applications. The thyristor may be considered a instead an unusual signifier of electronics constituent because it consists of four beds of otherwise doped Si instead than the three beds of the conventional bipolar transistors. Whereas conventional transistors may hold a p-n-p or n-p-n construction with the electrodes named aggregator, base and emitter, the thyristor has a p-n-p-n construction with the outer beds with their electrodes referred to as the anode ( n-type ) and the cathode ( p-type ) . The control terminus of the SCR is named the gate and it is connected to the p-type bed that adjoins the cathode bed. Structure of a thyristor or Si controlled rectifier ( SCR ) Figure 2.2 Structure of a thyristor or Si controlled rectifier ( SCR ) Thyristors are normally manufactured from Si, although, in theory other types of semiconducting material could be used. The first ground for utilizing Si for thyistors is that Si is the ideal pick because of its overall belongingss. It is able to manage the electromotive force and currents required for high power applications. Additionally it has good thermal belongingss. The 2nd major ground is that Si engineering is good established and it is widely used for a assortment of semiconducting material electronics constituents. As a consequence it is really inexpensive and easy for semiconducting material makers to utilize. The manner in which a thyristor operates is different to other devices. Normally no current flows across the device. However if a supply is connected across the device, and a little sum of current is injected into the gate, so the device will â€Å" fire † and behavior. It will stay in the conducting province until the supply is removed. To see how the thyristor operates, it is deserving looking at a thyristor tantamount circuit. For the interest of an account, the thyristor circuit can be considered as two dorsum to endorse transistors. The first transistor with its emitter connected to the cathode of the thyristor is an n-p-n device, whereas a 2nd transistor with its emitter connected to the anode of the thyristor, SCR is a p-n-p assortment. The gate is connected to the base of the n-p-n transistor as shown below. Thyristor tantamount circuit Figure 2.3 Thyristor tantamount circuit When a electromotive force is applied across a thyristor no current flows because neither transistor is carry oning. As a consequence there is no complete way across the device. If a little current is passed through the gate electrode, this will turn â€Å" on † the transistor TR2. When this occurs it will do the aggregator of TR2 to fall towards the electromotive force on the emitter, i.e. the cathode of the whole device. When this occurs it will do current to flux through the base of TR1 and turn this transistor â€Å" on † . Again this will now seek to draw the electromotive force on the aggregator of TR1 towards its emitter electromotive force. This will do current to flux in the emitter of TR2, doing its â€Å" on † province to be maintained. In this manner it merely requires a little trigger pulsation on the gate to turn the thyristor on. Once switched on, the thyristor can merely be turned off by taking the supply electromotive force. It can be seen that current will merely flux in one way through the thyristor. If a contrary electromotive force is applied, so no current will flux, even if some gate current is applied. In this manner for thyristor circuits used for AC, operation merely occurs over one half of the AC wave form. For the other half of the rhythm the device remains inoperative and no current can flux. There are many thyristor circuits that are in common usage. They can be sued in many applications from AC control as am utilizing it here to command the velocity of AC motor. The thyristor driver – Opto-isolator: besides called anA optocoupler, A photocoupler, orA optical isolator, is â€Å" an electronic device designed to reassign electrical signals by using light moving ridges to supply matching with electrical isolation between its input and end product † .The chief intent of an opto-isolator is â€Å" to preventA high voltagesA or quickly altering electromotive forces on one side of the circuit from damaging constituents or falsifying transmittals on the other side Degree centigrades: UsersSONYDesktopoptocoupler.jpg Figure 2.4 the Thyristor driver2.3.4 AT89C51 microcontroller:The AT89C51 is a low-power, high-performance CMOS 8-bit personal computer with 4K bytes of Flash programmable and effaceable read merely memory ( PEROM ) . The device is manufactured utilizing Atmel ‘s high-density nonvolatilizable memory engineering and is compatible with the industry-standard MCS-51 direction set and pinout. The on-chip Flash allows the plan memory to be reprogrammed in-system or by a conventional nonvolatilizable memory coder. By uniting a various 8-bit CPU with Flash on a massive bit, the Atmel AT89C51 is a powerful personal computer which provides a highly-flexible and cost-efficient solution to many embedded control applications. Degree centigrades: UsersSONYDesktopSdochan89C51.jpg Figure 2.5 8051 Microcontroller

Leadership Discovery Project Essay

As we chatted I explained to him the baggy pants style began in the mid 1980’s with the birth and spread of hip-hop. I remember so well, pulling my oversized men’s pants down to my hips. The look was actually slimming to a larger girl like me as an added bonus. I also, remember, our assistant principal calling several of us into the office and telling us to pull up our pants – or be sent home, with zeros for the day. I am pretty sure that we did as he asked, at least until he turned around anyway. Sometime later, I learned the baggy pant style I sported (well into my 20’s) had negative beginnings. The style allegedly began as a salute to prison attire, which consisted of oversized pants and shirts. Often the pants would be falling down and inmates were not allowed to have a belt. Another claim is even more disturbing. Supposedly, the pants worn low, hanging down, were an invitation for sex in the prison world. Perhaps, I always thought, some kid just could not afford a belt and started walking around holding up his britches the best he could. Either way, baggy pants; they came and they have endured. (Parker, 2009) Some kids may be aware the style is reminiscent of prison attire. They might actually embrace the idea. The majority of the kids, however, who exhibit baggy pants, are more likely interested in looking like their peers, emulating musicians and actors, and wearing something that is defiant of the conservative nature of authority. Having a glance at someone’s underwear can be offensive. It can be downright aggravating. Even the president has chimed in on the controversial subject of baggy jeans. He said during his 2008 campaign( to MTV), â€Å"There are some issues we face, that you don’t have to pass a law, but that doesn’t mean folks can’t have some sense and some respect for other people, and you know some people might not want to see your underwear – I’m one of them. † (Blunk, 2012) I would have to agree with the president that I don’t want to see the underwear of young men with â€Å"pants on the ground. By the same standard, though, I would also like not to see, but cracks of older men hanging out, men in running shorts who expose their scrotum, muffin tops, thong underwear revealed, cops in cowboy boots, camel toes, and PLEASE, NO leggings worn by anyone over the age of ten. However bothersome, ugly, gross, annoying, disrespectful, or distasteful baggy pants are – or any other fashion fiasco – none qualify as a good reason to pa ss a law. If baggy pants are linked to crime – especially gang crime – such as lawmakers in Hawkinsville, GA, Trenton, NJ, and several towns in Louisiana claim, then it seems a fair ypothesis that all cowboy boot cops are racist, but crack revealers are child molesters and any woman who bears her thong is surely a â€Å"ho†. With a system such as this, racial profiling or any other profiling for that matter will become tools of the past. All we will need to ask is, â€Å"what were they wearing? † (Walton, 2011) (Parker, 2009) In spite of the fact that many people do not appreciate the appearance of baggy jeans, banning them is a counterproductive way to promote moral code or reduce crimes committed by young people. Pants are not a driving factor behind crime statistics. What leads to a life of crime are elements like socio-economics, education or lack of, history of crime in a family, and other situational elements. (Parker, 2009) It is not the baggy pants we have to worry about but, rather, the brain connected to the neck, connected to the torso, connected to the legs that hold the pants up. Unless you take into consideration, of course, the one benefit to law enforcement that baggy pants bring to the table; they are detrimental to the objective of escape! It seems to me that a cop would only hope for criminal wearing baggy jeans when in pursuit! Simply put, baggy jeans are a police officer’s best friend. (Feb. 17th, 2012) There is always an article of clothing or fashion statement for Americans to consider offensive. In the past it was anti-short skirts for women, anti-long hair for men, and anti-leather jackets for all. We graduated to anti-glove, anti-piercings, and anti-hoodie. But, the style†¦ and hatred for it†¦. that has endured longest is†¦ anti-baggy pants. (Walton, 2011) Americans are often guilty of setting limits on the issues that are irrelevant. If there is a school shooting – supply more cameras and metal detectors, if the classrooms are crowded and kids won’t listen then drug everyone up, and if kids are texting on cell phones while driving and dying from it then create a bumper sticker. Geeze! If we are worried about violence, crime, or the unsuccessful lives of young people, why then do we not set real, stern, limits on the things that hurt young people most; guns, drugs, automobiles, alcohol, tobacco and caffeine ? Perhaps this is because all of these things make money for a lot of people in our country. So, we go after the one thing that cannot talk back – a pair of pants. Or can they? Julius Hart was arrested in 2011 in Riviera Beach, Florida for wearing pants that were considered too low; exposing at least four inches of his boxer shorts. He spent the night in jail and was fined $150. 00. He decided to take the case to court and challenge the law. He claims wearing baggy pants is his constitutional right and he is hurting no one. The case is pending in the West Palm Beach Court. . (Feb. 17th, 2012,) This is just one example of what I like to think of as the â€Å"rise of the baggies,† but there are more. When the West Virginia House of Representatives tried to outlaw the wearing of low-slung pants circa 2007, they received ridicule from Sydney to London. Comedians joked about a â€Å"boxer’s rebellion,† and there were so many conflicting online political blogs the state Senate quickly killed the bill. (Parker, 2009) This mockery has not stopped other politicians from trying to eradicate the fashion we know as â€Å"the baggies. † Bans have become law or are being considered in at least eight states. The movement is fueled by growing worries that sloppy dress by America’s youth could be related to delinquency, poor learning and crime. (Parker, 2009) Elements of our society are obsessed with what the youth is trying to express in their attire. For me, however, the concern lies more in what they are not expressing in their attire; â€Å"I am not secure,† â€Å"I am not seeking a professional position,† â€Å"I am not able to stand apart from my crowd of peers†. I do not believe laws can solve attire concerns such as this; only education, consideration and personal motivation will do the job. There is racial discussion surrounding this debate. Many people, including law makers and religious affiliates, in all racial groups see this primarily as a black issue. Nothing could be further from the truth. If you walk down the halls of any white middle school or high school you will find there are many white boys wearing pants, â€Å"low and baggy. † The style is no longer associated as a hip-hop trend. It is cross-culture, crosses over socio-economic boundaries, and can be associated with also: punk, grunge, and mod, all trends that have surfaced in recent years. This is not a black issue as much as some may want it to be. Although I am resistant to this being racial issue, I am glad that many of the laws proposing bans on baggy pants have been met with resistance and action by the American Civil Liberties Union and the NAACP (National Association for the Advancement of Colored People). This is not just racial profiling. It is wardrobe profiling. I guess this means that all men in expensive suits are going to steal my retirement fund, or perhaps my son, who got cold in the theater and put his hoodie on†¦is actually a gun toting gang member. Conceivably a Supreme Court case for this would read, â€Å"The U. S. Supreme Court against Clothes! It makes me wonder if we are actually being manipulated by the powers that be†¦into a society of nudity. Maybe they just want to see us all naked. I think I will stick with the baggy pants. (Blunk, 2012) â€Å"Droopy Drawers,† â€Å"baggies,† or just â€Å"pants on the ground,† as they are referred to, are a fashion statement. For some , wearing them may mean a little more, for others they are only following the crowd. Some say it’s a ridiculously stupid, annoying, and sloppy way to dress. Others do not bother to care either way. Many folks connect these pants to criminal behavior. I do not and furthermore, I find it absurd that others do.

Valens and the Battle of Adrianople (Hadrianopolis)

Bad intelligence gathering and the unwarranted confidence of Emperor Valens (A.D. c. 328 - A.D. 378) led to the worst Roman defeat since Hannibals victory at the Battle of Cannae. On August 9, A.D. 378, Valens was killed and his army lost to an army of Goths led by Fritigern, whom Valens had given permission only two years earlier to settle in Roman territory. Division of Rome In 364, a year after the death of Julian, the apostate emperor, Valens was made co-emperor with his brother Valentinian. They chose to split the territory, with Valentinian taking the West and Valens the East—a division that was to continue. (Three years later Valentinian conferred the rank of co-Augustus on his young son Gratian who would take over as emperor in the West in 375 when his father died with his infant half-brother, Gratian, co-emperor, but only in name.) Valentinian had had a successful military career prior to being elected emperor, but Valens, who had only joined the military in the 360s, had not. Valens Tries to Reclaim Land Lost to the Persians Since his predecessor had lost eastern territory to the Persians (5 provinces on the eastern side of the Tigris, various forts and the cities of Nisibis, Singara and Castra Maurorum), Valens set out to reclaim it, but revolts within the Eastern Empire kept him from completing his plans. One of the revolts was caused by the usurper Procopius, a relative of the last of the line of Constantine, Julian. Because of a claimed relationship with the family of the still popular Constantine, Procopius persuaded many of Valens troops to defect, but in 366, Valens defeated Procopius and sent his head to his brother Valentinian. Valens Makes a Treaty With the Goths The Tervingi Goths led by their king Athanaric had planned to attack Valens territory, but when they learned of Procopius plans, they became his allies, instead. Following his defeat of Procopius, Valens intended to attack the Goths, but was prevented, first by their flight, and then by a spring flood the next year. However, Valens persisted and defeated the Tervingi (and the Greuthungi, both Goths) in 369. They concluded a treaty quickly which allowed Valens to set to work on the still missing eastern (Persian) territory. Trouble From the Goths and Huns Unfortunately, troubles throughout the empire diverted his attention. In 374 he had deployed troops to the west and was faced with a military manpower shortage. In 375 the Huns pushed the Goths out of their homelands. The Greuthungi and Tervingi Goths appealed to Valens for a place to live. Valens, seeing this as an opportunity to increase his military, agreed to admit into Thrace those Goths who were led by their chieftain Fritigern, but not the other groups of Goths, including those led by Athanaric, who had conspired against him before. Those who were excluded followed Fritigern, anyway. Imperial troops, under the leadership of Lupicinus and Maximus, managed the immigration, but badly—and with corruption. Jordanes explains how the Roman officials took advantage of the Goths. Soon famine and want came upon them, as often happens to a people not yet well settled in a country. Their princes and the leaders who ruled them in place of kings, that is Fritigern, Alatheus and Safrac, began to lament the plight of their army and begged Lupicinus and Maximus, the Roman commanders, to open a market. But to what will not the cursed lust for gold compel men to assent? The generals, swayed by avarice, sold them at a high price not only the flesh of sheep and oxen, but even the carcasses of dogs and unclean animals, so that a slave would be bartered for a loaf of bread or ten pounds of meat.—Jordanes Driven to revolt, the Goths defeated the Roman military units in Thrace in 377. In May 378, Valens aborted his eastern mission in order to deal with the uprising of Goths (aided by Huns and Alans). Their number, Valens was assured, was no more than 10,000. [W]hen the barbarians ... arrived within fifteen miles from the station of Nike, ... the emperor, with wanton impetuosity, resolved on attacking them instantly, because those who had been sent forward to reconnoiter—what led to such a mistake is unknown—affirmed that their entire body did not exceed ten thousand men.- Ammianus Marcellinus,  The Battle of Hadrianopolis Occupation Index - Ruler By August 9, 378, Valens was outside of one of the cities named for the Roman emperor Hadrian, Adrianople. There Valens pitched his camp, built palisades and waited for Emperor Gratian (who had been fighting the Germanic Alamanni)  to arrive with the Gallic army. Meanwhile, ambassadors from the Gothic leader Fritigern arrived asking for a truce, but Valens didnt trust them, and so he sent them back. The historian Ammianus Marcellinus, the source of the only detailed version of the battle, says some Roman princes advised Valens not to wait for Gratian, because if Gratian fought Valens would have to share the glory of victory. So on that August day Valens, thinking his troops more than equal to the reported troop numbers of the Goths, led the Roman imperial army into battle. Roman and Gothic soldiers met each other in a crowded, confused, and very bloody line of battle.   Our left wing had advanced actually up to the wagons, with the intent to push on still further if they were properly supported; but they were deserted by the rest of the cavalry, and so pressed upon by the superior numbers of the enemy, that they were overwhelmed and beaten down.... And by this time such clouds of dust arose that it was scarcely possible to see the sky, which resounded with horrible cries; and in consequence, the darts, which were bearing death on every side, reached their mark, and fell with deadly effect, because no one could see them beforehand so as to guard against them.-  Ammianus Marcellinus: The Battle of Hadrianopolis Amid the fighting, an additional contingent of Gothic troops arrived, far outnumbering the distressed Roman troops. Gothic victory was assured. Death of Valens Two-thirds of the Eastern army were killed, according to Ammianus, putting an end to 16 divisions. Valens was among the casualties. While, like most of the details of the battle, the details of Valens demise are not known with any certainty, it is thought that Valens was either killed towards the end of the battle or wounded, escaped to a nearby farm, and there was burned to death by Gothic marauders. A supposed survivor brought the story to the Romans. So momentous and disastrous was the Battle of Adrianople that Ammianus Marcellinus called it the beginning of evils for the Roman empire then and thereafter. It is worth noting that this catastrophic Roman defeat occurred in the Eastern Empire. Despite this fact, and the fact that among the precipitating factors for the fall of Rome, barbarian invasions must rank very high, the fall of Rome, barely a century later, in A.D. 476, did not occur within the Eastern Empire. The next emperor in the East was Theodosius I who conducted clean up operations for 3 years before concluding a peace treaty with the Goths. See Accession of Theodosius the Great. Source: De Imperatoribus Romanis Valens(campus.northpark.edu/history/WebChron/Mediterranean/Adrianople.html) Map of the Battle of Adrianople (www.romanempire.net/collapse/valens.html) Valens