Slippery Slope The Story of a Frazzled Sophomore

Slippery Slope The Story of a Frazzled Sophomore Friday night I slept for 10 hours and 8 glorious minutes. If you subtract the 4 minutes I spent staring at the squiggly darkness inside of my eyelids before I drifted off, it was actually only 10 hours and 4 minutes, still a respectable amount of time by most peoples’ standards. Saturday morning, however, when I woke up at 9:29am for the last conference tennis match of the season, instead of the spry, bright-eyed youth that I should have been, especially considering how much sleep I had gotten, I felt tired. Tired. Exhausted. Bushed. Ready to curl up into a ball and sleep, even though I had just woken up. The last three weeks have been hard, and this Saturday has been the first time I’ve really been able to breath. I know that there are probably people out there juggling three times as many things as I am, but stress is relative and if the bone-wearying fatigue that still permeates my body and makes my eyes feel heavy is any indication, then for all intents and purposes, I was stressed out. It doesn’t start out that way. The year begins innocuously enough, wooing you into a sense of calm and control: psets are shorter than usual, lectures are still covering old material, and there are no exams in sight. Perhaps a summer free of academic worries had stripped me of the urgency that just one particularly nasty hell week can instill in you, something I thought I had trained myself to overcome last year. Instead, I sat in the dining halls for hours, laughing over a frothy cup of chocolate milk and a plate of cheesy waffles. I went out and about, spending time with friends who were much better conversationalists than my textbooks and psets. I made time for things that made me happy. Everything seemed to be going smoothly and the weeks slipped by me, leaving without my permission. I was, of course, still attending every single lecture and recitation (barring the few I missed for tennis) and I was still finishing my psets on time. What I didn’t realize at the time was that the crack in my façade of control had already begun growing, slowly at first, like the spidery hairline fractures that race across your windshield when it gets struck by a pebble. Each hour I spent on the internet watching inane videos, each time I clicked on the Buzzfeed article about banana slicers or puppies with moustaches, each time I told myself I’d “catch up later”, was just another tiny rock being lobbed at my metaphorical windshield. And as classes started ramping up, I found myself careening towards midterms at a velocity no longer under my control. Week four was when things started to get hairy. Probably like how macaroni and cheese would be if it were made by an anthropomorphic dog that sheds all the time. My first exam of the year was for 5.13 (Organic Chemistry II) and Wednesday seemed a long ways off. I had time, right? Perhaps it was the universe trying to teach me a lesson about leaving things until the last minute, or a classic case of Murphy’s Law, but come Sunday night, my throat got that scratchy, tight feeling that is so often the harbinger of snotty, feverish misery. By Monday morning, I was fully immersed in a cloud of good old fashioned cold symptoms and I wanted nothing more than to sleep in a swathe of extra-soft blankets. So I did. Instead of spending my nights catching up on readings and lecture notes, I was catching up on sleep. Tuesday night was the first night of feverishness so by the time the morning exam rolled by, the only thing I wanted to do was roll back into bed. Even Tylenol couldn’t really bring my fever down when it peaked that night as I scrambled to finish my 20.110 (Thermodynamics) pset in one night. The unplanned sickness had smashed into my windshield with the force of a really hard kidney bean*, kicked up by the wheels of Bad Timing. Looking ahead, I knew next week that I would have a 6.0001 exam Monday night, an 8-page essay for STS.010 (Neuroscience and Society) due Tuesday and a 20.110 exam on Wednesday night, but before I had time to regroup, I hopped into a van and left campus Thursday night for tennis ITAs, playing tennis and cheering for my teammates from 8am until after dinner. Time was slipping away from me and no matter how hard I wished I hadn’t wasted so much time at the beginning of the year, there wasn’t much I could do now. Things were starting to spiral out of control. On the day of my first exam of the week, feeling as if I had not studied enough the night before, I spent my other lecture hours furiously scribbling microscopic words onto the single 8.5” X 11” cheat sheet we were allowed to have for the exam, falling even farther behind. I felt like I was sinking into quicksand: the harder I flailed, the faster I fell behind. The exam ended at 9pm and I returned to my room, stressed out an d in no mood to write a humanities paper on fMRI usage in popular media. Unfortunately, like a roly-poly reflexively curling up into a ball the second you touch it, my defense mechanisms kicked in, reacting to the stressful feelings that were washing over me in waves. Instead of getting straight to work, I dithered around for a couple of hours, hours I definitely did not have the luxury of wasting. Avoidance was the new game. It was a frustrating cycle of helplessness, stress, distress, and escapism from it all via mental disconnection. Apparently, my mind had been hardwired to fly, fast and far, instead of sticking around to fight. After an exhaustion-induced nap, I woke up at 2am and started sifting through the internet and the online readings for whatever I needed to finish my paper by Tuesday 2pm. Because caffeine makes me feel nauseated and weak at the knees, I didn’t have any chemical crutches to lean on. No outside ones at least. My own adrenaline was pulsating through my veins with head-pounding speed, a desperate biological attempt to push myself through a hellish night and morning of furious typing. At 1:54pm, I stood bleary eyed in the Maseeh Athena cluster, printing out my essay, too numb to feel relief. That night, instead of cramming for my 20.110 exam the next night, studying that I had put off until the last day, I collapsed into bed and slept for a blissful 11 hours, deciding that sleep was a more valuable commodity than the frantic throes of late night studying. The next day, cramming and cheat sheet making bled into the lecture hours of my other classes and that night, I got steam-rolled by the 20.110 exam. Lather. Rinse. Repeat. Then fast forward one week. Last Thursday night, I was at the end of a long road, my windshield smashed to bits by a thousand avoidable pebbles and my mind and body aching to shed the weight of psychological debris created, most notably, by sleep deprivation and a self-induced tenseness. The only thing standing between me and a three day weekend free from pressing due dates and the looming shadow of exams were two psets and preparation for a discussion led by me in my HASS class (are you even surprised at this point that I had left everything until the last minute?). Kidney bean number two (if you will recall kidney bean number one: my unanticipated sickness) came in the form of an overnight shift for the MIT ambulance from 11pm to 8am, the same night that I had these three things to finish. On shift, I get to hang out in the MIT-EMS bunk room in the basement of Stata until someone calls the MIT police and we get dispatched. Pset #1 (20.110) was only four questions long and took, thankfully, only thirty minutes to finish in the company of my two friends who had come with me to the bunkroom. Pset #2 (5.13) would take much longer and the preparation for my HASS would consist of 30+ pages of reading on the neuroscience of empathy. Of course, being the black cloud that I am (a term used to indicate someone who gets multiple emergency calls while on shift), we were called three times that night, once at 11:30pm, once at 3:30am, and again around 5:30am. In accordance with the numerous interruptions, interruptions I was more than happy to take though, since being an EMT is something I greatly enjoy, pset #2 was finished around 7am and HASS reading commenced immediately after. I had until 2pm to finish reading and to make a hand-out for my recitation group summarizing the readings and main ideas captured in lecture. I’ve been parroting back the same old metaphor of a slippery slope and damaged windshields in an effort to describe my situation, so I’m sure you already know what’s coming next: Lectures for other classes were spent writing up my worksheet, I fell farther behind, etcetera, etcetera. Friday was just another unwelcome instance â€" the worst kind of déjà vu. I barely made it through the presentation, my words stumbling over one another in a jittery excitement fueled by about 1 hour of sleep. I’ve been working on this post since Saturday morning, trying to paint an accurate picture of my own personal hell, trying to tell all you strangers out there how sometimes, things can just start spiraling out of control, trying, not to complain, but to explain, to understand why I let things get so far out of hand. So is there a moral to this story? Yes. If I threw in a couple more anthropomorphic characters we could call this a fable and sell it as a children’s book. As it stands, one dog making macaroni isnt quite enough to catapult it into that genre, but hopefully we can agree that, if anything, this is a cautionary tale. If not for any of you, then at least for future-Krystal. I do want to make something absolutely, and unequivocally clear: I don’t regret any of the time I spent building friendships, old and new, or doing the things that made me laugh and smile at the beginning of the year. I never want to regret the things that make me happy. People can start defining their lives and their values by numbers and quantifiable achievements, and while our society inherently places value in the physical and tangible (and by the transitive property, so must I to some extent. I’m looking at you, medical school admissions), we can’t let the intangible slip away because we’re too busy chasing that 5.0 or that title or that position. Find your balance; I’m still searching for mine. What I do regret is not prioritizing my studies over inane, time-wasting trivialities. Did I really need to watch that video clip about grilled cheese sandwiches when I should have been studying? No. No. No. Nonono. Let me repeat that in case I wasn’t clear: No. The answer being “no” for virtually any frivolous activity you could possibly want to insert into that sentence. I regret not staying on top of the lecture material and leaving unanswered questions until the last day. I regret not starting psets earlier. I regret not writing out my cheat sheets ahead of time. I regret not sleeping enough to the point where playing tennis made my stomach hurt and just staring at words made my head ache. I regret being so tired that I forgot to drink enough water. I regret not taking better care of myself. I can’t control the unexpected things in life, the things that ambush you when you least expect it, like angry kidney beans (this is perhaps not one of my finest extended metaphors but please, bear with me). What I can control is how I handle myself in every moment leading up to then. You have to prepare for the unexpected. If your life remains surprise-kidney-bean-free, then you’ll be even better off, but on the off chance that something does go wrong (as it so often does in life), you’ll be ready for it. Studying takes discipline and effort (if for you it doesn’t, then I envy you), and as I move forward in the year, hopefully leaving the slippery slope far, far behind in my rearview mirror, I’ll think back to these last three weeks and remember how little I ever want to feel this way again. I have no exams or essays this week, just three psets due on Friday, consequently, the day I leave for another weekend long tennis tournament. I’ll be spending the next few days catching up on some much needed sleep and enjoying the bounties of Monday’s apple picking adventure. It’s easy to look back on past events and point out all of your flaws and mistakes, to make promises to yourself. It’s much harder to follow through, to actually change. About three weeks ago in 6.0001, we were learning about faulty algorithms. The professor used the back of a shampoo bottle as a prime example: Lather. Rinse. Repeat. At no point is the user allowed to terminate the loop. After lathering and rinsing, they are doomed to repeat the wash cycle over and over again in an infinite loop of soapy, bubbly scrubbiness. Sometimes, people get caught up in bad habits that are in and of themselves infinite loops, habits that facilitate their own recurrence, slippery slopes that we just can’t seem to escape. The best we can do is take a moment, evaluate our situation, and most importantly, recognize that something is wrong. Maybe if we try hard enough, or if we get the right support, we can access our own source codes and reprogram the loop. Or perhaps, if it’s the right thing to do, we can terminate it altogether.

The Legacy Of Franklin Pierce Essay - 1281 Words

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Jin s Journey For Achieving His True Identity - 1151 Words

Jin’s Journey to Achieving his True Identity The average American teenager faces many obstacles when adhering to the trials and tribulations of high school life. This type of educational commitment requires academic focus, social adaptabilities, and most importantly an eagerness to achieve a self-identity. However, for Jin Wang in the graphic novel American Born Chinese this quest to achieve a self-identity becomes a focal point in the narrative (Yang). Jin is an American born Chinese boy living in the suburbs; he struggles daily with balancing his ethnic identity with his mainstream American identity. In a sense, Jin’s struggle to adapt to his surroundings causes his demeanor to take a shift. He becomes insecure about his heritage, socially isolated by others, and confused about his identity. In the quest to find an identity, in order to fit in, Jin develops unique qualities and characteristic that shapes his personality. From a social standpoint, Jin grew up in a pred ominately white suburb neighborhood and as a result had very few friends. His social skills were depleted due to the lack of friends he had. He rarely found the opportunities to develop meaningful friendships. Much of Jin’s social time in school was preoccupied by bullies. For example, during lunch time a bully came up to Jin and confronted him about his food in a rude manner the bully retorted â€Å"come on let’s leave bucktooth alone so he can enjoy Lassie† (Yang 33). This example shows the struggles Jin hadShow MoreRelatedStephen P. Robbins Timothy A. Judge (2011) Organizational Behaviour 15th Edition New Jersey: Prentice Hall393164 Words   |  1573 Pagesand permission should be obtained from the publisher prior to any prohibited reproduction, storage in a retrieval system, or transmission in any form or by any means, electronic, mechanical, photocopying, recording, or likewise. To obtain permission(s) to use material from this work, please submit a writte n request to Pearson Education, Inc., Permissions Department, One Lake Street, Upper Saddle River, New Jersey 07458, or you may fax your request to 201-236-3290. Many of the designations by manufacturersRead MoreOne Significant Change That Has Occurred in the World Between 1900 and 2005. Explain the Impact This Change Has Made on Our Lives and Why It Is an Important Change.163893 Words   |  656 Pagesframed. Morrow’s contribution here, as in his recent research and scholarship as a 6 †¢ INTRODUCTION whole, treats the two wars and their prehistory and aftermaths as genuinely global phenomena, not as conflicts among the great powers of Europe, the United States, and Japan, which has been the obsessive focus of most of the vast literature on this subject that defined much of twentieth-century history. As Carl Guarneri argues cogently in his contribution to the collection, which provides

Vital Nature Of Human Being Engineering Essay Free Essays

string(70) " Induction Motor that has been applied in finishing this undertaking\." 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. We will write a custom essay sample on Vital Nature Of Human Being Engineering Essay or any similar topic only for you Order Now 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 Statement Nowadays, 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 Aims 1.3.1 Aim The purpose of the undertaking is to command the velocity of individual stage initiation motor utilizing microcontroller. 1.3.2 Aims To 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 convertor Scope of the survey This 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 Structure There 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. You read "Vital Nature Of Human Being Engineering Essay" in category "Essay examples" 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 2 LITERATURE REVIEW A ; THEORETICAL BACKGROUND 2.1 Introduction The 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 these 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 Review Here 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 undertaking 2.2.1 Background of Induction motor Initiation 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 Motor In 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 torsion 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 Ã¢â‚¬Ë œs 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 Background In 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 Interface ) . 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 Thyristor Thyristors 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 driver 2.3.4 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 How to cite Vital Nature Of Human Being Engineering Essay, Essay examples

William Strauss Essay Example For Students

William Strauss Essay Long Swings in the Exchange Rate and the Excess Returns Puzzle:The Role of Imperfect KnowledgeThe paper is a clear breath of dirty air in the sterile world of perfect foresight. The authors offer a well worked out model of how agents persistently bid the exchange rate away from the expected long-run equilibrium rate. It seems intuitively comfortable to see the mathematical justification for the unexplained excess returns to be a function of the distance from the bench-mark (PPP). The uncertainty of a switch occurring in a regime (the Peso Problem) is an interest-ing form within which to embed the imperfect information. It is a format that seems ready to ex-pand into many other areas of economic modeling in which expectations are at the core of the models dynamics. We will write a custom essay on William Strauss specifically for you for only $16.38 $13.9/page Order now Of course, the choice of the benchmark is key to the mechanics of the process. In this case, PPP is an obvious choice but, since the idea of PPP drives this model so strongly, it is interesting to look at its place and its characteristics. In the paper, the authors note that if PPP holds, relative excess demand for domestic and foreign goods is zero. The obvious suggestion, based on the model, is that the flow of goods and services is the foundation for the equilibrating dynamic. Behind the flow of goods and services is the gap between the gap between, domestic and foreign short-term rates, and the steady state long-run interest rate gap that sets goods flows to zero. The assumption is that the prices of the domestic and foreign goods in their respective for-eign currencies are incorrect based on the fundamentals of the respective countries and that agents know this (and know that the exchange rate path is unstable) but cannot be sure of the de-gree of incorrectness or the persistenc e of the divergence. Embedded into this model are as-sumptions about PPP that provide comfort about this benchmarks ability to give the correct relative prices. It is possible that these assumptions, to some degree, mask the complexity of the situation with respect to PPPs ability to proxy relative prices. At the theoretical level, PPP should simply offer equal purchasing power for equal commodity bundles through the exchange rate. Unfortunately, the problem of explaining stylized facts requires some matching with reality. Set-tling for getting the signs right mitigates much of the angst, but, as has been demonstrated by the predictive abilities of many of the models to date, the problem is not really solved. Perhaps the model of PPP as a function of interest rates only misses somethingBut here we have a BIG step (from the real exchange rate side, not from the side of better modeling PPP) toward not only getting the signs right, but also understanding the dynamics of the switch. If PPP were built from a micro-foundation choice-based model (where demand-side ef-fects influence saving/investment and interest rates), I suspect that we might see a real conver-gence toward understanding the excess returns puzzle.

Free Essays on Genetic Engineering Of Crops

â€Å"Do you take insulin? Have you been vaccinated against hepatitis? Has anyone you know had a heart attack and been saved by a clot busting drug?† (Jaffe, 1) Genetic engineering has saved millions of lives worldwide and is nearly accepted by everyone in the medical community. The genetic engineering of crops has been used for centuries, but not until recently has it gained media attention. It gained their attention when DNA was manipulated or inserted into the crops. Before genetic engineering was capable of manipulating or inserting genes, genetic engineering was only able to express desired genes by breeding. Genetically engineered crops have provided benefits to US farmers such as herbicide resistant, disease resistant, and insect resistant crops. Although there has been a debate over the use of genetically engineered crops, careful regulation, not boycotting, can continue to provide benefits to consumers and producers. The genetic engineering of crops has created a large controversy in the United States as well as the rest of the world. Critics of genetic engineering argue that it creates numerous risks and concerns. These include environmental and ecological issues, ethical issues, animal and human health risks, and social, economic, and control issues. Supporters of biotechnology point out the direct benefits to consumers and farmers especially in underdeveloped countries. The genetic modification of crops in the United States began in the 1970s in California when scientists discovered recombinant DNA. Without going into too much detail, the recombination of DNA proceeds as follows: DNA responsible for a particular phenotype sought after is identified and isolated. Once purified the gene or genes are fused with other pieces of DNA to form recombinant DNA molecules. (Prescott, Harley, Klein, 320) In layman’s terms, it is cutting and pasting DNA to and from plants, animals, and bacteria. When crops are ï ¿ ½... Free Essays on Genetic Engineering Of Crops Free Essays on Genetic Engineering Of Crops â€Å"Do you take insulin? Have you been vaccinated against hepatitis? Has anyone you know had a heart attack and been saved by a clot busting drug?† (Jaffe, 1) Genetic engineering has saved millions of lives worldwide and is nearly accepted by everyone in the medical community. The genetic engineering of crops has been used for centuries, but not until recently has it gained media attention. It gained their attention when DNA was manipulated or inserted into the crops. Before genetic engineering was capable of manipulating or inserting genes, genetic engineering was only able to express desired genes by breeding. Genetically engineered crops have provided benefits to US farmers such as herbicide resistant, disease resistant, and insect resistant crops. Although there has been a debate over the use of genetically engineered crops, careful regulation, not boycotting, can continue to provide benefits to consumers and producers. The genetic engineering of crops has created a large controversy in the United States as well as the rest of the world. Critics of genetic engineering argue that it creates numerous risks and concerns. These include environmental and ecological issues, ethical issues, animal and human health risks, and social, economic, and control issues. Supporters of biotechnology point out the direct benefits to consumers and farmers especially in underdeveloped countries. The genetic modification of crops in the United States began in the 1970s in California when scientists discovered recombinant DNA. Without going into too much detail, the recombination of DNA proceeds as follows: DNA responsible for a particular phenotype sought after is identified and isolated. Once purified the gene or genes are fused with other pieces of DNA to form recombinant DNA molecules. (Prescott, Harley, Klein, 320) In layman’s terms, it is cutting and pasting DNA to and from plants, animals, and bacteria. When crops are ï ¿ ½...

60 Best Research Paper Topics Great Ideas for Writing a Winning Paper

60 Best Research Paper Topics Great Ideas for Writing a Winning Paper Think over a topic for writing your research paper on? Look through the list of 60 research paper topics to find the idea. If you are looking for a list of good research paper topics, youve come to the right place. We have written some of them for you, just pick the category you like or need to write your research paper on and  choose the topic for yourself. Psychology Post Traumatic Stress Disorder and Depression Borderline Personality Disorder in Females Borderline Personality Disorder in Adolescents Bipolar Disorder Anxiety Disorders Substance Use Disorder and Professional Athletes Meditation: What Role Does This Have in Psychology in the Year 2013? 8.Where in the World is Neuropsychology Headed? English and Humanities Religion and Conflict throughout American History The Life of Buddha Compared to the Life of Jesus How Would Shakespeare Be Different if He Were Born in the Year 2000? Mozart and Bach – Their Life and Times How to Write on a Controversial or Sensitive Topic Is That a Colon or Semi-Colon? The Development of Language Discuss Plato and His Theory of the Cave Science The Structure of Cells and Microbes Germs: What They Are and Why We Need Them What Is the Difference between a Medical Doctor and a Psychiatrist? What Is the Difference between a Medical Doctor and a Chiropractor? Is Acupuncture a Viable Alternative Medicine? Yoga and Modern Science What Would Life on a Colony on Mars be Like? Should the Rules of the National Football League Be Changed to Protect Players from Concussions? Is it True that You Can Make Statistics Say What You Want? Einstein Crazy Genius Newton and the Law of Gravity Discuss Why Modern Science is Evaluating Ancient Treatments for Improved Health World History: The French Revolution – What Was It about Marie Antoinette? The Cold War – US vs. Soviet Union Round One Why Did the Warsaw Pact Develop? The Magna Carte The Founding Fathers – Rebels or Freedom Fighters The Vision of the Founding Fathers The Middle East – The Conflicts and Parties 8.The Creation of Israel and How This Affected the Middle East The United Nations and the Security Council – Effective or Ineffective Who Was Galileo and Why Was He Important? Did Leonardo Da Vinci Invent the Airplane? Explain the Relationship between North Korea and South Korea Explain the Relationship between China and Japan What Is the Precipitant Event that Led to World War I? Explain the Rape of Nanking Law: How Does the First Amendment Affect Life in 2013? At Eight Years Old, Should a Child Be Charged with Murder? Drug Trafficking and Narco-States DEA v. FBI What Is the Most Important Recent Supreme Court Ruling? Has the Executive Branch Eclipsed the Judicial Branch? How Did Brown v.  Change The Board of Education in the United States? Texting while Driving – A Misdemeanor? How Mothers Against Drunk Drivers (MADD) Changed the Way We View DUI/DWI Should the Speed Limit Go Back to 55MPH? General: How Has the Cell Phone Changed Society? Have Computers Complemented the Office Environment and Led to a Reduced Work Week? How Has the Workplace Evolved since 1980? Performance Enhancing Drugs and Cheating Is the Rate Alcohol Is Absorbed into the Body the Same for a 100-pound Non-Drinker as It Is for a 175-pound Drinker? Why Is the Sand Disappearing on the Beaches of Miami? Great White Shark Attack Clusters – What Is Driving the Predators? Should you need assistance with your research paper writing, we are here to help. Just email your research paper instructions to our support staff and they will be ready to help. Even if you dont see any topic that you like, our writers are able to help you in your order form simply write that you need help with a research paper topic, and our writer will start coming up with different topics. Once you see the topic that you need, let us know and we will assign that specific writer to work on your project. We guarantee that you will enjoy the process. is the service you can trust!