Rhetoric and Organizational Method Works Free Essays

Expository Modes Quiz Complete the accompanying outline to distinguish the reason and structure of the different explanatory modes utilized in scholastic composition. Give at any rate two hints to composing each sort of expository gadget. Logical mode Reason Clarify when or why each explanatory mode is utilized. We will compose a custom article test on Talk and Organizational Method Works or on the other hand any comparable subject just for you Request Now Structure Clarify what authoritative strategy works best with each explanatory mode. Tips Give two hints to writing in each expository mode. Portrayal The motivation behind portrayal is to recount to a story whether it is verifiable or fiction. Having a plot, characters, protagonise, clashes, and topic. Solid subtleties like how every one of our faculties enteracts with various individuals, spot or things. Likewise make a point to have a guide for your story whether it is genuine, fiction or both. Representation Portrayal Arrangement Procedure examination Definition Correlation and complexity Circumstances and logical results Influence Select one of the points beneath and decide in any event one logical mode that would be suitable for tending to the subject you chose. Compose 100 to 150 words clarifying the theme you chose, the explanatory mode, and why you think this mode is generally suitable for tending to your point. Contamination Work environment proposition for another activity Contending to change a law Building another park in your town Environmental change Profile of your closest companion or a relative I might want to disclose contamination to you by demonstrating you the reason and impacts, since thusly you will realize what may cause contamination and how it impacts us. Since contamination is one of the significant issue that we have today, it is significant that we do what we can to limit it with the goal that we can let the cutting edge experience this wonderful universe of our own. Instructions to refer to Rhetoric and Organizational Method Works, Papers

For A Crush free essay sample

At the point when I think back four years prior, I am essentially surprised by what I’ve accomplished etymologically. Four years back, composing this paper would have been incomprehensible; four years prior, the main English words I knew were ‘hello’, ‘yes’ and ‘no’. Four years prior, applying to an American college could never have skimmed my psyche. To each story, there is a start: Mine beginnings when my dad, upon a pleasant bright day, abruptly chose to enlist me in an American secondary school. Moving from Congo to Morocco had just been a trial and here was my dad, placing me in another circumstance of hardship. At the point when he reported his choice to me, I attempted to give him my best addressing look, as though to illuminate him that he was going crazy. â€Å"I’m a French-speaker!† my eyes shouted however my mouth remained shut, fixed by a never-ending feeling of dread for the man. We will compose a custom article test on For A Crush or on the other hand any comparative subject explicitly for you Don't WasteYour Time Recruit WRITER Just 13.90/page In any case, my dear dad was too bolted in his new habit to take note. I attempted to look for help in my mom yet it appeared my father’s excitement had persuaded her. â€Å"Learning English will offer you numerous opportunities† my dad lectured. â€Å"The most ideal approach to learn is to be in an English environment†. In spite of this enthusiasm my dad was showing towards my siblings and I setting off to an American school, I despite everything was doubtful. Also, around then, I could think less about the open doors a language would offer me. Notwithstanding, the ace of the house had taken his choice and I needed to withstand to it. Summer went in a matter of seconds and as the main day of school drew closer, I felt increasingly more worried about everything. How might I oversee being in a school where the majority of the individuals wouldn’t get me? I was frantic at my folks for setting me into this snare; into this place where there is destruction. Ho w might I figure out how to impart and make new companions? In my little multi year-old mind, plans of vengeance against my folks grew: Play idiotic and not attempt by any means. In the event that I could demonstrate to my folks that being in an American school wasn’t useful for me, maybe would they set me back in an ordinary French school? It is on that revolted note that I began my first year at American Academy Casablanca. Out of the blue, being on an alternate arrangement of instruction wasn’t horrendous by any means. The vast majority of the understudies talked both French and English and would enable me to make an interpretation of what I needed to state and what the instructors were stating. My siblings cherished it as well. It was something other than what's expected that engaged them. Be that as it may, I didn’t need to abandon my arrangement. I put forth no attempt in procuring new dialect abilities and wasn’t anticipating doing any†¦ until I met her. Her name was Amna and she was a Pakistani young lady. At the point when I initially met her, I was promptly enchanted. She had so much thoughtfulness and warmth in her that I basically needed to be her friend†¦ or more. In any case, something wasn't right: I couldn’t convey. This changed my point of view of being in an American school and of communicating in English when all is said in done. I detested myself since I couldn’t communicate in English and more since I couldn’t address her! My failure to communicate in English rendered me confused before her. The best move I could oversee was an extra-generously grin and she would just answer that with her warm and kind smiles. This tore me. I got desirous at different understudies that could talk both French and English; I needed to resemble them! Books, word references, CDs and DVDs! I got them all. It needed to occur; I needed to ace English! My choice was taken and I battled to make my goals mat erialize. My folks were all glad and steady and I didn’t think about my dad as idiot any longer. He was correct: English could open numerous chances. What's more, around then, the open door I needed to have was to converse with this young lady. After a semester, my English began to improve and the more I found out about it, the more I got entranced by it. English was excellent, I understood. I loved it. As I turned out to be increasingly more familiar with it, I began to speak with Amna and we became incredible companions. In becoming more acquainted with Amna, I found a wise and knowledgeable young lady whose English streamed splendidly into wonderful sentences. The basic truth of being her companion tested me. I went from needing to have the option to speak with her to needing to be superior to her. As a result of Amna, I propelled myself harder, rehearsed considerably more so as to contact her level. Amna has been the charge of my energy for the English language. We despit e everything are incredible companions and she yet knows the effect she’s had on me. As it were, it is on account of her that I am ready to compose this paper. At the point when I consider the past, it is with a grin that I perceive what one could accomplish for a pulverize.

The Safety of St. Johns Wort for Bipolar Disorder

The Safety of St. John's Wort for Bipolar Disorder Bipolar Disorder Treatment Medications Print Why You Shouldnt Use St. Johns Wort for Bipolar By Marcia Purse Marcia Purse is a mental health writer and bipolar disorder advocate who brings strong research skills and personal experiences to her writing. Learn about our editorial policy Marcia Purse Updated on January 04, 2020 Bipolar Disorder Overview Symptoms & Diagnosis Causes Treatment Living With In Children Your Rights St. Johns Wort Controversy. Mario Tama / GettyImages St. Johns wort (SJW) has a beautiful flower, but could it be dangerous for bipolar disorder sufferers? The herbal supplement is most commonly made from the species Hypericum perforatum, a perennial weedy type and this is whats used for the treatment of mild depression. Although clinical trials are ongoing for this increasingly popular herbal supplement, it seems clear that for mild depression, St. Johns wort may be an effective treatment. However, there are factors that indicate that this herb should not be used by persons who have bipolar disorder. For example, it has been designated as a noxious weed because grazing animals who eat this plant can become hypersensitive to sunlight which may also affect humans. What Is St. Johns Wort Used For and Can It Benefit You? Why St. Johns Wort Is Not Advised for Bipolar Disorder Patients The following reasons are cited as to why St. Johns wort is not recommended for people with bipolar disorder. Serotonin Syndrome Camilla Cracchiolo, R.N., who is studying St. Johns wort in-depth, has found that patients using the herb all reported a gradual onset of dizziness, cognitive difficulty, faintness when standing or walking, unsteadiness when walking, muscle spasms and a racing heartbeat. Because St. Johns wort may increase the amount of serotonin available, combining the herb with an SSRI such as Prozac or Paxil is not recommended. How Serotonin Syndrome Is Diagnosed and Treated Mania Trigger It is well known that any antidepressant, when taken without a mood stabilizer, can set off a manic or hypomanic episode. Some people never exhibit mania at all until treated for depression with a triggering drug. Since St. Johns wort acts as an anti-depressant, there is good reason to exercise caution. Researchers at Harvard Medical School and the University of Michigan have issued warnings regarding St. Johns wort as a possible triggering substance. Published case reports have documented several cases of sudden onset of mania in bipolar patients who were using the herbal supplement. How to Recognize a Manic or Hypomanic Episode Drug Interactions In February of 2000, the US Food and Drug Administration released a Public Health Advisory warning that there was a risk of dangerous interactions between St. Johns wort and certain prescription medications. Researchers found that the use of St. Johns wort significantly reduces the effectiveness of some AIDS medications (indinavir and other antiretroviral agents). Because of the way St. Johns wort operates in the body, the FDA also warned that it may also be unsafe to take it along with some common medications for heart disease, transplant rejection, and cancer, among others. Drugs mentioned by name that is used in the treatment of mood disorders were: The tricyclic antidepressants ?Tofranil (imipramine), Asendin (amoxapine), and Elavil (amitriptyline);The anti-seizure medication Tegretol (carbamazepine), used as a mood stabilizer; andThe cancer medication Tamoxifen, which is being studied as a mood stabilizer. It would be safer to assume that other drugs related to these would also be in the same category, including other tricyclics such as Vivactil (protriptyline) and Pamelor (nortriptyline) and the mood stabilizer ?Trileptal (oxcarbazepine). St. Johns Wort Drug Interactions With Antidepressants The Bottom Line For a number of reasons, then, the bottom line with St. Johns wort for persons with manic-depressive illness should be Better safe than sorry. If you or someone you love who is bipolar insists on using this supplement, use extreme caution. Notify your physician or psychiatrist, and be on the lookout for any complications and changes in mood or behavior that could be dangerous.

English As The World Language - 819 Words

Introduction With the development of living standard in society, studying aboard has become more and more popular. Not only because of English as the world language is an agent to connect countries, but also speaking English fluently will be beneficial for the future personal development. In order to study oversea smoothly, the first step is to go through the language--English. Generally speaking, English has been divided into two different types according to the purposes which are English for Academic Purpose (EAP) and General English (GE). It is obvious that EAP teaches the knowledge which will be suitable for a higher education whereas GE is mainly focus on daily communications. Therefore, the teaching style or perhaps teacher’s role in the class is also different. In this essay, the writer will illustrate two different classifications by Harmer and Scrivener, after compare and contrast the two the teacher’s role, the writer will select one of the classification and justify it. F inally, the chosen classification will be put into practice ( justifying with the radios provided). Teacher’s role As we know, the traditional English Language Teaching (ELT) often comes in many varieties, but is often characterized by the teacher spending quite a lot of class time using the board to explain things-as if ‘transmitting’ knowledge to the class(Scrivener, 2011, p14). The teacher’s role according to Scrivener has been put forward into three categories. The first one can beShow MoreRelatedThe World Of Reading And The English Language1983 Words   |  8 Pagesparent whose first language is not English. Learning how to read can get pretty interesting when you’re trying to wander into the world of reading and the English language. However, this small obstacle never stopped me from learning how to read or even from reading at all. Now that I am eighteen years old, I have a big love for reading. Reading is a virtual escape that allows me to jump into many alternate universes. My journey to the world of reading and the English language was not a smooth oneRead MoreHow The Mix Of Languages And The English Language Into The World1060 Words   |  5 PagesHow to Tame a Wild Tongue, was a very interesting essay, she combined both the Spanish and the English language into the essay. As a native from Puerto Rico and living in the United States, I have faced some of the problems that the author mentions in this essay. I will discuss how the mix of languages and the fragmented character of the text put a demand on me as the reader, in what sense is my reading experience similar to what Anzaldua calls the â€Å"Borderland†, and how my position on the borderRead MoreEvolution of the English Language and the Emergence of â€Å"World Englishes† 1228 Words   |  5 PagesEvolution of the English Language and the Emergence of â€Å"World Englishes† As technology is bringing the world closer together, increasing the contact between peoples of different languages and cultures, the English language has established itself as the tool for communication, becoming the lingua franca of today’s globalized society. This role that English has taken can be traced back to a unique evolutionary history that should be understood on two separate levels. This first level of evolutionRead MoreWhat Are the Importance of English Language in This Modern World2756 Words   |  12 Pagesthe importance of english language in this modern world In recent years, English is more and more popular in the world. It attracts people due to the interestingness in its tune and structure. However, beside the tune and the stucture, this language is learned and studied by a higher number of people with every passing day because of its two importances in this modern world: a mean to communicate and to creat a greater opportunity for a job. The first importance of English language is that it is aRead MoreThe Impact of English Language on Contemporary World: a Global Perspective5257 Words   |  22 PagesSeptember 2012, ISSN 2278-4853 THE IMPACT OF ENGLISH LANGUAGE ON CONTEMPORARY WORLD: A GLOBAL PERSPECTIVE G. RAJA SEKHAR* *Assistant Professor, Department of English, Krishnaveni Engineering College, Narasaraopet, Andhra Pradesh, India. ABSTRACT Language has been affected by the significant trend of globalization considerably in the last two decades. Literally, we have revolutionary changes in communication and technology in 21st century and language has played a vital role to enable us to achieveRead MoreHistorical And Contemporary Meaning Of The English Language Becoming The World s Common Language2391 Words   |  10 PagesKraig Krause Professor Dani Spinosa English 4400 29 July 2016 Research Essay In this essay, I will explain the historical and contemporary meaning of the English language becoming the world s common language. I have chosen three texts, which are written by various scholars in the culture and linguistic realm, who have different insights and opinions of the dominance of the English language. I will integrate Ngugi Et Al’s work of, On The Abolition of the English Department in relation to linguist’sRead Moreâ€Å"Why a Global Language† More than one billion people in the world speak English. English is quickly1000 Words   |  4 Pagesâ€Å"Why a Global Language† More than one billion people in the world speak English. English is quickly becoming the dominant language by which the world communicates. It is being referred to as the global language because it is seen as a common means for interaction between different countries. Almost everywhere in the world you can find English: it is the most taught in the world and probably one of the the most commonly used languages by politicians all around the world. While this phenomenon canRead MoreWilliam Shakespeare s Hometown Of The English Language And The World s Best Dramatist1266 Words   |  6 Pagesbusinessman in his hometown of Stratford, William Shakespeare is recognized as the greatest writer in the English language and the world s best dramatist. (www.goodreads.com) He wrote hundreds of songs, plays, books, and poems. During his time, his plays were well under-appreciated and a lot of his work did not appear until seven years after his death. Without Shakespeare, the English language wo uld have never expanded at the rate it did, erasing many common words and phrases from history. No otherRead MoreThe Growth and Importance of English as a Global Language - How English developed from its origins until today. Discusses why it is now the most widely-learned language in the world.2608 Words   |  11 Pagesglobal language, is a language which has been given a specific place within countries and communities around the world, even in places where there are very few native speakers of this language. Although English is not the most widely spoken language in the world in terms of the number of native speakers - there are many more native Chinese speakers than native English speakers - it is described as a global language and Chinese is not. This is because there are few other communities in the world thatRead MoreWhy Is English Language Throughout The Stage Of Globalization Important? How Will It Affect Today s World? Essay2399 Words   |  10 PagesWhy is English langua ge in this stage of globalization important? How will it affect today’s world? Introduction Language is a means of communication. It is the code we use to express ourselves and communicate with others. Language represents thoughts and ideas and it can be communicated through spoken, written and signed forms. Conventional symbols or sounds are also used to communicate. Language is an important part of our being, and English is one of the most important languages to learn. English

Pablo Picassos Gruernica Essay examples - 914 Words

In 1937, Pablo Picasso depicts an epic event in history in his Guernica using visual symbolism, line, space, light and color which advocates to the observer the truth behind the subject matter of the artwork itself. The line used leads to specific images to tell the story; the space throughout the work is filled with many jagged and sharp shapes with an odd use of positive and negative space. The light and color illuminate the actual scene. Knowing and understanding how the artist uses these three fundamental tools will guide us to the meaning and logic of the artwork. Pablo Picassos use of line gives a sense of direction almost as key to unlock the meaning of the artwork. In our culture we read from left to write. The artist†¦show more content†¦Now combined with the images of the candle, the light fixture and the horse we gather that, by definition, the horse is the most economically important domesticated animal and was diminished due to mechanization. The candle next to the light shows us a change in technology, advocating the death of the horse with a spear in the side, as the destruction of Spains cultural origins. Finally we see the horse leading us back to the bull where between both heads we see the spirit flying away alerting us that soul and spirit is being ripped away, that death is coming no matter if it is in a bull fight or a battle, everything that lives will die. Picassos use of space in this masterpiece leads to similar conclusions to pain, suffering and the eventual death of an ancient city or any living thing. This piece is extremely vivid and the use of space used is probably breaking all the rules of art, but if we think about what we are actually seeing we are not really looking at just art, we are looking at inhumane events in the world and it almost holds an obligation to exploit the boundaries of art to get the desired effect which the artist has done intentionally. Most art works contains non busy and busy areas which are proportional to one another but in life we know that the main focus in the real world is all the chaos and that there is no balance just that tunnel vision effect of the awe stricken horror. Even in the use of light and color Picasso conveys the

A brief description of the arts Free Essays

â€Å"What is art?† Different people can come up with different answers to this question, and they can all be correct. This reflects the dilemma that has hounded the concept of art from the first time man attempted to define it. As society evolves art does, too; as such, to attempt to place boundaries around art is as futile an exercise as to define the former, since both share the characteristic of perpetual change. We will write a custom essay sample on A brief description of the arts or any similar topic only for you Order Now With this fact in mind, I have decided to limit the references used in this paper to sources that are not only up-to-date but likewise education-related.   Solely for the purposes of coherence and clarity, I have chosen to adopt the standards set by the revised North Carolina Arts Education Standard Course of Study (http://www.ncpublicschools.org/docs/curriculum/artsed/scos/artsed.pdf) and the Arts Education Mandate of the Washington OSPI [Office of Superintendent of Public Instruction] which provided a chart of the elements and principles of organization of the subjects to be discussed. It is my belief that an exposition of the subjects of painting, dance, theater, and music done along the lines of education is more relevant than any discussion done in another perspective. I will begin my discussion with the subject of painting. Painting is a branch of the visual arts – this alone sets it apart from the other three subjects, which are all branches of the performing arts. The Encarta encyclopedic entry (2005 edition) for painting defines it as an art wherein â€Å"color, derived from any of numerous organic or synthetic substances, is applied to various surfaces to create a representational or abstract picture or design†. There are quite a number of techniques in painting that correspond to the medium used by the artist, the most popular of which are as follows: oil, fresco, tempera, enamel, encaustic, gouache, grisaille, watercolor, and acrylic. There is another way of classifying painting styles, and that is through the subject (what is depicted) of the work. Mural paintings, still life paintings, icon paintings, and miniature paintings are some of the categories under which a work may be classified. In this discussion it is important to cover drawing – another branch or form of visual art – briefly, since painting employs the basic principles in drawing. To quote the entry for â€Å"drawing† in the Encarta encyclopedia: â€Å"In drawing from any object or model, the first step is to observe and sketch in the dominant structural lines, contours, and masses. The more important details are added and corrected, and the minor details are left to the last.† This approach is likewise often used by painters. As for the elements in painting, I have taken the liberty of taking on the elements prescribed by the Arts Education Mandate of the Washington OSPI, which are as follows: (1) color, (2) form, (3) line, (4) shape, (5) space, (6) texture, and (7) value/shading. These elements – with the exception of space – are unique to the art of painting as far as the other subjects of this paper are concerned because simplistically speaking, the said elements are applicable only to the visual, and not the performing arts. Music concerns the arrangement of sounds artistically over a period of time. As in painting, the field of techniques (or means of expression) for this particular art form is vast. Perhaps this is due to the fact that the world is divided into musical cultures, with each culture carrying a distinct sound and a distinct method of producing music. Aside from that, with the steady progress of technology came the intermarriage of cultures, which in turn paved the way for an expansion in the methods by which a person can express himself musically. I found more than twenty types of musical compositions, but for the sake of brevity let me just mention a few: aria, ballad, chant, hymn, sonata, symphony, and the tone poem.   Although there is an overwhelming number of techniques of execution in music, all these share the same elements: (1) beat / rhythm, (2) expression [dynamics, style, tempo, phrasing], (3) form, (4) harmony, (5) melody, (6) notation, (7) pitch, (8) texture, (9) timbre / tone color. How to cite A brief description of the arts, Papers

Learning Curve free essay sample

Learning curve in psychology and economics The first person to describe the learning curve was Hermann Ebbinghaus in 1885. He found that the time required to memorize a nonsense word increased sharply as the number of syllables increased. [l] Psychologist, Arthur Bills gave a more detailed description of learning curves in 1934. He also discussed the properties of different types of learning curves, such as negative acceleration, positive acceleration, plateaus, and ogive curves. 2] In 1936, Theodore Paul Wright described the effect of learning on labor productivity in the aircraft industry and proposed a mathematical odel of the learning curve. [3] The economic learning of productivity and efficiency generally follows the same kinds of experience curves and have interesting secondary effects. Efficiency and productivity improvement can be considered as whole organization or industry or economy learning processes, as well as for individuals. The general pattern is of first speeding up and then slowing down, as the practically achievable level of methodology improvement is reached. We will write a custom essay sample on Learning Curve or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page The effect of reducing local effort and resource use by learning improved methods paradoxically ften has the opposite latent effect on the next larger scale system, by facilitating its expansion, or economic growth, as discussed in the Jevons paradox in the 1880s and updated in the Khazzoom-Brookes Postulate in the 1980s. edit] Broader interpretations of the learning curve Initially introduced in educational and behavioral psychology, the term has acquired a broader interpretation over time, and expressions such as experience curve, improvement curve, cost improvement curve, progress curve, progress function, startup curve, and efficiency curve are often used interchangeably. In economics the subject is rates of development, as development refers to a whole system learning process with varying rates of progression. Generally speaking all learning displays incremental change over time, but describes an S curve which has different appearances depending on the time scale of observation. It has now also become associated with the evolutionary theory of punctuated equilibrium and other kinds of revolutionary change in complex systems generally, relating to innovation, organizational behavior and the management of group learning, among other fields. 4] These processes of rapidly emerging new form appear to take place by complex learning within the systems themselves, which when observable, display curves of changing rates that accelerate and decelerate. edit] Common terms The familiar expression steep learning curve may refer to either of two aspects of a pattern in which the marginal rate of required resource investment is initially low, perhaps even decreasing at the very first stages, but eventually increases without bound. Early uses of the metaphor focused on the patterns positive aspect, namely the potential for quick progress in learning (as measured by, e. . , memory accuracy or the number of trials required to obtain a desired result)[5] at the introductory or elementary stage. 6] Over time, however, the metaphor has become more commonly used to focus on the patterns negative aspect, namely the difficulty of learning once one gets beyond the basics of a subject. In the former case, the steep[ness] characterizing the overall amount learned versus total resources invested (or versus time when resource investment per unit time is held constant)†in mathematical terms, the initially high positive absolute value of the first derivative of that function. In the latter case, the metaphor is inspired by the patterns eventual behavior, i. e. , its behavior at high values of overall resources invested (or of overall time invested when resource investment per unit time is held constant), namely the high rate of increase in the resource investment required if the next item is to be learned†in other words, the eventually always-high, always-positive absolute value and the eventually never-decreasing status of the first derivative of that function. In turn, those properties of the latter function dictate that the function measuring the rate of earning per resource unit invested (or per unit time when resource investment per unit time is held constant) has a horizontal asymptote at zero, and thus that the overall amount learned, while never plateauing or decreasing, increases more and more slowly as more and more resources are invested. This difference in emphasis has led to confusion and disagreements even among learned people. 7] The most effective solution to problems arising from a steep learning curve is to find a different method of learning that features a differently shaped (or at least less steep) curve. Such a discovery, often characterized as an aha! moment or breakthrough, often results from a seemingly radical intuitive change in direction. [citation needed] [edit] Learning curve models The page on learning experience curve models offers more discussion of the mathematical theory of representing them as determinis tic processes, and provides a good group of empirical examples of how that technique has been applied. edit] General learning limits Learning curves, also called experience curves, relate to the much broader subject of natural limits for resources and technologies in general. Such limits generally present themselves as increasing complications that slow the learning of how to do things more efficiently, like the well-known limits of perfecting any process or product or to perfecting measurements. [8] These practical experiences match the predictions of the Second law of thermodynamics for the limits of waste reduction generally. Approaching limits of perfecting things to eliminate waste meets geometrically increasing effort to make progress, and provides an environmental measure of all factors seen and unseen changing the learning experience. Perfecting things becomes ever more difficult despite increasing effort despite continuing positive, if ever diminishing, results. The same kind of slowing progress due to complications in learning also appears in the limits of useful technologies and of profitable markets applying to Product life cycle management and software development cycles). Remaining market segments or remaining potential efficiencies or efficiencies are found in successively less convenient forms. Efficiency and development curves typically follow a two-phase process of first bigger steps corresponding to finding hings easier, followed by smaller steps of finding things more difficult. It reflects bursts of learning following breakthroughs that make learning easier followed by meeting constraints that make learning ever harder, perhaps toward a point of cessation. Ђ Natural Limits One of the key studies in the area concerns diminishing system limits for resource development or other efforts. The most studied of these may be Energy Return on Energy Invested or EROEI, discussed at length in an Encyclopedia of the Earth article and in an OilDrum article and series also referred to s Hubert curves. The energy needed to produce energy is a measure of our difficulty in learning how to make remaining energy resources useful in relation to the effort expen ded. Energy returns on energy invested have been in continual decline for some time, caused by natural resource limits and increasing investment. Energy is both natures and our own principal resource for making things happen. The point of dimininishing returns is when increasing investment makes the resource more expensive. As natural limits are approached, easily used sources are exhausted and nes with more complications need to be used instead. As an environmental signal persistently dimishing EROI indicates an approach of whole system limits in our ability to make things happen. Ђ Useful Natural Limits EROEI measures the return on invested effort as a ratio of RII or learning progress. The inverse IIR measures learning difficulty. The simple difference is that if R approaches zero R/ will too, but IIR will approach infinity. When complications emerge to limit learning progress the limit of useful returns, uR, is approached and R-uR approaches zero. The difficulty of seful learning 1/(R-uR) approaches infinity as increasingly difficult tasks make the effort unproductive. That point is approached as a vertical asymptote, at a particular point in time, that can be delayed only by unsustainable effort. It defines a point at which enough investment has been made and the task is done, usually planned to be the same as when the task is complete. For unplanned tasks it may be either foreseen or discovered by surprise. The usefulness measure, uR, is affected by the complexity of environmental responses that can only be measured when they occur unless they are foreseen.