Quotes about diagram

A collection of quotes on the topic of diagram, use, likeness, books.

Quotes about diagram

“One day I went alone to the river to enjoy myself as usual. When I was a short distance from the masonry, however, I was horrified to observe that the water had risen and was carrying me along swiftly.… The pressure against my chest was great and I was barely able to keep my head above the surface.… Slowly and gradually I became exhausted and unable to withstand the strain longer. Just as I was about to let go, to be dashed against the rocks below, I saw in a flash of light a familiar diagram illustrating the hydraulic principle that the pressure of a fluid in motion is proportionate to the area exposed and automatically I turned on my left side. As if by magic, the pressure was reduced.”

Nikola Tesla (1856–1943) Serbian American inventor

My Inventions (1919)

Light, Water

“To show this diagram properly, I would really need a four dimensional screen. However, because of government cuts, we could manage to provide only a two dimensional screen.”

Stephen Hawking (1942–2018) British theoretical physicist, cosmologist, and author

The Beginning of Time (1996)

“One afternoon, which is ever present in my recollection, I was enjoying a walk with my friend in the city park and reciting poetry. At that age I knew entire books by heart, word for word. One of these was Goethe's Faust. The sun was just setting and reminded me of a glorious passage:
Sie rückt und weicht, der Tag ist überlebt,
Dort eilt sie hin und fördert neues Leben.
O! daß kein Flügel mich vom Boden hebt,
Ihr nach und immer nach zu streben!
Ein schöner Traum, indessen sie entweicht.
Ach! zu des Geistes Flügeln wird so leicht
Kein körperlicher Flügel sich gesellen![The glow retreats, done is the day of toil;
It yonder hastes, new fields of life exploring;
Ah, that no wing can lift me from the soil
Upon its track to follow, follow soaring!
A glorious dream! though now the glories fade.
Alas! the wings that lift the mind no aid
Of wings to lift the body can bequeath me.
(tr. Bayard Taylor)
As I uttered these inspiring words the idea came like a flash of lightning and in an instant the truth was revealed. I drew with a stick on the sand the diagram shown six years later in my address before the American Institute of Electrical Engineers, and my companion understood them perfectly. The images I saw were wonderfully sharp and clear and had the solidity of metal and stone, so much so that I told him, "See my motor here; watch me reverse it."”

Nikola Tesla (1856–1943) Serbian American inventor

I cannot begin to describe my emotions. Pygmalion seeing his statue come to life could not have been more deeply moved. A thousand secrets of nature which I might have stumbled upon accidentally, I would have given for that one which I had wrested from her against all odds and at the peril of my existence …

On the Invention of the Induction Motor
My Inventions (1919)

Sun, Dreams, Heart, Truth

“What fabrications they are, mothers. Scarecrows, wax dolls for us to stick pins into, crude diagrams. We deny them an existence of their own, we make them up to suit ourselves -- our own hungers, our own wishes, our own deficiencies.”

Margaret Atwood book The Blind Assassin

Source: The Blind Assassin

Hunger

“Across the room, Hale smiled slightly. 'We can draw you a diagram if you need it.'

'No thanks,' Nick said. 'I think I've got everyone but you.”

Ally Carter book Heist Society

Source: Heist Society

Smile, Thinking, Drawing

“Tell me, if I take you to my room and put you in my bed, what do you think would happen?"

"I can draw you a diagram. Hint: I'm slot B, and you're tab A.”

Kresley Cole American writer

Source: Dreams of a Dark Warrior

Thinking, Drawing

“I can draw you a diagram. Hint: I'm slot B, and you're tab A.”

Kresley Cole American writer

Source: Dreams of a Dark Warrior

Drawing

“I really do not know that anything has ever been more exciting than diagramming sentences.”

Gertrude Stein (1874–1946) American art collector and experimental writer of novels, poetry and plays

Source: Lectures in America

“We have already various treatises on Mechanics, but the plan of this one is entirely new. I intend to reduce the theory of this Science, and the art of solving problems relating to it, to general formulae, the simple development of which provides all the equations necessary for the solution of each problem. I hope that the manner in which I have tried to attain this object will leave nothing to be desired. No diagrams will be found in this work. The methods that I explain require neither geometrical, nor mechanical, constructions or reasoning, but only algebraical operations in accordance with regular and uniform procedure. Those who love Analysis will see with pleasure that Mechanics has become a branch of it, and will be grateful to me for having thus extended its domain.”

Joseph Louis Lagrange book Mécanique analytique

Mécanique analytique (1788) as quoted by E. W. Hobson, Mathematics, from the points of view of the Mathematician and of the Physicist (1912) an address delivered to the Mathematical and Physical Society of University College London, p.13. https://books.google.com/books?id=H7Y_AQAAIAAJ&pg=PA13

Love, Pleasure, Hope, Art

“Creating a modeling language that is also an executable language has long been a goal of the software community. Many years ago, in 1968 to be exact, while working with software components to successfully develop a telecommunications system, we created a modeling language that was the forerunner to UML. To model components we used sequence diagrams, collaboration diagrams, and state transition diagrams (a combination of state charts and activity diagrams). Our modeling language then seamlessly translated the component models into code. Each code component was in its turn compiled into an executable component that was deployed in our computer system. The computer system was a component management system—thus we had "components all the way down."”

Stephen J. Mellor (1952) British computer scientist

Source: Executable Uml: A Foundation for Model-Driven Architecture, 2002, p. xxiii: Foreword.

Way, Communication

“The life of the spirit may be fairly represented in diagram as a large acute-angled triangle divided horizontally into unequal parts with the narrowest segment uppermost. The lower the segment the greater it is in breadth, depth, and area.”

Wassily Kandinsky (1866–1944) Russian painter

III. The Movement of the Triangle
1910 - 1915, Concerning the Spiritual in Art, 1911

Life, Parting

“Conversation once colored by esteem
Became dialogue as a diagram of a play for blood.
Took a vacation, my palate got clean.
Now I could taste your agenda
While you're spitting your cud.”

Fiona Apple (1977) singer-songwriter, musician

Not About Love
Song lyrics, Extraordinary Machine (2005)

Color

“Science does not speak of the world in the language of words alone, and in many cases it simply cannot do so. The natural language of science is a synergistic integration of words, diagrams, pictures, graphs, maps, equations, tables, charts, and other forms of visual and mathematical expression… [Science thus consists of] the languages of visual representation, the languages of mathematical symbolism, and the languages of experimental operations.”

Jay Lemke (1946) American academic

Jay Lemke (2003), "Teaching all the languages of science: Words , symbols, images and actions," p. 3; as cited in: Scott, Phil, Hilary Asoko, and John Leach. "Student conceptions and conceptual learning in science." Handbook of research on science education (2007): 31-56.

World, Mathematics, Nature, Science

“If a fish is the movement of water embodied, given shape, then cat is a diagram and pattern of subtle air.”

Doris Lessing book Particularly Cats

Particularly Cats, ch. 2 (1967)

Cats, Fish, Water

“Plato, too, at the end of the thirteenth book of the Laws, to which some give the title The Philosopher… adds: "Every diagram, system of numbers, every scheme of harmony, and every law of the movement of the stars, ought to appear one to him who studies rightly; and what we say will properly appear if one studies all things looking to one principle, for there will be seen to be one bond for all these things, and if anyone attempts philosophy in any other way he must call on Fortune to assist him. For there is never a path without these… The one who has attained all these things in the way I describe, him I for my part call wisest, and this I maintain through thick and thin." For it is clear that these studies are like ladders and bridges that carry our minds from things apprehended by sense and opinion to those comprehended by the mind and understanding, and from those material, physical things, our foster-brethren known to us from childhood, to the things with which we are unacquainted, foreign to our senses, but in their immateriality and eternity more akin to our souls, and above all to the reason which is in our souls.”

Nicomachus (60–120) Ancient Greek mathematician

Footnote: The Epinomis, from which Nicomachus here quotes 991 D ff., is now recognized as not genuinely Platonic. Nicomachus doubtless cited the passage from memory, for he does not give it exactly...
Nicomachus of Gerasa: Introduction to Arithmetic (1926)

Books, Law, Way, Soul

“Ever wish you could draw a few diagrams, press a button, and have a working software system that meets your needs? Sound like magic? Perhaps, but that’s a major part of the Executable UML vision. The basic idea is that you will use a CASE tool to develop detailed UML diagrams and then supplement them by specifications written in a formal language, presumably the OMG’s Object Constraint Language (OCL). The basic idea behind Executable UML is that systems can be modeled at a higher level of abstraction than source code, simulated to support validation of your efforts, and then translated into efficient code. This higher-level of abstraction should help to avoid premature design, enable you to change your system as your requirements evolve, and to delay implementation decisions until the last minute.”

Scott W. Ambler (1966) Canadian software engineer/consultant/author

Source: Agile Modeling: Effective Practices for eXtreme Programming and the Unified Process (2002), p. 172

Idea, Support, Decision, Effort

“Concept maps have long provided visual languages widely used in many different disciplines and application domains. Abstractly, they are sorted graphs visually represented as nodes having a type, name and content, some of which are linked by arcs. Concretely, they are structured diagrams having discipline- and domain-specific interpretations for their user communities, and, sometimes, formally defining computer data structures. Concept maps have been used for a wide range of purposes and it would be useful to make such usage available over the World Wide Web.”

Brian R. Gaines (1938) British computer scientist

Gaines (2001) " WebMap: Concept Mapping on the Web http://www.w3.org/Conferences/WWW4/Papers/134/" on w3.org/Conferences/WWW4, 2001.

World, Communication

“The Venn Diagram of guys who don't like smart girls and guys you don't want to date is a circle.”

John Green (1977) American author and vlogger

Love and Romance Questions Answered http://www.youtube.com/watch?v=3y49IXavVDE <br class="br">YouTube

Guy, Girl

“An information retrieval system is therefore defined here as any device which aids access to documents specified by subject, and the operations associated with it. The documents can be books, journals, reports, atlases, or other records of thought, or any parts of such records—articles, chapters, sections, tables, diagrams, or even particular words. The retrieval devices can range from a bare list of contents to a large digital computer and its accessories. The operations can range from simple visual scanning to the most detailed programming.”

Brian Campbell Vickery (1918–2009) British information theorist

Source: The Structure of Information Retrieval Systems (1959), p. 1275.

Books, Parting

“Forensic procedure is an art form, nothing less. No, I'll go further: it's higher, more refined, than any art form. Why? Because it's real. Take just one aspect of it—say the diagrams: with all their outlines, arrows and shaded blocks they look like abstract paintings, avant-garde ones from the last century—dances of shapes and flows as delicate and skilful as the markings on butterflies' wings. But they're not abstract at all. They're records of atrocities. Each line, each figure, every angle—the ink itself vibrates with an almost intolerable violence, darkly screaming from the silence of white paper: something has happened here, someone has died.”

Tom McCarthy (writer) book Déjà vu

Source: Remainder (2005), Ch. 11.

Art, Silence, Dance, Painting

“We have a design [special characteristics of the detector] which is entirely based on a single magnet, a high field solenoid. The first thing one actually does in the design of the experiment is actually to figure out the magnetic field configuration for the measurement of muons. That then determines the rest of the design. The detector is built such that [see diagram] the first layer is within a tracker, which is all silicon.”

Tejinder Virdee (1952) British physicist

"Discovery machine; Interview with Dr. Jim Virdee," 2010

“When the correspondences on the plane can be established between:
- all the divisions of one component
- and all the divisions of another component, the construction is a DIAGRAM.”

Jacques Bertin (1918–2010) French geographer and cartographer

Source: Semiology of graphics (1967/83), p. 50

“What is seen and called the picture is what remains – an evidence. Even as one travels in painting towards a state of 'unfreedom' where only certain things can happen, unaccountably the unknown and free must appear. Usually I am on a work for a long stretch, until a moment arrives when the air of the arbitrary vanished and the paint falls into positions that feel destined. The very matter of painting – its pigment and space – is so resistant to the will, so disinclined to assert its plane and remain still. Painting seems like impossibility, with only a sign now and then of its own light. Which must be because of the narrow passage from a diagramming to that other state – corporeality. In this sense, to paint is a possessing rather than a picturing.”

Phillip Guston (1913–1980) American artist

12 Americans, by Dorothy C.Miller, New York, 1956. p. 36
1950 - 1960

Travel, Feeling, Sense, Light

“A graphic is a diagram when correspondences on the plane can be established among all elements of another component.”

Jacques Bertin (1918–2010) French geographer and cartographer

Source: Semiology of graphics (1967/83), p. 193

“Data is transformed into graphics to understand. A map, a diagram are documents to be interrogated. But understanding means integrating all of the data. In order to do this it’s necessary to reduce it to a small number of elementary data. This is the objective of the “data treatment” be it graphic or mathematic.”

Jacques Bertin (1918–2010) French geographer and cartographer

About the true value of graphics
Interview with Jacques Bertin (2003)

Mathematics, Understanding

“Summing up, Nanoscale Communication Networks is a demanding but also very interesting book, an ambitious primer. It is definitely a good starting point for further reading. The author guides the reader through all the aspects of nanonetworks, giving in most cases a clear description of his thinking process within transitions between equations. There are also many cross references between chapters and sections which give a broader view of the topic and help to memorize it. One can also find many pictures, diagrams and tables throughout this book in order to systematize the presented knowledge.”

Stephen F Bush

Book Reviews, REVIEWER: JAKUB PALIDER, NANOSCALE COMMUNICATION NETWORKS STEPHEN F. BUSH, ARTECH HOUSE, 2010, ISBN-13: 978-1-60807-003-9, HARDCOVER, 308 PAGES, IEEE Communications Magazine, August 2011.

Books, Communication, Knowledge, Thinking

“How could one argue with a man who was always drawing lines and circles to explain the position; who, one day, drew a diagram [here Michael illustrated with pen and paper] saying 'take a point A, draw a straight line to point B, now three-fourths of the way up the line take a point C. The straight line AB is the road to the Republic; C is where we have got to along the road, we canot move any further along the straight road to our goal B; take a point out there, D [off the line AB]. Now if we bend the line a bit from C to D then we can bend it a little further, to another point E and if we can bend it to CE that will get us around Cathal Brugha which is what we want!”

Michael Collins (Irish leader) (1890–1922) Irish revolutionary leader

How could you talk to a man like that?
Referring to Eamon de Valera in conversation with Michael Hayes, at the debates over the Anglo-Irish Treaty in 1921
Michael Hayes Papers, P53/299, UCDA
Quoted in Doherty, Gabriel and Keogh, Dermot (2006). Michael Collins and the Making of the Irish State. Mercier Press, p. 153.

Way, Drawing

“This is why we call people exes, I guess -- because the paths that cross in the middle end up separating at the end. It's too easy to see an X as a cross-out. It's not, because there's no way to cross out something like that. The X is a diagram of two paths.”

John Green book Will Grayson, Will Grayson

Will Grayson, p. 277
Will Grayson, Will Grayson (2010)

People, Way

“A later writer, such as Leijonhufvud, I knew to have it wrong, when he later argued the merits of Keynes’s subtle intuitions and downplayed the various (identical!) mathematical versions of The General Theory. The so-called 1937 Hicks or later Hicks–Hansen IS–LM diagram will do as an example for the debate.”

Paul A. Samuelson (1915–2009) American economist

New millennium, An Interview with Paul A. Samuelson, 2003

Mathematics

“To analyse graphic representation precisely, it is helpful to distinguish it from musical, verbal and mathematical notations, all of which are perceived in a linear or temporal sequence. The graphic image also differs from figurative representation essentially polysemic, and from the animated image, governed by the laws of cinematographic time. Within the boundaries of graphics fall the fields of networks, diagrams and maps. The domain of graphic imagery ranges from the depiction of atomic structures to the representation of galaxies and extends into the spheres of topography and cartography.”

Jacques Bertin (1918–2010) French geographer and cartographer

Source: Semiology of graphics (1967/83), p. 2

Law, Music, Mathematics, Time

“.. how the movement of the passers-by [in his Street scene painting of 191-14] is comprehended in the rhombus of the heads which is twice repeated. In this way life and movement arise from an original geometric form. [Kirchner designed a diagram together with this line in the letter]”

Ernst Ludwig Kirchner (1880–1938) German painter, sculptor, engraver and printmaker

Letter to Karl Hagemann, 27 February 1937; as quoted in Kirchner and the Berlin street, ed. Deborah Wye, Moma, New York, 2008, p. 81 - note 31
1930's

Life, Way, Painting

“Innovative e-business projects start with a design of the e-business model. We often encounter the view, in research as well as industry practice, that an e-business model is similar to a business process model, and so can be specified using UML activity diagrams or Petri nets. In this paper, we explain why this is a misunderstanding. The root cause is that a business model is not about process but about value exchanged between actors. Failure to make this separation of concerns leads to poor business decision-making and inadequate business requirements.”

Hans van Vliet (1949) Dutch computer scientist

Jaap Gordijn, Hans Akkermans, and Hans Van Vliet. "Business modelling is not process modelling." International Conference on Conceptual Modeling. Springer Berlin Heidelberg, 2000. Abstract

Failure, Business, Decision

“The very spirits of the winds, when they were sent to carry the grateful harvest to the thirsting fields of Calabria, did not forget the geometry which they had studied in the caverns of Æolus and of which the geologist is daily discovering the diagrams.”

Benjamin Peirce (1809–1880) American mathematician

Ben Yamen's Song of Geometry (1853)

Study, Forgetting

“Extreme Programming is the most prominent new, light-weight (or agile) methods, defined to contrast the current heavy-weight and partially overloaded object-oriented methods. It focuses on the core issues of software technology. One of its principles is not to rely on diagrams to document a system.”

Bernhard Rumpe (1967) German computer scientist

Source: Executable Modeling with UML. A vision or a Nightmare (2002), p. 697

Light

“The male sense of space must differ from that of the female, who has such interesting, active, and significant inner space. The space that interests men is outer. The fly ball high against the sky, the long pass spiraling overhead, the jet fighter like a scarcely visible pinpoint nozzle laying down its vapor trail at 40,000 feet, the gazelle haunch flickering just beyond arrow-reach, the uncountable stars sprinkled on their great black wheel, the horizon, the mountaintop, the quasar — these bring portents with them and awaken a sense of relation with the invisible, with the empty. The ideal male body is taut with lines of potential force, a diagram extending outward; the ideal female body curves around centers of repose.”

John Updike (1932–2009) American novelist, poet, short story writer, art critic, and literary critic

“The Disposable Rocket,” Michigan Quarterly Review (Fall 1993)

Men, Star, Sense, Flying

“It is Vesalius' Anatomy of Birth -- a book of drawings and diagrams of human anatomy. Beautiful drawings but -- as the pages turn -- terrible in their frankness…”

Peter Greenaway (1942) British film director

Prospero's Books

Books, Beauty, Birth, Drawing

“I've had enough of breakdowns and diagrams—
Judging from picture books, apparently
Heaven is a partly cloudy place.”

Jenny Lewis (1976) American actor, singer-songwriter

"Don't Deconstruct"
Song lyrics, Take Offs and Landings (2001)

Books

“To change the subject, he said, “I’ve been thinking a lot.”
“What about?”
“Free will.”
“Free will?”
“Yeah,” he said, trying not to fidget, a weird feeling in his head. “I reckon free will is bullshit.”
“You need to get some sleep, Spider.”
“No, no, I feel okay, more or less.”
“Free will,” she said, shaking her head.
“It’s an illusion. That’s all it is. Everything is already sorted out, every decision, every possibility, it’s all determined, scripted, whatever.”
Iris was looking at him as if she was worried. “Where’d all this come from?”
“I’ve been to the End of bloody Time, Iris. From that perspective, everything is done and settled. Basically, everything that could happen has happened. It’s all mapped out, documented, diagrammed, written up in great big books, and ignored.”
“You’re a crazy bastard, you know that, Spider?”
“Maybe not crazy enough,” he said.
Iris was still struggling for traction on the conversation. “You think everything is predetermined? Is that it? But what about—”
“No. You just think you have free will.”
“So, according to you,” Iris said, looking bewildered, “a guy who kills his wife was always going to kill her. She was always going to die.”
“From his point of view, he doesn’t know that, and neither does she, but yeah. She was always a goner, so to speak.”
“There is no way I can accept this,” she said. “It’s intolerable. It robs individual people of moral agency. According to you nobody chooses to do anything; they’re just following a script. That means nobody’s responsible for anything.”
“I said free will is an illusion. We think we’ve got moral agency, we think we make choices. It’s a perfect illusion. It just depends on your point of view.”
“It’s a bloody pathway to madness, I reckon,” Iris said.
“I dunno,” he said. “Right now, sitting here, thinking about everything, I think it makes a lot of sense. Kinda, anyway.””

K. A. Bedford book Time Machines Repaired While-U-Wait

“Think you’ll find that’s just an illusion,” she said, and flashed a tiny smile.
Source: Time Machines Repaired While-U-Wait (2008), Chapter 22 (pp. 271-272)

People, Books, Smile, Way

“Our cause is just, and it continues. Our discoveries in Afghanistan confirmed our worst fears, and showed us the true scope of the task ahead. We have seen the depth of our enemies' hatred in videos, where they laugh about the loss of innocent life. And the depth of their hatred is equaled by the madness of the destruction they design. We have found diagrams of American nuclear power plants and public water facilities, detailed instructions for making chemical weapons, surveillance maps of American cities, and thorough descriptions of landmarks in America and throughout the world.”

George W. Bush (1946) 43rd President of the United States

2000s, 2002, State of the Union address (January 2002)

Life, World, Fear, Water

“Lick the alphabet. It makes you appear creative, it's an easy diagram to remember, it's like "aaaaa…. beeeee…. ceeee." She's thinking you're from fuckin' Europe or somethin: "OH GOD, WHERE'D YOU LEARN THAT, OHHH," and you're going "A, B, C, D, E, F, G".”

Sam Kinison (1953–1992) American comedian

HBO Special (1985)

God, Thinking, Learning, Appearance

“In view of the dramatic effects that alternative representations may produce on search and recognition processes, it may seem surprising that the differential effects on inference appear less strong. Inference is largely independent of representation if the information content of the two sets of inference rules [one operating on diagrams and the other operating on verbal statements] is equivalent—i. e. the two sets are isomorphs as they are in our examples”

Herbert A. Simon (1916–2001) American political scientist, economist, sociologist, and psychologist

Source: 1980s and later, "Why a diagram is (sometimes) worth ten thousand words," (1987), p. 71, as cited in: Bauer, Malcolm I., and Philip N. Johnson-Laird. " How diagrams can improve reasoning http://mentalmodels.princeton.edu/papers/1993diags%26reasoning.pdf." Psychological Science 4.6 (1993): 372-378.

Search, Strong, Appearance

“A model is a qualitative or quantitative representation of a process or endeavor that shows the effects of those factors which are significant for the purposes being considered. A model may be pictorial, descriptive, qualitative, or generally approximate in nature; or it may be mathematical and quantitative in nature and reasonably precise. It is important that effective means for modeling be understood such as analog, stochastic, procedural, scheduling, flow chart, schematic, and block diagrams.”

Harold Chestnut (1917–2001) American engineer

Source: Systems Engineering Tools, (1965), p. 108; As cited in: Alberto Ortiz (1992) Systems engineering concept demonstration, process model http://www.dtic.mil/dtic/tr/fulltext/u2/a265469.pdf. p. 12

Mathematics, Nature

“With all this science and physics and so forth that I absorbed. I did have one early experience with engineering, however. When we got the Book of Knowledge, I found on one page a diagram for a short-wave radio. I thought it would be neat to try to make a shortwave radio, so I arranged with all the radio repairmen in the town that whenever they were going to junk a radio, they should set it aside and I would pick it up. I got all these old radios -- really classics now -- that I stripped. I had huge transformers and loudspeakers and huge condensers -- the whole works. Boxes full of this stuff. I didn't understand it. I didn't know a thing about it. I just liked to take things apart and learn how to solder. I discovered out of my collection of parts -- with the tuning condensers (with movable plates), the knobs, and all that stuff, that I had what seemed to be needed in this one page diagram of a shortwave receiver.”

Douglas T. Ross (1929–2007) American computer scientist

Source: An Interview with Douglas T. Ross (1984), p. 11-12.

Books, Understanding, Knowledge, Learning

“The diagram on the opposite page, similar in plan and purpose to one devised by Mr. M. C. Rorty, represents, in a general way, the circuit flow of money. To find fault with this diagram from an engineering standpoint would not be difficult; neither would it be sensible. All we should ask of these reservoirs and pipes is that they serve the purpose at hand. In the main, subject to certain qualifica qualifications to be made presently, this diagram does serve our purpose. It pictures the flow of money when business is relatively stable.”

William Trufant Foster (1879–1950) American economist

Source: The circuit flow of money, 1922, p. 262

Money, Way, Business

“The circular-flow diagram offers a simple way of organizing the economic transactions that occur between households and firms in the economy. The two loops of the circular-flow diagram are distinct but related. The inner loop represents the flows of inputs and outputs. The households sell the use of their labor, land, and capital to the firms in the markets for the factors of production. The firms then use these factors to produce goods and services, which in turn are sold to households in the markets for goods…”

N. Gregory Mankiw (1958) American economist

N. Gregory Mankiw, Brief Principles of Macroeconomics. 2011, p. 24-25
2000s -

Way

“Steve Mellor and I independently came up with a characterization of the three modes in which people use the UML: sketch, blueprint, and programming language. By far the most common of the three, at least to my biased eye, is UML as sketch. In this usage, developers use the UML to help communicate some aspects of a system. As with blueprints, you can use sketches in a forward-engineering or reverse-engineering direction. Forward engineering draws a UML diagram before you write code, while reverse engineering builds a UML diagram from existing code in order to help understand it.”

Martin Fowler (1963) British programmer

Source: A Brief Guide to the Standard Object Modeling Language, 2004, p. 2

People, Communication, Understanding, Help

“Graphical design notations have been with us for a while… their primary value is in communication and understanding. A good diagram can often help communicate ideas about a design, particularly when you want to avoid a lot of details. Diagrams can also help you understand either a software system or a business process. As part of a team trying to figure out something, diagrams both help understanding and communicate that understanding throughout a team. Although they aren't, at least yet, a replacement for textual programming languages, they are a helpful assistant… Of these graphical notations, the UML's importance comes from its wide use and standardization within the OO development community. The UML has become not only the dominant graphical notation within the OO world but also a popular technique in non-OO circles.”

Martin Fowler (1963) British programmer

Source: UML Distilled: A Brief Guide to the Standard Object Modeling, 2004, p. xxvi

World, Communication, Idea, Understanding

“In the first solution of Isoperimetrical problems, the Bernoullis use diagrams and their properties. Euler, in his early essays, does the same; then, as he improves the calculus he gets rid of constructions. In his Treatise”

Robert Woodhouse (1773–1827) English mathematician

A Treatise on Isoperimetrical Problems, and the Calculus of Variations (1810)
Context: There is another point... and that is the method of demonstration by geometrical figures. In the first solution of Isoperimetrical problems, the Bernoullis use diagrams and their properties. Euler, in his early essays, does the same; then, as he improves the calculus he gets rid of constructions. In his Treatise [footnote: Methodus inveniendi, &c. ], he introduces geometrical figures, but almost entirely, for the purpose of illustration: and finally, in the tenth volume of the Novi Comm. Petrop. as Lagrange had done in the Miscellanea Taurinensea, he expounds the calculus, in its most refined state, entirely without the aid of diagrams and their properties. A similar history will belong to every other method of calculation, that has been advanced to any degree of perfection. <!--Preface p. vii-viii

Problem

“But in writing this book I found myself sadly hampered by the impossibility of drawing such diagrams as were necessary for my purpose… my life was under a cloud. All pleasures palled upon me; all sights tantalized and tempted me to outspoken treason, because I could not but compare what I saw in Two Dimensions with what it really was if seen in Three, and could hardly refrain from making my comparisons aloud.”

Edwin Abbott Abbott book Flatland

Source: Flatland: A Romance of Many Dimensions (1884), PART II: OTHER WORLDS, Chapter 22. How I Then Tried to Diffuse the Theory of Three Dimensions by Other Means, and of the Result
Context: I devoted several months in privacy to the composition of a treatise on the mysteries of Three Dimensions. Only, with the view of evading the Law, if possible, I spoke not of a physical Dimension, but of a Thoughtland whence, in theory, a Figure could look down upon Flatland and see simultaneously the insides of all things, and where it was possible that there might be supposed to exist a Figure environed, as it were, with six Squares, and containing eight terminal Points. But in writing this book I found myself sadly hampered by the impossibility of drawing such diagrams as were necessary for my purpose... my life was under a cloud. All pleasures palled upon me; all sights tantalized and tempted me to outspoken treason, because I could not but compare what I saw in Two Dimensions with what it really was if seen in Three, and could hardly refrain from making my comparisons aloud.' I neglected my clients and my own business to give myself to the contemplation of the mysteries which I had once beheld, yet which I could impart to no one, and found daily more difficult to reproduce even before my own mental vision.

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