How to do a methodology Research paper

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How to Write a Paper Mike Ashby Engineering Department, University of Cambridge, Cambridge rd 6 Edition, April 2005 Mike Ashby How to Write a Paper 6th Edition, February 2005 Introduction This brief manual gives guidance in writing a paper about your research. Most of the advice applies equally to your thesis or to writing a research proposal. The content of the paper reflects the kind of work you have done: experimental, theoretical, computational. I have used, as a model, a typical Materials project: one combining experiment with modeling and computation to explain some aspect of material behaviour. Sections 1 to 8 give guidelines for clear writing with brief examples. The Appendix contains longer examples of effective and ineffective writing. The manual is prescriptive—it has to be, if it is to be short. It is designed to help those struggling with their first paper, or those who have written several but find it difficult. Certain sections may seem to you to be elementary; they are there because, to others, they are not. Section 8, on Style, is open- ended, the starting point for more exciting things. How to write a paper, 6th edition 1 MFA, 20/02/05 1 THE DESIGN Well-written papers are read, remembered, cited. Poorly written papers are not. To write well, you need a design. Like any design activity, there are a number of steps (Figure 1). I’ve used the language of engineering design here—it fits well. The Market Need. What is the purpose of the document? Who will read it? How will the reader use it? The answers help you decide the length, the level of detail, the style. The Concept. Good writing starts with a plan. Writers have different ways of developing plans. I find the concept-sheet (Section 3, below) is a good way to do it. Figure 1. The Design Process. Designing a paper is like designing anything else: there are five essential steps. The Embodiment. The embodiment is the first draft. Get the facts down on paper without worrying about style; make drafts of each section; develop the calculations; sketch the figures; assemble How to write a paper, 6th edition 3 MFA, 20/02/05 references. Detail. Now comes the crafting: clarity, balance, readability; in a word —style. The End-Product. Appearance is important: good layout, clear headings, well-designed figures. The Sections that follow expand on each of these in turn. 2 THE MARKET—Who are your readers? Your market is your readers. Put yourself in their shoes: what, if you were they, would you wish to find? The readers of your thesis are your examiners. They expect details of all relevant parts of your research: why you did it, its background, your thinking, what you did, your conclusions and your views on where it is going. They don’t want the irrelevant parts—details of how standard equipment works, for instance. Find out as much as you can about content and format from your supervisor and other students, and look at some recent (successful) theses to get a feel for the product this market expects. A paper is read by one or more skilled referees, and, if accepted, by a scientifically-informed audience. This manual focuses on writing papers. The pages that follow explain how this market should be addressed. A research proposal usually addresses two markets. One is the funding agency: the EPSRC, the EU, another Government Agencies, or a Charity. They will look for a match between their priorities and yours. The other is the referees that the funding agency will use; they are charged with judging quality, promise How to write a paper, 6th edition 4 MFA, 20/02/05 and relevance. Hardest to write is a popular article, addressing an audience who is intelligent—one should always assume that—but who may know nothing of your subject. Here style, always important, must be fine-tuned to meet their needs. More on style in Section 8. Make no mistake. Write poorly and you’ll bore, exasperate and ultimately lose your readers. Write well, and they’ll respond in the way you plan. Figure 2. Markets for technical writing. 3 CONCEPT—Making a Concept-Sheet When you can’t write, it is because you don’t know what you want to say. The first job is to structure your thinking. Settle down comfortably with a cup of coffee (or better, beer) and an A3 sheet How to write a paper, 6th edition 5 MFA, 20/02/05 of paper in Landscape orientation as in Figure 3. Devise a tentative title for the paper and write it at the top. Then—in as orderly way as you can, but disorder is OK too—jot down what seem like sensible section headings, each in its own box. Sketch in anything that occurs to you that belongs in a section— paragraph headings, figures, ideas. Think of things that might be relevant to the section—a reference, a graph you might need, an idea that requires further development. Put each in a bubble near the box to which it applies, with an arrow showing where it fits in. This is the time to de-focus, forget the detail and think both longitudinally and laterally. A3 or A4 sheet, Good ideas landscape mode for the text Boxes with main headings Links between Things that are sections of text still needed Figure 3. A model for a concept sheet. How to write a paper, 6th edition 6 MFA, 20/02/05 What should be in the paper? What else might be relevant? What else might you need to do the job—a copy of X, a figure of Y, the reference Z? Put it all down. You realise that you need an extra section—squeeze it in. You see that the order of sections is not good—add arrows indicating the new order. All this sounds like a child’s game, but it is not. Its value lies in the freedom of thought it permits. Your first real act of composition (this one) is to allow your thinking to range over the entire paper, exploring ways in which the pieces might fit together, recording the resources you will need and capturing ideas. That way, no matter which part you start drafting, you have an idea of the whole. Don’t yet think of style, neatness or anything else. Just add, at the appropriate place on the sheet, your thoughts. This can be the most satisfying step of writing a paper. Later steps can take time, be hard work, sometimes like squeezing water out of stone. But not this—it is the moment to be creative in whatever way your ideas may lead. You can add to the sheet at any time It becomes a road-map of where you are going. Figure 4 shows, unexpurgated, the concept sheet I made while thinking about this manual. Some bits were already planned; most developed in the hour I spent making the sheet; a few were added later, after some sections had been drafted. It is a mess, notes to oneself, but it guides the subsequent, more tedious, part of the journey. It is possible that this starting point may not work for you, but try it more than once before you abandon it. It is the best way I know to break writers-block and launch the real writing of the paper. How to write a paper, 6th edition 7 MFA, 20/02/05 Figure 4. The concept sheet I made when writing this text. How to write a paper, 6th edition 8 MFA, 20/02/05 4 EMBODIMENT—The First Draft Now the hard work. Break the job down into stages. The usual stages in writing a paper are set out in the boxes below. Papers are not drafted sequentially; do it in any order you wish. Get the scientific facts and technical details down, the ideas formulated, the graphs and figures planned. If good ways of expressing the ideas occur to you now, use them; but do not deflect effort from the key job of assembling the pieces, in whatever form them come. Here they are. 4.1 TITLE • Meaningful and brief, in 14 pt bold. Fatigue of Metal Foams is better than The Mechanical Response of Cymat and Alporas Metallic Foams to Uni-axial Cyclic Loading even though it is less specific. 4.2 ATTRIBUTION • The names of the authors, with all initials; the Institute or organisation, with full address; the date. “A.M.Harte and C.Chen, The Cambridge Centre for Micromechanics, Cambridge University Engineering Department, Cambridge CB2 1PZ, UK January 1999.” How to write a paper, 6th edition 9 MFA, 20/02/05 4.3 THE ABSTRACT • Try for one sentence each on motive, method, key results, conclusions. • Don’t exceed 3 sentences on any one. The reader of an Abstract has been lured by the title. He or she now want to know whether to read on. Tell them, in as few sentences as possible, what they will find. No waffle, no spurious details. Try not to exceed 100 words. Imagine that you are paying a 10p a word. See the Appendix for an example. 4.4 INTRODUCTION • What is the problem and why is it interesting? • Who are the main contributors? • What did they do? • What novel thing will you reveal? Outline the problem and why it was worth tackling. Review the literature, recording briefly the main contributors and summarising the status of the field when you started the research. Provide any specialised information that the reader might need if he is to understand what follows. State what you will do that has not been done before (new experimental approach? new data? new model? new interpretation?) Keep it as brief as you can whilst still doing all this. Start with a good first sentence—see Section 8 for examples. How to write a paper, 6th edition 10 MFA, 20/02/05 4.5 METHOD • Experimental paper: equipment, materials, method Modelling paper: assumptions, mathematical tools, method Computational paper: inputs, computational tools, method • Explain what is especially different about your method. • Give sufficient detail that the reader can reproduce what you did. • Don’t mix Method with Results or Discussion—they come next. This should be an easy section to write: just say what you did, succinctly. Use “we” but do so sparingly: too many “we’s” sounds like a child’s day out: “first we did this, then we did that.” Build up a reference list as you go. See Section 4.10 for the way to deal with references. It is one of the principles of science that a paper should contain sufficient detail to allow the work to be repeated by someone else. Provide this but no more. Keep the results for the next section. 4.6 RESULTS • Present the output of the experiments, model or computation. • Don’t mix Results with Discussion. It belongs—all of it—in 4.7. How to write a paper, 6th edition 11 MFA, 20/02/05 This, too, should be an easy section to write. Report your results simply, without opinion or interpretation at this stage. Define all symbols and units. Present data in a form other people can use. Give emphasis in the text the most important aspects of the tables, graphs or figures. Give error-bars or confidence-limits for numerical or graphical data. Statistics should be meaningful; avoid confidence-eroding statements such as “33.3% of the samples failed: 33.3% survived; the third sample was unfortunately misplaced.” Aim for a concise, economical style. Poor: It is clearly shown in Figure 3 that the shear loading had caused the cell-walls to suffer ductile fracture or possibly brittle failure. Better: Shear loading fractures cell-walls (Figure 3). 4.7 DISCUSSION • Extract principles, relationships, generalisations. • Present analysis, model or theory. • Show relationship between the results and analysis, model or theory. Here you are seeking to extract principles, relationships, or generalisations from the results. Sometimes the results speak for themselves. The novel heat-treatment described in Section 2 gives steels which How to write a paper, 6th edition 12 MFA, 20/02/05 are 10% stronger and 20% tougher than those heat-treated in the normal way. could be all you need. Most of the research we do aims at why materials behave as they do, and this requires ideas about mechanisms, models and associated theory. The function of the Discussion is to describe the ideas, models and theories and lead the reader through a comparison of these with the experimental or computational data. Bring out the most significant conclusions first; develop subsidiary conclusions after that. Be clear and concise; a Discussion is not a license to waffle. See Appendix for examples of waffle and what to do about it. 4.8 CONCLUSION • Draw together the most important results and their consequences. • List any reservations or limitations. The reader scanning your paper will read the Abstract and the Conclusions, glance at the Figures and move on. Do not duplicate the Abstract as the Conclusions or vice versa. The Abstract is an overview of the entire paper. The Conclusions are a summing up of the advances in knowledge that have emerged from it. It is acceptable to present conclusions as a bullet-pointed list. 4.9 ACKNOWLEDGEMENTS • Thank people who have helped you with ideas, technical assistance, materials or finance. How to write a paper, 6th edition 13 MFA, 20/02/05 Keep it simple, give full names and affiliation, and don’t get sentimental. A formula such as this works well: I wish to thank Prof. L.M. Brown of the Cavendish Laboratory, Cambridge, for suggesting this review, and to acknowledge my debt to the books listed below. or: The authors wish to thank Professor A. G. Evans of Harvard University for suggesting the approach developed in section 4.3; Mr A. Heaver for his technical assistence throughout the project and Mrs Jo Ladbrooke for proof-reading the manuscript. The research was supported by the EPSRC under grant number EJA S67, by the DARPA-ONR MURI program under contract number N00014-1-96- 1028, and by a Research Fellowship from the National Research Council of Canada. 4.10 REFERENCES • Cite significant previous work. • Cite sources of theories, data, or anything else you have taken from elsewhere. • References must be complete: name, initials, year, title, journal, volume, start-page and finish-page. References tell the reader where an idea, prior results and data have come from. It is important that you reference all such How to write a paper, 6th edition 14 MFA, 20/02/05 sources. It is a conventional courtesy to reference the originators of key ideas or theories or models, even if you modify them. There are almost as many different formats for references as there are journals. If you have ENDNOTE on your PC it can solve the problem. Best for drafts is the Name/year system (also called the Harvard system): In text : “Lu (1998)”. If there are two names then “Lu & Chen (1998)”. If there are more than two, then “Lu et al (1998)”. In reference list, ordered alphabetically: “Lu, T.J and Chen, C. (1998) An Analysis of Defects in Metal Foams, Acta Mater. 15, 222-226”. For papers: Name, initials, year, title, journal, volume, start page- end page. For books: Name, initials, year, title, publisher, city and country of publisher, chapter number, start page-end page (if relevant). All are important. Do not be tempted to make a reference list without all of these. It takes far longer to track down the missing information later than to do it right in the first place. 4.11 FIGURES • Flow charts show methods, procedures. • Graphs plot data. • Schematics show how equipment works, or illustrate a mechanism or model. • Drawings and photographs illustrate equipment, microstructures etc. How to write a paper, 6th edition 15 MFA, 20/02/05 Anyone scanning your paper will look at the figures and their captions, even if they do not read the text. Make each figure as self-contained as possible, and give it both a title (on the figure itself) and an informative caption (below it). Make sure that the axes are properly labelled, that units are defined and that the figure will tolerate reduction is size without becoming illegible. Label each curve of graphs. Good figures are reproduced or imitated by others, often without asking—the sincerest of compliments. 4.12 APPENDICES • Essential material that would interrupt the flow of the main text. An appendix must have purpose; it is not a bottom drawer for the stuff that you cannot bear to throw away. It is the place for tedious but essential derivations, or for data tables or descriptions of procedures, that would disrupt the flow of ideas in the main text. It should be well structured and stand by itself. Give it a title: “Appendix A1: The Equation for Toughness” The journal may set it in smaller type than the main text. … … … … When you get this far you have got a long way. Put the draft on one side for at least 48 hours. Get the graphs plotted, the figures drawn up, micrographs printed and references assembled. Do not tinker with the text yet. It is a good idea to have a check-list like the one on the last page of this manual; it helps you see where you are. How to write a paper, 6th edition 16 MFA, 20/02/05 …………Time has passed. The draft has matured for 48 hours or more. Now we must address the details. 5 DETAIL I: Grammar Grammar tells the reader the function of words and their relationship. Mess up the grammar and you confuse the reader. What follows is a brief summary of the simplest essentials of grammar. 5.1 The parts of speech Parts of speech are descriptors for the functions of words. There are eight. • Nouns are the names of peoples or thing: Instron, metal, computer, foam. Nouns can be used as adjectives. When so used, they are generally hyphenated to the noun they qualify: table-tennis, metal- foam, computer-power. • Pronouns stand for nouns: he, she, it, they. • Adjectives qualify nouns: a small Instron, a red metal, a digital computer, an intricate foam. • Verbs signify being or action: is, seems, go, interpret, understand. How to write a paper, 6th edition 17 MFA, 20/02/05 Transitive verbs have a subject and an object: The load / deforms / the material. Intransitive verbs have no object: Flowers / bloom. The research / evolved. “Being” verbs have a complement: The test / was / completed. The theory / seemed / correct. (“Completed” and “correct” are complements) Many verbs have both a transitive and an intransitive form: Time / passed. And: Pass the biscuits. • Adverbs qualify verbs: today we interpret this differently. • Conjunctions link words and sentences: and, but, because... • Prepositions precede nouns, usually having to do with place or time: on the table, after this procedure, on the graph, from the appendix. • Interjections are exclamations; the polite ones include: Alas Great Cheers Many are impolite. They are inappropriate in technical writing. 5.2 Sentence structure A simple sentence has a subject and a predicate. Subject Predicate The sample failed. The measurements fell into two classes. Fatigue-loading causes microstructural damage. How to write a paper, 6th edition 18 MFA, 20/02/05 The subject identifies what or whom the sentence is about. The predicate, containing a verb, says something about the subject. 5.3 Phrases and clauses Phrases and clauses are groups of words that do the jobs of the parts of speech listed on Section 5.1. A phrase is a group of words that does not contain a verb. Type of phrase Example Noun phrase The interpretation of the experiment presents a problem. Adjective phrase The red and white striped cable is live. Adverbial phrase We examined the results with considerable care. Conjunctive phrase The test ended owing to the fact that the specimen failed. Avoid the last of these; there is always a simpler, one-word conjunction (here: “because”). A clause contains a verb and its subject or object. Sentences are made by linking clauses. A sentence made with two equal clauses (each a separate sentence but linked together) is called a compound sentence. A sentence made with a main clause linked to one or more subordinate clauses, which cannot stand by themselves as separate sentences, is called a complex sentence. Adjective clauses do the work of adjectives; adverb clauses do the work of adverbs. How to write a paper, 6th edition 19 MFA, 20/02/05 Type of Clause Example Adjective clause A computation that uses FE methods is appropriate. Adverb clause The modem will operate wherever a phone-line is available. 5.4 Compound sentences A compound sentence has two co-ordinate (“equal”) clauses linked by a conjunction: We measured the temperature and (we) adjusted the thermostat. The tooling cost is high but the material cost is low. The parts of a compound sentence must be of comparable weight. “We analysed the microstructures using SEM and left for lunch at midday” is unbalanced. 5.5 Complex sentences A complex sentence has a main clause and a subordinate clause: What these results signify / is the subject of a paper by Wegst (1998). Maine (1998) demonstrates / that technical cost modelling is feasible. It is possible / that the conclusions were mistaken. How to write a paper, 6th edition 20 MFA, 20/02/05