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Move 2: Identify a Gap

After the importance of a research has been identified and the relevant background has been summarized, the Introduction section shifts from a focus on what has been done (or learned) to an emphasis on what remains to be done (or learned). This change in emphasis is signaled with a gap statement. This gap statement points out what is lacking in the field and, in so doing, infers the next step that needs to be taken.

Move 3: Fill the Gap

After the gap has been established, the last move of the Introduction is to fill the gap. The authors must show how the current work takes at least a small step forward toward addressing the specific need, problem, or lack of knowledge in the field. The start of the third move is commonly signaled with a new paragraph and a phrase such as "In this paper," or "In this work, we...". Following this phrase, the authors go on, typically in a sentence or two, to tell the readers about the current work.


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This is followed by a brief narrative that suggests implications and/or applications if the work and addresses at least one of the following questions:

> What are the implications of the work?
> What new insights were gained?
> How has the work increased our fundamental understanding of the research area?
> What are the practical applications of this work?
> How will the work affect the society (e.g., industry, medicine, technology, the environment)?


To answer these questions, authors must look beyond the specific details of their own work and focus instead on the broader goals of the research project. Attaining this broader outlook can be challenging, especially for students who spend most of their time focused on only a small part of a large project. Over time, however, your grasp of the broader picture will improve as you continue to read the literature, attend seminar and conferences, and read and write research proposals in your area of research.

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ÎÒµÄÖ÷Òª¹ÛµãºÍÒÔÉϽ̿ÆÊéµÄ˵·¨¶¼ÊÇÎǺϵģ¬Ã»Óг¬³öÕý¹æµÄ¿ÆÑ§Ð´×÷µÄ·¶Î§£¬´ÓÀ´Ò²Ã»ÓÐÒª±ðÈËÓûªÀöµÄ´ÊÔå¡£ÒÔǰ²©µ¼(Journal of Physical Chemistry×ÊÉî±à¼­¡¢Journal of Molecular Catalysis AÊ®ÄêÇøÓò±à¼­£©¸æËßÎÒ˵Ëû×÷Ϊ±à¼­¶ÁÁ˺ܶàÖйúÈ˵ÄÎÄÕ£¬·¢Ïֺܶ඼ÊÇ¶ÑÆöÊý¾Ý¡£ÒªËµÊý¾Ý¶Ô²»¶Ô£¿Ò²¶Ô¡£µ«ÊÇ˵Ã÷ÁËʲôÎÊÌ⣿£¨So what?£©Äã°ÑµçµÆÅÝÔÒ¿ªÈ¡³öÎÙË¿À´²â·´Ó¦¶¯Á¦Ñ§£¬Êý¾Ý¶Ô²»¶Ô£¬¶ÔµÄ£¬µ«ÊÇÓÐʲôÒâÒ壿

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Tuning Selectivity in Catalysis by Controllong Particle Shape
I. Lee, F. Delbecq, R. Morales, M.A. Albiter, F. Zaera*, Nature Materials 8 (2009) 132-138.
http://www.nature.com/nmat/journal/v8/n2/full/nmat2371.html

ÔÙ¿´¿´ÏÂÃæÁ½ÆªÎÄÕ¡£±ðµÄ²»ÓÃ˵£¬ÊÂʵ¾ÍÊÇÊÂʵ£¬ÖÁÉÙ±ðÈË·¢Á˸ߵµ´ÎÎÄÕ¡£Èç¹û²»ÏàÐÅÕâ¸ö£¬Ö»ÄÜ˵Ã÷¹Âª¹ÑÎÅ¡£ÎÒ´ÓÀ´Ò²Ã»ÓÐ˵ºÃµÄÎÄÕ²»ÐèÒªºÃµÄµã×ÓºÍʵÑ飬´ÓÀ´Ò²Ã»ÓÐ˵¹ý¡£ÎÒÒ²´ÓÀ´Ã»ÓÐ˵¹ýд¿ÆÑÐÂÛÎÄÐèÒªÎÄѧ£¬ÊÂʵÉϲ»ÐèÒªÎÄѧ£¬ÐèÒªµÄÖ»ÊÇ¡°»ù±¾¹¦¡±¡£ÎÊÌâµÄ½¹µãÔÚÓÚ£¬Ê²Ã´ÊÇ¡°»ù±¾¹¦¡±£¬¶Ô»ù±¾¹¦µÄ½ç¶¨£¬Ã¿¸öÈ˶¼²»Ò»Ñù¡£µ«ÊǼÈÈ»Óйú¼Ê½Ì¿ÆÊéºÍºÃÎÄÕ°ÚÔÚÄÄÀÊÂʵ°ÚÔÚÄÄÀ¿É¼û¹úÄÚÍâµÄÈÏÖª¡¢Ñ§ÉúºÍ¹úÍâ½ÌÊÚµÄÈÏÖª»¹ÊÇÓкܴóÇø±ðµÄ¡£

Hydrocarbon Chain Growth on V(100) Single-Crystal Surfaces via Vinyl Intermediates
Min Shen, Francisco Zaera*, Angew. Chem. Int. Ed. 2008, 47, 6583-6585.
http://www3.interscience.wiley.com/journal/120841455/abstract

Synthesis of heterogeneous catalysts with well shaped platinum particles to control reaction selectivity
I. Lee, R. Morales, M.A. Albiter, F. Zaera*, PNAS, October 7, 2008, vol. 105, no. 40, pp. 15241-15246.
http://www.pnas.org/content/105/40/15241.abstract

¡¶How to Write a Successful Science Thesis¡·2006ÄêÓɵ¹úWiley-VCH³ö°æÉ磨µÂ¹úÓ¦Óû¯Ñ§»áÖ¾µÄ³ö°æÉ磩³ö°æ¡£

p. 38. ˵µ½Ò»¶Î»°ÀïÃæ¾ä×ÓºÍÒâ˼µÄÆð³ÐתºÏ¡£"The first sentence in every paragraph warrants special sttention. One of its principal functions is to let the reader know what the ensuing discussion is about, for which reason it is often referred to as the "topic sentence". The corresponsing topic is then pursued in sentences that immediately follow, with the final sentence in the paragraph so crafted that it supplies a bridge to the next paragraph.¡±

p. 91.˵µ½Ð´½á¹û²¿·ÖÒª"tell a story",²»Òª±¨Êý¾Ý¡£"Establish the objective of 'telling a story', with a beginning, a gradual unfolding, and a 'happy end', and encourage each thread to envolve naturally from the one preceding it; make sure, incidentally, that episodes related to sideshows (because they have little to do with the central message) are readily recognized as such--or else omitted altogether."

p. 94.˵µ½Ð´½á¹û²¿·Ö£¬ËµÊ²Ã´»°£¬¶¼ÊÇÒªÓÐÄ¿µÄµÄ£¬²»ÄÜΪÁ˶ÑÊý¾Ý¶ø¶ÑÊý¾Ý¡£"Finally, make your objectives clear to the reader throughout your exposition. Don't be one of those writers who seem intent on spewing forth a relentless torrent of isolated facts. Maintain a consistent focus on your goals."

p. 98.˵µ½²»±Ø¸ù¾ÝÕæÊµµÄʵÑé˳ÐòÀ´ÃèÊöºÍÌÖÂÛÊý¾Ý£¬¶øÊÇÒªÓÐÈ«¾Ö¹Ûµã£¬ÏëÎÒÒª·´Ó³Ê²Ã´¹Ûµã£¬´ïµ½Ê²Ã´Ä¿µÄ£¬¡°Âô¡±Ê²Ã´¶«Î÷£¬È»ºó¡°ÕûÀí¡±³öÒ»¸ö¡°¹ÊÊ¡±À´£¬³öµÄÿһÕÅÅÆ¶¼Î§ÈÆ×ÅÕâ¸ö¹Ûµã¡£"As you organize your thoughts, make a conscious effort to distance yourself from the actual chronology of the research experience. Experimental work is by definition a journey into the unknown, fraught with detours and dead ends, but all such obstacles are basically irrelevant from a scientific standpoint. Look upon your dissertation--as you would any other research report--not as a memoir documenting and explaining your every activity, but instead as a proclamation of a set of new insights. How you achieved your results may perhaps play some role in your mentor's appraisal of your efforts, but otherwise it will be of interest only to the extent that certain intimate details may be critical from a methodological standpoint."

p. 102˵µ½ÔÚÌÖÂÛ²¿·ÖµÄ½áβ¸ÃÈçºÎʹÓû­Áúµã¾¦Ö®±Ê¡£"Near the end of your discussion you may want to be bold and suggest interesting avenues for future exploration: promising approaches to resolving remaining uncertainties, ideas for broadening the scope of a methodology you have developed, or ways of possibly refining your results. If so, be sure the suggestions you make are concrete... Of paramount concern in a Discussion is setting your findings in the proper perspective, which entails emphasizing--just as you presumably will in the abstract as well--the novelty and significance of your accomplishments."

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Tuning Selectivity in Catalysis by Controllong Particle Shape
I. Lee, F. Delbecq, R. Morales, M.A. Albiter, F. Zaera*, Nature Materials 8 (2009) 132-138.
http://www.nature.com/nmat/journal/v8/n2/full/nmat2371.html



Hydrocarbon Chain Growth on V(100) Single-Crystal Surfaces via Vinyl Intermediates
Min Shen, Francisco Zaera*, Angew. Chem. Int. Ed. 2008, 47, 6583-6585.
http://www3.interscience.wiley.com/journal/120841455/abstract

Synthesis of heterogeneous catalysts with well shaped platinum particles to control reaction selectivity
I. Lee, R. Morales, M.A. Albiter, F. Zaera*, PNAS, October 7, 2008, vol. 105, no. 40, pp. 15241-15246.
http://www.pnas.org/content/105/40/15241.abstract
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