ELIZA

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332920 occurrences (No.57 in the rank) during 5 years in the PubMed. [no cache] 500 found

332) This situation largely decouples materials substitution from price, thereby forcing material design changes to be primarily transformative rather than incremental.

--- ABSTRACT ---

PMID:24297915 DOI:10.1073/pnas.1312752110

2015 Proceedings of the National Academy of Sciences of the United States of America

* On the materials basis of modern society.

- It is indisputable that modern life is enabled by the use of materials in its technologies. Those technologies do many things very well, largely because each material is used for purposes to which it is exquisitely fitted. The result over time has been a steady increase in product performance. We show that this materials complexity has markedly increased in the past half-century and that elemental life cycle analyses characterize rates of recycling and loss. A further concern is that of possible scarcity of some of the elements as their use increases. Should materials availability constraints occur, the use of substitute materials comes to mind. We studied substitution potential by generating a comprehensive summary of potential substitutes for 62 different metals in all their major uses and of the performance of the substitutes in those applications. As we show herein, for a dozen different metals, the potential substitutes for their major uses are either inadequate or appear not to exist at all. Further, for not 1 of the 62 metals are exemplary substitutes available for all major uses. This situation largely decouples materials substitution from price, thereby forcing material design changes to be primarily transformative rather than incremental. As wealth and population increase worldwide in the next few decades, scientists will be increasingly challenged to maintain and improve product utility by designing new and better materials, but doing so under potential constraints in resource availability.

--- ABSTRACT END ---

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(2)31 of	(9)7 during	(16)3 over	(23)2 induced
(3)26 null	(10)6 may	(17)3 the	(24)2 or
(4)26 were	(11)5 at	(18)3 was	(25)2 related
(5)15 to	(12)4 on	(19)2 accompany	(26)2 seen
(6)13 and	(13)3 as	(20)2 can	(27)2 such
(7)8 are	(14)3 by	(21)2 could	(28)2 which

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--- WordNet output for changes --- Overview of noun change The noun change has 10 senses (first 7 from tagged texts) 1. (46) change, alteration, modification -- (an event that occurs when something passes from one state or phase to another; "the change was intended to increase sales"; "this storm is certainly a change for the worse"; "the neighborhood had undergone few modifications since his last visit years ago") 2. (45) change -- (a relational difference between states; especially between states before and after some event; "he attributed the change to their marriage") 3. (17) change -- (the action of changing something; "the change of government had no impact on the economy"; "his change on abortion cost him the election") 4. (13) change -- (the result of alteration or modification; "there were marked changes in the lining of the lungs"; "there had been no change in the mountains") 5. (2) change -- (the balance of money received when the amount you tender is greater than the amount due; "I paid with a twenty and pocketed the change") 6. (1) change -- (a thing that is different; "he inspected several changes before selecting one") 7. (1) change -- (a different or fresh set of clothes; "she brought a change in her overnight bag") 8. change -- (coins of small denomination regarded collectively; "he had a pocketful of change") 9. change -- (money received in return for its equivalent in a larger denomination or a different currency; "he got change for a twenty and used it to pay the taxi driver") 10. variety, change -- (a difference that is usually pleasant; "he goes to France for variety"; "it is a refreshing change to meet a woman mechanic") Overview of verb change The verb change has 10 senses (first 8 from tagged texts) 1. (57) change, alter, modify -- (cause to change; make different; cause a transformation; "The advent of the automobile may have altered the growth pattern of the city"; "The discussion has changed my thinking about the issue") 2. (54) change -- (undergo a change; become different in essence; losing one's or its original nature; "She changed completely as she grew older"; "The weather changed last night") 3. (13) change, alter, vary -- (become different in some particular way, without permanently losing one's or its former characteristics or essence; "her mood changes in accordance with the weather"; "The supermarket's selection of vegetables varies according to the season") 4. (7) switch, shift, change -- (lay aside, abandon, or leave for another; "switch to a different brand of beer"; "She switched psychiatrists"; "The car changed lanes") 5. (6) change -- (change clothes; put on different clothes; "Change before you go to the opera") 6. (5) change, exchange, commute, convert -- (exchange or replace with another, usually of the same kind or category; "Could you convert my dollars into pounds?"; "He changed his name"; "convert centimeters into inches"; "convert holdings into shares") 7. (3) exchange, change, interchange -- (give to, and receive from, one another; "Would you change places with me?"; "We have been exchanging letters for a year") 8. (3) transfer, change -- (change from one vehicle or transportation line to another; "She changed in Chicago on her way to the East coast") 9. deepen, change -- (become deeper in tone; "His voice began to change when he was 12 years old"; "Her voice deepened when she whispered the password") 10. change -- (remove or replace the coverings of; "Father had to learn how to change the baby"; "After each guest we changed the bed linens") --- WordNet end ---