 鲜花( 5)  鸡蛋( 6)
|

楼主 |
发表于 2012-8-14 00:55
|
显示全部楼层
其实比饶毅更牛的回复是 Upenn 的 LAI JIANG, U3 x* r; r' i1 }; C
如果是中国长大的,英语能到这种程度真是很不简单。
' Y* ~( O% P5 V& z- x* V- D. ~/ M7 f K- ?/ o# J8 |
http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
[- V* H0 A" W2 L) i/ z) g
7 l# o8 k1 u' T& e, lFROM LAI JIANG, Department of Chemistry, University of Pennsylvania
& P; ^1 @ e5 z E; y6 r' b. ]" e4 N- |3 [/ @ d" q
It is a shame to see Nature — which nearly all scientists, including myself
a: B# R) |9 B' K* y, regard as one of the most prestigious and influential physical-science- i- L S$ c6 T+ U k# ^
magazines — publish a thinly veiled biased article like this. Granted, this/ j8 k) b! V' J; Y
is not a peer-reviewed scientific article and did not go through the
' ?/ M! o( t# I |$ \scrutiny of picking referees. But to serve as a channel for the general
4 H* |" P3 Y9 M' j0 ~populace to be in touch with and appreciate science, the authors and editors
) k6 Z& D" x! ishould at least present the readers with facts within the proper context,5 J! @8 t) N `6 e) S Z1 b. B
which they blatantly failed to do.
5 `+ _( }; `; N1 [/ i! F; O9 ~, V* p
First, to identify Ye’s performance increase, Ewen Callaway compared her
/ w5 W7 p. l- bOlympic 400-metre IM time with her performance at the World Championships in
& P- \. e/ ~+ v( b! h2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “" l1 \% S4 R% o1 o* ], _* Y
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous( E% B- g4 n! g% E) L. {& v
personal best was 4:33.79 at the Asian Games in 2010. This leads to an) O6 [" K3 |% `: x5 C" y9 E
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the; u* X+ ^+ j! e
difference between the gold and silver medal, I see no reason for 5.38 s to" |" o$ d7 i; N, }- ?* ]$ J
be treated as 7 s.
3 ?; ]4 i. X1 k2 X5 Z+ x
* S$ V/ C' j7 c, J# rSecond, as previously pointed out, Ye is only 16 years old and her body is
" T' `$ x# M. N5 D7 G$ v/ i( ?still developing. Bettering oneself by 5 seconds over two years may seem
) ? m" k0 R O9 Cimpossible for an adult swimmer, but it certainly happens among youngsters.
5 N: @- t7 E. wAn interview with Australian gold medallist Ian Thorpe revealed that his 400
( {; F5 |( A& R w' L' P% T% A-metre freestyle time improved by 5 seconds between the ages of 15 and 16.8 O( j/ p; U" w
For regular people, including Callaway, it may be hard to imagine what an% P+ b Y1 t6 x. b
elite swimmer can achieve as he or she matures and undergoes scientific and
' O1 k& |) h3 }2 n1 g% kpersistent training. But jumping to the conclusion that it is “anomalous”0 h. o: ]) l1 o3 J9 c/ @
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
8 R" w3 n7 \' j/ }# v: }9 N* ~# d% ?
* q! K2 p$ ]3 h; hThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
) [$ N. _) K$ `8 X) B. P" U' jexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in8 J. H+ t2 A5 u {1 k9 i
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so3 p, R8 X- Q# C6 I/ {, [; d
he chose not to push himself too hard and to conserve his energy for later% r' p9 r3 T/ Y1 l; D* D2 y2 b
events (whether this conforms to the Olympic spirit and the ‘use one’s! g _: ?+ w% f$ n% X4 _+ A3 j# J; g
best efforts to win a match’ requirement that the Badminton World8 N% q+ [, d. Y: _, I' h" A
Federation recently invoked to disqualify four badminton pairs is another
+ q4 Y3 |7 s: }3 z& K- s2 Vtopic worth discussing, though probably not in Nature). Ye, on the other, R b$ d" B: S: _$ H) {
hand, was trailing behind after the first 300 metres and relied on freestyle
3 V' @- M7 X" ]: k( _8 p; `$ O* Q, in which she has an edge, to win the race. Failing to mention this/ N1 q/ q7 V% L U
strategic difference, as well as the fact that Lochte is 23.25 seconds" I* k r$ c8 w/ E/ N2 X
faster (4:05.18) than Ye overall, creates the illusion that a woman swam
: ?6 p( r; J& n' g" k( Kfaster than the best man in the same sport, which sounds impossible. Putting
3 n$ m# R1 @* D* j2 i. J* Gaside the gender argument, I believe this is still a leading question that" t$ ~, x: @ S
implies to the reader that there is something fishy going on.3 o& x! a* M: S
9 u, z, J8 J7 H$ _/ m" z' aFourth is another example of cherry-picking. In the same event, there are& S2 q. s ^, C; K) g# f% S1 {. K
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93: @6 o, n* X, }, |
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
, S6 {4 i V' _% R1 N. C; v- j), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns! A0 T; F& Q- T/ r. a1 c( Z
out, if we are just talking about the last 50 metres in a 400-metre IM,3 F0 f+ t2 J' N9 o }: y
Lochter is not the example I would have used if I were the author. What kind4 B5 Q" i9 n) m( @
of scientific rigorousness is Callaway trying to demonstrate here? Is it
# ^ C) i; Z( \# }/ ~5 T( H9 glogical that if Lochter is the champion, we should assume that he leads in. S8 |! o5 o5 D! y2 |1 ^
every split? That would be a terrible way to teach the public how science
4 y" L5 H& V( `. a( Dworks.
/ u' P- b% ^% P+ l+ E! ~' ?% P q4 O/ S& w
Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
- k0 @5 W" {, ^% eimplies that a drug test cannot rule out the possibility of doping. Is this ^ B* s2 g5 [: z, X3 j
kind of agnosticism what Nature really wants to teach its readers? By that4 j0 l1 V$ ~" O( U' L+ {
standard, I estimate that at least half of the peer-reviewed scientific/ w s* x% B* w7 E
papers in Nature should be retracted. How can one convince the editors and
+ a; [# v- s5 k0 Mreviewers that their proposed theory works for every possible case? One. A: r: J2 V* M7 M
cannot. One chooses to apply the theory to typical examples and to2 Z5 r$ ]1 B8 I8 J5 @% `
demonstrate that in (hopefully) all scenarios considered, the theory works
* n" k& Q7 g' Q" X0 y; p, k/ |to a degree, and that that should warrant publication until a counterexample- @. C( c7 ?( h+ t, a' J1 {
is found. I could imagine that Callaway has a sceptical mind, which is
, u3 t4 c: T$ a6 d- y# \crucial to scientific thinking, but that would be put to better use if he
- i/ q) l n0 @4 Z" r! |) ^wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
: q& J' ^( Y, E9 vadvanced, non-detectable drug that the Chinese have come up with in the
- M) u. f* r9 X" Kpast 4 years (they obviously did not have it in Beijing, otherwise why not3 v' r1 Z& c4 v8 F
use it and woo the audience at home?), based on data and rational derivation
* l) O6 {' @" H2 m) M. This article, however, can be interpreted as saying that all athletes are$ q4 W2 F; N0 c6 c2 y0 Z
doping and the authorities are just not good enough to catch them. That may0 v3 G. j. P' Z4 |' `/ v2 C7 X6 g! z; D
be true, logically, but definitely will not make the case if there is ever a
) u# l7 J9 B B- i/ Q' Yhearing by the governing body for water sports, FINA, to determine if Ye8 X+ C5 A/ J. S5 F
has doped. To ask whether it is possible to obtain a false negative in a, A6 _0 r7 u$ G) D+ h
drug test looks like a rigged question to me. Of course it is possible:
- u8 a& l. ~% A7 ~( s2 @: `other than the athlete taking a drug that the test is not designed to detect( V' h) z% n: _9 `! C
, anyone who has taken quantum 101 will tell you that everything is
[: @) J5 F3 ^probabilistic in nature, and so there is a probability that the drug in an# c V4 U/ H) B- T
athlete’s system could tunnel out right at the moment of the test. A slight I6 d5 @: `4 z# w* ~
chance it may be, but should we disregard all test results because of it?8 P. l+ [5 D9 G: S |
Let’s be practical and reasonable, and accept that the World Anti-Doping
2 A$ K7 E4 F* l3 s: T3 I" o6 Qagency (WADA) is competent at its job. Ye’s urine sample will be stored for
; s; U6 t% C1 u$ p+ ieight years after the contest for future testing as technology advances.
2 ]' M! C, S7 J4 H; ~Innocent until proven guilty, shouldn’t it be?
0 A, S7 b: x' n6 ]) |8 O5 R6 t, v! \) w/ r. a4 T' |
Sixth, and the last point I would like to make, is that the out-of-
l9 M h2 j- b; x- Tcompetition drug test is already in effect, which Callaway failed to mention
u1 s4 }9 I5 ~' T" ~! ]* z/ \6 B/ }. T. As noted in the president of WADA’s press release, drug testing for4 X. x7 h. X* D& F' K/ P
Olympians began at least six months before the opening of the London' O" J- x; U! h4 t8 |+ j0 v: j
Olympics. Furthermore, 107 athletes have been banned from this Olympics for5 i: `* o7 z' Y, `1 H/ c9 F
doping. That may be the reason that “everyone will pass at the Olympic% r W$ @7 o m U
games. Hardly anyone fails in competition testing” — those who did dope
$ R5 E# c- i+ ~; |: h; ]5 Dhave already been caught and sanctioned. Callaway is free to suggest that a7 s6 Q$ A/ ]! k+ L! e
player could have doped beforehand and fooled the test at the game, but this
7 j' Z1 }7 o" L; h$ zpossibility is certainly ruled out for Ye.1 n' [9 k0 @+ \ l: r' @
& `. P, S: d! Q7 O0 f
Over all, even though Callaway did not falsify any data, he did (; N# j" n& B% O( h2 j
intentionally or not) cherry-pick data that, in my view, are far too
0 C' ]( D7 u0 F v, |" u Asuggestive to be fair and unbiased. If you want to cover a story of a
x8 `2 J" J* S, C4 Ssuspected doping from a scientific point of view, be impartial and provide
+ X+ L* [2 Z6 s5 d( C$ ?$ mall the facts for the reader to judge. You are entitled to your4 M- B( s6 r* X
interpretation of the facts, and the expression thereof in your piece,- R" A1 ?2 P1 P% C
explicitly or otherwise, but showing only evidence that favours your
! o! K- \4 f- C( ~argument is hardly good science or journalism. Such an article in a journal
$ t/ t- g" Y: o3 ] f L; Usuch as Nature is not an appropriate example of how scientific research or2 L8 M% \3 d% r2 J% B) o
reporting should be done. |
|