 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
! X- M3 Y" ?) K如果是中国长大的,英语能到这种程度真是很不简单。
?7 v& d; f6 G
; O7 H4 y6 a3 ^3 Z) chttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html+ M9 K% }0 ?; D6 T- o' K& ?
$ r: h" z" _8 H0 @% YFROM LAI JIANG, Department of Chemistry, University of Pennsylvania% q8 i; o- H9 X. B( Z2 m
# R3 K& s6 G+ w9 X
It is a shame to see Nature — which nearly all scientists, including myself
4 a! |6 l1 c; M9 ~, regard as one of the most prestigious and influential physical-science# J1 P' _8 G8 R2 G& `) T7 l/ p" K
magazines — publish a thinly veiled biased article like this. Granted, this
; U! A H; y5 s6 a+ f# ]is not a peer-reviewed scientific article and did not go through the* M: @' V1 ^* h' S$ k
scrutiny of picking referees. But to serve as a channel for the general
4 ^( D/ D' w' P0 _# Apopulace to be in touch with and appreciate science, the authors and editors! D# t( x+ J. g3 N& Y. c% c- a
should at least present the readers with facts within the proper context,2 K& G: S2 }: Y" \8 x) H0 Y
which they blatantly failed to do." Z6 C- ]5 o6 g2 a0 H( e( |
. o) C+ Z8 p) N) r/ c: x/ b4 }1 F
First, to identify Ye’s performance increase, Ewen Callaway compared her2 W% v& i0 m. O# I: M2 Y6 \9 u* V* p+ F
Olympic 400-metre IM time with her performance at the World Championships in2 o3 T" b+ b$ Z: O& p8 T
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
+ h8 w3 d) x8 s) }* S& xanomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
- Y+ Q$ ~ A8 a2 I5 @personal best was 4:33.79 at the Asian Games in 2010. This leads to an
' H) S2 a( o0 Y5 |( Wimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the
h$ {' T; [; n) n9 [: zdifference between the gold and silver medal, I see no reason for 5.38 s to& N% K( f( r. Y9 s- q9 Q
be treated as 7 s./ J+ g+ A6 O: y4 t/ Z6 n, x
: B3 z4 C. q7 C8 s8 F$ e4 M+ \Second, as previously pointed out, Ye is only 16 years old and her body is
/ J* K; G5 {) U& istill developing. Bettering oneself by 5 seconds over two years may seem
! a) B! G+ y1 t9 K1 uimpossible for an adult swimmer, but it certainly happens among youngsters.# s$ G( r/ h% V ]( F6 L8 Q. z! K- U
An interview with Australian gold medallist Ian Thorpe revealed that his 400
5 ?" L, N; L9 o8 r) [3 r% ~: b-metre freestyle time improved by 5 seconds between the ages of 15 and 16.1 \- o6 F- T& \- s5 l
For regular people, including Callaway, it may be hard to imagine what an
# Z! t5 n0 ^9 O8 Q# w Ielite swimmer can achieve as he or she matures and undergoes scientific and% W* Q8 C% q" q! R2 d# y
persistent training. But jumping to the conclusion that it is “anomalous”% p5 |- ]% q2 U* Y
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
& I2 c& @6 X) F2 Q0 z" z
& z# J4 A% g8 G$ W9 IThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook4 e8 x9 F6 s# o
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in7 Y! Y( U# h9 I( {! r5 \
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
' i& Z" q4 Y- jhe chose not to push himself too hard and to conserve his energy for later
$ L, S$ x* Y4 Q1 s9 U# Q# ?1 {events (whether this conforms to the Olympic spirit and the ‘use one’s3 z1 n: ?; G6 L# X. S
best efforts to win a match’ requirement that the Badminton World. z; ~ A" h7 o( d) ~; B. r
Federation recently invoked to disqualify four badminton pairs is another- i1 p7 |' R7 T4 l8 X: e k
topic worth discussing, though probably not in Nature). Ye, on the other8 h) x0 z& `. ~
hand, was trailing behind after the first 300 metres and relied on freestyle! ^& a+ T4 ?2 k) ~! k
, in which she has an edge, to win the race. Failing to mention this# ^! _; h, o A" X
strategic difference, as well as the fact that Lochte is 23.25 seconds
2 r7 |( m1 j7 Y) p+ h8 X3 dfaster (4:05.18) than Ye overall, creates the illusion that a woman swam
8 A0 p0 [ V2 ^, s, rfaster than the best man in the same sport, which sounds impossible. Putting
: i# A$ w( X! @4 C/ Yaside the gender argument, I believe this is still a leading question that, |( x; C2 c; G9 M2 {$ U
implies to the reader that there is something fishy going on.# d* h/ }) g" U# u6 a' Z
( T( I+ r' Q, U% [ s
Fourth is another example of cherry-picking. In the same event, there are. N+ `1 }% y( X, q% m2 l
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93& v- ^6 e5 k, n; E& F& q
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
$ @8 f) ^6 K+ \0 x `: u8 K- o2 ^), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
8 P6 e" v7 B5 ?$ K3 n; H. A, Mout, if we are just talking about the last 50 metres in a 400-metre IM,
' F& H5 {+ j1 r' |* F& Z$ fLochter is not the example I would have used if I were the author. What kind4 c# w* i$ J3 k% i8 Q
of scientific rigorousness is Callaway trying to demonstrate here? Is it
% B4 K' x8 u; s8 Y: R; ological that if Lochter is the champion, we should assume that he leads in1 K5 v# f1 Y1 X- z! p) W
every split? That would be a terrible way to teach the public how science
- ~- |# I! a- F9 {" fworks.
2 D8 a- `* I4 O& e; m! _3 e2 u/ t0 s
Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and) B4 M/ n& {1 M0 v6 l3 w
implies that a drug test cannot rule out the possibility of doping. Is this
) V: H0 p5 ^; J" W1 ekind of agnosticism what Nature really wants to teach its readers? By that
1 T6 E% T# R% w6 V) }# ^; xstandard, I estimate that at least half of the peer-reviewed scientific
" J* V' N A, tpapers in Nature should be retracted. How can one convince the editors and" F) K4 C$ x1 @# ]( F
reviewers that their proposed theory works for every possible case? One( Q- e V( Q( h- ~, I8 b
cannot. One chooses to apply the theory to typical examples and to7 ~& I [" f) g
demonstrate that in (hopefully) all scenarios considered, the theory works
: J2 P, Y5 P. F; F2 @to a degree, and that that should warrant publication until a counterexample; p2 u7 u% n- [* H$ x9 q5 x
is found. I could imagine that Callaway has a sceptical mind, which is) [+ q1 ?1 T$ M7 g2 G
crucial to scientific thinking, but that would be put to better use if he5 A1 P' e7 ?- l( w) d
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly$ y2 F; X- l6 M
advanced, non-detectable drug that the Chinese have come up with in the
- I5 N4 S: R; O8 t- zpast 4 years (they obviously did not have it in Beijing, otherwise why not
6 h* R, N9 [9 J( Xuse it and woo the audience at home?), based on data and rational derivation G& I) j5 K$ J+ j# q& _! _
. This article, however, can be interpreted as saying that all athletes are. Q. V# {: Z+ A; h1 v0 g& A
doping and the authorities are just not good enough to catch them. That may
& ]' w W! s* D m' Ybe true, logically, but definitely will not make the case if there is ever a6 K; |- V: ~$ l) o
hearing by the governing body for water sports, FINA, to determine if Ye
( @& I; D# M! r% b, J- bhas doped. To ask whether it is possible to obtain a false negative in a
* b) c# h+ A: H* J( N$ D, Fdrug test looks like a rigged question to me. Of course it is possible:
/ H; k- } `, r! F; B) Kother than the athlete taking a drug that the test is not designed to detect
6 v2 V% h: K# M, ]- X, anyone who has taken quantum 101 will tell you that everything is1 O( g- l8 {$ L# Y' L
probabilistic in nature, and so there is a probability that the drug in an
]; j/ @8 u( Mathlete’s system could tunnel out right at the moment of the test. A slight* @# {" M q% T9 \" Q
chance it may be, but should we disregard all test results because of it?, k# D+ D4 l) O J h
Let’s be practical and reasonable, and accept that the World Anti-Doping3 `: u- l' T& M" J
agency (WADA) is competent at its job. Ye’s urine sample will be stored for" ]9 P- t1 ?/ l" [
eight years after the contest for future testing as technology advances.; a- a' K: j L$ H. J" L: p% @- x
Innocent until proven guilty, shouldn’t it be?) ~9 v& ]; m6 l* S& I% }
& m b6 V; _; KSixth, and the last point I would like to make, is that the out-of-
! R8 y/ i( d3 |+ E! Ocompetition drug test is already in effect, which Callaway failed to mention1 @! P7 @ O# c0 n9 A, ]( Q
. As noted in the president of WADA’s press release, drug testing for* ^, H2 C* y" m }& S, ?
Olympians began at least six months before the opening of the London7 j7 U5 A# m6 _( g
Olympics. Furthermore, 107 athletes have been banned from this Olympics for
' p- i' X6 {. E' g" `) N/ Rdoping. That may be the reason that “everyone will pass at the Olympic
, w$ [3 R5 v. b# [games. Hardly anyone fails in competition testing” — those who did dope
7 q; p4 g) V8 A; d$ n! ?7 _have already been caught and sanctioned. Callaway is free to suggest that a T/ b" [' ?; s* a) [+ ]% B: S# e
player could have doped beforehand and fooled the test at the game, but this- [3 S/ r3 l% S) N$ Q, k& C0 w5 g
possibility is certainly ruled out for Ye.
* T! ]1 \& w X9 p. G0 a' Q! h* e/ h( p3 K
Over all, even though Callaway did not falsify any data, he did ($ Y* X2 w: y) P2 o+ G
intentionally or not) cherry-pick data that, in my view, are far too) ]% F9 K9 _/ `. i& D
suggestive to be fair and unbiased. If you want to cover a story of a
; U4 g0 Q; U# }& F! Osuspected doping from a scientific point of view, be impartial and provide
1 I' D8 J! S/ r& v8 B3 F! |all the facts for the reader to judge. You are entitled to your
* ?5 N/ L& l) t' Hinterpretation of the facts, and the expression thereof in your piece,
* a( o. d4 R' J$ E& u+ Gexplicitly or otherwise, but showing only evidence that favours your
( r* G" j- i8 C8 X1 margument is hardly good science or journalism. Such an article in a journal
# c$ ]! u# \1 Ssuch as Nature is not an appropriate example of how scientific research or
8 C) |& b, g3 M/ I- z4 T l; j# ^reporting should be done. |
|