 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
* W2 O, ?/ B6 J) _8 h) ]如果是中国长大的,英语能到这种程度真是很不简单。
: X2 \) K Z9 |. t3 Q( c8 n$ b
5 ?) [" P) ^! o5 I5 x7 ]- s- Vhttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
4 H$ e7 H0 l( \& @& y; O
" f |( P5 Q+ VFROM LAI JIANG, Department of Chemistry, University of Pennsylvania
% H$ y- L- D, z- {
8 `2 t" W; {4 b% r0 Z4 C' DIt is a shame to see Nature — which nearly all scientists, including myself- P7 }, O' j+ N6 s$ O2 e
, regard as one of the most prestigious and influential physical-science- }' U- u- N5 L* \1 U" d$ F
magazines — publish a thinly veiled biased article like this. Granted, this _3 y* D+ r# @. @
is not a peer-reviewed scientific article and did not go through the
; Y( L0 d/ M& l; Sscrutiny of picking referees. But to serve as a channel for the general/ P4 Q6 Y9 S9 n3 f$ X9 D
populace to be in touch with and appreciate science, the authors and editors
9 z# U: b: i; V: I: g/ i' Oshould at least present the readers with facts within the proper context,, H- p8 \1 ?* ~7 b% f
which they blatantly failed to do.% t; I: x9 W# q W8 T# P
1 i3 ]! x0 y8 {0 A1 ?( oFirst, to identify Ye’s performance increase, Ewen Callaway compared her; P- O! g) G3 o* {9 j
Olympic 400-metre IM time with her performance at the World Championships in8 P1 n9 I* L2 T, q' H& \4 `
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
5 y. O6 Y a. C* u( Zanomalous” improvement of around 7 seconds (6.72 s). In fact, her previous! z3 y9 t1 e3 L5 _3 n
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
' M9 z# L# {. i; Y5 A0 ]/ v, f( kimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the, g' s6 z( m9 g: d, Y
difference between the gold and silver medal, I see no reason for 5.38 s to
7 l/ A" R+ A' m7 obe treated as 7 s.+ G* y" j# S% {5 \7 D
! t; R6 \3 V* LSecond, as previously pointed out, Ye is only 16 years old and her body is
- B: j2 [# O* hstill developing. Bettering oneself by 5 seconds over two years may seem
: }0 R1 F& h( p* Nimpossible for an adult swimmer, but it certainly happens among youngsters.
! e* e. i3 g6 I6 X! I/ CAn interview with Australian gold medallist Ian Thorpe revealed that his 400, b1 t6 y2 y; K& w' d! t6 `& v- D
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.4 l2 ]- [$ g! E5 i/ F* N" a
For regular people, including Callaway, it may be hard to imagine what an& d+ G6 H& o# V2 W6 L* Q1 O) A& I7 P
elite swimmer can achieve as he or she matures and undergoes scientific and, C0 ?. X2 @! r0 @
persistent training. But jumping to the conclusion that it is “anomalous”9 B8 g# U& x" _
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
- p4 c! q( s Y0 O5 B% p. _% Y% p3 D
Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
a5 q! |; Q' E( X" @example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in9 m# U: w3 J; v
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so" G9 a& W. T7 l# u
he chose not to push himself too hard and to conserve his energy for later# E; j7 s4 q* n: X
events (whether this conforms to the Olympic spirit and the ‘use one’s
( G! e3 a* k6 O8 G+ i# `8 e1 s3 fbest efforts to win a match’ requirement that the Badminton World
" ^) C8 S; _, |) H* KFederation recently invoked to disqualify four badminton pairs is another: O3 Q" }( l' }+ t3 B2 P
topic worth discussing, though probably not in Nature). Ye, on the other* o; _5 o. z8 H( P* x
hand, was trailing behind after the first 300 metres and relied on freestyle
+ ]* U( }6 z3 W, in which she has an edge, to win the race. Failing to mention this4 D8 X q0 y, F4 f+ Q* A
strategic difference, as well as the fact that Lochte is 23.25 seconds0 M0 a, B+ K; f8 Z7 n
faster (4:05.18) than Ye overall, creates the illusion that a woman swam
& e `) I! i8 p# ]) @, f. M! |3 ]+ T5 ofaster than the best man in the same sport, which sounds impossible. Putting
4 r4 H3 j! \+ L6 q5 t4 u) baside the gender argument, I believe this is still a leading question that
) r7 L9 W. p. D! a" Pimplies to the reader that there is something fishy going on.
1 ~! s( m+ l; }# `. T( Y! F9 Z+ G" ^ i- `- h/ j
Fourth is another example of cherry-picking. In the same event, there are. H; C' `8 V8 g
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
# D7 Q6 R4 U4 gs) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
) a6 S" F& W* r& C# ]0 D9 ]), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns! I1 L# ~$ P2 i9 L2 p o
out, if we are just talking about the last 50 metres in a 400-metre IM,
; |) K; ?3 H- ]Lochter is not the example I would have used if I were the author. What kind' K' O& A& Y" @' {: [5 q* n8 {
of scientific rigorousness is Callaway trying to demonstrate here? Is it
6 {: i# p0 s' ^* M9 p, k' Dlogical that if Lochter is the champion, we should assume that he leads in
, N! |) D1 Q+ T6 Pevery split? That would be a terrible way to teach the public how science
/ u. h+ l( J/ a/ C3 b( yworks.: H: b" R0 N, Z
, [) Y; k& N$ S: d6 k {! m, M
Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
4 h0 H2 {' U* Z4 Himplies that a drug test cannot rule out the possibility of doping. Is this# I3 x# l$ t$ p: U0 @
kind of agnosticism what Nature really wants to teach its readers? By that0 W0 O: i- j8 E" ]9 _8 t+ @# v
standard, I estimate that at least half of the peer-reviewed scientific
- r+ \+ f' y' B. x# R( s! e: Dpapers in Nature should be retracted. How can one convince the editors and
/ e1 W5 r3 t0 K4 Z3 h: |9 Hreviewers that their proposed theory works for every possible case? One
! j- W( Q: E8 [' h$ l/ Ccannot. One chooses to apply the theory to typical examples and to
) {6 W: y, k2 Y }7 R5 ^0 S( ydemonstrate that in (hopefully) all scenarios considered, the theory works
& u/ M' T9 o' @; }8 qto a degree, and that that should warrant publication until a counterexample
# r0 D) Q! f+ R$ wis found. I could imagine that Callaway has a sceptical mind, which is
6 t6 l3 `3 Y/ G$ e, L- Q/ w" `% ocrucial to scientific thinking, but that would be put to better use if he; \3 O! T: X" b, F2 B: p
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly ^% u j4 }( E* v. m9 z, y5 F
advanced, non-detectable drug that the Chinese have come up with in the& z" r) U7 f$ y0 m/ X6 s7 w
past 4 years (they obviously did not have it in Beijing, otherwise why not
3 s% [0 f( R$ V& t- Fuse it and woo the audience at home?), based on data and rational derivation; {8 L; i A! y3 L6 R, t4 V8 ~% Y. k
. This article, however, can be interpreted as saying that all athletes are7 c% x, K0 t! P- ^3 D* ?
doping and the authorities are just not good enough to catch them. That may* N d7 Q5 e9 o' p. n2 a* i: h
be true, logically, but definitely will not make the case if there is ever a) @: [$ o& [) r: S) |
hearing by the governing body for water sports, FINA, to determine if Ye: N) S3 K" L8 Q. L' D% w( g
has doped. To ask whether it is possible to obtain a false negative in a
& }0 o7 b* m) d& v, @drug test looks like a rigged question to me. Of course it is possible:
0 a% }; U( P+ S7 Qother than the athlete taking a drug that the test is not designed to detect
' l5 s% o; a" [8 r1 F% C, anyone who has taken quantum 101 will tell you that everything is9 E& w& [1 Y( M8 X/ L( g
probabilistic in nature, and so there is a probability that the drug in an
, |% c8 ^5 }, f. }* hathlete’s system could tunnel out right at the moment of the test. A slight
6 V. Y2 V0 l+ H5 mchance it may be, but should we disregard all test results because of it?$ @: I8 }( d# B4 K
Let’s be practical and reasonable, and accept that the World Anti-Doping
+ n' u, ^/ |3 S! Zagency (WADA) is competent at its job. Ye’s urine sample will be stored for
( e* R! h/ K& |' `! P0 U8 aeight years after the contest for future testing as technology advances.4 j I" w8 Y( b, t0 [
Innocent until proven guilty, shouldn’t it be?& J r$ G$ x: d2 u( l
" f: L! @- \ f: a4 \5 ^3 t# cSixth, and the last point I would like to make, is that the out-of-
# G: s2 o8 q4 l: Vcompetition drug test is already in effect, which Callaway failed to mention
* d2 b, z% N* b6 i, y/ j* L2 O. As noted in the president of WADA’s press release, drug testing for$ U& u1 `) {; s4 ]
Olympians began at least six months before the opening of the London' T2 U( W+ ^( ]8 ~' ^8 G: Q8 | c8 ~
Olympics. Furthermore, 107 athletes have been banned from this Olympics for! L7 x0 L: q g# f
doping. That may be the reason that “everyone will pass at the Olympic
; G6 c- }/ H/ `+ fgames. Hardly anyone fails in competition testing” — those who did dope
- n7 R% y; }0 `5 Xhave already been caught and sanctioned. Callaway is free to suggest that a) f$ ?4 V2 X# H+ ]: t
player could have doped beforehand and fooled the test at the game, but this
: T, h; S+ j0 W$ u. Opossibility is certainly ruled out for Ye.6 u) P6 B/ x& H
1 ^5 g2 N6 \4 } h+ {6 f0 z# b
Over all, even though Callaway did not falsify any data, he did (9 s# [7 K) ?1 W5 T5 l2 T0 p
intentionally or not) cherry-pick data that, in my view, are far too9 U9 E7 |; b y! h8 z7 j) j
suggestive to be fair and unbiased. If you want to cover a story of a& k; [* U5 |6 q& K9 \3 J' o7 Z
suspected doping from a scientific point of view, be impartial and provide: M, b1 @5 C8 `( z' @: t! M: ^ a
all the facts for the reader to judge. You are entitled to your
; d% J# H1 H3 H/ r5 Ainterpretation of the facts, and the expression thereof in your piece,
4 S0 Q( m% y4 g- Fexplicitly or otherwise, but showing only evidence that favours your
! w/ q2 l5 z6 q5 G( vargument is hardly good science or journalism. Such an article in a journal
' e/ W, q# @ J# T7 [such as Nature is not an appropriate example of how scientific research or
6 U. _ U' x7 a f' F4 H2 Z& m% Lreporting should be done. |
|