 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
1 O- |/ E" C4 {如果是中国长大的,英语能到这种程度真是很不简单。
; i/ w* I: h- ~: p0 d' Z* {; l, f6 ]/ K4 L3 @
http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
; {, l6 S9 H; {2 X6 m1 v- Z$ \0 d
1 \. m; }8 \; y, e8 M% nFROM LAI JIANG, Department of Chemistry, University of Pennsylvania+ F7 p3 j2 g6 w4 D& i
' f& n6 y5 I! V. yIt is a shame to see Nature — which nearly all scientists, including myself
1 v" R/ q. |( A& P; y! n3 l, regard as one of the most prestigious and influential physical-science
" |+ o% K- O# i, w" cmagazines — publish a thinly veiled biased article like this. Granted, this
) E8 e5 q/ \ k$ Mis not a peer-reviewed scientific article and did not go through the
/ o/ R" m h5 \( h4 Tscrutiny of picking referees. But to serve as a channel for the general
7 e8 ]- O/ J6 v. s7 [) Opopulace to be in touch with and appreciate science, the authors and editors
3 A( D, q) h1 E8 O7 M( hshould at least present the readers with facts within the proper context,, J& X6 V) o5 g8 D, P6 ~
which they blatantly failed to do.
4 X0 ~, l, u/ a0 P1 j8 n% d8 o0 a
First, to identify Ye’s performance increase, Ewen Callaway compared her, I9 L+ p* E6 a2 |! c
Olympic 400-metre IM time with her performance at the World Championships in
! ]3 R' {+ |# N' |9 L( g0 P/ A2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “% E! b% \4 y& d# p
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
8 S3 ?1 A- D" w! E* K8 c! B% Npersonal best was 4:33.79 at the Asian Games in 2010. This leads to an0 U9 r; \% T4 x: \
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the. {, r5 r/ E( o% Z$ S& }. T: t- _& ]
difference between the gold and silver medal, I see no reason for 5.38 s to1 L/ ~0 n- v5 S& U8 T4 i2 ^. ~
be treated as 7 s.
" M& N* m- N. c5 ]2 `; c1 w3 U0 P2 b" [( x8 C
Second, as previously pointed out, Ye is only 16 years old and her body is# w6 {2 @; F) A1 N& ]5 X
still developing. Bettering oneself by 5 seconds over two years may seem# j8 [7 y0 I+ M5 g O' }7 g, L- s
impossible for an adult swimmer, but it certainly happens among youngsters.& h* f0 c' {" n& P+ H
An interview with Australian gold medallist Ian Thorpe revealed that his 400
7 ~2 ?8 D3 M; S- V-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
y1 {& N4 L$ e E* h, _For regular people, including Callaway, it may be hard to imagine what an
; ]+ P" x' W% }. xelite swimmer can achieve as he or she matures and undergoes scientific and
3 a) E+ }! K) B" xpersistent training. But jumping to the conclusion that it is “anomalous”
' y9 d) R- i! S4 rbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
, v9 c: ?" @! j& n9 K9 X+ h4 [% z! H* z, \
Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook" D- U1 z4 R8 a: C
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in. S4 d0 F% f# W8 l% i( l, @2 }
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
! U9 w5 }1 {9 C7 a1 X$ Yhe chose not to push himself too hard and to conserve his energy for later. q/ |2 P$ @ {' b f9 }, a! o
events (whether this conforms to the Olympic spirit and the ‘use one’s
$ Q* l9 E* H; fbest efforts to win a match’ requirement that the Badminton World
. R# l7 c5 O! iFederation recently invoked to disqualify four badminton pairs is another
& W& w d& v# w9 P( r' Qtopic worth discussing, though probably not in Nature). Ye, on the other
/ [. Y n# w7 B8 x. `hand, was trailing behind after the first 300 metres and relied on freestyle
) r2 u/ m" \* g9 ], in which she has an edge, to win the race. Failing to mention this
2 R l* [) p5 g5 h( y: G- {4 Dstrategic difference, as well as the fact that Lochte is 23.25 seconds
, f+ x- T7 w! z6 a. n. b; R% A4 s8 vfaster (4:05.18) than Ye overall, creates the illusion that a woman swam
2 t) j8 N) _) Afaster than the best man in the same sport, which sounds impossible. Putting
% {1 @, s: T0 q3 _- `/ z/ u) Yaside the gender argument, I believe this is still a leading question that) b* |0 L. x$ u$ p: C+ }9 O
implies to the reader that there is something fishy going on.; I/ T/ a7 U+ V4 c" Y7 j
4 N+ j0 y* }/ S! p
Fourth is another example of cherry-picking. In the same event, there are
( V8 o4 n# S% Q9 p' cfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93' x' R5 u* C- C+ g2 a( p
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s' B( x% J& \! l# z# w( z1 Z1 k
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
$ Y7 ]) }1 i6 k! A: Bout, if we are just talking about the last 50 metres in a 400-metre IM,3 E5 S! O( P' L7 U- v
Lochter is not the example I would have used if I were the author. What kind5 m% X& z! C7 e# `) }, A8 u$ S ]5 ~
of scientific rigorousness is Callaway trying to demonstrate here? Is it" v9 P; a) p* o( k8 [) a7 R( F
logical that if Lochter is the champion, we should assume that he leads in- p) A# V! `7 e* V
every split? That would be a terrible way to teach the public how science
6 q# j# D7 _/ S1 {. ]1 @works.+ o. t* c2 G5 e' c7 r
^8 C: U/ D( |6 w: WFifth is the issue I oppose the most. Callaway quotes Ross Tucker and
/ S; g5 C7 l- F# u5 X5 d( Zimplies that a drug test cannot rule out the possibility of doping. Is this8 N1 V s2 j5 }" s4 f
kind of agnosticism what Nature really wants to teach its readers? By that
5 t( A' \3 T ?: r- u& Hstandard, I estimate that at least half of the peer-reviewed scientific1 {6 L2 i8 x6 M! U3 v
papers in Nature should be retracted. How can one convince the editors and
4 U$ J8 O1 O0 ~; J9 H; K/ B- Ureviewers that their proposed theory works for every possible case? One
; g2 H+ l- z) P: n: m* g+ R$ dcannot. One chooses to apply the theory to typical examples and to/ u x0 u5 T, [
demonstrate that in (hopefully) all scenarios considered, the theory works
+ m3 _# s9 X3 j; }# d0 ?to a degree, and that that should warrant publication until a counterexample
' i( I% d" |* Qis found. I could imagine that Callaway has a sceptical mind, which is
' g$ }1 i4 c4 F6 M; A3 T% acrucial to scientific thinking, but that would be put to better use if he
0 a+ C) S3 o6 }6 Twrote a peer-reviewed paper that discussed the odds of Ye doping on a highly5 p- L: w+ `* {9 i( u
advanced, non-detectable drug that the Chinese have come up with in the
: o* |0 L" ]1 ]past 4 years (they obviously did not have it in Beijing, otherwise why not; c6 ^, e Y- A, b
use it and woo the audience at home?), based on data and rational derivation* |: I& X5 q0 k! E6 X
. This article, however, can be interpreted as saying that all athletes are
8 s* _/ ~8 a' @" C5 a: H( @doping and the authorities are just not good enough to catch them. That may
' D) i# j- J/ f5 ?* I. x9 c& p* kbe true, logically, but definitely will not make the case if there is ever a' w9 P) Y) p1 T; }# T5 M
hearing by the governing body for water sports, FINA, to determine if Ye7 X7 G& l, w# J8 l7 a% n, l
has doped. To ask whether it is possible to obtain a false negative in a% k2 a" e$ V( r6 p% ]" o4 I$ S
drug test looks like a rigged question to me. Of course it is possible:, p9 _$ r0 s, z7 T2 A
other than the athlete taking a drug that the test is not designed to detect
3 U0 m" c9 M# N6 C9 O$ a* d# @: b, anyone who has taken quantum 101 will tell you that everything is& G) d, E3 J8 q e! h a! e
probabilistic in nature, and so there is a probability that the drug in an
& h" S- l0 E# [1 t: {- \. c& M5 fathlete’s system could tunnel out right at the moment of the test. A slight$ {; Z) f8 _! l. t0 Y& Y# X
chance it may be, but should we disregard all test results because of it?
7 ^0 _& y7 h4 b+ V, O( a/ N2 N' x2 y$ i4 O# jLet’s be practical and reasonable, and accept that the World Anti-Doping
& a, t' n) D7 B7 t0 E" Dagency (WADA) is competent at its job. Ye’s urine sample will be stored for" S e' P* G% q% K( K5 R* ^
eight years after the contest for future testing as technology advances.
/ n& D% V. ~! l4 aInnocent until proven guilty, shouldn’t it be? K4 _, M# m4 I) Q
/ ^/ _) K2 r) w% dSixth, and the last point I would like to make, is that the out-of-
) Q2 C( W& ^: `1 @6 q& T8 r8 _, xcompetition drug test is already in effect, which Callaway failed to mention
( d" |% |4 O( {- s+ D! W. As noted in the president of WADA’s press release, drug testing for
" z) \, ~3 o# l( ~/ mOlympians began at least six months before the opening of the London: @6 F$ n3 D+ |" M) _' a
Olympics. Furthermore, 107 athletes have been banned from this Olympics for
6 N+ _3 J% Q5 `! f" A( s! X$ qdoping. That may be the reason that “everyone will pass at the Olympic
6 P+ c$ W. }1 B" u. |games. Hardly anyone fails in competition testing” — those who did dope5 I' P/ \ M1 [/ L
have already been caught and sanctioned. Callaway is free to suggest that a( Z" o5 D; v# V4 {
player could have doped beforehand and fooled the test at the game, but this
, Z- y6 O0 Y$ {% w) qpossibility is certainly ruled out for Ye." a; |+ n4 O7 q/ H% N: Z. k1 v
; r1 I4 K$ a" b5 }1 N1 X. T' UOver all, even though Callaway did not falsify any data, he did (
, [2 b! n9 c9 o9 C- xintentionally or not) cherry-pick data that, in my view, are far too$ `- ^/ f9 |6 E) T# y2 A
suggestive to be fair and unbiased. If you want to cover a story of a
, X5 C( F" [/ n. Z2 i4 ]suspected doping from a scientific point of view, be impartial and provide3 E! g) P% L" g" _) A- N
all the facts for the reader to judge. You are entitled to your: E) t9 I7 a5 ?5 A
interpretation of the facts, and the expression thereof in your piece,
& l1 S+ C5 h. m0 A& U% {explicitly or otherwise, but showing only evidence that favours your i$ [% ?+ } W) c: f- A
argument is hardly good science or journalism. Such an article in a journal
- P0 H. Z5 s8 \such as Nature is not an appropriate example of how scientific research or
, c, N) x) K7 w+ U1 F" creporting should be done. |
|