 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 JIANG8 n; N& n K2 B+ g4 [
如果是中国长大的,英语能到这种程度真是很不简单。
: e4 A8 K! u4 w# k
' i' N& F' t, a: ^8 fhttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html( [/ \6 S, h5 ^) I1 W8 p
, t1 V2 A8 ^5 i4 S9 KFROM LAI JIANG, Department of Chemistry, University of Pennsylvania
7 ^0 W8 j# Q, a0 w) R% O
d* M( W4 @0 _/ k+ b; MIt is a shame to see Nature — which nearly all scientists, including myself& ]" f3 z" ~$ \6 }' D5 w7 A) Q# y
, regard as one of the most prestigious and influential physical-science" _: I5 P- Y$ u% z
magazines — publish a thinly veiled biased article like this. Granted, this
" A: K6 w9 `& ~" K% ^2 @: v; f- [4 ^is not a peer-reviewed scientific article and did not go through the( Y: ^8 x9 p6 p# c
scrutiny of picking referees. But to serve as a channel for the general7 @; c+ q. ^2 Y# V! d9 J' I
populace to be in touch with and appreciate science, the authors and editors* ~" G @. v) d( o- v& B- l
should at least present the readers with facts within the proper context,
& J* Y( p, r7 Q/ X* Owhich they blatantly failed to do.
( r4 S/ r. H# E$ s* L$ o- C
' f' m2 V" F5 \First, to identify Ye’s performance increase, Ewen Callaway compared her4 ]+ V1 l0 _& ^, P
Olympic 400-metre IM time with her performance at the World Championships in; `; w8 e* i2 u+ C
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “8 Z5 `: Z6 ?7 k* O
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
* X- W* l: o$ N& j1 y! gpersonal best was 4:33.79 at the Asian Games in 2010. This leads to an
) l. ]3 q& _) f" Q- c9 a5 l, ]improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the" h7 v) E3 J$ h& [* ~' l3 v
difference between the gold and silver medal, I see no reason for 5.38 s to/ D: V# N+ h* H# x5 w+ j
be treated as 7 s.
" O3 C" |0 R+ g# V! n
; m0 j3 ^) m) k2 O1 A ASecond, as previously pointed out, Ye is only 16 years old and her body is
# g) S" \) o6 D- h& }still developing. Bettering oneself by 5 seconds over two years may seem% g9 }/ w$ A% q- K& I/ Z) F
impossible for an adult swimmer, but it certainly happens among youngsters.% I3 A6 _" [. j, P3 Y( @
An interview with Australian gold medallist Ian Thorpe revealed that his 400
; Z2 M7 T' L5 m' a-metre freestyle time improved by 5 seconds between the ages of 15 and 16. Q& A5 b0 }' Y3 ]+ x' F8 @# u9 y O
For regular people, including Callaway, it may be hard to imagine what an
) t+ |7 C: k+ b [) B, Qelite swimmer can achieve as he or she matures and undergoes scientific and, ?( z4 t1 l# O) F- T- T2 A
persistent training. But jumping to the conclusion that it is “anomalous”
+ G/ z, {1 }) B* w3 zbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.- A( N0 E) m5 ?% a/ C4 m# w
9 U; f6 G8 ]1 e3 J* iThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
5 t+ d$ i4 w2 L9 `0 u( bexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in1 k1 ^. X' O1 U/ {( Y/ X; Y
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so6 h& c: Q) H, @' U1 g
he chose not to push himself too hard and to conserve his energy for later
# {7 q, G9 v# d# O( s/ aevents (whether this conforms to the Olympic spirit and the ‘use one’s
4 |2 a9 n: @2 l, S5 gbest efforts to win a match’ requirement that the Badminton World
/ ~$ T( d* X* \" S& @Federation recently invoked to disqualify four badminton pairs is another% }; L! [1 B+ P+ X
topic worth discussing, though probably not in Nature). Ye, on the other
0 t- _# u( H ~) f3 R) _3 \$ Bhand, was trailing behind after the first 300 metres and relied on freestyle& G1 b& P4 @1 q0 }- g# l; J
, in which she has an edge, to win the race. Failing to mention this
: [3 [5 M7 p* M& _3 F" Ustrategic difference, as well as the fact that Lochte is 23.25 seconds9 u, m, l* Y8 w" d
faster (4:05.18) than Ye overall, creates the illusion that a woman swam
! u% p. d% Q# I# G9 F* Sfaster than the best man in the same sport, which sounds impossible. Putting# p8 b3 O5 K! k4 `: S ^. S0 ^' v/ r
aside the gender argument, I believe this is still a leading question that7 d% {; u8 s, w
implies to the reader that there is something fishy going on.: E4 |: ?" f. N- a
* b: z8 D+ z, DFourth is another example of cherry-picking. In the same event, there are! j' U8 z7 e W. N! S1 b
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
( @+ k8 G9 k1 k; o. os) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
( T: w7 r4 G6 A- N7 T), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns0 ]& ]# J# Z' p& {; d" |
out, if we are just talking about the last 50 metres in a 400-metre IM,
$ H9 u9 _$ x3 t4 h& J: H* dLochter is not the example I would have used if I were the author. What kind
* C6 F3 L$ S4 Q# n3 q, H8 g8 F$ pof scientific rigorousness is Callaway trying to demonstrate here? Is it6 d: ^$ Y$ Z* G$ R: o( Z; c) ?
logical that if Lochter is the champion, we should assume that he leads in
" e6 f; |- f" ?5 k( N0 O* c$ Z) y* ievery split? That would be a terrible way to teach the public how science
# g) S2 u4 H: {, N8 q: tworks.' Z% {& ?& O/ \: t& E- ^) L) R$ U
' d9 A5 L8 g8 b+ D8 t, @Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and2 i( Q+ }4 s" y- x5 G/ f3 @
implies that a drug test cannot rule out the possibility of doping. Is this2 e k, x: e2 g: m
kind of agnosticism what Nature really wants to teach its readers? By that
$ E+ H% q: m9 ^( r6 V, kstandard, I estimate that at least half of the peer-reviewed scientific; c" y- S6 c# j* r, Z$ g- U" g
papers in Nature should be retracted. How can one convince the editors and
. K0 @# p. N. t/ V' Mreviewers that their proposed theory works for every possible case? One
R W4 ~* C7 u3 E+ y. d" Lcannot. One chooses to apply the theory to typical examples and to
8 ?* v& _& o* `demonstrate that in (hopefully) all scenarios considered, the theory works
2 r0 Z) y) G+ ~to a degree, and that that should warrant publication until a counterexample0 e0 _% P$ y2 K1 J4 e
is found. I could imagine that Callaway has a sceptical mind, which is1 q" ? d/ Q3 a
crucial to scientific thinking, but that would be put to better use if he3 M# _& `- v" } u
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly* U8 h. D6 q1 p
advanced, non-detectable drug that the Chinese have come up with in the
" @8 p1 N: w, k2 r6 B% hpast 4 years (they obviously did not have it in Beijing, otherwise why not, |, k; Z V# d# y) x8 c1 `
use it and woo the audience at home?), based on data and rational derivation! b9 f- F# x( ]+ m$ _
. This article, however, can be interpreted as saying that all athletes are) o' }3 B3 [3 B
doping and the authorities are just not good enough to catch them. That may* i: W8 \. `" c9 r
be true, logically, but definitely will not make the case if there is ever a) j( ~7 j( a; a
hearing by the governing body for water sports, FINA, to determine if Ye
! Z3 i1 S8 i3 W# |& F$ `& }5 Yhas doped. To ask whether it is possible to obtain a false negative in a
, f, E# {1 e O0 [- J) Ldrug test looks like a rigged question to me. Of course it is possible:
. ^' G; P8 n* u' @8 }1 bother than the athlete taking a drug that the test is not designed to detect, |* r* M4 v! x* |0 d
, anyone who has taken quantum 101 will tell you that everything is
# n3 h& q% b1 Z- ]probabilistic in nature, and so there is a probability that the drug in an& u e" A0 v7 k- l/ |0 e3 u
athlete’s system could tunnel out right at the moment of the test. A slight8 C% L9 J3 {$ h$ N) f$ D* t
chance it may be, but should we disregard all test results because of it?7 Y- a6 |, I- o. I& k
Let’s be practical and reasonable, and accept that the World Anti-Doping
- p2 J# [ n5 A. z$ J3 }9 z1 Iagency (WADA) is competent at its job. Ye’s urine sample will be stored for
& r" |2 D: c% X1 o9 u; [/ e( Deight years after the contest for future testing as technology advances.
2 B( [6 C) K5 _: [0 Z2 Y) [Innocent until proven guilty, shouldn’t it be?8 R! a9 D: @ Y: i5 J
- i7 c1 z; { R# hSixth, and the last point I would like to make, is that the out-of-
8 {% Y+ D- e) A0 J- Mcompetition drug test is already in effect, which Callaway failed to mention* T. b, a* q! P) |- R# t
. As noted in the president of WADA’s press release, drug testing for
' B' h9 U8 M9 i5 ]/ X) a7 POlympians began at least six months before the opening of the London
, p, ]! u }& L3 s3 YOlympics. Furthermore, 107 athletes have been banned from this Olympics for# Y! ^! |" ~( \3 w5 z- e& a0 T
doping. That may be the reason that “everyone will pass at the Olympic# M/ A g1 o0 `8 G/ c* \
games. Hardly anyone fails in competition testing” — those who did dope
4 P2 |8 o: i* H* _8 w$ whave already been caught and sanctioned. Callaway is free to suggest that a
, N# G1 x. ?" I. o4 y8 Aplayer could have doped beforehand and fooled the test at the game, but this8 _* b8 e! U# t! _0 t& \
possibility is certainly ruled out for Ye.
, b e1 Z+ }* J2 Z1 j) @- }8 x0 R1 O$ `! `3 i8 ^7 ~' a
Over all, even though Callaway did not falsify any data, he did (9 T* E& E- u) j1 @2 g# I8 N% D
intentionally or not) cherry-pick data that, in my view, are far too: F8 L2 ?$ K, V4 W7 K8 O
suggestive to be fair and unbiased. If you want to cover a story of a
7 \( u, h# f6 @1 u. dsuspected doping from a scientific point of view, be impartial and provide
( m- u4 ]2 t ball the facts for the reader to judge. You are entitled to your4 e* B9 Q4 n( D8 ?5 }
interpretation of the facts, and the expression thereof in your piece,4 G! Q, K! Z1 C! `3 f3 Y
explicitly or otherwise, but showing only evidence that favours your1 M1 J9 p7 |% N p7 Q3 v
argument is hardly good science or journalism. Such an article in a journal/ x5 M/ F2 X1 g8 F
such as Nature is not an appropriate example of how scientific research or
8 f& X2 q% y* f& |! Q( t, {$ Preporting should be done. |
|