 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
+ Z2 g( [% W6 a6 c如果是中国长大的,英语能到这种程度真是很不简单。" U$ S0 ^" C! p6 { h% u
5 [ e5 ^: c7 r$ Ehttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html# k) W" B7 M e5 L. o0 t
3 P1 s- _- k0 qFROM LAI JIANG, Department of Chemistry, University of Pennsylvania
* U8 P- F7 c0 H1 I
( t1 h T" h% u7 ?It is a shame to see Nature — which nearly all scientists, including myself9 o. g3 }3 x. X2 v
, regard as one of the most prestigious and influential physical-science
% W0 }% o1 V5 h! N. b/ F; m% emagazines — publish a thinly veiled biased article like this. Granted, this( q" L6 M* x% v
is not a peer-reviewed scientific article and did not go through the0 _, x) w! u9 ~1 N, G* s3 G6 V) P e
scrutiny of picking referees. But to serve as a channel for the general
$ @, |+ s" s# q, g+ X$ C- epopulace to be in touch with and appreciate science, the authors and editors+ x8 L0 T- l m$ t9 \/ g* _" S
should at least present the readers with facts within the proper context,
, Z4 S- f% p& ~* I& \which they blatantly failed to do.- K, D+ [: X* p. W
" J, B' }$ e R- bFirst, to identify Ye’s performance increase, Ewen Callaway compared her* f! a$ x+ o l& r" T: c6 s# e
Olympic 400-metre IM time with her performance at the World Championships in4 u4 }2 k& x7 I- _+ R6 J2 y1 d: T
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “( O9 s. i+ w0 X
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous' x4 z8 q0 j7 b
personal best was 4:33.79 at the Asian Games in 2010. This leads to an; Z! L; C. j, i1 X. e2 A* f5 u/ k+ F/ T
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the! p; ^ D3 I' Y( u* X5 Q' W- `
difference between the gold and silver medal, I see no reason for 5.38 s to- X" {# r) z+ p c+ ~& z
be treated as 7 s.: p, ?5 | l- e9 L8 m
7 [; M5 U6 e+ BSecond, as previously pointed out, Ye is only 16 years old and her body is
. ^- q! a7 e5 \8 Pstill developing. Bettering oneself by 5 seconds over two years may seem
3 p# [7 K% l. e+ Z. L( nimpossible for an adult swimmer, but it certainly happens among youngsters.
_7 R/ y* Y) b! l8 v) r# XAn interview with Australian gold medallist Ian Thorpe revealed that his 400
) U. T; p& H7 K" C- g# G% W A-metre freestyle time improved by 5 seconds between the ages of 15 and 16.% v, L1 F4 l, V4 L; w
For regular people, including Callaway, it may be hard to imagine what an5 _! Q$ f( a8 _( x6 z
elite swimmer can achieve as he or she matures and undergoes scientific and' ^$ t, c! v3 p( ^% [8 b
persistent training. But jumping to the conclusion that it is “anomalous”( q3 j* ^# d$ Q) o2 t$ \5 N
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.& V# Y: [9 f+ F; T4 j" K$ z
9 O9 f3 o2 O9 ]4 U6 P3 ^Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
1 T- i( f9 c! E. @9 J; }example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in% o F: x& ]0 F* b# o
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so( c/ I$ y- E1 y* Q. \( a2 q
he chose not to push himself too hard and to conserve his energy for later
7 f; f/ ]. Q( B1 o. b$ A ?& nevents (whether this conforms to the Olympic spirit and the ‘use one’s8 y# S6 g( U7 ?& i3 D& V" _" q; v$ v
best efforts to win a match’ requirement that the Badminton World
- A$ T. f3 t# z# _+ l; v' sFederation recently invoked to disqualify four badminton pairs is another9 I% D) l) \6 b3 `0 g
topic worth discussing, though probably not in Nature). Ye, on the other5 o7 r3 u, \! U8 w" q9 h
hand, was trailing behind after the first 300 metres and relied on freestyle- d( h4 y2 F, H
, in which she has an edge, to win the race. Failing to mention this5 |# Y( y0 k( x8 K
strategic difference, as well as the fact that Lochte is 23.25 seconds
3 @( ^6 ]. T9 _: U' ]faster (4:05.18) than Ye overall, creates the illusion that a woman swam: S6 r' F( x' W7 u' G2 X, \0 D
faster than the best man in the same sport, which sounds impossible. Putting
5 C( v: i& Y9 @( B% K: [: r" Taside the gender argument, I believe this is still a leading question that6 l+ S% Z6 Q8 [0 @! a
implies to the reader that there is something fishy going on.. K/ d( C9 B1 P+ E# b6 k8 {
9 N5 u) u5 i- u- a9 X
Fourth is another example of cherry-picking. In the same event, there are
7 o- w- p4 ]7 K x- Rfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
* u7 s/ v) R: n2 t6 \s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s: ]- l; b# x+ S2 Z; i i' z1 J$ _
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
9 B7 i; @9 K' D8 B# z: ~+ Pout, if we are just talking about the last 50 metres in a 400-metre IM,
4 I& S. J" ?6 ]1 ?Lochter is not the example I would have used if I were the author. What kind
. l4 O$ K2 [/ Z7 oof scientific rigorousness is Callaway trying to demonstrate here? Is it2 t8 }3 L/ G9 D6 Y3 [' _: U6 M; m w
logical that if Lochter is the champion, we should assume that he leads in
l9 q! c5 E4 o# ^7 [8 r; o2 Severy split? That would be a terrible way to teach the public how science; ]4 c/ J$ E$ h
works.
$ s& m0 f, _" R7 _- M. L
, X( Q/ N1 ]0 MFifth is the issue I oppose the most. Callaway quotes Ross Tucker and
9 z' U1 e3 z x r- k+ himplies that a drug test cannot rule out the possibility of doping. Is this
' l$ {4 N- F, n+ P, w2 F4 skind of agnosticism what Nature really wants to teach its readers? By that
7 z+ e& H& Y' i, R- q0 Rstandard, I estimate that at least half of the peer-reviewed scientific
& e- R, F; c6 ^6 F5 dpapers in Nature should be retracted. How can one convince the editors and( j! x2 ]: k B- s4 R* t8 ?
reviewers that their proposed theory works for every possible case? One; H0 s6 w3 P6 V# i2 Z0 n8 ?
cannot. One chooses to apply the theory to typical examples and to
) L/ {5 ~* B0 f7 u+ V( udemonstrate that in (hopefully) all scenarios considered, the theory works' |7 F; a6 } U/ h& |
to a degree, and that that should warrant publication until a counterexample0 M5 d4 O0 M6 z- J4 R' z/ r
is found. I could imagine that Callaway has a sceptical mind, which is
, M# w; J8 }) n( p( h2 n3 Hcrucial to scientific thinking, but that would be put to better use if he$ o2 J+ N, p* H3 Y9 |
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
8 o. c/ {3 m* Q" x5 X9 G8 Tadvanced, non-detectable drug that the Chinese have come up with in the3 u2 L% x. d9 Q1 W, e5 B: e& v+ d
past 4 years (they obviously did not have it in Beijing, otherwise why not( n6 \ h7 n( N' @4 r+ @
use it and woo the audience at home?), based on data and rational derivation0 Z; Y% ]+ `. a2 U) B! _
. This article, however, can be interpreted as saying that all athletes are) M4 H' O# k5 D8 x) V* \5 r# G
doping and the authorities are just not good enough to catch them. That may- b$ E' b c9 s0 s
be true, logically, but definitely will not make the case if there is ever a: Z2 I* B$ I' J$ S5 i
hearing by the governing body for water sports, FINA, to determine if Ye
, q ]4 B$ R- w' n+ c7 Shas doped. To ask whether it is possible to obtain a false negative in a0 G8 Q! e/ V1 A" z. H6 K
drug test looks like a rigged question to me. Of course it is possible:
% L8 u0 m- C# l% N* G& V8 iother than the athlete taking a drug that the test is not designed to detect; M. O5 Z9 f, Y1 ]) b0 w
, anyone who has taken quantum 101 will tell you that everything is r7 ?$ {1 |+ p! N" v' O8 o* @
probabilistic in nature, and so there is a probability that the drug in an
: K7 J' j; S4 K4 h# c! dathlete’s system could tunnel out right at the moment of the test. A slight
1 Y; A. g2 T' E3 W9 q" c% m( Kchance it may be, but should we disregard all test results because of it?0 c% p8 A* N V: h1 b) \# n5 x
Let’s be practical and reasonable, and accept that the World Anti-Doping/ L: t6 C& ?2 o1 [5 Y
agency (WADA) is competent at its job. Ye’s urine sample will be stored for
( m7 |! d. e" W* s# b" R/ V0 Height years after the contest for future testing as technology advances.
0 ]( z9 B. r7 p1 W0 E( W4 ^Innocent until proven guilty, shouldn’t it be?
, _& {& T7 A1 @8 X3 e4 N) X3 Y7 i7 p: M
Sixth, and the last point I would like to make, is that the out-of-
6 W# _4 E9 C# t5 mcompetition drug test is already in effect, which Callaway failed to mention
1 Z+ _+ ], Y. w. As noted in the president of WADA’s press release, drug testing for1 b7 E4 V% B. R5 J3 S% s- x
Olympians began at least six months before the opening of the London, ^. t T0 E" s. ], V' Z) u5 [
Olympics. Furthermore, 107 athletes have been banned from this Olympics for
! \3 v p8 R& v2 K& S8 S/ n: Ldoping. That may be the reason that “everyone will pass at the Olympic
( J4 G# ]5 A0 v. ^games. Hardly anyone fails in competition testing” — those who did dope
% U7 n' i- h; K) c* I$ hhave already been caught and sanctioned. Callaway is free to suggest that a5 A. o# m1 F8 E! }8 l
player could have doped beforehand and fooled the test at the game, but this6 ^5 Y, ?/ |) b" O1 k+ B2 w
possibility is certainly ruled out for Ye.
, R9 b+ ?- d' y, a7 b& |2 v7 O( O, u# r' q
Over all, even though Callaway did not falsify any data, he did (
( o: I% z' E9 M0 p7 f: N! ~& b" Rintentionally or not) cherry-pick data that, in my view, are far too9 T7 Y+ u9 l5 y" v ]; ~
suggestive to be fair and unbiased. If you want to cover a story of a
4 X5 }5 [ A& i2 @3 d ]suspected doping from a scientific point of view, be impartial and provide ?. d# y% X' a" Z+ E) N
all the facts for the reader to judge. You are entitled to your
, z$ ^4 }: K' ^& jinterpretation of the facts, and the expression thereof in your piece,+ Z; O8 s/ \- S; y, M) L
explicitly or otherwise, but showing only evidence that favours your0 U" u$ _$ a+ C/ r
argument is hardly good science or journalism. Such an article in a journal
) w$ Z. N/ `0 l! g$ L' @such as Nature is not an appropriate example of how scientific research or9 X6 k* i: N, ]4 D( ^& H( F! u
reporting should be done. |
|