 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# J- z, j4 i8 L
如果是中国长大的,英语能到这种程度真是很不简单。
7 Q. e: y4 S2 Y$ s3 _ }1 y6 {5 H( }% W
http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html n. l0 [! H+ v [: U; D8 v
% U+ `8 B3 M/ h, J* t1 qFROM LAI JIANG, Department of Chemistry, University of Pennsylvania, p3 R) Y$ E" q# i! P9 |- l5 L
6 Y/ H) @! W- ]2 _6 UIt is a shame to see Nature — which nearly all scientists, including myself
% E! i5 @" ]% S# P0 |, regard as one of the most prestigious and influential physical-science
- F& R: R( }. n# Y- _0 Tmagazines — publish a thinly veiled biased article like this. Granted, this
: J/ v D( @2 d0 dis not a peer-reviewed scientific article and did not go through the; W$ R8 ` _; n" j' D
scrutiny of picking referees. But to serve as a channel for the general. ?) i- J/ e, ~& Q" c6 @; b
populace to be in touch with and appreciate science, the authors and editors1 h2 e6 k* Z$ p! H: U
should at least present the readers with facts within the proper context,: v4 n, q/ y9 t1 {
which they blatantly failed to do.6 J) `2 S! w! |# S- H$ U" P) i3 {
" P0 |, ?1 s7 }* q5 O$ WFirst, to identify Ye’s performance increase, Ewen Callaway compared her1 Z0 q9 X) l* `" J
Olympic 400-metre IM time with her performance at the World Championships in
8 z. N9 Q6 u( ^7 C& t }2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “% {5 t8 R# B1 y
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous% q# i2 m/ f# }" j* K: P3 J" F. n+ {
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
% X% j, S+ K. t, Yimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the3 W8 o8 p4 ^4 f
difference between the gold and silver medal, I see no reason for 5.38 s to
8 ?; n# d2 t8 I6 s& T( g/ Xbe treated as 7 s.9 L- a& j7 g+ E9 j# g1 v
: p( W$ ?. s: Z0 k
Second, as previously pointed out, Ye is only 16 years old and her body is
( c. g( s9 @9 j! S! t5 F8 x/ V9 @still developing. Bettering oneself by 5 seconds over two years may seem
& F$ u7 z$ G5 K" p/ a+ v& Aimpossible for an adult swimmer, but it certainly happens among youngsters.
8 H) e! R9 Y9 v: R, a9 a+ G& EAn interview with Australian gold medallist Ian Thorpe revealed that his 4001 l3 V. R% d. P- g" w
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
& K- B% ~6 E @; L5 H9 P/ eFor regular people, including Callaway, it may be hard to imagine what an
9 V( L3 {. {" E0 Y% y' q7 Kelite swimmer can achieve as he or she matures and undergoes scientific and5 a6 L9 v7 W/ ^5 V
persistent training. But jumping to the conclusion that it is “anomalous”
' f% ]3 y! s% _7 B; C; w. kbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.$ W- ]! G7 Q( B
* V% L0 t' ]& ~4 B: C9 D# g- m
Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
7 d3 y! k$ g; zexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
$ Q3 ^+ X" [( U* X5 t/ Y/ Q+ `the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
* b: H/ L: w$ O, H: {he chose not to push himself too hard and to conserve his energy for later' M/ ?9 I) A0 g
events (whether this conforms to the Olympic spirit and the ‘use one’s
4 r/ E+ Q, a' l" z3 F1 o+ {best efforts to win a match’ requirement that the Badminton World: E; \9 A/ V8 V$ x
Federation recently invoked to disqualify four badminton pairs is another
" a) H3 v, J: T9 L$ Ntopic worth discussing, though probably not in Nature). Ye, on the other5 Y% N* L: i# ]4 [
hand, was trailing behind after the first 300 metres and relied on freestyle. u7 |; E7 l2 {( T
, in which she has an edge, to win the race. Failing to mention this2 m3 a4 ?$ j& d7 F2 W2 O9 o
strategic difference, as well as the fact that Lochte is 23.25 seconds( t7 Y& z7 F$ [; C9 R
faster (4:05.18) than Ye overall, creates the illusion that a woman swam
. Y" S% M9 Z* |6 _ f' [1 O3 c7 E. Cfaster than the best man in the same sport, which sounds impossible. Putting
- l* t- `; T4 e3 {4 N- i6 easide the gender argument, I believe this is still a leading question that3 Y; t2 \5 g5 ?) Y. `
implies to the reader that there is something fishy going on.
/ s3 [: F# s6 L( Q% R3 p3 Z* D; c
6 |, v$ u1 M2 M- M+ F* |( TFourth is another example of cherry-picking. In the same event, there are
. o3 ]2 {! |! o; |* t5 I' u/ Rfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93) ?) O5 q" c- Z8 T# F( g
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
! O/ @ k3 S+ l; j9 F/ ~) a), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
# m% s' B8 z% d! Uout, if we are just talking about the last 50 metres in a 400-metre IM,
+ H* Q' u0 ^; f* v* hLochter is not the example I would have used if I were the author. What kind3 y& _: J0 n. h8 R$ a8 C. b
of scientific rigorousness is Callaway trying to demonstrate here? Is it
5 ?5 R# G9 q1 R( Plogical that if Lochter is the champion, we should assume that he leads in
5 t# g# C! ?$ w& X( y+ gevery split? That would be a terrible way to teach the public how science
& W* W4 G, x2 t* F+ a3 M _& A2 cworks.
3 ] ]6 v% _# I( ]- \& ~+ B' e& y& @4 l/ Y5 M
Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and( w6 Q' B. v9 J, K' @
implies that a drug test cannot rule out the possibility of doping. Is this
! o. \% {& r. u9 ^) Q Ikind of agnosticism what Nature really wants to teach its readers? By that" m5 c' z; p0 G5 }6 [: `
standard, I estimate that at least half of the peer-reviewed scientific: o: ~# |2 Q: q/ }) G
papers in Nature should be retracted. How can one convince the editors and
+ O/ @7 w1 G8 `- Treviewers that their proposed theory works for every possible case? One& k! P$ q% t i# @. {
cannot. One chooses to apply the theory to typical examples and to6 v) @/ S: q7 i. T) O: P
demonstrate that in (hopefully) all scenarios considered, the theory works% u, F. ]8 R- `/ r7 b
to a degree, and that that should warrant publication until a counterexample0 t" o6 N. T, [1 p* |
is found. I could imagine that Callaway has a sceptical mind, which is
' ~: R2 ^6 P" |' l3 n3 C3 ]crucial to scientific thinking, but that would be put to better use if he# f( F0 c0 w0 ]- j
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly* W0 r" x& d+ F# I* k
advanced, non-detectable drug that the Chinese have come up with in the p6 r( ^/ m5 u! M
past 4 years (they obviously did not have it in Beijing, otherwise why not
" C# I! l4 k* iuse it and woo the audience at home?), based on data and rational derivation& f% n5 S X* n8 ^- g
. This article, however, can be interpreted as saying that all athletes are/ R V3 y/ s% L0 Q. c4 j
doping and the authorities are just not good enough to catch them. That may
- d4 K. E4 o; o/ n+ Nbe true, logically, but definitely will not make the case if there is ever a
, k2 l( |3 a7 m6 Shearing by the governing body for water sports, FINA, to determine if Ye
) o- f {$ F( b% A& b3 I; ?has doped. To ask whether it is possible to obtain a false negative in a" g) w! W; L3 |1 s
drug test looks like a rigged question to me. Of course it is possible:
+ @' K \' {% J: Q7 Uother than the athlete taking a drug that the test is not designed to detect
, j3 a% n. Z1 R3 g" X! F# w0 f, anyone who has taken quantum 101 will tell you that everything is
, F0 R; ^+ x+ R, G& ~( P( b1 T8 {/ rprobabilistic in nature, and so there is a probability that the drug in an( g2 T6 P$ C3 F& y% F* i
athlete’s system could tunnel out right at the moment of the test. A slight
# M" Z6 [2 h5 c0 Pchance it may be, but should we disregard all test results because of it?' k" B- q- c- e6 S5 V
Let’s be practical and reasonable, and accept that the World Anti-Doping- k! K- Z2 }: a6 [2 x4 E$ r
agency (WADA) is competent at its job. Ye’s urine sample will be stored for
$ \ }$ c; l e* a* W/ L) i0 aeight years after the contest for future testing as technology advances.$ R' w# U$ c0 k! X1 v
Innocent until proven guilty, shouldn’t it be?$ Y9 Z' o% K3 f: q9 g
- y3 c; B5 N$ s- n/ K( [Sixth, and the last point I would like to make, is that the out-of-" }9 e; e9 w4 l/ \& h
competition drug test is already in effect, which Callaway failed to mention( Q$ E; ]8 ?+ l/ d+ u/ s
. As noted in the president of WADA’s press release, drug testing for( i" J, L( u4 M$ I
Olympians began at least six months before the opening of the London
- a7 F- h; K5 q0 p% iOlympics. Furthermore, 107 athletes have been banned from this Olympics for
9 H5 T) J; ~5 H. w. ~doping. That may be the reason that “everyone will pass at the Olympic
4 v9 i- h$ {3 I" l& P1 Tgames. Hardly anyone fails in competition testing” — those who did dope) x8 i3 U9 c: g4 h+ O
have already been caught and sanctioned. Callaway is free to suggest that a
4 l7 t; n5 z4 K( c, cplayer could have doped beforehand and fooled the test at the game, but this, Z& o, z# z: O l; j1 [' F9 S
possibility is certainly ruled out for Ye.
~- g" Z/ I/ a8 T( F% P5 y/ Q! R% b3 A6 O* n* c- ~2 x# G9 E
Over all, even though Callaway did not falsify any data, he did (
" o7 q: `' ]& E3 G1 Jintentionally or not) cherry-pick data that, in my view, are far too0 }% `+ I* O Z* e' X
suggestive to be fair and unbiased. If you want to cover a story of a
8 O: [" H, g+ Z" _2 K) v2 xsuspected doping from a scientific point of view, be impartial and provide9 Y- `; _8 r' x8 P* Y, Z2 h
all the facts for the reader to judge. You are entitled to your D- s4 `0 b1 Y3 y6 M- Y+ F
interpretation of the facts, and the expression thereof in your piece,: J. [; K1 i' ~3 Z" ~8 M0 x3 x
explicitly or otherwise, but showing only evidence that favours your
w# V. G, G" U# }# M" k3 M, Yargument is hardly good science or journalism. Such an article in a journal
. ^# u7 s6 u$ k9 Fsuch as Nature is not an appropriate example of how scientific research or& v1 c, m6 h4 u) z I
reporting should be done. |
|