 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
( o; B& X: M: G: i4 ]& K如果是中国长大的,英语能到这种程度真是很不简单。, z F* F2 P6 o. W0 \* Z
! g& l- ?( v3 m& dhttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html! f( d5 t7 Z; `' f/ [% l! i2 `
4 ?) t- Q, ^" V' A
FROM LAI JIANG, Department of Chemistry, University of Pennsylvania0 T/ n6 q( `- R2 e* k. o
( O7 u. z) _: ~7 l; ^' [
It is a shame to see Nature — which nearly all scientists, including myself
6 A% s6 I0 V; B* C3 m, regard as one of the most prestigious and influential physical-science, ]: R7 \4 j5 V% |
magazines — publish a thinly veiled biased article like this. Granted, this
/ G C1 W1 n, ?3 ais not a peer-reviewed scientific article and did not go through the8 l8 s! ]. z/ H' F1 ]* p
scrutiny of picking referees. But to serve as a channel for the general K, ~" `% O- p( S
populace to be in touch with and appreciate science, the authors and editors& `5 _9 U# [2 q
should at least present the readers with facts within the proper context,2 Z# @, }5 s ^ e h
which they blatantly failed to do.2 w4 w; Q8 V- w. Z0 Q
9 m$ n4 r6 y4 Q- C" q0 r1 aFirst, to identify Ye’s performance increase, Ewen Callaway compared her4 \9 X: ]( S1 M O& I% {
Olympic 400-metre IM time with her performance at the World Championships in
7 p# |/ a! x: c8 X2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
$ ~/ Z/ j' F8 T. x. banomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
. Z- s3 Z Q8 h5 \personal best was 4:33.79 at the Asian Games in 2010. This leads to an) b z( u/ e) q% G) l
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the) ?7 J7 V& a( P/ h5 P$ z* ^9 m
difference between the gold and silver medal, I see no reason for 5.38 s to% v0 F' X5 J; p. i, t- j& H
be treated as 7 s.
: Z) [) W3 ]6 t& g- i' y
g7 @5 @4 X- k# e# z; j" G, nSecond, as previously pointed out, Ye is only 16 years old and her body is
; \+ A; L; P8 n; \still developing. Bettering oneself by 5 seconds over two years may seem' z- [& f% w, }3 V3 T2 G2 U: ^
impossible for an adult swimmer, but it certainly happens among youngsters.
& G+ W% R. S6 I# OAn interview with Australian gold medallist Ian Thorpe revealed that his 4001 v Z6 |/ ]1 Z/ W6 k G
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.1 ~7 r. |& M, f/ n
For regular people, including Callaway, it may be hard to imagine what an
# G. W `% {! B {! s. W+ @, x& nelite swimmer can achieve as he or she matures and undergoes scientific and
6 [" _6 f1 [/ \$ Z2 C/ ]* ^persistent training. But jumping to the conclusion that it is “anomalous”" X: E g# R5 E: H$ w
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
o8 P6 ?' A7 {5 o. ?0 r$ a' u& _9 I- I" V! J J
Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
" K3 F* ^% v8 S1 O8 A3 L2 K- e, yexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in* U2 W0 T& ]+ Z- h1 j0 L
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so, ?2 A0 P' |. t6 Z% }. A
he chose not to push himself too hard and to conserve his energy for later
; A( G& T8 t: `* Wevents (whether this conforms to the Olympic spirit and the ‘use one’s
& J1 W0 u3 p% W/ t5 Ibest efforts to win a match’ requirement that the Badminton World- ^+ k$ I& h6 k; R
Federation recently invoked to disqualify four badminton pairs is another
2 ?2 A2 s' Q. g# r$ p1 ktopic worth discussing, though probably not in Nature). Ye, on the other
8 g5 J& m5 s7 _hand, was trailing behind after the first 300 metres and relied on freestyle) ^9 f- L6 N3 q7 Q) r
, in which she has an edge, to win the race. Failing to mention this
8 P3 n" o+ f, g3 M& q3 Pstrategic difference, as well as the fact that Lochte is 23.25 seconds
) _* {0 Y7 y \+ x' D4 rfaster (4:05.18) than Ye overall, creates the illusion that a woman swam" X1 h8 w& k1 b- i9 K+ {
faster than the best man in the same sport, which sounds impossible. Putting2 g( ]. m# y7 n0 P# @2 b u
aside the gender argument, I believe this is still a leading question that% t8 o" e/ c0 b0 m5 @8 _3 A5 l& X
implies to the reader that there is something fishy going on.
# B$ _7 P6 p, B" [& Y! W1 V1 X& \& y1 |( g- L$ N3 m
Fourth is another example of cherry-picking. In the same event, there are+ l5 u% a9 ?3 M& l( ]# s: V8 p! G
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93% H, G1 S+ W1 M( r5 }1 u& E
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
9 f7 j3 e7 ~( g8 q7 V), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
+ R5 b$ e7 W3 Q- T' Wout, if we are just talking about the last 50 metres in a 400-metre IM,/ X/ X$ I1 h& W5 b* e7 h
Lochter is not the example I would have used if I were the author. What kind" V% J. Q5 s- j! N4 h$ w3 j! P7 T
of scientific rigorousness is Callaway trying to demonstrate here? Is it
0 L: ?, l. m6 ~* h' T0 O: ?) H+ Vlogical that if Lochter is the champion, we should assume that he leads in0 K! K f0 y$ v9 O' b
every split? That would be a terrible way to teach the public how science
( B9 z) U$ d# v5 E( d& Y* Yworks.+ P& U- ?3 L3 {2 Z; b" g6 \
7 z. ]/ r! n# B, }# t- s8 AFifth is the issue I oppose the most. Callaway quotes Ross Tucker and: @: ?# R0 \" E5 W& i8 P
implies that a drug test cannot rule out the possibility of doping. Is this
; }0 c/ l" | D5 |+ ^kind of agnosticism what Nature really wants to teach its readers? By that
0 o& @0 `; ]$ I! m* k( |4 rstandard, I estimate that at least half of the peer-reviewed scientific
6 F! a' Y2 I" }5 G3 qpapers in Nature should be retracted. How can one convince the editors and$ L+ g4 E2 E$ l7 |" e' s3 ?
reviewers that their proposed theory works for every possible case? One
6 l$ S, B W# G6 G g/ g' L) p$ Scannot. One chooses to apply the theory to typical examples and to$ [, @( W p. i- R& M
demonstrate that in (hopefully) all scenarios considered, the theory works1 e0 B( b; @( y; O
to a degree, and that that should warrant publication until a counterexample& W. U- Y+ h* d5 g6 V, [' g& w% `
is found. I could imagine that Callaway has a sceptical mind, which is6 Y, G* q: I0 D) P) M9 m
crucial to scientific thinking, but that would be put to better use if he
3 K: ?' M" D. S% \" zwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
- X- \1 t8 O. i6 q- b! s2 u! Tadvanced, non-detectable drug that the Chinese have come up with in the+ t9 T P4 U. r$ ]& P
past 4 years (they obviously did not have it in Beijing, otherwise why not
* O1 |; J- h& k0 o( euse it and woo the audience at home?), based on data and rational derivation
8 h" L1 ^: v2 J. W- l1 Y. This article, however, can be interpreted as saying that all athletes are
; y& V3 p) y( u. i; k: }8 Odoping and the authorities are just not good enough to catch them. That may
) v! s# G8 E/ V1 |( y, Tbe true, logically, but definitely will not make the case if there is ever a" s8 g! i$ S: ]! F
hearing by the governing body for water sports, FINA, to determine if Ye
) r/ z+ y7 J: n2 k! ?7 T1 T5 d4 xhas doped. To ask whether it is possible to obtain a false negative in a! \! c4 D! t. r
drug test looks like a rigged question to me. Of course it is possible:. o, N$ V( m6 s7 {
other than the athlete taking a drug that the test is not designed to detect/ A/ G j/ A. A& S. l7 J% D5 ?. c+ {5 P. y
, anyone who has taken quantum 101 will tell you that everything is O( U0 G" ^7 w& v% r# @; A8 l3 Y
probabilistic in nature, and so there is a probability that the drug in an
$ z' F0 |8 E9 O' p! Cathlete’s system could tunnel out right at the moment of the test. A slight5 F6 R3 G) D: a+ d
chance it may be, but should we disregard all test results because of it?
: e) A7 \0 C" i# \" O9 i. |Let’s be practical and reasonable, and accept that the World Anti-Doping
# `% `6 \. [- |2 w/ f; i% ^agency (WADA) is competent at its job. Ye’s urine sample will be stored for5 g% l. F" _3 Y8 }; ~
eight years after the contest for future testing as technology advances.
' `" f: `5 h& Z' T/ ~Innocent until proven guilty, shouldn’t it be?
- T8 }) P9 w7 W" T7 D3 F7 K/ D7 m X: m$ j7 F( |0 P' d5 N
Sixth, and the last point I would like to make, is that the out-of-+ Q* J7 L# ~0 g; a z. P' A) l% p
competition drug test is already in effect, which Callaway failed to mention+ v% `! ~9 E+ z, f k
. As noted in the president of WADA’s press release, drug testing for
- a7 c3 M' Y, _, J* R/ ]Olympians began at least six months before the opening of the London' l- }8 S3 N, o+ c' E9 p
Olympics. Furthermore, 107 athletes have been banned from this Olympics for
+ L7 \8 i+ S/ m5 sdoping. That may be the reason that “everyone will pass at the Olympic8 v2 Y$ \2 X5 {/ R6 X
games. Hardly anyone fails in competition testing” — those who did dope
( T) n) `! y1 W: Mhave already been caught and sanctioned. Callaway is free to suggest that a' q3 |. P, I$ f+ V" D" n* S8 m
player could have doped beforehand and fooled the test at the game, but this
& Q: B, e: l% Y7 z% qpossibility is certainly ruled out for Ye.4 `! C: x" h0 F8 t3 u/ T5 Y( Q/ L
0 E" x) f$ X0 c2 j) s" }( BOver all, even though Callaway did not falsify any data, he did (: j d. Z- M6 ^8 U% V4 c
intentionally or not) cherry-pick data that, in my view, are far too4 V% l* f8 S; O9 C) s
suggestive to be fair and unbiased. If you want to cover a story of a6 B/ m. O" d5 Z4 y: i
suspected doping from a scientific point of view, be impartial and provide
' D" }8 k: l; B0 W" g( p/ pall the facts for the reader to judge. You are entitled to your w A' X$ z. P& i
interpretation of the facts, and the expression thereof in your piece,
3 _6 |- Z o8 B% F8 s" V# o/ bexplicitly or otherwise, but showing only evidence that favours your
) G& l" g% E! \) i# X2 [argument is hardly good science or journalism. Such an article in a journal
# ^3 P" Q2 x$ Q' L; ^such as Nature is not an appropriate example of how scientific research or: M7 R' O, h2 J: D q
reporting should be done. |
|