 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
' X. I/ e: w# a) G% H如果是中国长大的,英语能到这种程度真是很不简单。
9 A+ r- t& u' Q0 |2 z+ S: [- S8 N T3 g& p/ v* c
http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html. k% k) J6 n8 N+ d' G" W" L
1 }+ {, t& u" ZFROM LAI JIANG, Department of Chemistry, University of Pennsylvania$ X5 X# ]# F( P" d- n# }
& l) L3 i( f4 V' w% QIt is a shame to see Nature — which nearly all scientists, including myself
$ l2 ^$ s7 Z0 a, regard as one of the most prestigious and influential physical-science
d# E) C1 B- x, ]9 H# Ymagazines — publish a thinly veiled biased article like this. Granted, this
) B3 W1 O: s7 Nis not a peer-reviewed scientific article and did not go through the) N+ S! Q7 f: E& S5 V1 ]4 `
scrutiny of picking referees. But to serve as a channel for the general/ x3 ^9 j. Y% q; n$ J2 A, f
populace to be in touch with and appreciate science, the authors and editors0 H! E3 K, P- ]" r& S
should at least present the readers with facts within the proper context,
& g2 q3 x% M3 r8 Q1 f4 ewhich they blatantly failed to do.
3 h4 u# ~0 l) x" v4 ~2 h
8 C e2 y; m! g7 K1 |" B. UFirst, to identify Ye’s performance increase, Ewen Callaway compared her5 v( L6 R8 {2 I4 s' ~ \
Olympic 400-metre IM time with her performance at the World Championships in
/ o# A1 |- t9 @ g W" q% y: |* d6 @. v2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
% e, |2 Y9 r' A9 D% j, P: {" Danomalous” improvement of around 7 seconds (6.72 s). In fact, her previous7 A! V* d& Q. O) F) Z
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
% G& S, Y9 |1 | bimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the
+ Q& x/ f1 U& F% m$ fdifference between the gold and silver medal, I see no reason for 5.38 s to: K: C- l, U' {8 z3 S- D
be treated as 7 s.$ w, b& {( g7 J% W/ r* L" z
/ X6 O$ z! w8 u4 X; X; fSecond, as previously pointed out, Ye is only 16 years old and her body is9 t9 T' O' n" E& J
still developing. Bettering oneself by 5 seconds over two years may seem
: w: n# v O) E1 S+ g- S* s5 |, Fimpossible for an adult swimmer, but it certainly happens among youngsters.1 t" \- C$ [9 h- N7 Q: i* P
An interview with Australian gold medallist Ian Thorpe revealed that his 4001 x3 C* m' _9 z
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
1 w# ]# c4 u9 k8 X6 e# j# A) GFor regular people, including Callaway, it may be hard to imagine what an, L) l7 V/ c/ K/ {3 w
elite swimmer can achieve as he or she matures and undergoes scientific and
M# h4 k |7 m% vpersistent training. But jumping to the conclusion that it is “anomalous”, ]8 c' C5 t; [0 i v
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.3 I7 b/ q# @' l. p* g% n; U f @
G3 g8 B( B/ b; h' g& ^( Y0 fThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook/ J9 h$ E) J1 b3 g |$ a* R4 ~
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in$ d2 J- h% a! l- L
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
/ R$ q) ]& D9 m, y: \he chose not to push himself too hard and to conserve his energy for later
5 U" G7 I# V6 C. k7 t4 u. Mevents (whether this conforms to the Olympic spirit and the ‘use one’s
- G( Z' M6 m2 g% ~2 x6 w5 zbest efforts to win a match’ requirement that the Badminton World
1 c$ {' A: q# bFederation recently invoked to disqualify four badminton pairs is another
: M5 @* |8 I h- O8 E5 Xtopic worth discussing, though probably not in Nature). Ye, on the other
9 w4 G8 m) Z! m j( `! H5 [hand, was trailing behind after the first 300 metres and relied on freestyle) d* S+ ^4 ~1 m, Z
, in which she has an edge, to win the race. Failing to mention this
9 P5 ]$ w9 S! T! S8 X4 c" e C" Zstrategic difference, as well as the fact that Lochte is 23.25 seconds: b+ Q6 d" O7 m+ f; D: x9 ?4 e: @" n
faster (4:05.18) than Ye overall, creates the illusion that a woman swam9 \* N& b* N1 z8 z! |9 x
faster than the best man in the same sport, which sounds impossible. Putting6 c7 Q, s, s0 M5 s& s1 W6 j+ N5 j
aside the gender argument, I believe this is still a leading question that1 ]2 r; p3 [+ V; ~- ?0 \; r
implies to the reader that there is something fishy going on.
" ?: J* Q% K: x7 w
6 ^- s* }7 m5 G1 W& p2 A" rFourth is another example of cherry-picking. In the same event, there are
@& t9 H" V4 D: K6 Ofour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
; a# x$ L( n6 N$ Os) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s. m8 A( x0 T2 a( t6 s, O- _5 e
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns0 H. q7 ?! Z. e9 M) P; w
out, if we are just talking about the last 50 metres in a 400-metre IM,6 n; w- n% J; B: o/ o5 n
Lochter is not the example I would have used if I were the author. What kind
2 T. i& Z1 y) O' E2 x0 k0 fof scientific rigorousness is Callaway trying to demonstrate here? Is it9 P- [$ b+ P# _% Z+ O
logical that if Lochter is the champion, we should assume that he leads in: l2 e) t5 s B- N9 q6 u3 _! i# H3 Y
every split? That would be a terrible way to teach the public how science3 W2 l b9 q3 g& D/ \. O5 F# o
works.* z' x( Y; ^! H- Q/ r9 ~5 q
' E0 K' v1 w2 c6 E. e8 B9 ?3 gFifth is the issue I oppose the most. Callaway quotes Ross Tucker and
) I# E9 [4 }7 z% s; e: Rimplies that a drug test cannot rule out the possibility of doping. Is this# Q$ G+ z, u- [9 d g: M
kind of agnosticism what Nature really wants to teach its readers? By that
$ O7 }; p/ m* ?- F& {! h8 `$ pstandard, I estimate that at least half of the peer-reviewed scientific
9 Q! s. V a' `( Rpapers in Nature should be retracted. How can one convince the editors and
' @/ ^, N& m1 V% d$ u. C3 Hreviewers that their proposed theory works for every possible case? One/ w$ x; m- S0 n M
cannot. One chooses to apply the theory to typical examples and to
- M0 I; n: H8 n/ B' |demonstrate that in (hopefully) all scenarios considered, the theory works4 R R4 V# n4 J$ a3 D
to a degree, and that that should warrant publication until a counterexample) v7 W/ V9 C6 c0 E
is found. I could imagine that Callaway has a sceptical mind, which is
) Q7 ]0 w6 D: ^8 l( v6 j$ c0 vcrucial to scientific thinking, but that would be put to better use if he
; `' I* Z; A0 t- twrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
3 K1 G# A @, y7 |# h1 |2 nadvanced, non-detectable drug that the Chinese have come up with in the
3 X; @. O0 W' O6 s. e- N! f& Upast 4 years (they obviously did not have it in Beijing, otherwise why not( n$ J/ W) z, F5 n5 o
use it and woo the audience at home?), based on data and rational derivation
9 M3 d# |0 h4 N; X- e; ?. @. This article, however, can be interpreted as saying that all athletes are
' ~7 F4 b1 J, |) y7 Zdoping and the authorities are just not good enough to catch them. That may- f" h3 `% u2 a$ ?+ l
be true, logically, but definitely will not make the case if there is ever a
/ j7 k* }. L- m# F- W. Jhearing by the governing body for water sports, FINA, to determine if Ye" E3 {* L# m3 C
has doped. To ask whether it is possible to obtain a false negative in a k; g. Z7 S {6 E1 |
drug test looks like a rigged question to me. Of course it is possible:' D" O" O5 ^4 S# z/ C- B
other than the athlete taking a drug that the test is not designed to detect
+ l+ ^7 w5 r' R, anyone who has taken quantum 101 will tell you that everything is
) w3 S" d) P6 |: b& `probabilistic in nature, and so there is a probability that the drug in an
0 \: P+ W: J) P- U! V9 _athlete’s system could tunnel out right at the moment of the test. A slight
5 n, D8 Q7 C# B4 Zchance it may be, but should we disregard all test results because of it?
) J3 k+ P; v5 p s. @( z6 j# i: cLet’s be practical and reasonable, and accept that the World Anti-Doping
0 S8 n2 d8 R4 h% _- aagency (WADA) is competent at its job. Ye’s urine sample will be stored for
' [$ P: q$ f0 D& D0 {/ Jeight years after the contest for future testing as technology advances.. T4 Q9 @/ |+ u: i- ]9 y; | A/ N7 b
Innocent until proven guilty, shouldn’t it be?
+ F0 ^7 z% f1 F9 b1 `8 ~1 m! f) o! O3 M( D2 D/ u4 P) v+ b
Sixth, and the last point I would like to make, is that the out-of-
* n# b; o+ Q3 n1 {8 F$ {competition drug test is already in effect, which Callaway failed to mention
, ^, p3 F1 |. v/ u: z/ {0 V. As noted in the president of WADA’s press release, drug testing for
. O9 u: T3 n$ KOlympians began at least six months before the opening of the London- i% h6 _3 Q, F2 o3 _
Olympics. Furthermore, 107 athletes have been banned from this Olympics for% {0 y" C- j3 e1 P
doping. That may be the reason that “everyone will pass at the Olympic1 M. L5 z v H( F* y8 \, l9 T
games. Hardly anyone fails in competition testing” — those who did dope% W1 y4 @3 T* I8 p
have already been caught and sanctioned. Callaway is free to suggest that a+ A: t+ Z( {5 u/ C
player could have doped beforehand and fooled the test at the game, but this0 j( R" B4 F# _3 T; g
possibility is certainly ruled out for Ye.
. x: Y6 Q9 N( m6 Y2 w& K/ L" M/ k" w0 w! m/ Q4 L; c3 F
Over all, even though Callaway did not falsify any data, he did (- U, [" W1 b* X6 ?! e! R
intentionally or not) cherry-pick data that, in my view, are far too
D( X' `3 u# s7 _ E! `* rsuggestive to be fair and unbiased. If you want to cover a story of a
' k) M' c, @! R0 Wsuspected doping from a scientific point of view, be impartial and provide7 G+ \- b1 }" u. j* H2 }& |
all the facts for the reader to judge. You are entitled to your
% O/ Y+ q& [; u: Zinterpretation of the facts, and the expression thereof in your piece,
+ ^6 w! U: Z9 Y: l9 a3 _ U: aexplicitly or otherwise, but showing only evidence that favours your! B, `$ v- [0 v# J
argument is hardly good science or journalism. Such an article in a journal
- h$ G& g% j8 y* P" M7 }; O$ Gsuch as Nature is not an appropriate example of how scientific research or7 P( H j6 o7 [& n& }& C0 T' `1 r
reporting should be done. |
|