 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
$ l3 G4 C0 G9 m$ o8 @" x5 j* t如果是中国长大的,英语能到这种程度真是很不简单。
5 _" b5 X7 s0 @6 k- [ U1 t1 s' a) x
http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
3 C: N/ P0 t- S. m6 X/ r; G
0 ~ {6 A6 {$ r* F" Q. L+ V/ f" Z: BFROM LAI JIANG, Department of Chemistry, University of Pennsylvania _' r( ?, u) K: s/ l* s
! n$ {8 G5 \7 m' [, p# F$ F
It is a shame to see Nature — which nearly all scientists, including myself
8 R) v* N* r% n: R- O, regard as one of the most prestigious and influential physical-science
3 C- D& O1 f" i B5 b, omagazines — publish a thinly veiled biased article like this. Granted, this
$ ~1 C$ W8 Y5 y0 Z9 Q3 Wis not a peer-reviewed scientific article and did not go through the
' B' V$ e" h& H% g% Y4 G- ~' d @scrutiny of picking referees. But to serve as a channel for the general2 ^0 _- u& @" j j9 m( `
populace to be in touch with and appreciate science, the authors and editors
) z6 y, m3 c' v" H& \# b0 lshould at least present the readers with facts within the proper context,' \/ G( i6 a! a o
which they blatantly failed to do.1 [. H: @3 F3 v; }7 q$ B
* O/ a0 \5 g) L9 F$ `First, to identify Ye’s performance increase, Ewen Callaway compared her, P5 R# R) D' w% ~+ @6 o. t
Olympic 400-metre IM time with her performance at the World Championships in
; g2 }3 P5 t& E9 P2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
1 S6 m3 W2 U6 Y+ {/ eanomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
3 Z/ g- g; p1 E5 Z2 opersonal best was 4:33.79 at the Asian Games in 2010. This leads to an+ h4 c% _" \7 V" Q: P1 B1 C7 Q
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the
1 y- G, G) e! _1 `/ ]' Zdifference between the gold and silver medal, I see no reason for 5.38 s to
7 h6 W9 d( @0 O/ qbe treated as 7 s.( ` D6 W A( E2 W& S+ E
2 U3 X/ x5 [+ X- B3 k( oSecond, as previously pointed out, Ye is only 16 years old and her body is% ]" @+ P7 w% d8 Q5 o- u: U# F: v
still developing. Bettering oneself by 5 seconds over two years may seem
4 j& Z: H2 f, P, i, [impossible for an adult swimmer, but it certainly happens among youngsters.) r( q& z8 X5 K
An interview with Australian gold medallist Ian Thorpe revealed that his 400- R# c' Q* Y: ^7 w, N9 z; k' W6 K
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
) j- d) T4 F: m, W- r# [+ DFor regular people, including Callaway, it may be hard to imagine what an
+ L- L3 f7 @4 F8 M! F$ R! d, F1 {6 jelite swimmer can achieve as he or she matures and undergoes scientific and
" a: ^2 ]; X) _persistent training. But jumping to the conclusion that it is “anomalous”2 l+ { l, h% U) m
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.$ V' _) i. q) j$ ~( U- t
]( _2 {2 o3 {/ C' n1 k8 r r
Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook' k1 x+ U( u8 B. v% h- [- w) q. Q, @9 w; W
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
7 `: p, `# {* Qthe last 50 metres, but Lochte had a huge lead in the first 300 metres, so. m" g* N( m) E
he chose not to push himself too hard and to conserve his energy for later
0 a6 T P1 ]. Levents (whether this conforms to the Olympic spirit and the ‘use one’s# {0 |& @0 B; b) C
best efforts to win a match’ requirement that the Badminton World
- M1 K" C% u+ ?: b1 MFederation recently invoked to disqualify four badminton pairs is another7 a- N: t7 k" F& R# Y9 y3 d
topic worth discussing, though probably not in Nature). Ye, on the other [* n: U" J; v) E( Z
hand, was trailing behind after the first 300 metres and relied on freestyle. d1 X$ @( q- H) t3 M1 e* h# y
, in which she has an edge, to win the race. Failing to mention this
$ r3 \- W/ c/ Istrategic difference, as well as the fact that Lochte is 23.25 seconds2 \ V4 g6 z0 ? a0 z
faster (4:05.18) than Ye overall, creates the illusion that a woman swam- L2 _6 h7 p) j1 R5 A5 T$ ~( z
faster than the best man in the same sport, which sounds impossible. Putting2 ^1 N- l i# f1 t
aside the gender argument, I believe this is still a leading question that
7 V% n% o4 q Q, D# m: B ~implies to the reader that there is something fishy going on." x- W# b; n9 @
3 _( h8 w# Q& sFourth is another example of cherry-picking. In the same event, there are
! {: `2 a8 o! K qfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
3 b) t5 R3 g- h" O: rs) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
) H, b5 l1 }& g L5 t8 r$ C2 K), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
% M, ?2 M" M5 k) l4 J4 ?2 @' q5 bout, if we are just talking about the last 50 metres in a 400-metre IM,
/ o5 v, o' X' F5 k6 t/ {Lochter is not the example I would have used if I were the author. What kind$ o* x/ L: T4 y4 O
of scientific rigorousness is Callaway trying to demonstrate here? Is it1 p! I7 s' e: j$ b9 U) x
logical that if Lochter is the champion, we should assume that he leads in5 k0 y! L$ ~; Z+ x) z/ W. q% `
every split? That would be a terrible way to teach the public how science' ]+ f% B# Q$ b8 I4 @; V
works.' m6 @5 T' d8 v& {% p6 V- N* b
+ e1 W0 \( s+ dFifth is the issue I oppose the most. Callaway quotes Ross Tucker and
; {: G2 x- [) timplies that a drug test cannot rule out the possibility of doping. Is this
6 ]$ p3 R) Q2 V kkind of agnosticism what Nature really wants to teach its readers? By that7 I) M1 C0 m) w* Y
standard, I estimate that at least half of the peer-reviewed scientific
" ]- ^3 w6 R" |! r- xpapers in Nature should be retracted. How can one convince the editors and
. a. A$ D8 B: j# |reviewers that their proposed theory works for every possible case? One
5 W, Z P" g8 g8 N% {7 l7 S9 F9 K. [cannot. One chooses to apply the theory to typical examples and to
* M& z4 {6 x9 {8 Mdemonstrate that in (hopefully) all scenarios considered, the theory works% F/ ^) z3 n3 e
to a degree, and that that should warrant publication until a counterexample8 P% |0 O6 A3 \& g9 L
is found. I could imagine that Callaway has a sceptical mind, which is% m" e$ O/ R' P$ R, p: z
crucial to scientific thinking, but that would be put to better use if he
, m/ K* [% V( r; Xwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly& s6 P3 v4 `& M, k
advanced, non-detectable drug that the Chinese have come up with in the
$ m/ G/ S$ J! o+ t% ?- vpast 4 years (they obviously did not have it in Beijing, otherwise why not5 J! s6 O( w% d" E) S0 ]; M' R
use it and woo the audience at home?), based on data and rational derivation
6 v# g7 a C6 i0 |* |2 C. This article, however, can be interpreted as saying that all athletes are
" p0 H% F9 ~1 I7 u# odoping and the authorities are just not good enough to catch them. That may$ D) }( r: G3 S' W; p3 N |% G% i
be true, logically, but definitely will not make the case if there is ever a1 S2 k/ v- F; a
hearing by the governing body for water sports, FINA, to determine if Ye, x" a3 J/ x$ v( x2 E
has doped. To ask whether it is possible to obtain a false negative in a
; ?5 B5 S# z$ }( A# {2 u) h7 zdrug test looks like a rigged question to me. Of course it is possible:
`; M7 ]4 K/ `9 ^1 e1 iother than the athlete taking a drug that the test is not designed to detect
- X8 w. b$ j% v3 k3 @+ a$ W( ?, anyone who has taken quantum 101 will tell you that everything is
2 i* n( B" f/ R" S, [1 l* t+ pprobabilistic in nature, and so there is a probability that the drug in an& I7 ]& g- M% E1 s- H4 A- U
athlete’s system could tunnel out right at the moment of the test. A slight% c& d. Q3 ], [. a
chance it may be, but should we disregard all test results because of it?3 D; ?2 f. I0 Q8 N5 j, w
Let’s be practical and reasonable, and accept that the World Anti-Doping5 W& c- B9 X( }7 z
agency (WADA) is competent at its job. Ye’s urine sample will be stored for( }/ J- ?' C$ j* z& L8 I
eight years after the contest for future testing as technology advances.
3 ]: D1 i2 ?) ~. S" uInnocent until proven guilty, shouldn’t it be?
: Y8 P6 L/ t/ {
, t( W' R0 j' {7 J& ZSixth, and the last point I would like to make, is that the out-of-
; o, S5 d' `: x# u7 S. a3 |, M: lcompetition drug test is already in effect, which Callaway failed to mention
3 u; ^9 j" |! ~. As noted in the president of WADA’s press release, drug testing for# H1 o0 J h6 D
Olympians began at least six months before the opening of the London0 O6 `) X7 h( \; J3 t* Z- @
Olympics. Furthermore, 107 athletes have been banned from this Olympics for
8 X3 s; E* p' P% Q+ b5 a7 |doping. That may be the reason that “everyone will pass at the Olympic
, X, [% c& g6 Z1 D4 @) e ggames. Hardly anyone fails in competition testing” — those who did dope
7 R' l. X. l/ Y, ~! y6 Khave already been caught and sanctioned. Callaway is free to suggest that a
p( n4 M9 J) }& l2 splayer could have doped beforehand and fooled the test at the game, but this0 _' d( E4 G3 g5 K5 l
possibility is certainly ruled out for Ye.
: o6 T" n8 z& B: U* d5 e! h1 P( p1 ?8 A& X; I
Over all, even though Callaway did not falsify any data, he did (1 k+ b$ d; D: U: ?
intentionally or not) cherry-pick data that, in my view, are far too6 ?. Z+ Z- K m0 d4 ^; l8 h
suggestive to be fair and unbiased. If you want to cover a story of a* ^6 i7 Z& M) V
suspected doping from a scientific point of view, be impartial and provide: B6 c) s) j) E" V9 c* M1 r
all the facts for the reader to judge. You are entitled to your
0 L* W- ]% d B6 v* q k4 ^( `/ vinterpretation of the facts, and the expression thereof in your piece,
, N! ]( p5 K# I4 {explicitly or otherwise, but showing only evidence that favours your
/ a2 C, C' ~9 o: y7 m+ _6 }0 I! ^( Rargument is hardly good science or journalism. Such an article in a journal- }' J! H4 L) ~3 a
such as Nature is not an appropriate example of how scientific research or- |' D- D' T( U" i6 p
reporting should be done. |
|