Archive for December, 2010

Nike+ GPS tested again, and again

December 31, 2010

I reset all previous calibration and started off fresh with Nike+ GPS app again this morning, here it showed 5.26k

20101231_nikeplus

while Garmin 410 showed 5.06k exactly as before. In fact the turning back point at 2.5k was in fact a bit earlier than my last run. Garmin also showed a slight difference in elevation gain of 12m between 2 runs.

I guess an error of 3.95% isn’t too bad (assuming Garmin is right).

I’ll do a longer run this Sunday with Garmin and Nike+ GPS app.

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開方爸爸

December 30, 2010

早前教了阿仔什麼是 square of 如 “二的平方”。其後便是 Pythagoras theorem 這也不太難明白。

要他明白開方 square root 這符號就有點難,只因小學只會用上加減乘除和等號。開方這符號裏面有一數字又會等如另一個數字的確有點怪。

最後想到最好用兒童語言,兒童常用復字如"媽媽,爸爸,仔仔",阿仔的 nick name 就是 “boy boy”, 有時寫在紙上也會寫 boy square。

開方(媽媽)= 媽
開方(boyboy) = boy
開方(3)就是要找一個數乘自己等如 3。

當然最先要教的是"爸爸"不是 “爸+爸” 是 “爸乘爸” !

Nike+ GPS tested again

December 29, 2010

I tested the Nike+ GPS iPhone app more than a month ago, I compared it against milestones and miCoach, it was disappointing.

Recently I saw a few updates of this App so I tested it again. At last GPS signal is good enough to show me the map
20101229_Nikeplus

this is what Garmin 410 recorded
20101229_garmin

The distance of Nike+ app is still terribly out by more than 6% (if Garmin 410 is right).

I calibrated the app last time after seeing the error of 7.61 v 6, now the app has been updated may be I should reset the calibration and try again.

My lucky day

December 26, 2010

I had to redo this beautiful route.

Went to see “walking with dinosaurs” last night and it was cold and raining. This morning I was lucky to have blue sky and sunshine. Let’s get going

Ting Kau Bridge
IMG_0408

Tsing Ma Bridge
IMG_0409

running with ocean going vessel
IMG_0410

the most beautiful coastline in Hong Kong
IMG_0411

Tuen Mun, too much traffic had to stop here
IMG_0412

the complete route
20101226_map_lap

summary of run
20101226_summary

how did I perform
20101226_HR_pace

Nike+ recorded 15:84k time 1:56:30 pace 7:21
Garmin moving 15.71k moving time 1:53:12 moving pace 7:12
A/MHR = 153/163

I’ll do this route again with my new toy.