Computer

Daan Forest Park.Taipei.Taiwan 像這樣子嗎？ 有粗有細，長短不一的線？ 我沒慧根，哈。 **** 人是需要放鬆的。 自己的嗓門特別大，平常還得注意說話不行太大聲。 不過唱歌的話，就隨便了。 反正有mic，誰唱都一樣大聲。 ...

最近逛書店時，會順便再逛逛文具區。 目前缺的用具是，擦筆和軟橡皮。 擦筆可以用來磨畫紙上已經畫好的筆跡， 軟橡皮則是可以揉成任意形狀，利用按的方式來改變畫面的亮度。 這兩個我到現在還是沒找到。 不過，週日的時候倒是找到了這個：三角形的橡皮擦。 長成這種形狀，有了它之後我就不用再煩惱要把我的pentel橡皮擦轉到哪個角度才是乾淨的。 特地又買了一條橡皮擦芯。 這樣子夠我用上好一陣子吧。 (因為其實我不太用橡皮擦的…) ...

In order to read English novels on my diamond, I installed Collins English Dictionary for mobipocket reader. In this way, I don’t have to go back and forthe between mdict and mobipocket reader.

It’s a shame not knowing common knowledge of 3G networks while working in a mobile phone manufacturer. Well, Obviously, some people do not think so. Here’s the brief outline of radio network change: from first generation to 2G, 2.5G, and 3G. Although 4G is coming on its way, knowing current technologies will help catching up the new ones. Introduction to 3G network History 1G NMT (Nordic Mobile Telephone) NMT-450 NMT-900 International Roaming is possible Scandinavia, Ecntral and Southern Europe TACS (Total Access Communications System) UK standard, based on AMPS 900 MHz AMPS (Advanced Mobile Phone Service) US standard 800 MHz MCS NTT: first cellular network in Japan 2G Feature use digital radio transmission for traffic basic GSM uses 900 MHz 1800 MHz GSM (Global System for Mobile communications) Most successful and widely used 2G system TDMA D-AMPS (digital AMPS) US-TDMA, IS-136, or just TDMA CDMA IS-95 (Code-division Multiple Access) Developed by Qualcomm the only 2G CDMA standard so far IS-95 also called cdmaOne (brand name) PDC (Personal Digital Cellular) Frequency bands 800 MHz 1500 MHz Feature physical layer: similar to D-AMPS protocal stack: resembles GSM Only operated in Japan Digital Cordless systems CT2 DECT (Digital Enhanced Cordless Telecommunications) PHS (Personal Handyphone System) 2.5G new technologies HSCSD High-speed Circuit-switched Data) allocate 4 time slots for transmisstion (9.6 Kbps or 14.4 x 4) summary Good: software updates to network, and phone; good for real time apps Bad: usage of scarce radio resources GPRS (General Packet Radio Services) up to 115 Kbps packet switched suitable for non real-time apps bursty data is well handled do not guarantee an absolute maximum delay EDGE (Enhanced Data Rates for Global Evolution) 3 folds of original GSM speed 8PSK (eight-phase shift keying) GPRS –> EGPRS 384 Kbps maximum IS-136 + (GPRS || EDGE) –> 2.5G Qualcomm CDMA2000 1xRTT IS-95: 14.4 Kbps, 1xRTT: 64 Kbps IS-95 + IS-95B or upgrade CDMA2000 1xRTT –>2.5G HDR (High Data Rate) 2.4 Mbps standardized in IS-856 1xEV-DO (1x Evolved Data Optimized) Add a TDMA component beneath code component PDC-P (NTT DoCoMo) i-mode 3G standard proposals UMTS (Universal Mobile Telecommunications System) Done by ETSI SMG (Special Mobile Group) UMTS Forum was created in 1996 new technologies WCDMA the bandwidth is 5 MHz or more (144kbps, 384kbps or even 2Mbps network Synchronous CDMA2000 compatible with IS-95 manufacturer: Qualcomm, Lucent, Motorola use ANSI-41 core network 3GPP2 (less support than 3GPP) good/not good good: effecient radio interface bad: expensive H/W Asynchronous ETSI/ARIB WCDMA most popular 3G system manufacturer: Ericsson, Nokia, NTT DocoMo rename to UTRAN (FDD) based on GSM MAP network 3GPP feature fast power control vary bit rate, service params on frame by frame basis Advanced TDMA UWC-136 only Hybrid CDMA/TDMA Not supported in fact, it likes UTRAN TDD OFDM spectrum: effecient user: DAB, DVB, 802.11a, 802.11g, ADSL TDMA/CDMA possible good bandwidth effecient resistance to narrow band interference multipath interefrence IMT-2000 umbrella spec of all 3G systems (origin from ITU) IMT Direct Spread (IMT-DS) UTRA FDD 3GPP IMT Multicarrier (IMT-MC) CDMA2000 3GPP2 IMT Time Code (IMT-TC) UTRA-TDD/TD-SCDMA narrowband TDD 3GPP IMT Single Carrier (IMT-SC) UWC-136 IMT Frequency Time (IMT-FT) DECT 3GPP an org that develops spec for 3g system based on UTRA radio interface partners ETSI ARIB TTA TTC CWTS(china wireless telecommunications Standard ULTRA FDD vocabs chip: a bit in a code word spreading factor: chip rate / data bit rate spreading code: a sequence of chips used to modulate the data bits up/down use separate freq bands chip rate: 3.84 Mcps TDD NOrmal: 3.84 Mcps TD-SCDMA: 1.28 Mcps channels physical (air interface) transport between layer 1 and 2 define how data is sent over the air logical within layer 2 define the type of data to be sent 3GPP2 should be backward compatible with IS-95 and here’s the Introduction to 3G network in tree view for better reading.

Seattle.US By clicking on the link of “Liste de partage”, it will list posts that you want to share with others, and with a header listing some common used actions: send the RSS feed address to others by email embed this feed to your blog or website A direct link to this RSS feed By choosing the 3rd item, you will see the posts in a normal way. On the right side of the page, there’s a general RSS feed icon at your service. That’s where you can get a normal RSS feed address to be added to outlook. So, please copy the link first, and then launch Outlook 2007. It’s a memory eating big monster. The performance is not either. However, the new menu design is much more useful than outlook 2003. Moreover, it has built-in RSS reader. It’s convenient to share with others the articles in the RSS feeds. ...

家裡不久前終於裝了無線網路。 中華電信的機子就放在書桌下，所以桌上的筆記型電腦其實用不到無線網路， 只要用條一公尺長的網路線就行了。 裝無線網路的目的是為了讓自己n台device可以三不五時上個網。 ...

It’s always a pain in the ass to sync data between Windows Mobile devices and Desktop PC. I would like to have the convenience of easy syncing just like how it works between ipod/iphone and itunes. Well, maybe one day I will just give up WiMo system and buy a ipod Touch or evan an iPhone. But, before that day comes, I still need to survive with my free Diamond. ...

English Collins Cobuild Collins English Dicitionary 二十一世紀英漢字典 French Le Petit Robert Le Grand Robert Le Robert nomade 2009 HARRAPS French-English Collins Robert French Dictionary Larousse Unabridged Dictionary Le Petit Larousse 2009 Japanese 明鏡國語辭典 新明解國語辭典 廣辭苑 三省堂Super大辭林 研究社 新英和和英中辭典 Genius英和和英 英辭郎 ...

Benthuizen.Netherlands 荷蘭什麼不多，草地最多。 放眼望去，四處都是沒有起伏的草坪。 遠方偶有幾座風車和倉庫。 天空畫爛了，刻意不拍出來… 不然荷蘭的天空也是很有特色的。 ...

Ali Mountain.Taiwan 家人買了S-ATA的硬碟，然後想裝在很舊很舊的電腦上， 所以另外買了一片PCI轉S-ATA的介面卡。 裝上介面卡後，卻怎樣也沒辦法進到原來的Windows XP。 為了讓事情簡單一點，我把自己現在在用的硬碟外接盒直接拆下來。 果然，換成外接盒就什麼問題也沒了。 ...