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2008年11月29日 星期六

Web2.0時代搜尋引擎最新需求


文字: 賴威慎 影像: 圖/資策會創研所


  在2007年,sersearch.com網站上,做了一個次世代搜尋引擎的使用者功能投票,在698份的有效票中顯示,38%(262票)的使用者希望搜尋引擎能更瞭解使用者的搜尋字串;而有另外26%(179票)的選票,希望搜尋引擎能提供給使用者更適當(relevant)的搜尋結果,兩者合佔了全部選票的64%。

在Yahoo!於今年所做的一份報告中,整理使用者的資訊需求比重,其中說明了導航式的資訊需求(想去某個網站的需求)只佔了使用者所有資訊需求的約15%~25%,不及於資訊式資訊需求(40%~65%)及交易式資訊需求(20%~35%)。然而,主流的搜尋引擎,將要解決的問題重心放在【搜尋結果的公正排序方法】上,希望能做到不被使用者看破手腳的公正排序方法;正因如此,目前的主流搜尋引擎大多適合解IR(Information Retrieval)領域中導航式資訊需求(Navigational Information Need);對於常見的另外兩種資訊式需求(Informational Information Need)以及交易式需求(Transactional Information Need),則著墨較少。

我們以目前搜尋引擎的龍頭Google和Yahoo!兩者為例,在網路上尋找資源的方法分為兩種,一種為搜尋引擎、另一種為分類瀏覽架構(如雅虎拍賣的分類瀏覽)。

搜尋引擎雖然可以快速的回傳給使用者大量資料,然而關鍵字的搜尋比較適合程度較進階的網路使用者,根據雅虎最近的報告顯示,有85%的使用者,無法在第一次的關鍵字搜尋就找到想要的結果;另外,目前主流的幾個搜尋引擎,對其搜尋的結果呈現並未經過整理分類,直接一筆一筆的陳列在使用者面前;如果,使用者是想尋找某一特定網站,算是具有相當的便利性。

然而,若是為了學習某一概念而蒐集資料,面對未經整理的搜尋結果,必須一個個網頁點閱,時常會發生重複拜訪某一頁面,或點入不相關的網頁;分類瀏覽架構則因分類架構較不親近使用者,使得使用者不容易跟隨該架構瀏覽網路資源。尤有甚者,分類架構中的瀏覽頁面為網頁提供者所編排好的結果,是網頁提供者希望使用者閱讀的資訊,而非使用者本身想要尋找的資訊。

更快速的回應導航式需求

擁有導航式資訊需求的使用者,由於已經知道自己想要去的網站,只是想由搜尋引擎找到網站的網址連結,所以講求的是快速反應。

由web2.0的重要技術特徵──異步JavaScript和XML(Ajax - Asynchronous JavaScript and XML)可以看出,Web2.0講求對使用者提供更友善與更快速反應的使用介面。其中,有一種流行的應用方式──關鍵字自動補完,可以在使用者輸入搜尋字串的過程中,預測使用者可能想輸入的關鍵字,並且用下拉式選單的方式推薦給使用者。這種關鍵字推薦的方式可以幫助使用者更快速的完成輸入;不過,在更先進的研究中,已經有人開始提出可以直接在推薦的下拉式選單中,先猜測使用者想去的網站,並直接推薦給他,讓使用者可以更快速的到達目的地。

在著名的 ReadWrite 去年9月所發布的百大替代搜尋引擎(The Top 100 Alternative Search Engines)中,大部份的網站提供跨網站的搜尋功能,讓使用者在統一的搜尋介面中,自由的組合要搜尋的網站群組,或是搜尋的資源類別組合。

另外,南韓第一大的搜尋引擎【Naver】,以分類式的結果呈現,成功打敗了google,在當地佔有超過70%的市場。除此之外,KartOO和Vivisimo等網站以自動針對搜尋結果作關鍵字叢集的方法,讓使用者可以根據結果的關鍵字分布,以樹狀結構的方式瀏覽搜尋結果。

更豐富的資訊導覽方式

新興Web2.0網站應用中,提供了以使用者為中心的標籤(Tag)功能,使用者可以針對有興趣的網頁進行標籤,而經由網站上匯集所有被標記的標籤,形成了標籤雲(Tag Cloud),其中標籤字形越大者,表示是越多使用者採用的標籤(熱門標籤),上圖為摘自del.icio.us的標籤雲,使用者可以藉此觀察目前網站上面最熱門的相關主題。


此外,隨著Web2.0的潮流而來的是大量網路服務平台。透過這些平台,使用者自行製造網路內容(web content),彼此分享,結果導致大量的網路資源出現。在面對大量的搜尋結果,已經有許多網站開始嘗試提供使用者更豐富方便資源導覽方式,例如可以讓使用者自己設定搜尋條件區間的多維度搜尋(faceted search),或是利用將關鍵字作叢集或是建立關聯的方式,讓使用者除了搜尋之外,可藉由關聯辭導覽,漸進式的向自己想要的資源趨近。這種透過概念關聯地圖導覽的方法,讓使用者在資源中漫遊的【導覽式搜尋】(exploratory search)方式,目前也是一種趨勢,和多維度搜尋都是幫助使用者更明確的表達自己的資訊需求,讓使用者更輕鬆的搜尋網路資源。目前比較成熟的例子有Quintura和LivePlasma等等網站。

更多元的網路社群互動分析

新的搜尋趨勢中,人的搜尋也是一個重要議題。其中,可簡單分為專家搜尋和一般的尋人服務;目前,目前的研究以專家服務為主,透過尋找專家,增加滿足使用者資訊需求的機會,並進一步幫助使用者完成自己的任務。

以社會網路觀點進行觀察,隨著個人專精的問題領域與水準不同,知識分享行為過程中,個人的角色資訊是動態改變的。

目前,標籤式網路服務針對這些角色(人、標籤、網頁)僅提供兩兩相連之關係,三者之間無法形成密切關聯,無法協助使用者快速尋找到所關注的角色(人、標籤、網頁),這些資源缺乏整合,所以當使用者想同時尋找各種資源時,則必須大費周章的到各站使用同一個關鍵字重複搜尋;而眾所熟知的搜尋引擎(如Google),在搜尋網頁時是依據Page Rank方法篩選內容,其結果雖可提供快速且大量的熱門網頁,但是網頁資料並未經過分類整理,造成使用不便。如果能夠將Tag cloud作為人與資訊的中介,由於資料的標注行為找到了動力而有機會實現理想中的Semantic Web世界。



<延伸閱讀>

解密Web2.0成功方程式地圖日記如何一夕成名?

長遠的能源策略,讓冰島面對破產無懼




 ■ 文、攝影/李鎮樟
冰島去年才獲選為全球最適宜人類居住國家,沒想到卻成為全球金融風暴中,第一個瀕臨破產的國家。北歐五國的人土風情,尤其是冰島冰火之美,一直是我的旅遊目標之一,即使在出發前兩天,獲知冰島即將破產,依然不減我前往冰島的好奇心,想去一探究竟:這30萬人口的小國,如何面對國家財政的困境。

冰島政府目前決議接受國際貨幣基金(IMF)主導之60億美元(IMF 出資21億美元)的紓困案,希望扭轉即將破產的命運。我在冰島的觀察,人民未呈現崩潰前的慌亂,生活依然非常坦然與自在,恬靜的過日子,彷彿這一切都與他們無關。

他們的鎮靜其來有自。冰島人維京海盜祖先在冰火之島建立家園1000多年以來,冰島屢經大起大落,民族性特別能勇敢冷靜面對艱難挑戰,最終都能克服各種困難,在很短的時間又重新站起來,所以,他們相信這一切很快都會過去。這次冰島之所以會成為金融海嘯第一個受害國,主要是他們的銀行太貪心了,到處借錢作多金融衍生性產品(連動債等),金融泡沫一破,就成斷頭。漁民出身的銀行家空有小聰明但是智慧不夠,拖垮國家財政,只好尋求外援。 不過,冰島人民仍然對他們自己的未來有信心,這就夠了。

他們的篤定也其來有自:面對全球石油愈來愈枯竭的危機,石化(石油、天然氣、煤)燃料的供給已經不敷使用,冰島人卻老神在在,他們擁有「地熱」和「氫能源」這兩項長期發展有成的資源,表示未來有足夠的能力可以很快還清IMF債務。

冰島擁有這些天然資源,可以說是在創業中擁有「不公平的優勢」(unfair advantage),也可以說是先天上佔了便宜。當然更重要的是,冰島深知這些價值,而且很早開始就徹底執行,並期許將來可以把這些能源的Know-how輸出到其他的國家,成為能源大國之一。

冰島推動環保生活與經濟,一直都非常有心。在去年(2007年)年底,冰島全球第一家「加氫站」為自小客車提供加氫服務,這種利用氫氣為再生資源的方式,不會產生二氧化碳等溫室氣體,只會產生「水」而已。事實上,這些做法早在10年前由政府領導,冰島政府已打算建立一個永續的氫能社會;政府在1999年成立新能源公司,政府股份佔51%,朋馳、英國殼牌和挪威水電等大廠佔16%,推行相關的做法。以這幾年戮力推行與發展的速度來看,2050年後,冰島將完全擺脫石化燃料的需求,成為全世界第一個氫能經濟的國家。氫的取得來源有幾種,第一就是把水分解成氫和氧,或者是自天然氣及甲烷(俗稱沼氣)分離出氫。當然這些開發需要成本,如何減低這些成本也是冰島努力的方向。

連餐廳老闆也在推行乾淨能源

包含冰島的北歐各國都很注重環境保護以及永續經營。旅程中經另一北歐首都,我們經過一條河邊的街道,街道旁一邊是河邊,另一邊是餐廳林立,街道上每隔一段距離就有一個鐵桶子,然而,街道附近已經有垃圾桶,這個桶子顯然不是設計來丟垃圾的,那它的用途會是什麼?我們想要尋找答案,但是這些桶子的蓋子都打不開。

大家正議論紛紛,這時有個頭髮灰白的餐廳老闆拿了一小桶廚餘走出來,手裡拿著一個RFID的鑰匙,走到這個桶子旁感應一下,這個桶子就會自動打開,它就把這些廚餘倒入桶子內。謎底揭曉:原來這些桶子是用來處理廚餘的桶子,這些廚餘桶的廚餘會經過地底下的輸送帶傳送,集中輸到沼氣工廠,把這些廚餘打碎、處理成再生能源。因為這些桶子加了負壓,讓這些廚餘的味道不會隨著空氣而散出來,即使蓋子掀開也不會有腐敗的臭味。你猜怎麼著:它們這樣處理廚餘與製造沼氣,已經超過10年了。

地熱資源豐沛 間歇泉直衝雲霄

凡是到冰島旅遊的旅客,莫不對冰島豐沛的地熱資源感到驚訝,許多地方都可以看到間歇泉的觀賞區,每隔一段時間就會噴出,甚至直衝雲霄。冰島政府把這些資源發展為各城市的主要能源,例如冰島首都雷克亞未克,就是百分之百靠地熱提供能源的都市。而隨著地熱資源的廣泛使用,對國家的經濟發展也具有十分顯著的效益,冰島總統也曾表示,靠地熱發電可讓冰島每10年就可以省下一年國民生產毛額的巨資。當其他國家發展氫能時,碰到最大的阻礙就是需要先產生更多更貴的電,才能產生氫氣。 而冰島到處有的地熱可以幾乎免費(固定投資除外)產生氫氣,這也難怪冰島面對破產危機一點也不緊張,畢竟,多年來的能源經濟發展下來,冰島具有長期自足與富強的實力。

冰島的這些能源發展的Know- how不僅可以提供國內發展,可幫助外國在冰島煉鋁(高耗電產業),甚至可以輸出到國外。目前中國襄陽已經和冰島合作,襄陽過去是以燃燒煤礦發電,但是現在也朝向由乾淨的地熱能源取代煤礦,成為亞洲第一個地熱城市。

還有一點值得介紹給讀者的是,北歐國家的學費從幼稚園直到念到碩士,幾乎都是免費的,唸博士還可以領國家發的薪水。對出國進修有興趣的朋友,可以考慮這個經濟實惠的選擇。(整理.許立佳)

作者簡介:
李鎮樟為國際天使投資家,曾在美、台、星、港等地從事高科技管理、規畫及投資;2006年起以北京為基地,幫助創業家建立世界級企業。由於他經常到世界各地旅遊與攝影,可說是一位旅遊投資天使。

2008年10月28日 星期二

Tesla:Model S

Tesla announces the Model S





Electric Carmaker Tesla Downshifts
Autos October 23, 2008, 5:00PM EST

Funding gaps have put some of the Silicon Valley carmaker's plans on hold
By David Welch

Since its founding in 2003, Elon Musk's Tesla Motors has been a proud creature of Silicon Valley. That's to say a startup with outsize ambitions and a public disdain for business as usual—or at least as practiced by the dinosaurs in Detroit. On a tight budget, Tesla built an electric car, the Roadster, that's acclaimed for its harmonious balance of greenness, beauty, and performance. Tesla has 1,200 back orders for the $100,000 sports car, mostly from wealthy trendsetters.

But Musk, a software entrepreneur who made millions with PayPal (EBAY), has bigger aspirations: He dreams of one day producing a line of electric vehicles for every purse and purpose. A few weeks ago, Tesla seemed to be on the road to making that happen. Musk had verbal commitments for $100 million in private capital, federal loan guarantees geared at jump-starting development of alternative vehicles, and thoughts of going public next year.

TROUBLE AHEAD?
Then the world changed. On Oct. 11 Musk's financial advisers at Goldman Sachs (GS) called with bad news. Investors, fazed by the credit crunch, were suddenly demanding tougher terms. Musk organized bridge financing and poured more of his own money into Tesla. With $55 million-plus at stake, Musk, who is chairman, asked the CEO to step aside, and he took over that role. He began retrenching, laying off 80 of 380 people, cutting costs, and postponing Tesla's second model, the $60,000 Model S sedan. "We're taking action before we're forced to," Musk says.

But delays and tight funds could undercut Musk's long-term vision of selling affordable electric cars to the masses. If oil prices continue their fall and stay below $80 a barrel, Tesla, which currently spends nothing on marketing, could lose some of its buzz. Plus, the startup could lose its first-mover advantage: By 2010, everyone from General Motors (GM) to Toyota Motor (TM), Nissan Motor (NSANY), and Daimler (DAI) expects to launch their own electrified vehicles. James N. Hall, who runs the auto consulting firm 2953 Analytics, sees trouble ahead. "If the market wants [electric cars] in the number Tesla is talking about," he says, "a larger auto company will bury them on cost."

The financing crunch is the second crisis Tesla has endured in the past 12 months. Last year it found that its much hyped $100,000 Roadster was over budget by some $40,000 per car. Tesla had to delay the launch by six months while it looked for a way to make the car profitably. Musk fired founding CEO Martin Eberhard and brought in as interim chief Michael Marks, an executive at electronics maker Flextronics International (FLEX).

A LOT LIKE MOTOR CITY
The crisis was chastening for the Valleyites. With Marks and Musk more involved, Tesla ditched specialty suppliers, one of which had never made parts for mass-market cars before, and brought in established parts makers, some from Detroit. That cut costs by thousands of dollars per car. (Musk says the Roadster now makes money.)

Marks, who left the interim post in December, also urged Tesla to hire more people with auto industry experience. This summer, Tesla recruited engineering and factory veterans from Chrysler, a finance guy from Ford Motor (F), and a design chief from Mazda Motor (F). They were to streamline engineering, make Tesla's far-flung manufacturing operations more efficient, and get spending under control.

The Detroit hands had left flailing domestic carmakers for a startup that was promising to reinvent the industry. What they got instead was, well, more of what they were used to back in Motor City. Instead of planning research and development budgets and doling out money to add staff and produce tomorrow's electric cars, Tesla Chief Financial Officer Deepak Ahuja, the former Ford finance guy, has to swing the budget ax and say "no" more often than he thought he would. "I didn't anticipate that," Ahuja says. "We have to react as fast as we can to changing business conditions."

So far the cost cuts are prosaic and piecemeal—moving the shrinking staff into one office, delaying the Model S until the loan guarantees from the Energy Dept. are available and investors loosen up, replacing the transmission handle with a button. But Tesla will need further-reaching structural changes. For example, it gets car bodies and chassis from British sports car builder Lotus, builds electric motors in Taiwan, and does final assembly in California. Given the shipping and exchange rates, the cost per car is "scary," says Musk. He would consider shifting everything to the U.S., but he can't move body production there until 2010, when the Lotus contract expires.

Of course, cost-cutting will take Tesla only so far. Given the array of electric and hybrid vehicles hitting the roads soon, the company needs to find a way to stand out. Musk is focusing on style. He wants to be the Apple of electric vehicles. He's hired Franz von Holzhausen, who, as Mazda's chief designer for North America, had a big hand in that company's celebrated new look. Musk hopes he'll bring a sophisticated, sporty look to Tesla vehicles.

Musk insists Tesla's next models will be irresistible. The Model S will go up against formidable competition—cars such as the Lexus GS 450h hybrid, the diesel Mercedes E-class, and the Chevrolet Volt. Not that those cars feature Tesla's neck-snapping acceleration and running cost of 4 cents a mile. "Our sedan will crush everything out there," Musk says.

You have to give the man marks for confidence. But the challenges are steep—and not just because a recession looms. Past executives say Musk is a micromanager and shares blame for last year's missteps. Marks acknowledges that developing the Roadster for $150 million was a real feat, but notes Musk isn't an auto guy. "They underestimated what it took to get here, and what it takes going ahead."


Business Exchange: Read, save, and add content on BW's new Web 2.0 topic network
Oil Shock for Plug-Ins?
Is there a future for electric cars? According to an Oct. 20 story in The Washington Post, the combination of rapidly falling oil prices and the credit crunch may well kill off an assortment of plug-in hybrids in the development stage. It's a debatable point, the Post acknowledges. Some industry insiders are betting the appetite for these pricey vehicles won't wane, thanks to growing awareness about the downside of oil dependency.

To read The Washington Post article go to http://bx.businessweek.com/electric-cars/reference

ELECTRIC CARS
As gas prices continue to rise, car companies are rethinking electric cars. In fact, many top companies like General Motors, Nissan and Toyota are announcing new electric vehicles. This topic covers the news and views regarding advancements in electric car technology.

Electric Cars is part of Business Exchange, suggested by Robert Pierce. This topic contains 411 news and 922 blog items. Read updated news, blogs, and resources about Electric Cars. Find user-submitted articles and comments on Electric Cars from like-minded professionals.



Welch is BusinessWeek's Detroit bureau chief.


Engadget

Read - Road & Track writeup


Read - Sneak peek of the rear

2008年8月2日 星期六

Hands On Gizmos: Digitally Inked

In the latest installment of Hands on Gizmos, Andy Jordan looks at some of the quirky side effects of using a digital pen that records audio. (Aug. 1)

Anton the robotic tongue has saved you from electrode doom

by Joshua Fruhlinger, posted Jul 30th 2008 at 6:20AM

So we had a choice: either we let scientists at the University of Sheffield attach electrodes to our tongues, or they were going to go and build their own artificial mouth. Because we're not so into the whole electrode thing, they built "Anton," an animatronic tongue made of soft silicone to help them understand speech and subsequently improve speech-recognition software. This isn't the first of its kind, believe it or not -- there's much competition in the robotic mouth world. Because speech recognition systems aren't really benefiting from simply crowding them full of recorded speech, researchers want to better understand how the mouth produces sound and then create algorithms that can simply recognize speech patterns rather than try to match recordings to recordings. Sounds about right to us. Peep the creepy video after the break.


2008年7月30日 星期三

Anton the robotic tongue has saved you from electrode doom

by Joshua Fruhlinger, posted Jul 30th 2008 at 6:20AM

So we had a choice: either we let scientists at the University of Sheffield attach electrodes to our tongues, or they were going to go and build their own artificial mouth. Because we're not so into the whole electrode thing, they built "Anton," an animatronic tongue made of soft silicone to help them understand speech and subsequently improve speech-recognition software. This isn't the first of its kind, believe it or not -- there's much competition in the robotic mouth world. Because speech recognition systems aren't really benefiting from simply crowding them full of recorded speech, researchers want to better understand how the mouth produces sound and then create algorithms that can simply recognize speech patterns rather than try to match recordings to recordings. Sounds about right to us. Peep the creepy video after the break.


2008年1月18日 星期五