可愛10班

買相機之注意事項

注意商品品質的優劣，以及畫素和解析度的高低，有保固期限，價格也該合理
顏色就由自己選擇自己所愛
最好選擇大廠牌感覺比較有保障!

螢幕

二、螢幕品質與加值服務
1.亮點與暗點：在螢幕品質方面，消費者要注意亮點與暗點，所謂亮點，是液晶螢幕會有一些發光點永遠不會消失，而暗點則是有些點永遠不會發光，兩者讓消費者使用時感到不舒服。市面上很多液晶螢幕廠商，都會強調液晶螢幕無亮點技術，價格當然貴一些。

2.保固服務：消費者常常以為液晶螢幕不能修，其實好的螢幕廠商，都會提供保固服務，維修與品質服務有保障。

3.可視角度：液晶螢幕受到傳統物理特性的影響，在某些角度，沒有辦法看清螢幕的畫面，因此使用時，必須面對正前方，才能看清楚畫面，因此可視角度愈高，使用的彈性就愈大，目前可視角度大部分是50度，而有些廠商則是做到70度。

4.反應時間：當消費者利用電腦觀看電影或是玩遊戲時，常常會發生殘影的現象，雖然不影響螢幕正常運作，但看起卻不舒服，造成這種的現象的就是液晶螢幕的反應時間。消費者在選購時，一定要注意反應時間，品質佳的液晶螢幕，反應時間就愈快。

相機的歷史演進

1841年，日本御用商人上野俊之丞引進一台法國剛發明的照相機，為當時的名人島津齊彬拍攝了照片，這就是日本的第一張照片。不過，有說現存川崎市民博物館和橫濱美術館收藏的1851年拍攝的美國PERRY艦隊三名水手的照片，才是日本最早的照片。

法國畫家Daguerre﹙1787-1851﹚有一天在一個小山丘上畫日落，突引發一個念頭，為什麼不能想辦法把真實的情景留下來呢？他將自己的想法告訴了另一位畫家Niepce﹙1765-1833﹚，於是兩人開始了他們的研究。1822年，他們發明了透視畫，這種猶如幻燈片的透視畫曾流行於明治中期的東京淺草一帶。1826年，他們又進一步發明了日光膠版，終於在1839年發明了銀版照相。為了紀念這一發明，人們把這種銀版照相冠予Daguerre的名字。當初的銀版照相至今仍保存於巴黎。

幾乎在同一時期，英國的美索不達米亞楔形文字解讀者Tarbot ﹙1800-1877﹚也發明了類似的照相技術。真正的「照相」名稱是在之後出現的。

1880年，美國的喬治.伊斯托馬﹙1854-1932﹚發明了劃時代的感光膠片，並於同年創立了「柯達」，進而於1885年將膠片做成卷狀，放入捲筒內，終於發明了新型的照相機,。「你只要按下快門，之後的一切我們會幫你」喬治於1888年正式將新型的照相機推出市場時，自豪地對消費者這樣說。

喬治發明的捲筒式膠卷引起了發明大王愛迪遜的關注，如果把一張張的照片連接起來的話，豈不是可以製成動畫了嗎？愛迪遜於1891年發明了放映機，愛迪遜放映機只能放在一隻暗盒中看。但是它卻刺激了法國的Lumiere兄弟倆的靈感，他們於1895年將愛迪遜放映機改良成投影裝置，發明了電影。


1935年，「柯達」又有了劃時代的發明，「柯達」發明了三原色彩色膠卷，只要打印在影印紙上，一張漂亮的彩色照片就出現在人們的眼前。終於實現了法國畫家Daguerre「把真實的情景留下來」的願望。

1937年，蘭度再為人類創新，發明了「波拉羅伊德相機」，這是一種立等可取的相機，有人笑稱這種相機為「instant camera」。

二次大戰結束後，日本的相機生產商充滿了生機。當時的人們生活十分困苦，然而向西方學習的思想卻促使人們去買相機。同時，日本開始出口相機。當時最出名的恐怕要數「荻本商會」了，荻本商會以銷售先進的單眼鏡頭相機為主，可是，人們對單眼鏡頭相機認識不足，一般都喜歡用雙鏡頭相機，荻本商會最終以倒產收場，老板一家也因此而離散。不過，單眼鏡頭相機在1955年以後幾乎佔領了整個相機市場。

之後相機技術不斷發展，1970年代第一次出現了自動嚗光相機，方便了相機的操作。1982年，攜帶方便的「compact 相機」，將「傻瓜機」帶到了世界上。

改變相機價值的震撼性發明的，應屬1986年發明的一次性相機。富士膠卷公司發明了「連鏡頭膠卷」，並迅速為大眾所接受，人們出門遠足再也不用把相機當作負累，隨處可買到，用後即可扔掉。

使相機世界震驚的當屬1995年卡西歐發明的數碼相機QV-10相機，其後各種類型的數碼相機相繼登場，人們再也不用擔心中途突然膠卷沒有了，只要帶幾張微型卡，就可以拍攝幾十、上百張相片，也可以直接利用電腦即時顯形、放縮小、拼圖等，其效果已遠遠超出了法國畫家Daguerre當初的想像。

心得:
很謝謝他們運用創意與巧思讓我們的生活更美好!
讓現代社會很方便

                         參考資料http://old.photosharp.com.tw/photo123/history-1.htm
     

Charles Babbage

Charles Babbage, FRS (26 December 1791 – 18 October 1871)[2] was an English mathematician, philosopher, inventor, and mechanical engineer who originated the concept of a programmable computer.[3] Parts of his uncompleted mechanisms are on display in the London Science Museum. In 1991, a perfectly functioning difference engine was constructed from Babbage's original plans. Built to tolerances achievable in the 19th century, the success of the finished engine indicated that Babbage's machine would have worked. Nine years later, the Science Museum completed the printer Babbage had designed for the difference engine, an astonishingly complex device for the 19th century. Considered a "father of the computer",[4] Babbage is credited with inventing the first mechanical computer that eventually led to more complex designs.


Difference engine
Main article: Difference engine
In Babbage’s time, numerical tables were calculated by humans who were called ‘computers’, meaning "one who computes", much as a conductor is "one who conducts". At Cambridge, he saw the high error-rate of this human-driven process and started his life’s work of trying to calculate the tables mechanically. He began in 1822 with what he called the difference engine, made to compute values of polynomial functions. Unlike similar efforts of the time, Babbage's difference engine was created to calculate a series of values automatically. By using the method of finite differences, it was possible to avoid the need for multiplication and division.


The London Science Museum's Difference Engine #2, built from Babbage's design.At the beginning of the 1820s, Babbage worked on a prototype of his first difference engine. Some parts of this prototype still survive in the Museum of the history of science in Oxford[24]. This prototype evolved into the "first difference engine." It remained unfinished and the completed fragment is located at the Museum of Science in London. This first difference engine would have been composed of around 25,000 parts, weighed fifteen tons (13,600 kg), and been 8 ft (2.4 m) tall. Although Babbage received ample funding for the project, it was never completed. He later designed an improved version, "Difference Engine No. 2", which was not constructed until 1989–1991, using Babbage's plans and 19th century manufacturing tolerances. It performed its first calculation at the London Science Museum returning results to 31 digits, far more than the average modern pocket calculator.

Completed models
The London Science Museum has constructed two Difference Engines, according to Babbage's plans for the Difference Engine No 2. One is owned by the museum; the other, owned by technology millionaire Nathan Myhrvold, went on exhibit at the Computer History Museum[25] in Mountain View, California on 10 May 2008.[26] The two models that have been constructed are not replicas; until the assembly of the first Difference Engine No 2 by the London Science Museum, no model of the Difference Engine No 2 existed.


                                  參考資料http://en.wikipedia.org/wiki/Charles_Babbage

Intel® Core™ i7 Processor

Brilliantly fast
With faster, intelligent, multi-core technology that applies processing power where it's needed most, Intel® Core™ i7 processors deliver an incredible breakthrough in PC performance. They are the best desktop processor family on the planet¹.

You'll multitask applications faster and unleash incredible digital media creation. And you'll experience maximum performance for everything you do, thanks to the combination of Intel® Turbo Boost technology² and Intel® Hyper-Threading technology (Intel® HT technology)³, which maximizes performance to match your workload.

Features and benefits
Go to the next level of multi-core performance.
Intel Core i7 processors deliver an incredible breakthrough in quad-core performance and feature the latest innovations in processor technologies:

Intel® Turbo Boost technology maximizes speed for demanding applications, dynamically accelerating performance to match your workload—more performance when you need it the most².

Intel® Hyper-Threading technology enables highly threaded applications to get more work done in parallel. With 8 threads available to the operating system, multi-tasking becomes even easier³.

Intel® Smart Cache provides a higher-performance, more efficient cache subsystem. Optimized for industry leading multi-threaded games.

Intel® QuickPath Interconnect is designed for increased bandwidth and low latency. It can achieve data transfer speeds as high as 25.6 GB/sec with the Extreme Edition processor.

Integrated memory controller enables three channels of DDR3 1066 MHz memory, resulting in up to 25.6 GB/sec memory bandwidth. This memory controller's lower latency and higher memory bandwidth delivers amazing performance for data-intensive applications.

Intel® HD Boost significantly improves a broad range of multimedia and compute-intensive applications. The 128-bit SSE instructions are issued at a throughput rate of one per clock cycle, allowing a new level of processing efficiency with SSE4 optimized applications.



參考資料http://www.intel.com/products/processor/corei7/index.htm?iid=prod_desktopcore+body_corei7