Yahoo奇摩 網頁搜尋

  1. Solar energy - Wikipedia

    en.wikipedia.org/wiki/Solar_energy

    Solar energy is radiant light and heat from the Sun that is harnessed using a range of ever-evolving technologies such as solar heating, photovoltaics, solar thermal energy, solar architecture, molten salt power plants and artificial ...

    • ~200
    • 3,850,000
    • 539
    • 2,250
  2. Gore-Tex - Wikipedia

    en.wikipedia.org/wiki/Gore-Tex
    • History
    • Manufacture
    • Design
    • Clothing Technology
    • Other Uses
    • See Also
    • External Links

    Gore-Tex was co-invented by Wilbert L. Gore and Gore's son, Robert W. Gore. In 1969, Bob Gore stretched heated rods of polytetrafluoroethylene (PTFE) and created expanded polytetrafluoroethylene (ePTFE). His discovery of the right conditions for stretching PTFE was a happy accident, born partly of frustration. Instead of slowly stretching the heated material, he applied a sudden, accelerating yank. The solid PTFE unexpectedly stretched about 800%, forming a microporous structure that was about 70% air.It was introduced to the public under the trademark Gore-Tex. Gore promptly applied for and obtained the following patents: 1. U.S. Patent 3,953,566, issued April 27, 1976, for a porous form of polytetrafluoroethylene with a micro-structure characterized by nodes interconnected by fibrils 2. U.S. Patent 4,187,390, issued February 5, 1980 3. U.S. Patent 4,194,041on March 18, 1980 for a "waterproof laminate", together with Samuel Allen Another form of stretched PTFE tape was produced pri...

    PTFE is made using an emulsion polymerization process that utilizes the fluorosurfactant PFOA,a persistent environmental contaminant. In 2013, Gore eliminated the use of PFOAs in the manufacture of its weatherproof functional fabrics.

    Gore-Tex materials are typically based on thermo-mechanically expanded PTFE and other fluoropolymer products. They are used in a wide variety of applications such as high-performance fabrics, medical implants, filter media, insulation for wires and cables, gaskets, and sealants. However, Gore-Tex fabric is best known for its use in protective, yet breathable, rainwear. The simplest sort of rain wear is a two layer sandwich. The outer layer is typically woven nylon or polyester and provides strength. The inner one is polyurethane(abbreviated: PU), and provides water resistance, at the cost of breathability. Early Gore-Tex fabric replaced the inner layer of PU with a thin, porous fluoropolymer membrane (Teflon) coating that is bonded to a fabric. This membrane had about 9 billion pores per square inch (around 1.4 billion pores per square centimeter). Each pore is approximately ​1⁄20,000the size of a water droplet, making it impenetrable to liquid water while still allowing the more vo...

    Expanded polytetrafluoroethylene is used in clothing due to its breathability and water protection capabilities. It is used in rain jackets, and ePTFE can now be found in space suits and heart patches.

    Gore-Tex is also used internally in medical applications, because it is nearly inert inside the body. Specifically, expanded polytetrafluoroethylene (E-PTFE) can take the form of a fabric-like mesh. Implementing and applying the mesh form in the medical field is a promising type of technological material feature. In addition, the porosity of Gore-Tex permits the body's own tissue to grow through the material, integrating grafted material into the circulation system. Gore-Tex is used in a wide variety of medical applications, including sutures, vascular grafts, heart patches, and synthetic knee ligaments, which have saved thousands of lives. In the form of expanded polytetrafluoroethylene (E-PTFE), Gore-Tex has been shown to be a reliable synthetic, medical material in treating patients with nasal dorsal interruptions. In more recent observations, expanded polytetrafluoroethylene (E-PTFE) has recently been used as membrane implants for glaucoma surgery. Gore-Tex has been used for man...

  3. Colombia - Wikipedia

    en.wikipedia.org/wiki/Colombia

    Colombia (/ k ə ˈ l ʌ m b i ə / (listen) kə-LUM-bee-ə, /-ˈ l ɒ m-/- LOM-; [12] Spanish: [koˈlombja] (listen)), officially the Republic of Colombia, [a] is a country in South America.It is bounded on the north by the Caribbean Sea, the northwest ...

  4. Madagascar - Wikipedia

    en.wikipedia.org/wiki/Madagascar

    Madagascar (/ ˌ m æ d ə ˈ ɡ æ s k ər,-k ɑːr /; Malagasy: Madagasikara), officially the Republic of Madagascar (Malagasy: Repoblikan'i Madagasikara, Malagasy pronunciation: [republiˈkʲan madaɡasˈkʲarə ]; French: République de Madagascar), and ...

  5. 2020–21 NBA season - Wikipedia

    en.wikipedia.org/wiki/2020–21_NBA_season

    The 2020–21 NBA season was the 75th season of the National Basketball Association (NBA). Due to the COVID-19 pandemic, the regular season was reduced to 72 games for each team, and began on December 22, 2020. The season started just 72 days ...

  6. Twice - Wikipedia

    en.wikipedia.org/wiki/TWICE

    Twice ( Korean : 트와이스; Japanese: トゥワイス ), commonly stylized as TWICE, is a South Korean girl group formed by JYP Entertainment. The group is composed of nine members: Nayeon, Jeongyeon, Momo, Sana, Jihyo, Mina, Dahyun, Chaeyoung, and ...

  7. Amazon (company) - Wikipedia

    en.wikipedia.org/wiki/Amazon_(company)

    Amazon.com, Inc. [8] (/ ˈ æ m ə z ɒ n / AM-ə-zon) is an American multinational technology company which focuses on e-commerce, cloud computing, digital streaming, and artificial intelligence.It is one of the Big Five companies in the U.S. ...

  8. iPhone 8 - Wikipedia

    en.wikipedia.org/wiki/IPhone_8
    • History
    • Specifications
    • Reception
    • Issues
    • See Also

    On August 31, 2017, Apple invited the press to a media event at the Steve Jobs Theater in the Apple Park campus on September 12, 2017.The iPhone 8 and iPhone 8 Plus were announced at that event, and released on September 22, 2017. On April 9, 2018, Apple introduced an iPhone 8 with a red color finish and a black front, in support of their partnership with Product Red and their AIDSfundraising campaign. In March 2020, Apple started selling refurbished iPhone 8 Plus models starting at $469.In May 2020, Apple started selling iPhone 8 models starting at $339. On April 15, 2020, Apple announced the second-generation iPhone SEand discontinued the iPhone 8 and 8 Plus, which share most of the same specifications with the exception of the iPhone SE's A13 Bionic processor.

    Software

    The iPhone 8 and 8 Plus were supplied with iOS 11 on launch, and supports iOS 12, iOS 13, iOS 14, and iOS 15.

    Samuel Axon of Ars Technica called the A11 processor "a marvelous feat of engineering", writing that it offers "industry-leading performance". Axon also praised the cameras, writing that "The colors are great, and low light performance is very good for a smartphone". Chris Velazco of Engadgetpraised the speed of the A11 processor, the build quality and the "excellent" camera, while criticizing design familiarities with previous iPhone generations and limited water-protection levels compared to competitors. John McCann of TechRadarenjoyed the feel of the glass back despite criticizing the phone's overall design. McCann also praised the camera and called inductive charging a "useful" addition to the iPhone lineup. David Pierce of Wiredsimilarly stated that the iPhone 8 models were overshadowed by the iPhone X, despite calling them "virtually perfect phones". Pierce praised performance, cameras, and displays, while repeatedly criticizing the "outdated" design. Nilay Patel of The Vergec...

    On August 31, 2018, Apple announced that a "very small percentage" of iPhone 8 devices released between September 2017 and March 2018 contained a manufacturing defect in the logic board. This fault affected iPhone 8 models sold in Australia, China, Hong Kong, India, Japan, Macau, New Zealand, and the United States. Defective devices may experience unexpected reboots, a frozen or unresponsive screen, or may fail to turn on. Users with an affected device, as determined by their serial number, can have their device replaced for free by Apple. This issue does not affect the iPhone 8 Plus.