Sunday, 29 May 2016
Fifth Harmony - Work From Home in the Live Lounge
FIFTH HARMONY-WORK FROM HOME FT TYLA DOLLAR (SAMANTHA CHIN)
A VERY NICE SONG...ENJOY!
Little Mix - Secret Love Song (Official Video) ft. Jason Derulo
LITTLE MIX-SECRET LOVE SONG FT JASON DERULO (SAMANTHA CHIN)
THIS SONG IS VERY POPULAR IN SINGAPORE...HOPE YOU ALL WILL LIKE IT...
THIS SONG IS VERY POPULAR IN SINGAPORE...HOPE YOU ALL WILL LIKE IT...
Friday, 27 May 2016
怎样才能健康长寿 （Lim Ximun 5S）
一、人的长寿秘诀是什么
1、经常劳动，让身体天天都能够得到锻炼。所谓的锻炼不是刻意的为了锻炼而锻炼，生活中勤劳些，有什么事立刻去做，不去拖拖拉拉的等;到哪里去能步行就不要骑车，能骑车就不要打车。每天做家务打扫卫生，来回走动走动这也都是运动。推荐阅读：可以让你长寿的食物有哪些？
2、生活中吃饭八分饱，不贪吃，但要有规律;睡觉不要贪睡，醒了就不要继续睡了;早睡早起，步饭后百走，活到九十九;
3、早起后最好喝一杯水暖胃;冬天的晚上睡觉前可以喝一杯酒活血。生活中时不时的要有些小吃，改变一下自己的口味。 不挑食，啥都能吃，但是肉不能长期多吃，多吃水果蔬菜五谷杂粮为好。
4、宁静致远，如果有条件，最好居住在远离城市远离工业区，空气环境清新的地方，至少所居住的地方不是经常噪音污染严重。
5、淡泊名利，对于金钱、地位还有许许多多的事要看得开，够用就可以了，绝不可以贪得无厌，得不到的东西不可强求;能舍才能有得。 有自制力，不贪迷于任何事物。
6、保持乐观向上的心态，凡是都往开处想，多一些宽容，少一些计较，不以物喜，不以己悲，不要让外界的事物把自己变得很激动，保持心情的平静，让笑容一直留在脸上。
7、多做好事、善事，不做亏心事，对人坦诚以待，但求无愧于心，让善良永远存于心中。
8、与家人和睦相处，与邻里友好往来，与亲友坦诚相待。与人处好关系，心里自然也舒畅。 要有几个特别擅长的爱好，可以打发时间，还可以提高个人修养。领悟人生哲理。
9、适量的多说话可以减少内心的压抑，不会因为心里的忧郁衍生出病来。也不要唠唠叨叨的说个没完，不要说太多的废话。说话要平和，不要总是说话如同与人争吵一般。
10，多吃蔬菜和水果
(chong jing xuan)This is the day Nowadays, everyone depends on technology and they know that if they keep developing the technology their life will be easy, but they don't think that by this development robots can control themselves and they could destroy human life. They will do every awful things, because they are not human and they haven't emotions and feeling. That's why during the war they will not think that this is a child or anything.
This is the day
Nowadays, everyone depends on technology and they know that if they keep developing the technology their life will be easy, but they don't think that by this development robots can control themselves and they could destroy human life. They will do every awful things, because they are not human and they haven't emotions and feeling. That's why during the war they will not think that this is a child or anything.
robot video
hope you like this post,enjoy your day!
Thursday, 26 May 2016
社交媒体 wikipedia -[Foo Pei Shen]-
社交媒体是计算机为媒介的工具，使个人或企业创建，共享，或交换信息，职业兴趣，[1]的想法，和图片/虚拟社区和网络视频。该品种的独立和内置的社交媒体服务目前可引入定义的挑战;但是，也有一些共同的特点：[2]（1）社会化媒体是基于Web 2.0的互联网应用程序，[2] [3]（2）用户生成内容（UGC）是社交媒体有机体的命脉，[ 2] [3]（3）用户创建的网站或应用程序，旨在通过社会媒体组织维护服务特定的配置文件，[2] [4]（4）社会化媒体推动在线社交网络的发展连接用户的个人资料与其他个人和/或团体。[2] [4]社交媒体依赖的移动和基于网络的技术，打造高度互动的平台，让个人和社区共享，共同打造，讨论和修改用户生成内容。他们介绍给企业，组织，团体和个人之间的交流和实质性的变化无处不在。[5]这些变化是technoself研究的新兴领域的焦点。社交媒体与传统或工业媒体在很多方面，包括质量，[6]到达，频率，易用性，即时性，和持久不同。社交媒体在一个对话传输系统（许多来源到许多接收机）。[7]这是在对比的是下一个独白传输模型（一个源到许多接收机）操作传统的媒体操作。
有迹象表明，从互联网使用干很多的影响。根据尼尔森互联网用户继续花更多的时间在社交媒体网站比任何其他类型的网站。与此同时，在美国的跨PC和移动设备上花费了社交媒体的总时间在2011年7月增加了99％至121十亿分钟，2012年7月相比，66个十亿分[8]对于内容贡献者，带来的好处参与社交媒体已经超越了简单的社交共享建立的声誉和带来就业机会和货币收入，如唐，顾和温斯顿（2012）讨论。
New TECHNOLOGY that proves we are in the future -[Foo Pei Shen]-
New technology in the world. Hope you like it.
amazing tecnology in the WORLD!!!!!
amazing tecnology in the WORLD!!!!!
amazing tecnology in the WORLD!!!!!
amazing tecnology in the WORLD!!!!!
Wednesday, 25 May 2016
小心电脑黑客袭击
电脑黑客攻击手段(Hu Yajing)
黑客攻击手段可分为非破坏性攻击和破坏性攻击两类。非破坏性攻击一般是为了扰乱系统的运行，并不盗窃系统资料，通常采用拒绝服务攻击或信息炸弹；破坏性攻击是以侵入他人电脑系黑客攻击统、盗窃系统保密信息、破坏目标系统的数据为目的。下面为大家介绍4种黑客常用的攻击手段。1、后门程序由于程序员设计一些功能复杂的程序时，一般采用模块化的程序设计思想，将整个项目分割为多个功能模块，分别进行设计、调试，这时的后门就是一个模块的秘密入口。在程序开发阶段，后门便于测试、更改和增强模块功能。正常情况下，完成设计之后需要去掉各个模块的后门，不过有时由于疏忽或者其他原因（如将其留在程序中，便于日后访问、测试或维护）后门没有去掉，一些别有用心的人会利用穷举搜索法发现并利用这些后门，然后进入系统并发动攻击。2、信息炸弹信息炸弹是指使用一些特殊工具软件，短时间内向目标服务器发送大量超出系统负荷的信息，造成目标服务器超负荷、网络堵塞、系统崩溃的攻击手段。比如向未打补丁的 Windows 95系统发送特定组合的 UDP 数据包，会导致目标系统死机或重启；向某型号的路由器发送特定数据包致使路由器死机；向某人的电子邮件发送大量的垃圾邮件将此邮箱“撑爆”等。目前常见的信息炸弹有邮件炸弹、逻辑炸弹等。3、拒绝服务
拒绝服务又叫分布式D.O.S攻击，它是使用超出被攻击目标处理能力的大量数据包消耗系统可用系统、带宽资源，最后致使网络服务瘫痪的一种攻击手段。作为攻击者，首先需要通过常规的黑客手段侵入并控制某个网站，然后在服务器上安装并启动一个可由攻击者发出的特殊指令来控制进程，攻击者把攻击对象的IP地址作为指令下达给进程的时候，这些进程就开始对目标主机发起攻击。这种方式可以集中大量的网络服务器带宽，对某个特定目标实施攻击，因而威力巨大，顷刻之间就可以使被攻击目标带宽资源耗尽，导致服务器瘫痪。比如1999年美国明尼苏达大学遭到的黑客攻击就属于这种方式。4、网络监听网络监听是一种监视网络状态、数据流以及网络上传输信息的管理工具，它可以将网络接口设置在监听模式，并且可以截获网上传输的信息，也就是说，当黑客登录网络主机并取得超级用户权限后，若要登录其他主机，使用网络监听可以有效地截获网上的数据，这是黑客使用最多的方法，但是，网络监听只能应用于物理上连接于同一网段的主机，通常被用做获取用户口令。5、密码破解当然也是黑客常用的攻击手段之一。
Tuesday, 24 May 2016
"Lightspeed" redirects here. For other uses, see Speed of light (disambiguation) and Lightspeed (disambiguation).
| |
| Exact values | |
|---|---|
| metres per second | 299792458 |
| Planck length per Planck time (i.e., Planck units) | 1 |
| Approximate values (to three significant digits) | |
| kilometres per hour | 1080 million (1.08×109) |
| miles per second | 186000 |
| miles per hour | 671 million (6.71×108) |
| astronomical units per day | 173[Note 1] |
| Approximate light signal travel times | |
| Distance | Time |
| one foot | 1.0 ns |
| one metre | 3.3 ns |
| from geostationary orbit to Earth | 119 ms |
| the length of Earth's equator | 134 ms |
| from Moon to Earth | 1.3 s |
| from Sun to Earth (1 AU) | 8.3 min |
| one light year | 1.0 year |
| one parsec | 3.26 years |
| from nearest star to Sun (1.3 pc) | 4.2 years |
| from the nearest galaxy (the Canis Major Dwarf Galaxy) to Earth | 25000 years |
| across the Milky Way | 100000 years |
| from the Andromeda Galaxy to Earth | 2.5 million years |
| from Earth to the edge of the observable universe | 46.5 billion years |
The speed of light in vacuum, commonly denoted c, is a universal physical constant important in many areas of physics. Its precise value is 299792458 metres per second (approximately 3.00×108 m/s), since the length of the metre is defined from this constant and the international standard for time.[1] According to special relativity, c is the maximum speed at which all matter and hence information in the universe can travel. It is the speed at which all massless particles and changes of the associated fields (including electromagnetic radiation such as light and gravitational waves) travel in vacuum. Such particles and waves travel at cregardless of the motion of the source or the inertial reference frame of the observer. In the theory of relativity, c interrelates space and time, and also appears in the famous equation of mass–energy equivalenceE = mc2.[2]
The speed at which light propagates through transparent materials, such as glass or air, is less than c; similarly, the speed of radio waves in wire cables is slower than c. The ratio between c and the speed v at which light travels in a material is called the refractive index n of the material (n = c / v). For example, for visible light the refractive index of glass is typically around 1.5, meaning that light in glass travels at c / 1.5 ≈ 200000 km/s; the refractive index of air for visible light is about 1.0003, so the speed of light in air is about 299700 km/s (about 90 km/s slower than c).
For many practical purposes, light and other electromagnetic waves will appear to propagate instantaneously, but for long distances and very sensitive measurements, their finite speed has noticeable effects. In communicating with distant space probes, it can take minutes to hours for a message to get from Earth to the spacecraft, or vice versa. The light seen from stars left them many years ago, allowing the study of the history of the universe by looking at distant objects. The finite speed of light also limits the theoretical maximum speed of computers, since information must be sent within the computer from chip to chip. The speed of light can be used with time of flight measurements to measure large distances to high precision.
Ole Rømer first demonstrated in 1676 that light travels at a finite speed (as opposed to instantaneously) by studying the apparent motion of Jupiter's moon Io. In 1865, James Clerk Maxwell proposed that light was an electromagnetic wave, and therefore travelled at the speed c appearing in his theory of electromagnetism.[3] In 1905, Albert Einstein postulated that the speed of light c with respect to any inertial frame is a constant and is independent of the motion of the light source.[4] He explored the consequences of that postulate by deriving the special theory of relativity and in doing so showed that the parameter c had relevance outside of the context of light and electromagnetism.
After centuries of increasingly precise measurements, in 1975 the speed of light was known to be 299792458 m/s with a measurement uncertainty of 4 parts per billion. In 1983, the metre was redefined in the International System of Units (SI) as the distance travelled by light in vacuum in 1/299792458 of a second. As a result, the numerical value of c in metres per second is now fixed exactly by the definition of the metre.[5]
This article is about artificial satellites. For natural satellites, also known as moons, see Natural satellite. For other uses, see Satellite (disambiguation).
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In the context of spaceflight, a satellite is an artificial object which has been intentionally placed into orbit. Such objects are sometimes called artificial satellites to distinguish them from natural satellites such as Earth's Moon.
The world's first artificial satellite, the Sputnik 1, was launched by the Soviet Union in 1957. Since then, thousands of satellites have been launched into orbit around the Earth. Some satellites, notably space stations, have been launched in parts and assembled in orbit. Artificial satellites originate from more than 40 countries and have used the satellite launching capabilities of ten nations. About a thousand satellites are currently operational, whereas thousands of unused satellites and satellite fragments orbit the Earth as space debris. A few space probes have been placed into orbit around other bodies and become artificial satellites to the Moon, Mercury, Venus, Mars, Jupiter, Saturn, Vesta, Eros, Ceres,[1] and the Sun.
Satellites are used for a large number of purposes. Common types include military and civilian Earth observation satellites, communications satellites, navigation satellites, weather satellites, and research satellites. Space stations and human spacecraft in orbit are also satellites. Satellite orbits vary greatly, depending on the purpose of the satellite, and are classified in a number of ways. Well-known (overlapping) classes include low Earth orbit, polar orbit, and geostationary orbit.
About 6,600 satellites have been launched. The latest estimates are that 3,600 remain in orbit.[2] Of those, about 1,000 are operational;[3][4] the rest have lived out their useful lives and are part of the space debris. Approximately 500 operational satellites are in low-Earth orbit, 50 are in medium-Earth orbit (at 20,000 km), the rest are in geostationary orbit (at 36,000 km).[5]
Satellites are propelled by rockets to their orbits. Usually the launch vehicle itself is a rocket lifting off from a launch pad on land. In a minority of cases satellites are launched at sea (from a submarine or a mobile maritime platform) or aboard a plane (see air launch to orbit).
Satellites are usually semi-independent computer-controlled systems. Satellite subsystems attend many tasks, such as power generation, thermal control, telemetry, attitude control and orbit control.
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