Virus jadi Batere? Apa bisa?

Posted on April 7, 2009
Filed Under Teknologi | Leave a Comment

Virus

Jangan kaget, walaupun memang cukup mengherankan. Sebuah penelitian di Massachussets Institute of Technology atau yang dikenal MIT telah merekayasa sebuah virus yang dapat dijadikan batere. Jika berhasil, batere ini akan menjadi yang paling ramah lingkungan.

Konon, batere ini dapat dipergunakan untuk perangkat elektronik mungil sepereti mp3 player, handphone, dan sebagainya. Di masa depan, mereka juga akan dapat dipakai untuk memotori mobil. Virus M13 yang dipakai untuk membuat batere ini hanya menginfeksi bakteri, jadi tidak berbahaya untuk manusia.

Penemuan ini merupakan pengembangan dari sebuah riset yang dilakukan tiga tahun lalu ketika tim MIT secara genetika telah membentuk virus-virus yang dapat membangun sebuah anoda dengan cara melapisi dirinya dengan kobalt oksida dan emas dan membangun dirinya sendiri untuk membentuk sebuah nanowire. Batere biasa memiliki dua anoda, satu terminal positif (seringkali dibuat dari kobalt dioksida) dan sebuah terminal negatif (seringkali terbuat dari grafit).

Para peneliti MIT melakukan riset tersebut dan berfokus pada pembangunan sebuah katoda yang dapat dipasangkan dengan anoda. Tugas ini tidak mudah, tetapi pada akhirnya para ilmuwan dapat membuat virus-virus yang melapisi dirinya sendiri dengan besi fosfat, lalu menempel ke carbon nanotubes untuk menciptakan sebuah jaringan dari bahan yang amat konduktif. Elektron-elektron dapat berjalan di sepanjang carbon nanotubes ke jaringan besi fosfat dengan sangat mudah, yang berarti mentransfer energi dalam waktu yang amat singkat.

Dengan menggunakan pengembangan ini, para peneliti telah menciptakan batere berukuran koin. Menurut uji lab, batere ini bisa diisi ulang dan digunakan minimal 100x tanpa mengurangi kapasitasnya. Memang daya tahan siklus pengisiannya masih kalah dibandingkan batere Li-ion, tetapi diharapkan batere ini bisa bertahan lebih lama.

Online survey

Posted on November 23, 2008
Filed Under Ekonomi, Komputer & Internet | 1 Comment

Online survey is one of the way to get money in the internet. It’s very easy as you write a survey and you’ll be paid for every sentences you made.

One of the fastest growing paid survey website is A.W. Survey.

First you joined they will pay you $6. And you will be served for surveys which value $4 dollar for each survey.

Try it!

Understanding Web Hosting

Posted on November 20, 2008
Filed Under Komputer & Internet, Uncategorized | 1 Comment

If you want to own a website, then you have to definitely think about web hosting too. A website contains a collection of web pages and can be referred as computer files which usually contains text files and pictures. These files will have to be stored in a super computer along with high speed internet connection. These computers are known as servers. All your files will be put on the servers. It is the web hosting providers who provide such services. It is the web hosting company who are responsible to host your website. The servers which contain the files are located in a particular place called data center. A data center is in the form of a room or a building. It is here were fast internet connection to servers is provided. It also provides security entrance, fire protection, electricity backup etc. One must understand that a server is quite different from a personal computer. A personal computer may have 1 processor, 1 hard disk drive and 1 power supply but a powerful server will usually have 2 or more processor. This facilitates the server to work faster and process more applications at the same time. Hence, websites are always hosted on servers and not on personal computers.


You don’t have to invest huge money on endure technical issues in order to build and maintain your web hosting infrastructure. In a traditional hosting account, you would be allowed to host only 1 domain per hosting account. This would be considered as a waste of your money because most of the time you will not be using more than 10% of your given disk space and bandwidth. This will happen because hosting accounts today usually come with very large disk space and bandwidth. It will be unfair to still pay more for more domains when you have plenty of disk space left. So, I must say that the future of web hosting can be related to multiple domain hosting. By using multiple domains hosting, you are actually making full use of your disk space and bandwidth.

In today’s times, the most common level of web hosting is shared hosting or so called “virtual hosting”. Based on the speed of the server, it can easily host more than 1000 websites without any problem. In this case, the users who are using the same server will share the same resources of it. Example: disk space, bandwidth, memory etc. This technique makes the hosting affordable because you end up paying only a portion of the server fee instead of the entire server. It is estimated that over 95% of websites of the internet are usually hosted on shared hosting environment. There is also another concept of so called “dedicated server” where you can choose to rent the entire server for your own use. Also, there are times when you can share a server with another user and this means that you are using a semi dedicated server. In the case of a managed hosting which is also called as dedicated hosting, you will rent the server from the web host. You are not the owner of the server. If you choose to buy a server instead of renting it then you will have to place it in a data center. It all depends upon your web hosting requirement.

Web Hosting Geeks

Keep Health with Peace Fruit

Posted on November 20, 2008
Filed Under Kesehatan | 1 Comment

Peace atau buah mengkudu tidak sulit ditemukan di daerah-daerah pedesaan di Indonesia. Banyak masyarakat desa yang menanam buah mengkudu di pekarangan-pekarangan rumah, sayangnya mereka tidak benar-benar tahu khasiat apa yang bisa diperoleh dari buah mengkudu sehingga buah-buah mengkudu yang telah matang dibiarkan berjatuhan dan membusuk begitu saja.

Belum ada pengumuman resmi dari badan kesehatan yang menerangkan khasiat yang dimiliki buah mengkudu. Namun, dari tradisi yang berakar turun temurun ternyata buah mengkudu dapat meredakan penyakit-penyakit seperti:

Berikut beberapa resep yang bisa dilakukan untuk mengolah buah mengkudu:

Buah mengkudu muda dibuat jus dengan cara diblender bersama air masak secukupnya. Untuk penambah rasa, bisa dibubuhi sedikit madu. Diminum 30 menit sebelum sarapan.

Khasiatnya untuk membersihkan endapan lemak darah, sehingga dapat menyembuhkan aterosklerosis dan stroke, serta mencegah serangan jantung Dapat membatasi penyerapan lemak, konsumsi dan pembentukan lemak di dalam tubuh, sehingga dapat membantu program pelangsingan. Selain itu dapat menurunkan tekanan darah tinggi dan meredakan pikiran tegang dan stress, gelisah dan rasa tak nyaman.

Buah mengkudu matang dihaluskan, campur dengan rimpang lempuyang parut, dan beberapa sendok makan air masak. Peras kemudian diminum.

Berkhasiat untuk mengobati sakit kuning karena peradangan hati, radang ginjal, dan radang limpa karena serangan malaria Membantu membuang cairan empedu dan kolesterol berlebihan. Menyembuhkan radang saluran kencing, yang disebut anyang-anyangan (kencing sedikit-sedikit dan terasa nyeri).

Buah mengkudu matang yang telah dihaluskan dicampur dengan rimpang lengkuas parut, dan beberapa sendok makan air panas. Peras, lalu diminum. Untuk penambah rasa, bisa dibubuhi madu atau gula batu.

Berkhasiat untuk menurunkan demam karena flu dan masuk angin, terutama pada anak-anak, mengobati radang tenggorokan dan radang amandel.

Buah mengkudu juga dapat membantu meringankan penyakit-penyakit di bawah ini:

Tobacco

Posted on November 19, 2008
Filed Under Kesehatan | Leave a Comment

Tobacco is an agricultural product, recognized as an addictive drug, processed from the fresh leaves of plants in the genus Nicotiana. Tobacco has long been in use as an entheogen. However at the arrival of the Europeans, it quickly became popularized as a trade item and as a recreational drug. This popularization led to the development of the southern economy of the United States until it gave way to cotton. Following the American Civil War, a change in demand and a change in labor force allowed for the development of the cigarette. This new product quickly led to the growth of tobacco companies until the scientific controversy of the mid-1900s.

The leaves of tobacco plant are dried and crumbled. The crumbled tobacco is used in pipes, cigars, and cigarettes which are smoked. Snuff is tobacco ground into a fine powder that is inhaled through the nostrils or held against the gums. Chewing tobacco is made from poor quality leaves mixed with honey. It is chewed and then the leaves and juices are spat out.

Tobacco smoke contains the psychoactive alkaloids nicotine and harmane, which combined give rise to addictive stimulant and euphoriant properties. The effect of nicotine in first time or irregular users is an increase in alertness and memory, and mild euphoria. Nicotine also disturbs metabolism and suppresses appetite. This is because nicotine, like many stimulants, temporarily increases blood sugar levels.

Medical research has determined that tobacco smoking causes lung cancer, emphysema, and cardiovascular disease among other health problems. The World Health Organization reported that tobacco smoking killed 100 million people worldwide in the 20th century and warned that it could kill one billion people around the world in the 21st century.

Today, hundreds of thousands die each year from diseases related to smoking tobacco. Many adults still smoke. Most smokers would love to quit, but tobacco smoking is habit forming. Once a person starts smoking, it is difficult to stop. The way tobacco and snuff have been in fashion at various times in history. In all its forms, tobacco is a dangerous enemy.

Music

Posted on November 19, 2008
Filed Under Elektronik & Multimedia, Serba-serbi | Leave a Comment

Music is an art form in which the medium is sound organized in time. Common elements of music are pitch (which governs melody and harmony), rhythm (and its associated concepts tempo, meter, and articulation), dynamics, and the sonic qualities of timbre and texture. The word derives from Greek ?(mousike), “(art) of the Muses“.[1]

The creation, performance, significance, and even the definition of music vary according to culture and social context. Music ranges from strictly organized compositions (and their recreation in performance), through improvisational music to aleatoric forms. Music can be divided into genres and subgenres, although the dividing lines and relationships between music genres are often subtle, sometimes open to individual interpretation, and occasionally controversial. Within “the arts“, music may be classified as a performing art, a fine art, and auditory art.

To people in many cultures, music is inextricably intertwined into their way of life. Greek philosophers and ancient Indians defined music as tones ordered horizontally as melodies and vertically as harmonies. Common sayings such as “the harmony of the spheres” and “it is music to my ears” point to the notion that music is often ordered and pleasant to listen to. However, 20th-century composer John Cage thought that any sound can be music, saying, for example, “There is no noise, only sound.”[2] According to musicologist Jean-Jacques Nattiez, “the border between music and noise is always culturally defined—which implies that, even within a single society, this border does not always pass through the same place; in short, there is rarely a consensus.… By all accounts there is no single and intercultural universal concept defining what music might be, except that it is ’sound through time’.”

wikipedia.com

Kinds of Cactus

Posted on November 19, 2008
Filed Under Alam kita | Leave a Comment

Desert Cactus

We can name the following desert cactus species: ariocarpus, carnegiea, cephalocereus, cephaloceus, echinocactus, ferocactus, opuntia, and some others.

When we hear the word ‘desert’ we usually imagine the Sahara with its scorching sand-dunes devoid of any vegetation. But the soil of stony deserts in Central and South America is very rich in all the necessary salts for cacti.

But if rains are extremely rare here, where does the water comes from? The answer is there are plentiful dews, falling at night.

Roots of many cacti living in these places are radish-shaped and are capable of saving water within. To reduce moisture evaporation, cacti aspire to curtail the area of the stalk surface. That’s why they have either spherical or a short cylindrical form.

Desert cactus types are not afraid of the burning sun.

For their correct development desert types of cactus require much sun, and careful watering. They can easily die because of water stagnation in the ground even during summer heat.

Savanna Cactus

The word savanna usually means vast territories of grass plains. Its distinctive features are a long dry period without rain in the winter and spring, and plentiful rain and thunderstorms in the summertime. Fluctuations in temperature reach 20°C and more.

Such climate is considered to be the most favorable for cactus types growing on these plains. The most popular of them are coryphanta and mammillaria. These types of cactus excellently bear the dry and cool winter and need a lot of warmth, sun and watering in the summer, but they are afraid of water stagnation near their roots.

Mountain Cactus

Have you ever been to or have you ever seen the pictures of the Andes or the Cordilleras? These are the places of such cactus types as astrophytum, cleistocactus, echinopsis, lobivia, notocactus, oreocereus, rebutia and others. Forbidding rocks rise above stony gorges. It seems incredible how they survive: during the daytime they are scorched by the bright and merciless sun and at night they freeze in the cold mountain air. These types of cactus would die, if they had no means of protection as attire of fuzz, prickles and setae. The dense woolly cover protects the green stalk from sunburns and supercooling.

If you keep these cactus types dry and cold (3-5°?) in winter and give them enough sunlight in summer, they will grow excellently and blossom even at a young age.

Seashore Cactus

Here belongs species such as melocactus, copiapoa and some others.

Growing just by the sea, very close to the surfs, such types of cactus as melocacti are sometimes washed and taken away by the water.

The roots of seashore cacti extend far under the surface of sand ground to gather more fresh rainwater. All year long these cacti need warmth (about 20°C) and humid air; therefore it’s extremely difficult to grow them as houseplants. They prefer mainly sand soil with an admixture of loam and humus, and they can’t bear alkali soil.

Rainforest Cactus

Have you ever heard about such cactus types as epiphyllum, rhipsalis or schlumbergera? Sure, you have. These epiphytic cacti of rainforests grow in moist and sultry woods on forks of branches, in hollows and on stubs. They settle on leaf humus, so their roots are short, but very branchy and clutch at any crack or a ledge on a tree bark. These cactus plants grow all year long, because there are no seasons of droughts and colds in the rainforests.

Thick leaves always cover these types of cactus from the sun, causing shading, that’s why they don’t need to have such means of protection against overheat of the stalk like a thick skin, a wax bloom or fuzz.

Epiphytic cactus types grow in damp atmosphere and they have no need at all to save water. They absorb it from the moist air around thanks to a bulk of stomae on their wide stalks. They are bare and unprotected and need warmth and moisture the whole year round.

Cacti for plural use and Cactus for general are the specific plants of the Cactaceae family. The Cactaceae are the biggest existing family of the tender cactus plants. There are around 2000 recognized types of cactus species in the world, especially in the regions of Central, South, and North America. A huge amount of cactuses, but not entire, are fine habitant to the desert climatic conditions, utilizing their trunks for accumulation of water during long durational dry seasons. Several various cactus species of the barrel cacti shares the bodily attributes of a bony layered barrel shaped trunk. In terms of comparison, several types of the cactus species of barrel are of average length of about 4-10 feet. This physical feature makes the barrel cacti tinier than the huge columnar cactus and bigger than the pincushion cactus species. The barrel cacti mostly stand as a lone trunk cacti rather than huddled in factions, with blooms on the top. The barrel cactus species are one of the most admired countryside species of the cactus family.

Major Species:

One of the major distinctive cactus species is the Claret Cup cactus with attractive reddish and cup shaped flowers. This particular cactus species illustrates the tale behind the actual name of the cactus family. The shades and the surface between the stream and the remaining plant, makes it a popular snappy cactus species for several people residing in its habitant, mostly in the southern regions of the deserts in the extreme Southwest extending from California to Texas. Certain landscapers and garden keepers also admire utilizing it as a hummingbird cactus. This is because a wide range of hummingbird species such as the Magnificent, Black-chinned hummingbird, and the Broad-tailed hummingbird nourishes on the Claret cup cactus flower nectar and assists it in pollination process. Basically, the Claret cup cactus species is a small and spiny cactus that most often nurtures in groups of trunks. Another most admired cactus species is the Organ pipe cactus that are big grooved cactus that nurtures frequently in groups representing the organ pipes. The organ pipe cactus is inhabitant of the Sonoran Desert area of the Southern Arizona and Northern Mexico. One unique features of this cactus species is that they are nighttime bloomers and are mostly pollinated by bats.

Other Secondary Species:

The name of Pincushion is provided to loads of cactus species existing in the world. The Pincushion cactus is a tiny circular plant with small thorns. It appears as if someone has fussed pins in a cushion. The Pincushion cacti are quite adjustable types of cactus nurturing in an array of habitations. In the year of 1986, Arizona, the Pincushion cactus was declared as one of the endangered species of the cactus family.

How to make money online?

Posted on August 2, 2008
Filed Under Ekonomi, Serba-serbi, Tips & Trik | Comments Off

Dollar demi Dollar bisa kita raih dengan hanya sedikit kerja kerasBanyak dari para pengguna internet tidak menyadari bahwa aktivitasnya di dunia maya adalah sesuatu yang mungkin bagi orang lain memberi keuntungan (benefit). Misalkan Anda membuka yahoo.com, di halaman depan saja ktia sudah disodorkan beberapa banner iklan. Yahoo mendapatkan ribuan, ratusan mungkin jutaan dolar dari iklan tersebut, keuntungan dari kita adalah semakin kita sering membuka situs tersebut maka semakin besar nilai yahoo di mata pemasang iklan sehingga mereka tidak merasa rugi membayar mahal untuk memasang iklan di situs tersebut.

Dari

Ditemukan Bangkai Kapal Perang Inggris Tahun 1780

Posted on July 1, 2008
Filed Under Arkeologi | Leave a Comment

LONDON, SABTU - Para penyelam bawah laut mengumumkan penemuan bangkai kapal perang HMS Ontario yang tenggelam tahun 1780 setelah mencari selama tiga tahun. Kapal milik angkatan laut Inggris tersebut ditemukan di daerah Great Lakes, perbatasan AS dan Kanada.

Bangkai kapal ditemukan pemburu bangkai kapal Jim Kennard dan Dan Scoville di kedalaman 152 meter dan hanya dapat dicapai oleh penyelam berpengalaman. Mereka menggunakan alat pemindai sonar dan kapal selam mini tak berawak untuk mencari bangkai kapal tersebut.

Kapal sepanjang 24,4 meter dan dilengkapi 22 meriam itu tenggelam pada sebuah pertempuran 31 Oktober 1780. Sebanyak 130 orang diperkirakan ikut tenggelam di dalamnya, masing-masing 60 tentara Inggris, 40 kru dari Kanada, dan 30 tawanan perang dari Amerika.

Lokasi bangkai kapal saat ini masih dirahasiakan. Hanya disebutkan bahwa bangkai kapal berada di dekat pantai bagian selatan. Belum ada rencana untuk mengangkat bangkai kapal tersebut dan memindahkan artifak yang dibawanya.

HMS Ontario mungkin bangkai kapal perang Inggris tertua yang pernah ditemukan di perairan Amerika Utara. Bahkan, ia mungkin bangkai kapal yang ditemukan dalam kondisi utuh.

“Untuk menemukan kapal perang yang digunakan di masa revolusi dalam kondisi utuh hampir mustahil,” ujar Arthur Britton Smith, penulis sejarah dari Kanada yang menulis sejarah HMS Ontario dalam bukunya The Legend of the Lake tahun 1997. Ia menyebut temuan ini sebagai salah satu keajaiban arkeologi.

Betapa tidak, meski tersangkut di perairan yang berarus deras, kapal tersebut tidak mengelami kerusakan berarti. Scoville mengatakan terdapat dua jendela yang tidak rusak sama sekali. Air laut yang dingin dengan kadar kadar cahaya dan oksigen rendah mungkin menjaga ketahanan bangkai kapal tersebut.

HMS Ontario dikenal sebagai salah satu kapal perang yang terkemuka. Namun, para pemburu telah mencari bangkai kapal tersebut selama bertahun-tahun namun selalu tanpa hasil.

BBC

Makhluk Ekstrim Hidup 1,6 Kilometer di Bawah Tanah

Posted on July 1, 2008
Filed Under Biologi | 1 Comment

Para ilmuwan menemukan organisme renik yang hidup 1,6 kilometer di bawah dasar laut di pantai Newfoundland, Kanada. Temuan ini makin menguatkan pendapat bahwa makhluk-makhluk bersel tunggal mungkin sanggup hidup di lingkungan sangat ekstrim di planet lain.

“Ini mungkin bukan hanya paling dalam namun juga organisme paling panas yang ditemukan jauh di endapan laut,” ujar R John Parkes, seorang pakar geobiologi dari Universtas Cardiff, Wales, Inggris yang melaporkan temuannya dalam jurnal Science edisi terbaru. Meski bakteri juga pernah ditemukan di sebuah tambang emas Afrika Selatan pada kedalaman 2 kilometer, rekor organisme di endapan laut sebelumnya di kedalaman 842 meter.

Makhluk hidup bersel tunggal yang baru ditemukan ini mungkin memeroleh energi dari gas methan. Gas tersebut terjebak dalam lapisna batuan yang berumur 111 juta tahun dan suhunya antara 60-100 derajat Celcius.

“Tidak ada cahaya sama sekali, dan tidak ada oksigen di sana,” ujar Parkes. Tempat hidupnya benar-benar lapisan batuan meskipun masih ada kandungan air.

Makhluk hidup seperti inilah yang mungkin masih hidup jauh di bagian tersembunyi planate-planet berbatu serupa Bumi, misalnya Mars. Wahana tanpa awak milik NASA, Phoenix Mars Lander, yang baru mendarat di Mars, Senin (26/5) pagi WIB, tengah mencari bukti-bukti es di bawah permukaan Mars yang mungkin mendukung kehidupan semacam ini.

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