Harga Paket Umroh Murah Promo November By Saudi Airlines

saco-indonesia.com, Petir adalah peristiwa alam yang sering terjadi di bumi, terjadinya seringkali mengikuti peristiwa hujan baik air atau es, peristiwa ini telah dimulai dengan munculnya awan hitam dan lidah api listrik bercahaya terang yang bergerak merambat terus memanjang kearah bumi bagaikan sulur akar dan kemudian diikuti oleh suara menggelegar dan efeknya juga akan sangat fatal bila mengenai mahluk hidup.
PROSES TERJADINYA PETIR

Terdapat 2 teori yang mendasari proses terjadinya petir :

    Proses Ionisasi
    Proses Gesekan antar awan

a. Proses Ionisasi
Petir telah terjadi diakibatkan oleh terkumpulnya ion bebas bermuatan negatif dan positif di awan, ion listrik dihasilkan oleh gesekan antar awan dan kejadian Ionisasi ini telah disebabkan oleh perubahan bentuk air mulai dari cair menjadi gas atau sebaliknya, bahkan perubahan padat (es) telah menjadi cair dan pada tahap pembekuan ini mencapai suhu dibawah 0 derajat yaitu antara -10 sampai -14 derajad celcius
Ion bebas telah menempati permukaan awan dan bergerak mengikuti angin berhembus, bila awan-awan telah terkumpul di suatu tempat maka awan bermuatan akan memiliki beda potensial cukup besar untuk dapat menyambar permukaan bumi maka inilah yang disebut petir.

b. Gesekan antar awan
Pada awalnya awan akan bergerak mengikuti arah angin, selama proses bergeraknya awan ini maka akan saling bergesekan satu dengan yang lainnya , dari proses ini terlahir electron-electron bebas bermutan negatif yang telah memenuhi permukaan awan. proses ini bisa digambarkan secara sederhana pada sebuah penggaris plastik yang digosokkan pada rambut maka penggaris ini akan mampu menarik potongan kertas.
Pada suatu saat awan ini akan terkumpul di sebuah kawasan, saat inilah petir dimungkinkan telah terjadi karena electron-elektron bebas ini telah saling menguatkan satu dengan lainnya. Sehingga telah memiliki cukup beda potensial untuk dapat menyambar permukaan bumi. kedua teori ini mungkin juga masuk akal meski kejadian sebenarnya masih merupakan sebuah misteri.
PERLINDUNGAN TERHADAP BAHAYA PETIR

Manusia selalu mencoba untuk dapat menjinakkan keganasan alam,atau setidaknya menghidarinya, salah satunya adalah Sambaran Petir. dan metode yang pernah dikembangkan:
1. Penangkal Petir Kovensional / Faraday / Frangklin
Kedua ilmuan diatas Faraday dan Frangklin telah mengetengahkan system yang hampir sama , yakni system penyalur arus listrik dengan menghubungkan antara bagian atas bangunan dan grounding. Sedangkan system perlindungan yang telah dihasilkan ujung penerima / Splitzer adalah sama pada rentang 30 ~ 45 ‘ . Perbedaannya adalah system yang telah dikembangkan oleh Faraday bahwa Kabel penghantar terletak pada sisi luar bangunan dengan pertimbangan bahwa kabel penghantar juga berfungsi sebagai penerima sambaran, dan bentuknya Berupa sangkar elektris atau biasa disebut sangkar Faraday.
2. Penangkal Petir Radio Aktif
Penelitian terus terus berkembang dan dihasilkan kesimpulan bahwa petir telah terjadi karena ada muatan listrik di awan dihasilkan oleh proses ionisasi , maka penggagalan proses ionisasi di lakukan dengan cara memakai Zat beradiasi misl. Radiun 226 dan Ameresium 241 , karena 2 bahan ini juga mampu menghamburkan ion radiasinya yang bisa menetralkan muatan listrik awan.
Sedang manfaat lain adalah hamburan ion radiasi akan dapat menambah muatan pada Ujung Finial / Splitzer dan bila mana awan yang bermuatan besar tidak mampu di netralkan oleh zat radiasi kemudian menyambar, maka akan condong mengenai unit radiasi ini .
Keberadaan penangkal petir jenis ini juga sudah dilarang pemakaiannya , berdasarkan kesepakatan internasional dengan pertimbangan mengurangi pemakaian zat beradiasi dimasyarakat yang disinyalir mempunyai efek negatif pada lingkungan hidup dan kesehatan.
3. Penangkal Petir Elektrostatic
Prinsip kerja penangkal petir Elektrostatik adalah dengan mengadopsi sebagian system penangkal petir Radioaktif , yakni dengan menambah muatan pada ujung finial / splitzer agar petir selalu memilih ujung ini untuk disambar .
Perbedaan dari sisten Radioaktif dan Elektrostatik ada pada energi yang dipakai. Untuk Penangkal Petir Radioaktif muatan listrik dihasilkan dari proses hamburan zat beradiasi sedangkan pada penangkal petir elektrostatik energi listrik dihasilkan dari Listrik Awan yang menginduksi permukaan bumi.
CARA KERJA PENANGKAL PETIR NEOFLASH

Mekanisme Kerja
Ketika awan bermuatan listrik telah melintas diatas sebuah bangunan yang terpasang penangkal petir neoFlash, maka elektroda penerima pada bagian samping NeoFLASH ini dapat mengumpulkan dan menyimpan energi listrik awan pada unit kapasitornya . Setelah energi ini cukup besar maka dilepas dan diperbesar beda potensialnya pada bagian Ion Generator.
Pelepasan muatan listrik pada unit Ion Generator ini di picu oleh sambaran, yakni ketika lidah api menyambar permukaan bumi maka semua muatan listrik di bagian ion generator dilepaskan keudara melalui Central Pick Up agar menimbulkan lidah api penuntun keatas ( Streamer leader ) untuk dapat menyambut sambaran petir yang terjadi kemudian menuntunya masuk kedalam satu titik sambar yang terdapat unit Neoflash ini.
Kerja Simultan
Pada unit Penangkal Petir NEOFLASH secara simultan bekerja bergantian dari masing-masing unit penerima induksi , jumlahnya tergantung dari tipe dan modelnya. Bekerjanya secara bergantian dimana bila salah satu bagian unit melepaskan muatan ke udara / streamer maka ada bagian lain yang dalam proses pengisian muatan awan.
Tentu akurasi dan kemampuan Penangkal Petir NeoFlash masih tergantung dari 2 hal pendukung instalasi, yaitu:
1. Kabel Penghantar harus minimal 50 mm
2. Grounding maksimal 5 Ohm
Bila 2 syarat pendukung ini juga sudah terpenuhi maka kemampuan penangkal petir neoflash akan maksimal.
ISTILAH PENANGKAL PETIR & ANTI PETIR

Penangkal Petir dan Anti Petir mungkin itu adalah istilah yang sudah salah kaprah dalam bahasa kita, kesan yang ditimbulkan dua istilah ini adalah aman 100 % terhadap petir, akan tetapi kejadiannya tidak demikian.
Dalam penanganan bahaya petir memang ada beberapa faktor yang sangat mempengaruhi, bilamana kita ingin solusi/penyelesaian total akan bahaya petir, kita harus melihat faktor faktor tersebut.
Sambaran Tidak langsung pada bangunan yakni ketika sambaran mengenai obyek diluar areal perlindungan dari penangkal petir yang terpasang , kemudian arus petir ini akan merambat melalui instalasi listrik , kabel data atau apa saja mengarah ke bangunan. Akhirnya hentakan tegangan dan arus merusak unit peralatan listrik / elektronik kita.
Masalah ini juga semakin runyam disaat ini karena banyak peralatan elektronik dengan menggunakan tegangan kerja kecil , DC , dan sensitif, Khususnya di urusan data transfer.
Maka pada dasarnya pengaman sambaran petir langsung / Eksternal penangkal petir bukan membuat posisi kita aman 100 % terhadap petir, akan tetapi membuat posisi bangunan kita terhindar dari kerusakan fatal akibat sambaran Langsung, serta meminimalisir efek kerusakan pada peralatan elektronik bila ada sambaran menyambar bangunan kita.
mungkin Penyalur Arus Petir adalah istilah tepatnya.
Masih ada kemungkinan lain yakni sambaran petir tidak langsung , yakni sambaran yang pada dasarnya tidak mengenai lokasi bangunan tetapi mengenai jauh diluar lokasi tetapi lonjakan listriknya merambat masuk ke jaringan instalasi listrik di bangunan dan merusak peralatan elektronik, Untuk penanganan sambaran petir tidak langsung dapat digunakan Arrester yakni perangkat yang bisa memotong dan membelokkan lonjakan arus / tegangan petir ke dalam grounding .


Editor : Dian Sukmawati

CARA KERJA PENANGKAL PETIR

Over the last five years or so, it seemed there was little that Dean G. Skelos, the majority leader of the New York Senate, would not do for his son.

He pressed a powerful real estate executive to provide commissions to his son, a 32-year-old title insurance salesman, according to a federal criminal complaint. He helped get him a job at an environmental company and employed his influence to help the company get government work. He used his office to push natural gas drilling regulations that would have increased his son’s commissions.

He even tried to direct part of a $5.4 billion state budget windfall to fund government contracts that the company was seeking. And when the company was close to securing a storm-water contract from Nassau County, the senator, through an intermediary, pressured the company to pay his son more — or risk having the senator subvert the bid.

The criminal complaint, unsealed on Monday, lays out corruption charges against Senator Skelos and his son, Adam B. Skelos, the latest scandal to seize Albany, and potentially alter its power structure.

Photo
 
Preet Bharara, the United States attorney in Manhattan, discussed the case involving Dean G. Skelos and his son, Adam. Credit Eduardo Munoz/Reuters

The repeated and diverse efforts by Senator Skelos, a Long Island Republican, to use what prosecutors said was his political influence to find work, or at least income, for his son could send both men to federal prison. If they are convicted of all six charges against them, they face up to 20 years in prison for each of four of the six counts and up to 10 years for the remaining two.

Senator Kenneth P. LaValle, of Long Island, who serves as chairman of the Republican conference, emerged from a closed-door meeting Monday night to say that conference members agreed that Mr. Skelos should be benefited the “presumption of innocence,” and would stay in his leadership role.

“The leader has indicated he would like to remain as leader,” said Mr. LaValle, “and he has the support of the conference.” The case against Mr. Skelos and his son grew out of a broader inquiry into political corruption by the United States attorney for the Southern District of New York, Preet Bharara, that has already changed the face of the state capital. It is based in part, according to the six-count complaint, on conversations secretly recorded by one of two cooperating witnesses, and wiretaps on the cellphones of the senator and his son. Those recordings revealed that both men were concerned about electronic surveillance, and illustrated the son’s unsuccessful efforts to thwart it.

Advertisement

Adam Skelos took to using a “burner” phone, the complaint says, and told his father he wanted them to speak through a FaceTime video call in an apparent effort to avoid detection. They also used coded language at times.

At one point, Adam Skelos was recorded telling a Senate staff member of his frustration in not being able to speak openly to his father on the phone, noting that he could not “just send smoke signals or a little pigeon” carrying a message.

The 43-page complaint, sworn out by Paul M. Takla, a special agent for the Federal Bureau of Investigation, outlines a five-year scheme to “monetize” the senator’s official position; it also lays bare the extent to which a father sought to use his position to help his son.

The charges accuse the two men of extorting payments through a real estate developer, Glenwood Management, based on Long Island, and the environmental company, AbTech Industries, in Scottsdale, Ariz., with the expectation that the money paid to Adam Skelos — nearly $220,000 in total — would influence his father’s actions.

Glenwood, one of the state’s most prolific campaign donors, had ties to AbTech through investments in the environmental firm’s parent company by Glenwood’s founding family and a senior executive.

The accusations in the complaint portray Senator Skelos as a man who, when it came to his son, was not shy about twisting arms, even in situations that might give other arm-twisters pause.

Seeking to help his son, Senator Skelos turned to the executive at Glenwood, which develops rental apartments in New York City and has much at stake when it comes to real estate legislation in Albany. The senator urged him to direct business to his son, who sold title insurance.

After much prodding, the executive, Charles C. Dorego, engineered a $20,000 payment to Adam Skelos from a title insurance company even though he did no work for the money. But far more lucrative was a consultant position that Mr. Dorego arranged for Adam Skelos at AbTech, which seeks government contracts to treat storm water. (Mr. Dorego is not identified by name in the complaint, but referred to only as CW-1, for Cooperating Witness 1.)

Senator Skelos appeared to take an active interest in his son’s new line of work. Adam Skelos sent him several drafts of his consulting agreement with AbTech, the complaint says, as well as the final deal that was struck.

“Mazel tov,” his father replied.

Senator Skelos sent relevant news articles to his son, including one about a sewage leak near Albany. When AbTech wanted to seek government contracts after Hurricane Sandy, the senator got on a conference call with his son and an AbTech executive, Bjornulf White, and offered advice. (Like Mr. Dorego, Mr. White is not named in the complaint, but referred to as CW-2.)

The assistance paid off: With the senator’s help, AbTech secured a contract worth up to $12 million from Nassau County, a big break for a struggling small business.

But the money was slow to materialize. The senator expressed impatience with county officials.

Adam Skelos, in a phone call with Mr. White in late December, suggested that his father would seek to punish the county. “I tell you this, the state is not going to do a [expletive] thing for the county,” he said.

Three days later, Senator Skelos pressed his case with the Nassau County executive, Edward P. Mangano, a fellow Republican. “Somebody feels like they’re just getting jerked around the last two years,” the senator said, referring to his son in what the complaint described as “coded language.”

The next day, the senator pursued the matter, as he and Mr. Mangano attended a wake for a slain New York City police officer. Senator Skelos then reassured his son, who called him while he was still at the wake. “All claims that are in will be taken care of,” the senator said.

AbTech’s fortunes appeared to weigh on his son. At one point in January, Adam Skelos told his father that if the company did not succeed, he would “lose the ability to pay for things.”

Making matters worse, in recent months, Senator Skelos and his son appeared to grow wary about who was watching them. In addition to making calls on the burner phone, Adam Skelos said he used the FaceTime video calling “because that doesn’t show up on the phone bill,” as he told Mr. White.

In late February, Adam Skelos arranged a pair of meetings between Mr. White and state senators; AbTech needed to win state legislation that would allow its contract to move beyond its initial stages. But Senator Skelos deemed the plan too risky and caused one of the meetings to be canceled.

In another recorded call, Adam Skelos, promising to be “very, very vague” on the phone, urged his father to allow the meeting. The senator offered a warning. “Right now we are in dangerous times, Adam,” he told him.

A month later, in another phone call that was recorded by the authorities, Adam Skelos complained that his father could not give him “real advice” about AbTech while the two men were speaking over the telephone.

“You can’t talk normally,” he told his father, “because it’s like [expletive] Preet Bharara is listening to every [expletive] phone call. It’s just [expletive] frustrating.”

“It is,” his father agreed.

Dean Skelos, Albany Senate Leader, Aided Son at All Costs, U.S. Says

Artikel lainnya »