Musik dan Matematika (Music and Math)

Adakah hubungannya? Menurut studi yang dilakukan oleh California State University – Fullerton, hubungannya positif. Menurut studi tersebut, nilai hasil ujian SAT (Scholastic Aptitude Test, ujian masuk Universitas di AS) bagian matematika bisa digunakan untuk memprediksi apakah seorang calon musisi akan sukses atau tidak.
Hasil studi ini mungkin tidak terlalu mengejutkan. Seperti kita ketahui, Albert Einstein adalah seorang pemain Violin yg baik. Ahli Fisika lainya, Edward Teller, juga seorang pemain piano yang mahir. Donald Knuth, ahli Computer Science, juga terkenal sebagsi pemain organ dan composer yang hebat. Dan lainnya.

Makanya waktu anak saya mulai keranjingan main gitar, tidak seperti kebanyakan orang tua lainnya, saya kok tenang2 saja. Memang sih, seperti yang ditakutkan kebanyakan orang tua, pelajaran anak bisa terganggu. Tapi, dalam hal anak saya, dia basically a straight ‘A’ student (terutama MAtematika), or close to that. Walau memang ada les tambahan, di rumah praktis dia jarang belajar. Selama dia masih bisa mempertahankan nilai above average ini, kenapa saya harus komplain? Apa lagi main gitarnya lumayan bagus, terutama untuk anak yang baru berumur 11 menjelang 12 tahun. At least dia bisa menghibur saya dengan memainkan lagu2 lama seperti Burn – Deep Purple atau Stairway to Heaven – Led Zepplin, disamping tentunya favorit dia sekarang : Avenged Seven Fold. Not bad! Not bad at all!

Pernah nge-band sih, tapi sayang vocalistnya kurang baik (lihat video link dibawah ini):

Unholy Confession
Unholy Confession Revisited
London
Synyster Solo
Heal The World

Paradox in Game Theory: Losing Strategy That Wins

Cukup mind boggling. 2 strategi yg teoritis adalah strategi yg akan kalah (expected return negatif), jika dikombinasikan bisa menghasilkan strategi yg teoritis akan menang (expected return positif).
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A Spanish physicist has discovered what appears to be a new law of nature that may help explain, among other things, how life arose out of a primordial soup, why President Clinton’s popularity rose after he was caught in a sex scandal, and why investing in losing stocks can sometimes lead to greater capital gains.

Unfortunately, these tactics won’t work at the casino.

Called Parrondo’s paradox, the law states that two games guaranteed to make a player lose all his money will generate a winning streak if played alternately.

Named after its discoverer, Dr. Juan Parrondo, who teaches physics at the Complutense University in Madrid, the newly discovered paradox is inspired by the mechanical properties of ratchets — the familiar saw-tooth tools used to lift automobiles and run self-winding wristwatches. By translating the properties of a ratchet into game theory — a relatively new scientific discipline that seeks to extract rules of nature from the gains and losses observed in games — Dr. Parrondo discovered that two losing games could combine to increase one’s wealth.
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Paul Krugman vs. John Cochrane

By Alex Parets (Seeking Alpha)
September 14, 2009

Paul Krugman stirred up a lot of conversation in the blogosphere and in the Ivory Tower recently with his NY Times article on the state of macroeconomics. Will has done a very good job covering Krugman’s piece and John Cochrane’s response for this blog. I wanted to throw my unsolicited two cents out there and engage the pieces that have been written.

I agree with Will and John Cochrane that Krugman is using his recently awarded Nobel Prize, along with his tenured, endowed Princeton professorship and his NY Times blog and column to push a partisan agenda and has been quite misleading in many of his writings as of late (which Will also covered here). Many of the claims/arguments he puts forward in the NY Times article are not well informed, incoherent, at times disingenuous and some even border on personal attacks on well-intentioned economists.

However, I do believe that if he wants to turn himself into a money-making political hack, that’s his business. I don’t see anything wrong with him using his column and Nobel fame to convince others that Keynesian economics is the answer to all of the world’s problems; I just wish he was more honest as he goes about it.

Cochrane does a good job calling out Krugman for the mistakes in his article and taking him to task for personally attacking other economists. He also provides a very good defense of mathematical economics, model creation and assumption building.

His arguments for using advanced mathematics as a way of checking and proving logical arguments is quite good. He’s right in that there are things we can’t do with prose that can be done quite well with math, economics being one of them.
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Danareksa Siapkan 3 Reksa Dana Baru

Kamis, 10/09/2009 05:51 WIB
Angga Aliya ZRF – detikFinance

Jakarta – PT Danareksa Investment Management berencana menerbitkan tiga produk reksa dana terproteksi dan dua reksa dana saham baru mulai bulan depan hingga hingga akhir tahun 2009.

Menurut Presiden Direktur Danareksa Investment Managements John D Item, anak usaha PT Danareksa (Persero) itu sudah mendapat tawaran dari tiga nasabah yang menyatakan siap membeli ketiga produk tersebut.

“Totalnya mencapai Rp 2 triliun. Sekarang kita lagi nego yield dan harga,” katanya usai buka puasa bersama di Gedung Danareksa, Jalan Medan Merdeka Selatan, Jakarta, Rabu (9/9/2009) malam.

Salah satu produk yang akan diluncurkan bulan depan itu bernama Danareksa Melati Optima XI, dengan jangka waktu tiga atau lima tahun. Penyertaaan minimal untuk produk tersebut sebesar Rp 1 juta.

“Kita harapkan bisa dapat dana lebih dari Rp 500 miliar dari produk itu,” ungkapnya.

Ia mengatakan, reksa dana terproteksi masih memegang peranan besar dalam total dana kelolaan anak usaha perusahaan plat merah itu, yaitu sebanyak 55 persen.

Hingga akhir Agustus, total dana kelolaan perseroan mencapai Rp 5,2 triliun. Dengan adanya tambahan dana dari ketiga produk ini, ia optimistis dana kelolaan perseroan bisa meningkat sampai Rp 7 triliun di akhir tahun 2009.

Selain reksa dana terproteksi, pihaknya juga berencana menerbitkan dua produk reksa dana saham yang diperkirakan meluncur bulan November 2009.
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