Judul: Penggunaan sebaran beta majemuk pada consumer price index
Abstrak: Family beta telah digunakan secara ekstensif selama seratus tahun lebih. Sebaran beta pertama kali digambarkan pada interval [0,1] kemudian diperluas menjadi interval yang terbatas. Sebaran beta dapat diterapkan pada hampir setiap bidang. Akan tetapi, sebaran beta lebih banyak digunakan pada bidang ekonomi dan keuangan. Karya ilmiah ini bertujuan untuk membandingkan sebaran beta standar dan sebaran beta majemuk pada Consumer Price Index. Berdasarkan Goodness of fit, sebaran beta standar dan sebaran beta majemuk dapat digunakan pada Consumer Price Index. Hasil uji rasio likelihood menunjukkan bahwa model sebaran beta majemuk lebih baik dari pada model sebaran beta standar.
Keyword: Family Beta, Incomplete Beta Function, Maximum Likelihood estimation

Judul: Sebaran Bivariate Inverse Weibull
Abstrak: Sebaran baru dapat dibangun dari sebaran lain yang telah ada. Salah satu cara yang umum digunakan adalah menggabungkan dua atau lebih sebaran untuk mendapatkan sebaran baru. Pada karya ilmiah ini akan dibahas suatu sebaran baru yaitu sebaran bivariate inverse Weibull yang dibangun dari dua pasang sebaran inverse Weibull yang saling bebas. Menggunakan definisi sebaran maksimum, fungsi sebaran kumulatif bersama dan fungsi kepekatan peluang bersama dari sebaran bivariate inverse Weibull dapat dirumuskan dari fungsi sebaran inverse Weibull. Pendugaan parameter dilakukan dengan metode penduga kemungkinan maksimum dan metode Newton-Raphson. Pembangkitan serangkaian data dengan jumlah yang berbeda menunjukkan data dengan jumlah besar memberikan dugaan yang lebih akurat bagi parameter., A new distribution can be built from already existing distributions. One of the common method is compounding two or more distributions to obtain a new one. This paper will discuss a new distribution that is a bivariate inverse Weibull distribution. This new distribution is built from two pairs of independent inverse Weibull distributions. Using the definition of maximum distribution, the joint cumulative distribution function and the joint probability density function of a bivariate inverse Weibull can be formulated from the inverse Weibull distribution function. Parameter estimation was done using the maximum likelihood method and Newton-Raphson method. Generating several sets of data with different amounts pointed out that a large number data gave more accurate estimates for parameters.
Keyword: bivariate inverse Weibull distribution, maximum distribution, inverse Weibull distribution, maximum likelihood method, Newton-Raphson method

Judul: Hybrid solar cells of ZnO nanoparticles/chlorophyll was modified metal ions (Zn2+ and Cu2+ )
Abstrak: Zinc Oxide (ZnO) is a n-type semiconductor with a wide the energy band (Band Gap) is 3.37 eV at room temperature and 3.34 eV at low temperature with a large exiton binding energy is 60 meV. ZnO has been synthesized by hydrothermal method, resulting in a decrease in particle size over the duration of the hydrothermal changes. Crystallographic structure of ZnO were characterized using XRD, has shown the characteristic pattern of a hexagonal wurtzite structure, the crystallite size increases to changes in particle size. Changes in particle size has also led to a change in the absorption peak of ZnO as has been demonstrated posted under test using the optical properties of UV-Vis spectrophotometer. Changes of this uptake has also led to changes in the energy band gap, which increases its band gap energy of the particle size. In electronic applications, especially in solar cells. Chlorophyll is considered less effective, because of their very nature are easily degraded as a result of several reactions which are acid, lighting and temperature. The results of the stability test using a halogen lamp 34 W/m2 for 5 hours, that the substitution of chlorophyll with metal ions Zn2+ and Cu2+ has been shown to form more stable than natural chlorophyll. The characterization of the optical properties, the combination of ZnO / chlorophyll in the form of hybrid films has led to a shift in the absorption region of ZnO becomes more widely from the UV to Visible. ZnO/chlorophyll has absorption range of 350-515 nm, ZnO / Zn-feofitin 332-401 nm and 332-632 nm for Cu-feofitin. The combination of ZnO/chlorophyll and CuSCN as a solid electrolite in hybrid solar cell, a modified chlorophyll with metal ions Zn2+ and Cu2+ has been shown to form a more stable I-V curve. It is characterized by its fill factor value greater than natural chlorophyll. Nevertheless, solar cells with natural chlorophyll has been able to produce higher efficiency values of chlorophyll were substituted.
Keyword: Hydrothermal, ZnO/Chlorophyll modified, Hybrid Solar Cell