Judul: Regresi Terboboti Geografis untuk Analisis Pendapatan Asli Daerah Kabupaten/kota di Provinsi Aceh
Abstrak: Original Local Government Revenue (PAD) is one of the important sources of income that has to be used optimally in order to decrease the dependency aid towards the central government and the provincial government. PAD of a regency/municipality in Aceh are influenced by spatial dependence and spatial heterogenity. Spatial dependence and spatial heterogenity can be overcome by using Geographically Weighted Regression (GWR). GWR models with Gaussian kernel weighted grouped regency/municipality in Aceh into seven groups based on the independent variables associated with the PAD of a regency/municipality. Overall, the independent variables associated with PAD of a regency/municipality in Aceh are the total population, the number of hotels, the number of tourist attraction, the number of large and medium industries, per capita GRDP, and the number of tourists. Variables that have the highest contribution to the PAD of a regency/municipality in Aceh are the number of hotels, number of tourist attraction, and the number of large and medium industries. The R2 value of the overall GWR models is 83.81%, while the R2 value of the GWR models for each regency/muncipality ranges from 73.17%-85.89%
Keyword: GWR, kernel Gaussian, PAD

Judul: Analisis Regresi Terboboti Geografi Dengan Pembobot Kernel Kuadrat Ganda Tetap (Studi Kasus: Pad Kabupaten/Kota Di Jawa Tengah)
Abstrak: Keheterogenan spasial adalah suatu masalah yang sering muncul dalam melakukan pemodelan statistik akibat adanya perbedaan lokasi. Oleh karena itu diperlukan suatu pemodelan yang memperhatikan faktor lokasi amatan. Analisis regresi terboboti geografi (RTG) adalah suatu metode statistika yang mengatasi masalah keheterogenan spasial. Model RTG mampu mengidentifikasi peubahpeubah yang bersifat lokal dengan pembobotan berdasarkan posisi amatan di suatu lokasi. Penelitian ini bertujuan untuk menentukan model RTG bagi Pendapatan Asli Daerah (PAD) di Jawa Tengah tahun 2013 sehingga dapat mengetahui peubah yang berpengaruh terhadap PAD tiap kabupaten/kota dengan pembobot Kernel kuadrat ganda tetap dan membandingkan kebaikan model RTG dengan model regresi linier berganda. Penelitian ini menghasilkan 35 model PAD yang berbeda untuk setiap kabupaten/kota di Jawa Tengah. Penggunaan peta tematik menunjukkan bahwa Provinsi Jawa Tengah terbagi menjadi 5 kelompok berdasarkan peubah penjelas yang berpengaruh secara nyata terhadap PAD. Pemodelan dengan RTG juga terbukti lebih baik dalam mengatasi keheterogenan spasial. Model RTG mampu menghasilkan koefisien determinasi (R2) yang lebih besar, nilai Akaike Information Criterion (AIC) yang lebih kecil serta nilai Kuadrat Tengah Galat (KTG) yang lebih kecil dibanding dengan pemodelan regresi linier berganda.
Keyword: keheterogenan spasial, Pendapatan Asli Daerah, regresi terboboti geografi

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