Judul: Analisis Pengaruh Investasi, Tenaga Kerja, dan Infrastruktur Terhadap Pertumbuhan Ekonomi Provinsi Jawa Barat
Abstrak: Economic growth is one indicator of development success in an area. This study is to analyze the effect of investment, work labour, and infrastructure to economic growth in West Java during the period 1990-2011. This study using time series data of 1990-2011 and it’s utilizes regression analysis of Ordinary Least Square (OLS) and supporting software from Eviews 6 and Minitab. The results of this study indicate that the independent variables FDI, domestic investment, and work labour has a positive and significant relationship to economic growth. It is also found that road length has a negative and significant relationship to economic growth, while government expenditure has not significant effect. Increased of local revenues by goverment should be done with create a conducive invesment climate so that the realization of infrastructure improvements can be accomplished, expanding employment opportunities, and boost government spending to improve the economy of West Java Province
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Judul: Analisis Peran Infrastruktur Terhadap Pertumbuhan Ekonomi Provinsi Jawa Barat
Abstrak: Penyediaan infrastruktur merupakan hal yang sangat penting dalam tahap pembangunan. Infrastruktur memberikan kontribusi terhadap perekonomian daerah dan meningkatkan pembangunan ekonomi dengan memberikan efek langsung maupun tidak langsung. Tujuan penelitian ini adalah untuk menjelaskan perkembangan infrastruktur yang ada di Jawa Barat dan menganalisis peran infrastruktur terhadap pertumbuhan ekonomi di Provinsi Jawa Barat. Analisis ini menggunakan data panel dengan model fixed effect yang menggunakan data di 26 kabupaten / kota Provinsi Jawa Barat dalam kurun waktu 2007-2011. Variabel yang digunakan dalam penelitian ini adalah Produk Domestik Regional Bruto (PDRB) sebagai pengukuran output, panjang jalan (km), jumlah energi listrik terjual (KWh), dan jumlah air bersih yang tersalurkan (m3 ). Hasil menunjukkan bahwa infrastruktur di Jawa Barat terus meningkat. Berdasarkan model dalam analisis, infrastruktur jalan, listrik dan air bersih memiliki efek yang positif dan kontribusi yang signifikan pada pertumbuhan ekonomi daerah dimana infrastruktur listrik memberikan kontribusi terbesar terhadap perekonomian daerah di Provinsi Jawa Barat.
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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