Judul: Variabilitas Curah Hujan dan Produktivitas Jambu Mete di Kabupaten Muna dan Wonogiri
Abstrak: Cashew crop production is influenced by climate, one of which is by precipitation. This research was conducted to study the effect of rainfall variability in cashew crop production in Muna, Southeast Sulawesi and Wonogiri, Central Java, which are the center of cashew crop production in Indonesia. The results of the analysis in this study concluded that the rainfall anomalies are negatively correlated with the productivity of cashew crop in the two districts. Thus, an increase in rainfall anomalies can lead to decreased productivity, and vice versa. Cross-correlation analysis showed the highest correlation between productivity to rainfall at the flowering period in August in Muna and March in Wonogiri. The relationship between rainfall and sea surface temperature anomalies in Niño 3.4 was highest occurred at lag 0 in Muna and at lag 2 in Wonogiri.
Keyword: productivity., rainfall, cashew crop

Judul: Pengaruh curah hujan terhadap fenologi beberapa jenis tanaman buah-buahan di tiga tempat di Jawa Tengah
Abstrak: Fenologi adalah ilmu pengetahuan yang menghubungkan dengan kejadian kejadian periodik pada kehidupan iklim tanaman dan hewan. Berdasarkan masa berbunga dan berbuahnya, ada dua kelompok tanaman buah-buahan, yaitu yang bersifat musiman dan tidak musiman. Salah satu faktor yang besar penga- ruhnya terhadap keberhasilan pengusahaan tanaman buah- buahan adalah keadaan iklim yang meliputi keadaan hujan, letak tinggi tempat dari permukaan laut dan air tanah. Beberapa pustaka menyebutkan bahwa terdapat jenis tanaman buah-buahan yang memerlukan periode kering tertentu untuk merangsang pembungaannya. Penelitian ini mencoba untuk mengetahui fenologi lima jenis tanaman buah-buahan yang terdiri dari mangga, manggis, duku, durian dan rambutan, serta hubungannya dengan curah hujan dan hari hujan, mengetahui periode kering yang diperlukan untuk merangsang pembungaannya serta pengaruh pergeseran awal musim kemarau terhadap pergeseran awal musim panennya. Penelitian ini sepuluh tahun (1979 menggunakan data sekunder selama 1988) di tiga lokasi di daerah Jawa Tengah, yaitu Stasiun Iklim Seneng Banyurojo (Magelang), Ngipiksari (Yogyakarta) dan Karang Kemiri (Purbalingga). -
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Judul: Photosensor producing based on ferroelectric material of Ba0,5Sr0,5TiO3 doped by Ferrium Oxide (Fe2O3) on a P-Type Silicon Substate Si (100) applied as a digital camera with a single pixel image sensor
Abstrak: Thin film Ba0,5Sr0,5TiO3 (BST) doped with Fe2O3 was grown on p-type silicon substrate (100) using chemical solution deposition (CSD). It used the solvent 2-methoxyethanol with annealing temperature of 850°C and the doping treatment Fe2O3 of 2.5, 5, 7.5, 10 % of the mass formed BST. Pure BST had the highest absorption of 600 nm of light wavelength. Additions Fe2O3 moves highest absorption in the range of 560 nm. Fe2O3 addition was strengthening thin film sensitivity to the effects of light. In general, doping Fe2O3 10% was result the best absorbance and current-voltage of BST thin film. Electrical properties of thin films BST include dielectric, photoconductivity, and dissipation energy. Based on the current-voltage (I-V) analysis, pure BST and doped BST showed photodiode properties. Dielectric values obtained in the range from 23.32 to 243. Based on electrical conductivity data and energy dissipation, BST thin films have shown photodiode characteristics and are therefore suitable as light sensors. The image sensor in a digital camera is also a light sensor. This BST thin film has been scientifically proven to be a light sensor and also it can be applied as an image sensor. This is a novelty image sensor based on thin film Ba0.5Sr0.5TiO3.
Keyword: barium strontium titanate, thin film, photodiode, image sensor, digital camera