Judul: Penerapan Metode Common Reflection Surface (CRS) dan Radon Transform Pada Data Seismik 2D multichannel di perairan Laut Sulawesi.
Abstrak: Penelitian ini bertujuan menerapkan metode CRS dan Transformasi Radon pada data seismik 2D. Data seismik merupakan hasil akuisisi survei geologi laut oleh Pusat Penelitian dan Pengembangan Geologi Laut (PPPGL) pada bulan November 2016 di perairan Laut Sulawesi. Pengolahan data dilakukan dari memasukan data ke dalam sistem (input data) hingga penjumlahan sinyal seismik (stacking), yang kemudian dilanjutkan dengan menerapkan metode CRS dan Transformasi Radon. Metode CRS mengestimasi kecepatan suara melalui pendekatan geometri (α, , dan ) dan Tranformasi Radon mengubah domain seismik ( ) kedalam domain Radon ( ). Hasil pengolahan menunjukan bahwa hasil CRS Stack dapat menghasilkan penampang seismic yang lebih baik daripada stack konvensional. Selain itu, hasil CRS stack dapat dijadikan acuan dalam penentuan batas multiple dan primary dalam transformasi Radon, sehingga pantulan ganda (multiple) dari penampang dapat tereduksi dan mendekati rupa asli penampang.
Keyword: Common Refection Surface, Laut Sulawesi, multiple, stacking, transformasi Radon

Judul: Penerapan Metode Common Reflection Surface (CRS) pada Data Seismik Laut 2D di Laut Flores.
Abstrak: Penelitian bertujuan untuk membandingkan penampang hasil pengolahan data seismik menggunakan stack konvensional dan metode Common Reflection Surface (CRS), dan membuktikan bahwa metode CRS mampu memberikan pencitraan yang lebih baik dibandingkan dengan metode stack konvensional. Penelitian menggunakan satu lintasan data seismik hasil akusisi Pusat Penelitian dan Pengembangan Geologi Kelautan (P3GL) pada Juni 2012 di Laut Flores. Penelitian mengolah data seismik mulai dari input data sampai stack, kemudian dilanjutkan dengan metode CRS. Metode CRS menggunakan beberapa penyesuaian pada aperture. Penampang yang optimal menggunakan dip aperture 300 m dan stack aperture 100 m. Hasil menunjukkan penampang data seismik menggunakan metode CRS mampu memberikan pencitraan yang lebih baik dibandingkan dengan metode stack konvensional. Metode CRS dapat meningkatkan kualitas penampang karena reflektor yang terlihat jelas dan kontinu.
Keyword: Common Reflection Surface, laut, reflektor

Judul: Biology and ecology of the buffalo fly, haematobia exigua de meijere (diptera:muscidae)
Abstrak: The life history of the buffalo fly was observed at room temperature of 27°-29.5°C and at a relative humidity of 48-68 percent. The eggs hatched after 17-22 hours, with an average of 18 hours. First instar larvae measured 1.25 + 0.16 mm long and 0.27 + 0.037 mm wide. reach the second larval stage. It took 6-12 hours to the second instar larvae measured 2.676 +0.187 mm long and 0.353 +0.028 mm wide. The second instar took about 12-24 hours to reach the third larval stage. The third instar measured 6.833 + 0.189 mm long and 0.919 + 0.051 mm wide. It took about 2-3 days for the third instar to become pupae. Duration of the pupal stage was about 5-7 days before the adults emerged. Under laboratory condition, the buffalo fly completed its life cycle in 9.5 to 10.5 days, whereas under field condition it took 9-14 days with an average of 10.5 days. The growth ratio which was based on the measurements of the cephalo-pharyngeal skeleton of each instar was 1.797. The preoviposition period was 8-12 days and mating usually occurred on the 6th or 7th day. The longevity of the male was 29 days, whereas it was 32 days in the female. The range of egg production under laboratory condition was between 20-139 per female fly. The belly and hind legs of the carabao were the most preferred habitat either during cloudy and cool dry or shiny and warm day. When the weather was clear and the carabao was in the shade, the flies tended to be more distributed particularly on the shoulder, dewlap, back and horns. The carabaos had relatively fewer Musca sp. and Stomoxys calcitrans than cattle; never the less carabaos had a higher infestation of buffalo fly than cattle. Oviposition occured either during the day or night but the buffalo flies were more active during the night than in the day time. The effect of various lengths of exposure time of manure in relation to the oviposition was profound. observed, the maximum number of the buffalo flies was occurred when the dung was exposed for 30 minutes. With increasing time of exposure the number and variety of insects also increase. It was evident that Sepsidae and psychodidae were the most dominant insects emerging from the dung. The number of buffalo flies also increased with increasing
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