Judul: Pengembangan Metode Pencitraan Electrical Resistivity Tomography Menggunakan Konfigurasi Wenner -Schlumberger: Kasus Anomali Dalam Tanah
Abstrak: Metode Electrical Resistivity Tomography (ERT) adalah salah satu metode yang dapat mengukur sifat kelistrikan material di bawah permukaan yang didasarkan pada nilai resistivitas material dengan cara menginjeksikan arus listrik dan mengukur potensialnya di permukaan tersebut. Penelitian yang berjudul Pengembangan Metode Pencitraan Electrical Resistivity Tomography Menggunakan Konfigurasi Wenner -Schlumberger: Kasus Anomali dalam Tanah adalah penelitian yang berskala laboratorium dan telah dilakukan di Laboratorium Elektronika Departemen Fisika Institut Pertanian Bogor. Penelitian ini bertujuan untuk melakukan pengembangan sebuah konfigurasi baru yakni konfigurasi Wenner -Schlumberger dimana Pengujian yang dilakukan adalah dengan membuat sebuah sistem bak kayu dengan ukuran (120 cm x 30 cm x 20 cm) yang berisi tanah sebagai tanah homogen. Selain itu, sistem akan diberikan tiga buah anomali (kayu, batu, dan tanah berair) yang diletakkan pada posisi yang berbeda sehingga terdapat beberapa variasi resistivitas yang akan dideteksi. Dengan adanya pengujian konfigurasi baru ini, akan dilakukan juga pengukuran dengan konfigurasi Wenner-Schlumberger dimana dapat dijadikan sebagai data pembanding untuk pengukuran konfigurasi Wenner -Schlumberger. Berdasarkan hasil data yang diperoleh didapat bahwa pembacaan data potensial listrik dengan menggunakan konfigurasi Wenner -Schlumberger dapat mengatasi kekurangan pada konfigurasi Wenner-Schlumberger yaitu didapat potensial listrik yang cenderung membesar seiring diperbesarnya jarak spasi antarelektroda. Selain itu, hasil yang didapat menggunakan konfigurasi Wenner -Schlumberger menghasilkan resolusi citra ERT yang lebih jelas dibandingkan dengan konfigurasi Wenner-Schlumberger dalam mendeteksi nilai resistivitas sebenarnya dari sistem dan anomali serta posisi dari ketiga anomali tersebut. Hal ini terlihat dari nilai error yang didapat yakni menggunakan konfigurasi Wenner -Schlumberger didapat nilai error 6,2 % sedangkan menggunakan konfigurasi Wenner-Schlumberger didapatkan nilai error 10,1 %.
Keyword: ERT, Wenner-Schlumberger, Optimalisasi potensial, Anomali, Res2dinv

Judul: Uji konduktivitas listrik terhadap kadar air tanah dramaga Bogor dengan metode wenner dan sifat fisik tanahnya
Abstrak: Have been research about method of electromagnetic measurement with four electrode system of Wenner configuraton to determine electrical conductivity of buried and also relation to the water content which consisted. Characterization physical properties, like : Bulk Density, porosity, aggregate stability, mineral content, and texture also soif chemical properties of buried to determine micro and macro element. Measurement electrical conductivity is conducted with variation of deepness of electrode 5 cm, I0 cm , and 15 cm at the same time with intake of sampel of land then measured water content with gravimetric methode. Soil sampie also taken to be analysed by content of mineral with microscope and content of element by AAS ( Atomic Absorbtion Spectrometry).
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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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