Judul: Perbaikan dan evaluasi kinerja algoritma read-commit order concurrency control (ROCC)
Abstrak: Concurrency control (CC) merupakan suatu mekanisme untuk mengatur eksekusi transaksi-transaksi yang terjadi dalam basis data. CC data produk komersial menggunakan Strict Two Phase Locking (Strict 2PL). Strict 2PL masih mempunyai masalah yang disebut dengan deadlock. Lead-commit Order Concurrency Control (ROCC) merupakan sauatu CC baru yang diharapkan dapat memberikan kerja yang tinggi dan memperbaharui CC yang telah ada.
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Judul: Perbandingan manajemen locking antara basic two phasee locking dan strict two phase locking
Abstrak: Transaksi dalam basis data dapat dipandang sebagai sekumpulan operasi read dan write yang memanipulasi data. Pada basis data dengan banyak pengguna (multi-user), transaksi dapat dieksekusi secara simultan. Basis data dengan banyak pengguna dapat menyebabkan transaksi-transaksi yang datang mengalami konflik. Dua transaksi dikatakan konflik jika satu atau lebih operasinya mengakses data item yang sama dan setidaknya salah satu dari operasi tersebut adalah operasi write. Untuk mengatasi hal tersebut dibutuhkan suatu mekanisme concurrency control yang berperan dalam mengatur transaksi-transaksi yang datang secara simultan sehingga basis data tetap konsisten. Dengan menerapkan mekanisme locking, sebuah data item tidak dapat diakses oleh suatu transaksi jika data item tersebut telah terkunci oleh transaksi lain. Penelitian ini bertujuan untuk membandingkan dua buah algoritma Manajemen Locking yaitu Basic Two Phase Locking (Basic 2PL) dan Strict Two Phase Locking (Strict 2PL) yang diterapkan dalam sistem basis data terpusat (single server). Perbandingan dilakukan dengan menggunakan program simulasi komputer untuk melihat kinerja kedua algoritma ditinjau dari selang waktu kedatangan transaksi dan prosentase operasi read dan operasi write dari transaksi yang dibangkitkan. Melalui penelitian ini dapat diketahui bahwa semakin besar prosentase operasi write dari transaksi- transaksi yang datang ke Lock Manager menyebabkan delay time semakin besar dan throughput semakin kecil.
Keyword: manajemen locking, basis data

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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