Judul: Analisis biplot untuk memetakan mutu sekolah yang sesuai  dengan nilai ujian nasional
Abstrak: Mutu sekolah dalam bidang akademik biasanya dikaitkan dengan nilai Ujian Nasional, sedangkan nilai tersebut hanya digunakan sebagai acuan untuk menentukan kelulusan siswa. Sebagai tindak lanjut, nilai Ujian Nasional dapat dianalisis untuk mendapatkan informasi lain dalam hubungannya dengan peningkatan mutu sekolah. Pemetaan mutu sekolah merupakan suatu proses untuk memperoleh gambaran mutu sekolah yang sesuai dengan nilai Ujian Nasional dan peubahpeubah yang mempengaruhinya. Dalam statistika dikenal suatu analisis data yang menganalisis secara serempak peubah amatan lebih dari satu, yaitu Analisis Peubah Ganda. Salah satu teknik yang digunakan adalah pereduksian dimensi data peubah ganda. Analisis Peubah Ganda yang menggunakan teknik ini antara lain ialah Analisis Komponen Utama dan Analisis Biplot.
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Judul: Analisis Biplot untuk Memetakan Provinsi Berdasarkan Prestasi Mahasiswa TPB IPB dan Nilai Ujian Nasional
Abstrak: Quality description of schools in academic field is supposed to be seen from attainment of national exam (UN) score. Students’ achievement in college can be described with acquisition of high GPA. Provincial mapping can be used to obtain a description of its position in accordance with the achievement of UN score and students’ achievement in college. The data used in this study for provincial mapping are TPB IPB students’ achievement in 2007/2008 academic year. Provincial mapping is conducted by using biplot analysis. Preliminary data exploration is conducted by using boxplot, GPA-UN plot, and Pearson’s correlation matrix. The correlation between UN score and GPA, which is 0.41**, is highly significant but not large enough to measure successfulness in college. In this study, biplot analysis can explain 74.56% of data variability. Based on the proximity among provinces and the interrelationship of provinces with variables used, these provinces can be grouped into nine groups. This grouping is expected to provide informations on advantages and disadvantages of each province in order to improve its educational quality.
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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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