Judul: Biplot Data Disagregat dan Agregat dalam Pemetaan Provinsi Berdasarkan Prestasi Mahasiswa IPB
Abstrak: Tidak meratanya pembangunan di Indonesia mengakibatkan tidak meratanya tingkat kesejahteraan masyarakatnya, hal ini juga terjadi pada dunia pendidikan. Pembangunan pendidikan di Indonesia dirasakan tidak merata, kondisi ini berimbas kepada mutu pendidikan yang tidak merata. Pembangunan sarana prasarana lebih terfokus di provinsi tertentu. Untuk menjawab apakah benar mutu pendidikan di Indonesia hanya terfokus di provinsi tertentu diperlukan upaya pemetaan di bidang pendidikan. Pemetaan merupakan salah satu upaya untuk memperoleh gambaran mutu sekolah yang sesuai dengan prestasi. Pemetaan selalu melibatkan banyak data, data yang digunakan dapat berupa data disagregat dan data agregat yang dapat menghasilkan hasil dan kesimpulan yang berbeda.
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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: Toksisitas Kontak dan Efek Fumigan Minyak Atsiri Cinnamomum spp. (Lauraceae) terhadap Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae)
Abstrak: One of the stored product pests which can reduce the quantity and quality of stored products is the flour beetle Tribolium castaneum. Stored-product pests are commonly controlled by fumigation and surface spraying using contact insecticides which can cause various harmful side effects. Essential oils of Cinnamomum spp. constitute safer alternatives for controlling stored product pests. This research was done to determine the contact toxicity and fumigant effect of essential oils of eight species of Cinnamomum and a commercial cassia oil against T. castaneum. A commercial insecticide containing alpha-cypermethrin was included for comparison. Only a commercial cassia oil had a fairly strong contact and fumigant effect, i.e. the treatment with 5% cassia oil caused 75% and 70% mortality, respectively. The other test essential oils were not active to weakly active against T. castaneum. Cassia oil and alpha-cypermethrin acted fairly fast, i.e. test insect mortality mostly occurred at 24 hours after treatment (HAT) and in the next 48 hours only a slight increase in insect mortality was noted. LC50 of cassia oil at 72 hours after treatment by contact and fumigant method was 4.73% and 3.12% respectively. Alpha-cypermethrin had relatively weak lethal effect by contact method and no fumigant effect at concentrations up to 10% but had strong knockdown effect at 5% and 10% by contact method.
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