Judul: Studi Pelacakan Alumni Jurusan Statistika IPB
Abstrak: Penelitian ini bertujuan untuk menelusuri infonnasi mengenai alumni JUlUsan Statistika IPB yang meliputi profil alumni, keterkaitan antara peubah-peubah, dan saran untuk JUlUsan Statistika IPB. Studi pelacakan ini menggunakan metode survei dengan pengiriman kuesioner melalui pos, e-mail, dan langsung. Alumni yang disurvei adalah alumni yang merni1iki data terakhir (tahun 1998-2001) yang dipilih melalui penarikan contoh purpasive.
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Judul: Penggunaan analisis statistik deskriptif pada penelusuran latar belakang penjurusan di FMIPA IPB
Abstrak: Masalah yang sering timbul saat penjurusan program studi adalah melimpahnya peminat terhadap program studi tertentu yang menyebabkan ketatnya daya saing, sedangkan di pihak lain ada program studi yang kekurangan peminat. Akibatnya tidak sedikit mahasiswa yang terpaksa dilimpahkan ke program studi lain yang kekurangan peminat. Hal ini akan membangkitkan perasaan kecewa pada mahasiswa yang disisihkan ke program studi yang tidak diminatinya. Penulis mencoba melihat masalah di atas pada program- program studi yang ada di FMIPA. Untuk itu penulis telah menyebarkan kuesioner kepada mahasiswa Tingkat Persiapan yang diterima di FMIPA pada tahun 1988. Usaha pendekatan yang dilakukan bersifat studi eksploratif berupa tabulasi silang dan grafik-grafik serta dengan bantuan analisa korespondensi. Dari hasil pengelompokkan berdasarkan kriteria kelebihan atau kekurangan peminat dan proses seleksi masing- masing program studi, Staistika masuk ke dalam Kelompok I, yaitu kelompok penyisih, sedangkan Biologi dan Agromet masuk ke dalam Kelompok III atau kelompok penerima sisihan. ...
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Judul: Hybrid solar cells of ZnO nanoparticles/chlorophyll was modified metal ions (Zn2+ and Cu2+ )
Abstrak: Zinc Oxide (ZnO) is a n-type semiconductor with a wide the energy band (Band Gap) is 3.37 eV at room temperature and 3.34 eV at low temperature with a large exiton binding energy is 60 meV. ZnO has been synthesized by hydrothermal method, resulting in a decrease in particle size over the duration of the hydrothermal changes. Crystallographic structure of ZnO were characterized using XRD, has shown the characteristic pattern of a hexagonal wurtzite structure, the crystallite size increases to changes in particle size. Changes in particle size has also led to a change in the absorption peak of ZnO as has been demonstrated posted under test using the optical properties of UV-Vis spectrophotometer. Changes of this uptake has also led to changes in the energy band gap, which increases its band gap energy of the particle size. In electronic applications, especially in solar cells. Chlorophyll is considered less effective, because of their very nature are easily degraded as a result of several reactions which are acid, lighting and temperature. The results of the stability test using a halogen lamp 34 W/m2 for 5 hours, that the substitution of chlorophyll with metal ions Zn2+ and Cu2+ has been shown to form more stable than natural chlorophyll. The characterization of the optical properties, the combination of ZnO / chlorophyll in the form of hybrid films has led to a shift in the absorption region of ZnO becomes more widely from the UV to Visible. ZnO/chlorophyll has absorption range of 350-515 nm, ZnO / Zn-feofitin 332-401 nm and 332-632 nm for Cu-feofitin. The combination of ZnO/chlorophyll and CuSCN as a solid electrolite in hybrid solar cell, a modified chlorophyll with metal ions Zn2+ and Cu2+ has been shown to form a more stable I-V curve. It is characterized by its fill factor value greater than natural chlorophyll. Nevertheless, solar cells with natural chlorophyll has been able to produce higher efficiency values of chlorophyll were substituted.
Keyword: Hydrothermal, ZnO/Chlorophyll modified, Hybrid Solar Cell