Judul: Karakteristik lulusan S1 statistika Institut Pertanian Bogor (Studi kasus pada alumni angkatan 31-35)
Abstrak: Salah satu hal yang melatarbelakangi penelitian ini yaitu masih banyaknya tenaga kerja yang belum memiliki kemampuan yang memadai dilihat dari banyaknya lulusan-lulusan perguruan tinggi yang belum memiliki pekerjaan. Penelitian ini bertujuan untuk memperoleh informasi mengenai karakteristik lulusan S1 Departemen Statistika Institut Pertanian Bogor khususnya pada angkatan 31-35 serta melihat keterkaitan antar karakteristik lulusan.
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Judul: Pola hubungan statistik prestasi mahasiswa pada berbagai tingkat dan jurusan di Institut Pertanian Bogor
Abstrak: Lulusan SLTA yang diterima di IPB umumnya berasal dari berbagai lingkungan kehidupan keluarga, kebudayaan, sosial ekonomi, dan genetika yang berbeda. Perbedaan ini menyebabkan pola nalar mereka berbeda sehinnga hasil belajar merekapun berbeda ketika mengikuti perkuliahan di TPB. Berdasarkan latar belakang tersebut, maka tujuan penelitian ini adalah untuk mendapatkan gambaran mengenai pola nalar mahasiswa serta menemukan hubungan antara prestasi akademik di TPB, dengan pola prestasi akademik sepanjang mengikuti program studi setelah di fakultas hinggga lulus menjadi sarjana. Penguraian secara ra deskriptif diharapkan dapat memberikan informasi mengenai prasyarat apa yang harus diperhatikan mahasiswa. Agar dapat memilih program studi yang sesuai dengan pola daya nalar yang dimilikinya, dan selanjutnya akan berguna bagi yang memerlukan. ...
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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