Judul: Identifikasi Faktor–Faktor Yang Memengaruhi Ketepatan Waktu Kelulusan Mahasiswa Program Sarjana Ipb
Abstrak: Persentase lulus tepat waktu setiap perguruan tinggi umumnya lebih kecil dibandingkan dengan persentase lulus tidak tepat waktu. Penelitian sebelumnya menyatakan persentase kelulusan tepat waktu di IPB hanya sebesar 30.94% sedangkan 69.06% lainnya tidak lulus tepat waktu. Ketidaktepatan waktu kelulusan tersebut dapat disebabkan oleh beberapa faktor yang dapat diidentifikasi oleh suatu analisis statistika. Salah satu analisis yang dapat digunakan yaitu analisis regresi logistik biner dengan peubah respon lulus tepat waktu dan lulus tidak tepat waktu. Hasil analisis regresi logistik biner tersebut mengindikasikan bahwa asal fakultas wisudawan, IPK TPB, jenis kelamin wisudawan, beasiswa, jalur masuk dan minor memengaruhi ketepatan waktu kelulusan. Faktor yang paling memengaruhi ketepatan waktu kelulusan adalah fakultas, hasil tersebut sejalan dengan penelitian sebelumnya. Fakultas yang memiliki odds untuk lulus tepat waktu tertinggi yaitu FEM dengan rasio odds sebesar 8.99 yang artinya odds lulus tepat waktu FEM 8.99 kali dibandingkan FAPERTA.
Keyword: analisis regresi logistik biner, faktor-faktor kelulusan, lulus tepat waktu

Judul: Identification of Factors that Affecting the Timeliness of Graduation in FMIPA IPB Class of 2017 Student
Abstrak: Tingkat kelulusan mahasiswa tepat waktu menjadi salah satu kriteria penilaian akreditasi bagi suatu perguruan tinggi atau program studi, semakin banyak mahasiswa yang lulus tepat waktu maka semakin baik pula kinerjanya. Akan tetapi, berdasarkan data lulusan dari DAPPMB IPB, hanya sekitar 37,46% mahasiswa FMIPA angkatan 2016 yang dapat menyelesaikan studi tepat waktu. Data yang digunakan pada penelitian ini berasal dari DAPPMB IPB. Faktor- faktor yang diduga dapat mempengaruhi ketepatan waktu lulus diantaranya adalah jenis kelamin, asal daerah, minor, program studi, jalur masuk, IPK terakhir, dan kestabilan prestasi. Untuk menganalisis faktor-faktor yang berpengaruh terhadap kelulusan mahasiswa digunakan analisis regresi logistik biner menggunakan regresi stepwise dan 10-fold cross validation. Berdasarkan penelitian ini, faktor-faktor yang memengaruhi ketepatan waktu lulus mahasiswa FMIPA IPB angkatan 2017 adalah program studi, minor, IPK terakhir, dan kestabilan prestasi. Model regresi logistik biner yang diperoleh menghasilkan nilai akurasi sebesar 66,75%, sensitivitas 32,65%, spesifisitas 90,69%, dan AUC sebesar 0,75., The graduation timeliness rate of student is one of the criteria for accreditation assessment for a university or study program, the more students who graduate on time, the more better the performance. However, based on graduate’s data from DAPPMB IPB, only around 37.46% of FMIPA students, class of 2016, that can complete their studies on time. The data used in this research is from DAPPMB IPB. Factors that are suspected affect the timeliness of graduation include gender, regional origin, minor, study program, entrance pathway, the last GPA, and the stability of achievement. Binary logistic regression with stepwise regression and 10-fold cross validation was used to analyze factors that affecting student graduation. Based on this research, factors that affect the timeliness of graduation in FMIPA IPB class of 2017 student are study program, minor, the last GPA, and the stability of achievement. The binary logistic regression modeling results show that the accuracy value is 66,75%, sensitivity 32,65%, specificity 90,69%, and an AUC 0,75.
Keyword: binary logistic regression, graduation factors, student graduation

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