Judul: Factors identification of stop study ipb graduate students using logistic regression and zero inflated poisson
Abstrak: Bogor Institute of Agriculture (IPB) make every effort to increase quality of graduates and percentage of students passing rate. Quality of graduates can be viewed based on the value of GPA and graduation time. Passing rate can be calculated from the ratio of the number of graduates to the number of students in one class. Students stopped the study is one issue that is still a concern because can harm their own students, institutions, and the country. In this research will examine the factors that affect graduate students IPB stop study. The first study in terms of the status of the students stop studies using logistic regression. The second study in terms of the number of occurences of students who stopped the study in each course using Poisson regression. Poisson regression model on the discrete data of the type that sometimes occurs overdispersi value greater variety from the average value. In general, the model can be used for data overdispersi is a zero inflated Poisson regression. The data used in this research were graduate students of data generation IPB 2005- 2010. Based on the results of logistic regression analysis states that male student has the opportunity to stop the study was higher than women, the graduate students coming from PTS have the opportunity to stop the study is higher than those from PTN, students with tuition fee independent source has the opportunity to stop the study was higher than the students receiving scholarship and students are not linear S1 has a chance to stop the study was higher than that of linear S1. Evaluation study conducted by program of study by using zero inflated Poisson regression to model the log shows that the smaller the percentage of married students, an average GPA of S1, and the greater the percentage of students receiving scholarships will increase the number of graduate students who stop his studies while IPB. Logit models showed IPB graduate students opportunities stop study is influenced by the percentage of male students, the percentage of married students, the percentage of college country of origin, and the percentage of scholarship recipients.
Keyword: stop study, logistic regression, zero inflated poisson regression

Judul: Evaluasi Capaian Akademik Mahasiswa  Sekolah Vokasi IPB Menggunakan Regresi Logistik Biner Multilevel
Abstrak: Sekolah Vokasi IPB didirikan pada tahun 1979. Program diploma ini memiliki visi menjadi Sekolah Vokasi yang terdepan dan berkelas Internasional. Tercapainya tujuan tersebut dapat dilihat dari indeks prestasi kumulatif setiap mahasiswa. Oleh karena itu, penelitian ini mencatat data nilai IPK setiap mahasiswa setiap tahunnya. Data ini disebut data longitudinal dan cara melakukan pemodelannya adalah menggunakan model regresi linier multilevel. Eksplorasi data peubah respons pada penelitian ini menunjukkan tidak berdistribusi normal sehingga salah satu solusinya adalah dengan membuat model regresi logistik biner multilevel. Oleh karena itu, penelitian ini bertujuan membangun model regresi logistik biner multilevel pada data siswa Sekolah Vokasi IPB dan menduga komponen ragam IPK mahasiswa Sekolah Vokasi IPB. Hasil model yang terbentuk menunjukkan bahwa faktor-faktor yang memengaruhi IPK pada level satu adalah semester dan SKS per semester, kemudian pada level dua adalah jenis kelamin, jalur masuk, dan status beasiswa. Model terbaik mencakup ragam intersep acak pada tingkat mahasiswa dan tingkat program studi. Selain itu, model terbaik juga menunjukkan ragam kemiringan acak semester pada tingkat mahasiswa serta semester dan jalur masuk pada tingkat program studi., IPB Vocational School was established in 1979. This diploma program aims to become a leading and international-class Vocational School. The achievement of this goal can be seen in each student's cumulative grade point average. Therefore, this study records the GPA value data for each student every year. This data is called longitudinal data, and the way to do the modeling is using the multilevel linear regression model. The data exploration of the response variable in this study shows that it is not normally distributed, so one of the solutions is to make a multilevel binary logistic regression model. Hence, this research aims to build multilevel binary logistic regression model on IPB Vocational School student data and estimate the variance components of IPB Vocational School students' GPA. The results of the model formed show that the factors that influence GPA on level one are semester and credits per semester, and then on level two, they are gender, entry route, and scholarship status. The best model included the variance of random intercept on the student level and study program level. It also shows the variance of random slopes of semesters at the student level as well as semester and entry route at the study program level.
Keyword: binary logistic regression, GPA, longitudinal data, multilevel regression, study achievement

Judul: Karakteristik Anatomi Skelet Tubuh Buaya Senyulong (Tomistoma schlegelii)
Abstrak: Buaya senyulong (Tomistoma schlegelii) merupakan buaya besar yang rentan punah dan hanya dapat ditemukan di rawa dataran rendah, danau dan sungai di Sumatera bagian timur, Kalimantan dan Jawa Barat (Indonesia), Serawak, Semenanjung Malaysia (Malaysia) serta Brunei Darussalam. Tujuan dari penelitian ini adalah mempelajari karakteristik anatomi skelet tubuh buaya senyulong yang dikaitkan dengan fungsi dan perilakunya. Penelitian ini menggunakan satu set preparat skelet tubuh buaya senyulong. Parameter penelitian meliputi pengamatan bentuk bagian skelet yang khas, mengukur panjang dan lebar tulang, serta dibandingkan dengan skelet tubuh jenis buaya lain, biawak air (Varanus salvator) maupun literatur yang terkait dengan sistem skelet tubuh hewan. Karakteristik anatomi skelet tubuh buaya senyulong relatif mirip pada jenis buaya lain. Beberapa karakteristik yang ditemukan yaitu, proatlas pada os atlas, os axis hanya memiliki zygapophysis caudalis, bagian lateral dari ossa vertebrae cervicales yang dilengkapi dengan cervical ribs, memiliki jumlah costae sternalis yang banyak, rangkaian ossa gastralia pada abdomen, ossa vertebrae lumbales memiliki zygapophysis cranialis dengan sudut >90o dari sumbu tubuh. Selain itu, os vertebrae caudalis I memiliki caput cranial dan caudal, ossa vertebrae caudales memiliki processus transversus yang semakin memendek ke arah caudal. Di medioventral tulang ini ditemukan ossa chevron dengan hemal arch sampai menjelang akhir ossa vertebrae caudalis. Skelet tubuh buaya senyulong memiliki hubungan yang kokoh dan kompak untuk menunjang fleksibilitas tubuh untuk berjalan, berenang dan berburu mangsa
Keyword: anatomi, buaya senyulong, skelet tubuh