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: Penerapan Regresi Logistik Biner Multilevel terhadap Ketepatan Waktu Lulus Mahasiswa Program Magister Sekolah Pascasarjana IPB
Abstrak: Lama studi lulusan merupakan salah satu indikator keberhasilan studi dari perguruan tinggi. Lama studi untuk program magister dapat dibedakan menjadi dua kategori yaitu lulus tepat waktu (lama studi ≤24 bulan) dan lulus tidak tepat waktu (lama studi >24 bulan). Dalam analisis regresi klasik, individu mahasiswa diasumsikan saling bebas. Namun pada kenyataannya, setiap mahasiswa terkelompok ke dalam program studi yang berbeda, sehingga mahasiswa yang berada pada program studi yang sama cenderung memiliki kemiripan karakteristik. Regresi multilevel merupakan salah satu analisis yang mengakomodir masalah tersebut. Level yang digunakan dalam penelitian ini adalah level 1 (individu mahasiswa) dan level 2 (program studi). Model regresi multilevel terbaik yang didapatkan adalah model dengan intersep acak dan nilai keragaman yang dihasilkan dari program studi sebesar 0.6636. Faktor-faktor yang berpengaruh terhadap ketepatan waktu lulus adalah usia, status perkawinan, dan sumber biaya pendidikan S2.
Keyword: keberhasilan studi, lama studi, regresi logistik biner, regresi multilevel

Judul: Systematics of Desmos (Annonaceae) in Malesia
Abstrak: Desmos is a woody climbing genus of Annonaceae which has been widely used as traditional medicine in several countries such as China, Indo-China, Thailand, and Peninsular Malaysia to treat dysentery, vertigo, fever, and postpartum. Phylogenetic studies on Desmos showed a close relationship between Desmos and Dasymaschalon. They share similar moniliform monocarpic fruits, but their flowers are different. It has been debated among Annonaceae researchers whether both genera should be treated as the same or distinct genus. Therefore, investigation on the taxonomic delimitation of Desmos species and Dasymaschalon will be necessary. Plastid genome (plastome) identification, leaf epidermal section of Desmos species and Dasymaschalon species, a taxonomic revision of Desmos in Malesia using morphological data, the spatial distribution of Desmos species in Malesia, and morphological and genetic variation in Desmos chinensis population using ISSR marker were used to investigate taxonomic delimitation of Desmos. Plastome study of Desmos chinensis and Dasymaschalon dasymaschalum was carried out to determine the origin, evolution, phylogenomics, and identify marker candidates for Desmos and Dasymaschalon or with other genera in Annonaceae. We discovered that the plastome of Desmos chinensis was circular with the size of 167,677 bp (smaller than Dasymaschalon dasymaschalum), consist of 111 genes, including 78 protein-coding genes, 29 transfer RNAs, and 4 ribosomal RNAs. The plastome showed a typical quadripartite structure, i.e., large single copy (LSC), small single copy (SSC), and two inverted repeats (IRs). The plastome of Dasymaschalon dasymaschalum was 191,488 bp in length, which also exhibited a typical quadripartite structure (LSC, SSC, and two IRs). Desmos chinensis and Dasymaschalon dasymaschalum showed different copies of accD, ndhD, ndhF, rps18, and ycf2. Protein coding genes of rpoB, rpoC1, rbcL, matK, rpl32, infA, and rpl36 were identified based on nucleotide diversity, sequence variability, and parsimony-informative sites. The genes are defined as molecular marker candidates of plastome for phylogenetic, barcoding, and population genetic research. We predicted that Desmos chinensis and Dasymaschalon dasymaschalum separated at ca. 64 million years ago during the Paleocene. Leaf anatomical feature study was carried to support the taxonomic delimitation of interspecific Desmos and intergeneric of Desmos and Dasymaschalon. Leaf anatomy in the paradermal section of 20 taxa (12 species of Desmos, eight species of Dasymaschalon) have been carried out. According to the leaf epidermal section, Desmos and Dasymaschalon are two distinct genera mainly distinguished based on the anticlinal wall undulation of epidermal cells and supported by variation of the crystal type and size. The anticlinal wall undulation of Desmos was almost straight to slightly wavy and never sinuous; meanwhile, Dasymaschalon varies from almost straight to deeply sinusoid. The crystals of Desmos consist of rhombohedral, druse type A, and druse type B crystals, whereas Dasymaschalon has prism, druse type A, druse type B, and druse type C crystals. The recent taxonomic revision using the morphological data was mainly based on the examination of about 1374 specimens from BO, L, WAN, ANDA, SING, SAN, K, P, HUH herbaria. The Desmos species in Malesia consists of eight species: D. acutus, D. chinensis, D. chryseus, D. dunalii, D. pedunculosus, D. subbiglandulosus, two new records: D. lawii and D. macrocarpus, and one
Keyword: Dasymaschalon, Desmoid clade, Magnoliid, plastid genome, phylogenomics analysis