Judul: Perbandingan Ukuran dan Bentuk Morfometrik Permukaan Kepala Beberapa Domba Lokal Indonesia
Abstrak: The aim of this research was to compare the head size and shape of thin-tailed sheep (domba ekor tipis or DET), batur, wonosobo, and garut sheep (fighting and meat types). The variables measured were akrokranion-prosthion (X1), basion-prosthion (X2), mandibular (X3), head height (X4), facial tuber (X5), nasion-rhinion (X6), entorbitale (X7), euryon (X8), supraorbitale (X9). There were 111 heads of local sheep that used in research (32 rams and 79 ewes). Data were analyzed by descriptive statistics, T2-Hotelling and principal component analysis. Differences of head size surface among breeds were found in this experiment. The head size discrimination of the DET and garut meat type was basion-prosthion, since the eigen vektors are +0912 and +0928, respectively. The head size discrimination of the batur and wonosobo sheep was akrokranion-prosthion that their eigen vektors are +0969 and +0902 respectively. The head shape discrimination of DET, wonosobo and garut meat type were mandibular which those eigen vektors are +0904, +0836, and +0965 respectively. The head shape discrimination of Batur sheep was head height with the value of eigen vektor is +0907. The head size and shape discriminations on garut fighting type sheep was head hight with eigen vektor values are +0905 and -0406. Data clustered between garut fighting and meat types was separated. It also happened between batur sheep and wonosobo sheep. Overlaping data was found on DET, garut fighting-type, wonosobo and batur sheep.
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Judul: Variabel pembeda morfometrik ukuran permukaan kepala antara domba betina ekor tipis batur Wonosobo dan Garut
Abstrak: Morfometrik kepala domba bersifat khas dan merupakan karakteristik tersendiri pada setiap jenis domba. Penelitian ini bertujuan untuk menganalisis dan mengidentifikasi perbedaan morfometrik kepala domba betina antara Domba Ekor Tipis (DET), domba Batur, domba Wonosobo, domba Garut Tangkas dan domba Garut Pedaging. Variabel-variabel yang diamati meliputi akrokranionprosthion, basion-prosthion, rahang bawah, tinggi kepala, tuber facial kiri-kanan, nasion-rhinion, entorbitale kiri-kanan, euryon kiri-kanan dan supraorbitale kiri kanan. Ternak yang digunakan berjumlah 79 ekor. Analisis data menggunakan statistik deskriptif, statistik T2 -Hotelling, analisis diskriminan Fisher, WaldAnderson dan jarak minimum D2 -Mahalanobis. Hasil penelitian menunjukkan bahwa nasion-rhinion ditemukan sebagai variabel pembeda antara DET vs Batur. Akrokranion-prosthion, basion-prosthion, tinggi kepala dan nasion-rhinion adalah variabel pembeda antara DET vs Wonosobo dan antara DET vs Garut Tangkas. Basion-prosthion merupakan variabel pembeda antara DET vs Garut Pedaging. Nasion-rhinion adalah variabel pembeda antara Batur vs Garut Tangkas, dan variabel pembeda antara Batur vs Garut Pedaging. Jarak minimun D2 - Mahalanobis atau jarak ketidakserupaan morfometrik antara DET vs Batur sebesar 5.836, DET vs Wonosobo 5.729, DET vs Garut Tangkas 3.076, antara DET vs Garut Pedaging 2.523, antara Batur vs Garut Tangkas 2.285, antara Batur vs Garut Pedaging 3.605. DET membentuk kelompok terpisah dari domba lainnya, domba Garut dan Wonosobo memiliki hubungan ketidakserupaan morfometrik yang dekat.
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Judul: Elektrodeposisi Film Tipis Semikonduktor Cu2ZnSnS4 (CZTS) pada Substrat Kaca ITO
Abstrak: Semiconductor Cu2ZnSnS4 (CZTS) thin film that can be used as absorber layers on solar cell module was made via electrodeposition method. CZTS thin film was electrodeposited on the surface of a silicate glass coated with a thin layer of indium tin oxide (ITO). Deposition process was done using potentiostatic mode at room temperature with a potential of 1.05 V for 30, 45, and 60 minutes, followed with annealing the film at 2 different temperatures, 500 ºC using furnace and 180 ºC using hot plate, both treatments for 45 minutes in N2/H2S atmosphere. The X-ray difractograms were analyzed using Match 2 program and showed that the CZTS thin films had kesterit crystalline structure, with a low percentage of CZTS phase. The thin film also contained secondary phases such as Cu2S, ZnS, and SnS. The obtained CZTS thin films had a thickness between 1.039 and 1.676 μm. Absorption study showed that the band gap energy of CZTS thin films which was annealed using furnace ranged from 1.50 to 1.52 eV, whereas that annealed using the hot plate was not observed. The band gap energy value showed that CZTS thin films can be used as sunlight absorber layers on solar cell. The formation of CZTS crystal film on this investigation was effectively performed using furnace annealing process at a temperature of 500 ºC with deposition time of 45 minutes.
Keyword: Thin film, Electrodeposition, Cu2ZnSnS4