Judul: Analysis of Body Size Characteristics in Beef Cattle using Principal Component Analysis (PCA)
Abstrak: Penelitian ini bertujuan menganalisis morfometrik dan menentukan penciri utama pada sapi pejantan Peranakan Ongole (PO), Brahman, Angus dan Belgian Blue (BB) di Balai Inseminasi Buatan (BIB) Lembang. Total sampel yang digunakan dalam penelitian ini berjumlah 47 ekor sapi pejantan. Peubah ukuran-ukuran tubuh yang diamati terdiri atas tinggi pundak, panjang badan, tinggi pinggul, lebar pinggul, dalam dada, lingkar dada dan lebar dada. Data pengukuran ukuran-ukuran tubuh dikoleksi di BIB Lembang pada Maret 2021. Data ditabulasi dengan mengoreksi berdasarkan umur dan data dianalisis menggunakan uji t dan analisis komponen utama (AKU). Hasil uji t terhadap ukuran tubuh antara keempat bangsa sapi pejantan sebagian besar menunjukkan perbedaan (P<0.05). Adapun peubah penciri untuk sapi Brahman dan BB tidak memperlihatkan penciri khusus untuk ukuran tubuh. Penciri ukuran tubuh terdapat pada sapi PO, yaitu lebar dada, lebar pinggul, lingkar dada, dalam dada dan panjang badan. Penciri ukuran tubuh dari sapi Angus adalah lebar dada dan lebar pinggul. Hasil penelitian ini diharapkan dapat dijadikan sebagai informasi dasar dalam strategi program pemuliaan ke depan., This study aims to analyze the morphometrics and determine the main characteristics of Ongole Crossed, Brahman, Angus and Belgian Blue (BB) at the Institute for Artificial Insemination Lembang. The number of samples used in this study found 47 bulls. The variables of body measurements observed consisted of whithers height, body length, hip height, rump width, chest depth, chest girth, and chest width. The measurement data was taken in March 2021. Data were tabulated by correcting by age and data analysis using t-test and principal component analysis (PCA). The results of the t-test on body size between the four breeds of bulls mostly shows differences (P<0.05). Meanwhile, the characterizing variables for Brahman and BB cattle did not show specific characteristics for body size. Characteristics of body size found in PO cattle are chest width, hip width, chest girth, chest depth and body length. While Angus cattle are chest width and hip width. The results of this study are expected to be used as basic information in breeding program strategies.
Keyword: AKU, PCA, Ukuran Tubuh, sapi pedaging, Body Size, Beef Cattle

Judul: Evaluation of Linier Body Size Measurement in Different Breeds of Beef Cattle with Digital Imaging Method
Abstrak: Metode citra digital digunakan dalam pengukuran ukuran linier tubuh ternak bertujuan agar ternak tidak stres saat proses pengukuran. Penelitian menggunakan masing-masing 50 ekor sapi pejantan dengan umur I2 (2,5-3 tahun) pada bangsa simmental, limousin dan peranakan angus dengan bobot potong simmental 327-766 kg, limousin 313-920 kg dan peranakan angus 402-782 kg. Data dianalisis dengan menggunakan analisis kovarian, kemudian dilanjutkan dengan Uji Tukey jika terdapat perbedaan antar perlakuan. Hasil penelitian menunjukkan pada ukuran panjang badan nyata lebih tinggi (P<0,05) pada bobot potong sapi simmental, tinggi badan nyata lebih tinggi (P<0,05) pada bobot potong sapi peranakan angus serta ukuran dalam dada dan lingkar dada nyata lebih tinggi (P<0,05) pada bobot potong sapi simmental dan peranakan angus. Evaluasi ukuran permukaan linier tubuh menggunakan metode citra digital pada sapi simmental memiliki nilai korelasi yang sangat kuat daripada sapi limousin dan sapi peranakan angus pada lingkar dada dan dalam dada dengan bobot potong. Ukuran linier tubuh lingkar dada dan dalam dada pada sapi simmental memengaruhi bobot potong., Digital imaging method is used to measure one livestock’s body size without causing any stress. The study used 50 heads of bulls for the simmental, limousine and angus crossbreeds with the age range I2 (2,5-3 years) and slaughter weight of 327-766 kg for simmental, 313-920 kg for limousine and 402-782 kg for angus crossbreds. Data were analyzed using covariance, then tested by Tukey to determine the differences between treatments. The results showed that the measurement of body length has significant effect (P<0,05) in simmental slaughter weight, significant effect (P<0,05) of body height in angus crossbred slaughter weight, and significant effect (P<0,05) of chest weight and chest circumference in Simmental and angus crossbred slaughter weight. Evaluation of linier body size measurement with digital imaging method in simmental bull have correlation value is categorigied as substantial than limousin and angus crossbreed bull of chest circumference and chest weight with slaughter weight. The dimension body size of chest circumference and chest weight for simmental bulls can be used as parameters to determine slaughter weight.
Keyword: bobot potong, citra digital, sapi potong, ukuran linier tubuh

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