Judul: Body Weight Estimation of Rexsi-Agrinak and Satin Rabbits Using Principal Component Regression Analysis
Abstrak: Kelinci adalah ternak pseudo-ruminansia dengan produktivitas tinggi yang dapat dijadikan sebagai ternak penghasil daging, penghasil fur, atau dijadikan sebagai hewan hias. Kelinci rexsi-agrinak merupakan kelinci hasil pemuliaan kelinci rex yang dilakukan oleh Balai Penelitian Ternak (Balitnak). Penelitian ini bertujuan menentukan variabel permukaan tubuh linear yang paling berpengaruh terhadap bobot badan pada kelinci rexsi-agrinak dan satin serta membuat persamaan pendugaan bobot badan melalui analisis regresi komponen utama. Penelitian ini menggunakan 40 ekor kelinci rexsi-agrinak dan 39 ekor kelinci satin. Variabel-variabel yang diukur yaitu lingkar dada (X1), dalam dada (X2), lebar dada (X3), panjang radius ulna (X4), panjang humerus (X5), panjang femur (X6), panjang tibia (X7), panjang punggung (X8), lebar panggul (X9), dan lingkar kanon (X10). Elastisitas digunakan untuk mengukur variabel yang paling berpengaruh terhadap bobot badan kelinci rexsi-agrinak dan satin. Lingkar dada (X9) merupakan variabel yang paling berpengaruh terhadap bobot badan kelinci rexsi-agrinak dan satin. Semua variabel yang diamati berpengaruh nyata terdahap bobot badan sehingga persamaan pendugaan bobot badan memasukkan semua variabel., Rabbits are pseudo-ruminants that have high productivity that can be kept as meat producer, fur producer or ornamental animals. rexsi-agrinak rabbit is the result of rex rabbit breeding by the Indonesian Research for Animal Production, Livestock Research and Development Center, Agricultural Research and Development Agency, Ministry of Agriculture. This study aims to determine the linear body surface variable that has the most influence on body weight in rexsi-agrinak and Satin rabbit breeds also to determine bodyweight estimation equation by using principal component analysis. This study uses 40 rexsi-agrinak rabbits and 39 satin rabbits. Variables measured in this study are chest circumference (X1), chest (X2), chest width (X3), radius ulna length (X4), humerus length (X5), femur length (X6), tibia length (X7), back length (X8), hip width (X9), and canon circumference (X10). Elasticity is used to measure variable that has the most influence on rexsi agrinak and satin rabbits bodyweight. Chest circumference (X9) is the variable that most affects the body weight of rexsi-agrinak and satin rabbits. All the variables have a real impact to bodyweight so that bodyweight estimation equations include all variables.
Keyword: analisis regresi komponen utama, pendugaan bobot badan, rexsi-agrinak, satin, bodyweight estimation, principal component regression analysis

Judul: Variabel Pembeda Ukuran Permukaan Tubuh Kelinci Rexsi-Agrinak dan Satin
Abstrak: Kelinci rexsi-agrinak dan satin merupakan kelinci dengan tipe produksi dwiguna yang menghasilkan daging dan fur. Penelitian ini bertujuan untuk memperoleh variabel pembeda dan skor Wald-Anderson pada galur rexsi-agrinak dan bangsa satin. Pengukuran morfometrik dilakukan pada 10 variabel diantaranya lingkar dada (X1), dalam dada (X2), lebar dada (X3), panjang radius ulna (X4), panjang humerus (X5), panjang femur (X6), panjang tibia (X7), panjang punggung (X8), lebar panggul (X9), dan lingkar kanon (X10). Analisis diskriminan linear Fisher digunakan untuk menentukan variabel pembeda dari empat kelompok kombinasi kelinci berdasarkan jenis kelamin dan galur dengan bangsa. Klasifikasi Wald-Anderson digunakan untuk menentukan individu kelinci yang telah memenuhi kriteria klasifikasi Wald-Anderson. Variabel pembeda pada kombinasi rexsi-agrinak dan satin betina yaitu dalam dada (X2) dan panjang punggung (X8). Variabel pembeda pada kombinasi rexsi-agrinak jantan dan betina yaitu lingkar dada (X1), dalam dada (X2), dan panjang punggung (X8). Persentase koreksi skor Wald-Anderson pada kombinasi rexsi-agrinak dan satin betina 87,18% sedangkan pada kombinasi rexsi-agrinak jantan dan betina 85%. Persentase yang tidak mencapai 100% mengindikasikan terdapat kemiripan individu antara kelompok pada kedua kombinasi., Rexsi-Agrinak and satin rabbits are rabbits with a dual-purpose production type that produces meat and fur. This study aimed to obtain the differentiating variables and the Wald-Anderson score in rexsi-agrinak and satin strains. Morphometric measurements were done on ten variables which are chest circumference (X1), chest (X2), chest width (X3), radius ulna length (X4), humerus length (X5), femur length (X6), tibia length (X7), back length (X8), hip width (X9), and canon circumference (X10). Fisher's linear discriminant analysis was used to determine the differentiating variables from the four combinations of rabbits based on sex and breed. The Wald-Anderson classification was used to determine individual rabbits that suit the Wald-Anderson classification criteria. The differentiating variables in the female rexsi-agrinak and satin combination are chest (X2) and back length (X8). The differentiating variables in the male and female rexsi-agrinak combination are chest circumference (X1), chest depth (X2), and back length (X8). The percentage correction of the Wald-Anderson score for the female rexsi-agrinak and satin combination was 87.18%, while the male and female rexsi-agrinak combination was 85%. The percentage that does not reach 100% indicates that there are individual similarities between the groups in the two combinations.
Keyword: Fisher's linear discriminant, morphometric, rabbit, rexsi-agrinak, satin

Judul: Photovoltaic Effect In A CdS/P3HT-Chitosan Junction
Abstrak: A CdS/Polymer junction has been fabricated and it’s photovoltaic effect has been studied. The polymer is a blend of poly-3hexyltiophene (P3HT), chitosan and polyethileneglicol (PEG). Boron in situ doping of CdS using Chemical Bath Deposition (CBD) was investigated. The effect of B-doping and annealing on optical properties as well as on electrical and morphology of CdS film were studied. The structure and morphology of the film were detected by XRay Diffraction (XRD) and Scanning Electron Microscopy (SEM). The polymer film was sandwiched between the CdS semiconductor and an ITO glass to form an ITO/CdS/Polymer/ITO photovoltaic cell. Time constant (τ) and open circuit voltage (Voc) were investigated by using voltage censor. The bandgap of films were determined using absorbance edge method. The results of annealing optical bandgap of undoped CdS shifted from 2,49 eV down to 2,39 eV. Phase transition of CdS due to annealing temperature and induced lattice damage due to doping. The room temperature conductivity of polymer is 3,8 – 6,6 x 10-7 S/cm as function of frequency between 100 – 5000 Hz. The Voc of the fabricated cells ranges between 107 – 286 mV and time constant ranges between 2,5 to 43,75 s.
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