Judul: Kecernaan Nutrien dan Performa Sapi Pasundan yang Diberi Suplemen Pakan Mengandung Daun Lamtoro dalam Bentuk Wafer
Abstrak: Pasundan cattle is a local beef cattle from West Java Indonesian that expected to fulfill the meat demand, especially in West Java. The increasing efforts of beef cattle productivity is constrained by the availability of forage feed materials. Forage feed availability fluctuate especially during the dry season. Another limitation in the increasing of beef cattle productivity is the lack of nutrient content in the feed, such as protein. To overcome these problems required the addition of feed supplement in the Wafer form containing Leucaena Leaves. The purpose of this research was to analyze the effect of Wafer supplement in the different levels on the nutreint digestibility and performance of Pasundan cattle. This study used blok randomized design using 4 treatments and 5 replications. The treatments were P0: conventional feed (bran, rice straw, and elephant grass), P1: conventional feed + 5% Leucaena wafer, P2: conventional feed + 9.5% Leucaena wafer, P3: conventional feed + 15% Leucaena wafer). The grouping is based on body weight ie. very small body weight (70.23 ± 9.15 kg), small (99.55 ± 7.87 kg), medium (115.23 ± 8.44 kg), large (136.59 ± 7.10 kg). The variables were nutrient intake and digestibility, final body weight, daily body weight gain, feed efficiency, and income over feed cost (IOFC). The result showed that the addition of wafers supplement containing lamtoro leaves did not affect the nutrient digestibility. However, the addition of wafer supplement at level 9.5% increased (P<0.05) nutrient consumption, body weight, daily weight gain, feed efficiency, and IOFC compared to the other treatments.
Keyword: nutrient digestibility, performance, wafer feed suplement, pasundan cattle

Judul: Efek Pemberian Wafer Suplemen Pakan Mengandung Daun Lamtoro (Leucaena Leucocephala) terhadap Konsumsi dan Kecernaan Pakan Domba Lokal
Abstrak: Feed is an important aspect for productivity of livestock. Low quality feed can reduce the productivity of the livestock, so wafer of fed supplement is one of alternative. Wafer lamtoro supplement is one of the feed processing products that have high nutritional value that can help increase the production of livestock. This research aimed to assess the effect of wafer fed supplement on nutrient consumption and digestibility of local sheep rations. This research used Randomized Block Design with 4 treatments and 3 blocks as replicate and used 12 heads of local sheep with initial body weight 24.54±10.51 kg. Treatments were P0 = basal diet + 0% wafer of feed supplement (control); P1 = basal diet + 5% wafer of feed supplement; P2 = basal diet + 10% wafer of feed supplement; P3 = basal diet + 15% wafer of feed supplement. The Results showed that wafer fed supplement had significantly effect (p<0.05) for nutrient consumption, crude protein digestibility, final body weight and feed efficiency but not significant for dry matter digestibility, organic matter digestibility and crude fiber digestibility
Keyword: wafer lamtoro supplement., sheep, digestibility, consumption

Judul: Pemodelan Harmonik Generasi Kedua Pada Struktur Kristal Perovskite (MAPbI3) Menggunakan Metode Ikat Hiperpolarisabilitas Sederhana Nonlinier.
Abstrak: Metilamonium timbal iodida (MAPbI3) dikenal memiliki struktur fase transisi yang bergantung suhu. MAPbI3 memiliki bulk point group dan surface point group pada kristal sentrosimetrik berupa 4/mmm (simetri D4h) dan mm2 (simetri C2v). Bulk point group pada kristal non-sentrosimerik adalah 4mm (simetri C4v). Penelitian ini meninjau second harmonic generation (SHG) pada MAPbI3 simetri C2v dan D4h dengan simplified bond hyperpolarizability model (SBHM). Pada kristal sentrosimetrik simeri D4h terdapat inversi simetri yang menyebabkan elektrik dipol terinduksi SHG menjadi terlarang, namun tidak berlaku pada permukaan simetri C2v karena inversi simetri hampir tidak ada. Hasil SBHM menunjukkan terdapat intensitas SHG pada simetri C2v dan tidak ada intesitas SHG pada simetri D4h.
Keyword: SBHM, SHG, MAPbI3, simetri D4h, simetri C2v