Judul: Sifat dan Kualitas Fisik Daun Torbangun (Coleus amboinicus Lour.) yang Diproses Menjadi Pellet
Abstrak: Physical characteristics of ration are important aspects in feed mill industry, because they are related to handling efficiency, processing and storage. Torbangun plant in Indonesia has not used for animal feed. The process of drying and processing plants as feed ingredients affect the moisture content. This study aims to determine the physical properties of plant leaves torbangun and the influence on physical pellet quality in particular due to different moisture content of materials (12%, 13.5%, 15%) prior to pelleting process. The experimental design used was a completely randomized design with 3 treatments and 4 replications. The experimental data were analyzed using analysis of variance (ANOVA), the different among treatments were further tested using Duncan Test. The parameters observed were pellet durability index, spesific gravity, bulk density, compacted bulk density, angle of respone and moisture content of pellet. Different moisture content of torbangun level significantly affect (P <0.05) the bulk density, compact bulk density, angel of heap, and pellet durability index, however do not significantly (P> 0.05) affect the specific gravity.
Keyword: Torbangun, physical characteristics, pellet, moisture content

Judul: Pengaruh Proses Pelleting Terhadap Kelarutan dan Aktivitas Anti Bakteri Daun Torbangun (Coleus amboinicus Lour)
Abstrak: Torbangun (Coleus amboinicus Lour) is a herb that can be used as feed supplement. Processing torbangun into pellets is one of the way to keep the nutritional content to not easily damaged, improve efficiency and can be saved. The purpose of this research was to study the effect of processing plants into pellets with different water content on the solubility and antibacterial activity of torbangun (Coleus amboinicus Lour). The experimental design of this study used a Completely Randomized Design (CRD) of 3 treatments, which were P1 (12%), P2 (13.5%), and P3 (15%) with 3 replications. The variables measured were solubility and anti-bacterial Bacillus subtilis, Staphylococcus aureus, Escherichia coli and Salmonella typhimurium. The results showed that the pelleting process lowered the value of the solubility and antibacterial activity in torbangun. Different levels of water content had no effect on the solubility, while the antibacterial activity showed different result depending on the type of bacteria because each bacteria react differently.
Keyword: torbangun., test the inhibition of bacterial, solubility test

Judul: Kruskal Coordinates in 4+1 Dimensional Schwarzschild  Spacetime Geometry
Abstrak: Koordinat Kruskal adalah hasil ekstensi maksimal dari koordinatSchwarzschild yang menimbulkan interpretasi baru tentang keberadaan wormhole. Secara teori, wormhole adalah struktur yang menghubungkan dua titik berbeda dalam ruangwaktu. Namun, ukuran wormhole terlalu kecil untuk dapat dilalui dan tidak stabil sehingga mudah runtuh. Penelitian ini bertujuan mendapatkan solusi koordinat Kruskal untuk geometri Scwarzschild pada dimensi yang lebih tinggi yang dapat berguna untuk menganalisis kestabilan wormhole. Penelitian ini dilakukan melalui penambahan dimensi ruang dari 3+1 dimensi menjadi 4+1 dimensi untuk mendapatkan geometri Schwarzschild, koordinat Eddington-Finkelstein, dan koordinat Kruskal dengan memanfaatkan gerak radial foton. Hasil akhirnya, solusi geometri ruangwaktu Schwarzschild dalam koordinat Kruskal dapat dibentuk dan diilustrasikan dalam diagram Kruskal. Diagram tersebut menunjukan sebuah black hole, white hole, dan dua alam semesta yang dihubungkan oleh wormhole., The Kruskal coordinates are the maximal extension of the Schwarzschild coordinates which give rise to new interpretations of the existence of wormholes. In theory, a wormhole is a structure that connects two different points in spacetime. However, the size of the wormhole is too small to pass through and is unstable so that it collapses easily. This study aims to obtain Kruskal coordinate solutions for the Scwarzschild geometry in higher dimensions which can be useful for analyzing wormhole stability. This research was carried out by adding space from 3+1 dimensions to 4+1 dimensions to obtain Schwarzschild geometry, Eddington Finkelstein coordinates, and Kruskal coordinates by utilizing the radial motion of photons. The final result, the solution of the Schwarzschild spacetime geometry in Kruskal coordinates can be formed and illustrated in a Kruskal diagram. The diagram shows a black hole, a white hole, and the two universes connected by a wormhole.
Keyword: Schwarzschild geometry, Eddington-Finkelstein coordinates, Kruskal coordinates, radial motion of photons, wormhole