Judul: Analisis Biaya Produksi dan Profitabilitas Flooring, Decking, dan Parquet Block Jati (Studi Kasus di Industri kayu 1 Sub Brumbung Perum Perhutani Jawa Tengah).
Abstrak: Industri kayu 1 sub Brumbung adalah salah satu bentuk usaha yang didirikan oleh Perum Perhutani. Produk yang dianalisis dalam penelitian ini meliputi flooring, parquet block, dan decking. Tujuan penelitian adalah untuk menghitung biaya produksi dan menganalisis profitabilitas perusahaan. Hasil penelitian menunjukkan biaya produksi flooring, decking, dan parquet block masing-masing sebesar Rp33.48 juta per m³, Rp33.51 juta per m³, dan Rp22.56 juta per m³. Nilai Return on investment masing-masing produk sebesar 48.01% per tahun, 24.18% per tahun dan 7.86% per tahun. Nilai Break Even Point masing masing sebesar 491.43 m³ per tahun, 8.41 m³ per tahun dan 100.18 m³ per tahun. Biaya persiapan bahan baku merupakan komponen biaya terbesar sehingga perlu dikendalikan dengan baik agar efisiensi dan efektivitas dalam pemanfaatan bahan baku optimum.
Keyword: biaya produksi, profitabilitas, titik impas, return on investment, flooring, decking, parquet block

Judul: Analisis Biaya Produksi dan Profitabilitas Furnitures dan Housing Components Jati (Studi Kasus di Industri Kayu 1 Sub Brumbung, Perum Perhutani Jawa Tengah)
Abstrak: Adanya peningkatan persaingan produsen furnitures dan housing components menyebabkan setiap perusahaan dalam industri ini perlu melakukan analisis biaya produksi dan profitabilitas. Hal demikian untuk menginformasikan perusahaan mengenai struktur biaya produksi, dan membantu perusahaan untuk mengelola pengeluaran guna mencapai tujuannya. Hasil penelitian menunjukkan biaya produksi, return on investment, dan break even point dari furnitures masingmasing Rp39.3 juta/m3, 34.9%/th dan 4.3 m3/th; sedangkan nilai untuk housing components masing-masing Rp37.9 juta/m3, 16.7%/th dan 57.5 m3/th. Selain itu, perusahaan harus memperhatikan dalam penggunaan kayu jati ketika biaya untuk kayu jati lebih dari 80% dari biaya produksi.
Keyword: biaya produksi, break even point, furnitures, housing components, return on investment

Judul: Hybrid solar cells of ZnO nanoparticles/chlorophyll was modified metal ions (Zn2+ and Cu2+ )
Abstrak: Zinc Oxide (ZnO) is a n-type semiconductor with a wide the energy band (Band Gap) is 3.37 eV at room temperature and 3.34 eV at low temperature with a large exiton binding energy is 60 meV. ZnO has been synthesized by hydrothermal method, resulting in a decrease in particle size over the duration of the hydrothermal changes. Crystallographic structure of ZnO were characterized using XRD, has shown the characteristic pattern of a hexagonal wurtzite structure, the crystallite size increases to changes in particle size. Changes in particle size has also led to a change in the absorption peak of ZnO as has been demonstrated posted under test using the optical properties of UV-Vis spectrophotometer. Changes of this uptake has also led to changes in the energy band gap, which increases its band gap energy of the particle size. In electronic applications, especially in solar cells. Chlorophyll is considered less effective, because of their very nature are easily degraded as a result of several reactions which are acid, lighting and temperature. The results of the stability test using a halogen lamp 34 W/m2 for 5 hours, that the substitution of chlorophyll with metal ions Zn2+ and Cu2+ has been shown to form more stable than natural chlorophyll. The characterization of the optical properties, the combination of ZnO / chlorophyll in the form of hybrid films has led to a shift in the absorption region of ZnO becomes more widely from the UV to Visible. ZnO/chlorophyll has absorption range of 350-515 nm, ZnO / Zn-feofitin 332-401 nm and 332-632 nm for Cu-feofitin. The combination of ZnO/chlorophyll and CuSCN as a solid electrolite in hybrid solar cell, a modified chlorophyll with metal ions Zn2+ and Cu2+ has been shown to form a more stable I-V curve. It is characterized by its fill factor value greater than natural chlorophyll. Nevertheless, solar cells with natural chlorophyll has been able to produce higher efficiency values of chlorophyll were substituted.
Keyword: Hydrothermal, ZnO/Chlorophyll modified, Hybrid Solar Cell