Judul: Analisis Pendugaan Limpasan di Perumahan Tamansari Persada, Bogor
Abstrak: Runoff is affected by various factors, i.e., meteorological factor represented by precipitation and regional flow factor stated the regional drainage physical properties. The change in land characteristics from natural land into developed land will reduce the absorption function in catchment areas and increase runoff. The situation could lead to the occurrence of flood if the planning of drainage at a residential area is not good. It often happens in Tamansari Persada Residence in Bogor. A study was conducted with the objective to identify the direction of runoff (incoming flow and outgoing flow) and to predict runoff in the Tamansari Persada Residence. The methods used in this study were literature review and field study. The material used included Google Earth satellite image acquisition of September 12, 2012, the rainfall data from Atang Sanjaya Weather Station at Bogor from 2003 until 2012 and topographic contour map of the residence. From the observation and analysis, the direction of runoff in the Tamansari Persada Residence followed the topographic from the south to the north. The total discharge of runoff reached 1.31 m3 s-1 in the area of 27.98 ha.
Keyword: 

Judul: Penentuan Lokasi, Luas, dan Volume Genangan Air Sebagai Potensi Cadangan Airtanah di Perumahan Tamansari Persada, Bogor
Abstrak: The changes of the green land-use as retention area to become housing area, will cause problems like enhancement of run-off, reduction of water infiltration to the land, as well as puddle and flood if water volume increases in some area. A study was conducted with the objective to determine the location, area, and volume of puddles at Tamansari Persada Residential, Bogor as groundwaters storages potential. The procedure of sampling and analysis of the data were determination of fixed location of puddles, determination of coordinate points for area and volume of puddles, and analysis of the data by aSurfer 8’s software and Gridding Krigging Method. According the research result from March to April 2013, there were three fixed puddles locations at Palm Cluster and routine flood occured when rain was falling and the maximum volume and area puddles for the first location were 0.11 m3 and 6.57 m2, the second location were 0.26 m3 and 18.82 m2, and the third location were 0.35 m3 and 20.77 m2. Generally, there are correlation from enhancement of lowest elevation, areas, and volumes of puddle and have been proved by Linear Regresion Method. From this method will produced puddle potential formula and the value of determination coefficient (R2) closer to 1. The location, areas, and volume of puddles could becoming reference of puddles potential and absorbed to the ground as an groundwater.
Keyword: 

Judul: Pengembangan Etil Ester Minyak Sacha Inchi dan Karakteristiknya sebagai Bahan Baku Kosmetik
Abstrak: PT Eteris Prima Wiyasa mengembangkan produk-produk kecantikan yang berasal dari minyak sacha inchi. Namun, minyak sacha inchi sebagai bahan baku kosmetik memiliki viskositas yang cukup tinggi sehingga memiliki tingkat penyerapan dalam kulit yang rendah. Penelitian ini bertujuan untuk mengembangkan etil ester minyak sacha inchi, uji karakteristik, dan menganalisis kandungan etil ester minyak sacha inchi untuk digunakan sebagai solusi bahan aktif pada produk perawatan kulit dalam sediaan kosmetik pengganti minyak sacha inchi. Metode yang digunakan yaitu desain keteknikan yang meliputi fase eksplorasi, fase pendefinisian masalah, fase ideasi, fase pengembangan prototipe serta fase validasi. Hasil penelitian didapatkan etil ester minyak sacha inchi memiliki viskositas yang lebih rendah dari minyak sacha inchi sehingga daya sebar dan daya serapnya lebih tinggi. Metode pengembangan etil ester minyak sacha inchi yang terbaik menggunakan Microbubble nitrogen dengan aerator batu akuarium selama 1,5 jam. Etil ester cukup stabil selama masa penyimpanan didua suhu yang berbeda dibandingkan minyak sacha inchi. Dalam etil ester minyak sacha inchi terbukti mengandung omega 3, omega 6, dan omega 9., PT Eteris Prima Wiyasa develops beauty products derived from sacha inchi oil. However, sacha inchi oil as a cosmetic raw material has a fairly high viscosity so that it has a low absorption rate in the skin. This study aims to develop sacha inchi oil ethyl esters, test characteristics, and analyze the content of sacha inchi oil ethyl esters to be used as a solution for active ingredients in skin care products in cosmetic preparations to replace sacha inchi oil. The method used is engineering design which includes the exploration phase, problem definition phase, ideation phase, prototype development phase and validation phase. The results showed that sacha inchi oil ethyl ester has a lower viscosity than sacha inchi oil so that its spreadability and absorbency are higher. The best development method of sacha inchi oil ethyl ester was using Microbubble nitrogen with aquarium stone aerator for 1.5 hours. The ethyl ester was quite stable during storage at two different temperatures compared to sacha inchi oil. The ethyl ester of sacha inchi oil was shown to contain omega 3, omega 6, and omega 9.
Keyword: Sacha Inchi, Sacha Inchi, etil ester, kosmetik, minyak sacha inchi, microbubble, ethyl esther, cosmetics, sacha inchi oil, microbubble