10 articles in this issue
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Reni Desmiarti,Fusheng Li
The behavior of natural estrogens was examined by separately spiking 17ß-estradiol (E2) and estrone (E1) into semicontinuous activated sludge reactors operated under aerobic, anaerobic and sequential anaerobic/aerobic conditions. Under aerobic and anaerob... see more
S. Supriyono,Awali Priyono,Wahyu Triyoso,Hilman Mardiyan
Conventional velocity analysis is usually done in a relatively spare grid, for instance every half kilometers, during the processing of seismic data. It is very laborious work and very subjective. To deliver an accurate velocity picking, processing geophy... see more
R. Poerbandono,Totok Suprijo
This investigation aims to propose an attenuation rate for range normalization of echo amplitudes recorded by an acoustic backscattering instrument working at a frequency of 1.0 MHz. The intention of the use of such an attenuation rate is to obtain equal ... see more
Joshua O. Okeniyi,Adedamola O. Ogunsanwo,Nosadeba W. Odiase,Uchechukwu E. Obiajulu,Elizabeth T. Okeniyi
This paper studies a methane (CH4) emission model from the waste of cattle (B. primigenius) based on trends in integrated livestock-fish farming adoption by farmers in Nigeria. Dung of B. primigenius was employed as substrate in fish-water, obtained from ... see more
Bambang Arip Dwiyantoro,Shiu-Wu Chau
In this study the dewetting process on micropillars of three different cross-sectional shapes, i.e. circular, square and triangular, was numerically investigated. The influence of the orientation of the triangular and square micropillars on the dewetting ... see more
Kasni Sumeru,Shodiya Sulaimon,Farid Nasir Ani,Henry Nasution
The present study describes a numerical approach for determining both the motive nozzle and constant-area diameters of an ejector as an expansion device, based on the cooling capacity of a split-type air-conditioner using R290 as refrigerant. Previous stu... see more
Vita Wonoputri,Mohammad Effendy,Yogi Wibisono Budhi,Yazid Bindar,S. Subagjo
This paper describes akinetic study for the determination of the kinetic parameters of lean methane emission oxidation over Pt/?-Al2O3 in a dedicated laboratory scale fixed bed reactor. A model ofthemechanistic reaction kinetic parameters has been develop... see more