Industry symbiosis is an environmental management approach that is part of industrial ecology, which looks at the exchange of materials, energy, water and by products. Implementation of industrial symbiosis was begun ...
详细信息
A physical model representing an underdamped free oscillation of a cantilever beam is constructed. The model is incorporated into a pSPICE Analog Behavioral Model (ABM) in order to construct a circuit schematic that g...
详细信息
The most popular term that is used to represent brittleness texture of dry food is its crispness. Based on the previous studies, the crispness becomes the most essential quality of crisps that define the enjoyment whe...
The most popular term that is used to represent brittleness texture of dry food is its crispness. Based on the previous studies, the crispness becomes the most essential quality of crisps that define the enjoyment when eating the food. Despite its importance, crispness is still determined qualitatively by human sensory perception which is very ambiguous. Thus, a measurement technique to quantitatively define the crispness level of dry food is needed. This study introduces a measurement technique by means of compression test to quantitatively determine the crispness of dry food with random shapes. The evaluated specimen is cassava crisps with three different thicknesses: 1, 2, and 3 mm. The parameters utilized to express the crispness level are strain energy and jaggedness obtained from the load-displacement curve. According to the evaluation, the results show that the 1 and 2 mm specimens are 29.2 and 16.5% crispier than the thickest specimen of 3 mm.
A novel cost function to improve the performance of neural networks in system modelling is proposed in this paper, the exponential quadratic cost function. This cost function combines the strength of penalizing errors...
详细信息
Design teaching which is part of the system development life cycle, both information systems and application systems is very important to be taught, learned and understood in the informatics engineeringstudyprogram....
详细信息
The Sawahtambang Sandstone Formation of Sawahlunto, Indonesia has hitherto never been studied in detail to ascertain its depositional processes and its palaeoenvironment. The Sawahtambang Sandstone has more than 394 m...
详细信息
The Sawahtambang Sandstone Formation of Sawahlunto, Indonesia has hitherto never been studied in detail to ascertain its depositional processes and its palaeoenvironment. The Sawahtambang Sandstone has more than 394 m thickness which consists of conglomeratic sandstone, sandstone, and clay-silt intercalation within which six lithofacies types (St, Sp, Sh, Ss, Fl, and Fm) appear creating iterated fining upward sequence. Herewith, this paper aims to replenish the avantgarde sedimentological interpretation of the Sawahtambang Sandstone in the intermontane basin of Indonesia based on outcrops along the Trans-Sumatra Highway. The study is attained through facies identification based on stratigraphic measuring section or outcrop profile, studio analysis consists of log analysis and superposition reconstruction, and architectural element delineation according to facies association. Structures in clay-silt facies consist of lamination and fissile whereas in the sand grained include planar and trough cross-bedding, planar lamination and granule lag, which depicts a lower-flow-regime sand channel. The architectural elements that made from facies association are identified into five distinct elements (multi-storey channel, single storey channels, sand bedforms, laminated sand sheet, and floodplain fines), which present a fluvial environment. The relation of the architectural elements demonstrates that the Sawahtambang Sandstone uphold a record of the braided river system that flowed from southwest to northeast in the southwestern part of Ombilin Basin. The dominance of coarse-grained (channel and sandy bedform) element over clay-silt grained (laminated sand sheet and floodplain fines) element and the extensive appearance of thick amalgamated channel elements reinforce the interpretation of a low-sinuous braided fluvial system in which the stacking pattern shows the channel bodies accumulated both lateral via lateral accretion of point bar and via vertical amalgamated streams.
The share of electricity generated from renewable sources is growing rapidly, and thus grid-scale battery storage is becoming more prevalent. Aqueous redox flow batteries have the potential to provide safe and scalabl...
详细信息
This research aims to develop environmentally friendly Eutectic Ionic Liquids (EILs) having superior performance in recovering Rare Earth Elements (REEs) from red mud. The EILs were synthesized through the solvometall...
详细信息
This research aims to develop environmentally friendly Eutectic Ionic Liquids (EILs) having superior performance in recovering Rare Earth Elements (REEs) from red mud. The EILs were synthesized through the solvometallurgy method, with molar ratios of betaine: cis-oleic acid ranged from (1:1) to (1:7). The optimum composition of EILs was determined by Differential Scanning Calorimetry (DSC), Fourier Transform Infrared (FTIR) spectroscopy, and solubility test. The performance of EILs in REEs extraction from red mud was conducted at various compositions ratio of EILs to red mud, temperatures, and times. The results showed that EILs was successfully synthesized at optimum composition of betaine: cis-oleic acid (1:4) as indicated by the formation of the lowest eutectic point, modification of hydrogen bonding in cis-oleic acid and betaine, and highest solubility level of EILs in methanol. The structure of synthesized EILs was confirmed by Nuclear Magnetic Resonance (NMR). The optimum recovery of REEs from red mud were found at composition EILs: red mud (20 mL:1 g), 80 °C, and 48 h, with recovery percentage of 50.86 %, 55.68 %, 53.93 %, 81.65 %, and 86.62 %, for Sc , Ce, Eu, Er, and Y, respectively, as verified by X-ray Fluorescence (XRF). The emergence of a new orthorhombic and modification of monoclinic (gibbsite), trigonal, hexagonal (Quartz) crystal structures of red mud after extraction were observed by the X-ray Diffraction (XRD). The modification in morphology and composition of red mud due to extraction were verified by Scanning Electron Microscope-Energy Dispersive X-Ray (SEM-EDX). The NMR spectra confirmed that EILs has great recyclability and structure stability after used in red mud extraction. It can be inferred that the betaine-cis oleic acid based EILs are being potential as environmentally friendly solvent for REEs recovery.
Green building has recently become the main approach in the construction of a building, including in Indonesia. A building that has been certified as a green building does not mean that it has all the components that ...
Green building has recently become the main approach in the construction of a building, including in Indonesia. A building that has been certified as a green building does not mean that it has all the components that meet the requirements of comfort, health and safety, especially if the main goal for certification is to pursue energy efficiency in buildings. The purpose of this study is to describe the level of user satisfaction of the UGM Law Learning Center building after the building is certified as a green building. This type of research is a post-occupancy evaluation (POE) in the form of survey research with a quantitative descriptive approach. The steps to be taken are: identification of building performance based on the EDGE instrument, identification of building data, interviews, observations, data search through questionnaires, quantitative descriptive analysis. The results of the study indicate that, in general, the spaces in the building have met the activity needs and user comfort, but there are several aspects that need to be improved, namely: visual comfort, cleanliness, and spatial efficiency.
暂无评论