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Jember, Indonesia

Suryaningrat I.B.,University of Jember
International Journal on Advanced Science, Engineering and Information Technology | Year: 2016

Processed cassava products are common agroindustrial products in Indonesia food market. Low of product improvement is still common problem faced by cassava food producers. Evaluation of this product is strongly needed to improve quality of processed cassava products. Recently, evaluation of consumer expectation is required to be conducted to improve product quality and\ to answer consumer expectation as well. The objectives of this study was to evaluate the consumer's needs as a basic to reach a sustain supply chain in processed cassava product. In this study, Quality Function Deployment (QFD) method was implemented to evaluate consumer expectation and to develop a sustainable supply chain of processed cassava products. Information were gathered from many resources such as suppliers, outlet owners, producers, workers, processing operators and marketing staff from four famous processed cassava production units. Based on House of Quality (HOQ) the results of this study showed that 4 attributes from consumers were taste, colour, smell and texture which were answered by nine technical responses. These results would be a basic term of sustainable of supply chain in processed cassava products. In term of supply chain, production execution and quality control as processing activities have strong correlation to all items of technical response, followed by capacity planning and production and inventory control, and also raw material procurement activities. Source

Anam K.,University of Jember | Anam K.,University of Technology, Sydney | Al-Jumaily A.A.,University of Technology, Sydney
Procedia Engineering | Year: 2012

To get a compliant active exoskeleton controller, the force interaction controllers are mostly used in form of either the impedance or admittance controllers. The impedance or admittance controllers can only work if they are followed by either the force or the position controller respectively. These combinations place the impedance or admittance controller as high-level controller while the force or position controller as low-level controller. From the application point of view, the exoskeleton controllers are equipped by task controllers that can be formed in several ways depend on the aims. This paper presents the review of the control systems in the existing active exoskeleton in the last decade. The exoskeleton control system can be categorized according to the model system, the physical parameters, the hierarchy and the usage. These considerations give different control schemes. The main consideration of exoskeleton control design is how to achieve the best control performances. However, stability and safety are other important issues that have to be considered. © 2012 The Authors. Source

Ma'ruf M.F.,University of Jember
Ecological Engineering | Year: 2012

Apus bamboo (Gigantochloa Apus) is one of predominant vegetation in Indonesia. Direct shear test with large box sample was utilized to investigate shear strength behavior of Apus bamboo reinforced soil. Soil-root volume ratio is proposed to quantify root density at soil mass. The results show that peak shear strength of bamboo root reinforced soil increase with increasing soil-root volume ratio. Their relationships could be approached linearly. Though soil-root volume ratio investigated was only up to 5%, it generated up to 55% additional peak shear strength. © 2012 Elsevier B.V. Source

Musa K.H.,University Sidi Mohammed Ben Abdellah | Abdullah A.,University Sidi Mohammed Ben Abdellah | Kuswandi B.,University of Jember | Hidayat M.A.,University of Jember
Food Chemistry | Year: 2013

A stable chromogenic radical 2,2-diphenyl-1-picrylhydrazyl (DPPH) is commonly used for the determination of antioxidant activity. In this paper, DPPH was dried into 96 well microplate to produce DPPH dry reagent array plate, based on which the highly sensitive and high throughput determination of antioxidant activities was achieved. The spectrophotometric characterization of the microplate containing dried or fresh DPPH free radicals was reported. The response of the DPPH dry reagent array towards different standard antioxidants was studied. The reaction for DPPH in fresh or dry reagent array with Trolox was reported and compared. The DPPH dry reagent array was used to study the antioxidant activity of banana, green tea, pink guava, and honeydew and the results were compared to the samples reacted with freshly prepared DPPH. The proposed method is comparable to the classical DPPH method, more convenient, simple to operate with minimal solvent required and excellent sensitivity. © 2013 Elsevier Ltd. All rights reserved. Source

Hariadi Y.,University of Tasmania | Hariadi Y.,University of Jember | Marandon K.,Polytechnic Institute of LaSalle Beauvais | Tian Y.,Northeast Normal University | And 2 more authors.
Journal of Experimental Botany | Year: 2011

Ionic and osmotic relations in quinoa (Chenopodium quinoa Willd.) were studied by exposing plants to six salinity levels (0-500mM NaCl range) for 70d. Salt stress was administered either by pre-mixing of the calculated amount of NaCl with the potting mix before seeds were planted or by the gradual increase of NaCl levels in the irrigation water. For both methods, the optimal plant growth and biomass was achieved between 100mM and 200mM NaCl, suggesting that quinoa possess a very efficient system to adjust osmotically for abrupt increases in NaCl stress. Up to 95% of osmotic adjustment in old leaves and between 80% and 85% of osmotic adjustment in young leaves was achieved by means of accumulation of inorganic ions (Na+, K+, and Cl -) at these NaCl levels, whilst the contribution of organic osmolytes was very limited. Consistently higher K+ and lower Na+ levels were found in young, as compared with old leaves, for all salinity treatments. The shoot sap K+ progressively increased with increased salinity in old leaves; this is interpreted as evidence for the important role of free K+ in leaf osmotic adjustment under saline conditions. A 5-fold increase in salinity level (from 100mM to 500mM) resulted in only a 50% increase in the sap Na+ content, suggesting either a very strict control of xylem Na+ loading or an efficient Na+ removal from leaves. A very strong correlation between NaCl-induced K+ and H+ fluxes was observed in quinoa root, suggesting that a rapid NaCl-induced activation of H+-ATPase is needed to restore otherwise depolarized membrane potential and prevent further K+ leak from the cytosol. Taken together, this work emphasizes the role of inorganic ions for osmotic adjustment in halophytes and calls for more in-depth studies of the mechanisms of vacuolar Na+ sequestration, control of Na+ and K+ xylem loading, and their transport to the shoot. © 2010 The Author. Source

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