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The kinetics of leaching of a saprolitic ore from Indonesia by citric acid solution under atmospheric pressure was investigated. An examination of the effects of leaching temperature, citric acid concentration, pulp density and ore particle size on the dissolution rate ofnickel found that they all had significant influence on the rate. The highest nickel recovery (95.6 percent) was achieved under...
Watermarking scheme can be a solution to embed more than one type of watermark that has a different purpose. Signature watermark can be used to embed some ownership information that is resistant to attack (authenticity control). Meanwhile, reference watermark can be used to detect modifications on digital medical images (integrity control). In this paper, signature watermark is embedded in frequency...
Earthquake is one of the most destructive natural disasters that kill many people and destroy a lot of properties. Therefore, it is highly important to know well ahead the occurrence of earthquakes in order to reduce the number of victims and material losses. Earthquake prediction is one solution to reduce such disastrous effect. The Earth's electric field signal is one of potential features that...
The Earth's electric field signal is generated from the released energy through a sudden dislocation of the segment in the earth's crust. Many researchers have reported the use of parametric modeling technique for earth's electric field signal processing. The existing earth's electric signal processing based on parametric modeling technique has suffered from the noise. Therefore, the effective earth's...
Sebelas Maret University (UNS) as a member of a consortium for developing national electric vehicle (Mobil Listrik Nasional, in sort Molina). It is currently making a prototype electric vehicle. A battery is a major component in an electric vehicle and a supplier of energy to the Electric Vehicle (EV). Sebelas Maret University created a technology that was developed in the prototype Li-ion batteries...
Seismic electric signal (SES) is one of features for predicting earthquakes (EQs) because of its significant changes in the amplitude of the signal prior to the earthquake. This paper presents detailed analysis of SES recorded prior to earthquake that occurred in Greece in the period from January 1, 2008 to June 30, 2008. During this period of time 5 earthquakes were recorded with magnitudes greater...
Automatic Speech Recognition (ASR) for Arabic word has been developed in this work. The system has the ability to recognize word that is uttered by the speaker. In this paper, an approach using support vector machines (SVMs) for identifying Arabic word based on the speaker speech is proposed. The proposed SVMs-based Automatic Speech Recognition system is tested experimentally using words uttered by...
On March 11th 2011, the whole world was taken aback by another tragic experience of Tsunami triggered by a magnitude 9.8 earthquake in Japan. Just few days after that, on March 25th 2011, another earthquake of magnitude 6.8 hit Myanmar deaths and destructions. Despite the loss incurred on properties and human being, available data show that relatively few numbers of animals died during most natural...
Secure buildings are currently protected from unauthorized access by a variety of devices. Nowadays, there are many kinds of devices to guarantee the building security such as PIN pads, keys both conventional and electronic, identity cards, cryptographic and dual control procedures. However, these conventional devices can be stolen, forgotten, lost, guessed or impersonated with accuracy. Biometric...
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