The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The Internet of Things (IoT) comprises a complex network of smart devices, which frequently exchange data through the Internet. Given the significant growth of IoT as a new technological paradigm, which may involve safety-critical operations and sensitive data to be put online, its security aspect is vital. This paper studies the network security matters in the smart home, health care and transportation...
Active robot tracking system is one kind of utilization of tracking system on a mobile robot and widely used in many aspect such as security or military. With the widespread of application of robot tracking system, it is necessary that the development of this robot tracking system that facilitate future enhancement. However, problem of detecting the object, planning path and avoiding obstacles during...
The rapid development in agro-tech plays an important role in the production of greenhouse plantations for cultivating high-value fruits, flowers and vegetables. It is imperative to constantly monitor the optimal requirement for these high value crops in every phase of the plant growth to maintain the best production quality. However, to develop a fully automated system for a plant, needs optimum...
This research paper utilizes a 3D tetrahedral meshing frequency solver to simulate the electromagnetic effect of circular split asymmetric ring (CSAR) patterned onto a conventional microwave laminate. Behavior of the incident wave was first conducted using a bare flat metal laminate and then compared with a modified tip of CSAR surface. Comparison made between simulation and measured samples working...
The high voltage DC power supply widely used for space communication and for industry consist of multistage rectifier circuit. To produce 6KV output voltage, Cockroft-Walton multiplier circuits are applied by reducing number of stages from 1200 into 32 stages without using transformer. With the implementation of this technique, it can minimize the volume of the circuit to be integrated on a single...
The European Logarithmic Microprocessor (ELM) had been an outstanding breakthrough in logarithmic number system (LNS) research history. The processor successfully reaches the par ability of floating-point (FLP) processor with its rapid and accurate design towards FLP. The design was able to improve the LNS addition and subtraction procedure, which are the drawbacks of any implementation of LNS arithmetic...
Design of a fully integrated power amplifier (PA) with distributed active transformer (DAT) architecture is introduced in this paper. PA achieves high efficiency and high power performance necessary for long range internet of thing (IoT) wireless communication systems. The amplifier is implemented in a 0.18gm SiGe BiCMOS technology with 3.3 V supply voltage and achieves a peak output power of +32dBm...
Many FSO communication systems are using a conventional technique that is OOK technique in the system. Some enhancement of technique is explained in this paper to decrease the error rate that occurs in the system. The comparison between OOK technique and DDM technique is investigated in order to compare the error rate and power received. The result shows that the performance of DDM technique generates...
Combinatorial software testing involves more than one parameter interaction with each other. Input-output based relations (I OR) is one of the combinatorial testing's strategies. This form of testing is advantageous compared to others. IOR only focuses on program output and interactions between certain input values parameters. However, limited research is available for IOR strategy. Even though IOR...
A deep attenuation level and wide stopband bandwidth, sharp roll-off and low insertion loss in the passband using H-shaped defected microstrip structure (DMS) at open circuit stub resonator (OCSR) of the stepped-impedance low pass filter (SILPF) is presented in this paper. The proposed filter consists of H-shaped that is etching at the microstrip line of OCSR. The OCSR is embedded in the middle of...
Water based Remazol Orange was utilized as the dye sensitizer for dye sensitized solar cell. The annealing temperature of TiO2 working electrode was set at 450 °C. The performance of the device was investigated between dye concentrations of 0.25 mM and 2.5 mM at three different immersion times (3, 12 and 24 hours). The adsorption peak of the dye sensitizer was evaluated using UV-Vis-Nir and the device...
Insulation failure has been identified as one of the main reasons for transformer breakdown. As one the most important assets in the high voltage system, the loss of a power transformer will cause significant effects to consumers and on the system. The condition of the insulation can directly be correlated to the presence of Partial discharge (PD). Therefore, the ability to accurately detect and analyse...
A 3-bit Microelectromechanical system (MEMS) digital attenuator is designed with 0∼20GHz bandwidth, the attenuation ranges from 0 to 35dB with 5dB step. The attenuator, with the coplanar waveguide (CPW), is implemented by surface sacrificial layer technology. The DC-contact MEMS switches are placed around the T type resistor network (RN), making the switches in minimum number and the structure compact...
This paper proposes a multiband isolation of Double Pole Double Throw (DPDT) switch with switchable transmission line stub resonators for applications of WiMAX and LTE in 2.3 and 3.5 GHz bands. The transmission line stub resonator used in this design is an open stub resonator with quarter wave of the electrical length. By using a simple mathematical model, the theory of the transmission line stub...
This work is based on the development of LED using a circular chip of ZnSe. Proper analyses of the proposed LED are performed by adding optical transition and nonradiative recombination processes. The voltage applied to the ZnSe LED ranges from 0 V to 3.5 V. The current-voltage characteristic and the flow of current density are obtained. At 2.5 V, the carriers move towards n-contact hence reduces...
Jaundice is defines as yellow color of the skin in newborn infant. This health condition is common in newborn and happen due to overproduced of bilirubin. Jaundice clinically appears when the level of serum bilirubin rises beyond 250μmol/L (5 mg/dl). Jaundice could cause abnormalities in the newborn such as kernicterus and cerebral palsy. The advancement of Wireless Sensor Network (WSN) technology...
A progressive advancement in biosensors and wireless technology are the major contributors to the realization of continuous remote health monitoring system (RHMS). Wireless Body Area Network (WBAN) is part of this technology due to the deployment of multiple sensors such as Electrocardiogram (ECG) to collect vital body signals for processing and diagnosis. Among the benefits offered by this technology...
Remote monitoring system is a part of Internet of Thing (IoT) application whether in healthcare, logistic or even agriculture. The system consists of several nodes including wireless sensor node which is a compulsory end-device part in remote monitoring system for data acquisition and processing. This paper discusses the available design of wireless sensor node from different hardware and interfaces,...
Microfluidic structures are devices that are able to control fluids in the scale of micrometer and have been widely adapted in the application of lab-on-chip. There are many methods of producing microfluidic structures, with soft lithography and laser micromachine are the commonly reported techniques. This paper reports on the experiments conducted to investigate the formation of microfluidic structure...
This paper demonstrates the effect of haze condition on free space optical (FSO) communication and to thin out the attenuation effects. The effects in the main focus on the atmospheric attenuation effects due the visibility and link range (length). Visibility is the main concern in utilizing the FSO communication system. The higher visibility, the longer transmission link. Hence, FSO performance could...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.