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An intelligent software defined networks controller component to detect and mitigate denial of service attacks.
No full textDoes university students prefer printed reference book over online materials? A case study of Private Higher Learning Institution
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Nilai dan strategi unggul pemimpin dalam menangani masalah ekonomi : analisis daripada kisah Nabi Yusuf
No full textIoT based disabled parking system (DiParkSys) v2.0 Arduino Uno
No full textThe urbanization in the urban area can lead to many effects, and one of them is limited parking space. In the context of disabled parking spaces, many easily violate that allocated spaces without guilty. For the authorities to monitor the violation of the disabled parking spaces are quite challenging. That is, the authorities would still need to look out for the parking violation by manually observing and looking around, in other words, through their observation. The purpose of this study is to improve the current Disabled Parking System (DiParkSys) v2.0 by integrating it with GSM notification system. The GSM module assembled in DiParkSys will immediately notify authorities of any violation by giving the coordinate of the violated parking slot. The prototype was first designed using system visualization and schematic diagram. The integration between the alarm and GSM module was then validated using an integration test before the functionality of the prototype was tested using a Test Cases method
Design of an environmental stress cracking (ESC) tester using fracture mechanics approach
No full textIn this research, an ESC tester machine was built by utilising a fracture mechanics approach. The machine consists of critical components such as an aluminium frame, 3D printed pulley and bracket, DC motor, Arduino microcontroller, and fasteners. The test was performed by securing an
acrylic sample using a hook fixed to bracket on the base of the frame and integrated load cell with Arduino microcontroller board. Digital camera was used to capture images with Image J processing software to measure the transient damage area and macro-crack length development at each test
condition. The results suggested that the applied load can influence the fracture toughness values. At 55N, the fracture toughness for the acrylic was 1.9 MPa.m1/2. Increasing the load to 65N, the fracture toughness dropped by 60% to 0.7 MPa.m1/2. The minimum fracture toughness was observed at 85N loada 91% reduction was recorded. Maximum damage area of 89 mm2 was
recorded for sample tested at 55N while minimum damage area was at 85N load, where only 31.81 mm2 area was calculated. It can be concluded that this newly built machine can be used to perform fracture toughness test on polymeric materials under environmental stress cracking (ESC) condition
Effect of geometry of stenosis on the computation of flow characteristics of unsteady blood flow in a collapsible vessel
No full textThis paper discusses the effect of different geometric representations of stenosis on the numerical solution of one-dimensional unsteady blood flow in stenotic blood vessel (or stenosis) taking into account fluid-structure interaction. In the formulation, a collapsible pressure-area constitutive relation is added to the coupled mass and momentum equations to allow for the interaction between the cross sectional area, volumetric flow rate and pressure of the flow and hence the prevalence of the one-dimensional fluid-structure interaction. The formulation is stabilized by employing Streamline-Upwind Petrov-Galerkin scheme. Non-reflecting boundary conditions are imposed based on the method of characteristics. Flow characteristics and the geometrical effects of the stenosis are then discussed. Numerical results show that stenosis with irregular shape is more prone to collapse as compared to the smooth one for a given baseline conditions. This study, thus, highlights the importance of representing the shape of the stenosis as close as possible as it might give information otherwise missing in the simplistic smooth representation of the stenosis
Photocatalytic degradation of methylene blue dye solution using different amount of ZnO as a photocatalyst
No full textZinc oxide (ZnO) powder was used as a photocatalyst for the photocatalytic degradation of
methylene blue (MB) dye solution. In this study, different amount of ZnO (10, 20 and 30 mg) as
photocatalyst was used to investigate the performance of photocatalytic degradation of MB dye
solution. The morphology and structural properties of ZnO powder were studied by X-ray
diffraction (XRD) and Field Emission Scanning Electron Microscope (FESEM) techniques. The
photocatalytic activities of the ZnO powder were investigated by degrading the MB dye solution
under UV light irradiation at different amounts of ZnO photocatalyst. The percentage degradation
of MB dye solution in the presence of 10 mg ZnO powder was found to be the highest at 96.2 %
within 60 min irradiation compared to 20 and 30 mg of ZnO powder. The photodegradation rate
constants, k obtained in this study were 0.0661, 0.0558, and 0.0507 min-1 for 10, 20, and 30 mgZnO powder, respectively that follow the pseudo first-order reaction kinetics
Assessment of subclinical mastitis effects on live weight, body condition score (BCS) and external udder measurements of dorper sheep
No full textMastitis is an inflammation of the mammary gland that can be classified as clinical and subclinical mastitis. The clinical mastitis can be diagnosed based on clinical signs, whilst subclinical mastitis mostly through somatic cell count (SCC). This study was carried out to determine the subclinical mastitis effects on live weight, body condition score (BCS) and external udder traits of Dorper sheep. A total 16 Dorper ewes were selected and screened for mastitis using the Californian mastitis test (CMT). The live weight, BCS and external udder traits (i.e. udder length (UL), udder width (UW), rear udder depth (RUD), cistern depth (CD) and teat length (TL) of the ewes were measured. The subclinical mastitis did not affect the live weight and BCS of Dorper ewes. Whilst for external udder measurement