THE EFFECTS OF GROUND WATER LEVEL FLUCTUATION ON SLOPE STABILITY BY USING SLOPEW

Jestin Jelani, Nur Amirah Adnan, Hapsa Husen, Mohd Nazrin Mohd Daud, Suriyadi Sojipto

 

Abstract

This study is a continuation of previous research work conducted by the author on the stability of man-made slope constructed in UPNM campus. This paper presents the effects of ground water level (GWL) fluctuation on slope stability by using numerical simulation program, SlopeW. Ground water rises were simulated from 5m below the ground until 10m above the ground. Soil samples were taken from the site and tested in laboratory and then were incorporated into the program. It was found that the stability of the slope decreased with an increase of GWL. The critical slip surface formed by each case study is categorised as deep seated with circular and non-circular shapes. 

 

CUBE POLYGON: A NEW MODIFIED EULER METHOD TO IMPROVE ELECTRIC CIRCUIT EFFICIENCY

Nurhafizah Moziyana Mohd Yusop, Nooraida Samsudin, Anis Shahida Mokhtar, Siti Rohaidah Ahmad, Aslina Baharum, Mohd Fahmi Mohammad Amran 

 

Abstract

Euler method is a numerical order process for solving problems with the Ordinary Differential Equation (ODE). It is a fast and easy way. While Euler offers a simple procedure for solving ODEs, problems such as complexity, processing time and accuracy have driven others to use more sophisticated methods. Improvements to the Euler method have attracted much attention resulting in numerous modified Euler methods. This paper proposes Cube Polygon, a modified Euler method with improved accuracy and complexity. In order to demonstrate the accuracy and easy implementation of the proposed method, several examples are presented. Cube Polygon’s performance was compared to Polygon’s scheme and evaluated against exact solutions using SCILAB. Results indicate that not only Cube Polygon has produced solutions that are close to identical solutions for small step sizes, but also for higher step sizes, thus generating more accurate results and decrease complexity. Also known in this paper is the general of the RL circuit due to the ODE problem.

 

A STUDY ON PRIVATE BROWSING IN WINDOWS ENVIRONMENT

Yamunah Kathiravan, Mohd Fahmi Mohamad Amran, Noor Afiza Mat Razali, Mohd Afizi Mohd Shukran, Norshahriah Abdul Wahab, Mohammad Adib Khairuddin, Mohd Nazri Ismail, Zuraidy Adnan, Muhammad Fairuz Abd Rauf

 

Abstract

Privacy has always been a constant concern for many people. Internet users are often worried about the browsing information that is left on their storage media. Web browsers were later introduced with a new feature called private browsing to overcome this issue. The private browsing mode is expected to behave as normal browsing session but without storing any data such as browser cookies, history, cache and passwords on the local machine. Unfortunately, previous researchers concluded web browser often failed to provide the intended privacy protection to their user. Along the way of this reviewing process, the weakness and downside of previous web browser vendors have been identified 

 

DEVELOPMENT OF A COMPOSITE PAVEMENT PERFORMANCE INDEX TO MONITOR THE PAVEMENT CONDITION IN UPNM

Muhammad Nur Arsyad Azman, Choy Peng Ng, Faridah Hanim Khairuddin, Neza Ismail, Wan Mohamed Syafuan Wan Sabri

 

Abstract

Road surface condition of a pavement is one of the most important pavements features as it affects the dynamic load of vehicles travelling on it, the quality of travel and the vehicle operating cost. It is important to maintain a good road surface condition in order to promote safety and to reduce traffic accidents and injuries. The Composite Pavement Performance Index (CPPI) is one of the important tool to measure the performance or condition of a pavement. By conducting pavement evaluation using the CPPI, civil engineers could prioritize the maintenance and rehabilitation which usually incurred a huge cost. In University Pertahanan Nasional Malaysia (UPNM), there is no proper maintenance and rehabilitation scheduled for the roads as there is no performance evaluation tool available to measure the pavement performance or condition. Thus, the objective of this study is to develop a Composite Pavement Performance Index (CPPI) to monitor the pavement condition and to rank the roads in UPNM. In order to develop the CPPI, road defects data were collected from 6 internal roads in UPNM. From the data collected, 4 major types of distresses: rutting, pothole, crocodile cracking and longitudinal cracking are more likely to occur on the pavements in UPNM. By measuring the growth of the distresses over a period of 6 months, the CPPI was developed to rank the roads in UPNM. Using the CPPI, this study demonstrated that the road connecting to the library building experienced the worst pavement deterioration in UPNM with a value of CPPI of 24. The condition of the pavement was classified as poor. Thus, it is recommended that the road connecting to the library building should be reconstructed to increase the safety for road users.

 

CHARACTERISTICS OF PHOTO-LUMINESCENT (PL) POWDER APPLIED WITH POLYESTER RESIN AS GLOW-IN-THE-DARK EMERGENCY SIGNAGE

Siti Khadijah Che Osmi, Vikneswaran Munikanan, Hapsa Husen, Zuliziana Suif, Maidiana Othman, Nordila Ahmad, Nur Amira Syuhaida Rizal

 

Abstract

During a disaster, the rescuer must reach the disaster area within the fastest time with the help of navigation tools. However, there might be some obstacles during the night time that make the evacuation of the victims difficult especially due to the bad weather. Hence, an attempt to produce glow-in-the-dark emergency signage to ease the evacuation process and to enhance visibility during night time is necessary. In this present study, particular emphasis is given to investigate the characteristic of photo-luminescent (PL)powder applied with polyester resin as glow-in-the-dark emergency signage. Five samples of signage were fabricated with different percentage of PL powder, i.e. 20%, 40%. 60%, 80% and 100% and mixed with 150g polyester resin. Three types of luminance test were performed to check the workability of the samples. The tests are physical appearance, one-hours illuminance test and afterglow duration tests. The result showed that the maximum lux meter reading was recorded in Sample 5 with 6 lux luminosity and provided the longest glow duration of the sample before completely off after 12-hours. Results proved that the highest percentage of the PL powder content, the longer the afterglow duration will be achieved. It also noted that the polyester resin could be a good binder of PL powder for producing the glow-in-the-dark emergency signage. 

 

ISSN: 2773-5281