Natural Frequency Analysis Of All Edges Clamped Flexible Thin Plate

In this paper, the analysis of natural frequencies for all clamped edges rectangular flexible thin plate is carried out using Finite Difference (FD) and Finite Element (FE) approaches. According to the literatures, the differential equation of plate was obtained by considering the Kirchhoff hypotheses and Newton’s law. The dynamic differential model is developed by using the FD to obtain the natural frequencies of given plate; for this purpose, a displacement model is converted to combination of sine and cosine functions in form of Fast Fourier Series. In second method, modes of vibration are driven by FE method using the ABAQUS software. The obtained natural frequencies of both methods are evaluated and compared with previous literatures; the outcomes can explain that the improved FD method’s results are more accurate in compare with FE method’s

Human mismatches in machining

This main objectives of this study were to examine human aspects of machining and to obtain an understanding of the issues within the broad context of manufacturing. Emphasis was placed on operator mismatches and the relationships of these to basic human characteristics and the preferred levels of automation from the operators' perspective with regard to turning operations. [Continues.

Evaluating The Performance Of Unconfined Compressive Strength Of Trong Clay Stabilized With Granite Sludge

This research paper aims to evaluate the potential usability of granite sludge as a stabilizer of Trong clay based on compressive strength. There are eight mixture combination between the clay and the stabilizer with ratios of 0, 1, 2, 3, 4, 5, 6 and 7 wt% granite sludge. The value of shear strength is obtained through unconfined compression tests performed in the laboratory. The research found that the performance of unconfined compressive strength increased with the percentage of stabilizer. Sample S7 which contains 7% granite sludge is found to yield the highest unconfined compressive strength of 585kN/m2. This is 187% higher than unstrengthened sample. This study found that, the compressive strength improved with increased granite sludge content in the soil mixture.

Benchmarking Process and Its Relationship with Organizational Performance

Benchmarking is recognized as an essential tool for continuous improvement of quality.Nowadays, many public sector organizations have been encouraged to implement benchmarking asone way of satisfying the government's requirement that public organizations provide best valueservices. This paper begins with discussion of the literature that is integrated to point out the generalbasis of the topic. Then, this study will address the questions of whether the factors that affectingsuccessful benchmarking has relationship with benchmarking process as well as whetherbenchmarking process will lead to improvement of organizational performance. Therefore, the studyhad interviewed officers that involved in benchmarking project within 35 local authorities inPeninsular Malaysia. Finally, this paper also focuses on the methodology and data analysis of thestudy

Wind speed on ultra high frequency (UHF) of radio signal

East coast of Peninsular Malaysia has received average wind speed up to 55km/h which equivalent to 15.4m per second and 30 knot, especially during monsoon. These circumstances had affected the radio signal by degrading its strength and quality. This study observe the relationship of wind speed and radio signal in Ultra High Frequency band. The statistical spearman correlation were applied and graph relationship of two variables were plotted in order to investigate these two variables. The measurement were done at 24 hour in February and July 2016 at Kusza Observatory. Analysis of result shown that high correlation strength (r = 0.555) was indicated in first of observation (1-O) at frequency of 382.5MHz. No high correlation were quantified in second of observation (2-O). These findings related to the observed high wind speed which is brought high of water vapor, hence attenuating the radio signal.Keywords: radio signal strength; wind speed; correlatio

Peer-mentors reflect on the benefits of mentoring: An autoethography

Many PhD candidates bring with them a wealth of knowledge and skills; however, these may not sufficiently prepare candidates to work with high autonomy on a project with often limited interaction with the wider research community. A peer-mentor program model, in which a mentor delivers dyadic and group support to higher degree by research students from different disciplines and backgrounds, has the potential to enhance candidates’ knowledge and skills. However, the mentors themselves can experience significant advantages, as peer-mentoring can also have a positive effect on the mentors’ research experience. In order to further understanding of the potential benefits of peer-mentoring for mentors, three researchers explore their experiences as peer-mentors through an autoethnographic framework. Through discussing their personal experiences as peer-mentors, the researchers identified a range of benefits for themselves. These benefits in-volved finding that peer- mentoring enhanced their own learning, fostered reflective practice, and provided current tertiary teaching and research support experience. Peer mentoring also gave them broad exposure to a breadth of disciplines, theories, and methods; provided project management insights; created opportunities for professional networking; supported their social needs; and gave them invaluable insight into other candidate/supervisor relationships. Their role in a peer-mentor model has shaped their experiences as PhD candidates and also informed their decisions after graduation

Study of dynamics of glass plasma induced by Nd:YAG laser in external magnetic field

A Q-switched Nd:YAG laser (1064 nm, 8 ns) is focused on glass target to generate plasma in the presence of external magnetic field in air. The variable transverse magnetic field is applied by an assembly of electromagnetic poles to create uniform magnetic field in the range of 0.1 to 0.8 T. In the absence of external magnetic field the plasma plume expands almost spherical, perpendicular to the target surface. In the presence of transverse external magnetic field there is an increase in radial expansion and plume confines in a certain region within magnetic field. The dynamics of glass plasma is investigated by capturing plume images by charged-coupled device CCD video camera. The images are captured for different values of applied magnetic field strength. The irradiated glass material is collected on aluminum substrate and surface morphology is analyzed by scanning electron microscopy (SEM)

Effect of maleated compatibiliser (PBS-g-MA) addition on the flexural properties and water absorption of poly(butylene succinate)/kenaf bast fibre composites

Poly(butylene succinate) (PBS) composites with 30 wt.% loading of kenaf bast fibre (KBF) were compatibilised with 5 wt.% maleated PBS (PBS-g-MA). The maleic anhydride (MA) concentration in the compatibiliser was either 3, 5, 7 or 10 phr. In general, the compatibilised composites showed better flexural properties than the un-compatibilised composite. The highest increment in the flexural strength and modulus of 12.7 and 8.9%, respectively, were obtained with the addition of PBS-g-MA with MA concentration of 5 phr. Compatibilised and un-compatibilised PBS/KBF composites were immersed in distilled water for 90 days. The absorption of water by all the composites was observed to follow Fick’s law. The equilibrium moisture content, Mm, of the composites with PBS-g-MA at 3, 5 and 7 phr of MA concentrations was lower than that of the un-compatibilised composite due to improved fiber-matrix interfacial adhesion and reduction of voids content. Both un-compatibilised and compatibilised composites showed dimensional instability after the water absorption. This was probably due to the degradation of the fibre-matrix interfacial adhesion and fibre integrity. The flexural properties of these composites decreased after the water absorption. After re-drying only some of the flexural properties were recovered from plasticizing effect of water

Characterization of flow rate and Heat Loss in Heating, Ventilation and Air Conditioning (HVAC) Duct System for Office Building

A building is an assemblage that is firmly attached to the ground and provides the performance of human activities and need to be considered in the daily operation in that building. The improvements in building performance are focused on improving the energy efficiency of buildings. This is approach by designing heating, ventilation and air conditioning (HVAC) duct system due to one of the most utilized energy in maintaining building performance and environment. The objectives of this research is to calculate the air (CFM) supply in office building, to characterize the velocity and head loss in a round and rectangular HVAC ducting system at various duct thickness and to optimize the thickness of the duct in HVAC system according to ASHRAE Standard. The increasing of velocity in duct system shows the increasing of head loss. The round duct design gives the lowest velocity and head loss in HVAC system approximately around 9.35% as compared to rectangular duct at 0.06 inches thickness. Hence, the trends of the head loss and duct thickness has influenced in reducing noise in HVAC duct system in order to select the best design concepts which is round shape design

Prolong placement of tracheostomy tube causing unusual complication

Tracheostomy can be associated with numerous complications. Here, we present a case of large hypertrophic skin of tracheostoma with tracheal granulation tissue causing malpositioning of tracheostomy tube and airway obstruction, secondary to prolong placement of a cuff tracheostomy tube due to improper tracheostomy care. This case illustrates that awareness and knowledge of proper tracheostomy tube care among medical personnel are very important to avoid any mismanagement that can cause life-threatening complications