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mpeleehp's blog

Postdoc/Research Fellow for thermo/flow simulations

Submitted by mpeleehp on

I have an opening for a research fellow for two years from Jan 2023 to Dec 2024. The candidate should have the experience of perfroming multi-physics simulations using comsol for the design of a referator system  incorporating LED lightings for the storage of vegetables. The candidate will also need to interact with commercial vendor for the fabrication and installation of the final product. The candidate should have a PhD in Mechanical Engineering or equivalence with the relevant experience in thermo/fluid mechanics. 

Postdoc/Research Fellow for computational mechanics of all solid state battery at the Department of Mechanical Engineering, National University of Singapore

Submitted by mpeleehp on

I have an opening for a postdoc/research fellow for the modeling and simulations of all solid state batteries. The candidate should have the expertise for modeling and simulations using abaqus, and also familiar with the use of representative volumetirc elements. The opneing will be available from Jan 2023 for a duration of two years. Those who are interested can send the CV and relevant publications to Professor Heow pUeh LEE at mpeleehp [at] nus.edu.sg

Two Postdoc positions for acoustics at the Department of Mechanical Engineering, National University of Singapore

Submitted by mpeleehp on

I am recruting two Postdocs/Research Fellows for research in sonic cage study. The candidates are required to have some experience in one of more of the following aspects:

1. acoustic simulations using comsol.

2. acousitc measurements using impedance tube. 

3. data acquisition and analysis. 

One of the openings will be available from July 2022 for a duration of three years. The second opening will be available from Jan 2023 for a duration of two years. 

Sinus ventilation due to accessory ostia

Submitted by mpeleehp on

There is an anceint saying "A room of many doors will be windy, a person of many works (talkative) will bring disaster". Can this saying be applicable to special cases of maxillary sinus with accessary ostia? Tppically a sinus only has one opening, known as ostium. The air, mucus, can only enter and discharge via this single opening. However, for some, the sinus may have multiple openings, known as accessory ostium. In the work below, we use computaitonal fluid dynamics to examine the effect.

Recent Advances in Acoustic Metamaterials for Simultaneous Sound Attenuation and Air Ventilation Performances

Submitted by mpeleehp on

In the past two decades, acoustic metamaterials have garnered much attention owing to their unique functional characteristics, which are difficult to find in naturally available materials. The acoustic metamaterials have demonstrated excellent acoustical characteristics that paved a new pathway for researchers to develop effective solutions for a wide variety of multifunctional applications, such as low-frequency sound attenuation, sound wave manipulation, energy harvesting, acoustic focusing, acoustic cloaking, biomedical acoustics, and topological acoustics.

Dual-functional metamaterial with vibration isolation and heat flux guiding

Submitted by mpeleehp on

Metamaterials can provide many engineering applications such as vibration attenuation and heat flux cloaking. However, the problems of isolating elastic waves and directing heat flux via a metamaterial device have not been resolved completely yet. In this paper, a dual-functional metamaterial, with cylindrical stub periodically attached on the multilayered plate, is initially designed and investigated numerically and experimentally. Numerical results demonstrate that the elastic wave band gaps can be opened and tuned effectively with the evolution of the rotation angle of the matrix plate.

Effects of long-duration wearing of N95 respirator and surgical facemask: a pilot study

Submitted by mpeleehp on

The protection efficacy of facemasks and respirators has been well documented. The change of human nasal functions after wearing N95 respirator and surgical facemask is not known. In a parallel group study, we recruited 87 healthy healthcare workers. Each of the volunteers attended two sessions, and wore N95 respirator in session 1 (S1) and surgical facemask in session 2 (S2) for 3hours. Mean minimum cross sectional area (mMCA) of the two nasal airways via acoustic rhinometry and nasal resistance via rhinomanometry were measured before and immediately after the mask wearing.