Engineering

Geometrical modelling of orthogonal/layer-to-layer woven interlock carbon reinforcement
For the present work, we have studied the mesostructural geometry of orthogonal/layer-to-layer carbon–glass reinforcements woven on a conventional loom. The geometry of such woven reinforcements can be categorized in terms of crimp amplitude and cross-sectional shape of the warp and weft tows. These two vary with the structure of the woven fabric. The study was meant to characterize their geo...


Simultaneous filling of through silicon vias (TSVs) with different aspect ratios using multi-step direct current density
In this study, a multi-step current density method was investigated to fill TSVs with different aspect ratios (⌀20  µ m × 120  µ m, ⌀30  µ m × 130 m, ⌀40  µ m × 140  µ m and ⌀50  µ m × 150  µ m) simultaneously without voids. First, the effects of current density and TSV size on the growth mode of electrodeposited Cu were investigated. The experimental ...
Flow instability of semicrystalline polymer melt during micro-injection molding
This work investigates the flow instability of thermoplastic polymer melt that occurs on the flow front when it enters micro-cavities. On the flow front, it was observed that small balls are formed and coalesce with each other, creating many micro-weld lines. The experimental results in this work showed occurrence of this phenomenon for polypropylene and polyamide but not for high density poly(...


Solar thermoelectric generators fabricated on a silicon-on-insulator substrate
Solar thermal power generation is an attractive electricity generation technology as it is environment-friendly, has the potential for increased efficiency, and has high reliability. The design, modelling, and evaluation of solar thermoelectric generators (STEGs) fabricated on a silicon-on-insulator substrate are presented in this paper. Solar concentration is achieved by using a focusing lens ...
A continuous flow micro filtration device for plasma/blood separation using submicron vertical pillar gap structures
This work demonstrates a continuous flow plasma/blood separator using a vertical submicron pillar gap structure. The working principle of the proposed separator is based on size exclusion of cells through cross-flow filtration, in which only plasma is allowed to pass through submicron vertical pillars located tangential to the main flow path of the blood sample. The maximum filtration efficienc...


Piezoelectric transduction of flexural modes in pre-stressed microbeam resonators
This paper reports on the optimization of the design of piezoelectric transducer elements integrated on doubly-clamped microbeam resonators utilized as (bio)chemical sensors. We report and emphasize the often forgotten influence of membrane stresses on defining the dimensions and optimal position of the piezoelectric transducer elements. The study takes into account stress induced structural ch...
One-finger gripper based on the variable van der Waals force used for a single nano/micro-sized object
This article presents the development of a one-finger gripper that uses a variable van der Waals force to grip, transport and actively release a single SiO 2 spherical-like nano/micro-sized object. The diameters of the objects used (spheres) were between 800 nm to 50  μ m. The van der Waals force becomes the dominant force for such objects (from 60 nN to 8  μ N) if the materials are n...

Validiation of Photometric Ellipsometry for Refractive Index and Thickness Measurements
We design and build a photometric ellipsometer that can be adjusted or modified to match specific needs for different experiments. To validate our setup, we test the system with glass substrates at multiple incident angles from 30° to 70°. The experimental data can then be fitted to the standard theoretical model for ellipsometry with a single interface, allowing the amplitude ratio (tan Ψ)...
Exploring the application of the Delphi method as a forecasting tool in Information Systems and Technologies research
The Delphi method has been used widely in clarifying decision-making based on the opinions of experts in all research areas. This study focuses on Information Systems and Information Technology (IS/IT) research area. Its aim is to explore the use of the Delphi method in topics related to IS/IT as a forecasting tool. A sizeable amount of research has been examined about IS/IT using the Delphi me...

A non-linear orthotropic hydrocode model for ultra-high molecular weight polyethylene in impact simulations
This paper presents detailed experimental characterization of quasi-static anisotropic directional strength properties as well as the shock behavior of ultra-high molecular weight polyethylene (UHMWPE) for the development of an advanced material model for this class of materials. Specifically, we consider Dyneema® HB26 – pressed from uni-directional (UD) tapes in a 0/90° stacking sequence. ...
A Novel Optimal Configuration form Redundant MEMS Inertial Sensors Based on the Orthogonal Rotation Method
In order to improve the accuracy and reliability of micro-electro mechanical systems (MEMS) navigation systems, an orthogonal rotation method-based nine-gyro redundant MEMS configuration is presented. By analyzing the accuracy and reliability characteristics of an inertial navigation system (INS), criteria for redundant configuration design are introduced. Then the orthogonal rotation configura...

Thermal Tracking of Sports Players
We present here a real-time tracking algorithm for thermal video from a sports game. Robust detection of people includes routines for handling occlusions and noise before tracking each detected person with a Kalman filter. This online tracking algorithm is compared with a state-of-the-art offline multi-target tracking algorithm. Experiments are performed on a manually annotated 2-minutes video ...
High Performance Relaxor-Based Ferroelectric Single Crystals for Ultrasonic Transducer Applications
Relaxor-based ferroelectric single crystals Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT) have drawn much attention in the ferroelectric field because of their excellent piezoelectric properties and high electromechanical coupling coefficients (d33~2000 pC/N, kt~60%) near the morphotropic phase boundary (MPB). Ternary Pb(In1/2Nb1/2)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3 (PIN-PMN-PT) single crystals also possess outstan...
Dropwise Condensation on Micro- and Nanostructured Surfaces
In this review we cover recent developments in the area of surface-enhanced dropwise condensation against the background of earlier work. The development of fabrication techniques to create surface structures at the micro- and nanoscale using both bottom-up and top-down approaches has led to increased study of complex interfacial phenomena. In the heat transfer community, researchers have been ...
Effect of corrugated beds on characteristics of submerged hydraulic jump
Hydraulic jump is generally helped in the dissipation of excess kinetic energy downstream of hydraulic structures such as gates, spillways, and weirs. This paper presents a comprehensive review of the available literature on the hydraulic jump properties on corrugated beds. In the present study the effect of spaced triangular strip corrugated bed on submerged jump characteristics has been exper...