Analysis of air humidity and temperature for post lightning circumstances

Lightning is a natural phenomenon that generates a high electric field during thunderstorm. It has been reported that lightning strikes amid storms can occur around 100 times per second. The atmospheric electric field is an imperative parameter during a thunderstorm. Therefore, monitoring the electric field and its parameters is the best way for local lightning forecast. The electric field monitoring data can validate the accuracy of weather prediction in a local area from meteorology department or by using equipment specially designed to measure this electric field that exists when the phenomenon of lightning occurs. In this paper, the relationship between lightning, air humidity and temperature is discussed to understand the post lightning effect on these electric parameters. Additionally, the characteristics of the parameters are observed and analysed

Sensor fabrications using inkjet distributions and analysis systems

Alternative for electrode fabrications were demonstrated. Interdigitated electrodes (IDE) on polyethylene terephthalate (PET) substrate using silver conductive ink were successfully fabricated. Nano-particle based conductive inks (Jet-600 C) which have wide range viscosity control were used in this study. Inkjet Distributions and Analysis Systems (IJDAS) is inkjet printing technology that allows for deposition of versatile thin films, the design of which can be changed from time to time. Printing method was using dropped-on-demand inkjet depends on the nozzles arranged in a single line. It has been shown that the silver ink with viscosity between 7 to 10cps is suitable for IDE fabrications on PET

Fluoropolymer as dielectric in organic field effect transistor (OFET)

Fluoropolymer is a type of dielectric material that have been used in fabricating Organic Thin Film Transistor (OTFT). Dielectric layer is one of the layers that make OTFT. It is the layer that sort the electric field that can be used. Fluoropolymer have unique characteristics that can be utilized for fabrication of OTFT. Fluoropolymer is low dielectric contact material which is needed in ultra-large-scale integration (ULSI) to breakdown the parasitic capacitance that affect the value of current flow. Drop cast technique has been used as depositing method on interdigitated electrode (IDE) on glass substrate. The length of the channel is varied to study the IV characteristic. Current- voltage (I-V) measurements have been used to measure the resistance at the different channel length. The value of resistivity can give some impact to the OFET device

Plantar pressure repeatability data analysis for healthy adult based on EMED system

This paper presents the repeatability data analyses and discusses the selection of the appropriate type of plantar pressure measurements for the EMED system with regards to Pressure Level Values (PLV) over the touch insole area of healthy adults. In this research, a participant with age 28 years old has been chosen as a sample to measure under foot pressure, it is conducted the test 20 times and took part in four types of plantar pressure clinical assessments, Dynamic (normal walking), Dynamic with load (normal walking, carrying 1.5 Kg), Static (Standing test), and Static with load (Standing, carrying 1.5 Kg). The analysis is implemented using a new approach of recognizing the measurements into 7 different levels of pressure that assigned with 7 colors by considering the image processing algorithm. Variance Coefficient (VC) check is adopted for the statistical analysis and the selection decision. The results highlighted that the overall pressure levels in dynamic with load category have a better variance as compared with three other categories of plantar pressure on this type of repeatability test. In conclusion, EMED system can be considered as an effective instrument to record plantar foot pressure measurements in such type of analysis

The role of medium on the assembly of carbon nanotube by dielectrophoresis

Dielectrophoresis (DEP) is an electrode-medium process used to control the movement of Carbon nanotubes (CNTs) within a solution under nonuniform electric fields. CNTs are typically dispersed into a solvent to form a homogeneous suspension in order to prevent their aggregation and to improve solubility. This paper starts with a short review of the techniques used to improve the compatibility of CNTs with a target medium. Then, direct and indirect variations in CNTs’ velocities as a function of DEP force were investigated, under different dispersion mediums, for a rectangular electrode pair with a 10 μm gap subjected to a 500 kHz AC signal with an amplitude of 10 V. The effects of changes in permittivity, conductivity, viscosity, and density of the medium were presented and discussed. Simulation results from this study were used to further clarify the role of the medium on the motion of CNTs during alignment using a DEP process prior to an actual alignment

Microdroplet electrowetting on flexible paper-based microfluidic chip

This paper reports about the study of microdroplet reaction in electrowetting technique, which takes place in between two planar plates of electrode activated beneath the conductive droplet, with a low-cost material of production. In this paper, we show the result of frequencies effect to the droplet’s velocity and contact angle by using the low-cost electrode material, which made from Aluminum sheet. The best frequency and voltage to be used with a 5μl droplet of 1400μS/cm KCl is 10Hz and 10Vpp respectively

Carbon based material for dye sensitized solar cells

Dye sensitized solar cells (DSSC) is the third generation of solar cells that promise a simple procedure and low cost material which can provide electricity by converting the light energy into electrical energy. DSSC is a sandwich-liked structure that consists of conducting electrodes, sensitizer and electrolyte. In this research, Carbon Quantum Dots (CQDs) and Reduction Graphene Oxide (RGO) are used as organic sensitizer for DSSC and then it will be examined by scanning electron microscopy, ultraviolet visible spectroscopy, Raman spectroscopy, and solar simulator to observe the optical properties, optical properties, quality and efficiency of DSSC respectively. The results show that RGO produce a higher efficiency compared to CQD as sensitizer in DSSCs