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A Roselle blend chitosan film sensor (RBFS) with different concentration of roselle has been developed. Electrochemical deposition has been chosen as an efficient technique for the fabrication of RBFS. RBFS with the concentration of 20cc of roselle has a stable value to detect the different concentration of fertilizer ranging from 0 ppm until 60 ppm. The type of fertilizer used in this testing was magnesium sulphate. The electrical laboratory testing result of the RBFS exposed to de-ionised water (DIW) showed the highest response with the value ~94%. The highest response value of RBFS exposed to magnesium sulphate with the concentration of 10 ppm was ~66%. The lowest response value of RBFS exposed to magnesium sulphate with the concentration of 60 ppm was ~30%. The results have been proven that RBFS is able to differentiate the concentration of fertilizer. The RBFS fulfils all the reliable sensing properties which include excellent response time, stability, repeatability, recovery, and selectivity. The morphological surfaces of RBFS were observed with SEM and chemical interactions between roselle blend chitosan were explained using FTIR spectra results. SEM image of RBFS showed the film surface was compact and the roselle was well distributed within the chitosan.

Contamination exceeds the standards in certain areas within the production line of hard disk drive (HDD) manufacturing, such as in the clean room of a factory. In order to find the cause(s) and solve the problem, we decided to use the computational fluid dynamics (CFD) to simulate the airflow within the production line. The results show the cause of contamination, which is from the exhaust fan installed in the electrical testing machine in the production line of HDD manufacturing, which releases large amounts of particles. To resolve this problem, the CFD results were analyzed to design and create a new cover for the exhaust fan. Once this invention is installed to the electrical testing machine, it can control the airflow to float into other areas that do not affect nor contaminate the product. The factory utilized this research. Other than solving contamination problems that exceed standards, it also saves production costs from purchasing new machines as well.

This article reported on the pixel flaw detection properties of amorphous In-Ga-Zn-O-based active thin film transistors on flexible medical panel substrate application, which is using the non-invasive optoelectronic transforming inspection technique. The experimental data exactly showed good flaw detection rate > 90% and stable uniformity < 5%. Currently, it is a popular method with electrical testing and detection with advantages of ultrahigh resolution and small-pixel-sized medical panel, and no contact damaged to the application of flexible medical panel substrates.

Neste trabalho foram estudadas as series de ligas La0,7Mg0,3Al0,3Mn0,4Co(0,5-x)NbxNi3,8 (x =0 a 0,5) e La0,7Mg0,3Al0,3Mn0,4Nb(0,5-x)Ni(3,8-x) (x =0,3; 0,5 e 1,3), como eletrodo negativo de baterias de Níquel Hidreto Metálico. A pulverização das ligas foi realizada com duas pressões de H2 (2 bar e 9 bar). A capacidade de descarga das baterias de níquel hidreto metálico foi analisada pelo equipamento de testes elétricos Arbin BT-4. As ligas, no estado bruto de fusão, foram analisadas por microscopia eletrônica de varredura (MEV), espectroscopia de energia dispersiva (EDS) e difração de raios-X. Com o aumento da concentração de nióbio nas ligas nota-se a diminuição da estabilidade cíclica das baterias e da capacidade máxima de descarga. A capacidade de descarga máxima obtida foi para a liga La0,7Mg0,3Al0,3Mn0,4Co0,5Ni3,8 (45,36 mAh) e a bateria que apresentou a melhor performance foi a liga La0,7Mg0,3Al0,3Mn0,4Co0,4Nb0,1Ni3,8 (44,94 mAh). In this work were studied La.7Mg0.3Al0.3Mn0,4Co(0.5-x)NbxNi3.8 (x= 0 - 0.5) and La0,7Mg0,3Al0,3Mn0.4Nb(05+x)Co0,5Ni(3.8-x). (x=0.3; 0.5;1.3) alloys for negative electrodes of the Nickel-Metal Hydride batteries. The hydrogenation of the alloys was performed varying pressing of H2 (2 and 9 bar). The discharge capacity of the nickel-metal hydride batteries were analyzed in the Arbin BT-4 electrical test equipment. The as-cast alloys were analyzed by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDX) and X-Ray diffraction. The increasing Niobium addition in the alloys decreased cycle life and the maximum discharge capacity of the batteries. The maximum discharge capacity was obtained with the La.7Mg0.3Al0.3Mn0,4Co0.5Ni3.8 (45.36 mAh) and the battery which presented the best performance was La.7Mg0.3Al0.3Mn0.4Co0.5Nb0.1Ni3.8 (44.94 mAh).

The useful life of an electrical generator is directly related to the condition of the winding insulation. Non-invasive methods to assess the condition of insulation systems are typically limited to physical inspections, drawing inferences from a review of operating conditions and maintenance records, and from the results of on-line and off-line electrical testing. This paper identifies when to perform off-line electrical testing, notes testing standards and fundamentals, provides a description of the commonly performed tests and pass/fail criteria, supplies some framework to aid project staff in deciding over-potential test voltages, and articulates the implicit trade-off in over-potential testing.

Many researches reveal that proteins have the property of piezoelectricity. Therefore, the study presents the concept of energy harvester made of natural spider silk. Moreover, with high density of protein, spider silk can produce more strong and stable piezoelectric property through the polarization technology. The major ampullate gland of native Nephila pilipes was chosen as the silk source in this study, and it was examined by Flourier transform infrared spectroscopy (FTIR), and electrical testing. FTIR reveals the polarized silk increases significantly at the peak of 1610 cm−1 to 1660 cm−1. It means that polarized silk has better α-helix and s-sheet arrangement than non-polarized ones. The result of the electrical testing shows that the output voltage of polarized silk has 3.485 times higher than that of non-polarized silks. Thus, Taiwan local Nephila pilipes spider silks show great potential in energy harvester due to its piezoelectricity.

In this work, a CMOS transistor array is presented, which allows performing process variability, Random Telegraph Noise and BTI/CHC aging characterization in a single chip. The array, called ENDURANCE, integrates 3136 MOS transistors, for single and massive electrical testing. This chip, together with a dedicated measurement set-up, allows programming any of these electrical tests, considerably reducing the total time needed for aging measurements by using a parallelization technique.

Safe operation of electrical power network relies on healthy electrical insulation of all of its components. In general, the condition of insulation is unknown and appropriate periodic electrical testing is required to detect potential deterioration and avoid catastrophic failure of the given system.

A PoF approach to mitigating infant mortality is proposed which includes (1) conducting reliability capability and product maturity analyses; (2) identifying defects through non-destructive analysis, if possible; and (3) developing electrical tests to screen out early failures. The non-destructive analysis approach was outlined using die attach in a power module as a test bed, while the electrical testing approach was outlined using film capacitors. More data is being gathered to validate that the electrical test provides an early differentiation of change in capacitance over time between good and defective capacitors.

Novel freestanding foils of vertically aligned carbon nanotube arrays (VANTAs) fused with metals are fabricated in a scalable four-step process of (1) VANTA synthesis, (2) deposition of partially infused metal film, (3) removal from growth substrate, and (4) optional deposition of a second metal film on the back side. Mechanical and electrical testing demonstrates excellent contact between the VANTA and the interface-infused metal layers.

Copper pillar WLCSP device embedded in large PCB module with passive devices to create one hybrid package are growing widely in smart communication and mobile electronic devices. The crucial challenges in electrical testing and failure analysis on it are to remove the embedded copper pillar CSP device from the module without inducing mechanical defects, and solder ball placement on the CSP for ATE testing. This paper discusses the sample preparation process step-by-step, which includes de-soldering of external components from the PCB, top side up and down parallel polishing to remove copper pillars, chemical etching the PCB module, solder ball placement on CSP devices and the soldering process on a plain coupon board. The established process enables electrical testing, evaluations and failure analysis performed on a demounted CSP device. A simulation of an electrical testing and failure analysis will also be highlighted in this paper.

Nondestructive testing is an important means for assessment of performance of winder ropes. The visual method produces a possibility for inadequate inspection due to its subjectivity. Wire ropes wear out eventually, gradually losing work capability throughout its useful life making periodic inspections, lubrication and tensioning necessary. Magnetic flaw detectors are used to determine rope wearing. They measure loss of metallic area and detect the local faults like broken wires and other faults of the ropes. An attempt has been made in this paper to evaluate the performance of one cage winder rope in a mechanized coal mine in India using nondestructive testing instrument.