Multimode multiband power amplifier with tapped transformer for efficiency enhancement in low power mode

Multimode multiband connectivity has become a defacto requirement for smartphones with 3G WCDMA/4G LTE applications. In this research, a two-stage multimode multiband (MMMB) power amplifier (PA) with multiple gated transistor (MGTR) and configurable tapped transformer is designed and analysed in view of enhancing the efficiency in low power mode. The designed MMMB PA offers a 900MHz of operating bandwidth starting from the frequency of 1400MHz up to 2300MHz, covering 16 LTE FDD bands with peak output power of 27.8dBm and peak PAE of 31% in the high power mode. In low power mode, the PA offers the same bandwidth with peak output power of 25.5dBm and PAE of 30%. Use of the multiple gated transistor with tapped transformer for matching has increased the PAE in low power mode by 19% compared with that PAE in the high power mode

Wireless power transfer with on-chip inductor and class-E power amplifier for implant medical device applications

The popular use of biomedical implants has been going on in numerous applications that include the use of pacemakers and emerging retina prostheses, together with brain-computer interfaces. Other popular uses include drug delivery and smart orthopaedic implants. The avoidance of batteries or piercing wirings has made the wireless powering of these implantable devices highly attractive. In this paper, a design of a class-E power amplifier which has inductive loading appropriate for implant application was made using 130nm Silterra CMOS process at 2.4V supply. A presentation of high-Q on-chip inductors is made as a way of improving the efficiency of the wireless power transfer (WPT) system at 37.5MHz industrial, scientific and medical (ISM) band. Wireless power transfer efficiency of 59-89% is obtained for distance variation up to 10mm of the implant coil from the transmit power coil. DC voltage of more 3V is obtained for distance up to 10mm of the implant coil; and the on-chip implant inductor measures a smaller size of 10mm×10mm making the design more suitable for the application of medical implant

What motivate Muslim consumer to patronage Islamic based–retail store?

There is a significant trend among Muslim consumers in reverting to Islamic way of life.The phenomenon somehow affected the Malaysian retail industry with specialty Islamic stores mushrooming, and retailers customizing retail elements to win the Muslim consumers segment. As the mainstream studies on retailing acknowledges the adaptation of retail elements to suit consumers’ segment, there are less report on customizing retail elements to religious consumer group such as Muslim consumers’ segment.Thus, little is understood of consumers’ patronage motives and their expectations of retail Islamic stores.The aims of this study are twofold: To explore Malaysian Muslim consumers’ expectations of Islamic-based retail store; and their motive to patronize an Islamic-based retail store. Findings from interviews, conducted in the Northern region of Malaysia, suggests unique religion-related patronage motives.This study shares some initial insight into criteria for Islamic retail-based segmentation for Muslim consumers.Implications and limitations of the study are also discussed

A low power multiplexer based pass transistor logic full adder

In this paper, a high-speed low-power full adder design using multiplexer based pass transistor logic featuring full-swing output is proposed. The adder is designed and simulated using the industry standard 130 nm CMOS technology, at a supply voltage of 1.2 V. The obtained Power Delay Product (PDP) of its critical path is 29×10-18 J and its power consumption is 2.01μW. The proposed full adder is also capable to function at lower supply voltages of 0.4 V and 0.8 V without significant performance degradation. The proposed adder when cascaded in a 4-bit ripple carry adder configuration, its power, delay and PDP performance are better than the other adders making it suitable for larger arithmetic circuits

Electrical generation of dye-sensitized solar cells using sensitizer from rose flower

Dye-sensitized solar cell (DSSC) is part of the thin film family that consists of a TiO2 electrode coating which acts as a photo electrode, sensitizer from dye molecules soaked in the TiO2 film, electrolyte layer and a counter electrode. This paper focuses on the usage of a sensitizer from the rose flower and will review some of the research conducted on dye sensitizers from other researcher. Rose flower also known as woody perennial of the genus Rosa, within the family Rosaceae is extracted and were used as sensitizer to fabricate dye sensitized solar cell (DSSC). The photoelectrochemical performance of Rose sensitized solar cell shows parameter of open circuit voltage, VOC, short circuit current, (ISC), fill factor (FF), solar cell efficiency (η), and peak absorbance rate as much as 0.13 V, 57.58 µA, 0.58, 0.85% and 3.5 at 550nm respectively. The photoelectrochemical performance of DSSC and the usage of natural sensitizer from Rose flower dye demonstrate good potential to be applied as a sensitizer yet detail investigations are essential in terms of its applicability for long term application

Performance comparison between dyes on single layered TiO2 dye sensitized solar cell

Dye Sensitized Solar Cells (DSSC) is another kind of solar cell from the third generation that forms a photovoltaic. DSSC is designed to reduce cost from usage of expensive material in conventional solar panels. The purpose of this project is to fabricate and compare dye sensitized solar cells (DSSC) by using organic dye from blueberry and blue dye from chemical substances. The DSSC is fabricated using ‘Doctor Blade’ method. Results are based on investigating the electrical performance and characteristic of the fabricated TiO2 solar cell based on these comparisons of dyes in order to investigate the potential of organic dyes as a light absorbing mechanism. The required data that is investigated are the open circuit voltage, Voc, short circuit current, Isc, fill factors, solar cells efficiency and UV absorption. Result shows good potential in the blueberry dyes as a sensitizer but further investigation is needed in order to fully understand the characteristic of these organic dyes

A review: milk spoilage and staleness detection approaches, technique, and technology trends

Milk is one of the primary food nutrition consumed by almost all countries globally. The milk is commonly packed with several containers such as carton, can, glass bottle, and pet bottle. The milk, however, has limited time for the buyer to consume it, as it has an expiring date. The expired date could be unclear and uncertain as the milk could be spoiled by itself according to how we kept it after the first container was opened. To encounter the milk spoilage and staleness problems, many research works were proposed from 1949 until recent for having a sound system on detecting the milk. Since this food safety and quality is one of the crucial areas, this paper analyzes the trends and approaches towards milk spoilage and staleness detection systematically. The category of the detection system, sensor technology, ingredient technology, image processing technique, and deep learning technique will be discussed technically. The paper also provides a brief comment and idea on the existing methods conducted by the previous researcher in their work. Finally, this paper will conclude the milk spoilage and staleness detection system trends and predict what could happen in a few years facing the industrial revolution 4.0

The first Malay database toward the ethnic-specific target molecular variation

BACKGROUND:The Malaysian Node of the Human Variome Project (MyHVP) is one of the eighteen official Human Variome Project (HVP) country-specific nodes. Since its inception in 9(th) October 2010, MyHVP has attracted the significant number of Malaysian clinicians and researchers to participate and contribute their data to this project. MyHVP also act as the center of coordination for genotypic and phenotypic variation studies of the Malaysian population. A specialized database was developed to store and manage the data based on genetic variations which also associated with health and disease of Malaysian ethnic groups. This ethnic-specific database is called the Malaysian Node of the Human Variome Project database (MyHVPDb). FINDINGS:Currently, MyHVPDb provides only information about the genetic variations and mutations found in the Malays. In the near future, it will expand for the other Malaysian ethnics as well. The data sets are specified based on diseases or genetic mutation types which have three main subcategories: Single Nucleotide Polymorphism (SNP), Copy Number Variation (CNV) followed by the mutations which code for the common diseases among Malaysians. MyHVPDb has been open to the local researchers, academicians and students through the registration at the portal of MyHVP ( http://hvpmalaysia.kk.usm.my/mhgvc/index.php?id=register ). CONCLUSIONS:This database would be useful for clinicians and researchers who are interested in doing a study on genomics population and genetic diseases in order to obtain up-to-date and accurate information regarding the population-specific variations and also useful for those in countries with similar ethnic background

Pensejarahan Melayu: Kajian tentang tradisi sejarah Melayu Nusantara

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