216 research outputs found
Author Correction: Hydrogel mechanical properties in altered gravity (npj Microgravity, (2024), 10, 1, (83), 10.1038/s41526-024-00388-2)
No full textIn this article the affiliation, “Department of Aerospace Engineering, Khalifa University of Science and Technology, Abu Dhabi 127788, UAE” for the author “Yarjan Abdul Samad” was inadvertently omitted. The original article has been corrected
ANALISIS ASPEK KEMASYARAKATAN MELALUI PEMIKIRAN A. SAMAD SAID DALAM NOVEL DAERAH ZENI DAN HUJAN PAGI
No full textAbstrak
Kajian ini dijalankan untuk menganalisis aspek kemasyarakatan melalui pemikiran oleh A. Samad Said dalam novel popular beliau yang bertajuk Daerah Zeni dan Hujan Pagi. Hal ini kerana aspek kemasyarakatan yang dibincangkan dalam novel oleh A. Samad Said dapat menggambarkan kekuatan pemikiran pengarang melalui kreativiti beliau yang dapat memberi sumber maklumat terkini kepada khalayak atau pembaca. Oleh itu, kajian ini juga dijalankan bertujuan mengenal pasti dan menganalisis aspek kemasyarakatan melalui pemikiran A. Samad Said dalam novel Daerah Zeni (1985) dan Hujan Pagi (1992). Di samping itu, reka bentuk kajian ini bersifat kualitatif melalui kaedah kepustakaan dan analisis kandungan teks. Selain itu, teori sosiologi dijadikan sebagai deduktif untuk memantapkan analisis perbincangan. Sebagai kesimpulannya, hasil dapatan kajian ini membuktikan bahawa A. Samad Said bijak mengutarakan cetusan idea dan kreativiti dalam usaha membincangkan isu semasa yang dapat diterima secara terbuka oleh masyarakat di dalam novel popular beliau.
Abstract
This study was conducted to analyze the aspects of society through the thinking by A. Samad Said in his popular novel titled Daerah Zeni and Hujan Pagi. This is because the societal aspects discussed in the novel by A. Samad Said can illustrate the strength of the author\u27s thinking through his creativity which can provide the latest sources of information to the audience or readers. Therefore, this study was also conducted by aiming at identifying and analyzing the aspects of society through the thinking by A. Samad Said in the novels Daerah Zeni (1985) and Hujan Pagi (1992). This study is qualitative in nature by using the library methods and text content analysis. In addition, sociological theory is used deductively to strengthen the analysis of the discussion. This study has proven that A. Samad Said has wisely expressed the spark of ideas and creativity in an effort to discuss current issues that can be openly accepted by the community in his popular novel.
 
Control-theoretic methods for biological networks
No full textFeedback is both a pillar of control theory and a pervasive principle of nature. For this reason, control-theoretic methods are powerful to analyse the dynamic behaviour of biological systems and mathematically explain their properties, as well as to engineer biological systems so that they perform a specific task by design. This paper illustrates the relevance of control-theoretic methods for biological systems. The first part gives an overview of biological control and of the versatile ways in which cells use feedback. By employing control-theoretic methods, the complexity of interlaced feedback loops in the cell can be revealed and explained, and layered feedback loops can be designed in the cell to induce the desired behaviours, such as oscillations, multi-stability and activity regulation. The second part is mainly devoted to modelling uncertainty in biology and understanding the robustness of biological phenomena due to their inherent structure. Important control-theoretic tools used in systems biology are surveyed. The third part is focused on tools for model discrimination in systems biology. A deeper understanding of molecular pathways and feedback loops, as well as qualitative information on biological networks, can be achieved by studying the “dynamic response phenotypes” that appear in temporal responses. Several applications to the analysis of biological systems are showcased.Accepted Author ManuscriptTeam Tamas Keviczk
A 43mW single-channel 4GS/s 4-bit flash ADC IN 0.18um CMOS
No full textThe continued speed improvement of serial links and appearance of new communication technologies, such as ultra wideband (UWB), have introduced increasing demands on the speed and power specifications of high speed low to medium resolution analog to digital converters (ADCs). While multi channel ADCs can achieve high speeds, they often require extensive and costly post fabrication calibration.
A single channel 4 bit flash ADC, suitable for abovementioned or similar applications, implemented entirely using current mode logic (CML) blocks, is presented. CML implementation allows for high sampling rates, while typically providing low power consumption at high speeds. To improve the conversion rate, both the analog (comparator array) and the digital (encoder) parts of the ADC are fully pipelined. Furthermore, the logic functions in the encoder are reformulated to reduce wire crossings and delay and to equalize the wires lengths in the layout. To keep the design simple, inductors are avoided. As a result, a compact design with small wire parasitics is achieved. Moreover, some geometric layout techniques, including a common centroid layout for the resistor ladder, are introduced to reduce the effect of mismatches to eliminate the use of digital calibration.
The ADC is designed and fabricated in 0.18um CMOS and operates at 4GS/s. It achieves an effective number of bits (ENOB) of 3.71 (3.14, 2.75) for a 10MHz (0.501GHz, 1.491GHz) signal sampled at 4GS/s (3GS/s, 3GS/s). Differential/integral nonlinearity (DNL/INL) errors are between +/-0.35LSB and +/-0.26LSB, respectively. The ADC consumes 43mW from a 1.8V supply and occupies 0.06mm2 active area.
Due to the use of CML circuits, the ADC achieves the highest speed reported for a single channel 4 bit ADC in a 0.18um CMOS technology. It also reports the best power performance among the 4-bit ADCs with similar or higher speeds. The active area is also among the smallest reported.
In addition, in this thesis, the signal to noise ratio (SNR) of an ADC is formulated in terms of its INL performance. The related formulas in the literature are not accurate for low resolution ADCs, and yet they do not take the input waveform into account. Two standard waveforms, ramp and sinusoid, are considered here. The SNR formulas are derived and confirmed by simulation results.Applied Science, Faculty ofElectrical and Computer Engineering, Department ofGraduat
A 60 mV Input Voltage, Process Tolerant Start-Up System for Thermoelectric Energy Harvesting
No full textThis paper presents a 60 mV input voltage start-up system for thermoelectric energy harvesting. A new process tolerant inverter cell is proposed, which is functional at supply voltages as low as 60 mV. Using the proposed unit cell, a ring oscillator has been implemented. The ring oscillator is followed by 40 charge-pump stages, an ultra-low-power level detector, and a boost converter. The energy harvesting system can generate an output voltage of 1 V and delivers a maximum power of 4.5 μW from a 60 mV supply. This system has been implemented in a standard 0.18 μm CMOS technology, uses neither zerothreshold voltage (normally-on) negative-channel metal-oxide semiconductor nor microelectromechanical systems switches and occupies 3.3 mm2.Accepted author manuscriptBio-Electronic
Phase noise reduction in a CMOS LC cross coupled oscillator using a novel tail current noise second harmonic filtering technique
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Low phase noise LC VCO with sinusoidal tail current shaping using cascode current source
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