54 research outputs found
Audio storage and playback in low-cost embedded device
No full textHuman perception to sound is weaker than most animal in the world. Human can only hear sound within specific range in term of frequency, 20 Hz to 20 kHz. However, ‘sound’ brings giant impact on human physically and mentally, in both good and bad ways, and also plays an important role in conveying information. In this project, the author implemented an audio playback system on low-cost device with System Workbench for STM32 (SW4STM32). The audio playback system comprises a STM32F411e-Dicsovery board and breakout board for microSD card. The system retrieves audio data from audio source-microSD card, and playback thru built in DAC on the Discovery board. Upon the system implementation, to understand the limitation and improve system performance, evaluation and several tests were done on three aspects: buffer size, audio input rate and audio output rate, to determine their influence on audio playback quality. The playback under different were played and recorded, then analysis using Goldwave. At the end of the tests, the system is able to play audio with sampling frequency up to 96000 Hz (DVD audio quality). Although the performance is improved, this audio playback system only supports audio files in wave format. For storage and cost efficiency, it is suggested to be improved for supporting more kinds of format. In the other hands, tests are suggested to run using high accuracy equipment for higher accuracy.Bachelor of Engineering (Computer Engineering
Critical Factors Affecting Productivity for Table Form System in the Malaysian Construction Industry
No full textAssessment of plant height and trunk diameter of oil palm as a sole function of soil textural grains (sand, clay, and silt)
No full textPlant height is a key indicator of healthy growth. Given the role of soil texture in productivity, the effects of sand, silt, and clay on the height and diameter of oil palm (OP) were investigated. In the four OP plantations, measurements of total and trunk heights and trunk diameters were taken from two OP clusters: tall and short. A Pro II Laser Rangefinder (ML921) was used to measure heights. Soil samples were subjected to particle distribution analysis using the pipette method. The data were processed using RStudio software. The t-test confirmed a significant difference in the heights between the clusters in all plantations, implying the accuracy of clustering. For total height, the tall cluster was greater than the short by 24.75%, 23.89%, 27.17%, and 27.51% in OP1, OP2, OP3, and OP4, respectively. Regression analysis established that soil texture accounted for 65.3%, 46.8%, 74.4%, and 69.6% of the total OP height in the fields, respectively. Sand showed a strong to moderate positive correlation with total and trunk heights, and a moderate negative correlation with trunk diameter. The clay correlated inconsistently with trunk diameter, while silt in the 0–30 cm layer showed a strong to moderate negative correlation with height. In conclusion, soil texture profoundly influences oil palm height, with sand grains exerting the greatest positive effect. Typical clay soil should be avoided during oil palm site selection, and the fields should be well-leveled to avoid erosion, which results in continuous clay deposition on the bottom slope
ChemInform Abstract: Enantioselective Organocatalytic Fluorination Using Organofluoro Nucleophiles
No full textClimate variability and water stress effects on oil palm (Elaies guineensis Jacq.) productivity in Malaysia
No full textOil palm is a key pillar of Malaysia’s socio-economic development, contributing to the nation’s economic stability, and is also a major driver of the global oil industry. However, climate variability has progressively reduced the productivity of oil palm (OP) by subjecting it to water stress through inadequate and irregular rainfall, prolonged dry spells, and elevated temperatures. This article reviews past literature and provides useful insights into the effects of climate elements and the physiological and agronomic effects of water stress on OP. Water stress impairs the physiological and metabolic functions of OP, particularly stomatal conductance, leaf water potential, proline synthesis, sex differentiation, and water use efficiency. These combined effects diminish the biomass and yield of OP. This review also highlights the temporal variability of climate and identifies the role of various soil properties related to water stress. It presents climate projections threatening OP sustainability and presents possible solutions. Additionally, the specific fraction of plantavailable water necessary for triggering water stress remains under-researched. The relationship between various physiological and genetic mechanisms that control stomatal response during water stress is unclear. The efficiencies of various irrigation approaches and water conservation measures must also be re-evaluated based on climate predictions
Assessment of plant height and trunk diameter of oil palm as a sole function of soil textural grains (sand, silt and clay)
No full textPlant height is a key indicator of healthy growth. Given the role of soil texture in productivity, the effects of sand, silt, and clay on the height and diameter of oil palm (OP) were investigated. In the four OP plantations, measurements of total and trunk heights and trunk diameters were taken fromtwo OP clusters: tall and short. A Pro II Laser Rangefinder (ML921) was used to measure heights. Soil samples were subjected to particle distribution analysis using the pipette method. The data were processed using RStudio software. The t-test confirmed a significant difference in the heights between the clusters in all plantations, implying the accuracy of clustering. For total height, the tall cluster was greater than the short by 24.75%, 23.89%, 27.17%, and 27.51% in OP1, OP2, OP3, and OP4, respectively. Regression analysis established that soil texture accounted for 65.3%, 46.8%, 74.4%, and 69.6% of the total OP height in the fields, respectively. Sand showed a strong to moderate positive correlation with total and trunk heights, and a moderate negative correlation with trunk diameter. The clay correlated inconsistently with trunk diameter, while silt in the 0–30 cm layer showed a strong to moderate negative correlation with height. In conclusion, soil texture profoundly influences oil palm height, with sand grains exerting the greatest positive effect. Typical clay soil should be avoided during oil palm site selection, and the fields should be well-leveled to avoid erosion, which results in continuous clay deposition on the bottom slope
Resetting the epigenome for heart regeneration
No full textIn contrast to adults, recent evidence suggests that neonatal mice are able to regenerate following cardiac injury. This regenerative capacity is reliant on robust induction of cardiomyocyte proliferation, which is required for faithful regeneration of the heart following injury. However, cardiac regenerative potential is lost as cardiomyocytes mature and permanently withdraw from the cell cycle shortly after birth. Recently, a handful of factors responsible for the regenerative disparity between the adult and neonatal heart have been identified, but the proliferative response of adult cardiomyocytes following modulation of these factors rarely reaches neonatal levels. The inefficient re-induction of proliferation in adult cardiomyocytes may be due to the epigenetic landscape, which drastically changes during cardiac development and maturation. In this review, we provide an overview of the role of epigenetic modifiers in developmental processes related to cardiac regeneration. We propose an epigenetic framework for heart regeneration whereby adult cardiomyocyte identity requires resetting to a neonatal-like state to facilitate cell cycle re-entry and regeneration following cardiac injury
Evaluation of Service Quality of Private Higher Education Using Service Improvement Matrix
No full textAbstractIn the quest for academic excellence, the government of Malaysia is very concerned about the quality of higher education institutions. Higher education is increasingly recognized as a service industry, and this puts a greater emphasis on meeting the expectations and needs of its participating customers who are the students. Due to intense competition, many universities and colleges face declining student enrolment and there is a need to address the problem of the quality of programmes and services offered. This study evaluates the service quality of a Malaysian private higher education institution with the objective of determining what constitutes the service variables in the education industry. Using gap analysis, it examines whether there are any service gaps in the individual service quality attributes. Five specified dimensions, namely tangibles, empathy, assurance, reliability and responsiveness at the educational institution, were examined. Data was collected from respondents using a well-structured questionnaire designed and adapted for the provision of educational services in line with SERVQUAL dimension scale. To achieve this, students as respondents were surveyed on their expected and perceived service quality rendered to them and their opinions garnered on whether service quality has had any effect on their satisfaction. A total of 150 questionnaires were distributed to students who had enrolled at the educational institution. Using service gap analysis, the findings indicated negative gaps for empathy and assurance dimensions. With the aid of service improvement matrix (SIM), satisfaction based on service perception and importance based on service expectation were plotted on a two-dimensional grid. This allowed for service improvement decisions to be made such as service improvements that are both necessary (low satisfaction ratings) and important for students (high importance ratings). Service strategies are recommended to managers to improve service quality and promote student satisfaction
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