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Numerical boundary layer solution of ferrofluid over a horizontal flat plate with passive control boundary condition
Full text linkEnhancing biofuel pellet quality using torrefaction and co-pelletization of palm kernel shell and empty fruit bunch
No full textPalm kernel shell (PKS) and empty fruit bunch (EFB) are potential biomass resources for producing solid biofuel for energy applications. However, raw EFB and PKS are not uniform in size and pose rotting behavior. Torrefaction and co-pelletization are both effective methods to improve their combustion and mechanical characteristics. This study aims to investigate the effect of torrefaction temperature and the blending ratio of PKS and EFB on the mechanical and combustion characteristics of co-pellets. Initially, PKS and EFB underwent torrefaction process for 30 min at three different temperatures (210 °C, 240 °C, and 270 °C). Then, both torrefied PKS and EFB were blended at five different ratios (0:100, 25:75, 50:50, 75:25, 100:0) with carboxymethyl cellulose as a binder (10% by weight). The results showed that pellet produced at higher torrefaction temperature at 270 °C resulted in an increment of the higher heating value (HHV) but weaker mechanical strength. Pellet with a blending ratio of PKS to EFB (75:25) torrefied at 240 °C showed the comparatively best pellet quality in terms of HHV (17.94 MJ/kg), high tensile strength (3.5 MPa), low ash content (3.97 wt%), and the lowest density changes (0.66%), which satisfy the standard requirements for commercial pellets, indicating that a high-quality biofuel pellet can be produced using torrefaction and co-pelletization
Enhancement on anaerobic digestion of food waste using spend coffee ground derived biochar for biogas production
Full text linkIn recent, one of the available energy sources is biogas where it is suitable for necessities of the future with the appropriate application of digestion technology. However, the technology used which is anaerobic digestion (AD) faces some challenges especially for food waste including low biogas productivity due to unstable operation efficiency. In order to overcome this shortcoming, spent coffee ground (SCG) derived biochar is introduced as an additive in AD process to enhance the production. To promote the efficiency of the AD, the optimum condition of biochar dosage, the amount of feedstock and pH value were studied. The experimental findings revealed that 13.528ml/g of biogas yield was achieved under optimum condition of 7g of biochar, 500g of feedstock at pH 7 for 14 days. The characterization analysis of biochar showed that, the carbon content and surface area as well as several functional groups of SCG biochar has led to the enhancement of the biogas production during AD process of food waste. The outcomes shows that the addition of SCG biochar can solve the instability issues of AD process yet increase the production of biogas
Pengurusan Orang Kurang Upaya OKU menggunakan pendekatan Haddon Matrix
Full text linkInsiden melibatkan Orang Kurang Upaya (OKU) yang tular di media sosial dilihat sangat membimbangkan. Antaranya insiden seorang lelaki pemegang kad OKU kategori mental yang dipukul beramai-ramai akibat salah faham. Rentetan daripada insiden tersebut, semua pihak perlu bekerjasama bagi meningkatkan kesedaran dalam kalangan masyarakat Malaysia tentang pengurusan OKU
UMPSA dan PDRM perkukuh kolaborasi strategik
Full text linkKUANTAN, 2 Januari 2025 - Ibu Pejabat Polis Kontinjen (IPK) Pahang menjadi saksi bagi majlis bersejarah yang mengukuhkan kerjasama strategik antara Polis Diraja Malaysia (PDRM) dan Universiti Malaysia Pahang Al-Sultan Abdullah (UMPSA)
10 Universiti terbaik Malaysia
Full text linkMENYARUNG jubah konvokesyen dan naik ke pentas menerima skrol sijil atau ijazah ketika majlis konvokesyen merupakan detik-detik indah bagi kesemua pelajar yang melanjutkan pengajian di peringkat tinggi. Malah, ada yang tidak melepaskan peluang untuk merakam momen bersejarah mengenakan jubah konvokesyen itu bersama keluarga tersayang untuk dijadikan satu kenangan
Electrospun nanofibers of collagen and chitosan for tissue engineering and drug delivery applications: A review
Full text linkTissue engineering plays a vital role in the medical field that addresses the repair, regeneration, and replacement of damaged tissues or organs. The development of drug-eluting electrospun nanofiber composed of biological macromolecules plays a key role in providing localized drug delivery and structural support. This review examines the recent development and impact of electrospun nanofibers in the field of tissue engineering and explores their potential applications. This review also investigates into the fabrication techniques of nanofibers, highlighting the use of biopolymers like collagen and chitosan, chiefly, focuses on understanding the mechanisms of drug-releasing features of these nanofibers. Studies concerning the medical applications of these nanofibers, such as wound healing, skin regeneration, bone tissue engineering, and neural repair, were also reviewed. Beyond the application in tissue regeneration, this review also explores the potential efficacy of nanofibres in cancer therapy, antibacterial activity, enzyme immobilization, and biosensing applications. This study provides an up-to-date critical insight into the applications of electrospun nanofiber application and key scalable production processes, underscoring the potential economic impacts of advanced wound care technologies. While outlining current challenges, this paper also offers future perspectives on the design, application, and potential expansion of drug-eluting electrospun fibers in medical sciences, ultimately showcasing their pivotal role in advancing therapeutic outcomes
Impact of natural lemongrass and agarwood essential oil diffusion on indoor airborne pollutants: A case study of office environments
No full textThis research explores the use of natural-based essential oils to enhance the quality of indoor air (IAQ) in an office environment using an experimental approach. Lemongrass and agarwood essential oils were studied for their potential to contribute to a healthier and sustainable indoor environment due to their antibacterial properties. The essential oil droplets were released using an Ultrasonic Diffuser, and air quality measurements were taken before and after the diffusion of essential oils. The concentration of airborne bioaerosols, VOCs, PM, and other physical parameters were monitored throughout the sampling period. Lemongrass essential oil significantly reduced the total bacterial and fungal count by 74.19% and 76.34% respectively, while agarwood only significantly reduced the total fungal count by 55.20%. This study found that physical parameters such as air velocity and relative humidity have a substantial impact on the efficiency of essential oil diffusion. With a correlation of more than 47%, lemongrass diffusion showed substantial relationships between air velocity and VOC, PM10, and PM2.5. Diffusion of agarwood showed strong correlations of more than 57% between relative humidity and VOC, TSP, PM10, and PM2.5. Temperature, as controlled by air conditioning, did not affect diffusion. The study adds to our understanding of the antibacterial and antifungal activities of lemongrass and agarwood essential oils. Diffusing essential oils, particularly lemongrass, improved IAQ as the total microbial count was able to be reduced without impacting other parameters, demonstrating a practical and efficient improvement. The beneficial effect on IAQ highlights the potential of essential oil diffusion for healthier indoor environments, hence helping the promotion of good IAQ following safety and health regulations
Characterization of accumulated unknown and soil dust on the PV system: An experimental study on the impact and performance analysis
No full textDust accumulation on PV module surfaces directly impacts incident solar radiation, resulting in a significant decrease in the electrical performance of large-scale solar power plants. In this investigation, the characterization and impact of unknown and soil dust particles on PV systems at the Pasir Mas Solar Farm in Kelantan, Malaysia, were examined. The principal goal was to comprehend the impact of accumulated dust on the performance of PV systems and to characterize the dust samples. Using state-of-the-art lab facilities, the investigation disclosed the physical, optical, morphological, and chemical characteristics of both known and unknown dust. The impact of deposited dust was also identified using thermal imaging techniques and I–V data measurements. The results of the particle size analysis indicated a Z-average size of 4730 nm and a Polydispersity Index of 1.0. The SEM and EDS analyses revealed heterogeneous particle sizes with substantial quantities of SiO2 and Al2O3. The UV–VIS–NIR spectroscopy found a high absorbance characteristic of the dust which may result in thermal degradation. According to I–V data measurements, only 0.88% and 41.60% of the 226 strings met the expected Voc and Isc, respectively, and thermal imaging detected that approximately 19.91% of the PV strings were affected by hotspots. However, the performance ratio of the plant ranged from 81% to 89%, with an average of 85.82%, and efficiency varied between 12% and 13%. The study concludes that PV performance is substantially influenced by dust, underscoring the necessity of efficient cleaning methods and proposing future research on chemical cleaning processes
Penyelidik UMPSA Profesor Ir. Ts. Dr. Kamarul Hawari hasilkan iSenseFishery sistem pengurusan akuakultur berasaskan AI
Full text linkPEKAN, 22 Januari 2025 – Umum mengetahui bahawa industri akuakultur adalah antara penyumbang terbesar bagi industri makanan laut