Preparation and characterization of mixed matrix membrane based on Polysulfone (PSF) and Lanthanum Orthoferrite (LaFeO3) for gas separation

The aim of this study is to investigate the effects of polysulfone (PSF) and lanthanum orthoferrite (LaFeO3) incorporated mixed matrix membrane (MMM) on gas permeation and selectivity properties. PSF/LaFeO3 MMMs were prepared with various weights loading of LaFeO3. The membranes obtained were characterized using scanning electron microscope (SEM), thermal gravimetric analysis (TGA) and Fourier-transform infra-red (FT-IR). The gas transport properties of MMM were measured using single gas permeation set up (CO2, CH4, O2 and N2) at ambient temperature, and feed pressure of 2, 4 and 6 bar. The permeation test showed that the mixed matrix membrane exhibited high permeability. With increasing LaFeO3 weight loading to 1.0%, the highest permeability values were 47.74 GPU for CO2, 29.85 GPU for CH4, 57.56 GPU for O2, and 40.66 GPU for N2. The results also showed that by incorporating 1.0wt% of LaFeO3 into PSF matrix, the highest CO2/CH4 and O2/N2 selectivity of 1.60 and 1.42 respectively were obtained. Overall, all the resultants MMM showed higher permeability and selectivity compared to pure PSF membrane

Effects of micronutrient and spacing on growth and chlorophyll content of rice

An experiment was carried out at the research field of the Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU).There were four nutrient treatments i.e., E1= NPKS recommended dose; E2= NPKS + Zn 5 Kg ha-1; E3= NPKS + Zn (5 Kg ha-1) + B (3 Kg ha-1) E4= NPKS + Zn (5 Kg ha-1) + B (3 Kg ha-1) + Mo (2 Kg ha-1) and three spacing S1= 20 x 10 cm2; S2 = 20 x 15 cm2 and S3 = 20 x 20 cm2.Micronutrient and spacing combined had a distinct positive response in crop growth attributes and chlorophyll content of rice. The tallest plant height (147.0 cm) and root length (13.50 cm) highest panicle length (22.56 cm) was attained in the treatment E2S3 but the maximum tillers per hill (14.95) and effective panicle per hill (14.17) were recorded in treatment E2S2. Physiological parameter i.e., LAI, CGR, RGR, NAR, total chlorophyll content of rice also responded significantly and the appropriate combination was E4S2treatment. Based on vegetative growth, physiological parameters and yield attributes the treatment combination E4S2 showed the best performance

The orientation setting of buildings in the traditional Malay settlement: a case study of Kg Seri Tanjung, Sungai Udang, Melaka

The orientation of buildings is one of the factors that define the characteristics and pattern of a settlement. The purpose of this paper is to analyse the orientation setting of the buildings in one of the gazetted traditional Malay settlements in Melaka, namely Kg Seri Tanjung, which has been listed as Heritage Village in Melaka State Structure Plan 2035. The objective of this research is to identify the orientation setting of the built-up areas and analyse the factors of the orientation of the built up. This research has used the drone technology to identify the orientation setting of each built up in the settlements, which is also supported by the ground survey to confirm the social interactions among the settlers. The findings indicate that the orientation of a building is influenced by the geographical factors and distribution of houses that depends on the family ties among the dwellers. It is identified that the geographical factors and relationship among the neighbours are highly related to the orientation of the buildings, which is also contributed by the factors of orientation of the buildings towards the natural environment, road, qiblat and its adjacent buildings. This analysis highlights and acknowledges some potential values in the traditional Malay settlement settings that can be used as a reference for the preservation of the characters of the future traditional settlement. The findings of this study are also a part of the urban design principles of the traditional Malay settlement that is important to preserve the identity of Malay in future development

Laser-assisted high speed machining of aluminium alloy: The effect of ultrasonic induced droplet vegetable-based cutting fluid on surface roughness and tool wear

Laser-assisted high speed milling is a subtractive machining method that employs a laser beam to thermally soften material's surface in order to enhance machinability at high material removal rate with improved surface finish and tool life. Ultrasonic-assisted milling is an advanced manufacturing technology where ultrasonic source is connected with cutting tool, that has demonstrated effectiveness in terms of acquiring good surface topography and high surface finish. Despite this, its application is limited at low speed and is not widely applied for high volume production. Here, an ultrasonic-induced droplet delivery method is employed as an efficient method for laser-assisted high speed milling operation. In this study the effect of ultrasonic-induced droplet cutting fluid on surface roughness and flank wear of 6082 aluminium alloy is experimentally investigated using response surface methodology (RSM) and the results are compared with the conventional droplet cutting fluid. The ultrasonic creates acoustic streaming, acoustic cavitation as well as cavitation bubbles in the cutting fluid. This acoustic energy is able to increase the local temperature of cutting fluid with which the laser power combinedly softens the machined surface, thereby reducing the tool abrasion and surface roughness. The results show a favourable reduction in surface roughness and flank wear by 11.04 and 1.37%, respectively, in comparison to conventional droplet cutting fluid. Clearly, the laser-assisted high speed milling with ultrasonic-induced droplet cutting fluid will be applicable in high production rate manufacturing where it will yield less production time, low operating cost and, at the same time, give better surface finish and longer tool life. © 2021 Old City Publishing. All rights reserved

Extreme Learning Machine in Laser-Assisted Machining Using Waste Palm Cooking Oil

Use of lubricating/cutting fluids is crucial in machining processes to reduce friction, alleviate heat accumulation and prolong tool life. To minimize environmental and health impacts, a number of studies using vegetable oil-based cutting fluid have been investigated and reported demonstrating similar performance obtained using commercial cutting fluids. However, massive use of vegetable oil for such purposes would undeniably trigger issues of food security. In order to mitigate food waste, the primary objective of the chapter is to demonstrate the application of waste palm cooking oil as a potential lubricating fluid in laser-assisted machining of metal. By considering kinematic and dynamic viscosities of the waste cooking oil, its effects on surface roughness and tool wear are studied by predicting using extreme learning machine (ELM). The prediction results show that the average errors are only 0.51% and 1.19% for surface roughness and flank wear, respectively, suggesting good agreement between observation and prediction

Tensile property of melt mixing co-polypropylene with waste polymer at different composition ratios

In order to implement economical way of managing unwanted substances, waste polymer (WP) can be recycled instead of throwing it away. It can be reused via "sink-float" technique and mixed with another binder like co-polypropylene (co-PP) to enhance the mechani-cal properties of the material. This is because co-PP is a bit softer but has better impact strength, much tougher and more durable than polypropylene (PP). Two materials underwent injection moulding with 170°C temperature to produce dog bone samples for tensile test. The test started with 10% up until 80% of WP content mixed with co-PP. Tensile test speed used for this experiment was 5mm/s. Stress vs. strain graph was obtained from the test and the modulus of elasticity was obtained by using the stress over strain formula. The stress versus strain result for the composite with WP is lower than that of co-PP, proving that WP is more brittle compared to the more elastic co-PP. Morphological analysis of surface structure based on Optical Microscope (OM) indicates that co-PP has smooth surface while WP has a rough surface

Analysis on the socio-cultural values of the traditional Malay houses compound

The Malay traditional environment is the interaction between human, natural environment, and culture, which is then translated into the spatial design of houses and their surroundings. However, rapid urbanisation has transformed many traditional villages by incorporating urban elements into the villages. This study focuses on understanding the existence of the socio-cultural values of a traditional Malay house compound in Kampung Paya Rumput Jaya, Melaka. The objective of this study is to identify the Malay socio-cultural values and the spatial arrangement of the traditional Malay house compound. Data were collected by means of a questionnaire survey, semi-structured interviews, a mapping analysis (site inventory), and a thematic/content analysis (interviews). The findings indicate that the community in the villages are still upholding the Malay traditional socio-cultural values. Future design of a house compound should incorporate the characterisation of a traditional Malay houses compound for maintaining at least part of the Malay traditional socio-cultural values

Primary giant cell tumour of the breast with recurrence : a rare case report

Giant cell tumour (GCT) arising from the soft tissues of the breast is a rare disease with only eight cases previously reported in the literature. We present a case of histologically proven GCT of the breast, which demonstrated recurrence a few months after resection.http://www.sajr.org.za/index.php/sajrdm2022Anatomical PathologyRadiolog

Fresh Water Fish Intake And Dishes Preferences Among Local Community: A Preliminary Study Of Tourists attraction in traditional dishes for homestay Kampung Batu Ring, Beng, Lenggong, Perak

Local foods is a vital element that helping and creating a sense of ‘place’ and heighten destination appeal. Local foods produce adds authenticity to the tourists for sharing experience and attract them to come to those place. Traditional food or local food is a parts of variety culture in Malaysia. It shows that the local community has its own uniqueness. Therefore it should be opened and sharing together either between the local community from other states or from the tourist views for attractions the places. An objective of the study were ; (1) To identify the type of freshwater fish intake, (2) To determine dishes preference using freshwater fish among villagers at Homestayed Kampung Batu Ring, Beng, Lenggong. The study was conducted through questionnaires to 25 respondents in the village. The result showed that common freshwater fish consumed are Tengalan (Puntius wool), Loma (Thynnichthys thynnoides), Terbol (Osteochilus hasselti) and others fish such as Catfish, Tilapia, Kaloi, Baung and Patin. The most popular fresh water fish is responds for Tengalan fish. This fish when cooked with coconut gravy (masak lemak) is the most preference dishes indicated by respondents. Therefore, fresh water fish and traditional dishes that already exist there and has been a natural culture among villagers shall point out for promoting Lenggong city for tourism such as homestay program. These finding is important in branding Lenggong as a World Heritage Site