The influence of light wavelength and intensity to the survival rates, growth rates and production index of Sutchi Catfish larvae

Sutchi catfish Pangasianodon hypophthalmus (Sauvage, 1878) is one of the most important freshwater fish species cultured in Southeast Asia. Artificial seed production of sutchi catfish is very important in aquaculture industry. However, the larval survival rates were low when reared in the hatchery. Providing optimum rearing condition for sutchi catfish larvae in the hatchery can increase the seeds production. Light conditions was reported to influence the survival and growth of fish. Hence, this study was conducted to examine the optimum light conditions in term of light wavelength and light intensity for rearing of sutchi catfish larvae. The sutchi catfish larvae were reared under five different light wavelengths (white, blue, green, yellow and red lights) and four different light intensities (1.40 10-4 , 1.40 10-3 , 1.40 10-2 , and 1.40 10-1 µmol/m²/s). The results showed that, the survival rates (SR), growth rates (SGRTL and SGRBW) and Production Index (PI) were higher in red light than other wavelengths. For light intensity, only PImshown significant effect to the larvae. Light intensity of 1.40×10-3 µmoles/m²/s wasmsignificantly higher than 1.40×10-1 µmoles/m²/s intensity. Apart from that, there weremtendency for high SR, SGRTL and SGRBW under low light intensities (1.40 10-4m and 1.40 10-3 µmoles/m²/s) when compared to high light intensities (1.40 10-2, and 1.40 10-1 µmol/m²/s). Therefore, red light wavelength and low light intensities (1.40 10- 4 and 1.40 10-3 µmoles/m²/s) were recommended when rearing sutchi catfish larvae

Rimbun Barbershop / Khairul Anwar Rosli ...[et al.]

We use the concept of grab barber shop because we want to make different from other barbershop in Johor. We are offering online booking of barber service using our own mobile application and come right in front of their door to try new marketing way to attract people and ease them to get their hair. With this kind of services, we believe that our marketing way will go further and way more attractive to the customer. Our main activity is offering service of giving fresh and trendy haircut. We are also providing experience barber that will satisfy the customer desire. In addition, we are using barber truck to operate and are given to every barber cum driver of the truck that will arrive to the customer destination around Johor. With this new way of services, we make the customer easier to get fresh haircut

Coral bleaching monitoring using drone aerial photo in selected areas in Tioman Island, Pahang

In 2016, coral reefs in the world experienced the biggest coral bleaching event ever recorded. As a result of the event, very large areas were bleached. Tioman Island was reported to experience the episodes of bleaching but the recovery process was not known. This research focused on the current state of corals in the island and to investigate the reliability of using a drone as unmanned aerial vehicle (UAV) for coral bleaching monitoring. The approach of the study was to use the low altitude aerial drone imagery for coral bleaching surveys in combination with Remote Sensing and GIS tools. Sampling sites were fixed at the Renggis, Soyak, Salang, Batu Malang and Tulai at the western part of the island which are known as hot spot for tourists. Bathymetry of the areas was determined and low altitude drone flights were made twice (morning and evening flight) at every site. Following the drone flight paths, three underwater transect lines were established at every site for underwater video recording. Data were analysed from the drone images and separation was made between coral cover, substrate and water (ISODATA). Marking of possible bleaching was done (based on the B band) using vector coral and Sequential Maximum Angle Convex Cone (SMACC). Results from underwater video analysis using Coral Point Count with Excel Extension (CPCe) were then compared with drone data. Highest sea surface temperature (SST) recorded in 2017 was 31 °C (in May) and lowest temperature was 27°C (in January) which was entirely lower than 2016. There is no significant effect of SST towards bleaching as monitored by CVT and drone in 2017 for all sampling stations. Most of the bleaching from August to October occurred in patches (compared to the whole area such as during 2016 bleaching).The hypothesis that results from drone methods has no difference than CVT for monitoring the patterns of coral bleaching was accepted at 4 stations and rejected at 2 stations. Conclusively, drone was successfully showed the bleaching points in the study area, thus the method is potentially contribute to the bleaching monitoring activities (reduce manpower; reduce cost over large coverage; for the purpose of ad-hoc monitoring; baselines study). If compared to satellite images, drone images may lack in suitable spectral for coral identification, but yet drone images allow continuous non-scheduled time for image acquisitions with high resolutions

Physical, leaching, and toxicity characteristics of PG76 binder modified with Rediset

Asphalt binder, as one of pavement component is exposed to heat and rainfall. Polymer modified asphalt binder is a good alternative to withstand the weather in tropical countries. By utilizing warm mix asphalt additive, the high compacting and mixing temperature can be reduced. However, the impact to the environment and its characteristic towards high temperature need to be evaluated before putting it to use. In the study, the physical properties, thermal characteristics, and leaching and toxicity of PG76 incorporated with Rediset LQ were investigated. The Tank Leaching Test was carried out to mimic the worst scenario of flood event effect on the asphalt binder. The results of physical tests denote that the new material has relative consistency while the thermal analysis indicates that the materials are stable beyond their mixing and compaction temperature. The decomposition starts at temperature > 360°C and ends at temperature <500°C for all samples. The tank leaching test also found that the materials are safe to be used as pavement material because the heavy metal elements from the leachate are below the maximum allowable volume by the World Health Organization and the United States Environmental Protection Agency

Physical leaching and toxicity characteristics of PG76 binder modified with rediset

Asphalt binder, as one of the pavement components, is exposed to heat and rainfall. Polymer modified asphalt binder is a good alternative to withstand the weather in tropical countries. By utilizing warm mix asphalt additive, the high compacting and mixing temperature can be reduced. However, the impact to the environment and its characteristic towards high temperature need to be evaluated before putting it to use. In this study, the physical properties, thermal characteristics, and leaching and toxicity of PG76 incorporated with Rediset LQ were investigated. The Tank Leaching Test was carried out to mimic the worst scenario of flood event effect on the asphalt binder. The results of physical tests denote that the new material has relative consistency, while the thermal analysis indicates that the materials are stable beyond their mixing and compaction temperature. The decomposition starts at temperature > 360°C and ends at temperature <500°C for all samples. The tank leaching test also found that the materials are safe to be used as pavement materials, because the heavy metal elements from the leachate are below the maximum allowable volume by the World Health Organization and the United States Environmental Protection Agency

Kajian ciri-ciri pasir pengalas dan pengisi sambungan turapan blok konkrit saling mengunci

The use of interlocking concrete block pavement as a road surface has increased in the road construction recently. This study was conducted to envisage the problems occur particularly for the bedding and joint filling sand of the interlocking concrete block pavement. Moreover, the effect of the moisture on the bedding sand was also studied. Two type of additives namely as palm oil fly ash (POFA) and silica fume, which carry the pozzolanic behaviour, were mixed with joint filling sand in order to improve its quality. These materials are industrial waste compound which can be easily found in Malaysia. Two types of permeability experiments, the constant and falling head tests were conducted to evaluate the permeability of the joint filling sands with the percentage additives used of 2%, 4%, 6%, 8% and 10%. A physical model was developed to investigate the degree of compaction and water absorption via sand in joints. Water absorption test was also conducted onto the model with the addition of additives of 0%, 5% and 10% with the joint filling sand for 5 and 10 days. Study shown that the incorporation of additives reduced the permeability of joint filling sand with the optimum values obtained for both POFA and silica fume mixtures both were at 2% respectively

Clinical profile of retinal vein occlusion in Hospital Universiti Sains Malaysia a 7 years review

To review the clinical profile of retinal vein occlusion (RVO) in Hospital Universiti Sains Malaysia (USM) from 2011 until 2017. This was a retrospective single-centre case series. The medical records of the patients presented to Ophthalmology Clinic with RVO from 2011 to 2017 were reviewed. A total of 24 patients (26 eyes) with a diagnosis of RVO in Hospital USM were reviewed. There was 91.6 of our patients were aged more than 45 years old with predominantly affected male gender (58.3). Majority of the patients were Malays (87.5). Hypertension (70.8), hyperlipidemia (70.8) and diabetes mellitus (54.2) were the common systemic comorbidities in RVO patients. Majority of the patients (87.5) were non-smoker. Based on type of RVO, there were 38.5 central RVO, 26.9 branch RVO, 19.2 macular branch RVO, and 15.4 hemivein occlusion. RVO was bilateral in 2 patients (8.4). Based on fundus fluorescein angiography, 3 patients (11.5) showed ischaemic features. Reduce vision (91.6) was the main presenting symptoms of RVO while intraretinal haemorrhage (100) and macular oedema (96.2) were the most common ocular signs found in RVO. There were 16 eyes (61.5) have visual acuity equal or better than 6/60 at presentation. Patient who had visual acuity equal or better than 6/60 showed promising improvement in visual acuity post treatment. Elderly with multiple comorbidities complaining of worsening of vision should have high index suspicion of RVO. Presenting visual acuity is associated with final visual outcom

Enhancing Security and Privacy in Local Area Network (LAN) with TORVPN Using Raspberry Pi as Access Point: A Design and Implementation

Network security is designed to protect the integrity, confidentiality and accessibility of computer networks and data using both software and hardware technologies. Every person, including organization requires a degree of network security solutions in place to protect it from the ever-growing landscape of cyber threats in the wild today.  This paper aims to design and implement TorVPN as an access point using Raspberry Pi in enhancing security and privacy in Local Area Network (LAN).  This access point was implemented by using the combination of The Onion Router (Tor) and Virtual Private Network (VPN) services. Then, the graphical user interface application was developed to assist and facilitate the user to access the network securely without having the difficulties to configure and install any software. To determine the effectiveness of the proposed work, there were two experiments involved in this study. Firstly, the confidentiality test which to verify its privacy in keeping the information securely. Secondly, the performance test of the Internet connectivity in terms of ping, download and upload speed. The encourage results was expected as the confidentiality tested on the TorVPN access point network has shown the positive outcome by securing client’s Internet data packet. While, the Internet connectivity is not stable enough, when the client’s IP address changed in the network. Hence, the combination VPN and Tor service using Raspberry Pi as an access point inside the LAN is suitable and secure the information in the network, but do not suggest for user who wants a good Internet connectivity

Phylogenetic relationships of the vulnerable wild cattle, Malayan gaur (Bos gaurus hubbacki), and its hybrid, the selembu, based on maternal markers

The gaur (Bos gaurus) is one of the two extant wild cattle species that can be found in several Asian countries. This species is threatened by extinction due to declining wild populations. Selembu is the name of the Malayan gaur × domestic cattle hybrid. We planned this study to determine the position of the Malayan gaur and its hybrid, the selembu, in the phylogenetics of the genus Bos (Bos gaurus, Bos javanicus, Bos indicus, and Bos taurus). The itochondrial 12S rRNA gene and the control region (D-loop) were sequenced in 29 Bos samples. Sequences from one water buffalo (Bubalus) were used as an outgroup. Phylogenetic trees were reconstructed using neighbor-joining and maximum parsimony in PAUP 4.0b10 and Bayesian inference in MrBayes 3.1. All tree topologies indicated that the Malayan gaur belongs to its own monophyletic clade that is distinct from other species of the genus Bos. Selembu samples were grouped in zebu and/or taurine cattle clades. The results also indicated that there are significant embranchment differences in the tree topologies between wild (Malayan gaur and banteng/Bali cattle) and domestic (taurine cattle, zebu cattle, and selembu) cattle. The results showed the complete maternal inheritance situation among the studied samples of all cattle species

Species identification of Malayan Gaur, Kedah-Kelantan and Bali cattle using polymerase chain reaction-restricted fragment length polymorphism

Mitochondrial DNA (mtDNA) is a useful genetic marker that can be used for species identification. The cytochrome b (Cyt b) gene is a suitable mtDNA candidate gene for use in phylogenetic analyses due to its sequence variability, which makes it appropriate for comparisons at the subspecies, species, and genus levels. This study was conducted to develop a rapid molecular method for species identification of Malayan gaur (Bos gaurus hubbacki), Kedah-Kelantan (KK) (Bos indicus), and Bali (Bos javanicus) cattle in Malaysia. DNA was extracted from blood samples of 8 Malayan gaurs, 30 KK, and 28 Bali cattle. A set of both specific and universal primers for the Cyt b gene were used in PCR amplification. DNA sequences obtained were then analyzed using BioEdit and Restriction Mapper softwares. The PCR products obtained from Cyt b gene amplification were then subjected to restriction enzyme digestion. The amplification, using both specific and universal primers, produced a 154- and a 603-bp fragment, respectively, in all three species. Two restriction enzymes, NlaIV and SspI, were used to obtain specific restriction profiles that allowed direct identification of Malayan gaur, KK, and Bali cattle. Our findings indicate that all three species can be identified separately using a combination of universal primers and the restriction enzyme SspI