bluuebunny/crossref_metadata_2025_split huggingface dataset:
Investigation on the water absorbency, chemical and thermal properties of superabsorbent poly (acrylic acid-co-acrylamide)/spent coffee ground composite
Authors: Lim H L , Mazlan S N A , Ghazali S , Abd Rahim S , Jamari S S 
Published: March 2020

Abstract
Superabsorbent polymer (SAP) is defined as a material that can absorb huge amount of water while remain its original shape without loss the water or aqueous solution that had been absorb. The incorporation of filler in SAP could increase the water absorbency of the polymer. Thus, this work aim to investigate the properties of spent coffee ground (SCG) bio- filler into the SAP network using inverse suspension polymerization method. The structural, thermal and also morphological characterizations of the synthesized SAPs were performed by FTIR, TGA, and FESEM techniques. Based on the results obtained, the optimum of water absorbency of SAP was shown at SAP_0.05SCG filler respectively. For the effect of filler loading, the observed result was supported by FESEM microstructures of SAP where the surface morphology of all sample with varied filler composition shown coarse surface. It is observed using FTIR spectra that the O-H band is broader and sharper at SAP_0.05SCG compared to the control and the SCG filler. For the TGA, the SAP_0.05SCG is easier to thermally degrade compared to the control. Thus, this research has proved that the SCG is able to enhance the water absorbency of superabsorbent polymer which could give better contributions in various applications.
Improvement of ethylene epoxidation by palladium–silver catalysts in a low-temperature dielectric barrier discharge system
Authors: Suttikul T , Photsathian T , Chavadej S 
Published: March 2020

Abstract
This work was to improve the ethylene (C2H4) epoxidation reaction by adding different catalysts in a low-temperature dielectric barrier discharge (DBD) system. The studied catalysts for the ethylene epoxidation were 0.1 wt.% silver (Ag), 0.005 wt.% palladium (Pd), 0.01 wt.% Pd, and 0.01 wt.% Pd-0.1 wt.% Ag catalysts, which were coated on the second half surface of the frosted glass plates, used as a dielectric barrier material. A separate O2/C2H4 feed with a C2H4 feed position fraction of 0.5 was employed to suppress all undesired reactions and to enhance the EO selectivity. The C2H4 separate feed from O2 reduced opportunity of the collision between C2H4 molecules with high energetic electrons, causing the reduction in carbon monoxide (CO) formation, carbon dioxide (CO2) formation, dehydrogenation, C2H4 cracking, and ethylene oxide (EO) oxidation. Interestingly, the presence of any active catalyst (0.1 wt.% Ag, 0.01 wt.% Pd or 0.01 wt.%Pd-0.1 wt.% Ag catalysts) provided the significant increases in the EO selectivity due to the addition of surface reactions on the active sites of the applied catalysts. The bimetallic 0.01 wt.% Pd-0.1 wt.% Ag catalyst in the DBD system exhibited the best synergistic process performance in terms of the highest EO selectivity and yield. The addition of the Pd on the 0.1 wt.% Ag catalyst promoted the reaction of oxametallacycle (OMC) intermediate to form the desired EO and maximized the difference in the activation energies between the desired EO formation and undesired acetaldehyde formation of OMC, resulting in the improved EO selectivity.
Isolation of Bacillus strains inhibition disease resistance of Acute Hepatopancreatic Necrosis Disease on the Shrimp in Can Gio, Vietnam
Authors: Phung L T , Phuong T T M , Phung N K , Nicolas M 
Published: March 2020

Abstract
Recently, the outbreak and severe damage to the shrimp farming industry is Early Mortality Syndrome (EMS) or Acute Hepatopancreatic Necrosis Disease (AHPND). The selection of Bacillus strains inhibition disease resistance of the acute hepatopancreatic necrosis disease on the shrimp is a research filed that is much attention due to Bacillus subtilis is a group of beneficial bacteria that presents in the majority of biological products for aquaculture, especially for shrimp. Competitiveness of Bacillus subtilis towards the harmful bacteria firstly is the number of bacterial cells. Beside, Bacillus has capacity to create a large amount of extracellular enzymes aid digestion, antibiotics or the inhibitor has the characteristic for resistance to the strains of Vibrio Parahaemolyticus. In this work, the inhibition ability of the Bacillus strains for the AHPND on the brackish water shrimp is studied. In which, the Bacreria is isolated and filtered from shrimp farm in Can Gio province that contain the characteristic of antagonizing Vibrio parahaemolyticus, which cause AHPND on shrimp in laboratory conditions. The results show that Bacillus subtilis produced 2,5 – Diketopiperazines capable to inbihite the growth of pandemic strain of Vibrio parahaemolyticus in Landy media for hightest activity was 200 AU/mL after 24 h of culture. This research is create the possibility of using probiotics to control the pantogenic clones Vibrio parahaemolyticus that cause AHPND for brackish water shrimp farming in Can Gio province as well as other areas in Vietnam.
Evaluation of polyphenol, anthocyanin content and antioxidant capacity of some Vietnamese fruits
Authors: Pham T N , Nhan L T H , Cang M H , Lam T D , Thu D N A , Nguyen T Q , Danh V T 
Published: March 2020

Abstract
Polyphenol-rich fruits are plant materials of interest due to the high anthocyanin content and number of antioxidant compounds. Besides, anthocyanins also possess other various beneficial properties, including antioxidant activity and mitigation of risk of circulatory diseases. In this study, different polyphenol-rich fruit species including Ficus racemosa, Fragaria ananassa, Passiflora edulis, Carissa carandas Linn, and Rhodomyrtus tomentosa were harvested and compared for total anthocyanin content, total phenolic, and antioxidant activity. Extraction conditions included solvent of 50% ethanol, material/solvent ratio of 1:5, temperature of 60°C temperature and extraction time of 30 minutes. In terms of total phenolic content, Fig fruit achieved 136.08 mg GAE/g. Among examined fruits, strawberries contained the largest amounts of anthocyanin (355.27 mg cy-3glu L−1). Passion fruit showed the highest antioxidant activity (409.89ug/mL). The results of this study are expected to contribute to further development in utilization of the said fruits and open new pathways in enhancing value of agricultural products in Vietnam.
A design on the collimator for boron neutron capture therapy (BNCT) research facility at the thermal column of TRIGA MARK II
Authors: Shalbi S , Sazali N , Wan Salleh W N 
Published: March 2020

Abstract
The development of the Boron Neutron Capture Therapy (BNCT) facility in Malaysia can be performed at the thermal column of the Malaysia research reactor. TRIGA MARK II is one of the facilities that can provide neutron source for BNCT facility. The specification of neutron flux and the gamma dose rate must consider for the development of the BNCT facility as a safety precaution for this research. Based on previous research, the thermal column identified as a suitable place for BNCT facility. To design the neutron collimator for BNCT purpose, the characterization of material towards thermal neutron flux explored using TLD and Microspec-6 and the collimator design was simulate using Monte Carlo N-Particle (MCNP) software based on the characterize materials in order to produce high thermal neutron flux. The combination of lead, HDPE, 30% borated polyethylene and aluminium as collimator design D1 simulate the highest thermal neutron 1.5770 x 109 neutron.cm−2s−1 and suitable for BNCT research purpose at the thermal column.
Optimization of Rebaudioside A extraction from stevia leaves using response surface methodology
Authors: Muthusamy K , Abdul Munaim M S 
Published: March 2020

Abstract
Rebaudioside A or Reb A is an extractable component from stevia leaves or scientifically known as Stevia rebaudiana. Reb A is famous for its exceptional sweetness and widely used as a non-caloric sweetener. Its potential widespread use requires an easy and effective extraction method. In this study, extraction of Reb A from stevia leaves with parameters such as temperature, material ratio and extraction time were investigated. Time of extraction were 1, 1.5, 2, 2.5 and 3 hours. Temperature was varied at 400C, 450C, 500C, 55

0

C and 600C. Material ratio was 1:5, 1:10, 1:15, 1:20 and 1:25. Then, using Design Expert software, the ranges of the parameters were entered in the Central Composite Design (CCD) to create 20 different combinations of parameters for extraction. After executing the experiments, the yield of Reb A obtained was keyed in Response Surface Methodology (RSM) for optimization. Finally, the optimum condition was tested and validated by calculating the percentage error. Since the percentage error was less than 10%, the optimum condition, which is, 350C, 1:6 material ratio and 5 hours of extraction was accepted.
Modified recycled paper-based adsorbent for nickel removal
Authors: Awang N A , Salleh W N W , Hasbullah H , Ahmad S Z N , Ismail N H , Rosman N , Yusof N 
Published: March 2020

Abstract
The outcome from the industrialization and urbanization promotes the environmental problems especially related to the release of heavy metals. The adsorption method is a promising technique among all the available approaches in heavy metal removal treatment due to its high efficiency, low cost, and simplicity in design and operation. A good selection of solid sorbent becomes one of the greatest problems in adsorption technique. In this present work, we developed recycled paper-based cellulose adsorbent grafted with acrylonitrile in the presence of ceric ammonium nitrate as the initiator. The modified adsorbent was used to adsorb Ni(II) from the aqueous solution. The adsorption process was conducted at different operational conditions by varying the pH of the solution, initial concentration of the Ni(II), and the contact time for the adsorption to reach equilibrium and obtained the highest adsorption capacity. The result demonstrated that the grafted recycled paper-based cellulose adsorbent had improved the adsorption capacity of Ni(II) ions. The most propitious condition obtained was at pH 5 after 1 h, with an initial concentration of 160 mg/L of Ni(II) ions; the removal reached 317.5 mg/g (79.3% removal). The surface studies of the adsorbent before and after Ni(II) ions adsorption was analyzed by using the scanning electron microscopy (SEM). The adsorption equilibrium data of Ni(II) ions was best described by the Freundlich and Pseudo-second-order model. Conclusively, the prepared grafted recycled paper-based cellulose adsorbent proved to be competitive and a promising adsorbent for the removal of Ni(II) ion from aqueous solution, as well as in wastewater treatment application.
Influence of monsoon seasons on accidental chlorine leak and dispersion around Gebeng industrial area
Authors: Law W P , Abdul Aziz B , Rani S I , Gimbun J 
Published: March 2020

Abstract
This paper presents the prediction of hypothetical chlorine leak dispersion around Gebeng industrial area using Areal Location of Hazardous Atmosphere (ALOHA) software. The effect of the different wind speed and direction to chlorine dispersion in the meteorological microscale area was investigated. The wind speed ranging from 1.32 to 10.7 m/s obtained from a local weather station was considered. Heavy gas dispersion model was used to determine the concentration of chlorine plume within the area of concern. The leakage rate was set to correspond to a leakage from the chlorine tank at 792 kg/h. The result showed that the residential areas R1 and R2 are affected by the plume dispersed by southwest and northern winds, respectively. A greater hazard area was found when the wind speed is below 2.3 m/s. Meanwhile, the hazard zone reduced to nearly half when the wind speed is above 5.4 m/s. The appropriate evacuation routes were developed to reduce risk of exposure to toxic gas. Finding from this work is useful to understand the risk of noxious gas dispersion around Gebeng industrial area.
Study on humic acid derived from EFB based vermicompost as biopesticide
Authors: Khiew A A M , Lew J H , Shamsuddin M R , Aqsha  , Mustapa N I , Narasimha M M 
Published: March 2020

Abstract
The increment of global population by 1.1% annually demands higher agricultural yield to ensure sustainable food source which leads to intensive usage of chemical fertilizer and pesticide. However, this practice poses various environmental and health problems which ultimately encourages the development of safer organic fertilizers and bio-pesticides. One potential method is to utilize Humic Acid (HA), a natural plant’s growth promoter, present in organic compost as an environmental-friendly fertilizer as well as insect control agent. This study investigated the effectiveness of HA extracted from vermicompost of Palm Oil Empty Fruit Bunches (EFB) as biopesticide. HA was extracted from the vermicompost via alkaline extraction followed by precipitation in strong acid that resulted in HA mass yield of 2.336%. The insect repellent ability of HA, Garlic Extract (GE) and 87% GE + 13% HA was investigated by spraying the solution onto soil samples in the presence of crickets. The effectiveness of the insect control agents was determined by recording the number of crickets avoiding the infected area. The test revealed that the insects exhibited most repulsive behavior towards 87% GE + 13% HA, followed by HA and lastly GE. The results indicate that HA has the potential to be used as biopesticide, with higher prospect when combined with GE. The dual benefits of HA utilization as plant growth promoter and insect repellent promise a more sustainable approach towards modern agriculture.
Stability analysis and improvement evaluation on residual soil slope: building cracked and slope failure
Authors: Goh J R , Ishak M F , Zaini M S I , Zolkepli M F 
Published: March 2020

Abstract
A case study of the building and road utilities which was loading directly on the slope at IIUM, Kuantan campus was damaged due to slope failure and landslide. This research are conducted to investigate and analyze the soil properties and parameters which affected the stability of residual soil slope against failure by conducting a comprehensive laboratory testing and software analysis. The properties of soil are determined from several physical index tests and shear strength tests. Numerical simulation model from engineering software SLOPE/W were performed to show the stability analysis (Factor of Safety - FOS) of typical residual soil slope without reinforcement and new innovative design of slope with reinforcement. This paper presents two types of slope design which are single reinforcement load and combination reinforcement loads. Through this research it is proved that both single and combination reinforcement load can improve the soil properties and parameters of the residual soil slope. The new slope design successfully proved to produce positive results by achieving up to 82.49% of stability improvement (FOS) within the correct position of reinforcement load added at failure slip surface on the slope.
Monitoring soil slope of tropical residual soil by using tree water uptake method
Authors: Zaini M S I , Ishak M F , Zolkepli M F 
Published: March 2020

Abstract
From years to years, the construction of residential buildings at hill-site in Malaysia will lead to various fatalities event. Cutting down of trees can vanish the reinforcement provided by the root of tree to the soil by means of weakening the soil shear strength due to the increasing value of pore water pressure and decreasing value of effective stress. Root of a tree plays an important part in preventing landslides event to occur either it is by modifying the soil moisture regime via evapotranspiration or providing root reinforcement within the soils. Water uptake by plant roots is fundamental in many applications agriculture. This study is conducted to explores the vegetation approach by using tropical mature tree and monitors the activeness of the root zone of a tree that lies at the top of the slope by which the data of the matric suction generated within this section of the slope is recorded by using Tensiometer and applied to the slope stability problem to increase the value of factor of safety (FOS). Based on the research conducted, it is proven that by using tree water uptake method can increase the FOS of the slope up to 57%. In retrospect, the method used in preventing the landslides event to occur at the slope is economical and eco-friendly which can be implemented globally as this is the most nature method to prevent landslide and required low cost compared to other methods.
Effect of Al Content on Microstructure and Properties of Zn-Cu-Al Alloy
Authors: Wang Hongxing , Zhang Yan , Wang Changsheng , Cao Shuo , Bai Wan , Wu Canhui , Qian Jiahao 
Published: March 2020

Abstract
Zn-Cu-Al zinc alloy was prepared by metal mould casting. The effects of Al addition on the microstructure, electrical conductivity and wear resistance of Zn-Cu-Al alloy were studied. The results show that the structure of Zn-Cu-Al alloy is composed of Zn solid solution containing Cu and Al (η phase), eutectic phase (α+η) and CuZn5 (ε phase); Al0.4Zn0.6 phase appeared when Al addition content exceeded 2.0wt.%; With the increase of Al addition content, eutectic phase (α+η) content increased and η phase grain refined. Meanwhile, the hardness and electrical conductivity of the alloy increase with the increase of Al addition content. When the addition of Al is 5.0 wt.%, the hardness and electrical conductivity of the alloy reach the maximum, 151HV and 26.4% IACS, respectively. The wear mechanism of the alloy is mainly plastic deformation with a mixture mode of plastic deformation and adhesion.
Design and Experimental Study of Wire Saw Machine for Cutting Oil Pipeline
Authors: Cao Liwen , Miao Shuaitong 
Published: March 2020

Abstract
According to the structural characteristics of the oil pipeline, repair cutting quality requirements, designed a special cutting wire saw machine. The structural characteristics of the oil pipeline and the variation of the area of the steel pipe section and the slit width of the oil pipeline are analyzed. The structural form, working principle and technical parameters of the hydraulic power system of the wire saw machine are determined. The wire sawing machine cut the oil pipeline and tested it, and established a mathematical model of the cutting force, two correspondences were obtained, one of which is the beading cutting force and wear rate of the wire saw machine, and the other is the feed speed and cutting speed. Engineering practice has proved that the use of wire saws to cut oil pipelines is an effective cutting method, both cutting quality and cutting efficiency are superior to other cutting methods.
3D Motion Simulation of Engineering Equipment Working Mechanism Based on Reverse Drive Mode
Authors: Chu Weijun , Zhu Zicheng 
Published: March 2020

Abstract
The working mechanism of engineering equipment has a relatively complicated structure which contains many kinematical pairs, its 3D motion simulation is a difficult problem. Based on the reverse drive mode linked by forward kinematics, 3D motion simulation model of working mechanism is analysed, and the kinematic chains are further established. General procedure of reverse drive mode is summed up, and the establishment strategy of reverse kinematic chain is expounded. This paper discussed these problems of adjusting motion axis and restraining DOF in reverse drive mode, and illustrated the controllers which control the form of 3D motion simulation. Through the above method, the 3d motion simulation of the working mechanism is realized. The analysis indicates that the 3D motion simulation of engineering equipment working mechanism based on reverse drive mode have more flexible use, convenient control and lifelike simulation result.
Analysis of Man-machine-environment System in Industrial Design and Comprehensive Evaluation of Products Man-machine Relationship
Authors: Chen Wei 
Published: March 2020

Abstract
The study of safety, reliability and amenity in industrial design is to analyze the factors in the “man-machine-environment” system by means of ergonomics so as to provide reliable design parameters and test data for product design. According to ergonomics, how about the design of product man-machine relationship? Does safety, reliability and suitability meet the design requirements? This requires a more objective and fair evaluation standard. The evaluation of product man-machine system is not only the judgment of the value of the product designed, but also the judgment of the product design results. Based on the analysis of various factors in the “man-machine-environment” system, this paper presents a comprehensive evaluation method of man-machine relationship of products by using fuzzy theory.
Software Implementation Analysis of Fingerprint Identification System
Authors: Liu Ruijie 
Published: March 2020

Abstract
With the fast development of E-time, the scope of Human-Computer Interaction Techniques’ application has become broader and broader. At the same time, the information security and identity verification have drawn increasing attention. Fingerprint recognition technology, which has played an important role in finance, internet, medicine and security fields, develops first, and is relatively more mature in these three. This paper mainly discusses the software part of the fingerprint recognition system. The extract of fingerprint’s image is directly from existing fingerprint database. Then a series of preprocessing, such as the grid, segment, smooth and converge of images, and so on, will be done. By doing these, image features could be extracted, so as to match the images of fingerprint. This paper using an implementation method, based on VC6.0 environment, in the sections of image’s preprocessing and feature matching, which contains 2 easy-operation function modules.
Preparation And Electrochemical Performance of Nano Si@Short Hard Carbon Fiber Composites as Anodes for Lithium Batteries
Authors: Wang J , Liu X Y , Xing A 
Published: March 2020

Abstract
The bamboo paper was soaked by the silica sol. After drying, the nano-silicon@short hard carbon fiber was prepared by vacuum high-temperature carbonization treatment followed by grind, which was one-dimensional composite. The structure and morphology of the composite material were characterized by X-ray diffraction and Scanning electron microscopy (SEM). The results show that the diameter of the short hard carbon fiber is about 2∼8 μm and the length is about several tens of microns. The nano-silicon particles are sparsely distributed on the outer wall of the short bamboo charcoal fiber. The adhesion between nano silicon and short hard carbon fiber is strong due to the effect of thermal diffusion and Van der Waals’ force. The prepared nano-silicon@short hard carbon fiber composite was used as a negative electrode material for lithium battery for charge and discharge test. When the current density was 100 mA.g−1, the capacity was only attenuated by 6.54% after 50 cycles. Meanwhile, the composite also exhibits well rate performance.