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The effect of nanosilica sizes in the presence of nonionic TX100 surfactant on CO_(2)foam flooding

Petroleum Research 2022年第1期7卷 62-76页

作者： Suriatie Mat Yusuf Radzuan Junin Mohd Akhmal Muhamad Sidek Muhammad AManan Mohd Fazril Irfan Ahmad Fuad Mohd Zaidi Jaafar Effah Yahya nor roslina rosli Department of Petroleum Engineering School of Chemical and Energy EngineeringFaculty of EngineeringUniversiti Teknologi Malaysia81310Johor BahruMalaysia Institute for Oil and Gas Universiti Teknologi Malaysia81310Johor BahruMalaysia School of Chemical Engineering College of EngineeringUniversiti Teknologi MARA40450 Shah AlamSelangorMalaysia

The aim of this research is to study the effect of hydrophilic silica nanoparticles,sizes as CO_(2) foam stabilizer in the presence of nonionic TX100 *** nanosilica sizes,15 and 70 nm,have been examined *** of TX100 on silica nanoparticles(nanosilica)was characterized by adsorption isotherm and surface tension measurement,while CO_(2) foams stability was quantified based on their foamability,foam stability,particle partitioning in the foams,and bubble *** show that direct contact of TX100 with nanosilica does altered the wettability of hydrophilic nanosilica surface,enable them to lengthen CO_(2) foams life at certain surfactant and nanoparticles *** 15 nm nanosilica,CO_(2) foam stability shows excellent performance at 0.1 and 0.5 wt%TX100 *** for 70 nm nanosilica,CO_(2) foam demonstrates longer lifetime at much lower TX100 concentration,0.01 wt%.Without the presence of TX100,CO_(2) foams exhibit undesirable lifetime performances for both nanosilica *** partitioning in CO_(2) foams structures demonstrate consistent relation with contact angle *** bubble sizes shows insignificant effect on CO_(2) foams *** the assists of nanosilica and TX100,enhanced oil recovery via CO_(2) foam injection succeeds in increasing oil production by 13e22%of original oil-in-place(OOIP).

关键词： Nanoparticle sizes Adsorption Nonionic surfactant TX100 surfactant Foamability CO_(2)foam stability CO_(2)foam flooding EOR

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Screening the synergy of sodium dodecylbenzenesulfonate and carboxymethyl cellulose for surfactant-polymer flooding

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Petroleum Research 2022年第3期7卷 308-317页

作者： Suriatie Mat Yusuf Radzuan Junin Mohd Akhmal Muhamad Sidek Augustine Agi Mohd Fazril Irfan Ahmad Fuad nor roslina rosli norazah Abd Rahman Effah Yahya nor Adilah Muhamad Soffian Wong Muhammad Hazim Mustaza Department of Petroleum Engineering School of Chemical and Energy EngineeringFaculty of EngineeringUniversiti Teknologi Malaysia81310Johor BahruMalaysia Institute for Oil and Gas Universiti Teknologi Malaysia81310Johor BahruMalaysia School of Chemical Engineering College of EngineeringUniversiti Teknologi MARA40450Shah AlamSelangorMalaysia

Carboxymethyl cellulose(CMC)has emerged in oil and gas industries as a superior substitution to the conventional HPAM and xanthan gum(XG)for high viscosity polymer flooding *** this study,the combined effect of conventional surfactant,sodium dodecylbenzenesulfonate(SDBS)and CMC for potential surfactant-polymer(SP)flooding in enhanced oil recovery(EOR)has been ***,SDBS–CMC interaction and the functional groups present in CMC were appropriately *** presence of various C–O bonds signifies the existence of carboxymethyl group which greatly influence the rheological properties of CMC *** behaviour of SDBS–CMC was characterized by their viscosity,shear rate,solubilization,wettability,and surface *** flooding utilizing SDBS-CMC was performed and compared to commercial SDBS-XG SP *** results indicate several SDBS-CMC combinations are favourable for EOR *** viscosity shows direct relationship with CMC ***,at any given SDBS concentrations,significant increment was observed at 0.3 wt%and ***,the trend displayed inconclusive relation to SDBS *** of the SDBS-CMC combinations generate Winsor III emulsions particularly at CMC of 0.2 and 0.3 wt%,while Type II were observed in few *** CMC concentrations increased the contact angle,while gradual reductions were observed with SDBS *** gradual reduction in surface tension was highly influenced by the addition of CMC rather than SDBS.A novel combination of 0.3 wt%SDBS and 0.4 wt%CMC possessed an encouraging criterion in term of viscosity,solubilization,and surface tension reduction for EOR *** experiment from several SDBS-CMC combinations proved to recover additional oil ranging 16.4–20.2%of oil initially in place(OIIP).The trend in incremental oil recovery is similar to that of when utilising SDBS-XG.

关键词： Carboxymethyl cellulose Sodium dodecylbenzenesulfonate Enhanced oil recovery Surfactant-polymer flooding

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High-throughput sequencing reveals dietary segregation in Malaysian babblers

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Current Zoology 2022年第4期68卷 381-389页

作者： Mohammad Saiful Mansor Fasihah Zarifah Rozali Sian Davies Shukor Md nor rosli Ramli Department of Biological Sciences and Biotechnology Faculty of Science and TechnologyUniversiti Kebangsaan Malaysia43600 BangiSelangorMalaysia School of Biological Sciences Universiti Sains Malaysia11800 USM PenangMalaysia Micropathology Ltd University of Warwick Science ParkCoventryCV47EZUK Institute of Biological Sciences Faculty of ScienceUniversity of Malaya50603 Kuala LumpurMalaysia

The coexistence of numerous species within a community results from how those species use available *** are one of the major groups of Malaysian insectivorous birds,which frequently forage in dense vegetation cover and have a high level of ***,examining the diet,prey selection,and niche segregation of babblers can be *** this study,we used high-throughput sequencing to investigate potential dietary overlap or segregation among 10 babbler species of the 4 genera of the family Pellorneidae and Timaliidae:Pellorneum,Malacopteron,Stachyris,and Cyanoderma in central peninsular *** tested the hypothesis that trophically similar species may differ in resource use to avoid competitive *** identified 81 distinct arthropod taxa from fecal samples,belonging to 71 families representing 13 orders,which were predominantly from 16 dipteran,13 lepidopteran,and 10 coleopteran *** all the prey taxa consumed,45%were found to be distinct across the 10 babbler species,and<35%were shared simultaneously by≥3 babbler species,indicating minimal dietary *** black-throated babbler Stachyris nigricollis and moustached babbler Malacopteron magnirostre had the most generalist tendencies because they consumed a greater variety of prey *** dietary overlap values(Ojk)and a relatively wide range of food resources suggest that dietary segregation occurred among the studied *** great diversity of prey consumed revealed the presence of dietary flexibility among the sympatric insectivorous birds,thus reducing any active dietary competition and facilitating the coexistence through niche partitioning.

关键词： coexistence dietary partitioning metabarcoding next-generation sequencing tropical insectivorous birds

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Review:Botnet detection techniques: review, future trends, and issue

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Journal of Zhejiang University-Science C(Computers and Electronics) 2014年第11期15卷 943-983页

作者： Ahmad KARIM rosli Bin SALLEH Muhammad SHIRAZ Syed Adeel Ali SHAH Irfan AWAN nor Badrul ANUAR Faculty of Computer Science and Information Technology University of Malaya Kuala Lumpur Malaysia Department of Computer Science University of Bradford Bradford BD7 1DP UK

In recent years, the Internet has enabled access to widespread remote services in the distributed computing environment; however, integrity of data transmission in the distributed computing platform is hindered by a number of security issues. For instance, the botnet phenomenon is a prominent threat to Internet security, including the threat of malicious codes. The botnet phenomenon supports a wide range of criminal activities, including distributed denial of service(DDoS) attacks, click fraud, phishing, malware distribution, spam emails, and building machines for illegitimate exchange of information/materials. Therefore, it is imperative to design and develop a robust mechanism for improving the botnet detection, analysis, and removal process. Currently, botnet detection techniques have been reviewed in different ways; however, such studies are limited in scope and lack discussions on the latest botnet detection techniques. This paper presents a comprehensive review of the latest state-of-the-art techniques for botnet detection and figures out the trends of previous and current research. It provides a thematic taxonomy for the classification of botnet detection techniques and highlights the implications and critical aspects by qualitatively analyzing such techniques. Related to our comprehensive review, we highlight future directions for improving the schemes that broadly span the entire botnet detection research field and identify the persistent and prominent research challenges that remain open.

关键词： Botnet detection Anomaly detection Network security Attack Defense Taxonomy

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Simple GUI Wireless Controller of Quadcopter

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International Journal of Communications, Network and System Sciences 2013年第1期6卷 52-59页

作者： Dirman Hanafi Mongkhun Qetkeaw Rozaimi Ghazali Mohd nor Mohd Than Wahyu Mulyo Utomo rosli Omar Department of Mechatronic and Robotic Engineering Faculty of Electrical and Electronic Engineering University Tun Hussein Onn Malaysia Batu Pahat Malaysia Department of Power Engineering Faculty of Electrical and Electronic Engineering University Tun Hussein Onn Malaysia Batu Pahat Malaysia

This paper presents the development of remotely operated Quadcopter system. The Quadcopter is controlled through a graphical user interface (GUI) where the communication between GUI and Quadcopter is constructed by using wireless communication system. The Quadcopter balancing condition is sensed by FY90 controller and IMU 5DOF sensor. For smooth landing, Quadcopter is equipped with ultrasonic sensor. All signals from sensors are processed by Arduino Uno microcontroller board and output from the Arduino Uno microcontroller board is implemented to control Quadcopter propellers. The GUI is designed using Visual Basic 2008 Express as interfacing communication between the Proportional, Integral and Derivative (PID) controller and the Quadcopter system. The experiment shows that the Quadcopter system can hover while maintain it balancing and the stability is guaranteed. Moreover, the developed system is able to cope with load disturbance up to 250 gduring the hover position. Maximum operated time of Quadcopter is six minutes using 2200 mAh Lipo battery and operate time can be increased by using largest battery capacity.

关键词： Quadcopter GUI Wireless Arduino Uno PID Controller

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马来西亚社区大学高收入毕业生职业生涯发展中的妥协问题研究

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职业教育研究 2016年第7期 93-96页

作者： Mohd nor Ahmad roslit Mohamad Sattar Rasul Salleh Amat 马来西亚国民大学教育学院

探讨马来西亚社区大学高收入毕业生职业生涯发展中的妥协问题。当毕业生面对个人与工作特性不匹配时,必须做出妥协,即只有放弃或者调整职业发展目标才能获得真正的成功。本研究采用多案例研究法,探讨影响妥协的四个因素和调整职业生涯... 详细信息

探讨马来西亚社区大学高收入毕业生职业生涯发展中的妥协问题。当毕业生面对个人与工作特性不匹配时,必须做出妥协,即只有放弃或者调整职业发展目标才能获得真正的成功。本研究采用多案例研究法,探讨影响妥协的四个因素和调整职业生涯目标的三个妥协过程。影响妥协的因素分别是:有限的就业前景、性别限制、家庭不支持、经济不景气。妥协的表现有:接受声望不太高的工作,选择要求更高、更具有挑战性的工作,选择学习深造。

关键词：妥协调整职业目标高收入

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Geoelectrical Survey for Engineering Investigation

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Open Journal of Geology 2013年第2期3卷 46-49页

作者： A. H. A Teh Saufia rosli Saad M. M. nordiana I. N. Azwin Andy A. Bery Noer El Hidayah Ismail Nisa’ Ali Mark Jinmin Y. C. Kiu S. L. Ragu Ragava R. Geophysics Section School of Physics Universiti Sains Malaysia Penang Malaysia

Water seepage erosion has been and remains one of the major engineering problems. However, most engineers will much depend on borehole data and soil test for designing and problem detection. By considering of the cost and destructive method, selection of geoelectrical prospecting would be appropriate. Therefore, two electrical geophysical surveys were carried out in Sekolah Menengah Kebangsaan Dato’ Haji Mohd nor, Gelugor, Pulau Pinang to map the presence of the unknown underground water sources (saturated zones) and its movement. With the total of seven resistivity lines parallel to each other and self potential (SP) with 5 m × 5 m gridding survey were successfully done. The resistivity result from line 1 (R1) to line 6 (R6) shows the subsurface consist of saturated zones with range between 3 m up to 10 m depth, before it reaches the R7 which is believed as the accumulation zone. Meanwhile, as for SP result it shows the water flow from higher value (north-east) towards the lower value which is mostly at the south area. In conclusion, geoelectrical survey could assist in detecting and solving engineering problems as it proven by the result from each method.

关键词： Geoelectrical 2D Resistivity Self Potential Engineering

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