Characterization of prepared eco-friendly biochar from almond (Terminalia catappa L) leaf for sequestration of bromophenol blue (BPB) from aqueous solution

Jabar Jamiu Mosebolatan,Owokotomo Ignatius Adekunle,Ayinde Yusuf Timilehin,Alafabusuyi Ayodele Modupe,Olagunju Gbolahan Olusayo,Mobolaji Victor Oluwafemi 한국탄소학회 2021 Carbon Letters Vol.31 No.5

Novel eco-friendly adsorbents were prepared through pyrolysis and acid activation of raw almond leaf (RAL) to form almond leaf biochar (ALB) and chemically activated almond leaf biochar (CAL), respectively. The prepared adsorbents were characterized using TGA, FTIR, SEM–EDX, BET and XRD techniques and their physicochemical properties investigated. RAL, ALB and CAL were utilized for adsorption of BPB dye from aqueous solution using batch technique under optimum conditions. The optimum dye adsorbed by RAL, ALB and CAL were 92.83, 93.21 and 94.89%, respectively at pH 3, dye initial conc. (100 mg/L), adsorbent dose (0.04 g/25 mL), 60 min contact time and 301 K adsorption temperature. Although, Langmuir maximum monolayer adsorption capacities were found to be 365.36, 535.62 and 730.46 mg/g for RAL, ALB and CAL, respectively, but isotherm conformed to Freundlich model. Kinetic study confrmed suitability of pseudo-second-order model with rate constant 9.33×10–4, 9.91×10–4 and 12.60×10−4 g mg−1 min−1 for RAL, ALB and CAL, respectively. Negative values of thermodynamic parameters (∆G and ∆H) established sequestration process to be spontaneous and exothermic. RAL, ALB and CAL were discovered to be highly efcient adsorbents that could be used in place of expensive commercial adsorbents.

A Constrained Predictive Controller for AUV and Computational Optimization Using Laguerre Functions in Unknown Environments

Ali Jabar Rashidi,Bahram Karimi,Ayoub Khodaparast 제어·로봇·시스템학회 2020 International Journal of Control, Automation, and Vol.18 No.3

In this paper, a predictive controller approach is proposed for depth and steer control of an Autonomous Underwater Vehicle (AUV). The predictive controller is an advanced control technique that performs control in form of online at any sampling time. AUV control has a lot of complexity due to the coupled nonlinear dynamics, parametric uncertainty and external disturbances due to underwater conditions. In addition, the AUV in this paper has constraints on actuators, which make its control more complicated. One of the challenges against implementing of predictive controller is their computational burden and the time consuming control operations at each time step. In this research, the Laguerre orthogonal functions are used for the predictive controller design to optimize and educe computational burden in time interval. The designed controller has several advantages such as being online and optimized, high accuracy, implementation capability, interaction with the constraints and robustness to disturbances. In order to demonstrate the efficiency of the method, the proposed controller is simulated for the AUV and the calculation time of the controllers with and without the Laguerre functions is compared with each other. Using Laguerre functions, the simulation results and their implementation on the board show the favorable efficiency and effectiveness of the proposed controller. Additionally, we have compared the proposed method with the LQR method. The obtained results confirm the superiority of various predictive controller methods.

Color and fastness properties of mordanted Bridelia ferruginea B dyed cellulosic fabric

Jamiu Mosebolatan Jabar,Ademola Israel Ogunmokun,Tella Adewale Akanni Taleat 한국의류학회 2020 Fashion and Textiles Vol.7 No.1

Bridelia ferruginea B dye was extracted from the bark of the tree using aqueous extraction method. Extracted dye was used to dye cellulosic (cotton) fabric in presence of 5% calcium chloride ( CaCl2) or 5% alum (KAl(SO4)2·12H2O) of weight of fabric (o.w.f ) as mordant. Fabric dyed without mordant was lighter in hue than metal ion mordanted dyed fabrics. The fabrics dyed in presence of calcium chloride as mordant are of deeper hue than those dyed with alum as mordant. Hence, their dye-uptake and color strength (K/S) are in the same order. K/S value of fabric dyed with alum is 43.71% higher than that without mordant and fabric dyed with calcium chloride has K/S value 51.09% higher than dyed with alum as mordant. CIEL*a*b* coordinate indicator and color space quadrant showed that those dyed fabrics without mordant and with alum as mordant are closer to yellow than red color. Those cellulosic fabrics dyed with calcium chloride as mordant are closer to red than yellow color as confirmed in colour space quadrant. Pre-mordanted dyed fabrics are of deeper color than post-mordanted dyed fabrics than meta-mordanted dyed fabrics than unmordant dyed fabric. Fastness properties of B. ferruginea B dyed cellulosic fabrics ranged from good (3) to excellent (5).

Tribological Evaluation of Self-Lubricating Material

Muhammad Zarif Bin Abdul Jabar,H. Pyung,S.S. Kim 한국트라이볼로지학회 2015 한국트라이볼로지학회 학술대회 Vol.2015 No.4

후세인체제의 기반은 어디 있나

쟈발, 파레하 한국민족연구원 2003 민족연구 Vol.0 No.10

Dynamic analysis of train-bridge system under one-way and two-way high-speed train passing

Meysam Jahangiri,Jabar-Ali Zakeri 국제구조공학회 2017 Structural Engineering and Mechanics, An Int'l Jou Vol.64 No.1

In this paper, the dynamic responses of train-bridge system under one-way and two-way high-speed train passing are studied. The 3D finite element modeling is used and the bridge and train are modeled considering their details. The created model is validated by the results of the dynamic field test. To study the effect of train speed, different train passing scenarios are analyzed, including one-way passing, two-way passing in different directions at same speeds, and two-way passing in different directions at different speeds. The results show that the locations of maximum acceleration are different in one-way and two-way passing modes, and the maximum values in two-way passing mode are higher than those in one-way passing mode, while the maximum accelerations in both modes are almost identical. The displacement and acceleration values in different scenarios show peaks at speeds of 260 and 120 km/h, due to the proximity of the natural frequencies of the bridge and loading frequencies of the train at these speeds.

Agricultural Irrigation Control using Sensor-enabled Architecture

Khaled Abdalgader,Jabar H. Yousif 한국인터넷정보학회 2022 KSII Transactions on Internet and Information Syst Vol.16 No.10

Cloud-based architectures for precision agriculture are domain-specific controlled and require remote access to process and analyze the collected data over third-party cloud computing platforms. Due to the dynamic changes in agricultural parameters and restrictions in terms of accessing cloud platforms, developing a locally controlled and real-time configured architecture is crucial for efficient water irrigation and farmers management in agricultural fields. Thus, we present a new implementation of an independent sensor-enabled architecture using variety of wireless-based sensors to capture soil moisture level, amount of supplied water, and compute the reference evapotranspiration (ETo). Both parameters of soil moisture content and ETo values was then used to manage the amount of irrigated water in a small-scale agriculture field for 356 days. We collected around 34,200 experimental data samples to evaluate the performance of the architecture under different agriculture parameters and conditions, which have significant influence on realizing real-time monitoring of agricultural fields. In a proof of concept, we provide empirical results that show that our architecture performs favorably against the cloud-based architecture, as evaluated on collected experimental data through different statistical performance models. Experimental results demonstrate that the architecture has potential practical application in a many of farming activities, including water irrigation management and agricultural condition control.

Crosscutting Concern Domain Library Listing Composition for Early Aspect Discovery

Hema Subramaniam,Hazura Zulzalil,Marzanah A.Jabar,Saadah Hassan 보안공학연구지원센터 2014 International Journal of Software Engineering and Vol.8 No.8

Assessing Cultural, Linguistic, and Indigenous Competencies: The Case of Early Childhood Care and Development Teachers in the Philippines

Hazel T. Biana,Roberto Javier Jr.,Melvin Jabar The Pacific Early Childhood Education Research Ass 2021 Asia-Pacific journal of research in early childhoo Vol.15 No.1

As a country with highly diverse local languages, cultures and indigenous groups, the Philippines’ Early Childhood Care and Development Council (ECCD) developed a manual for teachers that prescribes specific cultural, linguistic and indigenous competency standards. To determine the ECCD teachers’ levels in these competencies, this study utilizes self-assessment and supervisors’ assessment surveys. With the involvement of 274 teachers (locally known either as Child Development Workers or Teachers) in 12 areas all over the country, we reveal that their levels range from beginner to performer, with no skilled ratings. We conclude that although teachers are aware of the children’s cultural differences and respect their languages, and they somewhat provide a culturally-supportive environment, there seems to be a need for more training on designing an inclusive curriculum as evidenced by low ratings in planning and implementation. To improve the levels of competencies in the future, we recommend interventions such as the development of policies and frameworks on integration of indigenous cultures in early childhood education, training and revisiting of qualification standards in hiring, and the integration of professional learning communities with the Philippine commissions handling arts, language, and indigenous cultures.

Effects of aflatoxin B1 combined with ochratoxin A and/or zearalenone on metabolism, immune function, and antioxidant status in lactating dairy goats

Huang, Shuai,Zheng, Nan,Fan, Caiyun,Cheng, Ming,Wang, Shang,Jabar, Adil,Wang, Jiaqi,Cheng, Jianbo Asian Australasian Association of Animal Productio 2018 Animal Bioscience Vol.31 No.4

Objective: This experiment investigated the effects of aflatoxin B1 (AFB1) alone or mixed with ochratoxin A (OTA) and/or zearalenone (ZEA) on the metabolism, immune function, and antioxidant status of dairy goats. Methods: Fifty lactating Laoshan dairy goats were randomly assigned to one of five treatment groups (n = 10) for 14 days. Goats were fed no additive (control) or administered with $50{\mu}g\;AFB1/kg$ dry matter (DM) (AFB1), $50{\mu}g\;AFB1/kg$ $DM+100{\mu}g\;OTA/kg$ DM (AFB1+OTA), $50{\mu}g\;AFB1/kg$ $DM+500{\mu}g\;ZEA/kg$ DM (AFB1+ZEA), or $50{\mu}g\;AFB1/kg$ $DM+100{\mu}g\;OTA/kg$ $DM+500{\mu}g\;ZEA/kg$ DM (AFB1+OTA+ZEA). Results: Dry matter intake and milk production were lower in goats fed AFB1+OTA+ZEA than in controls. Supplementation with AFB1, OTA, and ZEA significantly decreased red blood cell count, hematocrit, mean corpuscular volume, mean corpuscular hemoglobin, and mean platelet volume, and significantly increased white blood cell count, when compared with the control group. Compared with control, the combination of AFB1, OTA, and ZEA significantly increased alanine aminotransferase (ALT) and alkaline phosphatase (ALP) activities, total bilirubin (TBIL), interleukin-6, and malondialdehyde (MDA), but significantly reduced immunoglobulin A concentration, the activities of superoxide dismutase (SOD) and glutathione peroxides (GSH-Px), and total antioxidant capacity (T-AOC) in serum. Administration of AFB1 combined with OTA led to higher ALP, ALT, TBIL, and MDA, as well as lower milk production, SOD and GSH-Px activities, and T-AOC, than administration of AFB1 combined with ZEA. Conclusion: The mixture of AFB1, OTA, and ZEA exerted the greatest adverse effects on dairy goats, meanwhile the deleterious damage of the other mycotoxin combinations were in varying degrees. The findings of this study could provide guidance for the prevention and treatment of the consequences of contamination of animal feeds with combinations of mycotoxin.