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  1. Fulltext Effectiveness of strip footing with geogrid reinforcement for different types of soils in Mosul, Iraq
    Hasan NI, Mohd Taib A, Muhammad NS, Mat Yazid MR, Mutalib AA, Abang Hasbollah DZ
    PLoS One, 2020;15(12):e0243293.
    PMID: 33332375 DOI: 10.1371/journal.pone.0243293
    The main cause of problematic soil failure under a certain load is due to low bearing capacity and excessive settlement. With a growing interest in employing shallow foundation to support heavy structures, it is important to study the soil improvement techniques. The technique of using geosynthetic reinforcement is commonly applied over the last few decades. This paper aims to determine the effect of using geogrid Tensar BX1500 on the bearing capacity and settlement of strip footing for different types of soils, namely Al-Hamedat, Ba'shiqah, and Al-Rashidia in Mosul, Iraq. The analysis of reinforced and unreinforced soil foundations was conducted numerically and analytically. A series of conditions were tested by varying the number (N) and the width (b) of the geogrid layers. The results showed that the geogrid could improve the footing's bearing capacity and reduce settlement. The soil of the Al-Rashidia site was sandy and indicated better improvement than the other two sites' soils (clayey soils). The optimum geogrid width (b) was five times the footing width (B), while no optimum geogrid number (N) was obtained. Finally, the numerical results of the ultimate bearing capacity were compared with the analytical results, and the comparison showed good agreement between both the analyses and the optimum range published in the literature. The significant findings reveal that the geogrid reinforcement may induce improvement to the soil foundation, however, not directly subject to the width and number of the geogrid alone. The varying soil properties and footing size also contribute to both BCR and SRR values supported by the improvement factor calculations. Hence, the output complemented the benefit of applying reinforced soil foundations effectively.
  2. Fulltext Mediating Effects of Fear on Mental Health among Undergraduate Students during Open Distance Learning
    Abu Hasan NI, Ganggayah MD, Suhaimi S, Abu Hasan N, Jamal NF
    Malays J Med Sci, 2023 Dec;30(6):91-107.
    PMID: 38239247 DOI: 10.21315/mjms2023.30.6.10
    BACKGROUND: Online distance learning (ODL) known as the flexible learning environment can trigger a negative impact on students' mental health. The study aimed to identify the influence of fear as mediator between mental health problem and university students' perception on ODL.

    METHODS: This is a cross-sectional study involving a convenient sampling of 258 undergraduate students. Self-administered structured questionnaires adapted from the Depression, Anxiety and Stress Scale-21 (DASS-21) and the Fear of COVID-19 Scale (FCV-19S), were used to assess the severity of psychological symptoms (depression, anxiety and stress) and fear. The perception towards ODL is also designed to assess the students' perception related to ODL implementation. The data were analysed using descriptive statistics and Structural Equation Modelling-Partial Least Square (SEM-PLS).

    RESULTS: Overall, 84.2%, 95.0% and 67.4% of the participants experienced moderate to very severe level of depression, anxiety and stress, respectively. In addition, 82.6% of them suffering with moderate to extreme level of fear, of which 81.8% of participants had a negative view on ODL. The results of SEM-PLS revealed that there are complementary partial mediation effects of fear on the relationship between depression and students' perception during ODL (β = 0.502, t-value = 0.828, P-value = 0.017). The anxiety (β = 0.353, t-value = 5.401, P-value = 0.000) and stress (β = 0.542, t-value = 8.433, P-value = 0.000) have directly influenced on fear.

    CONCLUSION: This study demonstrated that university students had the prevalence of psychological symptoms and fear during ODL. In line with this, fear contributes significantly to the mental health status of university students and has negatively impacted the students' perception during ODL implementation.

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