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| 1 | Issues and mitigations of wind energy penetrated network:Australian network case study显示文摘Longest geographically connected Australian power system is undergoing an unprecedented transition,under the effect of increased integration of renewable energy systems. This change in generation mix has implications for the whole interconnected system designs, its operational strategies and the regulatory framework. Frequency control policies about real-time balancing of demand and supply is one of the prominent and priority operational challenge requiring urgent attention. This paper reviews the Australian electricity market structure in presence of wind energy and its governance. Various issues related to increased wind generation systems integration are discussed in detail. Currently applied mitigations along with prospective mitigation methods requiring new or improved policies are also discussed. It is concluded that developing prospective frequency regulation ancillary services market desires further encouraging policies from governing authority to keep pace with current grid transition and maintain its security. | Asma AZIZ Aman Maung Than OO Alex STOJCEVSKI | 2018 | Journal of Modern Power Systems and Clean Energy2018，6，6： | 4 |
| 2 | Amblyopia screening for first and second-grade children in Jordan显示文摘AIM:To share the results of a national screening program for amblyopia in school children in the north of Jordan.METHODS:This is a prospective national screening study for amblyopia.The program rolls first and second-grade children(6 to 7 years old) in the north of Jordan.The eye examination included:best-corrected visual acuity,cover-uncover test,and cycloplegic retinoscopy.Monocular visual acuity was tested using an ETDRS visual acuity chart without correction.Moreover,children were tested with full cycloplegic refraction when the test criteria were met.Unilateral amblyopia was defined as a best-corrected visual acuity difference of 2 or more lines.In comparison,bilateral amblyopia was defined as a best-corrected visual acuity of 20/40 or worse in the best eye.RESULTS:The prevalence of amblyopia for the total sample tested(n=17 203) was 2.78%(n=479).The most common cause of amblyopia was hypermetropia(64.45%),followed by previous ocular surgeries(15.1%),myopia(10.43%),strabismus(9.39%),and congenital cataract(0.63%).CONCLUSION:This is the first and only study,identifing modifiable risk factors in Jordanian children with amblyopia.In their first couple of years of elementary education,many Jordanian children are affected by amblyopia and pass unnoticed.A more governmental effort is needed into screening programs to improve vision in the Jordanian population. | Khalil M.Al-Salem Mohammad S.Saleem Ismat Ereifej Hamzeh M.Alrawashdeh Rayed Falah Hussein Obeidat Asma Ali Abdlmohdi Raeda Zaki Al-Momani Layal Mohammed Hammad Omar Ahmad al-Habahbeh Yaqeen M.Assassfeh Laith Ramzi Najib Al-Qsous Ashraf Hatim Adeeb Nasraween Tariq A.Al Maaitah Deya'-Aldin Muneer Hasan Aqeel Ibtehal Eyadeh Awad Alabdulrazzg Abdullah Mahmoud Mohammad Murad Amany Jehad Faleh AL-Zurqan Enas Jamal Mohammad Jaradat Slsabela Emad Suliman Aldhoon Ala'a Majed Dmour Ahmad Talal Asassfeh Jeries Ayman Halaseh Abdel Aziz Ammar Daoud Waha Ayman Alkasasbeh Kholoud GH.Matar | 2022 | International Journal of Ophthalmology(English edition)2022，15，2： | 1 |
| 3 | Modeling frequency distributions of tree height, diameter and crown area by six probability functions for open forests of Quercus persica in Iran显示文摘The prediction of the distribution of quantitative variables in a forest stand is of great interest to forest managers, for the evaluation of forest resources and scheduling of future silvicultural treatments. The aim of this research was to model the distribution of quantitative variables for Quercus persica in open forests in Iran. To investigate the probability distribution of trees in natural stands, 642 trees were selected for measurement using a systematic random sampling method. Selected trees were measured and data were analyzed. Gamma, beta, normal,lognormal, exponential and Weibull probability distributions were fitted to the height distribution of trees. Variables of distribution functions were estimated using the maximum likelihood estimation method. Actual probability and probability which derived from functions was compared using Kolmogorov–Smirnov and Anderson–Darling tests. Beta, Weibull and Weibull probability distributions explained the distributions of tree height, DBH and crown area. | Mehrdad Mirzaei Jalal Aziz Ali Mahdavi Asma Mohammad Rad | 2016 | Journal of Forestry Research2016，27，4： | 1 |
| 4 | Effects of Tualang honey in modulating nociceptive responses at the spinal cord in offspring of prenatally stressed rats显示文摘Objective: This study was done to determine whether Tualang honey could prevent the altered nociceptive behaviour, with its associated changes of oxidative stress markers and morphology of the spinal cord,among the offspring of prenatally stressed rats.Methods: Pregnant rats were divided into three groups: control, stress, and stress treated with Tualang honey. The stress and stress treated with Tualang honey groups were subjected to restraint stress from day 11 of pregnancy until delivery. Ten week old male offspring(n = 9 from each group) were given formalin injection and their nociceptive behaviours were recorded. After 2 h, the rats were sacrificed, and their spinal cords were removed to assess oxidative stress activity and morphology. Nociceptive behaviour was analysed using repeated measures analysis of variance(ANOVA), while the levels of oxidative stress parameters and number of Nissl-stained neurons were analysed using a one-way ANOVA.Results: This study demonstrated that prenatal stress was associated with increased nociceptive behaviour, changes in the oxidative stress parameters and morphology of the spinal cord of offspring exposed to prenatal stress; administration of Tualang honey reduced the alteration of these parameters.Conclusion: This study provides a preliminary understanding of the beneficial effects of Tualang honey against the changes in oxidative stress and neuronal damage in the spinal cord of the offspring of prenatally stressed rats. | Che Badariah Abd Aziz Siti Qusyasyiah Ahmad Suhaimi Hidani Hasim Asma Hayati Ahmad Idris Long Rahimah Zakaria | 2019 | Journal of Integrative Medicine2019，17，1： | 0 |
| 5 | Depression,Anxiety,and Behavioural Changes during the COVID-19 Pandemic among Medical and Nursing Students显示文摘During the COVID-19 pandemic,medical and nursing students are faced with various challenges such as the need to attend online classes and juggling clinical postings under the new norm.This study aimed to assess the asso-ciation between depression,anxiety,and behavioural changes among medical and nursing students during the COVID-19 pandemic.An online self-administered questionnaire was distributed between March 2021 and July 2021 to 292 undergraduates medical and nursing students in a higher education institute on the East Coast of Malaysia.The questionnaires consisted of four parts:sociodemographic data,the Generalised Anxiety Disor-der-7,the Patient Health Questionnaire-9,and questions related to behaviours during the COVID-19 pandemic.This study found that 23.6%and 33.6%of the students experienced anxiety and depression respectively,possibly caused by the COVID-19 pandemic.Anxiety was associated with a high level of behavioural changes during the pandemic with a total of 87%of the students showing behavioural changes.Therapeutic interventions such as online counselling and consultation should be implemented by the university to reduce the prevalence of depres-sion and anxiety resulting from the COVID-19 pandemic among medical and nursing students. | Siti Roshaidai Mohd Arifin Siti Mardhiah Saiful Azmi Khadijah Hasanah Abang Abdullah Nurul Ain Hidayah Abas Rohayah Husain Edre MAidid Karimah Hanim Abd Aziz Ramli Musa Fathima Begum Syed Mohideen Asma Perveen Khairi Che Mat Izazol Idris | 2022 | International Journal of Mental Health Promotion2022，24，5： | 0 |
| 6 | Low-voltage ride-through capability improvement of Type-3 wind turbine through active disturbance rejection feedback control-based dynamic voltage restorer显示文摘Disconnections due to voltage drops in the grid cannot be permitted if wind turbines(WTs)contribute significantly to electricity pro-duction,as this increases the risk of production loss and destabilizes the grid.To mitigate the negative effects of these occurrences,WTs must be able to ride through the low-voltage conditions and inject reactive current to provide dynamic voltage support.This paper investigates the low-voltage ride-through(LVRT)capability enhancement of a Type-3 WT utilizing a dynamic voltage restorer(DVR).During the grid voltage drop,the DVR quickly injects a compensating voltage to keep the stator voltage constant.This paper proposes an active disturbance rejection control(ADRC)scheme to control the rotor-side,grid-side and DVR-side converters in a wind–DVR integrated network.The performance of the Type-3 WT with DVR topology is evaluated under various test conditions using MATLAB®/Simulink®.These simulation results are also compared with the experimental results for the LVRT capability performed on a WT emulator equipped with a crowbar and direct current(DC)chopper.The simulation results demonstrate a favourable transient and steady-state response of the Type-3 wind turbine quantities defined by the LVRT codes,as well as improved reactive power support under balanced fault conditions.Under the most severe voltage drop of 95%,the stator currents,rotor currents and DC bus voltage are 1.25 pu,1.40 pu and 1.09 UDC,respectively,conforming to the values of the LVRT codes.DVR controlled by the ADRC technique significantly increases the LVRT capabilities of a Type-3 doubly-fed induction generator-based WT under symmetrical voltage dip events.Although setting up ADRC controllers might be challenging,the proposed method has been shown to be extremely effective in reducing all kinds of internal and external disturbances. | El Mahfoud Boulaoutaq Asma Aziz Abdelmounime El Magri Ahmed Abbou Mohamed Ajaamoum Azeddine Rachdy | 2023 | Clean Energy2023，7，5： | 0 |
| 7 | Chenopodium ambrosioides induces an endothelium-dependent relaxation of rat isolated aorta显示文摘Objective: This study aims to evaluate the vasodilatory effect of Chenopodium ambrosioides on the isolated rat aorta, and to explore its mechanism of action.Methods: The vasorelaxant effect and the mode of action of various extracts from the leaves of C. ambrosioides were evaluated on thoracic aortic rings isolated from Wistar rats. In addition, ethyl acetate and methanol fractions were analyzed, using thin-layer chromatography and high-performance liquid chromatography techniques, for their polyphenolic content.Results: The various active extracts of C. ambrosioides at four concentrations(10^(-3), 10^(-2), 10^(-1) and 1 mg/mL) relaxed the contraction elicited by phenylephrine, in a concentration-dependent manner.This effect seems to be endothelium-dependent, since the vasodilatory effect was entirely absent in denuded aortic rings. The vasorelaxant effect of the methanol fraction(MF) of C. ambrosioides at 1 mg/mL was also inhibited by atropine and tetraethylammonium. This effect remained unchanged by Nx-nitro-L-arginine methyl ester hydrochloride and glibenclamide. The preliminary phytochemical analysis showed that the leaves of C. ambrosioides are rich in phenolic and flavonoid derivatives.Conclusion: These results suggest that the MF of C. ambrosioides produces an endothelium-dependent relaxation of the isolated rat aorta, which is thought to be mediated mainly through stimulation of the muscarinic receptors, and probably involving the opening of Ca^(2+)-activated potassium channels. | Asmae Assaidi Ikram Dib Monique Tits Luc Angenot Said Bellahcen Nourelhouda Bouanani Abdelkhaleq Legssyer Mohammed Aziz Hassane Mekhfi Mohammed Bnouham Michel Frederich Abderrahim Ziyyat | 2019 | Journal of Integrative Medicine2019，17，2： | 0 |
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