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Healthcare practitioners’ attitudes toward patient safety in hospital settings in Jeddah, Kingdom of Saudi Arabia 在吉达,沙特阿拉伯王国,医疗从业人员对医院环境中患者安全的态度
Q4 Business, Management and Accounting Pub Date : 2023-09-28 DOI: 10.1108/agjsr-03-2023-0113
Hani Atwa, Anas Alfadani, Joud Damanhori, Mohamed Seifalyazal, Mohamed Shehata, Asmaa Abdel Nasser
Purpose Patient safety focuses on minimizing risks that might occur to patients during provision of healthcare. The purpose of this study was to explore healthcare practitioners’ attitudes towards patient safety inside different hospital settings in Jeddah, Kingdom of Saudi Arabia. Design/methodology/approach A descriptive, cross-sectional study was conducted on a sample of healthcare practitioners in main hospitals in Jeddah. Two main hospitals (one governmental and one private) were selected from each region of Jeddah (east, west, north and south), with a total number of eight out of thirty hospitals. Data were collected through the Attitudes to Patient Safety Questionnaire III that was distributed online. The questionnaire used a 5-point scale. Descriptive statistics were used. Comparisons were made by independent t -test and ANOVA. The statistical significance level was set at p < 0.05. Findings The study included 341 healthcare practitioners of different sexes and specialties in eight major governmental and private hospitals in Jeddah. “Working hours as error cause” subscale had the highest mean score (4.03 ± 0.89), while “Professional incompetence as error cause” had the lowest mean score (3.49 ± 0.97). The total questionnaire had a moderate average score (3.74 ± 0.63). Weak correlations between the average score of the questionnaire and sex, occupation and workplace were found (−0.119, −0.018 and −0.088, respectively). Practical implications Hospitals need to develop targeted interventions, including continuing professional development programs, to enhance patient safety culture and practices. Moreover, patient safety training is required at the undergraduate education level, which necessitates health professions education institutions to give more attention to patient safety education in their curricula. Originality/value The study contributed to the existing literature on patient safety culture in hospital settings in Jeddah, Saudi Arabia. The insights generated by the study can inform targeted interventions to enhance patient safety culture in hospitals and improve patient outcomes.
目的患者安全的重点是尽量减少在提供医疗保健期间可能发生在患者身上的风险。本研究的目的是探讨在吉达,沙特阿拉伯王国不同的医院设置内的医护人员对患者安全的态度。设计/方法/方法对吉达主要医院的保健从业人员样本进行了一项描述性横断面研究。从吉达的每个地区(东、西、北、南)选出两家主要医院(一所公立医院和一所私立医院),从30家医院中选出8家。通过在线分发的“患者安全态度问卷III”收集数据。调查问卷采用5分制。采用描述性统计。比较采用独立t检验和方差分析。统计学显著性水平为p <0.05. 该研究包括吉达8家主要政府和私立医院的341名不同性别和专业的保健从业人员。“工作时间作为错误原因”分量表平均得分最高(4.03±0.89),“专业能力不足作为错误原因”分量表平均得分最低(3.49±0.97)。问卷总分为中等平均(3.74±0.63)分。问卷平均分与性别、职业、工作场所呈弱相关(分别为- 0.119、- 0.018、- 0.088)。医院需要制定有针对性的干预措施,包括持续的专业发展计划,以加强患者安全文化和实践。此外,在本科教育阶段需要进行患者安全培训,这就要求卫生专业教育机构在其课程中更加重视患者安全教育。独创性/价值本研究对沙特阿拉伯吉达医院环境中患者安全文化的现有文献作出了贡献。该研究产生的见解可以为有针对性的干预提供信息,以加强医院的患者安全文化并改善患者的预后。
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引用次数: 0
Serum VCAM-1 reduction by phytosomal curcumin formulation in rats on a high-fat diet 高脂饮食大鼠血清VCAM-1通过植物体姜黄素配方降低
Q4 Business, Management and Accounting Pub Date : 2023-09-28 DOI: 10.1108/agjsr-02-2023-0092
Rima Abdul Razzak, Ghada Al Kafaji, Mohammad Nadir Khan, Amar Muhsin Marwani, Yahya M. Naguib
Purpose This paper aims to evaluate the effect of consumption of a high-fat diet (HFD) rich with total saturated fats on adiposity and serum levels of vascular cell adhesion molecule (sVCAM-1), a biomarker of endothelial inflammation/dysfunction. Another aim is to evaluate whether supplementation of a phytosomal formulation of curcumin would reduce adiposity measures and sVCAM-1 levels in HFD rats. Design/methodology/approach The study was conducted on 17 male rats which were allocated to one of three feeding regimen groups: normal diet (ND); HFD, or HFD with dietary phytosomal curcumin (HFD-C). Anthropometric measures were recorded weekly up to 20 weeks of feeding intervention, at the end of which, sVCAM-1 levels were also compared with one-way ANOVA and Tukey post-hoc analysis. Findings The HFD group had the greatest values for raw anthropometric data, and there was a group difference in anthropometric measures, however there was no significant difference between HFD and HFD-C for any measure. The gain at 20 weeks from initial values did reveal significant differences in weight and abdominal circumference between HFD and HFD-C groups. There were significant group differences in sVCAM-1 levels, with only HFD-C displaying significant lower levels than HFD group. Originality/value This is the first study that shows the capacity of a phytosomal formulation of curcumin in reducing adiposity and sVCAM-1 levels during daily intake of saturated fats above the recommended level. The results are promising in that this formulation can protect against endothelial inflammation/dysfunction, and can be used as complimentary therapy to suppress dyslipidemia/obesity-related cardiovascular complications.
本研究旨在评估食用富含饱和脂肪的高脂肪饮食(HFD)对肥胖和血清血管细胞粘附分子(sVCAM-1)水平的影响,sVCAM-1是内皮炎症/功能障碍的生物标志物。另一个目的是评估补充姜黄素的植物体制剂是否会降低HFD大鼠的肥胖测量和sVCAM-1水平。设计/方法/方法17只雄性大鼠被分为三组:正常饮食组(ND);HFD,或HFD与膳食植物体姜黄素(HFD- c)。每周记录人体测量数据,直到喂养干预20周,在喂养干预结束时,sVCAM-1水平也通过单因素方差分析和Tukey事后分析进行比较。HFD组的原始人体测量数据值最高,人体测量值存在组间差异,但HFD和HFD- c在任何测量值上均无显著差异。与初始值相比,20周时的增加确实显示了HFD组和HFD- c组在体重和腹围上的显著差异。各组sVCAM-1水平差异有统计学意义,只有HFD- c组sVCAM-1水平显著低于HFD组。这是第一个显示姜黄素植物体制剂在每日摄入饱和脂肪超过推荐水平时降低肥胖和sVCAM-1水平的能力的研究。结果是有希望的,因为这种配方可以防止内皮炎症/功能障碍,并且可以用作抑制血脂异常/肥胖相关心血管并发症的辅助疗法。
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引用次数: 0
The impact of integrating a compulsory community-oriented research program within undergraduate medical curriculum on graduates' scientific publications: perspectives from Arabian Gulf University 在本科医学课程中整合强制性社区导向研究计划对毕业生科学出版物的影响:来自阿拉伯湾大学的观点
Q4 Business, Management and Accounting Pub Date : 2023-09-22 DOI: 10.1108/agjsr-01-2023-0035
Salman Alzayani, Khaldoon Al-Roomi, Ahmed Jaradat, Ali M. Hamdi, Mohamed H. Shehata
Purpose Medical schools aspire to graduate doctors who are competent in interpreting, conducting and publishing scientific research. Hence, the purpose of the paper is explore the impact of a structured compulsory community-oriented, project-based research program in the undergraduate medical curriculum on medical graduates’ future careers, publications and motivation for scientific research. Design/methodology/approach An online questionnaire was sent through the Alumni Association of the Arabian Gulf University (AGU) to medical graduates who have valid email addresses, seeking information on their scientific productivity along with demographic and current employment data. Responses were collated and analyzed using a standard statistical software package. The chi-square test and p-value were calculated. P-value <0.05 was considered statistically significant. Findings Completed forms were received from 91 medical graduates. In this sample, almost a quarter of the respondents have published a research paper out of their undergraduate research project, and about 50% have published at least one paper (as main or co-author) after graduation. Both demographic and medical specialty was not related to the doctor's perception of the benefits they have attained from the compulsory undergraduate research program. However, medical graduates who are at senior levels in their medical careers and those who are employed in secondary healthcare are significantly more likely to publish research papers. Originality/value The compulsory community-oriented, project-based research program in AGU has positively contributed to the research productivity of graduates, and it would be worthwhile to include such programs as an integral part of the undergraduate medical curriculum.
医学院校渴望培养能够胜任科学研究的口译、指导和发表的博士研究生。因此,本文的目的是探讨在本科医学课程中,以社区为导向,以项目为基础的结构化强制性研究计划对医学毕业生未来职业,出版物和科学研究动机的影响。设计/方法/方法通过阿拉伯湾大学校友会(AGU)向拥有有效电子邮件地址的医学毕业生发送了一份在线问卷,以了解他们的科学生产力以及人口统计和当前就业数据。使用标准统计软件包对反馈进行整理和分析。计算卡方检验和p值。p值<0.05认为有统计学意义。调查结果:91名医学毕业生填写了完整的表格。在这个样本中,近四分之一的受访者发表了一篇本科研究项目的研究论文,约50%的受访者在毕业后至少发表了一篇论文(作为主要或共同作者)。人口统计学和医学专业与医生对他们从必修本科研究项目中获得的好处的看法无关。然而,那些在医疗事业中处于高级水平的医学毕业生和那些在二级医疗机构工作的人更有可能发表研究论文。AGU以社区为导向,以项目为基础的强制性研究项目对毕业生的研究生产力做出了积极的贡献,将这些项目作为本科医学课程的组成部分是值得的。
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引用次数: 0
Medical students' perceptions of introducing medical terms in Arabic within a curriculum taught in English: a descriptive study 医学生对在英语授课课程中引入阿拉伯语医学术语的看法:一项描述性研究
Q4 Business, Management and Accounting Pub Date : 2023-09-12 DOI: 10.1108/agjsr-02-2023-0090
Yasin I. Tayem, Amer J. Almarabheh
Purpose All colleges of medicine in the Gulf Cooperation Council (GCC) adopt English as a language of instructions. This study aimed to examine medical students' views on introducing medical terminology in Arabic within an English-based curriculum. Design/methodology/approach This descriptive study targeted preclinical second- and fourth-year students in the College of Medicine and Medical Sciences at the Arabian Gulf University, during the academic year 2022–2023 (n = 407). Within the pharmacology teaching material in unit I (second year) and unit VIII (fourth year), which are taught in English, students were provided with medical terms in Arabic. At the end of these two units, students' views were sought by using a self-administered questionnaire. Findings The number of respondents was 263 (response rate 64.1%: 22.2% males, 77.8% females). Most participants received their school education mainly in Arabic (78.8%). A significant percentage of students believed that providing Arabic terms helped their learning (79.8%). If pharmacology is taught exclusively in English, majority of the students anticipated to face difficulties when explaining drug treatment to their patients in the future (71.3%). Most respondents expected this intervention to help them communicate with patients (86.7%), and preferred to include it in the clinical skills training (82.2%). The second-year students and those whose school education was mainly in Arabic were more likely to agree to the intervention ( p < 0.05 for both). Originality/value The introduction of medical terms in Arabic is an acceptable alternative to complete Arabization, and is believed to help students in their learning and communication with their patients.
海湾合作委员会(GCC)的所有医学院都采用英语作为教学语言。本研究旨在探讨医学生对在以英语为基础的课程中引入阿拉伯语医学术语的看法。本描述性研究以2022-2023学年阿拉伯湾大学医学与医学科学学院临床前二年级和四年级学生为研究对象(n = 407)。在以英语授课的第一单元(二年级)和第八单元(四年级)的药理学教材中,向学生提供阿拉伯文的医学术语。在这两个单元结束时,学生们通过使用自我管理的问卷来征求意见。结果调查对象263人,回复率64.1%,其中男性22.2%,女性77.8%。大多数参与者主要以阿拉伯语接受学校教育(78.8%)。很大比例的学生认为提供阿拉伯语术语有助于他们的学习(79.8%)。如果药理学完全用英语授课,大多数学生预计将来在向患者解释药物治疗时会遇到困难(71.3%)。大多数受访者(86.7%)希望这种干预能帮助他们与患者沟通,并倾向于将其纳入临床技能培训(82.2%)。二年级学生和学校教育以阿拉伯语为主的学生更有可能同意干预(p <两者均为0.05)。引进阿拉伯语医学术语是完全阿拉伯化的一种可接受的替代方法,据信有助于学生的学习和与病人的交流。
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引用次数: 0
Vitamin D, calcium and caffeine intake relationship to bone mineral density 维生素D,钙和咖啡因的摄入与骨密度的关系
Q4 Business, Management and Accounting Pub Date : 2023-08-14 DOI: 10.1108/agjsr-02-2023-0051
Bodour Mubarak, M. Ahmed, N. Hussein, M. Ibrahim
PurposeThis study aims to evaluate the caffeinated drinks, levels of vitamin D and calcium in the blood, and their relationship to bone mineral density (BMD) in osteoporotic women in Al-Ahsa Saudi Arabia.Design/methodology/approachThis study included 85 women over approximately 18 months with ages ranging from 40 to 70 years who were evaluated in the laboratory via blood analysis. Moreover, sociodemographic data and information on health and nutritional awareness were collected via a questionnaire. The BMD was measured by dual-energy X-ray absorptiometry (DXA) and considered osteopenia when the T value total of the lumbar spine or hip was between −1 and −2.5 and osteoporosis < −2.5. Blood levels of vitamin D and calcium were measured via blood analysis.FindingsThere were 54.1% and 45.9% of women who suffered from osteoporosis and low BMD, respectively. There was a significant difference in the number of osteoporotic, and low bone mineral mass groups in marital status (p = 0.04), but no difference was found in age and educational level. A significant difference (p = 0.01) between low bone mass and osteoporosis groups in heights. BMD was significantly and negatively correlated with vitamin D in the blood in individuals with osteoporosis (r = −0.358, P = 0.014). In addition, there was a significant negative correlation between calcium in the blood and total samples (r = −0.355, P = 0.0578). There was a negative significant relationship between calcium supplements and BMD in individuals with low BMD (rt = −0.279, P = 0.041). There was a significant association between cola intake with the occurrence of low BMD (p = 0.027), whereas tea drinking was not associated with risk in both groups.Originality/valueThe study indicated that there is a direct relationship between osteoporosis and low bone mass with different variables. This study was conducted to address the lack of research related to the levels of vitamin D and calcium in the blood and their relationship with BMD in women with low BMD and osteoporosis in Al-Ahsa province-KSA.
目的本研究旨在评估含咖啡因饮料、血液中维生素D和钙的水平及其与骨质疏松症妇女骨密度(BMD)的关系。设计/方法/方法本研究纳入85名年龄在40至70岁之间的女性,年龄约为18个月,在实验室通过血液分析对其进行评估。此外,还通过调查问卷收集了有关健康和营养意识的社会人口数据和信息。采用双能x线骨密度仪(DXA)测定骨密度,当腰椎或髋关节的T值总和在−1 ~−2.5之间且骨质疏松症<−2.5时,认为骨量减少。通过血液分析测量血液中维生素D和钙的含量。研究结果骨质疏松和骨密度低的女性比例分别为54.1%和45.9%。骨质疏松、低骨量组的婚姻状况差异有统计学意义(p = 0.04),年龄、文化程度差异无统计学意义(p = 0.04)。骨质疏松组与低骨量组在身高上的差异有统计学意义(p = 0.01)。骨质疏松症患者骨密度与血液中维生素D呈显著负相关(r = - 0.358, P = 0.014)。血钙含量与总样品呈显著负相关(r = - 0.355, P = 0.0578)。在骨密度低的个体中,钙补充剂与骨密度呈显著负相关(rt = - 0.279, P = 0.041)。可乐摄入量与低骨密度之间存在显著关联(p = 0.027),而饮茶与两组的风险无关。独创性/价值本研究提示骨质疏松与低骨量之间存在不同变量的直接关系。本研究旨在解决沙特阿拉伯Al-Ahsa省低骨密度和骨质疏松症妇女血液中维生素D和钙水平及其与骨密度关系研究的缺乏问题。
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引用次数: 0
Renewable energy development, unemployment and GDP growth: South Asian evidence 可再生能源发展、失业和GDP增长:南亚的证据
Q4 Business, Management and Accounting Pub Date : 2023-08-11 DOI: 10.1108/agjsr-04-2023-0152
Mohammad Rifat Rahman, Md. Mufidur Rahman, Roksana Akter
PurposeThis study aims to investigate the interplay between renewable energy development, unemployment and GDP growth within Bangladesh, India, Pakistan and Sri Lanka. The research underscores the significant role of renewable energy plays in stimulating economic growth and mitigating unemployment, offering crucial policy insights for sustainable growth in South Asia.Design/methodology/approachUtilizing the autoregressive distributive lag (ARDL) framework and Toda Yamamoto causality through the vector autoregressive (VAR) approach, the study analyzes the long-term and short-term impacts of these variables from 1990 to 2019.FindingsThis study reveals a significant co-integration among renewable energy consumption, unemployment and GDP growth in selected South Asian countries. The long-term estimation shows renewable energy consumption influences negatively economic progression in Bangladesh, with no notable correlation with unemployment. In contrast, Sri Lanka demonstrates an optimal relationship among all the variables. Short-run assessments reveal a significant positive relationship between renewable energy consumption and economic growth in India, while an inverse relationship is evident in Pakistan. Moreover, the relationship between unemployment and economic progression, the result shows a negative and significant relationship in India and Sri Lanka.Research limitations/implicationsThe study emphasizes the need for policy development concerning renewable energy development, unemployment reduction and sustainable economic growth in South Asia. While limitations exist, future research can expand upon this work by incorporating varied data, additional countries or alternative modeling techniques.Originality/valueThis research offers a unique exploration into the multidimensional impacts of renewable energy consumption, unemployment and economic growth in the South Asian context, an area previously unexplored in such depth.
本研究旨在调查孟加拉国、印度、巴基斯坦和斯里兰卡的可再生能源发展、失业和GDP增长之间的相互作用。这项研究强调了可再生能源在刺激经济增长和缓解失业方面的重要作用,为南亚的可持续增长提供了重要的政策见解。设计/方法/方法利用自回归分布滞后(ARDL)框架和Toda Yamamoto因果关系,通过向量自回归(VAR)方法,分析了1990 - 2019年这些变量的长期和短期影响。研究结果本研究揭示了可再生能源消费、失业率和GDP增长之间显著的协整关系。长期估计表明,可再生能源消费对孟加拉国的经济发展产生负面影响,与失业率无显著相关性。相反,斯里兰卡表现出所有变量之间的最优关系。短期评估显示,印度的可再生能源消费与经济增长之间存在显著的正相关关系,而巴基斯坦的反向关系则很明显。此外,失业率与经济发展之间的关系,结果显示在印度和斯里兰卡呈负向和显著的关系。研究局限/意义本研究强调需要制定有关南亚可再生能源发展、减少失业和可持续经济增长的政策。虽然存在局限性,但未来的研究可以通过纳入不同的数据、其他国家或替代建模技术来扩展这项工作。原创性/价值本研究对南亚地区可再生能源消费、失业和经济增长的多维影响进行了独特的探索,这是一个以前从未深入探索过的领域。
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引用次数: 2
Black swan events and stock market behavior in Gulf countries: a comparative analysis of financial crisis (2008) and COVID-19 pandemic 海湾国家的黑天鹅事件与股市行为:金融危机(2008年)与COVID-19大流行的比较分析
Q4 Business, Management and Accounting Pub Date : 2023-08-08 DOI: 10.1108/agjsr-09-2022-0162
Mohd Ziaur Rehman, K. Karimullah
PurposeThe current study aims to examine the impact of two black swan events on the performance of six stock markets in Gulf Cooperation Council (GCC) economies (Abu Dhabi, Bahrain, Dubai, Oman, Qatar and Saudi Arabia). The two selected black swan events are the US Mortgage and credit crisis (Global Financial Crisis of 2008) and the COVID-19 pandemic.Design/methodology/approachThe performance of all the six stock markets are represented by their return and price volatility behavior, which has been measured by applying ARCH/GARCH model. The comparative analysis is done by employing mean difference models. The data is collected from Bloomberg on a daily frequency.FindingsThe response of two black swan events on the GCC stock markets has been heterogenous in nature. During the financial crisis, the impact was heavily felt on most of the stock markets in the GCC countries. It is revealed that the financial crisis had a negative significant impact on four of the six countries. Whereas during the COVID-19 crisis, it is revealed that there is no significant impact on four of the six selected stock markets. The positive significant impact is felt on two stock markets, namely, the Abu Dhabi stock market and the Saudi stock market.Originality/valueThe present investigation attempts to fill the gap in the literature on the intended topic because it is evident from the literature on the chosen subject that no study has been undertaken to evaluate and contrast the impact of the GFC crisis and COVID-19 on the GCC stock markets.
本研究旨在研究两个黑天鹅事件对海湾合作委员会(GCC)经济体(阿布扎比、巴林、迪拜、阿曼、卡塔尔和沙特阿拉伯)六个股票市场表现的影响。被选中的两个黑天鹅事件是美国抵押贷款和信贷危机(2008年全球金融危机)和COVID-19大流行。设计/方法/方法六个股票市场的表现由其收益和价格波动行为来表示,并采用ARCH/GARCH模型来衡量。采用均值差分模型进行对比分析。这些数据是从彭博社每天收集的。两个黑天鹅事件对海湾合作委员会股票市场的反应本质上是异质的。在金融危机期间,海湾合作委员会国家的大多数股票市场都受到了严重影响。结果显示,金融危机对六个国家中的四个国家产生了显著的负面影响。而在新冠肺炎危机期间,6个选定的股票市场中有4个没有受到显著影响。对阿布扎比股市和沙特股市均有显著的正向影响。原创性/价值本调查试图填补关于预期主题的文献空白,因为从所选主题的文献中可以明显看出,尚未进行任何研究来评估和对比全球金融危机和COVID-19对海湾合作委员会股票市场的影响。
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引用次数: 0
The influence of board size and board independence on triple bottom line reporting 董事会规模和董事会独立性对三重底线报告的影响
Q4 Business, Management and Accounting Pub Date : 2023-08-03 DOI: 10.1108/agjsr-02-2023-0061
A. Tajuddin, Shabiha Akter, Rasidah Mohd‐Rashid, W. Mehmood
PurposeThe purpose of this study is to examine the associations between board size, board independence and triple bottom line (TBL) reporting. The TBL report consists of three components, namely, environmental, social and economic indices.Design/methodology/approachThis study’s sample consists of top 50 listed companies from the year 2017 to 2019 on Tadawul Stock Exchange. Ordinary least squares, quantile least squares and robust least squares are used to investigate the associations between board characteristics and TBL reporting, including its separate components.FindingsThe authors find a significant negative association between TBL reporting and board independence. Social bottom line is significantly and negatively related to board size and board independence. Results indicate that board independence negatively influences the TBL disclosure of companies. Therefore, companies are encouraged to embrace TBL reporting. This suggests that businesses should improve the quality of their reporting while ensuring that voluntary disclosures reflect an accurate and fair view in order to preserve a positive relationship with stakeholders.Originality/valueThe present study explains the evidence for the determinants of the TBL in Saudi Arabia.
目的本研究的目的是检验董事会规模、董事会独立性和三重底线(TBL)报告之间的关系。TBL报告由三部分组成,即环境、社会和经济指数。本研究的样本包括Tadawul证券交易所2017年至2019年的前50家上市公司。使用普通最小二乘,分位数最小二乘和稳健最小二乘来调查董事会特征与TBL报告之间的关联,包括其单独的组成部分。研究结果作者发现TBL报告与董事会独立性之间存在显著的负相关。社会底线与董事会规模和董事会独立性呈显著负相关。结果表明,董事会独立性对公司TBL披露有负向影响。因此,鼓励公司采用TBL报告。这表明,企业应提高其报告的质量,同时确保自愿披露反映准确和公平的观点,以保持与利益相关者的积极关系。原创性/价值本研究解释了沙特阿拉伯TBL决定因素的证据。
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引用次数: 0
The impact of oil price and COVID-19 pandemic on clean energy stocks: an empirical approach using ARDL 油价和COVID-19大流行对清洁能源股的影响:基于ARDL的实证方法
Q4 Business, Management and Accounting Pub Date : 2023-07-31 DOI: 10.1108/agjsr-10-2022-0246
Hanan Naser, Fatima Al-aali, Yomna Abdulla, Rabab Ebrahim
PurposeOver the last decade, investments in green energy companies have witnessed noticeable growth rates. However, the glacial pace of the world economic restoration due to COVID-19 pandemic placed a high degree of uncertainty over this market. Therefore, this study investigates the short- and long-term relationships between COVID-19 new cases and WilderHill New Energy Global Innovation Index (NEX) using daily data over the period from January 23, 2020 to February 1, 2023.Design/methodology/approachThe authors utilize an autoregressive distributed lag bounds testing estimation technique.FindingsThe results show a significant positive impact of COVID-19 new cases on the returns of NEX index in the short run, whereas it has a significant negative impact in the long run. It is also found that the S&P Global Clean Energy Index has a significant positive impact on the returns of NEX index. Although oil has an influential effect on stock returns, the results show insignificant impact.Practical implicationsGovernments have the chance to flip this trend by including investment in green energy in their economic growth stimulation policies. Governments should highlight the fundamental advantages of investing in this type of energy such as creating job vacancies while reducing emissions and promoting innovation.Originality/valueFirst, as far as the authors are aware, the authors are the first to examine the effect of oil prices on clean energy stocks during COVID-19. Second, the authors contribute to studies on the relationship between oil prices and renewable energy. Third, the authors add to the emerging strand of literature on the impact of COVID-19 on various sectors of the economy. Fourth, the findings of the paper can add to the growing literature on sustainable development goals, in specific the papers related to energy sustainability.
在过去的十年中,对绿色能源公司的投资出现了显著的增长。然而,受新冠肺炎疫情影响,世界经济复苏缓慢,给这一市场带来了高度的不确定性。因此,本研究利用2020年1月23日至2023年2月1日期间的每日数据,研究了COVID-19新病例与WilderHill新能源全球创新指数(NEX)的短期和长期关系。设计/方法/方法作者利用自回归分布滞后边界测试估计技术。研究结果显示,新冠肺炎疫情对NEX指数收益率短期呈显著正影响,长期呈显著负影响。研究还发现,标普全球清洁能源指数对NEX指数的收益率具有显著的正向影响。虽然油价对股票收益有影响,但结果显示影响不显著。政府有机会通过将绿色能源投资纳入其刺激经济增长的政策来扭转这一趋势。政府应该强调投资这类能源的根本优势,比如在减少排放和促进创新的同时创造就业机会。首先,据作者所知,作者是第一个研究COVID-19期间油价对清洁能源股票影响的人。其次,作者对油价与可再生能源之间关系的研究做出了贡献。第三,作者补充了新出现的关于COVID-19对各个经济部门影响的文献。第四,本文的研究结果可以为越来越多的关于可持续发展目标的文献,特别是与能源可持续性相关的文献提供补充。
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引用次数: 0
Steady state modeling of autotrophic membrane bioreactor – a new approach to quantify biomass 自养膜生物反应器稳态建模——一种量化生物量的新方法
Q4 Business, Management and Accounting Pub Date : 2023-07-27 DOI: 10.1108/agjsr-02-2023-0044
A. Gasmi, M. Héran, N. Elboughdiri, L. Kolsi, D. Ghernaout, A. Hannachi, A. Grasmick
PurposeThe main purpose of this study resides essentially in the development of a new tool to quantify the biomass in the bioreactor operating under steady state conditions.Design/methodology/approachModeling is the most relevant tool for understanding the functioning of some complex processes such as biological wastewater treatment. A steady state model equation of activated sludge model 1 (ASM1) was developed, especially for autotrophic biomass (XBA) and for oxygen uptake rate (OUR). Furthermore, a respirometric measurement, under steady state and endogenous conditions, was used as a new tool for quantifying the viable biomass concentration in the bioreactor.FindingsThe developed steady state equations simplified the sensitivity analysis and allowed the autotrophic biomass (XBA) quantification. Indeed, the XBA concentration was approximately 212 mg COD/L and 454 mgCOD/L for SRT, equal to 20 and 40 d, respectively. Under the steady state condition, monitoring of endogenous OUR permitted biomass quantification in the bioreactor. Comparing XBA obtained by the steady state equation and respirometric tool indicated a percentage deviation of about 3 to 13%. Modeling bioreactor using GPS-X showed an excellent agreement between simulation and experimental measurements concerning the XBA evolution.Originality/valueThese results confirmed the importance of respirometric measurements as a simple and available tool for quantifying biomass.
本研究的主要目的在于开发一种新的工具来量化在稳态条件下运行的生物反应器中的生物量。设计/方法论/方法建模是理解一些复杂过程(如生物废水处理)的功能的最相关的工具。建立了活性污泥模型1 (ASM1)稳态模型方程,特别是自养生物量(XBA)和氧吸收率(OUR)。此外,在稳态和内源条件下,采用呼吸测量法作为定量生物反应器中活生物量浓度的新工具。结果建立的稳态方程简化了敏感性分析,使自养生物量(XBA)定量成为可能。实际上,SRT的XBA浓度约为212 mgCOD/L和454 mgCOD/L,分别等于20和40 d。在稳态条件下,监测内源OUR允许生物反应器中的生物量定量。通过比较稳态方程和呼吸计得到的XBA,结果表明,两者之间的误差约为3% ~ 13%。利用GPS-X对生物反应器进行建模,模拟结果与实验结果吻合良好。原创性/价值这些结果证实了呼吸测量作为量化生物量的一种简单而有效的工具的重要性。
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引用次数: 0
期刊
Arab Gulf Journal of Scientific Research
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