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英国医学杂志中文版 1998年第3期1卷 107-108页

作者： Nigel Unwin George Alberti Terry Aspray Richard Edwards Jean-Claude Mbanya Eugene Sobngwi Ferdinand Mugusi seif rashid Philip Setel David Whiting 刘智 Newcastle upon Tyne UK c/o Department of MedicineUniversity of Newcastle Medical SchoolNewcastle NE2 4HH Yaounde c/o Department of Medicine University of Newcastle Medical SchoolNewcastle NE2 4HH Cameroon c/o Department of Medicine University of Newcastle Medical SchoolNewcastle NE2 4HH Dar es Salaam Tanzania c/o Department of MedicineUniversity of Newcastle Medical SchoolNewcastle NE2 4HH

世界银行的统计数字把坦桑尼亚列为世界最穷国家之一,然而,其商业中心达累斯萨拉姆却是世界上最为昂贵的城市之一,这是由于领取发达国家水平工资的外企职工助长了高消费。更具讽刺意义的是,在坦桑尼亚及其它众多发展中国家,净剩财富的... 详细信息

世界银行的统计数字把坦桑尼亚列为世界最穷国家之一,然而,其商业中心达累斯萨拉姆却是世界上最为昂贵的城市之一,这是由于领取发达国家水平工资的外企职工助长了高消费。更具讽刺意义的是,在坦桑尼亚及其它众多发展中国家,净剩财富的流向同殖民时期一样,仍是从穷人流向富人。

关键词：经济全球化国家债务统计数字商业中心公共卫生基本卫生服务卫生工作者间接死亡卫生保健阿鲁沙

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Levels and Distribution of Polycyclic Aromatic Hydrocarbons (PAHs) in Marine Sediments of Eastern Bank Wesha Peninsular, Pemba Island, Tanzania

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Journal of Environmental Protection 2023年第7期14卷 493-506页

作者： Hassan rashid Ali seif Hamad Khalfan Haji Mwevura Haji Said Suleiman Bakari School of Natural and Social Sciences The State University of Zanzibar Zanzibar Tanzania Tropical Research Centre for Oceanography Environment and Natural Resources The State University of Zanzibar Zanzibar Tanzania

Levels of Polycyclic aromatic hydrocarbons (PAHs) from sediments collected in July 2017, a week after tanks oil leak in the bay of Wesha Peninsular, Pemba Island are reported. Four sampling points were chosen alongside the mangroves where a total of twenty samples were collected during the low tides. Eight PAHs were detected with concentrations ranging from ND to 53.42 ng/g (dw). Total PAHs in sediments was 158.38 ng⋅g-1. Phenanthrene residues (lower molecular weight) were dominant followed by pyrene (higher molecular weight PAHs) accounting for 90% and 40% detection frequencies, respectively. Statistical analysis showed no significant difference in the concentrations of PAHs among sites (p < 0.05, ANOVA). Vertical distribution of PAHs shows no definite patterns with sediment depth, however, composition patterns of PAHs along sediment depth indicate that higher molecular weight PAHs tend to remain in middle layer (2 - 4 cm). The results advocate the needs of proper monitoring to avoid the possible consequences to the public health.

关键词： PAHs POPs Sediments Marine Pollution Wesha

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The Influence of Climate Change and Variability on Aircraft Take-off and Landing Performance;a Case Study of the Abeid Amani Karume International Airport-Zanzibar

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Journal of Transportation Technologies 2022年第3期12卷 453-474页

作者： Omar Mohamed Haji Kombo Hamad Kai Sara Abdalla Khamis Said Suleiman Bakar Hassan rashid Ali Gharib Hamza Mohamed Fatma Said seif Tanzania Civil Aviation Authority Zanzibar Office Kisauni Zanzibar Tanzania Meteorological Authority Zanzibar Office Kisauni Zanzibar State University of Zanzibar Tunguu Zanzibar

Climate change (CC) and variability have been world widely reported to pose number of risks in aviation industry including accidents, astray, and other operational difficulties. The impact of weather on landing and take-off performances has been several times experienced at Abeid Amani Karume International Airport (AAKIA);however, the influence of climate change and variability to the aircraft performance needs to be assessed. Thus, this study investigated the influence of climate change and variability on aircrafts take-off and landing performances. Specifically, the study investigated;i) the influence of climate change on Take-off Distance Required (TODR) and Maximum Take-off Mass (MTOM) for different types of aircraft;ii) the influence of climate variability to the aircraft landing performance on light, medium and heavy aircraft and lastly, iii) the study investigated the seasonal and annual variability on aircraft landing performance due to climate variability. The datasets used in this study include the eight years (2014-2021), aircraft operational records (diversion and missed approach events) and Aviation Routine Weather Reports (METAR) records which were utilized as the indicators for landing performance, the long-term (1990-2020) annual maximum temperatures (Tmax) which was used to determine the TODR and MTOM. Statistical tools including mean, percentage changes, correlations, regression, and the chi-square test were used for analysis and hypotheses testing. The results revealed that light and medium aircraft categories were significantly most affected on diversion events as compared to the heavy categories;however, for the missed approach events the impact was vice versa. Moreover, the seasonal and annual variability on diversion and missed approach events were significantly different (at p ≤ 0.001). As for the take-off performance, results show that the TODR and MTOM were significantly increasing and decreasing (at p ≤ 0.001), based on increasing air temp

关键词： Aircraft Take off/Landing Performance Missed Approach Diversion Take off Distance Required Maximum Take-off Mass Diversion Missed Approach

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Levels and Distribution of Polycyclic Aromatic Hydrocarbons (PAHs) in Marine Sediments of Eastern Bank Wesha Peninsular, Pemba Island, Tanzania

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Journal of Environmental Protection（环境保护） 2023年第7期

作者： Hassan rashid Ali seif Hamad Khalfan Haji Mwevura Haji Said Suleiman Bakari

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