The search interface is made of three sections: Search, Explore, and Results. These are described in detail below.
You may start searching either from the Search section or from the Explore section.
Search
This section shows your current search criteria and allows you to submit keywords to search in the bibliography.
Each new submission adds the entered keywords to the list of search criteria.
To start a new search instead of adding keywords to the current search, use the Reset search button, then enter your new keywords.
To replace an already submitted keyword, first remove it by unchecking its checkbox, then submit a new keyword.
You may control the extent of your search by selecting where to search. The options are:
Everywhere: Search your keywords in all bibliographic record fields and in the text content of the available documents.
In authors or contributors: Search your keywords in author or contributor names.
In titles: Search your keywords in titles.
In all fields: Search your keywords in all bibliographic record fields.
In documents: Search your keywords in the text content of the available documents.
You may use boolean operators with your keywords. For instance:
AND: Finds entries that contain all specified terms. This is the default relation between terms when no operator is specified, e.g., a b is the same as a AND b.
OR: Finds entries that contain any of the specified terms, e.g., a OR b.
NOT: Excludes entries that contain the specified terms, e.g., NOT a.
Boolean operators must be entered in UPPERCASE.
You may use logical groupings (with parentheses) to eliminate ambiguities when using multiple boolean operators, e.g., (a OR b) AND c.
You may require exact sequences of words (with double quotes), e.g., "a b c". The default difference between word positions is 1, meaning that an entry will match if it contains the words next to each other, but a different maximum distance may be specified (with the tilde character), e.g., "web search"~2 allows up to 1 word between web and search, meaning it could match web site search as well as web search.
You may specify that some words are more important than others (with the caret), e.g., faceted^2 search browsing^0.5 specifies that faceted is twice as important as search when computing the relevance score of the results, while browsing is half as important. Such term boosting may be applied to a logical grouping, e.g., (a b)^3 c.
Keyword search is case-insentitive, accents are folded, and punctuation is ignored.
Stemming is performed on terms from most text fields, e.g., title, abstract, notes. Words are thus reduced to their root form, saving you from having to specify all variants of a word when searching, e.g., terms such as search, searches, and searching all produce the same results. Stemming is not applied to text in name fields, e.g., authors/contributors, publisher, publication.
Explore
This section allows you to explore categories associated with the references.
Categories can be used to filter your search. Check a category to add it to your search criteria and narrow your search. Your search results will then only show entries that are associated with that category.
Uncheck a category to remove it from your search criteria and broaden your search results.
The numbers shown next to the categories indicate how many entries are associated with each category in the current set of results. Those numbers will vary based on your search criteria to always describe the current set of results. Likewise, categories and whole facets will disappear when the result set has no entry associated to them.
An arrow icon () appearing next to a category indicates that subcategories are available. You may press it to expand a list of more specific categories. You may press it again later to collapse the list. Expanding or collapsing subcategories will not change your current search; this allows you to quickly explore a hierarchy of categories if desired.
Results
This section shows the search results. When no search criteria has been given, it shows the full content of the bibliography (up to 20 entries per page).
Each entry of the results list is a link to its full bibliographic record. From the bibliographic record view, you may continue exploring the search results by going to previous or following records in your search results, or you may return to the list of results.
Additional links, such as Read document or View on [website name], may appear under a result. These give you quick access to the resource. Those links will also be available in the full bibliographic record.
The Abstracts button lets you toggle the display of abstracts within the list of search results. Enabling abstracts, however, will have no effect on results for which no abstract is available.
Various options are provided to let you sort the search results. One of them is the Relevance option, which ranks the results from most relevant to least relevant. The score used for ranking takes into account word frequencies as well as the fields where they appear. For instance, if a search term occurs frequently in an entry or is one of very few terms used in that entry, that entry will probably rank higher than another where the search term occurs less frequently or where lots of other words also occur. Likewise, a search term will have more effect on the scores if it is rare in the whole bibliography than if it is very common. Also, if a search term appears in, e.g., the title of an entry, it will have more effect on the score of that entry than if it appeared in a less important field such as the abstract.
The Relevance sort is only available after keywords have been submitted using the Search section.
Categories selected in the Explore section have no effect on the relevance score. Their only effect is to filter the list of results.
This study examined the microbial contamination characteristics of three different roof materials (green roof, metal roof, and concrete roof) during rainfall events. Through runoff samples collected from multiple rainfall events in the experimental rainwater collection system model, the pollution characteristics of total colony-forming units, Escherichia coli, and total coliforms were analyzed in combination with water quality parameters such as pH, turbidity, chemical oxygen demand (COD), and electrical conductivity. The study using the Wilcoxon Signed Ranks Test and found that the microbial contamination load of initial rainwater was significantly higher than that of subsequent runoff. The Mann-Whitney U test was used to compare the differences in microbial contamination caused by different roof materials. The results show that the metal roof performed the best in terms of microbial control, while the green roof had the poorest microbial control efficiency. The Spearman correlation analysis revealed that turbidity and conductivity were significantly positively correlated with microbial contamination, confirming that pollutants and nutrient ions are core factors driving microbial proliferation. Moreover, the metal roof exhibited outstanding disinfection efficacy under direct sunlight (microbial survival rate 0.00003% - 0.0004%), its high reflectivity and thermal conductivity working in synergy with UV radiation to destroy microbial DNA, while under shaded conditions, the sterilization efficiency decreased by approximately 100 times. The study suggests that metal roofs should be prioritized for use in water quality-sensitive scenarios. Green roofs need to be equipped with initial rainwater retention and substrate antibacterial improvement, and concrete roofs can enhance their antibacterial ability through hydrophobic surface treatment.
The study provides a scientific basis for improving the design of rainwater collection systems in Macau, enriching the research cases of roof runoff pollution in tropical coastal cities, and is of great significance for improving the urban rainwater management system and protecting water environmental quality.
本研究考察了三种不同屋顶材料（绿色屋顶、金属屋顶和混凝土屋顶）在降雨期间的微生物污染特征。通过在实验雨水收集系统模型中多次降雨事件所采集的径流样本，结合 pH 值、浊度、化学需氧量（COD）和电导率等水质参数，对总菌落形成单位、大肠杆菌和总大肠菌群的污染特征进行了分析。研究采用威尔科克森符号秩检验，发现初期雨水的微生物污染负荷显著高于后续径流。采用曼 - 惠特尼 U 检验比较了不同屋顶材料造成的微生物污染差异。结果表明，金属屋顶在微生物控制方面表现最佳，而绿色屋顶的微生物控制效率最差。斯皮尔曼相关性分析表明，浊度和电导率与微生物污染显著正相关，这证实了污染物和营养离子是驱动微生物增殖的核心因素。此外，金属屋顶在阳光直射下表现出卓越的消毒效果（微生物存活率 0.00003% - 0.0004%），其高反射率和热导率与紫外线辐射协同作用，破坏微生物 DNA，而在遮阴条件下，其杀菌效率降低约 100 倍。该研究建议，在水质敏感的场景中应优先使用金属屋顶。绿色屋顶需要配备初期雨水截留装置和基质抗菌改进措施，而混凝土屋顶可通过疏水表面处理来增强其抗菌能力。该研究为澳门雨水收集系统的设计改进提供了科学依据，丰富了热带沿海城市屋顶径流污染的研究案例，对于完善城市雨水管理系统和保护水环境质量具有重要意义。