Hong Kong Polytechnic University

About: Hong Kong Polytechnic University is a education organization based out in Hong Kong, China. It is known for research contribution in the topics: Computer science & Tourism. The organization has 29633 authors who have published 72136 publications receiving 1956312 citations. The organization is also known as: HKPU & PolyU.

Community Integration or Community Exposure? A Review and Discussion in Relation to People with an Intellectual Disability

Abstract: Background : This paper reviews the issue of integration as it applies to people with an intellectual disability. A compelling finding is the almost exclusive orientation of the literature to physical integration within the general community of non-disabled people. Moreover, it seems to be generally assumed that the more frequently people experience such integration the better their lives will be. Methods : We question the validity of this assumption on several grounds. It is social, not physical integration, that has a reliable positive influence on well-being. This is an important conclusion as some disabled people find effective social integration with the general community extremely difficult to achieve. Because of this, the consequences of an overly enthusiastic program of integration for such people has more potential to be more stressful than beneficial. Results : We further argue that, as integration is being pursued to benefit the individual, the essential goal of service provision should be to achieve a sense of community connectedness, rather than being concerned with physical integration within the general community. Conclusion : It is proposed that such connectedness is more likely to be achieved within the community of people with an intellectual disability.

Effective Carrier-Concentration Tuning of SnO 2 Quantum Dot Electron-Selective Layers for High-Performance Planar Perovskite Solar Cells.

Abstract: The carrier concentration of the electron-selective layer (ESL) and hole-selective layer can significantly affect the performance of organic-inorganic lead halide perovskite solar cells (PSCs). Herein, a facile yet effective two-step method, i.e., room-temperature colloidal synthesis and low-temperature removal of additive (thiourea), to control the carrier concentration of SnO2 quantum dot (QD) ESLs to achieve high-performance PSCs is developed. By optimizing the electron density of SnO2 QD ESLs, a champion stabilized power output of 20.32% for the planar PSCs using triple cation perovskite absorber and 19.73% for those using CH3 NH3 PbI3 absorber is achieved. The superior uniformity of low-temperature processed SnO2 QD ESLs also enables the fabrication of ≈19% efficiency PSCs with an aperture area of 1.0 cm2 and 16.97% efficiency flexible device. The results demonstrate the promise of carrier-concentration-controlled SnO2 QD ESLs for fabricating stable, efficient, reproducible, large-scale, and flexible planar PSCs.

Engaging the YouTube Google-Eyed Generation: Strategies for Using Web 2.0 in Teaching and Learning.

Abstract: YouTube, Podcasting, Blogs, Wikis and RSS are buzz words currently associated with the term Web 2.0 and represent a shifting pedagogical paradigm for the use of a new set of tools within education. The implication here is a possible shift from the basic archetypical vehicles used for (e)learning today (lecture notes, printed material, PowerPoint, websites, animation) towards a ubiquitous user‑centric, user‑content generated and user‑ guided experience. It is not sufficient to use online learning and teaching technologies simply for the delivery of content to students. A new "Learning Ecology" is present where these Web 2.0 technologies can be explored for collaborative and (co)creative purposes as well as for the critical assessment, evaluation and personalization of information. Web 2.0 technologies provide educators with many possibilities for engaging students in desirable practices such as collaborative content creation, peer assessment and motivation of students through innovative use of media. These can be used in the development of authentic learning tasks and enhance the learning experience. However in order for a new learning tool, be it print, multimedia, blog, podcast or video, to be adopted, educators must be able to conceptualize the possibilities for use within a concrete framework. This paper outlines some possible strategies for educators to incorporate the use of some of these Web 2.0 technologies into the student learning experience.

Sustainable construction aspects of using prefabrication in dense urban environment: a Hong Kong case study

Abstract: The construction industry in Hong Kong heavily relies on conventional cast in‐situ construction involving extensive use of timber formworks and wet trades. In 2001, the Construction Industry Review Committee (CIRC) report described the construction activities in Hong Kong as ‘labour intensive, dangerous and polluting’, in which ‘built products are rarely defect‐free’. Globally, however, the recent trend is prefabrication, which is being increasingly used in the building industry, alleviating some of the environmental burdens associated with conventional construction. The sustainable construction aspects of adopting prefabrication in high‐rise buildings are examined, and the economic, environmental and social aspects of using prefabrication are assessed. A questionnaire survey was administered to experienced professionals and case studies of seven recent residential and non‐residential buildings in Hong Kong were conducted. The findings revealed that environmental, economic and social benefits of using pre...

RippleNet: Propagating User Preferences on the Knowledge Graph for Recommender Systems

Abstract: To address the sparsity and cold start problem of collaborative filtering, researchers usually make use of side information, such as social networks or item attributes, to improve recommendation performance. This paper considers the knowledge graph as the source of side information. To address the limitations of existing embedding-based and path-based methods for knowledge-graph-aware recommendation, we propose Ripple Network, an end-to-end framework that naturally incorporates the knowledge graph into recommender systems. Similar to actual ripples propagating on the surface of water, Ripple Network stimulates the propagation of user preferences over the set of knowledge entities by automatically and iteratively extending a user's potential interests along links in the knowledge graph. The multiple "ripples" activated by a user's historically clicked items are thus superposed to form the preference distribution of the user with respect to a candidate item, which could be used for predicting the final clicking probability. Through extensive experiments on real-world datasets, we demonstrate that Ripple Network achieves substantial gains in a variety of scenarios, including movie, book and news recommendation, over several state-of-the-art baselines.