Knowledge Based Systems: A Critical Survey of Major Concepts, Issues, and Techniques

This Working Paper Series entry presents a detailed survey of knowledge based systems. After being in a relatively dormant state for many years, only recently is Artificial Intelligence (AI) - that branch of computer science that attempts to have machines emulate intelligent behavior - accomplishing practical results. Most of these results can be attributed to the design and use of Knowledge-Based Systems, KBSs (or ecpert systems) - problem solving computer programs that can reach a level of performance comparable to that of a human expert in some specialized problem domain. These systems can act as a consultant for various requirements like medical diagnosis, military threat analysis, project risk assessment, etc. These systems possess knowledge to enable them to make intelligent desisions. They are, however, not meant to replace the human specialists in any particular domain. A critical survey of recent work in interactive KBSs is reported. A case study (MYCIN) of a KBS, a list of existing KBSs, and an introduction to the Japanese Fifth Generation Computer Project are provided as appendices. Finally, an extensive set of KBS-related references is provided at the end of the report

Decentralised Clinical Guidelines Modelling with Lightweight Coordination Calculus

Background: Clinical protocols and guidelines have been considered as a major means to ensure that cost-effective services are provided at the point of care. Recently, the computerisation of clinical guidelines has attracted extensive research interest. Many languages and frameworks have been developed. Thus far, however,an enactment mechanism to facilitate decentralised guideline execution has been a largely neglected line of research. It is our contention that decentralisation is essential to maintain a high-performance system in pervasive health care scenarios. In this paper, we propose the use of Lightweight Coordination Calculus (LCC) as a feasible solution. LCC is a light-weight and executable process calculus that has been used successfully in multi-agent systems, peer-to-peer (p2p) computer networks, etc. In light of an envisaged pervasive health care scenario, LCC, which represents clinical protocols and guidelines as message-based interaction models, allows information exchange among software agents distributed across different departments and/or hospitals. Results: We outlined the syntax and semantics of LCC; proposed a list of refined criteria against which the appropriateness of candidate clinical guideline modelling languages are evaluated; and presented two LCC interaction models of real life clinical guidelines. Conclusions: We demonstrated that LCC is particularly useful in modelling clinical guidelines. It specifies the exact partition of a workflow of events or tasks that should be observed by multiple "players" as well as the interactions among these "players". LCC presents the strength of both process calculi and Horn clauses pair of which can provide a close resemblance of logic programming and the flexibility of practical implementation

Consumption of management publications, The

This paper focuses on the consumption phase of the process of Production-Diffusion-Consumption of management knowledge. We argue that consumers play an important role in that process, one we feel has been overlooked in most of the existing literature. The first part of the paper is mostly theoretical. In it we first situate our contribution within the existing literature on management knowledge, and then approach the issue of the selection of knowledge sources by knowledge consumers. We sustain that manager-consumers have a strong impact on the success or failure of management ideas (selection), and also shape their content. The second part of the paper is mostly empirical. It consists of an analysis of a questionnaire that is intended to help us gain a better understanding of knowledge consumers' behaviour. Finally, we offer our conclusions.Management knowledge; knowledge consumers

Identifying Web Tables - Supporting a Neglected Type of Content on the Web

The abundance of the data in the Internet facilitates the improvement of extraction and processing tools. The trend in the open data publishing encourages the adoption of structured formats like CSV and RDF. However, there is still a plethora of unstructured data on the Web which we assume contain semantics. For this reason, we propose an approach to derive semantics from web tables which are still the most popular publishing tool on the Web. The paper also discusses methods and services of unstructured data extraction and processing as well as machine learning techniques to enhance such a workflow. The eventual result is a framework to process, publish and visualize linked open data. The software enables tables extraction from various open data sources in the HTML format and an automatic export to the RDF format making the data linked. The paper also gives the evaluation of machine learning techniques in conjunction with string similarity functions to be applied in a tables recognition task.Comment: 9 pages, 4 figure

Conscientious objection – does it also apply to nursing students?

The conscientious clause in nursing can be defined as a kind of special ethical and legal regulation which gives nurses right to object to actively perform certain medical procedures which are against their personal system of values. Usually these values are associated with nurses’ religious beliefs, but not always. Scope of this regulation differs throughout the world. However, it is emphasized that right to the conscientious objection is not absolute and this regulation can not be used in cases of danger to life or serious damage to the health of the patient. Medical procedures to which nurses hold conscientious objection are often within reproductive health services. However, we can also find reports on the use of this right i.e. in end-of-life care and in the process of the implementation of medical experiments. The main issue underlined in the discussion regarding practising conscientious objection in the clinical setting is the collision of two human rights: the right to conscientious objection of medical personnel and the right of patients to specific medical procedures which are legal in their country. If a procedure is legally available in a country it means that patients can expect to receive it, on the other hand, all citizens, including health care workers, have the right to protect their moral identity and the right to object to the implementation of a procedure to which they have a specific objection. It is very difficult to find good ethical and legal balance between these two perspectives

Academic careers: the value of individual mentorship on research career progression

The paper discusses how individual mentoring may impact positively on career pathway development for potential and future clinical academic researchers in nursing and allied health professions. Methods: The paper draws on a number of data sources and methodologies in order to fulfil the aims. Firstly, international literature provides an insight into mentoring processes and impact on career development. This is followed by a review of the mentoring experiences based on a UK study on the professorial populations in nursing and allied health professions. The final section reports on results of interviews with early and advanced researchers on their experiences of mentoring. Results: Individual mentoring is valued highly by health care professionals at all stages of career development. It is considered particularly useful when people are in transition towards a more challenging career role.Individuals in receipt of mentoring both formal and informal, report improved confidence in their cability to achieve their career goals. Mentees report improved levels of competence achieved through knowledge aquisition, networking and ability to probelm solve. Conclusions/Summary: Mentoring is considered an important process for health care professionals at all stages of their career. Opportunities to access and receive mentoring support for health care staff in the UK remain limited and sporadic in nature. There are examples of excellent mentoring schemes in place within some institutons and organisations but a national strategy to support mentoring has yet to be developed Key words: Clinical academic careers, mentoring, nursing, allied health profession

Relational Approach to Knowledge Engineering for POMDP-based Assistance Systems as a Translation of a Psychological Model

Assistive systems for persons with cognitive disabilities (e.g. dementia) are difficult to build due to the wide range of different approaches people can take to accomplishing the same task, and the significant uncertainties that arise from both the unpredictability of client's behaviours and from noise in sensor readings. Partially observable Markov decision process (POMDP) models have been used successfully as the reasoning engine behind such assistive systems for small multi-step tasks such as hand washing. POMDP models are a powerful, yet flexible framework for modelling assistance that can deal with uncertainty and utility. Unfortunately, POMDPs usually require a very labour intensive, manual procedure for their definition and construction. Our previous work has described a knowledge driven method for automatically generating POMDP activity recognition and context sensitive prompting systems for complex tasks. We call the resulting POMDP a SNAP (SyNdetic Assistance Process). The spreadsheet-like result of the analysis does not correspond to the POMDP model directly and the translation to a formal POMDP representation is required. To date, this translation had to be performed manually by a trained POMDP expert. In this paper, we formalise and automate this translation process using a probabilistic relational model (PRM) encoded in a relational database. We demonstrate the method by eliciting three assistance tasks from non-experts. We validate the resulting POMDP models using case-based simulations to show that they are reasonable for the domains. We also show a complete case study of a designer specifying one database, including an evaluation in a real-life experiment with a human actor