Impressions in Recommender Systems: Present and Future

Impressions are a novel data source providing researchers and practitioners with more details about user interactions and their context. In particular, an impression contain the items shown on screen to users, alongside users' interactions toward such items. In recent years, interest in impressions has thrived, and more papers use impressions in recommender systems. Despite this, the literature does not contain a comprehensive review of the current topics and future directions. This work summarizes impressions in recommender systems under three perspectives: recommendation models, datasets with impressions, and evaluation methodologies. Then, we propose several future directions with an emphasis on novel approaches. This work is part of an ongoing review of impressions in recommender systems

THE ROLE OF DEPUTY PRINCIPALS IN MANAGING CONFLICT AMONG SECONDARY SCHOOL TEACHERS IN THE LEJWELEPUTSWA DISTRICT, IN THE FREE STATE PROVINCE

Thesis (Phd. (Psychology of education )) - Central University of Technology, Free State, 2013This purpose of this study was to investigate the role of the deputy principals in managing conflict among secondary school teachers in the Lejweleputswa Education District, in the Free State Province. Two questionnaires, one for the deputy principals and one for teachers, were developed. The questionnaires were administered on six deputy principals and twelve teachers from six secondary schools in Monyakeng, Nyakallong and Kutloanong townships. The qualitative approach was mainly used for the collection and analysis of data. The study revealed that conflict was common in the surveyed township secondary schools. The study found thatthe causes of conflict for the township secondary school teachers included poor communication, shortage of resources and facilities, work overload, gossiping, high rates of absenteeism and poor performance of teachers. The study further revealed that the role of the deputy principals was crucial in the handling of conflict in schools. The conflict resolution strategies commonly applied by the deputy principals included negotiations, accommodating, collaborating and compromise. However, avoiding, arbitration and competing strategies were avoided by the deputy principals. The role of the deputy principals in resolving conflict was found to focus more on building relationships and collegiality among teachers in the township secondary schools. It was recommended that schools are provided with adequate resources and facilities, as well as adequate teachers; that counseling sessions to be introduced for teachers, and that training in stress and conflict management is also introduced for township secondary school teachers. A conflict resolution model appropriate for the township secondary schools was also developed

Implementation of interventions to reduce preventable hospital admissions for cardiovascular or respiratory conditions : an evidence map and realist synthesis

Background In 2012, a series of systematic reviews summarised the evidence regarding interventions to reduce preventable hospital admissions. Although intervention effects were dependent on context, the reviews revealed a consistent picture of reduction across different interventions targeting cardiovascular and respiratory conditions. The research reported here sought to provide an in-depth understanding of how interventions that have been shown to reduce admissions for these conditions may work, with a view to supporting their effective implementation in practice. Objectives To map the available evidence on interventions used in the UK NHS to reduce preventable admissions for cardiovascular and respiratory conditions and to conduct a realist synthesis of implementation evidence related to these interventions. Methods For the mapping review, six databases were searched for studies published between 2010 and October 2017. Studies were included if they were conducted in the UK, the USA, Canada, Australia or New Zealand; recruited adults with a cardiovascular or respiratory condition; and evaluated or described an intervention that could reduce preventable admissions or re-admissions. A descriptive summary of key characteristics of the included studies was produced. The studies included in the mapping review helped to inform the sampling frame for the subsequent realist synthesis. The wider evidence base was also engaged through supplementary searching. Data extraction forms were developed using appropriate frameworks (an implementation framework, an intervention template and a realist logic template). Following identification of initial programme theories (from the theoretical literature, empirical studies and insights from the patient and public involvement group), the review team extracted data into evidence tables. Programme theories were examined against the individual intervention types and collectively as a set. The resultant hypotheses functioned as synthesised statements around which an explanatory narrative referenced to the underpinning evidence base was developed. Additional searches for mid-range and overarching theories were carried out using Google Scholar (Google Inc., Mountain View, CA, USA). Results A total of 569 publications were included in the mapping review. The largest group originated from the USA. The included studies from the UK showed a similar distribution to that of the map as a whole, but there was evidence of some country-specific features, such as the prominence of studies of telehealth. In the realist synthesis, it was found that interventions with strong evidence of effectiveness overall had not necessarily demonstrated effectiveness in UK settings. This could be a barrier to using these interventions in the NHS. Facilitation of the implementation of interventions was often not reported or inadequately reported. Many of the interventions were diverse in the ways in which they were delivered. There was also considerable overlap in the content of interventions. The role of specialist nurses was highlighted in several studies. The five programme theories identified were supported to varying degrees by empirical literature, but all provided valuable insights. Limitations The research was conducted by a small team; time and resources limited the team’s ability to consult with a full range of stakeholders. Conclusions Overall, implementation appears to be favoured by support for self-management by patients and their families/carers, support for services that signpost patients to consider alternatives to seeing their general practitioner when appropriate, recognition of possible reasons why patients seek admission, support for health-care professionals to diagnose and refer patients appropriately and support for workforce roles that promote continuity of care and co-ordination between services. Future work Research should focus on understanding discrepancies between national and international evidence and the transferability of findings between different contexts; the design and evaluation of implementation strategies informed by theories about how the intervention being implemented might work; and qualitative research on decision-making around hospital referrals and admissions. Funding The National Institute for Health Research Health Services and Delivery Research programme

An evaluation of a profiling and selection process for apprentices in the South African automotive industry

The South African automotive industry is the biggest manufacturing sector and the largest contributor to the domestic economy. Within the national manufacturing sector, the artisan job family has been identified as a scarce and critical skill. Artisans are a number one area of concern with regard to filling vacancies in the country. The domestic economy as well as the effectiveness and success of the automotive industry could be negatively affected if this artisanal crisis is not adequately addressed. This study aimed to evaluate a profiling and selection process for apprentices in the South African automotive industry. A multiple-stage selection method was used to screen the applicants. The selection process included the following phases: application review, rating of the application documentation, aptitude testing, skills-based teamwork assessment and interviews. The researcher obtained access to the documentation generated through an annual apprentice selection process at a large multi-national automotive firm. The final sample consisted of 3 412 individuals that had applied for two types of apprenticeship programmes, namely, automotive electrician and millwright, across three intake years. Descriptive statistics such as frequency distribution tables and medians were used. Inferential statistical analysis, using survival analysis, was used to assess whether the survival curves were statistically different across the groups. The findings of this study are relevant to the South African automotive industry, as well as the manufacturing sector. The findings are also of value to human resource practitioners, educators, social scientists and other researchers. The 13 constructs investigated in the study showed a high association with longer survival time in the selection process. The positive evaluation of this selection process provides evidence to support its confirmation as the national selection tool. Four recommendations are proposed to the HRM field and four to the automotive industry. The multiple-hurdle selection process employed in this study should be replicated by the automotive industry in their selection of apprenticeship applicants. Standardisation practices, the use of on-line technology and the marketing of the apprenticeship position are also recommended. Furthermore, it is recommended that educational providers provide job preparation workshops to assist applicants to improve their survival opportunity within the selection processes