Distributed power control in cellular mobile radio systems with time-varying link gains

A simple distributed power control algorithm for communication systems with mobile users and unknown timevarying link gains is proposed. We prove that the proposed algorithm is exponentially converging. Furthermore, we show that the algorithm significantly outperforms the well-known
Foschini and Miljanic algorithm in the case of quickly moving mobile users.

Dispositional resistance to change : measurement equivalence and the link to personal values across 17 nations

The concept of dispositional resistance to change has been introduced in a series of exploratory and confirmatory analyses through which the validity of the Resistance to Change (RTC) Scale has been established (S. Oreg, 2003). However, the vast majority of participants with whom the scale was validated were from the United States. The purpose of the present work was to examine the meaningfulness of the construct and the validity of the scale across nations. Measurement equivalence analyses of data from 17 countries, representing 13 languages and 4 continents, confirmed the cross-national validity of the scale. Equivalent patterns of relationships between personal values and RTC across samples extend the nomological net of the construct and provide further evidence that dispositional resistance to change holds equivalent meanings across nations.

Can emotion-focused coping help explain the link between posttraumatic stress disorder severity and triggers for substance use in young adults

High rates of posttraumatic stress disorder (PTSD) have been reported among people seeking treatment for substance use disorders (SUDs), although few studies have examined the relationship between PTSD and substance use in young drug users. This study compared levels of substance use, coping styles, and high-risk triggers for substance use among 66 young adults with SUD, with or without comorbid PTSD. Young people with current SUD–PTSD (n = 36) reported significantly higher levels of substance use in negative situations, as well as emotion-focused coping, compared to the current SUD-only group (n = 30). Severity of PTSD was a significant predictor of negative situational drug use, and emotion-focused coping was found to mediate this relationship. The findings underscore the need for youth substance abuse treatment programs to include coping skills training and management of affect regulation for those individuals with comorbid SUD–PTSD.

Another look at the culture-quality-performance link

Quality improvement is usually driven by quality, safety and risk agendas leading to a focus on measurements of the outputs of care; outputs such as fewer complaints, fewer accidents and adverse events. An oft-neglected theme is the impact of the quality improvement initiative within the organisation itself. This paper presents the findings of the first stage of an evaluation that has examined the changes which have occurred within organisations since participating in a quality improvement initiative. These findings indicate that engaging with a quality improvement program can change the nature of social interactions within the organisation. In this way, quality improvement programs can impact on organisational culture, particularly in relation to organisational learning. Thus, this paper argues that successful engagement with a quality improvement program can enhance organisational learning, and, in turn, build organisational capacity.

Implementing a journal club in a palliative care setting : a link in the chain of evidence-based practice

This paper describes the implementation and evaluation of a journal club in a privately funded palliative care unit. Journal club meetings were initiated as part of a quality improvement process to foster the uptake of evidence-based practice. Nurses were presented with research articles each month and discussions were conducted focussing on methodological considerations of the research and implications of the research for patient care. The maximum number of attendees at any one meeting was nine and the minimum number was four. Overall, evaluations were positive about all aspects of the meetings. Attendees found that the selected articles were relevant, providing new information, stimulated discussion and reflection on clinical practice and encouraged further reading. One of the positive aspects of the meetings identified by participants was the facilitation style that enabled discussion in a safe and supportive environment. An important outcome of the meetings is the potential to explore evidence-based practices relevant to palliative care and to implement new practices or revise existing ones. As part of this process practice changes and clinical guidelines have been implemented. A dedicated facilitator with university links and a supportive organisational culture promoted club meetings as a practical way to provide clinical nurses with the opportunity to explore evidence-based research in the area of palliative care.

Delivering the link : using student feedback studies to improve student learning in dissertation studies

Student feedback is essential to enable lecturers to understand whether attempts to improve learning and education experience lead to improvement (George and Cowan, 1999; Gibbs, 1993). Current UK practice relies largely on end of module questionnaires to feedback levels of student satisfaction (Cowan, 2002), however there are inherent weaknesses in this approach; it seldom leads to change for that particular cohort; it relies on uncorroborated opinion, and finally, it may derive from superficial feedback from a minority of students with the remainder suffering from questionnaire fatigue.

This research project involved a cohort of final year building surveying students at Sheffield Hallam University, in England, who were undertaking a dissertation in two modules. During 2002/3 the use of Blackboard software had also been adopted by the module leader as an educational tool to support student learning in the module. The lecturer wanted to identify how students used Blackboard and what they thought about the most appropriate use of the medium. The research methodology sought to redress some of the issues identified above with student feedback, regarding timing of feedback, implementation of change during the teaching period and the lack of depth in the data. Using principles adopted by Angelo and Cross (1993), this research formatively evaluated student perceptions and levels of satisfaction with the dissertation module, the teaching materials, the workshops, the supervisory arrangements and relationships. This paper presents the findings of the research and illustrates the changes that were made during the year and the student’s views of these changes. The paper demonstrates how linking teaching with research has been delivered at Sheffield Hallam.

Culture, language, and patient safety : making the link

It has been well recognized internationally that hospitals are not as safe as they should be. In order to redress this situation, health care services around the world have turned their attention to strategically implementing robust patient safety and quality care programmes to identify circumstances that put patients at risk of harm and then acting to prevent or control those risks. Despite the progress that has been made in improving hospital safety in recent years, there is emerging evidence that patients of minority cultural and language backgrounds are disproportionately at risk of experiencing preventable adverse events while in hospital compared with mainstream patient groups. One reason for this is that patient safety programmes have tended to underestimate and understate the critical relationship that exists between culture, language, and the safety and quality of care of patients from minority racial, ethno-cultural, and language backgrounds. This article suggests that the failure to recognize the critical link between culture and language (of both the providers and recipients of health care) and patient safety stands as a ‘resident pathogen’ within the health care system that, if not addressed, unacceptably exposes patients from minority ethno-cultural and language backgrounds to preventable adverse events in hospital contexts. It is further suggested that in order to ensure that minority as well as majority patient interests in receiving safe and quality care are properly protected, the culture–language–patient-safety link needs to be formally recognized and the vulnerabilities of patients from minority cultural and language backgrounds explicitly identified and actively addressed in patient safety systems and processes.