Static friction measurements on steel against uncoated and coated cast iron

Static friction is a phenomenon we may mainly consider as related to frictional joints within staticmechanics. The step from static friction to tribological phenomena is, however, rather short, since at theonset of sliding in a mechanical contact, the static friction determines the initial resistance against motion.Static friction furthermore plays a role in contacts subjected to traction and fretting. Although being aphenomenon of short duration, the tribological phenomena during the transition from static friction to slidingfriction may be of great importance for the operational life of the contact surfaces, particularly if theprocedure is repeated for a sufficient number of times.The present paper describes the principles of static friction measurements, details of the employed staticfriction tribometer and the results of measurements with unlubricated and lubricated sliding couplesconsisting of steel against uncoated and coated cast iron

Segregation, precipitation, and \alpha-\alpha' phase separation in Fe-Cr alloys: a multi-scale modelling approach

Segregation, precipitation, and phase separation in Fe-Cr systems is investigated. Monte Carlo simulations using semiempirical interatomic potential, first-principles total energy calculations, and experimental spectroscopy are used. In order to obtain a general picture of the relation of the atomic interactions and properties of Fe-Cr alloys in bulk, surface, and interface regions several complementary methods has to be used. Using Exact Muffin-Tin Orbitals method the effective chemical potential as a function of Cr content (0-15 at.% Cr) is calculated for a surface, second atomic layer and bulk. At ~10 at.% Cr in the alloy the reversal of the driving force of a Cr atom to occupy either bulk or surface sites is obtained. The Cr containing surfaces are expected when the Cr content exceeds ~10 at.%. The second atomic layer forms about 0.3 eV barrier for the migration of Cr atoms between bulk and surface atomic layer. To get information on Fe-Cr in larger scales we use semiempirical methods. Using combined Monte Carlo molecular dynamics simulations, based on semiempirical potential, the precipitation of Cr into isolated pockets in bulk Fe-Cr and the upper limit of the solubility of Cr into Fe layers in Fe/Cr layer system is studied. The theoretical predictions are tested using spectroscopic measurements. Hard X-ray photoelectron spectroscopy and Auger electron spectroscopy investigations were carried out to explore Cr segregation and precipitation in Fe/Cr double layer and Fe_0.95Cr_0.05 and Fe_0.85Cr_0.15 alloys. Initial oxidation of Fe-Cr was investigated experimentally at 10^-8 Torr pressure of the spectrometers showing intense Cr_2O_3 signal. Cr segregation and the formation of Cr rich precipitates were traced by analysing the experimental spectral intensities with respect to annealing time, Cr content, and kinetic energy of the exited electron.Comment: 16 pages, 14 figures, 52 reference

Empowering patient education on self-care activity among patients with colorectal cancer - a research protocol for a randomised trial

Background: Chemotherapy-induced side effects may have a negative effect on nutrition intake, thus increasing the risk of malnutrition and consequently, other serious complications for patients with cancer. The prevalence of malnutrition is common among patients with colorectal cancer. Nurse-led empowering education may have a positive effect on self-care activity in this patient group. Therefore, our purpose is to develop an empowering educational nursing intervention and test its effect on self-care activation and knowledge level among patients with colorectal cancer during chemotherapy. Secondary outcomes are quality of life and risk of malnutrition. Methods: An interdisciplinary expert group developed a face-to-face empowering educational intervention using teach-back method. A two-arm, single-centre, superiority trial with stratified randomisation (1:1) and pre-post measures will be used to assess the effect of the intervention compared to standard care. Patients (N = 40 + 40) will be recruited in one university hospital outpatient clinic in Finland. Eligibility criteria are adult patients diagnosed with colorectal cancer starting oral fluoropyrimidine or combination chemotherapy treatment. A registered nurse experienced in oncology will deliver the intervention 2 weeks after the first chemotherapy. Outcomes are measured before intervention (M0) and after a two-month follow-up period (M1). Discussion: This study will assess whether nurse-led empowering education using teach-back method is effective on self-care activity among patients with colorectal cancer. If the intervention has a positive effect, it may be implemented into patient education in a corresponding context.Peer reviewe

Investigating the construct and concurrent validity of the Richards-Campbell Sleep Questionnaire with intensive care unit patients and home sleepers

Background: Sleep is vital to our wellbeing. Critically ill patients are vulnerable with effects of sleep deprivation including weakened immune function, decreased glucose tolerance, and increased sympathetic activity. Intensive care unit (ICU) patients' sleep evaluation is difficult and often not reliable. The most commonly used instrument for assessing ICU patients' perspective of their sleep, Richards-Campbell Sleep Questionnaire (RCSQ), has not been reported to have undergone knowngroup construct validity testing or concurrent validity testing with the criterion measure of feeling refreshed. Objectives: The aim of the study was to explore the construct validity of the RCSQ with knowngroups technique and concurrent validity with the criterion measure of feeling refreshed on awakening. Methods: A cross-sectional descriptive survey study using the RCSQ was conducted on people sleeping at home (n = 114) over seven nights. The results were compared with the RCSQ sleep scores of nonintubated alert oriented adult ICU patients (n = 114). Home sleepers were also asked to rate how refreshed they felt on awakening. The study was executed and reported in accordance with the STROBE checklist for observational studies. Findings: RCSQ construct validity was supported because home sleepers' and ICU sleepers' sleep evaluations differed significantly. Home sleepers rated their sleep significantly better than ICU patients in all five sleep domains of the RCSQ. Concurrent validity was supported because the item "feeling refreshed on awakening" correlated strongly with all sleep domains. Conclusions: Sleep quality may be accurately measured using the RCSQ in alert people both in the ICU and at home. This study has added to the validity discussion around the RCSQ. The RCSQ can be used for sleep evaluation in ICUs to promote wellbeing and recovery. (c) 2021 Australian College of Critical Care Nurses Ltd. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).Peer reviewe

Effectiveness of nursing interventions among patients with cancer: An overview of systematic reviews

Aims and objectives To explore nursing interventions used among patients with cancer and summarise the results of their effectiveness. The ultimate goal was to improve the quality of care and provide best evidence for clinicians to refer to while developing effective nursing interventions. Background Nursing interventions refer to actions that nurses take with the aim of improving the well-being of people with cancer-related health and care needs. A plethora of systematic reviews has been conducted in this research area, although with scattered results. We conducted a comprehensive review to identify and summarise the existing evidence. Methods This overview of systematic reviews adheres to the PRISMA guidelines. The PubMed, CINAHL, MEDLINE and Scopus databases were searched. Nine reviews reporting findings from 112 original studies published 2007?2017 met the selection criteria. The results of intervention effectiveness were analysed using descriptive quantification and a narrative summary of the quantitative data. Results The effectiveness of educational nursing interventions was inconsistent on quality of life, attitudes, anxiety and distress, but positive on level of knowledge, symptom severity, sleep and uncertainty. Psychosocial nursing interventions had a significant effect on spiritual well-being, meaning of life, fatigue and sleep. Psychological nursing interventions reduced cancer-related fatigue. Nursing interventions supporting patients? coping had a significant impact on anxiety, distress, fatigue, sleep, dyspnoea and functional ability. Activity-based interventions may prevent cancer-related fatigue. Conclusions Nursing interventions achieved significant physical and psychological effects on the lives of patients with cancer. Multidimensional nature of interventions by combining different elements reinforces the effect. Priorities for future research include identifying the most beneficial components of these interventions. Relevance to Clinical Practice Implementation of these nursing interventions into clinical practice is important to improve patients? knowledge and quality of life (QoL) as well as reducing various symptoms and side effects related to cancer and its treatment. This article is protected by copyright. All rights reserved.</p

Critical care nurses' self-assessed patient observation skills: a cross-sectional survey study

BACKGROUND: Observing a patient's clinical condition is an important responsibility of critical care nurses and an essential component of their competence. Critical care nurses' patient observation skills contribute to patient safety and quality of care. These observation skills have not been assessed or measured previously.AIM: The aim of this study was to measure the self-assessed level of critical care nurses' patient observation skills and to explore the factors associated with these skills.STUDY DESIGN: This was a multicentre cross-sectional survey conducted in Finland.METHODS: The sample consisted of critical care nurses working at Finnish university hospitals. The data were collected between September 2017 and January 2018 using an instrument developed for the study - Patient Observation Skills in Critical Care Nursing (visual analogue scale 0-100). Descriptive and inferential statistics were used to analyse the data.RESULTS: A total of 372 critical care nurses (49%) responded. Finnish critical care nurses assessed their patient observation skills overall as excellent. The bio-physiological foundation was assessed as good, whereas skills in using observation methods and skills in recognizing changing clinical condition were assessed as excellent. Education for special tasks in intensive care units, information searching in scientific journals, working experience in critical care nursing and critical care nurses' perception of critical care as a preferred field of nursing were factors promoting patient observation skills.CONCLUSIONS AND RELEVANCE TO CLINICAL PRACTICE: The study provided a novel instrument for measuring critical care nurses' patient observation skills. The instrument may be used as an assessment tool in clinical practice and education. Developing orientation and on-the-job training in intensive care units are essential in assuring critical care nurses' adequate patient observation skills. Patient observation skills could be developed during nursing education by providing students with opportunities for clinical training and applying patient cases in virtual learning environments.</p

Newly graduated nurses' empowerment regarding professional competence and other work-related factors.

BACKGROUND Although both nurse empowerment and competence are fundamental concepts of describing newly graduated nurses' professional development and job satisfaction, only few studies exist on the relationship between these concepts. Therefore, the purpose of this study was to determine how newly graduated nurses assess their empowerment and to clarify professional competence compared to other work-related factors. METHODS A descriptive, cross-sectional and correlational design was applied. The sample comprised newly graduated nurses (n = 318) in Finland. Empowerment was measured using the 19-item Qualities of an Empowered Nurse scale and the Nurse Competence Scale measured nurses' self-assessed generic competence. In addition to demographic data, the background data included employment sector (public/private), job satisfaction, intent to change/leave job, work schedule (shifts/business hours) and assessments of the quality of care in the workplace. The data were analysed statistically by using Spearman's correlation coefficient as well as the One-Way and Multivariate Analysis of Variance. Cronbach's alpha coefficient was used to estimate the internal consistency. RESULTS Newly graduated nurses perceived their level of empowerment and competence fairly high. The association between nurse empowerment and professional competence was statistically significant. Other variables correlating positively to empowerment included employment sector, age, job satisfaction, intent to change job, work schedule, and satisfaction with the quality of care in the work unit. The study indicates competence had the strongest effect on newly graduated nurses' empowerment. CONCLUSIONS New graduates need support and career opportunities. In the future, nurses' further education and nurse managers' resources for supporting and empowering nurses should respond to the newly graduated nurses' requisites for attractive and meaningful work

Investigating the construct and concurrent validity of the Richards-Campbell Sleep Questionnaire with intensive care unit patients and home sleepers

BACKROUND: Sleep is vital to our wellbeing. Critically ill patients are vulnerable with effects of sleep deprivation including weakened immune function, decreased glucose tolerance, and increased sympathetic activity. Intensive care unit (ICU) patients' sleep evaluation is difficult and often not reliable. The most commonly used instrument for assessing ICU patients' perspective of their sleep, Richards-Campbell Sleep Questionnaire (RCSQ), has not been reported to have undergone known-group construct validity testing or concurrent validity testing with the criterion measure of feeling refreshed.OBJECTIVES: The aim of the study was to explore the construct validity of the RCSQ with known-groups technique and concurrent validity with the criterion measure of feeling refreshed on awakening.METHODS: A cross-sectional descriptive survey study using the RCSQ was conducted on people sleeping at home (n = 114) over seven nights. The results were compared with the RCSQ sleep scores of nonintubated alert oriented adult ICU patients (n = 114). Home sleepers were also asked to rate how refreshed they felt on awakening. The study was executed and reported in accordance with the STROBE checklist for observational studies.FINDINGS: RCSQ construct validity was supported because home sleepers' and ICU sleepers' sleep evaluations differed significantly. Home sleepers rated their sleep significantly better than ICU patients in all five sleep domains of the RCSQ. Concurrent validity was supported because the item "feeling refreshed on awakening" correlated strongly with all sleep domains.CONCLUSIONS: Sleep quality may be accurately measured using the RCSQ in alert people both in the ICU and at home. This study has added to the validity discussion around the RCSQ. The RCSQ can be used for sleep evaluation in ICUs to promote wellbeing and recovery.</div

The experiences of doctorally prepared nurses and doctoral nursing students with being mentored in the Nurse-Lead programme: A focus group study

AIM: to explore experiences of being mentored and the contribution of the mentoring to leadership and professional development of doctorally prepared nurses and doctoral nursing students participating in the Nurse-Lead programme. BACKGROUND: Mentoring is considered important for career development of academic nurses. Doctorally prepared nurses need a wide range of professional competences to develop sustainable careers. Therefore, they may benefit from a larger network of mentors, outside their own organization, to support their professional development. Therefore, a web-based leadership and mentoring programme was developed - the Nurse Lead programme. DESIGN: A descriptive study with semi-structured focus groups. METHOD: Three focus groups were conducted during an on-site programme meeting in 2019 with twenty-one doctorally prepared nurses and doctoral nursing students. The interview guide included questions about mentoring relationships and meaning of mentoring for leadership and professional development. The interviews were thematically analysed. RESULTS: Five themes were identified: "Preferred characteristics of mentors", "Developing trusting relationships", "Engagement of the mentors", "Becoming a proficient researcher and team leader" and "Becoming an empowered and confident professional". CONCLUSION: Mentoring supported the leadership and professional development of doctorally prepared nurses and doctoral nursing students. Participants were engaged in rewarding mentoring trajectories. The results indicate that a similar approach could be followed when developing mentoring programmes in the future

The experiences of doctorally prepared nurses and doctoral nursing students with being mentored in the Nurse-Lead programme : A focus group study

Funding Information: This work was supported by the financial support of Erasmus+ (project number 2017-1-IS01-KA203-026529 ). Erasmus+ had no role in the design of this study, the collection and interpretation of the data as well as writing of the report. Publisher Copyright: © 2023 The AuthorsAim: to explore experiences of being mentored and the contribution of the mentoring to leadership and professional development of doctorally prepared nurses and doctoral nursing students participating in the Nurse-Lead programme. Background: Mentoring is considered important for career development of academic nurses. Doctorally prepared nurses need a wide range of professional competences to develop sustainable careers. Therefore, they may benefit from a larger network of mentors, outside their own organization, to support their professional development. Therefore, a web-based leadership and mentoring programme was developed - the Nurse Lead programme. Design: A descriptive study with semi-structured focus groups. Method: Three focus groups were conducted during an on-site programme meeting in 2019 with twenty-one doctorally prepared nurses and doctoral nursing students. The interview guide included questions about mentoring relationships and meaning of mentoring for leadership and professional development. The interviews were thematically analysed. Results: Five themes were identified: “Preferred characteristics of mentors”, “Developing trusting relationships”, “Engagement of the mentors”, “Becoming a proficient researcher and team leader” and “Becoming an empowered and confident professional”. Conclusion: Mentoring supported the leadership and professional development of doctorally prepared nurses and doctoral nursing students. Participants were engaged in rewarding mentoring trajectories. The results indicate that a similar approach could be followed when developing mentoring programmes in the future.Peer reviewe