Evaluation of methods for characterizing the fine particulate matter emissions from aircraft and other diffusion flame combustion aerosol sources.

The U. S. Environmental Protection Agency in collaboration with the U. S. Air Force Arnold Engineering Development Complex conducted the VAriable Response In Aircraft nvPM Testing (VARIAnT) 3 and 4 test campaigns to compare nonvolatile particulate matter (nvPM) emissions measurements from a variety of diffusion flame combustion aerosol sources (DFCASs), including a Cummins diesel engine, a diesel powered generator, two gas turbine start carts, a J85-GE-5 turbojet engine burning multiple fuels, and a Mini-CAST soot generator. The VARIAnT research program was devised to understand reported variability in the ARP6320A sampling system nvPM measurements. The VARIAnT research program has conducted four test campaigns to date with the VARIAnT 3 and 4 campaigns devoted to: (1) assessing the response of three different black carbon mass analyzers to particles of different size, morphology, and chemical composition; (2) characterizing the particles generated by 6 different combustion sources according to morphology, effective density, and chemical composition; and (3) assessing any significant difference between black carbon as determined by the 3 mass analyzers and the total PM determined via other techniques. Results from VARIAnT 3 and 4 campaigns revealed agreement of about 20% between the Micro-Soot Sensor, the Cavity Attenuated Phase Shift (CAPS PMSSA) monitor and the thermal-optical reference method for elemental carbon (EC) mass, independent of the calibration source used. For the LII-300, the measured mass concentrations in VARIAnT 3 fall within 18% and in VARIAnT 4 fall within 27% of the reference EC mass concentration when calibrated on a combustor rig in VARIAnT 3 and on an LGT-60 start cart in VARIAnT 4, respectively. It was also found that the three mass instrument types (MSS, CAPS PMSSA, and LII-300) can exhibit different BC to reference EC ratios depending on the emission source that appear to correlate to particle geometric mean mobility diameter, morphology, or some other parameter associated with particle geometric mean diameter (GMD) with the LII-300 showing a slightly stronger apparent trend with GMD. Systematic differences in LII-300 measured mass concentrations have been reduced by calibrating with a turbine combustion as a particle source (combustor or turbine engine). With respect to the particle size measurements, the sizing instruments (TSI SMPS, TSI EEPS, and Cambustion DMS 500) were found to be in general agreement in terms of size distributions and concentrations with some exceptions. Gravimetric measurements of the total aerosol mass produced by the various DFCAs differed from the reference EC, BC and integrated particle size distribution measured aerosol masses. The measurements of particle size distributions and single particle analysis performed using the miniSPLAT indicated the presence of larger particles (≳150 nm) having more compact morphologies, higher effective density, and a composition dominated by OC and containing ash. This increased large particle fraction is also associated with higher values of single scattering albedo measured by the CAPS PMSSA instrument and higher OC measurements. These measurements indicate gas turbine engine emissions can be a more heterogeneous mix of particle types beyond the original E-31 assumption that engine exit exhaust particles are mainly composed of black carbon.

Exploring the Use of an Electronic Competency Assessment Document Using iPad Minis to Assess Clinical Practice Competency in a Preregistration Nursing Program: A Cross-sectional Feasibility Study.

The aim of this study was to explore the feasibility of using iPad minis as a method of completing competency assessment in clinical practice. Digital technology helps to revolutionize all aspects of our lives. The use of digital technologies in clinical practice can facilitate a move toward a more flexible learning environment and enable students to adapt in a rapidly changing, interconnected world. The introduction of electronic clinical booklets in practice placements could facilitate the sharing of clinical information through connected healthcare systems, thus improving the student experience. A cross-sectional design was used in this study. A sample of BSc nursing students (n = 53) and clinically based healthcare professionals (n = 27) (preceptors and clinical placement coordinators) participated in this study. Data were collected using a modified version of Garrett and colleagues' instrument, the System Usability Scale, a demographics questionnaire, and three open-ended questions. There was a significant difference between the students and preceptors/clinical placement coordinators across all items with higher proportions of students (ranging from 66% to 75.5%), indicating that they agreed or strongly agreed with the reliability, ease of use, and effectiveness of the device in assessing their clinical competency (ranging from 11.1% to 40.7%). In addition, the iPad minis were found to be smaller, lighter, and easier to carry than paper-based booklets and encouraged students to access timely online learning resources during placement to help augment their learning. The use of iPad mini to complete the electronic competency assessment document as a replacement for a paper-based system to assess clinical practice is feasible. The introduction of electronic assessment documents should incorporate a robust training plan and standard operating procedures.

Bedside handover at the change of nursing shift: A mixed-methods study.

AIM: To describe the structures, processes and content of bedside handover at the change of nursing shift in an acute-care context. BACKGROUND: The handover of patient information and care at the change of nursing shift is an essential, albeit risk-laden, time-consuming activity in clinical practice. DESIGN: A convergent parallel mixed-methods design was used. METHODS: Thirty episodes of bedside handover were concurrently audio-recorded and observed using a researcher-developed tool modelled on the five domains of the British Medical Association's Safe Handover-Safe Patients framework. The audio recordings were analysed using content analysis. Quantitative and qualitative data generated were then triangulated to develop a more complete interpretation of the structure, process and content of information transferred at the patient's bedside during the change of nursing shift. This study followed Good Reporting of Mixed Methods Study guidelines. RESULTS: Bedside handover was observed to be mainly conducted at a fast pace. However, within these timeframe large volumes of complex information were shared and important nurse-patient interactions occurred. Analysis of the audio recordings provided evidence that the dialogue during handover was nurse-dominated and the outgoing nurse appeared to influence the degree of patient participation. CONCLUSION: Bedside handover at the change of nursing shift involves three key stakeholders: outgoing nurse, incoming nurse and the patient. A combination of intricate communication skills both verbal and nonverbal facilitates the rapid sharing of large volumes of complex information which is necessary for the continuity and safety of patient care across nursing shifts. RELEVANCE TO CLINICAL PRACTICE: The comprehensive description of the complexities of bedside handover in this study provides an insight into this frequently occurring, important nursing practice and can be used to support nurse education and practice development.

The factors to be considered when evaluating bedside handover.

AIM: This paper sought to identify the factors that should be considered in the study of bedside handover at the change of nursing shift. BACKGROUND: The introduction of bedside handover at the change of nursing shift has been linked to increased patient safety; bedside handover is not a simple change of location but a fundamental change in nursing practice. METHOD: An integrative review of the literature was performed, to identify factors that should be considered when exploring and describing the process and content of nursing handover when performed at the patient bedside. RESULTS: Nursing handover conducted at the patient's bedside is different to other forms of clinical handover in that the patient is part of the process. A dedicated tool is required to comprehensively study and understand the complexities of the bedside handover at the change of nursing shift. CONCLUSION: The factors identified in this literature review should be used to develop a tool to study the phenomenon that is nursing bedside handover. IMPLICATIONS FOR NURSING MANAGEMENT: Handover at the change of nursing shift is a high risk, high volume nursing practice, therefore the introduction of bedside handover should be systematically studied.

The effect of adult Early Warning Systems education on nurses' knowledge, confidence and clinical performance: A systematic review.

AIMS: This review aims to determine the effect of adult Early Warning Systems education on nurses' knowledge, confidence and clinical performance. BACKGROUND: Early Warning Systems support timely identification of clinical deterioration and prevention of avoidable deaths. Several educational programmes have been designed to help nurses recognize and manage deteriorating patients. Little is known as to the effectiveness of these programmes. DESIGN: Systematic review. DATA SOURCES: Academic Search Complete, CINAHL, MEDLINE, PsycINFO, PsycARTICLES, Psychology and Behavioral Science Collection, SocINDEX and the UK & Ireland Reference Centre, EMBASE, the Turning Research Into Practice database, the Cochrane Central Register of Controlled Trials (CENTRAL) and Grey Literature sources were searched between October and November 2015. REVIEW METHODS: This is a quantitative systematic review using Cochrane methods. Studies published between January 2011 - November 2015 in English were sought. The risk of bias, level of evidence and the quality of evidence per outcome were assessed. RESULTS: Eleven articles with 10 studies were included. Nine studies addressed clinical performance, four addressed knowledge and two addressed confidence. Knowledge, vital signs recording and Early Warning Score calculation were improved in the short term. Two interventions had no effect on nurses' response to clinical deterioration and use of communication tools. CONCLUSION: This review highlights the importance of measuring outcomes using standardized tools and valid and reliable instruments. Using longitudinal designs, researchers are encouraged to investigate the effect of Early Warning Systems educational programmes. These can include interactive e-learning, on-site interdisciplinary Early Warning Scoring systems training sessions and simulated scenarios.

A new era for emergency care services in Ireland.

The National Emergency Medicine Programme Strategy is a comprehensive plan to improve and develop emergency care in Ireland. It recommends significant changes in how emergency care is organised and delivered so that patients can be confident that they will receive high quality, safe and timely care. Emergency nurses were involved in developing aspects of the strategy document and will play a crucial role in its implementation to ensure that patient outcomes and satisfaction with emergency care services in Ireland are improved.

Impact of Biofuel Blends on Black Carbon Emissions from a Gas Turbine Engine.

Presented here is an overview of non-volatile particulate matter (nvPM) emissions, i.e. "soot" as assessed by TEM analyses of samples collected after the exhaust of a J-85 turbojet fueled with Jet-A as well as with blends of Jet-A and Camelina biofuel. A unifying explanation is provided to illustrate the combustion dynamics of biofuel and Jet-A fuel. The variation of primary particle size, aggregate size and nanostructure are analyzed as a function of biofuel blend across a range of engine thrust levels. The postulate is based on where fuels start along the soot formation pathway. Increasing biofuel content lowers aromatic concentration while placing increasing dependence upon fuel pyrolysis reactions to form the requisite concentration of aromatics for particle inception and growth. The required "kinetic" time for pyrolysis reactions to produce benzene and multi-ring PAHs allows increased fuel-air mixing by turbulence, diluting the fuel-rich soot-forming regions, effectively lowering their equivalence ratio. With a lower precursor concentration, particle inception is slowed, the resulting concentration of primary particles is lowered and smaller aggregates were measured. The lower equivalence ratio also results in smaller primary particles because of the lower concentration of growth species.