Evaluation of Peripheral Electrostimulation Thresholds in Human Model for Uniform Magnetic Field Exposure

The external field strength according to the international guidelines and standards for human protection are derived to prevent peripheral nerve system pain at frequencies from 300–750 Hz to 1 MHz. In this frequency range, the stimulation is attributable to axon electrostimulation. One limitation in the current international guidelines is the lack of respective stimulation thresholds in the brain and peripheral nervous system from in vivo human measurements over a wide frequency range. This study investigates peripheral stimulation thresholds using a multi-scale computation based on a human anatomical model for uniform exposure. The nerve parameters are first adjusted from the measured data to fit the peripheral nerve in the trunk. From the parameters, the external magnetic field strength to stimulate the nerve was estimated. Here, the conservativeness of protection limits of the international guidelines and standards for peripheral stimulation was confirmed. The results showed a margin factor of 4–6 and 10–24 times between internal and external protection limits of Institute of Electrical and Electronics Engineers standard (IEEE C95.1) and International Commission on Non-Ionizing Radiation Protection guidelines, with the computed pain thresholds.

The State of Gerontological Training in Ghana: Implications for a Specialized Workforce and the Aging Population

The rise in older population in Ghana is accompanied by several challenges that may require trained professionals with specialized knowledge in geriatrics and gerontology to help address. Extensive review of existing literature, however, indicates a lack of comprehensive geriatric focused training in Ghana’s education system. Unfortunately, the scope of this training deficiency, potential impact on the geriatric workforce, as well as the health and wellbeing of the aging population on the national level have not been extensively examined. With the older adult population set to increase over the next few years, the need for geriatric-trained human service professionals in diverse disciplines, including medicine, nursing, psychology, social work and public health has become more pronounced. This paper is a review of the current state of gerontological education in higher institutions in Ghana. Specifically, authors examined (1) current geriatric-focused training programs available to students in all public/government owned institutions, (2) existing national level programs, and policies addressing training deficiencies, and (3) the implications of findings for future geriatric workforce as well as the health and wellbeing of older Ghanaians. The findings call attention to the need for a nationwide geriatric-focused training system and policies aimed at prioritizing specialized care for the older population. Culturally appropriate recommendations for integrating gerontological training and education in tertiary institutions are discussed. Guidelines and standards based on the Academy for Gerontology in Higher Education (AGHE) Competencies for Undergraduate and Graduate Education are proposed.

Detecting Emotions through Electrodermal Activity in Learning Contexts: A Systematic Review

There is a strong increase in the use of devices that measure physiological arousal through electrodermal activity (EDA). Although there is a long tradition of studying emotions during learning, researchers have only recently started to use EDA to measure emotions in the context of education and learning. This systematic review aimed to provide insight into how EDA is currently used in these settings. The review aimed to investigate the methodological aspects of EDA measures in educational research and synthesize existing empirical evidence on the relation of physiological arousal, as measured by EDA, with learning outcomes and learning processes. The methodological results pointed to considerable variation in the usage of EDA in educational research and indicated that few implicit standards exist. Results regarding learning revealed inconsistent associations between physiological arousal and learning outcomes, which seem mainly due to underlying methodological differences. Furthermore, EDA frequently fluctuated during different stages of the learning process. Compared to this unimodal approach, multimodal designs provide the potential to better understand these fluctuations at critical moments. Overall, this review signals a clear need for explicit guidelines and standards for EDA processing in educational research in order to build a more profound understanding of the role of physiological arousal during learning.

Hydrologic Performance of Experimental Green Roofs Stands as the Effect of Climate Condition

The water storage capacity of a green roof forms several benefits for the building and its environment. The hydrologic performance is traditionally expressed by the runou coefficient, according to international guidelines and standards. The runoff coefficient is a dimensionless coefficient relating the amount of runoff to the amount of precipitation received. It is a larger value for areas with low infiltration and high runoff (pavement, steep gradient), and lower for permeable, well vegetated areas (forest, flat land). The paper is presenting 3 experimental stands of green roofs. Each stand is unique in terms of its construction. The aim of this paper is to highlight how green roof responds to real clima events. The experiment provides mathematical graphs and behaviour of the geen roof stands from 03/2019 to 01/2021.

Bridging the gap: introduction of an antimicrobial peripherally inserted central catheter (PICC) in response to high PICC central line-associated bloodstream infection incidence

Objective: To reduce the incidence of central line-associated bloodstream infection (CLABSI) in peripherally inserted central catheters (PICC) through the introduction of an antimicrobial (AM) catheter as recommended in evidence-based guidelines and standards. Design: Quality improvement project comparing incidence of infections pre-implementation and postimplementation of the new catheter. Setting: A 582-bed community teaching hospital in Northwest Indiana. Methods: Pre-implementation analysis of surveillance data indicated that 50% of CLABSIs occurred inpatients with PICCs in situ. A gap analysis was performed to review institutional practices against evidence-based recommendations. The use of an AM catheter was supported in each of the documents consulted. After introduction of the new device, performance was measured in a prospective manner using standardized Centers for Disease Control and Prevention (CDC) National Healthcare Safety Network (NHSN) surveillance protocols for CLABSI and internal data sources for other measures. Results: After 30 months of data collection, the PICC CLABSI incidence reduced from a baseline rate of 1.83/1000 PICC days to 0.162/1000 PICC days (91.15% reduction, P=0.0002). Conclusion: Combined with continued compliance with basic prevention strategies (ie use of a central line insertion checklist/insertion bundle) and optimization of device selection and lumen justification, the introduction of an antimicrobial/antithrombogenic (AM/AT) PICC was associated with a significant reduction in CLABSI.

Implementing BIM for conventional tunnels - a proposed methodology and case study

The topic of Building Information Modelling (BIM) adoption by public organizations has become a central subject of research, and a significant amount of BIM documents, guidelines, and standards have been created to meet different organizational purposes. Compared to the building industry, the application of BIM tools for tunnel project management is lagging far behind. This paper proposes a methodology for integrating BIM tools for conventional tunnelling. A fundamental distinction is made between the tunnel internal architectural domain and the external structural domain. For the former, BIM methodology can be applied similarly to the building industry. For the latter, it is suggested that a BIM model be built according to the essential information generated during tunnelling excavation. The proposed methodology was put to test for an actual tunneling project. A routine was established where the supervisor on behalf of the owner was responsible for gathering and reporting essential data in tabular form. Via REVIT's Application Programming Interface (API), a code was developed so that a BIM model was built and updated automatic to data insertion. Ultimately, the final BIM model allows managing up-to-date qualitative and quantitative information visually. Thus, human understanding and interpretation are enhanced for future uses, such as maintenance, future renovations and project post-analysis.

UAV Block Geometry Design and Camera Calibration: A Simulation Study

Acknowledged guidelines and standards such as those formerly governing project planning in analogue aerial photogrammetry are still missing in UAV photogrammetry. The reasons are many, from a great variety of projects goals to the number of parameters involved: camera features, flight plan design, block control and georeferencing options, Structure from Motion settings, etc. Above all, perhaps, stands camera calibration with the alternative between pre- and on-the-job approaches. In this paper we present a Monte Carlo simulation study where the accuracy estimation of camera parameters and tie points’ ground coordinates is evaluated as a function of various project parameters. A set of UAV (Unmanned Aerial Vehicle) synthetic photogrammetric blocks, built by varying terrain shape, surveyed area shape, block control (ground and aerial), strip type (longitudinal, cross and oblique), image observation and control data precision has been synthetically generated, overall considering 144 combinations in on-the-job self-calibration. Bias in ground coordinates (dome effect) due to inaccurate pre-calibration has also been investigated. Under the test scenario, the accuracy gap between different block configurations can be close to an order of magnitude. Oblique imaging is confirmed as key requisite in flat terrain, while ground control density is not. Aerial control by accurate camera station positions is overall more accurate and efficient than GCP in flat terrain.

Bridging the Gap. Introduction of an Antimicrobial Peripherally Inserted Central Catheter (PICC) in Response to High PICC Central Line-Associated Bloodstream Infection Incidence

Highlights Abstract Objective: To reduce the incidence of central line-associated bloodstream infection (CLABSI) in peripherally inserted central catheters (PICC) through the introduction of an antimicrobial (AM) catheter as recommended in evidence-based guidelines and standards. Design: Quality improvement project comparing incidence of infections pre-implementation and postimplementation of the new catheter. Setting: A 582-bed community teaching hospital in Northwest Indiana. Methods: Pre-implementation analysis of surveillance data indicated that 50% of CLABSIs occurred in patients with PICCs in situ. A gap analysis was performed to review institutional practices against evidence-based recommendations. The use of an AM catheter was supported in each of the documents consulted. After introduction of the new device, performance was measured in a prospective manner using standardized Centers for Disease Control and Prevention (CDC) National Healthcare Safety Network (NHSN) surveillance protocols for CLABSI and internal data sources for other measures. Results: After 30 months of data collection, the PICC CLABSI incidence reduced from a baseline rate of 1.83/1000 PICC days to 0.162/1000 PICC days (91.15% reduction, P = 0.0002). Conclusion: Combined with continued compliance with basic prevention strategies (i.e., use of a central line insertion checklist/insertion bundle) and optimization of device selection and lumen justification, the introduction of an antimicrobial/antithrombogenic (AM/AT) PICC was associated with a significant reduction in CLABSI.

Epidemiology and Informed Consent

This chapter focuses on informed consent, which is a central concept and practice in the protection of the rights and interests of both patients receiving clinical care and individuals participating in research. It addresses the commitment to the ethical principles underlying informed consent that dates back to the early twentieth century, as reflected in many countries' laws governing the physician–patient relationship. It also recounts how informed consent was codified into national policies and international guidelines and standards for research on human subjects. The chapter explores the parallel origins of informed consent and its applications, which are based on distinctions between clinical practice and research and do not naturally apply to or readily translate to epidemiology. It outlines the requirements for consent that have been and are treated differently in epidemiology depending on the type of activity and sometimes the practicability of seeking consent from participants.

Towards Effective Visual Communication with Positive user Experience: High Contrast and Visibility vs. user-Friendliness/Positive Perception

Proper contrast used for elements within websites or applications is one of the key factors providing their visibility and ability to attract user attention. While usability guidelines and standards such as WCAG 1 assume the existence of minimal contrast for optimum user experience, maximal contrast for positive user experience has not been defined. Recent studies showed that too high a contrast can be harmful for user experience, while visibility is reduced if it is too low. In the present study, experiments were performed to examine the level of user-friendliness and visibility for selected color pairs. We calculated the color contrast according to the WCAG standard. As a result, it was possible to find color combinations not necessarily with a high contrast but delivering visibility and not diminishing user experience. Finally, a ColoUR Picker Tool was developed that supports designers in the design of effective visual communication, which is understood as searching for a balance between user-friendliness, visibility, and color contrast. Research expands current efforts towards effective web design and increased user experience.