JOB SATISFACTION OF MEDICAL STAFF AT NATIONAL OTORHINORARYNOLOGY HOSPITAL OF VIETNAM, 2019

Objective: Evaluation of job satisfaction of medical staff at National Otorhinorarynology Hospital of Vietnam, 2019.Methods: Design a cross-sectional descriptive study, interview 306 health workers according to a set of prepared questionnaires built on the two-factor theory of Ferederick Herzberg.Results: The overall satisfaction rate of medical staff is high, reaching 95.4%. health workers are most satisfied with their relationship with colleagues 93.5%, followed by learning and developmentopportunities 91.8%, income and policies, both are 88.9%, on benefits 88.6%, on supervisor supervision 88.2% and finally on working conditions 82.7%. Logistic regression analysis showedthat the overall satisfaction rate in the married group was lower than the single group (OR=0.75; 95%CI: 0.42-0.99; p<0.05); higher in the group of intermediate and college degrees than in theuniversity group (OR=1.63; 95%CI: 1.12-2.85; p<0.001); in the group working for more than 15 years was higher than that of the group under 5 years (OR=1.66; 95%CI: 1.06-2.23; p<0.05).Conclusion: Effective management in the hospital in the context of financial autonomy helps the satisfaction rate of health workers to be high. It is necessary to improve the infrastructure in some faculties and focus on the group of medical staff with short working years in human resources.

Indigenous Studies Working Group Statement

In 2018, the authors were invited to share their perspectives as Indigenous studies scholars to the work of Breakthrough Listen, an organization affiliated with both the Berkeley SETI Research Center (BSRC) and the Search for Extraterrestrial Intelligence (SETI). This collectively authored statement highlights some of the ethical concerns these authors perceived regarding the history colonialism and the expectations to find “advanced” or “intelligent” extraterrestrial life. A prologue contextualizes the short working group statement and we then provide the unedited original statement in its entirety.

Research of the properties of magnetic fillers of cylindrical shape

It has been noted that the information on magnetic properties of specific magnets available in the design and operation of magnetic separators/analyzers using magnetic fillers in the form of balls as the working body (polygradient type) is extremely limited, especially for magnets with varying sphericity coefficients (mutual ratios of characteristic sizes). Experiments using cylindrical samples (porous) as a ferromagnetic matrix rendered the induction data subsequently applied to establish the magnetic permeability, susceptibility, and magnetization values for the samples at various values of the length-todiameter ratio of φ = 1–16. The demagnetizing factor N was obtained and analyzed for the «short» samples (1 ≤ φ [φ]) in the range of magnetizing field strengths of 9–47 kA/m, taking into account the established transient value of φ = [φ] = 10–12 (when, at φ ≥ [φ], the magnetic properties of the sample correspond to the magnetic properties of its quasi-solid material). The analysis results for these data, required when assessing the actual magnetic properties of «short» working bodies, characteristic of polygradient magnetic separators/ analyzers, demonstrate the validity of the exponential dependence (decreasing with increasing) of their demagnetizing factor. The research was carried out with the financial support of the Ministry of Education and Science of the Russian Federation within the framework of the State Assignment in the field of science (project No. 0706-2020-0024) and of the Russian Foundation for Basic Research and the Royal Society of London under research project No. 20-52-10006.

Biomechanical Comparison of a Notched Head Locking T-Plate and a Straight Locking Compression Plate in a Juxta-Articular Fracture Model

Objective This investigation compared the biomechanical properties of a 2.0 mm locking compression notched head T-plate (NHTP) and 2.0 mm straight locking compression plate (LCP), in a simple transverse juxta-articular fracture model. Study Design Two different screw configurations were compared for the NHTP and LCP, modelling short (configuration 1) and long working length (configuration 2). Constructs were tested in compression, perpendicular and tension non-destructive four point bending and torsion. Plate surface strain was measured at 12 regions of interest (ROI) using three-dimensional digital image correlation. Stiffness and strain were compared between screw configurations within and between each plate. Results The LCP was stiffer than the NHTP in all three planes of bending and torsion (p < 0.05). The NHTP had greater strain than the LCP during compression bending and torsion at all ROI (p < 0.0005). The short working length was stiffer in all three planes of bending and in torsion (p < 0.05) than the longer working length for both plates. The long working length showed greater strain than the short working length at most ROI. Conclusion In this experimental model, a 2.0 mm LCP with two screws in the short fragment was significantly stiffer and had lower plate strain than a 2.0 mm NHTP with three screws in the short fragment. Extending the working length significantly reduced construct stiffness and increased plate strain. These findings may guide construct selection.

Multi-mode Microscopic Hyperspectral Imager for the Sensing of Biological Samples

In this work, we develop a multi-mode microscopic hyperspectral imager (MMHI) for the detection of biological samples in transmission imaging, reflection imaging and fluorescence mode. A hyperspectral image cube can be obtained with 5 μm spatial resolution and 3 nm spectral resolution through push-broom line scanning. To avoid possible shadows produced by the high magnification objective with a short working distance, two illumination patterns are designed to ensure the co-axiality of the illumination and detection. Three experiments for the detection of zebrafish and fingerprints and the classification of disaster-causing microalgae verify the good capability and functionality of the system. Based on the detected spectra, we can observe the impacts of β-carotene and melanin in zebrafish, hemoglobin in the fingertip, and chlorophyll in microalgae, respectively. Multi-modes can be switched freely according to the application requirement and characteristics of different samples, like transmission mode for the transparent/translucent sample, reflection mode for the opaque sample and fluorescence mode for the fluorescent sample. The MMHI system also has strong potential for the non-invasive and high-speed sensing of bio or clinical samples.

Effect of Plate Type and Working Length on a Synthetic Compressed Juxta-Articular Fracture Model

Objective This investigation compared the biomechanical properties of a 2.0 mm locking compression notched head T-plate (NHTP) and 2.0 mm straight locking compression plate (LCP), in a compressed, short, juxta-articular fragment fracture model. Methods Two different screw configurations were compared for the NHTP and LCP, modelling short (configuration 1) and long working length (configuration 2). Constructs were tested in compression, perpendicular and tension four-point bending and torsion. Plate surface strain was measured at 12 regions of interest using three-dimensional digital image correlation. Stiffness and strain were compared. Results The LCP was stiffer than the NHTP in all three planes of bending (p < 0.05). The NHTP was stiffer than the LCP in torsion (p < 0.05). The NHTP had greater strain than the LCP during compression bending and torsion (p < 0.0005). The short working length NHTP was stiffer in all three planes of bending and in torsion (p < 0.05) than the longer working length. The short working length LCP was stiffer in compression bending and in torsion (p < 0.05) than the longer working length. The long working length showed greater strain than the short working length at multiple regions of interest. Conclusion In this experimental model of a compressed transverse fracture with a juxta-articular 9 mm fragment, a 2.0 mm LCP with two hybrid screws in the short fragment was stiffer than a 2.0 mm NHTP with three locking screws in the short fragment in three planes of bending but not torsion. Extending the working length of each construct reduced construct stiffness and increased plate strain.

Effects of combination of retarders on calcium sulfoaluminate (CSA) cement systems

One method of increasing the sustainability of concrete construction through reductions in emissions and energy requirements is through the use of alternative binders. Calcium Sulfoaluminate (CSA) cement has been developed as a low energy cement, as it has up to 40% less embodied carbon dioxide emissions due to its lower calcium content and reduced clinkering temperature relative to Portland cement. However, despite the advantages of CSA cement, its rapid setting time limits the use of this material to applications when short working time is required. To facilitate better control of the timing of CSA hardening and strength gain, several approaches to retarder usage and dosing have been studied. In this paper, use of chemical retardants, including citric acid, tartaric acid, and borax with CSA cement used alone and in combination with each other, and their effects on phase development and hardened binder properties were evaluated and discussed in relation to their retardation mechanisms. Because of differing working mechanisms of the retarders, combinations of citric acid and borax showed relationships that averaged the properties of each retarder, while combinations of citric acid and tartaric acid showed relationships that added the effects of the two retarders together. Setting time of CSA cement was delayed successfully, using retarders both alone and in combination, however combination mixes generally decreased compressive strength compared to the strengths of equivalent total singular retarder dosage. Relationships between heat release and setting time were developed and may prove useful for prediction of largescale application field performance.

Illuminance and Starting Distance of the Far Field of LED-Array Luminaire Operated at Short Working Distance

A luminaire with a light-emitting diode (LED) array can provide hotspot illumination in a short range. Therefore, a design of a luminaire with the largest central illuminance (LCI) and a high uniformity is warranted. In this paper, we present a study of illuminance variation with respect to the distance of an illumination target of a luminaire with LED array. The emission property of the luminous intensity is characterized by the cosine power law or the divergent angle of full width at half maximum (FWHM). A real LED module is designed to create the simulation for different luminaire types. The occurrence of the LCI and the far-field region are observed. Our results demonstrate that the LCI distance remains shorter than the starting distance of the far field (SDFF). To simplify the simulation, we propose the replacement of the real LED module with a point or flat-extended source. Such light sources must be equipped with the specific cosine power factor corresponding to the divergent angle of the FWHM of the LED module. These light sources are acceptable for describing illumination characteristics, including the SDFF. Our results may facilitate the design of LED-array luminaires operated at short working distances, such as reading lighting or illumination in microscopes.

Why Do We Do What We Do? The Values of the Social History of Medicine

At the Society for the Social History of Medicine (SSHM)’s biennial conference in Liverpool in July 2018, members gathered to discuss a short working paper developed by the Society’s executive committee to articulate the values underpinning the SSHM’s mission. The occasion marked the first public discussion of this document, in development since 2015, which was intended to encourage disciplinary self-awareness and engagement, to give a sense of the breadth and importance of work carried out in our field and to spark broader discussion. To further these aims as the Society celebrates its fiftieth anniversary, the working paper appears here, accompanied by a foreword from the Society’s Policy Development Officer and the lightly revised invited responses shared that day by five members at different career stages.