bluuebunny/crossref_metadata_2025 huggingface dataset:
A Systems Approach to Estimating the Uncertainty Limits of X-Ray Radiographic Metrology
Authors: Panas Robert M. , Cuadra Jefferson A. , Mohan K. Aditya , Morales Rosa E.
Published: December 2020

Micro- and nanomanufacturing capabilities have rapidly expanded over the past decade to include complex three-dimensional (3D) structure fabrication; however, the metrology required to accurately assess these processes via part inspection and characterization has struggled to keep pace. X-ray computed tomography (CT) is considered an ideal candidate for providing the critically needed metrology on the smallest scales, especially internal features, or inaccessible regions. X-ray CT supporting micro- and nanomanufacturing often push against the poorly understood resolution and variation limits inherent to the machines, which can distort or hide fine structures. We develop and experimentally verify a comprehensive analytical uncertainty propagation signal variation flow graph (SVFG) model for X-ray radiography in this work to better understand resolution and image variability limits on the small scale. The SVFG approach captures, quantifies, and predicts variations occurring in the system that limit metrology capabilities, particularly in the micro/nanodomain. This work is the first step to achieving full uncertainty modeling of CT reconstructions and provides insight into improving X-ray attenuation imaging systems. The SVFG methodology framework is applied to generate a complete basis set of functions describing the major sources of variation in radiographs. Five models are identified, covering variation in energy, intensity, length, blur, and position. Radiographic system experiments are defined to measure the parameters required by the SVFGs. Best practices are identified for these measurements. The SVFG models are confirmed via direct measurement of variation to predict variation within 30% on average.
A Qualitative Exploration of Perceptions of a Digital Intervention to Promote Physical Activity in Older Adults
Authors: Pollet Sebastien , Denison-Day James , Bradbury Katherine , Essery Rosie , Grey Elisabeth , Western Max , Mowbray Fiona , Smith Kirsten A. , Slodkowska-Barabasz Joanna , Mutrie Nanette , Little Paul , Yardley Lucy
Published: December 2020

Purpose:This study explored participant views of a web-based physical activity intervention for older adults and examined how they resonate with the key principles that guided intervention development.Methods:Qualitative interviews were carried out with 52 older adults. A deductive qualitative analysis approach was taken, based around the intervention’s key principles.Results:Participants expressed mostly positive views of the intervention features, broadly confirming the appropriateness of the key principles, which were to: (a) encourage intrinsic motivation for physical activity, (b) minimize the risk of users receiving activity suggestions that are inappropriate or unsafe, (c) offer users choice regarding the activities they engage with and build confidence to undertake more activity, and (d) minimize the cognitive load and need to engage with the intervention website. The findings also identified ways in which content could be improved to further increase acceptability.Conclusion:This study illustrates how using the person-based approach has enabled the identification and implementation of features that older adults appreciate.
Is Physical Activity Associated With Loneliness or Social Isolation in Older Adults? Results of a Longitudinal Analysis Using the Irish Longitudinal Study on Ageing
Authors: McMullan Ilona I. , Bunting Brendan P. , Burns Annette , Smith Lee , Cunningham Connor , O’Sullivan Roger , Blackburn Nicole E. , Wilson Jason J. , Tully Mark A.
Published: December 2020

Social relationships are central to the health and well-being of older adults. Evidence exploring the association of physical activity (PA) with social isolation and loneliness is limited. This study uses a path analysis to investigate the longitudinal association between loneliness and social isolation with PA using the Irish Longitudinal Study on Ageing. Higher levels of social isolation measured using the Berkman–Syme Social Network Index were directly and indirectly associated with lower levels of walking, moderate PA, and vigorous PA over 6 years. Additionally, higher levels of walking were associated with lower levels of loneliness measured using a modified version of the University of California, Los Angeles loneliness scale over a 3-year period. Future interventions should target individuals who are more socially isolated and explore the effects of different types of PA on loneliness over time.
Supplemental Material: Seismic velocity structure of the Queen Charlotte terrace off western Canada in the region of the 2012 Haida Gwaii Mw 7.8 thrust earthquake
Authors: Riedel Michael , al. et
Published: December 2020

Modeled ray paths and comparisons to picked arrivals are shown here for the refractions in sediment layers 1 (Fig. S1) and 2 (Fig.S2), the reflections from the bottoms of sediment layers 1 (Fig. S3) and 2 (Fig. S4), the refraction from the bottom of the crustal velocity layer (Fig. S5), and the head-wave from the bottom of the crustal-velocity layer (Fig. S6).
Particle spectrum of the Reissner–Nordström black hole
Authors: Good Michael R. R. , Ong Yen Chin
Published: December 2020

The Reissner–Nordström black hole – moving mirror correspondence is solved. The beta coefficients reveal that charge makes a black hole radiate fewer particles (neutral massless scalars) per frequency. An old Reissner–Nordström black hole emits particles in an explicit Planck distribution with temperature corresponding to the surface gravity of its outer horizon.
From the Editor: Through the Eyes of History
Authors: Rajeshwar Krishnan
Published: December 2020

The history of science and technology is now a legitimate sub-discipline within history. It examines how humanity’s understanding of the natural world and our ability to manipulate it have changed over the millennia. This field of history also studies the cultural, economic, and political impact of scientific innovation.
Gordon E. Moore and His Legacy: Four Decades and Counting
Authors: Rajeshwar Krishnan , Roozeboom Fred
Published: December 2020

Forty years is a long time, but amazingly enough, innovations in mainstream silicon microelectronics have largely continued to follow Gordon Moore’s prescient predictions.
The Origins of Diffused-Silicon Technology at Bell Labs, 1954-55
Authors: Holonyak Nick
Published: December 2020

Silicon-based transistor and integrated circuit technology has grown so large and become so important that it is difficult to recognize how it all began. In spite of the obvious differences between germanium and silicon, it was not evident during the early 1950s in what form and substance the transistor would prevail.
Applications of Ionic Liquids in Synthesis and Catalysis
Authors: Dyson Paul J. , Geldbach Tilmann
Published: December 2020

The “modern ionic liquids” described in the first article in this issue by Keith Johnson have certainly captured the imagination of chemists across the globe, and without at doubt, nowhere more than in synthesis and catalysis.
Measuring the Standardization Ability of Construction Enterprises from a Dual Perspective
Authors: Su Yikun , Wang Huimin , Zhou Zhichao , Su Weisheng , He Tingquan
Published: December 2020

With the increase in large-scale engineering and construction projects and the enhancement of technical complexity, the ability to standardize has increasingly become one of the core elements of the overall competitiveness of construction enterprises. Previous studies have contributed to the relevant standardization ability literature. However, there remains a great deal of uncertainty concerning the standardization ability of construction enterprises (SACE). The measurable indicators still need to be further explored based on a comprehensive theory. This research aims to explore a model for evaluating the SACE and, explicitly, the status of standardization ability. The measurement index system for the SACE covers three dimensions and eight subcategories with 30 indicators which was established through a review of the literature and systematic analysis. A comprehensive measurement model for the SACE was designed from the dual perspectives of dominance and competitiveness. Finally, a case study was conducted to provide recommendations for policymakers to improve their standardization ability. The results indicate that the SACEs are inconsistent, and the vast majority of enterprises has relatively balanced standardization abilities. Furthermore, standardization ability is affected by the synergy of the three primary dimensions. Multiple linear regression was subsequently used to analyze the correlations among the three dimensions, which showed that there were obvious interaction effects and strong correlations among the three dimensions and indicated that the evaluation based on the three dimensions was reasonable. The findings are useful for the formulation of standardization policies and provide an evaluation and testing model for decision makers to improve their standardization ability.
Mechanical Properties of the Vertical Joints of Prefabricated Underground Silo Steel Plate Concrete Wall
Authors: Chuai Jun , Hou Zhilong , Wang Zhenqing , Wang Lumin
Published: December 2020

Reliable joint connection is key to designing prefabricated structures. To study the mechanical properties of the vertical joints in the designed prefabricated underground silo steel plate concrete composite wall and verify their reliability, flexural and compressive experiments were conducted using two groups of six full‐scale steel plate concrete composite wall specimens; the mechanical properties between jointed and jointless specimens were compared and analyzed. The experimental results indicate that all specimens are in the elastic stage during the entire loading process; further, they exhibit large stiffness and high bearing capacity without damages. Thus, the designed vertical joints of the steel plate concrete composite wall provide a reliable connection that is safe and applicable. Further, the flexural and compressive properties of jointed and jointless specimens were found to be similar; the newly designed prefabricated underground silo steel plate concrete composite wall could be designed using the “equivalent principle” that the combined wall design calculation with the joint could be equivalent to that without the joint.
Multihazard Response Control of Base-Isolated Buildings under Bidirectional Dynamic Excitation
Authors: Zelleke Daniel H. , Saha Sandip K. , Matsagar Vasant A.
Published: December 2020

The issues of safety and posthazard functionality of structures under multihazard scenarios are some of the significant challenges in the current dynamic and rapidly growing urban environment. In this paper, multistory base-isolated buildings are investigated under the independent multihazard scenario of earthquake and blast-induced ground motion (BIGM). Multistory building models equipped with five different types of isolation systems, namely, the laminated rubber bearing (LRB), lead-rubber bearing (N-Z system), pure friction (PF) system, friction pendulum system (FPS), and resilient-friction base isolator (R-FBI) are assessed under bidirectional multihazard excitations. The suitability of the isolation systems and their key parameters in protecting multistory buildings is evaluated. Furthermore, the influence of the superstructure characteristics, such as the superstructure damping and the number of stories, is also assessed. The effect of bidirectional hazards on fixed-base buildings is also presented for comparison. The key response quantities of base-isolated buildings are presented and compared for different isolation systems. Parametric investigations are also conducted, and the trends of the response quantities are presented to study the influence of important parameters of isolation systems in protecting the buildings under the multihazard scenario of earthquake and BIGM. The results of the investigation show that the behaviors of the buildings equipped with various isolation systems are different for the two hazards. Moreover, the influences of the key parameters of the isolation systems are found to be different for various hazards. Therefore, the selection of design parameters of isolation systems shall be made with due consideration of the influence of multiple hazards. Additionally, the influence of the properties of the superstructure, such as the number of stories and the damping of the superstructure, on the behavior of the base-isolated buildings under the multihazard loading, is presented.
Application of Multiple Detection Data in the Analysis of Snowstorm Processes in Xinjiang during the Central Asia Extreme Precipitation Observation Test (CAEPOT)
Authors: Zeng Yong , Yang Lianmei , Tong Zepeng , Zhang Zuyi
Published: December 2020

At present, there is insufficient research on the refinement of the vertical structure of winter snowstorm systems in arid areas, and, compared with the central and eastern China, the observation sites in arid areas of northwestern China are scarce. To deepen the understanding of dynamics and microphysical processes and improve the level of forecasting and warning of snowstorms in northwestern China, the Institute of Desert Meteorology, China Meteorological Administration, Urumqi, carried out the Central Asia Extreme Precipitation Observation Test (CAEPOT) in Yili, Xinjiang, a typical arid region in China in February 2020. This paper uses multiple fine detection datasets obtained from the CAEPOT, including radar wind profiler, ground-based microwave radiometer, and millimeter-wave cloud radar to analyze macroscopic characteristics and microphysical changes of snowstorm system in Xinjiang. Studies have shown that the low trough with sufficient moisture, heat, power conditions, and weakening banded cloud system, which moved eastward from the Aral Sea to the west of Xinjiang during the snowstorm, were the key influencing system of this snowstorm. Before the snowstorm, the vertical shear of the horizontal wind field was severe, which aggravated the instability of the atmosphere, and there was upward motion in the lower atmosphere. A variety of physical quantities related to moisture showed a tendency to increase at the lower level and could be used as an early warning signal for snowstorm about 8 hours in advance, and the cloud and snow particles observed by millimeter-wave cloud radar were simultaneously developing upward and downward from 4 km, providing snowstorm warning 12 hours in advance. During the snowstorm, the horizontal wind speed and vertical speed were obviously enhanced, and the physical quantities related to moisture further increased, and, with the blocking and uplifting of the Tianshan Mountains, the snowstorm increased. The particles collided and grew while falling, resulting in a decrease in particle concentration and an increase in particle radius from high altitude to the ground, eventually resulting in near-ground reflectivity factor up to 30 dBz. In addition, reflectivity factor, physical quantities related to moisture, wind field, particle concentration, and particle radius all had a good correspondence with the beginning, end, and intensity of snowstorm, so when the physical quantities mentioned above weakened and stopped, snowstorm also weakened and stopped. In a word, this research is an important and meaningful work that provides more backgrounds and references for the forecast and warning of snowstorm in northwestern China.
A new fossil genus of the tribe Synchitini Erichson (Tenebrionoidea: Zopheridae: Colydiinae) from Eocene Baltic amber

Authors: ALEKSEEV VITALII I. , PANKOWSKI MAXIMILIAN G.
Published: December 2020

A new extinct monotypic genus and species of the cylindrical bark beetles, Semicoxelus sontagae gen. et sp. nov., is described and figured based on an inclusion in Baltic amber. The new representative from the Eocene is classified within the synchitine tribe and placed near the morphologically close extant genera, including Coxelus Dejean, Diodesma Latreille and Notocoxelus Ślipiński & Lawrence. The description and comparison of the new fossil are accompanied by a brief discussion focusing on an interesting morphological character of cylindrical bark beetles: the presence/absence of interfacetal setae on the eyes.
“It’s been like a miracle”: Low-income Arkansans and access to health care services following Medicaid reform
Authors: Abraham Traci H. , McBain Sacha A. , Goudie Anthony , Hudson Teresa , Thompson Joseph W.
Published: December 2020

This article reports qualitative results from a mixed-methods evaluation of the Arkansas Health Care Independence Program. Qualitative data was collected using telephone interviews with 24 low-income Arkansans newly enrolled in Medicaid or a Qualified Health Plan in 2014. We used methods developed for rapid qualitative assessment to explore a range of general barriers and facilitators to accessing health care services. Secondary analysis guided by the most significant change technique aided in the construction of case summaries that permitted insights into participants’ experiences of managing their health over time. Barriers to accessing health care services included treatment costs, beliefs and values related to health, limited health literacy, poor quality health care, provider stigma, and difficulties that made travel challenging. For 1 participant who was no longer eligible for Medicaid or a QHP, lacking health care coverage was also problematic. Facilitators included having health care coverage, life experiences that re-enforced the value of prevention, health literacy, and enhanced health care services. Low-income Arkansans experiences accessing health care elucidate access as multi-dimensional, involving not only the availability of affordable services, but treatment effectiveness and patient experiences interacting with providers and clinic staff. We use these findings to formulate recommendations for programs and policies aimed at further increasing access to high-quality health care as a strategy for reducing health disparities.
Associations Between Private Health Insurance and Medical Care Utilization for Musculoskeletal Disorders: Using the Korea Health Panel Survey Data for 2014 to 2015
Authors: Jung Yoon-Sun , Kim Young-Eun , Go Dun-Sol , Munkhzul Radnaabaatar , Jung Jaehun , Yoon Seok-Jun
Published: December 2020

In South Korea, people may increase their medical coverage by purchasing private health insurance to augment low coverage provided by the National Health Insurance (NHI). Frequent and excessive use of medical care by those with private health insurance is an issue, especially for musculoskeletal disorders that require excessive care and contribute to moral hazard. In South Korea, since private health insurance is structurally linked to the scope of coverage with public health insurance, this increased use of medical care may adversely affect public health insurance finances. This study aimed to analyze the effects of private health insurance on medical care use for patients with musculoskeletal disorders. We used the Korea Health Panel 2014 to 2015 data that included 5622 participants who used medical care for musculoskeletal disorders in 2015. Two groups were created: those who purchased private health insurance ( n = 3588) and those without private insurance ( n = 2034). We compared their medical utilization using logistic regression, negative binomial regression, and multiple linear regression to determine the associations of private health insurance with medical care use. Medical expenditures by private health insurance purchasers were higher than those of non-purchasers for outpatient care ( P < .001), but no differences were found for inpatient care. Our findings suggest that the expansion of private health insurance further burdened the NHI financially, ultimately increasing the burden of medical expenses for the population. Research should implement demonstration studies with different groups of diseases.
On the approximate inverse Laplace transform of the transfer function with a single fractional order
Authors: Yüce Ali , Tan Nusret
Published: December 2020

The history of fractional calculus dates back to 1600s and it is almost as old as classical mathematics. Although many studies have been published on fractional-order control systems in recent years, there is still a lack of analytical solutions. The focus of this study is to obtain analytical solutions for fractional order transfer functions with a single fractional element and unity coefficient. Approximate inverse Laplace transformation, that is, time response of the basic transfer function, is obtained analytically for the fractional order transfer functions with single-fractional-element by curve fitting method. Obtained analytical equations are tabulated for some fractional orders of [Formula: see text]. Moreover, a single function depending on fractional order alpha has been introduced for the first time using a table for [Formula: see text]. By using this table, approximate inverse Laplace transform function is obtained in terms of any fractional order of [Formula: see text] for [Formula: see text]. Obtained analytic equations offer accurate results in computing inverse Laplace transforms. The accuracy of the method is supported by numerical examples in this study. Also, the study sets the basis for the higher fractional-order systems that can be decomposed into a single (simpler) fractional order systems.
Urban Impacts of Mobile Fuel Delivery Service
Authors: Broaddus Andrea
Published: December 2020

Mobile fuel delivery (MFD) uses a fueling truck to fill up personal and commercial fleet vehicles while they are parked overnight. This study used a sample data set provided by a San Francisco Bay Area company to explore the potential impacts on vehicle miles traveled (VMT), carbon dioxide (CO2) emissions, and traffic congestion. An analysis of vehicle travel associated with gas station trips was conducted to establish a basis for comparison. Future scenarios comparing the potential impacts of scaled-up MFD services in 2030 were also developed. The study concluded that MFD services compared favorably to gas stations in relation to environmental and traffic benefits in the longer term, even though personal fueling trips tended to generate low VMT. Benefits stemmed from efficiencies achieved by fueling multiple vehicles per delivery trip, replacing car share vehicle fueling trips, and removing trips from the network during peak hours. This analysis estimated that total annual CO2 emissions associated with fuel delivery operations in the Bay Area were 76 metric tons, which is less than a typical gas station with 97 metric tons. Under assumptions of declining demand for gasoline and significantly fewer gas stations, and with highly efficient optimized operations, mobile delivery could gain up to 5% market share for gas and not add additional VMT over the business as usual scenario.
Overcoming the Challenges of Collaboratively Adopting Artificial Intelligence in the Public Sector
Authors: Campion Averill , Gasco-Hernandez Mila , Jankin Mikhaylov Slava , Esteve Marc
Published: December 2020

Despite the current popularity of artificial intelligence (AI) and a steady increase in publications over time, few studies have investigated AI in public contexts. As a result, assumptions about the drivers, challenges, and impacts of AI in government are far from conclusive. By using a case study that involves a large research university in England and two different county councils in a multiyear collaborative project around AI, we study the challenges that interorganizational collaborations face in adopting AI tools and implementing organizational routines to address them. Our findings reveal the most important challenges facing such collaborations: a resistance to sharing data due to privacy and security concerns, insufficient understanding of the required and available data, a lack of alignment between project interests and expectations around data sharing, and a lack of engagement across organizational hierarchy. Organizational routines capable of overcoming such challenges include working on-site, presenting the benefits of data sharing, reframing problems, designating joint appointments and boundary spanners, and connecting participants in the collaboration at all levels around project design and purpose.
Experimental study on soft PSD material of dual pulse solid rocket motor
Authors: Wang Chunguang , Tian Weiping , Wang Liwu , Xu Guiyang
Published: December 2020

In order to study the failure reason of the soft PSD in the dual pulse solid rocket motor (SRM), the deformation process of the intermediate section of the second pulse combustion chamber was simplified to the two-dimensional plane strain state, and the calculation method of the circumferential strain of the soft PSD was obtained. The influencing factors of the circumferential strain of the soft PSD were studied. The main factors affecting the circumferential strain of the soft PSD are the gap between the soft PSD and the propellant grain, and the circumferential strain on the inner surface of the propellant grain. The calculation method could be used to initially estimate the circumferential strain of the soft PSD, and then predict the rationality and feasibility of the design scheme. The apparent morphology and area change rate of EPDM materials of PSD under different strains were studied by DIC tensile test. The variation of the porosity of the EPDM material with the increase of strain was obtained by micro-CT. By comparing the SEM results of the fracture and the slit of the tensile test piece, the failure mode of the EPDM material of PSDs was determined, and the failure mechanism of the PSD structure was obtained. The conclusions obtained in this paper can provide a useful reference for the design of the PSD in dual pulse SRM.
Cumulative adaptation and linkages among adaptation, coping and vulnerability: a case of riverside slum households in Phnom Penh, Cambodia
Authors: Yang Jeasurk , Andriesse Edo
Published: December 2020

Adaptation and coping have been frequently compared. However, their relationship is still in dispute. So far, three approaches have been suggested: interchangeable, distinct and interrelated. We argue that the third is the most useful as it provides insights into how long-term adaptation can be achieved by a series of short-term coping mechanisms. Within this focus, we interpret adaptation in a novel way: as a complex cumulative result based on the interaction between multiple coping mechanisms and vulnerability dynamics. As such we reorient Smit et al.’s work on “cumulative adaptation”. Our empirical case is slum households affected by floods from the Mekong River in Phnom Penh, Cambodia. The inquiry is based on 119 surveys and 25 semi-structured interviews in nine slum communities. The results capture new trajectories of adaptation (or maladaptation), livelihoods and local collective action. The article explores implications for local development in slum communities in the global South.
In vitro and in vivo evaluation of clastogenicity of second-line antitubercular drug loaded PLGA nanoparticles
Authors: Pandey Avaneesh Kumar , Kumar Rajendra , Shafiq Nusrat , Kondel Ritika , Garg Shanky , Negi Harish , Arora Sunil Kumar , Varma Neelam , Malhotra Samir
Published: December 2020

Sustained release nanoformulations of second line antitubercular drugs levofloxacin and ethionamide had shown promise in pharmacokinetics and acute and sub-acute toxicity studies. The present study evaluated the clastogenicity potential of the nanoformulations of these antitubercular agents. Clastogenicity was evaluated by (a) in vitro micronucleus assay (b) in vivo micronucleus assay in Swiss albino mice and (c) sister chromatid exchange (SCE) in CHO cell lines. Ethionamide and levofloxacin loaded nanoparticles were 312 ± 64 nm and 245 ± 24 nm in size respectively and drug encapsulation was 35.2 ± 3.1% w/w and 45.6 ± 9.4% w/w, respectively. The frequency of MN-NCE/1000 NCE and MN-PCE/1000 PCE were significantly reduced in mice treated with ethionamide nanoparticle (3.5 ± 0.9, 13.8 ± 16.68) and levofloxacin nanoparticles (5.6 ± 2.7, 16.7 ± 12.7) compared to the mice treated with free ethionamide (11.5 ± 4.1, p = 0.23 and 45.19 ± 19.21, p = 0.38) and free levofloxacin (14.7 ± 1.88, p < 0.0001 and 54.6 ± 18.1, p = 0.0017), respectively. For in vitro, micronucleus assay frequencies of micronuclei per thousand bi-nucleated cells (MN-BN/1000 BN) was 188.3 ± 20.20 and 148 ± 20.42 for ethionamide and levofloxacin nanoparticles as compared to 232.6 ± 16.04 (p = 0.52) and 175 ± 5.56 (p = 0.45) for free ethionamide and levofloxacin, respectively. The average number of SCE per cell for nanoformulation of ethionamide were not different from that of free drug (4.9 ± 0.51 vs 4.1 ± 0.55, p = 0.86). The SCE per cells were not significant difference for nanoformulation of levofloxacin (2.33 ± 1.36 vs 5.46 ± 0.25, p = 0.88). In vitro and in vivo assays have shown relatively less clastogenic potential of equivalent dose of ethionamide nanoparticles as compared to the conventional formulation.
What Makes Things Funny? An Integrative Review of the Antecedents of Laughter and Amusement
Authors: Warren Caleb , Barsky Adam , McGraw A. Peter
Published: December 2020

Despite the broad importance of humor, psychologists do not agree on the basic elements that cause people to experience laughter, amusement, and the perception that something is funny. There are more than 20 distinct psychological theories that propose appraisals that characterize humor appreciation. Most of these theories leverage a subset of five potential antecedents of humor appreciation: surprise, simultaneity, superiority, a violation appraisal, and conditions that facilitate a benign appraisal. We evaluate each antecedent against the existing empirical evidence and find that simultaneity, violation, and benign appraisals all help distinguish humorous from nonhumorous experiences, but surprise and superiority do not. Our review helps organize a disconnected literature, dispel popular but inaccurate ideas, offers a framework for future research, and helps answer three long-standing questions about humor: what conditions predict laughter and amusement, what are the adaptive benefits of humor, and why do different people think vastly different things are humorous?
COVID-19 global pandemic planning: Dry heat incubation and ambient temperature fail to consistently inactivate SARS-CoV-2 on N95 respirators
Authors: Perkins Douglas J , Nofchissey Robert A , Ye Chunyan , Donart Nathan , Kell Alison , Foo-Hurwitz Ivy , Muller Timothy , Bradfute Steven B
Published: December 2020

The ongoing pandemic of the novel severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has placed a substantial strain on the supply of personal protective equipment, particularly the availability of N95 respirators for frontline healthcare personnel. These shortages have led to the creation of protocols to disinfect and reuse potentially contaminated personal protective equipment. A simple and inexpensive decontamination procedure that does not rely on the use of consumable supplies is dry heat incubation. Although reprocessing with this method has been shown to maintain the integrity of N95 respirators after multiple decontamination procedures, information on the ability of dry heat incubation to inactivate SARS-CoV-2 is largely unreported. Here, we show that dry heat incubation does not consistently inactivate SARS-CoV-2-contaminated N95 respirators, and that variation in experimental conditions can dramatically affect viability of the virus. Furthermore, we show that SARS-CoV-2 can survive on N95 respirators that remain at room temperature for at least five days. Collectively, our findings demonstrate that dry heat incubation procedures and ambient temperature for five days are not viable methods for inactivating SARS-CoV-2 on N95 respirators for potential reuse. We recommend that decontamination procedures being considered for the reuse of N95 respirators be validated at each individual site and that validation of the process must be thoroughly conducted using a defined protocol.
Equity-Centered Design Thinking in STEM Instructional Leadership
Authors: Khalil Deena , Kier Meredith
Published: December 2020

In the past decade, STEM (science, technology, engineering, and mathematics) instructional leaders have struggled with how to interpret and implement K–12 standards-based education so that minoritized learners have equal opportunity to be college and career ready. An equity-centered design thinking approach can support leaders to interrogate the often-time divergent values of stakeholders so they may collaboratively identify and address the problems of practice in STEM education. By considering the ethos and strategies necessary to intentionally center equity by design, this case presents prospective leaders the opportunity to practice converging divergent needs and beliefs about STEM education while they ideate solutions grounded in the experiences of minoritized learners.
Políticas públicas adoptadas en la pandemia de la COVID-19 en tres países de América Latina: contribuciones de la Promoción de la Salud para no volver al mundo que existía
Authors: Nogueira Júlia , Rocha Dais Gonçalves , Akerman Marco
Published: December 2020

El mundo, después de la pandemia de la COVID-19, no será el mismo que existía y ni tan siquiera eso es deseable. La reanudación de la "normalidad" (que solo es "normal" para unos pocos) sería el regreso a la producción y el consumo insostenibles, la pérdida de derechos, la exacerbación de las iniquidades y una brutalidad diaria para muchos que luchan por sobrevivir. En América Latina (AL), el fin del mundo ya se anunció incluso antes de la pandemia. Si, desde Bogotá - 1992, la Declaración de Promoción de la Salud denuncia la pobreza como el mayor determinante social de enfermedades en la región, los gobiernos parecen ignorarla, debilitando los sistemas de salud, educación, ciencia y tecnología, transferencia de ingresos y asistencia social bajo los auspicios de la austeridad fiscal, favoreciendo el aumento de la desigualdad. Usando datos de tres países, Argentina, Brasil y Chile: 1) se señalan sus bajas inmunidades sociales anteriores a la pandemia; 2) se analizan sus políticas públicas en respuesta a la pandemia, considerando los diferentes enfoques de intervención en salud: grupos de riesgo, población, vulnerabilidad y proporcionalismo universal; y, 3) se indica cómo la Promoción de la Salud (PS) podría influir sobre las políticas públicas para no volver al mundo que existía, usando como ancla dos documentos lanzados durante la pandemia y que explicitan la lente epistémica de la comunidad global de la PS en cinco puntos: intersectorialidad, sostenibilidad, empoderamiento, compromiso con la salud pública y equidad, y perspectiva de curso de vida. Evidencias producidas en el transcurso de la pandemia en los tres países indican que los enfoques adoptados en las políticas públicas pueden, o no, favorecer el alcance de la agenda inconclusa de la PS y del desarrollo sostenible.
Politics of care in the early years in Australia since the pandemic
Authors: Bryant Lisa
Published: December 2020

Almost every part of human society have been impacted by COVID-19 and it has exposed our world’s economic and social fault lines. How each country cared for their youngest members rapidly became obvious as one of those fault lines. Many countries had inadequate early education and care systems that quickly started to buckle under the impact of lockdowns. What happened in Australia, although unique in the exact way it played out, was essentially replicated around the world. Education and care of our youngest citizens was realised to be essential, market based care systems began to crumble, the government poured more subsidies into the system, and educators and teachers watched as their roles were reduced in the public’s eye to childminders. Educators and teachers had to take on more work as they sought to engage with children at home, and sought to keep themselves safe. Eventually the government granted everybody that needed it, free ‘childcare’, a move that would see economists, feminists and families call for it to remain free once the country re-opened. The main opposition party has now joined that call and we may see a legacy of a re-imagined education and care system in Australia in the wake of the pandemic.
Asymptomatic Cases and Limited Transmission of SARS-CoV-2 in Residents and Healthcare Workers in Three Dutch Nursing Homes
Authors: van Buul Laura W. , van den Besselaar Judith H. , Koene Fleur M. H. P. H. , Buurman Bianca M. , Hertogh Cees M. P. M. ,   COVID-19 NH-Study Group**, Smalbrugge Martin , Rutten Jeanine J. S. , den Boogert Elke M. , Wissing Michel D. , Rietveld Ariene , van Elsakker Mariska W. W. , Nonneman Marga M. G. , van Eeden Florien , van de Merwe Saskia , Niemansburg Sophie L. , Fanoy Ewout , Bootsma Hinke S. , van der Hagen Nicoline , Petrignani Mariska , van Muijen Jessica Edwards , Biesheuvel Karolien E. M.
Published: December 2020

We aimed to assess the contribution of a- and presymptomatic residents and healthcare workers in transmission of SARS-CoV-2 in nursing homes. We conducted two serial point-prevalence surveys, including standardized symptom assessment and nasopharyngeal and oropharyngeal testing for SARS-CoV-2, among 297 residents and 542 healthcare workers of three Dutch nursing homes (NHs) with recent SARS-CoV-2 introduction. At the first point-prevalence survey, 15 residents tested positive of which one was presymptomatic and three remained asymptomatic. At the second point-prevalence survey one resident and one healthcare worker tested SARS-CoV-2 positive and both remained asymptomatic. Although a limited number of SARS-CoV-2 positive cases were identified, this study confirms a- and presymptomatic occurrence of Covid-19. We additionally describe factors that may contribute to the prevention of transmission. Taken together, our study complements the discussion on effective SARS-CoV-2 screening in NHs.
Back to Basics: Redefining Health and Well-being in Unprecedented Times
Authors: Menon Nimitha , Laverock Amy , Parker Kristin
Published: December 2020

Human capital is undoubtedly one of the main engines of any successful business, and there is nothing more critical to the overall health of a business than ensuring health and safety of its people. Employers are uniquely positioned to improve health and safety through the workplace, yet many organisations struggle to decode the right formula for impactful initiatives and measuring success. It is particularly timely, as the ‘new normal’ of work has pushed workforce well-being up to the top of the priority list.

Evidence supports that a healthy and safe workforce can provide a competitive business advantage by positively impacting productivity, business output, sustainability and corporate brand and reputation. The article shares insights into the evolving well-being risk, social profile and medical trends globally with country-specific highlights. We delve into the survey findings on employer and employee perspective of well-being and expectation on the solutions that can support in ensuring overall well-being.
Knowledge, attitude and practice of health care workers on measuring adult vitamin D level, diagnosis of deficiency, and management of consequent health conditions in three ecologies of Ethiopia: a cross-sectional study
Authors: Mekonnen Wubegzier , Feleke Yeweyenhareg , Desalegn Yakob , Tarekegne Getahun , Lambisso Biruk , Haidar Jemal , Zewede Tewabech
Published: December 2020

Background

Vitamin D is essential for health and its shortage exacerbates overall mortality. Health care workers (HCWs) need to educate on its uses and sources although studies indicate their low level of practice. The main aim of this study is therefore to assess the knowledge, attitude and practice of measuring adult vitamin D status, diagnosis of deficiency and managing health consequences among HCWs in Ethiopia.

Methods

This study was conducted in three ecologies covering lowland, midland and highland districts. A total of 405 health care workers with different levels were interviewed. Tablets were used for data collection to archiving in a cloud server. Data were exported to Stata version 14 software for cleaning and analysis. Rates were computed and the Chi-square test was used to compare differences between the two groups. Binary logistic regression was used to measure the strength, direction and significance of the association between different covariates and the practice of HCWs.

Result

The level of knowledge, positive attitude and good practice in measuring adult vitamin D status, diagnosis of deficiency and managing health consequences among HCWs was 210 (51.8%), 261(63.5%) and 195(47.4%) respectively. The odds of good practice in the provision of adult vitamin D service were AOR = 6.87: 95% CI (3.57, 13.21) and AOR = 2.20: 95% CI (1.23, 3.92) times higher among HCWs in Addis Ababa and highlands compared with those working in lowlands. Good practice among clinicians was AOR = 4.26: 95% CI (1.48, 12.25) times higher compared with those working in leadership positions. The likelihood was AOR = 1.96: 95% CI (1.19, 3.23) times higher among those with good knowledge compared with those with poor knowledge. Besides, good practice in adult vitamin D service provision was AOR = 2.30: 95% CI (1.40, 3.78) times higher among those with positive attitude compared with those who had negative attitude.

Conclusions

A little over half of HCWs have good knowledge and close to two-thirds of them have positive attitude while less than half of them have good practice on adult vitamin D deficiency. Besides, HCWs’ residential ecology, clinical position, knowledge and attitude is associated with good practice on adult vitamin D. It is essential to provide rigorous and continuous training for HCWs focusing on their deployment ecology.
Human rights in patient care: a special collection
Authors: Ezer Tamar , Overall Judy
Published: December 2020

This piece introduces the special Public Health Reviews collection on human rights in patient care (HRPC). Work on HRPC dates back to 2007 and an Open Society Foundations initiative in collaboration with partners in Eastern Europe and Central Asia. We found that for marginalized groups, health care settings often were places of coercion, punishment, and/or violence rather than of treatment or care. At the same time, health care providers often did not know of their legal obligations and how to incorporate human rights norms in their work. They themselves faced a lack of independence, unsafe working conditions, and sanctions for providing evidence-based care. Laws existed that could potentially address violations, but they were rarely enforced, and most people did not know what they were. HRPC brings human rights principles to health care delivery and addresses the rights of both patients and health care providers. It seeks to translate laws and procedures protecting rights into practical terms, linking national, regional, and international frameworks. The special collection explores various aspects of HRPC, including state responsibility in private health facilities, reproductive health, palliative care, and intersections with public health. It further explores dimensions relevant to particular populations, including Roma, people who use drugs, and transgender persons.
IgG4-related lymphadenopathy – a difficult diagnosis
Authors: Gaspar Balan Louis
Published: December 2020

Background

The IgG4-related disease (IgG4-RD) is a systemic immune-mediated non-neoplastic disease associated with IgG4 positive plasma cells and fibrosis that often presents as a mass lesion. Although the disease could affect virtually any anatomical site, there are strong predilections for certain organs. IgG4-related lymphadenopathy can exhibit a broad morphologic spectrum. We describe a patient with IgG4-related lymphadenopathy with overlapping histological features that proved to be a diagnostic red herring.

Case presentation

A 58-year-old gentleman with multiple co-morbidities presented with obstructive jaundice, elevated transaminases, and bilateral inguinal and left axillary lymphadenopathy. Imaging of the abdomen and pelvis showed circumferential soft tissue thickening resulting in luminal narrowing of common and proximal bile duct with upstream intrahepatic biliary radicle dilatation, multiple enlarged lymph nodes, and homogenous soft tissue lesions in the tail of the pancreas and bilateral renal cortical parenchyma with perinephric soft tissue extension. Left inguinal, and axillary lymph node excision biopsies were suggestive of IgG4-RD. Serum IgG4 levels performed subsequently, were markedly elevated. The patient was treated with prednisone which led to resolutions of his symptoms, reduction in the size of the lesions, and reversal of abnormal laboratory parameters.

Conclusion

The diagnosis of IgG4-RD in lymph node excision biopsy is a difficult call to make and needs a multidisciplinary team. An early diagnosis renders timely intervention and prevents the progression of the disease and its complications.
Hazardous alcohol consumption among older adults: A comprehensive and multi-national analysis of predictive factors in 13,351 individuals
Authors: Listabarth Stephan , Vyssoki Benjamin , Waldhoer Thomas , Gmeiner Andrea , Vyssoki Sandra , Wippel Andreas , Blüml Victor , Gruber Maria , König Daniel
Published: December 2020

Background

Older adults exhibit heightened vulnerability for alcohol-related health impairments. Increases in the proportion of older adults within the European Union’s total population and prevalence rates of alcohol use disorders in this age group are being observed. This large scale international study was conducted to identify those older adults with an increased risk to engage in hazardous drinking behaviour.

Methods

Socio-demographic, socio-economic, personality characteristics (Big Five Inventory, BFI-10), and alcohol consumption patterns of 13,351 individuals from 12 different European countries, collected by the Survey of Health, Aging, and Retirement in Europe, were analyzed using regression models.

Results

Age, nationality, years of education, as well as personality traits, were significantly associated with alcohol intake. For males, extraversion predicted increased alcohol intake (RR = 1.11, CI = 1.07–1.16), whereas conscientiousness (RR = 0.93, CI = 0.89–0.97), and agreeableness (RR = 0.94, CI = 0.90–0.99), were associated with a reduction. For females, openness to new experiences (RR = 1.11, CI = 1.04–1.18) predicted increased alcohol intake. Concerning excessive drinking, personality traits, nationality, and age-predicted consumption patterns for both sexes: Extraversion was identified as a risk factor for excessive drinking (OR = 1.15; CI = 1.09–1.21), whereas conscientiousness was identified as a protective factor (OR = 0.87; CI = 0.823–0.93).

Conclusion

Hazardous alcohol consumption in the elderly was associated with specific personality characteristics. Preventative measures, crucial in reducing deleterious health consequences, should focus on translating the knowledge of the association of certain personality traits and alcohol consumption into improved prevention and treatment.
Two-Stage Fiberoptic Intubation in an Infant With a Rare Congenital Laryngopharyngo-Cutaneous Fistula: A Case Report
Authors: Jain Aditi , Dogra Neeti , Lazar Michelle S. , Menon Prema , Mathew Preethy J.
Published: December 2020

Branchial arches represent embryological precursors of the face, neck, and pharynx, and developmental abnormalities of these branchial arch derivatives can lead to airway anomalies. We report definitive repair of the fistula in an infant with a rare congenital laryngopharyngo-cutaneous fistula. This is the first report that describes a 2-stage fiberoptic intubation, a challenging technique performed for airway management of the aforementioned fistula in a patient with a difficult airway.