bluuebunny/crossref_metadata_2025_split huggingface dataset:
Perceptions of risk of SARS-CoV-2 transmission in social and educational activities by infectious diseases and general pediatric healthcare providers, a pre-vaccine risk perception cross-sectional survey
Authors: Janowski Andrew B. , Polgreen Philip M. , Beekmann Susan E. , Newland Jason G. 
Published: February 2022

Background
The perception of the transmission risks of SARS-CoV-2 in social and educational settings by US healthcare providers have not been previously quantified.

Methods
Respondents completed an online survey between September and October 2020 to estimate the risk of SARS-CoV-2 transmission on a scale of 0–10 for different social and educational activities prior to the availability of the SARS-CoV-2 vaccines. Demographic information and experiences during the pandemic were also collected. The risk assessment was emailed to three listservs of healthcare providers, including national listservs of pediatric (PID) and adult infectious diseases (AID) providers, and a listserv of general pediatric practitioners in the St Louis, USA metropolitan area.

Results
Respondents identified the highest risk of SARS-CoV-2 transmission in spending time in a bar, eating at a restaurant, and attending an indoor sporting event. In the school setting, lower risk was identified in elementary and daycare students compared to high school or university-level students. Comparatively, the risk of transmission to students and teachers was lower than the identified high-risk social activities. Factors increasing risk perception in social activities included the absence of children in the respondent’s household and female gender. For the school setting, AID providers perceived greater risk compared to PID providers or pediatric practitioners.

Conclusions
Respondents identified high risk activities that were associated with a high density of participants in an indoor space where masks are removed for eating and drinking. Differences were apparent in the school setting where pediatric providers perceived lower risks when compared to adult providers.
Practice and determinants of emergency contraceptive utilization among women seeking termination of pregnancy in Northwest Ethiopia—A mixed quantitative and qualitative study
Authors: Tenaw Lebeza Alemu 
Published: February 2022

Background
Emergency contraceptives are used within 72 hours after unprotected sexual intercourse to prevent unwanted pregnancy. Although emergency contraceptives are widely available in Ethiopia, termination of pregnancy remains a public health problem indicating low uptake of emergency contraceptives after unprotected sexual intercourse. This study aimed to assess utilization and determinants of emergency contraceptives among women seeking termination of pregnancy in Northwest Ethiopia.

Methods
An institutional-based cross-sectional study was carried out, supplemented by phenomenologically approached in-depth interviews. Systematic random sampling was used to select study participants. A structured questionnaire and an in-depth interview guide were used to collect data. Data were entered by EPI-info and analyzed through SPSS version 23 to conduct logistic regressions. Thematic analysis was used to conduct qualitative interpretation.

Results
Almost one-fifth (78; 19.2%) of the study participants used emergency contraceptives to prevent their index pregnancy. Women who had secondary education (aOR 3.28; 95% CI 1.59, 6.79) and women who had no living children (aOR 4.52; 95% CI 1.40, 14.57) had a positive significant association with emergency contraceptive utilization. On the other hand, women who did not discuss contraceptives with their sexual partner (aOR 0.49; 95% CI 0.27–0.91) and women without a history of abortion (aOR 0.45; 95% CI 0.24–0.97) had a negative significant association with emergency contraceptive utilization.

Conclusion and recommendation
There is relatively low utilization of emergency contraception among pregnancy terminating women. Reproductive health programs should encourage women discussion with their partners about emergency contraceptives to decrease occurrence of unwanted pregnancy and termination of pregnancy.
Trajectory analyses in insurance medicine studies: Examples and key methodological aspects and pitfalls
Authors: Serra Laura , Farrants Kristin , Alexanderson Kristina , Ubalde Mónica , Lallukka Tea 
Published: February 2022

Background
Trajectory analyses are being increasingly used in efforts to increase understanding about the heterogeneity in the development of different longitudinal outcomes such as sickness absence, use of medication, income, or other time varying outcomes. However, several methodological and interpretational challenges are related to using trajectory analyses. This methodological study aimed to compare results using two different types of software to identify trajectories and to discuss methodological aspects related to them and the interpretation of the results.

Methods
Group-based trajectory models (GBTM) and latent class growth models (LCGM) were fitted, using SAS and Mplus, respectively. The data for the examples were derived from a representative sample of Spanish workers in Catalonia, covered by the social security system (n = 166,192). Repeatedly measured sickness absence spells per trimester (n = 96,453) were from the Catalan Institute of Medical Evaluations. The analyses were stratified by sex and two birth cohorts (1949–1969 and 1970–1990).

Results
Neither of the software were superior to the other. Four groups were the optimal number of groups in both software, however, we detected differences in the starting values and shapes of the trajectories between the two software used, which allow for different conclusions when they are applied. We cover questions related to model fit, selecting the optimal number of trajectory groups, investigating covariates, how to interpret the results, and what are the key pitfalls and strengths of using these person-oriented methods.

Conclusions
Future studies could address further methodological aspects around these statistical techniques, to facilitate epidemiological and other research dealing with longitudinal study designs.
Differences in the frequency of subjective geriatric complaints along with aging and their associations with physical function, multimorbidity, and mood: A cross-sectional study
Authors: Takechi Hajime , Tsuzuki Akira , Matsumoto Komaki , Fukui Akane , Kawakita Hitomi , Yoshino Hiroshi , Kanada Yoshikiyo 
Published: February 2022

BackgroundIn this study, we investigated subjective geriatric complaints (SGCs) as conditions regarding health concerns in community-dwelling older people and analyzed their frequencies with aging and relationships with other factors.MethodsThis cross-sectional study enrolled 10,434 older people living in a community with a representative aging population in Japan. A questionnaire was sent by mail to those who had not applied for formal care needs certification. The presence of and concern for symptoms common in old age were asked as SGCs, as were physical function levels, multimorbidity, and depression. Categorical principal component analysis (CATPCA) of the symptoms was performed, and the association between the obtained components and other factors was analyzed.ResultsThe mean age of the participants was 73.7 ± 6.1 years, and 52.5% were women. On average, they had 1.72 ± 1.57 SGCs, which showed a gradual increase with age. The results of the CATPCA revealed four components: SGC1, excretory/circulatory/swallowing complaints; SGC2, audiovisual complaints; SGC3, neurological complaints; and SGC4, musculoskeletal complaints. All SGC components were independently associated with physical function, multimorbidity, and depression.ConclusionsEach SGC showed various frequencies and differences along with aging, and SGCs were classified into four components that were thought to share a common background. These findings could contribute to the planning of better health management strategies for older people.
The Impact of Foreign Direct Investments on Poverty Reduction in the Western Balkans
Authors: Topalli Margerita , Papavangjeli Meri , Ivanaj Silvester , Ferra Blerta 
Published: February 2022

Abstract
This article empirically examines the impact of foreign direct investment (FDI) inflows on poverty in six Western Balkan countries and also considers other country characteristics, such as the human development index (HDI), corruption, investment freedom, economic freedom, trade openness, and fertility. The work presents estimations based on a generalized method of moments (GMM) estimator for panel data models with fixed effects during the period from 2002 to 2021. Our results show that FDI has significantly contributed to poverty reduction in the Western Balkan countries. However, attention should be paid to where and how FDI takes place as these investments should be directed at the productive sectors of the economy, thus leading to a higher impact on poverty and inequality. The study also finds that policies and institutions that support a country’s economic freedom and openness are imperative for poverty reduction. In addition, poverty reduction in the Western Balkan region can be achieved through measures that contribute to the improvement of HDI and strengthen institutions to combat corruption. Nevertheless, the empirical results of the paper are subject to a number of drawbacks, such as the limited number of observations and the considerable amount of missing data, some of which is probably questionable, a phenomenon that is quite common for developing countries.
Disentangling Permanent and Transitory Monetary Shocks with a Nonlinear Taylor Rule
Authors: Lafuente Juan Ángel , Monfort Mercedes , Pérez Rafaela , Ruiz Jesús 
Published: February 2022

Abstract
This article provides an estimation method to decompose monetary policy innovations into persistent and transitory components using the nonlinear Taylor rule proposed in Andolfatto, Hendry, and Moran (2008) [Are inflation expectations rational? Journal of Monetary Economics, 55, 406–422]. To use the Kalman filter as the optimal signal extraction technique, we use a convenient reformulation for the state equation by allowing expectations to play a significant role in explaining the future time evolution of monetary shocks. This alternative formulation allows us to perform the maximum likelihood estimation for all the parameters involved in the monetary policy as well as to recover conditional probabilities of regime change. Empirical evidence on the US monetary policy making is provided for the period covering 1986-Q1 to 2021-Q2. We compare our empirical estimates with those obtained based on the particle filter. While both procedures lead to similar quantitative and qualitative findings, our approach has much less computational cost.
Simulation of cellular-dendritic solidification structures of binary alloys in three-dimensional growth using a multiparticle diffusion-limited aggregation model
Authors: Haemers T. A. M. , Rickerby D. G. , Mittemeijer E. J. 
Published: February 2022

Abstract
Solidification in binary alloy melts was simulated with two different three-dimensional models, that differ in the way the role of the solid/liquid interface energy on the solidification is expressed: either surface rearrangement or a surface curvature-dependent attachment probability was applied. In the melt, the simultaneous diffusion of all diffusing particles (atoms) was taken into account. Cellular –dendritic growth modes, as observed in practice, could be well simulated. The surface rearrangement model is essential for exhibiting details (as facetting) and the effect of the next-nearest neighbour interaction.
Suitability evaluation method of urban and rural spatial planning based on artificial intelligence
Authors: Li Xiaopeng 
Published: February 2022

Abstract
In order to realize the sustainable development of urban overall space, aiming at the increasingly serious environmental problems in the process of contemporary rapid urbanization, based on the relationship between urban and rural space and environmental capacity, a suitability evaluation method of urban and rural spatial planning based on artificial intelligence is proposed. This paper constructs the theoretical system of sustainable development evaluation of urban and rural spatial resources and uses artificial intelligence technology to reasonably select evaluation factors and standardize the evaluation indicators so as to achieve the research goal of accurately evaluating the suitability of urban and rural spatial planning. It analyzes the influencing factors of urban–rural spatial standard regional division, develops the design of the spatial planning suitability analysis system, and establishes the urban-rural spatial suitability evaluation. The scope of sustainability evaluation was extended to the level of urban and rural spatial planning and design, and the preliminary work was done to solve the problems of urban spatial structure and decision-making. The experimental results show that the planning method has high environmental adaptability and rationality.
Optimized fractional-order PID controller based on nonlinear point kinetic model for VVER-1000 reactor
Authors: Refeat Riham M. , Fahmy Rania A. 
Published: February 2022

Abstract
Nuclear reactor dynamics are nonlinear and time-varying, so the power level control is a challenging problem in nuclear power plants (NPPs) to ensure both its operation stability and efficiency. An important measure to improve the safety of the reactor core of NPP is the implementation of robust control for the core by adjusting the inserted reactivity of the control rods. Thus in the present paper, fractional-order PID (FOPID) controller is developed as it is well known for its simplicity and robustness against disturbances. A Genetic Algorithm (GA) is used to determine FOPID controller parameters to achieve the desired power level for the generation III+ reactor VVER-1000. Implementing the GA, a suitable objective function is proposed to search for the optimal FOPID parameters. The nonlinear model of the VVER-1000 nuclear reactor is presented based on the point kinetic equations with six delayed neutron groups and temperature feedback from lumped fuel and coolant temperatures. Two cases for the VVER-1000 reactor are investigated; the changes in the power loads and the control rod withdrawal that leads to reactivity disturbance. Moreover, the uncertainties that result from model parameters perturbation are added to examine the controller robustness. The simulation results show that the proposed optimized FOPID controller can track the desired power level of the VVER-1000 reactor and robustly cope with any load changes, disturbances, or any parameters uncertainties. Also, it proves the superiority of the proposed optimized FOPID controller over other PID controllers in ensuring the safe and effective operation of the VVER-1000 reactor.
Broadband photonic tensor core with integrated ultra-low crosstalk wavelength multiplexers
Authors: Brückerhoff-Plückelmann Frank , Feldmann Johannes , Gehring Helge , Zhou Wen , Wright C. David , Bhaskaran Harish , Pernice Wolfram 
Published: February 2022

Abstract
The integration of artificial intelligence (AI) systems in the daily life greatly increases the amount of data generated and processed. In addition to the large computational power required, the hardware needs to be compact and energy efficient. One promising approach to fulfill those requirements is phase-change material based photonic neuromorphic computing that enables in-memory computation and a high degree of parallelization. In the following, we present an optimized layout of a photonic tensor core (PTC) which is designed to perform real valued matrix vector multiplications and operates at telecommunication wavelengths. We deploy the well-studied phase-change material Ge2Sb2Te5 (GST) as an optical attenuator to perform single positive valued multiplications. In order to generalize the multiplication to arbitrary real factors, we develop a novel symmetric multiplication unit which directly includes a reference-computation branch. The variable GST attenuator enables a modulation depth of 5 dB over a wavelength range of 100 nm with a wavelength dependency below 0.8 dB. The passive photonic circuit itself ensures equal coupling to the main-computation and reference-computation branch over the complete wavelength range. For the first time, we integrate wavelength multiplexers (MUX) together with a photonic crossbar array on-chip, paving the way towards fully integrated systems. The MUX are crucial for the PTC since they enable multiple computational channels in a single photonic crossbar array. We minimize the crosstalk between the channels by designing Bragg scattering based MUX. By cascading, we achieve an extinction ratio larger than 61 dB while the insertion loss is below 1 dB.
Figurations of Digital Practice, Craft, and Agency in Two Mediterranean Fieldwork Projects
Authors: Batist Zachary , Masters Val , Torma Tiffany C. , Carter Michael , Ferris Neal , Huvila Isto , Ross Seamus , Dallas Costis 
Published: February 2022

AbstractArchaeological practice is increasingly enacted within pervasive and invisible digital infrastructures, tools, and services that affect how participants engage in learning and fieldwork, and how evidence, knowledge, and expertise are produced. This article discusses the collective imaginings regarding the present and future of digital archaeological practice held by researchers working in two archaeological projects in the Eastern Mediterranean, who have normalized the use of digital tools and the adoption of digital processes in their studies. It is a part of E-CURATORS, a research project investigating how archaeologists in multiple contexts and settings incorporate pervasive digital technologies in their studies. Based on an analysis of qualitative interviews, we interpret the arguments advanced by study participants on aspects of digital work, learning, and expertise. We find that, in their sayings, participants not only characterize digital tools and workflows as having positive instrumental value, but also recognize that they may severely constrain the autonomy and agency of researchers as knowledge workers through the hyper-granularization of data, the erosion of expertise, and the mechanization of work. Participants advance a notion of digital archaeology based on do-it-yourself (DIY) practice and craft to reclaim agency from the algorithmic power of digital technology and to establish fluid, positional distribution of roles and agency, and mutual validation of expertise. Operating within discourses of labour vs efficiency, and technocracy vs agency, sayings, elicited within the archaeological situated practice in the wild, become doings, echoing archaeology’s anxiety in the face of pervasive digital technology.
Beyond Metaphor: The Trinitarian Perichōrēsis and Dance
Authors: Hikota Riyako Cecilia 
Published: February 2022

Abstract
This article critically explores the question of how the image and metaphor of the Trinitarian divine dance could enhance the dialogue between theology and dance. Could this metaphor actually be a source of said dialogue? Does this idea of the Trinitarian dance really do justice either to the divine mystery of the Trinity or to dance itself? If we would like to go beyond metaphor, what further approach would be necessary? This article examines how different authors (e.g., C. S. Lewis, Paul S. Fiddes, and Catherine M. LaCugna) have used the image or metaphor of dance to describe the perichōrēsis within the Trinity as well as the creation’s perichoretic participation. This article concludes the survey by pointing out that contemporary usages of the Trinitarian dance metaphor are participating in European Christianity’s longstanding bias against dance, no matter how much they appear to appreciate it on the surface. The bias is related to Christianity’s ambivalent attitude toward the human body, despite its foundational belief that the Word became flesh. Therefore, a call to bring the lens of dance into Christian theology should be taken as nothing less than a call to eliminate this bias against the human body itself.
Structure and mechanical properties of a multilayer biomedical shaft tubing: effect of layer composition
Authors: Sadeghi Farhad , Rodriguez Jose Luis , Bonsignore Craig 
Published: February 2022

Abstract
Trilayer polymer tubes were manufactured through an extrusion process using Pebax 6333 and high density polyethylene (HDPE) as outer and inner layer, respectively. A maleic grafted linear low-density polyethylene (LLDPE) was used as the bonding layer or tie-layer. Three types of multilayer tubes were produced: (1) outer layer (Pebax) at 70% of the total wall thickness (WT), (2) outer layer at 90% of WT, and (3) outer layer at 20% of WT. The analysis of mechanical properties showed that the inner layer contributes to strength and rigidity of the tube while the outer layer provides flexibility. Melt rheology behavior for HDPE and Pebax were studied, and HDPE showed a more pronounced shear thinning behavior compared to Pebax. Orientations of the tubes were assessed using Fourier transform infrared spectroscopy (FTIR) and it was found that HDPE layer is more sensitive to molecular orientation when extruded compared to Pebax material. Melting behavior for the tubes was investigated using dynamic scanning calorimetry (DSC). The tubes showed two melting temperatures: one associated with HDPE and one with Pebax. The HDPE peak showed a specific shift to a higher melting point for tubes as a result of molecular orientation during processing. Burst and compression testing were performed on the tubes and results demonstrated that the HDPE-rich extrusion showed the highest burst pressure and compression resistance.
Microscopic colitis: an update
Authors: Fărcaș Radu A. , Grad Simona , Dumitrașcu Dan L 
Published: February 2022

Microscopic colitis (MC) is an inflammatory pathology of the bowel diagnosed predominantly in older patients. MC is a cause of chronic watery, non-bloody diarrhea, that affects the older patients, mostly women, and leads to impaired health-related quality of life. The diagnosis and treatment can be often difficult. There are three main histological subtypes: collagenous colitis, lymphocytic colitis and incomplete microscopic colitis. Because of the variable nature of this pathology, the therapeutic options should be individualized for every patient. MC has a variable course, varying from occasional symptoms to recurrent or progressive symptoms. A literature search was performed on the main databases. Data on microscopic colitis was collected and presented. This comprehensive review aims to raise awareness of this pathology while providing the latest data regarding current recommendations. General practitioners and gastroenterologists should always take microscopic colitis into consideration when diagnosing a patient with chronic diarrhea.