bluuebunny/crossref_metadata_2025 huggingface dataset:
Hydrological evaluation of high-resolution precipitation estimates from the WRF model in the Third Pole river basins
Authors: Sun He , Su Fengge , He Zhihua , Ou Tinghai , Chen Deliang , Li Zhenhua , Li Yanping
Published: June 2021

In this study, two sets of precipitation estimates based on the regional Weather Research and Forecasting model (WRF) –the high Asia refined analysis (HAR) and outputs with a 9 km resolution from WRF (WRF-9km) are evaluated at both basin and point scales, and their potential hydrological utilities are investigated by driving the Variable Infiltration Capacity (VIC) large-scale land surface hydrological model in seven Third Pole (TP) basins. The regional climate model (RCM) tends to overestimate the gauge-based estimates by 20–95% in annual means among the selected basins. Relative to the gauge observations, the RCM precipitation estimates can accurately detect daily precipitation events of varying intensities (with absolute bias < 3 mm). The WRF-9km exhibits a high potential for hydrological application in the monsoon-dominated basins in the southeastern TP (with NSE of 0.7–0.9 and bias of -11% to 3%), while the HAR performs well in the upper Indus (UI) and upper Brahmaputra (UB) basins (with NSE of 0.6 and bias of -15% to -9%). Both the RCM precipitation estimates can accurately capture the magnitudes of low and moderate daily streamflow, but show limited capabilities in flood prediction in most of the TP basins. This study provides a comprehensive evaluation of the strength and limitation of RCMs precipitation in hydrological modeling in the TP with complex terrains and sparse gauge observations.
Evaluation of a land-atmosphere coupling metric computed from a ground-based infrared interferometer
Authors: Wakefield Ryann A. , Turner David D. , Basara Jeffrey B.
Published: June 2021

Land-atmosphere feedbacks are a critical component of the hydrologic cycle. Vertical profiles of boundary layer temperature and moisture, together with information about the land surface, are used to compute land-atmosphere coupling metrics. Ground based remote sensing platforms, such as the Atmospheric Emitted Radiance Interferometer (AERI), can provide high temporal resolution vertical profiles of temperature and moisture. When co-located with soil moisture, surface flux, and surface meteorological observations, such as at the Atmospheric Radiation Measurement (ARM) Southern Great Plains (SGP) site, it is possible to observe both the terrestrial and atmospheric legs of land-atmosphere feedbacks. In this study, we compare a commonly used coupling metric computed from radiosonde-based data to that obtained from the AERI to characterize the accuracy and uncertainty in the metric derived from the two distinct platforms. This approach demonstrates the AERI’s utility where radiosonde observations are absent in time and/or space. Radiosonde and AERI based observations of the Convective Triggering Potential and Low-Level Humidity Index (CTP-HIlow) were computed during the 1200 UTC observation time and displayed good agreement during both 2017 and 2019 warm seasons. Radiosonde and AERI derived metrics diagnosed the same atmospheric preconditioning based upon the CTP-HIlow framework a majority of the time. When retrieval uncertainty was considered, even greater agreement was found between radiosonde and AERI derived classification. The AERI’s ability to represent this coupling metric well enabled novel exploration of temporal variability within the overnight period in CTP and HIlow. Observations of CTP-HIlow computed within a few hours of 1200 UTC were essentially equivalent, however with greater differences in time arose greater differences in CTP and HIlow.
Involving, Countering, and Overlooking Stakeholder Networks in Soft Regulation: Case Study of a Small-to-Medium-Sized Enterprise’s Implementation of SA8000
Authors: Abboubi Manal El , Pinnington Ashly H. , Clegg Stewart R. , Nicolopoulou Katerina
Published: June 2021

To achieve effective stakeholder governance in the context of international social accountability certification (SA8000) requires constructing a network of agreement. In a case study of a small-to-medium-sized enterprise (SME), we examine managers’ attempts at enrolling participants in the supply chain to investigate how they strive to engage these stakeholders. We adopt actor-network theory (ANT) and sensemaking theory to develop a novel approach to understanding social accountability (SA) standards’ certification in stakeholder networks. We argue that the design and operation of any SA standard across a network requires not only attempts at enrolling other participants in the supply chain but management contextualizing and problematizing the terms of their involvement.
Book review: Pawan Agarwal, Indian Higher Education: Envisioning the Future
Authors: Kamala Kandi
Published: June 2021

Pawan Agarwal, Indian Higher Education: Envisioning the Future. New Delhi: SAGE Publications, 2009, 480 pp., ₹895.00.
Innovative work behaviors and networking across government
Authors: Demircioglu Mehmet Akif , Hameduddin Taha , Knox Colin
Published: June 2021

Public organizations have long faced pressures to become more innovative and entrepreneurial. This has been accompanied by a shift from traditional bureaucratic structures toward public management networks, both in scholarship and practice. We use the example of the Australian public service and its emphasis on increased networking to examine whether increased networking behavior is associated with greater innovative work behaviors. In developing our theoretical model, we hypothesize that networking activities are positively related to innovative work behaviors but that too few or too many networked actors are negatively associated with innovative work behaviors. Our analysis finds that networking practices are, indeed, associated with greater levels of innovative work behaviors but that they differ between the type of stakeholders public managers engage with. In addition, we find only limited evidence of a curvilinear relationship between these two constructs. The article ends with implications for research and practice.

Points for practitioners

Public organizations around the world are under pressure to become more innovative and collaborative. This is especially the case in the Australian public service. One way to achieve innovation is to encourage innovative work behaviors. We find that increased networking by public managers is associated with higher levels of innovative work behaviors. Contrary to our hypotheses, we find limited evidence of a curvilinear relationship between networking and innovative work behaviors, that is, too little or too much networking was not associated with reduced innovative work behaviors.
Clinicians’ Experience of Collaboration in the Treatment of Suicidal Clients Within the Collaborative Assessment and Management of Suicidality Framework
Authors: Fogarty Bríd , Houghton Sharon , Galavan Eoin , O’Súilleabháin Páraic S.
Published: June 2021

Introduction

There is little known about the clinicians’ experience of collaboration using the Collaborative Assessment and Management of Suicide (CAMS) framework. This study aimed to give voice to the clinician experience.

Method

A qualitative design utilised semi-structured interviews with ten psychologists who worked in a Suicide Assessment and Treatment Service (SATS) in Ireland which utilises the CAMS framework.

Results

An Interpretative Phenomenological Analysis (IPA) approach revealed several important findings. The superordinate themes included ‘Finding Safety’, ‘Regulation of the Self’, ‘Connecting’, and ‘Systemic Challenges’.

Discussion

The CAMS framework plays an important role in providing a safe base for the clinician (in terms of understanding suicidality, in addition to the structures of the framework). It provides a mechanism in which to process difficult emotions, and a way of communicating a formulation of suicide to the treating team. Importantly, the CAMS emerged as facilitating a collaborative, therapeutic way of working.
Disrupted social integration: A case study of Shanghai’s point-seeking group
Authors: Huang Yixiong , Yang Shufei , Wang Kuiming
Published: June 2021

The development and expansion of Shanghai have attracted many labor migrants. Because the migrants hold a non-local hukou (household registration), they can only access minimal social services in urban areas. One of the reforms introduced by the local government of Shanghai is the Residential Points System (RPS), which would allow qualified migrants to access more social services. The policy has created a new social class: the “point-seeking group” (PSG), which refers to migrants who try to obtain urban social benefits through the points-earning clauses of the RPS. This study examines the integration experiences of the PSG in Shanghai. Findings from the study suggest that the PSG has encountered “disrupted social integration” in which institutional constraints pose a major barrier to the economic and social integration of first- and second-generation migrants.
Low vision: Knowledge, attitude, and practice among optometrists in India
Authors: Pandya Nidhi , Gupta Nayan , Nagpal Dimple
Published: June 2021

In a developing country like India, affordable eye care services are limited and less developed. Moreover, a general lack of awareness about proper vision care leads to a rise in the number of individuals with visual impairment. In developing countries like India, the low vision services are still growing. Hence, it becomes necessary to understand the knowledge and practice patterns among optometrists regarding low vision services. This was a cross-sectional study carried out from May 2020 to July 2020 among optometrists across India. The questionnaire was constructed using the information from the already existing literature, and content validity was done through experts in this field. Furthermore, this survey was circulated to 1374 optometrists in the form of Google survey. The participants were able to participate in the survey only after a written informed consent. Analysis was carried out using Statistical Package for the Social Sciences, Version 20.0 (SPSS, Inc., IBM), to report the knowledge, attitude, and practice of the low vision services in India. In total, 280 individuals participated in this survey, and the mean age of the participants was 28 ± 8 years. There were 156 (55.7%) females and 124 (44.3%) males with a response rate of 20.37%. Out of 280 participants, 184 (65.7%) were involved in clinical practice, whereas 96 (34.3%) in optical practice. Lack of accessibility and time were found to be the two major barriers to enhance knowledge in low vision; however, accessibility, lack of awareness, and cost were the hindering factors to practise low vision services among these participants. This study reports that accessibility to the low vision services and awareness about the services are the barriers to uptake of low vision services. Besides this awareness, training programmes and public awareness would effectively contribute to enhance low vision services.
Distance learning information literacy: Undergraduate students experience distance learning during the COVID-19 setting
Authors: Heriyanto  , Prasetyawan Yanuar Yoga , Krismayani Ika
Published: June 2021

This qualitative study provides an understanding about undergraduate students’ information literacy experience during their involvement with distance learning in an Indonesian university. Findings present evidence to inform the development of the distance learning process in Indonesia and informed learning responses that enhance the learning of undergraduate students. A total of 17 undergraduate students were interviewed using a semi-structured interview technique. The data collected were analyzed using thematic analysis, revealing four themes related to students’ information literacy experience during distance learning, namely, understanding distance learning, platform literacy, learning strategy, and learning resources. Findings can inform the development of informed learning responses to enhance the transition of undergraduate students into distance learning during a pandemic situation. These results may also be of benefit to teaching faculties for enhancing teaching and learning activities and to provide support for students.
Exploring the human factors for mindfulness in mHealth service usage: An Elaboration Likelihood Model
Authors: Wu Xinghan , Guo Xitong , Zhu He
Published: June 2021

MHealth service is widely accepted as a good path towards healthcare promotion. However, patients’ low-level usage restricted its effectiveness. This work draws upon the elaboration likelihood model and mindfulness theory to investigate the mindfulness mechanism in mHealth service usage, which highlights: First, both perceived information quality and mindfulness positively affect mHealth service usage. Also, perceived information quality is observed to affect the establishment of mindfulness positively. These findings stress that both perceived information quality and mindfulness are essential for mHealth service usage. Second, peer patient influence and physicians’ recommendations positively affect the establishment of mindfulness. These findings stress that human factors are essential for consumers’ establishment of mindfulness. Third, mindfulness mediates the relationship between human factors and mHealth service usage. This phenomenon indicates that when consumers adopt a mHealth service, both peer patient influence and physicians’ recommendations have a positive impact on mHealth service usage indirectly. Fourth, the effects of both peer patient influence and physicians’ recommendations on mindfulness depend on patients’ perceived eHealth literacy levels. This finding illustrates that while peer patient influence is especially crucial for improving mindfulness in a cohort with a high-level perceived eHealth literacy, physicians’ recommendations are especially crucial for improving mindfulness in a cohort with low-level perceived eHealth literacy.
Role of digital tomosynthesis in the context of tuberculosis contact investigation: comparisons with digital radiography
Authors: Mok Jeongha , Yeom Jeong A , Nam Su Won , Yoo Jun Mi , Lee Ji Won , Lee Geewon , Kim Kun-Il , Jeong Yeon Joo
Published: June 2021

Background

Chest radiography value as a screening tool in those exposed to pulmonary tuberculosis (TB) is reduced by its lower sensitivity to detect small intrapulmonary lesions.

Purpose

To evaluate the efficacy of digital tomosynthesis (DTS) screening of individuals that had contacted persons with active TB using low-dose computed tomography (CT) as the reference standard methods.

Material and Methods

This retrospective, community-based screening study of 90 adults who had been in close contact with a TB case was undertaken at our institution. All individuals underwent clinical evaluation, digital radiography (DR), DTS, and low-dose chest CT. Observers assessed and classified DR and DTS images using CT as the reference-standard method. Based on clinical and imaging findings, TB status was classified as normal, latent, minimal, subclinical, and active. Diagnostic performances of DTS and DR for the interpretation of correct diagnosis were calculated.

Results

The estimated effective doses for DR, DTS, and low-dose CT were 0.01 mSv, 0.1 mSv, and 0.33 mSv, respectively. TB statuses of the 90 individuals were as follows: 62 latent (68.9%); two subclinical (2.2%); and one minimal (1.1%). The sensitivities, specificities, and accuracies of DTS and DR in the interpretation of correct diagnosis were 75.8%, 100%, 91.1% and 48.5%, 96.5%, 78.9%, respectively.

Conclusion

DTS appears to be superior to DR for the detection of lung lesions in individuals with TB contacts. DTS can offer a reasonable option for TB contact investigation.
Mutations in domain V of Mycoplasma pneumoniae 23S rRNA and clinical characteristics of pediatric M. pneumoniae pneumonia in Nanjing, China
Authors: Xu Changdi , Deng Huan , Zhang Jiamin , Zhu Yifan , Rong Qiangquan , Quan Yao , Tang Heng , Zhao Deyu
Published: June 2021

Objective

To investigate the prevalence of mutations in domain V of Mycoplasma pneumoniae (MP) 23S ribosomal RNA (rRNA) and the clinical characteristics of pediatric MP pneumonia (MPP) in Nanjing, China.

Methods

Domain V of 23S rRNA was sequenced in MP strains collected from children diagnosed with MPP in Nanjing. Clinical and laboratory data were obtained.

Results

Among the 276 MP strains, 255 (92.39%) harbored mutations, primarily A2063G in domain V of MP 23S rRNA. When children were stratified according to the presence or absence of mutations, no significant differences were found in sex, age, the MP DNA load at enrollment, lymphocyte counts, pulmonary complications, immunomodulator levels, fever duration, the duration of fever after macrolide therapy, and hospital stay. The prevalence of refractory MPP in the two groups was similar. Children with refractory MPP exhibited higher MP DNA loads than those with non-refractory MPP.

Conclusions

Despite the high prevalence of the A2063G mutation in domain V of MP 23S rRNA, mutations were not associated with the clinical characteristics of MPP. The MP DNA load significantly differed between refractory and non-refractory MPP.
Arthroscopic Treatment and Outcomes of Borderline Dysplasia With Acetabular Retroversion: A Matched-Control Study From the MASH Study Group
Authors: Matsuda Dean , Kivlan Benjamin R. , Nho Shane J. , Wolff Andrew B. , Salvo John P. , Christoforetti John J. , Martin RobRoy L. , Carreira Dominic S.
Published: June 2021

Background:

Although acetabular retroversion (AR) occurs in dysplasia, management of the crossover sign (COS) or outcomes in borderline dysplasia (BD) with AR have not been reported.

Purpose:

To report any differences in the management of the COS in BD and nondysplastic hips and to report comparative outcomes of BD with AR with matched controls with BD or AR (ie, focal pincer femoroacetabular impingement [FAI]).

Study design:

Cohort study; Level of evidence, 3.

Methods:

A multicenter matched-pair study was performed with data from a large prospectively collected database. Inclusion criteria were patients who had undergone primary unilateral hip arthroscopy including labral repair for FAI and/or chondral pathology without significant osteoarthritis (ie, Tönnis grade 0 or 1). The study group (BD+AR) was defined radiographically by lateral center-edge angle (LCEA) on standing anteroposterior pelvis of 18° to 25° and positive COS. A 1:1:1 matching on age, sex, and body mass index was performed with a control group with BD and another control group with AR (LCEA, >25°+COS). Acetabuloplasty rates were determined for each group. Mean 2-year outcomes including the 12-Item International Hip Outcome Tool (iHOT-12), minimally clinical important difference (MCID), substantial clinical benefit (SCB), and Patient Acceptable Symptom State (PASS) scores were compared. Subanalysis of the study group both with and without acetabuloplasty was performed.

Results:

There were 69 patients, with 23 in the study group and 23 in each control group. The effect of dysplasia with or without the presence of the COS resulted in changes in acetabuloplasty rates, with 0% performed in the BD group, 35% in the BD+AR study group, and 91% in the AR group ( P = .001). Arthroscopic outcomes demonstrated similar and significant mean 2-year improvement of iHOT-12 patient-reported outcomes, MCID, SCB, and PASS scores in the study and both control groups. There was a trend within the study group toward greater postoperative iHOT-12 scores in patients who received anterior-based acetabuloplasty than those who did not receive acetabuloplasty (81.7 and 70.4, respectively; P = .11).

Conclusion:

Acetabular coverage influences the management of the COS, with significantly lower acetabuloplasty rates in BD with AR compared with AR without BD (focal pincer impingement). Symptomatic patients with combined BD and AR had similar significant successful outcomes to those of patients with BD and those with AR (focal pincer impingement), whether treated without acetabuloplasty or, less frequently, with limited anterior-based acetabuloplasty.
Working with the trauma of racism in groups in a time of white supremacy — erasure, psychic ghettoization or bearing witness
Authors: Stevenson Stuart
Published: June 2021

This article addresses the complex issues when working with group members who have been traumatized by institutional and inter-generational racism in the context of white supremacy. The article engages with how a group analytic understanding can assist clinicians to engage with group members who have experienced racial trauma and structural oppression when these dynamics are inevitably generated in psychotherapy groups. I discuss the concepts of ‘erasure’, ‘bearing witness’ and also introduce the concept of ‘psychic ghettoization’, which can provide the conductor with some conceptual tools to manage the complex issue of racial trauma. I argue that there is now more than ever a need to remain relevant to the diverse and often marginalized communities we serve. To do this requires group analysts and indeed all clinicians to urgently scrutinize and develop theories and techniques for working with racism in our practices and clinics. A lack of intervention equates to a by-standing and a complicit collusion with racism which risks a re-traumatizing dynamic being paralleled in our clinical work with group members from marginalized communities.
Normative Sexual Health Development in Non-Normative Circumstances: Exploring Healthy Intimate Relationships Among Young People in Foster Care
Authors: Diamant-Wilson Roni , Williams Jo
Published: June 2021

While the sexual health risks among young people of color in foster care have been well-documented, healthy sexual development in this population has been less examined. The current study explored the experiences of Black youth in foster care and the factors that influenced their safer sex practices. Qualitative interviews were conducted with 18 sexually active Black participants (18–22 years old) in foster care from a large, Midwestern city in the United States. Grounded theory methods were used to (a) construct a conceptual framework illustrating the conditions the youth experienced that influenced their safer sex efforts, and (b) describe different types of intimate relationships that reflected their sexual health practices. Using specific strategies, the majority of the youth overcame obstacles and participated in positive sexual health practices. More than half (59%) reported they were in an intimate relationship for at least 6 months and either abstained from sex, used condoms 100% of the time, or employed safer sex methods. The findings suggest Black youth in state care can engage in positive sexual health practices and form healthy intimate relationships.
Managing healthcare services: Are professionals ready to play the role of manager?
Authors: Fanelli Simone , Pratici Lorenzo , Zangrandi Antonello
Published: June 2021

Health professionals are now required to develop skills that help them to achieve better organizational performance, in addition to the skills necessary to carry out their professional activities. The role of clinician-manager has thus grown rapidly in all the main industrialized countries. The purpose of this study is to investigate how healthcare professionals perceive their level of preparation in managerial skills. Analysing literature on managerial skills in the health sector, ten domains of skills emerged and were used to construct a questionnaire. A survey analysis was conducted among professionals from health organizations in two Italian regions. Independent t-tests were conducted and a one-way analysis of variance was performed in order to compare the self-assessment competency levels in selected subgroups of participants. Findings show that healthcare professionals feel sufficiently prepared in all managerial areas identified. However, they also suggest that health organizations should invest more in all managerial areas. Differences between self-perception of competence and need for training occur among managers and non-managers. The findings will be useful for top management and policy makers designing operational tools for intervention in human resource development, with the aim of providing appropriate training and skills for clinician-managers.
Effect of Process Parameters on Mechanical Properties of Aluminum Composite Foam Developed by Friction Stir Processing
Authors: Rathore Sachin , Singh Ratnesh Kumar Raj , Khan Kunwar Laiq Ahmad
Published: June 2021

The underwater friction stir processing is used for development of aluminum metal matrix composite (AA2219-Y2O3) foam. For development of foam, holes with different diameter in the mid thickness of plate were filled with a mixture of TiH2 and aluminum powder and underwater friction stir processing was used to mix this mixture in aluminum metal matrix composite. Then precursors extracted from the processed zone and heated upto 650°C in a furnace for development of foam. The effect of diameter of hole, number of passes and the tool rotation direction has been studied on the foam cell size and static and dynamic compressive behavior of the foam. It is found that as the diameter of hole increases, the size of pores increases. The distribution of pores is better with higher number of passes and increasing the hole diameter. The quality of foam further improves by reversing the tool rotation direction. The developed foam has different pore size varies from 0.7 to 2.7 mm depends on the FSP parameters. Based on the size of pores and their distribution the relative density ranges from 0.1 to 0.78. The foam produced with 4 mm hole diameter has best static and dynamic compression properties.
Data-driven process control for manufacturing spiral bevel and hypoid gears by using design for six sigma (DFSS) considering numerical loaded tooth contact analysis (NLTCA)
Authors: Rong Kaibin , Ding Han , Song Biyun , Gao Jinhao , Tang Jinyuan
Published: June 2021

Data-driven process control considering both geometric and loaded contact performance evaluations has been an increasingly important stage in field of spiral bevel and hypoid gears. A new data-driven manufacturing process control strategy is proposed for a high performance spiral bevel and hypoid gears. Here, to distinguish with the conventional simulated loaded tooth contact analysis (SLTCA) using economical finite element software package, the numerical loaded tooth contact analysis (NLTCA) is of more flexibility and practicality. In light of the advantages of the improved design for six sigma (DFSS), it is integrated with NLTCA for establishing a novel data-driven process control of gear manufacturing. Firstly, in improved DFSS framework, quality function deployment (QFD) is used to determine four sub-objective high-performance evaluation items. Then, their data-driven relationships between machine settings are respectively determined by using NLTCA. In particular, the manufacturing process control is further converted into multi-objective optimization (MOO) modification of the hypoid generator settings. Finally, an interactive preference point approach is applied for data-driven control of its iterative step and it can obtain a robust solution from Pareto optimal front. A case study is provided to verify the proposed methodology.
Effectiveness study in shell and tube heat exchanger at various concentrations of CuO nanofluid for parallel flow
Authors: Sameer Syed , Prakash SB , Narayana Swamy G
Published: June 2021

Nanoparticles enhances the heat transfer between particles and the fluids due to their high specific surface area and adjustable properties, including thermal conductivity and surface wettability, by varying particle volume concentrations in the base fluid to suit different applications. This article is an experimental study on the effectiveness and overall heat transfer coefficient in STHE (shell and tube heat exchanger), comprising baffle cut 25% with a nanofluid at 0.05, 0.1, and 0.2 percentage concentrations of CuO nanoparticles in the DW (distilled water) base-fluid. The inclusion of 0.15% SDBS (Sodium dodecyl-benzene sulphonate) by a two-step method as a surfactant improves the stability of dispersed CuO nanoparticles. The CuO/DW nanofluid thermo-physical properties such as thermal conductivity (k), density (ρ), and dynamic viscosity (μ), have increased. However, the nanofluid's specific heat (Cp) reduces as the nanoparticles proportion rises in the DW base fluid. There is an enhancement of the overall heat transfer coefficient and effectiveness compared to water during parallel flow variation. The maximum heat exchanger effectiveness was 3.01%, 4.01%, and 5.94% higher than water at 0.6 lpm mass flow rate and temperature T = 80 °C for volume fractions of 0.05, 0.1, and 0.2 percentage of CuO/DW nanofluid respectively during parallel flow.
Vibration reduction performance of an innovative vehicle seat with a vibration absorber and variable damping cushion
Authors: Gao Pu , Liu Hui , Xiang Changle , Yan Pengfei
Published: June 2021

Road driving conditions are complicated, and road unevenness and speed bumps are main sources of vibration that cause the discomfort of passengers in vehicles. The vehicle seat can effectively reduce the system damage and human discomfort caused by this vibration. In this paper, an innovative damping seat that combines a vibration absorber and variable damping cushion is proposed for better vibration reduction performance under different external road excitations. A practical vertical human-seat-vehicle model is established, and uneven road excitation considering trapezoidal speed bumps and rectangular speed bumps is applied to the vertical model. The vibration reduction mechanisms of four different seats (without the absorber and variable damping cushion, with the absorber, with the variable damping cushion and with the new damping seat) are studied by comprehensive time-frequency analysis of the vibration responses. A comparison verifies the improved vibration damping performance of the newly proposed scheme, providing good theoretical guidance for the development of damping seats.
Blunt hub affecting the radar cross section of rotor based on dynamic scattering method
Authors: Zhou Zeyang , Huang Jun , Chen Chen , Zhang Jiaren
Published: June 2021

In order to study the radar characteristics of blunt-hub rotor, a dynamic scattering method (DSM) based on physical optics and physical theory of diffraction is presented. Important influencing factors are analyzed and discussed, including rotor disk inclination, azimuth, elevation angle, and radar wave frequency. The radar cross section (RCS) of the blunt-hub rotor is used for comparison with conventional-hub rotor and sharp-hub rotor. The RCS performance of the blunt-hub rotor at different radar wave frequencies is close to that of the sharp-hub rotor. At larger positive elevation angles, the RCS∼azimuth performance of the blunt-hub rotor is not as good as the other two rotors, while the RCS performance of the blunt-hub rotor has an advantage under the larger negative elevation angle and the inclination of the rotor disk. The presented DSM is feasible and effective for learning the electromagnetic scattering characteristics of the blunt-hub rotor.
A new Holocene sea-level record for Singapore
Authors: Chua Stephen , Switzer Adam D , Li Tanghua , Chen Huixian , Christie Margaret , Shaw Timothy A , Khan Nicole S , Bird Michael I , Horton Benjamin P
Published: June 2021

Relative sea-level (RSL) records from far-field regions distal from ice sheets remain poorly understood, particularly in the early Holocene. Here, we extended the Holocene RSL data from Singapore by producing early Holocene sea-level index points (SLIPs) and limiting dates from a new ~40 m sediment core. We merged new and published RSL data to construct a standardized Singapore RSL database consisting of 88 SLIPs and limiting data. In the early Holocene, RSL rose rapidly from −21.0 to −0.7 m from ~9500 to 7000 cal. yrs. BP. Thereafter, the rate of RSL rise decelerated, reaching a mid-Holocene highstand of 4.0 ± 4.5 m at 5100 cal. yrs. BP, before falling to its present level. There is no evidence of any inflections in RSL when the full uncertainty of SLIPs is considered. When combined with other standardized data from the Malay-Thai Peninsula, our results also show substantial misfits between regional RSL reconstructions and glacial isostatic adjustment (GIA) model predictions in the rate of early Holocene RSL rise, the timing of the mid-Holocene highstand and the nature of late-Holocene RSL fall towards the present. It is presently unknown whether these misfits are caused by regional processes, such as subsidence of the continental shelf, or inaccurate parameters used in the GIA model.
Up-regulation of CTRP12 ameliorates hypoxia/re-oxygenation-induced cardiomyocyte injury by inhibiting apoptosis, oxidative stress, and inflammation via the enhancement of Nrf2 signaling
Authors: Jin Ai-Ping , Zhang Qian-Rong , Yang Cui-Ling , Ye Sha , Cheng Hai-Juan , Zheng Yuan-Yuan
Published: June 2021

C1q/TNF-related protein 12 (CTRP12) has been reported to play a key role in coronary artery disease. However, whether CTRP12 plays a role in the regulation of myocardial ischemia-reperfusion injury is not fully understood. The goals of this work were to assess the possible relationship between CTRP12 and myocardial ischemia-reperfusion injury. Here, we exposed cardiomyocytes to hypoxia/re-oxygenation (H/R) to establish an in vitro cardiomyocyte injury model of myocardial ischemia-reperfusion injury. Our results showed that H/R treatment resulted in a decrease in CTRP12 expression in cardiomyocytes. The up-regulation of CTRP12 ameliorated H/R-induced cardiomyocyte injury via the down-regulation of apoptosis, oxidative stress, and inflammation. In contrast, the knockdown of CTRP12 enhanced cardiomyocyte sensitivity to H/R-induced cardiomyocyte injury. Further investigation showed that CTRP12 enhanced the levels of nuclear Nrf2 and increased the expression of Nrf2 target genes in cardiomyocytes exposed to H/R. However, the inhibition of Nrf2 markedly diminished CTRP12-overexpression-mediated cardioprotective effects against H/R injury. Overall, these data indicate that CTRP12 protects against H/R-induced cardiomyocyte injury by inhibiting apoptosis, oxidative stress, and inflammation via the enhancement of Nrf2 signaling. This work suggests a potential role of CTRP12 in myocardial ischemia-reperfusion injury and proposes it as an attractive target for cardioprotection.
Going Feminine: Identifying How and When Female Candidates Emphasize Feminine and Masculine Traits on the Campaign Trail
Authors: Bauer Nichole M. , Santia Martina
Published: June 2021

Female candidates face a messaging challenge. There is a strong association between masculinity and political leadership. Stressing masculinity can result in a likability backlash for female candidates often seen as lacking feminine qualities, such as warmth. Preventing a likability backlash by highlighting feminine qualities can also harm female candidates. Current scholarship offers conflicting conclusions about how female candidates balance these gendered challenges. We fill this empirical and theoretical gap with a trait-balancing theory clarifying how and when female candidates use feminine and masculine traits to manage competing expectations. We use original data merging information on candidate advertising strategies across three election cycles. We show that female candidates strategically balance masculine and feminine stereotypes in ways that often differ from their male counterparts but also differ based on female candidate partisanship and incumbency. These results are consequential because they highlight how female candidates manage gendered pressures in campaign strategies, which can affect their ability to win elections and, ultimately, women’s representation in government.
Characterizing Underlying Cognitive Components of ADHD Presentations and Co-morbid Diagnoses: A Diffusion Decision Model Analysis
Authors: Ging-Jehli Nadja R. , Arnold L. Eugene , Roley-Roberts Michelle E. , deBeus Roger
Published: June 2021

Objective:

To Explore whether subtypes and comorbidities of attention-deficit hyperactivity disorder (ADHD) induce distinct biases in cognitive components involved in information processing.

Method:

Performance on the Integrated Visual and Auditory Continuous Performance Test (IVA-CPT) was compared between 150 children (aged 7 to 10) with ADHD, grouped by DSM-5 presentation (ADHD-C, ADHD-I) or co-morbid diagnoses (anxiety, oppositional defiant disorder [ODD], both, neither), and 60 children without ADHD. Diffusion decision modeling decomposed performance into cognitive components.

Results:

Children with ADHD had poorer information integration than controls. Children with ADHD-C were more sensitive to changes in presentation modality (auditory/visual) than those with ADHD-I and controls. Above and beyond these results, children with ADHD+anxiety+ODD had larger increases in response biases when targets became frequent than children with ADHD-only or with ADHD and one comorbidity.

Conclusion:

ADHD presentations and comorbidities have distinct cognitive characteristics quantifiable using DDM and IVA-CPT. We discuss implications for tailored cognitive-behavioral therapy.
Reimagining academic conferences: Toward a federated model of conferencing
Authors: Etzion Dror , Gehman Joel , Davis Gerald F
Published: June 2021

What should the post-COVID conference look like? In our attempt to answer this question, we first describe the primary functions and affordances of conferences. Our frank appraisal reveals the breadth of reasons why academics attend conferences, and how conference attendance often blends personal and professional motivations. We also elaborate some of the shortcomings of in-person conferences, spanning personal, professional, and societal concerns. Recent alternative (virtual) formats for convening scholars provide means for alleviating some of these shortcomings, but do not seem entirely up to the task of providing a fully satisfactory solution to all that conferencing can be. Moreover, we extrapolate from prior history and ongoing trends to predict that technological solutionism to conferencing is likely to unleash both positive and negative dynamics, some of which will exacerbate current ills in our profession. We then sketch out a values-based approach that can serve as a basis for reimagining academic conferences. This vision promotes a federated model of conferencing, grounded in principles of inclusion, diversity, community, and environmental stewardship.
Impact of chronic kidney disease on hemoglobin among patients with peripheral artery disease treated with P2Y12 inhibitors: Insights from the EUCLID trial
Authors: Hsia Judith , Kavanagh Sarah T , Hopley Charles W , Baumgartner Iris , Berger Jeffrey S , Fowkes Gerry R , Jones W Schuyler , Mahaffey Kenneth W , Norgren Lars , Patel Manesh R , Rockhold Frank , Blomster Juuso , Katona Brian G , Hiatt William R , Bonaca Marc P
Published: June 2021

Patients with chronic kidney disease may develop new or more severe anemia when treated with antiplatelet agents due to blood loss in conjunction with impaired erythropoiesis. Because anemia independently predicts limb amputation and mortality among patients with peripheral artery disease (PAD), we evaluated the relationship between estimated glomerular filtration rate (eGFR) and hemoglobin (Hb) levels in the EUCLID trial in which patients with symptomatic PAD were randomized to ticagrelor or clopidogrel. At baseline, 9025, 1870, and 1000 patients had eGFR ⩾ 60, 45–59, and < 45 mL/min/1.73 m2, respectively. The mean fall in Hb during the trial was 0.46 ± 1.68 g/dL and did not differ by baseline eGFR category, although Hb fall ⩾ 10% was more frequent among patients with lower eGFR ( p for trend < 0.0001). On-study treatment with iron, erythropoiesis-stimulating agents, and/or red blood cell transfusion was reported for 479 (5.3%), 165 (8.8%), and 129 (12.9%) patients in the three eGFR categories, respectively ( p for trend < 0.0001). After adjustment for baseline and post-randomization effects, those not receiving anemia treatment had a smaller reduction in Hb from baseline than those receiving anemia treatment ( p < 0.0001). Other determinants of Hb reduction included absence of on-study myocardial infarction, coronary or peripheral revascularization, residence outside North America, male sex, and baseline eGFR. We conclude that among patients with PAD treated with P2Y12 inhibitors, lower baseline eGFR was associated with a greater reduction in Hb. ClinicalTrials.gov Identifier: NCT01732822
Online social environments and their impact on video viewers: The effects of user comments on entertainment experiences and knowledge gain during political satire consumption
Authors: Möller Anne Marthe , Boukes Mark
Published: June 2021

Political satire is often consumed on online platforms (e.g. YouTube) and the effects of its consumption may be highly conditional on the user comments that are surrounding it. By manipulating the valence of comments (positive vs negative) and the focus of these comments (hedonic entertainment value vs eudaimonic entertainment value vs informative value), this pre-registered experiment investigates how user comments affect satire viewers’ hedonic entertainment experiences, their eudaimonic entertainment experiences, and their knowledge gain. Analyses showed that the valence of comments congruently affected viewers’ hedonic entertainment experiences, eudaimonic entertainment experiences, and subjective knowledge gain, but not their objective knowledge gain. In addition, the focus of user comments affected eudaimonic entertainment experiences and knowledge gain regardless of comments’ valence. This study’s findings advance our understanding of how viewers are affected when they consume media content that is surrounded by the comments of other viewers.
The educational journey of former foster youth: A dream deferred
Authors: Yang Jessica L , Bechtold Sarah
Published: June 2021

This qualitative study explored the educational needs and experiences of 27 adults who were between the ages of 30 and 50 but emancipated from foster care as youth. This study employed an interpretive phenomenological approach to understanding the narratives of the participants to gain deeper insight into the supports and barriers in obtaining a post-secondary education.

Findings

Key findings from this study are that the majority of emancipated youth desire to obtain a post-secondary education but developmental difficulties such as an incomplete transition into emerging adulthood, lack of knowledge about post-secondary education, and lack of financial resources prevent matriculation into higher education. However, later in life, many emancipated youths are able to return to a post-secondary institution and graduate with a bachelor’s degree or higher. The primary supportive factor is a positive relationship and additional developmental maturity afforded by time.

Applications

Implications of these findings are that those serving emancipating youth need to employ a developmental biopsychosocial perspective in assisting these youth. Both ensuring their healthy development and maturation but also helping to remove logistical barriers to ensure the ability of these youth to obtain a post-secondary education.
A two-step method for delamination detection in composite laminates using experience-based learning algorithm
Authors: Zheng Tongyi , Luo Weili , Tong Huawei , Liang Xing
Published: June 2021

Delamination in composite laminates reduces the structural stiffness and thus causes changes in the vibration responses of the laminates. Therefore, it is feasible to employ dynamic characteristics (such as natural frequencies and mode shapes) for delamination detection by using an optimization method. In the present study, a two-step method is proposed for the delamination detection in composite laminates using an experience-based learning algorithm. In the first step, one-dimensional equivalent through-thickness beam elements are employed to model the composite laminated beam and potential delamination locations are identified. In the second step, a typical three-dimensional finite mesh is utilized for the beam’s modeling and the detailed delamination information (including the delamination location, size, and interface layer) is detected. This two-step method combines the advantages of the two different modeling techniques and is able to significantly reduce the computational cost without reducing detection accuracy. The proposed method is applied for an eight-layer quasi-isotropic symmetric (0/-45/45/90)s composited beam with different delamination situations to verify its effectiveness and robustness. The performance of the two-step method is demonstrated by comparing with the one-step method and other three state-of-the-art algorithms (CMFOA, PSO, and SSA). Moreover, the influence of artificial noise on the accuracy of the detection performance is also investigated. Both numerical and experimental results confirm the superiority of the proposed method for delamination detection in composite laminates especially for the prediction of delamination interface.
Continuous missing data imputation with incomplete dataset by generative adversarial networks–based unsupervised learning for long-term bridge health monitoring
Authors: Jiang Huachen , Wan Chunfeng , Yang Kang , Ding Youliang , Xue Songtao
Published: June 2021

Wireless sensors are the key components of structural health monitoring systems. During the signal transmission, sensor failure is inevitable, among which, data loss is the most common type. Missing data problem poses a huge challenge to the consequent damage detection and condition assessment, and therefore, great importance should be attached. Conventional missing data imputation basically adopts the correlation-based method, especially for strain monitoring data. However, such methods often require delicate model selection, and the correlations for vehicle-induced strains are much harder to be captured compared with temperature-induced strains. In this article, a novel data-driven generative adversarial network (GAN) for imputing missing strain response is proposed. As opposed to traditional ways where correlations for inter-strains are explicitly modeled, the proposed method directly imputes the missing data considering the spatial–temporal relationships with other strain sensors based on the remaining observed data. Furthermore, the intact and complete dataset is not even necessary during the training process, which shows another great superiority over the model-based imputation method. The proposed method is implemented and verified on a real concrete bridge. In order to demonstrate the applicability and robustness of the GAN, imputation for single and multiple sensors is studied. Results show the proposed method provides an excellent performance of imputation accuracy and efficiency.