bluuebunny/crossref_metadata_2025 huggingface dataset:
Effects of particle size on the flotation behavior of coal slime
Authors: Lu Tianshen , Deng Zhengbin , Tang Yun , Cheng Wanli
Published: March 2023

In order to investigate the influence of particle size on the flotation behavior of coal slime, industrial analysis, elementary analysis, and particle size composition analysis were carried out on coal slime. The coal slime is divided into three sizes: −0.5 + 0.25, −0.25 + 0.074, and −0.074 mm, and full −0.5 mm particle sizes. Through contact angle measurement, wetting heat measurement, and step-by-step release test to investigate the hydrophobicity of each particle size; in addition, the flotation kinetics test of different particle sizes coal slime was also carried out. The results show that the particle size has a significant effect on the flotation behavior of fine coal slime. The medium particle size −0.25 + 0.074 mm has the best hydrophobicity, followed by −0.5 + 0.25 mm, again −0.5 mm, and finally −0.074 mm particle sizes. Use Origin software to fit six kinetic models to the test data of coal slime flotation kinetics, and analyze the maximum combustible recovery [Formula: see text], flotation rate constant (k), and correlation coefficient ([Formula: see text]) of each particle size, The results show that the first-order model with rectangular distribution of floatabilities can better describe the flotation of coal slime of each particle size.
Postdoc Identity, Jurisdictional Issues, Ideologies, and Unions: Considerations in Organizing Professionals
Authors: Rhoades Gary
Published: March 2023

This study of U.S. postdocs and unions analyzes the public discourse of national entities, a national postdoc advocacy group, and of local postdoc unions and their collective bargaining agreements. The analytical focus and findings address: (a) postdocs’ identity as “professors-in-training” or exploited employees; (b) the professional jurisdictional issues and due process rights identified as problematic and on which postdocs’ bargaining is focused; and (c) broader ideologies and social justice issues that characterize postdocs’ working conditions and that inform their mobilizing. The findings offer insights into organizing professionals in a time when their status/work is being degraded.
Association of malnutrition and main-meal- and snack-predominant intake among female adolescent students in boarding schools in Tasikmalaya, Indonesia
Authors: Hidayanti Lilik , Rahfiludin Mohammad Zen , Nugraheni Sri Achadi , Murwani Retno
Published: March 2023

Background: Balanced dietary intake is needed to prevent malnutrition which is one of the nutritional problems faced by adolescents. Aim: To study the association between predominant dietary intake and nutritional status of female adolescent students in boarding schools in Tasikmalaya, Indonesia. Method: This cross-sectional study was conducted on 323 female adolescent students residing full-time in eight boarding schools in Tasikmalaya, West Java. Students’ dietary intake was measured using the 3-non-consecutive-day 24-h recall method. The association between the predominant dietary intake and nutritional status was evaluated using binary logistic regression. Results: Of the 323 students, 59 (18.3%) were overweight/obese (OW/OB) and 102 (31.6%) had stunted growth. The predominant dietary intake in the OW/OB group was snacks, whereas, in the stunted group, it was main meals. Snack-predominant dietary intake was a risk factor for overweight and obesity ( p  =  0.008; adjusted odds ratio [AOR]: 2.276; 95% confidence interval [CI]: 1.244–4.164), but it was a protective factor against stunting ( p  =  0.008; AOR: 0.521; 95% CI: 0.322–0.842). Conclusion: The predominance of main meals and snacks as components of total dietary intake affected the nutritional status of female adolescent students living in boarding schools. Therefore, the dietary intake interventions should tailor and design the nutritional contents of main meals and snacks according to the nutritional status of the targeted individuals.
Humanitarian giftedness
Authors: Sternberg Robert J , Rodríguez-Fernández María Isabel
Published: March 2023

Humanitarian giftedness is the deployment of one’s gifts and talents in a way that, at some level, benefits humanity. Humanitarian giftedness involves sharing one’s gifts with others in a way that makes the world a better place. It is not something people are born with—they develop it in the same way other forms of expertise are developed—through a deployment of abilities as developed by deliberate practice and a focus on giving rather than just receiving. Teachers and parents can develop humanitarian giftedness by being role models, by sharing stories of humanitarian giftedness, and by encouraging it in their students. They also must discourage use of gifts for ends that harm humanity. The road to more humanitarian deployment of gifts is not through tests and other assessments, but through the development of humanitarian gifts as a learned form of expertise—as gifts not from genes, but rather from the interaction of the person with the tasks they confront and the environmental contexts in which they live.
Nietzsche, Ontology, and Foucault’s Critical Project: To Perish from Absolute Knowledge
Authors: Barzilay Aner
Published: March 2023

The phrase ‘To perish from absolute knowledge’ from Nietzsche’s Beyond Good and Evil runs like a red thread throughout Foucault’s reading of Nietzsche, spanning a period of 20 years in which Foucault continuously turned to Nietzsche as his main philosophical and methodological role model. Beginning with his first lectures on Nietzsche in the early 1950s, Foucault repeatedly alluded to this phrase as the key to Nietzsche’s philosophical critique which anticipated the philosophical shift to ontology in the 20th century. Drawing on a host of unpublished essays from Foucault’s archive, it will be shown that this phrase holds the key to Foucault’s Nietzsche interpretation and explains his reliance on historicity as the transcendental basis for his critical project. The article will rely on Foucault’s dynamic analysis of this phrase to narrate the development of his historical methodology between the 1950s and the mid-1970s, and will argue for the continuity and coherence of Foucault’s critical project.
Cross-reactivity between piperacillin–tazobactam and cefoperazone–sulbactam in drug-induced immune thrombocytopenia
Authors: He Xiaoyan , Huang Wanting , Wan Xiong , Li Xiaoya , Chang Qiuhong , Ding Ling
Published: March 2023

Beta-lactam antibiotics commonly cause immune thrombocytopenia. Cross-reactivity in patients with drug-induced immune thrombocytopenia has rarely been reported. In this study, we describe the case of a 79-year-old man who developed thrombocytopenia after receiving piperacillin–tazobactam for an acute exacerbation of chronic obstructive pulmonary disease, and he was successfully treated with meropenem and cefotiam. However, thrombocytopenia recurred after cefoperazone–sulbactam administration. This indicated that cross-reactivity of platelet-specific antibodies occurred between piperacillin–tazobactam and cefoperazone–sulbactam. However, the responsible drug structures remain unknown, requiring further investigation. Likewise, chemical structure similarities among beta-lactam antibiotics must be examined to determine the risk of immune thrombocytopenia in the clinical setting.
Statewide Truck Volume Estimation Using Probe Vehicle Data and Machine Learning
Authors: Zhang Xu , Chen Mei
Published: March 2023

Network-wide truck volume information is critical for monitoring, managing, and planning highway truck systems as well as the overall transportation system. However, availability of this information is often quite limited because classification counts are only collected at a few locations each year. This paper presents a statewide truck annual average daily traffic (AADT) estimation model using widely available truck probe data that are accessible to transportation agencies. Using Kentucky as a case study, an annual average daily truck probe (AADTP) metric was derived from truck probe data and found to be strongly associated with truck AADT (Pearson’s r = 0.9). Other important variables included in the model were roadway attributes (i.e., functional class, number of lanes, lane width), network centrality, and sociodemographic characteristics of the surrounding area. The final estimation model is a random forest model as it outperformed linear regression, ridge regression, neural network, support vector machine, and extreme gradient boost algorithm in this study. Estimation results show that median and mean absolute percent errors decrease as AADTP increases. For roadways whose AADTP is greater than 53, the median and mean absolute percent errors for estimated truck AADT drop to 20% and 30%, respectively. The model’s utility is demonstrated by generating a truck volume profile for Kentucky’s statewide freight network.
Understanding Emotion Regulation Strategies Among Youths: A Qualitative Study
Authors: Chang Sherilyn , Vaingankar Janhavi Ajit , Seow Esmond , Samari Ellaisha , Chua Yi Chian , Luo Nan , Verma Swapna , Subramaniam Mythily
Published: March 2023

The period of youth encompasses a myriad of experiences that often elicit a range of emotions from the individual. This study was conducted to understand emotion regulation (ER) among youths, specifically to identify strategies employed by youths to regulate emotions, and to understand the perceived importance and impact of ER. Qualitative data were collected through one-to-one semi-structured interviews ( n = 25) and focus group discussions ( n = 11; total 70 participants) among youths aged between 15 and 24 years. Interviews were transcribed verbatim and inductive thematic analysis was used to analyze the data. ER strategies engaged by youths in this study were classified into the following themes: (1) developing emotional awareness and acceptance, (2) emotional catharsis, (3) calling for a timeout, and (4) positive thinking and reframing. Youths perceived the importance of regulating emotions as (1) ER contributes to rational thinking and decision-making, (2) poor ER worsens mental wellbeing, (3) ER provides stability in life, and has (4) relevance to current life stage and environment. Findings from this study illustrate the essential role of ER for youth’s healthy functioning and demonstrate the value of strengthening emotional regulatory capacities in them.
3D-printed gelatin/sodium alginate/58S bioactive glass scaffolds promote osteogenesis in vitro and in vivo
Authors: Tu Xinran , Guo Liyang , Li Yang , Tan Guozhong , Chen Rongfeng , Wu Jingwen , Miao Guohou , Guo Lvhua , Zhang Chengfei , Zou Ting , Zhang Yang , Jiang Qianzhou
Published: March 2023

Three-dimensional (3D)-printed scaffolds are a new strategy to fabricate biomaterials for treating bone defects. Here, using a 3D-printing technique, we fabricated scaffolds consisting of gelatin (Gel), sodium alginate (SA), and 58S bioactive glass (58S BG). To evaluate mechanical properties and biocompatibility of Gel/SA/58S BG scaffolds, the degradation test, compressive strength test, and cytotoxicity test were performed. The effect of the scaffolds on cell proliferation in vitro was determined by 4′,6-diamidino-2-phenylindole (DAPI) staining. To evaluate osteoinductive properties, rBMSCs were cultured on the scaffolds for 7, 14, and 21 days and the expression of osteogenesis-related genes was analyzed using qRT-PCR. To examine the bone healing properties of Gel/SA/58S BG scaffolds in vivo, we used a rat mandibular critical-size defect bone model. The scaffolds were implanted into the defect area of rat mandible and bone regeneration and new tissue formation were assessed using microcomputed tomography (microCT) and hematoxylin and eosin (H&E) staining. The results showed that Gel/SA/58S BG scaffolds had appropriate mechanical strength as a filling material for bone defects. Furthermore, the scaffolds could be compressed within certain limits and then could recover their shape. The extract of the Gel/SA/58S BG scaffold showed no cytotoxicity. In vitro, the expression levels of Bmp2, Runx2, and OCN were increased in rBMSCs cultured on the scaffolds. In vivo, microCT and H&E staining demonstrated that scaffolds induced the formation of new bone at the mandibular defect area. These results indicated that Gel/SA/58S BG scaffolds have excellent mechanical characteristics, biocompatibility, and osteoinductive properties, suggesting that it could be a promising biomaterial for the repair of bone defects.
Understanding Divergence in the Performance of Central Business District Economies Among U.S. Metropolitan Regions, 1995–2019
Authors: Osman Taner
Published: March 2023

Although references to an urban resurgence are pervasive, on average, the share of regional jobs found in central business district (CBD) areas has fallen since the 1990s. Yet, this fact masks great variation in the performance of CBD economies. In several metropolitan regions, the share of jobs found in CBD areas increased over this period. This paper seeks to understand the factors that explain such variation. Relying on a panel of metropolitan regions for the period 1995 to 2019, the paper finds that, as a regional economy increasingly comprises tasks that are more cognitive in nature, the share of its jobs found in CBD areas increases. Although the “great divergence” has been linked to an increasing dispersion of incomes, health care outcomes, and cultural identities among regions, the paper's findings suggest it may also be associated with divergent economic performance among CBD areas.
Effect of boehmite nanoparticles on structural, optical, thermal, mechanical and electrical properties of poly (methyl methacrylate) nanocomposites for flexible optoelectronic devices
Authors: Vyshakh K , Arun K , Sathian Rohith , Furhan AR , Verma Meenakshi , Ramesan MT
Published: March 2023

The structural, optical, morphological and thermal properties of poly (methyl methacrylate) (PMMA)/boehmite nanocomposite films were studied by Fourier transform infrared spectroscopy (FT-IR), UV-Vis spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) studies. The FT-IR spectra of composites showed the characteristic band of boehmite nanoparticles at 518 cm−1 indicating an effective interaction between PMMA and boehmite. The UV-visible measurements showed that the optical energy gaps for the direct permitted transitions decreased as boehmite content increased. The orientation of nanoparticles observed from XRD revealed that the addition of boehmite increases the crystallinity of PMMA. The SEM analysis showed the uniform distribution of boehmite in the PMMA matrix. The shift in glass transition and melting temperatures to higher temperature domains were revealed by DSC analysis. From the TGA studies, the reinforcement of PMMA with boehmite nanoparticles increases thermal stability. The electrical conductivity was measured using the impedance technique, and it was studied as a function of nanoparticles loading, applied frequency ranging from 100 to 106 Hz and at different temperatures. The AC conductivity of the composite increases with frequency and temperature. The activation energy was also measured for all samples at various applied frequencies, and it was observed that it decreased with increasing nanoparticle loading. The dielectric constant of PMMA increases with nanoparticle concentration up to 7 wt%. The modulus, tensile strength, hardness, and impact properties of the PMMA/boehmite nanocomposite films were significantly enhanced by the reinforcement of nanoparticles into the polymer matrix. The excellent optical properties, mechanical strength and electrical properties obtained for 7 wt% loaded nanocomposite films enable them to be used in the construction of electromagnetic induction shielding materials, conducting adhesives, and flame-resistant flexible optoelectronic devices.
Yeast, coal, and straw: J. B. S. Haldane's vision for the future of science and synthetic food
Authors: Holmes Matthew
Published: March 2023

British biologist and science populariser J. B. S. Haldane was known as a contrarian, whose myriad ideas and beliefs would shift to oppose whomever he chose to argue with. Yet Haldane's support for synthetic food remained remarkably stable throughout his life. This article argues that Haldane's engagement with synthetic food during the 1930s and 1940s was shaped by his frustration with the status and direction of scientific research in Britain. Drawing upon the Haldane Papers, I reconstruct how Haldane's interest in synthetic food emerged from the biochemical and physiological optimism of the early 20th century. His mid-20th-century writings were an opportunity for Haldane to voice his political opinions. He attempted to erase the conceptual divide between farm and factory, maintained that food shortages were a capitalist construct, and criticised British colonialism. By pointing out the failure of existing economic systems and governments to develop synthetic food, Haldane made the case that food production should be placed under the control of biologists.
Experimental study of bogie instability monitoring and suppression measures for high-speed EMUs
Authors: Li Yongsheng , Dai Huanyun , Qi Yayun , Qu Sheng , Sun Yi
Published: March 2023

As the key part of the rail vehicle, the bogie’s dynamic performance directly affects the vehicle’s operating performance. A large number of bogie instability phenomena occur during the operation of high-speed Electric Multiple Units (EMUs), which has an important impact on the safety and passenger comfort of the high-speed EMUs. In this paper, through a combination of line tests and simulations to study bogie hunting, line tests are first conducted to test the vibration data and wheel wear evolution of the high-speed EMUs. The data was analyzed to find out the evolution of the bogie instability law of the high-speed EMUs. Then the vehicle dynamic model is established to find out the mechanism of the bogie instability, and finally bogie instability suppression measures are proposed. The results of the test data showed that the wheel wear, the frequency and the amplitude of bogie instability of motor car is greater than that of the trailer car, and the ride index is poorer. The ride indexes at the early and late stages after wheel re-profiling do not exceed 2.5. The equivalent conicity increase is the main cause of bogie instability, and the bogie instability can be effectively suppressed by wheel re-profiling, replacing the yaw damper, and the rail grinding.
The association between symptom or microscopy based diagnosis of bacterial vaginosis (BV) and response to treatment in women with recurrent BV
Authors: Ayinde Oluseyi , Ross Jonathan DC
Published: March 2023

Background

Bacterial vaginosis (BV) is a common condition, yet accurate diagnosis remains a challenge. We explored symptom and microscopy-based diagnosis of BV and assessed the influence of these diagnostic approaches on treatment response.

Methods

BV diagnosis based on patient-reported symptoms, and vaginal swab gram stain microscopy at local laboratories and a central laboratory were compared for women recruited into the VITA trial in England. Multivariable analysis was used to assess the association between the method of diagnosis and symptom resolution 2 weeks after metronidazole treatment.

Results

517 women presenting with vaginal discharge (470/517 [91%]) and/or malodour (440/517 [85%]) were included. The accuracy of patients’ vaginal symptoms compared to local laboratory microscopy for BV diagnosis were —discharge, sensitivity 90% and specificity 5%; malodour, sensitivity 84% and specificity 12%, and compared to a central laboratory diagnosis were —discharge, sensitivity 91% and specificity 8%; malodour, sensitivity 88% and specificity 18%. 143/204 (70%) participants reported symptom resolution after treatment and this was associated with a positive baseline local laboratory diagnosis (adjusted relative risk—aRR 1.64 [1.02 to 2.64]), but not with a positive central laboratory diagnosis (aRR 1.14 [0.95 to 1.37]). Symptom resolution occurred in 75% (83/111) of women who were symptom positive/central laboratory BV positive compared to 65% (58/89) who were symptom positive/microscopy negative.

Conclusion

Symptoms correlated poorly with microscopy-based BV diagnosis but two-thirds of women with a symptom positive/microscopy negative diagnosis experienced symptom resolution following metronidazole treatment. Further studies are needed to determine the optimal investigation and treatment for microscopy-negative women with typical BV symptoms.
A targeted literature review of health economic analyses of human papillomavirus vaccination from various countries
Authors: Segal Hannah A , Rashid Nazia
Published: March 2023

Background

Understanding the cost-effectiveness of the HPV vaccine from a global perspective is important to assess from a policy perspective and to support current and future HPV vaccination programs.

Objectives

The aim of this analysis was to conduct a targeted literature review of published pharmacoeconomic literature on the cost-effectiveness of the HPV vaccine to treat patients in various countries, with a focus on cost-savings and their impact on vaccine recommendations.

Methods

We searched cost-effectiveness studies in HPV published in peer-reviewed literature from 2012 to 2020 using MEDLINE via the PubMed database and Google Scholar.

Results

HPV vaccine cost-effectiveness was found to be greatest in low-income countries where screen programs were not yet in place, additionally, in adolescent males and females. The majority of the economic evaluations viewed the implementation of the HPV vaccine as cost-effective and recommended national HPV vaccination.

Conclusion

The majority of economic studies favored national HPV vaccination for adolescent males and females in various countries. Feasibility of this strategy and implementation remains an open question, in addition to screening coverage rate in countries with no vaccine programs or countries yet to introduce national HPV vaccination.
Intellectual freedom and social responsibility in library and information science: A reconciliation
Authors: Macdonald Stephen
Published: March 2023

This article presents a reconciliation of intellectual freedom and social responsibility in library and information science (LIS). The conflict between traditional intellectual freedom and social advocacy, integral to understanding a range of issues in LIS ethics, juxtaposes a laissez-faire freedom with social intervention. This study, by contrast, engages with conceptions of freedom within philosophical and LIS literatures, presenting a descriptive conceptualisation of both values through the common rubric of freedom. This method, influenced by the later philosophy of Ludwig Wittgenstein, echoes Solove’s conceptualisation of privacy and provides a conceptual clarity lacking in existing LIS literature. This clarity, it is argued, suggests a path of reconciliation for both values. The argument unfolds in three stages. First, the prominent conception of intellectual freedom within LIS represents an ‘anti-censorship’ conception. This conception, restricted to passive physical accessibility, conflicts with literature promoting social responsibility. Second, an analysis of freedom within philosophical literature picks out three conceptions: negative, positive and republican. These conceptions, it is argued, translate to LIS literature and represent a full spectrum of viewpoints within the ‘intellectual freedom vs social responsibility’ debate. Five conceptions in LIS are identified: ‘negative conservative’, ‘negative progressive’, ‘content neutral’, ‘republican’ and ‘freedom as moral action’. The conflict within the ‘intellectual freedom vs social responsibility’ debate, therefore, represents conflict between conceptions of freedom. Third, this insight paves the way for a reconciliation that tempers and ameliorates the tension between both values. Dimova-Cookson’s ‘producer-recipient’ model suggests how a negative intellectual freedom and a positive social responsibility may sit together in a symbiotic relationship. This understanding, illustrated by practical case studies, provides a fresh perspective on the complex interaction of both values within the LIS profession.
Does the Type of Healthcare Financing Systems Matter for Efficiency?
Authors: Shufani Nizar
Published: March 2023

This article aims to identify whether the type of healthcare system financing matters in terms of efficiency. The study covered 35 OECD countries, which follow either the Bismarck system or the Beveridge system. The span of analysis covers the year 2015. Data were derived from OECD statistics and Eurostat databases. In purpose to analyse the impact of the financing method on the overall efficiency of the healthcare system, the developed model of Anderson was employed. Thus, the model allowed us to examine both—the components of the healthcare system, resources, population characteristics, benefits and outcomes, and the relationship of individual components to each other, expressed through efficiency, effectiveness and equality. In addition, statistical methods were used such as descriptive analysis, the independent sample t-test and the Pearson correlation coefficient. It was found that countries of the Bismarck system possess more hospital beds and simultaneously more curative care bed days are provided. It could imply the existence of a supply-induced demand problem. In the case of efficiency, the Bismarck states were found to have a more efficient medical doctor as they provide more consultation per inhabitant than their Beveridge counterparts. However, the Beveridge states were found to have more efficient usage of curative care beds as their bed occupancy rate is higher than Bismarck counterparts.
To Stay or to Leave: The Turnover Intentions of International Academics at Japanese Universities
Authors: Chen Linqi , Chen Lilan
Published: March 2023

The study is devoted to investigating the turnover intentions of international academics at Japanese universities. Semi-structured interviews were conducted with 40 full-time international academics in Japan. The interview data were coded and analyzed through an inductive process based on a four-stage procedure. The study suggests that although many international academics perceived themselves as tokenized symbols, stimulated by the determinants ranging in the dimensions of ease of movement, internal environmental factors, and external environmental factors, the majority of international academics were more inclined to remain in Japan. The study fills in the research gap regarding international academics’ turnover intentions, it also challenges and enriches Matier’s (1990) claim, highlighting that only when faculty members perceived ease of mobility and high internal and external environmental benefits, would they terminate their employment. Implications for policymakers, scholars and university administrators are offered for future studies and institutional practices.
Social Vulnerability and Psychosocial Resilience in Adolescents and Young Adults From a Community Art Network
Authors: Rivera-Romero Nathaly , Cáliz-Romero Nelly Esther , Laverde Eddy Yazmin
Published: March 2023

Background:

Adolescence is a stage of transition with multiple changes and transformations. It is a critical phase to potentiate or disrupt the life course of human beings. In Latin America, adolescents and young adults from countries like Colombia have unequal access to socioeconomic resources, education, and the job market. This may generate social disadvantages and vulnerability.

Aim:

We aimed to identify conditions of social vulnerability and psychosocial resilience in the life course of adolescents and young adults from a community art network in Bogota, Colombia.

Methods:

We conducted a qualitative study with a multivocal design supported by the ethnic-social life history construction. The data were collected using narrative interviews. The interviews were transcribed, coded, categorized, and triangulated according to the principles of grounded theory as an analytical method. We adhered to the consolidated criteria for reporting qualitative research (COREQ) checklist.

Results:

Eight adolescents and young adults between the ages of 12 and 24 years participated in the study. Five categories emerged: social vulnerability, social environment, artistic processes, psychosocial resilience, and life course.

Conclusions:

Social vulnerability and psychosocial resilience coexist during the life course of adolescents and young adults. Social support networks and community art processes have the potential to promote psychosocial resilience in adolescents and young adults.
Multimodal imaging in Best Vitelliform Macular Dystrophy: Literature review and novel insights
Authors: Bianco Lorenzo , Arrigo Alessandro , Antropoli Alessio , Berni Alessandro , Saladino Andrea , Vilela Manuel AP , Mansour Ahmad M , Bandello Francesco , Battaglia Parodi Maurizio
Published: March 2023

Best Vitelliform Macular Dystrophy (BVMD) is a dominantly inherited retinal disease caused by dominant variants in the BEST1 gene. The original classification of BVMD is based on biomicroscopy and color fundus photography (CFP); however, advancements in retinal imaging provided unique structural, vascular, and functional data and novel insights on disease pathogenesis. Quantitative fundus autofluorescence studies informed us that lipofuscin accumulation, the hallmark of BVMD, is unlikely to be a primary effect of the genetic defect. It could be due to a lack of apposition between photoreceptors and retinal pigment epithelium in the macula with subsequent accumulation of shed outer segments over time. Optical Coherence Tomography (OCT) and adaptive optics imaging revealed that vitelliform lesions are characterized by progressive changes in the cone mosaic corresponding to a thinning of the outer nuclear layer and then disruption of the ellipsoid zone, which are associated with a decreased sensitivity and visual acuity. Therefore, an OCT staging system based on lesion composition, thus reflecting disease evolution, has been recently developed. Lastly, the emerging role of OCT Angiography proved a greater prevalence of macular neovascularization, the majority of which are non-exudative and develop in late disease stages. In conclusion, effective diagnosis, staging, and clinical management of BVMD will likely require a deep understanding of the multimodal imaging features of this disease.
Dialysis nurses’ knowledge, attitude, practice and self-efficacy regarding vascular access: A cross-sectional study in Singapore
Authors: Meng Lingyan , Guo Wei , Lou Lillian , Teo Boon Wee , Ho Pei
Published: March 2023

Introduction:

Dialysis nurses play a paramount role in vascular access (VA) management. The aim of this study is to evaluate dialysis nurses’ knowledge, attitude, practice and self-efficacy (KACP-SE) pertaining to VA cannulation and evaluation.

Method:

An anonymous self-administered survey was administered to dialysis nurses from two tertiary hospitals (four dialysis units) and two community dialysis centres from April to May 2022. The 37-items survey consists of four dimensions of questions relating to VA cannulation and management: knowledge, attitude, practice and self-efficacy. The content validity and face validity of the survey was reviewed by three experienced VA professionals and five dialysis nurses respectively. The internal consistency and construct validity of the survey have been assessed with psychometric tests.

Results:

There were 23 and 47 nurses, working in the participated community and tertiary hospital dialysis centres respectively, responded to the survey. The internal consistency coefficients indicated acceptable reliability of the instrument (KR-20 coefficient was 0.55 and 0.76 for knowledge and practice domains; Cronbach’s α was 0.85 and 0.64 for self-efficacy and attitude domains). In the exploratory factor analysis for attitude and self-efficacy, the instrument could account for 64.0% and 53.0% of the total variance respectively. In the knowledge domain, five out of eight single-select multiple-choice questions were correctly answered by >70% of the participants. Overall, the mean (±SD) of participants’ total self-efficacy score was 24.3 (±3.1) over total score of 30. The majority of the participants (82.4%) either agreed or strongly agreed that ultrasound guidance is useful for cannulation.

Conclusion:

This KAP-SE instrument can be used to evaluate knowledge, attitude, practice and self-efficacy of dialysis nurses toward VA management. The participants demonstrated acceptable knowledge level, but with some knowledge gaps identified. It also revealed nurses’ good self-efficacy level and welcoming attitude towards adopting ultrasound in VA cannulation among the participants.
Suction thrombectomy of catheter-associated right atrial thrombus in two patients
Authors: Deshmukh Ashwin P , Cornman-Homonoff Joshua
Published: March 2023

Catheter associated right atrial thrombus (CRAT) is an uncommon but potentially life-threatening condition. There are no established guidelines for management, and treatment ranges from systemic anticoagulation and thrombolysis to open surgery. While there have been reports on use of suction thrombectomy for right atrial thrombi, the feasibility and outcomes of suction thrombectomy in CRAT have not been described. These two cases describe a successful off-label use of two devices (Triever 20, Inari Medical, Irvine, CA, and AlphaVac, AngioDynamics, Latham, NY) for thrombectomy in CRAT. Both patients had near complete extraction of chronic appearing thrombus, with follow up imaging demonstrating complete resolution. Suction thrombectomy may have a unique role in management in CRAT, especially in cases of infected thrombi. A formal exemption from the institutional review board was obtained for publication.
Midline catheters for blood gas and acid/base monitoring in critical patients: A prospective observational study
Authors: Giani Marco , Fumagalli Benedetta , Rezoagli Emanuele , Cannizzo Luigi , Giannini Luciano , D’Amata Dario , Lucchini Alberto , Rona Roberto , Elli Stefano , Foti Giuseppe
Published: March 2023

Background:

Arterial lines and central venous catheter (CVC) allow to monitor patients’ acid-base status and gas exchange. Their placement and maintenance may however be burdened by severe complications. Midline Catheters (MC) are peripheral venous accesses that are less invasive and easier to insert compared to CVC and arterial lines.

Methods:

A prospective observational study was performed including stabilized critical patients with clinical indication to midline positioning before intensive care unit (ICU) discharge. The primary aim was to assess if venous sampling from MCs can be a reliable alternative to CVC for pH and CO2 monitoring. The secondary aim was to evaluate the correlation between samplings from MC, CVC and arterial line with regards to pH, carbon dioxide tension (pCO2), lactates and electrolytes. Three samples from CVC, arterial line and MC were collected simultaneously. Agreement and correlation of the studied parameters between different sampling sites were explored.

Results:

40 patients were included in the analysis. A good agreement for pH and pCO2 was recorded between MC and CVC: mean differences were 0.001 (95% CI −0.006 to 0.007) and 0.7 (−0.1 to 1.5), percentage error 0.4% and 11.2%, respectively. Correlation between MC and both central venous and arterial samples for pH, pCO2, lactates and electrolytes was found to be moderate-to-strong (Pearson’s R coefficient range 0.59–0.99, p < 0.001 for all these parameters).

Conclusions:

In stabilized critical patients, midline catheters represent a reliable alternative to CVC and arterial lines to monitor acid-base disturbances, CO2 levels and electrolytes. The present findings add to the known advantages of MC, which might be considered a first-line vascular access for non-critical or stabilized patients who do not require infusion of vesicant or irritant drugs.
How online harassment affects Korean journalists? The effects of online harassment on the journalists’ psychological problems and their intention to leave the profession
Authors: Lee Na Yeon , Park Ahran
Published: March 2023

This study examined the effects of online harassment on journalists’ psychological trauma and their intention to leave work. It also investigated whether journalists’ psychological trauma mediates the effects of online harassment on their intention to leave the profession and whether gender makes a difference in that relationship. An online survey of 404 South Korean journalists provided three categories of online harassment that journalists experience: (1) aggressive and abusive expression, (2) disclosure of private information, and (3) cyberstalking and hacking. The findings of this study show that aggressive and abusive expression was the most frequent type of online harassment whereas cyberstalking and hacking was the least frequent. As expected, online harassment was found to be positively associated with journalists’ psychological trauma (PTSD symptoms) and intention to leave work. The results further indicate that journalists’ psychological trauma originating from online harassment frequently resulted in an intention to leave work. Interestingly, journalists’ psychological trauma was a significant mediator in the relationship between psychological trauma levels and intention to leave work for female journalists, but not for male journalists.
“I love learning new things”: An institutional logics perspective on learning in professional journalism
Authors: Koivula Minna , Saari Tiina , Villi Mikko
Published: March 2023

In contemporary working life, journalists are often faced with the pressures of an increasingly precarious field where employment is less stable and more contractual than in previous years. Consequently, learning as a skill has grown in importance as journalists enter and leave the job market. Previous research has often portrayed professional journalists as unwilling to learn due to the persistence of the institution of journalism. Consequently, this study examines learning in professional journalism through interviews with 30 Finnish journalists. We adopt the institutional logics perspective to examine which institutional logics manifest in journalists' descriptions of learning and how. We identify a labor market logic that highlights how the need to learn continuously to satisfy employer needs is felt as pervasive. Additionally, our analysis suggests that journalists negotiate the technology logic’s push for learning digital skills with journalism’s professional logic. The analysis also highlights a negotiation of market and professional logics in the journalists' experiences of intensification in relation to learning. Intensification, specifically, may have consequences for journalists' skill levels and occupational well-being.
Gaining Awareness of Increasingly Persistent SCN1A Mutations
Authors: Wong Jennifer C.
Published: March 2023

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Initial Experience of Simultaneous Combined use of Percutaneous Nephrolithotomy and Flexible Ureteroscopy in Complex Renal Calculi: A Novel Surgical Technique of ‘Through-Through’ Approach
Authors: Yang Lei , Yin Zhikang , Liu Hang , Wu Xiaohou
Published: March 2023

Background

For complex branched renal calculi, the endoscopic combined intrarenal surgery (ECIRS) is worldwide prevalent. This study aimed to present a novel surgical technique of percutaneous nephrolithotomy combined with antegrade flexible ureteroscopy which is named ‘Through-through’ approach.

Methods

We retrospectively analyzed the data of 68 patients with complex renal calculi who underwent combined PNL and flexible ureteroscopy surgery using ‘Through-through’ approach at our center between August 2019 and December 2021. The ‘Through-through’ approach to surgery was indicated in residual calyceal calculi that neither rigid nephroscope nor retrograde flexible ureteroscope could reach. The brief procedure of this technique involved determining the direction of targeted calyces with the nephroscope first, followed by putting flexible ureteroscope into the targeted calyx through the nephroscope instrument channel and basketing or dusting residual calculi through the flexible ureteroscope instrument channel.

Results

The mean maximum stone diameter was 4.0 ± 0.4 cm. The mean operative duration was 100.1 ± 18.0 minutes, and mean hemoglobin loss was 21.4 ± 5.1 g/L. In all 68 patients, calculi were cleared in 62 patients, and the stone free rate was 91.2%. Five patients underwent further surgery after 2 weeks because of significant residual calculi. One patient that had a 6 mm residual stone chose observational follow-up. Ten patients emerged with postoperative fever but did not progress to uroseptic shock. There were no Clavien grade ≥ III complications, and none of the patients required blood transfusion.

Conclusion

The ‘Through-through’ approach is safe, feasible and effective for complex renal calculi patients. It is a complementary solution to the failed endoscopic combined intrarenal surgery.
Learning to Enhance Community-Responsiveness in an Out-of-School Club Program
Authors: Burke Lydia E. Carol-Ann
Published: March 2023

This article describes a methodology and method that can be adopted by informal education leaders who are interested in establishing or developing a community-responsive focus for out-of-school club programming. Based on an adaptation of Dewey’s Laboratory School model, a university research team partnered with a community-based science club provider (the STEM Academy) to establish a model club space where ways of enhancing community-responsiveness could be explored. The overall aim was to scale up an iterative practice of research-informed adaptations into a program of over 20 clubs. The partnership was focused on a two-phase process, equipping the STEM Academy to continue an ongoing research practice in the absence of university influence. The first phase of the study involved gathering information regarding science needs, wants and preferences of a new community context. The second phase established a model club space and sought community feedback on the efficacy of the club in meeting community desires. The research approach used to establish the club and gather ongoing data is described in this article which ends by proposing a schema that can be adapted to suit other out-of-school clubs and programs.
Robust servo linear quadratic regulator controller based on state compensation and velocity feedforward of the spherical robot: Theory and experimental verification
Authors: Wang Yixu , Liu Yifan , Guan Xiaoqing , Hu Tao , Zhang Ziang , Wang You , Hao Jie , Li Guang
Published: March 2023

There are few studies on the lateral motion of spherical robots. In this article, a new algorithm is proposed to solve the problem of low control accuracy of the lateral motion. A single lateral motion model is established, and the optimal solution of the linear quadratic regulator in infinite time domain is obtained. Aiming at the problems of longitudinal velocity and lateral angle coupling and low control precision, state compensation and velocity feedforward are carried out, and an improved robust servo linear quadratic regulator control algorithm is proposed. Experiments show that the proposed lateral control algorithm has strong adaptability and robustness to changing speeds and lateral angles, and the control effect is stable and reliable.
Scientific mapping of the state-of-the-art in padel. A bibliometric analysis
Authors: Denche-Zamorano A. , Escudero-Tena A. , Pereira-Payo D. , Adsuar J. C. , Muñoz D.
Published: March 2023

Padel has become one of the most popular racket sports in the world, capturing the interest of researchers and thus increasing the number of manuscripts that revolve around this sport. This article describes the state of development of the science of padel and locates the most relevant journals, authors, institutions, countries and keywords on the subject. The set of publications related to padel was retrieved from the main collection of the Web of Science. The state of development of padel in science was verified. Journals, authors, institutions, countries and keywords in the topic were analysed with the VOSviewer software. A total of 116 publications were analysed, finding that the publications on padel were in a phase of exponential growth. Sánchez-Alcaraz, Courel-Ibañez, Muñoz-Marín, Ramón-Llin and Sánchez-Pay were the most prominent authors, with the University of Murcia and Spain being the main institution and country on the subject. The science of padel is growing exponentially, with Spain being the driving force behind the topic of study, with new countries joining in recent years. This study provides relevant information on the state-of-the-art padel, and it will help researchers to establish new relationships and find more relevant authors and articles.
Angry Posts Mobilize: Emotional Communication and Online Mobilization in the Facebook Pages of Western European Right-Wing Populist Leaders
Authors: Gerbaudo Paolo , De Falco Ciro Clemente , Giorgi Giulia , Keeling Silvia , Murolo Antonia , Nunziata Federica
Published: March 2023

The rise of right-wing populists in Western Europe has often been linked to their ability to exploit social media affordances to fuel anger. While scholarship has already examined the emotional dimension of the populist right’s online communication, with some researchers studying specifically the fuelling of anger among social media users, we still lack empirical proof of the mobilizational effectiveness of what we describe as “anger-triggering communication.” To explore this question, in this article, we develop a statistical and topic analysis of right-wing populists’ Facebook pages in Italy, France, Spain, and Germany during the 2019 European Union (EU) election campaign. We find that (a) right-wing populists on Facebook have a significantly higher number of “Angry” Facebook reactions per post compared to their political adversaries; (b) there is a positive and significant effect of the number of Angry reactions on the number of times a post is shared; (c) Angry reactions and Shares are overrepresented in posts on immigration and security, but anger-fuelled mobilization is not limited to these topics. These findings contribute to the scholarship on social media, emotional communication, and populism, adding insights on the mobilizational effectiveness of negative campaigning. The article highlights that stoking public anger, especially around controversial issues such as immigration and security, is a rewarding tactic because it increases motivational strength, and contributes to triggering high-threshold interactions such as sharing, which, in turn, are key for achieving virality in the diffusion of political messages.
Pouch Transfer for Single Coronary Artery With Nodal Artery Variant in Arterial Switch Operation
Authors: Pai Albert , Young Krista , Ashwath Ravi , Ricci Marco , Karimi Mohsen
Published: March 2023

The arterial switch operation with single coronary artery variance is an independent risk factor for increased operative mortality. There are reports of technical modifications, such as the double-barreled sinus pouch configuration, to improve geometric reimplantation of the single coronary into the neoaortic sinus. We describe the novel application of this technique for transferring a single coronary artery with a separate nodal artery emanating from the opposite sinus during an arterial switch operation.