bluuebunny/crossref_metadata_2025_split huggingface dataset:
Development and performance evaluation of a rapid in-house ELISA for retrospective serosurveillance of SARS-CoV-2
Authors: Sil Bijon Kumar , Jahan Nowshin , Haq Md. Ahsanul , Oishee Mumtarin Jannat , Ali Tamanna , Khandker Shahad Saif , Kobatake Eiry , Mie Masayasu , Khondoker Mohib Ullah , Jamiruddin Mohd. Raeed , Adnan Nihad 
Published: February 2021

Background
In the ongoing pandemic situation of COVID-19, serological tests can complement the molecular diagnostic methods, and can be one of the important tools of sero-surveillance and vaccine evaluation.

Aim
To develop and evaluate a rapid SARS-CoV-2 specific ELISA for detection of anti-SARS-CoV2 IgG from patients’ biological samples.

Methods
In order to develop this ELISA, three panels of samples (n = 184) have been used: panel 1 (n = 19) and panel 2 (n = 60) were collected from RT-PCR positive patients within 14 and after 14 days of onset of clinical symptoms, respectively; whereas panel 3 consisted of negative samples (n = 105) collected either from healthy donors or pre-pandemic dengue patients. As a capturing agent full-length SARS-CoV2 specific recombinant nucleocapsid was immobilized. Commercial SARS-CoV2 IgG kit based on chemiluminescent assay was used for the selection of samples and optimization of the assay. The threshold cut-off point, inter-assay and intra-assay variations were determined.

Results
The incubation/reaction time was set at a total of 30 minutes with the sensitivity of 84% (95% confidence interval, CI, 60.4%, 96.6%) and 98% (95% CI, 91.1%, 100.0%), for panel 1 and 2, respectively; with overall 94.9% sensitivity (95% CI 87.5%, 98.6%). Moreover, the clinical specificity was 97.1% (95% CI, 91.9%, 99.4%) with no cross reaction with dengue samples. The overall positive and negative predictive values are 96.2% (95% CI 89.2%, 99.2%) and 96.2% (95% CI, 90.6% 99.0%), respectively. In-house ELISA demonstrated 100% positive and negative percent agreement with Elecsys Anti-SARS-CoV-2, with Cohen’s kappa value of 1.00 (very strong agreement), while comparing 13 positive and 17 negative confirmed cases.

Conclusion
The assay is rapid and can be applied as one of the early and retrospective sero-monitoring tools in all over the affected areas.
Can respondent driven sampling be used to recruit new mothers? A mixed methods study in metropolitan Washington DC
Authors: Carlin Rebecca F. , Cornwell Benjamin , Wang Jichuan , Cheng Yao , Mathews Anita , Oden Rosalind P. , Fu Linda Y. , Moon Rachel Y. 
Published: February 2021

BackgroundRespondent driven sampling (RDS) is employed to recruit populations that are hard-to-reach, “hidden,” or without a sampling frame. For new mothers (those with infants <6 months) in countries without national health care systems or registries, there is no sampling frame, and random samples may only be attained through costly strategies, e.g., random-dial calling.ObjectiveTo assess the feasibility of RDS to recruit new mothers.MethodsIn the initial study, we recruited 30 new mothers (“seeds”) from a single birth hospital; each was given 3 referral coupons to give to other mothers (“referrals”). When our sample did not self-perpetuate with referrals, additional seeds were recruited. Demographics of seeds and referrals were compared. A subset of mothers participated in focus groups and were asked about their experience with RDS. We also conducted a second survey of new mothers to further assess feasibility of RDS in this population.ResultsOf the 402 mothers recruited in the initial study, 305 were seeds and only 97 were referrals. Referrals were more likely to be White, highly educated, older, and privately insured (all p≤0.001). Focus group participants indicated that the time required to meet other mothers was an important barrier. In the second survey we recruited 201 mothers; only 53.7% knew ≥1 mother whom they could invite to the study.ConclusionsNew mothers are not easily recruited using RDS because they have a limited number of contacts who are also new mothers. Those recruited through RDS are more likely to be older, Caucasian and of high socioeconomic status, indicating it is not an effective way to recruit a representative sample of new mothers.
Social Capital in Community-Based Waste Bank Management
Authors: Amalia Shafiera 
Published: February 2021

The waste bank is an innovative method to increase knowledge and behaviour to manage household waste. As a collective action at the community level, social capital has a vital role in the management of the waste bank. This study aims to identify and analyse how the level of trust, network, and social norms play a role in creating a sustainable, community-based waste bank management. This research used the qualitative approach and descriptive method. The data collection techniques were carried out using observations, literature studies, and in-depth interviews. The data were analysed using a qualitative-descriptive technique. The study shows that The Lintas Winongo Waste Bank is a community-based waste bank because it was established and managed by community members in RW 11, Bumijo Urban Village, Yogyakarta City. The manager of Lintas Winongo Waste Bank collaborates with several actors to support the management of the waste bank. The Lintas Winongo Waste bank management requires trust between the actors because it is related to the flow of money. The trust between the actors is built through the transparency of the waste bank management process. The network has a role in exchanging information and providing access to various resources required. The strategies to build networking with the actors are communication, shared understanding regarding the purpose of the waste bank, and a shared commitment to support the waste bank management. The social norms are required to maintain the transparency process and trust between the actors. Moreover, the social norm can build awareness of the citizens to manage domestic waste.
Beyond the Coronavirus: Understanding Crises of Social Reproduction
Authors: Rao Smriti 
Published: February 2021

From a feminist political economy perspective, the unfolding of the coronavirus is a further reminder of the fundamental contradiction between a capitalist system that prioritises profits, and a feminist ethic that prioritises life-making or social reproduction. This article argues for a more systematic understanding of crises of social reproduction under capitalism, stressing the difference between such crises for labour and those for capital. The coronavirus crisis represents an extraordinary example of a crisis of social reproduction for capital, but this article examines crises of social reproduction for capital and labour that arise from the more ordinary workings of capitalism. The focus is on unfolding such crises in the Global South, using the case of India to illustrate the usefulness of such an analysis.
KEYWORDS: social reproduction; gender; labour; political economy; India
Coordinated Prefrontal State Transition Leads Extinction of Reward-Seeking Behaviors
Authors: Russo Eleonora , Ma Tianyang , Spanagel Rainer , Durstewitz Daniel , Toutounji Hazem , Köhr Georg 
Published: February 2021

Extinction learning suppresses conditioned reward responses and is thus fundamental to adapt to changing environmental demands and to control excessive reward seeking. The medial prefrontal cortex (mPFC) monitors and controls conditioned reward responses. Abrupt transitions in mPFC activity anticipate changes in conditioned responses to altered contingencies. It remains, however, unknown whether such transitions are driven by the extinction of old behavioral strategies or by the acquisition of new competing ones. Usingin vivomultiple single-unit recordings of mPFC in male rats, we studied the relationship between single-unit and population dynamics during extinction learning, using alcohol as a positive reinforcer in an operant conditioning paradigm. To examine the fine temporal relation between neural activity and behavior, we developed a novel behavioral model that allowed us to identify the number, onset, and duration of extinction-learning episodes in the behavior of each animal. We found that single-unit responses to conditioned stimuli changed even under stable experimental conditions and behavior. However, when behavioral responses to task contingencies had to be updated, unit-specific modulations became coordinated across the whole population, pushing the network into a new stable attractor state. Thus, extinction learning is not associated with suppressed mPFC responses to conditioned stimuli, but is anticipated by single-unit coordination into population-wide transitions of the internal state of the animal.SIGNIFICANCE STATEMENTThe ability to suppress conditioned behaviors when no longer beneficial is fundamental for the survival of any organism. While pharmacological and optogenetic interventions have shown a critical involvement of the mPFC in the suppression of conditioned responses, the neural dynamics underlying such a process are still largely unknown. Combining novel analysis tools to describe behavior, single-neuron response, and population activity, we found that widespread changes in neuronal firing temporally coordinate across the whole mPFC population in anticipation of behavioral extinction. This coordination leads to a global transition in the internal state of the network, driving extinction of conditioned behavior.
Locally Adaptive Thresholding for Single-Shot Structured Light Patterns
Authors: Sadatsharifi Kasra , Naiel Mohamed A. , Lamm Mark , Fieguth Paul 
Published: February 2021

Image thresholding is a challenging task due to its sensitivity to environmental variations and degradation in the quality of the captured image. Although many image thresholding methods have been introduced, most of them require the fine tuning of a thresholding parameter that is not suitable for single-shot structured light (SSSL) based projector-camera applications. In this paper, we introduce a locally adaptive thresholding method with automatic parameter selection based on the local statistics of the distinct image partitions. For assessing the proposed scheme, we introduce an evaluation that relies on mapping SSSL patterns between the camera and projector spaces. Experimental results demonstrate the effectiveness of the proposed technique by maintaining the thresholding accuracy of the baseline method, without the need to fine tune the obtained thresholding parameter or any noticeable change in the qualitative results.
Communication Strategies Used in Teaching Media Information Literacy for Combating Hoaxes in Indonesia: A Case Study of Indonesian National Movements
Authors: Ummah Nurul Hidayatul , Fajri Muchamad Sholakhuddin Al 
Published: February 2021

This study examined communication strategies used by Indonesian national movements to teach media information literacy as an endeavour to fight hoaxes. The in-depth online interview and content analysis had been employed to investigate approaches of the movement to campaign media information literacy competence to society. The findings reveal that the offline communication has been massively applied by the movement to establish direct engagement to give a comprehensive understanding. Moreover, in the case of online communication, the content of Instagram shows that the movements predominantly use Instagram for marketing tools which post much information related to offline activities, instead of educated contents that contain media information literacy understanding. This study suggests that educating media information literacy through online communication should be prioritised, as 140 million Indonesians are active social media users, dominated by the youth aged 18-24 who are prone to be attacked by fake news.
Problematic shopping and self-injurious behaviors in adolescents
Authors: Greenberg Norman R. , Zhai Zu Wei , Hoff Rani A. , Krishnan-Sarin Suchitra , Potenza Marc N. 
Published: February 2021

AbstractBackground and aimsSelf-injurious behaviors (SIBs) and problematic shopping (PS) are both prevalent in adolescents. These behaviors have been proposed as behavioral addictions and linked to impulsivity (Imp) and sensation-seeking (SS). They are also associated with negative mental health and psychosocial measures. This study examined relationships between PS and SIB in adolescents. It also examined how PS and SIB relate to Imp and SS, and interactions between PS and SIB in relation to health/functioning measures.MethodsSurvey data from 2,624 Connecticut high-school students were evaluated using chi-square analyses. Next, logistic regression models were used to assess relationships between PS and measures of SIB. T-tests compared Imp and SS in adolescents with and without PS and SIB. Interaction analyses assessed effects of PS on relationships between SIB and health/functioning measures.ResultsAdolescents with PS had 3.43-fold higher odds of endorsing lifetime SIB than those without PS, and were more likely to exhibit severe SIB and disruption due to SIB. PS and SIB were associated with elevated Imp and SS. Interaction analyses revealed that in adolescents with PS, the relationships between SIB and substance use was weaker than in adolescents without PS. This suggests PS accounts for variance in relationships between SIB and substance use.Discussion and conclusionsPS is strongly related to SIB prevalence, severity, and impairment in adolescents, and weakens associations between SIB and substance use. PS should therefore be considered for prevention efforts for SIB. Further research should investigate mechanisms connecting PS and SIB and explore possible interventions targeting associated features like Imp and SS.
Prerequisites for stakeholder framework: Consumer advocacy and health protection in the digital industry. •
Authors: Lee Hae Kook 
Published: February 2021

AbstractThe World Health Organization (WHO) included gaming disorders in International Classification of Disease-11th (ICD-11) on May 25, 2019. Since then, some academics and the gaming industry have continued to argue over the health system's response to online addictive behaviors. Under these circumstances, a framework involving groups representing various interests is needed to derive a reasonable solution to the dispute over the inclusion of gaming disorders in ICD-11. For this framework to work effectively, it is necessary to agree on consistent and advanced research findings that harms related to the excessive use of digital devices or content continue to occur empirically all over the world and that addictive use constitutes a primary addictive disorder. The problematic risk taking involving emerging technologies may include not only health risks from addictive use, but also more general harms associated with digital ethics and norms such as privacy and transparent money transactions. An understanding of a public health model of addiction is required to reduce harms associated with online addictive behavior that exist behind risk taking. Such harms are also mediated by excessive use, excessive money spending, and exposure to addictive content such as violence and pornography. Major stakeholders and their roles can be derived more effectively based on these conceptual models and parameters of harms. In conclusion, the context of the proposed stakeholder framework should be further optimized on the basis of two principles: (1) advocating consumer rights as a general and standard approach to digital products; and (2) protecting consumers' health from harms related to addictive behaviors.
Mediating effects of rumination and bedtime procrastination on the relationship between Internet addiction and poor sleep quality
Authors: You Zhiqi , Mei Weijie , Ye Na , Zhang Lu , Andrasik Frank 
Published: February 2021

AbstractBackground and aimsNumerous studies have shown that people who have Internet addiction (IA) are more likely to experience poor sleep quality than people who do not. However, few studies have explored mechanisms underlying the relation between IA and poor sleep quality. As a first attempt to address this knowledge gap, a cross-sectional design was applied, and structural equation modeling was used to explore the direct relationship between IA and poor sleep quality, as well as the potential mediating roles of rumination and bedtime procrastination.MethodsA convenience sample, consisting of 1,104 Chinese University students (696 females or 63%), completed an online survey that included the following measures: Young’s 8-item Internet Addiction Diagnosis Questionnaire, the Pittsburgh Sleep Quality Index, the Ruminative Responses Scale, and the Bedtime Procrastination Scale.ResultsWhile the direct path between IA and poor sleep quality was not found to be significant, rumination and bedtime procrastination were each shown to separately mediate the predictive effect of IA on poor sleep quality. However, the greatest level of support was found for the sequential mediating effects of rumination and bedtime procrastination between IA and poor sleep quality.ConclusionWhile rumination and bedtime procrastination were both shown to be important independent mediators for the relation between IA and poor sleep quality, their combined effect was as great as either alone.
Sensitivity estimation for calculated phase equilibria
Authors: Otis Richard , Bocklund Brandon , Liu Zi‐Kui 
Published: February 2021

AbstractThe development of a consistent framework for Calphad model sensitivity is necessary for the rational reduction of uncertainty via new models and experiments. In the present work, a sensitivity theory for Calphad was developed, and a closed‐form expression for the log‐likelihood gradient and Hessian of a multi‐phase equilibrium measurement was presented. The inherent locality of the defined sensitivity metric was mitigated through the use of Monte Carlo averaging. A case study of the Cr–Ni system was used to demonstrate visualizations and analyses enabled by the developed theory. Criteria based on the classical Cramér–Rao bound were shown to be a useful diagnostic in assessing the accuracy of parameter covariance estimates from Markov Chain Monte Carlo. The developed sensitivity framework was applied to estimate the statistical value of phase equilibria measurements in comparison with thermochemical measurements, with implications for Calphad model uncertainty reduction.
Recent developments on fabrication of Al‐matrix composites reinforced with quasicrystals: From metastable to conventional processing
Authors: Wolf Witor , Bolfarini Claudemiro , Kiminami Claudio S. , Botta Walter J. 
Published: February 2021

AbstractQuasicrystalline alloys and their composites have been extensively studied due to their complex atomic structures, mechanical properties, and their unique tribological and thermal behaviors. However, technological applications of these materials have not yet come of age and still require additional developments. In this review, we discuss the recent advances that have been made in the last years toward optimizing fabrication processes and properties of Al‐matrix composites reinforced with quasicrystals. We discuss in detail the high‐strength rapid‐solidified nanoquasicrystalline composites, the challenges involved in their manufacturing processes and their properties. We also bring the latest findings on the fabrication of Al‐matrix composites reinforced with quasicrystals by powder metallurgy and by conventional metallurgical processes. We show that substantial developments were made over the last decade and discuss possible future studies that may result from these recent findings.
Unveiling oxidation mechanism of bulk ZrS2
Authors: Yang Liqiu , Tiwari Subodh C. , Jo Seong Soon , Hong Sungwook , Mishra Ankit , Krishnamoorthy Aravind , Kalia Rajiv K. , Nakano Aiichiro , Jaramillo R. , Vashishta Priya 
Published: February 2021

Abstract
Transition metal dichalcogenides have shown great potential for next-generation electronic and optoelectronic devices. However, native oxidation remains a major issue in achieving their long-term stability, especially for Zr-containing materials such as ZrS2. Here, we develop a first principles-informed reactive forcefield for Zr/O/S to study oxidation dynamics of ZrS2. Simulation results reveal anisotropic oxidation rates between (210) and (001) surfaces. The oxidation rate is highly dependent on the initial adsorption of oxygen molecules on the surface. Simulation results also provide reaction mechanism for native oxide formation with atomistic details.

Graphic Abstract
THE INFLUENCE OF INFLATION AND RETURN ON INVESTMENT (ROI) WITH THE DU PONT METHOD SYSTEM OF STOCK RETURN PT. LIPPO KARAWACI DURING THE YEAR 2010-2019
Authors: Yulandri Elsa , Hartati Neneng 
Published: February 2021

AbstractIn investment transactions in the capital market, an investor will expect a higher level of investment invested. In order for the expected results to be appropriate, it is necessary to analyze the financial statements of a company with fundamental and technical analysis. This article aims to show the effect of inflation and ROI with the du pont system method on the stock return of PT. Lippo Karawaci, Tbk. Inflation is an increase in the price of goods and services in general over a long period of time. Meanwhile, the ROI du pont system is a ratio that measures how good the total assets can generate investment. This article also uses descriptive methods and quantitative approaches, namely to describe the research results presented in numerical form. The data in this article is secondary data taken from the financial statements of PT. Lippo Karawaci, Tbk, and supported by a library and documentation studio, which is processed statistically and quantitatively. The results of the study concluded that both partially and simultaneously inflation and ROI with the Du Pont System method did not have a significant effect on stock returns of PT. Lippo Karawaci. The second variable contribution is only 31%, meaning that it is 69% stock return, other factors are outside this study. Keywords: Inflation, ROI with the Du Pont System Method, Stock Return. AbstrakDalam transaksi investasi di pasar modal, seorang investor akan mengharapkan tingkat pengembalian yang tinggi atas investasi yang ditanamkan. Agar hasil yang diharapkan sesuai maka perlu dilakukan analisis terhadap laporan keuangan suatu perusahaan dengan analisis fundamental dan teknikal. Artikel ini bertujuan untuk menguji pengaruh inflasi dan ROI dengan metode du pont system terhadap return saham PT. Lippo Karawaci, Tbk. Inflasi merupakan kenaikan harga barang dan jasa secara umum dalam jangka waktu yang panjang. Sedangkan ROI du pont system merupakan rasio yang mengukur seberapa besar total aset dapat menghasilkan pengembalian investasi. Artikel ini juga menggunakan metode deskriptif dan pendekatan kuantitatif, yakni untuk mendeskripsikan hasil penelitian yang datanya disajikan dalam bentuk numerik. Data pada artikel ini merupakan data sekunder yang diambil dari laporan keuangan PT. Lippo Karawaci, Tbk dan didukung dengan studi kepustakaan dan dokumentasi, yang diolah scara statistik dan kuantitatif. Hasil penelitian ini menyimpulkan bahwa baik secara parsial dan simultan inflasi dan ROI dengan dengan metode Du Pont System tidak memiliki pengaruh yang signifikan terhadap return saham PT. Lippo Karawaci. Kontribusi kedua variabel hanya 31%, artinya sebesar 69% return saham dipengaruhi oleh faktor-faktor lain diluar penelitian ini. Kata kunci: Inflasi, ROI dengan Metode Du Pont System, Return Saham