bluuebunny/crossref_metadata_2025_split huggingface dataset:
Construction of a volatility index from exchange-traded dollar–rupee options
Authors: Bhat Aparna Prasad 
Published: May 2022

PurposeThis paper aims to propose the implied volatility index for the US dollar–Indian rupee pair (INRVIX). The study seeks to examine whether INRVIX truly reflects future USDINR (US Dollar-Indian rupee) volatility and signals profitable currency trading strategies.Design/methodology/approachTwo measures of INRVIX are constructed and compared: a model-free version based on the methodology adopted by the Chicago Board of Options Exchange (CBOE) and a model-dependent version constructed from Black–Scholes–Merton-implied volatility. The proposed INRVIX is computed by tweaking some parameters of the CBOE methodology to ensure compatibility with the microstructure of the Indian currency derivatives market. The volatility forecasting ability of INRVIX is compared to that of a generalized autoregressive conditional heteroscedasticity (1,1) model. Ordinary least squares regression is used to examine the relationship between n-day-ahead USDINR returns and different quantiles of INRVIX.FindingsResults indicate that INRVIX based on the model-free approach reflects ex post volatility in a better manner than its model-dependent counterpart, although neither measure is found to be an unbiased and efficient forecast. Subsample analysis across tranquil and turbulent periods corroborates the results. The volatility forecasting performance of INRVIX is found to be better than that of forecasts based on historical time-series. These results are consistent with similar studies of developed market currencies. The study does not find any significant relationship between extreme levels of INRVIX and the profitability of trading strategies based on such levels, which is contrary to results from the equity options market.Practical implicationsForeign exchange volatility affects the costs of international trade and the external sector competitiveness of Indian multinationals. It is a significant risk factor for financial institutions and traders in the financial markets. An implied VIX for the USDINR could serve as an indicator of expected foreign exchange risk. It could thus provide a signal for a possible intervention in the forex market by the regulator. Regulators could introduce volatility derivative contracts based on the INRVIX. Such contracts would enable hedging of the pure volatility risk of dollar–rupee exposure. Thus, the study has practical implications for investors, hedgers, regulators and academicians alike.Originality/valueTo the author’s knowledge, this is one of a few studies to construct an implied VIX for an emerging currency like the rupee. The study is based on up-to-date sample data that includes the recent COVID-19 market crash. A novel contribution of this paper is that in addition to examining whether INRVIX contains information about future USDINR volatility, and it also examines the signalling power of INRVIX for currency trading strategies.
Where service recovery meets its paradox: implications for avoiding overcompensation
Authors: Edström Andreas , Nylander Beatrice , Molin Jonas , Ahmadi Zahra , Sörqvist Patrik 
Published: May 2022

PurposeThe service recovery paradox (SRP) is the phenomenon that happens when customer satisfaction level post-service failure and recovery surpasses the customer satisfaction level achieved at error-free service. The aim of this study was to identify how large the size of compensation has to be at recovery for customer satisfaction to surpass that of error-free service (i.e. to identify a threshold value for SRP). The purpose of this is to inform managers how to restore customer satisfaction yet avoid overcompensation.Design/methodology/approachThe paper covers two studies. Study 1 used the novel approach of asking participants who had experienced a service failure in the hotel industry what amount of money (recovery) would make them more satisfied than in the case of error-free service. Study 2 then tested the compensation levels expressed by Study 1 participants to be sufficient for the service recovery paradox to occur.FindingsStudy 1 indicated that the threshold for the SRP was (on average) around 1,204 SEK, or just over 80% of the original room reservation price of 1,500 SEK (approx. $180). Study 2 found that (on average) the customer satisfaction of participants who received 1,204 SEK in compensation for service failure marked the point where it surpassed that of error-free service. Participants who received 633 SEK were less satisfied; participants who received 1,774 SEK were more satisfied.Research limitations/implicationsThe findings are context-specific. Future research should test the findings' generalizability.Practical implicationsThe approach used in this paper could provide managers with a tool to guide their service recovery efforts. The findings could help hotel managers to make strategic decisions to restore customer satisfaction yet avoid overcompensation, given a legitimate service failure in which the organization is at fault.Originality/valueNumerous previous studies have investigated the occurrence or absence of the SRP at predetermined compensation levels. This paper used a novel approach to find a quantitative threshold at which the magnitude of the recovery effort makes customer satisfaction surpass that of error-free service.
Investigating supply chain research trends amid Covid-19: a bibliometric analysis
Authors: Erboz Gizem , Abbas Haidar , Nosratabadi Saeed 
Published: May 2022

PurposeThe purpose of this study is to analyse the effects of Covid-19 on the supply chain management and to provide an agenda for future research in this context.Design/methodology/approachBy using the SCOPUS database, a total of 191 articles of 1,323 research articles were selected for further analysis. Bibliometric analysis and science mapping were performed which included author influence, affiliation statistics, keywords, citations, co-citation and co-word analysis.FindingsFive clusters were identified in the context of supply chain management under Covid-19: managing disruptions in global food supply chains (SCs), using Industry 4.0 technologies for sustainable SCs, collaboration across the supply network for contingency situations, coping with disease outbreaks in personal and professional lives and countering the ripple effect of pandemics. These clusters are potential areas for future research.Originality/valueLiterature is still rare about SC practices amid the Covid-19 crisis. Therefore, this study attempts to provide insights and fill the current gaps on this field.
Facilitator or enforcer, ally or enemy? Claimant’s perceptions of insurers’ roles in occupational rehabilitation
Authors: Pasanen Jarna 
Published: May 2022

Purpose
This study aims to deepen the understanding of insurers’ role within the return-to-work (RTW) process by uncovering and categorizing the multiple roles assumed by the insurer based on the claimant’s perceptions and identifying the underlying mechanisms that explain the relationship between perceived insurer roles and occupational rehabilitation outcomes.

Design/methodology/approach
The author used a qualitative approach with theory-guided content analysis to examine 24 semi-structured interviews with occupational rehabilitation claimants who had undergone occupational rehabilitation within the earnings-related pension insurance system in Finland.

Findings
The author uncovered three perceived insurer roles in relation to other stakeholders in the rehabilitation network: financier, coordinator and leader. These roles have different perceived responsibilities and influences on rehabilitation outcomes. Additionally, the author found four perceived insurer roles in relation to the claimants, which varied according to their democracy and activity levels: ally, facilitator, enforcer or enemy. Based on this study, the author recommends that insurers adopt democratic and participatory actor roles (ally and facilitator) to promote the RTW process in occupational rehabilitation.

Originality/value
This inaugural study applied role theory to insurers within the RTW process, developing a new framework of insurer profiles. This study reveals the dynamic nature of insurers and enhances the understanding of the connections between perceived insurer roles and rehabilitation outcomes.
Parasitism dramatically alters the ecosystem services provided by freshwater mussels
Authors: Brian Joshua I. , Reynolds Sam A. , Aldridge David C. 
Published: May 2022

Abstract

Parasites can indirectly affect ecosystem function by altering host phenotype, but the trait‐mediated impacts of parasitism at an ecosystem level remain poorly characterised. However, understanding the influence of parasites is central to understanding the ecosystem services provided by host species, especially in an era of global environmental change.

We examined the effect of native (the trematode Rhipidocotyle campanula) and invasive (the bitterling fish Rhodeus amarus) parasites, and their interaction, on the clearance rates of unionid mussels, a dominant ecosystem‐engineering group that modify freshwater ecosystems worldwide. We used a combination of field experiments, laboratory experiments and ecological simulations to demonstrate the phenotypic impact of parasites on the functional response of two mussel species across an environmental gradient (suspended particle concentration), and extended this with host and parasite community data to demonstrate the consequences for a real‐world ecosystem, the Old West River in Cambridgeshire, England.

Both parasites altered the clearance rates of their hosts but in contrasting fashion: while R. campanula increased host clearance rates relative to uninfected conspecifics under all conditions, R. amarus supressed clearance rates at high suspended particle concentrations (eutrophic conditions) but elevated them otherwise. The parasites displayed different infection patterns in the two host species, and the invasive R. amarus rarely co‐infected mussels with R. campanula.

Given their disparate effects, the parasites' distributions reversed the relative filtration capacity of the two host species under high vs. low concentrations of suspended particles, demonstrating how differences between the infection patterns of native and invasive parasites, as well as their individual effects, need to be considered. Overall, the proportion of daily river discharge filtered by the combined mussel community changed by up to 96% in the presence of parasites. By incorporating multiple host species and multiple parasite species, we provide ecologically relevant evidence for the trait‐mediated effects of parasites on ecosystem processes.

Our study demonstrates that parasitism can significantly alter wider ecosystem processes through changing the phenotype of their host. Future work on ecosystem function should take parasitism into account, and consider both trait‐mediated and density‐mediated effects.

Read the free Plain Language Summary for this article on the Journal blog.
Biochemical and structural characterization of the cyanophage‐encoded phosphate‐binding protein: implications for enhanced phosphate uptake of infected cyanobacteria
Authors: Zhao Fangxin , Lin Xingqin , Cai Kun , Jiang YongLiang , Ni Tianchi , Chen Yue , Feng Jianrong , Dang Shangyu , Zhou Cong‐Zhao , Zeng Qinglu 
Published: May 2022

SummaryTo acquire phosphorus, cyanobacteria use the typical bacterial ABC‐type phosphate transporter, which is composed of a periplasmic high‐affinity phosphate‐binding protein PstS and a channel formed by two transmembrane proteins PstC and PstA. A putative pstS gene was identified in the genomes of cyanophages that infect the unicellular marine cyanobacteria Prochlorococcus and Synechococcus. However, it has not been determined whether the cyanophage PstS protein is functional during infection to enhance the phosphate uptake rate of host cells. Here we showed that the cyanophage P‐SSM2 PstS protein was abundant in the infected Prochlorococcus NATL2A cells and the host phosphate uptake rate was enhanced after infection. This is consistent with our biochemical and structural analyses showing that the phage PstS protein is indeed a high‐affinity phosphate‐binding protein. We further modelled the complex structure of phage PstS with host PstCA and revealed three putative interfaces that may facilitate the formation of a chimeric ABC transporter. Our results provide insights into the molecular mechanism by which cyanophages enhance the phosphate uptake rate of cyanobacteria. Phosphate acquisition by infected bacteria can increase the phosphorus contents of released cellular debris and virus particles, which together constitute a significant proportion of the marine dissolved organic phosphorus pool.
New evidence on geographic disparities in United States hospital capacity
Authors: Hegland Thomas A. , Owens Pamela L. , Selden Thomas M. 
Published: May 2022

AbstractObjectiveTo characterize the quantity and quality of hospital capacity across the United States.Data SourcesWe combine a 2017 near‐census of US hospital inpatient discharges from the Healthcare Cost and Utilization Project (HCUP) with American Hospital Association Survey, Hospital Compare, and American Community Survey data.Study DesignThis study produces local hospital capacity quantity and care quality measures by allocating capacity to zip codes using market shares and population totals. Disparities in these measures are examined by race and ethnicity, income, age, and urbanicity.Data Collection/Extraction MethodsAll data are derived from pre‐existing sources. All hospitals and zip codes in states, including the District of Columbia, contributing complete data to HCUP in 2017 are included.Principal FindingsNon‐Hispanic Black individuals living in zip codes supplied, on average, 0.11 more beds per 1000 population (SE = 0.01) than places where non‐Hispanic White individuals live. However, the hospitals supplying this capacity have 0.36 fewer staff per bed (SE = 0.03) and perform worse on many care quality measures. Zip codes in the most urban parts of America have the least hospital capacity (2.11 beds per 1000 persons; SEM = 0.01) from across the rural–urban continuum. While more rural areas have markedly higher capacity levels, urban areas have advantages in staff and capital per bed. We do not find systematic differences in care quality between rural and urban areas.ConclusionsThis study highlights the importance of lower hospital care quality and resource intensity in driving racial and ethnic, as well as income, disparities in hospital care‐related outcomes. This study also contributes an alternative approach for measuring local hospital capacity that accounts for cross‐hospital service area flows. Adjusting for these flows is necessary to avoid underestimating the supply of capacity in rural areas and overestimating it in places where non‐Hispanic Black individuals tend to live.
Enrichment of taste and aroma perceptions in chicken meat stewed in braised soup used repeatedly
Authors: Du Chao , Qi Jun , Yang Cong , Zhang Qingyong , Liu Dengyong 
Published: May 2022

AbstractFlavor enrichment of sauce‐braised chicken creates a popular umami taste and aroma. In order to preliminarily reveal the enrichment of taste and aroma compounds of sauce‐braised meat products processed with braised soup used repeatedly, the system containing only chicken and chicken soup was designed to simulate the process of repeated stewing. Free amino acids, 5‐nucleotides, fatty acids, and volatile compounds in stewed chicken were determined, and taste and aroma profiles were evaluated using an electronic tongue (E‐tongue) and an electronic nose (E‐nose), respectively. As repeated stewing times increased, the total free amino acid content increased from 514.37 mg/100 g to 721.33 mg/100 g, and the contents of 5′‐inosine monophosphate, 5′‐guanosine monophosphate, and 5′‐adenosine monophosphate increased by approximately 20%. Meanwhile, the relative content of saturated fatty acids increased, and the relative content of monounsaturated fatty acids decreased significantly. Oleic acid, linoleic acid, and palmitoleic acid accounted for more than 80% of the total fatty acid content. A total of 15 aroma‐active compounds were identified during repeated stewing, and their concentrations increased by more than 40%, especially for monounsaturated alkenals. Within 10 times of repeated stewing, the taste and aroma compounds were enriched because of a decrease in the concentration difference of taste substances and an increase in the flavor‐adsorption capacity of fat, which was also consistent with the results from the E‐nose and E‐tongue. The taste and aroma of stewed chicken tended to remain constant after 10 times of repeated stewing of braised soup. The obtained information can provide guidelines for regulating the aroma and taste of sauce‐braised chicken.Practical ApplicationThe fat level of stewed chicken and the difference in concentration between stewed meat and braised soup were important potential factors that could be employed to enhance the flavor of stewed meat.
Bee foraging preferences, microbiota and pathogens revealed by direct shotgun metagenomics of honey
Authors: Galanis Anastasios , Vardakas Philippos , Reczko Martin , Harokopos Vaggelis , Hatzis Pantelis , Skoulakis Efthimios M. C. , Pavlopoulos Georgios A. , Patalano Solenn 
Published: May 2022

AbstractHoneybees (Apis mellifera) continue to succumb to human and environmental pressures despite their crucial role in providing essential ecosystem services. Owing to their foraging and honey production activities, honeybees form complex relationships with species across all domains, such as plants, viruses, bacteria and other hive pests, making honey a valuable biomonitoring tool for assessing their ecological niche. Thus, the application of honey shotgun metagenomics (SM) has paved the way for a detailed description of the species honeybees interact with. Nevertheless, SM bioinformatics tools and DNA extraction methods rely on resources not necessarily optimized for honey. In this study, we compared five widely used taxonomic classifiers using simulated species communities commonly found in honey. We found that Kraken 2 with a threshold of 0.5 performs best in assessing species distribution. We also optimized a simple NaOH‐based honey DNA extraction methodology (Direct‐SM), which profiled species seasonal variability similarly to an established column‐based DNA extraction approach (SM). Both approaches produce results consistent with melissopalinology analysis describing the botanical landscape surrounding the apiary. Interestingly, we detected a strong stability of the bacteria constituting the core and noncore gut microbiome across seasons, pointing to the potential utility of honey for noninvasive assessment of bee microbiota. Finally, the Direct‐SM approach to detect Varroa correlates well with the biomonitoring of mite infestation observed in hives. These observations suggest that Direct‐SM methodology has the potential to comprehensively describe honeybee ecological niches and can be tested as a building block for large‐scale studies to assess bee health in the field.
The chromosome‐level genome assembly of the Japanese yellowtail jack Seriola aureovittata provides insights into genome evolution and efficient oxygen transport
Authors: Li Ming , Xu Xiwen , Liu Shanshan , Fan Guangyi , Zhou Qian , Chen Songlin 
Published: May 2022

AbstractFishes of the genus Seriola are widely farmed and highly valued in global aquaculture production. To further understand their economically important traits and help improve aquaculture product quality and sustainability, we performed a chromosome‐level genome construction for Seriola aureovittata. Combining two technologies, PacBio and BGISEQ‐500, we assembled 649.86 Mb S. aureovittata genome sequences with a contig N50 of 22.21 Mb, and 98% of BUSCO genes were detected in total. The initial assembly was then further scaffolded into 24 pseudochromosomes using Hi‐C data, indicating the high quality of the genome. Genome evolution analysis showed that many genes related to fatty acid metabolism and oxygen binding, or transport were expanded, which provided insights into the metabolic characteristics of fatty acids and efficient oxygen transport. Based on the genome data, we confirmed the evolutionary relationship of S. aureovittata, S. dorsalis and S. lalandi and identified chr12 as the putative sex chromosome of S. aureovittata. Our chromosome‐level genome assembly provides a genetic foundation for the phylogenetic and taxonomic investigation of different Seriola species. Moreover, the genome will provide an important genomic resource for further biological and aquaculture studies of S. aureovittata.
Progress in three‐dimensional computed tomography reconstruction in anatomic pulmonary segmentectomy
Authors: Wu Zhe , Huang Zhangfeng , Qin Yi , Jiao Wenjie 
Published: May 2022

AbstractThe number of minimally invasive surgeries, such as video‐assisted thoracoscopic surgery and robot‐assisted thoracoscopic surgery, has increased enormously in recent years. More and more relevant studies report that anatomic pulmonary segmentectomy has the same effect as traditional lobectomy in the surgical treatment of early stage non‐small cell lung cancer (diameter less than 2.0 cm). Segmentectomy requires sufficient knowledge of the location of the pulmonary nodules, as well as the anatomy of the target segments, blood vessels, and bronchi. With the rapid development of imaging technology and three‐dimensional technology, three‐dimensional reconstruction has been widely used in the medical field. It can effectively assess the vascular branching patterns, discover the anatomic variations of the blood vessels and bronchi, determine the location of the lesion, and clarify the division of the segments. Therefore, it is helpful for preoperative positioning, surgical planning, preoperative simulation and intraoperative navigation, and provides a reference for formulating an individualized surgical plan. It therefore plays a positive role in anatomic pulmonary segmentectomy. This study reviews the progress made in three‐dimensional computed tomography reconstruction in anatomic pulmonary segmentectomy.
How age and race affect the frequency, timing, and content of conversations about race with children
Authors: Sullivan Jessica , Wilton Leigh , Apfelbaum Evan P. 
Published: May 2022

AbstractAnti‐racist efforts require talking with children about race. The present work tested the predictors of U.S. adults' (N = 441; 52% female; 32% BIPOC participants; Mage = 35 years) conversations about race with children across two timepoints in 2019. Approximately 60% of adult participants talked to their children (3–12 years) about race during the preceding week; only 29% talked to other adults about race during the same period. This paper describes the content and predictors of conversations about race, revealing how conversations differ depending on the participant's race, a child's age, and whether the conversation occurs with children or another adult. These data have important implications for theorizing about when, why, and how adults actually talk about race with children and adults.