bluuebunny/crossref_metadata_2025_split huggingface dataset:
Trading volume and realized volatility forecasting: Evidence from the China stock market
Authors: Liu Min , Choo Wei‐Chong , Lee Chi‐Chuan , Lee Chien‐Chiang 
Published: July 2022

AbstractThe existing contradictory findings on the contribution of trading volume to volatility forecasting prompt us to seek new solutions to test the sequential information arrival hypothesis (SIAH). Departing from other empirical analyses that mainly focus on sophisticated testing methods, this research offers new insights into the volume‐volatility nexus by decomposing and reconstructing the trading activity into short‐run components that typically represent irregular information flow and long‐run components that denote extreme information flow in the stock market. We are the first to attempt at incorporating an improved empirical mode decomposition (EMD) method to investigate the volatility forecasting ability of trading volume along with the Heterogeneous Autoregressive (HAR) model. Previous trading volume is used to obtain the decompositions to forecast the future volatility to ensure an ex ante forecast, and both the decomposition and forecasting processes are carried out by the rolling window scheme. Rather than trading volume by itself, the results show that the reconstructed components are also able to significantly improve out‐of‐sample realized volatility (RV) forecasts. This finding is robust both in one‐step ahead and multiple‐step ahead forecasting horizons under different estimation windows. We thus fill the gap in studies by (1) extending the literature on the volume‐volatility linkage to EMD‐HAR analysis and (2) providing a clear view on how trading volume helps improve RV forecasting accuracy.
Octopus‐derived antioxidant peptide protects against hydrogen peroxide‐induced oxidative stress in IEC‐6 cells
Authors: Peng Bo , Cai Bingna , Pan Jianyu 
Published: July 2022

AbstractThis study aims to find antioxidant peptides from octopus protein hydrolyzates and verify the protective effects against H2O2‐induced oxidative stress in IEC‐6 cells. After the alcalase hydrolysate was ultrafiltrated, purified by Sephadex G‐25 gel fractionation and semipreparative reversed‐phase high‐performance liquid chromatography (RP‐HPLC), 16 peptides were identified, and chemically synthesized. In particular, the peptides AQNY, AMMLAW, FEGAW, GGAW, VDTVVCVW, and VVCLW showed better oxygen radical absorbance capacity (ORAC) and ABTS radical scavenging capacity. Among them, the smallest‐molecular‐weight peptide GGAW exhibited the best antioxidant activity. Furthermore, GGAW protected IEC‐6 cells from H2O2‐induced oxidative damage by significantly reducing the generation of reactive oxygen species (ROS), malondialdehyde (MDA), and lactate dehydrogenase (LDH), and increasing the activity of superoxide dismutase (SOD) and glutathione peroxidase (GSH‐PX), thereby improving cell viability. These results indicated that the peptide GGAW possessed the antioxidant capacity to prevent oxidative stress damage.
Multiple anthropogenic stressors in the Galápagos Islands' complex social–ecological system: Interactions of marine pollution, fishing pressure, and climate change with management recommendations
Authors: Alava Juan José , McMullen Karly , Jones Jen , Barragán-Paladines María José , Hobbs Catherine , Tirapé Ana , Calle Paola , Alarcón Daniela , Muñoz-Pérez Juan Pablo , Muñoz-Abril Laia , Townsend Kathy Ann , Denkinger Judith , Uyaguari Miguel , Domínguez Gustavo A. , Espinoza Eduardo , Reyes Harry , Piedrahita Paolo , Fair Patricia , Galloway Tamara , Grove Jack Stein , Lewis Ceri , Schofield John 
Published: July 2022

Abstract
For decades, multiple anthropogenic stressors have threatened the Galápagos Islands. Widespread marine pollution such as oil spills, persistent organic pollutants, metals, and ocean plastic pollution has been linked to concerning changes in the ecophysiology and health of Galápagos species. Simultaneously, illegal, unreported, and unregulated fishing are reshaping the composition and structure of endemic and native Galápagos pelagic communities. In this novel review, we discuss the impact of anthropogenic pollutants and their associated ecotoxicological implications for Galápagos species in the face of climate change stressors. We emphasize the importance of considering fishing pressure and marine pollution, in combination with climate-change impacts, when assessing the evolutionary fitness of species inhabiting the Galápagos. For example, the survival of endemic marine iguanas has been negatively affected by organic hydrocarbons introduced via oil spills, and endangered Galápagos sea lions exhibit detectable concentrations of DDT, triggering potential feminization effects and compromising the species' survival. During periods of ocean warming (El Niño events) when endemic species undergo nutritional stress, climate change may increase the vulnerability of these species to the impacts of pollutants, resulting in the species reaching its population tipping point. Marine plastics are emerging as a deleterious and widespread threat to endemic species. The Galápagos is treasured for its historical significance and its unparalleled living laboratory and display of evolutionary processes; however, this unique and iconic paradise will remain in jeopardy until multidisciplinary and comprehensive preventative management plans are put in place to mitigate and eliminate the effects of anthropogenic stressors facing the islands today. We present a critical analysis and synthesis of anthropogenic stressors with some progress from local and international institutional efforts and call to action more precautionary measures along with new management philosophies focused on understanding the processes of change through research to champion the conservation of the Galápagos. Integr Environ Assess Manag 2023;19:870–895. © 2022 SETAC
Medical image contrast enhancement based on improved sparrow search algorithm
Authors: Fan Xiaoyan , Sun Zhanquan , Tian Engang , Yin Zhong , Cao Gaoyu 
Published: July 2022

AbstractThe collection or transmission of medical images is often disturbed by various factors, such as insufficient brightness and noise pollution, which will result in the deterioration of image quality and significantly affect the clinical diagnosis. To improve the quality of medical images, a contrast enhancement method based on improved sparrow search algorithm is proposed in this paper. The method is divided into two steps to enhance the medical images. First, a new transform function is introduced to improve the brightness or contrast of medical images, and two parameters in the transform function are optimized by the improved sparrow search algorithm. Second, adaptive histogram equalization method with contrast limited is used to equalize the result image of the previous step to make the pixel distribution of the image more uniform. Finally, a large number of experiments and qualitative and quantitative analyses were conducted on the common data sets. The analysis results demonstrate that the presented approach outperforms some existing medical image processing approaches.
Do words hurt more than actions? The impact of trade tensions on financial markets
Authors: Ferrari Minesso Massimo , Kurcz Frederik , Pagliari Maria Sole 
Published: July 2022

SummaryWe use machine learning techniques to quantify trade tensions between the United States and China. Our measure matches well‐known events in the US‐China trade dispute and is exogenous to the developments on global financial markets. Local projections show that rising trade tensions leave US markets largely unaffected, except for firms that are more exposed to China, while negatively impacting stock market indices and exchange rates in China and emerging markets. We complement these findings with additional evidence suggesting that the US‐China trade tensions have been interpreted as a negative demand shock for the Chinese economy rather than as a global risk shock.
Study on the mechanism of thrombus ablation in vitro by burst‐mode femtosecond laser
Authors: Zhang Haitao , Liu Xiaozheng , Li Younan , Wu Weiwei , Gu Ying , Zhang Tong 
Published: July 2022

AbstractThe burst‐mode femtosecond laser has the potential to be a novel thrombus removal technique. This paper proposed to investigate the mechanism of thrombus ablation in vitro by burst‐mode femtosecond laser. A simulation model of the interaction between femtosecond laser and thrombus was established. An in vitro thrombus model was prepared. Combined with the high‐speed galvanometer and femtosecond laser, the ablation experiments in vitro were performed. The experimental results showed that the ablative threshold was 0.27 times and the efficiency was about 1.4 times of burst‐mode femtosecond laser as those of traditional mode femtosecond laser. These phenomena were related to the residual temperature and free electrons on the thrombus surface, which confirmed the simulating results and had relationship with incubation effects. The high ablative efficiency and safety of burst‐mode femtosecond laser for thrombus ablation were verified, which may help to achieve the femtosecond pulse output through flexible fiber easily and stably. The burst‐mode femtosecond laser represents an important technological advancement of the method in terms of endovascular treatment with femtosecond laser.
Hip Fractures in Older Adults Are Associated With the Low Density Bone Phenotype and Heterogeneous Deterioration of Bone Microarchitecture
Authors: Whittier Danielle E , Manske Sarah L , Billington Emma , Walker Richard EA , Schneider Prism S , Burt Lauren A , Hanley David A , Boyd Steven K 
Published: July 2022

ABSTRACT
Femoral neck areal bone mineral density (FN aBMD) is a key determinant of fracture risk in older adults; however, the majority of individuals who have a hip fracture are not considered osteoporotic according to their FN aBMD. This study uses novel tools to investigate the characteristics of bone microarchitecture that underpin bone fragility. Recent hip fracture patients (n = 108, 77% female) were compared with sex- and age-matched controls (n = 216) using high-resolution peripheral quantitative computed tomography (HR-pQCT) imaging of the distal radius and tibia. Standard morphological analysis of bone microarchitecture, micro-finite element analysis, and recently developed techniques to identify void spaces in bone microarchitecture were performed to evaluate differences between hip fracture patients and controls. In addition, a new approach for phenotyping bone microarchitecture was implemented to evaluate whether hip fractures in males and females occur more often in certain bone phenotypes. Overall, hip fracture patients had notable deterioration of bone microarchitecture and reduced bone mineral density compared with controls, especially at weight-bearing sites (tibia and femoral neck). Hip fracture patients were more likely to have void spaces present at either site and had void spaces that were two to four times larger on average when compared with non-fractured controls (p &lt; 0.01). Finally, bone phenotyping revealed that hip fractures were significantly associated with the low density phenotype (p &lt; 0.01), with the majority of patients classified in this phenotype (69%). However, female and male hip fracture populations were distributed differently across the bone phenotype continuum. These findings highlight how HR-pQCT can provide insight into the underlying mechanisms of bone fragility by using information about bone phenotypes and identification of microarchitectural defects (void spaces). The added information suggests that HR-pQCT can have a beneficial role in assessing the severity of structural deterioration in bone that is associated with osteoporotic hip fractures. © 2022 The Authors. Journal of Bone and Mineral Research published by Wiley Periodicals LLC on behalf of American Society for Bone and Mineral Research (ASBMR).
Function of normal oral mucosa revealed by single‐cell RNA sequencing
Authors: Zhao Ruowen , Han Wenhao , Tang Kailin , Shao Ruru , Zhu Pingyi , Zhang Shi , Xu Pan , He Yuan 
Published: July 2022

AbstractThe functions of oral mucosa include barrier, sensation, and secretion. The barrier protection function is particularly important, which includes physical barrier and immunological barrier. Few studies have revealed the function of oral mucosa by displaying the map of normal oral mucosal cells from the perspective of single cells. Here, single‐cell transcriptome sequencing was used to bring a relatively comprehensive map of the normal oral mucosal cells. In total, 26,398 cells from three cases of normal oral mucosa were analyzed by single‐cell RNA‐sequencing and 14 distinct cell groups were defined, 7 of which were immune cells. We performed subgroup classification and heterogeneity analysis of epithelial cells, T cells, and macrophagocytes, which found a subpopulation of epithelial cells with high expression of major histocompatibility complex class II molecules, a subpopulation CD8+GZMK+ T cells, and two kinds of active macrophagocytes. Meanwhile, we identified ligand–receptor pairs among the major cell types to explore the interactions and how they maintain the homeostasis of normal oral mucosa. Based on these results, the epithelial barrier function, immunological barrier function, and potential maintenance function of stromal cells in the oral mucosa were described at the single‐cell level, which provides basic data resources for further studies of oral mucosal diseases.
Observers' accuracy in detecting deception in non‐native speakers versus native speakers: A systematic review
Authors: Wylie Keith , Pena Michelle M. , Miller Kevin B. , Palmer Maley E. , Tate Elizabeth 
Published: July 2022

AbstractAs immigration and homeland security become of greater concern both at a global and national level, it is imperative to review existing research on observers' ability to accurately detect deception in non‐native speakers. Objectives of this systematic review were to summarise the evidence on adult observers' ability to accurately detect deception in non‐native speakers compared to native speakers; identify response biases in observers' judgements when judging native versus non‐native speakers' statements; and explore whether differences in observers' deception detection accuracy varies across targets' proficiency levels. Two reviewers independently searched five databases and screened for all quantitative studies that met pre‐selected search criteria. Out of 1885 records identified through database searching, 11 studies met the inclusion criteria. Discriminability for non‐native speakers was above chance in four samples. Most studies found support for a lie bias when judging non‐native speakers and a truth bias when judging native speakers. In addition to further research, these results highlight the need for better reporting of stimuli and observer samples as well as a standardised measure of individuals' proficiency level.
Effect of different ways of ingesting orange essential oil on blood immune index and intestinal microflora in mice
Authors: Qu Sha‐Sha , Zhang Yan , Ren Jing‐Nan , Yang Shu‐Zhen , Li Xiao , Fan Gang , Pan Si‐Yi 
Published: July 2022

AbstractBACKGROUNDStudies have found that the addition of plant essential oils to feed had a positive effect on intestinal microflora and immunity in mice. However, the effect of different ways of ingestion of orange essential oil on mice has seldom been reported. In the present study, we investigated the effects of ingestion of orange essential oil by gavage, sniffing and feeding on intestinal microflora and immunity in mice.RESULTSThe results obtained showed that a low concentration of essential oil feeding significantly increased the spleen index of mice (P < 0.05). The effect of different ways of ingestion on the thymus index, immunoglobulin G and immunoglobulin M of mice was not significant (P > 0.05). High and medium concentrations of essential oil feeding increased the level of interleukin‐2 in mice (P < 0.05). H+K+‐ATPase activity was significantly increased in mice fed with gavage and different concentrations of essential oil feed compared to the control group (P < 0.05). The analysis of the results of the microflora in the cecum and colon of mice indicated that the medium concentration of essential oil feeding group and the sniffing group significantly changed the structure of the flora and increased the diversity of the intestinal microflora. All three essential oil ingestion methods increased the abundance of Bacteroidetes and Lactobacillus in the intestine of mice.CONCLUSIONCompared with gavage and feeding, sniffing had a significant effect on immunoglobulins in mice. All the three ingestion methods could affect the intestinal microflora of mice and increase the abundance of Lactobacillus. © 2022 Society of Chemical Industry.
Comparison of early career researchers and senior career researchers as peer reviewers: A questionnaire survey in China
Authors: Wang Yu , Zhao Liangbin , Zeng Yuanxiang , Cheng Mengyao 
Published: July 2022

AbstractThe article reports results that compare the self‐perceptions of Chinese early career researchers (ECRs) with those of senior career researchers (SCRs) as peer reviewers, aiming to show the characteristics of the increasing number of Chinese ECRs as reviewers. An investigation was conducted with 207 Chinese researchers (including 116 ECRs and 91 SCRs) using an online questionnaire from October to November 2021. The results show the differences and similarities between ECRs and SCRs in five dimensions: views, motivations, preferences, behaviours and self‐confidence. It was found that ECRs are more inclined than SCRs to regard peer review as an extra‐role responsibility. ECRs' self‐focused motivations for peer review are stronger than SCRs' self‐focused motivations, while other‐focused motivations of ECRs and SCRs are equally strong. ECRs are more willing to accept review invitations from high‐quality indexed journals (such as SCI/SSCI/A&HCI journals) than SCRs. In terms of peer review behaviour, ECRs and SCRs have a similar degree of conscientiousness and agreeableness. In addition, ECRs are more lacking in self‐confidence as reviewers than SCRs.
Engaging young scholars in science through publication: A survey analysis of published middle and high school authors
Authors: Mattison Kari A. , Merchak Andrea R. , Wieman Scott T. , Zimmer Stephanie , Fankhauser Sarah C. 
Published: July 2022

AbstractYoung researchers are often excluded from the scholarly processes of peer‐review and publication, which are cornerstones of scholarly work. The Journal of Emerging Investigators is an open access journal dedicated to publishing the research of middle and high school students. We surveyed student authors before and after they participated in the peer‐review and publication process of their scientific articles. Following peer‐review and publication, students report gains in their confidence and self‐efficacy in science, and increased feelings of identity and belonging in science. Our findings demonstrate that even the youngest scholars are capable of participating in the publication process, and our data suggest that participation in the process has positive outcomes.
Temporal and Spatial Relationships of Yellowfin Tuna to Deepwater Petroleum Platforms in the Northern Gulf of Mexico
Authors: Price Melissa E. , Randall Michael T. , Sulak Kenneth J. , Edwards Randy E. , Lamont Margaret M. 
Published: July 2022

Abstract
In 2006–2007, 110 Yellowfin Tuna Thunnus albacares were tagged with acoustic transmitters near deepwater oil platforms and one drillship in the northern Gulf of Mexico off the Mississippi River delta to determine the extent to which platforms act as fish aggregating devices (FADs). Vemco acoustic receivers were installed on six deepwater platforms to detect the presence of tagged individuals. Five of 12 Yellowfin Tuna captured in 2006 were detected in 2007, demonstrating multi-year presence in the region. Ninety Yellowfin Tuna were detected in 2007, resulting in 221 platform residencies and 32 single detections. Duration of residence at a platform was positively correlated with the platform's depth, and the number of transitions decreased with platform-to-platform distance. In total, 109 movements between platforms by 46 (51%) different individuals were detected, traveling distances of up to 98.2 km. Yellowfin Tuna displayed interactions with deepwater platforms in the northern Gulf of Mexico similar to their interactions with FADs and other studied geological features, by way of aggregating or using them as meeting points, landmarks, and stopovers within a movement corridor. The large number of oil and gas platforms located in the northern Gulf of Mexico may have a significant effect on distribution, retention, and migration of Yellowfin Tuna populations in this area of the gulf.
Optimization of Sampling Effort for Different Fishery Groups in the Yangtze River Estuary, China
Authors: Zhao Jing , Yang Keer , Ma Jin 
Published: July 2022

Abstract
The Yangtze River Estuary (YRE) plays an important role in the conservation of fishery resources in the Yangtze River basin, and the Chinese government has established a special fishing ban management area at the YRE. To assess effects of the fishing ban, survey design and appropriate effort need to be determined and implemented. This study used long-term trawl survey data of the YRE (2004–2017) to explore the effects of survey effort (8–30 continuous survey stations selected by systematic and stratified sampling) on precision and accuracy of estimates of abundance of different fishery groups in the YRE. Estimated precision for a given number of survey stations varied by season and fishery group. Precision of systematic sampling fluctuated with the number of stations. Precision of stratified sampling with a proportional allocation scheme gradually increased with the number of survey stations. We suggest including 15–20 survey stations for all fishery groups sampled using the examined sampling methods.This study provides a research reference for selecting the survey effort (number of survey stations) for a fishery-independent survey in the YRE under the backgroud of conservation.