bluuebunny/crossref_metadata_2025 huggingface dataset:
Have housing value indicators changed during COVID? Housing value prediction based on unemployment, construction spending, and housing consumer price index
Authors: Zhang Xingrui , Yang Eunhwa
Published: June 2023

Purpose

Housing market research involves observing the relationships between housing value and its indicators. However, recent literature indicates that the disruption of the COVID-19 pandemic could have an impact on the forecasting properties of some of the housing indicators. This paper aims to observe the relationships between the home value index and three potential indicators to verify their forecasting properties pre- and post-COVID-19 and provide general recommendations for time series research post-pandemic.

Design/methodology/approach

This study features three vector autoregression (VAR) models constructed using the home value index of the USA, together with three indicators that are of interest according to recent literature: the national unemployment rate, private residential construction spending (PRCS) and the housing consumer price index (HCPI).

Findings

Unemployment, one of the prevalent indicators for housing values, was compromised as a result of the COVID-19 pandemic, and a new indicator for housing value in the USA, PRCS, whose relationship with housing value is robust even during the COVID-19 pandemic and HCPI is a more significant indicator for housing value than the prevalently cited All-Item consumer price index (CPI).

Originality/value

The study adds residential construction spending into the pool of housing indicators, proves that the finding of region-specific study indicating the unbounding of housing prices from unemployment is applicable to the aggregate housing market in the USA, and improves upon such widely accepted belief that overall inflation is a key indicator for housing prices and proves that the CPI for housing is a vastly more significant indicator.
Sectoral analysis of capital structure adjustment: evidence from emerging market
Authors: Hegde Apoorva Arunachal , Panda Ajaya Kumar , Masuna Venkateshwarlu
Published: June 2023

Purpose

This paper aims to investigate the non-homogeneity in the speed of adjustment (SoA) of the capital structure of manufacturing companies. It also attempts to study the key determinants that accelerate the speed of adjustment towards the target leverage level.

Design/methodology/approach

Using the dynamic panel fraction (DPF) estimator on the partial adjustment model, the study captures the heterogeneous SoA of 2,866 firms across eight prominent sectors of the Indian manufacturing industry from 2009 to 2020. To ensure robustness, the empirical inferences of DPF are cross-verified with the estimates of panel-corrected standard errors (PCSE).

Findings

The authors find a combination of the capital structure's slow, moderate and rapid adjustment speed along with the relevance of trade-off theory. Interestingly, the lowest and fastest SoA is recorded by the dwindling textile sector and expanding food and agro sector, respectively. Profitability, firm size, asset tangibility and non-debt tax shields are the key firm-specific parameters that impact the SoA towards the target.

Originality/value

Availing the rarely employed estimator ‘DPF’ and the objective of documenting diverse and non-uniform adjustment speeds across the Indian manufacturing sectors marks a novel addition to capital structure literature.
Countering disruptive technologies and entrants: Fujifilm prevails
Authors: Pangarkar Nitin , Prabhudesai Rohit
Published: June 2023

Purpose

This paper argues that when incumbent firms counter disruptive threats head-on, they may fail to develop the required new skills. This paper aims to propose an adjacent strategy which proved useful to Fujifilm to counter disruption of its core business of manufacturing photographic film.

Design/methodology/approach

The study uses an inductive methodology. Based on a detailed case study of Fujifilm, the study proposes two frameworks: for the conditions under which an adjacent strategy is likely to be fruitful and how firms can make the strategy work in their organizations.

Findings

The study finds that an adjacent strategy can be useful to firms under specific circumstances. Not only will the strategy help to counter decline in the core business, but it will also open up new avenues of growth. The success of the strategy requires significant efforts in aligning the leadership and the organization, however.

Practical implications

The frameworks proposed in the study can be useful to incumbent firms in many industries as they battle new disruptive business models and players.

Originality/value

The study’s key argument that incumbent firms can leverage skills from their core business is novel. The study also proposes frameworks that can help firms decide whether an adjacent strategy is appropriate for them and how they can implement it.
How do influencers’ characteristics affect followers’ stickiness and well-being in the social media context?
Authors: Lu Hsiao-Han , Chen Ching-Fu
Published: June 2023

Purpose

Drawing on source credibility theory, this study aims to explore the relationship between influencers’ characteristics and followers’ well-being through followers’ stickiness to influencers’ channels or posts.

Design/methodology/approach

The authors gathered data through an online survey of 450 followers. The proposed hypotheses were examined using structural equation modeling.

Findings

Results reveal that trustworthiness and physical attractiveness positively affect followers’ stickiness to influencers, while the influence of expertise is not evident. Stickiness has positive impacts on both hedonic and eudaimonic well-being. The findings also show that stickiness mediates the relationships between physical attractiveness and trustworthiness toward both hedonic and eudaimonic well-being.

Originality/value

To the best of the authors’ knowledge, this study is among the first to explore the impact of influencers’ characteristics on followers’ stickiness to influencer webpages. The findings contribute to transformative service research and the theory of stickiness by deepening the understanding of how influencer characteristics contribute to followers’ well-being through the effect of users’ stickiness.
Supervisor incivility, ruminations and insubordination: catalytic effects of supervisor task conflict
Authors: De Clercq Dirk , Azeem Muhammad Umer , Haq Inam Ul
Published: June 2023

Purpose

This study aims to investigate the relationship between employees' exposure to supervisor incivility and their engagement in insubordinate behavior, by detailing a mediating role of ruminations about interpersonal offenses and a moderating role of supervisor task conflict.

Design/methodology/approach

The research hypotheses were assessed with three rounds of data, obtained from employees and their peers, working for firms in various industries.

Findings

An important reason that employees' sense that their supervisor treats them disrespectfully escalates into defiance of supervisor authority is that the employees cannot stop thinking about how they have been wronged. The mediating role of such ruminations is particularly prominent when employees' viewpoints clash with those of their supervisor.

Practical implications

A critical danger exists for employees who are annoyed with a rude supervisor: They ponder their negative treatment, which prompts them to disobey, a response that likely diminishes the chances that supervisors might change their behaviors. This detrimental process is particularly salient when employee–supervisor interactions are marked by unpleasant task-related fights.

Originality/value

This study unpacks an unexplored link between supervisor incivility and supervisor-directed insubordination by explicating the pertinent roles of two critical factors (rumination and task conflict) in this link.
A narrative review of the effect of sport and exercise on ADHD symptomatology in children and adolescents with ADHD
Authors: Meggs Jenny , Young Susan , Mckeown Annette
Published: June 2023

Purpose

Attention deficit hyperactivity disorder (ADHD) is a common neurodevelopmental condition with community prevalence globally of 2%–7% (M = 5%; Sayal et al., 2018). Clinicians are routinely encouraged to explain to children and young people the benefits of a healthy lifestyle, including exercise (NICE NG87, 2018). Exercise has been proposed as a safe and low-cost adjunctive approach for ADHD and is reported to be accompanied by positive effects on several aspects of executive functioning (EF). The purpose of this narrative review was to synthesise the contemporary randomised control trial (RCT) studies that examine the effect of sport, physical activity and movement on EF in children and adolescents with ADHD.

Design/methodology/approach

A narrative review approach with a systematic literature search using PRISMA guidelines for screening and selecting relevant systematic reviews was used. The final review included four peer-review systematic reviews (>2019).

Findings

The results identified four RCT meta-analyses and findings showed that children and adolescents with lower baseline cognitive performance demonstrated greater improvements in functioning after physical activity interventions, particularly for tasks with higher executive function demands, where baseline performance reaches an optimal level. Findings suggest that 10–20 min of acute moderate-high-intensity exercise interventions (cycling/running) appeared to have positive effects on indices of inhibitory control. Preliminary evidence suggests that as little as 5 min of jumping exercises improved inhibitory control. Sixty to eighty minutes of moderately intense, repeated (chronic) exercise appeared to demonstrate the greatest beneficial impact on selective attention.

Originality/value

To the best of the authors’ knowledge, this review is the first to present the extant literature on the effect of physical activity and sport on symptoms of young people with ADHD. It presents evidence to suggest that exercise with progressively increasing cognitive demands may have positive effects for children with ADHD, specifically in terms of improving cognitive flexibility. Further large-scale clinical trials are needed to confirm the positive effects of physical exercise on cognitive functioning in children with ADHD.
Research on assembly accuracy of deployable arm based on Jacobian-Torsor model
Authors: Lu Ligang , Li Pengfei , Wu Dongbo , Liang Jiawei , Wang Hui , He Pengpeng
Published: June 2023

Purpose

The purpose of this study is to establish an assembly accuracy analysis model of deployable arms based on Jacobian–Torsor theory to improve the assembly accuracy. Spacecraft deployable arm is one of the core components of spacecraft. Reducing the errors in assembly process is the main method to improve the assembly accuracy of spacecraft deployable arms.

Design/methodology/approach

First, the influence of composite connecting rod, root joint and arm joint on assembly accuracy in the tandem assembly process is analyzed to propose the assembly accuracy analysis model. Second, a non-tandem assembly process of “two joints fixed-composite rod installed-flange gasket compensated” is proposed and analyzed to improve the assembly accuracy of deployable arms. Finally, the feasibility of non-tandem assembly process strategy is verified by assembly experiment.

Findings

The experiential results show that the assembly errors are reduced compared with the tandem assembly process. The errors on axes x, y and z directions decreased from 14.1009 mm, 14.2424 mm and 0.8414 mm to 0.922 mm, 0.671 mm and 0.2393 mm, respectively. The errors round axes x and y directions also decreased from 0.0050° and 0.0053° to 0.00292° and 0.00251°, respectively.

Originality/value

This paper presents an assembly accuracy analysis model of deployable arms and applies the model to calculate assembly errors in tandem assembly process. In addition, a non-tandem assembly process is proposed based on the model. The experimental results show that the non-tandem assembly process can improve the assembly accuracy of deployable arms.
Monitoring energy usage of heavy-haul iron ore trains with on-board energy meter for improving energy efficiency
Authors: Geiberger Philipp , Liu Zhendong , Berg Mats , Domay Christoph
Published: June 2023

Purpose

For billing purposes, heavy-haul locomotives in Sweden are equipped with on-board energy meters, which can record several parameters, e.g., used energy, regenerated energy, speed and position. Since there is a strong demand for improving energy efficiency in Sweden, data from the energy meters can be used to obtain a better understanding of the detailed energy usage of heavy-haul trains and identify potential for future improvements.

Design/methodology/approach

To monitor energy efficiency, the present study, therefore, develops key performance indicators (KPIs), which can be calculated with energy meter data to reflect the energy efficiency of heavy-haul trains in operation. Energy meter data of IORE class locomotives, hauling highly uniform 30-tonne axle load trains with 68 wagons, together with additional data sources, are analysed to identify significant parameters for describing driver influence on energy usage.

Findings

Results show that driver behaviour varies significantly and has the single largest influence on energy usage. Furthermore, parametric studies are performed with help of simulation to identify the influence of different operational and rolling stock conditions, e.g., axle loads and number of wagons, on energy usage.

Originality/value

Based on the parametric studies, some operational parameters which have significant impact on energy efficiency are found and then the KPIs are derived. In the end, some possible measures for improving energy performance in heavy-haul operations are given.
Colonising the penal body: transit of the convicts from Bengal to the Malay Peninsula
Authors: Rahman Gazi Mizanur
Published: June 2023

Purpose

The British East India Company (EIC) made connections between the Malay Archipelago and Bengal and established a penal settlement at Bencoolen, followed by the Straits Settlements for the Indian convicts. The convicts from different parts of South Asia today were generally described as “Indian”, such generalisation often hides the identity of specific convicts from South Asia. Among the Indian convicts, the Bengalis were transported to Bencoolen and the Straits Settlements. However, the generic term has made it difficult to reconstruct the history of Bengali convicts’ experiences and pathos. Therefore, this paper attempts to “rediscover” the afterlife of transportation of Bengali felons in the Malay Peninsula.

Design/methodology/approach

By examining a range of archival records and current scholarships, this article shows the inclusivity, diversity and accessibility of convict labourers with mainstream society. This study will open up a new avenue of convict histories and subaltern studies on Asia.

Findings

The Bengali convicts in the Straits Settlements, one of the oldest migrant sections, have largely been ignored in historical literature. Though the Bengalis, among other South Asian convicts, constituted a significant portion, they were categorised under the generic term “Indian” (Rai, 2014). Their manual labour was invaluable for the colonial economy and the development of the Straits Settlements.

Research limitations/implications

Researcher faced difficulties to get the descendant of Bengali convicts.

Originality/value

This article is a research paper based on mostly archival records; therefore, it is an original contribution to the existing knowledge on the convict history.
Pediatric extracorporeal life support for refractory status asthmaticus: ELSO Registry trends from the past decade
Authors: Setlur Anuradha , Meyer Marisa , Nelson Jennifer S. , Liedel Jennifer L. , Kahana Madelyn , Maul Timothy M.
Published: June 2023

Background

Extracorporeal life support (ECLS) for status asthmaticus (SA) is rare. Increased safety and experience may increase utilization of ECLS for SA.

Methods

We reviewed pediatric (<18 years old) patients requiring ECLS for SA between 1998 and 2019 within the Extracorporeal Life Support Organization (ELSO) Registry and Nemours Children's Health (NCH) system. We compared patient characteristics, pre‐ECLS medications, clinical data, complications, and survival to discharge between Early (1988–2008) and Late (2009–2019) eras.

Results

From the ELSO Registry, we identified 173 children, 53 in Early and 120 in Late eras, with primary diagnosis of SA. Pre‐ECLS hypercarbic respiratory failure was similar between eras (median pH 7.0 and pCO2 111 mm Hg). Venovenous mode (79% vs. 82%), median ECLS time (116 vs. 99 h), time to extubation (53 vs. 62 h), and hospital survival (89% vs. 88%) also remained similar. Intubation to cannulation time significantly decreased (20 vs. 10 h, p = 0.01). ECLS without complication occurred more in the Late era (19% vs. 39%, p < 0.01), with decreased hemorrhagic (24% vs. 12%, p = 0.05) and noncannula‐related mechanical (19% vs. 6%, p = 0.008) complications. Within NCH, we identified six Late era patients. Pre‐ECLS medication favored intravenous beta agonists, bronchodilators, magnesium sulfate, and steroids. One patient died from neurological complications following pre‐ECLS cardiac arrest.

Conclusions

Collective experience supports ECLS as a rescue therapy for pediatric SA. Survival to discharge remains good, and complication rates have improved. Pre‐ECLS cardiac arrest may potentiate neurologic injury and impact survival. Further study is needed to evaluate causal relationships between complications and outcomes.
Elementary disruptions? Exploring residential move type, timing, and duration of implications during middle childhood
Authors: Anastasio R. Julius , Leventhal Tama
Published: June 2023

Moving is common during middle childhood, but links between move type and children's development are less well understood. Using nationally‐representative, longitudinal data (2010–2016) of ~9900 U.S. kindergarteners (52% boys, 51.48% White, 26.11% Hispanic/Latino, 10.63% Black, 11.78% Asian/Pacific Islander), we conducted multiple‐group fixed‐effects models estimating associations of within‐ and between‐neighborhood moves, family income, and children's achievement and executive function, testing whether associations persisted or varied by developmental timing. Analyses suggest important spatial and temporal dimensions of moving during middle childhood: between‐neighborhood moves had stronger associations than within‐neighborhood moves, earlier moves benefited development whereas later moves did not, and associations persisted with significant effect sizes (cumulative Hedges' g = −0.09–1.35). Research and policy implications are discussed.
Pathogenic bi‐allelic variants of meiotic ZMM complex gene SPO16 in premature ovarian insufficiency
Authors: Qi Yu , Wang Yiyang , Li Weilin , Zhuang Shuning , Li Shan , Xu Keyan , Qin Yingying , Guo Ting
Published: June 2023

Premature ovarian insufficiency (POI) is a heterogeneous disease affecting the physical and mental health of millions of women worldwide. The contribution of genetic factors in the pathogenesis of POI has increased, with quite a few of causative genes involved in meiosis. ZMM proteins are a group of conserved proteins participating in meiotic synapsis and crossover maturation. Here, by screening the variations of ZMM genes in our in‐house WES database of 1030 idiopathic POI patients, one novel homozygous variation in SPO16 (c.160 + 8A > G) was firstly identified in one patient. The variation was verified to disturb mRNA splicing by minigene assay, produced a non‐functional SPO16 protein, and was classified as pathogenetic according to American College of Medical Genetics guideline. During meiotic prophase I, SHOC1 binds to branched DNA and recruits SPO16 and other ZMM proteins to facilitate crossover formation. Together with our recent identified bi‐allelic variations of SHOC1 in a published work, this study highlighted the essential roles of ZMM genes in the maintenance of ovarian function and expanded the POI gene spectrum.
Color capital: Examining the racialized nature of beauty via colorism and skin bleaching
Authors: Ellis Natasha P. , Destine Shaneda
Published: June 2023

Colorism, like whiteness is capital, is rooted in the institution of slavery and has resulted in the preference of light skin. Because colorism is part of the historical construction of whiteness, the consumption of whiteness is commodified through various markets. Current manifestations of racialized beauty, that is, skin bleaching and photo editing apps such as FaceTune and Snap Chat reinforce colorism and impact conceptualizations of beauty. This literature review surveys how colorism and racialized beauty are reproduced to reinforce whiteness as a form of capital.
Wall Shear Stress Distribution of non-Newtonian Blood Flow in Stenosed Bifurcated Artery
Authors: Mohd Zain Norliza , Ismail Zuhaila , Ahmad Jamali Muhammad Sabaruddin , Lim Yeou Jiann
Published: June 2023

Localized plaque causes narrowing of the arterial wall, resulting in an alteration in the flow structure, reducing the flow of fluids reaching the heart and resulting in heart attacks. The formation of stenosis could disturb the normal hemodynamics in blood rheology. A bifurcated artery with different types of stenosis is considered in order to illustrate the four possible formations of plaque between healthy and diseased arteries. Due to the fact that a diseased artery is reported to be less compliant, the artery wall is modelled as a two-dimensional rigid wall. In this model, blood flow is assumed to be steady, laminar, incompressible, and characterized as a generalized power-law model that is non-Newtonian in nature. The numerical simulation is performed using COMSOL Multiphysics, which is based on finite element method. Based on simulation results, different types of stenosis in the bifurcated artery have a significant impact on velocity profiles and wall shear stresses.
Ultimate Strength of a Thin Wall Tee for Sodium Cooled Fast Reactors Under Seismic Loads
Authors: Watakabe Tomoyoshi , Takahashi Hideki
Published: June 2023

It is a key issue to clarify failure mode of piping in nuclear power plants and its safety margin included in the design practice. In this study, a series of dynamic failure tests of a thin wall tee for sodium-cooled fast reactors was conducted. Some discussions related to the thin wall tee are provided on the failure mode under seismic load, dynamic response behavior, accuracy of fatigue prediction by dynamic elastic-plastic analysis, and a safety margin of fatigue evaluation which is included in conventional design rule.
Anti-Biofilm Enzymes-Assisted Antibiotic Therapy against Burn Wound Infection by Pseudomonas aeruginosa
Authors: Zhang Yixin , Liu Xiaolong , Wen Huamei , Cheng Zhongle , Zhang Yanyu , Zhang Haichuan , Mi Zhongwen , Fan Xinjiong
Published: June 2023

Pseudomonas aeruginosa
can form biofilms at the site of burn wound, leading to infection and the failure of treatment regimens. The previous
in vitro
study demonstrated that a combination of the quorum-quenching enzyme AidH
A147G
and the extracellular matrix hydrolase PslG was effective in inhibiting biofilm and promoting antibiotic synergy.
A Programmable CRISPR/Cas9 Toolkit Improves Lycopene Production in Bacillus subtilis
Authors: Liu Yang , Cheng Haijiao , Li Haoni , Zhang Yingzhe , Wang Meng
Published: June 2023

We present a toolkit that allows for rapid cloning procedures and one-step subcloning to move from plasmid-based expression to stable chromosome integration and expression in a production strain in less than a week. The utility of the customized tool was demonstrated by integrating the MEP (2C-methyl-
d
-erythritol-4-phosphate) pathway, part of the pentose phosphate pathway (PPP), and the hetero-lycopene biosynthesis genes by stable expression in the genome.
Expressing Parasitoid Venom Protein VRF1 in an Entomopathogen
Beauveria bassiana
Enhances Virulence toward Cotton Bollworm
Helicoverpa armigera
Authors: Zeng Shuocheng , Lin Zhe , Yu Xianhao , Zhang Junjie , Zou Zhen
Published: June 2023

Mycoinsecticides are essential for the development of integrated pest management as substitutes to chemical insecticides, but their usage is limited by their inferior virulence. Thus, genetically engineered bioinsecticides, including recombinant entomopathogenic fungi, have been regarded as a breakthrough to rapidly control pests.
Temporal Variations in the Gut Microbiota of the Globally Endangered Sichuan Partridge (Arborophila rufipectus): Implications for Adaptation to Seasonal Dietary Change and Conservation
Authors: Tang Keyi , Tao Ling , Wang Yufeng , Wang Qiong , Fu Changkun , Chen Benping , Zhang Zhengwang , Fu Yiqiang
Published: June 2023

Characterizing the gut microbiotas of wild birds across seasons will shed light on their annual life cycle. Due to sampling difficulties and the lack of detailed dietary information, studies on how the gut microbiota adapts to seasonal dietary changes of wild birds are scarce.
Two MP2CL5 Antigen Vaccines from Naegleria fowleri Stimulate the Immune Response against Meningitis in the BALB/c Model
Authors: Gutiérrez-Sánchez Mara , Carrasco-Yépez María Maricela , Correa-Basurto José , Ramírez-Salinas Gema Lizbeth , Rojas-Hernández Saúl
Published: June 2023

Naegleria fowleri
is an etiological agent that generates primary amoebic meningoencephalitis; unfortunately, no effective treatment or vaccine is available. The objective of this work was to determine the immunoprotective response of two vaccine antigens, as follows: (i) the polypeptide band of 19 kDa or (ii) a predicted immunogenic peptide from the membrane protein MP2CL5 (Smp145).
Complete Genome Assembly and Annotation of Escherichia coli Bacteriophage 55 from Rivière la Quint in Gonaïves, Haiti
Authors: Schwarz Joshua C. , An William , Theroux Austen , Vargas Luz D. , Chan Benjamin K. , Turner Paul E. , Burmeister Alita R.
Published: June 2023

We present the structural and functional annotation of
Escherichia coli
bacteriophage 55, which has a genome length of 170,393 bp, with 219 predicted genes.
Metaproteomics reveals functional partitioning and vegetational variation among permafrost-affected Arctic soil bacterial communities
Authors: Miller Samuel E. , Colman Albert S. , Waldbauer Jacob R.
Published: June 2023

Microbial activity in Arctic soils controls the cycling of significant stores of organic carbon and nutrients. We studied
in situ
processes in Alaskan soils using original metaproteomic methods in order to relate important heterotrophic functions to microbial taxa and to understand the microbial response to Arctic greening. Major bacterial groups show strong metabolic specialization in organic topsoils. α-/β-/γ-Proteobacteria specialized in the acquisition of small, soluble compounds, whereas Acidobacteria, Actinobacteria, and other detritosphere groups specialized in the degradation of plant-derived polymers. α-/β-/γ-Proteobacteria dominated the expression of transporters for common root exudates and limiting nitrogenous compounds, supporting an ecological model of dependence upon plants for carbon and competition with plants for nitrogen. Detritosphere groups specialized in distinct substrates, with Acidobacteria producing the most enzymes for hemicellulose depolymerization. Acidobacteria was the most active group across the three plant ecotypes sampled—the largely nonvascular, lower biomass intertussock and the largely vascular, higher biomass tussock and shrub. Functional partitioning among bacterial groups was stable between plant ecotypes, but certain functions associated with α-/β-/γ-Proteobacteria were more strongly expressed in higher biomass ecotypes. We show that refined metaproteomic approaches can elucidate soil microbial ecology as well as biogeochemical trajectories of major carbon stocks.

IMPORTANCE

The Arctic is warming twice as fast as the rest of the planet, and Arctic soils currently store twice as much carbon as the entire atmosphere—two facts that make understanding how Arctic soil microbial communities are responding to climate change particularly urgent. Greening of vegetation cover across the Arctic landscape is one of the most prominent climate-driven shifts in Arctic terrestrial ecology, with potentially profound effects on biogeochemical cycling by the soil microbiome. Here we use metaproteomics to document microbial metabolic functions that drive soil carbon and nutrient cycling processes in an Arctic tundra landscape. We identify functional roles among bacterial taxonomic groups that are largely stable across vegetation types, with certain functions strongly expressed by rhizosphere groups reflecting a community metabolic response to greening.
Functional Characterization of FeoAB in Iron Acquisition and Pathogenicity in Riemerella anatipestifer
Authors: Huang Mi , Wang Mengying , Feng Yan , Wang Mingshu , Gao Qun , Zhu Dekang , Jia Renyong , Chen Shun , Zhao Xinxin , Yang Qiao , Wu Ying , Zhang Shaqiu , Tian Bin , Huang Juan , Ou Xumin , Mao Sai , Sun Di , He Yu , Wu Zhen , Cheng Anchun , Liu Mafeng
Published: June 2023

In Gram-negative bacteria, the Feo system is an important ferrous iron transport system.
R. anatipestifer
encodes an Feo system, but its function unknown. As iron uptake may be required for oxidative stress protection and virulence, understanding the contribution of iron transporters to these processes is crucial.
Structural Analysis and Chronologic Constraints on Progressive Deformation within the Rincon Mountains, Arizona: Implications for Development of Metamorphic Core Complexes
Authors: Davis George H. , Orent Eytan Bos , Clinkscales Christopher , Ferroni Felipe R. , Gehrels George E. , George Sarah W.M. , Guns Katherine A. , Hanagan Catherine E. , Hughes Amanda , Iriondo Alexander , Jepson Gilby , Kelty Clay , Krantz Robert W. , Levenstein Brandon M. , Lingrey Steve H. , Miggins Daniel P. , Moore Timothy , Portnoy Samantha E. , Reeher Lauren , Wang Jordan W.
Published: June 2023

The Catalina-Rincon metamorphic core complex (Tucson, Arizona, USA) is a type Cordilleran metamorphic core complex. This volume draws together decades of investigations into the geology of the Rincons, and presents results of multi-scale mapping and structural analysis of the Catalina detachment zone, a superbly exposed crustal-scale shear zone. A structural model for progressive incremental deformation synthesizes geological observations into a kinematic/mechanical framework. To this is added the first substantive application of multi-method geochronology and thermochronology, results of which place the evolution of the detachment zone (from mylonitization through cataclasis to exhumation) into a narrow time window, i.e., from ca. 26 to 17 Ma.
The physiological state of four commercially important bivalve species during a naturally occurring heatwave
Authors: Talevi Jasmine , Steeves Laura , Coffin Michael , Guyondet Thomas , Sakamaki Takashi , Comeau Luc , Filgueira Ramón
Published: June 2023

Shallow coastal environments are becoming more susceptible to marine heatwaves, particularly in Atlantic Canada, which is experiencing higher rates of ocean warming compared with the global average. Understanding bivalves’ tolerance to heatwaves in Atlantic Canada is especially important, given the magnitude of bivalve aquaculture in this region. In this study, the physiological state of four commercially important bivalve species—blue mussel ( Mytilus edulis Linnaeus, 1758), eastern oyster ( Crassostrea virginica (Gmelin, 1791)), soft shell clam ( Mya arenaria Linnaeus, 1758), and hard clam ( Mercenaria mercenaria (Linnaeus, 1758))—was observed during a naturally occurring heatwave in Prince Edward Island, Canada. The metabolism, feeding physiology, and scope for growth of each species were compared. Results from this study, and comparisons with the literature, show interspecific variability in the metabolic rate and feeding physiology between species, but generally oysters, soft shell clams, and hard clams were less impacted during the heatwave compared with the blue mussels. Additionally, only the scope for growth of mussels declined throughout this experiment, which may be explained by cumulative heat stress, as temperatures experienced during this heatwave exceeded the thermal tolerance limits of mussels.
MAX IV Laboratory
Authors: Robert Aymeric , Cerenius Yngve , Tavares Pedro Fernandes , Hultin Stigenberg Anna , Karis Olof , Lloyd Whelan Ann-Christine , Runéus Caroline , Thunnissen Marjolein
Published: June 2023

MAX IV Laboratory is a Swedish national synchrotron radiation facility that comprises three accelerators with varying characteristics. One of the accelerators, the 3 GeV storage ring, is the world’s first fourth-generation ring and pioneered the use of the multibend achromat lattice to provide access to ultrahigh brightness X-rays. MAX IV aims to stay at the forefront of the current and future research needs of its multidisciplinary user community, principally located in the Nordic and Baltic regions. Our 16 beamlines currently offer and continue to develop modern X-ray spectroscopy, scattering, diffraction, and imaging techniques to address scientific problems of importance to society.
INTELLECTUAL CAPITAL AND CORPORATE PERFORMANCE IN MALAYSIA: EXPLORING NONLINEARITY AND SYNERGY EFFECTS
Authors: ASIF JAWAD , TING IRENE WEI KIONG , LEAN HOOI HOOI , KWEH QIAN LONG
Published: June 2023

Inconsistent results of the impacts of intellectual capital (IC) investments on firm performance have raised question regarding the pros and cons of IC investments. However, analyzing the relationship between IC and firm performance from a nonlinear perspective remains under-researched. Hence, this paper aims to examine whether IC investments have a nonlinear relationship with firm performance. This study also examines the interaction effects of IC components on firm performance. We undertake the data that ranges from 2009–2022 on Malaysian public listed firms. The study separates the data into two periods, one without COVID-19 impact (2009–2018) and the other with COVID-19 impact (2019–2022), to examine the potential impact of IC to firm performance with and without the presence of COVID-19 pandemic. The study utilizes panel data regression method to analyze the hypothesized relationships. The results indicate that the relationship between IC components and firm performance is nonlinear when COVID-19 is not present, but this relationship changes in the presence of COVID-19 impact. That is, although continuous IC investments can be a safe investment strategy, their positive impacts on firm performance lose initial strength after a certain critical level of IC investments. Based on the findings, Malaysian public listed firms need to have skilled and intellectual labor force to support the transition from labor intensive industries to knowledge-intensive industries. Moreover, tangible investments play a contributing role in intangible investments. Managers should be careful in investing both physical and financial resources as their marginal costs may outweigh marginal benefits. Overall, this study is helpful to the managers and policy makers in deciding the optimal level of IC investments. The advice can also be taken with respect to combinations of elements of IC.
Single Machine Scheduling with Rejection and a Non-Availability Interval to Minimize the Maximum Delivery Completion Time Plus the Total Rejection Cost
Authors: Zuo Lili , Lu Lingfa , Zhang Liqi
Published: June 2023

In this paper, we consider the single machine scheduling with rejection and a nonavailability interval. Two types of non-availability intervals are studied, namely the machine non-availability (MNA) intervals and the operator non-availability (ONA) intervals. The objective is to minimize the sum of the maximum delivery completion time of accepted jobs and the total rejection cost of rejected jobs. For these two problems, a pseudo-polynomial-time dynamic programming algorithm and a fully polynomial-time approximation scheme (FPTAS) are proposed, respectively.
Entropy and its conservation in expanding Universe
Authors: Aoki Sinya , Kawana Kiyoharu
Published: June 2023

In this paper, we investigate properties of the conserved charge in general relativity, recently proposed by one of the present authors with his collaborators, in the inflation era, the matter dominated era and the radiation dominated era of the expanding Universe. We show that the conserved charge in the inflation era becomes the Bekenstein–Hawking entropy for de Sitter space, and it becomes the matter entropy and the radiation entropy in the matter and radiation dominated eras, respectively, while the charge itself is always conserved. These properties are qualitatively confirmed by a numerical analysis of a model with a scalar field and radiations. Results in this paper provide more evidences on the interpretation that the conserved charge in general relativity corresponds to entropy.
Quality Inspection of 3D Printed Tubular Tissue Based on Machine Vision
Authors: Wu Xiaoyan , Wang Shu
Published: June 2023

This study investigated the three-dimensional (3D) printing of tubular tissue, especially vascular tissue, using a self-developed 3D bioprinter platform and tubular tissue support frame system based on machine vision technology. A 3D printing quality inspection scheme for tubular tissue based on machine vision was proposed by combining the current advanced image acquisition sensor device and theoretical and experimental analysis to measure the printing area in real time. A quantitative relationship between the quality of the tissue profile and the angle and brightness of tissue printed by hydrogel was established by changing the process parameters. A mathematical model for the visual inspection of tissue contour quality was established to realize its visual inspection and evaluation. This method can monitor the quality status of the printing target in real time and provide a basis for improving the accuracy of 3D bioprinting of tubular tissue and shortening the printing time.
Dynamical system approach of interacting dark energy models with minimally coupled scalar field
Authors: Samaddar Amit , Singh S. Surendra , Alam Md Khurshid
Published: June 2023

We investigated the stability condition of [Formula: see text] gravity theory with interacting and noninteracting models by using dynamical system. We assume the [Formula: see text] function as [Formula: see text], where [Formula: see text] is the free parameter. We evaluated the critical points for this model and examined the stability behavior. We found two stable critical points for interacting model. The phase plots for this system are examined and the physical interpretation is discussed. We illustrate all the cosmological parameters such as [Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text] at each fixed point and compare the parameters with observational values. Further, we assume hybrid scale factor and the equation of redshift and time is [Formula: see text]. We transform all the parameters in terms of redshift by using this equation and examine the behavior of these parameters. Our model represents the accelerated expansion of the universe. The energy conditions are examined in terms of redshift and strong energy conditions are not satisfied for the model. We also find the statefinder parameters [Formula: see text] in terms of z and discuss the nature of r–s and r–q plane. For both pairs [Formula: see text] and [Formula: see text] our model represents the [Formula: see text]CDM model. Hence, we determine that our [Formula: see text] model is stable and it satisfies all the observational values.
STRUCTURES, ELECTRONIC AND MAGNETIC PROPERTIES OF THE TM(ISQ)2 CLUSTERS
Authors: ZHAO ZHEN , LI ZHI
Published: June 2023

The structures, electronic and magnetic properties of the TM(isq)2 ([Formula: see text]-diiminobenzosemiquinonate) clusters have been investigated by using the PBE functional. The lengths of TM-N bonds of the TM(isq)2 clusters are as follows: 3[Formula: see text]. According to the binding energies per atom of the TM(isq)2 clusters, the 5d TM(isq)2 clusters are more structurally stable than the corresponding 3d TM(isq)2 and 4d TM(isq)2 clusters except for the Lu(isq)2 and Hg(isq)2 clusters. According to the HOMO–LUMO gaps of the TM(isq)2 clusters, the 5d TM(isq)2 clusters are more kinetically stable than corresponding 3d TM(isq)2 and 4d TM(isq)2 clusters except for the Lu(isq)2 and W(isq)2 clusters. As for the TM(isq)2 clusters, the TM atoms lose a small amount of electrons within the scope of [Formula: see text]. Maximum Mülliken spin densities ([Formula: see text] and [Formula: see text]) of TM atoms of the TM(isq)2 clusters occur at Cr, Co, Mo and W.
ROLES OF SPINAL OSTEOTOMIES ON CORRECTION OF POST-TRAUMATIC THORACOLUMBAR KYPHOSIS
Authors: Hsu Jui-Yo , Chen Chih-Wei , Huang Chuan-Ching , Hu Ming-Hsiao , Yang Shu-Hua
Published: June 2023

Thoracolumbar (T–L) fracture may create focal kyphosis accompanied by altered sagittal alignment, instability and potential neurological deficits. Surgical intervention for post-traumatic T–L kyphosis aims to restore sagittal balance, release compromised neural structures, and to improve the symptoms related to the malalignment. It is best indicated when there is a progression of kyphotic deformity, and/or when there are new or progressive neurological deficits. A kyphotic deformity [Formula: see text] is susceptible to persistent chronic pain in the kyphotic region and surgical correction is often required. Those with posterior ligamentous complex injury may also warrant surgical correction as there is a higher risk of kyphosis progression. A number of surgical procedures could be employed to correct post-traumatic T–L kyphosis. Spinal osteotomies are often needed to improve global, sagittal or coronal balance including in the late and fixed post-traumatic kyphosis. Based on different extent of focal kyphosis and global malalignment, surgical options may include posterior column osteotomy (PCO), pedicle subtraction osteotomy (PSO), disc-bone osteotomy (DBO), vertebral column resection (VCR) or closing opening wedge osteotomy (COWO). The type of spinal osteotomy utilized to correct post-traumatic T–L kyphosis should be chosen based on the severity of the deformity, the alignment of the spine, and the surrounding structures. In the meantime, potential complications should be reduced with novel techniques and proper constructs. When all associated factors are considered, surgical correction composing a suitable spinal osteotomy can be a beneficial and rewarding procedure for patients with post-traumatic T–L kyphosis.
IMMEDIATE EFFECT OF THREE METHODS OF NEURODYNAMIC TISSUE MOBILIZATION EXERCISES ON THE WALKING CAPACITY AMONG PATIENTS HAVING NEUROGENIC CLAUDICATION
Authors: Aggarwal Anoop , Yadav Shweta , Tiwari Madhusudan , Mathur Ashwani Kumar , Chauhan Manda
Published: June 2023

Purpose: Neurogenic claudication presents itself as leg pain, paresthesia or cramp reproduced by walking and reduced by rest. It occurs more commonly in spinal canal Stenosis and the surgical decompression of the spine in this condition is rarely required. Nerve tissue may develop dynamic dysfunction such as adhesion and neural fibrosis can impair nerve mobility. Neurodynamic mobilization methods may enhance the neural tissue mobility and enhance physical function. The aim of this study was to explore the role of neural mobilization on the pain free walking distance (PFWD) and walking time among cases of spinal canal Stenosis presenting with neurogenic claudication.

Methods: Forty eight patients diagnosed with neurogenic claudication were randomly and equally divided into any of the four groups: the “tensioner neural mobilization”; the “one ended slider neural mobilization” group; the “two ended slider neural mobilization” group; and the placebo group. The distance walked before pain onset and this pain-free walking time was recorded immediately before and after the neural mobilization intervention as per group’s protocol.

Result: The “two ended slider method” of neural mobilization was more superior to the “one ended slider” or the “tensioner method” for improving walking capacity. Neither “single ended” slider neural mobilization nor placebo intervention caused any statistically significant improvement in the walking capacity among patients of neurogenic claudication.

Conclusion: The “double slider method” of neural mobilization is most appropriate followed by “slider method” of neural mobilization and the “single ended slider method” for enhancing the walking distance and walking time among patients suffering from neurogenic claudication.
Evaluation of Antimicrobial Agents of Ag–ZnO Core-Shell Prepared by Micro-Jet Plasma Technique
Authors: Al-Rawi Bilal K. , Mazhir Sabah N.
Published: June 2023

Atmospheric pressure Micro-jet plasma technique is used in this study to create Ag–ZnO core/shell nanoparticles. Several different methods, including X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), X-ray dispersive spectroscopy (EDS), transmission electron microscopy (TEM) and ultraviolet-visible spectroscopy (UV–Vis), confirmed the characterization of the synthesized Ag–ZnO core/shell nanoparticles. The pureness of these nanoparticles was validated by XRD analysis, which showed no peaks associated with secondary phases for Ag–ZnO. The synthesis of very pure Ag–ZnO core/shell nanoparticles was also verified by EDX analysis. To understand the high agglomeration rate, the surface morphology was studied by FE-SEM. The Ag–ZnO core/shell nanoparticles were measured to be between 20 and 60[Formula: see text]nm in size by transmission electron microscopy. Ag–ZnO core/shell nanoparticles showed energy band gaps of 3.22[Formula: see text]eV. After that, the antibacterial activity of the prepared nanoparticles was tested against two different types of Gram-positive bacteria [Formula: see text]Staphylococcus. epidermidis and Staphylococcus aureus[Formula: see text] and two different types of Gram-negative bacteria [Formula: see text]Klebsiella. pneumonia and Escherichia coli[Formula: see text] that were isolated from the oral cavity. Additionally, the antifungal activity of the prepared nanoparticles was tested against two different types of yeast [Formula: see text]Candida[Formula: see text]. Antimicrobial activity was shown by the Ag–ZnO nanoparticles produced using the micro-jet plasma method, and the findings suggested that these nanoparticles may be used to eliminate dangerous and harmful bacteria and fungi.
Nonlinear Interaction Between an Elastic Wave and Charge Carriers in a Piezoelectric Semiconductor Rod Aroused by a Dynamic Axial Force at an Endpoint
Authors: Yang Wanli , Hu Yuantai
Published: June 2023

Wave-particle drag effect (WPDE) induced by the interaction between an elastic wave and the carriers in a piezoelectric semiconductor (PS) structure has already become a current hot issue in the field of acoustoelectric conversion. Most related studies are based on the linearized assumption that carrier concentrations are limited to present very small variations such that the nonlinear drift current term can be ignored at all. In this study, the nonlinear effect between an elastic wave and carriers in a PS rod is discussed in detail. The multi-field coupled nonlinear differential equations are numerically solved by finite element method. It is found that the electric transient disturbances are deviated from the standard harmonic distribution by comparing with the linear solutions. The carriers driven by the alternating electric field are more likely to accumulate at the crest when their drift movement motion is consistent with the propagation direction of the traveling wave. Oppositely, the troughs of the carriers tend to depletion due to the nonnegative property of the carriers. In addition, the nonlinear characteristics of the carriers and the dispersion properties of the coupled wave become stronger with the decreasing doping concentrations. These studies will provide guidance for theoretical analysis of wave propagating in PSs and design of acoustoelectric devices.