bluuebunny/crossref_metadata_2025_split huggingface dataset:
Entrepreneurial networks, entrepreneurial orientation, and performance of small and medium enterprises: are dynamic capabilities the missing link?
Authors: Abu-Rumman Ayman , Al Shraah Ata , Al-Madi Faisal , Alfalah Tasneem 
Published: July 2021

AbstractPerformance of small and medium enterprises (SMEs) has been addressed widely in the literature. Both developed and developing countries are highly concerned about the growth and performance of SMEs. The literature exploring performance is abundant, however, has certain controversies. To identify the reasons behind those controversies, this study was conducted with the aim being to identify the mediating role of dynamic capabilities which are developed by entrepreneurial networks and entrepreneurial orientation. The study collected the data from a sample of SMEs based in Jordan which were connected through a closed network and were the part of groups. The data was collected via an electronic questionnaire, and100 SMEs were contacted and invited to participate in the survey on a purposive sampling basis. Structural equation modelling was applied to identify the direct impacts and the mediating impact. The findings identified that amongst the chosen firms, entrepreneurial networking has an insignificant impact; however, entrepreneurial orientation has shown a significant positive impact. Furthermore, the mediating role of dynamic capabilities was significant in both the relationships. The findings suggested that the sector should develop strong networks and should consider strategic alliances to gain competitive edge. Future researchers are guided to implement the same framework along with the dimensions of the variable.
Characteristics of rifampicin-resistant tuberculosis detection in China, 2015–2019
Authors: Su Wei , Ruan Yun-zhou , Li Tao , Du Xin , Jiang Jia-wen , Li Ren-zhong 
Published: July 2021

Abstract
Background
The very high burden of rifampicin resistance tuberculosis (RR-TB) and the very low detection of RR-TB cases are a major challenge that China has been facing. This study analyzed the characteristics of RR-TB detection in China after the change of RR-TB detection strategy since 2015, aiming to provide reference and evidence for the development of more precise national drug resistance tuberculosis prevention and control policy.

Methods
We extracted data related to rifampicin resistance screening from the national Tuberculosis Information Management System (TBIMS) from 2015 to 2019, and used descriptive research methods to analyze the screening rate of presumptive RR-TB, the number and duration of RR-TB patients detected and drug resistance testing methods in each year. Chi-square test was used to compare the differences in component ratio or rate between years, and Kruskal Wallis test was used to compare the differences in median days for detection of RR-TB patients in each year.

Results
A total of 68,200 RR-TB cases were detected during 2015–2019, of which 48.1% were new cases. The number and detection rate of RR-TB cases increased year by year, from 10 019 and 14.3% in 2015 to 18 623 and 28.7% in 2019, respectively. Of the bacteriologically confirmed TB cases, 81.9% were tested for RR in 2019, a considerable increase from 29.5% in 2015. In 2019, only 41.0% of RR-TB cases had fluoroquinolones (FQs) susceptibility testing performed, and this proportion has been declining year by year since 2016. The proportion of application of rapid molecular tools increased from 24.0% in 2015 to 67.1% in 2019, and the median days to obtain RR results was significantly shortened. In 2019, 76.0% of RR-TB cases were diagnosed as presumptive RR-TB in county-level hospitals.

Conclusions
After China modified the RR-TB detection strategy, the screening rate of RR and the number of RR-TB cases increased significantly. The RR testing methods now predominantly utilize rapid molecular tools. However, comprehensive measures should be implemented to close the gap in the detection of RR-TB cases. It is imperative to take FQs susceptibility testing seriously and effectively strengthen the laboratory capacity of county-level hospitals.

Graphical Abstract
IL-17F depletion accelerates chitosan conduit guided peripheral nerve regeneration
Authors: Chen Feixiang , Liu Weihuang , Zhang Qiang , Wu Ping , Xiao Ao , Zhao Yanan , Zhou Ying , Wang Qiaona , Chen Yun , Tong Zan 
Published: July 2021

AbstractPeripheral nerve injury is a serious health problem and repairing long nerve deficits remains a clinical challenge nowadays. Nerve guidance conduit (NGC) serves as the most promising alternative therapy strategy to autografts but its repairing efficiency needs improvement. In this study, we investigated whether modulating the immune microenvironment by Interleukin-17F (IL-17F) could promote NGC mediated peripheral nerve repair. Chitosan conduits were used to bridge sciatic nerve defect in IL-17F knockout mice and wild-type mice with autografts as controls. Our data revealed that IL-17F knockout mice had improved functional recovery and axonal regeneration of sciatic nerve bridged by chitosan conduits comparing to the wild-type mice. Notably, IL-17F knockout mice had enhanced anti-inflammatory macrophages in the NGC repairing microenvironment. In vitro data revealed that IL-17F knockout peritoneal and bone marrow derived macrophages had increased anti-inflammatory markers after treatment with the extracts from chitosan conduits, while higher pro-inflammatory markers were detected in the Raw264.7 macrophage cell line, wild-type peritoneal and bone marrow derived macrophages after the same treatment. The biased anti-inflammatory phenotype of macrophages by IL-17F knockout probably contributed to the improved chitosan conduit guided sciatic nerve regeneration. Additionally, IL-17F could enhance pro-inflammatory factors production in Raw264.7 cells and wild-type peritoneal macrophages. Altogether, IL-17F may partially mediate chitosan conduit induced pro-inflammatory polarization of macrophages during nerve repair. These results not only revealed a role of IL-17F in macrophage function, but also provided a unique and promising target, IL-17F, to modulate the microenvironment and enhance the peripheral nerve regeneration.
Minimum acceptable diet practice and its associated factors among children aged 6–23 months in rural communities of Goncha district, north West Ethiopia
Authors: Birie Bamlaku , Kassa Andargachew , Kebede Emnet , Terefe Bezabih 
Published: July 2021

Abstract
Background
After the first 6 months breast milk is no longer sufficient to meet the nutritional needs of the infant. Therefore, complementary foods should be added to the child’s diet. Feeding children with a diversified diet is practiced improperly in developing countries including Ethiopia particularly in the rural community of the Amhara region. However, limited information was documented on the rural communities and no data were available specifically in the study area to show the exact picture of child feeding practices. So, this study was planned to assess minimum acceptable diet practice and its associated factors among children aged 6–23 months in the rural community of Goncha district, Amhara region, Ethiopia.

Methods
Community-based cross-sectional study was employed to determine minimum acceptable diet practice and its associated factors among children aged 6–23 months at rural communities of Goncha district, East Gojjam zone, Amhara region, Ethiopia. A multi-stage sampling technique was used to select study subjects, and an interview administered structured questionnaire was used to collect the data. Data were entered by Epi Data version 4.0.2 and exported to SPSS 20 for analysis. Bivariate and multivariable logistic regression analysis was used to see the association. Then, P-value < 0.05 with 95% CI on multivariable logistic regression analysis were used to identify the predictor of the outcome variable.

Results
A total of 430 mothers who have children aged 6–23 months were included in the analysis with a 98% of response rate. About 12.6% of children aged 6–23 months received the recommended minimum acceptable diet. Children whose mothers who had formal education [AOR = 2.7, 95%CI (1.133, 6.231)], institutional delivery [AOR = 4.5, 95%CI (1.986, 10.362)], media exposure [AOR = 2.6, 95%CI (1.303, 5.291)] and higher household wealth index [AOR = 2.5, 95%CI (1.139, 5.90)] were significantly associated with minimum acceptable diet.

Conclusion
The practice of minimum acceptable diet in the study area was inadequate and very low according to the national recommendation. So, strengthening institutional delivery, improving the wealth of the community and exposure to media, and finally empowering women’s’ for education is recommended.
Cor triatriatum with supramitral ring: “cor tetratriatum”, associated with Raghib syndrome with Eisenmenger syndrome: multimodality imaging approach in this exceedingly rare case report
Authors: Kumar Barun , Kodliwadmath Ashwin , Upadhyay Amar Nath , Singh Anupam , Darbari Anshuman , Nanda N. 
Published: July 2021

Abstract
Background
Cor triatriatum and supramitral ring are congenital anomalies which result in formation of three chambers of atria. To the best of our knowledge, simultaneous presence of both entities in the same patient resulting in the formation of four chambers of atria has not been described in the literature. Here, we report a case of simultaneous presence of cor triatriatum and supramitral ring associated with Raghib syndrome and Eisenmenger syndrome.

Case presentation
We report the case of a middle-aged gentleman, who presented to us with features of atrial septal defect with Eisenmenger syndrome. Multimodality imaging confirmed the simultaneous presence of supramital ring and cor triatriatum resulting in “cor tetratriatum” along with Raghib syndrome. Presence of Eisenmenger syndrome compelled us to offer medical therapy for the patient.

Conclusion
This is the first case report describing the simultaneous presence of supramitral ring and cor triatriatum resulting in a new entity—“cor tetratriatum”.
Distributed acoustic sensing/surface orbital vibrator: Rotary seismic sources with fiber-optic sensing facilitates autonomous permanent reservoir monitoring
Authors: Correa Julia , Isaenkov Roman , Yavuz Sinem , Yurikov Alexey , Tertyshnikov Konstantin , Wood Todd , Freifeld Barry M. , Pevzner Roman 
Published: July 2021

With new developments of fiber-optic sensing and rotary sources, continuous active seismic monitoring for onshore applications has now the opportunity to be fully realized and applied to enhance subsurface resource extraction and use. To date, conventional seismic monitoring deployments have primarily consisted of receiver arrays, either fixed or not, with periodic data acquisition campaigns using temporarily deployed sources, resulting in time-lapse data with poor temporal resolution. Only a few niche efforts have demonstrated continuous acquisition using fixed source-receiver networks. We have evaluated the initial results of a network of fixed rotary seismic sources, referred to as surface orbital vibrators (SOVs), coupled with a permanent distributed acoustic sensing (DAS) network at the CO2CRC Otway Field Site. Although rotary seismic sources are not new, our development of the SOV focused on simplifying the cost and complexity of the source hardware while delivering broad frequency spectrum of the source signal. The upgraded hardware is aligned with a robust methodology for autonomous operation and data processing. At the Otway Site, we deployed SOVs at nine locations, monitoring seismic response in seven DAS instrumented wells. Baseline operation of the DAS/SOV sensor array and source system demonstrates its capability with near offsets attaining a signal-to-noise ratio approaching 100 dB with a normalized root mean square of 10%. Furthermore, analyses of traveltime repeatability indicate that the DAS/SOV system can deliver time resolution of ±500 μs.
The No Surprises Act: A Bipartisan Achievement to Protect Consumers from Unexpected Medical Bills
Authors: Hoadley Jack , Lucia Kevin 
Published: July 2021

Abstract
The No Surprises Act, passed by Congress at the end of 2020, offers significant protections to most Americans with private health insurance. Insured Americans are vulnerable to receiving surprise medical bills when they receive services from out-of-network providers. Protections for consumers against such bills initially emerged in several states that passed laws. The varying approaches taken in different state laws ultimately offered a foundation for federal legislation. Although there was always a broad consensus among stakeholders for protecting consumers during both state and federal deliberations, it was a challenge to identify a means of determining the amount that an insurer should pay to the out-of-network provider. But Congress eventually reached a compromise that became law, and that law goes into effect in January 2022.
Adopting in the Shadows: False Registration as a Method of Adoption in Postcolonial South Korea
Authors: Lim Sungyun 
Published: July 2021

AbstractThis article examines false registration as a method of domestic adoption in South Korea. The article argues that the practice of falsely registering adoptees as natural births in the family registry emerged in response to the highly restrictive adoption laws in South Korea. As adopting agnatic kin for the purpose of family succession was deemed the only legitimate form of adoption, significant hurdles existed for other kinds of adoption in Korea. This article examines the history of domestic adoption in Korea and highlights the legal hurdles to domestic adoption. These restrictive adoption customs first originated during the Chosŏn dynasty (1392–1910) as a prescription for yangban elite; they were then codified as customary law for all Koreans under Japanese colonial rule (1910–45). The ban on non-agnatic adoption continued in the postcolonial period when it was codified in the new Civil Code of 1960. Multiple legal reforms were attempted since the 1970s to promote domestic adoptions, but change was slow. This article argues that the highly restrictive nature of adoption laws in South Korea produced an adoption regime that existed largely outside of the legal realm.
Polyketone-Based Molecular Ropes as Versatile Components for Functional Materials
Authors: Inokuma Yasuhide , Inaba Yuya 
Published: July 2021

Abstract
This account describes recent aspects of the polyketone-based synthesis of functional molecules. Polyketones are rope-like compounds that combine conformational flexibility with reaction diversity. Although natural-type polyketones, bearing a repeating 1,3-diketone sequence, are difficult to handle as synthetic components owing to complex tautomerism and rapid intramolecular cyclization, the recent development of 1,3- and 1,4-diketone hybrid sequences has enabled access to stable, discrete polyketones for further synthetic functionalization. Various molecular structures with functional properties can be generated from the polyketone chains through rope manipulations, such as bending and coiling. Herein, we introduce their synthesis and structures, focusing on the functionality derived from π-conjugation and metal ion coordination with polyketone derivatives, such as solid-state photo emission, metal-ion conduction, and adsorption.
Impact of Follicular Menstrual Phase on Body Composition Measures and Resting Metabolism
Authors: GOULD LACEY M. , CABRE HANNAH E. , BREWER GABRIELLE J. , HIRSCH KATIE R. , BLUE MALIA N. M. , SMITH-RYAN ABBIE E. 
Published: July 2021

ABSTRACT

Purpose
This study aimed to identify the effects of early follicular (EF) and midfollicular (MF) menstrual phases on body composition, resting metabolic rate (RMR), and respiratory quotient (RQ) assessment accuracy to identify an optimal testing period.

Methods
Body composition was obtained from a four-compartment (4C) criterion model (fat mass (FM), fat-free mass, body fat percent, and dual-energy x-ray absorptiometry (DXA; FM, lean mass (LM), trunk FM, and trunk LM) in 19 eumenorrheic females (mean ± SD: age, 21.3 ± 3.1 yr, body mass index, 23.6 ± 1.8 kg·m−2). RMR (kcal·d−1) and RQ (a.u.) were measured via indirect calorimetry for 25 min. Body composition, RMR, and RQ were measured during the EF and MF phases. Dependent-samples t-tests were used to compare outcomes between EF and MF.

Results
4C outcomes were similar between phases (P > 0.05). During EF, the following 4C components were significantly greater (P < 0.05): body volume (mean difference (MD) ± SD, 0.70 ± 1.05 L), extracellular fluid (MD ± SD, 0.27 ± 0.51 L), and body mass (MD ± SD, 0.56 ± 0.80 kg). DXA-measured LM, body fat percent, trunk LM, and trunk FM were similar (P > 0.05); however, DXA FM was significantly greater during EF (MD ± SD, 0.29 ± 0.40 kg; P = 0.005), yet within measurement error of the device. Although RMR was not significantly different between phases (MD ± SD, 6.0 ± 190.93 kcal·d−1; P > 0.05), RQ was significantly higher during EF (mean ± SD, 0.03 ± 0.06 a.u.; P = 0.029) compared with MF.

Conclusions
Body composition from 4C and DXA do not seem to be affected beyond measurement error as a result of compartmental changes from the menstrual cycle. During MF, women oxidized more fat as demonstrated by a lower RQ. Researchers should aim to be more inclusive and schedule testing for females within 11–12 d from the onset of menstruation.
Who’s got the power? Expressions of empowerment among in-school adolescents enrolled in the Girls Achieve Power (GAP Year) trial in three peri-urban settings of South Africa
Authors: Kutywayo Alison , Frade Sasha , Gordon Kerry , Mahuma Tshepo , Naidoo Nicolette P. , Mullick Saiqa 
Published: July 2021

Background: Empowerment is when a person gains mastery of their life and environment. This paper describes three central elements of empowerment (agency, resources, and institutional structures) expressed by adolescents, discussing implications for strengthening adolescent sexual reproductive health, HIV, and violence prevention programming. Methods: A cross-sectional survey was conducted (April 2017 – May 2018) as part of the GAP Year trial among grade eight learners (12 – 18 years) from 26 lowest quintile public high schools in Khayelitsha, Soweto and Thembisa townships, South Africa. Data were on empowerment experiences using a knowledge, attitudes, and practices survey. Descriptive and chi-square test statistics were employed, assessing the association between sociodemographic and domains of empowerment. Results: A total of 2383 adolescents in 26 schools completed the baseline survey: 63.1% female, mean age 13.7 years, 96.9% Black African. Agency: Males (4.04 vs 3.94, p=0.008) and those 15 – 18 years (4.10 vs 3.95, p=0.027) expressed stronger decision-making capacity. Females (3.18 vs 2.92, p<0.001) indicated a greater sense of collective action. Females (0.77 vs 0.72, p=0.008), those aged 12 -14 years (0.76 vs 0.71, p=0.027) and those with at least one parent/guardian employed (p=0.014) had stronger leadership confidence. Resources: Those 12-14 years expressed higher self-esteem (2.18 vs 2.08, p=0.017). Males (2.24 vs 1.87, p<0.001) and those who had at least one parent/guardian employed (p=0.047) had a higher perception of freedom from gender-based violence. Males showed greater mobility (2.89 vs 2.66, p=<0.001). Institutional structures: Coloured participants showed more positive norms than their Black counterparts (5.38 vs 2.12, p=0.005). Conclusions: Males expressed greater empowerment around decision-making, gender-based violence and mobility; females expressed greater collective action and leadership. Working across the ecological model, interventions addressing sex differences, targeting adolescents of all ages, and parental unemployment may strengthen expressions of empowerment, especially adolescents’ safety, mobility, aspirations, and future hopes.
LED nonlinearity mitigation in LACO-OFDM optical communications based on adaptive predistortion and postdistortion techniques
Authors: Abd Elkarim Mohammed , Aly Moustafa H. , AbdelKader Hala M. , Elsherbini M. M. 
Published: July 2021

The preinstalled white light emitting diodes (WLEDs) inside buildings can be exploited as an optical source in visible light communications (VLC) motivated by high optical efficiency and low cost. One of the main challenges for VLC is LED nonlinear distortion, which has a detrimental effect on system performance. Estimation and compensation of the LED nonlinear behavior can be accomplished using predistortion or postdistortion techniques. Three compensation techniques are adopted to mitigate the effect of LED nonlinearity on layered asymmetrically clipped optical, orthogonal frequency division multiplexing. Their performance and efficiency are discussed and compared with the aid of error vector magnitude and bit error rate (BER) in an additive white Gaussian noise channel. The obtained results reveal that polynomial-based predistorters and postdistorters can overcome the LED nonlinear behavior with extra SNR of only 0.25 dB at BER of

1

0

−
3

. Furthermore, the look-up-table-based predistorter can provide the same BER with lower SNR penalty than the previous two systems.
Fiber-based biphoton source with ultrabroad frequency tunability
Authors: Lopez-Huidobro Santiago , Lippl Markus , Joly Nicolas Y. , Chekhova Maria V. 
Published: July 2021

Tunable biphotons are highly important for a wide range of quantum applications. For some applications, especially interesting are cases where two photons of a pair are far apart in frequency. Here, we report a tunable biphoton source based on a xenon-filled hollow-core photonic crystal fiber. Tunability is achieved by adjusting the pressure of the gas inside the fiber. This allows us to tailor the dispersion landscape of the fiber, overcoming the principal limitations of solid-core fiber-based biphoton sources. We report a maximum tunability of 120 THz for a pressure range of 4 bar with a continuous shift of 30 THz/bar. At 21 bar, the photons of a pair are separated by more than one octave. Despite the large separation, both photons have large bandwidths. At 17 bar, they form a very broad (110 THz) band around the frequency of the pump.
Scalable higher-order exceptional surface with passive resonators
Authors: Yang Hong , Mao Xuan , Qin Guo-Qing , Wang Min , Zhang Hao , Ruan Dong , Long Gui-Lu 
Published: July 2021

The sensitivity of perturbation sensing can be effectively enhanced with higher-order exceptional points due to the nonlinear response to frequency splitting. However, experimental implementation is challenging since all the parameters need to be precisely prepared. The emergence of an exceptional surface (ES) improves the robustness of the system to the external environment, while maintaining the same sensitivity. Here, we propose, to our knowledge, the first scalable protocol for realizing a photonic high-order ES with passive resonators. By adding one or more additional passive resonators in the low-order ES photonic system, the three- or arbitrary N-order ES is constructed and proved to be easily realized in experiment. We show that the sensitivity is enhanced and the experimental demonstration is more resilient against fabrication errors. The additional phase-modulation effect is also investigated.