bluuebunny/crossref_metadata_2025_split huggingface dataset:
Cascaded Raman amplifiers based on fluorotellurite fibers
Authors: Jiao Yadong , Meng Fanchao , Jia Zhixu , Guo Qi , Yu Yongsen , Zheng Chuantao , Ohishi Yasutake , Qin Weiping , Qin Guanshi 
Published: May 2022

In this letter, we demonstrate efficient cascaded Raman amplification in fluorotellurite fibers pumped by a 1550 nm nanosecond laser. All-solid fluorotellurite fibers with a core diameter of ∼ 5 µm are fabricated by using a rod-in-tube method. By using a continuous wave (CW) 1765 nm fiber laser as the signal source for first-order Raman amplification, the amplified 1765 nm laser with an average output power of ∼ 190.9 mW and a pulse width of ∼ 3.42 ns is obtained from a 3 m long fluorotellurite fiber for an average pump power of ∼ 519.35 mW and an input signal power of ∼ 1.05 mW, corresponding to a net gain of ∼ 22.6 dB and an optical-to-optical conversion efficiency of 36.76%. Furthermore, a CW 2049.2 nm fiber laser combined with the above 1765 nm laser are used as the signal sources for second-order cascaded Raman amplification. As the power of the 1765 nm and 2049.2 nm lasers are set as 1.05 and 1.00 mW, respectively, the amplified 2049.2 nm laser with an average output power of ∼ 135.35 mW and a pulse width of ∼ 3.36 ns is obtained from the fluorotellurite fiber for an average pump power of ∼ 558.37 mW, corresponding to a net gain of ∼ 21.3 dB and an optical-to-optical conversion efficiency of 24.24%. As the length of the fluorotellurite fiber is increased to 10 m, third-order cascaded Raman amplification is observed by using a 2442.6 nm signal generated by four-wave mixing and the above 1765/2049.2 nm lasers as the signal sources, causing the generation of the amplified 2442.6 nm laser with an average output power of ∼ 18.84 mW. Our results show that fluorotellurite fibers are promising gain media for constructing cascaded Raman fiber amplifiers with a wide range of wavelengths.
Detection of silent infection of severe acute respiratory syndrome coronavirus 2 by serological tests
Authors: Nishimura Masashi , Sugawa Satoshi , Ota Shinichiro , Suematsu Etsuko , Shinoda Masahiro , Shinkai Masaharu 
Published: May 2022

Background
To control COVID-19 pandemic is of critical importance to the global public health. To capture the prevalence in an accurate and timely manner and to understand the mode of nosocomial infection are essential for its preventive measure.

Methods
We recruited 685 healthcare workers (HCW’s) at Tokyo Shinagawa Hospital prior to the vaccination with COVID-19 vaccine. Sera of the subjects were tested by assays for the titer of IgG against S protein’s receptor binding domain (IgG (RBD)) or IgG against nucleocapsid protein (IgG (N)) of SARS-CoV-2. Together with PCR data, the positive rates by these methods were evaluated.

Results
Overall positive rates among HCW’s by PCR, IgG (RBD), IgG (N) with a cut-off of 1.4 S/C (IgG (N)1.4), and IgG (N) with a cut-off of 0.2 S/C (IgG (N)0.2) were 3.5%, 9.5%, 6.1%, and 27.7%, respectively. Positive rates of HCW’s working in COVID-19 ward were significantly higher than those of HCW’s working in non-COVID-19 ward by all the four methods. Concordances of IgG (RBD), IgG (N)1.4, and IgG (N)0.2 against PCR were 97.1%, 71.4%, and 88.6%, respectively. By subtracting the positive rates of PCR from that of IgG (RBD), the rate of overall silent infection and that of HCW’s in COVID-19 ward were estimated to be 6.0% and 21.1%, respectively.

Conclusions
For the prevention of nosocomial infection of SARS-CoV-2, identification of silent infection is essential. For the detection of ongoing infection, periodical screening with IgG (RBD) in addition to PCR would be an effective measure. For the surveillance of morbidity in the population, on the other hand, IgG (N)0.2 could be the most reliable indicator among the three serological tests.
Knowledge of pre-conception health and planned pregnancy among married women in Jinka town, southern Ethiopia and factors influencing knowledge
Authors: Fikadu Kassahun , Wasihun Biresaw , Yimer Osman 
Published: May 2022

Background
Optimizing women’s health and knowledge of preconception healthcare before conceiving a pregnancy decreases the risk of adverse pregnancy outcomes. However, preconception health care is one of the missing pillars in the continuum of maternal and child health care in Ethiopia. Therefore, this study aimed to assess knowledge of pre-conception health, its relation to planned pregnancy, parity, family planning use, and education among married women in Southern Ethiopia.

Methods
A community-based cross-sectional study was conducted with 337 married women recruited from March 25 to April 30, 2018 in Jinka town. A simple random sampling technique was employed and the data was collected using a structured questionnaire. Data analysis involved calculating frequencies, percentages, and logistic regression. Associations were assessed using odds ratios and 95% confidence intervals with statistical significance determined at a p-value < 0.05.

Results
The overall women’s preconception health care knowledge score in this study was 55.2%, which is a moderate score. In multivariable analyses, women’s secondary level of education [AOR = 2.3; 95% CI = 1.13–4.87], family planning use [AOR = 2.6, 95% CI = 1.37–4.87], planned pregnancy [AOR = 3.2, 95% CI = 1.35–7.44], Nullyparity [AOR = 21.2; 95% CI = 4.92–91.5], and market trade vendors [AOR = 2.5; 95%CI = 1.06–6.03], were significantly associated with knowledge of preconception health care.

Conclusion
The findings show that women’s knowledge of preconception health care is moderate. Women’s knowledge of preconception health care can be linked to their level of education, use of family planning methods, pregnancy planning, and Nullyparity. Therefore, the government and other key stakeholders need to develop a specific education package that improves women’s knowledge of preconception care and pregnancy planning, taking into account factors such as levels of education and literacy when designing implementation strategies.
The invisible costs of obstructive sleep apnea (OSA): Systematic review and cost-of-illness analysis
Authors: Borsoi Ludovica , Armeni Patrizio , Donin Gleb , Costa Francesco , Ferini-Strambi Luigi 
Published: May 2022

Background
Obstructive sleep apnea (OSA) is a risk factor for several diseases and is correlated with other non-medical consequences that increase the disease’s clinical and economic burden. However, OSA’s impact is highly underestimated, also due to substantial diagnosis gaps.

Objective
This study aims at assessing the economic burden of OSA in the adult population in Italy by performing a cost-of-illness analysis with a societal perspective. In particular, we aimed at estimating the magnitude of the burden caused by conditions for which OSA is a proven risk factor.

Methods
A systematic literature review on systematic reviews and meta-analyses, integrated by expert opinion, was performed to identify all clinical and non-clinical conditions significantly influenced by OSA. Using the Population Attributable Fraction methodology, a portion of their prevalence and costs was attributed to OSA. The total economic burden of OSA for the society was estimated by summing the costs of each condition influenced by the disease, the costs due to OSA’s diagnosis and treatment and the economic value of quality of life lost due to OSA’s undertreatment.

Results
Twenty-six clinical (e.g., diabetes) and non-clinical (e.g., car accidents) conditions were found to be significantly influenced by OSA, contributing to an economic burden ranging from €10.7 to €32.0 billion/year in Italy. The cost of impaired quality of life due to OSA undertreatment is between €2.8 and €9.0 billion/year. These costs are substantially higher than those currently borne to diagnose and treat OSA (€234 million/year).

Conclusions
This study demonstrates that the economic burden due to OSA is substantial, also due to low diagnosis and treatment rates. Providing reliable estimates of the economic impact of OSA at a societal level may increase awareness of the disease burden and help to guide evidence-based policies and prioritisation for healthcare, ultimately ensuring appropriate diagnostic and therapeutic pathways for patients.
Mental health among healthcare workers during COVID-19 pandemic in Thailand
Authors: Chinvararak Chotiman , Kerdcharoen Nitchawan , Pruttithavorn Wisarat , Polruamngern Nongnuch , Asawaroekwisoot Thanin , Munsukpol Wanida , Kirdchok Pantri 
Published: May 2022

Objectives
This study aimed to measure the prevalence of burnout syndrome, anxiety, depression, and post-traumatic disorders (PTSD), as well as examine their associated factors among Thai healthcare workers (HCWs) during COVID-19 outbreak.

Method
We employed a multiple-method design at a tertiary-care hospital in Bangkok between May 22, 2021 and June 30, 2021 by using an online survey. The information included demographic characteristics, work details, perceived support, PTSD symptoms, Maslach Burnout Inventory: General Survey (MBI-GS), General Anxiety Disorder-7 (GAD-7), Patient Health Questionnaire (PHQ-2 and PHQ-9), and narrative response to an open-ended question. The associated factors of mental health problems were analysed by multiple logistic regression analyses. The qualitative data were analysed by the content analysis method.

Results
A total of 986 HCWs (89.1% female; mean age = 34.89 ± 11.05 years) responded to the survey. 16.3%,16%, and 53.5% of respondents had a high level of emotional exhaustion, depersonalisation, and diminished personal achievement, respectively. 33.1%, 13.8%, and 2.3% of respondents had anxiety, depression, and PTSD. Risk factors of emotional exhaustion were male sex (ORadj = 2.29), nurses (ORadj = 3.04), doctors (ORadj = 4.29), working at COVID-19 inpatient unit (ORadj = 2.97), and working at COVID-19 intensive care unit (ORadj = 3.00). Additionally, preexisting mental illness was associated with anxiety (ORadj = 2.89), depression (ORadj = 3.47), and PTSD (ORadj = 4.06). From qualitative analysis, participants reported that these factors would improve their mental health: supportive and respectful colleagues, appropriate financial compensation, reduced workload, clarity of policy and communication channel, and adequate personal protective equipment.

Conclusions
Thai HCWs experienced negative mental health outcomes during the COVID-19 pandemic substantially. This issue needs attention and actions should be implemented to support them.
Title- Analysis of the Impact of the Human Resource Service Quality of ARAMAX on the Customer Satisfaction and Loyalty in GCC
Authors: SOLANKI KALPANA 
Published: May 2022

The purpose of this research is to study the human resource service quality of Aramex, and to show how the service quality and responsiveness affects customer satisfaction, loyalty, and success in the delivery industry and to see if Aramex meets the expectations of their customers.
The delivery industry has changed dramatically over the years. The success of the businesses depends on quality, reliability, service, and price. Companies compete by offering different services that effect customer satisfaction. The technology development also played an important role in international parcel delivery, and improvements to services in the industry. With the development of online shopping, courier industry is in great demand. Individuals and companies sell online and market themselves worldwide.
Aramex became a global brand that is known for its advanced products and services. Aramex accessible location between the East and West allows it to reach anywhere it the world delivering customized logistics regionally and globally. Aramex take innovation in technology into consideration as one of the critical elements. The covid 19 pandemic has immensely increased the business of Aramex in 2020-21
How Equilibrium Exchange Rate Misalignments Influence on Economic Growth? Evidence for European Countries
Authors: Ramos-Herrera María del Carmen 
Published: May 2022

AbstractThe determination of the equilibrium real exchange rate is one of the most important issues in open economy since the policymakers are concerned about predicting and monitoring misalignments and they are usually associated with current account problems and currency crises. To the best of my knowledge, this is the first time a study provides empirical evidence on the impact of deviations from the long-run sustainable real exchange rate equilibrium on real economic growth rate applying panel ARDL model (pooled mean group, mean group and dynamic fixed effect estimators) for the 27 European countries during the 2000–2016 period. This study applies the EQCHANGE database developed by Couharde et al. (2017) to obtain the real effective exchange rate (REER) misalignments according to the behavioral equilibrium exchange rate approach for each country. One of the main objectives is to determine the relationship between REER misalignments and economic growth trying to differentiate between short- and long-run effects. To this purpose, a neoclassical growth model is considered controlling for several economic variables such as gross capital formation, degree of openness, human capital, inflation rate, and population rate.
Prediction model of interfacial heat transfer coefficient changing with time and ingot diameter
Authors: Li Yihong , Zhao Yukun , Chen Huiqin 
Published: May 2022

Abstract
We established and simulated finite element solidification models of ingots with 180, 380, 800, 1,300, and 1,880 mm diameters, and the solidification process temperature distributions for the five ingot sizes were assessed by Fluent. On this basis, we established a mathematical model for the interfacial heat transfer coefficient between the ingot and the ingot mold, as well as the ingot diameter and solidification time, using the regression analysis method. The results showed that the change law for the interfacial heat transfer coefficients of the ingots with different sizes and times conformed to the change law of the exponential function, and the interfacial heat transfer coefficient and the ingot diameter had a linear relationship. The interfacial heat transfer coefficient, based on a measured temperature of about 36 tons of ingot with an average diameter of 1,500 mm and about 8.5 tons of ingot with an average diameter of 820 mm, was compared to the interfacial heat transfer coefficient calculated by the model. We found that the variation law of the two was essentially the same, indicating that this model could correctly reflect the interfacial heat transfer coefficient between the ingot and the ingot mold in the literature.
Challenges and prospects of plasmonic metasurfaces for photothermal catalysis
Authors: Mascaretti Luca , Schirato Andrea , Fornasiero Paolo , Boltasseva Alexandra , Shalaev Vladimir M. , Alabastri Alessandro , Naldoni Alberto 
Published: May 2022

AbstractSolar-thermal technologies for converting chemicals using thermochemistry require extreme light concentration. Exploiting plasmonic nanostructures can dramatically increase the reaction rates by providing more efficient solar-to-heat conversion by broadband light absorption. Moreover, hot-carrier and local field enhancement effects can alter the reaction pathways. Such discoveries have boosted the field of photothermal catalysis, which aims at driving industrially-relevant chemical reactions using solar illumination rather than conventional heat sources. Nevertheless, only large arrays of plasmonic nano-units on a substrate, i.e., plasmonic metasurfaces, allow a quasi-unitary and broadband solar light absorption within a limited thickness (hundreds of nanometers) for practical applications. Through moderate light concentration (∼10 Suns), metasurfaces reach the same temperatures as conventional thermochemical reactors, or plasmonic nanoparticle bed reactors reach under ∼100 Suns. Plasmonic metasurfaces, however, have been mostly neglected so far for applications in the field of photothermal catalysis. In this Perspective, we discuss the potentialities of plasmonic metasurfaces in this emerging area of research. We present numerical simulations and experimental case studies illustrating how broadband absorption can be achieved within a limited thickness of these nanostructured materials. The approach highlights the synergy among different enhancement effects related to the ordered array of plasmonic units and the efficient heat transfer promoting faster dynamics than thicker structures (such as powdered catalysts). We foresee that plasmonic metasurfaces can play an important role in developing modular-like structures for the conversion of chemical feedstock into fuels without requiring extreme light concentrations. Customized metasurface-based systems could lead to small-scale and low-cost decentralized reactors instead of large-scale, infrastructure-intensive power plants.
Investigation of anti-cholinesterase and anti-amyloidogenic activities of β-lactam antibiotics
Authors: Özer Eda Özturan , Mirza Hasan Cenk , Tan Oya Ünsal , Türkoğlu Suna 
Published: May 2022

Abstract

Objectives
Neuroinflammation is an important factor in the pathogenesis of neurodegenerative disesases. The following study aimed to clarify the effects of β-lactam antibiotics to the cholinergic system, on acetylcholinesterase (AChE), butyrylcholinesterase (BuChE) activities, considering the structural differences of antibiotics, to evaluate the underlying mechanism of effects provided by protein-antibiotic interactions, and to clarify possible effects of the antibiotics on the aggregation of Aβ-peptides.

Methods
The inhibition/activation mechanisms for each antibiotic were examined kinetically by Ellman method. Destabilization effects of them on amyloid peptide fibrillation were examined and protein-ligand interactions were evaluated with most potent antibiotics by molecular docking studies.

Results
The most powerful inhibitions were detected by the inhibition studies of AChE with ceftazidime (CAZ) and BuChE with amoxicillin (AMX). CAZ was exhibited dose-related dual effect on AChE activity. CAZ was actually the dose-related modifier of AChE. At higher concentrations, CAZ was a nonessential activator of AChE. Molecular docking studies have been confirmed by kinetic studies. Interested β-lactam antibiotics did not prevent fibrillation rate as rifampicin.

Conclusions
Inhibition/activation behaviours of studied β-lactam antibiotics on both cholinesterases may suggest that cholinergic transmission is one of the crucially important components of the β-lactam antibiotics-induced central nervous system adverse reactions.
Etnodizajn and Folkstar Souvenirs: Polish Experiences in Uses of “Folk Art” in the 21st Century
Authors: Klekot Ewa 
Published: May 2022

AbstractThe present paper offers a critical reflection on folk inspirations in Polish design in the early 21st century. It discusses the question of folk as an artistic form, pointing to conceptualizations of folk style and its formal qualities within the field of modern artistic production to which design and craft practices belong. It also touches on the role of the rural actors involved in the processes of the construction of folklore and their attitude towards folk conceived as esthetics, artistic form, and style. For rural producers, folk style was a question of conscious choice, sometimes motivated by conformism and sometimes by a deliberate effort to contribute to local/class/national self-presentation, very often in contradiction to the individual's own taste and that of their peers. The paper then examines the involvement of Polish folk-inspired design (etnodizajn) in the early 21st century with national self-presentation, as well as the various folk (lore)-inspired design strategies followed by contemporary Polish designers. It concludes with the observation that 21st-century design practices drawing on folkloric inspiration are part of a long sequence of cultural appropriations, where appropriation can mean both the alienating inequality experienced by the rural manufacturers of folk, as well as a necessary condition for the understanding of alterity by both sides in the cultural exchange.
Clinical characteristics of postmenopausal women with endometrial polyps
Authors: Kobaidze E. G. , Matveeva Y. N. , Shirinkina E. V. , Statnykh N. V. , Pirozhnikova N. M. 
Published: May 2022

Introduction. The issues of rise in incidence and malignant transformation of endometrial pathology along with elevating proportion of postmenopausal women in global population remain relevant.Aim: to evaluate clinical and laboratory data of postmenopausal patients with endometrial polyp.Materials and Methods. There were enrolled 156 cases of morphologically verified endometrial polyp; the age of the study patients averaged 61.39 ± 7.78 years. Clinical and laboratory data of the obstetric and gynecological history were analyzed; the somatic history was assessed (cardiovascular diseases, arterial hypertension, coronary heart disease). Analysis of laboratory data was performed: complete blood count (CBC), general urinalysis, biochemical parameters – level of cholesterol (Cholesterol), low-density lipoprotein-cholesterol (LDL-C) and high-density lipoprotein cholesterol (HDL-C), triglycerides (TG), glucose, alanine aminotransferase (ALAT), asparagine aminotransferase (ASAT), tumor marker CA-125. Statistical processing of the results was carried out.Results. Endometrial polyps were found by 17% more frequently in patients with late postmenopausal age, which were more (95.5%) prevalent in subjects without history of impaired fertility. Moreover, they also had a high rate (84.6%) of medical abortions and use of intrauterine contraceptives (every second patient). In the vast majority of cases (1/3), the patients had a history of inflammatory diseases of the uterus and uterine appendages, whereas before surgery they had in 37.2% vaginal inflammation requiring sanitation. According to the clinical course, the endometrial polyp manifested equally in early and late post-menopause, with a predominance of spotting (27.5%) and complaints of pain (24.4%). A high frequency of relapses after polypectomy was revealed so that every third patient had already undergone relevant surgery. A high incidence of arterial hypertension (71.6%), fat metabolism disorders (82.1%) were revealed in both early and late postmenopausal patients, while fat metabolism disorders were associated with the symptomatic course of endometrial polyps.Conclusion. The study results showed a statistically significant relationship between the endometrial polyp formation in postmenopausal patients and detected inflammatory pathology of the pelvic organs, diseases of the cardiovascular system and fat metabolism disorders. Further studies are necessary to verify importance of the identified factors as clinical prognostic factors.