bluuebunny/crossref_metadata_2025_split huggingface dataset:
Investigation of Process Parameters in High-Speed Die-less Water Jet Spin-Forming of Copper Sheets
Authors: Asadi Mehrdad , Loh-Mousavi Mohsen , Heidari Ali , Amini Kamran 
Published: September 2021

Abstract
A new forming method called high speed water jet spin-forming was developed. This new forming method is a combination of water jet incremental forming and sheet metal spinning without any mandrel. The forming speed has been significantly increased by spinning of the sheet using a lathe machine. The effects of the forming parameters such as water jet pressure, rotation speed and relative water jet diameter on formability and surface quality of deformed copper parts were investigated. The experimental results indicate that the water jet pressure and the sheet rotation speed have a significant effect on the final depth, wall angle, and surface smoothness. It was also concluded that the final depth exponentially increases as the sheet rotational speed reduced. In addition, when the water jet pressure is low, sheet rational speed does not play a significant role in the final depth of the specimen. Furthermore, it has been determined from the results that high water jet pressure plays an important role in improving the surface quality and wrinkling at different rotational speeds, and as the pressure is increased, the wrinkling decreases and thus the surface quality is improved.
Precursory atmospheric circulations with Rossby wave trains leading to Eurasian extreme cold events
Authors: zhuo Wenqin , Huang Fei , Ding Ruichang , Luo Jin 
Published: September 2021

Abstract
This work examines precursory atmospheric circulations with various wave trains contributing to extreme cooling over central Eurasia in boreal winter from 1979-2016 based on the ERA-Interim dataset. The empirical orthogonal function (EOF) method is used to classify the anomalous sea level pressure field averaged in two weeks prior to extreme cooling. Based on the classification, three types of precursory atmospheric circulation patterns are named according to the origins of wave trains, and their formation mechanisms are revealed as well . Type1: Baffin Bay-origin pattern, which forms in the downstream development of Rossby wave packets generated from the downward stratospheric energy transmission over the Baffin Bay. Type2: Pacific-origin pattern, similar to a Eurasian (EU) teleconnection pattern, arises at the exit area of the westerly jet in the central North Pacific where cyclonic shear exists; then it develops along the northerly westerly jet over the North Atlantic, which may act as a waveguide to the Eurasian continent. Type 3: Atlantic-origin, manifests as the negative phase of type 2, consistent with the Scandinavian (SCAND) pattern, which may results from the air-sea interaction induced by the warm anomaly of sea surface temperature in the middle of North Atlantic. In conclusion, the three types of precursory atmospheric wave train patterns that bring extreme cooling to Eurasia possess diverse disturbing sources and development mechanisms. The results, which are investigated based on a quasi-biweekly time scale , deepen our understanding of the atmospheric genesis of extreme weather and have specific indicative significance to improve the technique of extended forecast.
Hall effect in gated single-wall carbon nanotube film
Authors: Yomogida Yohei , Horiuchi Kanako , Okada Ryotaro , Kawai Hideki , Ichinose Yota , Nishidome Hiroyuki , Ueji Kan , Komatsu Natsumi , Gao Weilu , Kono Junichiro , Yanagi Kazuhiro 
Published: September 2021

Abstract
The presence of hopping carriers and grain boundaries can sometimes lead to anomalous carrier types and density overestimation in Hall-effect measurements. Previous Hall-effect studies on carbon nanotube films reported unreasonably large carrier densities without independent assessments of the carrier types and densities. Here, we have systematically investigated the validity of Hall-effect results for a series of metallic, semiconducting, and metal-semiconductor-mixed single-wall carbon nanotube films. With carrier densities controlled through applied gate voltages, we were able to observe the Hall effect both in the n- and p-type regions, detecting opposite signs in the Hall coefficient. By comparing the obtained carrier types and densities against values derived from simultaneous field-effect-transistor measurements, we found that, while the Hall carrier types were always correct, the Hall carrier densities were overestimated by up to four orders of magnitude. This significant overestimation indicates that thin films of one-dimensional SWCNTs are quite different from conventional hopping transport systems.
Factors That Influence Human Error and Patient Safety in the Pre-hospital Emergency Care Setting: Perspectives of Emergency Care Practitioners in a Middle-income Country
Authors: Rowland Mugsien , Adefuye Anthonio Oladele 
Published: September 2021

Abstract
Background: Delivering pre-hospital emergency care has the potential to be hazardous, and the patient could experience an adverse event. Despite these potential, yet known, threats, little is known about patient safety in the pre-hospital care setting, in contrast to in-hospital care. In South Africa, there are no reports on patient safety and human error issues in the pre-hospital care setting. This study investigated the perspectives of emergency care practitioners (ECPs) in South Africa on the types of errors that occur in the pre-hospital emergency care setting, as well as factors that influence patient safety and precipitate errors during pre-hospital care.Methods: This research was designed as an exploratory study that used a questionnaire administered on 2000 ECPs to obtain their perceptions on factors the influence human error and patient safety in the pre-hospital emergency care environment. Results: Of the 2000 questionnaires distributed, 1,510 were returned, giving a response rate of 76%. Analysis of the respondents’ responses in relation to the types of human errors in the pre-hospital environment yielded five dominant themes, namely errors relating to poor judgement, poor skill/knowledge, fatigue, and communication, and human error. According to the participants, inadequate equipment, environmental factors, personal safety concerns, practitioner’s incompetence, and ineffective teamwork are the top five factors that influence patient safety in the pre-hospital emergency care setting. The majority (65.1%; p < 0.001) of public sector ECPs reported that they had not received training on patient safety, nor do they have a protocol for managing medical error at their workplace (65.7%; p < 0.007). Conclusion: In conclusion, this study investigated paramedics’ views on types of errors that occur in the pre-hospital emergency care setting, and factors that influence patient safety and precipitate errors during pre-hospital care. It was found that public-sector emergency medical service (EMS) in South Africa seldom train their staff on patient safety or have a protocol for managing medical error. The study advocates that, to overcome medical errors, EMS in South Africa should establish a culture of safety that focuses on system improvement and personnel training.
Effect of limb rotation on radiographic alignment measurement in mal-aligned knees
Authors: Sun Xiaoshu , Yang Bin , Xiao Shengzhao , Yan Yichen , Liu Zifan , Yuan Liang , Wang Xiaohua , Sun Bin , Yao Jie , Fan Yubo 
Published: September 2021

Abstract
PurposeLong-leg-radiography (LLR) is commonly used for measurement of lower limb alignment. However, limb rotations during radiography may interfere with the alignment measurement. This study examines the effect of limb rotation on the accuracy of measurements based on the mechanical and anatomical axes of the femur and tibia, with variations in knee flexion and coronal deformity. MethodsForty-five lower limbs of thirty patients were scanned with CT. Virtual LLRs simulating 5 rotational positions (neutral, ±10°, and ±20° internal rotation) were generated from the CT images. Changes in the hip-knee-ankle angle (HKA) and the femorotibial angle (FTA) were measured on each image with respect to neutral values. These changes were related to knee flexion and coronal deformity under both weight- and non-weight-bearing conditions. ResultsThe measurement error of the HKA and FTA derived from limb rotation were up to 4.84±0.66° and 7.35±0.88° respectively, and were correlated with knee flexion (p＜0.001) and severe coronal deformity (p≤0.001). Compared with non-weight-bearing position, coronal deformity measured in weight-bearing condition was 2.62° greater, the correlation coefficients between the coronal deformity and the deviation ranges of HKA and FTA were also greater. ConclusionFlexion and severe coronal deformity have significant influence on the measurement error of lower limb alignment. Errors can be amplified in the weight-bearing condition compared with the non-weight-bearing condition. The error of measurement of the anatomic axis is greater than the mechanical axis. Considering LLR is the gold standard image modality, attention should be paid to the measurement of knee alignment. Especially for the possible errors derives from weight-bearing long leg radiographs of patients with severe knee deformities.
Healthcare Seeking Among Swedish Patients in Opioid Substitution Treatment – a Mixed Methods Study on Barriers and Facilitators
Authors: Troberg Katja , Lundqvist Karin , Hansson Helena , Håkansson Anders , Dahlman Disa 
Published: September 2021

Abstract
Background: Patients in opioid substitution treatment (OST) have poorer health than the general population. Thus, they do not seek somatic health care to the extent that is medically motivated. Barriers hindering patients from seeking medical help through the conventional healthcare system result in a high degree of unmet healthcare needs. Barriers to and facilitators of OST patients’ healthcare seeking have been sparsely examined.Methods: Mixed methods were employed. The quantitative part consisted of a cross-sectional questionnaire covering questions on physical health, healthcare seeking, and barriers thereof, which was collected from 209 patients in OST. A sub-sample of eleven OST patients participated in semi-structured interviews, for the qualitative part of the study, covering experience of healthcare, lifestyle and self-images, expectations and ideals of Swedish healthcare. Results: Confirmed by qualitative data, quantitative data revealed deprioritization, fear of stigma and of being treated badly, and problems in navigation throughout the healthcare system, leading to unsuccessful establishment of contact, being most common reasons for not seeking somatic healthcare. Thus, interviewees provided a deeper knowledge of the barriers stigma, lack of means to prioritize health and difficulties navigating throughout the healthcare system, leading to resignation and deprioritization. On-site primary healthcare seemed to contribute to increased access and utilization of healthcare.Conclusion: Individual and structural barriers decreasing access to healthcare lead to increased inequalities in healthcare utilization, adding to an already deteriorating health of this ageing population. Integration of on-site primary healthcare and OST could provide acceptable and accessible healthcare. Further investigations into this subject need to be conducted.
Overcoming institutionalised barriers to digital health systems: An autoethnographic study of the judicialization of a digital health tool.
Authors: Mureyi Dudzai 
Published: September 2021

Abstract
Background
The deployment of digital health systems may be impeded by barriers that or are linked to underlying enduring institutions. Attempting to challenge the barriers without addressing the underpinning institution may be ineffective. This study reflects on ways actors may surmount institutionalised barriers to the uptake of digital tools in health systems.
Methods
Institutional theory concepts were applied to an autoethnographic case study of efforts to introduce a digital tool to provide citizens with medicines information.
Results
The tool’s uptake was impeded because of state regulators’ institutionalised interpretation of pharmaceutical advertising laws, which rendered the tool illegal. The regulators’ institutionalised interpretation of pharmaceutical advertising laws was successfully challenged through various actions by the author- a pharmacist, and by allies beyond the health sector. These actions included: framing the tool as legal and constitutional, litigation, and redefining these concepts: ‘advertising’, ‘health institution’, and the role of regulatory bodies vis a vis innovation.
Conclusion
After identifying a barrier as being institutionalised or linked to an institution, actors might challenge such barriers by engaging in institutional work; i.e. deliberate efforts to challenge the relevant institution (e.g. a law, norm or shared belief). Institutional work may require the actions of multiple actors within and beyond the health sector, including judicial actors. Such cross-sectoral alliances are efficacious because they provide institutional workers with a broader range of strategies, framings, concepts and forums with which to challenge institutionalised barriers. However, actors beyond the health system (e.g. the judiciary) must be inquisitive about the potential implications of the digital health interventions they champion.
Implementation of an Integrated Health Risk Assessment Coupled with Spatial Interpolation and Source Apportionment: A Case Study of Soil Heavy Metals, China
Authors: Miao Fangfang , Zhang Yimei , Li Yu , Fang Qinglu , Zhou Yinzhuang 
Published: September 2021

Abstract
Soil heavy metal contaminated sites with multiple sources of pollution have caused worldwide public concern. However, the lack of correlation of risk assessment between source identification of heavy metal led to unclear direction of source governance. A methodology was established by combining source apportionment of human health risks with ecological enrichment to characterize source-identified risks of heavy metals based on Ordinary kriging interplotation. Principal component analysis (PCA) and positive matrix factorization (PMF) model were used to identify and classify potential sources of heavy metals synthetically. The integrated results were incorporated into the health risk model to evaluate potential non-carcinogenic and carcinogenic risk of soil heavy metals. A case study was conducted in Suzhou city of China. The results showed that concentrations of Cd and Hg were highly above the background values, accounting for percentages of 239.6% and 415.9% above background values, respectively. The source contributed human health risk index of As contributed 76.9% to non-carcinogenic risk by pollutant sources of agriculture activities. The Non-cancer health risk index for children and adults was 1.08 and 1.00 respectively. The cancer health risk was 3.67E-03 for children and 3.97E-04 for adults. Cr originated from indutriy activities, accounting for 29.5% of total heavy metals, and constituted the largest carcinogenic impact on the population. This study provided a new insight for the treatment of mutil-sources of soil heavy metal pollution and also some reference value for the improvement of the risk assessment system.
The Response of Electronic And Energetic Properties of Two Types of The Sp-hybridised Carbon-Carbon Bonds To An External Uniform Electric Field
Authors: Sadlej-Sosnowska Nina , Ocios-Bębenek Agnieszka , Boczar Dariusz 
Published: September 2021

Abstract
The susceptibility of electronic and energetic properties of two sets of molecules to perturbation in a uniform electric field was investigated. The molecules of one set were (10)cumulenes terminated with two functional groups, R1 and R2; those of the second set were (10)polyyenes substituted with the same R1 and R2 groups. The cumulene and polyyne molecules had similar lengths of the system of conjugated bonds between the two most extreme carbon atoms. Dipole moments and polarizabilities of the molecules were used as determinants of the overall charge transfer between polar groups and their modifications due to the application of an external electric field. The field was directed along the main (longest) axis of the molecules from the negative to the positive pole. Comparison of the polarizability values revealed that they were higher in the (10)cumulenes than in the (10)polyynes. Parabolic dependence of the molecular energy as function of field strength can be interpreted in terms of the response of electron density to an electric field.
Synthesis of Benzenesulfonamide Derivatives Via Ring Opening of Aziridines In The Presence of Magnetically Retrievable Graphene Based (CoFe@rGO) Nanohybrid.
Authors: Sheoran Ankush , Komal  , Kaur Jaspreet , Kaur Paramdeep , Agarwal Jyoti , Singhal Sonal 
Published: September 2021

Abstract
Graphene based magnetic nanohybrids have engrossed considerable research curiosity because of their exceptional properties and diverse applications associated with green chemistry. In this regard, a practical, facile and regioselective preparation of 1,2-diamines from N-tosylaziridine/(S)-(+)-2-Benzyl-1-(p-tolylsulfonyl)aziridine and aryl amines in the presence of magnetically separable graphene based nanohybrid (CoFe@rGO) has been proposed under mild and solvent free conditions. The FT-IR, FE-SEM, XRD and EDX spectroscopic analysis confirmed the formation of the CoFe@rGO nanohybrids. For unsymmetrical aziridine, nucleophilic attack of aryl amines was observed to take place selectively at the more substituted carbon atom of aziridine ring. Environmentally benign, efficient, shorter reaction time, solvent-free conditions, low catalyst loading, excellent reaction yields and reusability of the catalyst for six consecutive runs without significant loss in its activity are the key advantages of this protocol.
Genome‐wide Association Links Candidate Genes to Fruit Firmness, Fruit Flesh Color, Flowering Time, and Soluble Solid Content in Apricot (Prunus Armeniaca L.)
Authors: Ferik Filiz , Ates Duygu , Ercisli Sezai , Erdogan Abdullah , Orhan Emine , Tanyolaç Bahattin 
Published: September 2021

Abstract
Background Apricots originated from China, Central Asia and the Near East and arrived in Anatolia, and particularly in their second homeland of Malatya province in Turkey. Apricots are outstanding summer fruits, with their beautiful attractive color, delicious sweet taste, aroma and high vitamin and mineral content. Methods and results In the current study, a total of 259 apricots genotypes from different geographical origins in Turkey were used. Significant variations were detected in fruit firmness (FF), fruit flesh color (FFC), flowering time (FT), and soluble solid content (SSC). A total of 11,532 SNPs based on DArT were developed and used in the analyses of population structure and association mapping (AM). According to the STRUCTURE (v.2.2) analysis, the apricot genotypes were divided into three groups. The mixed linear model with Q and K matrixes were used to detect the associations between the SNPs and four traits. A total of 131 SNPs were associated with FF, FFC, and SSC. No SNP marker was detected associated with FT. Conclusion The results demonstrated that AM had high potential of revealing the markers associated with economically important traits in apricot. The SNPs identified in the study can be used in future breeding programs for marker-assisted selection in apricot.
Survival Analysis of Age-related Oral Squamous Cell Carcinoma: A Population Study Based on SEER
Authors: Wang Peipei , Guo Kaibo , Zhang Anlai , Li Wendi , Ding Shuning , Sun Leitao , Ruan Shanming 
Published: September 2021

Abstract
This research aimed to investigate the prognostic factors of oral squamous cell carcinoma (OSCC), especially the role of age. A total of 33619 cases of OSCC were received from the Surveillance, Epidemiology, and End Results database during 2005–2015. Kaplan-Meier curves of 5-year overall survival rates and 5-year cancer specific survival rates were performed, and univariate and multivariate Cox regression analysis as well as competing risk model were used to help understand the relationship between various factors and mortality of OSCC. Compared to 18–39 years old group, the older age was an important predictor of worse prognosis. The multivariate analysis of overall survival (OS) were 50–59 years old (HR, 1.32; 95% CI, 1.17–1.48; p ≤ .001), 60–69 years old (HR, 1.66; 95% CI, 1.42–1.87; p ≤ .001) and 70 + years old (HR, 3.21; 95% CI, 2.86–3.62; p ≤ .001) respectively, while the specific value of competing risk model were 60–69 years old (HR, 1.21; 95% CI, 1.07–1.38; p = .002) and 70 + years old (HR, 1.85; 95% CI, 1.63–2.10; p ≤ .001). In addition, female gender, unmarried, Blacks, tumor in floor of mouth, size and higher TNM classification were also other predictors that signify significant clinically deterioration of OS / CSS. Our research revealed that age was an important factor in explaining the difference of survival in the whole process of OSCC. It’s suggested that we should pay attention to the influence of age on diagnosis, treatment and prognosis in the clinical process.
Performance analysis of dual material junction accumulation mode tri gate junctionless SOI FET: Modeling and Simulation
Authors: Goswami Mrinmoy , Chattopadhyay Ankush , Bose Chayanika 
Published: September 2021

Abstract
The paper illustrates the performance of Tri-Gate (TG) Dual Material (DM) SOI (Silicon on Insulator) Junctionless (JL) FET operating in Junction Accumulation Mode (JAM). An analytical model is developed to evaluate its performance. The device is also simulated using Silvaco device simulator. Both the analytical and simulation results are compared and found to match closely. Quasi 3-D modeling approach is adopted here to determine the surface potential of the above device. In this technique, the entire 3-D device is segregated into two 2-D devices with certain physical constraints. These 2-D devices are then analyzed separately to obtain the surface potentials, which are added together using suitable multiplication factors to get the surface potential of the 3-D device. This surface potential is, in turn, used to model the threshold voltage, sub-threshold drain current ( I d,sub ) and the drain induced barrier lowering (DIBL). The proposed device configuration reduces the I OFF significantly and offers excellent immunity to SCEs. The response of the proposed device is studied for the variations of certain device parameters, such as, thickness of High- K dielectric layer in stack gate, channel doping, and the workfunctions as well as lengths of the gate metals. Such study will lead to turn the proposed device immune to short channel effects through proper choice of various parameters.