bluuebunny/crossref_metadata_2025_split huggingface dataset:
Time accurate solution to Benjamin–Bona–Mahony–Burgers equation via Taylor–Boubaker series scheme
Authors: Izadi Mohammad , Samei Mohammad Esmael 
Published: April 2022

AbstractThe object of this paper is to develop an accurate combined spectral collocation approach to numerically solve the generalized nonlinear Benjamin–Bona–Mahony–Burgers equation. The first stage is devoted to discretization in time, which is carried out with the aid of the well-known Taylor series expansions. Then the spectral collocation procedure based on the Boubaker polynomials is applied for the resulting discretized spatial operator in each time step. A detailed error analysis of the presented technique is carried out with regard to the space variable. The advantages of the hybrid technique are shown via performing several simulations through four test examples. Comparisons between our numerical results and the outcomes of some existing schemes indicate that the proposed technique is not only simple and easy-to-implement, but also sufficiently accurate using a moderate number of bases and a large time step.
Acquisition repeatability of MRI radiomics features in the head and neck: a dual-3D-sequence multi-scan study
Authors: Xue Cindy , Yuan Jing , Zhou Yihang , Wong Oi Lei , Cheung Kin Yin , Yu Siu Ki 
Published: April 2022

AbstractRadiomics has increasingly been investigated as a potential biomarker in quantitative imaging to facilitate personalized diagnosis and treatment of head and neck cancer (HNC), a group of malignancies associated with high heterogeneity. However, the feature reliability of radiomics is a major obstacle to its broad validity and generality in application to the highly heterogeneous head and neck (HN) tissues. In particular, feature repeatability of radiomics in magnetic resonance imaging (MRI) acquisition, which is considered a crucial confounding factor of radiomics feature reliability, is still sparsely investigated. This study prospectively investigated the acquisition repeatability of 93 MRI radiomics features in ten HN tissues of 15 healthy volunteers, aiming for potential magnetic resonance-guided radiotherapy (MRgRT) treatment of HNC. Each subject underwent four MRI acquisitions with MRgRT treatment position and immobilization using two pulse sequences of 3D T1-weighed turbo spin-echo and 3D T2-weighed turbo spin-echo on a 1.5 T MRI simulator. The repeatability of radiomics feature acquisition was evaluated in terms of the intraclass correlation coefficient (ICC), whereas within-subject acquisition variability was evaluated in terms of the coefficient of variation (CV). The results showed that MRI radiomics features exhibited heterogeneous acquisition variability and uncertainty dependent on feature types, tissues, and pulse sequences. Only a small fraction of features showed excellent acquisition repeatability (ICC > 0.9) and low within-subject variability. Multiple MRI scans improved the accuracy and confidence of the identification of reliable features concerning MRI acquisition compared to simple test-retest repeated scans. This study contributes to the literature on the reliability of radiomics features with respect to MRI acquisition and the selection of reliable radiomics features for use in modeling in future HNC MRgRT applications.
Quasi-linear analysis of dispersion relation preservation for nonlinear schemes
Authors: Xu Fengyuan , Yan Pan , Li Qin , You Yancheng 
Published: April 2022

AbstractIn numerical simulations of complex flows with discontinuities, it is necessary to use nonlinear schemes. The spectrum of the scheme used has a significant impact on the resolution and stability of the computation. Based on the approximate dispersion relation method, we combine the corresponding spectral property with the dispersion relation preservation proposed by De and Eswaran (J Comput Phys 218:398–416, 2006) and propose a quasi-linear dispersion relation preservation (QL-GRP) analysis method, through which the group velocity of the nonlinear scheme can be determined. In particular, we derive the group velocity property when a high-order Runge–Kutta scheme is used and compare the performance of different time schemes with QL-GRP. The rationality of the QL-GRP method is verified by a numerical simulation and the discrete Fourier transform method. To further evaluate the performance of a nonlinear scheme in finding the group velocity, new hyperbolic equations are designed. The validity of QL-GRP and the group velocity preservation of several schemes are investigated using two examples of the equation for one-dimensional wave propagation and the new hyperbolic equations. The results show that the QL-GRP method integrated with high-order time schemes can determine the group velocity for nonlinear schemes and evaluate their performance reasonably and efficiently.
Obesity-associated Blunted Subcutaneous Adipose Tissue Blood Flow After Meal Improves After Bariatric Surgery
Authors: Saari Teemu , Koffert Jukka , Honka Henri , Kauhanen Saila , U-Din Mueez , Wierup Nils , Lindqvist Andreas , Groop Leif , Virtanen Kirsi A , Nuutila Pirjo 
Published: April 2022

Abstract

Context
Glucose-dependent insulinotropic peptide (GIP) and meal ingestion increase subcutaneous adipose tissue (SAT) perfusion in healthy individuals. The effects of GIP and a meal on visceral adipose tissue (VAT) perfusion are unclear.

Objective
Our aim was to investigate the effects of meal and GIP on VAT and SAT perfusion in obese individuals with type 2 diabetes mellitus (T2DM) before and after bariatric surgery.

Methods
We recruited 10 obese individuals with T2DM scheduled for bariatric surgery and 10 control individuals. Participants were studied under 2 stimulations: meal ingestion and GIP infusion. SAT and VAT perfusion was measured using 15O-H2O positron emission tomography–magnetic resonance imaging at 3 time points: baseline, 20 minutes, and 50 minutes after the start of stimulation. Obese individuals were studied before and after bariatric surgery.

Results
Before bariatric surgery the responses of SAT perfusion to meal (P = .04) and GIP-infusion (P = .002) were blunted in the obese participants compared to controls. VAT perfusion response did not differ between obese and control individuals after a meal or GIP infusion. After bariatric surgery SAT perfusion response to a meal was similar to that of controls. SAT perfusion response to GIP administration remained lower in the operated-on than control participants. There was no change in VAT perfusion response after bariatric surgery.

Conclusion
The vasodilating effects of GIP and meal are blunted in SAT but not in VAT in obese individuals with T2DM. Bariatric surgery improves the effects of a meal on SAT perfusion, but not the effects of GIP. Postprandial increase in SAT perfusion after bariatric surgery seems to be regulated in a GIP-independent manner.
Editorial
Authors: Σοφός Αλιβίζος (Λοΐζος) , ΣΙΑΚΑΣ Σπύρος 
Published: April 2022

Το παρόν τεύχος είναι αφιερωμένο στην εφαρμοσμένη αξιοποίηση βίντεο στην εκπαίδευση, στη βάση της διαθεματικής προσέγγισης ενός κεντρικού θέματος και της διεπιστημονικής ανάδειξης εννοιών από γειτονικές επιστημονικές περιοχές. Στόχος του ειδικού τεύχους είναι να ενθαρρύνει τους εκπαιδευτικούς να δημιουργήσουν βίντεο με εκπαιδευτικό περιεχόμενο και να τα αξιοποιήσουν στη διδασκαλία τους ως διευρυμένα περιβάλλοντα εργασίας και μάθησης.
Όταν μιλάμε για αξιοποίηση βίντεο στην εκπαιδευτική διαδικασία εστιάζουμε σε δύο βασικές διαστάσεις: α) την απόκτηση βασικών γνώσεων και δεξιοτήτων για τη δημιουργία ενός βίντεο και β) την εφαρμογή γνώσεων και δεξιοτήτων για την παραγωγή εκπαιδευτικού υλικού, τόσο για τη δια ζώσης όσο και για την εξ αποστάσεως εκπαίδευση.
Κάθε ένα από τα άρθρα που παρουσιάζεται ακολούθως περιέχει και τις δύο αυτές διαστάσεις και αποτυπώνει τόσο τη φιλοσοφία, τη μεθοδολογία δημιουργίας του βίντεο όσο και την τεκμηρίωση των εκπαιδευτικών δραστηριοτήτων που έχουν παραχθεί.
Σε αυτό το τεύχος, δημοσιεύονται συνολικά 9 άρθρα. Αυτά χωρίζονται σε τρεις κατηγορίες α) τα επιμορφωτικά (4 άρθρα), β) τα ιστορικά (3 άρθρα) και γ) τα κοινωνικά (1 άρθρο). Επιπλέον παρουσιάζεται ακόμα ένα άρθρο που ανήκει στην κατηγόρια της μυθοπλαστικής ταινίας.
Το πρώτο επιμορφωτικό ντοκιμαντέρ με τίτλο «Δεν πετάμε, ανακυκλώνουμε!», αναφέρεται σε θέματα «Περιβαλλοντικής Εκπαίδευσης» όπως στην αποσαφήνιση της έννοιας της ανακύκλωσης, εστιαζόμενη στο σύγχρονο πρόβλημα της ρύπανσης των πόλεων με σκουπίδια. Το δεύτερο με τίτλο «Ζωή χωρίς εξάρτηση» στοχεύει στην ενημέρωση των μαθητών σε θέματα που αφορούν την εξάρτηση από τη χρήση ναρκωτικών ουσιών και μεθόδους για την πρόληψη αυτού. Στο τρίτο με τίτλο «Η διαδρομή του βιβλίου: από το συγγραφέα στον αναγνώστη» περιγράφεται η διαδικασία δημιουργίας ενός βιβλίου και τα επιμέρους στάδια που αυτή περιλαμβάνει. Στο τέταρτο και τελευταίο επιμορφωτικό ντοκιμαντέρ με τίτλο «Έλληνες ζωγράφοι της Σχολής του Μονάχου» παρουσιάζονται οι κύριοι εκπρόσωποι της Σχολής του Μονάχου και τα έργα τους που φιλοξενούνται στην Εθνική πινακοθήκη Αθηνών.
Στο πρώτο ιστορικό ντοκιμαντέρ με τίτλο «Achaia Clauss, το Οινόκαστρο της Μαυροδάφνης» παρουσιάζεται η ιστορία της πρώτης ελληνικής οινοποιίας. Στο δεύτερο με τίτλο «Το Αιγαίο στις φλόγες» γίνεται αναφορά στις μεγαλύτερες και ηρωικότερες ναυμαχίες του Αιγαίου πελάγους. Στο τρίτο με τίτλο «Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών - ιστορία πίσω από το όνομα» πραγματεύεται η ονομασία του Εθνικού και Καποδιστριακού Πανεπιστημιακού Αθηνών (ΕΚΠΑ) και το εκπαιδευτικό έργο του Ιωάννη Καποδίστρια.
Στο κοινωνικό ντοκιμαντέρ με τίτλο «ΕνεργητικΑδρανείς» εστιάζει στη συναισθηματική διάσταση της καθημερινότητας των ανθρώπων την εποχή της πανδημίας Covid-19.
Στο πεδίο των μυθοπλαστικών βίντεο περιέχεται η ταινία με τίτλο «Μόνος στο δρόμο» που ως βασική θεματική έχει την εξαφάνιση των μικρών παιδιών.

Ευχόμαστε καλή ανάγνωση και καλή αξιοποίηση στην εκπαίδευση.
Company Competitiveness Profiles on the example of Polish enterprises in the Silesian Region in 2020
Authors: Flak Olaf , Głód Grzegorz 
Published: April 2022

Motivation: The concept of competitiveness is used to define the ratio of enterprises to competitors and results from many internal features and the ability to deal with an external environment. However, comparing main elements of company competitiveness to each other does not give detailed position in the market sector, which is the main area of competition. Therefore it is necessary to look for a different method of companies comparison in the field of their competitiveness.
Aim: The purpose of this paper is to present a assessment method of company competitiveness based on the Company Competitiveness Profile in a market sector. The Company Competitive Profile consists of different variables of a competitive potential, a strategy of competition and a competitive advantage. This method is verified based on results of the Company Competitiveness Barometer conducted in 2021 in 177 Polish companies in the Silesian Region. The Company Competitiveness Barometer is an online research tool for assessing company competitiveness which has been used by the authors since 2012.
Results: The questionnaire used in the Company Competitiveness Barometer contains 48 questions. 45 of them are related to the characteristics of the company that are affecting its competitiveness, and 3 questions are metric questions. The questionnaire can be found on http://sensorium24.com. There were 2 hypotheses which were verified in the paper: H1: The configuration of the components of the Company Competitiveness Profile is different in different sectors of the economy. H2: Each company can be characterized in a sector by its individual Company Competitive Profile. The papers presents verification of two hypothesis which concern the Company Competitive Profiles and their use in assessment of company competitiveness in an economic sector. This is also an added value and an original contribution to company research methodology.
The problem of using the cost-benefit analysis in making decisions about electromobility development in urban public transport in Poland
Authors: Mercik Anna 
Published: April 2022

Motivation: Polish Act on Electromobility and Alternative Fuels obliges 83 cities to prepare every three years cost-benefit analysis (CBAs) using zero-emission buses (ZEBs) in urban public transport. First-time obligated institutions prepared them in 2018. The organisations indicated in the Act on Electromobility, and Alternative Fuels had experience using this tool, e.g. applying for EU co-financing of investment projects. However, the analysis of the selected documents shows significant differences in the approach to developing CBAs.
Aim: The aim of the study is to identify the most critical problems related to the use of CBA as a decision-making tool for the implementation of investments involving the performance of ZEBs in urban public transport. The study identifies the main advantages and limitations of the instrument. It also proposes introducing requirements by the legislator, which could increase the comparability of CBA results and thus reduce the uncertainty of decisions.
Results: Using CBA as a decision-making tool requires maintaining an appropriate methodological regime. It involves the identification of alternative projects that allow the realisation of the objectives set by the decision-maker. Its essence is to identify the undertaking that will allow achieving the best results from the organisation’s point of view and from the social, environmental, and economic perspective. The research indicates that the lack of explicit guidelines from the legislator concerning the methodology of CBA preparation for the needs of ZEB implementation hinders comparability of the obtained results and reduces uncertainty of decisions made on their basis.
The legitimacy of introducing a simple joint-stock company into the Polish legal order
Authors: Ryszkowski Karol , Witoszek-Kubicka Aleksandra 
Published: April 2022

Motivation: The paper focuses on the legitimacy of introducing the simple joint-stock company (PSA) into the Polish legal order by referring to the financing of the initial phase of business operations. Describes the issue of capital gap, especially significant for capital-intensive innovative enterprises that have a problem obtaining financing due to high operational risk. The work also shows the importance of choosing capital financing sources due to financial risk and development opportunities. It presents an unconventional solution on raising funds for activities through crowdfunding. The paper attempts to answer questions about the legitimacy of introducing a simple joint-stock company into the Polish legal system and potential benefits and threats from the use of this type of company by startups.
Aim: The paper proposes two research aims; verification of the legitimacy of introducing a simple joint-stock company in-to the Polish legal order and presentation of possible impact of the introduction of PSA on the use of crowdfunding as a start-ups financing source.
Results: Thanks to the analysis of the acts and the literature on the subject, potential advantages and disadvantages of introducing PSA into the Polish legal system were identified. The authors take the position that combining the features of a limited liability company with a joint stock company may be the legislator’s response to the needs of the startup community.
Perception of the quality costs in historical hospitality services: evidence from Poland
Authors: Sadkowski Wojciech , Sala Krzysztof 
Published: April 2022

Motivation: The hospitality industry is one of the most important elements of modern tourism. Among the many types of hotels, historical hotels are worth special attention. Such facilities are among the most sublime types of hotels. Opening and operation of historical hotels is connected with costly procedures of renovation and revitalisation, proper arrangement combining tradition with modern technological achievements, as well as ensuring the expected level of quality according to assigned categorisation. The research is motivated by the uniqueness and specificity of historical hotels on the tourist market, including in particular aspects of ensuring an appropriate level of quality.
Aim: The aim of the article is to evaluate the level of knowledge about the quality costs and their calculation in historical hotel services. To properly achieve the objectives of the research, the case study of one of the oldest historical hotels in Poland, the Sycamore Manor Hotel, was used.
Results: Quality costs and their calculation are not used in historical hospitality services. The low level of employees’ knowledge of quality costs, which requires further education and appropriate training, may result from the optional use of the management accounting tool, i.e. quality costing. The employees of the Sycamore Manor Hotel are aware of the implemented processes and their importance in the context of the quality of the provided services, but the lack of involvement of the organisation in the quality costs deprives it of the possibility to gain a competitive advantage on the demanding market of hotel services.
Allergic rhinitis and its impact on airways disease
Authors: Salvador Laia Castro , Chen Christabelle , Ali Runa 
Published: April 2022

Allergic rhinitis is linked to an increased risk of asthma development. Laia Castro Salvador et al discuss the impact of allergic rhinitis and how it can be managed Allergic rhinitis is characterised by symptoms including rhinorrhoea, sneezing, nasal obstruction and itching, which have a great impact on the patient's quality of life. Allergic rhinitis can be classified depending on the frequency and severity of symptoms, and can be sub-divided into seasonal and perennial. Allergic rhinitis is linked to an increased risk of asthma development and both diseases are believed to be different expressions of the same inflammatory process. The aim of the treatment is improving the patient's quality of life by relieving symptoms. Management of allergic rhinitis will encompass a combination of allergen avoidance, pharmacological therapies and patient education and adherence.
Development and validation of a prognostic nomogram for open elbow arthrolysis
Authors: Liu Weixuan , Sun Ziyang , Xiong Hao , Liu Junjian , Lu Jiuzhou , Cai Bin , Wang Wei , Fan Cunyi 
Published: April 2022

Aims The aim of this study was to develop and internally validate a prognostic nomogram to predict the probability of gaining a functional range of motion (ROM ≥ 120°) after open arthrolysis of the elbow in patients with post-traumatic stiffness of the elbow. Methods We developed the Shanghai Prediction Model for Elbow Stiffness Surgical Outcome (SPESSO) based on a dataset of 551 patients who underwent open arthrolysis of the elbow in four institutions. Demographic and clinical characteristics were collected from medical records. The least absolute shrinkage and selection operator regression model was used to optimize the selection of relevant features. Multivariable logistic regression analysis was used to build the SPESSO. Its prediction performance was evaluated using the concordance index (C-index) and a calibration graph. Internal validation was conducted using bootstrapping validation. Results BMI, the duration of stiffness, the preoperative ROM, the preoperative intensity of pain, and grade of post-traumatic osteoarthritis of the elbow were identified as predictors of outcome and incorporated to construct the nomogram. SPESSO displayed good discrimination with a C-index of 0.73 (95% confidence interval 0.64 to 0.81). A high C-index value of 0.70 could still be reached in the interval validation. The calibration graph showed good agreement between the nomogram prediction and the outcome. Conclusion The newly developed SPESSO is a valid and convenient model which can be used to predict the outcome of open arthrolysis of the elbow. It could assist clinicians in counselling patients regarding the choice and expectations of treatment. Cite this article: Bone Joint J 2022;104-B(4):486–494.
Larval source reduction with a purpose: Designing and evaluating a household- and school-based intervention in coastal Kenya
Authors: Forsyth Jenna E. , Kempinsky Arielle , Pitchik Helen O. , Alberts Catharina J. , Mutuku Francis M. , Kibe Lydiah , Ardoin Nicole M. , LaBeaud A. Desiree 
Published: April 2022

Background
Since Aedes aegypti mosquitoes preferentially breed in domestic containers, control efforts focus on larval source reduction. Our objectives were to design and test the effectiveness of a source reduction intervention to improve caregiver knowledge and behaviors in coastal Kenya.

Methodology/Principal findings
We conducted a cluster-randomized controlled trial with 261 households from 5 control villages and 259 households from 5 intervention villages. From each household, one child (10–16 years old) and his or her primary caregiver participated in the intervention. We assessed caregiver knowledge and behavior at baseline, as well as 3 and 12 months after the intervention. We assessed household entomological indices at baseline and 12 months after the intervention to avoid seasonal interference. We conducted qualitative interviews with 34 caregivers to understand barriers and facilitators to change. We counted and weighed containers collected by children and parents during a community container clean-up and recycling event. After 12 months, caregiver knowledge about and self-reported behavior related to at least one source reduction technique was more than 50 percentage points higher in the intervention compared to control arm (adjusted risk differences for knowledge: 0.69, 95% CI [0.56 to 0.82], and behavior: 0.58 [0.43 to 0.73]). Respondents stated that other family members’ actions were the primary barriers to proper container management. The number of containers at households did not differ significantly across arms even though children and parents collected 17,200 containers (1 ton of plastics) which were used to planted 4,000 native trees as part of the community event.

Conclusions/Significance
Our study demonstrates that source reduction interventions can be effective if designed with an understanding of the social and entomological context. Further, source reduction is not an individual issue, but rather a social/communal issue, requiring the participation of other household and community members to be sustained.