bluuebunny/crossref_metadata_2025_split huggingface dataset:
Towards standardized and simplified practices in membrane science: new simplified equations and a proposed protocol for membrane characterization and water flux prediction
Authors: Aschmoneit Fynn , Tiraferri Alberto , Malaguti Marco , Mohamed Madina , Giagnorio Mattia 
Published: March 2023

Abstract
The development of new membranes, membrane materials, and membrane-based separation processes should be accompanied by a standardization of the protocols applied for membrane characterization and for data analysis by the community of academic and industrial stakeholders. For example, there exists no recognized and robust protocol for membrane characterization, with characterization conditions often unreported or unclear, which impairs reproducibility and the possibility of comparison between data originated from different stakeholders. Also, regarding membrane analysis, one of the obstacles to the simple use of the classical transport equations to extract membrane transport parameters and to perform predictive flux calculations, is the fact that the magnitude of concentration polarization must be known, which is not always the case and in all cases complicates calculations requiring numerical solutions. Here, a protocol for the experimental characterization of the transport properties of dense membranes is discussed and the results are compared to those expected from classical models of species transport. In addition, new, streamlined equations for the calculation of the water flux and of the solute permeability coefficient in pressure-driven dense membrane processes and in the presence of salt in the feed stream are presented. In contrast to the classical mathematical expression for water flux, the respective equation proposed in this study is algebraic. This characteristic poses the advantage of simple calculation, whereas the classical equation needs to be solved iteratively or numerically. Moreover, in contrast to the solution of the traditional expression for the solute permeability coefficient, which requires knowledge of the hydrodynamics conditions to estimate the magnitude of concentration polarization, the respective equation proposed in this study only requires readily available bulk parameters. Non-dimensional variables for water flux, driving pressure, and mass transfer are introduced as parameters of the new equations. In particular, the non-dimensional variables address the effect of concentration polarization and relate this phenomenon directly to a decline in water flux, allowing for the definition of a filtration efficiency, a useful parameter also in terms of process design.
Imprecise Evidence in Social Learning
Authors: Liu Zixuan , Crosscombe Michael , Lawry Jonathan 
Published: March 2023

Abstract
Social learning is a collective approach to decentralised decision making and is comprised of two process; evidence updating and belief fusion. In this paper we propose a social learning model in which agents’ beliefs are represented by a set of possible states, and where the evidence collected can vary in its level of imprecision. We investigate this model using agent-based and robot simulations and demonstrate that it is robust to imprecise evidence. Our results also show that certain kinds of imprecise evidence can enhance the efficacy of the learning process in the presence of sensor errors.
Characterization of the soft-tissue wall lining residual periodontal pockets and implications in periodontal wound healing
Authors: Gousopoulou Evangelia , Bakopoulou Athina , Laskaris Dimitrios , Gousopoulos Epameinondas , Apatzidou Danae A. 
Published: March 2023

Abstract
Aim

To characterize the soft-tissue wall of remaining periodontal pockets for wound healing-related parameters versus healthy gingival crevices in the same individuals.

Materials & Methods

Gingival tissue collected from the diseased interface of pockets (GT-biopsies) and from healthy gingival crevices (G-biopsies) were subjected to RT2-profiler PCR-Array for wound healing-related markers and network analysis of differentially expressed genes. Lymphangiogenesis-related gene expression was determined by qRT-PCR. The migration potential of mesenchymal-stem cells isolated from GT-biopsies (GT-MSCs) and G-biopsies (G-MSCs) was evaluated by the Scratch- and the Transwell Migration Assays. The total collagen protein content was determined in GT-MSC and G-MSC homogenates.

Results

Gene-Ontology analysis on significantly upregulated genes expressed in GT-biopsies revealed enrichment of several genes involved in processes related to matrix remodeling, collagen deposition and integrin signaling. No significantly expressed genes were seen in G-biopsies. Regarding lymphangiogenesis-related genes, GT-biopsies demonstrated greater expression for PROX1 than G-biopsies (p = 0.05). Lower migration potential (p < 0.001), yet greater production of collagen protein (p = 0.05) was found for GT-MSCs over G-MSCs.

Conclusion

Differential expression patterns of various molecular pathways in biopsies and cell cultures of diseased versus healthy gingival tissues indicate a potential of the former for tissue remodeling and repair.

Clinical relevance

In the course of periodontitis granulation tissue is formed within a periodontal defect in an attempt to reconstruct the site. Following treatment procedures periodontal granulation tissue remains inflamed but appears to retain healing potential.
Usefulness of mobile apps for achieving sustainable diving tourism
Authors: Demircan Hakan B. , Ozturen Ali , Irani Foad 
Published: March 2023

Abstract

Leisure activities have the potential to have substantial impacts on vulnerable natural resources. Adopting innovative technologies while adhering to sustainability principles is critical for promoting environmental conservation among various stakeholders. This study investigates the effects of mobile applications’ perceived usefulness on achieving sustainable diving tourism through m-learning, environmentally responsible underwater behaviors, green marketing activities, and green competitive advantage. An online questionnaire was conducted at Cyprus and Turkey scuba diving centers and schools. Moreover, the impacts of green competitive advantage and environmentally responsible underwater behaviors of sustainable diving tourism were analyzed. The proposed hypotheses were tested using ADANCO software, a modeling tool for structural equations. This study underlines an essential contribution to the technology management literature regarding the implications of adopting mobile technologies and promoting environmentally responsible underwater behavior. The findings of this study contribute to the extension of the TAM theory to comprehend the impact of the perceived usefulness of mobile applications on recreational scuba diving tourism via knowledge of green market activities, green competitive advantage, M-learning, and environmentally friendly responsible underwater behavior. The results reflect that sustainable diving tourism in Turkey and Cyprus can be realized by adopting mobile applications via environmentally responsible behaviors and activities.
Almost contact metric manifolds with certain condition
Authors: Bayour Benaoumeur , Beldjilali Gherici , Sinacer Moulay Larbi 
Published: March 2023

Abstract
The object of this article is to study a new class of almost contact metric structures which are integrable but non normal. Illustrativeexamples are given.
Mathematics Subject Classification (2010). Primary 53C15; Secondary 53C55.
Evaluation of Intraoperative Peripheral Nerve Stimulator Assisted Percutaneous Medial Pin Placement for Supracondylar Humerus Fractures in Children
Authors: Hamza Mohamed Safwat , El-Mahboub Nehad Mahmoud , Abo-Elfath Ali Mohamed , Ismail Sameh 
Published: March 2023

Abstract
Background: Supracondylar fractures of the humerus are widely regarded as the most common fractures around the elbow in pediatric age group, and account for around 60–70% of all pediatric elbow fractures. Proper management of supracondylar fractures is important as they may lead to undesired catastrophic consequences. The treatment options depend on the fragment displacement degree and the presence of a neurovascular injury. An accepted widely known classification of these fractures is the AO/Gartland system, as modified by Wilkin.
Objective: To assess the accuracy, feasibility, and reliability of the peripheral nerve stimulator during and after medial pin placement in surgical management of supracondylar fractures in children.
Patients and Methods: This prospective interventional clinical trial was conducted on 50 children with supracondylar fracture of humerus; in the Orthopedics Department of Suad Kafafi Teaching Hospital, Misr University for Science and Technology, School of Medicine, Cairo, Egypt. All patients were subjected to complete clinical picture and careful clinical examination. All patients needed X-ray films; AP/lateral view.
Results: Age was distributed as 6.28 ± 2.36 years with minimum of 2 years and maximum of 11 years. Regarding sex distribution, male represents majority with 72% and female with 28%. Median time before surgery was zero with minimum of zero and maximum of 8 days. Intraoperatively, medial epicondyle was palpated in all patients.
Conclusion: The peripheral nerve stimulation during the percutaneous medial pinning of supracondylar fractures in children is a simple, economical, and easily implemented technique, which is helpful in avoiding iatrogenic injury. It can be applied with the equipment already existing in the operation room, as it is also routinely used by anesthesiologists.
A mixed precision LOBPCG algorithm
Authors: Kressner Daniel , Ma Yuxin , Shao Meiyue 
Published: March 2023

Abstract
The locally optimal block preconditioned conjugate gradient (LOBPCG) algorithm is a popular approach for computing a few smallest eigenvalues and the corresponding eigenvectors of a large Hermitian positivedefinite matrix A. In this work, we propose a mixed precision variant of LOBPCGthat uses a (sparse) Cholesky factorization of A computed in reduced precision as the preconditioner. To further enhance performance, a mixed precision orthogonalization strategyis proposed. To analyze the impact of reducing precision in the preconditioner on performance, we carry out a rounding error and convergence analysis of PINVIT, a simplified variant of LOBPCG. Our theoretical results predict and our numerical experiments confirm that the impact on convergence remains marginal.In practice, our mixed precision LOBPCG algorithm typically reduces thecomputation time by a factor of 1.4--2.0 on both CPUs and GPUs.
MSC Classification: c
Prescription of Therapeutic Exercise in Migraine. An Evidence-Based Clinical Practice Guideline of the Professional College of Physiotherapists of the Community of Madrid
Authors: Touche Roy La , Fierro-Marrero José , Sánchez-Ruíz Irene , de Rivera-Romero Borja Rodríguez , Cabrera-López Carlos Donato , Lerma-Lara Sergio , Requejo-Salinas Néstor , Fernández-Martínez Francisco de Asís , Elizagaray-García Ignacio , Fernández-Carnero Josué , Matesanz-García Luís , Pardo-Montero Joaquín , Paris-Alemany Alba , Reina-Varona Álvaro 
Published: March 2023

Abstract
The main objective of this clinical practice guideline is to provide a series of recommendations for healthcare and exercise professionals, such as neurologists, physical therapists, and conditioning coaches, regarding exercise prescription for patients with migraine. This guideline was developed following the methodology and procedures recommended in the Appraisal of Guidelines for Research and Evaluation (AGREE). The quality of evidence and strength of recommendations were evaluated with the Scottish Intercollegiate Guidelines Network (SIGN). A systematic literature review was performed and an established appraisal process was employed to rate the quality of relevant scientific research (Grading of Recommendations Assessment, Development, and Evaluation methodology). The evaluation of the current evidence, the elaboration of the grades of recommendation, and their validation show a B grade of recommendation for aerobic exercise, moderate-continuous aerobic exercise, yoga, and exercise and lifestyle recommendations for the improvement of symptoms, disability, and quality of life in patients with migraine. Relaxation techniques, high-intensity interval training, low-intensity continuous aerobic exercise, exercise and relaxation techniques, and resistance exercise obtained a C grade of recommendation for the improvement of migraine symptoms and disability.
Optimized enantioselective (S)-2-hydroxypropiophenone synthesis by free- and encapsulated-resting Pseudomonas putida cells
Authors: Kordesedehi Reihaneh , Asadollahi Mohammad Ali , Shahpiri Azar , Biria Davoud , Nikel Pablo Iván 
Published: March 2023

AbstractBackgroundAromatic α-hydroxy ketones such as S-2-hydroxypropiophenine (S-2-HPP) are highly valuable chiral building blocks useful for the synthesis of various pharmaceuticals and natural products. In the present study, enantioselective synthesis of S-2-HPP was investigated by free and immobilized whole cells ofPseudomonas putidaATCC 12633 starting from readily-available aldehyde substrates. Whole resting cells ofP. putidagrown in a culture medium containing ammonium mandelate are a source of native benzoylformate decarboxylase (BFD) activity. BFD synthesized by inducedP. putidaresting cells is a highly active biocatalyst without any further treatment in comparison with partially purified preparation. These cells can convert benzaldehyde and acetaldehyde into the acyloin compound 2-HPP by BFD catalyzed enantioselective cross-coupling reaction.ResultsThe reaction was carried out in the presence of exogenous benzaldehyde (20 mM) and acetaldehyde (600 mM) as substrates in 6 ml of 200 mM phosphate buffer (pH 7) for 3 hours. The optimal biomass concentration was assessed to be 0.006 g DCW/ml. 2-HPP titer, yield and productivity using the free cells were 1.2 g L-1, 0.56 g 2-HPP/g benzaldehyde (0.4 mol 2-HPP/mol benzaldehyde), 0.067 g 2-HPP/g DCW h, respectively, under optimized biotransformation conditions (30 ⁰C, 200 rpm). Calcium alginate (CA)–polyvinyl alcohol (PVA)-boric acid (BA)-beads were used for the cell entrapment. Encapsulated whole-cells were successfully employed in four consecutive cycles for 2-HPP production under aerobic conditions without any noticeable degradation of the beads. Moreover, there was no production of benzyl alcohol as an unwanted by-product.ConclusionThus, bioconversion byP. putidawhole resting cells is an efficient strategy for the production of 2-HPP and other α-hydroxyketones.
Noise control for high subsonic jet by inner wall treatment
Authors: Mao Huyue , Tang Xiaolong , Yang Xiaoquan , Ding Jue , Weng Peifen 
Published: March 2023

Abstract
Subsonic jet nozzles, commonly used in passenger aircrafts, generate significant noise that travels both downstream and upstream due to large-scale or fine-scale turbulences in the jet plume. To reduce jet noise, a novel wall treatment method, termed the wavy inner wall (WIW), is proposed. With this method, the smooth inner wall near the exit of the nozzle is replaced by treated walls that carry small wavy patterns. Numerical simulations are conducted to investigate the effects of the WIW treatment. Large eddy simulations (LES) were used to predict the unsteady flow field and the far-field noise, followed by the analogy method proposed by Ffowcs Williams and Hawkings. To better understand the mechanism behind the noise reduction achieved by the WIW treatment, the shear-layer instability, radial and azimuthal auto-correlation functions, turbulent kinetic energy, and acoustic source term from the Tam-Auriault (TA) jet-noise model were analyzed. Results indicated that the WIW treatment advances the onset of jet flow instability in the shear-layer, leading to the early breakdown of jet shear-layer and production of different scales of downstream turbulent structures. As a result, the distribution and production of turbulent kinetic energy are affected, and the generation and emission of jet noise are controlled. The WIW treatment enables the control of fine scale turbulence, resulting in the reduction of mid- to high-frequency noise in the far field, while ensuring a low thrust loss. This feature makes the WIW method a promising approach for jet noise control.
On solutions for several systems of complex nonlinear partial differential equations with two variables
Authors: Xu Hong Yan , Xu Yi Hui , Liu Xiao Lan 
Published: March 2023

Abstract
Note: Please see pdf for full abstract with equations.
This article is devoted to describe the entire solutions of several systems of the first order nonlinear partial differential equations. By using the Nevanlinna theory and the Hadamard factorization theory of meromorphic functions, we establish some interesting results to reveal the existence and the forms of the finite order transcendental entire solutions of several systems of the first order nonlinear partial differential equations. Moreover, some examples are given to explain that there are significant differences in the forms of solutions from some previous systems of functional equations.
(auz1 + buz2) (cvz1 + dvz2) = eg,
(avz1 + bvz2) (cuz1 + duz2) = eg,

(auz1 + bvz2) (cuz2 + dvz1) = eg,
(auz2 + bvz1) (cuz1 + dvz2) = eg,
and
(auz1 + bvz1) (cuz2 + dvz2) = eg,
(auz2 + bvz2) (cuz1 + dvz1) = eg,
where a, b, c, d ∈ C, and g is a polynomial in C2. Moreover, some examples are given to explain that there are significant differences in the forms of solutions from some previous systems of functional equations.
Mathematical Subject Classification (2010): 30D35, 35M30.
Major depressive disorders and the risk of susceptibility to COVID-19 infection and hospitalization: findings from the Employees’ Health Cohort Study of Iran (EHCSIR)
Authors: Nasirpour Nastaran , Esmailzadehha Neda , Hajebi Ahmad , Savari Ebtesam , Motevalian Abbas 
Published: March 2023

Abstract
Purpose
The association of major depressive disorder (MDD) with higher risk of susceptibility to COVID-19 infection and hospitalization remained inconclusive. The aim of this study was to assess the both hypotheses in the Employees’ Health Cohort Study of Iran (EHCSIR).
Methods
Among 4886 EHCSIR participants, 3355 subjects who had a complete data on major depressive disorder and two annual telephone follow-ups from January 2020 to March 2022 were recruited in this study. Trained psychologists applied the Persian version of the Composite International Diagnostic Interview (CIDI-2.1) to recognize major depressive disorders at baseline assessment. Log binomial regression models were separately applied to investigate the association between MDD and risk of susceptibility to COVID-19 infection and hospitalization, adjusting for sociodemographic factors and background health conditions.
Results
The lifetime and twelve-month prevalence of MDD at the baseline of the cohort study were 11.4% and 7.3%, respectively. During the pandemic, 876 (26.1%) of the participants were infected with COVID-19 and 126 of these patients (14.4%) were hospitalized. The risk of susceptibility to COVID-19 infection among study participants who had lifetime MDD was significantly higher than unexposed participants (ARR = 1.24, 95% CI: 1.06–1.47). Among the COVID-19 cases, neither lifetime MDD (ARR = 1.26, 95% CI: 0.71–2.24) nor twelve-month MDD (ARR = 1.02, 95% CI: 0.48–2.15) was independently associated with hospitalization.
Conclusion
Preexisting major depressive disorder may cause a higher risk of susceptibility to COVID-19 infection, but it is not associated with higher risk of COVID-19 hospitalization.
Comparison of triplanar Chevron osteotomy with Chevron osteotomy in the treatment of hallux valgus for preventing transfer metatarsalgia
Authors: Cao Jianming , Guo Jialiang , Xu Lihui , Ni Yulong , Niu Chao , Jin Liang , Zhang Fengqi 
Published: March 2023

Abstract
Background: Hallux valgus (HV) is often accompanied by metatarsalgia. The purpose of this study was to compare the radiological and clinical outcomes of the new triplanar Chevron osteotomy (TCO) and Chevron osteotomy (CO) in the treatment of hallux valgus (HV), especially on plantar callosities and metatarsalgia.
Methods: In this retrospective analysis, 90 patients (45 patients per group) with mild to moderate HV and plantar callosities were treated with TCO and CO from July 2020 to January 2022. In both procedures, the apex was located in the centre of the head of the first metatarsal bone, and the CO was oriented towards the fourth MTPJ at a 60° angle. Plantar-oblique Chevron osteotomy (POCO) was defined as Chevron osteotomy and a 20° plantar tilt; TCO was defined as POCO-based metatarsal osteotomy with a 10° tilt towards the metatarsal head. Primary outcome measures included X-ray measurements of the preoperative and postoperative HVA, IMA, DMAA, FML, SMHH and clinical measurements including VAS and AOFAS scores and changes in callosity grade and area and in the number of people with metatarsalgia. Secondary outcomes included complications, recurrence rates, and cosmetic appearance.
Results: The HVA, IMA, and DMAA measurements were signiﬁcantly decreased after surgery (P <0.001) in all patients. In the TCO group, the mean FML and SMHH increased significantly postoperatively (P<0.001). The AOFAS and VAS scores improved postoperatively in both groups (P < 0.001). All patients experienced satisfactory pain relief and acceptable cosmesis. The plantar callosity areas were smaller postoperatively in both the TCO and CO groups, but the change in the area (Δarea) of the TCO group was significantly different from that of the CO group (P < 0.001). The number of postoperative metatarsalgia patients and the plantar callosity grades in the TCO group were both significantly lower than those in the CO group after osteotomy (P<0.05 for both).
Conclusions: TCO prevents dorsal shift of the metatarsal head and preserves and even increases the FML, thereby preventing future metatarsalgia in patients. Therefore, compared with CO, TCO has better orthopaedic outcomes and is an effective method for treating mild to moderate HV and preventing transfer metatarsalgia.
Deriving Full-Range Vapor Pressure Equation and Acentric Factor from Boiling Point, and Estimation of Critical Pressure
Authors: Lee Jai-yeop 
Published: March 2023

Abstract
In a vapor pressure equation in the form of the Antoine equation, A and B can be expressed as van der Waals constants. If C is defined as c by dividing it into gas constant and critical temperature, c can be expressed as a function in the form of a third-degree polynomial of reduced temperature. Using this, the vapor pressure of full-range temperature can be calculated. The c function is third-degree polynomial, but since the values are known at absolute zero and critical points, there are two required coefficients. Using the characteristics of the c function, a full-range vapor pressure equation can be derived from only one vapor pressure data such as boiling point, and acentric factor can be obtained, and critical pressure estimated. For 32 substances including 6 elements, this method was applied to estimate the full-range vapor pressure, acentric factor, and critical pressure from only the boiling point data, and the results were compared with actual data. In addition, it was applied to 16 elements to derive a full-range vapor pressure equation. Using the characteristics of local minimum point, the critical pressures of unknown elements like phosphorous, arsenic, and gold could be estimated in addition to the 21 elements whose critical pressures were previously known.