bluuebunny/crossref_metadata_2025_split huggingface dataset:
Hybrid modeling of P-SV seismic motion at inhomogeneous viscoelastic topographic structures
Authors: Moczo Peter , Bystrický Erik , Kristek Jozef , Carcione José M. , Bouchon Michel 
Published: April 2023

Abstract
A new hybrid two-step method for computation of P-SV seismic motion at inhomogeneous viscoelastic topographic structure is presented. The method is based on a combination of the discrete-wavenumber (DW), finite-difference (FD), and finite-element (FE) methods. In the first step, the DW method is used to calculate the source radiation and wave propagation in the background 1D medium. In the second step, the FD-FE algorithm is used to compute the wave propagation along the topographic structure.
The accuracy of the method has been separately tested for inclusion of the attenuation and for inclusion of the free-surface topography through numerical comparisons with analytical and independent numerical methods.
The method is a generalization of the hybrid DW-FD method of Zahradník and Moczo (1996) for localized structures with a flat free surface.
Numerical computations for a ridge, sediment valley, and the ridge neighboring the sediment valley show that a ridge can considerably influence the response of the neighboring sediment valley. This means that the neighboring topographic feature should be taken into account even when we are only interested in the valley response.
Comparison of Pre-oxygenation with Single Vital Capacity Breath Technique and Tidal Volume Breathing Technique for Adult Patients Undergoing General Anaesthesia
Authors: Yadav Avnesh , Khurana Tina , Nagpal Vijay Kumar , Kaur Mohandeep 
Published: April 2023

Background: Pre-oxygenation before induction of general anaesthesia is widely used for enhancing oxygen reserves and preventing hypoxia. Several techniques for pre-oxygenation have been described. This study was designed to compare the PaO2 and ETO2 with single vital capacity breath technique (SVCB) and tidal volume breathing technique (TVB) for adult patients undergoing general anaesthesia.
Methods: Fifty patients were pre-oxygenated with both techniques - first SVCB then TVB separated by five minutes of breathing room air or till ETO2 & PaO2 values reached baseline values (whichever was later). ABG samples & ETO2 readings were taken before pre-oxygenation & every thirty seconds for three minutes in both techniques.
Results: Pre-test, mean PaO2 and ETO2 values of both techniques (SVCB and TVB) were similar. In SVCB technique, the mean PaO2 (mmHg) and ETO2 (%) significantly increased at 30 seconds (p ≤ 0.001) from 95.26 and 17.14 (pre-test time) to 304.34 and 92.48 respectively. In TVB technique, an exponential increase was noted. The mean PaO2 (mmHg) and ETO2(%) significantly increased at 180 seconds (p ≤ 0.001) from 96.26 and 16.26 (pre-test time) to 305.64 and 93.08 respectively. Peak values of oxygenation in both groups were similar but achieved at different time points.
Conclusion: SVCB technique achieves high oxygenation rapidly but is not sustained thus can be used for rapid sequence induction though not recommended for difficult airway scenarios. TVB technique also achieves high oxygenation but steadily. TVB may be used for induction, including, rapid sequence induction but after 3-5 minutes of pre-oxygenation.
Badania zaczynów cementowych przeznaczonych do uszczelniania kolumn rur okładzinowych w podziemnych magazynach wodoru w sczerpanych złożach węglowodorów
Authors:   Instytut Nafty i Gazu – Państwowy Instytut Badawczy, Rzepka Marcin , Kędzierski Miłosz ,   Instytut Nafty i Gazu – Państwowy Instytut Badawczy
Published: April 2023

Prezentowany artykuł omawia zagadnienia dotyczące technologii zaczynów cementowych proponowanych do uszczelniania kolumn rur okładzinowych w podziemnych magazynach wodoru w sczerpanych złożach węglowodorów. Do badań laboratoryjnych wytypowano dziesięć receptur zaczynów zawierających różne dodatki i domieszki (m.in. nanomateriały, tj. nano-SiO2, nano-Al2O3, lateksy, polimery wielkocząsteczkowe). Badania receptur prowadzono w temperaturze 60°C pod ciśnieniem 25 MPa, stosując w składach zaczynów domieszkę odpieniającą, upłynniającą, antyfiltracyjną oraz opóźniacz wiązania. Badania wykonywano na dwóch rodzajach cementów: portlandzkim CEM I 42,5 oraz wiertniczym klasy G. Określano parametry technologiczne świeżych i stwardniałych zaczynów cementowych, badając: gęstość, odstój wody (wolną wodę), reologię, czasy gęstnienia, a także wytrzymałość na ściskanie, porowatość oraz szczelność rdzeni cementowych względem wodoru. Płynne zaczyny cementowe posiadały prawidłowe parametry technologiczne (były dobrze przetłaczalne w warunkach HPHT, a ich gęstości wynosiły 1,80–1,91 g/cm3). Wytrzymałości na ściskanie stwardniałych zaczynów cementowych po okresie od 2 dni do 28 dni hydratacji, zwłaszcza w przypadku próbek z dodatkiem nanokomponentów, przyjmowały bardzo wysokie wartości (po 28 dniach przekraczając 40 MPa). Próbki kamieni cementowych posiadały bardzo niską zawartość porów kapilarnych, co ogranicza możliwość tworzenia się kanalików w płaszczu cementowym otworu wiertniczego. W większości próbek pory o najmniejszych rozmiarach (poniżej 100 nm) stanowiły zdecydowaną większość (powyżej 95–97%) ogólnej ilości porów występujących w matrycy cementowej. Najkorzystniejsze parametry technologiczne uzyskano w przypadku próbek zawierających nano-SiO2 (nanokrzemionkę), a optymalny współczynnik wodno-cementowy dla takich zaczynów kształtował się na poziomie około 0,46–0,48 – w zależności od rodzaju zastosowanego cementu. Najniższe wartości przenikalności dla wodoru zanotowano dla receptur zawierających nanokrzemionkę (nano-SiO2). Receptury o najlepszych parametrach technologicznych, zawierające nanokomponenty (po wykonaniu szczegółowych testów), będą mogły znaleźć zastosowanie podczas uszczelniania rur okładzinowych w otworach wierconych w celu magazynowania wodoru.
Exploring the Contingent Role of Effort Expectancy on Online Purchase Intention in E-commerce Application
Authors: Octalina Lydia Ery , Rahimah Anni , Arifin Zainul 
Published: April 2023

Objective: This study examines the influence of hedonic and utilitarian values on perceived benefits and their impact on purchase intention by using effort expectancy as a moderating variable.
Design/Methods/Approach: This study adopts a quantitative approach by employing a non-probability sampling technique to collect a sample of 175 respondents who had used the Shopee application in Malang. The data was analyzed using SmartPLS through the measurement model test (outer model) and structural model test.
Findings: The results show that hedonic value and utilitarian value have a positive and significant effect on perceived benefit, hedonic value and utilitarian value have a positive and significant impact on purchase intention, and perceived benefit has a positive and significant effect on purchase intention. However, effort expectancy does not have a significant role in moderating the relationships.
Originality/Value: The limited extant literature only addresses a simple direct–effect relationship between effort expectancy toward behavioral intention and use behavior. Drawing on the Unified Theory of Acceptance and Use, this research provides deep insight through position effort expectance as the moderation role. Also, this study elaborates on the effect of utilitarian and hedonic values on perceived benefit. In turn, this framework also explored the influence of perceived benefit on consumer intention to purchase in electronic commerce, further advancing an understanding of this dynamic subject matter.
Practical/Policy Implications: The study contributes to the existing knowledge of managerial practice by pointing out the importance of effort expectancy, which shapes the consumer's perceived benefit, and illustrating its impact in the case of purchasing intention in an e-commerce application. E-commerce companies can enhance the customer experience when accessing applications to invigorate purchase intention. E-commerce companies need to maintain their performance in terms of app ease of use and provide innovations by providing more user benefits, thereby creating loyal customers. Eventually, the company should keep earning society's trust as reliable e-commerce that meets the needs of today's digital era.
The Role of Community Benefits on Brand Loyalty in Automotive Social Media Brand Community
Authors: Novianti Puspita Pratama , Balqiah Tengku Ezni 
Published: April 2023

Objective: This study examines the benefits of online brand community interactivity in social media in the Indonesian automotive sector.
Design/Methods/Approach: The proposed model was empirically assessed using survey data from 332 Indonesian-based automobile online brand community members on social media. In addition, the link between the constructs in the research model was examined using SEM PLS.
Findings: The findings strongly link perceived interactivity and community benefits. In Addition, the results also demonstrate that community members' trust in a brand strongly and positively impacts brand loyalty. Special treatment and a sense of membership increase members' trust in the brand and community satisfaction. However, social influence has negligible effects on community satisfaction.
Originality/Value: This study combines value, trust, and satisfaction as the mediating variables in the relationship between interactivity in the online community and loyalty.
Practical/Policy implication: Given the results, brands should provide flexibility to access information or content by optimizing the usage of social media features that members can easily access anytime, such as adding links to the Instagram bio or description on Facebook or WhatsApp groups. Enhancing these community benefits can be done by ensuring that the information circulated within the community is accurate and informative.
How Does Conventional Travel Agent Services Enhance Brand Loyalty? The Relationship Between Customer Experience, Brand Credibility, and Brand Trust
Authors: Andriyani Ni Kadek Reinita , Yudhistira Putu Gde Arie 
Published: April 2023

Objective: This study examines the relationship between customer experience and brand loyalty mediated by brand credibility and brand trust. Design/Methods/Approach: Primary data was collected using a questionnaire with a purposive sampling technique. A total of 363 respondents who had used one of the conventional travel agent services in Bali participated in this study. The Partial Least Square Structural Equation Model (PLS-SEM) was used to analyze the data through outer and inner models using SmartPLS 4. Findings: This study discovered that customer experience positively has a direct and indirect impact on brand loyalty with the mediating effect of brand credibility and brand trust. Originality: The existing literature supports the direct influence of customer experience on brand loyalty in various industries. However, no other study has investigated the mediating role of brand credibility and brand trust on the relationship between customer experience and brand loyalty. This comprehensive study filled the gap between customer experience and brand loyalty in travel agent services. Practical/Policy implication: This study offered managerial implication. By considering customer experience a competitive advantage, managers can actively evolve several experiential marketing strategies to cultivate brand credibility and trust to impact brand loyalty.
The Effect of Authentic Leadership on Organizational Citizenship Behavior: The Role of Psychological Empowerment and Quality of Working Life
Authors: Emur Alvin Permana , Widyasari Maulidya Niken , Kinnary Nyimas Ratna , Putra Rizky Narendra 
Published: April 2023

Objective: This study aims to investigate the influence of authentic leadership on organizational citizenship behavior (OCB) and examine the role of psychological empowerment and quality of working life (QWL) as mediation in the construction of proposed relationships.
Design/Methods/Approach: This study adopts a quantitative method by conducting cross-sectional surveys of multi-sectoral employees in Jakarta, and Surabaya, resulting in 271 respondents. The collected data were analyzed using structural equation models with SmartPLS 3.0 and tested with hierarchical component models or second-order constructs.
Findings: The findings of this study show that QWL and psychological empowerment are important variables in mediating the effects of authentic leadership to encourage employees to be willing to demonstrate OCB in the work environment.
Originality/Value: This study contributes to the existing literature by investigating the role of psychological empowerment and QWL mediation variables in mediating the indirect influence of authentic leadership on OCB in the Indonesian context. The findings from this study provide theoretical insights and practical implications for authentic leadership in organizations, as well as the foundation for continuous research into QWL and psychological empowerment that may have a solid direct influence and full mediation role on employees’ OCB.
Practical/Policy implication: Given the results, human resource managers must try their best to fulfill aspects of the quality of working life and increase employee psychological empowerment. Because both variables play an important role in determining the positive effect of authentic leadership on the OCB of employees in the organization
Delayed Failure of M6-C Cervical Disc Arthroplasty After Conversion of Adjacent Cervical Disc Arthroplasty to Fusion
Authors: Clohisy John C. F. , Abjornson Celeste , Bauer Thomas W. , Baral Elexis , Albert Todd J. 
Published: April 2023

Case:
We present a delayed failure of an M6-C cervical disc arthroplasty after conversion of a subjacent failed cervical disc arthroplasty to fusion. The annular component had failed, and the core had been ejected. Histology demonstrated a giant cell reaction to polyethylene debris, and tissue cultures were positive for Cutibacterium acnes.

Conclusion:
This is the first report of M6-C failure after conversion of an adjacent arthroplasty to fusion. A growing number of reports surrounding the M6-C failure rate and mechanisms raise concern about the device's durability and underscore the importance of routine clinical and radiographic surveillance for these patients.
Joint Space Narrowing in the Osteoarthritic Knee
Authors: Vespe Joseph S. , Hope Donald , Vizurraga David E. , Joyce Meghan 
Published: April 2023

Background:
When patients with knee osteoarthritis (OA) are referred to an orthopaedic specialist for care, standard evaluation includes anterior-to-posterior (AP) weight-bearing (WB) radiographs to best evaluate the degree of arthritis and residual joint space, which can tailor treatment recommendations. Primary care guidelines do not require radiographs for their diagnosis; if performed, they are often non–weight-bearing (NWB). This study assessed the significance of joint space narrowing (JSN) between NWB and WB knee radiographs in patients evaluated for OA. We also compared demographic data with the measure of JSN.

Methods:
This was a prospective quantitative study that followed an experimental design comparing the JSN of the same AP NWB knee with WB knee radiographs. Two blinded fellowship-trained orthopaedic adult reconstruction surgeons and 1 musculoskeletal radiology fellow performed the joint space measurements. Data were analyzed using the Student t test and χ2 test as appropriate.

Results:
The mean JSN between WB and NWB was 1.20 mm (95% confidence interval 0.93-1.49 mm, p < 0.0001). Interrater reliability between NWB and WB measurements was 0.87 and 0.93, respectively. As body mass index (BMI) increased in our population, the amount of JSN decreased. There were significantly higher rates of JSN in those who were not obese compared with those who were.

Conclusions:
Weight-bearing radiographs are better able to evaluate JSN than NWB. BMI had a negative correlation with JSN in our population.

Level of Evidence:
II.
Minimal Clinically Important Difference and Patient-Acceptable Symptom State in Orthopaedic Spine Surgery
Authors: Adindu Ebubechi K. , Singh Devender , Geck Matthew , Stokes John , Truumees Eeric 
Published: April 2023

» Minimal clinically important difference (MCID) and patient-acceptable symptom state (PASS) are both metrics at interpreting patient-reported outcome measures (PROMs).» MCID values tend to vary significantly depending on the baseline pain and function in both acute and chronic symptom states while PASS thresholds are more stable.» MCID values are more easily attainable than PASS thresholds.» Although PASS is more relevant to the patient, it should continue to be used in tandem with MCID when interpreting PROM data.
Effects and mechanisms of Tai Chi on mild cognitive impairment and early-stage dementia: A scoping review
Authors: JASIM Nibras , Balakirishnan Darsiha , Zhang Han , Steiner-Lim Genevieve Z. , Karamacoska Diana , Yang Guo-Yan 
Published: April 2023

Abstract

Background:Dementia is associated with cognitive and functional decline that significantly impacts quality of life. There is currently no cure for dementia, thus, it is important to manage dementia in the early stages and delay deterioration. Previous studies have documented a range of health benefits of Tai Chi in people with early-stage dementia, however, none have systematically integrated these effects with their underlying mechanisms. The aims of this study were to: (1) identify the neurocognitive, psychological, and physical health benefits of Tai Chi oi people with early-stage dementia, and (2) explore the underlying mechanisms of these effects.Methods:We searched systematic reviews (SRs) and randomised control trials (RCTs) on Tai Chi for adults aged 50 years and older with mild cognitive impairment (MCI) or early-stage dementia in MEDLINE, PubMed, Cochrane Library, EMBASE, and major Chinese databases. No language or publication restrictions were applied. Risk of bias was assessed.Results:Eight SRs with meta-analyses and 6 additional published RCTs revealed inconsistent findings of Tai Chi on improving global cognitive function, attention and executive function, memory and language, and perceptual-motor function. There was no significant between-group difference in depressive symptoms. The results from the RCTs showed that Tai Chi can reduce arthritis pain and slow the progress of dementia. No studies on MCI or early-stage dementia investigating the underlying mechanisms of Tai Chi were identified. Instead, 9 mechanistic studies on healthy adults were included. These suggested that Tai Chi may improve memory and cognition via increased regional brain activity, large-scale network functional connectivity, and regional grey matter volume.Conclusion:The effects of Tai Chi on neurocognitive outcomes in people with MCI and early-stage dementia are still inconclusive. Further high-quality clinical trials and mechanistic studies are needed to understand if and how Tai Chi may be applied as a successful intervention to delay deterioration and improve quality of life in people with increased risk of cognitive decline.
Dynamic information transfer in vibration signal applied to early fault detection of hydropower generation unit
Authors: Wang Pengfei , Ren Shengmin , Deng Yuwen , Chen Diyi , Ma Chao , Yang Zhenbiao , Wu Yajun 
Published: April 2023

Abstract

Early fault detection of hydropower generation unit (HGU) is of great significance for the safe operation of the hydropower plant. Most of the related research focuses on the decomposition and feature extraction of single vibration monitoring signals. However, HGU is a typical coupling system with multi-channel vibration signals, and the subtle information transfer among signals is the precursor factor leading to the changes in the whole system. There has not been any research considering this potential factor in HGU or other system. Here, we proposed a novel monitoring method based on dynamic information transfer and principal component analysis (DIT-PCA). The process state of the unit is monitored by principal component analysis of the subtle dynamic transmitted information between the unit monitoring variables, which information is revealed for the first time. Normal monitoring samples are used for the offline training at first. Then, the confidence limits and fault contribution rates of two monitoring indicators Hotelling statistic and square prediction error of the model after training are applied to monitor the same test samples to achieve online fault detection and location. Moreover, the proposed model is applied to the state process of a real HGU, which has a superior sensitivity than two available detection methods. The results provide a direct reference for the early fault detection of the engineering system.
The Predictive Value of 3D Imaging Reconstruction Models in Patients with Vascular Resection for Pancreatic Surgery.
Authors: Quijano Yolanda , Vicente Emilio , Duran Hipolito , Diaz Eduardo , Fabra Isabel , Caruso Riccardo , Malave Luis , Ruiz Pablo , Naldini Chiara , De Nobili Giovanni , Ferri Valentina 
Published: April 2023

Abstract

Introduction
Vascular infiltration in pancreatic cancer represents the main limitation for surgery in locally advanced disease. Therefore an accurate preoperative study is mandatory to plan the most adequate surgical strategy. In the latest years, medical image fusion and three dimensional reconstruction models have gained wider acceptance in general surgery, especially in the hepatic field. Also for what concernes the pancreatic surgery, 3D reconstruction may allow a better preoperative staging if compared to traditional imaging studies.
The aim of this study is to compare 3D imaging reconstruction model with conventional CT scan, MRI and Ecoendoscopy performance in patients undergoing pancreatic surgery with associated vascular resection.
Materials and Methods
Patients with pancreatic cancer who underwent surgery with vascular resection at the Sanchinarro University Hospital from June 2020 to June 2021 were retrospectively reviewed. For each patient a preoperative 3D reconstruction with 3D Cella Medical Solutions (3D-MSP®) model was realised and then compared with traditional imaging methods (CT, MRI and Eco endoscopy).
Results
We enrolled 10 patients who underwent pancreatic surgery with associated vascular resection. The diagnostic accuracy in detection of celiac trunk involvement was of 100%, 80%, 70% and 90% for 3D-reconstruction, CT Scan, MRI and Ecoendoscopy groups respectively. On the other hand, in relation to the portal-mesenteric trunk invasion, 3D-reconstruction has demonstrated a 100% rate of accuracy comparing with an accuracy of 25%, 50% and 30% of CT scan, MRI and Ecoendoscopy respectively. As concerning the precision in estabilishing the tumor size, 3D model was superior to the CT and MRI at the Bland–Altman comparison.
Conclusion
3D imaging reconstruction technique is a helpful preoperatory tool in patients affected by pancreatic cancer with vascular involvement. More studies with larger series are needed to confirm these preliminary results.