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Publications - 6278

Dissipative dynamics in the free massive boson limit of the sine-Gordon model

Ádám Bácsi Balázs Dóra Balázs Dóra Cǎtǎlin Paşcu Moca Gergely Zarand

Publication Name: Scipost Physics Core

Publication Date: 2022-01-01

Volume: 5

Issue: 1

Page Range: Unknown

Description:

We study the dissipative dynamics of one-dimensional fermions, described in terms of the sine-Gordon model in its free massive boson or semi-classical limit, while keeping track of forward scattering processes. The system is prepared in the gapped ground state, and then coupled to environment through local currents within the Lindblad formalism. The heating dynamics of the system is followed using bosonization. The single particle density matrix exhibits correlations between the left and right moving particles. While the density matrix of right movers and left movers is translationally invariant, the left-right sector is not, corresponding to a translational symmetry breaking charge density wave state. Asymptotically, the single particle density matrix decays exponentially with exponent proportional to -γt|x|∆2 where γ and ∆ are the dissipative coupling and the gap, respectively. The charge density wave order parameter decays exponentially in time with an interaction independent decay rate. The second Rényi entropy grows linearly with time and is essentially insensitive to the presence of the gap.

Open Access: Yes

DOI: 10.21468/SciPostPhysCore.5.1.004

Pantoprazole before endoscopy in patients with gastroduodenal ulcer bleeding: Does the duration of infusion and ulcer location influence the effects?

Milán Szalai Tibor Kárász Istvan Racz Nora Dancs Andrea Szabó Zoltán Horváth Mihaly Csöndes

Publication Name: Gastroenterology Research and Practice

Publication Date: 2012-11-19

Volume: Unknown

Issue: Unknown

Page Range: Unknown

Description:

The aim of this study was to investigate the effect of preemptive pantoprazole infusion on early endoscopic findings in patients with acute ulcer bleeding. Records of 333 patients admitted with acute ulcer bleeding were analyzed. Ulcer bleeders were given either 80 mg bolus of pantoprazole followed by continuous infusion of 8 mg per hour or saline infusion until endoscopy. In 93 patients saline infusion whereas in 240 patients bolus plus infusion of pantoprazole was administrated with mean (±SD) durations of 5.45±12.9 hours and 6.9±13.2 hours, respectively (P=0.29). Actively bleeding ulcers were detected in 46/240 (19.2) of cases in the pantoprazole group as compared with 23/93 (24.7) in the saline infusion group (P=0.26). Different durations of pantoprazole infusion (04 hours, >4 hours, and >6 hours) had no significant effect on endoscopic and clinical outcome parameters in duodenal ulcer bleeders. Gastric ulcer bleeders on pantoprazole infusion longer than 4 and 6 hours before endoscopy had actively bleeding ulcers in 4.3 and 5 compared to the 19.5 active bleeding rate in the saline group (P=0.02 and P=0.04). Preemptive infusion of high-dose pantoprazole longer than 4 hours before endoscopy decreased the ratio of active bleeding only in gastric but not in duodenal ulcer patients. © 2012 Istvan Rácz et al.

Open Access: Yes

DOI: 10.1155/2012/561207

Analysis of epstein frame by finite element method

Miklós Kuczmann Zoltan Nemeth

Publication Name: Przeglad Elektrotechniczny

Publication Date: 2019-01-01

Volume: 95

Issue: 6

Page Range: 23-26

Description:

An Epstein frame has been built, which is used to measure magnetic properties of different kind of cores. Sinusoidal voltage excitation has been used in a frequency range of 1-400Hz. The measurements have been performed by a computer-controlled measurement system. The building and the measurement process have been published before. The objective of this work is to compare the simulation results performed with the COMSOL Multiphysics build-in modules and some potential formulation. For this work the Jiles-Atherton model has been chosen to prescribe hysteresis phenomena. The model parameters can be obtained by using the measurement results. The frame has been modelled in 2D.

Open Access: Yes

DOI: 10.15199/48.2019.06.05

The Role of Media in Sponsorship Decision Making During Covid-19: A Malaysian Perspective

Nurzihan Hassim Suffian Hadi Ayub Rosli Mohammed Mohamad Noor Salehhuddin Sharipudin Kim Shyan Fam

Publication Name: Jurnal Komunikasi Malaysian Journal of Communication

Publication Date: 2022-01-01

Volume: 38

Issue: 2

Page Range: 182-197

Description:

COVID-19 has impacted not only human lives, but also business organisations. The repercussions of the pandemic on global businesses include sustaining the value of a firm that could benefit stakeholders, such as the challenge for sponsored properties to attain sponsorship through a period of financial struggles and the capacity of a sponsor to provide it. It is imperative for business-to-business (B2B) communities to evaluate criteria and risks of sponsorship to instil public trust and consequently result in value creation for firms. At the same time, the role of the media is pivotal to create visibility of this partnership and achieve set sponsorship aims. With that said, the objective of this study is to explore the role of sponsorship decision making by Malaysian organisations during the pandemic and how the media have strengthened relationship marketing between businesses and their stakeholders; by examining the determinant factors of using media as an activation in sponsorship and the criteria of using media in sponsorship. The qualitative study conducted interviews with 13 corporate communication and marketing managers in Malaysia that are involved directly with sponsorship activation. The findings highlight the sponsorship ecosystem through the Malaysian media and B2B perspectives that would guide practitioners in making strategic decisions on B2B sponsorship matters, particularly on the relational approaches and media engagement should be seen as part of good business conduct. Future recommendation of this research is to seek the perceptions of consumers on the congruence of relationship marketing through sponsor-sponsored properties collaboration in Malaysian media.

Open Access: Yes

DOI: 10.17576/JKMJC-2022-3802-11

Symptomatology of hypoglycemia in diabetes: A bibliometric analysis (2000-2022) of bayesian approaches

Hani Syahida Zulkafli Md Abdullah Al Mamun Nazihah Mohamed Ali Afsana Al Sharmin Rubaiya Shafrin

Publication Name: Multidisciplinary Reviews

Publication Date: 2025-03-01

Volume: 8

Issue: 3

Page Range: Unknown

Description:

Hypoglycemia poses a critical challenge in managing diabetes. Existing literature, while extensive, lacks a holistic perspective. This study aims to bridge this gap by combining bibliometric analysis and a comprehensive review of Bayesian analysis-related hypoglycemic issues. This study employed data from the SCI-EXPANDED database for bibliometric analysis. The keywords "symptom" or "symptoms," "hypoglycemic" or "hypoglycemia," or "hypoglycaemia" or "hypoglycaemic," and "Diabetes" or "Diabetic" or "Diabetics" were used to locate 1,596 documents from 2000 to 2022. Document types, authorship patterns, and citation metrics were examined. Bayesian methodologies were systematically reviewed across various diabetes types and evaluated using specific assessment tools. Most of the articles published in "Endocrinology & Metabolism" contributed 37.2% of total articles, with a notable CPP2022 (Citations Per Publication (CPP)) of 35, and the main publication type were articles with an average of about six authors and over 32,000 citations in 2022. The United States (US) consistently leads in the number of published articles, followed by China, Japan, and India. Novo Nordisk led institutions with 36 publications and a substantial CPP2022 of 60.9. The comprehensive review emphasized that Bayesian statistical modeling is widely used for adult Type 1 and Type 2 diabetes but is limited in child Type 1 and absent in Gestational Diabetes (GAD) research. In contrast, Bayesian Networks (BNs) are mainly applied to adult Type 2 diabetes, with gaps in other types. Furthermore, Bayesian Neural Networks (BNNs) are prevalent in adult and child Type 1 studies but not applied to Type 2 or GAD. Since 2010, Total Publications (TP) have increased rapidly, indicating increased interest in researching hypoglycemia. Outlining potential research directions and emphasizing the transformative impact of Bayesian methodologies provides valuable insights for clinicians, researchers, and healthcare stakeholders.

Open Access: Yes

DOI: 10.31893/multirev.2025081

Comparative Study on Antioxidant Capacity of Diverse Food Matrices: Applicability, Suitability and Inter-Correlation of Multiple Assays to Assess Polyphenol and Antioxidant Status

Bela E. Toth Tarek Alshaal József Prokisch Sara Mirani Attila Kiss Anna Pál Vivien Anna Papp Attila Kiss

Publication Name: Antioxidants

Publication Date: 2025-03-01

Volume: 14

Issue: 3

Page Range: Unknown

Description:

Antioxidants play a crucial role in mitigating oxidative stress and preventing cellular damage caused by free radicals. This study aimed to compare the effectiveness of three antioxidant assays—DPPH, TEAC, and FRAP—in quantifying the antioxidant capacity of 15 plant-based spices, herbs, and food materials from five distinct plant families. The relationship between these assays and total polyphenol content (TPC) as well as total flavonoid content (TFC) was also investigated. The results showed that FRAP exhibited the strongest correlation with TPC (r = 0.913), followed by TEAC (r = 0.856) and DPPH (r = 0.772). Lamiaceae species, such as rosemary and thyme, consistently demonstrated high antioxidant activities across all assays. The study highlights the complementary nature of these assays in assessing antioxidant capacity and underscores their utility in profiling polyphenol- and flavonoid-rich plants for potential nutritional and therapeutic applications.

Open Access: Yes

DOI: 10.3390/antiox14030317

Exploring the impact of China's low carbon energy technology trade on alleviating energy poverty in Belt and Road Initiative countries

Lubos Smutka Xin Zhao Huangxin Chen James Tumba Henry Abdulkadir Barut Umer Shahzad

Publication Name: Energy

Publication Date: 2025-03-01

Volume: 318

Issue: Unknown

Page Range: Unknown

Description:

The objective of this study is to analyze how low-carbon technology imports such as wind turbines, solar panels, carbon capture equipment, and biomass systems from China affect Belt and Road Initiative (BRI) countries’ energy poverty. Additionally, we analyze the role of financial development, deliberative democracy, economic complexity, human development, and telecommunications infrastructure on energy poverty in BRI countries. We use 69 countries from Belt and Road initiative countries and a sample period from 2000 to 2019. We classify these countries according to the IMF classification of advanced, emerging and low-income developing countries. We employ the instrumental variable generalized method of moments (IV-GMM) approach as the main technique to take care of the endogeneity concerns inherent in the model, as well as a robust quantile-based technique called the method of moments quantile regression estimator (MMQREG). Our results reveal that low-carbon technology trade from China does not significantly alleviate energy poverty in the BRI countries. Financial development increases energy poverty while deliberative democracy decreases it. Economic complexity, as well as human development, negatively affects energy poverty, while telecommunications infrastructure does not affect energy poverty significantly. Based on the results, policy implications are provided.

Open Access: Yes

DOI: 10.1016/j.energy.2025.134604

Evaluation of vibrating sound transducers with glass membrane based on measurements and numerical simulations

György Wersényi

Publication Name: 132nd Audio Engineering Society Convention 2012

Publication Date: 2012-10-22

Volume: Unknown

Issue: Unknown

Page Range: 477-482

Description:

In recent years manufacturers introduced so-called "invisible sound" solutions. In-wall, surface mount or glass mount versions of different vibrating transducers are commercially available. The entire surface becomes a speaker delivering sound and the frequency response is said to be equivalent to conventional diaphragm speakers. Furthermore, the sound is omni directional at nearly all frequencies (60 Hz - 15 kHz) while channel separation is maintained. This paper presents measurement results of the SolidDrive SD1g transducer mounted on different glass surfaces, including vibration measurements and acoustic parameters. Furthermore, based on a numerical FEM-model using COMSOL, comparison between measured and simulated results and estimation of transfer function and directional characteristics are presented.

Open Access: Yes

DOI: DOI not available

Comparison of Five Rehabilitation Interventions for Acute Ischemic Stroke: A Randomized Trial

Tamás Haidegger Tibor Hortobágyi József Tollár Péter Prukner Tomas Vetrovsky Istvan Drotar Szilvia Kóra Petra Kós Zoltán Vadászi György Wersényi

Publication Name: Journal of Clinical Medicine

Publication Date: 2025-03-01

Volume: 14

Issue: 5

Page Range: Unknown

Description:

Background: Comparative efficacy of rehabilitation interventions in persons with acute ischemic stroke (PwS) is limited. This randomized trial assessed the immediate and lasting effects of five interventions on clinical and mobility outcomes in 75 PwS. Methods: Five days after stroke, 75 PwS were randomized into five groups: physical therapy (CON, standard care, once daily); walking with a soft robotic exoskeleton (ROB, once daily); agility exergaming once (EXE1, once daily) or twice daily (EXE2, twice daily); and combined EXE1+ROB in two daily sessions. Interventions were performed 5 days per week for 3 weeks. Outcomes were assessed at baseline, post-intervention, and after 5 weeks of detraining. Results: Modified Rankin Scale (primary outcome) and Barthel Index showed no changes. EXE1, EXE2, ROB, and EXE1+ROB outperformed standard care (CON) in five secondary outcomes (Berg balance scale, 10m walking speed, 6-min walk test with/without robot, standing balance), with effects sustained after 5 weeks. Dose effects (EXE1 vs. EXE2) were minimal, while EXE1+ROB showed additive effects in 6-min walk tests. Conclusions: These novel comparative data expand evidence-based options for therapists to design individualized rehabilitation plans for PwS. Further confirmation is needed.

Open Access: Yes

DOI: 10.3390/jcm14051648