bluuebunny/crossref_metadata_2025_split huggingface dataset:
Magnetized Einstein–Maxwell-dilaton model under an external electric field
Authors: Shahkarami Leila 
Published: January 2022

AbstractWe employ an analytic solution of a magnetized Einstein–Maxwell-dilaton gravity model whose parameters have been determined so that its holographic dual has the most similarity to the confining QCD-like theories. Analyzing the total potential of a quark–antiquark pair, we are able to investigate the effect of an electric field on different phases of the background which are the thermal AdS and black hole phases. This is helpful for better understanding of the confining character and the phases of the system. We find out that the field theory dual to the black hole solution is always deconfined, as expected. However, although the thermal AdS phase generally describes the confining phase, for quark pairs parallel to B (longitudinal case) with $$B>B_{\mathrm {critical}}$$

B
>

B
critical

the response of the system mimics the deconfinement, since there is no IR wall in the bulk and the critical field $$E_s=0$$

E
s

=
0

, as is the case for the deconfined phase. We moreover observe that in the black hole phase with sufficiently small values of $$\mu $$
μ
and in the thermal AdS phase, for both longitudinal and transverse cases, the magnetic field enhances the Schwinger effect, which can be termed as the inverse magnetic catalysis (IMC). This is deduced both from the decrease of critical electric fields and decreasing the height and width of the total potential barrier the quarks are facing with. However, by increasing $$\mu $$
μ
to higher values, IMC turns into magnetic catalysis, as also observed from the diagram of the Hawking–Page phase transition temperature versus B for the background geometry.
Comparison of perturbative and non-perturbative methods in f(R) gravity
Authors: Nobleson K. , Ali Amna , Banik Sarmistha 
Published: January 2022

AbstractIn this work, we investigate the structure and properties of neutron stars in $$R^2$$

R
2

gravity using two approaches, viz: the perturbative and non-perturbative methods. For this purpose, we consider NS with several nucleonic, as well as strange EoS generated in the framework of relativistic mean field models. The strange particles in the core of NS are in the form of $$\Lambda $$
Λ
hyperons and quarks, in addition to the nucleons and leptons. In both the approaches, we obtain mass–radius relation for a wide range of values of the extra degree of freedom parameter a arising due to modification of gravity at large scales. The mass–radius relation of the chosen equation of states lies well within the observational limit in the case of GR. We identify the changes in the property of neutron star in the background of f(R) gravity, and compare the results in both the methods. We also identify the best suited method to study the modified gravity using the astrophysical observations.
Anisotropic stellar model of neutron stars in f(T) gravity with off-diagonal tetrad
Authors: Solanki Jay , Said Jackson Levi 
Published: January 2022

AbstractIn this paper, we develop a new class of analytical solutions describing anisotropic stellar structures of observed neutron stars using modified f(T) gravity. We use the off-diagonal tetrad that is best suitable for studying spherically symmetric objects in f(T) gravity. We develop exact solutions in the quadratic model of f(T) gravity by introducing physically reliable metric potentials that can describe a wide range of astrophysical systems. We then apply the model to investigate the stellar structures of four observed compact stars, 4U 1538-52, J0437-4715, J0030+0451, and 4U 1820-30. We calculate the values of model parameters for the stellar objects under examination in this paper. Comprehensive graphical analysis shows that the model describing anisotropic stellar structures is physically acceptable, causal, and stable. The model inherently exhibits the quadratic equation of state that can be utilized to investigate the material composition and stellar structures of the observed compact stars.
A Context-Aware Architecture for Realizing Business Process Adaptation Strategies Using Fuzzy Planning
Authors: Kord Toudeshki Leila , Seyyedi Mir Ali , Salajegheh Afshin 
Published: January 2022

Business competency emerges in flexibility and reliability of services that an enterprise provides. To reach that, executing business processes on a context-aware business process management suite which is equipped with monitoring, modeling and adaptation mechanisms and smart enough to react properly using adaptation strategies at runtime, are a major requisite. In this paper, a context-aware architecture is described to bring adaptation to common business process execution software. The architecture comes with the how-to-apply methodology and is established based on process standards like business process modeling notation (BPMN), business process execution language (BPEL), etc. It follows MAPE-K adaptation cycle in which the knowledge, specifically contextual information and their related semantic rules — as the input of adaptation unit — is modeled in our innovative context ontology, which is also extensible for domain-specific purposes. Furthermore, to support separation of concerns, we took apart event-driven adaptation requirements from process instances; these requirements are triggered based on ontology reasoning. Also, the architecture supports fuzzy-based planning and extensible adaptation realization mechanisms to face new or changing situations adequately. We characterized our work in comparison with related studies based on five key adaptation metrics and also evaluated it using an online learning management system case study.
k-Efficient domination: Algorithmic perspective
Authors: Meybodi Mohsen Alambardar 
Published: January 2022

A set [Formula: see text] of a graph [Formula: see text] is called an efficient dominating set of [Formula: see text] if every vertex [Formula: see text] has exactly one neighbor in [Formula: see text], in other words, the vertex set [Formula: see text] is partitioned to some circles with radius one such that the vertices in [Formula: see text] are the centers of partitions. A generalization of this concept, introduced by Chellali et al. [k-Efficient partitions of graphs, Commun. Comb. Optim. 4 (2019) 109–122], is called [Formula: see text]-efficient dominating set that briefly partitions the vertices of graph with different radiuses. It leads to a partition set [Formula: see text] such that each [Formula: see text] consists a center vertex [Formula: see text] and all the vertices in distance [Formula: see text], where [Formula: see text]. In other words, there exist the dominators with various dominating powers. The problem of finding minimum set [Formula: see text] is called the minimum [Formula: see text]-efficient domination problem. Given a positive integer [Formula: see text] and a graph [Formula: see text], the [Formula: see text]-efficient Domination Decision problem is to decide whether [Formula: see text] has a [Formula: see text]-efficient dominating set of cardinality at most [Formula: see text]. The [Formula: see text]-efficient Domination Decision problem is known to be NP-complete even for bipartite graphs [M. Chellali, T. W. Haynes and S. Hedetniemi, k-Efficient partitions of graphs, Commun. Comb. Optim. 4 (2019) 109–122]. Clearly, every graph has a [Formula: see text]-efficient dominating set but it is not correct for efficient dominating set. In this paper, we study the following: [Formula: see text]-efficient domination problem set is NP-complete even in chordal graphs. A polynomial-time algorithm for [Formula: see text]-efficient domination in trees. [Formula: see text]-efficient domination on sparse graphs from the parametrized complexity perspective. In particular, we show that it is [Formula: see text]-hard on d-degenerate graphs while the original dominating set has Fixed Parameter Tractable (FPT) algorithm on d-degenerate graphs. [Formula: see text]-efficient domination on nowhere-dense graphs is FPT.
InPhase: Phase-based Ranging and Localization
Authors: Schröder Yannic , Wolf Lars 
Published: January 2022

Ranging and subsequent localization have become more and more critical in today’s factories and logistics. Tracking goods precisely enables just-in-time manufacturing processes. We present the InPhase system for ranging and localization applications. It employs narrowband 2.4 GHz IEEE 802.15.4 radio transceivers to acquire the radio channel’s phase response. In comparison, most other systems employ time-of-flight schemes with Ultra Wideband transceivers. Our software can be used with existing wireless sensor network hardware, providing ranging and localization for existing devices at no extra cost. The introduced Complex-valued Distance Estimation algorithm evaluates the phase response to compute the distance between two radio devices. We achieve high ranging accuracy and precision with a mean absolute error of 0.149 m and a standard deviation of 0.104 m. We show that our algorithm is resilient against noise and burst errors from the phase-data acquisition. Further, we present a localization algorithm based on a particle filter implementation. It achieves a mean absolute error of 0.95 m in a realistic 3D live tracking scenario.
Distraction Osteogenesis of Severely Resorbed Mandible
Authors: Sakka Salah , Al Rafedah Ali , Alqhtani Nasser , Alenazi Adel 
Published: January 2022

Edentulous patients require an adequate rehabilitation so that the alveolar ridge in the interforaminal region be restored for subsequent implant-supported overdentures. The ultimate goal of distraction is to reconstruct the alveolar ridge to a suitable height and width compatible with Atwood class 2 in an appropriate direction allowing the sagittal interalveolar relation to be normally restored. Methods. A 65-year-old man presented with a grade 4 Mandibular atrophy as per Atwood classification which resulted in unsatisfactory treatment with full dentures. Endo-Distractor Krenkel® device was used for anterior mandibular vertical distraction osteogenesis. Four mandibular implants (ITI Straumann, Basel, Switzerland) measuring diameter

Ø
=
4.1

mm and length

L
=
16

mm were inserted after the required retention period. Standardized prosthetic treatment was completed with titanium bar retained over dentures. Results. A distraction of 11 mm was achieved within 18 days followed by a retention period of 4 months. No signs of infection nor distractor anchorage loosening were detected, and minimal lingual tilting has occurred. Conclusion. Distraction is possible on severely atrophic mandibles. The quality of bone reconstruction is satisfactory for both functional and esthetic results.
Tourist Attractions Visitor Density Monitoring Platform
Authors: Rosyida Novita , Atmoko Rachmad Andri , Handoko Galih Panji , Widia I Dewa Made , Asriningtyas Salnan Ratih 
Published: January 2022

Tourism is one of the sectors that have been hit hard during the current Covid-19 pandemic. However, in 2021 the tourism sector is slowly rising marked by the number of tourist attractions that are starting to open to the public with the implementation of strict health protocols. However, in practice there are still many cases of violations of health protocols in various tourist attractions, ranging from the undisciplined use of masks, not keeping a distance (social distancing), and the absence of setting the ideal number of visitors during a pandemic like the current one. Managers of tourist attractions tend to ignore restrictions on the number of visitors due to the absence of an management system to run. There needs to be an application that can inform the condition of visitors to tourist attractions in real-time so that people have self-awareness of their personal health so that people can make early plans before traveling. In good governance, this application contributes to controlling the risk of Covid-19 transmission originating from crowded centers (tourist spots). The government can easily monitor the distribution of tourist visitor density in the area so that it can then be used as a basis for carrying out policies and handling in the field.
This study proposes the development of an application platform (software and hardware) monitoring the density of visitors to tourist attractions using the concept of object detection based on image processing and deep learning. The integration of hardware with web-based software will provide information on the density of visitors to tourist attractions that are easily accessible to the public so that they are expected to contribute to the handling of the current Covid-19 pandemic.
The Progress of Speech Production in People with Autism (Case Study on a Girl Named Aliya Salsabila Ramadhani)
Authors: Mubasyira Mu’thia , Rafli Zainal , Boeriswati Endry 
Published: January 2022

This study is titled the progress of speech production in people with autism (case study in a girl named Aliya Salsabila Ramadhani). The study was conducted by Mu'thia Mubasyira, Zainal Rafli and Endry Boeriswati. To correspond the email used is muthiamubasyira_9906921003@mhs.unj.ac.id and the orchid number is 0000-0002-4084-3382. This study was conducted with the aim to find out how the progress of speech production in people with autism with the object of research on a girl named Aliya Salsabila Ramadhani who is now 9 years old. This study tried to analyze the primary data obtained by explaining the progress of language and Aliya speech production from the age of 3 months old until now. This research uses descriptive qualitative methods that seek to describe the progress of Aliya language and speech production with a short narrative and exposure to data retrieval techniques used through observation of video documentation of activities carried out and through questionnaires and interviews. In addition, this study also uses relevant references as study materials so that holistic and thorough discussion results are obtained. From the characteristics that seem to be known that Aliya is classified as experiencing mild austism. It is also obtained through the analysis of language development and how Aliya interacts with the environment and the surrounding people. Aliya also has abstinence from certain foods to suppress so that her behavior is not too hyper or excessive. Aliya's language progress and speech production made significant increasement after she received developmental therapy and speech therapy and attended a special needs school. This research is expected to add to the treasures of science, especially those related to psycholinguistics with the study of language development and speech production in people with autism.
The increasing of Human Resources quality Through Food Security in Semarang City (A Study of Legal Anthropology)
Authors: Handayani Emy , Wicaksono Satrio Adi 
Published: January 2022

Development of food security has a strategic meaning in development in an area through its human resources, in accordance with Constitution number 18 of 2012 concerning food, that the provincial, district / city and / or village governments determine the type and amount of certain food reserves according to the consumption needs of the local community. The Human Development Index (HDI) also states that three factors determine the Human Development Index, namely education, health, and economy, so the quality of human resources is very influential and has an important role in developing and managing food so that a synergistic relationship between various aspects of the food security development in a region is needed.

In this study, improving the quality of human resources in the city of Semarang in terms of the Anthropological Study of Law on food security, the method used through a normative juridical approach that is the law conceptualized as a normative symptom in legislation with the legal anthropological approach, the population in this study is the Department of Agriculture Semarang City with samples of food products in improving the quality of its human resources

The results of this study comes through the Empirical Legal Anthropology approach, the support of strong and effective food institutions can spur growth, development and improvement of food, the nutritional status improvement of the community is very influential in improving the quality of human resources in increasing intelligence and the performance of human resources in determining future growth as one of strengthening local food security in the city of Semarang. With the availability of high quality human resources characterized by a strong physical, strong mental, excellent health and mastering science and technology can support the development of the city of Semarang.
A Case Study on the Sri Lankan English Language Learner in the field of Creative Arts
Authors: Niroshani B.A.Ajantha 
Published: January 2022

This article reports the findings of a study that investigated the attitudes of creative arts undergraduates and the attitudes and perception of English as a second language (ESL) teachers from different faculties in three Sri Lankan universities about the motivation and proficiency of their students. Employing a qualitative approach in which a 20-item 6- point Likert scale questionnaire and eight (8) item online questionnaire served as the instuments respectively for randomly selected 25 students and the 10 ESL teachers. The results of the study revealed that the undergraduates were aware of the role played by the English language in terms of the potential utility,importance of learning and the potential impact on their future employment.According to the data analysis,the undergraduates in the faculties of medicine and science are motivated than their counterparts in the faculty of creative arts.Differenciations were observerd in terms of independent thinking, enthusiasm for classroom tasks and critical thinking between the same.
Novel Risk Model to Predict Emergency Department Associated Mortality for Patients Supported With a Ventricular Assist Device: The Emergency Department–Ventricular Assist Device Risk Score
Authors: Edelson Jonathan B. , Edwards Jonathan J. , Katcoff Hannah , Mondal Antara , Chen Feiyan , Reza Nosheen , Hanff Thomas C. , Griffis Heather , Mazurek Jeremy A. , Wald Joyce , Burstein Danielle S. , Atluri Pavan , O’Connor Matthew J. , Goldberg Lee R. , Zamani Payman , Groeneveld Peter W. , Rossano Joseph W. , Lin Kimberly Y. , Birati Edo Y. 
Published: January 2022

Background
The past decade has seen tremendous growth in patients with ambulatory ventricular assist devices. We sought to identify patients that present to the emergency department (ED) at the highest risk of death.

Methods and Results
This retrospective analysis of ED encounters from the Nationwide Emergency Department Sample includes 2010 to 2017. Using a random sampling of patient encounters, 80% were assigned to development and 20% to validation cohorts. A risk model was derived from independent predictors of mortality. Each patient encounter was assigned to 1 of 3 groups based on risk score.
A total of 44 042 ED ventricular assist device patient encounters were included. The majority of patients were male (73.6%), <65 years old (60.1%), and 29% presented with bleeding, stroke, or device complication. Independent predictors of mortality during the ED visit or subsequent admission included age ≥65 years (odds ratio [OR], 1.8; 95% CI, 1.3–4.6), primary diagnoses (stroke [OR, 19.4; 95% CI, 13.1–28.8], device complication [OR, 10.1; 95% CI, 6.5–16.7], cardiac [OR, 4.0; 95% CI, 2.7–6.1], infection [OR, 5.8; 95% CI, 3.5–8.9]), and blood transfusion (OR, 2.6; 95% CI, 1.8–4.0), whereas history of hypertension was protective (OR, 0.69; 95% CI, 0.5–0.9). The risk score predicted mortality areas under the curve of 0.78 and 0.71 for development and validation. Encounters in the highest risk score strata had a 16‐fold higher mortality compared with the lowest risk group (15.8% versus 1.0%).

Conclusions
We present a novel risk score and its validation for predicting mortality of patients with ED ventricular assist devices, a high‐risk, and growing, population.
Prognostic Value of T1 Mapping and Feature Tracking by Cardiac Magnetic Resonance in Patients With Signs and Symptoms Suspecting Heart Failure and No Clinical Evidence of Coronary Artery Disease
Authors: Seno Ayako , Antiochos Panagiotis , Lichtenfeld Helena , Rickers Eva , Qamar Iqra , Ge Yin , Blankstein Ron , Steigner Michael , Aghayev Ayaz , Jerosch‐Herold Michael , Kwong Raymond Y. 
Published: January 2022

Background
The ability of left ventricular ejection fraction (LVEF) and late gadolinium enhancement (LGE) by cardiac magnetic resonance for risk stratification in suspected heart failure is limited. We aimed to evaluate the incremental prognostic value of cardiac magnetic resonance‐assessed extracellular volume fraction (ECV) and global longitudinal strain (GLS) in patients with signs and symptoms suspecting heart failure and no clinical evidence of coronary artery disease.

Methods and Results

A total of 474 consecutive patients (57±21 years of age, 56% men) with heart failure‐related symptoms and absence of coronary artery disease underwent cardiac magnetic resonance. After median follow‐up of 18 months, 59 (12%) experienced the outcome of all‐cause death or heart failure hospitalization (DeathCHF). In univariate analysis, cardiac magnetic resonance‐assessed LVEF, LGE, GLS, and ECV were all significantly associated with DeathCHF. Adjusted for a multivariable baseline model including age, sex, LVEF and LGE, ECV, and GLS separately maintained a significant association with DeathCHF (ECV, hazard ratio [HR], 1.44 per 1 SD increase; 95% CI 1.13–1.84;
P
=0.003, and GLS, HR, 1.78 per 1 SD increase; 95% CI, 1.06–2.96;
P
=0.028 respectively). Adding both GLS and ECV to the baseline model significantly improved model discrimination (C statistic from 0.749 to 0.782,
P
=0.017) and risk reclassification (integrated discrimination improvement 0.046 [0.015–0.076],
P
=0.003; continuous net reclassification improvement 0.378 [0.065–0.752],
P
<0.001) for DeathCHF, beyond LVEF and LGE.

Conclusions
In patients with signs and symptoms suspecting heart failure and no clinical evidence of coronary artery disease, joint assessment of GLS and ECV provides incremental prognostic value for DeathCHF, independent of LVEF and LGE.