bluuebunny/crossref_metadata_2025_split huggingface dataset:
Indoor Objects Detection and Recognition for Mobility Assistance of Visually Impaired People with Smart Application
Authors: Megavath Ravinder , Indra Gaurav , Al-Rasheed Amal , Alqahtani Mohammed S. , Abbas Mohamed , Almohiy Hussain M. , Jambi Layal K. , Soufiene Ben Othman 
Published: April 2023

Abstract

Visually impaired people are individuals who have a partial or complete loss of vision. This condition can vary in severity, from mild to profound, and can be caused by a variety of factors, including genetics, injury, illness, or aging. It's important to note that visually impaired people are a diverse group with different needs and abilities, and they should be treated with respect and given equal access to opportunities and resources. Smart applications can be extremely helpful for visually impaired people by providing them with information and assistance in navigating their environment. Moreover, can greatly enhance the independence and quality of life for visually impaired people. Many applications have been proposed with individual features set and other concerns due to are expensive, difficult to use, less affordable, less accessible and are an overhead while travelling. To solving these issues, in this paper we design an android Application - Smart Vision (SV) to aid the Visually Impaired people in every possible realm of daily pursuits like for their diurnal regressions around the house/office place, taking notes of their daily affairs, recognizing the people around, identifying the colours etc. Smart Vision would enable the visually impaired to have a better user experience as the whole working of the application is divided into 6 modules - Obstacle Avoidance and Navigation Module, Digital Assistant Module, Scene Description Module, Light Detection Module, Colour Detection Module and Face Detection Module, which can be easily selected by giving a single voice command. Smart Vision is exclusively designed by keeping the memory and battery constraints of the application within permissible limits ensuring the reliability, portability and cost effectiveness to the grieved end user to make life beautiful for them. Smart Vision enables detection of the desired object with a 90% accuracy, face recognition with an accuracy of 87%, colour detection with an approximate accuracy of 75%, Digital assistant module accuracy as 91% and light detection (for light and dark intensities) minimum accuracy is 82%. It has been interpreted that the Average Response Time is under 3 seconds which makes it a high-speed device because the Raspberry pi is used for connecting the components which reduces the transit time. Finally, a comparative study has been done with the existing topologies and it is so found that the Smart Vision is applicable for both indoor and outdoor environments.
A Lagrangian analysis of combustion regimes using multi-modal turbulent combustion model
Authors: Angelilli Lorenzo , Ciottoli Pietro Paolo , Hernandez-Perez Francisco E. , Valorani Mauro , Mueller Micheal E. , Im Hong G. 
Published: April 2023

Abstract

High Reynolds number turbulent reacting flows poses a modeling challenge due to the multi-regime, mixed-mode nature of the combustion processes. The present study attempts to provide insights into the complex combustion characteristics in turbulent flames by conducting highly resolved large eddy simulations of the Darmstadt multi-regime burner exhibiting both premixed and nonpremixed combustion regimes with occurrences of local extinction and re-ignition. Massless Lagrangian particles are transported along with the flow in order to monitor the evolution of the local flow-chemistry interaction. The simulations are validated against experimental data, and the Lagrangian properties are compared against the traditional premixed model in progress variable space and a generalized multi-modal manifold model in mixture fraction and generalized progress variable space. The comparison reveals that minor radical species are sensitive to the generalized progress variable dissipation rates, and the multi-modal manifold model is more suitable to reproduce the complex flame structure. Using the multi-modal model framework, the evolution of the combustion regimes is analyzed by the slope of the Lagrangian particle trajectory in the phase space.
Mealtime Interactions between Nursing Home Staff and Residents with Dementia: A Behavioral Analysis of Language Characteristics
Authors: Liu Wen , Jao Ying-Ling , Paudel Anju , Yoon Si On 
Published: April 2023

Abstract
Background. Quality staff-resident communication is crucial to promote outcomes in nursing home residents with dementia requiring assistance during mealtimes. Better understanding of staff-resident language characteristics in mealtime interactions help promote effective communication, yet evidence is limited. This study aimed to examine factors associated with language characteristics in staff-resident mealtime interactions.Methods. This was a secondary analysis of 160 mealtime videos involving 36 staff and 27 residents with dementia (53 unique staff-resident dyads) in 9 nursing homes. We examined the associations of speaker (resident vs. staff), utterance quality (negative vs. positive), intervention (pre- vs. post-communication intervention), and resident dementia stage and comorbidities with expression length (number of words in each utterance) and addressing partner by name (whether staff or resident named their partner in each utterance), respectively.Results. Staff (utterance n = 2990, 99.1% positive, mean = 4.3 words per utterance) predominated conversations and had more positive, longer utterances than residents (utterance n = 890, 86.7% positive, mean = 2.6 words per utterance). As residents progressed from moderately-severe to severe dementia, both residents and staff produced shorter utterances (z=-2.66, p = .009). Staff (18%) named residents more often than residents (2.0%; z = 8.14, p < .0001) and when assisting residents with more severe dementia (z = 2.65, p = .008).Conclusions. Staff-resident communication was primarily positive, staff-initiated, and resident-oriented. Utterance quality and dementia stage were associated with staff-resident language characteristics. Staff play a critical role in mealtime care communication and should continue to initiate resident-oriented interactions using simple, short expressions to accommodate resident declining language abilities, particularly those with severe dementia. Staff should practice addressing residents by their names more frequently to promote individualized, targeted, person-centered mealtime care. Future work may further examine staff-resident language characteristics at word and other levels using more diverse samples.
Mechanism and surrounding rock control of gob-side entry formation passing through normal fault - A case study
Authors: Yang Jun , Fu Qiang , Gao Yubing , Li Changjiang , Chang Xu , Wu Xing 
Published: April 2023

Abstract
Geological faults are widely distributed in stratum and have an important influence on underground mining. In order to increase the mining rate of coal resources and reduce the occurrence of accidents such as rock bursts, the technology of gob-side entry formed by roof cutting and pressure release (GEFRCPR) was investigated in fault-affected areas. The mechanism of gob-side entry formation passing through a normal fault was studied by theoretical analysis and numerical simulation, and control technology for entry formation was proposed. The results indicate that during the process of passing through a normal fault from hanging wall to foot wall, the vertical stress of the solid coal bank at the working face increased first, then decreased, rose and eventually reached a stable state. For the fault affected area, a combined support of " door type supports + cutting guard stents " was proposed as a temporary support for the formed entry and was tested on site. On-site monitoring showed that the degree of final deformation of surrounding rock of the formed entry was like: at the fault > before the fault > after the fault. By applying the proposed support technology, the deformation of the surrounding rock in the fault-affected area was effectively controlled so that the formed roadway appeared thereafter can be reused.
The Quality of Migrant Patients’ Primary Healthcare Experiences and Patient-Centered Medical Home Achievement by Community Health Centers: Results from the China Greater Bay Area Study
Authors: Huo Yongjun , Kang Xun , Zhong Chenyang , Shi Leiyu , Liu Ruqing , Hu Ruwei 
Published: April 2023

Abstract
Background: In China, Community Health Centers (CHCs) provide PHC; however, few studies have examined the quality of primary healthcare (PHC) services experienced by migrant patients. We examined the potential association between the quality of migrant patients’ PHC experiences and the achievement of Patient-Centered Medical Home by CHCs in China.Methods: Between August 2019 and September 2021, 482 migrant patients were recruited from ten CHCs in China’s Greater Bay Area. We evaluated CHC service quality using the National Committee for Quality Assurance Patient-Centered Medical Home (NCQA-PCMH) questionnaire. We additionally assessed the quality of migrant patients’ PHC experiences using the Primary Care Assessment Tools (PCAT). General linear models (GLM) were used to examine the association between the quality of migrant patients’ PHC experiences and the achievement of PCMH by CHCs, adjusting for covariates.Results: The recruited CHCs performed poorly on PCMH1, Patient-Centered Access (7.2 ± 2.0), and PCMH2, Team-Based Care (7.4 ± 2.5). Similarly, migrant patients assigned low scores to PCAT dimension C—First-contact care—which assesses access (2.98 ± 0.03), and D—Ongoing care (2.89 ± 0.03). On the other hand, higher-quality CHCs were significantly associated with higher total and dimensional PCAT scores, except for dimensions B and J. For example, the total PCAT score increased by 0.11 (95% CI: 0.07–0.16) with each increase of CHC PCMH level. We additionally identified associations between older migrant patients (> 60 years) and total PCAT and dimension scores, except for dimension E. For instance, the average PCAT score for dimension C among older migrant patients increased by 0.42 (95% CI: 0.27–0.57) with each increase of CHC PCMH level. Among younger migrant patients, this dimension only increased by 0.09 (95% CI: 0.03–0.16).Conclusion: Migrant patients treated at higher-quality CHCs reported better PHC experiences. All observed associations were stronger for older migrants. Our results may inform future healthcare quality improvement studies that focus on the PHC service needs of migrant patients.
Multiplicity of Solutions for Variable-order Fractional Kirchhoff Problem With Singular Term
Authors: Chammem Rym , Sahbani Abdelhakim , Saidani Anouar 
Published: April 2023

Abstract
In this paper, we consider a class of singular variable-order fractional Kirchhoff problem of the form:
[u]_{s(.)}^{2(\sigma-1)}(-\Delta)^{s(.)}u =\lambda~~\frac{ a(x)}{|u|^{m (x)}}+b(x)|u|^{q(x)-2}u in Omega,
u=0, on R^{n} \Omega,
where Omega is a bounded domain, (-\Delta)^{s(.)} is the variable-order fractional Laplacian operator, [u]_{s(.)} is the Gagliardo
seminorm and s(.,.) in C(R^{N}x{R}^{N} ,(0, 1)) and symetric function. We assume that lambda is a non-negative parameter ,
sigma >= 1, m,q in C(Omega) with 0<1<2\sigma<\frac{2N}{N-2s(x,x)} and N>2s(x,y) for all (x,y) in Omega x Omega).
We combine some variational techniques with a truncation argument in order to show the existence and the multiplicity of positive solutions to the above problem.
Water content-based electrical properties tomography: results from a retrospective clinical study
Authors: Mandija Stefano , Jacobs Sarah M. , Kleinloog Jordi P.D. , Liu Hongyan , Heide Oscar van der , Kolk Anja G. , Sbrizzi Alessandro , Berg Cornelis A.T. van den 
Published: April 2023

Abstract
Tissue electrical properties (EPs: conductivity and relative permittivity) maps can be reconstructed from water content maps using an empirical model calibrated by fitting literature water content to literature EPs values (wEPT). Results on phantoms and brains for a few healthy volunteers demonstrated high quality EPs maps. Here, we investigate whether wEPT reconstructions calibrated using water content values from healthy volunteers can provide high quality EPs maps in neurological patients and realistic EPs values in normal-appearing/pathological tissue. wEPT reconstructions were performed on ten healthy volunteers, six primary brain tumor, and nine multiple sclerosis (MS) patients using water content maps derived from T1 maps acquired on a 3T MRI system. EPs values in healthy volunteers white and gray matter and cerebrospinal fluid were computed and compared to the values in the normal-appearing tissue of patients. Mean tumor EPs values were computed to investigate possible relations with tumor grade. Mean EPs values in MS lesions were computed to investigate variations between normal-appearing white matter and MS lesions. wEPT EPs maps in volunteers and patients showed similar high quality, with a good pathology to normal-appearing tissue contrast in patients. For diffuse glioma, a positive trend between tumor grade and EPs values was observed. For MS lesions, a clear increase in the measured EPs values was observed compared to white matter. This work demonstrates that wEPT EPs reconstructions calibrated using healthy volunteers mean water content values provide high quality EPs maps and image contrast between normal-appearing/pathological tissue indicating their potential as imaging biomarkers.
Comparative analysis of deeply phenotyped GBM cohorts of ‘short-term’ and ‘long-term’ survivors
Authors: Biswas Archita , Salvucci Manuela , Connor Kate , Düssmann Heiko , Carberry Steven , Fichtner Michael , King Ellen , Murphy Brona , O’Farrell A.C , Cryan Jane , Beausang Alan , Heffernan Josephine , Cremona Mattia , Hennessy Bryan T. , Clerkin James , Sweeney Kieron J. , MacNally Steve , Brett F , O’Halloran P , Bacon Orna , Furney Simon , Verreault Maite , Quissac Emie , Bielle Franck , Ahmed Mohammed H , Idbaih Ahmed , Leenstra Sieger , Ntafoulis Ioannis , Fabro Federica , Lamfers Martine , Golebiewska Anna , Hertel Frank , Niclou Simone P , Yen Romain Tching Chi , Kremer Andreas , Dilcan Gonca , Lodi Francesca , Arijs Ingrid , Lambrechts Diether , P Manasa Kalya , Kel Alexander , Byrne Annette T , Prehn Jochen H.M 
Published: April 2023

Abstract
Glioblastoma (GBM) is an aggressive brain cancer that typically results in death in the first 15 months after diagnosis. There have been limited advances in finding new treatments for GBM. In this study, we investigated molecular differences between patients with extremely short (≤9 months, Short term survivors, STS) and long survival (≥36 months, Long term survivors, LTS). Patients were selected from an in-house cohort (GLIOTRAIN-cohort), using defined inclusion criteria (Karnofsky score >70; age <70 years old; Stupp protocol as first line treatment, IDH wild type), and a multi-omic analysis of LTS and STS GBM samples was performed. Transcriptomic analysis of tumour samples identified cilium gene signatures enriched in LTSs. Immunohistochemical analysis confirmed the presence of cilia in the tumours of LTSs. Notably, reverse phase protein array analysis (RPPA) demonstrated increased phosphorylated GAB1 (Y627), SRC (Y527), BCL2 (S70) and RAF (S338) protein expression in STS compared to LTS. We identified 25 unique master regulators (MR) and 13 transcription factors (TFs) belonging to ontologies of integrin signalling and cell cycle to be upregulated in STS. These data deliver new potential biomarkers and therapeutic targets for the management of GBM.
Upcycling Recycled Epoxy-Based Vitrimer for Enhancing Toughness of Poly(ethylene terephthalate)
Authors: Chen Chin-Wen , Mao Hsu-I , Lee Hong-Kuan , Chou Jui-Yang , Rwei Syang-Peng 
Published: April 2023

Abstract
This article reports a potential high-value reuse pathway for a depolymerized vitrimer matrix from abandoned composites. A series of polyethylene terephthalate (PET)-based copolymers containing various amounts of added vitrimer as the toughness modifier were synthesized by melt polymerization. The thermal, mechanical, and crystallization behaviors of the synthesized copolymers were determined, indicating all samples presented excellent thermal stability at Td−5% above 390 ℃. The differential scanning calorimetry and wide-angle X-ray scattering diffraction results demonstrated that the copolymers maintained the crystallization characteristics of normal PET, while a slight reduction in the crystallizability was observed upon the incorporation of the vitrimer. Moreover, the mechanical behaviors of the copolymers were investigated systematically. Surprisingly, a significant increment was observed in the elongation rate from 11.1 to 804.2% when the added vitrimer content increased from 0 to 0.25 wt%, and this trend decreased slightly as the vitrimer content increased further. Impact strength examinations revealed twofold enhancement as the vitrimer concentration increased from 0 to 0.25 wt%, with further improvement as the content was increased. The shore D hardness test illustrated that all samples showed comparable values at around 80, suggesting that introducing the vitrimer does not decrease the hardness of the PET-based copolymers.
Strength and Durability Assessment of Low Water Absorption Glasscrete Blocks for Zero-Spalling Effect in Buildings
Authors: DOTUN ATOYEBI OLUMOYEWA , O. Odeyemi S. , B. Ndubuisi 
Published: April 2023

Abstract
Glass waste produced around the world is disposed of carefreely, creating huge piles in landfills and increasing environmental pollution because it is non-biodegradable. This study was conducted to assess the strength and durability of waste glass as a partial replacement for a mortal mix of sharp sand and stone dust. The glasscrete block samples were produced in a 6” metal block mould with 0%, 25% and 50% partial replacement of stone dust and sharp sand respectively. The compressive strength and water absorption tests were conducted after the samples were cured for 7, 28 and 56 days in a laboratory. The highest compressive strengths of 102.333kN and 100.667kN were observed in 50% waste glass partial replacement with sharp sand and 50% waste glass combination with 25% sharp sand and 25% stone dust respectively. The least compressive strength was seen in the control samples of sand and stone dust with no replacement of waste glass. This shows that the addition of waste glass increased the compressive strength of the block samples. The least rate of water absorption was recorded in 50% waste glass, 25% sharp sand and 25% stone dust. It should be noted that the replacement of the waste glass with stone dust performed poorly unlike that of sharp sand. Therefore, it is recommended that 50% waste glass, 25% sharp sand and 25% stone dust should be adopted for the production of glasscrete blocks for a zero-spalling effect in buildings with varying mix ratios. Glasscrete blocks can therefore be used in the waterlogged environment and areas prone to the spalling condition.
Analytical Solution for Contact and Crack Problem in Homogeneous Half Plane
Authors: ÜSTÜN AYHAN 
Published: April 2023

Abstract
In this study, the contact and crack problem of an elastic homogeneous half-infinite plane is investigated according to the elasticity theory. There are two rigid blocks on the half-endless plane and the P and Q loads are transferred to the half-infinite plane by these blocks. The effect of the mass forces is not included, the stress and displacement expressions to be used for the contact problem are obtained by using Navier equations and Fourier integral transformation technique, and the boundary conditions determined for the problem are applied. The equations to be used for the crack problem are specified and the boundary conditions for the crack are applied to these equations. The problem is reduced to an integral equation system consisting of four singular integral equations where contact stresses and crack displacements are unknown. Numerical solution of the integral equation system has been realized by using Jacobi polynomials. Numerical results on sub-block stress distributions and stress intensity factors were obtained for different loading conditions, geometric sizes and presented by graphics.
Investments in Agricultural Innovation and Food Security in Sub-Saharan Africa
Authors: Malec Karel , Rojík Stanislav , Maitah Mansoor , Abdu Musa , Abdullahi Kamal Tasiu 
Published: April 2023

Abstract

Empirical evidence proves that agricultural R&D expenditure and researchers attract high returns though the investments have long-gestation periods. Nonetheless, sub-Saharan Africa (SSA) invests meanly in agricultural R&D and researchers. This study explores the impacts of agricultural R&D expenditures and researchers on food security in the region and across the sub-regions. The study applies Bootstrapped LSDV and two-step system GMM techniques to analyze the data on 23–24 SSA countries over the period 2000–2016. Our findings show that investments in agricultural innovation substantially increase food accessibility, availability, and utilization through food productivity growth. Indeed, the investments are more effective in enhancing food utilization than in boosting food availability and accessibility. The findings also reveal that the investments are effective in enhancing food security at least in Southern and Western African sub-regions while they instead exacerbate the problem of food insecurity in Central Africa. The policy implications are adequate resources should be channeled into proper agricultural research and development to introduce new crop varieties or significantly improved crops, etc. There should also be coordination between large and small countries in investments so that the countries can benefit from economies of scale.
JEL Codes: A19, Q19, Q18, Q16, I23
Triangulating Moderate Impact of Social Media Marketing Communication Between Performance Expectancy, Effort Expectancy and Social Influence on Business Performance in Cashew Industry in Sri Lanka
Authors: Kaluarachchi Sandunima 
Published: April 2023

Abstract
The theoretical triangulation (TT) in social media marketing communication and business performance is rare to observe. The purpose of this paper is to present a critical review of the contributions of multiple theories of performance expectancy theory (PET), effort expectancy theory (EET), and social influence theory (SIT) and explain whether social media marketing communication (SMMC) moderates the relationship between those theories and business performance (BP). A sample of 218 cashew salespeople from Sri Lanka were surveyed, and the data were analysed using structural equation modelling (SEM) through AMOS 26.0. The finding of the SEM analysis indicated that PE, EE and SI have significant positive relationship with potential sellers’ business performance. The moderation effect results showed that SMMC was a poor moderator of the relation between the EE and BP, as well as the SI and BP, nevertheless, the result showed that SMMC is a partial moderator of the relation between the PE and BP. The current study method necessitates caution in generalizing the findings. More variables may be introduced in future studies to explore the moderation effect between the predictor and BP of the unified theory of acceptance and use of technology (UTAUT) framework. The current study helps cashew sellers widen their horizons while evaluating the practical results of academic research. The findings of this study not only demonstrate that the TT appears to be acceptable in explaining predictors and BP in the cashew industry, but also indicate the resilience of the TT’s ability to predictors and BP in a different research context. Through SEM analysis, this study attempts to add SMMC as a moderator in the UTAUT framework and investigate the moderating effect between predictors and BP. In order to that this study aims to bridge the gap between these moderating effects and how salespeople in SMMC impact BP.