bluuebunny/crossref_metadata_2025_split huggingface dataset:
Adaptive Lqr-based Control of 3 Dof Spherical Articulated Robotic Manipulator
Authors: Suryanarayana K Suryanarayana K 
Published: January 2024

Abstract
In this work, an Adaptive Linear Quadratic Regulator (LQR) is proposed for the tracking control of a 3 DOF articulated robotic manipulator. The main objective of this work is to drive the robotic manipulator to its equilibrium point from any initial position of the end effector of a robotic manipulator in an adaptive way even if the system dynamics consist of modelling uncertainties. The conventional LQR is able to provide a good measure of robustness against disturbances and achieve good tracking performance. However, it will give degraded tracking performance in case of the presence of model uncertainties. Therefore LQR tracking performance is enhanced by using a Model Reference Adaptive Controller (MRAC) in the literature for enabling a 2 DOF system to achieve good tracking against modelling uncertainties. But it has not been applied for a 3 DOF system till date. Therefore in this work, it is proposed to be applied for such a system for the first time to realize an adaptive control. The forward and inverse kinematics level equations are formulated using an indirect form of the Denavit Hartenberg (DH) convention. The dynamics of robotic manipulator are derived using the Euler-Lagrange formulation. The dynamics of manipulator with the LQR control are considered to be the reference dynamics for the MRAC control and the modelling uncertainty will be added to the system dynamics to test its performance. The MRAC augmented LQR provides faster convergence with improved stability against modelling uncertainties.
Killing Invariants: An approach to the sub-classification of geometries with symmetry
Authors: Brown Christian , Gorban Matthew , Julius William , Radhakrishnan Ramesh , Cleaver Gerald , McNutt David Duncan 
Published: January 2024

Abstract

In principle, the local classification of spacetimes is always possible using the Cartan-Karlhede algorithm. However, in practice, the process of determining equivalence of two spacetimes is potentially computationally difficult or not at all possible. This difficulty will arise whenever the classifying invariants are either high-degree rational functions or depend on transcendental functions without standard inverses. In the case that spacetimes admit Killing vectors with non-trivial orbits, we propose a new set of invariant quantities, called Killing invariants. These invariants will allow for the sub-classification of spacetimes admitting the same group of symmetries and will, in principle, be substantially less complicated than any other known set. We apply this approach to the class of static spherically symmetric geometries as an illustrative example.
Bi-Objective Influence Maximization with Consideration of Node Burden
Authors: Feng Mingyang , Zhao Qi , He Shan , Shi Yuhui 
Published: January 2024

Abstract
Influence maximization aims at finding a set of nodes with the maximum influence in a network. Apart from the influence, the burden of nodes is worth considering as an objective but has been neglected in the literature. Herein, the burden refers to the capacity of a node to serve its influenced nodes, e.g., the storage of a device in the device-to-device networks. In this paper, we propose a new bi-objective influence maximization problem that jointly maximizes the influence of seed nodes and minimizes the variance of the burden of seed nodes, called Influence Maximization with Burden. We provide intuitive and empirical evidence to demonstrate the feasibility and necessity of the proposed problem. Furthermore, we develop two algorithms to solve the proposed influence maximization problem. One is a fast suboptimal algorithm based on the reverse reachable sampling method. The other is a memetic algorithm with a novel meme operator to identify promising nodes. The results of the experiments on synthesis and real networks illustrate that the proposed algorithms perform more effectively and efficiently than other existing algorithms. We published our codes on GitHub: https://github.com/fmyzckj.
Abortion care in Ethiopia: Challenges and Opportunities
Authors: Adane Haile Bekele , Roets Lizeth 
Published: January 2024

Abstract
Introduction
Every year, approximately 210 million women globally experience pregnancy, with roughly one-third of these pregnancies resulting in miscarriage, stillbirth, or induced abortions. The presence of restrictive abortion laws not only hinders women from accessing abortion care but also creates hurdles for healthcare providers in delivering this service within legally authorized health facilities
Objective: To identify the challenges and opportunities experienced in receiving and providing abortion care in the public health facilities of Ethiopia.
Methods: A facility-based cross-sectional study was carried out in SNNPR, Ethiopia, where data was collected from abortion care users through face-to-face questionnaires administered by trained midwives. Healthcare providers also completed a self-administered questionnaire. The data collected underwent thorough checking, cleaning, and entry into EpiData version 3.1 software. Subsequently, the data was exported to IBM Statistical Package for Social Sciences software (SPSS) version 25 for analysis. Data collection and analysis were from 2020 to 2021.
Results: Women who attended abortion care at public health centers and public hospitals enrolled in the study. In addition to abortion care, 162 (39.2%) women had the opportunity to received HIV/AIDS services, 139 (33.7%) received family planning services and 8 (1.9%) had received both HIV and FP services. These abortion care users identified several challenges, including increased waiting time, concerns about confidentiality, fear of stigma and discrimination, healthcare providers may be overwhelmed and decreased service quality. Healthcare providers also mentioned challenges such as a lack of trained staff, socio-cultural issues in the community, insufficient medical supplies, and inadequate equipment for providing abortion services. On the other hand, opportunities for improving abortion care were identified as enhanced teamwork, increased access to other health services, reduced stigma and discrimination, more efficient use of staff time, and fewer visits required for healthcare services.
Conclusion: Increasing the number of and access to integrated services, adequate equipment and medication, as well as ensuring that healthcare providers are trained to be competent to offer an integrated service, would enhance the utilization of abortion care and enable the provision of comprehensive services.
Fractional variational integrators based on convolution quadrature
Authors: Belgacem Khaled Hariz , Jiménez Fernando , Ober-Blöbaum Sina 
Published: January 2024

Abstract

Fractional dissipation is a powerful tool to study non-local physical phenomena such as damping models. The design of geometric, in particular, variational integrators for the numerical simulation of such systems relies on a variational formulation of the model. In the work "Fractional Damping Through Restricted Calculus ofVariations" in "Journal of Nonlinear Science (2021) 31:46" by Jiménez and Ober-Blöbaum , a new approach is proposed to deal with dissipative systems including fractionally damped systems in a variational way for both, the continuous and discrete setting. It is based on the doubling of variables and their fractional derivatives. The aim of this work is to derive higher-order fractional variational integrators by means of convolution quadrature (CQ) based on backward difference formulas. We then provide numerical methods that are of order 2 improving a previous result of the authors. The convergence properties of the fractional variational integrators and saturation effects due to the approximation of the fractional derivatives by CQ are studied numerically.
Implementing Indirect Data-Driven Learning and Traditional Deductive Approach to Teach Cohesive Devices: The Case of Persian High School Students Learning English as a Foreign Language
Authors: Moradi Bita , Pasquarella Adrian 
Published: January 2024

Abstract

This study evaluated the effect of indirect Data-Driven Learning (DDL) and Traditional Deductive Approach (TDA) on the knowledge of cohesive devices in a virtual classroom. Thirty-one English as a foreign language learners (EFL) (mean age = 16.25) were randomly assigned to DDL or TDA conditions. The DDL (treatment) group (N = 16) was required to study materials derived from authentic corpora, prepared by their instructor. The TDA (control) group (N = 15) was taught using a formulaic and mechanical structure. Participants took a pre-test, immediate post-test, and delayed post-test of cohesive devices. The DDL participants also completed a semi-structured interview.
The results revealed that although both groups enhanced the knowledge of cohesive devices, indirect DDL yielded more learning gains at post-test. However, the DDL group showed equal learning retention compared to the TDA group at follow-up. Finally, an interview with the indirect DDL participants demonstrated that most of them held positive attitudes toward applying indirect DDL to virtual classrooms.
The study concludes with DDL educational implications and the importance of implementing DDL for young EFL students with intermediate English proficiency using virtual tools. We provide some limitations of the current study and offer suggestions for future research on DDL.
Risk Preference and Child Learning outcomes: A Study on Ghana
Authors: Mefful John , Nunoo Jacob , Kofinti Raymond 
Published: January 2024

Abstract
Human capital investment is noted to increase labour market success and future welfare security. But empirical studies have established that investment in human capital formation is a risky venture. Consequently, the risk preference of funders is pivotal in influencing the optimal allocation of household’s scarce resources in educational investment. Against this backdrop, we leveraged the seventh round of Ghana Living Standards Survey data to explore the relationship between parental risk preference and child learning outcomes. The instrumental variable estimation technique was employed to solve the endogeneity problem associated with the two variables. We found that parental risk preference is a significant determinant of children’s learning outcomes in Ghana given that children from risk loving homes have better learning outcomes. In addition, risk loving homes have better learning outcomes for girls and public-school children compared to boys and private school attendees. Further, children from risk-loving female headed households have better learning outcomes compared to children from risk-loving male headed households. Finally, risk loving households spend more on the education of their children than risk averse households. Our empirical test also showed that household expenditure on child education is the channel through which risk preference influence the learning outcome of children. We therefore recommend that policy makers implement programs that induce risk loving attitudes in parents.
JEL Classification: JELI22, JEL I20, JEL I21, JEL J24, JEL D81
A Thermal Approach for Modelling the Concrete Ablation during Molten Corium-Concrete Interaction
Authors: Khurshid Ilyas , Hassan Mubashir , Faizan Muhammad , Afgan Imran , Addad Yacine 
Published: January 2024

Abstract
An accident in a nuclear power plant involving a reactor core meltdown would result in instigation of molten corium, which is a mixture of nuclear fuel, claddings and structural components. In this paper, an enthalpy porosity model is proposed to comprehensively analyze the ablation of concrete during the Molten Corium and Concrete Interaction (MCCI) process. The developed numerical model is an extension of the enthalpy-porosity model and is termed as Corium-Concrete Enthalpy Porosity Model (CCEPM). The developed CCEPM Computational Fluid Dynamic (CFD) model can predict natural convection, melting and solidification. The developed model simplifies the complex phenomena of concrete ablation and its melting by incorporating the multi-region approach. The model was implemented in OpenFOAM, by developing a new solver which couples the buoyant-driven natural convection and conjugate heat transfer solvers. The thermal modelling and heat transfer capabilities of the developed solver were verified against experimental data sets. Additionally, the effect of various boundary conditions, concrete thermal conductivity and intensity of decay heat were analyzed to study their impact on concrete ablation. We observed significant low concrete ablation, controlled temperature and velocity field, for the water-cooled boundary condition. Accordingly, the ablation of concrete decreased by 17% just by imposing the water-cooled boundary condition. Similarly, when the thermal conductivity was decreased to 0.43 and 0.13 W/m. K, the ablation of concrete reduced by 38% and 75%, respectively. Furthermore, early cooling of molten corium to decrease decay heat was found to be an effective strategy to mitigate the concrete ablation successfully by 20%.
HYDROGEN GENERATOR FOR INTERNAL COMBUSTION ENGINE
Authors: Bakyt Gabit Bakytuly , Shalbayev Kalmanbet , Abdullayev Seidulla , Mazhitov Sabit 
Published: January 2024

The test of the hydrogen generator on the internal combustion engine of the car is considered in the work. In the machine, HHO and fuel are jointly burned to reduce fuel consumption and exhaust emissions. Numerous studies prove the undeniable advantage of using a car using a hydrogen generator compared to traditional fuels. The use of a lean combustible mixture in internal combustion engines reduces the volume of exhaust gases and increases thermal efficiency. Experimental results show that by adding KOH with a concentration of (35-50 g/l) to the cell, fuel consumption can be reduced (8.4-43.6%), and exhaust pollutant emissions are reduced. Thus, adding hydrogen to an internal combustion engine can reduce fuel consumption and vehicle exhaust emissions.
Identification and Functional Analysis of Circular RNAs in Ankylosing Spondylitis Patient Peripheral Blood Mononuclear Cells
Authors: Huang Dan , Liu Jian , WANG YUAN , Wan Lei , Fang Yanyan , Ding Xiang , Zhang Wandong 
Published: January 2024

Objectives:To analyze the function and roles of circRNAs in the
peripheral blood mononuclear cells (PBMCs) of ankylosing spondylitis
(AS) patients. Methods: The expression of AS-related circRNAs were
detected by high-throughput RNA-sequencing within the PBMCs of 5 AS
cases and healthy controls. After profiling circRNA expression in these
samples, differentially expressed circRNAs (DECs) were identified, and a
qPCR-based validation approach was used to confirm the differential
expression of six of these DECs in patient samples. Spearman’s
correlation tests and ROC curve analyses were further used to assess the
relationship between disease severity and the expression of DECs of
interest in AS patients, after which a putative circRNA-microRNAs
(miRNAs) interaction network was constructed leading to the detection of
six validated DECs with competing endogenous RNA (ceRNA) functionality.
Besides, cell experiments were also performed to investigate the
potential mechanism of key circRNA in AS. Results: 10,441 circRNAs were
identified in these 10 PBMC samples, with 131 total DECs including 89
and 42 that were up- and down-regulated, respectively. In qPCR
validation assays, patterns of hsa_circ_0000702, hsa_circ_0006209,
hsa_circ_0047920, hsa_circ_0001543, hsa_circ_0072697 and
hsa_circ_0005076 were confirmed to align well with RNA-seq results. In
addition, the expression levels of hsa_circ_0006209,
hsa_circ_0047920, and hsa_circ_0072697 were detected to be
positively correlated with disease severity. ROC curve analyses
suggested that hsa_circ_0072697 may offer value as a diagnostic
biomarker for AS. Cell experiments indicated that hsa_circ_0072697
could suppress the progression of AS by targeting NF-κB pathway
Conclusions: The identification of six circRNAs with putative ceRNA
functionality in AS patients highlights potential molecular mechanisms
governing this debilitating disease. However, further research will be
necessary to formally confirm the roles of these DECs and their target
miRNAs in AS. Further, hsa_circ_0072697 has a good diagnostic value in
AS patients, and it could suppress the progression of AS by targeting
NF-κB pathwa
ANALYSIS OF SUPPLY CHAIN MANAGEMENT OF AND PARTNERSHIP PATTERNS IN VEGETABLE ONLINE COMPANY: CASE STUDY AT BEJANA.ID
Authors: Anabel Vania Azalia , Abidin Zainal , Rosanti Novi 
Published: January 2024

This study aims to analyze supply chain management of vegetable products, identify supply chain performance based on the estimation of average time and partnership patterns at Bejana.id, Bandar Lampung. The case study method was used to determine the location purposively. Data were collected using questionnaires in December 2022. The sample used purposive sampling, including one person from Bejana.id, six merchant partners, and nine farmer partners. The data analysis method applied for supply chain management and partnership pattern is qualitative, and supply chain management performance is Supply Chain Operation References (SCOR). The results indicated that (1) the Bejana.id supply chain includes farmer and merchant partners, Bejana.id, and B2B (Business to Business) & B2C (Business to Consumers). The flow of products, information, and money are efficient and have not found severe issues, (2) supply chain performance at the supplier partner level is an advantage in standardized products (SP) and parity in perfect order fulfilment (POF), and for the Bejana.id level get the advantage in standardized products (SP), (3) the partnership pattern between Bejana.id and farmer partners is the common trade pattern, and between Bejana.id and merchant partners is the agency pattern. Keywords: e-commerce, partnership, SCOR, supply chain, vegetables
ANALISIS HARGA GABAH KERING PANEN DAN HARGA BERAS PREMIUM TERHADAP NILAI TUKAR PETANI DI JAWA BARAT PERIODE 2019-2021
Authors: Yulianti Nanda Devi , Gunawan Syahrul Ahmad , Hizbandyah Baiturrahmi Nur , Brata Anggita Shakarine , Maesaroh Syti Sarah 
Published: January 2024

A measure of farmer welfare knowledge is determined by the farmer exchange rate (NTP). Factors that affect farmers' wealth are the price of harvested grain (GKP) and the price of premium rice. The purpose of this study is to illustrate the analysis of premium rice price at harvest dry grain (GKP) and farmer exchange rate (NTP). The sample used is the monthly time interval from January to December in the 2019-2021 range with 36 data for each variable. Data analysis comes from secondary data taken from the Central Bureau of Statistics (BPS) report using multiple linear regression analysis test method using the SPSS application. The results showed that the price of harvested dry grains (GKP) and the price of premium rice had a positive effect on farmer exchange rates (NTP). Key words: exchange rates, farmer, rice
The Use of 3D-Based E-Handout on Excretory System Material To Improve Students' Critical Thinking Skills
Authors: Sukroni Nining Widiyanti , Kartimi Kartimi , Mulyani Asep , Marzuki M. 
Published: January 2024

Students' critical thinking skills in high school are still lacking. Learning media in textbooks is still less effective and interactive in the learning process. This study aims to analyze the improvement of students' critical thinking skills using 3D-based e-handout. This research is true-experiment research with a pretest-posttest control group design. The population in this study were all eleventh-grade Mathematics and Science major (MIPA) classes at SMAN 1 Ciwaringin, which consisted of 128 students. The samples were classes XI MIPA 1 and XI MIPA 2. This study showed a significant increase in students' critical thinking skills between experimental classes, with an average N-gain value of 0.60 (moderate category), and the control class, with an N-gain value of 0.28 (low category).ABSTRAK: Keterampilan berpikir kritis siswa di sekolah masih kurang. Media pembelajaran yang masih berupa buku paket kurang efektif dan interaktif dalam proses pembelajaran. Penelitian ini bertujuan untuk menganalisis peningkatan keterampilan berpikir kritis siswa menggunakan e-handout berbasis 3D. Penelitian ini merupakan jenis penelitian true-eksperimen dengan desain penelitian pretest-posttest control group design. Populasi dalam penelitian ini adalah seluruh kelas XI MIPA di SMAN A Ciwaringin berjumlah 128 siswa dan sampel yang digunakan adalah kelas XI MIPA 1 dan XI MIPA 2. Terdapat peningkatan keterampilan berpikir kritis siswa yang signifikan antara kelas eksperimen dengan rata-rata nilai N-gain kelas eksperimen 0,60 tergolong kedalam keriteria sedang sedangkan nilai N-gain kelas kontrol 0,28 tergolong kedalam kategori rendah.
Development of a Tourism Village Based on Community Based Tourism (CBT) at Situ Tirta Marta Purbalingga from an Islamic Perspective
Authors: Amanah Aida Qur’an  , Rini Meliana  , Azka Nur Diana  , MD. Abu Sayem  
Published: January 2024

The Situ Tirta Marta Tourism Village in Karangcegak Village is one of the tourism areas formed from the utilization of local local potential. As for its development, it applies community-based tourism (CBT) to increase tourist attraction. This study discusses how the CBT-based Situ Tirta Marta development strategy has been implemented as well as the economic perspective of Islamic development related to the development of the Situ Tirta Marta Tourism Village in Karangcegak Village, Kutasari District, Purbalingga Regency.
The research method used in this study is descriptive research with a qualitative approach. The subjects in this study were all stakeholders involved, including managers, tourism awareness groups, government, community and visitors to Situ Tirta Marta.
The results of this study concluded that the CBT-based Situ Tirta Marta Tourism Village development strategy that had been implemented was categorized into 3 aspects, namely destinations, marketing as well as institutions and human resources. All of these aspects support the development of Situ Tirta Marta in a better direction. Active support and participation from all stakeholders involved in the stages of tourism development in Karangcegak Village, especially Situ Tirta Marta. The development of tourism sustainability is in accordance with the Islamic development economy which makes humans the center of development and benefit and falah as parts that cannot be ignored. For this reason, the development of Situ Tirta Marta must be directed towards environmentally-friendly development.
A nők teológiai képzésének első száz éve Kolozsváron
Authors: PÜSÖK Sarolta 
Published: January 2024

The First Hundred Years of Women’s Theological Education in Cluj-Napoca
The initial topic of the study at hand addresses the beginnings. In terms of women’s education, one of the positive effects of the Reformation is the insistence on the widespread availability of the Bible, which was inevitably followed by the eradication of illiteracy among women. Following the Reformation, another argument emerged in favour of the importance of educating women in theology: society regarded women as a key role in raising children, so in order to raise their children educated in theology, their ability to do so became a priority. The second topic addresses the direct preconditions of the theological education of women, especially the changes in the 19th-century school history, which resulted in women’s admission to universities and opening up the opportunity for them to obtain degrees in higher education. Furthermore, the study presents the past hundred years of women’s education in theology in the Protestant educational centres of Cluj-Napoca – from the first enrolment, the first ordained woman minister up to the present time.