bluuebunny/crossref_metadata_2025_split huggingface dataset:
Modulating the size distribution of preformed BaHfO3 nanocrystals towards effective flux pinning in MOD-derived YBCO-coated conductors
Authors: Yang Liying , Huang Rongtie , Zhou Xinghang , Chen Jing , Liu Zhiyong , Li Minjuan , Wang Gang , Cai Chuanbing 
Published: May 2024

Abstract
The added BaMO3 (BMO, M = Zr, Hf) nanocrystals into REBa2Cu3O7−δ
(REBCO, RE = Y or other rare earth) superconducting films by the technology of preformed nanocrystal addition from colloidal precursor solutions have coarsened after sintering of the REBCO films, which limit the BMO size control and flux pinning enhancement. In the present work, the evolution of the size of BaHfO3 (BHO) nanocrystals in the YBCO films is studied. The collection process of BHO nanocrystals is optimized to successfully separate BHO with an average size of 6 nm into two parts with average sizes of 4.5 nm and 7.7 nm, respectively. The evolution of three different BHO sizes in YBCO superconducting films with a thickness of 2.2 μm and 10 mol% addition reveals that the small-size preformed nanocrystals decomposed at high temperatures to release Hf ions, resulting in the coarsening of other preformed BHO nanocrystals. After modulating the BHO size by reducing the amount of small-size BHO, the coarsening factor is reduced from 1.6 to 1.1, leading to a better in-field performance, especially at low temperatures. At 30 K@1 T, the critical current density (J
c) of the 7.7 nm BHO-added YBCO increases by 23% and 50% than cases of 6 nm and 4.5 nm, respectively, being of great guiding value in the technology of performed nanocrystal addition.
Modelling the mechanics of 32 T REBCO superconductor magnet using numerical simulation
Authors: Srivastava Arpit Kumar , Pardo Enric 
Published: May 2024

Abstract
High-temperature REBCO superconducting tapes are very promising for high-field magnets. With high magnetic field applications there are high electromechanical forces, and thus a concern for mechanical damage. Due to the presence of large screening currents and the composite structure of the tape, the mechanical design of these magnets is not straightforward. In addition, many contemporary designs use insulated winding. In this work, we develop a novel two-dimensional axi-symmetric finite element tool programmed in MATLAB that assumes the displacement field to be within a linear elastic range. The stack of pancakes and the large number of REBCO tape turns are approximated as an anisotropic bulk hollow cylinder. Our results agree with uni-axial stress experiments in the literature, validating the bulk approximation. Here, we study the following configuration. The current is first ramped up to below the critical current and we calculate the screening currents and the forces that they cause using the minimum electromagnetic entropy production method (MEMEP) model. This electromagnetic model can now take insulated magnets into account. As a case study, a 32 T REBCO superconductor magnet is simulated numerically. We perform a complete mechanical analysis of the magnet by including the axial and shear mechanical quantities for each pancake, unlike in previous work where only radial and circumferential quantities were focused on. The effect on mechanical quantities without the screening current is also calculated and compared. It is shown that including the screening current-induced field strongly affects the mechanical quantities, especially the shear stress. The latter may be a critical quantity for certain magnet configurations. Additionally, in order to overcome high stresses, a stiff overbanding of different materials is considered and numerically modelled, which significantly reduces the mechanical stresses. The finite element-based model developed is efficient in calculating the mechanical behaviour of any general superconductor magnet and its devices.
Optimization of oil recovery using heated low salinity water (HLSW) in the horizontal sand pack column during water flooding: radiotracer intervention
Authors: Othman Noraishah , Mujaddid Bin Abdul Halim Akram , Firdaus Hakimi bin Mohd Zulkarnain Muhammad , Hizam Yusoff Nazrul 
Published: May 2024

Abstract
Water-flooding is a prevalent technique for secondary oil recovery that is capable to increase oil recovery by up to 45%. Due to its accessibility, affordability, and simplicity, water flooding is the most frequently used secondary oil recovery technique. However, the efficiency of conventional water flooding is limited by capillary forces which holds the residual crude oil in pore structures. Moreover, during water flooding operation, the injected fluid does not penetrate sufficiently due to low permeability or presence of channelling inside the sandstone reservoir. Therefore, in this study, thermal recovery was introduced to 100ppm (0.1g/L) low salinity water (LSW) in order to investigate the percentage of oil recovery during water flooding. A horizontal sand pack column was used for water flooding experiment and temperature and injections rate are the parameters to be optimised with respect to percentage of oil recovery. The column was initially packed with 125micrometer sieved sand to ensure constant homogeneity is achieved. Initially, formation water which comprised with NaCl, CaCl2 and MgSO4 was introduced inside the column together with light oil and was aged overnight. TAPIS oil with viscosity of 0.001382 Pa.s (1.382cP) was used as light-oil in this study. The injection rate was set to 1 mL/min, 2 mL/min, and 3 mL/min respectively whereas, the temperature of the LSW was heated at 50 °C, 70 °C, and 90 °C subsequently. Heated water was supplied continuously throughout the sand pack which was heated using water blanket to retain heat at 70°C (reservoir temperature). In conclusion, 3 mL/min and 70°C were identified as optimum parameters and the oil recovery experiment was proceeded with liquid radiotracer using Technecium-99m (Tc-99m) intervention and resulted with 73% of yield. Nevertheless, the radiotracer intervention only provides the Residence Time Distribution (RTD) model which describe the behaviour of the sand pack during water flooding process.
Initial findings of autonomous radiation mapping robot field test
Authors: Izzuan Mohd Ghazali Muhammad , Aira Abd Rahman Nur , Ramli Nabilah , Muhd Sarowi Suzilawati , Zahidee Taat Muhamad , Hasnulhadi Ahmad , Che Soh Syirrazie , Lombigit Lojius , Arymaswati Abdullah Nor , Aziz Noor Farhana Husna A , Shafiq Sazali Mohd , Ahmad Azimawati , Salleh Khairul 
Published: May 2024

Abstract
Radiation mapping using mobile robotic can minimize the risk of operator exposure to radiation while providing detailed radiation maps of targeted areas. Despite its potential advantages, the use of this technology is still limited and requires further investigation. In a previous study, an autonomous radiation mapping robot was designed and developed. This paper presents the initial findings on autonomous radiation mapping field test that focuses on the operation procedures and the challenges faced during the robot deployment. Temporary solutions implemented to overcome the challenges are also discussed. The results will provide insights for future researchers and operators working on mobile robotic technology for radiation mapping.
Lagrangian and Eulerian approach to predict the movement of radionuclides in selected potential sites in Malaysia during the monsoon period
Authors: Muhamad L H , Karim M K A , Yusof K A , Basri N A 
Published: May 2024

Abstract
In computing the movement of particles through the fluid, three types of dispersion models are used which are Gaussian plume models, Lagrangian puff models, and small-scale numerical models. Lagrangian particle dispersion models are increasingly used for nuclear applications. In this study, the usage of the Lagrangian model is implemented in a Hybrid Single Particle Lagrangian Integrated Trajectory (HYSPLIT) which combines with the Eulerian model to predict the movement of radionuclides from the simulated nuclear power plant accident in selected locations in Malaysia. These include nuclear risk studies in these areas, emergency response systems, and source term analyses. This study aims to compare the risk from the dispersion of 137Cs from a simulated Nuclear Power Plant (NPP) at Mukah and Tasik Kenyir during the Northeast monsoon (8th October 2022) and Southeast monsoon (16th May 2022). The HYSPLIT model was set up based on the meteorological data during both monsoon periods and was simulated for 5 days. The outcomes revealed that the concentration of 137Cs is higher at Tasik Kenyir compared to Mukah for both during the Northeast monsoon period (3.5 x 107 Bq/m2) while for Southwest monsoon, the result is vice versa where the concentration of 137Cs at Mukah is (2.2 x 107Bq/m2). The activity concentration is then converted into rate effective dose measurement and compared with the limit suggested by ICRP which is 1 Sv per year. It is concluded that Tasik Kenyir is a more suitable location to build NPP compared to Mukah as the movement of radionuclides was dispersed to the location that contained less population.
Design and integration of a radiation detector module for robot operating system (ROS)
Authors: Aira Abd Rahman Nur , Salleh Mohamed Sahari Khairul , Zahidee Taat Muhammad , Lombigit Lojius , Arymaswati Abdullah Nor , Aziz NFH , Ramli N , Che Soh Syirrazie , Izzuan Mohd Ghazali Muhammad , Baharuddin MZ , Yeng Weng Leong 
Published: May 2024

Abstract
In this paper, we present a radiation detector module that can be seamlessly integrated with Robot Operating System (ROS) to enable robots to perform radiation measurements in hazardous environments. The module is designed with a detector PCB and connectors that are compatible with an Arduino shield. The Arduino firmware is programmed with a counter-timer algorithm and publishes data to the ROS environment, allowing for easy visualization of the data in a 2D occupancy map. Our experimental results demonstrate the module’s effectiveness in inspecting and reconstructing the robot’s path during operations. This paper provides a valuable contribution to the field of robotics by enabling robots to perform radiation measurements safely and accurately in dangerous environments.
Analysis of Thorium (Th) and Uranium (U) in radioactive wastewater sample in accordance with American Public Health Association (APHA) 3125 method
Authors: Abdul Zali Munirah , Hashim Azian , Abd Shukor Shakirah , Aminah Omar Siti , Laili Zalina 
Published: May 2024

Abstract
The main issue with thorium (Th) and uranium (U) in radioactive wastewater is the potential of these elements to contaminate the water bodies. The unregulated radioactive wastewater release can affect the ecosystem and potentially harm aquatic life. Therefore, there is a need to establish the analysis of Th and U using standard method to obtain better sensitivity and good confidence in the final report. In this study, the determination of uranium and thorium was employed using the American Public Health Association (APHA) method 3125 standard method. The method performance and method detection level (MDL) samples for APHA 3125 were prepared in the deionized water and digested using hot block (APHA 3030E) and microwave digester (APHA 3030K). The quantification of 238U, 235U and 232Th in the method performance and MDL samples was performed using Inductively Coupled Plasma-Mass Spectrometry (ICP-MS). From the results, the method performance samples for both digestion methods were in accordance with the APHA requirement. The MDL obtained from APHA 3030E for 232Th, 238U, and 235U were 5, 7, and 8 μg L−1 respectively. Meanwhile, the MDL obtained from the microwave digester for 232Th, 238U, and 235U, and were 2, 3, and 3 μg L−1 respectively. The APHA 3030K digestion technique gives lower and better detection limit compared to the APHA 3030E technique. Based on APHA 3030K MDL, 232Th was detected in the radioactive wastewater sample while 238U and 235U were less than MDL. Meanwhile, for APHA 3030E, all elements were below MDL. This study will enhance the detection of uranium and thorium in the radioactive wastewater sample towards better environmental monitoring programs at the national and global levels.
The potential of NAA and ICP-MS for determining soil dispersibility in relation to landslide incidents
Authors: Shah A S N , Zali M A , Nazer N S M , Hashim A , Rusdi A , Ismail A H 
Published: May 2024

Abstract
Dispersive soils pose significant challenges due to their inherent tendency to rapidly respond to the presence of water, resulting in erosion and heightened susceptibility to landslides. The inclusion of sodium (Na) onto the surface of soil clay particles results in the attenuation of the electrochemical interactions between the dispersed soil, leading to the repulsion and subsequent migration of the clay particles away from one another. This study employed Neutron Activation Analysis (NAA) and Inductively Coupled Plasma Mass Spectrometry (ICP-MS) to assess the Sodium Adsorption Ratio (SAR) and Exchangeable Sodium Percentage (ESP) as indicators of soil dispersibility. The results indicate that soils containing montmorillonite clay mineral exhibit greater values of SAR > 11 and ESP > 20 in comparison to soils containing other clay minerals i.e. kaolinite, illite, and vermiculite. The calculated SAR and ESP values obtained from both analyses demonstrate a notable agreement, indicating a positive correlation. In conclusion, it is apparent that both NAA and ICP-MS method has the capability to be applied for the purpose of predicting soil dispersibility in landslide-prone regions of Malaysia.
Underground utility inspection using ground penetrating radar
Authors: Sarah Tengku Amran Tengku , Ridzuan Ahmad Mohamad , Hazreq Haron Amer , Azreen Masenwat Noor , Mustapha Ismail , Fajri Osman Mohd , Abd Razak Noryana , Ahmad Khusaini Adnan Mior , Haziq Rahman Akmal , Afiq Adnan Amir , Ali Hasimah 
Published: May 2024

Abstract
Underground utility refers to any below-ground line, installation, or structure used by a service or utility provider. Underground utility inspection is a process of examining the designated area that needs to be inspected in detail. The purpose of the inspection is to ensure that the underground utility is in good condition and to check for any faults. By using the ground penetrating radar (GPR), the technology can capture images below the surface of the ground using radio waves. The various data through previous references are used to discuss and analyse the capability of GPR for underground utility inspection to ensure its gives the best performance for the inspection. GPR technology has become an essential tool for locating buried utilities and preventing damage and accidents during construction projects. This paper explores various advancements in GPR technology, including data processing methods and scanning techniques, to improve the accuracy and effectiveness of underground utility mapping. The research presented in this paper highlights the abilities of GPR to inspect underground utilities. The GPR data used in this project was collected from the evaluation and verification facility (EVF) in the Malaysia Nuclear Agency. The accuracy of these predicted positions was validated from GPR data and compared with as-built drawings from the contractor. The alternative analysis approaches that could be applied to improve the GPR accuracy when the optimum conditions are not met are also discussed.
The impacts of pullulan soaking on radish seed germination and seedling growth under salt stress
Authors: Li Piwu , Gu Jierui , Liu Keyi , Zeng Qingming 
Published: May 2024

ABSTRACT
Pullulan can not only provide a source of organic carbon but also has excellent properties. However, current research is mostly limited to the physical properties of the high-molecular-weight components of pullulan, and little is known about the application of its low-molecular-weight components. This study was designed to explore the impact of presoaking of radish seeds in a pullulan solution on seed germination and subsequent seedling growth under salt stress conditions. Pullulan soaking was found to enhance the germination rates of radish seeds subjected to salt stress, while also enhancing the aboveground growth of radish seedlings. Pullulan soaking resulted in increases in chlorophyll, soluble protein, and soluble sugar concentrations in the leaves of these seedlings, together with greater peroxidase activity and root activity as well as decreases in Na+ and malondialdehyde concentrations. This provides an important reference for the application of pullulan in plant protection.
PEG modification increases thermostability and inhibitor resistance of Bst DNA polymerase
Authors: Yang Mengxia , Li Zhixing , Ren Hongjie , Lu Chen , Gao Xinyu , Xu Henghao 
Published: May 2024

ABSTRACT
Polyethylene glycol modification (PEGylation) is a widely used strategy to improve the physicochemical properties of various macromolecules, especially protein drugs. However, its application in enhancing the performance of enzymes for molecular biology remains underexplored. This study explored the PEGylation of Bst DNA polymerase, determining optimal modification reaction conditions. In comparison to the unmodified wild-type counterpart, the modified Bst DNA polymerase exhibited significantly improved activity, thermal stability, and inhibitor tolerance during loop-mediated isothermal amplification. When applied for the detection of Salmonella in crude samples, the modified enzyme demonstrated a notably accelerated reaction rate. Therefore, PEGylation emerges as a viable strategy for refining DNA polymerases, helping in the development of novel molecular diagnostic reagents.
Microscopic and molecular genetic analyses of morphological development of the actinomycete Actinoplanes missouriensis
Authors: Tezuka Takeaki 
Published: May 2024

ABSTRACT
The survival strategy of members of the bacterial genus Actinoplanes is fascinating from morphological and evolutionary perspectives. A brief motile phase is incorporated in the filamentous and resting stages of the life cycle of Actinoplanes missouriensis. Spores either lie dormant or swim under different external conditions. This review presents microscopic observations and molecular genetic analyses of A. missouriensis morphological development. Selected examples of the characterization of developmental genes and their products are also introduced.
DeGeCI 1.1: a web platform for gene annotation of mitochondrial genomes
Authors: Fiedler Lisa , Bernt Matthias , Middendorf Martin 
Published: May 2024

Abstract

Summary
DeGeCI is a command line tool that generates fully automated de novo gene predictions from mitochondrial nucleotide sequences by using a reference database of annotated mitogenomes which is represented as a de Bruijn graph. The input genome is mapped to this graph, creating a subgraph, which is then post-processed by a clustering routine. Version 1.1 of DeGeCI offers a web front-end for GUI-based input. It also introduces a new taxonomic filter pipeline that allows the species in the reference database to be restricted to a user-specified taxonomic classification and allows for gene boundary optimization when providing the translation table of the input genome.

Availability and implementation
The web platform is accessible at https://degeci.informatik.uni-leipzig.de. Source code is freely available at https://git.informatik.uni-leipzig.de/lfiedler/degeci.
Post-Proceedings Support in a Family Drug and Alcohol Court
Authors: Baginsky Mary , Hickman Ben , Manthorpe Jill 
Published: May 2024

Abstract
This article presents the findings from an evaluation of post-proceedings support (PPS) within Gloucestershire Family Drug and Alcohol Court (FDAC). PPS is offered to parents in the year immediately following a completed FDAC hearing. The article provides background on the formation and development of FDACs across England and FDAC evaluations, before detailing the specific delivery model in use in Gloucestershire. The evaluation that took place March 2020–July 2022 examined the delivery, effectiveness and impact of the support services provided to families after legal proceedings concerning child welfare due to parental substance misuse. Employing a mixed-methods approach, the study analysed quantitative data to assess outcomes such as parental cessation of substance misuse and family reunification, alongside qualitative insights through interviews exploring families' and professionals' perceptions and experiences. This evaluation sheds light on the strengths and limitations of this post-proceeding offer. It examines the extent to which the services can be said to contribute to sustainable recovery for parents and whether the model is transferable to other FDACs. It highlights the importance of continuing support for families and may provide ‘conceptual’ transferability and insights that will be relevant to other FDACs and beyond into children’s and families’ social work.
‘Closing the Gap’: How is the Use of Non-Mainstream Schools Related to the Educational Outcomes of Children in Public Care?
Authors: Sinclair Ian , Luke Nikki 
Published: May 2024

Abstract
In high-income countries, children ‘in care’ have, on average, much lower educational attainment than their peers. We explore the hypothesis that this gap can be lessened by reducing the use of non-mainstream schools (NMS). We analysed a national longitudinal data-set comprising state-educated children eligible for national examinations in 2013 at the age of sixteen years (n = 642,805), including a sub-sample of 4,847 children looked after continuously in state care for at least a year on 31 March 2013 (CLA12). Nearly four out of ten CLA12 were in NMS at the age of sixteen years: this proportion varied widely between authorities. The academic attainment of those in NMS was very low and lower on average in authorities making high use of NMS. These differences were not explained by differences in child characteristics. We argue that care removes children from stress at home and offers them an opportunity to realise their academic potential. However, concentrating children with very low attainments, behavioural problems or highly specialised needs in long-term settings makes it difficult to realise this potential. Real needs for individualised teaching in a supportive setting should be flexibly met in mainstream schools, special units within these schools or, at the most, short-term placements in NMS.