bluuebunny/crossref_metadata_2025_split huggingface dataset:
Factors controlling groundwater Arsenic concentration in the Red River Delta, Vietnam
Authors: Nhan Pham Quy , Trung Dang Tran , Khai Ha Quang 
Published: September 2023

Abstract
The Red River Delta (RRD) has a high population density with about 19 million inhabitants. Water supply is from surface water and groundwater resources, in which surface water is from rivers and groundwater is mainly taken from aquifers in Quaternary sediments. Last two-decade research’s results show that groundwater in some areas in the RRD are contaminated with high elevated levels of Arsenic. Many research studies investigating Arsenic pollution have found that concentrations in water samples surveyed in Hung Yen, Hanoi, Ha Nam etc exceed the permissible value for domestic use as WHO guideline and Vietnam standard as well. The key factors controlling the distribution of Arsenic in the groundwater from previous studies are formation environment, sedimentary facies, sedimentary age, salinity of pore water and even neo-tectonic activity. However, which factor is more important for controlling groundwater arsenic distribution in the RRD need to be clarified. Therefore, the objective of this study is to determine the degree of controlling factors on the distribution of Arsenic in groundwater in the RRD. An overview of previous studies on the origin of Arsenic in groundwater is the first step to analyse the factors affecting the distribution of Arsenic in groundwater. A method of superposition of the controlling factors on the basis of ArcGIS was applied. Each controlling factor was classified and assigned a certain value. The weights of the factors were determined based on expert opinions and analytical hierarchical process (AHP) method. The results of model calibration based on the current distribution of Arsenic concentration map of the Holocene and Pleistocene aquifers allow confirming the reliability of the weights of controlling factors. Research results show that the groundwater Arsenic concentration in the RRD depends mainly on the distribution of Holocene alluvium and its age. The remaining factors are very insignificant in this case.
Monitoring of nature-based solution for stabilizing eroded muddy coastline of the Chao Phraya Delta, Thailand
Authors: Charoenlerkthawin W , Bidorn K , Panneerselvam B , Sriariyawat A , Otarawanna S , Bidorn B 
Published: September 2023

Abstract
The Chao Phraya Delta (CPD), Thailand’s largest delta and low-lying muddy coast, has experienced shoreline recession for over six decades due to relative sea-level rise. A nature-based solution, bamboo fences, widely used in low-lying tropical areas, have been intensely applied along the CPD coastline during the last two decades. This study evaluated the effectiveness of bamboo fences in protecting eroded CPD coastlines using remote sensing data (aerial photographs, satellite imagery, and LiDAR observation data). Results from this study indicate that the effectiveness of bamboo fences in trapping sediment decreased over time due to the deterioration of bamboo, which generally deteriorates within four years. Additionally, the installation of multiple layers of bamboo fences did not directly increase the effectiveness of the structure in stabilizing the CPD coastline. It was also found that the mangrove shoreline can be successfully regenerated in the CPD coast where the seabed is higher than 0.5 m amsl. Because of the short life of the bamboo fences, the bamboo fence may not be the best solution for coastal protection and sustainable coastal management in a low-lying area with a high rate of shoreline recession and a low rate of sedimentation.
Numerical Simulation of Gas Flow in a Tunnel Drying Kiln System
Authors: Tran Viet Tan , Nguyen Duong Khoa , Dang Nguyen Thanh , Le Khoi Ngoc Minh , Duong Yen Hoang Phi , Le Tan Minh 
Published: September 2023

Abstract
In the present study, we conduct the numerical simulation for a large-scale tunnel drying kiln in a brick factory performance by Ansys Fluent software. The airflow in the dryer was simulated by three-dimensional turbulence model with a domain of tunnel drying kiln is solved for appropriate boundary conditions. The velocity and temperature distribution of the dryer using the Realizable k–ε model. The CFD model is used to simulate the steady stage heat transfer and airflow within the dryer. In addition, the the meshing method for the dryer was investigated and show the influences on both air temperature distribution and air velocity distribution inside the dryer. From the simulation, the highest and the lowest temperature are 1025 K and 670 K respectively.
Heterogeneous Fenton treatment of actual textile and dyeing wastewater by α-Cu-FeOOH nanomaterial
Authors: Nguyen Trung Thanh , Thi Ngoc Diem Doan , Phan Phuoc Toan , Thi Thuy Nguyen , Thich Le Tri , Thi Cam Tien Nguyen , Thi Quynh Anh Nguyen , Padungthon Surapol , Nguyen Nhat Huy 
Published: September 2023

Abstract
This work reports the successful synthesis and application of α-Cu-FeOOH in heterogeneous Fenton treatment of actual textile dyeing wastewater. The material characteristics were analyzed by SEM, EDX, BET, FTIR, and XRD methods. In heterogeneous Fenton tests, the highest TOC and color removal efficiencies were found to be 46.88 and 37.98%, respectively, in the suitable conditions of Cu/Fe molar ratio = 5%, [H2O2] = 0.1 M, [α-Cu-FeOOH] = 0.6 g/L, pH = 7, and after 60 min. The values of color and TOC after treatment well met the discharge standard for textile dyeing wastewater (QCVN 13:2015/BTNMT, Column B). The presence of copper in the material enhanced the activation of H2O2 in heterogeneous Fenton reactions under neutral environments. Therefore, α-Cu-FeOOH material has great potential for practical application in textile wastewater treatment with an initial color of 185.6 mg/L and TOC concentration of 72.54 mg/L.
Integration of a numerical model in curvilinear coordinates with sand mining component for bottom morphology simulation
Authors: Kim T T , Huy N D Q , Phuoc N V , Phung N K , Bay N T 
Published: September 2023

Abstract
Numerical models for calculating bottom morphology are increasingly popular because of their long-term forecasting capabilities as well as their ability to identify causes. However, the simulation of bottom morphology, in addition to natural factors, is also governed by economic activities, especially sand mining. In this paper, we propose the development of the numerical model in curvilinear coordinates combined with a sand mining component that simulates the bottom morphology of the Tien river segment in the Mekong Delta as a study area. The modeling theory relies on the Reynolds equation system, which is combined with the suspended sediment transport equation in a two-dimensional curvilinear coordinate system. The process of averaging is performed over the depth. The suspended sediment transport equation incorporates a source function that describes the upward or downward movement of particles. In the model for bottom morphology, a component for sand mining is included, which accounts for the rate at which sand is extracted from the riverbed. This component is integrated into the equation governing the continuity of the bed load. The findings demonstrate that the numerical model effectively captures the changes in the river’s bottom morphology resulting from sand mining. Specifically, when the sand mining component is employed, the model accurately represents the actual development of the bottom morphology in river segments where sand mining occurs. Furthermore, the downstream bed alterations are significantly influenced by sand mining activities. By incorporating the sand mining component into the model, it becomes a valuable tool for simulating the bottom morphology in river segments subjected to sand mining, thus aiding in sand mining planning and the management of disaster risks associated with bank erosion.
A study on the applicability of microbially induced calcium carbonate precipitation on soil-sand stabilization through the bio-cementation process
Authors: Huynh Nguyen Ngoc Tri , Huyen Nguyen Pham Huong , Truong Ho Van , Son Nguyen Khanh 
Published: September 2023

Abstract
Soft or loose sandy soils, particularly in ground slopes and high rainfall zones, are potentially dangerous and have caused many problems such as damage, landfall, or even erosion. Bio-cementation through bacterial mineralization can be considered a “green” and “eco-friendly” solution toward sustainable development. Urelytical bacteria that decompose urea for calcium carbonate precipitation were selected as the primary agent for the bio-cementation process. This study clarifies the effects of particle sizes on bio-cementation. Moreover, the Vietnam isolated species and the commercial one were investigated to compare the biomineralization capability. A simulated rainfall model was set up to evaluate the sand samples by the water prevention and erosion and wash-out tests. Also, the microstructure observations were conducted through optical microscopes, scanning electron microscopes, and phase composition analysis.
Potency of coconut water as raw material for biodegradable plastics
Authors: Barlina Rindengan , Liwu Suzanne , Wungkana Jerry , Alouw Jelfina C. 
Published: September 2023

Abstract
Plastics have contributed to global greenhouse gas emissions as the main cause of climate change. Coconut water has the potential as a good raw material for developing biodegradable plastics, an environmentally friendly alternative. About 22% of the coconut fruit component is coconut water. Based on the conversion results using Indonesian tall coconut varieties, in every coconut processing that produces 1 ton of copra, the by-product of coconut water is 1,158 liters. If coconut water is not used and only thrown away, it will affect the surrounding environment. With the help of Acetobacter xylinum bacteria, saccharose in coconut water is converted into glucose and fructose. A. xylinum has the ability to form cellulose through a coconut water fermentation process called biocellulose (bacterial cellulose). Bacterial cellulose has the same chemical structure as cellulose derived from plants, but bacterial cellulose has advantages, including high purity, high tensile strength, and elasticity. The global Biodegradable Plastics market in 2019 was around USD 3.4 billion and is expected to grow by 13% with a value of USD 8 billion in 2026. Biodegradable plastic made from coconut water has an impact on increasing added value while maintaining environmental sustainability.
Evaluation of low-cost protein substitutes in adult diet of Apertochrysa astur Banks (Neuroptera: Chrysopidae) under laboratory conditions
Authors: Chalapathi Rao N B V , Neeraja B , Govardhan Rao V , Ramani BS 
Published: September 2023

AbstractThe exotic rugose spiraling whitefly (RSW),Aleurodicus rugioperculatusemerged as an important pest on plantation crops, especially coconut. Among the various natural enemies, the predatorApertochrysa asturwas found to be highly promising against RSW due to its amenability for mass production in the laboratory. As part of standardization of adult feed diet of this predator the diet comprising honey, Protein X, glucose, coconut pollen and yeast was found to be most suitable in the development of theA. asturadults and recorded superior biological parameters, especially in fecundity, larval hatching, larval pupation, male and female longevity and hatching too. Among the various protein substitutes evaluated instead of Protein X in the adult feed diet ofA. asturgreen gram, bengal gram and horse gram recorded parameters on fecundity, larval, pupal survival and adult emergence equivalent to Protein X included diet in F0and F1generations thereby providing scope in reduction of production cost of the predator.
Planting Techniques for Climate Resilient and Perceptible Economic Benefits of the Distributed Malayan Yellow Dwarf Coconut Seedlings by the Anambra State Government
Authors: Obianefo Chukwujekwu A. , Okoroji Nma O. , Forster Ezenwa I. , Shah Zahoor A. 
Published: September 2023

Abstract
This paper discusses the plantation techniques and perceptible economic benefits of the Anambra State Government’s distributed Malayan Yellow Dwarf coconut seedlings. Through the distributed seedlings, the government seeks to ensure climate resilience and economic benefits for its people. Data was collected from a cross-section of 384 respondents randomly selected to represent the entire population. The study revealed the recommended planting techniques disseminated as trimming and dressing the seedlings to prepare for planting, ploughing the land to encourage aeration, 6.5 meters apart planting space, and digging a 2-square foot depth, among others. The study also found that 73.2% of the sample is moderately aware of these recommended techniques and that the awareness was determined by gender, educational level, agricultural experience, and household size. The respondents had positive feelings about the investment by the government, and it was recommended that policymakers should intensify efforts to populate the State with high-yielding coconuts that are likely to start producing in the next 3 – 4 years as a way of repositioning the State revenue generation.
Microstructure and properties of plasma cladding Ni-based alloy coated on 40Cr Surface
Authors: Xun Qiwen , Liu Yanhui , Pan Zengren , Wu Ying 
Published: September 2023

Abstract
Three Ni-based alloys (Ni60, Ni65, Ni60W) were selected to be coated on the surface of 40Cr and 20 steel. The microstructure, phase composition and elemental distribution of the coatings were characterised respectively to discuss the effects of different substrates, cladding materials, and processes. The corrosion and thermal fatigue behaviour of the coatings were investigated. The results show that the coatings prepared by plasma cladding have a dense microstructure with few defects and a white bright band of a certain thickness was formed between the coating and the substrate. The white bright band between the coating prepared by flame spraying and the substrate was not obvious. The main phase compositions of the coatings are Cr23C6, Cr7C3, Ni2.9Cr0.7Fe0.36 and FeNi3 phases, with the W2C phase also present in the Ni60W coating. The heat-affected zone (HAZ) of the coating is influenced by the coating preparing processes, substrate material and process state of substrates: the size of the HAZ of the plasma cladded coating is smaller than that of the flame sprayed coating, the HAZ of the 40Cr substrate is smaller than that of the 20 steel, and the HAZ of the tempered 40Cr substrate is smaller than that of the annealed 40Cr substrate. The Ni-based alloy coating can effectively improve the surface hardness of the substrate. The Ni65 alloy powder is the most effective (HV0.5992), followed by the Ni60W alloy powder (HV0.5798) and finally the Ni60 alloy powder (HV0.5712). The Ni65 alloy coating has the relatively best thermal fatigue properties, followed by the Ni60W alloy coating and the Ni60 alloy coating is the relatively worst. At the same time, the corrosion resistance of different Ni-based alloy coatings is consistent with the thermal fatigue properties of the coatings.
UV-converted heterogeneous wettability surface for the realization of printed micro-scale conductive circuits
Authors: Shui Ke , Fang Yuxiao , Li Zerui , Wang Zhenguo , Jiang Subin , Yin Ni , Chen Qi , Guo Feng-Qi , Zhao Jian-Wen , Lin Jian , Ma Chang-Qi 
Published: September 2023

Abstract
Achieving high precision in the fabrication of electronic circuits through additive manufacturing requires breaking the resolution limit of traditional printing processes. To address this challenge, we have developed a novel approach that involves preparing a heterogeneous wetting surface using a light-sensitive NBE-acrylate resin. By creating differences in surface energy on the substrate, we can limit the spread of the ink and surpass the limitations of conventional processes, achieving a printing resolution of 5 μm. The NBE-acrylate resin can be cross-linked under white LED light illumination (with λ > 400 nm) to yield a hydrophobic surface, which can be converted to a hydrophilic surface by UV light illumination (λ = 254 nm). The photochemical reaction of the NBE-acrylate resin under different light irradiation was confirmed by Fourier transform infrared spectroscopy (FTIR) and atomic force microscope (AFM) microforce measurements. In combination with a photomask, patterned heterogeneous wettability surfaces were prepared, which can be utilized for printing precision electronic circuits. Micrometer-scale printed circuits with a low line-to-space (L/S) of 5/50 and 10/10 μm were successfully achieved by optimizing the ink formulation, which is significantly beyond the printing resolution. In the end, fully printed thin film transistor arrays based on semi-conducting carbon nanotubes were achieved, which showed higher charge carrier mobilities of 1.89–4.31 cm2 s−1 V−1 depending on the channel width, demonstrating the application of this precision printed technique.
Simple framework for systematic high-fidelity gate operations
Authors: Rimbach-Russ Maximilian , Philips Stephan G J , Xue Xiao , Vandersypen Lieven M K 
Published: September 2023

Abstract
Semiconductor spin qubits demonstrated single-qubit gates with fidelities up to

99.9
%

benchmarked in the single-qubit subspace. However, tomographic characterizations reveal non-negligible crosstalk errors in a larger space. Additionally, it was long thought that the two-qubit gate performance is limited by charge noise, which couples to the qubits via the exchange interaction. Here, we show that coherent error sources such as a limited bandwidth of the control signals, diabaticity errors, microwave crosstalk, and non-linear transfer functions can equally limit the fidelity. We report a simple theoretical framework for pulse optimization that relates erroneous dynamics to spectral concentration problems and allows for the reuse of existing signal shaping methods on a larger set of gate operations. We apply this framework to common gate operations for spin qubits and show that simple pulse shaping techniques can significantly improve the performance of these gate operations in the presence of such coherent error sources. The methods presented in the paper were used to demonstrate two-qubit gate fidelities with

F
>
99.5
%

in Xue et al (2022 Nature
601 343). We also find that single and two-qubit gates can be optimized using the same pulse shape. We use analytic derivations and numerical simulations to arrive at predicted gate fidelities greater than 99.9% with duration less than,

4

/

(
Δ

E
z

)

where

Δ

E
z

is the difference in qubit frequencies.
Interactive association between insomnia symptoms and sleep duration for the risk of dementia—a prospective study in the Swedish National March Cohort
Authors: Tan Xiao , Åkerstedt Torbjörn , Lagerros Ylva Trolle , Åkerstedt Anna Miley , Bellocco Rino , Adami Hans-Olov , Ye Weimin , Pei Jin-Jing , Wang Hui-Xin 
Published: September 2023

Abstract

Objective
Given the importance of sleep in maintaining neurocognitive health, both sleep duration and quality might be component causes of dementia. However, the possible role of insomnia symptoms as risk factors for dementia remain uncertain.

Methods
We prospectively studied 22,078 participants in the Swedish National March Cohort who were free from dementia and stroke at baseline. Occurrence of dementia was documented by national registers during a median follow-up period of 19.2 years. Insomnia symptoms and sleep duration were ascertained by Karolinska Sleep Questionnaire. Multivariable Cox proportional hazards models were used to estimate hazard ratios (HR) and 95% confidence intervals (CI).

Results
Compared to participants without insomnia at baseline, those who reported any insomnia symptom experienced a greater incidence of dementia during follow-up (HR 1.08, 95% CI: 1.03, 1.35). Difficulty initiating sleep versus non-insomnia (HR 1.24, 95% CI: 1.02, 1.52), but not difficulty maintaining sleep or early morning awakening was associated with an increased risk of dementia. Short sleep duration was associated with increased risk of dementia (6 h vs. 8 h, HR 1.29, 95% CI: 1.11–1.51; 5 h vs. 8 h, HR 1.26, 95% CI: 1.00–1.57). Stratified analyses suggested that insomnia symptoms increased the risk of dementia only amongst participants with ≥7 h sleep (vs. non-insomnia HR 1.24, 95% CI: 1.00–1.54, P = 0.05), but not amongst short sleepers (&lt;7 h). Short sleep duration also did not further inflate the risk of dementia amongst insomniacs.

Conclusion
Insomnia and short sleep duration increase the risk of dementia amongst middle-aged to older adults.
Infectious complications among patients receiving ibrutinib for the treatment of hematological malignancies
Authors: Tham Kenneth , Prelewicz Stacy , deHoll Sara , Stephens Deborah M , Gomez Carlos A 
Published: September 2023

Abstract

Purpose
Ibrutinib is a Bruton’s tyrosine kinase inhibitor used to treat multiple hematologic malignancies and graft-versus-host disease. Though less myelosuppressive than cytotoxic chemotherapy, increased infections, including invasive fungal infections (IFIs), have been reported with ibrutinib use. This study aimed to determine the characteristics and risk factors for infection associated with ibrutinib at our institution.

Methods
Patients who received ibrutinib between June 2014 and August 2019 were included. Primary endpoints were the incidence of any infection and the incidence of serious infection (defined as hospitalization, parenteral antimicrobial therapy, or pneumonia regardless of hospitalization). Infection risk factors were assessed using logistic regression.

Results
One hundred thirty-two patients were identified (78% male; median age, 71 years). The most common indications for ibrutinib were chronic lymphocytic leukemia (67%) and mantle cell lymphoma (12%). Infection and serious infection occurred in 94 (71%) and 47 (36%) patients, respectively; when pneumonia was excluded as a criterion for serious infection, the serious infection rate was 27%. The median time from ibrutinib initiation to first infection was 125 days. Prior allogeneic hematopoietic stem cell transplantation (allo-HSCT) (odds ratio [OR], 4.60; 95% CI, 1.22-17.4) and corticosteroid use (OR, 5.55; 95% CI, 1.52-20.3) were significant risk factors for serious infection. IFIs were diagnosed in 7 patients (5%): 5 had Pneumocystis jirovecii pneumonia and 2 were infected with invasive molds.

Conclusion
Serious infection and IFI rates are high but similar to those previously described. Risk factors for serious infection included allo-HSCT and corticosteroid use. Targeted antimicrobial prophylaxis should be evaluated in prospective studies in patients on ibrutinib to reduce serious infections and IFI.