bluuebunny/crossref_metadata_2025_split huggingface dataset:
Dampak Pembelajaran Daring Selama Pandemi Covid-19 terhadap Psikologis Mahasiswa Keperawatan
Authors: Naibaho Jassica Friscillia 
Published: February 2022

Pembelajaran daring yang dilaksanakan selama masa pandemi pada semua tingkat pendidikan banyak menyebabkan adanya dampak psikologis yang terjadi termasuk pada golongan mahasiswa. Artikel ini membahas tentang dampak psikologis yang terjadi pada mahasiswa keperawatan Universitas Advent Indonesia dalam mengikuti pembelajar daring dimasa pandemi covid 19. Penelitian ini bertujuan untuk mengetahui dampak psikologis apa yang terjadi terhadap mahasiswa yang mengikuti pembelajaran daring, agar pembelajaran daring ini tetap efektif dan tujuan pembelajarannya tersampaikan. Kajian ini menggunakan metode kualitatif dengan menggunakan metode koesioner DASS-21 dan dibagikan kepada responden dalam bentuk google form. Responden dalam penelitian ini adalah mahasiswa keperawatan Universitas Advent Indonesia. Hasil penelitian menunjukan bahwa: Dalam masa pembelajaran daring ini terdapat adanya dampak psikologis yang terjadi ialah perubahan stress yaitu kecemasan yang terjadi dengan nilai 9,80% yang berarti berada pada tingkat kecemasan ringan.
Intersectional Analysis of Chinese International Students’ Experiences in Post-Secondary Institutions in British Columbia
Authors: Avenido Karlo 
Published: February 2022

Internationalization continues to be a priority of the education mandate in British Columbia (BC). While there is currently a surfeit of exploratory studies on international students’ (IS) experiences of challenges in their host institutions, little research has been done on examining their experiences from sociocultural context-based standpoints. This study fills the gap by examining the daily lived experiences of Chinese post-secondary IS in BC through the lens of intersectionality. First, the notions of cultural distance, nationality, and language proficiency were conceptualized as intersectional categories. Next, narrative data were collected from six Chinese IS, and then analyzed through an iterative coding framework that connected narrative themes to the theoretical framework of intersectionality. The results show how the interlocking categories created instances of minoritization among the participants due to power imbalances brought upon by compatriots, peers, and federal/institutional policies. Implications in future directions of intersectionality research, policy, and practices are presented.
Permeability of High-Performance Fiber Reinforced Concrete Immersed in High Concentration Sodium Chloride Solution
Authors: Chalah Lyes , Talah Aissa 
Published: February 2022

This paper aims to study the permeability of High-Performance Concrete containing natural pozzolan and reinforced with fibers in high concentration sodium chloride solution. Optimized finely ground natural pozzolan was employed as 6% of partial substitution of the cement. Polypropylene fibers with 6 mm and 12 mm lengths were introduced individually for a volume fraction of 0.1% and 0.15% respectively. Then, in combination with a total fiber content of 0.25%. The effect of sodium chloride attack on the performance of concretes was assessed through the measurement of the compressive strength, splitting tensile strength, sorptivity, rapid chloride permeability test, apparent and intrinsic gas permeability, and visual inspection at various testing ages (28, 90, 180, and 365 days). A total of four (04) types of concretes were cast: one (01) High-Performance Concrete (HPC), and three (03) High-Performance Fiber Reinforced Concrete (HPFRC) stored in tap water and sodium chloride environment. From the experiments performed, it can be concluded that the polypropylene fibers introduction into HPC favorably affect its chemical resistance to chloride attack and long-term durability. The difference in the permeability of HPC and HPFRC stored in tap water and chloride environment is not significant. Furthermore, the visual investigation of HPFRC after 365 days of immersion in sodium chloride environment showed no sign of degradation. Based on the results obtained in this study, we recommend the use of hybrid fiber-reinforced concrete (F0-0.25%) as a low permeable material in a severe chloride environment.
Herramienta de gestión en los procesos administrativos del GAD - La Maná
Authors: Almachi Cajas Klever Xavier , Cañar Tercero Jorge Enrique , Vergara Brito Johnny Xavier , Reyes Moreira Tamara Victoria 
Published: February 2022

Introducción: es notorio que los avances tecnológicos cada vez son más frecuentes, esto se evidencia con el desarrollo de nuevas aplicaciones que generan bienestar y contribuyen de manera positiva en las actividades que se desarrollan en las organizaciones a nivel mundial, en este contexto la presente investigación se centra como objetivo principal el desarrollar herramientas de gestión de procesos administrativos, La investigación de la desarrolló mediante un enfoque cuantitativo, y cualitativo de nivel descriptivo, como técnicas se aplicaron encuestas y entrevistas validadas por expertos en las áreas afines. La población objeto de estudio correspondió al personal administrativo del GAD-La Maná y a los habitantes del mismo cantón. Entre los resultados destacados se puede mencionar que fue necesario la implementación de esta herramienta de gestión de procesos ya que anteriormente se lo desarrollaba manualmente generando perdida de recursos como tiempo, dinero e información, el sistema posee una base de datos segura y confiable que permite reducir los tiempos de respuesta, reemplazar el trabajo manual y generar documentos de respaldo, gracias a las prestaciones de búsqueda, el sistema otorga una medida eficiente de almacenamiento, distribución por bloques, ingresar y actualizar datos, consultar y localizar todo tipo de información, además cuenta con una interfaz gráfica amigable con el usuario.
Two Stay Two Stray Strategy on the Students’ Reading Comprehension: The Effectiveness and the Students’ Perspectives
Authors: Haryati Haryati 
Published: February 2022

This study was aimed to find out the effectiveness of using Two Stay Two Stray (TSTS) strategy on the students' reading comprehension achievement of the first semester students of English department at Universitas Pamulang, and to know the students’ perspective in applying TSTS. A quantitative approach was conducted in this research by applying Independent T-test calculation. To obtain the data, the writers selected the sample comprised 60 students (30 students in experimental class and 30 students in control class) by having random sampling. The experimental class was taught by using Two Stay Two Stray (TSTS) strategy and the control class was taught by using conventional method. To collect the data, the writers used two kinds of instruments: a reading test and a questionnaire. These instruments were administered to answer stated research questions. A reading test was used to find out the effectiveness of TSTS strategy by SPSS calculation, and the questionnaire was distributed to find out the students’ perspectives in applying TSTS in reading activity. The research findings indicated the result of hypothesis based on Mann-Whitney U test the Sig 2-tailed value 0.019 < 0.05 which means that the Null Hypothesis (H0) is rejected and Alternative Hypothesis (Ha) is accepted. Therefore, it can be inferred that the Two Stay Two Stray (TSTS) strategy has effectiveness in learning reading comprehension of the students. Furthermore, students assume that Two Stay Two Stray (TSTS) strategy is more enjoyable than the previous strategy (7.7%), they guess the main ideas of the text on the basis of pictures, charts or figures (7,4), and they understand my reading comprehension text before straying to another group (7.3%). Therefore, it shows the Two Stay Two Stray strategy shares the beneficial encouragement on the students reading comprehension.
Development of Bioactive Glass-Collagen-Hyaluronic Acid-Polycaprolactone Scaffolds for Tissue Engineering Applications
Authors: Zurita-Méndez N. N. , Carbajal-De la Torre G. , Flores-Merino M. V. , Espinosa-Medina M. A. 
Published: February 2022

In this work, bioactive glass (BG) particles synthesized by a sol-gel method, hyaluronic acid (HYA) and collagen (COL) extracted from chicken eggshell membrane (ESM), and as-purchased polycaprolactone (PCL) were used to obtain a novel bioactive scaffold using the gel-pressing technique. Two composite mixtures in weight percent were obtained and identified as SCF-1 and SCF-2, and were characterized by using FTIR, XRD, and SEM techniques. Subsequently, the composite materials applied as coatings were evaluated in simulated body fluid solutions using electrochemical techniques. The results of bioactivity and biodegradability evaluations, carried out by immersing in simulated body fluid and phosphate-buffered saline solution, showed that the SCF-1 sample presented the best biocompatibility. In accordance with the potentiodynamic results, the 316L-SS and the SCF-1-coated SS showed a very similar corrosion potential (Ecorr), around −228 mV, and current density (icorr) values in close proximity, while the SCF-2-coated SS showed more positive Ecorr around −68 mV and lower icorr value in one order of magnitude. These results agree with those obtained by electrochemical impedance spectroscopy, which show a corrosion mechanism governed by activation and finite diffusion through the porous layer. In addition, results were complemented by dynamic compression testing under oscillating forces to identify the developed scaffolds’ response under external forces, where the SCF-1 scaffold presented a maximum compression. The degradation resistance, bioactivity, and mechanically obtained measurements provided interesting results for potential further studies in tissue engineering.
Enantioselective Biosynthesis of L-Phenyllactic Acid From Phenylpyruvic Acid In Vitro by L-Lactate Dehydrogenase Coupling With Glucose Dehydrogenase
Authors: Zhang Dong , Zhang Ting , Lei Yuqing , Lin Wenqian , Chen Xingyi , Wu Minchen 
Published: February 2022

As a valuable versatile building block, L-phenyllactic acid (L-PLA) has numerous applications in the fields of agriculture, pharmaceuticals, and biodegradable plastics. However, both normally chemically synthesized and naturally occurring PLA are racemic, and the production titer of L-PLA is not satisfactory. To improve L-PLA production and reduce the high cost of NADH, an in vitro coenzyme regeneration system of NADH was achieved using the glucose dehydrogenase variant LsGDHD255C and introduced into the L-PLA production process. Here an NADH-dependent L-lactate dehydrogenase-encoding variant gene (L-Lcldh1Q88A/I229A) was expressed in Pichia pastoris GS115. The specific activity of L-LcLDH1Q88A/I229A (Pp) was as high as 447.6 U/mg at the optimum temperature and pH of 40°C and 5.0, which was 38.26-fold higher than that of wild-type L-LcLDH1 (Pp). The catalytic efficiency (kcat/Km) of L-LcLDH1Q88A/I229A (Pp) was 94.3 mM−1 s−1, which was 67.4- and 25.5-fold higher than that of L-LcLDH1(Pp) and L-LcLDH1Q88A/I229A (Ec) expressed in Escherichia coli, respectively. Optimum reactions of L-PLA production by dual-enzyme catalysis were at 40°C and pH 5.0 with 10.0 U/ml L-LcLDH1Q88A/I229A (Pp) and 4.0 U/ml LsGDHD255C. Using 0.1 mM NAD+, 400 mM (65.66 g/L) phenylpyruvic acid was completely hydrolyzed by fed-batch process within 6 h, affording L-PLA with 90.0% yield and over 99.9% eep. This work would be a promising technical strategy for the preparation of L-PLA at an industrial scale.
High Temperature Disrupts Organelle Distribution and Functions Affecting Meiotic Maturation in Porcine Oocytes
Authors: Lee Song-Hee , Sun Ming-Hong , Zhou Dongjie , Jiang Wen-Jie , Li Xiao-Han , Heo Geun , Cui Xiang-Shun 
Published: February 2022

Heat stress (HS) has been known to cause reproductive failure in animals, especially in summer. HS severely affects the developmental potential of oocytes and leads to low fertility rates. Previous studies have reported that HS compromises embryo development in bovine oocytes, and reduces ovarian development in mice, thereby impairing reproductive function in animals. However, the effect of high temperature (HT) on the organelles of porcine oocytes is unknown. In this study, we reported that exposure to HT for 24 h (41°C) significantly decreased meiotic maturation in porcine oocytes (p &lt; 0.05). Further experiments on organelles found that HT induced mitochondrial dysfunction, increased abnormal mitochondrial distribution, and decreased mitochondrial membrane potential (MMP). We also found that HT induced abnormal endoplasmic reticulum (ER) distribution and higher expression of glucose regulatory protein 78 (GRP78), suggesting that HT exposure induces ER stress. Our results also indicated that exposure to HT induced abnormal distribution and dysfunction of the Golgi apparatus, which resulted from a decrease in the expression of the vesicle transporter, Ras-related protein Rab-11A (RAB11A). In addition, we found that HT exposure led to lysosomal damage by increasing the expression of lysosome-associated membrane protein 2 (LAMP2) and microtubule-associated protein 1A/1B-light chain 3 (LC3). In summary, our study revealed that HT exposure disrupts organelle dynamics, which further leads to the failure of meiotic maturation in porcine oocytes.
Investigating Anzali Wetland Sediment Estimation Using the MPSIAC Model
Authors: Khalili Vavdareh Sohrab , Shahnazari Ali , Sarraf Amirpouya 
Published: February 2022

The adverse effects of upland erosion impact the Anzali Wetland in Iran. The Modified Pacific South-west Inter Agency Committee model (MPSIAC) was used to estimate the sediment yield in the watershed. The watershed was divided into twelve sub-watersheds based on the geomorphologic features and waterway orientations (Sw0-Sw11). To investigate the effect of different factors on erosion and sedimentation, data were digitized using ArcGIS software. The effective factor weights were determined using the MPSIAC model, and the total sediment yield was calculated for each sub-watershed. Results showed that the amount of particulate sediment in the critical sub-watersheds Sw6and Sw9was 777.9 and 730.2 t km−2. yr−1, respectively. Based on erosion and sedimentation results, the sub-watershed erosion was prioritized as Sw6&gt; Sw9&gt; Sw4&gt; Sw1&gt; Sw0&gt; Sw5&gt; Sw2&gt; Sw8&gt; Sw3&gt; Sw11&gt; Sw7&gt; Sw10. Both model inputs (precipitation) and outputs (sediment) at different parts of the watershed were assessedviapoint observations data. Comparison of correlation values reveals that the correlation between the simulated and sampling values was strong in sub-watershed 1 (R2&lt; 0.8). EF, RMSE, nRMSE, CRM, and MAE were 0.23, 16.74 tons per year, 5.05%, 0.55, and −3.6, respectively, which indicates the model’s high performance in Sw0. Areas with insufficient cover and bare soil showed a high correlation with the final erosion model. Thus, land-use classes, such as dense vegetation and good pastures, correspond to areas with low erosion. Conversely, bare soils and poor pastures were located on the eroded flats.
Identification of Hazardous Glacial Lakes in the Yarlung Zangbo River Basin Based on Lakes Changes Determined Using Google Earth Engine
Authors: Sun Xiaodong , Cao Bo , Pan Baotian , Li Kaiji , Zhao Xuanru , Guan Weijin 
Published: February 2022

Glaciers have melted rapidly in the Yarlung Zangbo River Basin due to recent climate change, which has accelerated the expansion of glacial lakes. We performed a systematic survey of glacial lakes in the Yarlung Zangbo River Basin using the Google Earth Engine platform. This allowed us to map the distribution and monitor the evolution of glacial lakes over seven time periods from 1990 to 2020, using more than 140 Landsat Thematic Mapper and Operational Land Imager images at a 30-m resolution. The results show that there were 2088 glacial lakes in 2020, with a total area of 245.87 km2, mainly distributed at elevations of 3,800–5,800 m above sea level. From 1990 to 2020, the Yarlung Zangbo River Basin glacial lakes expanded by approximately 1.81 km2·a−1. A total of 153 glacial lakes in the Yarlung Zangbo River Basin were assessed. The assessment shows that 153 glacial lakes were divided into very high, high, medium, low, and very low level. The number of glacial lakes in each level is 23, 22, 32, 32, and 44, respectively. The very high and high level glacial lakes were mainly found in the Yi’ong Zangbo River Basin, Parlung Zangbo River Basin, the western of the Yarlung Zangbo River Basin and Nianchu River Basin. These glacial lakes deserve further attention and monitoring.
Characteristics of Stress Field and Damage Law of Coal Rock in Residual Pillar of Top Slice and Its Application
Authors: Wu Fengfeng , Yu Xin , Zhao Gaoliang , Du Beiju , Lv Bo , Zhang Jian 
Published: February 2022

This article presents a theoretical analysis and numerical simulation studies to determine the suitable position for the lower slice roadway in a residual pillar area after top slicing a thick coal seam. We considered the load concentration on the coal pillar, the goaf floor, and the stress distribution characteristics of the coal pillar area before and after the top slice. With a mechanical model built of the residual pillar load propagation in the floor and the failure model of the floor surrounding rock, the analytical formula we deduced for the coal pillar floor stress and the expression of the floor failure depth of the roadway provides a basis for the reasonable determination of the position of the lower slicing roadway. Studies proved that after mining the top slice working face, the floor stress field of the residual pillar area presented characteristics of the non-uniform distribution. The stress concentration occurred below the coal pillar. The stress variation area appeared at the edge of the coal pillar, with a stable stress area appearing far away from the coal pillar area. Therefore, the roadway layout should avoid the areas below the coal pillar and the coal pillar edge with high stress levels and a large stress variation gradient. High stress concentration formed on the coal pillar transferred to the lower layered coal and floor strata, and decreased the stress concentrations layer by layer. However, mining of the top-layered working face affected the coal, and rock mass damaged the coal pillar floor area and weakened the mechanical properties, which was not conducive to the control of the roadway surrounding rock. The research results applied to No. 30117 working face of the lower slice of the Shancheng Coal Industry, and the proper position of the return airway of the working face was determined to be 8 m outside the east side of the residual pillar in the top slice, achieving a good surrounding rock control effect.
All-in-Memory Brain-Inspired Computing Using FeFET Synapses
Authors: Thomann Simon , Nguyen Hong L. G. , Genssler Paul R. , Amrouch Hussam 
Published: February 2022

The separation of computing units and memory in the computer architecture mandates energy-intensive data transfers creating the von Neumann bottleneck. This bottleneck is exposed at the application level by the steady growth of IoT and data-centric deep learning algorithms demanding extraordinary throughput. On the hardware level, analog Processing-in-Memory (PiM) schemes are used to build platforms that eliminate the compute-memory gap to overcome the von Neumann bottleneck. PiM can be efficiently implemented with ferroelectric transistors (FeFET), an emerging non-volatile memory technology. However, PiM and FeFET are heavily impacted by process variation, especially in sub 14 nm technology nodes, reducing the reliability and thus inducing errors. Brain-inspired Hyperdimensional Computing (HDC) is robust against such errors. Further, it is able to learn from very little data cutting energy-intensive transfers. Hence, HDC, in combination with PiM, tackles the von Neumann bottleneck at both levels. Nevertheless, the analog nature of PiM schemes necessitates the conversion of results to digital, which is often not considered. Yet, the conversion introduces large overheads and diminishes the PiM efficiency. In this paper, we propose an all-in-memory scheme performing computation and conversion at once, utilizing programmable FeFET synapses to build the comparator used for the conversion. Our experimental setup is first calibrated against Intel 14 nm FinFET technology for both transistor electrical characteristics and variability. Then, a physics-based model of ferroelectric is included to realize the Fe-FinFETs. Using this setup, we analyze the circuit’s susceptibility to process variation, derive a comprehensive error probability model, and inject it into the inference algorithm of HDC. The robustness of HDC against noise and errors is able to withstand the high error probabilities with a loss of merely 0.3% inference accuracy.
Microvascular Permeability and Texture Analysis of the Skeletal Muscle of Diabetic Rabbits With Critical Limb Ischaemia Based on DCE-MRI
Authors: Yang Qi , Li Liang , Zha Yunfei , Yan Yuchen , Xing Dong , Liu Huan , Yang Liu , Peng Lin , Zhang Yubiao 
Published: February 2022

BackgroundWe evaluated skeletal muscle vascular permeability in diabetic rabbits with critical limb ischaemia using quantitative dynamic contrast agent-enhanced (DCE) magnetic resonance imaging (MRI) and explored the feasibility of using DCE-MRI Ktrans-based texture analysis for assessing early slight ischaemia-related skeletal muscle structural changes.MethodTwenty-four male New Zealand white rabbits (2.7 ± 0.3 kg; n = 12 each in sham-operated and experimental groups) underwent axial MRI of the vastus lateralis muscle at 1, 2, and 3 weeks after alloxan injection. Between-group and intra-group postoperative permeability and texture parameters were compared. Texture features of experimental groups in the third week were modelled by receiver operating characteristic (ROC) curve analysis. Correlations of permeability and of statistical texture parameters with peripheral blood endothelial progenitor cells (EPCs) and microvascular density (MVD) were analysed.ResultsIn the experimental group, the transfer constant (Ktrans) was statistically significant at all time-points (F = 5.800, P = 0.009). Their vastus lateralis muscle Ktrans was significantly lower in the third than in the first week (P = 0.018) and correlated positively with peripheral blood EPCs in the experimental group [r = 0.598, (95% CI: 0.256, 0.807)]. The rate constant was negatively associated with vastus lateralis muscle MVD [r = -0.410, (95% CI: -0.698, -0.008)]. The area under the ROC curve of texture parameters based on Ktrans in ischaemic limbs was 0.882.ConclusionsQuantitative DCE-MRI parameters could evaluate microvascular permeability of ischaemic limb skeletal muscle, and texture analysis based on DCE-MRI Ktrans allowed evaluation of early slight skeletal muscle structural changes.