bluuebunny/crossref_metadata_2025_split huggingface dataset:
Millennial Learners’ Acceptance and Satisfaction of Blended Learning Environment
Authors: Abu Seman Sharidatul Akma , Hashim Maryam Jameelah , Mohd Roslin Rosmimah , Mohd Ishar Nor Irvoni 
Published: April 2020

Teaching in an era dominated by millennials represents a challenging task for educators in Institutes of Higher Learning (IHLs). One distinct feature in teaching millennials is the advancement in digital learning which has improved learning styles in higher education. Besides face-to-face interactions with the instructors, the blended learning approach has been introduced in many courses to cater to the needs of millennial learners. This study aims to provide an insight into on students’ acceptance and satisfaction towards the use of Learning Management System (LMS) in a blended learning environment. An online survey was administered to 167 respondents. The majority of the respondents are below 22 years of age and first-year students who are fresh and new to the blended learning concept. This study measured factors like technology experience, computer anxiety, service quality, system quality, information quality, course quality, and instructor to determine the students’ overall satisfaction. The model was analysed using the partial-least-squares structural modeling approach. The result shows that service quality, instructor quality, and course quality are among the critical factors towards students’ acceptance and satisfaction. Therefore, to ensure LMS’s effectiveness and students’ satisfaction, decision-makers at the higher institution should consider these factors before implementing a blended learning initiative via LMS as the platform.

KEYWORDS: Blended Learning, e-Learning, Higher Education, Learning Management System Millennial Learners
Evaluation of subcutaneously administered electrolyte solutions in experimentally dehydrated inland bearded dragons (Pogona vitticeps)
Authors: Parkinson Lily A. , Mans Christoph 
Published: April 2020

Abstract

OBJECTIVE
To evaluate the effects of 3 electrolyte solutions administered SC to experimentally dehydrated inland bearded dragons (Pogona vitticeps).

ANIMALS
9 inland bearded dragons.

PROCEDURES
In a randomized, complete crossover study, experimental dehydration was induced by means of furosemide (10 mg/kg, SC, q 12 h for 4 doses), and then lactated Ringer solution, Plasma-Lyte A, or reptile Ringer solution (RRS; 1:1 mixture of 5% dextrose solution and isotonic crystalloid solution) was administered SC in a single 50-mL/kg dose in 3 treatments sessions separated by a minimum of 14 days. Food and water were withheld during treatment sessions. Plasma biochemical values, PCV, blood total solids and lactate concentrations, and plasma osmolarity were measured prior to (baseline) and 4 and 24 hours after fluid administration.

RESULTS
Administration of RRS resulted in severe hyperglycemia (mean ± SD plasma glucose concentration, 420 ± 62 mg/dL), compared with baseline values (190 ± 32 mg/dL), and this hyperglycemia persisted for at least 24 hours. It also resulted in significant reductions in plasma osmolarity and sodium and phosphorus concentrations, which were not observed after administration of the other 2 solutions. Administration of lactated Ringer solution caused no significant increase in blood lactate concentration.

CONCLUSIONS AND CLINICAL RELEVANCE
The changes in plasma glucose, sodium, and phosphorus concentrations and plasma osmolarity observed after SC administration of a single dose of RRS suggested this type of electrolyte solution should not be used for rehydration of bearded dragons. Rather, lactated Ringer solution or Plasma-Lyte A should be considered instead.
On determining the undrained bearing capacity coefficients of variation for foundations embedded on spatially variable soil
Authors: Chwała Marcin 
Published: April 2020

Abstract
This paper presents an efficient method and its usage for the three-dimensional random bearing capacity evaluation for square and rectangular footings. One of the objectives of the study is to deliver graphs that can be used to easily estimate the approximated values of coefficients of variations of undrained bearing capacity. The numerical calculations were based on the proposed method that connects three-dimensional failure mechanism, simulated annealing optimization scheme and spatial averaging. The random field is used for describing the spatial variability of undrained shear strength. The proposed approach is in accordance with a constant covariance matrix concept, that results in a highly efficient tool for estimating the probabilistic characteristics of bearing capacity. As a result, numerous three-dimensional simulations were performed to create the graphs. The considered covariance matrix is a result of Vanmarcke’s spatial averaging discretization of a random field in the dissipation regions to the single random variables. The matrix describes mutual correlation between each dissipation region (or between those random variables). However, in the presented approach, the matrix was obtained for the expected value of undrained shear strength and keep constant during Monte Carlo simulations. The graphs were established in dimensionless coordinates that vary in the observable in practice ranges of parameters (i.e., values of fluctuation scales, foundation sizes and shapes). Examples of usage were given in the study to illustrate the application possibility of the graphs. Moreover, the comparison with the approach that uses individually determined covariance matrix is shown.
Isolation and characterization of cellulose from rice husk waste and sawdust with chemical method
Authors: ANDALIA RIZKI , RAHMI RAHMI , JULINAWATI JULINAWATI , HELWATI HIRA 
Published: April 2020

Cellulose had been isolated from rice husk waste and sawdust with chemical method through hydrolysis with HCl 2.5 N and bleaching process with H2O23%.The yields were 13,45% and 22,75% (w/w) of cellulose from rice husk waste and sawdust, respectively. The chemical treatment caused partial removal of lignin and hemicellulose from raw material showed by FTIR spectrum. Structure and morphology of cellulose from rice husk waste and sawdust were investigated using X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM). The XRD patterns showed cellulose structure converted from amorphous to crystalline form after bleaching process while SEM images showed that the isolated cellulose from rice husk waste had rougher surface than cellulose from sawdust. The SEM micrograph also showed that the isolated cellulose from rice husk was in the form of aggregates.
A futuristic study on in-vitro medical devices regulations
Authors: Naga Gouri T  , Venkatesh M P  , Balamuralidhara V  , Pramod Kumar T M  
Published: April 2020

The In-Vitro Medical Devices Directive (IVDD) established in 1998 by the European Union met the requirements of the single medical device market. In the due course, IVDD could not regulate all new technical and medical developments in the sector. The IVDD 98/79/EC, was preceded with IVDR 2017//746; which defined and demonstrated conformity to essential requirements, established harmonized standards and facilitated the organization of ‘Notified Body’ (NB), Competent Authority oversight and market surveillance. IVDR implemented streamlines as defined in Annex I of the EU IVDR 2017/746 conforming to the relationships between the performance requirements and general safety, and Annex I of the EU Directive 98/79/EC for IVDD for the essential requirements. The importance of the Unique Device Identification and its implementation in the safety and conformity of the device was made stringent for the manufacturers. The recent developments in IVDR, with reference to EUDAMED database, enable the applicant for accessing of data entered for the revival, correction and the assessing of information.
L' usage de l’objet dans la pratique autobiographique de Colette Fellous
Authors: Collington Tara 
Published: April 2020

La présente étude examinera la présence des objets dans deux textes de Collette Fellous,
Avenue de France (2001) et Un Amour de frère (2011), afin d’étudier leur rôle dans la pratique autobiographique de l’auteure. Fellous inclut souvent des matériaux extralittéraires dans ses textes. Le lecteur y trouve non seulement des photos de famille, mais aussi des lettres et des documents, ainsi que des images d’objets quotidiens aussi variés que des allumettes, des jouets d’enfant ou des chaussures. Il s’agit donc d’objets rendus visibles, car présents dans le texte sous forme de reproduction photographique. En même temps, son œuvre déborde d’objets invisibles qui sont décrits par le texte, mais qui n’y figurent que sous forme scripturale. Notre étude examinera donc les deux types d’objets, visibles et invisibles, afin de cerner le lien entre la mémoire et ce que Fellous appelle les « accessoires » du passé.

Mots-clés : Fellous, autobiographie, photographie, objets, mémoire
IDENTIFIKASI KESALAHAN MATEMATIKA SISWA SMP BERDASARKAN TAHAPAN KASTOLAN
Authors: Raharti Antonia Dwi , Yunianta Tri Nova Hasti 
Published: April 2020

The study aims to identify kinds of high school students’ misrepresent in doing their tasks and to provide the appropriate scaffolding as a solution to help the students. This is a qualitative descriptive research. The research subject consists of three junior high school students who have different abilities in Mathematics. They were selected out of 92 students. This research studied the conceptual errors, procedural mistakes, and students’ technical mistakes in working on the problems based on the stages of Kastolan mistakes and the scaffoldings given. Furthermore, the data were collected by using the way of testing, interviewing and documenting techniques. The research data were guarantee validated with the triangulation method. The result of the research showed that there were some errors done by the students in doing the tasks. They were the conceptual errors, procedural mistakes, and technical errors. The scaffoldings given to help the students do the tasks for Level 1 (environmental provisions), Level 2 (explaining, reviewing dan restructuring), and Level 3 (developing conceptual thinking).
Educación quirúrgica en Colombia en la era del COVID–19
Authors: Sánchez Ussa Sebastián , Ariza Gutiérrez Aníbal 
Published: April 2020

La enfermedad por Coronavirus-2 en poco tiempo ha logrado encender las alarmas de los sistemas de salud a nivel mundial. Además de las implicaciones económicas, sanitarias, políticas, culturales y sociales, está claro que ha cambiado la vida de los seres humanos incluyendo como se desarrollan los programas de postgrado en medicina.
Múltiples comunidades científicas alrededor del mundo han manifestado la necesidad de diferir los procedimientos quirúrgicos electivos y priorizar la atención de los pacientes por encima de la academia, lo que podría disminuir la exposición de residentes de cirugía general a actos quirúrgicos esenciales para su aprendizaje.
Como respuesta a ello, los autores presentan este artículo en donde se discute el papel de la educación virtual y la simulación como posibles respuestas a la dificultad educativa que representa la pandemia del COVID-19.
Efecto del envejecimiento sobre la capacidad reproductiva de Quercus suber en bosques maduros de espacios protegidos
Authors: Pardos Mínguez Marta , Madrigal Guillermo , Robledo Juan J , Climent José , Alía Ricardo , Montes Fernando , Camarero J. Julio , Rubio-Cuadrado Álvaro , Calama Rafael 
Published: April 2020

La disponibilidad de semilla y su viabilidad son procesos clave para la persistencia de los bosques maduros. Existen evidencias de que la senescencia en los árboles no disminuye la fecundidad en edades avanzadas, pero se desconoce si tiene efectos sobre la viabilidad de la progenie. Este trabajo analiza la influencia de la edad del árbol sobre los atributos biométricos de la semilla, la germinación y la emergencia en los bosques maduros de Quercus suber en los Parques Nacionales de Cabañeros y Monfragüe. En cada uno de los PPNN se seleccionaron 45-48 individuos de Quercus suber, entre jóvenes y senescentes, cubriéndose el rango de diámetros encontrados (24 a 100 cm en el PN de Cabañeros y 24 a 176 cm en el PN de Monfragüe). Se tomaron sus coordenadas y se midió su tamaño (diámetro, altura y diámetros de copa). Además, se estimó la edad a 1,30 m de altura (dbh) mediante la extracción de testigos de madera. En diciembre de 2018 se recogió toda la semilla presente en los individuos seleccionados, que no fue muy abundante debido a la marcada vecería en 2018. Se determinaron los caracteres biométricos de cada bellota (peso fresco, diámetro y longitud), analizándose el efecto de la edad del árbol, a través del dbh. Los resultados muestran el efecto del sitio, la edad del árbol y el tamaño de la bellota, tanto en la producción de semilla, como en su caracterización biométrica, germinación y emergencia, aunque la baja cosecha registrada en 2018 enmascara las diferencias esperadas.
Was sind (nachhaltige) E-Scooter überhaupt wert?
Authors: Gümüs Can , Schmidt David , Schneeweis Eric , Rose Fabian , Fritz Immanuel , Pfeifer Jannik , Schneider Maximilian , Setzer Morris 
Published: April 2020

Kurzfassung
Die vorliegende Arbeit beantwortet die Frage, ob eine Mehrzahlungsbereitschaft für nachhaltige E-Scooter-Konzepte besteht. Als Basis wurde eine Online-Umfrage an der Hochschule Reutlingen durchgeführt. Ziel dieser Umfrage war es, ein repräsentatives Meinungsbild als Basis für die Konzeptentwicklung zu erhalten. Dabei stellte sich heraus, dass die Mehrheit ein nachhaltiges Konzept befürwortet und dafür auch eine höhere Zahlungsbereitschaft besteht.
Cultural Dialectics With Catholic Education in The Border Areas in Sanggau Regency, West Kalimantan
Authors: Kristianus Kristianus , Magdalena Magdalena , Lala Carolina 
Published: April 2020

This research is backed by the condition of the community located in the border area of Indonesia-Malaysia especially in Entikong subdistrict of Sanggau Regency. As the frontier area of social and cultural life of community education in this region has always been a concern especially in conjunction with Malaysian Sarawak. The inhabitants of this region generally embraced Catholicism and Catholic missionaries establishing schools of KINDERGARTEN to high school which are equipped with dormitories. The problem in this study is how the Catholic religious education influences the dialectics of Dayak culture in the region. Data taken using qualitative method is by observation, interviews and living with the community there. The study was held in July-September 2018. The results concluded that the education developed by Catholic missionaries has an effect on the dialectics of Dayak culture in this area. Besides education, other factors also affect the history, politics, and daily life at the border. Another conclusion is that the Catholic missionary (the work of the education that has been developed) has an effect on the identity of Dayak culture in this region, Dayaks are more confident. This could be so because Catholic missionaries appreciate Dayak culture. It is clear that the education developed by the Catholic religion plays a role in the formation of basic and primary materials for the formation of Dayak cultural dialectics in Entikong and other border areas in West Kalimantan.
Evaluation of scattered radiation dose received by medical staff during uterine artery embolization in the operating room
Authors: Chiang Hsien-Wen , Chiang Hsien-Jen , Li Jung-Hui , Tsang Leo Leung-Chit 
Published: April 2020

BACKGROUND: The air kerma radiation doses have gained much attention since the operating room interventional radiology is a place where medical staff are exposed to a fluoroscopy environment and gain a cumulative dose during the uterine artery embolization procedure. OBJECTIVE: We aimed to evaluate the radiation dose received by medical staff by applying a flat X-ray machine in the surgical room during uterine artery embolization. METHODS: An ATOM humanoid model was laid on the operating table and simulated a patient. The scattered radiation dose received by the radiologist, anesthetist and radiologic technologist was evaluated. The scintillation detector was adopted. The measurement points were 50 cm, 100 cm and 150 cm above the floor, representing the limbs, abdomen and thyroid level, respectively. We compared the X-rays under different tube voltages of 70, 80, and 90, respectively and frames per second (FPS) of 30, 15, and 7.5, respectively. We configured the dose level per pulse of 40 nGy with a fixed detector. RESULTS: In Section 1, when the tube voltage was 70 kVp and 7.5 FPS, the average radiation doses of limbs, abdomen and thyroid level was 0.48, 1.3 and 1.9 [Formula: see text]Sv/min respectively. When the tube voltage was 80 kVp and the fluoroscopy decreases from 30 FPS to 7.5 FPS, 58% of the radiation dose was reduced. When the tube voltage was 90 kVp, the radiation dose in the lead garment increased 31–177% in comparison to when the tube voltage was 80 kVp. Sections 2 and 3 were far away from the central ray, so the highest radiation dose 100 cm above the floor were 0.05 and 0.02 [Formula: see text]Sv/min. CONCLUSIONS: Lead garment can effectively reduce medical staff from occupational doses with an average attenuation rate of 90%. 80 kVp was most commonly used. Fluoroscopy 7.5 FPS was used 100 cm above the floor in A section and the lowest radiation dose was 1.33 [Formula: see text]Sv/min. The operator should decrease the duration of X-rays or adopt suspended lead shielding to decrease the radiation dose received by the operator. When kVp increases, the penetration increases. Decreasing FPS cannot decrease occupational doses of medical staff.
Multi-target video-based face recognition and gesture recognition based on enhanced detection and multi-trajectory incremental learning
Authors: Lin Jirui , Xiao Laiyuan , Wu Tao 
Published: April 2020

BACKGROUND: Video-based face recognition (VFR) is one of the frontier topics in the domain of computer vision, which aims to automatically track and recognize facial regions of interests (ROIs) in video sequences. OBJECTIVE: In videos with multiple faces, the trajectories of individuals are incredibly complex. This is less studied than videos with a single face per frame. METHODS: In this paper, we present a multi-trajectory incremental learning (MTIL) algorithm, which categorizes trajectories using a Euclidean distance-based greedy algorithm and estimates the most likely labels for each trajectory by incremental learning to correct their classification and improve the accuracy of recognition. Furthermore, this study proposes an enhanced detection method that combines face detection with a robust tracking-learning-detection (TLD) algorithm to improve the performance of face detection in video. The method can also be extended for medical video recognition applications such as gesture recognition control based medical system. RESULTS: Experiments on Honda/UCSD and BMP (seq_mb) database demonstrate that our method can improve the face detection and face recognition (single or multiple) performance. The method also performs well on the gesture recognition system. CONCLUSION: The proposed MTIL algorithm can significantly improve the performance of the VFR system and the gesture recognition system.
Applied current thermoacoustic imaging for biological tissues
Authors: Yang Yanju , Xia Zhengwu , Xia Hui , Li Yanhong , Liu Guoqiang , Xu Jianhua 
Published: April 2020

BACKGROUND: The large differences of electrical characteristics can be used to reflect the physiological and pathological changes about biological tissues, and it can provide evidence for the early diagnosis and treatment of cancer in potential applications. OBJECTIVE: This paper describes a method called Applied Current Thermoacoustic Imaging (ACTAI) and explores the theory and demonstrates a low conductivity numerical simulation and fresh pork experimental studies. METHODS: In this paper, firstly, the principle of ACTAI is studied. In ACTAI, a target is applied with a microsecond width Gaussian pulse current. Then the target absorbs Joule heat and expands instantaneously, sending out thermoacoustic waves. The waves contain the conductivity information of the target. The waves received by sound transducers are processed by the time inversion method to reconstruct the sound source distribution of the target to illustrate the conductivity information of the target. Secondly, a square model with low conductivity was used as a target to conduct numerical simulation of ACTAI. Lastly, a fresh pork experiment study was conducted. RESULTS: The presented experimental results suggest that ACTAI can identify the conductivity changes information of the target with perfect imagery contrast and deep penetration. CONCLUSION: The ACTAI modality would benefit from the noncontact measurement and can be convenient for clinical application.
Assessment of mental workload based on multi-physiological signals
Authors: Fan Xiaoli , Zhao Chaoyi , Zhang Xin , Luo Hong , Zhang Wei 
Published: April 2020

BACKGROUND: Mental workload is one of the contributing factors to human errors in road accidents or other potentially adverse incidents. OBJECTIVE: This research probes the effects of mental workload on the electroencephalographic (EEG) and electrocardiogram (ECG) of subjects in visual monitoring tasks, based on which a comprehensive evaluation model for mental workload is established effectively. METHODS: Three degrees of mental workload were obtained by monitoring tasks with different levels of difficulty. 20 healthy subjects were selected to take part in the research. RESULTS: The subjective scores showed a significant increase with the increase of task difficulty, meanwhile the reaction time (RT) increased and the accuracy decreased significantly, which proved the validity of three degrees of mental workload induced. For the EEG parameters, a significant decrease of [Formula: see text] energy was found in Frontal, Parietal and Occipital with the increase of level of mental workload, as well as a significant decrease of [Formula: see text] energy in Frontal, Central and Occipital, meanwhile a significant increase of [Formula: see text] energy occurred in Frontal and Occipital. There was a significant decrease of [Formula: see text]/[Formula: see text] in Occipital, and significant increases of [Formula: see text]/[Formula: see text] and ([Formula: see text] in Frontal, Central and Occipital, meanwhile ([Formula: see text] and WPE decreased significantly in Frontal and Occipital. Among the ECG parameters, it was shown that Mean RR, RMSSD, HF_norm and SampEn decreased significantly with the increase of task difficulty, while LF_norm and LF/HF showed significant increases. These EEG indictors in Occipital and ECG indictors were chosen and constituted a multidimensional original sample. Principal Component Analysis (PCA) was used to extract the principal elements and decreased the dimension of sample space in order to simplify the calculation, based on which an effective classification model with accuracy of 80% was achieved by support vector machine (SVM). CONCLUSION: This study demonstrates that the proposed algorithm can be applied to mental workload monitoring.