bluuebunny/crossref_metadata_2025 huggingface dataset:
Follow-up Observations of the Prolonged, Super-Eddington, Tidal Disruption Event Candidate 3XMM J150052.0+015452: the Slow Decline Continues
Authors: Lin Dacheng , Godet Olivier , Webb Natalie A. , Barret Didier , Irwin Jimmy A. , Komossa S. , Ramirez-Ruiz Enrico , Maksym W. Peter , Grupe Dirk , Carrasco Eleazar R.
Published: January 2022

The X-ray source 3XMM J150052.0+015452 was discovered as a spectacular tidal disruption event candidate during a prolonged (>11 yr) outburst. It exhibited unique quasi-soft X-ray spectra of characteristic temperature kT ∼ 0.3 keV for several years at the peak, but in a recent Chandra observation (10 yr into the outburst) a super-soft X-ray spectrum of kT ∼ 0.15 keV was detected. Such dramatic spectral softening could signal the transition from the super-Eddington to thermal state or the temporary presence of a warm absorber. Here we report on our study of four new XMM-Newton follow-up observations of the source. We found that they all showed super-soft spectra, suggesting that the source had remained super-soft for >5 yr. Then its spectral change is best explained as due to the super-Eddington to thermal spectral state transition. The fits to the thermal-state spectra suggested a smaller absorption toward the source than that obtained in Lin et al. This led us to update the modeling of the event as due to the disruption of a 0.75 M
⊙ star by a massive black hole of a few × 105
M
⊙. We also obtained two HST images in the F606W and F814W filters and found that the dwarf star-forming host galaxy can be resolved into a dominant disk and a smaller bulge. No central point source was clearly seen in either filter, ruling out strong optical emission associated with the X-ray activity.
Bursting Bubbles: Clustered Supernova Feedback in Local and High-redshift Galaxies
Authors: Orr Matthew E. , Fielding Drummond B. , Hayward Christopher C. , Burkhart Blakesley
Published: January 2022

We compare an analytic model for the evolution of supernova-driven superbubbles with observations of local and high-redshift galaxies, and the properties of intact H i shells in local star-forming galaxies. Our model correctly predicts the presence of superwinds in local star-forming galaxies (e.g., NGC 253) and the ubiquity of outflows near z ∼ 2. We find that high-redshift galaxies may “capture” 20%–50% of their feedback momentum in the dense ISM (with the remainder escaping into the nearby CGM), whereas local galaxies may contain ≲10% of their feedback momentum from the central starburst. Using azimuthally averaged galaxy properties, we predict that most superbubbles stall and fragment within the ISM, and that this occurs at, or near, the gas scale height. We find a consistent interpretation in the observed H i bubble radii and velocities, and predict that most will fragment within the ISM, and that those able to break out originate from short dynamical time regions (where the dynamical time is shorter than feedback timescales). Additionally, we demonstrate that models with constant star cluster formation efficiency per Toomre mass are inconsistent with the occurrence of outflows from high-z starbursts and local circumnuclear regions.
Estimation of the Number of Stellar Encounters on a Cross-sectional Area containing a Planetary Disk in Birth Clusters of Stars
Authors: Jiménez-Torres Juan J.
Published: January 2022

In this work, I estimate the number of close stellar encounters on a specific cross-sectional area that may contain a planetary disk in a crowded star formation cluster. The approximation employs Monte Carlo runs to estimate the most likely value of the number of encounters as a function of stellar densities from 1.6 × 105 to 6.2 × 105 pc−3, velocity dispersions from 0.7 to 1.5 km s−1, and the lifetime of a typical star formation environment. I found that the most likely number of encounters on cross-sectional areas with a radius of 400 au goes from one to three. Although, four encounters are also likely to happen. This means that multiple strong stellar could happen on planetary disks in the early epoch of the star formation clusters.
Reduction of nosocomial infections in the intensive care unit using an electronic hand hygiene compliance monitoring system
Authors: Akkoc Gulsen , Soysal Ahmet , Gul Fethi , Kepenekli Kadayifci Eda , Arslantas Mustafa Kemal , Yakut Nurhayat , Bilgili Beliz , Ocal Demir Sevliya , Haliloglu Murat , Kasapoglu Umut , Cinel Ismail
Published: January 2022

Introduction: Healthcare-associated infection is an important cause of mortality and morbidity worldwide. Well-regulated infection control and hand hygiene are the most effective methods for preventing healthcare-associated infections. This study evaluated and compared conventional hand hygiene observation and an electronic hand-hygiene recording and reminder system for preventing healthcare-associated infections.

Methodology: This pre- and post-intervention study, employed an electronic hand-hygiene recording and reminder system for preventing healthcare-associated infections at a tertiary referral center. Healthcare-associated infection surveillance was recorded in an anesthesia and reanimation intensive care unit from April 2016 to August 2016. Hand-hygiene compliance was observed by conventional observation and an electronic recording and reminder system in two consecutive 2-month periods. healthcare-associated infections were calculated as incidence rate ratios.

Results: The rate of healthcare-associated infections in the electronic hand- hygiene recording and reminder system period was significantly decreased compared with that in the conventional hand-hygiene observation period (incidence rate ratio = 0.58; 95% confident interval = 0.33-0.98). Additionally, the rate of central line-associated bloodstream infections and the rate of ventilator-associated pneumonia were lower during the electronic hand hygiene recording and reminder system period (incidence rate ratio= 0.41; 95% confident interval = 0.11-1.30 and incidence rate ratio = 0.67; 95% confident interval = 0.30-1.45, respectively).

Conclusions: After implementing the electronic hand hygiene recording and reminder system, we observed a significant decrease in healthcare-associated infections and invasive device-associated infections. These results were encouraging and suggested that electronic hand hygiene reminder and recording systems may reduce some types of healthcare-associated infections in healthcare settings.
Methicillin-resistant Staphylococcus aureus in a Turkish hospital: characterization of clonal types and antibiotic susceptibility
Authors: Güngör Serdar , Karagöz Alper , Koçak Nadir , Arslantaş Tutku
Published: January 2022

Introduction: The assessment of the clonal spread of methicillin resistant Staphylococcus aureus (MRSA) in nosocomial and community-acquired infections through characterization of the isolates is critical for tracking the evolution of the epidemics, implementing effective control measures, and preventing future outbreaks of MRSA. In this context, it is aimed with this study to determine the clonal relationships between the S. aureus isolates obtained from the patients receiving treatment in the intensive-care units of a state hospital in Turkey.

Methodology: A total of 80 MRSA isolates obtained from the patients receiving treatment in three different intensive-care units were analyzed for their antibiotic susceptibilities, pulsed-field gel electrophoresis profiles, and multilocus sequence types.

Results: The dendrogram of the pulsed-field gel electrophoresis profiles revealed two major pulsed-field gel electrophoresis pulsotypes: A and B, which were further divided into two (A1 and A2) and four (B1-B4) subgroups, respectively. Multilocus sequence typeanalysis indicated that all isolates belonged to a single MRSA clone, sequence type 239. No significant difference was found between the antibiotic sensitivity profiles of strains isolated from different intensive-care units. All of the strains were sensitive to linezolid and vancomycin.

Conclusions: It was concluded that the MRSA strains isolated from the patients receiving treatment at the intensive-care units of the hospital constituted two major pulse-field types and belonged to the ST239 lineage, one of the most extensively distributed MRSA lineages throughout the world.
Angiostrongylosis meningomyelitis without blood eosinophilia
Authors: Amornpojnimman Thanyalak , Sanghan Nuttha , Ekpitakdamrong Nichanan , Koonalinthip Prut , Leelawai Sumonthip , Sathirapanya Pornchai
Published: January 2022

Angiostrongylus cantonensis and Gnathostoma spinigerum usually cause eosinophilic meningitis with associated peripheral blood eosinophilia. A 44-year-old man developed acute paraplegia with bowel and bladder dysfunction. Spinal magnetic resonance images showed a long T2W hyperintensity signal from the 1st to 8th spinal thoracic level. Cerebrospinal fluid analysis revealed eosinophilia and elevated cerebrospinal fluid protein, whereas differential leucocytes count in peripheral blood was unremarkable. Positive immunoblot tests for A. cantonensis antibody in serum and cerebrospinal fluid were reported. The patient had neither history of recent traveling to the high endemic areas of the parasite in Thailand, nor consumption the parasitic hosts. Immediate treatment with intravenous pulse methylprednisolone and oral albendazole resulted in complete recovery. Despite an unremarkable differential leucocytes count, absence a history of parasitic hosts consumption, and a less common presentation with meningomyelitis, A. cantonensis should be considered when cerebrospinal fluid eosinophilia presents.
COVID-19 in Malaysia: exposure assessment and prevention practices among healthcare workers at a teaching hospital
Authors: Muhammad Azami Nor Azila , Abdul Murad Nor Azian , Mohammed Nawi Azmawati , Salleh Sharifah Azura , Periyasamy Petrick , Kori Najma , Hasan Mohd Rohaizat , Ahmad Norfazilah , Sulong Anita , Othman Hanita , Mohd Don Tuti Ningseh , Ab Mutalib Nurul Syakima , Mohamad Hanif Ezanee Azlina , Sulaiman Siti Aishah , Zulkiflee Nurul Syeefa' , Abdul Kader Abdul Rashid , Abdul Gafor Abdul Halim , Rashid Hanafiah Haruna , Jamal Rahman
Published: January 2022

Introduction: During the second wave of the coronavirus disease 19 (COVID-19) pandemic, Malaysia reported several COVID-19 clusters related to healthcare workers. Thus, addressing and understanding the risk of exposure in healthcare workers is important to prevent future infection and reduce secondary COVID-19 transmission within the healthcare settings. In this study, we aim to assess exposure and prevention practices against COVID-19 among healthcare workers at the Hospital Canselor Tuanku Muhriz, a university teaching hospital based in Kuala Lumpur, Malaysia.

Methodology: A total of 571 healthcare workers at COVID-19 and non-COVID-19 wards as well as the emergency department and laboratory staff at COVID-19 testing labs were recruited. The presence of novel human coronavirus (SARS-CoV-2) and IgM/IgG antibodies were confirmed in all healthcare workers. The healthcare workers responded to an online Google Forms questionnaire that evaluates demographic information and comorbidities, exposure and adherence to infection prevention and control measures against COVID-19. Descriptive analysis was performed using Statistical Package for the Social Sciences 24.0.

Results: Three healthcare workers (0.5%) tested positive for SAR-CoV-2, while the remaining 568 (99.5%) were negative. All were negative for IgM and IgG antibodies during recruitment (day 1) and follow-up (day 15). More than 90% of the healthcare workers followed infection prevention and control practices recommendations regardless of whether they have been exposed to occupational risk for COVID-19.

Conclusions: The healthcare workers’ high level of adherence to infection prevention practices at this hospital helped reduce and minimize their occupational exposure to COVID-19.
Lung Fibrosis due to Coronavirus Disease 2019 Pneumonia with Critical Symptoms: A Case Report
Authors: Sinaga Bintang Yinke Magdalena , Tarigan Agi Hidjri
Published: January 2022

BACKGROUND: The pandemic that occurred at the end of 2019 was caused by the coronavirus 2 (Severe acute respiratory syndrome coronavirus 2 [SARS-CoV-2]). Various speculations mention that the long-term effects of coronavirus disease 2019 (COVID-19) infection can cause pulmonary fibrosis. Acute respiratory distress syndrome (ARDS) is one that can cause pulmonary fibrosis due to injury to the lungs.
CASE REPORT: This report discusses a case of pulmonary fibrosis caused by critical COVID-19 (Coronavirus disease) in 38-year-old male patient with hypertension and obesity comorbidities. The patient was treated for 51 days in intensive care unit with 60 L/min high flow nasal cannula assisted oxygenation; then his condition improved as evidenced by his negative Real Time - Polymerase Chain Reaction test result, and was subsequently transferred to a non-COVID-19 ward using non-rebreathing mask at 10–15 L/min, which was later titrated to 2–4 L/min nasal canulla. Patient was treated in the non-COVID ward for 16 days. The total number of days of hospitalization was 67 days. Patient had his thorax photo taken 3 times and non-contrast thorax computed tomography (CT) scan 3 times. Based on the evaluation of his thorax CT scan on day 23, we found a vast fibrosis in patient’s lungs. Many literatures state that lung fibrosis can be triggered by ARDS, a condition due to the infection from SARS-CoV-2.
CONCLUSION: COVID-19 infection can progress overtime and may cause pulmonary fibrosis. The most serious phase of this virus infection is characterized by sudden and excessive release of proinflammatory mediators that lead to lung damage with large fibrosis and rapid onset of ARDS. To further our understanding of this issue, we present the case report of lung fibrosis caused by critical COVID-19 infection.
Chaotic threshold of a class of hybrid piecewise-smooth system by an impulsive effect via Melnikov-type function
Authors: Zheng Hang , Xia Yonghui
Published: January 2022

In this paper, we study the chaotic behavior of a class of hybrid piecewise-smooth system incorporated into an impulsive effect (HPSS-IE) under a periodic perturbation. More precisely, we assume that the unperturbed system with a homoclinic orbit, it transversally jumps across the first switching manifold by an impulsive stimulation and continuously crosses the second switching manifold. Then the corresponding Melnikov-type function is derived. Based on the new Melnikov-type function, the bifurcation and chaotic threshold of the perturbed HPSS-IE are analyzed. Furthermore, numerical simulations are precisely demonstrated through a concrete example. The results indicate that it is an extension work of previous references.
Contactless temperature and distance measuring device: A low-cost, novel infrared ―based "Badge"-shaped structural model for measuring physical distance and body temperature
Authors: Kumar Abhijeet ,   Researcher, Science Section Bihar Bal Bhawan Kilkari, Under Dept. of Education Govt. of Bihar, India, Kumar Arpit
Published: January 2022

This work eases the feasibility of infrared thermometer application and reliability to introduce a novel design with upgraded applications & functions. The custom-designed compact device "Badge" structured comprises the operative methods through the electronic packages of an optimal level. The physical and social distance measured by the ToF (Time of Flight) infrared laser sensor within 1 m from the subject and the measuring equipment (MLX90632 SMD QFN and VL530LX ToF). When the distance is not maintained, or the physical distance condition is not met, the flashing LED, or vibration should trigger an indication (warning for physical distancing and alteration for pyrexia warning, respectively). Statistical analysis and simulation-based studies criticized the accuracy of ±0.5°F and relational model of the independent and dependent variable for this device with significant R2 = 0.99 and P < = 1; values with the lowest accuracy error of ±0.2°F and least residual sum of squares 0.01462 values. The portable, lightweight, and dynamic body temperature monitoring altered the application from static to continuous, complete structural design. This alternative provides the best technique to combine worn (personnel) medical devices with primary healthcare instruments to help body temperature measurements that are not contactable, fast, and accurate. It builds a way of processing through the protocol Covid-19.
Thermal vibration in rotating nanobeams with temperature-dependent due to exposure to laser irradiation
Authors: Abouelregal Ahmed E. ,   Department of Mathematics, College of Science and Arts, Al-Qurayat, Jouf University, Saudi Arabia, Khalil Khalil M. , Mohammed Wael W. , Atta Doaa ,   Basic Sciences Research Unit, Jouf University,   Department of Mathematics, Faculty of Science, University of Ha'il, Ha'il 2440, Saudi Arabia,   Department of Mathematics, College of Science, Qassim University, P.O. Box 6644, Buraydah 51482, Saudi Arabia,   Department of Mathematics, Faculty of Science, Mansoura University, Mansoura 35516, Egypt
Published: January 2022

Effective classical representations of heterogeneous systems fail to have an effect on the overall response of components on the spatial scale of heterogeneity. This effect may be critical if the effective continuum subjects' scale differs from the material's microstructure scale and then leads to size-dependent effects and other deviations from conventional theories. This paper is concerned with the thermoelastic behavior of rotating nanoscale beams subjected to thermal loading under mechanical thermal loads based on the non-local strain gradient theory (NSGT). Also, a new mathematical model and governing equations were constructed within the framework of the extended thermoelastic theory with phase delay (DPL) and the Euler-Bernoulli beam theory. In contrast to many problems, it was taken into account that the thermal conductivity and specific heat of the material are variable and linearly dependent on temperature change. A specific operator has been entered to convert the nonlinear heat equation into a linear one. Using the Laplace transform method, the considered problem is solved and the expressions of the studied field variables are obtained. The numerical findings demonstrate that a variety of variables, such as temperature change, Coriolis force due to rotation, angular velocity, material properties, and nonlocal length scale parameters, have a significant influence on the mechanical and thermal waves.
A Survey of techniques for fine-grained web traffic identification and classification
Authors: Gui Xiaolin ,   School of software, Jiangxi Normal University, Nanchang 330027, China, Cao Yuanlong , You Ilsun , Ji Lejun , Luo Yong , Luo Zhenzhen ,   Department of Information Security Engineering, Soonchunhyang University, Asan 31538, South Korea
Published: January 2022

After decades of rapid development, the scale and complexity of modern networks have far exceed our expectations. In many conditions, traditional traffic identification methods cannot meet the demand of modern networks. Recently, fine-grained network traffic identification has been proved to be an effective solution for managing network resources. There is a massive increase in the use of fine-grained network traffic identification in the communications industry. In this article, we propose a comprehensive overview of fine-grained network traffic identification. Then, we conduct a detailed literature review on fine-grained network traffic identification from three perspectives: wired network, mobile network, and malware traffic identification. Finally, we also draw the conclusion on the challenges of fine-grained network traffic identification and future research prospects.
Identification of SSBP1 as a prognostic marker in human lung adenocarcinoma using bioinformatics approaches
Authors: Huang Jian ,   Clinical Laboratory Center, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China, Xie Zheng-Fu ,   Geriatrics Department, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China
Published: January 2022

Objective

Single-stranded DNA-binding protein 1 (SSBP1) plays an important role in DNA repair processes and the maintenance of genomic stability. The aim of this study was to evaluate the expression of SSBP1 and its prognostic value in lung adenocarcinoma (LUAD) using bioinformatics approaches.

Methods

We applied databases including UALCAN, Kaplan-Meier plotter, LinkedOmics, Webgestalt, cBioPortal and TIMER2.0 in this study.

Results

We found that SSBP1 expression was up-regulated in LUAD samples and was correlated with clinicopathological features including age, cancer stage, and nodal metastasis status by the UALCAN analysis. Multivariate Cox regression analysis by the Kaplan-Meier plotter showed that high SSBP1 expression was independently correlated with poor overall survival (hazard ratio = 1.63, 95% confidence interval: 1.08−2.46, logrank P = 0.02). The LinkedOmics analysis showed that 5078 genes were positively correlated with SSBP1 expression, whereas 7905 genes were negatively correlated with SSBP1 in LUAD. Functional enrichment analysis using the Webgestalt tool showed that for SSBP1 and the genes positively correlating with it, the significantly enriched biological process was ribosomal large subunit biogenesis, and the significantly enriched pathway was proteasome. According to the cBioPortal database, the frequency of SSBP1 alterations was 1.7% in LUAD patients, and patients with SSBP1 alterations had worse prognosis (logrank P = 4.26e-05) compared with those unaltered for SSBP1. Finally, SSBP1 expression was negatively correlated with B cell infiltration level (Rho = −0.193, P = 1.54e-05) and the expression of B cell biomarkers including CD79A and CD19.

Conclusion

Our results suggest that SSBP1 may be a prognostic marker for human LUAD.
»Zašto djeca nisu oduzeta na vrijeme? «: Analiza medijskih izvještaja o socijalnim radnicima povodom medijski eksponiranih slučajeva zlostavljanja djeteta
Authors: Stanić Luka
Published: January 2022

During the last several years, the Croatian public has been shaken by tragic violent events involving children within the family. In 2017 a mother killed her threeyear-old son, and in 2019 a father attempted to murder his four minor children. When such things occur, the media and the public try to determine why they were not prevented and who is responsible for their prevention, and the ones who are most frequently considered as responsible are social workers. The aim of this research is to analyse discursive constructions (narratives, rhetorical techniques) within media articles on social workers on the occasion of high-profile cases of child abuse. Discursive psychology was used as an analysis method. 76 articles published on the most frequented news portals in Croatia were analysed. The portals were selected on the basis of the number of actual users according to the data by Gemius Rating and a Reuters survey of users’ self-reports about visiting web sites. The analysed articles were published in the period from May 24, 2017 to October24, 2018 and in the period from February 28, 2019 to July 1, 2019. Results indicate that in reporting on critical events of child abuse the most frequent narrative in the media is “inadequate action of social workers”. In that narrative the media and the public criticise social workers for failure to provide adequate protection to children and consider that they are not professional enough. In response to that narrative, there are narratives about “social workers as the victims of inadequate system”, “social welfare system in crisis”, and “positive attitude towards social workers”. Within these narratives, social workers and professional organisations educate the public on shortcomings and difficulties within the social welfare system that hinder the work of social workers, which can lead to violations of the users’ rights. They also call upon relevant authorities to undertake necessary reforms. Social workers are characterised as professional and committed to their work. Two additional narratives also appear: “problems in public services” and “a call for making changes”. In the narrative about problems in public services, lawyers and judges mention problems in court proceedings related to the protection of the rights of children, but they also question the knowledge and professionalism of social workers. In the narrative about the need to make changes, professional organisations demand that the authorities and the public turn towards reforms instead of criticism of social workers. Key words: social work; media; child abuse; discursive psychology
Digitalizacija poslovanja sektora socijalne i dječje skrbi u Crnoj Gori – socijalni karton (IISSS)
Authors: Kolinović Ida
Published: January 2022

Social Welfare Information System (SWIS) – Social Card is digital transformation in the service of the social and child protection system reform in Montenegro, with the aim of providing the highest quality of social protection for the poor and socially endangered, in the area of material benefits and social and child protection services. This capital project of the Montenegrin Government has significantly improved the way social work centers’ work, because it has supported all business processes and enabled the creation of a single “social card” of the citizens involved in the system of social welfare and child protection services. This paper presents the information system in social work centers and public institutions for accommodation of beneficiaries (which include direct practice, decision-making and case management, information flow management, storage of historical and up-to-date data on beneficiaries and their families), as well as the benefits of this system for beneficiaries, social and child welfare employees and policy makers. SWIS is an important instrument for targeted funding, provision, monitoring and control of material benefits and services provided to families and individuals, and it has improved the capacity of the Government of Montenegro to plan, monitor and manage social and child protection services. The development and introduction of this software required intensive cooperation of experts, employees in the field of social and child protection, software company S&T (Serbia and Montenegro), UNDP and the Directorate for Informatics and Analytical and Statistical Affairs of the Ministry of Labor and Social Welfare. Key words: digitalization in social protection; SWIS; material benefits; social and child protection services; institutions for accommodation of users
Phase space holography with no strings attached
Authors: Khveshchenko D.V.
Published: January 2022

Keywords: phase space, holographic correspondence, hydrodynamics, effective metric We discuss the Wigner function representation from the novel standpoint of establishing a natural holographylike correspondence between the descriptions of a generic quantum system in the phase space (‘bulk’) picture versus its spacetime (‘boundary’) counterpart. In certain cases, the former may reduce to the gravity-like dynamics of a local metric-type variable while the latter takes on the form of some bosonized collective field hydrodynamics. This generic pseudo-holographic duality neither relies on any particular symmetry of the system in question, nor does it require any relation to some underlying ‘string theory’, thus providing a systematic way of constructing practical – as opposed to the previous ‘ad hoc’ – examples of genuine holographic duality.
Machine Learning Models to Predict Students’ Study Path Selection
Authors: Dirin Amir , Saballe Charlese Adriana
Published: January 2022

Selecting a proper study path in higher education is a difficult task for many students. They either have a lack of knowledge on the study path offered or are unsure of their interest in the various options. The current educational setups enable us to collect valid and reliable data on student success and learning behaviour. This study explores and solves the problem of what path to select by proposing possible study paths with the help of machine learning algorithms.  Learning analytics (LA) and educational data mining (EDM) are technologies that aid in the analysis of educational data. In this quantitative study, we applied a questionnaire to collect data from students at the Business Information Technology Department (Bite) at the Haaga-Helia University of Applied Science. We managed to collect 101 samples from students during 2017–2018. We used various machine learning algorithms and prediction models to assess the best approach for study path selection.  We applied three performance scores of accuracy, Cohen’s Kappa, and ROC curve to measure the accuracy of the algorithm results. KNIME analytics was selected as a proper tool to pre-process, prepare, analyse, and model the data. The results indicate that Random Forest (94% accuracy) and Decision Tree (93% accuracy) are the best classification models for students’ study path selection. The contribution of this study is for educational data mining research to assess the comparison of various algorithms. Furthermore, this is a novel approach to predict students’ study path selection, which educational institutes should develop to assist students in their study path selection.
5G Enhanced Mobile Broadband (eMBB): Evaluation of Scheduling Algorithms Performances for Time-Division Duplex Mode
Authors: Mamane Asmae , Fattah Mohammed , El Ghazi Mohammed , El Bekkali Moulhime
Published: January 2022

5G mobile communications introduce novel solutions to overcome the frequency spectrum’s shortage. It broadens the spectrum band to millimeter-waves, employs multiple numerologies to calculate subcarrier spacing, and supports various division duplex modes. Furthermore, the fifth generation of mobile networks intends to employ both, frequency division duplex, and time division duplex. This study focuses on Time Division Duplex (TDD) mode. Compared to the Frequency Division Duplex (FDD), the time duplex mode enhances flexibility and allows efficient frequency spectrum usage. However, the recent papers addressing resource scheduling issues for TDD duplex employ only the current classical schedulers, which were primarily designed for FDD mode, to accomplish radio resource allocation. In this paper, we compared the achievable throughput and data accumulated in the buffer of these schedulers to assess their suitability and compatibility with TDD specifications. The resulting performances show that an appropriate scheduler in line with TDD requirements should be implemented to exploit the available spectrum efficiently and reach the required throughput.
Factors Affecting Students’ Desire to Take Upcoming Online Courses after E-learning Experience During Covid 19
Authors: Nguyen Nga Thuy , Tran Huong Thi Thu
Published: January 2022

Since 2020, Covid 19 has completely changed the daily activities of almost all nations, and education has been heavily affected. Because of school closures, face-to-face classrooms were halted or replaced with online classes in which both lecturers and learners had to adjust their teaching and learning styles to cope with unexpected situations. The ‘new normal’ of learning from homes, spending hours staring at screens, and struggling with piles of online tasks has somehow demotivated students to continue learning. This study explores factors affecting students’ desire to take online courses after experiencing e-learning during Covid 19. Nine hundred fifty-five students of Vietnam National University took part in the survey via an online questionnaire. Data were analyzed using SPSS20; correlation, hierarchical regression was employed to examine how online factors influence students’ decision. The research results showed that skill enhancement, self-regulated learning, lecturer interaction during the course were among the most important predictors of students’ desire to take more online courses. In contrast, student interaction imposed no significant influence. This study gives the theoretical background for other studies in the same field and suggests practical implications for governments and universities to implement online training better to cope with the pandemic...
Recycling of Waste Medical Plastic Syringes in Manufacturing Low-Cost Structural Sections
Authors: Faesal Rashid , Bdaiwi Waleed
Published: January 2022

Particles of waste from plastic medical syringes (WPMS) are recycled with a polymeric adhesive from unsaturated polyester resin (UPS) to manufacture structural profiles at the lowest cost, and that could be used in various applications such as buildings, furniture manufacturing, toys, etc. The manual molding method was used in preparing the models for testing with the following volumetric fractions (0%, 30%, 40%, 50%, 60%, 70%, 80%), and with a granular size of (0.45mm) of WPMS). Some tests were performed on the prepared samples, including mechanical ones, tests included are (tensile test, bending test, and hardness test), in addition to the physical test, which is (thermal conductivity),The results of the mechanical tests showed an increase in the values of mechanical properties of (tensile strength, the flexural modulus, and hardness) as the volumetric ratios of (WPMS) particles increased. Whereas, the thermal conductivity values decreased as the volumetric ratios of (WPMS) particles increased. Given that this is the first time that this type of waste is used in manufacturing structural profiles at a low-cost in exchange for less harms to the environment. Keywords: Waste, Recycling, low-cost structures, plastic syringes, unsaturated polyester adhesive.
Effect of Fiber Length and Chemical Treatment on Wear Rate of the Natural Reinforced Polymer
Authors: Salih Wafaa
Published: January 2022

The influence of fiber length and treated chemically on wear properties by using jute fibers reinforcing in polymer-matrix composites (PMC) has been considered. From the results, it was found that The wear rate decreasing with increasing load from (78.6 -70.35)%, (65.6-59.16)% and (72.9-67.7)% for (5,10,15) KN load respectively that decreasing due to disintegrating the sample's surface under increasing loads. also, The wear rate decreases with increasing load from (78.6 -70.35) gm/mm (65.6-59.16)gm/mm and (72.9-67.7) gm/mm for (5,10,15) KN load respectively that decreasing due to disintegrating the sample's surface under increasing loads. also,The rate of wear decreases with an increase in the length of the fibers by (65%), due to the effect of fiber length that causes difficulty in separating between fibers from the polymeric material, which means that the material is resistant to collapse and also in the presence of a chemical in the processing, which causes a strong bond and good adhesion between the reinforcing material and the material The basis resulting from pitting caused by chemical treatment.
Modeling and Validation of the Enthalpy-Temperature Curve for Phase Change Materials
Authors: Eid Salam , Lahoud Chawki , Brouche Marwan , Hmadi Mohamed , Lahoud Christy
Published: January 2022

Thermo-dynamical studies have proven that introducing phase change materials (PCM) to the building’s envelope could decrease the heat transfer exchange rate and maintain the inside thermal comfort for long periods. Among all types of PCM applications in the building’s envelope, the cement-plaster is the most cost-effective. The composite PCM-plaster material was formed by mixing predefined mass percentages of PCM microcapsules with local cement, sand, and water. This paper aims to establish a direct solution for the enthalpy-temperature variations for the PCM composite material. This solution will enable to study the effect of the composite material on buildings' energy loads. The obtained model has been also validated against experimentally tested samples and results were in complete agreement. This model will enable researchers to obtain the correct heat response when the envelope of the building is subjected to different external weather solicitations.
Spatial Analyzing of the Chemical Soil Properties for the Sanam Mountain- Al Zubair Region South of Basra Province and Diagnosis of its Effects on Soil Qualities Using Remote Sensing Technology and GIS
Authors: Naji Taghreed Abdulhameed , Al-Jasim Ali Adnan N. , Shaban Auday H. , Abduljabbar Hameed Majed
Published: January 2022

The article discusses the spatial analysis of the chemical soil properties that is a key component of the agriculture ecosystem based on satellite images. The main objective of the present study is to measure the chemical soil properties (total dissolved salts (TDS), Electrical conductivity (EC), PH, and) and the ​spatial variability. On 13 November 2020 (wet season), a total of 12 soil samples were collected in the field through random sampling in the Sanam mountain-Al Zubair region south of Basra province, to contain its soil samples components of minerals and precious elements such as silica and sulfur. From experimental results, the soil sample in the sixth position has the highest concentration of TDS values, reached (5798.4 mg/l), and the soil chemical parameters (EC,and Sodium Adsorption Ratio (SAR), and the percentage of sodium dissolved in the soil (Na%)), which they exceeded the limit when compared with the Iraqi determinants and the World Health Organization determinants. Furthermore, the results showed spatial fitting and a high correlation between Salinity and Sodium Adsorption Ratio in the soil. Anomalies of the pH value (7.05) at the position_10 instead of position_11 (7.1) that has a very strongly saline soil, due to attributed to the presence of sulfur in this position. The article describes the spatial prediction for TDS values through the application of the curve fitting process using soil salinity index was done for the wet season years of (2000, 2005, 2010, 2015, 2018, 2020) and 2020_dry season for each position of the same field samples, to study the extent of the variation that occurred over these years. The highest concentration of TDS values was in positions (4, 6 & 8), as listed in table 5. The spatial analysis and data processing has been carried out using the Quantum Geographic Information System (QGIS 3.16) and Environment for Visualizing Images (ENVI 5.3).
Effect of Al-Doped on the Electrical Properties of Nb2O5 Film Prepared by DC. Plasma Sputtering Technique
Authors: Jassim Oras A. , Mutter Mahdi M. , Khalil Souad
Published: January 2022

Thin films of Niobium oxide (Nb2O5) co-doped with (0.5, 1, and 1.5) %wt. percentages of Aluminum (Al) were prepared on glass substrates by DC. Sputtering plasma technique. The effects of Al concentration on structural, surface morphology, optical and electrical properties of transparent were investigated. Polycrystalline structures without any second phases were observed with preferential orientations along the (001), (100), (101), (002), and (111) planes. The crystalline size as determined from the (001) peaks lay in the range (20-50) two theta and all films of Nb2O5: Al films have pseudohexagonal phase. It was observed that Al doping reduced the crystal size but at the samples 0.5%Al the crystalline size increased slightly. Also, it's observing from SEM images an increase in particle size after Al-doped. The minimum resistivity was found to be 4.79 x104 (Ω.cm) for the Nb2O5 doped with 1.5%Al concentration and maximum resistivity was found to be (4.86 x104 (Ω.cm) for the pure Nb2O5. The doping to the optimum level of 1.5% Al concentration increases the electrical conductivity of Nb2O5. The mobility decreased but the sample 1.5%Al concentration increases and the carrier concentration increased with increasing the doping with Al but the sample 1.5%Al concentration decreases. The analysis of Hall coefficient showed the Nb2O5: Al films were n-type.
The Effect of Gamma Radiation on the Manufactured HgBa2Ca2Cu2.4Ag0.6O8+δ Compound
Authors: Neamah Zainab J. , Ahmed Balqees A. , Thejeel Mohammed Abdul Nebi , Jasim Kareem Ali , Shaban Auday H.
Published: January 2022

In this article four samples of HgBa2Ca2Cu2.4Ag0.6O8+δ were prepared and irradiated with different doses of gamma radiation 6, 8 and 10 Mrad. The effects of gamma irradiation on structure of HgBa2Ca2Cu2.4Ag0.6O8+δ samples were characterized using X-ray diffraction. It was concluded that there effect on structure by gamma irradiation. Scherrer, crystallization, and Williamson equations were applied based on the X-ray diffraction diagram and for all gamma doses, to calculate crystal size, strain, and degree of crystallinity. It is observed through the results that gamma irradiation causes a change in the atomic density, crystal size, strain, degree of crystallinity and thus a change in the diffraction angle and intensity peaks. It was found that the highest crystal size was 69.3269 nm at 4MRad dose, crystallization is 69.3269 at 4MRad and the strain is 0.0068 when sample without radiation.
Synthesis of Nanostructured Al-Doped Nb2O5 Thin Films Using DC Sputtering Plasma for the Gas Sensors Applications
Authors: Jassim Oras A. , Khalil Souad G. , Mutter Mahdi M.
Published: January 2022

Nb2O5 is one of the most favorable transparent conducting oxide materials, which is efficiently used in thin film gas sensors especially for reducing gases. In this research, Al-doped Nb2O5 thin films on glass substrates with the DC plasma sputtering method for sensing NH3 and NO2 gases. The effect of thermal oxidation time on morphological, structural properties, and gas sensing properties of Nb2O5: Al thin films are investigated. Annealing was performed at 450 ° C for two hours. The results of X-ray diffraction (XRD) revealed that the structures are amorphous. Surface topography and growth behavior of Al-doped Nb2O5 thin films have an essential role in the optimization of gas sensing properties of these films. Also, atomic force microscopy (AFM) has been used to investigate the surface topography of the obtained films. Obtained results from these analyzes revealed that the films have monoclinic phase and surface topography of Nb2O5:Al thin films affected by Al-doped, the roughness and grain size of the surface increased with the increase in the Al content. Also, the effect of Al-doped on the performance of Nb2O5 thin films gas sensors is investigated. The results indicated that the best response was Nb2O5 film of NH3 gas and Nb2O5:1%Al of NO2 gas.
Evaluating the Influence of Adding Natural Materials to Copper and Zinc Compounds
Authors: Hassan Zainab Kassim
Published: January 2022

This article produced porous materials by using a simple and easy method which is a powder metallurgy. This search studying an experimental fulfillment on the thermal conductivity, apparent porosity, and Diametrical Strength of porous copper-zinc manufactured by the convert to carbon since firing process and combined with the oxygen cause to CO2 gas that rises up to air and leaves the number of pores. the basic metals are Cu and Zn pure powder metals with a different ratio (10-20-30)% of natural leaves especially palm leaves which is widely found in our natures, Cu fine powder (220 µm) has purity 99.5% as a matrix material to prepared composite material with ratio 80% of material total weight, 500g, Zn fine powder added as 20% from material total weight, the Zn metallic powder has purity 99.5%. The Zn powders have size particle less than200 m. Grounded palm leaves were cut to small parts then milled by using electrical mortar to get a fine powder which have a green size (less than 0.75 m) which result by sieving instruments. The results show various values in each test. In physical testing the apparent porosity from pure \Cu-Zn has 0.11%,10%0.187%,20% 0.22,30%0.32%,where the higher value for samples of palm leaves which has presence in a higher value in 30% of palm leaves, the others tests in thermal conductivity and diametric strength, in thermal conductivity have(5 W/m.k for pure material, in 10% 0.65 W/m.k, in20% 0.38 W/m.k,in 30% 0.2 W/m.k)for Cu-Zn-P.L composites these investigations show a decreasing ingredients especially in 30%, which have the lower value with the same effect in Diametrical Strength in pure samples has 25Mpa,in 10% has 10 Mpa, in 20%6Mpa,in30% 2.5Mpa.Generally the Optimum properties of Cu-Zn-P.L additives are attained with least porosity content. The existences of porosity decline the Diametrical Strength, thermal conductivity. Thus the aim of this study was to create porous composites metal MMC with has high attractive as an insulating material, and porous composites with natural additives.
Core Competency–Related Professional Behaviors During Patient Encounters: A Report From the Association for Athletic Training Education Research Network
Authors: Welch Bacon Cailee E. , Cavallario Julie M. , Walker Stacy E. , Bay R. Curtis , Van Lunen Bonnie L.
Published: January 2022

Context

To enhance the quality of patient care, it is important that athletic trainers integrate the components of the core competencies (CCs; evidence-based practice [EBP], patient-centered care [PCC], health information technology [HIT], interprofessional education and collaborative practice [IPECP], quality improvement [QI], professionalism) as a part of routine clinical practice. In what ways, if any, athletic training students (ATSs) are currently integrating CCs into patient encounters (PEs) during clinical experiences is unclear.

Objective

To describe which professional behaviors associated with the CCs were implemented by ATSs during PEs that occurred during clinical experiences.

Design

Multisite panel design.

Setting

A total of 12 professional athletic training programs (5 bachelor's, 7 master's level).

Patients or Other Participants

A total of 363 ATSs from the athletic training programs that used E*Value software to document PEs during clinical experiences participated.

Main Outcome Measure(s)

During each PE, ATSs were asked to report whether professional behaviors reflecting 5 of the CCs occurred (the professionalism CC was excluded). Summary statistics, including means ± SDs, counts, and percentages were tabulated for the professional behaviors of each CC.

Results

Data from 30 630 PEs were collected during the study period. Professional behaviors related to EBP were the most frequently incorporated during PEs (74.3%, n = 22 773), followed by QI (72.3%, n = 22 147), PCC (56.6%, n = 17 326), HIT (35.4%, n = 10 857), and IPECP (18.4%, n = 5627).

Conclusions

It is unsurprising that EBP and PCC behaviors were 2 of the most frequently incorporated CCs during PEs due to the emphasis on these competencies during the past several years. However, it is surprising that ATSs did not incorporate behaviors related to either HIT (in 65% of PEs) or IPECP (in 82% of PEs). These findings suggest that directed efforts are needed to ensure that ATSs are provided opportunities to incorporate professional behaviors related to the CCs during clinical experiences.
Receiver operating characteristic curve: overview and practical use for clinicians
Authors: Nahm Francis Sahngun
Published: January 2022

Using diagnostic testing to determine the presence or absence of a disease is essential in clinical practice. In many cases, test results are obtained as continuous values and require a process of conversion and interpretation and into a dichotomous form to determine the presence of a disease. The primary method used for this process is the receiver operating characteristic (ROC) curve. The ROC curve is used to assess the overall diagnostic performance of a test and to compare the performance of two or more diagnostic tests. It is also used to select an optimal cut-off value for determining the presence or absence of a disease. Although clinicians who do not have expertise in statistics do not need to understand both the complex mathematical equation and the analytic process of ROC curves, understanding the core concepts of the ROC curve analysis is a prerequisite for the proper use and interpretation of the ROC curve. This review describes the basic concepts for the correct use and interpretation of the ROC curve, including parametric/nonparametric ROC curves, the meaning of the area under the ROC curve (AUC), the partial AUC, methods for selecting the best cut-off value, and the statistical software to use for ROC curve analyses.