bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis of number sense capabilities of prospective mathematics teachers
Authors: Mawaddah S , Noorbaiti R , Ulfah A 
Published: January 2021

Abstract
A person’s sensitivity to numbers and their calculations is called number sense. This study aims to (1) analyze the number sense ability of prospective mathematics teacher students, (2) determine the mathematics learning achievement of prospective mathematics teacher students, and (3) analyze whether there is a relationship between number sense ability and mathematics learning achievement of prospective mathematics teacher students. The method used in this research is a descriptive quantitative method. The population in this study were students of the Mathematics Education Study Program FKIP University of Lambung Mangkurat Banjarmasin in the odd semester of 2019/2020. The sample in this study were students of the Mathematics Education Study Program Class of 2018. Data collection techniques were tests and questionnaires. The data obtained were analyzed with descriptive and inferential statistics. The results showed that (1) the students’ number sense ability of prospective mathematics teachers was in sufficient qualification. (2) the average learning achievement of prospective mathematics teacher students is 2.62 on a scale of 4, and (3) there is a relationship between number sense ability and mathematics learning achievement of prospective mathematics teacher students. Thus, improving the number sense of prospective mathematics teachers is an important goal for mathematics teacher education.
Mathematical communication skills of students in mathematics learning using discovery learning model
Authors: Zulkarnain I , Kusumawati E , Mawaddah S 
Published: January 2021

Abstract
This research aims to describe the communication skills of students in class XI MAN 1 Banjarmasin in mathematics learning using discovery learning model at 2018/2019 academic year. The method used in this research is quantitative descriptive. The object of study is to find students’ mathematical communication skills using discovery learning model. Data collection techniques used were test techniques. The instrument used was a written test in the form of description to measure students’ mathematical communication skills in mathematics learning using the discovery learning model. The results showed that students’ mathematical communication skills in learning mathematics using the discovery learning model in class XI MAN 1 Banjarmasin 2018/2019 academic year were in good qualifications. Therefore, the mathematics teacher can implement discovery learning to improve students’ mathematical communication skills in mathematics learning.
The development of Wayang Golek Video as physics learning media in the concept of light
Authors: Pairunan A S , Darsikin  , Saehana S 
Published: January 2021

Abstract
This study aims to develop wayang golek puppet show as a learning medium for physics subject, specifically on the concept of light. This research is a research and development that refers to the ADDIE model which includes 5 stages, namely Analysis, Design, Development, Implementation, and Evaluation. The video playback for the wayang golek puppet show produced were developed by involving Grade VIII students of Terpadu Madani Model Junior High School. The resulting wayang golek puppet video products were analyzed by media experts and content experts using questionnaires. It was found that the average score of the content expert’s assessment was 3.56 which belonged in the “Very Good” category, whereas the average score of the media expert was 3.73 which was categorised in the “Very Good” category. In addition, the resulting media was also analyzed by the teacher for its feasibility using questionnaires. The result obtained an average score of 3.00 and was categorized as “Good”. Furthermore, the final product of the video media playback was also tested on students, and an average score of 3.27 was obtained. This is categorized as “Strongly Agree”. The results of this study indicate that the wayang golek video media playback is feasible to be used as a medium for learning physics, especially regarding the light concepts for students.
Learning design: Integrated local tradition ma’dawa-dawa, ma’manu-manu, ma’pettuada based on android
Authors: Nurannisa A , Asfar A M I T , Asfar A M I A 
Published: January 2021

Abstract
Mathematical skills that are of major concern at this time are extrapolation abilities which require students to be able to solve mathematical problems with abstract and hierarchical concepts. To improve this capability, it can be done by integrating local technology-based traditions that have an educational philosophy. This study aims to review the integrated learning design of the local culture of Ma’dawa-dawa, Ma’manu-manu, Ma’pettuada based on android in improving extrapolation abilities. This research uses a descriptive qualitative research method with data in the form of analysis of some literature that supports research studies and is arranged descriptively containing a theoretical basis. The results of the study indicate that designed learning can be a means of developing extrapolation abilities through the integration of technology-based local cultures.
Waste composite of “JOS” coffee waste and gauze as alternative basic material for manufacturing craft products
Authors: Purwanto  , Prihatmo G , Diasmara G 
Published: January 2021

Abstract

The growth of coffee business in Indonesia has given rise to coffee shops in big cities, in Yogyakarta and its surroundings (2017) reaching 1,200. This number is higher than Semarang 700 and Solo only 400 shops. Yogyakarta as a student city is famous for its “jos” coffee, which is coffee infused with burning charcoal so that the sound of “jos” can rise. This city has many students, artists and younger generation who enjoy “jos” coffee. The “jos” coffee waste produced, one of which is in Pak Agus’ shop, is 4-6 kg/night. The aim of this research is to use “jos” coffee grounds waste as a basic material for making composites. The research method was carried out through experiments in the laboratory by making a composite waste of coffee grounds mixed with water, gauze fiber, coconut coir fiber, alginate, glycerol and gelatin. Composite composition consisted of “jos” coffee grounds from 10, 20 and 30 grams, 120 ml water, gauze, coconut fiber, 3 grams of alginate, 2 drops of glycerol, gelatin from 2,3,4, and 5 grams. The ingredients are cooked for 5 minutes, printed and then left for 24 hours. he resulting composites were tested for tensile, tear test, flexibility tested and observed for surface texture Composites with coconut coir fibers have poor surface texture and are easily fractured so that the mechanical properties of what is tested are composites reinforced with gauze fibers. The mechanical properties of the best composites were reinforced with gauze with a composition of 20 grams of coffee and 4 grams of gelatin, the tensile strength was 15.58 kg/mm2 and the tear resistance was 11.51 kg. From the observation that the composite has a smooth surface texture and can be bent up to 1800, so that it can be formed as an alternative material for making handicraft products.
Friction response of bioinspired AISI 52100 steel surfaces texturized by photochemical machining
Authors: Sánchez J C , Estupiñán H , Toro A 
Published: January 2021

Abstract
This work shows the friction response of textured steel surfaces whose deterministic design is inspired in the characteristics of the Vipera Ammodytes snake skin. The skin was studied to identify morphological, chemical, mechanical and tribological attributes that served as inspiration for the design of the deterministic patterns, which were reproduced in AISI 52100 steel samples by Photochemical Machining (PCM). The textured samples were tested in a pin-on-disc tribometer using AISI H13 steel as counter body. The results showed an effective reduction of up to 38% in the friction coefficient of the texturized samples when compared to the conventional ones, as well as an anisotropic friction behavior as a function of the sliding direction. In addition, it was observed that the percentage of texturized area of the samples strongly affected the friction response, especially for values higher than 20%.
Insight on the properties of thermoplastic elastomer-based natural rubber and recycled rubber post-treated with electron beam irradiation
Authors: Mohamad Siti Fatahiyah , Osman Hasnul Nizam Bin , Karoji Muhamad Nurfalah Bin , Ibrahim Pairu , Osman Al Edrus Syeed SaifulAzry , Hua Lee Seng , Rahim Nik Muhammad Faris Hakimi Abd , Guan Chuah Teong 
Published: January 2021

Abstract
Thermoplastic elastomers are an indispensable group of materials used in various relevant industries. This study aims to enhance the properties of thermoplastic elastomers by blending the same ratio of natural rubber (NR) and recycled rubber (RR) with different ratios of high-density polyethylene (HDPE). Therefore, the study examined the effect of irradiation on the crosslinking of the main chain of thermoplastic elastomer (TPE) based on a 1:1 ratio of natural rubber and recycled rubber. TPE was prepared at different time periods and composition ranges by mixing recycled rubber with natural rubber together with HDPE. Using an internal Haake machine mixer, the mixing process was conducted, and the mix was standardized using a two-roll mixer. All samples were exposed under electron beam irradiation for structural modification. The effect of crosslinking in TPE was determined by analyzing the gel content. The high dose of irradiation resulted in a higher gel content, indicating an increase in crosslinking. The effect of irradiation and HDPE as a filler increased TPE’s tensile strength, while higher RR/NR compositions improved elongation properties. The irradiation dose of 50 to 150 kGy exhibited an increase in mechanical properties than the unirradiated composites. The FTIR analysis confirmed the presence of a carbonyl group formed after irradiation through a decomposition-oxidation reaction. The study found that high NR/RR ratios increase elongation and thermal characteristics. The homogenous blending of NR/RR/HDPE was shown from the blending profile, crosslinking density, and morphology. The high amounts of NR/RR ultimately enhance TPE’s thermal stability.
Trends in Frailty and Its Association With Mortality: Results From the Longitudinal Aging Study Amsterdam, 1995–2016
Authors: Hoogendijk Emiel O , Stolz Erwin , Oude Voshaar Richard C , Deeg Dorly J H , Huisman Martijn , Jeuring Hans W 
Published: January 2021

Abstract
The aim of this study was to investigate trends in frailty and its relationship with mortality among older adults aged 64–84 years across a period of 21 years. We used data from 1995 to 2016 from the Longitudinal Aging Study Amsterdam. A total of 7,742 observations of 2,874 respondents in the same age range (64–84 years) across 6 measurement waves were included. Frailty was measured with a 32-item frailty index, with a cutpoint of ≥0.25 to indicate frailty. The outcome measure was 4-year mortality. Generalized estimating equation analyses showed that among older adults aged 64–84 years the 4-year mortality rate declined between 1995 and 2016, while the prevalence of frailty increased. Across all measurement waves, frailty was associated with 4-year mortality (odds ratio = 2.79, 95% confidence interval: 2.39, 3.26). There was no statistically significant interaction effect between frailty and time on 4-year mortality, indicating a stable association between frailty and mortality. In more recent generations of older adults, frailty prevalence rates were higher, while excess mortality rates of frailty remained the same. This is important information for health policy-makers and clinical practitioners, showing that continued efforts are needed to reduce frailty and its negative health consequences.
rboAnalyzer webserver: web service for non-coding RNA characterization from NCBI BLAST output
Authors: Schwarz Marek , Vohradský Jiří , Pánek Josef 
Published: January 2021

Abstract

Summary
We present a web service for improving characterization of non-coding RNAs (ncRNAs) from NCBI BLAST outputs, based on a command-line application rboAnalyzer. Briefly, the application extends subject sequences of selected high scoring pairs (HSPs) in BLAST output to their plausible full length, and predicts their homology and secondary structures. The aim of the application is to aid to characterize subject RNAs in HSPs that come uncharacterized in BLAST output. The main advantages of the web-server are easy use and interactive analysis with search, filtering and data export options.

Availability and implementation
The web server is freely available at rboanalyzer.elixir-czech.cz. The website frontend is implemented in Elm, while backend is implemented in Python and served by Apache.
Random forest of perfect trees: concept, performance, applications and perspectives
Authors: Nguyen Jean-Michel , Jézéquel Pascal , Gillois Pierre , Silva Luisa , Ben Azzouz Faouda , Lambert-Lacroix Sophie , Juin Philippe , Campone Mario , Gaultier Aurélie , Moreau-Gaudry Alexandre , Antonioli Daniel 
Published: January 2021

Abstract

Motivation
The principle of Breiman's random forest (RF) is to build and assemble complementary classification trees in a way that maximizes their variability. We propose a new type of random forest that disobeys Breiman’s principles and involves building trees with no classification errors in very large quantities. We used a new type of decision tree that uses a neuron at each node as well as an in-innovative half Christmas tree structure. With these new RFs, we developed a score, based on a family of ten new statistical information criteria, called Nguyen information criteria (NICs), to evaluate the predictive qualities of features in three dimensions.

Results
The first NIC allowed the Akaike information criterion to be minimized more quickly than data obtained with the Gini index when the features were introduced in a logistic regression model. The selected features based on the NICScore showed a slight advantage compared to the support vector machines—recursive feature elimination (SVM-RFE) method. We demonstrate that the inclusion of artificial neurons in tree nodes allows a large number of classifiers in the same node to be taken into account simultaneously and results in perfect trees without classification errors.

Availability and implementation
The methods used to build the perfect trees in this article were implemented in the ‘ROP’ R package, archived at https://cran.r-project.org/web/packages/ROP/index.html.

Supplementary information
Supplementary data are available at Bioinformatics online.
Safety and efficacy of tranexamic acid in minimizing perioperative bleeding in extrahepatic abdominal surgery: meta-analysis
Authors: Koh A , Adiamah A , Gomez D , Sanyal S 
Published: January 2021

Abstract

Background
Perioperative bleeding is associated with increased morbidity and mortality in patients undergoing elective abdominal surgery. The antifibrinolytic agent tranexamic acid (TXA) has been shown to reduce perioperative bleeding and mortality risk in patients with traumatic injuries, but there is a lack of evidence for its use in elective abdominal and pelvic surgery. This meta-analysis of RCTs evaluated the effectiveness and safety of TXA in elective extrahepatic abdominopelvic surgery.

Methods
PubMed, Embase, and ClinicalTrial.gov databases were searched to identify relevant RCTs from January 1947 to May 2020. The primary outcome, intraoperative blood loss, and secondary outcomes, need for perioperative blood transfusion, units of blood transfused, thromboembolic events, and mortality, were extracted from included studies. Quantitative pooling of data was based on a random-effects model.

Results
Some 19 studies reporting on 2205 patients who underwent abdominal, pelvic, gynaecological or urological surgery were included. TXA reduced intraoperative blood loss (mean difference –188.35 (95 per cent c.i. –254.98 to –121.72) ml) and the need for perioperative blood transfusion (odds ratio (OR) 0.43, 95 per cent c.i. 0.28 to 0.65). TXA had no impact on the incidence of thromboembolic events (OR 0.49, 0.18 to 1.35). No adverse drug reactions or in-hospital deaths were reported.

Conclusion
TXA reduces intraoperative blood loss during elective extrahepatic abdominal and pelvic surgery without an increase in complications.
Social work legitimacy: democratising research, policy and practice in child protection
Authors: Warner Jo 
Published: January 2021

AbstractThis article analyses the concept of legitimacy as applied to the use of power in statutory social work with children and families in the UK. It draws on literature from police studies and criminology, in which the concept is a stable one that continues to be heavily researched and analysed. Police and social workers bear comparison in respect of legitimacy because of the significant powers they use on behalf of the state with direct implications for the civil and human rights of their fellow citizens. The article defines legitimacy in theoretical terms before applying the concept to social work. Here, perceptions of fairness in the distribution of resources, the quality of treatment people receive, and the quality of decision-making are critically examined. The article then proposes a democratising agenda across the three domains of social work research, policy, and practice. Through challenging social work’s legitimacy and analysing its relationship to social democracy, it is argued that new ways may be found to realign practice with the values of human rights and social justice that are said to underpin the profession. Given the severe socioeconomic impact of the Covid-19 pandemic on many families, these questions acquire a particular urgency.
Stereospecific Response of E/Z-isomers of N-Nitrososarcosine in LC–ESI–MS/MS
Authors: Werneth Madeleine , Pani Jutta , Hofbauer Ludwig , Pummer Stefan , Weber Maria-Theres , Pour Georg , Kählig Hanspeter , Mayer-Helm Bernhard , Stepan Herwig 
Published: January 2021

Abstract
The carcinogenic compound N-nitrososarcosine (NSAR) is found in foods and tobacco products, and its quantification is of great interest. Although the presence of two stereoisomers, E- and Z-NSAR, is well-known, individual investigation of the isomers has not been reported so far. The present study by liquid chromatography–electrospray ionization–tandem mass spectrometry (LC–ESI–MS/MS) reveals that (i) the mass spectrometric responses of the isomers differ by a factor of approximately two and (ii) the isomer ratio is unstable in freshly prepared standard solutions. As a consequence, NSAR concentrations determined by LC–ESI–MS/MS are biased if those facts are not taken into account. The method described here overcomes the difficulty of stereospecific response by adjusting the isomer ratio and was applied to 100 tobacco products and fully validated for moist and dry snuff reference materials showing expanded measurement uncertainties of ~20% and limits of quantification of ~20 ng/g.
Pitfalls when comparing COVID-19-related outcomes across studies—lessons learnt from the ERACODA collaboration
Authors: Noordzij Marlies , Vart Priya , Duivenvoorden Raphaël , Franssen Casper F M , Hemmelder Marc H , Jager Kitty J , Hilbrands Luuk B , Gansevoort Ron T 
Published: January 2021

Abstract
Reported outcomes, such as incidence rates of mortality and intensive care unit admission, vary widely across epidemiological coronavirus disease 2019 (COVID-19) studies, including in the nephrology field. This variation can in part be explained by differences in patient characteristics, but also methodological aspects must be considered. In this review, we reflect on the methodological factors that contribute to the observed variation in COVID-19-related outcomes and their risk factors that are identified in the various studies. We focus on issues that arose during the design and analysis phase of the European Renal Association COVID-19 Database (ERACODA), and use examples from recently published reports on COVID-19 to illustrate these issues.
Branching process descriptions of information cascades on Twitter
Authors: Gleeson James P , Onaga Tomokatsu , Fennell Peter , Cotter James , Burke Raymond , O’Sullivan David J P 
Published: January 2021

AbstractA detailed analysis of Twitter-based information cascades is performed, and it is demonstrated that branching process hypotheses are approximately satisfied. Using a branching process framework, models of agent-to-agent transmission are compared to conclude that a limited attention model better reproduces the relevant characteristics of the data than the more common independent cascade model. Existing and new analytical results for branching processes are shown to match well to the important statistical characteristics of the empirical information cascades, thus demonstrating the power of branching process descriptions for understanding social information spreading.
Exploring Galleria mellonella larval model to evaluate antibacterial efficacy of Cecropin A (1-7)-Melittin against multi-drug resistant enteroaggregative Escherichia coli
Authors: Vergis Jess , Malik S V S , Pathak Richa , Kumar Manesh , Kurkure Nitin V , Barbuddhe S B , Rawool Deepak B 
Published: January 2021

ABSTRACT
High throughput in vivo laboratory models is need for screening and identification of effective therapeutic agents to overcome microbial drug-resistance. This study was undertaken to evaluate in vivo antimicrobial efficacy of short-chain antimicrobial peptide- Cecropin A (1–7)-Melittin (CAMA) against three multi-drug resistant enteroaggregative Escherichia coli (MDR-EAEC) field isolates in a Galleria mellonella larval model. The minimum inhibitory concentration (MIC; 2.0 mg/L) and minimum bactericidal concentration (MBC; 4.0 mg/L) of CAMA were determined by microdilution assay. CAMA was found to be stable at high temperatures, physiological concentration of cationic salts and proteases; safe with sheep erythrocytes, secondary cell lines and commensal lactobacilli at lower MICs; and exhibited membrane permeabilization. In vitro time-kill assay revealed concentration- and time-dependent clearance of MDR-EAEC in CAMA-treated groups at 30 min. CAMA- treated G. mellonella larvae exhibited an increased survival rate, reduced MDR-EAEC counts, immunomodulatory effect and proved non-toxic which concurred with histopathological findings. CAMA exhibited either an equal or better efficacy than the tested antibiotic control, meropenem. This study highlights the possibility of G. mellonella larvae as an excellent in vivo model for investigating the host-pathogen interaction, including the efficacy of antimicrobials against MDR-EAEC strains.