bluuebunny/crossref_metadata_2025_split huggingface dataset:
The use of Radon (Rn222) isotopes to detect groundwater discharge in streams draining Table Mountain Group (TMG) aquifers
Authors: T Strydom  , JM Nel  , M Nel  , RM Petersen  , CL Ramjukadh  
Published: April 2021

Environmental isotopes have been used for decades as natural tracers in studies aimed at understanding complex hydrogeological processes such as groundwater and surface water interactions. Radon (Rn222) is a naturally occurring, radioactive isotope which is produced from radium (Ra226) during the radioactive decay series of uranium (U238). Since U238 is present in most geological substrates, Rn222 is produced in various lithological structures and subsequently transported with groundwater through fractures and pore spaces in an aquifer towards surface water discharge points in rivers and springs. This study aimed to determine (i) the concentration of Rn222 within both surface water and groundwater in Table Mountain Group (TMG) aquifer systems, and (ii) the feasibility of using Rn222 isotopes as a natural tracer in groundwater-surface water interaction studies. This study was conducted in a highly fractured TMG aquifer system near Rawsonville, South Africa. Surface water from two perennial rivers (i.e. Gevonden and Molenaars), together with groundwater from a nearby borehole, were sampled and their corresponding Rn222 concentrations measured. Our study found median Rn222 concentrations in the Gevonden River of 76.4 Bq∙L-1 and 67.2 Bq∙L-1 in the dry and wet seasons, respectively. Nearly 12% of surface water samples exceeded 100 Bq∙L-1. These abnormally high Rn222 concentrations can only be attributed to the influx of groundwater with extremely high Rn222 concentrations. Under ambient (no pumping) conditions, Rn222 concentrations in groundwater range between 130–270 Bq∙L-1. However, when the borehole was pumped, and inflowing water from the surrounding aquifer was sampled, even higher Rn222 concentrations (391–593 Bq∙L-1) were measured. These extremely high Rn222 concentrations in groundwater are believed to be attributed to the underlying granitic geology and the prevalence of faults. The use of Rn222 isotopes as an environmental tracer in groundwater–surface water interaction studies is therefore regarded as a feasible option in similar highly fractured aquifer systems.
Medidas de Tendência Central: Análise da Qualidade das Questões do ENEM de 2016 a 2018
Authors: Emidio Andrade Soares Talita , Junio Marques Soares Denilson , Dos Santos Wagner 
Published: April 2021

ResumoO Exame Nacional do Ensino Médio (ENEM) tem se constituido como uma das principais políticas de avaliação da qualidade da educação básica brasileira. A expansão do exame e as atribuições a ele investidas tornaram imprescindíveis as discussões acerca da sua estrutura e qualidade. Com o intuito de contribuir para esta temática, este artigo tem o objetivo de analisar a qualidade de 11 itens de Matemática das provas do ENEM de 2016 a 2018, que se referem às Medidas de Tendência Central: média aritmética simples e ponderada, mediana e moda. Para isto, adotou-se uma metodologia predominantemente quantitativa e exploratória, desenvolvida a partir da aplicação de técnicas psicométricas a uma amostra representativa de participantes do exame. Os resultados apontaram para itens adequados e bem estruturados, que privilegiam o raciocínio lógico e a interpretação. A análise pedagógica indicou para a comum confusão entre os conceitos de média aritmética simples e ponderada, que representam a grande maioria dos itens analisadas. Espera-se que os resultados obtidos possam esclarecer alguns conceitos da psicometria e auxiliar no processo de ensino e aprendizagem de estatística na educação básica.
Palavras-chave: Medidas de Tendência Central. Psicometria. Análise de Itens. ENEM.
AbstractThe National High School Examination (ENEM) has become one of the most of the main Brazilian quality evaluation policies in the field of basic education. The expansion and attributions invested in the test make indispensable the discussions about its structure and quality. In order to contribute to this theme, we propose to analyze 11 Maths questions to ENEM from 2016 to 2018 and related to Measures of Central Tendency: arithmetic mean; weighted arithmetic mean, median and mode. It was used a quantitative and exploratory methodology, developed through psychometrics methods applied to a significant sample of students that made the exam. The results pointed to well-structured items, that favor logical reasoning and interpretation and that have an excellent ability discriminate groups with different levels of. Its highlight the confusion between concepts of arithmetic mean and weighted arithmetic mean, that represent the most of the questions analyzed. It is hoped that this research may help clarify some concepts of psychometry and can assist in the teaching-learning process of statistics in basic education.Keywords: Measures of Central Tendency. Psychometry. Item Analysis. ENEM.
Estudos Sobre o Desenvolvimento Profissional de Professores
Authors: Müller Ana Paula Krein , Quartieri Marli Teresinha 
Published: April 2021

ResumoCom o intuito de identificar aproximações com a pesquisa intitulada que está sendo desenvolvida por uma aluna no Doutorado em Ensino, foi realizado um levantamento bibliográfico para conhecer que tipos de estudos estão sendo efetivados com temas relacionados a esta investigação. Com o objetivo realizar uma revisão sistemática em pesquisas que descrevem intervenções com o foco na “formação de professores”, “desenvolvimento profissional”, de modo a identificar como essa associação tem sido tratada na literatura Realizou-se uma busca nas revistas classificadas com A1 no Portal de periódicos da Capes no período de 2013 a 2018, selecionando os títulos que se aproximavam com os temas discutidos nesta pesquisa: “formação de professores” e “desenvolvimento profissional”. Com a análise dos artigos, percebeu-se a necessidade de pesquisas com período maior de formação, buscando formar um professor reflexivo, preocupado em aprimorar sua prática pedagógica, a importância da participação do grupo de professores, a troca e compartilhamento de ideias e atividades, além de alguns apontamentos como em relação a durante dos momentos de formação que podem ser importantes para a constituição de uma formação continuada que busca o desenvolvimento dos professores participantes.
Palavras-chave: Desenvolvimento Profissional. Formação de Professores. Prática Pedagógica. Estudo Bibliográfico.
Abstract: In order to identify similarities with the research entitled that is being developed by a student in the Doctorate in Teaching, a bibliographic survey was carried out to find out what types of studies are being carried out with themes related to this investigation. In order to carry out a systematic review of research that describes interventions with a focus on "teacher training", "professional development", in order to identify how this association has been treated in the literature. A search was made in journals classified with A1 in the Capes journals portal from 2013 to 2018, selecting the titles that approached the topics discussed in this research: “teacher training” and “professional development”. With the analysis of the articles, there was a need for research with a longer period of training, seeking to train a reflective teacher, concerned with improving his pedagogical practice, the importance of the participation of the group of teachers, the exchange and sharing of ideas and activities, in addition to some notes such as in relation to during the training moments that may be important for the constitution of a continuing education that seeks the development of the participating teachers.
Keywords: Professional Development. Teacher Training. Pedagogical Practice. Bibliographic Study.
Reducing Unemployment, Poverty and Promoting Empowerment through Skills Acquisition (TVET): A Case Study of Returnee Migrants
Authors: Ohagwu Onyekachi , Hassan Zamri bin Hj , Carlo Dolly Paul 
Published: April 2021

This paper explains recent statistics and phenomena related to returnee migrants in Edo state, Nigeria. The significance of this paper is that it creates awareness on causes and motives behind irregular migration leading to repatriation (returned migrants). Based on data gathered from most research participants (returnee migrant) – the quest to improve one’s socioeconomic living conditions are the motives behind most Nigerians’ migration journey (regular or irregular) to western countries (i.e., Europe, Canada, USA, etc.). The socioeconomic imbalance in Nigeria is mainly caused by the high rate of unemployment and poverty; thus, the majority of Nigerians are of the opinion that migrating to western countries, is a potential pathway to an improved socioeconomic living condition. This paper further suggests – skill acquisition (TVET) as an approach to reduce unemployment and poverty; thus, economically improving the socioeconomic living conditions of the majority of Nigerians.
Study of serum ferritin in type 2 DM patients in north Gujarat
Authors: Modi Gaurav D , Parmar Jigar A , Gajjar Margit G 
Published: April 2021

Diabetes mellitus is a metabolic disorder in which metabolism of various trace elements is being altered. Present study has been carried out to determine association between serum ferritin and type 2 diabetes mellitus. To analyze level of serum ferritin in type 2 diabetes mellitus patients in comparison with healthy controls. The present cross-sectional study was carried at Clinical Chemistry Laboratory, department of Biochemistry, GMERS Medical College and Hospital, Vadnagar, Gujarat. There were 100 cases having minimum 5 years history of type 2 diabetes mellitus residing at North Gujarat. There were 100 healthy controls in this study. GOD-POD (Glucose Oxidase- Peroxidase) method was used for estimation of Glucose.Nephelometry method was used for estimation of Ferritin and HbA1c. In comparison to healthy controls; Serum ferritin level was found high in Type 2 DM patients. High level of serum ferritin was found in patients of type 2 diabetes mellitus patients who have poor glycemic control.
Association between thyroid hormones & lipid profile in type 2 diabetes mellitus patients- A case control study in tertiary care hospital
Authors: Juliette A Veena , P Pangajam 
Published: April 2021

Diabetes mellitus & thyroid dysfunction are the most common endocrinological disorders in the current era. Diabetes mellitus is a group of metabolic disorders usually associated with dyslipidemia which increases risk of cardiovascular disorders and resultant morbidity & mortality. Thyroid dysfunction particularly hypothyroidism is frequently encountered in diabetic patients. T2DM results in reduction in thyroid releasing hormone (TRH) synthesis & limits T3 & T4 production, which results in increased total cholesterol & LDL in circulation. By studying the association of thyroid hormones & lipid profile in diabetes patients, we can enhance the knowledge about the interrelation between diabetes, thyroid hormones & dyslipidemia.To study the association between thyroid hormones & lipid profile in Type 2 Diabetes Mellitus patients. This is a case control study comprising of 50 cases (T2DM) & 50 age & sex matched healthy controls. Fasting blood sample was taken and analysed for blood sugar, lipid profile, Triiodothyronine(T3), Thyroxine(T4) & TSH.In this study, higher serum level of total cholesterol, LDL-cholesterol & triglycerides seen in T2DM patients. Also significantly lower T3&T4 and higher TSH are observed in T2DM. Moreover, there was a significant positive correlation between TSH and TC, LDL-C and TGL & significant negative correlation between T3&T4 and TC, LDL-C & TGL. Thyroid dysfunction is associated with lipid dysregulation in T2DM patients. Early & routine screening of thyroid disorders in T2DM patients can reduce morbidity due to dyslipidemia.
Study of TSH and prolactin in PCOS subjects: A case control study
Authors: P Latha , Ravi B V , Sadaria Roshni 
Published: April 2021

To assess serum TSH and Prolactin in women with PCOS in comparison with healthy women as controls and to find correlation between TSH & Prolactin in PCOS subjects. : A comparative study including 30 women diagnosed as PCOS and 30 age and BMI matched healthy women as controls was conducted. The age group for the study was 18-35 years. Fasting blood samples were drawn to measure serum thyroid stimulating hormone(TSH) and prolactin. Mean TSH and prolactin were found elevated in the PCOS cases compared to controls but they were not statistically significant. No significant correlation was found between TSH and prolactin. We could not find any significant correlation between serum TSH and serum prolactin. Further, studies with larger number of PCOS subjects will be beneficial. However monitoring of Prolactin & TSH in PCOS should be done.
PENERAPAN SUPERVISI AKADEMIK UNTUK MENINGKATKAN KOMPETENSI GURU DALAM MENYUSUN ADMINISTRASI PENILAIAN DI UPTD SDN TAMBERU TIMUR KECAMATAN SOKOBANAH KABUPATEN SAMPANG
Authors: Den Hod 
Published: April 2021

ABSTRAKTujuan penelitian tindakan kepala sekolah ini adalah untuk meningkatkan kompetensi pedagogik guru-guru di UPTD SDN Tamberu Timur kecamatan Sokobanah kabupaten Sampang dalam menyusun administrasi penilaian melalui supervisi akademik. Jenis penelitian yang digunakan dalam penelitian ini adalah penelitian tindakan sekolah. Kegiatan dalam penelitian ini terdiri atas tahapan perencanaan tindakan, pelaksanaan tindakan, observasi, dan refleksi.Teknik pengumpulan data menggunakan teknik obeservasi kelas.Instrumen observasi yang digunakan adalah alat penilaian kemampuan guru (APKG) berupa Instrument penilaianadministrasi pembelajaran . Analisis data yang digunakan adalah teknik analisis deskriptif komparatif. Data kuantitatif yang diperoleh di deskripsikan dalam bentuk kata-kata atau penjelasan. Selanjutkan dilakukan komparasi data untuk memastikan ada tidaknya peningkatan kemampuan guru dalam penilaian administrasi pembelajaran. Hasil penelitian menunjukkan temuan bahwa supervisi akademik dapat meningkatkan kemampuan guru-guru dalam menyusun administrasi penilaian dalam pembelajaran di UPTD SDN Tamberu Timur kecamatan Sokobanah kabupaten Sampang sebesar26,2%.Kata kunci: supervisi akademik, kompetensi pedagogik ABSTRACTThe aim of the principal's action research was to improve the pedagogical competence of teachers in the UPTD SDN Tamberu Timur, Sokobanah sub-district, Sampang district in preparing administrative assessments through academic supervision. This type of research used in this research is school action research. The activities in this study consisted of the stages of action planning, action implementation, observation, and reflection. Data collection techniques used classroom observation techniques. The observation instrument used was a teacher ability assessment tool (APKG) in the form of a learning administration assessment instrument. The data analysis used was a comparative descriptive analysis technique. The quantitative data obtained are described in the form of words or explanations. Continued data comparisons to ensure whether there is an increase in the ability of teachers in learning administration assessment. The results showed the findings that academic supervision can improve the ability of teachers in compiling administrative assessments in learning at the UPTD SDN Tamberu Timur, Sokobanah sub-district, Sampang district by 26.2%.Keywords: academic supervision, pedagogic competence
Pemanfaatan Energi Arus Laut Pada Teluk Awerange Sebagai Sumber Energi Alternatif Yang Bekerlanjutan
Authors: Husain Firman , Widianingrum Windi 
Published: April 2021

Indonesia memiliki luas laut 96.079 km2 dan panjang garis pantai sebesar 99.093 km, membuat Indonesia memiliki potensi untuk memanfaatkan laut sebagai sumber energi baru terbarukan. Namun pemanfaatan energi baru terbarukan saat ini baru mencapai 6,2% pada tahun 2015. Salah satu energi laut yang dapat dimanfaatkan adalah arus laut. Teluk Awerange yang terletak di Sulawesi Selatan merupakan titik yang memiliki sumber energi laut dan dapat dimanfaatkan menjadi energi terbarukan berkelanjutan yang ramah lingkungan. Kecepatan arus di wilayah Teluk Awerange dalam kondisi surut dapat mencapai 0,25 – 0,36 m/s. Sehingga dapat memungkinkan untuk menggunakan energi pasang surut dengan menggunakan turbin. Turbin Kobold memanfaatkan arus dari air laut pada Teluk Awerange. Dengan menggunakan turbin bi-directional (dua arah) yang menggerakkan turbin searah jarum jam maupun sebaliknya. Turbin yang dipasang secara horizontal pada dasar laut dapat mengubah energi kinetik dari turbin menjadi energi listrik saat pasang surut, menjadikan turbin layak digunakan sebagai pembangkit energi listrik tenaga pasang surut laut. Sebagai sampel berdasarkan Kementrian ESDM energi arus dapat menghasilkan 1,2 MW/turbin. Keuntungan besar dari turbin bi-directional adalah bahwa bilah baling-baling tidak perlu dibalik ketika arah aliran berubah. Hal ini membuat desain yang kuat, lebih murah untuk membangun, dirawat dan resiko kerusakan lebih rendah. Juga turbin dua arah rata-rata menghasilkan dua kali energi listrik dari yang dihasilkan oleh turbin uni-directional, yang hanya berfungsi selama pasang surut atau banjir.
Effectiveness of argument-driven inquiry (ADI) learning model on students' creative thinking skill: Environmental pollution
Authors: Afifa Inas Nuha , Hasnunidah Neni , Maulina Dina 
Published: April 2021

ADI learning model supports syntax of learning process through investigative activities of environmental pollution problems and their impact on the ecosystem. The model implements practicum to challenge students' creativity in presenting the results of practicum through students' arguments. The purpose of this study was to analyze the influence of ADI learning model and evaluate the students' creative thinking skills. This was a quasi-experiment study with a pretest-posttest non-equivalent control group design. Sample was taken with cluster random sampling technique, 42 students were divided into 2 classes in 7th junior high school at Global Madani School, Bandar Lampung. Results were analyzed using covariance analysis and the effect size was measured by the partial eta-squared value. Aspects of creative thinking skills that were measured: fluency, flexibility, originality, elaboration, and metaphorical thinking. The result shows application of ADI learning model had significant effect in improving students' creative thinking skills with a significance value of 0.013 (sig.<0.05). The effect of implementing the ADI learning model had high effectiveness in improving the students' creative thinking skills with partial eta squared value of 0.147 which was categorized as large (sig ≥ 0.14). Therefore, ADI learning model has an effect on improving students 'creative thinking and had an impact on high effectiveness in improving students' creative thinking. Finally, the learning model is recommended for Biology teachers to increase students' creative thinking skills effectively.
Protocols for assessing the distribution of pathogens in individual Hymenopteran pollinators
Authors: de Miranda Joachim R , Meeus Ivan , Yañez Orlando , Piot Niels , Jara Laura , Onorati Piero , Rúa Pilar De la , Nielsen Anders , Tlak-Gajger Ivana , Özgör Erkay , Dalmon Anne , Gajda Anna , Neumann Peter , Smagghe Guy , Paxton Robert J 
Published: April 2021

Abstract
This protocol was developed for the COST-Action “Super-B”, whose purpose was to coordinate research, outreach and policy towards sustainable pollination1-3. The protocol addresses the detection of parasites and pathogens across bee species, as one of several possible drivers of bee decline4,5. It consists of four major components:1. A sample collecting protocol, based around a dominant bee species driving pathogen distribution among other bee species2. A sample processing protocol, based on analyzing nucleic acids from individual bees3. A pathogen detection protocol, based on RT-qPCR with broad-range primers for several common pathogens4. A barcoding protocol, for accurate bee species identification The protocols have largely been adapted from existing knowledge and protocols but also include two key innovations: the use of passive reference nucleic acids and synthetic positive controls, that significantly improve the quality and robustness of the raw data, and thus the reliability of the analyses and conclusions.
A Sociological study of Teachers’ Views on the Applications of ICT and Prerequisites for Realizing it in Classrooms in Tehran
Authors: Larijani Mahsa , Abedi Maliheh 
Published: April 2021

Abstract
Introduction: Nowadays virtual education and the use of technology have been incorporated into the process of educating students and are used in most countries of the world. The present study aims to investigate teachers’ views on the capabilities and weaknesses of ICT and study its prerequisites based on teachers’ narrations.Method: To achieve this aim, qualitative deep interviews were conducted with 20 teachers with at least 5 years of experiences in teaching and using ICT. In order to conduct this research, six different high schools in Tehran were selected.Findings: The results of this study indicate that the use of ICT is a unique experience reported by teachers and for its realization, prerequisites such as providing finance for creating smart schools, equipping schools, providing incentives for teachers, technology into schools (or classifications of the ICT by teachers) includes three parts, namely, resistance and refusal to use, adaptation, and innovation. In the present research, teachers have described the negative and positive aspects of the application of ICT in teaching.Conclusion: The finding of this study showed that to facilitate teachers’ use of ICT, teaching subjects, enhancing ICT application knowledge, and changing teachers’ attitudes are essential. And by accepting ICT, it also facilitates the ICT- based education process.
Pattern formation in a reaction-diffusion rumor propagation system with Allee effect and time delay
Authors: Zhu Linhe , He Le 
Published: April 2021

Abstract
This paper analyzes the diffusion behavior of the suspicious and the infected cabins in cyberspace by establishing a rumor propagation reaction diffusion model with Allee effect and time delay. The Turing instability conditions of the system under various conditions are emphatically studied. After considering the delay effect of rumor propagation systems, we have studied the correlation between the stability of the system under the influence of small time delay and the homogeneous system near the equilibrium point, and the critical condition of the delay-induced spatial instability is given. Further considering the possibility of diffusion coefficient changing with time, the critical parameter curves of stability and instability of approximate systems are given by means of Floquet theory, and the necessary conditions of Turing-instability of periodic coefficient are studied. In the numerical simulations, we find that the variation of diffusion coefficient will change the pattern type, and the periodical diffusion behavior will affect the arrangement of the crowd gathering area in the pattern.