bluuebunny/crossref_metadata_2025 huggingface dataset:
La place des lipides dans les compléments nutritionnels oraux (CNO)
Authors: Bonhomme Cécile
Published: June 2019

La dénutrition touche 2 millions de personnes en France et a pour conséquence une augmentation des complications, des infections et du risque de mortalité ; en découle une qualité de vie fortement impactée, des capacités fonctionnelles diminuées et un risque de dépendance. Les compléments nutritionnels oraux (CNO), considérés comme des DADFMS, sont une des premières étapes de la re-nutrition, et restent une solution physiologique et non invasive à la dénutrition protéino-énergétique. Les CNO hypercaloriques et hyperprotéinés comblent le manque d’apport alimentaire, sans augmenter grandement les volumes d’aliments consommés. La formulation des CNO est encadrée par le règlement délégué (UE) 2016/128 sur les DADFMS. La HAS préconise que les CNO doivent apporter au moins 30 g de protéines et/ou 400 kcal par jour. A ce jour, de nombreux CNO sont proposés, afin de répondre aux besoins nutritionnels, aux textures adaptées et aux goûts des sujets dénutris. Selon la catégorie, les CNO contiennent des lipides, à hauteur de 26 à 42 % de l’AET et d’origines variées : colza, tournesol, lipides laitiers. Or, dans la prise en charge de la dénutrition, tous les lipides ne sont pas équivalents ; s’ils fournissent tous l’énergie indispensable, certains seraient impliqués dans la modulation de l’inflammation, d’autres dans l’équilibre de la flore intestinale ou des fonctions cognitives. Ils peuvent ainsi contribuer à l’efficacité des CNO dont le rôle majeur est l’amélioration du statut nutritionnel des patients afin qu’ils puissent être soignés plus efficacement.
Betreuung von Frühgeborenen und Neugeborenen mit Erkrankungen von Schwangerschaft bis Wochenbett
Authors: von Rahden Oda
Published: June 2019

Wird ein Kind zu früh oder krank geboren, stürzt dies die Eltern in eine akute Krise, die von Ängsten, Sorgen und Unsicherheiten gekennzeichnet ist [7]. Dies beeinflusst gravierend den Verlauf des Wochenbettes und den Bindungsaufbau zwischen Mutter / Eltern und Kind. Für eine optimale Betreuung müssen die besonderen Umstände des Wochenbetts nach einer Frühgeburt oder der Geburt eines kranken Kindes betrachtet werden. Teil 1 der Serie vermittelt Hintergrundwissen und Praxiserfahrung von der Schwangerschaft bis zur Geburt.
Postpartale psychische Störungen und ihre Bedeutung für die Wochenbettbetreuung
Authors: Weigl Tobias
Published: June 2019

Hebammen sind in der Zeit des Wochenbetts einfühlsame Ansprechpartnerinnen für Frauen mit postpartalen psychischen Störungen. Sie bieten den Müttern die Möglichkeit, vertraulich über schambehaftete Themen, Ängste und unangenehme Erinnerungen an die Geburt zu sprechen. So können sie früh einschätzen, ob eine postpartale psychische Störung vorliegt. Eine wichtige Grundlage, um betroffene Frauen in den ersten Wochen und Monaten nach der Geburt zu motivieren, bei Bedarf die Hilfe anderer Professionen zu suchen und anzunehmen.
Factors Associated with Intrapartum Cesarean Section in Women Submitted to Labor Induction
Authors: Pfützenreuter Glaucia Regina , Cavalieri Juliana Coutinho , Fragoso Ana Paula de Oliveira , Da Corregio Karine Souza , Freitas Paulo Fontoura , Trapani Alberto
Published: June 2019

Objective To evaluate the results of induced labor and to determine the main factors associated with intrapartum cesarean section after patients being submitted to this procedure at the Hospital Universitário of the Universidade Federal de Santa Catarina (HU/UFSC, in the Portuguese acronym), Florianópolis, state of Santa Catarina, Brazil.

Methods A retrospective cross-sectional study that included all the pregnancies that resulted in single-fetus births, whose gestational-age was > 22 weeks and that had been submitted to labor induction at the HU/UFSC in the period from 2013 to 2016.

Results During the proposed period, 1,491 pregnant women were submitted to the labor induction protocol. In 1,264 cases (84.8%), induction resulted in labor, with 830 (65.7%) progressing to vaginal delivery. Gestational age ≥ 41 + 0 weeks was the most common indication for induced labor (55.2%), and vaginal administration of misoprostol was the most commonly used method (72.0%). Among these pregnant women, the cesarean section rate was of 34.3%. Considering the cases of induction failure, the cesarean section rate rose to 44.3%. The factors associated with cesarean section were: previous history of cesarean delivery (PR [prevalence ratio] = 1.48; 95%CI [confidence interval]: 1.51–1.88), fetuses with intrauterine growth restriction (IUGR) (PR = 1.82; 95%CI: 1.32–2.19), Bishop score ≤ 6 (PR = 1.33; 95%CI: 1.01–1.82), and induction time either < 12 hours (PR = 1.44; 95%CI: 1.17–1.66) or > 36 hours (PR = 1.51; 95%CI 1.22–1.92) between the beginning of the induction and the birth.

Conclusion Labor induction was successful in most patients. In the cases in which the final outcome was a cesarean section, the most strongly associated factors were: previous history of cesarean delivery, presence of fetuses with IUGR, and either excessively short or excessively long periods of induction.
Endometrial Tuberculosis: Hysteroscopic Findings of a Clinical Case
Authors: Prado Daniela Siqueira , Cardoso Lucas Félix , de Maria Raimundo Dantas , de Santana Guilherme Machado , Marcelo Israel Santos , Lima Marcela Sampaio , Silva Ângela Maria
Published: June 2019

Endometrial tuberculosis is a rare diagnosis in the postmenopausal period, and it can mimic a carcinoma. The present article describes the case of a 54-year-old female patient with weight loss, abdominal pain, and ascites. An ultrasonography showed endometrial thickening, and a video hysteroscopy revealed a uterine cavity with formations with cotton aspect covering the entire endometrial surface and the tubal ostia. An anatomopathological evaluation diagnosed endometrial tuberculosis. The treatment was with a standardized therapeutic scheme (ethambutol, isoniazid, pyrazinamide and rifampicin), and the patient evolved with clinical improvement and normal uterine cavity at hysteroscopy. Considering the lack of pathognomonic hysteroscopic findings of the disorder, it is important to disclose the images of the case.
A meniscus fingering instability in viscoelastic fluids
Authors: Saintyves Baudouin , Mora Serge , Bouchaud Elisabeth
Published: June 2019

We report experiments where a viscoelastic fingering instability develops at the free interface between air and a model viscoelastic fluid confined in a Hele-Shaw cell. The fluid is symmetrically stretched with constant velocity along two opposite directions, leading to the inflation of a two-dimensional air bubble growing from a millimetric centered hole. The instability is observed when the circumferential stretch of the inflating bubble reaches a threshold that depends on the viscoelastic properties of the fluid through the ratio of the material relaxation time to the time elapsed before the fingers start to develop. The critical stretch of the bulk fingering instability of a stretchable elastic solid [B. Saintyves, O. Dauchot, and E. Bouchaud, “Bulk elastic fingering instability in Hele-Shaw cells,” Phys. Rev. Lett. 111, 047801 (2013)] is recovered for large values of this ratio.
Paf1C regulates RNA polymerase II progression by modulating elongation rate
Authors: Hou Liming , Wang Yating , Liu Yu , Zhang Nan , Shamovsky Ilya , Nudler Evgeny , Tian Bin , Dynlacht Brian David
Published: June 2019

Elongation factor Paf1C regulates several stages of the RNA polymerase II (Pol II) transcription cycle, although it is unclear how it modulates Pol II distribution and progression in mammalian cells. We found that conditional ablation of Paf1 resulted in the accumulation of unphosphorylated and Ser5 phosphorylated Pol II around promoter-proximal regions and within the first 20 to 30 kb of gene bodies, respectively. Paf1 ablation did not impact the recruitment of other key elongation factors, namely, Spt5, Spt6, and the FACT complex, suggesting that Paf1 function may be mechanistically distinguishable from each of these factors. Moreover, loss of Paf1 triggered an increase in TSS-proximal nucleosome occupancy, which could impose a considerable barrier to Pol II elongation past TSS-proximal regions. Remarkably, accumulation of Ser5P in the first 20 to 30 kb coincided with reductions in histone H2B ubiquitylation within this region. Furthermore, we show that nascent RNA species accumulate within this window, suggesting a mechanism whereby Paf1 loss leads to aberrant, prematurely terminated transcripts and diminution of full-length transcripts. Importantly, we found that loss of Paf1 results in Pol II elongation rate defects with significant rate compression. Our findings suggest that Paf1C is critical for modulating Pol II elongation rates by functioning beyond the pause-release step as an “accelerator” over specific early gene body regions.
The Effect of Multiple Intelligence-based Learning Strategies, Mathematical Logic and Naturalist toward Cognitive Learning Outcomes and Biological Retention of Students Grade X on Environmental Pollution Material
Authors: Diana Diah Mustika , Paidi
Published: June 2019

This study has purposes to: (1) determine the effect of learning strategies Logical-Mathematical (LM) on the learning outcomes and retention of students, (2) determine the effect of learning strategies of Naturalist (N) on the learning outcomes and retention of students, (3) determine the effect of the combination of learning strategies of Logical-Mathematical and naturalist on the learning outcomes and the retention of students. This study was a quasi-experimental research. The population in this study were all students of grade X SMA 6 Yogyakarta. The instrument used to collect the data was in the form of a multiple choice test to determine the mathematical and essay to determine the naturalist ability of students. Tests on the effect of learning strategies based Intelligence multiple logical mathematical and naturalist was conducted by using One Way Anova. The results of this study indicated that (1) The learning strategy of LM has an effect on the learning outcomes and retention of students, (2) learning strategies of N has an effect on the learning outcomes and has no effect on the retention of students, (3) the combination of learning strategies of LM and N did not affect the learning outcome of students but the has an affect on the retention of students.
The High School Biology Teachers Knowledge in Palu City to Framework the Technological Pedagogical and Content Knowledge
Authors: Setyorini Dwi , Astija  , Kasim A.
Published: June 2019

The knowledge of biology teachers for gathering the technology in learning is still lacking although supported by existing means. It is necessary first the data about the basic ability of teachers about framework TPACK by maximizing of using available technology that have been owned each schools. This study describes the knowledge of all biology teachers High School in Palu city for gathering framework TPACK. The method study was descriptive exploratory. Population of the study was all biology teachers of state high school in Palu city as many as 30 people, so the study were not used sampling. Data collecting by using questionnaire that afterwards analyzed by percentage with Likert Scale. In this research analyze 8 items that is TK (Technology Knowledge), CK (Content Knowledge), PK (Pedagogical Knowledge), PCK (Pedagogical Content Knowledge), TCK (Technological Content Knowledge, TPK (Technological Pedagogical Knowledge) and TPACK (Technological Pedagogical and Content Knowledge). The results of analysis obtained 77.54%, it means knowledge of biology teachers in gathering TPACK frame-teaching in high school in Palu city in good category.
Measuring Students’ Chemistry Literacy Ability of Acid and Base Concepts
Authors: Nurisa Ima , Arty Indyah Sulistyo
Published: June 2019

The goal of this study was to investigate Students’ levels of chemistry literacy ability on acid and base concepts. A quantitative descriptive method was used for this study. The subject of this study consisted of 251 second-year high school students in Yogyakarta. The data were collected by a test to measure chemistry contexts, chemistry knowledge, and chemistry competency aspects, and a questionnaire to measure attitude aspect that was developed in previous study. The students’ level of chemistry literacy for the aspects were in moderate level. Therefore, some sub aspects had a low and very low category, it might be caused by the lack of teachers’ ability to applied learning strategy for developing students’ chemistry literacy ability.
Investigating the Competencies of Technological Pedagogical Content Knowledge and Self-Efficacy of Chemistry Teachers
Authors: Bahriah Evi Sapinatul , Yunita L.
Published: June 2019

Technological Pedagogical Content Knowledge (TPACK) is an integration knowledge between technology, content of learning, and pedagogy which obtain to an integrated learning based on computer technology. Moreover, the pre-service teachers have a strengthen competencies of teachers integrating to knowledge, pedagogic, and technology. This research is aimed to investigate the Technological Pedagogical Content Knowledge competencies related to self-efficacy of chemistry teachers in Serang regency, Banten, Indonesia. Furthermore, the writers use a descriptive analysis as the research methodology. The sample of this research involves sixty-one chemistry teachers in the Senior High School level located at Serang city and Serang regency. To analyze the data, the writers provide a Likert scale. The result showed that the TPACK competencies scores in both Serang city and Serang regency raise up to 76.2 and 77.9 representatively. Whereas, the self-efficacy score in the two regions proved into 77.0 and 79.1 chronologically. Based on the data showed, it can be concluded that the relationship between TPACK and self-efficacy cannot be separated one another. Therefore, the Technological Pedagogical Content Knowledge (TPACK) and selfefficacy of the Chemistry teachers are comparable to the competencies of the Chemistry teachers.
The Analysis of Analogy use in Chemistry Teaching
Authors: Riskiani Yustika Rahayu Rr. , Sutrisno Hari
Published: June 2019

This study identifies students’ knowledge about analogies and to explore the potential analogies in chemistry learning. Some issues related to the use of analogies in teaching and learning are discussed. In this study, data were collected from recordings, and interviews. In the interviews, student answered question about chemistry concepts and analogies generally. In addition, the interview revealed that students liked the use of analogies in their classes and believed that they had a positive effect on their understanding of new concepts. According to them, a good analogy is an object or event that is in the natural surroundings, because it will be easier to remember. We present suggestions for improving classroom analogy use
The Implementation of Problem-based Learning Model with Online Simulation to Enhance the Student’s Analytical Thinking Skill in Learning Physics
Authors: Sari Ratna , Perdana R , Riwayani  , Jumadi  , Wilujeng Insih , Kuswanto Heru
Published: June 2019

The aim of this research is to enhance the student’s analytical thinking skill through the implementation of problem-based learning model with online simulation on optical devices subject, especially on a discussion about the eyes. The type of this research is a pre-experimental study. The research design is one group pre-test post-test design. The students who participated in this research were the students of class XI MIPA 4 in SMA Negeri 1 Prambanan Sleman Yogyakarta, Indonesia. The number of sample are 27 students. The sample is taken by using cluster random sampling technique. The test is an essay test about the eyes. The test is validated by expert’s judgement. The results of the test validity are valid and feasible to use. The test is used in pre-test and post-test. The result is problem-based learning model with online simulation can enhance the student’s analytical thinking skill, but the enhancement is in the low category.
The Effect of PjBL Model based on Skill Approach Process to Physics Critical Thinking Ability of High School Student
Authors: Rahim Azhar Chaeruddin , Jumadi  , Wilujeng Insih , Kuswanto Heru
Published: June 2019

This study was aimed at describing and determining the level of critical thinking skills of students using learning tools with a project based learning model based on material process skills approach to momentum and impulse in class X.4 (Modeling) and X.2 (Implementation) SMAN 1 Kalasang, Indonesia. This research was a Pre-Experiment Design research using the One-Shot Case Study Design research design. Research subjects were 48 students which obtained based on purposive sampling by looking at certain criteria and reasons. The results of the research data were obtained through critical thinking ability test instruments, learning device planning instruments, student worksheet instruments, and valid product assessment instruments, and instrument validation. Data collection techniques consisted of the preparation stage, implementation phase, and data collection stage. Data analysis techniques used were descriptive analysis and inferential analysis. The results showed that students’ critical thinking skills using learning tools with a project based learning model based on material process skills approach to the momentum and impulse of SMAN 1 Kalasang were in the good category (Modeling class with an average value of 75.20 and an Implementation class with an average value of 77.39). And there was increase in critical thinking skills after using learning tools with a project based learning model based on the process skills approach to material momentum and impulse of SMAN 1 Kalasang in the Modeling class as well as in the Implementation class.
Implementation of Problem Based Learning Model Assisted Edmodo to Measure Students Scientific Communication Skills
Authors: Afriani Devi , Wilujeng Insih , Jumadi  , Kuswanto Heru
Published: June 2019

This study aims to determine the scientific communication skills of students of SMA 6 Yogyakarta through learning Problem Based Learning assisted Edmodo. The sampling technique is through cluster random sampling, that is 2 classes randomly selected from the entire population, class X MIPA 6 as experiment classes and class X MIPA 8 as an implementation class using the same learning. Experiment classes given by the researchers themselves while the implementation class given by the subject teacher of physics at school. Each class was given learning one and the result is known that scientific communication skills of learners in experiment classes get good enough category and scientific communication skills of learners in the implementation class to get a good category.
Development of Android Comics media on Thermodynamic Experiment to Map the Science Process Skill for Senior High School
Authors: Sari Fita Permata , Ratnaningtyas L. , Wilujeng Insih , Jumadi  , Kuswanto Heru
Published: June 2019

Technological development influences smartphone addiction. Low academic achievement has a negative influence on school life. Comics include media that are often used in everyday life and as entertainment facilities. Comics are not only functioned as entertainment tools, but are also used in education. Physics laboratories are still minimally utilized by physics teachers in schools, so students’ science process skills are still lacking. The purpose of this study was to measure science process skills using Android-based physics comics on thermodynamic practicums. Development models used, namely R & D of Borg and Gall. Learning is done in the form of practicum on thermodynamic material. Android media use is used to measure science process skills. Physics learning innovation is applied in the XI science class of one of the senior high schools in Sleman, Yogyakarta, Indonesia. Data obtained from observation sheets of science process skills from modelling and implementation classes are very good; good; and enough. The results revealed that the application of Android comic media on thermodynamic experiment could map the science process skills of senior high school.
The Effect of Web-Assisted Problem Based Learning Model Towards Physics Problem Solving Ability of Class X Students
Authors: Apriliasari Rizky Nur , Jumadi  , Wilujeng Insih , Kuswanto Heru
Published: June 2019

This research aimed to determine the effect of web-assisted PBL model towards problem solving ability of class X students. This research was an experiment research or experiment study on two sample groups namely the experiment group and the control group. The research design was True Experimental with the Post-Test-Only Control Design form. This experiment research was conducted in class X MIA of SMAN 2 Yogyakarta. The samples used in this study were 30 students of class X MIA 8 as the experiment group and 30 students of class X MIA 9 as the control group. Based on the results of the Independent Sample T-Test, the two sample groups seen from Sig. (2-tailed) were worth 0.000 < 0.05, so H
0 was rejected and H
1 was accepted. The results of the effect test were calculated using Cohen’d Effect Size to determine the magnitude of the problem solving ability effect between the experiment class and the control class. The study was concluded that the web-assisted problem based learning model had a huge effect on the problem solving ability of class X students.
Learning with the Social Media Assisted Science, Technology and Society Approach to Improve Self-Learning Motivation
Authors: Maulana Avid Wahyu , Wilujeng Insih , Kuswanto Heru
Published: June 2019

Physics learning needs change to follow this era and motivate students to learn. The use of a combination of daily physics phenomena and the internet in learning can be a better solution to follow the recent era and motivate students. The method used in this study is research and development (R & D). Product of the development is learning media with Social Media Assisted Science Technology and Society (STS) Approach. The subjects of this study were students of SMAN 1 Kalasan Sleman Yogyakarta. This paper uses an independent learning motivation questionnaire instrument to obtain data. Analysis shows that the use of motivational learning media increases in good categories. The results of this study are the use of media using the social media assisted STS approach can increase the motivation of independent learning.
Enhancing Students’ Critical Thinking Skills through Physics Education Technology Simulation Assisted of Scaffolding Approach
Authors: Ferty Zera Nadiah , Wilujeng Insih , Jumadi  , Kuswanto Heru
Published: June 2019

This study aims to improve students critical thinking skills through Physics Education Technology Simulation assisted of Scaffolding approach. The study used the single pretest posttest group model (One Group Pretest Posttest) in one study class. Statistical test using paired sample t- test. The results of increased critical thinking skills were obtained based on percentage pretest and posttest results with descriptive analysis through criteria of critical thinking skills. Based on the result of t-test, the value of significance is 0.00, which is less than α (0.05) which means there is improvement of critical thinking skills through Physics Education Technology Simulation assisted of Scaffolding approach. The percentage of pretest value of 71% with good category and the percentage of Post-test score of 82% with very good category.
Physical Reasoning Ability Development of High School Students
Authors: Suhariyono  , Mardapi Djemari
Published: June 2019

This study has purpose to reveal: (1) the characteristics of physics subject test of high school students of grade X and XI, (2) the equality of vertical test of physics subject of high school students of grade X and XI, (3) the development of the ability of high school students of grade X to grade XI physics subject. The data which was in the form of scores were then processed and synchronized by using a common item non-equivalent groups design by the method of equalizing of mean and sigma based on the Rasch model. The results of this study are: (1) the validity of the physics subjects test of grade X is 0.92 and grade XI is 0.96 (2) the reliability tests is 0.928 for grade X and 0.926 for grade XI; (3) the results of the vertical equalization based on the approach of Rasch model showed the conversion equation for grade X to grade XI was b * = bx - 0.36; (4) there is a development of the ability of grade X students to grade XI students or the ability of grade XI students is higher than the ability of grade X students.
Using Socio-scientific Issues in Problem Based Learning to Enhance Science Literacy
Authors: Rubini Bibin , Ardianto D. , Setyaningsih S. , Sariningrum A.
Published: June 2019

Context issue in science learning can be referred as one of the solutions to improve students’ science literacy e.g. the socio-scientific issues. The socio-scientific context is presented in a problem where scientific knowledge and social awareness arise in mental conflicts that require science literacy to make responsible decisions. In addition, using problems in learning can provide opportunities for students to apply their knowledge in solving problems. Therefore, this paper discusses the usage of socio-scientific context in problem based learning to enhance students’ science literacy. We show that problem-based learning with the socio-scientific issue can improve students’ science literacy. Using socio-scientific issue makes it easier for students to make explanations of scientific phenomena.
Multimedia in Disaster Risk Reduction
Authors: Sejati Prajana Marwan , Budiningsih C. A. , Pujianto
Published: June 2019

This research aims to find out the comprehension in disaster risk reduction for students of Class IV and analysis the needs of learning media to improve the comprehension in disaster risk reduction. This research applies survey method. Subjects used in this research are teachers and students of Class IV at Sekolah Siaga Bencana in Cangkringan District, Sleman, Yogyakarta, Indonesia. Interview, test, questionnaire, and literature review are used for the data collecting techniques. The research results present that comprehension of the material of Disaster Risk Reduction of elementary Class IV has note fully well. The data presents: 63.09% - poor, 12.02% - pretty good, 18.45% - good, and 6.44% - very good. The research results that the attractive learning media are needed to improve the student’s comprehension. Multimedia is a kind of learning media, which has interactive space between the users and media. Through multimedia, students will learn the concept and strategy to reduce geological disaster risk. Therefore, applying multimedia in learning process has a potency to improve the comprehension of the reduction of disaster risk for students.
Development Student Activity Sheet of Natural Sciences with Authentic Inquiry Learning Approach to Improve Problemsolving Skills of Junior High School Students
Authors: Mouromadhoni Kasyfi Rifqi , Prasetyo Zuhdan Kun , Atun Sri
Published: June 2019

This study aims to determine the feasibility of the Student Activity Sheet with authentic inquiry learning approach based on the results of the expert judgment assessment and also the students’ responses as well as to determine the improvement of problem-solving skills. This research is a development research (R&D) with a 4-D (four-D) model. The stages of this research included to define, design and develop. Research subjects were the experts, science teachers, and students of class VIII B of SMPN 14 Yogyakarta. The research instruments used were the Student Activity Sheet of expert and teacher validation instrument, students’ responses instrument, problem-solving skills observation sheets, and problem-solving skills pretest-posttest. The analytical techniques used included the average score to determine the actual score, the conversion of scores into four categories, the calculation of the percentage of mastery of problem-solving skills and the gain score of the mastery of problem-solving skills. Furthermore, the Student Activity Sheet was developed and considered very good by experts and teachers as well as suitable for use in natural sciences learning. (2) The students gave very good responses to the Natural Sciences Subject Student Activity Sheet with authentic inquiry learning approach from the results of development, (3) the improvement of students’ problem-solving skills in Natural Sciences learning with authentic inquiry learning gained an increase of 17.8% and the gain score of 0.74 which is included in the “high” category.
Design of a PID control for a prototype of an automated GMAW welding bench
Authors: Trigos A E , Garcia-Guarin J , Espinel Blanco E E
Published: June 2019

This article describes parameters such as electrical currents, equipment voltage, separation distance between the welding gun and the piece to be welded, the electrode diameter, material thickness, and the travel speed of the welding application performed through the gas metal arc welding process. This is the main parameter for the automation of the process, To evaluate this parameter, a prototype of an automated gas metal arc welding bench was constructed, which consists of a mobile work table that secures the piece to be welded, and a structure that holds the welding gun in a fixed position, allowing during the welding the movement of the piece automatically at a speed estimated by the user. For this, ultrasound and speed sensors were used, together with the Labview-Arduino automation programs that simulate horizontal welding and finally, two proportional–integral–derivative calculation methods are compared: 1) Mathematical model of the system and 2) Calculation of the model of the plant based on actual data input voltage vs output speed. Unraveling with greater approximation the adjustment of parameters (Kc, Ti, Td), which allow for a speed designated by the operator, keeping stable the welding speed used in the gas metal Arc welding processes with respect to the piece to be welded.
Development of a prototype to monitor the temperature and pH in the fish farm at Francisco de Paula Santander Ocaña University
Authors: Sánchez Torres B , Rosado Gómez A A
Published: June 2019

In this document, the results of the development of a prototype for temperature and pH monitoring in the fish farm of the Francisco de Paula Santander University, Ocaña, is detailed, in order to provide an improvement to the processes related to the care of the environment of the fish in the fish farm, for this purpose, the Internet of Things is used, focused on agriculture, this has methodologies, materials and technologies that are analyzed in this document to select the most suitable for the development of the prototype and the points to consider for its implementation. Given that the application of a system focused on the problem expressed in the document can improve the quality of life of the fish not without first solving problems surrounding the internet of things focused on agriculture, as they are the power supply in rural areas and the creation of devices resistant to natural environments.
Model-based approach for agile requirements engineering using SysML and Papyrus
Authors: Cuesta B
Published: June 2019

This paper presents a model for the application of agile requirements engineering. The literature review made it possible to identify the requirements elicitation process based on standards such as capability maturity model integration, software engineering body of Knowledge and how their practices can complement those of agile methodologies, to reduce risk factors and guarantee the success of software projects. This process gives importance to the continuous communication with stakeholders in an iterative process, which is maintained throughout the project and begins with the identification of the problem domain, and then gradually refining characteristics and objectives in user stories and it ends with the development of the product backlog, which will serve as input to the application agile development process. The results propose a model, indicating the different stages for requirements engineering using the agile systems modeling language and the Papyrus tool.
Energetic analysis in traditional panelers burners
Authors: Garcia-Rincón J G , Guerrero Gómez G , Barrientos E
Published: June 2019

In North of Santander, panela production is carried out in traditional burners, where bagasse is used as fuel. This rudimentary and artisanal form is inefficient in energy terms. For the present study, three burner samples were selected, determining the biomass consumption and the energy assesment of the panela production process, for developing this, a virtual instrument was designed using the Lab View software with temperature sensors and data acquisition cards, which allowed the monitoring and recording of temperatures, finally the energy efficiency of each burner was evaluated.
Biodigestion: Alternative use of vegetable matter for obtaining biofuel in the province of Ocaña, Colombia
Authors: Valdes Solano D M , Alba Maldonado J M , Arenas A Armesto
Published: June 2019

The Catatumbo region offers a great variety of agricultural products on demand in the urban centers of the department of North Santander. Since in this locality there is no management or use for vegetable material wastes this study focused on the public market, represented by a wholesale and retail trade in agricultural products, the most representative being tomatoes and onions. This research prospects the potential for biodigesters as an alternative, based on anaerobic digestion for the production of bioethanol from lignocellulosic biomass from vegetable species of the Catatumbo region. An assessment of possible raw materials that exist within the region was carried out, determining operating conditions and estimative production of bioethanol.
Flame structure of dimethyl ether/O2/Ar mixture at 1 atm
Authors: Alyanova N , Bolshova T , Dmitriev A , Shvartsberg V , Knyazkov D , Shmakov A , Korobeinichev O
Published: June 2019

For diesel engines, dimethyl ether (DME) is widely used in the world, it is a perspective candidate to replace traditional diesel in the future. The consumption of DME as a motor fuel is constantly increasing. DME has a very low propensity to soot formation during combustion, which allows not only to reduce harmful emissions into the atmosphere, but also to improve the completeness of combustion. To validate available chemical kinetic models for DME combustion, in this work we report our experimental data on the chemical structure of a laminar premixed stoichiometric DME/O2/Ar flame stabilized at 1 atm on a flat burner. Flame sampling molecular beam-mass spectrometry is used to obtain spatial distribution of mole fractions of many species in the flame. The experimental data are compared with the calculation results obtained using PREMIX code and two detailed chemical kinetic mechanisms available from literature for DME combustion.
Behavior of Eu, Pu, U in utilization of radioactive graphite by ignition method in oxygen
Authors: Barbin N M , Kolbin T.S. , Terentyev D I , Alekseev S G
Published: June 2019

The behavior of some radionuclides (U, Eu, Pu) in the utilization of radioactive graphite by the combustion method in oxygen is considered. The study was carried out by thermodynamic modeling in the temperature range 300-3300 K. The main physicochemical processes occurring during oxidation were established.
Efficiency of technology of mechanically activated coal for ignition and lighting of pulverized coal boilers
Authors: Chernova G V , Burdukov A P , Butakov E B
Published: June 2019

To increase the energy efficiency of coal flaring, a technology with mechanochemical activation of coal by the mills is being developed at the Institute of Thermophysics SB RAS. The technology is aimed at increasing coal reactivity and can be used to replace high-reactive expensive and difficult-to-obtain fuel oil for ignition and lighting of pulverized coal boilers of thermal power plants (TPP) using mechanically activated microground coal. A technique for assessing the technical and economic efficiency of using the technology of mechanically activated microground coal is suggested. The investment attractiveness of replacing fuel oil ignition and lighting with mechanically activated microground coal on a number of pulverized coal boilers of thermal power plants of Siberia is presented.
Pulverized coal torch combustion in a furnace
Authors: Gorelikov E Y , Litvinov I V , Styuf A S , Shtork S I
Published: June 2019

Aerodynamics of flame combustion of a pulverized coal was studied experimentally using a laboratory setup with a thermal power of 25 kW. The axial and tangential velocity profiles were measured with the co-and counter-swirl of the first and second degrees of the burner. Averaged velocity profiles were measured by a two-component LDA system. The temperature was also measured on the walls and axis of sections of the pulverized coal burner. The temperature distributions were obtained at different coal dust flow rates as well as at co-and counter-swirl. The results obtained allow us to conclude about the efficiency of flow mixing at pulverized coal combustion.
Investigation of the dependence of the process of spontaneous combustion on the particle size of brown coal processing products
Authors: Kuznetsov Viktor , Goryunov Yury , Demenchuk Sergey , Magdeeva Olga , Neobyavlyayushchiy Pavel , Dekterev Alexandr
Published: June 2019

The paper presents the results of a study of the process of spontaneous combustion of partially carbonized lignite and sorbent from coal, depending on the particle size. To determine the critical conditions of spontaneous combustion and the effective kinetic parameters of the process proceeding along the thermal mechanism, a special experimental setup was used. The results of the study indicate the influence of particle size on the time of spontaneous combustion and on the rate of oxidation of coal matter. A mathematical model of spontaneous combustion of coal matter is developed. The model uses the spatial nonstationary heat conduction equation, in which the heat release in the process of coal oxidation is taken into account by setting a heat source based on the experimentally obtained kinetic parameters of the spontaneous combustion process - effective activation energy and the pre-exponential factor.
Optimisation of combustion process in furnace of coal-fired boiler PK-38 using Computational Fluid Dynamics
Authors: Orlik E.V. , Mezhov E.A. , Tsepenok A.I. , Kvrivishvili A.R.
Published: June 2019

In 2016 and 2017, AO Machine Building Factory of Podolsk jointly with OOO ZiO-COTES realised the projects for the retrofit of boilers PK-38 Nos.3A, 4B at the Nazarovo GRES power plant. A range of implemented technical solutions [1] allowed reach stable continuous operation of boiler PK-38 at the Nazarovo GRES at loads as high as 270 t/h and significantly reduced nitrogen oxide emissions. Development of the burners system and combustion modes, as well as estimation of nitrogen oxides emissions has been performed using three-dimensional computational fluid dynamics modelling.
Household, community, sub-national and country-level predictors of primary cooking fuel switching in nine countries from the PURE study
Authors: Shupler Matthew , Hystad Perry , Gustafson Paul , Rangarajan Sumathy , Mushtaha Maha , Jayachtria K G , Mony Prem K , Mohan Deepa , Kumar Parthiban , PVM Lakshmi , Sagar Vivek , Gupta Rajeev , Mohan Indu , Nair Sanjeev , Varma Ravi Prasad , Li Wei , Hu Bo , You Kai , Ncube Tatenda , Ncube Brian , Chifamba Jephat , West Nicola , Yeates Karen , Iqbal Romaina , Khawaja Rehman , Yusuf Rita , Khan Afreen , Seron Pamela , Lanas Fernando , Lopez-Jaramillo Patricio , Camacho Paul A , Puoane Thandi , Yusuf Salim , Brauer Michael
Published: June 2019

Introduction. Switching from polluting (e.g. wood, crop waste, coal) to clean (e.g. gas, electricity) cooking fuels can reduce household air pollution exposures and climate-forcing emissions. While studies have evaluated specific interventions and assessed fuel-switching in repeated cross-sectional surveys, the role of different multilevel factors in household fuel switching, outside of interventions and across diverse community settings, is not well understood. Methods. We examined longitudinal survey data from 24 172 households in 177 rural communities across nine countries within the Prospective Urban and Rural Epidemiology study. We assessed household-level primary cooking fuel switching during a median of 10 years of follow up (∼2005–2015). We used hierarchical logistic regression models to examine the relative importance of household, community, sub-national and national-level factors contributing to primary fuel switching. Results. One-half of study households (12 369) reported changing their primary cooking fuels between baseline and follow up surveys. Of these, 61% (7582) switched from polluting (wood, dung, agricultural waste, charcoal, coal, kerosene) to clean (gas, electricity) fuels, 26% (3109) switched between different polluting fuels, 10% (1164) switched from clean to polluting fuels and 3% (522) switched between different clean fuels. Among the 17 830 households using polluting cooking fuels at baseline, household-level factors (e.g. larger household size, higher wealth, higher education level) were most strongly associated with switching from polluting to clean fuels in India; in all other countries, community-level factors (e.g. larger population density in 2010, larger increase in population density between 2005 and 2015) were the strongest predictors of polluting-to-clean fuel switching. Conclusions. The importance of community and sub-national factors relative to household characteristics in determining polluting-to-clean fuel switching varied dramatically across the nine countries examined. This highlights the potential importance of national and other contextual factors in shaping large-scale clean cooking transitions among rural communities in low- and middle-income countries.
Tackling Environmental Pollution through Participatory Approach in Nambo, South Tangerang, Indonesia
Authors: Dewi OC , Atmoko TU , Alrasyid HA , Priyandana D , Dewi MBV , Siska D
Published: June 2019

A participatory approach is well-known for its time-consuming and no-instant approach. Tackling environmental pollution directly from its source in an urban area by participatory approach is very critical. Universitas Indonesia’s Community Engagement Program together with the City Without Slum or Kotaku Program in South Tangerang City, Banten Province, Indonesia, conducted in Kampung Nambo. This joint program carried out in two lines through the local government and the community by a bottom-up approach. The inhabitants of the neighbourhood involved through a charrette process. The outcome of the charrette is the guideline of the new master plan development of Kampung Nambo that responding to tackling the pollution created in the kampung. This master plan will use as a parameter for the Kampung Nambo development program. A team of experts that consists of the local government, the university scholars, the NGO, and the inhabitants joined together for the implementation plan under the intensive and an interactive designated workshop. It concluded that this approach is valuable to integrate the unplanned urban areas development, which happened quite vast in some Indonesian cities and towns. Thus, it helps to reduce the urgency of environmental degradation in the kampung, through awareness and educational campaign. This approach is challenging yet it is a long-term investment.
Constructing a Framework for Economic Value of Urban Renewal in Taiwan
Authors: Hsu Kuo-Wei , Chao Jen-Chih
Published: June 2019

Following a phase of early prosperity, Taiwan’s urban centers have slowly declined, resulting in the hollowing-out of business districts and declining populations, and prompting widespread interest in urban redevelopment. To improve the quality of urban environments, not least in terms of disaster prevention, the central government’s urban-renewal policy is aimed at re-inspiring local development via the introduction of funds and dynamism from the private sector. However, progress has been slow because potential private-sector partners tend to measure projects’ merit and performance chiefly in financial terms, and the economic value of urban renewal remains notoriously difficult to quantify. Accordingly, this study proposes a complete economic-value framework for urban renewal in Taiwan through secondary-data methods. Specifically, this framework consists of three facets and six factors, of which the land-use value facet (comprising the land and real-estate value factors) relates to the strength of the local economy; the energy-conservation value facet’s two factors are energy-use and carbon-emissions reductions; and the disaster-prevention value facet consists of reducing the likelihood of disasters, and reducing their impact.
Feasibility study of municipal solid waste for producing refuse-derived fuel (RDF): A case study of Bangkok, Thailand
Authors: Eaktasang N , Suma Y , Kingkeaw S
Published: June 2019

The objective of this study was investigated the potential of municipal solid waste (MSW) to produce refuse-derived fuel from Bangkok municipality. The composition, heating value and proximately content were analyzed. The amount of MSW in Bangkok generated was approximately 4.86 million tons or 13,327 tons/day in 2017. About 79.5% was disposed by landfill and 20.5% was recycled. The compositions of MSW were biodegradable (49.58%), combustible (36.32%) and non-combustible (14.10%) wastes. Moisture content was 59.5±8.6% (as received), volatile matter, fixed carbon and ash were 72.4±3.2%, 8.2±0.5% and 19.4±0.5% (as dry basis), respectively. Heating value was 20.03±0.52 MJ/kg. These results indicated that MSW from Bangkok municipality is potential to produce the refuse-derived fuel. To reduce the environmental impacts as well as energy recovery, the MSW might be alternative sources of renewable energy in the future.
In Situ Aerobic Biodegradation In Soil Contact Using The Standard Test Method of ASTM D 5988-12
Authors: Al-Salem S.M. , Al-Nasser A. , Sultan H. , Karam H.
Published: June 2019

With an over growing problem of plastic waste accumulation, Kuwait faces a serious threat to its natural resources. Latest estimates show that plastic solid waste (PSW) is generated at an alarming rate of over 200 ktpa, making up over 16% of the total municipal waste load. In this paper, the standards test method of ASTM D 5988-12 for determining the degree and rate of biodegradation of plastics in contact with soil was applied to three commercial plastic products sourced locally. The plastic samples are claimed to be of biodegradable nature by the manufacturer and the converter. The test method was applied in situ using analytical desiccators and have proven to be a good indicator to biodegradable measurements. In addition to technical control and reference tests, the test method was also applied on the natural soil secured from the field simulating the largest operating landfill site. The test has proven to be reliable and has produced repeatable results. The biodegradation extent was noted to be very rapid and can be described by comparison to other works as accelerated. This was attributed to both what is described by this work as external and internal factors of the polymer-soil matrix. The former can be noted as environment and soil characteristics, pH level and presence of contaminants in the biota. On the other hand, the latter can be described as type of soil (mixture) ratio, polymer surface area and carbon dioxide (CO2) evolution kinetics which were noted to be of a first order with respect to biodegradation time and dissolution.