bluuebunny/crossref_metadata_2025_split huggingface dataset:
Endoscopic Third Ventriculostomy: A Single-Center Experience in Greece
Authors: Kontojannis V. , Papadopoulos E. , Ydreos J. , Isaakidis D. , Gavra M.M. , Boviatsis E.J. 
Published: May 2020

AbstractEndoscopic third ventriculostomy is an important tool in the treatment of various forms of adult hydrocephalus, and its use is evolving over the past years, proving in many cases more effective than the more traditional ventriculoperitoneal shunts. We present the experience from our department while comparing the results and complications with the international literature.
Premaxillary Deficiency: Techniques in Augmentation and Reconstruction
Authors: Shokri Tom , Wang Weitao , Cohn Jason E. , Kadakia Sameep , Ducic Yadranko 
Published: May 2020

AbstractProgressive premaxillary retrusion is a common sequela of the facial aging process. In most cases, this manifests with central maxillary recession. Central maxillary insufficiency is also commonly encountered within certain ethnic communities, or in cleft lip nasal deformity, and may represent a challenge for the plastic and reconstructive surgeon attempting correction in the setting of facial contouring, rhinoplasty, or reconstruction following oncologic resection or trauma. Aesthetically, premaxillary retrusion may be coincident with an acute nasolabial angle and ptotic nasal tip. Minor deformities may be addressed with use of either alloplastic implants, autogenous tissue, lipotransfer, or injectable filler. Larger composite defects may require reconstruction with implementation of free tissue transfer. Herein, we describe techniques that aim to augment, or reconstruct, the premaxillary region in the context of nasal deformity, osseous resorption, or composite maxillofacial defects.
Cultural productivism and public support for the universal basic income from a cross-national perspective
Authors: Kozák Michal 
Published: May 2020

ABSTRACT
It has been hypothesized that the capacity of universal basic income (UBI) to attract wider public support is impaired by the strength of productivist cultural norms and values, common to the majority of develope societies. The paper contributes to literature on attitudes towards UBI by empirically investigating this hypothesis from a multi-level cross-national perspective, using the European Social Survey (ESS) Round 8 data on UBI support for 23 countries. It seeks to determine whether and to what extent the strength of cultural productivism can explain cross-national variation in public support for the implementation of UBI. Two main findings are reported. First, the results demonstrate that the public are less susceptible to supporting UBI in countries where average employment commitment is higher. Second, the results show that, even though employment commitment is a strong predictor of cross-national variation in the public support for UBI, the effect is surpassed and explained by GDP, which itself is negatively related to the outcome. The study argues that the capacity of UBI to appeal to the general public is limited by the prosperity of post-industrial societies, rather than by the cultural attachment of their populations to paid work.
EURAMET supplementary comparison between INRiM and UME in Rockwell hardness scales (HRA - HRBW - HRC) - EURAMET.M.H-S1.a.b.c
Authors: Germak A , Kuzu C , Origlia C , Pelit E 
Published: May 2020

This report describes a bilateral EURAMET supplementary comparison on Rockwell hardness scales of two national metrology institutes of Italy and Turkey, INRiM and UME, respectively. The pilot laboratory is INRiM in the comparison where three sets of hardness reference blocks for the Rockwell hardness scales of HRA, HRBW and HRC were used. Each set of blocks consists of four hardness reference blocks for HRA and HRBW and five blocks for HRC hardness scales. The comparison was realized as planned in the Technical Protocol with some delay. The measurement results and uncertainty assessments declared by INRiM and UME are in consistency with each other.

Main text

To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/.
The final report has been peer-reviewed and approved for publication by the CCM, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).
Flex-printed forehead EEG sensors (fEEGrid) for long-term EEG acquisition
Authors: Blum Sarah , Emkes Reiner , Minow Falk , Anlauff Jan , Finke Andrea , Debener Stefan 
Published: May 2020

Abstract

Objective. In this report we present the fEEGrid, an electrode array applied to the forehead that allows convenient long-term recordings of electroencephalography (EEG) signals over many hours. Approach. Twenty young, healthy participants wore the fEEGrid and completed traditional EEG paradigms in two sessions on the same day. The sessions were eight hours apart, participants performed the same tasks in an early and a late session. For the late session fEEGrid data were concurrently recorded with traditional cap EEG data. Main results. Our analyses show that typical event-related potentials responses were captured reliably by the fEEGrid. Single-trial analyses revealed that classification was possible above chance level for auditory and tactile oddball paradigms. We also found that the signal quality remained high and impedances did not deteriorate, but instead improved over the course of the day. Regarding wearing comfort, all participants indicated that the fEEGrid was comfortable to wear and did not cause any pain even after 8 h of wearing it. Significance. We show in this report, that high quality EEG signals can be captured with the fEEGrid reliably, even in long-term recording scenarios and with a signal quality that may be considered suitable for online brain-computer Interface applications.
Optimization of harvesting solar cell energy based on MPPT to be applied during the rainy season in the tropics
Authors: Mairizwan  , Anshari Rio , Satria Dewi Wahyuni 
Published: May 2020

Abstract
Energy harvesting systems in solar cells require control to get maximum power, the maximum power control system is maximum power point tracking (MPPT). Energy efficient and effective harvesting is needed to avoid the energy absorbed by the control system. MPPT method with the Perturb and Observe (p&o) algorithm system. P&O method is a change in the value of a certain voltage and looking at the current value, this method is very effective to get the maximum power produced by solar cells. Energy that is absorbed by solar cells during the rainy season is very limited because the intensity and duration of sunlight to the surface of the solar cells is very small, therefore harvesting energy with the MPPT system can produce effective energy.
Genes and physical properties of iron sand from Kinali Pasaman
Authors: Fadhilah  , Prabowo Heri 
Published: May 2020

Abstract
West Coast of Sumatra island has a large amount of iron sand. Research in the Pariaman area and Agam Regency has been carried out, but for the Pasaman area it is not yet available. This research will reveal the iron sand genes found in Kinali Pasaman and find out physical properties such as: Grain size, Magnetization, Specific Gravity and magnetic susceptibility of the samples obtained. The purpose of this study is to provide information and data for the West Pasaman district government to bring in Regional Revenue / PAD (Royalty) as well as one of the solutions for PT Semen Padang in meeting its iron sand needs. The methodology used is to take 5 (five) iron sand samples systematically and represented at several points. The sampling point at the coordinates: 1.S004’46,49 “E99046’6,33”, 2. S005’8,93 “E99046’2,34”, 3.S007’39,40 “E99045’25,60”, 4. S008’20.60 “E99044’55.55”, 5. S008’39.00 “E99044’55.43”. The sample was analyzed for its physical properties at the UNP FT Mining Laboratory. The results of research on the physical properties of iron sand at Kinali Pasaman beach: sample size 0.425mm-0.15mm,% magnetization fraction from size of 0.425mm-0.075mm 20%-40%, specific gravity 2.9-3.5, and susceptibility 497.8-2644, 3 x 10-8m3kg-1 which shows iron sand is superparamagnetic.
Identification of magnetic minerals in the peatlands cores from Lake Diatas West Sumatra, Indonesia
Authors: Sasmita Amelia , Rifai Hamdi , Putra Rizaldi , Aisyah Nur , Phua Marcus , Eisele Steffen , Forni Francesca , de la Maisonneuve Caroline Bouvet 
Published: May 2020

Abstract
Peatlands in Lake Diatas can store various types of minerals. One of the mineral phases that can be found in peatlands are magnetic minerals derived from volcanic eruptions. This study was used to determine concentration of magnetic minerals found in peatlands. We applied the rock magnetism method, measuring the magnetic susceptibility of peat sediments to estimate the concentration of magnetic minerals within a peat core. Bartington Magnetic Susceptibility Meter type MS2C and dual frequency MS2B types, namely 470 Hz and 4.7 k Hz. In this study we analysed the magnetic susceptibility of core Diatas REP B at depths of 0-170 m and 240-720 m. From MS2B the values of low frequency magnetic susceptibility (χif
)and high frequency magnetic susceptibility (χhf
) are obtained. The magnetic susceptibility values ranged from 365,2 × 10−8 m3/kg to 386,8 × 10−8 m3/kg and the value of magnetic susceptibility depends on frequency (%χfds
) range between 0,6 % - 1,3%. These low values indicate that almost no superparamagnetic grains are present. We identified a positive peak in magnetic susceptibility 386,8 × 10−8 m3/kg at 693 cm, whereas the lowest values were messured 365,2 × 10−8 m3/kg at 675 cm. Based on the value of magnetic susceptibility, the dominant magnetic mineral phases are Hematite (Fe2O3) and ilmenite (FeTiO3).
Microwave absorbent properties of Fe3O4 nanoparticle from iron sand prepared by high energy milling ellips-3 dimension
Authors: Diana Sandra Rahma , Ikhsan Muhammad , Yohandri  , Dwiridal Letmi , Ramli Ramli 
Published: May 2020

Abstract
The development of nanoparticles magnetite in the world of research is now very rapid, The purpose of this research was to made Fe3O4 nanoparticles as microwave absorbent material. The Fe3O4 used in this study is magnetic oxide derived from nature in the form of iron sand. Tiram Beach one of the beaches in West Sumatera that contains iron sand exactly at Padang Pariaman District, Sumatera Barat. Nanoparticles Fe3O4 were made using the Higt Energy Milling Ellips-3 Dimenssion (HEM-E3D) method, with variations in milling time for 5, 15, 20, 25 and 30 hours. Fe3O4 nanoparticles are characterized using Vector Network Analyzer (VNA) to see the absorption properties of the microwaves. Analysis VNA result showed that the maximum value of reflection loss obtained in the samples milling 15 hours of -14.775 dB at a frequency of 11.700 GHz.
Digital based sit-up test instrument development
Authors: Saputra Sutrisno , Ihsan Nurul 
Published: May 2020

Abstract
The purpose of this study is to develop a digital-based Sit-Up Test instrument that is effective in use and is efficient in economic terms. This research is a development research with a model design adapted from Borg & Gall. With a population and sample of students of the Faculty of Sport Sciences, Padang State University, amounting to 10 people for small groups and 45 people for large groups, and 5 experts as validators for testing tools. validation. Data was collected using questionnaires and tool trials. Through the test of produck moment validity and reliability test of Test and Retest. The process of development and trial of this tool is done by validating experts by using questionnaires as an instrument of validation and obtained an average percentage of 96%, the results of small group trials obtained a correlation level of 0.99 and reliability tests with direct trials of 0,92 with a very strong reliability category
Chataliytic activity of nano ZnO/Cu for degradation humic acid under ilumination outdoor light
Authors: Mandar Sitiwi , Purnamsari Devi , Zainul Rahadian 
Published: May 2020

Abstract
One of the photocatalysts that is being developed for the degradation of humic acid is ZnO, because it is cheap, easy to obtain and the synthesis process is easy, large size ZnO has several disadvantages such as small surface area and energy band gap which are not suitable when applied to visible light. The research developed a method of making zno in nanometer size and composting to reduce bandgap. The maximum degradation of humic acid at nano ZnO doped Cu 7% which is equal to 54.12%. Nano characterization of nano ZnO doped Cu 7% doping using XRD and DRS UV-Vis spectra was found to be 27 nm and bandgap 5.27 eV.
Optimization of complex NH3 with Cu2+ ions to determine levels of ammonia by UV-Vis spectrophotometer
Authors: Guspita Desy , Ulianas Alizar 
Published: May 2020

Abstract
Ammonia analysis based on complexing ammonia with Cu2+ ions by UV-Vis spectrophotometry. This research aims to obtain uptake at the maximum wavelength of the copper-ammonia complex, optimum conditions and validation of UV-Vis spectrophotometry. The reaction between Cu2+ ions which are blue with ammonia colorless occur in solution to form complex compounds [Cu(NH3)4]2+ dark blue, the maximum absorbance is obtained at a wavelength of 615 nm. Optimization of the ammonia complexing the Cu2+ ions provide optimum conditions a solution of Cu2+ concentrations of 0.01 M in ammonia concentration of 0.04 M, pH 7, and the optimum time to form a complex occurred in the 30th minute and complex compounds can be stable for 90 minutes (± 1 hours 30 minutes). The analytical method validation ammonia using Cu2+ ions provide linear regression equation y = 4,772 x + 0.333 with R2 = 0.989 ammonia concentration range of 0.003 M to 0.08 M; LOD 0.01 M; LOQ 0.04 M; % RSD = 1.32%; and% recovery = 102.03%. The concentration of ammonia in the wastewater sample application obtained the ammonia concentration of 0.04 M. Based on the results of the validation, Ammonia solution with Cu2+ ion as a complex used for the determination of ammonia levels by UV-Vis spectrophotometry.
Analysis of Students Worksheet (LKPD) integrated science with the theme of the motion in life using integrated connected type 21st century learning
Authors: Marshel Joviana , Ratnawulan  
Published: May 2020

Abstract
This research is motivated by the demands of 2013 curriculum in government regulation of education and culture No. 22 of 2016 which requires the educators to design lesson plans and prepare media which suitable with the characteristics of 21st century learning. 21st century learning is learning that integrates literacy, knowledge, skills and attitudes which encourage students to think critically in problem solving, communicative, creative and collaborative (4C) through religious attitudes, cooperation, mutual cooperation, integrity and nationalism, so that the students will have high-level of thinking skills (HOTS). However, the reality in the field found in the preliminary study, the achievement of learning quality is still far from what is expected, it can be seen from the analysis of the Integrated Science LKPD used by students which is still not optimal in facing the challenges of the 21st century. The aim of this study is to analyze learning media in the development of Integrated Science LKPD with the theme of motion in life using integrated connected type 21st century learning. This research is a descriptive study with a qualitative approach. The sample of this study was the students of Junior High School 1 Lubuk Alung. The data used were primary data from interviews and questionnaires. The results of this study are the LKPD used by the school is still not suitable for the 21st century education character (4C). it can be seen from the science LKPD used by the students has not shown the critical thinking skills in solving problems which help them to improve the ability of higher order thinking skill (HOTS), and it also cannot fully help the students to express their conceptual and practical creative ideas.
Preliminary analysis of Edupark Sarasah Kajai Waterfall, Indonesia as a learning resources of works and energy
Authors: Yunita Rika Arni , Rifai Hamdi 
Published: May 2020

Abstract
Sarasah Kajai Waterfall is one of the potential of West Pasaman natural tourism that has been visited by tourists only to enjoy its beauty, even though this tourism are contains many physics concepts that can be used as learning resources for example potential energy. This advantage was not be used by teachers yet to make physics learning more interesting by observing the nature phenomenon directly. Unsuitable teaching materials would make students difficult to understand physics concepts. Therefore, a preliminary analysis of the characteristics of the students, regional potential, teacher competence and teaching material was carried out. This research use Plomp’s Development Model. Data were taken by using questionnaires and interviews teachers and students of SMAN 1 Pasaman and SMAN 2 Pasaman. Preliminary analysis showed that students prefer learning in nature using digital teaching materials. This is used as the basic for the development of digital teaching materials (e-books) based on edupark Sarasah Kajai waterfall as a learning resource in understanding physics concepts Works and Energy.
A meta-analysis study of the use of worksheet (LKS) based on research-based learning models
Authors: Utama Zaka Putra , Festiyed  
Published: May 2020

Abstract
This study aimed to determine the effect of the use (LKS) on the achievement of physical competence of learners. Its influence will be examined from several journals. This study used meta-analysis. Research shows that the use of meta-analysis LKS towards the achievement of more effective learners. The results showed the effect of size on the achievement of students with rigorous of several journals in the effect size obtained is average. It can be proved that the LKS can provide a considerable influence on the achievement of competence of learners.
Development of website on General Physics subject to increase analytical skills of students
Authors: Serevina Vina , Raihanati  , Andriana Wawan 
Published: May 2020

Abstract
This research aims to develop a website on General Physics subject to increase analytical skills of students. Developed website can be used by using computer or smartphone. The ADDIE research method which are Analyzing, Designing, Developing, Implement, and Evaluating. Research was conducted in Laboratory of Media Digital atState University of Jakarta for six months, starts from November 2018 until May 2019 with students of Physics Education Program, State University of Jakarta as object of research. Indicators of analytical skill measured in this research are giving a reasoning, making a conclusion, evaluating a conclusion, predicting a conclusion, considering the validity of an argument, and explaining something using data. Students’ analitycal skill improvement test was conducted by pre-test and post-test in two classes (class A and class B) with n-gain result of class A was 0,66 (medium) and class B was 0,28 (low). Results of validation test showed score 92,30% for material validation, 91,85% for media validation, and 90,37% for learning validation. According to this research result, can be concluded that developed website on general physics subject can increase students’ analytical skill. All of the instruments in this research can be seen at website http://vinnarrai.com
The validity of M-Learning based physics teaching materials to improve student learning access in the digital age
Authors: Amalia Shabrina , Pilendia Dwitri 
Published: May 2020

Abstract
The development of high-quality m-learning based physics teaching materials, needs validity from some experts, so that the product developed can be implemented in physics learning in senior high school. This research has purpose to test the validity of M-Learning based physics teaching materials to improve student learning access in the digital age. The type of this research is Research and Development. The development model used is the development procedure of Thiagarajan (4-D model) includes define, design, develop and disseminate. The assessment instrument used was in the form of a questionnaire consisting of three components, that are content, construct, and language. Based on the result of the study, the result of the feasibility test by expert lecturers and teachers obtained the feasibility of the product with a valid predicate so that it can be used as a source of senior high school physics learning.
Validation of Integrated Science Teacher book with the theme of the Human Body System Adaptation to Temperature Changes using Integrated Type of 21st Century Learning
Authors: Samra Aprili , Ratnawulan  
Published: May 2020

Abstract
This study aims to Determine the validation of the Integrated Natural Science teacher book with the theme senses of sight and optical devices using Integrated Integrated model of 21st Century Learning at the junior high school in Talamau district. This research method used research and development, using Plomp development models. The instrument used was a validation questionnaire. The collection of data validation technique uses a questionnaire that was previously validated by five validators. Data collected was Analyzed using qualitative descriptive through assessment and percentage. Results of analysis of the validation of the Integrated Natural Science teacher book with the theme senses of sight and optical devices using the Connected Integrated model of 21st Century Learning has an average value of 0.88 this is Showed that is developed was valid.
Validity of integrated science teacher’s book on junior high school based on character with the theme of cohesion and adhesion on living with shared model
Authors: Kendedes Tarinta Annisa , Ratnawulan  
Published: May 2020

Abstract
This research was motivated by many obstacles faced by teachers in the use of teachers books processed learning, ideally teacher book that refer to the curriculum 2013 can facilitate teachers in the learning process as well as showing the reference points that will be developed by competency standard of graduates, competency indicators and basic competencies of each subject are then put together in one theme, but actually many teacher books that have not fully facilitated the teacher for the learning process activities, one of which is the material presented has not shown integration between physics, biology and chemistry, the content of the material presented is also concise, making it difficult for the teacher if the material being taught is not the basis. Seeing these conditions, the researchers are interested in developing integrated science teacher books containing character based on shared models, the development of the teachers book is done so that the teacher is assisted in the learning process especially in theme cohesion and adhesion material in the class one on Junior High School. The purpose of this development is to produce integrated science teacher books containing characters with the theme of cohesion and adhesion on living with shared model with valid criteria. This type of research is development research using reeves model with stage analysis of practical problems, design and development the prototype, Iterative cycles of testing and refinement and implementation phase. The result of the development stage was produced by a valid teacher books with a criteria (≥0,6) and used in the implementation stage.