bluuebunny/crossref_metadata_2025 huggingface dataset:
Proton Beam Multiplexer Developments for Multi-Target Operation at the High-Brilliance Neutron Source HBS
Authors: Rimmler Marius , Baggemann Johannes , Doege Paul , Felden Olaf , Mauerhofer Eric , Rücker Ulrich , Soltner Helmut , Tölle Raimund , Zakalek Paul , Gebel Ralf , Gutberlet Thomas , Brückel Thomas
Published: March 2020

The High-Brilliance neutron Source project (HBS) aims at developing a medium-flux acceleratordriven neutron source based on a 70 MeV, 100mA proton accelerator. The concept intends to optimize the facility such that it provides high-brilliance neutron beams for instruments operating at di_erent time structures. This can be realized by three di_erent target stations irradiated with di_erent proton pulse sequences. The appropriate proton pulses will be distributed by a Multiplexer unit. In the following, we present the integration of this Multiplexer with the HBS beam optics as well as ongoing developments of this unit and several components of the Multiplexer at the COSY facility in Jülich.
Diffusion bonded Be neutron target using 8MeV proton beam
Authors: Kurihara Toshikazu , Kobayashi Hitoshi
Published: March 2020

The development of the high intensity compact neutron source is mainly conducted by using accelerators for medical purposes. Recently, a lot of compact neutron sources have been developed, and most of them are for boron neutron capture therapy (BNCT). Compared with the common accelerators used for industries, accelerators for BNCT have to accelerate a 100 times larger current of charged particles because of the low conversion efficiency of neutron moderators. To attain a reliable target for the BNCT neutron source, two obstacles have to be overcome; radiation damage (blistering) and heat issue. We introduce diffusion bonding method aiming to make defect free Be neutron target and 1 MPa latent heat water-cooling system. We also install beam expansion optics using quadrupole and octupole magnets to reduce the charge density. Our facility has been operating for more than three years from the commissioning period and we report the recent situation as following. 1) Diffusion bonding method was applied to the solid neutron target of Be with latent heat cooling system. 2) Amount of integrated coulomb value of protons implanted to the Be target is nearly 3000 C now 3) Amount of neutron dose rate was measured. 4) A laser reflection microscope (LRM) method has been developed to observe the neutron target condition (especially radiation damage) through viewport with a few meters working distance. 5) Direct observation of the surface of the Be target was done during the period of improving nearly target vacuum and residual radiation conditions. From these evidences, we conclude our neutron target already produces neutrons capable to treat nearly 500 patients of malignant melanoma.
Studies on Reflector Materials for Cold Neutrons
Authors: Granada J. Rolando , Márquez Damián J. Ignacio , Helman Christian
Published: March 2020

Neutron scattering techniques and neutron applications in general are powerful and well-established tools for research in science and technology. However, those are highly intensity-limited techniques and the need to reduce the neutron loses between their source to detection is then an imperative endeavor. In particular, great effort has been devoted to the development of efficient ways to transport and guide neutron beams, as well as to reduce the flux leakage in the non-emitting sides of moderator systems. In this work we investigate and confirm by calculation in a real material the great quality of diamond nanoparticles as reflector for ultra-cold and very-cold neutrons, and propose the use of Magnesium Hydride at a low temperature as a very good reflector for cold neutrons
Study on Moderation Properties of Cold Mesitylene using KUANS
Authors: Tasaki Seiji , Idobata Yuma , Adachi Yuya , Funama Fumiaki , Abe Yutaka
Published: March 2020

Neutron moderation properties from the cold mesitylene moderator have been studied. Kyoto University Accelerator driven Neutron Source has been used for these experiments. The container of the mesitylene moderator is situated in front of the polyethylene moderator and the change of the time of flight spectrum has been recorded as a function of the temperature of the mesitylene moderator. By fitting the Maxwell distribution to the obtained TOF spectra, the neutron temperature corresponding to the mesitylene temperature is estimated.
Tour d’horizon des systèmes avancés de propulsion nucléaire
Authors:   La SFEN, Proust Éric
Published: March 2020

Avec les multiples projets de conquête martienne et pour explorer les confins du système solaire et au-delà, la propulsion nucléaire fait un retour en force. Elle ouvre un large champ d’applications, notamment pour raccourcir les durées des « voyages ». Un sujet présenté à l’occasion d’une journée organisée par le CNES, le CEA et la SFEN, à Paris le 24 janvier 2020.
Alimenter en électricité les missions spatiales : un défi à la hauteur du nucléaire
Authors: Campioni Guillaume , Guidez Joël
Published: March 2020

Augmentation importante des acteurs (notamment privés), diversité des projets et des débouchés : le secteur dit du New Space est en pleine croissance économique depuis une quinzaine d’années. Les acteurs institutionnels traditionnels, c’est-à-dire étatiques, doivent désormais tenir compte de ces nouveaux entrants à très fort potentiels. Parallèlement, la demande en énergie disponible dans l’espace va croître énormément dans les années à venir. Et qui dit énergie dans l’espace dit… nucléaire.
À l’approche de la planète Mars
Authors: Heidmann Richard
Published: March 2020

15 juillet 1965 : pour la première fois, un engin, la sonde américaine Mariner 4 survole la planète Mars. Notre voisine est encore nimbée de mystère. Les canaux et la civilisation martienne chère à Ray Bradbury n’ont certes plus la cote depuis longtemps, mais certains scientifiques persistent à croire en la possibilité d’une forme de vie martienne. Cruelle désillusion : sur Mars, pas de canaux, pas de lacs ou de mers, mais des cratères qui la font ressembler à la Lune. Pourtant, la grande vague d’exploration robotique, formée dès le début de l’ère spatiale, ne s’arrêtera pas, avec une cinquantaine de lancements vers la planète rouge en un demi-siècle.
Leveraging the mathematics of shape for solar magnetic eruption prediction
Authors: Deshmukh Varad , Berger Thomas E. , Bradley Elizabeth , Meiss James D.
Published: March 2020

Current operational forecasts of solar eruptions are made by human experts using a combination of qualitative shape-based classification systems and historical data about flaring frequencies. In the past decade, there has been a great deal of interest in crafting machine-learning (ML) flare-prediction methods to extract underlying patterns from a training set – e.g. a set of solar magnetogram images, each characterized by features derived from the magnetic field and labeled as to whether it was an eruption precursor. These patterns, captured by various methods (neural nets, support vector machines, etc.), can then be used to classify new images. A major challenge with any ML method is thefeaturizationof the data: pre-processing the raw images to extract higher-level properties, such as characteristics of the magnetic field, that can streamline the training and use of these methods. It is key to choose features that are informative, from the standpoint of the task at hand. To date, the majority of ML-based solar eruption methods have used physics-based magnetic and electric field features such as the total unsigned magnetic flux, the gradients of the fields, the vertical current density, etc. In this paper, we extend the relevant feature set to include characteristics of the magnetic field that are based purely on the geometry and topology of 2D magnetogram images and show that this improves the prediction accuracy of a neural-net based flare-prediction method.
Die bikuspide Aortenklappe
Authors: Sakellaropoulos Stefanos , Baumgartner Thomas , Mitsis Andreas , Yuan Xun , Nienaber Christoph A.
Published: March 2020

Die bikuspide Aortenklappe ist der häufigste kongenitale Herzfehler und gleichzeitig die häufigste angeborene Fehlbildung der Aortenklappe bei Erwachsenen. In dieser Übersichtsarbeit werden die verschiedenen Aspekte der bikuspiden Aortenklappe einschließlich ihrer Komplikationen unter klinischen Gesichtspunkten dargestellt.
DGHO 2019: Akute Graft-versus-Host Erkrankung
Authors: Bubenzer Rainer
Published: March 2020

Die akute Graft-versus-Host-Erkrankung (aGvHD) entsteht bei 30–60 % der Patienten, die eine allogene hämatopoetische Stammzelltransplantation erhalten und trägt zu 15–30 % der Todesfälle bei. Obwohl es mittlerweile zahlreiche Risiko-Scores gibt, die auch in therapeutischen Algorithmen verwendet werden, sind diese Scores in ihrer Aussagekraft hinsichtlich des Gesamtüberlebens insuffizient, meinte Dr. Dr. Amin Turki, Essen, auf der DGHO-Jahrestagung 2919. Zahlreiche neuere Konzepte unter Berücksichtigung zum Beispiel von Epithelschäden, prädiktiven Biomarkern oder Maschinenlernen (ML) könnten jedoch die Risikoeinschätzung verbessern.
IKCS 2019: Metastasiertes Nierenzellkarzinom
Authors: Kretzschmar Alexander
Published: March 2020

Etwa jeder 5. Patient mit einem metastasierten Nierenzellkarzinom (mRCC) hat zum Zeitpunkt der Diagnose bereits asymptomatische Hirnmetastasen. Darauf weist eine retrospektive Analyse von 68 Studien hin, die Ende 2019 auf dem International Kidney Cancer Symposium (IKCS) in Miami vorgestellt wurde.
IKCS 2019: Duale PD-1/L1-Inhibition beim metastasierten Nierenzellkarzinom
Authors: Kretzschmar Alexander
Published: March 2020

Mit einer dualen immuntherapeutischen PD-1/L1-Inhibition kann die Response bei Patienten mit metastasiertem Nierenzellkarzinom (mRCC) im Vergleich zu einer anti-PD-1-Therapie nicht regelhaft erhöht werden. Darauf weist eine Phase-I/II-Studie hin, die auf dem International Kidney Cancer Symposium (IKCS) vorgestellt wurde. In der Studie wurde eine Kombination des investigativen PD-1-Inhibitors MEDI0680 plus dem anti-PD-L1-Antikörper Durvalumab mit einer Monotherapie mit Nivolumab bei immuntherapienaiven Patienten verglichen.
Maxillary protraction in adult cleft lip and palate by a rigid external distraction device with dentoskeletal anchorage
Authors: Akarsu Bengisu , Taner Tulin , Tuncbilek Gokhan , Mavili M. Emin
Published: March 2020

Objective: The objective is to evaluate the effects of maxillary distraction osteogenesis (DO) in an adult patient with unilateral cleft lip and palate (UCLP) by using a rigid external distraction (RED) device with dentoskeletal anchorage.

Method: 31-year-old male patient with UCLP with severe maxillary hypoplasia, dolichofacial growth pattern, negative overjet and 1.5 mm openbite. After pre-surgical orthodontic treatment, an intra-oral appliance was modified to prevent extrusion of the molars and clockwise rotation of the mandible. Stainless steel plates were soldered bilaterally to the intra oral appliance at the level of canines. During surgery, miniplates were inserted in the maxillary segment and fixed to the plates of the intra oral appliance with screws.

Results: The mean distraction length was 12 mm immediately after DO. SNA increased from 73o to 82o after distraction. A significant advancement of the maxilla and correction of the sagittal Class III skeletal relationship was achieved. The vertical position of the mandible and the face was kept stable, and the soft tissue profile became more balanced.

Conclusion: This intra oral appliance design achieved desired skeletal changes during maxillary protraction with RED device in dolichofacial CLP patient. Occlusion and facial profile changes was found to be stable in 1-year follow-up. (Eur J Dent 2012;6:206-211)
Selective trapping of positrons by Ag nanolayers in a V/Ag multilayer system
Authors: Qi N. , Zhang H. X. , Chen Z. Q. , Ren F. , Zhao B. , Jiang M. , Uedono A.
Published: March 2020

V/Ag nano-scaled multilayers were prepared by using a magnetron sputtering deposition method. Each layer of Ag and V has a thickness of about 6 nm, and the total thickness of the multilayer film is 350 nm. Doppler broadening of annihilation radiation was measured by using a slow positron beam to study the microstructure of the above samples. It was found that the Doppler broadening S and W parameters measured in the V/Ag multilayers were close to those measured in the Ag reference sample. Coincidence Doppler broadening measurements also showed that the electron momentum distributions in V/Ag multilayers and Ag monolayer were almost identical. This suggests that Ag has a strong affinity to positrons, and almost all the positrons ejected into the multilayers are confined to the Ag nanolayers. Theoretical calculations indicate that the positron wavefunction is well localized in the Ag nanolayer even for a layer thickness of only 1 nm.
Recategorisation of body mass index to achieve andrological predictive power: a study in more than 20 000 patients
Authors: Ramírez Nicolás , Molina Rosa Inés , Tissera Andrea , Luque Eugenia Mercedes , Torres Pedro Javier , Bianconi Santiago , Beltramone Fernando , Sad-Larcher José , Estofán Gustavo , Mangeaud Arnaldo , Martini Ana Carolina
Published: March 2020

The aim of this study was to recategorise body mass index (BMI) in order to classify patients according to their risk of semen abnormalities. Patients (n=20563) presenting at an andrology laboratory were classified into five groups according to BMI: underweight (BMI <20kg m−2), normal weight (BMI 20–24.9kg m−2), overweight (BMI 25–29.9kg m−2), obese (BMI 30–39.9kg m−2) and morbidly obese (BMI >40kg m−2). Semen quality was evaluated to determine: (1) differences between groups using analysis of variance (ANOVA); (2) the chances of semen abnormalities (using generalised linear models, Chi-squared tests and odds ratios); (3) reference BMI values with andrological predictive power (multivariate conglomerate analyses and multivariate analysis of variance (MANOVA)); and (4) expected values of abnormalities for each new group resulting from BMI recategorisation. Morbidly obese and underweight patients exhibited the highest decrease in semen quality and had higher chances of semen abnormalities. The smallest number of sperm abnormalities was found at a BMI of 27kg m−2. Four reference values were identified, recategorising BMI into four groups according to their risk of semen abnormalities (from lowest to highest risk): Group1,BMI between 20 and 32kg m−2; Group2, BMI <20 and BMI >32–37kg m−2; Group3, BMI >37–42kg m−2; and Group4, BMI >42kg m−2. A BMI <20 or >32kg m−2 is negatively associated with semen quality; these negative associations on semen quality increase from a BMI >37kg m−2 and increase even further for BMI >42kg m−2. The BMI recategorisation in this study has andrological predictive power.
The pest-management attitude (PMA) scale: a unidimensional and versatile assessment tool
Authors: Aley Joanne P. , Milfont Taciano L. , Russell James C.
Published: March 2020

Abstract
ContextPest species are a widespread environmental and biodiversity threat and understanding people’s attitudes towards managing pests is critical for nature conservation. Attitudes towards pest species and their management are often contextually dependent on the species and location, and no domain-free measure is currently available. This prevents straightforward comparisons of studies and generalisation of attitudes towards pest species globally.
AimUndertake initial psychometric tests of a unidimensional pest-management attitude (PMA) scale in three community samples from the two largest cities of New Zealand. The PMA scale comprises statements intentionally absent of specific reference to pest species or pest-management methods, and avoids terminology that has the potential to become outdated, as a result of evolving management methods and technology or the emergence of new pests. This broad focus aims to enable the ongoing use of the scale, within differing geographical contexts.
MethodTwo studies tested the psychometric properties of the PMA scale. Tests comprise assessing the scales dimensionality through exploratory and confirmatory factor analysis, and measurement equivalence across samples. Internal consistency was tested through Cronbach’s α, and demographic and context-specific measures were used to validate the scale using correlation measures.
ResultsExploratory and confirmatory factor analyses confirmed the nine-item, one-factor model of the PMA scale in Study 1 (n=1190). Measurement and structural invariance of the one-factor model was confirmed across two distinct samples in Study 2 (n=739 and 705). Internal consistency (Cronbach’s alphas=0.73 to 0.81) and criterion-related validity of the PMA scale was supported in both studies, with greater PMA scores being associated with membership of a conservation or environmental organisation, active participation in conservation over the past 12 months, active actions for pest control, and not owning a pet.
ConclusionsResults demonstrated high construct and criterion validity of the PMA scale, which might have powerful global utility as a context-independent measure of attitudes to pest species and their management.
ImplicationsThrough generalising the social components of pest management, regardless of target species or method, there is potential to unify global studies in pest management.
A root-and-pattern approach to word-formation in Chinese
Authors: Cheng Gong , Liu Ying
Published: March 2020

This paper argues that compounding, the major source of word-formation in Chinese, and the root-and-pattern system in Hebrew involve fundamentally the same syntactic operations and observe the same locality constraints, despite the salient differences. More specifically, it addresses the well-known continuum that the coordinate and attributive compounds behave more like words, whereas resultative and subordinate compounds are much more like phrases. It puts forward the idea that this continuum can be accounted for by assuming that there is a distinction between word-formation from roots and word-formation from words, with the former giving rise to more lexical properties and the latter more phrasal properties. The paper also discusses some related issues, such as the correct formulation of word-level phases and the structure of the major types of compound words in Chinese.
Case markers and language contact in the Gansu-Qinghai linguistic area
Authors: Zhou Chenlei
Published: March 2020

This paper examines the forms and usage of case markers in the Gan-Qing dialects, the Amdo Tibetan and Altaic languages in the Gansu-Qinghai linguistic area (GQLA), including datives, accusatives, absolutives, comitatives, instrumentals, ablatives, locatives, genitives, comparatives and reflexive possessives. We come to two conclusions: (1) most markers in Gan-Qing dialects are widely distributed, but some are narrowly distributed and (2) case markers in Gan-Qing dialects are overwhelmingly from the Chinese inventory rather than direct copied from Amdo Tibetan or Altaic languages. These findings enable us to shed light on the situation of language contact in the GQLA and illustrate that there are two major strata of contact in the GQLA.
Transfer in L3 acquisition
Authors: Eibensteiner Lukas
Published: March 2020

The present study examines the influence of L2 English on the acquisition of perfective and imperfective aspect in L3 Spanish among German-speaking learners. We will argue that English will be activated as the default transfer source due to principles of acquisition, which are similar for both the L2 and the L3, and because of structural similarities between both languages. The analysis is based on data from 36 German-speaking learners with varying levels of knowledge of aspect in English, their L2, and learning Spanish. For data elicitation, two semantic interpretation tasks were used. The findings show that aspectual knowledge in L2 English affects the acquisition of L3 Spanish past tenses. However, the positive effect is not comprehensive, but rather, restricted to certain semantic contexts (e.g., past/perfective contexts). The discussion points to the possible effects of oversimplified one-to-one-mappings of form and meaning between L2 English and L3 Spanish.
Values that stories in self-improvement books promote
Authors: Koay Jeremy
Published: March 2020

This article examines characteristics of stories in self-improvement books and the values they promote. The analysis of 36 stories from four self-improvement books shows that they are used to illustrate advice. By focusing on grammatical features (e.g., personal pronounyou, interrogative clauses) in the story components (e.g., evaluation, coda), my study shows that these stories promote the idea that individuals, as the primary agent, are responsible for improving their lives (i.e., happier and more fulfilled lives). A study of the coda components also shows that human beings are viewed as having the ability and freedom to choose to improve their status quo. My study shows that stories in self-improvement books are a resource for promoting values.
The dynamics of entropic uncertainty for three types of three-level atomic systems under the random telegraph noise
Authors: Xu Xiong , Fang Mao-Fa
Published: March 2020

We study the dynamics of the entropic uncertainty for three types of three-level atomic systems coupled to an environment modeled by random matrices. The results show that the entropic uncertainty in the Ξ type atomic system is lower than that in the V type atomic system which is exactly the same as that in the Λ type atomic system. In addition, the effect of relative coupling strength on entropic uncertainty is opposite in Markov region and non-Markov region, and the influence of a common environment and independent environments in Markov region and non-Markov region is also opposite. One can reduce the entropic uncertainty by decreasing relative coupling strength or placing the system in two separate environments in the Markov case. In the non-Markov case, the entropic uncertainty can be reduced by increasing the relative coupling strength or by placing the system in a common environment.
Two integrable generalizations of WKI and FL equations: Positive and negative flows, and conservation laws*
Authors: Geng Xian-Guo , Guo Fei-Ying , Zhai Yun-Yun
Published: March 2020

With the aid of Lenard recursion equations, an integrable hierarchy of nonlinear evolution equations associated with a 2 × 2 matrix spectral problem is proposed, in which the first nontrivial member in the positive flows can be reduced to a new generalization of the Wadati–Konno–Ichikawa (WKI) equation. Further, a new generalization of the Fokas–Lenells (FL) equation is derived from the negative flows. Resorting to these two Lax pairs and Riccati-type equations, the infinite conservation laws of these two corresponding equations are obtained.
Asymmetric stochastic resonance under non-Gaussian colored noise and time-delayed feedback*
Authors: Shi Ting-Ting , Xu Xue-Mei , Sun Ke-Hui , Ding Yi-Peng , Huang Guo-Wei
Published: March 2020

Based on adiabatic approximation theory, in this paper we study the asymmetric stochastic resonance system with time-delayed feedback driven by non-Gaussian colored noise. The analytical expressions of the mean first-passage time (MFPT) and output signal-to-noise ratio (SNR) are derived by using a path integral approach, unified colored-noise approximation (UCNA), and small delay approximation. The effects of time-delayed feedback and non-Gaussian colored noise on the output SNR are analyzed. Moreover, three types of asymmetric potential function characteristics are thoroughly discussed. And they are well-depth asymmetry (DASR), well-width asymmetry (WASR), and synchronous action of well-depth and well-width asymmetry (DWASR), respectively. The conclusion of this paper is that the time-delayed feedback can suppress SR, however, the non-Gaussian noise deviation parameter has the opposite effect. Moreover, the correlation time plays a significant role in improving SNR, and the SNR of asymmetric stochastic resonance is higher than that of symmetric stochastic resonance. Our experiments demonstrate that the appropriate parameters can make the asymmetric stochastic resonance perform better to detect weak signals than the symmetric stochastic resonance, in which no matter whether these signals have low frequency or high frequency, accompanied by strong or weak noise.
The Development Of E-Modules Based on Adobe Flash For Indonesian Subjects At IAIN Bukittinggi
Authors: Mulyadi  , Syahrul R , Atmazaki  , Agustina
Published: March 2020

This study was done by the result of observation at IAIN Bukittinggi, it was found that Indonesian learning activities generally only use conventional media that are simple, in the form of a blackboard and powerpoint text. Learning tends to use lecture methods and conventional modules in the form of hardcopy modules in the learning process, it causes the students to feel bored, have difficulty understanding conventional modules and are less motivated during the learning process. The purpose of this study is to develop teaching material in the form of an Indonesian e-module that is valid, practical, effective and can motivate students to learn independently in improving student learning achievement. The development of this Indonesian e-module passes the ADDIE stages, namely (1) Analysis; (2) Design; (3) Development; (4) Implementation; (5) Evaluation. Products were developed include lecturer guidance book consisting of syllabus and SAP, students guidance book and Indonesian e-modules. Based on the results of internal consistency test and implementation, the product developed was categorized as very valid with a score of 86.47, the product developed was also categorized as very practical with a score of 90.40, and very effective with a score of 93.02. Based on the results of the validity, practicality, and effectiveness of the development of e-modules in Indonesian subject it can be concluded that e-modules have excellent validity, practicality and effectiveness.
Augmented Reality as The Learning Media of Fundamental Chemistry on An Android Smartphone
Authors: Sari Rindang Kembar , Derta Sarwo , Wahyuni Ilham , Efriyenti Liza , Kamus Zulhendri
Published: March 2020

Smartphone technology can be used as an innovative and promising learning media that is believed to be able to keep up with the times. Static learning media can be transformed into more dynamic learning media and can display object visualizations. One technology that can be utilized is Augmented Reality technology. Augmented reality technology is a visual technology that combines virtual world objects into real world view. The method used is ADDIE model of R&D (Research and Development) for the five stages of a waterfall model. Application used is unity 3D and Blender as supporting software. Testing of product uses validation, practicality, and effectiveness tests. The product produced is an application with an extension (.apk). The results of validation, practicality and effectiveness of the products were 0.68 with valid criteria, 78.6 with practical criteria and 0.72 with high effectiveness criteria, respectively.
Sentiment Analysis using Recurrent Neural Network
Authors: Kurniasari Lilis , Setyanto Arif
Published: March 2020

This study aims to measure the accuracy of the sentiment analysis classification model using deep learning and neural networks. This study used the algorithm Recurrent Neural Network (RNN) and Word2vec. No previous research has used this model to analyze sentiments written using Indonesian language so that the level of accuracy is unknown. The research began by making a classification model of sentiment analysis. Then, the model was tested through experiments. In this study, They used two classifications (positive and negative). Experiments are carried out using training data sets and the test used data sets sourced from Traveloka theybsite. The result shows that the model presents outstanding results and reaches about 91.9%.
Investigating Students’ Need in Developing Integrated Model of Intensive and Extensive Reading Instruction at English Education Study Program of Islamic State Institute of Bukittinggi
Authors: Melani Melyan , Syafitri Loli
Published: March 2020

Investigating the need of the students and lecturers is a part of series of reseach and development which attempted to integrate Intensive and Extensive Reading in teaching Reading at English Education Study Program. This study was aimed at identifying the need of the students in the process of teaching Reading. It focussed on problems, priorities, ability, attitude and solution as the categories of information used in need analysis. The result of need analysis were later used for task analysis, concept analysis and specifying intsructional objectives for a reading lesson. A descriptive quantitative method was employed to meet the reacearch objective. A questionare was used to collect data on students need. It involved 67 students. The research finding indicated that students have problems related to limited amount of vocabulary, limited time allocated for reading, text difficulty level, low language ability and inadequate reading strategies. Students priorities in Reading class were reading strategies on how to understand word, sentences and paragraph. Students ability and attitude towards reading indicated that they had low reading abilities, they liked reading, they believed that “reading a lot” improved their reading ability and finally, most of the students didn’t do reading activities independently.
Design of Learning Modules Writing Narrative Text Based on Project Based Learning (PjBL) by Using Mobile Devices
Authors: Ramadhan Syahrul , Indriyani Vivi , Asri Yasnur , Sukma Elfia
Published: March 2020

Every aspect of education continues to experience innovation after the internet, digital tools and technological gadgets have been easily accessed everywhere marked by online reading, electronic books and audio books along with printed material. Based on that, this study aims to develop learning modules for learning to write narrative texts based on project based learning using mobile devices. This type of research is R&D (research & development). The development model used is a 4-D model (define, design, develop, and assess). The research instruments used were questionnaires, observation sheets, interview guides, and tests. In this paper, the results of the study are more focused on discussing the design of the developed learning modules. By understanding the design, readers can develop learning modules based on project based learning for types of narrative texts at various levels of education. The module design that was designed was validated by experts and concluded that the module was categorized as very valid and could be tested.
Build Character of Hard Work through Problem Solving Strategies (Intelligent Guessing and Testing in Mathematics)
Authors: Firmanti Pipit , Rahmat Tasnim , Yuberta Fauzi , Fitri Haida
Published: March 2020

In the process of learning mathematics, problem-solving activities is an essential part. Several strategies can be used in this activity including intelligent guessing and testing. This strategy has characteristics that are very potential to develop the character of student as hard work. It is a way for success. In solving the problem, a participant can complete the task in the allotted time, using all abilities or power to achieve goals and trying to find various alternative solutions when faced with obstacles. These activities show the indicator of hard work. The more often students practice using this strategy, the more trained students in developing of hard-work character themselves.
Brain Based Teaching In The View Of Tarbiyah IAIN Bukittinggi Students
Authors: Sesmiarni Zulfani , Iswantir M , Annas Firdaus
Published: March 2020

Students in tertiary institutions should also be served with brain-based teaching-learning because all humans have a unique way of learning according to the way the brain works. This research begins with the author’s assumption that students of Tarbiyah and Teacher Training Faculty of IAIN Bukittinggi are not yet familiar with brain-based teaching. The purpose of this study was to determine the views of Tarbiyah and Teacher Training Faculty students about brain-based teaching. The method used in this study was to use a questionnaire given to 100 respondents, namely students of Tarbiyah and Teacher Training IAIN Bukittinggi taken randomly, the results of the questionnaire obtained were then counted for the percentage. The results of this study found that students’ views of Lecturer’s expectations were 21%, views about how the brain works 17%, views about learning styles 19%, views about multiple intelligences 18% and views on pleasant learning were 25%. From these data, it can be concluded that the students’ views on brain-based teaching have not been maximized.
Enhancement Students’ Problem-Solving Ability through Inquiry Learning Model Integrated with Advance Organizers on the Concept of Work and Energy
Authors: Gunawan G , Harjono A , Nisyah M , Kusdiastuti M , Herayanti L , Fathoroni F
Published: March 2020

Problem solving is an ability that involves the process of thinking and working to find problem solutions. In the process of problem solving, students must be able to focus on problems, describe problems in concepts, plan the solutions, implement the plans and evaluate the solutions. This article discusses the effectiveness of the inquiry model integrated with advance organizers in enhancing students’ problem solving ability in concepts of work and energy. This research was conducted with one group pretest-posttest design at two different senior high schools. The research instrument used was five questions of the essay test. The enhancement of problem solving ability was analyzed by N-gain score. The results showed that the problem solving ability of two groups increased in medium category for each submaterial, while based on the problem solving stage, stage of focus the problem, plan the solutions and implement the plan increased with the high category in one group, while the other stages were in the medium category. The results of this study have proven that the inquiry model integrated with advance organizers is effective in increasing students’ ability to solve problems in the concept of work and energy.
Retroactive Thinking Interference of Grade VI Students: A Study on the Topics of PISA Literacy Lessons
Authors: Maulyda M A , Rahmatih A N , Gunawan G , Hidayati V R , Erfan M
Published: March 2020

Retroactive thinking interference is a failure in retrieving old information because it is covered by new information, often called disremembering. Disremembering happens when a lesson transferred to long-term memory fails to be recalled because it interferes with other similar concepts. This phenomenon causes learning problems for students. This study is qualitative research that focuses on describing retroactive thinking interference in grade VI of elementary school students. The subjects of the study were 37 students in SDN 26 Ampenan. Students’ work and transcripts of short interviews conducted after completing the pretest and posttest were collected. The results show that most subjects cannot answer the questions correctly, some did not even answer the questions. This is related to students disremembering the lessons due to retroactive thinking interference. This thinking interference occurs because of the difficulty in recalling information that has long been buried by new information. The interference of retroactive thinking can also be characterized by the exchange of information between the two concepts already taught.
The Role of Teaching Hospital Characteristic in Achievement of Doctor Competency in Universitas Muhammadiyah Yogyakarta
Authors: Estri S A T S , Majdawati A , Kusumawati W
Published: March 2020

Clinical stage medical education requires a teaching hospital with a specific learning environment in order to be able to meet the competency achievement of students. This study aims to determine the role of hospitals in achieving competency. The cross-sectional study was carried out with the subjects of the medical clinical stage of Universitas Muhammadiyah Yogyakarta students. The characteristics of hospital were measured by DREEM questionnaire, while the achievement of competencies was based on the scores of OSCE national board. The Spearman correlation analysis was conducted to determine the correlation between the characteristics of the hospital and achievement of competency. The results showed the mean of DREEM of 137.41 and the OSCE of 79.76. The correlation analysis showed no correlation between the characteristics of hospitals and achievement of competence (p=0.96). The score of the characteristic components of the hospital on the learning process was of 2.79 (a more positive perception), was of 2.72 (a more positive perception), on learning environment was of 2.67 (a more positive perception), on social environment was of 2.65 (very good socially) and on academic ability of the students was of 2.92 (feeling more on the positive side). The results of the study can be used by the faculty leader as a consideration to choose a hospital that is used as a place of education.
Comparison of Multi Layered Percepton and Radial Basis Function Classification Performance of Lung Cancer Data
Authors: Jusman Yessi , Indra Zul , Salambue Roni , Kanafiah Siti Nurul Aqmariah Mohd , Nurkholid Muhammad Ahdan Fawwaz
Published: March 2020

Lung cancer was the most commonly diagnosed cancer as well as the leading cause of cancer death in males in 2008 globally. The way used to detect lung cancer are through examination chest X-ray, Computed Tomography (CT) scan, and Magnetic Resonance Imaging results. The accurate and efisien analysis of the imaging results are important to ensure the minimal time processing. A computed assisted diagnosis system is the crusial research which can conduct the analysis efficiently and efectively. This paper aimed to compare the classification performances of Multi Layered Perceptron (MLP) and Radial Basis Function (RBF) techniques. The public lung cancer datasets was used as training and testing data in the classfication techniques. Ten fold cross validation was used for dividing data before classifying techniques. The accuracy performances are compared to check a better technique for classification step.
Model of Geometry Realistic Learning Development with Interactive Multimedia Assistance in Elementary School
Authors: Alim Jesi Alexander , Fauzan Ahmad , Arwana I Made , Musdi Edwin
Published: March 2020

Initial research results indicate there are problems in learning mathematics, especially in geometry material in elementary schools. Students still have not had the opportunity to build their own knowledge. The purpose of this study is to produce a realistic learning model of interactive multimedia-assisted geometry to improve the reasoning ability of fourth grade elementary school students who meet valid, practical and effective criteria. This research is a design research that combines the Plomp and Gravemeijer & Cobb development model which consists of three phases: preliminary research (experimental preparation), prototyping phase (conducting experiments, retrospective analysis) and assessment phase. The subjects of the study were students of grade four SD thirty seven Pekanbaru. The results of the study indicate that the learning design developed has fulfilled valid, practical and effective. Valid in terms of content and construction. Practical in terms of implementation, convenience and time required. Effective in terms of potential impact on reasoning ability.
The Level of Mathematical Logic Intelligence towards the Solving of Mathematical Problem Solving
Authors: Rahmat Tasnim
Published: March 2020

The purpose of this study is to find the relationship between the levels of intelligence of mathematical logic with the ability to solve problems in terms of the various strategies used at the stage of planning problem solving. This problem is useful for students who solve non-routine problems. The method in this research uses a case study. The results of this study indicate that the average mathematical intelligence of Grade VII students of MTsN 6 Agam is at a complex level. The ability to solve problems in algebra and geometry material in the sample class is at the basic level with an average of 50.6, at the complex level with an average of 62.66 and at a coherent level with an average of 74.75. There is a significant influence between the level of intelligence of mathematical logic with the ability of students to solve problems in Algebra and Geometry material in mathematics in class VII.1 MTsN 6 Agam at 38.2% and for the remaining 61.8% influenced by other factors such as teachers’ competence, learning style, learning environment and lack of students in practicing in answering problem solving questions.
The preparation and characterization of a hydrophobic surface on an aluminum substrate
Authors: Nugroho A. W. , Setiyantoro A. E. , Sosiati H. , Himarosa R. A.
Published: March 2020

The development of a hydrophobic surface on an aluminum substrate as a self-cleaning surface has been carried out. In this research, a hydrophobic aluminum surface was fabricated using a combination of boiling and STA modification technique which is environmentally friendly. The specimens in circular shape with a diameter of 14 mm were cut from a 1 mm thick aluminum sheet and were then cleaned using ultrasonic cleaner. Afterward, the specimens were boiled for 10 minutes in water. Following this, the specimens were immersed in STA-ethanol-deionized water solution at a temperature of 60° C for 5, 10, 15 and 20 hours. Surface morphology, roughness, and hardness of the hydrophobic aluminum surface were examined. The surface morphology analysis presents the existence of rough microstructure on the coated aluminum surface. While the roughness value increase with the increase of immersion times, the surface hardness value does not appear to change significantly for immersion time up to 15 hours and slightly decrease for the longer immersion time. The water contact angle of 133° and rolling angle of 13° was achieved which indicates the ultra-hydrophobicity of the aluminum surface has been obtained.
Features Extraction to Differentiate of Spinal Curvature Types using Hue Moment Algorithm
Authors: Salleh Muhammad Ainzulhafiz Mat , Kanafiah Siti Nurul Aqmariah Mohd , Jusman Yessi , yusof Mohd Imran
Published: March 2020

Nowadays, diagnosing the spinal problems is very important to medical field. The objective of this research is to develop feature extraction technique to obtain the features, which automatically differentiate images of normal and abnormal (scoliosis) spinal curvatures. The process to extract features of spinal image start with image acquisition, image processing (i.e. enhancement, filtering, and segmentation). For image processing method, the most important part in this phase is the segmentation using manual threshold method. After the segmentation, hue moment for size and parameter are used to extract features that should be considered based on probabilistic to classify the spine images. The final experimental result shows that the developed features extraction technique can differentiate between normal and scoliosis spine images.
Application of ELECTRE Algorithm in Skincare Product Selection
Authors: Nasution Nurliana , Febriadi Bayu , Mahalisa Galih , Hijriana Nadiya , Rasyidan Muhammad , Sinaga Dewinta Marthadinata , Dewi Sinta Maulina , Windarto Agus Perdana , Aswan Novita , Raharjo Mokhamad Ramdhani
Published: March 2020

Skincare is currently growing very fast. The community, especially women, both teenagers and parents, now believes more in Skincare services and products that change consumers’ faces to be cleaner, and shine for their appearance. However, until now there are still obstacles that are often faced by consumers in choosing Skincare that is in accordance with the needs of their skin type. This study aims to recommend the selection of Skincare products based on consumers using the ELECTRE method. The data collection method was carried out by means of interviews and questionnaires on 250 samples of consumers who use Skincare products in the city of Pematangsiantar. Based on these results the criteria for evaluating prices (X1), ingredient content (X2), side effects (X3), availability of goods (X4), and packaging (X5). The alternatives used are 4 namely: A1 = Gamier, A2 = Nature Republic, A3 = Pond’s, A4 = Wardah. The results of the research using the ELECTRE method show that Skincare Garnier (A1) products are recommended to be the best Skincare based on consumers. It is expected that research results can provide understanding to consumers in choosing Skincare products.
Optimization of Data Encryption Modeling Using RSA Cryptography Algorithm As Security E-Mail Data
Authors: Sari Indah Clara , Zarlis Muhammad , Tulus T
Published: March 2020

Along with advances in information technology, data security is a very important thing. RSA is an asymmetric cryptographic algorithm that uses a pair of keys, namely public key and private key. This research applies the RSA algorithm to solve the optimization problem in the encryption process by increasing the presentation of the encryption process more quickly and effectively with the aim of safely sent emails.
Construction of hierarchical square biscuit-shape BiOBr photocatalyst with enhanced visible-light-response photocatalytic activities
Authors: Hou Linrui , Niu Yawei , Ge Fengyue , Yuan Changzhou
Published: March 2020

Herein, we first explore an efficient solvothermal method to fabricate hierarchical square biscuit-like BiOBr architecture (SBBA), and further utilize it as a visible-light-responsive photocatalyst. The photocatalytic performance of the resultant SBBA is comprehensively evaluated by photocatalytic degradation of methyl orange solution as a model wastewater under the visible light irradiation. The SBBA photocatalyst with a band gap of ∼2.56 eV exhibits remarkable photocatalytic activities in terms of degradation efficiency and reproducibility. More importantly, a plausible electron transfer and involved degradation mechanism are put forward. The excellent photocatalytic activities consolidate it as a promising photocatalyst in practical wastewater treatment.
Computing GIT-fans with symmetry and the Mori chamber decomposition of \overline{𝑀}_{0,6}
Authors: Böhm Janko , Keicher Simon , Ren Yue
Published: March 2020

We propose an algorithm to compute the GIT-fan for torus actions on affine varieties with symmetries. The algorithm combines computational techniques from commutative algebra, convex geometry, and group theory. We have implemented our algorithm in the Singular library gitfan.lib. Using our implementation, we compute the Mori chamber decomposition of 

Mov
⁡
(

M
¯

0
,
6

)

\operatorname {Mov}(\overline {M}_{0,6})

.
The action of a Coxeter element on an affine root system
Authors: Reading Nathan , Stella Salvatore
Published: March 2020

The characterization of orbits of roots under the action of a Coxeter element is a fundamental tool in the study of finite root systems and their reflection groups. This paper develops the analogous tool in the affine setting, adding detail and uniformity to a result of Dlab and Ringel.