bluuebunny/crossref_metadata_2025 huggingface dataset:
Asymmetric Mean Metallicity Distribution of the Milky Way’s Disk
Authors: An Deokkeun
Published: June 2019

I present the mean metallicity distribution of stars in the Milky Way based on photometry from the Sloan Digital Sky Survey. I utilize an empirically calibrated set of stellar isochrones developed in previous work to estimate the metallicities of individual stars to a precision of 0.2 dex for reasonably bright stars across the survey area. I also obtain more precise metallicity estimates using priors from the Gaia parallaxes for relatively nearby stars. Close to the Galactic mid-plane (

kpc), a mean metallicity map reveals deviations from the mirror symmetry between the northern and southern hemispheres, displaying wave-like oscillations. The observed metallicity asymmetry structure is almost parallel to the Galactic mid-plane, and coincides with the previously known asymmetry in the stellar number density distribution. This result reinforces the previous notion of the plane-parallel vertical waves propagating through the disk, in which a local metallicity perturbation from the mean vertical metallicity gradient is induced by the phase-space wrapping of stars in the Z–V

Z
plane. The maximum amplitude of the metallicity asymmetry (Δ[Fe/H] ∼ 0.05) implies that these stars have been pulled away from the Galactic mid-plane by an order of

pc as a massive halo substructure such as the Sagittarius dwarf galaxy plunged through the Milky Way. This work provides evidence that the Gaia phase-space spiral may continue out to

.
Streaming Instability for Particle-size Distributions
Authors: Krapp Leonardo , Benítez-Llambay Pablo , Gressel Oliver , Pessah Martin E.
Published: June 2019

The streaming instability is thought to play a central role in the early stages of planet formation by enabling the efficient bypass of a number of barriers hindering the formation of planetesimals. We present the first study exploring the efficiency of the linear streaming instability when a particle-size distribution is considered. We find that, for a given dust-to-gas mass ratio, the multi-species streaming instability grows on timescales much longer than those expected when only one dust species is involved. In particular, distributions that contain close-to-order-unity dust-to-gas mass ratios lead to unstable modes that can grow on timescales comparable to, or larger than, those of secular instabilities. We anticipate that processes leading to particle segregation and/or concentration can create favorable conditions for the instability to grow fast. Our findings may have important implications for a large number of processes in protoplanetary disks that rely on the streaming instability as usually envisioned for a unique dust species. Our results suggest that the growth rates of other resonant-drag instabilities may also decrease considerably when multiple species are considered.
NICER Discovers Spectral Lines during Photospheric Radius Expansion Bursts from 4U 1820−30: Evidence for Burst-driven Winds
Authors: Strohmayer T. E. , Altamirano D. , Arzoumanian Z. , Bult P. M. , Chakrabarty D. , Chenevez J. , Fabian A. C. , Gendreau K. C. , Guillot S. , in ’t Zand J. J. M. , Jaisawal G. K. , Keek L. , Kosec P. , Ludlam R. M. , Mahmoodifar S. , Malacaria Christian , Miller J. M.
Published: June 2019

We report the discovery with the Neutron Star Interior Composition Explorer (NICER) of narrow emission and absorption lines during photospheric radius expansion (PRE) X-ray bursts from the ultracompact binary 4U 1820−30. NICER observed 4U 1820−30 in 2017 August during a low-flux, hard spectral state, accumulating about 60 ks of exposure. Five thermonuclear X-ray bursts were detected, of which four showed clear signs of PRE. We extracted spectra during the PRE phases and fit each to a model that includes a Comptonized component to describe the accretion-driven emission, and a blackbody for the burst thermal radiation. The temperature and spherical emitting radius of the fitted blackbody are used to assess the strength of PRE in each burst. The two strongest PRE bursts (burst pair 1) had blackbody temperatures of ≈0.6 keV and emitting radii of ≈100 km (at a distance of 8.4 kpc). The other two bursts (burst pair 2) had higher temperatures (≈0.67 keV) and smaller radii (≈75 km). All of the PRE bursts show evidence of narrow line emission near 1 keV. By coadding the PRE phase spectra of burst pairs 1 and, separately, 2, we find, in both coadded spectra, significant, narrow, spectral features near 1.0 (emission), 1.7, and 3.0 keV (both in absorption). Remarkably, all the fitted line centroids in the coadded spectrum of burst pair 1 appear systematically blueshifted by a factor of 1.046 ± 0.006 compared to the centroids of pair 2, strongly indicative of a gravitational shift, a wind-induced blueshift, or more likely some combination of both effects. The observed shifts are consistent with this scenario in that the stronger PRE bursts in pair 1 reach larger photospheric radii, and thus have weaker gravitational redshifts, and they generate faster outflows, yielding higher blueshifts. We discuss possible elemental identifications for the observed features in the context of recent burst-driven wind models.
Analysis of Nitrosamines in Processed Meat Products in Medan City by Liquid Chromatography-Mass Spectrometry
Authors: Cintya Henni , Silalahi Jansen , Putra Effendy De Lux , Siburian Rikson
Published: June 2019

BACKGROUND: Nitrosamine is a carcinogen and the maximum level in processed meat products set by WHO.
AIM: The purpose of this study was to determine nitrosamine levels in meat products in Medan City and compared nitrosamine levels with standards set by WHO.
METHODS: The samples analysed were obtained from Berastagi Supermarket, sausages, burgers, corned beef and smoked beef. Nitrosamine levels were determined by reverse phase liquid chromatography-mass spectrometry.
RESULTS: The results showed that only 5 out of 20 samples of N-nitroso-thiazolidine-4-carboxylic acid (NTCA) nitrosamine ranged from 501.290 to 4227.492 µg/kg. The highest level of NTCA was found in smoked beef (Chiefs), which is 4227.492 µg/kg. N-nitroso-2-methyl-thiazolidine-4-carboxylic acid (NMTCA) was contained in all the samples analysed which ranged from 20.50 to 989.175 µg/kg. The highest NMTCA nitrosamine content was found in smoked beef (Chiefs), which is 989.175 µg/kg.
CONCLUSION: From this study reveal that nitrosamines in meat products exceed the maximum standards set by WHO (10 µg/kg).
The utility of Sentinel-2 Vegetation Indices (VIs) and Sentinel-1 Synthetic Aperture Radar (SAR) for invasive alien species detection and mapping
Authors: Rajah Perushan , Odindi John , Mutanga Onisimo , Kiala Zolo
Published: June 2019

The threat of invasive alien plant species is progressively becoming a serious global concern. Alien plant invasions adversely affect both ecological services and socio-economic systems. Hence, accurate detection and mapping of invasive alien species is valuable in mitigating adverse ecological and socio-economic effects. Recent advances in active and passive remote sensing technology have created new and cost-effective opportunities for the application of remote sensing to invasive species mapping. In this study, new generation Sentinel-2 (S2) optical imagery was compared to S2 derived Vegetation Indices (VIs) and S2 VIs fused with Sentinel-1 (S1) Synthetic Aperture Radar (SAR) imagery for detecting and mapping the American Bramble (Rubuscuneifolius). Fusion of S2 VIs and S1SAR imagery was conducted at pixel level and multi-class Support Vector Machine (SVM) image classification was used to determine the dominant land use land cover classes. Results indicated that S2 derived VIs were the most accurate (80%) in detecting and mapping Bramble, while fused S2 VIs and S1SAR were the least accurate (54%). Findings from this study suggest that the application of S2 VIs is more suitable for Bramble detection and mapping than the fused S2 VIs and S1SAR. The superior performance of S2 VIs highlights the value of the new generation S2 VIs for invasive alien species detection and mapping. Furthermore, this study recommends the use of freely available new generation satellite imagery for cost effective and timeous mapping of Bramble from surrounding native vegetation and other land use land cover types.
Trayectorias biográficas de los italianos en el Ecuador de fines del siglo XIX y primera mitad del siglo XX
Authors: Pagnotta Chiara
Published: June 2019

En este artículo pretendo reconstruir las trayectorias biográficas y las redes migratorias del grupo italiano presente en Ecuador a finales del siglo XIX y primera mitad del siglo XX. Me interesa aquí poner de relieve los puntos en común entre los diferentes protagonistas de la migración, para esbozar una biografía colectiva —cuantitativamente significativa— de los inmigrantes italianos en ese país, basada en las fichas consulares recopiladas por las representaciones diplomáticas en Quito y en Guayaquil entre 1897 y 1941.
Proposed Model of Multiplayer Matching Game Plugins Using Websocket in Moodle
Authors: Darma Kotama I Nyoman , Oka Saputra Komang , Linawati Linawati
Published: June 2019

Technology revolution in computer and information made Learning Man-agement System has widely been used to assist learning process. On the other side the advancement of technology in multimedia made many re-searchers have positive result in game based learning as factor that increase motivation and interest to deliver educational information. We try to pro-pose a concept to implement a multiplayer matching quiz in Moodle LMS to enrich game based learning using Moodle future research about game-based learning implementation in Moodle. The proposed model implements websocket as its multiplayer backend and game questions using Moodle Quiz plugin as a question bank.
Students’ Metacognitive Weaknesses in Academic Writing: A Preliminary Research
Authors: Ramadhanti Dina , Ghazali A Syukur , Hasanah Muakibatul , Harsiati Titik
Published: June 2019

This article aims to explain the weaknesses of metacognition that affect writing skills. Weaknesses of writing like content development, the organization of writing, compatibility of content with themes and audience awareness are assumed from the weaknesses of student metacognition. By using a qualitative approach, data is collected through questionnaires and interviews. Using the questionnaire found the level of student metacognitive awareness. A total of 22 male and female students were randomly selected. Responses given through self-report questionnaires showed that as many as 15 students had high metacognitive awareness and as many as 7 students had low metacognitive awareness. Furthermore, through interviews found metacognitive skills in academic writing. The results of the data analysis show that there are three weaknesses of student metacognitive, namely: students are too dependent on feedback from lecturers and highly dependent on lecturers and colleagues when writing, students cannot assess their own understanding of the information they receive for writing assignments, students are not aware benefit from the strategies used during writing. Students need to be trained to plan, monitor and evaluate writing activities so that they are skilled in arranging words, concepts, and terminology used in writing. In addition, through the writing they produce, it can be seen how the process of produces the meaning and thinking skills of students in writing.
A Novel Expert Evaluation Methodology Based on Fuzzy Logic
Authors: Salmi Khalid , Magrez Hamid , Ziyyat Abdelhak
Published: June 2019

In order to maintain the training quality and ensure efficient learning, the introduction of a scalable and well-adapted evaluation system is essential. An adequate evaluation system will positively involve students in the evaluation of their own learning, as well as providing teachers with indicators on the student's strengths, the specific encountered difficulties and the false or misunderstood studied parts. In this context, we present, in this article, a novel intelligent evaluation methodology based on fuzzy logic and knowledge based expert systems. The principle of this methodology is to reify abstract concepts of a human expertise in a numerical inference engine applied to evaluation. It reproduces, therefore, the cognitive mechanisms of evaluation experts. An im-plementation example is presented to compare this method with the classical one and draw conclusions about its efficiency. Furthermore, thanks to its flexibility, different kinds of extensions are possible by updating the basic rules and adjusting to possible new architectures and new types of evaluation.
Innovation Technologies in Student’s Independent Activity and Creativity Development: The Case of Medical Education
Authors: Maltabarova Nurila , Kokoshko Alexey , Abduldayeva Aigul , Shanazarov Nasrulla , Smailova Galiya
Published: June 2019

Adaptive learning technologies, applied with supportive symbols and signals allow developing the subject and communicative competencies, as well as shaping the creative abilities of students. This article provides the assessment criteria for preliminary, formative, midpoint and summative assessments. This article substantiates the hypothesis on improving the Emergency Medical Service student’s independent performance at the stage of supportive notes introduction. Methodology is original as it contains the following method: students are the one to write notes as an effective means of independent activity organization. Besides, this method can be useful as an alternative recording technique. Accordingly, innovation-driven education (in our case, independent learning and skills developing for quality outcomes) is one of the main components of the teaching and learning process. The statistics have revealed that students gain better subject knowledge through this learning technology.
A Semantic Web Solution for Enhancing The Interoperability of E-learning Systems by Using Next Generation of SCORM Specifications
Authors: Bakhouyi Abdellah , Dehbi Rachid , Banane Mouad , Talea Mohamed
Published: June 2019

E-learning is a very dynamic field, constantly growing, which refers to an educa-tional content or learning experiences provided or made by means of digital tech-nologies. The development of this area has a direct impact on the quality of edu-cation and cost reduction.

E-learning is now dominated by learning management systems such as Moo-dle, to improve the interoperability of these systems; the use of data / resources is a major requirement, this need to push the e-Learning community to seek new approaches to improve this interoperability of systems. On the other hand, se-mantic Web technologies offers standards like RDF allows to describe Web re-sources with their metadata. We propose in this work an approach based on Se-mantic Web technology to improve the interoperability of e-Learning systems like Moodle.
Flipped Classroom Method for the Teacher Training for Secondary Education: A Case Study in the University of Granada, Spain
Authors: Hinojo-Lucena Francisco-Javier , Aznar-Díaz Inmaculada , Cáceres-Reche María-Pilar , Romero-Rodríguez José-María
Published: June 2019

Flipped Classroom methodology has strongly introduced in the classrooms of different educational levels, but above all in the University. This methodolo-gy could be defined as the reversal of roles in the classroom, where the stu-dent acquires theoretical knowledge outside of the classroom and becomes a space for resolving doubts and cooperative work. Thus, this paper analyzes the experience carried out at the University of Granada with students of the Master's Degree in Secondary School Training where Flipped Classroom methodology has been applied. The research methodology used is quantita-tive, so that an ad hoc questionnaire on a Likert scale was used to obtain the data. Among the obtained results, it is observed that the students perceive an improvement in their academic performance and the improvement of the dif-ferent personal and social skills. Finally, it can be concluded that this kind of experiences where the Flipped Classroom methodology is applied favors the development of skills depending of subject taught and the field of knowledge.
Training Robot Manipulation Skills through Practice with Digital Twin of Baxter
Authors: Verner Igor M. , Cuperman Dan , Gamer Sergei , Polishuk Alex
Published: June 2019

This study explores an opportunity to engage first-year engineering students in practice with a modern industrial robot Baxter and provides training in spatial skills. We developed a laboratory exercise in which the students operate the robot to perform spatial manipulations of objects. We implemented the exercise on a digital twin of Baxter in the Gazebo virtual environment. The digital twin was calibrated to mimic the physical properties of the Baxter and correctly simulate its spatial manipulations with oriented cubes. The exercise was delivered to a class of 25 students as part of the robotics workshop in the Introduction to Industrial Engineering course. We administered a post-workshop questionnaire with focus on the analysis of the learning outcomes and students' spatial difficulties. The students noted that the workshop and particularly the exercise effectively exposed them to industrial robotics and raised their spatial awareness in robot operation.
Singapour : l’énigme territoriale
Authors: Koninck Rodolphe De
Published: June 2019

Pour lʼauteur, une première rencontre avec Singapour en 1967 a été marquante. En plein démarrage à titre de république nouvellement indépendante, la Cité-État se transformait en vaste chantier dʼinnovations tant économiques et infrastructurelles que sociales et politiques. Ayant pu observer de près pendant un demi-siècle toutes les étapes et les résultats de ce bouleversement quasi permanent, lʼauteur suggère une interprétation de sa logique dʼun point de vue territorial. La manipulation tous azimuts et incessante de tous les repères spatiaux entraînerait une forme dʼaliénation territoriale et contribuerait à lʼadhésion de la population au projet politique des dirigeants de lʼÉtat : transformer le territoire pour transformer la société. De nature diachronique, une dizaine de planches cartographiques sert à illustrer le caractère systématique de cette démarche et de sa valeur explicative.
C’est la vie ! Quatorze années de détention politique
Authors: Tedjabayu  , Chambert-Loir Traduit et introduit par Henri
Published: June 2019

Cet article présente deux extraits des mémoires de Tedjabayu, qui a passé quatorze ans en prison, à Java, et au bagne de Buru, entre 1965 et 1979. Tedjabayu est l’aîné des huit enfants de Sudjojono et Mia Bustam. Il avait 21 ans lorsqu’il a été arrêté ; il était étudiant en géographie à l’Université Gadjah Mada et membre du CGMI (Fédération des mouvements étudiants d’Indonésie, d’obédience communiste). Les mémoires, inédits jusqu’à aujourd’hui, ont été écrits en 2014-2017 ; ils sont accompagnés d’un journal, tenu à Buru en 1978‒1979. Ce texte constitue un document important sur la vie à Buru, à côté de la douzaine de souvenirs déjà publiés sur ce bagne, où le régime de Soeharto envoya 12.000 hommes entre 1969 et 1979. En dépit de tous les mauvais traitements qu’il a subis, Tedjabayu relate ses années de détention avec la volonté de toujours privilégier la beauté de la nature, le bonheur de l’amitié et l’émerveillement de vivre.
Solvothermal Synthesis and Luminescence Properties of Gd2O2S:RE3+ (RE3+=Eu3+/Tb3+) Hollow Sphere
Authors: Xu Guang Xi , Sang Xiao Tong , Lian Jing Bao , Wu Nian Chu , Zhang Xue
Published: June 2019

Eu3+ and Tb3+ ions singly activated Gd2O2S hollow spheres have been successfully synthesized via solvothermal method by using Gd (NO3)3, Eu (NO3)3, Tb (NO3)3 and thiourea as raw materials. Detailed characterization of the as-prepared samples were obtained by X-ray diffractometry (XRD), field emission scanning electron microscopy (FE-SEM), transmission electronic microscope (TEM) and photoluminescence (PL) spectroscopy. The results demonstrate that at 220 oC for 24 h, the molar ratio of thiourea/Gd3+ has no significant impact on the phase composition of Gd2O2S products. With the reaction time increased from 6 h to 24 h, the morphology of Gd2O2S samples changed from ellipsoidal to near-spheroidal structure, but still remained hollow structure. PL results show that the strongest emission peaks for Gd2O2S:Eu3+ and Gd2O2S:Tb3+ samples were centered at 625 nm and 545 nm, corresponding to the 5D0→7F2 transition of Eu3+ ions and 5D4→7F5 transition of Tb3+ ions, respectively. The quenching concentrations for Eu3+ and Tb3+ ions were 12% and 6%, which can be attributed to the exchange interaction for Eu3+ and Tb3+ ions, respectively.
Co-Precipitation Synthesis and Photoluminescence Properties of K2SiF6:Mn4+ Red Phosphor for White Light Emitting Diodes
Authors: Wu Di , Ye Xin Yu , Wang Lin Sheng , Zeng Qing Hua
Published: June 2019

A novel red-emitting K2SiF6:Mn4+ phosphors with different Mn4+ doping mole fraction were synthesized by co-precipitation method. X-ray diffraction (XRD), scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FT-IR) and fluorescence spectrometer were used to characterize the properties of K2SiF6:Mn4+ phosphors. As-prepared K2SiF6:Mn4+ phosphors have cubic crystal structure. Under excitation at 450 nm, an intense red emission peak around 632 nm corresponding to the 2Eg-4A2 transition of Mn4+ was observed for 8.37 mol% K2SiF6:Mn4+ phosphors and was used as the optimum doping concentration. The excellent luminescent properties make the phosphor K2SiF6:Mn4+ a candidate for applications in InGaN-YAG:Ce3+ type LEDs for high color rendering. “A warm” white light LED with an efficiency of 147 lm/w and a color rendering index of 87.4 at a color temperature of 2864K has been obtained by fabricating YAG:Ce3+ with K2SiF6:Mn4+ on an InGaN chip.
Bifurcation Mechanism of Carbon Nanotubes and its Application Prospects
Authors: Zhang Xiu Xia , Zhang Li Long , Wei Shu Yi , Ding Zhen Wei
Published: June 2019

This article outlines the various processes for CNT growth. The surface morphology of carbon nanotubes on carbon nanotubes was characterized by scanning electron microscopy (TEM) and transmission electron microscopy (TEM). Bifurcated carbon nanotubes were founded. Mechanism analysis was studied of bifurcated carbon nanotubes from chemical crystallization bifurcation and nonlinear dynamic bifurcation. At present, 5nm or 7nm chip fabrication is limited by quantum effects, which makes Moore's Law invalid. Bifurcated carbon nanotubes may be the development direction of new transistors.
Study on Heat Treatment of a Low Nickel Superalloy Used for Automotive Valves
Authors: Mo Yan , Wang Dong Zhe , Liu Hai Ding , Du Lin , Liu Ying Long , Wan Hong , Huang Guo Ping
Published: June 2019

In this paper, a low nickel superalloy used for automotive valves was treated at different heat treatments. The metallographic structure and hardness with various heat treatment process were studied. Optimized process guarantees test superalloy can meet the technical requirements.
Preparation and Electrochemical Performance of Mn3O4/GR Composites Electrode Material in Supercapacitors
Authors: Zhou Yun Long , Hu Zhi Biao , Wu Li Mei , Wu Jiao Hao
Published: June 2019

Using hydrated manganese sulfate and general type graphene (GR) as raw materials, Mn3O4/GR composite has been successfully prepared by the liquid phase chemical co-precipitation method at room temperature. X-ray diffraction (XRD) was used to investigate the phase structure of Mn3O4powder and Mn3O4/GR composite; The electrochemical performances of the samples were elucidated by cyclic voltammetry and galvanostatic charge-discharge test in 0.5 mol/L Na2SO4electrolyte. The results show that the Mn3O4/GR composite possesses graphene phase and good reversibility; the composite also displays a specific capacitance of 318.8 F/g at a current density of 1 A/g.
Numerical Simulation Study on Influence of Geometric Parameters of Spin-Coating Pallet on Wafer Deformation
Authors: Wu Ting Xi , Lu Jian , Wang Qiang
Published: June 2019

Spin-coating process is one of the important parts in the fabrication of semiconductor integrated circuits (IC). Numerical simulations and experiments based on Fluent were carried out, including discussing geometric parameters of spin-coating pallet that affect wafer deformation. The numerical results indicated that under the same effect of vacuum negative pressure, when wafer-supporting stage diameter (D) was smaller than 30mm, the wafer deformation was mainly warpage deformation; and when D was greater than 45mm, spin-coating pallet deformation affected the wafer deformation increasingly and downwarping deformation was occurred at the wafer edge. At the same exit velocity, the deformation around the wafer center and the vacuum degree were both increased with the increase of vacuum suction diameter (d). When the area of the wafer-supporting stage was 1/2~3/5 of the wafer and d was about 3mm, the wafer deformation was the smallest.
Effects of Deposition Time on the Structure and Properties of AZO Thin Films Deposited on Quartz Glass by Magnetron Sputtering
Authors: Ba Jing Kang , Zhang Yun , Wang Xiao Jing
Published: June 2019

The AZO films deposited on quartz glass by magnetron sputtering with different deposition time various from 30min to 120min.All of the obtained samples had a (002) diffraction peak range from 34.31 to 34.52°, while the mean grain size increased from 30.1nm (30min) to 56.1nm (120min) respectively. The XPS survey indicated the photoelectron peaks of Zn ,O and C elements occured. The optimal transmittance of the films reduced obviously from about 92% to 78% near 550nm with deposition time increased from 30min to 120min. And the average transmittance of AZO films prepared at 30, 60 and 90min was about 85% in the visible light region.
Preparation and Electrochemical Properties of Si@C/Graphite Composite as Anode for Lithium-Ion Batteries
Authors: Wang Ying , Ruan Wei , Tang Ren Heng , Xiao Fang Ming , Sun Tai , Huang Ling
Published: June 2019

In this study, Si@C/Graphite composite anodes were synthesized through spray drying and pyrolysis using silica, artificial graphite, and two kinds of organics (phenolic resin or pitch). The Si@PR-C/Graphite exhibits enhanced electrochemical performance for lithium-ion batteries. The first charge-discharge specific capacity is 512.8mAh/g and 621.8mAh/g, respectively, the initial coulombic efficiency is 82.5% at 100mA/g, and its capacity retention rate reached as high as 85.4% with the capacity fade rate of less than 0.18% per cycle after 85 cycles. The Si@PI-C/Graphite also presents excellent discharge specific capacity of 702.8mAh/g with the capacity retention rate of 76.9% after 30 cycles. Mechanisms for high electrochemical performances of the Si@C/Graphite composite anode are discussed. It found that the enhanced electrochemical performance due to the formation of core/shell microstructure. These encouraging experimental results suggest that proper organic carbon source has great potential for improvement of electrochemical properties of pure silicon as anode. Key words:lithium-ion batteries; anode; Si@C/Graphite composite; electrochemical performance
SIMON, an Automated Machine Learning System, Reveals Immune Signatures of Influenza Vaccine Responses
Authors: Tomic Adriana , Tomic Ivan , Rosenberg-Hasson Yael , Dekker Cornelia L. , Maecker Holden T. , Davis Mark M.
Published: June 2019

Machine learning holds considerable promise for understanding complex biological processes such as vaccine responses. Capturing interindividual variability is essential to increase the statistical power necessary for building more accurate predictive models. However, available approaches have difficulty coping with incomplete datasets which is often the case when combining studies. Additionally, there are hundreds of algorithms available and no simple way to find the optimal one. In this study, we developed Sequential Iterative Modeling “OverNight” (SIMON), an automated machine learning system that compares results from 128 different algorithms and is particularly suitable for datasets containing many missing values. We applied SIMON to data from five clinical studies of seasonal influenza vaccination. The results reveal previously unrecognized CD4+ and CD8+ T cell subsets strongly associated with a robust Ab response to influenza Ags. These results demonstrate that SIMON can greatly speed up the choice of analysis modalities. Hence, it is a highly useful approach for data-driven hypothesis generation from disparate clinical datasets. Our strategy could be used to gain biological insight from ever-expanding heterogeneous datasets that are publicly available.
Low Temperature flip chip bonding technology applicable to flexible hybrid electronics in the IoT era
Authors: Komatsu Hiroshi
Published: June 2019

Since its early days of the industry, electronics apparatus has been in a rigid and flat surfaced case. ICs have been soldered on rigid substrate at high bonding temperature. However, in the IoT era, electronics components connect with the variety of applications which require different forms and shapes of outlook which lead substrate and board should be flexible and complex form. Conventional flip chip bonding technology, such as solder bump and copper pillar, need to raise bonding temperature around 260-degree C, eventually does not satisfy this flexile hybrid electronics (FHE) application requirement. We have originally developed flip chip bonding technology which consists of the bump formation by Conductive Paste (CP) printing followed by Non-Conductive Paste (NCP) dispensing and flip chip bonding at temperature as low as 120-degree C. Bumps with silver particle loaded epoxy resin on substrate were formed by screen printing. This enable us to make fine bump formation down to 60um minimum bump pitch and 30um bump diameter with tuning of screen-printing process. After the bump formation, NCP dispensing and flip chip bonding at 120-degree C which secure reasonable low electric resistance, 8×1E-4 ohm cm2, and strong adhesion of chip and substrate. The bonding temperature of this technology can be lowered down to 80-degree C without much difficulties, but just by fine tuning of Ag paste and its contents. This momentum will create a lot more of future applications and be one of the core technologies in the coming IoT era in FHE.
Antibacterial and antiviral potential of neuropeptides
Authors: Zannella Carla , Stelitano Debora , Folliero Veronica , Palomba Luciana , Bovier Tiziana Francesca , Astorri Roberta , Chianese Annalisa , Monda Marcellino , Galdiero Marilena , Franci Gianluigi
Published: June 2019

The emergence of multidrug resistant bacteria is a global health threat and the discovery of new antimicrobial agents is an absolute priority. In this context endogenous peptides are emerging as novel potential candidates. In this work, we assessed the antimicrobial effects of orexins and ghrelin neuropeptides against gram-negative (Escherichia coli, Salmonella typhimurium, Klebsiella pneumoniae) and gram-positive (Staphylococcus aureus) bacteria. Orexin-B and ghrelin showed a potent bactericidal effect at concentration equal to or greater than 25 μg/ml. No antimicrobial activity has been observed for orexin-A. Furthermore, we investigated the antiviral proprieties of the three peptides against herpes simplex virus 1 (HSV-1). We found that orexin-B, but not orexin-A is effective for HSV-1 infectivity inhibition.
Vesico-vaginal fistula: A clinical study
Authors: Reddy S.V. Krishna , Shaik Ahammad Basha
Published: June 2019

In a retrospective study, the records of 34 women with a mean ± SD age of the patients was 36.62 ± 9.02 years were assessed; 32.35% of the vesico-vaginal Fistula (VVF) occurred after abdominal hysterectomy, 11.77% after Caesarean section, 32.35% after difficult vaginal delivery and 23.53% after instrumental delivery. Six women (17.64%) had a previous failed repair. The duration (mean ± SD) of the VVF was 5.68 ± 1.59 months. Of the 34 VVF patients, 20 (58.82%) were Mid-Vaginal VVF, 8 (23.53%) were Circumferential VVF, 3 (8.82%) were Juxta cervical VVF and 3 (8.82%) were Juxta Urethral VVF. An abdominal approach was used in 21 cases (61.76%), vaginal repair was contemplated in 8 (23.53%) cases and Laparoscopic in 5 (14.71%). At a mean duration of follow-up was 33.06 ± 1.72 months and the VVF was cured in 28 (82.4%) patients. Only previous intervention and timing of surgery (P=0.004) and surgical approach (P=0.02) maintained significance in our study. An abdominal/ Laparoscopic approach seems to give superior results. Previous failed repair had a significant negative effect on success. A late repair (≥6 months) is associated with higher success rates.
Capturing Upper Limb Gross Motor Categories Using the Kinect® Sensor
Authors: Seo Na Jin , Crocher Vincent , Spaho Egli , Ewert Charles R. , Fathi Mojtaba F. , Hur Pilwon , Lum Sara A. , Humanitzki Elizabeth M. , Kelly Abigail L. , Ramakrishnan Viswanathan , Woodbury Michelle L.
Published: June 2019

Importance: Along with growth in telerehabilitation, a concurrent need has arisen for standardized methods of tele-evaluation.

Objective: To examine the feasibility of using the Kinect sensor in an objective, computerized clinical assessment of upper limb motor categories.

Design: We developed a computerized Mallet classification using the Kinect sensor. Accuracy of computer scoring was assessed on the basis of reference scores determined collaboratively by multiple evaluators from reviewing video recording of movements. In addition, using the reference score, we assessed the accuracy of the typical clinical procedure in which scores were determined immediately on the basis of visual observation. The accuracy of the computer scores was compared with that of the typical clinical procedure.

Setting: Research laboratory.

Participants: Seven patients with stroke and 10 healthy adult participants. Healthy participants intentionally achieved predetermined scores.

Outcomes and Measures: Accuracy of the computer scores in comparison with accuracy of the typical clinical procedure (immediate visual assessment).

Results: The computerized assessment placed participants’ upper limb movements in motor categories as accurately as did typical clinical procedures.

Conclusions and Relevance: Computerized clinical assessment using the Kinect sensor promises to facilitate tele-evaluation and complement telehealth applications.

What This Article Adds: Computerized clinical assessment can enable patients to conduct evaluations remotely in their homes without therapists present.
Extending the SBUV polar mesospheric cloud data record with the OMPS NP
Authors: DeLand Matthew T. , Thomas Gary E.
Published: June 2019

Abstract. We have utilized Solar Backscatter Ultraviolet (SBUV) instrument
measurements of atmospheric radiance to create a 40-year record of polar
mesospheric cloud (PMC) behavior. While this series of measurements is
nearing its end, we show in this paper that Ozone Mapping and Profiling
Suite (OMPS) Nadir Profiler (NP) instruments can be added to the merged SBUV
PMC data record. Regression analysis of this extended record shows smaller
trends in PMC ice water content (IWC) since approximately 1998, consistent
with previous work. Current trends are significant at the 95 % confidence
level in the Northern Hemisphere but not in the Southern Hemisphere. The
PMC IWC response to solar activity has decreased in the Northern Hemisphere
since 1998 but has apparently increased in the Southern Hemisphere.
The first Met Office Unified Model/JULES Regional Atmosphere and Land configuration, RAL1
Authors: Bush Mike , Allen Tom , Bain Caroline , Boutle Ian , Edwards John , Finnenkoetter Anke , Franklin Charmaine , Hanley Kirsty , Lean Humphrey , Lock Adrian , Manners James , Mittermaier Marion , Morcrette Cyril , North Rachel , Petch Jon , Short Chris , Vosper Simon , Walters David , Webster Stuart , Weeks Mark , Wilkinson Jonathan , Wood Nigel , Zerroukat Mohamed
Published: June 2019

Abstract. In this paper we define the first "Regional Atmosphere and Land" (RAL) science configuration for kilometre scale modelling using the UM and JULES. "RAL1" defines the science configuration of the dynamics and physics schemes of the atmosphere and land. This configuration will provide a model baseline for any future weather or climate model developments to be described against and it is the intention that from this point forward significant changes to the system will be documented in literature. This is reproducing the process used for global configurations of the UM which was first documented as a science configuration in 2011. While it is our goal to have a single defined configuration of the model that performs effectively in all regions, this has not yet been possible. Currently we define two sub-releases, one for mid-latitudes (RAL1-M) and one for tropical regions (RAL1-T). The differences between RAL1-M and RAL1-T are documented and where appropriate, we define how the model configuration relates to the corresponding configuration of the global forecasting model.
Can we trust remote sensing ET products over Africa?
Authors: Weerasinghe Imeshi , van Griensven Ann , Bastiaanssen Wim , Mul Marloes , Jia Li
Published: June 2019

Abstract. Evapotranspiration (ET) is one of the most important components in the water cycle. However, there are relatively few direct measurements of ET (using flux towers), whereas various disciplines ranging from hydrology to agricultural and climate sciences, require information on the spatial and temporal distribution of ET at regional and global scale. Due to limited data availability, attention has turned toward satellite based products to fill observational gaps. Various remote sensing data products have been developed, providing a large range of ET estimations. Across Africa only a limited number of flux towers are available which are insufficient for systematic evaluation of remotely sensed (RS) derived ET products. Thus we propose a methodology for evaluating RS derived ET data at the basin scale using a general water balance (WB) approach, where ET is equal to precipitation minus discharge for long-term annual averages. Firstly, RS ET products are compared with WB inferred ET for basins without long-term trends present. The RS products are then assessed according to spatial characteristics through analysing two land cover elements across Africa, irrigated areas and water bodies. A cluster analysis is also conducted to identify similarities between individual ET products. Finally, the RS products are evaluated against the Budyko equation. The results show that CMRSET, SSEBop and WaPOR rank highest in terms of estimation of long-term annual average mean ET across basins with low biases. Along with ETMonitor, the same three products rank highest in spatial distribution of ET patterns across Africa. GLEAM and MOD16 consistently rank the lowest in most criteria evaluation. Many of the products analysed in this study can be trusted depending on the study under question, keeping in mind some of these products have large biases in magnitude estimation. However our recommendation would be the three highest ranked products being CMRSET, SSEBop and WaPOR.
Estimation of tool life and cutting burr in high speed milling of the compacted graphite iron by DE based adaptive neuro-fuzzy inference system
Authors: Xu Longhua , Huang Chuanzhen , Su Rui , Zhu Hongtao , Liu Hanlian , Liu Yue , Li Chengwu , Wang Jun
Published: June 2019

Abstract. The studies of tool life and formation of cutting burrs in roughing
machining field are core issues in high speed milling of compacted graphite
iron (CGI). Changing any one of the cutting parameters like cutting speed or
feed rate can result in varied tool life and different height of the cutting
burrs. In this work in order to study the relationship between cutting
parameters and tool life and height of the cutting burrs, a new differential
evolution algorithm based on adaptive neuro fuzzy inference system
(DE-ANFIS) as a multi-input and multi-output (MIMO) prediction model is
introduced to estimate the tool life and height of the cutting burrs. In
this model, the inputs are cutting speed, feed rate and exit angle, and the
outputs are tool life and height of the cutting burrs. There are 12 fuzzy
rules in DE-ANFIS architecture. Gaussian membership function is adopted
during the training process of the DE-ANFIS. The proposed DE-ANFIS model has
been compared with PSO-ANFIS, Artificial Neural Network (ANN) and Support
Vector Machines (SVM) models. To construct the predictive models, 25 cutting
data were obtained through the experiments. Compared with PSO-ANFIS, ANN and
SVM models, the results indicate that DE-ANFIS can provide a better
prediction accuracy of tool life and height of the cutting burrs, and
achieve the required product and productivity. Finally, the analysis of
variance (ANOVA) shows that the cutting speed and feed rate have the most
effects on the tool life and height of cutting burrs, respectively.
The Effect of Optimal Use of Soil on Sustainability of Iranian Desert Buildings with Iranian Sustainable Architecture Approach
Authors: Hosseinzadeh Lida
Published: June 2019

In the past architecture of Iran, traditional architects had been able to provide comfort for residents through the smart use of architectural materials and strategies. Soil architecture is the most original type of Iranian architecture and the use of soil with characteristics such as high thermal capacity and thermal latency is at the cutting edge of this field in energy consumption and the pursuit of sustainable architecture in the world. This type of architecture not merely in the form of constructing a building in a single ground, but it has been united proportional to the scale and location of the project on the ground and an indivisible part of it. The research method adopted in this paper is based on text studies and the use of visual documents in the context of library research and descriptive-analytical method. In this research, a comparative study of the principles of sustainability with the vernacular architecture of Iran and the sustainable elements, including Shaw Shawādān, sunken gardens and etc. have been addressed in traditional Iranian architecture. The results of these studies show that desirable solutions derived from this vernacular architecture for achieving sustainable architecture can be presented for reducing fossil fuels and as a result reducing contamination that plays a significant role in these issues and the issue of sustainable development.
Onomástica Turca
Authors: Boray Sibel
Published: June 2019

Después de que entrase en vigor la “Ley del apellido” en 1934, todos los ciudadanos turcos empezaron a llevar nombre y un apellido. El nombre podía contener varias palabras pero el apellido tenía que ser una única palabra. Según esta ley el padre de cada familia tenía que elegir un apellido para su familia.

En este artículo se estudia las preferencias de la elección de los nombres entre los ciudadanos de la República de Turquía hoy en día.
'La familia de Pascual Duarte' y 'El collar y la pulsera': una lectura paralela entre la novela española y la egipcia
Authors: Maghrabi Madian
Published: June 2019

El objetivo de este trabajo comparado es realizar una aproximación a dos escritores muy destacados dentro de su literatura tanto la egipcia como la española. El motivo que nos ha llevado a este estudio son unos rasgos muy parecidos en las dos novelas, como los elementos trágicos del honor y el crimen violento en un espacio rural, reducido y común donde están ambientadas las dos obras literarias. También por el estilo que caracteriza Cela y Yahya al-Taher que nos ofrecen en sus novelas objeto de estudio.
Mamluk Popular Tales and Political Nostalogia
Authors: Shaikh Ahmad Khaled
Published: June 2019

Remarks on Jane Hathaway’s "nostalgia" theory (see infra, n. 6) concerning the impression left by the Mamluk sultans left on historiography.  Our remarks are based on manuscripts (especially the unpublished BNF arabe 3651) that did not become part of The Arabian Nights but help in understanding how that collection formed and took shape.
Normanitas and Memorial Traditions in the Apulian Architecture of Emperor Frederick II
Authors: Nancarrow Jane-Heloise
Published: June 2019

From 1225 to 1250, Frederick II, Holy Roman Emperor, built or renovated at least seventy defensive structures in the southern Italian province of Apulia. These buildings blended Roman, Islamic, or Byzantine elements with newer Gothic architecture; however, many of these architectural traits had already been adapted by the Norman lords of southern Italy in the preceding two centuries. Thus we must consider Frederick's originality in light of this less studied trend in the existing Romanesque canon. Frederick's replication of Norman architectural practices was based on the fact that they previously been used as a tool of empire, and it echoes his reuse of Roman remains. This article considers several aspects of Frederick's architectural program, including topographical layout and geographical positioning, his appropriation of Roman and Norman remains, and his adoption of classical and Norman artistic and engineering practices as nuanced processes of architectural spoliation and innovation.
The Theory and Practice of War and Government Practiced by King Pere III “the Ceremonious” of Aragon (1336–87)
Authors: Kagay Donald J.
Published: June 2019

This article focuses on the development of war theory during the thirteenth and fourteenth centuries and how it affected the practical ruling philosophy of one Iberian king—Pere III of Aragon (r. 1336–87). Though familiar with the many warfare manuals of his era, Pere was directly influenced by the religious work of his uncle, Prince Pere d'Aragó (1305–81) and the chivalric autobiography of his great-great grandfather, Jaume I (r. 1214–76). King Pere III used these works to better understand war and to try to improve his own performance as both king and commander, both of which avocations he thought and wrote about in great detail.
Important Leadership Skills for Career and Technical Education Administrators
Authors: Fleck Joey A. , Threeton Mark D. , Ewing John C.
Published: June 2019

Leaders influence the lives of many and impact the success of a wide variety of organizations. Career and Technical Education (CTE) Administrative Directors provide leadership in CTE school settings as they lead and manage personnel, facilities, curriculum, and student services. This
study sought to determine the essential leadership skills that are important for success as a CTE Administrative Director. The findings indicated that there are a variety of leadership skills that are important for success as a CTE Administrative Director. The top three include self-responsibility
and management, leadership and coaching, and written communication. As a result of these findings, CTE leadership programs could enhance leadership preparation and efforts to cultivate the development of leadership skills by CTE Administrative Directors.
Russian definitional generic sentences
Authors: Seres Daria , Espinal M.Teresa
Published: June 2019

In this article we analyse Russian definitional sentences, which are a type of generic sentence. We focus on the structure and meaning of canonical definitions, which express an identity/identification relation between two nominal concepts. In Russian such definitions are given in the form of a bi-nominative structure: NP1 – èto NP2 (‘NP1 is NP2’). We argue that definitional sentences are copular, and they are non-predicational, showing similarities to equative, identificational and specificational sentences. We also argue that (i) both NPs in definitional sentences are kind-referring, whereas èto is non-referential; (ii) a copula be maps a kind entity (the denotation of NP2) to itself (identity function); and (iii) the neuter element èto introduces a presentational function that maps the kind entity in postcopular position to a function that looks for another kind entity (the one corresponding to NP1) and composes a definitional generic sentence.