bluuebunny/crossref_metadata_2025 huggingface dataset:
A Two-Dimensional Mathematical Model of Heat Propagation Equations and Their Significance for Soil Temperature
Authors: Dhahbi Anis Ben , Boulaaras Salah , Radwan Taha , Mezouar Nadia , Zennir Khaled , Haiour Mohamed , Allahem Ali , Ghanem Sewelem
Published: April 2019

In the context of the development of the research project (Boulaaras et al.) which was supported by the Deanship of Scientific Research of Qassim University under the Project No. 1140 during the academic year 2016/1437, this research will introduce a two dimensional mathematical model based on the finite elements spatial method combined with a finite differences time scheme applied to the diffusion equations. This model will be applied in the hypothetical example where the obtained results will be compared with the real experimental data. Such a comparison will allow to predict the soil temperature for different depths and at different time periods according to certain conditions on the weather and take into account the stability conditions of the used numerical method. It’s worthy of note that some of the concreted mathematical problems will be addressed by the experimental scientific theories of functional analysis and then the numerical simulation of the theoretical study will be provided thanks to sophisticated methods with more convergence and stability. This mathematical model would be reduced by means of physical measurement and also in charge of the physical cost.
Shrinking Extragradient Method for Pseudomonotone Equilibrium Problems and Quasi-Nonexpansive Mappings
Authors: Khonchaliew Manatchanok , Farajzadeh Ali , Petrot Narin
Published: April 2019

This paper presents two shrinking extragradient algorithms that can both find the solution sets of equilibrium problems for pseudomonotone bifunctions and find the sets of fixed points of quasi-nonexpansive mappings in a real Hilbert space. Under some constraint qualifications of the scalar sequences, these two new algorithms show strong convergence. Some numerical experiments are presented to demonstrate the new algorithms. Finally, the two introduced algorithms are compared with a standard, well-known algorithm.
An m-Polar Fuzzy Hypergraph Model of Granular Computing
Authors: Luqman Anam , Akram Muhammad , Koam Ali N.A.
Published: April 2019

An m-polar fuzzy model plays a vital role in modeling of real-world problems that involve multi-attribute, multi-polar information and uncertainty. The m-polar fuzzy models give increasing precision and flexibility to the system as compared to the fuzzy and bipolar fuzzy models. An m-polar fuzzy set assigns the membership degree to an object belonging to [ 0 , 1 ] m describing the m distinct attributes of that element. Granular computing deals with representing and processing information in the form of information granules. These information granules are collections of elements combined together due to their similarity and functional/physical adjacency. In this paper, we illustrate the formation of granular structures using m-polar fuzzy hypergraphs and level hypergraphs. Further, we define m-polar fuzzy hierarchical quotient space structures. The mappings between the m-polar fuzzy hypergraphs depict the relationships among granules occurring at different levels. The consequences reveal that the representation of the partition of a universal set is more efficient through m-polar fuzzy hypergraphs as compared to crisp hypergraphs. We also present some examples and a real-world problem to signify the validity of our proposed model.
Application of the Fuzzy CODAS Method Based on Fuzzy Envelopes for Hesitant Fuzzy Linguistic Term Sets: A Case Study on a Personnel Selection Problem
Authors: Yalçın Neşe , Yapıcı Pehlivan Nimet
Published: April 2019

Fuzzy multi-criteria decision-making (MCDM) methods are useful and reliable for multi-criteria selection problems under uncertain and imprecise situations. In these methods, if decision-makers hesitate among several linguistic terms, hesitant fuzzy linguistic term sets (HFLTSs), represented by a set of successive linguistic terms instead of single linguistic terms, may be more appropriate to make evaluations. The notion of a fuzzy envelope for the HFLTSs is a beneficial tool that can be directly applied to fuzzy MCDM methods to elicit comparative linguistic expressions (CLEs). The aim of this study is to present a methodology that combines the fuzzy CODAS (COmbinative Distance-based Assessment) method with the fuzzy envelope of HFLTs based on CLEs to solve a personnel selection problem. In order to examine the feasibility of the presented methodology, a case study on blue-collar personnel selection in a manufacturing firm is conducted. A sensitivity analysis is performed to demonstrate the stability and validity of the ranking results. Furthermore, the ranking results of the presented methodology are compared with various fuzzy MCDM methods, including fuzzy EDAS, fuzzy TOPSIS, fuzzy WASPAS, fuzzy ARAS, and fuzzy COPRAS. The results show that the presented methodology is efficient and stable for solving personnel selection problems in a hesitant fuzzy environment.
One-Plane Glide-Symmetric Holey Structures for Stop-Band and Refraction Index Reconfiguration
Authors: Tamayo-Dominguez Adrian , Fernandez-Gonzalez Jose-Manuel , Quevedo-Teruel Oscar
Published: April 2019

This work presents a new configuration to create glide-symmetric structures in a single plane, which facilitates fabrication and avoids alignment problems in the assembly process compared to traditional glide-symmetric structures based on several planes. The proposed structures can be printed on the metal face of a dielectric substrate, which acts as a support. The article includes a parametric study based on dispersion diagrams on the appearance of stop-bands and phase-shifting by breaking the symmetry. In addition, a procedure to regenerate symmetry is proposed that may be useful for reconfigurable devices. Finally, the measured and simulated S parameters of 10 × 10 unit-cell structures are presented to illustrate the attenuation in these stop-bands and the refractive index of the propagation modes. The attenuation obtained is greater than 30 dB in the stop-band for the symmetry-broken prototype.
A New Method for Extraction and Analysis of Ricin Samples through MALDI-TOF-MS/MS
Authors: Sousa Roberto B. , Lima Keila S. C. , Santos Caleb G. M. , França Tanos C. C. , Nepovimova Eugenie , Kuca Kamil , Dornelas Marcos R. , Lima Antonio L. S.
Published: April 2019

We report for the first time the efficient use of accelerated solvent extraction (ASE) for extraction of ricin to analytical purposes, followed by the combined use of sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE), Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS), and MALDI-TOF MS/MS method. That has provided a fast and unambiguous method of ricin identification for in real cases of forensic investigation of suspected samples. Additionally, MALDI-TOF MS was applied to characterize the presence and the toxic activity of ricin in irradiated samples. Samples containing ricin were subjected to ASE, irradiated with different dosages of gamma radiation, and analyzed by MALDI-TOF MS/MS for verification of the intact protein signal. For identification purposes, samples were previously subjected to SDS-PAGE, for purification and separation of the chains, followed by digestion with trypsin, and analysis by MALDI-TOF MS/MS. The results were confirmed by verification of the amino acid sequences of some selected peptides by MALDI-TOF MS/MS. The samples residual toxic activity was evaluated through incubation with a DNA substrate, to simulate the attack by ricin, followed by MALDI-TOF MS/MS analyses.
Combining a Simple Method for DNA/RNA/Protein Co-Purification and Arabidopsis Protoplast Assay to Facilitate Viroid Research
Authors: Jiang Jian , Ma Junfei , Liu Bin , Wang Ying
Published: April 2019

Plant–viroid interactions represent a valuable model for delineating structure–function relationships of noncoding RNAs. For various functional studies, it is desirable to minimize sample variations by using DNA, RNA, and proteins co-purified from the same samples. Currently, most of the co-purification protocols rely on TRI Reagent (Trizol as a common representative) and require protein precipitation and dissolving steps, which render difficulties in experimental handling and high-throughput analyses. Here, we established a simple and robust method to minimize the precipitation steps and yield ready-to-use RNA and protein in solutions. This method can be applied to samples in small quantities, such as protoplasts. Given the ease and the robustness of this new method, it will have broad applications in virology and other disciplines in molecular biology.
Dynamic Cancellation of Perceived Rotation from the Venetian Blind Effect
Authors: Dobias Joshua J. , Stine Wm Wren
Published: April 2019

Geometric differences between the images seen by each eye enable the perception of depth. Additionally, depth is produced in the absence of geometric disparities with binocular disparities in either the average luminance or contrast, which is known as the Venetian blind effect. The temporal dynamics of the Venetian blind effect are much slower (1.3 Hz) than those for geometric binocular disparities (4–5 Hz). Sine-wave modulations of luminance and contrast disparity, however, can be discriminated from square-wave modulations at 1 Hz, which suggests a non-linearity. To measure this non-linearity, a luminance or contrast disparity modulation was presented at a particular frequency and paired with a geometric disparity modulation that cancelled the perceived rotation induced by the luminance or contrast modulation. Phases between the luminance or contrast and the geometric modulation varied in 50 ms increments from −200 and 200 ms. When phases were aligned, observers perceived little or no rotation. When not aligned, a perceived rotation was induced by a contrast or luminance disparity that was then cancelled by the geometric disparity. This causes the perception of a slight jump. The Generalized Difference Model, which is linear in time, predicted a minimal probability in cases when luminance or contrast disparities occurred before the geometric disparities due to the slower dynamics of the Venetian blind effect. The Gated Generalized Difference Model, which is non-linear in time, predicted a minimal probability for offsets of 0 ms. Results followed the Gated model, which further suggests a non-linearity in time for the Venetian blind effect.
A Comparative Study on a Hydraulic and Water-Quality Analysis Method for Determining Rechlorination Injection Points for a Water-Supply Network
Authors: Lee Sang Myoung , Lee Ho Min , Yoo Do Guen , Kim Joong Hoon
Published: April 2019

Water supply facilities are vulnerable to extreme weather events, such as droughts and floods. To establish a sustainable solution that resists accidents and disasters, a distributed system is required. To supply high-quality tap water using the existing water-supply network, rechlorination facilities must be installed to secure residual chlorine at the pipe end. In this study, a process is developed to determine the injection points and dosages of rechlorination using the latest pressure-driven analysis. The method was compared to the results of demand driven analysis methods. The proposed model was applied to P City in Korea to draw results. A detailed evaluation was performed to study how water pressure head and demand-based hydraulic and water quality analysis results impact the injection points and dosages of rechlorination. Thus, the existing demand-based model shows significant spatial deviations in the pressure head in the presence of water pressure drops, which subsequently lead to over-estimation of chlorine injection dosages for maintaining the concentration of residual chlorine. However, the proposed model involves a numerically validated theory and draws more reasonable results for hydraulic, water quality, and rechlorination dosages. The proposed model can be used as a decision-making tool based on hydraulic analysis for the supply of water of a stable quality.
Protection of the Liuzheng Water Source: A Karst Water System in Dawu, Zibo, China
Authors: Zhu Henghua , Dong Yanan , Xing Liting , Lan Xiaoxun , Yang Lizhi , Liu Zhizheng , Bian Nongfang
Published: April 2019

The Dawu water source is a rare, large-scale groundwater source located in northern China. The water supply function from this water source has, however, been lost due to anthropogenic pollution. In order to fully utilize valuable groundwater resources, a new water source of urban domestic water in Liu Zheng is planned. In this study, a tracer test and a numerical simulation method are used to examine the hydraulic connection between the Liuzheng water source and the Wangzhai industrial park; to optimize the exploitation layout of the Liuzheng water source and Dawu water source; and to propose the extent of the Liuzheng water source protection area. Results indicate that: (1) Karst development in the study area is uneven, and the Wangzhai area is a recharge area of the Liuzheng water source; (2) it is predicted that the groundwater flow field will not be significantly changed when a groundwater volume of 150,000 m3/day is exploited from the Liuzheng water source; (3) it is predicted that the proposed chemical park in Wangzhai will gradually pollute to the groundwater in the northern area of Liuzheng; and (4) results using the empirical formula method and the numerical simulation method indicate that the area of the primary protection area of the Liuzheng water source is about 0.59 km2, and the area of the secondary protection area is about 14.98 km2. Results from this study provide a certain technical basis for the exploitation and protection of groundwater in the Liuzheng water source.
Water–Energy Nexus in Typical Industrial Water Circuits
Authors: Oliveira Miguel C. , Iten Muriel , Matos Henrique A. , Michels Jochen
Published: April 2019

Water–energy nexus has been recognized as an important and challenging issue, namely in industry. This is due to industry reforms, increasing demand, and climate change. This concept focuses on the link between energy and water infrastructure. Overall, there is limited understanding of the nature of this link, as it is assumed that water is not a threat to the energy sector or an influence of the electricity to the water resources. This work aims to present and evaluate case studies related to typical industrial water circuits. These circuits represent some of the most relevant industrial sectors in terms of water–energy nexus such as: steel industry, chemical industry, paper and pulp industry, and food industry. Moreover, these sectors also cover typical industrial water circuits, namely: cooling circuit, gas washing circuit, water treatment circuit, transportation circuit, and quenching circuit. The circuits have firstly been assembled in OpenModelica software considering the equipment and physical layout of each circuit. According to their actual operation conditions, the energy and water consumption have been estimated. Furthermore, water and energy efficiency improvement measures have been proposed and implemented into the assembled models. This enabled a techno-economic assessment based on the implementation of the improvement measures. In order to contextualise these results into the industrial trends, the achieved water and energy savings are projected into potential national and sectorial savings considering the current levels of water and energy demand for each sector.
SÍNTESIS DE TETRAFENÓXIDOS DE TITANIO Y SU EVALUACIÓN CATALÍTICA EN DIMERIZACIÓN DE ETILENO.
Authors: Mendoza Carlos , Amaya Sandra L. , Vivas July Carolina , Echavarría Adriana
Published: April 2019

Nuevos complejos de titanio de fórmula general Ti(OAr)4•HOR con diferente grupo sustractor (Cl,CN, NO2), se sintetizaron por el método intercambio alcohol-fenol y se caracterizaron por resonancia magnética nuclear (1H NMR) que dio evidencia de la formación de estructuras diméricas con centros de Ti coordinado octaédricamente; y por análisis termogravimétrico (TGA) que registró pérdida de volátiles y permitió ajustar el peso molecular experimental de cada pre-catalizador. Mediante el análisis químico por absorción atómica se determinó el porcentaje elemental de aluminio en el co-catalizador de composición trietilaluminio. Los complejos de Ti en presencia de trietilaluminio se evaluaron en la reacción de dimerización de etileno a 50 °C, presión atmosférica y con flujo de etileno igual a 100 mL/min donde se observó en todos los catalizadores actividad hacia la producción de 1-buteno.
Competencia Informática Pedagógica del Docente. Teorías y Modelos que la Fundamentan
Authors: Rivas Vega Manuel Adrián , García Fernández Oscar
Published: April 2019

Con el fin de argumentar un modelo pedagógico se realizó un estudio de algunas teorías de la tecnología educativa que se relacionan con la formación informática del docente. En este trabajo se propone exponer brevemente los aportes de algunas de esas teorías a la explicación del proceso de formación informática pedagógica del docente. Se hace un análisis crítico de los modelos y teorías estudiadas. Se exponen, sus ideas esenciales, sus limitaciones y sus aportes fundamentales a la modelación del proceso de formación informática pedagógica del docente con un enfoque integrador y humanista.
Incidencia del Rol de la Familia en el Desarrollo Motor de Educandos de 3 y 4 años en un Centro de Educación Básica Localizado al Sur de Guayaquil
Authors: Cajamarca Encalada Rosa Elena
Published: April 2019

El objetivo del presente artículo es analizar la incidencia del rol de la familia en el desarrollo motor infantil dentro del área de educación inicial. Este estudio está basado en la experiencia del autor como docente en un Centro de Educación Básica ubicado en la Cdla. Floresta 1, Av. Roberto Serrano al sur de la ciudad de Guayaquil durante el año lectivo 2017-2018. El enfoque utilizado es de tipo mixto, el alcance de la investigación es de tipo descriptivo y explicativo, los métodos utilizados son no experimental, etnográfico y deductivo, las técnicas implementadas son observación, entrevista y encuesta. La muestra del estudio comprende 40 educandos en edades de 3 y 4 años, y 35 padres de familia. Las principales dificultades del desarrollo motor que se detectaron comprenden en las habilidades de motricidad fina: la pinza digital y en las habilidades de motricidad gruesa:  la coordinación y equilibrio corporal.
Forecasting of Apricot Production of Turkey by Using Box-Jenkins Method
Authors: KILIÇ TOPUZ Bakiye , BOZOĞLU Mehmet , BAŞER Uğur , ALHAS EROĞLU Nevra
Published: April 2019

Turkey is the first largest apricot
producer in the world. In 2016, Turkey was responsible for 9,21% of world
apricot production with 730 thousand tons. Turkey also generated 11,31% of
world apricot exports in 2016. The main aim of this research was to forecast
apricot production of Turkey for the period of 2017-2022. The data of this
study was obtained from the database of the Food and Agriculture Organization
and the time series covered the period of 1961-2016. Box-Jenkins Model was used
to forecast apricot production. In the study, it was determined that the time
series were not stationary and the series became stationary after the first
difference was taken. Moving Average Model ARIMA (2, 1, 1) was determined as
the most appropriate model for the stationary data type. The research results
show that apricot production quantities of Turkey in 2017 was forecasted as
minimum 383.206 tons, maximum 920.409 tons and, average 651.808 tons. However,
Turkey’s the apricot production amount in 2022 was forecasted as minimum 271.734
tons, maximum 1.193.113 tones and average 732.423 tons. Considering the
increase in demand, it is thought that apricot production will not be
sufficient for the country. To protect the current leading position of the
country, it is recommended that the government should give enough support to
increase apricot production in Turkey.
Synthesis of a novel category of pseudo-peptides using an Ugi three-component reaction of levulinic acid as bifunctional substrate, amines, and amino acid-based isocyanides
Authors: Khalesi Maryam , Ziyaei Halimehjani Azim , Martens Jürgen
Published: April 2019

The synthesis of a novel category of pseudo-peptides via intramolecular Ugi reaction of levulinic acid (4-oxopentanoic acid), aromatic and aliphatic amines, and amino acid-based isocyanides is reported. Levulinic acid was applied as a bifunctional substrate containing both carbonyl and acid moieties suitable for the Ugi reaction. This article provides a facile and convenient one-pot procedure for the synthesis of peptide-like heterocyclic molecules containing 2-pyrrolidone (γ-lactam), amide and ester functional groups with good to excellent yields.
SOLUTION OF THE SYSTEM OF PARAMETRIC EQUATIONS OF THE SESSILE DROP
Authors: Ciupaila R. , Sapagovas M.
Published: April 2019

Several models of parameterization for the problem of free surface of the sessile liquid drop with nonlocal integral condition of prescribed volume are considered. The paper aims to obtain for every model specific algebraic connection among physical and geometrical parameters of the problem and compare them. This connection allows to construct the iterative process for the unknown radius of the drop with more simple boundary conditions. The positiveness of Lagrange multiplier in the problem of constrained minimization as well as uniqueness of positive meaning of the radius of the drop are proven in the paper.
ON APPROXIMATE METHODS OF TANGENT HYPERBOLAS
Authors: Kaldo I. , Vaarmann O.
Published: April 2019

For solving a nonlinear operator equation in Banach space setting approximate variants of the method of tangent hyperbolas are considered. This family of approximate methods includes as special cases methods based on the use of iterative methods to obtain a cheap solution of limited accuracy for associated linear equations at each iteration step as well. A local convergence theorem and rate of convergence for the methods under discussion are given. Computational aspects and possibilities of organizing parallel computation are discussed. Computational experience with various multiprocessors indicates that performance of parallel methods depends critically on efficient load balancing. Problems of allocating subproblems to the processors are also briefly discussed.
TRANSIENT VISCOUS FLOW IN AN ANNULUS
Authors: Kolyshkin A. A. , Volodko I.
Published: April 2019

The method of matched asymptotic expansions is used in the present paper to derive an approximate solution for transient flow of a viscous incompressible fluid in an annulus. The transient is caused by a sudden reduction of flow rate to zero. The laminar flow before deceleration can be either steady or unsteady but unidirectional. The solution is valid for short time intervals after sudden deceleration.
FUNCTIONALS WITH VALUES IN THE NON‐ARCHIMEDEAN FIELD OF LAURENT SERIES AND THEIR APPLICATIONS TO THE EQUATIONS OF ELASTICITY THEORY. I
Authors: Radyna M.
Published: April 2019

Functionals with values in Non‐Archimedean field of Laurent series applied to the definition of generalized solution (in the form of soliton) of the Hopf equation. Calculation method for the profile of infinitely narrow soliton is proposed. Applying this method, calculations of profiles are reduced to the nonlinear system of algebraic equations in R n+1, n > 1. It is shown that there is a possibility to find out some of the solutions of this system using the Newton iteration method. Example and numerical test are considered.
MULTI-OBJECTIVE SYMBIOTIC ORGANISMS OPTIMIZATION FOR MAKING TIME-COST TRADEOFFS IN REPETITIVE PROJECT SCHEDULING PROBLEM
Authors: Tran Duc-Hoc , Chou Jui-Sheng , Luong Duc-Long
Published: April 2019

Time-cost problems that arise in repetitive construction projects are commonly encountered in project scheduling. Numerous time-cost trade-off approaches, such as mathematical, metaheuristic, and evolutionary methods, have been extensively studied in the construction community. Currently, the scheduling of a repetitive project is conducted using the traditional precedence diagramming method (PDM), which has two fundamental limitations: (1) progress is assumed to be linear from start to finish; and (2) activities in the schedule are connected each other only at the end points. This paper proposes a scheduling method that allows the use of continuous precedence relationships and piece-wise linear and nonlinear activity-time-production functions that are described by the use of singularity functions. This work further develops an adaptive multiple objective symbiotic organisms search (AMOSOS) algorithm that modifies benefit factors in the basic SOS to balance exploration and exploitation processes. Two case studies of its application are analyzed to validate the scheduling method, as well as to demonstrate the capabilities of AMOSOS in generating solutions that optimally trade-off minimizing project time with minimizing the cost of non-unit repetitive projects. The results thus obtained indicate that the proposed model is feasible and effective relative to the basic SOS algorithm and other state-of-the-art algorithms.
The Origin of Kepler-419b: A Path to Tidal Migration Via Four-body Secular Interactions
Authors: Jackson Jonathan M. , Dawson Rebekah I. , Zalesky Joseph
Published: April 2019

We test the high-eccentricity tidal migration scenario for Kepler-419b, a member of the eccentric warm Jupiter class of planets whose origin is debated. Kepler-419 hosts two known planets (b,c). However, in its current configuration, planet c cannot excite the eccentricity of planet b enough to undergo high-eccentricity tidal migration. We investigate whether the presence of an undiscovered fourth body could explain the orbit of Kepler-419b. We explore the parameter space of this potential third giant planet using a suite of N-body simulations with a range of initial conditions. From the results of these simulations, coupled with observational constraints, we can rule out this mechanism for much of the parameter space of the initial object d conditions. However, for a small range of parameters (masses between 0.5 and 7 m
Jup, semimajor axes between 4 and 7.5 au, eccentricities between 0.18 and 0.35, and mutual inclinations near 0°) an undiscovered object d could periodically excite the eccentricity of Kepler-419b without destabilizing the system over 1 Gyr while producing currently undetectable radial velocity and transit timing variation signals.
Forbush Decreases and <2 Day GCR Flux Non-recurrent Variations Studied with LISA Pathfinder
Authors: Armano M. , Audley H. , Baird J. , Benella S. , Binetruy P. , Born M. , Bortoluzzi D. , Castelli E. , Cavalleri A. , Cesarini A. , Cruise A. M. , Danzmann K. , Silva M. de Deus , Diepholz I. , Dixon G. , Dolesi R. , Fabi M. , Ferraioli L. , Ferroni V. , Finetti N. , Fitzsimons E. D. , Freschi M. , Gesa L. , Gibert F. , Giardini D. , Giusteri R. , Grimani C. , Grzymisch J. , Harrison I. , Heinzel G. , Hewitson M. , Hollington D. , Hoyland D. , Hueller M. , Inchauspé H. , Jennrich O. , Jetzer P. , Karnesis N. , Kaune B. , Korsakova N. , Killow C. J. , Kudela K. , Laurenza M. , Lobo J. A. , Lloro I. , Liu L. , López-Zaragoza J. P. , Maarschalkerweerd R. , Mance D. , Meshksar N. , Martín V. , Martin-Polo L. , Martino J. , Martin-Porqueras F. , Mateos I. , McNamara P. W. , Mendes J. , Mendes L. , Nofrarias M. , Paczkowski S. , Perreur-Lloyd M. , Petiteau A. , Pivato P. , Plagnol E. , Ramos-Castro J. , Reiche J. , Robertson D. I. , Rivas F. , Russano G. , Slutsky J. , Sopuerta C. F. , Sumner T. , Telloni D. , Texier D. , Thorpe J. I. , Vetrugno D. , Villani M. , Vitale S. , Wanner G. , Ward H. , Wass P. , Weber W. J. , Wissel L. , Wittchen A. , Zweifel P.
Published: April 2019

Non-recurrent short-term variations of the galactic cosmic-ray (GCR) flux above 70 MeV n−1 were observed between 2016 February 18 and 2017 July 3 on board the European Space Agency LISA Pathfinder (LPF) mission orbiting around the Lagrange point L1 at 1.5 × 106 km from Earth. The energy dependence of three Forbush decreases is studied and reported here. A comparison of these observations with others carried out in space down to the energy of a few tens of MeV n−1 shows that the same GCR flux parameterization applies to events of different intensity during the main phase. FD observations in L1 with LPF and geomagnetic storm occurrence are also presented. Finally, the characteristics of GCR flux non-recurrent variations (peaks and depressions) of duration <2 days and their association with interplanetary structures are investigated. It is found that, most likely, plasma compression regions between subsequent corotating high-speed streams cause peaks, while heliospheric current sheet crossing causes the majority of the depressions.
Dark Energy Survey Year 1 Results: Detection of Intracluster Light at Redshift ∼ 0.25
Authors: Zhang Y. , Yanny B. , Palmese A. , Gruen D. , To C. , Rykoff E. S. , Leung Y. , Collins C. , Hilton M. , Abbott T. M. C. , Annis J. , Avila S. , Bertin E. , Brooks D. , Burke D. L. , Rosell A. Carnero , Kind M. Carrasco , Carretero J. , Cunha C. E. , D’Andrea C. B. , Costa L. N. da , Vicente J. De , Desai S. , Diehl H. T. , Dietrich J. P. , Doel P. , Drlica-Wagner A. , Eifler T. F. , Evrard A. E. , Flaugher B. , Fosalba P. , Frieman J. , García-Bellido J. , Gaztanaga E. , Gerdes D. W. , Gruendl R. A. , Gschwend J. , Gutierrez G. , Hartley W. G. , Hollowood D. L. , Honscheid K. , Hoyle B. , James D. J. , Jeltema T. , Kuehn K. , Kuropatkin N. , Li T. S. , Lima M. , Maia M. A. G. , March M. , Marshall J. L. , Melchior P. , Menanteau F. , Miller C. J. , Miquel R. , Mohr J. J. , Ogando R. L. C. , Plazas A. A. , Romer A. K. , Sanchez E. , Scarpine V. , Schubnell M. , Serrano S. , Sevilla-Noarbe I. , Smith M. , Soares-Santos M. , Sobreira F. , Suchyta E. , Swanson M. E. C. , Tarle G. , Thomas D. , Wester W. ,   (DES Collaboration)
Published: April 2019

Using data collected by the Dark Energy Survey (DES), we report the detection of intracluster light (ICL) with ∼300 galaxy clusters in the redshift range of 0.2–0.3. We design methods to mask detected galaxies and stars in the images and stack the cluster light profiles, while accounting for several systematic effects (sky subtraction, instrumental point-spread function, cluster selection effects, and residual light in the ICL raw detection from background and cluster galaxies). The methods allow us to acquire high signal-to-noise measurements of the ICL and central galaxies (CGs), which we separate with radial cuts. The ICL appears as faint and diffuse light extending to at least 1 Mpc from the cluster center, reaching a surface brightness level of 30 mag arcsec−2. The ICL and the cluster CG contribute 44% ± 17% of the total cluster stellar luminosity within 1 Mpc. The ICL color is overall consistent with that of the cluster red sequence galaxies, but displays the trend of becoming bluer with increasing radius. The ICL demonstrates an interesting self-similarity feature—for clusters in different richness ranges, their ICL radial profiles are similar after scaling with cluster R
200m
, and the ICL brightness appears to be a good tracer of the cluster radial mass distribution. These analyses are based on the DES redMaPPer cluster sample identified in the first year of observations.
Prognathodes geminus, a new species of butterflyfish (Teleostei, Chaetodontidae) from Palau
Authors: Copus Joshua M. , Pyle Richard L. , Greene Brian D. , Randall John E.
Published: April 2019

A new species of the butterflyfish genusPrognathodes(Chaetodontidae) is described from two specimens collected at a depth of 116 m off Ngemelis Island, Palau.Prognathodesgeminussp. n.is similar toP.basabeiPyle & Kosaki, 2016 from the Hawaiian archipelago, andP.guezei(Maugé & Bauchot, 1976) from the western Indian Ocean, but differs from these species in the number of soft dorsal-fin rays, size of head, body width, and body depth. There are also subtle differences in life color, and substantial differences in the mtDNA cytochrome oxidase I sequence (d ≈ 0.08). Although genetic comparisons withP.guezeiare unavailable, it is expected that the genetic divergence betweenP.guezeiandP.geminuswill be even greater than that betweenP.geminusandP.basabei. It is named for the strikingly similar color pattern it shares withP.basabei.
Influence of treated mud on free shrinkage and cracking tendency of self-compacting concrete equivalent mortars
Authors: Taieb F. , Belas N. , Mesbah H. A.
Published: April 2019

The present work aims at studying the formulation and characterization of self-compacting concrete equivalent mortars, using calcined mud from the dredged sediments brought from the dam (Western Algeria) and fly ash from the Central Thermal EDF (France). Three SCCEM samples were prepared; a control mortar sample and two mortar samples containing 22% of mineral additions, with a ratio W/B = 0.47. The analysis of the experimental results obtained indicates that mortars comprising calcined mud develop greater compressive strengths than those containing fly ash. Regarding free shrinkage, mortar with calcined mud is characterized by an autogenous shrinkage similar to those of control and fly ash mortars. However, it is more sensitive to total shrinkage and drying as compared to the other mortars. Under the conditions of restrained shrinkage, control and calcined mud mortars are more sensitive to early cracking than mortar based on fly ash.
An Integrated Approach Using Interpretive Structural Modeling and Quality Function Deployment for Improving Indian Retail Service Quality
Authors: Sreekumar  , Gopalan Rema , Satpathy Biswajit
Published: April 2019

This article attempts to develop a model by integrating interpretive structural modeling (ISM) and quality function deployment (QFD) methodology by establishing the relationship between the Indian retail service quality dimensions and service quality enablers. The integrated approach is employed to translate customers' requirements/needs into specific service design factors/requirements in the Indian retail context. The retail service quality dimensions are identified using factor analysis and are considered as the customer demands in QFD process. Thirteen retail enablers were identified through an extensive literature survey and expert opinions. The enablers identified for the study were treated as design requirement for employing quality function deployment (QFD) in order to prioritize the design requirements. The results found showed that retail enablers ‘Image of the Store' and ‘Value Conscious Consumers' can be emphasized more in a priority basis by the Indian retailers followed by retail enablers ‘Location of store' and ‘Globalization/Competition'.
Exploring Visual Analytics to Measure Reliability for IoT Oriented Pollution Detection Software Perspectives
Authors: Kumar Nishi Kant , Banerjee Soumya
Published: April 2019

The measurement of the reliability of such IoT based application requires an embedded analysis. The parameters are the number of imprecise or faulty measures as well as the identification of core modules. This article investigates that how far visual introspection can assist in troubleshooting of IoT-based software bugs. This specific requirement improvises a new idea, where the shape of the plots with actual data can indicate the cause of the error and further they can be patched if the software repairing strategies are implemented adjudging the visual analytics. It is quite indifferent to analyze faults for existing applications as a variation of topological and practicing parameters which takes substantial numbers of iterations and observations. Categorically, the present use-case establishes the fact to analyze and infer concerning the shape of the visual plots derived from embedded modules.
An Efficient, Secure, and Queryable Encryption for NoSQL-Based Databases Hosted on Untrusted Cloud Environments
Authors: Alenezi Mamdouh , Usama Muhammad , Almustafa Khaled , Iqbal Waheed , Raza Muhammad Ali , Khan Tanveer
Published: April 2019

NoSQL-based databases are attractive to store and manage big data mainly due to high scalability and data modeling flexibility. However, security in NoSQL-based databases is weak which raises concerns for users. Specifically, security of data at rest is a high concern for the users deployed their NoSQL-based solutions on the cloud because unauthorized access to the servers will expose the data easily. There have been some efforts to enable encryption for data at rest for NoSQL databases. However, existing solutions do not support secure query processing, and data communication over the Internet and performance of the proposed solutions are also not good. In this article, the authors address NoSQL data at rest security concern by introducing a system which is capable to dynamically encrypt/decrypt data, support secure query processing, and seamlessly integrate with any NoSQL- based database. The proposed solution is based on a combination of chaotic encryption and Order Preserving Encryption (OPE). The experimental evaluation showed excellent results when integrated the solution with MongoDB and compared with the state-of-the-art existing work.
Static analysis of dump truck chassis frame made of composite materials
Authors: Siraj Adem , Babu N. Ramesh , Reddy K. Sirinivasa
Published: April 2019

For a heavy vehicle, the chassis frame is a strong member responsible for carrying the utmost lead in a safe manner when considering all the designed working situations. This paper elaborates on the static structural examination concerning the heavy duty truck chassis frame to determine the response of a truck chassis under the influence of three different load considerations such as bending, torsion and combined bending and torsion load cases acting on the horizontal C-Channel. In this paper, the dimensions of a heavy vehicle chassis of a FAW dump truck vehicle is obtained from Bishoftu Automobile Industry to model and examine an heavy vehicle chassis and the conventional materials are substituted with composite materials made up of carbon-epoxy couple with E-glass epoxy with same geometry under similar pressure or load with a steel chassis. The software employed in this work is the CATIA V5 R19 to model and the ANSYS 14.5 for the finite element analysis. The result shows that composite materials mainly carbon epoxy have high load carrying capacity and higher factor of safety than to e-glass epoxy and mild steel, and the weight of the chassis is reduced by 4.8 times for carbon epoxy and 3 times for glass epoxy. Generally using composite materials for chassis frame is safe. Material substitution is the best way to reduce weight of the vehicle so as to reduce fuel consumption and atmospheric emission which is the global issue.Keywords: Chassis, composite materials, stress, deformation
Performance and predict the ball bearing faults using wavelet packet decomposition and ANFIS
Authors: Pathiran Arun R. , Erikiananda K , Getachew T , Gziabher Haftom G.
Published: April 2019

Element bearings are widespread significant parts of rotary machinery in industries and their condition monitoring through fault detection and isolation methods are of superior interests to engineers. Condition monitoring could assist in attaining effective system maintenance and the automation processes. Nonetheless, despite the availability of diverse bearing fault detection methods, there is paucity of literature concerning the theoretical modelling of the bearing faults using mathematical representations. The principal goal of this communication is to build up an approach to predict ball bearing fault, including ball fault, outer race fault and inner race fault. The proposed method uses the vibration data collected from the rotating ball bearing and predicts the type of fault. The proposed method is based on wavelet decomposition method, PCA, ANFIS and SVM. The vibration data is decomposed into 3rd level wavelet components using wavelet packet decomposition; each wavelet component has been divided into several energy segments, these 3rd level wavelet components are reduced to lower level components using Principal Component Analysis (PCA). ANFIS algorithm is trained using the reduced feature set as input and the type of fault as output. The trained ANFIS algorithm is validated using another set of data. Support Vector Machine (SVM) has been used instead of ANFIS algorithm, the SVM based method gives more accurate prediction compared to that of ANFIS. The proposed method has been validated using the real-time data collected from the ball bearing setup. The validation results show that the proposed method exactly predicts the type of ball bearing fault. The real-time data validation results confirm the accuracy of the fault prediction method.Keywords: Principal component analysis, support vector machine; ANFIS; bearing
Processo decisório sob efeito de preferências: aversão e exposição ao risco
Authors: Kruger Silvana Dalmutt , Prestes Mateus , Mazzioni Sady , Petri Sérgio Murilo
Published: April 2019

O estudo tem como objetivo verificar de que forma as informações interferem no processo de tomada de decisão, a partir da Teoria dos Prospectos. Ponderando a hipótese de que a forma de apresentação de determinadas situações pode interferir no processo decisório, foram realizadas pequenas alterações no contexto de determinados problemas, para testar o efeito framing. Metodologicamente a pesquisa se caracteriza como descritiva, com procedimento experimental e abordagem predominantemente qualitativa. O experimento foi realizado a partir da aplicação de questionários, para acadêmicos do curso de Administração, a amostra é composta por 178 respondentes. Condizente com a Teoria dos Prospectos, os resultados evidenciam que quando expostos a situações negativas, os respondentes caracterizaram-se como mais propensos às situações de riscos, enquanto que em cenários positivos, se posicionaram com aversão às situações de perdas. Os resultados da análise estatística evidenciam que as variáveis experiência (medida pelo tempo de aprendizado e período do curso de administração) e o gênero, apresentaram relação de significância com a relação de aversão ao risco, destacando a importância da análise do efeito framing no processo de tomada de decisão.
Experimental study of the aerosol impact on fog microphysics
Authors: Mazoyer Marie , Burnet Frédéric , Denjean Cyrielle , Roberts Gregory C. , Haeffelin Martial , Dupont Jean-Charles , Elias Thierry
Published: April 2019

Abstract. Comprehensive field campaigns dedicated to fog life cycle observation were
conducted during the winters of 2010–2013 at the Instrumented Site for
Atmospheric Remote Sensing Research (SIRTA) observatory in a suburb of Paris.
In order to document their properties, in situ microphysical measurements
collected during 23 fog events induced by both radiative cooling and stratus
lowering are examined here. They reveal large variability in number,
concentration and size of both aerosol background before the fog onset and
fog droplets according to the different cases. The objective of this paper is
to evaluate the impact of aerosol particles on the fog microphysics. To
derive an accurate estimation of the actual activated fog droplet number
concentration Nact, we determine the hygroscopicity parameter
κ, the dry and the wet critical diameter and the critical
supersaturation for each case by using an iterative procedure based on the
κ-Köhler theory that combines cloud condensation nuclei (CCN), dry
particle and droplet size distribution measurements. Our study reveals low values of the derived critical supersaturation
occurring in fog with a median of 0.043 %. Consequently, the median dry
and wet activation diameters are 0.39 and 3.79 µm, respectively,
leading to a minor fraction of the aerosol population activated into droplets.
The corresponding Nact values are low, with median concentrations
of 53.5 and 111 cm−3 within the 75th percentile. The activated fraction
of aerosols exhibits remarkably low correlation with κ values, which
reflects the chemical composition of the aerosols. On the contrary, the
activated fraction exhibits a strong correlation with the inferred critical
diameter throughout the field campaigns. This suggests that the variability
in the activated fraction is mostly driven by particle size, while variations
in aerosol composition are of secondary importance. Moreover, our analysis
suggests that the supersaturation reached in fog could be lowered by the
aerosol number concentration, which could contribute to the sink term of
water vapor during the radiative cooling. Although radiative fogs are
usually associated with higher aerosol loading than stratus-lowering events,
our analysis also reveals that the activated fraction at the beginning of the
event is similar for both types of fog. However, the evolution of the droplet
concentration during the fog life cycle shows significant differences between
both types of fog. This work demonstrates that an accurate calculation of supersaturation is
required to provide a realistic representation of fog microphysical
properties in numerical models.
Differing pre-industrial cooling trends between tree-rings and lower-resolution temperature proxies
Authors: Klippel Lara , St. George Scott , Büntgen Ulf , Krusic Paul J. , Esper Jan
Published: April 2019

Abstract. The 692 proxy records of the new PAGES 2k compilation offer an unprecedented opportunity to study regional to global temperature trends associated with orbitally-driven changes in solar irradiance over the past two millennia. Here, we analyse the significance of long-term trends from 1–1800 CE in the PAGES 2k compilation’s tree-ring, ice core, marine and lake sediment records and find, unlike ice-cores, glacier dynamics, marine and lake sediments, no suggestion of a pre-industrial cooling trend in the tree-ring records. To understand why the tree-ring proxies lack a significant pre-industrial cooling, we divide the dendro data by location (high NH latitudes vs. mid latitudes), seasonal response (annual vs. summer), detrending method, and temperature sensitivity (high vs. low). We conclude the ability to detect any pre-industrial, millennial-long cooling in the tree-ring proxies does not increase with latitude, seasonal sensitivity, or detrending method. Consequently, caution is advised when using multi-proxy approaches to reconstruct long-term temperature changes.