bluuebunny/crossref_metadata_2025 huggingface dataset:
Electrophysiological responses to negative evaluative person-knowledge: Effects of individual differences
Authors: Krasowski Claudia , Schindler Sebastian , Bruchmann Maximilian , Moeck Robert , Straube Thomas
Published: April 2021

Faces transmit rich information about a unique personal identity. Recent studies examined how negative evaluative information affects event-related potentials (ERPs), the relevance of individual differences, such as trait anxiety, neuroticism, or agreeableness, for these effects is unclear. In this preregistered study, participants (N= 80) were presented with neutral faces, either associated with highly negative or neutral biographical information. Faces were shown under three different task conditions that varied the attentional focus on face-unrelated features, perceptual face information, or emotional information. Results showed a task-independent increase of the N170 component for faces associated with negative information, while interactions occurred for the Early Posterior Negativity (EPN) and the Late Positive Potential (LPP), showing ERP differences only when paying attention to the evaluative information. Trait anxiety and neuroticism did not influence ERP differences. Low agreeableness increased EPN differences during perceptual distraction. Thus, we observed that low agreeableness leads to early increased processing of potentially hostile faces, although participants were required to attend to a face-unrelated feature.
Visual Metaphors in Posters during the Coronavirus Pandemic in China
Authors: Дубинина М.Н.
Published: April 2021

В период борьбы с коронавирусом в Китае, благодаря большой степени информационного и эмоционального воздействия, распространение получили плакаты. В рамках данного исследования было проанализировано более 70 плакатов и постеров, опубликованных в СМИ и социальных сетях. Целью данного исследования является рассмотрение особенностей визуальной метафоры китайских плакатов,
в частности анализ возможности корреляции иероглифа с семиотическим пространством плаката.

In the period of fighting the coronavirus in China, posters became widespread due to a large degree of informational and emotional impact. As part of this study, more than 70 posters published in the media and social networks were analyzed. The purpose of this study is to examine the features of the visual metaphor of Chinese posters, in particular, to analyze the possibility of correlating a Chinese character with the semiotic space of a poster.
ACTIVIDAD ANTIOXIDANTE, POLIFENOLES Y FLAVONOIDES DE Coffea arabica de CINCO REGIONES PERUANAS
Authors: Suárez Cunza Silvia , Alfaro Pillihuaman Elvi , Ramírez Roca Emilio German
Published: April 2021

El café preparado de diversas formas contiene fenoles y flavonoides con actividad antioxidante y con beneficios para la salud. El café peruano cuenta con escasa información sobre sus propiedades antioxidantes. Los objetivos fueron evaluar la capacidad antioxidante total in vitro, y el contenido de fenoles totales y flavonoides de cafés procedentes de los valles de Chanchamayo (Junín), Tutumbaro (Ayacucho), Oventeni (Ucayali), Jaén (Cajamarca) y Quillabamba (Cusco). Las muestras se prepararon por infusión al 2 % p/v. Se determinaron sólidos solubles por refractometría y densidad aparente por gravimetría; fenoles totales con el reactivo de Folin-Ciocalteau y flavonoides según Zhishen. La capacidad antioxidante total se evaluó empleando DPPH, ABTS.+ y FRAP, los resultados se expresan como capacidad antioxidante equivalente a Trolox (TEAC) y como equivalente a ácido ascórbico (AAEAC). Se encontraron 2,8–3,0 mmol EAG/g de fenoles totales, los flavonoides fueron 135–155 μmol ECq/g. Los resultados de TEAC con DPPH estuvieron entre 44–52 mg/g y para AAEAC entre 41–50 mg/g; con el ABTS, la TEAC fue de 55–62 mg/g y AAEAC fue entre 47–52 mg/g; hubo diferencia significativa (p<0,05) para el DPPH y ABTS entre Junín y Cusco. En el FRAP, estuvieron entre 493 y 540 μmol EqFeSO4/g. No hubo diferencias significativas. Se concluye que los extractos acuosos de los granos tostados y molidos de Coffea arabica procedentes de los cinco valles poseen efecto antioxidante in vitro en asociación con el contenido de fenoles totales y flavonoides, la diferencia en capacidad antioxidante no es relevante. Este comportamiento es comparable con resultados reportados en la literatura internacional.
CAPACIDAD ANTIOXIDANTE DE EXTRACTOS OBTENIDOS DE LAS HOJAS DE Senecio rufescens DC
Authors: Aguilar Felices Enrique Javier , Bonilla Rivera Pablo Enrique , Enciso Roca Enciso Roca
Published: April 2021

Senecio rufescens DC es una planta altoandina utilizada tradicionalmente para tratar problemas del “mal de altura” y de dolencias gastrointestinales. En el proceso de adaptación a condiciones extremas, desarrolló su capacidad para biosintetizar metabolitos secundarios de gran importancia terapéutica como son los compuestos fenólicos. Por tanto, esta investigación se desarrolló con el objetivo de determinar el contenido de fenoles totales, flavonoides, flavonoles y la capacidad antioxidante del extracto metanólico de las hojas y de sus fracciones de n – hexano, diclorometano, acetato de etilo y metanólica, respectivamente. La fracción metanólica, mostró el mayor contenido de fenoles totales (149,81 ± 5,02 GAE/g de extracto), flavonoides (47,33 ± 2,27 QE/g de extracto) y flavonoles (14,34 ± 0,69 QE/g de extracto) (p < 0,05), respectivamente, mientras que su capacidad antioxidante (529,80 ± 14,30; 444,38 ± 11,31; 406,86 ± 24,58 μmoles ET/g de extracto, para los ensayos de DPPH, ABTS y FRAP, respectivamente) fue superior a las otras fracciones (p < 0,05). Se concluye que la fracción metanólica del extracto metanólico, demostró poseer un alto contenido de fenoles totales, flavonoides y flavonoles, así como, una alta capacidad antioxidante, respectivamente.
Mimar Sinan Era Kulliyes in the Ottoman Urban Landscape
Authors: Erarslan Alev
Published: April 2021

The Master Ottoman Architect Sinan, known as Mimar Sinan, produced numerous works of different character, among these, mosques, madrasahs, masjids (prayer rooms), khans (inns), caravanserais, covered bazaars, hammams (bath-houses), darüşşifa (hospitals), imarets (hospices), darülkurra (Koranic schools), sibyan mektebi (primary schools), tekke (lodges), waterways, aqueducts, fountains and palaces. Sinan is an architect that imprinted his mark upon his era by not repeating himself in any of the structures he created. Appointed the head of the Sultan's Society of Architects in 1538, Sinan created a great number of architectural works. Throughout the years of his long career in Ottoman architecture, in which time he produced an expansive typology of works, Architect Sinan also made a major contribution to urban planning. As Chief Architect, Sinan was responsible for many urban activities having to do with wastewater, fire prevention and the repair of many public buildings in Istanbul. Although documentation pertaining to Sinan's concept of the urban environment is scant, an analysis of all his structures suggests the existence of a delicate notion of city planning. Looking into the placement of the structures, their functional distribution within the city, the special roles they play in the general urban landscape, as well as their relationships to each other, it is not difficult to witness the rational conceptualization of a city. This article will attempt to examine the works of Architect Sinan in terms of his perspective on kulliye architecture, analyzing the contributions he made to these structures within the urban fabric, and to review his major kulliyes as intrinsic parts of the entirety of the city.
NEVZAT ARTUÇ, Cemal Paşa Askeri ve Siyasi Hayatı, Türk Tarih Kurumu Yayınları, (Gözden Geçirilmiş ve Genişletilmiş 2. Baskı), Ankara 2019, LXXII + 539 s. [Kitap Tanıtma]
Authors: Güçlü Yücel
Published: April 2021

İkinci Meşrutiyet Döneminin (1908-1918) önde gelen devlet adamlarından ve İttihat ve Terakki Cemiyeti (İTC) yönetiminin üç önderinden biri olan Cemal Paşa hakkında bugüne kadar Türkiye’de ve yurt dışında herhangi bir dilde yazılan ilk ve tek akademik biyografi özelliğindeki kitap başlıca şu konuları kapsamaktadır: ailesi, öğrenim hayatı ve askerlik mesleğine girişi; askerlik mesleğinde aldığı ilk görevler; Osmanlı Hürriyet Cemiyeti ile İTC’ye girişi ve faaliyetleri; İkinci Meşruriyetin ilanındaki rolü; kişiliği; Üsküdar Mutasarrıflığı; Adana Valiliği; Birinci ve İkinci Balkan Savaşları sırasındaki ve sonrasındaki icraatları; İstanbul Muhafızlığı; Nafia ve Bahriye Nazırlıkları; Birinci Dünya Savaşına giriş; Birinci ve İkinci Kanal Seferleri; Suriye’deki faaliyetleri; Ermeni meselesi; Birinci Dünya Savaşından sonra yurt dışına çıkışı ve buradaki faaliyetleri; Mustafa Kemal Paşa ile mektuplaşması ve ölümü. Ciddi bir emek sonunda hazırlanan çalışma; önsöz, kısaltmalar, kaynaklar ve tetkiklerden sonra giriş, dört ana bölüm ve sonuçtan meydana gelmektedir. Birbirinden ilginç fotoğrafların yer aldığı eserde çok geniş kaynakça ve ayrıntılı dizin mevcuttur. Ekler, İTC ve Birinci Dünya Savaşı alanlarında çalışma yapan birçok araştırmacı için değerli bir kaynaktır.
Prontuario de la naturaleza albacetense
Authors: Blanco Sidera Domingo , Picazo Talavera Juan
Published: April 2021

El prontuario de la naturaleza albacetense pretende recoger aquellos conocimientos inéditos, o publicados en otros medios, sobre la naturaleza de Albacete que, por su carácter puntual (citas), no tienen cabida en otras secciones de la revista SABUCO. Los criterios de selección son difíciles de unificar para todos los grupos taxonómicos.
Büntetőpolitika és társadalmi nyilvánosság
Authors: Pongó Tamás
Published: April 2021

The author provides an overview of the proceedings of a conference organized by the Hungarian Academy of Sciences and the Ministry of Interior.
COPRAS METHOD FOR MULTIPLE ATTRIBUTE GROUP DECISION MAKING UNDER PICTURE FUZZY ENVIRONMENT AND THEIR APPLICATION TO GREEN SUPPLIER SELECTION
Authors: Lu Jianping , Zhang Siqi , Wu Jiang , Wei Yu
Published: April 2021

The green supplier selection (GSS) is a significant part in green supply chain management (GSCM). Choosing optimal green supplier can not only realize the sustainable development of enterprises, but also maximize the utilization rate of resources and diminish the negative effect of environmental issues, which conforms to the theme of green development. As a multiple attribute group decision-making (MAGDM) issue, selecting optimal green supplier is of vital important to enterprises. However, how to select the optimal supplier for enterprises is a great challenge. To handle this issue, a novel picture fuzzy COPRAS (COmplex PRoportional Assessment) method is devised. First, some necessary theories related to picture fuzzy sets (PFSs) are briefly reviewed. In addition, a method called CRITIC (Criteria Importance Though Intercrieria Correlation) is utilized to calculate criteria’s weights. Afterwards, the conventional COPRAS method is extended to the PFSs to calculate each alternative’s utility degree. At last, the designed method is exacted to an application which is related to GSS and there also conduct some comparative analysis to demonstrate the designed method’s superiority. The final results show that the proposed model can be utilized to decide the optimum green supplier.
ADVANCES IN FUZZY TECHNIQUES AND APPLICATIONS: IN OCCASION OF LOTFI ZADEH 100 BIRTH ANNIVERSARY
Authors: Xu Zeshui , Herrera-Viedma Enrique
Published: April 2021

Advances in FUZZY techniques and applications: in occasion of Lotfi Zadeh 100 birth anniversary. Technological and Economic Development of Economy, 27(2), pp. 280-283.
Constraints on the Mass Accretion Rate onto the Supermassive Black Hole of Cygnus A Using the Submillimeter Array
Authors: Lo Wen-Ping , Asada Keiichi , Matsushita Satoki , Nakamura Masanori , Pu Hung-Yi , Tseng Chihyin , Akiyama Kazunori , Algaba Juan Carlos , Bower Geoffrey C. , Rao Ramprasad , Koay Jun Yi , Koch Patrick M. , Koyama Shoko , Ho Paul T. P , Inoue Makoto
Published: April 2021

We present the first detailed polarimetric studies of Cygnus A at 230 GHz with the Submillimeter Array (SMA) to constrain the mass accretion rate onto its supermassive black hole. We detected the polarized emission associated with the core at a fractional polarization of

. This low fractional polarization suggests that the polarized emission is highly depolarized. One of the possible explanations is due to a significant variance in the Faraday rotation measure within the synthesized beam. By assuming the Faraday depolarization caused by inhomogeneous column density of the magnetized plasma associated with the surrounding radiatively-inefficient accretion flow within the SMA beam, we derived the constraint on the mass accretion rate to be larger than 0.15

yr−1 at the Bondi radius. The derived constraint indicates that an adiabatic inflow–outflow solution or an advection-dominated accretion flow should be preferable as the accretion flow model in order to explain the jet power of Cygnus A.
Direct Observation of a Large-scale CME Flux Rope Event Arising from an Unwinding Coronal Jet
Authors: Chen Hechao , Yang Jiayan , Hong Junchao , Li Haidong , Duan Yadan
Published: April 2021

Coronal mass ejections (CMEs) and coronal jets are two types of common solar eruptive phenomena, which often independently happen at different spatial scales. In this work, we present a stereoscopic observation of a large-scale CME flux rope arising from an unwinding blowout jet in a multipolar complex magnetic system. Based on a multiband observational analysis, we find that this whole event starts with a small filament whose eruption occurs at a coronal geyser site after a series of homologous jets. Aided by magnetic field extrapolations, it reveals that the coronal geyser site forms above an elongate opposite-polarity interface, where the emergence-driven photospheric flux cancellation and repetitive reconnection are responsible for those preceding recurrent jets and also contribute to the ultimate filament destabilization. By interacting with overlying fields, the erupting filament breaks one of its legs, and results in an unwinding blowout jet. Our estimation suggests that around 1.4–2.0 turns of twist release in its jet spire. This prominent twist transport in the jet spire rapidly creates a newborn larger-scale flux rope from the jet base to a remote site. Soon after its formation, this large-scale flux rope erupts toward the outer coronae causing an Earth-directed CME. In its source region, two sets of distinct postflare loops form in succession, indicating this eruption involves two stages of flare magnetic reconnection. This work not only reveals a real magnetic coupling process between different eruptive activities but provides a new hint for understanding for the creation of large-scale CME flux ropes during the solar eruption.
Hybrid Simulations of Interstellar Pickup Protons Accelerated at the Solar-wind Termination Shock at Multiple Locations
Authors: Giacalone J. , Nakanotani M. , Zank G. P. , Kòta J. , Opher M. , Richardson J. D.
Published: April 2021

We estimate the intensity of interstellar pickup protons accelerated to ∼50 keV at various locations along the solar-wind termination shock, using two-dimensional hybrid simulations. Parameters for the solar wind, interstellar pickup ions (PUIs), and magnetic field just upstream of the termination shock at one flank of the heliosphere, and at the location in the downwind (or tail-ward) direction are based on a solar-wind/pickup-ion/turbulence model. The parameters upstream of the shock where Voyager 2 crossed are based on observations. The simulation is limited in size, and therefore cannot accurately model the distribution to energies much beyond ∼50 keV. This is sufficient to study the origin of the high-energy tail of the distribution, which is the low-energy portion of the anomalous cosmic-ray spectrum. We also extrapolate our results to other locations along the termination shock, such as the other flank, and the poles of the heliosphere. We find that the intensity of ∼10–50 keV accelerated pickup protons is remarkably similar at all three locations we simulated, suggesting that particles in this energy range are relatively uniformly distributed along the termination shock, and are likely quite uniform throughout the entire heliosheath. In addition, we find significant differences in the distribution in the 0.5–1 keV energy range for energetic neutral atoms coming from the tail region of the heliosphere compared to that at the nose or flank look directions. This is because the peak in the PUI distribution is at a higher energy there.
Geometric Distances of Quasars Measured by Spectroastrometry and Reverberation Mapping: Monte Carlo Simulations
Authors: Songsheng Yu-Yang , Li Yan-Rong , Du Pu , Wang Jian-Min
Published: April 2021

Recently, GRAVITY on board the Very Large Telescope Interferometer (VLTI) first spatially resolved the structure of the quasar 3C 273 with an unprecedented resolution of ∼10 μas. A new method of measuring parallax distances has been successfully applied to the quasar through joint analysis of spectroastrometry (SA) and reverberation mapping (RM) observation of its broad-line region (BLR). The uncertainty of this SA and RM (SARM) measurement is about 16% from real data, showing its great potential as a powerful tool for precision cosmology. In this paper, we carry out detailed analyses of mock data to study impacts of data qualities of SA observations on distance measurements and establish a quantitative relationship between statistical uncertainties of distances and relative errors of differential phases. We employ a circular disk model of the BLR for the SARM analysis. We show that SARM analyses of observations generally generate reliable quasar distances, even for relatively poor SA measurements with error bars of 40% at peaks of phases. Inclinations and opening angles of BLRs are the major parameters governing distance uncertainties. It is found that BLRs with inclinations ≳10° and opening angles ≲40° are the most reliable regimes from SARM analysis for distance measurements. Through analysis of a mock sample of AGNs generated by quasar luminosity functions, we find that if the GRAVITY/GRAVITY+ can achieve a phase error of 0.°1 per baseline for targets with magnitudes K ≲ 11.5, the SARM campaign can constrain H
0 to an uncertainty of 2% by observing 60 targets.
Galaxy Clusters from the DESI Legacy Imaging Surveys. I. Cluster Detection
Authors: Zou Hu , Gao Jinghua , Xu Xin , Zhou Xu , Ma Jun , Zhou Zhimin , Zhang Tianmeng , Nie Jundan , Wang Jiali , Xue Suijian
Published: April 2021

Based on the photometric redshift catalog of Zou et al., we apply a fast clustering algorithm to identify 540,432 galaxy clusters at z ≲ 1 in the DESI legacy imaging surveys, which cover a sky area of about 20,000 deg2. Monte Carlo simulations indicate that the false-detection rate of our detecting method is about 3.1%. The total masses of galaxy clusters are derived using a calibrated richness–mass relation that is based on the observations of X-ray emission and the Sunyaev and Zel’dovich effect. The median redshift and mass of our detected clusters are about 0.53 and 1.23 × 1014
M
⊙, respectively. Comparing with previous clusters identified using the data of the Sloan Digital Sky Survey; we can recognize most of them, especially those with high richness. Our catalog will be used for further statistical studies on galaxy clusters and environmental effects on galaxy evolution, etc.
Freud et Jung : quelques raisons d’une séparation
Authors: Agnel Aimé
Published: April 2021

L’auteur reprend les raisons données par Jung de son désaccord avec Freud dans son livre de 1921 sur les Types psychologiques , et dans une conférence de 1929 intitulée « L’opposition entre Freud et Jung ». Dans ces textes, Jung met l’accent sur le caractère subjectif de toute psychologie, sur la pluralité des instincts, et l’importance du sentiment dans une recherche psychologique et dans la formation d’une éthique. Sa découverte d’un inconscient impersonnel et du sentiment d’égalité qu’il implique provoquera, vers la fin des années 1930, un changement d’attitude chez Jung, qui pourra se dire, dans une filiation enfin reconnue, le véritable continuateur de Freud.
Ferenczi et Jung : quelques lignes parallèles ?
Authors: Haynal André , Falzeder Ernst
Published: April 2021

Dans la complexité des interactions enchevêtrées au sein du groupe des pionniers de la psycho-analyse, de leurs intérêts et points de vue divergents, la relation Ferenczi-Jung est d’un intérêt particulier, étant donné l’importance que tous deux ont dans le domaine de l’histoire des idées. Il est frappant de découvrir quelques lignes parallèles, mais des facteurs interpersonnels, institutionnels et socioculturels ont contribué au fait que cette collaboration pacifique et complémentaire n’a pas été possible à long terme. Peut-être que pour la génération actuelle, en rétrospective, il est plus facile de constater des traits séminaux, et aussi certaines carences chez tous ces penseurs.
Freud, l’eau et le bain
Authors: Kamieniak Jean-Pierre
Published: April 2021

L’embarras du savant Freud à répondre à la suggestion de Romain Rolland – celle d’expliquer la provenance de la sensation océanique – tient fondamentalement au malaise de l’homme Freud – celui d’appréhender cet éprouvé auquel il ne put d’abord qu’être soumis, puis qui devint familier, et dont il fut même amateur. L’eau fut en effet un élément majeur à tous les âges de la vie de ce fils aimé, car à travers elle, c’est l’ombre de la mère qui s’imposait à lui mais n’en voulait rien savoir.
Dernières données sur la prise en charge des enfants en CMP-IJ en France métropolitaine : augmentation des recours aux soins et intensité des prises en charge
Authors: Cacheux Ludovic
Published: April 2021

Pivots de la prise en charge en pédopsychiatrie, les centres médico-psychologiques infanto-juvéniles ( cmp-ij ) sont des « unités de coordination et d’accueil en milieu ouvert qui organisent des actions de prévention, de diagnostic, de soins ambulatoires et d’interventions à domicile mises à la disposition de la population » (Arrêté du 14 mars 1986). Si plusieurs rapports récents ont souligné les difficultés de ces structures à faire face à l’évolution de la demande, l’activité des cmp-ij n’a fait l’objet que d’une description limitée. Malgré des limites importantes liées à la qualité de ces données et à la méthode du recueil d’information, l’analyse des bases de données médico-administratives ( rim-p ) permet d’appréhender quelques tendances de l’activité de ces structures.
Le CMP aujourd’hui : atouts, écueils et perspectives
Authors: Quantin Laure , Benoit Jean-Pierre
Published: April 2021

Depuis leur fondation en 1986, les cmp (centres médico-psychologiques) infanto-juvéniles sont chargés des missions d’accueil de prévention et de soins psychiques des bébés, des enfants et des adolescents. L’accès est gratuit, généraliste et proche du lieu de vie. Leurs fonctionnements s’appuient sur une équipe pluridisciplinaire organisée pour répondre aux spécificités du développement psychique des enfants. Ils font face aujourd’hui à de nouvelles contraintes. Confrontés à un doublement du nombre de demandes depuis leur fondation, des listes d’attente freinent la rapidité d’accès. Les troubles psychiques qu’ils accueillent sont plus complexes et plus sévères. La demande des familles et des institutions est conditionnée par les représentations contemporaines de la maladie mentale et de son diagnostic.
Groupe, portage et violoncelle : un espace pour exister
Authors: Cabaret Marine , Chambon Louise , Ferrara Pauline , Salvador Marie
Published: April 2021

Les autrices présentent un groupe thérapeutique pour enfants souffrant d’angoisses de morcellement. Ce dispositif groupal s’articule autour d’enveloppements physiques et sonores, à l’aide d’une médiation par le violoncelle. L’objectif de ce groupe est de proposer aux enfants un espace assez contenant et sécurisant pour leur permettre de s’apaiser, et d’acquérir un sentiment d’exister. Cet article décrit l’expérience de la première année de ce groupe, et les questionnements qu’ont rencontrés les thérapeutes.
Une analyse structurale des systèmes modaux
Authors: Héran Frédéric
Published: April 2021

À l’aide d’une analyse structurale, nous montrons que tout déplacement mobilise un mode fiable, un réseau suffisamment maillé, un utilisateur compétent et un ensemble de règles communes, le tout formant un système modal. Les deux premiers constituants correspondent au système technique de transport. Les deux derniers représentent la dimension humaine et sociale de la mobilité. Chaque constituant de ce système génère un effet particulier : de club, de parc, de réseau ou de sécurité. Pour qu’un système modal se développe, toutes ses composantes doivent progresser de concert, afin d’éviter qu’apparaissent des décalages qui ralentissent le processus. Les progrès s’accélèrent quand une certaine cohérence est trouvée. Tous les aspects de la mobilité peuvent être analysés à travers ce quadriptyque, comme les modèles de trafic en quatre étapes, la sécurité routière, le report modal ou les externalités négatives des transports. Classification JEL  : R40, R41.
A phase transition for circle maps with a flat spot and different critical exponents
Authors: Palmisano Liviana , Ndawa Bertuel Tangue
Published: April 2021

We study circle maps with a flat interval where the critical exponents at the two boundary points of the flat spot might be different. The space of such systems is partitioned in two connected parts whose common boundary only depends on the critical exponents. At this boundary there is a phase transition in the geometry of the system. Differently from the previous approaches, this is achieved by studying the asymptotical behavior of the renormalization operator.
Carleman estimates for a class of variable coefficient degenerate elliptic operators with applications to unique continuation
Authors: Banerjee Agnid , Manna Ramesh
Published: April 2021

In this paper, we obtain new Carleman estimates for a class of variable coefficient degenerate elliptic operators whose constant coefficient model at one point is the so called Baouendi-Grushin operator. This generalizes the results obtained by the two of us with Garofalo in [10] where similar estimates were established for the "constant coefficient" Baouendi-Grushin operator. Consequently, we obtain: (ⅰ) a Bourgain-Kenig type quantitative uniqueness result in the variable coefficient setting; (ⅱ) and a strong unique continuation property for a class of degenerate sublinear equations. We also derive a subelliptic version of a scaling critical Carleman estimate proven by Regbaoui in the Euclidean setting using which we deduce a new unique continuation result in the case of scaling critical Hardy type potentials.
Steady-state and first passage time distributions for waiting times in the $ MAP/M/s+G $ queueing model with generally distributed patience times
Authors: Gursoy Omer , Mehr Kamal Adli , Akar Nail
Published: April 2021

We study the \begin{document}$ MAP/M/s+G $\end{document} queueing model that arises in various multi-server engineering problems including telephone call centers, under the assumption of MAP (Markovian Arrival Process) arrivals, exponentially distributed service times, infinite waiting room, and generally distributed patience times. Using sample-path arguments, we propose to obtain the steady-state distribution of the virtual waiting time and subsequently the other relevant performance metrics of interest via the steady-state solution of a certain Continuous Feedback Fluid Queue (CFFQ). The proposed method is exact when the patience time is a discrete random variable and is asymptotically exact when it is continuous/hybrid, for which case discretization of the patience time distribution is required giving rise to a computational complexity depending linearly on the number of discretization levels. Additionally, a novel method is proposed to accurately obtain the first passage time distributions for the virtual and actual waiting times again using CFFQs while approximating the deterministic time horizons by Erlang distributions or more efficient Concentrated Matrix Exponential (CME) distributions. Numerical results are presented to validate the effectiveness of the proposed numerical method.
A full-modified-Newton step $ O(n) $ infeasible interior-point method for the special weighted linear complementarity problem
Authors: Chi Xiaoni , Wan Zhongping , Hao Zijun
Published: April 2021

The weighted complementarity problem (wCP) can be applied to a large variety of equilibrium problems in science, economics and engineering. Since formulating an equilibrium problem as a wCP may lead to highly efficient algorithms for its numerical solution, wCP is a nontrivial generalization of the complementarity problem. In this paper we consider a special weighted linear complementarity problem (wLCP), which is the more general optimization of the Fisher market equilibrium problem. A full-modified-Newton infeasible interior-point method (IIPM) for the special wLCP is proposed. The algorithm reformulates the central path of the perturbed problem as an equivalent system of equations, and uses only full-Newton steps at each iteration, so-called a feasibility step (i.e., a full-modified-Newton step) and several usual centering steps. The polynomial complexity of the algorithm is as good as the best known iteration bound for these types of IIPMs in linear optimization.
Quantitative stability of the ERM formulation for a class of stochastic linear variational inequalities
Authors: Liu Jianxun , Li Shengjie , Xu Yingrang
Published: April 2021

This paper focuses on the quantitative stability analysis of the expected residual minimization (ERM) formulation for a class of stochastic linear variational inequalities. Firstly, the existence of solutions of the ERM formulation and its perturbed problem is discussed. Then, the quantitative stability of the ERM formulation is derived under suitable probability metrics. Finally, the sample average approximation (SAA) problem of the ERM formulation is studied, and the rates of convergence of optimal solution sets are obtained under different assumptions.
Variable metric proximal stochastic variance reduced gradient methods for nonconvex nonsmooth optimization
Authors: Yu Tengteng , Liu Xin-Wei , Dai Yu-Hong , Sun Jie
Published: April 2021

We study the problem of minimizing the sum of two functions. The first function is the average of a large number of nonconvex component functions and the second function is a convex (possibly nonsmooth) function that admits a simple proximal mapping. With a diagonal Barzilai-Borwein stepsize for updating the metric, we propose a variable metric proximal stochastic variance reduced gradient method in the mini-batch setting, named VM-SVRG. It is proved that VM-SVRG converges sublinearly to a stationary point in expectation. We further suggest a variant of VM-SVRG to achieve linear convergence rate in expectation for nonconvex problems satisfying the proximal Polyak-Łojasiewicz inequality. The complexity of VM-SVRG is lower than that of the proximal gradient method and proximal stochastic gradient method, and is the same as the proximal stochastic variance reduced gradient method. Numerical experiments are conducted on standard data sets. Comparisons with other advanced proximal stochastic gradient methods show the efficiency of the proposed method.
Open Science por defecto. La nueva normalidad para la investigación
Authors: Méndez Eva
Published: April 2021

Este trabajo aborda el nuevo paradigma de la Open Science o ciencia en abierto desde la perspectiva europea, pero destacando su necesario alcance global. Se analiza el concepto, origen y evolución de la Open Science y se discuten sus retos y la demora de su completa implementación. Se parte de la hipótesis de que la Open Science debería de ser el paradigma de comunicación científico por defecto en el siglo XXI. En primer lugar, se revisa el concepto y alcance de Open Science frente a Open Access y en su interacción con Open Knowledge, así como la necesidad de mantener la denominación como «marca». En segundo lugar, se recogen los requisitos, reflexiones y parámetros para hacer de la ciencia un bien común y se describen los retos de la Open Science en Europa, que se han convertido en los principales pilares y/o elementos constitutivos de la ciencia en abierto. Se reflexiona sobre su puesta en práctica, detallando dos aproximaciones: 1) la creación de políticas y estrategias formales a nivel Estados miembros (top-down), y 2) la implementación bottom-up a través de Compromisos Prácticos de Implementación (PCIs). Asimismo, se destacan los problemas reales que alejan a los agentes implicados de protagonizar el cambio sistémico hacia la Open Science. Finalmente se reflexiona sobre el efecto de la COVID-19 que ha corroborado la necesidad urgente de la ciencia en abierto. Este artículo recoge, a modo de ensayo, la experiencia y el trabajo realizado en los últimos cuatro años en la European Open Science Policy Platform, donde la autora ha presidido el segundo mandato desde 2018 a 2020. La autora expone algunas de sus principales teorías en torno a la Open Science y defiende su tesis de los compromisos prácticos de implementación y la confluencia de aproximaciones de prácticas de los agentes implicados y políticas de ciencia abierta, así como su categórica aproximación a la Open Science como marca, actitud y derecho.
Coste de la publicación en abierto de artículos de autoría española en cinco áreas de las ciencias sociales
Authors: Ferrer-Sapena Antonia , Vidal-Cabo Christian , Aleixandre-Benavent Rafael , Valderrama-Zurián Juan Carlos
Published: April 2021

La publicación en abierto de los artículos conlleva unos gastos conocidos como cargos por procesamiento de artículos (APC, en sus siglas en inglés). El objetivo de este trabajo es determinar el coste de los artículos publicados en abierto mediante APC de autoría española en cinco categorías temáticas de las ciencias sociales: Humanities (Multidisciplinary), Sociology, Information Science & Library Science, Education & Educational Research y Communication de la Colección Principal de la Web of Science (WoS) durante el periodo 2012-2019. Se han identificado las revistas, las instituciones financiadoras y los modelos de publicación más frecuentes. El estudio indica que de las 223 revistas que publicaron artículos con APC las que más lo hicieron fueron Communication & Society (41), Comunicar (34) y el Profesional de la Información (20). El gasto total en APC fue de 481.120,4 € y el coste medio de 1.129 €. Las revistas con mayor coste fueron Computers & Education (34.416 €), Scientometrics (30.380 €) y IEEE Transactions on Learnig Technologies (26.026 €). Los modelos de publicación más frecuentes fueron DOAJ Gold (54%), Green Published (32%) y Green Accepted (28%). En el 53% de los artículos constaba que la financiación procedía del gobierno de España (principalmente a través de ministerios), en el 25% de gobiernos autonómicos, en el 21% de la Unión Europea y en el 20% de las universidades. El coste medio de los APC de las publicaciones estudiadas está dentro de las cantidades habituales a nivel mundial, siendo más caros los APC en revistas con impacto más alto y en las áreas Information Science & Library Science y Sociology. Conocer los APC puede orientar las políticas y el apoyo institucional al acceso abierto y mejorar de los recursos académicos.
Educación para el Desarrollo, codesarrollo y el papel de las personas migrantes. Una reflexión desde la Antropología a partir de un caso concreto
Authors: Vallés Marugán Alba
Published: April 2021

La presencia de migrantes provenientes de contextos diversos constituye un elemento definitorio de las plurales sociedades del norte global, por lo que se perciben como necesarias acciones que favorezcan la convivencia entre personas migrantes y autóctonas. En esta línea, una de las propuestas planteadas desde la Educación para el Desarrollo pasa por fomentar la integración mediante acciones que sensibilicen sobre el fenómeno migratorio y las experiencias de los y las migrantes, destacando proyectos en que estos asumen el rol de agentes de desarrollo, vinculando migraciones y desarrollo, del modo positivo planteado desde el codesarrollo.
A partir del análisis de un proyecto llevado a cabo en Granada, pretendemos reflexionar sobre cómo toma forma el codesarrollo en las sociedades receptoras, cuál es el papel de los y las migrantes en estos procesos y cómo puede la Antropología aportar una visión compleja y crítica sobre el codesarrollo y la Educación para el Desarrollo.
Hellenistic-Roman Wine and Olive Oil Presses from the Knidian Territorium
Authors: Tuna Numan
Published: April 2021

This article is a comparative assessment of the wine and oil workshop installations documented in the course of a field-survey carried out in the Knidian territorium, as compared to similar examples from the Eastern Mediterranean, with a special emphasis on press beds.In situ findings, which are related to workshops located in the archaeological sites of Burgaz (Palaia Knidos) and Yağtaşı-Devtaşı, as well as finds collected during further field work, have led us to reassess our knowledge of the Knidian wine and oil extraction technologies. It seems that the most common technology used in the Hellenistic period workshops is that of the lever and weight presses. The eleven Knidian press beds which have been inventoried are of two standard types, with specific features each. In concordance with the examples repertoried in Cilicia and Caria, the larger size of the Knidian press beds was probably due to the necessity of satisfying the needs of a regional rather than domestic market.The majority of the repertoried installations are to be found on the Datça plain which contains the most fertile arable lands of the whole Knidian territorium. Yet, we need to obtain more information concerning the agricultural technology used in sub-regions which, assumedly, were submitted to different environmental conditions. In fact, the results of our surveys provide only limited knowledge concerning the wine and oil production of the region and subsequent field surveys in sub-regions of the Knidian territory where, in antiquity, the arable lands were terraced, are needed to be carried out in order to reach more substantial conclusions.
Preliminary Report on the Seventh Season of the Konya Ereğli, Karapınar, Halkapınar and Emirgazi Survey Project (KEYAR) 2019
Authors: Maner Çiğdem
Published: April 2021

The Konya Ereğli Survey Project (KEYAR) started in 2013 with the aim to systematically survey the southeastern provinces of the Konya plain, which are Ereğli, Karapınar, Emirgazi and Halkapınar with a focus on Bronze and Iron Age settlements, structures and monuments. Between 2013-2018 the districts of Ereğli, Halkapınar, Emirgazi had been systematically surveyed, along with parts of Karapınar (Maner, 2017; 2019).1 In total seventy-six settlements, two tumuli and one cave have been identified, systematically surveyed and investigated (Fig. 1). The 2019 field season of KEYAR took place between 16-29 May 2019. In the past field seasons, it was not really possible to take drone images of the surveyed sites, mainly due to climatic reasons such as strong wind, clouds, rain and alas broken drones. Hence one of the major tasks of this season was to go back to previously surveyed sites and complete the missing drone images. The survey was conducted during the second half of May, which turned out to be not an ideal season for surveying. Due to heavy rainfall in the previous months, wild vegetation covered the ground and the archaeological sites, which made the designation of shards very difficult.
Tunceli Iron Age and Hellenistic Survey - 2018
Authors: Erdoğan Serkan , Sezgin Kudret
Published: April 2021

Carried out in the province of Tunceli since 2016, the ‘Tunceli Iron Age and Hellenistic Survey’ project is aimed at the discovery of new settlements and acquisition of new data mainly regarding known archaeological remains that have not yet been researched thoroughly. During the final observation and documentation of the survey project’s 2018 season, many new archaeological settlements with elements dating from the Early Bronze Age to the Middle Ages were identified in the Tunceli region. The aforementioned settlements consist of the Köteriç (Güneyharman) Settlement, the İndere Valley settlements, the Obrukbaşı (Lemk) Fortress, the Obrukbaşı (Lemk) Village Kilise Settlement, and the Yılanlı Fortress. In addition, certain previously undescribed characteristics of the Mazgirt/Kaleköy Fortress, Til-Kale and Göktepe/Konaktepe Mounds will be discussed in this paper. Another goal of this paper is to describe a sample house located in the Yaşaroğlu (Koman) village, in the Mazgirt district which reflects the residential architectural tradition of the region.
Fouilles de sauvetage sur la nécropole antique de Hırbe Helale (Mardin, Turquie) : rapport préliminaire sur les fouilles de 2018
Authors: Labedan-Kodaş Charlotte
Published: April 2021

La construction de l’université de Mardin Artuklu, débutée en 2007, est à l’origine de la découverte de plusieurs sites archéologiques d’intérêt. L’un d’eux, mis au jour près du parking de la faculté d’Art, révèle une période d’occupation s’étendant du Paléolithique à la période artukide. Les niveaux principalement mis en évidence lors des fouilles concernent une nécropole romaine antique et byzantine. En 2018, les fouilles ont permis d’y dégager 22 sépultures à ciste et 2 sépultures en fosse, soit environ 70 sujets adultes et enfants. Leur analyse contribuera à une meilleure connaissance des pratiques funéraires romaines dans l’Anatolie du sud-est, près de la frontière orientale de l’Empire romain.
Simulation and Optimization of C60-Based Organic Light-Emitting Diodes
Authors: Wang Shuo
Published: April 2021

In this work we present a detailed analysis of the current-voltage variance from tris(8-hydroxyquinoline)aluminum (Alq3) based organic light emitting diodes using general-purpose photovoltaic device model (GPVDM) software as a function of: the choice of C60, the thickness of emission layer and hole-transport layer. The electrical and optical parameters of all layers were extracted from the material directory available in GPVDM. The calculations fully consider dispersion in glass substrate, indium tin oxide anode, the organic layers as well as the dispersion in the metal cathode. As expected, applied voltage was strongly dependent on the thickness of the function layer inside the devices. Finally, guidelines for designing devices with optimum turn-on voltage and thickness are presented.
Synthesis of Alloyed Au-Ag Nanospheres with Tunable Compositions and SERS Enhancement Effects
Authors: Xu Bi Jie , Jiang Ming Yong , Chen Xiang Ning , Zhao Feng , Du Shu Han , Yi Hui
Published: April 2021

Surface-enhanced Raman scattering (SERS) has unique properties including highsensitivity, simple operation and non-destructiveness in trace detection; and the substrate will cast adirect impact upon the SERS signal. An everlasting topic has been focused on the preparation ofSERS substrates with controllable morphologies and hotspots. Herein, we reported a SERS substratewith alloyed Au-Ag nanospheres prepared via a reduction method of two-step seed growth method inliquid phase. TEM, SEM, Raman and UV-vis characterization have been employed to investigatemicro-morphology, composition, and SERS effects. Moreover, a quantitative detection model isestablished, and the R2 of fitting reaches as high as 0.982. Finally, the effect of different nAu/nAg molarratios on the SERS effect is investigated, with results showing that Raman enhancement has a goodrise at the very first beginning, but a drop later appears along with the decreasing nAu/nAg. The limit ofdetection (LOD) of R6G on Au-Ag nanosphere substrates has an initial increase, and a decreasefollows with the decreasing nAu/nAg ratios; the mechanism is also fully investigated. The preparationof particle-sized controllable Au-Ag nanomaterials helps provide a new highly enhanced SERSsubstrate.
Molecular Dynamics Simulation Study of the Effect of Ni, Fe, Cu on Cryolite Molten Salt System 78% Na3AlF6-9.5%AlF3-5.0%CaF2-7.5%-Al2O3
Authors: He Han Bing , Wang Yu Si , Luo Ze Xiang , Zeng Jing
Published: April 2021

The effect of different additives Ni, Fe, Cu on the structure and properties of electrolyte system 78% Na3AlF6- -9.5%AlF3-5.0%CaF2-7.5%Al2O3 at 1200K and 1.01Mpa was studied by molecular dynamics method. The radial distribution function, coordination number, diffusion coefficient, conductivity, and viscosity of the system were discussed in detail. The results demonstrated that the order of the self-diffusion coefficient of ions in the electrolyte system is: Na+ > F- > O2- > Ca2+ >Al3+. The addition of Ni and Fe connected the free aluminum composite ion groups in the system through fluorine bridges, which enhanced the interaction between Al3+ and Al3+. The addition of Cu weakened the interaction between Al3 + and Al3+ and the F-. The interaction between Al3+ and Na+, [AlF7]4- ionic groups might appeared in the melt system. After adding NiO, Fe2O3, and Cu, the electrical conductivity of the system increased, and the viscosity decreased. The research work revealed the influence of Ni, Fe, Cu on the ion existence form, mobility, inter-ion interaction and diffusion mechanism of cryolite molten salt system, which has important guiding significance for aluminum electrolysis production.
Effect of Annealing Temperature on the Microstructure of 2195 Al-Li Alloy Sheet
Authors: Feng Bo , Xiong Bai Qing
Published: April 2021

The annealing temperature is a key parameter for the mechanical properties and microstructure control of the 2195 Al-Li alloy sheet in the annealing process. In the present study, the effect of annealing temperature on the microstructure of 2195 Al-Li alloy sheet was investigated using a general mechanical testing machine, scanning electron microscope (SEM), transmission electron microscope (TEM), and backscattered electron microscope (EBSD). It was found that the optimized annealing temperature for 2195Al-Li alloy sheet of H112 state is 400°C, the alloy sheet shows the satisfactory mechanical properties. In addition, with the increase of annealing temperature, the δ' phase, the θ' phase and the T1 phase are formed in the alloy sheet, which leads to the strength of the alloy increase. Furthermore, the annealing temperature obviously affect the texture component and intensity during annealing treatment process.
DFT and HAADF-STEM Investigations of the Zn Effects on β″ Phase Structure in a Zn Added Al-Mg-Si-Cu Alloy
Authors: Yu Rui , Zhang Yong An
Published: April 2021

First-principles calculations were conducted to investigate the effects of Zn on the structure of β″ phase. The effects of Cu, which was often added in the alloy, were also taken into consideration. Firstly, single Zn or Cu atom was doped on different sites of the β″ phase. Then the formation enthalpies and lattice constants of doped β″ phases were calculated. The results showed that it was more energetically favorable for single Zn or Cu atom to occupy Si3/Al sites than other sites. Furthermore, different quantities of Zn or Cu atoms were doped on Si3/Al sites. With the amounts of doping atoms increasing, the formation enthalpies of β″ phases doped by Zn were lower than which doped by Cu, indicating that it was more preferential for Zn to enter the β″ phase when Zn content was higher than Cu. Additionally, the doping of Zn could reduce the formation enthalpies of the β″ phase, which promoted the formation of the β″ phases. As a result, the aging hardening response of the alloy was improved. High angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) characterization was also conducted on a peak-aging Zn added Al-Mg-Si-Cu alloy. The HAADF-STEM image of β″ phase showed that the occupancies of Zn atoms were just on the Si3/Al sites and substituted all the Al atoms, which was consistent with the results of first-principles calculations.