bluuebunny/crossref_metadata_2025 huggingface dataset:
Overcoming barriers to enable convergence research by integrating ecological and climate sciences: The NCAR-NEON system Version 1
Authors: Lombardozzi Danica L. , Wieder William R. , Sobhani Negin , Bonan Gordon B. , Durden David , Lenz Dawn , SanClements Michael , Weintraub-Leff Samantha , Ayres Edward , Florian Christopher R. , Dahlin Kyla , Kumar Sanjiv , Swann Abigail L. S. , Zarakas Claire , Vardeman Charles , Pascucci Valerio
Published: April 2023

Abstract. Global change research demands a convergence among academic disciplines to understand complex changes in Earth system function. Limitations related to data usability and computing infrastructure, however, present barriers to effective use of the research tools needed for this cross-disciplinary collaboration. To address these barriers, we created a computational platform that pairs meteorological data and site-level ecosystem characterizations from the National Ecological Observatory Network (NEON) with the Community Terrestrial System Model (CTSM) that is developed with university partners at the National Center for Atmospheric Research (NCAR). This NCAR-NEON system features a simplified user interface that facilitates access to and use of NEON observations and NCAR models. We present preliminary results that compare observed NEON fluxes with CTSM simulations and describe how the collaboration between NCAR and NEON that can be used by the global change research community improves both the data and model. Beyond datasets and computing, the NCAR-NEON system includes tutorials and visualization tools that facilitate interaction with observational and model datasets and further enable opportunities for teaching and research. By expanding access to data, models, and computing, cyberinfrastructure tools like the NCAR-NEON system will accelerate integration across ecology and climate science disciplines to advance understanding in Earth system science and global change.
F-region drift current distribution by X wave ionospheric heating
Authors: Li Yong , Li Hui , Wu Jian , Lv Xingbao , Yuan Chengxun , Li Ce , Zhou Zhongxiang
Published: April 2023

Abstract. We present a theoretical and numerical study of drift current model in the ionosphere by incorporating the ohmic heating model and the magnetohydrodynamic (MHD) momentum equation. Based on these equations, the ionospheric electron temperature and drift current are investigated. The results indicate that the maximum change of electron temperature ΔTe is about 570 K, and the ratio is ΔTe / Te ~48 %. The maximum drift current density is 8 × 10−10 A ⋅ m−2, and its surface integral is 5.76 A. Diamagnetic drift current is the main form of current. The low collision frequency between charged particles and neutral particles has little effect on the current, and the collision frequency of electrons and ions is independent of the drift current. The current density profile is a flow ring. We present the effective conductivity as a function of the angle between the geomagnetic field and the radio wave; the model explains why the radiation efficiency in Kotik's experiment was strongest when the X wave is heating along the magnetic dip angle.
Evaluation of Aeris MIRA, Picarro CRDS G2307, and DNPH-based sampling for long-term formaldehyde monitoring efforts
Authors: Mouat Asher P. , Siegel Zelda A. , Kaiser Jennifer
Published: April 2023

Abstract. Current formaldehyde measurement networks rely on the TO-11A offline chemical derivatization technique, which can be resource intensive and limited in temporal resolution. In this work, we evaluate the field performance of three new commercial instruments for continuous in-situ formaldehyde monitoring: the Picarro cavity ringdown spectroscopy (CRDS) G2307 gas concentration analyzer and Aeris Technologies’ mid-infrared absorption (MIRA) Pico and Ultra gas analyzers. All instruments require regular drift correction, with baseline drifts over a 1-week period of ambient sampling of 1 ppb, 4 ppb, and 20 ppb for the G2307, Ultra, and Pico, respectively. Baseline drifts are easily corrected with frequent instrument zeroing using DNPH scrubbers, while Drierite, molecular sieves, and heated hopcalite fail to remove all incoming HCHO. Drift-corrected 3σ limits of detection (LOD) determined from regular instrument zeroing were relatively comparable at 0.055 ppb (Picarro G2307), 0.065 ppb (Aeris Ultra), and 0.08 ppb (Aeris Pico) for a 20 min integration time. We find that after correcting for a 30–40 % bias in the Pico measurements, all instruments agree within 5 % and are well correlated with each other (all R2≥0.70). Picarro G2307 HCHO observations are more than 50 % higher than co-located TO-11A HCHO measurements (R2 = 0.92, slope = 1.47, int = 1 ppb HCHO), which is in contrast to previous comparisons where measurements were biased low by 1–2 ppb. We attribute this discrepancy to the previous versions of the spectral fitting algorithm as well as the zeroing method. The temperature stabilization upgrade of the Ultra offers improved baseline stability over the previously described Pico version, reducing the maximum drift rate by a factor of 13 and improves precision of a 10 min average by 13 ppt. Using a 6-month deployment period, we demonstrate that all instruments provide a reliable measurement of ambient HCHO concentrations in an urban environment and, when compared with previous observations, find that midday summertime HCHO concentrations have reduced by approximately 50 % in the last two decades.
Representation of atmosphere induced heterogeneity in land – atmosphere interactions in E3SM-MMFv2
Authors: Lee Jungmin , Hannah Walter M. , Bader David C.
Published: April 2023

Abstract. In E3SM-MMF, where parameterizations of convection and turbulence are replaced by 2-D CRM, there are multiple options to represent land-atmosphere interactions. Here, we propose 3 different coupling strategies: 1) coupling of a single land surface model to the global grid (MMF), 2) coupling a single land instance directly to the embedded CRM (SFLX2CRM), and 3) coupling multiple land instances to each column of the CRM grid (MAML). In MAML (Multi-Atmosphere Multi-Land) framework, a land model is coupled to CRM at CRM grid scale by coupling an individual copy of a land model to each CRM grid. Therefore, we can represent intra-CRM heterogeneity in the land-atmosphere interaction processes. 5-year global simulations are run using these 3 coupling strategies and we find that there are little to no difference whether a land model is coupled to CRM or a global atmosphere. In MAML, spatial heterogeneity within CRM induces stronger turbulence, which leads to the changes in soil moisture, surface heat fluxes and precipitation. However, the differences of MAML from the other two cases are rather weak, suggesting that the impact of using MAML does not justify the increase in cost.
Description and performance of the CARMA sectional aerosol microphysical model in CESM2
Authors: Tilmes Simone , Mills Michael J. , Zhu Yunqian , Bardeen Charles G. , Vitt Francis , Yu Pengfei , Fillmore David , Liu Xiaohong , Toon Brian , Deshler Terry
Published: April 2023

Abstract. We implemented the Community Aerosol and Radiation Model for Atmospheres (CARMA) in both the high and low-top model versions of the Community Earth System Model Version 2 (CESM2). CARMA is a sectional microphysical model, which we use for aerosol in both the troposphere and stratosphere. CARMA is fully coupled to chemistry, clouds, radiation, and transport routines in CESM2. This development enables the comparison of simulations with a sectional (CARMA) and a modal (MAM4) aerosol microphysical model in the same modeling framework. The new implementation of CARMA has been adopted from previous work with some additions that align with the current CESM2 MAM4 implementation. The main updates include an interactive secondary organic aerosol description in CARMA using the volatility basis set (VBS) approach, updated wet removal, and the use of transient emissions of aerosols and trace gases. In addition, we implemented an alternative aerosol nucleation scheme in CARMA, which is also used in MAM4. Detailed comparisons of stratospheric aerosol properties after the Mt Pinatubo eruption reveal the importance of prescribing sulfur injections in a larger region rather than in a single column to better represent the observed evolution of aerosols. Both CARMA and MAM4 in CESM2 are able to represent stratospheric and tropospheric aerosol properties reasonably well compared to observations. Several differences in the performance of the two aerosol models show, in general, an improved representation of aerosols using the sectional aerosol model in CESM2. These include a better representation of the aerosol size distribution after the Mt Pinatubo volcanic eruption in CARMA compared to MAM4. MAM4 produces on average smaller aerosols and less removal than CARMA, which results in a larger total mass. Both CARMA and MAM4 reproduce stratospheric Aerosol Optical Depth (AOD) within the errorbar of the observations between 2001 and 2020, except for recent larger volcanic eruptions that are overestimated by both model configurations. The CARMA background surface area density and aerosol size distribution in the stratosphere and troposphere compare well to observations, with some underestimation of the Aitken-mode size range. MAM4 shows shortcomings in reproducing coarse-mode aerosol distributions in the stratosphere and troposphere. This work outlines additional development needs for CESM2 CARMA to improve the model compared to observations in both the troposphere and stratosphere.
Approximate sequential Bayesian filtering to estimate 222Rn emanation from 226Ra sources using spectral time series
Authors: Mertes Florian , Röttger Stefan , Röttger Annette
Published: April 2023

Abstract. A new approach to assess the emanation of 222Rn from
226Ra sources based on γ-ray spectrometric measurements is
presented. While previous methods have resorted to steady-state treatment of
the system, the method presented incorporates well-known radioactive decay
kinetics into the inference procedure through the formulation of a
theoretically motivated system model. The validity of the 222Rn
emanation estimate is thereby extended to regimes of changing source
behavior, potentially enabling the development of source surveillance
systems in the future. The inference algorithms are based on approximate
recursive Bayesian estimation in a switching linear dynamical system,
allowing regimes of changing emanation to be identified from the spectral
time series while providing reasonable filtering and smoothing performance
in steady-state regimes. The derived method is applied to an empirical
γ-ray spectrometric time series obtained over 85 d and is able to
provide a time series of emanation estimates consistent with the physics of
the emanation process.
The joint application of metaheuristic algorithm and Bayesian Statistics approach for uncertainty and stability assessment of nonlinear Magnetotelluric data
Authors: Mukesh Mukesh , Sarkar Kuldeep , Singh Upendra K.
Published: April 2023

Abstract. In this paper, we have developed the Matlab code for a weighted hybrid of particle swarm optimization (PSO) and gravitational search algorithm (GSA) known as wPSOGSA, GSA, and PSO algorithms to interpret one-dimensional magnetotelluric (MT) data for some corrupted and non-corrupted synthetic data, as well as two examples of MT field data over different geological terrains: (i) geothermal rich area, Island of Milos, Greece, and (ii) Southern Scotland due to the occurrence of a significantly high electrical conductivity anomaly under crust and upper mantle extending from the Midland Valley across the Southern Uplands into northern England. Even though the fact that many models provide a good fit in a large predefined search space, specific models do not fit well. As a result, we used a Bayesian statistical technique to construct and assess the posterior probability density function (PDF) rather than picking the global model based on the lowest misfit error. This is proceeded by 68.27 % confidence interval for selecting a region where PDF is more prevalent to estimate the mean model which is more accurate and close to the true model. For illustration, correlation matrices show a significant relationship among layer parameters. The findings indicate, the wPSOGSA is less sensitive to model parameters and produces well, more stable and reliable results with the least uncertainty in the model that is compatible with existing borehole samples. Furthermore, the present methods resolve two additional geologically significant layers, one highly conductive (less than 1.0 Ωm) and another resistive (300.0 Ωm) over the Island of Milos, Greece, characterized by alluvium and volcanic deposits, respectively, as corroborated by borehole stratigraphy.
Arctic sea ice data assimilation combining an ensemble Kalman filter with a novel Lagrangian sea ice model for the winter 2019–2020
Authors: Cheng Sukun , Chen Yumeng , Aydoğdu Ali , Bertino Laurent , Carrassi Alberto , Rampal Pierre , Jones Christopher K. R. T.
Published: April 2023

Abstract. Advanced data assimilation (DA) methods, widely used in geophysical and climate studies to merge observations with numerical models, can improve state estimates and consequent forecasts. We interface the deterministic ensemble Kalman filter (DEnKF) to the Lagrangian neXt generation Sea Ice Model, neXtSIM. The ensemble is generated by perturbing the atmospheric and oceanic forcing throughout the simulations and randomly initialized ice cohesion. Our ensemble–DA system assimilates sea ice concentration (SIC) from the Ocean and Sea Ice Satellite Application Facility (OSI-SAF) and sea ice thickness (SIT) from the merged CryoSat-2 and SMOS datasets (CS2SMOS). Because neXtSIM is computationally solved on a time-dependent evolving mesh, it is a challenging application for ensemble–DA. As a solution, we perform the DEnKF analysis on a fixed and regular reference mesh, on which model variables are interpolated before the DA and then back to each member's mesh after the DA. We evaluate the impact of assimilating different types of sea ice observations on the model's forecast skills of the Arctic sea ice by comparing satellite observations and a free-run ensemble in an Arctic winter period, 2019–2020. Significant improvements in modeled SIT indicate the importance of assimilating weekly CS2SMOS SIT, while the improvements of SIC and ice extent are moderate but benefit from daily ingestion of the OSI-SAF SIC. For most of the winter, the correlation between SIT and SIC is weaker, which results in little cross-inference between the two variables in the assimilation step. Overall, the ensemble–DA system based on the stand-alone sea ice model demonstrates the feasibility of winter Arctic sea ice prediction with good computational efficiency. These results open the path toward operational implementation and the extension to multi-year assimilation.
Funcionalidad, límites y contradicciones de las políticas activas de empleo: el caso de Suecia en el siglo XX
Authors: Del Rosal Mario
Published: April 2023

Este trabajo estudia la política activa de empleo aplicada en Suecia en el tercer cuarto del siglo XX. Concretamente, analizamos su papel central en la estrategia de política económica general desarrollada por la socialdemocracia en este país bajo el marco del Modelo Rehn-Meidner, núcleo esencial del Modelo Sueco. Por un lado, constatamos que esta estrategia fue imprescindible para evitar que la política salarial solidaria, pilar central del proyecto económico socialdemócrata, generara desempleo masivo en determinados sectores y regiones, aunque es dudoso que pudieran haber sido suficientes sin el complemento del empleo público masivo. Por otra parte, comprobamos que esta estrategia tuvo graves consecuencias para ciertos sectores de la población trabajadora: en algunos casos, por verse empujados a una migración interna forzosa, y, en otros, por verse forzados a cambiar de industria y trabajo. Todo ello, en aras del fomento de la competitividad del capital sueco, verdadero beneficiario último del modelo.
El discurso político de la izquierda colombiana sobre las dificultades de su acceso al poder gubernamental (1991-2021)
Authors: Ríos Sierra Jerónimo
Published: April 2023

Este trabajo analiza el discurso político producido por una parte de las elites que representan a la izquierda política colombiana en relación con las dificultades que han lastrado al progresismo en el acceso al poder gubernamental. A partir de nueve entrevistas en profundidad con personalidades como Ernesto Samper, Angelino Garzón, Antonio Navarro Wolff, Clara López, Piedad Córdoba o “Timochenko”, se identifican y problematizan tres factores en concreto, que mayormente son compartidos por todos los entrevistados: 1) la debilidad ontológica del promisorio orden constitucional de 1991; 2) el alcance y afectación del conflicto armado y, finalmente, 3) aspectos particulares del sistema político colombiano como el arraigo de las redes clientelares o la profunda cultura política conservadora, entre otros. A pesar de lo anterior, se reconoce que el Acuerdo de Paz firmado en 2016 con las FARC-EP libera un espacio para la izquierda que parecería explicar buena parte de la transformación experimentada en los últimos años y que hace que el sistema político colombiano disponga, de forma cada vez más clara, de una izquierda erigida como alternativa gubernamental.
El oleoturismo como instrumento de diversificación productiva de las cooperativas olivícolas
Authors: Casado-Montilla Jairo , Pulido-Fernández Juan Ignacio , Carrillo-Hidalgo Isabel , Durán-Román José Luis
Published: April 2023

Los motivos que llevan a las empresas a diversificar su negocio, introduciendo una nueva línea, pueden ser determinantes para el éxito de su propuesta, evidenciando éstos los intereses que poseen las empresas respecto a esa diversificación, ya que implica el desarrollo de un nuevo producto y enfrentarse a un nuevo mercado. En este trabajo, se analizan las razones que hay detrás de la puesta en marcha de un proyecto de oleoturismo como estrategia de diversificación productiva de las cooperativas olivícolas, así como la manera en que éstas han hecho frente a este cambio. Igualmente, se ha tratado la Responsabilidad Social Corporativa y la gestión de los medios en la red para el posicionamiento de la oferta oleoturística. Para ello, se ha realizado una encuesta a 33 de las cooperativas olivícolas más avanzadas actualmente en el desarrollo del oleoturismo. El resultado evidencia que el oleoturismo está aún en una fase inicial y requiere de una mayor implicación por parte de las cooperativas oferentes.
E. Laclau y H. Bergson: la experiencia cómica como elemento movilizador en la construcción de un pueblo
Authors: Gómez Villar Antonio
Published: April 2023

A partir de las reflexiones de H. Bergson sobre la risa, nos preguntamos qué podría tener de específico el humor en la lógica populista de E. Laclau; cuáles son los vínculos afectivos que se construyen entre el líder y el pueblo a través de las estrategias cómicas; y en qué medida el humor podría ser utilizado como elemento movilizador para la construcción de un pueblo. Más que como atributos de una agencia política independiente, nos interesa pensar el humor como atributo de la representación iconográfica en el sentido que le otorga E. Laclau. Si para H. Bergson la risa tiene una función social correctora, proponemos pensar la experiencia cómica desde una función intensificadora en la construcción de identidades colectivas.
Ricardo Espinoza Lolas y el concepto de NosOtros. Del rasgo definitorio de la filosofía iberoamericana a la subjetividad política global
Authors: Sgarro Tommaso
Published: April 2023

Desde la segunda mitad del siglo XX, el concepto de “nosotros” ha pasado a caracterizar la reflexión sobre la identidad, la cultura y la filosofía iberoamericanas. La reconstrucción de la trayectoria intelectual que ha hecho madurar el análisis de este concepto en la obra de Ricardo Espinoza Lolas nos muestra cómo esta categoría del pensamiento sudamericano, a pesar de sus estrechos vínculos con la historia del continente, puede universalizarse y, por tanto, utilizarse como paradigma filosófico a nivel mundial. A través de la comparación y profundización de las interpretaciones del lema “nosotros” dadas por Juan Carlos Scannone y Arturo Andrés Roig, y la ofrecida por Espinoza, emerge el alcance de una propuesta que, por un lado, muestra el valor histórico-filosófico del pensamiento iberoamericano y su papel dentro de una historia de la filosofía ya no entendida en clave meramente eurocéntrica e ideológica, sino en su desarrollo real y material; y por otro, la funcionalidad de un concepto que se convierte en dispositivo de desactivación del actual orden global capitalista de las tesis de espinozistas
Synod w tradycji luterańskiej
Authors: Sojka Jerzy
Published: April 2023

The article presents the experience of synodal work from the Lutheran perspective. For this purpose, it presents the most important global synodal body of Lutheranism – the General Assemblies of the Lutheran World Federation, as well as the most important body of this type in the Polish context – the Synod of the Evangelical Church of Augsburg Confession in Poland. Then, the powers of both these bodies are analyzed to show that they are not limited only to technical and organizational issues, but also extend to the area of defining the truths of faith. In the next step, the search for theological premises for synodal work was undertaken, focusing on the concept of the universal priesthood of all believers and the principles of the Lutheran hermeneutics of Holy Scripture. Finally, a specific example of a discussion on confirmation in the Polish Evangelical Church of Augsburg Confession shows how the Lutheran synodal process can look like in practice. Finally, some indispensable elements for the success of the synodal process have been identified.
Służba kobiet w liturgii – Tradycja Kościoła a współczesna praktyka pastoralna. Stan badań na rok 2020 przed ogłoszeniem motu proprio „Spiritus Domini”
Authors: Akonom Jakub
Published: April 2023

Liturgical ministry, which has its roots in the times before Jesus Christ’s birth, has been exercised by boys and young men for thousands years. The 20th century liturgical reforms have also opened doors to girls’ and women’s liturgical ministry. The aim of the article is to present the changes in celebration throughout history and to clarify the range of possibilities and general competences of women and girls during the celebration. The article presents state of the research in 2020 and does not include the issues raised in the motu proprio Spiritus Domini. The article is divided into four chronological parts. The first one deals with the archetypes of minsters from the Old Testament. The second one characterizes the evangelical context of the liturgical ministry. The third part describes the development of the altar boys’ service over the centuries. The fourth part concerns on the times after the Second Vatican Council, therefore on the actual liturgical renewal in the Church all over the world and in Poland. The text itself is based on the Holy Bible, the Church’s Magisterium’s documents and source literature. The thesis analyzes the above texts and is of analytical and theoretical nature. The result shows specific possibilities of women’s involvement in liturgical ministry structures. It also names the roles they undertake in liturgical groups during celebrations. Based on the available sources and historical circumstances it should be enabled for women and girls to engage in ministry that includes reading and singing, whereas the traditional liturgical ministry, apart from bringing the altar gifts by the laity, should be reserved for men and boys unless the diocesan bishop decides otherwise.
Udział łódzkiego harcerstwa w plebiscycie i powstaniach śląskich 1920-1921
Authors: Dziewulski Piotr
Published: April 2023

The outbreak of the first Silesian Uprising in 1919 was a spontaneous phenomenon that got out of the control of then formal decision-makers on the Polish side, at the same time it surprised the German side. Scouts from the entire independent Republic of Poland – including Lodz, participated in subsequent events in Upper Silesia. The author based his considerations on articles from the scouting press of the time, a few internal documents of the Polish Scouting and Guiding Association (ZHP) and memories. As a result of the source analysis, it was able to present a picture of the strong support provided by the Lodz scouting in the Silesian uprisings and the plebiscite in years 1920–1921. The activities of the scout instructors delegated to Silesia, noted in the memories, show that their work was distant from the mission of the ZHP and was purely propaganda.
Eleições municipais: condicionantes da reeleição dos prefeitos nos municípios paraibanos.
Authors:   , Felipe Santos Queiroz do Ó William
Published: April 2023

Este trabalho tem por objetivo analisar os fatores que contribuem para o sucesso eleitoral de governantes que pleitearam a reeleição consecutiva nos municípios paraibanos no pleito de 2016. Dados como escolaridade, apoio ao Governo Estadual, Gestão Fiscal e Desenvolvimento Municipal serviram como base de análise. Utilizando-se da metodologia estatística descritiva para mensuração dos dados. Os resultados alcançados apontam que grande parte dos Prefeitos indica a política como sendo sua profissão, Prefeitos que apoiam o Governador do Estado da Paraíba são potencialmente conduzidos a disputa eleitoral pela Reeleição, a maioria dos Municípios de grande porte populacional apresenta médias baixas no que tange a Gestão Fiscal, todos os municípios analisados possuem desenvolvimento regular e moderado independentemente de terem atingido a reeleição ou não. Pode-se dizer que no processo de Reeleição as variáveis de apoio ao Governador, de Gestão Fiscal e Desenvolvimento Municipal interferem no Processo de Reeleição, mas não são determinantes para o resultado final.
Homicídios no Cariri Ocidental da Paraíba: análise do diagnóstico dos homicídios nas cidades de Sumé, congo e Amparo no período de 2007 à 2017.
Authors:   , Gomes de Farias Manuela
Published: April 2023

O presente artigo aborda uma analise sobre os inquéritos policias referentes aos homicídios na Comarca da delegacia de Sumé que abrange as cidades de Amparo, Congo e Sumé, que estão localizadas no Cariri Ocidental paraibano. O objetivo desse estudo foi identificar como esta sendo o andamento dos casos de homicídios que ocorreram nestas três cidades no período de dez anos (2007 – 2017), e assim correlacionar com os números que o site do DATA/SUS fornece. Para isso este trabalho partiu de uma revisão bibliográfica, unsdiagnósticos dos inquéritos policiais e o levantamento estatístico do número de inquéritos policiais referente aos casos de homicídios dessas cidades. O artigo contou também com uma pesquisa literária referente á violências, homicídios e inquéritos policiais, em sua metodologia tem uma analise documentais e estatísticas descritivas, para que possamos ter uma melhor visão de como se deu os casos analisados e qual a melhor forma de pesquisa para esses indicadores. Com tudo os dados nos mostrou uma defasagem nos dados do DATA/SUS durante os anos e uma desigualdade com os dados da delegacia.
Análise da economicidade do pregão presencial nos processos licitatórios no Município de Sumé entre 2015 e 2019.
Authors:   , da Silva Sousa Aglair
Published: April 2023

O presente trabalho tem como objetivo principal, demonstrar a participação da modalidade pregão presencial nos trâmites dos procedimentos licitatórios relacionados à Administração Pública de Sumé/PB, além de mensurar a economicidade que esta modalidade proporcionou para o município no período entre 2015-2019. Como objetivos específicos, o estudo aspirou expor as conotações sobre: Administração Pública; licitação, princípios e modalidades; gestão e sistemas de compras; pregão, origem e tipos; pregão presencial: vantagens e desvantagens. Em termos metodológicos, a pesquisa classificou-se como bibliográfico e documental, de natureza quali-quantitativa, configurando-se como um estudo de caso. Como resultado da averiguação, ficou demonstrado que no município de Sumé/PB, durante o período avaliado, o pregão presencial foi a modalidade licitatória com maior emprego. Além disso, o pregão presencial ratificou-se na maioria dos processos analisados como fomentador de economia para a prefeitura, uma vez que, os valores de compra efetivados foram majoritariamente menores quando confrontados com a média de preço de mercado apontada como referência pelo Tribunal de Contas da União (TCU).
Electrical Conductivity Identification of Waste Particles Using Eddy-Current
Authors: Nafia Dahmane , Abdelghani Ayad , Salah-Eddine Bendimerad , Ahmed Chaiba Sid , Abdelmajid Rais
Published: April 2023

In this article, we propose a new approach based on the non-destructive method by eddy currents (EC) to identify the conductivity of millimeter materials. Our work is based on the simulation of different wastes which are chosen in rectangular form. The calculation of the normalized
impedance of the sensor on the particles of the waste allowed us to successfully identify the conductivity of the materials. This impedance change with the conductivity of each material can be used in the characterization of the waste materials. An extrapolation based on the linear programming
method (LPM) us to estimate the frequency and next to identify the conductivity of new materials introduced in the test. The obtained results of this characterization by LPM are found to be consistent and satisfactory.
Performance of Dual-fuel (DF) Engine Powered with the Producer Gas Derived From Sugar Cane Bagasse and Diesel Injection
Authors: Kumar Hemanth K. J. , Gowda B. Sadashive , Jyothilakshmi R , Banapurmath N. R.
Published: April 2023

Renewable and sustainable fuel usage in diesel engines ensures energy security and overseas exchange savings besides conveying both socioeconomic and environmental concerns. This research presents experimental work that has been done on single-cylinder, 4-stroke, diesel engine of direct
injection run in DF mode using PG derived from sugar cane bagasse renewable and sustainable fuels. A 45° gas venture is designed and developed to provide a stoichiometric mixture of gas and air entry into the intake manifold of the DF engine during suction stroke. A compressed mixture
of air and gas is ignited by injecting diesel into the engine cylinder at 205 bar pressure and at different timings of injection. The effect of timing of injection on the DF engine performance is studied by varying it from 23 to 31obtdc in steps of 4obtdc. Experimental investigation showed
that 27oBTC resulted in improved BTE with reduced emissions of hydrocarbon, smoke, and CO while NOx, peak pressure increased. It is noticed that the operation of producer gas lowers the power derating by 20% and the DF engine could run up to 80% load with increased nitric oxide (NOx) emissions.
The developed DF engine worked satisfactorily with acceptable performance and emission norms and assisted in partially substituting the fossil diesel fuel with a substitution of 60-70% by the PG operation.
GenASiS Basics: Object-oriented utilitarian functionality for large-scale physics simulations
Authors: Budiardja Reuben D.
Published: April 2023

GenASiS Basics provides modern Fortran classes furnishing extensible object-oriented utilitarian functionality for large-scale physics simulations on distributed memory supercomputers. This functionality includes physical units and constants; display to the screen or standard output device; message passing; I/O to disk; and runtime parameter management and usage statistics. The latest version of this release includes major additions to its functionality: infrastructure facilitating the offloading of computational kernels to devices such as GPUs and the facilitation of direct communication between GPUs.

In this talk, I will start with the overarching motivation of this work, which is to harness the computational power of GPUs to perform astrophysical simulations. Then I will describe the high-level overview of GenASiS and the functionality afforded by GenASiS Basics. I will also describe how we use OpenMP in GenASiS Basics to create an infrastructure to seamlessly manage data movement and offload computational kernels to GPUs. I will also describe an example fluid dynamic application included in GenASiS Basics showing significant speedups when using GPUs via the above-mentioned infrastructure. Finally and most importantly, I will show how one can leverage the functionality provided by GenASiS Basics to program their physics application to run on clusters and supercomputers.
Actor-Critic Method for Solving High Dimensional Hamilton-Jacobi-Bellman type PDEs
Authors: Lu Jianfeng
Published: April 2023

In this talk, we will discuss numerical approach to solve high dimensional Hamilton-Jacobi-Bellman (HJB) type elliptic partial differential equations (PDEs). The HJB PDEs, reformulated as optimal control problems, are tackled by the actor-critic framework inspired by reinforcement learning, based on neural network parametrization of the value and control functions. Within the actor-critic framework, we employ a policy gradient approach to improve the control, while for the value function, we derive a variance reduced least-squares temporal difference method using stochastic calculus. We will also discuss convergence analysis for the actor-critic method, in particular the policy gradient method for solving stochastic optimal control. Joint work with Jiequn Han (Flatiron Institute) and Mo Zhou (Duke University).
Necm Sûresine Özgü Kelime ve Kalıpların Arap Dili Açısından Tahlili
Authors: Mızrak Hatice
Published: April 2023

İslam dünyasında öteden beri Kur’ân eksenli birçok çalışma yapılmıştır. Bu çalışmalar bazen fıkıh bazen inanç bazen de dil odaklı olmuştur. Dil odaklı yapılan çalışmalardan bazıları Kur’ân’ın tümünü bazıları ise belli sûreleri konu edinmiştir. Dil eksenli yaptığımız bu çalışmamızda hem anlam hem de sözel olarak mekkî sûrelerin özelliklerini barındıran Necm sûresi incelenmiştir. Necm sûresi özellikle nübüvvet, ahiret ve Allah’ın vahdaniyeti gibi konuları kapsamaktadır. Sûre yeminle başlamakta ardından da vahyin indiriliş şeklinden ve Hz. Muhammed’in Cebrâil ile olan diyaloğundan bahsetmekle devam etmektedir. Çalışmamızda Necm sûresine özgü kelimelerin Arap dili ve belâgatı açısından incelenmesi ve örnekler ışığında tüm yönleriyle ortaya konulması hedeflenmiştir. Bu hedef doğrultusunda yapılan çalışmamızda öncelikle Necm sûresi hakkında genel bilgiler verilmiş, ardından da sûreye özgü kelimeler derlenmiştir. Bu kelimeler hem semantik hem de etimolojik açıdan tahlil edilmiş ve kullanım şekillerine dair örnekler verilmiştir. Son olarak söz konusu kelimelerin belâğî yönlerine de gerekli yerlerde atıfta bulunulmuştur. Çalışma neticesinde Necm sûresine özgü birçok kelime ve kavramın olduğu ortaya çıkarılmış ve elde edilen bulgular sonuç kısmında açıklanmıştır.
Arap Dilinde Tenbîh Edatlarının İşlevleri ve Meâllere Yansıması
Authors: Yıldırım Muhammed Emin
Published: April 2023

Arap dilinde manayı ifade etmeye yardımcı birçok edat bulunmaktadır. Edatların özelliklerini, türlerini ve işlevlerini ortaya koymak amacıyla genel çalışmalar yapılmıştır. Son dönemlerde edatların belli bir türü ile ilgili akademik çalışmalar da yapılmaya başlanmıştır. Kur’an-ı Kerim’de de bir uyarı üslubu olarak çokça kullanılan tenbîh edatlarını ele alan müstakil Türkçe bir çalışmanın bulunmaması ve bunların meâllerde tam olarak yansıtılamaması sebebiyle akademiye katkı sunmak için çalışmamızda, Arap dilindeki tenbîh edatlarının tespiti ve ayetler çerçevesinde uyarı anlamının meâle tam olarak yansıtılması amaçlanmıştır. Tenbîh edatının bulunduğu cümle kurgulanırken daha düzgün ifade kullanmak mümkündür. Fakat edatı yansıtabilmek için şiirin tercümesi ve ayetlerin meâlinde bazen bu durum göz ardı edilmiştir. Araştırma sürecinde tenbîh edatları, Arapça klasik kaynaklar, ayetler çerçevesinde incelenmiş ve bulunduğu bazı ayetlerdeki anlamları da göz önünde tutulmuştur. Arap dilindeki klasik kaynakların ve ayetlerin incelenmesi neticesinde asıl tenbîh edatlarının üç tane olup “elâ”, “emâ” ve “hâ” olduğu, münâdası olmadığında “yâ” edatının da tenbîh anlamında olduğunun bazı âlimler tarafından kabul edildiği, Kur’an’da “emâ”nın kullanılmadığı, “yâ”nın tenbîh anlamında bulunmadığı görülmüştür. Mana olarak birbirine yakın olmakla birlikte kelâma uyarı, te’kit, tahakkuk gibi farklı anlamlar da katan bu edatların bilinmesi, Arap dilini daha iyi anlayabilme ve ayetlerin anlamını daha iyi ortaya koyabilme açısından gereklidir. Her kelâm veya ayette aynı anlamı katmamakta, bazı yerlerde sadece uyarı, bazılarında uyarı, te’kit veya tahakkuk, bazılarında da bunların birkaç tanesini katmaktadır. Türkçede uyarı edat/bağlaçları gibi bir edat türü bulunmamaktadır. Bu edatların çevirisinde bazen “işte”, bazen de “uyarı, dikkat, dikkat edin, bilin” gibi anlamların verilmesi uygundur.
Arnavut Halk Destanı ve Türkülerinde İstanbul
Authors: Rexhepi Abdulla , Hamiti Abdulla
Published: April 2023

İstanbul, Türkler ve Müslümanlar için önemli bir siyaset, kültür ve bilim merkezi olduğu gibi Arnavutlar için de özel bir öneme sahiptir. Arnavutların dünyasında İstanbul’un özel yeri Arnavut halk edebiyatında kendini göstermiş ve birçok edebi metinde İstanbul teması işlenmiştir. Arnavut edebiyatında İstanbul, Balkanlardaki Arnavutların siyasal ve sosyal koşullarının belirlendiği, Arnavutların kaderini düşünen “Baba Sultan”ın yaşadığı ve zaman zaman da aleyhlerine kararların alındığı bir “yer” olarak dile getirilmiştir. Arnavut Halk Edebiyatı, Arnavutların bu şehre karşı olumlu ya da olumsuz derin varoluşsal duygularını ortaya koymaktadır. Söz konusu metinlerde İstanbul, Osmanlı İmparatorluğu’nun başkenti olduğu gibi Arnavutlar için de kültür, eğitim, siyaset ve askeri merkezi olarak görülür. 1912 Balkan savaşı öncesinde Arnavutluk haricindeki diğer Balkan Devletleri Osmanlı Devleti’nden bağımsızlıklarını kazanmışlardı. Arnavutluk’un da Osmanlı İmparatorluğu’ndan 1912 Balkan Savaşı esnasında bağımsızlığını ilan ederek ayrılmasından sonra Arnavutlar için yavaş yavaş önemini kaybetmeye başlayan İstanbul’un yerini Paris, Viyana ve diğer batılı şehirler almıştır. Önce aydınlar sonra da halkın bir bölümü gözlerini İstanbul’dan batı şehirlerine çevirdiler. Bu makalenin amacı Arnavut halk edebiyatındaki İstanbul ile ilgili metinleri tespit ederek, İstanbul’un Arnavutlar arasındaki konumu ve halkının kolektif hafızasındaki varlığını analiz etmektir. Çalışmada Arnavut halk edebiyatında var olan örneklerle, İstanbul’un kültürel, politik ve sosyal olarak önemli bir merkez olduğu dile getirilmiştir. Aynı zamanda Arnavutların birçok unsurunun ve oryantal epistemilerinin İstanbul’daki ile aynı ekoller, merkezler ve fikir hareketlerinden oluştuğu görülmektedir. Bu makalede ayrıca Arnavut halk edebiyatında İstanbul şehrinin varlığını tespit ederek, böylece Arnavutların hafızasında kültürel ve sosyo-politik bir “merkez” olarak rolünü anlamayı ve açıklamayı çalıştık. Sonuç olarak, İstanbul şehrinin Arnavut halkı için ontolojik ve epistemolojik önemi hâlâ devam ettiği anlaşılmaktadır. Çalışmamızdaki araştırma metodu kütüphane tabanlı araştırmaya dayalıdır; çalışma metodu ise tanımlayıcı ve analitiktir. Yazılan kaynaklar haricinde, Kosova, Arnavutluk ve Türkiye’deki kütüphanelerde bulunabilen, Osmanlı alfabesindeki el yazması Arnavut şiirlerini de kullanılmıştır. Çünkü klasik Türk şiiri etkisindeki Arnavut şiirinin manzum şekillerini araştırmak için, bu şiirin Osmanlı harfleri ile yazılmış halinin gerekli olduğu kanaatindeyiz.
Fenología del hielo lacustre: una comparación entre imágenes TSX y Sentinel-1 usando análisis de datos de campo en una región marítima de la Antártida
Authors: Viel Jorge Antônio , Petsch Carina , Velho Luiz Felipe , Da Rosa Kátia Kellem
Published: April 2023

El monitoreo a lo largo del tiempo de la dinámica fenológica de congelamiento de las superficies de los lagos en áreas libres de hielo es relevante para comprender los impactos del calentamiento mundial y los eventos climáticos extremos en las regiones polares. Los objetivos de este trabajo son: (I) establecer valores de retrodispersión para los blancos agua superficial libre de hielo y recubierta por hielo en lagos –con el soporte de datos de campo– utilizando las imágenes TerraSar-X (TSX) y Sentinel 1A - EW (S-1), teniendo como estudio de caso la península Fildes, Antárctica Marítima; (II) evaluar la relación entre los datos de retrodispersión y los datos meteorológicos; (III) evaluar las potencialidades de TSX y de S-1para el mapeo de la fenología de los lagos. El procesamiento de las imágenes SAR fue realizado en el SNAP y los datos meteorológicos fueron obtenidos en la Base Eduardo Frei Montalva. Se obtuvo el umbral de retrodispersión de -32 dB a -21 dB para el agua libre de hielo en los lagos estudiados en la imagen TSX, y para la Sentinel-1 hubo una variación de -18 dB a -15 dB para el agua libre de hielo de los lagos. La imagen TSX es la más adecuada para el monitoreo de la fenología de los lagos por su resolución espacial, mientras la S-1 se limita a los lagos con más de 10.000 m2. Es necesario tener en cuenta las condiciones meteorológicas, especialmente el viento, las precipitaciones de nieve y los cambios de temperatura, que representan alteraciones significativas en los valores de retrodispersión. Se puede utilizar las recomendaciones metodológicas referentes al uso de las imágenes TSX y S-1 para el mapeo de la cobertura de hielo en los lagos y el monitoreo de los eventos de quiebra de hielo y de derretimiento de la superficie de lagos en ambientes glaciales y periglaciales.
COMPARISON OF EFFICACY OF TCI MONOTHERAPY WITH TCI AND NARROW BAND UVB IN VITILIGO: A HOSPITAL BASED STUDY.
Authors: Uprety Dr Anisha , Jyoti Paul Dr Bhaskar , Saley Dr Yasser
Published: April 2023

Background:

A skin condition known as vitiligo is an advanced depigmentation of the skin that is characterized by the development of depigmented macules that cause significant social and psychological distress. Although there are various therapy options available, vitiligo management is still a therapeutic challenge for many dermatologists. Topical calcineurin inhibitors, ultraviolet B phototherapy, and topical steroids are examples of conservative treatments.

Objective: This study aims to compare the effectiveness of tacrolimus monotherapy and narrowband ultraviolet B phototherapy (NB-UVB) for treating vitiligo.

Materials and Methods: :For a period of two years, 100 vitiligo patients who presented to the dermatology outpatient department of the first Dali university associated hospital underwent a prospective and comparative study (from 2018-1-1 to 2019-12-31). All of the participants in this study met the inclusion and exclusion criteria after receiving the necessary ethical approval. According to the vitiligo data Proforma, demographic information was checked during the initial appointment.

All individuals with vitiligo underwent a complete clinical and dermatological examination of their condition. The associated laboratory tests were all finished. It was assessed how much of the body's surface area is affected by vitiligo. On the basis of their course of therapy, patients were divided into two groups at random. Tacrolimus ointment was applied topically to 50 patients in group A twice daily. 50 patients in group B received topical medication three times per week in addition to NB-UVB phototherapy.

The VASI (Vitiligo Area Severity Index) was used to compare the effectiveness of the two groups from the beginning of the trial to its conclusion. Global ratings from both patients and physicians were calculated as part of the study's secondary efficacy measure. Software called SPSS 23.0 was used to do the statistical analysis. At p 0.05, the difference was statistically significant.

Results: After 12 months of treatment, topical treatment alone outperformed Narrow Band UVB in terms of overall effectiveness. Patients treated with narrow band UVB plus topical treatment have earlier repigmentation response to lesions in the face, trunk, upper limbs, and lower limbs than those treated with topical treatment alone. When comparing the trunk, face, upper, and lower limbs for both types of therapies, lesions in the hands and feet require a lengthier course of treatment.

Conclusion:

Narrow band UVB along with TCI is of higher efficacy, better tolerated and superior to TCI monotherapy in the treatment of vitiligo. There was a statistically significant reduction in percentage of VASI p=   with Narrow Band UVB along with TCI group when compared to TCI mono therapy alone.
THE EFFECT OF DIET SHOF (SIXTEEN HOUR OF FASTING) ON TRIGLYCERIDE LEVELS IN OVERWEIGHT ADOLESCENTS
Authors: Khotimah Khotimah , Herin Mawarti
Published: April 2023

Body weight exceeding normal body weight (Overweight) is a cause of increased triglyceride levels. High triglyceride levels (hypertriglyceridemia) are a risk for coronary heart disease and diabetes mellitus. Efforts that can be made to reduce hypertriglyceridemia is to reduce the number of meals with the shof diet (sixteen hours of fasting). During fasting triglycerides will be mobilized to produce energy or synthesized into glucose. The aim of this study was to determine the effect of the shof diet on reducing triglyceride levels in overweight adolescents. The research design used the Pre-Experiment One Group Pretest-Postest Design with a population of all female students of the Faculty of Health Sciences who experienced overwight as much as 25. The number of samples was 20 with a sampling technique using purposive sampling. The research instrument uses an observation sheet. Data were analyzed using the Wilcoxon test with a P value ≤ α (α = 0.05). The results showed that the value of P = 0.646, which means that there was no effect of the shof diet on reducing triglyceride levels. However, in terms of quantity, there was a decrease in triglyceride levels in most of the respondents. The shof diet can reduce triglyceride levels by controlling food consumption during the fasting window.
INTERNAL AND EXTERNAL FACTORS ON STATE-OWNED ENTERPRISES STOCK PRICES
Authors: Roseno Haris
Published: April 2023

Stocks are proof of ownership with their value determining the amount of control over a company. Shares are securities aimed at obtaining fresh funds from investors, for investor's stocks are investments that provide ownership rights. Share prices are determined by demand and supply made by investors. However, investors before making transactions on the stock exchange will conduct an analysis involving external and internal factors. The purpose of this study is to determine the effect of external and internal factors on the stocks prices of state-owned enterprises which are majority owned by the state and of course get privileges and full support from the government. This study uses panel data which aims to analyze the influence of external and internal factors on the stock prices of 14 State-Owned Enterprises listed on the Indonesia Stock Exchange from 2015 to 2020. Using the multiple regression analysis method with the fixed effect model as the selected model, the results show that factors Externally, namely Indonesia's trade balance and the exchange rate, it has a significant negative effect, while internal factors, consisting of the current ratio and debt to equity ratio, also have a significant negative effect on SOE stock prices