bluuebunny/crossref_metadata_2025 huggingface dataset:
Estrategias de captura de presas y Sistemas de armas de los cazadores- recolectores que habitaron el humedal del Paraná inferior: una aproximación experimental y arqueológica
Authors: Sacur Silvestre Romina , Buc Natacha , Acosta Alejandro , Loponte Daniel
Published: February 2020

Los conjuntos artefactuales de los sitios de cazadores-recolectores que habitaron el humedal del Paraná inferior durante el Holoceno reciente cuentan con una gran variedad de puntas líticas y óseas, destacándose entre estas últimas las puntas planas pedunculadas, las bipuntas y las puntas ahuecadas. El objetivo último de este trabajo es evaluar la relación que habrían tenido dichas piezas con los diferentes sistemas de armas y estrategias generadas para la captura de las presas. Para ello, en primer lugar se evaluaron las estructuras físicas, métricas, morfológicas y microscópicas de los distintos grupos morfológicos de puntas arqueológicas proponiendo su asociación con determinados sistemas de armas. A partir de ello, desarrollamos un programa experimental con el objetivo de evaluar la performance de cada uno bajo las condiciones esperadas.
Tafonomía lítica y modelo de la dinámica eololacustre del norte de la Bahía San Sebastián (Tierra del Fuego, Argentina)
Authors: Borrazzo Karen
Published: February 2020

El objetivo de esta investigación es evaluar el impacto de la dinámica geomorfológica local sobre los patrones espaciales y la integridad de los conjuntos líticos recuperados en las planicies eololacustres ubicadas en el norte de la bahía San Sebastián (Tierra del Fuego, Argentina). La información geológica y los datos experimentales obtenidos en estudios longitudinales realizados en el sector son utilizados para delinear un modelo de la dinámica ambiental. Luego, se generan expectativas para el registro arqueológico recuperado en las planicies. Finalmente, los patrones de los conjuntos líticos de una localidad arqueológica son evaluados a la luz del modelo propuesto y se exponen las tendencias generales para el registro lítico local. Se concluye que la ocurrencia, características y patrones de distribución de los artefactos líticos están fuertemente influidos por los procesos tafonómicos que actúan sobre ellos.
Diseños y usos de los artefactos líticos manufacturados por talla en la cuenta superior del Arroyo Tapalqué (Provincia de Buenos Aires)
Authors: Pal Nélida
Published: February 2020

En objetivo de este trabajo es discutir cómo se relacionan las prácticas de consumo con el diseño de los artefactos. Para cumplir con el mismo se tomaron en cuenta los datos alcanzados del análisis tecno-morfológico y funcional de base microscópica de los instrumentos recuperados la cuenca superior del Arroyo Tapalqué (provincia de Buenos Aires). Los resultados obtenidos posibilitan plantear que no es posible efectuar una vinculación directa y de manera unívoca entre el diseño y la función de los instrumentos. No obstante, se subraya que la selección de algunos atributos morfológicos (forma del borde) y dimensionales (longitud del filo, largo del soporte y módulo L/A) se relacionan con el contexto de uso.
Análisis territorial en arqueología: percepción visual y accesibilidad del entorno
Authors: Zamora-Merchán Mar
Published: February 2020

En este artículo continuamos con una línea de trabajo que venimos desarrollando desde hace varios años (véase epígrafe de bibliografía) y que busca mejorar la metodología empleada en la realización de los análisis de visibilidad referidos al entorno de los asentamientos en altura de época iberorromana, metodología que también es aplicable en buena medida a otros períodos y contextos históricos. En concreto, vamos a plantear una aproximación a la visibilidad existente en torno al poblado del Cerro de la Cruz (Almedinilla, Córdoba) que consiste en una valoración cualitativa del área de visibilidad potencial desde el yacimiento menos rígida y parcial de lo habitual en los cálculos de visibilidad al uso. Para ello hemos atendido también al grado de accesibilidad a pie que tienen las zonas no visibles desde el poblado a fin de comprobar si se trata de zonas que, aunque ocultas a la vista, son rápidamente alcanzables por otros medios, lo que restaría cierta importancia práctica a su cualidad de no visible. El análisis de la visibilidad del territorio en arqueología se realiza mediante Sistemas de Información Geográfica (SIG). Aunque en ocasiones se ha considerado al cálculo informático de visibilidad como el mayor avance cualitativo en el estudio de los paisajes de la antigüedad mediante SIG, son numerosos los autores que han reflexionado acerca de los aspectos a mejorar, algunas de cuyas reflexiones recogemos también aquí.
RESTOS ÓSEOS HUMANOS FRAGMENTADOS DEL CEMENTERIO INDÍGENA DE BARADERO. ALCANCES Y LIMITACIONES DE SU ESTUDIO BIOARQUEOLÓGICO
Authors: Kozameh Livia , Tapia Alicia , López Manuel , Testa Nora
Published: February 2020

Se analiza un conjunto de restos óseos humanos fragmentados correspondientes al sitio “Cementerio Indígena”, ubicado en Baradero, Pcia. de Buenos Aires. Según las características de los materiales asociados a los enterratorios se atribuyó una cronología correspondiente a la primera mitad del siglo XVII; esta estimación temporal ha sido corroborada actualmente mediante dos fechados radiocarbónicos. El registro arqueológico se ha vinculado con la misión franciscana “Santiago del Baradero” que fundó Hernandarias en 1615. Entre los objetivos que se persiguen con este estudio se destacan: la revalorización de la información bioarqueológica que proporcionan los restos óseos fragmentados con características similares a las de un osario; y la relevancia que adquiere este registro dado que es único en su tipo y puede aportar conocimientos sobre el impacto de la empresa evangelizadora colonial en el área. Si bien el estudio bioarqueológico está limitado por la falta de integridad de las piezas esqueletales, rescatamos información sobre el número mínimo de individuos, edad, sexo, posibles patologías e indicadores de actividad más frecuentes. Asimismo, estimando un número mínimo de 19 individuos evaluamos indicadores de estrés nutricional y dieta mediante el análisis dentario. Discutimos su relación con el contexto sociocultural y los posibles cambios producidos por el conflicto interétnico.
GEOARQUEOLOGÍA DEL SITIO CUEVA MARIPE, MACIZO DEL DESEADO, PROVINCIA DE SANTA CRUZ, ARGENTINA
Authors: Mosquera Bruno
Published: February 2020

Se presenta el análisis geoarqueológico del sitio Cueva Maripe ubicado en el Macizo del Deseado, Patagonia Argentina. El objetivo de este trabajo radicó en la caracterización e interpretación genética de los depósitos sedimentarios que conforman el piso de las dos cámaras que conforman el sitio Cueva Maripe. Asimismo, ha tenido por finalidad reconocer los procesos de formación implicados en cada cámara y la relación entre ambos sectores excavados. Los resultados obtenidos muestran variabilidad estratigráfica entre las cámaras, ya que se reconocieron procesos depositacionales y post-depositacionales que actuaron de manera diferente, los cuales incidieron en la resolución e integridad del registro arqueológico así como también, en la utilización del espacio por parte de los grupos humanos que habitaron la cueva desde la Transición Pleistoceno-Holoceno hasta el Holoceno Tardío.
OCUPACIONES AGROPASTORILES EN LOS SECTORES INTERMEDIOS DE ANTOFAGASTA DE LA SIERRA (CATAMARCA): UN ANÁLISIS DESDE PUNTA DE LA PEÑA 9.1
Authors: Babot M. del Pilar , Aschero Carlos , Hocsman Salomón , Haros M. Cecilia , González Baroni Lucía G. , Urquiza Silvana V.
Published: February 2020

Se analizan las evidencias arqueológicas provistas por la Estructura 3, sector 1, del sitio Punta de la Peña 9 en Antofagasta de la Sierra (Catamarca). Se describen tres momentos de ocupación por parte de grupos agropastoriles, los cuales marcan pautas diferentes de uso del espacio intramuros para un lapso acotado que comienza ca. 1400 años AP y, probablemente, no supera los ca. 1100 años AP. Se establecen vínculos con otros asentamientos residenciales del fondo de cuenca y sectores intermedios en la microrregión, y se señalan indicadores de interacción con grupos de otros ámbitos puneños, valles mesotermales y bosques nublados.
CHACRAS DISPERSAS. UNA APROXIMACIÓN ETNOGRÁFICA Y ARQUEOLÓGICA AL ESTUDIO DE LA AGRICULTURA PREHISPÁNICA EN LA REGIÓN SERRANA DE CÓRDOBA (ARGENTINA).
Authors: Medina Matías E. , Pastor Sebastián
Published: February 2020

Las comunidades productoras de alimentos que ocuparon las Sierras de Córdoba (Argentina) entre ca. 1200-300 AP implementaron una estrategia predominante agrícola, con estrategias complementarias de caza-recolección y, probablemente, pastoriles. Sin embargo, el conocimiento arqueológico acerca de las prácticas agrícolas prehispánicas es actualmente limitado y está parcialmente construido en base a líneas de evidencia indirectas. La información más significativa proviene de la documentación producida durante los primeros momentos del régimen colonial español (siglos XVI y XVII), que describe un sistema agrícola nativo sin regadíos, con uso de numerosas chacras. En este trabajo se presenta información etnográfica actual sobre la producción agrícola de pequeña escala en diferentes ámbitos de las Sierras de Córdoba, colocando especial énfasis en el sistema de dispersión de campos de cultivos y en cómo éste permite afrontar algunas situaciones de riesgo que se imponen sobre la actividad. Se derivan luego algunas expectativas arqueológicas y se presenta información actualizada acerca de la distribución espacial de sitios prehispánicos. Finalmente, se plantea la posibilidad de que algunas de las situaciones arqueológicas reconocidas en el Valle de Salsacate, en la porción septentrional del Valle de Punilla y en sectores específicos de las pampas de altura tengan relación con la implementación de este tipo de estrategias.
INVESTIGACIONES ARQUEOLÓGICAS EN LA CUENCA DEL ARROYO CHASICÓ Y LLANURA ADYACENTE, SUDOESTE DE LA PROVINCIA DE BUENOS AIRES
Authors: Oliva Fernando , Avila Juan David , Ayuso María Pia , Catella Luciana , Gallego Marida
Published: February 2020

En este trabajo se presenta la información generada a partir de prospecciones y recolecciones superficiales llevadas a cabo en la cuenca media e inferior del arroyo Chasicó yen el área que conforma su límite Oeste. Las mismas tuvieron por objetivo reconocer la disponibilidad de recursos en los diferentes sectores de la HaJarra adyacente al Sistema Serrano de Ventania y analizar las vinculaciones establecidas entre los distintos ambientes del área, considerándose en particular en esta primera etapa, el material lírico, por ser un recurso que brinda información sobre el uso del espacio y las vinculaciones existentes entre los diferentes ambientes.
Optimizing Work Online Services Based Inaportnet To Increase Service On Shipping Arrival at PT Maskapai Pelayaran Pulau Laut Panjang Branch
Authors: Indriyati Retno , Dwiputra Novarizal Baharudiansyah
Published: February 2020

This writing aims to find out about Standard Operating Procedure and Service Level Agreement Inaportnet system, from before the ship arrived until the management of ship permit out. In carrying out the ship agency's duties which include ship clearance activities with Inaportnet, it is necessary to have knowledge of Inaportnet application form.

Data collection methods used in the writing of Scientific Writing is a method of observation or observation, interview or interview method, literature study method and documentation method.

The results of the writing show that online services based on Inaportnet can facilitate the tasks of the users of sea transport services in serving the arrival of ships in the Port of Bandar Lampung. However, there are still obstacles in the application of Inaportnet system such as low quality of service, network interruption on server, lack of utilization of science and technology and complicated application usage procedure.  The result of this writing can be concluded that Inaportnet-based online service is a single electronic information service system based on internet to integrate port system of information which nature standard serve ship and goods from all related institution or stakeholder at port.
Pengaruh Ukuran Diameter Gravity Disc terhadap Overflow pada Purifier
Authors: Khamdilah Ali , Wilastari Santhi
Published: February 2020

Untuk menghindari permasalahan dalam mengoperaikan purifier dibutuhkan suatu standart yang baik,dimana kesalahan dalam pemilihan ukuran grafity disc  akan berakibat fatal dalam sistem pemisahan minyak dengan kotoran.

Perbandingan antara masukan dan keluaran pada proses purifier  haruslah seimbang dengan toleransi yang masih diperbolehkan,sehingga tidak terjadi tumpahan  / overflow  yang sangat merugikan  dengan terbuangnya minyak  selama proses pemisahan karena ketidak mampuan gravity disc dalam menjaga minyak hasil proses pembersihan purifier.
Pemanfaatan Engine Log Book Sebagai Sumber Data Untuk Melakukan Analisa Kuantitatif Kehandalan Dan Perawatan Permesinan Di Kapal
Authors: Dwi Kurniawan Ratna , Darmana Eka
Published: February 2020

Melihat beberapa catatan harian kamar mesin (engine Log Book) di kapal, dapat diketahui bahwa perawatan permesinan yang dilakukan masih bersifat konvensional, perawatan dilakukan hanya saat komponen/sistem mengalami kegagalan atau saat kapal berlabuh. Berbagai metode perawatan dapat dilakukan untuk mencapai unjuk kerja dan biaya yang optimum. Dalam studi ini menawarkan analisa kehandalan secara kuantitatif dengan memanfaatkan data yang sudah ada dari engine log book, dengan sample perawatan pada sistem bahan bakar dari Main Engine. Sebagai output Analisa kuantitatif ini akan dapat diketahui nilai reliability dan unreliability sebagai fungsi waktu dan rata-rata waktu komponen akan mengalami kegagalan. Selain itu akan diketahui tren grafik laju kegagalan sehingga dapat diketahui apakah komponen dalam masa operasional atau sudah memasuki masa wear out / aus. Harapannya metode ini dapat diadopsi sebagai bahan pertimbangan dalam melakukan perawatan permesinan di kapal.
The Analyses Of Grammatical Aspect Of Number and Gender From English Into Indonesian Novel Translated by Silamurti Nugroho
Authors: Haryani Haryani , Rahmawati Yusi
Published: February 2020

Tujuan dari penelitian ini adalah untuk menganalisa dan mendeskripsikan tentang bagaimana seorang penerjemah Indonesia mengartikan makna number dan gender seperti yang dianjurkan oleh Mona Baker. Disamping itu, metode deskriptif qualitatif dan content analysis telah digunakan dalam menganalisa data, dan diambil hanya sebesar 20% dari keseluruhan objek yang dikaji. Hasil penelitian yang diperoleh adalah: 1). Penggunaan number dengan kategori SS adalah sebesar 917 (61%); sedangkan kategori PS dan PP hampir memiliki nilai yang sama, yaitu 314 (21%) dan 264 (17%); namun untuk kategori SP adalah hanya 22 (1%); 2). Penggunaan Gender notion di GN adalah sebesar 248 (55%), dan NG adalah sebesar 207 (45%); 3). Oleh karena itu, dapat disimpulkan bahwa penerjemah telah berhasil melakukan penerjemahan terhadap teks tersebut dalam notion Number dan Gender di dalam novelnya.
PROJETO DE MELHORIA INCREMENTAL NO SISTEMA DE CONFORMAÇÃO DE PERFILADOS METÁLICOS A FRIO PARA REDUÇÃO DO LEAD TIME E AUMENTO DE PRODUTIVIDADE.
Authors: Tiburcio Gabriel Galhardo , Pacheco Lucas De Macedo , Oliveira Jr. Paulo Cesar , Scarpite Fabio , Moura Roque Antonio de
Published: February 2020

Este artigo objetiva apresentar soluções para melhoria no sistema de conformação de perfilados à frio, implantado um projeto que reduz o tempo de reparo, facilita o ajuste dos rolos de conformação e maximiza a produtividade. O método adotado contou com vasta literatura técnica e conceitual e programas de análise matemática computacional. O resultado foi um projeto foi a instalação de trilhos anexados na máquina perfiladora, permitindo o deslocamento dos rolos, ajuste e a realização de manutenção quando necessário. Conclui-se que o projeto cooperou facilitando o acesso e manutenção dos rolos, que impactam diretamente na redução do tempo médio de reparo e aumenta a disponibilidade da máquina.
APRENDIZADO E COMPETÊNCIAS, UMA DIFÍCIL RELAÇÃO ENTRE CONSTRUIR O CONHECIMENTO E PARCOS INVESTIMENTOS EM RECURSOS PARA A EDUCAÇÃO.
Authors: Moura Sílvia Lobato dos Santos e , Monteiro Jessica Paiva , Moura Roque Antônio de
Published: February 2020

A tecnologia tende a distanciar-se da educação profissional pública, pois cortes no orçamento privam a atualização dos recursos para aprendizagem. Assim, este artigo objetiva revisar bibliograficamente e demonstrar que o aprendizado das gerações baby boomer, “x” e “y”, pouco se atualizaram na dicotomia acadêmico-profissional. O método utilizado contou com uma revisão bibliométrica e uma pesquisa com 331 indivíduos de ambos os sexos, com idade de 20 até 60 anos portadores no mínimo do diploma do ensino médio. O resultado demonstrou que há falta de planejamento e atualização dos recursos para ensinar, o que compromete o conhecimento e a habilidade técnica dos alunos. Conclui-se que quando há uma lacuna vaga, algo a preencherá, ou seja, onde faltou à competência tecnológica a mesma foi preenchida com as competências emocional e social, deduzindo que o egresso precisa desenvolver a competência sociabilidade para que seja aceito pelo time de trabalho.
ESPACIALIZAÇÃO DE OCORRÊNCIAS POLICIAIS E ELABORAÇÃO DE UM MAPA WEB DA CRIMINALIDADE EM 2018 NO MUNICÍPIO DE JACAREÍ – SP.
Authors: Oliveira Camila Maria Silva de , Santos Eduardo
Published: February 2020

Os Sistemas de Informação Geográfica (SIGs), que são ferramentas cada vez mais utilizadas no cotidiano, estão presentes em inúmeros recursos que facilitam o acesso da população à diversos meios de informação. Nesse contexto, temos os dados de criminalidade que representam as transgressões as leis. O objetivo primário deste trabalho é apresentar uma solução que facilite a visualização pelo poder público e da população em geral de dados sobre a criminalidade nas diversas regiões da cidade de Jacareí – SP, espacializando diferentes classes de crimes, obtidos através da Secretaria de Segurança Pública do estado. Foi gerado um mapa da cidade que aponta os crimes e suas respectivas localizações no ano de 2018. A partir desses dados, é possível facilitar a visualização de regiões mais violentas, e futuramente realizar estudos a respeito dos fatos apresentados.
DESENVOLVIMENTO DE APLICATIVO PARA AUXÍLIO NO CONTROLE DE ESTOQUE DE EMBALAGENS EM UMA EMPRESA DE TECNOLOGIA.
Authors: Varella Bagattini Guilherme , Martins Flavia Guska , Jacinto Adriana Da Silva
Published: February 2020

Este artigo trata da elaboração de um aplicativo utilizando o MIT App Inventor, tendo como foco a aplicação dos conhecimentos adquiridos nas disciplinas ao longo do curso de logística, onde aprendemos conceitos de programação em projeto interdisciplinar IV, gestão de estoques, movimentação e armazenagem, gestão da cadeia de suprimentos e embalagens. Tem por objetivo o acompanhamento do estoque de embalagens utilizadas para envio de produtos eletrônicos para clientes e fornecedores. A importância do controle de estoques e a realização do pedido no tempo certo, evitando o excesso ou que acabe as unidades do estoque, visando sempre diminuir custos e maximizar os lucros.
GERENCIAMENTO E ANÁLISE DE DADOS DA GESTÃO DA CADEIA DE SUPRIMENTOS APLICANDO AS FERRAMENTAS CIS-ERP E POWER BI.
Authors: Vicente Andreza Mislena , De Freitas Gislaine Camila , Costa Jean Carlos Lourenço
Published: February 2020

Ao longo dos anos, muitas organizações iniciaram suas atividades, a fim de atenderem seus clientes no menor tempo possível. Dessa forma, a competividade no mercado aumenta constantemente, fazendo com que os gestores adquiram softwares de gestão empresarial que ajudem no desenvolvimento de sua organização. Neste artigo, será apresentado os sistemas CIS-ERP e Power BI na Paróquia Espírito Santo em São José dos Campos (SP) e tem como finalidade abordar os principais problemas enfrentados pela instituição principalmente na área de gestão da cadeia de suprimentos. A utilização dos sistemas CIS-ERP e Power BI chegam para otimizar e proporcionar dados mais precisos na gestão de estoques, possibilitando atender a demanda de forma ágil, eficiente e precisa.
SISTEMA DE CONTROLE E AQUISIÇÃO DE DADOS PARA MEDIDA DE REFLETÂNCIA UTILIZANDO MATLAB
Authors: Morais Pedro Luis Pereira , Berni Luiz Ângelo , De Oliveira Nanci
Published: February 2020

As variações da irradiação solar total (TSI) influenciam o clima da Terra. Essas mudanças impactam no balanço de energia global e medições precisas são fundamentais para entender os efeitos em longo prazo dessa influência. Essas medições utilizam radiômetros de substituição elétrica, os quais dependem de cavidades absorvedoras de radiação solar. As cavidades possuem o interior revestido com materiais pretos para absorver a radiação solar incidente. Este trabalho consiste num projeto realizado no Laboratório Associado de Sensores e Materiais (LABAS) do Instituto Nacional de Pesquisa Espaciais (INPE), que visa desenvolver um software de sistema de controle e aquisição de dados em Matlab, para fazer leituras de refletância de objetos, expostos a uma luz emitida por um laser, com um sensor de fotodiodo acoplado a uma esfera integradora.
Galaxy Clusters Selected via the Sunyaev–Zel’dovich Effect in the SPTpol 100-square-degree Survey
Authors: Huang N. , Bleem L. E. , Stalder B. , Ade P. A. R. , Allen S. W. , Anderson A. J. , Austermann J. E. , Avva J. S. , Beall J. A. , Bender A. N. , Benson B. A. , Bianchini F. , Bocquet S. , Brodwin M. , Carlstrom J. E. , Chang C. L. , Chiang H. C. , Citron R. , Moran C. Corbett , Crawford T. M. , Crites A. T. , Haan T. de , Dobbs M. A. , Everett W. , Floyd B. , Gallicchio J. , George E. M. , Gilbert A. , Gladders M. D. , Guns S. , Gupta N. , Halverson N. W. , Harrington N. , Henning J. W. , Hilton G. C. , Holder G. P. , Holzapfel W. L. , Hrubes J. D. , Hubmayr J. , Irwin K. D. , Khullar G. , Knox L. , Lee A. T. , Li D. , Lowitz A. , McDonald M. , McMahon J. J. , Meyer S. S. , Mocanu L. M. , Montgomery J. , Nadolski A. , Natoli T. , Nibarger J. P. , Noble G. , Novosad V. , Padin S. , Patil S. , Pryke C. , Reichardt C. L. , Ruhl J. E. , Saliwanchik B. R. , Saro A. , Sayre J. T. , Schaffer K. K. , Sharon K. , Sievers C. , Smecher G. , Stark A. A. , Story K. T. , Tucker C. , Vanderlinde K. , Veach T. , Vieira J. D. , Wang G. , Whitehorn N. , Wu W. L. K. , Yefremenko V.
Published: February 2020

We present a catalog of galaxy cluster candidates detected in 100 square degrees surveyed with the SPTpol receiver on the South Pole Telescope. The catalog contains 89 candidates detected with a signal-to-noise ratio greater than 4.6. The candidates are selected using the Sunyaev–Zel’dovich effect at 95 and 150 GHz. Using both space- and ground-based optical and infrared telescopes, we have confirmed 81 candidates as galaxy clusters. We use these follow-up images and archival images to estimate photometric redshifts for 66 galaxy clusters and spectroscopic observations to obtain redshifts for 13 systems. An additional two galaxy clusters are confirmed using the overdensity of near-infrared galaxies only and are presented without redshifts. We find that 15 candidates (18% of the total sample) are at redshift z ≥ 1.0, with a maximum confirmed redshift of

. We expect this catalog to contain every galaxy cluster with

and z > 0.25 in the survey area. The mass threshold is approximately constant above z = 0.25, and the complete catalog has a median mass of approximately

. Compared to previous SPT works, the increased depth of the millimeter-wave data (11.2 and 6.5 μK-arcmin at 95 and 150 GHz, respectively) makes it possible to find more galaxy clusters at high redshift and lower mass.
Applying Noether’s Theorem to Matter in the Milky Way: Evidence for External Perturbations and Non-steady-state Effects from Gaia Data Release 2
Authors: Gardner Susan , Hinkel Austin , Yanny Brian
Published: February 2020

We apply Noether’s theorem to observations of main-sequence stars from the Gaia Data Release 2 archive to probe the matter distribution function of the Galaxy. That is, we examine the axial symmetry of stars at vertical heights z,

, to probe the quality of the angular momentum L

z
as an integral of motion. The failure of this symmetry test would speak to a Milky Way, in both its visible and dark matter, that is not isolated and/or not in steady state. The left–right symmetry-breaking pattern we have observed, north and south, reveals both effects, with a measured deviation from symmetry of typically 0.5%. We show that a prolate form of the gravitational distortion of the Milky Way by the Large Magellanic Cloud, determined from fits to the Orphan stream by Erkal et al., is compatible with the size and sign of the axial-symmetry-breaking effects we have discovered in our sample of up to 14.4 million main-sequence stars, speaking to a distortion of an emergent, rather than static, nature.
The NANOGrav 11 yr Data Set: Evolution of Gravitational-wave Background Statistics
Authors: Hazboun J. S. , Simon J. , Taylor S. R. , Lam M. T. , Vigeland S. J. , Islo K. , Key J. S. , Arzoumanian Z. , Baker P. T. , Brazier A. , Brook P. R. , Burke-Spolaor S. , Chatterjee S. , Cordes J. M. , Cornish N. J. , Crawford F. , Crowter K. , Cromartie H. T. , DeCesar M. , Demorest P. B. , Dolch T. , Ellis J. A. , Ferdman R. D. , Ferrara E. , Fonseca E. , Garver-Daniels N. , Gentile P. , Good D. , Holgado A. M. , Huerta E. A. , Jennings R. , Jones G. , Jones M. L. , Kaiser A. R. , Kaplan D. L. , Kelley L. Z. , Lazio T. J. W. , Levin L. , Lommen A. N. , Lorimer D. R. , Luo J. , Lynch R. S. , Madison D. R. , McLaughlin M. A. , McWilliams S. T. , Mingarelli C. M. F. , Ng C. , Nice D. J. , Pennucci T. T. , Pol N. S. , Ransom S. M. , Ray P. S. , Siemens X. , Spiewak R. , Stairs I. H. , Stinebring D. R. , Stovall K. , Swiggum J. , Turner J. E. , Vallisneri M. , van Haasteren R. , Witt C. A. , Zhu W. W. ,   (The NANOGrav Collaboration)
Published: February 2020

An ensemble of inspiraling supermassive black hole binaries should produce a stochastic background of very low frequency gravitational waves. This stochastic background is predicted to be a power law, with a gravitational-wave strain spectral index of −2/3, and it should be detectable by a network of precisely timed millisecond pulsars, widely distributed on the sky. This paper reports a new “time slicing” analysis of the 11 yr data release from the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) using 34 millisecond pulsars. Methods to flag potential “false-positive” signatures are developed, including techniques to identify responsible pulsars. Mitigation strategies are then presented. We demonstrate how an incorrect noise model can lead to spurious signals, and we show how independently modeling noise across 30 Fourier components, spanning NANOGrav’s frequency range, effectively diagnoses and absorbs the excess power in gravitational-wave searches. This results in a nominal, and expected, progression of our gravitational-wave statistics. Additionally, we show that the first interstellar medium event in PSR J1713+0747 pollutes the common red-noise process with low spectral index noise, and we use a tailored noise model to remove these effects.
Comparative Study of Data-driven Solar Coronal Field Models Using a Flux Emergence Simulation as a Ground-truth Data Set
Authors: Toriumi Shin , Takasao Shinsuke , Cheung Mark C. M. , Jiang Chaowei , Guo Yang , Hayashi Keiji , Inoue Satoshi
Published: February 2020

For a better understanding of the magnetic field in the solar corona and dynamic activities such as flares and coronal mass ejections, it is crucial to measure the time-evolving coronal field and accurately estimate the magnetic energy. Recently, a new modeling technique called the data-driven coronal field model, in which the time evolution of magnetic field is driven by a sequence of photospheric magnetic and velocity field maps, has been developed and revealed the dynamics of flare-productive active regions. Here we report on the first qualitative and quantitative assessment of different data-driven models using a magnetic flux emergence simulation as a ground-truth (GT) data set. We compare the GT field with those reconstructed from the GT photospheric field by four data-driven algorithms. It is found that, at minimum, the flux rope structure is reproduced in all coronal field models. Quantitatively, however, the results show a certain degree of model dependence. In most cases, the magnetic energies and relative magnetic helicity are comparable to or at most twice of the GT values. The reproduced flux ropes have a sigmoidal shape (consistent with GT) of various sizes, a vertically standing magnetic torus, or a packed structure. The observed discrepancies can be attributed to the highly non-force-free input photospheric field, from which the coronal field is reconstructed, and to the modeling constraints such as the treatment of background atmosphere, the bottom boundary setting, and the spatial resolution.
Constraining the Long-lived Magnetar Remnants in Short Gamma-Ray Bursts from Late-time Radio Observations
Authors: Liu Liang-Duan , Gao He , Zhang Bing
Published: February 2020

The joint detection of GW170817 and GRB 170817A indicated that at least a fraction of short gamma-ray bursts (SGRBs) originate from binary neutron star (BNS) mergers. One possible remnant of a BNS merger is a rapidly rotating, strongly magnetized neutron star, which has been discussed as one possible central engine for gamma-ray bursts. For a rapidly rotating magnetar central engine, the deposition of the rotation energy into the ejecta launched from the merger could lead to bright radio emission. The brightness of radio emission years after an SGRB would provide an estimate of the kinetic energy of ejecta and, hence, a possible constraint on the BNS merger product. We perform a more detailed calculation on the brightness of radio emission from the interaction between the merger ejecta and circumburst medium in the magnetar scenario, invoking several important physical processes such as generic hydrodynamics, relativistic effects, and the deep Newtonian phase. We use the model to constrain the allowed parameter space for 15 SGRBs that have late radio observations. Our results show that an injection energy of E
inj ∼ 1052 erg is allowed for all the cases, which suggests that the possibility of a supramassive or hypermassive neutron star remnant is not disfavored by the available radio data.
Labiobaetis Novikova & Kluge in Borneo (Ephemeroptera, Baetidae)
Authors: Kaltenbach Thomas , Gattolliat Jean-Luc
Published: February 2020

Material collected between 2000 and 2014 on the island Borneo, including the Indonesian province of Kalimantan, the Malaysian province of Sabah and Brunei Darussalam, substantially increased our knowledge of Labiobaetis on this island. The total number of Labiobaetis species in Borneo increased to five, as only one species, L. borneoensis (Müller-Liebenau, 1984), was previously reported. Three new species were identified by morphology and partly by using genetic distance (COI, Kimura 2-parameter). They are described and illustrated based on their larvae (Labiobaetis bakerae sp. nov., L. penan sp. nov. and L. dayakorum sp. nov.); in one case, the imago is described as well. New reports of L. borneoensis are presented and the imago of this species is described for the first time. Labiobaetis moriharai (Müller-Liebenau, 1984), originally described from mainland Malaysia (Province Selangor), is reported from Borneo for the first time. The interspecific K2P distances in Borneo are between 19% and 25%, the intraspecific distances are usually between 0% and 1%. The total number of Labiobaetis species worldwide is augmented to 126.
Recent advances in structural fibre-reinforced concrete focused on polyolefin-based macro-synthetic fibres
Authors: Alberti M. G. , Enfedaque A. , Gálvez J. C. , Picazo A.
Published: February 2020

Fibre-reinforced concrete (FRC) allows reduction in, or substitution of, steel-bars to reinforce concrete and led to the commonly named structural FRC, with steel fibres being the most widespread. Macro-polymer fibres are an alternative to steel fibres, being the main benefits: chemical stability and lower weight for analogous residual strengths of polyolefin-fibre-reinforced concrete (PFRC). Furthermore, polyolefin fibres offer additional advantages such as safe-handling, low pump-wear, light weight in transport and storage, and an absence of corrosion. Other studies have also revealed environmental benefits. After 30 years of research and practice, there remains a need to review the opportunities that such a type of fibre may provide for structural FRC. This study seeks to show the advances and future challenges of use of these polyolefin fibres and summarise the main properties obtained in both fresh and hardened states of PFRC, focussing on the residual strengths obtained from flexural tensile tests.
Release efficiency and selectivity of four different square mesh panel configurations in the Basque mixed bottom trawl fishery
Authors: Cuende Elsa , Arregi Luis , Herrmann Bent , Sistiaga Manu , Basterretxea Mikel
Published: February 2020

Reduction of discards from the Basque mixed bottom trawl fishery is a challenge. To improve the selective properties of the gear used by the fleet and supplement codend size selection, a square mesh panel (SMP) installed in the upper panel of the trawl was introduced in 2006. However, recent studies have shown that the release efficiency of this SMP is low due to lack of contact between the fish and the SMP. In this study, we tested the release efficiency of the SMP for four different gear configurations. We tested the effect of adding LED lights at two different positions and altering panel size and panel position in the trawl. The analyses were focused on two species: hake (Merluccius merluccius) and blue whiting (Micromesistius poutassou). The results showed that the position of LED lights did not significantly affect the SMP’s release efficiency for any species. However, increasing panel size had a significant positive effect on the release efficiency of blue whiting, and placing the SMP in the lower panel improved the release efficiency of hake. These results highlight the challenge of simultaneously improving the selective properties of gear for species with different behaviour, especially in mixed demersal fisheries.
Impact of Agricultural Education on Students’ Career Choice: A Survey
Authors: Omotosho Adebayo , Emmanuel Asani , Ayegba Peace , Ayoola Joyce
Published: February 2020

Agriculture has become the bedrock of some growing economy in the world but the discovery of crude oil and other resources in a developing country like Nigeria has led to the extreme decline in the practice. Many youths now have either low or no interested in agriculture and the majority of the people that are actively practicing are the older generation.

This study revisits the impact of education on students interest in agriculture as a professional career. The study was carried out in an agriculture-based uni-versity with a state of the art equipment. Our findings show that 64% of agricul-ture students who participated in this survey are willing to pursue agriculture-related careers. Likewise, there is a significant relationship between the student’s gender and farm ownership, with 84% of male students likelier to own farms. Also, our results have shown that students in higher levels have more interests in agriculture compared to students at lower levels and this invariably increases the possibilities of their pursuing agriculture-related careers or businesses.
Experiment of the Prototype of Online Learning Resources on Massive Open Online Course (MOOC) to Develop Life Skills in Using Technology Media for Hearing Impaired Students
Authors: Mingsiritham Kemmanat , Chanyawudhiwan Gan
Published: February 2020

This research aimed to experiment the prototype of online learning resources on Massive Open Online Course (MOOC) to develop life skills in using technology media for hearing impaired students. The research sample were 33 hearing impaired students from Thungmahamek School for the Deaf in secondary school level. Tools included pretest, posttest, and satisfaction assessment form. Data analysis was done by average statistics, standard deviation, and content analysis.

The research found that academic achievement scores after the experiment were higher than the scores before the experiment with statistical significance at the level of .05 (t = -12.14, p = .00). The overall students’ satisfaction was at the highest level (X ̅ = 4.53, SD = 0.67). Considering each item, it was found that the up-to-date content has the highest mean (X ̅ = 4.77, SD = 0.48), followed by MOOC learning allowing freedom of study (X ̅ = 4.64, SD = 0.58), the clarity of sign language to describe the content (X ̅ = 4.62, SD = 0.67), and the ease of online access (X ̅ = 4.62, SD = 0.63).
Turkish municipalities: Reconsidering local democracy beyond administrative autonomy
Authors: Bayraktar S. Ulaş
Published: February 2020

Within Turkish political science literature, local democracy has been mainly perceived as an administrative issue defined in the narrow framework of administrative and financial autonomy and simplified in a general dichotomy with the central government. Yet, since the eighties, Turkish municipal framework has undergone very significant administrative, financial and functional changes, albeit without bringing about a veritable democratisation of local politics. As a matter of fact, the popular understanding of local democracy in Turkey does not really deal with infra-local democratic issues such as the problems of power distribution, of political representation and participation. Thus, a different understanding of local democracy beyond dimensions of administrative tutelage, financial resources and functional limits is required. Departing from this observation, I argue that a new conceptualisation of local democracy including more political elements is required to understand the contemporary state of Turkish local politics. This paper intends to be a preliminary step for reaching such a new understanding of local democracy for the Turkish context.
Seismic Performance of Eccentrically Braced Frames with Shear Link
Authors: Ansari Sara , Tashakori Javad , Razzaghi Javad
Published: February 2020

The push-over nonlinear evaluation of four eccentrically braced frame performance was conducted to assess the plastic deformation and location of plastic hinges in buildings with six, nine, twelve and fifteen stories. The excessive plastification of out-of-beam members is revealed in the majority of these buildings while the AISC design provision allows the moderate plastification in these members. Therefore, the beams out of link might be in danger of fracture of web and flange. Likewise, this was controversial evidence in Chrischurch earthquakes. In order to modify this problem either using fixed connection of braced members or using the very short shear links which have less end moment force than out-of-link beams moment strength are recommended. By this modification, the response modification coefficients are calculated for these buildings which are almost equal to the provision value. The maximum plastic rotation of shear links recommended by provisions (0.08 radian) is the upper ultimate limit to prevent emerging of out-of-link member`s instability.
Reusability of the Deep Eutectic Solvent - Novozym 435® Enzymes System in Transesterification from Degumming Palm Oil
Authors: Manurung Renita , Siregar Alwi Gery Agustan
Published: February 2020

In this study, deep eutectic solvent (DES) used as co solvent for enzymatic biodiesel production from degumming palm oil (DPO). DES is formed from the salt compound choline-chloride (ChCI) with glycerol at 1:2 molar ratio. Furthermore, the effectiveness of the DES was tested by enzymatic reactions using novozym 435® for the production of palm biodiesel with raw materials DPO. The use of enzymes with the DES system can maintain the activity and stability of the novozyme enzyme measured by the yield produced until the 10th usage produces biodiesel yield > 99% with a concentration of DES 0.5% with a molar ratio of 0.5% water. Spectra of DES ChCI:glycerol and ChCI:glycerol:water characterized by FTIR, morphological structure novozym by characterized SEM and then biodiesel product analyzed by GC-MS. This shows that the ChCI:glycerol:water system in enzymatic biodiesel production has good potential to maintain enzyme activity and stability.
Critical Care Nurses’ Knowledge of Evidence-Based Guidelines for Preventing Ventilator-Associated Pneumonia: An Evaluation Questionnaire
Authors: Labeau S. , Vandijck D.M. , Claes B. , Van Aken P. , Blot S.I. ,   on behalf of the executive board of the Flemish Society for Critical Care Nurses
Published: February 2020

Background Nurses’ lack of knowledge may be a barrier to adherence to evidence-based guidelines for preventing ventilator-associated pneumonia.

Objective To develop a reliable and valid questionnaire for evaluating critical care nurses’ knowledge of evidence-based guidelines for preventing ventilator-associated pneumonia.

Methods Ten nursing-related interventions were identified from a review of evidence-based guidelines for preventing ventilator-associated pneumonia. Selected interventions and multiple-choice questions (1 question per intervention) were subjected to face and content validation. Item difficulty, item discrimination, and the quality of the response alternatives or options for answers (possible responses) were evaluated on the test results of 638 critical care nurses.

Results Face and content validity were achieved for 9 items. Values for item difficulty ranged from 0.1 to 0.9. Values for item discrimination ranged from 0.10 to 0.65. The quality of the response alternatives led to the detection of widespread misconceptions among critical care nurses.

Conclusion The questionnaire is reliable and has face and content validity. Results of surveys with this questionnaire can be used to focus educational programs on preventing ventilator-associated pneumonia.
فعالية استخدام الحوافز الضريبية في مكافحة التلوث البيئي في المملكة العربية السعودية: دراسة استكشافية
Authors: صالح عبدالرحمن السعد صالح عبدالرحمن السعد
Published: February 2020

هدفت هذه الدراسة إلى استطلاع وجهة نظر المشاركين فيها تجاه فعالية استخدام الحوافز الضريبية في مجال حماية البيئة ومكافحة التلوث البيئي في المملكة العربية السعودية.ولتحقيق هذا الهدف، تم استخدام منهاج الاستقراء النظري؛ حيث تم استقراء البحوث والدراسات المتعلقة بموضوع البحث في الجزء النظري، ثم تحليل الأفكار والجوانب العلمية والعملية التي اشتملت عليها تلك الدراسات، وتوظيفها لخدمة البحث في جانبه النظري والميداني، وفي الجزء الميداني تم الاعتماد على كلا المنهاجين الاستقرائي والوصفي التحليلي، حيث تم التعرف على فعالية استخدام الحوافز الضريبية في مكافحة التلوث البيئي من خلال قائمة استبيان تم تصميمها لهذا الغرض.وقد توصلت الدراسة إلى فعالية استخدام الحوافز الضريبية في مكافحة التلوث البيئي؛ حيث بلغ المتوسط الحسابي لإجابات المشاركين في الدراسة (4,24)، مع ملاحظة أن المشاركين في الدراسة يفضلون استخدام الإعفاءات الضريبية محددة المدة عن غيرها من الحوافز الضريبية الأخرى.وتوصي الدراسة باستخدام الحوافز الضريبية ـ كأداة من أدوات السياسة البيئية ـ بالإضافة إلى مبدأ السياسة الوقائية المتبع في المملكة العربية السعودية لتحقيق أهداف التنمية المستدامة، وإجراء المزيد من الدراسات في مجال استخدام الحوافز الضريبية والزكوية لحماية البيئة ومكافحة التلوث البيئي.
Case Report: An Adolescent Girl with Isolated Neuropsychiatric Features and Apparent Post-Malaria Neurological Syndrome
Authors: Panda Prateek Kumar , Sharawat Indar Kumar , Panda Pramod Kumar
Published: February 2020

The post-malaria neurological syndrome (PMNS) is an unusual and relatively underreported complication of malaria, which usually occurs after the resolution of acute febrile illness and the patient is free from parasitemia. The clinical spectrum of the PMNS varies from acute-onset cerebellar ataxia to significant encephalopathy with focal deficits resembling acute disseminated encephalomyelitis. Uncommon presentations of PMNS include Guillain–Barre syndrome, postural tremor, or even isolated neuropsychiatric features. Although in a significant proportion of PMNS cases clinical resolution occurs with conservative treatment only, corticosteroids have been used in an attempt to hasten recoveries. Here, we present a case of a 12-year-old girl with acute onset, isolated neuropsychiatric features, following Plasmodium falciparum malaria. Neuroimaging, clinical examination, and cerebrospinal fluid studies were within normal limits. The child recovered completely after treatment with methylprednisolone pulse therapy. This case report illustrates the need for creating awareness about this uncommon complication of malaria. In view of the uncommon complication, early diagnosis and prompt treatment might help in the early resolution of symptoms.
Model Description Documentation Recommended Practice for Ground Vehicle System and Subsystem Simulation
Authors:   Dynamical Modeling and Simulation Committee
Published: February 2020

SAE J2998 defines the recommended information content to be included for documenting dynamical models used for simulation of ground vehicle systems. It describes the information that should be compiled to describe a model for the following user applications or use cases: (1) exchange, promotion, and selection; (2) creation requests; (3) development process management; (4) compatibility evaluation; (5) testing-in-the-loop simulations with hardware and/or software; (6) simulation applications; and (7) development and maintenance. For each use case, a model description documentation (MDD) template is provided in the appendices to facilitate model documentation. In addition, an example of a completed model documentation template is provided in the appendices.
Wireless Corrosion Monitoring Sensors Based on Electromagnetic Interference Shielding of RFID Transponders
Authors: He Youliang
Published: February 2020

Electromagnetic interference (EMI) shielding is a common technology used to protect electronic devices from the interference of environmental noise or to prevent the radiation of electromagnetic waves from electronic devices to the environment. In this research, the EMI shielding principle was utilized to develop a simple and cost-effective wireless corrosion-monitoring sensor. A thin metal sheet (e.g., a steel foil) similar to the material to be monitored was attached onto the surface of a radio frequency identification (RFID) transponder and served as an RF shielding layer to block the communication between the RFID transponder and the transceiver. The shielded transponder (the sensor) was then subjected to corrosion exposure, which caused the corrosion of the shielding metal sheet and led to the degradation of the shielding effectiveness. By chronically recording the change of the RF signal strength and the amount of corrosion that occurred, a correlation could be established between the signal strength and the corrosion rate. In this way, a simple wireless corrosion-monitoring sensor was developed. Steel sheets with various thicknesses (50 μm to 250 μm) were used as shielding layers on ultra-high-frequency RFID transponders, and the sensors covered by these various sheets behaved differently during corrosion exposure. The microstructure change of the shielding material was characterized by optical microscopy and scanning electron microscopy, which revealed the uneven thinning and final damage of the shielding layer, leading to the (partial) restoration of the RF signal.