bluuebunny/crossref_metadata_2025_split huggingface dataset:
Villegas, Javier y Adriana Solís (2014). Historias compartidas Ejido Carlos Cano Cruz. Migración Interna y Colonización en el Siglo XX en Campeche. México, D.F.: Plaza y Valdés/Universidad Autónoma de Campeche/Universidad Autónoma del Carmen, 210 pp.
Authors: Roca Lourdes 
Published: April 2019

Cuando escuchamos música y de repente la melodía cambia de tono, nuestro estado de ánimo se reorienta. Podemos pasar de la mayor sensación de tragedia, a la mejor de las alegrías, de la opresión en el pecho a una oleada de pasión o energía. Este es uno de tantos potenciales que tiene la música, como también lo podemos encontrar de forma muy clara en el cine.
Pocas veces sucede esto con un libro académico. El rigor a menudo toma forma de aridez y muchas de las publicaciones que resultan de investigaciones sociales no llegan a tocar nuestras fibras, no nos mueven, no nos sacuden, cuando el propósito de la mayoría de ellas es dar a conocer procesos sociales y promover la transformación de aquellos que nos aquejan. Para ello, tocar fibras es esencial.
En la medida en que la investigación social incorpora lo cualitativo, esto puede ser diferente. Las técnicas cualitativas de investigación como la entrevista a profundidad y el trabajo con otro tipo de fuentes no tan comunes, como la fotografía, pueden tener muchas bondades, como también tienen sus dificultades y limitaciones; pero está claro que entre esas bondades, una destaca justo a la hora de presentar los resultados de estudio.
Este tipo de trabajo es el que podemos encontrar en Historias compartidas Ejido Carlos Cano Cruz, una publicación cuya narración se va tejiendo a partir de los testimonios de muchos protagonistas de la migración interna del siglo XX en Campeche, paciente y laboriosamente recopilados por Javier Villegas y Adriana Solís durante varios años.
Tendencias de la investigación del cacao: oportunidades para la investigación en Santo Domingo de los Tsáchilas
Authors: García Vidal Gelmar , Guzmán Vilar Laritza , Pérez Campdesuñer Reyner 
Published: April 2019

El cultivo del cacao está muy ligado a aspectos económicos, históricos y socioculturales del Ecuador. El contexto en que se desarrolla el estudio es Santo Domingo de los Tsáchilas, teniendo en cuenta su importancia en la producción del cacao. En relación con esta localidad, se realizó una búsqueda en las bases de datos de diversas IES del país y se analizaron los trabajos de titulación encontrados que estudiaron algún aspecto del cacao. También se analizaron las publicaciones alojadas en Scopus que abordaban algún aspecto del cacao, todo lo anterior con el objetivo de identificar oportunidades de investigación y publicación en lo referente al cacao. La información recopilada de las fuentes antes mencionadas fue sometida a análisis univariado de frecuencias y porcentajes presentados a través de gráficas; específicamente para lo relacionado con los trabajos de titulación se utilizó el análisis de redes sociales a través de UCINET 6 for Windows. De forma general, se identificaron las cantidades de artículos publicado en los últimos 5 años y trabajos de titulación defendidos; autores, instituciones y países líderes en la investigación del cacao; áreas de mayor concentración de la investigación; líderes científicos; temas más investigados; así como, países a los que se ha pretendido exportar cacao desde el territorio analizado. Con este trabajo se puede concluir que existe un espacio investigativo en Santo Domingo de los Tsáchilas en lo relacionado con el cacao que puede ser aprovechado en función de mejorar la visibilidad de este producto en el contexto internacional.
Propuesta de un modelo para el diseño de las estrategias como resultado científico en las investigaciones pedagógicas
Authors: Peña Fernández Juan Miguel , León Flores Norma Maribel , Guillén Clemente Carmen Del Pilar , Vallejo Becerril Teresa Azucena 
Published: April 2019

En esta investigación, se da repuesta a las limitaciones existentes en la utilización de la estrategia como parte de los resultados científicos de los trabajos de titulación, que se desarrollan en el área de ciencias pedagógicas en las diferentes IES del país, lo que impide la generalización de estos resultados en las diferentes instituciones educativas de educación inicial, básica y el bachillerato. Es por ello que los autores de esta investigación decidieron realizar este estudio descriptivo, para el diseño del modelo se emplearon métodos del nivel teórico analítico- sintético, inductivo deductivo, la modelación y el sistémico estructural funcional. Para el diseño del modelo propuesto para la elaboración de las estrategias como resultado científico en las investigaciones pedagógicas, se revisaron 500 tesis de grado y de maestría, que reposan en repositorios digitales de las unidades de titulación de las IES de nuestro país. El aporte teórico de esta investigación radica, en la propuesta del modelo para el diseño de la estrategia como resultado científico en el área de ciencias pedagógicas, que contribuye a elevar la calidad de los trabajos de titulación en el área de ciencias pedagógicas, el que fie avalado mediante el criterio de expertos en el tema, con un 99.9 % de confiabilidad.
O CURRÍCULO PARA A PRIMEIRA INFÂNCIA E IDENTIDADE RACIAL DA CRIANÇA E NEGRA
Authors: Silva Tarcia Regina , Dias Adelaide Alves , Amorim Ana Luisa Nogueira de 
Published: April 2019

A cor para as crianças e negras tem se constituído em um elemento de exclusão, desde a creche. As pesquisas nos permitem inferir que ainda são poucas escolas que oportunizam práticas pedagógicas que ofertam elementos para que as crianças e negras construam positivamente a sua identidade, tendo orgulho do seu pertencimento racial. Mas, as poucas propostas pedagógicas e intervenções dos pesquisadores que têm assumido esse papel desestabilizando a colonialidade do saber têm fortalecido as formas de as crianças vivenciarem a questão racial. Nesse sentido, esse artigo tem como objetivo apontar alguns caminhos que podem favorecer a construção da identidade das crianças e negras no ambiente da creche. Elucidamos que o termo raça, nessa pesquisa, é compreendido como uma construção social, política e cultural fruto de relações sociais desiguais de poder. Dessa maneira, partimos do princípio que as propostas educacionais precisam trazer para a sua centralidade a diferença possibilitando que as crianças desde a mais tenra idade possam respeitá-las bem como, celebrá-las. Logo, o/a educador/a tem um papel fundamental nesse processo, entretanto também destacamos que essa é uma questão que precisa ser assumida pelas escolas e redes municipais de educação, possibilitando desde a primeira infância que as crianças e negras possam construir positivamente a sua identidade.
Hubungan Karakteristik Pelaku Utama Perikanan dengan Kebutuhan Materi Penyuluhan Perikanan (Studi Kasus di Kabupaten Purbalingga Provinsi Jawa Tengah
Authors: Hanan Abdul , Sinaga Walson H , Nurmalia Nayu 
Published: April 2019

Beberapa faktor internal pembudidaya ikan di Kabupaten Purbalingga seperti tingkat kekosmpolitan dan tingkat keinovatifan merupakan karakteristik yang sangat berkorelasi dengan tingkat kebutuhan para pembudidaya terhadap kebutuhan informasi penyuluhan perikanan. Karateristik tersebut yang sangat membantu kreatifitas penyuluh perikanan dalam menyiapkan materi penyuluhan perikanan. Totok Mardikantoro (1991) membedakan ada tiga macam materi penyuluhan berdasarkan sifatnya yaitu: 1) Yang berisikan pemecahan masalah yang sedang dan akan dihadapi, materi yang berisikan pemecahan masalah merupakan kebutuhan utama yang diperlukan oleh pelaku utama perikanan sebagai sasaran penyuluhan. Oleh karena itu, dalam setiap kegiatan penyuluhan, materi ini harus diutamakan terlebih dahulu sebelum materi-materi yang lainnya; 2) Yang berisikan petunjuk atau rekomendasi, yang harus dilaksanakan materi penyuluhan yang berupa petunjuk/rekomendasi yang harus dilaksanakan, sering kali sangat diharapkan oleh masyarakat sasaran, meskipun kurang memperoleh prioritas dibandingkan materi yang berisi pemecahan masalah. Karena itu materi ini hanya dibatasi pada petunjuk/rekomendasi yang harus segera dilaksanakan; 3) Materi yang bersifat instrumental. Materi penyuluhan seperti ini tidak harus dikonsumsi dalam waktu cepat, tetapi merupakan materi yang perlu diperhatikan dan mempunyai manfaat jangka panjang. Apapun materi penyuluhan yang disampaikan oleh seorang penyuluh, pertama-tama harus diingat bahwa materi tersebut harus selalu mengacu kepada kebutuhan yang telah dirasakan oleh masyarakat sasarannya. Keragaman sasaran yang dihadapi menjadi kendala bagi penyuluh dalam menentukan materi penyuluhan.
Hubungan Pengetahuan, Pendidikan dan Dukungan Keluarga dengan Pemberian ASI Eksklusif
Authors: Lindawati Revi 
Published: April 2019

ASI merupakan sumber gizi yang sangat ideal dengan komposisi yang seimbang dan disesuaikan dengan kebutuhan pertumbuhan bayi. Berdasarkan data SDKI 2012, bayi yang menyusui eksklusif sampai 6 bulan yaitu sebesar 42 persen. Penyebab utama adalah rendahnya pengetahuan ibu dan kurangnya dukungan keluarga dalam pemberian ASI. Desa Peucangpari adalah salah satu desa di wilayah kerja Puskesmas Cigemblong Kabupaten Lebak Banten yang cakupan pemberian ASI eksklusif masih rendah, yaitu hanya sebesar 11,9%. Tujuan penelitian ini untuk mengetahui hubungan pengetahuan, pendidikan dan dukungan keluarga dengan pemberian ASI eksklusif. Penelitian ini bersifat korelasi dengan pendekatan cross sectional. Populasi dalam penelitian ini adalah ibu yang memiliki bayi usia 6-24 bulan di Desa Peucangpari Kecamatan Cigemblong Lebak sebanyak 42 orang, sampel penelitian diambil dengan menggunakan teknik total populasi. Hasil penelitian menunjukkan ada hubungan antara pengetahuan, pendidikan, dan dukungan keluarga dengan pemberian ASI eksklusif di Desa Peucangpari Kecamatan Cigemblong Lebak Tahun 2018. Peneliti menyarankan perlu memberikan pendidikan kesehatan pada seluruh masyarakat, khususnya ibu yang memiliki bayi tentang manfaat ASI eksklusif, sehingga masyarakat atau ibu yang belum memberikan ASI eksklusif pada bayinya bisa bertambah pengetahuannya dan akan memberikan ASI eksklusif pada bayinya.
Political Systems and a Continuing Account for Elusive Peace in Republic of Macedonia
Authors: Gurra Hyreme 
Published: April 2019

This research paper is going to elaborate the five most common political systems of the world and the second part of the mainstream headlines preoccupying the public opinion, which continued the saga for entire population of Republic of Macedonia. The country is internationally known as FYROM, and its government as a whole in the recent days after New Year’s Holidays of 2018 was expecting an act of resignation by the Prime minister Nikolla Gruevski and a massive unrest took place by NGO asking to close factories that were polluting the air. The leading political parties of the government consisting of VMRO (IMRO) (ethnic Macedonian political party) and BDI (DUI) (ethnic Albanian political party) were in the verge of a complete breakdown. These two coalition members were accused by the opposition political party LSDM (SDUM) (left party) for a great number of scandals; corruption, leading autocratic zests policy, not enjoying EU and NATO, spending public money in non-productive means and finally the phone tapping become sources of constant conflict. Social dialogue between the position and opposition was undermined by the head of the government, considered as a roguishly human hobble. The deterioration of the already unfavorable international position of the country endangered the progress leading up to national an interethnic cleansing. These events eventually would shape the future of the state. After the elections the government changed the leading stream, which is seen as a last chance for survival.
The research methods being used throughout this paper are; the method of interview, narrative method, qualitative and quantitative method.
Scattering Study of Pulsars below 100 MHz Using LWA1
Authors: Bansal K. , Taylor G. B. , Stovall Kevin , Dowell Jayce 
Published: April 2019

Abstract
Interstellar scattering causes pulsar profiles to grow asymmetrically, thus affecting the pulsar timing residuals, and is strongest at lower frequencies. Different interstellar medium models predict different frequency (ν) and dispersion measure (DM) dependencies for the scattering timescale τ
sc. For Gaussian inhomogeneity the expected scaling relation is

, while for a Kolmogorov distribution of irregularities, the expected relation is

. Previous scattering studies showed a wide range of scattering index across all ranges of DM. A scattering index below 4 is believed to be either due to limitations of the underlying assumptions of the thin-screen model or an anisotropic scattering mechanism. We present a study of scattering for seven nearby pulsars (DM < 50 pc cm−3) observed at low frequencies (10–88 MHz), using the first station of the Long Wavelength Array. We examine the scattering spectral index and DM variation over a period of about three years. The results yield insights into the small-scale structure of the interstellar medium, as well as the applicability of the thin-screen model for low-DM pulsars.
Evidence of Interacting Elongated Filaments in the Star-forming Site AFGL 5142
Authors: Dewangan L. K. , Ojha D. K. , Baug T. , Devaraj R. 
Published: April 2019

Abstract
To probe the ongoing physical mechanism, we studied a wide-scale environment around AFGL 5142 (area ∼25 pc × 20 pc) using a multiwavelength approach. The Herschel column density (N(H2)) map reveals a massive inverted Y-like structure (mass ∼6280 M
⊙), which hosts a pair of elongated filaments (lengths >10 pc). The Herschel temperature map depicts the filaments in a temperature range of ∼12.5–13.5 K. These elongated filaments overlap each other at several places, where N(H2) > 4.5 × 1021 cm−2. The 12CO and 13CO line data also show two elongated cloud components (around −1.5 and −4.5 km s−1) toward the inverted Y-like structure, which are connected in the velocity space. First moment maps of CO confirm the presence of two intertwined filamentary clouds along the line of sight. These results explain the morphology of the inverted Y-like structure through a combination of two different filamentary clouds, which are also supported by the distribution of the cold H i gas. Based on the distribution of young stellar objects (YSOs), star formation (SF) activities are investigated toward the inverted Y-like structure. The northern end of the structure hosts AFGL 5142 and tracers of massive SF, where high surface density of YSOs (i.e., 5–240 YSOs pc−2) reveals strong SF activity. Furthermore, noticeable YSOs are found toward the overlapping zones of the clouds. All this observational evidence supports a scenario of collision/interaction of two elongated filamentary clouds/flows, which appears to explain SF history in the site AFGL 5142.
Constraining the Magnetic Field in the TeV Halo of Geminga with X-Ray Observations
Authors: Liu Ruo-Yu , Ge Chong , Sun Xiao-Na , Wang Xiang-Yu 
Published: April 2019

Abstract
Recently, the High Altitude Water Cherenkov (HAWC) collaboration reported the discovery of a TeV halo around the Geminga pulsar. The TeV emission is believed to originate from the inverse Compton scattering of pulsar-injected electrons/positrons off cosmic microwave background photons. During this time, these electrons should inevitably radiate X-ray photons via synchrotron radiation, providing a useful constraint on the magnetic field in the TeV halo. In this work, we analyze the data of XMM-Newton and Chandra, and obtain an upper limit for the diffuse X-ray flux in a 600″ region around the Geminga pulsar, which is at a level of

. By numerically modeling both the X-ray and TeV observations assuming the isotropic diffusion of injected electrons/positrons, we find that the magnetic field inside the TeV halo is required to be <1 μG, which is significantly weaker than the typical magnetic field in the interstellar medium. The weak magnetic field together with the small diffusion coefficient inferred from the HAWC observation implies that the Bohm limit of particle diffusion may probably have been achieved in the TeV halo. We also discuss alternative possibilities for the weak X-ray emission, such as the hadronic origin of the TeV emission or a specific magnetic field topology, in which a weak magnetic field and a very small diffusion coefficient might be avoided.
Constraining the Size of the Corona with Fully Relativistic Calculations of Spectra of Extended Coronae. I. The Monte Carlo Radiative Transfer Code
Authors: Zhang Wenda , Dovčiak Michal , Bursa Michal 
Published: April 2019

Abstract
The size and geometry of the X-ray-emitting corona in an active galactic nucleus (AGN) are still not well constrained. Dovčiak & Done proposed a method based on calculations assuming a point-like lamp-post corona. To perform more self-consistent calculations of energy spectra of extended coronae, we develop monk, a Monte Carlo radiative transfer code dedicated to calculations of Comptonized spectra in the Kerr spacetime. In monk we assume a Klein–Nishina scattering cross section and include all general relativistic effects. We find that for a corona located above the disk, the spectrum is not isotropic, but has harder and less luminous spectra toward observers at lower inclinations, owing to anisotropic illumination of the seed photons. This anisotropy also leads to an underestimated size for the corona if we assume it to be a point-like, isotropic source located on the rotation axis of the black hole, demonstrating the necessity for more self-consistent calculations. We also study the effect of motion and geometry of the corona on the emergent spectrum. Finally, we discuss the implication of anisotropic coronal emission for the reflection spectrum in AGNs as well as black hole X-ray binaries (BHXRBs). We find that by assuming the coronal emission to be isotropic, one may underestimate the soft excess in AGNs, and the reflection continuum and iron K fluorescent line flux in BHXRBs.
Novel Low-Temperature Stable Paraffin Inhibitors for Subsea Application
Authors: Chichak Kelly , Khandekar Chandrashekhar , Christofel Brian , Doane Joseph , Vandish Alexander 
Published: April 2019

One of the most serious flow assurance challenges encountered during oil and gas production is the deposition of paraffins on formation surfaces, flowlines, as well as on other processing equipment. Paraffin deposition can cause problems in the production system that includes blocked pipelines, lower production rates, solids-accumulation, and increased remediation time and costs.
Several thermal, mechanical, and chemical methods are used to mitigate these challenges, and, of the chemical techniques available, paraffin inhibitors are deployed to mitigate the deposition problem. Several classes of polymers have been developed into paraffin inhibitors to delay the onset of paraffin precipitation and alter the crystal morphology of the precipitated paraffin particles – these combined phenomena reduce the extent of deposition. While these polymers control wax deposition, several challenges remain for their use in both cold and deep-water environments. Many of these polymers exhibit reduced solubility in common solvents used to formulate treatment products, and, as a consequence can only be blended at low concentrations for use in harsh environments. A real demand exists for new paraffin inhibitors that have enhanced formulation-stability at much higher concentrations suitable for use under low-temperature and high pressure environmental conditions.
This paper describes the developmental work and performance evaluation of a novel series of polymers specifically developed for use in low-temperature environments.
Clustering Analysis for Improved Characterization of Carbonate Reservoirs in a Southern Iraqi Oil Field
Authors: Al-Mudhafar Watheq J , Al Lawe Erfan M , Noshi Christine I. 
Published: April 2019

Abstract
Facies prediction is an important step in reservoir characterization and modeling. Define a representative reservoir model will enhance the process of reservoir development and will optimize the economic strategies. The lack of data is a key issue in reservoir characterizations and therefore alternative approaches have to be adopted to improve the process of reservoir characterization. In this research, clustering analysis was implemented as a statistical solution to classify reservoir facies given well logs and core data in a reservoir from the south of Iraq.
In this research, data from a heterogeneous carbonate reservoir were used. The data included well log records such; GR, SP, Density, Neutron Porosity, Total Porosity, Resistivity, Induction, Shale Volume, Water Saturation, along with porosity and permeability values from core analysis. These data were integrated and analyzed through statistical tools to perform clustering analysis. The clustering analysis is an approach of finding the similarities and differences between specific groups or points in order to classify them into different classes. This concept was implemented by the use of R software, which is a quite powerful open source tool for statistical studies with variety of functions and packages. Two different clustering algorithms, K-mean approach and Calinski-Harabasz solution were used to classify reservoir facies based on the given data.
The results of this research show that the reservoir facies can be predicted through different clustering analysis when well logs records are given. K-means approach has predicted the optimal facies classification to be five, while Calinski-Harabasz technique has identified three optimal reservoir facies. The difference in facies classification between the two clustering analysis approaches is attributed to the two approaches sensitivity because of the high quality rocks in all the units of this well, which makes it challenging to identify the facies as all the layers have similer reservoir properties.
Regulatory Approaches for Wind Load Assessments of Offshore Structures
Authors: Peters William Sidney 
Published: April 2019

Abstract
The need for an accurate or at least conservative assessment of wind loads on offshore structures to ensure adequate safety is acknowledged by all stakeholders. A traditional, empirical method that uses a prescriptive approach has been accepted for many decades. Proposed designs are submitted to a regulatory body to demonstrate that requirements using this method are satisfied. A review verifies that the submission satisfies the standard. However, there are questions with respect to the accuracy of this approach that may lead to over-conservative limits in operation.
Alternatives exist to the traditional, empirical method to assess wind loads and moments on offshore structures that use both wind tunnel testing and computational fluid dynamics (CFD). Challenges to the use of the alternatives to the traditional method for wind load assessment for regulatory purposes have often pointed to a lack of demonstrable consistency or inaccuracy.
Recent work performed under the guidance of the Offshore Committee of the Society of Naval Architects and Marine Engineers has done much to answer the challenges to wind tunnel testing and CFD. However, given the expertise needed to successfully perform wind load assessments using wind tunnel testing or CFD, a traditional regulatory approach that relies on prescriptive standards for acceptance may not be practical.
This paper explores different approaches for rules or regulations that can leverage the outcomes of the recent work with sufficient reliability to assess confidently that standards are satisfied. Methods by which equivalents to prescriptive standards may be evaluated and applied in a regulatory context are discussed. Comparisons with similar approaches formulated for use in other maritime fields are also examined.