bluuebunny/crossref_metadata_2025 huggingface dataset:
Uma lanterna bruxuleante: a representação da UDN durante a criação da Petrobras na grande imprensa carioca (1952-1953)
Authors: Martins Luis Carlos dos Passos , Costa Thiago
Published: November 2017

Este trabalho pretende discutir a forma como alguns jornais cariocas representando diferentes matizes ideológicas (Correio da Manhã, Diário de Notícias e Última Hora) representaram o papel da União Democrática Brasileira (UDN) no processo de criação da Petrobras (1951-1953). Este tema se justifica pela sinuosa e surpreendente postura do partido no processo, que oscilou desde a defesa da “Campanha O Petróleo É Nosso” até a tentativa de implantar um modelo liberal de exploração petrolífero no país, passando pela proposta de fundação de uma empresa pública para o setor (ENAPE). Dessa forma, esta questão oferece uma boa oportunidade para testar algumas hipóteses sobre a relação entre a imprensa e a política no período, especialmente no que se refere à interpretação que afirma que os jornais ditos “liberais” eram invariavelmente udenistas e antivarguistas.
Impact of Intellectual Capital Management and Human Capital Circulation on Business Practice at Macro- and Micro Level
Authors: Oleynikova Iryna , Balabaniuk Zhanna
Published: November 2017

Nowadays the main potential for growth comes from the ability to innovate and succeed with breakthrough ideas. However, despite growing importance of the subject matter, there are still no standard practices that would perform such a measurement and employ tendencies of human capital circulation. Various attempts have been made over recent years, but none have achieved general acceptance among experts in the business field. Although there is no universally accepted theory, each has its own strengths and weaknesses in the deriving approximate value of intellectual capital for various companies. In this work, we looked over some theories that have been suggested to estimate intellectual capital and analyzed data from Ukrainian IT companies in order to prove how important measurement of intellectual capital and human capital circulation trends to allow for much better representation of an organizationâ€™s competitive position. Additionally, the impact of intellectual capital on various Key Performance Indicators, such as Economic Value Added and Weighted Average Cost of Capital, was examined with supporting financial analysis performed. The paper concludes with an overview of methodological and managerial implications of the research, theoretical and practical limitations and possible improvements, and considerations for further research in the field of study.
Do dividend shocks affect excess returns? An experimental study
Authors: Draganac Dragana
Published: November 2017

The dividend announcement of a company is an informational event that can
cause underreaction, momentum, overreaction, post-dividend announcement
drift, and mean reversion. It is the uncertainty surrounding dividend
announcements that leads to such behavioural phenomena. Most authors consider
that underreaction occurs after dividend shocks because new information about
the dividend is being slowly and gradually built into the stock price. The
effect of dividend shocks is often reflected in excess returns, which can
last up to one year after the shock. The experiment described in this paper
tests whether statistically significant excess returns are realized after a
shock dividend announcement. Participants trade with the stocks of two
companies, which only differ by dividend-generating stochastic process. The
dividend process of Company 2 is a Merton-style jump-diffusion process
(consisting of two parts: Brownian motion and Poisson jump), while the
dividend process of Company 1 contains only the Brownian motion component.
Statistically significant excess returns are expected when trading with
Company 2 stocks. An autoregressive model is applied in order to test this
hypothesis. The conclusion is that a dividend shock is followed by
statistically significant excess returns in 20 of the 22 experiments, which
implies that markets are inefficient after sudden and large changes in
dividends. Underreaction and discount rate effects are identified.
Analysis of fuel rejuvenation times in a fusion breeder reactor fuelled with a mixture of uranium-thorium oxides for the CANDU reactor
Authors: Bakir Gizem , Yapici Huseyin
Published: November 2017

This study presents the determination of fuel rejuvenation times in a D-T
fusion breeder reactor fuelled with a mixture of natUO2 and ThO2 for
multi-reuse of nuclear fuels in CANDU-37 reactors. To determine the effect of
thorium on the fuel enrichment and rejuvenation times, neutronic analyses are
performed by increasing the percentage of ThO2 in the fuel mixture from 10 to
35. The time-dependent neutronic calculations are carried out in three
stages. In the first stage, which is the fuel enrichment or rejuvenation
process in the fusion breeder reactor, the subcritical calculations of the
fusion breeder reactor fuelled with the fuel mixtures are performed by using
the MCNPX 2.7/CINDER under a fusion neutron wall loading of 1 MWm-2,
corresponding to neutron flux of 4.444?1013 cm-2s-1 (energy of every fusion
neutron is 14.1 MeV). In the second stage, which is the thermal reactor
analysis, the fuel rods enriched at the end of the first stage are placed in
the CANDU-37 reactor, and the critical calculations of this reactor are
performed by using MCNPX 2.7 and MONTEBURNS codes separately. The numerical
results show that the neutronic values obtained from both codes are very near
each other. The third stage is the two-year cooling process of CANDU spent
fuels. The values obtained by numerical calculations show that this fusion
breeder reactor is self-sufficient in terms of tritium and has a high
performance in terms of energy multiplication as well as fuel rejuvenation
and thorium utilization.
Radiation shielding and gamma ray attenuation properties of some polymers
Authors: Bhosale Rameshwar , More Chaitali , Gaikwad Dhammajyot , Pawar Pravina , Rode Madhav
Published: November 2017

In the present work we investigated the gamma radiation parameters as mass
attenuation coefficients ?/?, the total atomic scattering cross-sections ??,
the electronic scattering cross-sections se, the effective atomic numbers
Zeff, and the effective electron densities Neff for some polymers such as
polyoxymethylene (CH2O), poly acrylonitrile (C3H3N), natural rubber (C5H8),
poly ethyl acrylate (C5H8O2), polyphenyl methacrylate (C10H10O2), and
polyethylene tetraphthalate (C10H8O4). The gamma ray photons were detected by
NaI(Tl) detector with resolution of 8.2 % at 662 keV, using radioactive gamma
ray sources 57Co, 133Ba, 137Cs, 54Mn, 60Co, and 22Na at energies 122, 356,
511, 662, 840, 1170, 1275, and 1330 keV. Values of ?/? for the chosen
polymers decrease with increasing energy. The results of investigated data
are useful in plastic industry, building materials, agriculture fields
radiation shielding, accelerator centers, polymer industry, medical field,
etc.
Numerical study of heat transfer enhancement due to the use of fractal-shaped design for impingement cooling
Authors: Cai Lin , Liu Zhuo , Gao Jianshu , Liu Xiao
Published: November 2017

This paper describes a numerical analysis of a heat transfer enhancement
technique that introduces fractal-shaped design for impingement cooling.
Based on the gas turbine combustion chamber cooling, a fractal-shaped nozzle
is designed for the constant flow area in a single impingement cooling
model. The incompressible Reynolds-averaged Navier-Stokes equations are
applied to the system using CFD software. The numerical results are compared
with the experiment results for array impingement cooling.
Temperature field distribution of coal seam in heat injection
Authors: Zhang Zhizhen , Peng Weihong , Shang Xiaoji , Wang Kun , Li Heng , Ma Wenming
Published: November 2017

In this article, we present a natural boundary element method (NBEM) to solve
the steady heat flow problem with heat sources in a coal seam. The boundary
integral equation is derived to obtain the temperature filed distribution of
the coal seam under the different injecting conditions.
Analytical solutions of linear diffusion and wave equations in semi-infinite domains by using a new integral transform
Authors: Gao Lin , Cai Chengzheng , Hou Peng
Published: November 2017

Recently, a new integral transform similar to Sumudu transform has been
proposed by Yang [1]. Some of the properties of the integral transform are
expanded in the present article. Meanwhile, new applications to the linear
wave and diffusion equations in semi-infinite domains are discussed in
detail. The proposed method provides an alternative approach to solve the
partial differential equations in mathematical physics.
An integral transform applied to solve the steady heat transfer problem in the half-plane
Authors: Xia Tongqiang , Yan Shengping , Liang Xin , Zhang Pengjun , Liu Chun
Published: November 2017

An integral transform operator U[?(t)= 1/? ???? ?(t)?-i?t dt is
considered to solve the steady heat transfer problem in this paper. The
analytic technique is illustrated to be applicable in the solution of a 1-D
Laplace equation in the half-plane. The results are interesting as well as
potentially useful in the linear heat transfer problems.
Numerical investigation of condensing flow of low pressure steam turbine at different flow rate conditions
Authors: Huang Kezhen , Cai Lin , Gao Jianshu , Liu Zhuo , Yu Xinggang
Published: November 2017

The numerical investigation on the wet steam flow in the last two stages of a
1000 MW fossil-fired low pressure steam turbine is presented in this paper.
The non-equilibrium model via the classical nucleation theory is employed to
simulate the condensing flow of the wet steam. The characteristics of the
flow filed from design condition to low volume flow condition are calculated
and the static performance of last stage moving blade is also obtained. The
development of the backflow phenomenon is clearly captured through the
analysis of the velocity triangle.
Investigation on steady and unsteady performance of a SCO2 centrifugal compressor with splitters
Authors: Guo Ding , Shi Dongbo , Zhang Di
Published: November 2017

Supercritical carbon dioxide (SCO2 ) is widely concerned with its excellent
physical properties. Its high density helps to achieve a compact mechanical
structure, especially in all kinds of turbomachinery. In this paper, a SCO2
centrifugal compressor with splitter blades is displayed and numerically
investigated. A thorough numerical analysis of the steady and unsteady
performance of this SCO2 centrifugal compressor is performed in ANSYS-CFX
with SST turbulence model. Streamlines, pressure and temperature under
steady- and unsteady-state are compared and analyzed. Moreover, the
trans-critical phenomenon at the leading edge of the rotor blade and the
aerodynamic performance are covered. The results in this paper provide the
foundation for the design and numerical investigation of SCO2 centrifugal
compressors.
Approximate solution for burgers equation with local fractional derivative by Yang-Laplace decomposition method
Authors: Chen Min , Xia Yinhong
Published: November 2017

We presented the application of local fractional Yang-Laplace decomposition
method to a local fractional Burgers equation. Our results show that the
method gives high accuracy series solutions that converge very rapidly.
A fully coupled thermo-hydro-mechanical model associated with inertia and slip effects
Authors: Xue Yi , Cao Zheng-Zheng , Cai Cheng-Zheng , Dang Fa-Ning , Hou Peng , Zhang Ji
Published: November 2017

The inertia and slip effects have a significant impact on the coal seam gas
extraction. A fully coupled thermo-hydro-mechanical model is established in
this study, which takes into account the influence of non-Darcy gas flow and
Klinkenberg effect on the coal seam deformation and coalbed methane
migration. The numerical result shows that the coalbed methane migration and
transport evolution coal bed methane reservoir is not only dependent on the
coal matrix deformation, gas pressure and gas adsorption, but also closely
related to inertia effect and slip effect.
Topological representation of the porous structure and its evolution of reservoir sandstone under excavation-induced loads
Authors: Ju Yang , Yang Yongming , Zhao Xi , Gao Feng , Song Wei , Wang Jianguo
Published: November 2017

The porous structure of a reservoir rock greatly influences its evolutive
deformation and fracture behavior during excavation of natural resources
reservoirs. Most numerical models for porous structures have been used to
predict the quasi-static mechanical properties, but few are available to
accurately characterize the evolution process of the porous structure and
its influence on the macroscopic properties of reservoir rocks. This study
reports a novel method to characterize the porous structure of sandstone
using its topological parameters and to determine the laws that govern the
evolutive deformation and failure of the topological structure under various
uniaxial compressive loads. A numerical model of the porous sandstone was
established based on the pore characteristics that were acquired using
computed tomography imaging techniques. The analytical method that
integrates the grassfire algorithm and the maximum inscribed sphere
algorithm was proposed to create the 3-D topological model of the deformed
porous structure, through which the topological parameters of the structure
were measured and identified. The evolution processes of the porous
structure under various loads were characterized using its equivalent
topological model and parameters. This study opens a new way to characterize
the dynamic evolution of the pore structure of reservoir sandstone under
excavation disturbance.
A new theoretical model for guiding the gas extraction in coal mines
Authors: Xie Jing , Zhang Zetian , Gao Mingzhong , Zhang Ru , Wang Man , Jin Wencheng , Luo Yi
Published: November 2017

Based on the fractal-percolation properties, the equivalent permeability
analysis of 3-D discrete fracture network models are investigated and
analyzed for the first time. The 3-D fractal dimension was calculated with
the 3-D fracture density, the mean major axis of fracture and the aspect
ratio of major to minor axis. The reconstructed mining-induced fracture
network model was used to validate that the correlation between the
predicted and actual results is very strong in a sense. The equivalent
permeability results can be adopted to guide the gas extraction in coal
mines.
Where next for antiepileptic therapeutic drug monitoring?
Authors: Jankovic Slobodan
Published: November 2017

nema
Phoneutrismo en Ecuador: reporte de un caso clí­nico
Authors: Peñafiel Mendoza Susana Magdalena , Tufiño Aguilar Andrea , Herrera Diego
Published: November 2017

Se presenta un caso de mordedura por Phoneutria nigriventer atendido en el Hospital Pedro Vicente Maldonado ubicado en el cantón del mismo nombre en la zona subtropical del Noroccidente de Pichincha, en el año 2017. El caso se trata de una paciente femenina de 40 años de edad la cual, mientras trabaja en tareas agrícolas sufre mordedura de araña bananera en dedo índice de mano izquierda, acudió a sala de emergencia presentando un cuadro de envenenamiento leve el cual evolucionó favorablemente. El phoneutrismo es un aracnidismo pocas veces reportado en Ecuador, debido posiblemente al sub registro de estos accidentes.

El objetivo del presente trabajo es fortalecer conocimientos y motivar a un adecuado registro, además, dar a conocer la importancia del manejo eficaz y oportuno debido a la ausencia de antídoto.
PERAN ULAMA NAHDLATUL ULAMA DALAM MENYIARKAN PAHAM KEAGAMAAN MODERAT DI PROVINSI LAMPUNG
Authors: Bahruddin Moh
Published: November 2017

Nahdlatul Ulama (NU) memiliki paham keagamaan yang tawasuth (moderat), tasamuh (tolerans), tawazun (seimbang) dan amar ma’ruf nahi munkar. Dengan doktrin yang demikian, NU senantiasa berpartisipasi aktif dalam proses pembangunan. Ulama NU Lampung memiliki peran yang sangat signifikan dalam menyebarkan paham keagamaan yang moderat di Lampung. Strategi yang ditempuh NU Lampung dalam menyiarkan paham keagamaan moderat adalah dengan membuat klasifikasi kelompok sasaran. Melalui jalur pendidikan formal dan non formal dengan sasaran utamanya adalah generasi muda. Melalui majelis-majelis thariqah yang sasaran utamanya adalah kelompok orang dewasa-tua. Melalui khutbah, ceramah, dan dakwah secara umum kepada seluruh lapisan masyarakat tanpa membedakan usia. Melalui jalur politik dengan sasaran para elit politik, birokrat dan para pelaku usaha. Melalui jalur lintas agama yang sasarannya adalah saudara sebangsa setanah air yang non muslim. Strategi yang demikian sangat efektif menyiarkan paham keagamaan yang moderat, terbukti bahwa NU Lampung mendapat julukan “Jawa Timurnya NU” di luar pulau Jawa.
El río reflejo de Medellín: cambios en la concepción de un espacio según la época
Authors: Castro Valencia Isabel , Guerra Giraldo Paulina , Loaiza Luisa Fernanda
Published: November 2017

Este artículo presenta los resultados de una investigación que buscó entender cómo ha cambiado, para los habitantes de Medellín, el significado del río de su ciudad, desde finales del siglo XIX hasta principios del XXI. Mediante un esquema conceptual fue posible estudiar distintas representaciones sociales de las personas, evidenciadas en prácticas y apropiaciones asociadas con el afluente a lo largo de tres épocas, que fueron denominadas preindustrial, industrial y postindustrial. El río ha sido considerado un referente en determinados momentos y en otros ha pasado a un total olvido. Su interacción con la ciudad ha estado permeada por el ideal de progreso de los dirigentes pertenecientes a la élite de cada época, lo cual ha influido en él de diversas maneras y ha generado repercusiones económicas, sociales, ambientales e infraestructurales.
Clinical and histologic features of acute-onset erythroderma in dogs with gastrointestinal disease: 18 cases (2005–2015)
Authors: Cain Christine L. , Bradley Charles W. , Mauldin Elizabeth A.
Published: November 2017

OBJECTIVE To describe the clinical and histologic features of acute erythroderma in dogs with gastrointestinal disease.

DESIGN Retrospective case series.

ANIMALS 18 dogs with erythroderma and gastrointestinal disease.

PROCEDURES Medical records and biopsy specimens were reviewed. Information collected from medical records included signalment, clinical signs, physical examination and diagnostic test results, treatment, and outcome. The Naranjo algorithm was used to estimate the probability of an adverse drug reaction for each dog.

RESULTS All dogs had an acute onset of erythematous macules or generalized erythroderma. Histologic features of skin biopsy specimens had 3 patterns representing a progressive spectrum of inflammation. Most dogs had vomiting (n = 17) and hematochezia (10). Signs of gastrointestinal disease became evident before, after, or concurrent with the onset of skin lesions in 10, 3, and 5 dogs, respectively. Inflammatory bowel disease, pancreatitis, and adverse food reaction were diagnosed in 5, 3, and 3 dogs, respectively. The cause of the gastrointestinal signs was not identified for 8 dogs. Eight dogs had a Naranjo score consistent with a possible adverse drug reaction. Treatment of skin lesions included drug withdrawal (n = 15), antihistamines (16), and corticosteroids (14). Signs of gastrointestinal disease and skin lesions resolved at a mean of 4.6 days and 20.8 days, respectively, after onset.

CONCLUSIONS AND CLINICAL RELEVANCE Results indicated acute erythroderma may be associated with > 1 gastrointestinal disease or an adverse drug reaction in some dogs. Recognition of the clinical and histologic features of this syndrome is essential for accurate diagnosis.
HIPERPLASIA EPITELIAL FOCAL: UMA REVISÃO DE LITERATURA NARRATIVA
Authors: Rosa Beatriz De Melo Curvina , Azevedo Jacqueline Vitória do Nascimento , Cutrim Nicolle Santos Silva , Costa Cyrene Piazera Silva
Published: November 2017

O objetivo deste estudo foi descrever a doença Hiperplasia Epitelial Focal (HEF), caracterizando sua aparência e o seu diagnóstico, a partir de uma revisão de literatura. A HEF afeta mais as meninas. Clinicamente, essa doença apresenta-se como nódulos e/ou pápulas múltiplas de coloração igual da mucosa normal localizados lábios, mucosa jugal e língua. Esta doença está diretamente relacionada com a infecção pelo Papiloma Vírus Humano sendo relacionada no contexto do abuso sexual infantil. E por fim, para que o diagnóstico da HEF possa ser feito, o cirurgião dentista deve estar atento ao exame clínico e aos dados sócio-demográficos do paciente, junto com exames histológicos e o tipo de HPV. Portanto, é importante conhecer tal patologia. PALAVRAS-CHAVE: Hiperplasia epitelial focal. Doença de Heck. Papiloma vírus Humano (HPV).
Extensão universitária: uma perspectiva de acadêmicos da área da saúde
Authors: Caixeta Karine Braz Souza , Firmo Wellyson Da Cunha Araújo
Published: November 2017

Universidade é sustentada por ensino, pesquisa e extensão. Estas funções devem ser equivalentes e ter total importância nas instituições de ensino superior. O objetivo deste trabalho é verificar o conhecimento e a perspectiva de graduandos da área da saúde de uma faculdade particular do Maranhão sobre a prática de extensão universitária. Foram coletadas informações de 100 estudantes da área da Saúde durante o mês de dezembro de 2015. Os alunos responderam questões objetivas sobre a prática de extensão universitária já realizada no âmbito da faculdade. Mais da metade dos entrevistados afirmaram já ter realizado algum trabalho de extensão universitária na instituição. No entanto, grande parte realizou o trabalho de extensão em poucas disciplinas. Isso vem alertar sobre a importância do incentivo desse tipo de atividade por parte dos docentes e por toda a direção acadêmica. O estudo realizado nesta faculdade particular mostra que ainda há uma longa trajetória a ser percorrida pelas universidades em relação à extensão universitária. Palavras-chave: Extensão universitária, saúde, Maranhão.
Apropiación de estrategias pedagógicas y didácticas en los procesos de enseñanza- aprendizaje en los profesores que incorporan las TIC en el programa tecnología informática, UNIMINUTO, centro regional Soacha —CRS—
Authors: Colmenares Montero Leydy Viviana
Published: November 2017

La investigación describe cómo los docentes del programa Tecnología Informática de la UNIMINUTO —CRS—, apropian las estrategias pedagógicas y didácticas en los procesos de enseñanza-aprendizaje, utilizando como medio las TIC. Se trabajó desde el método de investigación-acción, con un enfoque cualitativo, dirigido a una muestra de seis docentes. Los resultados sugieren que los profesores del programa incorporan y apropian las estrategias basados en su formación académica y experiencia, e identifican fortalezas sobre la interacción de los estudiantes con las estrategias propuestas y debilidades del proceso respecto a las limitaciones de infraestructura tecnológica.
Termoelectricidad: uso de las celdas peltier en el campo de la refrigeración y sus principales aplicaciones
Authors: Rubio Ramírez Cristian , Lizarazo Guillermo Martheyn , Vera Duarte Emilio
Published: November 2017

En este artículo se señala la importancia que han tenido las celdas Peltier en el desarrollo tecnológico e industrial, demostrando, desde un punto de vista científico y matemático, su funcionamiento, los elementos que las componen y el cómo son aprovechadas de forma eficiente mediante el análisis crítico de todos los estudios que tienen como punto focal la termoelectricidad. Se compara el esquema investigativo elaborado hasta la actualidad —correspondiente a las celdas Peltier en el campo de la refrigeración—, organizado por segmentos de texto en los que se explica de manera teórica el funcionamiento y se destaca la producción de algunos modelos matemáticos.
PERSILANGAN JAMUR TIRAM COKELAT (PLEUROTUS CYSTIDIOSUSY) DENGAN JAMUR TIRAM ABU-ABU (PLEUROTUS GREY OYSTER) MENGGUNAKAN METODE FUSI MISELIUM MONOKARION
Authors: Jakiyah Evi , Hasanah Hasni Ummul , Rikhma Sari Dwi Nur
Published: November 2017

Pleurotus cytidiosusy memiliki keunggulan daya tahan lama, tekstur tubuh yang tebal dan kadar air sedikit. Sedangkan Pleurotus greyoyster memiliki keunggulan daya tahan lama, bentuk tubuh lebar dan juga kadar air sedikit. Produksi budidaya jamur yang baik dapat dicapai apabila kandungan air sedikit sehingga daya tahan jamur lama. Untuk mendapatkan varietas unggul dari kedua spesies jamur, maka perlu dilakukan persilangan menggunakan metode fusi miselium monokarion. Tujuan penelitian ini untuk mengetahui apakah metode fusi miselium monokarion dapat digunakan untuk persilangan Pleurotus cytidiosusy dengan Pleurotus greyoyster. Tahap awal dalam penelitian ini yaitu pembibitan, kemudian dilanjutkan persilangan menggunakan metode fusi miselium monokarion hingga terbentuk zona kontak kedua miselium dan struktur sambungan apit. Hasil penelitian menunjukkan bahwa metode fusi miselium monokarion dapat digunakan untuk persilangan Pleurotus cytidiosusy dengan Pleurotus greyoyster yang ditandai dengan zona kontak miselium secara makroskopik, sedangkan secara mikroskopik terdapat struktur sambungan apit. Karakteristik miselium hasil persilangan (dikarion) terlihat berlekatan atau menyatu, tidak merata dan lebih halus. Pertumbuhan miselium dikarion lebih cepat dibandingkan miselium monokarion. Kata kunci : Pleurotus cystidiosusy, Pleurotus Greyoyster, Fusi Miselium Monokarion
Management of Non-vital Maxillary Central Incisors with Open Apices by MTA Plugging
Authors: Sheikh Md Abdul Hannan , Shaikh Abdul Kader , Kamrunnahar - , Parveen Sultana
Published: November 2017

The major challenge of performing root canal treatment in an open apex pulp-less tooth is to obtain a good apical seal. An 11 year old boy was presented with pain in his upper anterior teeth. On clinical examination both the maxillary central incisors revealed slight discoloration and fracture of the crown. Radiographic evaluation revealed radiolucency and open apices of both central incisors. Apexification with MTA apical plug was carried out before obturation with gutta-percha and sealer and the treatment was completed within 3 consecutive appointments. In twelve months follow up both the teeth were clinically and radiographically asymptomatic and the healing of the apical area was continued. The positive clinical outcome may encourage the future use of mineral trioxide aggregate (MTA) as an apical plug material in case of non-vital open apex teeth.J Bangladesh Coll Phys Surg 2017; 35(4): 196-199
A Young Female with Pain and Weakness of Lower Limb
Authors: Reza Ishrat Binte , Hossain Homayra Tahseen , Zarin Esrat , Miah Titu , Alam SA Nurul , Ahasan HAM Nazmul
Published: November 2017

Abstract not availableJ Bangladesh Coll Phys Surg 2017; 35(4): 200-201
A Multi-Source Early Warning System of MEMS Based Wireless Monitoring for Rainfall-Induced Landslides
Authors: Yang Zongji , Shao Wei , Qiao Jianping , Huang Dong , Tian Hongling , Lei Xiaoqin , Uchimura Taro
Published: November 2017

Landslide monitoring and early warning systems are the most successful countermeasures to reduce fatalities and economic losses from landslide hazards. The traditional strategies such as GPS and extensometers are relatively expensive and difficult to be installed in steep, high mountains. In this study, a MEMS (Micro Electro Mechanical Systems) based multivariate wireless monitoring sensor unit was used to build a monitoring and early warning system for rainfall-triggered landslides, as one of the most practical and cost-effective countermeasures for hard-reached mountains. The multi-source wireless monitoring system and its well-developed equipment were tested in a landslide-prone slope to monitor the triggering of landslides and debris flows in the Wenchuan earthquake region, China. The variations of several state variables were observed, including the soil moisture content, soil matric suction, rainfall, inclination and ground vibration. The results of a slope stability analysis were benchmarked with the in situ measurements to identify the multivariate early warning parameters for rainfall-induced landslides. The proposed early warning system for the slope stability analysis can provide a more accurate prediction for rainfall-induced landslides and debris flows in earthquake hit regions.
Synthesis and Features of Luminescent Bromo- and Iodohectorite Nanoclay Materials
Authors: Santos Hellen , Norrbo Isabella , Laihinen Tero , Sinkkonen Jari , Mäkilä Ermei , Carvalho José , Damlin Pia , Brito Hermi , Hölsä Jorma , Lastusaari Mika
Published: November 2017

The smectites represent a versatile class of clay minerals with broad usage in industrial applications, e.g., cosmetics, drug delivery, bioimaging, etc. Synthetic hectorite Na0.7(Mg5.5Li0.3)[Si8O20](OH)4 is a distinct material from this class due to its low-cost production method that allows to design its structure to match better the applications. In the current work, we have synthesized for the first time ever nanoclay materials based on the hectorite structure but with the hydroxyl groups (OH−) replaced by Br− or I−, yielding bromohectorite (Br-Hec) and iodohectorite (I-Hec). It was aimed that these materials would be used as phosphors. Thus, OH− replacement was done to avoid luminescence quenching by multiphonon de-excitation. The crystal structure is similar to nanocrystalline fluorohectorite, having the d001 spacing of 14.30 Å and 3 nm crystallite size along the 00l direction. The synthetic materials studied here show strong potential to act as host lattices for optically active species, possessing mesoporous structure with high specific surface area (385 and 363 m2 g−1 for Br-Hec and I-Hec, respectively) and good thermal stability up to 800 °C. Both materials also present strong blue-green emission under UV radiation and short persistent luminescence (ca. 5 s). The luminescence features are attributed to Ti3+/TiIV impurities acting as the emitting center in these materials.
Molecular Screening of 43 Brazilian Families Diagnosed with Leber Congenital Amaurosis or Early-Onset Severe Retinal Dystrophy
Authors: Porto Fernanda , Jones Evan , Branch Justin , Soens Zachry , Maia Igor , Sena Isadora , Sampaio Shirley , Simões Renata , Chen Rui
Published: November 2017

Leber congenital amaurosis (LCA) is a severe disease that leads to complete blindness in children, typically before the first year of life. Due to the clinical and genetic heterogeneity among LCA and other retinal diseases, providing patients with a molecular diagnosis is essential to assigning an accurate clinical diagnosis. Using our gene panel that targets 300 genes that are known to cause retinal disease, including 24 genes reported to cause LCA, we sequenced 43 unrelated probands with Brazilian ancestry. We identified 42 unique variants and were able to assign a molecular diagnosis to 30/43 (70%) Brazilian patients. Among these, 30 patients were initially diagnosed with LCA or a form of early-onset retinal dystrophy, 17 patients harbored mutations in LCA-associated genes, while 13 patients had mutations in genes that were reported to cause other diseases involving the retina.
Transcriptional and Hormonal Regulation of Weeping Trait in Salix matsudana
Authors: Liu Juanjuan , Zeng Yanfei , Yan Pengcheng , He Caiyun , Zhang Jianguo
Published: November 2017

Salix matsudana is a large and rapidly-growing tree, with erect or spreading branchlets (upright willow). However, S. matsudana var. pseudomatsudana is one of the varietas, with pendulous branchlets (weeping willow). It has high ornamental value for its graceful pendulous branches. In order to study the molecular basis for this weeping trait, leaves and stems collected at different developmental stages were analyzed using RNA-seq coupled with digital gene expression. Although weeping trees are used worldwide as landscape plants, little is known about the genes that control weeping. Our growth results indicated that branches in weeping willow developed and elongated throughout all developmental stages, but branches in upright willow grew rapidly in the initial stages and then grew slowly and began shoot branching in the middle stages. A total of 613 hormone-related genes were differentially expressed in willow development. Among these, genes associated with auxin and gibberellin (GA) were highly likely to be responsible for the weeping trait, and genes associated with auxin and ethylene probably play crucial roles in shoot elongation. The genes with differential expression patterns were used to construct a network that regulated stem development, and auxin-related genes were identified as hub genes in the network in the weeping willow. Our results suggest an important role of gibberellin and auxin in regulating the weeping trait in Salix matsudana. This is the first report on the molecular aspects of hormonal effects on weeping trait in willow using transcriptomics and helps in dissecting the molecular mechanisms by which the weeping trait is controlled.
Hot-Dip Aluminizing on AISI F55–UNS S32760 Super Duplex Stainless Steel Properties: Effect of Thermal Treatments
Authors: Ciuffini Andrea , Barella Silvia , Di Cecca Cosmo , Gruttadauria Andrea , Mombelli Davide , Mapelli Carlo
Published: November 2017

The behavior of super duplex stainless steels AISI F55-UNS S32760 in hot-dip aluminizing process has been studied, investigating the influence of cold working and of different initial microstructures obtained through a preliminary thermal treatment. The microstructural features examined are the secondary austenite precipitation, the static recovery of ferrite and the thermal dissolution of austenite within ferritic matrix. The hot-dip aluminizing temperature has been optimized through sessile drop tests. The treatment has been performed at 1100 °C for 300 s, 900 s and 2700 s. A strong chemical interaction occurs, generating intermetallic compounds at the interface. Molten aluminum interacts exclusively with the ferritic phase due to its much higher diffusivity in this phase coupled with its marked ferrite-stabilizer behavior. Thus, the influence of cold working is not remarkable, since the strains are mainly allocated by austenitic phase. The diffusivity of aluminum increases due to lattice defects thermally generated and, mainly, to influence given by grain boundaries, multiplied by secondary austenite precipitation, which act as short-circuit diffusion paths. Ni and Cr contents in the ferritic matrix have an influence but not highly relevant. Then, the best starting condition of the super duplex stainless steel substrates, to obtain a thick interfacial layer, are the thermal annealing at 1080 °C for 360 s/mm after a solution thermal treatment at 1300 °C for 60 s/mm.
Mineral Sequestration of Carbon Dioxide in Circulating Fluidized Bed Combustion Boiler Bottom Ash
Authors: Kim Hee-Jeong , Lee Haeng-Ki
Published: November 2017

This paper investigates the mineral sequestration of carbon dioxide in circulating fluidized bed combustion (CFBC) boiler bottom ash. CFBC bottom ash, which originated from two sources, was prepared along with pulverized coal-fired (PC) boiler bottom ash as a control. These ashes were exposed to accelerated carbonation conditions at a relative humidity of 40% and 100%, in order to investigate the effects of humidity on the carbonation kinetics of the bottom ash. The obtained results showed that not only lime but other calcium-bearing phases (gehlenite, wollastonite, and brownmillerite) in CFBC bottom ash participated in the mineral carbonation reaction. In particular, these phases underwent hydration in a wet carbonation environment, whereby the carbon dioxide uptake and capacity of CFBC bottom ash are significantly enhanced. This study may have important implications, demonstrating the feasibility of carbon dioxide sequestration and recycling of CFBC boiler bottom ash.
Nanoparticle/Metal–Organic Framework Composites for Catalytic Applications: Current Status and Perspective
Authors: Xiang Wenlong , Zhang Yueping , Lin Hongfei , Liu Chang-jun
Published: November 2017

Nanoparticle/metal–organic frameworks (MOF) based composites have recently attracted significant attention as a new class of catalysts. Such composites possess the unique features of MOFs (including clearly defined crystal structure, high surface area, single site catalyst, special confined nanopore, tunable, and uniform pore structure), but avoid some intrinsic weaknesses (like limited electrical conductivity and lack in the “conventional” catalytically active sites). This review summarizes the developed strategies for the fabrication of nanoparticle/MOF composites for catalyst uses, including the strategy using MOFs as host materials to hold and stabilize the guest nanoparticles, the strategy with subsequent MOF growth/assembly around pre-synthesized nanoparticles and the strategy mixing the precursors of NPs and MOFs together, followed by self-assembly process or post-treatment or post-modification. The applications of nanoparticle/MOF composites for CO oxidation, CO2 conversion, hydrogen production, organic transformations, and degradation of pollutants have been discussed. Superior catalytic performances in these reactions have been demonstrated. Challenges and future developments are finally addressed.
Low Prevalence of Enzootic Equine Influenza Virus among Horses in Mongolia
Authors: Sack Alexandra , Daramragchaa Ulziimaa , Chuluunbaatar Maitsetseg , Gonchigoo Battsetseg , Bazartseren Boldbaatar , Tsogbadrakh Nyamdorj , Gray Gregory
Published: November 2017

Horses are critically important for Mongolian herders’ livelihoods, providing transportation and food products, and playing important cultural roles. Equine influenza virus (EIV) epizootics have been frequent among Mongolia’s horses, with five occurring since 1970. We sought to estimate the prevalence for EIV infection among horses and Bactrian camels with influenza-like illness between national epizootics. In 2016–2017, active surveillance for EIV was periodically performed in four aimags (provinces). Nasal swabs were collected from 680 horses and 131 camels. Seven of the horse swabs were “positive” for qRT-PCR evidence of influenza A (Ct value ≤ 38). Two more were “suspect positive” (Ct value > 38 and ≤ 40). These nine specimens were collected from four aimags. None of the camel specimens had molecular evidence of infection. Despite serial blind passage in Madin-Darby Canine Kidney cells (MDCK) cells, none of the nine horse specimens yielded an influenza A virus. None of the 131 herder households surveyed had recently vaccinated their horses against EIV. It seems likely that sporadic EIV is enzootic in multiple Mongolian aimags. This finding, the infrequent use of EIV vaccination, periodic prevalence of highly pathogenic avian influenza, and the mixing of domestic and wild equid herds suggest that Mongolia may be a hot spot for novel EIV emergence.
Quantifying Effectiveness of Streambank Stabilization Practices on Cedar River, Nebraska
Authors: Dave Naisargi , Mittelstet Aaron
Published: November 2017

Excessive sediment is a major pollutant to surface waters worldwide. In some watersheds, streambanks are a significant source of this sediment, leading to the expenditure of billions of dollars in stabilization projects. Although costly streambank stabilization projects have been implemented worldwide, long-term monitoring to quantify their success is lacking. There is a critical need to document the long-term success of streambank restoration projects. The objectives of this research were to (1) quantify streambank retreat before and after the stabilization of 18 streambanks on the Cedar River in North Central Nebraska, USA; (2) assess the impact of a large flood event; and (3) determine the most cost-efficient stabilization practice. The stabilized streambanks included jetties (10), rock-toe protection (1), slope reduction/gravel bank (1), a retaining wall (1), rock vanes (2), and tree revetments (3). Streambank retreat and accumulation were quantified using aerial images from 1993 to 2016. Though streambank retreat has been significant throughout the study period, a breached dam in 2010 caused major flooding and streambank erosion on the Cedar River. This large-scale flood enabled us to quantify the effect of one extreme event and evaluate the effectiveness of the stabilized streambanks. With a 70% success rate, jetties were the most cost-efficient practice and yielded the most deposition. If minimal risk is unacceptable, a more costly yet immobile practice such as a gravel bank or retaining wall is recommended.
Effects of Using High-Density Rain Gauge Networks and Weather Radar Data on Urban Hydrological Analyses
Authors: Yoon Seong-Sim , Lee Byongju
Published: November 2017

Flood prediction is difficult in urban areas because only sparse gauge data and radar data of low accuracy are usually used to analyze flooding and inundation. Sub-basins of urban areas are extremely small, so rainfall data of high spatial resolution are required for analyzing complex drainage systems with high spatial variability. This study aimed to produce three types of quantitative precipitation estimation (QPE) products using rainfall data that was derived from 190 gauges, including the new high-density rain-gauge network operated by the SK Planet company, and the automated weather stations of the Korea Meteorological Administration, along with weather radar data. This study also simulated urban runoff for the Gangnam District of Seoul, South Korea, using the obtained QPE products to evaluate hydraulic and hydrologic impacts according to three rainfall fields. The accuracy of this approach was assessed in terms of the amount and spatial distribution of rainfall in an urban area. The QPE products provided highly accurate results and simulations of peak runoff and overflow phenomena. They also accurately described the spatial variability of the rainfall fields. Overall, the integration of high-density gauge data with radar data proved beneficial for quantitative rainfall estimation.
Regalos de Filipinas a Cádiz en los barcos de la Armada (1765-1784)
Authors: Baena Zapatero Alberto
Published: November 2017

A partir de los registros de entrada de los barcos de la Armada en Cádiz (1765-1784) se analizan los regalos que se enviaban a la Península Así, se apunta qué mercancías eran preferidas, qué uso se les daba y qué significado tuvieron para sus propietarios Por último, se recuperan algunas de las relaciones personales tejidas por medio de estas piezas y cuál pudo ser la motivación de las mismas.
Construcciones identitarias y sentidos de pertenencia en el espacio surandino al finalizar la guerra de independencia. Salta (Argentina) y Bolivia entre 1824 y 1826
Authors: Chaile Telma Liliana , Quiñonez María Mercedes
Published: November 2017

Nos proponemos analizar los procesos de construcción identitaria en el espacio surandino en el interregno 1824-1826, etapa de gestación de fronteras estatales Se considerarán los casos de Salta y Bolivia en la conformación de la frontera para examinar las marcas identitarias emergentes en la construcción discursiva de las diferencias por parte de algunos actores de las elites locales.
La discusión política sobre mortalidad infantil en Chile durante la década de 1930. Elementos para una aproximación histórico política
Authors: Llanos Reyes Claudio , Fernanda Lanfranco María
Published: November 2017

Este artículo busca comprender cómo la discusión política chilena se planteó frente a los problemas de la mortalidad infantil durante la década de 1930 Las fuentes que se utilizarán serán principalmente los Diarios de Sesiones del Congreso Nacional junto con algunos informes del Estado sobre temas relativos a la salud pública y artículos científicos de la época sobre el problema en cuestión.
Marginalidad y vanguardia en la posguerra: los inicios del teatro crítico en Chile (1883-1913)
Authors: Donoso Rojas Carlos
Published: November 2017

Nuestra investigación analiza las características definitorias de un formato teatral alternativo, surgido en Chile tras el término de la Guerra del Pacífico, paralelo al de los circuitos obreros y de sectores aristocráticos Invisibilizado en su época, sin estar sujeto a presiones comerciales, o a la observancia de la crítica, su importancia debe dimensionarse tanto en su connotación testimonial, como por su aporte a la renovación de las artes escénicas nacionales Estas se expresaron en el desarrollo de nuevas técnicas de representación y, en particular, en una profunda innovación a partir de la escenificación de lo cotidiano, sentando las bases del teatro social chileno.
Testing Target-Adjustment and Pecking Order Models of Capital Structure and Estimating Speed of Adjustment
Authors: Ataünal Levent , Aybars Aslı
Published: November 2017

This article examines the explanation power of the pecking order and target adjustment models on 148 Borsa Istanbul (BIST) firms' capital structure over the period of 2005 to 2015. The article also estimates the speed of adjustment (SOA) to the targeted leverage level. Although a firm's capital structure is jointly determined by both theories, target adjustment model appear to have relatively higher power in explaining capital structures of BIST firms. Estimates of the adjustment speeds suggests that firms move toward their target debt ratios at a fast pace. Adjustment speeds estimated with market leverage were significantly higher (44% - 83%). Share price volatility was found to have a rather short-term impact on market leverage. Firms rapidly revert back to their targets and offset these fluctuations within few years. Adjustment speed estimates vary with the estimation method. System generalized methods of moment estimator (GMM-SYS) provided the slowest SOA estimation whereas firm-fixed effects estimators imparted the fastest adjustment speed.
Finger Spelling in Air System for Deaf and Dumb
Authors: Shrawankar Urmila , Gedam Shruti
Published: November 2017

Finger spelling in air helps user to operate a computer in order to make human interaction easier and faster than keyboard and touch screen. This article presents a real-time video based system which recognizes the English alphabets and words written in air using finger movements only. Optical Character Recognition (OCR) is used for recognition which is trained using more than 500 various shapes and styles of all alphabets. This system works with different light situations and adapts automatically to various changing conditions; and gives a natural way of communicating where no extra hardware is used other than system camera and a bright color tape. Also, this system does not restrict writing speed and color of tape. Overall, this system achieves an average accuracy rate of character recognition for all alphabets of 94.074%. It is concluded that this system is very useful for communication with deaf and dumb people.
Photoresponsive Nano-Coumarin with Indole Auxin Hormone
Authors: Sombat Witsanu , Wongkhan Kittiya , Jarussophon Suwatchai , Jitchati Rukkiat
Published: November 2017

In this work, we designed and synthesized two photoresponsive materials with 3-indoleacetic acid (IAA) plant hormone which can be monitored from the photoreposive properties of coumarin. The varied position of the long alkoxy side chain (-OC16H33) was purposely introduced to adhesive on the plant leaves. Two coumarin-caged nanomaterials showed average particle diameter about 400 nm and gave the maximum emission wavelength at 425 and 450 nm. The formulated nanoemulsion showed good wettability (θ=48o) withCassia fistulaleave surface. Interestingly, CM2 gave the short photoresponse of photolysis within one day.