bluuebunny/crossref_metadata_2025_split huggingface dataset:
Comportamiento de variables químicas de un suelo sometido a distintos usos, departamento de Nariño, Colombia
Authors: Arteaga J. Julio César , Navia E. Jorge Fernando , Castillo Jesús Antonio 
Published: January 2017

El presente estudio se realizó en un Andisol clasificado como Vitric haplustands, ubicado en el Corregimiento de Obonuco, Municipio de Pasto (Colombia). Se evaluaron algunas características químicas, en siete tipos de uso y manejo del suelo: T1: monocultivo de papa (Solanum tubersum L.), T2: pradera (Pennisetum clandestinum Hochst. ex Chiov), T3: barrera multiestrato, T4: sistema acacia - aliso, T5: banco de proteína, T6: bosque plantado (Eucaliptus globulus Labill) y T7: bosque nativo. El efecto de los tipos de uso y manejo, sobre las propiedades químicas del suelo, se evaluaron a través de pH, %MO, %CO, N total, P, CIC, Ca, Mg, K, Al, Fe, Mn Cu, Zn, B y S. Los resultados fueron sometidos a Análisis de Varianza, Prueba de Comparaciones de Medias (LSD), Diferencia Mínima Significativa (DMS) y correlaciones de Persson. Los valores mostraron diferencias significativas (P<0,05) entre los tratamientos para los contenidos de pH, %MO, %CO, N total, P, CIC Ca, Mg, K, Fe y S, mientras que no se presentaron efectos sobre los contenidos de Al, Mn, B, Zn y Cu. Los mayores valores de %MO, %CO, N total, CIC, Ca, Mg y S, fueron obtenidos con los tratamientos T3, T4 y T7. Los resultados sugieren a la materia orgánica, como la variable más sensible al efecto del manejo de los suelos.
Fertiriego con silicio en variedades de rosa sobre la severidad de mildeo polvoso (Sphaerotheca pannosa var. rosae)
Authors: Albornoz B. Cesar , Silva P. Amanda , Torres M. Francisco 
Published: January 2017

La investigación evaluó el Fertiriego con silicio en la severidad del mildeo polvoso (Sphaerotheca pannosa var. rosae) en tres variedades de rosa bajo invernadero. Se empleó un diseño de parcelas subsubdividas; los tratamientos principales correspondieron a tres dosis de silicio (SiO2) (DS): (DS1=3mgL-1), (DS2=6mgL-1) y (DS3=9mgL-1); los sub-tratamientos a dos tipos de Fertiriego (L): (L1=3 mmdía-1), (L2=5 mmdía-1) y los sub-sub-tratamientos a tres variedades (V): (V1 = Vendela), (V2 = Reed Unique) y (V3 = Miracle). Se presentaron diferencias (p≤0,01) por el efecto de la DS (dosis de silicio), L (láminas de fertiriego) y V (variedades); como también de la interacción DS*L (p≤0,01). Las aplicaciones de DS3 redujeron el porcentaje de severidad del hongo (20%) y las de DS1 fueron menos eficientes (230%). Se obtuvieron menores porcentajes de severidad del hongo con la aplicación de la lámina de agua de fertiriego L1 (130%) y más altos con la L2 (280%). Las variedades V2 y V3 fueron menos afectadas por el hongo (170 y 160%) y la V1 fue más susceptible (320%). La dosis DS3 y la lámina de fertiriego L1 actuaron conjuntamente sobre una menor reducción del grado de severidad del hongo (75%) (p≤0,05). El comportamiento de las variedades Miracle y Reed Unique con una lámina de fertiriego de 3mmdía-1 y dosis de 9mgL-1 de Silicio, podrían ser claves para la disminución de la severidad de Sphaerotheca pannosa var. rosae en zonas productoras de flores de Colombia.
Influence of Geographical Conditions on the Spatial Structure of Jayapura City
Authors: Baharuddin Alfini , Wibisono B Hari , Prayitno Budi , Roychansyah M Sani 
Published: January 2017

Jayapura City is situated in the eastern tip of Indonesia and borders the neighboring country Papua New Guinea (PNG). Its geographical conditions are very diverse dominated by hills leading to the formation of separated urban areas. Currently, there are two major urban areas, Jayapura and Abepura. Historically, Jayapura and Abepura were two old towns established in the Dutch rule, namely Hollandia Haven and Hollandia Binnen. They are detached by Skyline hills that hinder their complete physical merger. The presence of two separated urban areas in Jayapura City is also reinforced by the image perceived by the residents regarding with the powerful visual image of those cities. It however forms unique and distinctive properties in the spatial structure of Jayapura City. This study examines how the influence of geographical conditions on the spatial structre of Jayapura City. Data collection was done through direct observation and interviews with respondents of Jayapura and Abepura. Direct observation was conducted to obtain data on the use of land that form patterns in Jayapura City area. While collecting data through questionnaires conducted to determine the image of residents of Jayapura City on the spatial structure of the city. The results showed that the geographical conditions in Jayapura City affect the formation of two separate parts of the city. The geographical condition is also an element forming a strong spatial structure as a characteristic reinforces the visual impression of the existence of two cities in a “single city”.
Impacts of Climate Change (El Nino, La Nina, and Sea Level) on the Coastal Area of Cilacap Regency
Authors: Supriatin Lilik S. , Martono Martono 
Published: January 2017

This research was conducted to determine the impact of El Nino and La Nina on rainfall as well as the impact of El Nino, La Nina, and sea level on coastal flooding in Cilacap Regency. The methods used in this study were statistical analysis and simulation. The results of this study were El Nino caused diminished rainfall in Cilacap regency between 295 to 1665 mm. Meanwhile, La Nina caused surplus rainfall between 189 - 691 mm/year in compared with annual climatological rainfall. When ENSO phenomenon (El Nino) occurred, it caused sea level anomaly to fall, including in 1994, 1997, and 2002 of -11.63 cm, -11.5 cm, and -4.95 cm, respectively. Meanwhile, in La Nina years in 1999 and 2000, the sea level anomaly enhanced by 2.55 cm and 5.03 cm, respectively. The result of sea level projection by employing simulation model in this study was compared with the simulation results of the IPCC that obtained a correlation coefficient r of 0.99. Based on the simulation results, the 8 (eight) sub-districts in Cilacap Regency located in the coastal area potentially endure flood due to the impacts of global warming and La Nina with a diverse predicted year of occurrence depending on the altitude of each sub-district.
Early winter avifaunal diversity from Buxa Tiger Reserve and Rasikbeel Wetland Complex of northern part of West Bengal, India
Authors: Adhurya Sagar , Banerjee Moitreyee , Pal Achintya Kumar , Roy Utpal Singha 
Published: January 2017

The present study was carried out to record the avifaunal diversity and abundance in and around Buxa Tiger Reserve (Raja Bhat Khawa, Buxa Fort, Raimatang and Jayanti) and Rasikbeel Wetland Complex, situated at the northern part of West Bengal, India during 19th – 22nd November, 2013. A total of 60 bird species belonging to 31 families were identified during four days of study period of which 8 were winter migrants, one was summer migrant and rest were resident. Anthropogenic interventions have altered much of the natural habitat of the present study location; however, a healthy avifaunal diversity was recorded during the present study. More intensive investigations will certainly enrich our knowledge of avian diversity and distribution pattern from the present study location leading to the proper conservation of this important bird area. This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Note on taxonomy of Chlorogloeopsis fritschii (Mitra) Mitra et Pandey with soil analysis, collected from a rice field in West Bengal, India
Authors: Halder Nilu 
Published: January 2017

While studying on paddy field blue green algae, author for the first time recorded a blue green algal species Chlorogloeopsis fritschii (Mitra) Mitra et Pandey from rice field soil in summer during 2013 in Hooghly, West Bengal, India. In the present paper, taxonomical description with microphotographs of the species has been provided. In addition to that, soil which was collected from the algal occurrence site has been analyzed. The different physico-chemical parameters of soil were as followed: pH: 7.1; EC: 0.142 dSm-1; OC: 6.6 mgkg-1; Ca2+: 4.6 cmol+kg-1; Na+: 0.71 cmol+kg-1; K+: 0.15 cmol+kg-1; CEC: 12.6 cmol+kg-1; WHC: 45%. Soil textures were as: sand: 36.2%, slit: 28.1% and clay: 35.7%. This study of soil showed its nature and present nutrient content. As the alga contains heterocyst and can fix atmospheric nitrogen to soil so, it can apply in rice fields as biofertilizer to enhance the yield of rice and increase of soil fertility. This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Extinction Correction Significantly Influences the Estimate of the Lyα Escape Fraction
Authors: An Fang Xia , Zheng Xian Zhong , Hao Cai-Na , Huang Jia-Sheng , Xia Xiao-Yang 
Published: January 2017

Abstract
The Lyα escape fraction is a key measure to constrain the neutral state of the intergalactic medium and then to understand how the universe was fully reionized. We combine deep narrowband imaging data from the custom-made filter NB393 and the

filter centered at 2.14 μm to examine the Lyα emitters and Hα emitters at the same redshift z = 2.24. The combination of these two populations allows us to determine the Lyα escape fraction at z = 2.24. Over an area of 383 arcmin2 in the Extended Chandra Deep Field South (ECDFS), 124 Lyα emitters are detected down to NB393 = 26.4 mag at the 5σ level, and 56 Hα emitters come from An et al. Of these, four have both Lyα and Hα emissions (LAHAEs). We also collect the Lyα emitters and Hα emitters at z = 2.24 in the COSMOS field from the literature, and increase the number of LAHAEs to 15 in total. About one-third of them are AGNs. We measure the individual/volumetric Lyα escape fraction by comparing the observed Lyα luminosity/luminosity density to the extinction-corrected Hα luminosity/luminosity density. We revisit the extinction correction for Hα emitters using the Galactic extinction law with color excess for nebular emission. We also adopt the Calzetti extinction law together with an identical color excess for stellar and nebular regions to explore how the uncertainties in extinction correction affect the estimate of individual and global Lyα escape fractions. In both cases, an anti-correlation between the Lyα escape fraction and dust attenuation is found among the LAHAEs, suggesting that dust absorption is responsible for the suppression of the escaping Lyα photons. However, the estimated Lyα escape fraction of individual LAHAEs varies by up to ∼3 percentage points between the two methods of extinction correction. We find the global Lyα escape fraction at z = 2.24 to be (3.7 ± 1.4)% in the ECDFS. The variation in the color excess of the extinction causes a discrepancy of ∼1 percentage point in the global Lyα escape fraction.
What Lurks in ULIRGs?—Probing the Chemistry and Excitation of Molecular Gas in the Nuclei of Arp 220 and NGC 6240
Authors: Manohar Swarnima , Scoville Nick 
Published: January 2017

Abstract
We have imaged the dense star-forming regions of Arp 220 and NGC 6240 in the 3 mm band transitions of CO, HCN, HCO+, HNC, and CS at 0.″5–0.″8 resolution using CARMA. Our data set images all these lines at similar resolutions and high sensitivity, and can be used to derive line ratios of faint high excitation lines. In both the nuclei of Arp 220, the HCN/HNC ratios suggest chemistry of X-ray Dominated Regions (XDRs)—a likely signature of an active galactic nucleus. In NGC 6240, there is no evidence of XDR type chemistry, but there the bulk of the molecular gas is concentrated between the nuclei rather than on them. We calculated molecular H2 densities from excitation analysis of each of the molecular species. It appears that the abundances of HNC and HCO+ in Ultra Luminous Infrared Galaxies may be significantly different from those in galactic molecular clouds. The derived H2 volume densities are ∼5 × 104 cm−3 in the Arp 220 nuclei and ∼104 cm−3 in NGC 6240.
The Impact of Modeling Assumptions in Galactic Chemical Evolution Models
Authors: Côté Benoit , O’Shea Brian W. , Ritter Christian , Herwig Falk , Venn Kim A. 
Published: January 2017

Abstract
We use the OMEGA galactic chemical evolution code to investigate how the assumptions used for the treatment of galactic inflows and outflows impact numerical predictions. The goal is to determine how our capacity to reproduce the chemical evolution trends of a galaxy is affected by the choice of implementation used to include those physical processes. In pursuit of this goal, we experiment with three different prescriptions for galactic inflows and outflows and use OMEGA within a Markov Chain Monte Carlo code to recover the set of input parameters that best reproduces the chemical evolution of nine elements in the dwarf spheroidal galaxy Sculptor. This provides a consistent framework for comparing the best-fit solutions generated by our different models. Despite their different degrees of intended physical realism, we found that all three prescriptions can reproduce in an almost identical way the stellar abundance trends observed in Sculptor. This result supports the similar conclusions originally claimed by Romano & Starkenburg for Sculptor. While the three models have the same capacity to fit the data, the best values recovered for the parameters controlling the number of SNe Ia and the strength of galactic outflows, are substantially different and in fact mutually exclusive from one model to another. For the purpose of understanding how a galaxy evolves, we conclude that only reproducing the evolution of a limited number of elements is insufficient and can lead to misleading conclusions. More elements or additional constraints such as the Galaxy’s star-formation efficiency and the gas fraction are needed in order to break the degeneracy between the different modeling assumptions. Our results show that the successes and failures of chemical evolution models are predominantly driven by the input stellar yields, rather than by the complexity of the Galaxy model itself. Simple models such as OMEGA are therefore sufficient to test and validate stellar yields. OMEGA is part of the NuGrid chemical evolution package and is publicly available online at http://nugrid.github.io/NuPyCEE.
PTF1 J082340.04+081936.5: A Hot Subdwarf B Star with a Low-mass White Dwarf Companion in an 87-minute Orbit
Authors: Kupfer Thomas , Roestel Jan van , Brooks Jared , Geier Stephan , Marsh Tom R. , Groot Paul J. , Bloemen Steven , Prince Thomas A. , Bellm Eric , Heber Ulrich , Bildsten Lars , Miller Adam A. , Dyer Martin J. , Dhillon Vik S. , Green Matthew , Irawati Puji , Laher Russ , Littlefair Stuart P. , Shupe David L. , Steidel Charles C. , Rattansoon Somsawat , Pettini Max 
Published: January 2017

Abstract
We present the discovery of the hot subdwarf B star (sdB) binary PTF1 J082340.04+081936.5. The system has an orbital period of

= 87.49668(1) minutes (0.060761584(10) days), making it the second-most compact sdB binary known. The light curve shows ellipsoidal variations. Under the assumption that the sdB primary is synchronized with the orbit, we find a mass of

, a companion white dwarf mass of

, and a mass ratio of

. The future evolution was calculated using the MESA stellar evolution code. Adopting a canonical sdB mass of

, we find that the sdB still burns helium at the time it will fill its Roche lobe if the orbital period was less than 106 minutes at the exit from the last common envelope (CE) phase. For longer CE exit periods, the sdB will have stopped burning helium and turned into a C/O white dwarf at the time of contact. Comparing the spectroscopically derived

and

with our MESA models, we find that an sdB model with a hydrogen envelope mass of

matches the measurements at a post-CE age of 94 Myr, corresponding to a post-CE orbital period of 109 minutes, which is close to the limit to start accretion while the sdB is still burning helium.
Formation and Fractionation of CO (Carbon Monoxide) in Diffuse Clouds Observed at Optical and Radio Wavelengths
Authors: Liszt H. S. 
Published: January 2017

Abstract
We modeled

and CO formation incorporating the fractionation and selective photodissociation affecting CO when

≲ 2 mag. UV absorption measurements typically have N(

)/N(

) ≈ 65 that are reproduced with the standard UV radiation and little density dependence at n(H) ≈ 32–1024

: densities n(H) ≲ 256

avoid overproducing CO. Sightlines observed in millimeter wave absorption and a few in UV show enhanced

by factors of two to four and are explained by higher n(H) ≳ 256

and/or weaker radiation. The most difficult observations to understand are UV absorptions having N(

)/N(

) > 100 and N(CO) ≳ 1015

. Plots of

versus N(CO) show that

remains linearly proportional to N(CO) even at high opacity owing to sub-thermal excitation.

and

have nearly the same curve of growth so their ratios of column density/integrated intensity are comparable even when different from the isotopic abundance ratio. For n(H) ≳ 128

, plots of

versus N(CO) are insensitive to n(H), and

/N(CO) ≈ 1

/(1015 CO

); this compensates for small CO/

to make

more readily detectable. Rapid increases of N(CO) with n(H), N(H), and N(

) often render the CO bright, i.e., a small CO-

conversion factor. For n(H) ≲ 64

, CO enters the regime of truly weak excitation, where

∝ n(H)N(CO).

is a strong function of the average

fraction and models with

= 1

fall in the narrow range of

0.65–0.8 or

0.4–0.5 at

0.1

. The insensitivity of easily detected CO emission to gas with small

implies that even deep CO surveys using broad beams may not discover substantially more emission.
Stability of Sulphur Dimers (S2) in Cometary Ices
Authors: Mousis O. , Ozgurel O. , Lunine J. I. , Luspay-Kuti A. , Ronnet T. , Pauzat F. , Markovits A. , Ellinger Y. 
Published: January 2017

Abstract
S2 has been observed for decades in comets, including comet 67P/Churyumov–Gerasimenko. Despite the fact that this molecule appears ubiquitous in these bodies, the nature of its source remains unknown. In this study, we assume that S2 is formed by irradiation (photolysis and/or radiolysis) of S-bearing molecules embedded in the icy grain precursors of comets and that the cosmic ray flux simultaneously creates voids in ices within which the produced molecules can accumulate. We investigate the stability of S2 molecules in such cavities, assuming that the surrounding ice is made of H2S or H2O. We show that the stabilization energy of S2 molecules in such voids is close to that of the H2O ice binding energy, implying that they can only leave the icy matrix when this latter sublimates. Because S2 has a short lifetime in the vapor phase, we derive that its formation in grains via irradiation must occur only in low-density environments such as the ISM or the upper layers of the protosolar nebula, where the local temperature is extremely low. In the first case, comets would have agglomerated from icy grains that remained pristine when entering the nebula. In the second case, comets would have agglomerated from icy grains condensed in the protosolar nebula and that would have been efficiently irradiated during their turbulent transport toward the upper layers of the disk. Both scenarios are found consistent with the presence of molecular oxygen in comets.
Cooperação universidade-empresa: os casos da Universidade Federal de Sergipe e parceiros (Petrobras e SergipeTec)
Authors: Silva Amanda Luiza Soares , Andrade Flávia Gois de , Gomes Iracema Machado de Aragão 
Published: January 2017

A interação tecnológica acontece entre diversos atores (universidades, empresas e governo) com o objetivo de transformar pesquisas científicas em tecnologia (novos produtos, serviços e/ou processos) que beneficiem a sociedade e desenvolvam a economia da região de forma sustentável. O presente estudo teve como objetivo geral identificar a interação tecnológica (projetos e curso) entre a Universidade Federal de Sergipe - UFS e parceiros (Petrobras e Sergipe Parque Tecnológico – SergipeTec). O estudo foi de caráter descritivo com abordagem qualitativa e o método utilizado foi o estudo de casos múltiplos. Os dados foram coletados por meio de entrevistas semiestruturadas com representantes da UFS e da Petrobras e estruturadas com os respondentes do SergipeTec. Os resultados UFS-Petrobras mostraram que a interação gera contribuições ao desenvolvimento regional e nacional (geração de renda e emprego), oferecendo vantagens (estrutura física e laboratorial, bolsa de pesquisa, produtos e serviços inovadores) e revelando dificuldades (burocracia e divergência de objetivos e linguagem). Com relação ao curso de Petróleo e Gás, ressaltou-se o interesse da Petrobras na formação de recursos humanos para trabalhar na indústria petrolífera. Os resultados UFS-SergipeTec identificaram benefícios da interação entre as instituições, em especial inovação tecnológica, interação com o setor produtivo, desenvolvimento de novos produtos e processos, apoio aos projetos e pesquisa aplicada. No caso do SergipeTec, notou-se como vantagem, a geração de tecnologias e a universidade como centro de desenvolvimento científico-tecnológico. Além disso, identificou-se a burocracia, como maior obstáculo.
PRÁTICAS DE EVIDENCIAÇÃO EM ENTIDADES DESPORTIVAS: UM ESTUDO NOS CLUBES DE FUTEBOL BRASILEIROS
Authors: Figueiredo Guilherme Henrique , Dos Santos Vanderlei , Da Cunha Paulo Roberto 
Published: January 2017

O estudo objetiva identificar o nível de evidenciação compulsória e voluntária dos clubes de futebol das séries A e B no que concerne aos aspectos de apresentação das demonstrações contábeis no período de 2011 a 2015. Pesquisa com abordagem quantitativa foi realizada a partir da análise de conteúdo das demonstrações financeiras divulgadas por 25 clubes de futebol, sendo 17 pertencentes à Série A do Campeonato Brasileiro e 8 da Série B do mesmo campeonato. Foram consideradas três categorias de análise: (i) demonstrações contábeis obrigatórias; (ii) demonstrações e relatórios contábeis complementares; e (iii) itens obrigatórios de divulgação nas notas explicativas. Os resultados evidenciaram que a maioria dos clubes publica suas demonstrações contábeis obrigatórias, contudo, muitas destas publicações são precedidas por parecer de auditoria com ressalvas devido à inobservância de algumas normas contábeis, o que compromete a comparabilidade das demonstrações contábeis entre os clubes e a qualidade da informação divulgada. A maioria dos clubes não publica o relatório da administração, a demonstração do valor adicionado e o balanço social. Apenas os gastos com a formação de atletas e o seu valor amortizado são evidenciados de forma completa pela maioria dos clubes. Contudo, percebe-se um número considerável de entidades desportivas que não atendem os preceitos de divulgação exigidos pelas normas contábeis. Os resultados indicam um índice médio de evidenciação de 61% dos clubes da série A e 35,2% da série B. Conclui-se que as informações divulgadas pelos clubes de futebol nas demonstrações contábeis e notas explicativas não respeitam o princípio do full disclosure.
Fatores para a Implementação da Mudança em Sistemas de Contabilidade Gerencial
Authors: Angonese Rodrigo , Lavarda Carlos Eduardo Facin 
Published: January 2017

Esta pesquisa objetivou analisar os fatores motivadores do processo de mudança do sistema de contabilidade gerencial, sob a ótica da teoria institucional. Classificou-se a pesquisa como descritiva, qualitativa, operacionalizada pelo procedimento de estudo de caso explicativo. Os dados foram coletados por meio de entrevistas semiestruturadas, e analisados pela técnica da análise de conteúdo. Os resultados mostram que, no caso analisado, a mudança nos sistemas de contabilidade gerencial foi motivada por um conjunto particular de fatores (improvisação e pressão social do ambiente), representativos de pressões internas e externas às organizações, cada qual com sua intensidade.