bluuebunny/crossref_metadata_2025_split huggingface dataset:
Material Balance Validation of Subsurface Uncertainties in a Deepwater Turbidite System: A Case Study of the Agbami Field
Authors: Sunmonu Olanrewaju , Ogbuagu Frank , Ebo Henrietta , Odusote Olufemi 
Published: August 2014

Abstract
The value of using the Material Balance equation to gain insights into the performance of a field post-production has been proven over the years in various hydrocarbon fields. This paper discusses the use of this tool in validating the dynamic performance of the Agbami field and the characterization of some aspects of its reservoir architecture.
The Agbami field came on production in July 2008 and achieved its target plateau rate in December 2008. The conceptual model of the Agbami subsurface structure has been refined over the years. The field's major reservoirs were initially subdivided into 7 regions based on available pressure and seismic data before full field development commenced. Dynamic behaviour observed to date has shown significant deviations from earlier predictions. Explanations to these differences were sought through various studies, with production and pressure data playing a crucial role in increased understanding of the reservoir.
MBAL™, the IPM software tool, was used in the analyses discussed. Multi-tank material balance models were constructed and employed to investigate uncertainties in compartmentalization, hydrocarbon volumes and aquifer properties. Production and injection data from the active wells were used for history matching while static bottomhole pressure data from permanent downhole gauges in the Agbami intelligent wells were employed in the pressure matching of the wells within the various reservoir regions. This paper describes how these models were developed.
The main findings resulted in the re-alignment of the earlier defined monitoring regions of the main reservoir from seven to three. These regions which were previously treated as separate compartments have now been collapsed into single tanks based on the findings of the multi-tank model. Results have been corroborated by findings from 3D simulation and well tests, further emphasizing the importance and need for such simple models in the development of a complex deepwater field like Agbami.
Design, Execution and Evaluation of Acid Stimulation Job in a Subsea Deepwater Well
Authors: Olatunji Idris , Ogunsina Oluseye , Okosun Joshua , Horsfall Ipalibo , Agbahara Chidi , Smith Seun , Yahaya Ismael , Ogoja Oluwafemi 
Published: August 2014

Abstract
This well was drilled and completed as a Frac & Pack oil producer with subsea wellhead in 3300 ft water depth. Despite all the care taken to maintain cleanliness during completion, initial performance on starting up the well indicated that it was severely impaired during the drilling phase with drawdown as much as 2300 psi observed. The well initially failed to reach the Hydrate Dissociation Temperature (HDT) of 35C within the specified period of 1 hour.
The well was eventually successfully started and some performance improvement was observed as the well was cleaned up gradually over the next few months but the potential of the well had to be revised down from the planned 30kbpd to 12kbpd to honour drawdown limit of 350psi.
This paper documents the effort made to restore the well's planned production of 30kbpd by acid stimulation treatment by bullheading from the rig. From the well history, the source of impairment was attributed to drilling fluids. Thus, a half-strength mud acid was chosen as the treatment fluid and the placement was by high-rate bullheading from the rig connected to the subsea Xmas tree via a riser and EDP/LRP. The risk of flowing unspent acid through subsea flowlines and topsides equipment on the FPSO was assessed. Corrosion simulation studies showed the subsea flowlines can withstand the possible unspent acid with proper dilution by flowing high water cut wells at high rate through the same bulk flowlines being used to unload the just treated well. The dilution also helped protect the topsides equipment while further protection was provided by injecting diluted sodium hydroxide into the flow stream as it enters the topsides.
The result of the treatment was that productivity index increased by a factor of 3 from 27 bpd/psi to ca. 90 bpd/psi and the well is now producing at 30 kbopd.
Potentials of Urban Agriculture in Reflection of “The Thessaloniki Project - Red and Green”
Authors: Fáczányi Zsuzsanna 
Published: August 2014

Abstract
In spite of the fact the scene of food production is the rural territory; we are witnessing more and more unusual endeavours for farming in cities, additionally in megalopolises. There are numerous researches on the theme, and the new interest in the local cultivation of fruit and vegetable in cities is becoming an earnest factor in urban life in Western Europe, in the USA, and in the Developing World. At the Aristotle University of Thessaloniki, AUTh two professors of architecture managed a course for MSc students of architecture and horticulture, with the intend of designing forms of urban agriculture on a fallow area in Thessaloniki, and considering the crisis situation in Greek. With analysing the proposals of “The Thessaloniki project - Red and Green” parallel with various realized urban agriculture projects I emphasise the force and necessity of the generation of a community
Use of Drugs and Treatment Cost in Acute Watery Diarrhoea of Under-2 Children Attending a Tertiary Hospital of Bogra
Authors: Muraduzzaman AKM , Islam S M Rashed-Ul , Siddiqui Md. Mahmudur Rahman 
Published: August 2014

A cross-sectional study was conducted in Mohammad Ali hospital (MAH) of Bogra from Bangladesh to evaluate the hand washing and exclusive breast feeding (EBF) practice and to explore the rational use of anti-diarrhoeal therapy in Acute Watery Diarrhea (AWD) and expenditure of the family in treatment. A total of 660 under-2 children attending at MAH with the complaints of AWD were selected for the study. The mean age (mean±SD) of the attended child was 11.75±5.16 months. About 80% of the respondents (mothers of under-2 child) were below SSC level in terms of educational status while about 9% were illiterate. About 85% of the respondent seek treatment from non-registered practitioners (NRP) while registered doctors contributed only among 12% which was found statistically significant in comparison to their family income (p<0.001). Azythromycin was the most prescribed drugs (22.4%) followed by ciprofloxacin (21.7%) and erythromycin (15.9%) which was mostly prescribed by non-registered doctors (p <0.05). The families had to spend a mean cost of Tk. 209/- which was spend significantly high on NRP (p<0.05) as a direct treatment cost. Misuse of antibiotics was observed from NRP and a handsome amount was spending on them. Moreover, About 91% of the total respondent did not practice exclusive breast feeding and about 99% mother found to admit improper hand hygiene. To reduce unnecessary expenditure and ensure proper treatment of AWD, it was recommended to aware the community on quality management at government facility.DOI: http://dx.doi.org/10.3329/jom.v14i2.19665 J Medicine 2013, 14(2): 143-148
Autoimmune Haemolysis in Visceral Leishmaniasis: A Case Report & Review of Literature
Authors: Kabir Ahmedul , Das Aparna , Islam Mohammad Shahidul , Masud Mohammad Shahin , Cader Fathima Aaysha , Jahan Sharah 
Published: August 2014

Visceral Leishmaniasis is a very common but neglected disorder in Bangladesh. It can remain subclinical or become symptomatic with an acute, sub acute or chronic course. Atypical presentations can be equally challenging to the clinician. Visceral leishmaniasis is associated with various autoimmune phenomena. Sometimes it can mimic any autoimmune disorders including Autoimmune Hemolytic Anemia (AIHA), SLE, and Rheumatoid Arthritis etc. Here, we describe a case of visceral leishmaniasis with Coombs positive autoimmune hemolytic anemia.DOI: http://dx.doi.org/10.3329/jom.v14i2.19686 J Medicine 2013, 14(2): 198-200
Locally injected autologous platelet-rich plasma enhanced tissue perfusion and improved survival of long subdermal plexus skin flaps in dogs
Authors: Papazoglou L. G. , Loukopoulos P. , Kazakos G. , Chantes A. , Giannakas N. , Savvas I. , Psalla D. , Kritsepi-Konstantinou M. , Dionyssiou D. , Karayannopoulou M. 
Published: August 2014

SummaryObjectives: Distal flap necrosis remains a major complication in subdermal plexus (random) skin flaps. Platelet-rich plasma (PRP) has been shown to improve the survival of ischemic random skin flaps in rats. The objective of this study was to evaluate the effect of locally injected autologous PRP on the survival of long (5:1 length-to-width ratio) subdermal plexus skin flaps in dogs.Methods: A 2x10 cm subdermal plexus skin flap was created bilaterally on the abdominal wall of six Beagle dogs. One randomly selected side received 2.5 ml of fresh autologous PRP injected evenly between sutures underneath the flap, whereas the other side was left untreated (control). Skin flap survival was evaluated macroscopically, histologically and by laser-Doppler flowmetry measurements of tissue perfusion.Results: Flap percentage survival on day 10 (96.3% versus 74.5%; p = 0.046) and tissue perfusion (p <0.036) were significantly higher in PRP-treated flaps compared with controls. Histologically, there was less oedema in PRP-treated flaps compared to controls (p = 0.01), whereas collagen production and angiogenesis did not differ significantly between the two groups.Clinical significance: The use of locally injected autologous PRP increases tissue perfusion and improves the survival of long subdermal plexus skin flaps in dogs.
Audiovisual en línea en la universidad española: bibliotecas y servicios especializados (una panorámica)
Authors: Yepes Alfonso López 
Published: August 2014

Situación que presenta la información audiovisual en línea en el ámbito de las bibliotecas y servicios audiovisuales universitarios españoles, con ejemplos de aplicaciones y desarrollos concretos. Se destaca la presencia del audiovisual fundamentalmente en blogs, canales IPTV, portales bibliotecarios propios y en actuaciones concretas como “La Universidad Responde”, a cargo de los servicios audiovisuales de las universidades españolas, que supone sin duda un marco de referencia y de difusión informativa muy destacado también para el ámbito bibliotecario; así como en redes sociales, mencionándose una propuesta de modelo de red social de biblioteca universitaria. Se remite a la participación de bibliotecas y servicios en proyectos colaborativos de investigación y desarrollo social, presencia ya efectiva en el marco del proyecto “Red iberoamericana de patrimonio sonoro y audiovisual”, que apuesta por la construcción social del conocimiento audiovisual basado en la interacción entre distintos grupos multidisciplinarios de profesionales con diferentes comunidades de usuarios e instituciones.A situation presenting audiovisual information online in the field of libraries and audiovisual university spanish services, with examples of applications and specific developments. The presence of the audiovisual in blogs and IPTV channels librarians and specific actions as The University Respond, in charge of the audiovisual services of the spanish universities, a very important reference and information dissemination for the field librarian and in social networks, mentioning a model of social network of University Library. Participation of libraries and services in collaborative research and social development projects in the Ibero-American network of sound and audiovisual heritage project, for the social construction of the audiovisual knowledge based on the interaction between various multidisciplinary groups of professionals with different communities of users and institutions.
Antarctic icebergs: A significant natural ocean sound source in the Southern Hemisphere
Authors: Matsumoto Haru , Bohnenstiehl DelWayne R. , Tournadre Jean , Dziak Robert P. , Haxel Joseph H. , Lau T.‐K. A. , Fowler Matt , Salo Sigrid A. 
Published: July 2014

AbstractIn late 2007, two massive icebergs, C19a and B15a, drifted into open water and slowly disintegrated in the southernmost Pacific Ocean. Archived acoustic records show that the high‐intensity underwater sounds accompanying this breakup increased ocean noise levels at mid‐to‐equatorial latitudes over a period of ∼1.5 years. More typically, seasonal variations in ocean noise, which are characterized by austral summer‐highs and winter‐lows, appear to be modulated by the annual cycle of Antarctic iceberg drift and subsequent disintegration. This seasonal pattern is observed in all three Oceans of the Southern Hemisphere. The life cycle of Antarctic icebergs affects not only marine ecosystem but also the sound environment in far‐reaching areas and must be accounted for in any effort to isolate anthropogenic or climate‐induced noise contributions to the ocean soundscape.
Quantified energy dissipation rates in the terrestrial bow shock: 1. Analysis techniques and methodology
Authors: Wilson L. B. , Sibeck D. G. , Breneman A. W. , Contel O. Le , Cully C. , Turner D. L. , Angelopoulos V. , Malaspina D. M. 
Published: July 2014

AbstractWe present a detailed outline and discussion of the analysis techniques used to compare the relevance of different energy dissipation mechanisms at collisionless shock waves. We show that the low‐frequency, quasi‐static fields contribute less to ohmic energy dissipation, (−j·E), than their high‐frequency counterparts. In fact, we found that high‐frequency, large‐amplitude (>100 mV/m and/or >1 nT) waves are ubiquitous in the transition region of collisionless shocks. We quantitatively show that their fields, through wave‐particle interactions, cause enough energy dissipation to regulate the global structure of collisionless shocks. The purpose of this paper, part one of two, is to outline and describe in detail the background, analysis techniques, and theoretical motivation for our new results presented in the companion paper. The companion paper presents the results of our quantitative energy dissipation rate estimates and discusses the implications. Together, the two manuscripts present the first study quantifying the contribution that high‐frequency waves provide, through wave‐particle interactions, to the total energy dissipation budget of collisionless shock waves.
Quantified energy dissipation rates in the terrestrial bow shock: 2. Waves and dissipation
Authors: Wilson L. B. , Sibeck D. G. , Breneman A. W. , Contel O. Le , Cully C. , Turner D. L. , Angelopoulos V. , Malaspina D. M. 
Published: July 2014

AbstractWe present the first quantified measure of the energy dissipation rates, due to wave‐particle interactions, in the transition region of the Earth's collisionless bow shock using data from the Time History of Events and Macroscale Interactions during Substorms spacecraft. Our results show that wave‐particle interactions can regulate the global structure and dominate the energy dissipation of collisionless shocks. In every bow shock crossing examined, we observed both low‐frequency (<10 Hz) and high‐frequency (10 Hz) electromagnetic waves throughout the entire transition region and into the magnetosheath. The low‐frequency waves were consistent with magnetosonic‐whistler waves. The high‐frequency waves were combinations of ion‐acoustic waves, electron cyclotron drift instability driven waves, electrostatic solitary waves, and whistler mode waves. The high‐frequency waves had the following: (1) peak amplitudes exceeding δB∼ 10 nT and δE∼ 300 mV/m, though more typical values were δB∼ 0.1–1.0 nT and δE∼ 10–50 mV/m; (2) Poynting fluxes in excess of 2000 μW m−2 (typical values were ∼1–10 μW m−2); (3) resistivities > 9000 Ω m; and (4) associated energy dissipation rates >10 μW m−3. The dissipation rates due to wave‐particle interactions exceeded rates necessary to explain the increase in entropy across the shock ramps for ∼90% of the wave burst durations. For ∼22% of these times, the wave‐particle interactions needed to only be ≤ 0.1% efficient to balance the nonlinear wave steepening that produced the shock waves. These results show that wave‐particle interactions have the capacity to regulate the global structure and dominate the energy dissipation of collisionless shocks.
Monitoring the occurrence of seasonal low‐oxygen events off the Changjiang Estuary through integration of remote sensing, buoy observations, and modeling
Authors: Chen Jianyu , Ni Xiaobo , Liu Mingliang , Chen Jianfang , Mao Zhihua , Jin Haiyan , Pan Delu 
Published: July 2014

AbstractBottom water hypoxia occurs frequently during the summer off the Changjiang Estuary. To estimate its spatial extent and investigate how climatic variations and extreme events may affect its occurrence, we developed a regional statistical model that combines satellite and buoy observations via empirical and statistical relationships. The estimated results were validated using cruise data off the Changjiang Estuary and its adjacent areas. First, we quantified the linkage between the observed dissolved oxygen (DO) concentrations in the bottom water and the chlorophyll‐a (Chl‐a) concentrations at the surface. With the help of the model, the bottom layer DO concentrations in the region lacking in situ measurements were estimated using the observations near the buoys and the satellite‐derived Chl‐a concentrations. Comparisons between the modeled results and surveys conducted between 2006 and 2011 indicate that the error of the estimated extent of low‐oxygen bottom water was less than 26% and that the bias in the estimated minimum DO concentration was less than 0.5 mg L−1. Both buoy observations and modeled results indicate that the strength of water stratification and the amount of labile organic matter added to the bottom water are the two main factors that control the occurrence and the magnitude of seasonal low‐oxygen events off the Changjiang Estuary.
Synthesis of Fused Isoquinolinone and Iminoisoindolinone Derivatives via a Copper‐Catalyzed Regioselective Switching Process
Authors: Kavala Veerababurao , Wang Cheng‐Chuan , Wang Yu‐Hsuan , Kuo Chun‐Wei , Janreddy Donala , Huang Wen‐Chang , Kuo Ting‐Shen , He Chiu Hui , Chen Mei‐Ling , Yao Ching‐Fa 
Published: July 2014

AbstractCopper‐catalyzed base switching procedures for the synthesis of various fused isoquinolinone derivatives and iminoisoindolinone derivatives from the same starting materials have been developed. In these reaction sequences it is found that benzyl cyanide acts as a nucleophile in the presence of strong bases while it acts as a cyanide donor in the presence of weak bases. A wide substrate scope, good functional group tolerance, and handy reaction conditions are the important features of these protocols. Futhermore, using these protocols a wide variety of imidazolone‐fused isoquinolinone derivatives, pyrimidinone‐fused isoquinolinone derivatives, a diazapinone‐fused isoquinolinone derivative and iminoisoindolinone derivatives were accessed in excellent to moderate yields.magnified image
Catalytic Stereospecific Substitution of Enantioenriched Allylic Alcohols with Sodium Sulfinates
Authors: Ma Xian‐Tao , Dai Rui‐Han , Zhang Juan , Gu Yonghong , Tian Shi‐Kai 
Published: July 2014

AbstractAn unprecedented stereospecific substitution reaction of enantioenriched allylic alcohols with sodium sulfinates has been developed for the asymmetric synthesis of allylic sulfones with excellent ee. A range of highly enantioenriched allylic alcohols smoothly underwent palladium diacetate/racemic 2,2′‐bis(diphenylphosphino)‐1,1′‐binaphthyl‐catalyzed substitution with sodium sulfinates to give structurally diverse α‐chiral allylic sulfones in moderate to excellent yields with complete retention of configuration. This study paves the way for the direct stereospecific substitution of enantioenriched allylic alcohols with sulfur nucleophiles.magnified image
Sodium Alginate Fibers Containing Nanosilver
Authors: Pabjańczyk‐Wlazło Ewelina , Szparaga Grzegorz , Król Paulina , Skrzetuska Ewa , Wojtasik Krystian , Sieradzka Magdalena , Boguń Maciej , Rabiej Stanisław 
Published: July 2014

ABSTRACTThis article concerns the process of obtaining fibers made of sodium alginate containing nanosilver. The general objective was to select the proper forming parameters in order to obtain possibly high rates of tensile properties. The specific objective of this investigation was to determine the effect of basic forming parameters on the macroscopic structure, as well as the determination of the tensile, sorption, and resistivity properties of the obtained fibers. The porous structure and morphology studies were carried out by X‐ray diffraction WAXS. Cross‐sectional and surface analysis was carried out by SEM (scanning electron microscope) and AFM method (atomic force microscopy). SEM (Scanning electron microscope) + EDS (energy‐dispersive X‐ray spectroscopy) analysis was applied to assess the uniformity of distribution of nanoadditives on the fibers’ surface, and FTIR spectroscopy was applied to confirm the chemical structure of fibers. Within the framework of this article, the impact of specific nanoadditives on the properties of the obtained fibers was also examined.
New brain infarcts on magnetic resonance imaging after coronary artery bypass graft surgery: Lesion patterns, mechanism, and predictors
Authors: Nah Hyun‐Wook , Lee Jae‐Won , Chung Cheol‐Hyun , Choo Suk‐Jung , Kwon Sun U. , Kim Jong S. , Warach Steven , Kang Dong‐Wha 
Published: July 2014

ObjectiveNew brain infarcts after coronary artery bypass graft (CABG) are markedly more frequent than clinically evident stroke and have been proposed as a surrogate marker of postprocedural stroke. We sought to investigate the lesion patterns, mechanisms, and predictors of new brain infarction after CABG surgery.MethodsThis was a prospective pre‐ and postoperative brain magnetic resonance imaging (MRI) study in consecutive patients who underwent isolated CABG. Preoperative MRI included diffusion‐weighted imaging (DWI) and magnetic resonance angiography. DWI was repeated on postoperative day 3. Clinical variables, intraoperative findings, and laboratory findings were compared between patients with and without new brain infarcts on DWI.ResultsOf a total of 127 included patients, 35 (27.6%) showed new brain infarcts on DWI. Most lesions were clinically silent, located in the cortical territory (80%), small (<1.5cm) in diameter (89%), and not related to the underlying cerebral arterial abnormality (80%). Old age (odds ratio [OR] = 1.09, 95% confidence interval [CI] = 1.03–1.15), use of cardiopulmonary bypass (OR = 3.12, 95% CI = 1.13–8.57), a moderate to severe aortic plaque (OR = 21.17, 95% CI = 2.01–222.58), and high levels of high‐sensitivity C‐reactive protein (OR = 1.35, 95% CI = 1.08–1.70) were independent predictors of new brain infarction.InterpretationPost‐CABG new brain infarcts are mostly silent and cortically located. Old age, aortic arch atherosclerosis, use of cardiopulmonary bypass, and systemic inflammatory response may contribute to the pathogenesis of post‐CABG new brain infarcts. Ann Neurol 2014;76:347–355