bluuebunny/crossref_metadata_2025_split huggingface dataset:
Der modulare Lebenszykluskosten-Baukasten
Authors: Müller Andreas , Choudry Saphir , Bornschlegl Martin , Mantwill Frank 
Published: August 2017

Kurzfassung
Durch den permanenten Kostendruck fokussieren sich Unternehmen zunehmend auf Folgekosten der Produktion. Gerade in einer komplexen Produktionsumgebung der Automobilindustrie spielt die Kostenbeherrschung entlang des Lebenszyklus eine wichtige Rolle. Die Berechnung der Lebenszykluskosten stellt dabei eine große Herausforderung dar, da aktuelle Normen hierzu nur unzureichend Methoden beschreiben. Der folgende Ansatz des modularen Lebenszykluskosten-Baukastens stellt eine Strukturierung von Methoden zur Kostenbewertung vor.
Inkrementelle elektromagnetische Umformung
Authors: Linnemann Maik , Scheffler Christian , Kurka Petr , Psyk Verena , Landgrebe Dirk 
Published: August 2017

KurzfassungDie Herstellung kleiner Losgrößen bedeutet häufig einen hohen Zeit- und Kostenaufwand im Vergleich zu den erzielten Einnahmen. Mit der Kombination von inkrementeller und elektromagnetischer Umformung wurde ein geeignetes Verfahren zur Überwindung dieser Herausforderungen untersucht. Es wurden passende Fertigungsparameter identifiziert und eine gute Übereinstimmung zwischen Simulation und Experiment nachgewiesen.
Identification and characterization of microsatellite loci in the tuliptree, Liriodendron tulipifera (Magnoliaceae)
Authors: Gutiérrez‐Ozuna Ricardo , Hamilton Matthew B. 
Published: August 2017

Premise of the study:Twenty‐three polymorphic microsatellite loci (simple sequence repeats) were identified and characterized for Liriodendron tulipifera (Magnoliaceae), a species native to eastern North America, to investigate its genetic diversity, population structure, and mating system.Methods and Results:Using Illumina HiSeq paired‐end reads from genomic DNA, searches for repeat motifs identified approximately 280,000 potentially amplifiable loci. Of 77 loci tested, 51 amplified consistently. When genotyped using 30 to 52 total adult trees from three old‐growth populations in Maryland, Virginia, and New Jersey, USA, 23 loci were polymorphic. These loci exhibited four to 13 alleles, and observed and expected heterozygosities ranged from 0.233 to 0.865 and 0.272 to 0.876, respectively.Conclusions:The microsatellite marker loci presented here will be valuable in population genetic studies of L. tulipifera because they do not suffer from ascertainment bias and show high polymorphism.
A Gaia-PS1-SDSS (GPS1) Proper Motion Catalog Covering 3/4 of the Sky
Authors: Tian Hai-Jun , Gupta Prashansa , Sesar Branimir , Rix Hans-Walter , Martin Nicolas F. , Liu Chao , Goldman Bertrand , Platais Imants , Kudritzki Rolf-Peter , Waters Christopher Z. 
Published: August 2017

Abstract
We combine Gaia DR1, PS1, Sloan Digital Sky Survey (SDSS), and 2MASS astrometry to measure proper motions for 350 million sources across three-fourths of the sky down to a magnitude of

. Using positions of galaxies from PS1, we build a common reference frame for the multi-epoch PS1, single-epoch SDSS and 2MASS data, and calibrate the data in small angular patches to this frame. As the Gaia DR1 excludes resolved galaxy images, we choose a different approach to calibrate its positions to this reference frame: we exploit the fact that the proper motions of stars in these patches are linear. By simultaneously fitting the positions of stars at different epochs of—Gaia DR1, PS1, SDSS, and 2MASS—we construct an extensive catalog of proper motions dubbed GPS1. GPS1 has a characteristic systematic error of less than 0.3

and a typical precision of 1.5–2.0

. The proper motions have been validated using galaxies, open clusters, distant giant stars, and QSOs. In comparison with other published faint proper motion catalogs, GPS1's systematic error (

) should be nearly an order of magnitude better than that of PPMXL and UCAC4 (

). Similarly, its precision (∼1.5

) is a four-fold improvement relative to PPMXL and UCAC4 (∼6.0

). For QSOs, the precision of GPS1 is found to be worse (∼2.0–3.0

), possibly due to their particular differential chromatic refraction. The GPS1 catalog will be released online and be available via the VizieR Service and VO Service.
An Intensive Continuity Clinic Immersion Experience for Interns: A Springboard to Confidence and Satisfaction With Continuity Clinic
Authors: Dulay Maya , Laponis Ryan , O'Brien Bridget C. , Gupta Reena , Ramanan Radhika A. , Julian Katherine 
Published: August 2017

ABSTRACT

Background
Providing a robust continuity clinic experience is difficult due to uneven distribution of resident time. Immersion experiences early in training may improve residents' learning experiences.

Objective
We designed and implemented a continuity immersion experience to improve internal medicine interns' satisfaction and confidence with their outpatient skills, and we evaluated the timing of the experience and its benefits for learners.

Methods
Two cohorts of interns at 1 academic institution participated in a 3-week immersion block (during the first or second quarter of the intern year). Interns were surveyed twice about satisfaction and confidence. Analysis included independent and paired sample t tests to compare interns' responses pre- and postimmersion, and to evaluate effects over time.

Results
A total of 124 interns completed the immersion, with a survey response rate of 61%. Interns' self-rated confidence on a 5-point Likert scale improved significantly compared with preimmersion in the areas of medical knowledge and confidence with their electronic health record and communication skills (P ≤ .010 for all assessments). Interns reported high satisfaction with continuity clinic following immersion (cohort 1: 4.5 ± 0.54; cohort 2: 4.3 ± 0.68; on a 5-point scale with 5 = very satisfied). Improvements in knowledge, skills, and satisfaction in cohort 1 were sustained over 3 months.

Conclusions
A 3-week immersion experience in the first 6 months of residency improved interns' confidence in ambulatory content areas and satisfaction with clinic.
Entangled histories
Authors: van Nederveen Meerkerk Elise 
Published: August 2017

Abstract
In this article I investigate changing household labour relations and women’s work in the Dutch empire. I question how colonial connections affected the division of work between men, women, and children, not only in the colony – the Dutch East Indies (i.c. Java), but also in the metropolis – the Netherlands. Entanglements can be found in the influences of colonial economic policies on both colony and metropolis, as well as in the more indirect effects of colonial exploitation and taxation, and, finally in the sphere of sociopolitics and ideologies. I will analyse the entanglements between the Netherlands and Java in these domains, comparing similarities and differences, but also paying attention to the connections and transfers between both parts of the Dutch empire. Although some of the conditions and developments were highly specific to the Dutch empire, I aim to show that the method of comparing and establishing direct and indirect connections between different parts of an empire can lead to new insights that can also be applied to other parts of the world and different time periods.
From "Looking for Alibrandi" to "Does my Head Look Big in This?": The role of Australian teenage novels in reconceptualising racialised-gendered identities
Authors: Zannettino Lana 
Published: August 2017

This paper undertakes a comparative analysis of three Australian teenage novels – Melina Marchetta’s ‘Looking for Alibrandi’ (1992), Randa Abdel-Fattah’s ‘Does my Head Look Big in This?’ (2005), and Morris Gleitzman’s ‘Girl Underground’ (2004). Drawing from feminist post-structural and post-colonial theories, the paper examines how each author has constructed the racialised-gendered identities of their female protagonists, including the ways in which they struggle to develop an identity in-between minority and dominant cultures. Also considered is how each author inter-weaves race, gender and class to produce subjects that are positioned differently across minority and dominant cultures.
The similarities in how the authors have inscribed race and ethnicity on the subjectivities of their female characters, despite the novels being written at different points in time and focusing on different racial and ethnic identities, suggest that what it means to be a raced subject in Australia has more to do with the significance of all-at-once ‘belonging’ and ‘not belonging’ to the dominant culture, of ‘inclusion’ and ‘exclusion’ and of ‘sameness’ and ‘otherness’, than it has with the unique characteristics of biological race and ethnic identification. The paper argues that this kind of fiction carries with it an implicit pedagogy about race relations in Australia, which has the potential to subvert oppressive binary dualisms of race and gender by demonstrating possibilities for the development of hybrid cultural identities and ‘collaborations of humanity’.
Limits of Longitudinal Bending of C900 PVC Pipe
Authors: Winn Laurence B. 
Published: August 2017

AbstractData mining of the geographic information systems and asset management databases of a large water utility; field measurement of installed joint deflection; and a review of applicable AWWA standards and manufacturers' recommendations reveal alarming discrepancies between field practice and the limits of longitudinal bending for C900 polyvinyl chloride (PVC) pipe. Several case studies support these results. It is shown that quantitative quality control is required to ensure compliance with standards, but is largely absent from design considerations and field operations. Further investigation shows that installer cost exposure without the use of longitudinal bending is on the order of 1 to 8%, depending on required conformance to an ideal arc. The author concludes that PVC's combination of flexibility and low fracture resistance contributes to a record of abuse by installers and consequent low reliability, at least in the location studied. Proposed conditions for the controlled use of PVC are presented.
A Guidebook of Carbonate Laws in China and Kazakhstan: Review, Comparison and Case Studies
Authors: Liang Yu , Yuan Bin 
Published: August 2017

Abstract
As two of the most important oil and gas players in the world, China and Kazakhstan are experiencing similar CO2 issues related to oil and gas industry. Both countries have been benefiting from oil and gas industry, and striking to reduce the impacts of CO2 emission at the same time. The problem is how to increase the profits while decreasing the CO2 emissions, not only from technical perspective, but also from policy / legislation / permitting perspectives. However, currently there are few studies focusing on the oil and gas laws for these two countries. The objective of this study is to systematically review and compare oil and gas law frameworks, carbonate management, fiscal structures, and taxation systems between China and Kazakhstan.
Therefore, this paper first discusses in details about oil and gas laws in China and oil and gas laws in Kazakhstan, respectively; then a comparison study is conducted between these two countries. In addition, field cases with their fiscal statements are introduced and analyzed to explore the profitability of an oil company in those two counties under CO2 regulation. Finally, advantages and disadvantages of their law frames and fiscal systems are analyzed and discussed.
The royalty rate, taxation and bonuses in China are set in reasonable range subject to applicable laws. The disadvantages of Chinese oil and gas laws system lie in that (1) a windfall tax ranging from 20% to 40% with a threshold of $55/bbl is set in the fiscal system, which can prevent further investment when oil price is high; (2) the clauses and terms in contract system are not flexible enough; (3) an R factor (Columbian model) should be introduced to protect investment when oil price is low and government can receive more revenue when oil price is high; (4) NOC has the right to take over the production operations at any time once the foreign companies have recovered all costs with reasonable reimbursement based on the book values of tangible costs; (5) remittance policy is strict; (6) lack of the incentive for oil and gas industry to decrease CO2 emissions. By contrast, the royalty rate and taxation in Kazakhstan are set within a reasonable range subject to applicable laws. However, according to available and reliable sources, the royalty and bonuses are all negotiable. There is a trend that Kazakhstan government will decrease the relevant taxes rates and extend the tax-exempt range in order to encourage more carbonate investments.
Risk Based Approach to Identify the Leakage Potential of Wells in Depleted Oil and Gas Fields for CO2 Geological Sequestration
Authors: Zulqarnain Muhammad , Zeidouni Mehdi , Hughes Richard G. 
Published: August 2017

Abstract
The selection of depleted oil and gas fields as potential CO2 geological storage sites has both positive and negative aspects that need to be considered. The positives are that the storage capacity or pore volume can be reliably estimated from field's production history, and reservoir characterization can be performed with more readily available well, log or seismic data without additional expenses. The main drawback is the presence of wells in the field, as each well may provide a leakage pathway for injected CO2. The leakage potential of a well is a function of its proximity to injection wells, cement coverage in the potential storage zone, well abandonment conditions including cementing of the annular space, and the nature of any barriers to prevent CO2 leakage to the surface. Qualitative and quantitative risk-based approaches can be used to identify the wells that have comparatively higher leakage probabilities in comparison to other wells. The objective of this study is to use a risk-based approach to identify and categorize wells based on their leakage potential in depleted oil and gas fields. This will not only help in planning injection strategies but may also help in selection of remediation strategies. The model may be presented well by using the Fault Tree Analysis (FTA) technique. It implements screening criteria and a tier-based approach in which wells are screened and categorized into different tiers based on different well characteristics. The well characteristics include the physical distance from injection wells, the quality and portion of cement coverage of wells in the target zone, the regulations at the time of well completion, the leakage potential of sealing barriers for the targeted zone, the number of overlying shale and sand intervals and leakage of either CO2 or brine to shallower wells, the nature and quality of permanent or temporary well abandonment procedures, and the quality and length of annular space covered with cement for shallower well casings or sections. Existing models for well leakage are used to quantitatively estimate the leakage rate. The risk of leakage is presented qualitatively and quantitatively in the form of leaked CO2 volume to shallow aquifers or to the atmosphere. The approach is used for a representative depleted oil and gas field in southern Louisiana to show an example application of the process. The developed model provides a means to systemically identify the wells that are more likely to leak and have high consequences. Due to the reduced order nature of the tool, it should prove to be a useful tool in the planning and execution phase of the CO2 sequestration process.
Feasibility of Near Miscible Flooding By Production Gas Rejection with Varying CO2 Content in Qinhuangdao Oilfield
Authors: Chen Hao , Zhang Xiansong , Li Baozhen , Mei Yuan , Tang He , Wang Shuai 
Published: August 2017

Abstract
A newly discovered offshore oilfield in QHD 29-2 block is facing the problem of selecting the appropriate developing method. It covers approximately 2300 km2 and with an average water depth of 27.6m. The depth of the exploration well is over 3600 m with thick sand layer and oil zone. Conventional waterflood cannot be implemented due to the reservoir characteristics of small pores and throats, complex lithology, strong heterogeneity and low water injectivity. Near-miscible flooding is proposed considering the wide range of CO2 content (24–90 mol%) in the production gas.
Slim tube test and slim tube simulation are conducted successively to determine the minimum miscible pressure (MMP) of the production gas and oil samples from the targeted reservoir. The relationship of displacement efficiency (DE), interfacial tension (IFT) and displacement pressure are provided and chosen as the basis for the division of the pressure interval of near-miscible flooding. The lower limit of the CO2 content in the production gas to achieve near-miscible flooding are determined for the well 29-2E-5 with the well depth of 3308-3330 m. On this basis, an adjustment measures of adding intermediate components of (C2-C6) is proposed and assessed. The amount of the adding components is calculated and provided correspondingly.
Boundaries of the pressure region of near-miscible flooding are obtained for different CO2 contents. Considering the reservoir conditions (112.1 °C, 31.96 MPa), the lower CO2 content of 64% is estimated to be able to achieve near-miscible flooding for the targeted well. Accordingly, 2.3, 6.5, and 10.3 mol% of (C2-C6) are determined to be the lowest amounts for the adding components to achieve near-miscible injection for the CO2 contents of 55%, 40%, and 24%, respectively.
Thus, the evaluation of the feasibility and optimization measures of near-miscible flooding by production gas re-injection with varying CO2 content in a newly discovered offshore reservoir was conducted. Specific regions in the vicinity of MMP for impure CO2 near-miscible flooding on the basis of comprehensive analysis of displacement efficiency and IFT from the views of both engineering and physicochemical were determined.
Development and Evaluation of an Iridium Oxide Based Chemical Sensor for Downhole CO2 Monitoring
Authors: Wang Sai , Ling Kegang , Liu Ning , Wang Hongsheng 
Published: August 2017

Abstract
Geological carbon sequestration represents a long-term storage of CO2, in which large-scale CO2 is injected into the subsurface geologic formations, such as the deep saline aquifers or depleted oil and gas reservoir. In the CO2 sequestration process, the injected CO2 is expected to remain in the reservoir and not to migrate to the earth surface. To better understand the CO2 movement undersurface and obtain real time information in carbon sequestration, an iridium oxide-based Severinghaus-type CO2 chemical sensor was constructed and tested in this study.
The CO2 sensor was designed and constructed based on the intersection inspiration from electrochemistry idea. The principle of the CO2 sensor design is dramatically rely on the pH detection of the electrolyte solution which generated by the hydrolysis process of CO2. The developed CO2 sensor includes a couple of Iridium-Oxide electrodes. To meet the working purpose, iridium oxide nanoparticles was prepared and electrodeposited for the thin IrO2 film generation on the surface of metal substrate. The other critical parts, such as a thin gas-permeable silicone membrane, a porous metal supporting material, and the bicarbonate-based electrolyte solution are prepared for the sensor's preparation. The assembled sensor was tested in aqueous solution with different CO2 concentrations. Then the sensor was settled in harsh, high-pressure environments, in order to invest the performance of the CO2 sensor under reservoir conditions.

Introduction
The definition of CO2 sequestration was the whole process of the CO2 capture and the CO2 long-term storage [1]. It had been treated as a potential method to decelerate the accumulation process of greenhouse gas which generated from the fossil fuels burning and other source [2]. While for the geologic sequestration, it means to put the captured CO2 in the geological formation for the aim of long-term storage.
Numerical Simulation and Performance Evaluation of CO2 Huff-n-Puff Processes in Unconventional Oil Reservoirs
Authors: Cao Mengjing , Wu Xiaodong , An Yongsheng , Zuo Yi , Wang Ruihe , Li Peng 
Published: August 2017

Abstract
Unconventional oil, such as tight oil and shale oil, has become one of the most significant contributors of oil reservoirs and production growth. Due to low porosity and ultra-low permeability, unconventional oil reservoirs require multistage hydraulic fracturing technique to maximize production. However, the primary recovery remains very low to narrow the profit margin heavily. Although CO2 huff-n-puff process holds great potential to increase oil recovery and has a chance to sequester CO2 to reduce environmental footprint, our current knowledge of the performance of this process is very limited.
With numerical simulation, we performed a series of sensitivity work to present the impacts of reservoir properties, fracture properties and operation parameters such as CO2 injection rate, injection time, soaking time, number of cycle of CO2 on enhanced oil recovery in the tight oil formation. What's more, the method of analysis of variance (ANOVA) was used to evaluate the performance of CO2 huff-n-puff process and beneficial result from CO2 EOR technology. Simulation results showed that bottom hold pressure and injection cycles impose more significant impose on oil recovery increment than injection time, injection rate and production time per cycle. Based on the typical reservoir and fracture properties from tight oil reservoir, the numerical models were established to evaluate the performance of four EOR methods: CO2 huff-n-puff, water huff-n-puff, nanofluids huff-n-puff and water alternating gas (WAG). With the comparison of oil recovery and its increment of four EOR methods and depletion method, it is found that CO2 huff-n-puff method would lead to much more incremental oil recovery than other three methods, which reveals its huge potentials of enhancing oil recovery and improving development profit in unconventional reservoirs. The conclusion of this work has the potential to advance our understanding of the role of CO2 in developing unconventional oil reservoirs, which will benefit both energy economy and environment with CO2 geological sequestration.