bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Practice of Decline Curve Analysis
Authors: Purvis D. C. 
Published: April 2016

Abstract
Though it is the oldest and most common of the six engineering techniques for the determination of reserves, both the theory and practice of decline curves continue to suffer from widespread misunderstanding and lackluster implementation. Decline curve analysis is not a curve-fitting exercise, and it should not be limited to a single rate-time graph of each well in isolation, much less just any rate-time graph created by the sloppy defaults of most graphing programs.
Decline curve analysis is an exercise in seeing, understanding and predicting the reservoir and operational dynamics. A practitioner should be adept at creating graphs from which she can identify reservoir dynamics, trace trends as precisely as possible and thus anticipate likely future behavior. Graphs should show only relevant data and show it clearly, without distraction. Multiple graphs examined in parallel often lead to better insights, though the graphs and their contents may vary among situations. Besides drawing on general experience, an evaluator often needs to examine the nearest and best analog production trends to make good forecasts. To do all this, the evaluator needs to be able to discriminate operational changes and to understand the uncertainty of the production data itself.
Mexico's Initiatives to Increase Oil Production and its Effect on North America Oil Production Outlook
Authors: Suarez Ricardo G. , Vazquez Alfredo Valdes , Roman Francisco J. , Rubio Francisco Pams 
Published: April 2016

Abstract
Mexico's oil production has been declining for the last decade. Therefore, the country has established strategies to increase oil production including the acquisition of new technology to produce unconventional reservoirs as well as the implementation of new regulations to enhance recovery rates from mature fields and develop the shallow-water and deepwater areas.
This paper presents a detailed analysis of Mexico's new hydrocarbons legislation with special focus on the contracting and bidding processes. This research also considers available data to identify the main technical challenges associated with the contractual areas which ultimately may be crucial in increasing oil production. Prospective production from main Mexican reservoirs was evaluated using a probabilistic method based on decline curve analysis (DCA) to forecast Mexico's oil production and its effect on North America oil production outlook.
The results of the technical evaluation of the contractual areas along with the analysis of the new policies indicate optimistic scenarios for the development of projects and a potential increase in oil production. These projects will foster offset decline of oil production by attracting experienced companies capable of facing current technical challenges and increasing upstream investment. Furthermore, areas of opportunity in the new regulations were identified to make the project conditions more attractive for companies and government. This study is built upon the exhaustive analysis of the new legislation and characteristics of the contractual areas in the context of the current internal and external factors to forecast Mexico's oil production scenario.
The Effect of Costs and Efficiencies on the Economic Viability and Resiliency of Production from Unconventional Reservoirs
Authors: Ozkan S. 
Published: April 2016

Abstract
Since mid-2014, crude oil prices have declined significantly. Many producing countries have large portions of their resource base uneconomic at the time of writing. However, after the fundamental imbalance between supply and demand is fixed, high storage levels are worked off, and demand for petroleum products continues to grow, the prices for crude oil will need to rise to incentivize production growth around the world. The United States has unlocked, through the shale revolution, a very economic resource base. Although current prices are not sustainable and increased prices will have to materialize to grow production volumes around the world, the required price does not need to be anywhere near the $100/Bbl levels previously observed. This is due to the amount of production that the United States can bring to the market at price levels below that. This paper provides insight into the amount of production that could be brought online in the United States at different crude oil price levels. It also studies the effects of cost efficiencies and natural gas prices on the volumes of crude oil that can be produced economically at different prices. The results show that the United States can grow production at a sufficient rate to track with demand growth at $65/Bbl WTI.
Unconventional Plays, Various Lithologies - Constant Stress Gradients
Authors: Parotidis Miltiadis , Hummel Nicolas , Graham Jordan , Wheeler Josephine , Pritchard Tim 
Published: April 2016

Abstract
Three onshore basins (called henceforth A, B, and C) in eastern Australia are discussed in this paper with the focus on geomechanics. Basin A is a coal seam gas play with a few thousand wells already drilled, and reservoir layers in the depth range of 300 to 1000 m, inter-bedded with impermeable clastics. Stress determination has been a key challenge as initial minifrac interpretations showed significant scatter in stress and pore pressure results. But with more consistent processing and interpretation constant effective stress ratios could be defined over large areas and depth sections. This helped also in interpreting microseismic data related to hydraulic fracturing – essential for economic production in areas of lower coal permeability - as reactivation of existing natural fractures seems to take place during injection. Basins B and C with tight formations as reservoir targets, in depths of about 4000 to 4600 m show overpressures that are difficult to directly measure and could only be constrained to lower values than mini frac test interpretations, after iteratively calibrating the geomechanical model and considering drilling data. This allowed a better understanding of thermal effects on progressing shear failure in openhole sections, due to increasing drilling mud fluids temperature with time; an effect that has to be considered in defining safe mud windows for drilling and operations phases. Although gradually a better understanding has been achieved, above unconventional fields still pose challenges, and current results will have to be considered as work in progress and not final. The key outcome of the geomechanics studies to date is: that a strike-slip stress regime applies, regionally and vertically; several depth intervals show constant effective stress ratios for both horizontal stresses, with some changes depending on location, and probably due to the structural differences.
Utilization of Drinking Water Treatment Slurry to Produce Aluminum Sulfate Coagulant
Authors: Fouad Mahmoud M. , Razek Taha M. A. , Elgendy Ahmed S. 
Published: April 2016

ABSTRACT: In Egypt, water treatment consumes about 365 000 tons of aluminum sulfate and produces more than 100 million tons of sludge per year. The common disposal system of sludge in Egypt is to discharge it into natural waterways. Toxicity of aluminum, environmental regulations and costs of chemicals used in water treatment and sludge treatment processes led to an evaluation of coagulant recovery and subsequent reuse. The present work aimed at aluminum recovery from sludge of El‐Shiekh Zayd water treatment plant (WTP) to produce aluminum sulfate coagulant. Sludge was characterized and the effect of five variables was tested and the process efficiency was evaluated at different operating conditions. Maximum recovery is 94.2% at acid concentration 1.5 N, sludge weight 5 g, mixing speed 60 rpm, temperature 60 °C and leaching time 40 min. Then optimum conditions were applied to get maximum recovery for aluminum sulfate and compared to commercial coagulant on raw water of El‐Shiekh Zayd (WTP).
Effect of Food Waste Co‐Digestion on Digestion, Dewatering, and Cake Quality
Authors: Higgins Matthew , Rajagopalan Ganesh , Miller Andre , Brown Jeffrey , Beightol Steven 
Published: April 2016

ABSTRACT: The objective of this study was to evaluate the effect of food waste addition on anaerobic digestion performance as well as downstream parameters including dewatering, cake quality, and filtrate quality. Laboratory‐scale digesters were fed processed food waste at rates of 25%, 45%, and 65% increased chemical oxygen demand (COD) loading rates compared to a control fed only primary and secondary solids. The specific methane yield increased from 370 L CH4/kg VSadded for the control to 410, 440, and 470 L CH4/kg VSadded for the 25, 45, and 65% food waste addition, respectively. The cake solids after dewatering were all higher for the food waste digesters compared to the control, with the highest cake solids being measured for the 45% food‐waste loading. Compared to the control digester, the biosolids odorant concentration increased for the lowest dose of food waste. Odorant concentrations were below detection for the highest food waste loading.
La protection de l'environnement dans les Terres australes et antarctiques françaises : le projet de création d'une réserve naturelle des terres australes
Authors: Sombetzki-Lengagne Delphine 
Published: April 2016

The isolation in the midst of a little clément océan confers on Southern Earth.
and French Antarctica (TAAF) an exceptional value but makes them so particularly sensitive to the outside disturbances. Texts relative to the environmental protection on the southern islands exist and the actions applied on the ground are real. However, the current division into zones to limited or prohibited access retums the complex, badly known and, thus, little respected System. The objective is to build the most effective and adapted legal framework to the threats which press on the environment. The creation of a nature reserve ofsouthern Earth may be a solution. Effective legal instrument for the management of the environment, the nature reserve fits both the institutional character of the Territory and the specificities of the French southern islands. However, the particular fragility of the environment according to sites makes necessary a management differentiated and adapted of the reserve. The geographic situation of French Southern Earth does not allow to dismiss the threats on the environment, the legal instrument of the nature reserve is a flexible and adaptable mean to their very particular situation. The scientific interest and the legal framework exist, the own unknown factor remains the political intention...
Santé et environnement en France : deux siècles de « symbiose » juridique (1802-2002)
Authors: Drouet Stéphane 
Published: April 2016

Entre la création du Conseil de salubrité de la Seine en 1802 et la promulgation de la loi du 4 mars 2002 sur la modernisation de la santé, il s'est écoulé deux cents ans au cours desquels le droit français a étroitement mêlé des dispositions sur la santé publique et la protection du milieu naturel. Le centenaire de la loi du 15 février 1902, grande charte sanitaire, a été l'occasion de rappeler ce phénomène de « symbiose » juridique.
Avec le recul du temps, il apparaît en effet que le droit de l'hygiène et de la salubrité publiques a servi de « matrice » à un droit de l'environnement qui ne naîtra que dans les années soixante et soixante-dix. Grâce à l'avancée des préoccupations écologistes depuis, celui-ci a permis de consolider durablement les bases du droit de la santé.
A l'aube du troisième millénaire, les juristes devront continuer à repenser l'organisation des soins autour des valeurs de l'écologie, et imaginer en quelque sorte un « écosystème de santé ».
THE JCMT GOULD BELT SURVEY: DENSE CORE CLUSTERS IN ORION B
Authors: Kirk H. , Johnstone D. , Francesco J. Di , Lane J. , Buckle J. , Berry D. S. , Broekhoven-Fiene H. , Currie M. J. , Fich M. , Hatchell J. , Jenness T. , Mottram J. C. , Nutter D. , Pattle K. , Pineda J. E. , Quinn C. , Salji C. , Tisi S. , Hogerheijde M. R. , Ward-Thompson D. ,   The JCMT Gould Belt Survey team
Published: April 2016

ABSTRACT
The James Clerk Maxwell Telescope Gould Belt Legacy Survey obtained SCUBA-2 observations of dense cores within three sub-regions of Orion B: LDN 1622, NGC 2023/2024, and NGC 2068/2071, all of which contain clusters of cores. We present an analysis of the clustering properties of these cores, including the two-point correlation function and Cartwright’s Q parameter. We identify individual clusters of dense cores across all three regions using a minimal spanning tree technique, and find that in each cluster, the most massive cores tend to be centrally located. We also apply the independent M–Σ technique and find a strong correlation between core mass and the local surface density of cores. These two lines of evidence jointly suggest that some amount of mass segregation in clusters has happened already at the dense core stage.
BEFORE THE BAR: KINEMATIC DETECTION OF A SPHEROIDAL METAL-POOR BULGE COMPONENT
Authors: Kunder Andrea , Rich R. M. , Koch A. , Storm J. , Nataf D. M. , Propris R. De , Walker A. R. , Bono G. , Johnson C. I. , Shen Juntai , Li Z.-Y. 
Published: April 2016

ABSTRACT
We present 947 radial velocities of RR Lyrae variable stars in four fields located toward the Galactic bulge, observed within the data from the ongoing Bulge RR Lyrae Radial Velocity Assay (BRAVA-RR). We show that these RR Lyrae stars (RRLs) exhibit hot kinematics and null or negligible rotation and are therefore members of a separate population from the bar/pseudobulge that currently dominates the mass and luminosity of the inner Galaxy. Our RRLs predate these structures and have metallicities, kinematics, and spatial distribution that are consistent with a “classical” bulge, although we cannot yet completely rule out the possibility that they are the metal-poor tail of a more metal-rich (

[
Fe

/

H
]
∼
−
1

dex) halo–bulge population. The complete catalog of radial velocities for the BRAVA-RR stars is also published electronically.
Two new species of Erythromelana Townsend, 1919 (Diptera: Tachinidae) from Area de Conservación Guanacaste in northwestern Costa Rica
Authors: Fleming AJ , Wood D. Monty , Smith M. Alex , Hallwachs Winnie , Janzen Daniel , Dapkey Tanya 
Published: April 2016

We describe two new species in the genus Erythromelana Townsend, 1919 from Area de Conservación Guanacaste (ACG) in northwestern Costa Rica. Both species were reared from wild-caughtcaterpillars of Eois spp. (Lepidoptera: Geometridae). We provide a concise description of each species using morphology, life history, molecular data, and photographic documentation.
Erythromelana jimmychevezi Fleming & Wood sp. nov.
Erythromelana glenriverai Fleming & Wood sp. nov.
Rediscovery and redescription of Centrodora damoni (Girault) (Hymenoptera: Aphelinidae) from Australia, an egg parasitoid of Gonipterus spp (Coleoptera: Curculionidae), after nearly a century
Authors: Ward Samantha , Valente Carlos , Gonçalves Catarina , Polaszek Andrew 
Published: April 2016

Centrodora is a relatively common and widespread genus of morphologically diverse species, and is the most polyphagous genus known within the Aphelinidae, attacking eggs of insects in addition to pupae of Diptera and Hymenoptera, and nymphs of Hemiptera (Polaszek 1991). There are currently about 60 valid species in the genus, but given its morphological and biological diversity, some elevation of species-groups and subgenera to genus-level might be useful in future. Centrodora is represented in Australia by twelve species (Noyes 2015).
Centrodora damoni (Girault) is redescribed and diagnosed from recently collected specimens reared from the eucalyptus weevil Gonipterus sp. near scutellatus Gyllenhal (Coleoptera: Curculionidae) from Tasmania, Australia. A lectotype is designated from a syntype specimen.
Improving the fatty acid profile in egg yolk through the use of hempseed (&lt;i&gt;Cannabis sativa&lt;/i&gt;), ginger (&lt;i&gt;Zingiber officinale&lt;/i&gt;), and turmeric (&lt;i&gt;Curcuma longa&lt;/i&gt;) in the diet of Hy-Line White Leghorns
Authors: Raza Tausif , Chand Naila , Khan Rifat Ullah , Shahid Muhammad Suhaib , Abudabos Alaeldein M. 
Published: April 2016

Abstract. A study was performed to examine the outcome of utilizing hempseed, ginger, and turmeric in the diet of Hy-Line White Leghorn on the fatty acid profile of egg yolk. Four experimental rations were offered to 60 laying hens: control (standard diet); 25 % hempseed (T1); 25 % hempseed and 2 % turmeric (T2); 25 % hempseed and 2 % ginger (T3). Thirty eggs per group were analysed on day 0, 15, and 30 after storage at room temperature. Individual and total fatty acids decreased significantly (P < 0.05) in the experimental groups by day 0, 15, and 30 compared to the control. By day 0, 15, and 30, total monounsaturated fatty acids, palmitoleic acid, and oleic acid decreased significantly (P < 0.05) in T3. In fresh eggs, polyunsaturated fatty acids (PUFAs) increased significantly in T2 and T3 and were lower in the control and T1 by day 15 and 30. The same trend was also found in linoleic, eicosadienoic, and arachidonic acid. Linolenic acid increased significantly (P < 0.05) in T2 and T3 by day 15 and 30. However, eicosatrienoic acid, eicosapentaenoic acid, and docosahexaenoic acid increased significantly (P < 0.05) in all treated groups compared to the control by day 15 and 30. By day 15 and 30, total ω-3 increased significantly in treated groups. In contrast to ω-3, ω-6 increased significantly in T2 and T3 by day 15 and 30, while their ratio decreased significantly in treated groups. From the results of the present study, it was concluded that the addition of hempseed at the level of 25 % combined with 2 % turmeric and ginger in the diet of Hy-Line White Leghorn layers improved the fatty acid profile of n-3 PUFA, ω-3, and ω-6 in egg yolk.
An individual subjectivist critique of the use of corpus linguistics to inform pedagogical materials
Authors: Richards Kendall , Pilcher Nick 
Published: April 2016

Corpus linguistics, or the gathering together of language into a body for analysis and development of materials, is claimed to be an assured, established method (or field) that valuably informs pedagogical materials and knowledge of language (e.g. Ädel 2010; Gardner & Nesi, 2013). The fundamental validity of corpus linguistics is rarely, if ever, critiqued. In this empirical paper we critically consider the foundations of corpus linguistics as being based on an abstract objectivist view of language. We critique this foundation through the lens of an individual subjectivist view of language. Our introduction outlines abstract objectivist and individual subjectivist views of language described by Voloshinov (1973). We then present what is claimed regarding corpus linguistics, and consider contemporary critiques of these claims . We then critique the foundations of corpus linguistics from an individual subjectivist view of language. We illustrate this critique by drawing on data from interviews and focus groups with content material lecturers and students in the subject areas of ‘Business’; ‘Nursing’; ‘Design’ and ‘Computing’. These data question the fundamental assumption about how corpus linguistics operates: that what is counted is indeed countable. The data show how ostensibly similar words are understood in very different ways with very different underpinning psychological elements. We argue that corpus linguistics thus informs pedagogical materials with a merely passive understanding of the language. This view can only gain access to the inert crust of previous language, because it removes language from its individual subjective context. This context is fundamental to giving language the conscious and psychological elements that underpin its use. We argue the language should be taught through dialogue in this subject context and not removed from it.
Is Performance Improvement possible by generating high levels of Focus in Individuals to create Flow?
Authors: Fisher Eddie John , Gonzalez Yorkys Santana , Fisher Eddie 
Published: April 2016

<p class="ber"><span lang="EN-US">The ability to improve performance levels at work through the development of flow has the potential to become a new management skill for managers. The outcome of this research suggests that managers can achieve higher performance levels in each of their team members. It is a necessary condition that they, for example, lead them by example, allow people to act within their abilities, show them how to mask distractions and create mental and emotional fitness within people’s minds. It appears that more than one component of flow is necessary to develop what is generally referred to as a state of flow. The outcome of this research suggests that the contribution flow makes to performance improvement can be measured through appropriate Key Performance Indicators (KPIs). </span></p>
Customer Service Responsiveness in Logistics Outsourcing Contracts: The Influence of Job Autonomy and Role Clarity among On-site Representatives
Authors: Bolumole Yemisi A. , Grawe Scott J. , Daugherty Patricia J. 
Published: April 2016

AbstractThis research examines the role of individuals in managing relationships between logistics service providers and their customers. Using self-determination theory's principles of psychological empowerment and employee stewardship, the study considers the autonomy of boundary spanners (implants) and the level of clarity in the individual's role and the resulting impact on implants' efforts toward customer service responsiveness. Survey responses were collected from implants in a logistics setting to test the proposed relationships. Findings show that as implants are given more autonomy in their job function and as the clarity of their roles increases, they are willing to become more responsive to customer needs. A discussion of the results and managerial implications are also offered.
Technology, Firm Size, and Safety: Theory and Empirical Evidence from the US Motor-carrier Industry
Authors: Cantor David E. , Corsi Thomas M. , Grimm Curtis M. , Singh Prabhjot 
Published: April 2016

AbstractThe purpose of this paper is to examine the relationship between motor-carrier firm size and safety outcomes. Leveraging insights from the resource-based view of the firm, we develop hypotheses regarding this important relationship. To test our hypotheses, we constructed an original commercial motor-carrier safety database, drawing on data from the Motor Carrier Management Information System and the Safety Measurement System. The results demonstrate that there is a significant and positive relationship between firm size and safety performance as measured through a carrier's number of crashes, unsafe driving violations, hours-of-service compliance, and vehicle maintenance violations. The impact of firm size on safety performance varies according to industry segment. This study has important academic and public policy implications.
The Balanced Theory of Port Competitiveness
Authors: Hales Douglas , Lee Lam Jasmine Siu , Chang Young-Tae 
Published: April 2016

Abstract
Due to weakening demand since the 2008 global recession, ports have had to reconsider how to compete differently to attract new business and new investors. Extant literature mainly focuses on either customer competitiveness or investor competitiveness. This study develops a new model of port competitiveness that simultaneously considers the effect of port strategy on customers and investors. This model is referred to as the “balanced theory of port competitiveness.” An analytical hierarchy process model builds on 10 factors that customers and investors consider important, and it is tested on 12 global seaports. The results show that port managers should consider the effect of their decisions among the factors because failure to do so can improve one factor of competitiveness while harming another. This study tests a theory that explains the behaviour of port managers and provides them with a practical guide to evaluate the effect of their decisions on customers and investors.