bluuebunny/crossref_metadata_2025_split huggingface dataset:
Reconstruction of prograde and retrograde Chandler excitation
Authors: Zotov Leonid V. , Bizouard Christian 
Published: May 2015

Abstract
Observed polar motion consists of uniform circular motions at both positive (prograde) and negative (retrograde) frequencies. Generalized Euler–Liouville equations of Bizouard, taking into account Earth's triaxiality and asymmetry of the ocean tide, show that the corresponding retrograde and prograde circular excitations are coupled at any frequency. In this work, we reconstructed the polar motion excitation in the Chandler band (prograde and retrograde). Then we compared it with geophysical excitation, filtered out in the same way from the series of the Oceanic Angular Momentum (OAM) and Atmospheric Angular Momentum (AAM) for the period 1960–2000. The agreement was found to be better in the prograde band than in the retrograde one.
Generalized sensitivity functions for size-structured population models
Authors: Keck Dustin D. , Bortz David M. 
Published: May 2015

Abstract
Size-structured population models provide a popular means to mathematically
describe phenomena such as bacterial aggregation, schooling fish,
and planetesimal evolution. For parameter estimation, a generalized
sensitivity function (GSF) provides a tool that quantifies the impact
of data from specific regions of the experimental domain. This function
helps to identify the most relevant data subdomains, which enhances
the optimization of experimental design. To our knowledge, GSFs have
not been used in the partial differential equation (PDE) realm, so
we provide a novel PDE extension of the discrete and continuous ordinary
differential equation (ODE) concepts of Thomaseth and Cobelli and
Banks et al. respectively. We analyze a GSF in the context of size-structured
population models, and specifically analyze the Smoluchowski coagulation
equation to determine the most relevant time and volume domains for
three, distinct aggregation kernels. Finally, we provide evidence
that parameter estimation for the Smoluchowski coagulation equation
does not require post-gelation data.
On regularization and error estimates for the Cauchy problem
of the modified inhomogeneous Helmholtz equation
Authors: Hieu Phan Trung , Quan Pham Hoang 
Published: May 2015

Abstract
In this paper, we consider the modified inhomogeneous Helmholtz equation
Δu(x,y)

-

$-$

k
2

$k^{2}$

u(x,y)

=

$=$

f(x,y), x

∈

$\in$

ℝ

$\mathbb{R}$

, 0

<

$<$

y

<

$<$

1,
with inhomogeneous Cauchy data being given at y

=

$=$

0.
The problem is known to be ill-posed, as the solution (if exists) does not
depend continuously on the given data. We propose a regularization method to
obtain a stable approximate solution of the problem and get some error
estimates. Finally, a numerical example shows the effectiveness of the
proposed method.
Time-memory trade-offs for index calculus in genus 3
Authors: Laine Kim , Lauter Kristin 
Published: May 2015

Abstract
In this paper, we present a variant of Diem's

O
˜

(
q
)

${\widetilde{O}(q)}$

index calculus algorithm to attack the discrete logarithm problem (DLP) in Jacobians of genus 3 non-hyperelliptic curves over a finite field 𝔽
q
. We implement this new variant in C++ and study the complexity in both theory and practice, making the logarithmic factors and constants hidden in the O˜-notation precise.
Our variant improves the computational complexity at the cost of a moderate increase in memory consumption, but we also improve the computational complexity
even when we limit the memory usage to that of Diem's original algorithm. Finally, we examine how parallelization can help to reduce both the memory cost per computer and the running time for our algorithms.
A Note on the QMLE Limit Theory in the Non-stationary ARCH(1) Model
Authors: Arvanitis Stelios , Louka Alexandros 
Published: May 2015

AbstractIn this note we extend the standard results for the limit theory of the popular quasi-maximum likelihood estimator (QMLE) in the context of the non-stationary autoregressive conditional heteroskedastic ARCH(1) model by allowing the innovation process not to possess fourth moments. Depending on the value of the index of stability, we either derive
Amplitude and phase synchronization of European business cycles: a wavelet approach
Authors: Bruzda Joanna 
Published: May 2015

AbstractIn the paper we suggest the use of amplitude correlation coefficients (ACCs) and phase-locking values (PLVs) in examining business cycle synchronization. The quantities are calculated on the basis of instantaneous amplitudes and phase differences, which are computed here with the help of the non-decimated discrete analytic wavelet transform. We show that the coefficients constitute an interesting add-in to the statistical apparatus of examining business cycle synchronization. The PLVs correct the information provided by the coherency and correlation coefficients for the influence of amplitude changes and are of use in examining phase synchronization of business cycles, which is important in forecasting the effectiveness of a common monetary policy. By contrast, the ACCs are based solely on amplitude information and have the interpretation of phase-adjusted correlation coefficients, which can be used to evaluate stabilization policies or to forecast these policies’ effectiveness. The methodology is applied to examine cyclical synchronization of 20 European Union (EU) countries. We show, among other things, that during the run-up to the euro both amplitude and phase synchronization increased, with the former tending to change more rapidly. Furthermore, for the new EU members an EU effect is identified in both types of cyclical synchronization with the euro area.
Theoretical Studies of the Local Structures and EPR Parameters for the Rhombic Cu2+ Center in Cu0.5Zr2(PO4)3 Phosphate
Authors: Chao-Ying Li , Ying Huang , Qiu Tu 
Published: May 2015

Abstract
The local structure of the rhombic Cu2+ center in Cu0.5Zr2(PO4)3 phosphate is investigated by using the high-order perturbation formulas of electron paramagnetic resonance (EPR) parameters, g-factors g

i
(i=x, y, z), and hyperfine structure constants A

i
for 3d9 ions in rhombically elongated octahedral symmetry. According to the studies, the local axial distortion angle Δα (≈ 5.1°) and the planar bond angle θ (≈ 83.8°) in [CuO6]10- cluster was obtained. The theoretical EPR parameters based on the aforementioned local structure parameters show good agreement with the observed values, and some improvement have been made as compared with the previous studies.
Characterization of Na and Ca Zeolites Synthesized by Various Hydrothermal Treatments of Fly Ash
Authors: Koshy Nevin , Singh D. N. , Jha Bhagwanjee , Kadali Srinivas , Patil Jayant 
Published: May 2015

Abstract
For the past several decades, researchers have studied the zeolitization of coal fly ash (class-F) by following different methods (viz., open and closed hydrothermal, and fusion followed by hydrothermal). In fact, these methods involve sequential processes like (i) dissolution of silica and alumina from the fly ash, (ii) nucleation of zeolite, and (iii) crystallization (growth of zeolite) in the reactant solution. Also, performance of these processes has been reported to vary with the type of alkali used as reactant and often, NaOH has been preferred for high cation exchange capacity, resulting in sodium zeolites. However, large scale applications of Na-based zeolites in soil and water are questionable due to the presence of high sodium, thereby increasing the sodicity and salinity of the soil/water. In addition, performance of the zeolites, as adsorbent, synthesized by different methods is expected to depend on various characteristics (viz., mineralogy, structural bonding, specific surface area, pore volume, and morphology), of the zeolites. In order to address the above issues, the present study is focused to investigate the various characteristics of the synthesized zeolites by (i) the above mentioned three methods, (ii) using Ca(OH)2 as reactant, and (iii) considering Na and Ca present in the fly ash. Thus, the aim of the study was to ascertain (i) a suitable method out of the three and (ii) characteristics of the blend of Na- and Ca-zeolites from the fly ash, which can be used as a controlled release fertilizer, as sorbent for water and soil decontamination.
Viscosity Index Tables for Celsius Temperatures
Authors: Wright W. A. , Talbot A. F. , Manning R. E. 
Published: May 2015

Description
Convenient reference tables for obtaining calculated Viscosity Index vales obtained from basic kinematic values (in centistokes) given in ASTM Standard D 2270 and in Standards on Viscosity Tables for Kinematic Viscosity Conversions. Kinematic viscosity values at 40 and 1000 degrees are given.
Compilation of Odor and Taste Threshold Values Data
Authors: Stahl W. H. 
Published: May 2015

Description
TThis report is truly the result of a committee effort. The editor would like to express his sincere appreciation for the efforts of the very many members of ASTM Committee E-18, too numerous to list separately who, over the several years of preparation for this publication, have given freely of their time. A significant number of the compounds reported on have been given to us from the personal files of Dr. Birger Drake of the Swedish Institute for Food Preservation Research. In particular, he would like to extend special thanks to Mr. Harry McDaniel of the Proctor and Gamble Company for his extensive help in the keypunching of this information. Prof. John Powers of the University of Georgia was particularly helpful in assisting in the writing of the introduction
List of Fluorescent Whitening Agents for the Soap and Detergent Industry
Authors:   ASTM Committee D12
Published: May 2015

Description
By far, the largest single consumer of Fluorescent Whitening Agents (FWAs) is the soap and detergent industry. In the past, the identification of these products in test methods, publications, customs declarations, etc. has been primarily limited to individual supplier's trade names which often create confusion and ambiguity. Although several of the products are included in the Colour Index, this compilation is incomplete and, in some instances, inaccurate.
Handbook of Reference Data for NonDestructive Testing
Authors: Mordfin Leonard 
Published: May 2015

Description
For the first time in one convenient handbook -- NDT reference data for the experienced and knowledgeable professional practitioner.
This unique book provides the NDT practitioner with the reference data needed to carry out on-site work properly. The data are provided in tables, charts, graphs, and equations that are compiled from many books and standards. This is the only volume that brings such diverse information together for the first time in one convenient handbook for the experienced and knowledgeable professional, without extraneous text and tutorial material. This resource will help the NDT professional to plan and to carry out on-site tests that are likely to produce reliable results.
Since a substantial amount of NDT work is carried out in the field, (e.g. power plants, ships, bridges, pipelines, etc) it will be especially beneficial to have these reference data in one easy-to-carry volume, that can be kept in your toolbox.
Audience: An invaluable reference tool for the NDT professionals, Level I and II technicians, and Level III certificate holders.
Design of a Pseudo-Interval Autonomous SCPT System
Authors: Baziw Erick , Verbeek Gerald 
Published: May 2015

Abstract
Seismic cone penetration testing (SCPT) is a geotechnical tool which allows for the determination of low strain (&lt;10−4%) in situ compression (VP) and shear (VS) wave velocities. Among in situ engineers, there is considerable interest in the development and advancement of SCPT systems, which operate autonomously without any user interaction aside from initial start-up. This technical note outlined such a system (a pseudo-interval autonomous SCPT system), and covered in detail the autonomous sensor based data triggering algorithm, which is an essential element of an autonomous system that can be used both onshore as well as offshore.
Median-lower normal levels of serum thyroxine are associated with low triiodothyronine levels and body temperature in patients with central hypothyroidism
Authors: Hirata Yu , Fukuoka Hidenori , Iguchi Genzo , Iwahashi Yasuyuki , Fujita Yasunori , Hari Yusuke , Iga Makiko , Nakajima Shinsuke , Nishimoto Yuki , Mukai Miki , Hirota Yushi , Sakaguchi Kazuhiko , Ogawa Wataru , Takahashi Yutaka 
Published: May 2015

ObjectiveAlthough it has been recommended that serum free thyroxine (FT4) levels should be targeted to middle-upper normal levels during levothyroxine (l-T4) replacement therapy in patients with central hypothyroidism (CeH), the rationale has not been clarified.MethodsA retrospective single-center study enrolled 116 patients with hypothyroidism (CeH,n=32; total thyroidectomy (Tx),n=22; primary hypothyroidism (PH),n=33; and control benign thyroid nodule (C),n=29). The patients had receivedl-T4therapy at the Kobe University Hospital between 2003 and 2013. They were stratified according to serum FT4level (≥1.10 or <1.10 ng/dl), and body temperature (BT), serum free triiodothyronine (FT3) levels, FT3/FT4ratio, and lipid profiles were compared. The effect of GH replacement therapy on thyroid function was also analyzed.ResultsFT3levels and FT3/FT4ratios were significantly lower in patients with CeH than in patients with PH (P<0.05) or C (P<0.05). In patients with FT4<1.10 ng/dl, BT was significantly lower in patients with CeH (P=0.002) and Tx (P=0.005) than in patients with PH, whereas no differences were found in patients with FT4≥1.10 ng/dl. In patients with CeH, FT3levels were higher in those with GH replacement therapy (P=0.018).ConclusionIn CeH, patients with median-lower normal levels of serum FT4exhibited lower serum FT3levels and lower BT. These results support the target levels of serum FT4as middle-upper normal levels duringl-T4replacement therapy in patients with CeH.
A nemi szerepet konzerváló vezetői magatartás észlelt igazságossága a szervezeti kultúra és az észlelő szexista hozzáállásának a függvényében
Authors: Dallos Andrea , Kovács Judit 
Published: May 2015

A tanulmányban bemutatott vizsgálat célja, hogy feltárja a segítségnyújtás nemiszerep-elvárásokkal összhangban lévő vagy ellentétes megjelenésének, vagy elmaradásának, valamint az erre a megnyilvánulásra adott vezetői reakciónak az észlelt helyességét. A személy nemének, a segítségnyújtás megjelenésének és a helyzetre adott vezetői válasznak a manipulációján (jutalmazó/büntető, illetve semleges válasz) túl a helyzet kontextusaként szolgáló szervezeti kultúrának, illetve a szexista nézetek válaszadó általi támogatottságának a hatását is figyelembe vettük.
Kérdőíves vizsgálatunkban 310 nő és ő5 férfi vett részt. A válaszadók egy rövid munkahelyi szituációt olvashattak, melyben manipuláltuk az előzőekben megnevezett tényezőket. Ezt követően a kitöltők megítélték a szereplő és a vezető viselkedésének észlelt helyességét, továbbá kitöltötték az ambivalens szexizmust mérő skálát.
Eredményeink szerint a válaszadók a segítségnyújtást annak elmulasztásánál egyöntetűen helyesebbnek látták, megítéléseikre a kezelt független változók nem hatottak. A vezető semleges válasza esetén a versengő/maszkulin szervezeti kultúráról olvasók, valamint a magasabb szexizmussal jellemezhető válaszadók igazságosabbnak észlelték a férfi szereplő irányába mutatott semleges vezetői reakciót, míg a női szereplővel szembeni semlegességet kevésbé helyeselték, ezzel elfogadva a hagyományos nemi szerepek konzerválását. Ezzel szemben a vezető büntető/jutalmazó reakciója esetén a kevésbé szexista válaszadók, valamint a támogató/feminin szervezeti kultúráról olvasók, a nemi szerepeket megfordító vezetői viselkedést helyeselték, a női szereplő megjutalmazását, valamint a férfi szereplő megbüntetését.
Antireflection coatings for solar panel power output enhancement
Authors: Pethuraja Gopal G. , Welser Roger E. , Zeller John W. , Puri Yash R. , Sood Ashok K. , Efstathiadis Harry , Haldar Pradeep , Harvey Jennifer L. 
Published: May 2015

ABSTRACTThe impact of nanostructured broadband antireflection (AR) coatings on solar panel performance has been projected for a broad range of panel tilt angles at various locations. AR coated films have been integrated on test panels and the short-circuit current has been measured for the entire range of panel tilts. The integration of the AR coatings resulted in an increase in short-circuit current of the panels by eliminating front sheet reflection loss for a broad spectrum of light and wide angle of light incidence. The short-circuit current enhancement is 5% for normal light incidence and approximately 20% for off-angle light incidence. The National Renewable Energy Laboratory (NREL) System Advisor Model (SAM) predicts that this AR coating can yield at least 6.5% improvement in solar panel annual power output. The greatest enhancement, approximately 14%, is predicted for vertical panels. The AR coating’s contributions to vertical mount panels and building-integrated solar panels are significant. This nanostructured broadband AR coating thus has the potential to lower the cost per watt of photovoltaic solar energy.
The Cost and Reduction Risk of Cemented-Back Monobore Well Construction
Authors: Miller Guindon Leah 
Published: May 2015

Summary
To help operators reduce costs and improve efficiency when working in the Cardium formation of central Alberta, this study of 360 completed wells details the evolution of well construction for openhole horizontal wells and provides cost and operational comparisons between drilling different wellbore sizes, running different casing sizes, and using different stage tools to cement from the heel of the well back to surface.
Optimizations in the Design and Operation of an Offshore Hydraulic Pumping System
Authors: Kpodo F. K. 
Published: May 2015

ABSTRACT
This paper presents an overview of the design and operation of an offshore hydraulic pumping system on UNOCAL's Platform Eva when it was converted from a power oil to a power water system in 1983. Also described is useful economic and operational information obtained from UNOCAL's experience with the system since the switchover.
The new system exhibits several special features in the design and operation of an offshore hydraulic power water system. Emphasis was placed on maximizing operational efficiency, cost reduction, safety, and the efficient use of deck space. Platform Eva was refitted with canned electrical submersible pumps, designed within the constraints of limited deck space, electrical switchgear rating, and power fluid properties. An evaluation was performed leading to the selection of produced water as power fluid over fresh water and sea water. Guidelines for good power water quality have been established by UNOCAL's Research Department, specifying fluid solid content, oil content, and lubricity level. A new oil field filter has been introduced and used successfully to achieve the required power water quality and improved downhole pump life. In a joint effort with pump manufacturers, the normal downhole pump life has been improved over 100% with metallurgical and mechanical improvements in the standard pump system. Severe problems with tubing leaks occurred shortly after the switchover from oil to water. These problems were traced to small amounts of CO2 breaking out at low pressures in the turbulent regime of the fluid stream and were eliminated. Failure of splash zone coating caused by thermal stresses and improvements there of are also described.
Despite optimizations that improved operational efficiency of the power water system, a comparative analysis of the old and the new systems shows several economical and operational advantages of using power oil over power water as a hydraulic power fluid. The power oil system, however, is potentially a higher safety risk.
Platform Well Tieback Procedures at Island Esther
Authors: Jackson E. M. 
Published: May 2015

ABSTRACT
On March 2, 1983, Island Esther, a man-made drilling and producing island located 1-1/2 miles offshore Southern California was destroyed by a severe winter storm. The ninety completed wells survived the storm; however, some were badly damaged. Two years later, a platform has been erected over these wells and the task of connecting the wells to the structure will soon begin. The following paper will discuss the methods and equipment that will be used for this operation.
Half-Century of Heavy Oil Polymer Flooding from Laboratory Core Floods to Pilot Tests and Field Applications
Authors: Saboorian-Jooybari H. , Dejam M. , Chen Z. 
Published: May 2015

Abstract
Reservoir development is increasingly moving towards the heavy oil resources due to the rapid decline in conventional oil reserves. With the production of conventional low gravity crude oil being surpassed by heavy oil production in Alberta, the vast fields of heavy oil have been considered an emerging source of energy to the growing demands for oil and gas. Although the applications of thermal methods have been successful in many enhanced oil recovery (EOR) projects, they are usually uneconomic or impractical in deep and thin pay zones reservoirs. Therefore, polymer flooding is a preferred EOR technique in such reservoirs.
An application of polymer flooding in heavy oil reservoirs dates back to more than half a century ago. However, it has long been considered a suitable method for reservoirs with viscosities up to 100 centipoises only. Recently, this EOR technique has attracted great attentions and become a promising method for oil recovery from heavy oil reservoirs with viscosities ranging from several hundreds to several thousands of centipoises. The main reasons for such a widespread application of the technique in heavy oil reservoirs during the last two decades have been rises in oil prices, extensive use of horizontal wells and advances in the polymer manufacturing technology. This paper aims to review the advances and technological trends of polymer flooding in heavy oil reservoirs since the 1960s. Upon the review, complete data sets of the laboratory works, pilot tests and field applications are established. The database provides qualitative description and quantitative statistics regarding both scientific research and practical applications. Then suitable ranges of some crucial affecting reservoir properties and polymer characteristics for successful field applications are examined. Finally, new screening criteria are developed specifically for heavy oil reservoirs based on an analysis of the data. The criteria are compared with the previously established ones. The outcome of this paper can be used as guidelines for screening, planning, design and eventually implementation of future projects.