bluuebunny/crossref_metadata_2025_split huggingface dataset:
Overview on Super Strengthening Phenomenon Taking Place During Intensive Quenching of Steels
Authors: Kobasko N. I. , Aronov M. A. 
Published: June 2014

Abstract
This paper presents an overview on the super strengthening phenomenon that takes place during intensive quenching (IQ) of steels. It is shown that for obtaining an additional strengthening of material, one should pay special attention to whether the part cooling rate within the martensite range is high enough and whether compressive stresses are formed at the surface of steel parts. For hardening high carbon alloy steels with a low martensite start temperature, a two-step quenching procedure is recommended. At the first step of quenching, the martensite transformation is delayed, and, at the second step of quenching, the part cooling rate is accelerated within the martensite range. For hardening low and medium carbon steels, an IQ-3 quench method is recommended when a so-called direct convection cooling is applied for providing a maximal cooling rate within the martensite range and maximal compressive stresses at the surface of steel parts. To calculate a part cooling rate within the martensite range, a generalized equation is provided. Data on mechanical properties for different steels proving a presence of the super strengthening effect are provided also. A practical use of the super strengthening phenomenon is discussed in the paper.
Thyroidectomy in patients with a high BMI: a safe surgery?
Authors: Finel J B , Mucci S , Branger F , Venara A , Lenaoures P , Rodien P , Hamy A 
Published: June 2014

ObjectiveTo study and compare the specific postoperative complications of thyroidectomy in a population with a BMI ≥25 with a population having a BMI below 25.DesignA prospective study was carried out from September 2010 to January 2013.MethodsPostoperative calcemia, laryngeal mobility, bleeding or infectious complications, postoperative hospital stay, and operation time were studied and compared statistically by a χ2-test or Student's t-test.ResultsA total of 240 patients underwent total thyroidectomy and 126 underwent a partial thyroidectomy. Of them, 168 patients had a BMI below 25 and 198 patients had a BMI ≥25. There was no statistically significant difference in the occurrence of early or permanent hypoparathyroidism, recurrent laryngeal nerve palsy, bleeding complications, or postoperative duration of hospital stay. There was, however, a significant operative time in patients with a BMI ≥25.ConclusionDespite the longer operative time, thyroidectomy (total or partial) can be performed safely in patients with a BMI ≥25.
Quadruple Hydrogen Bonded Nanocarbon Networks for High Performance Dispersant-Free Conducting Pastes
Authors: Han Joong Tark , Jang Jeong In , Choi Sua , Seo Seon Hee , Jeong Seung Yol , Jeong Hee Jin , Lee Geon-Woong 
Published: June 2014

ABSTRACTColloidal dispersion of nanocarbon (NC) materials in dilute solutions or pastes is prerequisite for applications of NC-based electrodes from flexible electronics and flexible conducting fibers to electrochemical devices. Here, we show a straightforward method for fabricating NC suspensions with >10% weight concentrations in absence of organic dispersants. The method involves introducing supramolecular quadruple hydrogen bonding motifs into the NC materials without sacrificing the electrical conductivity.
Modeling dielectric-elastomer minimum-energy structures using dynamic relaxation with appropriate material behavior
Authors: Rhode-Barbarigos L. , Wagner S. , Adriaenssens S. 
Published: June 2014

ABSTRACTForm-finding describes the process of finding a stable equilibrium shape for a structure under a specific set of loading for a set of boundary conditions. Both physical (experimental) and numerical (computational) form-finding methods have been employed by structural engineers and architects for the design of shape-resistant structures: structures whose behavior depends mostly on their global spatial configuration and less on the properties of their individual components. The shape of dielectric elastomer minimum energy structures (DEMES) depends on the equilibrium between the pre-stressed elastomeric membrane and its inextensible frame. Therefore, DEMES can be modeled and analyzed using structural form-finding techniques. We applied dynamic relaxation (DR), a well-established explicit and efficient numerical form-finding and analysis method, to simulate DEMES equilibrium shapes and predict the elastic energy of DEMES. The DR-DEMES model shows generally good agreement with its physical implementation counterpart, as it captures the equilibrium shape and also the elastic energy in function of shape. However, we found that the numerical and the physical models differ in the pre-stress that is required to obtain a specific equilibrium shape. Therefore, in this study we introduce hyper-elasticity in the DR-DEMES model. With this refinement in physical parameters the DR-DEMES model approaches the pre-stress state of the physical DEMES implementation more closely, while it maintains the computational efficiency of the form-finding approach. We conclude that dynamic relaxation, with its low computational cost, is a powerful tool for the design of novel DEMES applications.
Multiattribute Seismic Analysis With Fractal Dimension and 2D and 3D Continuous Wavelet Transform
Authors: Saraswat Puneet , Raj Vijay , Sen Mrinal K. , Narayanan Arun 
Published: June 2014

Summary
The 3D post-stack seismic attributes provide an intuitive and effective way of using seismic volumes for reservoir characterization and development, and further identification of exploration targets. Some of the seismic attributes can aid in the precise prediction of the geometry and heterogeneity of subsurface geological settings. These also can provide useful information on petrophysical and lithological properties when combined with well-log information. There exist numerous seismic attributes that provide a unique interpretation on some aspects of subsurface geology. Of these, the proper demarcation of structural features— such as location and edges of faults and salt domes, and their throw and extent—always has been of primary concern. In this paper, we propose new multiattribute seismic algorithms by using fractal dimension and 2D/3D continuous wavelet transform (CWT). The use of higher-dimensional wavelets incorporates information from the ensemble of traces and can correlate information between neighboring traces in seismic data. The spectral decomposition that is based on the CWT aids in resolving various features of geological interest at a particular scale or frequency, which, when rendered with fractal attribute, demarcates the boundaries between those. We apply these two algorithms separately to a seismic amplitude volume and co-render output volumes together with some weights to yield a final attribute volume incorporating information from the aforementioned algorithms. We demonstrate the efficacy of these two algorithms in terms of the resolution and proper demarcation of various geological structures on real seismic data. The application of these algorithms results in better illumination and proper demarcation of various geological features such as salt domes, channels, and faults, and it illustrates how these simple tools can help to extract detailed information from seismic data.
Effect of Reservoir Heterogeneity on Primary Recovery and CO2 Huff ‘n’ Puff Recovery in Shale-Oil Reservoirs
Authors: Chen Cheng , Balhoff Matthew , Mohanty Kishore K. 
Published: June 2014

Summary
An equation-of-state (EOS) -based compositional reservoir simulator, UT-COMP, is used to simulate both primary recovery and carbon dioxide (CO2) huff ‘n’ puff recovery in a shale matrix typical of the Bakken formation, to investigate the effect of reservoir heterogeneity on hydrocarbon recovery. Nonaqueous components are carefully lumped into seven pseudocomponents. Permeability fields with various heterogeneity and correlation lengths are generated. UT-COMP is able to solve the compositional model, despite the permeability difference between the fracture and matrix being six orders of magnitude. The effects of both primary recovery and CO2 huff ‘n’ puff recovery depend significantly on reservoir heterogeneity. In primary recovery, the recovery factor can be fit by a two-parameter exponential formula; higher heterogeneity reduces the rate coefficient in the formula. Permeability fields with identical or similar heterogeneity have similar rate coefficients, even if the correlation lengths are different, which implies that the recovery depends primarily on heterogeneity and is insensitive to correlation length. Multiple-cycle CO2 huff ‘n’ puff processes are simulated in both homogeneous and heterogeneous reservoirs. Recovery rate in the production stage rises to a peak value much higher than that in the primary recovery, and then declines dramatically. The peak recovery rate decreases with increasing huff ‘n’ puff cycles, resulting from depleted reservoir pressure and hydrocarbons. The final recovery factor in the huff ‘n’ puff recovery is lower than that in the primary recovery, because the incremental recovery in the production stage is unable to compensate the loss in the injection and shut-in stages. Use of a longer shut-in time does not help increase the recovery rate in the production stage, because CO2 migration into the shale matrix is very limited because of the low matrix permeability. Reservoir heterogeneity leads to a faster decline of recovery rate in the production stage.
HPLC method with monolithic column for simultaneous determination of irbesartan and hydrochlorothiazide in tablets
Authors: Alanazi Amer M. , Abdelhameed Ali S. , Khalil Nasr Y. , Khan Azmat A. , Darwish Ibrahim A. 
Published: June 2014

Abstract
A simple, sensitive and accurate HPLC method with high throughput has been developed and validated for the simultaneous determination of irbesartan (IRB) and hydrochlorothiazide (HCT) in combined pharmaceutical dosage forms. The proposed method employed, for the first time, a monolithic column in the analysis. Optimal chromatographic separation of the analytes was achieved on Chromolith® Performance RP-18e column using a mobile phase consisting of phosphate buffer (pH 4)/acetonitrile (50:50, V/V) pumped isocratically at a flow rate of 1.0 mL min-1. The eluted analytes were monitored with a UV detector set at 270 nm. Under the optimum chromatographic conditions, linear relationship with a good correlation coefficient (R ≥ 0.9997) was found between the peak area and the corresponding concentrations of both IRB and HCT in the ranges of 10-200 and 1-20 ng mL-1. The limits of detection were 2.34 and 0.03 ng mL-1 for IRB and HCT, respectively. The intra- and inter-assay precisions were satisfactory as the RSD values did not exceed 3 %. The accuracy of the proposed method was > 97 %. The proposed method had high throughput as the analysis involved a simple procedure and a very short run- -time of < 3 min. The results demonstrated that the method is applicable in the quality control of combined pharmaceutical tablets containing IRB and HCT
Effect of selected catechins on doxorubicin antiproliferative efficacy and hepatotoxicity in vitro
Authors: Rudolfová Petra , Hanušová Veronika , Skálová Lenka , Bártíková Hana , Matoušková Petra , Boušová Iva 
Published: June 2014

Abstract
Catechins may influence both desirable and undesirable effects of many drugs. In this study, the in vitro effect of (+)-catechin, (-)-epicatechin, (-)-epigallocatechin, (-)-epicatechin gallate, and (-)-epigallocatechin gallate (EGCG) on the efficacy of anticancer drug doxorubicin (DOX) was studied in HCT-8 cancer cells. Rat hepatocytes were used to study the influence of EGCG on DOX hepatotoxicity. Cell proliferation and viability were studied by 3-[4,5-dimethylthiazol- 2-yl]-2,5-diphenyl tetrazolium bromide and neutral red uptake test assays. Formation of reactive oxygen species (ROS) was determined using the dichlorofluorescein assay. All of the studied catechins (1-25 μmol L-1) had no effect on the proliferation of intestinal cancer cells and did not affect the antiproliferative effect of DOX (1-8 μmol L-1) in these cells. Moreover, EGCG at 25 μmol L-1 increased the viability of isolated hepatocytes and significantly protected these cells against DOX-induced toxicity and ROS production. Consumption of EGCG during DOX therapy seems to be safe and beneficial, since EGCG does not decrease DOX anticancer efficacy and could ameliorate DOX hepatotoxicity
Antibacterial and quorum sensing regulatory activities of some traditional Eastern-European medicinal plants
Authors: Tolmacheva Anna A. , Rogozhin Eugene A. , Deryabin Dmitry G. 
Published: June 2014

Abstract
The objective of this study was to screen extracts of twenty Eastern European medicinal plants, using wild-type and reporter Chromobacterium violaceum bioassays, for novel components that target bacterial cells and their quorum sensing (QS) communication systems. Three types of activity and their combinations were revealed: (i) direct antimicrobial growth-inhibitory activity, (ii) non-specific and specific pro-QS activities, (iii) anti-QS activity. Among seven plant extracts showing direct growth-inhibitory activity, the strongest effect was shown by Arctostaphylos uva- -ursi (bearberry) leaves. Many plants stimulated violacein production by wild-type C. violaceum ATCC 31532 in a non-specific manner, and only the herb Bidens tripartita (three-lobe beggarticks) contained compounds that mimic acyl-homoserine lactone and operated as a QS agonist. Anti-QS activity was found in eleven plants including Quercus robur (oak) cortex, Betula verrucosa (birch) buds and Eucalyptus viminalis (Manna Gum) leaves. Subsequent statistical analysis showed differences between antimicrobial and anti-QS activities, whereas both activities were defined by phylogenetic position of medical resource plant. Finally, extract from Quercus robur cortex revealed at least two fractions, showing different anti-QS mechanisms. These data confirm that multicomponent anti-infectious mechanisms are used by plants, which may be useful for drug development
Galois covering and smash product of skew categories
Authors: Horobeţ¸ Emil 
Published: June 2014

Abstract
In this paper we give a new proof of the famous result of E. L. Green [3], that gradings of a finite, path connected quiver are in one-to-one correspondence with Galois coverings. Namely we prove that the inverse construction to the skew group construction has as many solutions as the number of different gradings on the starting quiver.
Existence and uniqueness of a periodic solution to certain third order nonlinear delay differential equation with multiple deviating arguments
Authors: Ademola Adeleke Timothy 
Published: June 2014

Abstract
In this paper, we use Lyapunov’s second method, by constructing a complete Lyapunov functional, sufficient conditions which guarantee existence and uniqueness of a periodic solution, uniform asymptotic stability of the trivial solution and uniform ultimate boundedness of solutions of Eq. (2). New results are obtained and proved, an example is given to illustrate the theoretical analysis in the work and to test the effectiveness of the method employed. The results obtained in this investigation extend many existing and exciting results on nonlinear third order delay differential equations.
Global annual average temperature – a precise modelling
Authors: Pal Satyabrata , Ghosh Arunava 
Published: June 2014

SUMMARY
Global annual average temperature (GAAT) is regarded as a precise indicator of the warming of the globe over the centuries, and its spectre is looming large with the passage of time and with the advancement of civilization. Global warming, caused by the accumulation of greenhouse gases in the atmosphere, has become the worst environmental threat to mankind. The phase 1981 to 2012 was the most crucial phase, and the impact of global warming in that phase indeed points to a disaster if not controlled now. Work on the building of appropriate models to represent the GAAT data can be found in the literature, although the precision levels (in terms of R2 values) of such models do not exceed 0.86. In this paper, six models are developed by using different combinations of mathematical functions. The developed models are superior to existing models in terms of their precision. In fact, to generate such models, extensive simulation work has been carried out not only with respect to the types of mathematical functions, but also with respect to the choices of initial values of the coefficients involved in each model. The models developed here have attained R2 values as high as 0.896.
Vector regression introduced
Authors: Mok Tik , Bâki Iz H. 
Published: June 2014

Abstract
This study formulates regression of vector data that will enable statistical analysis of various geodetic phenomena such as, polar motion, ocean currents, typhoon/hurricane tracking, crustal deformations, and precursory earthquake signals. The observed vector variable of an event (dependent vector variable) is expressed as a function of a number of hypothesized phenomena realized also as vector variables (independent vector variables) and/or scalar variables that are likely to impact the dependent vector variable. The proposed representation has the unique property of solving the coefficients of independent vector variables (explanatory variables) also as vectors, hence it supersedes multivariate multiple regression models, in which the unknown coefficients are scalar quantities. For the solution, complex numbers are used to rep- resent vector information, and the method of least squares is deployed to estimate the vector model parameters after transforming the complex vector regression model into a real vector regression model through isomorphism. Various operational statistics for testing the predictive significance of the estimated vector parameter coefficients are also derived. A simple numerical example demonstrates the use of the proposed vector regression analysis in modeling typhoon paths.
Textual Poaching, Gamekeeping and the Counter-stereotype
Authors: Halse Rolf 
Published: June 2014

Abstract
In the analogue era, fan studies explored localized resistance within fan communities’ cultural practices, examining how this might lead to new understandings of gender, sexuality, and race. However, there has been less work that examines the consequences fans’ cultural practices using digital media have for the cultural politics of ‘poaching’. The current article presents a study of online fans’ perceptions of positively depicted Muslim characters from the Middle East in the television serial, 24. Like the rest of the show’s regular cast, these characters should be in focus for fans in their competing interpretations and evaluations of each episode in online discussion forums. The study comprises a comparison of how two online fan communities, one in the US and one in Norway, perceive counter-stereotypical Muslim characters. An analysis of fans’ readings is carried out, and one central finding is that fans appropriated 24’s counter-stereotype in ways that can be described as reactionary.`
The Growth of Leading Regional Newspapers
Authors: Björkroth Tom , Grönlund Mikko 
Published: June 2014

Abstract
Theoretical research has modelled the existence of so-called advertising-circulation spirals of newspapers. The present article examines the existence and shape of the growth functions of circulation for leading regional newspapers in Finland, and assesses their effects on their competitors. The article also provides results on the household coverage of the regionally leading newspapers. Our results enable us to draw conclusions concerning the level of convergence of the market shares of the larger newspapers, and the possibilities of the minority newspapers to survive. The findings relate directly to the assessment of competition in the market of newspaper publishing, as economic analysis has already shown that difference in size between the two largest firms may define the scope for dominance. Consequently, the results may have implications for assessments of the relevant market and the state of the competition, and claims concerning dominance in newspaper markets
A Golden Decade
Authors: Fernández-Quijada David 
Published: June 2014

Abstract
The five countries of the Nordic region have a common cultural and historical background. In the field of communication, they share institutions, conferences, publications and networks. In order to reveal how this shared tradition is manifested in scientific communication, the present text analyses the evolution of publication patterns of Nordic communication scholars by applying bibliometric techniques to over five hundred articles published in international scientific journals from 2001 to 2010. Different parameters were analysed: institution and country of origin, number of authors, typology of collaborations, topics studied and the level of specialization.
During the decade under study, the presence of Nordic scholars in international journals doubled, manifesting the growing internationalization of Nordic communication research. Co-authorship patterns predominantly involve collaboration with Anglo-Saxon scholars, particularly North American. A high level of specialization was found in areas such as technologies and new media, which was reflected in the journals chosen as vehicles for publication
Selected Personality Traits of Women Training Combat Sports
Authors: Burdzicka-Wołowik Joanna , Góral-Radziszewska Katarzyna 
Published: June 2014

Abstract
Introduction. Contemporary women are more and more independent nowadays and emancipation of women is also visible in sports. The aim of the study was to present certain personality traits of female athletes training selected combat sports. The authors claim that taking up the aforementioned activity is an attempt at overcoming stereotypical attitude to a social role of women. The analysis of results revealed psychological profiles of female athletes. Material and methods. The research included women aged 17 to 36 (N=199). The first group (N=94) consisted of athletes training boxing, judo, wrestling and taekwon-do, the majority of whom had a master sports class. The second group included women not training any sports (N=105). The research was conducted with the use of the following tools: Psychological Gender Inventory, Temperament Inventory, Eysenck Personality Questionnaire (EPQ-R), Creative Behaviour Questionnaire and personal questionnaire created by the authors. Conclusions. The analysis of the material showed that female athletes training combat sports contest traditional femininity since they have more personality traits traditionally attributed to men (high level of masculinity). High psychoticism of the athletes is also perceived as a tendency to break conventions. As highly non-conformist individuals, they live according to their own system of values training sports which are stereotypically treated as masculine. Combat sports are trained by women with low emotional and sensory reactivity, which gives them advantageous position in sports competition.