bluuebunny/crossref_metadata_2025_split huggingface dataset:
On the curveYn=Xℓ(Xm+ 1) over finite fields
Authors: Tafazolian Saeed , Torres Fernando 
Published: January 2018

AbstractLet 𝓧 be the nonsingular model of a plane curve of typeyn=f(x) over the finite fieldFof orderq2, wheref(x) is a separable polynomial of degree coprime ton. If the number ofF-rational points of 𝓧 attains the Hasse–Weil bound, then the condition thatndividesq+1 is equivalent to the solubility off(x) inF; see [20]. In this paper, we investigate this condition forf(x) =xℓ(xm+1).
Multiple Frequency Ultrasounds Assisted Oil Sands Separation Technology
Authors: Liao Kaili , Ge Jijiang , Zhang Guicai , Fu Lipei 
Published: January 2018

Abstract
Ultrasound has a wide range of applications in oil sands separation industry due to its green and nopolluting characteristics. The combined ultrasounds technology has been widely used in many industries by virtue of the synergistic effect of cavitation effect; meanwhile, dual-frequency ultrasounds have been reported being used in lotion oil sands technology. Based on this idea, this study focuses on the application of multiple frequency ultrasounds in oil sands separation, and a comparative study has been conducted between the combined ultrasounds systems with the difference in the number of the ultrasound. The results show that the oil production rate of the samples treated by the lotion of sodium dodecyl benzene sulfonate (SDBS) and assisted by multiple frequency ultrasounds (96%) is significantly higher than that of the single frequency ultrasound (76%); the bigger the number of the ultrasound participating in the combination is, the higher the oil production rate of the oil sands is; the lower the frequency of the ultrasounds employed in the combined system is, the higher the oil production rate is. The optimum treating conditions for tri-frequency ultrasounds assisted technology are as follow: the treating time is 10-15 min, the treating temperature is 20-30°C, the concentration of surfactant in the lotion is 1.5 g/l, and the mass ratio of the lotion to oil sands is 1.8. In short, the use of multiple frequency ultrasounds can improve the oil production rate of oil sands, reduce the energy consumption during the separation process, and reduce the environmental contamination; therefore, multiple frequency ultrasounds assisted oil sands separation technology is a promising technology for oil sands resources exploitation with high efficiency.
Existence of a solution for a nonlocal elliptic system of (p(x),q(x))-Kirchhoff type
Authors: Taghavi Ali , Ghorbani Horieh 
Published: January 2018

Abstract
In this paper, we consider the system

\left\{\begin{aligned} &\displaystyle{-}M_{1}\bigg{(}\int_{\Omega}\frac{\lvert%
\nabla u\rvert^{p(x)}+\lvert u\rvert^{p(x)}}{p(x)}\,dx\biggr{)}(\Delta_{p(x)}u%
-\lvert u\rvert^{p(x)-2}u)=\lambda a(x)\lvert u\rvert^{r_{1}(x)-2}u-\mu b(x)%
\lvert u\rvert^{\alpha(x)-2}u&&\displaystyle\text{in }\Omega,\\
&\displaystyle{-}M_{2}\bigg{(}\int_{\Omega}\frac{\lvert\nabla v\rvert^{q(x)}+%
\lvert v\rvert^{q(x)}}{q(x)}\,dx\biggr{)}(\Delta_{q(x)}v-\lvert v\rvert^{q(x)-%
2}v)=\lambda c(x)\lvert v\rvert^{r_{2}(x)-2}v-\mu d(x)\lvert v\rvert^{\beta(x)%
-2}v&&\displaystyle\text{in }\Omega,\\
&\displaystyle u=v=0&&\displaystyle\text{on }\partial\Omega,\end{aligned}\right.

where Ω is a bounded domain in

{\mathbb{R}^{N}}

(

{N\geq 2}

) with a smooth boundary

{\partial\Omega}

,

{M_{1}(t),M_{2}(t)}

are continuous functions and

{\lambda,\mu>0}

.
We prove that for any

{\mu>0}

there exists

{\lambda_{*}}

sufficiently small such that
for any

{\lambda\in(0,\lambda_{*})}

the above system has a nontrivial weak solution.
The proof relies on some variational arguments
based on Ekeland’s variational principle, and some adequate variational methods.
Arbeitshandeln und der digitale Wandel von kleinen und mittleren Unternehmen
Authors: Huchler Norbert , Rhein Philipp 
Published: January 2018

ZusammenfassungDer Beitrag geht von der These aus, dass die technikgetriebenen Leitbilder des digitalen Wandels, wie sie im Zusammenhang der Vision „Industrie 4.0“ vertreten werden, die Potenziale des menschlichen Arbeitshandelns nicht bzw. nicht ausreichend berücksichtigen. Im Unterschied zu früheren Strategien der Technisierung, die auf die „menschenleere Fabrik“ zielten, werden zwar im Diskurs normative Markierungen zum Stellenwert des Menschen gesetzt, aber diese werden nicht funktional und empirisch untermauert, im Sinne der Leistung menschlichen Arbeitshandelns für Arbeitsergebnis und wirtschaftlichen Erfolg. Anhand einer empirischen Studie in produzierenden kleinen und mittleren Unternehmen wird exemplarisch gezeigt, welche funktionalen Leistungen menschliche Arbeitskraft erbringt, die durch digitale Technik zwar beeinträchtigt oder unterstützt, nicht aber ersetzt werden können. Aus den empirischen Ergebnissen werden zwei Schlüsse gezogen: Digitalisierungsleitbilder, die die funktionalen Leistungen menschlichen Arbeitshandelns nicht systematisch erfassen, sind insbesondere für kleine und mittlere Unternehmen dysfunktional. Und: Nicht die Digitalisierung als solche gefährdet menschliche Handlungsspielräume, vielmehr kann digitale Technik diese auch fördern; dazu kann und muss sie aber entsprechend gestaltet werden. Für ein entsprechendes Zusammenspiel von Mensch, Technik und Organisation in der digitalen Arbeit fehlen aktuell noch geeignete Konzepte und Lösungen.
Subjektive Aneignungspraktiken digitaler Technologien und die zugrunde liegenden Gerechtigkeitsansprüche der Beschäftigten
Authors: Walker Eva-Maria 
Published: January 2018

ZusammenfassungMit der Digitalisierung der Arbeitswelt wird die Frage nach einer humanen Gestaltung von Arbeit neu diskutiert. Der Beitrag zeigt anhand einer empirischen Fallstudie zur Implementierung eines digitalen Warenwirtschaftssystems („Shelvesfit“) in einem Handelskonzern, wie sich hierdurch Arbeitsinhalte verändern und ob – und wenn ja, wie – damit subjektive Ansprüche an „gute Arbeit“ verletzt werden. Als „gute Arbeit“ werden dabei jene Arbeitsbedingungen verstanden, die den Filialbeschäftigten in ihrer Selbsteinschätzung ein angemessenes Maß an Handlungsautonomie gewährleisten (das kann also auch heißen:keineHandlungsautonomie), um ihre Selbstansprüche an erfolgreiches Beraten und Verkaufen zu erfüllen. Die empirischen Befunde zeigen, dass die subjektiven Ansprüche der Beschäftigten an die Einführung der digitalen Technologie durchaus in Widerspruch geraten können mit den organisational intendierten Funktionen der Technologie, die Filialbeschäftigten sich die Technologie aber auf eine Art und Weise aneignen, dass sie das subjektiv als notwendig wahrgenommene Maß an professionellem Handlungsspielraum bewahren oder zurückgewinnen können, um in ihrer Wahrnehmung erfolgreich beraten und verkaufen zu können. Der Beitrag zeigt damit auch auf, wie eine kritische Arbeitsforschung in ihrer Analyse „guter Arbeit“ auch die subjektiven Ansprüche der Beschäftigten einbeziehen kann.
Comparison of hydrogen production in microalgae under autotrophic and mixotrophic media
Authors: Duangjan Kritsana , Nakkhunthod Watsamon , Pekkoh Jeeraporn , Pumas Chayakorn 
Published: January 2018

AbstractHydrogen is an alternative source of energy of considerable interest, because it is environmentally friendly. Biological hydrogen production processes involving green microalgae are of significant interest. However, until present only few microalgae genera have been studied and almost all of those studies have focused only on cultivation using mixotrophic or heterotrophic media, which are expensive, and can be easily contaminated. This study aimed to compare the potential of biohydrogen production from novel green microalgae under autotrophic and mixotrophic media. A total of ninety strains of six orders of green microalgae were investigated for their capabilities of hydrogen production. The results showed that eleven novel hydrogen-producing microalgae genera were found. The hydrogen production in each order was influenced by the medium. Moreover, several strains presented notable levels of autotrophic hydrogen production and performed at over twice of the mixotrophic medium. These results should be supportive information for the selection and cultivation of hydrogen-producing microalgae in further studies.
Analysis of the Polyphenols of Tobacco Using Pressurized Liquid Extraction (PLE) and Ultra Performance Liquid Chromatography With Electrospray Ionization – Tandem Mass Spectometric Detection (UPLC-ESI-MS/MS)
Authors: Shifflett John R. , Watson Leah , McNally Devin J. , Bezabeh Dawit Z. 
Published: January 2018

Summary
Polyphenols are chemicals found in tobacco that are affected by the method used to cure the leaf and, as a result, can be useful in the characterization of tobacco products. The purpose of this work was to develop an analytical method to investigate the levels of six polyphenols found in tobacco leaves and tobacco products: 3-O-caffeoylquinic acid (chlorogenic acid), 4-O-caffeoylquinic acid (cryptochlorogenic acid), 5-O-caffeoylquinic acid (neochlorogenic acid), kaempferol 3-O-rutinoside (nicotiflorin), quercetin 3-O-rutinoside (rutin), and 6-methoxy-7-hydroxycoumarin (scopoletin). Extraction conditions for sample preparation using PLE and instrument conditions for analysis by UPLC-MS/MS were optimized and validated. Results from the analysis of 30 cured tobacco leaves are presented and discussed in the context of each curing method represented. Results from the analysis of various tobacco products are also presented and trends observed across product types are discussed in the context of the applicability of the validated method. Total polyphenol levels for flue-cured, Oriental, and air-cured leaves were determined to be in the ranges of 18–41 mg/g, 5–27 mg/g, and 0.5–3 mg/g respectively. Similarly, cigarette polyphenol levels were found in the range of 4–16 mg/g and cigar polyphenol levels were less than 1.5 mg/g. The trends observed in the results for the tobacco leaf samples are consistent with expectations regarding the fate of polyphenols under the conditions commonly used in curing procedures. The results for the tobacco products demonstrate that the validated method can be used to study polyphenol content in cigarettes and a variety of cigar types including pipe tobacco cigars.
Accuracy of the Smoking Questionnaire
Authors: Sponsiello-Wang Zheng , de La Bourdonnaye Guillaume , David Morgane , Lüdicke Frank , Weitkunat Rolf 
Published: January 2018

Summary
The smoking questionnaire (SQ), a multidimensional questionnaire covering the major dimensions of cigarette smoking, was developed to address the heterogeneity in the assessment of smoking exposure. It consists of eight questions and can be completed within a few minutes. Test-retest reliability of the SQ and concurrent validity with the Behavior Risk Factor Surveillance System (BRFSS) 2011 questionnaire were examined in a clinical study conducted in adult US current menthol cigarette smokers. The SQ and the BRFSS were self-administrated twice before and after randomization with a 6-day interval. The inter-temporal analyses included current smokers aged 22 to 66 years who completed the SQ at both timepoints. The percent agreement of items and 95% confidence intervals were calculated for the comparisons between the two timepoints and between the SQ and the BRFSS questionnaire. To evaluate the feasibility of the SQ and to capture subjects’ opinions about the SQ, a meta-questionnaire was administrated. High test-retest reliability levels (percent agreement of > 70 to 100% between the two timepoints) were found for SQ smoking behavior items, in particular for items related to current smoking status, 100-cigarettes lifetime, regular smoking, age of initiation and preferred brand. Moderate (55% agreement) to high test-retest reliability (84% agreement) was found for daily consumption of manufactured cigarettes. The comparison between the SQ and the BRFSS 2011 showed a high concurrent validity (98 to 100% agreement). The SQ was completed on average in 3 to 4 min and was assessed as easy to use. The findings demonstrate that the SQ is reliable in smokers and a practical tool to assess smoking exposure in clinical studies.
Integrated and Differentiated Spaces of Triangular Fuzzy Numbers
Authors: Kirişci Murat 
Published: January 2018

AbstractFuzzy sets are the cornerstone of a non-additive uncertainty theory, namely possibility theory, and of a versatile tool for both linguistic and numerical modeling. Fuzzy sets have be- come popular in every branch of mathematics such as analysis, topology, algebra, applied mathematics etc. Thus fuzzy sets triggered the creation of a wide range of research topics in all areas of science in a short time. In this paper, we use the triangular fuzzy numbers for matrix domains of sequence spaces with infinite matrices. We construct the new space with triangular fuzzy numbers and investigate to structural, topological and algebraic properties of these spaces.
A shifted convolution sum for \mathrm{GL}(3) × \mathrm{GL}(2)
Authors: Xi Ping 
Published: January 2018

Abstract
In this paper, we estimate the shifted convolution sum

∑

n
⩾
1

λ
1

⁢

(
1
,
n
)

⁢

λ
2

⁢

(

n
+
h

)

⁢
V
⁢

(

n
X

)

,

\sum_{n\geqslant 1}\lambda_{1}(1,n)\lambda_{2}(n+h)V\Big{(}\frac{n}{X}\Big{)},

where V is a smooth function with support in

[
1
,
2
]

{[1,2]}

,

1
⩽

|
h
|

⩽
X

{1\leqslant|h|\leqslant X}

, and

λ
1

⁢

(
1
,
n
)

{\lambda_{1}(1,n)}

and

λ
2

⁢

(
n
)

{\lambda_{2}(n)}

are the n-th Fourier coefficients of

SL
⁢

(
3
,
𝐙
)

{\mathrm{SL}(3,\mathbf{Z})}

and

SL
⁢

(
2
,
𝐙
)

{\mathrm{SL}(2,\mathbf{Z})}

Hecke–Maass cusp forms, respectively.
We prove an upper bound

O
⁢

(

X

21
22

+
ε

)

{O(X^{\frac{21}{22}+\varepsilon})}

, updating a recent result of Munshi.
Ultrasonographic Examination of Some Vessels in Dogs and the Characteristics of Blood Flow in These Vessels
Authors: Figurová M. , Kulinová V. 
Published: January 2018

Abstract
The examination by Doppler ultrasonography provides haemodynamic information about blood flow velocity in a respective vessel. It specifies high- and lowresistance flow patterns. The aim of our study was to record the flow in a. carotis communis, a. femoralis and aa. renales in 16 adult clinically healthy dogs of small and medium size; characterize the types of vessels and also determine the pulsatility index (PI) and the resistive index (RI) of these vessels. The a. femoralis is a high-resistance vessel with a pronounced three-peak waveform. The aa. renales gives a typical picture of a low-resistance flow pattern. The characteristics of a. carotis communis involves different images of its branches a. carotis interna and a. carotis externa. In the investigated groups we observed a medium degree of pulsatility (atypical highresistance flow pattern with an absence of reverse flow). The mean measured values of indices for a. carotis communis were: left side PI 1.824 and RI 0.742; right side PI 1.891 and RI 0.746, and for aa. renales: PI 1.366 ± 0.04 and RI 0.684 ± 0.05.
Current state of art of satellite altimetry
Authors: Łyszkowicz Adam Bolesław , Bernatowicz Anna 
Published: January 2018

Abstract
One of the fundamental problems of modern geodesy is precise defi nition of the gravitational fi eld and its changes in time. This is essential in positioning and navigation, geophysics, geodynamics, oceanography and other sciences related to the climate and Earth’s environment. One of the major sources of gravity data is satellite altimetry that provides gravity data with almost 75% surface of the Earth. Satellite altimetry also provides data to study local, regional and global geophysical processes, the geoid model in the areas of oceans and seas. This technique can be successfully used to study the ocean mean dynamic topography. The results of the investigations and possible products of altimetry will provide a good material for the GGOS (Global Geodetic Observing System) and institutions of IAS (International Altimetry Service). This paper presents the achievements in satellite altimetry in all the above disciplines obtained in the last years. First very shorly basic concept of satellite altimetry is given. In order to obtain the highest accuracy on range measurements over the ocean improved of altimetry waveforms performed on the ground is described. Next, signifi cant improvements of sea and ocean gravity anomalies models developed presently is shown. Study of sea level and its extremes examined, around European and Australian coasts using tide gauges data and satellite altimetry measurements were described. Then investigations of the phenomenon of the ocean tides, calibration of altimeters, studies of rivers and ice-sheets in the last years are given.
A parameter choice strategy for a multilevel augmentation method in iterated Lavrentiev regularization
Authors: Zeng Chunmei , Luo Xingjun , Yang Suhua , Li Fanchun 
Published: January 2018

Abstract
In this paper we apply the multilevel augmentation method to solve an ill-posed integral equation via the iterated Lavrentiev regularization.
This method leads to fast solutions of discrete iterated Lavrentiev regularization.
The convergence rates of the iterated Lavrentiev regularization are achieved by using a certain parameter choice strategy.
Finally, numerical experiments are given to illustrate the efficiency of the method.
Stimuli of Collaboration in Product Development: A Case Study in a Project Manufacturing Company
Authors: Jääskeläinen Aki , Heikkilä Jussi , Hiidensalo Anna , Thitz Otto 
Published: January 2018

AbstractThere is already a wide acceptance on the importance of involving supplier and customer companies in product development. Decent understanding prevails on the relationship-oriented approach to product development including various collaboration forms. However, there is less research on the factors explaining the decision of attending to joint product development. In addition, less studies have examined the integrated role of both suppliers and customers in product development initiatives. This study searches answers to the following research questions: 1. What is the role of different actors in product development initiatives? 2. What factors motivate suppliers and customers to participate in product development? The research is carried out as an in-depth qualitative single case study in a large project manufacturing company. It takes the perspective of a focal company striving for product improvements. The first part of the empirical study consists of 15 semi-structured interviews. The second part includes two discursive workshops and builds upon the results of the interviews. This study contributes to the existing research by explaining the challenges and conditions facilitating joint product development with supplier and purchaser companies. The results highlight the role of customers in improving the effectiveness of product development. As a practical contribution, the paper reports the application of workshop method as a facilitator of collaboration between supplier, purchaser (focal company) and customer companies.
A Dual Perspective of Value in a Bundle of Product and Service
Authors: Safarpour Niusha , Sillanpää Ilkka 
Published: January 2018

AbstractFocusing on value creation in marketing has always been the key to success for companies. As a result, the definition, analysis and communication of value has gained importance. Companies are making an attempt to make a value proposition that is not only lucrative for the customer, but also has great returns for the company itself. Although this might sound simple on paper, since it is the basis for business logic, it is much more complicated in real life situations. With the service elements in the offering and the emergence of technologies such as smart and connected phenomenon, the business models become more innovative and more complexity is added to the analysis of value.The objective of this paper is to introduce a method for the dual perspective of value in a bundle of product and service in a smart and connected context. This method draws from the customer value and customer lifetime value concepts to offer an all-inclusive study on value. This assists companies in crafting an appealing value proposition in a cost-saving offering for a client that offers value to the company over its lifetime. This study specifically deals with the state of the arts smart and connected phenomenon and provides a view on how value works in that context.The framework created through this study serves to help the company choose a client that is of most value to the firm over the time of their cooperation. It then leads the company towards a better fabrication of the offering that is not only an attractive proposition to the client but also for the company. It gives a close insight onto where the benefit comes from and how a smart and connected bundle of products, services and relationships must be put together for maximum results in the modern age.
Biosorption of lead ions by cyanobacteria Spirulina platensis: kinetics, equilibrium and thermodynamic study
Authors: Zinicovscaia Inga , Yushin Nikita , Rodlovskaya Elena , Kamanina Inna 
Published: January 2018

Abstract
The potential use of dry Spirulina platensis biomass to remove lead ions from aqueous solution was investigated. Effects of various parameters such as contact time, temperature, dosage of biosorbent, initial pH, and initial concentration of lead were investigated in the batch adsorption mode. The highest lead removal of 5.7 mg/g was obtained at pH 5, biomass dosage of 0.5 g, initial lead concentration of 60 mg/L. The Langmuir and Freundlich models fit the experimental data (R2 > 0.99), while the kinetic data was best described using the pseudo second-order kinetic model (R2 > 0.99). FTIR spectra indicated that the metal removal takes place through binding to OH, C=O and P=O groups. Lead was efficiently recovered from biomass by mineral acids, while using CH3COOH and NaOH as eluents the biomass maintained high biosorption capacity during three cycles. This study demonstrates the potential of using Spirulina platensis as biosorbent to remove lead from industrial wastewater.
NMR spectroscopic properties of furo[2′,3′:4,5]pyrrolo[1,2-d][1,2,4]triazine derivatives
Authors: Zemanová Ivana , Gašparová Renata 
Published: January 2018

Abstract
The 1H and 13C NMR spectroscopic properties of a series of furo[2′,3′:4,5]pyrrolo[1,2-d][1,2,4]triazin-8(7H)-ones and -thiones were investigated. The influence of various electron donating as well as electron withdrawing substituents at C-5 or N-7 on 1H NMR chemical shifts as well as 13C chemical shifts at C8 were observed. The 5-chloromethyl group had a little influence on the chemical shift of H-7 proton and the 8-thione group causes deshielding of H-7 as well as H-5 protons in comparison with the C-8 carbonyl group.
Crystal structure of 2-(4-chlorophenyl)-2,3-dihydro-1H-perimidine, C17H13Cl1N2
Authors: Li Zhong-Yan , Zhang Min , Yuan Xian-You , Yuan Lin 
Published: January 2018

Abstract
C17H13Cl1N2, monoclinic, P21/c (no. 14), a = 7.830(2) Å, b = 26.688(8) Å, c = 7.362(2) Å, β = 115.366(3)°, V = 1390.1(7) Å3, Z = 4, R
gt(F) = 0.0604, wR
ref(F
2) = 0.1761, T = 296(2) K.
Balthasar Hubmaier: The Theologian of the Anabaptists. Nikolsburg and Catechetical Instruction: A Labor ofLove
Authors: Graffagnino Jason J. 
Published: January 2018

AbstractBalthasar Hubmaier is often called ‘the theologian of the Anabaptists’ for he was the only early Anabaptist leader with an earned doctorate. The former Catholic priest embraced the reforming thought of Erasmus, Zwingli, and eventually Zwingli’s former pupils (the Anabaptists) and led the Moravian city of Nikolsburg to become a bastion of Anabaptist thought and practice. The multi-dimensional religious landscape both afforded Hubmaier the opportunity and compelled him to author the first Anabaptist catechism. Through the work, Hubmaier articulated a clear and succinct portrayal of Anabaptist theology and ecclesiology summed up in the Erasmian tenet of the love of God and neighbor.