bluuebunny/crossref_metadata_2025_split huggingface dataset:
A plea for quality in internship programmes – evidence from the business and administration students’ experience
Authors: Goia Simona , Marinaș Cristian Virgil , Igret Ramona Ștefania 
Published: May 2017

Abstract
The career of business students is nowadays definitely influenced by their involvement in different internships and volunteering activities. The internship programmes help them understand the context of business organisations and decide what field of activity is most suitable for their professional life. However, sometimes internship programmes are not very well organised and influence in a negative manner students′ final perception of a certain domain. Our research identified and analysed the main factors that might influence the quality of an internship programme from students′ perspective. The quantitative analysis relies on a questionnaire based survey among over 450 students from one of the most prestigious universities in Romania in the field of economics and business administration. By running factor analysis, we identified five factors which mainly determine the quality of internships: Job arrangements, Mentorship and employability benefits, Learning content, Academic supervision, Bureaucracy and accessibility. Subsequently we measured through multiple regression the way the identified factors influence the quality of the internships. We consider that the results of the study are relevant not only for academics but also for students and business organisations that have the power and instruments to improve internship programmes and the entire experience for all stakeholders involved.
On analytic functions with generalized bounded Mocanu variation in conic domain with complex order
Authors: Mahmood Shahid , Ul-Haq Wasim , Arif Muhammad 
Published: May 2017

Abstract
The aim of present article is to introduce and study new subclasses in conic regions. These classes unifies several known classes studied by various well-known authors. Many interesting properties including sufficiency criteria, arc length problem, distortion results are investigated for these newly defined subclasses.
Three-variable symmetric and antisymmetric exponential functions and orthogonal polynomials
Authors: Bezubik Agata , Hrivnák Jiří , Patera Jiří , Pošta Severin 
Published: May 2017

Abstract
The common exponential functions whose exponents are the scalar products 〈λ,x〉, where x is a real variable and λ is an integer, admit two generalizations to any higher dimension, the symmetric and the antisymmetric ones [KLIMYK, A.—PATERA, J.: (Anti)symmetric multivariate exponential functions and corresponding Fourier transforms, J. Phys. A: Math. Theor. 40 (2007), 10473–10489]. Restriction in the paper to the three variables only allows us to work out many specific properties of the symmetric and antisymmetric functions useful in applications. Such are (i) the orthogonalities, both the continuous one and the discrete one on the 3D lattice of any density; (ii) corresponding discrete and continuous Fourier transforms; (iii) generating functions for the related polynomials in three variables, and others. Rapidly increasing precision of the interpolation with increasing density of the 3D lattice is shown in an example.
Positive solutions of nonlocal integral BVPS for the nonlinear coupled system involving high-order fractional differential
Authors: Zhao Kaihong , Gong Ping 
Published: May 2017

Abstract
In the paper, we investigate a class of four-point integral boundary value problems for the nonlinear coupled system involving higher-order Caputo fractional derivatives and Riemann-Stieltjes integral boundary conditions. By employing Guo-Krasnoselskii fixed point theorem, some sufficient conditions are obtained to guarantee the existence of at least one or two positive solutions for this system. Meanwhile, the eigenvalue intervals of existence for positive solutions are also given. As applications, some examples are provided to illustrate the validity of our main results.
Semi-equivelar maps on the torus and the Klein bottle with few vertices
Authors: Kumar Tiwari Anand , Kumar Upadhyay Ashish 
Published: May 2017

Abstract
Semi-equivelar maps are generalizations of maps on the surfaces of Archimedean solids to surfaces other than the 2-sphere. The well known 11 types of normal tilings of the plane suggest the possible types of semi-equivelar maps on the torus and the Klein bottle. In this article we classify (up to isomorphism) semi-equivelar maps on the torus and the Klein bottle with few vertices.
A problem considered by Friedlander & Iwaniec and the discrete Hardy-Littlewood method
Authors: Nowak Werner Georg 
Published: May 2017

AbstractFollowing Friedlander & Iwaniec [FRIEDLANDER, J. B.—IWANIEC, H.:Summation formulae for coefficients of L-functions,Canad. J. Math.57(2005), 494—505], the objective of this note are the coefficientsanof the Dirichlet series forL(s,χ1)L(s,χ2)L(s,χ3) whereχ1,χ2,χ3are primitive Dirichlet characters with modulesD1,D2,D3. For∑n≤xan$\sum\limits_{n\le x}a_n$, withxlarge, sharp asymptotics are established which are uniform inD1,D2,D3. To this end, the modern method for the estimation of exponential sums, due to [HUXLEY, M. N.:Area, Lattice Points, and Exponential Sums,LMS Monographs, New Ser.13, University Press, Oxford, 1996] and others, is applied with gain.
Crystal structure of N
2,N
6-bis(1-hydrazinyl-2-methyl-1-oxopropan-2-yl) pyridine-2,6-dicarboxamide, C15H23N7O4
Authors: Amr Abd El-Galil E. , Khalifa Nagy M. , Al-Omar Mohamed A. , Ghabbour Hazem A. 
Published: May 2017

Abstract
C15H23N7O4, orthorhombic, Aba2, a = 18.4956(11) Å, b = 23.9806(16) Å, c = 8.1572(5) Å, V = 3618.0(4) Å3, Z = 8, R
gt(F) = 0.0521, wR
ref(F
2) = 0.1144, T = 293(2) K.
Crystal structure of cis-bis((1H-benzimidazol-2-yl)methanol-κN,O)-bis(isothiocyanato-κ
N)nickel(II), C18H16N6NiO2S2
Authors: Yun Zhang , Youzhu Yu , Weiyun Shi , Aimin Wei , Fengli Wang 
Published: May 2017

Abstract
C18H16N6NiO2S2, monoclinic, C2/c (no. 15), a = 14.935(3) Å, b = 8.5054(17) Å, c = 16.268(3) Å, β = 109.45(3)°, V = 1948.5(8) Å3, Z = 4, R
gt(F) = 0.0243, wR
ref(F
2) = 0.0669, T = 293(2) K.
Crystal structure of methyl (E)-2-(4-(diethylamino)-2-hydroxybenzylidene)hydrazine-1-carboxylate, C13H19N3O3
Authors: Lv Lu-Ping , Lv Wei-De , Rao Jun-Feng , Chen Jia-Yi 
Published: May 2017

Abstract
C13H19N3O3, monoclinic, P21/c (no. 14), a = 11.594(5) Å, b = 11.311(5) Å, c = 11.688(5) Å, β = 117.347(19)°, V = 1361.4(10) Å3, Z = 4, R
gt(F) = 0.0479, wR
ref(F
2) = 0.1630, T = 296 K.
A metagenomic approach to discover a novel β-glucosidase from bovine rumens
Authors: Suwan Eukote , Arthornthurasuk Siriphan , Kongsaeree Prachumporn T. 
Published: May 2017

Abstract

β-Glucosidases play an important role in biomass degradation as they hydrolyze cellobiose to glucose in a final step of cellulolysis. In particular, ruminant animals rely on β-glucosidases from rumen microorganisms for conversion of plant cellulosic materials into glucose. In this study, we are interested in characterization of a novel β-glucosidase from rumen microorganisms. However, most rumen microorganisms are obligate anaerobes, which require special cultivation conditions. Presently, the metagenomic techniques, which enable isolation and characterization of microbial genes directly from environmental samples, have been applied to overcome these problems. In this study, the sequence-based screening approach was successfully applied to identify a novel β-glucosidase gene, Br2, from a bovine rumen metagenomic sample. A 1338-bp complete coding sequence of Br2 encodes a 51-kDa GH1 β-glucosidase of 445 amino acid residues with 59% sequence identity to a β-glucosidase from Cellulosilyticum ruminicola JCM 14822. The recombinantly expressed Br2 exhibited an optimal activity at pH 6.5 and 40°C, reflecting its rumen bacterial origin, and relatively higher catalytic efficiencies toward glucoside and fucoside substrates than other glycosides, similar to many previously reported bacterial β-glucosidases. Our sequence-based screening approach can be applied to identify other genes of interest from environmental samples.
Morphometric abnormalities in the spleen of the progeny of mice fed epigallocatechin during gestation and nursing
Authors: Bałan B.J. , Skopińska-Różewska E. , Skopiński P. , Zdanowski R. , Leśniak M. , Kiepura A. , Lewicki S. 
Published: May 2017

Abstract
It is very difficult to cure pregnant females suffering from infections, because of the risk which might occur during treatment by several, even herbal, medications. Many of these substances, among them extracts from plants, have antimicrobial, anti-inflammatory and immunostimulatory properties owing to their polyphenols content, but also may reveal unwanted effects on the fetal development because of their anti-angiogenic properties. The aim of the present study was to elucidate whether daily feeding pregnant and nursing mice 0.2 mg/kg epigallocatechin (EGC), previously recognized as angiogenesis inhibitor, may lead to abnormalities in morphology of spleen and in some parameters of immune function of their adult, 6-week old progeny. Morphometry of EGC offspring spleens revealed lower number of lymphatic nodules and their larger diameter than those found in the control offspring. Cellularity of spleens was lower in EGC offspring than in the controls. Cytometric analysis showed that this decline concerns lymphocytes with CD335 (p<0.001), CD19 (p<0.01) and CD4 (p<0.05) markers. No differences were observed in the humoral response to the immunization with SRBC, and in the proliferative response of splenocytes to mitogens PHA, ConA and LPS.
In vitro fertilizing potential of urethral and epididymal spermatozoa collected from domestic cats (Felis catus)
Authors: Prochowska S. , Niżański W. 
Published: May 2017

Abstract
The aim of this study was to provide a comparative analysis of in vitro fertilizing potential of frozen-thawed urethral and epididymal feline spermatozoa. Both types of semen were collected from 7 cats and cryopreserved in liquid nitrogen. To perform in vitro fertilization, both urethral and epididymal samples from the same individual were thawed and spermatozoa were co-incubated with in vitro matured cat oocytes. Obtained embryos were cultured in vitro for 7 days in a commercial medium. Cleavage rate, morula rate and blastocyst rate were calculated. Experiment was run in 10 replicates. The examined parameters showed no significant differences between urethral and epididymal spermatozoa (p>0.05). Cleavage rate and embryo’s development were highly variable between replicates, even for the different sperm samples collected from one individual. There was no significant correlation between fertilizing capacity of two types of spermatozoa collected from the same male. In this study we confirmed that cryopreserved urethral spermatozoa have equally good fertilizing potential as epididymal ones, and both can be successfully used for in vitro fertilization in cats with the use of commercial medium.
Molecular analysis of Trichomonas gallinae in racing pigeons from Upper Silesia, Poland
Authors: Bobrek K. , Urbanowicz J. , Chorbiński P. , Gaweł A. 
Published: May 2017

Abstract
The aim of the study was the molecular analysis of ITS1/5.8S rRNA/ITS2 region of Trichomonas gallinae isolates from racing pigeon lofts in Upper Silesia, Poland. The analysed region is very useful for the taxonomy of the Trichomonadidae family and indicates the possible existence of different genotypes or species within the T. gallinae. A comparison of the complete ITS1-5.8S-ITS2 region of obtained sequences revealed two different sequences. Twenty-three of the isolates (62%) showed the first sequence (KU954106) while fourteen isolates (38%) showed the second sequence type (KU954107), which were homologous with sequences from Genbank. The phylogenetic analysis showed that the two T. gallinae genotypes which occurred in the pigeons from Upper Silesia are widespread among European countries.
A systemic review of existing serological possibilities to diagnose canine osteoarthritis with a particular focus on extracellular matrix proteoglycans and protein
Authors: Shahid M. , Manchi G. , Slunsky P. , Naseer O. , Fatima A. , Leo B. , Raila J. 
Published: May 2017

AbstractExtra-cellular matrix (ECM) components are important and their stabilization is significant in maintaining normal healthy joint environment. In osteoarthritis (OA), ECM components are altered and indicate disease progression. The joint ECM is composed of proteoglycans (aggrecan, perlecan, inter α-trypsin inhibitor), glycoproteins (fibronectin, lubricin, COMP) and collagen types (most abundantly collagen type II) which represent structural and functional transformation during disease advancement. ECM investigation revealed significant biomarkers of OA that could be used as a diagnostic and therapeutic tool in different canine orthopedic diseases. This review deliberates our current findings of how the components of ECM change at the molecular level during disease progression in canine OA.
Conductive mechanism of carbon black/polyimide composite films
Authors: Zhang Qianqian , Xu Yong , Yang Yu , Li Linshuang , Song Chaoran , Su Xu 
Published: May 2017

Abstract
During the fabrication of black polyimide composite films, it is common to introduce carbon black (CB) into this composite system. The introduction of CB significantly decreases the resistivity of the films and consequently has a great effect on the inherent insulation property of polyimide. Here, the exploration of the conductive mechanism of CB/polyimide composite films is aimed to explain the change on resistivity fundamentally. In this study, two kinds of representative CBs were chosen to prepare CB/polyimide composite films. The rudiment of the conductive mechanism was built up based on the resistivity curves, and scanning electron microscopy (SEM), tensile, thermal gravimetric analysis, Fourier transform infrared (FT-IR) spectroscopy, UV, Raman and X-ray diffraction (XRD) were conducted to confirm it. The experimental results further verified the mechanism and gave us a chance to propose an integrated conductive mechanism including three sections (tunneling effect mechanism, conductive network mechanism and doping mechanism) for CB/polyimide composite films. As the conductive mechanism has been understood, it paves the way for optimization of the fabrication of conductive black polyimide films and insulating black polyimide films, even other colorful polyimide composite films.
Modellierung von liberalisierten Strommärkten – Herausforderungen und Lösungen
Authors: Grimm Veronika , Ambrosius Mirjam , Rückel Bastian , Sölch Christian , Zöttl Gregor 
Published: May 2017

ZusammenfassungDie Autoren geben einen Überblick über die Literatur zu Investitionsanreizen in Erzeugungs- und Netzkapazität auf liberalisierten Strommärkten und illustrieren die Anwendungsfelder der Strommarktmodellierung mithilfe ausgewählter Ergebnisse aktueller Studien. Zunächst stellen sie die Ideen des „Peak-load pricing“ und der vereinfachten Stromflussmodellierung vor, auf denen Modelle zur Bestimmung eines optimalen Stromversorgungssystems aus Zeiten regulierter staatlicher Gebietsmonopole aufbauen. Seit der Liberalisierung entscheiden jedoch privatwirtschaftliche Akteure über Erzeugungsausbau und Produktion; Betrieb und Ausbau der Netze sind weiterhin reguliert. In der Literatur finden sich seitdem zunehmend Analysen der Investitionsanreize privater Unternehmen, teilweise mit Blick auf die Interdependenz deregulierter und regulierter Bereiche der Stromwirtschaft. Interessant ist unter anderem der Einfluss von Marktmacht auf die Anreize zu Investitionen in die Erzeugungskapazität. Auf dem liberalisierten Strommarkt kann jedoch auch ohne Marktmacht Ineffizienz entstehen, weil private Firmen ihre Standortentscheidungen bezüglich der Erzeugungskapazität nur auf Basis der für sie sichtbaren Preissignale treffen. Weil Netzengpässe im Stromhandel nicht explizit bepreist werden, fehlt es oft an den Preissignalen, die zu einer optimalen Standortwahl führen würden. Die Autoren präsentieren aktuelle Modellierungsansätze, mit denen sich das Zusammenspiel der Erzeugungsinvestitionen privater Unternehmen mit dem Netzausbau durch regulierte Betreiber analysieren und quantifizieren lässt. Dabei werden verschiedene Strommarktdesigns betrachtet, vom Nodalpreissystem mit knotenscharfen Preisen bis hin zum Börsenhandel mit einheitlichem Strompreis gefolgt von Engpassmanagement durch den Netzbetreiber. Die Ergebnisse aktueller quantitativer Studien illustrieren, welche Einsichten sich dank der vorgestellten Ansätze gewinnen lassen; die Autoren zeigen aber auch Grenzen der integrierten quantitativen Marktmodellierung.
Treatment-related cardiovascular toxicity in long-term survivors of testicular cancer
Authors: Gugic Jasenka , Zaletel Lorna Zadravec , Oblak Irena 
Published: May 2017

Abstract

Backgrounds
Testicular cancer is the most common malignancy in young men. Considering increasing incidence, exceptionally high cure rate, as well as long life expectancy, assessment of long term toxicity in testicular cancer survivors is of great importance. In the last decades a major effort has been made in order to reduce toxicity of treatment, while maintaining its high effectiveness.

Conclusions
Actual knowledge on treatment toxicity is based on outdated treatment modalities. Hopefully, modern treatment modalities could reduce toxicity, but, there is no firm confirmation for that at the moment, as data dealing with late sequelae of modern treatment of testicular cancer are not available yet due to the short period of observation. The life-threatening cardiovascular toxicity in testicular cancer survivors is major complication of platinum-based chemotherapy, mediastinal radiotherapy and even subdiaphragmatic radiotherapy.
The influence of the distal resection margin length on local recurrence and long- term survival in patients with rectal cancer after chemoradiotherapy and sphincter- preserving rectal resection
Authors: Grosek Jan , Velenik Vaneja , Edhemovic Ibrahim , Omejc Mirko 
Published: May 2017

Abstract

Background
Low recurrence rates and long term survival are the main therapeutic goals of rectal cancer surgery. Complete, margin- negative resection confers the greatest chance for a cure. The aim of our study was to determine whether the length of the distal resection margin was associated with local recurrence rate and long- term survival.

Patients and methods
One hundred and nine patients, who underwent sphincter-preserving resection for locally advanced rectal cancer after preoperative chemoradiotherapy between 2006 and 2010 in two tertiary referral centres were included in the study. Distal resection margin lengths were measured on formalin-fixed, pinned specimens. Characteristics of patients with distal resection margin < 8 mm (Group I, n = 27), 8–20 mm (Group II, n = 31) and > 20 mm (Group III, n = 51) were retrospectively analysed and compared. Median (range) follow-up time in Group I was 89 (51–111), in Group II 83 (57–111) and in Group III 80 (45–116) months (p = 0.326), respectively.

Results
Univariate survival analysis showed that distal resection margin length was not statistically significantly associated with overall survival or local recurrence rate (p > 0.05). In a multiple Cox regression analysis, after adjusting for pathologic T and N stage (yT, yN), distal resection margin length was still not statistically significantly associated with overall survival.

Conclusions
Our study shows that close distal resection margins can be accepted as oncologically safe for sphincter-preserving rectal resections after preoperative chemoradiotherapy.
Radical Left in Albania and Kosovo: Differences and Similarities
Authors: Këlliçi Klejd , Danaj Emira 
Published: May 2017

AbstractThe main research question for this paper is: Are there radical left wing movements in Albania and Kosovo and what are their main traits? Through answering this question, we will explore the development (or lack thereof) of radical left wing movements. With radical left we intend movements that reject the underlying socio-economic structure of contemporary capitalism and its values and practices without opposing democracy. Through a thorough desk research and several interviews with experts and activists both in Albania and Kosovo, we look at the two case Political Opportunity Structures to study the emergence, the strategies, success or failures of the radical left. In Albania the radical left has been in decline since 1992, with only a recent revival from 2009 on. In Kosovo, the Lëvizja Vetëvendojse! (Self-Determination Movement), a civil movement transformed in a party, has succeeded in imposing its left agenda. Both cases employ a new rhetoric unrelated to the past communist regimes thus changing the perspective of political debate in both countries.
Resolving Marital Conflicts
Authors: Islami Hatixhe 
Published: May 2017

Abstract
Couple relations are characterized as relations of an intimate nature dominated by constant interaction or strong interdependence and mutual influence of intense feelings between spouses. In marriages where there is conflict, there are typical examples of interaction, which result in high proportion of negative communicative acts that affect the quality of marital relationships such as: loss of confidence, the emergence of frustration, feelings of anxiety, discomfort, leading to escalation of marital conflicts. Communication as a variable has a large impact on the resolution of marital conflicts. The obtained results of our research indicate that the choice of different strategies of behavior in conflict situations among our respondents primarily depend on: the degree of persistence in the pursuit of its own interests and level of cooperation in addressing the interests of others.
In accordance with the model of behavior in conflict situations, spouses also chose the styles for resolving them. Spouses who perceive (consider) that they communicate openly unlike spouses who do not practice open communication, use the competition as a model of behavior in conflict situations and support rivalry as a style for conflict resolution. The choice of rivalry style as a style for resolving marital conflicts, among our respondents appears as a reflection of expressed wish for having an open fight for the realization of their interests, especially when it comes to the limitation of their rights by their spouses, failure to fulfill the emotional needs (lack of love, care, attention, understanding).
But, the duration of the marital relationship as a dimension does not affect the use of certain styles for resolving marital conflicts among our respondents.
Ukraine’s Geopolitical Position: Between East and West
Authors: Rexhepi Enis H. 
Published: May 2017

Abstract
The paper analyses Ukraine’s geopolitical position and argues that Ukraine is slowly gravitating towards West. The paper gives a small hint of approximation process of Ukraine within EU and NATO, and argues how this approximation process is opposed by Russia, who wants Ukraine back to its influence. Occupation off Crimea by Russia violated international order, opening way to unstructured international ties out traditional UN bodies. The Ukraine’s destiny is unclear, Dnieper River may divide country in two, and the West faces biggest security and political threat after WWII.