bluuebunny/crossref_metadata_2025_split huggingface dataset:
A Berezin-type map and a class of weighted composition operators
Authors: Das Namita 
Published: April 2017

Abstract
In this paper we consider the map L defined on the Bergman space

$L_a^2({{\rm\mathbb{C}}_{\rm{ + }}})$

of the right half plane ℂ+ by

$(Lf)(w) = \pi M'(w)\int\limits_{{{\rm\mathbb{C}}_{\rm{ + }}}} {\left( {{f \over {M'}}} \right)} (s){\left| {{b_w}(s)} \right|^2}d\tilde A(s)$

where

${b_{\bar w}}(s) = {1 \over {\sqrt \pi }}{{1 + w} \over {1 + w}}{{2{\mathop{Re}\nolimits} w} \over {{{(s + w)}^2}}}$

, s ∈ ℂ+ and

$Ms = {{1 - s} \over {1 + s}}$

. We show that L commutes with the weighted composition operators Wa, a ∈ 𝔻 defined on

$L_a^2({{\rm\mathbb{C}}_{\rm{ + }}})$

, as

${W_a}f = (f \circ {t_a}){{M'} \over {M' \circ {t_a}}}$

,

$f \in L_a^2(\mathbb{C_ + })$

. Here

$${t_a}(s) = {{ - ids + (1 - c)} \over {(1 + c)s + id}}

, if a = c + id ∈ 𝔻 c, d ∈ ℝ. For a ∈ 𝔻, define

${V_a}:L_a^2({{\mathbb{C}}_{\rm{ + }}}) \to L_a^2({{\mathbb{C}}_{\rm{ + }}})$

by (Vag)(s) = (g∘ta)(s)la(s) where

$la(s) = {{1 - {{\left| a \right|}^2}} \over {{{((1 + c)s + id)}^2}}}$

.We look at the action of the class of unitary operators Va, a ∈ 𝔻 on the linear operator L. We establish that Lˆ = L where

$\mathord{\buildrel{\lower3pt\hbox{$\scriptscriptstyle\frown$}}\over L} = \int\limits_{\mathbb{D}} {{V_a}L{V_a}dA(a)}$

and dA is the area measure on 𝔻. In fact the map L satisfies the averaging condition

$$\tilde L({w_1}) = \int\limits_{\mathbb{D}} {\tilde L({t_{\bar a}}({w_1}))dA(a),{\rm{for all }}{w_1} \in {{\rm{C}}_{\rm{ + }}}}$$

where

$\tilde L({w_1}) = \left\langle {L{b_{{{\bar w}_1}}},{b_{{{\bar w}_1}}}} \right\rangle$.
Prediction of Experimental Measurement Data for High Density Polyethylene and Polypropylene Solubility in Organic Solvents
Authors: Hadi Arkan J. , Hadi Ghassan J. , Yusoh Kamal Bin , Najmuldeen Ghazi Faisal , Hasany Syed F. 
Published: April 2017

Abstract
High density polyethylene (HDPE) and polypropylene (PP) solubility in several pure and blend non-polar organic solvents was measured at 365–430 K temperature at atmospheric pressure, with polymer concentration of 0.5–25 g in 100 ml of solvent. The activity coefficients were estimated depending on the experimental solubility results for all the polymer-solvent systems. A non-ideal equation combined with activity coefficient was developed based on the crystallinity. A new correlation equation was attained, which is based on the melting temperature and heat of fusion using SSPS software. These two equations were used to predict the solid-liquid experimental data for the binary system polymer-solvent. The distinction between the experimental and model data was assessed by using mean absolute deviation percentage (MAD %). The non-ideal equation based on crystallinity and the new correlations showed low MAD %, displaying a close match with the experimental data.
Hermitian metrics, (n-1,n-1) forms and Monge–Ampère equations
Authors: Tosatti Valentino , Weinkove Ben 
Published: April 2017

Abstract
We show existence of unique smooth solutions to the Monge–Ampère equation for

(

n
-
1

)

(n-1)

-plurisubharmonic functions on Hermitian manifolds, generalizing previous work of the authors. As a consequence we obtain Calabi–Yau theorems for Gauduchon and strongly Gauduchon metrics on a class of non-Kähler manifolds: those satisfying the Jost–Yau condition known as Astheno–Kähler. Gauduchon conjectured in 1984 that a Calabi–Yau theorem for Gauduchon metrics holds on all compact complex manifolds. We discuss another Monge–Ampère equation, recently introduced by Popovici, and show that the full Gauduchon conjecture can be reduced to a second-order estimate of Hou–Ma–Wu type.
Tax Policy Assessment in Slovenia – Case of Interest Tax Shield
Authors: Jovanovic Tatjana , Klun Maja 
Published: April 2017

AbstractThe tax policy assessment is an indispensable strategy within any modern country’s system of governance. There are several types of “impact assessments”, with RIA as one of the most commonly used. This tool is used to measure and analyse the benefits, costs and effects of a new or existing legal regime, which can be carried out by collecting and analysing empirical data in the context of a broader decision-making framework. The main objective of the paper is to analyse which stage the Slovenian regulatory impact assessment is in, and whether this stage is sophisticated enough to provide for the essential verification of tax policy and specific instruments, focusing mainly on the case of interest tax shield issues. Methodologically, the paper is based on a systematic literature review, a survey for public consultations and statistical tools for calculating the differences in internal indebtedness in different observed periods. The results show that the Slovenian RIA is not sophisticated enough to evaluate complex tax instruments and policy. Nevertheless, tax policy decision-makers should reconsider the implementation of a thin capitalization rule (but also future tax policy instruments) focusing also on other, non-tax revenue, factors.
Some of the Theoretical Basis of Local Self-Government in the Czech Republic
Authors: Pospíšil Petr , Lebiedzik Marian 
Published: April 2017

AbstractIn the valid legislation of the Czech Republic, we do not find a clear and completely unambiguous definition of the concept of “self-government”. Nonetheless, it is an institute traditionally used and with content defined in a particular way by the theory of administrative law or administrative science in the context of the division of public administration into state administration and self-government. Self-government usually refers to public administration (i.e. administration of public affairs) carried out by public law bodies other than the state. These public law bodies are most often public corporations, which perform specific tasks within territorial self-government, professional self-government and interest group self-government. The aim of the paper is to provide an interpretation of the theoretical and legislative definition of the concept of self-government and specifically to focus on territorial self-government. In processing the paper and fulfilling the set goal, the authors will primarily use scientific methods of analysis, synthesis, description, explanation and comparison. Based on the presentation and analysis of theoretical opinions on the issue, the applicable legislation of territorial self-government and insights from public law-related practice, the authors conclude that it is appropriate to consider a more detailed (yet open) definition of self-governing tasks of municipalities and regions in the future.
On Weil homomorphism in locally free sheaves over structured spaces
Authors: Falkiewicz Ewa , Sasin Wiesław 
Published: April 2017

Abstract
Inspired by the work of Heller and Sasin [1], we construct in this paper Weil homomorphism in a locally free sheaf W of ϕ-fields [2] over a structured space. We introduce the notion of G-consistent, linear connection on this sheaf, what allows us to clearly define Chern, Pontrjagin and Euler characteristic classes. We also show proper equalities between those classes.
Mussel Farming and Its Potential in the Baltic Sea
Authors: Ozoliņa Zaiga 
Published: April 2017

Abstract
The paper covers research findings on mussel farming and the analysis of current situation in mussel farming in the Baltic Sea. The mussel farming has a development potential in the Baltic Sea region. Some developers have chosen progressive activities to achieve the aim. For example, in Sweden the development of mussel farming is suggested as one of the instruments for reducing eutrophication. Several countries in the Baltic Sea region are in the beginning phase of the mariculture development. The following research methods were used in the research: studies of scientific publications, case studies and document studies on some important factors impeding the development of mussel farming in the Baltic Sea.
Quantitative observation of the foraging tunnels in Sitka spruce and Japanese cypress caused by the drywood termite Incisitermes minor (Hagen) by 2D and 3D X-ray computer tomography (CT)
Authors: Choi BaekYong , Himmi S. Khoirul , Yoshimura Tsuyoshi 
Published: April 2017

Abstract
The cryptic lifestyle of drywood termites makes it difficult to study their foraging behaviour and to detect infestations in hidden regions. In the present research, computer tomography (CT) scanning images were collected over a 1-year observation period of drywood termite Incisitermes minor (Hagen) in order to understand its foraging behaviour and, perhaps, to be able to detect the infestation as early as possible. Sitka spruce and Japanese cypress woods were the test objects. As CT scanning results show, foragers caused distinguished tunnelling patterns based on the physical properties of wood during gallery construction. The foragers primarily excavate along the earlywood in radial direction towards the outer surface of the wood to establish the primary and satellite chambers, followed by mainly superficial (0.3–3.0 cm under the surface) longitudinal expansion with occasional lateral deviations. The development of tunnelling is affected by the physical constraints of knots with their high density, high extractive and lignin contents, reaction wood (compression wood) and wood damage caused by wind.
PHC, Id-Iq and p-q Control Strategies for Mitigation of Current Harmonics in Three-Phase Three-Wire Shunt Active Filter with PI Controller
Authors: Mikkili Suresh , Padamati Adinarayana 
Published: April 2017

AbstractIn this research paper, the shunt active filter (SHAF) is used to improve the power quality of electrical network by mitigating the harmonics with the help of different control strategies (p-q control strategy, Id-Iqcontrol strategy, PHC control strategy) for three phase three wire system. It is quite difficult to optimize the performance of power system networks using conventional methods, because of complex nature of the systems that are highly non-linear and non-stationary. Three phase reference current waveforms generated by the proposed schemes are tracked by three phase voltage source converter in a hysteresis band control scheme. The performance of proposed control strategies has been evaluated in terms of harmonic mitigation and DC link voltage regulation under various source voltage conditions. The proposed SHAF with different control strategies is able to eliminate uncertainty in the system and SHAF gains outstanding compensation abilities. The detailed simulation results using MATLAB/Simulink software are presented to support the feasibility of the proposed control strategy.
Ergonomic assessment of the da Vinci console in robot-assisted surgery
Authors: van’t Hullenaar Cas D.P. , Hermans Ben , Broeders Ivo A.M.J. 
Published: April 2017

AbstractBackground:Robot-assisted surgery is considered to improve ergonomics over standard endoscopic surgery. Nevertheless, previous research demonstrated ergonomic deficits in the current console set-up.Aim:This study was designed to objectively assess body posture in the da Vinci console during robot-assisted endoscopic surgery.Methods:Multiple sagittal photographs from six physicians were taken during robot-assisted procedures. Trunk, neck, shoulder, elbow, hip, and knee angles were calculated and compared to ergonomic preferable joint angles. A 2D geometric model was developed using individual anthropometrics. Optimal seat height, armrest height, and viewer height were calculated. These results were compared to the findings of the sagittal photographs.Results:Mean joint angles show potentially harmful neck angles for all participants. Trunk angles vary between surgeons, from inadequate to correct. In short and very tall individuals, optimal armrest height is outside the adjustment range of the console.Conclusion:The da Vinci Surgical System console seating position results in a nonergonomic neck and trunk angle. The developed geometric model revealed that armrest height has a limited adjustment range. Adjustments to the console and optimization of preoperative settings are goals to further improve ergonomics in robot-assisted surgery.
Early detection of liver damage in Mexican patients with chronic liver disease
Authors: Torres-Valadez Rafael , Roman Sonia , Jose-Abrego Alexis , Sepulveda-Villegas Maricruz , Ojeda-Granados Claudia , Rivera-Iñiguez Ingrid , Panduro Arturo 
Published: April 2017

Abstract

Background and Objective
Liver cirrhosis is usually detected at the later stages of disease. This study is aimed to detect liver damage in patients with chronic liver disease using transitional elastography (TE) and to assess the biochemical parameters associated with liver damage.

Methods
In 578 patients, chronic liver disease based on etiology was diagnosed by clinical and laboratory tests. Liver damage was evaluated with TE (FibroScan®), while its association with biochemical parameters was performed using the logistic regression tests.

Results
Overall, the main etiologies of liver damage were hepatitis C virus (HCV) (37%), alcoholic liver disease (ALD) (33%) and non-alcoholic steatohepatitis (NASH) (26%). Patients were 40 to 50 years of age. ALD and hepatitis B prevailed in men, whereas HCV and NASH in women. The stages of fibrosis were F0 (n = 121, 21%), F1 (n = 122, 21%), F2 (n = 58, 10%), F3 (n = 46, 8%) and F4 (n = 87, 15%). In patients with liver cirrhosis, ALD (n = 96/217, 45%), HCV (n = 94/217, 43%) and NASH (n = 21/217, 10%) were the leading etiologies. Platelets count (OR=3.31, 95%CI 1.61-6.78), glucose (OR=3.07, 95%CI 1.50-6.26), gamma-glutamyl-transferase (OR=3.60, 95%CI 1.79-7.25), albumin (OR=3.89, 95%CI 1.61-9.36), and total bilirubin (OR=3.93, 95%CI 1.41-10.91) were associated to advanced stages of fibrosis (F3-F4) regardless of etiology. The concordance and positive predictive values of these parameters were higher as compared to other scores.

Conclusion
Asymptomatic liver disease due to HCV, ALD and NASH prevailed in young adults. Advanced liver damage assessed by TE was associated with five biochemical parameters. In conjunction, both methodologies may be useful for the early detection of fibrosis and cirrhosis in Latin America.
Protracted inhibition of vascular endothelial growth factor signaling improves survival in metastatic colorectal cancer: A systematic review
Authors: Montagnani Francesco , Di Leonardo Greta , Pino Mariasimona , Perboni Simona , Ribecco Angela , Fioretto Luisa 
Published: April 2017

Abstract
Clinical data suggest that beyond-progression, the blockade of angiogenesis is associated with improved survivals in colorectal cancer. We conducted a systematic review to investigate the therapeutic effects of antiangiogenic drugs administered as later lines of treatment in patients already progressed to a previous anti-VEGF based treatment. An extensive literature search was conducted. Hazard ratios (HR) for progression (PFS) and death (OS) were extracted. An inverse-variance meta-analysis model was implemented. 6 randomized controlled trials were retrieved, including 3407 patients, treated with different antiangiogenic drugs. All of them had progressed during or after a previous line of treatment with bevacizumab. Overall, both PFS (HR=0.63, P <0.001) and OS (HR=0.81, P < 0.001) were significantly increased with the use of antiangiogenic drug. No heterogeneity was observed despite different drugs. Protracted inhibition of the VEGF pathway is associated with a significant improvement of both PFS and OS, independently from the antiangiogenic agent used.
The concept of sustainable tourism development in rural areas – A case study of Zbąszyń commune
Authors: Lisiak Marta , Borowiak Klaudia , Muńko Ewelina 
Published: April 2017

Abstract
Tourism in rural areas has been defined as all tourist activities conducted in rural areas. The development of tourism in rural areas is dependent on external factors (e.g. landscape attractiveness), as well as internal factors (e.g. involvement of local authorities and society). Hence, it is important to increase the tourism potential for further increase of local tourism, and in turn to intensify the social-economic development according to a sustainable policy and multifunctional rural development. The main aim of the present study was to indicate possibilities to improve tourism management of the Zbąszyń urban-rural commune. For this purpose the following detailed aims were set: to evaluate local society satisfaction with tourism development in Zbąszyń commune, to evaluate the natural-landscape state of the analyzed area, to designate a new tourist trail or to revise the existing trails, and to propose modernization of existing tourism infrastructure. The obtained results revealed that in the opinion of local society there is still not sufficient tourism development despite some natural-landscape values. Hence, activities connected with tourism enrichment should be mainly connected with designation of two new cycling trails and supplementation of tourist information signs and tables. All proposed activities leading to an increase of tourism potential should bear in mind social aspects as well as natural values and would have a positive effect on economic income of the area.
Assessment of the relation between atmospheric precipitation and rainwater runoff for various urban surfaces
Authors: Romaniak Alicja 
Published: April 2017

Abstract The relation between the diurnal sum of atmospheric precipitation and the diurnal volume of rainwater runoff from four experimental hardened surfaces was the subject of a pilot study conducted within the area of the Departmental Agro- and Hydrometeorology Observatory in Wrocław. The selection and the structure of the experimental surfaces were preceded with an inventory-taking of the coverage of hardened surfaces within a Wrocław housing estate with high-rise multifamily buildings. That estate was the second location, next to the area of the Observatory, at which the study presented here was conducted. The surfaces included in the experiment were roof surfaces P1 and P2 covered with heat-sealable roll roofing, surface APB made of gravel-filled openwork concrete plates, and tarmac surface AS. The pilot study was conducted during the period from April to November, 2014. During that period, depending on the type of experimental surface, from 81 to 87 days with atmospheric precipitation were analysed. The mean values of the rainwater runoff coefficients for the eightmonth period were 0.77, 0.77, 0.33 and 0.67 for surfaces P1, P2, APB and AS, respectively. The range of variability of mean values of the coefficients of rainwater runoff from the experimental surfaces in a month is presented by the following relation: APB > P1 > AS > P2. The study did not reveal any direct effect of the number of rainfall days in a month on the value of the coefficient of determination describing the correlation between the diurnal sums of precipitation and the diurnal volumes of rainwater runoff.
Assessing the suitability of extreme learning machines (ELM) for groundwater level prediction
Authors: Yadav Basant , Ch Sudheer , Mathur Shashi , Adamowski Jan 
Published: April 2017

Abstract
Fluctuation of groundwater levels around the world is an important theme in hydrological research. Rising water demand, faulty irrigation practices, mismanagement of soil and uncontrolled exploitation of aquifers are some of the reasons why groundwater levels are fluctuating. In order to effectively manage groundwater resources, it is important to have accurate readings and forecasts of groundwater levels. Due to the uncertain and complex nature of groundwater systems, the development of soft computing techniques (data-driven models) in the field of hydrology has significant potential. This study employs two soft computing techniques, namely, extreme learning machine (ELM) and support vector machine (SVM) to forecast groundwater levels at two observation wells located in Canada. A monthly data set of eight years from 2006 to 2014 consisting of both hydrological and meteorological parameters (rainfall, temperature, evapotranspiration and groundwater level) was used for the comparative study of the models. These variables were used in various combinations for univariate and multivariate analysis of the models. The study demonstrates that the proposed ELM model has better forecasting ability compared to the SVM model for monthly groundwater level forecasting.
Investigating the Relationship between Vocabulary Knowledge and Academic Success of Arabic Undergraduate Learners in Swansea University
Authors: Alsager Reem , Milton James 
Published: April 2017

AbstractThe number of Arabic learners studying abroad has increased significantly over the last decade, and continues to increase. To test such students’ proficiency with English in an academic setting, most universities use standardised exams, such as the Test of English as a Foreign Language (TOEFL) or the International English Language Test System (IELTS). Although these tools are considered valid entry tests (Taylor and Falvey, 2007) they don’t appear to be useful predictors of academic success (e.g. Cotton and Conrow, 1998). We have therefore tried to find alternative measures to help refine our ability to predict academic performance. These include vocabulary knowledge using the XK_Lex test (Milton & Al- Masrai, 2009); intelligence test (Wechsler Abbreviated Scale of Intelligence, WASI) and a foreign language aptitude test (Modern Language Aptitude Test, MLAT; Carroll & Sapon, 1959).36 Arabic undergraduate students in Swansea University participated in this study. The results of the measures were correlated with participants’ Grade Point Average (GPA) as a measure of academic achievement. The findings suggest that a vocabulary knowledge threshold of 5000 and above is necessary for L2 learners to undertake international education; below this volume of vocabulary, they risk failure or academic hardship during their studies. No correlation was found between intelligence or aptitude test scores and learners’ academic achievement, but a significant relationship was noted between intelligence and vocabulary knowledge, confirming the trend that learners with high intelligence scores are more likely to possess an extensive vocabulary than learners with low intelligence scores.