bluuebunny/crossref_metadata_2025_split huggingface dataset:
Transformation of Long Waves in a Canal of Variable Section
Authors: Szmidt Kazimierz , Hedzielski Benedykt 
Published: September 2016

Abstract
The paper deals with long water waves propagating in a straight canal of constant depth and variable section. In the formulation of this problem, a simplified, one-dimensional model is considered that is based on the assumption of a “columnar” fluid motion. To this end, a system of material coordinates is employed as independent variables in the description of this phenomenon. The main attention is focused on transient solutions corresponding to a fluid motion starting from rest.With respect to the initial value problem considered,we confine our attention to a finite domain fluid motion induced by a piston-type generator placed at the beginning of the canal. For a finite elapse of time, measured from the starting point, the solution in the finite fluid area mimics a solution within an infinite domain, inherent for wave propagation problems. The main goal of our investigations is to describe the evolution of the free surface (the wave height) at the smallest section of the canal. Numerical examples are provided to illustrate the model formulation developed in this paper. The accuracy of this approximate description is assessed by comparing its results with data obtained in hydraulic experiments performed in a laboratory flume.
The Self-assembled Deposition on the Surface of Mono-crystalline Silicon Induced by High-Current Pulsed Electron Beam
Authors: Conglin Zhang , Qingfeng Guan , Jie Chen , Pengcheng Yan , Peng Lv 
Published: September 2016

AbstractHigh-current pulsed electron beam (HCPEB) technique was applied to irradiate the surface of mono-crystalline silicon wafers. Surface microstructures of the irradiated surface were investigated in detail by atomic force microscope (AFM), scanning electron microscope (SEM) and transmission electron microscope (TEM). The experimental results show that HCPEB irradiation with energy density 4 J/cm2 caused evaporation of the irradiated surface. Subsequently, the evaporation Si-droplets was deposited to form Si-nanoparticles on the surface. Meanwhile, the structures of intensive plastic deformation were also introduced within the irradiated surface layer. The dislocation configurations with rectangular and approximate hexagonal network were formed on the surface of Si wafer after 5-pulsed irradiation. The periodic self-deposited structures appear to be related to the configuration of regular dislocations arrays, which were favorable locations for the deposited Si-nanoparticles.
Influence of Ti on the Hot Ductility of High-manganese Austenitic Steels
Authors: Liu Hongbo , Liu Jianhua , Wu Bowei , Su Xiaofeng , Li Shiqi , Ding Hao 
Published: September 2016

AbstractThe influence of Ti addition (~0.10 wt%) on hot ductility of as-cast high-manganese austenitic steels has been examined over the temperature range 650–1,250 °C under a constant strain rate of 10−3 s−1 using Gleeble3500 thermal simulation testing machine. The fracture surfaces and particles precipitated at different tensile temperatures were characterized by means of scanning electron microscope and X-ray energy dispersive spectrometry (SEM–EDS). Hot ductility as a function of reduction curves shows that adding 0.10 wt% Ti made the ductility worse in the almost entire range of testing temperatures. The phases’ equilibrium diagrams of precipitates in Ti-bearing high-Mn austenitic steel were calculated by the Thermo-Calc software. The calculation result shows that 0.1 wt% Ti addition would cause Ti(C,N) precipitated at 1,499 °C, which is higher than the liquidus temperature of high-Mn austenitic steel. It indicated that Ti(C,N) particles start forming in the liquid high-Mn austenitic steel. The SEM–EDS results show that Ti(C,N) and TiC particles could be found along the austenite grain boundaries or at triple junction, and they would accelerate the extension of the cracks along the grain boundaries.
Power Factor Improvement for Pumping Stations using Capacitor Banks
Authors: Mohamad M. M. , Abd El-gawad Amal F. , Ramadan H. S. 
Published: September 2016

Abstract
One of the fundamental problems affects the performance of pumping stations is its relative high operational cost. As three-phase induction motors are the main prime mover of pumping stations and considered the most widely used electrical motors due to their reliability, ease of maintenance. However, its major problem is the low power factor which results in high electric energy consumption. Energy will be saved when power factor is improved. The main objective of this paper is studying the power factor improvement in El sadaa Pumping Station because of its low operating efficiency which goes from 20 % to 25 %and calculating penalty, ponus and savings in each cases. The correction is achieved by the addition of capacitor banks in parallel with the connected motor circuits and can be applied to the starter, applied at the switchboard or the distribution panel. A model of this station is created using MatlabTM Simulink. Then the determination of induction motor parameters is performed. The station model is discussed. From the simulation results, the power factor enhancement of the pumping station is highlighted.
The structure group of an L-algebra is torsion-free
Authors: Rump Wolfgang 
Published: September 2016

Abstract

L-algebras arise in algebraic logic, in the
theory of one-sided lattice-ordered groups, and in connection with
set-theoretic solutions of the quantum Yang–Baxter equation. They apply in
several ways to Garside groups. For example, the set of
primitive elements, the set of simple elements, and the negative cone of a
Garside group are all L-algebras. Picantin’s iterated crossed product
decomposition of Garside groups can be reformulated and extended in terms of
L-algebras. It is proved that the structure group of an
L-algebra, introduced in connection with the “logic” of

ℓ

${\ell}$

-groups, is
torsion-free. This applies to the left group of fractions of not
necessarily noetherian, Garside-like monoids which need not embed into their
ambient group.
An a posteriori mollification method for the heat equation backward in time
Authors: Duc Nguyen Van 
Published: September 2016

Abstract
The heat equation backward in time

u
t

=

u

x
⁢
x

,

x
∈
ℝ

,

t
∈

(
0
,
T
)

,

∥

u
⁢

(
⋅
,
T
)

-

φ
⁢

(
⋅
)

∥

L
p

⁢

(
ℝ
)

⩽
ε

,

u_{t}=u_{xx},\quad x\in\mathbb{R},\,t\in(0,T\/),\qquad\|u(\,\cdot\,,T\/)-%
\varphi(\,\cdot\,)\|_{L_{p}(\mathbb{R})}\leqslant\varepsilon,

subject to the constraint

∥

u
⁢

(
⋅
,
0
)

∥

L
p

⁢

(
ℝ
)

⩽
E

{\|u(\,\cdot\,,0)\|_{L_{p}(\mathbb{R})}\leqslant E}

, with

T
>
0

{T>0}

,

φ
∈

L
p

⁢

(
ℝ
)

{\varphi\in L_{p}(\mathbb{R})}

,

0
<
ε
<
E

{0<\varepsilon<E}

,

1
<
p
<
∞

{1<p<\infty}

being given, is regularized by the well-posed mollified problem

u
t
ν

=

u

x
⁢
x

ν

,

x
∈
ℝ

,

t
∈

(
0
,
T
)

,

u
ν

⁢

(
x
,
T
)

=

S
ν

⁢

(
φ
)

⁢

(
x
)

,

ν
>
0

,

u_{t}^{\nu}=u_{xx}^{\nu},\quad x\in\mathbb{R},\,t\in(0,T\/),\qquad u^{\nu}(x,T%
\/)=S_{\nu}(\varphi)(x),\quad\nu>0,

where

S
ν

⁢

(
φ
)

⁢

(
x
)

=

1
π

⁢

∫

-
∞

+
∞

sin
⁡

(

ν
⁢
y

)

y

⁢
φ
⁢

(

x
-
y

)

⁢

𝑑
y

.

S_{\nu}(\varphi)(x)=\frac{1}{\pi}\int_{-\infty}^{+\infty}\frac{\sin(\nu y)}{y}%
\varphi(x-y)\,dy.

An a posteriori parameter choice rule for this regularization method is suggested, which yields the error
estimate

∥

u
⁢

(
⋅
,
t
)

-

u
ν

⁢

(
⋅
,
t
)

∥

L
p

⁢

(
ℝ
)

⩽

c
⁢

ε

t
/
T

⁢

E

1
-

t
/
T

for all
⁢
t

∈

[
0
,
T
]

.

\|u(\,\cdot\,,t)-u^{\nu}(\,\cdot\,,t)\|_{L_{p}(\mathbb{R})}\leqslant c%
\varepsilon^{t/T}E^{1-t/T}\quad\text{for all }t\in[0,T].

Furthermore, we establish stability estimates of Hölder type for all derivatives of the solutions with respect to x and t.
Effect of Flux Composition on the Percentage Elongation and Tensile Strength of Welds in Submerged Arc Welding
Authors: Singh Brijpal , Khan Zahid A. , Siddiquee A.N. , Maheswari Sachin , Sharma Satish Kumar 
Published: September 2016

Abstract
This experimental study reveals the effects of CaF2, FeMn and NiO additions to the base fluxes on tensile strength and percentage elongation of the weld metal. The aim of this study is to develop suitable flux for mild steel for high tensile strength, impact strength and ductility. Bead on plate welds were made using submerged arc welding process. Mathematical model for percentage elongation and UTS of mild steel welds were made. The elements transfer to the welds have been correlated with the above mechanical performance characteristics. The effect of oxygen content on weld elongation and UTS also has been deduced. This study shows that CaF2 and NiO are the significant factors for tensile strength while FeMn is not significant for tensile strength. However, for elongation besides CaF2, the interaction of CaF2 and FeMn was also found significant. The effects of basicity index of the flux and carbon equivalent of the welds on tensile strength and percentage elongation of the welds have also been evaluated.
Finite Element Modeling of Material Fatigue and Cracking Problems for Steam Power System HP Devices Exposed to Thermal Shocks
Authors: Pawlicki Jakub , Marek Piotr , Zwoliński Janisław 
Published: September 2016

Abstract
The paper presents a detailed analysis of the material damaging process due to low-cycle fatigue and subsequent crack growth under thermal shocks and high pressure. Finite Element Method (FEM) model of a high pressure (HP) by-pass valve body and a steam turbine rotor shaft (used in a coal power plant) is presented. The main damaging factor in both cases is fatigue due to cycles of rapid temperature changes. The crack initiation, occurring at a relatively low number of load cycles, depends on alternating or alternating-incremental changes in plastic strains. The crack propagation is determined by the classic fracture mechanics, based on finite element models and the most dangerous case of brittle fracture. This example shows the adaptation of the structure to work in the ultimate conditions of high pressure, thermal shocks and cracking.
Reoperations for Intraabdominal Bleeding Following Deceased Donor Liver Transplantation
Authors: Figiel Wojciech , Grąt Michał , Wronka Karolina M. , Patkowski Waldemar , Krasnodębski Maciej , Masior Łukasz , Stypułkowski Jan , Grąt Karolina , Krawczyk Marek 
Published: September 2016

AbstractIntraabdominal hemorrhage remains one of the most frequent surgical complications after liver transplantation.The aim of the study was to evaluate risk factors for intraabdominal bleeding requiring reoperation and to assess the relevance of the reoperations with respect to short- and long-term outcomes following liver transplantation.Material and methods. Data of 603 liver transplantations performed in the Department of General, Transplant and Liver Surgery in the period between January 2011 and September 2014 were analyzed retrospectively. Study end-points comprised: reoperation due to bleeding and death during the first 90 postoperative days and between 90 postoperative day and third post-transplant year.Results. Reoperations for intraabdominal bleeding were performed after 45 out of 603 (7.5%) transplantations. Low pre-transplant hemoglobin was the only independent predictor of reoperation (p=0.002) with the cut-off of 11.3 g/dl. Postoperative 90-day mortality was significantly higher in patients undergoing reoperation as compared to the remaining patients (15.6% vs 5.6%, p=0.008). Post-transplant survival from 90 days to 3 years was non-significantly lower in patients after reoperation for bleeding (83.3%) as compared to the remaining patients (92.2%, p=0.096). Nevertheless, multivariable analyses did not reveal any significant negative impact of reoperations for bleeding on short-term mortality (p=0.589) and 3-year survival (p=0.079).Conclusions. Surgical interventions due to postoperative intraabdominal hemorrhage do not appear to affect short- and long-term outcomes following liver transplantation. Preoperative hemoglobin concentration over 11.3 g/dl is associated with decreased risk of this complication, yet the clinical relevance of this phenomenon is doubtful
Personality Traits and Decision on Breast Reconstruction in Women after Mastectomy
Authors: Miśkiewicz Halina , Antoszewski Bogusław , Iljin Aleksandra 
Published: September 2016

AbstractThe aim of the study was evaluation of the correlation between selected personality traits in women after mastectomy and their decision on breast reconstruction.Material and methods. The study was conducted between 2013‑2015, in the Department of Plastic, Reconstructive and Aesthetic Surgery, Medical University of Lodz, and Department of Oncological and Breast Surgery, CZMP. Comparative analysis comprised 40 patients, in whom mastectomy and breast reconstruction was done, and 40 women after breast amputation, who did not undergo reconstructive surgery. Basing on self-constructed questionnaire, five features of personality were evaluated in these women: pursue of success in life, ability to motivate others, openness to other people, impact of belonging to a social group on sense of security and the importance of opinion of others about the respondent. Apart from the questionnaire, in both groups of women a psychologic tool was used (SUPIN S30 and C30 tests) to determine the intensity of positive and negative emotions.Results. Women who did not choose the reconstructive option were statistically significantly older at mastectomy than women who underwent breast reconstruction. There were statistically significant differences between both groups in response to question on being open to other people and value of other people’s opinion. The differences in responses to question on the impact of belonging to a social group on personal sense of safety were hardly statistically significant. In psychometric studies there were significant differences in responses to SUPIN C30 test for negative emotions and S-30 for positive emotions. The level of negative emotions - feature of group A was in 47.5% in the range of high scores and in 47.5% within low and low-average scores. Among women from group B 57.5% had high scores, while 37.5% low and average scores. There were significant differences in the results of positive emotions evaluation in S-30. Women who did not undergo breast reconstruction usually had high scores, while those who decided on reconstructive surgery usually had low scores and low-high scores.Conclusions. 1. The decision on breast reconstruction after mastectomy is connected with personality features of patients. Introvert women, who base their self-opinion on opinion of others and their sense of security on belonging to a social group, rarely choose to undergo breast reconstruction. 2. Younger patients after mastectomy more frequently choose the breast reconstructive option. 3. A special algorithm of medical and psychological care in patients after mastectomy should be created to improve their further quality of life.
Innovations in the continuing professional development of foreign language teachers: from blended learning to visual-based learning, choices of emotional and instructional designs
Authors: Toci Valentina 
Published: September 2016

Abstract
In this study, starting from the profile of our trainees and from the risks highlighted by some studies in terms of the use of video in education, we will analyse the motivations and choices behind the development of the online training model for Foreign Language teachers. We will show how, in order to cope with the impossibility of continuing with blended training, we were directed to a model more closely linked with visual-based learning. We explain our instructional and emotional design choices to support and direct our teacher trainees to flexible learning and the use of media and Web 2.0 in their classrooms. Finally, we investigate the possible problems in terms of sustainability and technical feasibility, comparing the development of two prototypes of videos made using the techniques of video scribing and whiteboard animation: a video interview and a video animation.
“Avanguardie Educative”: paths of innovation for schools
Authors: Laici Chiara , Orlandini Lorenza 
Published: September 2016

AbstractThis article presents “Avanguardie Educative” (http://avanguardieeducative.indire.it/), a cultural movement founded to gather the most significant experiences of organizational and educational innovation in Italian schools and encourage transformation of the traditional lecture-based school model. With the aim of supporting an innovation process that has emerged from bottom -up reasoning, INDIRE (National Institute for Documentation, Innovation and Educational Research) and 22 founder member schools (advanced schools) have produced a manifesto based on seven pillars that inspired the “Gallery of 12 Ideas” -experiences of innovation re-elaborated by researchers based on experience gained in certain Italian schools, which, some time ago, began to gradually change the organization, school time and space for teaching in ways that would encourage pupils to take an active role in teaching -learning processes. The Avanguardie Educative movement currently includes 416 schools that are trying out the ideas, with support from the advanced schools and INDIRE, aided by a blended coaching process designed to build a professional community of practice.
Digital artefacts to change the teacher’s practices
Authors: Pentucci Maila 
Published: September 2016

AbstractThe change imposed by the diffusion of information and communications technology concerns didactic transposition practices, especially in the context of ‘public subjects’, such as taught history, because their epistemological paradigms are also affected by the mediatization process which they are subjected to in the Web.Digital competence is essential for building a meaningful curriculum of history, which could generate relevant knowledge for the contemporary world through digital artefacts that can start the change in didactic practices.The traditional analogical supports, primarily the text books, could be overtaken by the aggregation of technological mediators. The digital mediators can make historical culture both evident and significant, and they can support the intellectual training that history asks of students.
Unintentional Receptive Ecumenism: From Ecclesial Margins to Ecumenical Exemplar – A New Zealand Case Study
Authors: Pratt Douglas 
Published: September 2016

Abstract
The Community Church of St John the Evangelist, situated on a relatively remote island off the east coast of New Zealand, is a unique ecumenical venture supported by the Anglican, Catholic, Methodist and Presbyterian Churches. This paper describes and situates this venture and discusses its development and modus vivendi in light of the paradigm of receptive ecumenism. This paradigm did not feature in the thinking of those who established this ecumenical community church; nevertheless it is argued that the paradigm aptly applies, so yielding the phenomenon of an unintentional receptive ecumenism at work.
The Assessment of short-term effect of L-Citrulline on endothelial function via FMD to NMD ratio in known CAD patients: A randomized, cross-over clinical trial (Clinical trial number: NCT02638727)
Authors: Safi Morteza , Mahjoob Mohammad Parsa , Nateghi Saeed , Khaheshi Isa , Akbarzadeh Mohammad Ali , Naderian Mohammadreza 
Published: September 2016

AbstractBackground. Recent studies have confirmed the essential and paramount role of the L-Citrulline on the nitric oxide regulation and the endothelial function improvement.Materials and Methods. In this cross-over clinical trial, thirty patients, diagnosed with coronary artery disease (CAD) and flow mediated dilation to nitroglycerin dependent vasodilation (FMD/NMD) ratio less than 1, were included. The patients were randomly divided into two groups of 15 patients and underwent treatment by L-Citrulline or placebo for 15 days, in 2 step protocol. The indicators of assessment in the current study were the ratio of the FMD/NMD and FMD value.Results. In the current cross-over clinical trial, the mean of FMD to NMD ratio and mean FMD value of all patients before starting the protocol were 0.91 ± 0.08 and 4.04 ± 0.51 mm, respectively. The final results of study showed that following L-Citrulline administration, mean FMD to NMD ratio and mean FMD value were enhanced to: 1.03 ± 0.09 and 4.96 ± 0.72 mm, respectively, which were statistically significant (P<0.001 and P<0.001, respectively). However, following placebo administration, mean FMD to NMD ratio and mean FMD value were receded to: 0.92 ± 0.09 and 4.06 ± 0.22 mm, respectively, which were not statistically significant (P = 0.75 and P = 0.89, respectively). Moreover, the improvement of mean FMD to NMD ratio (0.12 ± 0.02) and mean FMD value (0.92 ± 0.16 mm), following L-Citrulline administration, were statistically significant in comparison with the change of mean FMD to NMD ratio (0.01 ± 0.002) and mean FMD value (0.02 ± 0.003), following placebo administration (P<0.001 and P<0.001, respectively).Conclusion. L-Citrulline treatment can lead to improvement of the endothelial function in patients diagnosed with CAD which are assessed via FMD to NMD ratio FMD value enhancements.
Iron deficiency anemia and megaloblastic anemia in obese patients
Authors: Arshad Mahmoud , Jaberian Sara , Pazouki Abdolreza , Riazi Sajedeh , Rangraz Maryam Aghababa , Mokhber Somayyeh 
Published: September 2016

Abstract

Background. The association between obesity and different types of anemia remained uncertain. The present study aimed to assess the relation between obesity parameters and the occurrence of iron deficiency anemia and also megaloblastic anemia among Iranian population.

Methods and Materials. This cross-sectional study was performed on 1252 patients with morbid obesity that randomly selected from all patients referred to Clinic of obesity at Rasoul-e-Akram Hospital in 2014. The morbid obesity was defined according to the guideline as body mass index (BMI) equal to or higher than 40 kg/m2. Various laboratory parameters including serum levels of hemoglobin, iron, ferritin, folic acid, and vitamin B12 were assessed using the standard laboratory techniques.

Results. BMI was adversely associated with serum vitamin B12, but not associated with other hematologic parameters. The overall prevalence of iron deficiency anemia was 9.8%. The prevalence of iron deficiency anemia was independent to patients’ age and also to body mass index. The prevalence of vitamin B12 deficiency was totally 20.9%. According to the multivariable logistic regression model, no association was revealed between BMI and the occurrence of iron deficiency anemia adjusting gender and age. A similar regression model showed that higher BMI could predict occurrence of vitamin B12 deficiency in morbid obese patients.

Conclusion. Although iron deficiency is a common finding among obese patients, vitamin B12 deficiency is more frequent so about one-fifth of these patients suffer vitamin B12 deficiency. In fact, the exacerbation of obesity can result in exacerbation of vitamin B12 deficiency.