bluuebunny/crossref_metadata_2025_split huggingface dataset:
Mechanical Spectroscopy: Some Applications On Structural Changes And Relaxation Dynamics In Soft Matter
Authors: Wu Xuebang , Liu Changsong 
Published: November 2015

Abstract
The general trend in soft matter is to study systems of increasing complexity covering a wide range in time and frequency. Mechanical spectroscopy is a powerful tool for understanding the structure and relaxation dynamics of these materials over a large temperature range and frequency scale. In this work, we collect a few recent applications using low-frequency mechanical spectroscopy for elucidating the structural changes and relaxation dynamics in soft matter, largely based on the author’s group. We illustrate the potential of mechanical spectroscopy with three kinds of soft materials: colloids, polymers and granular systems. Examples include structural changes in colloids, segmental relaxations in amorphous polymers, and resonant dissipation of grain chains in three-dimensional media. The present work shows that mechanical spectroscopy has been applied as a necessary and complementary tool to study the dynamics of such complex systems.
Mechanical Spectroscopy Of Equal-Channel Angular Pressed Fe-Cr Alloys And Tungsten
Authors: Hao Ting , Tang Haiyin , Jiang Weibin , Wang Xianping , Fang Qianfeng 
Published: November 2015

Abstract
Internal friction technique was used to investigate the microstructural stability of equal-channel angular pressed (ECAP) 9Cr1Mo steel (T91), Fe-18wt.%Cr alloy, and pure W. Several non-relaxation internal friction peaks are observed in three ECAP-strained specimens, which are related to the microstructural transition from a severely deformed state to a static recovery state of dislocations, and to recrystallized state. Along with the disappearance of the P1 peak, another relaxation internal friction peak P2 is observed during the second heating run only in Fe-18wt.%Cr alloy, and it does not disappear even during subsequent third heating run. This peak is not observed in T91 steel and W. The P2 peak is likely associated with a process of grain boundary (GB) sliding. Unlike T91, no abundant carbide precipitates distribute on GBs to pin GB and repulse GB sliding, thus, the P2 peak only occurs in Fe-18wt.%Cr alloy. It is concluded that high-temperature internal friction measurements are required to detect the grain boundary peak in pure W.
Surface Modification Of Implants For Bone Surgery
Authors: Marciniak J. , Szewczenko J. , Kajzer W. 
Published: November 2015

AbstractThe study discusses the methods of surface modification methods for AISAI 316 L steel and Ti6Al4V ELI titanium alloy, dedicated to complex design implants used in bone surgery. Results of structural tests have been presented along with those evaluating the physicochemical properties of the formed surface layers. Clinical feasibility of the surface layers has also been evaluated.The developed surface modification methods improved the resistance to pitting, crevice and stress corrosion and ensured better biocompatibility. Moreover, the layers formed are marked by plasticity. Results of the tests performed show applicability of the evaluated methods of surface modification in complex shape implants for the clinical use.
Micromachining And Pattering In Micro/Nano Scale On Macroscopic Areas
Authors: Marczak J. 
Published: November 2015

AbstractThis paper presents detailed discussion of selected examples of laser technologies for the modification of solid surfaces, including topographic and microstructural changes as well as both these alterations simultaneously. Laser surface micromachining has just entered the new generation of technologies that are used in surface engineering. It will be shown on the examples of applications in bioengineering, on the base of the author’s own research, in modification of materials such as titanium and its alloys, diamond-like layers (DLC) deposited on silicon and polymer substrates.
The Tin Coatings Utilisation As Blood Contact Surface Modification In Implantable Rotary Left Ventricle Assist Device Religaheart Rot
Authors: Kustosz R. , Altyntsev I. , Darlak M. , Wierzchoń T. , Tarnowski M. , Gawlikowski M. , Gonsior M. , Kościelniak-Ziemniak M. 
Published: November 2015

Abstract
Constructions of the mechanical-bearingless centrifugal blood pumps utilize different types of non-contact physical bearings, which allows to balance the forces that have an impact on the pump impeller, stabilizing its position in the pump house without wall contact. The paper presents investigations of the hybrid (passive magnetic bearings and hydrodynamic bearings) suspension system for the centrifugal blood pump. Numerical simulations were used to evaluate the hydrodynamic bearing lifting force and magnetic bearing forces interaction. An important aspect of rotor suspension system design was the nominal gap in hydrodynamic bearing area in order to reduce the blood damage risk in this region. The analyses results confirmed that for a small diameter centrifugal pump, the nominal operating hydrodynamic bearing gap could be established within the range from 0.033 to 0.072 mm.
Biocompatibility Issue Of Tissue Engineered Heart Valves
Authors: Wilczek P. 
Published: November 2015

Abstract
Tissue engineering is a new field of knowledge which creates the possibilities for producing bioactive cardiac prostheses that will characterize by biomechanical and morphological properties similar to native tissue. It is expected that it will be characterized by high durability, which is very important from the social and clinical point of view. The aim of the study was to compare the cytotoxic effect of enzymatic and detergent acellularization methods commonly used for the biological scaffold preparation. It seems that the use of enzymatic methods, allows efficient donor cells removal while maintaining the ability to autologous cell seeding. Heart valves bioprosthesis created using these techniques, may be a good alternative to the currently used prostheses.
Biocompatible Evaluation Of Biomaterials Used In The New Polish Extracorporeal Pulsatile Heart Assist Device ReligaHeart EXT
Authors: Gonsior M. , Kustosz R. , Kościelniak-Ziemniak M. , Wierzchoń T. 
Published: November 2015

Abstract
The innovative extracorporeal heart support device ReligaHeart (RH EXT) has been developed, based on POLVAD ventricular assist device clinical experience, collected in more than 300 patient applications. The innovative surface engineering technologies are applied in ReligaHeart EXT device. The pump is manufactured of new generation, modified surface structure, biocompatible polyurethanes, and equipped with original tilting disc valves, Moll type. The valve ring is made of titanium alloy, TiN+Ti2N+αTi(N) diffusive layer modified, produced with glow discharge at plasma potential, in order to obtain the lowest thrombogenicity. The valve disc is made of polyether ether ketone. The complex in vitro and in vivo biological evaluations were performed, confirming both biomaterials biocompatible properties and device biocompatibility, proved in 30 days animal heart support.
Bio-Inspiered Blood-Contacting Materials Elaborated For The Heart Assist System
Authors: Major R. 
Published: November 2015

AbstractThe paper presents the main achievements of the author on the development of blood contacting materials. The main objective of the work is to elaborate materials dedicated for the heart support systems. Appropriately designed biomaterial surfaces enable fully controlled cellular differentiation, proliferation, and even restoration of the tissue structure on solids. The paper presents two approaches to modify the surface, which can control the life processes of tissue. The first solution considers the topography in the form of cell niches. The main objective of the study is a modified surface of thin films deposited on the polymer substrate constituting the microenvironment for the cells caused by residual stress and optimized stiffness of the surface using the plasma methods. The research hypothesis was the plasma surface modification method generating a controlled contribution of residual stress in the coating affect the surface topography in the form of nano- wrinkles similar to the niches in the tissue environment. Topography and stiffness of the surface coating allows the targeted cellular differentiation. The properly formed surface topography effectively inhibits blood clotting processes. The second solution considers implementation of self-organizing feature of extracellular matrix like coatings and selective cell mobilization. The multiscale analysis and phenomenologic description were performed to experimental research. For this purpose, the deposition method was based on electrostatic interactions in polyelectrolytes. This type of cell-polymer structure imitate the native structures.
Assessment Of Joints Using Friction Stir Welding And Refill Friction Stir Spot Welding Methods
Authors: Lacki P. , Więckowski W. , Wieczorek P. 
Published: November 2015

Abstract
FSW (Friction Stir Welding) and RFSSW (Refill Friction Stir Spot Welding) joints have been increasingly used in industrial practice. They successfully replace fusion-welded, riveted or resistance-welded joints. In the last two decades, dynamic development of this method has stimulated investigations of the fast methods for joint diagnostics. These methods should be non-destructive and easy to be used in technological processes. The methods of assessment of joint quality are expected to detect discontinuities in the structures welded using FSW and FSSW methods. Reliable detection of flaws would substantially extend the range of applications of FSW joints across many sectors of industry, including aviation. The investigations carried out in this paper allowed for characterization of defects present in FSW and RFSSW joints. Causes of these defects were also stressed. An overview of the methodologies for assessment of joint quality was presented. Results of assessment of the quality of joints made of 2024T6 aluminium sheet metal using FSW and RFSSW method were presented.
Growth Law For Peritectic Phases Formation In The Zinc Coating
Authors: Guzik E. , Kopyciński D. , Wołczyński W. 
Published: November 2015

Abstract
Some experiments dealing with the isothermal hot dip galvanizing were carried out. The (Zn) – coating settled on the Armco-iron substrate were examined after arresting the solidification for different periods of time. The measurement of the thickness of each sub-layer in the coating were performed due to the SEM – analysis. The zinc segregation on the cross-section of the studied sub-layers were also determined by the EDS technique. The growth laws are formulated mathematically for each of the observed sub-layer. The mechanism of the sub-layer formation is also analysed due to the observation of the birth/nucleation of the phases in the sub-layers and the effect of flux onto the sub-layers morphology formation. The appearance of each phase is referred to the Fe-Zn diagram for stable equilibrium according to which these phases are the products of the adequate peritectic transformation.
Bimetallic Casting: Ferritic Stainless Steel – Grey Cast Iron
Authors: Wróbel T. , Szajnar J. 
Published: November 2015

Abstract
The paper presents the problem of obtaining a permanent diffusional joint between the working surface layer and the base part in a bimetallic casting. The studied bimetallic casting was obtained as a result of using the founding method of layer coating directly in the cast process. The casting prepared using this method consists of two fundamental parts, i.e., the grey cast iron base and the working surface layer which constitutes of X6Cr 13 high-chromium stainless steels plate. Based on the obtained results it was confirmed that the decisive phenomena that are needed to create a permanent joint between the two components of the bimetallic casting are carbon and heat transport from the high-carbon and hot base material which was poured into the mould in the form of liquid metal to the low-carbon and cold material of the working layer which was placed in the mould cavity in the form of a monolithic insert.
Wire Electrical Discharge Machining Of Feal Intermetallic Sinters Without And With Addition Of Nano-Al2O3 Oxide Ceramic
Authors: Ziętala M. , Durejko T. , Łazińska M. 
Published: November 2015

AbstractThe influence of the parameters of wire electrical discharge machining (WEDM) on the surface layer of FeAl based sinters with and without Al2O3nanoceramic addition has been studied in this paper. The properties of the sinters surface layer were controlled by WEDM parameters, including time of interval (tp) and amplitude of current (IA). The WEDM roughing and finishing treatments were carried out for selected technological parameters of process. The surface texture (ST) of the sinters after WEDM was analyzed by profilometer method. Theoretical parameters describing abrasive wear resistance of investigated sinters were estimated on the basis on the load capacity curve.On the basis on obtained results it can be stated that there is possibility of shaping geometry of nano-Al2O3doped and undoped FeAl sinters by WEDM. Reduction of the time of interval (tp) and increase of current amplitude (IA) during WEDM deteriorate surface properties. Addition of nano-Al2O3improve the quality of the obtained surface. Applied parameters of WEDM improve theoretical abrasive wear resistance and lubricant maintenance of the nanoceramic doped material in comparison with undoped sinter.
Computer-Aided Design Method of Warp-Knitted Jacquard Spacer Fabrics
Authors: Li Xinxin , Jiang Gaoming , Ma Pibo 
Published: November 2015

Abstract
Based on a further study on knitting and jacquard principles, this paper presents a mathematical design model to make computer-aided design of warp-knitted jacquard spacer fabrics more efficient. The mathematical model with matrix method employs three essential elements of chain notation, threading and Jacquard designing. With this model, the processing to design warp-knitted jacquard spacer fabrics with CAD software is also introduced. In this study, the sports shoes which have separated functional areas according to the feet structure and characteristics of movement are analysed. The results show the different patterns on Jacquard spacer fabrics that are seamlessly stitched with jacquard technics. The computer-aided design method of warp-knitted jacquard spacer fabrics is efficient and simple.
Investigation of Circular Woven Composite Preforms for Composite Pipes
Authors: Amid Hooman , Jeddi Ali Asghar Asgharian , Salehi Manouchehr , Dabiryan Hadi , Pejman Reza 
Published: November 2015

Abstract
The main traditional technique for commercial manufacturing of composite pipes is filament winding in which the winding angle and the discontinuity of the structure (caused by starting and ending points of the winding process) are two important matters of concern. In the present study, circular woven fabric with its orthogonal net-shaped continuous structure was produced from polyester yarns. Fabric was wet with epoxy and hand lay-up was used to manufacture the composite pipes. Composite pipes were subjected to internal hydrostatic pressure and their burst strength was recorded. In addition, tensile strength of flat laminas was assessed in the warp and weft directions. We estimated and analysed the failure strength of composite pipes using Tresca’s failure criterion and Finite Element (FE) modeling. The experimental burst strength was almost 23% more than the FE model and 77% more than the theoretical estimate.
OLB: A Nature Inspired Approach for Load Balancing in Cloud Computing
Authors: Mallikarjuna B. , Venkata Krishna P. 
Published: November 2015

Abstract
Load balancing is treated as one of the important mechanisms for efficient resource allocation in cloud computing. In future there will appear a necessity of fully autonomic distributed systems to address the load balancing issues. With reference to this, we proposed a load balancing mechanism called Osmosis Load Balancing (OLB). OLB works on the principle of osmosis to reschedule the tasks in virtual machines. The solution is based on the Distributed Hash Table (DHT) with a chord overlay mechanism. The Chord overlay is used for managing bio inspired agents and status of the cloud. By simulation analysis, the proposed algorithm has shown better performance in different scenarios, both in heterogeneous and homogeneous clouds.
Clinical utility of the (-2)proPSA and evaluation of the evidence: a systematic review
Authors: Pecoraro Valentina , Roli Laura , Plebani Mario , Trenti Tommaso 
Published: November 2015

Abstract

Background: Diagnostic studies usually provide important information about the analytical and diagnostic performances. We investigated the clinical utility of (-2)proPSA in identifying patients with prostate cancer (PCa).

Methods: We performed electronic searches in five databases as well as a list of reference literature. Studies were included if they evaluated the diagnostic accuracy of (-2)proPSA in men with PSA value ranged from 2.0 to 10 μg/L. We also analyzed data about total PSA (tPSA), %(-2)proPSa, freePSA (fPSA), its percentage (%fPSA) and the prostate health index (phi). The selection of the studies, the screening of the full texts and the data extraction, as well as the assessment of risk of bias using the QUADAS-2 tool were conducted independently by two authors. Grading the quality of the evidence was carried out according to the GRADE method. The random effects model was used for the meta-analyses.

Results: We included 17 studies, including 6912 patients. The pooled sensitivity of (-2)proPSA was 90% and the summary specificity was 13%. The tPSA sensitivity and specificity were 89% and 25%, respectively. Considering (-2)proPSA, 225 men out of 1000 have been identified having PCa true positives (TP). However, 652 persons have been incorrectly identified and undergo biopsy. The majority of studies were judged to carry a moderate risk of bias. Therefore, the overall quality of evidences was deemed to be low.

Conclusions: The (-2)proPSA could be useful to identify men at risk of PCa, but its accuracy still remains uncertain and the level of evidence does not support an improved clinical utility.
Efficient Computation of Highly Oscillatory Integrals by Using QTT Tensor Approximation
Authors: Khoromskij Boris , Veit Alexander 
Published: November 2015

Abstract
We propose a new method for the efficient approximation of a class of
highly oscillatory weighted integrals where the oscillatory function
depends on the frequency parameter

ω
≥
0

${\omega \ge 0}$

, typically varying in a large interval.
Our approach is based, for a fixed but arbitrary oscillator,
on the pre-computation and low-parametric approximation of certain ω-dependent
prototype functions whose evaluation leads in a straightforward way to recover
the target integral.
The difficulty that arises is that these prototype
functions consist of oscillatory integrals which makes them difficult to evaluate.
Furthermore, they have to be approximated typically in large intervals.
Here we use the quantized-tensor train (QTT) approximation method for functional M-vectors
of logarithmic complexity in M in combination with a cross-approximation scheme for TT tensors.
This allows the accurate approximation and efficient storage of these functions in
the wide range of grid and frequency parameters.
Numerical examples illustrate the efficiency of the QTT-based numerical integration
scheme on various examples in one and several spatial dimensions.
Children’s Responsibility for Their Elderly Parents
Authors: Ignatowski Grzegorz 
Published: November 2015

Abstract
Due to physical disabilities and changes in the mental sphere, elderly people cannot always cope with a rapidly growing technology and progressive commercialization. The caring for their elderly parents belongs to the fundamental duties of adult children. One has to prepare for this task throughout the entire life. Including such ideas as care, solicitude and gratitude in the educational process and developing them is helpful in this regard. The first of these ideas has been deepened by Professor Tadeusz Kotarbiński in the analyses of the concept of ‘trustworthy protector’. Ethics of solicitude and gratitude is gaining more and more recognition among many contemporary thinkers. In the middle adulthood, when children take on the responsibility of caring for their elderly parents, these ideas will have an opportunity of a complete externalization and implementation.
Rewards and Punishments Applied in the Family Environment of Early Education Students
Authors: Sikorska Daria 
Published: November 2015

Abstract
It may be presumed that in the upbringing process the most compromising attitude is that supported by the use of both positive and negative reinforcements. In the pedagogical aspect, rewards and punishments are measures consciously applied in educational work, their aim being to trigger change in the behaviour of a young person.
Rewards and penalties applied in the upbringing process allow human behaviours to be enhanced positively or negatively. A reward informs about success: the person then does not have a reason for changing their behaviour. A punishment informs about failure, makes one revise one’s actions and change one’s behaviours, although it may also decrease the power to aim for achievement.
The aim of this article is to present parents’ opinions on the application of rewards and punishments in the family environment of early education students.
Family as a Source of School Failures
Authors: Świderska Mariola 
Published: November 2015

Abstract
School failure can be considered both as a pedagogical failure of teachers as well as a problem of a student in realizing school duties. Kupisiewicz divides the causes of school failure into: socio-economical, biopsychological and didactical. The article highlights the important role of the family as an environment determining the child’s success at school.
Similarities and Differences in Values of Polish Young Women and their parents – the Effect of Value Transmission and Value Change
Authors: Pietras Karolina , Fryt Joanna 
Published: November 2015

AbstractThe similarities and differences in values between generations reflect both the stability and change of socio-cultural trends prevailing at a specific time point as well as developmental processes occurring across the life span. Intergenerational similarities in values may be the effect of value transmission within family or consequence of sharing the same socio-cultural context, since both these processes are difficult to separate. The aims of the study were: 1) to describe similarities and differences in values preferences between young women and their both parents; 2) to determine which values may be transmitted within families. Ninety nine women aged 19-25 and their both parents filled in the Schwartz’ Portrait Value Questionnaire [PVQ- 21, Schwartz 2003]. Comparing to older generation young women showed greater preference for achievement, hedonism, stimulation and universalism as well as less preference for conformity and tradition. To assess value transmission two methods measuring similarity between family members were used. According to correlation analysis values representing conservation (conformity, tradition and security) as well as benevolence and power were transmitted in families between women, while security and two values related to self-enhancement (power and achievement) were transmitted between fathers and daughters. According to comparisons of family dyads with pseudo family dyads only mothers and daughters were found to be similar in their preference for tradition, security and power.