bluuebunny/crossref_metadata_2025_split huggingface dataset:
Effect of SiO2 Particle Size and Length of Poly(Propylene Glycol) Chain on Rheological Properties of Shear Thickening Fluids
Authors: Antosik A. , Głuszek M. , Żurowski R. , Szafran M. 
Published: October 2016

AbstractThe rheological properties of shear thickening fluids based on silica powder of particles size in range 0.10 – 2.80 μm and poly(propylene glycol) of 425, 1000, 2000 g/mol molar mass were investigated. The effect of particle size and the length of the polymeric chain was considered. The objective of this study was to understand basic trends of physicochemical properties of used materials on the onset and the maximum of shear thickening and dilatant effect. Outcome of the research suggested that an increase in the particle size caused a decrease in dilatant effect and shift towards higher shear rate values. Application of carrier fluid of higher molar mass allowed to increase dilatant effect but it resulted in the increase of the initial viscosity of the fluid.
Effect of Boron on Microstructure and Microhardness Properties of Mo-Si-B Based Coatings Produced Via TIG Process
Authors: Islak S. , Özorak C. , Sezgin C. T. , Akkaş M. 
Published: October 2016

Abstract
In this study, Mo-Si-B based coatings were produced using tungsten inert gas (TIG) process on the medium carbon steel because the physical, chemical, and mechanical properties of these alloys are particularly favourable for high-temperature structural applications. It is aimed to investigate of microstructure and microhardness properties of Mo-Si-B based coatings. Optical microscopy (OM), X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to characterize the microstructures of Mo-Si-B based coatings. The XRD results showed that microstructure of Mo–Si–B coating consists of α-Mo, α-Fe, Mo2B, Mo3Si and Mo5SiB2 phases. It was reported that the grains in the microstructure were finer with increasing amounts of boron which caused to occur phase precipitations in the grain boundary. Besides, the average microhardness of coatings changed between 735 HV0.3 and 1140 HV0.3 depending on boron content.
Mg-ZrO2 Nanocomposite: Relative Effect of Reinforcement Incorporation Technique
Authors: Hassan S.F. 
Published: October 2016

Abstract
In this study, ingot metallurgy and powder metallurgy processes were used to incorporate 0.2 and 0.7 vol% of nano-size ZrO2 particles reinforcement to develop magnesium nanocomposite. Both of the processing methods led to reasonably fair reinforcement distribution, substantial grain refinement and minimum porosity in the nanocomposites. Strengthening effect of nano-ZrO2 reinforcement in the magnesium matrix was greater when incorporated using the ingot metallurgy process. The matrix ductility and resistance to fracture were significantly improved due to the presence of nano-ZrO2 reinforcement when incorporated using the powder metallurgy process. Tensile fracture surfaces revealed that the less-ductile cleavage fracture mechanism of hexagonal close packed magnesium matrix has changed to more ductile mode due to the presence of nano-ZrO2 particles in all the processed nanocomposites.
Compressive Deformation Behavior of an Ultrafine/Nano Grained AZ31 Magnesium Processed by Accumulative Back Extrusion
Authors: Fatemi S.M. , Zarei-Hanzaki A. , Paul H. 
Published: October 2016

Abstract
An AZ31magneium alloy was processed through accumulative back extrusion (ABE) process at 280 °C up to six passes. Compressive deformation behavior of the processed materials was studied by employing uniaxial compression tests at room temperature. The results indicated that grains of 80 nm to 1 µm size were formed during accumulative back extrusion, where the mean grain size of the experimental material was reduced by applying successive ABE passes. A deformation texture characterizing with the basal plane mainly lie inclined to the deformation axis was developed. Compressive yield and maximum compressive strengths were measured to increase by applying successive extrusion passes, while the strain-to-fracture dropped. The evolution of mechanical properties was explained relying on the grain refinement effect as well as texture change. It was described that the share of different deformation mechanisms and developing of shearing regions near the grain boundaries may influence the deformation behavior of the ultrafine/nano grained AZ31 alloy.
An Efficient Algorithm for Computation of MHD Flow Ensembles
Authors: Mohebujjaman Muhammad , Rebholz Leo G. 
Published: October 2016

Abstract
An efficient algorithm is proposed and studied for computing flow ensembles of incompressible magnetohydrodynamic (MHD)
flows under uncertainties in initial or boundary data. The ensemble average of J realizations is approximated through a clever algorithm (adapted from a breakthrough idea of Jiang and Layton [23]) that,
at each time step, uses the same matrix for each of the J systems solves. Hence, preconditioners need to be built only once per time step, and the algorithm can take advantage of block linear solvers. Additionally, an Elsässer variable formulation is used, which allows for a stable decoupling of each MHD system at each time step. We prove stability and convergence of the algorithm, and test it with two numerical experiments.
Remark on zeros of solutions of second-order linear ordinary differential equations
Authors: Dosoudilová Monika , Lomtatidze Alexander 
Published: October 2016

Abstract
An efficient condition is established ensuring that on any interval of length ω,
any nontrivial solution of the equation

u
′′

=

p
⁢

(
t
)

⁢
u

${u^{\prime\prime}=p(t)u}$

has at most one zero.
Based on this result, the unique solvability of a periodic boundary value problem is studied.
Noninvasive Assessment of Coronary Artery Disease: Fractional Flow Reserved Derived from Coronary Computed Tomography Angiography (FFRCT)
Authors: Rațiu Mihaela , Rat Nora , Condrea Sebastian , Stănescu Alexandra , Opincariu Diana , Mester András , Jani Laura , Benedek Imre , Benedek Theodora 
Published: October 2016

Abstract
Invasive coronary angiography (ICA) completed by fractional flow reserve (FFR) assessment represents the main procedure that is performed in the decision process for coronary revascularization. Coronary Computed Tomography Angiography (CCTA) is an effective method used in the noninvasive anatomic assessment of coronary artery disease (CAD). However, CCTA tends to overestimate and does not offer hemodynamic data about the coronary lesions. Recent progresses made in the research involving computational fluid dynamics and image modeling permit the evaluation of FFRCT noninvasively, using data obtained in a standard CCTA. Studies have shown an improved precision and discrimination of FFRCT compared to CCTA for the diagnosis of significant coronary artery stenosis. In this review, we aimed to summarize the role of CCTA in CAD evaluation, the impact of FFRCT, the scientific basis of this novel method and its potential clinical applications.
Extensive Abdominopelvic Desmoplastic Small Round Cell Tumor — Case Report and Review of the Literature
Authors: Horváth Adrienne , Papp Zsuzsanna Erzsébet 
Published: October 2016

Abstract
Desmoplastic small round cell tumor (DSRCT) is a rare malignant tumor, which affects mostly young males and has a poor prognosis. Since 1991, when it was first described as a distinct clinical entity by Gerald WL and Rosai J, some 200 cases were reported. DSRCT arises mainly from the abdominal and pelvic cavity, causes abdominal pain or discomfort, weight loss, urinary, bowel or bile obstruction due to compression. Metastases appear most frequently in the liver and lungs. Multimodal therapy is usually indicated with chemotherapy, surgery, radiotherapy and autologous stem cell transplantation. DSRCT should be differentiated from other small, blue round cell tumors, especially hematopoietic malignancies (leukemia, lymphoma), neuroblastoma, Ewing sarcoma, PNET, rhabdomyosarcoma, malignant mesothelioma, small cell carcinoma and Wilms tumors. We report the case of a patient with an extensive abdominopelvic desmoplastic small round cell tumor, with liver metastases, in an adolescent male patient, highlighting the alert deterioration of the clinical status of the patient after the biopsy, the need for a second review of the histopathological material in order to obtain a correct diagnosis, the chemoresistance of the tumor despite an apparently good clinical status, and the severe prognosis of this type of tumor.
Correlation Between Orthodontic Forces and Root Resorption – a Systematic Review of the Literature
Authors: Vlasa Alexandru , Eremie Lia Yero , Lazăr Luminița , Bud Anamaria , Păcurar Mariana , Bud Eugen , Biriș Carmen 
Published: October 2016

Abstract
Orthodontically induced external apical root resorption (OIEARR) is a major concern regarding periodontal status after nonsurgical orthodontic treatment. The aim of this study was to assess this sequel by a systematic review of published data. For assessment, we performed an electronic search of one database for comprehensive data, using keywords in different combinations: “root resorption”, “periodontics” and “nonsurgical orthodontic treatment”. We supplemented the results searching by hand in published journals and we cross-referenced with the accessed articles. Patients included in the results presented a good general health status, with no previous history of OIEARR and no other associated pathologies. Finally, twenty-three studies were selected and included in this review. A high prevalence (69–98%) and moderate severity of OIEARR (<5 mm and <1/3 from original root length) were reported. No difference in root resorption was found regarding the sex of the patients. A moderate positive correlation between treatment duration and root resorption was found. Also, a mild correlation regarding antero-posterior apical displacement and root resorption was found.
Detection and Quantification of Periodontopathogenic Bacteria in Subgingival Plaque Samples on Patients Undergoing Orthodontic Treatment
Authors: Vlasa Alexandru , Biriș Carmen , Lazăr Luminița , Bud Anamaria , Păcurar Mariana , Bud Eugen , Eremie Lia Yero 
Published: October 2016

Abstract

Introduction: According to last years' research, periodontopathogens may have a negative impact on treatment options in patients with periodontal lesions. However, not all infected sites suffer periodontal destructions, which can be explained on the assumption that only a limited number of pathogens present in a sufficient amount, are capable of affecting the periodontal tissue. Thermal cycling polymerase chain reaction (PCR) is a new technique used for the identification and quantification of periodontopathogenic bacteria. The aim of our study was to confirm the presence of periodontal pathogens, and to evaluate the amount of microbacterial pathogens in the periodontal pockets of patients undergoing orthodontic treatment for a more predictable result.

Material and methods: A total amount of 32 subgingival samples were collected from periodontal pockets ≥6 mm in 8 patients. Clinical examinations, periapical radiographs and periodontal screenings were performed. Only patients undergoing orthodontic treatment with fixed appliances were included in the study. PCR and DNA hybridization-based identification were performed by paper-point sampling using a micro-IDent plus, Hain Lifescience Germany kit.

Results and Discussions: Results showed that bacterial load may be connected to disease progression. The prevalence of the periodontopathogenic bacteria Actinobacillus a. was established in 42.8% of cases, P. Gingivalis in 71.42%, P. Intermedia 57.14%, Bacteroides F. was found in 85.71% of cases, Treponema D. in 100% of cases. Extremely high bacterial loads were recorded for Actinobacillus a., Bacteroides F. and Prevotella I.
A Correlative Study of Spirometric Parameters and Markers of Right Ventricular Dysfunction in Pediatric Patients with Pulmonary Arterial Hypertension
Authors: Șuteu Carmen Corina , Muntean Iolanda , Blesneac Cristina , Căpîlna Brîndușa , Benedek Theodora , Togănel Rodica 
Published: October 2016

AbstractBackground:Alteration in lung function is present in children with pulmonary arterial hypertension (PAH). We aimed to study the pulmonary function indices obtained by spirometry in pediatric patients with PAH, and to correlate them with B-type natriuretic peptide (BNP) and echocardiographic parameters.Methods:Thirty-one children with PAH were enrolled in this study, of those 26 patients (83.87%) associated shunt defect and 5 patients (16.12%) were diagnosed with idiopathic PAH. Forced vital capacity (FVC), forced expiratory volume in one second (FEV1), FEV1/FVC, peak expiratory flow rate (PEFR), forced expiratory flow at 25–75% of the pulmonary volume (FEF 25–75) were evaluated by spirometry and correlated with BNP and echocardiographic parameters that reflect right ventricle function.Results:Restrictive pattern of pulmonary function was present in 51.6% (n = 16) of all PAH children. There were significant correlations between BNP with FVC (p = 0.001), FEV1 (p = 0.001), and FEV1/FVC (p = 0.001). Serum BNP level was significantly increased in the group of patients without shunt. Of those echocardiographic parameters that reflect right ventricle function, we found that TAPSE significantly correlated with PEFR (r = −0.47, p <0.01), and with FEF 25–75 (r = −0.39, p <0.01).Conclusions:Deterioration of the pulmonary function indices are correlated with BNP and echocardiographic parameters, markers of RV dysfunction. Being easy and reliable tests, pulmonary functions can be introduced among the follow-up tools in children with PAH.
Persistent Left Superior Vena Cava Associated with Hemiazygos Vein Draining in It and Absence of Left Brachiocephalic Vein, in a Patient with Congenital Heart Defect
Authors: Opincariu Diana , Stănescu Alexandra , Corduneanu Alina , Jáni Laura , Mester András , Péter Balázs Oltean , Chițu Monica , Benedek Imre 
Published: October 2016

Abstract
Persistent left superior vena cava is an anomalous vein that derives from a malfunction of obliteration of the left common cardinal vein during intrauterine life. The diagnosis can be suggested by a dilated coronary sinus as seen in echocardiography, or other imagistic methods. Due to the lack of hemodynamic impairment, and consequently with few or no symptoms, this vascular anomaly is frequently discovered incidentally. In this brief report we present the case of a 35-year-old male known with a complex congenital cardiovascular malformation that included atrial septum defect, persistent left superior vena cava and anomalous right pulmonary vein drainage in the PLSVC, diagnosed with sinoatrial block that required pacemaker implantation. Due to the patient’s medical history, investigations to decide the best approach needed for pacemaker implantation were performed, including a thoracic CT that incidentally found additional anomalies — the hemiazygos vein draining in PLSVC and the lack of the left brachiocephalic vein.
Modelling the Slab Failure of an Open Structure Acted by External Blast Loads
Authors: Nica George Bogdan 
Published: October 2016

Abstract
The explosion of bombs near buildings generally yields severe damages to the structures. Explosion resistant standards and requirements are constantly being developed and upgraded. This paper focuses on the damages which occur toa RC slab due to blast action. The numerical model replicates a ¼ scale experiment. The analysis is conducted using a software based on the recently developed Applied Element Method. This numerical method is able to model accurately all the structural behavior stages up to failure. The results are compared to experimental data available in the literature. The analysis reveals that the slab failure due to uplift pressures may be avoided by some simple reinforcing details, as they are listed in the Romanian National Annex – accidental loads of the Eurocode EN 1991-1-7.
Dam Failure Effects on Local/Regional Critical Infrastructures
Authors: Pîrvuleţu Marius-Eugen , Drăghia Aurelian Florentin 
Published: October 2016

Summary
The paper will focus on multi-hazard assessment following the failure of the Ezer dam on Jijia river. All induced risks are analyzed in terms of critical infrastructure protection, considering three possible failure scenarios.
The challenge of these scenarios is to consider the possible effects (continue effects, domino effect, cascading effects) induced by a single hazard, but which may cause one or more sequential hazards. In all three possible failure scenarios it was considered that the bottom gates are not operational, being blocked. The upper boundary condition in the model is the flood with the maximum discharge 0.1%.
This area chosen for analysis is economically underdeveloped. The protective measures are quite low and the exposure generated by accidents at the hydraulic structures or by the extreme weather conditions is quite high either for the existing economic context or for the future investments in those areas.
The implementation by the decision makers of measures for reducing the risk or the multiple risks cannot be done at regional level if all the vulnerabilities in the area are not widely known.
The Influence of Flexibility Coefficient on the Size of Internal Forces and Deformations in Circular Plates on Elastic Medium
Authors: Şandru Mirela , Butnaru Bogdan Alexandru , Furiş Dumitrel , Creţu Dan Ilie 
Published: October 2016

Abstract
This paper presents an analytical study which deals with the behavior of the circular plates in bending theory, considering the soil-structure interaction under Winkler's hypothesis. It was intended to illustrate the variation of internal forces and deformations according to the flexibility coefficient of plates considering three models: a fixed solid circular plate subjected to a uniformly distributed load, a fixed solid circular plate acted by a displacement applied on the exterior contour and a solid plate subjected to a temperature gradient. For this study the computation relations were written as a product between a dimensional and a non-dimensional factor, the last one indicating the variation of internal forces and deformations. For each type of action there are presented results obtained using the finite element method to illustrate the differences between this method and the analytical computation.
Strengths, weaknesses, opportunities and threats of virtual team in Nigerian construction industry
Authors: Odubiyi Tawakalitu Bisola , Oke Ayodeji Emmanuel 
Published: October 2016

Abstract
The rationale behind any construction project varies; it might be to achieve value, time, quality, cost or just satisfaction for the client. Irrespective of any or all of these reasons, the team members involved in conception, inception, construction and delivery of a project are aware that a good teamwork is of essence. This is in the context of growing needs of client and the ever-growing improvement in methods of project delivery as influenced by technology. This article looks into the team type in the Nigerian construction industry from the angle of a virtual team (VT) using the mixed-method research design. VT is simply a type of team wherein the members operate from different geographical regions and function majorly with the aid of information and communications technology media. Data for the study were collected from relevant literature, interviews were conducted with 20 selected professionals in the construction industry and, thereafter, a questionnaire was drafted from the results of the interviews and administered to selected relevant professionals. The study revealed that communication among team members, flexibility of operation and decision making are usually the most influencing strengths of the VT, while some of its weaknesses are a need for special training, conflict among team members and client's acceptance of team type. Reduction in time-to-market, collaboration ability of team members and delivery time of project were seen as opportunities, while recognized threats were members’ performance level and complexity of technical application. The study concludes that the success of the VT depends highly on exploiting the opportunities opened to it.
Conditions of the Implementation of Selected Early Prevention Behaviours by High School Students from Radom
Authors: Mogiła-Lisowska Jolanta , Bukowska Beata 
Published: October 2016

Abstract
The specific type of human activities that aim to maintain full health by maintaining biological, psychological and social comfort indicate the need to adopt a holistic perspective in any analysis of determinants of pro-health behaviour. When analysing the aetiology of somatic diseases, it is important to take into account biological and mental well-being as well as the connections between needs, interests and lifestyle decisions and their consequences. One of the measures used to reduce the risk of a progressive lack of immunity to non-infectious diseases is prevention, understood as actions aimed at preventing diseases or other adverse health phenomena by controlling their causes and risk factors. An important component of prevention programmes is preventing the occurrence of negative social behaviour patterns that contribute to the increased risk of diseases. Three basic components of a healthy lifestyle – regular physical activity, proper nutrition and sufficient rest and relaxation (stress management) – justify the importance of practising healthy habits from an early age. The role of promoting pro-health behaviours among children and adolescents is of particular importance in the context of increasingly sedentary lifestyles, obesity and weight problems.
The aim of this study is to analyse the determinants of physical activity and a balanced diet in the lifestyle of high school students in Radom aged 16-19. The study was conducted in 2013 at VII Krzysztof Kamil Baczyński High School in Radom and involved 140 students. The results of the study indicate that only one-third of respondents fulfilled the requirements for minimal physical activity for their subjective and objective needs of this phase of ontogenetic development, such as being in the company of their peers, spending time in open air and taking care of their physical fitness. Unfortunately, the majority of the parents of the surveyed high school students, who were at the time about 40 years old, did not engage in any systematic physical activity. In other words, the family environment of the studied young people did not promote patterns of physical activity. Similarly, healthy nutrition in the study group was lacking. Both the boys and girls ate around five meals a day, but many respondents snacked between meals on sweets and crisps. The majority of students drank water. The vast majority of them ate their meals at home, ensuring that their meals were freshly prepared and not pre-cooked.
Although school children prefer to spend time with their peers, the family is still a point of reference in terms of values and ways of spending free time. The authors of this paper must take into account the minimal impact of the family on choices regarding physical activity. The studied group of high school students demonstrated a lack of preventive care for their health and did not have a well-established systematic approach to physical activity and healthy eating habits.