bluuebunny/crossref_metadata_2025_split huggingface dataset:
Photoinduced Optical Properties Of Tl1−xIn1−xSixSe2 Single Crystals
Authors: Myronchuk G.L. , Zamurueva O.V. , Oźga K. , Szota M. , El-Naggar A.M. , Alzayed N.S. , Piskach L.V. , Parasyuk O.V. , Albassam A.A. , Fedorchuk A.O. , Kityk I.V. 
Published: August 2015

Abstract
The influence of temperature on electroconductivity and photoinduced changes of the absorption at 0.15 eV under influence of the second harmonic generation of CO2 laser for the two type of single crystals were investigated. The single crystals Tl1−xIn1−xSixSe2 (x=0.1 and 0.2) have been grown by the two-zone Bridgaman-Stockbarger method. The temperature studies of electroconductivity were done in cryostat with thermoregulation in the temperature 77 - 300 K, with stabilization ±0.1 K. Photoinduced treatment of the investigated single crystals were performed using the 180 ns pulses second harmonic generation of the CO2 laser operating at 5.3 μm. Experimental studies have shown that for the Tl1−xIn1−xSixSe2 single crystals with decreasing temperature from 300 up to 240 K and from 315 up to 270 K the conductivity is realized by thermally excited impurities with activation energies equal to about 0.24 eV and 0.22 eV for x= 0.1 and 0.2, respectively. Photoinduced absorption achieves its maximum at a power density below 100 mJ/cm2. Has been shown that the samples with x=0.2 demonstrated higher changes of the photoinduced absorption with respect to the x=0.1. With further decreasing temperature is observed monotonic decrease in the activation energy of conductivity. The origin of these effects is caused by the excitations of both the electronic as well as phonon subsystem. At some power densities the anharmonic excitations become dominant and as a consequence the photoinduced absorption dependence is saturated what were observed. Additionally, we were evaluated at given temperature the average jump length of R for localized states near Fermi level.
Microstructure And Magnetic Properties Of The FeZr(Y)NbCuB Amorphous Alloys
Authors: Gondro J. , Błoch K. , Nabiałek M. , Waltters K. , Szota M. 
Published: August 2015

Abstract
In this paper, the results of investigations are presented, into the microstructure and magnetic properties of the following amorphous alloys in the as-quenched state: Fe82Zr7Nb2Cu1B8 and Fe86Zr4Y3Nb1Cu1B5. The studied material was produced in the form of thin ribbons of 3 mm width and 20 μm thickness. The structure and microstructure of the samples have been investigated by means of Mössbauer spectrometry and X-ray diffractometry. In addition, the magnetic properties of these materials have been determined, i.e. the low-field magnetic susceptibility, and the magnetisation as a function of temperature and magnetising field.
On the basis of the performed investigations, it has been found that a minor change in the quantities of elements favouring amorphisation, such as: Zr and Y, has an influence on the value of the Curie temperature and the magnetic properties of the resulting alloys. It should be noticed that the changes, introduced in the chemical composition of the alloys, don’t change the combined volume of these elements, i.e. Zr7 and Zr4Y3.
Hilbert-Twin – A Novel Hilbert Transform-Based Method To Compute Envelope Of Free Decaying Oscillations Embedded In Noise, And The Logarithmic Decrement In High-Resolution Mechanical Spectroscopy HRMS
Authors: Magalas L.B. , Majewski M. 
Published: August 2015

Abstract
In this work, we present a novel Hilbert-twin method to compute an envelope and the logarithmic decrement, δ, from exponentially damped time-invariant harmonic strain signals embedded in noise. The results obtained from five computing methods: (1) the parametric OMI (Optimization in Multiple Intervals) method, two interpolated discrete Fourier transform-based (IpDFT) methods: (2) the Yoshida-Magalas (YM) method and (3) the classic Yoshida (Y) method, (4) the novel Hilbert-twin (H-twin) method based on the Hilbert transform, and (5) the conventional Hilbert transform (HT) method are analyzed and compared. The fundamental feature of the Hilbert-twin method is the efficient elimination of intrinsic asymmetrical oscillations of the envelope, aHT (t), obtained from the discrete Hilbert transform of analyzed signals. Excellent performance in estimation of the logarithmic decrement from the Hilbert-twin method is comparable to that of the OMI and YM for the low- and high-damping levels. The Hilbert-twin method proved to be robust and effective in computing the logarithmic decrement and the resonant frequency of exponentially damped free decaying signals embedded in experimental noise. The Hilbert-twin method is also appropriate to detect nonlinearities in mechanical loss measurements of metals and alloys.
Hilbert-Twin – A Novel Hilbert Transform-Based Method To Compute The Elastic Modulus In High-Resolution Mechanical Spectroscopy HRMS
Authors: Majewski M. , Magalas L.B. 
Published: August 2015

Abstract
A novel Hilbert-twin (H-twin) method is introduced as an alternative method for the computation of the resonant frequency for exponentially damped free decays embedded in noise. We also present the comparison among the following methods used to compute the dynamic elastic modulus in solids: the parametric OMI (Optimization in Multiple Intervals), the Yoshida-Magalas (YM) interpolated discrete Fourier transform, the Hilbert-twin (H-twin), and discrete Fourier transform (DFT) methods. It is concluded that the OMI and YM methods are the best methods to compute the elastic modulus from discrete exponentially damped free-elastic decays embedded in unavoidable noise.
Experimental Investigation Of Segregation Of Carbon Atoms Due To Sub-Zero Cryogenic Treatment In Cold Work Tool Steel By Mechanical Spectroscopy And Atom Probe Tomography
Authors: Min N. , Li H.M. , Xie CH. , Wu X.C. 
Published: August 2015

Abstract
In this work, we present mechanical spectroscopy of cold work tool steel subjected to sub-zero cryogenic soaking treatment to reveal the carbon segregation and the subsequent carbides refinement. The maximum of Snoek-Köster (SK) peak height was obtained in the sample subjected to soaking 1h at −130°C cryogenic treatment. The SK peak height is reduced with prolonging the soaking time. The results indicate that an increase in the height of SK peak is connected with an increase in dislocation density and the number of segregated carbon atoms in the vicinity of dislocations or twin planes after martensite transformation at −130°C which is confirmed by corresponding TEM and atom probe tomography measurement. Hence, it is suggested that the isothermal martensite, formed during the cryogenic soaking treatment decreases (APT) the height of SK peak.
Model Research On Deposition Of Pure Aluminium Oxide Layers By MOCVD Method
Authors: Sawka A. , Kwatera A. 
Published: August 2015

Abstract
The purpose of this research is to develop an optimal method for synthesizing of nanocrystalline Al2O3 monolayers at high growth rates on cemented carbides coated with an intermediate layer of pre-Al2O3-C (composite layers Al2O3-C/Al2O3). The use of quartz glass substrate allows for obtaining information about the quality of the layers such the thickness and density, because of its high transparency. The Al2O3 layers that do not containing carbon were synthesized on quartz glass by MOCVD using aluminum acetylacetonate and air as the reactants at temperatures of 700-1000°C. Argon was also a carrier gas. The resulting layers were transparent, as homogeneous nucleation did not occur during the synthesis process. The layers synthesized at lower temperatures were subjected to a crystallization process at temperatures above 900°C. The crystallization process was studied as a function of time and temperature. The obtained layers were characterized by their nanocrystalline microstructure.
Effects Of Environmental Factors On The Dispersion Behavior Of Iron Oxide In Aqueous Solutions With Poly Acrylic Acid
Authors: Lee E.-H. , Kim K.-M. , Maeng W.-Y. , Hur D.-H. 
Published: August 2015

Abstract
After preparing aqueous suspensions from magnetite particles with a poly-acrylic acid, we investigated the effects of several experimental parameters. We characterized the stability of the suspensions using visual inspection, sedimentation, adsorption, and thermal stability of the dispersant. The dispersion stability is affected by the solution pH, the concentrations of magnetite particles, the molecular weight, the concentration of the dispersants, and the temperature. The stability of the suspensions increased as the concentration of the dispersant and the temperature increased. In terms of the molecular weights of the dispersant, the suspensions with dispersant of low-molecular weight (1800) were more stable than those of high-molecular weight (250000) at room temperature. However, at high temperature the suspensions with high-molecular weight showed stability. The adsorption efficiency of the dispersant was very low. The dispersant of high-molecular weight showed a higher thermal integrity than that of low-molecular weight. From this work, we obtained the optimum conditions for stable aqueous suspensions of magnetite particles.
Epidemiological Characteristics and Prospective 6-Months Follow-up of Children with Pulmonary Arterial Hypertension
Authors: Carmen Şuteu , Cristina Blesneac , Rodica Togănel , Theodora Benedek 
Published: August 2015

Abstract

Introduction: Pulmonary arterial hypertension (PAH) is a rare disease associated with significant morbidity and mortality. Pediatric patients often present with mixted aetiologies.

Objectives: To characterize the epidemiology, management and outcome of pediatric PAH.

Methods: Children with PAH were included and followed prospectively for six months. WHO functional class, 6-minute walk test, biomarkers, electrocardiogram, spirometers and echocardiographic parameters were evaluated in progressive PAH group.

Results: Two hundred and four children were included in the study from July 2012 until July 2013, with a mean age of 6.13 years. Transient PAH patients (n=170, 83.33%) included newborns with persistent pulmonary hypertension (n=8, 3.92%) and children with congenital heart defects with systemic-to-pulmonary shuntflow PAH (n=162, 79.41%) in whom PAH resolved after successful surgery correction. Progressive PAH (n=34, 16.66%) included patients with idiopathic PAH (n=5, 2.45%), Eisenmenger syndrome (n=17, 8.33%) and post-operative PAH (n= 6, 2.94%). Patients with progressive PAH remained stable in regards to clinical status, WHO functional class, 6-minute walk distance, biomarkers, spirometers parameters and echocardiographic parameters with prognostic value.

Conclusions: Pediatric PAH is characterized by various age-specific diagnoses, the majority of which comprise transient forms of PAH. Pediatric PAH associated with congenital heart defects represents a heterogeneous group with highly variable clinical courses. PAH specific therapies may have contributed to disease stability and favorable outcomes.
Comparison Between Clinical and Echocardiographic Findings in Infants and Children Diagnosed with Hypertrophic Cardiomyopathy
Authors: Cristina Blesneac , Carmen Şuteu , Rodica Togănel , Theodora Benedek , Benedek I 
Published: August 2015

Abstract

Background: Hypertrophic cardiomyopathy is a rather common hereditary disease with an autozomal dominant character, caused by mutations of genes that code for proteins of the cardiac sarcomere. The observed prevalence of this disease is much lower in pediatric patients compared to adults, because it’s late gene expression. Hypertrophic cardiomyopathy presenting in infancy has been shown to have a very high mortality.

Methods: Thirty-nine patients diagnosed with hypertrophic cardiomyopathy in the IIIrd Pediatric Cardiology Department from Tîrgu Mureş were included in this study. Patients were divided into two groups: group 1 – patients diagnosed during infancy, group 2 – patients diagnosed after 1 year of age. Data regarding familial and personal history, and echocardiographic findings were compared between these two groups.

Results: Group 1 included 17 patients and group 2 - 22 patients. Positive familial history was found in both groups (group 1 – 6 cases, group 2 – 3 cases), all of them in obstructive forms. Syncope was found in four cases, all of them in group 1 (p=0.02; odds ratio 15; 95% CI, 0.7473 to 301.1). While in group 1, asymmetric septal hypertrophy was predominant (64.7%), in group 2 – concentric left ventricular hypertrophy predominated (54.5%). Obstructive hypertrophic cardiomyopathy was found in 14 patients in group 1 (82.4%) compared to 13 patients in group 2 (59.1%). Diastolic function was impaired more predominantly in group 1 (p=0.0274; odds ratio 11.67; 95% CI, 1.526 to 89.17).

Conclusions: hypertrophic cardiomyopathy has an extensive clinical variability with regard to age of onset, severity and progression of disease.
Association Between Increased Waist Circumference and Depression and Anxiety Trend
Authors: Elena Bocicor Andreea , Gabriela Buicu , Andreea Varga , Tatar R , Daniela Sabau , Tilea I , Gabos-Grecu I 
Published: August 2015

Abstract

Introduction: Abdominal adiposity assessed by increased waist circumference and depression have both a high incidence and prevalence and are associated with increased general mortality and cardiovascular risk. Several studies showed a significant association between abdominal obesity, metabolic syndrome and depression. Early detection of these associations is important for for prevention and treatment of this disease.

Material and method: Eighty patients were enrolled in a cross-sectional descriptive study. Waist circumference was measured in all patients and an increased waist circumference was considered for subjects with values higher than 80 cm in women and higher than 94 cm in men as. Patients completed standardized questionnaires HADS for assessment of depression and anxiety. A depression (D) score higher than 10 points showed a trend to depression while an anxiety (A) score higher than 10 indicated a tendency to anxiety. The association between increased waist circumference, depression and anxiety was studied.

Results: We interviewed 80 patients, 34 (43%) men (mean age 62+/−6.43) and 46 (57%) women (mean age 59+/−5.16). Increased waist circumference was recorded in 22 men, and in 30 women. We noticed a good association between increased waist circumference and both depression (p=0.0006, RR=2.007, 95%CI 1.24-3.24) and anxiety (p=0.017, RR=2.046, 95%CI 1.21-3.45). We found both anxiety and depression risks rather equal in men, while in women we observed a higher depression risk.

Conclusions: Increased waist circumference is associated to depression and anxiety tendency in both genders. Depression trend is more powerful in women, while in men both depression and anxiety seen to have an equal frequency. Psychotherapy should be added to lifestyle changes in patients with abdominal adiposity.
Office Assessed Blood Pressure and Ambulatory Blood Pressure Monitoring in Chronic Kidney Disease Patients Versus Kidney Transplant Recipients
Authors: Tarta DI , Denise Căldăraru Carmen , Cristina Tarta , Frigy A , Caraşca E , Otilia Carlan , Dogaru AG 
Published: August 2015

Abstract
How reliable is office assessed blood pressure (BP) in chronic kidney disease (CKD) patients and kidney transplant (KTx) recipients is yet to be determined, although the diagnosis of arterial hypertension has been based on these measurements. The aim of this study was to investigate the potential differences between office assessed BP and ambulatory blood pressure monitoring (ABPM) in CKD patients and KTx recipients. We conducted a prospective study which enrolled 45 patients. Morning and evening seated office BPs were assessed using a sphygmomanometer at 5 consecutive outpatient visits. A mean systolic BP (SBP) and diastolic BP (DBP) was calculated. Ambulatory blood pressure was measured over 24 hours using a Meditech ABPM-05 device. Office SBP was statistically significant higher in CKD patients than KTx recipients both in the morning and evening (p=0.0433 and p=0.0066 respectively). ABPM showed higher night-time SBPs (p=0.0445) and higher overall, day-time and night-time DBPs in KTX recipients (p=0.0001, p=0.0006, p<0.0001 respectively). In CKD patients, office SBPs and DBPs are significantly higher than overall SBPs and DBPs as assessed by 24hr ABPM. Office BP monitoring as assessed by clinician is acceptable but tends to overestimate BP in both CKD and KTx study groups.
Surgical Risk Factors of Patients with Operable Gist
Authors: Gabriella Gabos , Adina Friciu , Raluca Diac , Annamaria Magdas , Crăciun C , Coroş M , Daniela Dobru 
Published: August 2015

Abstract

Introduction: Gastrointestinal stromal tumors (GIST) are the most frequently mezenchimale tumors of the gastrointestinal tract. This study aims to analyze the results after surgical treatment of GIST and identify key risk factors influencing postoperative course of these patients in order to discover the most effective therapeutic methods to significantly improve postoperative course of these patients.

Methods: We retrospectively reviewed the medical records of all patients who underwent surgical removal of GISTs from 2004-2014. Patient demographics, criterion for admission, surgery, complications, secondary dissemination, histopathological data and clinical course were analized following patient survival at 12, 24, 36 and to 60 months postoperatively. Statistical analysis was performed using the MedCalc software program, and survival analysis was done by Kaplan Meyer.

Results: During this period we analyzed a total of 28 cases, including 13 males and 15 females with age from 33 to 80 years (median, 61). The tumor was located in the stomach (15 cases; 53%), small intestine in ten cases (36%) and other sites in three patients (11%). Multivariate analysis revealed that tumor size (P <0,05), criterion for admission (P<0,05) and secondary dissemination (P<0,05) are independed prognostic factors.

Conclusions: Factors like: age and sex of patients, size and tumor site, presence or absence of metastasis, are prognostic risk factors with significant differences in the evolution of patients with operable GIST. The small number of patients and retrospective nature of the study have created difficulties in the estimation where we concluded the need of a prospective multicentric study.
Comparative Study Regarding Activity of Emergency Dental Offices in Tirgu Mures and Oradea
Authors: Kinga Dörner , Boeriu C , Hajnal Vass , Melinda Nagy , Zsuzsa Koszta , Raluca Iurcov , Melinda Székely 
Published: August 2015

Abstract

Objective: The purpose of the study was to assess the activity of the Emergency Dental Office of UPU SMURD in Tîrgu Mures since its establishment and also to compare it with the similar unit from Oradea.

Methods: The two-year retrospective and comparative study is a statistical processing of non-personal data regarding the emergency dental services in the UPU SMURD Tîrgu Mures and UPU SMURD Oradea, involving the data collected in the same period at both emergency dental offices. Data based on the records analysis of the patients who were consulted and treated at the Emergency Dental Office in UPU SMURD Tîrgu Mure between February 1, 2012 – February 1, 2014 compared with similar data from Oradea.

Results: Assessing the number of patients presented each month – first and second year – we can see that since the establishment of the Emergency Dental Office in Tîrgu Mure (no=12780), the number of patients showed a linear increase in the first year, and in the second year the constant number of patients present in the studied unit was higher than in the other center from Oradea (no=4886).

Conclusions: The large number of patients and the nature of the cases that were present in the Emergency Dental Office in the UPU SMURD Tîrgu Mure show how necessary the set-up of this unit was.
Assesing the Knowledge, Attitudes and Eating Habits of Dietary Fibers in Tîrgu-Mureş Population
Authors: Victoria Stere , Monica Tarcea , Florina Ruta 
Published: August 2015

Abstract

Background: The aim of the study was to assess the knowledge, attitudes and eating habits upon consumption of dietary fibers in a group of people from Tirgu-Mures area.

Material and Method: We used a transversal descriptive study conducted on a group of 251 subjects from the urban area (76.4%), as well as from the rural area (23.6%), aged between 18 and 62 years, obtained using an online questionnaire consisting of 40 questions related to knowledge and attitude towards dietary fibers and estimated consumption of fiber from whole foods.

Results: In the study group, we observed that 21.28% consumed whole cereals once per week and 18% did not consume cereals at all; regarding fruit consumption 17.44% consumed 6-8 pieces/week, and 3.4% consumed over 18 pieces/week. Frequency of fast food –meals consuming: 67.68% did not consume fast-food meals, 25.25% ate fast food once/week, and 1.1% consumed fast food between 8-10 times/week. Concerning the statement that fibers can prevent and/or treat colon cancer and obesity, 40% fully accepted the statement, 40% agreed, 14.29% were indifferent and 4.7% were against. From the total group of subjects, approximately 37.6% knew the meaning and classification of dietary fiber, 26.8% knew the recommended amount of fiber to be consumed daily, and 5.9% did not check the fiber content of foods ever.

Conclusions: The inclusion of cereals and whole foods in diet is recommended in all nutrition guidelines worldwide, because of their association with a high health status, and prevention of chronic diseases. Consumers need to understand the benefits of whole foods, also to recognize and read the information about it on food labels.
Low Molecular Weight Heparin versus Coumadin-Induced Skin Cecrosis in a Patient with Superficial Vein Thrombosis - A Case Report
Authors: Nicoleta Sala , Oana-Cristiana Burdun , Maria Botoman , Andrea Rab , Ariana Bancu Ligia , Corina Ureche 
Published: August 2015

Abstract

Introduction: Coumadin and low molecular weight heparin (LMWH) induced skin necrosis are rare clinical conditions.

Case presentation: A 63-years-old female patient, known with hypertension and right-sided hemiparesis, had presented to the emergency departement with pain and erythema of her internal right thigh. Venous Doppler-echography showed internal safenous vein thrombosis, thus she was started on anticoagulant treatment with Dalteparin and Acenocoumarol. On the 5th day of treatment she developed plantar hematoma on her left leg, followed by the appearance of hematomas, on the lower third of her right calf and on coxofemoral regions. Therefore, we raised the suspicion of heparin or coumadin-induced cutaneous necrosis, we stopped the anticoagulation for 5 days and restarted it with the administration of Rivaroxaban, fresh frozen plasma, antibiotics and local, sterile, saline dressings. After four days the patient presented deep vein thrombosis on her left calf.

Results and Discussion: Coagulation abnormalities were suspected, but infirmed by normal values of specific laboratory tests, such as Protein C (472.2%), protein S (77.10%), lupus anticoagulant (LA1-screening 53, 5s, LA-confirmation 38,0s). Hemogram showed normal platelet values. To exclude a malignancy, abdominal CT scan was performed, which revealed a right adnexal inomogenic cystic lesion, CA-125 (6,5U/ml), requiring further gynecological investigations. For the treatment of skin lesions, the patient required necrectomy and skin graft application.

Conclusion: Particularly, considering that the patient was initially anticoagulated with LMWH and coumadins simultaneously, the etiology of her cutaneous lesions remains uncertain.