bluuebunny/crossref_metadata_2025_split huggingface dataset:
Low Cost Angle Calculator
Authors: Takáts Michal 
Published: April 2013

Shrnutí
Članek popisuje nově zavedeny programovy produkt určeny ke zvyšeni schopnosti laboratoře spalovacich motorů pro pořizovani uhlově indexovanych zaznamů rychle proměnlivych fyzikalnich veličin. Předmětem zajmu je programove vybaveni pro dodatečne převzorkovani datovych struktur zaznamenanych s využitim vnitřnich hodin akvizičniho modulu jako zdroje vzorkovacich impulzů. Vystupni datova struktura ma stejny format jako přimy zaznam pořizeny při vzorkovani impulzy z rotačniho enkoderu, namontovaneho na volny konec klikoveho hřidele motoru. V članku se vysvětluje motivace k tvorbě předmětneho SW produktu. Popisuji se principy funkce. Uvaději se přiklady požiti při vyzkumnych aktivitach pracoviště.
Dynamics in serum cytokine responses during acute and convalescent stages of Mediterranean spotted fever
Authors: Popivanova Nedialka I. , Murdjeva Mariana A. , Baltadzhiev Ivan G. , Haydushka Irina A. 
Published: April 2013

Abstract
Mediterranean spotted fever (MSF) is a re-emerging rickettsiosis in Bulgaria after 20 years of absence (1972-1992), and it has since been affecting many people annually in the endemic regions of the country. The role of cytokines in MSF is still in the focus of research due to their complex participation in the immune pathogenesis of the disease.
Aim: To study the changes in the serum cytokine concentrations in MSF patients.
Patiends and Methods: Eighty patients with MSF and 20 healthy controls were enrolled in the study. The pro-inflammatory and immunoregulatory cytokines IL-1β, TNF-α, IL-6, IL-8, IL-12, IFN-γ, IL-2, and IL-10 were studied in the burst of disease, at clinical recovery stage, and two weeks later. The disease etiology was verified by indirect IFA in the Referral Rickettsiosis Laboratory. The cytokine levels were determined by EL ISA (BioSource Europe S.A).
Results: In the disease flare up patients showed a manifold increase in the activity of IL- 1β (р < 0.01), TNF-α (p < 0.001), IL-6 (р < 0.001), and IL-8 (p < 0.001) compared with the controls. Significant elevation in IFN-γ and IL-12 values (p < 0.001) was also found. The increase in the immunoregulatory IL-10 also reached statistical significance (p < 0.001), while the rise in IL-2 did not (р > 0.05). Followed in dynamics, only IL-1β and IL-6 measured up the control levels at the time of clinical recovery. Two weeks later, in the early convalescence IL-12 and TNF-α further diminished but did not normalize their values.
Conclusion: Our findings show that MSF is characterized by a Th1 cytokine profile. The patient’s immune system responds by proinflammatory and immunoregulatory cytokine production that accompanies the rickettsial vasculitis and contributes to the healing process. The latter is probably not fully achieved in the early convalescent period, according to our data concerning some pro-inflammatory cytokines’ elevation at this period.
Correlation between salivary α-amylase and stress-related anxiety
Authors: Rashkova Maya R. , Ribagin Lora S. , Toneva Nina G. 
Published: April 2013

ABSTRACT
Salivary α-amylase is a useful biomarker that can be used in assessing human psychobiological and social behavioural processes. Studying it opens up possibilities for the creation of novel concepts concerning the interaction of biological and social processes and their impact on health and behaviour.
MATERIALS AND METHODS: The levels of salivary α-amylase and situation anxiety self-assessment using Spielberger test were measured twice in 30 individuals aged 21.37 ± 0.96 yrs (18 females and 12 males): once during stressful situation (prior to examination) and, again a month later, in stress-free environment (during a training session). Salivary α-amylase was measured using kinetic reaction kit Salimetrics LLC - USA.
RESULTS: The mean level of salivary α-amylase measured during the first measurement 156.0 ± 93.33 U/ml. During the second measurement in the absence of intense stress, the levels were two times lower - 74.03 ± 58.06 U/ml and the differences were statistically significant (P < 0.001). We found a statistically significant correlation between the levels of salivary α-amylase in both measurements (P < 0.01). The correlation coefficient was r = 0.472 (P < 0.01).
CONCLUSIONS: The adapted version of the State-Trait Anxiety Inventory score (STAI) created by Spielberger is appropriate for assessment of stress-related anxiety in young individuals. Salivary α-amylase may be used as a biomarker for objective evaluation of the psychosomatic state of individuals in a stressful environment. The combination of psychological test and objective indicator such as salivary α-amylase is an excellent tool for objective evaluation of individual’s state in stressful environment. Similar tests may be used in assessment of patients’ behaviours at dental treatment that may be considered a stressor in most patients.
Perceived sources of stress in fifth year dental students - a comparative study
Authors: Manolova Maria S. , Stefanova Vesela P. , Panayotov Ivan V. , Romieu Guilhem , Belcheva Ani B. , Markova Kremena B. , Levallois Bernard 
Published: April 2013

Abstract
Introduction: The term “stress” refers to the effect of certain external factors (physical or mental) on the individual’s physical and psychological health. Stress is very high in dental medicine. It may well be generated by the process of training in dentistry. During their training dental students express high levels of stress and considerable stress-related symptoms such as physical problems, depression, obsessive-compulsive and personality disorders. The perceived stress can be dependent on socio-cultural factors. The type of personality, gender, emotional intelligence and other individual characteristics may also influence the stress effects.
Aim: To determine the main sources of stress in students during their dental training and compare the level of stress fifth-year dental students experience in the Faculty of Dental Medicine, Plovdiv, Bulgaria and the Faculty of Dentistry in Montpellier, France.
Methods: We recruited in the study fifth-year students from the Faculty of Dental Medicine in Plovdiv, Bulgaria and the Faculty of Dentistry in Montpellier, France. The modified Dental Environment Stress (DES) questionnaire was used to assess the effect of the various stressors. The questionnaire survey was conducted between February and March 2008.
Results: The living arrangements domain indicates higher levels of stress in Bulgarian students compared to their French counterparts with significant statistical difference for all factors. In personal factors the highest levels of stress were found with respect to the reduced holidays during school year and financial problems. Exams were the highest stressor in academic work domain and for the survey as a whole. In educational environment factors the stressors with the highest significance were the interactions with patients, academic environment (for French students) and risk of cross transmitted infections (for Bulgarian students). The high stress during clinical work is related to completing the assigned clinical workload quota and the shortage of time for clinical work.
Conclusions: The students from both faculties report the highest mean levels of stress are related to examinations and clinical factors. Bulgarian students experienced higher mean levels of stress compared to their French colleges. The differences in mean stress levels are associated with socio-cultural factors and variations in educational curriculums at both dental faculties.
Prevalence of Cytomegalovirus Infection in Hospitalized Infants
Authors: Ivanov Ivan S. , Popov Nikolay I. , Moshe Rumyana I. , Terzieva Dora D. , Stefanov Rumen S. , Panova Margarita V. , Atanasova Maria V. , Zion Garty Ben 
Published: April 2013

Abstract
Data on cytomegalovirus infection (CMV) prevalence and course in hospitalized infants are rather scarce, obsolete and considerably inconsistent. AIM: to determine the prevalence, rate of clinical manifestations, risk factors and predictive capacity of clinical manifestations of CMV infection in hospitalized infants during their first year of life.
PATIENTS AND METHODS: All 163 infants hospitalized in the Pediatric Ward for Nonrespiratory Pathology in a tertiary hospital were serologically screened for cytomegalovirus infection for 10 months. In infants up to 6 months old that were CMV IgG (+) and CMV IgM (-) we followed up the CMV IgG concentration or compared it with that of their mothers. RESULTS: The CMV prevalence for the entire study sample was 33.1 ± 3.7% (54 seropositive out of 163 examined infants); in newborns it was 19.4 ± 6.7% (7 of 36), in infants aged 1-3 months - 23.8 ± 5.4% (15 of 63), in 4-6-month olds - 28.1 ± 8.1% (9 of 32), and in 7-12-month old - 71.9 ± 8.1% (23 of 32). The rates of clinically apparent infections in the respective groups was 33.3 ± 6.5%, 57.01 ± 20.2%, 53.3 ± 13.3%, 33.3 ± 16.6%, and 13.0 ± 7.17%. The overall rate of clinically apparent CMV infection in all 163 children was between 11.0 ± 2.5% and 17.2 ± 2.9%. The probability of CMV infection increased with age and duration of breastfeeding. Hepatitis, cerebral vasculopathy and pneumonia (alone or combined) turned out to be predictors of CMV infection, but none of these symptoms had a frequency greater than 22%.
CONCLUSIONS: We found a high rate of cytomegalovirus infections in hospitalized infants less than one year of age. This infection is the reason why at least 10% of the newborns and 12% of the children aged 1 to 3 months were hospitalised. The course was clinically apparent in over half of the infected children of up to 3 months of age.
Population structure of woody plants in the arid cloud forests of Dhofar, southern Oman
Authors: El-Sheikh Mohamed A. 
Published: April 2013

Abstract
This study evaluates the size frequency distribution of 11 trees and shrubs in the cloud forest in Wadi Garziz, southern Oman, in order to assess their current situation, which is affected by cutting, overgrazing and other constraints. A size class distribution and a vegetation structure analysis were applied in order to analyze the dynamics of this forest using census data from 51 plots selected across 5 transects covering the hill-slope andwadi-bed habitats. Some of the trees inhabiting the hill-slopes (e.g. Acacia senegal and Commiphora spp.) were found to exhibit an inverse J-shaped distribution with constant regeneration, whilst in the wadi bed these same trees exhibited a J-shaped distribution (i.e. of declining populations). On the other hand, Acacia etbaica inhabiting the hill-slopes exhibited a tendency towards a J-shaped distribution and an inverse J-shaped distribution in the wadi-bed. All the populations (i.e. inhabiting the hill-slopes and the beds) of Anogeissus dhofarica had a J-shaped distribution whereas all the populations of Blepharispermum hirtum had a more or less inverse J-shaped distribution. The Ziziphus spina- -christi and Acacia tortilis populations, meanwhile, exhibited the bi-modal shape of size distribution. The shrubs inhabiting the hill-slopes (e.g. Coroton confertus and Ormocarpum dhofarense) exhibited a tendency towards a J-shaped distribution; such distribution characterizes a declining population with a limited regenerational capacity. Overall, most of the examined populations, except those of Acacia etbaica in wadi-bed and Blepharispermum hirtum, seemed to be under stress from both environmental and human factors, particularly in the wadi bed. This type of study can provide a basis for the development of a management plan to support the conservation and sustainable use of forest vegetation in an arid region.
Retention of relict satellite DNA sequences in Anemone (Ranunculaceae)
Authors: Besendorfer Višnja , Mlinarec Jelena 
Published: April 2013

Abstract
Satellite DNAis a genomic component present in virtually all eukaryotic organisms. The turnover of highly repetitive satellite DNAis an important element in genome organization and evolution in plants. Here we study the presence, physical distribution and abundance of the satellite DNAfamily AhTR1 in Anemone. Twenty-two Anemone accessions were analyzed by PCR to assess the presence of AhTR1, while fluorescence in situ hybridization and Southern hybridization were used to determine the abundance and genomic distribution of AhTR1. The AhTR1 repeat unit was PCR-amplified only in eight phylogenetically related European Anemone taxa of the Anemone section. FISH signal with AhTR1 probe was visible only in A. hortensis and A. pavonina, showing localization of AhTR1 in the regions of interstitial heterochromatin in both species. The absence of a FISH signal in the six other taxa as well as weak signal after Southern hybridization suggest that in these species AhTR1 family appears as relict sequences. Thus, the data presented here support the »library hypothesis« for AhTR1 satellite evolution in Anemone. Similar species-specific satellite DNAprofiles in A. hortensis and A. pavonina support the treatment of A. hortensis and A. pavonina as one species, i.e. A. hortensis s.l.
Comparative study of in vitro, ex vitro and in vivo grown plants of Arnica montana – polyphenols and free radical scavenging activity
Authors: Nikolova Milena , Petrova Mariya , Zayova Ely 
Published: April 2013

Abstract
Arnica montana L. is an endangered species rich in sesquiterpene lactones, phenolic acids and flavonoids with high pharmaceutical value. The polyphenolic content and free radical scavenging activity of plants that had passed all stages of cultivation: micropropagation and rooting (in vitro), adaptation in greenhouse (ex vitro) and mountain conditions (in vivo) were evaluated. Four surface flavonoid aglycones [scutellarein 6-methyl ether (hispidulin), scutellarein 6,4’-dimethyl ether (pectolinarigenin), 6-OH luteolin 6-methyl ether and kempferol-6-methyl ether] were detected in the acetone exudates of the studied samples bymeans of thin layer chromatography.No differences in the accumulation of surface flavonoids were found among the tested leaf extracts of in vitro, ex vitro and in vivo samples. However, the extracts from the flowers were richer in surface flavonoids than extracts from the leaves. The methanol extracts of the samples from ex vitro and in vivo grown A. montana plants had significantly higher radical scavenging activity and polyphenolic content than the extracts of in vitro samples. The observed differences in the contents of these biologically active compounds were related to different growth conditions and stages of plant development. The biotechnological method of A. montana established holds promise for the future production of antioxidants.
First Record of Allonyx Quadrimaculatus (Insecta: Coleoptera: Cleridae) in Romania, from the Scientific Collections of “Grigore Antipa” National Museum of Natural History (Bucharest)
Authors: Kurzeluk Daniel Kazimir 
Published: April 2013

Abstract
Collecting records for Allonyx quadrimaculatus (Schaller, 1783) indicate a discontinuous range for the species; it has not been recorded in Romania until now. On the basis of a specimen collected by Dr. Nicolae Săvulescu in 1952 at Băile Herculane which is found in the Coleopteran collection of “Grigore Antipa” National Museum of Natural History (Bucharest), the presence of this species in Romania is established.
Revision of the Type Material of Ionescu Collection Related to Charipinae Subfamily (Hymenoptera: Figitidae) Deposited in the “Grigore Antipa” National Museum of Natural History (Bucharest)
Authors: Ferrer-Suay Mar , Selfa Jesús , Pujade-Villar Juli 
Published: April 2013

Abstract
Charipinae type material of Ionescu collection, deposited in the “Grigore Antipa” National Museum of Natural History (Bucharest) has been revised. Eight Charipinae species were described by this author, only one of them being considered valid after this study. They were as follow: Alloxysta lutea (Ionescu, 1969) is a new synonymy of A. brachyptera (Hartig, 1840); A. unicolor Ionescu, 1969 is a new synonymy of A. arcuata (Kieffer, 1902); A. forshagei Pujade-Villar & Ferrer-Suay, 2012, a recent new name proposed to A. bicolor (=Trischiza bicolor Ionescu, 1959), is a new synonymy of Periclistus caninae (Hartig, 1840), a rose gall-wasps inquiline; A. ionescui Pujade-Villar & Ferrer- Suay, 2012, a recent new name proposed to A. luteipes (=Pezophycta luteipes Ionescu, 1969) is a new synonymy of A. halterata (Thomson, 1862); A. mattiasi Pujade-Villar & Ferrer-Suay, 2012, a recent new name proposed to A. luteipes (=Sarothrus luteipes Ionescu, 1959) is considered incertae sedis; Charips rufus Ionescu, 1959 and Charips flavipes Ionescu, 1963 are also considered incertae sedis; and Phaenoglyphis moldavica Ionescu, 1969 is redescribed. Notes on the type material of Ionescu Collection are also given.
Rope of Cyclical Helical Surfaces
Authors: Olejníková Tatiana 
Published: April 2013

Abstract
This paper describes one method for modeling the rope of cyclical helical surfaces as surfaces of technical practice. The cyclical helical surfaces are generated by continuous movement of the circle together with the moving trihedron of the helix along this helix. The rope is composed of equal sets of cyclical surfaces in two layers. In this paper there is described the creation of straight and helical rope and vector functions of the surfaces in the rope are derived. The author visualizes the resulting surfaces in the rope obtained by its parametric approach in the MAPLE program.
Geometry and Modeling of the Oval Strand
of n0+(2n0+4)+n2 Type
Authors: Stanová Eva 
Published: April 2013

Abstract
A wire rope is a structure composed of many individual wires. The wires form two major structural elements: the strand core and the layers of the strand. There may be different shapes of strands in the rope depending on the shape of strand core. The paper deals with the mathematical geometric modeling of the oval wire strand created of n
0 + (2n
0 + 4) + n
2 wires. The number and diameter of the core wires are the initial data. The mathematical representation is in form of parametric equations of the wire axes. The equations are implemented in the Pro/Engineer Wildfire V5 software for creating the geometrical model of the strand.
Taking into Account Outer Hydrodynamic Pressure in Differential Equation of Variable Flow Rate Fluid Flow for Distributive Pressure Pipelines
Authors: Cherniuk Volodymyr V. 
Published: April 2013

Abstract
In the differential equation of variable flow rate fluid flow a component which takes into account outer hydrodynamic pressure is introduced. The variables of the equation are expressed in terms of full operating head and in terms of independent distance along the axis of the stream, i. e. this equation is reduced to a singlevariable equation.
Soil Erosion Analysis in a Small Forested Catchment Supported by ArcGIS Model Builder
Authors: Csáfordi Péter , Pődör Andrea , Bug Jan , Gribovsyki Zoltán 
Published: April 2013

Abstract
- To implement the analysis of soil erosion with the USLE in a GIS environment, a new workflow has been developed with the ArcGIS Model Builder. The aim of this four-part framework is to accelerate data processing and to ensure comparability of soil erosion risk maps. The first submodel generates the stream network with connected catchments, computes slope conditions and the LS factor in USLE based on the DEM. The second submodel integrates stream lines, roads, catchment boundaries, land cover, land use, and soil maps. This combined dataset is the basis for the preparation of other USLE-factors. The third submodel estimates soil loss, and creates zonal statistics of soil erosion. The fourth submodel classifies soil loss into categories enabling the comparison of modelled and observed soil erosion. The framework was applied in a small forested catchment in Hungary. Although there is significant deviation between the erosion of different land covers, the predicted specific soil loss does not increase above the tolerance limit in any area unit. The predicted surface soil erosion in forest subcompartments mostly depends on the slope conditions.
Influence of Regeneration Method on the Yield and Stem Quality of Black Locust (Robinia pseudoacacia L.) Stands: a Case Study
Authors: Rédei Károly , Csiha Imre , Keserű Zsolt , Gál János 
Published: April 2013

Abstract
- Black locust (Robinia pseudoacacia L.) is one of the most important forest tree species in Hungary, covering approximately 23% of the forested land and providing 25% of the annual timber output of the country. One third of these black locust stands are high forests (planted with seedlings) and the remainder coppices. According to the forestry regulations black locust stands can be regenerated both by root suckers and with seedlings in Hungary. This study investigates the influence of different regeneration methods on wood production, stem quality and health. Properly managed regeneration from root suckers produced a higher yield than regeneration from seedlings at a harvest age of 35-37 years. The results show that regeneration of black locust stands from root suckers can be recommended on good and medium quality sites without a decrease in yield or stem quality.
Evaluation of yarn lateral deformation
Authors: Krupincová G. , Drašarová J. , Mertová I. 
Published: April 2013

Abstract

The article focuses on a new approach for characterization and evaluation of lateral yarn deformation. A small review
about theoretical description and measurement possibilities will be introduced. The evaluation of yarn compression
will be done by three innovative methods (lateral deformation of yarn between two parallel plates, simulation of
binding point of fabric, cross-sectional analysis of real fabric). The analysis of yarn deformation will be carried out
for a set of samples in combination of fiber material, yarn count and given fabric structure.
Computed microtomography in the analysis of fiber migration in yarn
Authors: Toda Marta , Grabowska Katarzyna Ewa 
Published: April 2013

Abstract

This study is a short analysis of the use of computer microphotography in fiber migration testing as a modern nondestructive
testing method. Microtomography operates similarly to X-ray computed tomography systems used in
medicine, but with much better resolution owing to the use of a smaller radiation spot. The internal structure is
reconstructed as a series of two-dimensional cross-sections that are then used to create 2D and 3D morphological
objects. This process is non-destructive and does not require special preparation of a testing material.
Morphometry of retroplacental vessels in preeclampsia
Authors: Cristurean V. , Deacu Mariana , Nour Corina , Penciu Roxana-Celopatra , Aschie Mariana 
Published: April 2013

Abstract
Preeclampsia is a multisystemic disease with yet unknown etiology, specific only for human gestation and with symptoms like arterial hypertension, proteinuria and edema. The study group was composed by 65 pregnant women with gestational age between 38-40 weeks, which gave birth in Obstetrics and Gynecology Clinic of Constanta Emergency Clinical County Hospital, during January 2001 - July 2011 and was divided in two groups, A and B, depending on the blood pressure values measured during hospitalization. Group A was composed of 33 hypertensive pregnant women and group B was composed of 32 pregnant women with physiological pregnancy evolution. The retroplacental arterioles diameter was measured by specific methods of morphometry, the probes being obtained from myometrial tissue after caesarian section for both groups. Morphometric differences between spiral retroplacental arterioles of preeclampsia pregnant women and of those with physiological evolution during gestation certify the presence of incomplete structural parietal vessel wall changes in preeclampsia.