bluuebunny/crossref_metadata_2025_split huggingface dataset:
Temperature distribution in multi domain construction of the permanent magnet linear actuator
Authors: Tomczuk Bronisław , Waindok Andrzej 
Published: September 2013

Abstract
The transient thermal model of the permanent magnet linear actuator (PMLA) has been considered. The characteristics of heating have been calculated including the main subdomains of the actuator. The carcasses from various materials have also been considered. The calculations have been verified experimentally and a good conformity was obtained.
Effect of minimum energy control on steel loss in VR stepper motor
Authors: Bernat Jakub , Kołota Jakub , Stępień Sławomir 
Published: September 2013

Abstract
This research presents a 3D FE method for the simulation of the variable reluctance stepper motor dynamics. The proposed model is used to obtain the optimal minimum energy control law that minimizes the energy injected by the controller. The method is based on the strong coupling of field - circuit equations and extended to eddy current, motion and nonlinearity problem. The linearization technique for the coupled problem is presented. Also the lamination of the motor core is considered. In the paper the open - loop control problem is analyzed. The proposed model is validated by the comparison with measurements. Next, to demonstrate the effectiveness of the proposed optimal minimum energy control method is applied. In both cases, the examination of the variable reluctance stepper motor dynamics and the steel loss in the core is presented and compared
Analysis of instantaneous power components of electric circuit with a semiconductor element
Authors: Zagirnyak M. , Kalinov A. , Maliakova M. 
Published: September 2013

Abstract
Both a classical instantaneous power method and a method based on equations of instantaneous power orthogonal components balance have been used to analyze power processes in electric circuits with semiconductor elements. Automated method of forming instantaneous power harmonic components was used to obtain analytical expressions and numerical values of instantaneous power components of analyzed electric circuits. A coefficient for estimation of a semiconductor converter nonlinearity degree has been offered.
Position control of DC motor using fractional order controller
Authors: Ruszewski Andrzej , Sobolewski Andrzej 
Published: September 2013

Abstract
The paper presents the problem of position control of DC motor with rated voltage 24 V loaded by flywheel. The fractional order PD controller implemented in National Instruments NI ELVIS II programmed in LabView is used for controlling. The simple method for determining stability regions in the controller parameters space is given. Knowledge of these regions permits tuning of the controller and ensures required the phase margin of the system
Measuring the Performance of Local Government Entities and Analysis of their Managers’ and Personnel’s Information Needs in the Context of "New Public Management"
Authors: Zarzycka Ewelina , Michalak Marcin 
Published: September 2013

Ways to make the public sector more effective and efficient have been vigorously discussed for more than thirty years by practitioners and researchers all over the world. Public sector reforms drawing on the paradigm of an entrepreneurial and market style of management are called New Public Management (NPM). However if the concept of managing public sector entities according to the best management practices in the private sector is to be implemented and used effectively, the necessary management-aid tools must be introduced. This particularly applies to the public sector’s accounting system oriented to external reporting, to which needs to be added a management accounting subsystem with cost accounting and budgeting based on responsibility accounting and a measurement, evaluation, and performance reporting subsystem. The main research objectives of this article are the following: - to identify the management accounting methods and tools currently used by the managers of sampled local government entities (LGEs); - to identify the information needs of the LGEs’ managers and personnel related to the implementation and application of a management accounting system, and to find out what accounting methods and tools they would like to have at their disposal to improve management processes; - to evaluate the usefulness, adequacy and effectiveness of performance measurement systems used in LGEs. This article fits into the scope of world research on the implementations of the NPM concept and uses New Institutional Economy to better understand the implementation of management accounting in the public sector.
Vitamin D Immunomodulatory Potential in Multiple Sclerosis
Authors: Slavov Georgi S. , Trenova Anastasiya G. , Manova Mariya G. , Kostadinova Ivanka I. , Vasileva Tonka V. , Zahariev Zahari I. 
Published: September 2013

ABSTRACT
Multiple sclerosis (MS) is an autoimmune disease of unknown etiology whose treatment is of limited efficiency and therefore has a high social burden. As it has been suggested that myelin destruction model, the clinical manifestation and the potential of therapeutic response in MS are correlated, it is quite justifiable that we study various factors (genetic, hormonal, environmental) that take part in the autoimmune process in order to improve the control over the disrupted immune regulation. Results from epidemiological and clinical studies clearly suggest that changes in vitamin D serum concentrations are correlated with the magnitude of the risk of developing MS, the phases of relapse and remittance and with gender differences in vitamin D metabolism. Experimental and clinical studies also have established that 25-hydroxy vitamin D (25(OH)D) and 1,25-dihydroxy vitamin D (1,25(OH)2D) exert an immunomodulatory effect in the central nervous system and peripheral organs of the immune system. The standard reference range of vitamin D concentration in serum is 50-80 nmol/l - it provides normal calcium metabolism. Issues that are discussed include the vitamin D serum concentration needed to suppress the aberrant immune response in MS patients; a subgroup of MS patients suitable for vitamin D treatment, the vitamin D being applied in optimally effective and safe dosage. MS prevalence rate in Bulgaria has increased two-fold in 17 years but this is a rather short interval to be able to assume that the gene pool of the population changes. Thus further studies on possible interactions between different environmental factors and these factors’ role in the disease pathogenesis are justified and necessary.
Serum Melatonin in Women with Polycystic Ovary Syndrome
Authors: Terzieva Dora D. , Orbetzova Maria M. , Mitkov Mitko D. , Mateva Nonka G. 
Published: September 2013

ABSTRACT
There has been a surge of interest in recent years in studying the changes of serum melatonin concentrations in disorders that are associated with insulin resistance such as diabetes mellitus type 2 and polycystic ovary syndrome (PCOS).
AIM: The present study was designed to investigate the day-time and night-time levels of serum melatonin and the cortisol rhythm in women with PCOS and compare them with those of healthy women.
PATIENTS AND METHODS: This is a case-control study which included 30 women with PCOS and 25 healthy women. All hormonal measurements in both the study group and controls were carried out between days 3 and 5 counted from the beginning of the last regular menstrual cycle; they included serum levels of melatonin and cortisol at 03:00 a.m and 08:00 a.m, total testosterone (T), dehydroepiandrosterone sulfate (DHEA-S), luteinizing hormone (LH), follicle stimulating hormone (FSH), and immunoreactive insulin at 08:00 a.m. RESULTS: Women with PCOS were found to have a significantly higher melatonin level at 08:00 a.m. and smaller mean night-day difference in the concentrations of melatonin in comparison with those of healthy women (natural log (Ln) night-day difference 0.60 ± 0.10 pg/ml versus 1.15 ± 0.14, p < 0.002). Melatonin to cortisol ratios at 03:00 a.m. and 08:00 a.m. showed no statistically significant differences between the two groups (Ln melatonin/ cortisol 03:00 a.m., 1.01 ± 0.06 versus 1.05 ± 0.05; Ln melatonin/cortisol at 08:00 a.m., 0.62 ± 0.01 versus 0.56 ± 0.03, p > 0.05).
CONCLUSION: The results we obtained about the changes of melatonin in women with PCOS could help in elucidating the complex pathophysiological pattern of this disease.
Professional Burnout Syndrome Among Correctional Facility Officers
Authors: Harizanova Stanislava N. , Tarnovska Tanya H. 
Published: September 2013

ABSTRACT
INTRODUCTION: Correctional facilities present unique work places - the employees there work in tough, demanding and hazardous working conditions, in real life-threatening environment, subjected to physical and mental fatigue, risk of infectious diseases, work in shifts, with inadequate pay, etc. The aim of this study was to find the prevalence and level of burnout syndrome among employees working in the District Prison of the town of Plovdiv.
MATERIAL AND METHODS: The study included all employees that had direct contact with the inmates in the prison. We recruited 106 employees that participated in the study anonymously and voluntarily. The main instrument we used was the questionnaire designed according to the methods developed by V. Boiko, which allows identification of professional burnout syndrome in its three phases with four symptoms in each of the phases.
RESULTS: We found a high prevalence of burnout syndrome among the staff in the District Prison in Plovdiv (74.53%). All three phases of burnout were found to have a high prevalence rate - the stress phase: 48.11%, the resistance phase: 66.98%, the exhaustion phase: 41.51%. The rank in the service hierarchy was found to be a predictor in the stress phase, B = 0.701, p = 0.048, Exp(B) = 2.106, 95%CI [1.00; 4.04]. The single officers (83.33% of the divorced and 55.56% of the single employees) and those of the staff that were more highly educated (78.72%) had elevated levels of burnout syndrome, and these manifested during the first 5 years of their service in the prison (77.78%).
CONCLUSION: In Bulgaria at present the burnout syndrome has not been studied among employees working in correctional facilities. We found a high prevalence of the syndrome among the employees of the District Prison - Plovdiv. The younger, the single and the more educated employees had greater levels of burnout syndrome, which manifest during the first 5 years of their service. The results suggest that there is a need to develop and implement effective strategies to reduce and prevent development of burnout syndrome.
Notes on Orthoptera (Insecta) and their Assemblages in the Romanian Carpathians
Authors: Krištín Anton , Jarčuška Benjamín , Kaňuch Peter , Iorgu Elena Iulia , Iorgu Ionuţ Ştefan 
Published: September 2013

AbstractThe Carpathian Mountains, particularly the Eastern Carpathians, represent an area with a high diversity and endemism in grasshoppers and bush-crickets. The well-preserved mountain grassland habitats are populated by diverse orthopteran assemblages. During the second half of July 2013, we visited 24 sites in Romanian Carpathians within altitudes ranging from 237 to 1700 m a.s.l. and found 71 Orthoptera species (36 Ensifera and 35 Caelifera). These represent 37.3% of the 190 species known to occur in Romania. Nine Carpathian endemics (Isophya stysi, Pholidoptera frivaldskyi, Pholidoptera transsylvanica, Miramella ebneri, Pseudopodisma transilvanica, Isophya harzi, Isophya nagyi, Isophya sicula, Zubovskya banatica), of which the last four are endemic to Romania and Eastern Carpathians, were recorded. Four environmental characteristics, i.e. habitat type, altitude, mean temperature and precipitation on sampled sites, are used to examine the structure of orthopteran assemblages by using DCA. Also, more detailed information on the occurrence of rare and endemic species is given.
New Data on the Knowledge of Beetle Fauna (Insecta: Coleoptera) in the “Bârnova-Repedea Forest” Site of Community Importance (Rosci 01235, Iaşi, Romania
Authors: Stan Melania , Nitzu Eugen 
Published: September 2013

Abstract
103 coleopteran species, belonging to 11 families were found during our faunal sampling in 2012 in the Bârnova-Repedea Forest site. Out of them Carabus variolosus Fabricius, Lucanus cervus (Linnaeus), Cerambyx cerdo Linnaeus, Morimus funereus Mulsant and Rosalia alpina (Linnaeus) are species of community interest, included in the Annex II of the Habitat Directive. Carpelimus gusarovi Gildenkov and Stenus doderoi Bondroit were collected by the authors, for the first time in Romania. Carabus excellens (Fabricius), a rare species, was rediscovered in this site, and specific faunistic data on the species Colon (Myloechus) dentipes (C. R. Sahlberg) are provided for the first time.
Salinity Tolerance in Pelobates Fuscus (Laurenti, 1768) Tadpoles (Amphibia: Pelobatidae)
Authors: Stănescu Florina , Iosif Ruben , Székely Diana , Székely Paul , Roşioru Daniela , Cogălniceanu Dan 
Published: September 2013

AbstractWe investigated the effect of salinity on larval development and survival rate to metamorphosis in the common spadefoot toad Pelobates fuscus (Laurenti, 1768). Our hypothesis was that higher salinity would decrease tadpole survival rate and body size at metamorphosis, and delay metamorphosis. The response of the tadpoles was evaluated through an experimental design with three salinity treatments of 2, 4, and 8‰ compared to a control (deionized water). Survival varied across the treatments: neither of the tadpoles in 8‰ salinity treatment survived the experiment, nor achieved metamorphosis. Salinity levels of 2 and 4‰ had no significant influence on the mean time to metamorphosis, body mass and SVL at metamorphosis. Our results suggest that P. fuscus tadpoles have a tolerance threshold for brackish water up to 4‰, above which survival is impaired.
Spatial and Temporal Distribution of the Zooplankton Biomass in Sfântu Gheorghe Branch (The Danube Delta, Romania) in Relation to Environmental Factors
Authors: Florescu Larisa , Parpală Laura , Dumitrache Alina , Moldoveanu Mirela 
Published: September 2013

Abstract
Sfântu Gheorghe fluvial branch belongs to the macroregional hydrological system of the Danube Delta. In order to improve the navigation on the river branches, between 1983 and 1989 various technical works have been initiated, which later proved to be one of the most aggressive factors leading to changes over time in the Danube Delta. The influence of anthropogenic impact on the zooplankton biomass distribution patterns in Sfântu Gheorghe was investigated in 2008 - 2010 interval. From this perspective, the aim of this paper was to emphasize the structure and distribution of zooplankton in the new conditions of the river system. Seasonal sampling shows that Copepoda and Cladocera were the dominant groups while the protozoans (Ciliata and Testacea) presented the smallest values of biomass and also emphasized distinct differences among the three sampling periods: summer, spring and autumn.
Phase equilibria of the Al-Cr-Pr ternary system at 773 K
Authors: Liang Yong , Wei Shuangjie , Ling Maoxing , Liu Ya , Pang Mingjun , Zhan Yongzhong , Zhou Wenbiao 
Published: September 2013

Abstract
The phase equilibria of the Al-Cr-Pr ternary system at 773 K have been experimentally determined based on results of X-ray diffraction, scanning electron microscopy and energy-dispersive X-ray analysis. 2 ternary compounds, Al20Cr2Pr and Al8Cr4Pr, as well as 11 binary compounds, i. e. Al7Cr, Al4Cr, α-Al9Cr4, α-Al8Cr5, AlCr2, α-Al11Pr3, Al3Pr, Al2Pr, α-AlPr, AlPr2 and β-AlPr3 were confirmed. No compound was found in the Pr-Cr binary system. The isothermal section of the Al-Cr-Pr ternary system at 773 K consists of 15 three-phase regions, 30 two-phase regions and 16 single-phase regions. Homogeneity ranges of intermetallic compounds at 773 K have been determined.
Modification of the luminescent properties of ZnS nanoparticles by the adsorbed species
Authors: Serrano Thelma , López Israel , Vázquez Alejandro , Gómez Idalia 
Published: September 2013

Abstract
We report the modification of the luminescent properties of ZnS nanoparticles by the adsorbed chemical species. ZnS nanoparticles were prepared via microwave-assisted synthesis. The effects of the concentrations of citrate and SO4
2− ions on the optical properties were analyzed by means of UV-Vis and photoluminescence spectrophotometries, and Fourier-transform IR spectroscopy. ZnS nanoparticles were also analyzed by means of X-ray diffraction and transmission electron microscopy. The results confirm that the luminescent properties of the synthesized particles are affected by the adsorbed chemical species (citrate and SO4
2− ions). ZnS nanoparticles synthesized with 30 and 45 mM Na2SO4, and 2 mM trisodium citrate exhibit higher intensity of luminescence than those synthesized with 15 mM Na2SO4. The average diameter of the ZnS nanoparticles synthesized under these last experimental conditions is about 20 nm.
Study of Dental Treatment Received by Attenders in Government General Dental Center/Hospital Dugbe, Ibadan-Nigeria: A 5-Year Longitudinal Retrospective Study
Authors: Olaleye AO 
Published: September 2013

ABSTRACT
A study to determine the different types of received patients attending the Government Dental Center/Hospital, Dugbe Ibadan, Nigeria between December 1999 and December 2004 and to see how this treatment is distributed among different sexes and age groups. Government Dental Center Dugbe, Ibadan, was the Pioneer Dental Center in the South-Western Region of Nigeria and was established in the precolonial era. The treatment pattern noticed was an alarming rate of extractions which accounts for 76.65% of all patients treated, dentures (6.96%), scalings (15.80%), filings (0.32%), medication (0.24%), checkup (0.03%) accounted for the rest. When this result is calibrated on actual treatment given (excluding medication and checkup), patients requiring extraction jumped to 76.23%. Female to male ratio was more than 2.1 while adult to underage ratio was 3.1. Thus, there is a need to urgently address this trend before the whole population is made edentulous and to embrace a preventive policy programmed in dentistry.

Clinical significance
There is an alarming rate of dental extraction which constitutes the commonest procedure carried out in this study in Nigeria.

How to cite this article
Olaleye AO. Study of Dental Treatment Received by Attenders in Government General Dental Center/ Hospital Dugbe, Ibadan-Nigeria: A 5-Year Longitudinal Retrospective Study. World J Dent 2013;4(2):86-91.
Dermatoglyphics in Dentistry: An Insight
Authors: Girish HC , Sharada P , Priya NS , Babu N Chaitanya 
Published: September 2013

ABSTRACT
Fingerprint analysis for personal identification is well known, as it is unique to all individuals and remains unchanged over a life time. Now it is getting identified as a useful tool in understanding the basic questions in genetics and is emerging as an independent field in dentistry as dermatoglyphics.
Dermatoglyphics are the dermal ridge configurations on the digits, palms and soles. Significant dermatoglyphics investigations have been carried for chromosomal disorders like Down syndrome, Turner syndrome, etc.
The history, embryogenesis and topology of dermatoglyphics with emphasis on the various studies involving dermatoglyphics has been focused in this review.

How to cite this article
Priya NS, Sharada P, Chaitanya Babu N, Girish HC. Dermatoglyphics in Dentistry: An Insight. World J Dent 2013;4(2):144-147.
To Evaluate and Compare the Efficacy, Cleaning Ability of Hand and Two Rotary Systems in Root Canal Retreatment
Authors: Sachdeva Jyoti , Patil Chetan R , Thangala Venugopal , Kumar Pabbati Ravi , Krishna Akash 
Published: September 2013

ABSTRACT

Aim
To evaluate and compare the efficacy, cleaning ability of hand and two rotary systems in root canal retreatment.

Methodology
Sixty extracted premolars were retreated with following systems: Group 1—ProTaper Universal retreatment files, Group 2—ProFile system, Group 3—H-file. Specimens were split longitudinally and amount of remaining gutta-percha on the canal walls was assessed using direct visual scoring with the aid of stereomicroscope. Results were statistically analyzed using ANOVA test.

Results
Completely clean root canal walls were not achieved with any of the techniques investigated. However, all three systems proved to be effective for gutta-percha removal. Significant difference was found between ProTaper universal retreatment file and H-file, and also between ProFile and H-file.

Conclusion
Under the conditions of the present study, ProTaper Universal retreatment files left significantly less guttapercha and sealer than ProFile and H-file.

Clinical significance
Rotary systems in combination with gutta-percha solvents can perform superiorly as compared to the time tested traditional hand instrumentation in root canal retreatment.

How to cite this article
Shivanand S, Patil CR, Thangala V, Kumar PR, Sachdeva J, Krishna A. To Evaluate and Compare the Efficacy, Cleaning Ability of Hand and Two Rotary Systems in Root Canal Retreatment. J Contemp Dent Pract 2013;14(3):440-444.
Comparison of Minimally Invasive and Conventional Flap Surgery for Treatment of Intrabony Periodontal Defects: A Pilot Case Controlled Study
Authors: Harrel Stephen K , Abraham Celeste M , Rivera-Hidalgo Francisco , Steffer Matthew R , Rossmann Jeffrey A , Kerns David G , Al-Hashimi Ibtisam , Solomon Eric S , Cipher Daisha J 
Published: September 2013

ABSTRACTThe purpose of this study was to compare the clinical outcome of conventional flap surgery and minimally invasive surgery for the regenerative treatment of periodontal intrabony defects in a prospective, case-controlled study design. For this purpose, nine healthy individuals with 15 periodontal intrabony defects were included in the study. Patients were randomly assigned to undergo either minimally invasive surgery or conventional flap surgery for treatment of their intrabony periodontal defect. Each patient had preoperative and postoperative X-ray and measurement of periodontal parameters by a blinded examiner. All bony defects were treated with allograft consisting of enamel matrix derivative and demineralized freeze-dried bone. Results of this study indicated that both minimally invasive and conventional flap surgery improved pocket depth and clinical attachment levels after 6 months of surgery with no significant difference between the two surgeries. The overall result of our study suggests that minimally invasive surgery is as effective as conventional flap surgery in the treatment of intrabony periodontal defects and that both techniques appear to provide a comparable outcome.How to cite this articleSteffer MR, Harrel SK, Rossmann JA, Kerns DG, Rivera-Hidalgo F, Abraham CM, Al-Hashimi I, Solomon ES, Cipher DJ. Comparison of Minimally Invasive and Conventional Flap Surgery for Treatment of Intrabony Periodontal Defects: A Pilot Case Controlled Study. J Contemp Dent 2013;3(2):61-67.