bluuebunny/crossref_metadata_2025_split huggingface dataset:
Comparison of numerically determined noise of a 290 kW induction motor using FEM and measured acoustic radiation
Authors: Al Nahlaoui Masen , Steins Hendrik , Kulig Stefan , Exnowski Sven 
Published: June 2013

Abstract
In this paper a comparison of numerically determined and measured electromagnetically exited noise of an induction motor is presented. The calculations are accomplished using FEM for an example motor, which is a 290 kW inverter-fed asynchronous machine. The approach starts with the electromagnetic and mechanical consideration. The focus is set on acoustic considerations, which contain the 3D-FE-model and measurement setup in the sound chamber.
Open architecture digital servodrive for PMSM/PMLM-based machine-tool table feed-drives
Authors: Pietrusewicz Krzysztof , Bonisławski Michał , Pajdzik Rafał 
Published: June 2013

Abstract
The paper presents the results of research work on the development of a rapidprototyping test stand for testing: servo control algorithms, trajectory generation, algorithms for increasing overall quality of the feed-drive modules within two axis (X-Y) table of the milling machine. Open architecture interface of the prepared control system lets the potential user test functionality of integration of diagnostic tools within the motion controller - directly, without taking into account communication with top-level CNC system.
A PC-based operator and diagnostic panel for Simatic S7-200 programmable controllers
Authors: Mazek Kacper , Chmiel Mirosław , Kulisz Józef 
Published: June 2013

Abstract
The paper describes a prototype operator panel, which was designed to operate with the S7-200 family of Programmable Logic Controllers (PLC-s) from Siemens. Most of the functionality of the operator panel was implemented in a computer program, which runs on a PC-class computer. The program communicates with a PLC through its communication port configured in the Freeport mode. Two kinds of interface between the PC, and the PLC are supported: wired, and wireless. For wired connection a standard PC/PPI cable supplied by Siemens is used. For wireless connection two communication modules were designed, which operate in the free 433 MHz band. The operator panel program is intuitive, and easy to use. States of PLC inputs and outputs are presented using graphical objects. It is possible to modify states of the outputs, and monitor and edit any variable in the M and V memory in the PLC. The application supports also alarming. The program can be run on any computer with the MS Windows operating system installed. This makes the solution very cost-effective. Providing both wired and wireless communication radically increases flexibility of the proposed solution. The panel can be quickly mounted in areas, where pulling new cables is inconvenient, difficult or expensive.
Comparison of approximation methods of positive stable continuous-time linear systems by positive stable discrete-time systems
Authors: Kaczorek Tadeusz 
Published: June 2013

Abstract
The positive asymptotically stable continuous-time linear systems are approximated by corresponding asymptotically stable discrete-time linear systems. Two methods of the approximation are presented and the comparison of the methods is addressed. The considerations are illustrated by three numerical examples and an example of positive electrical circuit.
PREDICTION OF CARDIOVASCULAR MORTALITY IN FUNCTIONALLY DISABLED ELDERLY – A POSSIBLE NEW SCORE / KARDIOVASKULARNI MORTALITET KOD FUNKCIONALNO ZAVISNIH STARIH OSOBA - MOGUĆI PREDIKTIVNI SKOR
Authors: Vasović Olga , Lalić Katarina , Trifunović Danijela , Milić Nataša , Jevremović Ivan , Popović Ljiljana , Paspalj Dalibor , Milićević-Kalasić Aleksandra , Ševo Goran , Despotović Nebojša , Erceg Predrag , Milosevic Dragoslav P. 
Published: June 2013

Summary
Background: We investigated the traditional and new bio- markers as predictors of cardiovascular mortality in the func- tionally disabled elderly who are living in a community.
Methods: This prospective study included 253 participants (78.3% women) aged 65 and over who were monitored for 32 months. Receiver operating curve analysis and the Cox proportional hazard model were used to identify univariate and multivariate predictors of cardiovascular mortality. The Kaplan-Meier survival curve and Log rank test were used for survival analysis.
Results: During the study, 43.1% participants died from car- diovascular diseases. Cutoff points of multivariate predictors were used to build a score system. The risk score was positive in patients with three or more of the following predictors: albumin <40 g/L, body mass index <25 kg/m2, total serum bilirubin <10.5 (imol/L, blood urea nitrogen >6.5 mmol/L and high-sensitivity C-reactive protein >2.25 mg/L. The rel- ative risk for cardiovascular mortality for someone with a positive vs. negative score was 3.91 (95% Cl: 2.55-5.98; P< 0.001). There was no change in risk after adjustment for age; sex, traditional cardiovascular risk factors, comorbidities and a number of disabilities.
Conclusions: Presence of lo* grade inflammation, malnulri tion and early signs of renal dy sfunction are essential for car- diovascular risk among the functional disabled elderly and may be assessed using the proposed new inflammatory m3lnuhffion-renal involved score (1MRIS).
Venous thromboembolism in pregnant woman — a challenge for the clinician
Authors: Diaconu Camelia , Bălăceanu Alice , Bartoş Daniela 
Published: June 2013

Abstract
Deep vein thrombosis and pulmonary embolism are two clinical entities of a single disease called venous thromboembolism. Venous thromboembolism is an important cause of maternal morbidity and mortality. Diagnosis and treatment of venous thromboembolism in pregnant women are much more difficult than in non-pregnant women. Pregnant patients were excluded from all major clinical trials investigating therapeutic combinations for acute thromboembolism. Although, for many years, the standard anticoagulant during pregnancy and postpartum was unfractionated heparin, current guidelines recommend low molecular weight heparin. The advantages of low molecular weight heparin are lower risk of bleeding, predictable pharmacokinetics, lower risk of fracture because of thrombocytopenia and heparin-induced osteoporosis.
Biotransformation of iminodiacetonitrile to iminodiacetic acid by Alcaligenes faecalis cells immobilized in ACA-membrane liquid-core capsules
Authors: Zhang Jin-Feng , Liu Zhi-Qiang , Zhang Xin-Hong , Zheng Yu-Guo 
Published: June 2013

AbstractBiotransformation of iminodiacetonitrile (IDAN) to iminodiacetic acid (IDA) was investigated with a newly isolated Alcaligenes faecalis ZJUTBX11 strain showing nitrilase activity in the immobilized form. To reduce the mass transfer resistance and to increase the toleration ability of the microorganisms to the toxic substrate as well as to enhance their ability to be reused, encapsulation of the whole cells in alginate-chitosan-alginate (ACA) membrane liquid-core capsules was attempted in the present study. The optimal pH and temperature for nitrilase activity of encapsulated A. faecalis ZJUTBX11 cells were 7.5°C and 35°C, respectively, which is consistent with free cells. Based on the Michaelis-Menten model, kinetic parameters of the conversion reaction with IDAN as the substrate were: K m = (17.6 ± 0.3) mmol L−1 and V max = (97.6 ± 1.2) μmol min−1 g−1 of dry cell mass for encapsulated cells and (16.8 ± 0.4) mmol L−1 and (108.0 ± 2.7) μmol min−1 g−1 of dry cell mass for free cells, respectively. After being recycled ten times, the whole cells encapsulated in ACA capsules still retained 90 % of the initial nitrilase activity while only 35 % were retained by free cells. Lab scale production of IDA using encapsulated cells in a bubble column reactor and a packed bed reactor were performed respectively.
Juvenile Bullous Pemphigoid – a Case Report
Authors: Kostić Kristina , Kandolf Sekulović Lidija , Zečević Radoš D. 
Published: June 2013

Abstract
Bullous pemphigoid is an autoimmune blistering disease that predominantly affects elderly persons and rarely children. We present a 12-year-old girl with sudden appearance of tense blisters on an erythematous base on the trunk, neck, hands and legs with intense pruritus. Standard laboratory test results were within the normal range except for blood eosinophilia of 12% of the total white cell count. Skin biopsy specimens showed evolving subepidermal blisters with perivascular lymphohistiocytic, eosinophil and neutrophil infiltrations in the papillary dermis. Direct immunofluorescence of perilesional skin showed linear, continuous deposits of IgG and C3 along the dermoepidermal junction. Indirect immunofluorescence showed circulating anti-basement membrane zone IgG autoantibodies at a titer of 1:80. We started treatment with systemic corticosteroids, methylprednisolone 0,5 mg/kg per day and 500 mg erythromycin 4 times a day during 10 days. After 3 days 50 mg dapsone (DDS, 4,4-diaminodiphenylsulphone) per day was added. After a few days, there were no new changes on the skin and pruritus disappeared completely.
A new aphid genus and species (Hemiptera: Aphididae: Macrosiphini) living on ferns in Costa Rica and Mexico
Authors: Nieto Nafría Juan M. , Pérez Hidalgo Nicolás , Martínez-Torres David , Villalobos Muller William 
Published: June 2013

AbstractAphid species colonising ferns belong to the subfamily Aphidinae (Hemiptera: Aphididae) and the majority of these to the tribe Macrosiphini. A new genus in this tribe and its type species:Gibbomyzus pteridophytorumnew genus,new species, are established. Apterous and alate viviparous females are described from specimens collected onBlechnum buchtieniiRosenstock (Blechnaceae) in Costa Rica and onPteridium aquilinum(Linnaeus) Kuhn (Dennstaedtiaceae) and an unidentified fern in Mexico. The taxonomic validity of the two new taxa is discussed based on morphological and molecular data. Morphologically, the new genus is compared with genera with swollen siphunculi recorded in the New World, and also with genera living on ferns anywhere in the world. The identification key by Blackman and Eastop to aphids living on ferns is modified. Molecular analyses were carried out on the sequences of a fragment of the mitochondrial gene encoding for cytochromecoxidase subunit 1 and of a fragment of the nuclear gene encoding elongation factor-1 alpha. In both analyses,G. pteridophytorumnewspeciessequences showed considerable divergence (∼4% or more) from those of 23 other species from diverse genera of Macrosiphini, supporting the conclusions of the morphological study and justifying the establishment of the new genus.
Numerical Method of Fabric Dynamics Using Front Tracking and Spring Model
Authors: Li Yan , Chern I-Liang , Kim Joung-Dong , Li Xiaolin 
Published: June 2013

AbstractWe use front tracking data structures and functions to model the dynamic evolution of fabric surface. We represent the fabric surface by a triangulated mesh with preset equilibrium side length. The stretching and wrinkling of the surface are modeled by the mass-spring system. The external driving force is added to the fabric motion through the “Impulse method” which computes the velocity of the point mass by superposition of momentum. The mass-spring system is a nonlinear ODE system. Added by the numerical and computational analysis, we show that the spring system has an upper bound of the eigen frequency. We analyzed the system by considering two spring models and we proved in one case that all eigenvalues are imaginary and there exists an upper bound for the eigen-frequency This upper bound plays an important role in determining the numerical stability and accuracy of the ODE system. Based on this analysis, we analyzed the numerical accuracy and stability of the nonlinear spring mass system for fabric surface and its tangential and normal motion. We used the fourth order Runge-Kutta method to solve the ODE system and showed that the time step is linearly dependent on the mesh size for the system.
Kinetic Energy Preserving and Entropy Stable Finite Volume Schemes for Compressible Euler and Navier-Stokes Equations
Authors: Chandrashekar Praveen 
Published: June 2013

AbstractCentered numerical fluxes can be constructed for compressible Euler equations which preserve kinetic energy in the semi-discrete finite volume scheme. The essential feature is that the momentum flux should be of the formwhereandareanyconsistent approximations to the pressure and the mass flux. This scheme thus leaves most terms in the numerical flux unspecified and various authors have used simple averaging. Here we enforce approximate or exact entropy consistency which leads to a unique choice of all the terms in the numerical fluxes. As a consequence novel entropy conservative flux that also preserves kinetic energy for the semi-discrete finite volume scheme has been proposed. These fluxes are centered and some dissipation has to be added if shocks are present or if the mesh is coarse. We construct scalar artificial dissipation terms which are kinetic energy stable and satisfy approximate/exact entropy condition. Secondly, we use entropy-variable based matrix dissipation flux which leads to kinetic energy and entropy stable schemes. These schemes are shown to be free of entropy violating solutions unlike the original Roe scheme. For hypersonic flows a blended scheme is proposed which gives carbuncle free solutions for blunt body flows. Numerical results for Euler and Navier-Stokes equations are presented to demonstrate the performance of the different schemes.
Weighted Interior Penalty Method with Semi-Implicit Integration Factor Method for Non-Equilibrium Radiation Diffusion Equation
Authors: Zhang Rongpei , Yu Xijun , Zhu Jiang , D. Loula Abimael F. , Cui Xia 
Published: June 2013

AbstractWeighted interior penalty discontinuous Galerkin method is developed to solve the two-dimensional non-equilibrium radiation diffusion equation on unstructured mesh. There are three weights including the arithmetic, the harmonic, and the geometric weight in the weighted discontinuous Galerkin scheme. For the time discretization, we treat the nonlinear diffusion coefficients explicitly, and apply the semi-implicit integration factor method to the nonlinear ordinary differential equations arising from discontinuous Galerkin spatial discretization. The semi-implicit integration factor method can not only avoid severe timestep limits, but also takes advantage of the local property of DG methods by which small sized nonlinear algebraic systems are solved element by element with the exact Newton iteration method. Numerical results are presented to demonstrate the validity of discontinuous Galerkin method for high nonlinear and tightly coupled radiation diffusion equation.
Serum Vitamin D Deficiency and its Association with Systemic Disease in Exfoliation Syndrome
Authors: Kocabeyoglu Sibel , Mocan Mehmet Cem , Irkec Murat , Pinar Asli , Bozkurt Banu , Orhan Mehmet 
Published: June 2013

Purpose To determine the association of serum vitamin D levels with exfoliation syndrome (XFS) and evaluate its impact on co-associated systemic diseases. Methods Forty patients with XFS and 40 control subjects without XFS were recruited for this study. Serum concentrations of 25-hydroxy vitamin D [25(OH) D] were measured by high-performance liquid chromatography. Vitamin D deficiency was defined as a serum 25(OH) D concentration of <20 ng/mL. A detailed medical history including hypertension, diabetes mellitus, ischemic heart disease, cerebrovascular stroke, autoimmune disease, and neurologic disorders such as Parkinson disease and Alzheimer disease was recorded. Student t test and chi-square test was used for statistical evaluations. Results The mean age of patients with XFS and control subjects was 69.6 ± 8.1 years (range 58–90 years) and 67.1 ± 6.3 years (range 60–86 years), respectively (p>0.05). Mean 25(OH) D levels did not differ between XFS (19.8 ± 8.3 ng/mL) and control (19.9 ± 10.3 ng/mL) groups (p = 0.978). Patients with XFS had higher prevalence of cerebrovascular (p = 0.026) and cardiovascular disease (p = 0.001). There was no association between the systemic disease status and serum vitamin D levels of patients with XFS. Conclusions Although vitamin D levels were similar between XFS and control subjects, the levels were found to be decreased in both groups. Patients with XFS had a significantly higher prevalence of cerebrovascular and cardiovascular disease as compared to controls independent of their serum 25(OH) D levels. Low vitamin D level does not appear to be linked to XFS in the studied population.
Retinopathy of Prematurity: A Nationwide Survey to Evaluate Current Practices and Preferences of Ophthalmologists
Authors: Sekeroglu Mehmet Ali , Hekimoglu Emre , Sekeroglu Hande Taylan , Arslan Umut 
Published: June 2013

Purpose To emphasize the demographic and occupational characteristics of ophthalmologists primarily involved in retinopathy of prematurity (ROP) care and to ascertain their practices and preferences. Methods A questionnaire was sent to all Turkish ophthalmologists known to be primarily involved in ROP. They were asked about personal and occupational characteristics, practices and preferences related to ROP care, and for their proposals related to ROP training. Results Seventy questionnaires were sent, of which 63 (90%) were returned. A total of 44 respondents reported performing laser and 13 vitreoretinal surgery. Preferred treatment was transpupillary laser photocoagulation (54.5%), mostly performed in the operating theater (84.1%) under general anesthesia (72.7%). Only 19 (30.2%) reported intravitreal injection of vascular endothelial growth factor inhibitors (anti-VEGF). Ophthalmologists from university hospitals, trained in retina during fellowship, and performing treatment for ROP more commonly performed anti-VEGF injection. Most of them studied ROP after residency and 76.2% think that ROP training during residency is inadequate for clinical practice. Conclusions This survey reveals considerable variation among Turkish ROP specialists regarding ROP care. The survey data are critical in order to develop quality improvement and help in planning more effective future programs for ROP care in terms of training.
Combined Use of a Femtosecond Laser and a Microkeratome in Obtaining Thin Grafts for Descemet Stripping Automated Endothelial Keratoplasty: An Eye Bank Study
Authors: Murta Joaquim N. , Rosa Andreia M. , Quadrado Maria Joao C. , Russo Ana D. , Brito Sergio S. , Silva Maria Fátima L. 
Published: June 2013

Purpose To evaluate the use of a femtosecond laser combined with a microkeratome in the preparation of posterior corneal disks for Descemet stripping automated endothelial keratoplasty (DSAEK). Methods This experimental study involved ultrathin DSAEK tissue preparation of 22 donor corneas unsuitable for transplantation. The first cut was performed with an Intralase® FS60 laser and the second cut with a Moria CBm 300-μm microkeratome. The thickness of the first cut was modified for each cornea to obtain a final graft thickness of less than 110 μm. Precut and postcut central pachymetry were performed with an ultrasonic pachymeter. Central endothelial cell density (ECD) was calculated before and 24 hours after tissue preparation. Results Final graft thickness was 105.0 ± 26.1 (SD) μm (range 65–117). The mean microkeratome head cut thickness was 324.5 ± 10.9 μm (range 310–345). Precut and postcut ECDs averaged 2250 ± 222 and 2093 ± 286 cells/mm2, respectively, representing 6.9% of cell loss. No corneas were perforated. Conclusions Femtosecond FS60 lasers and Moria CBm 300-μm microkeratomes can be used sequentially to prepare consistently thin DSAEK grafts with no irregular cuts or cornea perforations.
Development and Validation of an HPLC Method for Determination of Spirotetramat and Spirotetramat cis enol in Various Vegetables and Soil
Authors: Singh Balwinder , Mandal Kousik , Sahoo Sanjay K , Bhardwaj Urvashi , Battu Raminderjit Singh 
Published: June 2013

Abstract
An easy and simple analytical method was standardized and validated for the estimation of residues of spirotetramat and its metabolite spirotetramat cis enol in various substrates: okra fruits, brinjal leaves and fruits, green chili, red chili, and soil. The samples were extracted with acetonitrile, diluted with brine solution, partitioned into dichloromethane, dried over anhydrous sodium sulfate, and cleaned up by treatment with activated charcoal powder. Final clear extracts were concentrated under vacuum and reconstituted with HPLC grade acetonitrile. Residues were estimated using HPLC with a photodiode array detector and a C18 column, and confirmed by HPTLC. Acetonitrile was used as the mobile phase at 0.4 mL/min. Both spirotetramat and spirotetramat cis enol presented distinct peak at retention times of 8.518 and 7.598 min, respectively. Consistent recoveries ranging from 82 to 97% for spirotetramat and spirotetramat cis enol were observed when samples were spiked at 1.00 to 0.03 mg/kg levels. The LOQ of the method was found to be 0.03 mg/kg. The analytical method was validated in terms of parameters, including selectivity, linearity, precision, and accuracy.
Determination of Residues of Seven Carbamate Pesticides in Milk Using Ultra-Performance Liquid Chromatography/Tandem Mass Spectrometry and QuEChERS Methods
Authors: Liu Shao-Ying , Jin Quan , Huang Xi-Hui , Zhu Guo-Nian 
Published: June 2013

Abstract
An improved analytical method was developed for simultaneous quantification of seven carbamates in milk by ultra-performance LC combined with electrospray ionization triple quadrupole tandem mass spectrometry in the multiple reaction monitoring mode. Samples were extracted and purified using a modified Quick, Easy, Cheap, Effective, Rugged, and Safe (QuEChERS) method. The LOQs ranged from 0.033 to 0.23 μg/kg; reasonable recoveries (85.4 to 110.9%) of the seven carbamates in milk were demonstrated at different spike levels. The developed analytical method would be appropriate for the routine, high throughput, high sensitivity quantification of the seven carbamates using modified QuEChERS pretreatment.
Modification of AOAC Official MethodSM 998.12 to Add Filtration and/or Centrifugation: Interlaboratory Comparison Exercise
Authors: Rogers Karyne M , Cook Jo Marie , Krueger Dana , Beckmann Klaus 
Published: June 2013

Abstract
An international ring test was undertaken in 2012 among 10 international honey testing laboratories to examine the effects of filtration and/or centrifugation addition to AOAC 998.12 method (C4 sugar detection in honey). During protein extraction, when using the repetitive washing method, any insoluble material (i.e., pollen, dust) is coextracted along with protein which may result in contamination of the protein isotope value and result in a false-positive test. A modification step involving filtration and/or centrifugation to remove insoluble material before protein flocculation was proposed. Results were compared across 10 laboratories internationally and were found to be an excellent assessment of interlaboratory variability with the standard variances between laboratories better than ±0.2‰ for honey and ±0.3‰ for protein.
Pantothenic Acid (Vitamin B5) in Infant Formula and Adult/Pediatric Nutritional Formula: First Action 2012.16
Authors: Andrieux Pierre , Fontannaz Patric , Kilinc Tamara , Giménez Esther Campos , Jaudzems Greg , Dowell Dawn 
Published: June 2013

Abstract
The Stakeholder Panel on Infant Formula and Adult Nutritionals met during the AOAC Annual Meeting held September 30 to October 3, 2012 in Las Vegas, NV, to review data submitted for a method, pantothenic acid (Vitamin B5) in infant formula and adult/pediatric nutritional formula by ultra-performance LC (UPLC)-MS/MS. The method uses a simple sample preparation with chromatographic analysis by UPLC-MS/MS with positive electrospray ionization.