bluuebunny/crossref_metadata_2025_split huggingface dataset:
Disentangling the Arcturus stream
Authors: Kushniruk Iryna , Bensby Thomas 
Published: September 2019

Context. The Arcturus stream is an over-density of stars in velocity space and its origin has been much debated recently without any clear conclusion. The (classical) dissolved open cluster origin is essentially refuted; instead the discussions try to distinguish between an accretion, a resonant, or an external-perturbation origin for the stream. As kinematic structures are observational footprints of ongoing and past dynamical processes in disc galaxies, resolving the nature of the Arcturus stream may provide clues to the formation history of the Milky Way and its stellar populations.
Aims. We aim to characterise the kinematical and chemical properties of the Arcturus stream in order to resolve its origin.
Methods. The space velocities, angular momenta, and actions for a sample of more than 5.8 million stars, composed from Gaia DR2 were analysed with a wavelet transform method to characterise kinematic over-densities in the Galactic disc. The kinematic characteristics of each identified group is used to select possible members of the groups from the GALAH and APOGEE spectroscopic surveys to further study and constrain their chemical properties.
Results. In the velocity and angular momentum spaces the already known Sirius, Pleiades, Hyades, Hercules, AF06, Arcturus and KFR08 streams are clearly identified. The Hercules stream appears to be a mixture of thin and thick disc stars. The Arcturus stream, as well as the AF06 and KFR08 streams, are high-velocity and low-angular momentum structures with chemical compositions similar to the thick disc. These three groups extend further from the Galactic plane compared to the Hercules stream. The detections of all the groups were spaced by approximately 20 − 30 km s−1 in azimuthal velocity.
Conclusions. A wide spread of chemical abundances within the Arcturus stream indicates that the group is not a dissolved open cluster. Instead the Arcturus stream, together with the AF06 and KFR08 streams, are more likely to be part of a phase-space wave, that could have been caused by a merger event. This conclusion is based on that the different structures are detected in steps of 20 − 30 km s−1 in azimuthal velocity, that the kinematic and chemical features are different from what is expected for bar-originated structures, and that the higher-velocity streams extend further from the disc than bar-originated structures.
Balintgruppen über das Internet – Balint 2.0
Authors: Nease Donald E. 
Published: September 2019

ZusammenfassungDie International Balint Federation hat mit der WONCA Young Doctors Movement Group (Weltorganisation für Hausärzte) zusammengearbeitet, um die Bereitstellung von Online-Balint Group-Sitzungen für junge Hausärzte weltweit zu testen und zu bewerten. Wir fassen hier die Arbeit und die Ergebnisse sowie die laufenden Aktivitäten zusammen, um diese Arbeit voranzutreiben.
Bilateral Dislocation of Mandibular Condyles following General Anesthesia—An Overlooked Problem: A Case Report
Authors: Toufeeq Mohd , Kodali Murali Venkata Rama Mohan , Gunturu Srikanth , Kumar Kiran , Surapaneni Kavya 
Published: September 2019

AbstractDislocation of mandibular condyles can occur following excessive mouth opening or traumatic injury to the temporomandibular joint. It can also occur during general anesthesia that at times may go un-noticed in the modern-day theater setup. Here, we describe a case of bilateral dislocation of mandibular condyle following orotracheal intubation for general anesthesia. Right condyle was dislocated into temporal fossa.
Correlation of Bite Force Interpretation in Maximal Intercuspal Position among Patient, Clinician, and T-Scan III System
Authors: Ruttitivapanich Nitikarn , Tansalarak Ratchawan , Palasuk Jadesada , Pumklin Jittima 
Published: September 2019

Abstract
Objective The main purpose of this article was to determine the correlation of bite force in maximal intercuspal position (MIP) among patient’s perceptions, clinician subjective interpretation, and T-Scan III system.
Materials and Methods Forty-three dental students at Naresuan University (Phitsanulok, Thailand) participated in the study. Subjects were positioned by Frankfurt horizontal plane paralleled to the horizontal plane and asked to bilaterally clenched in MIP. Patient’s perception was evaluated by asking which side of the jaw had heavier bite force (right, left, or equally on both sides). Then, the clinician subjective interpretation was assessed using traditional occlusal indicators. Furthermore, patient’s bite force was analyzed using T-Scan III.
Statistical Analysis Cohen’s weighted kappa test was used to evaluate the correlation of bite force.
Results The best correlation between patient’s perception and T-Scan III was at the ± 7.5% cutoff range with 15 subject agreements. While the best correlation between clinician subjective interpretation and T-Scan III was at ± 5.0% cutoff range with 23 subject agreements. Cohen’s weighted kappa indicated slight agreement between T-Scan III and patient’s perception and fair agreement between T-Scan III and clinician.
Conclusions Clinician subjective interpretation is more clinically reliable than patient’s perception when T-Scan III is used as a gold standard.
Stroke Complicating Acute ST Elevation Myocardial Infarction—Current Concepts
Authors: Bhandari Monika , Vishwakarma Pravesh , Sethi Rishi , Pradhan Akshyaya 
Published: September 2019

AbstractMyocardial infarction (MI) is one of the leading causes of mortality today both in developed and developing countries alike. Advancement in the pharmacotherapy and revascularization techniques has resulted in drastic improvement in survival. Most of the complications of MI can be managed adequately resulting in reduced mortality from MI in the recent years. However, mortality from stroke following acute MI remains high even today. Here, we discuss the incidence, risk factors, and management of stroke following acute ST elevation MI.
Role of Serum Lactate Dehydrogenase in Isolated Head Injury
Authors: Bhardwaj Mohit , Arora Bhavinder 
Published: September 2019

AbstractIn recent years, some encouraging reports have appeared on assessing the degree of brain damage by estimating serum and cerebrospinal fluid enzymes such as lactate dehydrogenase (LDH). In our study, we included 100 patients with isolated head injury arriving at trauma center, PGIMS Rohtak within 24 hours of injury, studied levels of serum LDH on days 1, 3, and 7 of injury, and concluded that levels have diagnostic as well as prognostic significance.
Acute Phase Effect of Memantine Hydrochloride in Experimental Peripheral Nerve Injury
Authors: AK Hakan , Daltaban Iskender Samet , Vural Sevilay 
Published: September 2019

Abstract
Aim In this experimental study, we aimed to investigate possible healing effects of memantine hydrochloride, an N-methyl-d-aspartate (NMDA) antagonist, with clinical, biochemical, and histopathologic methods on acute peripheral nerve injury (PNI).
Material and Method Forty-eight adult Wistar albino rats were divided into four groups (n = 12). The groups were arranged as sham-operated group (group 1), acute compression model group (group 2), trauma + low-dose memantine group (group 3), and trauma + high-dose memantine group (group 4). Memantine was administered intraperitoneally for 7 days. Subjects were sacrificed after the measurement of the sciatic nerve function index (SNFI) on the eighth day. Cyclooxygenase 2 (COX-2) and tumor necrosis factor-α (TNF-α) levels were measured in nerve tissues. Histopathologic evaluation was performed by electron microscopy.
Results The mean sciatic function index (SFI) scores of groups 1 to 4 were +3.27 (standard deviation [SD] ±4.66),–18.2 (SD = ±11.7),–8.5 (SD = ±7.5), and–2.5 (SD = ±9), respectively. The mean COX-2 values were 0.98 ng/mL (SD = ±0.51), 1.89 ng/mL (SD = ±0.22), 1.39 ng/mL (SD = ±0.36), and 1.35 ng/mL (SD = ±0.59), respectively. TNF-α values were 0.09 pg/mL (SD = ±0.23), 1 pg/mL (SD = ±0.96), 0.46 pg/mL (SD = ±0.55), and 0.48 pg/mL (SD = ±0.78), respectively. Group 1 showed normal histologic findings. Group 2 showed marked edema particularly in large-diameter myelins. Myelin configurations were detected in large myelinated axons in group 3. The number of mast cells in endoneurium was high in group 4.
Conclusion The efficacy of memantine in the acute phase of PNI appears to be significant according to the SNFI and biochemical tests. However, histologic findings suggest that high doses of memantine have a negative effect on PNI.
Variability of upper body kinematics in a highly constrained task – sprint swimming
Authors: Sanders Ross H. , Button Chris , McCabe Carla B. 
Published: September 2019

AbstractBefore examining the effect of changing constraints on skill adaptation, it is useful to know the tolerable variability of a movement pattern for optimal performance. Tolerable variability may vary throughout the period of task performance as some parts of the movement pattern may be more important than others. The purpose of this study was to quantify the inter‐trial variability of performance variables, and hand path as the task‐relevant parameter, of skilled front crawl swimmers during 25 m sprints. It was hypothesised that the wrist paths would have smaller inter‐trial variability during the below water phase than during the above water phase. Twelve skilled swimmers performed four 25 m front crawl sprints which were recorded by six phased locked video cameras for three‐dimensional analysis. Standard deviations and time series repeatability (R 2) of the right and left wrist displacement were determined. On average, swimmers varied their sprint speed between trials by <1.5%. The spatio‐temporal patterns of wrist paths varied by <3 cm in all directions (horizontal, vertical & lateral). There was no significant difference in inter‐trial variability between above and below water phases. Swimmers increased wrist path consistency at the critical events of water entry in the horizontal and lateral directions and at exit for the horizontal direction. This study established levels of variability in spatio‐temporal movement patterns of the paths of the wrist in sprint swimming and provided evidence that swimmers minimise variability for key events, in this case, the position of the wrists at water entry and exit.
Methods for Derivation of Density Matrix of Arbitrary Multi-Mode Gaussian States from Its Phase Space Representation*
Authors: Zhang Sheng-Li , Yang Song 
Published: September 2019

Abstract

We present a method for derivation of the density matrix of an arbitrary multi-mode continuous variable Gaussian entangled state from its phase space representation. An explicit computer algorithm is given to reconstruct the density matrix from Gaussian covariance matrix and quadrature average values. As an example, we apply our method to the derivation of three-mode symmetric continuous variable entangled state. Our method can be used to analyze the entanglement and correlation in continuous variable quantum network with multi-mode quantum entanglement states.
Experimental Realization of Degenerate Fermi Gases of 87Sr Atoms with 10 or Two Spin Components*
Authors: Qi Wei , Liang Ming-Cheng , Zhang Han , Wei Yu-Dong , Wang Wen-Wei , Wang Xu-Jie , Zhang Xibo 
Published: September 2019

Abstract

We report the experimental realization of quantum degenerate Fermi gases of 87Sr atoms under controlled 10- and dual-nuclear-spin configurations. Based on laser cooling and evaporative cooling, we achieve an ultracold Fermi gas of 105 atoms equally distributed over 10 spin states, with a temperature of T/TF=0.21. We further prepare a dual-spin gas by optically pumping atoms to the mF=9/2 and mF=7/2 states and observe a slightly lower T/TF than that for a 10-spin gas under the same trapping condition, showing efficient evaporative cooling under a decreasing number

N

of spin states (

N
≥
2

) despite the increasing importance of Pauli exclusion. Given that rethermalization becomes less efficient with

N

approaching unity, we evaporatively cool an almost polarized gas to 130 nK. The simple and efficient preparation of ultracold Fermi gases of 87Sr with tunable spin configurations provides a first step towards engineering topological quantum systems.
Numerical analysis of the transient heat transfer in high temperature chamber furnaces
Authors: Krumov K S , Penkova N Y 
Published: September 2019

Abstract
An algorithm for numerical analysis of the transient thermal processes in high temperature gas chamber furnaces for ceramic firing is developed. It is based on mathematical models of the conjugate heat transfer, including combustion, turbulent flows of the torch and gas mixtures, heat transfer through radiation, conduction and convection. The algorithm is used for analysis and improvement of the efficiency of a furnace for firing of technical ceramics.
Thermal - fluidics behaviour of water mist and gas fuel flame jets based on experimental results
Authors: Pavel D , Chisacof A , Dimitriu S , Cozma P 
Published: September 2019

Abstract
The main objective of the present paper is to provide a visual investigation of the fire and water mist interference during the extinguish process. This kind of the experimental study for these processes is imposed by the phenomena complexity. The experimental study provides us the information of real behaviour of jets assembly in operation. On this way the physical theoretical model may by better conceived. The main test was focused on the concave shape of ceiling, which gives the better suppression of the flame. From the heat balance, of the studied case, the extinguish efficiency is obtained, the values being around 20%. From these values result that a lot of working agent is lost. That loss is related to the finest of the droplets in the liquid jet. The experimental tests give us the optimal angles between the two jets in aim to realise an efficient extinguish operation.
Design analysis of low pressure distillation column for cryogenic air separation
Authors: Pintilie M , Șerban A , Popa V , Popa C L 
Published: September 2019

Abstract
Cryogenic air separation units are widely used in industry, which consume a large energy and need to produce a huge amount of need of nitrogen, oxygen and argon products with high purity. High purity distillation columns are critical unit operations in cryogenic air separation plants. In this paper the low pressure distillation column is investigated by using a steady state model. The first principles mathematic model of the column is firstly developed, and the pressure, temperature and static liquid nitrogen, oxygen and argon concentrations in the upper column are presented. The obtained results give important information on the variation of temperature, pressure, component concentrations and molar flows within the distillation column. The study highlighted the importance of considering air as ternary mixture. The separation process performance is significantly influenced by the location of side draw of argon and reflux ratio at the top of the column
A review of new technologies in valve systems of internal combustion engines and their effects
Authors: Akal D , Akyol U , Uzuneanu K 
Published: September 2019

Abstract
Efficient use of energy is becoming increasingly crucial due to global warming and depleting fossil fuel sources. Automotive manufacturers aim for fuel economy, reduction of exhaust emissions, durability, volume and weight reduction, and power and torque increase in internal combustion engines. One of the most important developments in this field is the new technologies in classic valve systems. There are still ongoing studies in this field as the gas exchange processes affects all engine parameters. In this review; the principles of new technologies used on classic valve systems and their effects on engines have been investigated. The research has shown; new mechanism technologies used on valve systems have positive effects on engine performance, power, torque and fuel consumption.
About Structural and Thermal Analysis of Diesel Engine Piston Using Ansys Software
Authors: Frătița M , Popescu F , Uzuneanu K , Ion I V , Angheluță C M 
Published: September 2019

Abstract
The main role of the piston is to vary the dimensions of the combustion chamber in internal combustion engine. The piston is in contact with the hot gases resulting from combustion. In addition to thermal stresses, depending on the operating mode of the engine, the piston is required to alternate the inertial force. Therefore, the steel piston undergoes due to high inertial forces, and lightweight aluminium pistons cannot operate at high temperatures. In order to combine the advantages of the two types of materials it has been chosen the constructive design of the bimetal pistons. This paper aims to compare the performances of steel pistons and bimetal pistons using the Ansys software.
Analysis of the terrain specifics and roughness factor on the wind shear over complex terrains
Authors: Terziev A K 
Published: September 2019

Abstract
Wind power production depends mainly on the distribution of wind speed over the terrain. Wind behaviour is a function of terrain features, the roughness of the terrain - the complexity of the relief (the presence of mountain ranges, hills or valleys) and the presence of natural or artificial obstructions along the wind’s path (shrubs, trees, small and large buildings). In order to assess the factors influencing the distribution of the wind shear, long-term measurements with high meteorological masts installed on complex terrain were carried out. The masts are equipped with calibrated equipment to measure wind parameters. A numerical solution has been carried out with specialized software, which also supplied information about the velocity field on the site. A comparison was made between the results of the numerical solution and the experimental ones. An adjustment was proposed to change the initial conditions in order to refine the results of numerical solutions.
Correlations between kinetic and thermodynamic parameters of the extraction of tobacco leaves
Authors: Tasheva S , Gandova V , Popova V , Ivanova T , Damyanova S , Stoyanova A 
Published: September 2019

AbstractThe correlations between thermodynamic and kinetic parameters in the extraction of tobacco leaves (solid – liquid system) were determined. The values of the parameters internal molecular diffusion coefficient, activation energy and entropy were used in the calculation procedure presented in the study, with regard to the extraction process of leaves of three types of tobacco (Virginia, Burley and Oriental), carried out with 50% ethanol as a solvent at different temperatures (20, 30, 40, 50, 60 and 70°C) and duration (10, 20, 30, 40, 50 and 60 min). On the basis of the Arrhenius law the effective diffusion coefficient in solid – liquid system and the reaction rate constant of the three types of tobacco were computed.
Numerical analysis of the influence of the lower hull angle of a round skirtless air cushion vehicle
Authors: Pavăl M S , Popescu A , Zahariea D 
Published: September 2019

Abstract
Ever since 1716, when the first concept of building a vehicle to operate with an air cushion was presented, the world remained fascinated by this concept. This article presents a study on important parameters of the flow into the inner cavity of a simple plenum hull, the first configuration of the air cushion vehicle. In order to achieve this, six constructive models were chosen, the only major difference being the angle of inclination at the bottom of the hull. The paper presents the specific mathematical model adapted for this type of configuration, the imposed constructive dimensions, the steps of numerical analysis and results. An important step of this analysis is the estimation of the total weight of each prototype according to the lower hull angle. The estimate was performed using Catia software and the actual analysis was completed using Matlab.
Trifold PV-T-TEG (photovoltaic-thermal-thermoelectric generators) panel characterization overview
Authors: Lupu A G , Panaite C E , Homutescu V M , Balanescu D T , Popescu A 
Published: September 2019

Abstract
The anticipated depletion of conventional fuels (crude oil, coal) reserves as energy sources triggered extended researches for renewable energy sources. In the last few decades, technologies for energy conversion from solar to electric and thermal energy evolved rapidly. Some recent photovoltaic (PV) panel cooling methods involve thermoelectric (TE) elements. The authors proposed a trifold panel that employs both thermal (T) and TE cooling to lower the temperature of PV panel operation and extract energy from waste heat. Recently, an important number of publications tackled various aspects of PV-TE and PV-T-TE hybrid systems, especially for building integration applications. This paper attempts to cover important topics, with emphasis on aspects related to design and characterization of mobile applications.
Generating structural, interactional and processual order through synergetic entanglement is the essence for understanding and using Quantum Biological Thermodynamics with Finite Speed of the Cardio-Pulmonary System
Authors: Petrescu S , Costea M , Petrescu V , Bolohan R , Borcila B , Feidt M 
Published: September 2019

Abstract
Recently, we invented a new branch of irreversible processes by studying the interaction between Heart and Lungs through thousands of measurements of the heart frequency, lung frequency and oxygen content in the blood for many people of different age. Based on these measurements we discovered a surprisingly simple but powerful formula correlating the two frequencies in any stationary state through a quantum number N, that has an integer value for healthy people, but non integer for ill persons. Actually, the formula states that the interaction between Heart and Lungs, considered as two macroscopic oscillators, is quantized, which means that it is very much ordered or highly organized. We believe that this discovery has no connection with Quantum Mechanics, that describes the behavior of microscopic systems. Thus, the aim of the paper is to explain and understand why the quantization of the Cardio-Pulmonary Interaction occurs in macroscopic biological system. We present two diagrams invented by us for describing the quantized stationary states and processes with or without quantum jump between different stationary states depending on person activity. Based on the above mentioned formula and these diagrams, we show that our discovery is in accordance with the new branch of science, Synergetics.
Investigation of the effect of drying air temperature on drying time by numerical method for textile bobbins
Authors: Akyol U , Karakoca A , Shaliyev R , Akal D , Uzuneanu K 
Published: September 2019

Abstract
Drying of the yarn bobbins in the textile sector is a very important stage among the textile finishing processes. Because this process takes a lot of time and causes a large amount of energy consumption. In this study, drying times for different drying air inlet temperatures at a constant drying air pressure were determined with the help of mathematical model for textile bobbin drying process. Finite difference method was used in mathematical model solution and the effect of different space and time steps were taken into consideration during the solution.