bluuebunny/crossref_metadata_2025_split huggingface dataset:
Assessing the viability of three Lactobacillus bacterial species protected in the cryoprotectants containing whey and maltodextrin during freeze-drying process
Authors: Majidzadeh Heravi R. , Ghiasvand M. , Rezaei E. , Kargar F. 
Published: December 2021

AbstractFreeze-drying of bacteria associates with different stresses such as osmotic pressure, temperature and oxidation, and decreases bacterial viability, which seem to reduce by applying cryoprotectants. The present study evaluated the effect of four cryoprotectants on decreasing the stress caused by freeze-drying process among three Lactobacillus species. Additionally, it highlighted the use of whey and maltodextrin as a substitute for peptone and sucrose in cryoprotectants respectively. The viability of lactobacilli was measured after freeze-drying, 1 month of storage at 25 and 4°C. Based on the results, the viability rate of bacteria in protectants during freeze-drying stage was dependent on their strains. The best viability of Lacticaseibacillus rhamnosus GG and Ligilactobacillus salivarius 20687 was, respectively, observed in the protectants containing sucrose and whey, while Lactiplantibacillus plantarum NRRL B-14768 viability was equal in all protectants. The number of live bacteria reduced significantly by storing bacteria for 1 month at 25°C compared to the 4°C storage. During the storage period, the viability of L. salivarius improved by adding sucrose in protectant. Due to the positive effect of whey and sucrose in the drying and storage stage, on bacterial viability, the protectant consisting of whey and sucrose is suggested for all of the species under study.
A nation‐wide study on the common reasons for infant formula supplementation among healthy, term, breastfed infants in US hospitals
Authors: Bookhart Larelle H. , Anstey Erica H. , Kramer Michael R. , Perrine Cria G. , Reis‐Reilly Harumi , Ramakrishnan Usha , Young Melissa F. 
Published: December 2021

AbstractIn‐hospital infant formula supplementation of breastfed infants reduces breastfeeding duration, yet little is known about common reasons for infant formula supplementation. We examined the three most common reasons for in‐hospital infant formula supplementation of healthy, term, breastfed infants in the US reported by hospital staff. Hospital data were obtained from the 2018 Maternity Practices in Infant Nutrition and Care survey (n = 2045), which is completed by hospital staff. An open‐ended question on the top three reasons for in‐hospital infant formula supplementation was analyzed using thematic qualitative analysis and the frequencies for each reason were reported. The top three most common reasons for in‐hospital infant formula supplementation reported by hospital staff included medical indications (70.0%); maternal request/preference/feelings (55.9%); lactation management‐related issues (51.3%); physical but non‐medically indicated reasons (36.1%); social influences (18.8%); perceived cultural/societal/demographic factors (8.2%) and medical staff/institutional practices (4.7%). These findings suggest that a variety of factors should be considered to address unnecessary infant formula supplementation. Lactation management support delivered in a timely and culturally sensitive manner and targeted to mother‐infant dyads with potential medical and physical indications may reduce unnecessary in‐hospital infant formula supplementation.
Occipitocervical Revision Surgery Using the Bicortical Screw and Plate System for Failed Craniovertebral Junction Stabilization
Authors: Sun Yan , Yang Feng , Ma Hao‐ning , Gong Long , Wang Yan‐lei , Song Ji‐peng , Hao Qing‐ying , Tan Ming‐sheng 
Published: December 2021

BackgroundTo evaluate the clinical efficacy and safety of the modified technique utilizing the occipital bicortical screws and plate system in occipitocervical revision surgery.MethodsBetween October 2010 and May 2018, 12 consecutive patients were retrospectively evaluated. All patients had posterior occipitocervical resurgery utilizing modified technique of bicortical screws and occipital plate. The measurements of extracranial occiput on midline were conducted on computed tomography (CT) scans. The thickness of the occipital bone at the location of external occipital protuberance and below 15 mm were evaluated, respectively. For the procedure, the trajectory was drilled perpendicular to the external occipital protuberance for the specified depth with a depth‐limited drilling, 2 mm away from the internal bone plate, then the trajectory was deepened at intervals of 1 mm each time until reaching the internal bone plate. Meanwhile, a probe was used to explore all the walls of the trajectory. Bicortical screws were inserted to the occipital plate and the depth of penetration was less than 2 mm from the internal bone plate. Clinical efficacy and radiographic evaluation were followed up.ResultsThe thickest point was the external occipital protuberance, which was 15.49 ± 1.47 mm and decreased gradually on the midline to 13.41 ± 1.60 mm at below 15 mm. Twelve cases (mean age 41.17 years; range, 24–62 years), including five males and seven females, were followed up for 24.08 months (14–32 months). The interval time was 40.42 months (3–156 months) after the initial operation. At the final follow‐up, JOA score increased from 8.58 ± 2.53 before surgery to 12.67 ± 1.84 (P < 0.05) and VAS score improved from 6.17 ± 1.21 to 2.08 ± 1.32 (P < 0.05). Besides, clinical symptoms were relieved in all patients after revision surgery. All patients had rigid internal fixations with bone fusion and no major complications occurred.ConclusionsPosterior occipitocervical plate‐screw system with bicortical screws had the advantages of safety, simple and promising efficacy without excessive tissue release or intraspinal manipulation, proving that it's valuable as a modified technique for occipitocervical revision surgery.
Quantitative trait loci analysis for flower‐related traits in almond (Prunus dulcis)
Authors: Paizila Aibibula , Karcı Harun , Ziya Motalebipour Elmira , Güney Murat , Kafkas Salih 
Published: December 2021

AbstractAlmond is one of the most important nut crops in Turkey. Simple sequence repeat (SSR)‐based linkage maps are very reliable in constructing linkage maps due to the co‐dominant and highly reproducible nature of the SSR markers. The objective of this study was to construct well‐saturated, SSR‐based genetic linkage maps using ‘Gulcan‐2 × Lauranne’ and ‘Guara × Nurlu’ F1 populations and to identify QTLs related to the flower colour, stigma–anther position and full blooming date in almond. A total of 275 SSR primer pairs selected from the previous studies of various Prunus species were tested in both populations. A total of 175 SSR loci segregated in ‘Gulcan‐2 × Lauranne’ population and 162 SSR loci were mapped into eight linkage groups. The total map length was 514.6 cM, with an average marker density of 3.2 cM. In ‘Guara × Nurlu’ population, 159 markers segregated, and 153 SSR loci were mapped. The total map length was 493.9 cM with an average marker distance of 3.2 cM. Five and four major QTLs were detected in ‘Gulcan‐2 × Lauranne’ and ‘Guara × Nurlu’ populations, respectively. The linkage maps constructed in this study can be used in QTL analysis of important phenotypic traits in almond, whereas identified QTL regions and closely related markers can be used for marker assisted selection in future almond breeding programmes.
Effects of post‐response arousal on cognitive control: Adaptive or maladaptive?
Authors: Compton Rebecca J. , Jaskir Marc , Mu Jianing 
Published: December 2021

AbstractThis study investigated whether detection of a performance mistake is followed by adaptive or detrimental effects on subsequent attention and performance. Using a Stroop task with spatial cueing, along with simultaneous EEG and pupillary measurements, we examined evidence bearing on two alternative hypotheses: maladaptive arousal and adaptive control. Error detection, indexed by the error‐related negativity ERP component, was followed by pupil dilation and suppression of EEG oscillations in the alpha band, two indices of arousal that were associated with one another on a trial‐by‐trial basis. On the trials following errors, there was neural evidence of enhanced spatial cueing, manifested in greater hemispheric activation contralateral to the cued visual field. However, this post‐error enhancement was not followed by changes in Stroop or spatial cueing effects in performance, nor by increased attentional cueing effects in ERP responses to targets. Rather, performance tended to be slower and less accurate following errors compared to correct trials, and higher post‐response arousal, indexed by larger pupils, predicted next‐trial slowing and decreased P2 amplitude to targets. Results favor the maladaptive arousal account of post‐error cognitive control and offer only limited support for adaptive control.
Parenting, young children's behavioral self‐regulation and the quality of their peer relationships
Authors: Ringoot Ank P. , Jansen Pauline W. , Kok Rianne , van IJzendoorn Marinus H. , Verlinden Marina , Verhulst Frank C. , Bakermans‐Kranenburg Marian , Tiemeier Henning 
Published: December 2021

AbstractThe quality of young children's peer relationships is important for their development, and it is assumed that parenting and self‐regulation skills shape children's behavior when interacting with peers. In this multi‐informant‐multi‐method study, we examined the direct and mediated associations between preschool parenting, children's behavioral self‐regulation, and peer aggression and peer relationship problems in elementary school‐aged children and extended previous work by examining both positive and negative parenting of both mothers and fathers. In a large community sample (n = 698) of parents and children who were between 1 and 6 years old, we obtained information on observed maternal sensitivity, mother‐ and father‐reported harsh discipline, observed child self‐regulation, and child‐reported aggression towards peers, peer rejection and victimization. Results from a structural equation model showed that maternal sensitivity was prospectively associated with children's behavioral self‐regulation and that lower levels of behavioral self‐regulation were associated with higher levels of children's peer aggression and peer relationship problems. However, children's behavioral self‐regulation did not mediate the association between maternal sensitivity and peer relationship problems. In addition, higher levels of paternal, but not maternal, harsh discipline were directly associated with more peer relationship problems, but again no mediation was found. The results highlight the importance of maternal sensitivity for children's behavioral self‐regulation and the role of paternal harsh discipline for the quality of children's later peer relationships. Our findings suggest it is important to take maternal and paternal parenting practices into account as they might have different effects on the child.
Improved Prediction of Losses With Large Eddy Simulation in a Low-Pressure Turbine
Authors: Miki Kenji , Ameri Ali 
Published: December 2021

Abstract
There is a need to improve predictions of losses resulting from large eddy simulations (LES) of low-pressure turbines (LPT) in gas turbines. This may be done by assessing the accuracy of predictions against validation data and understanding the source of any inaccuracies. LES is a promising approach for capturing the laminar/turbulent transition process in a LPT. In previous studies, the authors utilized LES to model the flow field over a variable speed power turbine (VSPT) blade and successfully captured characteristic features of separation/reattachment and transition on the suction side at both the cruise (positive incidence) and takeoff conditions (negative incidence) and as well, simulated the effect of freestream turbulence (FST) on those phenomena. The predicted pressure loading profiles agreed well with the experimental data for both a high and a low-FST case at a Reynolds number of Reex = 220,000. In this paper, we present wake profiles resulting from computations for a range of FST values. Although the predicted wake profiles for the lowest FST case (Tu = 0.5%) matched the experimental data, at higher FST (Tu = 10–15%), the wake was wider than the experimentally measured wake and for both cases were displaced laterally when compared with the experimental measurements. In our investigation of the causes of the said discrepancies, we have identified important effects which could strongly influence the predicted wake profile. Predicted losses were improved by assuring the validity of the flow solution. This was done by utilizing spectral analysis to scrutinize the dynamic behavior of the wake and determine solution accuracy resulting from low mesh density and low accuracy of convective modeling.
Numerical Simulation of Wave Interaction With a Pair of Fixed Large Tandem Cylinders Subjected to Regular, Non-Breaking Waves
Authors: Mohseni M. , Guedes Soares C. 
Published: December 2021

Abstract
This paper presents the application of a two-phase computational fluid dynamics (CFD) model to carry out a detailed investigation of the nonlinear wave field surrounding a pair of columns placed in the tandem arrangement in the direction of wave propagation and corresponding harmonics. The numerical analysis is conducted using the unsteady Reynolds-averaged-Navier-Stokes/volume of fluid (VOF) model based on the openfoam framework combined with the olaFlow toolbox for wave generation and absorption. For the simulations, the truncated cylinders are assumed vertical and surface piercing with a circular cross section subjected to regular, non-breaking fifth-order Stokes waves propagating with moderate steepness in deep water. Primarily, the numerical model is validated with experimental data for a single cylinder. Future, the given simulations are conducted for different center-to-center distances between the tandem large cylinders. The results show the evolution of a strong wave diffraction pattern, and consequently, high wave amplification harmonics around cylinders are apparent.
Assessment of Stress Concentration Factors of Dented Rigid Risers Under Fatigue Loadings
Authors: Santander Elvis Jhoarsy Osorio , de Carvalho Pinheiro Bianca , Magluta Carlos , Roitman Ney 
Published: December 2021

Abstract
In the development of oil and gas fields, subsea pipes are used in various applications, like pipelines and risers. During operation, risers can be subjected to accidents, such as collisions with other risers, anchors, rocks, or any heavy equipment or objects, which may lead to mechanical damages. These mechanical damages are commonly characterized as dents. The objective of this work is to study the effect of the introduction of plain dents on the fatigue life of rigid risers under fully reversed bending with the conduction of resonant bending tests. A three-dimensional finite element model was developed to estimate the stress concentration on dented risers under bending. Numerical simulations and experimental tests were carried out to evaluate the resulting stress concentration factors (SCFs). These SCFs can be used in the prediction of the remaining fatigue life of dented rigid risers.
Texture Optimization and Verification for the Thrust Bearing Used in Rotary Compressors Based on a Transient Tribo-Dynamics Model
Authors: Lyu Bugao , Jing Lilong , Meng Xianghui , Liu Ruichao 
Published: December 2021

Abstract
Rotary compressors are designed more and more compact, and the compressor cylinder’s ambient pressure is designed very high to facilitate oil separation and improve efficiency. However, these designs cause the working condition of the thrust bearing becoming harsher, and severe wear may occur. The present study is aimed at mitigating its wear condition through surface texturing. Based on a transient tribo-dynamics model considering the coupling effect of the journal and thrust bearings, a texture optimization study for the thrust bearing is conducted, in which three different stochastic optimization algorithms are utilized. The results show that thrust bearings with optimized textures have significantly reduced contact forces and wear under a high working frequency due to an extra hydrodynamic support around the texture dimples. The optimized texture designs are fabricated on the thrust bearing surfaces by a high-accurate picosecond laser machine, and their performance is assessed through experiments using a compressor performance test platform. The experiment results confirm that the textured thrust bearing has a lower wear depth. Moreover, the coefficient of performance (COP) of the testing compressor with textured thrust bearing is increased while its input power decreases, which implies a reduced friction force and a higher energy efficiency.
Vibration Analysis of Deep Groove Ball Bearing Using Finite Element Analysis and Dimension Analysis
Authors: Salunkhe V. G. , Desavale R. G. , Kumbhar Surajkumar G. 
Published: December 2021

Abstract
Condition monitoring of rotor dynamic is recognized as an advanced preventative maintenance technique for fault-free operation. Faulty bearings in rotating machines may cause severe problems and even untimely breakdowns. This work demonstrates the power of the finite element analysis (FEA) model and dimension analysis technique (DAT) to analyze the effect of the depth and slope angle of surface faults on the bearing contact characteristic. Experimentation is performed to investigate the vibration characteristics of ball bearings. The FEA, DAT, and experimentation show that vibration amplitude is a vital function of surface fault size. The current approach of FEA with DAT reflects their reliability and accuracy for the diagnosis of rotor systems. The present method was found effective in predicting vibration amplitude and defect frequency within acceptable error.
Natural Frequency and Resonance Study of FGM Turbo-Machinery Blade Using Campbell Diagram
Authors: Das Apurba , Pal Subhendu , Ziyi Su , Rout Mrutyunjay , Inaba Kazuaki , Karmakar Amit 
Published: December 2021

Abstract
Turbo machinery rotating blades are a vital component of aero-engines for transferring the energy of gas flow to kinetic energy. Rotating turbo-machinery blades are prone to fail under working fields with high temperature, high speed, high pressure and resonance of blades with prime engine. Vibration of the turbo-machinery blades need to be studied carefully for safe and reliable operation of the engine. Thermal barrier coatings (TBC) layers are used to protect the blade metal at higher operating temperature though these can be plagued due to phase instability, thermal instability and adherence problems. TBCs also tend to spall due to thermal expansion mismatch with the super alloy substrate or because of erosion/impact caused by particles in the high-velocity combustion gases. Functionally graded materials (FGMs) are a relatively new class of materials that can solve these problems in high-temperature environments and can be considered as potential material for making gas turbine blades. Unlike composite materials the functionally graded materials (FGMs) are free from delamination and debonding and have the ability to withstand high temperature without TBC coatings. In this present study natural frequency of the FGM turbine blade for various rotational speeds during actual operation is determined using finite element technique. As the aero-engine is complex in nature therefore harmonic resonance can always occur in the aero-engine system and it is difficult to determine the natural frequency at varying speed during actual operation. The chances of failure of the blade also increase because of harmonic resonance. Hence, the resonance property is required to investigate of the FGM blade in details. Various rotational speed and operating temperature is considered to determine the natural frequencies of the blade. The resonance studies for each case are performed using the Campbell diagram. Resonance margin is calculated for each case and safe operating speed is determined. This study could serve as ready reference for safe operation of turbo-machinery engine considering FGM blade for specific range of engine speed.
Life Augmentation of Turbine Exhaust System Compensators Through Integrated MADM Optimization Approach of Stress Based Fatigue Cycles
Authors: Pagar Nitin D. , Patil Amit R. 
Published: December 2021

Abstract
Exhaust expansion joints, also known as compensators, are found in a variety of applications such as gas turbine exhaust pipes, generators, marine propulsion systems, OEM engines, power units, and auxiliary equipment. The motion compensators employed must have accomplished the maximum expansion-contraction cycle life while imposing the least amount of stress. Discrepancies in the selecting of bellows expansion joint design parameters are corrected by evaluating stress-based fatigue life, which is challenging owing to the complicated form of convolutions. Meridional and circumferential convolution stress equations that influencing fatigue cycles are evaluated and verified with FEA. Fractional factorial Taguchi L25 matrix is used for finding the optimal configurations. The discrete design parameters for the selection of the suitable configuration of the compensators are analysed with the help of the MADM decision making techniques. The multi-response optimization methods GRA, AHP, and TOPSIS are used to determine the parametric selection on a priority basis. It is seen that weighing distribution among the responses plays an important role in these methods and GRA method integrated with principal components shows best optimal configurations. Multiple regression technique applied to these methods also shows that PCA-GRA gives better alternate solutions for the designer unlike the AHP and TOPSIS method. However, higher ranked Taguchi run obtained in these methods may enhance the suitable selection of different design configurations. Obtained PCA-GRG values by Taguchi, Regression and DOE are well matched and verified for the all alternate solutions. Further, it also shows that stress based fatigue cycles obtained in this analysis for the L25 run indicates the range varying from 1.13 × 104 cycles to 9.08 × 105 cycles, which is within 106 cycles. This work will assist the design engineer for selecting the discrete parameters of stiff compensators utilized in power plant thermal appliances.