bluuebunny/crossref_metadata_2025_split huggingface dataset:
Development of an AMPCP Condition Indicator
Authors: Sheldon John W. , MacDonald Justin , Noble Evan , Chung Christine V. 
Published: August 2022

Abstract
All-metal progressing cavity pumps (AMPCPs) are frequently used in oil and gas applications to produce high-temperature fluids to surface. Unfortunately, due to the interaction of the metal rotor on the metal stator, AMPCPs can exhibit accelerated wear during operation that results in decreasing pump volumetric efficiency over the pump's life.
While decreasing pump volumetric efficiency can be a result of pump wear, it can also be due to changes in downhole operating conditions, such as increasing pump differential pressure or decreasing pump speed. For this reason, when evaluating the state or condition of an AMPCP, the use of pump efficiency alone may be a misleading or imperfect indicator.
In this work, a proposed condition indicator is presented that estimates the wear experienced by an AMPCP at any given time in operation and takes into consideration the potential effects of downhole operating conditions. The proposed condition indicator can also be extrapolated into the future and used to estimate the potential remaining useful life (RUL) of an AMPCP by considering the current pump condition and the estimated future downhole operating conditions.
An example is provided to demonstrate how to calculate the condition indicator of an AMPCP and several case studies are presented that illustrate the effects of varying downhole operating conditions and various workover activities, such as rotor re-landing and rotor swaps, on the condition of an AMPCP and its potential RUL.
The proposed AMPCP condition indicator enables operators to estimate the condition of an AMPCP over time, which allows for better pump selection based on the anticipated operating decisions, better operating practices to maximize system performance, as well as improved planning of upcoming workovers based on more accurate AMPCP RUL estimates.
Analytical solution of the steady Navier-Stokes equation for an incompressible fluid entrained by a rotating disk of finite radius using the apparatus of tunnel mathematics.
Authors: G. Shvydkyi O. 
Published: August 2022

Abstract
The flow in the neighborhood of a rotating disk is of great practical importance particularly in connexion with rotary machines. It becomes turbulent at larger Reynolds numbers, R > 3 x 105, in the same way as the flow about a plate. In this article we consider o motion of incompressible fluid that is always turbulent in circular direction (Reynolds number based on circular velocity R > 3 x 105) and is of both of kinds in radial direction, i e. laminar (Reynolds number based on radial velocity Rr < 3 x 105) and turbulent ( Rr > 3 x 105). The equations of analyticity of functions of spatial complex variable (shortly, the equations of tunnel mathematics) affords a possibility to seek the solutions of steady Navier-Stokes equation in view of elementary functions. All vector fields, including those obeying the Navier-Stokes equation, satisfy to the equations of tunnel mathematics. The Navier-Stokes equations themselves are afterwards applied for verification of obtained solutions and calculation the pressure. Obtained formulae for pressure allow to visualize the presence of the boundary layer and estimate its thickness for laminar and turbulent flows. We use the Prandtl`s concept of considering of fluids with small viscosities, i. e. we suppose that Reynolds number is enough large and the viscosity has in important effect on the motion of fluid only in a very small region near the disk (boundary layer). We also suppose that the fluid and the disk had at beginning the same temperatures and the energy dissipation occurs only by means internal friction.
A gamified morning report curriculum to improve internal medicine trainee engagement, content exposure, and perceived learning efficacy
Authors: Peterson Jacob , Hensley Lauren 
Published: August 2022

Abstract
BackgroundThe daily morning report session for the Naval Medical Center Portsmouth Internal Medicine Residency Program uses the traditional format of case presentation and discussion. This commonly-used approach to morning report has relatively low learner attendance and perceived individual engagement and topics are derived from a limited pool of recently admitted cases. To improve engagement, material exposure, and perceived learning efficacy, we implemented a weekly competitive quiz session designed to review material presented previously.MethodsThe Friday morning report session was changed to a weekly quiz game, called “Follow-up Friday” with trainees forming small groups of 3-4 people from different levels of training. Using their smartphones and presentation software available from “Mentimeter.com,” learners engaged in a competitive quiz with questions derived from cases and material presented earlier in the week as well as older material that they had found challenging from prior quizzes and the in-service training exam. ResultsImplemented in July 2021, this session was delivered to over 150 trainees including medical students and trainees rotating through the internal medicine department. When surveyed, internal medicine trainees of all year-groups indicated a strong perception that the Follow-Up Friday session improved engagement, material exposure, and learning efficacy. DiscussionModifying the morning report format to include well-established educational concepts was simple to implement and very well received by learners. This study was limited by a small sample size and a design that included only subjective outcomes from the learners. ConclusionFollow-Up Friday employed time-spaced learning, recall practice, and interleaving of topics resulting in improved learner engagement, material exposure, and perceived learning efficacy. This simple and effective format warrants continued use and may be of benefit to other training programs.
The gametogenic cycle and spawning of the Short-Necked Clam, Paphia undulata Born, 1778 from Timsah Lake, Suez Canal, Egypt
Authors: Mahmoud Mostafa A. M. , Yassien Mohamed H. 
Published: August 2022

Abstract
Background
The Short-Necked Clam Paphia undulata is a marine edible bivalve consumed all over the world and locally in Egypt. In the past decade, its population declined across the Egyptian fisheries due to overexploitation and pollution. The gametogenic cycle and spawning studies of P. undulata were carried out during the period from January 2020 to December 2020 along Timsah Lake, Suez Canal, Egypt.
Results
Shell lengths of the collected clams ranged from 2.31 cm to 6.22 cm in males, 2.05 cm to 5.97 cm in females and 3.70 cm to 4.36 cm in hermaphrodite clams. These clams are functionally dioecious wherein male and female sexes are separate, with very low incidences of hermaphroditism. The sex ratio (male: female: hermaphrodite) of the clam population was 1.0: 1.07: 0.04. The onset of sexual maturity of both males and females was 2.3 cm and 2.7 cm respectively.
Conclusions
Reproductive studies revealed that this species has a prolonged spawning season not restricted during a certain period.
Comparison of Autonomous sensory meridian response and binaural auditory beats effects on stress reduction: A randomized double-blind trial
Authors: Lee Minji , Lee Hyuk Joo , Ahn Junseok , Hong Jung Kyung , Yoon In-Young 
Published: August 2022

Abstract
This study aimed to compare the effects of Autonomous sensory meridian response (ASMR) and binaural beat (BB) on stress reduction, and to determine whether ASMR and BB can induce changes in quantitative electroencephalography (QEEG). A double-blind randomized trial was conducted. Subjects with stress were recruited considering their perceived stress scale (PSS), Beck depression inventory-II (BDI-II), insomnia severity index (ISI), and state-trait anxiety inventory-state anxiety (STAI-S) scores. Subjects listened to ASMR or BB with music (8Hz for daytime, 5Hz for nighttime) for 15 minutes in daytime and 30 minutes before going to sleep for 3 weeks. QEEG was measured before and after the intervention. Seventy-six participants (57 female, mean age = 46.12 ± 12.01) finished the trial. After the intervention, PSS, BDI-II, ISI, STAI-S, and PSQI scores improved significantly in both groups. BDI-II and ISI mean scores were normalized in both groups after the intervention. Changes of absolute beta and high beta power in the ASMR group were larger than those in the BB group (p = 0.026, p = 0.040, respectively). Both ASMR and BB are equally effective in reducing stress levels. Unlike BB, ASMR can lead to an increase in beta and high beta waves associated with cortical arousal.
High Variability of interaction energy between Volcanic Particles: Implications for Deposit Stability
Authors: Ontiveros Alfonso , Plaza Ivan , Calero Julio , Moleon Jose Alberto , Ibañez Jesus Miguel 
Published: August 2022

Abstract
Landslides on the flanks of stratovolcanoes can significantly modify the structure of the volcano. Macroscopic factors that determine the stability of volcanic deposits are well understood, but the microscopic interactions between particles and their impact on deposit cohesion remain poorly understood. Deposit cohesion is related to the energy of interaction between particles, and its calculation depends on the surficial properties of the eruptive materials. The purpose of this study was to perform a preliminary comparative analysis of the surficial properties of volcanic materials from various tectonic settings, including electrical (zeta potential) and thermodynamic (surface free energy) components and to calculate the total interaction energy between particles under different environmental conditions. We analyzed eruptive materials from six active volcanoes (El Hierro, Pico Do Fogo, Vulcano, Stromboli, Mt. Etna, and Deception Island). The results show that deposit cohesion varies among volcanoes, and changes drastically with the pH of the medium. Among the volcanic systems investigated, El Hierro (pH = 3) has the most cohesive materials, while Mt. Etna (pH = 8) has the least cohesive materials. Our results suggest that microscopic electrical and thermodynamic properties play a role in the stability of volcanic deposits, and confirm the need for a greater research focus in this area.
Fish Species Classification Using a Collaborative Technique Of Firefly Algorithm &amp; Neural Network
Authors: PRASENAN POOJA 
Published: August 2022

Abstract
Monitoring various Fish Species and its distribution of the species obtains a primary significance in receiving the insights to marine ecological-system. After this, visual classification of those species would aid in tracing out the movement and yields the patterns and trends in fish activities, which provides in depth knowledge of the species. Unconstrained under-water images pose highly variations because of the fish orientation changes, Light-intensities, similarity in fish patterns and fish shapes. This would create the greater challenge for Image-processing techniques in accurate classification of Fish species or the Fish classes. Hence, for this reason, Underwater Image Enhancement (UWIE) is implemented in combination of Morphological-operations in pre-processing method. The pre-processed image is then subjected to feature extraction process by using Speed-up Robust Feature (SURF) algorithm. This is followed by Firefly Algorithm (FFA), applied for optimization of Region of interest (ROI) selection in the selected-features. For the categorization of Fish-species, PatternNet is a technique which is employed, in classifying 10,000 marine fish-images to five categories (Dascyllus reticulatus, Plectroglyphidodondickii, Chromis chrysura, Amphiprionclarkii, and Chaetodon lunulatus). The Efficiency of the proposed-framework is performed in terms of Classification accuracy, execution time, precision value, F-measure and recall factors with respect to various categories of fish species. The comparison of the proposed-framework is also assessed with the other existing methods. 98% of accuracy rate in classification was produced by the evaluation results of the proposed framework with a lesser average computation time of 3.64 seconds upon different tested images. Thus, the higher efficiency of the proposed framework is proved by the outcomes of the study.
Transcriptomics of differences in thermal plasticity associated with selection for an exaggerated male sexual trait
Authors: Plesnar-Bielak Agata , Parrett Jonathan M. , Chmielewski Sebastian , Dudek Katarzyna , Łukasiewicz Aleksandra , Marszałek Marzena , Babik Wiesław , Konczal Mateusz 
Published: August 2022

Abstract

BackgroundThe information about the magnitude of between-individual differences in thermal plasticity and identification of the underlying molecular mechanisms are key to understand the evolution of thermal plasticity. In particular, genes underlying variation in the physiological response to temperature can provide raw material for selection acting on plastic traits. Using RNAseq, we investigate the transcriptional response to temperature in males and females from the bulb mite populations selected for the increased frequency of one of two discrete male morphs (fighter- and scrambler-selected populations) that differ in relative fitness depending on temperature.ResultsAt decreased temperature, males from fighter-selected populations showed higher transcriptomic plasticity, as indicated by a significant selection treatment by temperature (decreased vs. control) interaction effect on the expression of 40 genes, 38 of which were overexpressed in fighter-selected populations in response to temperature decrease. These genes were mostly associated with carbohydrate metabolism. At increased temperature, no selection-by-temperature interaction in gene expression was detected. Hence, between-morph differences in response to increased temperature are most likely determined by genes consistently differing in expression between morphs. These genes were associated with protein metabolism, ion transport, lipid metabolism and oxidoreductase activity among others. In females, we did not find genes with selection-treatment-specific response to temperature decrease or increase, but both sexes differed between selection treatments in expression of 79 genes. They can be treated as candidates for genes underlying temperature sensitivity of fitness differences between females from fighter- and scrambler-selected populations.ConclusionDifferent mechanisms underly the divergence in thermal response between populations differing in sexually selected traits prevalence at decreased vs. increased temperature. While temperature decrease was associated with higher transcriptomic plasticity of males with more elaborate armaments, differential response to temperature increase likely depended on genes associated with their distinct thermal tolerance. Selection on males drove gene expression patterns in females. These patterns could be associated with temperature-dependent fitness differences between females from fighter- vs. scrambler-selected populations reported in previous studies. Our study shows that selection for divergent male sexually selected morphologies and behaviors has a potential to drive divergence in metabolic pathways underlying plastic response to temperature in both sexes.
Survival analysis of patients with oral squamous cell carcinoma treated by radical surgery for the first time
Authors: Li Yadong , Dong Linsheng , Xue Lingli , Fang Chuan , Cheng Wei , Tang Jin 
Published: August 2022

Abstract﻿Objective:To investigate the five-year overall survival (OS) rate and postoperative survival time of patients with oral squamous cell carcinoma (OSCC), and to analyze the clinical and pathological factors affecting the survival of patients with OSCC.Methods:We collected the data of patients with OSCC received radical surgical treatment for the first time in the department of maxillofacial surgery of the first affiliated hospital of Chongqing medical university from Apr. 2015 to Dec 2016.Follow-up was conducted until March 2022.Results:A total of 68 patients were included in this study.Tongue (35.3%) was the most common part, followed by cheek (30.9%).The 5-year OS rate was 55.9%, about 52.9% of OSCC patients had recurrence and metastasis after surgery, and the 5-year overall disease-free survival rate was 42.6%. The univariate analysis showed that clinical stage, size of tumor, lymph node metastasis (pN), pathological differentiation and recurrence and metastasis were the exposure factors affecting survival time (p<0.05). Multivariate analysis showed that drinking, pathological differentiation and recurrence and metastasis were independent factors affecting survival time (P<0.05). Another special finding was that 4 patients with OSCC were found to suffer from esophageal squamous cell carcinoma (ESCC) within 1-4 years after surgery.Conclusion:The survival prognosis of patients with OSCC is correlated with clinical stage, size of tumor, lymph node metastasis (pN), pathological differentiation, recurrence and metastasis. drinking, pathological differentiation and recurrence and metastasis were independent factors affecting survival time. Clinical screening of esophageal squamous cell carcinoma may be performed routinely in OSCC patients with a history of alcohol and tobacco.Mini Abstract:The survival prognosis of patients with OSCC is correlated with clinical stage, size of tumor, lymph node metastasis (pN), pathological differentiation, recurrence and metastasis.
Chromosomal copy-number variation analysis of villous tissues using molecular karyotyping in early missed abortions
Authors: Xue Huili , Guo Qun , Yu Aili , Lin Min , Chen Xuemei , Xu Liangpu , Huang Hailong 
Published: August 2022

Abstract
Karyotype abnormalities are the most common etiology of early spontaneous miscarriage. However, traditional karyotyping of chorionic villus samples (CVSs) is limited by cell culture and its low resolution. The objective of our study was to investigate the efficiency of molecular karyotyping technology in detecting the CNVs of early missed abortion tissues. Chromosome analysis of 1160 abortion CVSs in early pregnancy, collected by hysterosuction, was conducted in Fujian, China, with informed consent secured from the participants; 449 chromosomal CNV analyses were conducted via CNV-seq and 711 analyses were conducted using microarray. Clinically submicroscopic CNVs of abortion villous tissues were identified to clarify the cause of the abortion and to guide the participants’ subsequent pregnancies. Among the 1160 samples, 754 cases (65.0%) with genetic abnormalities were identified, of which, 531 (45.8%) were single aneuploidies, 31 (2.7%) were multiple aneuploidies, 50 (4.3%) were polyploidies, 53 (4.6%) were partial aneuploidies, 78 (6.7%) had a microdeletion or microduplication, and 8 cases (0.7%) were uniparental disomies. However, compared with the young maternal age group, the embryotic numerical and structural chromosomal rate was significantly different in the advanced maternal age group, while there was no significant positive correlation between maternal age and other types of genetic abnormalities. A higher detection rate of embryotic chromosomal abnormalities, especially submicroscopic CNVs, was achieved using CNV-seq and microarray. Our results indicate that embryonic CNVs cause early miscarriage and highlight the importance of CNV analysis in CVSs, irrespective of maternal age.
Promoting Membrane Electrode Assembly via Blocking Nafion's Sulfonate Group with Cyclohexanol: Releasing Pt Activity and Improving Mass Transport
Authors: Chen Fadong , Chen Siguo , Wang Aoxue , Wang Meng , Guo Lin , Wei Zidong 
Published: August 2022

Abstract
Owing to the physical confinement of Nafion ionomer and the specific adsorption of sulfonate (-SO3H) group on Pt, the catalytic activity of Pt-based catalysts for the oxygen reduction reaction (ORR) has been badly suppressed in membrane electrode assembly (MEA). Herein, we report a blocking strategy with cyclohexanol to mitigate the detrimental impacts of Nafion ionomer in cathode catalyst layer. The stereoscopic cyclohexanol incorporated in the ionomer has cut off the poisoning adsorption of -SO3H group on Pt and increased the loose of the ionomer in catalyst layer. As a result, MEA with cyclohexanol has reached a mass activity as high as 0.87 A mgPt-1 @0.85 V and a peak power density of 1.772 W cm-2 in the H2/O2 fuel cell, 40% and 47% higher relative to these of the MEA with only Nafion ionomer, respectively. The demonstrated strategy provides a new direction for fully releasing the catalytic activity of Pt in MEA.
Fixed-Time Adaptive Fuzzy Control For Time-Varying Systems Based On Nominal
Authors: Yi Bing , Liu Zhi , Zhang Yun , Chen C. L. Philip , Wu ZongZe 
Published: August 2022

Abstract
The fixed-time control for systems with timevarying parameters is investigated in this article. Different from the previous pure robust control, the proposed method is less conservative. Applying this method could avoid the existence of unknown time-varying parameter derivatives in control design. Combining with adaptive fuzzy control and projection operator, a novel singularity-avoidance virtual controller is constructed via backsteping. The proposed controller guarantees that the tracking errors converge to a user-defined precision within a prescribed fixed-time. Two examples are used to show that this method can achieve fixed time control even if the time-varying parameters are unknown and non-asymptotically constant.
The Long-run Effects of Fetal PM2.5 Exposure on Mental Health: Evidence from China
Authors: Ai Hongshan , Wu Jia , Zhou Zhihan 
Published: August 2022

Abstract
This paper investigates the long-run effects of PM2.5 exposure in utero on the mental health of adolescents. Using nationally representative survey data from China, we instrument the PM2.5 exposure with wind speed to tackle the possible endogenous problem of the PM2.5 exposure. Our results show that mothers’ PM2.5 exposure during their pregnancy has negative effects on the mental health of their children aged between 10 and 15. A one μg/m3 increase in PM2.5 exposure in utero increases the probability of having a severe mental illness for adolescents by 0.6%. Our evidence supports the “fetal origins” hypothesis. We also find that fetal PM2.5 exposure leads adolescents to be more likely to be absent from school and quarrel with their parents, implying that fetal PM2.5 exposure probability affects individuals’ behavior when they grow up.JEL codes: J13, J24, Q53