bluuebunny/crossref_metadata_2025_split huggingface dataset:
The stone left unturned: boredom among young EFL learners
Authors: Mahmoudi-Gahrouei Vahid , Kruk Mariusz , Moafian Fatemeh , Farahmand Boroujeni Maryam 
Published: April 2024

Abstract
The present study explores the under-researched phenomenon of boredom, its antecedents, and solutions, as well as the boredom-generating parts of English classes among 227 young learners of English in an Iranian context. Data were collected through an open-ended questionnaire, and semi-structured interviews were thematically analyzed using MAXQDA (Version 2022) to extract themes concerning the issues under study. Findings revealed that teachers’ lack of control over students’ behavior, lack of classroom management, lack of fun in teaching, excessive repetitions, teacher-centered teaching, and classroom physical environment were the main causes of boredom. As for solutions to learners’ boredom, introducing better classroom management strategies, making the class more effervescent, making teaching more learner-centered, and enhancing classroom physical environment were suggested. The findings also revealed that the middle of the English class was the most boredom-generating part for the young learners of English.
Characteristics of bulletproof plate made from silkworm cocoon waste: Hybrid silkworm cocoon waste-reinforced epoxy/UHMWPE composite
Authors: Jarupong Jeerasak , Sasrimuang Suparat , Artnaseaw Apichart 
Published: April 2024

Abstract
This study aims to develop composite plates using silkworm cocoon waste- and hybrid silkworm cocoon waste-reinforced polymer composite using epoxy resin as a matrix to replace synthetic fibers in bulletproof plates. The fabrication involved mixing 70 g of silkworm cocoon waste with 240 g of resin and 70 g of ultra-high molecular weight polyethylene, followed by cold compression molding. Tensile and impact tests on the resulting samples, using a standardized 9 mm projectile, showed a tensile strength of 107.4 MPa and an elastic modulus of 1240.3 MPa. With a back face signature (BFS) of 21.25 mm, the samples effectively intercepted the projectile, satisfying the stringent U.S. National Institute of Justice standard 0101.06, which specifies a maximum BFS of 44 mm. In comparison with hemp woven materials, silkworm cocoon waste has proven to be a promising substitute for both tensile and impact evaluations, attracting considerable interest and underscoring its role as a reinforcing agent for national fiber. This research has significant implications for industries and applications requiring affordable, lightweight, and efficient safeguards against ballistic dangers. Ultimately, it contributes to the progress of ballistic protection methods by encouraging exploration into innovative, bio-inspired, and sustainable materials capable of achieving superior impact resistance.
Self-efficacy, Effort, and Performance Perceptions Enhance Psychological Responses to Strength Training in National Collegiate Athletic Association Division I Athletes
Authors: Biscardi Lauren M. , Miller Angela D. , Andre Matthew J. , Stroiney Debra A. 
Published: April 2024

Abstract
Biscardi, LM, Miller, AD, Andre, MJ, and Stroiney, DA. Self-efficacy, effort, and performance perceptions enhance psychological responses to strength training in National Collegiate Athletic Association Division I athletes. J Strength Cond Res 38(5): 898–905, 2024—This study examined the effect of self-efficacy, effort, and perceived performance on positive well-being (PWB) and psychological distress (PD) following high-intensity resistance training sessions in collegiate student-athletes. An observational field study design was used to collect data before and after resistance training sessions in a 4-week preseason strength training block. A multilevel model assessed day-level and person-level variance in acute PWB and PD. Interaction terms were also tested at the day level. Alpha was set at 0.05. Within a 4-week training block, training session intensity did not predict changes in acute psychological responses. After controlling for an athlete's preexercise psychological state, higher self-efficacy, daily effort, and perceived performance predicted higher PWB and lower PD following training (p < 0.05). Self-efficacy moderated the relationships of daily effort and performance with PD (p < 0.05). When athletes experienced lower self-efficacy, producing a higher effort and perceiving better performance reduced the negative psychological response. These findings highlight the important mediating role of cognitive variables in the acute psychological response to high-intensity resistance training. Coaches should identify and mitigate low cognitive states to facilitate a positive psychological response to resistance training. This strategy promotes a positive psychological response without altering training prescription.
A Biomechanical Comparison of the Back Squat and Hexagonal Barbell Deadlift
Authors: Stahl Cody A. , Regni Giancarlo , Tanguay Jonathan , McElfresh Maddie , Trihy Eoghan , Diggin David , King Deborah L. 
Published: April 2024

Abstract
Stahl, CA, Regni, G, Tanguay, J, McElfresh, M, Trihy, E, Diggin, D, and King, DL. A biomechanical comparison of the back squat and hexagonal barbell deadlift. J Strength Cond Res 38(5): 815–824, 2024—Coaches often use different exercises to encourage similar strength adaptations and limit monotony. Anecdotally, the hexagonal barbell deadlift (HBD) exhibits similarities to the back squat (BS). To date, research has not examined the empirical differences between these exercises. This study examined kinematic and kinetic differences between the BS and the HBD across different loads. Sixteen resistance-trained individuals (6 men and 10 women) volunteered to participate. Subjects performed 1-repetition maximum (1RM) testing under BS and HBD conditions. Kinematic and kinetic data were collected during performance of both exercises at submaximal (warm-up sets) and maximal (1RM) loads using a 3D motion capture and force-plate system. Results showed that subjects lifted greater 1RM loads in the HBD relative to the BS (p < 0.05; d = −1.75). Kinematic data indicated that subjects exhibited greater maximum forward lean of the trunk and decreased maximum knee flexion while performing the HBD compared with the BS. The BS resulted in higher maximum extension moments at the hip joint than the HBD. Maximum extension moments at the knee joint showed no difference between the exercises. Data suggest that bar design and position facilitate balanced moment arm length at hip and knee joints during performance of the HBD. By contrast, bar position during performance of the BS increases moment arm length at the hip joint, making it a hip-dominant exercise. The present data have implications for the programming of both exercises. Future research should examine differences in muscle-activation strategies between the 2 exercises.
Observe, Practice, and Improve? Enhancing Sidestep Cutting Execution in Talented Female Soccer Players: A Four-Week Intervention Program With Video Instruction
Authors: Nijmeijer Eline M. , Kempe Matthias , Elferink-Gemser Marije T. , Benjaminse Anne 
Published: April 2024

Abstract
Nijmeijer, EM, Kempe, M, Elferink-Gemser, MT, and Benjaminse A. Observe, practice and improve? Enhancing sidestep cutting (SSC) execution in talented female soccer players: A four-week intervention program with video instruction. J Strength Cond Res 38(8): e430–e439, 2024—Implicit learning has the potential to improve movement execution and reduce injury risk. Previous research showed beneficial effects of short-term interventions with implicit learning in male athletes. However, research on long-term interventions in female athletes is lacking. The aim of this study was to examine the effects of a 4-week intervention with video instruction on movement execution of SSC, a task that is highly related with anterior cruciate ligament (ACL) injury risk, in female athletes. Twenty talented adolescent female soccer players were part of the control (CTRL, n = 10) or video instruction (VIDEO, n = 10) group. All subjects practiced 4 weeks and received general task instructions. In addition, the VIDEO group received expert video instruction during practice. Lower extremity kinematics and kinetics and vertical ground reaction force of SSC were examined during baseline, immediate post, and 1-week retention tests. After nonlinear registration, differences between each subject and the expert she had seen were determined. These differences were analyzed with SPM1D 2-way ANOVA. No interaction effects between time and group were found (p > 0.05). Main effects of time were found in the frontal plane. In particular, smaller deviations of subjects compared with the seen expert of the knee adduction (p = 0.005, 97.9–100% stance phase [SP]) and hip abduction (p = 0.005, 11.5–13.8% SP) and adduction (p < 0.001, 33.4–87.7% SP) moments were found in immediate post compared with baseline. These frontal plane short-term improvements, replicating earlier findings in both sexes, may lower ACL injury risk. The large observed interindividual differences over time may have concealed the long-term effects of video instruction at the group level.
Comparison of Near-Surface Attenuation from Surface Array-Based Seismic Noise Data and Borehole Weak-Motion Recordings at the STIN Test Site in Northeastern Italy
Authors: Dreossi Ilaria , Parolai Stefano 
Published: April 2024

Abstract
Seismic wave attenuation and the related shear-wave quality factor (QS) in the near surface are crucial parameters for ground motion simulations and seismic hazard assessments. Although recent approaches developed to calculate QS from seismic noise acquired by surface arrays have been accepted for practice, additional testing and comparison of results estimated using various geophysical methods are still necessary to verify the reliability of such techniques. This work presents the results of an experiment conducted at the STIN site in northeastern Italy, which is equipped with a 100 m deep instrumented borehole. A seismic noise campaign was implemented by installing a temporary independent local surface array of seismological stations. The gathered data were used to initially estimate the shear-wave velocity (VS) profile and frequency-dependent Rayleigh-wave attenuation, and subsequently determine the QS factor via a linearized inversion method. The study compares these findings with the VS and QS values derived from analyzing weak-motion events recorded by two permanent seismic sensors positioned at the top and bottom of the well. The results confirm the potential of the inversion procedure used to obtain QS from local-scale seismic noise arrays as a promising approach for conducting attenuation studies at the local level in less geologically complex sites.
The Effect of Imbibition on Immersion Hydrocolloid Irreversible Alginate Sodium Hypochlorite Disinfectant Solution and Red Betel Leaf (Pipper Crocatum) Extract
Authors: Atmaja Widyapramana Dwi , Hanifah Rifa Rihadatul 
Published: April 2024

Background: impressing the patient's oral cavity in dentistry can pose a risk of cross infection between doctor and patient. Therefore it is necessary to disinfect the impression material to remove bacteria that stick to the impression material. Disinfection that can be used besides sodium hypochlorite can also extract red betel leaves. Purpose: to find out the difference of imbibition on immersion hydrocolloid irreversible alginate in sodium hypochlorite 1% and red betel leaf extract 100%. Method: this research is experimental with pretest and posttest control group design with 4 treatment groups, 2 groups were immersed in sodium hypochlorite 1% and 2 groups were immersed in red betel leaf extract 100%. Immersing time is 5 and 10 minutes. Each repetition is done 6 times. Negative molds are measured before and after immersion. Data were analyzed using the OneWay Anova Test. Results: The effects of alginate mold imbibition on sodium hypochlorite immersion were greater than immersion in red betel leaf extract. Conclusion: There was a significant difference (p <0.05) in the imbibition of the printed hydrocolloid irreversible alginate soaked in sodium hypochlorite 1% and red betel leaf extract 100% for 5 minutes, and 10 minutes
Blood Biomarker and Physical Activity Correlations in Persons with Parkinson’s Disease
Authors: Morales Julia 
Published: April 2024

Parkinson’s disease (PD) is a debilitating disease that reduces an individual’s quality of life (QOL). PD has a complex pathophysiology, but inflammation is a major contributor. Inflammation is a biological process that removes harmful stimuli and initiates the healing cascade. Researchers commonly use inflammatory markers, such as tumor necrosis factor-alpha (TNFα),interferon-gamma (IFNγ), and interleukin 1-beta (IL1β), to study PD pathologies. While PD is irreversible, physical activity is a non-pharmacological treatment exhibiting beneficial outcomes related to PD and inflammation. To determine if exercise frequency affects the quality of life (QOL) and the magnitude of change in inflammatorybiomarkers associated with PD. Researchers recruited 10 individuals diagnosed with PD to participate in a cross-sectional study. Participants completed four questionnaires to determine their current physical activity (PA) level and QOL. Blood samples were analyzed to determine differences in serum TNFα, IFNγ, and IL1β concentrations between different PA levels of persons with PD. With an alpha level of 0.05, this project only yielded two significant results: an unexpected positive relationship between IL1β and PA level and an expected negative relationship between IL1β and QOL. Although they were not significant, several results trended in the expected directions. Discussion: Observed trends indicated that increasing physical activity decreases inflammatory blood biomarker levels and increases QOL while increasing sedentary behavior increases inflammatory blood biomarker levels and decreases QOL.
THE EVOLUTION OF LEADERSHIP IN THE MODERN PROFESSIONAL LANDSCAPE: SHIFTING PARADIGMS AND THEIR IMPACTS
Authors: Jayanagara Oscar 
Published: April 2024

<p>Leadership plays a pivotal role in guiding and shaping organizations and teams. In the modern professional world, leaders have undergone a transformation, influenced by various factors such as technological advancements, shifting societal expectations, and the dynamics of globalization. This study presents a comprehensive exploration of the multifaceted nature of leadership evolution in the workplace, drawing on data from qualitative research, interviews, and scholarly literature reviews. The findings highlight the shift from hierarchical to collaborative leadership, emphasizing increased interaction, teamwork, and innovation. Furthermore, the significance of communication and collaboration skills in leaders is underscored, with effective communication linked to enhanced team performance and collaboration skills as a key driver of organizational success. In addition, innovation and creativity are identified as critical components of effective leadership, fostering enhanced productivity and competitive advantage. These changes in leadership systems have far-reaching implications, affecting productivity, job satisfaction, and innovation in the workplace. The study underscores the need for leaders to adapt to this evolving landscape and integrate these essential leadership skills, ultimately contributing to effective leadership in the contemporary professional world. This research offers valuable insights into the dynamic nature of leadership in the evolving professional context.</p><p> </p>
Performance Envelope of a 538-Series High-Speed Helico-Axial Pump for High-Gas-Volume-Fraction Operation
Authors: Ejim Chidirim , Xiao Jinjiang , Lee Woon , Zabala Wilson 
Published: April 2024

Summary
Operating at high speeds can have the benefit of increasing the capability of pumps to enhance surface or downhole production of fluids with high gas volume fraction (GVF). This study presents the performance envelope of a high-speed helico-axial pump (HAP) operating at high GVFs (&gt;80%). The ultimate aim of the physical tests was to ascertain the operating capabilities of the pump for potential scaleup to a field prototype.
The HAP housing outer diameter was 5.38 in. and operated at a rotational speed of 6,000 rev/min. Air and water were the test fluids, with an average pump intake and a discharge temperature of 28°C. The fluid volume flow rates were varied while maintaining 46 psig at the HAP intake. The liquid and total intake volume flow rates varied from 128 B/D to 664 B/D and 4,941 B/D to 7,593 B/D, respectively. The corresponding dimensionless pressure boost (DPB), GVF, liquid flow coefficients (LFCs), and total flow coefficients (TFCs) were recorded. Additional parameters noted were the percentage of electric current draw to full-load motor current by the HAP motor and the percentage of electric power input to full load power to the HAP motor.
The results showed that the HAP had a stable operation during the tests for intake GVF range of 91–98%. The corresponding pump DPB was in the range of 0.0138–0.0751. These values being positive indicated the capability of the HAP to boost fluid pressure even for such high intake gas content and avoid pump gas lock. The results also showed that for a given intake GVF, the HAP DPB increased with decreasing LFC. For a given LFC, the DPB decreased with increasing intake GVF. The percent electric input power to the HAP motor varied between 28% and 64% of full-load motor power. It was observed to strongly increase with decreasing LFC at a given intake GVF and very strongly decrease with increasing intake GVF at a given LFC. The associated percent electric current draw by the HAP motor was seen to vary between 24% and 53% of full-load motor current. Its variation with LFC and intake GVF was similar to those of the percent electric power input. The DPB, percent electric current, and power draw by the HAP motor variations with TFC for a given intake GVF were similar to those of the LFCs. In conclusion, the HAP demonstrated the capability to boost fluid pressure when handling high GVF flows. It is being scaled up to a field prototype to handle higher volume flow rates of high GVF gas-liquid mixtures.
This study mainly highlights the method to extend the gas-handling capability of a HAP by operating it at high speeds. Optimal hydraulic design and proper conditioning of the inlet flow components were also incorporated into the HAP architecture. Expanding the HAP operating envelope to handle high-GVF flows significantly unlocks the potential for field operators to maximize hydrocarbon production from high-gas content applications. This, in turn, increases the economic bottom line from the field asset.
WONDER-02: plastic stent vs. lumen-apposing metal stent for endoscopic ultrasound-guided drainage of pancreatic pseudocysts—study protocol for a multicentre randomised non-inferiority trial
Authors: Saito Tomotaka , Takenaka Mamoru , Kuwatani Masaki , Doi Shinpei , Ohyama Hiroshi , Fujisawa Toshio , Masuda Atsuhiro , Iwashita Takuji , Shiomi Hideyuki , Hayashi Nobuhiko , Iwata Keisuke , Maruta Akinori , Mukai Tsuyosh , Matsubara Saburo , Hamada Tsuyoshi , Inoue Tadahisa , Matsumoto Kazuyuki , Hirose Sumio , Fujimori Nao , Kashiwabara Kosuke , Kamada Hideki , Hashimoto Shinichi , Shiratori Toshiyasu , Yamada Reiko , Kogure Hirofumi , Nakahara Kazunari , Ogua Takeshi , Kitano Masayuki , Yasuda Ichiro , Isayama Hiroyuki , Nakai Yousuke 
Published: April 2024

Abstract

Background: Endoscopic ultrasound (EUS)-guided transluminal drainage has become a first-line treatment modality for symptomatic pancreatic pseudocysts. Despite the increasing popularity of lumen-apposing metal stents (LAMSs), plastic stents may resolve non-necrotic fluid collections effectively with lower costs and no LAMS-specific adverse events. To date, there has been a paucity of data on the appropriate stent type in this setting. This trial aims to assess the non-inferiority of plastic stents to a LAMS for the initial EUS-guided drainage of pseudocysts.
Methods: The WONDER-02 trial is a multicentre, open-label, non-inferiority, randomised controlled trial, which will enrol pancreatic pseudocyst patients requiring EUS-guided treatment in 26 centres in Japan. This trial plans to enrol 80 patients who will be randomised at a 1:1 ratio to receive either plastic stents or a LAMS (40 patients per arm). In the plastic stent group, EUS-guided drainage will be performed using two 7-Fr double pigtail stents. In the LAMS group, the treatment will be performed in the same way except for LAMS use. The step-up treatment will be performed viaendoscopic and/or percutaneous procedures at the trial investigator’s discretion. The primary endpoint is clinical success, which is defined as a decrease in a pseudocyst size to ≤ 2 cm and an improvement in inflammatory indicators (i.e., body temperature, white blood cell count, and serum C-reactive protein). Secondary endpoints include technical success, adverse events including mortality, pseudocyst recurrence, and medical costs.
Discussion: The WONDER-02 trial will investigate the efficacy and safety of plastic stents compared to a LAMS in EUS-guided treatment of pancreatic pseudocysts with a particular focus on the non-inferior efficacy of plastic stents. The findings will help establish a new treatment algorithm for this population.
Trial registration: ClinicalTrials.gov NCT06133023 registered on 9 November 2023. UMIN000052647 registered on 30 October 2023. jRCT1032230444 registered on 7 November 2023.
Innovative Tool Condition Classification: Utilizing Time-Frequency Moments as Inputs for BiLSTM Networks in Milling Processes
Authors: Rahman Achmad Zaki , Jauhari Khairul , Huda Mahfudz Al , Rusnaldy Rusnaldy , Widodo Achmad 
Published: April 2024

Abstract

Milling is one of the most important processes in the manufacturing industry, and it uses rotating cutting tools to sculpt raw materials into intricate shapes and structures. However, tool wear and breakage present significant challenges influenced by various factors, such as machining parameters and tool fatigue, which directly impact surface quality, dimensional accuracy, and production costs. Therefore, monitoring cutter wear conditions is essential for ensuring milling process efficiency. This study proposes applying BiLSTM networks to classify end mill tool conditions based on vibration signals. Significant improvements in classification accuracy are achieved by extracting features and utilizing spectrogram analysis. Specifically, utilizing dual spectral vibration signals increases the BiLSTM's average accuracy from 84.5–96.3%. These findings demonstrate the effectiveness of the proposed method for real-time tool condition monitoring in milling operations, offering potential benefits for manufacturing processes.