Miracle-dz/UniFAR-FTUs huggingface dataset:
Molecular Dynamic Simulations and Experiments Study on the Mechanical Properties of HTPE Binders

The mechanical properties of HTPE binders have been systemically studied through combining the microstructure molecular simulations with macroscopic experiments. In this study, the crosslinking structures of HTPE binders were established by a computational procedure. Based on the optimized crosslinking models, the mechanical properties and the glass transition temperatures (Tg) of HTPE/N-100, HTPE/HDI, HTPE/TDI, and HTPE/IPDI binder systems were simulated; specifically, the Tg were 245.758 K, 244.573 K, 254.877 K, and 240.588 K, respectively. Then the bond-length distributions, conformation properties, cohesive energy densities, and fraction free volume were investigated to analyze how the microstructures of the crosslinking models influenced the mechanical properties of HTPE binders. Simultaneously, FTIR-ATR spectra analysis of HTPE binders proved that the special peaks, such as -NH and -NCO, could be seen in the crosslinking polyurethane structures synthesized between prepolymers and curing agents. The dynamic mechanical analysis was carried out, and it found that the Tg of HTPE/N-100, HTPE/HDI, HTPE/TDI, and HTPE/IPDI binder systems were −68.18 °C, −68.63 °C, −65.67 °C, and −68.66 °C, respectively. In addition, the uniaxial tension verified that both the ultimate stress and Young’s modulus of HTPE binder systems declined with the rising temperatures, while the strains at break presented a fluctuant variation. When it was closer to glass temperatures, especially −40 °C, the mechanical properties of HTPE binders were more prominent. The morphology of the fractured surface revealed that the failure modes of HTPE binders were mainly intermolecular slipping and molecular chain breakage. In a word, the experimental results were prospectively satisfied using the simulations, which confirmed the accuracy of the crosslinking models between prepolymers and curing agents. This study could provide a scientific option for the HTPE binder systems and guide the design of polyurethanes for composite solid propellant applications.
Chiral skyrmions in the plane

Magnets without inversion symmetry are a prime example of a solid-state system featuring topological solitons on the nanoscale, and a promising candidate for novel spintronic applications. Magnetic chiral skyrmions are localized vortex-like structures, which are stabilized by antisymmetric exchange interaction, the so-called Dzyaloshinskii–Moriya interaction. In continuum theories, the corresponding energy contribution is, in contrast to the classical Skyrme mechanism from nuclear physics, of linear gradient dependence and breaks the chiral symmetry. In the simplest possible case of a ferromagnetic energy in the plane, including symmetric and antisymmetric exchange and Zeeman interaction, we show that the least energy in a class of fields with unit topological charge is attained provided the Zeeman field is sufficiently large.
Influence of Wake Structure on Unsteady Flow in a Low Pressure Turbine Blade Passage

The effect of wake structures on the evolution of the boundary layer over the suction side of a high-lift low-pressure turbine blade is studied using large-eddy simulation (LES) for a Reynolds number Re = 7.8 × 10 4 (based on the axial chord and the inlet velocity). The wake data of different characteristics (defined by the wake deficit and the small-scale motion) are extracted from a precursor LES of flow past a cylinder. This replaces a moving bar that generates wakes in front of a cascade. LES results illustrate that apart from the wake kinematics, the large pressure oscillations and rollup of the separated shear layer along the rear half of the suction surface depend on the length scale of the convective wake. The transition of this rolled-up shear layer is influenced by the wake turbulence and the small-scale motion.
Resilience as a Factor Influencing Psychological Distress Experience in Patients with Neuro-Oncological Disease

Cancer causes psychological distress. Approximately one-third of all patients with cancer suffer from distress requiring psycho-oncological treatment. Examining factors contributing to their distress can inform approaches to counteracting them. Among such factors, resilience is considered to be a psychological adaptive capacity resulting from complex genetic, epigenetic, psychological, and environmental influences. For that reason, we investigated resilience as a factor of psychological distress experience among patients with neuro-oncological disease. To assess distress among patients with neuro-oncological diseases, we performed electronic psycho-oncological screening in the Department of Neurosurgery at Tübingen University Hospital (n = 100) following tumor surgery (T0) using the Resilience Scale 13, the Hornheider Screening Instrument, the Patient Health Questionnaire-2, the Generalized Anxiety Disorder Scale-2, and the Distress Thermometer, all administered on tablets. Follow-up was done 6 months after (T1). The distress of patients with neuro-oncological disease decreased significantly after 6 months (p < 0.01). Most patients (87%) showed moderate to high resilience. Although significant correlations with distress are measurable at the T0 time point (ρ = −0.318 **, p < 0.01), no significant correlations were observed at T1. Thus, resilience seems to significantly impact distress in the acute phase of the neuro-oncological disease. For clinical practice, our findings suggest that resilience-focused screening can provide useful information about patients at risk of experiencing distress.
Prospective Study of Laparoscopic Management of Appendicitis during the COVID Pandemic in a Single Paediatric Centre

Background: The coronavirus (COVID-19) pandemic affected the presentation of many conditions. This study analyses and describes the impact of the COVID-19 pandemic on the management of appendicitis in children and the role of laparoscopy. Materials and Methods: We performed a prospective (during the pandemic) and retrospective (historic control) review of the management of appendicitis in a tertiary paediatric surgical unit. Preoperative data, operative findings and patient outcomes were compared between groups to identify differences between the study periods and to identify any factors predictive of outcomes. Results: Sixty-two patients were identified in the pre-pandemic cohort, 72 in the pandemic cohort. There was no significant difference in patient demographics, length of admission or time between admission and surgery between groups. There was however a significantly longer time to presentation to hospital in the pandemic group. Clinical outcomes were comparable between the two groups, with no difference in the presence of surgical complications or histologically advanced appendicitis between the two groups. Laparoscopic surgery was safely used to manage appendicitis in the pandemic cohort through utilisation of a COVID-19 pathway that included guidance on testing, and use of personal protective equipment (PPE). Conservative management in the pandemic cohort was reserved for patients with appendicitis with the presence of mass formation. Conclusion: Despite a delayed presentation to hospital, there was no rise in the incidence of complicated appendicitis, complications of surgery or length of stay during the COVID-19 pandemic. Laparoscopic appendicectomy was also shown to be a safe and effective standard for the management of appendicitis during the pandemic. Level of Evidence: III, treatment.
Non-thermal plasma elicits ferrous chloride-catalyzed DMPO-OH

Abstract Non-thermal plasma (NTP) induces the generation of reactive oxygen species (ROS) and reactive nitrogen species, such as hydroxyl radicals (•OH), hydrogen peroxide (H2O2), singlet oxygen, superoxide, ozone, and nitric oxide, at near-physiological temperatures. These molecules promote blood coagulation, wound healing, disinfection, and selective cancer cell death. Based on these evidences, clinical trials of NTP have been conducted for treating chronic wounds and head and neck cancers. Although clinical applications have progressed, the stoichiometric quantification of NTP-induced ROS remains unclear in the liquid phase in the presence of FeCl2 or FeCl3 in combination with biocompatible reducing agents, which may modulate the final biological effects of NTP. In this study, we employed electron paramagnetic resonance spectroscopy to quantify ROS using spin-trapping probe, 5,5-dimethyl-1-pyrroline-N-oxide (DMPO) and H2O2, using luminescent probe in the presence of FeCl2 or FeCl3. NTP-induced DMPO-OH levels were elevated 10–100 µM FeCl2 or 500 and 1000 µM FeCl3. NTP-induced DMPO-OH with 10 µM FeCl2 or FeCl3 was significantly scavenged by ascorbate, α-tocopherol, dithiothreitol, reduced glutathione, or oxidized glutathione, whereas dehydroascorbate was ineffective in 2 mM DMPO. NTP-induced H2O2 was significantly degraded by 100 µM FeCl2 and FeCl3 in an iron-dependent manner. Meanwhile, decomposition of H2O2 by catalase decayed DMPO-OH efficiently in the presence of iron, indicating iron causes DMPO-OH production and degradation simultaneously. These results suggest that NTP-induced DMPO-OH is generated by the H2O2-consuming, iron-dependent Fenton reaction and ferryl intermediates. The potential iron-mediated ROS production by NTP is also discussed to clarify the interaction between NTP-induced ROS and biomolecules.
Automatic Component Prediction for Issue Reports Using Fine-Tuned Pretrained Language Models

Various issues or bugs are reported during the software development. It takes considerable effort, time, and cost for the software developers to triage these issues manually. Many previous studies have proposed various method to automate the triage process by predicting component using word-based language models. However, these methods still suffer from unsatisfactory performance due to their structural limitations and ignorance of the word context. In this paper, we propose a novel technique based on pretrained language models and it aims to predict a component of an issue report. Our approach fine-tunes the pretrained language models to conduct multilabel classifications. The proposed approach outperforms the previous state-of-the-art method by more than 30% with respect to the recall at ${k}$ on all the datasets considered in our experiment. This improvement suggests that fine-tuned pretrained language models can help us to predict issue components effectively.
The Effectiveness of Social Cognitive Career Therapy Counseling in Career Decision Making

The problem that many students experience today is related to difficulties in making career decisions. As for helping students make career decisions, a comprehensive intervention is needed, and one alternative that can be used is to provide social cognitive career counselling. This study aimed to confirm the effectiveness of social cognitive career therapy counselling on career decision-making. This study uses a repeated measurement experimental design. The subjects in this study were 6 students of SMA Negeri 3 Mataram who were indicated to have the ability to make career decisions which were shown in the low category. Data collection uses an instrument adapted from The Career Decision Making Self Efficacy Short Form Scale. Data analysis used repeated measure ANOVA statistics. The results of this study indicate that effective social cognitive career therapy counselling can improve students' ability to make career decisions. Furthermore, this study shows a significant difference in students' career decision-making from a gender perspective, where female students have a better ability to make career decisions than male students.
An advanced laser-Doppler velocimeter for full-vector particle position and velocity measurements

An advanced laser-Doppler measurement technique has been developed for fully resolved three-component particle position and velocity vector measurements in turbulent flows. The instrument deemed the ‘comprehensive’ laser-Doppler velocimeter employs a novel optical arrangement to measure multiple-component sub-measurement-volume-scale seed particle positions simultaneously with the velocity vector measurements of conventional laser-Doppler velocimetry (LDV). In the current paper, the effectiveness of the position resolution capabilities is considered, which allows for velocity statistics measurements at multiple locations within the measurement volume. Design estimates for the position vector uncertainties for a particle passing the measurement volume are about 3 µm root mean square in any direction, although in situ estimates indicate an uncertainty value closer to 14 µm with the possibility of further refinement through optimized alignment. To validate the operation of the instrument, measurements are presented in turbulent boundary layers previously examined with high-resolution conventional LDV. The flat-plate turbulent boundary layer is studied at two Reynolds numbers up to Reθ = 7500. Measurements are also presented in a pressure-driven three-dimensional turbulent boundary layer created beside a wing/body junction. These measurements illustrate the effectiveness of the technique for obtaining highly resolved velocity profiles within the measurement volume and give the highest spatial resolution velocity statistics published for Reynolds numbers of the magnitude studied.
On Cauchy’s functional equation

for real-valued functions of a real variable. P. Erdos [2] asked, after learning about a preliminary result of S. Hartman [3], whether one obtains all functions satisfying (C) for almost all pairs (x, y) by simply redefining the functions satisfying (C) for all (x, y) in an arbitrary manner on sets of measure zero. This turns out to be the case (Theorem I), in particular, if f satisfies (C) for almost all (x, y) and is also measurable or only bounded from below on a set of positive measure, then f(x) = cx holds almost everywhere as a consequence of well-known theorems of A. Ostrowski [5], H. Kestelman [4 ]. I. Halperin asked whether (C) for all (x, y) in conjunction with
Adjuvant chemotherapy is not associated with improved overall survival with stage I endometrioid ovarian cancer patients in a SEER cohort

The objectives of this study was to investigate the prognostic significance of adjuvant chemotherapy in early-stage endometrioid ovarian cancer (EnOC) patients, especially those with grade II stage IA and IB and grade I stage IC, that are not explicitly recommended in the current National Comprehensive Cancer Network (NCCN) guidelines. This was a retrospective cohort study based on the Surveillance, Epidemiology and End Results (SEER) database, comprising 875 cases diagnosed with stage I EnOC from 2010 to 2018, of whom 441 (50%) and 434 (50%) received and did not receive chemotherapy, respectively. The Kaplan-Meier method was used for survival analysis, and the Cox multivariate regression analysis was performed to identify independent prognostic factors. Stratified survival analysis for adjuvant chemotherapy based on the recommendations of the NCCN Guidelines in stage I EnOC patients with different substages and grades showed that in this cohort adjuvant chemotherapy did not improve the survival of any of the stage I stratified substages group ( p = 0.076, HR: 0.600, 95% CI: 0.342–1.054). Age ≥ 60 ( p = 0.000, HR: 3.609, 95% CI: 2.156–6.039) and elevated CA125 ( p = 0.028, HR: 2.480, 95% CI: 1.103–5.577) were independent risk factors associated with worse survival in stage I EnOC patients. In conclusion, chemotherapy would be unnecessary for stage I EnOC patients to improve the overall survival no matter substage and grade in our cohort.
A Proof of the Welch and Niho Conjectures on Cross-Correlations of Binary m-Sequences

Binary m-sequences are widely applied in navigation, radar, and communication systems because of their nice autocorrelation and cross-correlation properties. In this paper, we consider the cross-correlation between a binary m-sequence of length 2m? 1 and a decimation of that sequence by an integer t. We will be interested in the number of values attained by such cross-correlations. As is well known, this number equals the number of nonzero weights in the dual of the binary cyclic code C1,t of length 2m? 1 with defining zeros ? and ? t, where ? is a primitive element in GF(2m). There are many pairs (m, t) for which C? 1,t is known or conjectured to have only few nonzero weights. The three-weight examples include the following cases:We present a method of proving many of these known or conjectured results, including all of the above cases, in a unified way.
Linking high-performance work systems to affective commitment, job satisfaction, and career satisfaction: Thriving as a mediator and wasta as a moderator

Abstract This study examines how high-performance work systems (HPWSs) are related to Saudi employees’ work and career outcomes. Drawing on the socially embedded model of thriving, we propose a model that includes the mediating role of thriving at work and the moderating role played by wasta in the relationship between HPWS and the employee outcomes of affective commitment, job satisfaction, and career satisfaction. To test the conceptual model, we collected data from 187 healthcare workers across Saudi Arabian hospitals at three time points. Our findings reveal that HPWSs positively affect employees’ thriving at work, which in turn enhances their work and career outcomes. Our study also demonstrates that wasta is a boundary condition that buffers the strength of the effect of HPWSs on thriving and the indirect effects of HPWSs on employees’ work and career outcomes via thriving. This study extends current theoretical knowledge of how and when HPWSs can exert a more positive influence on employee outcomes. In practice, these findings will inform managers of better approaches to leveraging HPWSs and individual cultural values to enhance employee outcomes.
The effects of attenuating returning echolocation signals at the lower jaw of a dolphin (Tursiops truncatus)

Recordings were made duringan echolocation experiment in order to observe any changes in the parameters of outgoing signals as a function of the deliberate attenuation of returning signals at the lower jaw of a dolphin (Tursiops truncatus). A dolphin was conditioned to perform a discrimination task while wearing either of two rubber hoods covering its lower jaw in addition to performing the same task while wearing no hood. A control hood, made of gasless neoprene, allowed returning acoustic signals to pass to the lower jaw. An experimental hood, made of closed-cell neoprene, significantly attenuated such signals. As previously reported (Brill et al., 1988), the dolphin’s ability to echolocate was significantly hindered while wearing the experimental hood. The acoustical data we recorded during that experiment suggest that the use of the hoods did not affect the dolphin’s ability to emit useful echolocation signals. The dolphin appeared to vary the temporal parameters of its emitted signals in terms of lower click repetition rates in both the control and experimental conditions and interclick intervals (ICIs) of shorter duration in the experimental condition. The lower repetition rates and shorter ICI’s in the latter condition are attributed to the attenuation of returning echoes at the dolphin’s lower jaw. The results support the theory that returning echolocation signals are best received along the lateral sides of the dolphin’s lower jaw.
Photocurrent and photoluminescence of a single self-assembled quantum dot in electric fields

We have fabricated single-quantum-dot photodiodes by embedding InGaAs quantum dots in the intrinsic region of an n-i-Schottky diode combined with near-field shadow masks. As a function of the bias voltage, we study one and the same quantum dot in the two complementary regimes of photocurrent and photoluminescence. The Stark shift of the exciton ground state continues monotonically in both regimes, confirming nicely the observation of the same quantum dot in photoluminescence and photocurrent. In the limit of high electric fields, we observe a broadening of the photocurrent linewidth from which we determine a strongly reduced exciton lifetime of below 1 ps.
Statistical Measurements on Conversational Speech

Using apparatus designed to collect a large number of data in a short time, the following measurements have been made: peak and r.m.s. pressures in one‐eighth‐second intervals, and in various bands of frequencies up to 12,000 cycles per second, from the voices of six men and five women; comparison of r.m.s. pressures in one‐eighth‐ and one‐fourth‐second intervals, from a single male voice; and distribution of the instantaneous pressures in whole speech, from a single voice. Derived from these data are peak factors in one‐eighth‐second intervals, and frequency distribution of speech energy in long intervals. Both the absolute value and the distribution of energy are found somewhat different from previously published results.
Group B Streptococcus: Virulence Factors and Pathogenic Mechanism

Group B Streptococcus (GBS) or Streptococcus agalactiae is a major cause of neonatal mortality. When colonizing the lower genital tract of pregnant women, GBS may cause premature birth and stillbirth. If transmitted to the newborn, it may result in life-threatening illnesses, including sepsis, meningitis, and pneumonia. Moreover, through continuous evolution, GBS can use its original structure and unique factors to greatly improve its survival rate in the human body. This review discusses the key virulence factors that facilitate GBS invasion and colonization and their action mechanisms. A comprehensive understanding of the role of virulence factors in GBS infection is crucial to develop better treatment options and screen potential candidate molecules for the development of the vaccine.
Plasmonic planar antenna for wideband and efficient linear polarization conversion

The design of metasurfaces able to efficiently control the polarization state of an electromagnetic wave is of importance for various applications. We demonstrate both theoretically and experimentally that plasmonic planar L-shaped antennas can induce a 90◦-rotation of the linear polarization of light with a nearly total efficiency in the infrared (3-5 µm). The nanoantenna geometry is engineered so that the polarization conversion occurs over a 1 μm-wide spectral band ([3.25-4.25] µm ) with a mean polarization conversion efficiency of 95 %. In order to validate a theoretical model describing the antenna behaviour, we investigate the polarization conversion effect as function of the incident and azimuthal angles.
PENINGKATAN AKTIVITAS DAN HASIL BELAJAR KURIKULUM MERDEKA MENGGUNAKAN MODEL PROBLEM BASED LEARNING (PBL) DI KELAS IV SEKOLAH DASAR

Penelitian ini berawal dari refleksi guru tentang kurikulum merdeka di sekolah dasar. Dalam proses pembelajaran terlihat bahwa aktivitas siswa dalam belajar kurikulum merdeka di kelas IV SDN 23 Malabur masih rendah. Penelitian ini bertujuan untuk mengumpulkan data dan informasi mengenai aktivitas dan hasil belajar siswa kelas IV SDN 23 Malabur dengan menerapkan model Problem Based Learning. Penelitian ini menggunakan pendekatan kualitatif dan kuantitatif. Jenis penelitian yaitu Penelitian Tindakan Kelas (PTK). Subjek penelitian ini adalah guru dan siswa kelas IV SDN 23 Malabur sebanyak 20 orang. Penelitian ini dilaksanakan sebanyak dua siklus. Rancangan penelitian ini meliputi, (1) perencanaan, (2) pelaksanaan, (3) tindakan dan pengamatan, dan (4) refleksi. Data dikumpulkan dengan observasi dan melakukan tes hasil belajar siswa. Analisis data dilakukan dengan teknik persentase. Hasil penelitian menunjukkan peningkatan aktivitas belajar siswa sebesar 24% dan begitu pula peningkatan hasil belajar sebesar 15%. Dengan demikian, model Problem Based Learning terbukti dapat meningkatkan aktivitas dan hasil belajar siswa kelas IV SDN 23 Malabur.