bluuebunny/crossref_metadata_2025_split huggingface dataset:
ANÁLISIS TERMODINÁMICO A UN COMPRESOR ENFRIADO MEDIANTE CHILLER Y ENFRIAMIENTO EVAPORATIVO
Authors: González Peto Eduardo , Lugo Leyte Raúl , Torres Aldaco Alejandro , Ambriz García Juan Jose , Lugo Méndez Helen Denise 
Published: September 2024

Las condiciones del medio ambiente son fundamentales para analizar correctamente los sistemas energéticos, el cambio en ellas representa un cambio en los recursos. Para un sistema de generación de potencia, cuando la humedad relativa aumenta y la temperatura del medio ambiente disminuye, el trabajo suministrado al compresor disminuye. Existen diferentes sistemas capaces de enfriar el aire aspirado por el compresor, como los sistemas de compresión de vapor (chillers) y los enfriadores evaporativos, mostrados en la Figura 1. Los chillers se pueden utilizar en ambientes con humedades relativas altas y los sistemas de enfriamiento evaporativo en ambientes secos. En este trabajo se realiza la comparación termodinámica de ambos sistemas aplicados al compresor de una turbina de gas a condiciones de P=1atm, T=25°C y f=0.6. El aire aspirado por el compresor se enfría a 19.62°C; la humedad relativa y la eficiencia exergética obtenida en el VC1 son de 0.84 y 6%; mientras que, para el VC2 son de 1 y 79%. El recurso del VC1 y del VC2 es una potencia de 478kW y un flujo másico de agua de 0.3127 kg/s, respectivamente. El compresor requiere una potencia de 55.83MW en el VC1 y 55.52 MW en el VC2.
Reliability analysis of steel plate welded joints considering uncertain data
Authors: Rane Suraj Surendra , Chopra Vinay 
Published: September 2024

Abstract

Fatigue reliability analysis based upon limited and uncertain data brings uncertainties in the inputs such as probability distributions and their respective parameters. However, in practice, the data is compiled by conducting physical tests. The uncertainties based on limited physical test data need to be carefully evaluated. Underestimation or overestimation of the reliability based upon uncertain data and the variability in experimental conditions needs to be evaluated. The uncertainties pertaining to distribution are mitigated using statistical tools. Literature is available wherein either parametric or non-parametric distributions are used to estimate Reliability for uncertain data. However, this paper attempts to use both parametric as well as non-parametric distributions on a set of uncertain data and tries to compare the Reliability. First, the experimental data is assumed to follow the Weibull and Lognormal distribution. The fit of these distributions with the assumed distributions are evaluated and then the reliability is estimated for these distributions. Since the data is limited and uncertain, a non-parametric estimator such as the Kaplan-Meier estimate is used to compute reliability. This paper attempts to fit appropriate failure distribution to uncertain data. The approach is applied on steel plate welded joints and the data on a number of cycles up to failure was studied.
Efficacy of acupuncture in improving ovarian function in patients with Poor Ovarian Response: study protocol for a randomized clinical trial
Authors: Yuan Rongli , Wang Mengjing , Wang Tianyu , Li Zhi , Wu Jie 
Published: September 2024

Abstract

Introduction: Poor Ovarian Response(POR) is a serious and intractable clinical problem that reduces egg success and pregnancy outcomes in assisted reproduction, so there is an urgent need to find an effective treatment in addition to pharmacological therapies. Several studies have shown that acupuncture has the ability to improve ovarian function in women, but there is a paucity of research on acupuncture in ovarian POR, and it is worth exploring the clinical protocol and mechanisms of efficacy of acupuncture.
Methods and analysis: This is a randomised controlled clinical trial protocol and the participants in this study will be female patients aged 30-45 years old undergoing IVF assisted reproduction for POR. Patients will be randomly assigned to trial and control groups by computer-generated sequences, and the groups in this study are: trial group: acupuncture + COS group (Group A), control group: non-meridian, non-acupuncture point placebo acupuncture + COS group (Group B) and COS alone group (Group C). All three groups received the same ovulation induction treatment. In addition, Group A received 8 weeks of real acupuncture treatment, Group B received 8 weeks of non-menstrual, non-acupoint comfort acupuncture treatment, and Group C did not receive any treatment before ovulation promotion. Sex hormone 6 was measured on the second day of menstruation in the month of registration and on the second day of menstruation in the month of the ovulation promotion cycle, and the number of sinus follicles was examined by transvaginal ultrasound in the three groups, respectively. The main observations of this trial will be the number of eggs retrieved and embryological parameters, and the patients' peripheral blood, follicular fluid and stool will be tested. The final data will be analysed by t-test or non-parametric test.
Ethics and dissemination: The study protocol was approved by the Ethics Committee of the University Hospital of Chengdu University of Traditional Chinese Medicine (Ethics Approval No. 2023KL-019) and registered in a publicly accessible database. This study was supported by an institutional grant from Chengdu University of Traditional Chinese Medicine. The results of the study will be presented through peer-reviewed publications and conference presentations. Trial registration number: ChiCTR2300077441
A study on the impact of perceived financial constraints on Chinese consumer preferences for livestreaming scenarios
Authors: Zhan Ying , Deng Xin , Xu Junfei 
Published: September 2024

Abstract

In recent years, China’s economic growth rate has slowed down, the consumption level has increased, the financial pressures on people have risen, and more and more consumers feel financial constraints. Through two experiments, this study explored the impact of the sense of financial constraint on consumers’ livestreaming scene preferences and the dual roles of mediation and moderation of their flow experience. Experiment 1 used a one-way completely randomized design to measure the sense of financial constraint and initially verified that consumers in a state of financial constraint reduce their browsing preferences for artificially constructed types of livestreaming scenes. Experiment 2 used a two-by-two completely randomized design to confirm that a sense of financial constraint reduces consumers’ browsing preference for artificially constructed livestreaming scenes and reduces the mediating and moderating roles of flow experience on the sense of financial constraint and consumers’ browsing preference for artificially constructed scenes. This study not only enriches the related research on the sense of financial constraint in the field of consumer psychology but also complements and improves the research on e-commerce livestreaming and provides certain reference suggestions for e-commerce enterprises’ scene selection and consumers’ pursuit of individual happiness.
Subvoxel control of fiber orientation via multidirectional shearing in 3D printing
Authors: Seta Berin , Brander Marco , Sandberg Michael , Mollah Md. Tusher , Kumar Vipin , Spangenberg Jon 
Published: September 2024

Abstract

Anisotropy, the characteristic of materials exhibiting different properties based on their direction1,2,3,4, is widespread in nature. Conventional manufacturing techniques5 often fall short in recreating such complex, localized anisotropy6,7,8. On the other hand, 3D printing allows for precise fiber deposition when producing anisotropic composites9,10,11,12. However, current methods are not able to produce fiber configurations in all three directions on a strand level, preventing full replication of the intricate anisotropy found in natural materials. To address this, we present a novel technique that provides subvoxel control using multidirectional shearing through nozzle rotation and inclination in the material extrusion additive manufacturing process. This approach allows for uniquely manipulated microstructures within a strand, indistinguishable to the naked eye. We outline the re-orientation mechanisms of fibers and demonstrate through experiments and computational simulations the effects of different process parameters on fiber configurations. This includes scenarios with fibers transversal to the print direction and local near-isotropic regions. Replicating such complex anisotropy holds potential across several fields, including wearables13,14 and biomedical implants15, lightweight composite structures16, and energy storage technologies such as batteries and supercapacitors17,18.
Clinical Genetic Services in the Emilia-Romagna Region, Italy: Current Activity and Open Issues. A Mixed-Method Study
Authors: Godino Lea , Ambrosini Enrico , Barili Valeria , Graziano Claudio , Garavelli Livia , Calabrese Olga , Neri Marcella , Sangiorgi Luca , Bertonazzi Benedetta , Innella Giovanni , Turchetti Daniela , Percesepe Antonio 
Published: September 2024

Abstract

Purpose
In 2002, in the Emilia-Romagna region of Italy, a comprehensive strategic plan was developed with the aim of improving the integration and efficiency of the genetic services. Two decades later, this report aims to explore the current functioning of the regional network, with special focus on clinical genetics in the evolving scenarios. To this aim, we analyzed the activity data of the medical genetics services in the region, to identify critical issues and to propose possible improvements.
Method
This is a mixed-method study, analyzing quantitatively and qualitatively the activities of seven medical genetics services in Emilia-Romagna region. Quantitative analysis considered the number of consultations and the composition of the staff in the year 2021. Qualitative analysis examined a focus group of directors of the services through reflexive thematic analysis.
Results
A total of 14,925 counseling sessions have been delivered by the medical genetics services, staffed with 22.4 full-time equivalent clinical geneticists. A physician performed an average of 14.5 consultations per week and approximately 1166 hours of patient care per year. The clinical geneticists/inhabitants ratio was 0.54, and it is estimated that one every 278 inhabitants, on average, underwent a genetic counseling session in 2021. Qualitative analysis highlighted issues concerning patients' access to service, general organization and staff composition.
Conclusions
In order to meet the growing demand for genetic counseling services, expansion of the workforce and adjustment of current practice models are required to increase the access to genetic services and the application of test results to clinical management.
Evaluating the Role of Conservative Therapy in Cervical Spondylodiscitis: Efficacy of Medical Versus Interventional Pain Treatments
Authors: Yalçın Çiğdem , Çelik Ali Kutta , Demirtaş Oğuz Kağan 
Published: September 2024

Abstract

Background and Objective:
Spondylodiscitis is a severe infection of the spinal discs, often leading to significant morbidity and mortality. The cervical spine is a rare site for this condition due to better blood and lymphatic supply. The primary treatment goal is infection control through long-term antibiotherapy, followed by pain and functional restoration via medical, physical, and interventional therapies. Surgery is reserved for cases with progressive neurologic deficits or severe instability.
Methods
This retrospective study, approved by the Clinical Research Ethics Committee, included patients diagnosed with cervical spondylodiscitis from December 2017 to January 2023. Exclusions were thoracic/lumbar spondylodiscitis, malignancy history, severe deformities, progressive neurologic deficits, or incomplete data. Diagnosis was based on multidisciplinary evaluations, clinical history, physical examination, and various laboratory and imaging tests. Patients were divided into two groups: those receiving interventional pain treatments (Group 1) and those receiving medical pain treatments (Group 2).
Results
Out of 132 patients, 21 met inclusion criteria. The average age was 58.33 years, with a mean follow-up of 28.80 months. Interventional treatments showed superior pain reduction (NRS: 1.11 vs. 2.33, p = 0.017) and greater improvement in Neck Disability Index (NDI: 76% vs. 56.66%, p = 0.0009) compared to medical treatments. Both groups showed significant improvements in SF-12 scores and disability percentages, with no significant difference in cervical lordosis angles post-treatment.
Conclusion
Both medical and interventional pain treatments post-antibiotic therapy effectively improve pain, disability, and quality of life in cervical spondylodiscitis patients. Interventional treatments, targeting the pain source, may offer greater benefits. Further prospective studies are necessary to validate these findings and refine treatment approaches. Surgery remains crucial for select patients with specific indications.
Clinical outcomes of a minimally invasive isolated medial patellofemoral ligament (MPFL) reconstruction technique without considering bone anatomical factors in patients with patellar instability
Authors: Zhang Yongqiang , Wu Meng , Zhou Yadong , Wang Bo , Shen Yong , Yang Yalong , Li Yang , Liu Junliang , Hu Na , Yin Zhanhai , Zhang Zhao 
Published: September 2024

Abstract

Objective: The aim of this study was to demonstrate the clinical results of a minimally invasive anatomic reconstruction technique for isolated MPFL in cases of recurrent patellar instability, without consideration of Patella alta, TT-TG distance, and trochlear dysplasia.
Methods: Retrospective analysis was conducted on prospectively collected data from patients who underwent minimally invasive isolated MPFL reconstructive surgery at Norinco General Hospital between 2014 and 2019. Preoperative evaluation included assessment of the J-sign, trochlear dysplasia according to Dejour classification, patellar height using the Caton-Deschamps index (CDI), and tibial tubercle–trochlear groove (TT-TG) distance. Postoperatively, Kujala score, International Knee Documentation Committee (IKDC) score, and Tegner score were assessed. Complications such as re-dislocation of the patella, patellar fracture, hematoma formation, and knee stiffness were recorded as failure if they severely affected knee function after MPFL reconstruction.
Results: A total of 106 patients (Average age, 21.5 ±5.9 years; 68% females; mean follow-up, 7.2±1.6 years) were included. 28 individuals (26%) presented with a preoperative positive J-sign, trochlear dysplasia was observed in 102 cases (A,48%; B,22%; C,18%; D,8%). The mean CDI value was 1.18±0.16 (range,0.9-1.5); average TT-TG distance, 21.0±3.8 mm (range,10-26 mm). The final follow-up mean Kujala score was 83.2 ± 14.6 (range 40-100); mean IKDC score, 77.8 ± 12.6 (range 24 - 93); mean Tegner score, 4.0 ± 1.8 (range 1-9). Postoperative patellar instability and re-dislocation were observed in 5 patients (5%). Knee pain emerged as the most prevalent postoperative complication (17%). Joint release surgery was required for two patients experiencing postoperative knee stiffness. The Kujala score of 70 patients was ≥80, and the clinical excellent rate reached 66%. Patients with positive J-sign and severe trochlear dysplasia before surgery are more likely to have unsatisfactory results（Kujala score＜80）, and both have significant differences. However, the two anatomical factors, CDI and TT-TG value, had no statistical significance on the satisfied and unsatisfied results of Kujala scores.
Conclusion: The reconstruction of the isolated medial patellofemoral ligament has shown positive clinical results in treating patellar instability. Especially for young female patients, a minimally invasive MPFL reconstruction technique with minimal scarring leads to increased patient satisfaction. However, in cases where preoperative assessment shows a positive J-Sign and severe trochlear dysplasia, it may be necessary to consider incorporating bony procedures such as tibial tubercle osteotomy or trochleoplasty.
Directional deficits in reactive postural control during perturbations among groups of chronic ankle instability, ankle sprain coper, and healthy control
Authors: Kim Minjun , Kim Sehee , Kim Junyoung , Hopkins J. Ty , Choi Wiha , Oh Sehoon , Son S. Jun 
Published: September 2024

Abstract

Unanticipated postural control measures may better identify mechanisms of ankle sprains in real-life situations. The purpose of this study was to identify directional deficits in reactive postural control during horizontal perturbations among groups of chronic ankle instability (CAI), ankle sprain coper, and healthy control. Sixty-eight volunteers (24 CAI patients, 23 ankle sprain copers, and 21 healthy controls) participated in this study. The participants performed a single-leg stance with unanticipated horizontal perturbations in four random directions of anterior, posterior, medial, and lateral. Anterior-posterior time to stabilization (APTTS) and medial-lateral time to stabilization (MLTTS) were calculated as an indicator of reactive postural control during horizontal perturbations. A significant interaction effect of the group x perturbation directions (3 x 4) was found. Both CAI and coper groups showed longer APTTS and MLTTS during medial and lateral horizontal perturbations compared to the control group. However, no difference was found in APTTS and MLTTS during anterior and posterior horizontal perturbations between three groups. Directional deficits in reactive postural control during medial and lateral perturbations could result from reflexive sensorimotor deficits as consequences of lateral ankle sprains in the coper and CAI groups.
Efficient Resource Allocation Algorithm for Maximizing Operator Profit in 5G Edge Computing network
Authors: Liu Jing , huang yuting , Deng Chunhua , Zhang Longxin , Chen Cen , Li Keqin 
Published: September 2024

Abstract

Resource allocation in edge computing is a research hotspot and difficulty in academia and Industry. The nature like urgency and the priority of tasks are not taken into account, which is adverse to obtain a good solution. Meanwhile, 5G has the characteristics of higher network speed, high reliability, low latency, and low-power massive connections. In this article, we present a novel algorithm to solve the multi-objective resource allocation problem in 5G edge computing (EC) network, aiming to maximize the operator profit and minimize the total completion time of tasks with priorities from the perspective of service operators under time and workload constraints. The algorithm is based on the beluga whale optimization algorithm, and it utilizes three methods to update the positions of beluga whales by swimming, predating, and migrating. In addition, to enhance the ability to escape from local optima during searching the best beluga whale position, it uses centroid information to improve the process of searching the optimal position, and adds the mutation operation in the process of position updating. Simulated results show that the proposed algorithm is high efficient in terms of reducing total task completion time and improving the revenue for operators, compared with existing strategies.
How trait-based interactions shape the stability and structure of mutualistic networks
Authors: Bachmann Jan Timo , Drossel Barbara 
Published: September 2024

Abstract

Mutualistic interactions including pollination are essential for the functioning of ecosystems, but increasingly endangered due to anthropogenic disturbances. Understanding factors that affect their stability is therefore essential. We use a population dynamics model in combination with a trait-based network architecture to investigate the stability and structure of bipartite mutualistic networks. We find that pollinator specialisation increases robustness, i.e.~the proportion of surviving species, when survival is limited by pollinator competition, by low interaction strengths, or by high mortality rates. In the opposite situations, networks with more generalists are more robust. When plant-pollinator interactions depend in an asymmetric way on their trait difference, nestedness is increased compared to a model with symmetric interactions, and specialists and generalists show a different distribution in trait space. Increased nestedness is only in some situations correlated with a higher robustness, while in other situations the correlation is negative or neutral.
Diversity of hirudin and hirudin-like factor genes in the North-African medicinal leech, Hirudo troctina
Authors: Ahmed Raja Ben , Abilov Amina , Müller Christian 
Published: September 2024

Abstract

Medicinal leeches of the genus Hirudo inhabit large areas of the Palaearctic realm. The distribution range of Hirudo troctina includes the southern Iberian peninsula and the northwestern regions of Africa. H. troctina is used for medical purposes, but only very little is known about the components of its salivary gland secretion. Hirudins, bivalent inhibitors of thrombin, are probably the best known leech-derived bioactive factors. Hirudin-like factors (HLFs) represent another class of salivary gland components that share characteristic genetic and structural markers with hirudins. Some HLFs are potent thrombin inhibitors as well, whereas the biological targets of others remain obscure. Hirudin is not a single entity, but exists in at least four different variants, namely hirudin variant (HV) 1 (VV), HV2 (IT) and two subvariants of HV3 (PAYD and PAFN). Strikingly, Hirudo medicinalis comprises genes for all four variants, whereas Hirudo verbana lacks the gene for HV2 and Hirudo orientalis contains genes for both HV3 subvariants only. Differences were also observed for the distribution patterns of the HLF genes. Here we describe the identification and molecular cloning of 11 genes that encode for several putative hirudin and HLF variants in H. troctina. Three of the genes consist of exons and introns that originate from different "archetype" genes and are likely the result of recombination events. The diversity of hirudin and HLF genes in H. troctina outnumbers all other Hirudo species. The putative hirudin variants and representatives of the HLFs were expressed, purified and functionally characterized for their thrombin-inhibiting potencies.