bluuebunny/crossref_metadata_2025_split huggingface dataset:
Traction-assisted endoscopic submucosal dissection for resection of ileocecal valve neoplasia: a French retrospective multicenter case series
Authors: Yzet Clara , Wallenhorst Timothée , Jacques Jérémie , Figueiredo Ferreira Mariana , Rivory Jérôme , Rostain Florian , Masgnaux Louis-Jean , Grimaldi Jean , Legros Romain , Lafeuille Pierre , Albouys Jérémie , Subtil Fabien , Schaefer Marion , Pioche Mathieu 
Published: April 2024

Abstract
Background The ileocecal valve (ICV) is considered to be one of the most difficult locations for endoscopic submucosal dissection (ESD). The objective of this study was to evaluate the efficacy and safety of traction-assisted ESD in this situation.
Methods All patients who underwent traction-assisted ESD for an ICV lesion at three centers were identified from a prospective ESD database. En bloc and R0 rates were evaluated. Factors associated with non-R0 resection were explored.
Results 106 patients with an ICV lesion were included. The median lesion size was 50 mm (interquartile range 38–60) and 58.5% (62/106) invaded the terminal ileum. The en bloc and R0 resection rates were 94.3% and 76.4%, respectively. Factors associated with non-R0 resection were lesions covering ≥75% of the ICV (odds ratio [OR] 0.21. 95%CI 0.06–0.76; P=0.02), and involving the anal lip (OR 0.36, 95%CI 0.13–0.99; P=0.04) or more than two sites on the ICV (OR 0.27, 95%CI 0.07–0.99; P=0.03).
Conclusion Traction-assisted ESD for treatment of ICV lesions was a safe and feasible option. Large lesions and anal lip involvement appeared to be factors predictive of difficulty.
Metal-Free Synthesis of C-3-Alkoxycarbonylated 2H-Indazoles Using Alkyl Carbazates
Authors: Hajra Alakananda , Lai Dipti , Bhattacharjee Suvam , Ghosh Sumit , Sinha Subrata 
Published: April 2024

AbstractA simple, efficient, and environmentally benign method for the direct C-3-alkoxycarbonylation of 2H-indazoles using alkyl carbazates has been developed under metal-free conditions at room temperature. This current protocol represents a facile access to C-3-carboxylic ester derived 2H-indazoles with wide functional group tolerance in good to excellent yields. The mechanistic studies suggest that the reaction proceeds through a radical pathway.
Bigger Calves from Doing Higher Resistance Training
Volume?
Authors: Kassiano Witalo , Costa Bruna Daniella de Vasconcelos , Kunevaliki Gabriel , Lisboa Felipe , Tricoli Ian , Francsuel Jarlisson , Lima Luis , Stavinski Natã , Cyrino Edilson S. 
Published: April 2024

AbstractWe compared the effects of different weekly calf training sets on muscle size
changes. Sixty-one untrained young women performed a calf training program for 6
weeks, 3 d·wk–1, with differences in resistance training volume. The
participants were randomly assigned to one of the three groups: 6-SET, 9-SET,
and 12-SET weekly calf training sets. The calf raise exercise was performed in
sets of 15–20 repetitions maximum. The muscle thickness measurements of medial
gastrocnemius (MG), lateral gastrocnemius (LG), and soleus (SOL) were taken via
B-mode ultrasound. We used the sum of the three-muscle thickness as a proxy for
the triceps surae (TSSUM). The 12-SET group elicited greater
increases than the 6-SET in LG (6-SET=+ 8.1% vs. 12-SET=+ 14.3%;
P=0.017), SOL (6-SET=+ 6.7% vs. 12-SET=+ 12.7%; P=0.024), and
TSSUM (6-SET=+ 6.9% vs. 12-SET=+ 12.0%; P=0.005), but
there was no significant difference in MG changes (6-SET=+ 6.6% vs.
12-SET=+ 9.9%; P=0.067). There were no significant differences when
comparing 9-SET vs. 6-SET and 12-SET (P≥0.099). Although all groups
experienced calf muscle hypertrophy, our results suggest that the higher dose
range may optimize triceps surae muscle size gains.
Synthesis of a Potential Precursor (Northern Fragment) for the Cyclic Depsipeptides Vioprolides A and C
Authors: Bach Thorsten , Reineke Noé Osorio , Grab Hanusch A. 
Published: April 2024

AbstractThe synthesis of a potential northern fragment for the cyclic depsipeptides vioprolide A and vioprolide C is accomplished. The prepared compound is a pentapeptide and displays the non-canonical amino acid dehydrobutyrine (Dhb) at its C-terminal end. The central position is taken by another non-canonical amino acid, (2S,4R)-4-methylazetidine carboxylic acid (Maz). A route to enantiopure N-Boc-protected Maz (N-Boc-Maz) is developed from l-pyroglutamic acid, and this building block is taken into thiopeptide formation at its C-terminal end by successively coupling serine and threonine fragments. The C-terminal threonine is dehydrated to Dhb before attaching a d-Leu-Ala dipeptide to the N-terminal site of Maz. Several intermediates are directly telescoped into the next reaction step. Starting from N-Boc-Maz, the assembly of the pentapeptide is complete in eight steps with an overall yield of 16%.
Percutaneous Biliary Endoscopy: History, Indications, Techniques, and Outcomes
Authors: Naganatanahalli Manisha , Desai Deven , Levitin Abraham , Partovi Sasan , Guan Justin 
Published: April 2024

AbstractPercutaneous biliary endoscopy (PBE), also known as cholangioscopy, represents a significant advancement in the field of interventional radiology. This technique offers a minimally invasive alternative to traditional surgery or peroral approaches for a range of biliary diseases, including stone clearance, biliary stricture/mass evaluation, and biopsies, making it particularly valuable in the management of complex biliary pathologies. It is especially significant for patients with anatomical variations or high surgical risk, where traditional approaches like endoscopic retrograde cholangiopancreatography, or surgical options, are not feasible. This article delves into the evolution, indications, technical nuances, and clinical outcomes of PBE, integrating comprehensive data from extensive research.
Minimally Invasive Management of Complicated and Re-operative Crohn's Disease
Authors: Kinford Conor , Poylin Vitaliy 
Published: April 2024

AbstractMinimally invasive techniques for the surgical management of Crohn's disease have become the recommended approach for initial surgical intervention in noncomplicated patients as there is lower morbidity for patients without compromising treatment outcomes. There has been a push to expand minimally invasive approaches to complex and recurrent diseases, trying to benefit these difficult patients. However, until recently there have been little data to support the adoption of minimally invasive surgery (MIS) in these scenarios. This article aims to build on the 2019 Clinics in Colon and Rectal Surgery article on complex Crohn's and MIS by introducing new data in support of these approaches. Decisions for technique should be based on patient characteristics, but minimally invasive techniques have emerged as valid and possibly superior for complex and recurrent disease.
Neuroprotective Potential of Hygrophila auriculata Targeting Oxidative Stress-Mediated Deficits in Streptozotocin-Induced Sciatic Nerve Injury
Authors: Jadhav Vishal B. , Vaghela Jai Singh 
Published: April 2024

Abstract
Objective Diabetic neuropathy, a microvascular complication of diabetes, affects 50% of individuals. Addressing this challenge is challenging due to its poorly understood origin and existing therapeutic approaches. This study used a methanolic extract from Hygrophila auriculata (MEHA) to treat oxidative stress-induced sciatic nerve injury in diabetic rats.
Materials and Methods A study was conducted to assess the nociceptive reflex after a single streptozotocin (STZ) (45 mg/kg intraperitoneal.) injection. The rats were divided into six groups (n = 6 rats per group). Group I nondiabetic (ND) rats received oral gavage of 1% carboxymethyl cellulose (CMC). The diabetic rats in groups II to VI were given 1% CMC, 100, 200, and 400 mg/kg of MEHA, and 180 mg/kg of metformin (MET). The freshly prepared 1% (w/v) CMC suspension of both MEHA and MET was administered over a 4-week period, commencing from the 28th day through the 56th day post-STZ injection. The impact of STZ-induced sciatic nerve injury was analyzed through the estimation of serum glucose and glycohemoglobin levels, paw withdrawal and tail-flick latencies, oxidative stress markers, and neural histoarchitecture.
Results Diabetic (STZ) control group II showed significantly altered serum glucose and glycohemoglobin levels, a reduced paw withdrawal threshold, and reduced paw withdrawal and tail-flick latencies in contrast to ND group I. Furthermore, increased oxidative stress in the sciatic nerve correlates with a reduced nociceptive threshold and disrupted neural histoarchitecture in diabetic rats. These behavioral, biochemical, and molecular changes were markedly and dose-dependently reduced by MEHA and MET treatments.
Conclusion The antioxidant efficacy of MEHA modulated oxidative stress in STZ-sensitized diabetic rats and corrected neuropathic pain by attenuating hyperglycemia.
Social participation and its gender differences among ethnic minority elders after poverty alleviation relocation (Linxia, China)
Authors: Zhang Ziyao , Feng Lin 
Published: April 2024

AbstractThe implementation of the poverty alleviation relocation policy in northwestern minority areas of China has had a significant impact on the production and living spaces of residents. Our investigation and research have shown that the social participation of ethnic minorities is influenced not only by their social and cultural norms but also to a large extent by public policies. China’s policy of relocating people to alleviate poverty has indirectly affected the social participation of elderly ethnic minorities through the relocation of households and the reconstruction of community living spaces and infrastructure. On the one hand, the family production of elders has decreased significantly, while the number of elders participating in housework and leisure activities has increased. On the other hand, although the relocation has accelerated the modernization process in ethnic minority areas, the market work of elders who aged over 50 has not increased much to compensating the job losses. As a result, the overall productivity of the elderly has declined, and their social participation has weakened. Elderly men have been more affected by social changes than elderly women and have borne more adaptation pressures. There are significant differences in leisure activities between elderly men and women. Ethnic and religious activities have remained largely unchanged, while social activities are insufficient and may not promote good health. It is important to encourage elderly individuals, particularly men, to acquire marketable skills and assist them in finding employment. Additionally, promoting social activities for elder individuals can help create a more harmonious community.
Advancement of Langmuir probe-based laser photo-detachment technique for negative ion density measurement in a high-power helicon plasma source
Authors: Mukhopadhyay D. , Bandyopadhyay M. , Tyagi H. , Patel K. 
Published: April 2024

In the pursuit of precise diagnostics for measuring negative ion density in a helicon plasma source (HPS), a new approach utilizing a radio frequency (RF) broadband transformer-based Langmuir probe is developed specifically for laser photo-detachment (LPD) analysis. This inductively coupled LPD technique is useful for high power RF systems in which capacitive RF noise is in the same scale as the pulsed photo-detachment signal. The signal acquired by this transformer-based probe is compared against the conventional Langmuir probe-based LPD technique, revealing a remarkable enhancement in signal fidelity through an improved signal-to-noise ratio (SNR) achieved by the RF broadband transformer methodology. In addition, the localized hydrogen negative ion density measurements obtained through this probe are harmoniously aligned with the line-averaged negative ion density derived from the cavity ringdown spectroscopy (CRDS) technique. These concurrence measurements highlight the RF broadband transformer-based approach’s accuracy in capturing localized negative ion density during helicon mode operation in an HPS setup. Furthermore, the correlation of negative ion density values with RF input exhibits a consistent trend in tandem with background plasma density. Notably, both CRDS and LPD measurements ascertain negative ion densities ranging from ∼5 to 6×1016 m−3 under an RF power of 500–700 W and a pressure of 8 × 10−3 mbar, all under the influence of a 55 G axial magnetic field. These specific parameters represent the optimal operational configuration for effective negative ion production with the present experimental HPS setup. Due to its better SNR, the RF broadband transformer-based Langmuir probe emerges as a useful tool for LPD diagnostics, particularly in the presence of pervasive RF noise.
Culturas juveniles como catalizador de la pragmaticalización de los marcadores tipo y
onda en Argentina y México
Authors: Mihatsch Wiltrud , Vazeilles Ana 
Published: April 2024

Abstracta
En distintas variedades latinoamericanas del español existe una serie de marcadores pragmáticos propios de la
oralidad coloquial que cumplen funciones similares. Los marcadores tipo y onda son atenuadores,
pero también tienen un valor de aproximación, ejemplificación, focalización, estructuración discursiva y pueden funcionar como
marcadores de cita. Las funciones pragmáticas se pueden datar a partir de la segunda mitad del siglo XX, se establecen en los años
ochenta y noventa, y en la actualidad siguen, en su mayor parte, asociadas al lenguaje juvenil. Al mismo tiempo, datos aislados
sugieren el contexto de las contraculturas de los años sesenta y setenta como probable catalizador que lleva a la
pragmaticalización. Proponemos un estudio comparativo de los usos en la variedad argentina y la variedad mexicana mediante un
análisis de corpus y una encuesta en el marco de la “lingüística popular” que toma en cuenta las estimaciones metalingüísticas de
los hablantes acerca del origen de los marcadores.
Constant velocity physical warp drive solution
Authors: Fuchs Jared , Helmerich Christopher , Bobrick Alexey , Sellers Luke , Melcher Brandon , Martire Gianni 
Published: April 2024

Abstract
Warp drives are exotic solutions of general relativity that offer novel means of transportation. In this study, we present a solution for a constant-velocity subluminal warp drive that satisfies all of the energy conditions. The solution involves combining a stable matter shell with a shift vector distribution that closely matches well-known warp drive solutions such as the Alcubierre metric. We generate the spacetime metric numerically, evaluate the energy conditions, and confirm that the shift vector distribution cannot be reduced to a coordinate transformation. This study demonstrates that classic warp drive spacetimes can be made to satisfy the energy conditions by adding a regular matter shell with a positive ADM mass.
Thermal defocus-free Hartmann Wavefront Sensors for monitoring aberrations in Advanced Virgo
Authors: Aiello Lorenzo , Palma Pier Paolo , Lorenzini Matteo , Cesarini Elisabetta , Cifaldi Maria , Di Fronzo Chiara , Lumaca Diana , Minenkov Yury , Nardecchia Ilaria , Rocchi Alessio , Taranto Claudia , Fafone Viviana 
Published: April 2024

Abstract
Earth-based gravitational waves interferometric detectors are shot-noise limited in the high-frequency region of their sensitivity band. While enhancing the laser input power is the natural solution to improve on the shot noise limit, higher power also increases the optical aberration budget due to the laser absorption in the highly reflective coatings of mirrors, resulting in a drop of the sensitivity of the detector. Advanced Virgo exploits Hartmann Wavefront Sensors (HWSs) to locally measure the absorption-induced optical aberrations by monitoring the optical path length change in the core optics. Despite the very high sensitivity of Hartmann sensors, temperature fluctuations can cause a spurious curvature term to appear in the reconstructed wavefront due to the thermal expansion of the Hartmann plate, that could affect the accuracy of the aberration monitoring. We present the implementation and validation of a control loop to stabilize the Advanced Virgo HWS temperature at the order of

Δ
T
⩽
0.01

K, keeping the spurious curvature within the detector’s requirements on wavefront sensing accuracy.
The internal ballistics of a spring gun
Authors: Ivchenko Vladimir 
Published: April 2024

Abstract
We consider the features of pellet motion under the elastic force acting from a decompressing spring of a finite mass. The muzzle speed of the pellet decreases as the ratio between spring and pellet mass increases. In the general case, the pellet loses contact with the spring as it is stretched. This effect occurs due to the fact that the peak of elastic displacement wave, propagating from the fixed end, reaches the opposite end of the spring. With a large relative mass of the pellet, it accelerates along a quarter of the sinusoid. At the limit of a very small pellet mass, it moves nearly all the time along with the end of the spring at an almost constant speed, approximately equal to the speed of sound propagation in the spring. In this case, after the initial compression, the pellet passes the equilibrium position, and comes off after moving a similar distance beyond the equilibrium.
Photonic quasi-crystal fiber electro-optical modulator
Authors: She Kang , Sheng Guo , Shan Zhengping , Xu Piaorong , Liu Exian 
Published: April 2024

Abstract
The integration of graphene with optical fiber is considered to be a new interdisciplinary research hotspot for functional fiber. In this paper, an electro-optical modulator based on a six-fold Stampfli-type photonic quasi-crystal fiber (PQF) is theoretically proposed with a sandwiched graphene/hexagonal boron nitride/graphene (Gr/hBN/Gr) film covering all the hole walls. This design exhibits a strong light-graphene interaction with an excellent modulation depth of ∼64 dB mm−1 at 1550 nm by applying an external bias voltage (below 30 V) on both graphene layers. As the Fermi level of the graphene changes with voltage, the fiber shows ‘On’ and ‘Off’ states, serving well as a light-switch. For the modulator performance, the dependence of modulation depth on multiple factors is studied in terms of the layer numbers of graphene and hBN films, the incident wavelength, and the structure parameters. Interestingly, an attenuation peak occurs due to the epsilon-near-zero effect in graphene and shows a linear relationship between the wavelength and the Fermi level. This design provides a guidance for the integration of PQF and graphene, and holds great promise for future all-fiber systems.
Small sample uncertainty evaluation of industrial robot position accuracy measurement based on grey model
Authors: Cheng Yinbao , Zhu Yanlong , Gao Hongtang , Li Yaru , Jiang Wensong , Luo Zai 
Published: April 2024

Abstract
The measurement of position accuracy of industrial robots has high complexity, and its uncertainty assessment is one of the important research topics. This study analyses the principle of measuring the position accuracy of industrial robots by laser tracker, the evaluation model of the measurement uncertainty of the position accuracy of industrial robots is established, and various factors affecting the measurement results are analysed, including industrial robot itself, the measurement instrument, the measurement personnel, the measurement strategy and the data processing method. There is a very small sample problem in the uncertainty evaluation process of the position accuracy of industrial robots. The literature and experiments show that the reliability of The Guide to the Expression of Uncertainty in Measurement is low under the condition of very small sample. In this study, an improved grey method is proposed to evaluate the uncertainty. The principle of the improved grey method is discussed in detail, and the general steps of the improved grey method are summarized. The experimental data prove that the standard deviation of very small sample calculated by the improved grey method has higher accuracy. Taking the position accuracy of an industrial robot measured by a laser tracker as an example, the improved grey method is successfully applied to the measurement uncertainty evaluation of the position accuracy of industrial robots.
The research on triple-coil inductive debris sensor with electromagnetic shielding
Authors: Ren Yi Jun , Gao Sheng Wei , Wen Xiao Long , Liu Yong Bin , Ju Bin 
Published: April 2024

Abstract
A high sensitivity inductive debris sensor is of great significance for oil condition monitoring and the fault diagnosis of mechanical equipment. However, inductive sensors are susceptible to interference from external electromagnetic fields. In this study, an inductive debris sensor with a shielding layer is studied, which can effectively reduce the influence of external magnetic fields on the sensor. Theoretical and experimental results verify the effectiveness of the shielding layer, and also show that the shielding layer impacts the magnetic field of the sensor, resulting in a decrease in the amplitude of the output signal. Detailed analysis was conducted to investigate the effect of structural parameters on the performance of inductive sensors. These parameters include the distance between the shielding layer and the coils, the thickness of the shielding layer, and the shielding layer material. Based on the theoretical and experimental results, reference suggestions are provided for the design of the shielding layer. This study ensures the performance and reliability of inductive sensors in practical applications.
A phase modulation method of sine signal for dual-active-valve piezoelectric pump
Authors: Sun Yeming , Deng Lingying , Wang Liang , Wang Junyao 
Published: April 2024

Abstract
A phase modulation method with wide range and high resolution for the sine signal is essential for dual-active-valve piezoelectric pump (DAVPP) control. In DAVPP, by phase modulation, the flow direction can be changed and the output flow rate and pressure can be precisely adjusted. In this article, the authors developed a phase modulation method for the sine signal. This method is characterized by both the combination of hardware and software, and the combination of digital circuits and analog circuits. In hardware, a sinxcosϕ constructing circuit and a cosxsinϕ constructing circuit are specially structured, which enables phase modulation to be achieved. In software, the output phase is determined by the digital controlling quantities sent by the main control chip and stored in the form of a table. Analytical formulas for the cosine constructing table tab_cos and the sine constructing table tab_sin are analyzed and structured. Experimental results show that the output phase can be regulated linearly and continuously, within a range of 0°–360°. Its resolution can be improved according to the requirements. Although the modulation process and circuit are simple, it can effectively solve the problem of sine signal phase modulation for DAVPP control.