bluuebunny/crossref_metadata_2025 huggingface dataset:
Comparison of Peripheral Nerve Conventional and Pulse Radiofrequency Applications in Patients with Primary Trigeminal Neuralgia: A Retrospective Analysis
Authors: ŞENTÜRK İlteriş Ahmet , GÖNÜLLÜ Edip
Published: October 2023

Aim: This study aims to retrospectively investigate the results of continuous radiofrequency (CRF) and pulsed radiofrequency (PRF) applications to the peripheral branches of the trigeminal nerve in patients with trigeminal neuralgia (TN).

Material and Methods: Patients who experienced a significant reduction in pain symptoms after local anesthetic application to the peripheral branches of the trigeminal nerve were divided into two groups. The first group received PRF treatment and the second group received CRF treatment. Pain intensity scores of both groups at 1 and 3 months were compared. The results were analyzed retrospectively.

Results: Among the participants, 10 received PRF treatment and another 10 received CRF treatment. At the 1st month follow-up, both groups demonstrated considerable reductions in pain levels. By the 3rd month, no substantial disparities were noted between the two groups in terms of pain-related disability and pain intensity.

Conclusion: Both PRF and CRF interventions emerge as effective and secure techniques applicable to the peripheral branches of the trigeminal nerve. They should be contemplated as valuable options in cases where conventional medical treatments fall short in delivering adequate pain control.
DIGITAL EMPLOYEE EXPERIENCE AND ORGANIZATIONAL PERFORMANCE: A STUDY OF THE TELECOMMUNICATIONS SECTOR IN OMAN
Authors: Porkodi S. , Al Balushi Shahla Said Khamis , Al Balushi Marwa Khalid Mohammed , Al Hadi Khulood Othman Rashid , Al Balushi Zulfa Is’haq Murad
Published: October 2023

Purpose – The study aims at assessing the effect of digital employee experience on organisational performance, particularly in the telecommunications sector in the Sultanate of Oman, using quantitative and qualitative analysis.
Research methodology – The techniques used in this empirical research include scientific literature analysis, correlation analysis, multiple regression, and sentiment analysis.
Findings – The results indicate that organisational performance has a higher association with elements of the digital employee experience like work environment, organisational culture, training availability, technology accessibility, digital tool usability, and leadership support and is statistically significant at the 5% level. Also, 80% of respondents were favourable or indifferent about their digital experience.
Research limitations – The study exclusively covers Oman’s telecoms industry and six important digital employee experience elements, so additional factors and industries may be examined further. A direct interview may improve findings since self-reported responses from individuals with demanding work schedules may be biased.
Practical implications – Telecommunication companies must increase their efforts to engage employees in the use of digital tools and encourage their employees to utilise the different digital technologies.
Originality/Value – The study investigated the six elements of the digital experience of telecom employees and its impact on organisational performance with multiple regression and sentiment analysis.
Finding Substructures in Protostellar Disks in Ophiuchus
Authors: Michel Arnaud , Sadavoy Sarah I. , Sheehan Patrick D. , Looney Leslie W. , Cox Erin G. , Tobin John J. , van der Marel Nienke , Segura-Cox Dominique M.
Published: October 2023

High-resolution, millimeter observations of disks at the protoplanetary stage reveal substructures such as gaps, rings, arcs, spirals, and cavities. While many protoplanetary disks host such substructures, only a few at the younger protostellar stage have shown similar features. We present a detailed search for early disk substructures in Atacama Large Millimeter/submillimeter Array 1.3 and 0.87 mm observations of ten protostellar disks in the Ophiuchus star-forming region. Of this sample, four disks have identified substructure, two appear to be smooth disks, and four are considered ambiguous. The structured disks have wide Gaussian-like rings (σ

R
/R
disk ∼ 0.26) with low contrasts (C < 0.2) above a smooth disk profile, in comparison to protoplanetary disks where rings tend to be narrow and have a wide variety of contrasts (σ

R
/R
disk ∼ 0.08 and C ranges from 0 to 1). The four protostellar disks with the identified substructures are among the brightest sources in the Ophiuchus sample, in agreement with trends observed for protoplanetary disks. These observations indicate that substructures in protostellar disks may be common in brighter disks. The presence of substructures at the earliest stages suggests an early start for dust grain growth and, subsequently, planet formation. The evolution of these protostellar substructures is hypothesized in two potential pathways: (1) the rings are the sites of early planet formation, and the later observed protoplanetary disk ring–gap pairs are secondary features, or (2) the rings evolve over the disk lifetime to become those observed at the protoplanetary disk stage.
Clustering Properties of Intermediate and High-mass Young Stellar Objects*
Authors: Vioque Miguel , Cavieres Manuel , González Michelangelo Pantaleoni , Ribas Álvaro , Oudmaijer René D. , Mendigutía Ignacio , Kilian Lena , Cánovas Héctor , Kuhn Michael A.
Published: October 2023

We have selected 337 intermediate- and high-mass young stellar objects (YSOs; 1.5–20 M
⊙) well-characterized with spectroscopy. By means of the clustering algorithm HDBSCAN, we study their clustering and association properties in the Gaia DR3 catalog as a function of stellar mass. We find that the lower-mass YSOs (1.5–4 M
⊙) have clustering rates of 55%–60% in Gaia astrometric space, a percentage similar to that found in the T Tauri regime. However, intermediate-mass YSOs in the range 4–10 M
⊙ show a decreasing clustering rate with stellar mass, down to 27%. We find tentative evidence suggesting that massive YSOs (>10 M
⊙) often (yet not always) appear clustered. We put forward the idea that most massive YSOs form via a mechanism that demands many low-mass stars around them. However, intermediate-mass YSOs form in a classical core-collapse T Tauri way, yet they do not appear often in the clusters around massive YSOs. We also find that intermediate- and high-mass YSOs become less clustered with decreasing disk emission and accretion rate. This points toward an evolution with time. For those sources that appear clustered, no major correlation is found between their stellar properties and the cluster sizes, number of cluster members, cluster densities, or distance to cluster centers. In doing this analysis, we report the identification of 55 new clusters. We tabulated all of the derived cluster parameters for the considered intermediate- and high-mass YSOs.
Observational Characteristics of Radiation-mediated Shocks in Photospheric Gamma-Ray Burst Emission
Authors: Samuelsson Filip , Ryde Felix
Published: October 2023

Emission from the photosphere in gamma-ray burst jets can be substantially affected by subphotospheric energy dissipation, which is typically caused by radiation-mediated shocks. We study the observational characteristics of such emission, in particular the spectral signatures. Relevant shock initial conditions are estimated using a simple internal collision framework, which then serve as inputs for a radiation-mediated shock model that generates synthetic photospheric spectra. Within this framework, we find that if the free fireball acceleration starts at r
0 ∼ 1010 cm, in agreement with hydrodynamical simulations, then the typical spectrum consists of a broad, soft power-law segment with a cutoff at high energies and a hardening in X-rays. The synthetic spectra are generally well fitted with a standard cutoff power-law (CPL) function, as the hardening in X-rays is commonly outside the observable energy range of current detectors. The CPL-fits yield values for the low-energy index, α, and the peak energy, E
peak, that are centered around ∼ −0.8 and ∼220 keV, respectively, similar to typical observed values. We also identify a nonnegligible parameter region for what we call optically shallow shocks: shocks that do not accumulate enough scatterings to reach a steady-state spectrum before decoupling and thereby produce more complex spectra. These occur for optical depths

τ
≲
55

u

u

−
2

, where u

u
= γ

u

β

u
is the dimensionless specific momentum of the upstream as measured in the shock rest frame.
VERTICO. VII. Environmental Quenching Caused by the Suppression of Molecular Gas Content and Star Formation Efficiency in Virgo Cluster Galaxies
Authors: Brown Toby , Roberts Ian D. , Thorp Mallory , Ellison Sara L. , Zabel Nikki , Wilson Christine D. , Bahé Yannick M. , Bisaria Dhruv , Bolatto Alberto D. , Boselli Alessandro , Chung Aeree , Cortese Luca , Catinella Barbara , Davis Timothy A. , Jiménez-Donaire María J. , Lagos Claudia D. P. , Lee Bumhyun , Parker Laura C. , Smith Rory , Spekkens Kristine , Stevens Adam R. H. , Villanueva Vicente , Watts Adam B.
Published: October 2023

We study how environment regulates the star formation cycle of 33 Virgo Cluster satellite galaxies on 720 pc scales. We present the resolved star-forming main sequence for cluster galaxies, dividing the sample based on their global H i properties and comparing to a control sample of field galaxies. H i–poor cluster galaxies have reduced star formation rate (SFR) surface densities with respect to both H i–normal cluster and field galaxies (∼0.5 dex), suggesting that mechanisms regulating the global H i content are responsible for quenching local star formation. We demonstrate that the observed quenching in H i–poor galaxies is caused by environmental processes such as ram pressure stripping (RPS), simultaneously reducing the molecular gas surface density and star formation efficiency (SFE) compared to regions in H i–normal systems (by 0.38 and 0.22 dex, respectively). We observe systematically elevated SFRs that are driven by increased molecular gas surface densities at fixed stellar mass surface density in the outskirts of early stage RPS galaxies, while SFE remains unchanged with respect to the field sample. We quantify how RPS and starvation affect the star formation cycle of inner and outer galaxy disks as they are processed by the cluster. We show both are effective quenching mechanisms, with the key difference being that RPS acts upon the galaxy outskirts while starvation regulates the star formation cycle throughout disk, including within the truncation radius. For both processes, the quenching is caused by a simultaneous reduction in the molecular gas surface densities and SFE at fixed stellar mass surface density.
Solar–Stellar Connection: X-Ray Flares to Energetic (E > 10 MeV) Particle Events
Authors: Kahler S. W. , Ling A. G.
Published: October 2023

Energetic particle environments are an important factor for the viability of life on exoplanets surrounding flare stars. In the heliosphere, large gradual solar energetic (E > 10 MeV) particle (SEP) events are produced by shocks from fast coronal mass ejections (CMEs). Extensive observations of solar X-ray flares, CMEs, and SEP events can provide guidance for flare star models of stellar energetic particle (StEP) events, for which stellar flares, but only rarely the associated CMEs, are observed. Comparing an extensive list of peak fluxes, timescales, and peak temperatures of 585 ≥ M3.0 solar X-ray flares with the occurrence of associated SEP events of peak flux Ip > 1.4 proton flux units, enhanced with proxy decametric–hectometric type II radio bursts, we determine guidelines for StEP event outcomes, given only stellar X-ray flare inputs. Longer timescales and lower peak temperatures of X-ray flares with a given peak X-ray flux Fp are more favorable for occurrence of associated SEP/StEP events, which, however, are only a minority of all solar flare outcomes. Most solar flares do not result in SEP events, invalidating scaling laws between stellar flares, CMEs, and StEP events. We discuss recent observations and models of the flare–CME relationship and suggest that StEP intensities Ip may often be overestimated.
Fast Radio Bursts Generated by Coherent Curvature Radiation from Compressed Bunches for FRB 20190520B
Authors: Cui Xiang-han , Wang Zheng-wu , Zhang Cheng-min , Niu Chen-hui , Li Di , Zhang Jian-wei , Wang De-hua
Published: October 2023

The radiation mechanism of fast radio bursts (FRBs) has been extensively studied, but still remains elusive. Coherent radiation has been identified as a crucial component in the FRB mechanism, with charged bunches also playing a significant role under specific circumstances. In the present research, we propose a phenomenological model that draws upon the coherent curvature radiation framework and a magnetized neutron star, taking into account the kinetic energy losses of outflow particles due to inverse Compton scattering (ICS) induced by soft photons within the magnetosphere. By integrating the ICS deceleration mechanism for particles, we hypothesize a potential compression effect on the particle number density within a magnetic tube/family, which could facilitate achieving the necessary size for coherent radiation in the radial direction. This mechanism might potentially enable the dynamic formation of bunches capable of emitting coherent curvature radiation along the curved magnetic field. Moreover, we examine the formation of bunches from an energy perspective. Our discussion suggests that within the given parameter space, the formation of bunches is feasible. Finally, we apply this model to FRB 20190520B, one of the most active repeating FRBs discovered and monitored by FAST. Several observed phenomena are explained, including the basic characteristics, frequency downward drifting, and bright spots within certain dynamic spectral ranges.
A new species of the genus Proutia Tutt (Lepidoptera, Psychidae) from Korea, based on morphology and DNA barcodes
Authors: Lee Dong-June , Lee Jae-Seok , Kim Jongwon , Lee Hyeon , Byun Bong-Kyu , Roh Seung Jin
Published: October 2023

The genus Proutia Tutt, 1899 (Lepidoptera, Psychidae) comprises 14 species found throughout the world. In East Asia, three species, Proutia chinensis Hättenschwiler & Chao, 1990, P. maculatella Saigusa & Sugimoto, 2014 and P. nigra Saigusa & Sugimoto, 2014, are known from Korea, Japan and China.

Proutia cornucervae Roh & Lee, sp. nov. is newly recognised from Korea. In addition, Bruandella niphonica (Hori) is transferred to genus Proutia. Male and genitalia of the species are described and DNA barcodes are provided.
Managing invasive wild boars in Southern Brazil’s protected areas: Challenges and strategies
Authors: Etges Matheus Fragoso , Guadagnin Demétrio Luis , Kindel Andreas
Published: October 2023

Invasive species pose significant threats to ecosystems and biodiversity, necessitating effective management strategies to mitigate their impacts. One such invasive species of concern is the wild boar in Brazil, which has the potential to cause widespread environmental changes. A national plan for monitoring and controlling invasive species, including the wild boar, was developed in response to this threat. Despite this initiative, uncertainties persist regarding the presence of wild boars in protected areas (PAs) and the effectiveness of current management actions. This study intends to diagnose the situation of wild boars in protected areas within the southern region of Brazil, specifically focusing on their distribution, management techniques employed, and reasons for the lack of management actions. An online questionnaire was sent to 297 PAs, with 134 responding. The findings revealed that wild boars were present in 36 surveyed PAs, but management efforts were only being carried out in 14 of them. Cages and corrals were identified as the most commonly used techniques, with corn serving as the preferred bait. The study identified two primary reasons for the lack of management actions: the wild boar’s low invasion intensity and management capacity limitations. To address these challenges effectively, this study advocates for a centralized organization of management actions and emphasizes the development of materials and resources to support successful management strategies. Implementing these measures is essential to safeguard the conservation of ecosystems and vulnerable species in Brazil’s protected areas and ensure the long-term resilience of these valuable ecological assets.
The Trichoptera of Panama. XXVI. Status of the genus Protoptila (Trichoptera, Glossosomatidae)
Authors: Blahnik Roger J. , Aguirre Yusseff P. , Armitage Brian J.
Published: October 2023

The caddisfly genus Protoptila (Trichoptera, Glossosomatidae) in Panama is currently represented by 15 species, including four endemic species and 11 species also found in Costa Rica. The shared occurrences of Panamanian species with other countries in the region are minimal. Herein, we describe and illustrate a new species, Protoptila harrisisp. nov., and add one new country record, Protoptila bribri Holzenthal & Blahnik, 2006. These additions are the result of several projects conducted by the Aquatic Invertebrate Research Group at the Universidad Autónoma de Chiriquí. The Republic of Panama now has 17 species of Protoptila and 535 species of caddisflies distributed among 15 families and 56 genera.
Utilization of green ATR-FTIR spectroscopic method for quantitative analysis of Ibuprofen tablets
Authors: Fahelelbom Khairi M. S. , Saleh Abdullah , Mansour Ramez , Abujarad Rami
Published: October 2023

Aim: The aim of this study is to propose a green and nondestructive method using the ATR-FTIR method for the quantitative analysis of Ibuprofen tablet dosage forms. Herein, the technique has been validated as an alternative green tool that evades necessary sample preparation procedures required in traditional quantitative methods.

Methods: The method depends on selecting CO of the Ibuprofen stretching band in the range 1620–1750 cm-1 to quantitatively determine Ibuprofen in original samples. The pack area (AUC) from ATR-FTIR spectral scanning of samples has been determined through the first derivative measurements.

Results: The assay results indicated that no interferences between the excipients or additives and the active ingredients of the commercial tablets interferences. The linearity is excellent within the concentration range of 0.2 to 1.5 w/w % (r = 0.9994). A percentage of recoveries ranged between 99.7–10.5 which are in good agreement with the pharmacopeial percent recovery standards. The high degree of sensitivity of the technique was demonstrated by obtaining a 0.028 w/w % detection limit and a 0.1599 w/w % limit of quantification values.
Quelles villes voulons-nous pour demain ?
Authors: Bihouix Philippe
Published: October 2023

La population mondiale devient toujours plus urbaine et les métropoles ne cessent de croître dans des proportions difficilement soutenables. Quelques pistes sont ici proposées pour rendre les villes « durables » ou « neutres en carbone ». Nous devons construire mieux, au lieu de construire plus, et viser une taille stationnaire des villes. Nous devrons apprendre à prendre soin de notre héritage urbain et à le transmettre. Les villes « idéales » sont déjà là : ce sont les nôtres, qu’il faut entretenir, faire fructifier, réinvestir et adapter aux enjeux futurs.
Sauver le développement durable
Authors: Caye Pierre , Damour Franck
Published: October 2023

Notre époque souffre d’un paradoxe : le consensus autour de l’urgence écologique n’a jamais été aussi grand et les résultats des politiques mises en œuvre pour y faire face restent décevants. Ce constat conduit souvent à remettre en question l’idée de développement durable qui a inspiré la plupart de ces politiques. Pierre Caye fait un pari à contre-courant, celui de prendre au sérieux l’expression du développement durable mais en déplaçant l’accent sur le durable plutôt que sur le développement.
Pourquoi (re)lire Raymond Aron en 2023 ?
Authors: de Lapparent Olivier
Published: October 2023

Disparu il y a quarante ans, Raymond Aron mérite de continuer à être lu. À l’époque des radicalisations fréquentes, un « penseur de la modération » paraît hors-jeu. Mais son « réalisme » et sa conscience des drames de l’histoire le conduisent à proposer des actions qui allient pragmatisme et ambition. Aron nous invite à un exercice de lucidité active face à un avenir toujours plus incertain.
Le postlibéralisme catholique aux États-Unis
Authors: Chelini-Pont Blandine
Published: October 2023

Dans le monde catholique américain, le courant « postlibéral » se développe autour de figures universitaires pour soutenir le Parti républicain. Il s’agit de recréer une politique chrétienne autour des valeurs morales traditionnelles, l’instance politique se subordonnant à l’instance religieuse. En outre, ce courant de pensée cherche à étendre son influence au-delà des États-Unis, profitant du développement des mouvements populistes. Il trouve déjà un allié dans la Hongrie de Viktor Orbán.
La fausse piété contre Jean de la Croix
Authors: Cugno Alain
Published: October 2023

L’érotisme est très présent dans la poésie de Jean de la Croix. Il est pourtant impossible de faire une lecture « érotico-mystique » de son œuvre pour justifier les pratiques d’un Jean Vanier ou d’un Thomas Philippe dont on sait à quel point les liens avec le Carmel étaient puissants. C’est précisément en tenant cette ligne de crête que la ferveur authentique se distingue de la fausse piété.
El Maestro del Tríptico del Zarzoso ‘Maestro Felipe, pintor
Authors: Castaño Mireia
Published: October 2023

El Tríptico de la Natividad del Museo Nacional del Prado, procedente del convento del Zarzoso en Salamanca, constituye uno de los más refinados ejemplos de la pintura del gótico internacional castellano. Sin embargo, siempre se ha considerado una obra aislada. El presente estudio, a través del análisis de un conjunto de pinturas poco conocidas, propone sacar a este artista tanto de su aislamiento como de su largo anonimato. Gracias a la existencia de una obra firmada “Artifex philippus” podemos establecer que Maestro Felipe (alias Maestro del Tríptico del Zarzoso), tuvo una larga y brillante carrera, que se desarrolló entre Toledo y el Monasterio de Guadalupe entre 1440 y 1475 aproximadamente. Asimismo, este estudio traza estilística e iconográficamente el origen del lenguaje del artista en tierras germánicas, en el espacio entre el Medio y Alto Rin.
El Madrid de El inquilino (José Antonio Nieves Conde, 1957): Parodia de una “España de propietarios”
Authors: Deltell Escolar Luis
Published: October 2023

La presente investigación aborda el uso de la parodia en la película El inquilino de José Antonio Nieves Conde (1957). Para investigar el uso de esta estrategia artística se recurre a material inédito encontrado por los investigadores de este trabajo con la ayuda de los familiares del cineasta: un tercer final de la película. Gracias a esta documentación se observa cómo el largometraje funciona como una parodia hacia las políticas del franquismo en torno a la vivienda y, de forma indirecta y no intencionada, hacia José Luis Arrese, el ministro de Vivienda, que se sintió ofendido por el filme.
Development and Optimization of Processing Parameters of 316L Stainless Steel and Inconel 718 by Wire Feed Direct Energy Deposition/Laser Beam (W-DED/LB)
Authors: Santaolaya Javier , Sogorb Jorge , González-Barba Ignacio , Periñán Antonio , Lasagni Fernando
Published: October 2023

Within the technologies that make up Additive Manufacturing (AM), one of the ones that have taken the greatest prominence in recent times is DED (Direct Energy Deposition), particularly that of wire feedstock. The W-DED/LB technique has some benefits compared to other AM methods, such as the fabrication of relatively larger parts, repair capabilities of the damaged areas of a component, cladding of different materials on existing parts, and reduced material waste.This study describes the optimisation of processing parameters for the manufacturing stainless steel (SS316L) and Inconel 718 alloys (INC718) using W-DED/LB. This is performed by modifying processing aspects like deposition trajectories, laser power, displacement speeds of the DED head, etc, with the aim of obtaining high deposition rates and a density above 99.5%. Once the alloy systems are optimised, a characterisation campaign has been performed, which includes a series of tests as well for defectology analysis using X-ray Computed Tomography (CT). Finally, the influence of different heat treatments on the tensile behaviour is analysed.This work has developed the technology of DED assembling in a Kuka-robot, so the challenge has not only been to control the DED system, but also the communication with the robotic arm to guarantee perfect harmony between all the parts that make up the W-DED/LB system.
Developing Mixed-Mode (I/II) Fracture Resistance Curves for Asphalt Concrete Mixtures at Low Temperatures
Authors: Ghafari Sepehr , Nejad Fereidoon Moghadas
Published: October 2023

Mixed mode (I/II) loading conditions occur frequently in the asphalt layers of pavements. Therefore, a low-temperature fracture analysis based on mixed mode loading turns out to be of utmost importance. In this research, asphalt concrete (AC) mixtures were prepared using two aggregate gradations and PG58-22 bitumen. AC beams were produced by the mixtures and notch offset values of 48 mm, 75.2 mm, and 107.2 mm were fabricated in the beams in order to be tested in a modified single-edge notched beam (SE(B)) setup. The tests were carried out at two temperature levels of-5 °C and-15 °C. Using the modified SE(B) setup and capturing and processing digital imaged from the growing crack during the tests, fracture resistance curves (R-curves) in mixed mode (I/II) conditions could be constructed for each mixture. The results revealed that increasing the mode mixity and impairing the tensile mechanism in the fracture of asphalt beams could significantly contribute to higher fracture resistance of the mixtures. Mixtures with the highest mode mixity exhibited greater crack tip blunting energy by up to 25%. Similarly, energy dissipation in the unstable crack propagation zone is also increased being a desirable characteristic in post-peak performance of the mixtures.
Impact of Quantum Dots on Refractive Index of Nematic Liquid Crystal Polymer System
Authors: Mishra Krishnakant , Mani Santosh , Hadkar Sameer , Sarawade Pradip , Dubey S.K.
Published: October 2023

In the present study the effect of two quantum dots ZnS and CdSe on the Refractive Index of Nematic Liquid Crystal Polymer System (NLCPS) is investigated and compared. The measurement was performed for both the systems separately, using an Abbe Refractometer, within a temperature range of 20°C to 80°C with wavelengths in the visible spectrum. The refractive index with respect to temperature for various wavelengths was studied. We observed that the response of ZnS quantum dots dispersed in NLCPS was found to be better as compared to the CdSe system. This study may be useful for display and sensor applications.
Optimization of Sandblasting to Improve the Surface Finish of 17-4PH Parts Manufactured by SLM Using Different Laser Scanning Strategies
Authors: Giganto Sara , Martínez-Pellitero Susana , Rodríguez-Mateos Pablo , Soni Neetesh , Barreiro García Joaquín
Published: October 2023

Great advances have emerged in recent years around additive manufacturing techniques, with an increasing number of different materials (polymers, ceramics, metals). However, metal part manufacturing has always been one of the most demanded in engineering. That is due to its ability to create final functional parts with good mechanical properties. One of the most widely used technique is Selective Laser Melting (SLM). The SLM process uses a laser power source to selectively melt metal powder layer by layer. Typically, this manufacturing technique requires mechanical post-processing operations, not only to split the parts from the build-plate, but also to improve the mechanical properties and surface finish of parts or the dimensional accuracy of specific regions to ensure assembly and interchangeability. In particular, sandblasting is a method of mechanical abrasion cleaning commonly used and very useful for improving the surface topology of SLM printed parts. Besides, the laser scanning strategy used in this additive manufacturing process influences the surface quality of parts. Therefore, in this work, the sandblasting post-process has been optimized for surface roughness improving in parts printed using the most common laser scanning strategies (normal, hexagonal, concentric). The role that sandblasting pressure and time plays in the surface quality of parts, indispensable to optimize this SLM post-process, has been evaluated. Thus, surface roughness of different specimens subjected to different sandblasting parameters has been measured to optimize both values related to the laser scanning strategy used in SLM manufacturing. The material used is 17-4PH stainless steel, an alloy that presents an excellent combination of high strength and good corrosion resistance, high hardness, good thermal properties, as well as excellent mechanical properties at high temperatures. This precipitation-hardened steel has important applications in the aerospace sector, chemical and petrochemical industry, energy sector, surgical instruments, high wear components, and general metallurgy, among others.
Evaluation of Metallic Parts Defects to Determine Repair Process Strategies through Laser Metal Deposition
Authors: da Cruz Miguel O. , Afonso Daniel Gil , de Oliveira Miguel Armando Riem
Published: October 2023

With technological advances, additive manufacturing processes have been gaining prominence in several industrial areas including maintenance, repair, and overhaul (MRO) processes. A process with great potential for repairing and rebuilding metal parts is laser metal deposition (LMD) technology. Despite the high potential, LMD implementation in the repair industry is not straightforward, due to the geometry variability of parts and damages to be repaired. This paper presents a repairability study that evaluates the remaining volume of the repair of different types of damages in AISI 316L parts by LMD, and determines the most appropriate deposition strategies to adapt to the repair process. This study involves the characterization and classification of common defects in metallic parts and the development of a design of experiments, in which, given the damage geometry, volume, and location, the best repair toolpath to be adopted and the ideal parameterization for the repair process are determined. The ability to correct part damage is assessed from a geometric, mechanical and energetic approach, and explores the possibility of including LMD in an adaptive and intelligent MRO system. The result of this work establishes a new deposition strategy approach based on a modified contour-parallel deposition strategy for repairing metal parts. This study also demonstrates that in surface damage cases, a fixed point strategy is highly effective, especially when using higher laser power values and larger laser spot diameters, enabling an easier process automation. However, in edge and corner damage cases, the best repair approach is using trajectory strategies that constitute material support between deposition tracks and layers. Additionally, it is demonstrated that the corners are the most critical zones that require temperature control throughout the entire repair process.
Analyses of the Structure Formation of Constructional Complex Mixtures Developed on a Local Raw Basis and their Behaviour in a Chemically Aggressive Environment
Authors: Karamyan Hasmik , Sahakov Arkadi , Aperyan Araksya , Badalyan Marya , Baghdagyulyan Armine
Published: October 2023

The article presents the physical, mechanical (strength, density), and chemicalcharacteristics of complex M100 water-resistant mortar compositions, which include crushedlimestone (0.16–1.25 mm) and granite-crushed sand. Additionally, stone masonry mortar mixtureswith a grain size of up to 5 mm have been developed using local raw materials for the restoration ofwall constructions in building structures.The relationship between the density and chemical stabilityof the hardened samples was determined using the results of complex research on the structuringprocess of the test samples obtained with the modifiers used to improve the workability of theprocessed lime mortars.
Evolution of Structure and Dynamic of Simulated CdTe Model According to the Melting Process
Authors: Dung Tran Thanh , Dung Mai Van
Published: October 2023

CdTe model containing 9955 atoms was built and simulated by the method of molecular dynamics (MD) with the Stillinger–Weber (SW) potential. The model was obtained by heating from 300K to 3000K at a rate of 1013 K/s. The structural properties of the model are investigated through the total energy per atom, the partial radial distribution functions (PRDFs), the coordination number distributions and the bond-angle distributions. Calculation results have shown that the model has a melting point of about 1370K and changes from tetrahedral to octahedral structure when the temperature of CdTe model is above the melting point. These results are consistent with the reported experimental and simulation results. In addition, the mobility of Cd and Te atoms is also researched through the mean squared displacement (MSD) and the diffusion coefficients of Cd and Te atoms.
Generation and Characterization Metrology of Textures for Design of Urban Furniture with Recycled Material - A Case of Study for Additive Manufacturing
Authors: Rodríguez-Parada Lucía , De la Rosa Sergio , Pardo-Vicente Miguel Ángel , Méndez-Salgueiro José Ramón , Mayuet Pedro Francisco
Published: October 2023

The design process of street furniture nowadays focuses on aspects that go beyond functionality. In this type of product, total aesthetic integration with the space is sought in order to minimise aesthetic pollution. People's quality of life is directly related to the environmental, visual and sound impact of street furniture. Hence the search for sustainability through materials and finishes based on biophilic design. In the context of recycled materials, one branch of research focuses on the search for applications such as street furniture. In turn, 3D printing technology makes it possible to manufacture customised products and use recycled materials. This work focuses on the creation of organic textures for the creation of street furniture printed with recycled materials. The aim is to analyse the state of the art in this field and propose a series of textures and reliefs based on organic shapes, their manufacture by additive manufacturing of fused material (FFF) and their metrological study of the manufactured pieces with respect to the models created by computer-aided design.
Synthesis and Characterization of Shape-Stable Bio-Char Composite PCM Material for Solar Desalination Application
Authors: Ravikumar K. , Nagesh G.V. , Venkateswara Rao R. , Saikiran Amruthaluru , Swapna R. , Naidu Tulugu Gunavardhana , Hariprasad Sampatirao
Published: October 2023

In the present study, three different D-Mannitol based activated bio-char composite shape-stable phase change materials (PCM) were developed for medium temperature energy storage applications like solar desalination, solar thermal storage and waste heat recovery with varying bio-char compositions. The activated bio-char (A-BC) composite-based samples were prepared from sawdust by using the pyrolysis method. The phase composition, morphology, latent heat capacity and phase change temperature of the fabricated samples were assessed by XRD, SEM, differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy (FTIR). The fabricated bio-char composite materials exhibited good thermal properties and structural stability compared to pure PCM. The phase change material with a blend of minimum 15 wt.% activated bio-char and 85% D-Mannitol was observed to be leak resistant. FTIR and XRD results confirm that the chemical properties of the bio-char composite remain the same as the pure PCM, which confirms that there are no chemical interactions between the PCM and bio-char. PCM sample with 15% activated bio-char exhibited an enhanced thermal stability compared to the pure PCM.
A rare case of disseminated varicella zoster infection in a healthy young adult
Authors: Rathnayaka Deemantha Lalana , Jayasinghe Inoka Kumuduni , Ekanayaka Chiranjaya Bandara
Published: October 2023

No abstract available
A quality improvement project to establish accuracy in completing Early Warning Score chart and appropriate clinical response depending on the score in acute care wards at Asiri Surgical Hospital
Authors: Lochanie Nimali , Abeyasekara Kalsara  Haresh , Senanayaka Gayani
Published: October 2023

Failure or delay in recognition of acutely deteriorating patients in acute care ward setting leads to preventable morbidity, cardiac arrest, and death. Assessment and responding to Early Warning Score (EWS) adapted from National Early Warning Score 2 is implemented at Asiri Surgical Hospital to capture these patients early and escalate their care appropriately. Though a colour-coded EWS chart and a hospital policy are available, gaps in accurate recording, monitoring, and triggering were reported. Thus, a quality improvement project was conducted with the aim of establishing more than 80% accuracy in completing the EWS chart and appropriate clinical response to EWS score in acute care wards at Asiri Surgical Hospital by August 2022.A multidisciplinary team performed a series of Plan-Do-Study-Act cycles focusing on correct documentation and calculation of EWS score and appropriate monitoring and escalation of care. Key drivers for hindering the pathway were identified and addressed. Over the course of the project, correct recording improved from 81.25% to 99.4%, accurate calculation of total EWS score had improved from 79% to 88%, patients who received recommended monitoring as triggered by EWS score improved from 78.8% to 84.6% and escalation of care when EWS score is 5 or more improved from 70.9% to 91.7%.A step improvement in the clinical response to a deteriorating patient in the acute care ward setting at Asiri Surgical Hospital was attained by the successful quality improvement project involving the frontline care providers.
Study on Ward-Based Practice of Vasopressor Administration for Patients with Sepsis, in National Hospital of Sri Lanka (NHSL)
Authors: Vitharana H. S. , Amarasena Ramya
Published: October 2023

Background: Vasopressors are administrated peripherally in hemodynamically unstable patients with sepsis in the initial period. International guidelines are available for peripheral administration of vasopressors, including Surviving Sepsis guidelines 2021.Objective: Assess the ward-based practice regarding peripheral administration of vasopressors in patients with sepsis, in NHSL.Methods: A prospective cross-sectional study, during a period of six weeks in 2022, setting of Medical and surgical wards in NHSL, in a group of 52 patients.Results: Noradrenaline was the vasopressor used for all patients with septic shock. 93% of patients had peripheral noradrenaline infusions for a medium duration of 77.7 hours. Peripheral cannula for noradrenaline was sited in the forearm at 46% and in the dorsum of the hand at 34%. Only 7% had a central line for vasopressors. Other infusions along with noradrenaline in the same cannula were given in 75%. Approximately 90% were monitored hourly during the infusion of vasopressors. ICU referral was done only in 5.7% of patients. Adverse reactions were noted in 38% of patients, all minor complications.Conclusion: Peripheral administration of vasopressors was prolonged compared to standard. Adverse reactions were identified, but all were minor complications.
Myoclonus in the Post-Operative Period: A Case Report
Authors: Chandana B. , Rath Prapti , Niranjan Akshita , Narayana Sharmila , Tejesh C. A.
Published: October 2023

Involuntary movements/myoclonus are brief, short-lived jerky movements and a complication in the post-operative period are seen following central neuraxial blockade causing distress to the patient but is usually self-limiting. We wish to bring cognizance among fellow anesthesiologists regarding this possible, extremely rare complication and also review the available work for its cause and management.Post-spinal myoclonus was witnessed in a young adult patient in their twenties who underwent closed reduction and internal fixation for a right femur shaft fracture under combined spinal-epidural anaesthesia. The patient developed involuntary jerky movements of the right foot 8 hours after the subarachnoid block gradually reduced in the next 24 hours. After ruling out other possible causes of myoclonus, the case was followed up and discharged on postoperative day 5. Post spinal myoclonus though a rare complication can be distressing to the patient and the doctor. It is a self-limiting complication with no residual effects.
Prediction model for the need of postoperative organ support in an adult population undergoing elective major general surgery - Utilizing the American College of Surgeons - National quality improvement project (ACS-NSQIP) surgical risk calculator
Authors: Botejue Kavya Galle Kankanamge , Pathirana Aloka , Prathapan Shamini
Published: October 2023

An accepted model for predicting the need for postoperative organ support and intensive care, in patients undergoing elective surgery, is lacking worldwide. A reliable tool that could predict the need for postoperative organ support would facilitate the efficient utilisation of ICU beds while ensuring patient safety. The American College of Surgeons - National Quality Improvement Project (ACS-NSQIP) surgical risk calculator is validated for the prediction of the risk of serious complications in the postoperative period. We aimed to validate this calculator to predict the need for post-operative organ support. We obtained perioperative data from 126 patients who underwent elective major general surgery. We calculated the percentage risk of serious complications for each patient using the ACS-NSQIP calculator and correlated it with the level of postoperative organ support needed. The mean predicted percentage risk of serious complications, for the group that did not require any organ support was 10.5% and the group requiring 1 or more organ support was 18.1%. The standard error was 0.49 (p= 0.001). A receiver-operating characteristic (ROC) curve gave an area under the curve of 0.71. We chose a cutoff for the percentage risk of serious complications for needing postoperative organ support and 10.8% was chosen as a fair value as it had a sensitivity of 71.4% and a specificity of 66%. The percentage risk of serious complications calculated by the ACS-NSQIP surgical risk calculator has a strong positive correlation with the need for postoperative organ support. Multi-center data is needed to determine definite cut-offs.
Tolerance of Capsicum frutescens L. (Solanales: Solanaceae) to the duration of waterlogging and impact on the post-waterlogging and recovery periods
Authors: Saptiningsih Endang , Darmanti Sri , Setiari Nintya
Published: October 2023

Waterlogging is a shallow flooding in the area of the root and in some parts of the shoot. It is one of the most common types of flooding in agricultural areas. The duration of waterlogging affects plant growth and yield in response to stress by interacting with their ability to adapt. Plant adaptability during waterlogging affects their resilience to post-waterlogging and recovery conditions. In this research, we examined the tolerance of Capsicum frutescens to short (1 day), medium (3 days) and long (10 days) duration of waterlogging, as well as its implications on post-waterlogging, recovery, reproductive phase and harvest. Adaptability and growth rates were used to determine plant tolerance to waterlogging stress. The percentage of wilting, root damage, survival, stomatal response, formation of hypertrophic lenticels, adventitious roots, photosynthetic pigment content, height, leaf number, plant biomass, flower number, and fruit fresh weight were used to measure adaptability and growth. The results showed that a longer duration of waterlogging increased root damage and decreased plant growth, affecting photosynthetic pigment content, leaf number, root and shoot biomass. The ability to regulate the stomata opening, the formation of hypertrophic lenticels and adventitious roots enabled plants not to wilt permanently, surviving post-waterlogging conditions and during recovery, growing during reproductive phase and producing yields. The critical duration of waterlogging at the beginning of the vegetative phase occurred at 10 days, and pepper suffered a drastic reduction in vegetative and reproductive growth and yields. The maintenance of the root system and the development of adaptive mechanisms increased plant survival, thereby affecting yield.
Anisotension secondaire au syndrome d’apnée du sommeil : à propos de deux cas observés à Antananarivo
Authors: Ernestho-ghoud Indretsy Mahavivola , Soilihi Moustafa Abdou , Rajaonarison Ny Ony Narindra Lova Hasina , Raveloson Nasolotsiry Enintsoa , Ahmad Ahmad , Vololontiana Hanta Marie Danielle
Published: October 2023

Inter-arm blood pressure difference secondary to atherosclerosis stenosis has been rarely reported in sleep apnea syndrome, particularly from Sub-saharan Africa. In this paper, we report two cases: The first case consists of an 83-year-old man who developed left inter-arm blood pressure difference secondary to left subclavian artery atherosclerosis occlusion and chronic angina. The second case consists of 76-year-old woman followed for type 2 diabetes, who developed right inter-arm blood pressure difference secondary to right carotid artery atherosclerosis stenosis complicated by left ischemic stroke and death. The only highlighted cause was sleep apnea syndrome.

L’anisotension secondaire à une sténose ou occlusion athéromateuse était rarement décrite au cours du syndrome d’apnée du sommeil, en particulier en Afrique Subsaharienne. Dans cet article, nous rapportons deux cas cliniques : Il s’agissait d’une part d’un patient âgé de 83 ans, présentant une anisotension gauche secondaire à une occlusion athéromateuse de l’artère sous clavière gauche et d’angor chronique, et d’autre part une patiente de 76 ans, suivie pour un diabète type 2 avec une obésité, présentant une anisotension droite secondaire à une sténose carotide athéromateuse droite, compliquée d’accident vasculaire cérébral ischémique et de décès. La seule cause mise en évidence était le syndrome d’apnée du sommeil léger à modéré.