bluuebunny/crossref_metadata_2025 huggingface dataset:
Evaluation of the use of autologous platelet-rich fibrin in myringoplasty operation
Authors: Aboelnaga Heba Abdelreheem , Elsharnouby Mohammed Kamar , Ali Ayman Ali Abdelfattah , Elkamshishi Tamer Aboelyazeed , Abdelhafez Tarek Abdelrahman
Published: October 2022

Background

Platelet-rich fibrin (PRF) which is considered a second-generation platelet-rich plasma having a high content of growth factors could be implied as a sealant and adjuvant to grafting materials during tympanoplasty operation. This work aimed to evaluate the role of autologous platelet-rich fibrin as an adjuvant in type 1 tympanoplasty (myringoplasty) for the closure of central tympanic membrane perforations. A prospective comparative study was conducted including one-hundred patients with chronic suppurative otitis media with dry central TM perforations. The patients were classified into two equal groups: group A (case group) was subjected to myringoplasty operation with the use of autologous PRF added to the temporalis fascia graft, and group B (control group) was subjected to myringoplasty operation using graft only without PRF. Both groups were assessed for successful closure of perforation defined as an intact eardrum, success in terms of hearing defined as closure of air-bone gap down to 10 dB or lesser, and hearing gain at 6 months postoperatively.

Results

At 6 months postoperatively, the success rate (graft taking) in group A (90%) was significantly higher than in group B (70%). Success in terms of air-bone gap closure (< 10 dB) revealed that in group A, success was achieved in 39 patients (78%), which was significantly higher than in group B 27 patients (54 %). Air-bone gap at 6 months postoperatively was more in the graft taken cases in the case group than in the control group with a significant difference. There was a nonsignificant correlation between graft uptake and either hemoglobin or platelet concentrations in both groups. In addition, there was a nonsignificant correlation between graft uptake and the size of the perforation in both groups.

Conclusion

Platelet-rich fibrin is a cheap, cost-effective, and completely autologous platelet concentrate with enriched growth factors. It improves the overall success rate of myringoplasty with no noticeable side effects.
Endoscopic-assisted approaches for enucleation of invaded sinonasal region by benign odontogenic cysts: a case series study
Authors: Ragab Ahmed A. , Abo El Naga Heba Abdel Rahem
Published: October 2022

Background

During surgical planning for the excision of odontogenic cysts and tumors, surgeons should consider choosing the appropriate endoscopic approach to reach all parts of the maxillary sinus and cyst walls during its enucleation. Using the endoscopic trans-nasal approaches results in less than one-third of the maxillary sinus being reached regardless of antrostomy or angled instruments used. Also, the expansion process and involvement of maxillary sinuses in odontogenic cysts and tumors are variable, adding more difficulties during excision. This study aimed to assess the expansion process of large benign odontogenic cysts and tumors involving nasoantral regions and adaptability to different endoscopic approaches for enucleation. Six patients were included in this case series study. Preoperative panoramic views plain film radiography, and computed tomography scans were obtained. Lesion characteristics, relation to teeth origin, the nose, and maxillary sinus wall displacement, location of lesions about typical vertical and horizontal nasomaxillary constructions, and associated inflammation of the paranasal sinuses were evaluated. Three surgical approaches were tailored, allowing viewing and endoscopic enucleation.

Results

Four periapical (radicular) cysts, one ameloblastoma, and one calcifying epithelial odontogenic tumor, ranging in size from 3 to 5 cm, were enucleated endoscopically in patients aged 15–40 years. Intra-sinus expansion of the cyst and lesion level above the nasal floor allowed endoscopic enucleation using wide middle meatal antrostomy in 1 (17%). Lesions localized to the anterior wall and the nasal process of the maxilla permitted endonasal minimal rhinotomy approach in 1 (17%). Central lesions, cyst extension below the level of the nasal floor, and lateral wall expansion with or without anterior maxillary wall scalloping had adequate exposure using a minimal sublabial approach in four patients (67%). Together with its role in complete enucleation, endoscopy allowed associated rhinosinusitis surgical treatment in five patients (83%).

Conclusion

Tailoring surgical approaches to the expansion process allowed endoscopic enucleation of large odontogenic cysts/tumors without wall remnants. The integrity of the Schneiderian membrane was preserved, protecting the critical surrounding structures.
Gerenciamento de recursos humanos em contexto de crise: o dilema da tomada de decisão para a demissão
Authors: Pottker Daniel , Faccin Kadigia , Bittencourt Bruno Anicet
Published: October 2022

O caso tem como dilema a coordenação de um plano de reestruturação de Recursos Humanos (RH) em uma indústria metalmecânica a partir da crise provocada pela pandemia do coronavírus (Covid-19). Aurora (gerente de RH) precisa coordenar o plano levando em consideração os projetos de gestão de pessoas realizados até o momento e administrar as expectativas das partes envolvidas. O dilema envolve, de um lado, a redução de custos com a demissão de funcionários e, de outro lado, a manutenção das atividades de desenvolvimento de pessoas que vinham sendo realizadas pela área de Gestão de Pessoas.
In vitro evaluation of ruminal digestibility and fermentation characteristics of local feedstuff-based beef cattle ration
Authors: Mayulu Hamdi , Daru Taufan Purwakusumaning , Tricahyadinata Irsan
Published: October 2022

Background: Consumption of local feedstuff Neptunia plena L. Benth and Leersia hexandra Swartz as a ration by the animal subject is expected to promote cost efficiency and production, as well as provide essential nutrition needs. Therefore, this study aimed to evaluate dry matter digestibility (DMD), organic matter digestibility (OMD), ammonia (NH3) production, and volatile fatty acid (VFA) in beef cattle. Methods: Feed and rumen inoculum samples were prepared and analyzed for their proximate contents. There were five treatment groups based on the diet received by beef cattle, namely: T1 (Leersia hexandra Swartz 100 %); T2 (Neptunia plena L. Benth 100%); T3 (Leersia hexandra Swartz 15% + (Neptunia plena L. Benth 15% + 70 % Other Feedstuffs); T4 (Leersia hexandra Swartz 20% + (Neptunia plena L. Benth 20% + 60% Other Feedstuffs); T5 (Leersia hexandra Swartz 25% + (Neptunia plena L. Benth 25% + 50% Other Feedstuffs). In vitro approaches were used to determine the DMD, OMD, NH3 production, and VFA in beef cattle. The data were analyzed using ANOVA at a significance level of 95%, and a Duncan Multiple Range Test. Results: The results showed that the highest DMD (P<0.05) was derived from T 5 (56.47%), followed by T 4 (56.45%) and T 3 (55.90%). T 5=62.40% significantly (P<0.05) generated the highest OMD followed by T 4=61.95% and T 3=60.82%. This treatment had the highest NH 3 value, namely 5.02 mM, compared with T 3=4.55 mM, T 4=4.50 mM, T 2=4.22 mM, and T 1=3.99 mM. Furthermore, T5 had the highest VFA (P<0.05) compared with T 4, T 3, T 2, and T 1 with the value of 150.5, 133.0, 130.5, 130.0, and 123.5 mM, respectively. Conclusions: The local feedstuff-based ration contributed to beef cattle production.
Factors affecting the family development index in Indonesia: a cross-sectional survey in Aceh, a region with a 30 year armed conflict experience
Authors: Yani Muhammad , Puspitawati Herien , Ilzana Teuku Muhammad , Oktriyanto Oktriyanto , Damanik Rizal , Khaled Teuku Muhammad , Rahmi Cut Riska , Fathima Raisha , Anwar Samsul , Andriaty Syarifah Nora
Published: October 2022

Background: Family development index needs to be measured to ensure that the government has made optimal efforts to provide happiness to the families and to develop strategies in family development in a region with unique conditions. The objective of this study was to assess the family development index and its associated determinants in Aceh province, a region implementing Syariah Law in Indonesia with 30 years of armed conflict experience.

Methods: A cross-sectional survey was conducted in all regencies in Aceh. The study was a part of the Indonesian National Population and Family Planning Board project. The survey included one individual from each household that was selected randomly. Family development index was measured using a questionnaire consisting of 15 questions. The plausible determinants were collected and assessed through a face-to-face interview. The family development index was dichotomized using 85% cut-off into good and poor. A two-step logistic regression was used to determine the associated determinants.

Results: A total of 10,000 households were included in the final analysis. 86.6% had a good family development index, with the highest in Sabang (97.6%) and the lowest index in Aceh Singkil (76.6%), respectively. A multivariate analysis indicated that the regency, marital status, educational qualification, ownership of health insurance, ownership of childbirth certificate, quality of the house (the type of floor, the source of electricity, the source of drinking water and the type of toilet facility) were associated with the family development index.

Conclusion: Despite Aceh being one of the less developed provinces in Indonesia with long armed conflict experience, our data suggest that the family development index is relatively high and the index is influenced both by economic and non-economic determinants. To further improve the family development index, it is critical to develop both economic and non-economic components in the region and in the country.
RETRACTED: Non-intertwined strands of plasmid DNA contradict the Watson and Crick model of DNA structure [version 3; peer review: 1 approved, 1 approved with reservations, 1 not approved]
Authors: Kumar Pawan
Published: October 2022

At the request of the author, the article titled “Non-intertwined strands of plasmid DNA contradict the Watson and Crick model of DNA structure” [version 3; peer review: 1 approved, 1 approved with reservations, 1 not approved]. F1000Research 2020, 8:356 (https://doi.org/10.12688/f1000research.18134.3) has been retracted from F1000Research. Previous versions of this article published on F1000Research have also been retracted (https://doi.org/10.12688/f1000research.18134.1; https://doi.org/10.12688/f1000research.18134.2).

Since publication, Dr Pawan Kumar has performed additional experiments on the structure of a DNA molecule and was not able to generate further results that support this article. As such, they are no longer confident in the conclusions drawn in this article, and wish to retract. They apologise for any inconvenience caused
Mis on peidus sõnaraamatu tähendussoovituste tagahoovis? Eesti omasõnade käsitlus
Authors: Risberg Lydia
Published: October 2022

Vabariiklikus õigekeelsuskomisjonis arutati 1980. aastal, et eesti üldkeele omasõnade tähendusi ei ole võimalik ega vajalik normida. Sellegipoolest jätkati keelekorralduses õigekeelsussõnaraamatu kaudu osade sõnatähenduste ebasobivaks pidamist (ÕS 1999) ja nende kohta soovituste andmist (ÕS 2006–2018). Artiklis kirjeldan ÕS 2018-s eesti omasõnade tähenduste kohta antud soovituste analüüsi tulemusi, tuginedeskasutuspõhisele keeleteooriale, mille järgi sõnatähendused kujunevad keelekasutuses. Oleme EKI-s võtnud seisukoha, et EKI ühendsõnastikus üksnes kirjeldame tähendusi, mitte ei hinda neid heaks ega halvaks. Sellegipoolest otsivad paljud keelenõuküsijad ja (õigekeelsus)sõnaraamatu kasutajad vastust küsimusele, mis on keeles õige ja vale, hea ja halb. Artiklis arutlen, kas ja kuidas saab keelekorralduses sõnatähenduste kohtasoovitusi anda.

Abstract. Lydia Risberg: Recommendations for the meanings of Estonian words – necessary or not? The National Orthology Commission discussed in 1980 that there should be no norms for the meanings of Estonian words in the Estonian standard language, but the Estonian corpus planning continued to label some meanings as inappropriate and gave recommendations for meanings in the Dictionary of Standard Estonian (DSE 1999–2018). But the Dictionary of Standard Estonian and the Explanatory Dictionary of Estonian do not create word meanings – the meanings of words are formed in the use of language and dictionaries only describe the usage. The new EKI Combined Dictionary (since 2020) only describes meanings, there is no evaluation whether the meaning is good or bad. This article explains why the meanings of Estonian words cannot be standardised in general language and the recommendations for the meanings of Estonian words are not necessary.
Algorithmic Explainability and the Sufficient-Disclosure Requirement under the European Patent Convention
Authors: Rudzite Liva
Published: October 2022

Artificial intelligence and its subsector machine learning differs from traditional programming. For this reason, coupled with its potential benefits to society in many arenas, it has been articulated as one of the key priorities in the European Union. Such characteristics specific to artificial intelligence as models with increased accuracy and generalisation power may accentuate issues of algorithmic explainability that can defy patentability. Accordingly, the article focuses on the legal requirements related to the ‘sufficient disclosure’ criterion under the legal framework for patents as one facet of deciding on the patentability of the invention, and it addresses potential solutions for overcoming issues of algorithmic explainability. The author argues that solutions introducing a system involving deposit of the algorithm, training data, or both might not be as effective a mechanism for tackling those issues as instead implementing a recognised certification system.
Camonia — magiczna kraina książek. Przyczynek do badań recepcji polskich edycji księgogrodzkiego cyklu Waltera Moersa
Authors: Brzuska-Kępa Alina , Kępa Rafał
Published: October 2022

Artykuł stanowi przyczynek do badań recepcji polskich edycji księgogrodzkiego cyklu Waltera Moersa, Miasto Śniących książek i Labirynt Śniących Książek. Dokonano w nim przeglądu recenzji w periodykach, opinii czytelników w wysoko pozycjonowanych serwisach czytelniczych i ocen w księgarniach internetowych i serwisach aukcyjnych.
Zmiany typograficzne na stronach internetowych wybranych serwisów społecznościowych
Authors: Chrześcijańska Daria
Published: October 2022

Artykuł poświęcony jest typografii w projektowaniu internetowym. Zaprezentowano w nim ujęcie definicyjne, zwracając uwagę na tradycyjne pojmowanie tego pojęcia, a także rozumienie w odniesieniu do środowiska cyfrowego. Podkreślono jego znaczenie w projektowaniu internetowym, zwracając przy tym uwagę na szczególne cechy typografii w odniesieniu do web designu. W drugiej części tekstu zaprezentowano wyniki badań typografii w czterech serwisach społecznościowych: Facebook, Linkedin, Twitter oraz YouTube. Do badań wykorzystano metodę automatycznych procedur z wykorzystaniem serwisu Wayback Machine oraz dodatków do przeglądarki internetowej: WhatFont, Measure i ColorZilla. Drugą metodą jest metoda ekspercka z zastosowaniem listy autorskich kryteriów badawczych. Ustalono przy ich pomocy zmiany zachodzące w witrynach badanych serwisów na przestrzeni czasu w zakresie elementów typograficznych, nie znaleziono jednak zależności czasowych, które wskazywałyby na spójne trendy projektowe w tym zakresie.
Technologia blockchain w świadomości polskich użytkowników portalu Facebook – wyniki badań ankietowych
Authors: Wieniecki Krzysztof
Published: October 2022

Świat nowoczesnych technologii cały czas się rozwija. Technologia ma coraz większy wpływ na większość aspektów życia współczesnego świata. Z uwagi na znaczenie technologii nieustannie rośnie zapotrzebowanie na tanią technologię zapewniającą bezpieczeństwo przeprowadzenia wszelkich transakcji oraz przechowywania wrażliwych danych. Naprzeciw takim oczekiwaniom wychodzi technologia blockchain, która m. in. ze względu na szerokie spektrum zastosowań oraz odporność na ataki hakerskie zdaje się spełniać właśnie te oczekiwania. Niniejszy artykuł ukazuje istotę technologii blockchain, przedstawia jej działanie oraz role we współczesnym świecie. Celem artykułu jest przedstawienie wyników badań ankietowych, które ukazują stan wiedzy na temat technologii blockchain, jej przeznaczenie oraz potencjał w opinii Polaków. Badania zostały przeprowadzone na przełomie roku 2020 oraz 2021. Metodologia badań opierała się na metodzie sondażu diagnostycznego, w którym udział wzięło 163 użytkowników portalu Facebook. Ankieta zawierała 11 pytań, na które składały się pytania zamknięte (jednokrotnego oraz wielokrotnego wyboru) oraz otwarte (z możliwością udzielenia własnej odpowiedzi). Pytania ankietowe zostały podzielone na trzy grupy: pytania o definicje i znajomość technologii blockchain, pytania o zastosowania wspomnianej technologii oraz jej potencjał gospodarczy. Dodatkowo ankieta zawierała metryczkę danych, która posłużyła do określenia cech demograficznych respondentów (płeć, wiek, wykształcenie, miejsce zamieszkania oraz status zawodowy). Badania wykazały, iż ankietowani w większości łączyli technologie blockchain z kryptowalutami, jednocześnie nie znając odpowiedniej definicji oraz przeznaczenia dla łańcucha bloków. Tym samym użytkownicy wskazali blockchain jako technologię z potencjałem, która może w przyszłości odgrywać istotną rolę w gospodarce.
DEVELOPMENT OF A C-ELS SPECIMEN-BASED NUMERICAL BENCHMARK FOR MODE II DELAMINATION AND ASSESSMENT OF TWO VCCT-BASED PROPAGATION STRATEGIES
Authors: KRUEGER RONALD , CARVALHO NELSON V. DE
Published: October 2022

A finite element (FE) benchmark example inspired by the calibrated end-loaded split (C-ELS) specimen is developed and used to assess the performance of delamination propagation capabilities based on linear elastic fracture mechanics (LEFM). The C-ELS specimen has the advantage of a longer region of stable delamination propagation compared to the existing mode II benchmark case. The new benchmark example may therefore provide a better assessment tool by enabling more stable crack growth in regions further away from the boundary conditions or load application. First, a benchmark result is created manually using two-dimensional finite element models of the C-ELS specimen with different delamination lengths. Second, the performance of the virtual crack closure technique (VCCT) delamination propagation capabilities in the Abaqus/Standard®1 FE code and the recently developed Progressive Release eXplicit-VCCT (PRX-VCCT) method are assessed by comparing the results to the benchmark case. Two examples with different starter delamination lengths are studied. A shorter starter length is chosen to create a scenario with unstable delamination propagation. A longer delamination encourages stable delamination propagation. Detailed results from three-dimensional analyses with aligned and misaligned meshes and two levels of mesh refinement are provided. In general, good agreement can be achieved between the results obtained from the quasi-static propagation analysis and the benchmark analysis. Numerical artifacts including anomalous unreleased nodes in the crack wake and zig-zag crack fronts occur for propagation analyses using Abaqus/Standard VCCT. In comparison, continuous, smooth, delamination fronts are observed for PRX-VCCT. The use of the benchmark case to assess different VCCT-based propagation strategies illustrates the value of establishing benchmark cases.
MECHANICAL PROPERTY OF PHENOLIC RESIN VIA MOLECULAR DYNAMICS USING A REACTIVE FORCE FIELD
Authors: GALLEGOS VAN , KEMPPAINEN JOSHUA D. , ODEGARD GREGORY M.
Published: October 2022

During terrestrial atmospheric re-entry, aerospace vehicles can be subjected to temperatures greater than 1800 K which requires thermal insulation to protect the aircraft. Thermal protection systems (TPS) were developed to address this challenge with two goals in mind: (1) provide insulation to inner materials from high temperatures and (2) maintain low weight to reduce payload costs. One class of TPS materials commonly used as ablatives are carbon-carbon composites (CCCs), which consist of a carbon matrix embedded with carbon fillers. Common aerospace materials lose mechanical integrity at high temperatures, while CCCs continue to perform. The manufacturing process of CCCs is cyclic and begins with a net-shape uncured prepreg which is subjected to polymerization and carbonization via pyrolysis. Due to the shrinkage and mass loss associated with these processes, the resulting structure is subjected to several cycles of uncured resin re-impregnation, polymerization, and carbonization until a sufficiently dense structure is achieved. Carbon yield is defined as the mass remaining after carbonization divided by the mass before carbonization and is used as a metric for selecting carbon matrix precursors. A high carbon yield translates into fewer re-impregnation cycles, thus economizing the process. Phenolic resin is a common carbon matrix precursor material due to its relatively high carbon yield of 50-55%. The goal of this project is to establish molecular dynamics (MD) protocols for simulating the manufacturing process of a phenolic-derived carbon matrix. In the present work, an atomistic MD model of the polymerization of phenolic resin was simulated using a reactive force field. By using a well-known material system, resulting MD properties can be compared to experimental values for validation. Since the end goal is a carbonized product, a poly- merized phenolic structure was created using pre-polymerized monomers as the initial structures which are then crosslinked at high temperature (1000 K) via an openvalence approach. A total of 5 replicates were built to account for statistical variation. To keep track of the gelation behavior of the system, the extent of reaction is calculated using Carothers' equation for a trifunctional branching polycondensation reaction, as well as the percent mass of the largest cluster relative to the system mass. After obtaining a gelled structure, the system was equilibrated and subjected to uniaxial tensile simulations. True stress and true strain values from the tensile simulations were plotted to calculate Young's modulus (E) based on the slope of the initial linear portion. The average equilibrated mass density was found to be 1.24 g/cc, while average E was calculated as 3.60 GPa. These properties agree with the experimental values of a mass density of 1.2 – 1.25 g/cc and E of 2.36 – 4.83 GPa.
THE ROLES OF INTERFACE, ADHEREND, AND ADHESIVE IN PLASMA- AND OTHER-TREATED JOINTS OF METALS AND FRP MATERIALS UNDER SHEAR DEFORMATION
Authors: QIAO YAO , MERKEL DANIEL R. , NICKERSON ETHAN K. , SEFFENS ROBERT J. , SHIN YONGSOON , PALLAKA MADHUSUDHAN R. , RAMOS JOSE L. , ORTIZ ANGEL , SIMMONS KEVIN L.
Published: October 2022

This work investigated the role of interface, adherend, and adhesive in adhesivelybonded metal-metal, metal-CFRTP, and CFRTP-CFRTP combinations with plasmatreated surfaces under shear deformation. To this end, aluminum alloys (AA5052 and AA6061) and short-carbon-fiber-reinforced polyamide 66 (CFRPA66) were used as examples and performed through single lap shear testing. The results showed that air plasma surface treatment can improve the shear behavior of adhesively-bonded AA5052-CFRPA66 and CFRPA66-CFRPA66 joints with about 20% enhanced lap shear strength compared to non-treated cases. Failure surface morphology of plasma-treated CFRPA66 adherend confirmed this improvement by showing an increased amount of adhesive failure than interfacial failure between CFRPA66 and adhesive. But this is not true for AA5052-AA6061 joints with plasmatreated surfaces exhibiting almost no enhanced lap shear strength. This study also showed the importance of selecting a proper surface modification method for the enhancement of adhesive-bonded structures under shear deformation through the analysis of the results in this study and in the literature. For fiber- reinforced polymers (FRPs), improving FRP/adhesive interface may be prioritized via different surface modification methods (e.g., plasma, chemical coating, etc.) than adhesive modification methods. However, for surfacecleaned metals, toughening adhesive via different enhancement methods (e.g., nanoparticles, chemical enhancement, etc.) may be more important than improving metal/adhesive interface. These insightful results are valuable in the area of multimaterials joining.
EFFECTIVE TRANSVERSE REINFORCEMENT OF UNIDIRECTIONAL THIN PREPREG COMPOSITES USING VERTICALLY ALIGNED CARBON NANOTUBES
Authors: ENAB WALAA , KEY STEVEN , BRADFORD PHILIP
Published: October 2022

In this paper, we investigate the use of vertically aligned carbon nano tubes (VACNTs) in laminated composites across nearby plies for developing advanced composites to improve the transverse mechanical properties of the composite. VACNTs introduced into the interlaminar area by manually printing aligned carbon nanotubes onto the surface of the composite prepreg plies. The transverse tensile test is utilized to determine the improvement in transverse mechanical properties. The results shows that the transverse tensile improved by 31.6 %. This approach demonstrates extremely promising outcomes in terms of improving the composite's transverse strength.
MONITORING VOID FORMATION DURING LIQUID COMPOSITE MOLDING BY IN-SITU X-RAY COMPUTED TOMOGRAPHY
Authors: GAYOT SARAH F. , SOETE JEROEN , VANHULST JOHAN , BAILLY CHRISTIAN , GÉRARD PIERRE , PARDOEN THOMAS
Published: October 2022

Polymer composites manufactured by liquid molding contain voids, which may have several origins. Porosity patterns in composites are usually characterized ‘postmortem’ via X-ray computed tomography (XCT), which gives only limited information about the void formation mechanisms. In this work, a new lab-based XCT experiment is proposed for the dynamic in-situ monitoring of void formation in thick fiberreinforced polymer composites produced by vacuum infusion. In particular, the method makes it possible to follow the evolution of void volume fraction, size and location during the curing or polymerization of the infused resin within a fibrous preform.
NOVEL FLEXIBLE-MATRIX-COMPOSITE PUMP WITH HIGH ENERGY EFFICIENCY
Authors: GHONEIM HANY
Published: October 2022

The paper introduces a novel efficient compliant-body pump: flexible-matrixcomposite pump. The proposed pump enjoys a very high pumping potential (relative ejected volume per stroke) and a high-energy efficiency at low frequency. The high pumping potential is attributed to the negative high Poisson’s ratio of the flexible composite material that comprises the pumping chamber’s wall of the pump. Two fluidstructure- interaction analyses have been conducted for the simulation of the pumping action of the chamber and for the evaluation of the pump’s efficiency: a novel lumped system, which takes into consideration the negative Poisson’s ratio and the coefficient of mutual influence effects, and a finite element (ANSYS Workbench 2021 R2) analysis. The work concludes that the proposed pump has a promising potential at low frequency applications: it enjoys a very high pumping potential (volumetric-ejection ability) as well as a high-energy efficiency.
MULTIFUNCTIONAL ENERGY STORAGE INTEGRATION INTO ELECTROSPUN EPOXY-CNT NANOFIBER ENHANCED CFRP COMPOSITE STRUCTURE
Authors: BISWAS PIAS KUMAR , JADHAV MAYUR , LIYANAGE ASEL ANAND HABARAKADA , DALIR HAMID , AGARWAL MANGILAL
Published: October 2022

This work presents and assesses a structural integrity concept for a multifunctional carbon fiber reinforced composite with an embedded lithium-ion battery. In order to find a better packaging strategy for embedding lithium-ion batteries at its core, we compared adaptable composite structures made of traditional carbon fiber reinforced polymer (CFRPs), air-sprayed, and electrospun epoxy-multiwalled carbon nanotubes (epoxy-CNT) enhanced CFRPs. The electrospinning technique is well recognized across the world as a versatile and cost-effective way of producing continuous nanofilaments. It was precisely applied to the prepreg surface to provide efficient interfacial bonding and adhesion between the layers. The mechanical and physical characteristics of CFRPs reinforced with electrospun epoxy-carbon nanotubes have been demonstrated to be superior to those of conventional CFRP prepreg composites. Simultaneously, the air sprayed epoxy-carbon nanotube enhanced CFRP provides more mechanical strength than conventional CFRP prepreg but less than electrospun fiber-enhanced composites. The new multifunctional energy storage composite (MESC) might be a design factor in terms of economic feasibility. These components also help to the battery's structural load-bearing implementation and effective load transmission without damaging the battery's chemical composition. MESC design validation, manufacturing procedures, and experimental characterization (mechano-electrical) are all investigated in this paper. The electrochemical characterization findings demonstrate that the MESCs function similarly to ordinary lithium-ion pouch cells without any external packaging and under all loading circumstances. The mechanical strength and stiffness of the MESC cells, especially the electrospun epoxy-CNT enhanced MESC, are tested in three-point bending tests. The results show that the electrospun epoxy-CNT enhanced MESC has a lot more strength and stiffness than traditional pouch cells and air-sprayed CFRP at a lower weight and thickness. This mechanical robustness of the MESCs enables them to be manufactured as energy-storage devices for electric vehicles.
RAPID CURING OF EPOXY RESIN USING SELF- SUSTAINED FRONTAL POLYMERIZATION TOWARDS THE ADDITIVE MANUFACTURING OF THERMOSET FIBER COMPOSITES
Authors: WANG YEQING , LAMPKIN SPENCER
Published: October 2022

The demand for lightweight and high-performance thermoset fiber composites, such as the carbon fiber reinforced epoxy resin composites, has been rapidly increasing in a wide variety of industries. However, thermoset composites require cross linking for curing and consolidation, which is time consuming and can often take several hours. Additionally, the associated capital, operation, and maintenance costs are immense. The major challenge in the additive manufacturing and repair of thermoset-matrix fiber composites is an issue with the in-situ curing. To address this challenge, one of the promising solutions is to use the frontal polymerization technique to significantly reduce the curing time, from several hours to only a few seconds, while simultaneously obviating the need for external heating sources. In this work, the frontal polymerization of the epoxy resin, i.e., one of the most used thermoset resins for fiber composites, is investigated. Specifically, the frontal polymerization is initiated by the ultraviolet LED light. Then, with the help of a thermal co-initiator, the exothermic heating released due to the photopolymerization triggers the thermal polymerization, leading to a selfsustained polymerization front to form and propagate through the epoxy resin. Preliminary experimental results on the effect of weight fraction of the thermal coinitiator on the performance of the frontal polymerization of epoxy resin are presented and discussed. Results include the temperature measurements, SEM images showing the surface morphology of the cured epoxy resin specimens, and the tensile properties of the cured epoxy resin. The tensile properties of the epoxy resin specimens cured using the frontal polymerization technique are also compared with those of a conventional thermoset epoxy resin.
CHARACTERIZATION AND IMPROVISATION OF DIRECT- INK-WRITING (DIW) TECHNIQUE WITH IN-SITU ELECTRIC FIELD TO PRINT HIGHLY ALIGNED CARBON FIBER/EPOXY COMPOSITE
Authors: MONDAL ANIRBAN , SAHA MRINAL C. , MAITY KUNTAL , ALTAN M. CENGIZ , LIU YINGTAO
Published: October 2022

An investigation is presented on direct-ink-writing (DIW) of carbon fiber epoxy composite with and without an electric field. Initial emphasis is focused on the importance of DIW and a common notion that DIW/3D printing aids in better alignment across a printed specimen. For this purpose, the DIW technique is utilized in printing a single filament dog bone specimen, and uniaxial tensile tests were performed on all printed specimens. Furthermore, the microstructure of the printed sample and the fracture surface of the specimens was performed using a high-resolution scanning electron microscope (SEM). It was found that the fibers adjacent to the surface of the printed specimens were highly aligned along the printing direction, whereas the fibers at the core remain mostly misaligned. This could be due to the high shear stress and higher change in velocity gradient of the ink at the inner nozzle wall, which leads to better alignment of the fibers along the print direction. However, very little or negligible change in shear stress and velocity gradient at the core of the ink filament at the nozzle leads to poor alignment of the fibers during extrusion. Thus, integrating DIW and the electric field was conceived, which could effectively be used to align fibers at the surface and the core of the ink filament during the extrusion of the ink. The in-situ electric field, in association with the direct ink writing fabrication (iEF-DIW) technique, effectively aids in controlling both in-plane and through-thickness properties of the composite by controlling the alignment of the carbon fibers. This fabrication technique could effectively replace most of the conventional as well as cumbersome methods that are used to orient/align fibers/fillers in the desired direction.
Postr;merías
Authors: Arjonilla Álvarez María , Bilbao Peña Daniel , Infante del Rosal Fernando
Published: October 2022

Este libro compila una serie de obras artísticas y textos de investigación que tiene como objetivo proyectar una nueva visión de Valdés Leal (Sevilla, 1622-1690) y de su tiempo con motivo del cuarto centenario del nacimiento del pintor. El volumen incluye las aportaciones realizadas por el profesorado de los grados de Bellas Artes y de Conservación y Restauración de Bienes Culturales y por estudiantes del Programa de Doctorado en Arte y Patrimonio de la Facultad de Bellas Artes de la Universidad de Sevilla que formaron parte de la exposición "Postrimerías", organizada en colaboración con el Hospital de la Santa Caridad. El nombre de la muestra hace alusión a las célebres pinturas conocidas como "Jeroglíficos de las Postrimerías", que Miguel Mañara encargó al pintor para el programa iconográfico que él mismo diseñó cuando fue nombrado Hermano Mayor del hospital en el año 1663, con sus simbólicos momentos de la muerte, el juicio, el castigo y la gloria. La parte pictórica se complementa con numerosos textos de investigación y con una extensa sección dedicada a la presentación crítica de las obras y artistas participantes.
Konfederacje wojskowe w Rzeczypospolitej w historiografii
Authors: Srogosz Tadeusz
Published: October 2022

The analysis of the historiography of military confederations in the Commonwealth is a complex task and demands further research. There is a need to highlight the fact that the genesis of confederations is really complicated as it involves economic, political and social factors. Also, it is crucial to address the problem associated with attempts to determine which historical event should be regarded as the first confederation. Multithreading and the necessity to classify confederations according to their duration, range of operations and received support make it essential to analyze this issue more broadly. The aim of the present article is to show the state of research concerning confederations from the late 19th century to the present day. In addition, the author described projected research directions and listed elements that should complement the current research.
„Nie jest łatwe żadnym sposobem ugaszenie tego ognia”. Problem konfederacji lwowskiej z 1622 r. w korespondencji nuncjusza Cosimo de Torresa z Sekretariatem Stanu Stolicy Apostolskiej
Authors: Duda Paweł
Published: October 2022

The extensive correspondence by Cosimo de Torres, who held the office of Papal Nuncio, is the source basis for the consideration of the Lviv Confederation. The letters sent to the Secretariat of State from January to October 1622 include a great number of interesting information concerning, inter alia, the troops’ movements. It is worth taking into account the fact that the information came from the monarch, his closest environment, and the parleys that took place in Lviv. The analysis of the mentioned correspondence enables an insight into the views strongly connected with the royal camp and with the opinion of de Torres’s own position on events he witnessed. However, the question of Nuncio’s understanding of the described processes and his political activity requires further studies.
Początki konfederacji wojska koronnego pod laską Adama Ostrzyckiego w 1665 roku
Authors: Nagielski Mirosław
Published: October 2022

The issues connected with Lubomirski’s Rebellion were the object of researchers’ interest both in the context of military and political activities as well as relations between the society of the Commonwealth and the royal court. As regards the mentioned subject, it is also worth mentioning that the Franco-Austrian rivalry for influence in the Polish-Lithuanian Commonwealth and its connection with Condé’s candidacy for the Polish that was proposed by the court camp in 1659. What is more, the nobility disagreed on the aspirations of Jan Kazimierz Waza that were perceived as the pursuit of absolutism. The issues of support for ex-marshal Lubomirski by the crown army and its long term results became also quite vital. The present article is focused on the reflection on attitudes of the army and the ways of its funding during the civil war between the royal army and the rebels. Moreover, the article is supplemented with an annex presenting the list of confederate banners from 5 July 1665.
Awantury o związek wojska litewskiego w bezkrólewiu po śmierci Jana Sobieskiego i kwestia jego inspiracji przez Marię Kazimierę
Authors: Skrzypietz Aleksandra
Published: October 2022

The decline of Jan III Sobieski’s reign in the Polish-Lithuanian Commonwealth was marked by attempts to build an opposition to the influences of the Sapieha family. During the interregnum those activities were continued, and even grew in strength. Trying to weaken the authority of the Great Crown Hetman Kazimierz Jan Sapieha and to prevent him from using the army to put his own candidate on the throne, the Confederation of the Lithuanian army was formed. There is a widespread belief that people connected with the republican party hostile to the Sapieha family were behind its establishment. However, the hearsays that Maria Kazimiera took part in it by founding the army revolt were spread soon. The confederation was a part of actions against the Sapieha family initiated by Jan III, so it is possible that the queen was involved in the revolt. Nevertheless, the Sapieha family and people associated with them claimed to possess correspondence proving the queen’s participation in the mentioned events. It was even said the copies of her letters existed. During the whole period of interregnum, none of them were revealed. They were cited without being presented, despite the fact that they were demanded to be shown at the time of the election. Maria Kazimiera denied the existence of the mentioned correspondence and demanded that the primate stop the actions of members of the Sapieha family who accused her of the establishing of the confederation. None of the documents relating the queen to the confederation were released. Although there is no proof that she took part in founding the confederation, she certainly never wrote any letters that could link her to the revolt of the Lithuanian army.
Tuberculosis, A Great Masquerader: A Case Report of Disseminated Multifocal Skeletal TB and Tracheoesophageal Fistulae Mimicking Metastatic Cancer
Authors: Subramony Hariharan , Hegde Manjunatha Gajanana , Raghavan Balagurunathan
Published: October 2022

Disseminated tuberculosis (TB) can mimic metastatic disease because of its multi-organ involvement (including bones), which can make the diagnosis much more complicated. Tracheoesophageal fistula is a very uncommon manifestation of TB, as is multifocal skeletal TB. There are reports of TB presenting either as multifocal skeletal TB or as tracheoesophageal fistulae, but we could not find any case reports describing both of these entities in a single patient and essentially mimicking a metastatic oesophageal neoplasm. However, we here describe one such case, which was managed medically.
Transient Leukopenia Induced by Combination Therapy for Severe SARS-CoV-2 Pneumonia
Authors: Sullivan Sierra , Leelaviwat Natnicha , Davalos Jesus , Evans Abbie , Abdelnabi Mahmoud , Mittal Neha
Published: October 2022

Treatment strategies for patients with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) continue to be heavily researched and ever-changing. Recent data has suggested that combination therapy with dexamethasone, remdesivir and baricitinib could decrease the severity and length of illness in patients with severe SARS-CoV-2. However; the data regarding the safety and side effects related to this combination therapy are limited to case reports. The purpose of this case report is to highlight a potentially life-threatening side effect of one or all medications mentioned above.
'How can I include them?': Teaching pupils with visual impairment in the inclusive music classroom
Authors: Pino Ángela , Rodríguez-Rossell Carla , Viladot Vallverdú Laia
Published: October 2022

In most cases, music teachers lack specific strategies to give an appropriate response to the educational needs of students with visual impairments. Taking into account the need to find new approaches that are helpful for music teachers to go through the many challenges of inclusion, this article explores the potential that active music methods may have in the inclusive music education of students with visual disabilities. This exploratory study uses qualitative content analysis in combination with a case study method, intending to contrast the resources found in three active music methods (Ward’s, Dalcroze’s, and Suzuki’s) with the real experience of a music teacher. Results include ten resources which promote learning for all students along with the description of how the teacher used them in real life, examples and guidelines to be applied in the music classroom. Conclusions show that the pedagogies analyzed offer a wide range of opportunities for multi-sensory learning through the resources presented -which can also be transferred to other music pedagogies-, and confirm that active music methods facilitate inclusion in environments where students with visual disabilities are present.
Estrategias didácticas para la enseñanza de la geometría y dibujo técnico en Diseño Gráfico: Estudio de caso
Authors: López Macías José Luis , Aguayo Triviño Mariuxi Viviana
Published: October 2022

El aprendizaje significativo en el entorno universitario es una teoría del modelo constructivista que permite a los estudiantes integrar el conocimiento previo, hechos y experiencias con lo aprendido en clase. Se fomenta así una actitud favorable para el aprendizaje a través de la participación activa de estudiantes y docentes a la vez que se vinculan estos conocimientos con el ejercicio profesional, proporcionando saberes y competencias para la vida. El presente estudio propone el uso de esta teoría en la enseñanza de la geometría y el dibujo técnico en el primer año de Diseño Gráfico, carrera que reúne estudiantes noveles de diversa formación secundaria y con poca experiencia en estas disciplinas, por lo que las perciben, en muchos casos, como inconexas para su formación y el ejercicio profesional. En el presente trabajo se exponen las estrategias didácticas aplicadas, los productos desarrollados y la valoración de los estudiantes ante su participación activa en el proceso de aprendizaje. Se ha realizado un estudio de caso que permitió evidenciar la necesidad de transformar la didáctica de estas asignaturas, con el fin de que los estudiantes puedan integrar estos nuevos saberes y aplicarlos para afrontar los desafíos propios del ejercicio profesional del diseño gráfico.
entidades en el ApS: Un estudio para promover proyectos más participativos
Authors: Monjas Aguado Roberto , Martínez-Abajo Judit , Gamito Gomez Rakel
Published: October 2022

El Aprendizaje Servicio (ApS) se ha convertido en una valiosa alternativa para promover una formación universitaria vinculada a valores de participación activa y responsabilidad social, pero resulta esencial que su aportación no deje de lado a las entidades. Los efectos, beneficios e impacto que tienen los proyectos no siempre se tienen en cuenta al mismo nivel que el del alumnado que desarrolla los servicios en ellas. Esta carencia se constata en el estudio desarrollado desde el proyecto de investigación I+D+i “AprendizajeServicio Universitario en Actividad Física y Deporte. Oportunidad para la Inclusión Social (activat@s)” (PID2019-105916RB-I00 EDU), en el que se intentará dar respuesta a dicha inquietud, tratando de escuchar a las entidades para conocer de primera mano su punto de vista y conseguir que tengan una mayor presencia en los proyectos. En el presente artículo, tras mostrar la importancia de fortalecer la relación activa con las entidades para lograr una transformación social coherente en la que todos los agentes puedan implicarse al mismo nivel en el ApS del ámbito universitario, se explica el proceso que lleva a diseñar un instrumento de investigación que permita indagar en cómo ven las entidades los proyectos ApS universitarios.
Aprendizaje-Servicio en Educación Física para la inclusión social
Authors: Vizcarra Morales María Teresa , Lleixà Teresa
Published: October 2022

Introducción a la sección monográfica.
Filter-free photonics-assisted frequency translator with a tunable phase shift and amplitude based on an integrated DP-QPSK modulator
Authors: Li Yan , Wang Muguang , Li Qi , Guo Yuxiao , Wu Beilei , Liu Yan , Chen Desheng
Published: October 2022

In this paper, we propose and demonstrate a novel, to the best of knowledge, filter-free photonics-assisted microwave frequency translator with a tunable phase shift and amplitude. The pivotal component of the proposed scheme is an integrated dual-polarization quadrature phase shift keying (DP-QPSK) modulator, which is applied to generate a polarization orthogonal carrier-suppressed single sideband modulation signal and frequency shifted optical carrier signal. The polarization-multiplexed optical signal outputs from the DP-QPSK modulator is then sent to a photodetector (PD) via a polarization controller (PC) and a polarizer to implement photoelectric conversion. The electrical signal output from the PD is the desired frequency translated microwave signal, and the amount of frequency shift is determined by the frequency of the sawtooth wave applied to the DP-QPSK modulator. In addition, since the PC can be used to adjust the polarization angle and introduce a phase difference between the two orthogonally polarized optical signals, the phase shift and amplitude of the obtained translated signal can also be easily tuned. A theoretical analysis and simulation experiment are carried out to verify the feasibility of the proposed scheme. The simulation results show that the novel scheme can realize frequency translation with a 360° continuously tunable phase shift and adjustable amplitude for both a single-tone signal and linearly frequency modulated signal with a 50 MHz bandwidth. The spurious suppression ratios of the single-tone signal and LFM signal after frequency translation are larger than 48 and 30 dB, respectively.