107 research outputs found
Experimental investigation on the accuracy of XCT measurement of fiber length in fiber reinforced polymers
No full textX-ray computed tomography (XCT) allows performing non-destructive measurements of fibers in fiber-reinforced polymeric materials. The accurate evaluation of fiber orientation and fiber length distribution is particularly useful as these factors have a strong influence on physical and mechanical properties of such materials. XCT data is already successfully used for fiber orientation analysis, whereas the fiber length measurement is more complex as it requires the individual fibers to be identified and segmented. Software tools able to cope with such tasks are available, but the accuracy of XCT fiber length measurement has not been thoroughly investigated so far. In this work, an experimental methodology was developed to determine the accuracy of XCT based fiber length measurements, using a reference object that was specifically designed, produced and calibrated for this purpose
Unmalted Cereals, Oenological Yeasts, and In-Bottle Sugar Addition as Synergic Strategies to Enhance the Quality of Craft Beers
No full textCraft beer quality is the result of the complex interactions among ingredients. The purpose of this work was to assess the influence of combinations of cereal mixtures, yeast strains, and sucrose added for the refermentation in bottle on the physico-chemical and sensory characteristics of the resulting beers in order to maximize their antioxidant content and overall quality. More in depth, brewing trials were carried out with 16 combinations of 2 cereal mixtures (made of 60% malted barley/40% unmalted durum or soft wheat), 4 oenological Saccharomyces cerevisiae strains (17290 and 14061 isolated from Negroamaro; 9502 and 9518 from Susumaniello musts), and 2 concentrations of sucrose for refermentation (6 and 9 g/L). If maximizing the total phenolic content is the goal, the best beers were those obtained from the mixtures containing durum wheat and fermented by S. cerevisiae 17290 and 14061. Instead, the best sensory results were obtained from brewing the mixture containing the unmalted common wheat and fermented by S. cerevisiae 9518 thanks to their persistent foam; high turbidity, alcohol content, effervescence, and body; and low saltiness and sourness. The physico-chemical and sensory quality of beers were mainly affected by the cereal mixtures and secondarily by yeasts. The quantity of sucrose added for refermentation affected only CO2, residual sugar, and foam
Retrograde drilling for ankle joint osteochondral lesions: a systematic review
No full textAbstract Background Extensive literature exists about the treatment of ankle osteochondral lesions, but there is no specific review of retrograde drilling, despite its common application. Indications for retrograde drilling are still few and are far from clear, and some evolutions of the technique have recently occurred. The aim of this review is to provide an update on actual applications and techniques of retrograde drilling for ankle osteochondral lesions. Methods A systematic review was carried out according to the 2020 PRISMA guidelines. The PubMed and Embase databases were searched in June 2023. The search string focused on studies related to retrograde drilling in the treatment of ankle osteochondral lesions. Results Twenty-one articles for a total of 271 ankles were included in this review. The mean length of the treated lesions was 11.4 mm. Different navigation systems were used, with fluoroscopy the most commonly used. Various adjuvants were employed after drilling, with bone graft the most commonly applied. In most cases, postoperative patient satisfaction and symptom relief were reported, and no complications occurred. Retrograde drilling was found to be suitable for the treatment of subchondral cysts with intact cartilage or small lesions. Some modifications to the original technique may allow surgical indications to be extended to more complex cases. Conclusions Middle-term results of retrograde drilling showed postoperative satisfaction and symptom relief with both original and modified techniques. Additional research is required to investigate the long-term results. Level of evidence: IV. Trial registration: This systematic review was registered on PROSPERO (id number: CRD42022371128)
A source of reflection on Christian witness and mission under the action of the Holy Spirit
No full textThe article studies the relationship which binds together the sacrament of Confirmation with the other two sacraments of initiation, namely Baptism and Eucharist. By referring to a number of liturgical and other texts, the author highlights the effects of the sacrament of Confirmation on the life and mission of the Christian in contemporary society. All confirmed Christians are called to bear witness and be instruments of evangelization.peer-reviewe
Conciliarism in de concordantia catholica by Nicholas of Cusa
No full textEn el presente trabajo pretendemos explorar el modo en que Nicolás de Cusa emplea la idea de concordancia, en relación al movimiento conciliarista, atendiendo de manera primordial, pero no exclusiva, a la utilización de ciertos conceptos claves en De Concordantia Catholica. La labor propuesta supone pensar al autor en el marco de las tensiones temporales para comprender así la sutiliza de su pensamiento. El itinerario parte de una conceptualización contextual de problemáticas nucleares, para luego abordar, de forma concreta, en la obra mencionada, tres cuestiones delimitadas: la idea de lo uno en lo múltiple, la concepción del poder ascendente y las relaciones iglesia-papado y papado-imperio, en base a la crítica a la teoría de la plenitudo potestaris, y, por último, el papel del concilio.In the present work we intend to explore the way in which Nicholas of Cusa uses the notion of concordance, in relation to the conciliar movement, and primary, but not exclusively, to the use of certain key concepts in De Concordantia Catholica. The proposed work involves thinking the author within the framework of the temporary tensions to understand well the subtlety of his thought. The itinerary start from a conceptualization of contextual nuclear problems, and then tackling concrete manner, in the work mentioned, three issues identified: the idea of the one in the multiple, the conception of the ascending power, and the relationship between church-papacy and papacy-empire, based on the criticism of the plenitudo postestatis and, finally, the role of the Council.Fil: Gerardi, Juan Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; Argentina. Universidad Nacional de Mar del Plata. Facultad de Humanidades. Departamento de Historia. Centro de Estudios Históricos; Argentin
Induction and repair of DNA DSB as revealed by H2AX phosphorylation foci in human fibroblasts exposed to low-and high-LET radiation: Relationship with early and delayed reproductive cell death
No full textThe spatial distribution of radiation-induced DNA breaks within the cell nucleus depends on radiation quality in terms of energy deposition pattern. It is generally assumed that the higher the radiation linear energy transfer (LET), the greater the DNA damage complexity. Using a combined experimental and theoretical approach, we examined the phosphorylation-dephosphorylation kinetics of radiation-induced Î3-H2AX foci, size distribution and 3D focus morphology, and the relationship between DNA damage and cellular end points (i.e., cell killing and lethal mutations) after exposure to gamma rays, protons, carbon ions and alpha particles. Our results showed that the maximum number of foci are reached 30 min postirradiation for all radiation types. However, the number of foci after 0.5 Gy of each radiation type was different with gamma rays, protons, carbon ions and alpha particles inducing 12.64 ± 0.25, 10.11 ± 0.40, 8.84 ± 0.56 and 4.80 ± 0.35 foci, respectively, which indicated a clear influence of the track structure and fluence on the numbers of foci induced after a dose of 0.5 Gy for each radiation type. The Î3-H2AX foci persistence was also dependent on radiation quality, i.e., the higher the LET, the longer the foci persisted in the cell nucleus. The Î3-H2AX time course was compared with cell killing and lethal mutation and the results highlighted a correlation between cellular end points and the duration of Î3-H2AX foci persistence. A model was developed to evaluate the probability that multiple DSBs reside in the same gamma-ray focus and such probability was found to be negligible for doses lower than 1 Gy. Our model provides evidence that the DSBs inside complex foci, such as those induced by alpha particles, are not processed independently or with the same time constant. The combination of experimental, theoretical and simulation data supports the hypothesis of an interdependent processing of closely associated DSBs, possibly associated with a diminished correct repair capability, which affects cell killing and lethal mutation
Surgical management of osteochondral lesions of the first metatarsal head: A systematic review
No full textBackground: Treating osteochondral lesions of the first metatarsal head can help reducing pain and preventing end-stage arthritic cartilage degeneration and hallux rigidus. Several surgical techniques have been described, but no clear indications are reported. This systematic review aims to offer an overview of the current surgical treatments for focal osteochondral lesions of the first metatarsal head. Methods: The selected articles were examined to extract data about population, surgical technique, and clinical outcomes. Results: Eleven articles were included. Mean age at surgery was 38,2 years. Osteochondral autograft was the most used technique. After surgery, an improvement was achieved in AOFAS, VAS, and hallux dorsiflexion but not in plantarflexion. Conclusion: There is limited evidence and knowledge regarding the surgical management of the first metatarsal head osteochondral lesions. Various surgical techniques have been proposed, drawn from other districts. Good clinical results have been reported. Further high-level comparative studies are necessary to design an evidence-based treatment algorithm
Study of the spectral response of CZT multiple-electrode detectors
No full textCadmium zinc telluride (CZT) is a promising material for room temperature X-ray and gamma-ray detectors. The high atomic number and the wide band-gap give high quantum efficiency and good room temperature performances. Due to hole trapping, particular electrode structures have been developed to provide single-charge carrier collection (electrons), exploiting the excellent charge transport properties of the electrons. In this work, the spectroscopic performances of two CZT detectors (CZT1: 5 mm times 5 mm times 0.90 mm; CZT2: 4.8 mm times 5 mm times 0.55 mm) with five electrodes (cathode, anode and three steering electrodes) were studied. The anode-collecting electrode, surrounded by three steering electrodes (biased for optimum charge collection), is mostly sensitive to electron carriers, overcoming the effects of hole trapping in the measured spectra (hole tailing). We investigated on the spectroscopic response (241Am source; 59.5 keV) of the detectors at different bias voltages of the electrodes. The detectors exhibit excellent energy resolution (CZT1: 2.0% FWHM at 59.5 keV; CZT2: 1.7% FWHM at 59.5 keV; working temperature -10degC) and low tailing (CZT1: FW.1M to FWHM ratio of 1.93 at 59.5 keV; CZT2: 2.35 at 59.5 keV). This study stresses on the excellent spectroscopic properties of the CZT detectors equipped with a custom anode layout, making them very attractive candidates as x-ray spectrometers mainly for medical applications
A New Future? The Catholic Church, Grassroots Justice, and Accountability
No full textBetween the 1970s and 1980s, Guatemalans, particularly the indigenous populations, were targets of a state-sponsored genocide. Several years after the genocide, Catholic Bishop Juan Gerardi of Guatemala City took the lead in creating the Recovery of Historical Memory Project which was an independent investigation into the events of the genocide. Gerardi was murdered before the report was made public. This paper will briefly discuss Gerardi’s work and his contribution to local justice in Guatemala. The author will then explore what contributions the Catholic Church could make in creating similar fact-finding missions. Could a grassroots mechanism such as the one Gerardi created be a more effective response in particular situations, given the political gridlock of local and national governments? This paper will explore this question and utilize an ongoing situation to examine whether it could be more effective than a government body
Dissertatio De Natura Et Indole Praecipuarum Specierum Jurisdictionis Germanicæ Politicæ
No full textKöln, Univ., jur. Diss. : 1754Quam ... Sub Praesidio ... D. Gerardi Ernesti Hamm; J. U. D. Nec Non Guilielmi De Monte, J. U. D. ... Publice JurisAuditorio Defendet Author Mathias Clasen, ex Eckem. Anno 1754. Die Mensis JuliiAutopsie nach Ex. der ULB Sachsen-AnhaltVorlageform des Erscheinungsvermerks: Coloniæ Typis Gereonis Arnoldi Schauberg
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