bluuebunny/crossref_metadata_2025 huggingface dataset:
The Zombie in Contemporary French Caribbean Fiction
Authors: Swanson Lucy
Published: January 2024

Believed to have emerged in the French Caribbean based on African spirit beliefs, the zombie represents not merely the walking dead, but also a walking embodiment of the region’s history and culture. In Haiti today, the zombie serves as an enduring memory of enslavement: it is defined as a reanimated body robbed of part of its soul, forced to work in sugarcane fields. In Martinique and Guadeloupe, the zombie takes the form of a shape-shifting evil spirit, and represents the dangers posed to the maroon or “freedom runner.” The Zombie in Contemporary French Caribbean Fiction is the first book-length study of the literary zombie in recent fiction by writers from the region and its diaspora. It examines how this symbol of the enslaved (and of the evil spirits that threaten them) is used to represent and critique new socio-political situations in the Caribbean. By identifying four “avatars” of the zombie—the slave, the trauma victim, the horde, and the popular zombie—that appear frequently in fiction and anthropology, exploring how works by celebrated and popular authors reimagine these archetypes, it offers a comprehensive and focused examination of the ways contemporary authors from Haiti and the French Antilles contribute to the global zombie imaginary.
The Financial Markets of Roman Egypt
Authors: Kelly Paul V.
Published: January 2024

This book analyses some 4,367 financial transactions, leases, sales and loans, recorded on papyri in Roman Egypt in the period AD 1 to 350. The analysis of this remarkable body of information, the ancient equivalent of modern-day ‘Big Data’, helps us understand how ordinary people thought about some of the most important decisions they would make in their life: buying a house, lending their savings or renting land. Using innovative theories and techniques inspired by classics, mathematics and the financial markets, it brings out the differences and similarities of behaviours with modern and historical comparators. The book looks at risk and return for both asset holders - the landlords and lenders - and those dependent on the use of those assets - the tenants and borrowers. In particular it quantifies the risks facing families, including climate variability. Issues such as wealth concentration, social mobility and the role of the aged and women in the financial markets are addressed. The analysis presented expands our knowledge of the nature of the financial markets, and from that examination a sharper insight into the nature of the economy of the Roman world is gained, making it clear that there was no single “market” economy, but different sectors, some of which were driven by reciprocity/redistribution and others by financially rational judgements.
The Evolution and Significance of the Powered Bulk Carrier
Authors: Fenton Roy
Published: January 2024

This pioneering study traces the technical development of the dry bulk carrier, a ship of major importance to the world’s economy. It identifies the first of these as being built in the 1850s as screw colliers to work in the British East coast coal trades. These ships successfully combined iron hulls, large holds and hatches, a steam engine and the facility to carry water ballast. Successive technological developments in shipbuilding and marine engineering allowed the same features to be applied to both larger and smaller ships. On the one hand, this gave the ubiquitous deep-sea tramp steamer, and its eventual successors the modern bulk carrier, and on the other the steam and later diesel coasters suited to short-distance bulk trades. The consequences for the shipping industry of the emergence of these ships are considered, not least the completion of the transition from sail to powered vessels. These developments also had significant impacts on the building, ownership, finance and crewing of ships, and on the size and facilities of ports worldwide. The emergence of the bulk carrier facilitated industrialisation, and these ships’ contribution to the world’s economy and society as a whole are considered, especially in terms of globalisation.
The Wicker Man
Authors: Wiggins Steve A.
Published: January 2024

Many fans of Robin Hardy's The Wicker Man (1973) may know that this classic is considered a fine sample of folk horror. Few will consider that it's also a prime example of holiday horror. Holiday horror draws its energy from the featured festive day, here May Day. Sergeant Neil Howie (Edward Woodward), a 'Christian copper,' is lured to the remote Scottish island Summerisle where, hidden from the eyes of all, a thriving Celtic, pagan religion holds sway. His arrival at the start of the May Day celebration is no accident. The clash between religions, fought on the landscape of the holiday, drives the story to its famous conclusion.In this Devil's Advocate, Steve A. Wiggins delineates what holiday horror is and surveys various aspects of 'the Citizen Kane of horror movies' that utilize the holiday. Beginning with a brief overview of Beltane and how May Day has been celebrated, this study considers the role of sexuality and fertility in the film. Conflicting with Howie's Christian principles, this leads to an exploration of his theology as contrasted with that of Lord Summerisle (Christopher Lee) and his tenants. Such differences in belief make the fiery ending practically inevitable
The Arab Nationalist Advisor
Authors: Kechichian Joseph A.
Published: January 2024

Shaykh Yusuf Yassin (1892-1962) marked the contemporary history of the Kingdom of Saudi Arabia in his capacity as a favorite advisor who was the founder monarchs confidential secretary, relentless envoy and chief foreign policy consultant. Born in Latakiyyah, Syria, Yassin earned the confidence of King ‘Abdul ‘Aziz bin ‘Abdul Rahman Al Sa‘ud, and moved to Riyadh even before the Third Saudi Kingdom was inaugurated in 1932. After obtaining citizenship, he participated in critical decisions reached by the ruler as regional and international actors honed in on the wealth of the Arabian Peninsula. Over the course of several decades Yassin met with and negotiated on behalf of three monarchs, ‘Abdul ‘Aziz and his two successors, Sa‘ud and Faysal, with Arab and global leaders. He was present at the creation of the country and suggested that al-Sa‘udiyyah be added to its very name Al-Mamlakah al-‘Arabiyyah al-Sa‘udiyyah which reflected his personality and political outlook as an Arab nationalist who cherished the founder. This political biography of the statesman, based on original documents [the Yassin Papers] as well as Western diplomatic correspondence, provides insights into the Nationalist Al Sa‘ud Advisor who left his mark on the Kinngdom. The volume provides essential background on a man who rose from humble origins in Syria to espouse Arabian values, and walks the reader through nearly five decades of Arab history, including the repercussions of the infamous 1916 Sykes-Picot Agreement, the creation of the League of Arab States, and various Arab crises.
The Films of Michael Mann
Authors: Swan Deryck
Published: January 2024

Is Michael Mann an auteur? Mann is a formidable filmmaking personality, no doubt, but the notion that today's celebrity cult of director immediately correlates with the mysterious sect of 'auteur' is questionable and deserves to be investigated.
In doing so this book strives to emulate the methodology of the man himself, by ranging over not only the films he has made, from the rugged existentialism of 1979's The Jericho Mile to the negative space of 2015's Blackhat, but also the scope of intellectual interests that they exemplify in an attempt to mine the commonalities, themes and traits that may suggest the presence of an auteur. Through his investigation of Mann's filmography and the personality that flows through it, author Deryck Swan provides the reader with accessible and new ways of thinking about his films to date, including, amongst myriad other things, references to painter Morris Louis, the style of desert modernism, West Coast prison culture and its brand of masculinity, Chicago Mayor Richard M. Daley, Strain Theory, journalist Mike Royko, Chicago's Auditorium building, Los Angeles, criminality and a largely forgotten Charles Bronson film.
Relativistic Phase Space Diffusion of Compact Object Binaries in Stellar Clusters and Hierarchical Triples
Authors: Hamilton Chris , Rafikov Roman R.
Published: January 2024

The LIGO/Virgo detections of compact object mergers have posed a challenge for theories of binary evolution and coalescence. One promising avenue for producing mergers dynamically is through secular eccentricity oscillations driven by an external perturber, be it a tertiary companion (as in the Lidov–Kozai, LK, mechanism) or the tidal field of the stellar cluster in which the binary orbits. The simplest theoretical models of these oscillations use a “doubly averaged” (DA) approximation, averaging both over the binary’s internal Keplerian orbit and its “outer” barycentric orbit relative to the perturber. However, DA theories do not account for fluctuations of the perturbing torque on the outer orbital timescale, which are known to increase a binary’s eccentricity beyond the maximum DA value, potentially accelerating mergers. Here we reconsider the impact of these short-timescale fluctuations in the test-particle quadrupolar limit for binaries perturbed by arbitrary spherical cluster potentials (including LK as a special case), in particular including 1pN general relativistic (GR) apsidal precession of the internal orbit. Focusing on the behavior of the binary orbital elements around peak eccentricity, we discover a new effect, relativistic phase space diffusion (RPSD), in which a binary can jump to a completely new dynamical trajectory on an outer orbital timescale, violating the approximate conservation of DA integrals of motion. RPSD arises from an interplay between secular behavior at extremely high eccentricity, short-timescale fluctuations, and rapid GR precession, and can change the subsequent secular evolution dramatically. This effect occurs even in hierarchical triples, but has not been uncovered until now.
A Photohadronic Interpretation of H.E.S.S. Afterglow Observations of GRB 221009A
Authors: Sahu Sarira , Medina-Carrillo B. , Páez-Sánchez D. I. , Sánchez-Colón G. , Rajpoot Subhash
Published: January 2024

The High Energy Stereoscopic System (H.E.S.S.) started observing the extremely powerful long-duration gamma-ray burst (GRB) GRB 221009A starting 53 hr after the triggering event. The H.E.S.S. collaboration carried out observations on 2022 October 11, 12, and 17 under poor atmospheric conditions, without detecting significant very-high-energy photons from the source and computed the upper limits of the fluxes for the different nights. We study these flux upper limits by using the photohadronic model and show that the interaction of high-energy protons with synchrotron seed photons in the forward-shock region of the GRB jet exhibits behavior compatible with the upper limits computed by the H.E.S.S. collaboration.
shock_cooling_curve: A Python-based Package for Extensive and Efficient Modeling of Shock Cooling Emission in Supernovae
Authors: Venkatraman Padma , Jacobson-Galán Wynn
Published: January 2024

The light-curve evolution of a supernova contains information on the exploding star. Early-time photometry of a variety of explosive transients, including Calcium-rich transients and type IIb/Ibc and IIP supernovae shows evidence for an early light curve peak as a result of the explosion’s shock wave passing through extended material (i.e., shock cooling emission (SCE)). Analytic modeling of the SCE allows us to estimate progenitor properties such as the radius and mass of extended material (e.g., the stellar envelope) as well as the shock velocity. In this work, we present a Python-based open-source code that implements four analytic models originally developed in Piro, Piro et al. and Sapir & Waxman applied to photometric data to obtain progenitor parameter properties via different modeling techniques (including nonlinear optimization, Markov Chain Monte Carlo sampling). Our software is easily extendable to other analytic models for SCE and different methods of parameter estimation.
Geriatric risk model for older patients with diffuse large B-cell lymphoma (GERIAD): a prospective multicenter cohort study
Authors: Yhim Ho-Young , Park Yong , Kim Jeong-A , Shin Ho-Jin , Do Young Rok , Moon Joon Ho , Kim Min Kyoung , Lee Won Sik , Kim Dae Sik , Lee Myung-Won , Choi Yoon Seok , Jeong Seong Hyun , Kim Kyoung Ha , Kim Jinhang , Lee Chang-Hoon , Song Ga-Young , Yang Deok-Hwan , Kwak Jae-Yong
Published: January 2024

Background/Aims: Optimal risk stratification based on simplified geriatric assessment to predict treatment-related toxicity and survival needs to be clarified in older patients with diffuse large B-cell lymphoma (DLBCL).Methods: This multicenter prospective cohort study enrolled newly diagnosed patients with DLBCL (≥ 65 yr) between September 2015 and April 2018. A simplified geriatric assessment was performed at baseline using Activities of Daily Living (ADL), Instrumental ADL (IADL), and Charlson’s Comorbidity Index (CCI). The primary endpoint was event-free survival (EFS).Results: The study included 249 patients, the median age was 74 years (range, 65-88), and 125 (50.2%) were female. In multivariable Cox analysis, ADL, IADL, CCI, and age were independent factors for EFS; an integrated geriatric score was derived and the patients stratified into three geriatric categories: fit (n = 162, 65.1%), intermediate-fit (n = 25, 10.0%), and frail (n = 62, 24.9%). The established geriatric model was significantly associated with EFS (fit vs. intermediate-fit, HR 2.61, p < 0.001; fit vs. frail, HR 4.61, p < 0.001) and outperformed each covariate alone or in combination. In 87 intermediate-fit or frail patients, the relative doxorubicin dose intensity (RDDI) ≥ 62.4% was significantly associated with worse EFS (HR, 2.15, 95% CI 1.30–3.53, p = 0.002). It was related with a higher incidence of grade ≥ 3 symptomatic non-hematologic toxicities (63.2% vs. 27.8%, p < 0.001) and earlier treatment discontinuation (34.5% vs. 8.0%, p < 0.001) in patients with RDDI ≥ 62.4% than in those with RDDI < 62.4%.Conclusions: This model integrating simplified geriatric assessment can risk-stratify older patients with DLBCL and identify those who are highly vulnerable to standard dose-intensity chemoimmunotherapy.
Pre-service primary teachers' perceptions of gamification as a methodology
Authors: Colomo Magaña Ernesto , Colomo Magaña Alejandro , Cívico Ariza Andrea , Basgall Lauren
Published: January 2024

Gamification involves making teaching processes fun with the intention of improving factors that affect learning, such as motivation. Although the focus is not on the game itself and the corresponding entertainment, its design and results provide an alternative for developing educational proposals that make students the protagonists and generate student engagement with their education. On that basis, this study aims to understand pre-service primary school teachers’ perceptions of gamification as an active methodology, taking the gender and time of analysis variables into account. To this end, a quantitative longitudinal panel design (pre-test and post-test) from a descriptive and inferential approach was applied. The sample consisted of 284 pre-service primary education teachers from the University of Málaga (2021/2022 academic year). The information was collected through a validated instrument that measures perceptions of both digital didactic resources and teaching methodologies. The results revealed positive perceptions of gamification as a methodology, with a significant improvement from the pre-test to post-test scores. As for the analysis of the gender variable, there were significant differences, with the male participants’ ratings of gamification being higher than those of the female participants. In conclusion, gamification constitutes a feasible methodology to implement due to being well-received by university students, as a result of its motiving and fun nature and the fact that it makes students the protagonists of the learning process.
Microcreativity with chat generative pre-trained transformer: Learnings in virtual space
Authors: Machado Fiuza Fialho Lia , Nascimento Sabino Neves Vanusa , Silva do Nascimento Karla Angélica
Published: January 2024

The Chat Generative Pre-trained Transformer (ChatGPT) is an artificial intelligence technology that engages in dialogue with humans, capable of generating formulations in the form of micro-narratives that can be problematized as a learning tool in the virtual space. This research aims to understand how ChatGPT can be used in teacher training as a didactic tool to facilitate learning in the virtual space through micro-narratives. We conducted a qualitative study using an action research approach with Brazilian students from the Graduate Program at the State University of Ceará in Brazil. The research consisted of five phases: diagnosis, which involved a mixed questionnaire to assess prior knowledge about generating micro-narratives using ChatGPT; action planning, which involved developing a training plan; implementation of the action, which included practicing the use of ChatGPT to generate micro-narratives and working with them in a didactic perspective in the virtual space; evaluation, which involved sharing the micro-narratives and engaging in circular discussions about them; and learning, which involved documenting the educational possibilities and limitations of micro-narratives. The results, processed using IRaMuTeQ, showed limited prior knowledge about ChatGPT and the importance of micro-narratives for educational work, as well as their fruitful pedagogical use for learning in the virtual space through conscious utilization.
La documentación cartográfica de la Contribución de inmuebles, cultivo y ganadería: el caso de la provincia de Girona (1849-1885)
Authors: Nadal Francesc , Burgueño Jesús
Published: January 2024

La introducción y gestión del impuesto de Inmuebles, Cultivo y Ganadería, implantado en España a raíz de la reforma fiscal de 1845, generó durante la segunda mitad del siglo XIX una ingente documentación fiscal, entre la que figuran padrones de riqueza y amillaramientos, y también en algunas provincias mapas parcelarios municipales. En este artículo se analiza la cartografía parcelaria municipal producida en la provincia de Girona a raíz de la implantación de este impuesto. Para ello se ha consultado la documentación cartográfica y fiscal conservada en los archivos locales, públicos y privados de la provincia de Girona. La documentación cartográfica parcelaria localizada ha sido analizada comparándola con la cartografía parcelaria municipal de las provincias de las Baleares, Barcelona y Tarragona, la cual ha sido objeto de diversos estudios en los últimos años. Como resultado de esta investigación, se han inventariado 46 mapas parcelarios correspondientes a 44 municipios de la provincia de Girona. La realización de esta documentación cartográfica fue obra de un variado grupo de agrimensores y maestros de obras que mayoritariamente ejercían su profesión en la misma provincia. Los levantamientos cartográficos tomaron impulso a partir de 1857, a raíz del incremento del cupo de la contribución territorial asignado ese año a la provincia de Girona, así como al subsiguiente proceso de rectificación de los amillaramientos ordenado por el ministerio de Hacienda. La cartografía parcelaria gerundense presenta algunas características diferenciales respecto de otras provincias catalanas, entre ellas el uso de una escala mayor.
Ranqueles militarizados en la Frontera Sur de Córdoba y San Luis (República Argentina, 1872-1887)
Authors: Pérez Zavala Graciana
Published: January 2024

En el trabajo se aborda el devenir histórico de las poblaciones indígenas que interactuaron en la Frontera Sur (República Argentina) durante el siglo XIX. Centra su análisis en el tramo de las provincias de Córdoba y San Luis, en cuyos fuertes fueron instalados entre 1872 y 1881 ranqueles provenientes de la Pampa Central. Algunos llegaron en condición de prisioneros en tanto que otros lo hicieron en la modalidad de «presentación» al ejército argentino. Nuestra meta es caracterizar la militarización de estos contingentes en un contexto en el que el Gobierno argentino estaba definiendo acciones para ocupar definitivamente el territorio habitado por los indígenas de Pampa y Norpatagonia. Se hace uso de fuentes castrenses y eclesiásticas conservadas en archivos públicos y privados.
Y Franco se quedó sin exequatur. El asesinato de José Gallostra y la tensión diplomática entre España y México (febrero y marzo de 1950)
Authors: Sola Ayape Carlos
Published: January 2024

El 20 de febrero de 1950, y a plena luz del día, tuvo lugar en la Ciudad de México el asesinato de José Gallostra y Coello de Portugal, representante oficioso de la España de Franco en México, perpetrado por Gabriel Salvador Fleitas Rouco, un anarquista exiliado de origen español. Ante tal acontecimiento, que conmocionó a la opinión pública en ambos países, el objetivo del presente artículo es analizar, desde la aportación de fuentes primarias, la reacción de la España franquista ante dicho crimen, poniendo el foco de atención en dos escenarios de actuación: la representación española en México, ubicada en la Avenida Paseo de la Reforma 77 de la capital mexicana, y la del Ministerio de Asuntos Exteriores español, situada en el Palacio de Santa Cruz de Madrid. Como se verá, el régimen franquista buscó la concesión del exequatur mexicano como paso jurídico previo para lograr la anhelada normalización de las relaciones con México.
L’État-nation, une malédiction historique ?
Authors: Delalande Nicolas
Published: January 2024

Avec l’essor des approches globales et transnationales, la place de l’État-nation dans l’histoire des sociétés humaines a été relativisée, voire critiquée en raison des violences qu’il a engendrées au XXe siècle. Pourtant, l’État-nation résiste et continue d’être le principal lieu d’exercice de la souveraineté et de la citoyenneté au XXIe siècle. Cet article invite donc à écrire une histoire globale des États-nations et à approfondir la réflexion sur les conditions de leur démocratisation.
Jean Jaurès, avocat de la retraite par capitalisation : pour une histoire politique longue du capital mutualisé du XXIe siècle
Authors: Rosental Paul-André
Published: January 2024

Lors des débats qui président à la loi de 1910 sur les retraites ouvrières et paysannes, Jean Jaurès n’hésite pas dénoncer l’ignorance économique et la méfiance du mouvement ouvrier face à la capitalisation. Dans une filiation conceptuelle qui remonte aux Lumières, il vante les droits garantis par les mécanismes assurantiels, la fiabilité de la comptabilité administrative, la force politique de la démocratie des épargnants et la perspective d’assurer une ère de sécurité sociale qui s’étendra à l’indemnisation de la maladie et du chômage et à la réforme de la fiscalité. L’article suggère ainsi la nécessité d’une histoire longue de l’État-Providence, dont les acquis constituent le capital oublié du XXIe siècle, et interrogent la nature même de nos sociétés.
Spinal Myoclonus a Rare Complication Following Administration of Spinal Anaeasthesia – A Case Report
Authors: Kandearachchi K. A. M. S. P. , Menike A. G. H. , Madawala K. G. , Sarathchandra H. H. , Jayawardana N. L. S. H. , Kulasiri H. R. R. , Samarasekara D. I. J.
Published: January 2024

Spinal myoclonus is a rare complication following spinal anesthesia. Transient myoclonic jerks are referred as spinal myoclonus and it is diagnosed by exclusion. This case report describes a successful management of spinal myoclonus after spinal anesthesia.A 48 year old, woman who had undergone incision and drainage under spinal anesthesia, developed truncal myoclonus 45 minutes following induction of anesthesia. It was effectively alleviated through administration of IV midazolam.
A review on synthesis of graphene-based materials for energy storage devices
Authors: De Silva R. C. L. , Abeykoon A. M. K. L. , Kottegoda I. R. M.
Published: January 2024

The extraordinary properties of graphene have made application of this wonder material in multidisciplinary domains. Promising applications of graphene and its composites have been made a reality through enormous scientific efforts to date. In the present era, the attention has to focus on the right choice of methodology analogous to each application. The prospective product range of graphene is broad, and the attentiveness of each application would be deviated accordingly. We believe priority should be given to the most essential needs among the vast variety of opportunities. Here we focus on methods followed in the production of graphene and composites and their applications in energy storage devices including batteries, capacitors, and fuel cells. Physical, chemical, and biological methodologies followed in minute scale synthesis as well as mass level are discussed. The information would be supportive of the development of more effective energy storage devices based on graphene in soon.
Individual Blade Control for Component Load Alleviation Using Higher-Order Linear Time-Invariant Models
Authors: Mballo Chams Eddine , Prasad J.V.R.
Published: January 2024

This paper explores the synthesis of a novel load alleviation scheme based on active rotor control for critical helicopter component life extension. The proposed load alleviation scheme is innovative as it demonstrates how individual blade control (IBC) and model prediction can be combined
using higher-order linear time-invariant models to develop a life-extending control scheme. Using a reduced-order coupled body‐rotor‐inflow dynamic model onboard the vehicle and a cost function, cost‐minimizing higher harmonic IBC inputs are computed over a selected time
horizon and used to reduce selected harmonics of component loads during flight. The proposed component load alleviation using the IBC scheme is implemented in a comprehensive nonlinear model of a generic helicopter to evaluate its performance. Nonlinear model simulations show that significant
individual harmonic load reduction can be obtained with very little impact on the maneuver performance, vibratory hub loads, and uncontrolled harmonics of component loads. Furthermore, using the handling qualities requirement on small-amplitude pitch changes in forward flight, alongside the
pitch attitude and agility quickness metrics, it is demonstrated that the proposed scheme does not cause handling qualities degradation.
Spatial-temporal risk factors in the occurrence of rabies in Mexico
Authors: Ortega-Sánchez Reyna , Bárcenas-Reyes Isabel , Luna-Cozar Jesús , Rojas-Anaya Edith , Cuador-Gil José Quintín , Cantó-Alarcón Germinal Jorge , Veyna-Salazar Nerina , González-Ruiz Sara , Milián-Suazo Feliciano
Published: January 2024

Rabies is a zoonotic disease that affects livestock worldwide. The distribution of rabies is highly correlated with the distribution of the vampire bat Desmodus rotundus, the main vector of the disease. In this study, climatic, topographic, livestock population, vampire distribution and urban and rural zones were used to estimate the risk for presentation of cases of rabies in Mexico by co- Kriging interpolation. The highest risk for the presentation of cases is in the endemic areas of the disease, i.e. the States of Yucatán, Chiapas, Campeche, Quintana Roo, Tabasco, Veracruz, San Luis Potosí, Nayarit and Baja California Sur. A transition zone for cases was identified across northern Mexico, involving the States of Sonora, Sinaloa, Chihuahua, and Durango. The variables topography, vampire distribution, bovine population and rural zones are the most important to explain the risk of cases in livestock. This study provides robust estimates of risk and spread of rabies based on geostatistical methods. The information presented should be useful for authorities responsible of public and animal health when they plan and establish strategies preventing the spread of rabies into rabies-free regions of México.
Effect of ultrafiltration on whole blood coagulation profile during cardiopulmonary bypass in cardiac surgery: a retrospective analysis
Authors: Lee Jaemoon , Lee Dong-Kyu , Kwon Won-Kyoung , Lee Sookyung , Oh Chung-Sik , Görlinger Klaus , Kim Tae-Yop
Published: January 2024

Background: Ultrafiltration (UF) would enhance coagulation profiles by concentrating coagulation elements during cardiopulmonary bypass (CPB) for cardiac surgery. Methods: We retrospectively reviewed electronic medical records of 75 patients who had undergone cardiac surgery with rotational thromboelastometry-based coagulation management in a university hospital and analyzed the UF-induced changes in the maximum clot firmness (MCF) of extrinsically activated test with tissue factor (EXTEM) during CPB in 30 patients. Results: The median volume of filtered-free water was 1,350 ml, and median hematocrit was significantly increased from 22.5% to 25.5%. As the primary measure, UF significantly increased the median MCF-EXTEM from 48.0 mm to 50.5 mm (P = 0.015, effect size r = 0.44). The area under the receiver operating characteristic curve pre-UF MCF-EXTEM for discrimination of any increase of MCF-EXTEM after applying UF was 0.89 (95% CI [0.77, 1.00], P < 0.001), and its cut-off value was 50.5 mm (specificity of 81.8% and sensitivity of 84.2% in Youden’s J statistic). In the secondary analyses using the cut-off value, UF significantly increased the median MCF-EXTEM from 40.5 mm to 42.5 mm in 18 patients with pre-UF MCF-EXTEM ≤ 50.5 mm. However, it did not increase MCF-EXTEM in 12 patients with pre-UF MCF-EXTEM > 50.5 mm. There was a significant interaction between pre-UF MCF-EXTEM values and applying UF (P < 0.001 for the subgroup, P = 0.046 for UF, P = 0.003 for interaction).Conclusions: Applying UF improved clot firmness, and the improvement was more pronounced when pre-UF MCF-EXTEM had been reduced during CPB.
Assessment of Zero-Day Vulnerability using Machine Learning Approach
Authors: S SakthiMurugan , A Sanjay Kumaar , Vignesh Vishnu , P Santhi
Published: January 2024

Organisations and people are seriously threatened by zero-day vulnerabilities because they may be utilised by attackers to infiltrate systems and steal private data. Currently, Machine Learning (ML) techniques are crucial for finding zero-day vulnerabilities since they can analyse huge datasets and find patterns that can point to a vulnerability. This research’s goal is to provide a reliable technique for detecting intruders and zero-day vulnerabilities in software systems. The suggested method employs a Deep Learning (DL) model and an auto-encoder model to find unusual data patterns. Additionally, a model for outlier detection that contrasts the autoencoder model with the single class-based Support Vector Machine (SVM) technique will be developed. The dataset of known vulnerabilities and intrusion attempts will be used to train and assess the models.
Hilbert's 13th problem for algebraic groups
Authors: Reichstein Zinovy
Published: January 2024

The algebraic form of Hilbert's 13th problem asks for the resolvent degree

\operatorname{RD}(n)

of the general polynomial

f(x) = x^n + a_1 x^{n-1} + \cdots + a_n

of degree

n

, where

a_1, \ldots, a_n

are independent variables. The resolvent degree is the minimal integer

d

such that every root of

f(x)

can be obtained in a finite number of steps, starting with

\mathbb{C}(a_1, \ldots, a_n)

and adjoining algebraic functions in

\leqslant\nobreak d

variables at each step. Recently Farb and Wolfson defined the resolvent degree

\operatorname{RD}_k(G)

for every finite group

G

and any base field

k

of characteristic

0

. In this setting

\operatorname{RD}(n) = \operatorname{RD}_{\mathbb{C}}(\operatorname{S}_n)

, where

\operatorname{S}_n

denotes the symmetric group. In this paper we extend their definition of

\operatorname{RD}_k(G)

to an arbitrary algebraic {group}

G

over an arbitrary field

k

. We investigate the dependency of this quantity on

k

and show that

\operatorname{RD}_k(G) \leqslant 5

for any field

k

and any connected group

G

. The question whether

\operatorname{RD}_k(G)

can be bigger than

1

for any field

k

and any algebraic group

G

over

k

(not necessarily connected) remains open.
Стабильные расслоения и проблема Римана-Гильберта на римановой поверхности
Authors: Vyugin Il'ya Vladimirovich , Dudnikova Lada Andreevna
Published: January 2024

Работа посвящена исследованию голоморфных векторных расслоений с логарифмическими связностями на компактной римановой поверхности и применению полученных результатов к исследованию вопроса положительной разрешимости проблемы Римана-Гильберта на римановой поверхности. Мы приводим пример представления фундаментальной группы римановой поверхности с четырьмя выколотыми точками, который не может быть реализован как представление монодромии логарифмической связности с четырьмя особыми точками ни в каком полустабильном расслоении. Для произвольной пары - расслоение и логарифмическая связность в нем - мы доказываем оценку на наклоны присоединенных факторов фильтрации Хардера-Нарасимхана. Кроме этого, мы представляем некоторые результаты о реализуемости представления в качестве прямого слагаемого в представлении монодромии логарифмической связности в полустабильном расслоении нулевой степени.
Библиография: 9 названий.
Круговой критерий и критерий Цыпкина для систем с несколькими нелинейностями без использования $S$-процедуры
Authors: Kamenetskiy Vladimir Aleksandrovich
Published: January 2024

В задаче абсолютной устойчивости систем Лурье с несколькими нелинейностями круговой критерий (для систем с непрерывным временем) и критерий Цыпкина (для систем с дискретным временем) получены с использованием теоремы о свертывании и без использования $S$-процедуры. Доказаны две теоремы, которые используют теорему о свертывании и позволяют существенно уменьшать размерность связанных систем линейных матричных неравенств.
Библиография: 19 названий.
PARTICIPAÇÃO DOS ANALISTAS SELL-SIDE E BUY-SIDE EM TELECONFERÊNCIAS DE RESULTADOS E O RETORNO DAS AÇÕES
Authors: Santos Debora Cristine dos , Scherer Luciano Márcio , Barros Cláudio Marcelo Edwards
Published: January 2024

Este estudo buscou verificar o reflexo da participação dos analistas sell-side e buy-side em teleconferências de resultados no retorno das ações das empresas de capital aberto brasileiras, tendo como fundamento a Teoria da Divulgação e a Hipótese do Mercado Eficiente (HME) na sua forma Semiforte. Os argumentos esboçados na literatura sobre o tema partem do pressuposto de que a participação dos analistas sell-side e buy-side em teleconferências de resultados impacta nos retornos anormais do mercado de capitais. Para a condução da pesquisa, foi obtida uma amostra de 79 companhias brasileiras de capital aberto, com 1372 transcrições de teleconferências. O período de análise compreendeu 6 anos (2010 a 2016). Foi realizado análise dos retornos anormais e retornos anormais acumulados (CAR), utilizando o teste de sinais, sendo possível constatar que a proporção de retornos anormais acumulados positivos é estatisticamente igual à proporção de retornos anormais negativos e não aponta uma direção específica para os retornos anormais acumulados, demonstrando equilíbrio entre retornos positivos e negativos. No entanto em quatro setores da amostra, Aeroespacial, Cosméticos, Varejo e Saneamento, os resultados apontam que a participação do sell-side e buy-side nas teleconferências gerou informação para o mercado, refletindo no retorno anormal e no retorno anormal acumulado das ações das empresas desses setores.
Aircraft Cockpit Window Improvements Enabled by High-Strength
Tempered Glass
Authors: Lampman DeWitt
Published: January 2024

This research was initiated with the goal of developing a significantly stronger
aircraft transparency design that would reduce transparency failures from bird
strikes. The objective of this research is to demonstrate the fact that
incorporating high-strength tempered glass into cockpit window constructions for
commercial aircraft can produce enhanced safety protection from bird strikes and
weight savings. Thermal glass tempering technology was developed that advances
the state of the art for high-strength tempered glass, producing 28 to 36%
higher tempered strength.

As part of this research, glass probability of failure prediction methodology was
introduced for determining the performance of transparencies from simulated bird
impact loading. Data used in the failure calculation include the total
performance strength of highly tempered glass derived from the basic strength of
the glass, the temper level, the time duration of the load, and the area under
load.

A high-strength transparency construction developed using advanced technology
tempered glass could produce significant weight saving estimated at 28% for a
typical Boeing 737 jetliner window, or about 11.5 kg for the four windows of the
Boeing 737 flight deck.

The conclusions from the principals developed in this research for an advanced
transparency construction including a 0.378-in. thick high-strength core ply
could reduce the probability of failure from bird strike loading from 4,503 to
953 parts-per-million (PPM). A 0.500-in. thick high-strength standard thickness
core ply could reduce the probability of failure from bird strike loading from
4,503 to 1.7 PPM.
Research on Improving the Efficiency of Centrifugal Pump Using the
Different Vane Surfaces of Bearings
Authors: Chen Hanxin , Guo Xiaoyan , Nguyen Vanliem
Published: January 2024

With the use of the stepped surface of the friction pairs of the stepped bearings
(SB) in the high-speed centrifugal pumps, its liquid film thickness is suddenly
changed and it was discontinuously distributed in the direction of motion of
pump. To ensure the continuity of the liquid film thickness and enhance the
lubrication efficiency of the pump, based on the lubrication model of the SB,
two other structures of the inclined surfaces [inclined bearings (IB)] and
curved surfaces [curved bearings (CB)] used to replace stepped surfaces of the
SB are investigated, respectively. Under the same conditions of the minimum
thickness of the liquid film and initial dimensions of the sliding friction
pairs, the influence of both the thickness ratio (α) of the
liquid film and dimension ratio (β) in the direction of motion
of SB, IB, and CB on the bearing capacity and friction coefficient of the liquid
film are simulated and analyzed, respectively. Based on the optimal ratios
{α and β} of SB, IB, and CB in improving
bearing capacity and minimizing friction, the lubrication efficiency between SB,
IB, and CB is then simulated and compared. The results indicate that the maximum
bearing capacity of the CB is obviously enhanced by 11.1% and 39.7%, whereas the
minimum friction coefficient is also remarkably decreased by 15.8% and 36.9%
compared to the IB and SB, respectively. Besides, the maximum liquid film
pressure of the CB is also higher than that of the IB and SB by 5.5% and 13.9%,
respectively. Therefore, the use of the curved surface of the CB can further
enhance the lubrication efficiency and reduce the friction of the liquid film in
the high-speed centrifugal pumps.
Variation in organic matter characteristics and mitigation of ultrafiltration membrane fouling by chlorine and UV/chlorine pre-oxidation in secondary effluent treatment
Authors: Sun Zhihua , Gao Lei , Wang Dong , Liu Lingjie , Qiu Chensheng , Wang Shaopo
Published: January 2024

Membrane fouling caused by effluent organic matter (EfOM) limits its further application in wastewater reuse. In this study, the effect of UV/chlorine pretreatment on membrane fouling was investigated in treating secondary effluent by ultrafiltration (UF) process. The relation between organic matter changes and fouling alleviation after UV/chlorine pretreatment was also studied according to the molecular weight (MW) changes in various resin fractions derived from EfOM. Results showed that UV/chlorine pretreatment effectively alleviated irreversible fouling, whereas chlorine pre-oxidation primarily mitigated reversible fouling. UV/chlorine pre-oxidation reduced 18% of reversible membrane fouling and 38% of irreversible membrane fouling at a chlorine dosage of 8 mg/L, indicating better performance in membrane fouling mitigation than chlorine pre-oxidation. UV/chlorine pre-oxidation also decreased dissolved organic matter in the UF permeate. The hydrophobic acidic (HPO-A) fraction caused dominant membrane fouling, while the hydrophilic (HPI) fraction contained most of high MW organic matter. Pre-oxidation changed the polarity of organic matter in the HPO-A fraction and decomposed the organics of high MW in the HPI fraction, which alleviated membrane fouling. These results showed that UV/chlorine pre-oxidation was a prospective pretreatment process prior to UF in wastewater reclamation.
NGHIÊN CỨU ĐỘNG HỌC CỦA PHẢN ỨNG CO2 REFORMING CH4 SỬ DỤNG XÚC TÁC COBALT MANG TRÊN Al2O3 VỚI CHẤT XÚC TIẾN La2O3
Authors: TRẦN NGỌC THẮNG  , BẠCH THỊ MỸ HIỀN
Published: January 2024

Phản ứng CO2 reforming gần đây nổi lên như một phương pháp tiềm năng sản xuất khí tổng hợp từ khí tự nhiên giàu CO2. Trong khi đó, xúc tác Cobalt với chất xúc tiến đang được nhận được nhiều sự quan tâm bởi chúng không chỉ có hoạt tính xúc tác tốt cho phản ứng CO2 reforming mà còn phù hợp cho các ứng dụng quy mô lớn. Nghiên cứu này đánh giá hoạt động của 5%La10%Co/Al2O3 trong phản ứng CO2 reforming ở các nhiệt độ phản ứng khác nhau trong điều kiện áp suất riêng phần tác chất lần lượt thay đổi. Sự hiện diện quá mức của CH4 trong nguyên liệu tạo điều kiện thuận lợi cho quá trình phân hủy CH4 trên xúc tác dẫn đến tắc nghẽn các tâm hoạt động.Sự gia tăng của làm tăng khả năng hấp thụ CH4 trên bề mặt chất xúc tác, do đó làm tăng lượng CO2 chuyển hóa thông qua phản ứng. Sự tăng thúc đẩy phản ứng khí hóa cặn cacbon từ quá trình phân hủy CH4. Tốc độ chuyển hóa của CH4 chịu ảnh hưởng nhiều bởi sự tăng nhiệt độ so với CO2. Phản ứng CO2 reforming trên xúc tác 5%La10%Co/Al2O3 đã được chứng minh là xảy ra theo cơ chế hấp phụ đồng thời của CH4 và CO2 trên các vị trí hoạt động kép hoặc các tâm hoạt động khác nhau và chất xúc tác thể hiện sự ổn định tốt trong suốt 48 giờ phản ứng ở 1023 K.
TỔNG HỢP XANH VÀ KHẢO SÁT KHẢ NĂNG KHÁNG KHUẨN CỦA NANO VÀNG TỪ CHIẾT XUẤT LÁ CÂY NGŨ GIA BÌ
Authors: NGUYỄN THỊ LAN HƯƠNG  , BẠCH THỊ MỸ HIỀN
Published: January 2024

Hiện nay, các hạt nano Vàng (AuNPs) đang thu hút sự quan tâm của các nhà khoa học do chúng có tiềm năng ứng dụng hứa hẹn làm vật liệu phân phối thuốc/tác nhân kháng viêm trực tràng thông qua đường uống. Tuy nhiên, AuNPs cũng được biết đến như là vật liệu có tính kháng khuẩn mạnh, gây ra ảnh hưởng tiêu cực lên hệ vi sinh đường ruột. Bên cạnh đó, việc sử dụng AuNPs tổng hợp từ nguồn hóa chất công nghiệp độc hại sẽ tác động xấu đến sức khỏe con người, không phù hợp trong ứng dụng lâm sàng. Trong công trình này, các hạt nano Vàng hình cầu, kích thước nhỏ hơn 50 nm đã được tổng hợp thành công bằng phương pháp tiếp cận xanh, sử dụng dịch chiết của lá cây Ngũ Gia Bì đóng vai trò làm chất khử và chất ổn định. Khảo sát kháng khuẩn cho thấy, ngay cả ở nồng độ nano Vàng cao các hạt nano Vàng thể hiện khả năng kháng khuẩn thấp đối với 5 chủng vi khuẩn lần lượt là Bacillus cereus, Bacillus subtilis, Staphylococcus aureus, Salmonella typhi, Escherichia coli với đường kính vòng kháng khuẩn dao động từ 7,03  1,05 mm đến 8,67  0,58 mm.  Mẫu nano Vàng thu được không thể hiện tính kháng khuẩn đối với chủng Pseudomonas aeruginosa ở tất cả các nồng độ khảo sát. Như vậy, với tính kháng khuẩn không quá mạnh, các hạt nano Vàng được tổng hợp từ dịch chiết của lá cây Ngũ Gia Bì có thể trở thành vật liệu tiềm năng trong ứng dụng phân phối thuốc.
NGHIÊN CỨU KÉO DÀI TUỔI THỌ CỦA HOA HỒNG ĐỎ ĐÀ LẠT CẮT CÀNH BẰNG DỊCH CHIẾT LÁ CHÙM NGÂY
Authors: ĐINH VĂN TRÌNH
Published: January 2024

Nghiên cứu này đánh giá ảnh hưởng của dịch chiết lá chùm ngây lên việc kéo dài tuổi thọ bình của hoa hồng đỏ Đà Lạt (Rosa hybrida L.) cắt cành. Thí nghiệm được bố trí theo kiểu thay đổi một yếu tố, hoàn toàn ngẫu nhiên, bao gồm 4 nghiệm thức, mỗi nghiệm thức được lặp lại 3 lần. Hoa hồng đỏ Đà Lạt được cắm trong dịch chiết lá chùm ngây với các nồng độ 1%, 3% và 5%. Kết quả cho thấy dịch chiết lá chùm ngây ở tất cả nồng độ đều có tác dụng kéo dài đáng kể tuổi thọ của cành hoa so với mẫu đối chứng trong nước máy. Hoa cắm trong dịch chiết có khả năng hút nước tốt hơn nhờ tác dụng ức chế vi sinh vật. Phân tích sinh hóa cho thấy hàm lượng diệp lục trong lá và hàm lượng MDA ổn định, sự sản sinh H2O2 ít và hoạt độ của enzyme catalase cao hơn khi mẫu được xử lý bằng dịch chiết chùm ngây ở tất cả các nồng độ.
NGHIÊN CỨU THU NHẬN VÀ KHẢO SÁT HOẠT TÍNH KHÁNG OXY HÓA, KHÁNG KHUẨN CỦA DỊCH CHIẾT FLAVONOID TỪ LÁ CỦA CÂY ĐƠN LÁ ĐỎ (Excoecaria cochinchinensis Lour)
Authors: TRỊNH NGỌC NAM  , NGUYỄN VĂN DŨNG  , DƯƠNG QUỐC CƯỜNG
Published: January 2024

Lá của cây đơn lá đỏ có chứa nhiều hợp chất có hoạt tính sinh học như flavonoid, tannin, saponin, coumarin, phytosterol, đường tự do... Trong đó, flavonoid giữ vai trò bảo vệ tế bào, chống oxy hoá và có kháng khuẩn…. Mục tiêu là khảo sát phương pháp ngâm dầm và phương pháp ngâm dầm kết hợp sóng siêu âm, với các điều kiện như dung môi chiết (nước, ethanol, methanol), nhiệt độ, thời gian siêu âm để thu nhận flavonoid hiệu quả. Khảo sát hoạt tính kháng oxy hóa và hoạt tính kháng khuẩn của cao chiết. Kết quả, phương pháp ngâm dầm kết hợp sóng siêu âm cho hiệu quả thu nhận flavonoid cao nhất với thời gian ngâm dầm là 15 giờ, thời gian siêu âm là 20 phút, nhiệt độ là 60oC. Phân tích dịch chiết flavonoid bằng HPLC/MS có 14 peak, phân tích khối phổ ESI-Micro TOF-Q đã xác định được 3 chất là kaempferol 7-o-glucosid, kaempferol và acid palmitic. Định lượng kaempferol trong mẫu dựa trên chất chuẩn kaempferol (Sigma-Aldrich) bằng phương pháp HPLC/UV và hàm lượng kaempferol trong mẫu là 680,5 µg/g. Hoạt tính kháng oxy hóa và kháng khuẩn của dịch chiết flavonoid từ lá cây đơn lá đỏ tương đối cao. Kết quả nghiên cứu cho thấy tiềm năng ứng dụng của cây đơn lá đỏ trong dược liệu và thực phẩm chức năng.
KHẢO SÁT ĐIỀU KIỆN NUÔI CẤY CHO KHẢ NĂNG SINH TỔNG HỢP CELLULASE TỪ Bacillus subtilis TH-VK22
Authors: NGUYỄN MỘC TẤN  , NGUYỄN NGỌC ẨN  , NGUYỄN THỊ DIỆU HẠNH  , PHẠM TẤN VIỆT*
Published: January 2024

Phần lớn enzyme cellulase trên thị trường hiện nay có nguồn gốc từ vi sinh vật. Trong đó, vi khuẩn đã được chứng minh là nhóm sinh vật có nhiều tiềm năng ứng dụng trong việc sản xuất cellulase nhờ khả năng sinh trưởng nhanh và sản xuất nhiều loại enzyme ngoại bào. Trong nghiên cứu này, Bacillus subtilis TH-VK22 đã được nuôi cấy và đánh giả khả năng sinh tổng hợp cellulase. Môi trường Bushnell Haas Medium (BHM) với thành phần chủ yếu là các muối vô cơ đã được sử dụng để khảo sát điều kiện nuôi cấy thích hợp cho khả năng sinh tổng hợp cellulase của chủng vi khuẩn này. B. subtilis TH-VK22 sản xuất được cellulase có hoạt tính tốt khi nuôi cấy trong môi trường BHM có bổ sung 11,0% maltodextrin, 2,0 peptone, 0,5% rơm, pH 5,0 và 35°C. Cellulase từ chủng B. subtilis TH-VK22 có thể hoạt động ổn định trong khoảng pH 5,0-9,0. Kết quả này cho thấy tiềm năng ứng dụng trong nhiều ngành công nghiệp khác nhau của B. subtilis TH-VK22, đặc biệt là trong ngành sản xuất nhiên liệu sinh học.