bluuebunny/crossref_metadata_2025 huggingface dataset:
Epilepsy in Stroke as De Novo Independent Nosology Unit – Physiology, Pathogenesis, Histology, Clinical Picture, Diagnosis, and Treatment – A Systematic Review
Authors: Naydenov Christiyan , Prakova Gospodinka , Tsokeva Jivka , Ananiev Julian , Ivanova Coni , Mancheva Velina , Manchev Lachezar , Yordanova Antoaneta
Published: February 2023

INTRODUCTION: Early seizures are considered complications of stroke, and late seizures are a type of structural epilepsy. If they are separated as a new independent nosology unit, the problem in the diagnostic – treatment approach will be solved. PHYSIOLOGY: Cerebral blood flow is regulated by local factors such as carbon dioxide and oxygen content. Brain activity is also an important factor in the regulation of the volume speed of the blood – with locally increased neuronal activity, the local blood flow increases. Neurons in the CNS are subject to a variety of effects mediated by membrane receptors of two types – ionotropic and metabotropic. PATHOGENESIS: Early seizures are due to transient biochemical dysfunctions, while late seizures are due to gliosis changes affecting neuronal excitability. HISTOLOGY: The highlighted histopathological aspects confirm and support the results of clinical and radiological studies with dead nervous tissue, replaced by numerous newly formed capillaries, and surrounded by lipid-laden macrophages. CLINICAL PICTURE: This is represented by a complex combination of excitatory epileptic manifestations and residual focal symptoms depending on the localization of the lesion. LABORATORY DIAGNOSTICS: A very typical group of patients with post-stroke seizures have a high risk of recurrence when some of the studied biomarkers for this are available in the blood. In summary, the additional expanded package of studies of stroke patients should include screening diagnostics for the risk of epileptic seizures, namely: IL-6, IL-1β, TNF, Mg2+, Ca2+, CD40L, and Hsc70. IMAGING: Transient periodic MRI abnormalities have been demonstrated, possibly as a result of cerebral edema induced by seizure activity. Routine MRI in stroke patients is recommended. TREATMENT: It is possible that rt-PA may increase the risk of early seizures after stroke. Levetiracetam (LEV) as a neuroprotective agent in stroke has been proposed as the drug of first choice, based on safety and efficacy profiles. The usual practice is to treat recurrent early-onset seizures with short-term (3–6 months) treatment with antiepileptic drugs. CONCLUSIONS: Separation of stroke-epilepsy as a new independent nosology entity will solve the diagnostic-treatment problems in this area by changing the minimum package for laboratory tests, as well as routine MRI in patients with clinical evidence of stroke. LEV is the first-line agent for the treatment of these patients, in combination with correction of registered laboratory parameters.
Association between Illness Perception and Anxiety Undergoing Percutaneous Coronary Intervention in Patients with Acute Coronary Syndrome: A Pilot Study
Authors: Achmad Bayu Fandhi , Setiyarini Sri , Sutono Sutono , Rasyid Frida , Fitriawan Akbar Satria , Kafil Raisa Farida
Published: February 2023

BACKGROUND: Patients’ illness perceptions are thought to be associated with anxiety undergoing percutaneous coronary intervention (PCI) in patients with acute coronary syndrome (ACS).
AIM: This study aimed to determine the association between illness perception and anxiety undergoing PCI in patients with ACS.
METHODS: This study used a cross-sectional design and enrolled 50 hospitalized patients with ACS who underwent elective PCI between December 2019 and March 2020. The study instruments were the Brief-Illness Perception Questionnaire to evaluate illness perception and the Zung Self-Rating Anxiety Scale to evaluate patients’ anxiety. Statistical analysis was performed using the Pearson correlation test with significance set as p < 0.05.
RESULTS: This study showed that 56% of respondents had positive perceptions toward their disease. The majority of respondents (94%) also indicated a low level of anxiety undergoing PCI. The Pearson correlation test results revealed a significant association between illness perception and the level of anxiety undergoing PCI in patients with ACS (p = 0.043; r = 0.287).
CONCLUSION: There is a significant association between illness perception and anxiety undergoing PCI in patients with ACS. The positive perceptions led to lower patients’ anxiety, and vice versa.
Does State Ownership Impact Green Bond Issuance? International Evidence
Authors: Glavas Dejan , Bancel Franck
Published: February 2023

Nous analysons dans cette étude l’actionnariat des entreprises émettrices d’obligations vertes dans 18 pays entre 2013 et 2017. En utilisant des régressions et un échantillon apparié d’entreprises émettrices d’obligations vertes et non vertes, nous montrons que la présence d’un actionnariat étatique est un facteur déterminant de la décision d’émettre une obligation verte. Nos résultats montrent également que le lien entre l’actionnariat étatique et les émissions d’obligations vertes s’est renforcé après l’accord de Paris, notamment dans les pays disposant d’un cadre institutionnel faible. Nous avons réalisé divers tests de robustesse pour garantir la validité de nos résultats, selon lesquels l’implication de l’Etat est cruciale pour favoriser les engagements environnementaux des entreprises.
L’accès à l’Assistance Médicale à la Procréation (AMP) pour les couples de femmes et les femmes seules. Quelles tensions éthiques ?
Authors: Bringer Jacques
Published: February 2023

La récente loi de bioéthique valide des aspirations sociétales et individuelles ouvrant le droit des couples homosexuels et lesbiens à la parenté et à la parentalité. Le désir de maternité chez toute femme est une aspiration légitime, forte, attendue d’autant plus lorsque le projet parental est pensé et solide. De même, le droit à disposer de son corps et, d’un point de vue égalitaire, la reconnaissance de l’infertilité sociale ne soulèvent pas de débat. Le questionnement et la résistance à l’ouverture de l’AMP tenait à la rupture anthropologique de programmer la naissance d’un enfant sans père. L’intérêt supérieur de l’enfant posait la question : grandir et être éduqué sans père est-il bon et égalitaire ? Ainsi, la démarche éthique doit s’interroger sur les nuisances potentielles à autrui en mesurant et prévenant toutes les conséquences et les effets collatéraux à court et long terme de la loi. Les études de suivi des enfants nés de maternités monoparentales sont très insuffisantes pour effacer tout doute. La mise en place d’études plus consistantes, sans a priori, sans discrimination, devraient viser à mieux connaître le devenir de l’enfant afin de mieux l’accompagner. De plus, les moyens alloués aux centres d’AMP doivent être abondés afin de permettre l’application de la loi sans pénaliser les couples infertiles affectés d’une pathologie ou d’un handicap par un allongement de délai d’attente inacceptable.
Médecine génomique et loi du 2 août 2021 relative à la bioéthique : une circulation renforcée des données génétiques sur la personne
Authors: Esper Claudine
Published: February 2023

La loi relative du 2 aout 2021 relative à la bioéhique met l’accent sur l’intérêt de la personne sur laquelle l’examen des caractéristiques génétiques est pratiqué, et sur celui des membres de sa famille potentiellement concernés si une anomalie génétique peut être responsable d’une affection grave justifiant de mesures de prévention ou de soins. Par une circulation renforcée de l’information génétique, le texte poursuit l’objectif de permettre aux proches de mieux bénéficier des mesures de protection et de soins. Pour cela, la loi adapte aux évolutions scientifiques la définition de l’examen des caractéristiques génétiques d’une personne. Elle permet la réalisation d’un examen génétique sur celui ou celle qui ne peut exprimer son consentement à cet examen, y compris en cas de décès. Plusieurs situations nouvelles sont traitées, tel que l’accouchement sous X. Les modalités de l’information sont revues et encadrées. Le texte traite aussi des découvertes génétiques incidentes sur une personne, au cours d’un examen réalisé à d’autres fins.
Belligérance et cobelligérance
Authors: Sur Serge
Published: February 2023

Depuis le 24 février 2022, Moscou insiste et voudrait faire croire que l’aide occidentale à l’Ukraine signifie une cobelligérance. Or, cela n’a pas de fondement juridique d’autant plus que les pays octroyant des armements à Kiev ont dès le début bien signifié qu’il n’y aurait pas d’engagement de troupes en soutien du pays agressé. Cela met cependant le droit international à l’épreuve au regard de cette guerre.
Les restructurations d’entreprises, le dispositif mis en place au sein de l’État
Authors: Cadiou Guillaume , Remy Olivier , Remy Olivier
Published: February 2023

Le retournement d’une entreprise est une matière complexe, à la croisée de compétences diverses en droit, finance et management. Les pouvoirs publics accompagnent ces situations de restructuration qui couvrent un champ d’action large, allant de la prévention jusqu’au traitement des difficultés, qui s’accompagne de la gestion des conséquences sociales et territoriales de celles-ci. C’est une mission originale pour des agents qui, animés d’une forte culture du résultat, traitent des situations individuelles. C’est aussi un dispositif qui a été éprouvé avec succès par les crises récentes, avec une intervention sans précédent de l’État. Dans les prochains mois, marqués par un contexte toujours aussi incertain, le défi sera de maintenir un accompagnement des entreprises intense et ciblé, tout en préservant les intérêts financiers publics.
Vingt ans de revitalisation : une responsabilité accrue au niveau local pour développer l’emploi durable sur les territoires
Authors: Lamand Maeva
Published: February 2023

Né en 2002, le dispositif de revitalisation des bassins d’emploi a pour objet de faire contribuer les entreprises, qui ont procédé à des licenciements économiques, à la recréation d’activité dans les territoires concernés par lesdites destructions d’emplois. Sa souplesse et la diversité des actions mobilisables font de ce dispositif un outil au service des territoires et adapté aux spécificités de chaque entreprise. L’obligation d’une revitalisation des bassins d’emploi dans le contexte économique actuel conserve toute son utilité. La crise sanitaire a accéléré les mutations de l’économie et a conduit, dans certains secteurs d’activité, à la mise en œuvre de restructurations ayant de forts impacts dans les territoires concernés. Cette obligation joue donc pleinement son rôle réparateur et permet de privilégier le financement d’actions visant à recréer des emplois durables. Les conventions signées entre l’État et les entreprises assujetties ciblent, en ce sens, un nombre croissant d’actions en lien avec la transition écologique, démontrant ainsi que ce dispositif s’adapte aux enjeux de notre temps.
Application of the flipped classroom model to stimulate university students’ learning with online education
Authors: Cuetos Maria Jose
Published: February 2023

This work sets out the results of a teaching innovation project applying the flipped classroom model in the Knowledge of Mathematics module on a bachelor’s degree in primary education over two consecutive years at a university that exclusively uses online teaching. This model is used with the aim of stimulating the students’ working methods and improve their intrinsic motivation. The research evaluates the impact of the flipped classroom on academic performance in the subject and collects information on student satisfaction with the development of the experiment. This is a pioneering study as it analyses learning outcomes with mathematical content in university-level classes delivered online synchronously on a permanent basis and not owing to exceptional circumstances such as the Covid-19 pandemic.To do this, specific videos were developed, which students had to watch, with various practical exercises embedded in them to be done before classes. The marks from these exercises along with the final grades for the course are considered to assess the learning outcomes throughout the semester. The results obtained were clearly positive both in performance and in terms of students’ motivation and awareness of their own learning process, as well as the contribution of this proposal to improving their teaching–learning process, essentially through greater student involvement in and commitment to the subject.
Sliding mode dynamics and optimal control for HIV model
Authors: Shi Dan , Ma Shuo , Zhang Qimin
Published: February 2023

Considering the drug treatment strategy in both virus-to-cell and cell-to-cell transmissions, this paper presents an HIV model with Filippov control. Given the threshold level $ N_t $, when the total number of infected cells is less or greater than threshold level $ N_t $, the threshold dynamics of the model are studied by using the Routh-Hurwitz Criterion. When the total number of infected cells is equal to $ N_t $, the sliding mode equations are obtained by Utkin equivalent control method, and the dynamics are studied. In addition, the optimal control strategy is introduced for the case that the number of infected cells is greater than $ N_t $. By dynamic programming, the Hamilton-Jacobi-Bellman (HJB) equation is constructed, and the optimal control is obtained. Numerical simulations are presented to illustrate the validity of our results.
La supervision des stages en enseignement des mathématiques au primaire et au secondaire : analyse des objets et des dynamiques d’interaction entre les acteurs de la formation
Authors: Bacon Lily , Saboya Mireille
Published: February 2023

In Quebec, practicum in teacher training alternates between moments of action in the classroom and analysis of these experiences by the trainee, the associate teacher and the university supervisor. Our involvement in the practicum as supervisors prompted us to become interested in what is addressed and discussed about mathematics teaching in the post-lesson interviews by the different actors in the training. From the analysis of two cases, there emerge convergent, complementary or divergent perspectives of the situations discussed and of what underlies a mathematics teaching activity recognised as relevant by the actors.
Interroger les pratiques de formation des professeurs de mathématiques : orientations de recherche et perspectives (un agenda)
Authors: Abboud Maha , Robert Aline , Rogalski Janine
Published: February 2023

In this text, we propose to question the mathematics teacher training practices and to draw up some orientations and perspectives for their study. We first present a very general overview of these training practices and of their diversity. Beyond these differences, and drawing on existing theoretical elements, we secondly present an approach for conducting research on the implementation of certain training programs. This could serve as means both for analyzing and developing practices during training sessions, as illustrated by two examples sketched on collective training of secondary mathematics teachers. Perspectives end this text, which, let us stress, is not based on actual data analyzes but on a hypothesis on the development of practices. We see it as an agenda for the researcher and the trainer in this emerging field of didactical research.
La projecció internacional de la literatura com a dinàmica activa de la difusió de la identitat catalana
Authors: Patricio Mulero Maria
Published: February 2023

La projecció internacional de la cultura catalana és una de les missions institucionals de Catalunya des de la recuperació de la democràcia. La intensificació de les accions per a difondre la cultura com a fet diferencial de la identitat catalana s’inicia des de finals dels anys vuitanta. No obstant, als inicis del segle XXI alguns esdeveniments concrets, com la Fira de Frankfurt del 2007 o la nominació de Barcelona com a Ciutat de la Literatura UNESCO el 2015 reafirmen i potencien la tasca realitzada per institucions que treballen estrictament a nivell internacional, com l’Institut Ramon Llull, o en una altra mesura la Generalitat de Catalunya o l’Institut de Cultura de Barcelona. En el present article revisarem els principals esdeveniments relacionats amb la projecció internacional de la literatura catalana durant el segle XXI, per tal d’entendre com aquestes accions de política estratègica esdevenen un motor essencial per potenciar la visibilitat de la cultura catalana com a identitat en l’àmbit global.
La internacionalización del proceso independentista catalán (2012-2017): motivos, acciones y balance
Authors: Manzano Guerrero Orlando
Published: February 2023

Le défi politique posé entre 2012 et 2017 par les dirigeants des partis nationalistes à la tête du gouvernement et du parlement autonome de la Catalogne, avec le soutien ou sous la pression de larges secteurs de la société civile catalane, visait la transformation effective de leur région en un État indépendant. Il a été promis que ce projet serait réalisé pacifiquement, dans le plein respect du cadre juridique existant et des principes démocratiques, à travers le dialogue et un consensus aussi large que possible, et sans jamais renoncer à la volonté de faire partie de l’Union européenne. Dans l’esprit de ses promoteurs, la construction d’un État catalan souverain, son intégration ultérieure dans les institutions internationales et – surtout – dans les instances européennes constituaient, en effet, des étapes incontournables d’un même projet. Pour maximiser les chances de succès, il était indispensable d’avoir l’aval des États membres et le soutien de la communauté internationale. Il n’est donc pas surprenant que la feuille de route conçue par les dirigeants politiques de la région pour parvenir à leurs fins comprenne des actions spécifiques visant à favoriser l’internationalisation du processus souverainiste. Au vu des résultats obtenus à cet égard, il convient de s’interroger sur leur efficacité. L’objectif de cet article est d’analyser ces aspects plus en détail.
COVID-19 and Working from Home: Determinants and Consequences of Work-Family and Family-Work Conflicts
Authors: Wickramasinghe Vathsala , Nakandala Isuri
Published: February 2023

The COVID-19 pandemic forced millions of employees worldwide to perform their full-time job tasks remotely from home. As creative performance is considered a desirable work outcome expected by organizations, the present study investigated whether the work-family and family-work conflicts mediate the relationship between job conditions experienced by employees while working from home and their creative performance. The study, carried out in Sri Lanka, featured a sample of employees in white-collar or professional positions who carried on with their full-time jobs during the COVID-19 pandemic working from home. It was found that job conditions (work characteristics, work environment and technical support) significantly negatively related to both work-family conflict and family-work conflict. In addition, the results supported the mediation hypothesis.
La Cour interaméricaine des droits de l’Homme consolide sa jurisprudence en matière de droit à la vie et de liberté d’expression
Authors: Chevalier Alicia
Published: February 2023

La Cour interaméricaine des droits de l’Homme revient sur les violations du droit à la vie, de la liberté d’expression ainsi que sur la pratique des disparitions forcées par le Mexique, le Brésil, l’Équateur, le Costa Rica, l’Uruguay et la Colombie. Bien que la plupart des affaires aient débuté dans les années 1980-1990, les problématiques abordées par la Cour demeurent d’actualité.
Aligning Teaching, Learning, and Assessment Anchored on E-Learning Platforms
Authors: Odhiambo Karen T.
Published: February 2023

The need for educators to respond to the Fourth Industrial Revolution (4IR), is characterized by competency-based curriculum (CBC)—education that is learner centered with new approaches to curriculum design, pedagogy, and technologies, thus e-learning. However, there is need for knowledge on how all these are aligned through education psychology, the convergence zone, and the platform for virtual learning. This is a process driven by an e-assessment for cognitive efficiency, higher levels of thinking, and metacognition. The author attempts to harmonize this knowledge by aligning the curriculum, pedagogy, assessment, and ICT. The author also proposes a conceptual model, which is derived from learning theories and dimensions, e-assessment attributes, and an e-learning platform towards lifelong and sustainable learning.
Electric Vehicles and Their Types
Authors: A. Vigneshwaran , K. A. Naveen Kumar
Published: February 2023

Electric vehicles are the only way to reduce greenhouse toxic gases. Electric vehicles, including battery vehicles, hybrid vehicles, plug-in hybrid vehicles, fuel cell electrical vehicles, are the most commonly used transports recently. There are some major obstacles for EV to overcome before totally replacing IC engine vehicles including EV configurations, battery energy sources, electrical machines, charging techniques, optimization techniques, impacts, trends, and possible directions of future developments. Currently, the battery technologies are moving from the lead-acid batteries to the lithium-ion. Moreover, different standards are available for charging process of the EV, including the power control and battery energy management proposals.
Autonomous Electric Vehicles and Edge Computing
Authors: Nallathambi Amuthan , Nallathambi Sivakumar , B. Gopal Samy
Published: February 2023

There is software that can be installed on a computer to control how an autonomous controller operates in a vehicle. The central processing unit (CPU) of the controller receives input from position sensors, processes that input, and then outputs operation control signals that indicate the updated course that the vehicle will take. A programming interface and operation controls are also included as parts of the controller. This interface helps to facilitate communication between the various controller components. Inputs from position sensors are normalized for the processor by the controller, which then sends outputs from itself as inputs into the operation control mechanisms. It is a stand-alone device that can be configured to function with a broad range of distant sensors and control mechanisms. As a direct consequence of the rapid spread of new technologies, edge computing has developed into a more widespread practice. Users may be able to have a more individualized and interactive experience in their day-to-day lives thanks to edge computing and edge devices.
Autonomous Vehicles Using OpenCV and Python With Wireless Charging
Authors: N. Raghu , V. N. Trupti , Badachi Chandrashekhar , M. Balamurugan , N. Md Firuz Mia , S. Ashok Kumar , Kannanugo Niranjan
Published: February 2023

The recent developments toward self-driving vehicles combined with advancement in electric vehicle technology have facilitated commencement of fully autonomous electric vehicles with respect to operation and energy requirements. Autonomous technology is about enriching automated systems with sensors, artificial intelligence (AI) and analytical capabilities so that decisions based on the data collected are independent. In autonomous vehicles, vision continues to be the primary source of data for lane detection, traffic signal detection, and other visual feature detection. Image classification and image localization are the two phases involved in object detection. An automobile prototype is designed which consists of open computer vision (Open CV) installed on a raspberry pi that can sense lane markings and navigate for safe driving. A demonstration of lane detection, color and shape detection using the open cv library has been produced in response to the issues autonomous vehicles that have object detection.
Role of Vitamin B12 and folate in metabolic syndrome – Current trends and future perspectives
Authors: Chandramahanti Kowshik , Chiratanagandla Akhila , Ammula Swarnadeep , Kommineni Bhargav Krishna
Published: February 2023

The metabolic syndrome (MS) refers to a collection of illnesses which together alleviate the potential risk of insulin resistance, atherosclerotic cardiovascular disease, diabetes mellitus, and vascular and neurological outcomes such as the cerebrovascular accident. Vitamin B12 is one of the major water-soluble vitamins found among the animal products such as the dairy products, eggs, and red meat. Folate is an essential nutrient which is naturally present among the foods in a stable reduced form and is present in an oxidized form (folic acid) among the fortified foods and dietary supplements. Homocysteine and methylmalonic acid levels in the blood are raised when Vitamin B12 is deficient, both of them can serve as indicators of deficiency of Vitamin B12 biochemical. Excess folate, primarily from the increased intake of folic acid, can interfere with the metabolism of cobalamin and exacerbates the Vitamin B12 deficiency symptoms, according to previous studies. Furthermore, the influence of supplementing Vitamin B12 and folate remains a largely uncharted field, hence, a lot more observational studies and randomized controlled trials are required to determine how vitamin supplementation affects each and every component of MS.
Design and implementation of a follow-up and training program of health-promoting lifestyle after the coronary artery bypass graft
Authors: Mansouri Zahra , Tayebi Ali , Khalili Robabe , Faizi Fakhrudin
Published: February 2023

BACKGROUND:

Coronary artery bypass graft (CABG) plays an important role in reducing coronary heart disease mortality, but patients are still at risk after surgery. Consequences can be avoided if threatening behaviors are soon detected and lifestyles are promoted. Therefore, the present study aimed to evaluate, follow-up, and promote a healthy lifestyle in the patients.

MATERIALS AND METHODS:

The present research was a quasi-experimental pre- and postintervention single-group study on 35 patients under the CABG at two hospitals affiliated to the Baqiyatallah University of Medical Sciences in Tehran from August 2020 to April 2021. The samples were selected using the purposive sampling method and the educational content was determined by creating an expert panel. We utilized the Health-promoting Lifestyle Profile II to collect data, and SPSS 22 to analyze them.

RESULTS:

There was a significant difference between mean total scores of health-promoting lifestyle before and after the intervention and they reached from 138.7 ± 20 to 157.2 ± 18 (P < 0.0001). There was also a statistically significant difference between mean scores of nutrition (P < 0.003), physical activity (P < 0.0001), health responsibility (P < 0.0001), and stress management (P < 0.0001) before and after the intervention, but there was no statistically significant difference between mean scores of interpersonal relationships, and spiritual growth before and after the intervention.

CONCLUSIONS:

The program had a positive effect on the health-promoting lifestyle scores of patients after CABG. It is possible to increase scores of healthy lifestyles in the patients by combining face-to-face and virtual training methods as well as involving family members and relatives of patients in training and follow-up programs.
Perfectly packing a cube by cubes of nearly harmonic sidelength
Authors: McClenagan Rory
Published: February 2023

Let d be an integer greater than
$1$
, and let t be fixed such that
$\frac {1}{d} < t < \frac {1}{d-1}$
. We prove that for any
$n_0$
chosen sufficiently large depending on t, the d-dimensional cubes of sidelength
$n^{-t}$
for
$n \geq n_0$
can perfectly pack a cube of volume
$\sum _{n=n_0}^{\infty } \frac {1}{n^{dt}}$
. Our work improves upon a previously known result in the three-dimensional case for when
$\frac {1}{3} < t \leq \frac {4}{11} $
and
$n_0 = 1$
and builds upon recent work of Terence Tao in the two-dimensional case.
Diffeomorphisms of scalar quantum fields via generating functions
Authors: Mahmoud Ali Assem , Yeats Karen
Published: February 2023

We study the application of formal diffeomorphisms to scalar fields. We give a new proof that interacting tree amplitudes vanish in the resulting theories. Our proof is directly at the diagrammatic level, not appealing to the path integral, and proceeds via a generating function analysis, so it is more insightful than previous proofs. Along the way, we give new combinatorial proofs of some Bell polynomial identities, and we comment on the connection with the combinatorial Legendre transform.
The Role of Graphene in Achieving e-Mobility in Aerospace
Applications
Authors: Barkan Terrance
Published: February 2023

Advanced two-dimensional (2D) materials discovered in the last two decades are now
being produced at scale and are contributing to a wide range of performance enhancements
in engineering applications. The most well-known of these novel materials is graphene,
a nearly transparent nanomaterial comprising a single layer of bonded carbon atoms.
In relative terms, it has the highest level of heat and electrical conductivity, protects
against ultraviolet rays, and is strongest material ever measured. These properties have
made graphene an attractive potential material for a variety of applications, particularly
for transportation related uses, and especially for aerospace engineering.

The Role of Graphene in Achieving e-Mobility in Aerospace Applications reviews the current
state of graphene-related aerospace applications and identifies the technological challenges
facing engineers that look to benefit from graphene’s attractive properties.

Click
here to access the full SAE EDGETM
Research Report portfolio.
Upper Mantle Anisotropy beneath Northern Algeria from Shear-Wave Splitting: Anisotropy beneath Northern Algeria
Authors: Radi Zohir , Chaouche Abdelkarim Yelles , Guettouche Salim , Bokelmann Gotz
Published: February 2023

Northern Algeria is a large region in the north-western of Africa, lying on the collision boundary between the African and Eurasian plates. Few studies on Lithosphere and Mantle deformation have been conducted in this region. To better understand the seismic anisotropy patterns beneath this area, we used data from 17 broadband stations installed in Tellian and the Saharan atlases using the SKS shear wave splitting method by processing hundreds of teleseismic events. To estimate the seismic anisotropy, two parameters were calculated, the fast polarization direction and the delay time for each station-event pair. The results show that the seismic anisotropy can be described by two main orientations, ENE-WSW follows the general trend of the Saharan Atlas, particularly in the central and western parts, and ESE-WNW follows the Hodna Mountains in south-eastern Algeria. Our results show that the anisotropy can be explained by single and heterogeneity in the anisotropic structure, where the measurements are very scattered, and the delay time and fast direction changed with the events backazimuth. In the ABSD, CBBR and CDCN stations, which lie in the arc between the Sahara Atlas and the Aurès Mountains, the origin hypothesis of the seismic anisotropy can be linked to the existence of a detached slab. Moreover, in ABZH, OKGL and EARB stations located in the Kabylide and Western regions, it can be associated with the Gibraltar slab. Both slabs sinking in the African margin mantle were previously imaged by seismic tomography. For the remaining stations, the single-layer best explains the observed seismic anisotropy from their regular fast polarization direction. The comparison of the obtained fast directions with GPS measurements shows that anisotropy fast axes are nearly perpendicular to the convergence direction between the African and Eurasia plates.
Countdown games, and simulation on (succinct) one-counter nets
Authors: Jancar Petr , Osicka Petr , Sawa Zdenek
Published: February 2023

We answer an open complexity question by Hofman, Lasota, Mayr, Totzke (LMCS
2016) for simulation preorder on the class of succinct one-counter nets (i.e.,
one-counter automata with no zero tests where counter increments and decrements
are integers written in binary); the problem was known to be PSPACE-hard and in
EXPSPACE. We show that all relations between bisimulation equivalence and
simulation preorder are EXPSPACE-hard for these nets; simulation preorder is
thus EXPSPACE-complete. The result is proven by a reduction from reachability
games whose EXPSPACE-completeness in the case of succinct one-counter nets was
shown by Hunter (RP 2015), by using other results. We also provide a direct
self-contained EXPSPACE-completeness proof for a special case of such
reachability games, namely for a modification of countdown games that were
shown EXPTIME-complete by Jurdzinski, Sproston, Laroussinie (LMCS 2008); in our
modification the initial counter value is not given but is freely chosen by the
first player. We also present an alternative proof for the upper bound by
Hofman et al. In particular, we give a new simplified proof of the belt theorem
that yields a simple graphic presentation of simulation preorder on
(non-succinct) one-counter nets and leads to a polynomial-space algorithm
(which is trivially extended to an exponential-space algorithm for succinct
one-counter nets).
Thermal calibration of an existing institutional building
Authors: Lucarelli Caio de Carvalho , Oliveira Matheus Menezes , Carlo Joyce Correna
Published: February 2023

Building performance simulation (BPS) exhibits an interplay of various physical parameters, only portraying limited building fundamental characteristics. Therefore, BPS calibration can increase simulation accuracy and better depict the physical space. We aimed to calibrate/validate an institutional building model in Viçosa-MG, testing parallel and serial uncertainty procedures. We conducted a manual/statistic hygrothermal calibration using surveyed indoor/outdoor air dry-bulb temperature (DBT) and relative humidity (RH). We evaluated site-specific weather files and compared simulation outputs and measured data using the Root Mean Square Error (RMSE). As a result, the validated model presented 0.56°C to 0.85°C DBT discrepancies and 3.10% to 5.90% RH differences.
Utilização do BIM como apoio à simulação para análise do desempenho das edificações:
Authors: Santos Julia dos , Alcântara Bárbara , Souza Wesley , Salgado Mônica
Published: February 2023

Este trabalho visa identificar as diferentes áreas que utilizam simulação com o apoio da plataforma BIM (Building Information Modeling) e entender quais softwares de simulação são usados nestas pesquisas. O presente trabalho aplicou o método de Revisão Sistemática da Literatura utilizando as bases de dados Scopus e Web of Science que foram consultadas no período entre 2012 e 2021. Após a aplicação dos critérios de refinamento, obteve-se uma lista de 22 artigos para leitura Fullpaper, que posteriormente foram separados em oito enfoques principais. Esta pesquisa revela que a inserção do BIM para estudo do desempenho do edifício é recente e nota-se a ausência de trabalhos desenvolvidos por pesquisadores brasileiros na amostra de artigos selecionados para leitura por artigo completo.
Modelo representativo para a tipologia de supermercados de médio porte na região Sudeste do Brasil
Authors: Rodrigues Thiago toledo viana , Carlo Joyce correna
Published: February 2023

A maioria das pesquisas em eficiência energética são feitas para edifícios residenciais e/ou de escritórios. Supermercados ainda são pouco abordados, apesar do elevado consumo energético. Conhecer o consumo típico da tipologia ajuda na tomada de decisão em relação às estratégias energeticamente eficientes. O objetivo deste artigo é criar um modelo representativo para a tipologia de supermercados no Brasil. O método inclui a análise de imagens de satélites para levantar as características construtivas de uma amostra de 229 supermercados. As características com maior frequência de ocorrência foram adotadas no modelo representativo, que será usado para simulações paramétricas em uma próxima etapa.
A fotografia como fonte histórica de pesquisa: um estudo sobre as transformações da paisagem urbana do Bairro Farrapos em Porto Alegre/RS
Authors: Monteiro Deyvid Aléx de Bitencourt , Miron Luciana Inês Gomes
Published: February 2023

Este artigo tem como objetivo propor uma discussão acerca do potencial e das delimitações de imagens fotográficas como fontes históricas para o registro de transformações na paisagem urbana, especificamente, do Bairro Farrapos, localizado na cidade de Porto Alegre/RS. O estudo empírico envolveu a coleta e a análise de registros fotográficos de distintos momentos do Bairro: o momento anterior (2001), de entrega (2002) e posterior à implantação do Programa Integrado Entrada da Cidade - PIEC (2015). Dentre as principais contribuições desta pesquisa está a identificação do potencial dos registros fotográficos como fontes históricas para o registro de significativas transformações na paisagem urbana do Bairro Farrapos.
Captura de CO2 em argamassas de revestimento: avaliação de cenários
Authors: Fontolan Beatrice Lorenz , Gava Giovanna Patrícia , Possan Edna
Published: February 2023

Avalia-se a captura de CO2 devido à carbonatação natural em argamassas de revestimento com distintos teores de cal hidratada, considerando espessuras de aplicação de 10 a 80 mm. Dados de profundidade de carbonatação ao longo do tempo de amostras em ambiente externo protegido foram usados na modelagem. A avaliação do teor de carbono fixado foi conduzida via termogravimetria. Tem-se que quanto maior o teor de cal, menor a velocidade de difusão e maior o teor de CO2 fixado. Espessuras de revestimento maiores que 20 mm demandam tempos superiores a 3 meses para o esgotamento da capacidade de fixação de carbono.
Fontes internas de vantagem competitiva vinculadas com a Construção 4.0 em empresas de construção
Authors: Zimmermann Joana , Oviedo-Haito Ricardo Juan José
Published: February 2023

Apesar de os benefícios discutidos na literatura relacionados com a Construção 4.0, pouco se sabe sobre as fontes internas de vantagem competitiva (FIVC) associados com ela. Nesse sentido, objetiva-se caracterizar as FIVC vinculadas com a Construção 4.0 em empresas de construção.  Para tanto, conceitos associados com a Construção 4.0 foram extraídos de fontes bibliográficas, analisados, categorizados e ordenados. De tal modo caracterizaram-se dois possíveis caminhos para a obtenção de FIVC relacionadas com a Construção 4.0. Estes caminhos vinculam-se às capacidades obtidas pela industrialização da construção e às capacidades resultantes de recursos e estratégias relativas à Indústria 4.0.
Covid-19 em canteiros de obras de pequeno porte: estudo de caso com construtoras cearenses
Authors: Andrade Jonas Elias de , Cândido Luis Felipe , Barros Neto José de Paula
Published: February 2023

Esse estudo teve como objetivo analisar como a saúde e segurança do trabalho (SST) em canteiros de Obras de Pequeno Porta durante a retomada de atividades na pandemia. Para tanto, realizou-se um estudo de caso com três microempresas, o que permite evidenciar as mudanças realizadas, as dificuldades e oportunidades de melhoria. As mesmas dificuldades de gestão de SST de antes da pandemia continuaram e tiveram na pandemia um aumento no risco aos operários. Isso implica na necessidade de aprimoramento dos protocolos setoriais introduzindo medidas simples que contemplem esse tipo de obra.
Série histórica versus ano meteorológico típico: Desempenho térmico de modelo unifamiliar com três alternativas de envoltória em Brasília
Authors: Bracht Matheus Körbes , Costa Vanessa Aparecida Caieiro da , Melo Ana Paula , Lamberts Roberto
Published: February 2023

O trabalho consiste na simulação do desempenho térmico de uma edificação, considerando uma série histórica de Brasília em comparação a um arquivo de ano meteorológico típico (TMY) e o arquivo climático INMET utilizado na NBR15575. Esses arquivos são usados como dados de entrada para simulações termo energéticas de uma edificação unifamiliar com três diferentes envoltórias. Foi possível observar o aumento de temperaturas durante a série histórica, assim como o aumento de carga térmica de resfriamento e temperaturas operativas máximas em todos os casos. Notou-se uma divergência significativa entre os resultados encontrados da série histórica com os do arquivo climático INMET.
Ferramenta ACV aplicada em retrofit de edificações: uma revisão sistemática
Authors: Pretto Biasi Bárbara , Bertuol Daniela , Badalotti Passuello Ana Carolina
Published: February 2023

O processo de retrofit de edificações pode ser uma opção sustentável para o reaproveitamento de edificações e a mitigação de impactos ambientais. O objetivo do estudo é realizar uma revisão sistemática de literatura sobre o tema de ACV aplicada em retrofit, buscando analisar as contribuições e os métodos considerados. O estudo parte de 27 artigos publicados em periódicos internacionais, estruturados como estudos de caso e revisões sistemáticas. Nota-se que o retrofit de edificações oportuniza o aproveitamento de edificações existentes, a implementação de estratégias sustentáveis e, também, o desenvolvimento de mais estudos no âmbito científico nacional.
Procedimentos metodológicos para avaliação pós-ocupação em UBSs no município de Santos-SP. A perspectiva dos usuários.
Authors: Silva Everton Cesar dos Santos , Ornstein Sheila Walbe
Published: February 2023

As Unidades Básicas de Saúde (UBS) oferecem serviços de prevenção de doenças e promoção à saúde em diferentes territórios. Neste estudo, realizou-se uma Avaliação Pós-Ocupação nos ambientes de duas UBSs na cidade de Santos-SP. Os resultados demostram que as UBSs construídas apresentam limitações relacionadas à acessibilidade, fluxos, flexibilidade, climatização e manutenção. Os aspectos identificados devem ser observados como diretrizes para intervenções e novos projetos. Busca-se incentivar arquitetos e gestores a adotarem o codesign, envolvendo a equipe de saúde no desenvolvimento de projetos mais eficientes. Como limite do estudo, considerou-se apenas os resultados parciais obtidos pelo walkthrough e entrevistas semiestruturadas.
Análise comparativa do desempenho térmico em edifício histórico segundo dois algoritmos de cálculo de condução térmica
Authors: Da Rocha Macarthy Maritza , Coutinho Bernardes Luiza , Mesquita Duarte Carolina de , Andreola Beber Luciane , Campos Grigoletti Giane de , Grala da Cunha Eduardo
Published: February 2023

Este estudo tem o objetivo de apresentar uma análise comparativa do comportamento higrotérmico das paredes de alvenaria de uma edificação histórica do século XIX, localizada em Pelotas, RS, na zona bioclimática (ZB2). A análise é realizada através de simulações executadas nos softwares EnergyPlus e Wufi Pro considerando os algoritmos de Transferência de Calor e Umidade e Condução e Convecção, para uma edificação ventilada naturalmente. Os resultados demonstraram que o desempenho higrotérmico do sistema construtivo é um pouco melhor com membrana hidrófuga, e que os dois algoritmos apresentam comportamento semelhantes, no entanto, as paredes da edificação histórica não apresentam resultados satisfatórios.
Análise longitudinal do consumo de energia elétrica do setor residencial no Brasil
Authors: Geraldi Matheus , Bavaresco Mateus , Melo Ana Paula , Lamberts Roberto
Published: February 2023

Este estudo objetivou determinar o consumo típico de eletricidade por unidade habitacional no Brasil. Explorou-se a base de dados da ANEEL (de 2003 a 2020), avaliando-se o consumo total e o número de unidades. Obteve-se valores de referência do consumo de eletricidade nas residências para cada ano e região. Determinou-se a taxa de crescimento do consumo anual no intervalo analisado e o índice de sazonalidade do consumo mensal. Os resultados apontaram que o crescimento do consumo total se deve principalmente ao aumento da quantidade de unidades, e que há forte presença de sazonalidade no consumo anual das residências no Brasil.
Condições de contorno externo de paredes internas: simular uma zona térmica adiabática ou integrada ao pavimento?
Authors: Martins Pinto Mônica , Simon Westphal Fernando
Published: February 2023

Estudos paramétricos de desempenho de edifícios frequentemente utilizam condições de contorno adiabáticas nas paredes internas. Entretanto, não foram encontrados estudos que verificassem o impacto desta configuração nas condições térmicas do ambiente, quando utilizando o software EnergyPlus. O presente estudo pretende verificar a adequabilidade do uso de modelo de sala adiabática no estudo paramétrico de desempenho térmico da envoltória. Compararam-se as condições térmicas e consumo para condicionamento de uma zona quando simulada isoladamente ou integrada ao pavimento. Verificou-se que não é necessário simular um pavimento ou prédio inteiro quando o objetivo da simulação for avaliação paramétrica.
Avaliação do impacto financeiro das atividades de manutenção de sistemas prediais hidrossanitários em edificações públicas recém entregues
Authors: Morais Lucas Salomão Rael de , Paula Heber Martins de , Reis Ricardo Prado Abreu
Published: February 2023

O baixo desempenho de edificações somado a falta de manutenção resultam em custos de operação e manutenção excessivos. Neste trabalho avaliou-se o impacto financeiro das atividades de manutenção de sistemas prediais hidrossanitários (SPHS) recém construídos em relação ao seu custo construtivo. Para tanto, foram avaliados os registros de manutenção de três edifícios, catalogando as demandas de manutenção dos 5 primeiros anos de operação. Os resultados apontam que em 5 anos, a maioria desses edifícios já haviam consumido aproximadamente 30% do valor de construção com intervenções de manutenção, índice elevado que indica fragilidades nos processos construtivos e de manutenção.
Proposta de modelo probabilístico para avaliar o conforto ambiental interno de ambientes
Authors: Bortolini Rafaela , Vecchia Luisa Rodrigues Félix Dalla , Rodrigues Raul Balbinoti
Published: February 2023

Este trabalho adapta um modelo probabilístico que tinha o objetivo de avaliar o conforto ambiental interno de uma edificação. A adaptação proposta muda o foco para um ambiente específico, e aprimora o modelo considerando a coleta de dados monitorados por sensores, tornando a entrada de dados mais complexa. Para tanto, as variáveis do modelo e as relações de causalidade entre elas foram revistas. Além disso, intervalos dos possíveis estados de algumas variáveis foram definidos com base em uma revisão de literatura e normatizações. Os resultados incluem o modelo e uma discussão sobre sua aplicabilidade na criação de um Gêmeo Digital.
Implementação de um sistema de aquecimento e resfriamento radiante-capacitivo (RC-HCS) em uma câmara climática
Authors: González Cruz Eduardo Manuel , Krüger Eduardo , Carraro Fabricio , Moraes De Bem Gabriel , Moreira de Abreu Alexandre Augusto , Trento Daniel
Published: February 2023

O objetivo deste trabalho é apresentar os resultados iniciais da avaliação do sistema de aquecimento e resfriamento radiante-capacitivo de baixo consumo de energia aplicado em uma câmara climática. O sistema se baseia no uso de módulos radiantes-capacitivos que, por meio de um circuito hidráulico, utilizam-se do resfriamento radiativo noturno e aquecimento solar. Detalha-se os componentes do sistema e analisam-se os resultados de seu funcionamento em modo de resfriamento e aquecimento, guiado por um sistema de controle. Foram encontrados importantes potenciais de resfriamento e aquecimento que permitem manter as condições de conforto térmico na maior parte do tempo.