bluuebunny/crossref_metadata_2025 huggingface dataset:
Biodiesel Production from Used Cooking Oil Using Integrated Double Column Reactive Distillation: Simulation Study
Authors: Ratna Dewi Kusumaningtyas  , Andre Dianata Hogi Kusuma  , Yoshua Wira Putra Budiono  , Haniif Prasetiawan  , Pragusti Lintang Adhi Nanggala  , I Istadi
Published: May 2022

Dependency on fossil – based energy has become a global problem. Indonesia has started a movement in changing energy sources from fossil to new and renewable energy. Biodiesel is one of the renewable energy sources. Used cooking oil is one of the prospective feed-stock in biodiesel production. Used cooking oil contains 21.84% free fatty acid and 78.16% triglycerides. This study simulated the production of biodiesel from used cooking oil using the Aspen Plus v10 software. The production system used an Integrated Double Column Reactive Distillation (IDC-RD) system. The thermodynamic method employed in the simulation system was UNIQUAC. This study used the sensitivity analysis function in the Aspen Plus v10 application to analyze the effect of reflux ratio, the bottom to feed ratio, and the methanol to oil ratio on the reaction conversion. The reflux ratio applied in the simulation was 0.5 – 200, the bottom to feed ratio was 0.25 - 0.9, and the methanol to oil ratio was 1: 3 - 9:8. It was found that the esterification column with a reflux ratio of 0.5, a bottom to feed ratio of 0.5, and a methanol-oil ratio of 4: 1 resulted in a conversion of 96.59%. It was also demonstrated that the transesterification column with a reflux ratio of 0.5, a bottom to feed ratio of 0.5, and a methanol-oil ratio of 3: 1 resulted in a conversion of 99.98%.
Thermal and Durability Properties of Sustainable Green Lightweight Foamed Concrete Incorporating Eco-Friendly Sugarcane Fibre
Authors: Md Azree Othuman Mydin
Published: May 2022

Efforts to modify cement-based mixtures have always enticed the interest of researchers. Lightweight foamed concrete is immensely porous, and its properties diminish with increasing in the number of pores. To enhance its properties, the solid matrix of LFC can be attuned by integrating numerous natural fibres. The influence of eco-friendly sugarcane fibre in LFC was not investigated before in the current body of knowledge. Hence, there is some ambiguity considering the mechanism by which and the extent to which the sugarcane fibre can influence LFC properties. Therefore, this study concentrates on distinguishing the potential use of sugarcane fibre into lightweight foamed concrete. This study aims to determine the durability and thermal properties of LFC with the addition of sugarcane fibre. Low density of 800kg/m3 were cast and tested. Different weight fractions of sugarcane fibre of 0.15%, 0.30%, 0.45% and 0.60% were used. For durability properties, four parameters were appraised such as water absorption capacity, porosity, drying shrinkage, ultrasonic pulse velocity. While for thermal properties were assessed which were thermal conductivity, thermal diffusivity and specific heat capacity. Protein-based foaming agent Noraite PA-1 was utilized to produce the desirable density of LFC. To get the comparable results, the water to cement ratio was fixed to 0.45 while the cement to sand ratio constant at 1:1.5. The results had indicated that the addition of 0.45% of sugarcane fibre gave the optimum results for all the durability and thermal properties considered in this research. At 0.45% weight fraction of SF, the fibres and the cementitious matrix achieved maximum compaction, which stemmed in excellent mix homogeneity. Beyond the optimum level of sugarcane fibre inclusion, agglomeration and the non-uniform dispersion of fibres was observed, which led to decrease in entire durability and thermal properties appraised.
Development of a Small-Scale Electricity Generation Plant Integrated on Biomass Carbonization: Thermodynamic and Thermal Operating Parameters Study
Authors: Baharuddin  , Janter Pangaduan Simanjuntak  , Eka Daryanto  , Bisrul Hapis Tambunan  , Hanapi Hasan  , Samsudin Anis  , Mochamad Syamsiro
Published: May 2022

Biomass has been known as a source of energy with a thermochemical process that produces heat and can be converted further into electricity. However, thermal energy losses are a huge problem during combustion. To overcome this problem, a system based on organic Rankine cycle (ORCs) was developed to recover and utilize them to generate electricity. The proposed ORCs include an evaporator, a turbine, a condenser, and a pump coupled with a biomass carbonizing system to create a promising technology for small-scale electricity generation. In this work, a thermodynamic modelling equation based on energy and exergy balances was briefly expressed for each subcomponent of the system. A case study with R134a as the working fluid is being investigated to validate the system’s performance. In addition to the effects of R134a on temperature at the turbine exit, the suitable operating pressures has been specially adopted from several valid journals that focused on the effects of a wide range of possible operating pressure on the working fluid characteristics, which have a significant effect on the system performance. Finally, the theoretical analysis shows that the turbine work is profitable at an inlet pressure of 5 bar and an outlet pressure of 2 bar. This system is recommended to be integrated into the thermochemical biomass process. Recommendations have been made for the future development of small-scale biomass-fuelled power generation systems. This study shows that the thermal losses of the biomass thermochemical processes can be theoretically recovered in the form of electricity by using ORC efficiently.
Síndrome de Swyer y disgerminoma. Caso clínico
Authors: Sánchez Kayra , Lasso de la Vega Jorge
Published: May 2022

El síndrome de Swyer es una disgenesia gonadal pura con fenotipo femenino y cariotipo XY. Las pacientes presentan unas gónadas disgenéticas y no funcionantes. El riesgo de neoplasia gonadal es alto, entre un 25 y un 30%. El gonadoblastoma y el disgerminoma son los tumores más frecuentes. Presentamos el caso de una femenina de 18 años con historia amenorrea primaria, con masa anexial derecha compleja asociada a elevación de alfafetoproteína en sangre. Se le realiza salpingooforectomía, en donde se encontró masa de 15 cm dependiente del ovario derecho y estría fibrótica en ovario izquierdo. La revisión de la pieza quirúrgica reportó un tumor germinal mixto. Cariotipo de la paciente XY. Hallazgos consistentes con Síndrome de Swyer.
Pancreatitis necrotizante por organofosforados: de la sospecha clínica al tratamiento oportuno - reporte de un caso
Authors: Salehji Bhana Abdullah
Published: May 2022

Introducción: La intoxicación con organofosforados se ha descrito como causa poco frecuente de pancreatitis aguda. En la literatura, son escasos los reportes de casos de esta asociación y el mecanismo fisiopatológico que lleva al desarrollo de necrosis en esta situación, está aún menos estudiada. Por esta razón presentamos este caso de esta inusual asociación.
Presentación de caso: masculino de 45 años que es llevado por familiares a hospital de segundo nivel por cuadro clínico compatible con intoxicación por organofosforados. Desde el ingreso con niveles elevados de amilasa y ultrasonido abdominal sin datos sugestivos de pancreatitis, sin embargo, con dolor abdominal típico que mejora progresivamente con el manejo conservador instaurado. A pesar de esto, inicia con datos de disfunción pancreática y en la tomografía computarizada se reporta necrosis de >90% de la estructura pancreática, compatible con pancreatitis aguda necrótica. Al no haber datos de infección sistémica, se ofrece manejo conservador con adecuada respuesta.
Conclusión: la pancreatitis es una complicación que debe ser buscada en pacientes con intoxicación por organofosforados, ya que el tratamiento oportuno mejora significativamente el pronóstico.
For the Public Good: Incorporating Civic Science into Undergraduate STEM Education
Authors: Ross Christian , Jo Fried Samantha
Published: May 2022

Science and technology are ubiquitous aspects of modern life, and their importance reaches far beyond the laboratory and into the public square. Those with STEM training have a distinct opportunity and responsibility as civic participants to apply their training to promote the public good by engaging with the civic dimensions of science and technology. However, civic engagement is difficult to do well, and current undergraduate STEM education does not adequately train students in these critical skills. To improve STEM graduates’ understanding of science and technology in broader societal contexts, enhance their science communication skills, and increase their civic engagement and competency, universities should adopt a civic science approach to STEM education. Drawing on an example from the Science and Technology and Society co-major program at Tufts University, we recommend universities and STEM departments incorporate training in civic science into STEM education to prepare STEM graduates to engage more fully with the technical and political dimensions of democratic life.
Colors of Irregular Satellites of Saturn with the Dark Energy Camera
Authors: Peña José , Fuentes Cesar
Published: May 2022

We report g − r and r − i new colors for 21 Saturn Irregular Satellites; among them, four previously unreported. This is the highest number of Saturn Irregular satellites reported in a single survey. These satellites were measured by “stacking” their observations to increase their signal without trailing. This work describes a novel processing algorithm that enables the detection of faint sources under significant background noise and in front of a severely crowded field. Our survey shows these new color measurements of Saturn Irregular Satellites are consistent with other Irregular Satellites populations as found in previous works and reinforcing the observation that the lack of ultrared objects among the irregular satellites is a real feature that separates them from the trans-Neptunian objects (their posited source population).
The Coherent Differential Imaging on Speckle Area Nulling (CDI-SAN) Method for High-contrast Imaging under Speckle Variation
Authors: Nishikawa Jun
Published: May 2022

Differential imaging is a postprocessing method to obtain high contrast, often used for exoplanet searches. The coherent differential imaging on speckle area nulling (CDI-SAN) method was developed to detect a faint exoplanet lying beneath residual speckles of a host star. It utilizes image acquisitions faster than the stellar speckle variation synchronized with five shapes of a deformable mirror repeatedly. By using only the integrated values of each of the five images and square differences for a long interval of observations, the light of the exoplanet could be separated from the stellar light. The achievable contrast would reach almost the photon-noise limit of the residual speckle intensities under appropriate conditions. CDI-SAN can be applied to both ground-based and space telescopes.
Unilateral hyper-translucent lung: a rare case report of bronchial atresia
Authors: Sachdeva Ruchi Arora , Dawar Sachet , Parashar Deepali , Nagar Sunil
Published: May 2022

A young female patient with chronic left side chest pain warranted a work-up. Chest X-ray suggested left hyper-translucency. High resolution computed tomography scan revealed left atretic apicoposterior segmental bronchus with an area of hyper-translucency suggestive of bronchial atresia. Fiberoptic bronchoscopy findings were normal. Spirometry showed moderate restriction with mild obstruction. It is a rare developmental anomaly characterised by interruption of normal bronchial continuity. Most commonly, it involves the apicoposterior segmental bronchus of left upper lobe as seen in our case. Since it is a benign condition, surgical treatment or any aggressive method of treatment is not required. However, intervention may be required in case of life threatening complications.
Uterine angiolipoleiomyoma. A case report and systematic literature review
Authors: Psomiadou Victoria , Iavazzo Christos , Geramani Eirini , Fotiou Alexandros , Karelis Loukas , Valavanis Christos , Lekka Sofia , Kokkali Kalliopi , Vorgias George
Published: May 2022

Uterine angiolipoleiomyomas are rare, benign mixed mesenchymal lesions. A manifestation in the gynecological region is quite uncommon, with few cases described in the literature so far. We present an interesting case of a 59-year-old woman diagnosed with uterine angiolipoleiomyoma, and the results of the conducted systematic review of the literature. The patient presented with a pelvic mass masquerading as a leiomyoma on the ultrasound and postmenopausal vaginal bleeding. At laparotomy, a large uterus was noticed and the histopathology set the diagnosis of angiolipoleiomyoma. Immunohistochemistry revealed negativity for Melan-A and HMB-45 melanoma-specific antibodies and positivity for Van Gieson and orcein histochemical stains.

We systematically reviewed the literature. The eligible articles were those written in English, excluding animal studies and studies reporting angiolipoleiomyomas in other regions beside the uterus. The present case is one of the 10 cases of uterine angiolipoleiomyoma reported in the literature. In 8 out of 11 (72.7%) cases, uterine angiolipoleiomyomas arose from the corpus of the uterus, while in 2 (18.1%) cases they were located at the cervix, and in one case (9%) angiolipoleiomyoma was located in the broad ligament. Concerning symptoms, four of the patients (36.4%) presented with abdominal and pelvic pain, two (18.1%) with postmenopausal vaginal bleeding, one with menometrorrhagia (9%), and one with uterine prolapse and cystocele (9%). Immunohistochemical staining of uterine angiolipoleiomyomas was positive for SMA in 4 patients (36.4%), positive for desmin in 3 cases (27.3%), positive for anti-S-100 protein antibody in 2 patients (18.1%), while in one case (9%) immunopositivity was observed for CD31. Only our case (9%) was also tested for CD34, Van Gieson and orcein, the first of these being negative and the other two positive (at the blood vessels in a specialized pattern). Three of the patients (27.3%) were also tested for HMB-45 and all three were immunonegative.

In order to establish the diagnosis of uterine angiolipoleiomyomas, ultrasonography and additional MRI may help the preoperative prediction of a benign mass. Immunohistochemistry will show strong positivity of alpha-smooth muscle actin and desmin. Complete abdominal hysterectomy is the preferable treatment.
A rare case report of Edwards syndrome with immature teratoma in submandibular region and literature review
Authors: Gerakova Elena , Genova Sylvia
Published: May 2022

Trisomy 18 (Edward syndrome) was first described by Edwards et al. in 1960. The condition is the second most common autosomal trisomy syndrome in males. The prevalence in infants is estimated as 1/6000-1/8000. Those affected have a high mortality rate – only 4% may survive their first year.

The study illustrates the first reported case of Edwards syndrome with immature teratoma in submandibular region.

A 33-year-old multigravida had a normal antenatal course until 36 weeks of gestation. Two hours after delivery, the baby was transported to a neonatal ward, where several malformations were described: a tumour formation the size of a walnut in the right submandibular region, ear abnormality, micrognathia with high arched palate, overlapping fingers, and feet deformities. A genetic test was performed which confirmed trisomy 18. After 26 days of assisted ventilation and oxygen therapy, the newborn developed hyaline-membrane disease, dilatation of the pulmonary artery and the right side of the heart, thrombosis of the right atrium and these conditions were determined to be the cause of death.

The autopsy and histological examination confirmed the aforementioned malformations finding also a kidney with duplicated collecting system on the right and ectopic ureter in the left kidney. The submandibular tumour was determined to be immature teratoma.

Conclusion: This is the first presented case in the literature of a newborn with Edwards syndrome combined with immature teratoma.
Treatment of gingival recession with hypersensitivity using free soft-tissue graft procedures
Authors: Emilov Denislav K. , Deliverska-Aleksandrova Elitsa G.
Published: May 2022

Introduction: The main goal of root coverage procedure is complete coverage of the recession defect with good esthetic results related to the adjacent soft tissues and minimal probing depth after the healing process.

Aim: The aim of this study was to compare the efficiency of surgical and nonsurgical treatment options in patients with gingival recession and dentin hypersensitivity.

Materials and methods: Sixty patients with gingival recession Miller Class I and II with hypersensitivity and esthetic concerns were included. Of these, 30 patients were treated with free soft-tissue graft procedures and 30 people as controls were treated with anti-hypersensitivity gel. The surgically treated patients were allocated into two groups: 20 of them with coronally advanced flap with subepithelial connective tissue graft and 10 with free gingival graft.

Results: We achieved full coverage on the exposed root surfaces in 19 patients treated with coronally advanced flap and de-epithelized graft and partial root coverage in one of them.

Patients treated with free gingival graft procedure achieved full root coverage in 7 of them and partial in 3 of them (gingival recession = 1 mm after surgery). The surgical treatment allowed resolution of the esthetic issues of patients and elimination or reduction of the dentin hypersensitivity. In the control group, there was partial elimination of root sensitivity.

Conclusions: In the surgically treated group with both techniques, we achieved resolution of dentin hypersensitivity and coverage of the root surface with healthy keratinized tissues. These techniques can be considered as treatment options for dentin hypersensitivity depending on the indications.
Influence of dentists’ age, gender, working experience, and practitioner type on the use of behaviour management techniques in dental treatment of children
Authors: Shindova Maria , Belcheva-Krivorova Ani
Published: May 2022

Abstract

Aim: The objective of the present study was to investigate the influence of dentists’ age, gender, working experience, and practitioner type on the use of non-pharmacological behaviour management techniques in the treatment of paediatric dental patients.

Materials and methods: An anonymous, self-completion survey was mailed to 200 randomly selected dentists. The recorded information included items on practitioner’s gender, age, working experience, specialty status, and frequency of using different non-pharmacological behaviour management techniques as well as the factors influencing the choice for specific behaviour guidance techniques.

Results: Significant differences between age/gender distributions were seen in the use of the basic non-pharmacological behaviour management techniques. Younger females were more likely to indicate that they were comfortable using communicative guidance techniques. The respondents in the over-40 age group did not rely at all on negative reinforcement and parental presence/absence techniques during the dental treatment of children (p<0.05). Dental practitioners with working experience of fewer than 10 years were more likely to utilize behaviour guidance techniques in attending paediatric dental patients compared to their older colleagues. No significant difference by practitioner types was seen in the use of the basic behaviour management techniques (p>0.05).

Conclusions: The present study showed age, gender, working experience, and practitioner type statistically significant differences in the use of behaviour management techniques during the dental treatment of children. The choice of a technique was influenced mainly by personal factors associated with the physical and psychological health of the child.
Why do we laugh? A semiotic analysis of British comedy duo sketches
Authors: Leonard Stephen Pax
Published: May 2022

Comedy has long been analysed from a pragmatic perspective with the predictable conclusion that we laugh because one of the four Gricean maxims has been violated. However, the wording of Grice’s maxims is so loose and flexible that more or less any joke would violate one of his maxims and thus the ‘Cooperative Principle’. So, we are still left mediating the meta-pragmatic question of what it is that lies behind verbal incongruity that makes us actually laugh? This article analyses the notion of incongruity from a Peircean semiotic perspective and focuses exclusively on a selection of British comedy duo sketches whose humour is derived overwhelmingly from discursive, lexical and socio-phonetic incongruity. On the basis of classic British comedy due sketches at least, there is some mileage in perceiving incongruity as a semiotic misalignment or ‘indexical shock’ which subverts our basic social expectations by indexing non-presupposed contexts. We laugh because our verbal norms are not only challenged, but are turned upside down and torn apart. Moreover, we laugh because the social identities that the speech acts aim to index non-referentially often clash or conflict immediately with those of his or her interlocutor’s.
Du père éducateur au pire : le cas Schreber
Authors: Marx Mélinda , Dumoulin Quentin , Gaspard Jean-Luc
Published: May 2022

La subjectivité de chaque époque se façonne au travers d’institutions devant permettre à chaque sujet de franchir les étapes-clés de son développement et de s’inscrire dans le lien social. Les auteurs reprennent le parcours singulier du Président Schreber pour interroger les incidences subjectives de l’éducation hygiéniste portée par son père, célèbre médecin de l’époque dans ses réussites mais aussi pour son ravage.
Pourquoi l’historien de l’Afrique antique doit-il s’intéresser aux études berbères ?
Authors: Desanges Jehan
Published: May 2022

En dépit de la forte punicisation de certaines régions du Maghreb (Tripolitaine et Numidie, notamment), les langues parlées au temps de la conquête arabe étaient en majorité libyques. Par la suite et jusqu’à nos jours, ce sont les parlers berbères qui ont limité l’arabophonie à travers l’histoire. Il y a une filiation entre le « libyque » et le « berbère », et l’historien de l’Afrique du Nord préislamique doit suivre de près les progrès de la recherche sur la langue berbère dont les vestiges se retrouvent jusqu’aux îles Canaries.
La langue berbère : ouvrages hagiographiques et enseignement dans le Maghreb médiéval
Authors: El Hour Rachid
Published: May 2022

Cette contribution n’a pas pour but de présenter une analyse linguistique des références en langue berbère trouvées dans les sources hagiographiques maghrébines étudiées. L’objectif principal est de mettre en évidence des matériaux textuels qui peuvent contribuer à éclaircir l’importance de ces textes pour l’étude de l’histoire de la langue berbère. Deux aspects fondamentaux sont abordés. D’une part, la présence du berbère dans les sources hagiographiques maghrébines, et d’autre part, son utilisation comme langue d’enseignement au Maghreb médiéval. Le traitement de cette langue par les dynasties berbères maghrébines constitue l’introduction à cette recherche.
Le libyque épigraphique
Authors: Ghaki Mansour
Published: May 2022

S’agissant des études relatives au Libyque, des questions sur l’origine et la datation demeurent posées ; si certains y voient une écriture autochtone propre à l’Afrique berbère, d’autres n’hésitent pas à affirmer qu’elle dérive du phénicien. La chronologie, quant à elle, varie : la fin du second millénaire av. J.C. pour certains et le règne de Massinissa, donc du second siècle toujours avant J.C. pour d’autres. Le libyque se présente, en se basant sur le support, en « libyque épigraphique » et « libyque rupestre ». Dans l’état actuel des données disponibles, en analysant les caractéristiques du libyque épigraphique : répartition géographique, décor accompagnant l’inscription, bilingues libyques-puniques et bilingues libyques-latines, nature des textes, rapports avec le milieu sédentaire et/ou citadin, etc., il est possible d’avancer, ne serait-ce qu’à titre d’hypothèses, des éléments des réponses aux questions évoquées.
L’enseignement secondaire à l’épreuve de l’Occupation allemande dans la zone interdite franc-comtoise
Authors: Cussey-Besançon Maud
Published: May 2022

En juin 1940, les troupes d’occupation allemandes s’installent sur une grande partie du territoire français dans lequel on délimite une zone au statut particulier : la zone « interdite ou réservée ». La Franche-Comté en fait presque intégralement partie. Le quotidien des populations et des établissements scolaires est rapidement bouleversé. Adultes comme élèves doivent s’accommoder de la situation et vivre au rythme du couvre-feu, des pénuries, des réquisitions, de la propagande, des censures, des arrestations… Il faut repenser le quotidien, poursuivre la mission éducative en s’adaptant sans cesse à la présence menaçante de l’occupant aux abords et au sein des établissements scolaires.
La persécution des Juifs dans la zone réservée
Authors: Rigaut Rudy
Published: May 2022

Cet article propose d’analyser la persécution des Juifs en l’insérant dans ce cadre régional particulier que représente la « zone réservée ». Dans une démarche résolument microhistorique, l’étude aborde du point de vue des bourreaux, qu’ils soient décideurs ou exécuteurs, la question du calendrier qui révèle un alignement sur celui instauré dans la zone occupée et met aussi en évidence le « paradoxe » de l’année 1944. La spécificité du sort réservé aux Juifs dans cette zone est également appréhendée à travers des lieux particuliers : les camps d’Écrouves, de Vittel et des Mazures. L’auteur traite aussi la question des tentatives de fuite vers la Suisse du point de vue des victimes, donnant ainsi à voir toutes les dimensions du processus de persécution dans cette configuration régionale spécifique.
La société inclusive : « élément de langage » ou vrai projet de lutte contre l’exclusion ?
Authors: Ennuyer Bernard
Published: May 2022

Les mots « inclusion » ou société « inclusive » sont devenus des « éléments de langage » utilisés à tout propos… Ils sont employés principalement dans un contexte de populations en difficulté ou « défavorisées », considérées comme partiellement exclues, ou potentiellement en voie de l’être, de telle ou telle institution essentielle de la société : scolarisation, formation professionnelle, logement, emploi, santé, culture, information, numérique, biens et services divers, etc. L’inclusion serait alors l’antidote à l’exclusion, la « société inclusive » le contraire d’une société qui exclut. La notion de société inclusive étant essentiellement issue du monde du handicap, nous avons examiné comment cette notion avait été reprise dans le champ des « personnes âgées ». Seule la CNSA, dans sa démarche prospective menée en 2018 a proposé des pistes permettant l’avènement d’une société inclusive affirmant : « Notre modèle de société ne se transformera que si l’ensemble des parties prenantes, au premier chef d’entre elles, les personnes concernées, s’y associent. […] Elles doivent être accompagnées afin d’être en mesure de construire des réponses aux attentes de l’ensemble des citoyens, quels que soient leur âge, leur situation de handicap ou de santé ». Cette co-construction des réponses qui leur sont proposées avec les personnes concernées nous paraît intéressante tout en veillant à ce que, pour ces personnes, cette participation reste un choix et ne devienne pas une obligation.
Le recours aux normes comme outil de résolution du conflit : conséquences et illusions
Authors: Hatchuel Françoise
Published: May 2022

Cet article s’efforce de questionner la place croissante des normes dans l’enseignement supérieur, d’en décrire quelques paradoxes et conséquences, tout en faisant quelques hypothèses sur le maintien d’un imaginaire pourtant abondamment décrié. Une attention particulière est portée à deux domaines : l’utilisation des outils informatiques et la conception de la rigueur scientifique.
Perte et reconquête de la place de la psychosociologie en milieu universitaire
Authors: Hans Danielle
Published: May 2022

L’article présente le récit autobiographique d’une situation vécue au cours d’une expérience d’enseignant-chercheur dans une université française. La violence vécue subjectivement par son auteur fait l’objet d’analyses montrant la complexité des dimensions impliquées dans la situation. Ces analyses abordent les implications affectives et les positions professionnelles de l’auteur, examinent plusieurs processus liés au contexte institutionnel et questionnent les rapports de pouvoir au sein des relations entre enseignants-chercheurs. L’article débouche sur une compréhension plus générale des processus de liaison et de déliaison dans l’institution universitaire.
La physique sous haute tension ? La réception passionnée de Lost in Maths
Authors: Metzger-Debrune Pierre-Emmanuel
Published: May 2022

Dans cette contribution, l’auteur propose une analyse sociologique de la réception d’un ouvrage de vulgarisation, Lost in Maths . Sept entretiens réalisés avec des chercheurs et des étudiants en physique sont étudiés. Ils donnent à voir une réception passionnée, parfois violente, de l’ouvrage. Afin d’approuver ou de critiquer les conclusions de celui-ci, les enquêtés ont fait part de leur attachement à une certaine conception de la physique et ont raconté l’origine de leur goût pour cette discipline. Lost in Maths a parfois été perçu comme une agression et son évocation a elle-même donné lieu à des postures agressives. Cette réception est rapportée aux tensions scientifiques, vocationnelles et professionnelles, auxquelles doivent faire face les enquêtés.
Racisme : entre exclusion sociale et peur identitaire
Authors: Leroy Aurélie
Published: May 2022

Résistant et élastique, le racisme mue au gré des évolutions des sociétés contemporaines. La reconfiguration des liens sociaux vers plus d’hétérogénéité questionne le rapport aux « autres » et la frontière entre « eux » et « nous ». Le réveil des affirmations identitaires se révèle, selon l’usage, instrument d’intégration ou d’exclusion. Au-delà d’un simple discours écran, la promotion de la diversité articulée à la quête d’égalité peut être motrice d’émancipation.
Attractors for the Navier-Stokes-Cahn-Hilliard system
Authors: Giorgini Andrea , Temam Roger
Published: May 2022

We investigate the longtime behavior of the solutions to the Navier-Stokes-Cahn-Hilliard system (also known as Model H) with singular (e.g. Flory-Huggins) potential and non-constant viscosity. We prove that the initial and boundary value problem generates a strongly continuous semigroup on a suitable phase-space. Next, we establish the existence of the global attractor and of exponential attractors, and their regularity properties.
Existence of solutions to elliptic equation with mixed local and nonlocal operators
Authors: Li Xiangrui , Huang Shuibo , Wu Meirong , Huang Canyun
Published: May 2022

In this paper, making use of a new non-smooth variational approach established by Moameni[13,14,15,16], we establish the existence of solutions to the following mixed local and nonlocal elliptic problem

   \begin{document}$ \begin{equation*} \begin{cases} -\Delta u+(-\Delta)^s u = \mu g(x,u)+b(x), &x\in\Omega,\\ \; \; \; \; \; \; \; \; \; \; \; \; \; \; \; \; \; \; \; \; \; u\geq0,\; \; \; \; \; &x\in\Omega,\\ \; \; \; \; \; \; \; \; \; \; \; \; \; \; \; \; \; \; \; \; \; u = 0,\; \; \; \; \; &x\in\mathbb{R}^{N}\setminus\Omega, \end{cases} \end{equation*} $\end{document}

where $ \Omega \subset \mathbb{R}^{N} $ is a bounded smooth domain, $ (-\Delta)^{s} $ is the restricted fractional Laplacian, $ \mu > 0 $, $ 0 < s < 1 $, $ N > 2s $, $ g $ satisfies some growth condition and $ b(x)\in L^m(\Omega) $ for $ m\geq 2 $. The interesting feature of our work is that we show that the nonlocal operator has an important influence in the existence of solutions to the above equation since $ g $ has new growth condition.
Catastrophe control of aphid populations model
Authors: Zhao Lichun , Liu Jingna , Liu Bing , Li Yuan , Zhao Huiyan
Published: May 2022

Considering the effect of the natural enemy on aphid populations, the corresponding model with delay is built. The model is analyzed using the qualitative theory of differential equations and catastrophe theory etc. For the outbreak phenomenon of aphid populations, the corresponding management model is proposed and the catastrophe controller is designed to keep the system in a virtuous cycle by means of the qualitative theory of impulsive differential equations. In the mean time, some simulations are carried to prove the results. The paper not only provides a new method for catastrophe control but also expands the application fields of catastrophe control.
Hybrid Approach for Wind Turbines Power Curve Modeling Founded on Multi-Agent System and Two Machine Learning Algorithms, K-Means Method and the K-Nearest Neighbors, in the Retrieve Phase of the Dynamic Case Based Reasoning
Authors: Kouissi Mohamed , En-Naimi El Mokhtar , Zouhair Abdelhamid
Published: May 2022

Wind turbine power curve (WTPC) plays an important role for energy assessment, power forecasting and condition monitoring. The WTPC captures the nonlinear relationship between wind speed and output power. Many modeling approaches have been proposed by researches to improve the WTPC model performance. In this paper, we present a hybrid approach of wind turbines power curve modeling based on Case Based Reasoning approach, multi agent system, the K-Means unsupervised machine learning method, and then the supervised machine learning algorithm, which is the K-Nearest Neighbors KNN method. The both of the Machine Learning algorithms, K-means and KNN, are used in the retrieve step of the Dynamic Case Based Reasoning (DCBR) cycle to facilitate the search of wind turbines with similar characteristics to our target case. These wind turbines are first grouped into homogeneous classes and then sorted on the basis of a feature similarity measure using the K-Nearest Neighbors supervised machine learning method. Finally, a set of WTPC with similar characteristics of the target case are proposed.
Predictors of cardiac dysfunction in children with HIV/AIDS attending University of Nigeria Teaching Hospital Enugu
Authors: Arodiwe Ijeoma O. , Eke Christopher B. , Arodiwe Ejikeme B.
Published: May 2022

Cardiac dysfunction, though common as a primary effect of HIV infection or its treatment in HIV-infected children, is often clinically masked by pulmonary disease in patients with HIV infection and AIDS. The objective of the study was to determine the prevalence and predictors of cardiac dysfunction in children with HIV/AIDS infection. This was a cross-sectional comparative case - control study of clinical and echocardiographic findings in 90 pediatric HIV/AIDS children aged 18 months to 14years and their age and gender - matched HIV – negative controls attending the University of Nigeria Teaching Hospital, Enugu. Relevant clinical information including demographics, investigations including echocardiography and treatment, were captured using a datasheet designed for the study. Data analysis was done using SPSS version 20.0. A p value of <0.05 was considered significant. The majority of the subjects had cardiac abnormalities and was on HAART. The pattern of cardiac abnormalities in HIV – infected and AIDS groups were left ventricular diastolic dysfunction (33.8% and 36.4% in the HIV – infected and the AIDS groups respectively, followed by dilated cardiomyopathy (6.8%) seen only in AIDS group (p=0.03). A strong linear relationship between cardiac dysfunction and CD4+ counts (R2=0.8642) and age (R2=0.4203) among the patients were observed. Cardiac dysfunction is common in children with HIV/AIDS and predicted by CD4+ count and increasing age. Need exists to monitor the development of cardiac dysfunction using appropriate clinical details and echocardiography is recommended to improve their quality of life.
Comparative study between BAP65 score and DECAF score in assessment of acute exacerbation of chronic obstructive pulmonary disease
Authors: Lolah Magdy A. , El-Habashy Mahmoud M. , Gadallah Mahmoud T.
Published: May 2022

Background

Chronic obstructive pulmonary disease (COPD) exacerbations is common, but accurate expectation of hospitalized patients in exacerbation state has been difficult for a long time. Dyspnea, eosinopenia, consolidation, acidemia, and atrial fibrillation (DECAF) score was evaluated in this study for prediction of mortality and ventilation need in patients with acute exacerbation of COPD admitted to ICU or chest department. This novel score was compared with the BAP65 scoring system.

Patients and methods

A total of 50 patients were included in this comparative study. They were admitted with COPD exacerbation from our ER to the chest department or ICU. BAP65 and DECAF scores were collected on admission for each patient. The patients were followed up during the hospital stay. Death or ventilation events was recorded. Data analysis was done using SPSS, version 22.

Results

DECAF and BAP65 scores had a good prediction of in-hospital mortality, with 100% sensitivity for both, whereas the specificity was 87% for DECAF score and 91% BAP65 score. The accuracy in mortality prediction for DECAF and BAP65 score was 88 and 92%, respectively. The sensitivity of DECAF and BAP65 scores for prediction of mechanical ventilation need was 93 and 87%, respectively, whereas the specificity was 74 and 60%, respectively, with 80% accuracy in DECAF score and 68% accuracy in BAP65 score. A positive linear relationship with a significant correlation was found between DECAF score and BAP65 score on the Pearson’s graph (r=0.604, P<0.001).

Conclusion

BAP65 and DECAF are feasible scores that can be calculated by usually available data. They also have a good prediction for mortality and ventilation need during acute exacerbation of COPD.
Role of chest ultrasound in early diagnosis of ventilator-acquired pneumonia and its impact on the outcome
Authors: Mohamed Alaa E.A. , Abdel Dayem Aya M. , Elmaraghy Ashraf A. , Ezzelregal Hieba G.
Published: May 2022

Background

The term ventilator-acquired pneumonia (VAP) refers to pneumonia that develops 48–72 h after endotracheal intubation. The accuracy of diagnosis is improved by combining clinical, laboratory, and radiographic criteria.

Purpose

This article offers an evidence for the role of chest ultrasound in early detection of VAP and its effect on the outcome in the respiratory ICU.

Patients and methods

A prospective study carried out on 100 consecutive patients, who were mechanically ventilated and developed VAP admitted to the respiratory ICUs of Ain Shams University Hospitals in the period from February 2019 to February 2020. All were subjected to chest radiograph and chest ultrasonography screening within 12 h of mechanical ventilation and followed up after obtaining informed written consent of one first-degree relative of the patients.

Results

For diagnosis of VAP requires a highly statistically significant increase in the detection of chest ultrasound findings (B lines, air bronchogram, and pleural effusion) serially in the first 72 h of patient hospitalization (P=0.001 for all). This was correlated with the outcome, there was a high statistically significant increase in air bronchogram and pleural effusion in mortality patients in the first 48 h by serial chest ultrasound (P=0.003, 0.002, respectively). After 72 h pleural effusion only was the finding that showed a highly statistically significant increase with mortality (P=0.001), with a sensitivity of 38.9% and specificity of 89%, and it was found to be the most important predictor of mortality by chest ultrasound after 72 h.

Conclusion

Chest ultrasound is a sensitive method for bedside detection of VAP. Sonographic findings of VAP was found to have a big impact on the outcome. The most important predictor of death in VAP assessment by chest ultrasound was pleural effusion in the first 72 h.
Castleman’s disease associated with bronchopulmonary cancer
Authors: Achrane Jihane , Baina Sofia , Benamor Jouda , Bourkadi Jamal E.
Published: May 2022

Castleman’s disease is a rare lymphoproliferative disease of unknown etiology. It presents itself under different clinical pathological entities, with mainly two distinct histological types, the hyaline-vascular type and the plasmocytic type, and two distinct clinical forms, the localized unicentric form, which generally has a favorable prognosis, and the diffuse multiricentric form, with prognosis often pejorative, justified by the emergence of certain malignant tumors during its evolution. The association with bronchopulmonary cancer has rarely been reported in the literature, and explanations other than coincidence remain very probable. The authors report two rare cases of multicentric Castleman’s disease associated with bronchopulmonary cancer.
Do Not Miss the Forest for the Trees – Clinicoradiological Quiz
Authors: Gupta Nitesh , Mahendran Arul J. , Gupta Neeraj Kumar , Ish Pranav
Published: May 2022

Abstract-Right hypochondrium pain with air-fluid level in chest X-ray can have a long list of differential diagnosis. A meticulous evaluation of history with appropriate investigations can help make the correct diagnosis.
Platelet mass index as early indicator of subclinical atherosclerosis in psoriasis
Authors: Gaballah Mohammad A. , Eldegla Sara I.E. , Taman Saher E.M. , Salem Hanan A.M.
Published: May 2022

Background

Psoriasis is a chronic systemic disease. Inflammatory pathways activation in psoriasis may play a role in atherosclerosis development, independent of conventional risk factors. Platelets may have roles in psoriasis and atherosclerosis. Cardiovascular diseases prevention is based on early diagnosis of atherosclerosis. Platelet mass index means platelet count×mean platelet volume. Platelet mass index is a good indicator of inflammation, platelets activation, and atherosclerosis.

Objective

To evaluate platelet mass index as a marker of early diagnosis of subclinical atherosclerosis in psoriasis and its relation to different disease characteristics.

Patients and methods

In this case-control study, 100 psoriasis patients and 100 well-matched healthy controls were included. In all participants, common carotid intima-media thickness, platelet count, mean platelet volume, platelet mass index, and Psoriasis Area Severity Index (PASI) score were estimated.

Results

There were significant increases in platelet mass index and common carotid intimamedia thickness in patients compared with controls and in atherosclerotic patients compared with nonatherosclerotics. There was significant increase in psoriasis duration in atherosclerotic patients compared with nonatherosclerotics, whereas PASI score showed nonsignificant difference between them. There were significant positive correlations between platelet mass index and patient age, psoriasis duration, common carotid intima-media thickness, whereas there was significant inverse correlation between platelet mass index and age of psoriasis onset and no correlation with PASI score. Platelet mass index was more predictor of atherosclerosis than platelet count and mean platelet volume. Platelet mass index was valid as predictor for atherosclerosis with cutoff value 3322.

Conclusion

Platelet mass index may be a good marker of platelet activity and subclinical atherosclerosis in psoriasis. Disease duration is more important than severity in atherosclerosis development. Dermatologists should advice patients to avoid traditional cardiovascular risk factors and to do routine cardiovascular checkup.
Ciliated foregut cyst of the gall bladder in the Calot’s triangle: A case report with review of literature
Authors: Baig Sarfaraz Jalil , Priya Pallawi
Published: May 2022

Ciliated foregut cysts (CFCs) are rare anomalies of the foregut epithelium. The common sites in the abdomen are liver and gall bladder. There are only 16 cases of CFC reported in the gall bladder to date. A 20-year-old girl presented with pain in the right upper abdomen. There was a radiological evidence of cystic lesion in the region of Calot’s triangle. A differential diagnosis of either type 2 choledochal cyst or CFC was made. Intraoperative and histopathological findings were suggestive of CFC. CFC should be kept in mind as a rare differential diagnosis when evaluating cysts in the gall bladder fossa.
Between Object and Subject
Authors: Opriș Vasile , Manea Bogdan , Lechintan Mircea , Bugoi Roxana , Constantin Florin , Ignat Theodor , Lazar Catalin
Published: May 2022

The current paper aims to reveal the potential of combining multiple approaches (techno-functional analysis, experimental archaeology, and X-ray Computed Tomography) when it comes to studying unique earthenware artefacts, such as the prehistoric human-shaped pot discovered within the tell settlement from Sultana-Malu Rosu (Romania), that belongs to the Kodjadermen-Gumelnita-Karanovo VI civilization (KGK VI) which thrived during the 5th millennium BC. This human-shaped pot, also known as ‘The Goddess of Sultana’, is an emblematic artefact that fascinates with its shape, gestures, and decoration. It was apparently made from a standard clay paste recipe and using basic forming techniques, with little care for the internal surface. This vessel also has several hidden cracks and some manipulation traces on its backside. In order to explore its relevance, our approach to this particular human-shaped pot included the use of archaeological data in correlation with other techniques in order to decipher the manufacturing process for such vessels, the possible way of using them, but also the meanings that they might have had for past human communities.
Willingness To Use Ice-Fish Box by Fresh Fish Value-Chain Actors in Lagos State, Nigeria
Authors: Ajayi A.T.O. , Benson O.B. , Johnson O.M. , Agboola A.A.
Published: May 2022

A fish preservation technology was developed in the year 2016 by Nigerian Stored Products Research Institute, (NSPRI) in a well-insulated container known as “NSPRI Ice-Fish Box” (NSPRI-IFB). The technology was disseminated to fresh fish value-chain actors (farmers, marketers, processors and transporters) in selected coastal local government areas of Lagos State namely Lagos Mainland, Epe, Badagry and Ikorodu which housed Asejere, Epe, Badagry and Ijede fish markets respectively in 2019. The study was conducted in these markets to ascertain the awareness status and determine the willingness of these actors to use NSPRI-IFB. Data were randomly collected from 110 respondents selected through a simple random sampling procedure using questionnaire and analysed using descriptive statistics and Chi-square statistical tool. Excellent numbers of actors (81.82%) are well aware of NSPRI-IFB while 27.27% of them declare they are not aware. Results further shows that actors are very willing to use NSPRI-IFB for fresh fish preservation (x̅ = 3.87) and transportation (x̅ = 3.81). However, they are not at all willing to use the technology for fish processing ( x̅= 1.67) and curing ( x̅= 1.73). Chi-square analysis reveals significant associations (p≤0.05) between willingness to use NSPRI-IFB and actors’ age and level of education. Conclusively, value-chain actors are well aware and are willing to use the technology. Fresh fish postharvest loss reduction policy should be directed towards mass adoption of NSPRI-IFB.