bluuebunny/crossref_metadata_2025 huggingface dataset:
A new Andean genus, Lafontaineana, with descriptions of four new species and two new Neotropical species of Panthea (Noctuidae, Pantheinae)
Authors: Martinez Jose I. , Schmidt B. Christian , Miller Jacqueline Y.
Published: April 2021

LafontaineanaMartinez,gen. nov.is proposed as a new Neotropical genus of Pantheinae, forming a sister group toGaujoniaDognin, 1891 based on a phylogenetic analysis. In addition, one new combination and four new species are proposed:Lafontaineana marmorifera(Walker, 1865),comb. nov.(Colombia),Lafontaineana alexandraeMartinez,sp. nov.(Ecuador),Lafontaineana imamaMartinez,sp. nov.(Colombia),Lafontaineana pumaMartinez,sp. nov.(Ecuador), andLafontaineana thutaMartinez,sp. nov.(Ecuador). Two new Neotropical species ofPantheaare described,Panthea hondurensisMartinez,sp. nov.andPanthea tainaMartinez,sp. nov.
The genus Syntozyga Lower (Lepidoptera, Tortricidae) in China, with descriptions of two new species
Authors: Yang Wenxu , Dong Ruiqin , Song Xueling , Yu Haili
Published: April 2021

Species of the genus Syntozyga Lower, 1901 (Lepidoptera, Tortricidae, Olethreutinae) from China are studied. Syntozyga apicispinatasp. nov. and S. similispirographasp. nov. are described, S. pedias (Meyrick, 1920) is recorded for the first time from China, and S. spirographa (Diakonoff, 1968) is newly recorded from the Chinese mainland. Adults and genitalia are illustrated, and a distribution map of the Chinese species is given. Keys to identify the Chinese species of Syntozyga are provided. Species of the genus are well clustered in a neighbor-joining tree based on the sequence data of the COI gene. COI sequences corresponding to the new species and S. spirographa (Diakonoff, 1968) are submitted to BOLD.
Des mobilités discrètes en milieu populaire
Authors: Misset Séverine , Noûs Camille
Published: April 2021

Cet article analyse des déplacements professionnels « discrets » au sein de fractions stabilisées des classes populaires, à partir d’un dispositif d’enquête original et collectif, constitué de monographies de ménages. L’approche proposée met en évidence une logique de « maisonnée » éclairant ces mobilités professionnelles. La prise en compte de l’articulation entre quatre dimensions – patrimoniale, résidentielle, éducative, professionnelle – potentiellement constitutives de formes de respectabilité populaire, s’avère ainsi heuristique pour analyser les effets contrastés de cette logique de « maisonnée ».
Du divan à la lutte
Authors: Smaoui Sélim
Published: April 2021

Bien que centrale dans tout vécu militant, la « réalisation de soi » ne se laisse pas saisir aisément. En démontrant comment la lutte collective actualise des formes de rapport à soi qui ont été éprouvées au long cours par les individus, cet article donne une consistance sociologique à cette expérience individuelle. Centré sur l’exemple d’une femme engagée pour élucider la « vérité » sur un crime d’État, il montre comment ce combat politique a reconfiguré un travail sur soi débuté au cours d’une cure psychanalytique, et indique combien la remise de soi à une cause est inextricablement liée au sentiment de se réaliser à travers celle-ci.
Au-delà de la nomenclature des PCS
Authors: Bernard Lise
Published: April 2021

L’article montre comment étudier statistiquement des milieux professionnels non repérables dans la nomenclature des Professions et Catégories Socioprofessionnelles (PCS). Il s’agit d’identifier leurs membres à partir des libellés de profession, qui constituent la matière première du classement dans la nomenclature. À partir du cas des agents immobiliers, l’article montre l’utilité de cette opération et explique comment la mettre en œuvre. Il met ensuite en évidence qu’elle peut permettre de repérer finement une position sociale et d’articuler étroitement des données de la statistique publique avec une enquête de terrain.
Regard sur une démarche évaluative « partenariale » municipale : recompositions et résistances des professionnels dans l’école
Authors: Flamant Anouk
Published: April 2021

Cet article s’intéresse à une démarche évaluative entreprise par l’observatoire POLOC de deux projets éducatifs de territoire (PEDT) dans deux grandes villes. L’enquête interroge la manière dont les acteurs de terrain, en particulier les équipes d’enseignants et d’animateurs, répondent aux demandes de développement et de renforcement des partenariats pour favoriser la réussite éducative des enfants. Notre article analyse tout d’abord comment les équipes vont résister initialement à de nouvelles missions, en particulier la manière dont les différents directeurs d’école et d’animation s’emparent du « sale boulot » pour protéger leurs équipes. Ensuite, notre travail démontre que cette démarche évaluative est mobilisée certes pour limiter le partenariat entre les deux professions, mais aussi pour affirmer leur légitimité dans l’école et porter certaines de leurs revendications professionnelles à leur hiérarchie. Cette démarche partenariale permet enfin d’affirmer le registre scolaire comme le registre dominant des échanges entre les acteurs.
Rencontre entre chercheures et professionnels d’un Programme de Réussite Éducative : le partage d’une altérité professionnelle, un engagement dans la confiance
Authors: Delalande Julie , Dupont Nathalie
Published: April 2021

Nous sommes deux chercheures du CIRNEF (Centre Interdisciplinaire de Recherches Normand en Éducation et Formation) de l’Université de Caen Normandie qui avons travaillé pendant cinq ans avec des professionnels d’un Programme de Réussite Éducative. À partir d’un ensemble d’actions partagées, initiées par une demande de formation, nous avons tissé des relations qui nous ont amenées à partager notre altérité professionnelle et à rapprocher nos deux mondes professionnels. C’est le récit de cette implication que nous proposons, qui par son analyse vise à contribuer aux réflexions qui animent les chercheurs sur leurs relations avec les personnes qu’ils côtoient, dans le cadre d’une recherche ou d’une formation. Ni recherche, ni formation, ni recherche-action, l’investissement décrit ici défend le statut de chercheurs de proximité qui s’inscrivent dans la tradition anthropologique de la rencontre et aussi dans une forme hybride entre intervention, accompagnement, partenariat et recherche.
Propositions de réforme des retraites publiques en Belgique
Authors: Devolder Pierre
Published: April 2021

La Belgique dispose pour l’instant d’un régime de retraite de sécurité sociale en répartition et en prestations définies. Comme dans de nombreux autres pays, la soutenabilité financière de cette architecture est menacée et le système contient de nombreuses injustices et incohérences. Une commission de réforme a été mandatée en 2013 en vue de proposer une réforme structurelle. La pension à points, telle que développée dans le rapport de 2014, constitue un projet cohérent permettant d’améliorer la soutenabilité financière, l’équité, la flexibilité et la transparence des régimes belges de pension légale. Néanmoins, le concept de point n’a pas convaincu et a suscité de nombreuses craintes. L’objectif de cet article est de mettre en contexte et synthétiser le projet belge de pension à points. Face au rejet du concept même de point, nous proposerons également une alternative à la pension à points, le compte individuel pension, visant à rencontrer les grands objectifs de cette réforme mais tout en évitant le recours à la notion même de points. Une comparaison sera également faite avec le mécanisme des comptes notionnels.
Extended Krylov subspace methods for solving Sylvester and Stein tensor equations
Authors: Bentbib Abdeslem Hafid , El-Halouy Smahane , Sadek El Mostafa
Published: April 2021

This paper deals with Sylvester and Stein tensor equations with low rank right hand sides. It proposes extended Krylov-like methods for solving Sylvester and Stein tensor equations. The expressions of residual norms are presented. To show the performance of the proposed approaches, some numerical experiments are given.
Linear-quadratic mean-field type stackelberg differential games for stochastic jump-diffusion systems
Authors: Moon Jun
Published: April 2021

In this paper, we consider linear-quadratic (LQ) leader-follower Stackelberg differential games for mean-field type stochastic systems with jump diffusions, where the system includes mean-field variables, i.e., the expected value of state and control variables. We first solve the LQ mean-field type control problem of the follower using the stochastic maximum principle and obtain the state-feedback representation of the open-loop optimal solution in terms of the coupled integro-Riccati differential equations (CIRDEs) via the Four-Step Scheme. Next, we solve the problem of the leader, which is the LQ control problem subject to the mean-field type forward-backward stochastic system with jump diffusions, where the constraint characterizes the rational behavior of the follower. Using the variational approach, we obtain the (mean-field type) stochastic maximum principle. However, to obtain the state-feedback representation of the open-loop optimal solution of the leader, there is a technical challenge due to the jump process. We consider two different cases, in which the state-feedback type control in terms of the CIRDEs can be characterized by generalizing the Four-Step Scheme. We finally show that the state-feedback type controls of the open-loop optimal solutions for the leader and the follower constitute the Stackelberg equilibrium.
Feedback stabilization of parabolic systems with input delay
Authors: Djebour Imene Aicha , Takahashi Takéo , Valein Julie
Published: April 2021

This work is devoted to the stabilization of parabolic systems with a finite-dimensional control subjected to a constant delay. Our main result shows that the Fattorini-Hautus criterion yields the existence of such a feedback control, as in the case of stabilization without delay. The proof consists in splitting the system into a finite dimensional unstable part and a stable infinite-dimensional part and to apply the Artstein transformation on the finite-dimensional system to remove the delay in the control. Using our abstract result, we can prove new results for the stabilization of parabolic systems with constant delay: the \begin{document}$ N $\end{document}-dimensional linear reaction-convection-diffusion equation with \begin{document}$ N\geq 1 $\end{document} and the Oseen system. We end the article by showing that this theory can be used to stabilize nonlinear parabolic systems with input delay by proving the local feedback distributed stabilization of the Navier-Stokes system around a stationary state.
Building Face Detection with Face Divine Proportions
Authors: Oualla Mohamed , Ounachad Khalid , Sadiq Abdelalim
Published: April 2021

In this paper, we proposed an algorithm for detecting multiple human faces in an image based on haar-like features to represent the invariant characteristics of a face. The choice of relevant and more representative features is based on the divine proportions of a face. This technique, widely used in the world of beauty, especially in aesthetic medicine, allows the face to be divided into a set of specific regions according to known mathematical measures. Then we used the Adaboost algorithm for the learning phase. All of our work is based on the Viola and Jones algorithm, in particular their innovative technique called Integral Image, which calculates the value of a Haar-Like feature extracted from a face image. In the rest of this article, we will show that our approach is promising and can achieve high detection rates of up to 99%.
Burnout Syndrome Prevention Measures among Nursing Staff: Implementing a Mobile Application based on MIT's App Inventor Tool using the Scratch Programming Code
Authors: Lafraxo Mohammed Amine , Ouadoud Mohammed , El Madhi Youssef , Rehali Mourad , Soulaymani Abdelmajid
Published: April 2021

This research study serves, on the one hand, to assess the prevalence of burnout among the nursing staff. On the other hand, to determine the socio-demographic and professional characteristics associated with burnout. The aim is to propose an interactive tool to cope with burnout. This is an observational study of a cross-sectional type, conducted among a population of 30 nurses over 4 months. A two sections self-administered survey was used to determine: 1) Sociodemographic and professional characteristics; 2) the Copenhagen Burnout Inventory to evaluate burnout. In total, 17% of nurses display a high level of burnout in both its dimensions and that more than 50% are highly susceptible to it. Moreover, 83% of participants agreed to use the technology as a solution. The proposed prevention solution to cope with burnout was developed by the scratch programming code using the app inventor tool, it consists of three online services (Training, Assessment, Support).
Burnout Syndrome Among Nursing Staff: Performing Data Analysis using the SPSS Statistic
Authors: Lafraxo Mohammed Amine , Ouadoud Mohammed , El Madhi Youssef , Soulaymani Abdelmajid
Published: April 2021

This study aimed to evaluate the prevalence of burnout among nurses, to determine the socio-demographic characteristics associated with burnout, and to assess the influence of the practice of physical activities on burnout. This is an observational study of a cross-sectional type. A self-administered survey was used to determine the socio-demographic and professional characteristics. The Copenhagen Burnout Inventory to evaluate burnout and the Ricci-Gagnon questionnaire to assess the level of physical activity and sports practice. In total, 16.7% of the participating nurses displayed a high level of general burnout (63.3% medium, 20% low), and 23% displayed a high level of patient-related burnout (34% medium, 43% low). Physical activity had no protective effect against burnout, as 87% of participants were physically active. This research result confirmed what exists in other scientific publications; the prevalence of burnout is a reality in the health professions. It is necessary to think of setting up accompaniments to sensitize nurses for primary prevention against burnout.
Diuretic Effect on Combination of Celery Herb (Apium graveolens L.) and Bay Leaf (Syzygium polyanthum W.) Ethanol Extract towards Wistar Male Mice (Rattus norvegicus L.)
Authors: Widiyastuti Lina , Putranti Widyasari , Bachri Moch. Saiful , Aslama Wilda Nur Hijriati
Published: April 2021

Celery (Apium graveolensL.) and Bay (Syzygium polyanthumWight) contain active compound of flavonoid which can obstruct reabsorbsion of Na and water until increase diuretic effect. This research aims to know diuretic effect combinations from celery herb and bay leaf ethanol extract 70% toward Wistar Male Mice using Lipschitz test. The research design is experimental withposttest only control group designby deviding the mice into normal group, hydrochlorothiazide group 25 mg/kg, control CMC-Na 0.5%, and combinations of celery herb (CHEE) and bay leaf ethanol extract(BLEE) treatment group. Those were made in 3 variances combinations doses which are; 1.125 mg/kg:6.25 mg/kg (combination-1), 2.25 mg/kg:12.5 mg/kg (combination-2), and 4.5 mg/kg:25 mg/kg (combination-3) and also 2 single doses of CHEE 4.5 mg/kg and BLEE 25 mg/kg. Diuretic effect is determined by a diuretic index and Lipschitz value. Urine volume is analyzed with ANOVA and continued analyzing with non parametric Kruskal-Wallis and Mann Whitney. The results of diuretic effect combinations from CHEE and BLEE showed that the three combinations have diuretic effect with value index in series from the smallest dose combinations are; 1.83, 1.86, 2.09 at 5 hours and 1.73, 1.75, 2.02 at 24 hours. Lipschitz values are 0.78, 0.79, 0.89 at 5 hours observation and 0.79, 0.79, 0.913 at 24 hours. Diuretic energy are ; 69.84%, 72.48%, 94.12% at 5 hours and 65.79%, 67.79%, 93.15% at 24 hours. Based on the test results of diuretic effects, combinations of CHEE and BLEE have diuretic effect and combination-3 which is the closest to hydrochlorothiazide.
Effects of Kepok Banana Flour on Glucose Level and Physical Performance in Type 2 Diabetic Rats
Authors: Nur Afifa Muizza , Wasita Brian , Nuhriawangsa Adi Magna Patriadi
Published: April 2021

Diabetes mellitus prevalence has rapidly increased globally. Food contains high resistant starch (RS) may be used as a functional food to prevent and control diabetes mellitus. Resistant starch is high in raw bananas and its products such as flour. The study aimed to evaluate effects of Kepok banana flour on blood glucose and physical performance, especially body weight and feed intake in type 2 diabetic rats induced by nicotinamide (NA) and streptozotocin (STZ). Eight-week-old male Wistar rats weighed 150-200 g were randomly divided into nondiabetic and diabetic groups. Nondiabetic group (n=7 rats) was normal control (NC) and fed with standard diet AIN-93M (American Institute of Nutrition Rodent Diets 1993 for adult maintenance), while diabetic groups (n=7 rats each group) consisted of diabetic control (DC) which fed with standard diet and 3 diabetic treatment groups (T1-T3) which fed with AIN-93M containing kepok banana flour with 4%, 8% and 12% of RS respectively for 14 days. After 14 days, mean fasting blood glucose in group T1, T2 and T3 have lower blood glucose than DC significantly (p<0.05) with the highest decrease of blood glucose was on group T3. Mean of body weight in group T1, T2, T3, and NC gained significantly compared to DC group (p<0.05). Feed intake in group T1, T2, T3, and NC were less than DC significantly (p<0.05). Administration of kepok banana flour with 4%, 8% and 12% of RS is able to decrease glucose level, to restore body weight loss and to reduce feed intake in STZ-NA induced type 2 diabetic rats. Kepok banana flour can be proposed as an alternative diet in the management of type 2 diabetes.
Test Activity Combinations of Celery Herb (Apium graveolens L.) and Bay Leaf (Syzygium polyanthum W.) Ethanol Extract Toward DecreasedLipid Profile Levels in Hypertensive Mice
Authors: Putranti Widyasari , Widiyastuti Lina , Bachri Moch. Saiful , Defianti
Published: April 2021

Celery herb contains flavonoid which can hamper cholesterol synthesis through inhibitor HMG-CoA reductase. Bay leaf has a working mechanism that stimulates bile fluid secretion and stimulates blood circulation. This research aims to know the activity combinations of bay leaf ethanol extract (BLEE) and celery herb ethanol extract (CHEE) and to know which dose mostly can decrease lipid profile levels. The design of this research uses experimental withpre-post control group design.The mice are rendered with NaCl 8% solution and High Fat Feed. The mice are divided into 9 groups, in each group there are 5 mice which are normal group, control group, HCT group, Simvastatin group, and CHEE 4.50 mg/kgBW, BLEE 25.00 mg/kgBW, combination 1, combination 2, and combination 3. Data analysis is conducted with Normality test,One Way ANOVAtest,Kruskal-Wallis,Mann-Whitney. Based on the research after they are induced with NaCl 8% solvent and given high-fat feed, the extract can increase total cholesterol levels, triglycerides, LDL, and also significantly decrease HDL (p <0.05). After giving a test extract solution, it can reduce total cholesterol, triglycerides, LDL, and also significantly increase HDL levels (p <0.05). The conclusion, the three variations combinations dose can decrease total cholesterol, Triglycerides, LDL, and also increase HDL levels, and combination dose 3 has the greatest decrease in total cholesterol, triglyceride, LDL, and the highest increase in HDL levels. So the lower the total cholesterol level, the lower the possibility of hypertension.
Simple Method for Detection of Potassium Iodate (KIO3) in a Kitchen Salt Using cassava starch (Manihot esculenta)
Authors: Riyanto  , Saputri Niar Dwi
Published: April 2021

This research has been made a simple method for the detection of potassium iodate (KIO3) in a kitchen salt using cassava starch (Manihot esculenta). The process of making this test kits using acid solvent as the reagent, KIO3 solution, and indicator of cassava starch. The used cassava starch is in two conditions are dry starch for H2SO4 and wet starch for H3PO4. Based on the two solvents are then made a standard color series based on KIO3 levels of 10, 20, 30, 40, and 50 ppm. Validation of this method has analyzed using Spectrophotometer UV-Vis. From the results of this analysis obtained calibration curve of each standard with both solvent. Coefficients determination for linearity using H3PO4 and H2SO4 solution is 0.9874 and 0.9656. From that results from the H3PO4 solution applied to the detection of potassium iodate (KIO3) in a kitchen salt using cassava starch (Manihot esculenta) with a concentration in the range 30-40 ppm.
Activated Carbon Based on Pineapple Crown for Heavy Metal Adsorption
Authors: Awitdrus Awitdrus , Putri Meylia Susiana Dewi , Syahputra Romi Fadli , Iwantono Iwantono , Saktioto Saktioto
Published: April 2021

The objectives of this study are to investigate the influence of concentration variation of potassium hydroxide (KOH) and to remove a heavy metal in liquid waste of the activated carbon. The raw material of activated carbon was obtained from pineapple crown waste. Pineapple crowns pre-carbonized at 180 oC for 1 hour. Chemical activation was carried out using KOH with concentration 2M, 3M, and 4M for 20 hours at 30 oC and temperature 60 oC for 2 hours. Microwave irradiation was conducted at 630 Watt of output power for 15 minutes. The physical properties of activated carbon were characterized using scanning electron microscopy to determine surface morphology of activated carbon, X-ray diffraction to calculated microstructure (i.e. interlayer spacing and microcrystalline dimension) using Bragg’s and Scherer’s equations, specific surface area was calculated from N2 adsorption-desorption isotherm using BET equation, Fourier-transform infrared (FTIR) identify the functional groups of activated carbon, and heavy metals absorption was tested using atomic adsorption spectrophotometric. The highest surface area of activated carbon is 300,901 m2/g for activated carbon with concentration 2M corresponding to the highest stack height (Lc) of activated carbon of 10,470 nm. The carbon chain structure shows the functional groups C-H, C≡C, O-H, C-OH, and CH2 at wavenumbers of 2889,49 cm-1, 2360,97 cm-1, 2339,97 cm-1, and 998,21 cm-1, respectively.
Bentonite-Biochar Combination for Manganese Ion Removal from Water
Authors: Yasdi Yasdi , Rinaldi Rinaldi , Winata Wahyu Fajar , Anggraini Febri Juita , Yanti Ika , Yulianti Tiara
Published: April 2021

Peat waters were abundant in the West Tanjung Jabung Regency of Jambi Province. Peat water contains manganese metal ion concentration that exceeds the clean water quality standard. Previous studies have been conducted to reduce levels of manganese in peat water, but the results have not been significant. This study aims to reduce levels of Manganese metal in peat water using the composition of Bentonite and Biochar. The adsorption process was carried out at room temperature (29 °C) with a stirring of 200 rpm. Some parameters measured were optimum pH of adsorption, optimum contact time and the best combination between Bentonite and Biochar. Manganese ion concentration in solution was measured using atomic absorption spectroscopy (AAS). The results of this study indicate that the optimum conditions for removing manganese ion at pH 5 and contact time 40 minutes. Tests on artificial solutions using 0.2 grams of biochar showed Mn ion removal of 42.91% (C0 = 100 mg/L, Ce = 57.09 mg/L, V = 100 mL). The best combination obtained in Bentonite: Biochar (1:2) with a mass of 0.080 gr and 0.170 gr, respectively, which able to remove 91.29% manganese ions in peat water.
Treatment of Salt for Food-Grade Using Activated Carbon
Authors: Riyanto  , Purnawati A. Sofia
Published: April 2021

The research on the effect of treatment of salt for food-grade using activated carbon has done. The purified salt in this study was obtained from the Bringharjo market, Yogyakarta, Indonesia. The purification of salt has been done using activated carbon with various weights are 2.5, 3, 4 g. Other chemicals used as a material to remove impurities are Na2C2O4 and Na2CO3. Activated carbon 2.5 g was the salt product with the level of NaCl is 97.28%. Metal content of the Mg, Ca, Pb, and Cd in salt are 0.02%, 0.019%, 10.33 mg/kg, and 2.055 mg/kg, respectively. As a conclusion is, salt produced with treatment using activated carbon can be used for food grade.
Influence of Magnetic Field on Level of Linearly Polarized Laser Beam Passing through Faraday Crystal
Authors: Zyoud Samer H. , Abdelkader Atef , Zyoud Ahed H. , Holi Araa Mebdir
Published: April 2021

Many natural materials have the ability to rotate the polarization level of linearly polarized laser beam and pass through it. This phenomenon is called optical activity. In the event that a light beam (linearly polarized) passes through an optically active material, such as a quartz crystal, and projected vertically on the optical axis, the output beam will be polarized equatorially, and the vibration level will rotate at a certain angle [1], [2], [3]. A number of crystals, liquids, solutions, and vapors rotate the electric field of linearly polarized light that passes through them [4], [5], [6], [7]. Many different physical effects are applied to optical isotropic and transparent materials that cause them to behave as optical active materials, where they are able to rotate the polarization level of the polarized light linearly and pass through it [8], [9], [10]. These effects include mechanical strength, electric field, and magnetic field. By placing one of these effects on an optically transparent medium, it changes the behavior of the light travelling through it [11].
Numerical Study of Heat Transfer in Rectangular Fins for Different Cases of Thermo-Physical Properties
Authors: Bennia Imene , Benabdallah Tawfik , Lounis Samah
Published: April 2021

The present work is a contribution to the development of a calculation code that determines the temperature field on fins having rectangular geometry for any bi-dimensional or three-dimensional simulation conditions. Different cases of simulations are presented. An implicit finite volume method, unconditionally stable, is extended in this study for the discretization of the governing equations. The representative results, validated by the Ansys code, show that the fin temperature increases with the increase of the temperature values selected as the boundary conditions, with the addition of a heat flow or any additional heat source. The numerical results are very consistent with the theory and the results obtained from commercialized codes. By increasing the diffusivity one converge more quickly towards the stationary solution. Upon reducing the fin size a very drastic shift occurs from the transient regime to a permanent one. In the case of a refinement of the mesh, the use of a very small epsilon ensures the convergence. Therefore, the results obtained in this study serve as basis of comparison with any other study on heat transfer on rectangular fins.
Stress Distribution on the Cracked Sandwich Plate with Non Linear Thermal and Moisture Concentration
Authors: Kesba Mohamed Khodjet , El Meiche Noureddine , Benkhedda A.
Published: April 2021

The influence of linear and non-linear temperature and moisture concentration distribution on the stress distribution was studied for metal/ceramic sandwich plate with transverse cracks. An interlaminar adhesive layer between two different layers is taken into account which transferring the normal stress and the interlaminar shear stress. The validation of the used model was done with the comparison of the stiffness reduction as a function of crack density and the experimental data. A comparison showed that a satisfactory qualitative and quantitative agreement was obtained. The temperature and moisture concentration variation are studied using the linear and non-linear distribution around the cracks to predict the stress distributions along the axis x. Finally, it observed through this study that the variations of the thermal and moisture concentration distribution largely impact the stress distribution for a sandwich plate with transverse cracks in the central layer and also with different mechanical properties of each layers.
Development of Banana/Coir Natural Fibers Reinforced Polypropylene Hybrid Composites: The Effect of MA-g-PP (Maleic Anhydride Grafted Polypropylene) on Mechanical Properties and Thermal Properties
Authors: Bujjibabu Gunturu , Das Vemulapalli Chittaranjan , Ramakrishna Malkapuram , Nagarjuna Konduru
Published: April 2021

Banana/Coir fiber reinforced polypropylene hybrid composites was formulated by using twin screw extruder and injection molding machine. Specimens were prepared untreated and treated B/C Hybrid composites with 4% and 8% of MA-g-PP to increase its compatibility with the polypropylene matrix. Both the without MA-g-PP and with MA-g-PP B/C hybrid composites was utilized and three levels of B/C fiber loadings 15/5, 10/10 and 5/15 % were used during manufacturing of B/C reinforced polypropylene hybrid composites. In this work mechanical performance (tensile, flexural and impact strengths) of untreated and treated (coupling agent) with 4% and 8% of MA-g-PP B/C fibers reinforced polypropylene hybrid composite have been investigated. Treated with MA-g-PP B/C fibers reinforced specimens explored better mechanical properties compared to untreated B/C fibers reinforced polypropylene hybrid composites. Mechanical tests represents that tensile, flexural and impact strength increases with increase in concentration of coupling agent compared to without coupling agent MA-g-PP hybrid composites . B/C fibers reinforced polymer composites exhibited higher tensile, flexural and impact strength at 5% of Banana fiber, 15% of fiber Coir in the presence of 8% of MA-g-PP compared to 4% of MA-g-PP and untreated hybrid composites. The percentage of water absorption in the B/C fibers reinforced polypropylene hybrid composites resisted due to the presence of coupling agent MA-g-PP and thermogravimetry analysis (TGA) also has done.
A Layered Approach for Merging Application Ontologies: A Case Study from Agriculture Domain
Authors: Amarasinghe S. A. A. , Indika Walisadeera Anusha , Goonetilake Jeevani
Published: April 2021

Ontology is a machine interpretable way of representing knowledge in a precise and complete way favorable to solve many problems in the field of knowledge engineering. Different knowledge areas evolve with the time and the applications which use ontologies should be updated with new knowledge accordingly. It is more effective to combine the ontologies with new knowledge with the existing application ontologies rather than designing a new ontology from scratch. When combining ontologies, keeping the original usability of the initial ontologies and the heterogeneity of the components of the ontologies are the main obstacles. As there are no universal standard for naming of ontology components, this is a major reason for the heterogeneity problem. Methods for overcoming these problems are needed. In this research, we have proposed two algorithms to overcome the aforementioned problems. These algorithms for finding correspondences of ontology concepts and merging domain specific application ontologies keeping the original usability of the initial ontologies are the main outcomes of this research. The proposed algorithms are evaluated in terms of accuracy by comparing the resultant ontology merged using the proposed algorithm and the resultant ontology merged by an expert. The evaluation results prove that the proposed methodology merges the domain specific application ontologies very similar to the ontology merged by human intervention.
Cardiac teleconsulting in the time of COVID-19 global pandemic: The “Antonio Cardarelli” Hospital project
Authors: Bossone Eduardo , Mauro Ciro , Maiellaro Alfonso , Raiola Eliana , Cocchia Rosangela , Ranieri Brigida , Sepe Chiara , Capone Valentina , Chianese Salvatore , Maramaldi Renato , Acerra Enrico Pasquale , Mirto Gaetano , Lodato Sergio , Russo Giuseppe , Longo Giuseppe
Published: April 2021

Dear Editor,
Teleconsulting - defined as real-time consultation between doctors by exploiting video conferencing technology over the Internet network - is exponentially being implemented through the western world lastly triggered by COVID-19 pandemic...
Correlation between maxillary cuspid impaction with available space and anomalies of maxillary lateral incisors
Authors: Rohani Kimia , Eslamian Ladan , Nahvi Golnaz
Published: April 2021

Background:

Association of cuspid impaction with adjacent lateral incisor anomalies is under controversy. The aim of this study was to investigate the correlation between maxillary cuspid impaction with dental anomalies.

Material and Methods:

In this in vitro experimental study, the material consisted of pretreatment dental records of 102 patients with at least one palatally or buccally displaced impacted permanent cuspid (palatal and buccal impaction groups). They were matched with a comparison control group of 102 patients having normally erupted maxillary cuspids. Available space, mesiodistal dimensions of teeth, and morphologic parameters of lateral incisors were measured using the digital caliper. Comparison of mean values of lateral incisors anomalies and severity of crowding between different groups were performed using the one-way ANOVA test, and the analysis of associations between position of the impaction and anomaly of the lateral incisors and severity of crowding was performed using the Chi-square test. P < 0.05 was considered statistically significant.

Results:

There was no statistically significant difference in the arch length–tooth size discrepancy between the cuspid impaction groups and control group. The impaction group (buccal or palatal) presented statistically significant differences in terms of anomalies of maxillary lateral incisor compared to the control group. Peg-shaped lateral incisor was related to buccal cuspid impaction and microdontia had relationship with palatal cuspid impaction.

Conclusion:

There is the relationship between cuspid impaction and adjacent lateral incisor abnormality, but no difference was observed between buccal and palatal cuspid impactions. Crowding revealed no relationship with cuspid impaction (buccal or palatal) in this study.
A new classification of peri implant gaps based on gap location (A case series of 210 immediate implants)
Authors: Deporter Douglas , Khoshkhounejad Ali Akbar , Khoshkhounejad Nikfam , Ketabi Mohammad
Published: April 2021

Based on our collective experiences with gap management around immediate dental implants, we have proposed a classification of gap type based on the location in relation to implant periphery. Seven types are proposed, and all but one type should heal without gap grafting provided that flap-less surgery and atraumatic extraction have been achieved. The exception is our Type II gap where the implant has been placed too far buccally leaving a gap only on the lingual/palatal. In this case, the lingual/palatal gap need not be grafted, but the buccal aspect of the implant should best to augmented to avoid the complications.
Community-Based Yoga for Women Undergoing Substance Use Disorder Treatment
Authors: Galantino Mary Lou , Turetzkin Sarah , Lawlor Shauna , Jones Lafutima , Brooks Jennifer C
Published: April 2021

Background:

Women with substance use disorders (SUD) receive medication-assisted treatment (MAT) with behavioral interventions and counseling for recovery. Evidence supports the use of yoga for SUD; however few studies specifically feature women.

Objectives:

Community-based yoga may add to health promotion through preferable physical activity for women in recovery. The aims of this study are to explore demographics and quantitative measures relevant to recovery and capture and understand the subjective experience of one session of yoga.

Study Design:

The study design involves Descriptive/Cross-sectional.

Methodology:

Women in an inpatient SUD center attending weekly optional off-site yoga for recovery were recruited to capture first-time attendance. Survey data included Medical Outcomes Survey 12-item short-form (SF-12), Toronto Mindfulness Scale (TMS), and Brief Resilience Scale (BRS), demographics, and narrative reflections. Recruitment opportunities occurred weekly during ongoing hour-long classes.

Results:

Twenty-nine women (average age 36.6) with primarily opiate-based addictions completed surveys. SF-12 was below the normative value of 50 for both subscales. BRS scores showed averages on the low end of normal resiliency. The frequency of responses to writing prompts confirmed physical and mental well-being through yoga intervention. Women shared potential relapse prevention specifically attributed to the mindfulness component of the intervention.

Conclusion:

The SF-12, BRS, and TMS are brief, valid, and reliable and can be easily incorporated in clinical practice or future research. Suboptimal SF-12 scores were found in women with SUD and, therefore important to note in the context of recovery to optimize treatment. Subjective reports from the participants find community-based yoga an enjoyable and beneficial type of physical activity. Yoga may be a viable option for comprehensive mind-body intervention for this population.
Effects of Yoga Exercises on Diabetic Mellitus as Validated by Magnetic Resonance Imaging
Authors: Honnedevasthana Arush Arun , Vatsalya S , Chikop Shivaprasad Ashok , Geethanath Sairam
Published: April 2021

Context and Aims:

Effects of practicing yoga in diabetic mellitus (DM) patients have been identified to improve in control of blood glucose levels. The purpose of this work is to evaluate changes in blood flow of calf muscles after specific yoga postures for patients with DM using magnetic resonance imaging (MRI) techniques. Time of flight (TOF) magnetic resonance angiography maximum intensity projection (MIP), T1 maps, T2 maps, and diffusion-weighted Imaging are performed on volunteers and DM patients both pre- and post-exercise.

Materials and Methods:

TOF MIP, T1 maps with variable flip angles, and T2-weighted spin-echo imaging were performed on four volunteers (aged 30 ± 5) and DM patients (aged 32–68) preexercise, on a 1.5 T Siemens scanner. The total acquisition time was 6 min 20 s. Each volunteer and DM patient were then requested to perform yoga postures Supta Padangusthasana, Utkatasana, and Calf raise for 6 min 30 s at maximum effort, outside the scanner, and subsequently rescanned. To calculate significant signal increase, region of interests was drawn on TOF MIP coronal images in arteries of calf muscles. Student t-tests were performed to determine statistical significance.

Results:

Among volunteers, a significant signal increase in arteries of calf muscles was noticed, signal intensity graphs were plotted. In DM patients, signal increase in TOF MIP, T2-weighted images were seen in specific arteries (posterior, anterior tibial, and posterior tibial) of calf muscles postexercise.

Discussion and Conclusions:

The study indicates that yoga has a positive short-term effect on multiple DM-related foot complications. This study depicts that MRI provides potential insight into the benefits of yoga for DM patients through deriving biomarkers for preventive medicine relevant to yoga interception.
An unusual variation of infrahyoid musculature and its clinical implications
Authors: Gonzalez-Soler Eva María , Blasco-Serra Arantxa , Martinez-Soriano Francisco , Valverde-Navarro Alfonso A.
Published: April 2021

Knowledge of the anatomy of musculoskeletal system of the anterior neck region is crucial for the good practice of health personnel. In this area, both muscular and vascular systems are closely related, and the anatomical variations that may occur could alter blood conduction or hinder medical and surgical maneuvers. This study reports a case of unilateral duplicated omohyoid muscle and its merger with an anomalous sternohyoid muscle with an intermediate tendinous formation and discusses its clinical importance. This alteration might have represented a problem at a surgical reconstruction of diverse neck structures, in case of having specified one. Besides, a large-flow collateral vein system has been observed, which could also have played an important role in the consequences of this anatomical muscle variation. Thus, it is considered as of importance to report on the anatomical variations found in human dissections, both for basic science researchers and for professionals dedicated to clinical science.
Study of Histological Changes of Placenta in Pregnancy-Induced Hypertension in Poorvanchal Region of Uttar Pradesh, India
Authors: Singh Vishram , Ranjan Kumud , Tewarson S. L. , Singh Rashi , Yadav Yogesh
Published: April 2021

Introduction:

The placenta is a fetomaternal organ. It is a connection of the fetus with the uterine wall of mother. Through the placenta, exchange of gases and nutrient supply takes place. Through the placenta, fetal blood tissue comes in direct contact with the maternal blood without any rejection. It is a special transient organ of pregnancy. In our study, we carried out the microscopic examination of the placenta in pregnancy-induced hypertension, i.e., syncytial knot, cytotrophoblastic cellular proliferation, fibrinoid necrosis, endothelial proliferation, and calcified villous spot.

Material and Methods:

One hundred and fifty-two placentas of full-term pregnancy were collected from the labor room/operation theater of the Gynecology and Obstetrics Department of the Government Medical College and Superfacility Hospital Azamgarh. Out of one hundred and fifty-two placentas, 76 cases were controls from mothers with no known history of preexisting hypertension and 76 were collected from mothers with pregnancy-induced hypertension. Placentas were kept in 10% formalin for 24 h for fixation. After 24 h, tissues of placentas were passed through a series of the procedures from dehydration and clearing to wax impregnation before being sectioned from automated microtome. Time took for processing was 24 h. Five microns thick tissues sections were cut. Prepared slides were mounted in DPX and covered with the cover slip. Through binocular light, microscope slides were examined at ×10, ×40, and ×100 magnifications.

Results:

Histology in our study revealed that syncytial knots were present in placentas of all 100% of hypertensive and only 32.89% of normotensive mothers. Cytotrophoblastic proliferation was seen in 98.68% and 19.73% placentas of hypertensive and normotensive mothers, respectively. Fibrinoid necrosis of placenta was found in 88.15% of hypertensive and only 28.94% of normotensive mothers. The 100% placentas of the hypertensive mothers had endothelial proliferation as compared to controls. Calcified villous spots were seen in 84.21% and 31.57% of placentas of hypertensive and normotensive mothers, respectively.

Discussion and Conclusion:

Pregnancy-induced hypertension adversely affects the health of the fetus through its harmful effects on the placentas. Syncytial knots, cytotrophoblastic cellular proliferation, fibrinoid necrosis, endothelial proliferation, and the calcified villous spots were present more in the placentas of hypertensive mothers in our study in comparison to the study of other authors. In our research, we found that endothelial proliferations were present in all placentas. If proper treatment is given to the mother in the early stage of pregnancy, it may prevent the death of a fetus. Hence, this study helps the clinician for early diagnosis and treatment of pregnancy-induced hypertension.
Vascular Anatomy of Distal End of Femur and Its Clinical Implications
Authors: Bhat Deepa , Doddaiah Sunilkumar , Murugesh Pushpalatha , Pushpa N. B.
Published: April 2021

Introduction:

The distal end of the femur is a highly vascular tissue with unique features in its blood supply. The outcome of surgical interventions is determined by the interference of corresponding blood supply. The study examines the pattern of blood supply in terms of density, size, and direction of vascular foramina (VF) to the distal end.

Material and Methods:

The lower end of normal adult dry femora (n = 300) was divided into segments. The number, size, and direction of VF in each segment were documented. Wilcoxon signed-rank test identified the statistical difference in the number of VF between various segments and Friedman test compared the difference between segments of two sides.

Results:

The maximum average number of VF was observed in medial condylar surface while minimum in central part of intercondylar region. Condylar medial recorded the highest number of VF of all sizes. The number of VF of >2 mm size was found to be significantly different between right and left in right condylar lateral and right intercondylar posterior regions. Right condylar lateral had considerably large number of VF of >2 mm size with statistical significance (P = 0.000). A Friedman test indicated that segements of two sides rated differently.

Discussion and Conclusion:

The density of VF through which vessels traverse at lower end were not only numerous but also constant and uniformly scattered. Detailed understanding of the arterial anatomy of lower end helps to identify and localize vascular pedicles, thus ensuring vitality of graft as well as donor site.
Chromosomal Microarray in Isolated Congenital and Developmental Cataract
Authors: De Guimarães Thales A. C. , Capasso Jenina E. , Bello Nicholas R. , Wangtiraumnuay Nutsuchar , Lingao Michelle D. , Wuthisiri Wadakarn , Lai Yu-Hung , Johnson Erica S , Zanolli Mario , Khetan Vikas , Bajaj Renu , Wang Zi-Xuan , Peiper Stephen C. , Levin Alex V
Published: April 2021

Introduction:

The etiologies of congenital and developmental cataracts are diverse. Most are not syndromic and have no identifiable cause, thus creating a diagnostic dilemma. We investigated the utility of chromosomal microarray in identifying the etiology of isolated childhood cataracts.

Methods:

Patients with congenital or developmental cataracts without other associated abnormalities received a single-nucleotide polymorphism (SNP) microarray. copy number variations (CNV) and regions of homozygosity (ROH) were compared with previous literature reports and analyzed for candidate genes to assess pathogenicity.

Results:

We enrolled 37 patients. The mean age of the patient population was 10.98 years old. Nineteen patients (51.4%) had bilateral cataract. Positive family history was found in 11 patients (29.7%). Eighteen patients (48.7%) had a variant on microarray: 10 (27%) with CNV, 5 (13.5%) with ROH, and 3 patients (8.1%) with both CNV and homozygosity. In five patients (13.5%), we found a potentially causative cataract gene within an ROH.

Discussion:

There is a high rate of notable findings among the CNV and ROH detected. Three patients were homozygous in a region known to have a cataract gene suggesting a possible autosomal recessive disease. In those with CNV, segregation would help to affirm the pathogenicity of these regions and may lead to the identification of new genes.

Conclusion:

SNP microarray had a surprisingly high rate of notable findings in patients with isolated cataract and may reveal the opportunities for genetic counseling, lead to discovering new cataract genes and identify additional affected genes that could lead to other clinical abnormalities.
Ocular Symptoms and Clinical Profile Associated with COVID-19
Authors: Suvvari Tarun Kumar , Kumar Kandula Venkata Dinesh
Published: April 2021

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), a highly contagious pathogen, led to the coronavirus disease 2019 (COVID-19) pandemic. Ocular secretions can be one of the possible causes of SARS-CoV-2 transmission, and it should not be ignored. In the group of severe COVID-19 complications, ocular manifestations are underreported, and elucidation of ocular signs among COVID-19 patients is necessary. According to many research studies, conjunctivitis and sore eyes were the most reported ocular symptoms. Many studies have limitations such as low sample size or lack of proper findings, and much more studies need to be performed for a better inference.