bluuebunny/crossref_metadata_2025 huggingface dataset:
A first study on the zooplankton-cyanobacteria interactions in Karaoun reservoir (Lebanon) during 2016-2017
Authors:   Laboratory of Microorganisms and Food Irradiation, Lebanese Atomic Energy Commission-CNRS, P.O. Box 11-8281, Riad El Solh, Beirut 1107 2260, Lebanon, Slim Kamal , Fadel Ali ,   National Center for Remote Sensing, National Council for Scientific Research, P.O. Box 11-8281, Riad El Solh, Beirut 1107 2260, Lebanon
Published: March 2021

The planktonic organisms are characterized by their strong capacity of reproduction as well as a high death rate. The factors that intervene simultaneously and result in the seasonal succession and change in the planktonic community are not well studied, especially in Middle East fresh water bodies. Stratification, nutrients, oxygen and light intensity can lead to an increase in phytoplankton and cyanobacteria biomass. In this study, we monitor the interaction between zooplankton and cyanobacteria in Karaoun Reservoir, the largest freshwater body in Lebanon. Karaoun Reservoir has gone through a degradation of its water quality and eutrophication with a very low phytoplankton biodiversity and a dominance of two toxic cyanobacteria species (Microcystis aeruginosa and Aphanizomenon ovalisporum) forming a thick bloom that persisted during the years 2016 and 2017. This spring bloom assured the development of small cladoceran, rotifers that were replaced progressively by big cladoceran such as Daphnia and by copepods Calanoides. Having strongly contributed to the exhaustion of their food resources and being equally submitted to a strong predation from the zooplankton feeding fish such as the carps, the zooplanktonic species decrease gradually till their total disappearance at the beginning of summer. The lake's zooplankton does not proliferate until the end of spring and disappears completely after. The environment rich in cyanotoxins does not seem to be responsible for this decrease. This was attributed to the grazing by Cyprinus carpio. The cycle of these species pass through a period of spring reproduction which allows the zooplankton to develop without being reduced by these fish species.
Development of novel corrosion resistant electroless NI-P composite coatings for pipeline steel
Authors:   Department of Chemical Engineering, Lebanense University, Tripoli, Lebanon, Chaar Omar , Jarjoura George ,   Department of Mechanical Engineering, Dalhousie University, Halifax, NS, Canada B3J 2X4, Farhat Zoheir ,   Department of Mechanical Engineering, Dalhousie University, Halifax, NS, Canada B3J 2X4, Nader Rami ,   Department of Chemical Engineering, Lebanense University, Tripoli, Lebanon
Published: March 2021

In this research, coatings with various particles contents will be co-deposited within Ni–P deposits on AISI 1012 steel samples by electroless coating process. As a result, structural changes were evaluated, surface and cross-section morphology of composite deposits have been investigated by scanning electron microscopy (SEM), volumetric percentage of co-deposited particles have been determined using EDS analysis system, corrosion resistance of various EN coatings and current density were studied through potentiodynamic polarization, and mechanical properties were evaluated using wear and nano-indentation tests. The results showed that Alumina can give the best compromise between surface smoothness and deposition rate, Titanium can reach the highest levels of volumetric incorporation whereas Carbon can improve further lubrication effect on wear action, finally hardness and corrosion behavior had the best results with the existence of Alumina.
L’émigration libanaise récente de 1975 à nos jours: réseaux éclatés et isolés ou Diaspora « atypique » ?
Authors:   École doctorale « Sciences de l’homme et de la société » (EDSHS), Faculté des lettres et sciences humaines (FLSH), Université Saint-Joseph, Beyrouth, Abi Rached Reine
Published: March 2021

Dans un contexte où la participation des émigrants libanais est de plus en plus sollicitée, nous nous sommes intéressés à la présence des expatriés libanais dans le monde, en particulier ceux appartenant à l’émigration récente. S’agit-il d’un ensemble de réseaux isolés et éclatés ou d’une diaspora « atypique » ? Nous avons constaté que le nombre d’émigrés libanais appartenant à la vague d’émigration récente est loin d’être négligeable comparativement au nombre de la population libanaise résidente. Bien que le profil de l’émigrant se soit diversifié à la fin de la guerre civile libanaise, les causes et motivations de l’émigration demeurent les mêmes. De plus, nous avons mis en évidence le fait que les champs migratoires existant depuis la moitié du XIXème siècle entre le Liban et plusieurs régions du monde ont été réactivés à partir de 1975. Ceci a contribué à la naissance d’importants réseaux de relations entraînant le fondement d’une diaspora atypique à travers le temps (relations inter-diasporiques et relations avec le pays d’origine). L’inscription de ces réseaux dans un réseau ethnique purement libanais contribuerait à une meilleure dynamique entre les membres de cette diaspora. La méthodologie adoptée consiste en une recherche documentaire et une analyse qualitative du contenu.
A new description of a specific plant in Lebanon
Authors:   CNRS BP 11 8281 Beirut, Lebanon, Tohmé Georges , Tohmé Henriette ,   CNRS BP 11 8281 Beirut, Lebanon
Published: March 2021

In this note, the authors give a new description of Glaucium grandiflorum cited in 2007, but not in 2014.
First assessment of hybrid sparrow (Passer Domesticus x P. Hispaniolensis) damage on cereal crops in Ouargla (Algeria)
Authors:   Kasdi Merbah Ouargla University, Ouargla, Algeria, Benras Hafsa , Guezoul Omar ,   Faculty of Naturaland Life Science, Saharan Bio-Resources Laboratory: Preservation and Development, Université Kasdi Merbah University, Ouargla 30000, Algeria, Benghedier Ahlame ,   Faculty of Naturaland Life Science, Saharan Bio-Resources Laboratory: Preservation and Development, Université Kasdi Merbah University, Ouargla 30000, Algeria, Korichi Atika ,   Faculty of Naturaland Life Science, Saharan Bio-Resources Laboratory: Preservation and Development, Université Kasdi Merbah University, Ouargla 30000, Algeria
Published: March 2021

The current study was carried out in 2016 and 2017 in eight cereal farms in Ouargla, in the north of Algerian Sahara. The damage caused by hybrid sparrows on cereals (barley and wheat) showed that the loss due to individuals of (Passer domesticus x P hispaniolensis)on cereal plots varies between the visited farms and fluctuates between 0.28% (0.22 qls / ha) and 15.6% (10.8 qls / ha). In general, the damage caused by the sparrows was found to be more important on the periphery of the plots than in the centersof these plots. A significant relationship was found between the rate of damage and the approach of cereal plots to tree blocks, and the density of ears per sampled square. A good decision on the position of cereal plots within farms seems tobe a priority to avoid sparrow attacks.
Characterization of natural Lebanese clays for the preparation of ceramic membranes designed to water filtration
Authors:   Institut Européen des Membranes, UMR 5635, Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM), CNRS, Université Montpellier 2, 276 rue de la Galéra, F34000 Montpellier (France), El Korhani Oula ,   Applied Physic Laboratory (LPA), EDST, Lebanese University, Faculty of Sciences II, P.O. Box 90239, Jdeidet (Lebanon), Souaidan Maher ,   EDST-Platform for Research in Environmental Sciences, Lebanese University, Faculty of Sciences I, P.O. Box 26011217, Beirut (Lebanon), Zaouk Doumit ,   Applied Physic Laboratory (LPA), EDST, Lebanese University, Faculty of Sciences II, P.O. Box 90239, Jdeidet (Lebanon), Khoury Randa ,   Lebanese University, Faculty of Agronomy, P.O. Box 90239, Jdeidet (Lebanon), Cornu David ,   Institut Européen des Membranes, UMR 5635, Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM), CNRS, Université Montpellier 2, 276 rue de la Galéra, F34000 Montpellier (France)
Published: March 2021

The potentiality of natural Lebanon minerals for the fabrication of ceramics membranes has been investigated for the first time, opening new perspectives for the development of local, low-cost and sustainable processes for water filtration. Natural clay deposits, originated from North (Kousba, El-Koura), South (Hasbaya) and East (Rashaya, south of the Beqaa valley) regions of Lebanon were collected and investigated in terms of chemical, mineralogical and thermal features. The phase and chemical transformations occurring during heat treatments of these clays were studied by X-ray diffraction (XRD), thermogravimetric analysis (TGA), scanning electron spectroscopy (SEM), and X-ray fluorescence (XRF), in view of their uses as membranes for water purification. Flat membranes were prepared by roll-pressing of clay pastes followed by pyrolysis. The mineral membranes were characterized in terms of porosity and water flux.
Removal of Cibacet Blue (CB) by Adsorption onto an Algerian Red Slag
Authors:   Hydrogen EnergeticalApplication Laboratory (HEAL), Department of Chemical Engineering .University of Blida, Soumaa, 9000 Blida, Algeria, Teboul Fatima , Naceur Mohamed ,   Hydrogen EnergeticalApplication Laboratory (HEAL), Department of Chemical Engineering .University of Blida, Soumaa, 9000 Blida, Algeria, Cheknane Benamar ,   Hydrogen EnergeticalApplication Laboratory (HEAL), Department of Chemical Engineering .University of Blida, Soumaa, 9000 Blida, Algeria, Maazouzi Abdelhak ,   laboratoire ENERGARD University of Béchar,Algeria
Published: March 2021

This study is based on the implementation of a composite material with absorbent properties for the elimination of organic pollutants.In our case we used the slag (red slag)from the region of Bechar, (South-East of Algeria). Characterization using DRX and Fourier transforms infrared spectrometer(FT-IR), shows that, we were able to prepare adsorbents with very interesting structural and mechanical properties. The effectiveness of obtained adsorbents was evaluated in the removal of Cibacet Blue (CB) dye using the adsorption process. Kinetic resultswith an elimination rate of 83 % show that, the time to equilibrium is influenced by experimental conditions such us, contact time, pH, initial concentration, temperature and adsorbent mass. Pseudo-first order model represent very well our experimental results with adjustment coefficients (R2) close to 1. Modeling of adsorption isotherms of the CB dye on the red slagshows that both models of Langmuir and Freundlich can present our results with acceptable adjustment coefficients (R2> 0.995).
Annotated Checklist of the Marine and Coastal Birds of Lebanon
Authors:   National Council for Scientific Research, P.O.Box 118281, Beirut, Lebanon  Faculty of Science, Lebanese University, Hadath, Lebanon, Ramadan-Jaradi Ghassan
Published: March 2021

The study of marine and coastal birds in the Lebanon recorded 75speciesalong the shore line of Lebanon and for a distance of 7 kms offshore.Of those species,35 are seabirdspecies, 38 marine or seawater/freshwater coastal birds, and 2waterbird specieswintering on the archipelagoes of Mina/Tripoli in North Lebanon (Grey Heron and Little Egret)with apparently much affinity to seawater in the winter season. This study highlighted 3 globally threatened species (Leach’s Storm Petrel Hydrobates leucorhoa [Vulnerable], Mediterranean Yelkouan Shearwater Puffinus yelkouan [Vulnerable], and Dalmatian Pelican Pelecanus crispus [Vulnerable]), underlined7 globally Near Threatened avian species, pointed out to 3 species that may be submitted for reconsideration bythe “Lebanon Bird Record Committee” (LBRC) at LCNRS;and updated the data of 9species of high significance from the past studies, of which, 2 species are upgraded from vagrants to winter visitors/passage migrants, one to passage migrant and one to wintervisitor..Regarding the final phenological statusesof species, one is resident breeding, one is summer breeding, 3 are formerly bred, one extirpated (extinct) from Lebanon 31are passage migrant/winter visitors, 25passage migrantsonly, 2winter visitors and 14vagrant species.
Removal of heavy metals from an industrial effluent by synthesized zeolite: Case of Bounoura industrial zone
Authors:   Laboratoire de mathematiques et sciences appliquées Université de Ghardaia BP 455 Ghardaia-Algeria, Hanane Bahaz , Abdelkader Hadj Seyd ,   Laboratoire de mathematiques et sciences appliquées Université de Ghardaia BP 455 Ghardaia-Algeria,   Faculté des Hydrocarbures Université KASDI MERBAH Ouargla BP 511 Ouargla-Algérie, Kromia Moulai ,   Facultédes Sciences et Technologies Université de Ghardaia BP 455 Ghardaia-Algeria, Salah Aggoune ,   Laboratoire de mathematiques et sciences appliquées Université de Ghardaia BP 455 Ghardaia-Algeria
Published: March 2021

The aim of this paperis the synthesis of a Faujasite type zeolite: 9SiO2: Al2O3: 3Na2O: 120H2O and study its ability to remove heavy metals from an industrial effluent.Characterization of the zeolite was carried out by X-ray diffraction analysis (XRD), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM).The study of the elimination of ten heavy metalson anaqueous effluent, taken from the industrial zone of Bounoua(Algeria),showsthat the synthesized zeolite is able to eliminate nearly 40% of the analyzed heavy metals. the results demonstrate a removal rates of metals in a descreasing order, as following: Cd > Mn > Sn > Fe > Cr > Ni > Pb > Mg > Zn > Cu.Cadmium is the most adsorbed metal with a rate of86.47 % and copper takes the last position with a removal rate of19.27 %.The kinetics and isotherms study of adsorbtion of cadmiumby zeoliteshows that the adsorption is managed by kinetics of the pseudo-second order and the Langmuir isotherm represents better the adsorption of this metal.The study demonstrates that, besides the economy, zeolite facilitates the process of adsorbtion. Moreover, the zeolite is very efficient and reliable material to eliminate the heavy metals and to mitigate the problems of pollution of the environment causedby the industrial activities.
Amostras de integração Artística: transferência de estilo em imagens usando Redes Neurais
Authors: Correia Carlos Henrique Gomes , Komati Karin Satie , Boldt Francisco De Assis
Published: March 2021

Este trabalho faz um ensaio de combinação de duas imagens, denominadas de imagem-estilo e imagem-conteúdo, através de um sistema computacional. Tal sistema faz a transferência de estilo da imagem-estilo para a imagem-conteúdo, transportando a experiência visual, tais como paleta de cores, sombras e padrões de pinceladas da imagem-estilo e preservando as formas e objetos da imagem-conteúdo. Tal sistema que integra arte e tecnologia utiliza Rede Neural Artificial, técnica inspirada no modelo biológico. Para as amostras foram selecionadas fotos de locais ícones nacionais como imagens-conteúdo, e obras de artistas brasileiros para serem as imagens-estilo.AbstractThis work makes an essay of combining two images, called image-style and image-content, through a computer system. Such a system transfers the style of the image-style to the image-content, transporting the visual experience, such as the color palette, shadows and brush strokes of the image-style and preserving the shapes and objects of the image-content. Such a system that integrates art and technology uses Artificial Neural Network, a technique inspired by the biological model. For the samples, photos of local national icons were selectedas content images, and works by Brazilian artists to be the style images.
Lorenzo Fernândez: considerações sobre sua contribuição à Música Brasileira da primeira metade do Século XX
Authors: Barros José D'Assunção
Published: March 2021

Este artigo propõe a apresentar e discutir a obra musical de Lorenzo Fenandez, considerando-a do ponto de vista de sua possível divisão em fases e orientando a análise em torno de aspectos que incluem (1) o modelo de utilização do folclore musical empregado em suas obras nacionalistas; (2) a especificidade formal dos padrões composicionais de Lorenzo Fernândez e sua utilização de formas musicais diversas; (3) a variedade de gêneros musicais percorrida pela atividade composicional deste autor AbstractThis article aims to discuss the musical work of Lorenzo Fenândez, examining it on the perspective on the possibility of considering this work in different phases and directing the analysis around aspects that include (1) the pattern of utilization of the musical folklore used in his nationalistic works, (2) the formal specificity of the compositional models of Lorenzo Fenândez and their utilization in various musical forms, (3) the variety of musical genders experienced by the compositional activity of the author.
A Grade
Authors: Caló Susana
Published: March 2021

Este ensaio enceta uma discussão em torno do protocolo experimental chamado 'grille', desenvolvido na clínica La Borde fundada por Jean Oury em 1952. O ensaio aborda o projecto da psicoterapia institucional refletido na grade. Oferece uma visão da grade como um instrumento de criação coletiva contínua da instituição de cuidado, com efeitos terapêuticos para todas as pessoas envolvidas, desde o pessoal até aos residentes e monitores. Descrevendo como a grade funcionava através da criação de ligações entre o material e o semiótico, o mental e o organizacional, o social e o ambiental, com o efeito de não só singularizar a trajetória da própria instituição, mas também daqueles que nela vivem, o ensaio salienta a importância dos processos analíticos institucionais em projectos emancipatórios. AbstractThis text presents a close discussion of the experimental protocol called ‘grid’ as developed at the clinic La Borde founded by Jean Oury in 1952. The paper teases out the institutional psychotherapy project reflected in the grid. It offers a view of the grid as an instrument of continuous collective creation of the institution of care, with therapeutic effects to all persons involved, from staff to residents and monitors. Describing how the grid worked by the creation of connections between the material and the semiotic, the mental and the organisational, the social and the environmental, to the effect of not only singularising the trajectory of the institution itself, but also of those living in it, the paper highlights the importance of institutional analytical processes in emancipatory projects.
Sobre ser – ou sobre atos da (não) existência
Authors: The Red Chris,
Published: March 2021

Quando criança, chamaram-me de bichinha. Calado, fiquei.  Pensei: na adolescência, mudará. Quando jovem, chamaram-me de traveca. Calada, continuei. Matutei: na fase adulta, acabará. Quando adulto, abusada fui.  Questionei: o que sou? Nada sou. Não tenho fala. Não tenho identidade e o isolamento imposto, eu já o vivo há anos. Está em cada lágrima, cada chute e olhar. Está nas marcas que carrego, inclusive, as que não podes ver. Este distanciamento que, agora salva; a mim, sempre me machucou. Como no tapa maternal que me proferistes e na mão do pai a apontar a porta da casa que nunca fora um lar. E agora, quando idosa, nada pronunciaram, já não se importam.
A Estética da Descolonização em Psicoterapia: Psicoterapia Institucional e o Paradigma Ético-Estético de Fanon
Authors: Faramelli Anthony
Published: March 2021

Este artigo examinará como o colonialismo e o racismo estratificam o espaço, com foco especial na produção estética e na forma como a liberdade de um indivíduo depende do “ambiente” do espaço que ele ocupa. A análise será fundamentada na psiquiatriacolonial argelina e na psicoterapia anti/de-colonial. Através de uma análise do trabalho de Frantz Fanon da Psicoterapia Institucional no Hospital Blida-Joinville, este artigo argumentará que a política decolonial de Fanon e seu compromisso coma desalienação dependeram da (re)construção do espaço dentro do hospital. Isso também se soma ao que mais tarde Félix Guattari chamaria de “coeficiente de transversalidade”. Por implicação, o argumento deste artigo pretende utilizar a abordagemespacial de Fanon para psicoterapia, a fim de obter uma leitura da Psicoterapia Institucionalem massa como tendo, em seu cerne, um foco na produção espacial e estética.
Sensate Neurovascular Island Flap for Thumb Reconstruction
Authors: Jeon Sungmi , Kim Seung Min , Kwon Sung Tack
Published: March 2021

Thumb pulp defects require adequate reconstruction for satisfactory sensate function and aesthetic appearance. We report a reconstructive case using a sensate neurovascular island flap raised from the ulnar side of the middle finger for a tactile thumb pad defect. The flap was elevated as a modified version of the conventional heterodigital neurovascular island flap in order to restore thumb sensation without the “double-sensibility” phenomenon. The ulnar digital nerve of the flap was sectioned at the middle phalanx level of the donor digit and coaptated to the ulnar and radial digital nerves of the thumb through end-to-side and end-to-end neurorrhaphy. The remaining radial digital nerve of the donor finger was preserved, and the proximal end of the sectioned nerve was coaptated end-to-side to the radial digital nerve to prevent neuroma formation. No postoperative complications including venous congestion were observed. This technique is a relatively simple and reliable option for reconstructing thump pulp defects.
Using DIRECT Wound Assessment to Predict Limb Salvage and Provide Prognosis of Diabetic Foot Ulcers
Authors: Jun Dongkeun , Kwon Yongseok , Bae Jaehyun , Lee Myungchul , Kim Jeenam , Choi Hyungon , Shin Donghyeok
Published: March 2021

Background: Many wound assessment systems including the Wagner classification and University of Texas (UT) grading system have been previously described. The authors of this study applied the DIRECT (Debridement of necrosis, Infection control, Revascularization, Exudate control, Chronicity, and Top surface) wound coding system for initial assessment of diabetic foot ulcers (DFUs) to predict limb salvage and prognosis.
Methods: From January 2016 to February 2020, a total of 169 first-time DFU patients were retrospectively evaluated using the DIRECT wound coding assessment system. DFUs were followed up for at least 6 months, and scores in each component of the coding system according to final limb status were statistically evaluated. The coding assessment’s ability to predict major amputation was compared to those of the Wagner classification and the UT grading system.
Results: Subjects were divided into complete healing (n=80, 47.3%), not healed (n=71, 42%), and amputation (n=18, 10.7%) groups. The mean values of each component of DIRECT assessment for the complete healing/amputation groups were D 0.86/1.56 (P<0.001), I 0.46/0.89 (P=0.001), R 0.65/0.94 (P=0.014), E 1.15/1.56 (P=0.049), C 0.69/0.89 (P=0.086), T 0.53/0.72 (P=0.13) and the sum was 3.140/4.741 (P<0.001). The area under the receiver operating characteristic curve of the DIRECT, Wagner, and UT grading systems was 0.722, 0.603, and 0.663, respectively.
Conclusion: The DIRECT coding system shows a greater association with prediction of amputation or complete healing, compared with the Wagner and UT wound classification systems. This more accurate wound assessment system will be helpful in predicting prognosis and planning treatments.
Closed Irrigation System for Wound Management of Complicated Ischial Pressure Ulcers
Authors: Sung Kun-Yong , Lee Sang-Yeul
Published: March 2021

In patients with complicated ischial pressure ulcers, surgical repair is often delayed until the general condition of the patient improves, and in extremely ill patients, surgery might never be performed. Since deep ischial ulcers are usually associated with a profuse discharge, large sinus cavity, and are adjacent to the anus, maintaining effective dressing is challenging for surgeons. In order to manage such ischial ulcers, we devised a closed irrigation system using the Barovac (50–90 mmHg) wound drainage device and a saline infusion set. The system was applied to a 50-year-old paraplegic man who was diagnosed with impending sepsis due to a longstanding ischial ulcer with secondary infection. Using the saline infusion set, we infused 200 mL of saline into the ischial cavity every 6 hours in the ward. After a 10-minute dwell time, the fluid in the cavity, including the exudate and wound debris, was drained continuously through the wound drainage device. This system was very helpful in keeping the patient’s ischial wound clean until his general condition improved and surgical repair could be undertaken. We therefore believe that our closed irrigation system provides an effective, convenient, and inexpensive dressing method for patients with complicated ischial wounds.
Atypical Signs of Compartment Syndrome Caused by Pressure Injury in Forearm
Authors: Kim Tae Hyung , Choi Hwan Jun , Wee Syeo Young , Chun Jeong Jin
Published: March 2021

Acute compartment syndrome (ACS) is a serious complication which is usually associated with fractures. Herein, we report a case of a patient with volar forearm compartment syndrome associated with closed muscle rupture without fracture of which the only external signs were superficial contact burns and pain. A 21-year-old man presented to our emergency department with painful swelling in the right forearm after being caught in a machine. Although he presented with pain, no open wound or fracture was seen. The patient was presumed to have a contusion and discharged. He presented with worsening pain the next day, when typical clinical features of ACS were observed and emergency fasciotomy was performed. Intraoperatively, ruptured flexor muscles were noted. Delayed presentation of forearm compartment syndrome accompanied by closed muscle rupture without fracture is extremely rare. Diagnosis is not easy because severe pain could be the only clue and can mask the signs of compartment syndrome, at risk of being missed.
Reconstruction of Pretibial Defect Using Bone-Anchored Advancement Flap
Authors: Kim Suhwan , Lee Kyeong-Tae , Park Jin-Woo
Published: March 2021

While free flaps have been widely used for reconstruction of pretibial defects, the extended operation times are known to be a major drawback. This report presents a case of successful lower leg reconstruction for a large pretibial defect with a bone-anchored advancement flap and split-thickness skin graft. A 59-year-old female patient underwent wide excision of sarcoma on the pretibial area. The skin defect measured 14×6 cm with a 10×2 cm exposure of the tibia in the medial aspect of the defect. An advancement flap was elevated from the medial side of the tibia to cover the exposed bone. The bone defect was reconstructed by the advancement flap with the aid of an anchoring suture to the tibia. Remaining defect with exposed muscles was covered using split-thickness skin graft. No immediate postoperative complication developed. One year after the operation, well-contoured reconstruction was achieved without functional morbidities. In reconstruction of pretibial defects, bone-anchored advancement flap can be considered in patients who are reluctant to or have risk factors for free flap reconstruction.
O REVÉS JUDAICO NOS CONTOS DE RAWET E CLARICE
Authors: Pena Thays Freitas de Almeida , Chiarelli Stefania Rota
Published: March 2021

Há diferentes formas de ser judeu. Nesse sentido, esta pesquisa visa refletir acerca das marcas da tradição judaica na trajetória dos autores Samuel Rawet e Clarice Lispector, além de discorrer sobre a maneira particular que os autores vivenciaram o judaísmo. Como aporte teórico, utilizamos os apontamentos de Amós Oz e Fania Oz-Salzberger, Jacó Guinsburg, Michael Brenner, além de outros estudos referentes ao tema em questão. A experiência judaica é vivenciada singularmente: seja pelos costumes, seja pela tradição judaica, por compartilhar uma mesma linhagem ou pelos valores judaicos. Portanto, compreendemos que em Rawet e Clarice o judaísmo é experienciado em suas obras de forma própria.
PALAVRAS-CHAVE: Judaísmo; Tradição judaica; Samuel Rawet; Clarice Lispector.
Mathematical interpretation of seismic wave scattering and refraction on tunnel structures of circular cross-section
Authors: Zlatanovic Elefterija , Sesov Vlatko , Lukic Dragan , Bonic Zoran
Published: March 2021

Mathematical interpretation of the elastic wave diffraction in circular
cylinder coordinates is in the focus of this paper. Firstly, some of the
most important properties of Bessel functions, pertinent to the elastic wave
scattering problem, have been introduced. Afterwards, basic equations, upon
which the method of wave function expansions is established, are given for
cylindrical coordinates and for plane-wave representation. In addition,
steady-state solutions for the cases of a single cavity and a single tunnel
are presented, with respect to the wave scattering and refraction phenomena,
considering both incident plane harmonic compressional and shear waves. The
last part of the work is dealing with the translational addition theorems
having an important role in the problems of diffraction of waves on a pair
of circular cylinders.
Triangular distribution and PERT method vs. payoff matrix for decision-making support in risk analysis of construction bidding: A case study
Authors: Mirkovic Milan
Published: March 2021

Decision-making in construction bidding represents a complex process due to
the present risk. Risk or uncertainty cannot be ignored and should be
treated as a constituent of decision-making. The paper aims to emphasize the
importance of probability theory by comparing insufficiently applicable
methods in practical bidding. The triangular distribution and the PERT
method belong to three-point estimate techniques, while payoff matrices
represent a multi-criteria approach. Also, selected methods belong to
quantitative techniques for risk cost analysis. Still, the risk costs
determination of the unit costs and the total costs of bids is often based
on an intuitive approach. Therefore, compared results of the triangular
distribution, PERT method, and payoff matrix techniques (minimin, minimax,
expected monetary value, and expected opportunity loss) indicate the
significance of risk costs estimating in tendering. The analysis of the
results showed some overlaps in risk costs values obtained by the PERT
method and expected monetary value technique. Those are due to the
specificity of the chosen practical example and cannot be adopted as a rule.
This means that selected methods and techniques are very useful for all bid
estimation. The paper proved the complexity of decision-making, where the
primary goal is to award a contract.
Application of modern types of steel in construction from the aspect of material properties according to Eurocode 3
Authors: Popa Andreea-Ramona , Toplicic-Curcic Gordana , Zivkovic Srdjan
Published: March 2021

This subject is often discussed by researchers since it is an interesting
topic in terms of the behavior of materials found in a building. Metal in
construction is a point of interest for designers, suppliers, and builders
due to logistical and time management advantages. Based on the researchers'
information mentioned in the references, the project aims to provide details
on the modern techniques for applying steel in construction according to
current standards.
Deformation indeterminacy in global analysis of steel structures with semi-rigid joints
Authors: Zivkovic Srdjan , Spasojevic-Surdilovic Marija , Milosevic Marko , Stojkovic Nenad
Published: March 2021

This paper shows the procedure for determination of deformation indeterminacy
within global analysis of steel constructions with semi-rigid joints, as
well as the analysis of deformation indeterminacy within the approximate
deformation method. In this paper there has been a detailed comparative
analysis with criteria of cinematic system stability and division on steel
frame with semi-rigid connections to systems with movable and immovable
joints.
Evaluation of the constructed 3D models of RNAs: A review
Authors: Arsic Biljana , Furtula Boris , Randjelovic Marjan
Published: March 2021

The development of new experimental techniques, such as cryo-electron
spectroscopy, enables insight into the structural features inside cells.
However, in specific cases, it is still not possible to get the cryo images.
Therefore, the development of the scores for the evaluation of the quality
of the constructed RNAs, similarly to the proteins, is a prerequisite for
the investigation of the diseases caused by the organisms not well
investigated. Here, we are providing a summary of the evaluation scores in
use for the prediction of the quality of the constructed 3D models of the
RNAs.
To the study of hemipteran assemblages (Insecta: Heteroptera) of aquatic and near-aquatic biotopes of the Meshchera National Park
Authors: Lychkovskaya Irina Yu.
Published: March 2021

This paper presents the results of a study of hemipteran assemblages in aquatic and semiaquatic biotopes of the Meshchera National Park. The insect fauna, which includes 80 species of 21 families, includes eurytopic species, polyphytophages, and broad oligophytophages, inhabiting biotopes with an herbaceous cover and a wide range of humidity. The fauna is mainly represented by Trans-Palearctic, Superatlantic and Holarctic species. The greatest faunistic similarity is characteristic of hemipteran associations of floodplain meadows with areas of sedge-forb shores (ICS = 29.1%) and sedge shores (I CS = 21.4%); in addition, the hemipteran assemblages of rivers and ditches are very similar (ICS = 14.8%).
Theoretical study of the model of air flow movement near the shaped shelter of the rough grinding machine
Authors:   Don State Technical University, Rostov-on-Don, Russian Federation, Kuptsova I. S.
Published: March 2021

Introduction. The article deals with the problems of choosing equipment for effective dust removal and subsequent dust collection. The dependences describing the fields of flow velocities in the closed area of the abrasive wheel, influencing the formation of streamlines of flow motion near the shaped shelter of the rough grinding machine, are considered. Problem Statement. The objective of this research is to develop a mathematical and computer model of the aspiration of a rough grinding machine. Theoretical Part. To accomplish the set task, the modern software Аnsys was used as well as the previously obtained results of the dispersion analysis of abrasive-cast iron dust during grinding, which had been carried out using a High-class device — an Analysette22 NanoTec laser granulometer. Conclusion. The results of the analysis, the obtained fields and the values of the air flow velocities in the workplace of the machine operator will be compared with the hovering rates of various dust particles, which will allow us to determine the efficiency of the rough grinding machine shelter, including at the design stage.
Determination of capacity and comfort indicators of a passenger elevator
Authors:   Don State Technical University, Rostov-on-Don, Russian Federation, Apryshkin A. S. , Khazanovich G. S. ,   Don State Technical University, Rostov-on-Don, Russian Federation
Published: March 2021

Introduction. Elevators are mass weight-handling units used by millions of residents of multi-storey buildings. Safety of elevator units and comfort of their use are determined not only by the correct choice of their design and parameters, but first of all, by the organization of the maintenance system. Each elevator is an individual unit that serves a residential building with a specific number of passengers, number of floors and other features. However, regulatory documents recommend standard maintenance plans. There is the need to establish the relationship between the loading modes of the main components and the optimal scheme of technical and repair works. The present work is devoted to the solution of this problem, along with the study of transport comfort. Problem Statement. The operation of the elevator in a residential building with a number of floors N occurs in separate cycles. Standing, lift call, and destination floors are random variables for which probabilistic characteristics must be reliably established. In general, the elevator operation mode includes three stages: calling to the passenger boarding level, moving with passengers to the destination level, and waiting for the next cycle. There are stops inside the movement stages. The specific problem of mathematical description of the random process of implementing the operating characteristics of the main drive of the elevator is reduced to two directions: 1) the development of mathematical models for the formation of the main indicators of the main elevator drive load during the cycle (net machine time τmi and the number of switches n)i; 2) the study of the relationship between passenger traffic, building residential density and cycle duration. Theoretical Part. To meet these objectives the authors have performed the studies of the following main processes characterizing the functioning of the lift, the level of capacity of the transport drive and comfort: the development of mathematical models of formation of indicators of the elevator drive load; the establishment of the relationship of traffic flow, residential density and the duration of the cycle; development of methodology for calculation of the number of flights went by the elevator in different modes; development of methods of calculating the transport comfort indicator; justification of the structure of the algorithm for modeling the operating modes of the elevator. Conclusion. The paper provides the results, which complement the theoretical provisions for determining the capacity and transport comfort of elevators.
Ensuring safety during operation of a loading and unloading railway overpass at an oil depot
Authors:   Ufa State Petroleum Technological University, Ufa, Russian Federation, Fedosov A. V. , Abdrakhmanov N. Kh. ,   Ufa State Petroleum Technological University, Ufa, Russian Federation, Tikhonova A. S. ,   Ufa State Petroleum Technological University, Ufa, Russian Federation, Danieva I. R. ,   Ufa State Petroleum Technological University, Ufa, Russian Federation, Valeeva R. R. ,   Ufa State Petroleum Technological University, Ufa, Russian Federation
Published: March 2021

Introduction. The analysis shows that one of the main causes of accidents at refineries is the low reliability of process equipment and technological discipline violation. Problem Statement. The objective of this research is to study theoretical foundations of loading and unloading railway overpass operation, to identify hazardous factors and to suggest measures to improve safety during operation of this overpass at the oil depot of Bashneft-roznitsa ООО (limited liability company). Theoretical Part. During loading and unloading operations, many accidents occur annually that pose some risk to workers life and health and cause damage to the ecology and economy of the country. The features of the process are: high pressure, high temperature, the use of dangerous and harmful, toxic chemicals that have a harmful effect on humans. Technical causes of accidents are wear and unreliability of equipment, violation of production discipline. However, there are also organizational causes of accidents, such as poorly organized production control, as well as low level of industrial safety competence of employees. Therefore, it is necessary to carry out measures aimed at improving the reliability of the equipment. The study has also revealed that one of the main technical causes of accidents at oil refining enterprises is the low reliability of technological equipment and violations of production discipline. Conclusion. The paper presents the study on operation of the loading-unloading railway overpass at the oil depot of Bashneft-roznitsa ООО (limited liability company). There have been developed and proposed measures to improve safety during operation of the loading-unloading railway overpass at the oil depot of Bashneft-roznitsa ООО (limited liability company).
Improvement of warehouse hovercraft transport devices with inclined feed channels
Authors:   Luhansk State University named after Vladimir Dal, Luhansk, Luhansk People's Republic, Turushin V. A. , Redko A. M. ,   Luhansk State University named after Vladimir Dal, Luhansk, Luhansk People's Republic, Turushina N. V. ,   Luhansk State University named after Vladimir Dal, Luhansk, Luhansk People's Republic
Published: March 2021

Introduction. The paper considers the question of the directions of mechanization and automation of rack warehouses logistics. The paper considers hovercraft transport devices operating in the storage area with inclined feeding channels. The displacement of the load center relative to the geometric center of the support surface is studied. It is noted how this affects the main characteristics of the studied devices. Problem Statement. Previous studies have proved the sufficient performance of non-powered hovercraft transport devices with inclined feed channels, their safety and efficiency in the transportation of piece goods, as well as the potential for mechanization and automation of transport and storage operations in rack warehouses. The task of this work is to present a scheme of mechanization for the storage area of a rack warehouse equipped with a transport device with inclined feeding channels. Theoretical Part. In rack warehouses designed for the storage of individual goods, the receiving, storing and sending operations are in most cases carried out using carrying and lifting machines. Stacker cranes are most common, but their use requires the creation of complex and expensive systems, i.e. significant capital and operating costs. The article considers the system of mechanization of a rack warehouse with the use of hovercraft vehicles with an off-center location of the cargo. In this case, the height of the airbag depends on the eccentricity of the load location. The points of application and the values of the resistance and traction forces, torques and friction forces that affect the total resistance are shown, which are typical for such a situation Conclusion. The results of the research allow us to state that in some cases, instead of traditional transport devices, the use of hovercraft transport devices with the inclined feed channels is effective in logistics enterprises.
The Hidden Shadow of Coronavirus on Education in Developing Countries
Authors: Khlaif Zuheir N , Salha Soheil , Fareed Shahid , Rashed Hadi
Published: March 2021

The aim of this paper is to investigate the challenges associated with emergency remote teaching in the developing countries of Palestine, Libya, and Afghanistan, as reported by middle-school students, their parents, and teachers. These countries have been struggling with an unstable and violent situation for decades. Semi-structured interviews were conducted with 60 participants from the three countries and 60 online classes were observed. Findings revealed that COVID-19 widened the digital gap among students and families, which created challenges in terms of online class attendance. In addition, violation of students’ and parents’ digital privacy emerged as another key challenge to emergency remote teaching. However, teacher presence and timely feedback in synchronous online sessions strengthened students’ engagement within the emergency remote teaching environment. Overall, emergency remote teaching during the COVID-19 crisis deepened inequities across students and infringed upon the digital ethics of students, teachers, and parents.
Preparing Doctoral Students to Teach in an Increasingly Virtual World: A Response to COVID-19 and Beyond
Authors: Bishop-Monroe Robbie , Di Paulo Harrison Brandon , Knight Margaret E. , Corritore Cynthia , Rybarczyk Brian J. , York Anne Stewart
Published: March 2021

The recent global pandemic revealed just how unprepared faculty and doctoral students at many U.S. colleges and universities were to teach online. In this study, we investigate the extent to which current and recently graduated doctoral students are prepared to teach online, how they are rewarded for those online teaching skills, and how they could be more effectively prepared. To answer these questions, we surveyed the beliefs of doctoral students and recently graduated faculty members from a Midwestern private university and a Southeastern state university regarding online teaching preparedness compared with those of faculty, department chairs, and deans. We also used data from a summer teaching pilot program to explore best practices for improving doctoral students’ preparation to teach online. Findings suggest that educating doctoral students to teach in a virtual world can increase students’ confidence and ability to teach in this mode and can be cost effective if offered across disciplines. However, while doctoral students believe that online competency is important in hiring and tenure decisions, deans and department chairs do not necessarily agree, and few schools provide meaningful preparation for online teaching to their doctoral students.
The Forgotten Ones: How Rural Teachers in Mexico are Facing the COVID19 Pandemic
Authors: Padilla Rodriguez Brenda Cecilia , Armellini Alejandro , Traxler John
Published: March 2021

The COVID-19 global pandemic resulted in the cancellation of face-to-face classes in Mexico, as it did across the world. This paper focuses on the experiences of 75 rural teachers in Mexico, who represent a minority in a country where approximately 80% of the population lives in urban areas. An online survey was administered to participants, who taught in a variety of schools, including K-12 and university settings. These participants shared how they changed their teaching practice, the challenges they faced, and the support they required. The digital divide represented a key challenge for both teachers and their students. In the face of inconsistent, unclear, or non-existent government support, most rural teachers showed commitment, resilience, and resourcefulness. They took control of, and responsibility for, their professional development by seeking ways to fill gaps in their knowledge and continue supporting their learners. Recommendations for institutional authorities and policy makers are discussed.
Adapting a Classroom Simulation Experience to an Online Escape Room in Nutrition Education
Authors: Ross Jenifer , Wright Lauri , Arikawa Andrea
Published: March 2021

Due to the COVID-19 emergency transition to remote learning, an undergraduate class in nutrition and dietetics modified a face-to-face experiential “escape room” assignment into a comparable online experience. The online assignment was structured so that students had to use knowledge and clues to move through each step of the Nutrition Care Process; students proceeded through the escape room individually until each successfully “escaped.” An important component of this assignment was the postactivity debriefing process, which took place via video conferencing in small groups. Students indicated that they were pleasantly surprised at the effectiveness of the online assignment. However, analytics showed that students progressed through most of the steps fairly quickly; thus, instructors plan to improve future deployments by using a variety of interactive assessments and adding more layered criteria and clues within each of the escape room steps.