bluuebunny/crossref_metadata_2025 huggingface dataset:
Poa probatovae (Poaceae), a new species from the Eastern Siberia
Authors: Olonova Marina V. , Chepinoga Viktor V.
Published: April 2022

We describe a new species, Poa probatovae Olonova et Chepinoga, which occurs in the conifer forests of Tunkinskiye Goltsy Ridge (East Sayan Mts.) in the south of Republic of Buryatia (Eastern Siberia). Besides the protologue, we indicate the affinity of the new species and its geographical distribution. Assumptions about a possible relationship of P. probatovae are made as well. The new species is close to P. × intricata Wein (P. palustris L. × P. nemoralis L.) and P. remota Forcell but differs well from them by glabrous callus of the lemma, pubescence between the veins of lemma and between keels of palea. The described species is presumably endemic for Tunkinskiye Goltsy Ridge, but it is very likely found on other ridges of East Sayan Mts. and the Khamar-Daban Ridge.
Selaginella submonospora (Selaginellaceae), a new species from Yunnan
Authors: Shalimov Alexander P. , Zhang Xian-Chun
Published: April 2022

Selaginella submonospora is described as a new species from western Yunnan (China) based on morphological and molecular evidence. It is morphologically similar to S. subdiaphana (Wall. ex Hook. et Grev.) Spring, S. monosporaSpring, and S. hezhangensis P. S. Wang et X. Y. Wang. Selaginella submonospora can be distinguished by its leaves with short denticulate-ciliolate margins, dorsal leaves obliquely subcordate at base, short acuminate at apices, and ventral leaf oblique at base. Furthermore, the phylogenetic analysis based on the concatenated chloroplast genes rbcL, atpI, and psbA supported that S. submonospora is a distinct species and closely related to S. monospora.
Rare and endemic plant species of Mountain Crimea flora: a morphogenic response to conservation in the gene bank in vitro
Authors: Ivanova Natalia N. , Tsiupka Valentina A. , Mitrofanova Olga V. , Mitrofanova Irina V.
Published: April 2022

Biotechnological approaches have been actively used in recent years to preserve rare and endemic plant species under slow growth conditions. This is reached by lowering the temperature and light intensity, increasing the osmotic concentration, introducing retardants into the culture medium. For conservation, we used microshoot segments of Lamium glaberrimum (K. Koch) Taliev (Lamiaceae), Crepis purpurea L. (Asteraceae), Scrophularia exilis Popl. (Scrophulariaceae), Silene jailensis N. I. Rubtzov (Caryophyllaceae) cultured under standard in vitro conditions for 8‒10 months. The explants were placed on ¼ MS culture medium supplemented with plant growth inhibitors: 0.2 g/L 2-chloroethyl-trimethyl-ammonium chloride (CCC) and 60 g/L sucrose. Conservation conditions were: the temperature 4–6 °C, light intensity 1.25–3.75 µM m-2 s-1, photoperiod 16 hours. Screening of the morphometric parameters indicated high viability and a decrease in growth kinetics after 12 and 24 months of deposition in the gene bank in vitro. Along with the microshoot slow growth, the formation of adventitious shoots, leaves, and roots was observed.
On the natural interspecific hybrids of Ophrys mammosa Desf. s. l. and O. oestrifera M. Bieb. (Orchidaceae) from the Crimea and the North Caucasus
Authors: Fateryga Valentina V. , Ivanov Sergey P. , Popovich Anton V. , Fateryga Alexander V.
Published: April 2022

Two natural interspecific hybrids of Ophrys mammosa Desf. s. l. and O. oestrifera M. Bieb. (O. × aghemanii Renz) are reported from Russia: a very rare O. mammosa subsp. mammosa × O. oestrifera from the Crimea (vicinity of Zelenogorye) and a relatively abundant O. mammosa subsp. caucasica (Woronow ex Grossh.) Soó × O. oestriferafrom the Krasnodar Territory (vicinity of Bolshoy Utrish). Males of Andrena carantonica Pérez are recorded as efficient pollinators of apparently both O. mammosa subsp. caucasica and O. oestrifera at the site where their hybrids occur.
New findings in the flora of Mongolia. Part 2
Authors: Kechaykin Aleksey A. , Shmakov Alexander I. , Batkin Alexander A. , Gundegmaa Vanzhil , Baasanmunkh Shuhandori , Oyuntsetseg Batlay , Choi Hyuk Jae , Gregor Thomas , Paule Juraj , Shaulo Dmitry N. , Korolyuk Andrey Yu. , Zibseev Andrey G. , Sinitsyna Tatyana A. , Smirnov Sergey V.
Published: April 2022

New data on the distribution of 40 species from the families Asteraceae, Cystopteridaceae, Dryopteridaceae, Euphorbiaceae, Poaceae, Rosaceae, and Woodsiaceae in Mongolia are presented in the article. For the first time, Centaurea cyanus, Cystopteris almaatensis, Potentilla × habievii, Potentilla salsa, and Potentilla smirnovii are indicated for the flora of the country. 19 species previously known in the flora of Mongolia are new for its separate botanical and geographical regions. Of these, 7 taxa were found for the first time in the Khuvsgul, 5 – in the Khovd, 4 – in the Gobi Altai and 3 – in the Mongolian Altai regions, 2 each – in the Khangai, Khentei, and Dzungarian Gobi, 1 – in the Middle Khalkha. New locations were registered for 19 rare and endemic species of the study region. There are narrow local national endemics: Potentilla coriacea, P. inopinata, P. laevipes, and P. schmakovii, among them. The findings are divided into three groups in the article. Comments about the range, relationships and main morphological differences are given for each species. Photographic materials of Potentilla salsa made in nature on the territory of Mongolia are demonstrated for the first time.
Pickle Juice Intervention for Cirrhotic Cramps Reduction: The PICCLES Randomized Controlled Trial
Authors: Tapper Elliot B. , Salim Najat , Baki Jad , Zhao Zhe , Sundaram Vinay , Patwardhan Vilas , Nikirk Samantha J.
Published: April 2022

INTRODUCTION:

Muscle cramps are common among persons with cirrhosis and associated with poor health-related quality of life. Treatment options are limited. We sought to determine whether pickle juice can improve muscle cramp severity.

METHODS:

We enrolled 82 patients with cirrhosis and a history of >4 muscle cramps in the previous month from December 2020 to December 2021. Patients were randomized 1:1 to sips of pickle juice vs tap water at cramp onset. Our primary outcome assessed at 28 days was the change in cramp severity measured by the visual analog scale for cramps (VAS-cramps, scaled 0–10). Cramps were assessed 10 times over 28 days using interactive text messages. Secondary outcomes included the proportion of days with VAS-cramps <5, change in sleep quality, and global health-related quality of life measured using the EQ-5D.

RESULTS:

Overall, 74 patients completed the trial, aged 56.6 ± 11.5 years, 54% male, 41% with ascites, 38% with encephalopathy, and model for end-stage liver disease—sodium score 11.2 ± 4.9. Many patients were receiving other cramp therapies at baseline. The baseline VAS for cramps was 4.2 ± 3.4, the EQ-5D was 0.80 ± 0.10, and 43% rated sleep as poor. At trial completion, the respective values for the pickle juice and control arms were −2.25 ± 3.61 points on the VAS for cramps, compared with control tap water (−0.36 ± 2.87), P = 0.03; a proportion of cramp-days with VAS-cramps <5 were 46% vs 35% (P = 0.2); and the change in sleep quality was not different (P = 0.1). The end-of-trial EQ-5D was 0.78 ± 0.10 vs 0.80 ± 0.10 (P = 0.3). No differences in weight change were observed for those with and without ascites.

DISCUSSION:

In a randomized trial, sips of pickle brine consumed at cramp onset improve cramp severity without adverse events.
3d finite element simulation of reinforced concrete column strengthened by partially confined carbon fibre reinforced polymer under concentric loading
Authors: Ahmad Zakwan Fariz Aswan , Ismail Ruqayyah , Ahmad Hazrina , Muhammad Rashid Raizal Saifulnaz
Published: April 2022

In this paper, numerical simulation initiated to investigate the mechanical response of reinforced concrete (RC) column strengthened by partially confined carbon fiber reinforced polymer (CFRP). An experimental investigation of the circular hollow unconfined and confined RC column enhances with a partially CFRP sheet has been performed to investigate its behavior under concentric loading on top of the RC column. From the experimental data, the critical buckling failure of the RC column observed. Therefore, the prediction behavior of the RC column strengthened with partially confined CFRP under concentric loading was made with the application of the general-purpose of ABAQUS finite element simulation. From the outcome of the simulation results, the predicted buckling failure compared and validated against the experimental data. The predicted model discovered to agrees well with the experimental work output.
Effect of TiO2 and ZnO powder mixtures on mechanical and photocatalytic performance of high performance concrete
Authors: Amor Fouad , Ingrišová Lenka , Rácová Zuzana , Baudys Michal , Hájek Petr
Published: April 2022

The development of new modified cement-based materials is increasingly becoming a necessity for improving the durability and surface performance of building materials. Titanium dioxide (TiO2) photocatalyst has been widely used in building materials science due to its ability to break down pollutants. Zinc oxide (ZnO) is often considered a substituent for TiO2 because of its photocatalytic and photoluminescent properties. A new inorganic nanocomposite photocatalyst, based on titanium and zinc oxides, is introduced in this work in order to study its compatibility with High Performance Concrete (HPC). This research aims to study the mechanical and photocatalytic behavior of mixtures based on nanoparticles in HPC. The study of the efficiency in the nitrogen oxides (NOx) degradation of modified HPC in TiO2 and ZnO with different percentages is studied. The studies have shown that the introduction of titanium dioxide in HPC presents a significant efficiency for the NOx degradation and a positive effect on the mechanical properties than zinc oxide, and thus represents potential contribution to sustainability of concrete structures.
Conformity assessment model for mechanical coupling devices and anchors for reinforcing steel for use in concrete structure
Authors: Brankley Lee , Turgul Ayhan , Morgan Lyn , Camci Ladin
Published: April 2022

The use of mechanical coupling devices and anchors for reinforcing steel for use in concrete structures can simplify the design and construction of reinforced concrete and reduce the amount of reinforcement required. Technical Approvals of these products by suitably qualified organisations are acceptable under Building Regulations and by major specifiers as the appropriate way of assessing non-standard or new and innovative products. Specifiers, manufacturers, traders, and customers increasingly demand certainty in the quality management of mechanical coupling devices and anchors entering the supply chain. The supply chain is extremely complex. The weak traceability systems and pressure on the supply chain to reduce cost have created the environment where risks increase. This unique and comprehensive model describes the technical and assessment requirements for the conformity of mechanical coupling devices and anchors. It covers all stages in the supply chain from the production, assembly, product performance and evaluation of mechanical properties including tensile strength, ductility, permanent elongation (slip), cyclic loading performance and fatigue performance. The essential elements of the quality management system combined with additional requirements on process control, product testing and robust installation methodology are essential and agreed by all relevant sectors of industry.
Sustainability of concrete pavements considering traffic and de-icing agents
Authors: Breitenbücher Rolf , Przondziono Robin
Published: April 2022

In concrete pavements, special conditions, that increase the likeliness of damaging reactions, as for example an alkali-silica reaction (ASR), prevail. Especially to the superposition of microstructural degradation caused by cyclic loading with an external alkali supply can influence the sustainability negatively. Concrete pavements are subjected to cyclic loadings by traffic and climate changes. These cause microcracks (about 5 μm) within the concrete matrix during service. Additionally, an ASR in pavements is promoted by externally supplied alkalis (de-icing agents). By superposition of both effects the alkali capacity close to the ASR-reactive aggregate aggregate is increased substantially as the externally supplied alkalis can easily penetrate through the microcracks. Thus, both effects intensify the ASR in concrete pavements. Within cooperative research projects the different interdependent influencing factors for a damaging ASR in concrete pavements are studied by experiments as well as by numeric modelling. On the micro-level the ASR-related processes within the aggregate, such as gel-formation or ion-transport, are investigated. On the meso-level, the project focuses on the characterization of degradation effects in the concrete microstructure due to cyclic loading. Further, special attention is paid to the transport behavior of fluids in such pre-damaged concrete structures. A significant increase of the penetration depth of alkaline solutions could not only be observed at different stages of progressing degradation. It becomes also obvious that the ingress of externally supplied alkalis is enhanced by the overrunning traffic. Finally, on the macro-level, the risk of an ASR-damage is assessed.
Long span post-tensioned box girder bridge in Bratislava
Authors: Chalupec Adrián , Ondroš Martin , Novotný Petr
Published: April 2022

The paper describes an analysis and detailed design of the 470 m long D4 motorway bridge in the Slovak capital Bratislava. This bridge is a part of 2 932.50 m long D4 motorway crossing of the Danube River and its surrounding areas. The 210 m long main span of the post-tensioned three span box girder bridge is the longest span which has ever been built in Slovakia. The Ministry of Transportation and Construction of the Slovak Republic requirement was to cross all future rowing tracks by a single span. The depth of the cross section varies from 4.39 m at span to 13.09 m at piers. 35 m wide cross section carries 4-lane carriageway, median, sidewalk and cycling path. The central part of carriageway is built by the balanced cantilever method. The overhangs carrying outer lanes are built by wing traveller machine and supported by the precast struts. The bridge is currently under construction as a part of PPP project of Bratislava ring road (the motorway D4 Bratislava, Jarovce - Bratislava, Ivanka north section).
The role of conceptualization in the evaluation of sustainable concrete
Authors: Henry Michael , Opon Joel
Published: April 2022

Improvement of the sustainability of concrete materials will be realized through the development of analytical tools that facilitate sustainable design and evaluation. However, these processes may be dependent on how sustainability is conceptualized for concrete. Conceptualization is the means by which sustainability is operationalized by creating a structure that connects a qualitative goal to its quantitative indicators. As there exists no established definition of sustainability for the concrete field, conceptualization is a source of uncertainty in the sustainability evaluation of concrete. This paper explores the role conceptualization plays in the evaluation of concrete material sustainability by analyzing its effects using multicriteria analysis and a sustainability indicator framework to quantify sustainability for concrete materials. Six analytical scenarios are explored using frameworks based on direct loading, the three pillars of sustainability, and the Sustainable Development Goals, together with two aggregation methods. It was found that the most sustainable concrete mix varied by scenario, but one concrete mix combining blast furnace slag and high grade recycled aggregates could be judged as the most sustainable due to its highest mean score and lowest variance across all analytical scenarios, which suggests it as the mix least sensitive to methodological choices on conceptualization and aggregation. Overall, however, the sustainability scores were highly correlated between the different scenarios.
Axial behaviour of strengthened circular hollow reinforced concrete column with CFRP partial confinement
Authors: Ismail Ruqayyah , Muhammad Rashid Raizal Saifulnaz , Ahmad Zakwan Fariz Aswan , Ahmad Hazrina , Hejazi Farzad
Published: April 2022

Circular hollow reinforced concrete column will experience deterioration due to many causes such as natural disaster, corrosion, low quality and others. Therefore, structural strengthening is required since replacing the deteriorated column is costly. Carbon fibre reinforced polymer (CFRP) confinement is one of the common method used for column strengthening. However, being a non- biodegradable material, the usage of CFRP will contribute to environmental issues. Therefore, this study investigates the effect of using partial CFRP confinement in a strengthened circular hollow reinforced concrete column. Six specimens of 2 m height with 250 mm and 110 mm for outer and inner diameter were tested. The effectiveness of partial CFRP confinement is analyzed by investigating the tested specimens’ axial and transverse displacement and strain behaviour. This study has shown that with CFRP partial confinement the strength is increased up to 44% from the unconfined circular hollow reinforced concrete column. The results of the study showed that, circular hollow reinforced concrete column with CFRP partial confinement able to enhanced the column load carrying capacity.
A study on properties of concrete with dry fly ash and fly ash slurry stored with stirring
Authors: Ji Xiangnan , Takasu Koji , Koyamada Hidehiro , Suyama Hiroki
Published: April 2022

In the evaluation of concrete sustainability, what constitutes "sustainable" to one region may vary from another. This often leads to methodological forms of uncertainties that makes the evaluation process more complex. As such, this paper aims to quantify the effect of uncertainties in the regional context on the sustainability evaluation of concrete materials. This is carried out by quantifying the regional context through establishing a weighting scheme and then integrating the obtained weights into the sustainability analysis of concrete materials in tandem with uncertainty analysis. Japan is used as a case study because although it relatively appears as a homogeneous country, its prefectures possess unique characteristics that may make the sustainability evaluation of concrete materials vary across prefectures. Cluster analysis is carried out in the 47 prefectures of Japan using a set of regional context indicators. Five clusters are identified with varying characteristics and these are translated into different weighting schemes. The established weights are used in the sustainability evaluation of concrete materials using multi-criteria decision-making analysis. The results showed that one mix is the most sustainable for four of the clusters and a different mix is the most sustainable for the remaining cluster. When uncertainty analysis is conducted, the effect of the weights in the sustainability evaluation is explained by examining the average scores of the concrete mixes and the variance of the scores across the five clusters. This investigation facilitated the understanding of how regional differences and the uncertainties associated with it impact the evaluation of concrete sustainability.
Lower bound analysis for shear assessment of full-scale RC girders subjected to axial tension
Authors: Kanazawa Takeru
Published: April 2022

Axial tension force exerted as a result of a temperature change or shrinkage can cause the collapse of RC structural members. Design code provisions and analytical models such as Modified Compression Field Theory (MCFT) yield reasonable estimates of shear strength of RC beams subjected to axial tension. Nevertheless, their semi-empirical nature is not necessarily appropriate for shear assessment of existing RC structural members. The extra conservativeness and empirically determined parameters might require unnecessary maintenance work. A generalised model with rigorous formulation must be developed. This paper presents a purely theoretical model to predict the shear strength of RC beams under axial tension based on limit analysis. Without regressive functions and empirical functions, lower bound analysis enables shear strength derivation when the force equilibrium and strain compatibility are satisfied. Accuracy of the analysis was verified by comparison of its predictions with three experimental shear strengths of full-scale RC girders. An equal level of accuracy was observed betweenthe analytical solutions and MCFT-based predictions.
Innovative strengthening of RC columns using a layer of a fibre reinforced concrete
Authors: Koteš Peter , Vavruš Martin , Raczkiewicz Wioletta
Published: April 2022

Reinforced concrete structures that are influenced by degradation, overloading, the thawing and freezing cycles, abrasive damage and corrosion of reinforcement, should be repaired or strengthened. Each of those mentioned situations lead to decreasing the load-carrying capacity of the construction. The damage of a structure or its member causes exceeding the serviceability limit states and ultimate limit states. For this reason, for further use of the structures, they have to be strengthened to increase the load-carrying capacity and to extend the remaining lifetime. A new method for strengthening the vertical members, e.g., columns, is using the fibre reinforced concrete layer and its increased tensile strength in comparison to common RC concrete. This article deals with the theoretical design of dimensioning the columns using a layer of fibre concrete around a column (wrapping). In this case, it is necessary to calculate the residual strength of fibre concrete, which is a crucial factor for the tensile strength of the element.
Railway reinforced concrete infrastructure life management and sustainability index
Authors: Lajevardi Seyed Mohammad Sadegh , Lourenço Paulo B. , Sousa Hélder S. , Matos José C.
Published: April 2022

Infrastructure healthy enhancement for saving resources in operation procedures is one of the most important objectives for owners on their decision support system based on cost management. In this manner, finding the intervention action priority, as well as the inspection method and maintenance system for each component, with regard to a limited resources amount is investigated in this paper. Defects on infrastructure components create data and these data are undoubtedly useful to increase the knowledge in decision making in practice. In that sense, risk analysis and value of information can be applied using decision trees together with Bayesian networks. For data filtering and noise reduction, a principal component analysis may also be applied to manage a database and prepare useful input variables for the decision tree system. This paper presented an approach for the maintenance managers to prepare their infrastructure available with a sustainable index with minimum cost. This index would be a tool for decision-makers with regard to the cost management and sustainability aspects.
Enhanced service life of existing infrastructure buildings by use of concrete screw anchors as post-installed shear reinforcement
Authors: Lechner Johannes , Feix Jürgen
Published: April 2022

In the last decades, traffic on railways and roads has increased significantly in Central Europe. On the other hand, the existing infrastructure mainly origins from the late 1950s to the 1970s. This applies also for the existing bridge and tunnel infrastructure which is now up to 60 years old. Due to this age and new standards in the current codes, quite often the amount of shear reinforcement does not fulfil the current design code rules. As a replacement of existing structures is often highly unsustainable, methods to improve the shear strength are needed. Therefore, a new system for post-installed shear reinforcement by the use of concrete screws was developed at the University of Innsbruck in the last years. The idea is to use concrete screw anchors - already known as anchoring element - aspost-installed reinforcement. In over 60 shear tests with girders and slabs the excellent applicability  of concrete screw anchors as post-installed shear reinforcement has been proven. Also shear tests with cyclic loading were performed prove the use for dynamically loaded structures, such as bridges. Based on these test results a design approach was determined to meet the Eurocode-2 assessment standards.Several pilot-projects with concrete screws have been realised in Austria and Germany. For example a rail-road-bridge over a German highway with a remaining service life of zero years was strengthened to a new service life of over 20 years. Also a city-centre tunnel in Munich which was erected below a historic building is currently strengthened under ongoing traffic in the tunnel using concrete screw anchors as post-installed reinforcement.
Experimental investigation on the mechanical behaviour of AAC blocks for sustainable concrete masonry
Authors: Michelini Elena , Ferretti Daniele , Sirico Alice , Cerioni Roberto
Published: April 2022

To satisfy the increasing demand of energy efficient buildings, AAC manufacturers are nowadays encouraged to produce blocks with ever lower densities. However, a compromise between energy-saving requirements and mechanical performances is needed to ensure structural safety, as well as an adequate structural durability. This paper reports a comprehensive experimental study on AAC mechanical properties (compressive and tensile strengths, as well as fracture energy), and on their dependency from material density and moisture content. The collected data are compared with some well-known analytical relations taken from the literature, which are often used for the calibration of mechanical parameters required for mathematical and/or finite element modelling of AAC load-bearing masonry, as well as of AAC masonry-infilled framed structures. These comparisons highlight some critical issues in the formulation of analytical relations having a general applicability; however, it was found that RILEM suggestions are appropriate for the considered AAC productions, at least for densities greater than 400 kg/m3.
Dowels effectiveness investigation between ultra high performance fiber reinforced concrete and reinforced concrete
Authors: Paschalis Spyridon A. , Lampropoulos Andreas P.
Published: April 2022

In the present study, the performance of Reinforced Concrete (RC) beams which were strengthened with Ultra High Performance Fiber Reinforced Concrete (UHPFRC) and dowels at the interface was investigated. RC beams with a length of 2.2 m strengthened with UHPFRC layers at the tensile side. Before the application of the layers, the interface between RC and UHPFRC was roughened. During the testing, the interface slips between UHPFRC and RC were recorded using Linear Variable Differential Transformers (LVDTs). The beams were tested under four-point flexural test. The results of the present study indicated that the dowels at the interface reduce the slips at the interface, delay the formation of cracks and result in higher load carrying capacity.
Parapet structure from special shaped TRC blocks
Authors: Pazderka Jiří , Hájek Petr , Nývlt Michal , Žáková Hana
Published: April 2022

The paper describes innovative parapet solution based on special shaped blocks made form textile-reinforced concrete - TRC. The blocks are designed for a placement at the parapet of building with a flat roof. The solution is appropriate for buildings with precast-concrete bearing structure by following the principle of precast technology (short construction time, minimal technological pauses). However, presented parapet TRC blocks can be used for energy efficient buildings as well in combination with thick layers of thermal insulation. The technical solution was registered as utility model no. CZ27642(U1).
Load transfer mechanism of concrete screws
Authors: Stocker Florian , Zeman Oliver , Schwenn Michael , Bergmeister Konrad
Published: April 2022

Even though the market and development for concrete screws has been increasingly rising in recent years, the load transfer mechanism of concrete screws has not yet been fully investigated. Therefore, different tests of concrete screws made of galvanized and stainless steel were performed in concrete C20/25 and C50/60. The main aim is to measure the strain along the embedment depth. This will be achieved by using strain gauges that get placed in a centrically drilled borehole through the concrete screw. To get a comparison to the mechanism of the screws the same process will be executed in threaded rods used as a part of bonded anchors. Due to the fact that the threaded cuts of concrete screws have geometrical similarities to bonded anchors, it was examined if the load transfer of both fasteners is related and may be compared. The results of the testing have shown that the load transfer mechanism of both fastener types is similar in low-strength concrete showing a concrete cone failure. In high strength concrete due to the mainly occurring steel failure the maximum measured strains at the maximum load step are not comparable. However, at lower load steps where the steel does not exceed the yield strength the results show a similar load transfer mechanism, too.
Use of recycled concrete fines in cement and as aggregate
Authors: Stuerwald Simone , Meglin Ronny , Kytzia Susanne , Gilg Sabrina
Published: April 2022

The research project focused on investigating and optimizing the processing and use of recycled crushed sand 0/4 from concrete demolition waste, as an alternative raw material in the cement and concrete industry. Crushed sand is produced during the processing of concrete demolition waste. The goal was to identify the optimum way of using the processed material along the entire process chain so that greenhouse gas emissions, waste volumes are reduced, and natural resources are conserved. Different samples of laboratory and real crushed concrete fines were collected and examined in relation to various possible applications in accordance with the applicable standards. Results highlight, that crushed concrete fines can be used in various applications in the concrete value-chain. However, for an optimal usage, additional processing is needed.
Breakthrough of the resemblances and correspondences between resilience and sustainability in civil infrastructures
Authors: Urbina Oscar Javier , Teixeira Elisabete , Sousa Hélder , Matos José
Published: April 2022

Sustainable construction has become a growing trend among researchers and stakeholders. Simultaneously, resilience and risk assessments for civil Infrastructures have flourished in terms of importance among researchers, economic sectors, and society. Nevertheless, there is no abundant research that correspond to both approaches, despite that, there are massive similarities and shared characteristics between both investigation branches. Distinctively, this year has demonstrated that sustainable development is directly obstructed by different extreme events that trigger risks and vulnerabilities in civil Infrastructures. These extreme events require a deep and complex study to minimize the impacts they may cause in society and economy, two main factors considered in the study of sustainability. Therefore, when a risk and resilience assessments are conducted, it is already analyzed as a sizable part of sustainability. Consequently, there exists a possibility to create a methodology that examines and assesses four categories of civil infrastructure sustainability: Technical, environmental, social, and economical. The aim of this paper is to demonstrate the need of a comprehensive approach between sustainability, risk, and resilience assessment, compiling and comparing the existing methodologies for assessing the impacts on civil infrastructures, showing that both present resemblances and none can be omitted, being necessary for the decision-making.
Cortes orçamentários na educação: uma ameaça à expansão e consolidação da Rede Federal de Educação Profissional e Tecnológica
Authors: Silvestre Ana Lúcia , Ávila Fábio Geraldo de , Santos Flávio Oliveira , Pereira Camila Claudiano Quina
Published: April 2022

O artigo analisa os efeitos dos cortes orçamentários na educação para a expansão e a consolidação da Rede Federal de Educação Profissional e Tecnológica, trazendo uma discussão acerca dos retrocessos que emergem a partir da agenda neoliberal implementada nos últimos anos. A pesquisa foi realizada por meio de revisão bibliográfica e análise documental de dados secundários do orçamento público para as instituições que compõem a Rede Federal, além de notícias que tratam do assunto. Pôde-se constatar uma ruptura na consolidação das políticas para a educação profissional implementadas até então, e que os cortes realizados são motivos de preocupação tendo em vista que o “produto” destas instituições será responsável pela continuidade da maquinaria social.
A regulamentação do Ensino Domiciliar (homeschooling) no Brasil e a racionalidade neoliberal
Authors: Vinagre Talita Alcalá , Tótora Silvana Maria Corrêa
Published: April 2022

Objetiva-se mostrar os efeitos ético-políticos do discurso presente nos Projetos de Lei que preveem a regulamentação do Ensino Domiciliar no Brasil. E como este processo está diretamente relacionado a uma flexibilização da escolarização pública que irá configurar um ajustamento à racionalidade neoliberal. Com referência nos estudos de Michel Foucault e Sylvio Gadelha, propõe-se problematizar as concepções de educação que estão em questão nesse processo de regulamentação do Ensino Domiciliar. Buscaremos mostrar como essa modulação está diretamente atrelada à propagação de uma cultura empreendedora no campo educacional e favorece a difusão de uma ideia de liberdade individual que prescinde de valores como a solidariedade e a cooperação, em consonância com a dimensão pública de toda educação.
Effect of Ethical Leadership and Motivation on Pro-Environmental Behaviors: Evidence from Thai Automobile Industry
Authors: Sihabudin Sihabudin
Published: April 2022

Despite extensive research on corporate sustainability, little is known about the factors that may instill employees taking part in sustainability initiatives. To address this gap, the main objective of this study is to identify factors that can enhance employees' pro-environmental behaviors that enable them to participate in sustainability initiatives. This study posits that leadership and motivation may influence employees to develop their pro-environmental behaviors through motivation. In order to test the hypothesis of the study, the partial least squareâ€“structural equation modeling (PLS-SEM) approach was used to examine data of 169 employees of the Thai automobile industry. The results show that ethical leadership significantly predicts employees' pro-environmental behaviors. In addition, employees' intrinsic motivation serves as a mechanism by partially mediating the relationship between ethical leadership and employees' pro-environmental behaviors. The study also investigates the relationship between extrinsic motivation with basic pro-environmental behaviors of employees, but no empirical support was found in this regard. This study recommends that organizations encourage employee intrinsic motivation to enhance their pro-environmental behaviors and focus on increasing their performance.
Gravitational Perturbation Influence on High Altitude Satellite for different Inclination
Authors: Kareem Mustafa Najat , Zaki Wafaa Hasan Ali
Published: April 2022

Satellites have become such a vital part of our daily lives that we take for granted many of their functions, such as global positioning system (GPS) navigation and images of weather systems collected from orbit. In this work, The analytical method for third body perturbation on high Earth orbit satellites was investigated in this study for different inclinations (𝑖 = 1.71, 𝑖 = 5, 𝑖 = 10, 𝑖 = 23, 𝑖 = 25) across two revolution periods computed for short and long periods, Using the program celestial mechanics version 1 module (Beutler 2005) with input data given by the Two-Line Elements (TLE) created at the University of Bern's Institute of Astronomy. To determine the third body perturbation on Earth satellite using the collocation method. By analyzing the variation in the orbital elements, geocentric Coordinates and acceleration components by Matlab 2018, There was no discernible change in the coordinate system or acceleration components, which appeared to be secular in both results, change, and effect of perturbation has greatest point at Geocentric equatorial coordinates combinations. The conclusion indicates that the Moon perturbation has the most significant impact on orbital elements; furthermore, the satellite with increasing altitude has increasing the amount of perturbation.
Cardiovascular and Cytogenetics Complications of Obesity Induced by Monosodium Glutamate in New Born Male Albino Rats
Authors: Al-Ani Muhammed M. , Hasan Huda F.
Published: April 2022

The present study was aimed to estimate cardiovascular and cytogenetic changes on rats induced obesity by monosodium glutamate (MSG). The study was performed on 90 newborn male rats which divided into 2 groups, the 1st group were treated with MSG at dose 4 mg/g IP once daily for 4 consecutive days, while as 2nd group served as control (Placebo). After 4 weeks from the first injection, five male rats were taken randomly from each group and the Body Weight (BW), Body Mass Index (BMI), leptin (LEP), Triglycerides (TG), Troponin-I (cTnI), cytogenetic study, myocardial fibrosis ratio and obese gene expression have been measured. All results revealed a significant increase in mean value (P<0.05) in treated group when compared with control group. While a results of myocardial fibrosis ratio photomicrograph showed myocardial interstitial fibrosis, collagen bundles and necrosis of myocytes forming a spaces in cardiac parenchyma. This study concluded the MSG have ability to induce obesity and its complications in rats by causing increasing of obese gene expression in adipose tissue, leptin resistance, in addition to increasing of BW, BMI and serum triglycerides levels, as well as increasing of serum Troponin-l, cardiac damage and inducing of different cytogenetic damage.
Comparative Analysis of Hemodynamic and Electrophysiological Parameters against the Background of Complex Treatment of Glaucomatous Optic Neuropathy with Endonasal Electrophoresis in Combination with Electrical Stimulation
Authors: Saidov Temur T. , Nazarova Janna A. , Abdujamilova Rano M.
Published: April 2022

This article discusses a comparative analysis of hemodynamic and electrophysiological parameters in the context of complex treatment of glaucomatous optic neuropathy with electrical stimulation with endonasal electrophoresis. All this justifies the need for new approaches in the treatment of glaucoma and the great clinical significance of neuroprotective therapy (Russ Herman, 2010; Shepard Allan R. et al., 2010).
Projevy dívek s ADHD ve školním prostředí – přehledová studie
Authors: Kolečková Tereza
Published: April 2022

The aim of this review study is to introduce the topic of girls with ADHD in the school environment. Manifestations of ADHD in girls are more difficult to recognize than in boys with ADHD. Because of that, the educators often do not recognize them and then ADHD in girls if often not diagnosed. This results in further associated difficulties, especially of an emotional and social nature. The article describes the typical manifestations of ADHD in girls and focuses on gender differences and important studies focusing on the school environment. At the beginning of the article, the incidence of ADHD in girls is compared to boys and the definition of ADHD is mentioned. The main part tries to describe the important manifestations of ADHD in girls, which can be useful to both educators and other professionals in recognizing this diagnosis in girls. The second part briefly presents selected studies related to the school environment. This part can also be a valuable benefit for pedagogical workers. At the end of the article, the findings are compared with current research and definitions, which can help better understand and detect the manifestations of ADHD in girls.
Výuka ekumeniky v rámci praktické teologie na pražské evangelické fakultě. Odkaz Josefa Smolíka a Pavla Filipiho
Authors: Vaňáč Martin
Published: April 2022

Teaching ecumenics within practical theology at the Prague protestant faculty: The legacy of Pavel Filipi and Josef Smolík The article deals with the development of teaching about ecumenical issues at the Protestant Theological Faculty of Charles University in Prague since its foundation in 1919 and its gradual linking with the teaching of practical theology. This connection is largely a legacy of two faculty professors of practical theology, Josef Smolík (1922–2009) and Pavel Filipi (1936–2015).
Teologická antropologie v době biotechnologického boomu
Authors: Gallus Petr
Published: April 2022

Human 2.0? Theological anthropology in the times of bio-technological boom The ques-tion of human being is inevitable, yet the answer was and is always particular. Beyond that, the problem of the dominating concept of human being – the bio-technological concept, which has its roots in anthropological optimism of the Enlightenment era and which poses human being close to the model of hi-tech computers as a combination of hardware (physical body), software (mind) and wet-ware (brain) and which, at least in the transhumanist line of thought, aims to overcoming of current humanity toward a human 2.0 – is that it is anthropologically reductive. Theological anthropology reminds here of the constitutive vertical dimension of human being and, against the bio-technological concept of humans, it puts the concept of human being in 3D: in the triple irreducible relations to God, others and oneself, which are constituted in God’s relation to humans (infinitum capax finiti). The bio-technological dimension of our existence thus can help a lot, but it cannot be the dominating model. It cannot overshadow the basic theological purpose of human being: to be the place of God’s presence for others.
Bow structure damage analysis for hybrid coir-glass fiber composite fishing boat hull subjected to front collision load
Authors: Windyandari Aulia , Kurdi Ojo , Sulardjaka  , Tauviqirrahman Mohammad
Published: April 2022

Hybridization of natural and synthetic fibers has the ability to improve composite performance. It means that the combination of natural fibers such as coir, jute, bamboo, and sisal with synthetic or glass fiber can broaden the role of the composite material, especially for structural application. This study developed a finite element simulation to investigate the damage to the bow structure of the fishing boat hull, which was produced using hybrid coir-glass fiber composite (HCGFRP) material subjected to front collision load. The experimental measurement was conducted to determine the mechanical properties of four hybrid composite laminates defined based on the differences in their layers number, fiber types, and orientation angle. Moreover, a numerical simulation model was applied to the traditional fishing boat colliding with fishery harbor quay, and the scenario was defined by varying the boat speed and the types of laminates adopted on the hull structure. The results showed the damage level for the bow structure of the HCGFRP boat due to the collision accidents, while the numerical findings are expected to be used as the basic knowledge in applying the hybrid coir-glass fiber laminates composite as an alternative hull construction material.
Effect of the selected parameters in idealizing material failures under tensile loads: Benchmarks for damage analysis on thin-walled structures
Authors: Prabowo Aditya Rio , Ridwan Ridwan , Tuswan Tuswan , Sohn Jung Min , Surojo Eko , Imaduddin Fitrian
Published: April 2022

The development of the global economy has led to a rise in ship traffic. As a result, the risk of accidents, such as collisions between ships and grounding, has also increased. Different failure criteria to capture these accidents have been introduced by researchers. Therefore, the purpose of this study was to determine the essential distinction between these failure criteria. The simulations suggest that failure criteria based on the maximum stress result in a slightly higher rupture strain value, greater crack propagation, and higher internal energy than those based on the maximum strain. Furthermore, using a larger mesh size compared with the size of the test specimen appears to greatly affect the validity of the simulation results.
A pause in pediatrics: implementation of a pediatric diagnostic time-out
Authors: Yale Sarah C. , Cohen Susan S. , Kliegman Robert M. , Bordini Brett J.
Published: April 2022

Objectives

Diagnostic errors are frequently the product of cognitive biases that arise when heuristic-based approaches fail. The efficiency-thoroughness tradeoff (ETTO) principle states sacrificing thoroughness for efficiency is normal and occurs frequently in medicine. The goal of a diagnostic timeout was to provide an actionable template for when providers transition to an analytical mindset and to help incorporate the ETTO principle during the diagnostic process.

Methods

A diagnostic time-out was adapted for use in pediatric hospital medicine (PHM). In this prospective study, a group of eight PHM providers piloted the time-out in the hospitalized setting. Data was collected over 12 months and descriptive statistics were used for analysis.

Results

Cases were most frequently chosen for time-out use due to clinician intuition. In more than half the cases the time-out didn’t confirm the initial diagnosis and alternate diagnoses for the wrong diagnosis were pursued. There was only one case of the time-out being burdensome from a time perspective. Learners participated in all cases. As a result of the diagnostic time-out, new actions were taken in all cases.

Conclusions

Implementation of a diagnostic time out provides an actionable template for providers to actively change their mindset to an analytical thinking process to counteract cognitive biases and potentially reduce diagnostic errors in the pediatric inpatient setting.
Personal Learning Environments in Online and Face-to-Face Contexts in Mexican Higher Education
Authors: Ramírez-Mera Urith N. , Tur Gemma , Marin Victoria I.
Published: April 2022

With the introduction of digital technologies in education and the diversification of learning modalities, research has sought to identify the characteristics of each modality in order to develop successful learning. The Personal Learning Environment (PLE) is a developing concept that takes advantage of digital technologies and their implications in different modalities. This research aims to identify how the educational modality contributes to the development of PLEs in higher education. We compared two case studies in online and face-to-face contexts in Mexican higher education through a case survey methodology using a questionnaire and a descriptive statistical analysis of five categories: self-perception, management of information, management of the learning process, communication and learning experience. Results show that online students focus on the use of information management skills and on self-regulation of the learning process, whereas face-to-face students are oriented towards the use of communication skills. In conclusion, we identify two PLE profiles whose main differences arise from the students’ learning approaches, one based on social interaction and the other guided by learning aims, two aspects that may contribute to the development of learning strategies for transition between modalities. Finally, we contribute to the support of face-to-face learning in virtual environments and emergency remote teaching.