bluuebunny/crossref_metadata_2025 huggingface dataset:
Status of School of Health Students’ Social Media / Internet Usage and Related Factors
Authors: BAYRAM DEĞER Vasfiye , ÇİFÇİ Sema
Published: March 2021

Aim: Uncontrolled social media/Internet use resulted in digital addiction phenomenon. Aim of this study is to determine the relationship between social media/internet usage, associated factors and socio-demographic variables. Material and Methods: Study universe consisted of all students of a School of Health. The data were collected through a questionnaire and evaluated by statistical package program, whereby p<0.05 was considered statistically significant. Results: 79.4% of the students were female while 20.6% were male. Students who consider that they have internet addiction have a rate of 56.6% and rate of using social networks is 77.7%. 34.1% of the students stated that what comes about social media in the first place is sharing and 49.9% stated that they mostly shared photographs. 78.8% of the students stated that they neglect their jobs due to social media usage and 72.9% that their social or school performance was affected by their school or work performances. Gender, department, marital status, availability of internet connection at home, daily internet and social media usage time were found to be statistically significant. Conclusion and Suggestions: Social media/internet use is common among university students. Consideration should be given to the factors that trigger the use of internet/social media and to identify preventive factors.
Synthesis of 3,4,5-Trisubstituted Isoxazoles in Water via a [3+2]-Cycloaddition of Nitrile Oxides and 1,3-Diketones, β-Ketoesters, or β-Ketoamides: Base-mediated and Keto-enol-controlled Mechanism
Authors: Hossain Md Imran , Khan Md Imdadul H. , Kim Seong Jong , Le Hoang V.
Published: March 2021

A selective [3+2]-cycloaddition reaction of nitrile oxides and 1,3-diketones, β-ketoesters, or β-ketoamides in water without the need of a metal catalyst is described. The selectivity of the reaction can be controlled by the polarity of solvents in the presence of an appropriate base. The optimized reaction condition circumvents other reactions, such as O-imidoylation or hetero [3+2]-cycloaddition. The reaction happens fast in water to provide an environment friendly access to 3,4,5-trisubstituted isoxazoles, specifically acyl-substituted, ester-substituted, or amide-substituted isoxazoles, which are important structures found in numerous bioactive natural products and pharmaceuticals.
Aggregation-Induced Emission: A Challenge for Computational Chemistry. the Example of TPA-BMO.
Authors: de Thieulloy Laure , Le Bras Laura , Zumer Benoît , Lemarchand Claire , Pineau Nicolas , Adamo Carlo , Perrier Aurélie
Published: March 2021

A multi-scale and multi-environment computational approach is proposed to study of the modulation of the emission behavior of the triphenylamine (Z)-4-benzylidene-2-methyloxazol-5(4H)-one (TPA-BMO) molecule [Tang et al., J. Phys. Chem. C,119, 21875 (2015)]. Going from (TD-)DFT calculations to classical Molecular Dynamics simulations through the hybrid ONIOM QM/QM’ approach and the in situ chemical polymerization methodology, we have rationalized distinct photophysical phenomena: (1) in low-polar solvents, a polarity-dependent solvatochromic effect as well as a modulation of the emission quantum yield, attributed to possible photophysical energy dissipation caused by low-frequency vibrational modes, (2) in the aggregate, a subtle competition between an excitonic coupling and a restriction of the intramolecular vibrations leading to an Aggregation-Induced Emission behavior, and (3) in the polymer matrix, an antagonist effect between the loss of global flexibility and the presence of vibrational modes similar to those observed in solution, explaining a similar emissive behavior within the polymer.
Mechanical Bending and Modulation of Photoactuation Properties in a One-Dimensional Pb(II) Coordination Polymer
Authors: Rath Bibhuti Bhusan , Vittal Jagadese J.
Published: March 2021

With emergent research on stimuli responsive materials, dynamic crystals are at the forefront of investigation. However, research on the mechanical properties of coordination polymers (CPs) is still in its infancy. Elastic deformation induced by pressure and photoactuation are rare occurrences in CPs, let alone their combination in a single CP. Here, we report a one-dimensional (1D) CP comprising PbBr2 chains with 3-fluoro-4’-styrylpyridine arms showing excellent elasticity and photomechanical properties. A slender crystal can be bent to make a circle and write different shapes with restoration of original shape upon removal of the applied force. In addition, photomechanical properties triggered by [2+2] cycloaddition of the olefinic ligand can be modulated easily by variation of the crystal sizes. Crystals with bigger width show destructive photosalient effects while the smaller ones show plastic deformation like bending, twisting, curling etc. upon UV irradiation. This example provides avenue for designing CPs for multi-stimuli responsive actuating properties.
Nocturnal Enuresis
Authors: Ankit Mangla
Published: March 2021

Guest Comment on Nocturnal Enuresis by Dr. Ankit Mangla, MBBS, MD, FPN, Fellow critical care (IAP/ISCCM), Director & HOD Pediatric Institute of Renal Sciences & Senior Consultant,  PICU HOPE Hospital, Jaipur
ALLOCATING THE VARIABLE COST OF TRANSMISSION LINES DUE TO ELASTIC LOADS IN A CONGESTED POWER MARKET
Authors: Banerjee Srijan , Saha Parnab , Paul Bishaljit , Chanda Chandan Kumar
Published: March 2021

In a competitive power market, the elastic demand for electrical energy transmission is viewed as a prime competitor of generator. Remote generators are needed for transmission to compete with local generators. The value of the transmission is based on the difference of Locational Marginal Price (LMP) of the generators across the network. To maintain the well operation of power market, LMPs which provide the price sensitivity is calculated at every bus. The revenue collected by the transmission owners is a convex quadratic function of the amount of power transmitted. This revenue provides a sound impact on investment perspective for setting the price that producers and customers should pay for the network. In this paper for a three bus system, the LMPs are calculated at the buses and a demand function for the transmission has been modeled which computes the maximum revenue for the optimal transmission capacity in the syste.
An unlikely partnership? New Zealand-South Korea bilateral cooperation and Antarctic order
Authors: Flamm Patrick
Published: March 2021

© The Author(s) 2021. Published by Cambridge University Press. While the Antarctic Treaty System intended to keep Antarctica an area of international cooperation and science free from militarisation and international conflict, the region has not been completely shielded from global power transitions, such as decolonisation and the end of the Cold War. Presently, emerging countries from Asia are increasingly willing to invest in polar infrastructure and science on the back of their growing influence in world politics. South Korea has also invested heavily in its Antarctic infrastructure and capabilities recently and has been identified as an actor with economic and political interests that are potentially challenging for the existing Antarctic order. This article first assesses the extent and performance of the growing bilateral cooperation between South Korea and one of its closest partners, New Zealand, a country with strong vested interests in the status quo order. How did the cooperation develop between these two actors with ostensibly diverging interests? This article finds that what may have been a friction-laden relationship, actually developed into a win-win partnership for both countries. The article then moves on to offer an explanation for how this productive relationship was made possible by utilising a mutual socialisation approach that explores socio-structural processes around status accommodation.
Unsupervised Change Detection Driven by Floating References: A Pattern Analysis Approach
Authors: Negri RG , Frery Alejandro
Published: March 2021

© 2021, The Author(s), under exclusive licence to Springer-Verlag London Ltd. part of Springer Nature. The Earth’s environment is continually changing due to both human and natural factors. Timely identification of the location and kind of change is of paramount importance in several areas of application. Because of that, remote sensing change detection is a topic of great interest. The development of precise change detection methods is a constant challenge. This study introduces a novel unsupervised change detection method based on data clustering and optimization. The proposal is less dependent on radiometric normalization than classical approaches. We carried experiments with remote sensing images and simulated datasets to compare the proposed method with other unsupervised well-known techniques. At its best, the proposal improves by 50% the accuracy concerning the second best technique. Such improvement is most noticeable with uncalibrated data. Experiments with simulated data reveal that the proposal is better than all other compared methods at any practical significance level. The results show the potential of the proposed method.
Spectral-Spatial Aware Unsupervised Change Detection with Stochastic Distances and Support Vector Machines
Authors: Negri Rogério , Frery Alejandro , Casaca Wallace , Azevedo Samara , Araújo Maurício , Silva Erivaldo , Alcântara Enner
Published: March 2021

Submitted paper to IEEE-TGRS at January 10th, 2020.
Revisiting the effect of spatial resolution on information content based on classification results
Authors: Palacio MG , Ferrero SB , Frery Alejandro
Published: March 2021

© 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group. Polarimetric Synthetic Aperture Radar (PolSAR) images are an important source of information. Speckle noise gives SAR images a granular appearance that makes interpretation and analysis hard tasks. A major issue is the assessment of information content in these kinds of images, and how it is affected by usual processing techniques. Previous works have resulted in various approaches for quantifying image information content. In this paper, we study this problem from the classification accuracy viewpoint, focusing on the filtering and the classification stages. Thus, through classified images, we verify how changing the properties of the input data affects their quality. The input is an actual PolSAR image, the control parameters are (i) the filter (Local Mean, LM, or Model-Based PolSAR, MBPolSAR) and the size of their support, and (ii) the classification method (Maximum Likelihood, ML, or Support Vector Machine, SVM), and the output is the precision of the classification algorithm applied to the filtered data. To expand the conclusions, this study deals not only with Classification Accuracy but also with Kappa and Overall Accuracy as measures of map precision. Experiments were conducted on two airborne PolSAR images. Differently from what was observed in previous works, almost all quality measures are good and increase with degradation, i.e. the filtering algorithms that we used always improve the classification results at least up to supports of size 7 × 7.
Statistical properties of an unassisted image quality index for SAR imagery
Authors: Gomez L , Ospina R , Frery Alejandro
Published: March 2021

© 2019 by the authors. The M estimator is a recently proposed image-quality index used to evaluate the despeckling operation in SAR (Synthetic Aperture Radar) data. It is used also to rank despeckling filters and to improve their design. As a difference with traditional image-quality estimators, it operates not on the filtered result but on a derived one, i.e., the ratio image. However, a deep statistical analysis of its properties remains open and, with it, the ability to use it as a test statistic. In this work, we focus on obtaining insights into its distribution as well as on exploring other remarkable statistical properties of this unassisted estimator. This study is performed through EDA (Exploratory Data Analysis) and the well-known ANOVA (ANalysis Of VAriance). We test our results on a set of simulated SAR data and provide guides to enrich theMestimator to extend its capabilities.
Gender Gap in Upward Mobility: What is the Role of Non-cognitive Traits?
Authors: Chu Yu-Wei , Linz S
Published: March 2021

Do non-cognitive traits contribute to the gender gap in supervisory status and promotion? We use a large employer-employee matched dataset collected from six former socialist countries to assess the link between non-cognitive traits and upward mobility. Controlling for workplace heterogeneity, we find that gender differences in locus of control, the preference for challenge versus affiliation, and adherence to work ethic together can explain about 7–18% of the gender gap in supervisory status and promotion. Overall, non-cognitive traits provide an important, though modest, explanation for the gender gap in upward mobility.

The version of record is available at https://doi.org/10.1108/ijm-12-2015-0220. The full citation is as follows: Chu, Y.-W.L., and Linz, S. (2017). Gender gap in upward mobility: what is the role of non-cognitive traits? International Journal of Manpower 38, 835–853.
Discussion of “Virtual age, is it real?”
Authors: Arnold Richard , Chukova Stefanka , Hayakawa Y
Published: March 2021

The paper by Finkelstein and Cha centres around the attempt to model a
system subject to failures after it has experienced a damage and/or failure episode.
The paper discusses the validity of the assumptions of virtual age models, and provides helpful examples which elucidate the uses and shortcomings of models using
a time transformation to mimic the effect of damage and ageing.
We first recast their examples in a uniform notation. We make comments on the
nature of empirical vs. physical models, and the advantages and disadvantages
of these. We close with a brief note about our own shock/repair model and its
relationship to the time transformed failure models discussed by Finkelstein and
Cha.

This is the peer reviewed version of the following article: Arnold, R., Chukova, S., & Hayakawa, Y. (2021). Discussion of “Virtual age, is it real?” Applied Stochastic Models in Business and Industry, 37(1), which has been published in final form at https://doi.org/10.1002/asmb.2585. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
Spatio-temporal analysis of seismic anisotropy associated with the Cook Strait and Kaikōura earthquake sequences in New Zealand
Authors: Graham KM , Savage Martha , Arnold Richard , Zal HJ , Okada T , Iio Y , Matsumoto S
Published: March 2021

© 2020 The Author(s) 2020. Published by Oxford University Press on behalf of The Royal Astronomical Society. Large earthquakes can diminish and redistribute stress, which can change the stress field in the Earth's crust. Seismic anisotropy, measured through shear wave splitting (SWS), is often considered to be an indicator of stress in the crust because the closure of cracks due to differential stress leads to waves polarized parallel to the cracks travelling faster than in the orthogonal direction. We examine spatial and temporal variations in SWS measurements and the Vp/Vs ratio associated with the 2013 Cook Strait (Seddon, Grassmere) and 2016 Kaikōura earthquakes in New Zealand. These earthquake sequences provide a unique data set, where clusters of closely spaced earthquakes occurred. We use an automatic, objective splitting analysis algorithm and automatic local S-phase pickers to expedite the processing and to minimize observer bias. We present SWS and Vp/Vs measurements for over 40 000 crustal earthquakes across 36 stations spanning close to $5\frac{1}{2}$ yr between 2013 and 2018. We obtain a total of 102 260 (out of 398 169) high-quality measurements. We observe significant spatial variations in the fast polarization orientation, φ. The orientation of gravitational stresses are consistent with most of the observed anisotropy. However, multiple mechanisms (such as structural, tectonic stresses and gravitational stresses) may control some of the observed crustal anisotropy in the study area. Systematic analysis of SWS parameters and Vp/Vs ratios revealed that apparent temporal variations are caused by variation in earthquake path through spatially varying media.
Corrigendum to “The effect of nanoparticle and mesoporous TiO2 additions on the electronic characteristics of reduced graphene oxide nanocomposites with zinc oxide under UV irradiation” [Mater. Sci. Eng. B 246 (2019) 89–95] (Materials Science & Engineering B (2019) 246 (89–95), (S0921510719301679), (10.1016/j.mseb.2019.06.003))
Authors: Abbaspour S , Nourbakhsh A , Kahrizsangi R Ebrahimi , Ghayour H , MacKenzie Kenneth
Published: March 2021

© 2019 Elsevier B.V. The authors regret that due to insufficient accuracy when approving the final version, the required changes in affiliations are updated as above. The authors would like to apologise for any inconvenience caused.
Photocatalytic nanocomposite materials based on inorganic polymers (Geopolymers): A review
Authors: Falah M , MacKenzie Kenneth
Published: March 2021

© 2020 by the authors. Licensee MDPI, Basel, Switzerland. Geopolymers are ecologically-friendly inorganic materials which can be produced at low temperatures from industrial wastes such as fly ash, blast furnace slags or mining residues. Although to date their principal applications have been seen as alternatives to Portland cement building materials, their properties make them suitable for a number of more advanced applications, including as photocatalytic nanocomposites for removal of hazardous pollutants from waste water or the atmosphere. For this purpose, they can be combined with photocatalytic moieties such as metal oxides with suitable bandgaps to couple with UV or visible radiation, or with carbon nanotubes or graphene. In these composites the geopolymers act as supports for the photoactive components, but geopolymers formed from wastes containing oxides such as Fe2O3 show intrinsic photoactive behaviour. This review discusses the structure and formation chemistry of geopolymers and the principles required for their utilisation as photocatalysts. The literature on existing photocatalytic geopolymers is reviewed, suggesting that these materials have a promising potential as inexpensive, efficient and ecologically-friendly candidates for the remediation of toxic environmental pollutants and would repay further development.
Pareto front feature selection based on artificial bee colony optimization
Authors: Hancer E , Xue Bing , Zhang Mengjie , Karaboga D , Akay B
Published: March 2021

© 2017 Elsevier Inc. Feature selection has two major conflicting aims, i.e., to maximize the classification performance and to minimize the number of selected features to overcome the curse of dimensionality. To balance their trade-off, feature selection can be handled as a multi-objective problem. In this paper, a feature selection approach is proposed based on a new multi-objective artificial bee colony algorithm integrated with non-dominated sorting procedure and genetic operators. Two different implementations of the proposed approach are developed: ABC with binary representation and ABC with continuous representation. Their performance are examined on 12 benchmark datasets and the results are compared with those of linear forward selection, greedy stepwise backward selection, two single objective ABC algorithms and three well-known multi-objective evolutionary computation algorithms. The results show that the proposed approach with the binary representation outperformed the other methods in terms of both the dimensionality reduction and the classification accuracy.
Noun-noun collocations in learner writing
Authors: Parkinson Jean
Published: March 2021

© 2015 Elsevier Ltd. Studies of collocations to date have emphasised use and learning of noun-verb and adjective-noun collocations. This study uses three sub-corpora of the ICLE corpus to investigate use of noun-noun collocations by learners in their academic writing. The literature to date has focused on contexts where English is being learnt as a foreign language rather than as a second language. The study therefore compares the influence of ESL and EFL learning contexts on learner use of noun-noun collocations. Findings are that accuracy of noun-noun phrases is significantly greater in the writing of ESL learners. A second question considered is what influence the presence or absence of noun-noun phrases in the first language (L1) has on learner use of these phrases in English. For this purpose, production of noun-noun phrases in written English by L1 Mandarin writers (a language that permits noun-noun phrases) is compared to writing by L1 Spanish writers (a language that does not allow noun-noun phrases). Findings are that learners whose L1 permits noun-noun phrases produce significantly more of them in English than learners whose L1 does not. Problems that learners had in forming noun-noun phrases are discussed qualitatively, and implications for EAP teaching are suggested.
The student laboratory report genre: A genre analysis
Authors: Parkinson Jean
Published: March 2021

© 2016 Elsevier Ltd This article provides a move analysis of the student laboratory report, a genre which is central to science and engineering study, and to which students may have had little prior exposure. Using a data set of 60 highly-graded laboratory reports from the BAWE corpus (British Academic Writing in English, Gardner & Nesi, 2013), moves are described, together with typical linguistic features. Laboratory report moves are compared with moves previously identified in empirical research articles (RAs), a genre which has the same macrostructure and also presents experimental findings. The different writer-reader relationships and different purposes in these genres (pedagogical in the laboratory report, and presenting new research in RAs) result in some significant differences in the realization of moves. The findings are potentially useful to teachers of science writing.
Child Labour in Pakistan: Way Out Analyzing Constitutional Mandate
Authors: Barkat Ali  , Shaukat Hussain Bhatti  , Fazli Dayan
Published: March 2021

Purpose: Child Labor is the worldwide social issue. The study undertaken attempts to identify the reasons behind child labour and to assess the socio-economic related problems faced by the working children. This study further analysis the effectiveness, sufficiency and potential of the constitutional provisions concerning children’s rights as committed in the Constitution, 1973.

Findings: In Pakistan, child labour is not only prohibited, it is discouraged by providing a free compulsory education, self-respect and social welfare. Though, these provisions are healthy sign, but are not comprehensive on child labour particularly for determining the   minimum age and nature of work. Even these provisions are not clear, and harmonious with one another.

Implications: Furthermore, the ordinary laws are not in compatibility mode of the constitutional provisions. Such complications are both about child and child labour definition. So, it is suggested to have a single common standard of these two basic factors in child labour context for saving the children from indulging in child labour in Pakistan.
Strict Rules of Free Competition (about The Sveriges Riksbank Prize in Economic Sciences in Memory of Alfred Nobel 2020)
Authors: Voronov Y. P.
Published: March 2021

Studying the research results by Nobel prize-winning economists is a fundamentally important task for determining the most promising areas of development of Russian economic science. The author traces the connections between all these works and their predecessors’ work, many of whom were also awarded the Nobel prize in economics. Three lines of development of the predecessors’ achievements are identifid: information asymmetry, limited rationality, the design of market mechanism and new institutionalism. The article does not address the problems of auction theory related to its formal justifiation, which is part of mathematical economics and game theory. However, it is noted that this is an essential part of the laureates’ achievements. The article’s main conclusions are that the prize received for “improving the theory of auctions” fis into the broader economic research context. The winners solved the problems of maintaining free competition and reducing the market’s likelihood of monopolization. The author pays special attention to the results of the empirical analysis of actually implemented auctions. This analysis is divided into three parts, corresponding to the three stages of each auction: starting problems (distrust, the reputation of participants, etc.), the course of the auction (behaviour of participants and results, in particular, the “winner’s curse”.
A review on yield response to nitrogen, potassium and manure applications in potato (Solanum tuberosum L.) production
Authors: Otieno Hillary M.O. , Mageto Edna K.
Published: March 2021

Potato productivity has stagnated and remained low due to, among other causes, increasing soil infertility and poor nutrient management strategies. To avert this situation, it is essential to have a better understanding of potato response to nitrogen and potassium nutrients. Like other crops, potatoes require an adequate and balanced supply of nutrients for better growth and tuber yields. To achieve that, it is essential to conduct an extensive soil analyses for the entire farm. However, this process is expensive for most resource-constrained farmers. Moreover, the current recommendations used in the region are generic and focuses more on nitrogen than potassium. Hence, there is a need to focus on readily and freely available information for enhanced decision making. The assumption that the soils in the region are fertile and can supply adequate potassium is no longer valid, and now necessitates more actions such as adopting integrated soil fertility and precise application of nutrients within the 4R principles. All these aspects are well covered in this article. We believe the information presented in this manuscript is valuable and give a better foundation for future research and recommendations in potato production.
Agroforestry for mountain development: Prospects, challenges and ways forward in Nepal
Authors: Atreya Kishor , Subedi Bhishma P. , Ghimire Puspa L. , Khanal Sudarshan C. , Charmakar Shambhu , Adhikari Rabindra
Published: March 2021

Most of the agroforestry systems (AFS) in Nepal are traditional, and deliberate management of trees, crops and livestock as an integrated and interactive agroecosystem, albeit its enormous socio-economic and ecological benefits, is limited. The objective of this review paper is to understand the prospects, analyze challenges and suggest practical solution for promoting agroforestry as a viable system balancing economic, social and environmental concerns. We develop this paper based on practical experience on the ground and an in-depth review of relevant literature and highlights the prospects, challenges and ways forward of AFS, both farm-based and forest-based, in Nepal. Nepal has enormous agroecological diversity, suitable land availability for agroforestry, traditional knowledge, skill and labor forces, and huge prospects of adapting new technologies and developing market systems, especially considering emerging markets for developing remunerative and environment friendly value chains. However, the prospective value chains of the mountain agroforestry products face many challenges, including i) socio-economic constraints of the farmers mainly because of high initial adoption costs, limited information on benefit-cost of agroforestry practices, limited knowledge on full benefits of agroforestry, and limited markets and marketing information; ii) institutional constraints because of unclear policy to support agroforestry, the lack of extension services and undefined administrative boundaries; and iii) inadequate scientific knowledge, expertise and technologies to address management complexity of agroforestry system. We therefore suggest having a scan of those challenges and find out solutions, especially for promoting growth and competitiveness of the sector with poverty reduction strategy ensuring availability of food, fuel, fodder and employment opportunity for local communities. The paper provides a few successful cases of AFS and finally suggests ways forward to promote AFS and a business model which could help achieve the untapped potentials for enhancing income and employment opportunity, achieving food and nutrition security, and building sustainable land use systems.
Optimization of dietary protein level for good aquaculture practice based carp fattening in ponds under drought prone area of Bangladesh
Authors: Hossain Md. Anwar , Hossain Md. Akhtar , Haque Md. Ayenuddin , Harun-Ur-Rashid Md. , Rahman Md. Moksedur
Published: March 2021

Good aquaculture practice (GAP) based carp fattening is a potential technique to obtain higher and safe fish production within shorter period in ponds of drought prone area. Sustainability of this technique, however, is constrained by high feed cost and poor water quality. Therefore, as an overcoming effort, three diets (protein content of 20%, 25% and 30%) under three different treatments (T1, T2 and T3) were tested during January-June, 2020 in fattening ponds of carps (Catla, Gibelion catla; silver carp, Hypophthalmichthys molitrix; rohu, Labeo rohita; mrigal, Cirrhinus cirrhosis; and carpio, Cyprinus carpio var. specularis) under Rajshahi district, Bangladesh. Variation in protein level had no significant effect on environmental parameters of pond water. Combined fish yield was found to vary significantly (P<0.05) among the treatments, while feed conversion ratio did not vary significantly. Although second degree polynomial regression analysis identified 28.50% dietary protein for optimal growth of carps but no significant difference between T2 and T3 was found for the total fish yield. However, significantly (P<0.05) highest cost-benefit ratio obtained with the diet containing 25% protein suggested this protein level in diet was profitable for carp fattening in pond.
Las necesidades de la formación interdisciplinar de profesionales de ciencias de la salud en el área de cuidados paliativos
Authors: Molina Cardona Edith Milena , Preciado Duarte Nidia Yineth , Puerto Pedraza Henry Mauricio
Published: March 2021

El presente artículo expone la reflexión de las necesidades de formación de profesionales en el área ciencias de la salud, en niveles de pregrado y postgrado en Cuidados Paliativos. Se tuvo en cuenta los cambios en indicadores demográficos y de morbilidad, pasando por las últimas décadas de las enfermedades generales a los procesos crónicos y de otras patologías degenerativas. Además, se reconoce que gran parte de las personas con diagnóstico de enfermedades crónicas y al final de su vida, presentan diferentes síntomas relacionados con sufrimiento físico y emocional intenso, que precisan una atención especializada en salud integral. En este sentido, el objetivo del presente artículo se fundamenta en el análisis reflexivo de las orientaciones que realizan entidades nacionales e internacionales expertas en la problemática, así como fuentes de información científica e institucional que responden al fenómeno de estudio; las conclusiones de la reflexión se centran en la prioridad del fortalecimiento en la formación integral e interdisciplinaria de los profesionales de ciencias de la salud, el fortalecimiento de la salud pública, así como de los conocimientos teóricos y metodológicos aplicados a la práctica profesional en dicho campo.
Ocho años de gestión del desarrollo profesoral - Programa Institucional Anual de Capacitación, Actualización y Formación Permanente (PIACAFP) del 2011 al 2018
Authors: Roa Trujillo Sonia H. , Leal Patricia
Published: March 2021

En este artículo se presenta un histórico del programa institucional anual de capacitación, actualización y formación permanente en el transcurso de siete años consecutivos entre el 2011 al 2018, donde se expone ante la comunidad educativa de la Fundación Universitaria Sanitas (FUS) logros, avances y estadísticas que dan cuenta del proceso de desarrollo de dicho programa. Por lo tanto, se abordan aspectos relacionados a los tres proyectos del programa, como son: histórico estadístico formación docentes modelo pedagógico institucional ABP, histórico del Observatorio Pedagógico en Aprendizaje Basado en Problemas (OP – ABP) de la FUS y Oferta Desarrollo Profesoral en el año 2018, así como conclusiones que se acercan a reflexiones institucionales construidas que afianzan las ya expuestas, en las publicaciones de la Revista Profesoral Universitario – REDPRO; registros significativos que dan cuenta de las acciones sistemáticas en la capacitación de competencias para el ejercicio de la docencia, en el contexto de Educación Superior Sanitas.
¿Cómo cambia la experiencia vivida de los estudiantes en el aula cuando los docentes aumentan de nivel de formación en ABP? Caso UPD sistema de salud en el Programa de Especialización en Gestión de la Salud Pública
Authors: Gómez Rivadeneira Alexander , Caicedo Montaño Camilo A.
Published: March 2021

El presente artículo describe la experiencia de los estudiantes de la Especialización en Gestión de la Salud Pública de la Fundación Universitaria Sanitas (FUS) al cursar una Unidad Pedagógico Didáctica (UPD) en dos momentos distintos y elaborada por los mismos docentes pero con diferentes grados de profundidad en el Aprendizaje Basado en Problemas (ABP). La experiencia vivida por los estudiantes se recogió con la técnica del grupo de discusión a través del análisis de cuatro categorías: 1) la experiencia didáctica en formación virtual y presencial; 2) la calidad técnica de los contenidos; 3) el grado de satisfacción y aplicabilidad laboral y 4) el sentido de comparación entre las dos experiencias. Como resultado se identificó que los estudiantes refieren una experiencia didáctica positiva, la transformación de sus habilidades académicas, resaltan la idoneidad de los contenidos y el aporte de las actividades planteadas, así como el desarrollo de un mayor grado de compromiso del estudiante para organizar su tiempo, cuando la UPD se elabora por profesores con entrenamiento en el sistema didáctico de Aprendizaje Basado en Problemas (ABP).
Bataan-Cavite Interlink Bridge, Philippines – a new 32 km sea crossing
Authors: Yip Sammy , Kite Steve , Vishnoi Paresh , Venkatesha Vikas
Published: March 2021

Bataan-Cavite Interlink Bridge (BCIB) in the Philippines is a proposed 32km sea-crossing which will connect Bataan to Cavite, to unlock opportunity for economic growth and expansion outside Metro Manila. A Feasibility Study was carried out to plan the road link, which would involve two major navigation bridges, long marine viaducts, and interchange connections. This paper outlines the Feasibility Study and the preliminary design of the crossing, and highlights how the bridge options were assessed in order to come up with an optimum solution.
Connecting Auckland through innovative engineering solutions: the Northern Corridor Improvements Project
Authors: Piras Sabina , Corbett Paul , Mirocha Tomasz
Published: March 2021

The Northern Corridor Improvements project is an accelerated highway development scheme that has been identified by the New Zealand government as being necessary to improve travel time and reliability of inter-regional travel between Auckland and Northland. Located on Auckland’s North Shore, this project will relieve traffic congestion by adding more traffic lanes along the State Highway 1 Northern Motorway (SH1) as well as constructing an extension to a designated busway corridor. Additionally, the project will provide a direct motorway-to-motorway connection between State Highway 18 Upper Harbour Highway (SH18) and SH1. The project scope involves the construction of twelve bridges, including a piled underpass structure to link SH1 to SH18, retaining walls and over 7km of new walking and cycling paths.

With design complete and construction well underway, this paper will discuss the design of the structures, highlighting the analysis methodology adopted for the fully-integral bridge piers, as well as the design considerations required to integrate the structures with several stages of traffic management. Additionally, this paper will describe the construction of the bridges, including challenges faced, construction methodology adopted, and details developed to optimise constructability.
Shear connection between precast concrete bridge segments built with thin-walled elements
Authors: Huber Tobias , Fasching Stephan , Kollegger Johann
Published: March 2021

Segmental bridge construction combines the advantages of prefabrication, for example the reduction of construction time and very high product quality, with those of common bridge erecting methods. Short precast segments are assembled and prestressed to form the complete superstructure. New methods divide these segments into prefabricated elements to create new lighter versions of the segments. For this to work, new joint types must be developed which can ensure the force transfer between the segments. In this paper, several methods, including a new concept for joining thin-walled pre-fabricated elements, are described. Push-off tests with a constant lateral force were carried out to assess the shear strength and deformation behaviour. The main parameters were the joint type (wet joints: plain, grooved, keyed; dry joints), the mortar type, and the level of lateral force. In this paper, the test results are presented and recalculations with a design code are shown.
Assessment of corrosion-induced bond deterioration in reinforced concrete: towards a splitting crack-based approach
Authors: Tai Mak Michele Win , Lees Janet M.
Published: March 2021

Reinforced concrete structures are subjected to several sources of deterioration that can reduce their load-resisting capacity over time. This has significant consequences for the management of infrastructure, leading to high costs of maintenance, repair, strengthening and premature decommissioning. Assessing the residual capacity of structures is challenging but paramount to manage the infrastructure network effectively. Corrosion of the internal steel reinforcement is among the main causes of deterioration in reinforced concrete bridges. The subsequent reduction in steel-to-concrete bond strength is difficult to evaluate with accuracy. There is no unified theory of general validity. Most existing models adopt measures of the level of corrosion as the key parameter to evaluate the bond reduction. In this paper, a different approach is investigated. Corrosion-induced splitting crack widths are used as the fundamental indicator of bond strength reduction, irrespective of the associated degree of steel corrosion. Available experimental results on deformed steel bars embedded in concrete subjected to either natural or accelerated corrosion, with or without transverse reinforcement, are analysed and compared with a different perspective. The analysis indicates that this new splitting crack-based approach can lead to more accurate predictions. This contributes to a better understanding of the fundamental principles underlying bond of corroded reinforcing bars. Enhanced assessment strategies can lead to a reduction of the safety risks, maintenance costs and environmental footprint of the infrastructure network.
Experimental study of the steel-concrete connection in the hybrid girder continuous rigid frame bridge
Authors: Chen Debao , Su Qingtian , Lin Zhiping , Lin Jiang , Cai Yuqiang
Published: March 2021

A composite joint connecting the steel girder and the concrete girder with the connectors of perfobond ribs and studs was applied in Anhai Bay Bridge under construction with a span of 135m+300m+135m, which will become the second-largest span of hybrid continuous rigid frame bridge in the world after completion. In this paper, the whole and partial finite element models developed to analyze the main bridge and the detailed load-bearing capacity of the steel-concrete composite joint are described. To study the failure mechanism and evaluate the bearing capacity of the steel-concrete connection, the typical concrete-filled steel cells with a reduced scale of 1:2 were chosen to be the test model. The experiment verifies that the steel-concrete connection has enough bearing capacity, which can resist the compression and shear design forces. The back bearing plate plays an important role in uniformly distributing force.
Seismic performance of a bridge pier reinforced with titanium alloy bars
Authors: Acharya Mahesh , Mashal Mustafa , Cantrell Jared
Published: March 2021

The research in this paper focuses on the use of Titanium Alloy Bars (TiABs) in concrete bridge piers located in high seismic zones. The paper discusses a new bridge pier system that incorporates both seismic resiliency and durability concepts. A large-scale bridge pier, reinforced with TiABs and spiral, is tested under quasi-static cyclic loading protocol. The results are compared against a benchmark cast-in-place pier with normal rebars and spiral under the same loading protocol. Based on the testing results, the use of TiABs in concrete piers would reduce rebar congestion up to 50%, provide adequate ductility, and would result in reduced residual displacement following an earthquake. The pier reinforced with TiABs reached higher drift ratios compared to cast-in-place pier. Furthermore, smaller flexural cracks that are likely to appear in the plastic hinge zone during moderate earthquakes are not a major concern for structural performance and durability of bridge piers reinforced with TiABs.
Full-scaled experiment on flexural behavior of pre-tensioned prestressed bulb T-beam
Authors: Feng Bowen , Liu Yongjian
Published: March 2021

In order to study the flexural behavior of bulb T-beam, a full-scaled specimen was test until failure. The prestress friction loss, load-displacement relationship, crack distribution and failure mode of the specimen were measured. It showed that obvious friction existed between plate-type bend device using 16Mn and steel strand and the frictional coefficient equals 0.25. The failure mode of the test beam conformed to the design criterion of balanced-reinforced beam. Additionally, the test results were compared to the results calculated by guidelines including JTJ 3362-2018, GB 50010- 2010, ACI 318m-14 and Eurocode 2. It showed that all the guidelines could accurately predict the cracking moment, but overestimate the ultimate flexural capacity. Eurocode 2 and JTG 3362-2018 could accurately determine the deformation and crack width, respectively.
An earthquake resistant pier system for Accelerated Bridge Construction
Authors: Cantrell Jared , Mashal Mustafa , Ebrahimpour Arya
Published: March 2021

Accelerated Bridge Construction (ABC) has been gaining popularity in the United States. ABC offers rapid construction, less traffic disruption, improved quality and on-site safety, better durability, and less environmental impacts. Despite these advantages, application of ABC in seismic regions is still a challenge. In this research, a new precast pier system is proposed to emulate the traditional cast- in-place seismic design (e.g. formation of plastic hinges during earthquakes). The precast elements are connected using telescoping concrete-filled steel tubes in a grouted application. Large-scale experimental testing is carried out to investigate the seismic performance of the proposed pier system and to compare it against the traditional cast-in-place construction. Experimental results showed better ductility, strength and performance of the precast piers compared to cast-in-place benchmarks. Distributed plasticity models are developed to capture the seismic performance of the proposed precast pier system. The Idaho Transportation Department is planning to implement the research in this paper in an actual bridge in Idaho.
Reliability based performance assessment of a roadway bridge under seismic actions
Authors: Mendoza Carlos , Matos José , Galvão Neryvaldo , Viviescas Álvaro
Published: March 2021

External events represent the most common causes of bridge failure which could indicate distress, partial or total collapse (failure of all substantial parts of a bridge). One of the main environmental factors are earthquakes, which have a high impact on bridges due to irregularities presented in both substructure and superstructure and vulnerabilities acquired by the codes used in its design. This article presents a framework to obtain the reliability index of a bridge under seismic events, using response surface method and first order reliability method, based on random variables that affect the structure capacity (pushover analysis) and the seismic loads (peak ground acceleration). The bridge reliability of the case study is updated using visual inspection techniques. Results indicate that the vulnerable zone on the bridge is its shortest pier and the failure could occur due to high shear concentration in the hinge at the bottom of the pier.
Design of the Shintomei-Nakatsukawa Bridge - An extradosed bridge considering effect of large displacement due to a fault
Authors: Yamaguchi Takeshi , Aoi Hiroki , Wakabayashi Dai
Published: March 2021

The Nakatsugawa Bridge is constructed over a valley with both ends linked to a tunnel. It was confirmed that there is a fault in the valley. This fault is likely to cause a relatively large vertical displacement, and fault fracture zones are distributed over a wide area. Considering these topographical and geological conditions, we planned a triple-span PC extradosed bridge which will prevent collapse in the event of a fault displacement, averting irreparable damages. Consequently, the side span is extremely short in comparison with the central span, because of space restrictions affecting arrangement of pylons and piers. This presented a challenge in that a significant imbalance between the spans might lead to a negative reaction at the girder end. This paper discusses a series of reviews made for bridge planning and design, and reports that the balance between the spans was improved successfully by using light weight butterfly webs exclusively for the central span.
Analysis of Performance Evaluation Index for bridge group networking monitoring and collaborative supervision
Authors: Zhang Liye , He Yong , Cheng Shoushan , Wang Guoliang , Ren Hongwei , Dong Lijuan , Wang Bingjian , Chen Ke , Liu Hanyong
Published: March 2021

With the number of bridges increases, the bridge health monitoring (BHM) technique is developing from single bridge monitoring to collaborative supervision of bridge group. Therefore, there are many technical problems need to be solved especially the performance evaluation index for bridge group network. This paper analyses the performance evaluation index of the bridges and bridge group network, establishes the performance evaluation index for bridge group based on rating factor (RF) and technical condition evaluation index. Based on bridge field testing and monitoring data, bridge technical condition evaluation index and performance evaluation method for bridge group are proposed. A case study demonstrates that the research results provide support for bridge group networking monitoring and collaborative supervision.