bluuebunny/crossref_metadata_2025 huggingface dataset:
Mudança de Postura?: A Conduta Cidadã no Uso de Sacola Plástica no Varejo
Authors: Viegas Daniela , Teodósio Armindo dos Santos de Sousa
Published: July 2019

ara compreender os desafios da construção de ações e políticas capazes de renovar as práticas de consumo, problematiza-se neste artigo a postura cidadã relacionada à sustentabilidade, especificamente em relação à lei 9.529/08 de proibição da distribuição gratuita de sacolas plásticas pelo varejo, aprovada de forma pioneira em Belo Horizonte/MG. Além do estudo acerca da conduta da Prefeitura de Belo Horizonte e de órgãos envolvidos com a aprovação da lei, foi abordada também a aceitação da mudança por parte dos munícipes. O estudo qualitativo envolveu a percepção do consumidor acerca da lei, além da realização de entrevistas com representantes do projeto de lei. No caso da proibição das sacolas plásticas no município de Belo Horizonte, identificaram-se falhas que não permitiram o completo funcionamento do plano de ação da lei, apesar de se observar uma redução no uso de sacolas, mesmo após cinco anos de execução da lei.
Consideraciones actuales sobre el uso de férulas oclusales en rehabilitación oral: una revisión crítica
Authors: Chalco Valdivia Anny Valeria , López Flores Ana Isabel
Published: July 2019

El uso de las férulas oclusales en la actualidad, en el vasto campo de la odontología, es de gran importancia para el tratamiento de trastornos témporo mandibulares (TTM), así como en el tratamiento de otras para funciones relacionadas con la articulación témporo mandibular (ATM). Actualmente, existe variedad en cuanto al diseño de férulas oclusales, hechas con diferentes materiales, con diferentes resistencias y utilizadas para cada tipo de disfunción temporomandibular que se presente, así como para las parafunciones existentes. Dentro de esta variedad son solo cinco tipos de férulas las que se conocen ampliamente, según la evidencia científica. Cada una de ellas tiende a considerar diversas características en la forma de fabricación y sus indicaciones; así mismo, el clínico debe ejecutar una buena elección, un plan de control adecuado para cada caso, con un diagnóstico acertado que llevará al éxito de los resultados. Se debaten diferentes aspectos en cuanto el uso de las férulas en el tratamiento de rehabilitación oral, incluyendo su uso para desprogramar la ATM, correcciones en la relación cóndilofosa, eliminación de desarmonías oclusales para aliviar el dolor en la ATM, su influencia en la eficiencia muscular y su efecto en la carga muscular. Se debe diseñar un tipo de férula para cada trastorno en específico y evaluar su verdadero valor terapéutico. En esta revisión crítica, se busca describir y analizar el uso de las férulas oclusales, sus principales funciones y aplicaciones en pacientes con diferentes trastornos.
Predictors of antibiotics prescription for febrile patients: A health facility-based survey in the Greater Accra region of Ghana
Authors: Opoku Michael Mireku , Bonful Harriet Affran , Koram Kwadwo Ansah
Published: July 2019

Introduction

Frequent or/and misguided prescription of antibiotics are important facilitators of the emergence and spread of antibiotic resistance. In the absence of the implementation of effective interventions to control antibiotic use, its consumption may quadruple. Antibiotic stewardship interventions must be appropriately targeted to enhance the proper use of antibiotics. The objective of this study was to determine the predictors of prescribing antibiotics to febrile patients who seek care in health facilities within the Greater Accra region of Ghana.

Methods

Secondary data obtained from a review of medical records of 2,519 febrile patients at the outpatient department of 6 health facilities in 3 municipalities during the baseline survey of a quasi-experiment in 2016, were used. In addition, sociodemographic data on the prescribers who saw the patients were obtained. The primary outcome was prescription of any antibiotic. Predictor variables included patients’ demographics, symptoms, laboratory investigations, diagnoses and prescribed medicines. Binary and multivariable logistic regression analyses were used to determine the predictors of antibiotics prescription. Clustering was adjusted for in all the analyses.

Results

The prevalence of antibiotics prescription was 70.1% (95% CI: 67.7-72.4). Prescribers with 6 to 9 years and 10 or more years of practice experience were 3 (95% CI: 1.99, 4.44) and 1.6 (95% CI: 1.12, 2.27) times more likely to prescribe antibiotics, respectively (p < 0.001). IMCI training was associated with a 2.3 (95% CI: 1.54, 3.53, p < 0.001) times higher odds of antibiotic prescribing. Patients aged 5 years or more were 60% less likely to be prescribed antibiotics compared with those under 5 years (AOR=0.40, 95% CI: 0.32, 0.51; p<0.001). Patients referred for laboratory investigations were 29% less likely to be prescribed with antibiotics than those not referred. Presenting to the outpatient clinic with cough was associated with a 3.5 (95% CI: 2.54, 4.92) times higher odds of antibiotics prescribing.

Conclusion

Prescription of antibiotics to febrile patients was high. Promoting laboratory testing can potentially reduce irrational antibiotics prescribing. Prescribing antibiotics for children under five and the prescribing practices of experienced prescribers should be targeted with interventions.
Treatment outcome of tuberculosis patients at Debretabor General Hospital, Amhara, Northwest Ethiopia
Authors: Andualem Tesfaye , Taklual Wubet
Published: July 2019

Introduction

Tuberculosis is still a global health problem. Especially, in developing countries where overcrowded and lack of awareness is existed. According to WHO, to monitor the effectiveness of tuberculosis prevention and control program, assessing tuberculosis outcome is important. The aim of this study was to determine treatment outcome of tuberculosis patients in Debretabor General Hospital, Debretabor, Northwest Ethiopia, 2019.

Materials and methods

A retrospective study was carried out between December 2016 to December 2018 from TB patients attending the health institutions of Debretabor General Hospital. All tuberculosis cases reported between 2016-2018 were reviewed carefully and analyzed. A total of 455 Tb patients were enrolled in this study and data were coded and entered in to the computer for statistical analysis using SPSS version 20 and Epi-info soft wares.

Result and Discussion

Within the study period a total of 455 study participants were requireted. Tuberculosis type was categorized as 88(18.0%) were smear positive pulmonary tuberculosis, 192(42.2%) were smear negative pulmonary tuberculosis and 181(39.8%) were extra pulmonary tuberculosis. Among the study subjects 86(18.9%) were HIV seropositive. Of the total study subjects, treatment completed (357)78.5%, cured (57)12.%, death (16)3.5%, treatment failure(4)0.9%, transfer out (21)4.6%. Good proportion of TB treatment success rate was in 15-44 yrs 310/326(95.0%) where as poor treatment success rate was in 0-14 years 26/42 (61.9%). Being an urban also has a high treatment success rate310/325(95.4%). 408(89.7%) were successfully treated.

Conclusion

The treatment success rate of tuberculosis patients was satisfactory 89.7%. In the study, treatment of HIV-TB co-infection need a better attention for good treatment outcome.
Molecular characterization of some landraces and varieties of Date palm (Phoenix dactylifera L.) from Afar region of Ethiopia using ISSR markers
Authors: Indracanti Meera , Mekonnen Dawud Takele , Tsegaw Mesfin
Published: July 2019

Back ground

Date palm (Phoenix dactylifera L.) is one of the oldest fruit trees in hot arid region of the world including North Africa. In some areas of Afar region of Ethiopia, date palm grow as landraces, are in danger due to introduction of improved cultivars. Present study was carried out to fill knowledge gap about molecular diversity of this crop in Afar region. Molecular studies of 5 landraces and 3 introduced cultivars of date palm from Afar region of Ethiopia were tested using 21 randomly selected ISSR primers for amplification and polymorphism detection using genomic DNA. ISSR markers across 8 date palm varieties were scored for their presence (1) or absence (0). Shannon's Information index (I) and polymorphic information content (PIC) were analyzed by popGENE 32 and online PIC calculator respectively.

Results

17 out of 21 ISSR markers used for this study produced a total of 557 scorable DNA fragments with average of 33.52 per marker and 61.68, 43.93 and 68.22% polymorphism were obtained within local landraces, introduced varieties and among all samples respectively. The genetic distance among all samples ranged from 0.1402 to 0.5953; and the dendrogram separated date palm varieties into seven clusters. ISSR markers used for this study have high discrimination power and the average values of Shannon's information index and PIC were 0.318 and 0.76 respectively.

Conclusion

Genetic diversity was observed among all date palms studied in this investigation. To have better understanding on genetic diversity of date palm in the Afar region, further research should be done using SNP markers and landraces should be registered.
Alcohol drinking, smoking and food insecurity in Venezuelan parents as potential determinants of their children’s growth
Authors: Herrera Marianella , Rodríguez-Arroyo Greta , Vansant Greet , Roelants Mathieu , Soubry Adelheid , Macías-Tomei Coromoto , Landaeta-Jimenez Maritza , Lopez-Blanco Mercedes
Published: July 2019

Life conditions are key factors for defining growth and development of future generations. Exposure of parents to alcohol, tobacco, food insecurity conditions and adverse socioeconomic environment as part of their lifestyle and quality of life, have been reported to affect their children’s health and wellbeing. Prenatal exposures have been extensively documented, but less is known about influences from parental harmful habits and disadvantaged environment during children‘s school years.
The aim of this study is to examine potential associations between parental habits and environmental socioeconomic conditions, including food security status, and anthropometric characteristics of their children.
Parental smoking, alcohol intake, food security, and socioeconomic status (SES) were explored in parents of 1730 children recruited at private and public schools in eight Venezuelan cities. These qualitative variables were collected through a semi-structured questionnaire. Weight, height and body mass index were measured using standardized methods in children. Height and BMI were converted to z-scores according to WHO international growth reference.
Low BMI z-scores in children were significantly associated with mothers consuming alcohol. The frequency of children with short height was higher in households with impaired access to quality foods and where mothers reported low and very low food security status.
In brief, our study indicates that social environment could have detrimental effects on child anthropometry thus, affecting their wellbeing.
Genotyping pepper varieties using Target SNP-seq reveals that population structure clusters according to fruit shape
Authors: Du Heshan , Yang Jingjing , Chen Bin , Zhang Xiaofen , Zhang Jian , Yang Kun , Geng Sansheng , Wen Changlong
Published: July 2019

Background
The widely cultivated pepper (Capsicum spp.) is one of the most diverse vegetables; however, little research has characterized the genetic diversity and relatedness of commercial varieties grown in China. In this study, a panel of single-nucleotide polymorphisms (SNPs) was created that consisted of 97 perfect SNPs, which were identified using re-sequencing data from 35 diverse C. annuum lines. Based on this panel, a Target SNP-seq was designed that combined the multiplex amplification of the perfect SNPs with Illumina sequencing to detect polymorphisms across 271 commercial pepper varieties.

Results
The perfect SNPs panel had a high discriminating capacity due to the average value of polymorphism information content (PIC), observed heterozygosity (Ho), expected heterozygosity (He), and minor allele frequency (MAF), which were 0.31, 0.28, 0.4, and 0.31, respectively. Notably, the studied pepper varieties were morphologically categorized based on fruit shape; blocky, long horn, short horn, and linear-fruited. The long horn-fruited population exhibited the most genetic diversity followed by the short horn, linear, and blocky-fruited populations. A set of 35 core SNPs were then used as KASPar markers, another robust genotyping technique for variety identification. Analysis of genetic relatedness using principal component analysis (PCA) and phylogenetic tree construction indicated that the four fruit shape populations clustered separately with limited overlaps. Based on STRUCTURE clustering, it was possible to divide the varieties into five subpopulations, which correlated with fruit shape. Further, the subpopulations were statistically different according to a randomization test and Fst statistics. Notably, two SNP loci, CaSNP118 and CaSNP053, which are located on chromosome 11 and 6 were significantly associated with fruit shape (p < 1.0 × 10 -4)

Conclusions
Target SNP-seq developed in this study appears as an efficient power tool to detect the genetic diversity, population relatedness and molecular breeding in pepper. Moreover, this study demonstrates that the genetic structure of the pepper varieties is significantly influenced by breeding programs focused on fruit shape.
Effectiveness of innovative training models in building capacity of frontline health workers to manage Non-communicable diseases. A cross-sectional study in four counties in Kenya
Authors: kosgei Sarah , Kiilu Colleta , Jefferys Sarah , Aiello Alice , Were Christopher , Sifuma Bryson , Kimathi George , Kimeu Anastasiah
Published: July 2019

Objectives

This research sought to evaluate the effectiveness of innovative learning approaches in training health workers for effective management and control of diabetes and childhood asthma.

Setting

Assessment was conducted in Kilifi, Nyeri, Nairobi and Kakamega counties in Kenya in selected sub-counties in the 4 counties.

Participants

Health workforce were randomly selected. Selection was stratified by county and model of training then inflated to account for loss to follow up and 382 participated based on availability and saturation.

Interventions

Based on high burden of non-communicable diseases (NCDs) specifically Diabetes and asthma in Kenya, AMREF and partners implemented a three-year project (June 2015 - May 2018) aimed at building the capacity of health workers to effectively manage and control the NCDs. It was implemented in 4 counties. The trainings were done using face to face, blended, elearning and mlearning.

Primary and secondary outcome measures

The research measured the effectiveness of the training models in improving the capacity of health workers to effectively manage and control the NCDs.

Results

The trainings appreciation rate was 95% across the four approaches. Health workers were well equipped with skills to address asthma (85.6%) and diabetes (94.2%). Satisfaction though lower in eLearning (64%) due to reliability of internet and learning platform downtime against mlearning (89%) and face to face (90%), all the training models were found to contribute to improved knowledge.

Conclusions

The different training models were very effective. The training was successful in increasing knowledge, confidence and commitment to spearhead the preventive and curative aspects of the illnesses. No training model was superior in terms of the degree of satisfaction, improving knowledge, shaping behaviour change and organisational performance.

Further research

There is need to asses an elearning / mlearning training model that is purely technology based and compare that with the blended approaches of learning.
Positively association between novel cardiac biomarkers soluble ST2 and heart Dosimetry parameter in thoracic cancer chest radiation
Authors: Zeng Zhi-Min , Xu Peng , Zhou Shan , Du Hai-yang , Jiang Xiao-liu , Cai Jing , Huang Long , Liu Anwen
Published: July 2019

Background

Early screening and diagnosis of radiation-induced heart disease are difficult in patients with chest radiation exposure. sST2 involved in myocardial stress or injury. We aimed to evaluate short-term sST2, B-type natriuretic peptide (BNP) and the left ventricle ejection fraction (LVEF) changes and the relationship between sST2 and heart dose in patients who receive chest radiation.

Methods

We prospectively collected thoracic malignancy cancer patients from October 2016 to August 2018 who received chest radiotherapy. sST2 and BNP was measured before (recorded as preST2, preBNP), in the middle (recorded as midST2, midBNP) and after radiotherapy (recorded as postST2, postBNP). LVEF was detected using echocardiography before and after radiotherapy. BNP and sST2 among pre, mid, post groups were compared using nonparametric test. LVEF was compared using pair t-test. Standardized sST2 was calculated as postsST2/presST2. The correlation of standardized sST2 and heart dosimetry parameters were measured by Spearman’s correlation test.

Results

Sixty patients were enrolled, including 37(61.67%) lung cancer, 18(30.00%) esophageal cancer and 5 (8.33%) thymoma patients. The median preST2, midST2, postST2 was 3.86 (IQR1.56-8.37), 6.33 (IQR 2.01-9.32) and 8.00 (IQR 4.2- 10.9) respectively. sST2 elevated with the progression of thoracic irradiation (p<0.001). The median preBNP, midBNP and postBNP was 22.56 (IQR 7.25-63.5), 32.25 (IQR 18.85-52.97) and 32.41 (IQR 17.23-55.97), respectively. The mean preLVEF and postLVEF was 64.36 and 62.76, respectively. There was no significant change in BNP and LVEF after radiotherapy. Standardized sST2 was correlation with V5Gy, V10Gy, V20Gy, V30Gy, mean heart dose and left anterior descending artery (LAD) (V5Gy rs = 0.541, p = 0.00; V10Gy rs = 0.504, p = 0.00; V20Gy rs = 0.437, p = 0.001; V30Gy, rs = 0.305, p = 0.026; mean heart dose rs = 0.395, p = 0.003 and mean heart dose of LAD rs = 0.414, p = 0.002).

Conclusion

BNP and LVEF were not changed after thoracic radiation. Serum sST2 levels were elevated during radiotherapy and associated with heart dose parameters in thoracic malignant tumor patients. sST2 would be regarded as a potential early diagnostic marker for RIHD.
CLINICAL EXPERIENCE IN USING TARGETED THERAPY FOR DISSEMINATED GASTROINTESTINAL STROMAL TUMORS
Authors: Adlejba S. T. , Kogonija L. M. , Gurevich L. E. , Sidorov A. V.
Published: July 2019

We report a case of disseminated gastrointestinal stromal tumor effectively treated with imatinib, a selective tyrosine kinase inhibitor.

Background.Treatment of gastrointestinal stromal tumors (GIST ) still remains a clinical challenge. Since 2001 a breakthrough has occurred in the treatment of patients with GIST due to a successful use of imatinib, the targeted drug from the group of tyrosine kinase inhibitors, which is effective in the first line of inoperable and/or metastatic GIST , and is also used for neoadjuvant and adjuvant therapy for localized GIST . Genetic mutational analysis used for the correct prescription of targeted therapy suggests that it is inappropriate to administer imatinib in patients with a mutation in the succinate dehydrogenase gene and D842V mutation in the platelet-derived growth factor gene. However, in different regions of the Russian Federation, such diagnostic procedure may not always be available for a number of technical reasons. The lack of response to therapy and, consequently, the progression of the disease, may be associated with a decrease in the therapeutic concentration of imatinib in the blood plasma. Determination of the concentration of active metabolites of imatinib in the serum allows timely identification of potential causes of insufficient response to therapy and individual correction of the dose of the drug.

Material and Methods.To assess a significance of the correlation between increasing/decreasing the dose of imatinib and achieving a therapeutic response, we used a laboratory high-performance liquid chromatography method to determine the concentration of imatinib in serum.

Conclusion.Determination of a decreased concentration of active metabolites of imatinib in plasma by high-performance liquid chromatography with detection of tandem mass spectrometry method in a patient with disseminated GIST allowed us to correct the dose of the drug and achieve a positive effect with a duration of 51 months (since the dose was increased). The method of high-performance liquid chromatography with the detection of the method of tandem mass spectrometry is not an absolute alternative to gene mutation analysis, however, it can be effectively used for correction of the dose of imatinib in patients with GIST.
THE ROLE OF EPITHELIAL-TO-MESENCHYMAL TRANSITION AND AUTOPHAGY IN ANTITUMORAL RESPONSE OF MELANOMA CELL LINES TO TARGET INHIBITION OF MEK AND mTOR KINASES
Authors: Ryabaya O. O. , Prokofieva A. A. , Khochenkov D. A. , Akasov R. A. , Burov S. V. , Markvicheva E. A. , Stepanova E. V.
Published: July 2019

Introduction. Cutaneous melanoma is a challenge to treat due to rapid progression of disease and acquired resistance to therapy. Autophagy and the epithelial-to-mesenchymal transition (EMT) are closely interrelated and play a key role in tumor progression. Targeted co-inhibition of MEK and mTOR kinases is a potential target for melanoma therapy by downregulatoin of the EMT.

Objective: to study the effect of MEK and mTOR co-inhibition on cell viability, ability to form 3D-spheroids and migratory capacity of melanoma cell lines, and correlation of these changes with EMTand autophagy-related markers.

Material and Methods. Melanoma cell lines Mel Z and Mel MTP were derived from patients, who were treated at the N.N. Blokhin National Medical Research Center of Oncology. The antiproliferative effect of binimetinib and/or rapamycin was studied by the MTT -test. 3D spheroids were formed using RGD peptides. Cell migration and invasion were assessed by a Boyden chamber migration assay. The expression levels of autophagy and EMT markers were investigated by immunocytochemistry or immunoblotting.

Results. Rapamycin increased cytotoxicity of binimetinib in both 2D and 3D melanoma cell line cultures. At the same time, binimetinib and rapamycin reduced invasion, but not migration capacity of melanoma cells in vitro. The effectiveness of the combination was associated with a decrease in the EMT markers (N-cadherin and β-catenin) and autophagy markers (Beclin 1, p62/SQST M1 and LC3BII ) in melanoma cells.

Conclusion. Inactivation of autophagy and EMT leads to overcoming the resistance to current anti-melanoma therapy and can be considered as a promising target for the treatment of melanoma.
PECULIARITIES OF THE FEASIBILITY STUDY FOR ON-GRID PHOTOVOLTAIC INSTALLATION OF PRIVATE HOUSEHOLD
Authors: Bodunov Vadim , Kulko Tetiana
Published: July 2019

The article is devoted to the development of alternative energy sources, in particular, on-grid photovoltaic installation of low power. The Ukrainian regulatory framework has created the prerequisites for the active development of this industry by a simplified system of interconnection sources of private households to the electrical power system and a high rate of «green» tariff for electricity for private households, producing electricity from solar energy. Similar tariffs are available in other countries, in particular in the countries of the European Union, under the name feed-in-tariffs, so private households can get paid for excess electricity that do not consume on their own households and sent into the grid. The article deals with the disadvantages of existing methods for estimating future profits from the sale of electric energy at a «green» tariff (feed-in tariff) and proposes a method for taking into account the technical limitations on normalized electricity quality indices. It is shown, that ignoring the technical limitations, concerning the level of voltage, leads to overestimating the calculated value of the generated electricity up to 33 %, that can grow due to the increase of payback period up to 1,5 times. The possibility of transforming the overage of unrealized electric energy into heat is also considered.
FEATURES OF CONSTRUCTION OF MUSICAL-AESTHETIC SPACE AS A COMPONENT OF THE CULTURAL - EDUCATIONAL SPACE OF A COMPREHENSIVE SCHOOL
Authors: Dobrovolska Rufina
Published: July 2019

There were analyzed the scientific ways for organization of the culture-educational space of a comprehensive school. The cultural-educational space model is presented as an integrity of spatial-semantic, meaningfully-methodic and communicative-organizational components. The basic directions of designing of development and structural components were identified. The attention was made on the specifics of pedagogical tasks, educationally-developing, extracurricular, leisure-developing environments. The features of the musical-aesthetic space as the components of the cultural-educational space of a comprehensive school where examined. It has structural elements such as: child individuality as the subject of education, different forms of activity; common principles of organization; new musical-educational technologies. New ways of musical-aesthetic space organization of general school were suggested. There were analyzed such principles of that space development as: sequence, systematic, purposefulness, pupil’s free choice of activity, optimal connection of different forms of teaching (frontal, group and individual), the positive emotional background formation. Educational functions of the musical-aesthetic space of general school were characterized. These are the spiritual and creative child individuality potential; compensation of its deficiency in child’s other life domains; upbringing of the aesthetic attitude toward music; positive emotional educational background creation. It was suggested, that professional training of future music teachers has to anticipate acquiring skills to master that space as well as purposeful using of its sources in the process of musical-aesthetic pupils upbringing realization.
ENTROPY CONDITIONS OF SELF-ORGANIZATION OF THE BANKING SYSTEM
Authors: Tkachuk Natalia , Buchkovskaya Yana
Published: July 2019

The conditions for market transformations are accompanied by a growing influence on the banks' activity by the flow of destructive disturbances that can cause chaotic behavior of the economic system as a whole and the banking system, in particular. The purpose of the study is to identify the preface of self-organization of the banking system, taking into account the information factor and the level of the entropy of the system. The theoretical questions of mutual influence and interconnection of entropy and information are considered in the paper, as well as their influence on the processes of self-organization in the banking system. From the point of view of the entropy approach the nature and conditions of self-organization in the banking system are disclosed. For the efficient functioning of the modern banking system, the search and analysis of the dependence between the entropy indicators, accumulated information and the synergistic effect, taking into account dualism of chaos and order, are of considerable interest. On the basis of the complex of these indicators, the results of the conducted research, which reveal the dynamic properties of self-organization of the banking system, are presented.
THE THEORY AND PRACTICE OF MANAGING STUDENTS’ INDEPENDENT STUDY ACTIVITIES VIA THE MODERN INFORMATION TECHNOLOGIES
Authors: Lavrentieva Olena , Tsys Oleh
Published: July 2019

Theoretical foundations and existent practical experience in providing scientifically grounded management of students' independent study activities with the use of the latest information technologies have been studied in the research. The issues of organization of various types of management of students' independent study activities have been considered. It has been reported, that there are direct, indirect, and dynamic types of management. The possibilities of ICTs in the implementation of each type of management the students' independent study activities have been shown. It has been taken into account, that the introduction of computer-oriented means of co-management and co-organization into the educational process reflects the realization student-centered concept of learning. There has been emphasized the need to use both direct and indirect types of management, which will make it possible for students to move to the position of an actor of independent study activity and capable of exercising self-government. The authors have been paid special attention to the means of developing the students' personality and forming their motivational readiness for independent study activities and self-education. It has been shown, that such necessary means include the following: to promote the development of students' self-organization, self-actualization, as well as their socialization, to encourage self-assessment and reflection throughout the process of organizing independent study activities; to personalize independent study activities, to offer personally and professionally meaningful learning tasks with clearly defined and understandable goals for a student, and to ensure their gradual complication; to create informative feedback; to strengthen students' motivation.
Relevance Feedback Utilizing Secure Evaluation with Content-based Image Retrieval in Cloud Computing
Authors: Panchal Sonali Sakhahari , Gaikwad Shital Y
Published: July 2019

Content-based image retrieval (CBIR) is the integrated system of the photograph fetching trouble for instance difficulty of chasing down pictures on a cloud in big datasets. To recognize request semantics and client’s needs if you want to grant submitted consequences with reference to exactness, relevance feedback is combined into CBIR shape. Important evaluation shape will manufacture the precision of yield and will pass at hugest yield. In the watermark-primarily based tradition, a singular watermark is explicitly inserted in blended photos by means of the cloud environment earlier than photos, transmitted towards inquiry mortal. In this way, when an illicit photograph reproduction is located, the illicit inquiry mortal, where appropriates can trail the pictures with the aid of the watermark extraction. Characteristics vectors get assured by using the secure hashing algorithm, analyzing and making ready age are used at image user’s aspect for confirmation motive. TPA (third party auditor) is used to understand enforcement or malevolent activities achieved in cloud circumstances. In our proposed framework, we are including the approach of misrepresentation recognition by generating trapdoor using a hashing calculation, as a document is made with the unique identifier and the client pictures with the names after the link are simplest, a trapdoor is generated.
Classroom Management Strategies and Student Learning
Authors: Kumar Mukul , Liu Ziqian
Published: July 2019

Great teachers build great institutions. The teachers who have been playing a central role in human learning and effective teaching are believed to be the shapers of society. Usually, the effectiveness of an instructor is measured on the basis of the performance of his pupil. There exist many factors which affect the performance of the class. Classroom management is one of the important factors which matters a lot in the process of student learning. Classroom management can be considered as an art which varies from teacher to teacher i.e. every teacher has a unique style of managing his class but still there exist some general classroom practices. In this article, the emphasis is given on some of the general classroom management practices, following which can enhance the effectiveness of student learning.
Dynamics of Seasonal Migration of Rural Livelihood: Capital Formation Perspective
Authors: Islam Muhaiminul , Kashem Sumaia , Morshed Shameem , Rahman Md. Mostafizur , Das Anutosh
Published: July 2019

Globally, farming communities migrates considering it as a livelihood strategy, especially given unprecedented environmental change. Because migration facilitates poverty reduction, education improvement, entrepreneurial investments and even the economic evolution of the origin areas. Farmers in the northern region of Bangladesh migrate during the slack season when farming activities are not up to the mark. Driven by this context, this study examined the principal actors, the pattern of seasonal migration in the context of seasonal variability and migration's role in food security and livelihood resilience in the Barind Tract, Bangladesh. The participatory rural appraisal was employed for collecting basic facts and information. The study suggests that poverty is the root cause of migration, such that men from poor households with small landholdings and high food insecurity migrate for work during the winter. Moreover, the traditional practice of sharecropping, which helped them reduce food shortages, has also become less profitable these days. Therefore, the tendency of migrating is likely to escalating among the people of this region, and those already relocated are planning to settle down there for a more extended period. Currently, such migrants are getting engaged in low-paying unskilled wage work, construction work mainly in Rajshahi city, Mohadevpur, and Dhaka the capital city of Bangladesh, which enables them to make not only modest savings but also hard enough to repay the debt their family has incurred during food shortages.
Diseño de un itinerario aumentado e interdisciplinar para la formación de maestros de educación primaria
Authors: San Pedro Veledo María Belén , Villalustre Martínez Lourdes , Herrero Vázquez Mónica
Published: July 2019

La Realidad aumentada (RA) configura un nuevo ambiente de aprendizaje más enriquecido, combinando contenidos físicos y digitales. Por ello, el objetivo de este trabajo se dirige al diseño de un itinerario didáctico interdisciplinar con RA destinado a estudiantes universitarios del Grado de Maestro en Educación Primaria. Así, haciendo uso de una estructura gamificada se presenta a los estudiantes un misterio que deben resolver a través de diferentes pistas y pruebas geolocalizadas de manera colaborativa e innovadora. Con todo, el itinerario propuesto pretende servir de guía a los futuros maestros/as de Educación Primaria como vehículo para promover la integración efectiva de las nuevas tecnologías y que dé respuesta a las necesidades de un alumnado cada vez más digitalizado.
Análisis de la motivación ante el uso de la realidad virtual en la enseñanza de la historia en futuros maestros
Authors: Cózar Gutiérrez Ramón , González-Calero Somoza José Antonio , Villena Taranilla Rafael , Merino Armero José Miguel
Published: July 2019

La Realidad Virtual está adquiriendo una gran relevancia en el ámbito educativo. Es necesario potenciar la formación de los futuros maestros en el uso de estas tecnologías emergentes que permiten mejorar los procesos de enseñanza-aprendizaje. Se presentan los resultados de un estudio sobre la motivación de 94 estudiantes del Grado de Maestro en Educación Primaria de la Facultad de Educación de Albacete (UCLM) que han participado en una actividad en la que, a través del uso de la Realidad Virtual como herramienta didáctica, han trabajado contenidos curriculares de Historia que deben enseñar en su futura práctica docente. Para medir la motivación se utilizó la adaptación del instrumento Instructional Material Motivational Survey (IMMS) de Keller (2010), elaborado por Loorbach, Peters, Karreman y Steehouder (2015). Los resultados muestran que tanto hombres como mujeres presentan una elevada motivación total (M = 5.16), sin diferencias significativas entre ellos en ninguna dimensión del modelo ARCS.
The shear characteristic and failure mechanism study of infilled rock joints with constant normal load
Authors: Cao Ping , Deng Huijuan , Chen Yu , Fu Ning
Published: July 2019

In order to evaluate the shear deformation characteristics, the direct shear tests for the rock-like specimens with regular sawtooth were carried out in the laboratory. The different asperity angles and different normal stress conditions were considered and the dilatancy characteristics and the corresponding failure modes were analyzed accordingly. The uncommon asperity angle of 25°, 40° and 55° have been selected to compare with the common angles, which can study the differences in detail. Studies show that when the normal stress keeps constant, the peak shear strength increases first and decreases with the increasing asperity angle afterwards. It is because the force causing sawtooth damage under tensile failure is less than the force under shear failure. When the asperity angle keeps constant, the greater the normal stress, the greater the peak shear strength. The larger the normal displacement of dilatancy angle and dilatancy are caused by larger asperity angle. According to the verification, the test results are in good agreement with the analytical results. It should be noted that the analytical results presented locate below the test result curves, which is due to the small values of c and m in the formula. The sliding failure is usually induced when the asperity angle or the normal stress is small. On the contrary, the tensile damage normally occurs while the asperity angle is large enough.
Discussion on stability analysis and support technology of surrounding rock of gob-side entry retaining
Authors: Zheng Wenxiang , Duan Huiqiang
Published: July 2019

In order to further analyze the stability and control mechanism of surrounding rock in the gob-side entry retaining, the slip instability coefficient k1 and compression failure coefficient k2 are proposed by the mechanical analysis of the established filling body mechanics model, and when both k1 and k2 are less than 1, the roadside filling body can keep stable. The mechanical model of main roof is analyzed by the static equilibrium method, and the formula for calculating the maximum roof subsidence is deduced. Based on the data of haulage gateway of No. 21201 coal face of Juncheng Coal Mine, using the formula to calculate the amount of roof subsidence at the junction point of filling body and the roof, and proposes two methods to reduce roadway floor heave by increasing the roadside filling width and transferring the surrounding rock stress to the gob. Finally, the corresponding surrounding rock control technology is proposed according to the surrounding rock deformation characteristics during roadway excavation, roadway retention and roadway reuse, and then carries out field monitoring and evaluation. The results show that after adopting the corresponding supporting technology, the surrounding rock of the gob-side entry retaining has been effectively controlled from the excavation to the reuse period with the coal face advancing, the roof-to-floor convergence of roadway solid coal side is less than 220 mm, the roof-to-floor convergence of filling body side is less than 280 mm, and the convergence on the both sides of the roadway is about 190 mm. At the same time, the calculated roof subsidence with the junction point of filling body and the roof is similar to the field monitoring results, which achieves the expected control effect, and the research contents provides a certain reference for the support technology of the gob-side entry retaining.
Analyzing dynamic disturbance fragmentation mechanism of surrounding rock in roadway roof
Authors: Gu Hongfei , Li Qingfeng , Peng Yuejin , Huang Qiyun , Yang Jianan
Published: July 2019

In this paper, a numerical simulation is conducted to analyze an engineering practice pertaining to the in panel 2347, the discussion is focused on the following aspects: the influence of fault mining activation on fragmentation of surrounding rock in roof, surrounding rock failure of unsupported roadway under static load alone, surrounding rock failure of unsupported roadway under dynamic load and static load combination, damage of surrounding rock in supporting roadway under dynamic load and static load combination. The results show that, for the roadway surrounding rock with obvious dynamic disturbance, the compressive stress value can eliminate the influence of the tensile stress wave generated by the reflection of the compressive stress disturbance wave on the roadway wall. In the roadway support, it should provide a certain compressive stress to the surrounding rock of the surrounding roadway wall. An anchor support surrounding rock can significantly inhibit the tensile crack, shear the crack expansion and dislocation slip of coal gang, and it can also alleviate the tensile, compressive and shear failure of the roof carbonaceous mudstone. Because the dynamic load has a significant damage to the carbonaceous mudstone between roof anchors, it is necessary to reduce the anchor spacing and row spacing or enhance the stiffness and active stress of the protective surface member.
Analysis of overburden layer thickness influence on dynamic response of concrete face rock-fill dam
Authors: Peng Xue-feng , Zhu Ya-lin , Tan Kun , Ma Chi
Published: July 2019

In the past, when performing dynamic response analysis of dams on deep overburden, the dam body and the overburden have often been discussed separately. In this paper, the overburden and the dam body are considered as a whole, and the dynamic response analysis is carried out by using a completely nonlinear dynamic analysis method. From the acceleration of the earth’s surface, the displacement of the dam, and the stress distribution of the panel, the dynamic response of the structure is shown to increase first and then decrease with increasing cover thickness, and the overburden layer thickness corresponding to the extreme point is called the critical thickness. The results obtained in this study can provide a design basis for a face rock-fill dam built on a deep overburden layer.
Numerical investigation on rules of fracture propagation during hydraulic fracturing in heterogeneous coal-rock mass
Authors: Yuan Zhigang , Shao Yaohua , Xie Donghai , Huang Fei
Published: July 2019

To investigate rules of fracture propagation during hydraulic fracturing in heterogeneous coal-rock mass, a new mathematical model for hydraulic fracturing with seepage-damage coupling and its numerical algorithm are proposed. The rules of coal-rock mass heterogeneity, confining pressure, beforehand hydraulic slotting, and non-symmetric pressure gradient on fracture propagation are investigated. Numerical results show the following: (1) Compared to homogeneous coal-rock mass, the fracture propagation pattern exhibits a more zig-zag characteristic and the fracture initiation pressure is reduced in heterogeneous coal-rock mass. (2) Fracture propagation during borehole fracturing is mainly controlled by confining pressure ratio, and the fracture would propagate along the path with least resistance in coal-rock mass. (3) During hydraulic fracturing with beforehand hydraulic slotting, fracture propagation pattern would become more complex with slotting length increasing; the propagation direction of fracture is primarily controlled by principal stress difference, the larger of principal stress difference, the more difficult of oriented fracturing. (4) Non-symmetric pressure gradient can reduce breakdown pressure and influence fracture propagation pattern, which provides a beneficial guide for oriented fracturing. The simulation results are consistent with the theoretical solutions and experimental observations, which is promising to guide field operation of hydraulic fracturing to improve coalbed methane extraction.
Study on creep mechanism of coral sand based on particle breakage evolution law
Authors: Chen Bin , Chao Daijie , Wu Wenjuan , Hu Jieming
Published: July 2019

The time-dependent deformation property of backfill coral sand is of great important to the long-term stability of engineer facilities bulit on reefs and reclaimed land. In order to investigate the long-term deformation behavior, one-dimensional compression creep tests under different constant stresses were carried out for coral sand taken from a reef in the South China Sea by WG type high-pressure consolidation instrument. The test results show that under the action of constant stress, coral sand has a strong deformation timeliness and shows remarkable nonlinear attenuation creep characteristics. The creep of coral sand has obvious stages and has gone through three stages of instantaneous deformation, accelerated deformation and slow deformation phase tending to stability. The relationship of strain-time can be fitted with power function in mathematic. The particle breakage state of any single particle size group of coral sand after creep can be well described by using the two-parameter Weibull distribution function, Weibull parameters a and b have a good exponential relationship with stress, and have a negative linear relation with quantitative index Br of particle breakage, and have a negatively correlated with final total strain. Under the action of low stress level, the main cause of creep deformation is the movement and recombination of particles. At low stress level, the movement and recombination of particles are the main reason of creep deformation, while at high stress level, the slippage and filling pores of broken coral sand particles are the main reason of creep deformation.
Optimization calculation of stope structure parameters based on Mathews stabilization graph method
Authors: Kang Zhao , Qing Wang , Qiang Li , Yajing Yan , Xiang Yu , Junqiang Wang , Shuai Cao
Published: July 2019

Mathews stability graphic method, based on the rock classification system, measures the stability of the ore roof area of a relatively simple calculation method and provides a theoretical basis for mine rational design stope structure size parameters. In this study, we used a large-scale tungsten mine in Jiangxi Province as the engineering background and performed on-site engineering geological surveys and indoor ore rock mechanics tests in the middle section of mine 417 to obtain multiple engineering quality indicators for the mines and surrounding rocks. The Mathews stability map method and Barton limit span theory were used. The reasonable size range of the exposed face of the stope was calculated by performing theoretical analysis on the ultimate span. Then, FLAC3D calculation and analysis software were used for the simulation of the stope structure, and the most reasonable design of the exposed surface dimension was selected and used as reference for ensuring the safe production of the mine.
Study on vibration characteristics of rolling mill based on vibration absorber
Authors: Jiang Jialei , Liu Shuang , Liu Bin , Wang Yinghui , Lu Huifeng
Published: July 2019

The vertical vibration often occurs during the rolling production, which has an influence on the accuracy of rolling mill. In order to effectively suppress the vertical vibration of the rolling equipment, the rolling mill model with vibration absorber device was established. Based on the main resonance singularity of the rolling mill system, the best combination of opening parameters was obtained. The best combination of opening parameters helps the rolling mill system work in a stable area. Finally, the effects of different vibration absorber parameters on the vibration characteristics of the rolling mill system were analyzed. Results show that the vibration absorber device can effectively improve the stability of the rolling mill system.