Strata Movement of the Thick Loose Layer under Strip-Filling Mining Method: A Case Study

Filling mining plays an important role in controlling surface subsidence. To study the movement of overburdened rock in filling mining under thick loose layers, a numerical simulation combing field measurement in CT30101 working face in the Mahuangliang coal mine was tested. The results show that different filling rates and filling body strength have different influences on roof and surface movement. The filling rate has a greater impact, which is the main control factor. The filling stress and roof tensile stress decrease gradually with roadway filling. The filling body stress and roof tensile stress in the first and second rounds are far greater than in the fourth round. After the completion of filling, the first and second round of filling bodies mainly bear the overburden, and the total deformation of the surrounding rock of the main transport roadway is very small, and therefore the displacement of the overburdened rock is controllable. The field monitoring results also show that the overburdened rock became stable after several fillings rounds. Combing the numerical modeling and field tests results, this study can be a guideline for similar geological conditions especially for coal mining under thick loose layers and thin bedrock.

Gulf-Iran diplomatic breakthroughs will be piecemeal

Significance He declined to confirm reports of a Saudi visit preparing to reopen diplomatic facilities closed in 2016, pending further progress. A fourth round of negotiations between Saudi and Iranian officials convened in September in the aftermath of the Baghdad Conference for Cooperation and Partnership which gathered regional leaders on August 28. Impacts Discounting the prospect of a breakthrough in US-Iran nuclear relations, regional officials will act more independently. Developments in Yemen are likely to undermine the Saudi-Emirati conviction that the Huthis are merely a proxy beholden to Iran. Foreign policy drift in the Biden administration may intensify as US political energy turns toward the 2022 congressional midterm elections.

The Effect of Sustainability on New Product Development in Manufacturing—Internal and External Practices

The purpose of this paper is to analyse the link between the adoption of sustainability practices and new product development (NPD) in manufacturing companies. From a triple bottom line (TBL) perspective and considering different theoretical approaches, this study hypothesises on the effect of both internal and external sustainability practices, distinguishing between collaborative and controlling initiatives, on the success of new products. Using a unique database of 281 companies across three industries taken from the fourth round of the High-Performance Manufacturing project, the findings shows that both monitoring and collaborative actions with suppliers demonstrate positive impacts on NPD success. Internal sustainability practices do not have a direct effect on NPD success but are determinant in supporting external sustainability practices.

Evolution of antibodies against SARS-CoV-2 over seven months: experience of the Nationwide Seroprevalence ENE-COVID Study in Spain

ObjectivesTo analyse temporal trends in SARS-CoV-2 anti-nucleocapsid IgG throughout the four rounds of the nationwide seroepidemiologic study ENE-COVID (April-November 2020), and to compare the fourth-round results of two immunoassays detecting antibodies against nucleocapsid and to S protein receptor-binding domain (RBD).MethodsA chemiluminescent microparticle immunoassay (CMIA) was offered to all participants in the first three rounds (Abbott; anti-nucleocapsid IgG). In the fourth round we offered this test and a chemiluminescence immunoassay (CLIA) (Beckman; anti-RBD IgG) to i) a randomly selected sub-cohort, ii) participants who were IgG-positive in any of the three first rounds; and iii) participants who were IgG-positive in the fourth round by point-of-care immunochromatography.ResultsImmunoassays involving 10,153 participants (82.2% of people invited to donate samples) were performed in the fourth round. A total of 2595 participants (35.1% of participants with immunoassay results in the four rounds) were positive for anti-nucleocapsid IgG in at least one round. Anti-nucleocapsid IgG became undetectable in 43.3% of participants with positive first-round results. Pneumonia was more frequent in participants with anti-nucleocapsid IgG in all four rounds (11.2%) than those in which IgG became undetectable (2.4%).In fourth round, anti-nucleocapsid and anti-RBD IgG were detected in 5.5% and 5.4% participants of the randomly selected sub-cohort, and in 26.6% and 25.9% participants with at least one previous positive result, respectively. Agreement between techniques was 90.3% (kappa: 0.72).ConclusionsThe response of IgG to SARS-CoV-2 is heterogeneous and conditioned by infection severity. A substantial proportion of the SARS-CoV-2 infected population may have negative serologic results in the post-infection months.

Biostatistical investigation of correlation between breastfeeding and obesity

Breastfeeding is a classic aspect of health, which has benefits for both children and mothers in the long and short terms. In Europe, the obesity epidemic for children becomes an urgent problem needed to be solved. Recent research indicates that prolonging breastfeeding time would reduce the proportion of obesity and overweight. Breastfeeding has been seen as a protective factor. In this article, we make a secondary analysis of the data from several European countries in the WHO European Childhood Obesity Surveillance Initiative (COSI) to study the correlation between breastfeeding and obesity. This survey is the fourth round. The result shows that there is a positive correlation between breastfeeding and obesity.

Israel heads for a fourth round of elections

Headline ISRAEL: A failed vote launches a fourth round of polls

Which Contraceptive Methods are Used for Stopping Childbearing in India? Levels, Patterns and Determinants

Background: This study aims to examine patterns and socio-economic correlates of using contraceptives for limiting childbirths in India. Methods: The study is based on data from the fourth round of the National Family Health Survey considering 339,537 currently married, non-pregnant and fecund women. Bivariate and three separate binary logistic regression model were carried out to accomplish the research objectives. Results: Most of the women stated to postpone their childrearing after age 25 years and after achieved children 2 or more in India. Still, 13.5% women were not using any contraceptive to satisfy their demand for postpone childbearing and 8% women were using traditional contraceptive to postpone their childbearing and using traditional contraceptive to postpone childrearing was higher among women aged 15-19 years, illiterate, poor, Muslims and belong from central and northeast region. Women’s age, parity, year of schooling, wealth status, religion, caste, mass media and region found to be strong determinants of met need for limiting childbearing and using traditional contraceptives in India. Conclusion: The met need for demand of spacing methods was fur lagging to desire goals of SDG-3.7.The government should needs to focus on women with high unmet need for limiting and use traditional methods for limiting.

Which Contraceptive Methods Are Used for Stopping Childbearing in India? Levels, Patterns and Determinants

Background: This study aims to examine patterns and socio-economic correlates of using contraceptives for limiting childbirths in India. Methods: The study is based on data from the fourth round of the National Family Health Survey considering 339,537 currently married, non-pregnant and fecund women. Bivariate and three separate binary logistic regression model were carried out to accomplish the research objectives. Results: Most of the women stated to postpone their childrearing after age 25 years and after achieved children 2 or more in India. Still, 13.5% women were not using any contraceptive to satisfy their demand for postpone childbearing and 8% women were using traditional contraceptive to postpone their childbearing and using traditional contraceptive to postpone childrearing was higher among women aged 15-19 years, illiterate, poor, Muslims and belong from central and northeast region. Women’s age, parity, year of schooling, wealth status, religion, caste, mass media and region found to be strong determinants of met need for limiting childbearing and using traditional contraceptives in India. Conclusion: The met need for demand of spacing methods was fur lagging to desire goals of SDG-3.7.The government should needs to focus on women with high unmet need for limiting and use traditional methods for limiting.