Effects of heat treatment on the properties of low carbon steel 19MnB4 for screws

In this paper is given the research conducted at the specified quality screws which had different mechanical properties after completion of the same heat treatment. Results of chemical and metallographic analysis and hardness tests indicated the deficiencies that can be corrected in the course of production and thermal processing of finished products - screws

Effects of heat treatment on the properties of low carbon steel 19MnB4 for screws

In this paper is given the research conducted at the specified quality screws which had different mechanical properties after completion of the same heat treatment. Results of chemical and metallographic analysis and hardness tests indicated the deficiencies that can be corrected in the course of production and thermal processing of finished products - screws

Household, community, sub-national and country-level predictors of primary cooking fuel switching in nine countries from the PURE study

Introduction. Switchingfrom polluting (e.g. wood, crop waste, coal)to clean (e.g. gas, electricity) cooking fuels can reduce household air pollution exposures and climate-forcing emissions.While studies have evaluated specific interventions and assessed fuel-switching in repeated cross-sectional surveys, the role of different multilevel factors in household fuel switching, outside of interventions and across diverse community settings, is not well understood. Methods.We examined longitudinal survey data from 24 172 households in 177 rural communities across nine countries within the Prospective Urban and Rural Epidemiology study.We assessed household-level primary cooking fuel switching during a median of 10 years offollow up (∼2005–2015).We used hierarchical logistic regression models to examine the relative importance of household, community, sub-national and national-level factors contributing to primary fuel switching. Results. One-half of study households(12 369)reported changing their primary cookingfuels between baseline andfollow up surveys. Of these, 61% (7582) switchedfrom polluting (wood, dung, agricultural waste, charcoal, coal, kerosene)to clean (gas, electricity)fuels, 26% (3109)switched between different polluting fuels, 10% (1164)switched from clean to polluting fuels and 3% (522)switched between different clean fuels

The influence of high-resolution wind forcing on the power input to near-inertial waves in the ocean

The wind power input to near-inertial (NI) motions is studied using a global eddy-permitting ocean general circulation model. The model is forced by high- (1-hourly, at 0.35° resolution) and low-resolution (6-hourly, at 1.875° resolution) wind data. A change from low- to high-resolution forcing results in an increase in NI kinetic energy by a factor three and raises the wind-generated power input to NI motions from 0.3 TW to 1.1 TW. Time and space filtering of the wind fields yield less kinetic energy, with a larger drop from time filtering. This strong sensitivity to wind forcing points to a possible underestimation of the wind-generated energy available for deep ocean mixing in previous studies based on low-resolution winds

Social Entrepreneurship as a Force for More Inclusive and Innovative Societies: Cross-Country Report

Between April 2015 and December 2015, the SEFOR\ucfS consortium surveyed over 1000 social enterprises in Hungary, Romania, Spain, Portugal, Germany, Sweden, the United Kingdom, Russia and China. This means that thanks to the diligent cooperation of social enterprises and funding from the European Union, we have been able to launch the world\u2019s largest and most rigorous panel database on social enterprises. This report presents key findings for all the countries investigated. Where possible, we compare findings to the 2009 SELUSI survey, the predecessor of the SEFORIS project. The SEFOR\ucfS database is unique in its scope and depth. In our conversations with social entrepreneurs, we discussed in detail topics, ranging from their innovation habits to their perceptions of the market in which they operate. It is also unique in its methodology \u2013 we adopted a special type of snowball sampling method, called respondent driven sampling, which allowed us to survey a representative sample of social enterprises in each country through tapping into their networks. Finally, our database is unique in its rigor as we took meticulous steps to ensure highest data quality. This report is designed to help social entrepreneurs benchmark their organisation against fellow social enterprises worldwide. We hope the report can help social enterprises to better place their organisation (e.g. what makes it distinct; readily spot differences and similarities with their peers). The report will also be useful for support organisations and policy makers to obtain an overview of social enterprises across 9 countries

Immature Sacrococcygeal Teratoma with Microfoci of Yolk Sac Tumor in a Preterm Female NewbornIs the Surgical Resection Enough?

Sacrococcygeal teratoma (SCT) is the most common neoplasm in neonates and the most common germ cell tumor in children. SCT with malignant elements is very rare in infants. Prenatal diagnosis is of exceptional importance for the adequate fetal intervention, evaluation of perinatal complications and the selection of the optimal treatment. The treatment of choice is complete surgical resection. Postsurgical approach for immature teratoma with malignant elements is not well established. Considering the risk for tumor recurrence, long term follow-up is mandatory. We report clinical, laboratory, radiological and histological findings, surgical procedure, and follow-up in the preterm female neonate with immature SCT with malignant elements

Optimization of ultrasound assisted extraction of functional ingredients from Stevia rebaudiana Bertoni leaves

The aim of the present study was to reveal an effective extraction procedure for maximization of the yield of steviol glycosides and total phenolic compounds as well as antioxidant activity in stevia extracts. Ultrasound assisted extraction was compared with conventional solvent extraction. The exami-ned solvents were water (100ºC/24 h) and 70% ethanol (at 70°C for 30 min). Qualitative and quantitative analyses of steviol glycosides in the extracts obtained were performed using high performance liquid chromatography. Total phenolic compounds, flavonoids, and radical scavenging capacity by 2, 2-azino-di-3-ethylbenzothialozine-sulphonic acid) assay were also determined. The highest content of steviol glycosides, total phenolic compounds, and flavonoids in stevia extracts were obtained when ultrasound assisted extraction was used. The antioxidant activity of the extracts was correlated with the total amount of phenolic compounds. The results indicated that the examined sonication parameters represented as the probe diameter (7 and 22 mm) and treatment time (2, 4, 6, 8, and 10 min) significantly contributed to the yield of steviol glycosides, total phenolic compounds, and flavonoids. The optimum conditions for the maximum yield of steviol glycosides, total phenolic compounds, and flavonoids were as follows: extraction time 10 min, probe diameter 22 mm, and temperature 81.2oC