A rational method for determining intermittency in the transitional boundary layer

A new rational procedure is proposed for determining the intermittency in the streamwise direction. One of the key parameters for the intermittency determination is the selection of a threshold value, which often involves a certain level of subjectivity. Here, a reliable way of choosing the threshold value in a more objective manner is proposed. The proposed approach involves a single threshold value, equal to the magnitude of the maximum laminar perturbation in the transitional flow. The results obtained are validated with the widely used dual-slope method. In this paper, the measurements are carried out on an experimental arrangement, involving the interaction of an upstream aerofoil wake with a downstream flat plate boundary layer. As a by-product of the study, a scaling parameter has been identified which captures the length of the transition zone as the proximity of the aerofoil in the wall-normal direction is varied

Aeration-destratification of Lake Eureka Using a Low Energy Destratifier

published or submitted for publicationis peer reviewedOpe

What’s new for the clinician– summaries of recently published papers

Type 2 diabetes mellitus (T2DM) is the most common chronic disease in the Western world and developing countries have also shown an explosion in the incidence and prevalence of this disease. Exercise therapy is essential for the management of diabetes. The American College of Sports Medicine and the American Diabetes Association have recommended at least 150 min/week of moderate (50%-70% of an individual’s maximum heart rate) to vigorous (> 70% of an individual’s maximum heart rate) physical activity for patients with type 2 diabetes (T2DM). Studies including lifestyle and health interventions have shown that they have a positive health effect on patients with T2DM. For example, physical activity has been shown to improve the metabolic condition of T2DM patients, reduce HbA1c levels and cardiovascular mortality, and improve the quality of life, lipid levels, and blood pressure. Diabetes has been identified as an important risk factor for periodontitis. The risk of developing periodontitis and peri-implantitis is significantly increased in patients with diabetes compared to healthy control groups. Wernicke and colleagues (2021)1 reported on a trial that sought to test the hypothesis that physical activity is a health-promoting measure with significant positive effects on periodontal health and HbA1c concentrations

What's new for the clinician? - Excerpts from and summaries of recently published papers

0.5% versus 3% sodium hypochlorite (NaOCl) in root canal treatment: A quasi-randomized controlled trial/ C Ulin, M Magunacelaya-Barria, G Dahlén, T Kvist. Immediate clinical and microbiological evaluation of the effectiveness of 0.5% versus 3% sodium hypochlorite in root canal treatment: A quasi-randomized controlled trial. International Endodontic Journal 2020; 53(5): 591-603. The effect of an intraorifice barrier and base under coronal restorations on the healing of apical periodontitis: A randomized controlled trial G Kumar, S Tewari, P Sangwan, J Duhan, S Mittal. The effect of an intraorifice barrier and base under coronal restorations on the healing of apical periodontitis: A randomized controlled trial. International Endodontic Journal 2020; 53 (4): 298-307

What’s new for the clinician? - Excerpts from and summaries of recently published papers

0.5% versus 3% sodium hypochlorite (NaOCl) in root canal treatment: A quasi-randomized controlled trial/ C Ulin, M Magunacelaya-Barria, G Dahlén, T Kvist. Immediate clinical and microbiological evaluation of the effectiveness of 0.5% versus 3% sodium hypochlorite in root canal treatment: A quasi-randomized controlled trial. International Endodontic Journal 2020; 53(5): 591-603. The effect of an intraorifice barrier and base under coronal restorations on the healing of apical periodontitis: A randomized controlled trial G Kumar, S Tewari, P Sangwan, J Duhan, S Mittal. The effect of an intraorifice barrier and base under coronal restorations on the healing of apical periodontitis: A randomized controlled trial. International Endodontic Journal 2020; 53 (4): 298-307

What’s new for the clinician? - Excerpts from and summaries of recently published papers

Endodontic files are used to remove intracanal pulpal tissues, microbial biofilm, and toxic by-products and to develop a continuously tapering canal while maintaining the canal geometry that ultimately allows for the delivery of irrigating solutions and intracanal medicaments as well as the three-dimensional filling of the root canal system. Historically, stainless steel hand files have been used to perform canal shaping. However, these files are stiff and associated with increased operator fatigue, and when used in the preparation of curved root canals, the restoring forces of the files tend to return the file back to its original shape, resulting in canal transportation

What's new for the clinician? - Excerpts from and summaries of recently published papers

1. Is there an association between stress and periodontitis? JM Coelho, SS Miranda, SS da Cruz, et al. Is there association between stress and periodontitis? Clinical Oral Investigations. 2020; 24: 2285-94. 2. Is there an association between periodontitis and all-cause and cancer mortality? P Chung, T Chan. Association between periodontitis and all-cause and cancer mortality: retrospective elderly community cohort study. BMC Oral Health. 2020; 20: 168

What’s new for the clinician – summaries of recently published papers (September 2021)

It is estimated that 621 million children throughout the world have untreated caries on primary teeth. 1 Early childhood caries (ECC), which affects preschool children, progresses rapidly and is associated with pain, difficulty chewing, weight loss, difficulty sleeping, altered behaviour, and a poorer quality of life for affected children and theirfamilies. Children with dental caries have greater treatmentneed, which is expensive and not readily accessible in most developing countries. In South Africa, ECC is a major public health problem with caries rates among children as high as 70% in some provinces