First Intervention Research Articles

Effect of secondary intervention on recognition accuracy of coal and gangue with small gray difference

Liquid intervention is an effective method for improving the coal/gangue recognition accuracy in longwall top coal caving mining, especially for coal and gangue with small gray difference. In this study, the influence of the Secondary Intervention (SI) on the accuracy of coal/gangue recognition is considered, and a series of experiments of coal/gangue recognition with First Intervention (FI) and SI were carried out. The results showed that with the increasing water volume, the temperature difference between coal and gangue under FI is far greater than that under SI. It is concluded that the “subtract background + binarization” image processing method is the best, and its average recognition accuracy under FI reaches 92.41%, and that of SI is 82.44%. Moreover, the liquid volume of SI needs to be reasonably selected to achieve high recognition accuracy for coal and gangue with small gray difference.

Reducing screen-time and unhealthy snacking in 9\u201311\u2009year old children: the Kids FIRST pilot randomised controlled trial

BackgroundMany young people form unhealthy behavioural habits, such as low intake of fruit and vegetables, high intake of energy-dense snack foods, and excessive sedentary screen-based behaviours. However, there is a shortage of parent-and home-focused interventions to change multiple health behaviours in children.MethodsKids FIRST was a 12-week, home- and school-based pilot randomised controlled trial to reduce screen-time and unhealthy snacking with assessments at pre- (baseline) and post-intervention. Four UK schools were randomised to control or one of three interventions targeting reductions in (1) screen-time and unhealthy snacking (ST + Sn), (2) screen-time (ST only), (3) unhealthy snacking (Sn only), and parents with children aged 9–11 years were recruited via schools. Intervention group parents received four online ‘sessions’ and four packages of resources tailored to each group. Children received four 30-min lessons during school time. Children and parents reported their own screen-time behaviours, children reported their own snacking behaviours. Descriptive analyses were undertaken using principles of intention to treat.ResultsInitial feasibility was shown in that this study successfully recruited schools and families into all four study arms and retained them over a period of 13 weeks (retention rate ≥ 74%). Seventy-five children and 64 parents provided full baseline questionnaire data. Reductions in children’s school day and weekend day TV/DVD viewing and computer game use were found in the ST + Sn and ST groups, while self-reported smartphone use increased in these groups. Similar results were found for parents’ TV/DVD, computer and smartphone use in these groups. Little to no changes were found in reports of the dietary variables assessed in any intervention group for children or parents.ConclusionsThese preliminary findings show some promise for the Kids FIRST intervention. Based on these findings, a future full trial should recruit a more diverse sample of families and optimise the intervention and intervention resources to more fully engage parents with the dietary-based components of the intervention programme, where fewer changes were seen. Although most parents reporting receiving the intervention resources, further development work is required to achieve higher levels of engagement. This might include greater parent and child engagement work early in the development of the project.Trial registrationRetrospectively registered in June 21st 2019 with ClinicalTrials.gov (number NCT03993652).

A pilot, family-based randomised controlled trial to reduce screen time and unhealthy snacking in children and their parents: Kids FIRST

A pilot, family-based randomised controlled trial to reduce screen time and unhealthy snacking in children and their parents: Kids FIRST

Necrosis cutánea por tratamiento anticoagulante oral: Caso clínico

Cutaneous necrosis caused by acenocumarol. Case report Cutaneous necrosis is a rare but serious complication, among patients treated with warfarin or aceno- cumarol derivatives. We report a 71 years old female with a history of deep venous thrombosis, receiving acenocumarol for three months. The treatment was discontinued, but had to be restarted, due to a new episode of thrombosis. Three days after restarting acenocumarol, the patient consulted for ecchymosis and pain of the right foot. At physical examination, there was distal cyanosis and absence of distal pulses. The patient was subjected to an embolectomy with the suspicion of an acute arterial occlusion, but no emboli were found. Due to the possibility of a cutaneous necrosis caused by Acenocumarol, the medication is discontinued. The cutaneous lesions progressed and eight days after the failed embolectomy, a gangrene of the right foot was diagnosed. The patient did not accept amputation dying fourteen days after the fi rst intervention.