Elimination of leakage in GaN-on-diamond

The use of chemical vapor deposition diamond as a substrate for gallium nitride (GaN) to form GaN- on-diamond has the potential to allow for higher linear power densities in GaN high electron mobility transistors (HEMTs). The increase in GaN HEMT power density on diamond has been limited to date by the electrical leakage in GaN-on-diamond substrates. In this paper we show that to eliminate buffer leakage in silicon based GaN-on- diamond, you have to completely remove the transition layers used to grow high quality GaN on the original host silicon. By completely removing the transition layers in GaN-on-diamond, we demonstrated buffer leakage comparable to the leakage in GaN on silicon carbide

SJS/TEN 2019: From Science to Translation

Stevens-Johnson syndrome and toxic epidermal necrolysis (SJS/TEN) are potentially life-threatening, immune-mediated adverse reactions characterized by widespread erythema, epidermal necrosis, and detachment of skin and mucosa. Efforts to grow and develop functional international collaborations and a multidisciplinary interactive network focusing on SJS/TEN as an uncommon but high burden disease will be necessary to improve efforts in prevention, early diagnosis and improved acute and long-term management. SJS/TEN 2019: From Science to Translation was a 1.5-day scientific program held April 26-27, 2019, in Vancouver, Canada. The meeting successfully engaged clinicians, researchers, and patients and conducted many productive discussions on research and patient care needs

The Cholecystectomy As A Day Case (CAAD) Score: A Validated Score of Preoperative Predictors of Successful Day-Case Cholecystectomy Using the CholeS Data Set

Background Day-case surgery is associated with significant patient and cost benefits. However, only 43% of cholecystectomy patients are discharged home the same day. One hypothesis is day-case cholecystectomy rates, defined as patients discharged the same day as their operation, may be improved by better assessment of patients using standard preoperative variables. Methods Data were extracted from a prospectively collected data set of cholecystectomy patients from 166 UK and Irish hospitals (CholeS). Cholecystectomies performed as elective procedures were divided into main (75%) and validation (25%) data sets. Preoperative predictors were identified, and a risk score of failed day case was devised using multivariate logistic regression. Receiver operating curve analysis was used to validate the score in the validation data set. Results Of the 7426 elective cholecystectomies performed, 49% of these were discharged home the same day. Same-day discharge following cholecystectomy was less likely with older patients (OR 0.18, 95% CI 0.15–0.23), higher ASA scores (OR 0.19, 95% CI 0.15–0.23), complicated cholelithiasis (OR 0.38, 95% CI 0.31 to 0.48), male gender (OR 0.66, 95% CI 0.58–0.74), previous acute gallstone-related admissions (OR 0.54, 95% CI 0.48–0.60) and preoperative endoscopic intervention (OR 0.40, 95% CI 0.34–0.47). The CAAD score was developed using these variables. When applied to the validation subgroup, a CAAD score of ≤5 was associated with 80.8% successful day-case cholecystectomy compared with 19.2% associated with a CAAD score >5 (p < 0.001). Conclusions The CAAD score which utilises data readily available from clinic letters and electronic sources can predict same-day discharges following cholecystectomy

Becoming a leader: A co-produced autoethnographic exploration of situated learning of leadership practice

The article examines the development of situated leadership practice through an autoethnographic study of the first three months of being in the role of a chief operating officer. The argument for using an autoethnographic approach is in response to the dearth of in-depth research on the development of leadership practice from a relational, social and situated perspective. The article makes a contribution to management learning by exploring aspects of situated curriculum within a manager’s legitimate participation influencing the development of situated leadership practice

Loneliness and quality of life after head and neck cancer

Loneliness is associated with a poor quality of life, mental illness, poor physical health, and premature mortality. Patients with head and neck cancer (HNC) are at risk of loneliness because of the effects of the disease and its treatment on important social interactive functions such as appearance, speech, facial expression, and eating. Patients treated for primary squamous cell HNC between January 2015 and December 2016 were surveyed in early 2019 using the University of Washington quality of life questionnaire version 4, the Cancer-related Loneliness Assessment Tool (C-LAT), and four nationally recommended indicator questions. The survey comprised 140 patients, with a mean (standard deviation) age at diagnosis of 63 (11) years. Tumour sites were oropharyngeal (42%), oral (35%), laryngeal (14%), and elsewhere (9%). In response to the question “How often do you feel lonely?” three-quarters said “hardly ever” and only 6% “often”. Similar responses were obtained for the other three indicator questions. It is encouraging that a relatively small proportion had serious issues with loneliness. Similarly, responses to the C-LAT suggested that one-quarter had feelings of loneliness and a minority had serious problems. Patients who were younger, who lived in more deprived circumstances, who had advanced disease and had been treated with chemotherapy or radiotherapy reported greater levels of loneliness. Loneliness was associated with a worse overall quality of life, and worse physical and social-emotional function. Lonely patients need to be identified as early as possible so that support and interventions can be implemented and outcomes improved

Loneliness and quality of life after head and neck cancer

Loneliness is associated with a poor quality of life, mental illness, poor physical health, and premature mortality. Patients with head and neck cancer (HNC) are at risk of loneliness because of the effects of the disease and its treatment on important social interactive functions such as appearance, speech, facial expression, and eating. Patients treated for primary squamous cell HNC between January 2015 and December 2016 were surveyed in early 2019 using the University of Washington quality of life questionnaire version 4, the Cancer-related Loneliness Assessment Tool (C-LAT), and four nationally recommended indicator questions. The survey comprised 140 patients, with a mean (standard deviation) age at diagnosis of 63 (11) years. Tumour sites were oropharyngeal (42%), oral (35%), laryngeal (14%), and elsewhere (9%). In response to the question “How often do you feel lonely?” three-quarters said “hardly ever” and only 6% “often”. Similar responses were obtained for the other three indicator questions. It is encouraging that a relatively small proportion had serious issues with loneliness. Similarly, responses to the C-LAT suggested that one-quarter had feelings of loneliness and a minority had serious problems. Patients who were younger, who lived in more deprived circumstances, who had advanced disease and had been treated with chemotherapy or radiotherapy reported greater levels of loneliness. Loneliness was associated with a worse overall quality of life, and worse physical and social-emotional function. Lonely patients need to be identified as early as possible so that support and interventions can be implemented and outcomes improved.PostprintPeer reviewe