Boosted Multiple Kernel Learning for First-Person Activity Recognition

Activity recognition from first-person (ego-centric) videos has recently gained attention due to the increasing ubiquity of the wearable cameras. There has been a surge of efforts adapting existing feature descriptors and designing new descriptors for the first-person videos. An effective activity recognition system requires selection and use of complementary features and appropriate kernels for each feature. In this study, we propose a data-driven framework for first-person activity recognition which effectively selects and combines features and their respective kernels during the training. Our experimental results show that use of Multiple Kernel Learning (MKL) and Boosted MKL in first-person activity recognition problem exhibits improved results in comparison to the state-of-the-art. In addition, these techniques enable the expansion of the framework with new features in an efficient and convenient way.Comment: First published in the Proceedings of the 25th European Signal Processing Conference (EUSIPCO-2017) in 2017, published by EURASI

Akromegalia może wiązać się z zaburzeniami rozkurczu dolnego zwieracza przełyku (LES)

  Introduction: Although prolonged small intestine and colonic transit time has been demonstrated in acromegaly patients, the influence of acromegaly on oesophagus motility and the pathological mechanisms involved are still not clarified. We aimed to investigate manometric measurements to ascertain whether oesophagus motility is affected in active acromegaly patients. Material and methods: The study was performed in an institutional referral centre at a tertiary care hospital. Twenty-three acromegaly patients (mean age 43.2 ± 13.2 years) and 25 sex- and age-matched healthy control subjects (mean age 48.6 ± 7.9 years) were recruited to a case-control study. Oesophageal manometry was performed using MMS (Medical Measurement Systems, Netherlands) Solar GI — Air Charged Intelligent Gastrointestinal Conventional Manometry. Results: In manometric measurements the lower oesophageal sphincter pressure was 18 ± 7 mmHg in acromegaly patients and 15.6 ± 4.4 mm Hg in controls, and there was no significant difference (p = 0.17). The percentage of relaxation was 64.8% and 81.8%, respectively, and it was significantly lower in acromegaly patients than in controls (p < 0.001). Additionally, the duration of relaxation was found to be 4 ± 1.9 seconds and 5 ± 1.7 seconds in patients and controls, respectively (p = 0.049). Conclusions: Our study has demonstrated a significant reduction in the percentage and duration of lower oesophageal sphincter relaxation in oesophagus motility even in acromegaly patients without any gastrointestinal symptoms. Further clinical and pathophysiological studies are required to clarify the underlying mechanisms of gastrointestinal motility disorders in acromegaly. (Endokrynol Pol 2015; 66 (4): 308–312)    Wstęp: Chociaż u pacjentów chorujących na akromegalię wykazano wydłużony czas pasażu żołądkowo-jelitowego, wpływ akromegalii na motorykę przełyku oraz powiązane z tym mechanizmy patologiczne nadal nie są wyjaśnione. Celem pracy było zbadanie za pomocą pomiarów manometrycznych czy motoryka przełyku ulega zmianie u pacjentów z aktywną akromegalią. Materiał i metody: Badanie przeprowadzono w ośrodku referencyjnym w szpitalu specjalistycznym. Dwudziestu trzech pacjentów chorujących na akromegalię (śr. wiek 43,2 ± 13,2 lat) oraz w grupie kontrolnej 25 osób dopasowanych pod względem płci i wieku (śr. wiek 48,6 ± 7,9 lat) zostało zakwalifikowanych do badania kliniczno-kontrolnego. Manometrię przełyku wykonano za pomocą MMS (Medical Measurement Systems, Holandia) Solar GI. Wyniki: W pomiarach manometrycznych u pacjentów ciepiących na akromegalię, ciśnienie dolnego zwieracza przełyku wynosiło 18 ± 7 mm Hg, a u osób kontrolnych wynosiło ono 15,6 ± 4,4 mm Hg, nie było więc znaczącej różnicy między grupami (p = 0,17). odsetek rozkurczu wynosił odpowiednio 64,8% i 81,8% i był on znacznie niższy u pacjentów z akromegalią (p < 0,001). Ponadto, długość trwania rozkurczu wynosiła odpowiednio 4 ± 1,9 sek. i 5 ± 1,7 sek. (p = 0,049). Wnioski: Niniejsze badanie wykazało znaczną redukcję odsetka i czasu trwania rozkurczu dolnego zwieracza przełyku w motoryce przełyku, nawet u pacjentów z akromegalią bez objawów żołądkowo-jelitowych. Należy przeprowadzić dalsze badania kliniczne i patofizjologiczne, aby wyjaśnić mechanizmy leżące u podłoża zaburzeń motoryki żołądkowo-jelitowej u pacjentów chorujących na akromegalię. (Endokrynol Pol 2015; 66 (4): 308–312)

Gastroenterology Cases of Cutaneous Leukocytoclastic Vasculitis

Rarely, leukocytoclastic vasculitis can result from ischemic colitis, inflammatory bowel disease, and cryoglobulinemia. There is no established standard for the treatment of leukocytoclastic vasculitis associated with gastroenterologic diseases. This paper presents three cases of leukoytoclastic vasculitis, each of which is associated with a different gastroenterologic condition: ischemic colitis, Crohn’s disease, and chronic hepatitis C. Each condition went into remission by treatment of leukocytoclastic vasculitis, regardless of the underlying disease

CARDIOVASCULAR RISK FACTORS CAN AFFECT ENDOTHELIAL DYSFUNCTION IN ESSENTIAL HYPERTENSIVES: ACROSS SECTIONAL CASE-CONTROL STUDY

Objective: Endothelial dysfunction is now recognized as an early, perhaps initiating event in the pathogenesis of cardiovascular diseases. The purpose of the present study was to examine the influence of cardiac risk factors on endothelial function in essential hypertension (EH)

Characteristics and outcomes of carbapenemase harbouring carbapenem-resistant Klebsiella spp. bloodstream infections: a multicentre prospective cohort study in an OXA-48 endemic setting

A prospective, multicentre observational cohort study of carbapenem-resistant Klebsiella spp. (CRK) bloodstream infections was conducted in Turkey from June 2018 to June 2019. One hundred eighty-seven patients were recruited. Single OXA-48-like carbapenemases predominated (75%), followed by OXA-48-like/NDM coproducers (16%). OXA-232 constituted 31% of all OXA-48-like carbapenemases and was mainly carried on ST2096. Thirty-day mortality was 44% overall and 51% for ST2096. In the multivariate cox regression analysis, SOFA score and immunosuppression were significant predictors of 30-day mortality and ST2096 had a non-significant effect. All OXA-48-like producers remained susceptible to ceftazidime-avibactam