Adversarially Tuned Scene Generation

Generalization performance of trained computer vision systems that use computer graphics (CG) generated data is not yet effective due to the concept of 'domain-shift' between virtual and real data. Although simulated data augmented with a few real world samples has been shown to mitigate domain shift and improve transferability of trained models, guiding or bootstrapping the virtual data generation with the distributions learnt from target real world domain is desired, especially in the fields where annotating even few real images is laborious (such as semantic labeling, and intrinsic images etc.). In order to address this problem in an unsupervised manner, our work combines recent advances in CG (which aims to generate stochastic scene layouts coupled with large collections of 3D object models) and generative adversarial training (which aims train generative models by measuring discrepancy between generated and real data in terms of their separability in the space of a deep discriminatively-trained classifier). Our method uses iterative estimation of the posterior density of prior distributions for a generative graphical model. This is done within a rejection sampling framework. Initially, we assume uniform distributions as priors on the parameters of a scene described by a generative graphical model. As iterations proceed the prior distributions get updated to distributions that are closer to the (unknown) distributions of target data. We demonstrate the utility of adversarially tuned scene generation on two real-world benchmark datasets (CityScapes and CamVid) for traffic scene semantic labeling with a deep convolutional net (DeepLab). We realized performance improvements by 2.28 and 3.14 points (using the IoU metric) between the DeepLab models trained on simulated sets prepared from the scene generation models before and after tuning to CityScapes and CamVid respectively.Comment: 9 pages, accepted at CVPR 201

Small medium micro enterprise business goals and government support: a South African case study

Small and medium-scale enterprises (SMMEs) form the majority of the enterprises in the South African economy. The South African government has identified the SMME sector as one of the potential enablers to achieve its objectives of improving job creation opportunities, reducing poverty and creating a more equitable distribution of wealth. The aim of this article was to provide a perspective on the success government support initiatives has had on the SMME sector. To achieve this, the study sought to analyse the perceived strengths and weaknesses of government's national strategy and its institutions tasked with creating an enabling environment for the sector. The study employed a survey research design methodology in which mixed methods were used. The national business strategy employed by government was critically analysed. Empirical data was collected from 282 respondents in order to answer the research question. The results show that the government's approach has favoured 'supply-side interventions' including, providing access to training, credit, mentoring and information to existing and new business. Furthermore, this study has identified the lack of awareness as the primary reason for the under-delivery of the government support initiatives in SMME development. Respondents indicated that they frequently made use of the services of business consultants and external specialists from which they perceived added more value to their respective businesses.Department of HE and Training approved lis

Malnutrition in older people - screening and management strategies

Copyright © 2004 Royal Australian College of General Practitioners Copyright to Australian Family Physician. Reproduced with permission. Permission to reproduce must be sought from the publisher, The Royal Australian College of General Practitioners.Background: Malnutrition in older people is not only common, but frequently overlooked. It can result in multiple medical complications, hospitalisation and even death. Objective: This article focusses on the consequences, pathophysiology, diagnosis and management of this clinical syndrome. Discussion: Nonphysiological causes of malnutrition include social, psychological, medical and medication related factors. With vigilance, early screening and the institution of simple therapeutic measures of correcting nonphysiological causes and following dietary guidelines for older people, the adverse effects of malnutrition may be minimised.Renuka Visvanathan; Jonathan W Newbury; Ian Chapma

HIV Infection and TLR Signalling in the Liver

Despite the availability of effective combination antiretroviral therapy (cART), liver disease is one of the leading causes of morbidity and mortality in Human Immunodeficiency Virus (HIV)-infected individuals, specifically, in the presence of viral hepatitis coinfection. HIV, a single stranded RNA virus, can bind to and activate both Toll-like receptor (TLR)7 and TLR8 in circulating blood mononuclear cells, but little is known about the effect of HIV on TLRs expressed in the liver. HIV can directly infect cells of the liver and HIV-mediated depletion of CD4+ T-cells in the gastrointestinal tract (GI tract) results in increased circulating lipopolysaccharide (LPS), both of which may impact on TLR signaling in the liver and subsequent liver disease progression. The potential direct and indirect effects of HIV on TLR signaling in the liver will be explored in this paper

Implementing geriatric programmes of excellence in Adelaide, Australia

The health system in Australia is grappling with how best to provide health care to older people in conditions of reduced inpatient beds and an ageing population. Health system managers favour programmes that result in reduced length of hospital stay. We report our hospital’s experience in developing geriatric programmes of excellence that are based on comprehensive geriatric assessment and across the continuum of care, coupled with built environment, teaching, and research. Between 2007 and 2012, the programmes contributed to a 2-day reduction in acute length of stay for patients aged 80 years and older at the hospital. This translated to 8070 bed days or 22 beds saved per year.Renuka Visvanatha

Optical Polarization of 52 Radio-Loud QSOs and BL Lac Objects

Polarization measurements are presented for 52 radio-loud QSOs and BL Lac objects. For 9 highly polarized (p >3%) AGN, these are the first published polarization measurements. Of these 9, 7 are highly-polarized QSOs (HPQs), one is a BL Lac object and another is a likely BL Lac object. Polarization variability is confirmed for some of these new and previously known highly-polarized AGN. While 6 of the HPQs have flat radio spectra are almost certainly blazars, PKS 1452-217 is probably a new member of the rare class of radio-loud QSOs that show high polarization by scattering, and is therefore important for testing orientation Unified Schemes. In competition for the highest redshift HPQ are the well-observed QSO PKS 0438-43 at z = 2.85, with maximum p = 4.7%, and PKS 0046-315 at z = 2.72, for which we find p = 13%.Comment: 6 pages. Astronomical Journal, in pres

The effects of drinks made from simple sugars on blood pressure in healthy older people

The objective of the research was to determine the blood pressure (BP) lowering effects in older people of 50 g carbohydrate drinks with varying carbohydrate content using a randomised, cross-over study with ten (six females) healthy older subjects (mean age 72·20 (SEM 1·50) years). BP, heart rate and glucometer-derived blood glucose levels were determined at baseline and following the ingestion of equal volumes (300 ml) of water and carbohydrate drinks with varying nutrient content (glucose, sucrose and fructose). A significant decline in BP over the first 60 min was seen following glucose (systolic BP (SBP) P,0·01, diastolic BP (DBP) P,0·01, mean arterial BP (MAP) P¼0·03) and sucrose (SBP P,0·01, DBP P,0·01, MAP P,0·01) ingestion, although the decrease occurred earlier after glucose than sucrose ingestion (SBP 7·33 (SEM 2·19) v. 21·00 (SEM 4·30) min (P¼0·03) and MAP 11·22 (SEM 3·10) v. 17·00 (SEM 3·78) min (P¼0·03)). BP increased after water ingestion (SBP P¼0·04, DBP P¼0·18, MAP P¼0·02) but did not change after fructose ingestion (SBP P¼0·36, DBP P¼0·81, MAP P¼0·34). Post hoc analyses revealed that the BP (SBP, DBP and MAP) decrease following glucose and sucrose ingestion were similar but significantly greater than following fructose or water ingestion. Sucrose, which is used widely (table sugar), reduces BP as much as glucose. In contrast to this, fructose ingestion causes no change in BP. Further studies are required to determine if the substitution of glucose or sucrose with fructose may be beneficial in the medical management of older people with severe symptomatic postprandial hypotension.R. Visvanathan, R. Chen, M. Garcia, M. Horowitz and I. Chapma