A Complete Text-Processing Pipeline for Business Performance Tracking

Natural text processing is amongst the most researched domains because of its varied applications. However, most existing works focus on improving the performance of machine learning models instead of applying those models in practical business cases. We present a text processing pipeline that enables business users to identify business performance factors through sentiment analysis and opinion summarization of customer feedback. The pipeline performs fine-grained sentiment classification of customer comments, and the results are used for the sentiment trend tracking process. The pipeline also performs topic modelling in which key aspects of customer comments are clustered using their co-relation scores. The results are used to produce abstractive opinion summarization. The proposed text processing pipeline is evaluated using two business cases in the food and retail domains. The performance of the sentiment analysis component is measured using mean absolute error (MAE) rate, root mean squared error (RMSE) rate, and coefficient of determination

The linear span of projections in AH algebras and for inclusions of C*-algebras

A $C^*$-algebra is said to have the LP property if the linear span of projections is dense in a given algebra. In the first part of this paper, we show that an AH algebra $A = \underrightarrow{\lim}(A_i,\phi_i)$ has the LP property if and only if every real-valued continuous function on the spectrum of $A_i$ (as an element of $A_i$ via the non-unital embedding) belongs to the closure of the linear span of projections in $A$. As a consequence, a diagonal AH-algebra has the LP property if it has small eigenvalue variation. The second contribution of this paper is that for an inclusion of unital $C^*$-algebras $P \subset A$ with a finite Watatani Index, if a faithful conditional expectation $E\colon A \rightarrow P$ has the Rokhlin property in the sense of Osaka and Teruya, then $P$ has the LP property under the condition $A$ has the LP property. As an application, let $A$ be a simple unital $C^*$-algebra with the LP property, $G$ a finite group and $\alpha$ an action of $G$ onto $\mathrm{Aut}(A)$. If $\alpha$ has the Rokhlin property in the sense of Izumi, then the fixed point algebra $A^G$ and the crossed product algebra $A \rtimes_\alpha G$ have the LP property. We also point out that there is a symmetry on CAR algebra, which is constructed by Elliott, such that its fixed point algebra does not have the LP property.Comment: 24 page

Improving performance of far users in cognitive radio: Exploiting NOMA and wireless power transfer

In this paper, we examine non-orthogonal multiple access (NOMA) and relay selection strategy to benefit extra advantage from traditional cognitive radio (CR) relaying systems. The most important requirement to prolong lifetime of such network is employing energy harvesting in the relay to address network with limited power constraint. In particular, we study such energy harvesting CR-NOMA using amplify-and-forward (AF) scheme to improve performance far NOMA users. To further address such problem, two schemes are investigated in term of number of selected relays. To further examine system performance, the outage performance needs to be studied for such wireless powered CR-NOMA network over Rayleigh channels. The accurate expressions for the outage probability are derived to perform outage comparison of primary network and secondary network. The analytical results show clearly that position of these nodes, transmit signal to noise ratio (SNR) and power allocation coefficients result in varying outage performance. As main observation, performance gap between primary and secondary destination is decided by both power allocation factors and selection mode of single relay or multiple relays. Numerical studies were conducted to verify our derivations.Web of Science1211art. no. 220

Scope And Outcomes Of A Trauma Quality Improvement Program At Royal Prince Alfred Hospital, Australia 2006-2016

Background Injury and trauma remain important causes of morbidity and mortality globally. Trauma systems have been established to facilitate optimal management of injured patients, including timely access to specialist trauma centres in those who are severely injured. Trauma quality improvement programs have emerged over the past decade to evaluate and improve quality of care delivered by trauma systems and trauma centres. Despite this, there remains little evidence to demonstrate that these quality improvement programs actually improve patient outcomes or whether they are cost-effective. In 2006, a trauma quality improvement program was initiated at Royal Prince Alfred Hospital, Australia. This consisted primarily of the implementation of trauma team activation and resuscitation protocols, and the evaluation of care through the use of clinical indicators (key performance indicators) and measurement of post discharge health status. Objectives This thesis describes a quality improvement program at Royal Prince Alfred Hospital that involved monitoring of all major clinical services involved in the acute care of trauma at this hospital, and evaluates this program with respect to in-patient mortality for severe injury, cost effectiveness and long term outcomes. Methods The studies were conducted at Royal Prince Alfred Hospital (RPA) in New South Wales Australia. The thesis is presented in four main sections. The first section (chapters 1 to 4) provides an outline of the thesis and summarises the current literature on trauma quality improvement programs. Preliminary papers describe the historical context of the trauma service at this institution and discuss the conceptual framework for trauma patient data collection. The second section (chapters 5 to 9) provides background information regarding contemporaneous trends in injury presentations to Emergency Departments and major trauma activity and mortality across NSW. The third section (chapters 10 to 13) details and evaluates the impact of the trauma quality improvement program on long-term major trauma mortality trends at this hospital using time series analysis and its cost effectiveness in a subset of road trauma patients. It also investigates health status outcomes in trauma patients at three and six months after hospital discharge - a project initiated as part of the quality improvement program. Results Injury is one of the leading causes of presentations to Emergency Departments across NSW and the critically injured make up around 1% of total injury presentations. Major trauma in-hospital mortality across NSW has remained stable at around 16% between 2003 and 2014. The trauma quality improvement program at RPA was associated with a significant reduction in major trauma mortality from 16% to 10% after 2007. The incremental cost effectiveness was estimated to be $7600 per year of life saved in the subset of road trauma patients. Analyses of health outcomes after discharge revealed increasing injury severity and upper limb injuries were the only predictors of reduced employment status after injury, and lower limb injuries were associated with reduced physical health status compared to those without lower limb injuries at both 3 and 6 months post discharge. Around 37% of patients reported signs of psychological distress and this did not change significantly during the study interval. Conclusions This thesis has published important new information regarding the clinical and cost-effectiveness of trauma quality improvement programs. It contains the first published studies evaluating these interventions using formal time series and health economics analysis and one of few reporting the intervention in the context of existing injury and trauma management systems in New South Wales Australia

Effects of Cardiolipin on Membrane Morphology: A Langmuir Monolayer Study

AbstractCardiolipin (CL) is a complex phospholipid that is specifically found in mitochondria. Owing to the association of the CL levels with mitochondrial physiopathology such as in Parkinson’s disease, we study the molecular effect of CL on membrane organization using model Langmuir monolayer, fluorescence microscopy, and x-ray reflectivity. We find that the liquid-expanded phase in membranes increases with increasing CL concentration, indicating an increase in the elasticity of the mixed membrane. The Gibbs excess free energy of mixing indicates that the binary monolayer composed of CL and DPPC is most thermodynamically stable at ΦCL = 10 mol %, and the stability is enhanced when the surface pressure is increased. Additionally, when ΦCL is small, the expansion of the membrane with increasing CL content was slower at higher surface pressure. These abnormal results are indicative of a folding structure being present before a collapsing structure, which was confirmed by using fluorescence microscopy and was characterized by using x-ray reflectivity with the electron density profile along the membrane’s surface normal