title: Combining strengths, emotions and polarities for boosting Twitter sentiment analysis

authors: Bravo-Marquez, Felipe

abstract: Twitter sentiment analysis or the task of automatically retrieving opinions from tweets has received an increasing interest from the web mining community. This is due to its importance in a wide range of fields such as business and politics. People express sentiments about specific topics or entities with different strengths and intensities, where these sentiments are strongly related to their personal feelings and emotions. A number of methods and lexical resources have been proposed to analyze sentiment from natural language texts, addressing different opinion dimensions. In this article, we propose an approach for boosting Twitter sentiment classification using different sentiment dimensions as meta-level features. We combine aspects such as opinion strength, emotion and polarity indicators, generated by existing sentiment analysis methods and resources. Our research shows that the combination of sentiment dimensions provides significant improvement in Twitter sentiment classification tasks such as polarity and subjectivity.

text: Combining strengths, emotions and polarities for boosting Twitter sentiment analysis Twitter sentiment analysis or the task of automatically retrieving opinions from tweets has received an increasing interest from the web mining community. This is due to its importance in a wide range of fields such as business and politics. People express sentiments about specific topics or entities with different strengths and intensities, where these sentiments are strongly related to their personal feelings and emotions. A number of methods and lexical resources have been proposed to analyze sentiment from natural language texts, addressing different opinion dimensions. In this article, we propose an approach for boosting Twitter sentiment classification using different sentiment dimensions as meta-level features. We combine aspects such as opinion strength, emotion and polarity indicators, generated by existing sentiment analysis methods and resources. Our research shows that the combination of sentiment dimensions provides significant improvement in Twitter sentiment classification tasks such as polarity and subjectivity.

year: 2013-01-01

title: Utility Exchanger Network Design for Non-Isothermal Utility Considering Process Control

authors: Tarighaleslami, Amir Hossein

abstract: This paper investigates a preliminary control strategy based on bypass control loop of Utility Exchangers Network (UEN) for non-isothermal utilities in a Total Site Heat Integration (TSHI) system. Few details on the design and control of non-isothermal utility systems, e.g. hot water loops, that includes Total Site heat recovery are presented in the literature. Heat Exchanger Networks (HEN) can be considered as a combined Heat Recovery Network (HRN) and UEN for each individual processes within the Total Site. Control strategy presented in the current paper are based on the control of utility side in a process – utility heat exchanger match to control process stream target temperature and analyse Total Site (TS) utility system in a Process Integration point of view. Bypass control has been used in the research. A Hot Water loop as representative of a large industrial plant utility system is studied as a case study. The process stream segment target temperature to be achieved and process stream segment supply temperature and flow rate may vary up to ±15 %. The HW utility temperature in the loop is controlled by using indirect heat transfer from higher and lower level utility and by using HW loop bypass. A 24 h period has been considered for the study. Results show that the HW utility loop has a 2.4 MW heat deficit in time-average condition. By controlling the HW utility loop using the proposed heuristics, utility heating requirement may vary between 0.7 to 3.5 MW, which is supplied by the Low Pressure steam main.

text: Utility Exchanger Network Design for Non-Isothermal Utility Considering Process Control This paper investigates a preliminary control strategy based on bypass control loop of Utility Exchangers Network (UEN) for non-isothermal utilities in a Total Site Heat Integration (TSHI) system. Few details on the design and control of non-isothermal utility systems, e.g. hot water loops, that includes Total Site heat recovery are presented in the literature. Heat Exchanger Networks (HEN) can be considered as a combined Heat Recovery Network (HRN) and UEN for each individual processes within the Total Site. Control strategy presented in the current paper are based on the control of utility side in a process – utility heat exchanger match to control process stream target temperature and analyse Total Site (TS) utility system in a Process Integration point of view. Bypass control has been used in the research. A Hot Water loop as representative of a large industrial plant utility system is studied as a case study. The process stream segment target temperature to be achieved and process stream segment supply temperature and flow rate may vary up to ±15 %. The HW utility temperature in the loop is controlled by using indirect heat transfer from higher and lower level utility and by using HW loop bypass. A 24 h period has been considered for the study. Results show that the HW utility loop has a 2.4 MW heat deficit in time-average condition. By controlling the HW utility loop using the proposed heuristics, utility heating requirement may vary between 0.7 to 3.5 MW, which is supplied by the Low Pressure steam main.

year: 2018

title: “This is not us”: But actually, it is. Talking about when to raise the issue of colonisation.

authors: Waitoki, Waikaremoana

abstract: This paper is a commentary on some of the responses to the public narrative of the events after the March 15th Christchurch attack. Several colleagues had publicly and privately, offered their views on the Government’s and media outlets use of terms such as ‘unprecedented’, ‘our loss of innocence’ and ‘our darkest day’. A fiery and empassioned exchange of words emerged on social media about the statement: ‘This is not us’. By exposing the counternarrative to these emotion laden terms, a shady past, and invisible present was revealed. However, the timing of the talk about colonisation also seemed out of step with the need for sensitivity. This paper also explores the role of White supremacy and causal racism in New Zealand. A personal I/we/us narrative style is used throughout the paper to describe how Muslim and Maori lives intersected prior to, and after the attack. The timeline of events is primarily 1 week, and up to 6 weeks post the attack.

text: “This is not us”: But actually, it is. Talking about when to raise the issue of colonisation. This paper is a commentary on some of the responses to the public narrative of the events after the March 15th Christchurch attack. Several colleagues had publicly and privately, offered their views on the Government’s and media outlets use of terms such as ‘unprecedented’, ‘our loss of innocence’ and ‘our darkest day’. A fiery and empassioned exchange of words emerged on social media about the statement: ‘This is not us’. By exposing the counternarrative to these emotion laden terms, a shady past, and invisible present was revealed. However, the timing of the talk about colonisation also seemed out of step with the need for sensitivity. This paper also explores the role of White supremacy and causal racism in New Zealand. A personal I/we/us narrative style is used throughout the paper to describe how Muslim and Maori lives intersected prior to, and after the attack. The timeline of events is primarily 1 week, and up to 6 weeks post the attack.

year: 2019