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(i) The Position of the Vertical Asymptotes Vertical asymptotes of the (X, y) curve are given by those values of X which make y infinite. Taking the curve in the form given by Eq. (10), viz.:

I invited service user representatives and mental health association leaders to comment on the benefit system in just 50 words. A torrent of criticism poured out of my fax machine. In this we are united. They are demanding a system free from fear which enables and rewards working as and when health allows.The Green Paper March 1998 failed to remove ‘serious barriers to work’. The modest improvements are described on p34.The Snakes & Ladders of the system remain as real life: shake the dice, move four steps forward and find you've landed on the wrong square. The DSS regulations snatch your security and toss you down. You are worse off than before you started.The Government invites our response to the Green Paper; we must ensure that they get it.

In less than a decade to sustainable development goals (SDGs) there is a threat of household waste emanating from sub-urban sprawl especially in developing countries. Private approaches with government-enabling environments have been proved a successful platform for urban services such as housing provision and telecommunication in developing cities. Still private solid waste management (PSWM) seems different in Nigeria. Therefore, this paper aims to investigate the possible perceived hindrances facing PSWM organisations and proffer feasible policies to enhance sustainable clean and healthy cities.

Seven communities within Benin City sub-urban environs were adopted as the study area to accomplish the research’s objectives via a phenomenology type of qualitative research design. The study analysed the collated data from the knowledgeable participants via a thematic approach.

Lax legislative, absence of institutional framework, inadequate economic motivation, inadequate technical operations, among others, emerged as the encumbrances faced by PSWM firms. Wastes dumped along unethical locations such as streets, roads, uncompleted buildings, culverts and drainage channels, and undeveloped plots emerged as the encumbrance outcomes. Findings show that proffering feasible policy solutions to tackle identified hindrances can promote the achievement of SDGs across semi-urban locations in Nigeria.

This research is restricted to urban household waste management by PSWM within Nigeria. Also, the study identified the challenges and proffer policy solutions to enhance improved clean environment within the sub-urban and urban cities.

As part of this study’s implications, results from this research intend to guide government policymakers and PSWM firms to encourage collaboration in designing appropriate strategic and educational programmes for the householders (customers) in sub-cities. It will be achieved via feasible policies that are tailored towards achieving sustainable health and environment-friendly sub-urban locations.

This paper intends to enhance proper PSWM and create sustainable cities via collaboration. Also, the paper engaged key stakeholders via a qualitative research design to proffer possible solutions to the menace of sub-urban and urban household waste management.

Most studies on Sentiment Analysis are performed in English. However, as the third most spoken language on the Internet, Sentiment Analysis for Spanish presents its challenges from a semantic and syntactic point of view. This review presents a scope of the recent advances in this area.

A systematic literature review on Sentiment Analysis for the Spanish language was conducted on recognized databases by the research community.

Results show classification systems through three different approaches: Lexicon based, Machine Learning based and hybrid approaches. Additionally, different linguistic resources as Lexicon or corpus explicitly developed for the Spanish language were found.

This study provides academics and professionals, a review of advances in Sentiment Analysis for the Spanish language. Most reviews on Sentiment Analysis are for English, and other languages such as Chinese or Arabic, but no updated reviews were found for Spanish.

Studies show that building information modelling (BIM) technology can improve construction productivity regarding the design, construction and maintenance of a project life cycle in the 21st century. Revit has been identified as a frequently used tool for delivering BIM in the built environment. Studies about BIM technology via Revit are scarce in training middle-level workforce higher education institutions. Thus, this study aims to investigate the relevance of BIM technology and offer measures to promote digitalisation in Nigeria’s built environment polytechnic undergraduates via Revit.

Given the unexplored nature of training the middle-level workforce in Nigeria, 37 semi-structured virtual interviews were conducted across Nigeria, and saturation was achieved. The participants were knowledgeable about construction-related BIM. The researchers used a thematic analysis for the collected data and honed them with secondary sources.

Improved visualisation of design, effective and efficient work productivity, automatic design and quantification, improved database management and collaboration and data storage in the centrally coordinated model, among others, emerged as BIM’s benefits. BIM technology via Revit is challenging, especially in Nigeria’s polytechnic education curriculum. The 24 perceived issues were grouped into government/regulatory agencies-related, polytechnic management-related and polytechnic undergraduate students-related hindrances in Nigeria’s built environment.

This study is limited to BIM implications for Nigeria’s built environment polytechnic undergraduates.

This study contributes to the literature paucity in attempting to uncover perceived issues hindering the implementation of BIM technology via Revit in training Nigeria’s built environment polytechnic undergraduates via a qualitative approach.

The increasing growth of urbanisation, especially in developing countries, coupled with affordable housing leakages, may thwart achieving Sustainable Development Goal (SDG) 11 (sustainable cities and communities). Studies regarding affordable housing leakages and their aftermath to Goal 11 in one study are scarce in Malaysia. The study investigated Malaysia's low-cost housing (LCH) leakages and their aftermath to Goal 11 and proffered measures to achieving Goal 11 and its targets. The purpose of this paper is to address these issues.

The researchers covered four of Malaysia's major cities via a qualitative approach. The study used 40 participants via semi-structured virtual interviews, and saturation was achieved. The study adopted a thematic approach for the collected data and honed them with secondary sources.

Findings group Malaysia's LCH leakages into government/agencies/departments in housing, housing developers/building contractors and client/building owners' root causes in Malaysia's context. It shows a threat from Malaysia's LCH leakages to achieving Goal 11 and proffered measures to enhance achieving Goal 11. Achieving Goal 11 will strengthen and improve Malaysia's many SDGs accomplishments because of their link.

Apart from proffering measures to mitigate long-standing issues (leakages) in Malaysia's LCH delivery from achieving Goal 11, findings will stipulate the accomplishment of other SDGs related to housing delivery.

Aerospace is a demanding technological and industrial sector. Several regulations and policies via innovative digital transformation have been integrated to impact production systems and supply chains, including safety measures. Studies demonstrated that the Fourth Industrial Revolution (4IR) technologies could enhance productivity growth and safety measures. The 4IR role in influencing airlines’ growth is yet to receive in-depth studies in South Africa. Thus, this study aims to investigate the role of 4IR technologies in influencing airlines’ growth in South Africa.

This research used a qualitative research method. Primary data were compiled via 56 face-to-face semi-structured interviews with major stakeholders. The study achieved saturation. A thematic method was used to analyse the collected data.

Findings reveal the nine major factors influencing South African airlines’ growth in the 4IR era. This includes investment in ergonomics applications and research, governance is driven by 4IR, collaboration and incorporation of 4IR concepts, partnership with drone technology and high precision and efficiency with 4IR. Others are reskilling and upskilling, investment in 4IR software, policies to promote 4IR usage in the industry and policies to reduce human interface.

Understanding the relative significance of 4IR technologies’ role in airlines’ growth can assist critical stakeholders in promoting innovative policies and regulations tailored towards digitalised aerospace. Thus, the study contributes to strategies to improve digital innovation, airline growth and safety as components of the air travel demands in South Africa.

This study aims to explore the role General Managers (GMs) play in mitigating the effects of the unprecedented COVID-19 pandemic.

Qualitative structured interviews conducted online with 50 hospitality GMs from 45 countries are used to explore the impact of the pandemic on the industry’s operational norms and the role of managers in both managing the crisis and planning contingencies for recovery.

The findings enhance the conceptual capital in this emerging field and provide insights on how GMs behave during crises. Four related sub-themes emerged from the data analysis, namely, contingency planning and crisis management, resilience and impact on GM roles, the impact on hotels’ key functional areas and some GMs’ suggestions for the future of luxury hospitality.

This study generates empirical data that inform contemporary debates about crisis management and resilience in hospitality organizations at a micro-level operational perspective.

Findings suggest that, in times of uncertainty and crisis, luxury hotel GMs are vital in coping with changes and leading their organizations to recovery. GMs’ resilience and renewed role and abilities enable them to adapt rapidly to external changes on their business environment.

This study is unique in terms of scale and depth, as it provides useful insights regarding the GM’s role during an unprecedented crisis such as COVID-19.

The purpose of this paper is to understand (i) how crime linkage is currently performed with residential burglaries in New Zealand, (ii) the factors that promote/hinder accurate crime linkage and (iii)whether computerised decision-support tools might assist crime linkage practice.

A total of 39 New Zealand Police staff completed a questionnaire/interview/focus group relating to the process, challenges, products and uses of crime linkage with residential burglary in New Zealand. These data (alongside four redacted crime linkage reports) were subjected to thematic analysis.

The data clearly indicated wide variation in crime linkage process, methods and products (Theme 1). Furthermore, a number of factors were identified that impacted on crime linkage practice (Theme 2).

Future research should develop computerised crime linkage decision-support tools and evaluate their ability to enhance crime linkage practice. Also, researchers should explore the use of crime linkage in court proceedings.

To overcome the barriers identified in the current study, greater training in and understanding of crime linkage is needed. Moreover, efforts to enhance the quality of crime data recorded by the police will only serve to enhance crime linkage practice.

By enhancing crime linkage practice, opportunities to reduce crime, protect the public and deliver justice for victims will be maximised.

The practice of crime linkage is under-researched, which makes it difficult to determine if/how existing empirical research can be used to support ongoing police investigations. The current project fills that gap by providing a national overview of crime linkage practice in New Zealand, a country where crime linkage is regularly conducted by the police, but no published linkage research exists.

Dynamic governance practices are key in the administration of 21st-century airlines. Knowledge transfer via the fourth industrial revolution (4IR) is germane in governance practices. Studies have proven that the 4IR technologies could enhance airline governance and improve safety measures and productivity. The 4IR role in improving airline governance is yet to receive in-depth studies in South Africa. Thus, this study aims to investigate the governance challenges facing South African airlines in the era of 4IR.

This research used a qualitative research method. The main data were collected via 56 face-to-face semi-structured interviews with key stakeholders. The research achieved saturation. A thematic technique was used to analyse the collected data.

Findings reveal 12 challenges and are grouped into six governance barriers facing South African airlines in the era of 4IR. Also, findings suggest measures to mitigate governance barriers and promote 4IR technologies usage in the airline sector.

The study assesses critical governance challenges facing South African airlines in the era of 4IR. Understanding the importance of vital governance challenges can assist critical stakeholders in promoting innovative policies and regulations tailored towards digitalised aerospace. Thus, the study contributes strategies to improve digital innovation and reduce airline risks in South Africa. Also, it contributes to the paucity of academic literature on developing countries’ airline governance in the 4IR era and the South African aviation sector.