5975 research outputs found
Sort by
Revolutionizing eco-friendly concrete : unleashing pulverized oyster shell and corncob ash as cement alternatives for sustainable building
No full textThe utilization of Portland cement (PC) as a conventional binder in concrete production is not completely eco friendly, spurring research into finding a more ecologically friendly way to produce concrete. This study recycles
waste materials such as corncob ash (CCA) and pulverized oyster shell (POS) as alternative binders at 5–15 wt%
of PC for ternary blended concrete (TBC) production and tested for mechanical properties after 3–120 curing ages
and durability performance after 120 days of immersion in 5 % of acidic and sulfate solutions. The embodied
energy (EE) and global warming potential (GWP) of TBC compositions were analyzed within cradle-to-gate
constraints, and the sustainability and economic indexes were evaluated. Microstructural characterization was
performed on concrete samples after 28 curing ages. The results indicated that CCA and POS incorporation
reduced TBC’s slump and early age strengths. However, the later age strengths were superior at 10 wt% CCA and
POS replacement level with 1–8 %, 1–7 %, and 1–9 % increases in compressive, flexural, and split tensile
strengths after 28–120 curing ages compared to the control samples. Adding 10 wt% CCA and POS contents to
TBC enhances its resistance to chemical attacks, reduces its EE and GWP by 19–25 % and 19–20 %, and increases
its sustainability score and eco-strength efficiency by 25 and 17 % compared to the control concrete. Incorpo rating CCA and POS into the TBC mix contributes C-A-S-H for strength development. Ultimately, this study offers
ecofriendly and durable concrete at 10 wt% CCA and POS substitution for sustainable building
Stability and metastability of trapless Bose-Einstein condensates and quantum liquids
No full textBased on the talk given at the International Workshop "Symmetry and
Integrability of Equations of Mathematical Physics" (17-20 December 2016,
NASU Institute of Mathematics, Kyiv)Various kinds of Bose-Einstein condensates are considered, which evolve without any geometric constraints or external trap potentials including gravitational. For studies of their collective oscillations and stability, including the metastability and macroscopic tunneling phenomena, both the variational approach and the Vakhitov-Kolokolov (VK) criterion are employed; calculations are done for condensates of an arbitrary spatial dimension. It is determined that that the trapless condensate described by the logarithmic wave equation is essentially stable, regardless of its dimensionality, while the trapless condensates described by wave equations of a polynomial type with respect to the wavefunction, such as the Gross-Pitaevskii (cubic), cubic-quintic, and so on, are at best metastable. This means that trapless “polynomial” condensates are unstable against spontaneous delocalization caused by fluctuations of their width, density and energy, leading to a finite lifetime
Omnichannel shopper behaviour in the emerging South African Fourth Industrial Revolution environment
Get PDFSubmitted in fulfilment of the requirements of the degree of Doctor of Philosophy in Marketing, Durban University of Technology, Durban, South Africa, 2025.The Fourth Industrial Revolution (4IR) is transforming global retail through emerging
technologies such as artificial intelligence, mobile applications, and social media platforms. In
South Africa, where digital adoption is rising amid unique socio-economic challenges, the
omnichannel retail model has gained relevance. Yet, limited empirical research examines how
South African consumers navigate omnichannel environments, particularly across different
product types.
This study investigates omnichannel shopper behaviour in South Africa within the 4IR context,
comparing decision-making for high-involvement (smartphones) and low-involvement
(groceries) products. Using a quantitative, cross-sectional design, data were collected from
428 purposively sampled omni-shoppers within socio-economic measures (SEMs) 6–10. A
single questionnaire was administered to all respondents, with separate sections for each
product category, ensuring equal sample sizes (n = 428). Structural Equation Modelling (SEM)
tested a conceptual framework integrating behavioural theories and digital enablers.
Findings show that, for high-involvement purchases, extensive information search and
perceived risk significantly influenced purchase behaviour, with AI tools and social media
exerting strong effects during the pre-purchase stage. Low-involvement decisions were
shaped mainly by convenience and affordability, with AI and social media playing a supportive
role. Both models confirm and extend the Technology Acceptance Model (TAM), Theory of
Planned Behaviour (TPB), and Consumer Decision-Making Model (CDM) within an emerging
market. Recommendations include leveraging AI and social media for engagement,
integrating online–offline channels for convenience, reducing perceived risks, and adopting
mobile-first strategies to expand reach.
This research delivers a validated omnichannel shopper model tailored to South Africa’s 4IR
retail environment, advancing theoretical understanding and providing actionable insights for
retailers and policymakers seeking inclusive, technology-driven strategies.
Counseling the geriatric population living with hearing loss: approaches used by audiologists in South Africa
Get PDFHearing loss is common in the geriatric population and can be caused by comorbidities or aging related hearing decline. In addition to diagnosing and treating hearing loss for this population, audiologists
counsel and educate clients and family members on many aspects of hearing and balance care to improve
patient outcomes. Counseling may help geriatric clients better understand and accept their communication
disorder, limitations, and restrictions, as well as enhance their psychological functioning. This study aimed
to investigate the approaches employed by audiologists when providing information and adjustment
support counseling to the geriatric population experiencing hearing loss. Purposive and snowball sampling
techniques were used to recruit fourteen audiologists practicing in South Africa. Data was collected through
interviews, and inductive thematic analysis was used to identify themes. The findings highlight that
audiologists provide information counseling by explaining evaluation processes, hearing loss, and hearing
aids, using educational resources during counseling and involving families and caregivers. Adjustment
support counseling was provided during follow-up sessions and by addressing patients’ emotional aspects.
This study examines audiologists’ perspectives on counseling for geriatric patients, highlighting its
importance in improving understanding of audiological assessments, hearing loss diagnoses, assistive
device options, and quality of life. The study also highlights limitations and calls for more undergraduate
and continuous professional development training programs to enhance counseling competency
Are perceptions of organizational communication color-blind? : A race comparative through a Chaos Theory lens
Get PDFWith the global trend to prioritize tailoring communication strategies to meet the ever-changing diverse workforce, the study reveals a more nuanced reality. While much focus is placed on addressing communication differences, this papers position is that not enough focus is on our basic human need to communicate. This paper aims to evaluate whether certain aspects of the flow of information and communication are racially shared perceptions. Furthermore, through a Chaos Theory lens, evaluate the influence of managerial and organizational control mechanisms on various internal communication perceptions. A quantitative method was adopted, and data was collected from 63 non-management respondents in an automotive group in Kwa-Zulu Natal, by a closed-ended 5-point Likert scale. Data was analyzed using descriptive and inferential statistics to identify racially shared and divergent perceptions of organizational communication and the statistically significance. Key findings conclude that the free and accurate flow of information is a shared perception, regardless of race, and thus, a basic human need. Furthermore, the study demonstrates the significant influence managerial and organizational control mechanisms have on aspects of organizational communication, and challenges current academic positions that similar race dyads experience higher levels of trust. Finally, the paper concludes that the significant negative perception to control mechanisms, such as informal idea-sharing processes, flexible communication between levels, and active participation in SOPs and policy development, is a racially shared perception
The role of leadership development on employee job performance at Ugu District Municipality
Get PDFSubmitted in fulfilment of the requirements of the degree of Masters in Human Resources Management, Durban University of Technology, Durban, South Africa, 2025.The purpose of this study was to explore the role of leadership development on
employee job performance at Ugu District Municipality. The main objectives of this
study were to investigate the role of leadership development at Ugu District
Municipality, to assess the challenges related to leadership development at Ugu
District Municipality, to assess the perception of employees at Ugu DM relating to
the types of leadership development programmes offered at the district municipality;
and to investigate the effects of leadership development on employee job
performance at Ugu District Municipality. The research design embraces a
quantitative approach with a pre-coded structured close ended questionnaire
comprising the 5 Point Likert Scale that was used to administer the instrument to
the selected sample respondents. Using Sekaran and Bougie’s (2014:268)
computed statistical table the total population for this study was 797 employees and
the sample size of 260 employees will be selected for circulation of questionnaires.
The systematic random sample will be used to select the requisite sample. A total
of 260 questionnaires were distributed to sample respondents and 203
questionnaires were collected. However, 57 of the distributed questionnaires were
not returned, this equated to a high response rate of 78 %. The data will be captured
to form a data set and thereafter statistically tested using the aid of the Statistical
Package for Social Sciences (SPSS) version 29.0 for Windows. Upon completion,
the entire dissertation was checked for plagiarism through the TURNITIN
Programme. The researcher recommended that top management at Ugu District
Municipality should focus on leadership development. Leadership development
needs to be supported, organized, connected to succession planning, further
motivated by return on investment (ROI), and in line with Ugu District Municipality's
strategic goals. The research project concluded with directions for future research
on the role of leadership development on employee job performance
Employee turnover within higher education : a case study of Walter Sisulu University
Get PDFSubmitted in fulfilment of the requirements of the degree of Doctor of Philosophy in Public Management, Durban University of Technology, Durban, South Africa, 2025.Employee turnover poses a significant challenge for higher education institutions,
affecting operational efficiency and organisational performance. This study examined
factors influencing turnover intentions at Walter Sisulu University (WSU), South Africa,
focusing on job satisfaction, organisational commitment, career development, and pay
satisfaction. The research aimed to inform effective retention strategies by analysing
the relationship between these factors and turnover intentions. The study employed a
quantitative approach with a cross-sectional survey design. Data was collected
through structured questionnaires distributed to a stratified random sample of 320
academic and non-academic staff members at WSU. Participants were selected using
simple random sampling, and out of 320 questionnaires distributed, 123 were returned
fully completed, resulting in a 38.47% response rate. Data analysis was conducted
using SPSS version 28, which included descriptive statistics, correlation analysis, and
multiple regression analysis.
Key findings revealed that employee turnover significantly impacts WSU's operational
functions, aligning with existing literature on turnover's disruptive nature in academic
institutions. Contrary to some previous studies, job satisfaction and organisational
commitment showed minimal impact on turnover intentions at WSU. Career
development opportunities and pay satisfaction, while positively related to retention,
were not decisive factors in turnover intentions. These findings suggest a complex
interplay of factors that influence employee decisions to stay or leave the institution.
The study's implications highlight the need for a multifaceted approach to employee
retention at WSU. While competitive compensation and career development
opportunities are important, they should be part of a comprehensive strategy
addressing various aspects of the work environment. The research underscores the
importance of regular assessments of employee needs and perceptions to develop
targeted retention initiatives. Future research could explore additional factors such as
leadership styles, work-life balance, and organisational culture to provide a more
comprehensive understanding of turnover dynamics in higher education settings.
Based on these findings, the study recommends that WSU strengthen leadership
development and recognition systems, expand career development opportunities, and adopt flexible work arrangements to improve employee retention. These strategies can
help stakeholders create a supportive work environment that fosters loyalty and
enhances institutional performance.
An empirical investigation into the effect of lodging establishment attributes on water conservation efforts in Zimbabwe
No full textWater conservation is a global concern, particularly in regions like Zimbabwe grappling with water scarcity. The hospitality industry is pivotal in sustainable water management with its diverse lodging establishments. This research examines the effect of lodging establishment features on water conservation efforts in Zimbabwe. Based on survey responses from 203 lodging facilities, the empirical investigation reveals significant associations between various lodging facility attributes and water conservation practices. Established lodging businesses demonstrate a propensity for standardised water sustainability initiatives, while higher-graded establishments focus on more advanced practices. The study also reveals that newer lodging facilities are more likely to embrace advanced water conservation methods due to accessibility to technological advancements. The findings contribute valuable insights into the dynamics influencing water conservation practices within the lodging sector seeking to address sustainability challenges
Perceptions of isiZulu speaking homoeopathic students and practitioners on the need to translate the homoeopathic Materia medica into isiZulu in KwaZulu-Natal
Get PDFDissertation submitted in partial fulfilment of the requirements for the Master of Technology in Homoeopathy at the Durban University of Technology, Durban, South Africa, 2025.Background
Homoeopathy has been widely practiced in South Africa for a long time and is
recognized as a legitimate type of Complementary and Alternative Medicine
(CAM), but it remains unfamiliar to the general public. The current materia medica
used in South Africa is in English. The aim of the study was to explore the
perceptions of isiZulu speaking homoeopathic students and practitioners on the
need to translate homoeopathic materia medica into isiZulu in KwaZulu-Natal. The
majority of the population in KwaZulu-Natal communicates in isiZulu as their
primary language, highlighting the crucial need to translate homoeopathic materia
medica into isiZulu to enhance accessibility and comprehension.
Methodology
The study design employed in this study was qualitative, exploratory, and
descriptive, with open-ended questions to elicit into participants' perceptions. The
study population consisted of registered homoeopathic practitioners and students
meeting specific criteria for inclusion. Sampling methods involved purposive and
snowball sampling to recruit participants. The study conducted twelve
semistructured interviews using Microsoft Teams with homoeopathic students and
practitioners. Data saturation was reached after eight interviews, leading to four
additional interviews for validation. Data collection included semi-structured
interviews with consent obtained and confidentiality maintained. Data analysis
followed Tesch's eight-step procedure for qualitative studies.
Findings
Four themes emerged from the thematic analysis, focusing on translation,
language barriers, language-based programs and difficulties in translating medical
textbooks. Participants expressed a strong desire for homoeopathy materia
medica to be translated into IsiZulu to aid in patient consultations and remedy
understanding. However, some participants raised concerns about potential
misuse and the complexity of translating certain medical terms. Language barriers
were highlighted as a significant challenge in prescribing remedies, with
participants emphasizing the importance of accurate translations for effective case
taking and repertorisation. The need for translated materials was underscored by
the difficulties in understanding and translating the original materia medica.
Overall, the study shed light on the importance of language accessibility in
homoeopathic practice and the potential benefits of translation for both
practitioners and patients.
Shaping the future of organisational change through effective leadership : a case study of the KwaZulu-Natal Road Traffic Inspectorate
Get PDFSubmitted in fulfilment of the requirements of the degree of Doctor of Philosophy in Management Sciences specialising in Business Administration at the Durban University of Technology, Durban, South Africa, 2025.In recent times, organisations have always been controlled by changes; hence, their
ability to respond positively to changing expectations and increased pressure is vital.
Changes in the environment compel organisations to change. Effective leadership is
critical during organisational change as leaders are central in the change management
process. Therefore, this study examined the role of leadership in change management in
the KwaZulu-Natal Road Traffic Inspectorate. An exploratory and qualitative research
design was adopted for this study. An exploratory research design is used when the
researcher intends to investigate a problem that is not clearly defined. A purposive
sampling research approach was used to select a sample of 28 participants: 3 senior
managers, 3 middle managers, 4 junior managers, 4 supervisors, 4 field supervisors, and
10 traffic officers of the KwaZulu-Natal Road Traffic Inspectorate in Empangeni (Region
1) and Ladysmith (Region 2) regions. Interviews were conducted face-to-face, generating
electronic voice recordings for transcription and analysis, ensuring data integrity. The
interviews' data were transcribed word-for-word and subjected to thematic analysis. The
transcriptions were imported into NVivo 12 for analysis, organising the coded data into
subthemes aligned with the research questions from the interview guide.
Twelve themes and various subthemes were uncovered as part of the findings of the
study. The examination of various themes related to organisational change within the
KwaZulu-Natal Road Traffic Inspectorate (KZN RTI) has provided valuable insights into
the complex dynamics surrounding change initiatives. Throughout the analysis, several
key findings have emerged, shedding light on the challenges, opportunities, and
recommendations for enhancing organisational effectiveness through successful change
management. First and foremost, the dynamic nature of organisational culture within the
KZN RTI underscores the importance of effective leadership, positive management
practices, and strategic human resource management in navigating cultural shifts. The
multifaceted rationales for change, including managerial appointments, technological
advancements, and negative management attitudes, highlight the need for balanced
approaches to ensure organisational resilience and competitiveness. Therefore, the
management of the KwaZulu-Natal Transport Inspectorate needs to institute operational
change management to control the application of governance strategies and processes
for the successful delivery of an excellent and effective infrastructure