Search results

The purpose of this paper is to present a numerical analysis of the laser surgery of port wine stain (PWS) with cryogen spray cooling to compare the treatment effect between pulse dye laser and Nd:YAG laser, explain the incomplete clear of the lesion and optimize the laser parameter.

The complex structure of skin and PWS is simplified to a multi-layer skin model that consists of top epidermal layer and underneath dermis layer embedded with discrete blood vessels. The cooling effect of cryogen spray before laser firing is quantified by a general correlation obtained recently from the experimental data. The light distribution is modeled by the Monte Carlo method. The heat transfer in skin tissue is calculated by Pennes bioheat transfer model. The thermal damage of blood vessel is quantified by the Arrhenius damage integral.

For the vessel size studied (10-120 µm), pulse duration is recommended shorter than 6 ms. Large and deeply buried vessels, which may survive from 595 nm laser irradiation, can be coagulated by 1,064 nm laser due to its deep light penetration depth in skin. Furthermore, a desired uniform heating within the large vessel lumen can be achieved by 1,064 nm laser whereas 595 nm laser produce non-uniform heating.

The possible reason for the poor responding and incomplete clearance lesions is clarified. Laser wavelength and pulse duration are suggested to improve the clinical results.

The Development and Evaluation Committee (DEC) provides local guidance on the value of new and existing health care technologies, including drugs, devices, procedures and health care settings. The system is made up of two components: i) literature review and cost‐effectiveness estimation of the proposed and current technologies, and ii) consideration by the Development and Evaluation Committee which arbitrates, makes recommendations and disseminates results across the South and West region. Sixty‐three reviews have been undertaken to date, including, for example, beta interferon for multiple sclerosis, pulsed dye laser in the treatment of port‐wine stains, and paclitaxel in ovarian cancer. The outcomes of this service are guides to purchasing which are both carefully researched and scrutinized.

The physical filmmaking landscape has been transformed by the emergence of digital platforms that foster interaction and dialogue. The accessibility and affordability of mobile production tools have empowered anyone with a mobile phone to become a media content creator. Accordingly, this paper aims to present a multi-method approach for creating phygital projects that involve people as active participants rather than mere subjects who collaborate with the researchers to tell their stories.

Research participants can embrace diverse roles, serving as co-researchers, content creators, curators and collaborators. The authors use various engagement strategies with the research participants, who are often marginalized or underrepresented, to encourage their participation and give them agency and creative control. Thus, we also use a participatory action research approach to help advocate for the participants’ facial equality concerns.

Collaborative videography embraces the mosaic of voices expressing intricate social issues. In this project, research participants with “facial differences” explain their experiences in facing society.

By experimenting with participatory frameworks and combining physical interactions (such as in-person meetings) with digital platforms like Zoom and social media, the authors suggest a multi-method approach that honors the authentic stories of the research participants, effectively engages the audience and explains how phygital research methodologies can be used in interpretive consumer research, particularly in co-creating films that capture strong visuals.

This paper aims to understand the laser–tissue interaction mechanism during ophthalmic laser surgeries through numerical analysis. The influence of laser parameters and the multipulse technique were investigated.

The ocular fundus was simplified as a multilayered homogenous medium model. Afterward, the multilayer Monte Carlo method was used to simulate the propagation and energy deposition of laser light, and a local thermal non-equilibrium two-temperature model was established to simulate the temperature variation of chromophores and surrounding tissue with different laser wavelength.

Through the model, the selective heating of chromophore (melanin and blood vessels) was clearly illustrated: 1) neglecting the laser energy absorbance by blood in the traditional model will cause significant errors in temperature calculation; 2) the non-thermal equilibrium heat transfer model was needed to obtain an accurate description of the thermal process when the dimensionless pulse width (tp*) is <10⁵. For 532 nm Argon laser, the optimize tp* is around 10⁵ and the appropriate energy density is 5 J/cm²; 3) multipulse technique makes the energy more concentrated within the melanin, thereby reducing the thermal damage in surrounding tissue, with most appropriate pulse number and duty cycle is 10 and 1/10.

Taking the blood absorption into account, the different temperature variations of melanin/vessels and surrounding tissue caused by the selective photo-thermolysis were simulated successfully. By understanding the mechanism of laser therapy, laser parameters and multipulse technique are suggested to improve the clinical results.

Sports fashion is marketed showing happiness, physical performance and self-care. Thus, sports fashion brands should see a good fit with sustainability: future orientation, self-care, care for others and going out for a physical experience, oftentimes in nature. On the other hand, sports fashion is regularly made of non-sustainable materials and produced under difficult work conditions. This paper aims to discuss the aforementioned issues.

The paper at hand seeks to investigate sports brands' approach to sustainability by examining their product portfolio and their annual report data, analyzing their status quo and sustainability strategy. A content analysis is conducted employing the brands' annual reports and their online shops as data sources to assess their status quo in terms of sustainability as well as future plans.

Results show that on the ecological side, brands unanimously focus on carbon reduction, organic cotton, recycled polyester, circularity-ready business model innovation and water and toxic waste management. The social aspect may be divided into the focal brand and the supply chain, including similar measures: equality and diversity, the promotion of ethnic and cultural minorities and increased safety and health for workers.

The paper derives development opportunities and pitfalls for sports fashion brands.

This systematic review synthesizes the recent literature (2010–2020) on hospitality employees’ emotions, affect and moods. This study has three objectives: to clarify the definitions of emotions, affect and moods; to explain how theories are integrated into understanding hospitality employees’ emotions, affect and moods; and to assess how emotions, affect and moods are measured.

Using seven major databases, the authors selected 61 peer-reviewed academic journal articles published in hospitality outlets for review. We based our study on five stages of conducting a systematic review: scoping, planning, identification, screening and eligibility.

Affect is an umbrella term encompassing moods and emotions. Emotions are distinct from emotion-laden constructs, such as emotional labor and emotional intelligence. Theories on conservation of resources, emotional labor and social exchange have been most frequently used to understand hospitality employees’ emotions. However, they overlooked the dynamic nature of emotions when using these theories. Hospitality researchers often used a subset of the positive and negative affect scale and did not discuss back-translation.

Hospitality employees’ emotions lead to far-reaching consequences in attitudes, intentions and behaviors in work and non-work domains. Effective practices (e.g. creating a supportive climate) that help evoke positive employee emotions and reduce negative employee emotions are thus desirable.

Our findings crystallize the understanding of emotions, affect and moods of hospitality employees. We further provide a roadmap for future research on hospitality employees’ emotions. Data triangulation, cross-cultural research and mixed emotions are novel opportunities for future research.

This study draws on social stigma and prejudice to examine the perceptions and beliefs of managers and employees regarding visible tattoos and body piercings, as well as the impact they have on potential employment and human resource management in the global South, using Nigeria as the research context.

The study uses a qualitative research approach, drawing on data from 43 semi-structured interviews with employees and managers in Nigeria.

Contrary to the popular opinion that tattoos and body piercings are becoming more accepted and mainstream in society, this study finds that some Nigerian employers and employees may stigmatise and discriminate against people with visible tattoos and body piercings. The findings of this study suggest that beliefs about tattoos are predicated on ideologies as well as religious and sociocultural values, which then influence corporate values.

The extent to which the findings of this research can be generalised is constrained by the limited sample and scope of the research.

Religious and sociocultural preconceptions about people with visible tattoos and body piercings have negative implications for the recruitment and employment of such people and could prevent organisations from hiring and keeping talented employees. This implies that talented employees might experience prejudice at job interviews, preventing them from gaining employment. Furthermore, stigmatising and discriminating against people with visible tattoos and body piercings may lead to the termination of employment of talented employees, which could negatively affect organisational productivity and growth.

This study provides an insight into the employment relations regarding tattoos and body piercing in Nigeria. The study highlights the need for mild beliefs and positive perceptions about people with visible tattoos and unconventional body piercings. There should be a general tolerance of the individual preference for body art and physical appearance, and this tolerance should be incorporated in organisational policies, which are enactments of corporate culture.

Diversified trading networks have recently drawn a great deal of attention. In the process, the importance of diversity has perhaps been overemphasized. Using the trade in port wine from Portugal to Britain as an example, this essay attempts to show how a market once dominated by general, diversified traders was taken over by dedicated specialists whose success might almost be measured by the degree to which they rejected diversification to form a dedicated “commodity chain.” The essay suggests that this strategy was better able to handle matters of quality and the specialized knowledge that port wine required. The essay also highlights the question of power in such a chain. Endemic commodity-chain struggles are clearest in the vertical brand war that broke out in the nineteenth century, which, by concentrating power, marked the final stage in the transformation of the trade from network to vertical integration.