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This study attempts to examine the relationships between leisure involvement, social support, and happiness. Consequently, for data collection, this study utilizes a convenient sampling procedure, involving a questionnaire survey on scuba divers in Kenting, a southern resort town in Taiwan. In this study, 320 samples of useful samples were collected. Structural equation modeling is deployed to test the underlying relationships among the research variables. Concerning the leisure involvement of the scuba diving participants, social support is viewed as an essential antecedent. This study confirms leisure involvement is a mediator between social support and happiness in the case of scuba diving. This study further confirms that the mediation effect of leisure involvement positively affects happiness. Furthermore, social support positively leads to leisure engagement (e.g., scuba diving) and could also directly influence happiness with a positive relationship. Consequently, this study renders managerial implications for the service providers of scuba diving.

Diving has become a popular tourism activity for professionals and novices. Coral reefs or other types of natural sources are still the most preferred diving sites. However, they are under threat for many reasons, for example, climate change, intensive human activities or commercial use. Many countries have promoted artificial reefs to protect coral reefs and create new attractions for tourists. These new underwater atmospheres have changed diving and diving experiences. Wrecks, vessels, monuments, hotels, sunken cities or other types of artificial reef forms invite divers to discover and explore the human-driven underwater environment with novelty seeking, photographic opportunities and mysterious surroundings. This atmospheric turn has brought many advantages to communities, stakeholders and nations with socio-economic benefits, advantages in sustainability management and destination image. This chapter examines the range of underwater atmospheres in different structures and countries and explores their potential benefits.

Globally, around one-third of food produced is wasted and thrown into supermarket bins or dumpsters. As a result, these dumpsters have become opportunistic sources of food through dumpster diving. The authors' scoping review aimed to document the people that are dumpster diving and why these people engage in this potentially illegal practice.

A database search spanning 12 years yielded 29 articles for review.

The authors' analysis uncovered two main themes for why people were dumpster diving: (1) motivations which included political activism against consumerism, materialism and capitalism, a fun and thrilling social activity and to alleviate food insecurity and (2) the benefits derived, such as gaining free food, saving money, sharing food with others and gaining attention from the public and media.

In conclusion, the review was unable to provide definitive information on “who” was dumpster diving; however, this limitation provides a unique opportunity for further research that focusses on the specific demographics of dumpster divers rather than the “why” people are diving.

Scuba diving tourism is reputed to be a potential low-impact recreational activity that allow environmental conservation and socioeconomic benefits for local communities. Few studies have addressed the issue of sustainability of scuba diving tourism through the simultaneously investigation on the economic and socio-cultural aspects and its implications for tourism development. This study aims to examine the scuba diving tourism in three under-explored North African tourism destinations with high ecotourist potential. The authors present an exploratory picture of scuba diving tourist demand, divers' preferences, motivations for recreational diving experiences and their propensity towards conservation.

The authors developed a case study research strategy collecting profile data on 123 divers. Furthermore, regression analysis was performed to investigate the divers' preferences, motivations and propensity towards conservation.

The divers' limited number, the presence of mainly local seasonal tourists and a moderate propensity towards conservation influence the potential of the diving tourism segment to generate significant socioeconomic benefits for local sustainable development in these destinations. However, establishing a marine protected area (MPA) could foster the development of a long-term strategy for scuba diving tourism, improve conservation awareness and increase divers' satisfaction.

Diverse profiles, preferences and motivations can provide tools to sustainably manage and preserve coastal and marine biodiversity, while also maximising the quality of the recreational experience. One of the most effective site-based strategies to orient the diving sector towards sustainability involves the design and strengthening of MPAs.

The research provides an original contribution to the debate on sustainable tourism strategies by demonstrating how the study of economic and socio-cultural aspects of scuba diving could provide guidelines to orient the tourism development of marine and coastal areas towards the principles of sustainability (also through the establishment of MPAs). The findings present an overview of the sustainability of the scuba diving tourism segment by investigating the preferences, motivations and inclination towards conservation among tourists for whom the diving experience is not a core holiday activity.

Recreational scuba diving is one of the fastest growing tourism industries around the world and has become a popular activity in Taiwan. Few studies focus on enduring involvement with a high risk or difficult activity specialization, so this study aims to explore the causal relationship between enduring involvement and specialization and seeks to explain sustained involvement in scuba diving activity as a recreation specialization.

This research selects four diving sites in Taiwan as survey locations, specifically Yeliou, Longdong, Kenting and Green Island. The questionnaire consists of three sections, including demographic information, enduring involvement and specialization. By analyzing the data collected from 810 scuba divers in Taiwan, structural equation modeling is used to examine the causal relationships among the variables.

The primary findings of this study are as follows: attraction positively affects divers’ commitment and lifestyle through joy, relaxation and sharing diving experiences; the results indicate that self-expression is associated with past experience of participating in scuba diving activity; and centrality indicates that participants’ daily life and recreation are related to each other and become central to their life. Results show that most theoretical hypotheses are supported, but there is no significant evidence of attraction impacting past experience or self-expression influencing commitment and lifestyle.

To the best of the authors’ knowledge, this study is the first to examine the causal influence of enduring involvement and specialization in the scuba diving context. The findings provide a solid theoretical basis for the study of sustained involvement motivation and behavior on specialization. Implications and recommendations for future research are discussed.

休闲水肺潜水是全球发展最快的旅游业之一, 已成为台湾的热门活动。很少有研究关注持续涉入高风险或困难活动的专门化, 因此本研究探讨持续涉入和专门化之间的因果关系, 并试图解释持续参与水肺潜水活动作为休闲专门化。

这项研究选择了台湾的四个潜水地点作为调查地点, 特别是野柳, 龙洞, 垦丁和绿岛。问卷分为三个部分, 包括人口统计信息, 持续参与和专门化。通过分析从台湾810名潜水员那里收集的数据, 使用结构方程模型检查变量之间的因果关系。

这项研究的主要发现是：（1）吸引力通过愉悦, 放松和分享潜水经历积极影响潜水员的承诺和生活方式; （2）结果表明自我表达与过去参加水肺潜水活动的经历有关（3）中心性表示参与者的日常生活和娱乐彼此相关, 并成为他们生活的中心。结果表明, 大多数理论假设均得到支持, 但没有显着证据表明吸引力会影响过去的经历或自我表达影响承诺和生活方式。

据我们所知, 本研究是第一个研究在潜水环境中持续涉入和专门化的因果关系影响的研究。研究结果为专门化持续参与动机和行为的研究提供了坚实的理论基础。 讨论了对未来研究的影响和建议。

El buceo recreativo es una de las industrias turísticas de más rápido crecimiento en todo el mundo y se ha convertido en una actividad popular en Taiwán. Pocos estudios se centran en la participación duradera con una especialización de actividad difícil o de alto riesgo, por lo que este estudio explora la relación causal entre la participación duradera y la especialización y busca explicar la participación sostenida en la actividad de buceo como una especialización recreativa.

Esta investigación selecciona cuatro sitios de buceo en Taiwán como lugares de estudio, específicamente Yeliou, Longdong, Kenting y Green Island. El cuestionario consta de tres secciones, que incluyen información demográfica, participación duradera y especialización. Al analizar los datos recopilados de 810 buzos en Taiwán, se utiliza un modelo de ecuaciones estructurales para examinar las relaciones causales entre las variables.

Los hallazgos principales de este estudio son: (1) la atracción afecta positivamente el compromiso y el estilo de vida de los buceadores a través de la alegría, la relajación y el intercambio de experiencias de buceo, (2) los resultados indican que la autoexpresión está asociada con la experiencia pasada de participar en actividades de buceo., y (3) la centralidad indica que la vida diaria y la recreación de los participantes están relacionadas entre sí y se vuelven centrales en su vida. Los resultados muestran que la mayoría de las hipótesis teóricas están respaldadas, pero no hay evidencia significativa de que la atracción afecte la experiencia pasada o la autoexpresión que influya en el compromiso y el estilo de vida.

Hasta donde sabemos, este estudio es el primero en examinar la influencia causal de la participación y la especialización duraderas en el contexto del buceo. Los hallazgos proporcionan una base teórica sólida para el estudio de la motivación y el comportamiento de participación sostenida en la especialización. Se discuten las implicaciones y recomendaciones para futuras investigaciones.

The purpose of this paper is to follow the general question, how technical rebreather divers ensure their survival during performing of highly demanding dives – and what organisations could learn from these practices. As one form of complex adaptive system, technical divers perform different routines before and during the dive. These practices are formally trained and also informally mediated and developed. After investigating theoretical concepts like high reliability organising, Safety-I and -II as well as organisational resilience management, the authors scope on the existing risk and resilience practices in technical rebreather diving. Finally, the insights of the empirical research are used to make the transfer to the field of management studies – and ask relevant questions regarding their applied resilience intelligence.

The empirical research is analysed by applying Hollnagel’s Functional Resonance Analysis Method (FRAM) which leads to the reconstruction of an extended resilience management model for technical rebreather diving. The model development bases on a field study which comprised 300 hours of observations.

The findings are depicted in an FRAM model that exactly shows how technical divers perform high reliability operations and thus manages and increase the resilience of their socio-technical system.

Research results show the depicted model and the potential learnings for organisations and organisational resilience. However, the research remains inductive and is qualitative. Deductive and quantitative research would enrich and complete the picture.

The research is informative and offers an interdisciplinary but comprehensive bridge between the specific high reliability organisations/resilience practice of technical divers and the potential learnings for organisations. Companies can take the identified categories and mechanisms to match them to their own resilience activities.

Increasing organisational resilience means to increase societal resilience and thus sustainability. The research aims to support this interdisciplinary learning process.

The originality lies in the research object itself (technical diving practices), that never has been researched with an FRAM before. It is an interesting, comprehensive and interdisciplinary show case that is used to derive practical considerations for companies to strengthen their organisational resilience.

This study aims to examine the relationship between recreation specialization and diver's underwater behavior in Perhentian Island.

Data were collected using a pilot survey on 50 divers in Perhentian Island. In‐depth interviews with several dive operators were also conducted to support the findings.

Specialized divers tend to recognize unacceptable behavior rather than less specialized divers. Skilled specialized divers tend not to touch the reefs and not to collect dead pieces of the corals compared to less skilled divers.

Specialization and skills of divers can be used as an input to study diver underwater behavior while simultaneously providing insights on coral preservation.

It is important to manage diver behavior as there are now several diving operators who offer unlimited diving packages catering to day and night diving from shore. Divers can minimize their impacts by practicing responsible diving behavior. Measures emanating from this study on diver underwater behavior may be implemented to encourage responsible scuba diving activity among divers and ensure longevity of the coral reefs.

This paper aims to examine how dumpster divers' practices and tension‐resolution strategies facilitate their construction of resistant‐consumer identities outside the dominant paradigm of consumer choice.

Interview data were interpreted with the assistance of relevant literature, netnography and observation.

By viewing ideological motivations as paramount, even divers initially having economic or psychological motivations are able to negotiate a positive hero identity. Sharing forms community and constructs a “self‐for‐others” narrative that accommodates the paradoxical need to consume while resisting.

The illegality of the practice prevented researcher participation. Examining the reacquisition of waste informs identity construction and consumer resistance, and suggests that corporate and public policies should facilitate waste reclamation.

This investigation, unlike prior research, does not examine only one set of motives nor only those who dive for food. Thus, this paper uncovers the complex inter‐relationships between ideological, economic and psychological motivations, permitting a more complete understanding of how divers' practices shape their identities.

ASSUME an aeroplane in pure dive, i.e. the motion of the centre of gravity of the aeroplane is purely vertical. The airscrew is stopped and the diving aeroplane may be treated like a diving glider. The only difference is in the value of drag. It is assumed that the aeroplane is infinitely stiff, wings are not subject to twisting, etc. The aeroplane starts to dive from a certain height h with a certain initial velocity vi which in a special case may be equal to zero. To calculate the velocity which the aeroplane will reach at the height x the Neumark formula is applied:

Motivated by the problems that the positioning error of strap-down inertial navigation system (SINS) accumulates over time and few sensors are available for midwater navigation, this paper aims to propose a self-aided SINS scheme for the spiral-diving human-occupied vehicle (HOV) based on the characteristics of maneuvering pattern and SINS error propagation.

First, the navigation equations of SINS are simultaneously executed twice with the same inertial measurement unit (IMU) data as input to obtain two sets of SINS. Then, to deal with the horizontal velocity provided by one SINS, a delay-correction high-pass filter without phase shift and amplitude attenuation is designed. Finally, the horizontal velocity after processing is used to integrate with other SINS.

Simulation results indicate that the horizontal positioning error of the proposed scheme is less than 0.1 m when an HOV executes spiral diving to 7,000 meters under the sea and it is inherently able to estimate significant sensors biases.

The proposed scheme can provide a precise navigation solution without error growth for spiral-diving HOV on the condition that only IMU is required as a navigation sensor.