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Submitted by GIOVANNA SOUZA PEREIRA (giovanna_adm@yahoo.com.br) on 2017-01-10T11:26:51Z No. of bitstreams: 1 Giovanna_Dissertacao_Completa.pdf: 1941720 bytes, checksum: 466d875b691c76ca9d764f7ff136310e (MD5) / Approved for entry into archive by Maria Almeida (maria.socorro@fgv.br) on 2017-01-17T11:47:31Z (GMT) No. of bitstreams: 1 Giovanna_Dissertacao_Completa.pdf: 1941720 bytes, checksum: 466d875b691c76ca9d764f7ff136310e (MD5) / Made available in DSpace on 2017-01-17T11:48:39Z (GMT). No. of bitstreams: 1 Giovanna_Dissertacao_Completa.pdf: 1941720 bytes, checksum: 466d875b691c76ca9d764f7ff136310e (MD5) Previous issue date: 2016-12-06 / There are several approaches and theoretical perspectives that attempt to explain the impact of the relationship between leaders and followers in individual and organizational results. However, there are few studies that aim to determine important characteristics of a leader that can affect the quality of this relationship and, consequently, the results. This study contributes to research in this area, analyzing the impact of the leader humility on performance and organizational citizenship behavior (OCB) of employees, mediated by quality of the leadermember relationship. The research hypotheses proposed exploit the leader-member exchange (LMX) as a means through which the leader humility influences the results of subordinates. In addition, it is proposed that managerial efficacy moderates the relationship between leader humility and LMX. To test the empirical validity of the proposed model, a field study was conducted in an oil, natural gas and energy Brazilian company. The proposed relations were examined in a sample of 196 employees from the operational area of two oil refineries, with application of a structured closed questionnaire and use of the quantitative data analysis method. In general, results provide support for the proposed hypothesis, suggesting that the higher humility leader, the better their relationship with members and, hence, the better the results of performance and organizational citizenship behavior of employees. Contributions, theoretical and practical implications, limitations and directions for future research are offered. / Diversas são as abordagens e perspectivas teóricas que buscam explicar o impacto da relação entre líderes e liderados nos resultados individuais e organizacionais. No entanto, ainda são poucas as pesquisas que têm como objetivo determinar características importantes do líder que podem afetar a qualidade dessa relação e, consequentemente, os resultados. O presente estudo contribui para a pesquisa nessa área ao analisar o impacto da humildade do líder no desempenho e no comportamento de cidadania organizacional (OCB) dos empregados, mediado pela qualidade da relação entre líderes e liderados. As hipóteses de pesquisa propostas exploram a qualidade da relação líder-liderado (LMX) como meio através do qual a humildade do líder influencia os resultados dos subordinados. Além disso, propõe-se uma relação de moderação da eficácia gerencial na relação entre humildade do líder e LMX. Para testar a validade empírica do modelo proposto, foi realizado um estudo de campo em uma empresa brasileira da indústria de óleo, gás natural e energia. As relações propostas foram examinadas em uma amostra de 196 empregados da área operacional de duas refinarias de petróleo, com aplicação de um questionário fechado estruturado e utilização do método quantitativo de análise de dados. De maneira geral, os resultados fornecem suporte para as hipóteses propostas, sugerindo que, quanto maior a humildade do líder, melhor sua relação com os liderados e, consequentemente, melhores os resultados de desempenho e de comportamento de cidadania organizacional dos empregados. Contribuições, implicações teóricas e práticas, limitações e direções para futuras pesquisas são oferecidas.

The purpose of this thesis was to provide an understanding of the underlying motives behind students’ voluntary work at a student nation. It was carried out as a qualitative case study, where the focus was placed on Östgöta nation workers. Östgöta nation represents one of the thirteen student nations found in Uppsala, Sweden. The theoretical review draws upon four concepts, namely, intrinsic motivation, extrinsic motivation, organisational identification, and organisational citizenship behaviour. Consequently, these four concepts were used to construct a theoretical model, which served as a framework to understand what factors affect worker motives. Empirical material was collected through the conduct of one focus group and five individual interviews, and was subsequently analysed using a thematic approach. Our findings suggest that the underlying reasons behind a student’s work motives are their inherent need to socialize, as well as to belong to a social group. In addition, workers tend to develop a high degree of relatedness between one another. This, in turn, leads them to exhibit behaviour, where they over-perform and help each other. The presence of such behaviour in the workplace, in conjunction with non-monetary rewards, provides us with an understanding of how students motivate their decision of working in a student nation. In conclusion, we advocate student nations to foster altruism and solidarity within their work environment, which would improve their capability of securing and maintaining a sufficient workforce.

Occupational stressors have been extensively studied as predictors of safety performance and employee well-being in previous research. However, many newly introduced organizational constructs that have the characteristics of an occupational stressor have rarely been studied as such, especially from a within-person perspective. The current study focused on three occupational stressors in relation to safety performance. Based on previous literature, I proposed that within individuals, compulsory citizenship behavior, illegitimate tasks, and interpersonal conflict at work as occupational stressors would have negative effects on employees well-being and safety performance through negative emotions (anger), job attitudes (job satisfaction and organizational commitment) and role stressors (role conflict and role ambiguity). In addition, reception of organizational citizenship behavior (ROCB) and perceived safety climate were hypothesized to moderate the relationships of the three occupational stressors with safety performance and employee well-being. Seventy-one nurses were recruited, and data were collected from their survey responses about their daily experiences on the focal variables for 9 shifts over three consecutive working weeks. Results showed that within individuals, the three occupational stressors were positively associated with employee burnout and physical symptoms, and evidence was found that those associations might be mediated by anger, job satisfaction and role conflict. Further, ROCB was found to moderate some of the associations of occupational stressors with safety performance and employee well-being. However, the current study failed to find support for any of the hypotheses regarding perceived safety performance as a moderator in this sample. Findings, limitations and future directions were discussed.

The concept of wireless sensor network (WSN) is where tiny devices (sensor nodes), positioned fairly close to each other, are used for sensing and gathering data from its environment and exchange information through wireless connections between these nodes (e.g. sensor nodes distributed through out a bridge for monitoring the mechanical stress level of the bridge continuously). In order to easily deploy a relatively large quantity of sensor nodes, the sensor nodes are typically designed for low price and small size, thereby causing them to have very limited resources available (e.g. energy, processing power). Over the years, different security (cryptographic) primitives have been proposed and refined aiming at utilizing modern processor’s power e.g. 32-bit or 64-bit operation, architecture such as MMX (Multi Media Extension) and etc. In other words, security primitives have targeted at high-end systems (e.g. desktop or server) in software implementations. Some hardware-oriented security primitives have also been proposed. However, most of them have been designed aiming only at large message and high speed hashing, with no power consumption or other resources (such as memory space) taken into considerations. As a result, security mechanisms for ultra-low power (<500µW) devices such as the wireless sensor nodes must be carefully selected or designed with their limited resources in mind. The objective of this project is to provide implementations of security primitives (i.e. encryption and authentication) suitable to the WSN environment, where resources are extremely limited. The goal of the project is to provide an efficient building block on which the design of WSN secure routing protocols can be based on, so it can relieve the protocol designers from having to design everything from scratch. This project has provided three main contributions to the WSN field.  Provides analysis of different tradeoffs between cryptographic security strength and performances, which then provide security primitives suitable for the needs in a WSN environment. Security primitives form the link layer security and act as building blocks for higher layer protocols i.e. secure routing protocol.  Implements and optimizes several security primitives in a low-power microcontroller (TI MSP430F1232) with very limited resources (256 bytes RAM, 8KB flash program memory). The different security primitives are compared according to the number of CPU cycles required per byte processed, specific architectures required (e.g. multiplier, large bit shift) and resources (RAM, ROM/flash) required. These comparisons assist in the evaluation of its corresponding energy consumption, and thus the applicability to wireless sensor nodes.  Apart from investigating security primitives, research on various security protocols designed for WSN have also been conducted in order to optimize the security primitives for the security protocols design trend. Further, a new link layer security protocol using optimized security primitives is also proposed. This new protocol shows an improvement over the existing link layer security protocols. Security primitives with confidentiality and authenticity functions are implemented in the TinyMote sensor nodes from the Technical University of Vienna in a wireless sensor network. This is to demonstrate the practicality of the designs of this thesis in a real-world WSN environment. This research has achieved ultra-low power security primitives in wireless sensor network with average power consumption less than 3.5 µW (at 2 second packet transmission interval) and 700 nW (at 5 second packet transmission interval). The proposed link layer security protocol has also shown improvements over existing protocols in both security and power consumption. / Dissertation (MEng (Computer Engineering))--University of Pretoria, 2008. / Electrical, Electronic and Computer Engineering / unrestricted

Background: The COVID-19 pandemic reshaped part of the labor market, causing an increase in remote work and consequently the rise of “quiet quitting”. Quiet quitting refers to when an employee does the bare minimum at work, and the specific reasons for its rise, vary, however, there is reason to believe that remote work can be a contributing factor due to its effect on social connections and motivation.    Purpose: The purpose of this thesis is to investigate the relationship between working from home and quiet quitting, and how digital leadership can affect job satisfaction. This is because employers need to recognize and address the contributing factors of quiet quitting to be able to keep job satisfaction. Method: This thesis is a qualitative study using an interpretivist method. The research has been performed though an inductive research approach. The primary data were gathered though 20 semi-structured interviews with 10 companies form various industries located in Småland Sweden. A person in a leading position and an employee were interviewed from each organization and a thematic analysis approach was used to analyze the data.    Conclusion: The result from our findings showed that remote work has a significant impact on employee job satisfaction. Many employees experienced a lack of support and feedback from their managers and colleagues, as well as lower cohesion, which many perceived effected their motivation and increase the risk of quiet quitting.  That is why managers should focus on creating “digital cohesion” by reworking their digital work, improving digital communication, and improving digital feedback. This may result in employees feeling more appreciated and committed to the organization, thus mitigating the risk of quiet quitting.

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This graduation thesis focuses on the identification of key sources of Organizational Citizenship Behaviour (OCB) which are present in a chosen organization. The outcome of this work contains a list of factors which have supporting or adverse effect on OCB usage. The thesis also includes recommendations for arrangements of the working environment which would increase the willingness of the employees to exhibit OCB.