Numerous papers examine the relationship between gacha mechanics and gambling, however, few enquire about what attracts players to gacha games. This is the focus of this thesis, asking players, from their perspective, what are the elements of gacha games that keep them engaged. It also queries why, after having stopped playing gacha games for a period of time, players return to these games. Data was gathered through semi-structured interviews with five players who play gacha games at least 20 hours a week and who took a break from these games for at least one month. Results indicate that players are initially attracted to gacha games due to their aesthetic and that players value narrative elements associated with the games and the gacha characters. Interestingly, the gacha mechanic itself was not pointed out as the reason for engaging with the game, rather it is used as a means to acquire a desired ingame item. Nonetheless, strong emotional attachment is associated with successful and unsuccessful pulls; a low amount of pulls to acquire a desired character or item is described as a strong joyful memory, whereas not being able to acquire the desired gacha character or item despite a large number of pulls is associated with intense frustration and sadness. Collectionism was pointed out by players as a motivation for acquiring gacha items, with players placing a higher value on items they need to complete their collection rather than necessarily on high-rated game items. The results also indicate that burnout can occur when a game stops or slows the release of new content, eventually leading players to stop playing that game.

Sistemas push-pull são caracterizados pela presença de uma transição eletrônica de transferência de carga, o que justifica a grande diferença de polaridade entre os estados fundamental e excitado. Isso os torna sondas moleculares promissoras para a obtenção de informações espectroscópicas sobre a fase condensada. Alguns desses sistemas apresentam modos vibracionais cuja frequência depende da energia de excitação nos espectros Raman. Neste estudo, através de uma sonda molecular push-pull, objetivou-se analisar as características do meio que definem tal dependência. A sonda utilizada, 4-dimetilamino-β-nitroestireno apresentou deslocamento batocrômico no espectro de absorção eletrônico e a dependência da largura de banda com o solvente, o que mostrou sua sensibilidade ao meio, juntamente com uma dependência do modo de estiramento simétrico do grupo nitro com o solvente. Através do modelo do estado de solvatação seletivo, variando a energia de excitação do laser, foi possível observar a dependência do número de onda do modo de estiramento simétrico do NO2. Essa dependência foi, no entanto, mais significativa em solventes próticos polares, os quais apresentam os maiores valores de tempo de relaxação do solvente. Alguns solventes polares apróticos também apresentaram, mas com menor deslocamento, o que poderia estar relacionado com o tempo de relaxação. Solventes com dinâmicas de solvatação mais lentas e com forte interação, provocando uma diminuição na energia de transição eletrônica, são os principais fatores para ocorrência da dispersão Raman em sistemas push-pull. / The push-pulls systems are characcterized by the presence of a charge transfer electronic transition, it explain the large difference in polarity between the ground and excited states. They are promising molecular probes to obtain spectroscopic information on the condensed phase because of that characteristic. Some of these systems have vibrational modes whose frequency depends on the excitation energy in the resonant Raman spectra. The objective of this study was to analyze the vibrational frequency dependence of the molecular probe caused by environment. The 4-dimethylamino-β-nitrostyrene as a probe was sensitive to the medium showing bathochromic shift on electronic spectrum and bandwidth dependence with the solvent as well as the dependency of the nitro symmetric stretching mode in the vibrational spectrum. Based on the selective solvation state model, the laser excitation energy was varied and the dependence of the wave number of the symmetric stretching mode NO2 was observed. This dependency is, however, more significant in polar protic solvents which have the highest relaxation time values of the solvent. Some aprotic polar solvents presented that characteristic with less degree, which may be related to the relaxation time. The main factor for the occurrence of Raman scattering in push-pull solvation systems is the slower solvation dynamics and strong interaction that are capable to diminishing the energy electronic transition. The main factors for the occurrence of Raman dispersion in push-pull solvation systems are the slower solvation dynamics and strong probe/solvent interaction that are capable to diminishing the electronic transition energy.

Children diagnosed with Attention Deficit Hyperactive Disorder (ADHD) are often secluded from society, as the condition is perceived to be a defect. These children constantly fidget, move, lose track of time, and forget to complete tasks, leading them to struggle within existing social environments. Additionally, in Qatar there is a need to educate society about ADHD. This research explores wearable solutions that alter behaviors through physical interactions and sensory engagements. In response to the challenges faced by ADHD, Qatari traditional attire has been customized to support children with time management, and communication between child, parent, and society. Additionally, these wearables challenge Qatari perspectives surrounding existing health conditions in Qatar. Design outcomes consists of clothing elements, driven and shaped by the experiences of ADHD children, their physical behavior, their senses like touch, smell and sight. It addresses the daily conduct of the ADHD child, and the relationship of the child and parent. By challenging existing norms and analyzing the Qatari traditional clothing (the Thobe, the Abaya and the Prayer Bead), design outcomes have been realized by experimenting and playing with materials, prototyping and 3D printing on fabric. Existing functions of zippers, pockets, beads, cuffs and technical construction of the outfit have been redesigned and reconstructed.

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Sistemas push-pull são caracterizados pela presença de uma transição eletrônica de transferência de carga, o que justifica a grande diferença de polaridade entre os estados fundamental e excitado. Isso os torna sondas moleculares promissoras para a obtenção de informações espectroscópicas sobre a fase condensada. Alguns desses sistemas apresentam modos vibracionais cuja frequência depende da energia de excitação nos espectros Raman. Neste estudo, através de uma sonda molecular push-pull, objetivou-se analisar as características do meio que definem tal dependência. A sonda utilizada, 4-dimetilamino-β-nitroestireno apresentou deslocamento batocrômico no espectro de absorção eletrônico e a dependência da largura de banda com o solvente, o que mostrou sua sensibilidade ao meio, juntamente com uma dependência do modo de estiramento simétrico do grupo nitro com o solvente. Através do modelo do estado de solvatação seletivo, variando a energia de excitação do laser, foi possível observar a dependência do número de onda do modo de estiramento simétrico do NO2. Essa dependência foi, no entanto, mais significativa em solventes próticos polares, os quais apresentam os maiores valores de tempo de relaxação do solvente. Alguns solventes polares apróticos também apresentaram, mas com menor deslocamento, o que poderia estar relacionado com o tempo de relaxação. Solventes com dinâmicas de solvatação mais lentas e com forte interação, provocando uma diminuição na energia de transição eletrônica, são os principais fatores para ocorrência da dispersão Raman em sistemas push-pull. / The push-pulls systems are characcterized by the presence of a charge transfer electronic transition, it explain the large difference in polarity between the ground and excited states. They are promising molecular probes to obtain spectroscopic information on the condensed phase because of that characteristic. Some of these systems have vibrational modes whose frequency depends on the excitation energy in the resonant Raman spectra. The objective of this study was to analyze the vibrational frequency dependence of the molecular probe caused by environment. The 4-dimethylamino-β-nitrostyrene as a probe was sensitive to the medium showing bathochromic shift on electronic spectrum and bandwidth dependence with the solvent as well as the dependency of the nitro symmetric stretching mode in the vibrational spectrum. Based on the selective solvation state model, the laser excitation energy was varied and the dependence of the wave number of the symmetric stretching mode NO2 was observed. This dependency is, however, more significant in polar protic solvents which have the highest relaxation time values of the solvent. Some aprotic polar solvents presented that characteristic with less degree, which may be related to the relaxation time. The main factor for the occurrence of Raman scattering in push-pull solvation systems is the slower solvation dynamics and strong interaction that are capable to diminishing the energy electronic transition. The main factors for the occurrence of Raman dispersion in push-pull solvation systems are the slower solvation dynamics and strong probe/solvent interaction that are capable to diminishing the electronic transition energy.