3 research outputs found
Design And Implementation Of A Signal Generator Using Microcontroller
No full textThis thesis discusses the development process and the common features of a microcontroller based signal generator which allows the user to select a waveform type (sine, square, sawtooth and triangle) and to select the waveform frequency and amplitude.Signal generator that generates different shapes of waveforms over a wide range of frequencies, is an important instrument in testing and operating different kinds of electrical equipments. It can provide a wide range of controlled amplitudes, and maintain constant amplitude as the frequency is varied. It is widely used in engineering applications especially in control field. This thesis discusses the development process and the common features of a microcontroller based signal generator which allows the user to select a waveform type (sine, square, sawtooth and triangle) and to select the waveform frequency and amplitude. Many hardware and software tools are involved in the design of the signal generator. Microcontroller is used to generate the signal and to display the frequency and the amplitude of the generated signal
Association of oral parafunctional habits with anxiety and the Big-Five Personality Traits in the Saudi adult population
No full textBackground: Oral parafunctional habits are related to any abnormal hyperactivity of the oromandibular system. They are prevalent in all societies in varying intensity and have potential physical and psychological implications. The aim of this study was twofold: (1) to determine the prevalence of various types of oral parafunctional habits in the Saudi adult population, and (2) to examine their association with and the level of anxiety and personality factors. Methods: This cross-sectional study was conducted with an electronic data collection form distributed to the public through social media. The questionnaire comprised of the following: (a) demographic information, (b) the Hamilton Anxiety Rating Scale (HAM-A), (c) the Ten-Item of Big-Five Personality Traits, (d) a list of oral parafunctional habits. Data were analysed using a Pearson's Chi square and binary logistic regression. Results: The participants reported several parafunctional habits including daily gum chewing (86%), lip/object biting (59%), clenching (45%), nail biting (36%) and grinding (32%). Males were 3 [2.3–3.7] times and younger age groups were 1.5 [1.1–2.0] times more likely to be associated with nail biting compared to their counter groups (adj.P < 0.001 and adj.P = 0.007). Lip/object biting was significantly 1.3 [1.1–1.7] times more prevalent in males (adj.P = 0.015). Participants who reported being extroverts were more likely to be associated with clenching (46.4%) (P = 0.024). An emotionally stable person was significantly less likely to be associated with nail biting (28.4%), grinding (24.9%), clenching (35.8%), and lip/object biting (48.4%) (P < 0.001each). Participants who reported conscientiousness and emotional stability were significantly less associated with TMD (P = 0.007, P < 0.001). Conclusion: Oral parafunctional habits are highly prevalent in the Saudi adult population in varying degrees. Possible risk factors include males, younger age groups, single people, and being financially constrained. © 2020 The Author
Trees, Shrubs and Grasses for Saltlands: an Annotated Bibliography
No full textResource /Energy Economics and Policy,
