Academic literature on the topic 'Rhythm of the day'
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Journal articles on the topic "Rhythm of the day"
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Farr, Lynne, Catherine Todero, and Lonna Boen. "Reducing Disruption of Circadian Temperature Rhythm Following Surgery." Biological Research For Nursing 2, no. 4 (April 2001): 257–66. http://dx.doi.org/10.1177/109980040100200405.
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Temperature and other circadian rhythms are disrupted following surgery and other traumatic events. During recovery, coordination between temperature rhythms and other rhythmic physiologic processes is reduced. Studies of animals and humans have shown that return of synchrony is not immediate, but that it is important in the recovery process. The purpose of this study was to test a combination of cues that have been shown to adjust the timing of circadian temperature rhythm. The combined cues consisted of timed ingestion of caffeine and protein foods and adjustment of the sleep/wake cycle. The intervention was tested in 26 age-and gender-matched maxillofacial surgery patients. Patients were randomly assigned to control or experimental groups. Circadian temperature rhythm was measured by continuous monitoring with axillary probes and miniature recorders before and after surgery. Following surgery, both experimental and control subjects displayed 24-hour circadian temperature rhythms; however, the peak-to-trough difference was decreased more following surgery in the control subjects than in the subjects who had prepared for surgery by practicing the intervention. Control subjects also had less day-to-day stability in the phase of their rhythms following surgery. These results suggest that the intervention reduced circadian disruption following surgery and provides a way for patients to prepare themselves to resist rhythm changes.
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Kubištová, Aneta, Veronika Spišská, Lucie Petrželková, Leona Hrubcová, Simona Moravcová, Lenka Maierová, and Zdeňka Bendová. "Constant Light in Critical Postnatal Days Affects Circadian Rhythms in Locomotion and Gene Expression in the Suprachiasmatic Nucleus, Retina, and Pineal Gland Later in Life." Biomedicines 8, no. 12 (December 7, 2020): 579. http://dx.doi.org/10.3390/biomedicines8120579.
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The circadian clock regulates bodily rhythms by time cues that result from the integration of genetically encoded endogenous rhythms with external cycles, most potently with the light/dark cycle. Chronic exposure to constant light in adulthood disrupts circadian system function and can induce behavioral and physiological arrhythmicity with potential clinical consequences. Since the developing nervous system is particularly vulnerable to experiences during the critical period, we hypothesized that early-life circadian disruption would negatively impact the development of the circadian clock and its adult function. Newborn rats were subjected to a constant light of 16 lux from the day of birth through until postnatal day 20, and then they were housed in conditions of L12 h (16 lux): D12 h (darkness). The circadian period was measured by locomotor activity rhythm at postnatal day 60, and the rhythmic expressions of clock genes and tissue-specific genes were detected in the suprachiasmatic nuclei, retinas, and pineal glands at postnatal days 30 and 90. Our data show that early postnatal exposure to constant light leads to a prolonged endogenous period of locomotor activity rhythm and affects the rhythmic gene expression in all studied brain structures later in life.
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McGoogan, Jennifer M., and Vincent M. Cassone. "Circadian regulation of chick electroretinogram: effects of pinealectomy and exogenous melatonin." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 277, no. 5 (November 1, 1999): R1418—R1427. http://dx.doi.org/10.1152/ajpregu.1999.277.5.r1418.
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Melatonin is an important component of the avian circadian system. This study investigates the effects of pinealectomy (Pin-X) and melatonin implantation (Mel) on electroretinogram (ERG) rhythms in chicks. Feeding rhythms were monitored to obtain a phase reference for ERG recordings. Pin-X and Mel had little or no effect on feeding rhythms. Sham-operated Pin-X and vehicle implantation had no effect on ERG rhythms in the light-dark (LD) cycle or constant darkness (DD). ERG a- and b-wave amplitudes were higher during the day than during the night. The a- and b-wave implicit times were shorter during the day than during the night. a-Wave sensitivity was higher during the night than during the day, whereas b-wave sensitivity was not rhythmic. Pin-X abolished the circadian rhythm of b-wave amplitude and implicit time in DD but had no effect on a-wave rhythmicity. Mel abolished the rhythm of b-wave amplitude and of a- and b-wave implicit time in DD. Neither treatment affected ERG in LD. These results suggest that the circadian system regulates rhythmic visual function in the retina at least partially through Mel. The role played by the pineal gland and Mel may be specific to some physiological modalities (e.g., vision) while not influencing others (e.g., feeding).
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Dosseville, Fabrice, Sebastien Moussay, Jacques Larue, Antoine Gauthier, and Damien Davenne. "Physical Exercise and Time of Day: Influences on Spontaneous Motor Tempo." Perceptual and Motor Skills 95, no. 3 (December 2002): 965–72. http://dx.doi.org/10.1177/003151250209500301.
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To identify whether spontaneous motor rhythm is influenced by external or internal events and whether this rhythm fluctuates across the day in parallel with heart rate diurnal variations, we simultaneously recorded heart rate and spontaneous motor rate before and after a pedaling task performed five times a day by 10 healthy human subjects. Each subject performed a Spontaneous Motor Tempo, i.e., a finger-tapping task, at a comfortable and spontaneous cadence. Pre- and postexercise Spontaneous Motor Tempo was measured as well as heart rate. There were diurnal variations in Spontaneous Motor Tempo. Both measures increased significantly after pedaling, suggesting that cardiac and spontaneous rhythms are influenced simultaneously after a moderate exercise. Also, finger-taps occurred most frequently around the initiation of the heart systole. These results suggest that a putative internal clock might regulate Spontaneous Motor Tempo and that cardiac rhythm might influence this tempo
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Keeney, Hillary, and Bradford Keeney. "The Rhythm Detox: A shaking body reset and fascinating rhythm infusion." Dance, Movement & Spiritualities 7, no. 1-2 (November 1, 2020): 7–16. http://dx.doi.org/10.1386/dmas_00012_1.
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Rhythm not only connects the notes of a song into pleasing melody, it also organizes much of our everyday experience. Everything has an underlying rhythm including speech, thoughts and how bodies move through space. When people feel stuck, lifeless or in need of a creative inspirational reset, we propose paying more attention to the rhythms organizing their somatic expression rather than only attending to inner psychological states. This can be done through what we call a ‘Rhythm Detox’, a brief two-step movement practice. Step one begins with a simple body shake performed without listening to any percussion. Step two involves playing a recording of any lively, syncopated rhythms and enacting a unique means of catching the surprising changes and off beats. This experimental means of resourcefully interrupting, shaking up and reinvigorating the rhythms organizing your daily movement habits can be done alone or with others and as often as needed throughout the day.
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DOYLE, SUSAN E., MICHAEL S. GRACE, WILSON McIVOR, and MICHAEL MENAKER. "Circadian rhythms of dopamine in mouse retina: The role of melatonin." Visual Neuroscience 19, no. 5 (September 2002): 593–601. http://dx.doi.org/10.1017/s0952523802195058.
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Both dopamine and melatonin are important for the regulation of retinal rhythmicity, and substantial evidence suggests that these two substances are mutually inhibitory factors that act as chemical analogs of day and night. A circadian oscillator in the mammalian retina regulates melatonin synthesis. Here we show a circadian rhythm of retinal dopamine content in the mouse retina, and examine the role of melatonin in its control. Using high-performance liquid chromatography (HPLC), we measured levels of dopamine and its two major metabolites, 3,4-dihydroxyphenylacetic acid (DOPAC) and homovanillic acid (HVA), in retinas of C3H+/+ mice (which make melatonin) and C57BL/6J mice that are genetically incapable of melatonin synthesis. In a light/dark cycle both strains of mice exhibited daily rhythms of retinal dopamine, DOPAC, and HVA content. However, after 10 days in constant darkness (DD), a circadian rhythm in dopamine levels was present in C3H, but not in C57 mice. C57 mice given ten daily injections of melatonin in DD exhibited a robust circadian rhythm of retinal dopamine content whereas no such rhythm was present in saline-injected controls. Our results demonstrate that (1) a circadian clock generates rhythms of dopamine content in the C3H mouse retina, (2) mice lacking melatonin also lack circadian rhythms of dopamine content, and (3) dopamine rhythms can be generated in these mice by cyclic administration of exogenous melatonin. Our results also indicate that circadian rhythms of retinal dopamine depend upon the rhythmic presence of melatonin, but that cyclic light can drive dopamine rhythms in the absence of melatonin.
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Xia, Canwei, and Yanyun Zhang. "Lack of daily heart rate rhythms in Adélie penguin chicks during the polar day." Polar Record 55, no. 6 (November 2019): 411–16. http://dx.doi.org/10.1017/s0032247420000017.
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AbstractDaily rhythms enable organisms to adapt to daily fluctuations in environmental factors. Do organisms still exhibit 24-h rhythms when living in habitats without obvious daily cycles in external signals? To answer this question, we measured the heart rates of six Adélie penguin (Pygoscelis adeliae) chicks on Inexpressible Island during the polar day between 15 and 21 January 2019. Averaged heart rates were between 186 and 233 beats/min for individual chicks. Both fast Fourier transformation and autocorrelation were employed to assess the daily rhythmicity. Based on fast Fourier transformation, a significant contribution of daily rhythm in heart rate variation was found only in one individual. Small effect size of significant autocorrelation coefficients was found in two individuals, while there was no significant autocorrelation coefficient for 24-h time lag in four other individuals. In summary, no prevailing daily rhythm of heart rate was found in these Adélie penguin chicks. We propose that the lack of daily rhythm in Adélie penguin chicks could be an adaptation to the local environment in the polar regions, but that the adaptive value thereof remains to be investigated.
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Huffeldt, Nicholas Per, and Flemming R. Merkel. "Sex-specific, inverted rhythms of breeding-site attendance in an Arctic seabird." Biology Letters 12, no. 9 (September 2016): 20160289. http://dx.doi.org/10.1098/rsbl.2016.0289.
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In contrast to daily rhythms that are common in the presence of the geophysical light–dark cycle, organisms at polar latitudes exhibit many diel activity patterns during natural periods of continuous solar light or darkness (polar day and night, respectively), from 24 h rhythms to arrhythmicity. In Arctic Greenland (73.7° N, 56.6° W) during polar day, we observed breeding-site attendance rhythms of thick-billed murres ( Uria lomvia ; n = 21 pairs), a charadriiform seabird, which provide biparental care at the colony. We found that U. lomvia egg-incubation and chick-brooding attendance is rhythmic and synchronized to the geophysical day (mean period length [rhythm duration] ± 95% confidence interval = 24.13 ± 0.52 h). Individual pair members had temporally segregated, sex-specific colony-attendance rhythms that were opposite (inverted) to each other, and these sex-specific rhythms were prominent at the population level. Our results provide a basis for investigating circadian systems at polar latitudes and sex-specific parental-care strategies.
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Cambras, T., M. M. Canal, A. Torres, J. Vilaplana, and A. Diez-Noguera. "Manifestation of circadian rhythm under constant light depends on lighting conditions during lactation." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 272, no. 4 (April 1, 1997): R1039—R1046. http://dx.doi.org/10.1152/ajpregu.1997.272.4.r1039.
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Adult rats transferred to continuous illumination (LL) show a disruption of circadian rhythms, although the mechanisms underlying this effect are not yet well known. In previous experiments, we found that when rats were born and raised under LL they showed an ultradian pattern during the first 10 days after weaning, but afterward they generated a circadian rhythm that was maintained until adulthood. It was not clear whether this evolution was attributable to the influence of the rhythm of the mother or to the effect of constant light. Here, we have studied the motor activity rhythm of young rats maintained under LL after weaning, taking into account the conditions to which they were exposed during lactation [LL or continuous darkness (DD)]. To check the possible effect of the rhythm of the dam, on the day of delivery some of the dams were blinded, others were subjected to a restricted feeding schedule of 3 h/day, and the others were used as controls. For each rat, the period of the circadian rhythm and the percentage of variance explained by this rhythm were calculated. Results show that all rats maintained under LL during lactation expressed a circadian rhythm in their motor activity. However, rats maintained under DD during lactation did not. This effect did not seem to be dependent on the type of dam. These results suggest that the rhythm of the dams does not affect the manifestation of the rhythm of the pups and that the expression of circadian rhythmicity under constant bright light depends on the lighting conditions under which the animals were maintained during lactation, which could affect the development of the circadian pacemaker or the retina.
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Yvert, Blaise, Pascal Branchereau, and Pierre Meyrand. "Multiple Spontaneous Rhythmic Activity Patterns Generated by the Embryonic Mouse Spinal Cord Occur Within a Specific Developmental Time Window." Journal of Neurophysiology 91, no. 5 (May 2004): 2101–9. http://dx.doi.org/10.1152/jn.01095.2003.
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Spontaneous rhythmic activity is a ubiquitous phenomenon in developing neural networks and is assumed to play an important role in the elaboration of mature circuitry. Here we describe the day-by-day evolution of spontaneous activity in the embryonic mouse spinal cord and show that, at a specific developmental stage, 2 distinct rhythms coexist. On embryonic days E12.5 and E13.5, we observed a single type of regularly recurring short spike-episodes synchronized across cervical, thoracic, and lumbar levels. By E14.5, in addition to this motor rhythm, another type of spontaneous synchronous activity appeared, characterized by much longer lasting episodes separated by longer time intervals. On E15.5, these long episodes disappeared. Short episodes were less numerous and more irregular except at the cervical level where a rhythm was occasionally observed. By E16.5, this cervical rhythm became more robust, whereas the lumbar level fell almost silent. Surprisingly, at E17.5, spontaneous activity resumed at caudal levels, now characterized by numerous erratic short episodes. A striking ontogenetic feature of spontaneous activity was the occurrence of long episodes only at E14.5. Although concomitant at all levels of the spinal cord, long episodes displayed different patterns along the spinal cord, with tonic firing at the thoracic level and rhythmic discharge with occasional sequences of left/right alternation at the lumbar level. Thus at E14.5, the originally synchronized network has started to segregate into more specialized subnetworks. In conclusion, this work suggests that ongoing spontaneous rhythms do not follow a smooth evolution during maturation, but rather undergo profound changes at very specific stages.
Dissertations / Theses on the topic "Rhythm of the day"
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Degerfeldt, Anton. "It's About a Day : The Effect of Glucocorticoids on Shifting and Re-entraining the Circadian Rhythm in Peripheral Cells: A Review and Meta-Analysis." Thesis, Högskolan i Skövde, Institutionen för biovetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-17306.
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The circadian rhythm is a rhythm which permeates all aspects of biological life and follows the hours of the sun. The pace of the rhythm is controlled by a collection of neurons in the hypothalamus, called the suprachiasmatic nucleus (SCN), whose signals affect rhythms throughout the body as can be seen in aspects of life from behavior down to oscillations of proteins in the cells. A disruption of this rhythm such as what happens during jet lag, where the rhythm of the SCN is out of synch with the rhythm of the rest of the body, is something that can have adverse effects on mental and physical health. To realign the SCN and the rhythm of the body, different methods and be implemented. This thesis investigated the effectiveness of glucocorticoids on re-aligning the rhythms of the body following a disruption through a meta-analysis and a qualitative review. The meta-analysis and review incorporated experiments from six articles investigating the hours of circadian rhythm shifts in the mouse model, after administering glucocorticoids. What was found was that the individual experiments presented results with high effect sizes; however, the direction of said effects was not uniform as the rhythms shifted in different directions. The lack of uniform direction caused no significant combined effect size to be found by this meta-analysis (MES=0.11 ± 0.06), showing that a statistical analysis based on hours shifted could not find a significant combined effect. The qualitative review, however, indicates that the administration of glucocorticoids shows an effect in re-entraining the rhythm of the peripheral parts of the body to that of the environmental cues and the SCN. Though no significant statistical effect was found in this analysis, the effect of glucocorticoids should not be discounted and could still prove a promising treatment for circadian disruptions, such as jet lag.
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Wells, Christine Renée. "The effect of time of day on emotionality /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC IP addresses, 1997. http://wwwlib.umi.com/cr/ucsd/fullcit?p9811984.
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Blood, Mary Lee. "A comparison of circadian rhythms in day and night shift workers." PDXScholar, 1990. https://pdxscholar.library.pdx.edu/open_access_etds/3991.
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The present study examined whether and to what extent physiological rhythms of long-term . night workers become adapted to their unconventionally scheduled hours of work and sleep and how the degree of adaptation would be reflected in ratings of sleep quality, mood, anxiety, energy and satisfaction.
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Berezuk, André Geraldo [UNESP]. "Análise das adversidades climáticas no oeste paulista e norte do Paraná." Universidade Estadual Paulista (UNESP), 2007. http://hdl.handle.net/11449/102967.
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berezuck_ag_dr_prud.pdf: 3585867 bytes, checksum: 369d960412156cb7787dd35cbfac2fd4 (MD5)A análise dos modos de atuação dos mecanismos atmosféricos é uma das bases da ciência climatológica, pois, através dessas, os pesquisadores estão aptos a fazer as diagnoses regionais, as prognoses climáticas, avaliar o possível impacto de variações climáticas e desenvolver projetos para mitigá-los. Seguindo essa lógica, foi elaborada a análise de adversidade climática do oeste paulista e do norte do Paraná. Para a efetuação dessa tarefa, foi utilizada a técnica de análise rítmica de Monteiro, sendo pesquisados os anos de 1997, 1998 e 2001 nas localidades de Presidente Prudente, Maringá e Londrina. Além da pesquisa dos dados diários desses três anos, em que foram criados 108 gráficos de análise rítmica e 108 gráficos de eventos climáticos, foram analisados 27 anos de dados mensais e anuais (1976- 2003) que possibilitaram a elaboração de 54 figuras, 67 tabelas, 102 gráficos e 9 organogramas, em que foram analisadas as características atmosféricas regionais, observando possíveis tendências de alterações climáticas futuras. Foram constatados, ao longo da análise, que a área de estudo está passando por um processo de aquecimento de até 1ºC, além de um processo de fortalecimento sazonal, com as estações mais secas e chuvosas tornando-se mais bem definidas, o que pode causar, futuramente, uma maior quantidade de eventos extremos e adversidades climáticas, que, por sua vez, podem afetar as cidades e a produção agrícola.
Analyzing how the atmospheric mechanisms act is a great base of the climate science because it allows the researches to know about the regional weather aspects, to discuss the possible impact of climatic variations and to develop projects in order to protect the region against these possible variations in the soon future. Following this idea, we elaborated an analysis about hazards in the Western Sao Paolo State and the North Parana State in Brazil. We based on the Monteiro rhythm analysis method to study the cities Presidente Prudente, Maringa and Londrina in the years 1997, 1998 and 2001. Through the search of diary weather statistics we created 108 rhythm analysis graphics and 108 climatic event graphics. Besides them, we studied 27 years of mensal and annual statistics (1976 - 2003) which allowed the creation of 54 figures, 67 tables, 102 graphics and 9 examples. Through these we analyzed regional climatic aspects, searching for future tendencies of climate variations. It was verified by the analysis a warming of one Celsius degree at the studied areas and also a process of sazonalization which showed more clearly the division of wet and dry seasons. We see that it could result in the future more cases of hazards that could affect the cities and the agricultural production. The thesis revels that the climatic rhythms study, the interpretation of regional climatic variation and the study of the necessary actions to protect the areas against hazards are complex questions which involve great series of variables that, sometimes, the statistical techniques are not able to solve, despite its powerful and recognition in science. Because of that, it is extremely important the careful interpretation of climatic aspects by rhythm paradigm, mainly linking it with statistical techniques as well.
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Baxter, C. E. "Low back pain and time of day : A study of their effects on psychophysical performance." Thesis, University of Liverpool, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234818.
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Berezuk, André Geraldo. "Análise das adversidades climáticas no oeste paulista e norte do Paraná /." Presidente Prudente : [s.n.], 2007. http://hdl.handle.net/11449/102967.
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Orientador: João Lima Sant'Anna NetoBanca: Margarete Cristiane de Costa Trindade Amorim
Banca: José Tadeu Garcia Tommaselli
Banca: Inês Moresco Danni-Oliveira
Banca: Emerson Galvani
A análise dos modos de atuação dos mecanismos atmosféricos é uma das bases da ciência climatológica, pois, através dessas, os pesquisadores estão aptos a fazer as diagnoses regionais, as prognoses climáticas, avaliar o possível impacto de variações climáticas e desenvolver projetos para mitigá-los. Seguindo essa lógica, foi elaborada a análise de adversidade climática do oeste paulista e do norte do Paraná. Para a efetuação dessa tarefa, foi utilizada a técnica de análise rítmica de Monteiro, sendo pesquisados os anos de 1997, 1998 e 2001 nas localidades de Presidente Prudente, Maringá e Londrina. Além da pesquisa dos dados diários desses três anos, em que foram criados 108 gráficos de análise rítmica e 108 gráficos de eventos climáticos, foram analisados 27 anos de dados mensais e anuais (1976- 2003) que possibilitaram a elaboração de 54 figuras, 67 tabelas, 102 gráficos e 9 organogramas, em que foram analisadas as características atmosféricas regionais, observando possíveis tendências de alterações climáticas futuras. Foram constatados, ao longo da análise, que a área de estudo está passando por um processo de aquecimento de até 1ºC, além de um processo de fortalecimento sazonal, com as estações mais secas e chuvosas tornando-se mais bem definidas, o que pode causar, futuramente, uma maior quantidade de eventos extremos e adversidades climáticas, que, por sua vez, podem afetar as cidades e a produção agrícola.
Analyzing how the atmospheric mechanisms act is a great base of the climate science because it allows the researches to know about the regional weather aspects, to discuss the possible impact of climatic variations and to develop projects in order to protect the region against these possible variations in the soon future. Following this idea, we elaborated an analysis about hazards in the Western Sao Paolo State and the North Parana State in Brazil. We based on the Monteiro rhythm analysis method to study the cities Presidente Prudente, Maringa and Londrina in the years 1997, 1998 and 2001. Through the search of diary weather statistics we created 108 rhythm analysis graphics and 108 climatic event graphics. Besides them, we studied 27 years of mensal and annual statistics (1976 - 2003) which allowed the creation of 54 figures, 67 tables, 102 graphics and 9 examples. Through these we analyzed regional climatic aspects, searching for future tendencies of climate variations. It was verified by the analysis a warming of one Celsius degree at the studied areas and also a process of sazonalization which showed more clearly the division of wet and dry seasons. We see that it could result in the future more cases of hazards that could affect the cities and the agricultural production. The thesis revels that the climatic rhythms study, the interpretation of regional climatic variation and the study of the necessary actions to protect the areas against hazards are complex questions which involve great series of variables that, sometimes, the statistical techniques are not able to solve, despite its powerful and recognition in science. Because of that, it is extremely important the careful interpretation of climatic aspects by rhythm paradigm, mainly linking it with statistical techniques as well.
Doutor
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Herrlein, Julio Cesar da Silva. "Das alturas ao ritmo : teoria dos conjuntos rítmicos como ferramenta composicional." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2018. http://hdl.handle.net/10183/179457.
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Esta tese de doutorado divide-se em duas partes: a primeira trata de uma Teoria dos Conjuntos Rítmicos, e a segunda traz o Portfolio de Composições desenvolvidas no período do doutorado. A Teoria dos Conjuntos Ritmicos apresenta um sistema de organização rítmica paralelo ao sistema de organização de alturas, tendo como ponto de partida a Teoria dos Conjuntos Musicais (TCM), tal como organizada por FORTE (1973), além de uma adaptação do time-point-system (BABBITT, 1962). A partir da sistematização da TCM, e também de noções da Teoria dos Conjuntos Diatônicos (TCD), essa abordagem sintética permite estabelecer uma conexão entre aspectos básicos da harmonia e da cifragem de acordes com a organização rítmica. A um só tempo, em um catálogo completo, são relacionadas as famílias de conjuntos de alturas e cifras cordais, com suas respectivas contrapartes rítmicas. A motivação musical para esta investigação acerca dos ritmos surgiu pelo interesse nos ritmos dançantes e repetitivos, denominados timelines (TOUSSAINT, 2013), comumente utilizados na chamada música popular As timelines dançantes refletem propriedades similares às dos conjuntos diatônicos e, por essa razão, esta tese apresenta algumas propriedades dos conjuntos diatônicos de alturas, traçando um paralelo com suas contrapartes rítmicas. Essas relações também aparecem no portfolio de composições, caracterizando alguns procedimentos utilizados. O portfolio de composições, que inclui uma composição para orquestra sinfônica, é tematizado a partir da dualidade transparência/opacidade, abordando algumas diferenças essenciais, do ponto de vista da audibilidade, entre os resultados oriundos de técnicas variadas de composição. Este estudo sobre Teoria dos Conjuntos Rítmicos ajudará na abordagem analítica da minha produção composicional na música popular, trazendo uma maneira sistemática de entender e extrapolar alguns aspectos já utilizados na minha prática como compositor e improvisador.This doctoral dissertation is divided into two parts: the first deals a rhythmic set theory, and the second contains the portfolio of compositions developed during this period of studies. This dissertation presents a system of rhythmic organization parallel to the musical set theory pitch class organization FORTE (1973), as well as an adaptation of the time-point-system (BABBITT, 1962). From the standpoint of the traditional set theory, and also from the diatonic set theory, this unified approach allows to estabilish a connecting tissue of basic aspects: from the harmony and chords symbols to the rhythmic organization. At one time, in a complete catalog, the families of pitch class sets and chord symbols are related to their respective rhythmic counterparts. The musical motivation for this research came from my interest in the swinging and groovy repetitive rhythms called timelines (TOUSSAINT, 2013), commonly used in popular music. These dancing timelines have properties similar to those of the diatonic sets, and for this reason, this dissertation presents some properties of the diatonic pitch class sets, drawing a parallel with their rhythmic counterparts. These relationships also appear in the portfolio of compositions, characterizing some procedures used. The portfolio of compositions, which includes a composition for symphony orchestra, is presented form the standpoint of a duality between transparency and opacity. This duality address the essential differences in the audibility of the results from various composition techniques. This study of Rhythmic Set Theory will serve as an analytical approach of my compositional output in popular music, with a systematic way to understant and to extrapolate some aspects already used in my practice as composer and improviser.
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Bisetto, Shayne Pedrozo. "Avaliação das atividades locomotora e nociceptiva diárias e sazonais de lagartos mantidos em condições ambientais controladas." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/74/74135/tde-14032017-104420/.
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O uso de répteis como modelos experimentais é limitado, principalmente devido às particularidades fisiológicas da classe, como as oscilações diárias e sazonais em seu comportamento. O objetivo deste estudo foi avaliar a atividade locomotora e nociceptiva de teiús (Salvator merianae) e iguanas-verdes (Iguana iguana) submetidos a testes comportamentais, ao longo do dia e do ano. Foram utilizados seis exemplares de cada espécie, mantidos em sala com temperatura ambiental (24 a 30°C) e fotoperíodo (12h:12h) controlados. Esses foram avaliados ao longo do dia (0:00h, 6:00h, 12:00h, 18:00h) e ao longo do ano (análise mensal). A análise locomotora foi realizada através do teste de campo aberto (teiús e iguanas), no qual o animal foi colocado no centro de uma arena circular por 15 minutos, e recebeu um ponto por cada ultrapassagem pelas subdivisões da mesma; e pelo teste de natação forçada (iguanas), no qual o tempo de atividade foi mensurado em piscina sem saída por 2 minutos. A resposta nociceptiva foi avaliada por meio de mensuração do período de latência do membro em resposta a estímulo nocivo térmico (25 segundos; 245 ± 7 mW/cm2) na superfície plantar do membro do animal. Não foram detectadas oscilações ao longo do ano no teste de campo aberto em nenhuma das espécies. Ao longo do dia, oscilações foram detectadas de Fevereiro a Dezembro em teiús; e em Abril, Maio, Junho e Outubro em iguanas. O tempo de atividade das iguanas foi menor em Janeiro e às 0:00h. Maiores latências de retirada do membro foram observadas nos meses de Maio e Agosto e às 6:00h em ambas espécies. Conclue-se que teiús e iguanas-verdes em ambiente controlado apresentam oscilações significativas em comportamento observado em teste de campo aberto, teste de natação forçada (somente iguanas) e teste plantar, que aparentemente não seguem padrões anuais claros, sendo provavelmente influenciado por fatores múltiplos ainda não compreendidos para as espécies.The use of reptiles as experimental models is limited due to their physiological particularities, such as daily and annual fluctuations in behavior. The aim of this study was to evaluate locomotor and nociceptive activities of tegus (Salvator merianae) and green iguanas (Iguana iguana) throughout the day and the year, when undergoing behavioral tests. Six animals from each species, kept under controlled room temperature (24 to 30°C) and photoperiod (12h:12h), were used. They were evaluated throughout the day (0:00h, 6:00h, 12:00h and 18:00) and the year (monthly). Locomotor activity was measured by the open field test, in which the animal was placed in the center of a round arena for 15 minutes and the number of crossings through the subdivisions of the arena was counted, and by the forced swim test (iguanas), in which the activity period was timed after animals were placed in a pool with no scape for 2 minutes. Nociceptive activity was measured as the latency to limb withdrawal reflex in response to a noxious thermal stimulus (25 seconds, 245 ± 7 mW/cm2) in the plantar surface of the animal\'s limb. No differences were detected in locomotor activity in the open field test throughout the year in both species. Throughout the day, fluctuations were detected from February to December in tegus, and in April, May, June and October in iguanas. Activity period in iguanas were shorter in January and at 0:00h. Longer latencies to withdrawal reflex were detected in May and August and at 6:00h in both species. In conclusion, tegus and green iguanas kept in controlled environment have fluctuations in behavior presented in the open field test, the forced swim (only iguanas) test and the plantar test, which apparently do not follow a clear seasonal pattern and are probably influenced by multiple factors that are still unknown for both species.
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Oliveira, Daiane Evangelista de. "Participação dos sistemas atmosféricos na gênese e ritmo das chuvas na bacia do Rio Preto, MG/RJ - anos de 2006, 2007, 2008." Universidade Federal de Juiz de Fora (UFJF), 2016. https://repositorio.ufjf.br/jspui/handle/ufjf/3099.
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Dentre os enfoques que podem ser dados aos estudos climáticos destaca-se a análise rítmica, que por considerar a sequência diária com que os elementos climáticos se manifestam, assim como os sistemas atmosféricos e suas correlações com o ambiente, permite uma análise integrada do clima. Esta, vêm contribuindo para que a sociedade se torne menos vulnerável às intempéries climáticas, à medida que considera tanto a sucessão habitual dos tipos de tempo quanto os eventos extremos em suas análises diárias. Partindo-se da necessidade de se conhecer essa complexa relação entre clima - ambiente – sociedade, o presente estudo teve por objetivo fazer uma investigação acerca do ritmo climático, através da quantificação da participação dos sistemas atmosféricos e dos fatores geográficos na gênese e no ritmo das chuvas na bacia hidrográfica do Rio Preto, MG/RJ, para os anos de 2006, 2007 e 2008. A partir daí se tornou possível estabelecer correlações entre o fenômeno climático e o meio físico, identificando sua dinâmica e principais unidades espaciais e temporais, estabelecendo um modelo integrado e a criação de mapas e gráficos de ritmo que subsidiassem a compreensão do sequenciamento dos tipos de tempo. A escala temporal de analise é a diária e em anos padrão (MONTEIRO, 1971, 1991) e a metodologia de escolha desses foi com base em técnicas estatísticas (box plot, desvio padrão, Sturgers e quantil). Os mapeamentos foram realizados no software ArcGIS 10, inserindo informações obtidas junto ao Hidroweb (ANA) e imagens de satélite (LANDSAT e SRTM). A construção dos gráficos de ritmo foi feita a partir de dados meteorológicos coletados no site Hidroweb da ANA, de analise sinótica de cartas sinóticas da Marinha do Brasil e dos boletins Climanalise. Como resultados, constatouse que os três anos estudados apresentaram características distintas quanto a distribuição espacial e temporal das chuvas, havendo maior destaque na alternância do regime destas. Em termos de participação dos sistemas atmosféricos é a mTa a que atuou no maior número de dias para os três anos e em 2008 (ano úmido) a atuação da ZCAS foi mais que o dobro dos demais anos (19%). Sob a atuação desta última, em quase 100% dos dias constatou-se a presença de chuvas. Também em dias sob atuação das frentes frias constatou-se a presença de chuvas. Os eventos extremos não seguiram um padrão de distribuição espacial.
Among the approaches that can be given to climate studies stands out the rhythmic analysis, what is set as the daily sequence with which the climatic elements manifest themselves, as well as the atmospheric systems they relate with the environment, providing an analysis integrated the climate. This contributed to what the society be less vulnerable to climatic conditions, as it considers both the usual succession of weather types as extreme events in their daily analysis. Starting from the need to understand the complex relationship between climate - environment - society, this study aimed to make an investigation about the climate pace, by quantifying in the participation of atmospheric systems and geographical factors in the genesis and rhythm of rain in the river watershed Preto, MG / RJ, for the years 2006, 2007 and 2008. Thenceforth, it became possible to establish correlations between the climatic phenomenon and the physical environment, identifying your dynamics and main spatial and temporal units, to establishing an integrated model and the creating maps, rhythm graphics that subsidize the understanding of the sequencing of the types of time. The temporal scale of analysis is daily and in years "pattern" (MONTEIRO, 1971, 1991) and the methodology of choice of these was based on statistical techniques (box plot, standard deviation, Sturgers and quantile). The maps were made in the ArcGIS 10 software by entering information obtained from the Hidroweb (ANA) and satellite imagery (Landsat and SRTM). The construction of the rhythm graphics was made from collected meteorological data in Hidroweb (ANA) website, synoptic analysis of synoptic maps of the Navy of Brazil and Climanalise newsletters. As a result, it was found that the three years studied showed different characteristics as the spatial and temporal distribution of rainfall, with greater emphasis on the annual alternation of these arrangements. In terms of participation of atmospheric systems is the Atlantic Tropical mass that acted in the greater number of days and in 2008 (wet year) the performance of South Atlantic convergence zone was more than double the other years (19%). Under the action of the latter, nearly 100% of the days found for the presence of rain. Also in action on day of cold fronts is it found the presence of rain. Extreme events have not followed a pattern of spatial distribution.
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Nicola, Angela Cristina de [UNESP]. "Atuação das proteínas do relógio na senescência reprodutiva de ratas Wistar." Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/152720.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
O envelhecimento é considerado processo multidimensional no qual fatores ambientais podem proteger ou, inversamente, agravar seus sinais, de maneira não linear, nos processos fisiológicos e neurocomportamentais. Durante este processo, os ritmos circadianos são interrompidos ou fragmentados com dissociação consequente dos ritmos circadianos do indivíduo e disfunções relacionadas ao relógio circadiano contribuem para o envelhecimento e para patologias a ele relacionadas. O objetivo deste estudo foi averiguar possível alteração temporal do sistema CLOCK no eixo HPG e a relação com às alterações hormonais que caracterizam a periestropausa. Foram utilizadas fêmeas adultas com ciclo estral regular (CD) na fase do diestro e fêmeas senis com ciclo estral irregular e persistência da fase do diestro (IDP). Para análises de expressão gênica dos clock genes Per2, Rev-erbα e Bmal1 no eixo HPG, foram utilizados punchs das regiões do NSQ, onde também foi analisado RNAm de AVP, APO e HMB destes animais, além da adenohipófise e ovários dos quais se extraiu o RNA para confecção do cDNA e realização de qPCR. A determinação da atividade neuronal vasopressinérgica no NSQ foi realizada por imunoistoquíca com dupla marcação para cFos e AVP em tecido previamente fixado com paraformaldeído. A concentração plasmática de gonadotrofinas foi determinada por radioimunoensaio. De modo geral, os animais IDP revelaram alterações no perfil de expressão gênica durante o fotoperíodo, com redução de amplitude, deslocamento/desalinhamento de fase e ausência de antifase. O NSQ de animais IDP apresentou menor expressão de Rev-erbα e maior expressão de RNAm para AVP em relação ao grupo CD. A quantificação relativa de Bmal1 foi semelhante em ambos os grupos e não houve diferenças entre grupos na expressão de Per2. Na APO, animais IDP apresentaram maior expressão de Per2 e menor quantidade de RNAm para Rev-erbα. No HMB observou-se menor expressão para Per2 e Rev-erbα e maior expressão de Bmal1 nas fêmeas IDP. Per2 e Bmal1 na adenohipófise tiveram menor expressão que o gene Rev-erbα no grupo senil e o ovário destes animais revelou maior expressão para Per2 e Rev-erbα, em comparação com os animais CD. As concentrações plasmáticas de FSH foram maiores nas fêmeas com ciclo irregular (2,05 ± 0,44 ng/mL), principalmente durante a fase clara, assim como o LH (0,24 ± 0,07 ng/mL), cujos maiores valores foram encontrados durante a fase escura e com perfil semelhante ao RNAm de AVP. As imunomarcações revelaram alta atividade vasopressinérgica na porção dorsomedial do NSQ das fêmeas IDP. Juntos estes dados permitem concluir que há desarranjo na expressão temporal dos genes Per2, Rev-erbα, Bmal1 que compõem a maquinaria molecular do relógio circadiano, bem como de RNAm para AVP no NSQ, de fêmeas Wistar na periestropausa. Além disso, a maior atividade neuronal vasopressinérgica e a ausência de oscilação de Rev-erbα e Bmal1 no NSQ destes animais, comprometem a correta comunicação do relógio central do NSQ com o eixo HPG, inviabilizando a manutenção da fertilidade feminina e contribuindo para a senescência reprodutiva.
Aging is considered a multidimensional process in which environmental factors can protect or, conversely, aggravate its signals, non-linearly, in physiological and neurobehavioral processes. During this process, circadian rhythms are disrupted or fragmented with consequent dissociation of the individual's circadian rhythms and circadian clock-related dysfunctions contribute to aging and related pathologies. The objective of this study was to investigate possible temporal alteration of the CLOCK system in the HPG axis and the relation with the hormonal changes that characterize periestropause. Adult females with regular estrus cycle in the diestrous phase (RD) and old females with irregular estrous cycle and persistent diestrous phase (IPD). For analyzes of the gene expression of the genes Per2, Rev-erbα and Bmal1 in the HPG axis, punchs from the NSQ regions were used, where AVP, POA and MBH RNAm from these animals were also analyzed, as well as the adenohypophysis and ovaries from which they were extracted the RNA for cDNA production and qPCR performance. The determination of the vasopressinergic neuronal activity in the NSQ was performed by immunohistochemical with double labeling for cFos/AVP in tissue previously fixed with paraformaldehyde. The plasma concentration of gonadotrophins was determined by radioimmunoassay. In general, the IPD animals show alterations in the gene expression profile during the period analyzed, with amplitude reduction, phase shift / misalignment and absence of antiphase. The NSQ of IPD animals presented lower expression of Rev-erbα and higher RNAm expression for AVP than RD group. The relative quantification of Bmal1 was similar in both groups and there were no differences between groups in the expression of Per2. In PAO, IPD animals showed higher expression of Per2 and less amount of RNAm for Rev-erbα. MBH showed lower expression for Per2 and Rev-erbα and higher Bmal1 expression in IPD females. Per2 and Bmal1 in the adenohypophysis had lower expression than the Rev-erbα gene in the old group and the ovary of these animals showed higher expression for Per2 and Rev-erbα, in related to to the RD animals. Plasma concentrations of FSH were higher in females with irregular cycle (2.05 ± 0.44 ng / mL), mainly during the light phase, as well as LH (0.24 ± 0.07 ng / mL) whose values were found during the dark phase and with a profile similar to AVP RNAm. Immunolabeling demonstrated high vasopressinergic activity in the dorsomedial portion of the NSQ of the IPD females. Together these data allow us to conclude that there is a breakdown in the temporal expression of the Per2, Rev-erbα, Bmal1 genes that make up the molecular machinery of the circadian clock, as well as RNAm for AVP in NSQ of Wistar females in peri-masterpause. In addition, the increased vasopressinergic neuronal activity and the absence of Rev-erbα and Bmal1 oscillation in the NSQ of these animals compromise the correct communication of the central clock of the NSQ with the HPG axis, making it impossible to maintain female fertility and contributing to reproductive senescence.
Books on the topic "Rhythm of the day"
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Gagne, Tammy. Day by day with Beyoncé. Hockessin, Del: Mitchell Lane Publishers, 2010.
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Day by day with Beyoncé. Hockessin, Del: Mitchell Lane Publishers, 2010.
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Gagne, Tammy. Day by day with Beyoncé. Hockessin, Del: Mitchell Lane Publishers, 2010.
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Rhythm of the reef: A day in the life of the coral reef. Stillwater, MN, USA: Voyageur Press, 1995.
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Beard, Daniel Carter. The fair weather and rainy day handy book. Mineola, N.Y: Dover Publications, 2009.
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Ganeri, Anita. Day and night. Chicago, Ill: Heinemann Library, 2005.
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1961-, Ganeri Anita, ed. Day and night. Oxford: Heinemann Library, 2004.
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Lak, Mehran. Investigation of cortisol circadian rhythm between night shift and day shift workers at Norwegian Post logistic center. London: University of Surrey Roehampton, 2001.
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Ingless, Steve. The day before yesterday: Rock, rhythm and jazz in the Bishop's Stortford area from 1957 to 1969. Bishop's Stortford: Scila, 1999.
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Day by day these things we pray: Uncovering ancient rhythms of prayer. Waterloo, Ont: Herald Press, 2010.
Find full textBook chapters on the topic "Rhythm of the day"
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Worth, Katharine. "Rhythm, Language and Style." In Waiting for Godot and Happy Days, 36–47. London: Macmillan Education UK, 1990. http://dx.doi.org/10.1007/978-1-349-08142-4_11.
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Worth, Katharine. "Rhythm, Language and Style." In Waiting for Godot and Happy Days, 14–18. London: Macmillan Education UK, 1990. http://dx.doi.org/10.1007/978-1-349-08142-4_6.
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McCandless, Greg, and Daniel McIntyre. "Manipulating Rhythm in the DAW Environment." In The Craft of Contemporary Commercial Music, 132–49. New York ; London : Routledge, 2017.: Routledge, 2017. http://dx.doi.org/10.4324/9781315680330-7.
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Passaglia, Christopher L., and Erik D. Herzog. "Circadian Modulation of the Limulus Eye for Day and Night Vision." In The Retina and Circadian Rhythms, 195–212. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-9613-7_10.
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Kavaliers, Martin, and Klaus-Peter Ossenkopp. "Magnetic Fields, Opioid Systems, and Day-Night Rhythms of Behavior." In Electromagnetic Fields and Circadian Rhythmicity, 95–117. Boston, MA: Birkhäuser Boston, 1992. http://dx.doi.org/10.1007/978-1-4684-6799-4_7.
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Cusenza, M., A. Accardo, and G. D’Addio. "Day-Time and Night-Time HRV Ultradian Rhythms in Normal and Pathological Subjects." In IFMBE Proceedings, 450–53. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-23508-5_117.
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Glăveanu, Vlad Petre. "Rhythm." In Creativity — A New Vocabulary, 129–36. London: Palgrave Macmillan UK, 2016. http://dx.doi.org/10.1057/9781137511805_16.
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Block, Bruce. "Rhythm." In The Visual Story, 223–43. Third edition. | London ; New York : Routledge, 2020.: Routledge, 2020. http://dx.doi.org/10.4324/9781315794839-8.
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Bertinetto, Alessandro. "Rhythm." In Lecture Notes in Morphogenesis, 455–57. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-51324-5_105.
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Bader, Rolf. "Rhythm." In Nonlinearities and Synchronization in Musical Acoustics and Music Psychology, 381–402. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-36098-5_12.
Full textConference papers on the topic "Rhythm of the day"
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Peternel, P., H. Možina, S. Pušnar, D. Keber, M. Stegnar, and N. Vene. "DIURNAL FTRRINOLYTIC RHYTHM IN PATIENTS WITH FIXED HEART RATE." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1643116.
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It has been established that fibrinolytic activity fluctuates during the day. Diurnal rhythm is possibly related to hemodynamic changes caused by daily activities. This presumption was tested in 10 patients with pacemaker and therefore fixed heart rate and limited changes in heart minute volume. Ten age and sex matched volunteers with normal heart rate served as controls. Venous blood was sampled at 8 a.m., noon, 4 p.m., 8 p.m., midnight and 4 a.m. Fibrinolytic activity was measured by three methods: spectrophotometric assay for tissue plasminogen activator (t-PA) activity, with euglobulin clot lysis time (ECLT) and on fibrin plates (FP). In patients with fixed heart rate no significant diurnal fluctuation in fibrinolytic activity was observed. In subjects with normal heart rate, diurnal rhythm was confirmed by all three methods. The highest fluctuation in activity was observed by t-PA assay with peak activity at noon (80 fold increase compared to midnight value). Also FP showed the highest activity at noon.With ECLT highest activity was detected at 4 p.m.Absence of diurnal rhythm in patients with fixed heart rate suggested importance of heart minute volume in regulation of blood fibrinolytic activity.
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Shivaram, Suganti, Anjani Muthyala, Zahara Z. Meghji, Susan Karki, and Shivaram Poigai Arunachalam. "Multiscale Entropy Technique Discriminates Single Lead ECG’s With Normal Sinus Rhythm and Sleep Apnea." In 2018 Design of Medical Devices Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/dmd2018-6948.
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Sleep apnea is characterized by abnormal interruptions in breathing during sleep due to partial or complete airway obstructions affecting middle-aged men and women on an estimated ∼4% of the population [1]. While the disorder is clinically manageable to relieve patients, the challenge occurs with diagnosis, with many patients going undiagnosed leading to further complications such as ischemic heart diseases, stroke etc. Sleep apnea also significantly affects the quality of day to day life causing sleepiness and fatigue. Polysomnography (PSG) technique is currently a used for detecting sleep apnea which is a comprehensive sleep test to diagnose sleep disorders by recording brain waves, the oxygen level in the blood, heart rate, breathing, eye and leg movements during the study. However, PSG test is very expensive, requires patients to stay overnight and is known to cause inconvenience to the patients.
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"Seven-day Analysis of Atrial Fibrillation and Circadian Rhythms." In International Conference on Bio-inspired Systems and Signal Processing. SciTePress - Science and and Technology Publications, 2013. http://dx.doi.org/10.5220/0004191400200024.
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Sun, Ruiqi, and Yi Shi. "Towards more convenient liveale city: research on the suburban dweller space using behaviour through spatiotemporal big data." In Post-Oil City Planning for Urban Green Deals Virtual Congress. ISOCARP, 2020. http://dx.doi.org/10.47472/yznx6176.
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Under the background of the rapid urbanization, suburbs have become the forefront of urban living space. Compared with the dwellers in the city center, the daily behavior characteristics of suburban dwellers are more varied due to the commuting distance and employment opportunities. Thus, if the city governor only based on the socio-economic or population density index to allocate the public resources, it might result waste. In here, we attempt to discuss the approach to reduce this kind of waste through dynamic behavior perspectives. Based on the above, Shenyang (the provincial capital city which located in the Northeast of China) was selected as a sample. The research collected LBS (Location Based Service) big data of 24 hours for seven consecutive days. Based on ST-DBSCAN clustering algorithm, the movement trajectories and stop points of 818 suburban dwellers in southern suburbs were recognized. Then, the activity type of each stop point was identified with time-space threshold method, including working behavior, residential behavior, non-work behavior outside home. Afterwards, based on the time rhythm characteristics of working and residential behaviors，the dwellers were divided in four types of daily activity patterns: Normal-time-rhythm group, Early-time-restricted- rhythm group Late-time–restricted-rhythm group, Dual-time-restricted-rhythm group. Based on the classification, the spatio-temporal distribution of the daily space of the residents during the weekdays and weekends are measured, the methods of geo-visualization and analysis of variance are applied to compare the differences in the daily activity space of different groups. The result indicated that the time constraints indeed affect the spatio-temporal distribution of non-working behaviors outside home in different ways, which further affects the use of city and community functional space. The finding focus on the different demands of groups of different lifestyles, providing a certain reference for the facilities time management and optimization of public facilities configuration policy.
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Morrison, J. EJ, A. B. Latif, C. Mason, P. Bramley, and T. R. Criag. "THE PROFILE OF IN VIVO PLATELET ACTIVATION IN NOCTURNAL ASTHMA." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1643495.
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The precise pathophysiology of nocturnal asthma still remains to be elucidated. Activated platelets have the ability to release potent broncho- and vaso-constrictors and therefore, have been implicated in asthma. However, there is no information on the status of in vivo platelet activation in patients with nocturnal asthmaIn a randomised controlled study five healthy volunteers and five asthmatics were investigated during a period of 24h after acclimatisation for one day. Both peak flow rate (PFR) and blood samples were obtained at 4 hourly intervals. Plasma levels of platelet factor 4 (PF4) and beta- thromboglobulin(BTG) were measured by radioimmunoassay and adrenaline (A), noradrenaline (NA) and dopamine (DOP) by radioenzymatic analysis.PFR (1/min) for the 24h period was significantly lower in asthmatics (401±15SEM, P<0.001) than in controls (598+4SEM) with an apparent circadian rhythm peak (442±73, P<0.05 Wilcoxon's test) at 4.00pm only in asthmatics. Although there was no significant differences in either PF4 and BTG (ng/ml) or A, NA and DOP (nmol/1) between asthmatics and controls an apparent circadian rhythm in all of these parameters was demonstrated in both groups. Peak values (mean+SEM) for PF4 (8.9±1.5) and BTG (44.4±3.8) occurred at 8.00am whereas the highest values for the catecholamines (A: 0.36±0.08, NA: 1.75±0.23, DOP: 0.78±0.16) were observed at 4.00pm indicating a lag of 8h between the peaks for catecholamines and the platelet specific proteinsThese initial data demonstrate a clear difference in PFR between asthmatics and controls which is apparently not associated with changes in either PF4 or BTG but which may concur with circadian changes in plasma levels of catecholamines at least in asthmatic patients. Thus, in vivo platelet activation is probably not a contributing factor in nocturnal asthma. Finally, the phase lag between peak plasma levels of platelet proteins and catecholamines requires further investigation
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Seiça, Mariana, Pedro Martins, Licínio Roque, and F. Amílcar Cardoso. "A Sonification Experience to Portray the Sounds of Portuguese Consumption Habits." In ICAD 2019: The 25th International Conference on Auditory Display. Newcastle upon Tyne, United Kingdom: Department of Computer and Information Sciences, Northumbria University, 2019. http://dx.doi.org/10.21785/icad2019.050.
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The stimuli for consumption is present in everyday life, where major retail companies play a role in providing a large range of products every single day. Using sonification techniques, we present a listening experiment of Portuguese consumption habits in the course of ten days, gathered from a Portuguese retail company. We focused on how to represent this time-series data as a musical piece that would engage the listener’s attention and promote an active listening attitude, exploring the influence of aesthetics in the perception of auditory displays. Through a phenomenological approach, ten participants were interviewed to gather perceptions evoked by the piece, and how the consumption variations were un-derstood. The tested composition revealed relevant associations about the data, with the consumption context indirectly present throughout the emerging themes: from the idea of everyday life, routine and consumption peaks to aesthetic aspects as the passage of time, frenzy and consumerism. Documentary, movie imagery and soundtrack were also perceived. Several musical aspects were also mentioned, as the constant, steady rhythm and the repetitive nature of the composition, and sensations such as pleasantness, sat-isfaction, annoyance, boredom and anxiety. These collected topics convey the incessant feeling and consumption needs which portray our present society, offering new paths for comprehending musical sound perception and consequent exploration.
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Rubtsova, Svetlana, Svetlana Rubtsova, Natalya Lyamina, Natalya Lyamina, Aleksey Lyamin, and Aleksey Lyamin. "ANALYSIS OF THE FUNCTIONING OF MARINE ECOSYSTEMS ON CHANGING THE PARAMETERS OF THE BIOLUMINESCENCE FIELD ON THE CRIMEAN BLACK SEA SHELF." In Managing risks to coastal regions and communities in a changing world. Academus Publishing, 2017. http://dx.doi.org/10.21610/conferencearticle_58b43168bfc21.
Full textAbstract:
The concept of a new approach to environmental assessment is offered in the system of integrated management of the resource and environmental safety of the coastal area of the Black Sea. The studies of the season and daily changeability in the bioluminescence field in the Sevastopol coastal waters has been conducted. For the first time considerable differences in the bioluminescence field seasonal changes in the surface and deep water layers and the reasons conditioning this phenomenon have been shown, using a method of multidimensional statistical analysis. The bioluminescence field vertical profile change in the Black sea coastal waters in the autumn period at night has been studied. It has been shown that according to the character of bioluminescence parameters dynamics a water column can be divided into layers: upper (0 – 35 m) and deep water (36 – 60 m). It has been revealed that life rhythms of the plankton community are the main reason for the bioluminescence field intensity variability. It has been revealed that 14-hour periodicity of the bioluminescence field is related to the changes in light and its variations with 2,5…4,5 hours are conditioned by planktonts endogenous daily rhythms. And here biotic factors effect mostly periodicity of the bioluminescence field intensity increase and fall down at the dark time of the day. Abiotic factors are of less importance in circadian rhythmic of the bioluminescence field in the neritic zone.
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Rubtsova, Svetlana, Svetlana Rubtsova, Natalya Lyamina, Natalya Lyamina, Aleksey Lyamin, and Aleksey Lyamin. "ANALYSIS OF THE FUNCTIONING OF MARINE ECOSYSTEMS ON CHANGING THE PARAMETERS OF THE BIOLUMINESCENCE FIELD ON THE CRIMEAN BLACK SEA SHELF." In Managing risks to coastal regions and communities in a changing world. Academus Publishing, 2017. http://dx.doi.org/10.31519/conferencearticle_5b1b9387ec5c97.58539127.
Full textAbstract:
The concept of a new approach to environmental assessment is offered in the system of integrated management of the resource and environmental safety of the coastal area of the Black Sea. The studies of the season and daily changeability in the bioluminescence field in the Sevastopol coastal waters has been conducted. For the first time considerable differences in the bioluminescence field seasonal changes in the surface and deep water layers and the reasons conditioning this phenomenon have been shown, using a method of multidimensional statistical analysis. The bioluminescence field vertical profile change in the Black sea coastal waters in the autumn period at night has been studied. It has been shown that according to the character of bioluminescence parameters dynamics a water column can be divided into layers: upper (0 – 35 m) and deep water (36 – 60 m). It has been revealed that life rhythms of the plankton community are the main reason for the bioluminescence field intensity variability. It has been revealed that 14-hour periodicity of the bioluminescence field is related to the changes in light and its variations with 2,5…4,5 hours are conditioned by planktonts endogenous daily rhythms. And here biotic factors effect mostly periodicity of the bioluminescence field intensity increase and fall down at the dark time of the day. Abiotic factors are of less importance in circadian rhythmic of the bioluminescence field in the neritic zone.
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Agrawal, Sandeep R., Valentin Pistol, Jun Pang, John Tran, David Tarjan, and Alvin R. Lebeck. "Rhythm." In ASPLOS '14: Architectural Support for Programming Languages and Operating Systems. New York, NY, USA: ACM, 2014. http://dx.doi.org/10.1145/2541940.2541956.
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Zhao, Laiping, Yanan Yang, Kaixuan Zhang, Xiaobo Zhou, Tie Qiu, Keqiu Li, and Yungang Bao. "Rhythm." In EuroSys '20: Fifteenth EuroSys Conference 2020. New York, NY, USA: ACM, 2020. http://dx.doi.org/10.1145/3342195.3387534.
Full textReports on the topic "Rhythm of the day"
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Blood, Mary. A comparison of circadian rhythms in day and night shift workers. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.5875.
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Vanderlinde, Pamela. Endless Rhythm Cape. Ames: Iowa State University, Digital Repository, 2013. http://dx.doi.org/10.31274/itaa_proceedings-180814-740.
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Voychishin, K. S., and Ya P. Dragan. Elimination Of Rhythm For Periodically Correlated Random Processes. Fort Belvoir, VA: Defense Technical Information Center, January 1993. http://dx.doi.org/10.21236/ada261061.
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Banducci, Naomi. Teaching hearing-impaired children language through the use of musical rhythm. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.1281.
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Hockman, Lee J. King Day. Fort Belvoir, VA: Defense Technical Information Center, March 1991. http://dx.doi.org/10.21236/ada239396.
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Terry, Laura, and James C. Miller. Circadian Rhythm Amplitude Effects on Nocturnal Brain Electrical Activity and Mental Performance. Fort Belvoir, VA: Defense Technical Information Center, May 2000. http://dx.doi.org/10.21236/ada381802.
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Drommond, Ray. Normative data for the Tennessee test of rhythm and intonation patterns (T-TRIP). Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.3288.
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Kline, K., A. Henke, and D. Moore. Science Day 2002. Office of Scientific and Technical Information (OSTI), September 2002. http://dx.doi.org/10.2172/15013372.
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Kline, K. Science Day Abstracts. Office of Scientific and Technical Information (OSTI), March 2001. http://dx.doi.org/10.2172/15006117.
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Wright, Jonathan. Event-day Options. Cambridge, MA: National Bureau of Economic Research, December 2020. http://dx.doi.org/10.3386/w28306.
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