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Davis, Logan, Kyle Flores, Erin Main, Mark Rognstad, and Margo Edwards. "Time-Lapse Photography of Munitions at Ordnance Reef." Marine Technology Society Journal 46, no. 3 (May 1, 2012): 21–25. http://dx.doi.org/10.4031/mtsj.46.3.1.
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AbstractOrdnance Reef, located just off the west coast of the island of O’ahu, Hawaii, is a shallow-water site (∼6-10 m water depth) where conventional munitions were disposed following World War II. Over the past decade, the site has been extensively mapped and sampled by the U.S. Army and National Oceanic and Atmospheric Administration (NOAA) using a wide variety of techniques. In the summer of 2011 at Ordnance Reef, we deployed an underwater time-lapse camera that was developed as part of a student science fair project to capture images of the interaction between the ocean environment and two munitions over an approximately 24-h period. During the deployment, the system photographed 10 species in the vicinity of munitions, three of which came into direct contact with munitions casings. Our project demonstrates that time-lapse photography could potentially be an inexpensive and effective approach for documenting the effects of munitions on the ocean environment and its residents.
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Machado e Moura, Carlos. "Photographic narratives of urban transformations." Sophia Journal 6, no. 1 (January 12, 2022): 10–11. http://dx.doi.org/10.24840/2183-8976_2021-0006_0001_3.
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Time, space, scale and movement are essential aspects of visual data production. Significant changes in cities’ flows can transpire in just a few minutes, hours or days, span several years or even decades. A diachronic study of an urban environment could therefore concentrate on the repetitive patterns of many activities and phenomena that occur during a day or focus on transformations over much more extended periods of time. There are several photographic methods that specifically focus on documenting this specific change — it is the case of “interval photography”, “time-lapse photography” and other forms of “repeat photography”.1 All these, and others, explicitly aim at sequentially researching social change, and physical and cultural expressions as they develop, over time in a particular physical or cultural space.(...)
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García-López, Santiago, Verónica Ruiz-Ortiz, and Juan José Muñoz-Pérez. "Time-lapse photography for monitoring reservoir leakages (Montejaque dam, Andalusia, southern Spain)." Hydrology Research 49, no. 1 (March 27, 2017): 281–90. http://dx.doi.org/10.2166/nh.2017.256.
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Abstract A methodology based on the use of time-lapse photographs is presented to evaluate the leakages over time of a reservoir (Montejaque dam, Málaga Province, Spain) that feeds a karstic aquifer. In particular, photographic control allows the evolution of water levels in the dam and the river that feeds it to be monitored. Through changes in water volume, which are calculated from the level differences, daily leakages are evaluated, and the relationship between leakages and the water level of the reservoir is established. The proposed method includes adjusting the hydric balance and the use of digital terrain model and climate data. The inputs (river flow and direct precipitation) and other outputs (direct evaporation) are also evaluated. Values between 4 m3/s and 0.35 m3/s are obtained for the reservoir infiltration, clearly superior to the values obtained at the time of the construction of the dam in the 1920s. Mobilisation of the filling of fractures and conduits in karstic massif and calcite dissolution are processes that can influence this behaviour. When the water level is very low, the obtained values are below the historical leakages due to deposition of clay sediments at the reservoir bottom.
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Williams, Stephen E., and Bill Scholl. "Using a trail camera for recording plant-insect interactions with Venus flytrap as an example." Carnivorous Plant Newsletter 50, no. 2 (June 1, 2021): 66–72. http://dx.doi.org/10.55360/cpn502.sw510.
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Trail cameras can be used for the study of the interaction between plants and insects if they have a close-up lens and the capability of doing time-lapse photographs or videos. Typical trail cameras are mounted vertically, often on unstable camera stands. We have used the Bushnell NatureView HD Cam Model# 119740 and RC Williams Co. TopView Quick-Mount camera-stand to study the behavior of insects interacting with Venus flytraps (Dionaea muscipula). The combination allows photographs and videos to be made of insects and plants from above, with the camera held in a position that allows the plants to be observed from the exact same position for months at a time. Every five minutes a photograph and a one-minute video are recorded. We have developed methods of searching through this data for important events that involve producing “slide shows” of the photographs overlain by a grid, that can be quickly scanned for events of interest. Video of these events near the time of the sequentially numbered photograph can then be viewed. The slides and videos can also be sampled at intervals for more gradual changes.
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Baroutsis, Aspa. "Sociomaterial assemblages, entanglements and text production: Mapping pedagogic practices using time-lapse photography." Journal of Early Childhood Literacy 20, no. 4 (July 2, 2018): 732–54. http://dx.doi.org/10.1177/1468798418784128.
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This paper maps a teacher’s pedagogic practices when teaching young children to produce texts using digital technologies during a literacy lesson for 7–8 year-old children. Pedagogies are broadly understood as what the teacher does in a classroom to facilitate learning in a twenty-first century classroom. The paper argues that the very notion of pedagogy places the teacher at the centre of learning practices, more so than other aspects of teaching such as the curriculum and assessment, which are heavily regulated by policy. Underpinned by understandings of sociomaterial assemblages, incorporating the material and the spatial, data were collected using time-lapse photography, classroom observations and field notes including classroom floor plans. The findings of a frame-by-frame analysis of the time-lapse photographs are reported through the three interconnected concepts of pedagogy, space and materials. The paper concludes by suggesting that an understanding of the material and spatial entanglements in a classroom through a mapping of pedagogies augments current knowledge, enabling a fresh understanding of teaching literacy and how young children learn to write as twenty-first century learners as children enact their journey of becoming-writer.
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Gilbert, Jeannie, and David Punter. "Release and dispersal of pollen from dwarf mistletoe on jack pine in Manitoba in relation to microclimate." Canadian Journal of Forest Research 20, no. 3 (March 1, 1990): 267–73. http://dx.doi.org/10.1139/x90-039.
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The release and dispersal of pollen of Arceuthobiumamericanum Nutt. ex Engelm. parasitizing Pinusbanksiana Lamb. were examined in relation to microclimate in southern Manitoba. Time-lapse photography revealed that once open, the long-lived staminate flowers remain open. The anthers, however, open in response to rising temperatures and falling relative humidities and close under the reverse conditions. Small Diptera (Sciaridae) appeared on the photographs on 25 occasions during the wet spring of 1986. Nectar was scarce on pistillate flowers, but accumulated on the central cushions of staminate flowers when relative humidities were high. In the dry spring of 1987, nectar was rarely seen on the staminate flowers and one small dipteran was photographed just once. Large beads of concentrated nectar (50–65% sugar), however, formed on the stigmas in 1987. Large Diptera were rarely seen in 1986, but were numerous in 1987. Visits to staminate flowers were more frequent than to pistillate (2.7:1.0), but individual insects spent more time on pistillate flowers than staminate (9.6:1.0 s). Pollen grains, trapped on a continuously recording volumetric spore trap, increased in number during warm periods and fluctuated when weather alternated between rainy and dry. Pollination is effected by unspecialized insect visitors and wind. Like other diclinous species, A. americanum represents a compromise between entomophily and anemophily.
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Lavery, David. "‘No More Unexplored Countries’: The Early Promise and Disappointing Career of Time-Lapse Photography." Film Studies 9, no. 1 (2006): 1–8. http://dx.doi.org/10.7227/fs.9.3.
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Time-lapse photography—the extremely accelerated recording and projection of an event taking place over an extended duration of time—is almost as old as the movies themselves. (The first known use of time-lapse dates from 1898.) In the early decades of the twentieth century, cineastes, not to mention scientists, artists, and poets, waxed eloquently on the promise of time-lapse photography as a means for revealing “things we cannot see,” and expanding human perception. This essay examines time-lapses tremendous initial imaginative appeal for such figures as Ernst Mach, Germaine Dulac, Jean Epstein, Rudolf Arnheim, Laszlo Moholy-Nagy, and Collette, and speculates about the possible reasons for its diminution over the course of the century.
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Dufour-Beauséjour, Sophie, Anna Wendleder, Yves Gauthier, Monique Bernier, Jimmy Poulin, Véronique Gilbert, Juupi Tuniq, Amélie Rouleau, and Achim Roth. "Combining TerraSAR-X and time-lapse photography for seasonal sea ice monitoring: the case of Deception Bay, Nunavik." Cryosphere 14, no. 5 (May 26, 2020): 1595–609. http://dx.doi.org/10.5194/tc-14-1595-2020.
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Abstract. This article presents a case study for the combined use of TerraSAR-X and time-lapse photography time series in order to monitor seasonal sea ice processes in Nunavik's Deception Bay. This area is at the confluence of land use by local Inuit, ice-breaking transport by the mining industry, and climate change. Indeed, Inuit have reported greater interannual variability in seasonal sea ice conditions, including later freeze-up and earlier breakup. Time series covering 2015 to 2018 were acquired for each data source: TerraSAR-X images were acquired every 11 d, and photographs were acquired hourly during the day. We used the combination of the two time series to document spatiotemporal aspects of freeze-up and breakup processes. We also report new X-band backscattering values over newly formed sea ice types. The TerraSAR-X time series further show potential for melt and pond onset.
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Calvert, R. E., and O. Bar-Or. "150 A TIME-LAPSE PHOTOGRAPHIC EVALUATION OF THE SYMMETRY OF FOREARM SWEATING PATTERN." Medicine & Science in Sports & Exercise 25, Supplement (May 1993): S28. http://dx.doi.org/10.1249/00005768-199305001-00152.
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Woolard*, Derek D., Judy Fugiel, F. Paul Silverman, and Peter D. Petracek. "Use of Time-lapse Video to Demonstrate Plant Growth Regulator (PGR) Responses." HortScience 39, no. 4 (July 2004): 875A—875. http://dx.doi.org/10.21273/hortsci.39.4.875a.
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Tables, graphs, and photographs can effectively convey detailed results of a PGR experiment. However, we have observed that demonstrating PGR treatment effects by time-lapse video creates a strong impact on both scientists and non-technical audiences. Time-lapse video also provides a method for obtaining a continuous visual record that can be used to establish the precise chronology of a slow process. Recent advances in notebook computers, inexpensive digital cameras (e.g. 3Com HomeConnect™), and time-lapse software (e.g. Picture WorkLive™) allow scientists and teachers to inexpensively prepare time-lapse videos. Important considerations for the production of quality time-lapse videos include: 1. treatment effects should be substantial, consistent, and visible, 2. digital camera images should be clear, 3. lighting should be constant and provide adequate brightness and proper color, 4. camera movement such as those due to vibrations should be minimal, 5. camera placement should simplify composition. Time-lapse videos of PGR treatment effects will be shown, and methods of production will be discussed.
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Giordan, Daniele, Niccolò Dematteis, Paolo Allasia, and Elena Motta. "Classification and kinematics of the Planpincieux Glacier break-offs using photographic time-lapse analysis." Journal of Glaciology 66, no. 256 (January 17, 2020): 188–202. http://dx.doi.org/10.1017/jog.2019.99.
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AbstractHerein, we present results obtained from time-lapse imagery acquired by a digital single-lens reflex camera during 2014–18 used to monitor the Planpincieux Glacier on the Italian side of the Grandes Jorasses (Mont Blanc massif). We processed the images using image cross-correlation to measure the surface kinematics of the most active lobe of the glacier that presents a high velocity and frequent ice detachments. During the monitoring, we observed two or three periods of sharp acceleration per year that culminated with large break-offs followed by analogous decelerations. Overall, we registered more than 350 failures with a volume >100 m3, of which, 14 events had volumes larger than 10 000 m3. The study identified a monotonic positive relationship between the velocity and failure volume that may be used to estimate the volume of the collapses before an event. We identified the thresholds of velocity and acceleration that characterise the activation of the speed-up periods. The study allowed the characterisation of three different instability processes that lead to the break-off of ice chunks from the glacier terminus: (i) disaggregation, (ii) slab fracture and (iii) water tunnelling failure which can be differentiated based on the rheology, the volume involved and the trigger process.
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Lindsay, Christopher James, Rafael Silk Lee, Mark D. Lindsay, Margo H. Edwards, Mark R. Rognstad, and Holly Chung Lindsay. "Submersible Hawaiian Aquatic Research Camera System: STEM Initiatives Fostering the Study of Hawaii's Marine Biota Using Underwater Time-Lapse Photography." Marine Technology Society Journal 49, no. 4 (July 1, 2015): 119–25. http://dx.doi.org/10.4031/mtsj.49.4.5.
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AbstractIn contrast to the traditional mentor-apprentice relationship inherent in most high school science research projects, a team of high school students designed and executed their own research study that focused on engineering a low-cost (<$1,000) camera and light apparatus to perform underwater time-lapse photography. With the advice of mentors from the University of Hawaii, the STEM community, and 'Iolani School, the team used their apparatus to study biota living underwater in caves near Makai Research Pier offshore of East Oahu, Hawaii. The photographic system consisted of a Raspberry Pi microcomputer and camera board synchronized with a homemade LED lighting system housed in aluminum or PVC piping with acrylic windows. Several deployments in shallow water (<5 m) yielded images of Hawaiian Whitetip Reef shark (Triaenodon obesus), Hawaiian Green Sea turtles (Chelonia mydas), and other marine animals in their natural reef habitat. The project demonstrates that, in less than a year, high school students can overcome the challenges of building an inexpensive, underwater time-lapse camera system to study the behavior of marine biota. This article describes the team's engineering project, scientific research, lessons learned, and outreach efforts in the hope that other educational, scientific, and governmental institutions will be encouraged to offer similar, enriching opportunities to nurture high school students to conduct STEM studies that advance ongoing, related research.
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Krohn, Drake, and Darcy M. Bullock. "Time-Lapse Photography of Runway Reconstruction for Education and Training." Transportation Research Record: Journal of the Transportation Research Board 2603, no. 1 (January 2017): 39–49. http://dx.doi.org/10.3141/2603-05.
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Airfield construction projects have unique construction challenges because of their close proximity to aircraft operations. During these projects, communication, safety areas, airspace protection zones, and foreign object damage are emphasized. Incursions and incidents are of significant concern to FAA, the airport operator, and the contractor. This paper discusses and illustrates how time-lapse photography can be used to develop training and educational material pertaining to the construction practices on airfields. This proposed idea is illustrated through case studies documenting runway reconstruction at two airports in Indiana. The paper is supplemented by several images and with links to YouTube videos to illustrate these concepts. This material is beneficial for training construction workers in airfield awareness, and it provides an overall understanding of the complexities of airside construction. Although this paper focuses on general aviation airports, the material can be of value to all sizes and types of airports. With some modifications and support, the proposed techniques could be applied to larger airports.
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Bongio, Marco, Ali Nadir Arslan, Cemal Melih Tanis, and Carlo De Michele. "Snow depth time series retrieval by time-lapse photography: Finnish and Italian case studies." Cryosphere 15, no. 1 (January 27, 2021): 369–87. http://dx.doi.org/10.5194/tc-15-369-2021.
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Abstract. The capability of time-lapse photography to retrieve snow depth time series was tested. Historically, snow depth has been measured manually by rulers, with a temporal resolution of once per day, and it is a time-consuming activity. In the last few decades, ultrasonic and/or optical sensors have been developed to obtain automatic and regular measurements with higher temporal resolution and accuracy. The Finnish Meteorological Institute Image Processing Toolbox (FMIPROT) has been used to retrieve the snow depth time series from camera images of a snow stake on the ground by implementing an algorithm based on the brightness difference and contour detection. Three case studies have been illustrated to highlight potentialities and pitfalls of time-lapse photography in retrieving the snow depth time series: Sodankylä peatland, a boreal forested site in Finland, and Gressoney-La-Trinité Dejola and Careser Dam, two alpine sites in Italy. This study presents new possibilities and advantages in the retrieval of snow depth in general and snow depth time series specifically, which can be summarized as follows: (1) high temporal resolution – hourly or sub-hourly time series, depending on the camera's scan rate; (2) high accuracy levels – comparable to the most common method (manual measurements); (3) reliability and visual identification of errors or misclassifications; (4) low-cost solution; and (5) remote sensing technique – can be easily extended in remote and dangerous areas. The proper geometrical configuration between camera and stake, highlighting the main characteristics which each single component must have, has been proposed. Root mean square errors (RMSEs) and Nash–Sutcliffe efficiencies (NSEs) were calculated for all three case studies comparing with estimates from both the FMIPROT and visual inspection of images directly. The NSE values were 0.917, 0.963 and 0.916, while RMSEs were 0.039, 0.052 and 0.108 m for Sodankylä, Gressoney and Careser, respectively. In terms of accuracy, the Sodankylä case study gave better results. The worst performances occurred at Careser Dam located at 2600 m a.s.l., where extreme weather conditions and a low temporal resolution of the camera occur, strongly affecting the clarity of the images.
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Lee, H., K. T. Bush, and R. G. Nagele. "Time-lapse photographic study of neural tube closure defects caused by xylocaine in the chick." Teratology 37, no. 3 (March 1988): 263–69. http://dx.doi.org/10.1002/tera.1420370312.
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Harrison, W. D., K. A. Echelmeyer, D. M. Cosgrove, and C. F. Raymond. "The determination of glacier speed by time-lapse photography under unfavorable conditions." Journal of Glaciology 38, no. 129 (1992): 257–65. http://dx.doi.org/10.1017/s002214300000366x.
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AbstractTwo practical problems in the use of time-lapse photography for the measurement of speed were encountered during the recent surge of West Fork Glacier in the central Alaska Range, Alaska, U.S.A. The first is severe rotational camera instability; we show how natural, unsurveyed features on the valley wall can be used to make the necessary corrections. The second problem is the computation of absolute speed when many different, unsurveyed glacier-surface features are used as targets. We give a method for connecting the data obtained from different targets, and for determining the scale using limited information obtained by surveying. Severe systematic errors can occur unless the angle between the axis of the lens and the direction of horizontal motion is determined.
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Harrison, W. D., K. A. Echelmeyer, D. M. Cosgrove, and C. F. Raymond. "The determination of glacier speed by time-lapse photography under unfavorable conditions." Journal of Glaciology 38, no. 129 (1992): 257–65. http://dx.doi.org/10.3189/s002214300000366x.
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AbstractTwo practical problems in the use of time-lapse photography for the measurement of speed were encountered during the recent surge of West Fork Glacier in the central Alaska Range, Alaska, U.S.A. The first is severe rotational camera instability; we show how natural, unsurveyed features on the valley wall can be used to make the necessary corrections. The second problem is the computation of absolute speed when many different, unsurveyed glacier-surface features are used as targets. We give a method for connecting the data obtained from different targets, and for determining the scale using limited information obtained by surveying. Severe systematic errors can occur unless the angle between the axis of the lens and the direction of horizontal motion is determined.
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Coleman, Timothy A., Kevin R. Knupp, and Daryl E. Herzmann. "An Undular Bore and Gravity Waves Illustrated by Dramatic Time-Lapse Photography." Journal of Atmospheric and Oceanic Technology 27, no. 8 (August 1, 2010): 1355–61. http://dx.doi.org/10.1175/2010jtecha1472.1.
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Abstract On 6 May 2007, an intense atmospheric undular bore moved over eastern Iowa. A “Webcam” in Tama, Iowa, captured dramatic images of the effects of the bore and associated gravity waves on cloud features, because its viewing angle was almost normal to the propagation direction of the waves. The time lapse of these images has become a well-known illustration of atmospheric gravity waves. The environment was favorable for bore formation, with a wave-reflecting unstable layer above a low-level stable layer. Surface pressure and wind data are correlated for the waves in the bore, and horizontal wind oscillations are also shown by Doppler radar data. Quantitative analysis of the time-lapse photography shows that the sky brightens in wave troughs because of subsidence and darkens in wave ridges because of ascent.
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Yau, C., M. A. Collins, and I. Everson. "Commensalism between a liparid fish (Careproctus sp.) and stone crabs (Lithodidae) photographed in situ using a baited camera." Journal of the Marine Biological Association of the United Kingdom 80, no. 2 (April 2000): 379–80. http://dx.doi.org/10.1017/s0025315499002052.
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The commensal relationship between a snailfish, tentatively identified as Careproctus sp. (Osteichthyes: Liparidae), and the lithodid crab Paralomis formosa (Crustacea: Lithodidae) was photographed in situ using a baited camera vehicle, deployed at depths of 625-1525 m around Shag Rocks and South Georgia in the Southern Ocean. The series of time-lapse photographs taken clearly showed that the small liparid fish `hitched rides' on the crabs, presumably attaching to the dorsal carapace and legs of the crabs by means of their ventral sucking disk. Liparid fish of 20-90 mm total length, corresponding to juveniles and adult sizes, were observed on the crabs and indicate that Careproctus sp. is closely associated with P. formosa for the whole of the life cycle of the fish. Such an association may provide the snailfish with protection from potential predators as well as a means of transport towards food-falls but at no apparent cost to the crabs.
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Otsubo, J., and H. Higuchi. "Time-lapse camera photographs reveal arrival and breeding timing of short-tailed albatrosses Phoebastria albatrus." Endangered Species Research 47 (January 13, 2022): 49–59. http://dx.doi.org/10.3354/esr01160.
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Monitoring the ecology of seabirds breeding on remote islands is often challenging. However, time-lapse cameras have enabled the surveillance of inaccessible sites. We examined arrival/departure movements and breeding timing of the endangered short-tailed albatross Phoebastria albatrus with time-lapse cameras on Torishima, a remote and uninhabited island in the northwestern Pacific, from November 2016 to June 2017. The photographic images revealed that the first arrival of the albatrosses on the island was on 7 October 2016, and the number of birds reached a peak of 506 on 5 November. The white pairs arrived and began incubating approximately 1 wk earlier than the white/brownish pairs. From the end of January, the number of birds repeatedly increased and decreased within a short period of time. The birds’ movement out of the breeding colony often occurred synchronously with a rapid decline in the mean daily air pressure. Adult birds began to leave the colony in April. The number of chicks reached up to 200 at the beginning of May, but they all left the colony before 1 June. The processing of the photographic images taken during the incubation and early guard periods revealed that hatching failed in approximately 10% of the pairs. The validity of information collected by time-lapse cameras was confirmed by comparing it with the results of previous field studies. This study will contribute to the collection of essential information for monitoring and conserving seabirds breeding on remote islands where successive or frequent fieldwork is difficult.
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Lachica, Edward. "Keeping Life in Focus New Systems Prevent Z-axis Drift in Time Lapse Studies." Microscopy Today 14, no. 4 (July 2006): 42–46. http://dx.doi.org/10.1017/s1551929500050276.
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Just two decades ago, life scientists studied biological structure, developmental anatomy and intracellular processes by describing individual snapshots of kinetic events. Today, with so much bioscience research focusing on dynamic processes that occur on the molecular, cellular and whole organ level, it is important to record events as they happen, over seconds, minutes or hours, in living cells. Photographs and camera lucida drawings of fixed, stained cells have given way to live cell imaging using fluorescent probes, warming trays to promote cell viability and cinemicrography as a method of recording events.
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Garvelmann, J., S. Pohl, and M. Weiler. "Applying a time-lapse camera network to observe snow processes in mountainous catchments." Hydrology and Earth System Sciences Discussions 9, no. 9 (September 20, 2012): 10687–717. http://dx.doi.org/10.5194/hessd-9-10687-2012.
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Abstract. A network of 45 spatially distributed time-lapse cameras was used to carry out a continuous observation of snow processes and snow cover properties throughout three mid-latitude medium elevation mountain catchments in hourly intervals. A simple technical modification was conducted to enable the deployment of the standard digital cameras in any location. Image analysis software was applied to extract information about snow depth, surface albedo, and canopy interception from the digital images. Furthermore, the distributed design of the camera network made it possible to identify the elevation of the snow rain interface for any precipitation event for the interpretation of winter flooding events resulting from snow melt. Study results prove that the application of digital time-lapse photography is an appropriate technique to observe the spatial distribution and temporal evolution of seasonal snow covers in a mountainous environment.
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Wien, H. C., and R. J. Sloan. "Time-lapse Video Photography: A Low-tech Way to Make Plants Dance." HortScience 31, no. 4 (August 1996): 568c—568. http://dx.doi.org/10.21273/hortsci.31.4.568c.
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The growth processes of most horticultural crops are too slow to be visually interesting to students. Time lapse photography has been used for years to speed up the action and make plants “come alive.” With the advent of video technology, time lapse techniques have become convenient, easy, and affordable. The system which we have found satisfactory consists of a time lapse video cassette recorder, linked by optical fiber cable to a closed circuit color video camera in a ventilated housing. Typically, the camera has been set up in a greenhouse compartment, monitoring growth processes of vegetable crops, and linked by cable to the VCR in an office 80 m away. Equipment costs with one camera are less than $3000. Two cameras can be set up to do comparative growth studies, with two images side-by-side, using a screen splitter. Costs of the latter system is about $4500. Growth processes such as cabbage head formation, curd growth in cauliflower, and weed-crop competition of mustard and peas have been the subjects so far. The technique lends itself to increasing the visual impact of teaching, and gaining a better understanding of plant growth processes in research.
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Forsythe, Perry John, and Samad M. E. Sepasgozar. "Measuring installation productivity in prefabricated timber construction." Engineering, Construction and Architectural Management 26, no. 4 (May 20, 2019): 578–98. http://dx.doi.org/10.1108/ecam-09-2017-0205.
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Purpose A problematic issue for new approaches to prefabricated timber construction is simply that there is insufficient productivity measurement data to assist estimation of resource usage, speed onsite and best practice. A lack of information potentially results in increased pricing behaviour which may slow the uptake of prefabricated construction. The purpose of this paper is to measure installation productivity onsite for prefabricated timber floor cassette panels and develop sufficient understanding of the process to suggest improved practices. Design/methodology/approach A time and motion approach, paired with time-lapse photography was used for detailed capture of prefabricated cassette flooring installation processes onsite. An emphasis was placed on work flow around crane cycles from three case study projects. Time and date stamping from 300 crane cycles was used to generate quantitative data and enable statistical analysis. Findings The authors show that crane cycle speed is correlated to productivity including gross and net crane time scenarios. The latter is refined further to differentiate uncontrolled outlying crane cycles from normally distributed data, representing a controlled work process. The results show that the installation productivity rates are between 69.38 and 123.49 m2/crane-hour, based on normally distributed crane cycle times. These rates were 10.8–26.1 per cent higher than the data set inclusive of outlier cycles. Large cassettes also proved to be more productive to place than small. Originality/value The contribution of this research is the focus on cranage as the lead resource and the key unit of measure driving installation productivity (in cassette flooring prefabricated construction), as distinct from past research that focuses on labour and craft-based studies. It provides a different perspective around mechanisation, for resourcing and planning of work flow. Crane cycles provide a relatively easy yet reliably repeatable means for predicting productivity. The time-lapse photographic analysis offers a high degree of detail, accuracy and objectivity not apparent in other productivity studies which serves to enable quantitative benchmarking with other projects.
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Danielson, Brad, and Martin Sharp. "Development and application of a time-lapse photograph analysis method to investigate the link between tidewater glacier flow variations and supraglacial lake drainage events." Journal of Glaciology 59, no. 214 (2013): 287–302. http://dx.doi.org/10.3189/2013jog12j108.
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AbstractMarine-terminating glaciers may experience seasonal and short-term flow variations, which can impact rates of ice flux through the glacier terminus. We explore the relationship between variability in the flow of a large tidewater glacier (Belcher Glacier, Nunavut, Canada), the seasonal cycle of surface meltwater production and the rapid drainage of supraglacial lakes. We demonstrate a novel method for analyzing time-lapse photography to quantify lake area change rates (a proxy for net filling and drainage rates) and develop a typology of lake drainage styles. GPS records of ice motion reveal four flow acceleration events which can be linked to lake drainage events discovered in the time-lapse photography. These events are superimposed on a longer pattern of velocity variation that is linked to seasonal variation in surface melting. At the terminus of the glacier, the ice displacement associated with the lake drainage events constitutes ∼10% of the seasonally accelerated displacement or 0.4% of the total annual ice displacement (336 m a−1). While the immediate ice response to these individual perturbations may be small, these drainage events may enhance overall seasonal acceleration by opening and/or sustaining meltwater conduits to the glacier bed.
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Xu, Yun Geng, and San Xing Cao. "Real-Time Video Acquisition and Frame Compression Processing Technology Based on FFmpeg." Applied Mechanics and Materials 631-632 (September 2014): 494–97. http://dx.doi.org/10.4028/www.scientific.net/amm.631-632.494.
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Currently, video has become the most popular form of media, traditional video field is facing simulated to digital transformation. Using the computer to process the video information has a broad application prospect in many areas. This paper proposes an approach of real-time video acquisition and frame compression processing technology by using the FFmpeg and PHP function to achieve the effect of time-lapse photography. Finally, through the Apache log test the system running status.
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Hong, S. W., Z. Y. Yan, M. S. Otterburn, and M. J. McCarthy. "Magnetic resonance imaging (MRI) of a cookie in comparison with time-lapse photographic analysis (TLPA) during baking process." Magnetic Resonance Imaging 14, no. 7-8 (January 1996): 923–27. http://dx.doi.org/10.1016/s0730-725x(96)00183-x.
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Garvelmann, J., S. Pohl, and M. Weiler. "From observation to the quantification of snow processes with a time-lapse camera network." Hydrology and Earth System Sciences 17, no. 4 (April 12, 2013): 1415–29. http://dx.doi.org/10.5194/hess-17-1415-2013.
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Abstract. A network of 45 spatially distributed time-lapse cameras was used to carry out a continuous observation of snow processes and snow cover properties throughout three mid-latitude medium elevation mountain catchments in hourly intervals during the winter seasons of 2010/2011 and 2011/2012. A simple technical modification was conducted to enable the deployment of the standard digital cameras in any location. Image analysis software was applied to extract information about snow depth, surface albedo and canopy interception from the digital images. Furthermore, the distributed design of the camera network made it possible to identify the elevation of the snow rain interface for any precipitation event which is very helpful for the interpretation of winter flooding events resulting from snow melt. Exemplary data for all these analyses is presented to show the potential fields of application of this innovative approach. Study results prove that the application of digital time-lapse photography is an appropriate technique to observe the spatial distribution and temporal evolution of seasonal snow covers in a mountainous environment.
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Simpson, Paul. "Apprehending everyday rhythms: rhythmanalysis, time-lapse photography, and the space-times of street performance." cultural geographies 19, no. 4 (June 21, 2012): 423–45. http://dx.doi.org/10.1177/1474474012443201.
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This paper develops means of apprehending the rhythms of everyday practices and performances. Emerging from the context of recent calls for more explicit engagements with issues surrounding research methods and methodologies in the doing of cultural geography, and in particular in the examination of the geographies of practices, the paper responds to critiques of recent discussions of urban and social rhythms that highlight limitations in the articulation of methods for actually apprehending everyday rhythms. As such, in conversation with Lefebvre’s portrait of the rhythmanalyst and other works interested in the significance of rhythm to social practices, the paper proposes time-lapse photography as a useful component of such a rhythm-analytical, and more generally practice-orientated, methodology. In doing so, the paper draws attention to this method’s ability to document and facilitate the reflection upon the complex durational unfolding of events and the situation of key occurrences within this polyrhythmia. This is illustrated in relation to the everyday rhythms of a specific urban space in Bath, UK and a street magician’s variously successful attempt to intervene into the everyday life of Bath.
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Kreutzberg, Anette, and Emanuele Naboni. "360° VR for Qualifying Daylight Design." SHS Web of Conferences 64 (2019): 02015. http://dx.doi.org/10.1051/shsconf/20196402015.
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This paper describes the initial findings in an ongoing project aimed at bridging the gap between quantitative daylight simulations and visually perceived daylight quality, using 360° rendered panoramas and animations displayed in virtual reality. A daylight studio equipped with a simple façade pattern for a simultaneous Thermal Delight study was used as case study and test room. The test room was recorded with a 360° camera in sequential image series on days with different weather conditions. The resulting 360° VR time-lapse recordings were proposed for visual diurnal daylight analysis as supplement to thermal measurements used for calibrating and varying the façade pattern on site and in a corresponding thermal simulation model. A comparative experiment was set up to calibrate the perceived visual qualities and ambiance of daylight in 360° photographic panoramas viewed in VR, compared to the perceived visual qualities and ambiance of the real world site. Subjective visual evaluations of the virtual as well as the real space were recorded based on 15 people answering to a questionnaire. Results from the comparative experiment indicate a variety in perception of daylight quality and ambiance but a rather uniform perception of daylight brightness in 360° photographs that can be transferred to 360° rendered panoramas.
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Tripathi, R. N. "Lasers in Forensic Science." Himalayan Physics 1 (July 28, 2011): 32–33. http://dx.doi.org/10.3126/hj.v1i0.5170.
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The application of scientific methods of observation and analysis to detect and interpret clues materials at the site of crime as well as analysis of forensic exhibits in the laboratory which include, inter alia, elemental analysis, fl uorescenes of fingerprints, biological stains and other chemicals, particle size analysis, time lapse photography, Raman Laser Probe etc.Key words: Forensic scienceThe Himalayan PhysicsVol.1, No.1, May, 2010Page: 32-33Uploaded Date: 28 July, 2011
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JAMES, MIKE R., PENELOPE HOW, and PETER M. WYNN. "Pointcatcher software: analysis of glacial time-lapse photography and integration with multitemporal digital elevation models." Journal of Glaciology 62, no. 231 (February 2016): 159–69. http://dx.doi.org/10.1017/jog.2016.27.
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ABSTRACTTerrestrial time-lapse photography offers insight into glacial processes through high spatial and temporal resolution imagery. However, oblique camera views complicate measurement in geographic coordinates, and lead to reliance on specific imaging geometries or simplifying assumptions for calculating parameters such as ice velocity. We develop a novel approach that integrates time-lapse imagery with multitemporal DEMs to derive full three-dimensional coordinates for natural features tracked throughout a monoscopic image sequence. This enables daily independent measurement of horizontal (ice flow) and vertical (ice melt) velocities. By combining two terrestrial laser scanner surveys with a 73 days sequence from Sólheimajökull, Iceland, variations in horizontal ice velocity of ~10% were identified over timescales of ~25 days. An overall decrease of ~3.0 m surface elevation showed asynchronous rate changes with the horizontal velocity variations, demonstrating a temporal disconnect between the processes of ice surface lowering and mechanisms of glacier movement. Our software, ‘Pointcatcher’, is freely available for user-friendly interactive processing of general time-lapse sequences and includes Monte Carlo error analysis and uncertainty in projection onto DEM surfaces. It is particularly suited for analysis of challenging oblique glacial imagery, and we discuss good features to track, both for correction of camera motion and for deriving ice velocities.
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Albers, B., N. de Lange, and S. Xu. "AUGMENTED CITIZEN SCIENCE FOR ENVIRONMENTAL MONITORING AND EDUCATION." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-2/W7 (September 12, 2017): 1–4. http://dx.doi.org/10.5194/isprs-archives-xlii-2-w7-1-2017.
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Environmental monitoring and ecological studies detect and visualize changes of the environment over time. Some agencies are committed to document the development of conservation and status of geotopes and geosites, which is time-consuming and cost-intensive. Citizen science and crowd sourcing are modern approaches to collect data and at the same time to raise user awareness for environmental changes. <br><br> Citizen scientists can take photographs of point of interests (POI) with smartphones and the PAN App, which is presented in this article. The user is navigated to a specific point and is then guided with an augmented reality approach to take a photo in a specific direction. The collected photographs are processed to time-lapse videos to visualize environmental changes. Users and experts in environmental agencies can use this data for long-term documentation.
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Cassotto, Ryan, Mark Fahnestock, Jason M. Amundson, Martin Truffer, and Ian Joughin. "Seasonal and interannual variations in ice melange and its impact on terminus stability, Jakobshavn Isbræ, Greenland." Journal of Glaciology 61, no. 225 (2015): 76–88. http://dx.doi.org/10.3189/2015jog13j235.
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AbstractWe used satellite-derived surface temperatures and time-lapse photography to infer temporal variations in the proglacial ice melange at Jakobshavn Isbræ, a large and rapidly retreating outlet glacier in Greenland. Freezing of the melange-covered fjord surface during winter is indicated by a decrease in fjord surface temperatures and is associated with (1) a decrease in ice melange mobility and (2) a drastic reduction in iceberg production. Vigorous calving resumes in spring, typically abruptly, following the steady up-fjord retreat of the sea-ice/ice-melange margin. An analysis of pixel displacement from time-lapse imagery demonstrates that melange motion increases prior to calving and subsequently decreases following several events. We find that secular changes in ice melange extent, character and persistence can influence iceberg calving, and therefore glacier dynamics over daily-to-monthly timescales, which, if sustained, will influence the mass balance of an ice sheet.
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Van de Wiel, Lucy. "Prenatal Imaging: Egg Freezing, Embryo Selection and the Visual Politics of Reproductive Time." Catalyst: Feminism, Theory, Technoscience 4, no. 2 (October 16, 2018): 1–35. http://dx.doi.org/10.28968/cftt.v4i2.29908.
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In the last decade, two influential new reproductive technologies have been introduced that are changing the face of in vitro fertilization (IVF): egg freezing for “fertility preservation” and time-lapse embryo imaging for embryo selection. With these technologies emerge alternative visual representations of the assisted reproductive process and its relation to time. First, frozen egg photographs provide a lens onto contemporary reconfigurations of reproductive aging and stage a life-death dyad between the frozen cell and the embodied self, which drives treatment rationales for egg freezing. Second, time-lapse embryo imaging creates visual recordings of developing embryos in the incubator; the resultant quantified visual information can then be repurposed as a tool for predicting embryo viability. As these two sets of prenatal images reference dying eggs and non-viable embryos, they demonstrate a necropolitics of reproductive time, in which not only the generativity of new life but also the encounter with the death, finitude and fallibility of reproductive substances drives a widespread and intensified engagement with reproductive technologies.
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Reichelt-Brushett, Amanda, and Grayson Cooke. "Art-Science Interactions in the Destruction of an Archive: The after | image Project." Leonardo 50, no. 2 (April 2017): 121–26. http://dx.doi.org/10.1162/leon_a_01221.
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The after | image project is an inquiry into notions of material memory and forgetting and their intersection with archival preservation and dissolution. The project involves the intentional destruction by the authors of a photographic archive using various acids, chemical compounds and oxidizing agents; this destruction is recorded using time-lapse macrophotography. The authors thus challenge the often-intense human desire to retain a record of the past, a “hard copy” of memory. In the process of destroying the negative film, the authors create something new and by doing so are afforded the opportunity to revisit memories and their materialization within photographic media. In theoretical terms, the article focuses on the notion of “repeatability” as a trope that foregrounds the intertwining of artistic and scientific approaches. Collaborations like after | image facilitate the development of knowledge that is underpinned by both aesthetic qualities and experimental design and is thus both artistically and scientifically “true” at the same time.
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MINOWA, MASAHIRO, EVGENY A. PODOLSKIY, SHIN SUGIYAMA, DAIKI SAKAKIBARA, and PEDRO SKVARCA. "Glacier calving observed with time-lapse imagery and tsunami waves at Glaciar Perito Moreno, Patagonia." Journal of Glaciology 64, no. 245 (April 12, 2018): 362–76. http://dx.doi.org/10.1017/jog.2018.28.
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ABSTRACTCalving plays a key role in the recent rapid retreat of glaciers around the world. However, many processes related to calving are poorly understood since direct observations are scarce and challenging to obtain. When calving occurs at a glacier front, surface-water waves arise over the ocean or a lake in front of glaciers. To study calving processes from these surface waves, we performed field observations at Glaciar Perito Moreno, Patagonia. We synchronized time-lapse photography and surface waves record to confirm that glacier calving produces distinct waves compared with local noise. A total of 1074 calving events were observed over the course of 39 d. During austral summer, calving occurred twice more frequently than in spring. The cumulative distribution of calving-interevent time interval followed exponential model, implying random occurrence of events in time. We further investigated wave properties and found that source-to-sensor distance can be estimated from wave dispersion within ~20% error. We also found that waves produced by different calving types showed similar spectra in the same frequency range between 0.05–0.2 Hz, and that the amplitude of surface waves increased with the size of calving. This study demonstrates the potential of surface-wave monitoring for understanding calving processes.
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Kromer, Ryan, Gabe Walton, Brian Gray, Matt Lato, and Robert Group. "Development and Optimization of an Automated Fixed-Location Time Lapse Photogrammetric Rock Slope Monitoring System." Remote Sensing 11, no. 16 (August 13, 2019): 1890. http://dx.doi.org/10.3390/rs11161890.
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An automated, fixed-location, time lapse camera system was developed as an alternative to monitoring geological processes with lidar or ground-based interferometric synthetic-aperture radar (GB-InSAR). The camera system was designed to detect fragmental rockfalls and pre-failure deformation at rock slopes. It was implemented at a site along interstate I70 near Idaho Springs, Colorado. The camera system consists of five digital single-lens reflex (DSLR) cameras which collect photographs of the rock slope daily and automatically upload them to a server for processing. Structure from motion (SfM) photogrammetry workflows were optimized to be used without ground control. An automated change detection pipeline registers the point clouds with scale adjustment and filters vegetation. The results show that if a fixed pre-calibration of internal camera parameters is used, an accuracy close to that obtained using ground control points can be achieved. Over the study period between March 19, 2018 and June 24, 2019, a level of detection between 0.02 to 0.03 m was consistently achieved, and over 50 rockfalls between 0.003 to 0.1 m3 were detected at the study site. The design of the system is fit for purpose in terms of its ground resolution size and accuracy and can be adapted to monitor a wide range of geological and geomorphic processes at a variety of time scales.
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Deacy, William W., William B. Leacock, Lisa A. Eby, and Jack A. Stanford. "A time-lapse photography method for monitoring salmon (Oncorhynchus spp.) passage and abundance in streams." PeerJ 4 (June 14, 2016): e2120. http://dx.doi.org/10.7717/peerj.2120.
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Accurately estimating population sizes is often a critical component of fisheries research and management. Although there is a growing appreciation of the importance of small-scale salmon population dynamics to the stability of salmon stock-complexes, our understanding of these populations is constrained by a lack of efficient and cost-effective monitoring tools for streams. Weirs are expensive, labor intensive, and can disrupt natural fish movements. While conventional video systems avoid some of these shortcomings, they are expensive and require excessive amounts of labor to review footage for data collection. Here, we present a novel method for quantifying salmon in small streams (<15 m wide, <1 m deep) that uses both time-lapse photography and video in a model-based double sampling scheme. This method produces an escapement estimate nearly as accurate as a video-only approach, but with substantially less labor, money, and effort. It requires servicing only every 14 days, detects salmon 24 h/day, is inexpensive, and produces escapement estimates with confidence intervals. In addition to escapement estimation, we present a method for estimating in-stream salmon abundance across time, data needed by researchers interested in predator--prey interactions or nutrient subsidies. We combined daily salmon passage estimates with stream specific estimates of daily mortality developed using previously published data. To demonstrate proof of concept for these methods, we present results from two streams in southwest Kodiak Island, Alaska in which high densities of sockeye salmon spawn.
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Imai, K., T. Somfai, Y. Inaba, Y. Aikawa, M. Ohtake, S. Kobayashi, and K. Konishi. "208 TIME LAPSE CINEMATOGRAPHIC ANALYSIS OF CLEAVAGE AND BLASTULATION IN BOVINE EMBRYOS OBTAINED BY OVUM PICKUP AND IN VITRO FERTILIZATION." Reproduction, Fertility and Development 21, no. 1 (2009): 202. http://dx.doi.org/10.1071/rdv21n1ab208.
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Since the 1980s, several different bovine in vitro embryo production systems have been developed, and more than 291 000 embryos have been transferred throughout the world (Thibier M 2007 IETS Newsletter 25(4), 15–20). However, we have limited knowledge about the cleavage pattern of the first, second, and third cell divisions and the developmental activities of embryos during in vitro culture (IVC). The present study was conducted to determine the developmental activities of bovine embryos obtained by ovum pickup (OPU), in vitro maturation (IVM), and in vitro fertilization (IVF). We analyzed embryonic development by time-lapse cinematography (TLC). A total of 92 cumulus–oocyte complexes were collected by OPU from Japanese Black cows and were subjected to IVM and IVF as reported previously (Imai et al. 2006 J. Reprod. Dev. 52(Suppl.), S19–S29). Inseminated oocytes were cultured in microdrops of CR1aa medium supplemented with 5% calf serum covered by mineral oil in 5% CO2 in air at 38.5°C. Kinetics of embryo development were measured by TLC for 168 h after IVF by using a Cultured Cell Monitoring System (CCM–M1.4ZS, Astec, Fukuoka, Japan). A total of 672 photographs of the embryos were taken (1 photograph every 15 min) during IVC. Image stacks were analyzed by the CCM–M1.4 software. Timing of the first, second, and third cell divisions, blastulation, and embryonic contractions were recorded. The results are reported as time (h) passed after insemination. In total, 75 (81.5%) embryos cleaved and 61 (66.3%) embryos developed to the blastocyst stage. The first, second, and third cell divisions in these viable embryos occurred at 24.0 ± 0.5, 32.1 ± 0.2, and 39.4 ± 0.4 h (mean ± SE) after IVF, respectively. On the other hand, in nonviable embryos (those that failed to develop to the blastocyst stage; n = 14), these cell divisions occurred at 29.5 ± 2.2, 41.3 ± 3.3, and 57.2 ± 7.6 h after IVF, respectively. There tended to be a difference (P = 0.06; paired t-test) in the timing of the first cell division between viable and nonviable embryos. Blastulation of embryos began at 114.4 ± 1.1 h, embryos developed to the blastocyst stage at 127.3 ± 1.4 h, and blastocysts began to expand at 138.4 ± 1.7 h after IVF, respectively. During blastocyst development, embryonic contractions (shrinkage attributable to the rupture of the blastocoele) and tight-shrinkage (shrinking of the embryo to less than 70% of its surface area) were observed in all embryos. The mean numbers of contractions and tight-shrinkages in blastocysts were 5.3 ± 2.7 and 2.1 ± 1.0 times, respectively. The frequency of contractions from the beginning of blastulation to the blastocyst stage was significantly lower (P < 0.01) than after the blastocyst stage. It took 6.9 ± 4.6 h for the embryos to re-expand after the tight-shrinkages. These results indicate that viable in vitro-produced embryos can be selected at early stages by TLC. Further studies are necessary to clarify the importance of the pulsating activity in OPU–IVF embryos. This work was supported by the Research and Development Program for New Bio-industry Initiatives.
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Conley, E., and G. Cloud. "Whole-Field Measurement of Ice Displacement and Strain Rates." Journal of Offshore Mechanics and Arctic Engineering 110, no. 2 (May 1, 1988): 169–71. http://dx.doi.org/10.1115/1.3257046.
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The flow of glacier ice is mapped using high-resolution photography and noncoherent light speckle interferometry. Time-lapse, double-exposures of a straining surface yield Young’s fringes when the resulting image is interrogated by a narrow beam of coherent light. Such fringe patterns, when corrected for camera motion, are indicative of the surface displacement occurring between exposures. Results of glacier field experiments are consistent with those garnered by conventional methods at the Nisqually Glacier, Washington. The interferometric method seems amenable to other geophysical applications, such as mapping sea ice flow, using terrestrial or space-based camera platforms.
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Revuelto, J., E. Alonso-González, and J. I. López-Moreno. "Generation of daily high-spatial resolution snow depth maps from in-situ measurement and time-lapse photographs." Cuadernos de Investigación Geográfica 46, no. 1 (June 24, 2020): 59–79. http://dx.doi.org/10.18172/cig.3801.
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Acquiring information on snow depth distribution at high spatial and temporal resolution in mountain areas is time consuming and generally these acquisitions are subjected to meteorological constrains. This work presents a simple approach to assess snow depth distribution from automatically observed snow variables and a pre-existing database of snow depth maps. By combining daily observations of in-situ snow depth, georectified time-lapse photography (snow presence or absence) and information on snowpack distribution during annual snow peaks determined with a Terrestrial Laser Scanner (TLS), a method was developed to simulate snow depth distribution on day-by-day basis. This method was tested is Izas Experimental Catchment, in the Central Spanish Pyrenees, a site with a large database of TLS observations, time-lapse images and nivo-meteorological variables for six snow seasons (from 2011 to 2017). The contrasted snow climatic characteristics among the snow seasons allowed analysis of the transferability of snowpack distribution patterns observed during particular seasons to periods without spatialized snow depth observations, by TLS or other procedures. The method i) determines snow depth ratio among the observed maximum snow depths and all other snow map pixels at the TLS yearly snow peak accumulation, ii ) rescales these ratios on a daily basis with time-lapse images information and iii) calculates the snow depth distribution with; the rescaled ratios and the snow depth observed at the automatic weather station. The average of the six TLS observed peaks was the combination showing optimal overall applicability. Despite its simplicity, these simulated values showed encouraging results when compared with snow depth distribution observed on particular dates. This was due primarily to the strong topographic control of small scale snow depth distribution on heterogeneous mountain areas, which has high inter- and intra-annual consistencies.
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Bergeron, Katherine. "The castrato as history." Cambridge Opera Journal 8, no. 2 (July 1996): 167–84. http://dx.doi.org/10.1017/s0954586700004675.
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One of the final scenes of Farinelli, Il Castrato, dir. Gerard Corbiau (Sony Pictures Classics, 1994), shows a solar eclipse witnessed, eighteenth-century style, by members of the court of Philip V of Spain around 1740. Restless spectators squint through pieces of tinted glass prepared in the smoke of a small fire. It is a precious visual detail, a jot of history in this sumptuously though often inaccurately detailed film that offsets the melodrama to follow. Without warning, a wind, helped along by corny, time-lapse photography, ushers in a sea of Goya-like clouds. A murmur passes through the entourage; eerie blackness falls on the court.
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Dalin, P., S. Kirkwood, A. Moström, K. Stebel, P. Hoffmann, and W. Singer. "A case study of gravity waves in noctilucent clouds." Annales Geophysicae 22, no. 6 (June 14, 2004): 1875–84. http://dx.doi.org/10.5194/angeo-22-1875-2004.
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Abstract. We present a case study of a noctilucent cloud (NLC) display appearing on 10-11 August 2000 over Northern Sweden. Clear wave structures were visible in the clouds and time-lapse photography was used to derive the parameters characterising the gravity waves which could account for the observed NLC modulation. Using two nearby atmospheric radars, the Esrange MST Radar data and Andoya MF radar, we have identified gravity waves propagating upward from the upper stratosphere to NLC altitudes. The wave parameters derived from the radar measurements support the suggestion that gravity waves are responsible for the observed complex wave dynamics in the NLC.
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Koptyra, Katarzyna, and Marek R. Ogiela. "Steganography in IoT: Information Hiding with APDS-9960 Proximity and Gestures Sensor." Sensors 22, no. 7 (March 29, 2022): 2612. http://dx.doi.org/10.3390/s22072612.
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This article describes a steganographic system for IoT based on an APDS-9960 gesture sensor. The sensor is used in two modes: as a trigger or data input. In trigger mode, gestures control when to start and finish the embedding process; then, the data come from an external source or are pre-existing. In data input mode, the data to embed come directly from the sensor that may detect gestures or RGB color. The secrets are embedded in time-lapse photographs, which are later converted to videos. Selected hardware and steganographic methods allowed for smooth operation in the IoT environment. The system may cooperate with a digital camera and other sensors.
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Mykytka, Iryna. "Noun Compounds in Photography." Atlantis. Journal of the Spanish Association for Anglo-American Studies 42, no. 2 (December 23, 2020): 72–98. http://dx.doi.org/10.28914/atlantis-2020-42.2.04.
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Compounding is considered to be the most productive device in coining new words in many languages, including English. Numerous studies have dealt with compounds in recent decades. However, in spite of a large number of works on compounds in the general language, few authors have dealt with compounds in specialized languages. We find studies on compounds in science and technology or architecture, just to mention a few. The present article focuses on compound nouns in photography, a field that has to date not been researched in this regard but is extremely rich and interesting. The aim of this study is to outline the types of noun compounds in photography and to illustrate the range of semantic relationships and morphosyntactic patterns that occur in coining new noun compounds in the photography lexis. In order to carry out the study, a corpus-based approach was followed. The data was gathered from professional photography blogs providing authentic up-to-date lexis. The results show that there is a large presence and variety of patterns of nouncompounds in photography, such as noun compounds made up of noun + noun (photo album, time-lapse, shutter speed), verb + noun (catchlight, burn tool, protect filter), adjective + noun (white balance, softbox, glowing filter) and phrase compounds (depth of focus, rule of thirds, pan and tilt).
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James, Deborah. "The Alchemy of a Corpus of Underwater Images." Nature and Culture 15, no. 3 (December 1, 2020): 225–48. http://dx.doi.org/10.3167/nc.2020.150301.
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Through an ecocinema lens, an unconventional corpus of photographs of Carysfort Reef, one of seven iconic coral reefs along the Florida Reef Tract, represents something of an extreme time-lapse series. In the absence of a cohesive underwater documentary record at the time when the Florida Reef Tract is undergoing the most extensive reef restoration in the world, speculation allows us to search for patterns in damaged places with incomplete information and practice a form of multispecies storytelling of our encounters. Taken in 1966, 2003, 2014, and 2019, these images are evidence of cultural moments in our changing relationship with this reef in the context of anthropocentrism, the emergence of an alternative environment spectatorship of awareness, and a baseline for localized social change.
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Rimpapa, Zlatan, Emin Sofić, Aida Šapčanin, Jasmin Toromanović, and Ismet Tahirović. "Inhibition of Neutral Red Photolysis with Different Antioxidants." Bosnian Journal of Basic Medical Sciences 7, no. 1 (February 20, 2007): 55–57. http://dx.doi.org/10.17305/bjbms.2007.3091.
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Neutral red is a dye the azine structure which has been used as an acido-base indicator and a dye in histochemistry. In 1960 Goldhaber introduced Neutral red into the medium of resorbing bone cultures to localize the osteoclast in the living cultures. Using time-lapse microcinematography in order to follow the osteoclasts, he reported excellent contrast could be obtained with Neutral red due to the avidity of osteoclasts for this dye. Unfortunately, however, the photodynamic effect resulting from subsequent exposure of these cultures to light precluded this approach, and again in 1963. it was observed that the death of the osteoclasts was probably due to a photodynamic effect related to the dye in the cell, the presence of oxygen and the frequent exposure of light by our time-lapse photography. VIS and UV irradiation induced photolysis of Neutral red, and from Neutral red cation produced with photons a Neutral red radical. This Neutral red radical can be inhibited with action of an antioxidant, such as melatonin, glutathione, ascorbic acid, E vitamin, etc. We developed an assay with Neutral redphotolysis which utilizes a VIS and UV irradiation technique for quantification the inhibition of photolysis with action of an antioxidant. In this method Neutral red acts double, as a free radical generator and as a photosensitizer.
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Tafreshi, Babak A. "TWAN: The World at Night." Proceedings of the International Astronomical Union 5, S260 (January 2009): 354–57. http://dx.doi.org/10.1017/s1743921311002523.
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AbstractThe World at Night (TWAN) is a global program to produce, collect, and present stunning photographs and time-lapse videos of the world's most beautiful and historic sites against the night-time backdrop of stars, planets, and celestial events. TWAN is a bridge between art, science and humanity to bring the message of peace, concealed in the sky. Organised by “Astronomers Without Borders”, the project consist of world's best night sky photographers in over countries and coordinators, regional event organisers, and consultants. TWAN was also designated as a Special Project of the International Year of Astronomy 2009. While the project's global exhibitions and educational events peaked during IYA2009, TWAN is planned for long term in several phases and will continue to create and exhibit images in the next years.
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Rice, A. L., D. S. M. Billett, M. H. Thurston, and R. S. Lampitt. "The Institute Of Oceanographic Sciences Biology Programme In The Porcupine Seabight: Background And General Introduction." Journal of the Marine Biological Association of the United Kingdom 71, no. 2 (May 1991): 281–310. http://dx.doi.org/10.1017/s0025315400051614.
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An intensive investigation of the benthic biology of the Porcupine Seabight, to the south-west of Ireland, was carried out by biologists from the Institute of Oceanographic Sciences Deacon Laboratory (IOSDL) between 1977 and 1986. More than 400 benthic samples were obtained during the study using towed gears and corersover the depth range 200 to 4500 m. Transect and time-lapse photography was used extensively. This paper summarises the techniques employed and provides an analysis of the depth and seasonal coverage. In addition a review is provided of available data on the physical, chemical and geological characteristics of the Porcupine Seabight area, including information collected during the IOSDL study. Finally, existing publications based on the study are listed.