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Baumgartner, Hannah M., Rebecca DiDomenica, Peter T. Hu e Suzanne Thomas. "Pilot Perceptions of Wire Strikes in Agricultural Aviation Operations". Aerospace Medicine and Human Performance 95, n. 6 (1 giugno 2024): 305–12. http://dx.doi.org/10.3357/amhp.6425.2024.
Testo completoAbstract (sommario):
INTRODUCTION: Agricultural aircraft operations are associated with unique challenges. In particular, these include maintaining awareness of obstacles associated with flight at very low altitudes. Wire strikes are a common cause of accidents in these operations.METHODS: Focus groups were completed during the 2022 Ag Aviation Expo hosted by the National Agricultural Aviation Association with pilots who had experienced wire-strike events (N = 22). The researchers coded the transcripts using a human factors framework.RESULTS: Notably, unplanned “trim passes” were a key stage of flight during wire-strike events. Cognitive risk factors that may have affected their performance included situation awareness, decision-making choices, and pressure to perform. Over half of subjects reported being aware of the wire before collision. Possible prevention strategies include not spraying the field due to safety risks, paying better attention to where they were in the field, and avoiding deviation from the planned route.DISCUSSION: Wire-strike events often occur due to momentary lapses in attention, even when the pilot is already aware of the wire. This study shows that targeted approaches to prevent wire strikes in agricultural aviation operations require addressing a number of cognitive risks and human factors, rather than implementing increased preflight surveillance. These results have implications for preventing future wire-strike accidents based directly on pilot perceptions, both within agricultural operations and general aviation more broadly.Baumgartner HM, DiDomenica R, Hu PT, Thomas S. Pilot perceptions of wire strikes in agricultural aviation operations. Aerosp Med Hum Perform. 2024; 95(6):305–312.
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Mendonca, Flavio A. C., Julius Keller e Chenyu Huang. "An analysis of wildlife strikes to aircraft in Brazil: 2011-2018". Journal of Airline and Airport Management 10, n. 2 (21 dicembre 2020): 51. http://dx.doi.org/10.3926/jairm.160.
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Purpose: Aircraft accidents due to wildlife hazards have become a growing safety and economic problem to the Brazilian and international aviation industries. These safety occurrences have resulted in significant direct and indirect economic losses as well injuries and fatalities worldwide. The purpose of this study was to develop empirical information obtained from the analysis of wildlife strike and aircraft operations data in Brazil that could be used for accident prevention efforts.Design/methodology: The research team collected and analyzed aircraft operations as well as wildlife strike data from the 32 busiest commercial airports in Brazil, from 2011 through 2018. Researchers obtained the number of aircraft operations at each of those 32 Brazilian airports from the Brazilian air traffic operations annual reports published by the Air Traffic Control Department. Wildlife strike data from the studied airports were obtained from the Brazilian national wildlife strike database. Descriptive data analysis was adopted to provide an intuitive and overall trend of wildlife strikes at and the 32 busiest commercial airports in Brazil.Findings: Results indicate that the number of wildlife strikes at and around the investigated airports increased 70% even though the number of aircraft operations at these airports declined by 12% during the period studied. Birds were involved in 88% of the reported events. Most reported strikes (59%) and damaging strikes (39%) occurred during the arrival phases-of-flight. Most (33%) strikes were reported by airport personnel. A finding of concern was that the majority of wildlife strikes (97%) and damaging wildlife strikes (96%) occurred within the airport environment.Originality/value: The current project contributes to the safety management of wildlife hazards in Brazil by conducting a comprehensive analysis of wildlife strike and aircraft operations data (2011-2018) in the 32 busiest Brazilian commercial airports.
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Carretero-Navarro, Iván, e Eva Espinar Ruiz. "Labor conflicts in the Spanish press: strikes as a reflection of the contradiction between capital and labor". Disjuntiva. Crítica de les Ciències Socials, n. 1 (15 luglio 2019): 40. http://dx.doi.org/10.14198/disjuntiva2019.1.02.
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A qualitative content analysis has been applied to a sample of news related to labor strikes from three major newspapers in Spain. Results suggest that news media mainly focus on the immediate negative consequences of the strikes rather than on causes and further explanations. Strikes are portrayed as isolated occurrences that happen because of disagreements between specific companies and workers. The attention is put on events (demonstrations, disorders, economic losses, etc.) and not on the structural causes of the strikes: the contradiction between capital and labor and the consequent tension among social classes. Within this frame, strikers and their organizations are delegitimized and isolated from the rest of the society. News media readers are categorized as consumers, and their interests are depicted as alien or even opposed to those of striking workers.
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Gauchman, Mykhailo. "WORKERS OF DISTRICT TOWN: THE PLANT’S WORKERS OF LUHANS’K IN LABOR’S CONFLICTS AND REVOLUTIONARY WAVES DURING THE FIRST RUSSIAN REVOLUTION AND THE FIRST WORLD WAR". City History, Culture, Society, n. 3 (30 ottobre 2017): 51–72. http://dx.doi.org/10.15407/mics2019.03.051.
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The article deals with the collective actions of plant workers in Luhans’k (inRussian pronunciation – Lugansk) in labor conflicts during the First Russianrevolution (1905–1907) and the First World War (1914–1918). This town wasone of the main towns of industrial Donbass and the center of Slovianoserbiandistrict of Ekaterinoslavian province.The relationships between administration and workers in Luhans’k areinvestigated on the materials of clerical work of Ekaterinoslavian provinceand memoirs of participators on events. These sources are especially aboutthe behavior of workers from two big industrial enterprises – the Gartmanplant and the Cartridges plant. In the crisis periods, such as revolutions andwars, the social-political relations are sharpened and changeable. And revolutionsand wars left behind enough historical sources for studying workers’history.In the Luhans’k’s enterprises, there were – during the First Russian Revolution– the general town’s strike in February 1905, the attempt of the strike tothe 1st of May 1905 in the Gartman plant, the strike in the Gartman plant inJuly 1905, the mass unrest in December 1905, the attempt of strike to the 1stof May 1906 in the Gartman plant, the lockout in the Gartman plant in March1907 and the general town’s strike in July 1916 in the time of social-economicscrisis during the First World War. The studying of strikes, attempts ofstrikes and mass unrests in 1905–1907 and 1916 allows defining some featuresof collective’s activity of plant’s workers:1) the inconsistent solidarity of workers in the times of strikes. The generalunderstanding of oppressed status and necessity of fighting for their rightsspread among the workers during the strike’s waves, but this solidarity ofworkers didn’t cause to cooperative planned activities;2) the crisis of vertical relationships between administrators and workersin the time of strikes of 1905 and 1916. In Patron plant subordination and paternalismwere saved during the strike in February 1905, unlike in Gartmanplant, but not in the strike in 1916;3) the influence on workers of the revolutionary movement. Revolution ideasand local activists of illegal political parties were impacted of workers’ moods in the crisis times. In 1905 increasing of social-democrats’ activity in Luhans’kwas the aftermath of town’s strikes. But in 1916 the spreading of revolutionideas preceded the emergence in workers’ dissatisfaction with their ownsituation during the social-economics crises, which was the cause of generaltown’s strike;4) the workers’ capacity to spontaneous self-organization during strikesand making the continuous organization forms in the Gartman plant. In thisenterprise in 1906 was formed two workers’ organizations: pawnshop andprofessional association. This association conflicted with plant’s administrationin 1907 and headed the strikes in 1906.
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Islam, Muhammad Shahidul. "Stop playing football in lightning: An urgent issue". International Journal of Sport, Exercise and Health Research 5, n. 1 (30 maggio 2021): 21–22. http://dx.doi.org/10.31254/sportmed.5106.
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A bolt of lightning hits occurs when there are electrical imbalances between storm clouds and the ground, or within the clouds themselves. The majority of lightning strikes inside clouds [1] . However, this lightning is a natural phenomenon that occurs when lightning strikes the earth. Lightning strike, one of the most severe convective natural events, occurs suddenly almost everywhere on the earth’s surface. Around the world, more than 1600–2400 thunderstorms occur at any given time, with 50,000 occurring per day
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Priadi, Ramadhan, e Teuku Hafid Hududillah. "Risk Level Analysis of Lightning Strike with Simple Additive Weighting Method in Gowa Region". Jurnal Penelitian Fisika dan Aplikasinya (JPFA) 8, n. 1 (30 giugno 2018): 17. http://dx.doi.org/10.26740/jpfa.v8n1.p17-24.
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Gowa regency is one of the areas in the province of South Sulawesi that has a high potential of lightning events. This is influenced by its geographical location which is close to the mountainous area. This research purpose to analyze the risk level of lightning strike hazard in Gowa regency using Simple Additive Weighting (SAW) method. This research uses lightning strike data from lightning detector boltek sensor recorded by LD2000 software. The data used is event data in 2015 with sensor coordinates of 5.218° S and 119.470° E and using a density grid of 0.01o. The results for Gowa district have a total density of 26797 strikes/kilometers with clustered areas are Tinggi Moncong subdistricts and Bungaya subdistricts which each have a density value of 10443 strikes/kilometers and 5197 strikes/kilometers. The results of this study are expected to represent the level of lightning vulnerability as a reference for making adequate grounding system in areas with high lightning activity in Gowa regency.
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Erickson, Christopher L., e Daniel J. B. Mitchell. "Information on Strikes and Union Settlements: Patterns of Coverage in a “Newspaper of Record”". ILR Review 49, n. 3 (aprile 1996): 395–407. http://dx.doi.org/10.1177/001979399604900301.
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The authors investigate whether the New York Times' coverage of strikes and non-strike wage Settlements in large bargaining units changed during the 1980s, a time when a “transformation” of industrial relations is said to have taken place. Although the total number of New York Times articles on such events declined during the 1980s, the authors find that when appropriate control variables are included in the analysis, the apparent drop in coverage disappears. Important variables determining the extent of news coverage were occurrence of a strike, strike duration, number of workers involved, occurrence of federal intervention, key industry status (that is, whether the affected industry was among those industries identified as exceptionally important for wage-setting), and proximity to New York City. They speculate that the reduced number of articles may simply reflect a decreased incidence of strikes.
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Stark, Alejo. "Containing the Surplus Rebellion: Prison Strike/Prison Riot". New Global Studies 14, n. 2 (25 luglio 2020): 193–203. http://dx.doi.org/10.1515/ngs-2020-0015.
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AbstractThe 2016 and 2018 wave of prison strikes in the United States presents itself as an extraordinary flashpoint of the prisoner resistance movement. But how might these events be understood in relation to what has been broadly characterized as an “age of riots”? Following Joshua Clover’s characterization of the contemporary riot in Riot. Strike. Riot. as a “surplus rebellion” of racialized “surplus populations” and given the characterization of the contemporary carceral state as a warehouse to contain such racialized populations, this essay characterizes the contemporary wave of prison riots accordingly as a “surplus rebellion.” More specifically, it focuses on the Kinross prison strike-riot that broke out in September 2016 in Michigan’s Kinross prison in order to derive some general parallels between the surplus rebellion and the singularity of recent prison strikes.
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Munger, Frank. "Legal Resources of Striking Miners: Notes for a Study of Class Conflict and Law". Social Science History 15, n. 1 (1991): 1–33. http://dx.doi.org/10.1017/s014555320002099x.
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Union miners stand together,Heed no operator’s tale.Keep your hands upon the dollar,And your eyes upon the scale.—verse from “Miner’s Lifeguard” [Silverman 1975: 389]In 1895, Fayette County, West Virginia, a leading coal county in the southern West Virginia coal fields, experienced widespread strikes by miners. The strikes were remarkable because, in an American industry known for violent labor relations and intensive union organizing since the appearance of the Molly Maguires in Pennsylvania before 1880, this was the first major strike in southern West Virginia. We might attempt to understand the role of law and public authority in these strikes in terms of legal repression by means of the labor injunction, labor conspiracy laws, and strikebreaking by the police and military. But none of these occurred in Fayette in 1895, though the later history of labor conflict in West Virginia is replete with all of them. In another way, however, the legal events accompanying these strikes are far more remarkable and challenge us to examine more subtle connections between class conflict and law.
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Ribeiro, José Carlos, e Devanildo Damião. "Analysis and evaluation of the risks of bird strikes in the international Guarulhos airport surroundings". Independent Journal of Management & Production 10, n. 4 (1 agosto 2019): 1193. http://dx.doi.org/10.14807/ijmp.v10i4.956.
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The first catastrophic avian impact victim killed Cal Rogers in 1912 in the United States. The most recent and catastrophic accident by bird striking occurred on August 11, 2016 with Airbus A320 aircraft apparently after striking at least one bird upon takeoff from New York's LaGuardia Airport. The aircraft landed safely on Hudson River. Fortunately everybody still alive, even though the loss of aircraft hull. The purpose of this study is to present the panorama of the bird strikes, to identify, evaluate the propensities and to present the propositions to mitigating the bird strike risks in the surroundings of the Guarulhos International Airport (SBGR). This study is based on probabilistic and heuristic methods to infer about the risk propensities of avian strikes. The study of bird strikes and risk management are essential to anticipate and minimize the severity and reduction of frequency of occurrences. The results of the statistical analyze point to the flight densities and the frequency of events due to the migratory periods of the neotropic and endemic birds. Native populations of birds travel between the Serra do Mar, the Mata Atlântica and forests around the airport to the Serra da Cantareira forest. Impact events are strongly correlated with the density of aircraft movements in the SBGR.
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Gasser, Benedikt. "Cases of Lightning Strikes during Mountain-Sports Activities: An Analysis of Emergencies from the Swiss Alps". International Journal of Environmental Research and Public Health 19, n. 7 (26 marzo 2022): 3954. http://dx.doi.org/10.3390/ijerph19073954.
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Background: Lightning strikes are a risk during mountain-sport activities. Yet little is known about the prevalence of injuries related to lightning strikes during mountain hiking, backcountry skiing, or high-altitude mountaineering. This study therefore examined the occurrence and characteristics of lightning-strike-related emergencies during mountain-sport activities in the Swiss Alps. Methods: We analyzed 11,221 alpine emergencies during mountain hiking, 4687 during high-altitude mountaineering, and 3044 during backcountry skiing in the observational period from 2009 to 2020. Identified cases were analyzed in detail regarding age, sex, the time of occurrence, altitude, location, the severity of the injury as quantified by its NACA Score (National Advisory Committee for Aeronautics Score), and injury pattern. Results: We found no cases related to backcountry skiing. Eight cases of lightning strikes during mountain hiking (four female and four male) were identified. The mean age was 32.5 ± 17.5 years, the mean NACA Score was 2.5 ± 1.9, and the mean altitude was 1883.8 ± 425.7 m. None of these cases were fatal, and only one victim was seriously injured. Fifteen cases were identified during high-altitude mountaineering (four female and 11 male). The mean age was 38.7 ± 5.2 years, the mean NACA Score was 3.1 ± 2.5, and the mean altitude was 3486.4 ± 614.3 m. Two lightning strikes were fatal. In these two cases, rope partners were injured by a lightning strike (NACA Score = 4). Most cases were on relatively exposed terrain, such as the Matterhorn Hörnligrat or the Eiger Mittellegigrat. Discussion: The typical victims were 30–40-year-old men. It is possible that the lightning strikes are a consequence of a lower risk aversion among these alpinists, which is be supported by the fact that most of the events occurred on famous mountains such as the Matterhorn or Eiger. Furthermore, since most of the locations were on relatively exposed terrain where one could not quickly find shelter, we recommend careful tour planning with serious consultation of the weather forecast and the likelihood of thunderstorms before climbing exposed sections to prevent emergencies related to lightning strikes.
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Veina, V. Harsha, S. P. Ramanathan, S. Kokilavani, S. G. Patil, S. D. Pawar, V. Gopalakrishnan, Somnath Mahapatra e P. Balasubramaniam. "Spatial Vulnerability Assessment and Diurnal Climatology of Lightning Events in Tamil Nadu, India". International Journal of Environment and Climate Change 13, n. 9 (6 luglio 2023): 490–501. http://dx.doi.org/10.9734/ijecc/2023/v13i92261.
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The research probes into the seven agro climatic zones in Tamil Nadu which are highly vulnerable to lightning strikes, as well as the human fatalities caused by Cloud to Ground lightning. The purpose of the study is to find out the vulnerable hotspots and diurnal climatology of the Cloud to Ground lightning strikes during the northeast monsoon, southwest monsoon, and summer seasons. Heat maps are used for the lightning strikes using ArcGIS software and the diurnal climatology was performed by interpolating the data from the lightning location network into a 3-hour resolution. In vulnerability analysis, Northeastern zone is more prone to lightning during Southwest and Northeast Monsoon. On the other hand, High rainfall zone and Hilly zone are vulnerable to lightning in summer season. The Northeast monsoon has the highest lightning frequency ratio, followed by the summer. The maximum rate of strikes occurred between 10-15 hrs IST and showed a peak range between 10:00 to 12:00 hrs IST. A labor-intensive agricultural economy is linked to higher rates of lightning-related deaths and injuries. The results of this research could be useful in developing lightning climatology for the future climatic condition for Tamil Nadu.
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Biela, Adam. "The Beginning of Agoral Gatherings in Poland and Their Macro-Systemic Political and Economic Consequences: Events of Lublin July 1980". Advances in Politics and Economics 3, n. 4 (23 settembre 2020): p19. http://dx.doi.org/10.22158/ape.v3n4p19.
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The aim of this study is a psychological-historical analysis of the sequence of events in recent Polish history, in which Lublin July 1980 played a key role as a mental bridge between the first visit-pilgrimage of Pope John Paul II to Poland 2-9 June 1979, and the strikes of “Solidarity”, which began in August 1980 and culminated in the signing of strike agreements with the authorities of the People’s Republic of Poland in Gda?sk, Szczecin and Jastrz?bie Zdrój. We have shown that the behaviour of the participants of the strikes in state enterprises in the Lublin region allows for their qualification as agoral gatherings, with their moral and cultural patterns rooted in the phenomena of psychosocial meetings between Poles and Pope John Paul II. We have shown that the events in Lublin have become a field for the psychosocial exploration of democratic behaviours in striking factories—in the face of the power of the totalitarian system in the People’s Republic of Poland. In this way, Lublin July 1980 became a link for social learning based on moral, patriotic and religious values—which led to “Solidarity” strikes all over Poland. These strikes were another link in the process of realization of self-determination of the Polish people as a sovereign state. The power of agoral processes created by the “Solidarity” movement in August 1980 did not manage to stifle any repressive tactics and strategies of the authorities of the totalitarian system, including the horrors of martial law in Poland. The movement applied the principle of non-violence to overcome totalitarian violence, which collapsed like a proverbial “house of cards,” first in Poland, and then throughout Central and Eastern Europe. It led to peaceful change in the psychosocial, political and macroeconomic situation of countries such as Poland, Hungary, Czechoslovakia, Bulgaria, the GDR, Romania, Lithuania, Latvia, Estonia, Russia and Albania.
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Weaver, Craig S., e Glenn E. Baker. "Geometry of the Juan de Fuca plate beneath Washington and northern Oregon from seismicity". Bulletin of the Seismological Society of America 78, n. 1 (1 febbraio 1988): 264–75. http://dx.doi.org/10.1785/bssa0780010264.
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Abstract Earthquake hypocenters within the subducting Juan de Fuca plate beneath Washington and northern Oregon are interpreted as showing that the direction of plate dip changes from northeast beneath the Puget Sound region to east-southeast beneath southwestern Washington. The shallowest hypocenters within the Juan de Fuca plate are between 30- to 40-km depth, and the distribution of these events strikes north-northeast from near the mouth of the Columbia River to the northern Olympic Mountains. The distribution of hypocenters between 40 to 50 km generally strikes parallel with the shallowest events, but shows a significant broadening beneath the eastern Olympic Mountains and Puget Sound. Events with depths greater than 50 km south of the 1965 Seattle earthquake (mb = 6.5) strike north-northeast, approximately parallel with the shallower distributions; however, north of this event, the distribution of these deeper hypocenters strikes northwest. This change in the distribution of earthquake hypocenters reflects an upward arching of the Juan de Fuca plate plate beneath Puget Sound compared with the depth of the plate beneath southwestern Washington. The T axis calculated for the 1949 South Puget Sound earthquake (MS = 7.1) is oriented to the southeast, and the 20° plunge of the T axis is in good agreement with the plate dip angle determined from the earthquake hypocenters. We conclude that the 1949 earthquake resulted at least in part from down-dip tensional forces within the subducting Juan de Fuca plate. One consequence of the change in the direction of plate dip is that volcanic front in Washington is everywhere perpendicular to the dip of the Juan de Fuca plate.
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Sousasantos, Jonas, José Humberto Andrade Sobral, Esfhan Alam Kherani, Marcelo Magalhães Fares Saba e Diovane Rodolfo de Campos. "Relationship between ionospheric plasma bubble occurrence and lightning strikes over the Amazon region". Annales Geophysicae 36, n. 2 (9 marzo 2018): 349–60. http://dx.doi.org/10.5194/angeo-36-349-2018.
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Abstract. The vertical coupling between the troposphere and the ionosphere presents some remarkable features. Under intense tropospheric convection, gravity waves may be generated, and once they reach the ionosphere, these waves may seed instabilities and spread F and equatorial plasma bubble events may take place. Additionally, there is a close association between severe tropospheric convection and lightning strikes. In this work an investigation covering an equinox period (September–October) during the deep solar minimum (2009) presents the relation between lightning strike activity and spread F (equatorial plasma bubble) detected over a low-latitude Brazilian region. The results show a considerable correlation between these two phenomena. The common element in the center of this conformity seems to be the gravity waves. Once gravity waves and lightning strikes share the same source (intense tropospheric convection) and the effects of such gravity waves in the ionosphere include the seeding of instabilities according to the gravity waves magnitude, the monitoring of the lightning strike activity seems to offer some information about the subsequent development of spread F over the equatorial region. Keywords. Ionosphere (equatorial ionosphere)
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Triguero-Mas, Margarita, Èrica Martínez-Solanas, Jose Barrera-Gómez, David Agis, Noemí Pérez, Cristina Reche, Andrés Alastuey, Xavier Querol, Katherine Pérez e Xavier Basagaña. "Public Transport Strikes and Their Relationships With Air Pollution, Mortality, and Hospital Admissions". American Journal of Epidemiology 189, n. 2 (30 settembre 2019): 116–19. http://dx.doi.org/10.1093/aje/kwz202.
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Abstract There is limited suggestive evidence of relationships between public transport strikes and either increased air pollution or worse population health. In this study we aimed to assess whether public transport strikes were associated with increases in health events (overall, cardiovascular and respiratory mortality, and cardiovascular and respiratory hospitalizations). We also explored whether air pollution mediated those associations. We used data from the city of Barcelona (Spain) for the period 2005–2016 on strikes, health events, and ambient air pollution (nitrogen dioxide, nitrogen monoxide, particulate matter (PM) with an aerodynamic diameter ≤10 μm, PM with an aerodynamic diameter ≤2.5μm, PM with an aerodynamic diameter ≤1μm, number of particles with a diameter greater than 5 nm per cm3 (particle number concentration), and black carbon). We used linear and quasi-Poisson regression models to explore the associations between air pollution and public transport strikes and between public transport strikes and health outcomes. We also investigated potential causal mediation by air pollution. Overall, this study suggested that public transport strikes are associated with increased overall mortality, respiratory mortality, and respiratory hospitalizations. However, our findings suggest that such increases are not mediated by the increase in air pollution. Our results indicate the need to further investigate these relationships and potential mechanisms.
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Shipman, Jeffrey, Brittany Carver, Kelly Painter e Stacia Shipman. "The Dangerous Life of a Storm Chaser: A Lightning Strike Injury Causing Serious Injury". Journal of Investigative Medicine High Impact Case Reports 8 (gennaio 2020): 232470962092556. http://dx.doi.org/10.1177/2324709620925566.
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Lightning strikes to people are rare events that cause significant injuries and mortality when they do occur. We describe an uncommon case of a storm chaser in Oklahoma who was struck by lightning who suffered cutaneous burns, bilateral tympanic membrane ruptures, as well as pulmonary edema, which is an atypical finding in survivors. This case report highlights several injury patterns seen in lightning strike cases and provides evidence that these patients should be managed at a center with multidisciplinary services available.
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Bent, Allison L., e Donald V. Helmberger. "A re-examination of historic earthquakes in the San Jacinto fault zone, California". Bulletin of the Seismological Society of America 81, n. 6 (1 dicembre 1991): 2289–309. http://dx.doi.org/10.1785/bssa0810062289.
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Abstract The high level of seismic activity and the potential for large earthquakes in the San Jacinto fault zone, southern California, make it desirable to have accurate locations and source parameters for as many previous events as possible. Prior to the installation of a dense seismic network in this region, earthquakes were located using only a few stations with generally poor azimuthal coverage resulting in considerable uncertainty in the locations. We relocate and obtain moment estimates for historic (pre-WWSSN) earthquakes in the western Imperial Valley by comparing the waveforms and travel times with recent earthquakes in the region. All the events are in the ML 5.5 to 6.5 range. The historic earthquakes of interest occurred in 1937, 1942, and 1954. We use the 1968 Borrego Mountain, 1969 Coyote Mountain, and 1987 Elmore Ranch earthquakes as calibration events. We employ regional and teleseismic data from continuously operating stations, with Pasadena, DeBilt, Berkeley, Ottawa, and St. Louis recording most of the events. The waveforms imply that all the events are almost pure strike-slip events on vertical or near-vertical faults. Approximate values for the strikes were obtained and are within the range of observed strikes for well-studied earthquakes in this region. The earthquakes are relocated by comparing S-P and surface-wave - S travel times of historic events with the presumably well-located recent events. The relocations require only a small change in location for the 1954 event and a larger adjustment in the 1942 epicenter. It also appears that the 1969 earthquake may have been mislocated. The moment estimates are obtained by direct comparison of the maximum amplitudes. The moment estimates imply that the 1968 and not the 1942 earthquake is the largest to have occurred in the region this century. Previous magnitude estimates suggested the 1942 event was larger.
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Connolly, James E. "Sandbags, Strikes, and Scandals". Historical Reflections/Réflexions Historiques 42, n. 3 (1 dicembre 2016): 9–28. http://dx.doi.org/10.3167/hrrh.2016.420302.
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In spring 1915, the delicate issue of French factory workers fabricating sandbags for the German army led to various breaches of public order in occupied Roubaix. These workers were criticized and physically assaulted by their occupied compatriots. At roughly the same time, many such workers refused to continue working for the German military authority. This unrest continued for months, putting the French administration, especially the local police force, in a difficult situation: these civil servants sought to restore public order and avoid punishments for the population, but did not want to encourage working for the Germans. Scandals involving policemen further undermined this challenging task. This article examines and explains these understudied events in detail, considering the nature of public disorder, the narrative of the “sandbag affair,” and the problems faced by the police. This allows for an insight into occupied life, especially the primacy of public perception and judgment.
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A. O., Melodi A. O., e Olayinka Matthew Oyeleye. "Modeling of Lightning Strike Events, and it’s Correlational with Power Outages in South-West Coast, Nigeria". International Journal of Electrical and Computer Engineering (IJECE) 7, n. 6 (1 dicembre 2017): 3262. http://dx.doi.org/10.11591/ijece.v7i6.pp3262-3270.
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This paper aimed to model lightning strike events and evaluate its correlation with power outages in a Nigerian power distribution system. A specified coastal distribution network of southwest Nigeria was selected as a case study. Zone-specific records of cloud-to-ground lightning strikes for 84 months were obtained from the Nigerian Meteorological Agency (NiMet); records of power outage frequencies and durations for 36 months were obtained at the substations of the selected distribution network. Using numerical statistical analysis techniques, lightning activity in the system area were characterized in relative frequency terms, and correlation statistics were evaluated and analyzed for power outages and lightning events on the 11kV, 33kV, and 132kV voltage levels. An analysis of the results shows that the modelled lightning strike events patterns are closely related but the expected frequencies vary from one zone to another; and there is correlation between lightning strike and power outages in the distribution networks, which is strong and positive at the 33 kV and 132 kV circuits. In essence, the results provided salient information, useful for power systems lightning protection review, management and planning in the area.
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Osa, Maryjane. "Contention and Democracy: Labor Protest in Poland, 1989–1993". Communist and Post-Communist Studies 31, n. 1 (1 marzo 1998): 29–42. http://dx.doi.org/10.1016/s0967-067x(97)00023-8.
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This article analyzes data on labor protests in Poland during the transition period. A bivariate categorical model was used to estimate the effectiveness of different protest strategies. Analysis shows that strike threats and strikes were effective in gaining concessions from the government or employers in over eighty percent of the events in which these strategies were employed. These findings challenge prevailing notions of a weak labor movement in Poland. The implications of the study of protest for evaluating “the two faces of labor” and for democratic consolidation are explored.
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Guziy, A. G., e A. P. Kostina. "Methodological approach to the quantitative assessment of risk caused by a collision between birds and aircraft". Civil Aviation High Technologies 25, n. 5 (23 ottobre 2022): 12–24. http://dx.doi.org/10.26467/2079-0619-2022-25-5-12-24.
Testo completoAbstract (sommario):
Since 2011 worldwide, and since 2014 in Russia, a trend has revealed a steady increase in the number of aviation events caused by a collision between birds and civil aircraft. The article presents the results of the bird aircraft strike hazard (BASH) analysis in commercial aviation in Russia and proposes a methodological approach to the quantitative risk assessment caused by bird strikes. The process of the quantitative assessment of the risk level resulted from bird strikes, implemented within the framework of the UTair Aviation Safety Management System on the results of 2021, is described. The estimation of the probability is provided for aviation events of all the possible severity levels: an aircraft incident, serious accident, major accident, fatal accident. In the empirically obtained formulas for the indirect probability estimation of aircraft occurrences, the conditional probability of aviation events of greater severity was used, if events of lower severity took place, in accordance with the ratios in the previously obtained “risk pyramid” of commercial aviation in Russia. Solving the problem of quantifying the risk level contributes to increasing the assessment reliability due to the transition from a three-level risk ranking (“acceptable”, “tolerable”, “unacceptable”) to a twenty-five-level ranking and makes it possible to evaluate the effectiveness of corrective actions aimed at reducing risk by comparing the quantitively assessed level of residual risk with the original one; to optimize risk management according to the effectiveness criterion of corrective actions according to the criterion “increment in the risk level/cost”, to identify high-risk aerodromes in advance and plan unscheduled checks of ornithological aerodrome support; to develop and implement preventive corrective measures to improve ornithological support at high-risk aerodromes; to update periodically the recommendations to flight personnel in the event of a bird strike and a threat of collision (especially during takeoff and landing). The proposed methodological approach ensures the functioning of the risk management loop in the flight safety management system of any aircraft operator when performing a monthly risk analysis associated with seasonal and regional BASH in Russia.
23
Narut, Fidelis, Abdul Wahid e Sumawan Sumawan. "KARAKTERISASI PERISTIWA PETIR DI WILAYAH KOTA KUPANG SERTA KETERKAITANNYA DENGAN CURAH HUJAN". Jurnal Fisika : Fisika Sains dan Aplikasinya 3, n. 2 (17 dicembre 2018): 110–16. http://dx.doi.org/10.35508/fisa.v3i2.611.
Testo completoAbstract (sommario):
Abstrak
Telah dilakukan penelitian berkaitan dengan karakterisasi peristiwa petir diwilayah kota Kupang serta keterkaitannya dengan curah hujan. Total kejadian curah hujan untuk wilayah kota Kupang pada tahun 2013 adalah sebesar 1.956 mm, tahun 2014 sebesar 1.402 mm, tahun 2015 sebesar 1.324 mm dan tahun 2016 total curah hujannya adalah 920 mm. Dari analisis curah hujan pertahun untuk wilayah kota kupang diperoleh bahwa secara umum kota kupang memiliki tipe pola hujan monsunal. Sambaran CG tahun 2013 berjumlah 61.852 sambaran, tahun 2014 berjumlah 234.452 sambaran, tahun 2015 berjumalh 109.915 sambaran CG, tahun 2016 berjumlah 118.753 sambaran. Berdasarkan pengolahan data sebaran sambaran CG untuk wilayah Kota Kupang dari tahun 2013-2016 diperoleh bahwa wilayah yang banyak terjadi sambaran petir tiap tahunnya adalah wilayah Oebobo. Nilai korelasi (r) antara petir CG dan curah hujan pada tiap tahun diperoleh pada tahun 2013 sebesar 0,859, tahun 2014 nilai korelasi sebesar 0,787, tahun 2015 sebesar 0,914, dan pada tahun 2016 sebesar 0,809. Berdasarkan hasil uji korelasi maka dapat disimpulkan bahwa hubungan antara curah hujan dan sambaran CG di wilayah kota Kupang memiliki hubungan yang searah.
Kata kunci: petir cloud-to-ground (CG), curah hujan, korelasi
Abstract
[CHARACTERIZATION OF LIGHTNING EVENTS IN KUPANG CITY AREA AND THEIR CORRESPONDENCE WITH RAINFALL]. The research about analysis of characterization of lightning events in kupang city area and their correspondence with rainfall. The total rainfall for the city of Kupang in 2013 is 1,956 mm, 2014 by 1,402 mm, 2015 by 1,324 mm and in 2016 the total rainfall is 920 mm. From the analysis of rainfall per year for the city area Kupang obtained that in general Kupang city has a type of monsoonal rain pattern. The CG of 2013 is 61,852 strikes, 2014 of 234,452 strikes, 2015 of 109,915 CG strikes, 2016 of 118,753 strikes. Based on data processing spread of CG to Kupang City area from year 2013-2016 obtained that the area that happened many lightning strike every year is Oebobo area. Correlation value (r) between CG lightning and rainfall in each year is obtained in 2013 of 0.859, 2014 correlation value of 0.787, 2015 of 0.914, and in 2016 of 0.809. Based on the results of correlation test it can be concluded that the relationship between rainfall and CG strikes in the city of Kupang has a direct relationship.
Keywords: Cloud-to-Ground (CG) lightning, rainfall, correlation
24
Koulinka, Natalia. "A Portrait of the Worker against the Backdrop of the Soviet Union’s Collapse". East Central Europe 46, n. 1 (4 aprile 2019): 52–83. http://dx.doi.org/10.1163/18763308-04601004.
Testo completoAbstract (sommario):
The coal miners’ strikes of 1989 and 1991 in the ussr have received significant attention from scholars in the country and abroad that peaked in the 1990s. Drawing on the existing scholarship, I argue that our understanding of the strikes remains incomplete unless we consider these events in their proper discursive contexts, which were different for the two waves of strikes. I explore the All-Union daily, Izvestiia, and weekly, Literaturnaia Gazeta, as well as a Belorussian daily, Sovetskaia Belorussiia, in order to restore the discursive contexts and apply them as a tool to explain the miners’ contradictory demands. From this contextualization, the wave of 1989 strikes emerges as a proto-class struggle played out within the peculiar sociopolitical conditions of Soviet society; while the strikes of 1991 appear as a result of the classical merging of the workers’ movement with that of intellectuals and politicians, who at that time aligned themselves with neoliberal ideals.
25
Peterson, D., J. Wang, C. Ichoku e L. Remer. "Effects of lightning and other meteorological factors on fire activity in the North American boreal forest: implications for fire weather forecasting". Atmospheric Chemistry and Physics Discussions 10, n. 3 (31 marzo 2010): 8297–339. http://dx.doi.org/10.5194/acpd-10-8297-2010.
Testo completoAbstract (sommario):
Abstract. The effects of lightning and other meteorological factors on wildfire activity in the North American boreal forest were statistically analyzed during the fire seasons of 2000–2006 through an integration of the following data sets: the MODerate Resolution Imaging Spectroradiometer (MODIS) level 2 fire products, the 3-hourly 32-km gridded meteorological data from North American Regional Reanalysis (NARR), and the lightning data collected by the Canadian Lightning Detection Network (CLDN) and the Alaska Lightning Detection Network (ALDN). Positive anomalies of the 500 hPa geopotential height field, convective available potential energy (CAPE), number of cloud-to-ground lightning strikes, and the number of consecutive dry days are found to be statistically important to the seasonal variation of MODIS fire counts in a large portion of Canada and the entirety of Alaska. Analysis of fire occurrence patterns in the eastern and western boreal forest regions shows that dry lightning strikes account for only 20% of the total lightning strikes, but are associated with (and likely cause) 40% of the MODIS observed fire counts in these regions. The chance for ignition increases when a threshold of at least 10 dry strikes per NARR grid box and at least 10 consecutive dry days is reached. Due to the orientation of the large-scale synoptic pattern, complex differences in fire and lightning occurrence and variability were also found between the eastern and western sub-regions. Locations with a high percentage of dry strikes commonly experience an increased number of fire counts, but the mean number of fire counts per dry strike is more than 50% higher in western boreal forest sub-region, suggesting a geographic and possible topographic influence. While wet lightning events are found to occur with a large range of CAPE values, a high probability for dry lightning occurs only when 500 hPa geopotential heights are above ~5700 m and CAPE values are near the maximum observed level, underscoring the importance of low-level instability to boreal fire weather forecasts.
26
Peterson, D., J. Wang, C. Ichoku e L. A. Remer. "Effects of lightning and other meteorological factors on fire activity in the North American boreal forest: implications for fire weather forecasting". Atmospheric Chemistry and Physics 10, n. 14 (23 luglio 2010): 6873–88. http://dx.doi.org/10.5194/acp-10-6873-2010.
Testo completoAbstract (sommario):
Abstract. The effects of lightning and other meteorological factors on wildfire activity in the North American boreal forest are statistically analyzed during the fire seasons of 2000–2006 through an integration of the following data sets: the MODerate Resolution Imaging Spectroradiometer (MODIS) level 2 fire products, the 3-hourly 32-km gridded meteorological data from North American Regional Reanalysis (NARR), and the lightning data collected by the Canadian Lightning Detection Network (CLDN) and the Alaska Lightning Detection Network (ALDN). Positive anomalies of the 500 hPa geopotential height field, convective available potential energy (CAPE), number of cloud-to-ground lightning strikes, and the number of consecutive dry days are found to be statistically important to the seasonal variation of MODIS fire counts in a large portion of Canada and the entirety of Alaska. Analysis of fire occurrence patterns in the eastern and western boreal forest regions shows that dry (in the absence of precipitation) lightning strikes account for only 20% of the total lightning strikes, but are associated with (and likely cause) 40% of the MODIS observed fire counts in these regions. The chance for ignition increases when a threshold of at least 10 dry strikes per NARR grid box and at least 10 consecutive dry days is reached. Due to the orientation of the large-scale pattern, complex differences in fire and lightning occurrence and variability were also found between the eastern and western sub-regions. Locations with a high percentage of dry strikes commonly experience an increased number of fire counts, but the mean number of fire counts per dry strike is more than 50% higher in western boreal forest sub-region, suggesting a geographic and possible topographic influence. While wet lightning events are found to occur with a large range of CAPE values, a high probability for dry lightning occurs only when 500 hPa geopotential heights are above ~5700 m and CAPE values are near the maximum observed level, underscoring the importance of low-level instability to boreal fire weather forecasts.
27
D'Alessandro, F., e N. I. Petrov. "Field study on the interception efficiency of lightning protection systems and comparison with models". Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 462, n. 2069 (24 gennaio 2006): 1365–86. http://dx.doi.org/10.1098/rspa.2005.1625.
Testo completoAbstract (sommario):
We present and analyse the collective statistical results of a long-term field study quantifying the number of lightning strikes to buildings equipped with lightning protection systems. The observations were made over the period 1990–2003 in a region with one of the highest lightning activities in the world. The data sample comprised 86 structures with a mean height and exposure time of 57 metres and 6.9 yr, respectively. These structures were subjected to 384 flashes over the total observation time of 592 yr. The positioning of the protective air terminals on these structures was carried out with an improved electrogeometric model of lightning attachment. The collective observational data have been compared with the expected number of incident flashes using a variety of analytical relations and statistical tests. The expected strike frequency was determined with three different, contemporary models of lightning attachment to structures. The protection level or interception efficiency estimated from the models is compared with the actual value derived from the long-term field observations involving measurements of captured strikes and evidence of lightning by-pass events. The results show that the observational data used in this study are well-described by a Poisson distribution. There is a highly significant positive correlation between the observational data and the number of strikes expected from the application of the theoretical models. Finally, the observed and expected values for the mean interception efficiency of the lightning protection systems in the study are shown to be in good agreement.
28
Koller, Christian. "Local Strikes as Transnational Events: Migration, Donations, and Organizational Cooperation in the Context of Strikes in Switzerland (1860–1914)". Labour History Review 74, n. 3 (dicembre 2009): 305–18. http://dx.doi.org/10.1179/096156509x12513818419691.
Testo completo
29
Mańka-Malara, Katarzyna, e Elżbieta Mierzwińska-Nastalska. "Head Trauma Exposure in Mixed Martial Arts". International Journal of Environmental Research and Public Health 19, n. 20 (11 ottobre 2022): 13050. http://dx.doi.org/10.3390/ijerph192013050.
Testo completoAbstract (sommario):
Combat sports training involves a high risk of head injury. Previously published research on head trauma exposure in MMA evaluated only the knockouts (KO), without calculating all head strikes. The aim of the research was to evaluate the total head trauma exposure during MMA competitions among male and female fighters. Two thousand four hundred and eighty-eight MMA fights from all numbered UFC events between 2000 and 2021 were analyzed. A database containing the results from officially published scorecards with information such as the outcome of a fight, its duration, number of strikes (significant and total amount of hits) depending on location and knockdowns was created. Additional video verification of the knockout technique was carried out. The athletes received an average of 2.41 significant head strikes out of a total of 6.30 head strikes per minute. Head strikes were more common in female fights than in male. Women executed more total and significant head strikes per minute than men. Head trauma caused the ending of 31.6% of all fights—more often in male fights (32.2%) than female (23.1%). It was the most common cause of knockouts—88.1%. Professional fights in mixed martial arts involve high exposure to head trauma. A careful evaluation of the risk involved in training in such a discipline is necessary to provide adequate prevention methods.
30
Passini, Larissa B., Laísa B. Benetti e Alessander C. M. Kormann. "Pile Setup over a Period of Seven Years Based on Dynamic Load Tests in Overconsolidated Clay". Soils and Rocks 40, n. 1 (1 gennaio 2017): 17–30. http://dx.doi.org/10.28927/sr.401017.
Testo completoAbstract (sommario):
This paper presents the results of a field investigation into pile setup in overconsolidated clay soil that was conducted during a period of almost seven years, at Guabirotuba Geological Formation, south of Brazil, where the experimentation site of the Federal University of Paraná is located. One driven precast prestressed concrete pile was subjected to dynamic load tests at four different events: at the end of driving (EOD) and at three re-strikes: after 113.5 h (4.7 days), 288 h (12 days) and 2342 days (6.4 years) of pile installation. Re-strike measurements confirm that pile setup occurred and the shaft resistance component, not the end-bearing, contributes predominantly to the increase in capacity along time
31
Chapman, Herrick. "The Political Life of the Rank and File: French Aircraft Workers During the Popular Front, 1934–38". International Labor and Working-Class History 30 (1986): 13–31. http://dx.doi.org/10.1017/s0147547900016811.
Testo completoAbstract (sommario):
Between 1934 and 1938, several million workers took part in the elections, strikes, and protests that made the popular front a pivotal moment in the recent history of France. Giant street demonstrations, the General Strike of November 1938, and above all the massive sit-down strikes of June 1936 made most workers at least momentary actors in the drama of national political life. Yet, for all that has been written about these events, little is known about how labor conflict during the popular front actually affected workers' views. The problem has been in large part one of sources: the speeches, newspapers, leaflets, and memoirs of the period reveal more about trade union leaders and local militants than about the ordinary men and women who made popular protest possible but whose opinions rarely found their way into print. As a result, a number of questions remain largely unanswered: How much of the ethos of the popular front, and how much of the ideology of the Socialist and Communist parties, did rank-and-file workers come to embrace? Which slogans spoke most poignantly to lathe operators at Renault, textile workers in Lille, or sales clerks at the Galeries Lafayette? Were the euphoria of June 1936 and the crushing defeat of the General Strike in November 1938 as important in the lives of these people as they were for labor leaders? How popular, in short, was the political experience of the popular front?
32
Chapman, Herrick. "The Political Life of the Rank and File: French Aircraft Workers During the Popular Front, 1934–38". International Labor and Working-Class History 30 (1986): 13–31. http://dx.doi.org/10.1017/s0147547900003835.
Testo completoAbstract (sommario):
Between 1934 and 1938, several million workers took part in the elections, strikes, and protests that made the popular front a pivotal moment in the recent history of France. Giant street demonstrations, the General Strike of November 1938, and above all the massive sit-down strikes of June 1936 made most workers at least momentary actors in the drama of national political life. Yet, for all that has been written about these events, little is known about how labor conflict during the popular front actually affected workers' views. The problem has been in large part one of sources: the speeches, newspapers, leaflets, and memoirs of the period reveal more about trade union leaders and local militants than about the ordinary men and women who made popular protest possible but whose opinions rarely found their way into print. As a result, a number of questions remain largely unanswered: How much of the ethos of the popular front, and how much of the ideology of the Socialist and Communist parties, did rank-and-file workers come to embrace? Which slogans spoke most poignantly to lathe operators at Renault, textile workers in Lille, or sales clerks at the Galeries Lafayette? Were the euphoria of June 1936 and the crushing defeat of the General Strike in November 1938 as important in the lives of these people as they were for labor leaders? How popular, in short, was the political experience of the popular front?
33
Mohan, Preeya, e Eric Strobl. "The Economic Impact of Hurricanes in History: Evidence from Sugar Exports in the Caribbean from 1700 to 1960". Weather, Climate, and Society 5, n. 1 (1 gennaio 2013): 5–13. http://dx.doi.org/10.1175/wcas-d-12-00029.1.
Testo completoAbstract (sommario):
Abstract This study estimates the economic impact of hurricane strikes in the Caribbean from 1700 to 1960. More precisely, historical accounts of hurricane strikes and actual historical hurricane tracks, in conjunction with sugar export data taken from the colonial blue books and other historical sources, were used to create a cross-colony/country and time dataset that allows for the first time the ability to evaluate the susceptibility of local sugar production to hurricanes. The regression results show that these events had generally large statistically and economically significant impacts.
34
Niering, E. "Simulation of Bird Strikes on Turbine Engines". Journal of Engineering for Gas Turbines and Power 112, n. 4 (1 ottobre 1990): 573–78. http://dx.doi.org/10.1115/1.2906207.
Testo completoAbstract (sommario):
External components of aeroengines, such as casings and intake blades, must be capable of withstanding bird strikes. Various methods of computer simulation that have been developed are presented in summary. The most accurate and meaningful results are obtained with finite element programs specifically developed for impact events. Bird and component are divided into finite elements. The component model must allow for great elastic-plastic deformation, where the yield strength is a function of the strain rate. A model shape and a homogeneous substitute material must be defined for the complicated and nonhomogeneous structure of the bird. Bird strikes on a rotating spinner and an intake blade are investigated with the finite element program DYNA3D.
35
Xie, Chao, Bengang Zhou, Fan Yang, Zhengfang Li, Yueju Cui, Wei Pang e Wei Li. "Geological and Geomorphological Evidence for Activity along the Motuo Fault, Eastern Side of the Namche Barwa Syntaxis, Tibetan Plateau". Seismological Research Letters 92, n. 4 (3 marzo 2021): 2196–205. http://dx.doi.org/10.1785/0220200342.
Testo completoAbstract (sommario):
Abstract The Motuo fault (MTF) strikes along the Yarlung Zangbo suture zone on the eastern boundary of the Namche Barwa syntaxis. The movement pattern and Quaternary activity of the MTF remain unclear, which hampers efforts to undertake meaningful seismic hazard assessments near the southeastern part of the Tibetan plateau and to understand the tectonic evolution of the Namche Barwa syntaxis. In this study, the MTF is shown to feature left-lateral strike-slip movements with offset gullies and mountain ridges and appears to have ruptured during the late Pleistocene to Holocene, as evidenced from geological, paleoseismic, and radiocarbon dating investigations. Specifically, at least three surface-rupturing paleoseismic events are revealed; two events occurred after 2606 B.P. and after 18.2 ka. Combining this information with previous Global Positioning System results in southeastern Tibet, we suggest that, as a boundary fault, the MTF regulates the movements of the Namche Barwa and Chayu blocks. The velocity difference between the two blocks advancing to the north is the main mechanism of left-lateral strike-slip motion along the MTF. The accumulation and release of shear stress between the two blocks have led to strong activity along the MTF, since the late Quaternary.
36
Balicki, Włodzimierz, Paweł Glowacki e Leszek Loroch. "Birds Strike – Impact on the Safety of Civil Aircraft Operations in Poland in 2008–2018". Acta Mechanica et Automatica 15, n. 2 (1 giugno 2021): 100–106. http://dx.doi.org/10.2478/ama-2021-0014.
Testo completoAbstract (sommario):
Abstract The authors assessed the real threat to civil aircraft traffic in Poland resulting from bird strikes. It was found that in the period 2013–2018, the probability of such events increased by four times. Data for this work were downloaded from the ECCAIRS database maintained by the Civil Aviation Authority. Air traffic events have been collected for several years in this database. An assessment of the energy of bird collision with the aircraft, resulting from the bird’s mass and relative speed of movement, was also presented. Ways to minimise the risk of collision were described by introducing crew warning systems and means to scare off birds from the airport grounds. The method of testing the resistance of turbine engines to the foreign body’s absorption was also shown, as well as design methods for increasing the engine resistance to bird strikes.
37
Miller, Graham, e Brent W. Ritchie. "When disaster strikes: the effect of relying on events for rural economies". Journal of Sport & Tourism 7, n. 3 (gennaio 2002): 15–16. http://dx.doi.org/10.1080/10295390208718724.
Testo completo
38
Granger, Dale. "The Empire Strikes Back with Spectacular Results in the Beetaloo". PESA News, n. 164 (23 marzo 2022): 22–26. http://dx.doi.org/10.36404/aglz3960.
Testo completo
39
Basrin, Riski, Hadi Imam Sutaji, Apolinaris S. Geru e Jehunias L. Tanesib. "KARAKTERISTIK PERISTIWA PETIR TERKAIT CURAH HUJAN DI WILAYAH MAUMERE NUSA TENGGARA TIMUR". Jurnal Fisika : Fisika Sains dan Aplikasinya 6, n. 2 (29 ottobre 2021): 75–83. http://dx.doi.org/10.35508/fisa.v6i2.6836.
Testo completoAbstract (sommario):
Abstrak
Telah dilakukan penelitian tentang karakteristik peristiwa petir, khususnya jenis Cloud to Gground (CG) terkait curah hujan (CH) di wilayah Nusa Tenggara Timur (NTT). Hasil penelitian menunjukkan bahwa total sambaran petir CG yang terjadi di wilayah Maumere pada periode bulan Desember 2014 sampai November 2019 sebesar 18.194 sambaran dengan sambaran maksimum terjadi pada bulan Nopember sampai April dan sambaran minimum terjadi di bulan Juli sampai Oktober. Untuk curah hujan yang terjadi pada daerah Maumere dan periode tersebut sebesar 4.201 mm dengan pola hujan bertipe monsunal, dimana curah hujan maksimum terjadi di bulan Desember sampai Februari, sedangkan curah hujan minimum terjadi pada bulan Juli sampai Oktober. Peristiwa sambaran petir CG dan curah hujan di wilayah tersebut, umumnya memiliki hubungan yang tidak searah atau tidak kuat namun tergolong pada korelasi sedang. Selain itu, jumlah peristiwa sambaran petir untuk jumlah curah hujan pada setiap tahunnya berbeda yang ditunjukkan dengan nilai perhitungan Rain-Yield per Flash (RPF). Hal ini diduga karena adanya beberapa faktor, seperti perubahan cuaca yang begitu cepat, pergerakan angin yang kencang serta adanya faktor lama penyinaran matahari yang terjadi di wilayah tersebut.
Abstract
Research on the characteristics of lightning events has been carried out, especially the type of cloud to ground (CG) related to rainfall (CH) in the East Nusa Tenggara (NTT) region. The result showed that the total CG lightning strikes that occurred in the Maumere area in the period December 2014 to November 2019 were 18.194 strikes with the maximum strikes occurring from November to April and the minimum incidents occurring from July to October. The rainfall that occurs in these Maumere regions and periods is 4.201 mm with a monsoon-type rain pattern, where the maximum rainfall occurs in December to February, while the minimum rainfall occurs from July to October. The CG lightning strikes events and rainfall in the area, generally have a unidirectional or not strong relationship but are classified as moderate correlation. Also In addition, the number of lightning strikes events for the amount of rainfall in each year is different as indicated by the Rain-Yield per Flash (RPF) calculation value. This is presumably due to several factors, such as rapid weather changes, strong wind movements, and the long time factor of sun exposure in the area.
40
Ebrey, Rhian, Stephen Hall e Rebecca Willis. "Is Twitter Indicating a Change in MP’s Views on Climate Change?" Sustainability 12, n. 24 (10 dicembre 2020): 10334. http://dx.doi.org/10.3390/su122410334.
Testo completoAbstract (sommario):
Following the release of the Intergovernmental Panel on Climate Change (IPCC) 1.5 °C Special Report in October 2018, there has been a surge in public concern about climate change and demands for greater government action. We analyse the discourse of Members of Parliament (MPs) on climate change on Twitter to examine the extent to which these recent public climate-related events have influenced political agenda-setting. We argue that these events have had two, linked, effects: increased political discourse on climate change, and an increasing use of ‘urgent’ climate language. However, the language style used between political parties differs. Additionally, while the youth strikes and Greta Thunberg, who initiated these strikes, appear to have the greatest influence on MPs’ discourse, the overall relative impact is low, with responses predominately from left- and centrist-political parties. This indicates a clear difference between parties. However, Twitter may not be a suitable platform for investigating Conservative discourse. Further work to explore agenda-setting on Conservative policymaking is required.
41
Pritchard, David. "Protest Events, Welfare Generosity, and Welfare State Regimes". Contention 7, n. 2 (1 dicembre 2019): 31–50. http://dx.doi.org/10.3167/cont.2019.070203.
Testo completoAbstract (sommario):
This article examines data from the Cross-National Time-Series Data Archive and the Comparative Welfare Entitlements Dataset on protest events, levels of welfare generosity (the extent to which welfare protection is provided by non-market actors), and welfare state regimes in 18 advanced industrialized countries across the period 1971–2002. Using a direct measure of protest events in terms of frequency of riots, demonstrations, general strikes, political assassinations, and attempted revolutions, the article finds that there is a significant relationship between welfare generosity, welfare state regimes, and protest events. The findings demonstrate that more extensive welfare arrangements—conceptualized through the use of empirical data—not only ameliorate social disadvantages and thus legitimate market economies and capital accumulation, but also bring about stability and social order.
42
Islam, Md Saidul, e Si Hui Lim. "When “Nature” Strikes: A Sociology of Climate Change and Disaster Vulnerabilities in Asia". Nature and Culture 10, n. 1 (1 marzo 2015): 57–80. http://dx.doi.org/10.3167/nc.2015.100104.
Testo completoAbstract (sommario):
Home to 60 percent of the world's population, Asia accounts for 85 percent of those killed and affected globally by disaster events in 2011. Using an integrated sociological framework comprised of the pressure and release (PAR) model and the double-risk society hypothesis, and drawing on data obtained from the Emergency Events Database (EM-DAT), PreventionWeb, and the IPCC special report on extreme events, this article offers a sociological understanding of disaster development and recovery in Asia. The particular focus is on seven Asian countries, namely, China, India, Indonesia, Japan, Thailand, Taiwan, and Vietnam. Rather than treating disasters entirely as “natural” events caused by “violent forces of nature”, we emphasize various ways in which social systems create disaster vulnerability. We argue that existing disaster mitigation and adaptation strategies in Asia that focus almost entirely on the natural and technological aspects of hazards have serious limitations, as they ignore the root causes of disaster vulnerabilities, such as limited access to power and resources. This article therefore recommends a holistic approach to disaster management and mitigation that takes into consideration the various larger social, political, and economic conditions and contexts.
43
Kurowska, Katarzyna. "Współczesne reprezentacje rewolucyjnych wydarzeń historii najnowszej Europy Środkowo-Wschodniej w grach planszowych". Studia Interkulturowe Europy Środkowo-Wschodniej 12 (15 novembre 2019): 79–97. http://dx.doi.org/10.5604/01.3001.0013.5615.
Testo completoAbstract (sommario):
The aim of the article is to look at what and how important for the contemporary history of Central Europe events were presented in popular culture, which is represented here by board games. They are subjected to analysis six historical games created primarily in Poland, although one title comes from Czechoslovakia, which in various ways tell about selected events from the communist period, including about the papal pilgrimage, strikes and martial law.
44
Wood, Geoffrey. "The 1973 Durban strikes: Of local and international significance". New Contree 31 (30 giugno 1992): 6. http://dx.doi.org/10.4102/nc.v31i0.599.
Testo completoAbstract (sommario):
The 1973 Durban strike wave was for most people a totally unexpected event. With more than 60 000 black workers involved, it was a major cause for concern among the company owners, state officials and the public. This article evaluates the 1973 Durban strike wave and the events leading up to it. It is argued that the strike wave was the result of a combination of factors, ranging from increased inflationary pressures to a complex chain of political developments. The strike wave should be viewed in the context of the emergence of the black trade union movement and of increased socio-political conflict.
45
Keitoue, Samir, Ivan Murat, Božidar Filipović-Grčić, Alan Župan, Ivana Damjanović e Ivica Pavić. "Lightning caused overvoltages on power transformers recorded by on-line transient overvoltage monitoring system". Journal of Energy - Energija 67, n. 2 (2 giugno 2022): 44–53. http://dx.doi.org/10.37798/201867279.
Testo completoAbstract (sommario):
Transient overvoltages generated by lightning strikes or switching operations represent a significant risk to bushings and windings of power transformers. They cause stress on the insulation system and can, over time, cause dielectric failure and damage to power transformers. Many transformer failures are reported as dielectric failures and they are not necessarily linked to any particular event when they occur but may be the result of prior damage from transient overvoltage events. Lightning and switching overvoltage waveforms appearing at transformer terminals in real operating conditions may significantly differ from standard impulse voltage waveforms used during laboratory testing. The number and amplitudes of overvoltages which stress the insulation depend on various parameters such as the lightning strike density in the considered area, since it determines how often the transformer is stressed by lightning overvoltages. Since the overvoltage amplitudes at transformer terminals are usually unknown, an on-line overvoltage transient recorder can be used with the ability to sample, analyse and store transients in real-time. In this paper, an on-line transient overvoltage monitoring system (TOMS) for power transformers is presented that is capable to continuously record in real-time various kinds of transient overvoltages such as lightning or switching overvoltages. Special attention is paid to lightning caused transient overvoltages recorded at the terminals of 150 MVA power transformer. Recorded waveforms originating from lightning strikes to overhead lines are correlated with data from the lightning location system (LLS) and supervisory control and data acquisition (SCADA) system. Collected data about overvoltage stresses can be used as the basis for the assessment of the transformer insulation condition, estimation of health index and for analysis of various kinds of events such as faults or equipment failures.
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BLACK, ANDY. "Light induced seabird mortality on vessels operating in the Southern Ocean: incidents and mitigation measures". Antarctic Science 17, n. 1 (28 febbraio 2005): 67–68. http://dx.doi.org/10.1017/s0954102005002439.
Testo completoAbstract (sommario):
It is recognized that birds become disorientated at night in the presence of artificial light (Bruderer et al. 1999). Bird strikes on vessels operating in the southern oceans have long been known (Ryan 1991), but few data have been published concerning these events. In the Southern Ocean the Convention for the Conservation of Antarctic Marine Living Resources (CCAMLR) stipulates that, during fishing operations, deck lighting should be kept to a minimum and be directed inboard and downward (CCAMLR 2003, measures 25-02 and 25-03). However, these measures are designed to keep birds away from fishing gear rather than prevent bird strikes. The problem of bird strikes has been recognized by several territories within the southern oceans and policies to reduce the risk of them occurring are included in several management plans (Ryan & Glass 2001, policy 5.14 and Meere 2002, section 28:1f–1g). These do not, however, address the issue of ice-lights (powerful searchlights used to discern floating ice that might go undetected by radar), which are regarded as essential navigational aids.
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Legay, Richard. "The Role of Commercial Radio Stations in the Media Vacuum of Mai 68 in Paris". VIEW Journal of European Television History and Culture 6, n. 12 (1 maggio 2017): 1. http://dx.doi.org/10.18146/2213-0969.2017.jethc136.
Testo completoAbstract (sommario):
Commercial radio stations RTL and Europe n°1 played an important role during the events of May 1968 in Paris by maintaining the news coverage of the protests, the riots and the strikes. By analyzing the entanglements of the various audiovisual media and surviving audio material,this article defends the idea that a vacuum created by the crisis that affected the French public broadcasting agency is one of the main reasons that brought the commercial radio stations at the centre of the events.
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Madabhushi, Sriram, e Pradeep Talwani. "Fault plane solutions and relocations of recent earthquakes in Middleton Place Summerville Seismic Zone near Charleston, South Carolina". Bulletin of the Seismological Society of America 83, n. 5 (1 ottobre 1993): 1442–66. http://dx.doi.org/10.1785/bssa0830051442.
Testo completoAbstract (sommario):
Abstract The Middleton Place Summerville Seismic Zone (MPSSZ), located about 20 km northwest of Charleston is the most active seismic zone in South Carolina. Between 1980 and 1991, 58 events with Md 0.8 to 3.3 were recorded in MPSSZ. They lie in a diffuse area of 11 km by 14 km of which over two-thirds are located in a narrow 5 km by 6-km zone. The hypocentral depths range from 2 to 11 km with over 90% deeper than 4 km. Single fault plane solutions were obtained for 35 events. Based on the focal mechanisms the earthquakes were grouped into five subsets. The mean P-axis of all fault plane solutions is oriented N63°E, in general agreement with the direction of SHmax obtained from in situ stress measurements. Of the 35 events, 18 are associated with reverse faulting on NW - SE striking and SW dipping fault planes. These events were inferred to be associated with the Ashley River fault zone, which is not a planar feature, but is composed of short segments of varying strikes (N20°W to N70°W) and dips (40° to 70°SW). Eleven events were associated with strike-slip motion on NNE - SSW striking vertical faults and with thrust faulting on N - S oriented faults dipping to the west, respectively. These two sets are identified as being parts of the Woodstock fault zone. The concentrated zone of seismicity included events associated with both the ARF and WF zones suggesting that it is at the intersection of these two fault zones.
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Meyburg, Bernd-Ulrich, Tadeusz Mizera, Christiane Meyburg e Michael Mcgrady. "Collision between a migrating lesser spotted eagle (Clanga pomarina) and an aircraft as detailed by fine-scale GSM-GPS telemetry data". Slovak Raptor Journal 12, n. 1 (1 dicembre 2018): 55–62. http://dx.doi.org/10.2478/srj-2018-0001.
Testo completoAbstract (sommario):
Abstract We tracked a breeding adult female lesser spotted eagle (Clanga pomarina) from Germany using GPS technology, and provide details of her collision with a small aircraft at Rzeszów (SE Poland) during April 2016, when she was migrating towards her breeding territory. The ultimate fate of the bird was not established until the tag was found by chance and the data were recovered. Bird strikes are a global problem with sometimes lethal consequences for animals and people. This account highlights the way technology allows us to closely monitor events during bird migration, and document human-raptor interactions. The collision illustrates how food availability might affect bird-strike risk, and indicates that removing animal carcasses from the vicinity of airports could reduce that risk. We discuss the data in relation to risks faced by lesser spotted eagles (and other soaring birds) of collision with aircraft, especially along flyways during migration seasons.
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Mah, D. Y. S., N. C. Nam, F. J. Putuhena e P. L. Law. "Modelling of Batang Rejang for Extreme Events". Journal of Civil Engineering, Science and Technology 4, n. 3 (1 dicembre 2013): 1–5. http://dx.doi.org/10.33736/jcest.119.2013.
Testo completoAbstract (sommario):
Flood is a natural hazard. It happens when the water in a river channel is beyond the capacity of the channel to carry while the overflowing water is called as floodwater. Flood causes damage to life and property when it strikes a vulnerable population in the affected area. There are several townships located along Batang Rejang such as Kapit, Song, Kanowit and Sibu. The main objective of this paper is to develop a river model to map the extreme events for Batang Rejang. The method used in is river modelling by using InfoWorks RS software. This method is simulating the Batang Rejang in order to view the behaviours of the river in response to conditions and effects of extreme events over a given period of time. Flood maps computed from InfoWorks RS are for flood extent analysis as it provides insights to the damage for different locations at different flows. The maps are also useful for related authorities or parties to locate human activities at the catchment area and to carry out emergency flood plans in the future.