10 research outputs found
Експерименти по випромінюванню коротких імпульсних сигналів антенами великого струму Х.Ф. Хармута
No full textThe report contains some designs and characteristics of studied by the author large current radiators (LCR) of Dr. H.F. Harmuth for radiation of pulse signals of the nanosecond duration range.Статья содержит описание ряда конструкций и характеристики антенн большого тока Хармута, предназначенных для излучения коротких импульсных сигналов наносекундного диапазона длительностей.Стаття вміщує опис конструкцій і характеристики антен великого струму Хармута, призначених для випромінювання коротких імпульсних сигналів наносекундного діапазону тривалостей.This work is supported by Professor of Catholic University of America Henning F. Harmuth
Експерименти по випромінюванню коротких імпульсних сигналів антенами великого струму Х.Ф. Хармута
No full textThe report contains some designs and characteristics of studied by the author large current radiators (LCR) of Dr. H.F. Harmuth for radiation of pulse signals of the nanosecond duration range.Статья содержит описание ряда конструкций и характеристики антенн большого тока Хармута, предназначенных для излучения коротких импульсных сигналов наносекундного диапазона длительностей.Стаття вміщує опис конструкцій і характеристики антен великого струму Хармута, призначених для випромінювання коротких імпульсних сигналів наносекундного діапазону тривалостей.This work is supported by Professor of Catholic University of America Henning F. Harmuth
The Fireproof Building: Technology and Public Safety in the Nineteenth-Century City. By Sara Wermiel. Baltimore: Johns Hopkins University Press, 2000. Pp. viii, 301. $45.00.
No full textSara Wermiel s carefully crafted and informative The Fireproof Building explores the evolution of structural fire protection in the United States from its origins in the late eighteenth century through the nineteenth century with special emphasis on its role in the development of skyscrapers. Without the specialized technological developments described by the author, large public buildings, which are the centerpieces of most contemporary cities, would be impossible. Although many scholars have examined the engineering of tall buildings and their historic conquest of height in the modern city, Wermeil provides a compelling argument for the broad significance of fire-resistant methods in the development of the twentieth-century urban landscape.
A large deviations bound for the Teichmüller flow on the moduli space of abelian differentials
No full textAbstractLarge deviation rates are obtained for suspension flows over symbolic dynamical systems with a countable alphabet. We use a method employed previously by the first author [Large deviations bound for semiflows over a non-uniformly expanding base.Bull. Braz. Math. Soc. (N.S.)38(3) (2007), 335–376], which follows that of Young [Some large deviation results for dynamical systems.Trans. Amer. Math. Soc.318(2) (1990), 525–543]. As a corollary of the main results, we obtain a large deviation bound for the Teichmüller flow on the moduli space of abelian differentials, extending earlier work of Athreya [Quantitative recurrence and large deviations for Teichmuller geodesic flow.Geom. Dedicata119(2006), 121–140].</jats:p
The determinants of voluntary judicial resignation in Australia, Canada, and New Zealand
No full textThis article compares supreme and high court judicial turnover with respect to voluntary exits and retirements in three Westminster parliamentary democracies, Australia, Canada, and New Zealand, for the period 1970-2012. The findings of an event history model indicate that judges who author large numbers of opinions in a given year are likely to stay longer, while those who dissent from their colleagues frequently are more likely to exit early. It was also found that judges are more likely to resign if the party that appointed them was expected to lose government
Actor-oriented societal indicators of man-made eutrophication of marine environments
No full textNo abstracts are to be cited without prior reference to the author. Large-scale eutrophication of marine environments is a severe problem that is strongly linked to general trends in the society and the behaviour of a multitude of actors. Producers and consumers of goods, supply chain managers, importers and retailers, public procurers and environmental managers in different types of organisations all make decisions that can lead to increased or decreased inputs of nutrients to the sea. This calls for programmes of measures based on reliable knowledge of how a great variety of societal behaviours and actions are linked to the pressure on marine environment. Here, we present a systematic procedure to identify relevant actors and behaviours and synthesize them into indicators that we refer to as societal indicators. First, we examine how material flows caused by production, transportation, distribution, consumption and the end-of-life of goods result in nutrient inputs to marine environments. Then we identify actors and behaviours that directly or indirectly influence such flows. Based on such knowledge about actors and their behaviour and the results of case studies in Sweden, we propose different groups of potentially useful societal indicators. Further work is needed to address the salience, credibility and legitimacy of the indicators to underpin future us
A balanced harvesting strategy to counteract the effect on fisheries yields of reduced body size of organisms in the future ocean
No full textNo abstracts are to be cited without prior reference to the author. Large bodied individuals suffer disproportional from human activities because they tend to have smaller population sizes, longer turnover rates, and hence longer recovery times, consequently they are more prone to extinction. Of special interest are those changes in the biogeochemical carbon cycle that can potentially alter the metabolic balance of ecosystems, which determines whether an ecosystem acts as a source or sink for atmospheric carbon dioxide. Using the EcoTroph model, and from information of trophic spectrum from different types of ecosystems (e.g. pelagic, demersal, benthic-demersal), the effect of fishing was simulated considering two scenarios, one where the abundance and size structure of the community were the same described in actualized literature, and a second scenario where an increase and a reduction in the amount of smaller and bigger individuals, respectively, was considered, in order to simulate the effect on fisheries and metabolic balance, of reduced body size of organisms in the future ocean and a balanced harvesting fisheries management strategy. A synergistic effect between fisheries and reduced mean body size of a community is noted. Applying a balanced harvest strategy increases the capacity of ecosystems to sequester carbon compared to traditional management strategies
Attack counts
No full textReadMe details for “Bolnick_data.csv” for Bolnick et al. Biology Letters 2016
The file Bolnick_data.csv is a comma-delimited ..csv text file. This file contains columns necessary to recreate analyses presented in the Biology Letters paper. The data in this table is a synthesis of a raw data file containing the exact time of each interaction, obtained from the original videos that are available upon request from the author (large files).
Each column is distinct information regarding individual fish (rows). These columns are:
A) Lake: Blackwater Lake or Gosling Lake
B) Fish: an ID number corresponding to the camera used to uniquely video tape each interaction
C) Model_color: Red, Blue, or Control_object (a cylinder the same size as our models)
D) depth: Resident males’ nest depth (cm)
E) N_bites: Number of bites directed at the model over a 1 hour video
F) N_inspects: Number of inspections of the model (focal fish approaching the model to within one body length while facing the model)
G) Aggressive_interactions: Sum of bites and inspections
H) Date: date of experiment
I) Mean.interval.between.bites: the mean duration of time between successive bites. Not calculated for Blackwater Lake because too few fish conducted more than 2 bites. Measured in seconds.
J) Median.interval.between.bites: the median duration of time between successive bites. Not calculated for Blackwater Lake because too few fish conducted more than 2 bites. Measured in seconds.
K) SD.interval: the standard deviation of the duration of time between successive bites. Not calculated for Blackwater Lake because too few fish conducted more than 2 bites. Measured in seconds
Data from: Intruder colour and light environment jointly determine how nesting male stickleback respond to simulated territorial intrusions
No full textAbstractVariation in male nuptial colour signals might be maintained by negative frequency-dependent selection. This can occur if males are more aggressive towards rivals with locally common colour phenotypes. To test this hypothesis, we introduced red or melanic three-dimensional printed-model males into the territories of nesting male stickleback from two optically distinct lakes with different coloured residents. Red-throated models were attacked more in the population with red males, while melanic models were attacked more in the melanic male lake. Aggression against red versus melanic models also varied across a depth gradient within each lake, implying that the local light environment also modulated the strength of negative frequency dependence acting on male nuptial colour.Usage notesAttack countsReadMe details for “Bolnick_data.csv” for Bolnick et al. Biology Letters 2016
The file Bolnick_data.csv is a comma-delimited ..csv text file. This file contains columns necessary to recreate analyses presented in the Biology Letters paper. The data in this table is a synthesis of a raw data file containing the exact time of each interaction, obtained from the original videos that are available upon request from the author (large files).
Each column is distinct information regarding individual fish (rows). These columns are:
A) Lake: Blackwater Lake or Gosling Lake
B) Fish: an ID number corresponding to the camera used to uniquely video tape each interaction
C) Model_color: Red, Blue, or Control_object (a cylinder the same size as our models)
D) depth: Resident males’ nest depth (cm)
E) N_bites: Number of bites directed at the model over a 1 hour video
F) N_inspects: Number of inspections of the model (focal fish approaching the model to within one body length while facing the model)
G) Aggressive_interactions: Sum of bites and inspections
H) Date: date of experiment
I) Mean.interval.between.bites: the mean duration of time between successive bites. Not calculated for Blackwater Lake because too few fish conducted more than 2 bites. Measured in seconds.
J) Median.interval.between.bites: the median duration of time between successive bites. Not calculated for Blackwater Lake because too few fish conducted more than 2 bites. Measured in seconds.
K) SD.interval: the standard deviation of the duration of time between successive bites. Not calculated for Blackwater Lake because too few fish conducted more than 2 bites. Measured in seconds.Bolnick_data.csv</div
