32 results on '"Ens B"'
Search Results
2. GPS-zenders bron voor biodiversiteitsonderzoek
- Author
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Kolk, H.J. van der, Desmet, P., Davidson, S., Ens, B., Jongejans, E., Kolk, H.J. van der, Desmet, P., Davidson, S., Ens, B., and Jongejans, E.
- Abstract
Wereldwijd zijn tienduizenden dieren met GPS-zenders uitgerust. Onderzoekers gebruiken de gegevens om diergedrag te bestuderen, of om soorten te beschermen. Ook vertellen de zenders veel over de verspreiding van soorten. Een onderzoeksteam heeft nu de vertaalslag gemaakt die het eindelijk mogelijk maakt om GPS- gegevens in te zetten voor biodiversiteitsonderzoek.
- Published
- 2023
3. Causes of spatiotemporal variation in reproductive performance of Eurasian oystercatchers in a human-dominated landscape
- Author
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de Kroon, J.C.J.M., Ens, B. J., Jongejans, E., van de Pol, M., Frauendorf, M., de Kroon, J.C.J.M., Ens, B. J., Jongejans, E., van de Pol, M., and Frauendorf, M.
- Abstract
Radboud University, 14 september 2022, Promotor : de Kroon, J.C.J.M. Co-promotores : Ens, B. J., Jongejans, E., van de Pol, M., Contains fulltext : 252642.pdf (Publisher’s version ) (Open Access)
- Published
- 2022
4. The ecosystem of health decision making: from fragmentation to synergy
- Author
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Schünemann H.J., Reinap M., Piggott T., Laidmäe E., Köhler K., Pold M., Ens B., Irs A., Akl E.A., Cuello C.A., Falavigna M., Gibbens M., Neamtiu L., Parmelli E., Jameleddine M., Pyke L., Verstijnen I., Alonso-Coello P., Tugwell P., Zhang Y., Saz-Parkinson Z., Kuchenmüller T., and Moja L.
- Subjects
ecosystem ,Technology Assessment, Biomedical ,adult ,practice guideline ,Decision Making ,review ,Administrative Personnel ,female ,male ,systematic review ,biomedical technology assessment ,Humans ,human ,quality control ,ecosystem health ,manager - Abstract
Clinicians, patients, policy makers, funders, programme managers, regulators, and science communities invest considerable amounts of time and energy in influencing or making decisions at various levels, using systematic reviews, health technology assessments, guideline recommendations, coverage decisions, selection of essential medicines and diagnostics, quality assurance and improvement schemes, and policy and evidence briefs. The criteria and methods that these actors use in their work differ (eg, the role economic analysis has in decision making), but these methods frequently overlap and exist together. Under the aegis of WHO, we have brought together representatives of different areas to reconcile how the evidence that influences decisions is used across multiple health system decision levels. We describe the overlap and differences in decision-making criteria between different actors in the health sector to provide bridging opportunities through a unifying broad framework that we call theory of everything. Although decision-making activities respond to system needs, processes are often poorly coordinated, both globally and on a country level. A decision made in isolation from other decisions on the same topic could cause misleading, unnecessary, or conflicted inputs to the health system and, therefore, confusion and resource waste. © 2022 World Health Organization
- Published
- 2022
5. Effects of ${}^{89}{\rm Sr}$ on the Production and Maturation of Small Lymphocytes Bearing Surface Immunoglobulin, Fc, and Complement Receptors in Mice
- Author
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Chan, F. P. H. and Ens, B. E.
- Published
- 1984
- Full Text
- View/download PDF
6. Interference Among Oystercatchers, Haematopus ostralegus, Feeding on Mussels, Mytilus edulis, on the Exe Estuary
- Author
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Ens, B. J. and Goss-Custard, J. D.
- Published
- 1984
- Full Text
- View/download PDF
7. Why Does the Typically Monogamous Oystercatcher (Haematopus ostralegus) Engage in Extra-Pair Copulations?
- Author
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Ens, B. J., Burke, T., and Kruijt, J. P.
- Published
- 1993
8. Population Consequences of Winter Habitat Loss in a Migratory Shorebird. I. Estimating Model Parameters
- Author
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Goss-Custard, J. D., Clarke, R. T., Briggs, K. B., Ens, B. J., Smit, C., Beintema, A. J., Caldow, R. W. G., Catt, D. C., Clark, N. A., Harris, M. P., Hulscher, J. B., Meininger, P. L., Picozzi, N., Prys-Jones, R., Safriel, U. N., and West, A. D.
- Published
- 1995
- Full Text
- View/download PDF
9. Population Consequences of Winter Habitat Loss in a Migratory Shorebird. II. Model Predictions
- Author
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Goss-Custard, J. D., Clarke, R. T., Caldow, R. W. G., and Ens, B. J.
- Published
- 1995
- Full Text
- View/download PDF
10. Meta-analysis of multidecadal biodiversity trends in Europe
- Author
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Pilotto, F. (Francesca), Kuehn, I. (Ingolf), Adrian, R. (Rita), Alber, R. (Renate), Alignier, A. (Audrey), Andrews, C. (Christopher), Baeck, J. (Jaana), Barbaro, L. (Luc), Beaumont, D. (Deborah), Beenaerts, N. (Natalie), Benham, S. (Sue), Boukal, D. S. (David S.), Bretagnolle, V. (Vincent), Camatti, E. (Elisa), Canullo, R. (Roberto), Cardoso, P. G. (Patricia G.), Ens, B. J. (Bruno J.), Everaert, G. (Gert), Evtimova, V. (Vesela), Feuchtmayr, H. (Heidrun), Garcia-Gonzalez, R. (Ricardo), Gomez Garcia, D. (Daniel), Grandin, U. (Ulf), Gutowski, J. M. (Jerzy M.), Hadar, L. (Liat), Halada, L. (Lubos), Halassy, M. (Melinda), Hummel, H. (Herman), Huttunen, K.-L. (Kaisa-Leena), Jaroszewicz, B. (Bogdan), Jensen, T. C. (Thomas C.), Kalivoda, H. (Henrik), Schmidt, I. K. (Inger Kappel), Kroencke, I. (Ingrid), Leinonen, R. (Reima), Martinho, F. (Filipe), Meesenburg, H. (Henning), Meyer, J. (Julia), Minerbi, S. (Stefano), Monteith, D. (Don), Nikolov, B. P. (Boris P.), Oro, D. (Daniel), Ozolins, D. (Davis), Padedda, B. M. (Bachisio M.), Pallett, D. (Denise), Pansera, M. (Marco), Pardal, M. A. (Miguel Angelo), Petriccione, B. (Bruno), Pipan, T. (Tanja), Poeyry, J. (Juha), Schaefer, S. M. (Stefanie M.), Schaub, M. (Marcus), Schneider, S. C. (Susanne C.), Skuja, A. (Agnija), Soetaert, K. (Karline), Springe, G. (Gunta), Stanchev, R. (Radoslav), Stockan, J. A. (Jenni A.), Stoll, S. (Stefan), Sundqvist, L. (Lisa), Thimonier, A. (Anne), Van Hoey, G. (Gert), Van Ryckegem, G. (Gunther), Visser, M. E. (Marcel E.), Vorhauser, S. (Samuel), Haase, P. (Peter), Pilotto, F. (Francesca), Kuehn, I. (Ingolf), Adrian, R. (Rita), Alber, R. (Renate), Alignier, A. (Audrey), Andrews, C. (Christopher), Baeck, J. (Jaana), Barbaro, L. (Luc), Beaumont, D. (Deborah), Beenaerts, N. (Natalie), Benham, S. (Sue), Boukal, D. S. (David S.), Bretagnolle, V. (Vincent), Camatti, E. (Elisa), Canullo, R. (Roberto), Cardoso, P. G. (Patricia G.), Ens, B. J. (Bruno J.), Everaert, G. (Gert), Evtimova, V. (Vesela), Feuchtmayr, H. (Heidrun), Garcia-Gonzalez, R. (Ricardo), Gomez Garcia, D. (Daniel), Grandin, U. (Ulf), Gutowski, J. M. (Jerzy M.), Hadar, L. (Liat), Halada, L. (Lubos), Halassy, M. (Melinda), Hummel, H. (Herman), Huttunen, K.-L. (Kaisa-Leena), Jaroszewicz, B. (Bogdan), Jensen, T. C. (Thomas C.), Kalivoda, H. (Henrik), Schmidt, I. K. (Inger Kappel), Kroencke, I. (Ingrid), Leinonen, R. (Reima), Martinho, F. (Filipe), Meesenburg, H. (Henning), Meyer, J. (Julia), Minerbi, S. (Stefano), Monteith, D. (Don), Nikolov, B. P. (Boris P.), Oro, D. (Daniel), Ozolins, D. (Davis), Padedda, B. M. (Bachisio M.), Pallett, D. (Denise), Pansera, M. (Marco), Pardal, M. A. (Miguel Angelo), Petriccione, B. (Bruno), Pipan, T. (Tanja), Poeyry, J. (Juha), Schaefer, S. M. (Stefanie M.), Schaub, M. (Marcus), Schneider, S. C. (Susanne C.), Skuja, A. (Agnija), Soetaert, K. (Karline), Springe, G. (Gunta), Stanchev, R. (Radoslav), Stockan, J. A. (Jenni A.), Stoll, S. (Stefan), Sundqvist, L. (Lisa), Thimonier, A. (Anne), Van Hoey, G. (Gert), Van Ryckegem, G. (Gunther), Visser, M. E. (Marcel E.), Vorhauser, S. (Samuel), and Haase, P. (Peter)
- Abstract
Local biodiversity trends over time are likely to be decoupled from global trends, as local processes may compensate or counteract global change. We analyze 161 long-term biological time series (15–91 years) collected across Europe, using a comprehensive dataset comprising ~6,200 marine, freshwater and terrestrial taxa. We test whether (i) local long-term biodiversity trends are consistent among biogeoregions, realms and taxonomic groups, and (ii) changes in biodiversity correlate with regional climate and local conditions. Our results reveal that local trends of abundance, richness and diversity differ among biogeoregions, realms and taxonomic groups, demonstrating that biodiversity changes at local scale are often complex and cannot be easily generalized. However, we find increases in richness and abundance with increasing temperature and naturalness as well as a clear spatial pattern in changes in community composition (i.e. temporal taxonomic turnover) in most biogeoregions of Northern and Eastern Europe.
- Published
- 2020
11. Monitoring verstoring en potentiële verstoringsbronnen van vogels en zeehonden in de Waddenzee 2016
- Author
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Ens, B., Kleefstra, R., Polwijk, F., Vroom, M., Zee, E. van der, Rippen, A., Sikkema, M., Ens, B., Kleefstra, R., Polwijk, F., Vroom, M., Zee, E. van der, Rippen, A., and Sikkema, M.
- Abstract
Het Actieplan Vaarrecreatie Waddenzee (AVW) beoogt een duurzaam samenspel van mens en natuur in de Waddenzee. De hoofdvraag van het in dat kader opgestelde monitoringplan luidt: "Heeft het gedrag van de recreanten effect op de natuurwaarden van de Waddenzee op de plekken waar ze samenkomen en helpen de ingestelde maatregelen?" Deze rapportage beschrijft de gegevens die zijn verzameld in het kader van dit monitoringplan over de vogels en de zeehonden, de verstoringen van die vogels en zeehonden en de potentiële verstoringsbronnen voor het monitoringjaar 2016. Daarbij wordt ook een uitgebreid overzicht gegeven van de bestaande monitoring van niet-broedende vogels en zeehonden en van natuurlijke verstoringsbronnen.
- Published
- 2017
12. invloed van beweiding op de biodiversiteit van kwelders
- Author
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Esselink, P., Ens, B., Lagendijk, G., Mandema, F., Nolte, S., Tinbergen, J., Klink, R. van, Wallis de Vries, M., Bakker, J., Esselink, P., Ens, B., Lagendijk, G., Mandema, F., Nolte, S., Tinbergen, J., Klink, R. van, Wallis de Vries, M., and Bakker, J.
- Abstract
Veel Noordwest-Europese kwelders zijn van oudsher in gebruik als weidegrond. Als dit gebruik wegvalt, leidt in veel gevallen successie tot een ontwikkeling van een soortenarme Zeekweek-vegetatie. Plaatselijk kan de successie wellicht worden teruggezet door kwelders een grotere dynamiek te geven en te streven naar een afslag/aangroeicyclus. In de praktijk zal echter voor het merendeel van de kwelders behoud en herstel van de biodiversiteit alleen mogelijk zijn bij een actief beheer, zoals beweiding. De vraag ‘welk beweidingsregime welke natuurwaarden oplevert’ bleef hierbij echter onbeantwoord. Voor een antwoord op deze vraag is in 2009 een meerjarig experimenteel onderzoek opgezet, waarin de effecten van verschillende soorten vee in hoge en lage dichtheden op de biodiversiteit met elkaar worden vergeleken. Bijzonder aan het onderzoek is dat binnen hetzelfde project de effecten worden onderzocht op zowel de vegetatie, de ongewervelde fauna, muizen als de vogelbevolking. Dit artikel is gebaseerd op resultaten uit de eerste vier jaar van de proef (2010-2013).
- Published
- 2016
13. (Natuur)behoud in een veranderende wereld: Position paper Ecologie
- Author
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Herman, P.M.J., de Jonge, V.N., Dankers, N., Ens, B J, Wolff, W J, Brinkman, B., Baptist, M., van Leeuwe, M A, Bakker, Jan P, Philippart, C.J.M., Kromkamp, J, van Beusekom, J., van Katwijk, M, Piersma, Theunis, van der Veer, H W, Lammerts, E.J., Oost, A.P., van der Meer, J., Lindeboom, H J, Olff, Han, Jansen, G., Elzenga lab, Bakker group, Piersma group, and Olff group
- Published
- 2009
14. Monitoring van vogels in de Waddenzee met de hand aan de kraan
- Author
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Ens, B., Goedhart, P.W., Koffijberg, K., and Rappoldt, K.
- Subjects
PRI Biometris ,natural gas ,monitoring ,aardgas ,birds ,mijnbouw ,vogels ,mining ,waterfowl ,watervogels - Abstract
SOVON voert in opdracht van de NAM monitoring uit van vogels in de Waddenzee in het kader van de evaluatie van de nieuwe gaswinning, ook wel monitoring “met de hand aan de kraan” genoemd. In de “Nulrapportage monitoring vogels Waddenzee 1991-2006” werden verschillende problemen gesignaleerd die gepaard gaan met het toepassen van de huidige verzamelde data over de watervogels en de broedvogels. Dit rapport gaat dieper op deze materie in en onderzoekt mogelijkheden om de situatie te verbeteren
- Published
- 2008
15. Nieuwe ontdekkingen en mogelijkheden in het onderzoek aan Scholeksters dankzij het UvA Bird Tracking Systeem
- Author
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Ens, B. J., Bom, R. A., Dokter, A. M., Oosterbeek, K., de Jong, Jan, Bouten, W., Ens, B. J., Bom, R. A., Dokter, A. M., Oosterbeek, K., de Jong, Jan, and Bouten, W.
- Abstract
This paper reports on new discoveries and new possibilities due to the deployment of the UvA Bird Tracking System (UvA-BiTS; Bouten et al. 2013) in our investigations of the behavioural ecology of Oystercatchers. This GPS tracker is powered by solar cells and not only stores GPS locations, but also measurements with a tri-axial accelerometer, which can be used to infer behaviour (Shamoun-Baranes et al. 2012; fig. 4). Since 2008, 72 Oystercatchers were fitted with such GPS trackers. Contrary to our expectations, Oystercatchers breeding in the polder of Ameland, where they can feed on earthworms and tipulid larvae, continued to visit the Wadden Sea mudflats throughout the breeding season, just like birds breeding on the saltmarsh of Schiermonnikoog (Fig. 1). We were equally surprised to learn that the breeding populations on both islands included migrants. Whereas many breeding birds remained within 10 km of the breeding territory throughout the winter (Fig. 2), a minority moved much greater distances to a clearly distinct wintering area (Fig. 4). Fidelity to a particular wintering area was high, irrespective of distance moved. We also show examples of the potential of UvA-BiTS to address important scientific questions. Young birds must find a good place to learn how to survive and Fig. 5 shows the behaviour of such a bird: it stays for several months in a particular location and then moves to a new location. Once an individual is sufficiently proficient at surviving, it can enter the competition for breeding territories as a club-bird, usually at the age of three years. Figure 6 compares the ranging behaviour of a non-breeder to that of a breeder at the height of the breeding season
- Published
- 2014
16. Zee en wad
- Author
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Schekkerman, H., Ens, B., Schekkerman, H., and Ens, B.
- Abstract
Het natuurtype ‘zee en wad' omvat droogvallende zand- en slikplaten, die door de zee worden overstroomd, de tussenliggende geulen en diepere zeebodems en het open water daarboven
- Published
- 2010
17. (Natuur)behoud in een veranderende wereld:Position paper Ecologie
- Author
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Herman, P.M.J., Herman, P.M.J., de Jonge, V.N., Dankers, N., Ens, B J, Wolff, W J, Brinkman, B., Baptist, M., van Leeuwe, M A, Bakker, Jan P, Philippart, C.J.M., Kromkamp, J, van Beusekom, J., van Katwijk, M, Piersma, Theunis, van der Veer, H W, Lammerts, E.J., Oost, A.P., van der Meer, J., Lindeboom, H J, Olff, Han, Jansen, G., Herman, P.M.J., Herman, P.M.J., de Jonge, V.N., Dankers, N., Ens, B J, Wolff, W J, Brinkman, B., Baptist, M., van Leeuwe, M A, Bakker, Jan P, Philippart, C.J.M., Kromkamp, J, van Beusekom, J., van Katwijk, M, Piersma, Theunis, van der Veer, H W, Lammerts, E.J., Oost, A.P., van der Meer, J., Lindeboom, H J, Olff, Han, and Jansen, G.
- Published
- 2009
18. Oystercatcher Haematopus ostralegus winter mortality in The Netherlands: the effect of severe weather and food supply
- Author
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Camphuysen, K., Ens, B. J., Dik Heg, Hulscher, J. B., Meer, J., and Smit, C. J.
- Subjects
SUCCESS ,Instituut voor Bos- en Natuuronderzoek ,Beached bird surveys ,Oystercatcher ,Cold rushes ,Food supply ,Ringing recoveries ,BIOMASS ,DUTCH WADDEN SEA ,Institute for Forestry and Nature Research ,Haematopus ostralegus ,Starvation ,TIDAL FLATS ,DENSITY ,DEPTH ,Winter mortality ,POPULATION - Abstract
Wintering Oystercatchers in The Netherlands are concentrated in the Wadden Sea (c. 200 000), with substantial numbers in the Delta area (c. 90 000). Only 1% of the total wintering population is normally found along the North Sea coast. Cold-rushes under severe winter conditions lead to a reduction of wintering numbers in the Wadden Sea, and to increases ir,the Delta and along the North Sea coast. The mortality of wintering Oystercatchers in The Netherlands was studied on the basis of beached bird surveys along the coast of the North Sea and the Wadden Sea between 1969 and 1996. On the whole, the pattern corresponded well to annual mortality estimates from population studies on the Wadden Sea islands of Schiermonnikoog and Texel. Peak numbers of dead Oystercatchers were found in most severe winters, but also in some moderate winters such as in 1976 and 1991. In mild winters, rather small numbers of dead Oystercatchers were recorded. For 1986-1996, annual mortality along the coast ranged from a c. 500 in the mild winters of 1989 to c. 10 000 individuals in 1987 and 1996. Multiple regression analysis of the number of dead Oystercatchers in winter 1975-1996 on the number of cold days and the biomass of benthic prey revealed an explained variance of 66% (n = 21). Both the number of cold days and prey biomass had a significant effect. The results explained the relatively high mortality among Oystercatchers in the moderate winters of 1976 and 1991 (very low food stock), and the low mortality in the severe winter of 1982 (large food stock). The extremely high mortality in 1987 was due to a combination of low food stock and severe weather. The depletion of Cockles and Mussels in the Wadden Sea in the early 1990s, due to a combination of overfishing and failing reproduction, triggered a southward mass movement of Oystercatchers and substantial mortality in the Delta area in the winter of 1990-1991. The absence of a peak in the mortality among adult breeders in the population studies for that particular winter is the major discrepancy between these population studies and the beached bird surveys. It is an indication that primarily non-local, and therefore probably less dominant, Oystercatchers suffered from the food shortage in the Wadden Sea. The results suggest that for Oystercatchers the scarcity of their principal prey due to overfishing has taken its toll. Had this season also been a cold winter, the results suggest that the mortality would have been unprecedented.
- Published
- 1996
19. Homeward bound: Problems waders face when migrating from the Banc d'Arguin, Mauritania, to their northern breeding grounds in spring
- Author
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Ens, B. J., Piersma, T., Wolff, W. J., Zwarts, L., and Piersma group
- Abstract
A description of the environment is provided, including a figure for the standing stock of food, experiments on the possible occurrence of salt stress and observations on predation of waders by large falcons. Studies on the geographical breeding origin and the timing of departure in spring allow a time-tabling of the migration schedule. Departure behaviour of waders taking off for migration is described. An energy budget of migration includes a description of the pattern of mass gain, the energetic cost of tissue deposition, the amount of time spent feeding and evidence for internal as well as external limits to the rate of food intake. -from Authors
- Published
- 1990
20. Models of shellfish populations and shorebirds: final report
- Author
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Stillman, R. A., Goss-Custard, J. D., McGrorty, S., West, A. D., Durell, S. E. A. Le V. dit, Clarke, R. T., Caldow, R. W. G., Norris, K. J., Johnstone, I. G., Ens, B. J., Bunskoeke, E. J., v.d. Merwe, A., van der Meer, J., Triplet, P., Odoni, N., Swinfen, R., Cayford, J. T., Stillman, R. A., Goss-Custard, J. D., McGrorty, S., West, A. D., Durell, S. E. A. Le V. dit, Clarke, R. T., Caldow, R. W. G., Norris, K. J., Johnstone, I. G., Ens, B. J., Bunskoeke, E. J., v.d. Merwe, A., van der Meer, J., Triplet, P., Odoni, N., Swinfen, R., and Cayford, J. T.
- Published
- 1996
21. Models of shellfish populations and shorebirds: interim report
- Author
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Goss-Custard, J. D., Stillman, R. A., McGrorty, S., Durell, S. E. A. Le V. dit, Clarke, R. T., Caldow, R. W. G., Norris, K. J., Johnstone, I. G., Ens, B. J., Goss-Custard, J. D., Stillman, R. A., McGrorty, S., Durell, S. E. A. Le V. dit, Clarke, R. T., Caldow, R. W. G., Norris, K. J., Johnstone, I. G., and Ens, B. J.
- Published
- 1995
22. Subtle differences between male and female oystercatchers Haematopus Ostralegus in feeding on the bivalve Macoma Balthica
- Author
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Hulscher, J. B., Acting, D., Bunskoeke, E. J., Ens, B. J., and Dik Heg
- Subjects
DUTCH WADDEN SEA ,bill morphology ,prey profitability ,BILL ,Macoma balthica ,BODY-WEIGHT ,Haematopus ostralegus ,WADERS ,Oystercatcher ,BURYING DEPTH - Abstract
In this paper an analysis is made of subtle behavioural differences between adult male and female Ovstercatchers feeding on Macoma balthica under field conditions and in captivity. Macoma is a tellinid bivalve that in the Dutch Wadden Sea is mainly preyed upon during spring and summer when it is buried at a shallow depth. males lift Macoma more, whereas females handle them mostly in situ. Both sexes handle a Macoma in situ faster than one lifted. Time loss of males in handling more lifted Macoma is compensated by the larger size of lifted Macoma, which yields more flesh. The time the birds need to find an edible Macoma is similar for both sexes, resulting in equal mean food intake rates for males and females in the field. Lifted Macoma are generally hammered and, since males with their short strong bills are more likely to hammer bivalves than females, this difference in bill morphology might explain why males more often lift Macoma than do females, especially as hammering produces a blunt bill tip which would reduce efficiency at opening Macoma in situ. However, none of the selected bill morphology variables showed a relationship within the sexes that explained the differences between the sexes.
23. Effects of 89 Sr on the Production and Maturation of Small Lymphocytes Bearing Surface Immunoglobulin, Fc, and Complement Receptors in Mice
- Author
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Chan, F. P. H., primary and Ens, B. E., additional
- Published
- 1984
- Full Text
- View/download PDF
24. Territory quality, parental effort and reproductive success of oystercatchers (Haematopus ostralegus)
- Author
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Kersten, M., Brenninkmeijer, A., Ens, B. J., and Hulscher, J. B.
- Subjects
BIRD behavior ,EURASIAN oystercatcher ,REPRODUCTION - Published
- 1992
25. Interference among oystercatchers Haematopus ostralegus, feeding on mussels Mytilus edulis on the Exe estuary
- Author
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Goss-Custard, J. D. and Ens, B. J.
- Subjects
MUSSELS ,MYTILUS edulis ,EURASIAN oystercatcher ,PREDATION - Published
- 1984
26. Causes of spatiotemporal variation in reproductive performance of Eurasian oystercatchers in a human-dominated landscape
- Author
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Frauendorf, Magali, de Kroon, J.C.J.M., Ens, B. J., Jongejans, E., van de Pol, M., and Radboud University Nijmegen
- Subjects
Animal Ecology and Physiology - Abstract
Contains fulltext : 252642.pdf (Publisher’s version ) (Open Access) Radboud University, 14 september 2022 Promotor : de Kroon, J.C.J.M. Co-promotores : Ens, B. J., Jongejans, E., van de Pol, M. 378 p.
- Published
- 2022
- Full Text
- View/download PDF
27. Counterpoint
- Author
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Aaron Quigley, Mark Billinghurst, Barrett Ens, Hui-Shyong Yeo, Thammathip Piumsomboon, Pourang Irani, Ens, B, Quigley, Aaron, Yeo, Hui Shyong, Irani, Pourang, Piumsomboon, Thammathip, Billinghurst, Mark, CHI Conference on Human Factors in Computing Systems, CHI EA 2018 Montreal, Canada 21-26 April 2018, and University of St Andrews. School of Computer Science
- Subjects
QA75 ,Computer science ,QA75 Electronic computers. Computer science ,Wearable computer ,wearable computing ,02 engineering and technology ,NS ,Software ,Human–computer interaction ,0202 electrical engineering, electronic engineering, information engineering ,0501 psychology and cognitive sciences ,050107 human factors ,business.industry ,Scale (chemistry) ,05 social sciences ,020207 software engineering ,T Technology ,Computer Graphics and Computer-Aided Design ,gesture interaction ,Counterpoint ,augmented reality ,Human-Computer Interaction ,Augmented reality ,business ,Gesture - Abstract
This paper presents ongoing work on a design exploration for mixed-scale gestures, which interleave microgestures with larger gestures for computer interaction. We describe three prototype applications that show various facets of this multi-dimensional design space. These applications portray various tasks on a Hololens Augmented Reality display, using different combinations of wearable sensors. Future work toward expanding the design space and exploration is discussed, along with plans toward evaluation of mixed-scale gesture design Refereed/Peer-reviewed
- Published
- 2018
- Full Text
- View/download PDF
28. Multi-scale gestural interaction for augmented reality
- Author
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Pourang Irani, Hui-Shyong Yeo, Mark Billinghurst, Barrett Ens, Aaron Quigley, University of St Andrews. School of Computer Science, SIGGRAPH Asia 2017 Mobile Graphics and Interactive Applications Bangkok, Thailand 27-30 November 2017, Ens, B, Quigley, A, Yeo, H-S, Irani, P, and Billinghurst, Mark
- Subjects
Gesture interaction ,QA75 ,Scale (ratio) ,InformationSystems_INFORMATIONINTERFACESANDPRESENTATION(e.g.,HCI) ,Computer science ,QA75 Electronic computers. Computer science ,Interface (computing) ,05 social sciences ,020207 software engineering ,Augmented reality ,02 engineering and technology ,NS ,T Technology ,Human–computer interaction ,0202 electrical engineering, electronic engineering, information engineering ,0501 psychology and cognitive sciences ,Microgestures ,050107 human factors ,Gesture - Abstract
We present a multi-scale gestural interface for augmented reality applications. With virtual objects, gestural interactions such as pointing and grasping can be convenient and intuitive, however they are imprecise, socially awkward, and susceptible to fatigue. Our prototype application uses multiple sensors to detect gestures from both arm and hand motions (macro-scale), and finger gestures (micro-scale). Micro-gestures can provide precise input through a belt-worn sensor configuration, with the hand in a relaxed posture. We present an application that combines direct manipulation with microgestures for precise interaction, beyond the capabilities of direct manipulation alone. Postprint
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- 2017
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29. The ecosystem of health decision making: from fragmentation to synergy.
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Schünemann HJ, Reinap M, Piggott T, Laidmäe E, Köhler K, Pōld M, Ens B, Irs A, Akl EA, Cuello CA, Falavigna M, Gibbens M, Neamtiu L, Parmelli E, Jameleddine M, Pyke L, Verstijnen I, Alonso-Coello P, Tugwell P, Zhang Y, Saz-Parkinson Z, Kuchenmüller T, and Moja L
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- Administrative Personnel, Decision Making, Humans, Ecosystem, Technology Assessment, Biomedical
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Clinicians, patients, policy makers, funders, programme managers, regulators, and science communities invest considerable amounts of time and energy in influencing or making decisions at various levels, using systematic reviews, health technology assessments, guideline recommendations, coverage decisions, selection of essential medicines and diagnostics, quality assurance and improvement schemes, and policy and evidence briefs. The criteria and methods that these actors use in their work differ (eg, the role economic analysis has in decision making), but these methods frequently overlap and exist together. Under the aegis of WHO, we have brought together representatives of different areas to reconcile how the evidence that influences decisions is used across multiple health system decision levels. We describe the overlap and differences in decision-making criteria between different actors in the health sector to provide bridging opportunities through a unifying broad framework that we call theory of everything. Although decision-making activities respond to system needs, processes are often poorly coordinated, both globally and on a country level. A decision made in isolation from other decisions on the same topic could cause misleading, unnecessary, or conflicted inputs to the health system and, therefore, confusion and resource waste., Competing Interests: Declaration of interests HJS is cochair of the GRADE Working Group and reports honoraria from WHO. MF reports support from HTAnalyze Consultoria e Treinamento outside the submitted work. EP and LN are employed by the European Commission. All other authors declared no competing interests., (Copyright © 2022 World Health Organization; licensee Elsevier. This is an Open Access article published under the CC BY 3.0 IGO license which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. In any use of this article, there should be no suggestion that WHO endorses any specific organisation, products or services. The use of the WHO logo is not permitted. This notice should be preserved along with the article's original URL.)
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- 2022
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30. The Effects of Sharing Awareness Cues in Collaborative Mixed Reality.
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Piumsomboon T, Dey A, Ens B, Lee G, and Billinghurst M
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Augmented and Virtual Reality provide unique capabilities for Mixed Reality collaboration. This paper explores how different combinations of virtual awareness cues can provide users with valuable information about their collaborator's attention and actions. In a user study ( n = 32, 16 pairs), we compared different combinations of three cues: Field-of-View (FoV) frustum, Eye-gaze ray, and Head-gaze ray against a baseline condition showing only virtual representations of each collaborator's head and hands. Through a collaborative object finding and placing task, the results showed that awareness cues significantly improved user performance, usability, and subjective preferences, with the combination of the FoV frustum and the Head-gaze ray being best. This work establishes the feasibility of room-scale MR collaboration and the utility of providing virtual awareness cues., (Copyright © 2019 Piumsomboon, Dey, Ens, Lee and Billinghurst.)
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- 2019
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31. Evaluation of a training program for medicines-oriented policymakers to use a database of systematic reviews.
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Colquhoun HL, Lowe D, Helis E, Belanger D, Ens B, Hill S, Mayhew A, Taylor M, and Grimshaw JM
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Background: Suboptimal prescribing and medications use is a problem for health systems globally. Systematic reviews are a comprehensive resource that can help guide evidence-informed decision-making and implementation of interventions addressing such issues; however, a barrier to the use of systematic reviews is their inaccessibility (due to both dispersion across journals and inaccessibility of content). Publicly available databases, such as Rx for Change, provide quick access to summaries of appraised systematic reviews of professional and consumer-oriented interventions to improve prescribing behaviour and appropriate medication use, and may help maximise the use of evidence to inform decisions. The present study aims to evaluate a training program to improve attitudes towards, confidence in skills, intentions to use, and use of systematic review evidence contained within Rx for Change., Methods: Guided by the Knowledge to Action framework, a training program with content customised to local provider and consumer contexts was developed with knowledge user input. The training program consisted of a 6 minute information video, a 1 hour workshop with hands-on, interactive and didactic components, and two post-training reminders. Forty-nine people from five medicines-focused organisations in Canada and Australia attended one of six workshops. Participants were surveyed immediately pre and post and 3 months after training to evaluate their attitudes towards, confidence in skills, intentions to use, and use of Rx for Change, and attitudes towards and confidence in skills for using evidence for decision-making. Analyses for differences for each of the outcomes at three time points (pre, post and 3 months after training) was performed using a random effects model., Results: Immediately post-training, there were higher respondent attitudes towards Rx for Change (mean increase = 0.54 out of 5, 95% CI, 0.18-0.83, P < 0.005); intention to use Rx for Change (0.53, 95% CI, 0.21-0.86, P < 0.005); confidence in skills for using Rx for Change (2.08, 95% CI, 1.74-2.42, P < 0.005); and confidence in skills for using evidence in policy decision-making (0.50, 95% CI, 0.22-0.77, P < .005) compared to pre-training. Confidence in skills for using both Rx for Change and evidence were maintained 3 months after training (both P < 0.005)., Conclusions: Participants of this training program reported sustained improvements in their confidence in skills for using evidence in policy decision-making. This may have important implications for uptake of systematic review evidence promoting improved prescribing and medication use.
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- 2016
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32. Effects of 89Sr on the production and maturation of small lymphocytes bearing surface immunoglobulin, Fc, and complement receptors in mice.
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Chan FP and Ens BE
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- Animals, Bone Marrow Cells, Female, Immunoglobulin M analysis, Injections, Intraperitoneal, Male, Mice, Mice, Inbred C57BL, Spleen cytology, Bone Marrow radiation effects, Lymphocytes immunology, Receptors, Antigen, B-Cell analysis, Receptors, Complement analysis, Receptors, Fc analysis, Strontium Radioisotopes administration & dosage
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Ten-week-old C57B1/6J mice were given an intraperitoneal injection of 100 microCi radiostrontium (89Sr). One and two weeks following injection, the cellular composition of marrow and spleen was examined for cellularity, types of lymphoid cells, and incidences of small lymphocytes bearing sIgM, FcR, and CR. Strontium-89 treatment yielded a significant cell depletion in marrow, whereas spleen cellularity initially increased before returning to normal level in the second week. The increase in spleen cellularity was showed by pulse DNA labeling to be due to local production and not to influx from elsewhere. The percentage of medium and large lymphocytes, precursors of small lymphocytes, increased from 4% in the control spleen to 22% in the 89Sr-treated spleen. The incidences of small lymphocytes bearing sIgM, FcR, and CR were lower than normal levels with the exception of a substantial increase of FcR+ small lymphocytes in the spleen 2 weeks following 89Sr injection. Double-labeling studies, combining rosetting for surface receptors and DNA labeling for cell age, showed that small lymphocytes bearing sIgM, FcR, and CR form part of the major population of indigenous rapidly renewed cells in 89Sr-treated spleen.
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- 1984
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