نتایج جستجو برای: drones

تعداد نتایج: 2785  

Journal: :The Journal of experimental biology 2012
Heike Gätschenberger Olaf Gimple Jürgen Tautz Hildburg Beier

Drones are haploid male individuals whose major social function in honey bee colonies is to produce sperm and mate with a queen. In spite of their limited tasks, the vitality of drones is of utmost importance for the next generation. The immune competence of drones - as compared to worker bees - is largely unexplored. Hence, we studied humoral and cellular immune reactions of in vitro reared dr...

2016
Ashley N. Mortensen James D. Ellis

African honey bees (Apis mellifera scutellata) dramatically changed the South American beekeeping industry as they rapidly spread through the Americas following their introduction into Brazil. In the present study, we aimed to determine if the management of European-derived honey bees (A. mellifera sspp.) could reduce the relative abundance of African-matriline drones at regional mating sites k...

Journal: :CoRR 2018
Xingqin Lin Richard Wiren Sebastian Euler Arvi Sadam Helka-Liina Maattanen Siva D. Muruganathan Shiwei Gao Y.-P. Eric Wang Juhani Kauppi Zhenhua Zou Vijaya Yajnanarayana

Drones are becoming increasingly used in a wide variety of industries and services and are delivering profound socioeconomic benefits. Technology needs to be in place to ensure safe operation and management of the growing fleet of drones. Mobile networks have connected tens of billions of devices on the ground in the past decades and are now ready to connect the flying drones in the sky. In thi...

2017
Jin-Hyeok Kang Young-Min Kwon Kyung-Joon Park

Drones are broadening their scope to various applications such as networking, package delivery, agriculture, rescue, and many more. For proper operation of drones, reliable communication should be guaranteed because drones are remotely controlled. When drones experience communication failure due to bad channel condition, interference, or jamming in a certain area, one existing solution is to ex...

2015
Tavish Vaidya Micah Sherr

This position paper explores the threat to individual privacy due to the widespread use of consumer drones. Present day consumer drones are equipped with sensors such as cameras and microphones, and their types and numbers can be well expected to increase in future. Drone operators have absolute control on where the drones fly and what the on-board sensors record with no options for bystanders ...

2017
Chien-Ming Tseng Chi-Kin Chau Khaled Elbassioni Majid Khonji

Autonomous drones (also known as unmanned aerial vehicles) have several advantages over ground vehicles, including agility, swiftness, and energy-efficiency, and hence are convenient for light-weight delivery and substitutions for manned missions in remote operations. It is expected that autonomous drones will be deployed in diverse applications in near future. Typical drones are electric vehic...

2016
Philip Boucher

Some industry and policy actors are concerned about public opposition to civil drones, in particular because of their association with military drones. However, very little is understood about public reactions to the technology. Strategies to 'manage public acceptance' have so far relied upon several untested assumptions. We conducted public engagement activities to explore citizens' visions of...

2018
Guang Yang Xingqin Lin Yan Li Hang Cui Min Xu Dan Wu Henrik Ryd'en Sakib Bin Redhwan

Drones are driving numerous and evolving use cases, and creating transformative socio-economic benefits. Drone operation needs wireless connectivity for communication between drones and ground control systems, among drones, and between drones and air traffic management systems. Mobile networks are well positioned to identify, track, and control the growing fleet of drones. The wide-area, qualit...

Journal: :Journal of evolutionary biology 2003
F B Kraus P Neumann H Scharpenberg J van Praagh R F A Moritz

Honeybees (Apis mellifera L.) have an extreme polyandrous mating system. Worker offspring of 19 naturally mated queens was genotyped with DNA microsatellites, to estimate male reproductive success of 16 drone producing colonies. This allowed for estimating the male mating success on both the colony level and the level of individual drones. The experiment was conducted in a closed population on ...

2017
Florian Bastin Fabrice Savarit Grégory Lafon Jean-Christophe Sandoz

During the mating season, drones (males) of the Western honey bee (Apis mellifera) form congregations numbering thousands high in the air. Virgin queens arrive at these congregations after they have formed and mate on the fly with 15-20 drones. To explain the formation of drone congregations, a drone-produced aggregation pheromone has been proposed many years ago but due to the low accessibilit...

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