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https://www.readbyqxmd.com/read/29472477/ultrafast-optical-ranging-using-microresonator-soliton-frequency-combs
#1
P Trocha, M Karpov, D Ganin, M H P Pfeiffer, A Kordts, S Wolf, J Krockenberger, P Marin-Palomo, C Weimann, S Randel, W Freude, T J Kippenberg, C Koos
Light detection and ranging is widely used in science and industry. Over the past decade, optical frequency combs were shown to offer advantages in optical ranging, enabling fast distance acquisition with high accuracy. Driven by emerging high-volume applications such as industrial sensing, drone navigation, or autonomous driving, there is now a growing demand for compact ranging systems. Here, we show that soliton Kerr comb generation in integrated silicon nitride microresonators provides a route to high-performance chip-scale ranging systems...
February 23, 2018: Science
https://www.readbyqxmd.com/read/29468628/acceptability-and-perceived-utility-of-drone-technology-among-emergency-medical-service-responders-and-incident-commanders-for-mass-casualty-incident-management
#2
Alexander Hart, Peter R Chai, Matthew K Griswold, Jeffrey T Lai, Edward W Boyer, John Broach
OBJECTIVE: This study seeks to understand the acceptability and perceived utility of unmanned aerial vehicle (UAV) technology to Mass Casualty Incidents (MCI) scene management. DESIGN: Qualitative questionnaires regarding the ease of operation, perceived usefulness, and training time to operate UAVs were administered to Emergency Medical Technicians (n = 15). SETTING: A Single Urban New England Academic Tertiary Care Medical Center. PARTICIPANTS: Front-line emergency medical service (EMS) providers and senior EMS personnel in Incident Commander roles...
October 2017: American Journal of Disaster Medicine
https://www.readbyqxmd.com/read/29467400/a-saliva-protein-of-varroa-mites-contributes-to-the-toxicity-toward-apis-cerana-and-the-dwv-elevation-in-a-mellifera
#3
Yi Zhang, Richou Han
Varroa destructor mites express strong avoidance of the Apis cerana worker brood in the field. The molecular mechanism for this phenomenon remains unknown. We identified a Varroa toxic protein (VTP), which exhibited toxic activity toward A. cerana worker larvae, in the saliva of these mites, and expressed VTP in an Escherichia coli system. We further demonstrated that recombinant VTP killed A. cerana worker larvae and pupae in the absence of deformed-wing virus (DWV) but was not toxic to A. cerana worker adults and drones...
February 21, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29463064/devising-mobile-sensing-and-actuation-infrastructure-with-drones
#4
Mungyu Bae, Seungho Yoo, Jongtack Jung, Seongjoon Park, Kangho Kim, Joon Yeop Lee Kim, Hwangnam Kim
Vast applications and services have been enabled as the number of mobile or sensing devices with communication capabilities has grown. However, managing the devices, integrating networks or combining services across different networks has become a new problem since each network is not directly connected via back-end core networks or servers. The issue is and has been discussed especially in wireless sensor and actuator networks (WSAN). In such systems, sensors and actuators are tightly coupled, so when an independent WSAN needs to collaborate with other networks, it is difficult to adequately combine them into an integrated infrastructure...
February 19, 2018: Sensors
https://www.readbyqxmd.com/read/29462912/uavs-and-machine-learning-revolutionising-invasive-grass-and-vegetation-surveys-in-remote-arid-lands
#5
Juan Sandino, Felipe Gonzalez, Kerrie Mengersen, Kevin J Gaston
The monitoring of invasive grasses and vegetation in remote areas is challenging, costly, and on the ground sometimes dangerous. Satellite and manned aircraft surveys can assist but their use may be limited due to the ground sampling resolution or cloud cover. Straightforward and accurate surveillance methods are needed to quantify rates of grass invasion, offer appropriate vegetation tracking reports, and apply optimal control methods. This paper presents a pipeline process to detect and generate a pixel-wise segmentation of invasive grasses, using buffel grass (Cenchrus ciliaris) and spinifex (Triodia sp...
February 16, 2018: Sensors
https://www.readbyqxmd.com/read/29443914/using-unmanned-aerial-vehicles-in-postfire-vegetation-survey-campaigns-through-large-and-heterogeneous-areas-opportunities-and-challenges
#6
José Manuel Fernández-Guisuraga, Enoc Sanz-Ablanedo, Susana Suárez-Seoane, Leonor Calvo
This study evaluated the opportunities and challenges of using drones to obtain multispectral orthomosaics at ultra-high resolution that could be useful for monitoring large and heterogeneous burned areas. We conducted a survey using an octocopter equipped with a Parrot SEQUOIA multispectral camera in a 3000 ha framework located within the perimeter of a megafire in Spain. We assessed the quality of both the camera raw imagery and the multispectral orthomosaic obtained, as well as the required processing capability...
February 14, 2018: Sensors
https://www.readbyqxmd.com/read/29440638/energy-use-and-life-cycle-greenhouse-gas-emissions-of-drones-for-commercial-package-delivery
#7
Joshuah K Stolaroff, Constantine Samaras, Emma R O'Neill, Alia Lubers, Alexandra S Mitchell, Daniel Ceperley
The use of automated, unmanned aerial vehicles (drones) to deliver commercial packages is poised to become a new industry, significantly shifting energy use in the freight sector. Here we find the current practical range of multi-copters to be about 4 km with current battery technology, requiring a new network of urban warehouses or waystations as support. We show that, although drones consume less energy per package-km than delivery trucks, the additional warehouse energy required and the longer distances traveled by drones per package greatly increase the life-cycle impacts...
February 13, 2018: Nature Communications
https://www.readbyqxmd.com/read/29421484/winter-honey-bee-colony-losses-varroa-destructor-control-strategies-and-the-role-of-weather-conditions-results-from-a-survey-among-beekeepers
#8
Marco Beyer, Jürgen Junk, Michael Eickermann, Antoine Clermont, François Kraus, Carlo Georges, Andreas Reichart, Lucien Hoffmann
Sets of treatments that were applied against varroa mites in the Luxembourgish beekeeper community were surveyed annually with a questionnaire between the winters 2010/11 and 2014/15. The average temperature and the precipitation sum of the month, when the respective varroa control method was applied were considered as co-variables when evaluating the efficacy of varroa control regimes. Success or failure of control regimes was evaluated based on the percentage of colonies lost per apiary in the winter following the treatment(s)...
February 1, 2018: Research in Veterinary Science
https://www.readbyqxmd.com/read/29402971/identification-and-caste-dependent-expression-patterns-of-dna-methylation-associated-genes-in-bombus-terrestris
#9
Beibei Li, Li Hou, Dan Zhu, Xilian Xu, Shiheng An, Xianhui Wang
DNA methylation has been proposed to play critical roles in caste fate and behavioral plasticity in bumblebees, however, there is little information on its regulatory mechanisms. Here, we identified six important genes mediating the modification of DNA methylation and determined their expression patterns in the bumblebee Bombus terrestris. There is a complete functional DNA methylation system, including four DNA methyltransferases (DNMT1a, DNMT1b, DNMT2, and DNMT3), a DNA demethylase (Ten-eleven translocation), and a methyl-CpG-binding domain protein in B...
February 5, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29394530/breeding-system-and-bumblebee-drone-pollination-of-an-explosive-pollen-releasing-plant-meliosma-tenuis-sabiaceae
#10
Akira A Wong Sato, Makoto Kato
Explosive pollen release is a mechanism by some angiosperms that serves to attach pollen to a pollinator's body. It is usually adopted by species with zygomorphic tubular flowers and pollinated by birds and bees. The tree genus Meliosma (Sabiaceae, Proteales) has unique disc-like flowers that are externally actinomorphic, but internally zygomorphic, and release pollen explosively. To elucidate the adaptive significance of explosive pollen release, we observed flowering behavior, the breeding system, and pollinator visits to flowers of the Japanese species Meliosma tenuis in a temperate forest...
February 2, 2018: Plant Biology
https://www.readbyqxmd.com/read/29390725/web-based-interactive-drone-control-using-hand-gesture
#11
Zhenfei Zhao, Hao Luo, Guang-Hua Song, Zhou Chen, Zhe-Ming Lu, Xiaofeng Wu
This paper develops a drone control prototype based on web technology with the aid of hand gesture. The uplink control command and downlink data (e.g., video) are transmitted by WiFi communication, and all the information exchange is realized on web. The control command is translated from various predetermined hand gestures. Specifically, the hardware of this friendly interactive control system is composed by a quadrotor drone, a computer vision-based hand gesture sensor, and a cost-effective computer. The software is simplified as a web-based user interface program...
January 2018: Review of Scientific Instruments
https://www.readbyqxmd.com/read/29384114/freshly-squeezed-anaphylaxis-caused-by-drone-larvae-juice
#12
J Stoevesandt, A Trautmann
Drone larvae are mostly considered a by-product of beekeeping, but have recently been advo-cated as a high-protein source of food. There are as yet no data concerning their allergenic po-tential. We report on a 29-year old bee keeper who experienced an anaphylactic reaction following the consumption of a freshly prepared beverage from raw drone larvae. Larvae-specific sensitization was confirmed by prick-to-prick and basophil activation testing. Bee stings and classical bee products including honey and royal jelly were tolerated...
November 30, 2017: European Annals of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29382313/opsin-expression-patterns-coincide-with-photoreceptor-development-during-pupal-development-in-the-honey-bee-apis-mellifera
#13
Leonie Lichtenstein, Kornelia Grübel, Johannes Spaethe
BACKGROUND: The compound eyes of insects allow them to catch photons and convert the energy into electric signals. All compound eyes consist of numerous ommatidia, each comprising a fixed number of photoreceptors. Different ommatidial types are characterized by a specific set of photoreceptors differing in spectral sensitivity. In honey bees, males and females possess different ommatidial types forming distinct retinal mosaics. However, data are lacking on retinal ontogeny and the mechanisms by which the eyes are patterned...
January 30, 2018: BMC Developmental Biology
https://www.readbyqxmd.com/read/29358207/blood-delivering-drones-saving-lives-in-africa-and-maybe-soon-in-canada
#14
Wendy Glauser
No abstract text is available yet for this article.
January 22, 2018: CMAJ: Canadian Medical Association Journal, Journal de L'Association Medicale Canadienne
https://www.readbyqxmd.com/read/29273327/quantitative-proteomics-reveals-divergent-responses-in-apis-mellifera-worker-and-drone-pupae-to-parasitization-by-varroa-destructor
#15
Carla Surlis, James C Carolan, Mary Coffey, Kevin Kavanagh
Varroa destructor is a haemophagous ectoparasite of honeybees and is considered a major causal agent of colony losses in Europe and North America. Although originating in Eastern Asia where it parasitizes Apis cerana, it has shifted hosts to the western honeybee Apis mellifera on which it has a greater deleterious effect on the individual and colony level. To investigate this important host-parasite interaction and to determine whether Varroa causes different effects on different castes we conducted a label free quantitative proteomic analysis of Varroa-parasitized and non-parasitized drone and worker Apis mellifera pupae...
December 19, 2017: Journal of Insect Physiology
https://www.readbyqxmd.com/read/29237587/drone-delivery-of-medications-review-of-the-landscape-and-legal-considerations
#16
Connie A Lin, Karishma Shah, Cherie Mauntel, Sachin A Shah
No abstract text is available yet for this article.
December 13, 2017: American Journal of Health-system Pharmacy: AJHP
https://www.readbyqxmd.com/read/29235972/decoding-dna-labels-by-melting-curve-analysis-using-real-time-pcr
#17
József A Balog, Liliána Z Fehér, László G Puskás
Synthetic DNA has been used as an authentication code for a diverse number of applications. However, existing decoding approaches are based on either DNA sequencing or the determination of DNA length variations. Here, we present a simple alternative protocol for labeling different objects using a small number of short DNA sequences that differ in their melting points. Code amplification and decoding can be done in two steps using quantitative PCR (qPCR). To obtain a DNA barcode with high complexity, we defined 8 template groups, each having 4 different DNA templates, yielding 158 (>2...
December 1, 2017: BioTechniques
https://www.readbyqxmd.com/read/29219290/send-in-the-drone-getting-care-to-patients-faster-with-unmanned-aerial-vehicles
#18
Keith Wesley, Karen Wesley
No abstract text is available yet for this article.
2017: JEMS: a Journal of Emergency Medical Services
https://www.readbyqxmd.com/read/29214731/perception-of-human-interaction-based-on-motion-trajectories-from-aerial-videos-to-decontextualized-animations
#19
Tianmin Shu, Yujia Peng, Lifeng Fan, Hongjing Lu, Song-Chun Zhu
People are adept at perceiving interactions from movements of simple shapes, but the underlying mechanism remains unknown. Previous studies have often used object movements defined by experimenters. The present study used aerial videos recorded by drones in a real-life environment to generate decontextualized motion stimuli. Motion trajectories of displayed elements were the only visual input. We measured human judgments of interactiveness between two moving elements and the dynamic change in such judgments over time...
December 7, 2017: Topics in Cognitive Science
https://www.readbyqxmd.com/read/29209933/evaluating-the-role-of-drone-produced-chemical-signals-in-mediating-social-interactions-in-honey-bees-apis-mellifera
#20
Gabriel Villar, Megan D Wolfson, Abraham Hefetz, Christina M Grozinger
Pheromones play a critical role in shaping societies of social insects, including honey bees, Apis mellifera. While diverse functions have been ascribed to queen- and worker-produced compounds, few studies have explored the identity and function of male-produced (drone) compounds. However, several lines of evidence suggest that drones engage in a variety of social interactions inside and outside of the colony. Here we elucidate the chemical composition of extracts of the drone mandibular gland, and test the hypothesis that compounds produced in these glands, or a synthetic blend consisting of the six main compounds, mediate drone social interactions in and out of the colony...
December 6, 2017: Journal of Chemical Ecology
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