525 research outputs found
Soil investigation, Ahuimanu Villa cluster development, Kahaluu, Hawaii
Tax map keys: 4-7-04: 3 and 4-7-04: 5Content: report, site plans, dub-drain details, grading recommendations, boring logs, test pit logs, probing logs, and laboratory test dataDevex Corporatio
Compaction report -- Kalama Valley Subdivision, Phase 1, Lots 43 to 52, Hawaii Kai, Oahu, Hawaii
W.O. 423-20Includes recommendations and summary of density testsKalama Associate
Final compaction report -- Kamiloiki Estates Subdivision, Phase II, Hawaii Kai, Hawaii
W.O. 771-10Includes recommendations and density test results.Gray, Rhee, & Associates, Inc
Interim compaction report no. 1 -- Kaluanui Residential Development; Lots 1, 3, 5, 8, 9, 11 to 26; Kaluanui; Oahu; Hawaii
W.O. 761-20Includes recommendations, density test results, and control of compacted fill.George Sakoda RealtyPark Engineering, Inc
Metabolite-mediated catalyst conversion of PFK and PFP
Metabolites known to occur in the cytosol of photosynthetic leaf cells were found to mediate the reversible conversion of pyrophosphate—D-fructose-6-phosphate 1-phosphotransferase (PFP) to phosphofructokinase (PFK) in partially purified preparations from spinach leaves. Preincubation of PFP with fructose 2,6-bisphosphate, ATP or fructose 6-phosphate converted PFP to PFK. The reverse reaction (PFK → PFP) was promoted by UDP-glucose plus pyrophosphate. These conversions in catalytic capability were accompanied by changes in molecular mass and charge. The results are in accord with the view that the alterations in PFP and PFK activity, provisionally called ‘metabolite-mediated catalyst conversion’, represent a regulatory mechanism to direct left cytosolic carbon flux in either the biosynthetic or degradatory direction
Immune Priming: Mothering Males Modulate Immunity
SummaryThe transfer of immunity from mother to offspring is widespread in animals. The father’s contribution to this is usually negligible. However, in a sex-role reversed pipefish where fathers do the mothering, fathers make an important immune priming contribution, too
Spatial and temporal patterns of nest distribution influence sexual selection in a marine fish
In many species, the natural distribution of material resources important for reproduction can profoundly impact reproductive success among individuals and, hence, the opportunity and intensity of sexual selection. Here, we report on a field-based experiment investigating the effects of nest aggregation on sexual selection in a fish, the sand goby Pomatoschistus minutus. We found that the distribution of potential nests (sparse versus aggregated nest treatments) affected patterns of nest colonization and reproductive success. Specifically, in the treatment with aggregated nesting resources, a greater proportion of nests remained unoccupied by sand goby males. Although the size of nesting males did not differ between treatments, eggs accumulated more rapidly when nests were sparsely distributed. We found that the opportunity for selection decreased over time with the accumulation of eggs in the nests in both the aggregated and sparse treatments. Moreover, the effect of male size on reproductive success was influenced by an interaction between nest distribution and time, with the selection gradient being highest right after nest colonization when nests were aggregated, while the opposite pattern was observed in the sparse nest treatment. Such findings highlight the vital role that environmental and social factors can play in determining the importance of male phenotypic traits (in this case, male size). More broadly, our results also underscore how the natural distribution of resources, both in space and time, can impact the strength of sexual selection acting on wild animal populations.Peer reviewe
Intelligent Communication Planning for Constrained Environmental IoT Sensing with Reinforcement Learning
Internet of Things (IoT) technologies have enabled numerous data-driven
mobile applications and have the potential to significantly improve
environmental monitoring and hazard warnings through the deployment of a
network of IoT sensors. However, these IoT devices are often power-constrained
and utilize wireless communication schemes with limited bandwidth. Such power
constraints limit the amount of information each device can share across the
network, while bandwidth limitations hinder sensors' coordination of their
transmissions. In this work, we formulate the communication planning problem of
IoT sensors that track the state of the environment. We seek to optimize
sensors' decisions in collecting environmental data under stringent resource
constraints. We propose a multi-agent reinforcement learning (MARL) method to
find the optimal communication policies for each sensor that maximize the
tracking accuracy subject to the power and bandwidth limitations. MARL learns
and exploits the spatial-temporal correlation of the environmental data at each
sensor's location to reduce the redundant reports from the sensors. Experiments
on wildfire spread with LoRA wireless network simulators show that our MARL
method can learn to balance the need to collect enough data to predict wildfire
spread with unknown bandwidth limitations.Comment: To be published in the 20th Annual IEEE International Conference on
Sensing, Communication, and Networking (SECON 2023
Is science as global as we think?
Author Posting. © The Author(s), 2005. This is the author's version of the work. It is
posted here by permission of Elsevier B. V. for personal use, not for redistribution. The
definitive version was published in Trends in Ecology and Evolution 20 (2005): 475-476, doi:10.1016/j.tree.2005.07.003.A cornerstone of scientific practice is the perceived freedom with which knowledge is disseminated. But does the scientific community make good use of all that is available?
Researchers have, on occasion, been accused of preferentially citing the work of colleagues close to home while ignoring those from other parts of the world
- …