Results 1 to 10 of about 1,376 (172)

A Historical Review of Our Knowledge of Brown Lemming Population Cycles at Barrow, Alaska: Cycles No More or Never Before [PDF]

Animals
The literature for brown lemming (Lemmus trimucronatus) and collared lemming (Dicrostonyx groenlandicus) population cycles was revisited from Barrow, Alaska. This review covered observations and research primarily from 1946 to 1974.
Denver W. Holt
doaj   +2 more sources

Whole genomes reveal subpopulations and isolation-by-distance patterns in the Norwegian lemming [PDF]

BMC Biology
Background The Norwegian lemming (Lemmus lemmus) is a small rodent endemic to the Fennoscandian alpine and arctic tundra. The species is known for cyclic population outbreaks and mass movements during peak years.
Isabelle Sofie Feinauer, Francesco Ravasini, Vendela Kempe Lagerholm, Johannes Måsviken, Remi-Andre Olsen, Lucile Soler, Estelle Proux-Wera, Ignas Bunikis, Henrik Lantz, Kerstin Lindblad-Toh, Dorothee Ehrich, Rolf A. Ims, Heikki Henttonen, Nina E. Eide, Øystein Flagstad, Karin Norén, Anders Angerbjörn, Love Dalén   +17 more
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Research on UAV Path Planning Based on Enhanced Artificial Lemming Algorithm [PDF]

Biomimetics
Unmanned aerial vehicle path planning faces multiple challenges in terms of effectiveness and safety. Traditional optimization methods are difficult to use to effectively find the best route.
Yu Liu, Maosheng Fu, Chaochuan Jia, Zhengyu Liu, Xuemei Zhu, Bao Zhou, Jingya Zhang, Hai Liu   +7 more
doaj   +2 more sources

An Improved Artificial Lemming Algorithm Integrating Non-Uniform Mutation and Q-Learning Adaptation for Underwater Manipulator Controller Tuning [PDF]

Biomimetics
To address the rapid population diversity loss and premature convergence of the Artificial Lemming Algorithm (ALA) in complex optimization problems, this paper proposes an Improved Artificial Lemming Algorithm (IALA) with multi-strategy enhancements ...
Ran Wang, Weiquan Huang, Junyu Wu, Chen Chen, Yanjie Song, He Wang   +5 more
doaj   +2 more sources

Snow physical properties may be a significant determinant of lemming population dynamics in the high Arctic

Arctic Science, 2018
Cyclic population fluctuations are common in boreal and Arctic species but the causes of these cycles are still debated today. Among these species, lemmings are Arctic rodents that live and reproduce under the snow and whose large cyclical population ...
Florent Domine, Gilles Gauthier, Vincent Vionnet   +2 more
exaly   +2 more sources

The Effect of Structure Building Small Mammals in a Shifting Arctic Landscape [PDF]

Ecology and Evolution
Landscapes are undergoing ecological changes, and how organisms interact with changing habitats has implications for zoogeochemical influences on ecosystem function (processes and properties). This may be especially true for organisms that alter nutrient
Austin Roy, Jennie R. McLaren
doaj   +2 more sources

Assessing the Ecological Network of Svalbard Through Scaled Interaction Strength Data: Insights From a Century of Research. [PDF]

Ecol Evol
In this work, we integrate existing knowledge on interaction strengths into a conceptual model of the Svalbard Ecological Network. We also highlight current knowledge gaps and challenges in establishing a robust baseline of species interactions in the region.
Zhemchuzhnikov MK, Roslin T, Coulson SJ, Bêty J, Traveset A.   +4 more
europepmc   +2 more sources

Massive MIMO joint beamforming and power allocation via LMS with narwhal lemming optimization and fractional ResNeXt-based control [PDF]

Scientific Reports
Nowadays, next-generation wireless communication networks are used to provide robust and accurate sensing capability, high-quality wireless connections using massive devices, and support high data transmission rates.
Mian Muhammad Kamal, Luo Yinsheng, Tianjun Ma, Husam S. Samkari, Mohammed F. Allehyani, Muhammad Sheraz, Muhammad Hanif Ahmed Khan Khushik, Mohammad Qatawneh, Teong Chee Chuah   +8 more
doaj   +2 more sources

The Migration of the Lemming [PDF]

Nature, 1892
IN discussing the much-debated subject of the westward migration of the Norwegian lemming, the primary cause—as it appears to me—has been altogether overlooked.
W Mattieu Williams, Williams W Mattieu
exaly   +5 more sources

Multi-Mechanism Artificial Lemming Algorithm for Global Optimization and Color Multi-Threshold Image Segmentation [PDF]

Biomimetics
Color multi-threshold image segmentation is a non-convex, gradient-free global optimization problem. The number of decision variables increases with the number of thresholds, leading to a rapid expansion of the search space and increased computational ...
Liang Tao, Lingzhi Li, Fan Lu
doaj   +2 more sources