15,431 research outputs found
Text-fig. 5. Extant Fraxinus fruits photographed by digital camera and X-ray microscopy. a: F. excelsior L. (Sect. Fraxinus); b: F. xanthoxyloides WALL. (Sect. Sciadanthus); c: F. malacophylla HEMSL. (Sect. Ornus). Red arrow refers to the air sac above seed, scale bars = 1 cm. in Fraxinus L. (Oleaceae) Fruits From The Early Oligocene Of Southwest China And Their Biogeographic Implications
No full textText-fig. 5. Extant Fraxinus fruits photographed by digital camera and X-ray microscopy. a: F. excelsior L. (Sect. Fraxinus); b: F. xanthoxyloides WALL. (Sect. Sciadanthus); c: F. malacophylla HEMSL. (Sect. Ornus). Red arrow refers to the air sac above seed, scale bars = 1 cm.Published as part of Wu, Meng-Xiao, Huang, Jian, Su, Tao, Zhou, Zhe-Kun & Xing, Yao-Wu, 2021, Fraxinus L. (Oleaceae) Fruits From The Early Oligocene Of Southwest China And Their Biogeographic Implications, pp. 287-298 in Fossil Imprint 77 (2) on page 291, DOI: 10.37520/fi.2021.021, http://zenodo.org/record/716760
Text-fig. 1. Location of the study site. a: the location of Lühe Town, Yunnan, SW China; b: fossil bearing section, white arrow indicates the fossil collection stratum; c: geological map of fossil site. in Fraxinus L. (Oleaceae) Fruits From The Early Oligocene Of Southwest China And Their Biogeographic Implications
No full textText-fig. 1. Location of the study site. a: the location of Lühe Town, Yunnan, SW China; b: fossil bearing section, white arrow indicates the fossil collection stratum; c: geological map of fossil site.Published as part of Wu, Meng-Xiao, Huang, Jian, Su, Tao, Zhou, Zhe-Kun & Xing, Yao-Wu, 2021, Fraxinus L. (Oleaceae) Fruits From The Early Oligocene Of Southwest China And Their Biogeographic Implications, pp. 287-298 in Fossil Imprint 77 (2) on page 288, DOI: 10.37520/fi.2021.021, http://zenodo.org/record/716760
Wi-Fi RTT Ranging Performance Characterization and Positioning System Design
Full text linkThe aim of this research is to implement a precise Wi-Fi indoor positioning system (IPS) or localization system based upon the IEEE 802.11mc Fine-Timing Measurement (FTM) scheme also known as the Wi-Fi Round Trip Time (RTT) ranging technique, where ranging refers to a sub-process of positioning that determines the distance between a transmitter and receiver. Our system and its algorithms were implemented using a COTS (Commercial-Off-The-Shelf) smartphone and Wi-Fi access points. Experiments were conducted in several real-life indoor environments. This paper presents the detailed Wi-Fi RTT ranging performance of these devices in different system configurations and characterizes the systematic biases and noise model to improve the ranging accuracy. A novel three-step-positioning method is proposed to overcome the issues of no or multiple intersect points in trilateration due to ranging errors to improve positioning accuracy. This consists of first, systematic bias determination and removal; second, Clustering-based Trilateration (CbT) supported by Weighted Concentric Circle Generation (WCCG), namely CbT & WCCG; third, positioning result and trajectory optimization using a Kalman filter. As a result, the evaluation experiments gave a position accuracy of ±1.2 m in 2D static positioning and ±1.3 m for dynamic motion tracking. Also, our CbT & WCCG method demonstrate good tolerance against ranging errors. Moreover, the computational cost and positioning accuracy of CbT & WCCG methods are compared with Least Square (LS) and Recursive Least Square (RLS) methods and the accuracy standard deviation of our algorithm is the closest to the Cramer–Rao bound (CRB)
Distributed Multi-agent Negotiation for Wi-Fi Channel Assignment
No full textChannel allocation in dense, decentralized Wi-Fi networks is a challenging due to the highly nonlinear solution space and the difficulty to estimate the opponent’s utility model. So far, only centralized or mediated approaches have succeeded in applying negotiation to this setting. We propose the first two fully-distributed negotiation approaches for Wi-Fi channel assignment. Both of them leverage a pre-sampling of the utility space with simulated annealing and a noisy estimation of the Wi-Fi utility function. Regarding negotiation protocols, one of the approaches makes use of the Alternating Offers protocol, while the other uses the novel Multiple Offers Protocol for Multilateral Negotiations with Partial Consensus (MOPaC), which naturally matches the problem peculiarities. We compare the performance of our proposed approaches with the previous mediated approach, based on simple text mediation. Our experiments show that our approaches yield better utility outcomes, better fairness and less information disclosure than the mediated approach.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Interactive Intelligenc
Footprint: Cellular assisted Wi-Fi AP discovery on mobile phones for energy saving
No full textRecently commercial mobile phones have been shipped with integrated Wi-Fi NIC (Network Interface Card), while a fundamental barrier for easily using such Wi-Fi is its high energy cost for phone. We profile two integrated mobile phone Wi-Fi NICs and observe that the energy cost on PSM (Power Saving Mode) is greatly reduced, yet the scan state still costs most of the energy when it's not connected on discovering potential AP (Access Point). In this paper, we propose footprint, leveraging the cellular information such as the overheard cellular tower IDs and signal strength, to guild the Wi-Fi scan and thus greatly reduce the number of unnecessary scans through the changes and history logs of the mobile user's locations. Our experiments and implementation demonstrate that our scheme effectively saves energy for mobile phone integrated with Wi-Fi. Copyright 2009 ACM.EI
A relation of Swedenborgianism and anthroposophy: The case of the Finnish author Kersti Bergroth and her novel The Living and the Dead
Full text linkMy article discusses the influence of Emanuel Swedenborg on a Finnish female author, Kersti-Bergroth (1886-1975) through one of Bergroth's novels Eläviä ja kuolleita ('The Living and the Dead', 1945). Bergroth was a prolific author with an anthroposophical bent, and an admirer of German idealism. In this particular novel Bergroth refers explicitly to Swedenborg and the story discloses a number of Sweden-borgian themes: the doctrine of correspondences; a world divided into material, spiritual, and divine realms; and communication with the spirits of the dead. As Bergroth was an active member of the anthroposophical movement, I will also consider the route, spread, and place of Swedenborg's ideas within anthroposophy and theosophy in the twentieth century
Glocalisation of global market forces and the repositioning of a peripheral Russian mining community
No full textIncreasing globalisation and global market forces shape the development of resource peripheries in the Barents region. Foreign direct investments are concrete example of global market forces. Their glocalisation forces the locals to evaluate their consequences for the local development and reposition their communities in global context. This article studies glocalisation of global market forces and preferred directions of repositioning of a peripheral single-industry mining community in the Russian Barents region. The study is based on a case study of local opinions about actual and potential external actors in the economic development of Kovdor, located in the Murmansk region. The paper analyses the preferred owner of the town-constituting enterprise and the local opinions about the EU, USA and China as potential investors to the case study community. The study reveals how local opinions about external forces in the local development are related to local life-worlds. Moreover, the paper shows the impact that economic, political, cultural, historical and technological factors have in forming these opinions about potential foreign investors. The study shows generally positive local opinions about FDI. However, significant differences were found in opinions about different investing countries.publishedVersio
Text-fig. 4. Extant Fraxinus fruits and other groups with similar fruits. a: Ventilago leiocarpa BENTH. (KUN 06190258); b: Liriodendron chinense (HEMSL.) SARG. (KUN 0040571); c: Plenckia populnea REISSEK (K 000537359); d: Fraxinus nigra MARSHALL (KUN 0937878); e: F. anomala TORR. ex S.WATSON (RSA 0064862); f: F. gooddingii LITTLE (USFS 0030124); g: F. platypoda OLIV. (KUN 0027753); h: F. malacophylla HEMSL. (K 000901679); i: F. chinensis ROXB. (KUN 0027530). Scale bar = 1 cm. in Fraxinus L. (Oleaceae) Fruits From The Early Oligocene Of Southwest China And Their Biogeographic Implications
No full textText-fig. 4. Extant Fraxinus fruits and other groups with similar fruits. a: Ventilago leiocarpa BENTH. (KUN 06190258); b: Liriodendron chinense (HEMSL.) SARG. (KUN 0040571); c: Plenckia populnea REISSEK (K 000537359); d: Fraxinus nigra MARSHALL (KUN 0937878); e: F. anomala TORR. ex S.WATSON (RSA 0064862); f: F. gooddingii LITTLE (USFS 0030124); g: F. platypoda OLIV. (KUN 0027753); h: F. malacophylla HEMSL. (K 000901679); i: F. chinensis ROXB. (KUN 0027530). Scale bar = 1 cm.Published as part of Wu, Meng-Xiao, Huang, Jian, Su, Tao, Zhou, Zhe-Kun & Xing, Yao-Wu, 2021, Fraxinus L. (Oleaceae) Fruits From The Early Oligocene Of Southwest China And Their Biogeographic Implications, pp. 287-298 in Fossil Imprint 77 (2) on page 291, DOI: 10.37520/fi.2021.021, http://zenodo.org/record/716760
Text-fig. 6. Stratigraphic and phylogenetic placement inferred for fossil Fraxinus fruits. Only Fraxinus fossil fruits identified on the section level are included. The black color represents selected fossil fruits from published literature (excluding some Eocene North American occurrences not assigned to section), the red color represents the fossil fruits from the Lühe flora, Yunnan, Southwest China. The phylogenetic relationships are based on Hinsinger et al. (2013). in Fraxinus L. (Oleaceae) Fruits From The Early Oligocene Of Southwest China And Their Biogeographic Implications
No full textText-fig. 6. Stratigraphic and phylogenetic placement inferred for fossil Fraxinus fruits. Only Fraxinus fossil fruits identified on the section level are included. The black color represents selected fossil fruits from published literature (excluding some Eocene North American occurrences not assigned to section), the red color represents the fossil fruits from the Lühe flora, Yunnan, Southwest China. The phylogenetic relationships are based on Hinsinger et al. (2013).Published as part of Wu, Meng-Xiao, Huang, Jian, Su, Tao, Zhou, Zhe-Kun & Xing, Yao-Wu, 2021, Fraxinus L. (Oleaceae) Fruits From The Early Oligocene Of Southwest China And Their Biogeographic Implications, pp. 287-298 in Fossil Imprint 77 (2) on page 293, DOI: 10.37520/fi.2021.021, http://zenodo.org/record/716760
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