18,895 research outputs found
Understanding the group size for collaborative work in Wiki-based communities
No full textThis study investigates what factors affect the group size of voluntary contributors to a collaborative task in wiki-based online communities. This study proposes work popularity and online resource availability (scholarly reference and news) as the determinants for group size. The results of the empirical test using the data on 876 English Wikipedia articles show that online resource availability significantly determines the group size, and influences the group performance via the group size. However, work popularity does not affect the group size. The interaction for discussion among group members shows the significant effect as a moderator for the relationship between the group size and group performance
Network Dimensioning, QoE Maximization, and Power Control for Multi-Tier Machine-Type Communications
No full textDue to copyright restrictions and/or publisher's policy full text access from Treasures at UT Dallas is limited to current UTD affiliates (use the provided Link to Article).For a radio resource-limited multi-tier machine-type communication (MTC) network, controlling random access congestion while satisfying the unique requirements of each tier (type) and guaranteeing fairness among nodes is always a challenge. In this paper, we study the network dimensioning and radio resource partitioning for the uplink of an MTC network with the signal-to-interference ratio-based clustering and relaying, where the MTC gateways (MTCGs) capture and forward the packets sent from MTC devices (MTCDs) to the base station (BS). Specifically, under transmission outage probability constraints, we investigate the trade-off between network utility (in terms of transmission capacity and revenue) and resource allocation fairness. With both outage probability constraints and minimum MTCD density constraints, we propose approaches to maximize the weighted sum of quality of experience of different tiers of MTCDs. Furthermore, a transmit power control strategy for MTCG-to-BS link is proposed to achieve a constant data rate.Erik Jonsson School of Engineering and Computer Scienc
ANALYSIS ON WASTE MANAGEMENT BEHAVIOUR OF YANGON CITIZENS. (Minn Nay Han, 2019)
No full textThis study intends to explore the awareness, behaviorand willingness to pay on waste management in Yangon. Survey is conducted at a total 400 respondents by using questionnaires. In the interview questionnaires, it is measured the profile of respondents, daily behavior on waste discharging at home and on the street, waste related awareness level and willingness to pay, it was found that, the awareness level of waste segregation, waste reduction is very low and only under 30% have awareness. Although the service delivered by YCDC is improving there are problem which suffered to people due to the poor waste management. It was found that the percentage of willingness to pay is raised up to 89% at the price level of 1000 MMK per month, 83% at the price level of 1500 MMK per month and 70% at the price level of 2000 MMK per month. But it decreased to 49% at the price level of 2500 MMK per month and 44% at the price level of 3000 MMK per month. To improve the waste management situation of Yangon City, effective awareness raising should be strengthen
Dataset to support the article "High-resolution 𝜙-OFDR using phase unwrap and nonlinearity suppression"
No full textThis dataset is used for realizing high resolution of phase-sensitive Optical Frequency Domain Reflectometer. It is associated with the research paper:
Guo Z, Yan J, Han G, Yu Y, Greenwood D and Marco J (2023) "High-Resolution φ-OFDR Using Phase Unwrap and Nonlinearity Suppression". Journal of Lightwave Technology, 41 (9), 2885-2891. (https://doi.org/10.1109/JLT.2023.3236775).
The data is presented as an excel file:
High_resolution_OFDR_using_phase_unwrap_and_nonlinearity_suppression.xlsx
This work was funded by High Value Manufacturing Catapult and the Engineer and Physical Sciences Research Council - EPSRC EP/V000624/1. The author Gaoce Han would like to acknowledge the China Scholarship Council for sponsoring.</span
Anahita popa Jäger & Minn, 2015, spec. nov.
No full textAnahita popa spec. nov. Figs 1 –6, 63 Type material. MYANMAR: Mandalay Division: Holotype female , Mt Popa [20 ° 55 ' 24 "N, 95 ° 14 ' 24 "E], 1250 m, Heinrich leg. February 1937, ex RII 8021 (SMF). Etymology. The species is named after the type locality; name in apposition. Diagnosis. Small Ctenidae (total length female 8.6). Females of this new species are distinguished from those of A. fauna Karsch, 1879, A. jinsi Jäger, 2012, A. punctulata Hentz, 1844, A. samplexa Yin, Tang & Gong, 2000, and A. wuyiensis Li, Jin & Zhang, 2014 by the median plate distinctly narrower than the epigynal field (Fig. 1) and by the copulatory duct situated medially to ventrally from the spermathecae (Fig. 2; median plate as wide as epigynal field, copulatory duct situated laterally from spermathecae in species listed above); distinguished from A. smythiesi (Simon, 1897), A. feai (F.O. Pickard-Cambridge, 1902) and A. jucunda (Thorell, 1897) by having the anterior median plate wider than the half of its widest part (Fig. 1; narrower than half of the widest part in the species listed above); distinguished from A. maolan Zhu, Chen & Song, 1999 and A. jianfengensis Zhang, Hu & Han, 2011 by the internal duct system (=spermathecae sensu Zhang et al. 2011) bent (Fig. 2; roughly straight and parallel in the 2 preceding species), and from most similar A. denticulata (Simon, 1884) by having a double-Sshaped dorsal internal duct system (Fig. 2; simply bent, roughly kidney-shaped in A. denticulata). Males unknown. Description. Female (holotype). PL 3.5, PW 2.8, AW 1.6, OL 5.1, OW 2.8. Eye diameters and interdistances (Fig. 6): AME 0.17, ALE 0.14, PME 0.30, PLE 0.30, AME–AME 0.08, AME–ALE 0.27, PME–PME 0.10, PME– PLE 0.30, AME–PME 0.10, ALE–PLE 0.14, clypeus height at AME 0.11, clypeus height at ALE 0.39. Palp and leg measurements: palp 3.9 (1.3, 0.6, 0.9, -, 1.1), I 11.5 (3.1, 1.6, 3.3, 2.4, 1.1), II 10.2 (2.9, 1.5, 2.6, 2.2, 1.0), III 9.2 (2.6, 1.2, 2.1, 2.3, 1.0), IV 13.7 (3.7, 1.3, 3.4, 3.9, 1.4). Leg formula 4123. Spination of palp and legs: palp 131, 110, 1111, 1013; femora I p031, d 111, r011, II–III p 112, d 111, r 112, IV p 112, d 111, r002; patellae I–II 0 0 0, III–IV 101; tibiae I–II v 22222, III–IV p 11, d 111, r 11, v 222; metatarsi I–II v 222, III p 111, d012, r 111, v 222, IV p 111, d012, r 111, v 2122. Chelicerae with 3 promarginal, 6 retromarginal teeth, and with elongated patch of 8–10 denticles along entire cheliceral furrow. Retromargin of chelicerae close to fang base with 1 thick and 1 thin bristle. Ventral tarsi with sparse scopula, in metatarsi scopula almost absent. Palpal claw and leg claw I with 4 secondary teeth. Copulatory organ as in diagnosis (Figs 1–3). Epigynal field as long as wide, anterio-laterally with one pair of slit sensilla. Median plate with anterior margins sub-parallel and distinct keel in anterior half, epigynal teeth small, just barely reaching median plate. Internal duct system with two distinct clasp-like structures medially converging anteriorly, fertilisations ducts arising posterio-medially, anteriad. Colouration (Figs 4–5). Yellowish-brown with light brown markings. Prosoma dorsally with distinct light median band, dark lateral bands especially in posterior half with light patches, latter partly fused, frontally with 2 light patches close to ALE. Sternum, coxae, labium and gnathocoxae pale yellowish without pattern. Chelicerae light reddish-brown with diagonal to longitudinal dark lines frontally. Legs yellowish-brown with pattern especially from femora to tibiae. Opisthosoma dorsally with distinct serrated light median band; laterally dark and to the ventral side spotted; ventrally pale yellowish [spinnerets missing]. Male. Unknown Distribution. Known only from the type locality, Mt Victoria from elevation of 1250 m (Fig. 63: inset, blue cross).Published as part of Jäger, Peter & Minn, Myin Zu, 2015, New species in the family Ctenidae Keyserling, 1877 from high altitude habitats in Myanmar, with the first case of penetration of the female's cuticle by a male in the RTA-clade (Arachnida: Araneae: Ctenidae), pp. 235-252 in Zootaxa 3994 (2) on pages 236-238, DOI: 10.11646/zootaxa.3994.2.4, http://zenodo.org/record/23568
Resource Allocation and Performance Analysis for Next Generation Wireless Communication and Radio Astronomy Systems
No full textRadio spectrum is a limited resource for both scientific research and wireless communications
industry. The usage of spectrum can be either active, e.g., wireless data transmission and
radar detection, or passive, e.g., radio astronomy observation. However, with the rapid
growth of active communication and passive signal receiving demand, more efficient and
flexible utilization of spectrum is vital. On the other hand, achieving a high power efficiency is
also important to signal transmission and detection. This dissertation devotes to developing
machine-type communication systems and distributed radio astronomy systems with limited
spectrum and power resources.
For a radio resource limited multi-tier Machine-type Communication (MTC) network, controlling random access congestion while satisfying the unique requirements of each tier and
guaranteeing fairness among nodes is always a challenge. In the first part, we study the
network dimensioning and radio resource partitioning for the uplink of an MTC network
with signal-to-interference ratio (SIR)-based clustering and relaying, where MTC gateways
(MTCGs) capture and forward the packets sent from MTC devices (MTCDs) to the base
station (BS). Specifically, under transmission outage probability constraints, we investigate
the tradeoff between network utility (in terms of transmission capacity and revenue) and
resource allocation fairness. With both outage probability constraints and minimum MTCD
density constraints, we propose approaches to maximize the weighted sum of quality of experience (QoE) of different tiers of MTCDs. Furthermore, a transmit power control strategy
for MTCG-to-BS link is proposed to achieve a constant data rate.
In the second part of this dissertation, we consider a new large-scale communication scheme
where randomly distributed backscatter nodes are involved as secondary users to primary
transmitter and primary receiver pairs. The secondary communication between a backscatter
transmitter and a backscatter receiver introduces additional double fading channels and
has a two-side effect to the primary communications. We derive the signal-to-interferenceplus-noise ratio and signal-to-interference ratio based coverage probabilities for two network
configuration scenarios, which can provide useful insights in designing such systems.
A conflict of the spectrum rights and needs between active wireless communication systems
and passive radio astronomy systems (RASs) has become substantially greater due to the
phenomenal expansion of wireless communications and increased interest in RAS observation. For sustainable growth and coexistence of cellular wireless communications (CWC) and
RAS, a coordinated shared spectrum access paradigm was recently introduced. Embracing
such a paradigm, the third part of this dissertation proposes a distributed auxiliary radio
telescope (DART) system which can geographically and spectrally coexist with CWC while
offering additional capability or performance enhancement to RAS. Theoretical performance
analysis of the DART system with different quantization resolutions is presented, and approximate closed-form expressions are obtained. Adaptation of the cooling power of DART
receivers according to the time-varying ambient temperature is also proposed. Furthermore,
an analytical expression for the DART system parameters under the shared spectrum access paradigm and cooling power constraint to achieve the same performance as the existing
single-dish RAS with a radio quiet zone is developed to provide guidance in the DART sysvii
tem design. The numerical and simulation results illustrate the feasibility and potentials of
the proposed DART system
Han Suyin (Chinese author) speaking at Dallas Brookes Hall.
No full textThis record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/276390Han Suyin (Chinese author) speaking at Dallas Brookes Hall.200056
Item: [1999.0081.00439] "Han Suyin (Chinese author) speaking at Dallas Brookes Hall.
A Study on the mathematics textbooks in the era of the Great Han Empire
No full text이 글은 갑오경장(1894)과 경술 국치(1910) 사이에 간행된 산학(수학) 교재류의 목록을 확인하고, 각 텍스트의 출판과 관련된 사항, 소장처, 이본 등의 서지적 정보와 함께 이 시기 산학 교재류의 국어사 자료로서의 의의를 언어 사용 상의 측면에 초점을 두어 정리하는 것을 목적으로 한다. 이는 현대 한국어 태동기의 분과 학문의 도입 양상에 대한 연구의 일환인 한편, 학술 용어의 번역과 정착을 중심으로 이 시기의 한국어의 어휘 확장 양상을 확인하는 데에 필요한 기초 자료를 정리하는 작업의 한 부분이다. 본 연구에 앞선 산학(수학) 교재류에 대한 연구로는 산학 교재류의 서지 사항에 대해 기술한 강윤호(1973:187-199), 김봉희(1992:247-253), 한길준(2009), 오채환 외(2010) 등이 있고, 한국 수학사를 기술하면서 교재류를 함께 다룬 것으로 김용운·김용국(1982)와 이상구(2013)이 있다.This paper aims to make a whole list of the mathematics textbooks in the era of the Great Han Empire and summerize bibliographical data and linguistic characteristics in view of Korean history. In chapter 1, the author reviewed former studies which deals with the mathematics textbooks in the era of the Great Han Empire. In chapter 2, the author summerized bibliographical data of 45 volumes of 32 kinds textbooks. In chapter 3, the author described linguistic characteristics of the textbooks, especially focusing on writing systems, the use of Arabic numerals, horizontal writing, and presence of index or glossary
Also By The Same Author: AKTiveAuthor, a Citation Graph Approach to Name Disambiguation
No full textThe desire for definitive data and the semantic web drive for inference over heterogeneous data sources requires co-reference resolution to be performed on those data. In particular, name disambiguation is required to allow accurate publication lists, citation counts and impact measures to be determined. This paper describes a graph-based approach to author disambiguation on large-scale citation networks. Using self-citation, co-authorship and document source analyses, AKTiveAuthor clusters papers, achieving precision of 0.997 and recall of 0.818 over a test group of eight surname clusters
Dataset to support the article "High Sensing Accuracy Realisation with Millimetre/sub-Millimetre Resolution in Optical Frequency Domain Reflectometer"
No full textThis dataset is used for realizing high sensing accuracy and sub-millimetre resolution of Optical Frequency Domain Reflectometer. It is associated with the research paper "High Sensing Accuracy Realisation with Millimetre sub-Millimetre Resolution in Optical Frequency Domain Reflectometer" in Journal: Journal of Lightwave Technology.
This work was funded by High Value Manufacturing Catapult, grant reference, 160080 CORE (WMG), titled ‘Smart Sensing for Future Batteries’ and the EPSRC (Engineering and Physical Sciences Research Council), grant reference EP/R004927/1, titled ‘Prosperity Partnership’. The author Gaoce Han would like to acknowledge the China Scholarship Council for sponsoring.</span
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