7,446 research outputs found
On stabilizing index and cyclic index of certain amalgamated uniform hypergraphs
No full textLet G be a connected uniform hypergraph and A(G) be the adjacency tensor of G. The largest absolute value of the eigenvalues of A(G) is called the spectral radius of G. The number of eigenvectors of A(G) associated with the spectral radius is called the stabilizing index of G. The number of eigenvalues of A(G) with modulus equal to the spectral radius is called the cyclic index of G. In this paper, we consider a class of amalgamated uniform hypergraphs and compute its stabilizing index and cyclic index.Ministry of Education (MOE)The author Cheng Yeaw Ku is supported by Singapore Ministry of Education AcRF Tier 1 grant RG17/20
Neogeography and GIS, it's not one or the other
No full textNeogeography
Andrew Turner – Founder of Mapufacture, author of 'Introduction to Neogeography'GIS Day 2007 @ KU is sponsored by:
* KU Department of Geography
* State of Kansas Data Access and Support Center (DASC)
* KU Libraries GIS and Scholar Services
* KU Transportation Research Institute
* KU Institute for Policy & Social Research
* Western Air Maps, Inc.
* Coca-Cola
* Kansas Biological Survey
* KU Center for Remote Sensing of Ice Sheets (CReSIS)
* Kansas View Consortiu
X-band and Ku-band PIN diode loaded reflectarray unit cells with adaptive frequency switching
Full text linkThe fast advancement of intelligent new applications has led to the creation of high-performance antennas. Reflectarrays (RAs), also known as planar reflectors, are seen as promising antennas for several such modern-day applications. This work presents a comprehensive investigation of frequency switchable RA antennas operating in the X-band and Ku-band frequency ranges. Various strategic configurations of combined slots have been suggested, using integrated P-layer, I-layer, and N-layer (PIN) diodes, with the purpose of creating unit cells in RAs that may switch frequencies and exhibit a gradual change in phase distribution. The frequency variation achieved in X-band for the ON state of PIN diodes is from 8.13 GHz to 11.69 GHz, whereas for the OFF state it is from 8.13 GHz to 11.68 GHz. Similarly, for Ku-band ON and OFF states of PIN diodes provided frequency variations of 13.6 GHz to 17.1 Ghz and 12.8 Ghz to 16.6 GHz respectively. Frequency tunability of 0.85 GHz and 0.72 GHz has been successfully achieved in X-band and Ku-band
Mapping the News: How Journalists use GIS
No full textAbstract is speaker biography.David Herzog is an assistant professor at the Missouri School of Journalism, where he teaches computer-assisted reporting and serves as the academic adviser to the National Institute for Computer-Assisted Reporting. Before joining the faculty in January 2002, he was an investigative reporter for the Providence Journal in Rhode Island and editor for computer-assisted reporting at The Morning Call in Allentown, Pa. He is author of the book "Mapping the News: Case Studies in GIS and Journalism" (ESRI Press).* KU Department of Geography
* Kansas Biological Survey
* State of Kansas Data Access and Support Center (DASC)
* KU Center for Remote Sensing of Ice Sheets (CReSIS)
* KU Transportation Research Institute
* KU Biodiversity Institute
* KU Institute for Policy & Social Research
* Kansas View Consortium
* Western Air Maps
* KU Libraries
* The Coca-Cola Compan
Kinetics of ligand exchange reaction of Cu(OH)2-poly(vinyl alcohol) complex with potassium cyanide
No full textA two-parameter wind speed algorithm for Ku-band altimeters
Full text linkGlobally distributed crossovers of altimeter and scatterometer observations clearly demonstrate that ocean altimeter backscatter correlates with both the near-surface wind speed and the sea state. Satellite data from TOPEX/Poseidon and NSCAT are used to develop an empirical altimeter wind speed model that attenuates the sea-state signature and improves upon the present operational altimeter wind model. The inversion is defined using a multilayer perceptron neural network with altimeter-derived backscatter and significant wave height as inputs. Comparisons between this new model and past single input routines indicates that the rms wind error is reduced by 10%–15% in tandem with the lowering of wind error residuals dependent on the sea state. Both model intercomparison and validation of the new routine are detailed, including the use of large independent data compilations that include the SeaWinds and ERS scatterometers, ECMWF wind fields, and buoy measurements. The model provides consistent improvement against these varied sources with a wind-independent bias below 0.3 m s?1. The continuous form of the defined function, along with the global data used in its derivation, suggest an algorithm suitable for operational application to Ku-band altimeters. Further model improvement through wave height inclusion is limited due to an inherent multivaluedness between any single realization of the altimeter measurement pair [?o, HS] and observed near-surface winds. This ambiguity indicates that HS is a limited proxy for variable gravity wave properties that impact upon altimeter backscatter
Diversity and intersecting theorems for weak compositions
No full textLet N0 be the set of non-negative integers, and let P(n,k) denote the set of all weak compositions of n with k parts, i.e., P(n,k)={(x1,x2,…,xk)∈N0k:x1+x2+⋯+xk=n}. For any element u=(u1,u2,…,uk)∈P(n,k), denote its ith-coordinate by u(i), i.e., u(i)=ui. A family A⊆P(n,k) is said to be t-intersecting if |{i:u(i)=v(i)}|≥t for all u,v∈A. In this paper, we consider the diversity and other intersecting theorems for weak compositions.Ministry of Education (MOE)The author Cheng Yeaw Ku is supported by Singapore Ministry of Education AcRF Tier 1 grant RG17/20
Campus Open Access Funds: Experiences of the KU “One University” Open Access Author Fund
Full text linkINTRODUCTION: In the summer of 2012, librarians from the Lawrence and Kansas City campuses of the University of Kansas (KU) proposed the creation of a KU “One University” Open Access Fund (OA Author Fund) to support open access publishing for its faculty, students, and staff. KU is a major public research and teaching institution of 28,000 students and 2,600 faculty on five campuses (Lawrence, Kansas City, Overland Park, Wichita, and Salina) (http://ku.edu/about), and has been a leader in open access initiatives for many years. A working group of librarians came together to create and implement a pilot project to explore the administration and impact of an open access publishing fund on KU authors, and the fund was launched in October 2012.
DESCRIPTION OF PROJECT: This report documents the group’s experience in developing eligibility criteria and administering the OA Fund. Here we provide insight into our efforts implementing the project, funding results, and plans for continuation. We share the results of the first two years of the OA Author Fund pilot and the lessons learned about open access fund administration.
NEXT STEPS: At the close of the pilot in May 2014, the OA fund review team solicited feedback from a faculty advisory group regarding grant recipients, allocation of funds by discipline, and the application process. Based on our findings, we revised eligibility criteria to create a more equitable funding opportunity for the second pilot. The fund was re-launched using these new criteria in Fall of 2014
Frequency reconfigurable PIN diode-based Reuleaux-triangle-shaped monopole antenna for UWB/Ku band applications
No full textAbstract This paper presents a frequency reconfigurable monopole antenna developed for UWB/Ku band applications. The design employs a microstrip-fed Reuleaux-triangle-shaped patch with a defected ground structure. The antenna exhibits a wide operating bandwidth achieved due to rectangular slits integrated into the Reuleaux-triangle patch. Meanwhile, adding rectangular slots in the ground plane improves the return loss level. Frequency reconfigurability is obtained by utilizing PIN diodes to adjust the current distribution, altering the antenna’s electrical length via the capacitive and inductive effects induced by the rings near the feed line. The antenna operates in two distinct frequency bands, 2.68–8.55 GHz and 12.7–15.65 GHZ, contingent upon the PIN-diodes’ ON/OFF states. In the OFF state, the antenna covers the UWB region, in particular, the ISM band (5.8 GHz), WLAN band (5.2 GHz), and lower X-band (8 GHz), exhibiting a 10 dB impedance bandwidth from 2.68 to 8.55 GHz with a maximum gain of 2.36 dBi. In the ON state, the antenna functions in the Ku band (12.7–15.65 GHz) with gains from 2.63 to 3.85 dBi. The antenna’s dynamic switching between UWB and Ku band operations makes it suitable for applications such as satellite communications, health monitoring, 5G, aerospace, and remote sensing
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