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Title:

Global Warming and Northern Hemisphere Sea Ice Extent

Author:

Y. -w. Mo ; D. E. Savage ; B. S. Swartzentruber ; G. Medeiros-ribeiro ; A. M. Bratkovsky ; T. I. Kamins ; D. A. A. Ohlberg ; R. S. Williams ; T. I. Kamins ; E. C. Carr ; ...

Y. -w. Mo ; D. E. Savage ; B. S. Swartzentruber ; G. Medeiros-ribeiro ; A. M. Bratkovsky ; T. I. Kamins ; D. A. A. Ohlberg ; R. S. Williams ; T. I. Kamins ; E. C. Carr ; R. S. Williams ; S. J. Rosner ; R Eports ; T. I. Kamins ; G. Medeiros-ribeiro ; D. A. A. Ohlberg ; R. S. Williams ; F. M. Ross ; J. Tersoff ; R. M. Tromp ; Phys Rev Lett ; R. M. Tromp ; M. Mankos ; M. C. Reuter ; A. W. Ellis ; Z. Gai ; X. Li ; R. G. Zhao ; W. S. Yang ; Phys Rev B ; M. Goryll ; L. Vescan ; K. Schmidt ; S. Mesters ; H. Luth ; P. M. Mooney ; J. Tersoff ; J. O. Chu ; Surf Sci ; Konstantin Y. Vinnikov ; Alan Robock ; Ronald J. Stouffer ; John E. Walsh ; Claire L. Parkinson ; Donald J. Cavalieri ; John F. B. Mitchell ; Donald Garrett ; Victor F. Zakharov Minimize authors

Description:

13. We thank K. Pope for Rutherford backscattering analysis

13. We thank K. Pope for Rutherford backscattering analysis Minimize

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The Pennsylvania State University CiteSeerX Archives

Year of Publication:

2009-08-24

Source:

http://www.gfdl.noaa.gov/reference/bibliography/1999/kyv9901.pdf

http://www.gfdl.noaa.gov/reference/bibliography/1999/kyv9901.pdf Minimize

Document Type:

text

Language:

en

Rights:

Metadata may be used without restrictions as long as the oai identifier remains attached to it.

Metadata may be used without restrictions as long as the oai identifier remains attached to it. Minimize

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Title:

Non-Gaussianity in the Very Small Array cosmic microwave background maps with smooth goodness-of-fit tests

Author:

Rubiño-Martín, José Alberto; Aliaga, Antonio M.; Barreiro, R. B.; Battye, Richard A.; Carreira, Pedro; Cleary, Kieran; Davies, Rod D.; Davis, Richard J.; Dickinson, Clive; G??nova-Santos, Ricardo; Grainge, Keith; Gutiérrez, Carlos M.; Hafez, Yaser A.; Hobson, Michael P.; Jones, Michael E.; Kneissl, Rüdiger; Lancaster, Katy; Lasenby, Anthony; Leahy, J. P.; Maisinger, Klaus; Martínez-González, Enrique; Pooley, Guy G.; Rajguru, Nutan; Rebolo, Rafael; Sanz, José Luis; Saunders, Richard D. E.; Savage, Richard S.; Scaife, Anna; Scott, Paul; Slosar, Anže; Taylor, Angela C.; Titterington, David; Waldram, Elizabeth; Watson, Robert A. Minimize authors

Description:

We have used the Rayner and Best smooth tests of goodness-of-fit to study the Gaussianity of the Very Small Array (VSA) data. These tests are designed to be sensitive to the presence of `smooth' deviations from a given distribution, and are applied to the data transformed into normalized signal-to-noise eigenmodes. In a previous work, they have ...

We have used the Rayner and Best smooth tests of goodness-of-fit to study the Gaussianity of the Very Small Array (VSA) data. These tests are designed to be sensitive to the presence of `smooth' deviations from a given distribution, and are applied to the data transformed into normalized signal-to-noise eigenmodes. In a previous work, they have been already adapted and applied to simulated observations of interferometric experiments. In this paper, we extend the practical implementation of the method to deal with mosaiced observations, by introducing the Arnoldi algorithm. This method permits us to solve large eigenvalue problems with low computational cost.Out of the 41 published VSA individual pointings dedicated to cosmological [cosmic microwave background (CMB)] observations, 37 are found to be consistent with Gaussianity, whereas four pointings show deviations from Gaussianity. In two of them, these deviations can be explained as residual systematic effects of a few visibility points which, when corrected, have a negligible impact on the angular power spectrum. The non-Gaussianity found in the other two (adjacent) pointings seems to be associated to a local deviation of the power spectrum of these fields with respect to the common power spectrum of the complete data set, at angular scales of the third acoustic peak (l = 700-900). No evidence of residual systematics is found in this case, and unsubtracted point sources are not a plausible explanation either. If those visibilities are removed, the differences of the new power spectrum with respect to the published one only affect three bins. A cosmological analysis based on this new VSA power spectrum alone shows no differences in the parameter constraints with respect to our published results, except for the physical baryon density, which decreases by 10 percent.Finally, the method has been also used to analyse the VSA observations in the Corona Borealis supercluster region. Our method finds a clear deviation (99.82 percent) with respect to Gaussianity in the second-order moment of the distribution, and which cannot be explained as systematic effects. A detailed study shows that the non-Gaussianity is produced in scales of l ~ 500, and that this deviation is intrinsic to the data (in the sense that cannot be explained in terms of a Gaussian field with a different power spectrum). This result is consistent with the Gaussianity studies in the Corona Borealis data presented in G??nova-Santos et al. which show a strong decrement that cannot be explained as primordial CMB. Minimize

Year of Publication:

2006-06

Source:

Monthly Notices- Royal Astronomical Society. 2006; 369(2):909-920.

Monthly Notices- Royal Astronomical Society. 2006; 369(2):909-920. Minimize

Document Type:

Original research ; Journal article

Subjects:

methods: data analysis ??? methods: statistical ??? cosmic microwave background ??? cosmology: observations

methods: data analysis ??? methods: statistical ??? cosmic microwave background ??? cosmology: observations Minimize

DDC:

520 Astronomy & allied sciences *(computed)*

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http://www.manchester.ac.uk/escholar/uk-ac-man-scw:7990

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Title:

Mahonian Pairs

Description:

We introduce the notion of a Mahonian pair. Consider the set, P^*, of all words having the positive integers as alphabet. Given finite subsets S,T of P^*, we say that (S,T) is a Mahonian pair if the distribution of the major index, maj, over S is the same as the distribution of the inversion number, inv, over T. So the well-known fact that maj a...

We introduce the notion of a Mahonian pair. Consider the set, P^*, of all words having the positive integers as alphabet. Given finite subsets S,T of P^*, we say that (S,T) is a Mahonian pair if the distribution of the major index, maj, over S is the same as the distribution of the inversion number, inv, over T. So the well-known fact that maj and inv are equidistributed over the symmetric group, S_n, can be expressed by saying that (S_n,S_n) is a Mahonian pair. We investigate various Mahonian pairs (S,T) with S different from T. Our principal tool is Foata's fundamental bijection f: P^* -> P^* since it has the property that maj w = inv f(w) for any word w. We consider various families of words associated with Catalan and Fibonacci numbers. We show that, when restricted to words in {1,2}^*, f transforms familiar statistics on words into natural statistics on integer partitions such as the size of the Durfee square. The Rogers-Ramanujan identities, the Catalan triangle, and various q-analogues also make an appearance. We generalize the definition of Mahonian pairs to infinite sets and use this as a tool to connect a partition bijection of Corteel-Savage-Venkatraman with the Greene-Kleitman decomposition of a Boolean algebra into symmetric chains. We close with comments about future work and open problems. ; Comment: Minor changes suggested by the referees and updated status of the problem of finding new Mahonian pairs; sagan@math.msu.edu and savage@ncsu.edu Minimize

Year of Publication:

2011-01-22

Document Type:

text

Subjects:

Mathematics - Combinatorics ; 05A05 (Primary) ; 05A10 (Secondary) ; 05A15 ; 05A19 ; 05A30 ; 11P81

Mathematics - Combinatorics ; 05A05 (Primary) ; 05A10 (Secondary) ; 05A15 ; 05A19 ; 05A30 ; 11P81 Minimize

DDC:

512 Algebra *(computed)*

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Title:

Large Parabosons versus supersymmetry in Jahn-Teller Systems

Description:

The applications of parabosons by Schmutz (1980) and of supersymmetry by Jarvis {\em et al.} (1984) in Jahn-Teller systems are compared and contrasted. Although a parasupersymmetric Jahn-Teller system has not yet been identified, the method of Schmutz is used here to show that the $E \times \epsilon $ supersymmetric Jahn-Teller Hamiltonian can b...

The applications of parabosons by Schmutz (1980) and of supersymmetry by Jarvis {\em et al.} (1984) in Jahn-Teller systems are compared and contrasted. Although a parasupersymmetric Jahn-Teller system has not yet been identified, the method of Schmutz is used here to show that the $E \times \epsilon $ supersymmetric Jahn-Teller Hamiltonian can be written in terms of paraboson operators. ; Comment: 8pp. (LATEX) (Replaced version includes (non-standard) Sci-Word style file jeep.sty at start of paper.) Minimize

Year of Publication:

1994-06-17

Document Type:

text

Subjects:

High Energy Physics - Theory

High Energy Physics - Theory Minimize

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Title:

Freeze-fracture study of the filamentous, segmented microorganism attached to the murine small bowel.

Author:

Description:

A freeze-fracture study has provided new information about the filamentous, segmented microorganism known to live in the murine small bowel. The intracellular bodies produced by this microbe appear to arise by a modified sporogenesis so that they are enclosed in an envelopment membrane at least prior to release by the filament mother cell. At le...

A freeze-fracture study has provided new information about the filamentous, segmented microorganism known to live in the murine small bowel. The intracellular bodies produced by this microbe appear to arise by a modified sporogenesis so that they are enclosed in an envelopment membrane at least prior to release by the filament mother cell. At least some of the intracellular bodies divide while still within the mother cell, suggesting a reproductive role for these structures. The host epithelial membrane remains intact at the site of attachment, but does appear to have a reduced concentration of intramembrane particles. Changes in the host cytoplasm adjacent to the attachment site are documented and interpreted to be a sol-gel transformation which may stabilize the attachment socket. Minimize

Year of Publication:

1978-06

Document Type:

Text

Language:

en

Subjects:

Research Article

Research Article Minimize

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Title:

Characterization of Lactobacillus sp. strain 100-37 from the murine gastrointestinal tract: ecology, plasmid content, and antagonistic activity toward Clostridium ramosum H1.

Description:

A gram-positive, nonsporulating, microaerophilic rod that had two colonial variants was obtained during a study in which anaerobic bacteria were isolated from murine gastrointestinal tracts and screened for cryptic plasmids. The rod (both colonial variants) was identified as a Lactobacillus sp. (strain 100-37) by selective media, gas chromatogra...

A gram-positive, nonsporulating, microaerophilic rod that had two colonial variants was obtained during a study in which anaerobic bacteria were isolated from murine gastrointestinal tracts and screened for cryptic plasmids. The rod (both colonial variants) was identified as a Lactobacillus sp. (strain 100-37) by selective media, gas chromatography, and biochemical tests. In monoassociated, ex-germfree mice, the bacterium colonized the gastrointestinal tract and formed a thick, continuous layer on the keratinized squamous epithelium of the nonsecreting portion of the stomach. When lysate preparations of both colonial variants were electrophoresed in agarose gels, two bands which stained with ethidium bromide were detected with each lysate. When the DNA preparations were exposed to UV light, the lower ethidium bromide band gradually disappeared while the top band became either broader or more intense. The approximate size of the lower band was 2.2 megadaltons, as determined by comparison with plasmid molecular weight standards. In a search for phenotypes which could be encoded by the cryptic 2.2-megadalton plasmid, we detected an antagonistic activity toward an obligate anaerobe isolated from mouse feces, Clostridium ramosum H1. The antagonistic factor was precipitated with (NH4)2SO4 (70% saturation) from supernatant solutions of broth cultures of strain 100-37. The factor was not inducible with mitomycin C or UV light, but was stable in flowing steam for up to 50 min, and in buffers of pHs over a range of 1.6 to 6.8. It was nondialyzable and inactivated by trypsin and papain.(ABSTRACT TRUNCATED AT 250 WORDS) Minimize

Year of Publication:

1983-11

Document Type:

Text

Language:

en

Subjects:

Research Article

Research Article Minimize

DDC:

572 Biochemistry *(computed)*

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Title:

Higher symmetries in Jahn-Teller systems.

Description:

This thesis provides primarily a full and frank review of the many roles the SO(3) algebra of quasispin has to play in nuclear, atomic and ligand-field theory. It is shown that the intriguing conclusion drawn by Ceulemans in 1984, i.e. that first order Jahn-Teller activity is forbidden in half-filled shell states, is directly related to the part...

This thesis provides primarily a full and frank review of the many roles the SO(3) algebra of quasispin has to play in nuclear, atomic and ligand-field theory. It is shown that the intriguing conclusion drawn by Ceulemans in 1984, i.e. that first order Jahn-Teller activity is forbidden in half-filled shell states, is directly related to the particularly simple expressions for the quasispin character of the half-filled shells, and also of the single-particle irreducible-tensor operators responsible for such activity. The process of making transparent the relationships between the disparate formalisms used to derive selection rules for half-filled shell states involves the definition of a new antiunitary particle-hole conjugation operator with well defined properties and effects with respect to second quantized operators. It is also shown that this new operator is equivalent to the one used by Ceulemans in 1984. Other "higher" symmetries in Jahn-Teller systems are the subject of discussion in Chapter 5, where a first attempt is made at merging the formalisms of supersymmetry and of para-bose statistics in E x e Jahn-Teller Hamiltonians. Minimize

Publisher:

University of Canterbury. Physics

Year of Publication:

1999

Document Type:

Electronic thesis or dissertation ; Text

Language:

en

DDC:

539 Modern physics *(computed)*

Rights:

Copyright E. D. Savage ; http://library.canterbury.ac.nz/thesis/etheses_copyright.shtml

Copyright E. D. Savage ; http://library.canterbury.ac.nz/thesis/etheses_copyright.shtml Minimize

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NZCU

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Title:

Regularly spaced subsums of integer partitions

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Description:

For integer partitions $\lambda :n=a_1+.+a_k$, where $a_1\ge a_2\ge >.\ge a_k\ge 1$, we study the sum $a_1+a_3+.$ of the parts of odd index. We show that the average of this sum, over all partitions $\lambda$ of $n$, is of the form $n/2+(\sqrt{6}/(8\pi))\sqrt{n}\log{n}+c_{2,1}\sqrt{n}+O(\log{n}).$ More generally, we study the sum $a_i+a_{m+i}+a_...

For integer partitions $\lambda :n=a_1+.+a_k$, where $a_1\ge a_2\ge >.\ge a_k\ge 1$, we study the sum $a_1+a_3+.$ of the parts of odd index. We show that the average of this sum, over all partitions $\lambda$ of $n$, is of the form $n/2+(\sqrt{6}/(8\pi))\sqrt{n}\log{n}+c_{2,1}\sqrt{n}+O(\log{n}).$ More generally, we study the sum $a_i+a_{m+i}+a_{2m+i}+.$ of the parts whose indices lie in a given arithmetic progression and we show that the average of this sum, over all partitions of $n$, is of the form $n/m+b_{m,i}\sqrt{n}\log{n}+c_{m,i}\sqrt{n}+O(\log{n})$, with explicitly given constants $b_{m,i},c_{m,i}$. Interestingly, for $m$ odd and $i=(m+1)/2$ we have $b_{m,i}=0$, so in this case the error term is of lower order. The methods used involve asymptotic formulas for the behavior of Lambert series and the Zeta function of Hurwitz. We also show that if $f(n,j)$ is the number of partitions of $n$ the sum of whose parts of even index is $j$, then for every $n$, $f(n,j)$ agrees with a certain universal sequence, Sloane's sequence \texttt{#A000712}, for $j\le n/3$ but not for any larger $j$. Minimize

Year of Publication:

2003-08-06

Document Type:

text

Subjects:

Mathematics - Combinatorics ; 05A17 ; 05A16

Mathematics - Combinatorics ; 05A17 ; 05A16 Minimize

DDC:

512 Algebra *(computed)*

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Title:

Extracting respiratory data from pulse oximeter plethysmogram traces in newborn infants

Author:

Description:

To investigate whether valid respiratory data can be extracted from the pulse oximeter plethysmographic (pleth) trace in healthy newborn infants, pleth data were collected from the foot, and respiratory airflow was simultaneously measured using a facemask. The pleth waveform was analysed using fast Fourier transform (FFT), low-pass filtering (LP...

To investigate whether valid respiratory data can be extracted from the pulse oximeter plethysmographic (pleth) trace in healthy newborn infants, pleth data were collected from the foot, and respiratory airflow was simultaneously measured using a facemask. The pleth waveform was analysed using fast Fourier transform (FFT), low-pass filtering (LPF), and by plotting the peak-to-peak amplitude variation (PtP). Using FFT in 14 term infants, the median (range) respiratory rate from the pleth signal was 43 (30–65) breaths/min, and from the flow signal it was 44 (30–67) breaths/min (median difference 0.01 breaths/min, p>0.05). Both LPF and PtP analysis yielded waveforms with a frequency similar to the respiratory rate. Respiratory information, including respiratory rate and a respiratory-like waveform, can reliably be extracted from the pleth trace of a standard pulse oximeter in newborn infants. Such analysis may be clinically useful for non-invasive assessment of respiratory problems in infants and young children. Minimize

Publisher:

BMJ Publishing Group Ltd

Year of Publication:

2009-07-01 00:00:00.0

Document Type:

TEXT

Language:

en

Subjects:

Short reports

Short reports Minimize

Rights:

Copyright (C) 2009, BMJ Publishing Group

Copyright (C) 2009, BMJ Publishing Group Minimize

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Title:

CONVALESCENT PARATYPHOIDAL AND DYSENTERIC CASES CONSIDERED FROM THE PREVENTIVE STANDPOINT

Author:

Publisher:

BMJ Publishing Group Ltd

Year of Publication:

1916-08-05 00:00:00.0

Document Type:

TEXT

Language:

en

Subjects:

ARTICLES

ARTICLES Minimize

Rights:

Copyright (C) 1916, BMJ Publishing Group Ltd

Copyright (C) 1916, BMJ Publishing Group Ltd Minimize

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