42,092 research outputs found
Evidence for the decay B0→J/ψω and measurement of the relative branching fractions of meson decays to J/ψη and J/ψη′
No full textFirst evidence of the B 0 → J / ψ ω decay is found and the B s 0 → J / ψ η and B s 0 → J / ψ η ′ decays are studied using a dataset corresponding to an integrated luminosity of 1.0 fb -1 collected by the LHCb experiment in proton-proton collisions at a centre-of-mass energy of sqrt(s) = 7 TeV. The branching fractions of these decays are measured relative to that of the B 0 → J / ψ ρ 0 decay:frac(B (B 0 → J / ψ ω), B (B 0 → J / ψ ρ 0)) = 0.89 ± 0.19 (stat) - 0.13 + 0.07 (syst),frac(B (B s 0 → J / ψ η), B (B 0 → J / ψ ρ 0)) = 14.0 ± 1.2 (stat) - 1.5 + 1.1 (syst) - 1.0 + 1.1 (frac(f d, f s)),frac(B (B s 0 → J / ψ η ′), B (B 0 → J / ψ ρ 0)) = 12.7 ± 1.1 (stat) - 1.3 + 0.5 (syst) - 0.9 + 1.0 (frac(f d, f s)), where the last uncertainty is due to the knowledge of f d / f s, the ratio of b-quark hadronization factors that accounts for the different production rate of B 0 and B s 0 mesons. The ratio of the branching fractions of B s 0 → J / ψ η ′ and B s 0 → J / ψ η decays is measured to befrac(B (B s 0 → J / ψ η ′), B (B s 0 → J / ψ η)) = 0.90 ± 0.09 (stat) - 0.02 + 0.06 (syst)
Structural studies on archaeal phytanyl-ether lipids isolated from membranes of extreme halophiles by linear ion-trap multiple-stage tandem mass spectrometry with electrospray ionization
No full textThe structures of archaeal glycerophospholipids and glycolipids are unique in that they consist of phytanyl substituents ether linked to the glycerol backbone, imparting stability to the molecules. In this contribution, we described multiple-stage linear ion-trap combined with high resolution mass spectrometry toward structural characterization of this lipid family desorbed as lithiated adduct ions or as the [M-H]- and [M-2H]2- ions by ESI. MSn on various forms of the lithiated adduct ions yielded rich structurally informative ions leading to complete structure identification of this lipid family, including the location of the methyl branches of the phytanyl chain. By contrast, structural information deriving from MSn on the [M-H]- and [M-2H]2- ions is not complete. The fragmentation pathways in an ion-trap, including unusual internal loss of glycerol moiety and internal loss of hexose found for this lipid family were proposed. This mass spectrometric approach provides a simple tool to facilitate confident characterization of this unique lipid famil
Neuromechanical measurement of motor impairments in relation to upper limb activity limitations after stroke
No full textLoss of upper-limb function is a problem following stroke. Recent research has led to the emergence of new treatments but progress is hampered by lack of reliable objective measures of impairment, and understanding of the underlying impairment mechanisms associated with loss and recovery of functional activity. The aim of this research was to identify, using neuromechanical measurement methods, inter-relationships between motor impairments, and correlates of motor impairments with functional activity limitation in the upper limb of acute and chronic stroke survivors.An instrumented rig has been developed to measure impairments: muscle weakness, active range of movement, motor control accuracy in rhythmic and discrete tracking tasks, spasticity, coactivation, contracture and non-neural stiffness. In pilot studies, signal processing and data analysis techniques have been used to generate novel, clinically and physiologically relevant indices to quantify impairments. In a Main Study, 13 older impaired participants in the acute phase post-stroke, 13 in the chronic phase 14 age-matched unimpaired participants underwent rig assessments and performed a test of upper limb activity. A sub-group of impaired participants were tested on two days for test-retest reliability evaluation.Statistical tests have confirmed the validity of the impairments to distinguish between acute and chronic patients and unimpaired individuals, except coactivation during discrete movements and non-neural stiffness. Repeatability coefficients for the active test indices have been presented as benchmark values for use in future trials. The muscle activation indices showed lower repeatability which highlights the challenge of using these to measure change over time. The impairments that contributed to lower motor control accuracy were reduced extensor weakness, delayed extensor onset timing, coactivation and smaller extension AROM and PROM; coactivation was more strongly associated with motor control accuracy than with spasticity or stiffness.The most important contributors to functional activity in the acute group was extensor weakness, and in the chronic group was motor control accuracy and coactivation (rhythmic task). Contracture was important contributor in both groups, and was associated with weakness and loss of active range of movement rather than spasticity. The findings support the notion that rehabilitation strategies should focus on increasing muscle strength and prevention of contracture. However, assessment of more complex impairments like motor control accuracy and coactivation may be crucial to better target therapy, especially in the later phases post-stroke
Multivariate probability matching of Satellite Infrared and Microwave Radiometric Measurements for Rainfall Retrieval at the Geostationary Scale
No full textCreating a data collection for evaluating rich speech retrieval
No full textWe describe the development of a test collection for the investigation of speech retrieval beyond identification of relevant content. This collection focuses on satisfying user information needs for queries associated with specific types of speech acts. The collection is based on an archive of the Internet video from Internet video sharing platform (blip.tv), and was provided by the MediaEval benchmarking initiative. A crowdsourcing approach was used to identify segments in the video data which contain speech acts, to create a description of the video containing the act and to generate search queries designed to refind this speech act. We describe and reflect on our experiences with crowdsourcing this test collection using the Amazon Mechanical Turk platform. We highlight the challenges of constructing this dataset, including the selection of the data source, design of the crowdsouring task and the specification of queries and relevant items
[Newspaper Clipping: Author Claims Evidence of Second JFK Assassin #1]
No full textNewspaper article titled "Author Claims Evidence of Second JFK Assassin." The article states that author Richard J. Whalen concluded "that there is circumstantial evidence to support the theory of a second assassin in the shooting of President John F. Kennedy.
Trade unions in Turkey : an analysis of their development, role and present situation
No full textThis thesis focuses on the trade union movement in Turkey with particular reference to the Turkish
confederation of trade unions (TURK-IS) and its members. Case studies were conducted in both TURKIS
and its member unions, widely, based on open-ended interviews with union officials, but also
involving the analysis of union's reports, documents and journals, the observation of workers education
seminars and visits to the state's institutions and employers' organisations. The main purposes of the
thesis have been to illustrate the changing nature, role and struggle of the Turkish unions in the context
of the changing economic, political and social structure of Turkey. It also focuses on the dominant
trends in trade unionism in a European context.
The study argues that an explicit and theorised understanding of internal and external pressure on the
trade union movements as they emerge in many countries, is of fundamental significance to the Turkish
trade unions. It is argued that the trend in the Turkish labour relations in the 1960s and 70s seemed to
be the co-operation of unions in the formulation of policies, related to national economic performance
and social stability in politics. In other words, unions were tolerated to provide both economic and
social stability at macro level and manageability and certainty at micro level in the light of the
industrialisation process.
In this context, Import Substitution Industrialisation (lSI) was the model of capital accumulation, which
required trade unions to become integrated within the new economic and political policies in order to
secure an economically and politically stable industrial relations framework. In this respect, the Turkish
unions played a mediating role between the state, employers and workers.
It is also argued that the changing system of capital accumulation (a move from lSI to "market
liberalism") in the 1980s has endangered the traditional institutional arrangements. The traditional role
of interest representation for unions, particularly as mediation between the ruling class and working
class, has become problematic. The decline of union power, due to changes in their environments, has
also weakened the value of central labour organisations as mediators between the state, employers and
workers. The anti-labour policies seems to have been the outcome of strategic interventions of the
governments and employers. In this context, particularly in the 1980s explicit reference to theoretical
frameworks have tended to increase in favour of "strategic choices" and "union identities".
The study argues that in the Turkish case, unions have not been faced with a complete policy of
exclusion. In other words, the material conditions of "integrative" "collaborative" or "corporatist"
policies have been reduced, however, they have not been completely eliminated. The reasons for this
might be that although the economic power of TURK-IS and its members was no longer so important
for the government, the political mediating role of unions became significant in the period of the 1980s,
which included the transition to democracy, the process of integration of Europe, the implementation of
austerity policies and the fear of the possible failure of the parliamentary regime.
I argue in the thesis that under the painful and complex process of economic and political
reconstruction and the development of democracy the Turkish trade unions have been faced with a
number of tactical and political options in the rapidly evolving the issue of European Integration and of
democracy and the increasing uniformity amongst member of TURK-IS. The Turkish case suggests that
trade unions can achieve a position of influence in industrial relations systems as long as they pursue
politically motivated strategies by setting a new agenda for members, articulating the broad long-term
interests of the working class and finally displaying collective responses and collective responsibility. In
this respect, it is argued that there is still a significant scope for a more active initiating and coordinating
role for central labour organisations and unions can pursue more comprehensive and tenable
trade union strategies
An introduction to crowdsourcing for language and multimedia technology research
No full textLanguage and multimedia technology research often relies on
large manually constructed datasets for training or evaluation of algorithms and systems. Constructing these datasets is often expensive with significant challenges in terms of recruitment of personnel to carry out the work. Crowdsourcing methods using scalable pools of workers available on-demand offers a flexible means of rapid low-cost construction of many of these datasets to support existing research requirements and potentially promote new research initiatives that would otherwise not be possible
Letter dated 4 August 1972 from J. F. Lutz to Lorenzo A. Richards
No full textLetter dated 4 August 1972 from J. F. ("Fulton") Lutz, professor of soil science at North Carolina State University, Raleigh, to Lorenzo A. Richards, thanking him for comments on the preliminary draft of Lutz\u27s book on the history of the Soil Science Society of AmericaNORTH CAROLINA STATE UNIVERSITY LT RALEIGH SCHOOL OF AGRICULTURE AND LIFE SCIENCES August 4, 1972 Dr. L. A. Richards 4455 Fifth Street Riverside, California 92501 Dear Lorenzo: Thanks very much for your letter of July 6 and your comments on the preliminary draft 03^ the History of the Soil Science Society of America. I appreciate your taking time to read it and I agree with your suggestions. There is one question I would like to raise. In your letter, you stated "on your manuscript, page 54, you may be in error by citing \u27August 28, 1951, (16:191)\u27". The page number was in error. It should have been 91 rather than 191. You then state "my volume 15 is marked inside the front cover with my signature in ink with the note \u27arrived 4 September, 1951\u27. It did not issue before the next annual meeting, thus demonstrating need for change". I interpret these statements to mean that since you did not receive the report until September 4 it could not have been considered at the August 28 business meeting. However, volume 16, page 91, under \u27Minutes of the Business Meeting August 28, 1951, the following statement appears: "Report of the Committee on Publications presented by L. M. Turk. Motion for its acceptance and adoption carried by standing vote (115 for, 82 against)". I raise this question because I want to be sure that I did not misunderstand your suggestions. I have missed seeing you at the annual meetings the last couple of years and regret that time brings about such changes. I shall probably make my last appearance at the meetings this fall. I look back on our associations with a great deal of pleasure and realize more each day how much our personal and professional associations have meant to me. My best personal regards to you. Yours very sincerely, J. F. Lutz Professor of Soil Science JFL:mh P.S. A copy of page 54 from the manuscript is enclosed so that you can see better what I have referred to above. DEPARTMENT OF SOIL SCIENCE BOX 5907 ZIP 27607 PHONE: (919) 755-2655 A 54 report of his committee, presented at the annual business meeting, October 31, 1950, was not approved (15:425 and 427). Chairman Turk moved that the committee be dismissed. The motion was amended to read that the committee be discharged with commendation, and that motion passed. Later, Dr. F. W. Parker moved that the rejection of the Turk committee be reconsidered and the motion was passed. Dr. Parker then moved that the Publications Committee be commended for its report and that it be requested to continue its efforts to bring about improvement in the publications of the Society. The motion was passed after being amended to include the idea of "accepting papers other than those presented at the annual meeting". The report of the Turk Committee was approved at the business meeting August 28, 1951 (16:/91), and the recommendations were incorporated in the revised by-laws (16:98-99). It provided for: 1) iiisconifeinuance of the Proceedings <am-fre«*\u27 an annual volume ^with the interval between numbers to be determined by the executive committee with the approval of the membership of the Society; 2) publication of papers presented at the annual meeting on a merit basis in competition with contributed papers; 3) the establishment of an Editorial Board (H. E. Myers was named Editor-in-Chief); and 4) provision for the publication to contain, in addition to scientific papers, other materials such as short notes, news items, book reviews, etc. Prior to the establishment of an editorial board, with an editor-in- chief and several associate editors, the papers presented at the annual meeting were reviewed by the officers of each section; that is, the Chairman, Past-Chairman, and the Secretary (later, Vice-Chairman). It was the responsibility of the chairman of each section to reconcile any differences and to make the final decision concerning disposition of the papers. After appointment of an editor-in-chief and associate editors, the papers were presented to the editor-in-chief. He in turn referred them to one of the associate editors or to invitation reviewers before submitting them to the editor. The associate editors were selected to represent the various divisions but were not listed by divisions until 1968 (32:156). Associate editors are free to, and usually do, submit papers anonymously to invitation reviewers. Beginning in 195
Measurement of the CP-violating phase \phi s in Bs->J/\psi\pi+\pi- decays
No full textMeasurement of the mixing-induced CP-violating phase phi_s in Bs decays is of prime importance in probing new physics. Here 7421 +/- 105 signal events from the dominantly CP-odd final state J/\psi pi+ pi- are selected in 1/fb of pp collision data collected at sqrt{s} = 7 TeV with the LHCb detector. A time-dependent fit to the data yields a value of phi_s=-0.019^{+0.173+0.004}_{-0.174-0.003} rad, consistent with the Standard Model expectation. No evidence of direct CP violation is found
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