bluuebunny/crossref_metadata_2025_split huggingface dataset:
In support of innovation theory: innovation in activity patterns and life satisfaction among recently retired individuals
Authors: NIMROD GALIT 
Published: June 2008

ABSTRACTA central theme of ‘innovation theory’, which the author and a colleague have proposed and which is concerned with the triggers, types and benefits of innovation in later life, is that adding brand-new leisure activities after retiring from work enhances post-retirement wellbeing. The study reported in this article aimed to examine this proposition using quantitative data from a nationwide sample in Israel of 378 recently retired individuals. The study explored the frequency of post-retirement innovation in people's leisure repertoires, the association between innovation and retirees' life satisfaction, and factors in the differing life satisfaction of innovators and non-innovators. The results indicate that the inclination toward innovation significantly associated with the respondents' work and retirement histories, as well as with their self-rated health and world region of origin. Innovators had significantly higher life satisfaction than non-innovators, but this difference could not be explained by the number of new activities. In addition, socio-demographic differences failed to explain innovators' wellbeing. While some support for innovation theory was provided, further research is required to explore the dynamics by which innovation at older ages contributes to retirees' wellbeing.
The housing situation and residential strategies of older people in France
Authors: BONVALET CATHERINE , OGG JIM 
Published: June 2008

ABSTRACTDuring the later 20th century, France experienced a dramatic turn around in the quality of its housing. The current cohort of older people witnessed and lived through the transformation. Most people aged over 50 years in France are homeowners and almost one-in-four own a second home. Although the oldest age groups are much less residentially mobile than younger people, home moves are more likely around the age of retirement or widowhood. In recent years, new forms of residential mobility in later life have been emerging. These include a weakening of the commonly observed pattern of a permanent drift away from cities and towns towards areas of childhood origin or family connections. One current trend suggests a preference for preserving residential links with areas of relatively high population density and good access to amenities, coupled with being able to spend time elsewhere, whether in second homes, in children's and grandchildren's homes, or elsewhere. The arrival of the post-1945 baby-boom cohort at retirement has begun, and this may increase the current level of residential mobility and lead to more diverse types, although the change will depend on the development of the housing market as well as residential preferences in old age.
Individual pension-related risk propensities: the effects of socio-demographic characteristics and a spousal pension entitlement on risk attitudes
Authors: CLARK GORDON L. , STRAUSS KENDRA 
Published: June 2008

ABSTRACTThe transition from defined-benefit to defined-contribution occupational-pension plans has placed a premium on the participants' or contributors' decision-making competence. Their attitudes to risk and their responses to available investment options can have far-reaching implications for their retirement income. Behavioural research on risk and uncertainty has raised understanding of the limits of individual decision-making, but the social status and demographic characteristics of plan participants may also affect risk perception and pension choices. By studying a random sample of the British adult population, this paper explores the significance of socio-demographic characteristics for pension-related risk attitudes. It is demonstrated that pension-plan participants do not appear to understand the risks associated with different types of retirement savings and pension plans. The paper also shows that the gender, age and income of plan participants can give rise to distinctive risk propensities, and that marital status and, in particular, whether a spouse also has a pension can also have significant consequences for household risk preferences. These results have implications for those segments of the population that are disadvantaged in the labour market. Employer-provided pensions' education and information programmes may have to be more basic and more closely tailored to the social status of pension plan participants than hitherto assumed or hoped.
Self-focusing effect in Au-target induced by high power pulsed laser at PALS
Authors: Torrisi L. , Margarone D. , Laska L. , Krasa J. , Velyhan A. , Pfeifer M. , Ullschmied J. , Ryc L. 
Published: June 2008

AbstractSelf-focusing effects, induced by ASTERIX pulsed laser at PALS Laboratory of Prague, have been investigated. Laser was employed at the third harmonics (438 nm) and intensities of the order of 1016 W/cm2. Pure Au was used as thin target and irradiated with 30° incidence angle. An ion energy analyzer was employed to detect the energy-to-mass ratio of emitted ions from plasma. Measurements were performed by changing the focal point position with a high spatial resolution step-motor. Results demonstrated that non linear processes, due to self-focusing effects, occurs when the laser beam is focused at about 200 µm in front of the target surface. In such conditions, a new ion group, having high charge state and kinetic energy, is produced because of the increment in temperature of the laser-generated plasma.
Motion analysis of a spherical mobile robot
Authors: Joshi Vrunda A. , Banavar Ravi N. 
Published: June 2008

SUMMARYA path planning algorithm for a spherical mobile robot rolling on a plane is presented in this paper. The robot is actuated by two internal rotors that are fixed to the shafts of two motors. These are in turn mounted on the spherical shell in mutually orthogonal directions. The system is nonholonomic due to the nonintegrable nature of the rolling constraints. Further, the system cannot be converted into a chained form, and neither is it nilpotent nor differentially flat. So existing techniques of nonholonomic path planning cannot be applied directly to the system. The approach presented here uses simple geometrical notions and provides numerically efficient and intuitive solutions. We also present the dynamic model and derive motor torques for execution of the algorithm. Along the proposed paths, we achieve dynamic decoupling of the variables making the algorithm more suitable for practical applications.
Impact of maternal malaria and under-nutrition on intrauterine growth restriction: a prospective ultrasound study in Democratic Republic of Congo
Authors: LANDIS S. H. , LOKOMBA V. , ANANTH C. V. , ATIBU J. , RYDER R. W. , HARTMANN K. E. , THORP J. M. , TSHEFU A. , MESHNICK S. R. 
Published: June 2008

SUMMARYMaternal malaria and under-nutrition are established risk factors for small-for-gestational-age (SGA) births; however, whether malaria is associated with intrauterine growth restriction (IUGR) is unknown. We investigated IUGR risk among 177 HIV-negative pregnant women enrolled in a longitudinal ultrasound study conducted in Democratic Republic of Congo from May 2005 to May 2006. Malaria infection, maternal anthropometrics, and ultrasound estimated fetal weight were measured monthly. All positive malaria cases were treated and intermittent presumptive therapy (IPTp) provided. Log-binomial regression models for IUGR were fitted using generalized estimating equations to account for statistical clustering of repeat IUGR measurements. Twenty-nine percent of fetuses experienced an episode of IUGR with the majority occurring in the third trimester. The risk of IUGR associated with malaria was greatest after three or more cumulative infections (RR 3·3, 95% CI 1·3–8·2) and was two- to eight-fold higher among women with evidence of under-nutrition. Receiving antimalarial treatment in the previous month (for IPTp or treatment) was significantly protective against IUGR (RR 0·5, 95% CI 0·3–0·7). The interaction observed between malaria and under-nutrition suggests that antenatal programmes in malaria endemic areas should incorporate nutritional screening and supplementation in addition to IPTp.
Towards an anatomically correct repair for anomalous left coronary artery arising from the pulmonary trunk
Authors: Muneer Amanullah M. , Rostron Anthony J. , Leslie Hamilton J. R. , Chaudhari Milind P. , Hasan Asif 
Published: June 2008

AbstractBackgroundAnomalous origin of the left coronary artery from the pulmonary trunk is rare, occurring at an incidence of 1 in 300 000. If not diagnosed and treated early, it is life-threatening. Children with the anomaly usually present in infancy with congestive cardiac failure, and are occasionally referred for cardiac transplant. We investigated the medium term outcome for patients following creation of a two-coronary arterial circulation.MethodsBetween 1992 and 2007, we diagnosed 15 patients seen at our Institution as having anomalous origin of the left coronary artery from the pulmonary trunk. Over a period of 13 years, aortic reimplantation was undertaken in 12 of these patients, who form the studied cohort.ResultsDirect reimplantation was performed in 5 patients. In 3 cases, a tension-free anastomosis was created using a caudally based flap. In another 3 cases, an extended flap was used, while a patch arterioplasty was fashioned in the final patient. There were no deaths. Left ventricular function recovered in all but one of the patients, and all patients had a reduction in the degree of mitral regurgitation.ConclusionsAmong the variety of surgical techniques, transfer of the anomalous left coronary artery to the aorta is the ideal method for long-term patency and adequate blood supply. This can be achieved by creating flaps based on the walls of the pulmonary trunk and aorta, producing a dual coronary arterial supply with no mortality and low morbidity.
Pathological changes and myocardial remodelling related to the mode of shunting following surgical palliation for hypoplastic left heart syndrome
Authors: Padalino Massimo A. , Castellani Chiara , Toffoli Silvia , Barbera Mila Della , Milanesi Ornella , Thiene Gaetano , Stellin Giovanni , Angelini Annalisa 
Published: June 2008

AbstractBackgroundThe modification of placing the shunt from the right ventricle to the pulmonary arteries, also known as Sano procedure, has allegedly improved results over the short term in surgical palliation of hypoplastic left heart syndrome with the Norwood procedure. With this in mind, we reviewed autopsied specimens from neonates and children who did not survive after either a classic arterio-pulmonary shunt, or the modified procedure with the shunt placed from the right ventricle to the pulmonary arteries, so as to evaluate the pathological substrates of the remodelling of the systemic right ventricle, assessing any differences induced by the 2 techniques.MethodsWe obtained the hearts from 11 patients with neonatal diagnosis of hypoplastic left heart syndrome who died after the first or second stages of the Norwood sequence of operations, comparing them with 6 normal hearts matched for age and weight. Macroscopic, microscopic and morphometric analysis were performed on each specimen, evaluating the diameter of the myocytes, extracellular matrix remodelling in terms of fibrosis and type of collagen, and vascularization in terms of capillary density.ResultsHypertrophy of the myocytes was significantly increased in the hearts from patients having either a classic arterio-pulmonary or the ventriculo-pulmonary modification of the shunt compared to controls (p < 0.05). Myocardial fibrosis was increased in those having a shunt placed from the right ventricle to the pulmonary arteries when compared to the other 2 groups. The ratio of collagen I to collagen III was similar in those undergoing a classic arterio-pulmonary shunt compared to controls (0.94), but was lower in those having a shunt placed from the right ventricle to the pulmonary arteries (0.61), with an increase in collagen type III. The density of capillaries was lower in those who had undergone a classic arterial shunt when compared to the others.ConclusionWe have shown greater remodelling of the ventricular myocardial extracellular matrix in patients having a shunt from the right ventricle to the pulmonary arteries when compared to those having a classic arterio-pulmonary shunt, with this remodelling progressing even after the neonatal period. This may influence a later suboptimal ventricular performance.
Assessing farmer interest in participatory plant breeding: Who wants to work with scientists?
Authors: Dawson Julie C. , Goldberger Jessica R. 
Published: June 2008

AbstractParticipatory research, particularly participatory plant breeding (PPB), can increase the relevance of public-sector research to the agricultural community. PPB has mostly been used in developing countries with resource-poor farmers, but there is increasing interest among farmers in developed countries who are dissatisfied with the performance of available varieties. In 2006, scientists associated with the winter and spring wheat breeding programs in the Department of Crop and Soil Sciences and the Department of Community and Rural Sociology at Washington State University (WSU) conducted a survey of members of the Washington Association of Wheat Growers. Through analysis of the survey results, we sought to understand (1) whether or not farmers want to work with scientists in PPB programs and (2) the determinants of PPB interest. Results indicated that 52% of Washington wheat growers were interested in working with WSU scientists in a participatory breeding program. Interested farmers tended to be younger and college educated with fewer years of farming experience. Moreover, PPB interest appeared to be related positively to farm size, the number of wheat varieties planted, use of and interest in alternative production and marketing practices (e.g., seed saving, organic agriculture), and prior experience with WSU. Based on this analysis and ongoing discussions with farmers, we hope to develop a participatory wheat breeding program where farmers are able to choose their level of involvement with the breeding process based on their interest and needs. This new program will increase the relevance of WSU's wheat breeding programs to farmers in the state and could serve as a model for other public agricultural research programs seeking to increase farmer involvement and, thereby, democratize agricultural research.
‘I'm getting desperate’: what we know about farmers' markets that fail
Authors: Stephenson Garry , Lev Larry , Brewer Linda 
Published: June 2008

AbstractThis paper explores hidden problems amid the impressive expansion of farmers' markets in Oregon and throughout the United States. Although markets are growing in number, a surprisingly large number of them fail. A challenge for many markets is inadequate revenue to support market operations such as paying for the management personnel to perform functions necessary to grow and sustain markets. Smaller markets may enter a downward spiral in which they cannot attract additional customers because they do not have sufficient vendors but cannot attract additional vendors because they do not have sufficient customers. The analysis identifies five intertwined factors associated with markets that fail: small size, a high need for products, low administrative revenue, a volunteer or low paid manager and high manager turnover. The paper also examines the more general issue of why some markets struggle by exploring a correlation between new markets and inexperienced managers, and effort thresholds for volunteer managers. Recommendations to assist markets toward success include better planning, manager and board of director training and community financial support. The findings of this study have broad application.
External economic drivers and US agricultural production systems
Authors: Halloran J.M. , Archer D.W. 
Published: June 2008

AbstractUS agriculture operates in a market driven economy, although government policies can have influence on what farmers produce and how they produce it. As with other businesses, agricultural producers respond to economic incentives and disincentives, and make decisions to maximize their welfare; usually measured as net income. We examined how external economic drivers shape the type of agricultural systems that producers adopt. Specifically, we considered the influence of technological advancements, income supports embodied in farm legislation, and changes in market structure and consumer demand. Changes in technology have often favored large-scale and specialized operations. Many of the technological advancements have required large-scale production units to justify the investment. Often the technology has been commodity specific. However, there is some evidence that more diversified production units might be able to achieve economies of both scale and scope. The influence of commodity support programs has been ambiguous. As farm legislation has evolved to decouple production decisions from program benefits, the incentives to specialize in program crops (crops that receive price and/or income benefits under federal legislation, such as corn, other grains and oil seeds) have diminished. However, wealth and risk effects, albeit small, may have promoted or inhibited the adoption of a more integrated system. The ability of producers to adopt more integrated systems has been primarily influenced by their natural resource base and proximity to markets. Changes in market structure, channels and consumer demand in the past five decades have been dramatic with consolidation and specialization in both production and marketing sectors. However, the diversity of consumer demand has also created opportunities for more integrated farm operations. There is an increasing number of consumers who have become concerned about how and where their food has been produced. Markets for organic, locally produced, free range and the like are expected to grow. While price and income supports may have been biased towards specialization (as these programs were targeted to specific commodities), the reduction in risk associated with the programs has enabled producers to expand the number and diversity of their production enterprises. Furthermore, through the use of strategic alliances, cooperation among producers on a regional basis may eventually lead to greater integration and diversification than could be achieved for the individual farm operation.
The VLT Interferometer
Authors: Richichi A. 
Published: July 2008

AbstractThe ESO Very Large Telescope Interferometer (VLTI) is arguably the most powerful optical interferometric facility available at present. In addition to the wide choice of baselines and the light collecting power of its 8.2 m and 1.8 m telescopes, the VLTI also offers a smooth and user-friendly operation which makes interferometry accessible to any astronomer and covers a wide range of scientific applications. Behind the routine scientific operations, however, the VLTI is in constant evolution. I will present some of the technological and instrumental improvements which are planned for the near and mid-term future, and discuss their implications for astrometry in particular. Among them, the PRIMA facility and the proposed GRAVITY instrument are designed to reach the level of 10 microarcseconds in the near-infrared.
Searching for sub-stellar companions among nearby white dwarfs, through common proper motion
Authors: Radiszcz M. , Méndez R. A. 
Published: July 2008

AbstractThe purpose of this work is to do a systematic, deep search for sub-stellar objects orbiting nearby white dwarfs (WDs). The scientific interest spans testing specific predictions of models of common envelope phase, as well as providing constraints to planetary system evolution in advanced stages of its parent star. Additionally, we seek to explore the hypothesis about the origin of metal lines in hydrogen WDs, produced by the accretion of tidal disturbed asteroidal or cometary material. This could be linked to the presence of a planetary object. Here, we show preliminary results of our near-infrared astrometric project.
The new CCD Zenith Tube
Authors: Ron C. , Štefka V. , Vondrák J. 
Published: July 2008

AbstractThe reconstruction of the Photographic Zenith Tube (PZT) at Ondřejov has been finished recently. The main improvement of the instrument consists in the replacement of the photographic plate with the CCD chip, and a completely new electronic control system. In addition to the astrometric use of the observations we intend to derive the variations of the local vertical and compare them with gravimetric observations of the nearby station Pecný.
Finding orbital motion of sub-stellar companions - the case of TWA 5B
Authors: Schmidt T. , Neuhäuser R. , Mugrauer M. 
Published: July 2008

AbstractTWA 5B is a brown dwarf companion of H=12 mag, 2″ off the ~5 mag brighter triple star CoD-33° 7795 (=TWA 5), a member of the TW Hydrae association of T Tauri stars at ~55 pc. This object is the first brown dwarf around a pre-main-sequence star (confirmed by common proper motion) ever found. In the last year we have newly reduced VLT NaCo data originally taken in 2003 and combined it with all the available astrometric data of the system to investigate possibly detectable orbital motion of the system. Indeed we were able to find linear orbital motion of the system combining data from HST, VLT and Gemini-North.
Study of centering CCD image of faint satellites near a bright primary object
Authors: Tang Z. H. , Li Y. , Yan Y. R. , Wang S. H. , Qiao R. C. , Shen K. X. 
Published: July 2008

AbstractThe polynomial-fit method is applied to remove the uneven background of a satellite when it is near a bright primary object. Detailed analysis of this method is given. Some useful conclusions are drawn from the results of simulated data.
Phase referencing VLBI astrometry observation system: VERA
Authors: Kobayashi H. , Kawaguchi N. , Manabe S. , Shibata K. M. , Honma M. , Tamura Y. , Kameya O. , Hirota T. , Jike T. , Imai H. , Omodaka T. 
Published: July 2008

AbstractVERA aims at astrometric observations using phase referencing VLBI techniques, whose goal is a 10 micro arc-second accuracy for annual parallax measurements. VERA has four 20-m diameter VLBI radio telescopes in Japanese archipelago with the maximum baseline length of 2,300 km. They have the two-beam observing system, which makes simultaneous observations of two objects possible. This leads to very accurate phase referencing VLBI observations. An important science goal is to make a 3-dimensional map of the Galaxy and reveal its dynamics. In order to achieve this, VERA has the 22GHz and 43GHz bands for H2O and SiO maser objects, respectively. Maser objects are compact and suitable for astrometry observations. VERA's construction was started in 2000 and the array became operational in 2004. We have already measured annual parallaxes and proper motions of some galactic objects. In the future, VERA will collaborate with Korean and Chinese VLBI stations.
Astrometry of Galactic star-forming regions with VERA
Authors: Honma M. , Bushimata T. , Choi Y. K. , Hirota T. , Imai H. , Iwadate K. , Jike T. , Kameno S. , Kameya O. , Kamohara R. , Kan-ya Y. , Kawaguchi N. , Kijima M. , Kim M. K. , Kobayashi H. , Kuji S. , Kurayama T. , Manabe S. , Matsumoto N. , Miyaji T. , Nagayama T. , Nakagawa A. , Nakamura K. , Oh C.-S. , Omodaka T. , Oyama T. , Sakai S. , Sato K. , Sato M. , Sasao T. , Shibata K. M. , Tamura Y. , Yamashita K. 
Published: July 2008

AbstractWe present an overview of recent astrometric results with VERA. Since 2004, we have been conducting astrometry of tens of Galactic maser sources with VERA, and recently obtained trigonometric parallaxes for several sources, with distances ranging from 180 pc to 5.3 kpc. In this paper, we briefly summarize the results for Galactic star-forming regions, including S269, Orion-KL, NGC 1333, ρ-oph, NGC 281 and others.