bluuebunny/crossref_metadata_2025_split huggingface dataset:
Experiential effects on mirror systems and social learning: Implications for social intelligence
Authors: Reader Simon M. 
Published: April 2014

AbstractInvestigations of biases and experiential effects on social learning, social information use, and mirror systems can usefully inform one another. Unconstrained learning is predicted to shape mirror systems when the optimal response to an observed act varies, but constraints may emerge when immediate error-free responses are required and evolutionary or developmental history reliably predicts the optimal response. Given the power of associative learning, such constraints may be rare.
Configuration comparison among kinematically optimized continuum manipulators for robotic surgeries through a single access port
Authors: Xu Kai , Zhao Jiangran , Zheng Xidian 
Published: April 2014

SUMMARYMany recent developments of surgical robots focus on less invasive paradigms, such as laparoscopic SPA (Single Port Access) surgery, NOTES (Natural Orifice Translumenal Endoscopic Surgery), laryngoscopic MIS (Minimally Invasive Surgery), etc. A configuration similarity shared by these surgical robots is that two or more manipulators are inserted through one access port (a laparoscope, an endoscope, or a laryngoscope) for surgical interventions. However, upon designing such a surgical robot, the structure of the inserted manipulators has not been thoroughly explored based on evaluation of their performances. This paper presents a comparison for kinematic performances among three different continuum manipulators. They all could be applied in the aforementioned surgical robots. The structural parameters of these continuum manipulators are firstly optimized to assure a more fair and consistent comparison. This study is conducted in a dimensionless manner and provides scalable results for a wide spectrum of continuum manipulator designs as long as their segments have a constant curvature. The results could serve as a design reference for future developments of surgical robots which use one access port and continuum mechanisms.
Kinematic analysis and workspace determination of hexarot-a novel 6-DOF parallel manipulator with a rotation-symmetric arm system
Authors: Qazani Mohammad Reza Chalak , Pedrammehr Siamak , Rahmani Arash , Danaei Behzad , Ettefagh Mir Mohammad , Rajab Aslan Khani Sheikh , Abdi Hamid 
Published: April 2014

SUMMARYParallel mechanisms possess several advantages such as the possibilities for high acceleration and high accuracy positioning of the end effector. However, most of the proposed parallel manipulators suffer from a limited workspace. In this paper, a novel 6-DOF parallel manipulator with coaxial actuated arms is introduced. Since parallel mechanisms have more workspace limitations compared to that of serial mechanisms, determination of the workspace in parallel manipulators is of the utmost importance. For finding position, angular velocity, and acceleration, in this paper, inverse and forward kinematics of the mechanism are studied and after presenting the workspace limitations, workspace analysis of the hexarot manipulator is performed by using MATLAB software. Next, using the obtained cloud of points from simulation, the overall borders of the workspace are illustrated. Finally, it is shown that this manipulator has the important benefits of combining a large positional workspace in relation to its footprint with a sizable range of platform rotations.
United in Separation: The Inventions of Gel Filtration and the Moral Economy of Research in Swedish Biochemistry, ca. 1950–1970
Authors: Widmalm Sven 
Published: April 2014

ArgumentThe Uppsala school in separation science, under the leadership of Nobel laureates, The (Theodor) Svedberg and Arne Tiselius, was by all counts a half-century-long success story. Chemists at the departments for physical chemistry and biochemistry produced a number of separation techniques that were widely adopted by the scientific community and in various technological applications. Success was also commercial and separation techniques, such as gel filtration, were an important factor behind the meteoric rise of the drug company Pharmacia from the 1950s. The paper focuses on the story behind the invention of gel filtration and the product Sephadex in the 1950s and the emergence of streamlined commercially oriented separation science as a main activity at the department of biochemistry in the 1960s. The dynamics of this development is analyzed from the perspectives of moral economy and storytelling framed by the larger question of the social construction of innovation. The latter point is addressed in a brief discussion about the uses of stories like the one about Sephadex in current research policy.
Circumpolar Science: Scandinavian Approaches to the Arctic and the North Atlantic, ca. 1920 to 1960
Authors: Sörlin Sverker 
Published: April 2014

ArgumentThe Scandinavian countries share a solid reputation as longstanding contributors to top level Arctic research. This received view, however, veils some deep-seated contrasts in the ways that Sweden, Norway, and Denmark have conducted research in the Arctic and the North Atlantic. In this paper it is argued that instead of focusing on the geographical determinism of science – the fact that the Arctic is close to, indeed part of, Scandinavian territories – we should look more closely at the geopolitics of science to understand the differences and similarities between these three Nordic countries. Through case studies of, mainly, Swedish Arctic and North Atlantic glaciology in the 1920s through to the 1940s, and of Norwegian preparations in the 1950s for the International Geophysical Year 1957/58, the paper demonstrates how different styles of research – research agendas, methodological choices, collaborative patterns, international networks, availability of infrastructure, relations to politics and power – are conditioned on economic interests and strategic and geopolitical trajectories, either these are explicitly put in the forefront of scientific priorities as in the case of Norway in the 1950s, or when they are manifestly disregarded in the name of scientific internationalism, as in the case of Swedish glaciology. The case of Danish colonial science in Greenland is only cursorily drawn into this analysis but corroborates the overall thesis. The analysis of this wider science politics of Scandinavian circumpolar science is exercised against a brief introductory backdrop of Arctic science historiography. Its chief message is that the analysis of polar science applying modern theory and method of the social studies of science is comparatively recent and that the full potential of merging the literature of Arctic science and exploration with those of security, geopolitics, indigenous voices, and the politics of nationalism is yet to be realized.
Versions of Milk and Versions of Care: The Emergence of Mother's Milk as an Interested Object and Medicine as a Form of Dispassionate Care
Authors: Asdal Kristin 
Published: April 2014

ArgumentAt the turn of the twentieth century the Norwegian market flourished with milk products intended for infants. But medical doctors argued in favor of “going back to nature”: Women ought to breastfeed their children. This paper explores how a re-naturalization of mother's milk emerged within experimental medicine. The prescribed “natural way” did not develop within medicine alone. The paper demonstrates how the natural developed within a relational space of different versions of milk: the free-market milk, the dirty and decaying milk, and the non-nutritional milk. But why did Norwegian mothers, in contrast to the development in for instance the US, continue to breastfeed their infants? Drawing on the work of the leading pediatrician Theodor Frølich, the paper suggests that this may in part be explained by the development of a distinct version of care: A matter-of-fact, pragmatic and flexible version of care that nevertheless came to enact mother's milk as the supreme form of nutrition to which there was hardly a competing or healthy alternative. “The natural way” became a thought style and was made integral to everyday culture.
Building Transnational Bodies: Norway and the International Development of Laboratory Animal Science, ca. 1956–1980
Authors: Druglitrø Tone , Kirk Robert G. W. 
Published: April 2014

ArgumentThis article adopts a historical perspective to examine the development of Laboratory Animal Science and Medicine, an auxiliary field which formed to facilitate the work of the biomedical sciences by systematically improving laboratory animal production, provision, and maintenance in the post Second World War period. We investigate how Laboratory Animal Science and Medicine co-developed at the local level (responding to national needs and concerns) yet was simultaneously transnational in orientation (responding to the scientific need that knowledge, practices, objects and animals circulate freely). Adapting the work of Tsing (2004), we argue that national differences provided the creative “friction” that helped drive the formation of Laboratory Animal Science and Medicine as a transnational endeavor. Our analysis engages with the themes of this special issue by focusing on the development of Laboratory Animal Science and Medicine in Norway, which both informed wider transnational developments and was formed by them. We show that Laboratory Animal Science and Medicine can only be properly understood from a spatial perspective; whilst it developed and was structured through national “centers,” its orientation was transnational necessitating international networks through which knowledge, practice, technologies, and animals circulated.
A new role for an ancient variable in Appalachia: Paradigm leveling and standardization in West Virginia
Authors: Hazen Kirk 
Published: April 2014

AbstractIn many rural English-speaking communities, linguistic processes such as paradigm leveling come into direct conflict with social processes of standardization. In the US region of Appalachia, an analysis of pastbeleveling illustrates the progression of the sociolinguistic clashes between these forces. A quantitative sociolinguistic examination of leveledwas(e.g.,We was there) for 67 native Appalachian speakers was conducted to assess the status of pastbein light of economic and educational improvements over the 20th century. The results indicate that leveledwasdeclined sharply, with the youngest speakers demonstrating more standardized patterns. Although the overall rate ofwasleveling declined across apparent time, the rate ofwascontraction (e.g.,We's there last night) increased, offering native Appalachians a reduced variant to contest the social push toward a fully standardized system.
Vowel variation and reverse acquisition in rural Syrian child and adolescent language
Authors: Habib Rania 
Published: April 2014

AbstractFour vowel variables are investigated in the speech of 50 rural, nonmigrant children and adolescents aged 6 to 18 years in the Syrian village Oyoun Al-Wadi. Contrary to previous studies, the children initially acquire the urban and later the rural forms of these vowels. This process of acquisition shows the following. First, children show reversal in the acquisition of forms, and thus the rules associated with them; instead of acquiring the local forms first, they acquire the supralocal forms. Second, children can acquire the rules of the second dialect after the age of 8. Third, gender emerges as significant as boys and girls exhibit different linguistic behavior. Fourth, preadolescents emerge as the age group that is most active in building a social identity. Fifth, social-psychological factors motivate the shift from urban to rural forms. These include local identity, gendered social meanings of the variants, and the growth of the children's sociolinguistic competence throughout their preadolescence and adolescence.
The role of African Americans in Philadelphia sound change
Authors: Labov William 
Published: April 2014

AbstractA number of studies of African American communities show a tendency to approximate the phonological patterns of the surrounding mainstream white community. An analysis of the vowel systems of 36 African American speakers in the Philadelphia Neighborhood Corpus compares their development over the 20th century with that of the mainstream community. For vowels involved in change in the white community, African Americans show very different patterns, often moving in opposite directions. The traditional split of short-a words into tense and lax categories is a more fine-grained measure of dialect relations. The degree of participation by African Americans is described by measures of bimodality, which are applied as well to the innovative nasal short-a system. The prototypical African American speakers show no bimodality in either measure, recombining the traditional tense and lax categories into a single short-a in lower mid, nonperipheral position. The lack of relation between the two short-a systems is related to the high degree of residential segregation, in that linguistic contact is largely diffusion among adults rather than the faithful transmission found among children.
LATE SPANISH DOCTORS ON USURY, AND THE EVOLVING SCHOLASTIC TRADITION
Authors: Monsalve Fabio 
Published: April 2014

The scholastic intellectual tradition was the dominant scientific paradigm for nearly five centuries in western Europe. That the economic issues of interest to these scholars were similar throughout the period is undisputable, but were the individual views on these issues also similar? This is a pertinent question, upon which an evaluation of the evolution of this intellectual tradition, which often has been considered as monolithic, can be based.This paper focuses on the analysis of the so-called “natural law case” against usury, and tracks how the lines of intellectual reasoning subtly evolved between early and late scholastics. While the issues, methods, and purposes of scholastic thought remained the same in this period, there also was a systematic evolution within this tradition that makes the essence of the scholastic doctrines conformable to economic realities.
The role of eating frequency on total energy intake and diet quality in a low-income, racially diverse sample of schoolchildren
Authors: Evans E Whitney , Jacques Paul F , Dallal Gerard E , Sacheck Jennifer , Must Aviva 
Published: April 2014

AbstractObjectiveThe relationship of meal and snacking patterns with overall dietary intake and relative weight in children is unclear. The current study was done to examine how eating, snack and meal frequencies relate to total energy intake and diet quality.DesignThe cross-sectional associations of eating, meal and snack frequencies with total energy intake and diet quality, measured by the Healthy Eating Index 2005 (HEI-2005), were examined in separate multivariable mixed models. Differences were examined between elementary school-age participants (9–11 years) and adolescents (12–15 years).SettingTwo non-consecutive 24 h diet recalls were collected from children attending four schools in the greater Boston area, MA, USA.SubjectsOne hundred and seventy-six schoolchildren, aged 9–15 years.ResultsOverall, 82 % of participants consumed three daily meals. Eating, meal and snack frequencies were statistically significantly and positively associated with total energy intake. Each additional reported meal and snack was associated with an 18·5 % and a 9·4 % increase in total energy intake, respectively (P<0·001). The relationships of eating, meal and snack frequencies with diet quality differed by age category. In elementary school-age participants, total eating occasions and snacks increased HEI-2005 score. In adolescents, each additional meal increased HEI-2005 score by 5·40 points (P=0·01), whereas each additional snack decreased HEI-2005 score by 2·73 points (P=0·006).ConclusionsFindings suggest that snacking increases energy intake in schoolchildren. Snacking is associated with better diet quality in elementary school-age children and lower diet quality in adolescents. Further research is needed to elucidate the role of snacking in excess weight gain in children and adolescents.
Radial-Velocity Searches for Exoplanets in East Asia
Authors: Sato Bun'ei 
Published: April 2014

AbstractHundreds of extrasolar planets have been discovered around various types of stars by various techniques during the past decade. Among them precise radial velocity measurements for stars are fundamental technique to detect and confirm exoplanets. In this paper activities in East-Asian region in this research field are introduced: East-Asian Planet Search Network, which is a network searching for planets around evolved intermediate-mass stars, and Subaru/IRD project, which will search for habitable planets around M-type dwarfs using infrared radial-velocity method.
Current and Future of Microlensing Exoplanet Search
Authors: Sumi Takahiro 
Published: April 2014

AbstractGravitational microlensing has a unique sensitivity to exoplanets at outside of the snow-line with masses down to the Earth-mass. Because of the rarity and short timescale of the planetary signal, the survey groups, MOA-II in New Zealand and OGLE-IV in Chile carry out the wide field survey observation towards the galactic bulge to issue alerts in real time. Then telescopes of the follow-up groups conduct high cadence follow-up observation to get dense sampling of the short planetary signal. Recent high cadence survey observations by MOA-II and OGLE-IV have started to find exoplanets without follow-up observation systematically. This is a transition to the next generation 24-hour high cadence survey network which can reveal the mass function of exoplanets down to Earth-mass outside of the snow-line. The Wide Field Infrared Survey Telescope (WFIRST) is the highest ranked recommendation for a large space mission in the recent New Worlds, New Horizons (NWNH) in Astronomy and Astrophysics 2010 Decadal Survey. Exoplanet microlensing program is one of the primary science of WFIRST. WFIRST will find about 2,000 bound planets and 1,000 unbound planets by the high precision continuous survey with 15 min. cadence. WFIRST can complete the statistical census of planetary systems in the Galaxy, from the outer habitable zone to gravitationally unbound planets – a discovery space inaccessible to other exoplanet detection techniques.
Detection and Characterization of Transiting Systems with Smaller Exoplanets
Authors: Hirano Teruyuki , Narita Norio , Fukui Akihiko , Sanchis-Ojeda Roberto , Winn Joshua N. , Suto Yasushi , Taruya Atsushi 
Published: April 2014

AbstractWe present our effort to detect and characterize transiting systems with small exoplanets. First we present our on-going project to detect transiting exoplanets around late-type stars. As many authors point out, late-type stars can host potentially habitable rocky planets, whose transits are detectable with 2-meter class telescopes. We aim at detecting (small-sized) transiting exoplanets around M-type stars and are conducting a survey using the Okayama 1.88m telescope. We introduce our campaign at Okayama. Next we discuss the characterization of small-sized exoplanets. We focus on the measurement of the spin-orbit angle, the angle between the stellar spin axis and planetary orbital axis. The spin-orbit relations are of great importance in discussing planetary formations, evolutions, and migrations. To this point, the Rossiter-McLaughlin (RM) effect, an apparent radial velocity anomaly during a planetary transit, has been mainly investigated to measure the projected spin-orbit angles. However, as the size of the transiting planet becomes smaller, the detection of the RM effect becomes challenging because of the small RM signal. We have newly developed a technique to investigate spin-orbit relations for smaller planets by combining Kepler's ultra-precise photometry and spectroscopic measurements. We show that, contrary to planetary systems with close-in giant planets, most of the systems with small-sized planets (including Earth-sized ones) have smaller spin-orbit angles, which implies a different evolutional history of the planetary systems. We also discuss future prospects on the detection and characterization of smaller transiting exoplanets.
Signatures of Earth-Like Planets in the Chemical Composition of Solar-Type Stars
Authors: Meléndez Jorge , Ramírez Iván 
Published: April 2014

AbstractThe formation of terrestrial and gas giant planets has likely imprinted signatures on the chemical composition of their parent stars, as shown for example by the higher occurrence of giant planets for higher stellar metallicities. There are two new signatures that have been recently proposed by Meléndez et al. (2009, 2012) and Ramírez et al. (2009, 2010) for the formation of rocky planets, and by Ramírez et al. (2011) for gas giant planets. We review here our on-going work on the planet-star connection using solar twins, for which chemical abundances are being obtained at unprecedented precision (0.01 dex).
New MOST Photometry of the 55 Cancri System
Authors: Dragomir Diana , Matthews Jaymie M. , Winn Joshua N. , Rowe Jason F. ,   MOST Science Team
Published: April 2014

AbstractSince the discovery of its transiting nature, the super-Earth 55 Cnc e has become one of the most enthusiastically studied exoplanets, having been observed spectroscopically and photometrically, in the ultraviolet, optical and infrared regimes. To this rapidly growing data set, we contribute 42 days of new, nearly continuous MOST photometry of the 55 Cnc system. Our analysis of these observations together with the discovery photometry obtained in 2011 allows us to determine the planetary radius (1.990+0.084−0.080) and orbital period (0.7365417+0.0000025−0.0000028) of 55 Cnc e with unprecedented precision. We also followed up on the out-of-transit phase variation first observed in the 2011 photometry, and set an upper limit on the depth of the planet's secondary eclipse, leading to an upper limit on its geometric albedo of 0.6.
A Campaign for the Detection of Earth-Mass Planets in the Habitable Zone of Alpha Centauri
Authors: Wittenmyer Robert A. , Endl Michael , Bergmann Christoph , Hearnshaw John , Barnes Stuart I. , Wright Duncan 
Published: April 2014

AbstractWe review the possible formation and orbital stability of Earth-mass or super Earth-mass planets around either of the stars Alpha Centauri A or B and describe a program at Mt John University Observatory using the Doppler method that aims to detect such planets. From New Zealand, we are able to observe the Alpha Centauri system year-round. This is critical in order to acquire data of sufficient quantity and phase coverage to detect the orbit of a terrestrial-mass planet in the habitable zone. Our observations are being made at high resolution (R = 70,000) and high signal-to-noise with the Hercules vacuum echelle spectrograph attached to the 1-m McLellan telescope by a 25-m long optical fibre and using an iodine cell. We discuss the velocity precision and instrumental stability required for success and outline the progress of the observations so far. At present we are collecting about 10,000 observations of each star, A and B, per year with a typical precision of 2.5 m/s per observation.