bluuebunny/crossref_metadata_2025_split huggingface dataset:
Motion planning and posture control of multiple n-link doubly nonholonomic manipulators
Authors: Sharma Bibhya , Vanualailai Jito , Singh Shonal 
Published: March 2015

SUMMARYThe paper considers the problem of motion planning and posture control of multiple n-link doubly nonholonomic mobile manipulators in an obstacle-cluttered and bounded workspace. The workspace is constrained with the existence of an arbitrary number of fixed obstacles (disks, rods and curves), artificial obstacles and moving obstacles. The coordination of multiple n-link doubly nonholonomic mobile manipulators subjected to such constraints becomes therefore a challenging navigational and steering problem that few papers have considered in the past. Our approach to developing the controllers, which are novel decentralized nonlinear acceleration controllers, is based on a Lyapunov control scheme that is not only intuitively understandable but also allows simple but rigorous development of the controllers. Via the scheme, we showed that the avoidance of all types of obstacles was possible, that the manipulators could reach a neighborhood of their goal and that their final orientation approximated the desired orientation. Computer simulations illustrate these results.
Physical Growth in the Neonatal Intensive-Care Unit and Neuropsychological Performance at Preschool Age in very Preterm-Born Singletons
Authors: Raz Sarah , DeBastos Angela K. , Newman Julie Bapp , Peters Brittany N. , Heitzer Andrew M. , Piercy Jamie C. , Batton Daniel G. 
Published: March 2015

AbstractWe studied the associations between early postnatal growth gains and neuropsychological outcome in very preterm-born children. Specifically, we wished to establish whether relationships exist between gains in head circumference (relative to gains in body-weight or length), from birth to hospital discharge, and intellectual, language, or motor, performance at preschool age. We used data from 127 preschoolers, born <33 weeks, all graduates of the William Beaumont Hospital Neonatal Intensive-Care Unit (NICU) in Royal Oak, MI. Cognitive, motor, and language outcomes were evaluated using the Wechsler Preschool and Primary Scales of Intelligence-Revised, Peabody Developmental Scales – 2nd Edition, and the Preschool Language Scale – 3rd Edition, respectively. Differences between Z-scores at birth and hospital discharge, calculated for three anthropometric measures (head circumference, weight, length), were variables of interest in separate simultaneous multiple regression procedures. We statistically adjusted for sex, socioeconomic status, birth weight, length of hospitalization, perinatal complications, and intrauterine growth. Examination of the relationships between anthropometric indices and outcome measures revealed a significant association between NICU head growth and global intelligence, with the Z-difference score for head circumference accounting for a unique portion of the variance in global intelligence (ηp2 =.04). Early postnatal head growth is significantly associated with neuropsychological outcome in very preterm-born preschoolers. To conclude, despite its relative brevity, NICU stay, often overlapping with the end of 2nd and with the 3rd trimester of pregnancy, appears to be a sensitive developmental period for brain substrates underlying neuropsychological functions. (JINS, 2015, 21, 126–136)
In Situ Heater Design for Nanoscale Synchrotron-Based Full-Field Transmission X-Ray Microscopy
Authors: Kiss Andrew M. , Harris William M. , Nakajo Arata , Wang Steve , Vila-Comamala Joan , Deriy Alex , Chiu Wilson K. S. 
Published: March 2015

AbstractThe oxidation of nickel powder under a controlled gas and temperature environment was studied using synchrotron-based full-field transmission X-ray microscopy. The use of this technique allowed for the reaction to be imaged in situ at 55 nm resolution. The setup was designed to fit in the limited working distance of the microscope and to provide the gas and temperature environments analogous to solid oxide fuel cell operating conditions. Chemical conversion from nickel to nickel oxide was confirmed using X-ray absorption near-edge structure. Using an unreacted core model, the reaction rate as a function of temperature and activation energy were calculated. This method can be applied to study many other chemical reactions requiring similar environmental conditions.
The association between religiosity and resuscitation status preference among patients with advanced cancer
Authors: Delgado-Guay Marvin O. , Chisholm Gary , Williams Janet , Bruera Eduardo 
Published: March 2015

AbstractObjective:The potential influence of patient religious and spiritual beliefs on the approach to end-of-life care and resuscitation status preferences is not well understood. The aim of this study was to assess the association between religiosity and resuscitation preferences in advanced-cancer patients.Method:We performed a secondary analysis of a randomized controlled trial that evaluated the influence of physician communication style on patient resuscitation preferences. All patients completed the Santa Clara Strength of Religious Faith Questionnaire–Short Form (SCSRFQ–SF) and expressed their resuscitation preferences. We determined the frequency of resuscitation preferences and its association with intensity of religiosity.Results:A total of 78 patients completed the study. The median age was 54 years, with a range of 18–78. Some 46 (59%) were women; 57 patients (73%) were Caucasian, 15 (19%) African American, and 5 (7%) Hispanic. A total of 46 patients (56%) were Protestant and 13 (17%) Catholic. Some 53 of 60 patients who chose Do Not Resuscitate status (DNR) (88%) and 16 of 18 patients who refused DNR (89%) for a video-simulated patient were highly religious (p = 0.64). When asked about a DNR for themselves after watching the videos, 43 of 48 who refused DNR (90%) and 26 of 30 patients who chose DNR (87%) were highly religious (p = 0.08). The Spearman correlation coefficient for patients choosing DNR for themselves and intensity of religiosity was r = –0.16 (p = 0.16). Some 30 patients (38%) who chose DNR for the video patient refused DNR for themselves, and 42 who chose DNR for both the video patient and themselves (54%) were highly religious (p = NS).Significance of Results:There was no significant association between intensity of patient religiosity and DNR preference for either the video patient or the patients themselves. Other beliefs and demographic factors likely impact end-of-life discussions and resuscitation status preferences.
Past, Present and Future of Chinese Astronomy
Authors: Fang Cheng 
Published: March 2015

AbstractThrough out the ancient history, Chinese astronomers had made tremendous achievements. Since the main purpose of the ancient Chinese astronomy was to study the correlation between man and the universe, all the Emperors made ancient Chinese astronomy the highly regarded science throughout the history. After a brief introduction of the achievement of ancient Chinese astronomy, I describe the beginnings of modern astronomy research in China in the 20th century. Benefiting from the fast development of Chinese economy, the research in astronomy in China has made remarkable progress in recent years. The number of astronomers has doubled in the past ten years, and the number of graduate students has grown over 1300. The current budget for astronomy research is ten times larger than that ten years ago. The research covers all fields in astronomy, from galaxies to the Sun. The recent progress in both the instruments, such as the Guo Shoujing's telescope, a Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST), and the theoretical research will be briefly presented. The ongoing and future projects on the space- and ground-based facilities will be described, including the Five Hundred Meter Aperture Spherical Radio Telescope (FAST), “Chang E” (Lunar mission) project, Hard X-ray Modulate Telescope (HXMT), DArk Matter Particle Explorer (DAMPE), Deep Space Solar Observatory (DSO), Chinese Antarctic Observatory (CAO), 65m steerable radio telescope, Chinese Spectral Radioheliogaph (CSRH) etc.
The Herschel View of Star Formation
Authors: André Philippe 
Published: March 2015

AbstractRecent studies of the nearest star-forming clouds of the Galaxy at submillimeter wavelengths with the Herschel Space Observatory have provided us with unprecedented images of the initial conditions and early phases of the star formation process. The Herschel images reveal an intricate network of filamentary structure in every interstellar cloud. These filaments all exhibit remarkably similar widths - about a tenth of a parsec - but only the densest ones contain prestellar cores, the seeds of future stars. The Herschel results favor a scenario in which interstellar filaments and prestellar cores represent two key steps in the star formation process: first turbulence stirs up the gas, giving rise to a universal web-like structure in the interstellar medium, then gravity takes over and controls the further fragmentation of filaments into prestellar cores and ultimately protostars. This scenario provides new insight into the inefficiency of star formation, the origin of stellar masses, and the global rate of star formation in galaxies. Despite an apparent complexity, global star formation may be governed by relatively simple universal laws from filament to galactic scales.
3-D views of the expanding CME: from the Sun to 1AU
Authors: Rouillard Alexis P. 
Published: March 2015

AbstractThree-dimensional information on Coronal Mass Ejections (CMEs) can be obtained from a wide range of in-situ measurements and remote-sensing techniques. Extreme ultraviolet (EUV) and white-light imaging sensed from several vantage points can be used to infer the 3-D geometry of the different parts that constitute a CME. High-resolution and high-cadence coronal imaging provides detailed information on the formation and release phase of a magnetic flux rope, the lateral expansion of the CME and the reconfiguration of the corona associated with the effects of pressure variations and reconnection. The evolution of the CME in the interplanetary medium and the connection of its various substructures with in-situ measurements can be obtained from multi-point heliospheric imaging.
3D Perspectives of Stellar Activity: Observation and Modelling
Authors: Jardine Moira 
Published: March 2015

AbstractAs the Sun emerges from a period of unprecedented low activity, the nature of the Sun's magnetic field compared to that of other stars is a particularly timely question. Just as observations of the full 3D structure of the solar magnetic field are becoming available through STEREO and SDO, advances in spectropolarimetric techniques now allow us to map the surface magnetic fields of other stars, revealing the great diversity of magnetic geometries that stars of different masses and rotation rates can display. This has now been possible for over 60 main sequence stars, with a smaller number of younger, pre-main sequence stars also mapped. Modelling of coronal structures based on these observations is revealing the full nature of stellar magnetic activity and its possible impact on orbiting planets.
Tracing the evolution within nearby galaxy groups: a multi-wavelength approach
Authors: Bettoni Daniela , Marino Antonina , Rampazzo Roberto , Plana Henri , Rosado Margarita , Galletta Giuseppe , Mazzei Paola , Bianchi Luciana , Buson Lucio M. , Ambrocio-Cruz Patricia , Gabbasov Ruslan 
Published: March 2015

AbstractEvolutionary scenarios suggest that several mechanisms (from inner secular evolution to accretion/merging) may transform galaxy members, driving groups from an active star forming phase to a more passive, typical of dense environments. We are investigating this transition in a nearby group sample, designed to cover a wide range of properties (see also Marino et al. (2010), Bettoni et al. (2011) and Marino et al. (2012)). We study two groups, USGC U268 and USGC U376 located in different regions of the Leo cloud, through a photometric and kinematic characterization of their member galaxies. We revisit the group membership, using results from recent red-shift surveys, and we investigate their substructures. U268, composed of 10 catalogued members and 11 new added members, has a small fraction (~24%) of early-type galaxies (ETGs). U376 has 16 plus 8 new added members, with ~38% of ETGs. We find the significant substructuring in both groups suggesting that they are likely accreting galaxies. U268 is located in a more loose environment than U376. For each member galaxy, broad band integrated and surface photometry have been obtained in far-UV (FUV) and near-UV (NUV) with GALEX, and in u, g, r, i, z (SDSS) bands. Hα imaging and 2D high resolution kinematical data have been obtained using PUMA Scanning Fabry-Perot interferometer at the 2.12 m telescope in San Pedro Mártir (Baja California, México). We improved the galaxy classification and we detected morphological and kinematical distortions that may be connected to either on-going and/or past interaction/accretion events or environmental induced secular evolution. U268 appears more active than U376, with a large fraction of galaxies showing interaction signatures (60% vs. 13%). The presence of bars among late-type galaxies is ~10% in U268 and 29% in U376. The cumulative distribution of (FUV - NUV) colors of galaxies in U268 is significantly different (bluer) than that of U376's galaxies. Most (80%) of the early-type members in U376 inhabits the red sequence, a large fraction of galaxies, of different morphological types, are located in the green valley, while the blue sequence is under-populated with respect to U268.
Ultraviolet Emission from Star-formation in Selected Gas-rich Early-type Galaxies
Authors: Leeuw Lerothodi L. 
Published: March 2015

AbstractWe present GALEX ultraviolet (UV) emission results of star-formation in a small sample of nearby, gas-rich early-type galaxies. The first observational evidence of star-formation in this sample was presented by Leeuw et al.2008, using 350 μm continuum data. The measured far-infrared (far-IR) excess of these galaxies showed that the most likely and dominant heating source of the observed 350 μm continuum emission from dust is star-formation, that could have been triggered by an accretion or merger event. Consistent with starbursts that are less than 1 Gyr (e.g., Kaviraj 2010), the GALEX near-UV (NUV) minus SDSS r-band emission of the galaxies is < 5.5. The UV results corroborate those of mid-IR to radio data for the sample.
Recent star formation in intermediate redshift (0.35< z <1.5) early–type galaxies
Authors: Rutkowski M. J. , Jeong H. , Yi S. , Kaviraj S. , Cohen S. H. , Windhorst R. A. 
Published: March 2015

AbstractWe measured the UV-optical-near-IR spectral energy distributions (SEDs) of redshift z ~ 0.3-1.5 early-type galaxies (ETGs) with the Hubble Space Telescope (HST) Wide Field Camera 3 (Rutkowski et al.2012). We searched for young stellar populations and morphological signatures of the mechanisms driving recent star formation (RSF) in these ETGs in order to provide observational constraints on models of galaxy evolution.
Positive AGN feedback in Centaurus A
Authors: Shabala Stanislav , Crockett R. Mark , Kaviraj Sugata 
Published: March 2015

AbstractWe observed the inner filament of NGC 5128 (Centaurus A) with the Hubble Space Telescope Wide Field Camera 3 (WFC3), using the F225W, F657N and F814W filters. We find a young stellar population near the south-west tip of the filament. We constrain the ages of these stars to 1-3 Myrs. No further recent star formation is found along the filament.We propose an updated explanation for the origin of the inner filament. It has been suggested Sutherland et al.1993 that radio jets can shock the surrounding gas, giving rise to the observed optical line emission. We argue that such shocks can naturally arise due to a weak cocoon-driven bow shock (rather than from the radio jet directly) propagating through the diffuse interstellar medium. We suggest such a shock has overrun a molecular cloud, triggering star formation in the dense molecular core. The outer, more diffuse parts of the cloud are then ablated and shock heated, giving rise to the observed optical line and X-ray emission.
Phaethon-Gemind complex by Pan-STARRS
Authors: Abe Shinsuke 
Published: March 2015

AbstractThe physical nature such as orbital distribution of asteroids is fundamental to understanding how our solar system has been evolved. The connection between Near-Earth Objects (NEOs) and Earth impactors such as meteorites and fireballs are still under debate, since there is no meteorite orbit whose parent NEO was identified. The orbital distribution of NEOs has been investigated by comprehensive sky surveys including Pan-STARRS (The Panoramic Survey Telescope And Rapid Response System). Here we focus on the Phaethon-Gemind complex detected by Pan-STARRS PS1 Prototype Telescope and our follow-up lightcurve observations.
Micrometeoroid Detection in the Inner Planetary Region by the IKAROS-ALADDIN
Authors: YANO Hajime , HIRAI Takayuki , OKAMOTO Chisato , FUJII Masayuki , TANAKA Makoto 
Published: March 2015

AbstractThe ALADDIN (Arrayed Large-Area Dust Detectors in INterplanetary space) made of 0.54 m2 PVDF sensors was deployed on the anti-Sun face of the thin polyimide sail membrane of the deep space solar sail spacecraft gIKAROS (Interplanetary Kitecraft Accelerated by the Radiation Of the Sun)h. It has measured micrometeoroid flux between the Earthfs orbit and Venusf orbit (i.e., 1.0 ~ 0.7 AU of heliocentric distance) for 1.5 revolutions from June 2010 until October 2011. The ALADDIN dust detector is arrayed by 8 channels of 9-20 micron-thick PVDF sensors, which are capable of detecting hypervelocity impacts of micrometeoroids at > ~ 10−12g, according to ground calibration impact experiments. The sensors filter electronic, thermal and vibration noises and can record time, peak hold value above its threshold, and relaxation duration of each impact signal. In total, its cruising measurements counted more than 3000 dust impacts after screening noise signals. The ALADDIN flux in the 2010-2011 epoch was compared with fluxes at similar mass range of micrometeoroids and in similar heliocentric distances measured by Helios in 1970fs and Galileo in 1990fs, both of which were composed of much less number of impact data. Then, it suggested enhancement of dust flux in the trailing edge of circumsolar orbits of the Earth and Venus, which are consistent with previous reports of larger dust grain enhancements observed by infrared telescopes. This also implies that the temporal flux enhancement of large micrometeoroids in the blob may have caused a cascading effect to produce smaller dust by collisions with sporadic meteoroids. Also it is apparent that the micrometeoroid flux increases by approximately one order of magnitude from 1 AU to 0.7 AU during the 2010-2011 epoch. The temporal variance of the Helios flux data in 1976-80 in the same region of 1 AU may be associated with difference of averaged solar activities during both epochs. Since the solar activity in the years 2010-2011 was around the minimum of the solar cycle, smaller micrometeoroids, which are more affected by solar radiation pressure than larger ones, may have survived longer than those in the Helios epoch, which covered from the minimum to the maximum of the solar cycle in late 1970fs.
New Outburst of Centaur Comet (60558) 174P/Echeclus
Authors: Choi Young-Jun , Ishiguro Masateru , Moon Hong-Kyu 
Published: March 2015

AbstractWe report observations of new outburst of Centaur (60558) 174P/Echeclus, using Suprime-Cam of Subaru tele-scope. The outburst was detected by Jager on May 30, 2011 (Jaeger et al., 2011). We made several follow-up observations for this outburst with 1m telescope at Mt. Lemon Optical Astronomy Observatory located in US and 60cm telescope at Sobaeksan Optical Astronomy Observatory in Korea. The very first presence of coma around (60558) 2000 EC98 has been detected by Choi and Weissman (2006) on 2005 December 30.50 UT with the Palomar 5m telescope. Soon after, the object was given the periodic comet designa-tion 174P/Echeclus. We will present the characterstics and discuss the reason of this recursive outburst.
The activity of autumn meteor showers in 2006-2008
Authors: Kartashova Anna 
Published: March 2015

AbstractThe purpose of meteor observations in INASAN is the study of meteor showers, as the elements of the migrant substance of the Solar System, and estimation of risk of hazardous collisions of spacecrafts with the particles of streams. Therefore we need to analyze the meteor events with brightness of up to 8 m, which stay in meteoroid streams for a long time and can be a hazardous for the spacecraft. The results of our single station TV observations of autumn meteor showers for the period from 2006 to 2008 are presented. The high-sensitive hybrid camera (the system with coupled of the Image Intensifier) FAVOR with limiting magnitude for meteors about 9m. . .10m in the field of view 20 × 18 was used for observations. In 2006-2008 from October to November more than 3 thousand of meteors were detected, 65% from them have the brightness from 6m to 9m. The identification with autumn meteor showers (Orionids, Taurids, Draconids, Leonids) was carried out. In order to estimate the density of the influx of meteor matter to the Earth for these meteor showers the Index of meteor activity (IMA) was calculated. The IMA distribution for the period 2006 - 2008 is given. The distributions of autumn meteor showers (the meteors with brightness of up to 8 m) by stellar magnitude from 2006 to 2008 are also presented.
Disk-Resolved Photometry of Cometary Nuclei: Results from DIXI and Stardust-NExT
Authors: Li Jian-Yang , Thomas Peter C. , Veverka Joe , A'Hearn Michael F. , Besse Sebastien , Belton Michael J. S. , Farnham Tony L. , Klaasen Kenneth P. , Lisse Carey M. , McFadden Lucy A. , Sunshine Jessica M. 
Published: March 2015

AbstractPrevious comet flyby missions enabled detailed studies of the photometric properties of several cometary nuclei from disk-resolved images, including 9P/Tempel 1, 19P/Borrelly, and 81P/Wild 2. Two recent missions, DIXI and Stardust-NExT, encountered Comets 103P/Hartley 2 and Tempel 1 respectively, expanding the pool of sampled cometary nuclei in their unique ways: Hartley 2 is a hyperactive comet; Tempel 1 was visited and impacted by the Deep Impact dual-spacecraft during its previous perihelion passage. Photometric modeling shows that the global photometric properties of the nuclei of Hartley 2 and Tempel 1 are similar to those of other cometary nuclei. The photometric variation of the hyperactive nucleus of Hartley 2 is about 15%, similar to that of weakly active comets Tempel 1 and Wild 2. The photometric properties of Tempel 1 measured by NExT suggest little change from those measured by DI. These results, together with the photometric properties of Wild 2 and Borrelly, indicate that the photometric properties of cometary nuclei are independent of the activity level and gross geomorphology of cometary nuclei. Instead, cometary nucleus photometric properties might be determined by its outgassing, which leaves low-albedo deposit on the surface and forms similar photometric texture. The time scale for the photometric alteration on cometary nuclei due to outgassing should be much shorter than the dynamic time scale.