Miracle-dz/UniFAR-FTUs huggingface dataset:
An Electronic Publication Dedicated to Early Stellar Evolution and Molecular Clouds Short Announcements Abstracts of Recently Accepted Papers

an amateur astronomer from Paducah, Kentucky, reports the appearance of a new cometary reflection nebula 1.1 arcminutes in diameter in the Lynds 1630 cloud in Orion. The nebula was found on several images taken on 2004 Jan 23 UT with a 7.6-cm Takahashi refractor + CCD, and it is not present on seven sky survey images from POSS-I, POSS-II and UKSTU taken between 1951 and 1991. Coordinates for the new optical nebula are: R.A. = 5 h 46 m 14 s , Dec =-00 o 05'. 8 (J2000). McNeil's Nebula is apparently associated with IRAS 05436-0007, which consequently may have erupted. The new nebula surrounds the Herbig-Haro object HH 22, which however seems unrelated to the IRAS source. McNeil's Nebula appears very reddened towards the IRAS source, as commonly seen in cometary nebulae. Subsequent CCD images and infrared photometry/spectroscopy obtained at Mauna Kea confirm the emergence of this new nebula, and shows the brightening of a faint optical counterpart to the IRAS source, which displays an emission line spectrum akin to those seen in EXor eruptions. Observers are urged to monitor the development of this rare event before Orion disappears in the evening twilight. We present high-resolution echelle spectra of the irradiated Herbig-Haro jets HH 444, 445, 446, and 447 from the Keck I telescope. The structural, kinematic, and physical properties of the jets near their sources are analyzed in detail. In particular, spatio-kinematic electron density variations and evidence for excited, low-velocity entrained material are found. Despite their proximity to the massive stars in the σ Orionis system, the inner portions of these jets generally exhibit low excitation conditions, consistent with shadowing from circumstellar material. The outflow sources show Hα and forbidden line emission on top of late-type photospheric spectra and strong lithium absorption, indicative of typical classical T Tauri stars. These spectroscopic data are discussed in the context of theoretical models which attempt to account for the generation of outflows. Additionally, narrowband Hubble Space Telescope WFPC2 images of HH 444 and 445 are presented and compared with the spectroscopic data. Besides the jets, the images of both sources reveal extended emission structures which point directly away from σ Ori, and are therefore interpreted as photoevaporating proplyds.
Dual Action of a Carbohydrate Epitope on Afferent and Efferent Axons in Cortical Development

During development of the mammalian cerebral cortex, ingrowing afferents from the thalamus take a path that is different from that of axons leaving the cortical plate. Thalamic axons arrive at the cortex at the time before their target cells of layer 4 are generated in the ventricular zone, but they invade the cortex only shortly before these cells have migrated to their final position in the cortex. Growth-promoting molecules are upregulated in the developing cortical plate during this period. To identify such molecules, we have generated monoclonal antibodies against membrane preparations from rat postnatal cortex. In Western blots, one antibody (mAb 10) recognized a carbohydrate epitope of a glycoprotein with an apparent molecular weight extending from 180 to 370 kDa. Immunohistochemical staining revealed that the staining pattern of mAb 10 at embryonic stages delineates the pathway of thalamocortical axons, with only very faint labeling of the corticofugal pathway. In vitro assays in combination with time-lapse imaging indicated that mAb 10 has opposite effects on the growth of thalamic and cortical axons. The growth speed and axonal elongation of thalamic fibers on postnatal cortical membranes preincubated with mAb 10 was reduced compared with untreated cortical membranes. In contrast, cortical axons grew faster and stopped their growth less frequently after addition of mAb 10 to a cortical membrane substrate. Taken together, these results suggest that a carbohydrate moiety of a membrane-associated glycoprotein plays a role in the segregation of afferent and efferent cortical axons in the white matter. Moreover, the epitope recognized by mAb 10 might also contribute to regulation of the timing of the thalamocortical innervation at later developmental stages.
Modeling and control of spherical ultrasonic motor based on nonholonomic mechanics

In this paper, we propose a new dynamical model of a spherical multi-degree-of-freedom (DOF) ultrasonic motor (USM) and its fundamental control method based on nonholonomic mechanics. This system is analogous to the so-called rolling sphere manipulation system as far as the kinematics is concerned, but there is also an indispensable influence of the momentum dynamics. We propose multi-cycle phase switching (MCPS) method to keep this influence under control, using only two pieces of piezoelectric oscillators for bending vibrations rather than three including a longitudinal vibration as required in the conventional methods.
FPGA Implementation of 8, 16 and 32 Bit LFSR with Maximum Length Feedback Polynomial Using VHDL

LFSR based PN Sequence Generator technique is used for various cryptography applications and for designing encoder, decoder in different communication channel. It is more important to test and verify by implementing on any hardware for getting better efficient result. As FPGAs is used to implement any logical function for faster prototype development, it is necessary to implement the existing design of LFSR on FPGA to test and verify the simulated & synthesis result between different lengths. The total number of random state generated on LFSR depends on the feedback polynomial. As it is simple counter so it can count maximum of 2n-1 by using maximum feedback polynomial. Here in this paper we implemented 8, 16 and 32-bit LFSR on FPGA by using VHDL to study the performance and analysis the behavior of randomness. The analysis is conceded out to find number of gates, memory and speed requirement in FPGA as the number of bits is increased. The comparative study of 8, 16 and 32 bit LFSR on FPGA is shown here to understand the on chip verification. Also the simulation problem for long bit LFSR on FPGA is presented.
The quest towards a winning Enterprise 2.0 collaboration technology adoption strategy

Although Enterprise 2.0 collaboration technologies present enterprises with a significant amount of business benefits; enterprises are still facing challenges in promoting and sustaining end-user adoption. The purpose of this paper is to provide a systematic review on Enterprise 2.0 collaboration technology adoption models, challenges, as well as to provide emerging statistic approaches that purport to address these challenges. The paper will present four critical Enterprise 2.0 adoption elements that need to form part of an Enterprise 2.0 collaboration technology adoption strategy. The four critical elements were derived from the ‘SHARE 2013 for business users’ conference conducted in Johannesburg, South Africa 2013, as well as a review of the existing literature. The four adoption elements include enterprise strategic alignment, adoption strategy, governance, and communication, training and support. The four critical Enterprise 2.0 adoption elements will allow enterprises to ensure strategic alignment between the chosen Enterprise 2.0 collaboration technology toolset and the chosen business strategies. In addition by reviewing and selecting an appropriate adoption strategy that incorporates governance, communication and a training and support system, the enterprise can improve its ability towards a successful Enterprise 2.0 adoption campaign.
Rotation of the pre‐stellar core L1689B

The search for the onset of star formation in pre-stellar cores has focused on the identification of an infall signature in the molecular line profiles of tracer species. The classic infall signature is a double-peaked line profile with an asymmetry in the strength of the peaks such that the blue peak is stronger. L1689B is a pre-stellar core and infall candidate, but new James Clerk Maxwell Telescope (JCMT) HCO+ line profile data, presented here, confirm that both blue and red asymmetric line profiles are present in this source. Moreover, a dividing line can be drawn between the locations where each type of profile is found. It is argued that it is unlikely that the line profiles can be interpreted with simple models of infall or outflow, and that rotation of the inner regions is the most likely explanation. A rotational model is developed in detail with a new three-dimensional molecular line transport code, and it is found that the best type of model is one in which the rotational velocity profile is in between solid-body and Keplerian. It is first shown that red and blue asymmetric line profiles can be generated with a rotation model entirely in the absence of any infall motion. The model is then quantitively compared with the JCMT data, and an iteration over a range of parameters is performed to minimize the difference between the data and the model. The results indicate that rotation can dominate the line profile shape even before the onset of infall.
Self-calibration in visual sensor networks equipped with RGB-D cameras

We consider the self-calibration problem (estimation of location and orientation of multiple camera sensors), in visual sensor networks equipped with RGB-D cameras. We propose two algorithms based on feature matching and relative pose estimation. First one uses Floyd-Warshall algorithm, and can accurately estimate the camera locations. On the other hand, the second algorithm is more scalable than the first one, and can be used in large networks if high accuracy is not an issue. Numerical results demonstrate that both algorithms, depending on the network topology, can be used for self-calibration in RGB-D equipped visual sensor networks.
Deformation Monitoring and Forecasting Model Study Based on Grey System Theory

The grey system theory studies the uncertainty of small sample size problems. This paper using grey system theory in the deformation monitoring field, based on analysis of present grey forecast models, developed the spatial multi-point model. By using residual modification, the spatial multi-point residual model was developed in further study. Then, combined with the sedimentation data of Xiaolangdi Multipurpose Dam, the results are compared and analyzed, the conclusion has been made and the advantages of the residual spatial multi-point model has been proved.
A Characterization of Approximation Resistance

A predicate f:{-1,1}^k -> {0,1} with \rho(f) = \frac{|f^{-1}(1)|}{2^k} is called {\it approximation resistant} if given a near-satisfiable instance of CSP(f), it is computationally hard to find an assignment that satisfies at least \rho(f)+\Omega(1) fraction of the constraints. We present a complete characterization of approximation resistant predicates under the Unique Games Conjecture. We also present characterizations in the {\it mixed} linear and semi-definite programming hierarchy and the Sherali-Adams linear programming hierarchy. In the former case, the characterization coincides with the one based on UGC. Each of the two characterizations is in terms of existence of a probability measure with certain symmetry properties on a natural convex polytope associated with the predicate.
Capital Flows and Exchange Rates

This article focuses on the possible role of capital flows in explaining exchange rate movements. Some commentators have suggested that a substantial increase in capital flows into the United States could have accounted for the recent appreciation of the US dollar. This could imply that capital inflows have increased in response to a rise in the rate of return on capital, which in turn has reflected the structural increase in US productivity seen in recent years. We find evidence to suggest that this may explain part of the recent dollar appreciation, but unsurprisingly it does not provide a full explanation.
SHORT-RANGE INTERCITY TRAFFIC FORECASTING USING ECONOMETRIC TECHNIQUES

The Oklahoma Turnpike Authority (OTA) commissioned a study of econometric modeling techniques that might be employed in short-range traffic forecasting. The OTA uses short-range traffic forecasts for personnel and maintenance scheduling and to comply with bond covenants requiring annual revenue forecasts. This article describes the study, highlighting the methodology, the autoregressive integrated moving average and regression models, and the results. The advantages and disadvantages of each model are presented.
Age-dependent production of IgA and IgM autoantibodies against IgG2a in a colony of 129/Sv mice

Although much of the basic immunological work has been done with mice, little is known about anti-IgG autoantibodies in this species. Dresser (1, 2) has reported the occurrence, in CBA mice, of anti-IgG antibody (Ab)(1) detected by a hemolytic-plaque assay after stimulation with endotoxin or immunization against sheep erythrocytes. IgM rheumatoid factor has also been described in various strains of mice with a systemic lupus erythematosus-like disease (3). Recently, we have tried to induce anti-IgG in mice of the 129/Sv strain by inoculating autologous IgG. To our surprise, we found that the sera of all the animals had, before any inoculation, anti-IgG detectable by agglutination of particles coated with autologous IgG. The possibilities to investigate the mechanism of production and the biological role of this kind of Ab prompted us to undertake a study of the nature and specificity of the mouse anti-IgG.
The giant Hα/X-ray filament in the cluster of galaxies A1795

The cluster of galaxies A1795 hosts a 46 kpc long filament at its core, which is clearly visible in the light of Hα and X-ray emission. We present optical slit spectroscopy and deeper Chandra X-ray data of the filament. The optical spectra reveal that the bulk of the filament is quiescent (with σ< 130 km s −1 ), although considerable velocity structure is apparent around the powerful radio source in the central cluster galaxy, where a direct interaction is occurring between the radio plasma and the surrounding intracluster medium. The filament contains a clump of ultraviolet/blue continuum halfway along its length, which we resolve into a chain of at least five distinct knots using archival Hubble Space Telescope images; the optical spectrum of this clump confirms it to be mostly composed of O stars. It is well-removed from the central galaxy and radio source, and is most likely an example of a group of young star clusters condensing directly from the cooling gas in the filament. The observed spatial offset between these knots of star formation and the peak in the optical line emission confirms that the massive star formation is most unlikely to be responsible for the bulk of the observed emission-line luminosity in the filament. Some other (as yet undetermined) source of energy is required to power and maintain the optical line emission, yet it must not completely impede the cooling of the X-ray gas within the filament to form the star clusters. Ke yw ords: galaxies: clusters: individual: A1795 ‐ X-rays: galaxies: clusters.
Test case generation using Prolog

For the validation of the kernel system calls of a family of UNIX 1) systems a knowledge based test environment was conceived. A prototype version is currently implemented in Prolog. The knowledge base consists essentially of three parts:test case specifications of the various system calls, a test suite generator with predicates including information about UNIX system properties and sound test practices, and a test protocol archive including utilities to extract and prepare reports about the test results. All information in the knowledge base is stored as Horn clauses, i.e. facts and rules immediately to be consulted and executed by a Prolog interpreter.
The effects of transport costs revisited

The aim of this paper is to study the location decisions of upstream and downstream industries when transport costs in each sector are analyzed separately. By using a new economic geography model built on Venables (1996), it will be shown that the effects of cost reductions in transporting final goods are different from those in intermediate goods. Our analysis suggests that regional convergence is more the consequence of improvements in transportation between upstream and downstream firms than those between firms and consumers. This will help us to better understand the forces driving this kind of model while giving an additional explanation to the differences between Krugman’s (1991) results and those of Venables (1996).
Stochastic proximity embedding

We introduce stochastic proximity embedding (SPE), a novel self‐organizing algorithm for producing meaningful underlying dimensions from proximity data. SPE attempts to generate low‐dimensional Euclidean embeddings that best preserve the similarities between a set of related observations. The method starts with an initial configuration, and iteratively refines it by repeatedly selecting pairs of objects at random, and adjusting their coordinates so that their distances on the map match more closely their respective proximities. The magnitude of these adjustments is controlled by a learning rate parameter, which decreases during the course of the simulation to avoid oscillatory behavior. Unlike classical multidimensional scaling (MDS) and nonlinear mapping (NLM), SPE scales linearly with respect to sample size, and can be applied to very large data sets that are intractable by conventional embedding procedures. The method is programmatically simple, robust, and convergent, and can be applied to a wide range of scientific problems involving exploratory data analysis and visualization. © 2003 Wiley Periodicals, Inc. J Comput Chem 24: 1215–1221, 2003
Automatic detection of vocal folds from high-speed imaging

An automatic image processing method is proposed to extract vocal fold vibrations from high-speed digital imaging. Extracted regular vocal fold vibrations contribute to periodic voices, and irregular vocal fold vibrations contribute to aperiodic voices. The effects of image resolutions are investigated. This study combines the features of both image and voice signal processing and provides a valuable automatic image processing technique for the measurement and quantification of voice productions from high-speed imaging.
Lärarförbundet, förskollärare och statushöjande strategier. Ett könsperspektiv på professionalisering

This dissertation concerns the strategies of professionalisation that the Teachers’ Union pursues in order to upgrade pre-school teachers’ work and professional knowledge. Both union actions in general and customary strategies of professionalisation have been criticised for presupposing men as the norm. This is considered to have contributed to obscuring and devaluing work and professional knowledge which are more specific to female-dominated professional groups. Therefore the strategies of the Teachers’ Union are studied in the dissertation from a gender perspective. The Union’s perceptions of status-raising strategies are compared with those of the strongly female-dominated pre-school teacher corps, and an analysis is made of whether the Union’s strategies contribute to maintaining or to changing the value-discrimination that female-dominated professional groups’ work and knowledge risk suffering. The dissertation also examines common professionalisation strategies from a gender perspective. The analyses are based upon union documents, interviews with union representatives, a questionnaire investigation among 265 pre-school teachers, the views expressed by such teachers in newspaper letters and articles, research on professions, feminist research, and work-evaluation projects. The results show that a majority of the pre-school teachers in the questionnaire study think that most of the strategies pursued by the Teachers’ Union contribute to upgrading their status. At the same time they believe that other factors not emphasised by the Union in its strategies are also important for the profession’s status. This has to do with their task of giving children more egalitarian conditions of upbringing, their work with development and care, and their emotional and social competences. These work-tasks and competences are more usual in female-dominated professional groups and have often been subjected to value-discrimination. When the Teachers’ Union refrains from emphasising them, it can contribute to maintaining this value-discrimination. Nonetheless, the strategies which the Union chooses to pursue can support the upgrading of pre-school teachers’ work and professional knowledge It may, however, be that the union strategies primarily benefit those pre-school teachers who work in a pre-school class and that they thereby enhance differences in status within the pre-school teacher corps.
Interferon-Inducible Protein IFIXα1 Functions as a Negative Regulator of HDM2

ABSTRACT The 200-amino-acid repeat (HIN-200) gene family with the hematopoietic interferon (IFN)-inducible nuclear protein encodes highly homologous proteins involved in cell growth, differentiation, autoimmunity, and tumor suppression. IFIX is the newest member of the human HIN-200 family and is often downregulated in breast tumors and breast cancer cell lines. The expression of the longest isoform of IFIX gene products, IFIXα1, is associated with growth inhibition, suppression of transformation, and tumorigenesis. However, the mechanism underlying the tumor suppression activity of IFIXα1 is not well understood. Here, we show that IFIXα1 downregulates HDM2, a principal negative regulator of p53, at the posttranslational level. IFIXα1 destabilizes HDM2 protein and promotes its ubiquitination. The E3 ligase activity of HDM2 appears to be required for this IFIXα1 effect. Importantly, HDM2 downregulation is required for the IFIXα1-mediated increase of p53 protein levels, transcriptional activity, and nuclear localization, suggesting that IFIXα1 positively regulates p53 by acting as a negative regulator of HDM2. We found that IFIXα1 interacts with HDM2. Interestingly, the signature motif of the HIN-200 gene family, i.e., the 200-amino-acid HIN domain of IFIXα1, is sufficient not only for binding HDM2 but also for downregulating it, leading to p53 activation. Finally, we show that IFIX mediates HDM2 downregulation in an IFN-inducible system. Together, these results suggest that IFIXα1 functions as a tumor suppressor by repressing HDM2 function.
Numerical Analysis of Mass Transfer in Countercurrently Parallel-Flow Rectangular Dialyzer with Internal Recycle for Improved Performance

The effect of mass transfer in parallel-flow rectangular dialyzers with internal recycle has been investigated. In contrast to the same size device without recycle, considerable improvement in performance is achievable if one of the flow channels, either retentate phase or dialysate phase, is divided into two subchannels of same width (w/2) with one performed as the operating subchannel and the other as the reflux cochannel, which provides the increase in the fluid velocity, resulting in reduction of mass-transfer resistance. The improvement by recycle operation increases both the flow rate of liquid and reflux ratio with negligible amount of hydraulic-dissipated energy.